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1 : : /* Process declarations and variables for -*- C++ -*- compiler.
2 : : Copyright (C) 1988-2025 Free Software Foundation, Inc.
3 : : Contributed by Michael Tiemann (tiemann@cygnus.com)
4 : :
5 : : This file is part of GCC.
6 : :
7 : : GCC is free software; you can redistribute it and/or modify
8 : : it under the terms of the GNU General Public License as published by
9 : : the Free Software Foundation; either version 3, or (at your option)
10 : : any later version.
11 : :
12 : : GCC is distributed in the hope that it will be useful,
13 : : but WITHOUT ANY WARRANTY; without even the implied warranty of
14 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 : : GNU General Public License for more details.
16 : :
17 : : You should have received a copy of the GNU General Public License
18 : : along with GCC; see the file COPYING3. If not see
19 : : <http://www.gnu.org/licenses/>. */
20 : :
21 : :
22 : : /* Process declarations and symbol lookup for C++ front end.
23 : : Also constructs types; the standard scalar types at initialization,
24 : : and structure, union, array and enum types when they are declared. */
25 : :
26 : : /* ??? not all decl nodes are given the most useful possible
27 : : line numbers. For example, the CONST_DECLs for enum values. */
28 : :
29 : : #include "config.h"
30 : : #include "system.h"
31 : : #include "coretypes.h"
32 : : #include "target.h"
33 : : #include "c-family/c-target.h"
34 : : #include "cp-tree.h"
35 : : #include "timevar.h"
36 : : #include "stringpool.h"
37 : : #include "cgraph.h"
38 : : #include "stor-layout.h"
39 : : #include "varasm.h"
40 : : #include "attribs.h"
41 : : #include "flags.h"
42 : : #include "tree-iterator.h"
43 : : #include "decl.h"
44 : : #include "intl.h"
45 : : #include "toplev.h"
46 : : #include "c-family/c-objc.h"
47 : : #include "c-family/c-pragma.h"
48 : : #include "c-family/c-ubsan.h"
49 : : #include "cp/cp-name-hint.h"
50 : : #include "debug.h"
51 : : #include "plugin.h"
52 : : #include "builtins.h"
53 : : #include "gimplify.h"
54 : : #include "asan.h"
55 : : #include "gcc-rich-location.h"
56 : : #include "langhooks.h"
57 : : #include "context.h" /* For 'g'. */
58 : : #include "omp-general.h"
59 : : #include "omp-offload.h" /* For offload_vars. */
60 : : #include "opts.h"
61 : : #include "langhooks-def.h" /* For lhd_simulate_record_decl */
62 : : #include "coroutines.h"
63 : : #include "gcc-urlifier.h"
64 : : #include "diagnostic-highlight-colors.h"
65 : : #include "pretty-print-markup.h"
66 : :
67 : : /* Possible cases of bad specifiers type used by bad_specifiers. */
68 : : enum bad_spec_place {
69 : : BSP_VAR, /* variable */
70 : : BSP_PARM, /* parameter */
71 : : BSP_TYPE, /* type */
72 : : BSP_FIELD /* field */
73 : : };
74 : :
75 : : static const char *redeclaration_error_message (tree, tree);
76 : :
77 : : static bool decl_jump_unsafe (tree);
78 : : static void require_complete_types_for_parms (tree);
79 : : static tree grok_reference_init (tree, tree, tree, int);
80 : : static tree grokvardecl (tree, tree, tree, const cp_decl_specifier_seq *,
81 : : int, int, int, bool, int, tree, location_t);
82 : : static void check_static_variable_definition (tree, tree);
83 : : static void record_unknown_type (tree, const char *);
84 : : static int member_function_or_else (tree, tree, enum overload_flags);
85 : : static tree local_variable_p_walkfn (tree *, int *, void *);
86 : : static const char *tag_name (enum tag_types);
87 : : static tree lookup_and_check_tag (enum tag_types, tree, TAG_how, bool);
88 : : static void maybe_deduce_size_from_array_init (tree, tree);
89 : : static void layout_var_decl (tree);
90 : : static tree check_initializer (tree, tree, int, vec<tree, va_gc> **);
91 : : static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
92 : : static void copy_type_enum (tree , tree);
93 : : static void check_function_type (tree, tree);
94 : : static void begin_destructor_body (void);
95 : : static void record_key_method_defined (tree);
96 : : static tree create_array_type_for_decl (tree, tree, tree, location_t);
97 : : static tree get_atexit_node (void);
98 : : static tree get_dso_handle_node (void);
99 : : static tree start_cleanup_fn (tree, bool, bool);
100 : : static void end_cleanup_fn (void);
101 : : static tree cp_make_fname_decl (location_t, tree, int);
102 : : static void initialize_predefined_identifiers (void);
103 : : static tree check_special_function_return_type
104 : : (special_function_kind, tree, tree, int, const cp_declarator**,
105 : : const location_t*);
106 : : static tree push_cp_library_fn (enum tree_code, tree, int);
107 : : static tree build_cp_library_fn (tree, enum tree_code, tree, int);
108 : : static void store_parm_decls (tree);
109 : : static void initialize_local_var (tree, tree, bool);
110 : : static void expand_static_init (tree, tree);
111 : : static location_t smallest_type_location (const cp_decl_specifier_seq*);
112 : : static bool identify_goto (tree, location_t, const location_t *,
113 : : diagnostic_t, bool);
114 : :
115 : : /* The following symbols are subsumed in the cp_global_trees array, and
116 : : listed here individually for documentation purposes.
117 : :
118 : : C++ extensions
119 : : tree wchar_decl_node;
120 : :
121 : : tree vtable_entry_type;
122 : : tree delta_type_node;
123 : : tree __t_desc_type_node;
124 : :
125 : : tree class_type_node;
126 : : tree unknown_type_node;
127 : :
128 : : Array type `vtable_entry_type[]'
129 : :
130 : : tree vtbl_type_node;
131 : : tree vtbl_ptr_type_node;
132 : :
133 : : Namespaces,
134 : :
135 : : tree std_node;
136 : : tree abi_node;
137 : :
138 : : A FUNCTION_DECL which can call `abort'. Not necessarily the
139 : : one that the user will declare, but sufficient to be called
140 : : by routines that want to abort the program.
141 : :
142 : : tree abort_fndecl;
143 : :
144 : : Used by RTTI
145 : : tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
146 : : tree tinfo_var_id; */
147 : :
148 : : tree cp_global_trees[CPTI_MAX];
149 : :
150 : : /* A list of objects which have constructors or destructors
151 : : which reside in namespace scope. The decl is stored in
152 : : the TREE_VALUE slot and the initializer is stored
153 : : in the TREE_PURPOSE slot. */
154 : : tree static_aggregates;
155 : :
156 : : /* Like static_aggregates, but for thread_local variables. */
157 : : tree tls_aggregates;
158 : :
159 : : /* A hash-map mapping from variable decls to the dynamic initializer for
160 : : the decl. This is currently only used by OpenMP. */
161 : : decl_tree_map *dynamic_initializers;
162 : :
163 : : /* -- end of C++ */
164 : :
165 : : /* A node for the integer constant 2. */
166 : :
167 : : tree integer_two_node;
168 : :
169 : : /* vector of static decls. */
170 : : vec<tree, va_gc> *static_decls;
171 : :
172 : : /* vector of keyed classes. */
173 : : vec<tree, va_gc> *keyed_classes;
174 : :
175 : : /* Used only for jumps to as-yet undefined labels, since jumps to
176 : : defined labels can have their validity checked immediately. */
177 : :
178 : : struct GTY((chain_next ("%h.next"))) named_label_use_entry {
179 : : struct named_label_use_entry *next;
180 : : /* The binding level to which this entry is *currently* attached.
181 : : This is initially the binding level in which the goto appeared,
182 : : but is modified as scopes are closed. */
183 : : cp_binding_level *binding_level;
184 : : /* The head of the names list that was current when the goto appeared,
185 : : or the inner scope popped. These are the decls that will *not* be
186 : : skipped when jumping to the label. */
187 : : tree names_in_scope;
188 : : /* If the use is a possible destination of a computed goto, a vec of decls
189 : : that aren't destroyed, filled in by poplevel_named_label_1. */
190 : : vec<tree,va_gc> *computed_goto;
191 : : /* The location of the goto, for error reporting. */
192 : : location_t o_goto_locus;
193 : : /* True if an OpenMP structured block scope has been closed since
194 : : the goto appeared. This means that the branch from the label will
195 : : illegally exit an OpenMP scope. */
196 : : bool in_omp_scope;
197 : : };
198 : :
199 : : /* A list of all LABEL_DECLs in the function that have names. Here so
200 : : we can clear out their names' definitions at the end of the
201 : : function, and so we can check the validity of jumps to these labels. */
202 : :
203 : : struct GTY((for_user)) named_label_entry {
204 : :
205 : : tree name; /* Name of decl. */
206 : :
207 : : tree label_decl; /* LABEL_DECL, unless deleted local label. */
208 : :
209 : : named_label_entry *outer; /* Outer shadowed chain. */
210 : :
211 : : /* The binding level to which the label is *currently* attached.
212 : : This is initially set to the binding level in which the label
213 : : is defined, but is modified as scopes are closed. */
214 : : cp_binding_level *binding_level;
215 : :
216 : : /* The head of the names list that was current when the label was
217 : : defined, or the inner scope popped. These are the decls that will
218 : : be skipped when jumping to the label. */
219 : : tree names_in_scope;
220 : :
221 : : /* A vector of all decls from all binding levels that would be
222 : : crossed by a backward branch to the label. */
223 : : vec<tree, va_gc> *bad_decls;
224 : :
225 : : /* A list of uses of the label, before the label is defined. */
226 : : named_label_use_entry *uses;
227 : :
228 : : /* True if we've seen &&label. Appalently we can't use TREE_ADDRESSABLE for
229 : : this, it has a more specific meaning for LABEL_DECL. */
230 : : bool addressed;
231 : :
232 : : /* The following bits are set after the label is defined, and are
233 : : updated as scopes are popped. They indicate that a jump to the
234 : : label will illegally enter a scope of the given flavor. */
235 : : bool in_try_scope;
236 : : bool in_catch_scope;
237 : : bool in_omp_scope;
238 : : bool in_transaction_scope;
239 : : bool in_constexpr_if;
240 : : bool in_consteval_if;
241 : : bool in_stmt_expr;
242 : : };
243 : :
244 : : #define named_labels cp_function_chain->x_named_labels
245 : :
246 : : /* The number of function bodies which we are currently processing.
247 : : (Zero if we are at namespace scope, one inside the body of a
248 : : function, two inside the body of a function in a local class, etc.) */
249 : : int function_depth;
250 : :
251 : : /* Whether the exception-specifier is part of a function type (i.e. C++17). */
252 : : bool flag_noexcept_type;
253 : :
254 : : /* States indicating how grokdeclarator() should handle declspecs marked
255 : : with __attribute__((deprecated)). An object declared as
256 : : __attribute__((deprecated)) suppresses warnings of uses of other
257 : : deprecated items. */
258 : : enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
259 : :
260 : :
261 : : /* A list of VAR_DECLs whose type was incomplete at the time the
262 : : variable was declared. */
263 : :
264 : : struct GTY(()) incomplete_var {
265 : : tree decl;
266 : : tree incomplete_type;
267 : : };
268 : :
269 : :
270 : : static GTY(()) vec<incomplete_var, va_gc> *incomplete_vars;
271 : :
272 : : /* Returns the kind of template specialization we are currently
273 : : processing, given that it's declaration contained N_CLASS_SCOPES
274 : : explicit scope qualifications. */
275 : :
276 : : tmpl_spec_kind
277 : 215408514 : current_tmpl_spec_kind (int n_class_scopes)
278 : : {
279 : 215408514 : int n_template_parm_scopes = 0;
280 : 215408514 : int seen_specialization_p = 0;
281 : 215408514 : int innermost_specialization_p = 0;
282 : 215408514 : cp_binding_level *b;
283 : :
284 : : /* Scan through the template parameter scopes. */
285 : 215408514 : for (b = current_binding_level;
286 : 270294131 : b->kind == sk_template_parms;
287 : 54885617 : b = b->level_chain)
288 : : {
289 : : /* If we see a specialization scope inside a parameter scope,
290 : : then something is wrong. That corresponds to a declaration
291 : : like:
292 : :
293 : : template <class T> template <> ...
294 : :
295 : : which is always invalid since [temp.expl.spec] forbids the
296 : : specialization of a class member template if the enclosing
297 : : class templates are not explicitly specialized as well. */
298 : 54885617 : if (b->explicit_spec_p)
299 : : {
300 : 908724 : if (n_template_parm_scopes == 0)
301 : : innermost_specialization_p = 1;
302 : : else
303 : 1053 : seen_specialization_p = 1;
304 : : }
305 : 53976893 : else if (seen_specialization_p == 1)
306 : : return tsk_invalid_member_spec;
307 : :
308 : 54885617 : ++n_template_parm_scopes;
309 : : }
310 : :
311 : : /* Handle explicit instantiations. */
312 : 215408514 : if (processing_explicit_instantiation)
313 : : {
314 : 1962218 : if (n_template_parm_scopes != 0)
315 : : /* We've seen a template parameter list during an explicit
316 : : instantiation. For example:
317 : :
318 : : template <class T> template void f(int);
319 : :
320 : : This is erroneous. */
321 : : return tsk_invalid_expl_inst;
322 : : else
323 : 1962218 : return tsk_expl_inst;
324 : : }
325 : :
326 : 213446296 : if (n_template_parm_scopes < n_class_scopes)
327 : : /* We've not seen enough template headers to match all the
328 : : specialized classes present. For example:
329 : :
330 : : template <class T> void R<T>::S<T>::f(int);
331 : :
332 : : This is invalid; there needs to be one set of template
333 : : parameters for each class. */
334 : : return tsk_insufficient_parms;
335 : 213446296 : else if (n_template_parm_scopes == n_class_scopes)
336 : : /* We're processing a non-template declaration (even though it may
337 : : be a member of a template class.) For example:
338 : :
339 : : template <class T> void S<T>::f(int);
340 : :
341 : : The `class T' matches the `S<T>', leaving no template headers
342 : : corresponding to the `f'. */
343 : : return tsk_none;
344 : 46836158 : else if (n_template_parm_scopes > n_class_scopes + 1)
345 : : /* We've got too many template headers. For example:
346 : :
347 : : template <> template <class T> void f (T);
348 : :
349 : : There need to be more enclosing classes. */
350 : : return tsk_excessive_parms;
351 : : else
352 : : /* This must be a template. It's of the form:
353 : :
354 : : template <class T> template <class U> void S<T>::f(U);
355 : :
356 : : This is a specialization if the innermost level was a
357 : : specialization; otherwise it's just a definition of the
358 : : template. */
359 : 93252976 : return innermost_specialization_p ? tsk_expl_spec : tsk_template;
360 : : }
361 : :
362 : : /* Exit the current scope. */
363 : :
364 : : void
365 : 83480465 : finish_scope (void)
366 : : {
367 : 83480465 : poplevel (0, 0, 0);
368 : 83480465 : }
369 : :
370 : : /* When a label goes out of scope, check to see if that label was used
371 : : in a valid manner, and issue any appropriate warnings or errors. */
372 : :
373 : : static void
374 : 18985 : check_label_used (tree label)
375 : : {
376 : 18985 : if (!processing_template_decl)
377 : : {
378 : 18738 : if (DECL_INITIAL (label) == NULL_TREE)
379 : : {
380 : 9 : location_t location;
381 : :
382 : 9 : error ("label %q+D used but not defined", label);
383 : 9 : location = input_location;
384 : : /* FIXME want (LOCATION_FILE (input_location), (line)0) */
385 : : /* Avoid crashing later. */
386 : 9 : define_label (location, DECL_NAME (label));
387 : : }
388 : : else
389 : 18729 : warn_for_unused_label (label);
390 : : }
391 : 18985 : }
392 : :
393 : : /* Helper function to sort named label entries in a vector by DECL_UID. */
394 : :
395 : : static int
396 : 230194 : sort_labels (const void *a, const void *b)
397 : : {
398 : 230194 : tree label1 = *(tree const *) a;
399 : 230194 : tree label2 = *(tree const *) b;
400 : :
401 : : /* DECL_UIDs can never be equal. */
402 : 230194 : return DECL_UID (label1) > DECL_UID (label2) ? -1 : +1;
403 : : }
404 : :
405 : : /* At the end of a function, all labels declared within the function
406 : : go out of scope. BLOCK is the top-level block for the
407 : : function. */
408 : :
409 : : static void
410 : 136360273 : pop_labels (tree block)
411 : : {
412 : 136360273 : if (!named_labels)
413 : 136356270 : return;
414 : :
415 : : /* We need to add the labels to the block chain, so debug
416 : : information is emitted. But, we want the order to be stable so
417 : : need to sort them first. Otherwise the debug output could be
418 : : randomly ordered. I guess it's mostly stable, unless the hash
419 : : table implementation changes. */
420 : 4003 : auto_vec<tree, 32> labels (named_labels->elements ());
421 : 4003 : hash_table<named_label_hash>::iterator end (named_labels->end ());
422 : 22967 : for (hash_table<named_label_hash>::iterator iter
423 : 45934 : (named_labels->begin ()); iter != end; ++iter)
424 : : {
425 : 18964 : named_label_entry *ent = *iter;
426 : :
427 : 18964 : gcc_checking_assert (!ent->outer);
428 : 18964 : if (ent->label_decl)
429 : 18778 : labels.quick_push (ent->label_decl);
430 : 18964 : ggc_free (ent);
431 : : }
432 : 4003 : named_labels = NULL;
433 : 4003 : labels.qsort (sort_labels);
434 : :
435 : 22781 : while (labels.length ())
436 : : {
437 : 18778 : tree label = labels.pop ();
438 : :
439 : 18778 : DECL_CHAIN (label) = BLOCK_VARS (block);
440 : 18778 : BLOCK_VARS (block) = label;
441 : :
442 : 18778 : check_label_used (label);
443 : : }
444 : 4003 : }
445 : :
446 : : /* At the end of a block with local labels, restore the outer definition. */
447 : :
448 : : static void
449 : 207 : pop_local_label (tree id, tree label)
450 : : {
451 : 207 : check_label_used (label);
452 : 207 : named_label_entry **slot = named_labels->find_slot_with_hash
453 : 207 : (id, IDENTIFIER_HASH_VALUE (id), NO_INSERT);
454 : 207 : named_label_entry *ent = *slot;
455 : :
456 : 207 : if (ent->outer)
457 : : ent = ent->outer;
458 : : else
459 : : {
460 : 198 : ent = ggc_cleared_alloc<named_label_entry> ();
461 : 198 : ent->name = id;
462 : : }
463 : 207 : *slot = ent;
464 : 207 : }
465 : :
466 : : /* The following two routines are used to interface to Objective-C++.
467 : : The binding level is purposely treated as an opaque type. */
468 : :
469 : : void *
470 : 0 : objc_get_current_scope (void)
471 : : {
472 : 0 : return current_binding_level;
473 : : }
474 : :
475 : : /* The following routine is used by the NeXT-style SJLJ exceptions;
476 : : variables get marked 'volatile' so as to not be clobbered by
477 : : _setjmp()/_longjmp() calls. All variables in the current scope,
478 : : as well as parent scopes up to (but not including) ENCLOSING_BLK
479 : : shall be thusly marked. */
480 : :
481 : : void
482 : 0 : objc_mark_locals_volatile (void *enclosing_blk)
483 : : {
484 : 0 : cp_binding_level *scope;
485 : :
486 : 0 : for (scope = current_binding_level;
487 : 0 : scope && scope != enclosing_blk;
488 : 0 : scope = scope->level_chain)
489 : : {
490 : 0 : tree decl;
491 : :
492 : 0 : for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
493 : 0 : objc_volatilize_decl (decl);
494 : :
495 : : /* Do not climb up past the current function. */
496 : 0 : if (scope->kind == sk_function_parms)
497 : : break;
498 : : }
499 : 0 : }
500 : :
501 : : /* True if B is the level for the condition of a constexpr if. */
502 : :
503 : : static bool
504 : 1811981 : level_for_constexpr_if (cp_binding_level *b)
505 : : {
506 : 1809238 : return (b->kind == sk_cond && b->this_entity
507 : 264 : && TREE_CODE (b->this_entity) == IF_STMT
508 : 1812245 : && IF_STMT_CONSTEXPR_P (b->this_entity));
509 : : }
510 : :
511 : : /* True if B is the level for the condition of a consteval if. */
512 : :
513 : : static bool
514 : 1811957 : level_for_consteval_if (cp_binding_level *b)
515 : : {
516 : 1809214 : return (b->kind == sk_cond && b->this_entity
517 : 240 : && TREE_CODE (b->this_entity) == IF_STMT
518 : 1812197 : && IF_STMT_CONSTEVAL_P (b->this_entity));
519 : : }
520 : :
521 : : /* True if T is a non-static VAR_DECL that has a non-trivial destructor.
522 : : See [stmt.dcl]/2. */
523 : :
524 : : static bool
525 : 25 : automatic_var_with_nontrivial_dtor_p (const_tree t)
526 : : {
527 : 25 : if (error_operand_p (t))
528 : : return false;
529 : :
530 : 19 : return (VAR_P (t)
531 : 19 : && decl_storage_duration (CONST_CAST_TREE (t)) == dk_auto
532 : 38 : && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (t)));
533 : : }
534 : :
535 : : /* Update data for defined and undefined labels when leaving a scope. */
536 : :
537 : : int
538 : 140331 : poplevel_named_label_1 (named_label_entry **slot, cp_binding_level *bl)
539 : : {
540 : 140331 : named_label_entry *ent = *slot;
541 : 140331 : cp_binding_level *obl = bl->level_chain;
542 : :
543 : 140331 : if (ent->binding_level == bl)
544 : : {
545 : 7828 : tree decl;
546 : :
547 : : /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
548 : : TREE_LISTs representing OVERLOADs, so be careful. */
549 : 11208 : for (decl = ent->names_in_scope; decl; decl = (DECL_P (decl)
550 : 3453 : ? DECL_CHAIN (decl)
551 : 73 : : TREE_CHAIN (decl)))
552 : 3380 : if (decl_jump_unsafe (decl))
553 : 1277 : vec_safe_push (ent->bad_decls, decl);
554 : :
555 : 7828 : ent->binding_level = obl;
556 : 7828 : ent->names_in_scope = obl->names;
557 : 7828 : switch (bl->kind)
558 : : {
559 : 42 : case sk_try:
560 : 42 : ent->in_try_scope = true;
561 : 42 : break;
562 : 27 : case sk_catch:
563 : 27 : ent->in_catch_scope = true;
564 : 27 : break;
565 : 269 : case sk_omp:
566 : 269 : ent->in_omp_scope = true;
567 : 269 : break;
568 : 3 : case sk_transaction:
569 : 3 : ent->in_transaction_scope = true;
570 : 3 : break;
571 : 45 : case sk_stmt_expr:
572 : 45 : ent->in_stmt_expr = true;
573 : 45 : break;
574 : 2938 : case sk_block:
575 : 2938 : if (level_for_constexpr_if (bl->level_chain))
576 : 15 : ent->in_constexpr_if = true;
577 : 2923 : else if (level_for_consteval_if (bl->level_chain))
578 : 30 : ent->in_consteval_if = true;
579 : : break;
580 : : default:
581 : : break;
582 : : }
583 : : }
584 : 132503 : else if (ent->uses)
585 : : {
586 : : struct named_label_use_entry *use;
587 : :
588 : 7305 : for (use = ent->uses; use ; use = use->next)
589 : 4069 : if (use->binding_level == bl)
590 : : {
591 : 1752 : if (auto &cg = use->computed_goto)
592 : : {
593 : 57 : if (bl->kind == sk_catch)
594 : 3 : vec_safe_push (cg, get_identifier ("catch"));
595 : 66 : for (tree d = use->names_in_scope; d; d = DECL_CHAIN (d))
596 : 9 : if (automatic_var_with_nontrivial_dtor_p (d))
597 : 6 : vec_safe_push (cg, d);
598 : : }
599 : :
600 : 1752 : use->binding_level = obl;
601 : 1752 : use->names_in_scope = obl->names;
602 : 1752 : if (bl->kind == sk_omp)
603 : 12 : use->in_omp_scope = true;
604 : : }
605 : : }
606 : :
607 : 140331 : return 1;
608 : : }
609 : :
610 : : /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
611 : : when errors were reported, except for -Werror-unused-but-set-*. */
612 : : static int unused_but_set_errorcount;
613 : :
614 : : /* Exit a binding level.
615 : : Pop the level off, and restore the state of the identifier-decl mappings
616 : : that were in effect when this level was entered.
617 : :
618 : : If KEEP == 1, this level had explicit declarations, so
619 : : and create a "block" (a BLOCK node) for the level
620 : : to record its declarations and subblocks for symbol table output.
621 : :
622 : : If FUNCTIONBODY is nonzero, this level is the body of a function,
623 : : so create a block as if KEEP were set and also clear out all
624 : : label names.
625 : :
626 : : If REVERSE is nonzero, reverse the order of decls before putting
627 : : them into the BLOCK. */
628 : :
629 : : tree
630 : 548806143 : poplevel (int keep, int reverse, int functionbody)
631 : : {
632 : 548806143 : tree link;
633 : : /* The chain of decls was accumulated in reverse order.
634 : : Put it into forward order, just for cleanliness. */
635 : 548806143 : tree decls;
636 : 548806143 : tree subblocks;
637 : 548806143 : tree block;
638 : 548806143 : tree decl;
639 : 548806143 : scope_kind kind;
640 : :
641 : 548806143 : auto_cond_timevar tv (TV_NAME_LOOKUP);
642 : 548806383 : restart:
643 : :
644 : 548806383 : block = NULL_TREE;
645 : :
646 : 548806383 : gcc_assert (current_binding_level->kind != sk_class
647 : : && current_binding_level->kind != sk_namespace);
648 : :
649 : 548806383 : if (current_binding_level->kind == sk_cleanup)
650 : : functionbody = 0;
651 : 548806383 : subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
652 : :
653 : 548806383 : gcc_assert (!vec_safe_length (current_binding_level->class_shadowed));
654 : :
655 : : /* We used to use KEEP == 2 to indicate that the new block should go
656 : : at the beginning of the list of blocks at this binding level,
657 : : rather than the end. This hack is no longer used. */
658 : 548806383 : gcc_assert (keep == 0 || keep == 1);
659 : :
660 : 548806383 : if (current_binding_level->keep)
661 : 6993222 : keep = 1;
662 : :
663 : : /* Any uses of undefined labels, and any defined labels, now operate
664 : : under constraints of next binding contour. */
665 : 548806383 : if (cfun && !functionbody && named_labels)
666 : 43758 : named_labels->traverse<cp_binding_level *, poplevel_named_label_1>
667 : 184089 : (current_binding_level);
668 : :
669 : : /* Get the decls in the order they were written.
670 : : Usually current_binding_level->names is in reverse order.
671 : : But parameter decls were previously put in forward order. */
672 : :
673 : 548806383 : decls = current_binding_level->names;
674 : 548806383 : if (reverse)
675 : : {
676 : 294388495 : decls = nreverse (decls);
677 : 294388495 : current_binding_level->names = decls;
678 : : }
679 : :
680 : : /* If there were any declarations or structure tags in that level,
681 : : or if this level is a function body,
682 : : create a BLOCK to record them for the life of this function. */
683 : 548806383 : block = NULL_TREE;
684 : : /* Avoid function body block if possible. */
685 : 582409811 : if (functionbody && subblocks && BLOCK_CHAIN (subblocks) == NULL_TREE)
686 : : keep = 0;
687 : 515203210 : else if (keep == 1 || functionbody)
688 : 169614939 : block = make_node (BLOCK);
689 : 169614939 : if (block != NULL_TREE)
690 : : {
691 : 169614939 : BLOCK_VARS (block) = decls;
692 : 169614939 : BLOCK_SUBBLOCKS (block) = subblocks;
693 : : }
694 : :
695 : : /* In each subblock, record that this is its superior. */
696 : 548806383 : if (keep >= 0)
697 : 615663641 : for (link = subblocks; link; link = BLOCK_CHAIN (link))
698 : 66857258 : BLOCK_SUPERCONTEXT (link) = block;
699 : :
700 : : /* Before we remove the declarations first check for unused variables. */
701 : 548806383 : if ((warn_unused_variable || warn_unused_but_set_variable)
702 : 6133425 : && current_binding_level->kind != sk_template_parms
703 : 5192163 : && !processing_template_decl)
704 : 6131273 : for (tree d = get_local_decls (); d; d = TREE_CHAIN (d))
705 : : {
706 : : /* There are cases where D itself is a TREE_LIST. See in
707 : : push_local_binding where the list of decls returned by
708 : : getdecls is built. */
709 : 3150633 : tree udecl = TREE_CODE (d) == TREE_LIST ? TREE_VALUE (d) : d;
710 : 3150633 : decl = strip_using_decl (udecl);
711 : :
712 : 3150633 : tree type = TREE_TYPE (decl);
713 : 3150633 : if (VAR_P (decl)
714 : 362930 : && (!TREE_USED (decl) || !DECL_READ_P (decl))
715 : 2835 : && !DECL_IN_SYSTEM_HEADER (udecl)
716 : : /* For structured bindings, consider only real variables, not
717 : : subobjects. */
718 : 2823 : && (DECL_DECOMPOSITION_P (decl) ? DECL_DECOMP_IS_BASE (decl)
719 : 2610 : : (DECL_NAME (decl) && !DECL_ARTIFICIAL (decl)))
720 : : /* Don't warn about name-independent declarations. */
721 : 643 : && !name_independent_decl_p (decl)
722 : 499 : && type != error_mark_node
723 : 3153923 : && (!CLASS_TYPE_P (type)
724 : 51 : || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
725 : 3 : || lookup_attribute ("warn_unused",
726 : 3 : TYPE_ATTRIBUTES (TREE_TYPE (decl)))))
727 : : {
728 : 467 : if (!TREE_USED (decl))
729 : : {
730 : 302 : if (TREE_CODE (udecl) == USING_DECL)
731 : 3 : warning_at (DECL_SOURCE_LOCATION (udecl),
732 : : OPT_Wunused_variable,
733 : : "unused using-declaration %qD", udecl);
734 : 299 : else if (!DECL_NAME (decl) && DECL_DECOMPOSITION_P (decl))
735 : 3 : warning_at (DECL_SOURCE_LOCATION (decl),
736 : : OPT_Wunused_variable,
737 : : "unused structured binding declaration");
738 : : else
739 : 296 : warning_at (DECL_SOURCE_LOCATION (decl),
740 : : OPT_Wunused_variable, "unused variable %qD", decl);
741 : 302 : suppress_warning (decl, OPT_Wunused_variable);
742 : : }
743 : 165 : else if (DECL_CONTEXT (decl) == current_function_decl
744 : : // For -Wunused-but-set-variable leave references alone.
745 : 141 : && !TYPE_REF_P (TREE_TYPE (decl))
746 : 306 : && errorcount == unused_but_set_errorcount)
747 : : {
748 : 132 : if (!DECL_NAME (decl) && DECL_DECOMPOSITION_P (decl))
749 : 12 : warning_at (DECL_SOURCE_LOCATION (decl),
750 : : OPT_Wunused_but_set_variable, "structured "
751 : : "binding declaration set but not used");
752 : : else
753 : 120 : warning_at (DECL_SOURCE_LOCATION (decl),
754 : : OPT_Wunused_but_set_variable,
755 : : "variable %qD set but not used", decl);
756 : 132 : unused_but_set_errorcount = errorcount;
757 : : }
758 : : }
759 : : }
760 : :
761 : : /* Remove declarations for all the DECLs in this level. */
762 : 1118851539 : for (link = decls; link; link = TREE_CHAIN (link))
763 : : {
764 : 570045156 : tree name;
765 : 570045156 : if (TREE_CODE (link) == TREE_LIST)
766 : : {
767 : 766865 : decl = TREE_VALUE (link);
768 : 766865 : name = TREE_PURPOSE (link);
769 : 766865 : gcc_checking_assert (name);
770 : : }
771 : : else
772 : : {
773 : 569278291 : decl = link;
774 : 569278291 : name = DECL_NAME (decl);
775 : : }
776 : :
777 : : /* Remove the binding. */
778 : 570045156 : if (TREE_CODE (decl) == LABEL_DECL)
779 : 207 : pop_local_label (name, decl);
780 : : else
781 : 570044949 : pop_local_binding (name, decl);
782 : : }
783 : :
784 : : /* Restore the IDENTIFIER_TYPE_VALUEs. */
785 : 548806383 : for (link = current_binding_level->type_shadowed;
786 : 747353844 : link; link = TREE_CHAIN (link))
787 : 198547461 : SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
788 : :
789 : : /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
790 : : list if a `using' declaration put them there. The debugging
791 : : back ends won't understand OVERLOAD, so we remove them here.
792 : : Because the BLOCK_VARS are (temporarily) shared with
793 : : CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
794 : : popped all the bindings. Also remove undeduced 'auto' decls,
795 : : which LTO doesn't understand, and can't have been used by anything. */
796 : 548806383 : if (block)
797 : : {
798 : 169614939 : tree* d;
799 : :
800 : 444560362 : for (d = &BLOCK_VARS (block); *d; )
801 : : {
802 : 274945423 : if (TREE_CODE (*d) == TREE_LIST
803 : 274945423 : || (!processing_template_decl
804 : 88470178 : && undeduced_auto_decl (*d)))
805 : 766899 : *d = TREE_CHAIN (*d);
806 : : else
807 : 274178524 : d = &DECL_CHAIN (*d);
808 : : }
809 : : }
810 : :
811 : : /* If the level being exited is the top level of a function,
812 : : check over all the labels. */
813 : 548806383 : if (functionbody)
814 : : {
815 : 136360273 : if (block)
816 : : {
817 : : /* Since this is the top level block of a function, the vars are
818 : : the function's parameters. Don't leave them in the BLOCK
819 : : because they are found in the FUNCTION_DECL instead. */
820 : 102757100 : BLOCK_VARS (block) = 0;
821 : 102757100 : pop_labels (block);
822 : : }
823 : : else
824 : 33603173 : pop_labels (subblocks);
825 : : }
826 : :
827 : 548806383 : kind = current_binding_level->kind;
828 : 548806383 : if (kind == sk_cleanup)
829 : : {
830 : 240 : tree stmt;
831 : :
832 : : /* If this is a temporary binding created for a cleanup, then we'll
833 : : have pushed a statement list level. Pop that, create a new
834 : : BIND_EXPR for the block, and insert it into the stream. */
835 : 240 : stmt = pop_stmt_list (current_binding_level->statement_list);
836 : 240 : stmt = c_build_bind_expr (input_location, block, stmt);
837 : 240 : add_stmt (stmt);
838 : : }
839 : :
840 : 548806383 : leave_scope ();
841 : 548806383 : if (functionbody)
842 : : {
843 : : /* The current function is being defined, so its DECL_INITIAL
844 : : should be error_mark_node. */
845 : 136360273 : gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
846 : 169963446 : DECL_INITIAL (current_function_decl) = block ? block : subblocks;
847 : 136360273 : if (subblocks)
848 : : {
849 : 68709519 : if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
850 : : {
851 : 7914148 : if (BLOCK_SUBBLOCKS (subblocks))
852 : 1022347 : BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks)) = 1;
853 : : }
854 : : else
855 : 25689280 : BLOCK_OUTER_CURLY_BRACE_P (subblocks) = 1;
856 : : }
857 : : }
858 : 412446110 : else if (block)
859 : 66857839 : current_binding_level->blocks
860 : 133715678 : = block_chainon (current_binding_level->blocks, block);
861 : :
862 : : /* If we did not make a block for the level just exited,
863 : : any blocks made for inner levels
864 : : (since they cannot be recorded as subblocks in that level)
865 : : must be carried forward so they will later become subblocks
866 : : of something else. */
867 : 345588271 : else if (subblocks)
868 : 9 : current_binding_level->blocks
869 : 18 : = block_chainon (current_binding_level->blocks, subblocks);
870 : :
871 : : /* Each and every BLOCK node created here in `poplevel' is important
872 : : (e.g. for proper debugging information) so if we created one
873 : : earlier, mark it as "used". */
874 : 548806383 : if (block)
875 : 169614939 : TREE_USED (block) = 1;
876 : :
877 : : /* All temporary bindings created for cleanups are popped silently. */
878 : 548806383 : if (kind == sk_cleanup)
879 : 240 : goto restart;
880 : :
881 : 1097612286 : return block;
882 : 548806143 : }
883 : :
884 : : /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
885 : : /* Diagnose odr-used extern inline variables without definitions
886 : : in the current TU. */
887 : :
888 : : int
889 : 137321 : wrapup_namespace_globals ()
890 : : {
891 : 137321 : if (vec<tree, va_gc> *statics = static_decls)
892 : : {
893 : 13984860 : for (tree decl : *statics)
894 : : {
895 : 13871768 : if (warn_unused_function
896 : 978562 : && TREE_CODE (decl) == FUNCTION_DECL
897 : 733711 : && DECL_INITIAL (decl) == 0
898 : 2608 : && DECL_EXTERNAL (decl)
899 : 2608 : && !TREE_PUBLIC (decl)
900 : 19 : && !DECL_ARTIFICIAL (decl)
901 : 19 : && !DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
902 : 13871774 : && !warning_suppressed_p (decl, OPT_Wunused_function))
903 : 6 : warning_at (DECL_SOURCE_LOCATION (decl),
904 : : OPT_Wunused_function,
905 : : "%qF declared %<static%> but never defined", decl);
906 : :
907 : 13871768 : if (VAR_P (decl)
908 : 4139125 : && DECL_EXTERNAL (decl)
909 : 1954289 : && DECL_INLINE_VAR_P (decl)
910 : 13871786 : && DECL_ODR_USED (decl))
911 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
912 : : "odr-used inline variable %qD is not defined", decl);
913 : : }
914 : :
915 : : /* Clear out the list, so we don't rescan next time. */
916 : 113092 : static_decls = NULL;
917 : :
918 : : /* Write out any globals that need to be output. */
919 : 113092 : return wrapup_global_declarations (statics->address (),
920 : 113092 : statics->length ());
921 : : }
922 : : return 0;
923 : : }
924 : :
925 : : /* In C++, you don't have to write `struct S' to refer to `S'; you
926 : : can just use `S'. We accomplish this by creating a TYPE_DECL as
927 : : if the user had written `typedef struct S S'. Create and return
928 : : the TYPE_DECL for TYPE. */
929 : :
930 : : tree
931 : 145014274 : create_implicit_typedef (tree name, tree type)
932 : : {
933 : 145014274 : tree decl;
934 : :
935 : 145014274 : decl = build_decl (input_location, TYPE_DECL, name, type);
936 : 145014274 : DECL_ARTIFICIAL (decl) = 1;
937 : : /* There are other implicit type declarations, like the one *within*
938 : : a class that allows you to write `S::S'. We must distinguish
939 : : amongst these. */
940 : 145014274 : SET_DECL_IMPLICIT_TYPEDEF_P (decl);
941 : 145014274 : TYPE_NAME (type) = decl;
942 : 145014274 : TYPE_STUB_DECL (type) = decl;
943 : :
944 : 145014274 : return decl;
945 : : }
946 : :
947 : : /* Function-scope local entities that need discriminators. Each entry
948 : : is a {decl,name} pair. VAR_DECLs for anon unions get their name
949 : : smashed, so we cannot rely on DECL_NAME. */
950 : :
951 : : static GTY((deletable)) vec<tree, va_gc> *local_entities;
952 : :
953 : : /* Determine the mangling discriminator of local DECL. There are
954 : : generally very few of these in any particular function. */
955 : :
956 : : void
957 : 680626 : determine_local_discriminator (tree decl, tree name)
958 : : {
959 : 680626 : auto_cond_timevar tv (TV_NAME_LOOKUP);
960 : 680626 : retrofit_lang_decl (decl);
961 : 680626 : tree ctx = DECL_CONTEXT (decl);
962 : 680626 : size_t nelts = vec_safe_length (local_entities);
963 : 680626 : if (name == NULL_TREE)
964 : 680503 : name = (TREE_CODE (decl) == TYPE_DECL
965 : 1085335 : && TYPE_UNNAMED_P (TREE_TYPE (decl))
966 : 1219605 : ? NULL_TREE : DECL_NAME (decl));
967 : 19478547 : for (size_t i = 0; i < nelts; i += 2)
968 : : {
969 : 18798276 : tree *pair = &(*local_entities)[i];
970 : 18798276 : tree d = pair[0];
971 : 18798276 : tree n = pair[1];
972 : 18798276 : gcc_checking_assert (d != decl);
973 : 18798276 : if (name == n
974 : 3387650 : && TREE_CODE (decl) == TREE_CODE (d)
975 : 22185917 : && ctx == DECL_CONTEXT (d))
976 : : {
977 : 355 : tree disc = integer_one_node;
978 : 355 : if (DECL_DISCRIMINATOR (d))
979 : 179 : disc = build_int_cst (TREE_TYPE (disc),
980 : 179 : TREE_INT_CST_LOW (DECL_DISCRIMINATOR (d)) + 1);
981 : 355 : DECL_DISCRIMINATOR (decl) = disc;
982 : : /* Replace the saved decl. */
983 : 355 : pair[0] = decl;
984 : 355 : decl = NULL_TREE;
985 : 355 : break;
986 : : }
987 : : }
988 : :
989 : 680626 : if (decl)
990 : : {
991 : 680271 : vec_safe_reserve (local_entities, 2);
992 : 680271 : local_entities->quick_push (decl);
993 : 680271 : local_entities->quick_push (name);
994 : : }
995 : 680626 : }
996 : :
997 : :
998 : : /* True if DECL is a constrained hidden friend as per [temp.friend]/9:
999 : :
1000 : : A non-template friend declaration with a requires-clause shall be a
1001 : : definition. A friend function template with a constraint that depends on a
1002 : : template parameter from an enclosing template shall be a definition. Such a
1003 : : constrained friend function or function template declaration does not
1004 : : declare the same function or function template as a declaration in any other
1005 : : scope.
1006 : :
1007 : : The ABI calls this a "member-like constrained friend" and mangles it like a
1008 : : member function to avoid collisions. */
1009 : :
1010 : : bool
1011 : 1368456917 : member_like_constrained_friend_p (tree decl)
1012 : : {
1013 : 1368456917 : return (TREE_CODE (decl) == FUNCTION_DECL
1014 : 440697433 : && DECL_UNIQUE_FRIEND_P (decl)
1015 : 74456934 : && DECL_FRIEND_CONTEXT (decl)
1016 : 32946045 : && get_constraints (decl)
1017 : 1368765675 : && (!DECL_TEMPLATE_INFO (decl)
1018 : 308758 : || !PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl))
1019 : 2473 : || (uses_outer_template_parms_in_constraints
1020 : 2473 : (most_general_template (decl)))));
1021 : : }
1022 : :
1023 : : /* Returns true if functions FN1 and FN2 have equivalent trailing
1024 : : requires clauses. */
1025 : :
1026 : : static bool
1027 : 23402081 : function_requirements_equivalent_p (tree newfn, tree oldfn)
1028 : : {
1029 : : /* [temp.friend]/9 "Such a constrained friend function does not declare the
1030 : : same function as a declaration in any other scope." So no need to
1031 : : actually compare the requirements. */
1032 : 23402081 : if (member_like_constrained_friend_p (newfn)
1033 : 23402081 : || member_like_constrained_friend_p (oldfn))
1034 : 107 : return false;
1035 : :
1036 : : /* Compare only trailing requirements. */
1037 : 23401974 : tree reqs1 = get_trailing_function_requirements (newfn);
1038 : 23401974 : tree reqs2 = get_trailing_function_requirements (oldfn);
1039 : 23401974 : if ((reqs1 != NULL_TREE) != (reqs2 != NULL_TREE))
1040 : : return false;
1041 : :
1042 : : /* Substitution is needed when friends are involved. */
1043 : 23362090 : reqs1 = maybe_substitute_reqs_for (reqs1, newfn);
1044 : 23362090 : reqs2 = maybe_substitute_reqs_for (reqs2, oldfn);
1045 : :
1046 : 23362090 : return cp_tree_equal (reqs1, reqs2);
1047 : : }
1048 : :
1049 : : /* Two functions of the same name correspond [basic.scope.scope] if
1050 : :
1051 : : + both declare functions with the same non-object-parameter-type-list,
1052 : : equivalent ([temp.over.link]) trailing requires-clauses (if any, except as
1053 : : specified in [temp.friend]), and, if both are non-static members, they have
1054 : : corresponding object parameters, or
1055 : :
1056 : : + both declare function templates with equivalent
1057 : : non-object-parameter-type-lists, return types (if any), template-heads, and
1058 : : trailing requires-clauses (if any), and, if both are non-static members,
1059 : : they have corresponding object parameters.
1060 : :
1061 : : This is a subset of decls_match: it identifies declarations that cannot be
1062 : : overloaded with one another. This function does not consider DECL_NAME. */
1063 : :
1064 : : bool
1065 : 649626911 : fns_correspond (tree newdecl, tree olddecl)
1066 : : {
1067 : 649626911 : if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1068 : : return false;
1069 : :
1070 : 605805945 : if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1071 : : {
1072 : 605781371 : if (!template_heads_equivalent_p (newdecl, olddecl))
1073 : : return 0;
1074 : 140650021 : newdecl = DECL_TEMPLATE_RESULT (newdecl);
1075 : 140650021 : olddecl = DECL_TEMPLATE_RESULT (olddecl);
1076 : : }
1077 : :
1078 : 140674595 : tree f1 = TREE_TYPE (newdecl);
1079 : 140674595 : tree f2 = TREE_TYPE (olddecl);
1080 : :
1081 : 140674595 : int rq1 = type_memfn_rqual (f1);
1082 : 140674595 : int rq2 = type_memfn_rqual (f2);
1083 : :
1084 : : /* If only one is a non-static member function, ignore ref-quals. */
1085 : 140674595 : if (TREE_CODE (f1) != TREE_CODE (f2))
1086 : : rq1 = rq2;
1087 : : /* Two non-static member functions have corresponding object parameters if:
1088 : : + exactly one is an implicit object member function with no ref-qualifier
1089 : : and the types of their object parameters ([dcl.fct]), after removing
1090 : : top-level references, are the same, or
1091 : : + their object parameters have the same type. */
1092 : : /* ??? We treat member functions of different classes as corresponding even
1093 : : though that means the object parameters have different types. */
1094 : 140674595 : else if ((rq1 == REF_QUAL_NONE) != (rq2 == REF_QUAL_NONE))
1095 : 0 : rq1 = rq2;
1096 : :
1097 : 140674595 : bool types_match = rq1 == rq2;
1098 : :
1099 : 140674595 : if (types_match)
1100 : : {
1101 : 140674595 : tree p1 = FUNCTION_FIRST_USER_PARMTYPE (newdecl);
1102 : 140674595 : tree p2 = FUNCTION_FIRST_USER_PARMTYPE (olddecl);
1103 : 140674595 : types_match = compparms (p1, p2);
1104 : : }
1105 : :
1106 : : /* Two function declarations match if either has a requires-clause
1107 : : then both have a requires-clause and their constraints-expressions
1108 : : are equivalent. */
1109 : 140674595 : if (types_match && flag_concepts)
1110 : 17285984 : types_match = function_requirements_equivalent_p (newdecl, olddecl);
1111 : :
1112 : : return types_match;
1113 : : }
1114 : :
1115 : : /* Subroutine of duplicate_decls: return truthvalue of whether
1116 : : or not types of these decls match.
1117 : :
1118 : : For C++, we must compare the parameter list so that `int' can match
1119 : : `int&' in a parameter position, but `int&' is not confused with
1120 : : `const int&'. */
1121 : :
1122 : : int
1123 : 899808629 : decls_match (tree newdecl, tree olddecl, bool record_versions /* = true */)
1124 : : {
1125 : 899808629 : int types_match;
1126 : :
1127 : 899808629 : if (newdecl == olddecl)
1128 : : return 1;
1129 : :
1130 : 899752458 : if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1131 : : /* If the two DECLs are not even the same kind of thing, we're not
1132 : : interested in their types. */
1133 : : return 0;
1134 : :
1135 : 443622738 : gcc_assert (DECL_P (newdecl));
1136 : :
1137 : 443622738 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
1138 : : {
1139 : : /* Specializations of different templates are different functions
1140 : : even if they have the same type. */
1141 : 246940792 : tree t1 = (DECL_USE_TEMPLATE (newdecl)
1142 : 246940792 : ? DECL_TI_TEMPLATE (newdecl)
1143 : 246940792 : : NULL_TREE);
1144 : 246940792 : tree t2 = (DECL_USE_TEMPLATE (olddecl)
1145 : 246940792 : ? DECL_TI_TEMPLATE (olddecl)
1146 : 246940792 : : NULL_TREE);
1147 : 246940792 : if (t1 != t2)
1148 : : return 0;
1149 : :
1150 : 244444400 : if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1151 : 247502687 : && ! (DECL_EXTERN_C_P (newdecl)
1152 : 3058287 : && DECL_EXTERN_C_P (olddecl)))
1153 : : return 0;
1154 : :
1155 : : /* A new declaration doesn't match a built-in one unless it
1156 : : is also extern "C". */
1157 : 225789637 : if (DECL_IS_UNDECLARED_BUILTIN (olddecl)
1158 : 225789637 : && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
1159 : : return 0;
1160 : :
1161 : 225122632 : tree f1 = TREE_TYPE (newdecl);
1162 : 225122632 : tree f2 = TREE_TYPE (olddecl);
1163 : 225122632 : if (TREE_CODE (f1) != TREE_CODE (f2))
1164 : : return 0;
1165 : :
1166 : : /* A declaration with deduced return type should use its pre-deduction
1167 : : type for declaration matching. */
1168 : 224963424 : tree r2 = fndecl_declared_return_type (olddecl);
1169 : 224963424 : tree r1 = fndecl_declared_return_type (newdecl);
1170 : :
1171 : : /* For memchr et al, allow const void* return type (as specified by C++)
1172 : : when we expect void* (as in C). */
1173 : 224963424 : if (DECL_IS_UNDECLARED_BUILTIN (olddecl)
1174 : 6084279 : && DECL_EXTERN_C_P (olddecl)
1175 : 3787582 : && !same_type_p (r1, r2)
1176 : 70 : && TREE_CODE (r1) == POINTER_TYPE
1177 : 15 : && TREE_CODE (r2) == POINTER_TYPE
1178 : 224963436 : && comp_ptr_ttypes (TREE_TYPE (r1), TREE_TYPE (r2)))
1179 : : r2 = r1;
1180 : :
1181 : 224963424 : tree p1 = TYPE_ARG_TYPES (f1);
1182 : 224963424 : tree p2 = TYPE_ARG_TYPES (f2);
1183 : :
1184 : 224963424 : if (same_type_p (r1, r2))
1185 : : {
1186 : 165103247 : if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
1187 : 165103217 : && fndecl_built_in_p (olddecl))
1188 : : {
1189 : 50 : types_match = self_promoting_args_p (p1);
1190 : 50 : if (p1 == void_list_node)
1191 : 3 : TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1192 : : }
1193 : : else
1194 : 165103108 : types_match =
1195 : 165103108 : compparms (p1, p2)
1196 : 25483062 : && type_memfn_rqual (f1) == type_memfn_rqual (f2)
1197 : 190585943 : && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1198 : 1182157 : || comp_type_attributes (TREE_TYPE (newdecl),
1199 : 1182157 : TREE_TYPE (olddecl)) != 0);
1200 : : }
1201 : : else
1202 : : types_match = 0;
1203 : :
1204 : : /* Two function declarations match if either has a requires-clause
1205 : : then both have a requires-clause and their constraints-expressions
1206 : : are equivalent. */
1207 : 25482876 : if (types_match && flag_concepts)
1208 : 6116071 : types_match = function_requirements_equivalent_p (newdecl, olddecl);
1209 : :
1210 : : /* The decls dont match if they correspond to two different versions
1211 : : of the same function. Disallow extern "C" functions to be
1212 : : versions for now. */
1213 : 25482876 : if (types_match
1214 : 25428454 : && !DECL_EXTERN_C_P (newdecl)
1215 : 19755356 : && !DECL_EXTERN_C_P (olddecl)
1216 : 45234538 : && targetm.target_option.function_versions (newdecl, olddecl))
1217 : : {
1218 : 8472 : if (record_versions)
1219 : 16794 : maybe_version_functions (newdecl, olddecl,
1220 : 8397 : (!DECL_FUNCTION_VERSIONED (newdecl)
1221 : 15984 : || !DECL_FUNCTION_VERSIONED (olddecl)));
1222 : 8472 : return 0;
1223 : : }
1224 : : }
1225 : 196681946 : else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1226 : : {
1227 : 195296038 : if (!template_heads_equivalent_p (newdecl, olddecl))
1228 : : return 0;
1229 : :
1230 : 62337388 : tree oldres = DECL_TEMPLATE_RESULT (olddecl);
1231 : 62337388 : tree newres = DECL_TEMPLATE_RESULT (newdecl);
1232 : :
1233 : 62337388 : if (TREE_CODE (newres) != TREE_CODE (oldres))
1234 : : return 0;
1235 : :
1236 : : /* Two template types match if they are the same. Otherwise, compare
1237 : : the underlying declarations. */
1238 : 62337382 : if (TREE_CODE (newres) == TYPE_DECL)
1239 : 30 : types_match = same_type_p (TREE_TYPE (newres), TREE_TYPE (oldres));
1240 : : else
1241 : 62337352 : types_match = decls_match (newres, oldres);
1242 : : }
1243 : : else
1244 : : {
1245 : : /* Need to check scope for variable declaration (VAR_DECL).
1246 : : For typedef (TYPE_DECL), scope is ignored. */
1247 : 1385908 : if (VAR_P (newdecl)
1248 : 923726 : && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1249 : : /* [dcl.link]
1250 : : Two declarations for an object with C language linkage
1251 : : with the same name (ignoring the namespace that qualify
1252 : : it) that appear in different namespace scopes refer to
1253 : : the same object. */
1254 : 1557863 : && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1255 : : return 0;
1256 : :
1257 : 1214001 : if (TREE_TYPE (newdecl) == error_mark_node)
1258 : 0 : types_match = TREE_TYPE (olddecl) == error_mark_node;
1259 : 1214001 : else if (TREE_TYPE (olddecl) == NULL_TREE)
1260 : 0 : types_match = TREE_TYPE (newdecl) == NULL_TREE;
1261 : 1214001 : else if (TREE_TYPE (newdecl) == NULL_TREE)
1262 : : types_match = 0;
1263 : : else
1264 : 1214001 : types_match = comptypes (TREE_TYPE (newdecl),
1265 : 1214001 : TREE_TYPE (olddecl),
1266 : : COMPARE_REDECLARATION);
1267 : : }
1268 : :
1269 : : return types_match;
1270 : : }
1271 : :
1272 : : /* Mark DECL as versioned if it isn't already. */
1273 : :
1274 : : static void
1275 : 16884 : maybe_mark_function_versioned (tree decl)
1276 : : {
1277 : 16884 : if (!DECL_FUNCTION_VERSIONED (decl))
1278 : : {
1279 : 954 : DECL_FUNCTION_VERSIONED (decl) = 1;
1280 : : /* If DECL_ASSEMBLER_NAME has already been set, re-mangle
1281 : : to include the version marker. */
1282 : 954 : if (DECL_ASSEMBLER_NAME_SET_P (decl))
1283 : 33 : mangle_decl (decl);
1284 : : }
1285 : 16884 : }
1286 : :
1287 : : /* NEWDECL and OLDDECL have identical signatures. If they are
1288 : : different versions adjust them and return true.
1289 : : If RECORD is set to true, record function versions. */
1290 : :
1291 : : bool
1292 : 152799 : maybe_version_functions (tree newdecl, tree olddecl, bool record)
1293 : : {
1294 : 152799 : if (!targetm.target_option.function_versions (newdecl, olddecl))
1295 : : return false;
1296 : :
1297 : 8424 : maybe_mark_function_versioned (olddecl);
1298 : 8424 : if (DECL_LOCAL_DECL_P (olddecl))
1299 : : {
1300 : 18 : olddecl = DECL_LOCAL_DECL_ALIAS (olddecl);
1301 : 18 : maybe_mark_function_versioned (olddecl);
1302 : : }
1303 : :
1304 : 8424 : maybe_mark_function_versioned (newdecl);
1305 : 8424 : if (DECL_LOCAL_DECL_P (newdecl))
1306 : : {
1307 : : /* Unfortunately, we can get here before pushdecl naturally calls
1308 : : push_local_extern_decl_alias, so we need to call it directly. */
1309 : 18 : if (!DECL_LOCAL_DECL_ALIAS (newdecl))
1310 : 6 : push_local_extern_decl_alias (newdecl);
1311 : 18 : newdecl = DECL_LOCAL_DECL_ALIAS (newdecl);
1312 : 18 : maybe_mark_function_versioned (newdecl);
1313 : : }
1314 : :
1315 : 8424 : if (record)
1316 : 837 : cgraph_node::record_function_versions (olddecl, newdecl);
1317 : :
1318 : : return true;
1319 : : }
1320 : :
1321 : : /* If NEWDECL is `static' and an `extern' was seen previously,
1322 : : warn about it. OLDDECL is the previous declaration.
1323 : :
1324 : : Note that this does not apply to the C++ case of declaring
1325 : : a variable `extern const' and then later `const'.
1326 : :
1327 : : Don't complain about built-in functions, since they are beyond
1328 : : the user's control. */
1329 : :
1330 : : void
1331 : 17545619 : warn_extern_redeclared_static (tree newdecl, tree olddecl)
1332 : : {
1333 : 17545619 : if (TREE_CODE (newdecl) == TYPE_DECL
1334 : 17521876 : || TREE_CODE (newdecl) == TEMPLATE_DECL
1335 : 14065037 : || TREE_CODE (newdecl) == CONST_DECL
1336 : 14065037 : || TREE_CODE (newdecl) == NAMESPACE_DECL)
1337 : 17545607 : return;
1338 : :
1339 : : /* Don't get confused by static member functions; that's a different
1340 : : use of `static'. */
1341 : 14065037 : if (TREE_CODE (newdecl) == FUNCTION_DECL
1342 : 14065037 : && DECL_STATIC_FUNCTION_P (newdecl))
1343 : : return;
1344 : :
1345 : : /* If the old declaration was `static', or the new one isn't, then
1346 : : everything is OK. */
1347 : 13909537 : if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1348 : : return;
1349 : :
1350 : : /* It's OK to declare a builtin function as `static'. */
1351 : 12 : if (TREE_CODE (olddecl) == FUNCTION_DECL
1352 : 12 : && DECL_ARTIFICIAL (olddecl))
1353 : : return;
1354 : :
1355 : 12 : auto_diagnostic_group d;
1356 : 12 : if (permerror (DECL_SOURCE_LOCATION (newdecl),
1357 : : "%qD was declared %<extern%> and later %<static%>", newdecl))
1358 : 12 : inform (DECL_SOURCE_LOCATION (olddecl),
1359 : : "previous declaration of %qD", olddecl);
1360 : 12 : }
1361 : :
1362 : : /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1363 : : function templates. If their exception specifications do not
1364 : : match, issue a diagnostic. */
1365 : :
1366 : : static void
1367 : 17146386 : check_redeclaration_exception_specification (tree new_decl,
1368 : : tree old_decl)
1369 : : {
1370 : 17146386 : tree new_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl));
1371 : 17146386 : tree old_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl));
1372 : :
1373 : : /* Two default specs are equivalent, don't force evaluation. */
1374 : 5917989 : if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions)
1375 : 17291814 : && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions))
1376 : : return;
1377 : :
1378 : 17136350 : if (!type_dependent_expression_p (old_decl))
1379 : : {
1380 : 9777701 : maybe_instantiate_noexcept (new_decl);
1381 : 9777701 : maybe_instantiate_noexcept (old_decl);
1382 : : }
1383 : 17136350 : new_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl));
1384 : 17136350 : old_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl));
1385 : :
1386 : : /* [except.spec]
1387 : :
1388 : : If any declaration of a function has an exception-specification,
1389 : : all declarations, including the definition and an explicit
1390 : : specialization, of that function shall have an
1391 : : exception-specification with the same set of type-ids. */
1392 : 17136350 : if (!DECL_IS_UNDECLARED_BUILTIN (old_decl)
1393 : 13474766 : && !DECL_IS_UNDECLARED_BUILTIN (new_decl)
1394 : 30611046 : && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1395 : : {
1396 : 326 : const char *const msg
1397 : : = G_("declaration of %qF has a different exception specifier");
1398 : 326 : bool complained = true;
1399 : 326 : location_t new_loc = DECL_SOURCE_LOCATION (new_decl);
1400 : 326 : auto_diagnostic_group d;
1401 : :
1402 : : /* Be permissive about C++98 vs C++11 operator new declarations. */
1403 : 652 : bool global_new = (IDENTIFIER_NEW_OP_P (DECL_NAME (new_decl))
1404 : 1 : && CP_DECL_CONTEXT (new_decl) == global_namespace
1405 : 328 : && (nothrow_spec_p (new_exceptions)
1406 : 1 : == nothrow_spec_p (old_exceptions)));
1407 : :
1408 : 326 : if (DECL_IN_SYSTEM_HEADER (old_decl)
1409 : 326 : && (global_new || DECL_EXTERN_C_P (old_decl)))
1410 : : /* Don't fuss about the C library; the C library functions are not
1411 : : specified to have exception specifications (just behave as if they
1412 : : have them), but some implementations include them. */
1413 : 233 : complained = pedwarn (new_loc, OPT_Wsystem_headers, msg, new_decl);
1414 : 93 : else if (!flag_exceptions)
1415 : : /* We used to silently permit mismatched eh specs with
1416 : : -fno-exceptions, so only complain if -pedantic. */
1417 : 3 : complained = pedwarn (new_loc, OPT_Wpedantic, msg, new_decl);
1418 : 90 : else if (!new_exceptions || global_new)
1419 : : /* Reduce to pedwarn for omitted exception specification. No warning
1420 : : flag for this; silence the warning by correcting the code. */
1421 : 21 : complained = pedwarn (new_loc, 0, msg, new_decl);
1422 : : else
1423 : 69 : error_at (new_loc, msg, new_decl);
1424 : :
1425 : 326 : if (complained)
1426 : 96 : inform (DECL_SOURCE_LOCATION (old_decl),
1427 : : "from previous declaration %qF", old_decl);
1428 : :
1429 : : /* Copy the old exception specification if new_decl has none. Unless the
1430 : : old decl is extern "C", as obscure code might depend on the type of
1431 : : the new declaration (e.g. noexcept-type19.C). */
1432 : 326 : if (!new_exceptions && !DECL_EXTERN_C_P (old_decl))
1433 : 20 : TREE_TYPE (new_decl)
1434 : 40 : = build_exception_variant (TREE_TYPE (new_decl), old_exceptions);
1435 : 326 : }
1436 : : }
1437 : :
1438 : : /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1439 : : Otherwise issue diagnostics. */
1440 : :
1441 : : bool
1442 : 17546100 : validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1443 : : {
1444 : 17546100 : old_decl = STRIP_TEMPLATE (old_decl);
1445 : 17546100 : new_decl = STRIP_TEMPLATE (new_decl);
1446 : 17546100 : if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1447 : 17522333 : || !VAR_OR_FUNCTION_DECL_P (new_decl))
1448 : : return true;
1449 : 17522333 : if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1450 : 17522333 : == DECL_DECLARED_CONSTEXPR_P (new_decl))
1451 : : {
1452 : 17485343 : if (TREE_CODE (old_decl) != FUNCTION_DECL)
1453 : : return true;
1454 : 34293544 : if (DECL_IMMEDIATE_FUNCTION_P (old_decl)
1455 : 17146772 : == DECL_IMMEDIATE_FUNCTION_P (new_decl))
1456 : : return true;
1457 : : }
1458 : 36996 : if (TREE_CODE (old_decl) == FUNCTION_DECL)
1459 : : {
1460 : : /* With -fimplicit-constexpr, ignore changes in the constexpr
1461 : : keyword. */
1462 : 61 : if (flag_implicit_constexpr
1463 : 61 : && (DECL_IMMEDIATE_FUNCTION_P (new_decl)
1464 : 0 : == DECL_IMMEDIATE_FUNCTION_P (old_decl)))
1465 : : return true;
1466 : 61 : if (fndecl_built_in_p (old_decl))
1467 : : {
1468 : : /* Hide a built-in declaration. */
1469 : 0 : DECL_DECLARED_CONSTEXPR_P (old_decl)
1470 : 0 : = DECL_DECLARED_CONSTEXPR_P (new_decl);
1471 : 0 : if (DECL_IMMEDIATE_FUNCTION_P (new_decl))
1472 : 0 : SET_DECL_IMMEDIATE_FUNCTION_P (old_decl);
1473 : 0 : return true;
1474 : : }
1475 : : /* 7.1.5 [dcl.constexpr]
1476 : : Note: An explicit specialization can differ from the template
1477 : : declaration with respect to the constexpr specifier. */
1478 : 61 : if (! DECL_TEMPLATE_SPECIALIZATION (old_decl)
1479 : 61 : && DECL_TEMPLATE_SPECIALIZATION (new_decl))
1480 : : return true;
1481 : :
1482 : 42 : const char *kind = "constexpr";
1483 : 42 : if (DECL_IMMEDIATE_FUNCTION_P (old_decl)
1484 : 72 : || DECL_IMMEDIATE_FUNCTION_P (new_decl))
1485 : : kind = "consteval";
1486 : 42 : auto_diagnostic_group d;
1487 : 42 : error_at (DECL_SOURCE_LOCATION (new_decl),
1488 : : "redeclaration %qD differs in %qs "
1489 : : "from previous declaration", new_decl,
1490 : : kind);
1491 : 42 : inform (DECL_SOURCE_LOCATION (old_decl),
1492 : : "previous declaration %qD", old_decl);
1493 : 42 : return false;
1494 : 42 : }
1495 : : return true;
1496 : : }
1497 : :
1498 : : /* DECL is a redeclaration of a function or function template. If
1499 : : it does have default arguments issue a diagnostic. Note: this
1500 : : function is used to enforce the requirements in C++11 8.3.6 about
1501 : : no default arguments in redeclarations. */
1502 : :
1503 : : static void
1504 : 10890440 : check_redeclaration_no_default_args (tree decl)
1505 : : {
1506 : 10890440 : gcc_assert (DECL_DECLARES_FUNCTION_P (decl));
1507 : :
1508 : 10890440 : for (tree t = FUNCTION_FIRST_USER_PARMTYPE (decl);
1509 : 31995646 : t && t != void_list_node; t = TREE_CHAIN (t))
1510 : 21105260 : if (TREE_PURPOSE (t))
1511 : : {
1512 : 54 : permerror (DECL_SOURCE_LOCATION (decl),
1513 : : "redeclaration of %q#D may not have default "
1514 : : "arguments", decl);
1515 : 54 : return;
1516 : : }
1517 : : }
1518 : :
1519 : : /* NEWDECL is a redeclaration of a function or function template OLDDECL,
1520 : : in any case represented as FUNCTION_DECLs (the DECL_TEMPLATE_RESULTs of
1521 : : the TEMPLATE_DECLs in case of function templates). This function is used
1522 : : to enforce the final part of C++17 11.3.6/4, about a single declaration:
1523 : : "If a friend declaration specifies a default argument expression, that
1524 : : declaration shall be a definition and shall be the only declaration of
1525 : : the function or function template in the translation unit." */
1526 : :
1527 : : static void
1528 : 5449091 : check_no_redeclaration_friend_default_args (tree olddecl, tree newdecl)
1529 : : {
1530 : 10547976 : if (!DECL_UNIQUE_FRIEND_P (olddecl) && !DECL_UNIQUE_FRIEND_P (newdecl))
1531 : : return;
1532 : :
1533 : 1979290 : for (tree t1 = FUNCTION_FIRST_USER_PARMTYPE (olddecl),
1534 : 989645 : t2 = FUNCTION_FIRST_USER_PARMTYPE (newdecl);
1535 : 2660632 : t1 && t1 != void_list_node;
1536 : 1670987 : t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1537 : 2333114 : if ((DECL_UNIQUE_FRIEND_P (olddecl) && TREE_PURPOSE (t1))
1538 : 4589163 : || (DECL_UNIQUE_FRIEND_P (newdecl) && TREE_PURPOSE (t2)))
1539 : : {
1540 : 36 : auto_diagnostic_group d;
1541 : 36 : if (permerror (DECL_SOURCE_LOCATION (newdecl),
1542 : : "friend declaration of %q#D specifies default "
1543 : : "arguments and isn%'t the only declaration", newdecl))
1544 : 36 : inform (DECL_SOURCE_LOCATION (olddecl),
1545 : : "previous declaration of %q#D", olddecl);
1546 : 36 : return;
1547 : 36 : }
1548 : : }
1549 : :
1550 : : /* Merge tree bits that correspond to attributes noreturn, nothrow,
1551 : : const, malloc, and pure from NEWDECL with those of OLDDECL. */
1552 : :
1553 : : static void
1554 : 16588777 : merge_attribute_bits (tree newdecl, tree olddecl)
1555 : : {
1556 : 16588777 : TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1557 : 16588777 : TREE_THIS_VOLATILE (olddecl) |= TREE_THIS_VOLATILE (newdecl);
1558 : 16588777 : TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1559 : 16588777 : TREE_NOTHROW (olddecl) |= TREE_NOTHROW (newdecl);
1560 : 16588777 : TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1561 : 16588777 : TREE_READONLY (olddecl) |= TREE_READONLY (newdecl);
1562 : 16588777 : DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1563 : 16588777 : DECL_IS_MALLOC (olddecl) |= DECL_IS_MALLOC (newdecl);
1564 : 16588777 : DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1565 : 16588777 : DECL_PURE_P (olddecl) |= DECL_PURE_P (newdecl);
1566 : 16588777 : DECL_UNINLINABLE (newdecl) |= DECL_UNINLINABLE (olddecl);
1567 : 16588777 : DECL_UNINLINABLE (olddecl) |= DECL_UNINLINABLE (newdecl);
1568 : 16588777 : TREE_DEPRECATED (newdecl) |= TREE_DEPRECATED (olddecl);
1569 : 16588777 : TREE_DEPRECATED (olddecl) |= TREE_DEPRECATED (newdecl);
1570 : 16588777 : TREE_UNAVAILABLE (newdecl) |= TREE_UNAVAILABLE (olddecl);
1571 : 16588777 : TREE_UNAVAILABLE (olddecl) |= TREE_UNAVAILABLE (newdecl);
1572 : 16588777 : }
1573 : :
1574 : : #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1575 : : && lookup_attribute ("gnu_inline", \
1576 : : DECL_ATTRIBUTES (fn)))
1577 : :
1578 : : /* A subroutine of duplicate_decls. Emits a diagnostic when newdecl
1579 : : ambiguates olddecl. Returns true if an error occurs. */
1580 : :
1581 : : static bool
1582 : 191839133 : duplicate_function_template_decls (tree newdecl, tree olddecl)
1583 : : {
1584 : 191839133 : tree newres = DECL_TEMPLATE_RESULT (newdecl);
1585 : 191839133 : tree oldres = DECL_TEMPLATE_RESULT (olddecl);
1586 : : /* Function template declarations can be differentiated by parameter
1587 : : and return type. */
1588 : 191839133 : if (compparms (TYPE_ARG_TYPES (TREE_TYPE (oldres)),
1589 : 191839133 : TYPE_ARG_TYPES (TREE_TYPE (newres)))
1590 : 191839133 : && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1591 : : TREE_TYPE (TREE_TYPE (olddecl))))
1592 : : {
1593 : : /* ... and also by their template-heads and requires-clauses. */
1594 : 3615 : if (template_heads_equivalent_p (newdecl, olddecl)
1595 : 3615 : && function_requirements_equivalent_p (newres, oldres))
1596 : : {
1597 : 0 : auto_diagnostic_group d;
1598 : 0 : error ("ambiguating new declaration %q+#D", newdecl);
1599 : 0 : inform (DECL_SOURCE_LOCATION (olddecl),
1600 : : "old declaration %q#D", olddecl);
1601 : 0 : return true;
1602 : 0 : }
1603 : :
1604 : : /* FIXME: The types are the same but the are differences
1605 : : in either the template heads or function requirements.
1606 : : We should be able to diagnose a set of common errors
1607 : : stemming from these declarations. For example:
1608 : :
1609 : : template<typename T> requires C void f(...);
1610 : : template<typename T> void f(...) requires C;
1611 : :
1612 : : These are functionally equivalent but not equivalent. */
1613 : : }
1614 : :
1615 : : return false;
1616 : : }
1617 : :
1618 : : /* OLD_PARMS is the innermost set of template parameters for some template
1619 : : declaration, and NEW_PARMS is the corresponding set of template parameters
1620 : : for a redeclaration of that template. Merge the default arguments within
1621 : : these two sets of parameters. CLASS_P is true iff the template in
1622 : : question is a class template. */
1623 : :
1624 : : bool
1625 : 7800809 : merge_default_template_args (tree new_parms, tree old_parms, bool class_p)
1626 : : {
1627 : 7800809 : gcc_checking_assert (TREE_VEC_LENGTH (new_parms)
1628 : : == TREE_VEC_LENGTH (old_parms));
1629 : 22053897 : for (int i = 0; i < TREE_VEC_LENGTH (new_parms); i++)
1630 : : {
1631 : 14253100 : tree new_parm = TREE_VALUE (TREE_VEC_ELT (new_parms, i));
1632 : 14253100 : tree old_parm = TREE_VALUE (TREE_VEC_ELT (old_parms, i));
1633 : 14253100 : tree& new_default = TREE_PURPOSE (TREE_VEC_ELT (new_parms, i));
1634 : 14253100 : tree& old_default = TREE_PURPOSE (TREE_VEC_ELT (old_parms, i));
1635 : 14253100 : if (error_operand_p (new_parm) || error_operand_p (old_parm))
1636 : : return false;
1637 : 14253097 : if (new_default != NULL_TREE && old_default != NULL_TREE)
1638 : : {
1639 : 9 : auto_diagnostic_group d;
1640 : 9 : error ("redefinition of default argument for %q+#D", new_parm);
1641 : 9 : inform (DECL_SOURCE_LOCATION (old_parm),
1642 : : "original definition appeared here");
1643 : 9 : return false;
1644 : 9 : }
1645 : 14253088 : else if (new_default != NULL_TREE)
1646 : : /* Update the previous template parameters (which are the ones
1647 : : that will really count) with the new default value. */
1648 : 190673 : old_default = new_default;
1649 : 14062415 : else if (class_p && old_default != NULL_TREE)
1650 : : /* Update the new parameters, too; they'll be used as the
1651 : : parameters for any members. */
1652 : 963643 : new_default = old_default;
1653 : : }
1654 : : return true;
1655 : : }
1656 : :
1657 : : /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1658 : : If the redeclaration is invalid, a diagnostic is issued, and the
1659 : : error_mark_node is returned. Otherwise, OLDDECL is returned.
1660 : :
1661 : : If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1662 : : returned.
1663 : :
1664 : : HIDING is true if the new decl is being hidden. WAS_HIDDEN is true
1665 : : if the old decl was hidden.
1666 : :
1667 : : Hidden decls can be anticipated builtins, injected friends, or
1668 : : (coming soon) injected from a local-extern decl. */
1669 : :
1670 : : tree
1671 : 324842736 : duplicate_decls (tree newdecl, tree olddecl, bool hiding, bool was_hidden)
1672 : : {
1673 : 324842736 : unsigned olddecl_uid = DECL_UID (olddecl);
1674 : 324842736 : int types_match = 0;
1675 : 324842736 : int new_defines_function = 0;
1676 : 324842736 : tree new_template_info;
1677 : 324842736 : location_t olddecl_loc = DECL_SOURCE_LOCATION (olddecl);
1678 : 324842736 : location_t newdecl_loc = DECL_SOURCE_LOCATION (newdecl);
1679 : :
1680 : 324842736 : if (newdecl == olddecl)
1681 : : return olddecl;
1682 : :
1683 : 324011746 : types_match = decls_match (newdecl, olddecl);
1684 : :
1685 : : /* If either the type of the new decl or the type of the old decl is an
1686 : : error_mark_node, then that implies that we have already issued an
1687 : : error (earlier) for some bogus type specification, and in that case,
1688 : : it is rather pointless to harass the user with yet more error message
1689 : : about the same declaration, so just pretend the types match here. */
1690 : 324011746 : if (TREE_TYPE (newdecl) == error_mark_node
1691 : 324011746 : || TREE_TYPE (olddecl) == error_mark_node)
1692 : : return error_mark_node;
1693 : :
1694 : : /* Check for redeclaration and other discrepancies. */
1695 : 324011723 : if (TREE_CODE (olddecl) == FUNCTION_DECL
1696 : 324011723 : && DECL_IS_UNDECLARED_BUILTIN (olddecl))
1697 : : {
1698 : 5950203 : if (TREE_CODE (newdecl) != FUNCTION_DECL)
1699 : : {
1700 : : /* Avoid warnings redeclaring built-ins which have not been
1701 : : explicitly declared. */
1702 : 179986 : if (was_hidden)
1703 : : {
1704 : 179958 : if (TREE_PUBLIC (newdecl)
1705 : 179958 : && CP_DECL_CONTEXT (newdecl) == global_namespace)
1706 : 12 : warning_at (newdecl_loc,
1707 : : OPT_Wbuiltin_declaration_mismatch,
1708 : : "built-in function %qD declared as non-function",
1709 : : newdecl);
1710 : 179958 : return NULL_TREE;
1711 : : }
1712 : :
1713 : : /* If you declare a built-in or predefined function name as static,
1714 : : the old definition is overridden, but optionally warn this was a
1715 : : bad choice of name. */
1716 : 28 : if (! TREE_PUBLIC (newdecl))
1717 : : {
1718 : 56 : warning_at (newdecl_loc,
1719 : : OPT_Wshadow,
1720 : 28 : fndecl_built_in_p (olddecl)
1721 : : ? G_("shadowing built-in function %q#D")
1722 : : : G_("shadowing library function %q#D"), olddecl);
1723 : : /* Discard the old built-in function. */
1724 : 28 : return NULL_TREE;
1725 : : }
1726 : : /* If the built-in is not ansi, then programs can override
1727 : : it even globally without an error. */
1728 : 0 : else if (! fndecl_built_in_p (olddecl))
1729 : 0 : warning_at (newdecl_loc, 0,
1730 : : "library function %q#D redeclared as non-function %q#D",
1731 : : olddecl, newdecl);
1732 : : else
1733 : 0 : error_at (newdecl_loc,
1734 : : "declaration of %q#D conflicts with built-in "
1735 : : "declaration %q#D", newdecl, olddecl);
1736 : 0 : return NULL_TREE;
1737 : : }
1738 : 5770217 : else if (!types_match)
1739 : : {
1740 : : /* Avoid warnings redeclaring built-ins which have not been
1741 : : explicitly declared. */
1742 : 2108633 : if (was_hidden)
1743 : : {
1744 : 805064 : tree t1, t2;
1745 : :
1746 : : /* A new declaration doesn't match a built-in one unless it
1747 : : is also extern "C". */
1748 : 805064 : gcc_assert (DECL_IS_UNDECLARED_BUILTIN (olddecl));
1749 : 805064 : gcc_assert (DECL_EXTERN_C_P (olddecl));
1750 : 805064 : if (!DECL_EXTERN_C_P (newdecl))
1751 : : return NULL_TREE;
1752 : :
1753 : 138059 : for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1754 : 138059 : t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1755 : 236680 : t1 || t2;
1756 : 98621 : t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1757 : : {
1758 : 236662 : if (!t1 || !t2)
1759 : : break;
1760 : : /* FILE, tm types are not known at the time
1761 : : we create the builtins. */
1762 : 735476 : for (unsigned i = 0;
1763 : 971976 : i < sizeof (builtin_structptr_types)
1764 : : / sizeof (builtin_structptr_type);
1765 : : ++i)
1766 : 873349 : if (TREE_VALUE (t2) == builtin_structptr_types[i].node)
1767 : : {
1768 : 137873 : tree t = TREE_VALUE (t1);
1769 : :
1770 : 137873 : if (TYPE_PTR_P (t)
1771 : 275746 : && TYPE_IDENTIFIER (TREE_TYPE (t))
1772 : 137873 : == get_identifier (builtin_structptr_types[i].str)
1773 : 275731 : && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1774 : : {
1775 : 137858 : tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1776 : :
1777 : 137858 : TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1778 : 137858 : = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1779 : 137858 : types_match = decls_match (newdecl, olddecl);
1780 : 137858 : if (types_match)
1781 : 137858 : return duplicate_decls (newdecl, olddecl,
1782 : 137858 : hiding, was_hidden);
1783 : 0 : TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1784 : : }
1785 : 15 : goto next_arg;
1786 : : }
1787 : :
1788 : 98627 : if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1789 : : break;
1790 : 98621 : next_arg:;
1791 : : }
1792 : :
1793 : 201 : warning_at (newdecl_loc,
1794 : : OPT_Wbuiltin_declaration_mismatch,
1795 : : "declaration of %q#D conflicts with built-in "
1796 : : "declaration %q#D", newdecl, olddecl);
1797 : : }
1798 : 1303569 : else if ((DECL_EXTERN_C_P (newdecl)
1799 : 15 : && DECL_EXTERN_C_P (olddecl))
1800 : 2607123 : || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1801 : 1303554 : TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1802 : : {
1803 : : /* Don't really override olddecl for __* prefixed builtins
1804 : : except for __[^b]*_chk, the compiler might be using those
1805 : : explicitly. */
1806 : 15 : if (fndecl_built_in_p (olddecl))
1807 : : {
1808 : 15 : tree id = DECL_NAME (olddecl);
1809 : 15 : const char *name = IDENTIFIER_POINTER (id);
1810 : 15 : size_t len;
1811 : :
1812 : 15 : if (name[0] == '_'
1813 : 15 : && name[1] == '_'
1814 : 30 : && (startswith (name + 2, "builtin_")
1815 : 6 : || (len = strlen (name)) <= strlen ("___chk")
1816 : 6 : || memcmp (name + len - strlen ("_chk"),
1817 : : "_chk", strlen ("_chk") + 1) != 0))
1818 : : {
1819 : 15 : if (DECL_INITIAL (newdecl))
1820 : : {
1821 : 6 : error_at (newdecl_loc,
1822 : : "definition of %q#D ambiguates built-in "
1823 : : "declaration %q#D", newdecl, olddecl);
1824 : 6 : return error_mark_node;
1825 : : }
1826 : 9 : auto_diagnostic_group d;
1827 : 9 : if (permerror (newdecl_loc,
1828 : : "new declaration %q#D ambiguates built-in"
1829 : : " declaration %q#D", newdecl, olddecl)
1830 : 9 : && flag_permissive)
1831 : 3 : inform (newdecl_loc,
1832 : : "ignoring the %q#D declaration", newdecl);
1833 : 9 : return flag_permissive ? olddecl : error_mark_node;
1834 : 9 : }
1835 : : }
1836 : :
1837 : : /* A near match; override the builtin. */
1838 : :
1839 : 0 : if (TREE_PUBLIC (newdecl))
1840 : 0 : warning_at (newdecl_loc,
1841 : : OPT_Wbuiltin_declaration_mismatch,
1842 : : "new declaration %q#D ambiguates built-in "
1843 : : "declaration %q#D", newdecl, olddecl);
1844 : : else
1845 : 0 : warning (OPT_Wshadow,
1846 : : fndecl_built_in_p (olddecl)
1847 : : ? G_("shadowing built-in function %q#D")
1848 : : : G_("shadowing library function %q#D"), olddecl);
1849 : : }
1850 : : else
1851 : : /* Discard the old built-in function. */
1852 : : return NULL_TREE;
1853 : :
1854 : : /* Replace the old RTL to avoid problems with inlining. */
1855 : 201 : COPY_DECL_RTL (newdecl, olddecl);
1856 : : }
1857 : : else
1858 : : {
1859 : : /* Even if the types match, prefer the new declarations type
1860 : : for built-ins which have not been explicitly declared,
1861 : : for exception lists, etc... */
1862 : 3661584 : tree type = TREE_TYPE (newdecl);
1863 : 3661584 : tree attribs = (*targetm.merge_type_attributes)
1864 : 3661584 : (TREE_TYPE (olddecl), type);
1865 : :
1866 : 3661584 : type = cp_build_type_attribute_variant (type, attribs);
1867 : 3661584 : TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1868 : : }
1869 : :
1870 : : /* If a function is explicitly declared "throw ()", propagate that to
1871 : : the corresponding builtin. */
1872 : 3661785 : if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1873 : 3511586 : && was_hidden
1874 : 3511543 : && TREE_NOTHROW (newdecl)
1875 : 6924398 : && !TREE_NOTHROW (olddecl))
1876 : : {
1877 : 28288 : enum built_in_function fncode = DECL_FUNCTION_CODE (olddecl);
1878 : 28288 : tree tmpdecl = builtin_decl_explicit (fncode);
1879 : 28288 : if (tmpdecl && tmpdecl != olddecl && types_match)
1880 : 28288 : TREE_NOTHROW (tmpdecl) = 1;
1881 : : }
1882 : :
1883 : : /* Whether or not the builtin can throw exceptions has no
1884 : : bearing on this declarator. */
1885 : 3661785 : TREE_NOTHROW (olddecl) = 0;
1886 : :
1887 : 3661785 : if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1888 : : {
1889 : : /* If a builtin function is redeclared as `static', merge
1890 : : the declarations, but make the original one static. */
1891 : 3 : DECL_THIS_STATIC (olddecl) = 1;
1892 : 3 : TREE_PUBLIC (olddecl) = 0;
1893 : :
1894 : : /* Make the old declaration consistent with the new one so
1895 : : that all remnants of the builtin-ness of this function
1896 : : will be banished. */
1897 : 3 : SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1898 : 3 : COPY_DECL_RTL (newdecl, olddecl);
1899 : : }
1900 : : }
1901 : 318061520 : else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1902 : : {
1903 : : /* C++ Standard, 3.3, clause 4:
1904 : : "[Note: a namespace name or a class template name must be unique
1905 : : in its declarative region (7.3.2, clause 14). ]" */
1906 : 78915100 : if (TREE_CODE (olddecl) == NAMESPACE_DECL
1907 : 78915079 : || TREE_CODE (newdecl) == NAMESPACE_DECL)
1908 : : /* Namespace conflicts with not namespace. */;
1909 : 45645976 : else if (DECL_TYPE_TEMPLATE_P (olddecl)
1910 : 124561043 : || DECL_TYPE_TEMPLATE_P (newdecl))
1911 : : /* Class template conflicts. */;
1912 : 78915061 : else if ((TREE_CODE (olddecl) == TEMPLATE_DECL
1913 : 45645976 : && DECL_TEMPLATE_RESULT (olddecl)
1914 : 45645976 : && TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == VAR_DECL)
1915 : 124561031 : || (TREE_CODE (newdecl) == TEMPLATE_DECL
1916 : 33227475 : && DECL_TEMPLATE_RESULT (newdecl)
1917 : 33227475 : && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == VAR_DECL))
1918 : : /* Variable template conflicts. */;
1919 : 78915052 : else if (concept_definition_p (olddecl)
1920 : 157830098 : || concept_definition_p (newdecl))
1921 : : /* Concept conflicts. */;
1922 : 78915040 : else if ((TREE_CODE (newdecl) == FUNCTION_DECL
1923 : 45685041 : && DECL_FUNCTION_TEMPLATE_P (olddecl))
1924 : 78954117 : || (TREE_CODE (olddecl) == FUNCTION_DECL
1925 : 33227482 : && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1926 : : {
1927 : : /* One is a function and the other is a template
1928 : : function. */
1929 : 78873415 : if (!UDLIT_OPER_P (DECL_NAME (newdecl)))
1930 : : return NULL_TREE;
1931 : :
1932 : : /* There can only be one! */
1933 : 58201 : auto_diagnostic_group d;
1934 : 58201 : if (TREE_CODE (newdecl) == TEMPLATE_DECL
1935 : 58201 : && check_raw_literal_operator (olddecl))
1936 : 3 : error_at (newdecl_loc,
1937 : : "literal operator %q#D conflicts with"
1938 : : " raw literal operator", newdecl);
1939 : 58198 : else if (check_raw_literal_operator (newdecl))
1940 : 3 : error_at (newdecl_loc,
1941 : : "raw literal operator %q#D conflicts with"
1942 : : " literal operator template", newdecl);
1943 : : else
1944 : : return NULL_TREE;
1945 : :
1946 : 6 : inform (olddecl_loc, "previous declaration %q#D", olddecl);
1947 : 6 : return error_mark_node;
1948 : 58201 : }
1949 : 41625 : else if (DECL_DECOMPOSITION_P (olddecl) || DECL_DECOMPOSITION_P (newdecl))
1950 : : /* A structured binding must be unique in its declarative region. */;
1951 : 39215 : else if (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1952 : 41622 : || DECL_IMPLICIT_TYPEDEF_P (newdecl))
1953 : : /* One is an implicit typedef, that's ok. */
1954 : : return NULL_TREE;
1955 : :
1956 : 147 : auto_diagnostic_group d;
1957 : 147 : error ("%q#D redeclared as different kind of entity", newdecl);
1958 : 147 : inform (olddecl_loc, "previous declaration %q#D", olddecl);
1959 : :
1960 : 147 : return error_mark_node;
1961 : 147 : }
1962 : 239146420 : else if (!types_match)
1963 : : {
1964 : 225231760 : if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1965 : : /* These are certainly not duplicate declarations; they're
1966 : : from different scopes. */
1967 : : return NULL_TREE;
1968 : :
1969 : 225231700 : if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1970 : : {
1971 : 191839151 : tree oldres = DECL_TEMPLATE_RESULT (olddecl);
1972 : 191839151 : tree newres = DECL_TEMPLATE_RESULT (newdecl);
1973 : :
1974 : : /* The name of a class template may not be declared to refer to
1975 : : any other template, class, function, object, namespace, value,
1976 : : or type in the same scope. */
1977 : 191839151 : if (TREE_CODE (oldres) == TYPE_DECL
1978 : 191839145 : || TREE_CODE (newres) == TYPE_DECL)
1979 : : {
1980 : 9 : auto_diagnostic_group d;
1981 : 9 : error_at (newdecl_loc,
1982 : : "conflicting declaration of template %q#D", newdecl);
1983 : 9 : inform (olddecl_loc,
1984 : : "previous declaration %q#D", olddecl);
1985 : 9 : return error_mark_node;
1986 : 9 : }
1987 : :
1988 : 191839142 : else if (TREE_CODE (oldres) == FUNCTION_DECL
1989 : 191839133 : && TREE_CODE (newres) == FUNCTION_DECL)
1990 : : {
1991 : 191839133 : if (duplicate_function_template_decls (newdecl, olddecl))
1992 : 0 : return error_mark_node;
1993 : : return NULL_TREE;
1994 : : }
1995 : : return NULL_TREE;
1996 : : }
1997 : 33392549 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
1998 : : {
1999 : 33392438 : if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
2000 : : {
2001 : 57 : auto_diagnostic_group d;
2002 : 57 : error_at (newdecl_loc,
2003 : : "conflicting declaration of C function %q#D",
2004 : : newdecl);
2005 : 57 : inform (olddecl_loc,
2006 : : "previous declaration %q#D", olddecl);
2007 : 57 : return error_mark_node;
2008 : 57 : }
2009 : : /* For function versions, params and types match, but they
2010 : : are not ambiguous. */
2011 : 33392381 : else if ((!DECL_FUNCTION_VERSIONED (newdecl)
2012 : 33384533 : && !DECL_FUNCTION_VERSIONED (olddecl))
2013 : : /* Let constrained hidden friends coexist for now, we'll
2014 : : check satisfaction later. */
2015 : 33384533 : && !member_like_constrained_friend_p (newdecl)
2016 : 33183275 : && !member_like_constrained_friend_p (olddecl)
2017 : : // The functions have the same parameter types.
2018 : 33152455 : && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
2019 : 33152455 : TYPE_ARG_TYPES (TREE_TYPE (olddecl)))
2020 : : // And the same constraints.
2021 : 33392444 : && equivalently_constrained (newdecl, olddecl))
2022 : : {
2023 : 63 : auto_diagnostic_group d;
2024 : 63 : error_at (newdecl_loc,
2025 : : "ambiguating new declaration of %q#D", newdecl);
2026 : 63 : inform (olddecl_loc,
2027 : : "old declaration %q#D", olddecl);
2028 : 63 : return error_mark_node;
2029 : 63 : }
2030 : : else
2031 : 33392318 : return NULL_TREE;
2032 : : }
2033 : : else
2034 : : {
2035 : 111 : auto_diagnostic_group d;
2036 : 111 : error_at (newdecl_loc, "conflicting declaration %q#D", newdecl);
2037 : 111 : inform (olddecl_loc,
2038 : : "previous declaration as %q#D", olddecl);
2039 : 111 : return error_mark_node;
2040 : 111 : }
2041 : : }
2042 : 13914660 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2043 : 13914660 : && DECL_OMP_DECLARE_REDUCTION_P (newdecl))
2044 : : {
2045 : : /* OMP UDRs are never duplicates. */
2046 : 27 : gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (olddecl));
2047 : 27 : auto_diagnostic_group d;
2048 : 27 : error_at (newdecl_loc,
2049 : : "redeclaration of %<pragma omp declare reduction%>");
2050 : 27 : inform (olddecl_loc,
2051 : : "previous %<pragma omp declare reduction%> declaration");
2052 : 27 : return error_mark_node;
2053 : 27 : }
2054 : 13914633 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2055 : 13914633 : && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
2056 : 220 : && (!DECL_TEMPLATE_INFO (newdecl)
2057 : 220 : || (DECL_TI_TEMPLATE (newdecl)
2058 : 220 : != DECL_TI_TEMPLATE (olddecl))))
2059 : 10028302 : || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
2060 : 557868 : && (!DECL_TEMPLATE_INFO (olddecl)
2061 : 557868 : || (DECL_TI_TEMPLATE (olddecl)
2062 : 557868 : != DECL_TI_TEMPLATE (newdecl))))))
2063 : : /* It's OK to have a template specialization and a non-template
2064 : : with the same type, or to have specializations of two
2065 : : different templates with the same type. Note that if one is a
2066 : : specialization, and the other is an instantiation of the same
2067 : : template, that we do not exit at this point. That situation
2068 : : can occur if we instantiate a template class, and then
2069 : : specialize one of its methods. This situation is valid, but
2070 : : the declarations must be merged in the usual way. */
2071 : : return NULL_TREE;
2072 : 13914633 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2073 : 13914633 : && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
2074 : 557708 : && !DECL_USE_TEMPLATE (newdecl))
2075 : 10028302 : || (DECL_TEMPLATE_INSTANTIATION (newdecl)
2076 : 60 : && !DECL_USE_TEMPLATE (olddecl))))
2077 : : /* One of the declarations is a template instantiation, and the
2078 : : other is not a template at all. That's OK. */
2079 : : return NULL_TREE;
2080 : 13914633 : else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2081 : : {
2082 : : /* In [namespace.alias] we have:
2083 : :
2084 : : In a declarative region, a namespace-alias-definition can be
2085 : : used to redefine a namespace-alias declared in that declarative
2086 : : region to refer only to the namespace to which it already
2087 : : refers.
2088 : :
2089 : : Therefore, if we encounter a second alias directive for the same
2090 : : alias, we can just ignore the second directive. */
2091 : 21 : if (DECL_NAMESPACE_ALIAS (newdecl)
2092 : 21 : && (DECL_NAMESPACE_ALIAS (newdecl)
2093 : 18 : == DECL_NAMESPACE_ALIAS (olddecl)))
2094 : : return olddecl;
2095 : :
2096 : : /* Leave it to update_binding to merge or report error. */
2097 : : return NULL_TREE;
2098 : : }
2099 : : else
2100 : : {
2101 : 13914612 : const char *errmsg = redeclaration_error_message (newdecl, olddecl);
2102 : 13914612 : if (errmsg)
2103 : : {
2104 : 526 : auto_diagnostic_group d;
2105 : 526 : error_at (newdecl_loc, errmsg, newdecl);
2106 : 526 : if (DECL_NAME (olddecl) != NULL_TREE)
2107 : 526 : inform (olddecl_loc,
2108 : 526 : (DECL_INITIAL (olddecl) && namespace_bindings_p ())
2109 : : ? G_("%q#D previously defined here")
2110 : : : G_("%q#D previously declared here"), olddecl);
2111 : 526 : if (cxx_dialect >= cxx26
2112 : 139 : && DECL_NAME (newdecl)
2113 : 139 : && id_equal (DECL_NAME (newdecl), "_")
2114 : 539 : && !name_independent_decl_p (newdecl))
2115 : : {
2116 : 13 : if (TREE_CODE (newdecl) == PARM_DECL)
2117 : 2 : inform (newdecl_loc,
2118 : : "parameter declaration is not name-independent");
2119 : 11 : else if (DECL_DECOMPOSITION_P (newdecl))
2120 : : {
2121 : 3 : if (at_namespace_scope_p ())
2122 : 2 : inform (newdecl_loc,
2123 : : "structured binding at namespace scope is not "
2124 : : "name-independent");
2125 : 1 : else if (TREE_STATIC (newdecl))
2126 : 1 : inform (newdecl_loc,
2127 : : "static structured binding is not "
2128 : : "name-independent");
2129 : 0 : else if (DECL_EXTERNAL (newdecl))
2130 : 0 : inform (newdecl_loc,
2131 : : "extern structured binding is not "
2132 : : "name-independent");
2133 : : }
2134 : 8 : else if (at_class_scope_p ()
2135 : : && VAR_P (newdecl)
2136 : 8 : && TREE_STATIC (newdecl))
2137 : 0 : inform (newdecl_loc,
2138 : : "static data member is not name-independent");
2139 : 8 : else if (VAR_P (newdecl) && at_namespace_scope_p ())
2140 : 3 : inform (newdecl_loc,
2141 : : "variable at namespace scope is not name-independent");
2142 : 5 : else if (VAR_P (newdecl) && TREE_STATIC (newdecl))
2143 : 3 : inform (newdecl_loc,
2144 : : "static variable is not name-independent");
2145 : 2 : else if (VAR_P (newdecl) && DECL_EXTERNAL (newdecl))
2146 : 0 : inform (newdecl_loc,
2147 : : "extern variable is not name-independent");
2148 : : }
2149 : 526 : return error_mark_node;
2150 : 526 : }
2151 : 13914086 : else if (TREE_CODE (olddecl) == FUNCTION_DECL
2152 : 10028062 : && DECL_INITIAL (olddecl) != NULL_TREE
2153 : 11514 : && !prototype_p (TREE_TYPE (olddecl))
2154 : 13914086 : && prototype_p (TREE_TYPE (newdecl)))
2155 : : {
2156 : : /* Prototype decl follows defn w/o prototype. */
2157 : 0 : auto_diagnostic_group d;
2158 : 0 : if (warning_at (newdecl_loc, 0,
2159 : : "prototype specified for %q#D", newdecl))
2160 : 0 : inform (olddecl_loc,
2161 : : "previous non-prototype definition here");
2162 : 0 : }
2163 : 13538851 : else if (VAR_OR_FUNCTION_DECL_P (olddecl)
2164 : 23942148 : && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
2165 : : {
2166 : : /* [dcl.link]
2167 : : If two declarations of the same function or object
2168 : : specify different linkage-specifications ..., the program
2169 : : is ill-formed.... Except for functions with C++ linkage,
2170 : : a function declaration without a linkage specification
2171 : : shall not precede the first linkage specification for
2172 : : that function. A function can be declared without a
2173 : : linkage specification after an explicit linkage
2174 : : specification has been seen; the linkage explicitly
2175 : : specified in the earlier declaration is not affected by
2176 : : such a function declaration.
2177 : :
2178 : : DR 563 raises the question why the restrictions on
2179 : : functions should not also apply to objects. Older
2180 : : versions of G++ silently ignore the linkage-specification
2181 : : for this example:
2182 : :
2183 : : namespace N {
2184 : : extern int i;
2185 : : extern "C" int i;
2186 : : }
2187 : :
2188 : : which is clearly wrong. Therefore, we now treat objects
2189 : : like functions. */
2190 : 1732 : if (current_lang_depth () == 0)
2191 : : {
2192 : : /* There is no explicit linkage-specification, so we use
2193 : : the linkage from the previous declaration. */
2194 : 1726 : retrofit_lang_decl (newdecl);
2195 : 1726 : SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2196 : : }
2197 : : else
2198 : : {
2199 : 6 : auto_diagnostic_group d;
2200 : 6 : error_at (newdecl_loc,
2201 : : "conflicting declaration of %q#D with %qL linkage",
2202 : 6 : newdecl, DECL_LANGUAGE (newdecl));
2203 : 6 : inform (olddecl_loc,
2204 : : "previous declaration with %qL linkage",
2205 : 6 : DECL_LANGUAGE (olddecl));
2206 : 6 : }
2207 : : }
2208 : :
2209 : 13914086 : if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
2210 : : ;
2211 : 13335568 : else if (TREE_CODE (olddecl) == FUNCTION_DECL)
2212 : : {
2213 : : /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
2214 : 11076686 : if (DECL_FUNCTION_MEMBER_P (olddecl)
2215 : 9470143 : && (/* grokfndecl passes member function templates too
2216 : : as FUNCTION_DECLs. */
2217 : 8018975 : DECL_TEMPLATE_INFO (olddecl)
2218 : : /* C++11 8.3.6/6.
2219 : : Default arguments for a member function of a class
2220 : : template shall be specified on the initial declaration
2221 : : of the member function within the class template. */
2222 : 641351 : || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl))))
2223 : : {
2224 : 7455746 : check_redeclaration_no_default_args (newdecl);
2225 : :
2226 : 7455746 : if (DECL_TEMPLATE_INFO (olddecl)
2227 : 7455746 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (olddecl)))
2228 : : {
2229 : 2088817 : tree new_parms = DECL_TEMPLATE_INFO (newdecl)
2230 : 2088817 : ? DECL_INNERMOST_TEMPLATE_PARMS (DECL_TI_TEMPLATE (newdecl))
2231 : 2088817 : : INNERMOST_TEMPLATE_PARMS (current_template_parms);
2232 : 2088817 : tree old_parms
2233 : 2088817 : = DECL_INNERMOST_TEMPLATE_PARMS (DECL_TI_TEMPLATE (olddecl));
2234 : 2088817 : merge_default_template_args (new_parms, old_parms,
2235 : : /*class_p=*/false);
2236 : : }
2237 : : }
2238 : : else
2239 : : {
2240 : 2014397 : tree t1 = FUNCTION_FIRST_USER_PARMTYPE (olddecl);
2241 : 2014397 : tree t2 = FUNCTION_FIRST_USER_PARMTYPE (newdecl);
2242 : 2014397 : int i = 1;
2243 : :
2244 : 5432026 : for (; t1 && t1 != void_list_node;
2245 : 3417629 : t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
2246 : 3419296 : if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
2247 : : {
2248 : 39 : if (simple_cst_equal (TREE_PURPOSE (t1),
2249 : 39 : TREE_PURPOSE (t2)) == 1)
2250 : : {
2251 : 12 : auto_diagnostic_group d;
2252 : 12 : if (permerror (newdecl_loc,
2253 : : "default argument given for parameter "
2254 : : "%d of %q#D", i, newdecl))
2255 : 12 : inform (olddecl_loc,
2256 : : "previous specification in %q#D here",
2257 : : olddecl);
2258 : 12 : }
2259 : : else
2260 : : {
2261 : 27 : auto_diagnostic_group d;
2262 : 27 : error_at (newdecl_loc,
2263 : : "default argument given for parameter %d "
2264 : : "of %q#D", i, newdecl);
2265 : 27 : inform (olddecl_loc,
2266 : : "previous specification in %q#D here",
2267 : : olddecl);
2268 : 27 : }
2269 : : }
2270 : :
2271 : : /* C++17 11.3.6/4: "If a friend declaration specifies a default
2272 : : argument expression, that declaration... shall be the only
2273 : : declaration of the function or function template in the
2274 : : translation unit." */
2275 : 2014397 : check_no_redeclaration_friend_default_args (olddecl, newdecl);
2276 : : }
2277 : : }
2278 : : }
2279 : :
2280 : : /* Do not merge an implicit typedef with an explicit one. In:
2281 : :
2282 : : class A;
2283 : : ...
2284 : : typedef class A A __attribute__ ((foo));
2285 : :
2286 : : the attribute should apply only to the typedef. */
2287 : 17575871 : if (TREE_CODE (olddecl) == TYPE_DECL
2288 : 17575871 : && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
2289 : 23746 : || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
2290 : : return NULL_TREE;
2291 : :
2292 : 17545685 : if (DECL_TEMPLATE_PARM_P (olddecl) != DECL_TEMPLATE_PARM_P (newdecl))
2293 : : return NULL_TREE;
2294 : :
2295 : 17545673 : if (!validate_constexpr_redeclaration (olddecl, newdecl))
2296 : 30 : return error_mark_node;
2297 : :
2298 : 17545643 : if (modules_p ()
2299 : 39641 : && TREE_CODE (CP_DECL_CONTEXT (olddecl)) == NAMESPACE_DECL
2300 : 17568671 : && TREE_CODE (olddecl) != NAMESPACE_DECL)
2301 : : {
2302 : 23028 : if (!module_may_redeclare (olddecl, newdecl))
2303 : 24 : return error_mark_node;
2304 : :
2305 : 23004 : if (!hiding)
2306 : : {
2307 : : /* The old declaration should match the exportingness of the new
2308 : : declaration. But hidden friend declarations just keep the
2309 : : exportingness of the old declaration; see CWG2588. */
2310 : 20634 : tree not_tmpl = STRIP_TEMPLATE (olddecl);
2311 : 20634 : if (DECL_LANG_SPECIFIC (not_tmpl)
2312 : 20592 : && DECL_MODULE_ATTACH_P (not_tmpl)
2313 : : /* Typedefs are not entities and so are OK to be redeclared
2314 : : as exported: see [module.interface]/p6. */
2315 : 20847 : && TREE_CODE (olddecl) != TYPE_DECL)
2316 : : {
2317 : 201 : if (DECL_MODULE_EXPORT_P (newdecl)
2318 : 201 : && !DECL_MODULE_EXPORT_P (not_tmpl))
2319 : : {
2320 : 15 : auto_diagnostic_group d;
2321 : 15 : error ("conflicting exporting for declaration %qD", newdecl);
2322 : 15 : inform (olddecl_loc,
2323 : : "previously declared here without exporting");
2324 : 15 : }
2325 : : }
2326 : 20433 : else if (DECL_MODULE_EXPORT_P (newdecl))
2327 : 8499 : DECL_MODULE_EXPORT_P (not_tmpl) = true;
2328 : : }
2329 : : }
2330 : :
2331 : : /* We have committed to returning OLDDECL at this point. */
2332 : :
2333 : : /* If new decl is `static' and an `extern' was seen previously,
2334 : : warn about it. */
2335 : 17545619 : warn_extern_redeclared_static (newdecl, olddecl);
2336 : :
2337 : : /* True to merge attributes between the declarations, false to
2338 : : set OLDDECL's attributes to those of NEWDECL (for template
2339 : : explicit specializations that specify their own attributes
2340 : : independent of those specified for the primary template). */
2341 : 17545619 : const bool merge_attr = (TREE_CODE (newdecl) != FUNCTION_DECL
2342 : 13689802 : || !DECL_TEMPLATE_SPECIALIZATION (newdecl)
2343 : 18103472 : || DECL_TEMPLATE_SPECIALIZATION (olddecl));
2344 : :
2345 : 17545619 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2346 : : {
2347 : 13689802 : if (merge_attr)
2348 : : {
2349 : 13132154 : {
2350 : 13132154 : auto_diagnostic_group d;
2351 : 13132154 : if (diagnose_mismatched_attributes (olddecl, newdecl))
2352 : 36 : inform (olddecl_loc, DECL_INITIAL (olddecl)
2353 : : ? G_("previous definition of %qD here")
2354 : : : G_("previous declaration of %qD here"), olddecl);
2355 : 13132154 : }
2356 : :
2357 : : /* [dcl.attr.noreturn]: The first declaration of a function shall
2358 : : specify the noreturn attribute if any declaration of that function
2359 : : specifies the noreturn attribute. */
2360 : 13132154 : tree a;
2361 : 13132154 : if (TREE_THIS_VOLATILE (newdecl)
2362 : 108150 : && !TREE_THIS_VOLATILE (olddecl)
2363 : : /* This applies to [[noreturn]] only, not its GNU variants. */
2364 : 76 : && (a = lookup_attribute ("noreturn", DECL_ATTRIBUTES (newdecl)))
2365 : 54 : && cxx11_attribute_p (a)
2366 : 13132175 : && get_attribute_namespace (a) == NULL_TREE)
2367 : : {
2368 : 9 : auto_diagnostic_group d;
2369 : 9 : error_at (newdecl_loc, "function %qD declared %<[[noreturn]]%> "
2370 : : "but its first declaration was not", newdecl);
2371 : 9 : inform (olddecl_loc, "previous declaration of %qD", olddecl);
2372 : 9 : }
2373 : : }
2374 : :
2375 : : /* Now that functions must hold information normally held
2376 : : by field decls, there is extra work to do so that
2377 : : declaration information does not get destroyed during
2378 : : definition. */
2379 : 13689802 : if (DECL_VINDEX (olddecl))
2380 : 158442 : DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
2381 : 13689802 : if (DECL_CONTEXT (olddecl))
2382 : 13689802 : DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
2383 : 13689802 : DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
2384 : 13689802 : DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
2385 : 13689802 : DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
2386 : 13689802 : DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
2387 : 13689802 : DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
2388 : 13689802 : DECL_FINAL_P (newdecl) |= DECL_FINAL_P (olddecl);
2389 : 13689802 : DECL_OVERRIDE_P (newdecl) |= DECL_OVERRIDE_P (olddecl);
2390 : 13689802 : DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
2391 : 13689802 : DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P (newdecl)
2392 : 13689802 : |= DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P (olddecl);
2393 : 13689802 : if (DECL_OVERLOADED_OPERATOR_P (olddecl))
2394 : 2441269 : DECL_OVERLOADED_OPERATOR_CODE_RAW (newdecl)
2395 : 4882538 : = DECL_OVERLOADED_OPERATOR_CODE_RAW (olddecl);
2396 : 13689802 : new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
2397 : :
2398 : 13689802 : duplicate_contracts (newdecl, olddecl);
2399 : :
2400 : : /* Optionally warn about more than one declaration for the same
2401 : : name, but don't warn about a function declaration followed by a
2402 : : definition. */
2403 : 27 : if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
2404 : 27 : && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
2405 : : /* Don't warn about extern decl followed by definition. */
2406 : 27 : && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
2407 : : /* Don't warn if at least one is/was hidden. */
2408 : 27 : && !(hiding || was_hidden)
2409 : : /* Don't warn about declaration followed by specialization. */
2410 : 13689814 : && (! DECL_TEMPLATE_SPECIALIZATION (newdecl)
2411 : 9 : || DECL_TEMPLATE_SPECIALIZATION (olddecl)))
2412 : : {
2413 : 6 : auto_diagnostic_group d;
2414 : 6 : if (warning_at (newdecl_loc,
2415 : : OPT_Wredundant_decls,
2416 : : "redundant redeclaration of %qD in same scope",
2417 : : newdecl))
2418 : 6 : inform (olddecl_loc,
2419 : : "previous declaration of %qD", olddecl);
2420 : 6 : }
2421 : :
2422 : : /* [dcl.fct.def.delete] A deleted definition of a function shall be the
2423 : : first declaration of the function or, for an explicit specialization
2424 : : of a function template, the first declaration of that
2425 : : specialization. */
2426 : 13689802 : if (!(DECL_TEMPLATE_INSTANTIATION (olddecl)
2427 : 557708 : && DECL_TEMPLATE_SPECIALIZATION (newdecl)))
2428 : : {
2429 : 13132154 : if (DECL_DELETED_FN (newdecl))
2430 : : {
2431 : 21 : auto_diagnostic_group d;
2432 : 21 : if (pedwarn (newdecl_loc, 0, "deleted definition of %qD "
2433 : : "is not first declaration", newdecl))
2434 : 21 : inform (olddecl_loc,
2435 : : "previous declaration of %qD", olddecl);
2436 : 21 : }
2437 : 13132154 : DECL_DELETED_FN (newdecl) |= DECL_DELETED_FN (olddecl);
2438 : 13132154 : if (DECL_DELETED_FN (olddecl)
2439 : 6 : && DECL_INITIAL (olddecl)
2440 : 13132160 : && TREE_CODE (DECL_INITIAL (olddecl)) == STRING_CST)
2441 : 3 : DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2442 : : }
2443 : : }
2444 : :
2445 : : /* Deal with C++: must preserve virtual function table size. */
2446 : 17545619 : if (TREE_CODE (olddecl) == TYPE_DECL)
2447 : : {
2448 : 23743 : tree newtype = TREE_TYPE (newdecl);
2449 : 23743 : tree oldtype = TREE_TYPE (olddecl);
2450 : :
2451 : 23743 : if (newtype != error_mark_node && oldtype != error_mark_node
2452 : 47486 : && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
2453 : 60084 : CLASSTYPE_FRIEND_CLASSES (newtype)
2454 : 20028 : = CLASSTYPE_FRIEND_CLASSES (oldtype);
2455 : :
2456 : 23743 : DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
2457 : : }
2458 : :
2459 : : /* Copy all the DECL_... slots specified in the new decl except for
2460 : : any that we copy here from the old type. */
2461 : 17545619 : if (merge_attr)
2462 : 16987971 : DECL_ATTRIBUTES (newdecl)
2463 : 33975942 : = (*targetm.merge_decl_attributes) (olddecl, newdecl);
2464 : : else
2465 : 557648 : DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2466 : :
2467 : 17545619 : if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2468 : : {
2469 : 3456839 : tree old_result = DECL_TEMPLATE_RESULT (olddecl);
2470 : 3456839 : tree new_result = DECL_TEMPLATE_RESULT (newdecl);
2471 : 3456839 : TREE_TYPE (olddecl) = TREE_TYPE (old_result);
2472 : :
2473 : : /* The new decl should not already have gathered any
2474 : : specializations. */
2475 : 3456839 : gcc_assert (!DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
2476 : :
2477 : : /* Make sure the contracts are equivalent. */
2478 : 3456839 : duplicate_contracts (newdecl, olddecl);
2479 : :
2480 : : /* Remove contracts from old_result so they aren't appended to
2481 : : old_result by the merge function. */
2482 : 3456839 : remove_contract_attributes (old_result);
2483 : :
2484 : 3456839 : DECL_ATTRIBUTES (old_result)
2485 : 3456839 : = (*targetm.merge_decl_attributes) (old_result, new_result);
2486 : :
2487 : 3456839 : if (DECL_FUNCTION_TEMPLATE_P (newdecl))
2488 : : {
2489 : 3456809 : if (DECL_SOURCE_LOCATION (newdecl)
2490 : 3456809 : != DECL_SOURCE_LOCATION (olddecl))
2491 : : {
2492 : : /* Per C++11 8.3.6/4, default arguments cannot be added in
2493 : : later declarations of a function template. */
2494 : 3434694 : check_redeclaration_no_default_args (newdecl);
2495 : : /* C++17 11.3.6/4: "If a friend declaration specifies a default
2496 : : argument expression, that declaration... shall be the only
2497 : : declaration of the function or function template in the
2498 : : translation unit." */
2499 : 3434694 : check_no_redeclaration_friend_default_args
2500 : 3434694 : (old_result, new_result);
2501 : :
2502 : 3434694 : tree new_parms = DECL_INNERMOST_TEMPLATE_PARMS (newdecl);
2503 : 3434694 : tree old_parms = DECL_INNERMOST_TEMPLATE_PARMS (olddecl);
2504 : 3434694 : merge_default_template_args (new_parms, old_parms,
2505 : : /*class_p=*/false);
2506 : : }
2507 : 3456809 : if (!DECL_UNIQUE_FRIEND_P (new_result))
2508 : 2833957 : DECL_UNIQUE_FRIEND_P (old_result) = false;
2509 : :
2510 : 3456809 : check_default_args (newdecl);
2511 : :
2512 : 6913606 : if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
2513 : 3456809 : && DECL_INITIAL (new_result))
2514 : : {
2515 : 24 : if (DECL_INITIAL (old_result))
2516 : 12 : DECL_UNINLINABLE (old_result) = 1;
2517 : : else
2518 : 12 : DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
2519 : 24 : DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
2520 : 72 : DECL_NOT_REALLY_EXTERN (old_result)
2521 : 24 : = DECL_NOT_REALLY_EXTERN (new_result);
2522 : 48 : DECL_INTERFACE_KNOWN (old_result)
2523 : 24 : = DECL_INTERFACE_KNOWN (new_result);
2524 : 24 : DECL_DECLARED_INLINE_P (old_result)
2525 : 24 : = DECL_DECLARED_INLINE_P (new_result);
2526 : 24 : DECL_DISREGARD_INLINE_LIMITS (old_result)
2527 : 24 : |= DECL_DISREGARD_INLINE_LIMITS (new_result);
2528 : : }
2529 : : else
2530 : : {
2531 : 3456785 : DECL_DECLARED_INLINE_P (old_result)
2532 : 3456785 : |= DECL_DECLARED_INLINE_P (new_result);
2533 : 3456785 : DECL_DISREGARD_INLINE_LIMITS (old_result)
2534 : 3456785 : |= DECL_DISREGARD_INLINE_LIMITS (new_result);
2535 : 3456785 : check_redeclaration_exception_specification (newdecl, olddecl);
2536 : :
2537 : 3456785 : merge_attribute_bits (new_result, old_result);
2538 : : }
2539 : : }
2540 : :
2541 : : /* Propagate purviewness and importingness as with
2542 : : set_instantiating_module, unless newdecl is a friend injection. */
2543 : 3456839 : if (modules_p () && DECL_LANG_SPECIFIC (new_result)
2544 : 3468114 : && !(TREE_CODE (new_result) == FUNCTION_DECL
2545 : 11269 : && DECL_UNIQUE_FRIEND_P (new_result)))
2546 : : {
2547 : 9511 : if (DECL_MODULE_PURVIEW_P (new_result))
2548 : 4625 : DECL_MODULE_PURVIEW_P (old_result) = true;
2549 : 9511 : if (!DECL_MODULE_IMPORT_P (new_result))
2550 : 9511 : DECL_MODULE_IMPORT_P (old_result) = false;
2551 : : }
2552 : :
2553 : : /* If the new declaration is a definition, update the file and
2554 : : line information on the declaration, and also make
2555 : : the old declaration the same definition. */
2556 : 3456839 : if (DECL_INITIAL (new_result) != NULL_TREE)
2557 : : {
2558 : 5258750 : DECL_SOURCE_LOCATION (olddecl)
2559 : 5258750 : = DECL_SOURCE_LOCATION (old_result)
2560 : 2629375 : = DECL_SOURCE_LOCATION (newdecl);
2561 : 2629375 : DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
2562 : 2629375 : if (DECL_FUNCTION_TEMPLATE_P (newdecl))
2563 : : {
2564 : 2629375 : DECL_ARGUMENTS (old_result) = DECL_ARGUMENTS (new_result);
2565 : 9348890 : for (tree p = DECL_ARGUMENTS (old_result); p; p = DECL_CHAIN (p))
2566 : 6719515 : DECL_CONTEXT (p) = old_result;
2567 : :
2568 : 5258750 : if (tree fc = DECL_FRIEND_CONTEXT (new_result))
2569 : 14 : SET_DECL_FRIEND_CONTEXT (old_result, fc);
2570 : : }
2571 : : }
2572 : :
2573 : 3456839 : return olddecl;
2574 : : }
2575 : :
2576 : 14088780 : if (types_match)
2577 : : {
2578 : 14088579 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2579 : 13689601 : check_redeclaration_exception_specification (newdecl, olddecl);
2580 : :
2581 : : /* Automatically handles default parameters. */
2582 : 14088579 : tree oldtype = TREE_TYPE (olddecl);
2583 : 14088579 : tree newtype;
2584 : :
2585 : : /* For typedefs use the old type, as the new type's DECL_NAME points
2586 : : at newdecl, which will be ggc_freed. */
2587 : 14088579 : if (TREE_CODE (newdecl) == TYPE_DECL)
2588 : : {
2589 : : /* But NEWTYPE might have an attribute, honor that. */
2590 : 23743 : tree tem = TREE_TYPE (newdecl);
2591 : 23743 : newtype = oldtype;
2592 : :
2593 : 23743 : if (TYPE_USER_ALIGN (tem))
2594 : : {
2595 : 21 : if (TYPE_ALIGN (tem) > TYPE_ALIGN (newtype))
2596 : 6 : SET_TYPE_ALIGN (newtype, TYPE_ALIGN (tem));
2597 : 21 : TYPE_USER_ALIGN (newtype) = true;
2598 : : }
2599 : :
2600 : : /* And remove the new type from the variants list. */
2601 : 23743 : if (TYPE_NAME (TREE_TYPE (newdecl)) == newdecl)
2602 : : {
2603 : 24 : tree remove = TREE_TYPE (newdecl);
2604 : 24 : if (TYPE_MAIN_VARIANT (remove) == remove)
2605 : : {
2606 : 9 : gcc_assert (TYPE_NEXT_VARIANT (remove) == NULL_TREE);
2607 : : /* If remove is the main variant, no need to remove that
2608 : : from the list. One of the DECL_ORIGINAL_TYPE
2609 : : variants, e.g. created for aligned attribute, might still
2610 : : refer to the newdecl TYPE_DECL though, so remove that one
2611 : : in that case. */
2612 : 9 : if (tree orig = DECL_ORIGINAL_TYPE (newdecl))
2613 : 6 : if (orig != remove)
2614 : 6 : for (tree t = TYPE_MAIN_VARIANT (orig); t;
2615 : 0 : t = TYPE_MAIN_VARIANT (t))
2616 : 6 : if (TYPE_NAME (TYPE_NEXT_VARIANT (t)) == newdecl)
2617 : : {
2618 : 12 : TYPE_NEXT_VARIANT (t)
2619 : 6 : = TYPE_NEXT_VARIANT (TYPE_NEXT_VARIANT (t));
2620 : 6 : break;
2621 : : }
2622 : : }
2623 : : else
2624 : 15 : for (tree t = TYPE_MAIN_VARIANT (remove); ;
2625 : 0 : t = TYPE_NEXT_VARIANT (t))
2626 : 15 : if (TYPE_NEXT_VARIANT (t) == remove)
2627 : : {
2628 : 15 : TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (remove);
2629 : 15 : break;
2630 : : }
2631 : : }
2632 : : }
2633 : 14064836 : else if (merge_attr)
2634 : 13507188 : newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
2635 : : else
2636 : 557648 : newtype = TREE_TYPE (newdecl);
2637 : :
2638 : 14088579 : if (VAR_P (newdecl))
2639 : : {
2640 : 375235 : DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
2641 : : /* For already initialized vars, TREE_READONLY could have been
2642 : : cleared in cp_finish_decl, because the var needs runtime
2643 : : initialization or destruction. Make sure not to set
2644 : : TREE_READONLY on it again. */
2645 : 375235 : if (DECL_INITIALIZED_P (olddecl)
2646 : 1213 : && !DECL_EXTERNAL (olddecl)
2647 : 375320 : && !TREE_READONLY (olddecl))
2648 : 30 : TREE_READONLY (newdecl) = 0;
2649 : 375235 : DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
2650 : 750470 : DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
2651 : 375235 : |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
2652 : 375235 : if (DECL_DEPENDENT_INIT_P (olddecl))
2653 : 100599 : SET_DECL_DEPENDENT_INIT_P (newdecl, true);
2654 : 750470 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
2655 : 375235 : |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
2656 : 375235 : DECL_DECLARED_CONSTEXPR_P (newdecl)
2657 : 375235 : |= DECL_DECLARED_CONSTEXPR_P (olddecl);
2658 : 750470 : DECL_DECLARED_CONSTINIT_P (newdecl)
2659 : 375235 : |= DECL_DECLARED_CONSTINIT_P (olddecl);
2660 : :
2661 : : /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2662 : 375235 : if (DECL_LANG_SPECIFIC (olddecl)
2663 : 746869 : && CP_DECL_THREADPRIVATE_P (olddecl))
2664 : : {
2665 : : /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2666 : 41 : retrofit_lang_decl (newdecl);
2667 : 41 : CP_DECL_THREADPRIVATE_P (newdecl) = 1;
2668 : : }
2669 : : }
2670 : :
2671 : : /* An explicit specialization of a function template or of a member
2672 : : function of a class template can be declared transaction_safe
2673 : : independently of whether the corresponding template entity is declared
2674 : : transaction_safe. */
2675 : 1123 : if (flag_tm && TREE_CODE (newdecl) == FUNCTION_DECL
2676 : 1021 : && DECL_TEMPLATE_INSTANTIATION (olddecl)
2677 : 50 : && DECL_TEMPLATE_SPECIALIZATION (newdecl)
2678 : 50 : && tx_safe_fn_type_p (newtype)
2679 : 14088579 : && !tx_safe_fn_type_p (TREE_TYPE (newdecl)))
2680 : 0 : newtype = tx_unsafe_fn_variant (newtype);
2681 : :
2682 : 14088579 : TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
2683 : :
2684 : 14088579 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2685 : 13689601 : check_default_args (newdecl);
2686 : :
2687 : : /* Lay the type out, unless already done. */
2688 : 14088579 : if (! same_type_p (newtype, oldtype)
2689 : 366 : && TREE_TYPE (newdecl) != error_mark_node
2690 : 14088945 : && !(processing_template_decl && uses_template_parms (newdecl)))
2691 : 285 : layout_type (TREE_TYPE (newdecl));
2692 : :
2693 : 14088579 : if ((VAR_P (newdecl)
2694 : 13713344 : || TREE_CODE (newdecl) == PARM_DECL
2695 : 13713344 : || TREE_CODE (newdecl) == RESULT_DECL
2696 : 13713344 : || TREE_CODE (newdecl) == FIELD_DECL
2697 : 13713344 : || TREE_CODE (newdecl) == TYPE_DECL)
2698 : 14112322 : && !(processing_template_decl && uses_template_parms (newdecl)))
2699 : 243948 : layout_decl (newdecl, 0);
2700 : :
2701 : : /* Merge deprecatedness. */
2702 : 14088579 : if (TREE_DEPRECATED (newdecl))
2703 : 11440 : TREE_DEPRECATED (olddecl) = 1;
2704 : :
2705 : : /* Merge unavailability. */
2706 : 14088579 : if (TREE_UNAVAILABLE (newdecl))
2707 : 3 : TREE_UNAVAILABLE (olddecl) = 1;
2708 : :
2709 : : /* Preserve function specific target and optimization options */
2710 : 14088579 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2711 : : {
2712 : 13689601 : if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
2713 : 13689601 : && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
2714 : 0 : DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
2715 : 0 : = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
2716 : :
2717 : 13689601 : if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
2718 : 13689601 : && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
2719 : 31 : DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
2720 : 31 : = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
2721 : :
2722 : 13689601 : if (!DECL_UNIQUE_FRIEND_P (olddecl))
2723 : 13527634 : DECL_UNIQUE_FRIEND_P (newdecl) = false;
2724 : : }
2725 : : else
2726 : : {
2727 : : /* Merge the const type qualifier. */
2728 : 398978 : if (TREE_READONLY (newdecl))
2729 : 38270 : TREE_READONLY (olddecl) = 1;
2730 : : /* Merge the volatile type qualifier. */
2731 : 398978 : if (TREE_THIS_VOLATILE (newdecl))
2732 : 5 : TREE_THIS_VOLATILE (olddecl) = 1;
2733 : : }
2734 : :
2735 : : /* Merge the initialization information. */
2736 : 14088579 : if (DECL_INITIAL (newdecl) == NULL_TREE
2737 : 14088579 : && DECL_INITIAL (olddecl) != NULL_TREE)
2738 : : {
2739 : 168515 : DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2740 : 168515 : DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
2741 : 168515 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2742 : : {
2743 : 11430 : DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
2744 : 11430 : DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
2745 : : }
2746 : : }
2747 : :
2748 : 14088579 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2749 : : {
2750 : 13689601 : DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
2751 : 13689601 : |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
2752 : 13689601 : DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
2753 : 13689601 : if (DECL_IS_OPERATOR_NEW_P (olddecl))
2754 : 50786 : DECL_SET_IS_OPERATOR_NEW (newdecl, true);
2755 : 13689601 : DECL_LOOPING_CONST_OR_PURE_P (newdecl)
2756 : 13689601 : |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
2757 : 13689601 : DECL_IS_REPLACEABLE_OPERATOR (newdecl)
2758 : 13689601 : |= DECL_IS_REPLACEABLE_OPERATOR (olddecl);
2759 : :
2760 : 13689601 : if (merge_attr)
2761 : 13131953 : merge_attribute_bits (newdecl, olddecl);
2762 : : else
2763 : : {
2764 : : /* Merge the noreturn bit. */
2765 : 557648 : TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
2766 : 557648 : TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
2767 : 557648 : TREE_NOTHROW (olddecl) = TREE_NOTHROW (newdecl);
2768 : 557648 : DECL_IS_MALLOC (olddecl) = DECL_IS_MALLOC (newdecl);
2769 : 557648 : DECL_PURE_P (olddecl) = DECL_PURE_P (newdecl);
2770 : : }
2771 : : /* Keep the old RTL. */
2772 : 13689601 : COPY_DECL_RTL (olddecl, newdecl);
2773 : : }
2774 : 398978 : else if (VAR_P (newdecl)
2775 : 398978 : && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
2776 : : {
2777 : : /* Keep the old RTL. We cannot keep the old RTL if the old
2778 : : declaration was for an incomplete object and the new
2779 : : declaration is not since many attributes of the RTL will
2780 : : change. */
2781 : 375161 : COPY_DECL_RTL (olddecl, newdecl);
2782 : : }
2783 : : }
2784 : : /* If cannot merge, then use the new type and qualifiers,
2785 : : and don't preserve the old rtl. */
2786 : : else
2787 : : {
2788 : : /* Clean out any memory we had of the old declaration. */
2789 : 201 : tree oldstatic = value_member (olddecl, static_aggregates);
2790 : 201 : if (oldstatic)
2791 : 0 : TREE_VALUE (oldstatic) = error_mark_node;
2792 : :
2793 : 201 : TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
2794 : 201 : TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
2795 : 201 : TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
2796 : 201 : TREE_NOTHROW (olddecl) = TREE_NOTHROW (newdecl);
2797 : 201 : TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
2798 : : }
2799 : :
2800 : : /* Merge the storage class information. */
2801 : 14088780 : merge_weak (newdecl, olddecl);
2802 : :
2803 : 14088780 : DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
2804 : 14088780 : TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
2805 : 14088780 : TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
2806 : 14088780 : if (! DECL_EXTERNAL (olddecl))
2807 : 28360 : DECL_EXTERNAL (newdecl) = 0;
2808 : 14088780 : if (! DECL_COMDAT (olddecl))
2809 : 5651405 : DECL_COMDAT (newdecl) = 0;
2810 : :
2811 : 14088780 : if (VAR_OR_FUNCTION_DECL_P (newdecl) && DECL_LOCAL_DECL_P (newdecl))
2812 : : {
2813 : 75 : if (!DECL_LOCAL_DECL_P (olddecl))
2814 : : /* This can happen if olddecl was brought in from the
2815 : : enclosing namespace via a using-decl. The new decl is
2816 : : then not a block-scope extern at all. */
2817 : 3 : DECL_LOCAL_DECL_P (newdecl) = false;
2818 : : else
2819 : : {
2820 : 72 : retrofit_lang_decl (newdecl);
2821 : 72 : tree alias = DECL_LOCAL_DECL_ALIAS (newdecl)
2822 : 72 : = DECL_LOCAL_DECL_ALIAS (olddecl);
2823 : 72 : if (alias != error_mark_node)
2824 : : {
2825 : 69 : DECL_ATTRIBUTES (alias)
2826 : 69 : = (*targetm.merge_decl_attributes) (alias, newdecl);
2827 : 69 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2828 : 39 : merge_attribute_bits (newdecl, alias);
2829 : : }
2830 : : }
2831 : : }
2832 : :
2833 : 14088780 : new_template_info = NULL_TREE;
2834 : 14088780 : if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
2835 : : {
2836 : 14061451 : bool new_redefines_gnu_inline = false;
2837 : :
2838 : 14061451 : if (new_defines_function
2839 : 14061451 : && ((DECL_INTERFACE_KNOWN (olddecl)
2840 : 1238 : && TREE_CODE (olddecl) == FUNCTION_DECL)
2841 : 8753347 : || (TREE_CODE (olddecl) == TEMPLATE_DECL
2842 : 0 : && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
2843 : : == FUNCTION_DECL))))
2844 : 2476 : new_redefines_gnu_inline = GNU_INLINE_P (STRIP_TEMPLATE (olddecl));
2845 : :
2846 : : if (!new_redefines_gnu_inline)
2847 : : {
2848 : 14061373 : DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
2849 : 14061373 : DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
2850 : 14061373 : DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
2851 : : }
2852 : :
2853 : 14061451 : if (TREE_CODE (newdecl) != TYPE_DECL)
2854 : : {
2855 : 14061399 : DECL_TEMPLATE_INSTANTIATED (newdecl)
2856 : 14061399 : |= DECL_TEMPLATE_INSTANTIATED (olddecl);
2857 : 14061399 : DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
2858 : :
2859 : : /* If the OLDDECL is an instantiation and/or specialization,
2860 : : then the NEWDECL must be too. But, it may not yet be marked
2861 : : as such if the caller has created NEWDECL, but has not yet
2862 : : figured out that it is a redeclaration. */
2863 : 14061399 : if (!DECL_USE_TEMPLATE (newdecl))
2864 : 13503477 : DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
2865 : :
2866 : 14061399 : if (!DECL_TEMPLATE_SPECIALIZATION (newdecl))
2867 : 13503527 : DECL_INITIALIZED_IN_CLASS_P (newdecl)
2868 : 27007054 : |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
2869 : : }
2870 : :
2871 : : /* Don't really know how much of the language-specific
2872 : : values we should copy from old to new. */
2873 : 14061451 : DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
2874 : :
2875 : 14061451 : if (LANG_DECL_HAS_MIN (newdecl))
2876 : : {
2877 : 14061451 : DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
2878 : 14061451 : if (DECL_TEMPLATE_INFO (newdecl))
2879 : : {
2880 : 569046 : new_template_info = DECL_TEMPLATE_INFO (newdecl);
2881 : 569046 : if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2882 : 569046 : && DECL_TEMPLATE_SPECIALIZATION (newdecl))
2883 : : /* Remember the presence of explicit specialization args. */
2884 : 1115302 : TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl))
2885 : 1115302 : = TINFO_USED_TEMPLATE_ID (new_template_info);
2886 : : }
2887 : :
2888 : : /* We don't want to copy template info from a non-templated friend
2889 : : (PR105761), but these shouldn't have DECL_TEMPLATE_INFO now. */
2890 : 14061451 : gcc_checking_assert (!DECL_TEMPLATE_INFO (olddecl)
2891 : : || !non_templated_friend_p (olddecl));
2892 : 14061451 : DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
2893 : : }
2894 : :
2895 : 14061451 : if (DECL_DECLARES_FUNCTION_P (newdecl))
2896 : : {
2897 : : /* Only functions have these fields. */
2898 : 13689802 : DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
2899 : 13689802 : DECL_BEFRIENDING_CLASSES (newdecl)
2900 : 13689802 : = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2901 : 13689802 : DECL_BEFRIENDING_CLASSES (olddecl));
2902 : : /* DECL_THUNKS is only valid for virtual functions,
2903 : : otherwise it is a DECL_FRIEND_CONTEXT. */
2904 : 13689802 : if (DECL_VIRTUAL_P (newdecl))
2905 : 631108 : SET_DECL_THUNKS (newdecl, DECL_THUNKS (olddecl));
2906 : 26117388 : else if (tree fc = DECL_FRIEND_CONTEXT (newdecl))
2907 : 96803 : SET_DECL_FRIEND_CONTEXT (olddecl, fc);
2908 : : }
2909 : 371649 : else if (VAR_P (newdecl))
2910 : : {
2911 : : /* Only variables have this field. */
2912 : 371597 : if (VAR_HAD_UNKNOWN_BOUND (olddecl))
2913 : 194 : SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2914 : : }
2915 : : }
2916 : :
2917 : 14088780 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2918 : : {
2919 : 13689802 : tree parm;
2920 : :
2921 : : /* Merge parameter attributes. */
2922 : 13689802 : tree oldarg, newarg;
2923 : 13689802 : for (oldarg = DECL_ARGUMENTS(olddecl), newarg = DECL_ARGUMENTS(newdecl);
2924 : 39086384 : oldarg && newarg;
2925 : 25396582 : oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg))
2926 : : {
2927 : 25396582 : DECL_ATTRIBUTES (newarg)
2928 : 25396582 : = (*targetm.merge_decl_attributes) (oldarg, newarg);
2929 : 25396582 : DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2930 : : }
2931 : :
2932 : 13689802 : if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2933 : 13689802 : && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2934 : : {
2935 : : /* If newdecl is not a specialization, then it is not a
2936 : : template-related function at all. And that means that we
2937 : : should have exited above, returning 0. */
2938 : 557648 : gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2939 : :
2940 : 557648 : if (DECL_ODR_USED (olddecl))
2941 : : /* From [temp.expl.spec]:
2942 : :
2943 : : If a template, a member template or the member of a class
2944 : : template is explicitly specialized then that
2945 : : specialization shall be declared before the first use of
2946 : : that specialization that would cause an implicit
2947 : : instantiation to take place, in every translation unit in
2948 : : which such a use occurs. */
2949 : 0 : error ("explicit specialization of %qD after first use",
2950 : : olddecl);
2951 : :
2952 : 557648 : SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2953 : 557648 : DECL_COMDAT (newdecl) = (TREE_PUBLIC (newdecl)
2954 : 1115143 : && DECL_DECLARED_INLINE_P (newdecl));
2955 : :
2956 : : /* Don't propagate visibility from the template to the
2957 : : specialization here. We'll do that in determine_visibility if
2958 : : appropriate. */
2959 : 557648 : DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2960 : :
2961 : : /* [temp.expl.spec/14] We don't inline explicit specialization
2962 : : just because the primary template says so. */
2963 : 557648 : gcc_assert (!merge_attr);
2964 : :
2965 : 557648 : DECL_DECLARED_INLINE_P (olddecl)
2966 : 557648 : = DECL_DECLARED_INLINE_P (newdecl);
2967 : :
2968 : 557648 : DECL_DISREGARD_INLINE_LIMITS (olddecl)
2969 : 557648 : = DECL_DISREGARD_INLINE_LIMITS (newdecl);
2970 : :
2971 : 557648 : DECL_UNINLINABLE (olddecl) = DECL_UNINLINABLE (newdecl);
2972 : : }
2973 : 13132154 : else if (new_defines_function && DECL_INITIAL (olddecl))
2974 : : {
2975 : : /* Never inline re-defined extern inline functions.
2976 : : FIXME: this could be better handled by keeping both
2977 : : function as separate declarations. */
2978 : 78 : DECL_UNINLINABLE (newdecl) = 1;
2979 : : }
2980 : : else
2981 : : {
2982 : 13132076 : if (DECL_PENDING_INLINE_P (olddecl))
2983 : : {
2984 : 6 : DECL_PENDING_INLINE_P (newdecl) = 1;
2985 : 6 : DECL_PENDING_INLINE_INFO (newdecl)
2986 : 12 : = DECL_PENDING_INLINE_INFO (olddecl);
2987 : : }
2988 : 13132070 : else if (DECL_PENDING_INLINE_P (newdecl))
2989 : : ;
2990 : 13132070 : else if (DECL_SAVED_AUTO_RETURN_TYPE (newdecl) == NULL)
2991 : 13132070 : DECL_SAVED_AUTO_RETURN_TYPE (newdecl)
2992 : 26264140 : = DECL_SAVED_AUTO_RETURN_TYPE (olddecl);
2993 : :
2994 : 13132076 : DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2995 : :
2996 : 39396228 : DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2997 : 26264152 : = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2998 : :
2999 : 26264152 : DECL_DISREGARD_INLINE_LIMITS (newdecl)
3000 : 13132076 : = DECL_DISREGARD_INLINE_LIMITS (olddecl)
3001 : 13132076 : = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
3002 : 25879975 : || DECL_DISREGARD_INLINE_LIMITS (olddecl));
3003 : : }
3004 : :
3005 : : /* Preserve abstractness on cloned [cd]tors. */
3006 : 13689802 : DECL_ABSTRACT_P (newdecl) = DECL_ABSTRACT_P (olddecl);
3007 : :
3008 : : /* Update newdecl's parms to point at olddecl. */
3009 : 44591549 : for (parm = DECL_ARGUMENTS (newdecl); parm;
3010 : 30901747 : parm = DECL_CHAIN (parm))
3011 : 30901747 : DECL_CONTEXT (parm) = olddecl;
3012 : :
3013 : 13689802 : if (! types_match)
3014 : : {
3015 : 201 : SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
3016 : 201 : COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
3017 : 201 : COPY_DECL_RTL (newdecl, olddecl);
3018 : : }
3019 : 13689802 : if (! types_match || new_defines_function)
3020 : : {
3021 : : /* These are the final DECL_ARGUMENTS that will be used within the
3022 : : body; update any references to old DECL_ARGUMENTS in the
3023 : : contracts, if present. */
3024 : 8754786 : if (tree contracts = DECL_CONTRACTS (newdecl))
3025 : 132 : remap_contracts (olddecl, newdecl, contracts, true);
3026 : :
3027 : : /* These need to be copied so that the names are available.
3028 : : Note that if the types do match, we'll preserve inline
3029 : : info and other bits, but if not, we won't. */
3030 : 8754786 : DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
3031 : 8754786 : DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
3032 : :
3033 : : /* In some cases, duplicate_contracts will remove contracts from
3034 : : OLDDECL, to avoid duplications. Sometimes, the contracts end up
3035 : : shared. If we removed them, re-add them. */
3036 : 8754786 : if (!DECL_CONTRACTS (olddecl))
3037 : 8754739 : copy_contract_attributes (olddecl, newdecl);
3038 : : }
3039 : : /* If redeclaring a builtin function, it stays built in
3040 : : if newdecl is a gnu_inline definition, or if newdecl is just
3041 : : a declaration. */
3042 : 13689802 : if (fndecl_built_in_p (olddecl)
3043 : 13745921 : && (new_defines_function ? GNU_INLINE_P (newdecl) : types_match))
3044 : : {
3045 : 3642512 : copy_decl_built_in_function (newdecl, olddecl);
3046 : : /* If we're keeping the built-in definition, keep the rtl,
3047 : : regardless of declaration matches. */
3048 : 3642512 : COPY_DECL_RTL (olddecl, newdecl);
3049 : 3642512 : if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL)
3050 : : {
3051 : 3642506 : enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl);
3052 : 3642506 : if (builtin_decl_explicit_p (fncode))
3053 : : {
3054 : : /* A compatible prototype of these builtin functions
3055 : : is seen, assume the runtime implements it with
3056 : : the expected semantics. */
3057 : 3642506 : switch (fncode)
3058 : : {
3059 : 10186 : case BUILT_IN_STPCPY:
3060 : 10186 : set_builtin_decl_implicit_p (fncode, true);
3061 : 10186 : break;
3062 : 3632320 : default:
3063 : 3632320 : set_builtin_decl_declared_p (fncode, true);
3064 : 3632320 : break;
3065 : : }
3066 : : }
3067 : :
3068 : 3642506 : copy_attributes_to_builtin (newdecl);
3069 : : }
3070 : : }
3071 : 13689802 : if (new_defines_function)
3072 : : /* If defining a function declared with other language
3073 : : linkage, use the previously declared language linkage. */
3074 : 8754585 : SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
3075 : 4935217 : else if (types_match)
3076 : : {
3077 : 4935016 : DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3078 : : /* Don't clear out the arguments if we're just redeclaring a
3079 : : function. */
3080 : 4935016 : if (DECL_ARGUMENTS (olddecl))
3081 : : {
3082 : : /* If we removed contracts from previous definition, re-attach
3083 : : them. Otherwise, rewrite the contracts so they match the
3084 : : parameters of the new declaration. */
3085 : 1203657 : if (DECL_INITIAL (olddecl)
3086 : 11323 : && DECL_CONTRACTS (newdecl)
3087 : 1203668 : && !DECL_CONTRACTS (olddecl))
3088 : 10 : copy_contract_attributes (olddecl, newdecl);
3089 : : else
3090 : : {
3091 : : /* Temporarily undo the re-contexting of parameters so we can
3092 : : actually remap parameters. The inliner won't replace
3093 : : parameters if we don't do this. */
3094 : 1203647 : tree args = DECL_ARGUMENTS (newdecl);
3095 : 4505136 : for (tree p = args; p; p = DECL_CHAIN (p))
3096 : 3301489 : DECL_CONTEXT (p) = newdecl;
3097 : :
3098 : : /* Save new argument names for use in contracts parsing,
3099 : : unless we've already started parsing the body of olddecl
3100 : : (particular issues arise when newdecl is from a prior
3101 : : friend decl with no argument names, see
3102 : : modules/contracts-tpl-friend-1). */
3103 : 1203647 : if (tree contracts = DECL_CONTRACTS (olddecl))
3104 : 29 : remap_contracts (newdecl, olddecl, contracts, true);
3105 : :
3106 : : /* And reverse this operation again. */
3107 : 4505136 : for (tree p = args; p; p = DECL_CHAIN (p))
3108 : 3301489 : DECL_CONTEXT (p) = olddecl;
3109 : : }
3110 : :
3111 : 1203657 : DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
3112 : : }
3113 : : }
3114 : : }
3115 : 398978 : else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
3116 : 0 : NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
3117 : :
3118 : : /* Now preserve various other info from the definition. */
3119 : 14088780 : TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
3120 : 14088780 : TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
3121 : 14088780 : DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
3122 : 14088780 : COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
3123 : :
3124 : : /* Warn about conflicting visibility specifications. */
3125 : 14088780 : if (DECL_VISIBILITY_SPECIFIED (olddecl)
3126 : 4890600 : && DECL_VISIBILITY_SPECIFIED (newdecl)
3127 : 14089292 : && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
3128 : : {
3129 : 12 : auto_diagnostic_group d;
3130 : 12 : if (warning_at (newdecl_loc, OPT_Wattributes,
3131 : : "%qD: visibility attribute ignored because it "
3132 : : "conflicts with previous declaration", newdecl))
3133 : 12 : inform (olddecl_loc,
3134 : : "previous declaration of %qD", olddecl);
3135 : 12 : }
3136 : : /* Choose the declaration which specified visibility. */
3137 : 14088780 : if (DECL_VISIBILITY_SPECIFIED (olddecl))
3138 : : {
3139 : 4890600 : DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
3140 : 4890600 : DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
3141 : : }
3142 : : /* Init priority used to be merged from newdecl to olddecl by the memcpy,
3143 : : so keep this behavior. */
3144 : 14088780 : if (VAR_P (newdecl) && DECL_HAS_INIT_PRIORITY_P (newdecl))
3145 : : {
3146 : 10 : SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
3147 : 10 : DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
3148 : : }
3149 : : /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
3150 : 14088780 : if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl))
3151 : : {
3152 : 54 : SET_DECL_ALIGN (newdecl, DECL_ALIGN (olddecl));
3153 : 54 : DECL_USER_ALIGN (newdecl) |= DECL_USER_ALIGN (olddecl);
3154 : : }
3155 : 14088726 : else if (DECL_ALIGN (olddecl) == DECL_ALIGN (newdecl)
3156 : 14088726 : && DECL_USER_ALIGN (olddecl) != DECL_USER_ALIGN (newdecl))
3157 : 3 : DECL_USER_ALIGN (newdecl) = 1;
3158 : :
3159 : 14088780 : DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
3160 : 28177560 : if (DECL_WARN_IF_NOT_ALIGN (olddecl)
3161 : 14088780 : > DECL_WARN_IF_NOT_ALIGN (newdecl))
3162 : 0 : SET_DECL_WARN_IF_NOT_ALIGN (newdecl,
3163 : : DECL_WARN_IF_NOT_ALIGN (olddecl));
3164 : 14088780 : if (TREE_CODE (newdecl) == FIELD_DECL)
3165 : 0 : DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
3166 : :
3167 : : /* Merge module entity mapping information. */
3168 : 14088780 : if (DECL_LANG_SPECIFIC (olddecl)
3169 : 28150268 : && (DECL_MODULE_ENTITY_P (olddecl)
3170 : 14061224 : || DECL_MODULE_KEYED_DECLS_P (olddecl)))
3171 : : {
3172 : 264 : retrofit_lang_decl (newdecl);
3173 : 264 : DECL_MODULE_ENTITY_P (newdecl) = DECL_MODULE_ENTITY_P (olddecl);
3174 : 264 : DECL_MODULE_KEYED_DECLS_P (newdecl) = DECL_MODULE_KEYED_DECLS_P (olddecl);
3175 : : }
3176 : :
3177 : : /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
3178 : : with that from NEWDECL below. */
3179 : 14088780 : if (DECL_LANG_SPECIFIC (olddecl))
3180 : : {
3181 : 14061488 : gcc_checking_assert (DECL_LANG_SPECIFIC (olddecl)
3182 : : != DECL_LANG_SPECIFIC (newdecl));
3183 : 14061488 : ggc_free (DECL_LANG_SPECIFIC (olddecl));
3184 : : }
3185 : :
3186 : : /* Merge the USED information. */
3187 : 14088780 : if (TREE_USED (olddecl))
3188 : 471526 : TREE_USED (newdecl) = 1;
3189 : 13617254 : else if (TREE_USED (newdecl))
3190 : 54 : TREE_USED (olddecl) = 1;
3191 : :
3192 : 14088780 : if (VAR_P (newdecl))
3193 : : {
3194 : 375235 : if (DECL_READ_P (olddecl))
3195 : 33344 : DECL_READ_P (newdecl) = 1;
3196 : 341891 : else if (DECL_READ_P (newdecl))
3197 : 3 : DECL_READ_P (olddecl) = 1;
3198 : : }
3199 : :
3200 : 14088780 : if (DECL_PRESERVE_P (olddecl))
3201 : 48 : DECL_PRESERVE_P (newdecl) = 1;
3202 : 14088732 : else if (DECL_PRESERVE_P (newdecl))
3203 : 63 : DECL_PRESERVE_P (olddecl) = 1;
3204 : :
3205 : : /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
3206 : : to olddecl and deleted. */
3207 : 14088780 : if (TREE_CODE (newdecl) == FUNCTION_DECL
3208 : 27778582 : && DECL_FUNCTION_VERSIONED (olddecl))
3209 : : {
3210 : : /* Set the flag for newdecl so that it gets copied to olddecl. */
3211 : 258 : DECL_FUNCTION_VERSIONED (newdecl) = 1;
3212 : : /* newdecl will be purged after copying to olddecl and is no longer
3213 : : a version. */
3214 : 258 : cgraph_node::delete_function_version_by_decl (newdecl);
3215 : : }
3216 : :
3217 : 14088780 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
3218 : : {
3219 : 13689802 : int function_size;
3220 : 13689802 : struct symtab_node *snode = symtab_node::get (olddecl);
3221 : :
3222 : 13689802 : function_size = sizeof (struct tree_decl_common);
3223 : :
3224 : 13689802 : memcpy ((char *) olddecl + sizeof (struct tree_common),
3225 : : (char *) newdecl + sizeof (struct tree_common),
3226 : : function_size - sizeof (struct tree_common));
3227 : :
3228 : 13689802 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3229 : : (char *) newdecl + sizeof (struct tree_decl_common),
3230 : : sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
3231 : :
3232 : : /* Preserve symtab node mapping. */
3233 : 13689802 : olddecl->decl_with_vis.symtab_node = snode;
3234 : :
3235 : 13689802 : if (new_template_info)
3236 : : /* If newdecl is a template instantiation, it is possible that
3237 : : the following sequence of events has occurred:
3238 : :
3239 : : o A friend function was declared in a class template. The
3240 : : class template was instantiated.
3241 : :
3242 : : o The instantiation of the friend declaration was
3243 : : recorded on the instantiation list, and is newdecl.
3244 : :
3245 : : o Later, however, instantiate_class_template called pushdecl
3246 : : on the newdecl to perform name injection. But, pushdecl in
3247 : : turn called duplicate_decls when it discovered that another
3248 : : declaration of a global function with the same name already
3249 : : existed.
3250 : :
3251 : : o Here, in duplicate_decls, we decided to clobber newdecl.
3252 : :
3253 : : If we're going to do that, we'd better make sure that
3254 : : olddecl, and not newdecl, is on the list of
3255 : : instantiations so that if we try to do the instantiation
3256 : : again we won't get the clobbered declaration. */
3257 : 569037 : reregister_specialization (newdecl,
3258 : : new_template_info,
3259 : : olddecl);
3260 : : }
3261 : : else
3262 : : {
3263 : 398978 : size_t size = tree_code_size (TREE_CODE (newdecl));
3264 : :
3265 : 398978 : memcpy ((char *) olddecl + sizeof (struct tree_common),
3266 : : (char *) newdecl + sizeof (struct tree_common),
3267 : : sizeof (struct tree_decl_common) - sizeof (struct tree_common));
3268 : :
3269 : 398978 : switch (TREE_CODE (newdecl))
3270 : : {
3271 : 398978 : case LABEL_DECL:
3272 : 398978 : case VAR_DECL:
3273 : 398978 : case RESULT_DECL:
3274 : 398978 : case PARM_DECL:
3275 : 398978 : case FIELD_DECL:
3276 : 398978 : case TYPE_DECL:
3277 : 398978 : case CONST_DECL:
3278 : 398978 : {
3279 : 398978 : struct symtab_node *snode = NULL;
3280 : :
3281 : 398978 : if (VAR_P (newdecl)
3282 : 398978 : && (TREE_STATIC (olddecl) || TREE_PUBLIC (olddecl)
3283 : 3 : || DECL_EXTERNAL (olddecl)))
3284 : 375235 : snode = symtab_node::get (olddecl);
3285 : 398978 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3286 : : (char *) newdecl + sizeof (struct tree_decl_common),
3287 : : size - sizeof (struct tree_decl_common)
3288 : 398978 : + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
3289 : 398978 : if (VAR_P (newdecl))
3290 : 375235 : olddecl->decl_with_vis.symtab_node = snode;
3291 : : }
3292 : : break;
3293 : 0 : default:
3294 : 0 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3295 : : (char *) newdecl + sizeof (struct tree_decl_common),
3296 : : sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
3297 : 0 : + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
3298 : 0 : break;
3299 : : }
3300 : : }
3301 : :
3302 : 14088780 : if (VAR_OR_FUNCTION_DECL_P (newdecl))
3303 : : {
3304 : 14065037 : if (DECL_EXTERNAL (olddecl)
3305 : : || TREE_PUBLIC (olddecl)
3306 : 14065037 : || TREE_STATIC (olddecl))
3307 : : {
3308 : : /* Merge the section attribute.
3309 : : We want to issue an error if the sections conflict but that must be
3310 : : done later in decl_attributes since we are called before attributes
3311 : : are assigned. */
3312 : 14065037 : if (DECL_SECTION_NAME (newdecl) != NULL)
3313 : 7 : set_decl_section_name (olddecl, newdecl);
3314 : :
3315 : 14065037 : if (DECL_ONE_ONLY (newdecl))
3316 : : {
3317 : 0 : struct symtab_node *oldsym, *newsym;
3318 : 0 : if (TREE_CODE (olddecl) == FUNCTION_DECL)
3319 : 0 : oldsym = cgraph_node::get_create (olddecl);
3320 : : else
3321 : 0 : oldsym = varpool_node::get_create (olddecl);
3322 : 0 : newsym = symtab_node::get (newdecl);
3323 : 0 : oldsym->set_comdat_group (newsym->get_comdat_group ());
3324 : : }
3325 : : }
3326 : :
3327 : 14065037 : if (VAR_P (newdecl)
3328 : 14065037 : && CP_DECL_THREAD_LOCAL_P (newdecl))
3329 : : {
3330 : 383 : CP_DECL_THREAD_LOCAL_P (olddecl) = true;
3331 : 383 : if (!processing_template_decl)
3332 : 368 : set_decl_tls_model (olddecl, DECL_TLS_MODEL (newdecl));
3333 : : }
3334 : : }
3335 : :
3336 : 14088780 : DECL_UID (olddecl) = olddecl_uid;
3337 : :
3338 : : /* NEWDECL contains the merged attribute lists.
3339 : : Update OLDDECL to be the same. */
3340 : 14088780 : DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
3341 : :
3342 : : /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
3343 : : so that encode_section_info has a chance to look at the new decl
3344 : : flags and attributes. */
3345 : 14088780 : if (DECL_RTL_SET_P (olddecl)
3346 : 14088780 : && (TREE_CODE (olddecl) == FUNCTION_DECL
3347 : 0 : || (VAR_P (olddecl)
3348 : 0 : && TREE_STATIC (olddecl))))
3349 : 0 : make_decl_rtl (olddecl);
3350 : :
3351 : : /* The NEWDECL will no longer be needed. Because every out-of-class
3352 : : declaration of a member results in a call to duplicate_decls,
3353 : : freeing these nodes represents in a significant savings.
3354 : :
3355 : : Before releasing the node, be sore to remove function from symbol
3356 : : table that might have been inserted there to record comdat group.
3357 : : Be sure to however do not free DECL_STRUCT_FUNCTION because this
3358 : : structure is shared in between newdecl and oldecl. */
3359 : 14088780 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
3360 : 13689802 : DECL_STRUCT_FUNCTION (newdecl) = NULL;
3361 : 14088780 : if (VAR_OR_FUNCTION_DECL_P (newdecl))
3362 : : {
3363 : 14065037 : struct symtab_node *snode = symtab_node::get (newdecl);
3364 : 14065037 : if (snode)
3365 : 396 : snode->remove ();
3366 : : }
3367 : :
3368 : 14088780 : if (TREE_CODE (olddecl) == FUNCTION_DECL)
3369 : : {
3370 : 13689802 : tree clone;
3371 : 14188749 : FOR_EACH_CLONE (clone, olddecl)
3372 : : {
3373 : 498947 : DECL_ATTRIBUTES (clone) = DECL_ATTRIBUTES (olddecl);
3374 : 498947 : DECL_PRESERVE_P (clone) |= DECL_PRESERVE_P (olddecl);
3375 : : }
3376 : : }
3377 : :
3378 : : /* Remove the associated constraints for newdecl, if any, before
3379 : : reclaiming memory. */
3380 : 14088780 : if (flag_concepts)
3381 : 3339916 : remove_constraints (newdecl);
3382 : :
3383 : : /* And similarly for any module tracking data. */
3384 : 14088780 : if (modules_p ())
3385 : 28342 : remove_defining_module (newdecl);
3386 : :
3387 : 14088780 : ggc_free (newdecl);
3388 : :
3389 : 14088780 : return olddecl;
3390 : : }
3391 : :
3392 : : /* Return zero if the declaration NEWDECL is valid
3393 : : when the declaration OLDDECL (assumed to be for the same name)
3394 : : has already been seen.
3395 : : Otherwise return an error message format string with a %s
3396 : : where the identifier should go. */
3397 : :
3398 : : static const char *
3399 : 13914612 : redeclaration_error_message (tree newdecl, tree olddecl)
3400 : : {
3401 : 13914648 : if (TREE_CODE (newdecl) == TYPE_DECL)
3402 : : {
3403 : : /* Because C++ can put things into name space for free,
3404 : : constructs like "typedef struct foo { ... } foo"
3405 : : would look like an erroneous redeclaration. */
3406 : 53965 : if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
3407 : : return NULL;
3408 : : else
3409 : : return G_("redefinition of %q#D");
3410 : : }
3411 : 13860683 : else if (TREE_CODE (newdecl) == FUNCTION_DECL)
3412 : : {
3413 : : /* If this is a pure function, its olddecl will actually be
3414 : : the original initialization to `0' (which we force to call
3415 : : abort()). Don't complain about redefinition in this case. */
3416 : 20056604 : if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
3417 : 10028320 : && DECL_INITIAL (olddecl) == NULL_TREE)
3418 : : return NULL;
3419 : :
3420 : : /* If both functions come from different namespaces, this is not
3421 : : a redeclaration - this is a conflict with a used function. */
3422 : 20056574 : if (DECL_NAMESPACE_SCOPE_P (olddecl)
3423 : 1541358 : && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
3424 : 10028290 : && ! decls_match (olddecl, newdecl))
3425 : : return G_("%qD conflicts with used function");
3426 : :
3427 : : /* We'll complain about linkage mismatches in
3428 : : warn_extern_redeclared_static. */
3429 : :
3430 : : /* Defining the same name twice is no good. */
3431 : 10028287 : if (decl_defined_p (olddecl)
3432 : 10028287 : && decl_defined_p (newdecl))
3433 : : {
3434 : 306 : if (DECL_NAME (olddecl) == NULL_TREE)
3435 : : return G_("%q#D not declared in class");
3436 : 447 : else if (!GNU_INLINE_P (olddecl)
3437 : 393 : || GNU_INLINE_P (newdecl))
3438 : 222 : return G_("redefinition of %q#D");
3439 : : }
3440 : :
3441 : 10693111 : if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
3442 : : {
3443 : 620468 : bool olda = GNU_INLINE_P (olddecl);
3444 : 620468 : bool newa = GNU_INLINE_P (newdecl);
3445 : :
3446 : 620468 : if (olda != newa)
3447 : : {
3448 : 15 : if (newa)
3449 : : return G_("%q+D redeclared inline with "
3450 : : "%<gnu_inline%> attribute");
3451 : : else
3452 : : return G_("%q+D redeclared inline without "
3453 : : "%<gnu_inline%> attribute");
3454 : : }
3455 : : }
3456 : :
3457 : : /* [class.compare.default]: A definition of a comparison operator as
3458 : : defaulted that appears in a class shall be the first declaration of
3459 : : that function. */
3460 : 10028050 : special_function_kind sfk = special_function_p (olddecl);
3461 : 10028050 : if (sfk == sfk_comparison && DECL_DEFAULTED_FN (newdecl))
3462 : : return G_("comparison operator %q+D defaulted after "
3463 : : "its first declaration");
3464 : :
3465 : 10028047 : check_abi_tag_redeclaration
3466 : 10028047 : (olddecl, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl)),
3467 : 10028047 : lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl)));
3468 : :
3469 : 10028047 : return NULL;
3470 : : }
3471 : 3832381 : else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3472 : : {
3473 : 3456878 : tree nt, ot;
3474 : :
3475 : 3456878 : if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == CONCEPT_DECL)
3476 : : return G_("redefinition of %q#D");
3477 : :
3478 : 3456872 : if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL)
3479 : 36 : return redeclaration_error_message (DECL_TEMPLATE_RESULT (newdecl),
3480 : 36 : DECL_TEMPLATE_RESULT (olddecl));
3481 : :
3482 : 3456836 : if (DECL_TEMPLATE_RESULT (newdecl) == DECL_TEMPLATE_RESULT (olddecl))
3483 : : return NULL;
3484 : :
3485 : 3456824 : nt = DECL_TEMPLATE_RESULT (newdecl);
3486 : 3456824 : if (DECL_TEMPLATE_INFO (nt))
3487 : 512075 : nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
3488 : 3456824 : ot = DECL_TEMPLATE_RESULT (olddecl);
3489 : 3456824 : if (DECL_TEMPLATE_INFO (ot))
3490 : 3456824 : ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
3491 : 6086250 : if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
3492 : 3456863 : && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
3493 : 15 : return G_("redefinition of %q#D");
3494 : :
3495 : 4706728 : if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
3496 : : {
3497 : 791092 : bool olda = GNU_INLINE_P (ot);
3498 : 791092 : bool newa = GNU_INLINE_P (nt);
3499 : :
3500 : 791092 : if (olda != newa)
3501 : : {
3502 : 0 : if (newa)
3503 : : return G_("%q+D redeclared inline with "
3504 : : "%<gnu_inline%> attribute");
3505 : : else
3506 : : return G_("%q+D redeclared inline without "
3507 : : "%<gnu_inline%> attribute");
3508 : : }
3509 : : }
3510 : :
3511 : : /* Core issue #226 (C++11):
3512 : :
3513 : : If a friend function template declaration specifies a
3514 : : default template-argument, that declaration shall be a
3515 : : definition and shall be the only declaration of the
3516 : : function template in the translation unit. */
3517 : 3456809 : if ((cxx_dialect != cxx98)
3518 : 3442180 : && TREE_CODE (ot) == FUNCTION_DECL && DECL_UNIQUE_FRIEND_P (ot)
3519 : 3665598 : && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
3520 : : /*is_primary=*/true,
3521 : : /*is_partial=*/false,
3522 : : /*is_friend_decl=*/2))
3523 : : return G_("redeclaration of friend %q#D "
3524 : : "may not have default template arguments");
3525 : :
3526 : 3456806 : return NULL;
3527 : : }
3528 : 375503 : else if (VAR_P (newdecl)
3529 : 375419 : && (CP_DECL_THREAD_LOCAL_P (newdecl)
3530 : 375419 : != CP_DECL_THREAD_LOCAL_P (olddecl))
3531 : 375550 : && (! DECL_LANG_SPECIFIC (olddecl)
3532 : 44 : || ! CP_DECL_THREADPRIVATE_P (olddecl)
3533 : 41 : || CP_DECL_THREAD_LOCAL_P (newdecl)))
3534 : : {
3535 : : /* Only variables can be thread-local, and all declarations must
3536 : : agree on this property. */
3537 : 6 : if (CP_DECL_THREAD_LOCAL_P (newdecl))
3538 : : return G_("thread-local declaration of %q#D follows "
3539 : : "non-thread-local declaration");
3540 : : else
3541 : 3 : return G_("non-thread-local declaration of %q#D follows "
3542 : : "thread-local declaration");
3543 : : }
3544 : 375497 : else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
3545 : : {
3546 : : /* The objects have been declared at namespace scope. If either
3547 : : is a member of an anonymous union, then this is an invalid
3548 : : redeclaration. For example:
3549 : :
3550 : : int i;
3551 : : union { int i; };
3552 : :
3553 : : is invalid. */
3554 : 375344 : if ((VAR_P (newdecl) && DECL_ANON_UNION_VAR_P (newdecl))
3555 : 750757 : || (VAR_P (olddecl) && DECL_ANON_UNION_VAR_P (olddecl)))
3556 : : return G_("redeclaration of %q#D");
3557 : : /* If at least one declaration is a reference, there is no
3558 : : conflict. For example:
3559 : :
3560 : : int i = 3;
3561 : : extern int i;
3562 : :
3563 : : is valid. */
3564 : 375410 : if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
3565 : : return NULL;
3566 : :
3567 : : /* Static data member declared outside a class definition
3568 : : if the variable is defined within the class with constexpr
3569 : : specifier is declaration rather than definition (and
3570 : : deprecated). */
3571 : 2806 : if (cxx_dialect >= cxx17
3572 : 2737 : && VAR_P (olddecl)
3573 : 2681 : && DECL_CLASS_SCOPE_P (olddecl)
3574 : 2649 : && DECL_DECLARED_CONSTEXPR_P (olddecl)
3575 : 5443 : && !DECL_INITIAL (newdecl))
3576 : : {
3577 : 2637 : DECL_EXTERNAL (newdecl) = 1;
3578 : : /* For now, only warn with explicit -Wdeprecated. */
3579 : 2637 : if (OPTION_SET_P (warn_deprecated))
3580 : : {
3581 : 40 : auto_diagnostic_group d;
3582 : 40 : if (warning_at (DECL_SOURCE_LOCATION (newdecl), OPT_Wdeprecated,
3583 : : "redundant redeclaration of %<constexpr%> "
3584 : : "static data member %qD", newdecl))
3585 : 4 : inform (DECL_SOURCE_LOCATION (olddecl),
3586 : : "previous declaration of %qD", olddecl);
3587 : 40 : }
3588 : 2637 : return NULL;
3589 : : }
3590 : :
3591 : : /* Reject two definitions. */
3592 : : return G_("redefinition of %q#D");
3593 : : }
3594 : : else
3595 : : {
3596 : : /* Objects declared with block scope: */
3597 : : /* Reject two definitions, and reject a definition
3598 : : together with an external reference. */
3599 : 72 : if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
3600 : : return G_("redeclaration of %q#D");
3601 : : return NULL;
3602 : : }
3603 : : }
3604 : :
3605 : :
3606 : : /* Hash and equality functions for the named_label table. */
3607 : :
3608 : : hashval_t
3609 : 69870 : named_label_hash::hash (const value_type entry)
3610 : : {
3611 : 69870 : return IDENTIFIER_HASH_VALUE (entry->name);
3612 : : }
3613 : :
3614 : : bool
3615 : 71502 : named_label_hash::equal (const value_type entry, compare_type name)
3616 : : {
3617 : 71502 : return name == entry->name;
3618 : : }
3619 : :
3620 : : /* Look for a label named ID in the current function. If one cannot
3621 : : be found, create one. Return the named_label_entry, or NULL on
3622 : : failure. */
3623 : :
3624 : : static named_label_entry *
3625 : 21268 : lookup_label_1 (tree id, bool making_local_p)
3626 : : {
3627 : 21268 : auto_cond_timevar tv (TV_NAME_LOOKUP);
3628 : :
3629 : : /* You can't use labels at global scope. */
3630 : 21268 : if (current_function_decl == NULL_TREE)
3631 : : {
3632 : 3 : error ("label %qE referenced outside of any function", id);
3633 : 3 : return NULL;
3634 : : }
3635 : :
3636 : 21265 : if (!named_labels)
3637 : 4012 : named_labels = hash_table<named_label_hash>::create_ggc (13);
3638 : :
3639 : 21265 : hashval_t hash = IDENTIFIER_HASH_VALUE (id);
3640 : 21265 : named_label_entry **slot
3641 : 21265 : = named_labels->find_slot_with_hash (id, hash, INSERT);
3642 : 21265 : named_label_entry *old = *slot;
3643 : :
3644 : 21265 : if (old && old->label_decl)
3645 : : {
3646 : 2280 : if (!making_local_p)
3647 : : return old;
3648 : :
3649 : 9 : if (old->binding_level == current_binding_level)
3650 : : {
3651 : 0 : auto_diagnostic_group d;
3652 : 0 : error ("local label %qE conflicts with existing label", id);
3653 : 0 : inform (DECL_SOURCE_LOCATION (old->label_decl), "previous label");
3654 : 0 : return NULL;
3655 : 0 : }
3656 : : }
3657 : :
3658 : : /* We are making a new decl, create or reuse the named_label_entry */
3659 : 19003 : named_label_entry *ent = NULL;
3660 : 21 : if (old && !old->label_decl)
3661 : : ent = old;
3662 : : else
3663 : : {
3664 : 18982 : ent = ggc_cleared_alloc<named_label_entry> ();
3665 : 18982 : ent->name = id;
3666 : 18982 : ent->outer = old;
3667 : 18982 : *slot = ent;
3668 : : }
3669 : :
3670 : : /* Now create the LABEL_DECL. */
3671 : 18994 : tree decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
3672 : :
3673 : 18994 : DECL_CONTEXT (decl) = current_function_decl;
3674 : 18994 : SET_DECL_MODE (decl, VOIDmode);
3675 : 18994 : if (making_local_p)
3676 : : {
3677 : 207 : C_DECLARED_LABEL_FLAG (decl) = true;
3678 : 207 : DECL_CHAIN (decl) = current_binding_level->names;
3679 : 207 : current_binding_level->names = decl;
3680 : : }
3681 : :
3682 : 18994 : ent->label_decl = decl;
3683 : :
3684 : 18994 : return ent;
3685 : 21268 : }
3686 : :
3687 : : /* Wrapper for lookup_label_1. */
3688 : :
3689 : : tree
3690 : 1820 : lookup_label (tree id)
3691 : : {
3692 : 1820 : named_label_entry *ent = lookup_label_1 (id, false);
3693 : 1820 : return ent ? ent->label_decl : NULL_TREE;
3694 : : }
3695 : :
3696 : : /* Remember that we've seen &&ID. */
3697 : :
3698 : : void
3699 : 250 : mark_label_addressed (tree id)
3700 : : {
3701 : 250 : named_label_entry *ent = lookup_label_1 (id, false);
3702 : 250 : ent->addressed = true;
3703 : 250 : }
3704 : :
3705 : : tree
3706 : 207 : declare_local_label (tree id)
3707 : : {
3708 : 207 : named_label_entry *ent = lookup_label_1 (id, true);
3709 : 207 : return ent ? ent->label_decl : NULL_TREE;
3710 : : }
3711 : :
3712 : : /* Returns true if it is ill-formed to jump past the declaration of DECL. */
3713 : :
3714 : : static bool
3715 : 13368 : decl_jump_unsafe (tree decl)
3716 : : {
3717 : : /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3718 : : with automatic storage duration is not in scope to a point where it is
3719 : : in scope is ill-formed unless the variable has scalar type, class type
3720 : : with a trivial default constructor and a trivial destructor, a
3721 : : cv-qualified version of one of these types, or an array of one of the
3722 : : preceding types and is declared without an initializer (8.5). */
3723 : 13368 : tree type = TREE_TYPE (decl);
3724 : :
3725 : 13368 : return (type != error_mark_node
3726 : : && VAR_P (decl)
3727 : 13350 : && !TREE_STATIC (decl)
3728 : 25426 : && (DECL_NONTRIVIALLY_INITIALIZED_P (decl)
3729 : 10739 : || variably_modified_type_p (type, NULL_TREE)));
3730 : : }
3731 : :
3732 : : /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3733 : : to the user. */
3734 : :
3735 : : static bool
3736 : 286 : identify_goto (tree decl, location_t loc, const location_t *locus,
3737 : : diagnostic_t diag_kind, bool computed)
3738 : : {
3739 : 286 : if (computed)
3740 : 43 : diag_kind = DK_WARNING;
3741 : 286 : bool complained
3742 : 373 : = emit_diagnostic (diag_kind, loc, 0,
3743 : : decl ? G_("jump to label %qD")
3744 : : : G_("jump to case label"), decl);
3745 : 286 : if (complained && locus)
3746 : : {
3747 : 199 : if (computed)
3748 : 43 : inform (*locus, " as a possible target of computed goto");
3749 : : else
3750 : 156 : inform (*locus, " from here");
3751 : : }
3752 : 286 : return complained;
3753 : : }
3754 : :
3755 : : /* Check that a single previously seen jump to a newly defined label
3756 : : is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3757 : : the jump context; NAMES are the names in scope in LEVEL at the jump
3758 : : context; LOCUS is the source position of the jump or 0. COMPUTED
3759 : : is a vec of decls if the jump is a computed goto. Returns
3760 : : true if all is well. */
3761 : :
3762 : : static bool
3763 : 1834053 : check_previous_goto_1 (tree decl, cp_binding_level* level, tree names,
3764 : : bool exited_omp, const location_t *locus,
3765 : : vec<tree,va_gc> *computed)
3766 : : {
3767 : 1834053 : auto_diagnostic_group d;
3768 : 1834053 : cp_binding_level *b;
3769 : 1834053 : bool complained = false;
3770 : 1834053 : int identified = 0;
3771 : 1834053 : bool saw_eh = false, saw_omp = false, saw_tm = false, saw_cxif = false;
3772 : 1834053 : bool saw_ceif = false, saw_se = false;
3773 : :
3774 : 1834053 : if (exited_omp)
3775 : : {
3776 : 12 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3777 : : computed);
3778 : 12 : if (complained)
3779 : 12 : inform (input_location, " exits OpenMP structured block");
3780 : : saw_omp = true;
3781 : : identified = 2;
3782 : : }
3783 : :
3784 : 5477391 : for (b = current_binding_level; b ; b = b->level_chain)
3785 : : {
3786 : 3643338 : tree new_decls, old_decls = (b == level ? names : NULL_TREE);
3787 : :
3788 : 3653320 : for (new_decls = b->names; new_decls != old_decls;
3789 : 10383 : new_decls = (DECL_P (new_decls) ? DECL_CHAIN (new_decls)
3790 : 401 : : TREE_CHAIN (new_decls)))
3791 : : {
3792 : 9982 : bool problem = decl_jump_unsafe (new_decls);
3793 : 9982 : if (! problem)
3794 : 9937 : continue;
3795 : :
3796 : 45 : if (!identified)
3797 : : {
3798 : 45 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3799 : : computed);
3800 : 45 : identified = 2;
3801 : : }
3802 : 45 : if (complained)
3803 : 45 : inform (DECL_SOURCE_LOCATION (new_decls),
3804 : : " crosses initialization of %q#D", new_decls);
3805 : : }
3806 : :
3807 : 3643338 : if (b == level)
3808 : : break;
3809 : :
3810 : 1809285 : const char *inf = NULL;
3811 : 1809285 : location_t loc = input_location;
3812 : 1809285 : switch (b->kind)
3813 : : {
3814 : 3 : case sk_try:
3815 : 3 : if (!saw_eh)
3816 : : inf = G_(" enters %<try%> block");
3817 : : saw_eh = true;
3818 : : break;
3819 : :
3820 : 9 : case sk_catch:
3821 : 9 : if (!saw_eh)
3822 : : inf = G_(" enters %<catch%> block");
3823 : : saw_eh = true;
3824 : : break;
3825 : :
3826 : 102 : case sk_omp:
3827 : 102 : if (!saw_omp)
3828 : : inf = G_(" enters OpenMP structured block");
3829 : : saw_omp = true;
3830 : : break;
3831 : :
3832 : 3 : case sk_transaction:
3833 : 3 : if (!saw_tm)
3834 : : inf = G_(" enters synchronized or atomic statement");
3835 : : saw_tm = true;
3836 : : break;
3837 : :
3838 : 18 : case sk_stmt_expr:
3839 : 18 : if (!saw_se)
3840 : : inf = G_(" enters statement expression");
3841 : : saw_se = true;
3842 : : break;
3843 : :
3844 : 1809046 : case sk_block:
3845 : 1809046 : if (!saw_cxif && level_for_constexpr_if (b->level_chain))
3846 : : {
3847 : 9 : inf = G_(" enters %<constexpr if%> statement");
3848 : 9 : loc = EXPR_LOCATION (b->level_chain->this_entity);
3849 : : saw_cxif = true;
3850 : : }
3851 : 1809037 : else if (!saw_ceif && level_for_consteval_if (b->level_chain))
3852 : : {
3853 : 18 : inf = G_(" enters %<consteval if%> statement");
3854 : 18 : loc = EXPR_LOCATION (b->level_chain->this_entity);
3855 : : saw_ceif = true;
3856 : : }
3857 : : break;
3858 : :
3859 : : default:
3860 : : break;
3861 : : }
3862 : :
3863 : : if (inf)
3864 : : {
3865 : 141 : if (identified < 2)
3866 : 141 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3867 : : computed);
3868 : 141 : identified = 2;
3869 : 141 : if (complained)
3870 : 141 : inform (loc, inf);
3871 : : }
3872 : : }
3873 : :
3874 : 1834053 : if (!vec_safe_is_empty (computed))
3875 : : {
3876 : 9 : if (!identified)
3877 : 6 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3878 : : computed);
3879 : 9 : identified = 2;
3880 : 9 : if (complained)
3881 : 18 : for (tree d : computed)
3882 : : {
3883 : 9 : if (DECL_P (d))
3884 : 6 : inform (DECL_SOURCE_LOCATION (d), " does not destroy %qD", d);
3885 : 3 : else if (d == get_identifier ("catch"))
3886 : 3 : inform (*locus, " does not clean up handled exception");
3887 : : }
3888 : : }
3889 : :
3890 : 3668106 : return !identified;
3891 : 1834053 : }
3892 : :
3893 : : static void
3894 : 1127 : check_previous_goto (tree decl, struct named_label_use_entry *use)
3895 : : {
3896 : 1127 : check_previous_goto_1 (decl, use->binding_level,
3897 : 1127 : use->names_in_scope, use->in_omp_scope,
3898 : 1127 : &use->o_goto_locus, use->computed_goto);
3899 : 1127 : }
3900 : :
3901 : : static bool
3902 : 1832926 : check_switch_goto (cp_binding_level* level)
3903 : : {
3904 : 1832926 : return check_previous_goto_1 (NULL_TREE, level, level->names,
3905 : 1832926 : false, NULL, nullptr);
3906 : : }
3907 : :
3908 : : /* Check that a new jump to a label ENT is OK. COMPUTED is true
3909 : : if this is a possible target of a computed goto. */
3910 : :
3911 : : void
3912 : 1698 : check_goto_1 (named_label_entry *ent, bool computed)
3913 : : {
3914 : 1698 : auto_diagnostic_group d;
3915 : 1698 : tree decl = ent->label_decl;
3916 : :
3917 : : /* If the label hasn't been defined yet, defer checking. */
3918 : 1698 : if (! DECL_INITIAL (decl))
3919 : : {
3920 : : /* Don't bother creating another use if the last goto had the
3921 : : same data, and will therefore create the same set of errors. */
3922 : 1280 : if (ent->uses
3923 : 240 : && ent->uses->names_in_scope == current_binding_level->names)
3924 : : return;
3925 : :
3926 : 1136 : named_label_use_entry *new_use
3927 : 1136 : = ggc_alloc<named_label_use_entry> ();
3928 : 1136 : new_use->binding_level = current_binding_level;
3929 : 1136 : new_use->names_in_scope = current_binding_level->names;
3930 : 1136 : new_use->o_goto_locus = input_location;
3931 : 1136 : new_use->in_omp_scope = false;
3932 : 1136 : new_use->computed_goto = computed ? make_tree_vector () : nullptr;
3933 : :
3934 : 1136 : new_use->next = ent->uses;
3935 : 1136 : ent->uses = new_use;
3936 : 1136 : return;
3937 : : }
3938 : :
3939 : 418 : bool saw_catch = false, complained = false;
3940 : 418 : int identified = 0;
3941 : 418 : tree bad;
3942 : 418 : unsigned ix;
3943 : :
3944 : 409 : if (ent->in_try_scope || ent->in_catch_scope || ent->in_transaction_scope
3945 : 403 : || ent->in_constexpr_if || ent->in_consteval_if
3946 : 397 : || ent->in_omp_scope || ent->in_stmt_expr
3947 : 797 : || !vec_safe_is_empty (ent->bad_decls))
3948 : : {
3949 : 45 : diagnostic_t diag_kind = DK_PERMERROR;
3950 : 45 : if (ent->in_try_scope || ent->in_catch_scope || ent->in_constexpr_if
3951 : 30 : || ent->in_consteval_if || ent->in_transaction_scope
3952 : 24 : || ent->in_omp_scope || ent->in_stmt_expr)
3953 : 39 : diag_kind = DK_ERROR;
3954 : 45 : complained = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
3955 : : &input_location, diag_kind, computed);
3956 : 45 : identified = 1 + (diag_kind == DK_ERROR);
3957 : : }
3958 : :
3959 : 424 : FOR_EACH_VEC_SAFE_ELT (ent->bad_decls, ix, bad)
3960 : : {
3961 : 6 : bool problem = decl_jump_unsafe (bad);
3962 : :
3963 : 6 : if (problem && DECL_ARTIFICIAL (bad))
3964 : : {
3965 : : /* Can't skip init of __exception_info. */
3966 : 0 : if (identified == 1)
3967 : : {
3968 : 0 : complained = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
3969 : : &input_location, DK_ERROR, computed);
3970 : 0 : identified = 2;
3971 : : }
3972 : 0 : if (complained)
3973 : 0 : inform (DECL_SOURCE_LOCATION (bad), " enters %<catch%> block");
3974 : : saw_catch = true;
3975 : : }
3976 : 6 : else if (complained)
3977 : 6 : inform (DECL_SOURCE_LOCATION (bad),
3978 : : " skips initialization of %q#D", bad);
3979 : : }
3980 : :
3981 : 418 : if (complained)
3982 : : {
3983 : 45 : if (ent->in_try_scope)
3984 : 9 : inform (input_location, " enters %<try%> block");
3985 : 36 : else if (ent->in_catch_scope && !saw_catch)
3986 : 3 : inform (input_location, " enters %<catch%> block");
3987 : 33 : else if (ent->in_transaction_scope)
3988 : 3 : inform (input_location, " enters synchronized or atomic statement");
3989 : 30 : else if (ent->in_constexpr_if)
3990 : 3 : inform (input_location, " enters %<constexpr if%> statement");
3991 : 27 : else if (ent->in_consteval_if)
3992 : 3 : inform (input_location, " enters %<consteval if%> statement");
3993 : 24 : else if (ent->in_stmt_expr)
3994 : 15 : inform (input_location, " enters statement expression");
3995 : : }
3996 : :
3997 : 418 : if (ent->in_omp_scope)
3998 : : {
3999 : 3 : if (complained)
4000 : 3 : inform (input_location, " enters OpenMP structured block");
4001 : : }
4002 : 415 : else if (flag_openmp)
4003 : 69 : for (cp_binding_level *b = current_binding_level; b ; b = b->level_chain)
4004 : : {
4005 : 42 : if (b == ent->binding_level)
4006 : : break;
4007 : 36 : if (b->kind == sk_omp)
4008 : : {
4009 : 21 : if (identified < 2)
4010 : : {
4011 : 42 : complained = identify_goto (decl,
4012 : 21 : DECL_SOURCE_LOCATION (decl),
4013 : : &input_location, DK_ERROR,
4014 : : computed);
4015 : 21 : identified = 2;
4016 : : }
4017 : 21 : if (complained)
4018 : 21 : inform (input_location, " exits OpenMP structured block");
4019 : : break;
4020 : : }
4021 : : }
4022 : :
4023 : : /* Warn if a computed goto might involve a local variable going out of scope
4024 : : without being cleaned up. */
4025 : 418 : if (computed)
4026 : : {
4027 : 71 : auto level = ent->binding_level;
4028 : 71 : auto names = ent->names_in_scope;
4029 : 71 : for (auto b = current_binding_level; ; b = b->level_chain)
4030 : : {
4031 : 111 : if (b->kind == sk_catch)
4032 : : {
4033 : 6 : if (!identified)
4034 : : {
4035 : 6 : complained
4036 : 6 : = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
4037 : : &input_location, DK_ERROR, computed);
4038 : 6 : identified = 2;
4039 : : }
4040 : 6 : if (complained)
4041 : 6 : inform (input_location,
4042 : : " does not clean up handled exception");
4043 : : }
4044 : 111 : tree end = b == level ? names : NULL_TREE;
4045 : 127 : for (tree d = b->names; d != end; d = DECL_CHAIN (d))
4046 : : {
4047 : 16 : if (automatic_var_with_nontrivial_dtor_p (d))
4048 : : {
4049 : 10 : if (!identified)
4050 : : {
4051 : 10 : complained
4052 : 10 : = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
4053 : : &input_location, DK_ERROR, computed);
4054 : 10 : identified = 2;
4055 : : }
4056 : 10 : if (complained)
4057 : 10 : inform (DECL_SOURCE_LOCATION (d),
4058 : : " does not destroy %qD", d);
4059 : : }
4060 : : }
4061 : 111 : if (b == level)
4062 : : break;
4063 : 40 : }
4064 : : }
4065 : 1698 : }
4066 : :
4067 : : /* Check that a new jump to a label DECL is OK. Called by
4068 : : finish_goto_stmt. */
4069 : :
4070 : : void
4071 : 1658 : check_goto (tree decl)
4072 : : {
4073 : 1658 : if (!named_labels)
4074 : : return;
4075 : 1643 : if (TREE_CODE (decl) != LABEL_DECL)
4076 : : {
4077 : : /* We don't know where a computed goto is jumping,
4078 : : so check all addressable labels. */
4079 : 306 : for (auto iter = named_labels->begin ();
4080 : 416 : iter != named_labels->end ();
4081 : 196 : ++iter)
4082 : : {
4083 : 196 : auto ent = *iter;
4084 : 196 : if (ent->addressed)
4085 : 165 : check_goto_1 (ent, true);
4086 : : }
4087 : : }
4088 : : else
4089 : : {
4090 : 1533 : hashval_t hash = IDENTIFIER_HASH_VALUE (DECL_NAME (decl));
4091 : 1533 : named_label_entry **slot
4092 : 1533 : = named_labels->find_slot_with_hash (DECL_NAME (decl), hash, NO_INSERT);
4093 : 1533 : named_label_entry *ent = *slot;
4094 : 1533 : check_goto_1 (ent, false);
4095 : : }
4096 : : }
4097 : :
4098 : : /* Check that a return is ok wrt OpenMP structured blocks.
4099 : : Called by finish_return_stmt. Returns true if all is well. */
4100 : :
4101 : : bool
4102 : 115019 : check_omp_return (void)
4103 : : {
4104 : 448379 : for (cp_binding_level *b = current_binding_level; b ; b = b->level_chain)
4105 : 333360 : if (b->kind == sk_omp)
4106 : : {
4107 : 15 : error ("invalid exit from OpenMP structured block");
4108 : 15 : return false;
4109 : : }
4110 : 333345 : else if (b->kind == sk_function_parms)
4111 : : break;
4112 : : return true;
4113 : : }
4114 : :
4115 : : /* Define a label, specifying the location in the source file.
4116 : : Return the LABEL_DECL node for the label. */
4117 : :
4118 : : tree
4119 : 18991 : define_label (location_t location, tree name)
4120 : : {
4121 : 18991 : auto_cond_timevar tv (TV_NAME_LOOKUP);
4122 : :
4123 : : /* After labels, make any new cleanups in the function go into their
4124 : : own new (temporary) binding contour. */
4125 : 18991 : for (cp_binding_level *p = current_binding_level;
4126 : 27233 : p->kind != sk_function_parms;
4127 : 8242 : p = p->level_chain)
4128 : 8242 : p->more_cleanups_ok = 0;
4129 : :
4130 : 18991 : named_label_entry *ent = lookup_label_1 (name, false);
4131 : 18991 : tree decl = ent->label_decl;
4132 : :
4133 : 18991 : if (DECL_INITIAL (decl) != NULL_TREE)
4134 : : {
4135 : 6 : error ("duplicate label %qD", decl);
4136 : 6 : return error_mark_node;
4137 : : }
4138 : : else
4139 : : {
4140 : : /* Mark label as having been defined. */
4141 : 18985 : DECL_INITIAL (decl) = error_mark_node;
4142 : : /* Say where in the source. */
4143 : 18985 : DECL_SOURCE_LOCATION (decl) = location;
4144 : :
4145 : 18985 : ent->binding_level = current_binding_level;
4146 : 18985 : ent->names_in_scope = current_binding_level->names;
4147 : :
4148 : 20112 : for (named_label_use_entry *use = ent->uses; use; use = use->next)
4149 : 1127 : check_previous_goto (decl, use);
4150 : 18985 : ent->uses = NULL;
4151 : : }
4152 : :
4153 : 18985 : return decl;
4154 : 18991 : }
4155 : :
4156 : : struct cp_switch
4157 : : {
4158 : : cp_binding_level *level;
4159 : : struct cp_switch *next;
4160 : : /* The SWITCH_STMT being built. */
4161 : : tree switch_stmt;
4162 : : /* A splay-tree mapping the low element of a case range to the high
4163 : : element, or NULL_TREE if there is no high element. Used to
4164 : : determine whether or not a new case label duplicates an old case
4165 : : label. We need a tree, rather than simply a hash table, because
4166 : : of the GNU case range extension. */
4167 : : splay_tree cases;
4168 : : /* Remember whether a default: case label has been seen. */
4169 : : bool has_default_p;
4170 : : /* Remember whether a BREAK_STMT has been seen in this SWITCH_STMT. */
4171 : : bool break_stmt_seen_p;
4172 : : /* Set if inside of {FOR,DO,WHILE}_BODY nested inside of a switch,
4173 : : where BREAK_STMT doesn't belong to the SWITCH_STMT. */
4174 : : bool in_loop_body_p;
4175 : : };
4176 : :
4177 : : /* A stack of the currently active switch statements. The innermost
4178 : : switch statement is on the top of the stack. There is no need to
4179 : : mark the stack for garbage collection because it is only active
4180 : : during the processing of the body of a function, and we never
4181 : : collect at that point. */
4182 : :
4183 : : static struct cp_switch *switch_stack;
4184 : :
4185 : : /* Called right after a switch-statement condition is parsed.
4186 : : SWITCH_STMT is the switch statement being parsed. */
4187 : :
4188 : : void
4189 : 453210 : push_switch (tree switch_stmt)
4190 : : {
4191 : 453210 : struct cp_switch *p = XNEW (struct cp_switch);
4192 : 453210 : p->level = current_binding_level;
4193 : 453210 : p->next = switch_stack;
4194 : 453210 : p->switch_stmt = switch_stmt;
4195 : 453210 : p->cases = splay_tree_new (case_compare, NULL, NULL);
4196 : 453210 : p->has_default_p = false;
4197 : 453210 : p->break_stmt_seen_p = false;
4198 : 453210 : p->in_loop_body_p = false;
4199 : 453210 : switch_stack = p;
4200 : 453210 : }
4201 : :
4202 : : void
4203 : 453210 : pop_switch (void)
4204 : : {
4205 : 453210 : struct cp_switch *cs = switch_stack;
4206 : :
4207 : : /* Emit warnings as needed. */
4208 : 453210 : location_t switch_location = cp_expr_loc_or_input_loc (cs->switch_stmt);
4209 : 453210 : tree cond = SWITCH_STMT_COND (cs->switch_stmt);
4210 : 453210 : const bool bool_cond_p
4211 : 453210 : = (SWITCH_STMT_TYPE (cs->switch_stmt)
4212 : 453210 : && TREE_CODE (SWITCH_STMT_TYPE (cs->switch_stmt)) == BOOLEAN_TYPE);
4213 : 453210 : if (!processing_template_decl)
4214 : 292312 : c_do_switch_warnings (cs->cases, switch_location,
4215 : 292312 : SWITCH_STMT_TYPE (cs->switch_stmt), cond,
4216 : : bool_cond_p);
4217 : :
4218 : : /* For the benefit of block_may_fallthru remember if the switch body
4219 : : case labels cover all possible values and if there are break; stmts. */
4220 : 453210 : if (cs->has_default_p
4221 : 453210 : || (!processing_template_decl
4222 : 34335 : && c_switch_covers_all_cases_p (cs->cases,
4223 : 34335 : SWITCH_STMT_TYPE (cs->switch_stmt))))
4224 : 357997 : SWITCH_STMT_ALL_CASES_P (cs->switch_stmt) = 1;
4225 : 453210 : if (!cs->break_stmt_seen_p)
4226 : 229034 : SWITCH_STMT_NO_BREAK_P (cs->switch_stmt) = 1;
4227 : : /* Now that we're done with the switch warnings, set the switch type
4228 : : to the type of the condition if the index type was of scoped enum type.
4229 : : (Such types don't participate in the integer promotions.) We do this
4230 : : because of bit-fields whose declared type is a scoped enum type:
4231 : : gimplification will use the lowered index type, but convert the
4232 : : case values to SWITCH_STMT_TYPE, which would have been the declared type
4233 : : and verify_gimple_switch doesn't accept that. */
4234 : 453210 : if (is_bitfield_expr_with_lowered_type (cond))
4235 : 13 : SWITCH_STMT_TYPE (cs->switch_stmt) = TREE_TYPE (cond);
4236 : 453210 : gcc_assert (!cs->in_loop_body_p);
4237 : 453210 : splay_tree_delete (cs->cases);
4238 : 453210 : switch_stack = switch_stack->next;
4239 : 453210 : free (cs);
4240 : 453210 : }
4241 : :
4242 : : /* Note that a BREAK_STMT is about to be added. If it is inside of
4243 : : a SWITCH_STMT and not inside of a loop body inside of it, note
4244 : : in switch_stack we've seen a BREAK_STMT. */
4245 : :
4246 : : void
4247 : 3373899 : note_break_stmt (void)
4248 : : {
4249 : 3373899 : if (switch_stack && !switch_stack->in_loop_body_p)
4250 : 1444829 : switch_stack->break_stmt_seen_p = true;
4251 : 3373899 : }
4252 : :
4253 : : /* Note the start of processing of an iteration statement's body.
4254 : : The note_break_stmt function will do nothing while processing it.
4255 : : Return a flag that should be passed to note_iteration_stmt_body_end. */
4256 : :
4257 : : bool
4258 : 14928310 : note_iteration_stmt_body_start (void)
4259 : : {
4260 : 14928310 : if (!switch_stack)
4261 : : return false;
4262 : 112392 : bool ret = switch_stack->in_loop_body_p;
4263 : 112392 : switch_stack->in_loop_body_p = true;
4264 : 112392 : return ret;
4265 : : }
4266 : :
4267 : : /* Note the end of processing of an iteration statement's body. */
4268 : :
4269 : : void
4270 : 14928310 : note_iteration_stmt_body_end (bool prev)
4271 : : {
4272 : 14928310 : if (switch_stack)
4273 : 112392 : switch_stack->in_loop_body_p = prev;
4274 : 14928310 : }
4275 : :
4276 : : /* Convert a case constant VALUE in a switch to the type TYPE of the switch
4277 : : condition. Note that if TYPE and VALUE are already integral we don't
4278 : : really do the conversion because the language-independent
4279 : : warning/optimization code will work better that way. */
4280 : :
4281 : : static tree
4282 : 3665606 : case_conversion (tree type, tree value)
4283 : : {
4284 : 3665606 : if (value == NULL_TREE)
4285 : : return value;
4286 : :
4287 : 1574988 : value = mark_rvalue_use (value);
4288 : :
4289 : 1574988 : if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
4290 : 1546225 : type = type_promotes_to (type);
4291 : :
4292 : 1574988 : tree ovalue = value;
4293 : : /* The constant-expression VALUE shall be a converted constant expression
4294 : : of the adjusted type of the switch condition, which doesn't allow
4295 : : narrowing conversions. */
4296 : 1574988 : value = build_converted_constant_expr (type, value, tf_warning_or_error);
4297 : :
4298 : 1574988 : if (cxx_dialect >= cxx11
4299 : 1574988 : && (SCOPED_ENUM_P (type)
4300 : 1543507 : || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ovalue))))
4301 : : /* Use the converted value. */;
4302 : : else
4303 : : /* The already integral case. */
4304 : : value = ovalue;
4305 : :
4306 : 1574988 : return cxx_constant_value (value);
4307 : : }
4308 : :
4309 : : /* Note that we've seen a definition of a case label, and complain if this
4310 : : is a bad place for one. */
4311 : :
4312 : : tree
4313 : 3342919 : finish_case_label (location_t loc, tree low_value, tree high_value)
4314 : : {
4315 : 3342919 : tree cond, r;
4316 : 3342919 : cp_binding_level *p;
4317 : 3342919 : tree type;
4318 : :
4319 : 3342919 : if (low_value == NULL_TREE && high_value == NULL_TREE)
4320 : 357961 : switch_stack->has_default_p = true;
4321 : :
4322 : 3342919 : if (processing_template_decl)
4323 : : {
4324 : 1509993 : tree label;
4325 : :
4326 : : /* For templates, just add the case label; we'll do semantic
4327 : : analysis at instantiation-time. */
4328 : 1509993 : label = build_decl (loc, LABEL_DECL, NULL_TREE, void_type_node);
4329 : 1509993 : return add_stmt (build_case_label (low_value, high_value, label));
4330 : : }
4331 : :
4332 : : /* Find the condition on which this switch statement depends. */
4333 : 1832926 : cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
4334 : 1832926 : if (cond && TREE_CODE (cond) == TREE_LIST)
4335 : 0 : cond = TREE_VALUE (cond);
4336 : :
4337 : 1832926 : if (!check_switch_goto (switch_stack->level))
4338 : 87 : return error_mark_node;
4339 : :
4340 : 1832839 : type = SWITCH_STMT_TYPE (switch_stack->switch_stmt);
4341 : 1832839 : if (type == error_mark_node)
4342 : : return error_mark_node;
4343 : :
4344 : 1832803 : low_value = case_conversion (type, low_value);
4345 : 1832803 : high_value = case_conversion (type, high_value);
4346 : :
4347 : 1832803 : r = c_add_case_label (loc, switch_stack->cases, cond, low_value, high_value);
4348 : :
4349 : : /* After labels, make any new cleanups in the function go into their
4350 : : own new (temporary) binding contour. */
4351 : 1832803 : for (p = current_binding_level;
4352 : 7739121 : p->kind != sk_function_parms;
4353 : 5906318 : p = p->level_chain)
4354 : 5906318 : p->more_cleanups_ok = 0;
4355 : :
4356 : : return r;
4357 : : }
4358 : :
4359 : : struct typename_info {
4360 : : tree scope;
4361 : : tree name;
4362 : : tree template_id;
4363 : : bool enum_p;
4364 : : bool class_p;
4365 : : };
4366 : :
4367 : : struct typename_hasher : ggc_ptr_hash<tree_node>
4368 : : {
4369 : : typedef typename_info *compare_type;
4370 : :
4371 : : /* Hash a TYPENAME_TYPE. */
4372 : :
4373 : : static hashval_t
4374 : 374197863 : hash (tree context, tree fullname)
4375 : : {
4376 : 374197863 : hashval_t hash = 0;
4377 : 374197863 : hash = iterative_hash_object (context, hash);
4378 : 374197863 : hash = iterative_hash_object (fullname, hash);
4379 : 374197863 : return hash;
4380 : : }
4381 : :
4382 : : static hashval_t
4383 : 54481525 : hash (const typename_info *ti)
4384 : : {
4385 : 54481525 : return typename_hasher::hash (ti->scope, ti->template_id);
4386 : : }
4387 : :
4388 : : static hashval_t
4389 : 319716338 : hash (tree t)
4390 : : {
4391 : 319716338 : return typename_hasher::hash (TYPE_CONTEXT (t), TYPENAME_TYPE_FULLNAME (t));
4392 : : }
4393 : :
4394 : : /* Compare two TYPENAME_TYPEs. */
4395 : :
4396 : : static bool
4397 : 371280102 : equal (tree t1, const typename_info *t2)
4398 : : {
4399 : 371280102 : return (TYPE_IDENTIFIER (t1) == t2->name
4400 : 111463311 : && TYPE_CONTEXT (t1) == t2->scope
4401 : 27890935 : && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
4402 : 27881184 : && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
4403 : 399161232 : && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
4404 : : }
4405 : : };
4406 : :
4407 : : /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
4408 : : the type of `T', NAME is the IDENTIFIER_NODE for `t'.
4409 : :
4410 : : Returns the new TYPENAME_TYPE. */
4411 : :
4412 : : static GTY (()) hash_table<typename_hasher> *typename_htab;
4413 : :
4414 : : tree
4415 : 54481525 : build_typename_type (tree context, tree name, tree fullname,
4416 : : enum tag_types tag_type)
4417 : : {
4418 : 54481525 : typename_info ti;
4419 : :
4420 : 54481525 : if (typename_htab == NULL)
4421 : 18328 : typename_htab = hash_table<typename_hasher>::create_ggc (61);
4422 : :
4423 : 54481525 : ti.scope = FROB_CONTEXT (context);
4424 : 54481525 : ti.name = name;
4425 : 54481525 : ti.template_id = fullname;
4426 : 54481525 : ti.enum_p = tag_type == enum_type;
4427 : 54481525 : ti.class_p = (tag_type == class_type
4428 : : || tag_type == record_type
4429 : 54481525 : || tag_type == union_type);
4430 : 54481525 : hashval_t hash = typename_hasher::hash (&ti);
4431 : :
4432 : : /* See if we already have this type. */
4433 : 54481525 : tree *e = typename_htab->find_slot_with_hash (&ti, hash, INSERT);
4434 : 54481525 : tree t = *e;
4435 : 54481525 : if (*e)
4436 : : t = *e;
4437 : : else
4438 : : {
4439 : : /* Build the TYPENAME_TYPE. */
4440 : 26600419 : t = cxx_make_type (TYPENAME_TYPE);
4441 : 26600419 : TYPE_CONTEXT (t) = ti.scope;
4442 : 26600419 : TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
4443 : 26600419 : TYPENAME_IS_ENUM_P (t) = ti.enum_p;
4444 : 26600419 : TYPENAME_IS_CLASS_P (t) = ti.class_p;
4445 : :
4446 : : /* Build the corresponding TYPE_DECL. */
4447 : 26600419 : tree d = build_decl (input_location, TYPE_DECL, name, t);
4448 : 26600419 : TYPE_NAME (t) = d;
4449 : 26600419 : TYPE_STUB_DECL (t) = d;
4450 : 26600419 : DECL_CONTEXT (d) = ti.scope;
4451 : 26600419 : DECL_ARTIFICIAL (d) = 1;
4452 : :
4453 : : /* Store it in the hash table. */
4454 : 26600419 : *e = t;
4455 : :
4456 : : /* TYPENAME_TYPEs must always be compared structurally, because
4457 : : they may or may not resolve down to another type depending on
4458 : : the currently open classes. */
4459 : 26600419 : SET_TYPE_STRUCTURAL_EQUALITY (t);
4460 : : }
4461 : :
4462 : 54481525 : return t;
4463 : : }
4464 : :
4465 : : /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
4466 : : provided to name the type. Returns an appropriate type, unless an
4467 : : error occurs, in which case error_mark_node is returned. If we
4468 : : locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
4469 : : return that, rather than the _TYPE it corresponds to, in other
4470 : : cases we look through the type decl. If TF_ERROR is set, complain
4471 : : about errors, otherwise be quiet. */
4472 : :
4473 : : tree
4474 : 186304197 : make_typename_type (tree context, tree name, enum tag_types tag_type,
4475 : : tsubst_flags_t complain)
4476 : : {
4477 : 186304197 : tree fullname;
4478 : 186304197 : tree t;
4479 : 186304197 : bool want_template;
4480 : :
4481 : 186304197 : if (name == error_mark_node
4482 : 186304195 : || context == NULL_TREE
4483 : 186304195 : || context == error_mark_node)
4484 : : return error_mark_node;
4485 : :
4486 : 186304182 : if (TYPE_P (name))
4487 : : {
4488 : 0 : if (!(TYPE_LANG_SPECIFIC (name)
4489 : 0 : && (CLASSTYPE_IS_TEMPLATE (name)
4490 : 0 : || CLASSTYPE_USE_TEMPLATE (name))))
4491 : 0 : name = TYPE_IDENTIFIER (name);
4492 : : else
4493 : : /* Create a TEMPLATE_ID_EXPR for the type. */
4494 : 0 : name = build_nt (TEMPLATE_ID_EXPR,
4495 : 0 : CLASSTYPE_TI_TEMPLATE (name),
4496 : 0 : CLASSTYPE_TI_ARGS (name));
4497 : : }
4498 : 186304182 : else if (TREE_CODE (name) == TYPE_DECL)
4499 : 0 : name = DECL_NAME (name);
4500 : :
4501 : 186304182 : fullname = name;
4502 : :
4503 : 186304182 : if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
4504 : : {
4505 : 5938664 : name = TREE_OPERAND (name, 0);
4506 : 5938664 : if (DECL_TYPE_TEMPLATE_P (name))
4507 : 0 : name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
4508 : 5938664 : if (TREE_CODE (name) != IDENTIFIER_NODE)
4509 : : {
4510 : 0 : if (complain & tf_error)
4511 : 0 : error ("%qD is not a type", name);
4512 : 0 : return error_mark_node;
4513 : : }
4514 : : }
4515 : 186304182 : if (TREE_CODE (name) == TEMPLATE_DECL)
4516 : : {
4517 : 0 : if (complain & tf_error)
4518 : 0 : error ("%qD used without template arguments", name);
4519 : 0 : return error_mark_node;
4520 : : }
4521 : 186304182 : else if (is_overloaded_fn (name))
4522 : : {
4523 : 3 : if (complain & tf_error)
4524 : 3 : error ("%qD is a function, not a type", name);
4525 : 3 : return error_mark_node;
4526 : : }
4527 : 186304179 : gcc_assert (identifier_p (name));
4528 : 186304179 : gcc_assert (TYPE_P (context));
4529 : :
4530 : 186304179 : if (TREE_CODE (context) == TYPE_PACK_EXPANSION)
4531 : : /* This can happen for C++17 variadic using (c++/88986). */;
4532 : 174984900 : else if (!MAYBE_CLASS_TYPE_P (context))
4533 : : {
4534 : 6 : if (complain & tf_error)
4535 : 6 : error ("%q#T is not a class", context);
4536 : 6 : return error_mark_node;
4537 : : }
4538 : :
4539 : : /* When the CONTEXT is a dependent type, NAME could refer to a
4540 : : dependent base class of CONTEXT. But look inside it anyway
4541 : : if CONTEXT is a currently open scope, in case it refers to a
4542 : : member of the current instantiation or a non-dependent base;
4543 : : lookup will stop when we hit a dependent base. */
4544 : 186304173 : if (!dependent_scope_p (context))
4545 : : {
4546 : : /* We generally don't ignore non-types during TYPENAME_TYPE lookup
4547 : : (as per [temp.res.general]/3), unless
4548 : : - the tag corresponds to a class-key or 'enum' so
4549 : : [basic.lookup.elab] applies, or
4550 : : - the tag corresponds to scope_type or tf_qualifying_scope is
4551 : : set so [basic.lookup.qual]/1 applies.
4552 : : TODO: If we'd set/track the scope_type tag thoroughly on all
4553 : : TYPENAME_TYPEs that are followed by :: then we wouldn't need the
4554 : : tf_qualifying_scope flag. */
4555 : 271552992 : bool want_type = (tag_type != none_type && tag_type != typename_type)
4556 : 135776496 : || (complain & tf_qualifying_scope);
4557 : 135776496 : t = lookup_member (context, name, /*protect=*/2, want_type, complain);
4558 : : }
4559 : : else
4560 : : t = NULL_TREE;
4561 : :
4562 : 203344375 : if ((!t || TREE_CODE (t) == TREE_LIST) && dependentish_scope_p (context))
4563 : 50528595 : return build_typename_type (context, name, fullname, tag_type);
4564 : :
4565 : 135775578 : want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
4566 : :
4567 : 135775578 : if (!t)
4568 : : {
4569 : 17039284 : if (complain & tf_error)
4570 : : {
4571 : 231 : if (!COMPLETE_TYPE_P (context))
4572 : 18 : cxx_incomplete_type_error (NULL_TREE, context);
4573 : : else
4574 : 425 : error (want_template ? G_("no class template named %q#T in %q#T")
4575 : : : G_("no type named %q#T in %q#T"), name, context);
4576 : : }
4577 : 17039284 : return error_mark_node;
4578 : : }
4579 : :
4580 : : /* Pull out the template from an injected-class-name (or multiple). */
4581 : 118736294 : if (want_template)
4582 : 4558051 : t = maybe_get_template_decl_from_type_decl (t);
4583 : :
4584 : 118736294 : if (TREE_CODE (t) == TREE_LIST)
4585 : : {
4586 : 3 : if (complain & tf_error)
4587 : : {
4588 : 3 : auto_diagnostic_group d;
4589 : 3 : error ("lookup of %qT in %qT is ambiguous", name, context);
4590 : 3 : print_candidates (t);
4591 : 3 : }
4592 : 3 : return error_mark_node;
4593 : : }
4594 : :
4595 : 118736291 : if (want_template && !DECL_TYPE_TEMPLATE_P (t))
4596 : : {
4597 : 6 : if (complain & tf_error)
4598 : 6 : error ("%<typename %T::%D%> names %q#T, which is not a class template",
4599 : : context, name, t);
4600 : 6 : return error_mark_node;
4601 : : }
4602 : 118736285 : if (!want_template && TREE_CODE (t) != TYPE_DECL)
4603 : : {
4604 : 15 : if ((complain & tf_tst_ok) && cxx_dialect >= cxx17
4605 : 33 : && DECL_TYPE_TEMPLATE_P (t))
4606 : : /* The caller permits this typename-specifier to name a template
4607 : : (because it appears in a CTAD-enabled context). */;
4608 : : else
4609 : : {
4610 : 23 : if (complain & tf_error)
4611 : 17 : error ("%<typename %T::%D%> names %q#D, which is not a type",
4612 : : context, name, t);
4613 : 23 : return error_mark_node;
4614 : : }
4615 : : }
4616 : :
4617 : 118736262 : if (!check_accessibility_of_qualified_id (t, /*object_type=*/NULL_TREE,
4618 : : context, complain))
4619 : 45 : return error_mark_node;
4620 : :
4621 : 118736217 : if (!want_template && DECL_TYPE_TEMPLATE_P (t))
4622 : 4 : return make_template_placeholder (t);
4623 : :
4624 : 118736213 : if (want_template)
4625 : : {
4626 : 4558045 : t = lookup_template_class (t, TREE_OPERAND (fullname, 1),
4627 : : NULL_TREE, context,
4628 : : complain | tf_user);
4629 : 4558045 : if (t == error_mark_node)
4630 : : return error_mark_node;
4631 : 4558040 : t = TYPE_NAME (t);
4632 : : }
4633 : :
4634 : 118736208 : if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
4635 : 3272843 : t = TREE_TYPE (t);
4636 : :
4637 : 118736208 : maybe_record_typedef_use (t);
4638 : :
4639 : 118736208 : return t;
4640 : : }
4641 : :
4642 : : /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
4643 : : can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
4644 : : in which case error_mark_node is returned.
4645 : :
4646 : : If PARM_LIST is non-NULL, also make sure that the template parameter
4647 : : list of TEMPLATE_DECL matches.
4648 : :
4649 : : If COMPLAIN zero, don't complain about any errors that occur. */
4650 : :
4651 : : tree
4652 : 77808 : make_unbound_class_template (tree context, tree name, tree parm_list,
4653 : : tsubst_flags_t complain)
4654 : : {
4655 : 77808 : if (TYPE_P (name))
4656 : 0 : name = TYPE_IDENTIFIER (name);
4657 : 77808 : else if (DECL_P (name))
4658 : 0 : name = DECL_NAME (name);
4659 : 77808 : gcc_assert (identifier_p (name));
4660 : :
4661 : 77808 : if (!dependent_type_p (context)
4662 : 77808 : || currently_open_class (context))
4663 : : {
4664 : 25602 : tree tmpl = NULL_TREE;
4665 : :
4666 : 25602 : if (MAYBE_CLASS_TYPE_P (context))
4667 : 25596 : tmpl = lookup_field (context, name, 0, false);
4668 : :
4669 : 25596 : if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
4670 : 3 : tmpl = maybe_get_template_decl_from_type_decl (tmpl);
4671 : :
4672 : 25590 : if (!tmpl || !DECL_TYPE_TEMPLATE_P (tmpl))
4673 : : {
4674 : 12 : if (complain & tf_error)
4675 : 9 : error ("no class template named %q#T in %q#T", name, context);
4676 : 12 : return error_mark_node;
4677 : : }
4678 : :
4679 : 25590 : if (parm_list
4680 : 25590 : && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
4681 : : {
4682 : 0 : if (complain & tf_error)
4683 : : {
4684 : 0 : auto_diagnostic_group d;
4685 : 0 : error ("template parameters do not match template %qD", tmpl);
4686 : 0 : inform (DECL_SOURCE_LOCATION (tmpl),
4687 : : "%qD declared here", tmpl);
4688 : 0 : }
4689 : 0 : return error_mark_node;
4690 : : }
4691 : :
4692 : 25590 : if (!perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl,
4693 : : complain))
4694 : 0 : return error_mark_node;
4695 : :
4696 : : return tmpl;
4697 : : }
4698 : :
4699 : 52206 : return make_unbound_class_template_raw (context, name, parm_list);
4700 : : }
4701 : :
4702 : : /* Build an UNBOUND_CLASS_TEMPLATE. */
4703 : :
4704 : : tree
4705 : 52250 : make_unbound_class_template_raw (tree context, tree name, tree parm_list)
4706 : : {
4707 : : /* Build the UNBOUND_CLASS_TEMPLATE. */
4708 : 52250 : tree t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
4709 : 52250 : TYPE_CONTEXT (t) = FROB_CONTEXT (context);
4710 : 52250 : TREE_TYPE (t) = NULL_TREE;
4711 : 52250 : SET_TYPE_STRUCTURAL_EQUALITY (t);
4712 : :
4713 : : /* Build the corresponding TEMPLATE_DECL. */
4714 : 52250 : tree d = build_decl (input_location, TEMPLATE_DECL, name, t);
4715 : 52250 : TYPE_NAME (t) = d;
4716 : 52250 : TYPE_STUB_DECL (t) = d;
4717 : 52250 : DECL_CONTEXT (d) = TYPE_CONTEXT (t);
4718 : 52250 : DECL_ARTIFICIAL (d) = 1;
4719 : 52250 : DECL_TEMPLATE_PARMS (d) = parm_list;
4720 : :
4721 : 52250 : return t;
4722 : : }
4723 : :
4724 : :
4725 : :
4726 : : /* Push the declarations of builtin types into the global namespace.
4727 : : RID_INDEX is the index of the builtin type in the array
4728 : : RID_POINTERS. NAME is the name used when looking up the builtin
4729 : : type. TYPE is the _TYPE node for the builtin type.
4730 : :
4731 : : The calls to set_global_binding below should be
4732 : : eliminated. Built-in types should not be looked up name; their
4733 : : names are keywords that the parser can recognize. However, there
4734 : : is code in c-common.cc that uses identifier_global_value to look up
4735 : : built-in types by name. */
4736 : :
4737 : : void
4738 : 3857623 : record_builtin_type (enum rid rid_index,
4739 : : const char* name,
4740 : : tree type)
4741 : : {
4742 : 3857623 : tree decl = NULL_TREE;
4743 : :
4744 : 3857623 : if (name)
4745 : : {
4746 : 2258841 : tree tname = get_identifier (name);
4747 : 2258841 : tree tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
4748 : 2258841 : DECL_ARTIFICIAL (tdecl) = 1;
4749 : 2258841 : set_global_binding (tdecl);
4750 : 2258841 : decl = tdecl;
4751 : : }
4752 : :
4753 : 3857623 : if ((int) rid_index < (int) RID_MAX)
4754 : 2352887 : if (tree rname = ridpointers[(int) rid_index])
4755 : 1788611 : if (!decl || DECL_NAME (decl) != rname)
4756 : : {
4757 : 1316644 : tree rdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
4758 : 1316644 : DECL_ARTIFICIAL (rdecl) = 1;
4759 : 1316644 : set_global_binding (rdecl);
4760 : 1316644 : if (!decl)
4761 : : decl = rdecl;
4762 : : }
4763 : :
4764 : 3575485 : if (decl)
4765 : : {
4766 : 3293347 : if (!TYPE_NAME (type))
4767 : 2729071 : TYPE_NAME (type) = decl;
4768 : 3293347 : debug_hooks->type_decl (decl, 0);
4769 : : }
4770 : 3857623 : }
4771 : :
4772 : : /* Push a type into the namespace so that the back ends ignore it. */
4773 : :
4774 : : static void
4775 : 282138 : record_unknown_type (tree type, const char* name)
4776 : : {
4777 : 282138 : tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
4778 : : TYPE_DECL, get_identifier (name), type));
4779 : : /* Make sure the "unknown type" typedecl gets ignored for debug info. */
4780 : 282138 : DECL_IGNORED_P (decl) = 1;
4781 : 282138 : TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4782 : 282138 : TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
4783 : 282138 : SET_TYPE_ALIGN (type, 1);
4784 : 282138 : TYPE_USER_ALIGN (type) = 0;
4785 : 282138 : SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
4786 : 282138 : }
4787 : :
4788 : : /* Create all the predefined identifiers. */
4789 : :
4790 : : static void
4791 : 94046 : initialize_predefined_identifiers (void)
4792 : : {
4793 : 94046 : struct predefined_identifier
4794 : : {
4795 : : const char *name; /* Name. */
4796 : : tree *node; /* Node to store it in. */
4797 : : cp_identifier_kind kind; /* Kind of identifier. */
4798 : : };
4799 : :
4800 : : /* A table of identifiers to create at startup. */
4801 : 94046 : static const predefined_identifier predefined_identifiers[] = {
4802 : : {"C++", &lang_name_cplusplus, cik_normal},
4803 : : {"C", &lang_name_c, cik_normal},
4804 : : /* Some of these names have a trailing space so that it is
4805 : : impossible for them to conflict with names written by users. */
4806 : : {"__ct ", &ctor_identifier, cik_ctor},
4807 : : {"__ct_base ", &base_ctor_identifier, cik_ctor},
4808 : : {"__ct_comp ", &complete_ctor_identifier, cik_ctor},
4809 : : {"__dt ", &dtor_identifier, cik_dtor},
4810 : : {"__dt_base ", &base_dtor_identifier, cik_dtor},
4811 : : {"__dt_comp ", &complete_dtor_identifier, cik_dtor},
4812 : : {"__dt_del ", &deleting_dtor_identifier, cik_dtor},
4813 : : {"__conv_op ", &conv_op_identifier, cik_conv_op},
4814 : : {"__in_chrg", &in_charge_identifier, cik_normal},
4815 : : {"__as_base ", &as_base_identifier, cik_normal},
4816 : : {"this", &this_identifier, cik_normal},
4817 : : {"__delta", &delta_identifier, cik_normal},
4818 : : {"__pfn", &pfn_identifier, cik_normal},
4819 : : {"_vptr", &vptr_identifier, cik_normal},
4820 : : {"__vtt_parm", &vtt_parm_identifier, cik_normal},
4821 : : {"::", &global_identifier, cik_normal},
4822 : : /* The demangler expects anonymous namespaces to be called
4823 : : something starting with '_GLOBAL__N_'. It no longer needs
4824 : : to be unique to the TU. */
4825 : : {"_GLOBAL__N_1", &anon_identifier, cik_normal},
4826 : : {"auto", &auto_identifier, cik_normal},
4827 : : {"decltype(auto)", &decltype_auto_identifier, cik_normal},
4828 : : {"initializer_list", &init_list_identifier, cik_normal},
4829 : : {"__for_range ", &for_range__identifier, cik_normal},
4830 : : {"__for_begin ", &for_begin__identifier, cik_normal},
4831 : : {"__for_end ", &for_end__identifier, cik_normal},
4832 : : {"__for_range", &for_range_identifier, cik_normal},
4833 : : {"__for_begin", &for_begin_identifier, cik_normal},
4834 : : {"__for_end", &for_end_identifier, cik_normal},
4835 : : {"abi_tag", &abi_tag_identifier, cik_normal},
4836 : : {"aligned", &aligned_identifier, cik_normal},
4837 : : {"begin", &begin_identifier, cik_normal},
4838 : : {"end", &end_identifier, cik_normal},
4839 : : {"get", &get__identifier, cik_normal},
4840 : : {"gnu", &gnu_identifier, cik_normal},
4841 : : {"tuple_element", &tuple_element_identifier, cik_normal},
4842 : : {"tuple_size", &tuple_size_identifier, cik_normal},
4843 : : {"type", &type_identifier, cik_normal},
4844 : : {"value", &value_identifier, cik_normal},
4845 : : {"_FUN", &fun_identifier, cik_normal},
4846 : : {"__closure", &closure_identifier, cik_normal},
4847 : : {"heap uninit", &heap_uninit_identifier, cik_normal},
4848 : : {"heap ", &heap_identifier, cik_normal},
4849 : : {"heap deleted", &heap_deleted_identifier, cik_normal},
4850 : : {"heap [] uninit", &heap_vec_uninit_identifier, cik_normal},
4851 : : {"heap []", &heap_vec_identifier, cik_normal},
4852 : : {"omp", &omp_identifier, cik_normal},
4853 : : {"internal ", &internal_identifier, cik_normal},
4854 : : {NULL, NULL, cik_normal}
4855 : : };
4856 : :
4857 : 4514208 : for (const predefined_identifier *pid = predefined_identifiers;
4858 : 4514208 : pid->name; ++pid)
4859 : : {
4860 : 4420162 : *pid->node = get_identifier (pid->name);
4861 : : /* Some of these identifiers already have a special kind. */
4862 : 4420162 : if (pid->kind != cik_normal)
4863 : 752368 : set_identifier_kind (*pid->node, pid->kind);
4864 : : }
4865 : 94046 : }
4866 : :
4867 : : /* Build a specific variant of operator new. */
4868 : :
4869 : : static void
4870 : 167511 : cxx_build_operator_new (tree newtype)
4871 : : {
4872 : 167511 : tree opnew = push_cp_library_fn (NEW_EXPR, newtype, 0);
4873 : 167511 : DECL_IS_MALLOC (opnew) = 1;
4874 : 167511 : DECL_SET_IS_OPERATOR_NEW (opnew, true);
4875 : 167511 : DECL_IS_REPLACEABLE_OPERATOR (opnew) = 1;
4876 : 167511 : opnew = push_cp_library_fn (VEC_NEW_EXPR, newtype, 0);
4877 : 167511 : DECL_IS_MALLOC (opnew) = 1;
4878 : 167511 : DECL_SET_IS_OPERATOR_NEW (opnew, true);
4879 : 167511 : DECL_IS_REPLACEABLE_OPERATOR (opnew) = 1;
4880 : 167511 : }
4881 : :
4882 : : /* Build a specific variant of operator delete. */
4883 : :
4884 : : static void
4885 : 315654 : cxx_build_operator_delete (tree deltype)
4886 : : {
4887 : 315654 : tree opdel = push_cp_library_fn (DELETE_EXPR, deltype, ECF_NOTHROW);
4888 : 315654 : DECL_SET_IS_OPERATOR_DELETE (opdel, true);
4889 : 315654 : DECL_IS_REPLACEABLE_OPERATOR (opdel) = 1;
4890 : 315654 : opdel = push_cp_library_fn (VEC_DELETE_EXPR, deltype, ECF_NOTHROW);
4891 : 315654 : DECL_SET_IS_OPERATOR_DELETE (opdel, true);
4892 : 315654 : DECL_IS_REPLACEABLE_OPERATOR (opdel) = 1;
4893 : 315654 : }
4894 : :
4895 : : /* Declare all variants of operator new and delete. */
4896 : :
4897 : : static void
4898 : 94046 : cxx_init_operator_new_delete_decls (void)
4899 : : {
4900 : 94046 : tree newattrs, extvisattr;
4901 : 94046 : tree newtype, deltype;
4902 : 94046 : tree ptr_ftype_sizetype;
4903 : 94046 : tree new_eh_spec;
4904 : 94046 : tree void_ftype_ptr = build_function_type_list (void_type_node,
4905 : : ptr_type_node, NULL_TREE);
4906 : 94046 : void_ftype_ptr
4907 : 94046 : = build_exception_variant (void_ftype_ptr, empty_except_spec);
4908 : :
4909 : 94046 : ptr_ftype_sizetype
4910 : 94046 : = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
4911 : 94046 : if (cxx_dialect == cxx98)
4912 : : {
4913 : 13870 : tree bad_alloc_id;
4914 : 13870 : tree bad_alloc_type_node;
4915 : 13870 : tree bad_alloc_decl;
4916 : :
4917 : 13870 : push_nested_namespace (std_node);
4918 : 13870 : bad_alloc_id = get_identifier ("bad_alloc");
4919 : 13870 : bad_alloc_type_node = make_class_type (RECORD_TYPE);
4920 : 13870 : TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
4921 : 13870 : bad_alloc_decl
4922 : 13870 : = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
4923 : 13870 : DECL_CONTEXT (bad_alloc_decl) = current_namespace;
4924 : 13870 : pop_nested_namespace (std_node);
4925 : :
4926 : 13870 : new_eh_spec
4927 : 13870 : = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
4928 : : }
4929 : : else
4930 : 80176 : new_eh_spec = noexcept_false_spec;
4931 : :
4932 : 94046 : extvisattr = build_tree_list (get_identifier ("externally_visible"),
4933 : : NULL_TREE);
4934 : 94046 : newattrs = tree_cons (get_identifier ("alloc_size"),
4935 : : build_tree_list (NULL_TREE, integer_one_node),
4936 : : extvisattr);
4937 : 94046 : newtype = cp_build_type_attribute_variant (ptr_ftype_sizetype, newattrs);
4938 : 94046 : newtype = build_exception_variant (newtype, new_eh_spec);
4939 : 94046 : deltype = cp_build_type_attribute_variant (void_ftype_ptr, extvisattr);
4940 : 94046 : deltype = build_exception_variant (deltype, empty_except_spec);
4941 : 94046 : cxx_build_operator_new (newtype);
4942 : 94046 : cxx_build_operator_delete (deltype);
4943 : 94046 : if (flag_sized_deallocation)
4944 : : {
4945 : : /* Also push the sized deallocation variants:
4946 : : void operator delete(void*, std::size_t) throw();
4947 : : void operator delete[](void*, std::size_t) throw(); */
4948 : 74683 : tree void_ftype_ptr_size
4949 : 74683 : = build_function_type_list (void_type_node, ptr_type_node,
4950 : : size_type_node, NULL_TREE);
4951 : 74683 : deltype = cp_build_type_attribute_variant (void_ftype_ptr_size,
4952 : : extvisattr);
4953 : 74683 : deltype = build_exception_variant (deltype, empty_except_spec);
4954 : 74683 : cxx_build_operator_delete (deltype);
4955 : : }
4956 : :
4957 : 94046 : if (aligned_new_threshold)
4958 : : {
4959 : 73465 : push_nested_namespace (std_node);
4960 : 73465 : tree align_id = get_identifier ("align_val_t");
4961 : 73465 : align_type_node = start_enum (align_id, NULL_TREE, size_type_node,
4962 : : NULL_TREE, /*scoped*/true, NULL);
4963 : 73465 : pop_nested_namespace (std_node);
4964 : :
4965 : : /* operator new (size_t, align_val_t); */
4966 : 73465 : newtype = build_function_type_list (ptr_type_node, size_type_node,
4967 : : align_type_node, NULL_TREE);
4968 : 73465 : newtype = cp_build_type_attribute_variant (newtype, newattrs);
4969 : 73465 : newtype = build_exception_variant (newtype, new_eh_spec);
4970 : 73465 : cxx_build_operator_new (newtype);
4971 : :
4972 : : /* operator delete (void *, align_val_t); */
4973 : 73465 : deltype = build_function_type_list (void_type_node, ptr_type_node,
4974 : : align_type_node, NULL_TREE);
4975 : 73465 : deltype = cp_build_type_attribute_variant (deltype, extvisattr);
4976 : 73465 : deltype = build_exception_variant (deltype, empty_except_spec);
4977 : 73465 : cxx_build_operator_delete (deltype);
4978 : :
4979 : 73465 : if (flag_sized_deallocation)
4980 : : {
4981 : : /* operator delete (void *, size_t, align_val_t); */
4982 : 73460 : deltype = build_function_type_list (void_type_node, ptr_type_node,
4983 : : size_type_node, align_type_node,
4984 : : NULL_TREE);
4985 : 73460 : deltype = cp_build_type_attribute_variant (deltype, extvisattr);
4986 : 73460 : deltype = build_exception_variant (deltype, empty_except_spec);
4987 : 73460 : cxx_build_operator_delete (deltype);
4988 : : }
4989 : : }
4990 : 94046 : }
4991 : :
4992 : : /* Create the predefined scalar types of C,
4993 : : and some nodes representing standard constants (0, 1, (void *)0).
4994 : : Initialize the global binding level.
4995 : : Make definitions for built-in primitive functions. */
4996 : :
4997 : : void
4998 : 94046 : cxx_init_decl_processing (void)
4999 : : {
5000 : 94046 : tree void_ftype;
5001 : :
5002 : : /* Create all the identifiers we need. */
5003 : 94046 : initialize_predefined_identifiers ();
5004 : :
5005 : : /* Create the global variables. */
5006 : 94046 : push_to_top_level ();
5007 : :
5008 : 94046 : current_function_decl = NULL_TREE;
5009 : 94046 : current_binding_level = NULL;
5010 : : /* Enter the global namespace. */
5011 : 94046 : gcc_assert (global_namespace == NULL_TREE);
5012 : 94046 : global_namespace = build_lang_decl (NAMESPACE_DECL, global_identifier,
5013 : : void_type_node);
5014 : 94046 : TREE_PUBLIC (global_namespace) = true;
5015 : 94046 : DECL_MODULE_EXPORT_P (global_namespace) = true;
5016 : 94046 : DECL_CONTEXT (global_namespace)
5017 : 94046 : = build_translation_unit_decl (get_identifier (main_input_filename));
5018 : : /* Remember whether we want the empty class passing ABI change warning
5019 : : in this TU. */
5020 : 94046 : TRANSLATION_UNIT_WARN_EMPTY_P (DECL_CONTEXT (global_namespace))
5021 : 95133 : = warn_abi && abi_version_crosses (12);
5022 : 94046 : debug_hooks->register_main_translation_unit
5023 : 94046 : (DECL_CONTEXT (global_namespace));
5024 : 94046 : begin_scope (sk_namespace, global_namespace);
5025 : 94046 : current_namespace = global_namespace;
5026 : :
5027 : 94046 : if (flag_visibility_ms_compat)
5028 : 6 : default_visibility = VISIBILITY_HIDDEN;
5029 : :
5030 : : /* Initially, C. */
5031 : 94046 : current_lang_name = lang_name_c;
5032 : :
5033 : : /* Create the `std' namespace. */
5034 : 94046 : push_namespace (get_identifier ("std"));
5035 : 94046 : std_node = current_namespace;
5036 : 94046 : pop_namespace ();
5037 : :
5038 : 94046 : flag_noexcept_type = (cxx_dialect >= cxx17);
5039 : :
5040 : 94046 : c_common_nodes_and_builtins ();
5041 : :
5042 : 94046 : tree bool_ftype = build_function_type_list (boolean_type_node, NULL_TREE);
5043 : 94046 : tree decl
5044 : 94046 : = add_builtin_function ("__builtin_is_constant_evaluated",
5045 : : bool_ftype, CP_BUILT_IN_IS_CONSTANT_EVALUATED,
5046 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5047 : 94046 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5048 : :
5049 : : /* The concrete return type of __builtin_source_location is
5050 : : const std::source_location::__impl*, but we can't form the type
5051 : : at this point. So we initially declare it with an auto return
5052 : : type which we then "deduce" from require_deduced_type upon first use. */
5053 : 94046 : tree auto_ftype = build_function_type_list (make_auto (), NULL_TREE);
5054 : 94046 : decl = add_builtin_function ("__builtin_source_location",
5055 : : auto_ftype, CP_BUILT_IN_SOURCE_LOCATION,
5056 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5057 : 94046 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5058 : :
5059 : 94046 : tree bool_vaftype = build_varargs_function_type_list (boolean_type_node,
5060 : : NULL_TREE);
5061 : 94046 : decl
5062 : 94046 : = add_builtin_function ("__builtin_is_corresponding_member",
5063 : : bool_vaftype,
5064 : : CP_BUILT_IN_IS_CORRESPONDING_MEMBER,
5065 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5066 : 94046 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5067 : :
5068 : 94046 : decl
5069 : 94046 : = add_builtin_function ("__builtin_is_pointer_interconvertible_with_class",
5070 : : bool_vaftype,
5071 : : CP_BUILT_IN_IS_POINTER_INTERCONVERTIBLE_WITH_CLASS,
5072 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5073 : 94046 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5074 : :
5075 : 94046 : integer_two_node = build_int_cst (NULL_TREE, 2);
5076 : :
5077 : : /* Guess at the initial static decls size. */
5078 : 94046 : vec_alloc (static_decls, 500);
5079 : :
5080 : : /* ... and keyed classes. */
5081 : 94046 : vec_alloc (keyed_classes, 100);
5082 : :
5083 : 94046 : record_builtin_type (RID_BOOL, "bool", boolean_type_node);
5084 : 94046 : truthvalue_type_node = boolean_type_node;
5085 : 94046 : truthvalue_false_node = boolean_false_node;
5086 : 94046 : truthvalue_true_node = boolean_true_node;
5087 : :
5088 : 94046 : empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
5089 : 94046 : noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
5090 : 94046 : noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
5091 : 94046 : noexcept_deferred_spec = build_tree_list (make_node (DEFERRED_NOEXCEPT),
5092 : : NULL_TREE);
5093 : :
5094 : : #if 0
5095 : : record_builtin_type (RID_MAX, NULL, string_type_node);
5096 : : #endif
5097 : :
5098 : 94046 : delta_type_node = ptrdiff_type_node;
5099 : 94046 : vtable_index_type = ptrdiff_type_node;
5100 : :
5101 : 94046 : vtt_parm_type = build_pointer_type (const_ptr_type_node);
5102 : 94046 : void_ftype = build_function_type_list (void_type_node, NULL_TREE);
5103 : :
5104 : : /* Create the conversion operator marker. This operator's DECL_NAME
5105 : : is in the identifier table, so we can use identifier equality to
5106 : : find it. */
5107 : 94046 : conv_op_marker = build_lang_decl (FUNCTION_DECL, conv_op_identifier,
5108 : : void_ftype);
5109 : :
5110 : : /* C++ extensions */
5111 : :
5112 : 94046 : unknown_type_node = make_node (LANG_TYPE);
5113 : 94046 : record_unknown_type (unknown_type_node, "unknown type");
5114 : :
5115 : : /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
5116 : 94046 : TREE_TYPE (unknown_type_node) = unknown_type_node;
5117 : :
5118 : : /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
5119 : : result. */
5120 : 94046 : TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
5121 : 94046 : TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
5122 : :
5123 : 94046 : init_list_type_node = make_node (LANG_TYPE);
5124 : 94046 : record_unknown_type (init_list_type_node, "init list");
5125 : :
5126 : : /* Used when parsing to distinguish parameter-lists () and (void). */
5127 : 94046 : explicit_void_list_node = build_tree_list (NULL_TREE, void_type_node);
5128 : :
5129 : 94046 : {
5130 : : /* Make sure we get a unique function type, so we can give
5131 : : its pointer type a name. (This wins for gdb.) */
5132 : 94046 : tree vfunc_type = make_node (FUNCTION_TYPE);
5133 : 94046 : TREE_TYPE (vfunc_type) = integer_type_node;
5134 : 94046 : TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
5135 : 94046 : layout_type (vfunc_type);
5136 : :
5137 : 94046 : vtable_entry_type = build_pointer_type (vfunc_type);
5138 : : }
5139 : 94046 : record_builtin_type (RID_MAX, "__vtbl_ptr_type", vtable_entry_type);
5140 : :
5141 : 94046 : vtbl_type_node
5142 : 94046 : = build_cplus_array_type (vtable_entry_type, NULL_TREE);
5143 : 94046 : layout_type (vtbl_type_node);
5144 : 94046 : vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
5145 : 94046 : record_builtin_type (RID_MAX, NULL, vtbl_type_node);
5146 : 94046 : vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
5147 : 94046 : layout_type (vtbl_ptr_type_node);
5148 : 94046 : record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
5149 : :
5150 : 94046 : push_namespace (get_identifier ("__cxxabiv1"));
5151 : 94046 : abi_node = current_namespace;
5152 : 94046 : pop_namespace ();
5153 : :
5154 : 94046 : any_targ_node = make_node (LANG_TYPE);
5155 : 94046 : record_unknown_type (any_targ_node, "any type");
5156 : :
5157 : : /* Now, C++. */
5158 : 94046 : current_lang_name = lang_name_cplusplus;
5159 : :
5160 : 94046 : if (aligned_new_threshold > 1
5161 : 94046 : && !pow2p_hwi (aligned_new_threshold))
5162 : : {
5163 : 0 : error ("%<-faligned-new=%d%> is not a power of two",
5164 : : aligned_new_threshold);
5165 : 0 : aligned_new_threshold = 1;
5166 : : }
5167 : 94046 : if (aligned_new_threshold == -1)
5168 : 114613 : aligned_new_threshold = (cxx_dialect >= cxx17) ? 1 : 0;
5169 : 94046 : if (aligned_new_threshold == 1)
5170 : 73462 : aligned_new_threshold = malloc_alignment () / BITS_PER_UNIT;
5171 : :
5172 : : /* Ensure attribs.cc is initialized. */
5173 : 94046 : init_attributes ();
5174 : 94046 : cxx_init_operator_new_delete_decls ();
5175 : :
5176 : : /* C++-specific nullptr initialization. */
5177 : 94046 : if (abi_version_at_least (9))
5178 : 93875 : SET_TYPE_ALIGN (nullptr_type_node, GET_MODE_ALIGNMENT (ptr_mode));
5179 : 94046 : record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
5180 : :
5181 : 94046 : if (! supports_one_only ())
5182 : 0 : flag_weak = 0;
5183 : :
5184 : 94046 : abort_fndecl
5185 : 94046 : = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype,
5186 : : ECF_NORETURN | ECF_NOTHROW | ECF_COLD);
5187 : 94046 : if (flag_weak)
5188 : : /* If no definition is available, resolve references to NULL. */
5189 : 94016 : declare_weak (abort_fndecl);
5190 : :
5191 : : /* Perform other language dependent initializations. */
5192 : 94046 : init_class_processing ();
5193 : 94046 : init_rtti_processing ();
5194 : 94046 : init_template_processing ();
5195 : :
5196 : 94046 : if (flag_exceptions)
5197 : 92833 : init_exception_processing ();
5198 : :
5199 : 94046 : if (flag_contracts)
5200 : 149 : init_terminate_fn ();
5201 : :
5202 : 94046 : if (modules_p ())
5203 : 4171 : init_modules (parse_in);
5204 : :
5205 : 94046 : make_fname_decl = cp_make_fname_decl;
5206 : 94046 : start_fname_decls ();
5207 : :
5208 : : /* Show we use EH for cleanups. */
5209 : 94046 : if (flag_exceptions)
5210 : 92833 : using_eh_for_cleanups ();
5211 : :
5212 : : /* Check that the hardware interference sizes are at least
5213 : : alignof(max_align_t), as required by the standard. */
5214 : 94046 : const int max_align = max_align_t_align () / BITS_PER_UNIT;
5215 : 94046 : if (OPTION_SET_P (param_destruct_interfere_size))
5216 : : {
5217 : 0 : if (param_destruct_interfere_size < max_align)
5218 : 0 : error ("%<--param destructive-interference-size=%d%> is less than "
5219 : : "%d", param_destruct_interfere_size, max_align);
5220 : 0 : else if (param_destruct_interfere_size < param_l1_cache_line_size)
5221 : 0 : warning (OPT_Winterference_size,
5222 : : "%<--param destructive-interference-size=%d%> "
5223 : : "is less than %<--param l1-cache-line-size=%d%>",
5224 : : param_destruct_interfere_size, param_l1_cache_line_size);
5225 : : }
5226 : 94046 : else if (param_destruct_interfere_size)
5227 : : /* Assume the internal value is OK. */;
5228 : 0 : else if (param_l1_cache_line_size >= max_align)
5229 : 0 : param_destruct_interfere_size = param_l1_cache_line_size;
5230 : : /* else leave it unset. */
5231 : :
5232 : 94046 : if (OPTION_SET_P (param_construct_interfere_size))
5233 : : {
5234 : 0 : if (param_construct_interfere_size < max_align)
5235 : 0 : error ("%<--param constructive-interference-size=%d%> is less than "
5236 : : "%d", param_construct_interfere_size, max_align);
5237 : 0 : else if (param_construct_interfere_size > param_l1_cache_line_size
5238 : 0 : && param_l1_cache_line_size >= max_align)
5239 : 0 : warning (OPT_Winterference_size,
5240 : : "%<--param constructive-interference-size=%d%> "
5241 : : "is greater than %<--param l1-cache-line-size=%d%>",
5242 : : param_construct_interfere_size, param_l1_cache_line_size);
5243 : : }
5244 : 94046 : else if (param_construct_interfere_size)
5245 : : /* Assume the internal value is OK. */;
5246 : 0 : else if (param_l1_cache_line_size >= max_align)
5247 : 0 : param_construct_interfere_size = param_l1_cache_line_size;
5248 : 94046 : }
5249 : :
5250 : : /* Enter an abi node in global-module context. returns a cookie to
5251 : : give to pop_abi_namespace. */
5252 : :
5253 : : unsigned
5254 : 58326 : push_abi_namespace (tree node)
5255 : : {
5256 : 58326 : push_nested_namespace (node);
5257 : 58326 : push_visibility ("default", 2);
5258 : 58326 : unsigned flags = module_kind;
5259 : 58326 : module_kind = 0;
5260 : 58326 : return flags;
5261 : : }
5262 : :
5263 : : /* Pop an abi namespace, FLAGS is the cookie push_abi_namespace gave
5264 : : you. */
5265 : :
5266 : : void
5267 : 58326 : pop_abi_namespace (unsigned flags, tree node)
5268 : : {
5269 : 58326 : module_kind = flags;
5270 : 58326 : pop_visibility (2);
5271 : 58326 : pop_nested_namespace (node);
5272 : 58326 : }
5273 : :
5274 : : /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
5275 : : the decl, LOC is the location to give the decl, NAME is the
5276 : : initialization string and TYPE_DEP indicates whether NAME depended
5277 : : on the type of the function. We make use of that to detect
5278 : : __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
5279 : : at the point of first use, so we mustn't push the decl now. */
5280 : :
5281 : : static tree
5282 : 106425 : cp_make_fname_decl (location_t loc, tree id, int type_dep)
5283 : : {
5284 : 106425 : tree domain = NULL_TREE;
5285 : 106425 : tree init = NULL_TREE;
5286 : :
5287 : 106425 : if (!(type_dep && current_function_decl && in_template_context))
5288 : : {
5289 : 31770 : const char *name = NULL;
5290 : 31770 : bool release_name = false;
5291 : :
5292 : 31770 : if (current_function_decl == NULL_TREE)
5293 : : name = "top level";
5294 : 31756 : else if (type_dep == 0)
5295 : : {
5296 : : /* __FUNCTION__ */
5297 : 598 : name = fname_as_string (type_dep);
5298 : 598 : release_name = true;
5299 : : }
5300 : : else
5301 : : {
5302 : : /* __PRETTY_FUNCTION__ */
5303 : 31158 : gcc_checking_assert (type_dep == 1);
5304 : 31158 : name = cxx_printable_name (current_function_decl, 2);
5305 : : }
5306 : :
5307 : 31770 : size_t length = strlen (name);
5308 : 31770 : domain = build_index_type (size_int (length));
5309 : 31770 : init = build_string (length + 1, name);
5310 : 31770 : if (release_name)
5311 : 598 : free (const_cast<char *> (name));
5312 : : }
5313 : :
5314 : 106425 : tree type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
5315 : 106425 : type = build_cplus_array_type (type, domain);
5316 : :
5317 : 106425 : if (init)
5318 : 31770 : TREE_TYPE (init) = type;
5319 : : else
5320 : 74655 : init = error_mark_node;
5321 : :
5322 : 106425 : tree decl = build_decl (loc, VAR_DECL, id, type);
5323 : :
5324 : 106425 : TREE_READONLY (decl) = 1;
5325 : 106425 : DECL_ARTIFICIAL (decl) = 1;
5326 : 106425 : DECL_DECLARED_CONSTEXPR_P (decl) = 1;
5327 : 106425 : TREE_STATIC (decl) = 1;
5328 : :
5329 : 106425 : TREE_USED (decl) = 1;
5330 : :
5331 : 106425 : SET_DECL_VALUE_EXPR (decl, init);
5332 : 106425 : DECL_HAS_VALUE_EXPR_P (decl) = 1;
5333 : : /* For decl_constant_var_p. */
5334 : 106425 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5335 : :
5336 : 106425 : if (current_function_decl)
5337 : : {
5338 : 106411 : DECL_CONTEXT (decl) = current_function_decl;
5339 : 106411 : decl = pushdecl_outermost_localscope (decl);
5340 : 106411 : if (decl != error_mark_node)
5341 : 106408 : add_decl_expr (decl);
5342 : : else
5343 : 3 : gcc_assert (seen_error ());
5344 : : }
5345 : : else
5346 : : {
5347 : 14 : DECL_THIS_STATIC (decl) = true;
5348 : 14 : decl = pushdecl_top_level_and_finish (decl, NULL_TREE);
5349 : : }
5350 : :
5351 : 106425 : return decl;
5352 : : }
5353 : :
5354 : : /* Install DECL as a builtin function at current global scope. Return
5355 : : the new decl (if we found an existing version). Also installs it
5356 : : into ::std, if it's not '_*'. */
5357 : :
5358 : : tree
5359 : 210267192 : cxx_builtin_function (tree decl)
5360 : : {
5361 : 210267192 : retrofit_lang_decl (decl);
5362 : :
5363 : 210267192 : DECL_ARTIFICIAL (decl) = 1;
5364 : 210267192 : SET_DECL_LANGUAGE (decl, lang_c);
5365 : : /* Runtime library routines are, by definition, available in an
5366 : : external shared object. */
5367 : 210267192 : DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
5368 : 210267192 : DECL_VISIBILITY_SPECIFIED (decl) = 1;
5369 : :
5370 : 210267192 : tree id = DECL_NAME (decl);
5371 : 210267192 : const char *name = IDENTIFIER_POINTER (id);
5372 : 210267192 : bool hiding = false;
5373 : 210267192 : if (name[0] != '_' || name[1] != '_')
5374 : : /* In the user's namespace, it must be declared before use. */
5375 : : hiding = true;
5376 : 176181319 : else if (IDENTIFIER_LENGTH (id) > strlen ("___chk")
5377 : 176181319 : && !startswith (name + 2, "builtin_")
5378 : 198064267 : && 0 == memcmp (name + IDENTIFIER_LENGTH (id) - strlen ("_chk"),
5379 : : "_chk", strlen ("_chk") + 1))
5380 : : /* Treat __*_chk fortification functions as anticipated as well,
5381 : : unless they are __builtin_*_chk. */
5382 : : hiding = true;
5383 : :
5384 : : /* All builtins that don't begin with an '_' should additionally
5385 : : go in the 'std' namespace. */
5386 : 210267192 : if (name[0] != '_')
5387 : : {
5388 : 33957412 : tree std_decl = copy_decl (decl);
5389 : :
5390 : 33957412 : push_nested_namespace (std_node);
5391 : 33957412 : DECL_CONTEXT (std_decl) = FROB_CONTEXT (std_node);
5392 : 33957412 : pushdecl (std_decl, hiding);
5393 : 33957412 : pop_nested_namespace (std_node);
5394 : : }
5395 : :
5396 : 210267192 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5397 : 210267192 : decl = pushdecl (decl, hiding);
5398 : :
5399 : 210267192 : return decl;
5400 : : }
5401 : :
5402 : : /* Like cxx_builtin_function, but guarantee the function is added to the global
5403 : : scope. This is to allow function specific options to add new machine
5404 : : dependent builtins when the target ISA changes via attribute((target(...)))
5405 : : which saves space on program startup if the program does not use non-generic
5406 : : ISAs. */
5407 : :
5408 : : tree
5409 : 649381 : cxx_builtin_function_ext_scope (tree decl)
5410 : : {
5411 : 649381 : push_nested_namespace (global_namespace);
5412 : 649381 : decl = cxx_builtin_function (decl);
5413 : 649381 : pop_nested_namespace (global_namespace);
5414 : :
5415 : 649381 : return decl;
5416 : : }
5417 : :
5418 : : /* Implement LANG_HOOKS_SIMULATE_BUILTIN_FUNCTION_DECL. */
5419 : :
5420 : : tree
5421 : 0 : cxx_simulate_builtin_function_decl (tree decl)
5422 : : {
5423 : 0 : retrofit_lang_decl (decl);
5424 : :
5425 : 0 : DECL_ARTIFICIAL (decl) = 1;
5426 : 0 : SET_DECL_LANGUAGE (decl, lang_cplusplus);
5427 : 0 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5428 : 0 : return pushdecl (decl);
5429 : : }
5430 : :
5431 : : /* Generate a FUNCTION_DECL with the typical flags for a runtime library
5432 : : function. Not called directly. */
5433 : :
5434 : : static tree
5435 : 1512704 : build_library_fn (tree name, enum tree_code operator_code, tree type,
5436 : : int ecf_flags)
5437 : : {
5438 : 1512704 : tree fn = build_lang_decl (FUNCTION_DECL, name, type);
5439 : 1512704 : DECL_EXTERNAL (fn) = 1;
5440 : 1512704 : TREE_PUBLIC (fn) = 1;
5441 : 1512704 : DECL_ARTIFICIAL (fn) = 1;
5442 : 1512704 : DECL_OVERLOADED_OPERATOR_CODE_RAW (fn)
5443 : 1512704 : = OVL_OP_INFO (false, operator_code)->ovl_op_code;
5444 : 1512704 : SET_DECL_LANGUAGE (fn, lang_c);
5445 : : /* Runtime library routines are, by definition, available in an
5446 : : external shared object. */
5447 : 1512704 : DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
5448 : 1512704 : DECL_VISIBILITY_SPECIFIED (fn) = 1;
5449 : 1512704 : set_call_expr_flags (fn, ecf_flags);
5450 : 1512704 : return fn;
5451 : : }
5452 : :
5453 : : /* Returns the _DECL for a library function with C++ linkage. */
5454 : :
5455 : : static tree
5456 : 1059250 : build_cp_library_fn (tree name, enum tree_code operator_code, tree type,
5457 : : int ecf_flags)
5458 : : {
5459 : 1059250 : tree fn = build_library_fn (name, operator_code, type, ecf_flags);
5460 : 1059250 : DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
5461 : 1059250 : SET_DECL_LANGUAGE (fn, lang_cplusplus);
5462 : 1059250 : return fn;
5463 : : }
5464 : :
5465 : : /* Like build_library_fn, but takes a C string instead of an
5466 : : IDENTIFIER_NODE. */
5467 : :
5468 : : tree
5469 : 99965 : build_library_fn_ptr (const char* name, tree type, int ecf_flags)
5470 : : {
5471 : 99965 : return build_library_fn (get_identifier (name), ERROR_MARK, type, ecf_flags);
5472 : : }
5473 : :
5474 : : /* Like build_cp_library_fn, but takes a C string instead of an
5475 : : IDENTIFIER_NODE. */
5476 : :
5477 : : tree
5478 : 92920 : build_cp_library_fn_ptr (const char* name, tree type, int ecf_flags)
5479 : : {
5480 : 92920 : return build_cp_library_fn (get_identifier (name), ERROR_MARK, type,
5481 : 92920 : ecf_flags);
5482 : : }
5483 : :
5484 : : /* Like build_library_fn, but also pushes the function so that we will
5485 : : be able to find it via get_global_binding. Also, the function
5486 : : may throw exceptions listed in RAISES. */
5487 : :
5488 : : tree
5489 : 353489 : push_library_fn (tree name, tree type, tree raises, int ecf_flags)
5490 : : {
5491 : 353489 : if (raises)
5492 : 39373 : type = build_exception_variant (type, raises);
5493 : :
5494 : 353489 : tree fn = build_library_fn (name, ERROR_MARK, type, ecf_flags);
5495 : 353489 : return pushdecl_top_level (fn);
5496 : : }
5497 : :
5498 : : /* Like build_cp_library_fn, but also pushes the function so that it
5499 : : will be found by normal lookup. */
5500 : :
5501 : : static tree
5502 : 966330 : push_cp_library_fn (enum tree_code operator_code, tree type,
5503 : : int ecf_flags)
5504 : : {
5505 : 966330 : tree fn = build_cp_library_fn (ovl_op_identifier (false, operator_code),
5506 : : operator_code, type, ecf_flags);
5507 : 966330 : pushdecl (fn);
5508 : 966330 : if (flag_tm)
5509 : 3088 : apply_tm_attr (fn, get_identifier ("transaction_safe"));
5510 : 966330 : return fn;
5511 : : }
5512 : :
5513 : : /* Like push_library_fn, but also note that this function throws
5514 : : and does not return. Used for __throw_foo and the like. */
5515 : :
5516 : : tree
5517 : 103650 : push_throw_library_fn (tree name, tree type)
5518 : : {
5519 : 103650 : tree fn = push_library_fn (name, type, NULL_TREE,
5520 : : ECF_NORETURN | ECF_XTHROW | ECF_COLD);
5521 : 103650 : return fn;
5522 : : }
5523 : :
5524 : : /* When we call finish_struct for an anonymous union, we create
5525 : : default copy constructors and such. But, an anonymous union
5526 : : shouldn't have such things; this function undoes the damage to the
5527 : : anonymous union type T.
5528 : :
5529 : : (The reason that we create the synthesized methods is that we don't
5530 : : distinguish `union { int i; }' from `typedef union { int i; } U'.
5531 : : The first is an anonymous union; the second is just an ordinary
5532 : : union type.) */
5533 : :
5534 : : void
5535 : 90694 : fixup_anonymous_aggr (tree t)
5536 : : {
5537 : : /* Wipe out memory of synthesized methods. */
5538 : 90694 : TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
5539 : 90694 : TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
5540 : 90694 : TYPE_HAS_COPY_CTOR (t) = 0;
5541 : 90694 : TYPE_HAS_CONST_COPY_CTOR (t) = 0;
5542 : 90694 : TYPE_HAS_COPY_ASSIGN (t) = 0;
5543 : 90694 : TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
5544 : :
5545 : : /* Splice the implicitly generated functions out of TYPE_FIELDS and diagnose
5546 : : invalid members. */
5547 : 475473 : for (tree probe, *prev_p = &TYPE_FIELDS (t); (probe = *prev_p);)
5548 : : {
5549 : 384779 : if (TREE_CODE (probe) == FUNCTION_DECL && DECL_ARTIFICIAL (probe))
5550 : 0 : *prev_p = DECL_CHAIN (probe);
5551 : : else
5552 : 384779 : prev_p = &DECL_CHAIN (probe);
5553 : :
5554 : 384779 : if (DECL_ARTIFICIAL (probe)
5555 : 384779 : && (!DECL_IMPLICIT_TYPEDEF_P (probe)
5556 : 41812 : || TYPE_ANON_P (TREE_TYPE (probe))))
5557 : 136025 : continue;
5558 : :
5559 : 248754 : if (TREE_CODE (probe) != FIELD_DECL
5560 : 248754 : || (TREE_PRIVATE (probe) || TREE_PROTECTED (probe)))
5561 : : {
5562 : : /* We already complained about static data members in
5563 : : finish_static_data_member_decl. */
5564 : 66 : if (!VAR_P (probe))
5565 : : {
5566 : 51 : auto_diagnostic_group d;
5567 : 51 : if (permerror (DECL_SOURCE_LOCATION (probe),
5568 : 51 : TREE_CODE (t) == UNION_TYPE
5569 : : ? "%q#D invalid; an anonymous union may "
5570 : : "only have public non-static data members"
5571 : : : "%q#D invalid; an anonymous struct may "
5572 : : "only have public non-static data members", probe))
5573 : : {
5574 : 51 : static bool hint;
5575 : 51 : if (flag_permissive && !hint)
5576 : : {
5577 : 6 : hint = true;
5578 : 6 : inform (DECL_SOURCE_LOCATION (probe),
5579 : : "this flexibility is deprecated and will be "
5580 : : "removed");
5581 : : }
5582 : : }
5583 : 51 : }
5584 : : }
5585 : : }
5586 : :
5587 : : /* Splice all functions out of CLASSTYPE_MEMBER_VEC. */
5588 : 90694 : vec<tree,va_gc>* vec = CLASSTYPE_MEMBER_VEC (t);
5589 : 90694 : unsigned store = 0;
5590 : 203272 : for (tree elt : vec)
5591 : 112578 : if (!is_overloaded_fn (elt))
5592 : 112557 : (*vec)[store++] = elt;
5593 : 90694 : vec_safe_truncate (vec, store);
5594 : :
5595 : : /* Wipe RTTI info. */
5596 : 90694 : CLASSTYPE_TYPEINFO_VAR (t) = NULL_TREE;
5597 : :
5598 : : /* Anonymous aggregates cannot have fields with ctors, dtors or complex
5599 : : assignment operators (because they cannot have these methods themselves).
5600 : : For anonymous unions this is already checked because they are not allowed
5601 : : in any union, otherwise we have to check it. */
5602 : 90694 : if (TREE_CODE (t) != UNION_TYPE)
5603 : : {
5604 : 19642 : tree field, type;
5605 : :
5606 : 19642 : if (BINFO_N_BASE_BINFOS (TYPE_BINFO (t)))
5607 : : {
5608 : 9 : error_at (location_of (t), "anonymous struct with base classes");
5609 : : /* Avoid ICE after error on anon-struct9.C. */
5610 : 9 : TYPE_NEEDS_CONSTRUCTING (t) = false;
5611 : : }
5612 : :
5613 : 88829 : for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
5614 : 69187 : if (TREE_CODE (field) == FIELD_DECL)
5615 : : {
5616 : 49444 : type = TREE_TYPE (field);
5617 : 49444 : if (CLASS_TYPE_P (type))
5618 : : {
5619 : 61 : if (TYPE_NEEDS_CONSTRUCTING (type))
5620 : 6 : error ("member %q+#D with constructor not allowed "
5621 : : "in anonymous aggregate", field);
5622 : 61 : if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
5623 : 0 : error ("member %q+#D with destructor not allowed "
5624 : : "in anonymous aggregate", field);
5625 : 61 : if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
5626 : 0 : error ("member %q+#D with copy assignment operator "
5627 : : "not allowed in anonymous aggregate", field);
5628 : : }
5629 : : }
5630 : : }
5631 : 90694 : }
5632 : :
5633 : : /* Warn for an attribute located at LOCATION that appertains to the
5634 : : class type CLASS_TYPE that has not been properly placed after its
5635 : : class-key, in it class-specifier. */
5636 : :
5637 : : void
5638 : 102 : warn_misplaced_attr_for_class_type (location_t location,
5639 : : tree class_type)
5640 : : {
5641 : 102 : gcc_assert (OVERLOAD_TYPE_P (class_type));
5642 : :
5643 : 102 : auto_diagnostic_group d;
5644 : 102 : if (warning_at (location, OPT_Wattributes,
5645 : : "attribute ignored in declaration "
5646 : : "of %q#T", class_type))
5647 : 102 : inform (location,
5648 : : "attribute for %q#T must follow the %qs keyword",
5649 : : class_type, class_key_or_enum_as_string (class_type));
5650 : 102 : }
5651 : :
5652 : : /* Returns the cv-qualifiers that apply to the type specified
5653 : : by the DECLSPECS. */
5654 : :
5655 : : static int
5656 : 880226620 : get_type_quals (const cp_decl_specifier_seq *declspecs)
5657 : : {
5658 : 880226620 : int type_quals = TYPE_UNQUALIFIED;
5659 : :
5660 : 880226620 : if (decl_spec_seq_has_spec_p (declspecs, ds_const))
5661 : 97022100 : type_quals |= TYPE_QUAL_CONST;
5662 : 880226620 : if (decl_spec_seq_has_spec_p (declspecs, ds_volatile))
5663 : 1523780 : type_quals |= TYPE_QUAL_VOLATILE;
5664 : 880226620 : if (decl_spec_seq_has_spec_p (declspecs, ds_restrict))
5665 : 34 : type_quals |= TYPE_QUAL_RESTRICT;
5666 : :
5667 : 880226620 : return type_quals;
5668 : : }
5669 : :
5670 : : /* Make sure that a declaration with no declarator is well-formed, i.e.
5671 : : just declares a tagged type or anonymous union.
5672 : :
5673 : : Returns the type declared; or NULL_TREE if none. */
5674 : :
5675 : : tree
5676 : 31202034 : check_tag_decl (cp_decl_specifier_seq *declspecs,
5677 : : bool explicit_type_instantiation_p)
5678 : : {
5679 : 31202034 : int saw_friend = decl_spec_seq_has_spec_p (declspecs, ds_friend);
5680 : 31202034 : int saw_typedef = decl_spec_seq_has_spec_p (declspecs, ds_typedef);
5681 : : /* If a class, struct, or enum type is declared by the DECLSPECS
5682 : : (i.e, if a class-specifier, enum-specifier, or non-typename
5683 : : elaborated-type-specifier appears in the DECLSPECS),
5684 : : DECLARED_TYPE is set to the corresponding type. */
5685 : 31202034 : tree declared_type = NULL_TREE;
5686 : 31202034 : bool error_p = false;
5687 : :
5688 : 31202034 : if (declspecs->multiple_types_p)
5689 : 26 : error_at (smallest_type_location (declspecs),
5690 : : "multiple types in one declaration");
5691 : 31202008 : else if (declspecs->redefined_builtin_type)
5692 : : {
5693 : 21 : location_t loc = declspecs->locations[ds_redefined_builtin_type_spec];
5694 : 21 : if (!in_system_header_at (loc))
5695 : 9 : permerror (loc, "redeclaration of C++ built-in type %qT",
5696 : : declspecs->redefined_builtin_type);
5697 : 21 : return NULL_TREE;
5698 : : }
5699 : :
5700 : 31202013 : if (declspecs->type
5701 : 31201998 : && TYPE_P (declspecs->type)
5702 : 62221078 : && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
5703 : 31017681 : && MAYBE_CLASS_TYPE_P (declspecs->type))
5704 : 1589856 : || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
5705 : : declared_type = declspecs->type;
5706 : 184374 : else if (declspecs->type == error_mark_node)
5707 : 1462 : error_p = true;
5708 : :
5709 : 31202013 : if (type_uses_auto (declared_type))
5710 : : {
5711 : 8 : error_at (declspecs->locations[ds_type_spec],
5712 : : "%<auto%> can only be specified for variables "
5713 : : "or function declarations");
5714 : 8 : return error_mark_node;
5715 : : }
5716 : :
5717 : 31202005 : if (declared_type && !OVERLOAD_TYPE_P (declared_type))
5718 : : declared_type = NULL_TREE;
5719 : :
5720 : 31202005 : if (!declared_type && !saw_friend && !error_p)
5721 : 88 : permerror (input_location, "declaration does not declare anything");
5722 : : /* Check for an anonymous union. */
5723 : 31017604 : else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
5724 : 90150965 : && TYPE_UNNAMED_P (declared_type))
5725 : : {
5726 : : /* 7/3 In a simple-declaration, the optional init-declarator-list
5727 : : can be omitted only when declaring a class (clause 9) or
5728 : : enumeration (7.2), that is, when the decl-specifier-seq contains
5729 : : either a class-specifier, an elaborated-type-specifier with
5730 : : a class-key (9.1), or an enum-specifier. In these cases and
5731 : : whenever a class-specifier or enum-specifier is present in the
5732 : : decl-specifier-seq, the identifiers in these specifiers are among
5733 : : the names being declared by the declaration (as class-name,
5734 : : enum-names, or enumerators, depending on the syntax). In such
5735 : : cases, and except for the declaration of an unnamed bit-field (9.6),
5736 : : the decl-specifier-seq shall introduce one or more names into the
5737 : : program, or shall redeclare a name introduced by a previous
5738 : : declaration. [Example:
5739 : : enum { }; // ill-formed
5740 : : typedef class { }; // ill-formed
5741 : : --end example] */
5742 : 90700 : if (saw_typedef)
5743 : : {
5744 : 6 : error_at (declspecs->locations[ds_typedef],
5745 : : "missing type-name in typedef-declaration");
5746 : 6 : return NULL_TREE;
5747 : : }
5748 : 90694 : /* Anonymous unions are objects, so they can have specifiers. */;
5749 : 90694 : SET_ANON_AGGR_TYPE_P (declared_type);
5750 : :
5751 : 90694 : if (TREE_CODE (declared_type) != UNION_TYPE)
5752 : 19642 : pedwarn (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (declared_type)),
5753 : : OPT_Wpedantic, "ISO C++ prohibits anonymous structs");
5754 : : }
5755 : :
5756 : : else
5757 : : {
5758 : 31111217 : if (decl_spec_seq_has_spec_p (declspecs, ds_inline))
5759 : 9 : error_at (declspecs->locations[ds_inline],
5760 : : "%<inline%> can only be specified for functions");
5761 : 31111208 : else if (decl_spec_seq_has_spec_p (declspecs, ds_virtual))
5762 : 3 : error_at (declspecs->locations[ds_virtual],
5763 : : "%<virtual%> can only be specified for functions");
5764 : 31111205 : else if (saw_friend
5765 : 31111205 : && (!current_class_type
5766 : 1609668 : || current_scope () != current_class_type))
5767 : 0 : error_at (declspecs->locations[ds_friend],
5768 : : "%<friend%> can only be specified inside a class");
5769 : 31111205 : else if (decl_spec_seq_has_spec_p (declspecs, ds_explicit))
5770 : 3 : error_at (declspecs->locations[ds_explicit],
5771 : : "%<explicit%> can only be specified for constructors");
5772 : 31111202 : else if (declspecs->storage_class)
5773 : 3 : error_at (declspecs->locations[ds_storage_class],
5774 : : "a storage class can only be specified for objects "
5775 : : "and functions");
5776 : 31111199 : else if (decl_spec_seq_has_spec_p (declspecs, ds_const))
5777 : 9 : error_at (declspecs->locations[ds_const],
5778 : : "%<const%> can only be specified for objects and "
5779 : : "functions");
5780 : 31111190 : else if (decl_spec_seq_has_spec_p (declspecs, ds_volatile))
5781 : 3 : error_at (declspecs->locations[ds_volatile],
5782 : : "%<volatile%> can only be specified for objects and "
5783 : : "functions");
5784 : 31111187 : else if (decl_spec_seq_has_spec_p (declspecs, ds_restrict))
5785 : 3 : error_at (declspecs->locations[ds_restrict],
5786 : : "%<__restrict%> can only be specified for objects and "
5787 : : "functions");
5788 : 31111184 : else if (decl_spec_seq_has_spec_p (declspecs, ds_thread))
5789 : 3 : error_at (declspecs->locations[ds_thread],
5790 : : "%<__thread%> can only be specified for objects "
5791 : : "and functions");
5792 : 31111181 : else if (saw_typedef)
5793 : 24 : warning_at (declspecs->locations[ds_typedef], 0,
5794 : : "%<typedef%> was ignored in this declaration");
5795 : 31111157 : else if (decl_spec_seq_has_spec_p (declspecs, ds_constexpr))
5796 : 9 : error_at (declspecs->locations[ds_constexpr],
5797 : : "%qs cannot be used for type declarations", "constexpr");
5798 : 31111148 : else if (decl_spec_seq_has_spec_p (declspecs, ds_constinit))
5799 : 3 : error_at (declspecs->locations[ds_constinit],
5800 : : "%qs cannot be used for type declarations", "constinit");
5801 : 31111145 : else if (decl_spec_seq_has_spec_p (declspecs, ds_consteval))
5802 : 3 : error_at (declspecs->locations[ds_consteval],
5803 : : "%qs cannot be used for type declarations", "consteval");
5804 : : }
5805 : :
5806 : 31201999 : if (declspecs->attributes && warn_attributes && declared_type)
5807 : : {
5808 : 31 : location_t loc;
5809 : 25 : if (!CLASS_TYPE_P (declared_type)
5810 : 56 : || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type))
5811 : : /* For a non-template class, use the name location. */
5812 : 22 : loc = location_of (declared_type);
5813 : : else
5814 : : /* For a template class (an explicit instantiation), use the
5815 : : current location. */
5816 : 9 : loc = input_location;
5817 : :
5818 : 31 : if (explicit_type_instantiation_p)
5819 : : /* [dcl.attr.grammar]/4:
5820 : :
5821 : : No attribute-specifier-seq shall appertain to an explicit
5822 : : instantiation. */
5823 : : {
5824 : 6 : auto_diagnostic_group d;
5825 : 6 : if (warning_at (loc, OPT_Wattributes,
5826 : : "attribute ignored in explicit instantiation %q#T",
5827 : : declared_type))
5828 : 6 : inform (loc,
5829 : : "no attribute can be applied to "
5830 : : "an explicit instantiation");
5831 : 6 : }
5832 : : else
5833 : 25 : warn_misplaced_attr_for_class_type (loc, declared_type);
5834 : : }
5835 : :
5836 : 31201999 : if (declspecs->std_attributes
5837 : 77 : && declared_type
5838 : 31202073 : && any_nonignored_attribute_p (declspecs->std_attributes))
5839 : : {
5840 : 74 : auto_diagnostic_group d;
5841 : 74 : if (warning_at (declspecs->locations[ds_std_attribute], OPT_Wattributes,
5842 : : "attribute ignored"))
5843 : 74 : inform (declspecs->locations[ds_std_attribute],
5844 : : "an attribute that appertains to a type-specifier is ignored");
5845 : 74 : }
5846 : :
5847 : : /* Diagnose invalid application of contracts, if any. */
5848 : 31201999 : if (find_contract (declspecs->attributes))
5849 : 1 : diagnose_misapplied_contracts (declspecs->attributes);
5850 : : else
5851 : 31201998 : diagnose_misapplied_contracts (declspecs->std_attributes);
5852 : :
5853 : : return declared_type;
5854 : : }
5855 : :
5856 : : /* Called when a declaration is seen that contains no names to declare.
5857 : : If its type is a reference to a structure, union or enum inherited
5858 : : from a containing scope, shadow that tag name for the current scope
5859 : : with a forward reference.
5860 : : If its type defines a new named structure or union
5861 : : or defines an enum, it is valid but we need not do anything here.
5862 : : Otherwise, it is an error.
5863 : :
5864 : : C++: may have to grok the declspecs to learn about static,
5865 : : complain for anonymous unions.
5866 : :
5867 : : Returns the TYPE declared -- or NULL_TREE if none. */
5868 : :
5869 : : tree
5870 : 27355113 : shadow_tag (cp_decl_specifier_seq *declspecs)
5871 : : {
5872 : 27355113 : tree t = check_tag_decl (declspecs,
5873 : : /*explicit_type_instantiation_p=*/false);
5874 : :
5875 : 27355113 : if (!t)
5876 : : return NULL_TREE;
5877 : :
5878 : 27353641 : t = maybe_process_partial_specialization (t);
5879 : 27353641 : if (t == error_mark_node)
5880 : : return NULL_TREE;
5881 : :
5882 : : /* This is where the variables in an anonymous union are
5883 : : declared. An anonymous union declaration looks like:
5884 : : union { ... } ;
5885 : : because there is no declarator after the union, the parser
5886 : : sends that declaration here. */
5887 : 27352487 : if (ANON_AGGR_TYPE_P (t))
5888 : : {
5889 : 245 : fixup_anonymous_aggr (t);
5890 : :
5891 : 245 : if (TYPE_FIELDS (t))
5892 : : {
5893 : 245 : tree decl = grokdeclarator (/*declarator=*/NULL,
5894 : : declspecs, NORMAL, 0, NULL);
5895 : 245 : finish_anon_union (decl);
5896 : : }
5897 : : }
5898 : :
5899 : : return t;
5900 : : }
5901 : :
5902 : : /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
5903 : :
5904 : : tree
5905 : 326005225 : groktypename (cp_decl_specifier_seq *type_specifiers,
5906 : : const cp_declarator *declarator,
5907 : : bool is_template_arg)
5908 : : {
5909 : 326005225 : tree attrs;
5910 : 326005225 : tree type;
5911 : 652010450 : enum decl_context context
5912 : 326005225 : = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
5913 : 326005225 : attrs = type_specifiers->attributes;
5914 : 326005225 : type_specifiers->attributes = NULL_TREE;
5915 : 326005225 : type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
5916 : 326005225 : if (attrs && type != error_mark_node)
5917 : : {
5918 : 580 : if (CLASS_TYPE_P (type))
5919 : 6 : warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
5920 : : "outside of definition", type);
5921 : 574 : else if (MAYBE_CLASS_TYPE_P (type))
5922 : : /* A template type parameter or other dependent type. */
5923 : 9 : warning (OPT_Wattributes, "ignoring attributes applied to dependent "
5924 : : "type %qT without an associated declaration", type);
5925 : : else
5926 : 565 : cplus_decl_attributes (&type, attrs, 0);
5927 : : }
5928 : 326005225 : return type;
5929 : : }
5930 : :
5931 : : /* Process a DECLARATOR for a function-scope or namespace-scope
5932 : : variable or function declaration.
5933 : : (Function definitions go through start_function; class member
5934 : : declarations appearing in the body of the class go through
5935 : : grokfield.) The DECL corresponding to the DECLARATOR is returned.
5936 : : If an error occurs, the error_mark_node is returned instead.
5937 : :
5938 : : DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
5939 : : SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
5940 : : for an explicitly defaulted function, or SD_DELETED for an explicitly
5941 : : deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
5942 : : implicitly initialized via a default constructor. It can also be
5943 : : SD_DECOMPOSITION which behaves much like SD_INITIALIZED, but we also
5944 : : mark the new decl as DECL_DECOMPOSITION_P.
5945 : :
5946 : : ATTRIBUTES and PREFIX_ATTRIBUTES are GNU attributes associated with this
5947 : : declaration.
5948 : :
5949 : : The scope represented by the context of the returned DECL is pushed
5950 : : (if it is not the global namespace) and is assigned to
5951 : : *PUSHED_SCOPE_P. The caller is then responsible for calling
5952 : : pop_scope on *PUSHED_SCOPE_P if it is set. */
5953 : :
5954 : : tree
5955 : 108439607 : start_decl (const cp_declarator *declarator,
5956 : : cp_decl_specifier_seq *declspecs,
5957 : : int initialized,
5958 : : tree attributes,
5959 : : tree prefix_attributes,
5960 : : tree *pushed_scope_p)
5961 : : {
5962 : 108439607 : tree decl;
5963 : 108439607 : tree context;
5964 : 108439607 : bool was_public;
5965 : 108439607 : int flags;
5966 : 108439607 : bool alias;
5967 : 108439607 : tree initial;
5968 : :
5969 : 108439607 : *pushed_scope_p = NULL_TREE;
5970 : :
5971 : 108439607 : if (prefix_attributes != error_mark_node)
5972 : 108439605 : attributes = attr_chainon (attributes, prefix_attributes);
5973 : :
5974 : 108439607 : decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
5975 : : &attributes);
5976 : :
5977 : 108439607 : if (decl == NULL_TREE || VOID_TYPE_P (decl)
5978 : 108439607 : || decl == error_mark_node
5979 : 108437490 : || prefix_attributes == error_mark_node)
5980 : 2119 : return error_mark_node;
5981 : :
5982 : 108437488 : context = CP_DECL_CONTEXT (decl);
5983 : 108437488 : if (context != global_namespace)
5984 : 16839193 : *pushed_scope_p = push_scope (context);
5985 : :
5986 : 108437488 : if (initialized && TREE_CODE (decl) == TYPE_DECL)
5987 : : {
5988 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
5989 : : "typedef %qD is initialized (use %qs instead)",
5990 : : decl, "decltype");
5991 : 9 : return error_mark_node;
5992 : : }
5993 : :
5994 : : /* Save the DECL_INITIAL value in case it gets clobbered to assist
5995 : : with attribute validation. */
5996 : 108437479 : initial = DECL_INITIAL (decl);
5997 : :
5998 : 108437479 : if (initialized)
5999 : : {
6000 : 47876154 : if (! toplevel_bindings_p ()
6001 : 47876154 : && DECL_EXTERNAL (decl))
6002 : 3 : warning (0, "declaration of %q#D has %<extern%> and is initialized",
6003 : : decl);
6004 : 47876154 : DECL_EXTERNAL (decl) = 0;
6005 : 47876154 : if (toplevel_bindings_p ())
6006 : 4072429 : TREE_STATIC (decl) = 1;
6007 : : /* Tell 'cplus_decl_attributes' this is an initialized decl,
6008 : : even though we might not yet have the initializer expression. */
6009 : 47876154 : if (!DECL_INITIAL (decl))
6010 : 47540617 : DECL_INITIAL (decl) = error_mark_node;
6011 : : }
6012 : 108437479 : alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
6013 : :
6014 : 108437479 : if (alias && TREE_CODE (decl) == FUNCTION_DECL)
6015 : 3858 : record_key_method_defined (decl);
6016 : :
6017 : : /* If this is a typedef that names the class for linkage purposes
6018 : : (7.1.3p8), apply any attributes directly to the type. */
6019 : 108437479 : if (TREE_CODE (decl) == TYPE_DECL
6020 : 19200800 : && OVERLOAD_TYPE_P (TREE_TYPE (decl))
6021 : 115949695 : && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
6022 : : flags = ATTR_FLAG_TYPE_IN_PLACE;
6023 : : else
6024 : : flags = 0;
6025 : :
6026 : : /* Set attributes here so if duplicate decl, will have proper attributes. */
6027 : 108437479 : cplus_decl_attributes (&decl, attributes, flags);
6028 : :
6029 : : /* Restore the original DECL_INITIAL that we may have clobbered earlier to
6030 : : assist with attribute validation. */
6031 : 108437479 : DECL_INITIAL (decl) = initial;
6032 : :
6033 : : /* Dllimported symbols cannot be defined. Static data members (which
6034 : : can be initialized in-class and dllimported) go through grokfield,
6035 : : not here, so we don't need to exclude those decls when checking for
6036 : : a definition. */
6037 : 108437479 : if (initialized && DECL_DLLIMPORT_P (decl))
6038 : : {
6039 : 0 : error_at (DECL_SOURCE_LOCATION (decl),
6040 : : "definition of %q#D is marked %<dllimport%>", decl);
6041 : 0 : DECL_DLLIMPORT_P (decl) = 0;
6042 : : }
6043 : :
6044 : : /* If #pragma weak was used, mark the decl weak now. */
6045 : 108437479 : if (!processing_template_decl && !DECL_DECOMPOSITION_P (decl))
6046 : 41213006 : maybe_apply_pragma_weak (decl);
6047 : :
6048 : 108437479 : if (TREE_CODE (decl) == FUNCTION_DECL
6049 : 35655535 : && DECL_DECLARED_INLINE_P (decl)
6050 : 1843941 : && DECL_UNINLINABLE (decl)
6051 : 108437479 : && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
6052 : : {
6053 : 0 : auto_urlify_attributes sentinel;
6054 : 0 : warning_at (DECL_SOURCE_LOCATION (decl), 0,
6055 : : "inline function %qD given attribute %qs", decl, "noinline");
6056 : 0 : }
6057 : :
6058 : 108437479 : if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
6059 : : {
6060 : 728844 : bool this_tmpl = (current_template_depth
6061 : 728844 : > template_class_depth (context));
6062 : 728844 : if (VAR_P (decl))
6063 : : {
6064 : 371585 : tree field = lookup_field (context, DECL_NAME (decl), 0, false);
6065 : 371585 : if (field == NULL_TREE
6066 : 371585 : || !(VAR_P (field) || variable_template_p (field)))
6067 : 7 : error ("%q+#D is not a static data member of %q#T", decl, context);
6068 : 371578 : else if (variable_template_p (field)
6069 : 371578 : && (DECL_LANG_SPECIFIC (decl)
6070 : 105 : && DECL_TEMPLATE_SPECIALIZATION (decl)))
6071 : : /* OK, specialization was already checked. */;
6072 : 371515 : else if (variable_template_p (field) && !this_tmpl)
6073 : : {
6074 : 3 : auto_diagnostic_group d;
6075 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
6076 : : "non-member-template declaration of %qD", decl);
6077 : 3 : inform (DECL_SOURCE_LOCATION (field), "does not match "
6078 : : "member template declaration here");
6079 : 3 : return error_mark_node;
6080 : 3 : }
6081 : : else
6082 : : {
6083 : 371512 : if (variable_template_p (field))
6084 : 39 : field = DECL_TEMPLATE_RESULT (field);
6085 : :
6086 : 371512 : if (DECL_CONTEXT (field) != context)
6087 : : {
6088 : 3 : if (!same_type_p (DECL_CONTEXT (field), context))
6089 : 3 : permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
6090 : : "to be defined as %<%T::%D%>",
6091 : 3 : DECL_CONTEXT (field), DECL_NAME (decl),
6092 : 3 : context, DECL_NAME (decl));
6093 : 3 : DECL_CONTEXT (decl) = DECL_CONTEXT (field);
6094 : : }
6095 : : /* Static data member are tricky; an in-class initialization
6096 : : still doesn't provide a definition, so the in-class
6097 : : declaration will have DECL_EXTERNAL set, but will have an
6098 : : initialization. Thus, duplicate_decls won't warn
6099 : : about this situation, and so we check here. */
6100 : 371512 : if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
6101 : 9 : error ("duplicate initialization of %qD", decl);
6102 : 371512 : field = duplicate_decls (decl, field);
6103 : 371512 : if (field == error_mark_node)
6104 : : return error_mark_node;
6105 : 371456 : else if (field)
6106 : 371456 : decl = field;
6107 : : }
6108 : : }
6109 : : else
6110 : : {
6111 : 357272 : tree field = check_classfn (context, decl,
6112 : : this_tmpl
6113 : 13 : ? current_template_parms
6114 : : : NULL_TREE);
6115 : 357187 : if (field && field != error_mark_node
6116 : 714446 : && duplicate_decls (decl, field))
6117 : 357186 : decl = field;
6118 : : }
6119 : :
6120 : : /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
6121 : 728785 : DECL_IN_AGGR_P (decl) = 0;
6122 : : /* Do not mark DECL as an explicit specialization if it was not
6123 : : already marked as an instantiation; a declaration should
6124 : : never be marked as a specialization unless we know what
6125 : : template is being specialized. */
6126 : 728785 : if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
6127 : : {
6128 : 355761 : SET_DECL_TEMPLATE_SPECIALIZATION (decl);
6129 : 355761 : if (TREE_CODE (decl) == FUNCTION_DECL)
6130 : 335120 : DECL_COMDAT (decl) = (TREE_PUBLIC (decl)
6131 : 335120 : && DECL_DECLARED_INLINE_P (decl));
6132 : : else
6133 : 20641 : DECL_COMDAT (decl) = false;
6134 : :
6135 : : /* [temp.expl.spec] An explicit specialization of a static data
6136 : : member of a template is a definition if the declaration
6137 : : includes an initializer; otherwise, it is a declaration.
6138 : :
6139 : : We check for processing_specialization so this only applies
6140 : : to the new specialization syntax. */
6141 : 355761 : if (!initialized && processing_specialization)
6142 : 355568 : DECL_EXTERNAL (decl) = 1;
6143 : : }
6144 : :
6145 : 1084422 : if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
6146 : : /* Aliases are definitions. */
6147 : 728842 : && !alias)
6148 : : {
6149 : 30 : if (DECL_VIRTUAL_P (decl) || !flag_contracts)
6150 : 11 : permerror (declarator->id_loc,
6151 : : "declaration of %q#D outside of class is not definition",
6152 : : decl);
6153 : 19 : else if (flag_contract_strict_declarations)
6154 : 4 : warning_at (declarator->id_loc, OPT_fcontract_strict_declarations_,
6155 : : "declaration of %q#D outside of class is not definition",
6156 : : decl);
6157 : : }
6158 : : }
6159 : :
6160 : : /* Create a DECL_LANG_SPECIFIC so that DECL_DECOMPOSITION_P works. */
6161 : 108437420 : if (initialized == SD_DECOMPOSITION)
6162 : 150615 : fit_decomposition_lang_decl (decl, NULL_TREE);
6163 : :
6164 : 108437420 : was_public = TREE_PUBLIC (decl);
6165 : :
6166 : 180984381 : if ((DECL_EXTERNAL (decl) || TREE_CODE (decl) == FUNCTION_DECL)
6167 : 108772975 : && current_function_decl)
6168 : : {
6169 : : /* A function-scope decl of some namespace-scope decl. */
6170 : 36060 : DECL_LOCAL_DECL_P (decl) = true;
6171 : 36060 : if (named_module_attach_p ())
6172 : 3 : error_at (declarator->id_loc,
6173 : : "block-scope extern declaration %q#D must not be"
6174 : : " attached to a named module", decl);
6175 : : }
6176 : :
6177 : : /* Enter this declaration into the symbol table. Don't push the plain
6178 : : VAR_DECL for a variable template. */
6179 : 108437420 : if (!template_parm_scope_p ()
6180 : 108437420 : || !VAR_P (decl))
6181 : 105847416 : decl = maybe_push_decl (decl);
6182 : :
6183 : 108437420 : if (processing_template_decl)
6184 : 67218942 : decl = push_template_decl (decl);
6185 : :
6186 : 108437420 : if (decl == error_mark_node)
6187 : : return error_mark_node;
6188 : :
6189 : 108437038 : if (VAR_P (decl)
6190 : 53580885 : && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
6191 : 65518 : && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl)
6192 : : /* But not templated variables. */
6193 : 108464005 : && !(DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)))
6194 : : {
6195 : : /* This is a const variable with implicit 'static'. Set
6196 : : DECL_THIS_STATIC so we can tell it from variables that are
6197 : : !TREE_PUBLIC because of the anonymous namespace. */
6198 : 26967 : gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
6199 : 26967 : DECL_THIS_STATIC (decl) = 1;
6200 : : }
6201 : :
6202 : 59755776 : if (current_function_decl && VAR_P (decl)
6203 : 48580539 : && DECL_DECLARED_CONSTEXPR_P (current_function_decl)
6204 : 113373823 : && cxx_dialect < cxx23)
6205 : : {
6206 : 2545372 : bool ok = false;
6207 : 2545372 : if (CP_DECL_THREAD_LOCAL_P (decl) && !DECL_REALLY_EXTERN (decl))
6208 : 20 : error_at (DECL_SOURCE_LOCATION (decl),
6209 : : "%qD defined %<thread_local%> in %qs function only "
6210 : : "available with %<-std=c++23%> or %<-std=gnu++23%>", decl,
6211 : 10 : DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
6212 : : ? "consteval" : "constexpr");
6213 : 2545362 : else if (TREE_STATIC (decl))
6214 : 76 : error_at (DECL_SOURCE_LOCATION (decl),
6215 : : "%qD defined %<static%> in %qs function only available "
6216 : : "with %<-std=c++23%> or %<-std=gnu++23%>", decl,
6217 : 38 : DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
6218 : : ? "consteval" : "constexpr");
6219 : : else
6220 : : ok = true;
6221 : 48 : if (!ok)
6222 : 48 : cp_function_chain->invalid_constexpr = true;
6223 : : }
6224 : :
6225 : 108437038 : if (!processing_template_decl && VAR_P (decl))
6226 : 5187873 : start_decl_1 (decl, initialized);
6227 : :
6228 : 108437035 : return decl;
6229 : : }
6230 : :
6231 : : /* Process the declaration of a variable DECL. INITIALIZED is true
6232 : : iff DECL is explicitly initialized. (INITIALIZED is false if the
6233 : : variable is initialized via an implicitly-called constructor.)
6234 : : This function must be called for ordinary variables (including, for
6235 : : example, implicit instantiations of templates), but must not be
6236 : : called for template declarations. */
6237 : :
6238 : : void
6239 : 5195650 : start_decl_1 (tree decl, bool initialized)
6240 : : {
6241 : 5195650 : gcc_checking_assert (!processing_template_decl);
6242 : :
6243 : 5195650 : if (error_operand_p (decl))
6244 : : return;
6245 : :
6246 : 5195635 : gcc_checking_assert (VAR_P (decl));
6247 : :
6248 : 5195635 : tree type = TREE_TYPE (decl);
6249 : 5195635 : bool complete_p = COMPLETE_TYPE_P (type);
6250 : 5195635 : bool aggregate_definition_p
6251 : 5195635 : = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
6252 : :
6253 : : /* If an explicit initializer is present, or if this is a definition
6254 : : of an aggregate, then we need a complete type at this point.
6255 : : (Scalars are always complete types, so there is nothing to
6256 : : check.) This code just sets COMPLETE_P; errors (if necessary)
6257 : : are issued below. */
6258 : 3269440 : if ((initialized || aggregate_definition_p)
6259 : 4206179 : && !complete_p
6260 : 4164830 : && COMPLETE_TYPE_P (complete_type (type)))
6261 : : {
6262 : 328277 : complete_p = true;
6263 : : /* We will not yet have set TREE_READONLY on DECL if the type
6264 : : was "const", but incomplete, before this point. But, now, we
6265 : : have a complete type, so we can try again. */
6266 : 328277 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
6267 : : }
6268 : :
6269 : 5195632 : if (initialized)
6270 : : /* Is it valid for this decl to have an initializer at all? */
6271 : : {
6272 : : /* Don't allow initializations for incomplete types except for
6273 : : arrays which might be completed by the initialization. */
6274 : 3594978 : if (complete_p)
6275 : : ; /* A complete type is ok. */
6276 : 566886 : else if (type_uses_auto (type))
6277 : : ; /* An auto type is ok. */
6278 : 62802 : else if (TREE_CODE (type) != ARRAY_TYPE)
6279 : : {
6280 : 24 : auto_diagnostic_group d;
6281 : 24 : error ("variable %q#D has initializer but incomplete type", decl);
6282 : 42 : maybe_suggest_missing_header (input_location,
6283 : 24 : TYPE_IDENTIFIER (type),
6284 : 24 : CP_TYPE_CONTEXT (type));
6285 : 24 : type = TREE_TYPE (decl) = error_mark_node;
6286 : 24 : }
6287 : 62778 : else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
6288 : : {
6289 : 0 : if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
6290 : 0 : error ("elements of array %q#D have incomplete type", decl);
6291 : : /* else we already gave an error in start_decl. */
6292 : : }
6293 : : }
6294 : 1600654 : else if (aggregate_definition_p && !complete_p)
6295 : : {
6296 : 224 : if (type_uses_auto (type))
6297 : 64 : gcc_assert (CLASS_PLACEHOLDER_TEMPLATE (type));
6298 : : else
6299 : : {
6300 : 160 : auto_diagnostic_group d;
6301 : 160 : error ("aggregate %q#D has incomplete type and cannot be defined",
6302 : : decl);
6303 : 275 : maybe_suggest_missing_header (input_location,
6304 : 160 : TYPE_IDENTIFIER (type),
6305 : 160 : CP_TYPE_CONTEXT (type));
6306 : : /* Change the type so that assemble_variable will give
6307 : : DECL an rtl we can live with: (mem (const_int 0)). */
6308 : 160 : type = TREE_TYPE (decl) = error_mark_node;
6309 : 160 : }
6310 : : }
6311 : :
6312 : : /* Create a new scope to hold this declaration if necessary.
6313 : : Whether or not a new scope is necessary cannot be determined
6314 : : until after the type has been completed; if the type is a
6315 : : specialization of a class template it is not until after
6316 : : instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
6317 : : will be set correctly. */
6318 : 5195632 : maybe_push_cleanup_level (type);
6319 : : }
6320 : :
6321 : : /* Given a parenthesized list of values INIT, create a CONSTRUCTOR to handle
6322 : : C++20 P0960. TYPE is the type of the object we're initializing. */
6323 : :
6324 : : tree
6325 : 239 : do_aggregate_paren_init (tree init, tree type)
6326 : : {
6327 : 239 : tree val = TREE_VALUE (init);
6328 : :
6329 : 239 : if (TREE_CHAIN (init) == NULL_TREE)
6330 : : {
6331 : : /* If the list has a single element and it's a string literal,
6332 : : then it's the initializer for the array as a whole. */
6333 : 124 : if (TREE_CODE (type) == ARRAY_TYPE
6334 : 124 : && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
6335 : 155 : && TREE_CODE (tree_strip_any_location_wrapper (val))
6336 : : == STRING_CST)
6337 : : return val;
6338 : : /* Handle non-standard extensions like compound literals. This also
6339 : : prevents triggering aggregate parenthesized-initialization in
6340 : : compiler-generated code for =default. */
6341 : 97 : else if (same_type_ignoring_top_level_qualifiers_p (type,
6342 : 97 : TREE_TYPE (val)))
6343 : : return val;
6344 : : }
6345 : :
6346 : 187 : init = build_constructor_from_list (init_list_type_node, init);
6347 : 187 : CONSTRUCTOR_IS_DIRECT_INIT (init) = true;
6348 : 187 : CONSTRUCTOR_IS_PAREN_INIT (init) = true;
6349 : 187 : return init;
6350 : : }
6351 : :
6352 : : /* Handle initialization of references. DECL, TYPE, and INIT have the
6353 : : same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
6354 : : but will be set to a new CLEANUP_STMT if a temporary is created
6355 : : that must be destroyed subsequently.
6356 : :
6357 : : Returns an initializer expression to use to initialize DECL, or
6358 : : NULL if the initialization can be performed statically.
6359 : :
6360 : : Quotes on semantics can be found in ARM 8.4.3. */
6361 : :
6362 : : static tree
6363 : 301691 : grok_reference_init (tree decl, tree type, tree init, int flags)
6364 : : {
6365 : 301691 : if (init == NULL_TREE)
6366 : : {
6367 : 15 : if ((DECL_LANG_SPECIFIC (decl) == 0
6368 : 3 : || DECL_IN_AGGR_P (decl) == 0)
6369 : 18 : && ! DECL_THIS_EXTERN (decl))
6370 : 15 : error_at (DECL_SOURCE_LOCATION (decl),
6371 : : "%qD declared as reference but not initialized", decl);
6372 : 15 : return NULL_TREE;
6373 : : }
6374 : :
6375 : 301676 : tree ttype = TREE_TYPE (type);
6376 : 301676 : if (TREE_CODE (init) == TREE_LIST)
6377 : : {
6378 : : /* This handles (C++20 only) code like
6379 : :
6380 : : const A& r(1, 2, 3);
6381 : :
6382 : : where we treat the parenthesized list as a CONSTRUCTOR. */
6383 : 1210 : if (TREE_TYPE (init) == NULL_TREE
6384 : 1210 : && CP_AGGREGATE_TYPE_P (ttype)
6385 : 54 : && !DECL_DECOMPOSITION_P (decl)
6386 : 1261 : && (cxx_dialect >= cxx20))
6387 : : {
6388 : : /* We don't know yet if we should treat const A& r(1) as
6389 : : const A& r{1}. */
6390 : 33 : if (list_length (init) == 1)
6391 : : {
6392 : 12 : flags |= LOOKUP_AGGREGATE_PAREN_INIT;
6393 : 12 : init = build_x_compound_expr_from_list (init, ELK_INIT,
6394 : : tf_warning_or_error);
6395 : : }
6396 : : /* If the list had more than one element, the code is ill-formed
6397 : : pre-C++20, so we can build a constructor right away. */
6398 : : else
6399 : 21 : init = do_aggregate_paren_init (init, ttype);
6400 : : }
6401 : : else
6402 : 1177 : init = build_x_compound_expr_from_list (init, ELK_INIT,
6403 : : tf_warning_or_error);
6404 : : }
6405 : :
6406 : 301676 : if (TREE_CODE (ttype) != ARRAY_TYPE
6407 : 301676 : && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
6408 : : /* Note: default conversion is only called in very special cases. */
6409 : 12 : init = decay_conversion (init, tf_warning_or_error);
6410 : :
6411 : : /* check_initializer handles this for non-reference variables, but for
6412 : : references we need to do it here or the initializer will get the
6413 : : incomplete array type and confuse later calls to
6414 : : cp_complete_array_type. */
6415 : 301676 : if (TREE_CODE (ttype) == ARRAY_TYPE
6416 : 7468 : && TYPE_DOMAIN (ttype) == NULL_TREE
6417 : 301759 : && (BRACE_ENCLOSED_INITIALIZER_P (init)
6418 : 50 : || TREE_CODE (init) == STRING_CST))
6419 : : {
6420 : 33 : cp_complete_array_type (&ttype, init, false);
6421 : 33 : if (ttype != TREE_TYPE (type))
6422 : 33 : type = cp_build_reference_type (ttype, TYPE_REF_IS_RVALUE (type));
6423 : : }
6424 : :
6425 : : /* Convert INIT to the reference type TYPE. This may involve the
6426 : : creation of a temporary, whose lifetime must be the same as that
6427 : : of the reference. If so, a DECL_EXPR for the temporary will be
6428 : : added just after the DECL_EXPR for DECL. That's why we don't set
6429 : : DECL_INITIAL for local references (instead assigning to them
6430 : : explicitly); we need to allow the temporary to be initialized
6431 : : first. */
6432 : 301676 : return initialize_reference (type, init, flags,
6433 : 301676 : tf_warning_or_error);
6434 : : }
6435 : :
6436 : : /* Designated initializers in arrays are not supported in GNU C++.
6437 : : The parser cannot detect this error since it does not know whether
6438 : : a given brace-enclosed initializer is for a class type or for an
6439 : : array. This function checks that CE does not use a designated
6440 : : initializer. If it does, an error is issued. Returns true if CE
6441 : : is valid, i.e., does not have a designated initializer. */
6442 : :
6443 : : bool
6444 : 44795071 : check_array_designated_initializer (constructor_elt *ce,
6445 : : unsigned HOST_WIDE_INT index)
6446 : : {
6447 : : /* Designated initializers for array elements are not supported. */
6448 : 44795071 : if (ce->index)
6449 : : {
6450 : : /* The parser only allows identifiers as designated
6451 : : initializers. */
6452 : 28941950 : if (ce->index == error_mark_node)
6453 : : {
6454 : 0 : error ("name used in a GNU-style designated "
6455 : : "initializer for an array");
6456 : 0 : return false;
6457 : : }
6458 : 28941950 : else if (identifier_p (ce->index))
6459 : : {
6460 : 17 : error ("name %qD used in a GNU-style designated "
6461 : : "initializer for an array", ce->index);
6462 : 17 : return false;
6463 : : }
6464 : :
6465 : 28941933 : tree ce_index = build_expr_type_conversion (WANT_INT | WANT_ENUM,
6466 : : ce->index, true);
6467 : 28941933 : if (ce_index
6468 : 28941930 : && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index))
6469 : 57883860 : && (TREE_CODE (ce_index = fold_non_dependent_expr (ce_index))
6470 : : == INTEGER_CST))
6471 : : {
6472 : : /* A C99 designator is OK if it matches the current index. */
6473 : 28941927 : if (wi::to_wide (ce_index) == index)
6474 : : {
6475 : 28941921 : ce->index = ce_index;
6476 : 28941921 : return true;
6477 : : }
6478 : : else
6479 : 6 : sorry ("non-trivial designated initializers not supported");
6480 : : }
6481 : : else
6482 : 6 : error_at (cp_expr_loc_or_input_loc (ce->index),
6483 : : "C99 designator %qE is not an integral constant-expression",
6484 : : ce->index);
6485 : :
6486 : 12 : return false;
6487 : : }
6488 : :
6489 : : return true;
6490 : : }
6491 : :
6492 : : /* When parsing `int a[] = {1, 2};' we don't know the size of the
6493 : : array until we finish parsing the initializer. If that's the
6494 : : situation we're in, update DECL accordingly. */
6495 : :
6496 : : static void
6497 : 52954074 : maybe_deduce_size_from_array_init (tree decl, tree init)
6498 : : {
6499 : 52954074 : tree type = TREE_TYPE (decl);
6500 : :
6501 : 52954074 : if (TREE_CODE (type) == ARRAY_TYPE
6502 : 769940 : && TYPE_DOMAIN (type) == NULL_TREE
6503 : 53447996 : && TREE_CODE (decl) != TYPE_DECL)
6504 : : {
6505 : : /* do_default is really a C-ism to deal with tentative definitions.
6506 : : But let's leave it here to ease the eventual merge. */
6507 : 493922 : int do_default = !DECL_EXTERNAL (decl);
6508 : 493922 : tree initializer = init ? init : DECL_INITIAL (decl);
6509 : 493922 : int failure = 0;
6510 : :
6511 : : /* Check that there are no designated initializers in INIT, as
6512 : : those are not supported in GNU C++, and as the middle-end
6513 : : will crash if presented with a non-numeric designated
6514 : : initializer. */
6515 : 493922 : if (initializer && BRACE_ENCLOSED_INITIALIZER_P (initializer))
6516 : : {
6517 : 90010 : vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (initializer);
6518 : 90010 : constructor_elt *ce;
6519 : 90010 : HOST_WIDE_INT i, j = 0;
6520 : 14231424 : FOR_EACH_VEC_SAFE_ELT (v, i, ce)
6521 : : {
6522 : 14142770 : if (instantiation_dependent_expression_p (ce->index))
6523 : 52954074 : return;
6524 : 14142764 : if (!check_array_designated_initializer (ce, j))
6525 : 2 : failure = 1;
6526 : : /* If an un-designated initializer is type-dependent, we can't
6527 : : check brace elision yet. */
6528 : 14142764 : if (ce->index == NULL_TREE
6529 : 14142764 : && type_dependent_expression_p (ce->value))
6530 : : return;
6531 : 14141414 : if (TREE_CODE (ce->value) == RAW_DATA_CST)
6532 : 193 : j += RAW_DATA_LENGTH (ce->value);
6533 : : else
6534 : 14141221 : ++j;
6535 : : }
6536 : : }
6537 : :
6538 : 88654 : if (failure)
6539 : 2 : TREE_TYPE (decl) = error_mark_node;
6540 : : else
6541 : : {
6542 : 492564 : failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
6543 : : do_default);
6544 : 492564 : if (failure == 1)
6545 : : {
6546 : 33 : error_at (cp_expr_loc_or_loc (initializer,
6547 : 30 : DECL_SOURCE_LOCATION (decl)),
6548 : : "initializer fails to determine size of %qD", decl);
6549 : : }
6550 : 492534 : else if (failure == 2)
6551 : : {
6552 : 30 : if (do_default)
6553 : : {
6554 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
6555 : : "array size missing in %qD", decl);
6556 : : }
6557 : : /* If a `static' var's size isn't known, make it extern as
6558 : : well as static, so it does not get allocated. If it's not
6559 : : `static', then don't mark it extern; finish_incomplete_decl
6560 : : will give it a default size and it will get allocated. */
6561 : 24 : else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
6562 : 0 : DECL_EXTERNAL (decl) = 1;
6563 : : }
6564 : 492504 : else if (failure == 3)
6565 : : {
6566 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
6567 : : "zero-size array %qD", decl);
6568 : : }
6569 : : }
6570 : :
6571 : 492566 : cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
6572 : :
6573 : 492566 : relayout_decl (decl);
6574 : : }
6575 : : }
6576 : :
6577 : : /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
6578 : : any appropriate error messages regarding the layout. */
6579 : :
6580 : : static void
6581 : 44927532 : layout_var_decl (tree decl)
6582 : : {
6583 : 44927532 : tree type;
6584 : :
6585 : 44927532 : type = TREE_TYPE (decl);
6586 : 44927532 : if (type == error_mark_node)
6587 : : return;
6588 : :
6589 : : /* If we haven't already laid out this declaration, do so now.
6590 : : Note that we must not call complete type for an external object
6591 : : because it's type might involve templates that we are not
6592 : : supposed to instantiate yet. (And it's perfectly valid to say
6593 : : `extern X x' for some incomplete type `X'.) */
6594 : 44927484 : if (!DECL_EXTERNAL (decl))
6595 : 36587112 : complete_type (type);
6596 : 44927484 : if (!DECL_SIZE (decl)
6597 : 496339 : && TREE_TYPE (decl) != error_mark_node
6598 : 45423823 : && complete_or_array_type_p (type))
6599 : 457501 : layout_decl (decl, 0);
6600 : :
6601 : 44927484 : if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
6602 : : {
6603 : : /* An automatic variable with an incomplete type: that is an error.
6604 : : Don't talk about array types here, since we took care of that
6605 : : message in grokdeclarator. */
6606 : 17 : error_at (DECL_SOURCE_LOCATION (decl),
6607 : : "storage size of %qD isn%'t known", decl);
6608 : 17 : TREE_TYPE (decl) = error_mark_node;
6609 : : }
6610 : : #if 0
6611 : : /* Keep this code around in case we later want to control debug info
6612 : : based on whether a type is "used". (jason 1999-11-11) */
6613 : :
6614 : : else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
6615 : : /* Let debugger know it should output info for this type. */
6616 : : note_debug_info_needed (ttype);
6617 : :
6618 : : if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
6619 : : note_debug_info_needed (DECL_CONTEXT (decl));
6620 : : #endif
6621 : :
6622 : 81514596 : if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
6623 : 22722098 : && DECL_SIZE (decl) != NULL_TREE
6624 : 67481933 : && ! TREE_CONSTANT (DECL_SIZE (decl)))
6625 : : {
6626 : 6 : if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST
6627 : 6 : && !DECL_LOCAL_DECL_P (decl))
6628 : 0 : constant_expression_warning (DECL_SIZE (decl));
6629 : : else
6630 : : {
6631 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
6632 : : "storage size of %qD isn%'t constant", decl);
6633 : 6 : TREE_TYPE (decl) = error_mark_node;
6634 : 6 : type = error_mark_node;
6635 : : }
6636 : : }
6637 : :
6638 : : /* If the final element initializes a flexible array field, adjust
6639 : : the size of the DECL with the initializer based on whether the
6640 : : DECL is a union or a structure. */
6641 : 44927484 : if (type != error_mark_node
6642 : 44927478 : && DECL_INITIAL (decl)
6643 : 22567664 : && TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR
6644 : 3587179 : && !vec_safe_is_empty (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)))
6645 : 2984703 : && DECL_SIZE (decl) != NULL_TREE
6646 : 2984703 : && TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST
6647 : 2984703 : && COMPLETE_TYPE_P (type)
6648 : 2984703 : && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST
6649 : 47912187 : && tree_int_cst_equal (DECL_SIZE (decl), TYPE_SIZE (type)))
6650 : : {
6651 : 2984703 : constructor_elt &elt = CONSTRUCTOR_ELTS (DECL_INITIAL (decl))->last ();
6652 : 2984703 : if (elt.index)
6653 : : {
6654 : 2782866 : tree itype = TREE_TYPE (elt.index);
6655 : 2782866 : tree vtype = TREE_TYPE (elt.value);
6656 : 2782866 : if (TREE_CODE (itype) == ARRAY_TYPE
6657 : 47744 : && TYPE_DOMAIN (itype) == NULL
6658 : 272 : && TREE_CODE (vtype) == ARRAY_TYPE
6659 : 2783138 : && COMPLETE_TYPE_P (vtype))
6660 : : {
6661 : : /* For a structure, add the size of the initializer to the DECL's
6662 : : size. */
6663 : 272 : if (TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE)
6664 : : {
6665 : 257 : DECL_SIZE (decl)
6666 : 257 : = size_binop (PLUS_EXPR, DECL_SIZE (decl),
6667 : : TYPE_SIZE (vtype));
6668 : 257 : DECL_SIZE_UNIT (decl)
6669 : 514 : = size_binop (PLUS_EXPR, DECL_SIZE_UNIT (decl),
6670 : : TYPE_SIZE_UNIT (vtype));
6671 : : }
6672 : : /* For a union, the DECL's size is the maximum of the current size
6673 : : and the size of the initializer. */
6674 : : else
6675 : : {
6676 : 15 : DECL_SIZE (decl)
6677 : 15 : = size_binop (MAX_EXPR, DECL_SIZE (decl),
6678 : : TYPE_SIZE (vtype));
6679 : 15 : DECL_SIZE_UNIT (decl)
6680 : 30 : = size_binop (MAX_EXPR, DECL_SIZE_UNIT (decl),
6681 : : TYPE_SIZE_UNIT (vtype));
6682 : : }
6683 : : }
6684 : : }
6685 : : }
6686 : : }
6687 : :
6688 : : /* If a local static variable is declared in an inline function, or if
6689 : : we have a weak definition, we must endeavor to create only one
6690 : : instance of the variable at link-time. */
6691 : :
6692 : : void
6693 : 50208334 : maybe_commonize_var (tree decl)
6694 : : {
6695 : : /* Don't mess with __FUNCTION__ and similar. But do handle structured
6696 : : bindings. */
6697 : 50208334 : if (DECL_ARTIFICIAL (decl) && !DECL_DECOMPOSITION_P (decl))
6698 : : return;
6699 : :
6700 : : /* Static data in a function with comdat linkage also has comdat
6701 : : linkage. */
6702 : 45424420 : if ((TREE_STATIC (decl)
6703 : 22861089 : && DECL_FUNCTION_SCOPE_P (decl)
6704 : 139205 : && vague_linkage_p (DECL_CONTEXT (decl)))
6705 : 91319459 : || (TREE_PUBLIC (decl) && DECL_INLINE_VAR_P (decl)))
6706 : : {
6707 : 18623228 : if (flag_weak)
6708 : : {
6709 : : /* With weak symbols, we simply make the variable COMDAT;
6710 : : that will cause copies in multiple translations units to
6711 : : be merged. */
6712 : 18623201 : comdat_linkage (decl);
6713 : : }
6714 : : else
6715 : : {
6716 : 27 : if (DECL_INITIAL (decl) == NULL_TREE
6717 : 27 : || DECL_INITIAL (decl) == error_mark_node)
6718 : : {
6719 : : /* Without weak symbols, we can use COMMON to merge
6720 : : uninitialized variables. */
6721 : 24 : TREE_PUBLIC (decl) = 1;
6722 : 24 : DECL_COMMON (decl) = 1;
6723 : : }
6724 : : else
6725 : : {
6726 : : /* While for initialized variables, we must use internal
6727 : : linkage -- which means that multiple copies will not
6728 : : be merged. */
6729 : 3 : TREE_PUBLIC (decl) = 0;
6730 : 3 : DECL_COMMON (decl) = 0;
6731 : 3 : DECL_INTERFACE_KNOWN (decl) = 1;
6732 : 3 : const char *msg;
6733 : 3 : if (DECL_INLINE_VAR_P (decl))
6734 : : msg = G_("sorry: semantics of inline variable "
6735 : : "%q#D are wrong (you%'ll wind up with "
6736 : : "multiple copies)");
6737 : : else
6738 : : msg = G_("sorry: semantics of inline function "
6739 : : "static data %q#D are wrong (you%'ll wind "
6740 : : "up with multiple copies)");
6741 : 3 : auto_diagnostic_group d;
6742 : 3 : if (warning_at (DECL_SOURCE_LOCATION (decl), 0,
6743 : : msg, decl))
6744 : 3 : inform (DECL_SOURCE_LOCATION (decl),
6745 : : "you can work around this by removing the initializer");
6746 : 3 : }
6747 : : }
6748 : : }
6749 : : }
6750 : :
6751 : : /* Issue an error message if DECL is an uninitialized const variable.
6752 : : CONSTEXPR_CONTEXT_P is true when the function is called in a constexpr
6753 : : context from potential_constant_expression. Returns true if all is well,
6754 : : false otherwise. */
6755 : :
6756 : : bool
6757 : 6151462 : check_for_uninitialized_const_var (tree decl, bool constexpr_context_p,
6758 : : tsubst_flags_t complain)
6759 : : {
6760 : 6151462 : tree type = strip_array_types (TREE_TYPE (decl));
6761 : :
6762 : : /* ``Unless explicitly declared extern, a const object does not have
6763 : : external linkage and must be initialized. ($8.4; $12.1)'' ARM
6764 : : 7.1.6 */
6765 : 6151462 : if (VAR_P (decl)
6766 : 6151462 : && !TYPE_REF_P (type)
6767 : 6129061 : && (CP_TYPE_CONST_P (type)
6768 : : /* C++20 permits trivial default initialization in constexpr
6769 : : context (P1331R2). */
6770 : 5080677 : || (cxx_dialect < cxx20
6771 : 2739462 : && (constexpr_context_p
6772 : 2445741 : || var_in_constexpr_fn (decl))))
6773 : 7604214 : && !DECL_NONTRIVIALLY_INITIALIZED_P (decl))
6774 : : {
6775 : 633357 : tree field = default_init_uninitialized_part (type);
6776 : 633357 : if (!field)
6777 : : return true;
6778 : :
6779 : 112478 : auto_diagnostic_group d;
6780 : 112478 : bool show_notes = true;
6781 : :
6782 : 112478 : if (!constexpr_context_p || cxx_dialect >= cxx20)
6783 : : {
6784 : 108736 : if (CP_TYPE_CONST_P (type))
6785 : : {
6786 : 90 : if (complain & tf_error)
6787 : 84 : show_notes = permerror (DECL_SOURCE_LOCATION (decl),
6788 : : "uninitialized %<const %D%>", decl);
6789 : : }
6790 : : else
6791 : : {
6792 : 108646 : if (!is_instantiation_of_constexpr (current_function_decl)
6793 : 108646 : && (complain & tf_error))
6794 : 21 : error_at (DECL_SOURCE_LOCATION (decl),
6795 : : "uninitialized variable %qD in %<constexpr%> "
6796 : : "function", decl);
6797 : : else
6798 : : show_notes = false;
6799 : 108646 : cp_function_chain->invalid_constexpr = true;
6800 : : }
6801 : : }
6802 : 3742 : else if (complain & tf_error)
6803 : 2 : error_at (DECL_SOURCE_LOCATION (decl),
6804 : : "uninitialized variable %qD in %<constexpr%> context",
6805 : : decl);
6806 : :
6807 : 112478 : if (show_notes && CLASS_TYPE_P (type) && (complain & tf_error))
6808 : : {
6809 : 62 : tree defaulted_ctor;
6810 : :
6811 : 62 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
6812 : : "%q#T has no user-provided default constructor", type);
6813 : 62 : defaulted_ctor = in_class_defaulted_default_constructor (type);
6814 : 62 : if (defaulted_ctor)
6815 : 33 : inform (DECL_SOURCE_LOCATION (defaulted_ctor),
6816 : : "constructor is not user-provided because it is "
6817 : : "explicitly defaulted in the class body");
6818 : 62 : inform (DECL_SOURCE_LOCATION (field),
6819 : : "and the implicitly-defined constructor does not "
6820 : : "initialize %q#D", field);
6821 : : }
6822 : :
6823 : 112478 : return false;
6824 : 112478 : }
6825 : :
6826 : : return true;
6827 : : }
6828 : :
6829 : : /* Structure holding the current initializer being processed by reshape_init.
6830 : : CUR is a pointer to the current element being processed, END is a pointer
6831 : : after the last element present in the initializer and RAW_IDX is index into
6832 : : RAW_DATA_CST if that is CUR elt. */
6833 : : struct reshape_iter
6834 : : {
6835 : : constructor_elt *cur;
6836 : : constructor_elt *end;
6837 : : unsigned raw_idx;
6838 : : };
6839 : :
6840 : : static tree reshape_init_r (tree, reshape_iter *, tree, tsubst_flags_t);
6841 : :
6842 : : /* FIELD is an element of TYPE_FIELDS or NULL. In the former case, the value
6843 : : returned is the next FIELD_DECL (possibly FIELD itself) that can be
6844 : : initialized as if for an aggregate class. If there are no more such fields,
6845 : : the return value will be NULL. */
6846 : :
6847 : : tree
6848 : 13304601 : next_aggregate_field (tree field)
6849 : : {
6850 : 13304601 : while (field
6851 : 46594798 : && (TREE_CODE (field) != FIELD_DECL
6852 : 8512929 : || DECL_UNNAMED_BIT_FIELD (field)
6853 : 8512807 : || (DECL_ARTIFICIAL (field)
6854 : : /* In C++17, aggregates can have bases. */
6855 : 70204 : && !(cxx_dialect >= cxx17 && DECL_FIELD_IS_BASE (field)))))
6856 : 33290197 : field = DECL_CHAIN (field);
6857 : :
6858 : 13304601 : return field;
6859 : : }
6860 : :
6861 : : /* FIELD is an element of TYPE_FIELDS or NULL. In the former case, the value
6862 : : returned is the next FIELD_DECL (possibly FIELD itself) that corresponds
6863 : : to a subobject. If there are no more such fields, the return value will be
6864 : : NULL. */
6865 : :
6866 : : tree
6867 : 51968130 : next_subobject_field (tree field)
6868 : : {
6869 : 51968130 : while (field
6870 : 624856839 : && (TREE_CODE (field) != FIELD_DECL
6871 : 23708186 : || DECL_UNNAMED_BIT_FIELD (field)
6872 : 23708106 : || (DECL_ARTIFICIAL (field)
6873 : 6592884 : && !DECL_FIELD_IS_BASE (field)
6874 : 1663495 : && !DECL_VIRTUAL_P (field))))
6875 : 572888709 : field = DECL_CHAIN (field);
6876 : :
6877 : 51968130 : return field;
6878 : : }
6879 : :
6880 : : /* Return true for [dcl.init.list] direct-list-initialization from
6881 : : single element of enumeration with a fixed underlying type. */
6882 : :
6883 : : bool
6884 : 118003011 : is_direct_enum_init (tree type, tree init)
6885 : : {
6886 : 118003011 : if (cxx_dialect >= cxx17
6887 : 116090753 : && TREE_CODE (type) == ENUMERAL_TYPE
6888 : 5788922 : && ENUM_FIXED_UNDERLYING_TYPE_P (type)
6889 : 3335465 : && TREE_CODE (init) == CONSTRUCTOR
6890 : 391566 : && CONSTRUCTOR_IS_DIRECT_INIT (init)
6891 : 195161 : && CONSTRUCTOR_NELTS (init) == 1
6892 : 218 : && TREE_CODE (CONSTRUCTOR_ELT (init, 0)->value) != RAW_DATA_CST
6893 : : /* DR 2374: The single element needs to be implicitly
6894 : : convertible to the underlying type of the enum. */
6895 : 218 : && !type_dependent_expression_p (CONSTRUCTOR_ELT (init, 0)->value)
6896 : 118003227 : && can_convert_arg (ENUM_UNDERLYING_TYPE (type),
6897 : 216 : TREE_TYPE (CONSTRUCTOR_ELT (init, 0)->value),
6898 : 216 : CONSTRUCTOR_ELT (init, 0)->value,
6899 : : LOOKUP_IMPLICIT, tf_none))
6900 : : return true;
6901 : : return false;
6902 : : }
6903 : :
6904 : : /* Helper function for reshape_init*. Split first element of
6905 : : RAW_DATA_CST or return NULL for other elements. Set *INC_CUR
6906 : : to true if the whole d->cur has been consumed. */
6907 : :
6908 : : static tree
6909 : 21194209 : cp_maybe_split_raw_data (reshape_iter *d, bool *inc_cur)
6910 : : {
6911 : 21194209 : *inc_cur = true;
6912 : 21194209 : if (TREE_CODE (d->cur->value) != RAW_DATA_CST)
6913 : : return NULL_TREE;
6914 : 30720 : tree ret = *raw_data_iterator (d->cur->value, d->raw_idx++);
6915 : 30720 : if (d->raw_idx != (unsigned) RAW_DATA_LENGTH (d->cur->value))
6916 : 30588 : *inc_cur = false;
6917 : : else
6918 : 132 : d->raw_idx = 0;
6919 : : return ret;
6920 : : }
6921 : :
6922 : : /* Wrapper around that which for RAW_DATA_CST in INIT
6923 : : (as well as in D->cur->value) peels off the first element
6924 : : of the raw data and returns it, otherwise increments
6925 : : D->cur and returns INIT. */
6926 : :
6927 : : static tree
6928 : 21194193 : consume_init (tree init, reshape_iter *d)
6929 : : {
6930 : 21194193 : bool inc_cur;
6931 : 21194193 : if (tree raw_init = cp_maybe_split_raw_data (d, &inc_cur))
6932 : 30720 : init = raw_init;
6933 : 21194193 : if (inc_cur)
6934 : 21163605 : d->cur++;
6935 : 21194193 : return init;
6936 : : }
6937 : :
6938 : : /* Subroutine of reshape_init_array and reshape_init_vector, which does
6939 : : the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
6940 : : INTEGER_CST representing the size of the array minus one (the maximum index),
6941 : : or NULL_TREE if the array was declared without specifying the size. D is
6942 : : the iterator within the constructor. */
6943 : :
6944 : : static tree
6945 : 346125 : reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d,
6946 : : tree first_initializer_p, bool vector_p,
6947 : : tsubst_flags_t complain)
6948 : : {
6949 : 346125 : tree new_init;
6950 : 346125 : bool sized_array_p = (max_index && TREE_CONSTANT (max_index));
6951 : 346125 : unsigned HOST_WIDE_INT max_index_cst = 0;
6952 : 346125 : unsigned HOST_WIDE_INT index;
6953 : :
6954 : : /* The initializer for an array is always a CONSTRUCTOR. If this is the
6955 : : outermost CONSTRUCTOR and the element type is non-aggregate, we don't need
6956 : : to build a new one. But don't reuse if not complaining; if this is
6957 : : tentative, we might also reshape to another type (95319). */
6958 : 346125 : bool reuse = (first_initializer_p
6959 : 300871 : && (complain & tf_error)
6960 : 299625 : && !CP_AGGREGATE_TYPE_P (elt_type)
6961 : 598527 : && !TREE_SIDE_EFFECTS (first_initializer_p));
6962 : 99962 : if (reuse)
6963 : : new_init = first_initializer_p;
6964 : : else
6965 : 99962 : new_init = build_constructor (init_list_type_node, NULL);
6966 : :
6967 : 346125 : if (sized_array_p)
6968 : : {
6969 : 240689 : poly_uint64 midx;
6970 : : /* Minus 1 is used for zero sized arrays. */
6971 : 240689 : if (integer_all_onesp (max_index))
6972 : 24 : return new_init;
6973 : :
6974 : 240665 : if (tree_fits_poly_uint64_p (max_index))
6975 : 240665 : midx = tree_to_poly_uint64 (max_index);
6976 : : /* sizetype is sign extended, not zero extended. */
6977 : : else
6978 : 0 : midx = tree_to_poly_uint64 (fold_convert (size_type_node, max_index));
6979 : :
6980 : : /* For VLA vectors, we restict the number of elements in the constructor
6981 : : to lower bound of the VLA elements. */
6982 : 240665 : max_index_cst = constant_lower_bound (midx);
6983 : : }
6984 : :
6985 : 346101 : constructor_elt *first_cur = d->cur;
6986 : : /* Loop until there are no more initializers. */
6987 : 16396810 : for (index = 0;
6988 : 16396810 : d->cur != d->end && (!sized_array_p || index <= max_index_cst);
6989 : : ++index)
6990 : : {
6991 : 16050891 : tree elt_init;
6992 : 16050891 : constructor_elt *old_cur = d->cur;
6993 : 16050891 : unsigned int old_raw_idx = d->raw_idx;
6994 : 16050891 : bool old_raw_data_cst = TREE_CODE (d->cur->value) == RAW_DATA_CST;
6995 : :
6996 : 16050891 : if (d->cur->index)
6997 : 1412160 : CONSTRUCTOR_IS_DESIGNATED_INIT (new_init) = true;
6998 : 16050891 : check_array_designated_initializer (d->cur, index);
6999 : 16050891 : if (TREE_CODE (d->cur->value) == RAW_DATA_CST
7000 : 32693 : && (TREE_CODE (elt_type) == INTEGER_TYPE
7001 : 10233 : || is_byte_access_type (elt_type))
7002 : 22460 : && TYPE_PRECISION (elt_type) == CHAR_BIT
7003 : 1799 : && (!sized_array_p || index < max_index_cst)
7004 : 16052678 : && !vector_p)
7005 : : {
7006 : 467 : elt_init = d->cur->value;
7007 : 467 : unsigned int off = d->raw_idx;
7008 : 467 : unsigned int len = RAW_DATA_LENGTH (elt_init) - off;
7009 : 467 : if (!sized_array_p || len <= max_index_cst - index + 1)
7010 : : {
7011 : 458 : d->cur++;
7012 : 458 : d->raw_idx = 0;
7013 : : }
7014 : : else
7015 : : {
7016 : 9 : len = max_index_cst - index + 1;
7017 : 9 : d->raw_idx += len;
7018 : : }
7019 : 467 : if (!reuse || off || d->cur == old_cur)
7020 : : {
7021 : 25 : elt_init = copy_node (elt_init);
7022 : 25 : RAW_DATA_LENGTH (elt_init) = len;
7023 : 25 : RAW_DATA_POINTER (elt_init) += off;
7024 : : }
7025 : 467 : TREE_TYPE (elt_init) = elt_type;
7026 : : }
7027 : : else
7028 : 16050424 : elt_init = reshape_init_r (elt_type, d,
7029 : : /*first_initializer_p=*/NULL_TREE,
7030 : : complain);
7031 : 16050891 : if (elt_init == error_mark_node)
7032 : : return error_mark_node;
7033 : 16050712 : tree idx = size_int (index);
7034 : 16050712 : if (reuse && old_raw_data_cst && d->cur == old_cur)
7035 : : {
7036 : : /* We need to stop reusing as some RAW_DATA_CST in the original
7037 : : ctor had to be split. */
7038 : 72 : new_init = build_constructor (init_list_type_node, NULL);
7039 : 72 : if (index)
7040 : : {
7041 : 72 : vec_safe_grow (CONSTRUCTOR_ELTS (new_init), index);
7042 : 72 : memcpy (CONSTRUCTOR_ELT (new_init, 0), first_cur,
7043 : 72 : (d->cur - first_cur)
7044 : : * sizeof (*CONSTRUCTOR_ELT (new_init, 0)));
7045 : 72 : if (CONSTRUCTOR_IS_DESIGNATED_INIT (first_initializer_p))
7046 : : {
7047 : : unsigned int j;
7048 : : tree nidx, nval;
7049 : 4 : FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (new_init),
7050 : : j, nidx, nval)
7051 : 4 : if (nidx)
7052 : : {
7053 : 4 : CONSTRUCTOR_IS_DESIGNATED_INIT (new_init) = 1;
7054 : 4 : (void) nval;
7055 : 4 : break;
7056 : : }
7057 : : }
7058 : : }
7059 : : reuse = false;
7060 : : }
7061 : 16050640 : if (reuse)
7062 : : {
7063 : 14426873 : old_cur->index = idx;
7064 : 14426873 : old_cur->value = elt_init;
7065 : : }
7066 : : else
7067 : 1623839 : CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
7068 : : idx, elt_init);
7069 : 16050712 : if (!TREE_CONSTANT (elt_init))
7070 : 155937 : TREE_CONSTANT (new_init) = false;
7071 : :
7072 : : /* This can happen with an invalid initializer (c++/54501). */
7073 : 16050712 : if (d->cur == old_cur
7074 : 32082 : && !sized_array_p
7075 : 14085 : && d->raw_idx == old_raw_idx)
7076 : : break;
7077 : :
7078 : 16050709 : if (TREE_CODE (elt_init) == RAW_DATA_CST)
7079 : 467 : index += RAW_DATA_LENGTH (elt_init) - 1;
7080 : : }
7081 : :
7082 : : return new_init;
7083 : : }
7084 : :
7085 : : /* Subroutine of reshape_init_r, processes the initializers for arrays.
7086 : : Parameters are the same of reshape_init_r. */
7087 : :
7088 : : static tree
7089 : 305312 : reshape_init_array (tree type, reshape_iter *d, tree first_initializer_p,
7090 : : tsubst_flags_t complain)
7091 : : {
7092 : 305312 : tree max_index = NULL_TREE;
7093 : :
7094 : 305312 : gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
7095 : :
7096 : 305312 : if (TYPE_DOMAIN (type))
7097 : 199921 : max_index = array_type_nelts_minus_one (type);
7098 : :
7099 : 305312 : return reshape_init_array_1 (TREE_TYPE (type), max_index, d,
7100 : 305312 : first_initializer_p, false, complain);
7101 : : }
7102 : :
7103 : : /* Subroutine of reshape_init_r, processes the initializers for vectors.
7104 : : Parameters are the same of reshape_init_r. */
7105 : :
7106 : : static tree
7107 : 40813 : reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
7108 : : {
7109 : 40813 : tree max_index = NULL_TREE;
7110 : :
7111 : 40813 : gcc_assert (VECTOR_TYPE_P (type));
7112 : :
7113 : 40813 : if (COMPOUND_LITERAL_P (d->cur->value))
7114 : : {
7115 : 0 : tree value = d->cur->value;
7116 : 0 : if (!same_type_p (TREE_TYPE (value), type))
7117 : : {
7118 : 0 : if (complain & tf_error)
7119 : 0 : error ("invalid type %qT as initializer for a vector of type %qT",
7120 : 0 : TREE_TYPE (d->cur->value), type);
7121 : 0 : value = error_mark_node;
7122 : : }
7123 : 0 : ++d->cur;
7124 : 0 : return value;
7125 : : }
7126 : :
7127 : : /* For a vector, we initialize it as an array of the appropriate size. */
7128 : 40813 : if (VECTOR_TYPE_P (type))
7129 : 40813 : max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
7130 : :
7131 : 40813 : return reshape_init_array_1 (TREE_TYPE (type), max_index, d,
7132 : 40813 : NULL_TREE, true, complain);
7133 : : }
7134 : :
7135 : : /* Subroutine of reshape_init*: We're initializing an element with TYPE from
7136 : : INIT, in isolation from any designator or other initializers. */
7137 : :
7138 : : static tree
7139 : 543406 : reshape_single_init (tree type, tree init, tsubst_flags_t complain)
7140 : : {
7141 : : /* We could also implement this by wrapping init in a new CONSTRUCTOR and
7142 : : calling reshape_init, but this way can just live on the stack. */
7143 : 543406 : constructor_elt elt = { /*index=*/NULL_TREE, init };
7144 : 543406 : reshape_iter iter = { &elt, &elt + 1, 0 };
7145 : 543406 : return reshape_init_r (type, &iter,
7146 : : /*first_initializer_p=*/NULL_TREE,
7147 : 543406 : complain);
7148 : : }
7149 : :
7150 : : /* Subroutine of reshape_init_r, processes the initializers for classes
7151 : : or union. Parameters are the same of reshape_init_r. */
7152 : :
7153 : : static tree
7154 : 3361214 : reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
7155 : : tsubst_flags_t complain)
7156 : : {
7157 : 3361214 : tree field;
7158 : 3361214 : tree new_init;
7159 : :
7160 : 3361214 : gcc_assert (CLASS_TYPE_P (type));
7161 : :
7162 : : /* The initializer for a class is always a CONSTRUCTOR. */
7163 : 3361214 : new_init = build_constructor (init_list_type_node, NULL);
7164 : :
7165 : 3361214 : int binfo_idx = -1;
7166 : 3361214 : tree binfo = TYPE_BINFO (type);
7167 : 3361214 : tree base_binfo = NULL_TREE;
7168 : 3361214 : if (cxx_dialect >= cxx17 && uses_template_parms (type))
7169 : : {
7170 : : /* We get here from maybe_aggr_guide for C++20 class template argument
7171 : : deduction. In this case we need to look through the binfo because a
7172 : : template doesn't have base fields. */
7173 : 333 : binfo_idx = 0;
7174 : 333 : BINFO_BASE_ITERATE (binfo, binfo_idx, base_binfo);
7175 : : }
7176 : 67 : if (base_binfo)
7177 : : field = base_binfo;
7178 : : else
7179 : 3361147 : field = next_aggregate_field (TYPE_FIELDS (type));
7180 : :
7181 : 3361214 : if (!field)
7182 : : {
7183 : : /* [dcl.init.aggr]
7184 : :
7185 : : An initializer for an aggregate member that is an
7186 : : empty class shall have the form of an empty
7187 : : initializer-list {}. */
7188 : 324 : if (!first_initializer_p)
7189 : : {
7190 : 270 : if (complain & tf_error)
7191 : 13 : error ("initializer for %qT must be brace-enclosed", type);
7192 : 270 : return error_mark_node;
7193 : : }
7194 : : return new_init;
7195 : : }
7196 : :
7197 : : /* For C++20 CTAD, handle pack expansions in the base list. */
7198 : : tree last_was_pack_expansion = NULL_TREE;
7199 : :
7200 : : /* Loop through the initializable fields, gathering initializers. */
7201 : 10247440 : while (d->cur != d->end)
7202 : : {
7203 : 6995379 : tree field_init;
7204 : 6995379 : constructor_elt *old_cur = d->cur;
7205 : 6995379 : unsigned old_raw_idx = d->raw_idx;
7206 : 6995379 : bool direct_desig = false;
7207 : :
7208 : : /* Handle C++20 designated initializers. */
7209 : 6995379 : if (d->cur->index)
7210 : : {
7211 : 543566 : if (d->cur->index == error_mark_node)
7212 : : return error_mark_node;
7213 : :
7214 : 543560 : if (TREE_CODE (d->cur->index) == FIELD_DECL)
7215 : : {
7216 : : /* We already reshaped this; we should have returned early from
7217 : : reshape_init. */
7218 : 0 : gcc_checking_assert (false);
7219 : : if (field != d->cur->index)
7220 : : {
7221 : : if (tree id = DECL_NAME (d->cur->index))
7222 : : gcc_checking_assert (d->cur->index
7223 : : == get_class_binding (type, id));
7224 : : field = d->cur->index;
7225 : : }
7226 : : }
7227 : 543560 : else if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
7228 : : {
7229 : 543554 : CONSTRUCTOR_IS_DESIGNATED_INIT (new_init) = true;
7230 : 543554 : field = get_class_binding (type, d->cur->index);
7231 : 543554 : direct_desig = true;
7232 : : }
7233 : : else
7234 : : {
7235 : 6 : if (complain & tf_error)
7236 : 6 : error ("%<[%E] =%> used in a GNU-style designated initializer"
7237 : : " for class %qT", d->cur->index, type);
7238 : 6 : return error_mark_node;
7239 : : }
7240 : :
7241 : 543554 : if (!field && ANON_AGGR_TYPE_P (type))
7242 : : /* Apparently the designator isn't for a member of this anonymous
7243 : : struct, so head back to the enclosing class. */
7244 : : break;
7245 : :
7246 : 543551 : if (!field || TREE_CODE (field) != FIELD_DECL)
7247 : : {
7248 : 18 : if (complain & tf_error)
7249 : : {
7250 : 6 : if (field && TREE_CODE (field) == TREE_LIST)
7251 : : {
7252 : 3 : auto_diagnostic_group g;
7253 : 3 : error ("request for member %qD is ambiguous",
7254 : 3 : d->cur->index);
7255 : 3 : print_candidates (field);
7256 : 3 : }
7257 : : else
7258 : 3 : error ("%qT has no non-static data member named %qD", type,
7259 : 3 : d->cur->index);
7260 : : }
7261 : 18 : return error_mark_node;
7262 : : }
7263 : :
7264 : : /* If the element is an anonymous union object and the initializer
7265 : : list is a designated-initializer-list, the anonymous union object
7266 : : is initialized by the designated-initializer-list { D }, where D
7267 : : is the designated-initializer-clause naming a member of the
7268 : : anonymous union object. */
7269 : 543533 : tree ictx = DECL_CONTEXT (field);
7270 : 543533 : if (!same_type_ignoring_top_level_qualifiers_p (ictx, type))
7271 : : {
7272 : : /* Find the anon aggr that is a direct member of TYPE. */
7273 : 139 : while (ANON_AGGR_TYPE_P (ictx))
7274 : : {
7275 : 136 : tree cctx = TYPE_CONTEXT (ictx);
7276 : 136 : if (same_type_ignoring_top_level_qualifiers_p (cctx, type))
7277 : 124 : goto found;
7278 : : ictx = cctx;
7279 : : }
7280 : :
7281 : : /* Not found, e.g. FIELD is a member of a base class. */
7282 : 3 : if (complain & tf_error)
7283 : 3 : error ("%qD is not a direct member of %qT", field, type);
7284 : 3 : return error_mark_node;
7285 : :
7286 : 124 : found:
7287 : : /* Now find the TYPE member with that anon aggr type. */
7288 : 124 : tree aafield = TYPE_FIELDS (type);
7289 : 1067 : for (; aafield; aafield = TREE_CHAIN (aafield))
7290 : 1067 : if (TREE_TYPE (aafield) == ictx)
7291 : : break;
7292 : 0 : gcc_assert (aafield);
7293 : : field = aafield;
7294 : : direct_desig = false;
7295 : : }
7296 : : }
7297 : :
7298 : : /* If we processed all the member of the class, we are done. */
7299 : 6995219 : if (!field)
7300 : : break;
7301 : :
7302 : 13989885 : last_was_pack_expansion = (PACK_EXPANSION_P (TREE_TYPE (field))
7303 : 6994952 : ? field : NULL_TREE);
7304 : 6994952 : if (last_was_pack_expansion)
7305 : : /* Each non-trailing aggregate element that is a pack expansion is
7306 : : assumed to correspond to no elements of the initializer list. */
7307 : 19 : goto continue_;
7308 : :
7309 : 6994933 : if (direct_desig)
7310 : : {
7311 : : /* The designated field F is initialized from this one element.
7312 : :
7313 : : Note that we don't want to do this if we found the designator
7314 : : inside an anon aggr above; we use the normal code to implement:
7315 : :
7316 : : "If the element is an anonymous union member and the initializer
7317 : : list is a brace-enclosed designated- initializer-list, the element
7318 : : is initialized by the designated-initializer-list { D }, where D
7319 : : is the designated- initializer-clause naming a member of the
7320 : : anonymous union member." */
7321 : 543406 : gcc_checking_assert (TREE_CODE (d->cur->value) != RAW_DATA_CST);
7322 : 543406 : field_init = reshape_single_init (TREE_TYPE (field),
7323 : : d->cur->value, complain);
7324 : 543406 : d->cur++;
7325 : : }
7326 : : else
7327 : 6451527 : field_init = reshape_init_r (TREE_TYPE (field), d,
7328 : : /*first_initializer_p=*/NULL_TREE,
7329 : : complain);
7330 : :
7331 : 6994933 : if (field_init == error_mark_node)
7332 : : return error_mark_node;
7333 : :
7334 : 6994644 : if (d->cur == old_cur && d->cur->index && d->raw_idx == old_raw_idx)
7335 : : {
7336 : : /* This can happen with an invalid initializer for a flexible
7337 : : array member (c++/54441). */
7338 : 0 : if (complain & tf_error)
7339 : 0 : error ("invalid initializer for %q#D", field);
7340 : 0 : return error_mark_node;
7341 : : }
7342 : :
7343 : 6994644 : CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
7344 : :
7345 : : /* [dcl.init.aggr]
7346 : :
7347 : : When a union is initialized with a brace-enclosed
7348 : : initializer, the braces shall only contain an
7349 : : initializer for the first member of the union. */
7350 : 6994644 : if (TREE_CODE (type) == UNION_TYPE)
7351 : : break;
7352 : :
7353 : 6886531 : continue_:
7354 : 6886550 : if (base_binfo)
7355 : : {
7356 : 82 : if (BINFO_BASE_ITERATE (binfo, ++binfo_idx, base_binfo))
7357 : : field = base_binfo;
7358 : : else
7359 : 35 : field = next_aggregate_field (TYPE_FIELDS (type));
7360 : : }
7361 : : else
7362 : 6886468 : field = next_aggregate_field (DECL_CHAIN (field));
7363 : : }
7364 : :
7365 : : /* A trailing aggregate element that is a pack expansion is assumed to
7366 : : correspond to all remaining elements of the initializer list (if any). */
7367 : 3360568 : if (last_was_pack_expansion)
7368 : : {
7369 : 16 : tree init = d->cur->value;
7370 : 16 : bool inc_cur;
7371 : 16 : if (tree raw_init = cp_maybe_split_raw_data (d, &inc_cur))
7372 : 0 : init = raw_init;
7373 : 16 : CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
7374 : : last_was_pack_expansion, init);
7375 : 46 : while (d->cur != d->end)
7376 : 30 : d->cur++;
7377 : : }
7378 : :
7379 : : return new_init;
7380 : : }
7381 : :
7382 : : /* Subroutine of reshape_init_r. We're in a context where C99 initializer
7383 : : designators are not valid; either complain or return true to indicate
7384 : : that reshape_init_r should return error_mark_node. */
7385 : :
7386 : : static bool
7387 : 57556 : has_designator_problem (reshape_iter *d, tsubst_flags_t complain)
7388 : : {
7389 : 57556 : if (d->cur->index)
7390 : : {
7391 : 30 : if (complain & tf_error)
7392 : 45 : error_at (cp_expr_loc_or_input_loc (d->cur->index),
7393 : : "C99 designator %qE outside aggregate initializer",
7394 : : d->cur->index);
7395 : : else
7396 : : return true;
7397 : : }
7398 : : return false;
7399 : : }
7400 : :
7401 : : /* Subroutine of reshape_init, which processes a single initializer (part of
7402 : : a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
7403 : : iterator within the CONSTRUCTOR which points to the initializer to process.
7404 : : If this is the first initializer of the outermost CONSTRUCTOR node,
7405 : : FIRST_INITIALIZER_P is that CONSTRUCTOR; otherwise, it is NULL_TREE. */
7406 : :
7407 : : static tree
7408 : 26804866 : reshape_init_r (tree type, reshape_iter *d, tree first_initializer_p,
7409 : : tsubst_flags_t complain)
7410 : : {
7411 : 26804866 : tree init = d->cur->value;
7412 : :
7413 : 26804866 : if (error_operand_p (init))
7414 : 116 : return error_mark_node;
7415 : :
7416 : 3759396 : if (first_initializer_p && !CP_AGGREGATE_TYPE_P (type)
7417 : 26862140 : && has_designator_problem (d, complain))
7418 : 0 : return error_mark_node;
7419 : :
7420 : 26804750 : tree stripped_init = tree_strip_any_location_wrapper (init);
7421 : :
7422 : 26804750 : if (TREE_CODE (type) == COMPLEX_TYPE)
7423 : : {
7424 : : /* A complex type can be initialized from one or two initializers,
7425 : : but braces are not elided. */
7426 : 558 : init = consume_init (init, d);
7427 : 558 : if (BRACE_ENCLOSED_INITIALIZER_P (stripped_init))
7428 : : {
7429 : 9 : if (CONSTRUCTOR_NELTS (stripped_init) > 2)
7430 : : {
7431 : 0 : if (complain & tf_error)
7432 : 0 : error ("too many initializers for %qT", type);
7433 : : else
7434 : 0 : return error_mark_node;
7435 : : }
7436 : : }
7437 : 549 : else if (first_initializer_p && d->cur != d->end)
7438 : : {
7439 : 36 : if (error_operand_p (d->cur->value)
7440 : 36 : || has_designator_problem (d, complain))
7441 : 0 : return error_mark_node;
7442 : 36 : vec<constructor_elt, va_gc> *v = 0;
7443 : 36 : CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
7444 : 36 : init = consume_init (d->cur->value, d);
7445 : 36 : CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
7446 : 36 : init = build_constructor (init_list_type_node, v);
7447 : : }
7448 : 558 : return init;
7449 : : }
7450 : :
7451 : : /* A non-aggregate type is always initialized with a single
7452 : : initializer. */
7453 : 53558893 : if (!CP_AGGREGATE_TYPE_P (type)
7454 : : /* As is an array with dependent bound, which we can see
7455 : : during C++20 aggregate CTAD. */
7456 : 32368577 : || (cxx_dialect >= cxx20
7457 : 3454960 : && TREE_CODE (type) == ARRAY_TYPE
7458 : 141996 : && uses_template_parms (TYPE_DOMAIN (type))))
7459 : : {
7460 : : /* It is invalid to initialize a non-aggregate type with a
7461 : : brace-enclosed initializer before C++0x.
7462 : : We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
7463 : : of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
7464 : : a CONSTRUCTOR (with a record type). */
7465 : 21190327 : if (TREE_CODE (stripped_init) == CONSTRUCTOR
7466 : : /* Don't complain about a capture-init. */
7467 : 299688 : && !CONSTRUCTOR_IS_DIRECT_INIT (stripped_init)
7468 : 21480255 : && BRACE_ENCLOSED_INITIALIZER_P (stripped_init)) /* p7626.C */
7469 : : {
7470 : 289889 : if (SCALAR_TYPE_P (type))
7471 : : {
7472 : 726 : if (cxx_dialect < cxx11)
7473 : : {
7474 : 16 : if (complain & tf_error)
7475 : 16 : error ("braces around scalar initializer for type %qT",
7476 : : type);
7477 : 16 : init = error_mark_node;
7478 : : }
7479 : 710 : else if (first_initializer_p
7480 : 710 : || (CONSTRUCTOR_NELTS (stripped_init) > 0
7481 : 546 : && (BRACE_ENCLOSED_INITIALIZER_P
7482 : : (CONSTRUCTOR_ELT (stripped_init,0)->value))))
7483 : : {
7484 : 13 : if (complain & tf_error)
7485 : 13 : error ("too many braces around scalar initializer "
7486 : : "for type %qT", type);
7487 : 13 : init = error_mark_node;
7488 : : }
7489 : : }
7490 : : else
7491 : 289163 : maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
7492 : : }
7493 : 21190327 : return consume_init (init, d);
7494 : : }
7495 : :
7496 : : /* "If T is a class type and the initializer list has a single element of
7497 : : type cv U, where U is T or a class derived from T, the object is
7498 : : initialized from that element." Even if T is an aggregate. */
7499 : 5591867 : if (cxx_dialect >= cxx11 && (CLASS_TYPE_P (type) || VECTOR_TYPE_P (type))
7500 : 5182676 : && first_initializer_p
7501 : : /* But not if it's a designated init. */
7502 : 3388407 : && !d->cur->index
7503 : 3157630 : && d->end - d->cur == 1
7504 : 403377 : && TREE_CODE (init) != RAW_DATA_CST
7505 : 6017242 : && reference_related_p (type, TREE_TYPE (init)))
7506 : : {
7507 : 413 : d->cur++;
7508 : 413 : return init;
7509 : : }
7510 : :
7511 : : /* [dcl.init.aggr]
7512 : :
7513 : : All implicit type conversions (clause _conv_) are considered when
7514 : : initializing the aggregate member with an initializer from an
7515 : : initializer-list. If the initializer can initialize a member,
7516 : : the member is initialized. Otherwise, if the member is itself a
7517 : : non-empty subaggregate, brace elision is assumed and the
7518 : : initializer is considered for the initialization of the first
7519 : : member of the subaggregate. */
7520 : 2444479 : if ((TREE_CODE (init) != CONSTRUCTOR || COMPOUND_LITERAL_P (init))
7521 : : /* But don't try this for the first initializer, since that would be
7522 : : looking through the outermost braces; A a2 = { a1 }; is not a
7523 : : valid aggregate initialization. */
7524 : 3169033 : && !first_initializer_p
7525 : 5623341 : && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
7526 : 6655 : || can_convert_arg (type, TREE_TYPE (init),
7527 : 6655 : TREE_CODE (init) == RAW_DATA_CST
7528 : 1606 : ? build_int_cst (integer_type_node,
7529 : : *(const unsigned char *)
7530 : 1606 : RAW_DATA_POINTER (init))
7531 : : : init,
7532 : : LOOKUP_NORMAL, complain)))
7533 : 3272 : return consume_init (init, d);
7534 : :
7535 : : /* [dcl.init.string]
7536 : :
7537 : : A char array (whether plain char, signed char, or unsigned char)
7538 : : can be initialized by a string-literal (optionally enclosed in
7539 : : braces); a wchar_t array can be initialized by a wide
7540 : : string-literal (optionally enclosed in braces). */
7541 : 5610180 : if (TREE_CODE (type) == ARRAY_TYPE
7542 : 5610180 : && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
7543 : : {
7544 : 85250 : tree str_init = init;
7545 : 85250 : tree stripped_str_init = stripped_init;
7546 : 85250 : reshape_iter stripd = {};
7547 : :
7548 : : /* Strip one level of braces if and only if they enclose a single
7549 : : element (as allowed by [dcl.init.string]). */
7550 : 85250 : if (!first_initializer_p
7551 : 12100 : && TREE_CODE (stripped_str_init) == CONSTRUCTOR
7552 : 96267 : && CONSTRUCTOR_NELTS (stripped_str_init) == 1)
7553 : : {
7554 : 375 : stripd.cur = CONSTRUCTOR_ELT (stripped_str_init, 0);
7555 : 375 : str_init = stripd.cur->value;
7556 : 375 : stripped_str_init = tree_strip_any_location_wrapper (str_init);
7557 : : }
7558 : :
7559 : : /* If it's a string literal, then it's the initializer for the array
7560 : : as a whole. Otherwise, continue with normal initialization for
7561 : : array types (one value per array element). */
7562 : 85250 : if (TREE_CODE (stripped_str_init) == STRING_CST)
7563 : : {
7564 : 72 : if ((first_initializer_p && has_designator_problem (d, complain))
7565 : 1025 : || (stripd.cur && has_designator_problem (&stripd, complain)))
7566 : 953 : return error_mark_node;
7567 : 953 : d->cur++;
7568 : 953 : return str_init;
7569 : : }
7570 : : }
7571 : :
7572 : : /* The following cases are about aggregates. If we are not within a full
7573 : : initializer already, and there is not a CONSTRUCTOR, it means that there
7574 : : is a missing set of braces (that is, we are processing the case for
7575 : : which reshape_init exists). */
7576 : 5609227 : bool braces_elided_p = false;
7577 : 5609227 : if (!first_initializer_p)
7578 : : {
7579 : 1907706 : if (TREE_CODE (stripped_init) == CONSTRUCTOR)
7580 : : {
7581 : 1901918 : tree init_type = TREE_TYPE (init);
7582 : 1901918 : if (init_type && TYPE_PTRMEMFUNC_P (init_type))
7583 : : /* There is no need to call reshape_init for pointer-to-member
7584 : : function initializers, as they are always constructed correctly
7585 : : by the front end. Here we have e.g. {.__pfn=0B, .__delta=0},
7586 : : which is missing outermost braces. We should warn below, and
7587 : : one of the routines below will wrap it in additional { }. */;
7588 : : /* For a nested compound literal, proceed to specialized routines,
7589 : : to handle initialization of arrays and similar. */
7590 : 1901909 : else if (COMPOUND_LITERAL_P (stripped_init))
7591 : 6 : gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (stripped_init));
7592 : : /* If we have an unresolved designator, we need to find the member it
7593 : : designates within TYPE, so proceed to the routines below. For
7594 : : FIELD_DECL or INTEGER_CST designators, we're already initializing
7595 : : the designated element. */
7596 : 1901903 : else if (d->cur->index
7597 : 27 : && TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
7598 : : /* Brace elision with designators is only permitted for anonymous
7599 : : aggregates. */
7600 : 15 : gcc_checking_assert (ANON_AGGR_TYPE_P (type));
7601 : : /* A CONSTRUCTOR of the target's type is a previously
7602 : : digested initializer. */
7603 : 1901888 : else if (same_type_ignoring_top_level_qualifiers_p (type, init_type))
7604 : : {
7605 : 0 : ++d->cur;
7606 : 0 : return init;
7607 : : }
7608 : : else
7609 : : {
7610 : : /* Something that hasn't been reshaped yet. */
7611 : 1901888 : ++d->cur;
7612 : 1901888 : gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (stripped_init));
7613 : 1901888 : return reshape_init (type, init, complain);
7614 : : }
7615 : : }
7616 : :
7617 : 5818 : if (complain & tf_warning)
7618 : 4669 : warning (OPT_Wmissing_braces,
7619 : : "missing braces around initializer for %qT",
7620 : : type);
7621 : : braces_elided_p = true;
7622 : : }
7623 : :
7624 : : /* Dispatch to specialized routines. */
7625 : 3707339 : tree new_init;
7626 : 3707339 : if (CLASS_TYPE_P (type))
7627 : 3361214 : new_init = reshape_init_class (type, d, first_initializer_p, complain);
7628 : 346125 : else if (TREE_CODE (type) == ARRAY_TYPE)
7629 : 305312 : new_init = reshape_init_array (type, d, first_initializer_p, complain);
7630 : 40813 : else if (VECTOR_TYPE_P (type))
7631 : 40813 : new_init = reshape_init_vector (type, d, complain);
7632 : : else
7633 : 0 : gcc_unreachable ();
7634 : :
7635 : 3707339 : if (braces_elided_p
7636 : 5818 : && TREE_CODE (new_init) == CONSTRUCTOR)
7637 : 5542 : CONSTRUCTOR_BRACES_ELIDED_P (new_init) = true;
7638 : :
7639 : : return new_init;
7640 : : }
7641 : :
7642 : : /* Undo the brace-elision allowed by [dcl.init.aggr] in a
7643 : : brace-enclosed aggregate initializer.
7644 : :
7645 : : INIT is the CONSTRUCTOR containing the list of initializers describing
7646 : : a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
7647 : : It may not presently match the shape of the TYPE; for example:
7648 : :
7649 : : struct S { int a; int b; };
7650 : : struct S a[] = { 1, 2, 3, 4 };
7651 : :
7652 : : Here INIT will hold a vector of four elements, rather than a
7653 : : vector of two elements, each itself a vector of two elements. This
7654 : : routine transforms INIT from the former form into the latter. The
7655 : : revised CONSTRUCTOR node is returned. */
7656 : :
7657 : : tree
7658 : 9020533 : reshape_init (tree type, tree init, tsubst_flags_t complain)
7659 : : {
7660 : 9020533 : vec<constructor_elt, va_gc> *v;
7661 : 9020533 : reshape_iter d;
7662 : 9020533 : tree new_init;
7663 : :
7664 : 9020533 : gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
7665 : :
7666 : 9020533 : v = CONSTRUCTOR_ELTS (init);
7667 : :
7668 : : /* An empty constructor does not need reshaping, and it is always a valid
7669 : : initializer. */
7670 : 9021049 : if (vec_safe_is_empty (v))
7671 : : return init;
7672 : :
7673 : 3760230 : if ((*v)[0].index && TREE_CODE ((*v)[0].index) == FIELD_DECL)
7674 : : /* Already reshaped. */
7675 : : return init;
7676 : :
7677 : : /* Brace elision is not performed for a CONSTRUCTOR representing
7678 : : parenthesized aggregate initialization. */
7679 : 3760093 : if (CONSTRUCTOR_IS_PAREN_INIT (init))
7680 : : {
7681 : 408 : tree elt = (*v)[0].value;
7682 : : /* If we're initializing a char array from a string-literal that is
7683 : : enclosed in braces, unwrap it here. */
7684 : 408 : if (TREE_CODE (type) == ARRAY_TYPE
7685 : 221 : && vec_safe_length (v) == 1
7686 : 121 : && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
7687 : 441 : && TREE_CODE (tree_strip_any_location_wrapper (elt)) == STRING_CST)
7688 : : return elt;
7689 : 379 : return init;
7690 : : }
7691 : :
7692 : : /* Handle [dcl.init.list] direct-list-initialization from
7693 : : single element of enumeration with a fixed underlying type. */
7694 : 3759685 : if (is_direct_enum_init (type, init))
7695 : : {
7696 : 176 : tree elt = CONSTRUCTOR_ELT (init, 0)->value;
7697 : 176 : type = cv_unqualified (type);
7698 : 176 : if (check_narrowing (ENUM_UNDERLYING_TYPE (type), elt, complain))
7699 : : {
7700 : 161 : warning_sentinel w (warn_useless_cast);
7701 : 161 : warning_sentinel w2 (warn_ignored_qualifiers);
7702 : 161 : return cp_build_c_cast (input_location, type, elt,
7703 : : tf_warning_or_error);
7704 : 161 : }
7705 : : else
7706 : 15 : return error_mark_node;
7707 : : }
7708 : :
7709 : : /* Recurse on this CONSTRUCTOR. */
7710 : 3759509 : d.cur = &(*v)[0];
7711 : 3759509 : d.end = d.cur + v->length ();
7712 : 3759509 : d.raw_idx = 0;
7713 : :
7714 : 3759509 : new_init = reshape_init_r (type, &d, init, complain);
7715 : 3759509 : if (new_init == error_mark_node)
7716 : : return error_mark_node;
7717 : :
7718 : : /* Make sure all the element of the constructor were used. Otherwise,
7719 : : issue an error about exceeding initializers. */
7720 : 3758895 : if (d.cur != d.end)
7721 : : {
7722 : 135 : if (complain & tf_error)
7723 : 63 : error ("too many initializers for %qT", type);
7724 : 135 : return error_mark_node;
7725 : : }
7726 : :
7727 : 3758760 : if (CONSTRUCTOR_IS_DIRECT_INIT (init)
7728 : 3758760 : && BRACE_ENCLOSED_INITIALIZER_P (new_init))
7729 : 422191 : CONSTRUCTOR_IS_DIRECT_INIT (new_init) = true;
7730 : 3758760 : if (CONSTRUCTOR_IS_DESIGNATED_INIT (init)
7731 : 3758760 : && BRACE_ENCLOSED_INITIALIZER_P (new_init))
7732 : 29533 : gcc_checking_assert (CONSTRUCTOR_IS_DESIGNATED_INIT (new_init)
7733 : : || seen_error ());
7734 : :
7735 : : return new_init;
7736 : : }
7737 : :
7738 : : /* Verify array initializer. Returns true if errors have been reported. */
7739 : :
7740 : : bool
7741 : 830904 : check_array_initializer (tree decl, tree type, tree init)
7742 : : {
7743 : 830904 : tree element_type = TREE_TYPE (type);
7744 : :
7745 : : /* Structured binding when initialized with an array type needs
7746 : : to have complete type. */
7747 : 830904 : if (decl
7748 : 826792 : && DECL_DECOMPOSITION_P (decl)
7749 : 251 : && DECL_DECOMP_IS_BASE (decl)
7750 : 831155 : && !COMPLETE_TYPE_P (type))
7751 : : {
7752 : 0 : error_at (DECL_SOURCE_LOCATION (decl),
7753 : : "structured binding has incomplete type %qT", type);
7754 : 0 : TREE_TYPE (decl) = error_mark_node;
7755 : 0 : return true;
7756 : : }
7757 : :
7758 : : /* The array type itself need not be complete, because the
7759 : : initializer may tell us how many elements are in the array.
7760 : : But, the elements of the array must be complete. */
7761 : 830904 : if (!COMPLETE_TYPE_P (complete_type (element_type)))
7762 : : {
7763 : 15 : if (decl)
7764 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
7765 : : "elements of array %q#D have incomplete type", decl);
7766 : : else
7767 : 6 : error ("elements of array %q#T have incomplete type", type);
7768 : 15 : return true;
7769 : : }
7770 : :
7771 : 830889 : location_t loc = (decl ? location_of (decl) : input_location);
7772 : 830889 : if (!verify_type_context (loc, TCTX_ARRAY_ELEMENT, element_type))
7773 : : return true;
7774 : :
7775 : : /* A compound literal can't have variable size. */
7776 : 830889 : if (init && !decl
7777 : 830889 : && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
7778 : 4103 : || !TREE_CONSTANT (TYPE_SIZE (element_type))))
7779 : : {
7780 : 3 : error ("variable-sized compound literal");
7781 : 3 : return true;
7782 : : }
7783 : : return false;
7784 : : }
7785 : :
7786 : : /* Subroutine of check_initializer; args are passed down from that function.
7787 : : Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
7788 : :
7789 : : static tree
7790 : 2216362 : build_aggr_init_full_exprs (tree decl, tree init, int flags)
7791 : : {
7792 : 2216362 : gcc_assert (stmts_are_full_exprs_p ());
7793 : 2216362 : if (init)
7794 : 1630924 : maybe_warn_pessimizing_move (init, TREE_TYPE (decl), /*return_p*/false);
7795 : 2216362 : return build_aggr_init (decl, init, flags, tf_warning_or_error);
7796 : : }
7797 : :
7798 : : /* Verify INIT (the initializer for DECL), and record the
7799 : : initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
7800 : : grok_reference_init.
7801 : :
7802 : : If the return value is non-NULL, it is an expression that must be
7803 : : evaluated dynamically to initialize DECL. */
7804 : :
7805 : : static tree
7806 : 39245601 : check_initializer (tree decl, tree init, int flags, vec<tree, va_gc> **cleanups)
7807 : : {
7808 : 39245601 : tree type;
7809 : 39245601 : tree init_code = NULL;
7810 : 39245601 : tree core_type;
7811 : :
7812 : : /* Things that are going to be initialized need to have complete
7813 : : type. */
7814 : 39245601 : TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
7815 : :
7816 : 39245601 : if (DECL_HAS_VALUE_EXPR_P (decl))
7817 : : {
7818 : : /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
7819 : : it doesn't have storage to be initialized. */
7820 : 138 : gcc_assert (init == NULL_TREE);
7821 : : return NULL_TREE;
7822 : : }
7823 : :
7824 : 39245463 : if (type == error_mark_node)
7825 : : /* We will have already complained. */
7826 : : return NULL_TREE;
7827 : :
7828 : 39245463 : if (TREE_CODE (type) == ARRAY_TYPE)
7829 : : {
7830 : 826792 : if (check_array_initializer (decl, type, init))
7831 : : return NULL_TREE;
7832 : : }
7833 : 38418671 : else if (!COMPLETE_TYPE_P (type))
7834 : : {
7835 : 37 : error_at (DECL_SOURCE_LOCATION (decl),
7836 : : "%q#D has incomplete type", decl);
7837 : 37 : TREE_TYPE (decl) = error_mark_node;
7838 : 37 : return NULL_TREE;
7839 : : }
7840 : : else
7841 : : /* There is no way to make a variable-sized class type in GNU C++. */
7842 : 38418634 : gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
7843 : :
7844 : 39245417 : if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
7845 : : {
7846 : 1385351 : int init_len = CONSTRUCTOR_NELTS (init);
7847 : 1385351 : if (SCALAR_TYPE_P (type))
7848 : : {
7849 : 47397 : if (init_len == 0)
7850 : : {
7851 : 41025 : maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
7852 : 41025 : init = build_zero_init (type, NULL_TREE, false);
7853 : : }
7854 : 6372 : else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
7855 : : {
7856 : 12 : error_at (cp_expr_loc_or_loc (init, DECL_SOURCE_LOCATION (decl)),
7857 : : "scalar object %qD requires one element in "
7858 : : "initializer", decl);
7859 : 6 : TREE_TYPE (decl) = error_mark_node;
7860 : 6 : return NULL_TREE;
7861 : : }
7862 : : }
7863 : : }
7864 : :
7865 : 39245411 : if (TREE_CODE (decl) == CONST_DECL)
7866 : : {
7867 : 0 : gcc_assert (!TYPE_REF_P (type));
7868 : :
7869 : 0 : DECL_INITIAL (decl) = init;
7870 : :
7871 : 0 : gcc_assert (init != NULL_TREE);
7872 : : init = NULL_TREE;
7873 : : }
7874 : 39245411 : else if (!init && DECL_REALLY_EXTERN (decl))
7875 : : ;
7876 : 4121388 : else if (init || type_build_ctor_call (type)
7877 : 42781358 : || TYPE_REF_P (type))
7878 : : {
7879 : 35709479 : if (TYPE_REF_P (type))
7880 : : {
7881 : 301691 : init = grok_reference_init (decl, type, init, flags);
7882 : 301691 : flags |= LOOKUP_ALREADY_DIGESTED;
7883 : : }
7884 : 35407788 : else if (!init)
7885 : 585441 : check_for_uninitialized_const_var (decl, /*constexpr_context_p=*/false,
7886 : : tf_warning_or_error);
7887 : : /* Do not reshape constructors of vectors (they don't need to be
7888 : : reshaped. */
7889 : 34822347 : else if (BRACE_ENCLOSED_INITIALIZER_P (init))
7890 : : {
7891 : 1344014 : if (is_std_init_list (type))
7892 : : {
7893 : 318 : init = perform_implicit_conversion (type, init,
7894 : : tf_warning_or_error);
7895 : 318 : flags |= LOOKUP_ALREADY_DIGESTED;
7896 : : }
7897 : 1343696 : else if (TYPE_NON_AGGREGATE_CLASS (type))
7898 : : {
7899 : : /* Don't reshape if the class has constructors. */
7900 : 182864 : if (cxx_dialect == cxx98)
7901 : 6 : error_at (cp_expr_loc_or_loc (init, DECL_SOURCE_LOCATION (decl)),
7902 : : "in C++98 %qD must be initialized by "
7903 : : "constructor, not by %<{...}%>",
7904 : : decl);
7905 : : }
7906 : 1160832 : else if (VECTOR_TYPE_P (type) && TYPE_VECTOR_OPAQUE (type))
7907 : : {
7908 : 0 : error ("opaque vector types cannot be initialized");
7909 : 0 : init = error_mark_node;
7910 : : }
7911 : : else
7912 : : {
7913 : 1160832 : init = reshape_init (type, init, tf_warning_or_error);
7914 : 1160832 : flags |= LOOKUP_NO_NARROWING;
7915 : : }
7916 : : }
7917 : : /* [dcl.init] "Otherwise, if the destination type is an array, the object
7918 : : is initialized as follows..." So handle things like
7919 : :
7920 : : int a[](1, 2, 3);
7921 : :
7922 : : which is permitted in C++20 by P0960. */
7923 : 33478333 : else if (TREE_CODE (init) == TREE_LIST
7924 : 600840 : && TREE_TYPE (init) == NULL_TREE
7925 : 600840 : && TREE_CODE (type) == ARRAY_TYPE
7926 : 165 : && !DECL_DECOMPOSITION_P (decl)
7927 : 33478477 : && (cxx_dialect >= cxx20))
7928 : 124 : init = do_aggregate_paren_init (init, type);
7929 : 33478209 : else if (TREE_CODE (init) == TREE_LIST
7930 : 600716 : && TREE_TYPE (init) != unknown_type_node
7931 : 34078925 : && !MAYBE_CLASS_TYPE_P (type))
7932 : : {
7933 : 130952 : gcc_assert (TREE_CODE (decl) != RESULT_DECL);
7934 : :
7935 : : /* We get here with code like `int a (2);' */
7936 : 130952 : init = build_x_compound_expr_from_list (init, ELK_INIT,
7937 : : tf_warning_or_error);
7938 : : }
7939 : :
7940 : : /* If DECL has an array type without a specific bound, deduce the
7941 : : array size from the initializer. */
7942 : 35709479 : maybe_deduce_size_from_array_init (decl, init);
7943 : 35709479 : type = TREE_TYPE (decl);
7944 : 35709479 : if (type == error_mark_node)
7945 : : return NULL_TREE;
7946 : :
7947 : 68786905 : if (((type_build_ctor_call (type) || CLASS_TYPE_P (type))
7948 : 3225487 : && !(flags & LOOKUP_ALREADY_DIGESTED)
7949 : 3225169 : && !(init && BRACE_ENCLOSED_INITIALIZER_P (init)
7950 : 1193265 : && CP_AGGREGATE_TYPE_P (type)
7951 : 1010401 : && (CLASS_TYPE_P (type)
7952 : : /* The call to build_aggr_init below could end up
7953 : : calling build_vec_init, which may break when we
7954 : : are processing a template. */
7955 : 1540 : || processing_template_decl
7956 : 1474 : || !TYPE_NEEDS_CONSTRUCTING (type)
7957 : 1442 : || type_has_extended_temps (type))))
7958 : 69202798 : || (DECL_DECOMPOSITION_P (decl) && TREE_CODE (type) == ARRAY_TYPE))
7959 : : {
7960 : 2216362 : init_code = build_aggr_init_full_exprs (decl, init, flags);
7961 : :
7962 : : /* A constructor call is a non-trivial initializer even if
7963 : : it isn't explicitly written. */
7964 : 2216362 : if (TREE_SIDE_EFFECTS (init_code))
7965 : 2207702 : DECL_NONTRIVIALLY_INITIALIZED_P (decl) = true;
7966 : :
7967 : : /* If this is a constexpr initializer, expand_default_init will
7968 : : have returned an INIT_EXPR rather than a CALL_EXPR. In that
7969 : : case, pull the initializer back out and pass it down into
7970 : : store_init_value. */
7971 : 5739425 : while (true)
7972 : : {
7973 : 5739425 : if (TREE_CODE (init_code) == EXPR_STMT
7974 : 3536386 : || TREE_CODE (init_code) == STMT_EXPR
7975 : 3527560 : || TREE_CODE (init_code) == CONVERT_EXPR)
7976 : 3514274 : init_code = TREE_OPERAND (init_code, 0);
7977 : 2225151 : else if (TREE_CODE (init_code) == BIND_EXPR)
7978 : 8789 : init_code = BIND_EXPR_BODY (init_code);
7979 : : else
7980 : : break;
7981 : : }
7982 : 2216362 : if (TREE_CODE (init_code) == INIT_EXPR)
7983 : : {
7984 : : /* In C++20, the call to build_aggr_init could have created
7985 : : an INIT_EXPR with a CONSTRUCTOR as the RHS to handle
7986 : : A(1, 2). */
7987 : 1310052 : tree rhs = TREE_OPERAND (init_code, 1);
7988 : 1310052 : if (processing_template_decl && TREE_CODE (rhs) == TARGET_EXPR)
7989 : : /* Avoid leaking TARGET_EXPR into template trees. */
7990 : 4409 : rhs = build_implicit_conv_flags (type, init, flags);
7991 : 1310052 : init = rhs;
7992 : :
7993 : 1310052 : init_code = NULL_TREE;
7994 : : /* Don't call digest_init; it's unnecessary and will complain
7995 : : about aggregate initialization of non-aggregate classes. */
7996 : 1310049 : flags |= LOOKUP_ALREADY_DIGESTED;
7997 : : }
7998 : 906310 : else if (DECL_DECLARED_CONSTEXPR_P (decl)
7999 : 1807842 : || DECL_DECLARED_CONSTINIT_P (decl))
8000 : : {
8001 : : /* Declared constexpr or constinit, but no suitable initializer;
8002 : : massage init appropriately so we can pass it into
8003 : : store_init_value for the error. */
8004 : 4793 : tree new_init = NULL_TREE;
8005 : 4793 : if (!processing_template_decl
8006 : 379 : && TREE_CODE (init_code) == CALL_EXPR)
8007 : 326 : new_init = build_cplus_new (type, init_code, tf_none);
8008 : 4443 : else if (CLASS_TYPE_P (type)
8009 : 8910 : && (!init || TREE_CODE (init) == TREE_LIST))
8010 : 4392 : new_init = build_functional_cast (input_location, type,
8011 : : init, tf_none);
8012 : 4718 : if (new_init)
8013 : : {
8014 : 4718 : init = new_init;
8015 : 4718 : if (TREE_CODE (init) == TARGET_EXPR
8016 : 344 : && !(flags & LOOKUP_ONLYCONVERTING))
8017 : 344 : TARGET_EXPR_DIRECT_INIT_P (init) = true;
8018 : : }
8019 : : init_code = NULL_TREE;
8020 : : }
8021 : : else
8022 : : init = NULL_TREE;
8023 : : }
8024 : :
8025 : 34807957 : if (init && TREE_CODE (init) != TREE_VEC)
8026 : : {
8027 : 34807942 : init_code = store_init_value (decl, init, cleanups, flags);
8028 : :
8029 : 34805245 : if (DECL_INITIAL (decl)
8030 : 22135551 : && TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR
8031 : 36331013 : && !vec_safe_is_empty (CONSTRUCTOR_ELTS (DECL_INITIAL (decl))))
8032 : : {
8033 : 923238 : tree elt = CONSTRUCTOR_ELTS (DECL_INITIAL (decl))->last ().value;
8034 : 923238 : if (TREE_CODE (TREE_TYPE (elt)) == ARRAY_TYPE
8035 : 923238 : && TYPE_SIZE (TREE_TYPE (elt)) == NULL_TREE)
8036 : 36 : cp_complete_array_type (&TREE_TYPE (elt), elt, false);
8037 : : }
8038 : :
8039 : 694493 : if (pedantic && TREE_CODE (type) == ARRAY_TYPE
8040 : 45465 : && DECL_INITIAL (decl)
8041 : 45084 : && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
8042 : 34847730 : && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
8043 : 6 : warning_at (cp_expr_loc_or_loc (DECL_INITIAL (decl),
8044 : 3 : DECL_SOURCE_LOCATION (decl)),
8045 : : 0, "array %qD initialized by parenthesized "
8046 : : "string literal %qE",
8047 : 3 : decl, DECL_INITIAL (decl));
8048 : : init = NULL_TREE;
8049 : : }
8050 : : }
8051 : : else
8052 : : {
8053 : 7071864 : if (CLASS_TYPE_P (core_type = strip_array_types (type))
8054 : 4168661 : && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
8055 : 632716 : || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
8056 : 19 : diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
8057 : : /*complain=*/true);
8058 : :
8059 : 3535932 : check_for_uninitialized_const_var (decl, /*constexpr_context_p=*/false,
8060 : : tf_warning_or_error);
8061 : : }
8062 : :
8063 : 0 : if (init && init != error_mark_node)
8064 : 0 : init_code = cp_build_init_expr (decl, init);
8065 : :
8066 : 13682347 : if (init_code && !TREE_SIDE_EFFECTS (init_code)
8067 : 39261002 : && init_code != error_mark_node)
8068 : : init_code = NULL_TREE;
8069 : :
8070 : 39226615 : if (init_code)
8071 : : {
8072 : : /* We might have set these in cp_finish_decl. */
8073 : 13666253 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = false;
8074 : 13666253 : TREE_CONSTANT (decl) = false;
8075 : : }
8076 : :
8077 : 13666253 : if (init_code
8078 : 13666253 : && DECL_IN_AGGR_P (decl)
8079 : 6 : && DECL_INITIALIZED_IN_CLASS_P (decl))
8080 : : {
8081 : 0 : static int explained = 0;
8082 : :
8083 : 0 : auto_diagnostic_group d;
8084 : 0 : if (cxx_dialect < cxx11)
8085 : 0 : error ("initializer invalid for static member with constructor");
8086 : 0 : else if (cxx_dialect < cxx17)
8087 : 0 : error ("non-constant in-class initialization invalid for static "
8088 : : "member %qD", decl);
8089 : : else
8090 : 0 : error ("non-constant in-class initialization invalid for non-inline "
8091 : : "static member %qD", decl);
8092 : 0 : if (!explained)
8093 : : {
8094 : 0 : inform (input_location,
8095 : : "(an out of class initialization is required)");
8096 : 0 : explained = 1;
8097 : : }
8098 : 0 : return NULL_TREE;
8099 : 0 : }
8100 : :
8101 : : return init_code;
8102 : : }
8103 : :
8104 : : /* If DECL is not a local variable, give it RTL. */
8105 : :
8106 : : static void
8107 : 95180369 : make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
8108 : : {
8109 : 95180369 : int toplev = toplevel_bindings_p ();
8110 : 95180369 : int defer_p;
8111 : :
8112 : : /* Set the DECL_ASSEMBLER_NAME for the object. */
8113 : 95180369 : if (asmspec)
8114 : : {
8115 : : /* The `register' keyword, when used together with an
8116 : : asm-specification, indicates that the variable should be
8117 : : placed in a particular register. */
8118 : 944872 : if (VAR_P (decl) && DECL_REGISTER (decl))
8119 : : {
8120 : 81 : set_user_assembler_name (decl, asmspec);
8121 : 81 : DECL_HARD_REGISTER (decl) = 1;
8122 : : }
8123 : : else
8124 : : {
8125 : 944791 : if (TREE_CODE (decl) == FUNCTION_DECL
8126 : 944791 : && fndecl_built_in_p (decl, BUILT_IN_NORMAL))
8127 : 74586 : set_builtin_user_assembler_name (decl, asmspec);
8128 : 944791 : set_user_assembler_name (decl, asmspec);
8129 : 944791 : if (DECL_LOCAL_DECL_P (decl))
8130 : 6 : if (auto ns_decl = DECL_LOCAL_DECL_ALIAS (decl))
8131 : : /* We have to propagate the name to the ns-alias.
8132 : : This is horrible, as we're affecting a
8133 : : possibly-shared decl. Again, a one-true-decl
8134 : : model breaks down. */
8135 : 6 : if (ns_decl != error_mark_node)
8136 : 6 : set_user_assembler_name (ns_decl, asmspec);
8137 : : }
8138 : : }
8139 : :
8140 : : /* Handle non-variables up front. */
8141 : 95180369 : if (!VAR_P (decl))
8142 : : {
8143 : 50290151 : rest_of_decl_compilation (decl, toplev, at_eof);
8144 : 50290151 : return;
8145 : : }
8146 : :
8147 : : /* If we see a class member here, it should be a static data
8148 : : member. */
8149 : 44890218 : if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
8150 : : {
8151 : 3891193 : gcc_assert (TREE_STATIC (decl));
8152 : : /* An in-class declaration of a static data member should be
8153 : : external; it is only a declaration, and not a definition. */
8154 : 3891193 : if (init == NULL_TREE)
8155 : 3891184 : gcc_assert (DECL_EXTERNAL (decl)
8156 : : || !TREE_PUBLIC (decl));
8157 : : }
8158 : :
8159 : : /* We don't create any RTL for local variables. */
8160 : 44890218 : if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
8161 : : return;
8162 : :
8163 : : /* We defer emission of local statics until the corresponding
8164 : : DECL_EXPR is expanded. But with constexpr its function might never
8165 : : be expanded, so go ahead and tell cgraph about the variable now. */
8166 : 45369634 : defer_p = ((DECL_FUNCTION_SCOPE_P (decl)
8167 : 139319 : && !var_in_maybe_constexpr_fn (decl))
8168 : 45230421 : || DECL_VIRTUAL_P (decl));
8169 : :
8170 : : /* Defer template instantiations. */
8171 : 22684817 : if (DECL_LANG_SPECIFIC (decl)
8172 : 22684817 : && DECL_IMPLICIT_INSTANTIATION (decl))
8173 : : defer_p = 1;
8174 : :
8175 : : /* If we're not deferring, go ahead and assemble the variable. */
8176 : 14582675 : if (!defer_p)
8177 : 12333614 : rest_of_decl_compilation (decl, toplev, at_eof);
8178 : : }
8179 : :
8180 : : /* walk_tree helper for wrap_temporary_cleanups, below. */
8181 : :
8182 : : static tree
8183 : 10152012 : wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
8184 : : {
8185 : : /* Stop at types or full-expression boundaries. */
8186 : 10152012 : if (TYPE_P (*stmt_p)
8187 : 10151805 : || TREE_CODE (*stmt_p) == CLEANUP_POINT_EXPR)
8188 : : {
8189 : 404 : *walk_subtrees = 0;
8190 : 404 : return NULL_TREE;
8191 : : }
8192 : :
8193 : 10151608 : if (TREE_CODE (*stmt_p) == TARGET_EXPR)
8194 : : {
8195 : 172880 : tree guard = (tree)data;
8196 : 172880 : tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
8197 : :
8198 : 95338 : if (tcleanup && !CLEANUP_EH_ONLY (*stmt_p)
8199 : 261975 : && !expr_noexcept_p (tcleanup, tf_none))
8200 : : {
8201 : 145 : tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
8202 : : /* Tell honor_protect_cleanup_actions to handle this as a separate
8203 : : cleanup. */
8204 : 145 : TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
8205 : 145 : TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
8206 : : }
8207 : : }
8208 : :
8209 : : return NULL_TREE;
8210 : : }
8211 : :
8212 : : /* We're initializing a local variable which has a cleanup GUARD. If there
8213 : : are any temporaries used in the initializer INIT of this variable, we
8214 : : need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
8215 : : variable will be cleaned up properly if one of them throws.
8216 : :
8217 : : Unfortunately, there's no way to express this properly in terms of
8218 : : nesting, as the regions for the temporaries overlap the region for the
8219 : : variable itself; if there are two temporaries, the variable needs to be
8220 : : the first thing destroyed if either of the temporary destructors throws.
8221 : : However, we only want to run the variable's cleanup if it actually got
8222 : : constructed. So we need to guard the temporary cleanups with the
8223 : : variable's cleanup if they are run on the normal path, but not if they
8224 : : are run on the exceptional path. We implement this by telling
8225 : : honor_protect_cleanup_actions to strip the variable cleanup from the
8226 : : exceptional path.
8227 : :
8228 : : Another approach could be to make the variable cleanup region enclose
8229 : : initialization, but depend on a flag to indicate that the variable is
8230 : : initialized; that's effectively what we do for arrays. But the current
8231 : : approach works fine for non-arrays, and has no code overhead in the usual
8232 : : case where the temporary destructors are noexcept. */
8233 : :
8234 : : static void
8235 : 941711 : wrap_temporary_cleanups (tree init, tree guard)
8236 : : {
8237 : 941711 : if (TREE_CODE (guard) == BIND_EXPR)
8238 : : {
8239 : : /* An array cleanup region already encloses any temporary cleanups,
8240 : : don't wrap it around them again. */
8241 : 390 : gcc_checking_assert (BIND_EXPR_VEC_DTOR (guard));
8242 : : return;
8243 : : }
8244 : 941321 : cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
8245 : : }
8246 : :
8247 : : /* Generate code to initialize DECL (a local variable). */
8248 : :
8249 : : static void
8250 : 22205383 : initialize_local_var (tree decl, tree init, bool decomp)
8251 : : {
8252 : 22205383 : tree type = TREE_TYPE (decl);
8253 : 22205383 : tree cleanup;
8254 : 22205383 : int already_used;
8255 : :
8256 : 22205383 : gcc_assert (VAR_P (decl) || TREE_CODE (decl) == RESULT_DECL);
8257 : 22205383 : gcc_assert (!TREE_STATIC (decl));
8258 : :
8259 : 22205383 : if (DECL_SIZE (decl) == NULL_TREE)
8260 : : {
8261 : : /* If we used it already as memory, it must stay in memory. */
8262 : 0 : DECL_INITIAL (decl) = NULL_TREE;
8263 : 0 : TREE_ADDRESSABLE (decl) = TREE_USED (decl);
8264 : 0 : return;
8265 : : }
8266 : :
8267 : 22205383 : if (type == error_mark_node)
8268 : : return;
8269 : :
8270 : : /* Compute and store the initial value. */
8271 : 22205383 : already_used = TREE_USED (decl) || TREE_USED (type);
8272 : 22205383 : if (TREE_USED (type))
8273 : 32 : DECL_READ_P (decl) = 1;
8274 : :
8275 : : /* Generate a cleanup, if necessary. */
8276 : 22205383 : cleanup = (decomp ? NULL_TREE
8277 : 22188212 : : cxx_maybe_build_cleanup (decl, tf_warning_or_error));
8278 : :
8279 : : /* Perform the initialization. */
8280 : 22205383 : if (init)
8281 : : {
8282 : 13652873 : tree rinit = (TREE_CODE (init) == INIT_EXPR
8283 : 13652873 : ? TREE_OPERAND (init, 1) : NULL_TREE);
8284 : 12511522 : if (rinit && !TREE_SIDE_EFFECTS (rinit)
8285 : 19503458 : && TREE_OPERAND (init, 0) == decl)
8286 : : {
8287 : : /* Stick simple initializers in DECL_INITIAL so that
8288 : : -Wno-init-self works (c++/34772). */
8289 : 6991936 : DECL_INITIAL (decl) = rinit;
8290 : :
8291 : 6991936 : if (warn_init_self && TYPE_REF_P (type))
8292 : : {
8293 : 2470 : STRIP_NOPS (rinit);
8294 : 2470 : if (rinit == decl)
8295 : 3 : warning_at (DECL_SOURCE_LOCATION (decl),
8296 : : OPT_Winit_self,
8297 : : "reference %qD is initialized with itself", decl);
8298 : : }
8299 : : }
8300 : : else
8301 : : {
8302 : 6660937 : int saved_stmts_are_full_exprs_p;
8303 : :
8304 : : /* If we're only initializing a single object, guard the
8305 : : destructors of any temporaries used in its initializer with
8306 : : its destructor. */
8307 : 6660937 : if (cleanup)
8308 : 936034 : wrap_temporary_cleanups (init, cleanup);
8309 : :
8310 : 6660937 : gcc_assert (building_stmt_list_p ());
8311 : 6660937 : saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
8312 : : /* Avoid CLEANUP_POINT_EXPR for the structured binding
8313 : : bases, those will have CLEANUP_POINT_EXPR at the end of
8314 : : code emitted by cp_finish_decomp. */
8315 : 6660937 : if (decomp)
8316 : 16944 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
8317 : : else
8318 : 6643993 : current_stmt_tree ()->stmts_are_full_exprs_p = 1;
8319 : 6660937 : finish_expr_stmt (init);
8320 : 6660937 : current_stmt_tree ()->stmts_are_full_exprs_p
8321 : 6660937 : = saved_stmts_are_full_exprs_p;
8322 : : }
8323 : : }
8324 : :
8325 : : /* Set this to 0 so we can tell whether an aggregate which was
8326 : : initialized was ever used. Don't do this if it has a
8327 : : destructor, so we don't complain about the 'resource
8328 : : allocation is initialization' idiom. Now set
8329 : : attribute((unused)) on types so decls of that type will be
8330 : : marked used. (see TREE_USED, above.) */
8331 : 22205383 : if (TYPE_NEEDS_CONSTRUCTING (type)
8332 : 1804950 : && ! already_used
8333 : 4393 : && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
8334 : 22209369 : && DECL_NAME (decl))
8335 : 3960 : TREE_USED (decl) = 0;
8336 : 22201423 : else if (already_used)
8337 : 20104686 : TREE_USED (decl) = 1;
8338 : :
8339 : 22205383 : if (cleanup)
8340 : 948176 : finish_decl_cleanup (decl, cleanup);
8341 : : }
8342 : :
8343 : : /* DECL is a VAR_DECL for a compiler-generated variable with static
8344 : : storage duration (like a virtual table) whose initializer is a
8345 : : compile-time constant. Initialize the variable and provide it to the
8346 : : back end. */
8347 : :
8348 : : void
8349 : 2070274 : initialize_artificial_var (tree decl, vec<constructor_elt, va_gc> *v)
8350 : : {
8351 : 2070274 : tree init;
8352 : 2070274 : gcc_assert (DECL_ARTIFICIAL (decl));
8353 : 2070274 : init = build_constructor (TREE_TYPE (decl), v);
8354 : 2070274 : gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
8355 : 2070274 : DECL_INITIAL (decl) = init;
8356 : 2070274 : DECL_INITIALIZED_P (decl) = 1;
8357 : : /* Mark the decl as constexpr so that we can access its content
8358 : : at compile time. */
8359 : 2070274 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = true;
8360 : 2070274 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
8361 : 2070274 : determine_visibility (decl);
8362 : 2070274 : layout_var_decl (decl);
8363 : 2070274 : maybe_commonize_var (decl);
8364 : 2070274 : make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
8365 : 2070274 : }
8366 : :
8367 : : /* INIT is the initializer for a variable, as represented by the
8368 : : parser. Returns true iff INIT is value-dependent. */
8369 : :
8370 : : static bool
8371 : 7607717 : value_dependent_init_p (tree init)
8372 : : {
8373 : 7607717 : if (TREE_CODE (init) == TREE_LIST)
8374 : : /* A parenthesized initializer, e.g.: int i (3, 2); ? */
8375 : 9732 : return any_value_dependent_elements_p (init);
8376 : 7597985 : else if (TREE_CODE (init) == CONSTRUCTOR)
8377 : : /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
8378 : : {
8379 : 36590 : if (dependent_type_p (TREE_TYPE (init)))
8380 : : return true;
8381 : :
8382 : 36584 : vec<constructor_elt, va_gc> *elts;
8383 : 36584 : size_t nelts;
8384 : 36584 : size_t i;
8385 : :
8386 : 36584 : elts = CONSTRUCTOR_ELTS (init);
8387 : 36584 : nelts = vec_safe_length (elts);
8388 : 547588 : for (i = 0; i < nelts; ++i)
8389 : 522743 : if (value_dependent_init_p ((*elts)[i].value))
8390 : : return true;
8391 : : }
8392 : : else
8393 : : /* It must be a simple expression, e.g., int i = 3; */
8394 : 7561395 : return value_dependent_expression_p (init);
8395 : :
8396 : : return false;
8397 : : }
8398 : :
8399 : : /* A helper function to be called via walk_tree. If any label exists
8400 : : under *TP, it is (going to be) forced. Set has_forced_label_in_static. */
8401 : :
8402 : : static tree
8403 : 337 : notice_forced_label_r (tree *tp, int *walk_subtrees, void *)
8404 : : {
8405 : 337 : if (TYPE_P (*tp))
8406 : 0 : *walk_subtrees = 0;
8407 : 337 : if (TREE_CODE (*tp) == LABEL_DECL)
8408 : 6 : cfun->has_forced_label_in_static = 1;
8409 : 337 : return NULL_TREE;
8410 : : }
8411 : :
8412 : : /* Return true if DECL has either a trivial destructor, or for C++20
8413 : : is constexpr and has a constexpr destructor. */
8414 : :
8415 : : static bool
8416 : 32514112 : decl_maybe_constant_destruction (tree decl, tree type)
8417 : : {
8418 : 32514112 : return (TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
8419 : 32514112 : || (cxx_dialect >= cxx20
8420 : 1228242 : && VAR_P (decl)
8421 : 1227825 : && DECL_DECLARED_CONSTEXPR_P (decl)
8422 : 291 : && type_has_constexpr_destructor (strip_array_types (type))));
8423 : : }
8424 : :
8425 : : static tree declare_simd_adjust_this (tree *, int *, void *);
8426 : :
8427 : : /* Helper function of omp_declare_variant_finalize. Finalize one
8428 : : "omp declare variant base" attribute. Return true if it should be
8429 : : removed. */
8430 : :
8431 : : static bool
8432 : 1484 : omp_declare_variant_finalize_one (tree decl, tree attr)
8433 : : {
8434 : 1484 : if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8435 : : {
8436 : 116 : walk_tree (&TREE_VALUE (TREE_VALUE (attr)), declare_simd_adjust_this,
8437 : : DECL_ARGUMENTS (decl), NULL);
8438 : 116 : walk_tree (&TREE_PURPOSE (TREE_VALUE (attr)), declare_simd_adjust_this,
8439 : : DECL_ARGUMENTS (decl), NULL);
8440 : : }
8441 : :
8442 : 1484 : tree ctx = TREE_VALUE (TREE_VALUE (attr));
8443 : 1484 : tree simd = omp_get_context_selector (ctx, OMP_TRAIT_SET_CONSTRUCT,
8444 : : OMP_TRAIT_CONSTRUCT_SIMD);
8445 : 1484 : if (simd)
8446 : : {
8447 : 51 : TREE_VALUE (simd)
8448 : 51 : = c_omp_declare_simd_clauses_to_numbers (DECL_ARGUMENTS (decl),
8449 : 51 : OMP_TS_PROPERTIES (simd));
8450 : : /* FIXME, adjusting simd args unimplemented. */
8451 : 51 : return true;
8452 : : }
8453 : :
8454 : 1433 : tree chain = TREE_CHAIN (TREE_VALUE (attr));
8455 : 1433 : location_t varid_loc
8456 : 1433 : = cp_expr_loc_or_input_loc (TREE_PURPOSE (TREE_CHAIN (chain)));
8457 : 1433 : location_t match_loc = cp_expr_loc_or_input_loc (TREE_PURPOSE (chain));
8458 : 1433 : cp_id_kind idk = (cp_id_kind) tree_to_uhwi (TREE_VALUE (chain));
8459 : 1433 : tree variant = TREE_PURPOSE (TREE_VALUE (attr));
8460 : :
8461 : 1433 : location_t save_loc = input_location;
8462 : 1433 : input_location = varid_loc;
8463 : :
8464 : 1433 : releasing_vec args;
8465 : 1433 : tree parm = DECL_ARGUMENTS (decl);
8466 : 1433 : if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8467 : 116 : parm = DECL_CHAIN (parm);
8468 : 2641 : for (; parm; parm = DECL_CHAIN (parm))
8469 : 1208 : vec_safe_push (args, forward_parm (parm));
8470 : :
8471 : 1433 : unsigned nappend_args = 0;
8472 : 1433 : tree append_args_list = TREE_CHAIN (TREE_CHAIN (chain));
8473 : 1433 : if (append_args_list)
8474 : : {
8475 : 357 : append_args_list = TREE_VALUE (append_args_list);
8476 : 357 : append_args_list = (append_args_list && TREE_CHAIN (append_args_list)
8477 : 594 : ? TREE_VALUE (TREE_CHAIN (append_args_list))
8478 : : : NULL_TREE);
8479 : 744 : for (tree t = append_args_list; t; t = TREE_CHAIN (t))
8480 : 387 : nappend_args++;
8481 : 357 : if (nappend_args)
8482 : : {
8483 : 237 : tree type;
8484 : 237 : if ((type = lookup_qualified_name (global_namespace,
8485 : : "omp_interop_t",
8486 : : LOOK_want::NORMAL,
8487 : : /*complain*/false)) == NULL_TREE
8488 : 237 : || !c_omp_interop_t_p (TREE_TYPE (type)))
8489 : : {
8490 : 24 : location_t loc = input_location;
8491 : 24 : variant = tree_strip_any_location_wrapper (variant);
8492 : 24 : if (!identifier_p (variant))
8493 : : {
8494 : 21 : if (TREE_CODE (variant) == OVERLOAD && OVL_SINGLE_P (variant))
8495 : 21 : variant = OVL_FIRST (variant);
8496 : 21 : loc = EXPR_LOC_OR_LOC (variant,
8497 : : DECL_SOURCE_LOCATION (variant));
8498 : : }
8499 : 24 : error_at (loc, "argument %d of %qE must be of %<omp_interop_t%>",
8500 : 24 : args->length () + 1, variant);
8501 : 24 : inform (EXPR_LOCATION (TREE_PURPOSE (append_args_list)),
8502 : : "%<append_args%> specified here");
8503 : 24 : return true;
8504 : : }
8505 : 564 : for (unsigned i = 0; i < nappend_args; i++)
8506 : 351 : vec_safe_push (args, build_stub_object (TREE_TYPE (type)));
8507 : : }
8508 : : }
8509 : :
8510 : 1409 : bool koenig_p = false;
8511 : 1409 : if (idk == CP_ID_KIND_UNQUALIFIED || idk == CP_ID_KIND_TEMPLATE_ID)
8512 : : {
8513 : 1403 : if (identifier_p (variant)
8514 : : /* In C++20, we may need to perform ADL for a template
8515 : : name. */
8516 : 1379 : || (TREE_CODE (variant) == TEMPLATE_ID_EXPR
8517 : 18 : && identifier_p (TREE_OPERAND (variant, 0))))
8518 : : {
8519 : 24 : if (!args->is_empty ())
8520 : : {
8521 : 24 : koenig_p = true;
8522 : 24 : if (!any_type_dependent_arguments_p (args))
8523 : 21 : variant = perform_koenig_lookup (variant, args,
8524 : : tf_warning_or_error);
8525 : : }
8526 : : else
8527 : 0 : variant = unqualified_fn_lookup_error (variant);
8528 : : }
8529 : 1379 : else if (!args->is_empty () && is_overloaded_fn (variant))
8530 : : {
8531 : 716 : tree fn = get_first_fn (variant);
8532 : 716 : fn = STRIP_TEMPLATE (fn);
8533 : 716 : if (!((TREE_CODE (fn) == USING_DECL && DECL_DEPENDENT_P (fn))
8534 : 716 : || DECL_FUNCTION_MEMBER_P (fn)
8535 : 603 : || DECL_LOCAL_DECL_P (fn)))
8536 : : {
8537 : 603 : koenig_p = true;
8538 : 603 : if (!any_type_dependent_arguments_p (args))
8539 : 552 : variant = perform_koenig_lookup (variant, args,
8540 : : tf_warning_or_error);
8541 : : }
8542 : : }
8543 : : }
8544 : :
8545 : 1409 : if (idk == CP_ID_KIND_QUALIFIED)
8546 : 6 : variant = finish_call_expr (variant, &args, /*disallow_virtual=*/true,
8547 : : koenig_p, tf_warning_or_error);
8548 : : else
8549 : 1403 : variant = finish_call_expr (variant, &args, /*disallow_virtual=*/false,
8550 : : koenig_p, tf_warning_or_error);
8551 : 1409 : if (variant == error_mark_node && !processing_template_decl)
8552 : : return true;
8553 : :
8554 : 1364 : if (TREE_CODE (variant) == TARGET_EXPR)
8555 : 9 : variant = TARGET_EXPR_INITIAL (variant);
8556 : :
8557 : 2719 : variant = cp_get_callee_fndecl_nofold (STRIP_REFERENCE_REF (variant));
8558 : 1364 : input_location = save_loc;
8559 : :
8560 : 1364 : if (variant)
8561 : : {
8562 : 1280 : bool fail;
8563 : 1280 : const char *varname = IDENTIFIER_POINTER (DECL_NAME (variant));
8564 : 1280 : if (!nappend_args)
8565 : 1121 : fail = !comptypes (TREE_TYPE (decl), TREE_TYPE (variant),
8566 : : COMPARE_STRICT);
8567 : : else
8568 : : {
8569 : 159 : unsigned nbase_args = 0;
8570 : 159 : for (tree t = TYPE_ARG_TYPES (TREE_TYPE (decl));
8571 : 756 : t && TREE_VALUE (t) != void_type_node; t = TREE_CHAIN (t))
8572 : 240 : nbase_args++;
8573 : 159 : tree vargs, varg;
8574 : 159 : vargs = varg = TYPE_ARG_TYPES (TREE_TYPE (variant));
8575 : 399 : for (unsigned i = 0; i < nbase_args && varg;
8576 : 240 : i++, varg = TREE_CHAIN (varg))
8577 : 240 : vargs = varg;
8578 : 417 : for (unsigned i = 0; i < nappend_args && varg; i++)
8579 : 258 : varg = TREE_CHAIN (varg);
8580 : 159 : tree saved_vargs;
8581 : 159 : if (nbase_args)
8582 : : {
8583 : 111 : saved_vargs = TREE_CHAIN (vargs);
8584 : 111 : TREE_CHAIN (vargs) = varg;
8585 : : }
8586 : : else
8587 : : {
8588 : 48 : saved_vargs = vargs;
8589 : 48 : TYPE_ARG_TYPES (TREE_TYPE (variant)) = varg;
8590 : : }
8591 : : /* Skip assert check that TYPE_CANONICAL is the same. */
8592 : 159 : fail = !comptypes (TREE_TYPE (decl), TREE_TYPE (variant),
8593 : : COMPARE_STRUCTURAL);
8594 : 159 : if (nbase_args)
8595 : 111 : TREE_CHAIN (vargs) = saved_vargs;
8596 : : else
8597 : 48 : TYPE_ARG_TYPES (TREE_TYPE (variant)) = saved_vargs;
8598 : 159 : varg = saved_vargs;
8599 : 159 : if (!fail && !processing_template_decl)
8600 : 402 : for (unsigned i = 0; i < nappend_args;
8601 : 246 : i++, varg = TREE_CHAIN (varg))
8602 : 507 : if (!varg || !c_omp_interop_t_p (TREE_VALUE (varg)))
8603 : : {
8604 : 9 : error_at (DECL_SOURCE_LOCATION (variant),
8605 : : "argument %d of %qD must be of %<omp_interop_t%>",
8606 : 9 : nbase_args + i + 1, variant);
8607 : 9 : inform (EXPR_LOCATION (TREE_PURPOSE (append_args_list)),
8608 : : "%<append_args%> specified here");
8609 : 9 : break;
8610 : : }
8611 : : }
8612 : 1280 : if (fail)
8613 : : {
8614 : 69 : error_at (varid_loc, "variant %qD and base %qD have incompatible "
8615 : : "types", variant, decl);
8616 : 69 : return true;
8617 : : }
8618 : 1211 : if (fndecl_built_in_p (variant)
8619 : 1211 : && (startswith (varname, "__builtin_")
8620 : 0 : || startswith (varname, "__sync_")
8621 : 0 : || startswith (varname, "__atomic_")))
8622 : : {
8623 : 6 : error_at (varid_loc, "variant %qD is a built-in", variant);
8624 : 6 : return true;
8625 : : }
8626 : : else
8627 : : {
8628 : 1205 : tree construct
8629 : 1205 : = omp_get_context_selector_list (ctx, OMP_TRAIT_SET_CONSTRUCT);
8630 : 1205 : omp_mark_declare_variant (match_loc, variant, construct);
8631 : 1205 : if (!omp_context_selector_matches (ctx, NULL_TREE, false))
8632 : : return true;
8633 : 857 : TREE_PURPOSE (TREE_VALUE (attr)) = variant;
8634 : :
8635 : : // Prepend adjust_args list to variant attributes
8636 : 857 : tree adjust_args_list = TREE_CHAIN (TREE_CHAIN (chain));
8637 : 857 : if (adjust_args_list != NULL_TREE)
8638 : : {
8639 : 513 : if (DECL_NONSTATIC_MEMBER_P (variant)
8640 : 288 : && TREE_VALUE (adjust_args_list))
8641 : : {
8642 : : /* Shift arg position for the added 'this' pointer. */
8643 : : /* Handle need_device_ptr */
8644 : 21 : for (tree t = TREE_PURPOSE (TREE_VALUE (adjust_args_list));
8645 : 51 : t; t = TREE_CHAIN (t))
8646 : 30 : TREE_VALUE (t)
8647 : 30 : = build_int_cst (TREE_TYPE (t),
8648 : 30 : tree_to_uhwi (TREE_VALUE (t)) + 1);
8649 : : }
8650 : 267 : if (DECL_NONSTATIC_MEMBER_P (variant) && append_args_list)
8651 : : {
8652 : : /* Shift likewise the number of args after which the
8653 : : interop object should be added. */
8654 : 6 : tree nargs = TREE_CHAIN (TREE_VALUE (adjust_args_list));
8655 : 6 : TREE_PURPOSE (nargs)
8656 : 6 : = build_int_cst (TREE_TYPE (nargs),
8657 : 6 : tree_to_uhwi (TREE_PURPOSE (nargs)) + 1);
8658 : : }
8659 : 531 : for (tree t = append_args_list; t; t = TREE_CHAIN (t))
8660 : 264 : TREE_VALUE (t)
8661 : 264 : = cp_finish_omp_init_prefer_type (TREE_VALUE (t));
8662 : 534 : DECL_ATTRIBUTES (variant) = tree_cons (
8663 : : get_identifier ("omp declare variant variant args"),
8664 : 534 : TREE_VALUE (adjust_args_list), DECL_ATTRIBUTES (variant));
8665 : : }
8666 : : }
8667 : : }
8668 : 84 : else if (!processing_template_decl)
8669 : : {
8670 : 0 : error_at (varid_loc, "could not find variant declaration");
8671 : 0 : return true;
8672 : : }
8673 : :
8674 : : return false;
8675 : 1433 : }
8676 : :
8677 : : /* Helper function, finish up "omp declare variant base" attribute
8678 : : now that there is a DECL. ATTR is the first "omp declare variant base"
8679 : : attribute. */
8680 : :
8681 : : void
8682 : 1347 : omp_declare_variant_finalize (tree decl, tree attr)
8683 : : {
8684 : 1347 : size_t attr_len = strlen ("omp declare variant base");
8685 : 1347 : tree *list = &DECL_ATTRIBUTES (decl);
8686 : 1347 : bool remove_all = false;
8687 : 1347 : location_t match_loc = DECL_SOURCE_LOCATION (decl);
8688 : 1347 : if (TREE_CHAIN (TREE_VALUE (attr))
8689 : 1347 : && TREE_PURPOSE (TREE_CHAIN (TREE_VALUE (attr)))
8690 : 2694 : && EXPR_HAS_LOCATION (TREE_PURPOSE (TREE_CHAIN (TREE_VALUE (attr)))))
8691 : 1347 : match_loc = EXPR_LOCATION (TREE_PURPOSE (TREE_CHAIN (TREE_VALUE (attr))));
8692 : 2694 : if (DECL_CONSTRUCTOR_P (decl))
8693 : : {
8694 : 27 : error_at (match_loc, "%<declare variant%> on constructor %qD", decl);
8695 : 27 : remove_all = true;
8696 : : }
8697 : 1320 : else if (DECL_DESTRUCTOR_P (decl))
8698 : : {
8699 : 9 : error_at (match_loc, "%<declare variant%> on destructor %qD", decl);
8700 : 9 : remove_all = true;
8701 : : }
8702 : 1311 : else if (DECL_DEFAULTED_FN (decl))
8703 : : {
8704 : 2 : error_at (match_loc, "%<declare variant%> on defaulted %qD", decl);
8705 : 2 : remove_all = true;
8706 : : }
8707 : 1309 : else if (DECL_DELETED_FN (decl))
8708 : : {
8709 : 2 : error_at (match_loc, "%<declare variant%> on deleted %qD", decl);
8710 : 2 : remove_all = true;
8711 : : }
8712 : 1307 : else if (DECL_VIRTUAL_P (decl))
8713 : : {
8714 : 0 : error_at (match_loc, "%<declare variant%> on virtual %qD", decl);
8715 : 0 : remove_all = true;
8716 : : }
8717 : : /* This loop is like private_lookup_attribute, except that it works
8718 : : with tree * rather than tree, as we might want to remove the
8719 : : attributes that are diagnosed as errorneous. */
8720 : 2883 : while (*list)
8721 : : {
8722 : 1536 : tree attr = get_attribute_name (*list);
8723 : 1536 : size_t ident_len = IDENTIFIER_LENGTH (attr);
8724 : 4013 : if (cmp_attribs ("omp declare variant base", attr_len,
8725 : 1536 : IDENTIFIER_POINTER (attr), ident_len))
8726 : : {
8727 : 1524 : if (remove_all || omp_declare_variant_finalize_one (decl, *list))
8728 : : {
8729 : 583 : *list = TREE_CHAIN (*list);
8730 : 583 : continue;
8731 : : }
8732 : : }
8733 : 953 : list = &TREE_CHAIN (*list);
8734 : : }
8735 : 1347 : }
8736 : :
8737 : : static void cp_maybe_mangle_decomp (tree, cp_decomp *);
8738 : :
8739 : : /* Finish processing of a declaration;
8740 : : install its line number and initial value.
8741 : : If the length of an array type is not known before,
8742 : : it must be determined now, from the initial value, or it is an error.
8743 : :
8744 : : INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
8745 : : true, then INIT is an integral constant expression.
8746 : :
8747 : : FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
8748 : : if the (init) syntax was used.
8749 : :
8750 : : DECOMP is first identifier's DECL and identifier count in a structured
8751 : : bindings, nullptr if not a structured binding. */
8752 : :
8753 : : void
8754 : 265192916 : cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
8755 : : tree asmspec_tree, int flags, cp_decomp *decomp)
8756 : : {
8757 : 265192916 : vec<tree, va_gc> *cleanups = NULL;
8758 : 265192916 : const char *asmspec = NULL;
8759 : 265192916 : int was_readonly = 0;
8760 : 265192916 : bool var_definition_p = false;
8761 : 265192916 : tree auto_node;
8762 : 265192916 : auto_vec<tree> extra_cleanups;
8763 : 265192916 : tree aggregates1 = NULL_TREE;
8764 : 265192916 : struct decomp_cleanup {
8765 : : tree decl;
8766 : : cp_decomp *&decomp;
8767 : 265190219 : ~decomp_cleanup ()
8768 : : {
8769 : 265190219 : if (decomp && DECL_DECOMPOSITION_P (decl))
8770 : 69436 : cp_finish_decomp (decl, decomp);
8771 : 265190219 : }
8772 : 265192916 : } decomp_cl = { decl, decomp };
8773 : :
8774 : 265192916 : if (decl == error_mark_node)
8775 : : return;
8776 : 265192891 : else if (! decl)
8777 : : {
8778 : 0 : if (init)
8779 : 0 : error ("assignment (not initialization) in declaration");
8780 : 0 : return;
8781 : : }
8782 : :
8783 : 265192891 : gcc_assert (TREE_CODE (decl) != RESULT_DECL);
8784 : : /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
8785 : 265192891 : gcc_assert (TREE_CODE (decl) != PARM_DECL);
8786 : :
8787 : 265192891 : tree type = TREE_TYPE (decl);
8788 : 265192891 : if (type == error_mark_node)
8789 : : return;
8790 : :
8791 : 265192396 : if (VAR_P (decl) && is_copy_initialization (init))
8792 : 72554862 : flags |= LOOKUP_ONLYCONVERTING;
8793 : :
8794 : : /* Warn about register storage specifiers except when in GNU global
8795 : : or local register variable extension. */
8796 : 265192396 : if (VAR_P (decl) && DECL_REGISTER (decl) && asmspec_tree == NULL_TREE)
8797 : : {
8798 : 1922 : if (cxx_dialect >= cxx17)
8799 : 1276 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
8800 : : "ISO C++17 does not allow %<register%> storage "
8801 : : "class specifier");
8802 : : else
8803 : 646 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
8804 : : "%<register%> storage class specifier used");
8805 : : }
8806 : :
8807 : : /* If a name was specified, get the string. */
8808 : 265192396 : if (at_namespace_scope_p ())
8809 : 54713947 : asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
8810 : 265192396 : if (asmspec_tree && asmspec_tree != error_mark_node)
8811 : 944875 : asmspec = TREE_STRING_POINTER (asmspec_tree);
8812 : :
8813 : 265192396 : bool in_class_decl
8814 : 265192396 : = (current_class_type
8815 : 164386711 : && CP_DECL_CONTEXT (decl) == current_class_type
8816 : 110416064 : && TYPE_BEING_DEFINED (current_class_type)
8817 : 374139068 : && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type));
8818 : :
8819 : 105815424 : if (in_class_decl
8820 : 105815424 : && (DECL_INITIAL (decl) || init))
8821 : 75860011 : DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
8822 : :
8823 : 265192396 : if (VAR_P (decl)
8824 : 265192396 : && (auto_node = type_uses_auto (type)))
8825 : : {
8826 : 8037235 : tree d_init;
8827 : 8037235 : if (init == NULL_TREE)
8828 : : {
8829 : 419 : if (DECL_LANG_SPECIFIC (decl)
8830 : 341 : && DECL_TEMPLATE_INSTANTIATION (decl)
8831 : 757 : && !DECL_TEMPLATE_INSTANTIATED (decl))
8832 : : {
8833 : : /* init is null because we're deferring instantiating the
8834 : : initializer until we need it. Well, we need it now. */
8835 : 332 : instantiate_decl (decl, /*defer_ok*/true, /*expl*/false);
8836 : 332 : return;
8837 : : }
8838 : :
8839 : 87 : if (CLASS_PLACEHOLDER_TEMPLATE (auto_node))
8840 : : /* Class deduction with no initializer is OK. */;
8841 : : else
8842 : : {
8843 : : /* Ordinary auto deduction without an initializer, a situation
8844 : : which grokdeclarator already detects and rejects for the most
8845 : : part. But we can still get here if we're instantiating a
8846 : : variable template before we've fully parsed (and attached) its
8847 : : initializer, e.g. template<class> auto x = x<int>; */
8848 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
8849 : : "declaration of %q#D has no initializer", decl);
8850 : 3 : TREE_TYPE (decl) = error_mark_node;
8851 : 3 : return;
8852 : : }
8853 : : }
8854 : 8036900 : d_init = init;
8855 : 8036900 : if (d_init)
8856 : : {
8857 : 8036816 : if (TREE_CODE (d_init) == TREE_LIST
8858 : 8074734 : && !CLASS_PLACEHOLDER_TEMPLATE (auto_node))
8859 : 21571 : d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
8860 : : tf_warning_or_error);
8861 : 8036816 : d_init = resolve_nondeduced_context (d_init, tf_warning_or_error);
8862 : : /* Force auto deduction now. Use tf_none to avoid redundant warnings
8863 : : on deprecated-14.C. */
8864 : 8036816 : mark_single_function (d_init, tf_none);
8865 : : }
8866 : 8036900 : enum auto_deduction_context adc = adc_variable_type;
8867 : 8036900 : if (DECL_DECOMPOSITION_P (decl))
8868 : : adc = adc_decomp_type;
8869 : 8036900 : tree outer_targs = NULL_TREE;
8870 : 8036900 : if (PLACEHOLDER_TYPE_CONSTRAINTS_INFO (auto_node)
8871 : 323 : && DECL_LANG_SPECIFIC (decl)
8872 : 126 : && DECL_TEMPLATE_INFO (decl)
8873 : 8036957 : && !DECL_FUNCTION_SCOPE_P (decl))
8874 : : /* The outer template arguments might be needed for satisfaction.
8875 : : (For function scope variables, do_auto_deduction will obtain the
8876 : : outer template arguments from current_function_decl.) */
8877 : 57 : outer_targs = DECL_TI_ARGS (decl);
8878 : 8036900 : type = TREE_TYPE (decl) = do_auto_deduction (type, d_init, auto_node,
8879 : : tf_warning_or_error, adc,
8880 : : outer_targs, flags);
8881 : 8036900 : if (type == error_mark_node)
8882 : : return;
8883 : 8036066 : if (TREE_CODE (type) == FUNCTION_TYPE)
8884 : : {
8885 : 3 : error ("initializer for %<decltype(auto) %D%> has function type; "
8886 : : "did you forget the %<()%>?", decl);
8887 : 3 : TREE_TYPE (decl) = error_mark_node;
8888 : 3 : return;
8889 : : }
8890 : : /* As in start_decl_1, complete so TREE_READONLY is set properly. */
8891 : 8036063 : if (!processing_template_decl
8892 : 1820366 : && !type_uses_auto (type)
8893 : 9856422 : && !COMPLETE_TYPE_P (complete_type (type)))
8894 : : {
8895 : 15 : auto_diagnostic_group d;
8896 : 15 : error_at (location_of (decl),
8897 : : "deduced type %qT for %qD is incomplete", type, decl);
8898 : 15 : cxx_incomplete_type_inform (type);
8899 : 15 : TREE_TYPE (decl) = error_mark_node;
8900 : 15 : return;
8901 : 15 : }
8902 : :
8903 : : /* Now that we have a type, try these again. */
8904 : 8036048 : layout_decl (decl, 0);
8905 : 8036048 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
8906 : :
8907 : : /* Update the type of the corresponding TEMPLATE_DECL to match. */
8908 : 8036048 : if (DECL_LANG_SPECIFIC (decl)
8909 : 128736 : && DECL_TEMPLATE_INFO (decl)
8910 : 8043164 : && DECL_TEMPLATE_RESULT (DECL_TI_TEMPLATE (decl)) == decl)
8911 : 6645 : TREE_TYPE (DECL_TI_TEMPLATE (decl)) = type;
8912 : : }
8913 : :
8914 : 265191209 : if (ensure_literal_type_for_constexpr_object (decl) == error_mark_node)
8915 : : {
8916 : 54 : DECL_DECLARED_CONSTEXPR_P (decl) = 0;
8917 : 54 : if (VAR_P (decl) && DECL_CLASS_SCOPE_P (decl))
8918 : : {
8919 : 6 : init = NULL_TREE;
8920 : 6 : DECL_EXTERNAL (decl) = 1;
8921 : : }
8922 : : }
8923 : :
8924 : 265191209 : if (VAR_P (decl)
8925 : 93168636 : && DECL_CLASS_SCOPE_P (decl)
8926 : 13993800 : && verify_type_context (DECL_SOURCE_LOCATION (decl),
8927 : : TCTX_STATIC_STORAGE, type)
8928 : 279185009 : && DECL_INITIALIZED_IN_CLASS_P (decl))
8929 : 12902119 : check_static_variable_definition (decl, type);
8930 : :
8931 : 265191209 : if (!processing_template_decl && VAR_P (decl) && is_global_var (decl))
8932 : : {
8933 : 20617240 : type_context_kind context = (DECL_THREAD_LOCAL_P (decl)
8934 : 20617240 : ? TCTX_THREAD_STORAGE
8935 : 20617240 : : TCTX_STATIC_STORAGE);
8936 : 20617240 : verify_type_context (input_location, context, TREE_TYPE (decl));
8937 : : }
8938 : :
8939 : 265191209 : if (init && TREE_CODE (decl) == FUNCTION_DECL)
8940 : : {
8941 : 335546 : tree clone;
8942 : 335546 : if (init == ridpointers[(int)RID_DELETE]
8943 : 335546 : || (TREE_CODE (init) == STRING_CST
8944 : 24 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
8945 : : {
8946 : : /* FIXME check this is 1st decl. */
8947 : 313416 : if (UNLIKELY (DECL_MAIN_P (decl)))
8948 : : {
8949 : : /* [basic.start.main]/3: A program that defines main as deleted
8950 : : is ill-formed. */
8951 : 3 : error ("%<::main%> cannot be deleted");
8952 : 3 : DECL_INITIAL (decl) = NULL_TREE;
8953 : : }
8954 : : else
8955 : : {
8956 : 313413 : DECL_DELETED_FN (decl) = 1;
8957 : 313413 : DECL_DECLARED_INLINE_P (decl) = 1;
8958 : 313413 : DECL_INITIAL (decl)
8959 : 313413 : = TREE_CODE (init) == STRING_CST ? init : error_mark_node;
8960 : 313431 : FOR_EACH_CLONE (clone, decl)
8961 : : {
8962 : 18 : DECL_DELETED_FN (clone) = 1;
8963 : 18 : DECL_DECLARED_INLINE_P (clone) = 1;
8964 : 18 : DECL_INITIAL (clone) = DECL_INITIAL (decl);
8965 : : }
8966 : : }
8967 : 313416 : init = NULL_TREE;
8968 : : }
8969 : 22130 : else if (init == ridpointers[(int)RID_DEFAULT])
8970 : : {
8971 : 22118 : if (defaultable_fn_check (decl))
8972 : 22094 : DECL_DEFAULTED_FN (decl) = 1;
8973 : : else
8974 : 24 : DECL_INITIAL (decl) = NULL_TREE;
8975 : : }
8976 : : }
8977 : :
8978 : 265191209 : if (init && VAR_P (decl))
8979 : : {
8980 : 79229368 : DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
8981 : : /* If DECL is a reference, then we want to know whether init is a
8982 : : reference constant; init_const_expr_p as passed tells us whether
8983 : : it's an rvalue constant. */
8984 : 79229368 : if (TYPE_REF_P (type))
8985 : 2151702 : init_const_expr_p = potential_constant_expression (init);
8986 : 79229368 : if (init_const_expr_p)
8987 : : {
8988 : : /* Set these flags now for templates. We'll update the flags in
8989 : : store_init_value for instantiations. */
8990 : 67669824 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
8991 : 67669824 : if (decl_maybe_constant_var_p (decl)
8992 : : /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
8993 : 67669824 : && !TYPE_REF_P (type))
8994 : 23556408 : TREE_CONSTANT (decl) = true;
8995 : : }
8996 : : /* This is handled mostly by gimplify.cc, but we have to deal with
8997 : : not warning about int x = x; as it is a GCC extension to turn off
8998 : : this warning but only if warn_init_self is zero. */
8999 : 79229368 : if (!DECL_EXTERNAL (decl)
9000 : 77786697 : && !TREE_STATIC (decl)
9001 : 59692143 : && decl == tree_strip_any_location_wrapper (init)
9002 : 79232591 : && !warning_enabled_at (DECL_SOURCE_LOCATION (decl), OPT_Winit_self))
9003 : 3199 : suppress_warning (decl, OPT_Winit_self);
9004 : : }
9005 : 185961841 : else if (VAR_P (decl)
9006 : 13939268 : && COMPLETE_TYPE_P (type)
9007 : 10965954 : && !TYPE_REF_P (type)
9008 : 10965592 : && !dependent_type_p (type)
9009 : 196646205 : && is_really_empty_class (type, /*ignore_vptr*/false))
9010 : : /* We have no initializer but there's nothing to initialize anyway.
9011 : : Treat DECL as constant due to c++/109876. */
9012 : 471086 : TREE_CONSTANT (decl) = true;
9013 : :
9014 : 265191209 : if (flag_openmp
9015 : 435938 : && TREE_CODE (decl) == FUNCTION_DECL
9016 : : /* #pragma omp declare variant on methods handled in finish_struct
9017 : : instead. */
9018 : 265386322 : && (!DECL_OBJECT_MEMBER_FUNCTION_P (decl)
9019 : 58315 : || COMPLETE_TYPE_P (DECL_CONTEXT (decl))))
9020 : 137149 : if (tree attr = lookup_attribute ("omp declare variant base",
9021 : 137149 : DECL_ATTRIBUTES (decl)))
9022 : 964 : omp_declare_variant_finalize (decl, attr);
9023 : :
9024 : 265191209 : if (processing_template_decl)
9025 : : {
9026 : 154612366 : bool type_dependent_p;
9027 : :
9028 : : /* Add this declaration to the statement-tree. */
9029 : 154612366 : if (at_function_scope_p ())
9030 : 56467701 : add_decl_expr (decl);
9031 : :
9032 : 154612366 : type_dependent_p = dependent_type_p (type);
9033 : :
9034 : 154612366 : if (check_for_bare_parameter_packs (init))
9035 : : {
9036 : 3 : init = NULL_TREE;
9037 : 3 : DECL_INITIAL (decl) = NULL_TREE;
9038 : : }
9039 : :
9040 : : /* Generally, initializers in templates are expanded when the
9041 : : template is instantiated. But, if DECL is a variable constant
9042 : : then it can be used in future constant expressions, so its value
9043 : : must be available. */
9044 : :
9045 : 154612366 : bool dep_init = false;
9046 : :
9047 : 154612366 : if (!VAR_P (decl) || type_dependent_p)
9048 : : /* We can't do anything if the decl has dependent type. */;
9049 : 18884174 : else if (init
9050 : 17346035 : && (init_const_expr_p || DECL_DECLARED_CONSTEXPR_P (decl))
9051 : 13681397 : && !TYPE_REF_P (type)
9052 : 13657815 : && decl_maybe_constant_var_p (decl)
9053 : 25969148 : && !(dep_init = value_dependent_init_p (init)))
9054 : : {
9055 : : /* This variable seems to be a non-dependent constant, so process
9056 : : its initializer. If check_initializer returns non-null the
9057 : : initialization wasn't constant after all. */
9058 : 1639579 : tree init_code;
9059 : 1639579 : cleanups = make_tree_vector ();
9060 : 1639579 : init_code = check_initializer (decl, init, flags, &cleanups);
9061 : 1639579 : if (init_code == NULL_TREE)
9062 : 1639579 : init = NULL_TREE;
9063 : 1639579 : release_tree_vector (cleanups);
9064 : : }
9065 : : else
9066 : : {
9067 : 17244595 : gcc_assert (!DECL_PRETTY_FUNCTION_P (decl));
9068 : : /* Try to deduce array size. */
9069 : 17244595 : maybe_deduce_size_from_array_init (decl, init);
9070 : : /* And complain about multiple initializers. */
9071 : 15706456 : if (init && TREE_CODE (init) == TREE_LIST && TREE_CHAIN (init)
9072 : 17306035 : && !MAYBE_CLASS_TYPE_P (type))
9073 : 7 : init = build_x_compound_expr_from_list (init, ELK_INIT,
9074 : : tf_warning_or_error);
9075 : : }
9076 : :
9077 : 154612366 : if (init)
9078 : 44838342 : DECL_INITIAL (decl) = init;
9079 : :
9080 : 154612366 : if (dep_init)
9081 : : {
9082 : 5445395 : retrofit_lang_decl (decl);
9083 : 5445395 : SET_DECL_DEPENDENT_INIT_P (decl, true);
9084 : : }
9085 : :
9086 : 154612366 : if (VAR_P (decl) && DECL_REGISTER (decl) && asmspec)
9087 : : {
9088 : 3 : set_user_assembler_name (decl, asmspec);
9089 : 3 : DECL_HARD_REGISTER (decl) = 1;
9090 : : }
9091 : 154612366 : return;
9092 : : }
9093 : :
9094 : : /* Just store non-static data member initializers for later. */
9095 : 110578843 : if (init && TREE_CODE (decl) == FIELD_DECL)
9096 : 361748 : DECL_INITIAL (decl) = init;
9097 : :
9098 : : /* Take care of TYPE_DECLs up front. */
9099 : 110578843 : if (TREE_CODE (decl) == TYPE_DECL)
9100 : : {
9101 : 9266151 : if (type != error_mark_node
9102 : 9266151 : && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
9103 : : {
9104 : 4239527 : if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
9105 : 0 : warning (0, "shadowing previous type declaration of %q#D", decl);
9106 : 4239527 : set_identifier_type_value (DECL_NAME (decl), decl);
9107 : : }
9108 : :
9109 : : /* If we have installed this as the canonical typedef for this
9110 : : type, and that type has not been defined yet, delay emitting
9111 : : the debug information for it, as we will emit it later. */
9112 : 9266151 : if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
9113 : 9266151 : && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
9114 : 535604 : TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
9115 : :
9116 : 9266151 : rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
9117 : : at_eof);
9118 : 9266151 : return;
9119 : : }
9120 : :
9121 : : /* A reference will be modified here, as it is initialized. */
9122 : 101312692 : if (! DECL_EXTERNAL (decl)
9123 : 44850237 : && TREE_READONLY (decl)
9124 : 123415794 : && TYPE_REF_P (type))
9125 : : {
9126 : 222001 : was_readonly = 1;
9127 : 222001 : TREE_READONLY (decl) = 0;
9128 : : }
9129 : :
9130 : : /* This needs to happen before extend_ref_init_temps. */
9131 : 101312692 : if (VAR_OR_FUNCTION_DECL_P (decl))
9132 : : {
9133 : 93112804 : if (VAR_P (decl))
9134 : 42822653 : maybe_commonize_var (decl);
9135 : 93112804 : determine_visibility (decl);
9136 : : }
9137 : :
9138 : 101312692 : if (VAR_P (decl))
9139 : : {
9140 : 42822653 : duration_kind dk = decl_storage_duration (decl);
9141 : : /* [dcl.constinit]/1 "The constinit specifier shall be applied
9142 : : only to a declaration of a variable with static or thread storage
9143 : : duration." */
9144 : 42822653 : if (DECL_DECLARED_CONSTINIT_P (decl)
9145 : 42822653 : && !(dk == dk_thread || dk == dk_static))
9146 : : {
9147 : 12 : error_at (DECL_SOURCE_LOCATION (decl),
9148 : : "%<constinit%> can only be applied to a variable with "
9149 : : "static or thread storage duration");
9150 : 12 : return;
9151 : : }
9152 : :
9153 : 42822641 : if (decomp)
9154 : : {
9155 : 32541 : cp_maybe_mangle_decomp (decl, decomp);
9156 : 32541 : if (TREE_STATIC (decl) && !DECL_FUNCTION_SCOPE_P (decl))
9157 : : {
9158 : 254 : if (CP_DECL_THREAD_LOCAL_P (decl))
9159 : 32 : aggregates1 = tls_aggregates;
9160 : : else
9161 : 222 : aggregates1 = static_aggregates;
9162 : : }
9163 : : }
9164 : :
9165 : : /* If this is a local variable that will need a mangled name,
9166 : : register it now. We must do this before processing the
9167 : : initializer for the variable, since the initialization might
9168 : : require a guard variable, and since the mangled name of the
9169 : : guard variable will depend on the mangled name of this
9170 : : variable. */
9171 : 85645282 : if (DECL_FUNCTION_SCOPE_P (decl)
9172 : 22344720 : && TREE_STATIC (decl)
9173 : 42961960 : && !DECL_ARTIFICIAL (decl))
9174 : : {
9175 : : /* The variable holding an anonymous union will have had its
9176 : : discriminator set in finish_anon_union, after which it's
9177 : : NAME will have been cleared. */
9178 : 139024 : if (DECL_NAME (decl))
9179 : 138981 : determine_local_discriminator (decl);
9180 : : /* Normally has_forced_label_in_static is set during GIMPLE
9181 : : lowering, but [cd]tors are never actually compiled directly.
9182 : : We need to set this early so we can deal with the label
9183 : : address extension. */
9184 : 139024 : if ((DECL_CONSTRUCTOR_P (current_function_decl)
9185 : 138995 : || DECL_DESTRUCTOR_P (current_function_decl))
9186 : 139034 : && init)
9187 : : {
9188 : 29 : walk_tree (&init, notice_forced_label_r, NULL, NULL);
9189 : 29 : add_local_decl (cfun, decl);
9190 : : }
9191 : : /* And make sure it's in the symbol table for
9192 : : c_parse_final_cleanups to find. */
9193 : 139024 : varpool_node::get_create (decl);
9194 : : }
9195 : :
9196 : : /* Convert the initializer to the type of DECL, if we have not
9197 : : already initialized DECL. */
9198 : 42822641 : if (!DECL_INITIALIZED_P (decl)
9199 : : /* If !DECL_EXTERNAL then DECL is being defined. In the
9200 : : case of a static data member initialized inside the
9201 : : class-specifier, there can be an initializer even if DECL
9202 : : is *not* defined. */
9203 : 42822641 : && (!DECL_EXTERNAL (decl) || init))
9204 : : {
9205 : 37606022 : cleanups = make_tree_vector ();
9206 : 37606022 : init = check_initializer (decl, init, flags, &cleanups);
9207 : :
9208 : : /* Handle:
9209 : :
9210 : : [dcl.init]
9211 : :
9212 : : The memory occupied by any object of static storage
9213 : : duration is zero-initialized at program startup before
9214 : : any other initialization takes place.
9215 : :
9216 : : We cannot create an appropriate initializer until after
9217 : : the type of DECL is finalized. If DECL_INITIAL is set,
9218 : : then the DECL is statically initialized, and any
9219 : : necessary zero-initialization has already been performed. */
9220 : 37603325 : if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
9221 : 402716 : DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
9222 : : /*nelts=*/NULL_TREE,
9223 : : /*static_storage_p=*/true);
9224 : : /* Remember that the initialization for this variable has
9225 : : taken place. */
9226 : 37603325 : DECL_INITIALIZED_P (decl) = 1;
9227 : : /* This declaration is the definition of this variable,
9228 : : unless we are initializing a static data member within
9229 : : the class specifier. */
9230 : 37603325 : if (!DECL_EXTERNAL (decl))
9231 : 42819944 : var_definition_p = true;
9232 : : }
9233 : : /* If the variable has an array type, lay out the type, even if
9234 : : there is no initializer. It is valid to index through the
9235 : : array, and we must get TYPE_ALIGN set correctly on the array
9236 : : type. */
9237 : 5216619 : else if (TREE_CODE (type) == ARRAY_TYPE)
9238 : 211797 : layout_type (type);
9239 : :
9240 : 42819944 : if (TREE_STATIC (decl)
9241 : 20062651 : && !at_function_scope_p ()
9242 : 62743276 : && current_function_decl == NULL)
9243 : : /* So decl is a global variable or a static member of a
9244 : : non local class. Record the types it uses
9245 : : so that we can decide later to emit debug info for them. */
9246 : 19923320 : record_types_used_by_current_var_decl (decl);
9247 : : }
9248 : :
9249 : : /* Add this declaration to the statement-tree. This needs to happen
9250 : : after the call to check_initializer so that the DECL_EXPR for a
9251 : : reference temp is added before the DECL_EXPR for the reference itself. */
9252 : 101309983 : if (DECL_FUNCTION_SCOPE_P (decl))
9253 : : {
9254 : : /* If we're building a variable sized type, and we might be
9255 : : reachable other than via the top of the current binding
9256 : : level, then create a new BIND_EXPR so that we deallocate
9257 : : the object at the right time. */
9258 : 22344720 : if (VAR_P (decl)
9259 : 22344720 : && DECL_SIZE (decl)
9260 : 22296980 : && !TREE_CONSTANT (DECL_SIZE (decl))
9261 : 22345702 : && STATEMENT_LIST_HAS_LABEL (cur_stmt_list))
9262 : : {
9263 : 3 : tree bind;
9264 : 3 : bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL);
9265 : 3 : TREE_SIDE_EFFECTS (bind) = 1;
9266 : 3 : add_stmt (bind);
9267 : 3 : BIND_EXPR_BODY (bind) = push_stmt_list ();
9268 : : }
9269 : 22344720 : add_decl_expr (decl);
9270 : : }
9271 : :
9272 : 101309983 : tree decomp_init = NULL_TREE;
9273 : : /* Let the middle end know about variables and functions -- but not
9274 : : static data members in uninstantiated class templates. */
9275 : 101309983 : if (VAR_OR_FUNCTION_DECL_P (decl))
9276 : : {
9277 : 93110095 : if (VAR_P (decl))
9278 : : {
9279 : 42819944 : layout_var_decl (decl);
9280 : 42819944 : if (!flag_weak)
9281 : : /* Check again now that we have an initializer. */
9282 : 57 : maybe_commonize_var (decl);
9283 : : /* A class-scope constexpr variable with an out-of-class declaration.
9284 : : C++17 makes them implicitly inline, but still force it out. */
9285 : 57967664 : if (DECL_INLINE_VAR_P (decl)
9286 : 13874979 : && !DECL_VAR_DECLARED_INLINE_P (decl)
9287 : 8256595 : && !DECL_TEMPLATE_INSTANTIATION (decl)
9288 : 27093970 : && !in_class_decl)
9289 : 100 : mark_needed (decl);
9290 : : }
9291 : :
9292 : 93110095 : if (var_definition_p
9293 : : /* With -fmerge-all-constants, gimplify_init_constructor
9294 : : might add TREE_STATIC to aggregate variables. */
9295 : 36585872 : && (TREE_STATIC (decl)
9296 : 22205401 : || (flag_merge_constants >= 2
9297 : 38 : && AGGREGATE_TYPE_P (type))))
9298 : : {
9299 : : /* If a TREE_READONLY variable needs initialization
9300 : : at runtime, it is no longer readonly and we need to
9301 : : avoid MEM_READONLY_P being set on RTL created for it. */
9302 : 14380474 : if (init)
9303 : : {
9304 : 13374 : if (TREE_READONLY (decl))
9305 : 507 : TREE_READONLY (decl) = 0;
9306 : : was_readonly = 0;
9307 : : }
9308 : 14367100 : else if (was_readonly)
9309 : 1564 : TREE_READONLY (decl) = 1;
9310 : :
9311 : : /* Likewise if it needs destruction. */
9312 : 14380474 : if (!decl_maybe_constant_destruction (decl, type))
9313 : 3046 : TREE_READONLY (decl) = 0;
9314 : : }
9315 : 78729621 : else if (VAR_P (decl)
9316 : 28439470 : && CP_DECL_THREAD_LOCAL_P (decl)
9317 : 19459 : && (!DECL_EXTERNAL (decl) || flag_extern_tls_init)
9318 : 19459 : && (was_readonly || TREE_READONLY (decl))
9319 : 78729636 : && var_needs_tls_wrapper (decl))
9320 : : {
9321 : : /* TLS variables need dynamic initialization by the TLS wrapper
9322 : : function, we don't want to hoist accesses to it before the
9323 : : wrapper. */
9324 : 6 : was_readonly = 0;
9325 : 6 : TREE_READONLY (decl) = 0;
9326 : : }
9327 : :
9328 : 93110095 : make_rtl_for_nonlocal_decl (decl, init, asmspec);
9329 : :
9330 : : /* Check for abstractness of the type. */
9331 : 93110095 : if (var_definition_p)
9332 : 36585872 : abstract_virtuals_error (decl, type);
9333 : :
9334 : 93110095 : if (decomp && !cp_finish_decomp (decl, decomp, true))
9335 : 15216 : decomp = NULL;
9336 : :
9337 : 93110095 : if (TREE_TYPE (decl) == error_mark_node)
9338 : : /* No initialization required. */
9339 : : ;
9340 : 93110024 : else if (TREE_CODE (decl) == FUNCTION_DECL)
9341 : : {
9342 : 50290151 : if (init)
9343 : : {
9344 : 576 : if (init == ridpointers[(int)RID_DEFAULT])
9345 : : {
9346 : : /* An out-of-class default definition is defined at
9347 : : the point where it is explicitly defaulted. */
9348 : 564 : if (DECL_DELETED_FN (decl))
9349 : 6 : maybe_explain_implicit_delete (decl);
9350 : 558 : else if (DECL_INITIAL (decl) == error_mark_node)
9351 : 534 : synthesize_method (decl);
9352 : : }
9353 : : else
9354 : 24 : error_at (cp_expr_loc_or_loc (init,
9355 : 12 : DECL_SOURCE_LOCATION (decl)),
9356 : : "function %q#D is initialized like a variable",
9357 : : decl);
9358 : : }
9359 : : /* else no initialization required. */
9360 : : }
9361 : 42819873 : else if (DECL_EXTERNAL (decl)
9362 : 42819873 : && ! (DECL_LANG_SPECIFIC (decl)
9363 : 5930152 : && DECL_NOT_REALLY_EXTERN (decl)))
9364 : : {
9365 : : /* check_initializer will have done any constant initialization. */
9366 : : }
9367 : : /* A variable definition. */
9368 : 38358887 : else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
9369 : : {
9370 : : /* Initialize the local variable. */
9371 : 22205383 : if (!decomp)
9372 : 22188212 : initialize_local_var (decl, init, false);
9373 : : else
9374 : : {
9375 : 17171 : tree cleanup = NULL_TREE;
9376 : 17171 : if (DECL_SIZE (decl))
9377 : 17171 : cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
9378 : : /* If cp_finish_decomp needs to emit any code, we need to emit that
9379 : : code after code emitted by initialize_local_var in a single
9380 : : CLEANUP_POINT_EXPR, so that temporaries are destructed only
9381 : : after the cp_finish_decomp emitted code.
9382 : : If there are any cleanups, either extend_ref_init_temps
9383 : : created ones or e.g. array destruction, push those first
9384 : : with the cleanups guarded on a bool temporary, initially
9385 : : set to false and set to true after initialize_local_var
9386 : : emitted code. */
9387 : 17171 : tree guard = NULL_TREE;
9388 : 17171 : if (cleanups || cleanup)
9389 : : {
9390 : 17171 : guard = get_internal_target_expr (boolean_false_node);
9391 : 17171 : add_stmt (guard);
9392 : 17171 : guard = TARGET_EXPR_SLOT (guard);
9393 : : }
9394 : 17171 : tree sl = push_stmt_list ();
9395 : 17171 : initialize_local_var (decl, init, true);
9396 : 17171 : if (guard)
9397 : : {
9398 : 17171 : add_stmt (build2 (MODIFY_EXPR, boolean_type_node,
9399 : : guard, boolean_true_node));
9400 : 17189 : for (tree &t : *cleanups)
9401 : 18 : t = build3 (COND_EXPR, void_type_node,
9402 : : guard, t, void_node);
9403 : 17171 : if (cleanup)
9404 : 25 : cleanup = build3 (COND_EXPR, void_type_node,
9405 : : guard, cleanup, void_node);
9406 : : }
9407 : 17171 : unsigned before = stmt_list_stack->length ();
9408 : 17171 : cp_finish_decomp (decl, decomp);
9409 : 17171 : decomp = NULL;
9410 : 17171 : unsigned n_extra_cleanups = stmt_list_stack->length () - before;
9411 : 17171 : sl = pop_stmt_list (sl);
9412 : 17171 : if (n_extra_cleanups)
9413 : : {
9414 : : /* If cp_finish_decomp needs any cleanups, such as for
9415 : : extend_ref_init_temps created vars, pop_stmt_list
9416 : : popped that all, so push those extra cleanups around
9417 : : the whole sequence with a guard variable. */
9418 : 15 : gcc_assert (TREE_CODE (sl) == STATEMENT_LIST);
9419 : 15 : guard = get_internal_target_expr (integer_zero_node);
9420 : 15 : add_stmt (guard);
9421 : 15 : guard = TARGET_EXPR_SLOT (guard);
9422 : 63 : for (unsigned i = 0; i < n_extra_cleanups; ++i)
9423 : : {
9424 : 48 : tree_stmt_iterator tsi = tsi_last (sl);
9425 : 48 : gcc_assert (!tsi_end_p (tsi));
9426 : 48 : tree last = tsi_stmt (tsi);
9427 : 48 : gcc_assert (TREE_CODE (last) == CLEANUP_STMT
9428 : : && !CLEANUP_EH_ONLY (last));
9429 : 48 : tree cst = build_int_cst (integer_type_node, i + 1);
9430 : 96 : tree cl = build3 (COND_EXPR, void_type_node,
9431 : : build2 (GE_EXPR, boolean_type_node,
9432 : : guard, cst),
9433 : 48 : CLEANUP_EXPR (last), void_node);
9434 : 48 : extra_cleanups.safe_push (cl);
9435 : 48 : tsi_link_before (&tsi, build2 (MODIFY_EXPR,
9436 : : integer_type_node,
9437 : : guard, cst),
9438 : : TSI_SAME_STMT);
9439 : 48 : tree sl2 = CLEANUP_BODY (last);
9440 : 48 : gcc_assert (TREE_CODE (sl2) == STATEMENT_LIST);
9441 : 48 : tsi_link_before (&tsi, sl2, TSI_SAME_STMT);
9442 : 48 : tsi_delink (&tsi);
9443 : : }
9444 : : }
9445 : 17171 : decomp_init = maybe_cleanup_point_expr_void (sl);
9446 : 17171 : if (cleanup)
9447 : 25 : finish_decl_cleanup (decl, cleanup);
9448 : : }
9449 : : }
9450 : :
9451 : : /* If a variable is defined, and then a subsequent
9452 : : definition with external linkage is encountered, we will
9453 : : get here twice for the same variable. We want to avoid
9454 : : calling expand_static_init more than once. For variables
9455 : : that are not static data members, we can call
9456 : : expand_static_init only when we actually process the
9457 : : initializer. It is not legal to redeclare a static data
9458 : : member, so this issue does not arise in that case. */
9459 : 16153504 : else if (var_definition_p && TREE_STATIC (decl))
9460 : : {
9461 : 14380428 : if (decomp && DECL_FUNCTION_SCOPE_P (decl))
9462 : : {
9463 : 54 : tree sl = push_stmt_list ();
9464 : 54 : auto saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
9465 : 54 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
9466 : 54 : expand_static_init (decl, init);
9467 : 54 : current_stmt_tree ()->stmts_are_full_exprs_p
9468 : 54 : = saved_stmts_are_full_exprs_p;
9469 : 54 : cp_finish_decomp (decl, decomp);
9470 : 54 : decomp = NULL;
9471 : 54 : sl = pop_stmt_list (sl);
9472 : 54 : sl = maybe_cleanup_point_expr_void (sl);
9473 : 54 : add_stmt (sl);
9474 : : }
9475 : : else
9476 : 14380374 : expand_static_init (decl, init);
9477 : : }
9478 : : }
9479 : :
9480 : : /* If a CLEANUP_STMT was created to destroy a temporary bound to a
9481 : : reference, insert it in the statement-tree now. */
9482 : 101309983 : if (cleanups)
9483 : : {
9484 : 37609002 : for (tree t : *cleanups)
9485 : : {
9486 : 5677 : push_cleanup (NULL_TREE, t, false);
9487 : : /* As in initialize_local_var. */
9488 : 5677 : wrap_temporary_cleanups (init, t);
9489 : : }
9490 : 37603325 : release_tree_vector (cleanups);
9491 : : }
9492 : :
9493 : 101310061 : for (tree t : &extra_cleanups)
9494 : 48 : push_cleanup (NULL_TREE, t, false);
9495 : :
9496 : 101309983 : if (decomp_init)
9497 : 17171 : add_stmt (decomp_init);
9498 : :
9499 : 101309983 : if (decomp
9500 : 100 : && var_definition_p
9501 : 100 : && TREE_STATIC (decl)
9502 : 101310083 : && !DECL_FUNCTION_SCOPE_P (decl))
9503 : : {
9504 : 100 : tree &aggregates3 = (CP_DECL_THREAD_LOCAL_P (decl)
9505 : 100 : ? tls_aggregates : static_aggregates);
9506 : 100 : tree aggregates2 = aggregates3;
9507 : 100 : if (aggregates2 != aggregates1)
9508 : : {
9509 : 62 : cp_finish_decomp (decl, decomp);
9510 : 62 : decomp = NULL;
9511 : 62 : if (aggregates3 != aggregates2)
9512 : : {
9513 : : /* If there are dynamic initializers for the structured
9514 : : binding base or associated extended ref temps and also
9515 : : dynamic initializers for the structured binding non-base
9516 : : vars, mark them. */
9517 : 292 : for (tree t = aggregates3; t != aggregates2; t = TREE_CHAIN (t))
9518 : 233 : STATIC_INIT_DECOMP_NONBASE_P (t) = 1;
9519 : 140 : for (tree t = aggregates2; t != aggregates1; t = TREE_CHAIN (t))
9520 : 81 : STATIC_INIT_DECOMP_BASE_P (t) = 1;
9521 : : }
9522 : : }
9523 : : }
9524 : :
9525 : 101309983 : if (was_readonly)
9526 : 221480 : TREE_READONLY (decl) = 1;
9527 : :
9528 : 101309983 : if (flag_openmp
9529 : 246209 : && VAR_P (decl)
9530 : 101397503 : && lookup_attribute ("omp declare target implicit",
9531 : 87520 : DECL_ATTRIBUTES (decl)))
9532 : : {
9533 : 52 : DECL_ATTRIBUTES (decl)
9534 : 52 : = remove_attribute ("omp declare target implicit",
9535 : 52 : DECL_ATTRIBUTES (decl));
9536 : 52 : complete_type (TREE_TYPE (decl));
9537 : 52 : if (!omp_mappable_type (TREE_TYPE (decl)))
9538 : : {
9539 : 30 : auto_diagnostic_group d;
9540 : 30 : error ("%q+D in declare target directive does not have mappable"
9541 : : " type", decl);
9542 : 30 : if (TREE_TYPE (decl) != error_mark_node
9543 : 30 : && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
9544 : 30 : cxx_incomplete_type_inform (TREE_TYPE (decl));
9545 : 30 : }
9546 : 22 : else if (!lookup_attribute ("omp declare target",
9547 : 22 : DECL_ATTRIBUTES (decl))
9548 : 44 : && !lookup_attribute ("omp declare target link",
9549 : 22 : DECL_ATTRIBUTES (decl)))
9550 : : {
9551 : 22 : DECL_ATTRIBUTES (decl)
9552 : 22 : = tree_cons (get_identifier ("omp declare target"),
9553 : 22 : NULL_TREE, DECL_ATTRIBUTES (decl));
9554 : 22 : symtab_node *node = symtab_node::get (decl);
9555 : 22 : if (node != NULL)
9556 : : {
9557 : 19 : node->offloadable = 1;
9558 : 19 : if (ENABLE_OFFLOADING)
9559 : : {
9560 : : g->have_offload = true;
9561 : : if (is_a <varpool_node *> (node))
9562 : : vec_safe_push (offload_vars, decl);
9563 : : }
9564 : : }
9565 : : }
9566 : : }
9567 : :
9568 : : /* This is the last point we can lower alignment so give the target the
9569 : : chance to do so. */
9570 : 101309983 : if (VAR_P (decl)
9571 : 42819944 : && !is_global_var (decl)
9572 : 123515384 : && !DECL_HARD_REGISTER (decl))
9573 : 22205351 : targetm.lower_local_decl_alignment (decl);
9574 : :
9575 : 101309983 : invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl);
9576 : 265190219 : }
9577 : :
9578 : : /* For class TYPE return itself or some its bases that contain
9579 : : any direct non-static data members. Return error_mark_node if an
9580 : : error has been diagnosed. */
9581 : :
9582 : : static tree
9583 : 19543 : find_decomp_class_base (location_t loc, tree type, tree ret)
9584 : : {
9585 : 39086 : if (LAMBDA_TYPE_P (type))
9586 : : {
9587 : 9 : auto_diagnostic_group d;
9588 : 9 : error_at (loc, "cannot decompose lambda closure type %qT", type);
9589 : 9 : inform (location_of (type), "lambda declared here");
9590 : 9 : return error_mark_node;
9591 : 9 : }
9592 : :
9593 : 19534 : bool member_seen = false;
9594 : 273819 : for (tree field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
9595 : 469253 : if (TREE_CODE (field) != FIELD_DECL
9596 : 39465 : || DECL_ARTIFICIAL (field)
9597 : 293689 : || DECL_UNNAMED_BIT_FIELD (field))
9598 : 214947 : continue;
9599 : 39359 : else if (ret)
9600 : : return type;
9601 : 39342 : else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
9602 : : {
9603 : 2 : auto_diagnostic_group d;
9604 : 2 : if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
9605 : 1 : error_at (loc, "cannot decompose class type %qT because it has an "
9606 : : "anonymous struct member", type);
9607 : : else
9608 : 1 : error_at (loc, "cannot decompose class type %qT because it has an "
9609 : : "anonymous union member", type);
9610 : 2 : inform (DECL_SOURCE_LOCATION (field), "declared here");
9611 : 2 : return error_mark_node;
9612 : 2 : }
9613 : 39340 : else if (!accessible_p (type, field, true))
9614 : : {
9615 : 2 : auto_diagnostic_group d;
9616 : 2 : error_at (loc, "cannot decompose inaccessible member %qD of %qT",
9617 : : field, type);
9618 : 2 : inform (DECL_SOURCE_LOCATION (field),
9619 : 2 : TREE_PRIVATE (field)
9620 : : ? G_("declared private here")
9621 : : : G_("declared protected here"));
9622 : 2 : return error_mark_node;
9623 : 2 : }
9624 : : else
9625 : : member_seen = true;
9626 : :
9627 : 19513 : tree base_binfo, binfo;
9628 : 19513 : tree orig_ret = ret;
9629 : 19513 : int i;
9630 : 19513 : if (member_seen)
9631 : 19464 : ret = type;
9632 : 19568 : for (binfo = TYPE_BINFO (type), i = 0;
9633 : 19568 : BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9634 : : {
9635 : 66 : auto_diagnostic_group d;
9636 : 66 : tree t = find_decomp_class_base (loc, TREE_TYPE (base_binfo), ret);
9637 : 66 : if (t == error_mark_node)
9638 : : {
9639 : 3 : inform (location_of (type), "in base class of %qT", type);
9640 : 3 : return error_mark_node;
9641 : : }
9642 : 63 : if (t != NULL_TREE && t != ret)
9643 : : {
9644 : 36 : if (ret == type)
9645 : : {
9646 : 4 : error_at (loc, "cannot decompose class type %qT: both it and "
9647 : : "its base class %qT have non-static data members",
9648 : : type, t);
9649 : 4 : return error_mark_node;
9650 : : }
9651 : 32 : else if (orig_ret != NULL_TREE)
9652 : : return t;
9653 : 32 : else if (ret != NULL_TREE)
9654 : : {
9655 : 4 : error_at (loc, "cannot decompose class type %qT: its base "
9656 : : "classes %qT and %qT have non-static data "
9657 : : "members", type, ret, t);
9658 : 4 : return error_mark_node;
9659 : : }
9660 : : else
9661 : : ret = t;
9662 : : }
9663 : 66 : }
9664 : : return ret;
9665 : : }
9666 : :
9667 : : /* Return std::tuple_size<TYPE>::value. */
9668 : :
9669 : : static tree
9670 : 56621 : get_tuple_size (tree type)
9671 : : {
9672 : 56621 : tree args = make_tree_vec (1);
9673 : 56621 : TREE_VEC_ELT (args, 0) = type;
9674 : 56621 : tree inst = lookup_template_class (tuple_size_identifier, args,
9675 : : /*in_decl*/NULL_TREE,
9676 : : /*context*/std_node,
9677 : : tf_none);
9678 : 56621 : inst = complete_type (inst);
9679 : 56621 : if (inst == error_mark_node
9680 : 56019 : || !COMPLETE_TYPE_P (inst)
9681 : 93750 : || !CLASS_TYPE_P (type))
9682 : : return NULL_TREE;
9683 : 37129 : tree val = lookup_qualified_name (inst, value_identifier,
9684 : : LOOK_want::NORMAL, /*complain*/false);
9685 : 37129 : if (val == error_mark_node)
9686 : : return NULL_TREE;
9687 : 37123 : if (VAR_P (val) || TREE_CODE (val) == CONST_DECL)
9688 : 37123 : val = maybe_constant_value (val);
9689 : 37123 : if (TREE_CODE (val) == INTEGER_CST)
9690 : : return val;
9691 : : else
9692 : 0 : return error_mark_node;
9693 : : }
9694 : :
9695 : : /* Return std::tuple_element<I,TYPE>::type. */
9696 : :
9697 : : static tree
9698 : 39865 : get_tuple_element_type (tree type, unsigned i)
9699 : : {
9700 : 39865 : tree args = make_tree_vec (2);
9701 : 39865 : TREE_VEC_ELT (args, 0) = build_int_cst (integer_type_node, i);
9702 : 39865 : TREE_VEC_ELT (args, 1) = type;
9703 : 39865 : tree inst = lookup_template_class (tuple_element_identifier, args,
9704 : : /*in_decl*/NULL_TREE,
9705 : : /*context*/std_node,
9706 : : tf_warning_or_error);
9707 : 39865 : return make_typename_type (inst, type_identifier,
9708 : 39865 : none_type, tf_warning_or_error);
9709 : : }
9710 : :
9711 : : /* Return e.get<i>() or get<i>(e). */
9712 : :
9713 : : static tree
9714 : 39874 : get_tuple_decomp_init (tree decl, unsigned i)
9715 : : {
9716 : 39874 : tree targs = make_tree_vec (1);
9717 : 39874 : TREE_VEC_ELT (targs, 0) = build_int_cst (integer_type_node, i);
9718 : :
9719 : 39874 : tree etype = TREE_TYPE (decl);
9720 : 39874 : tree e = convert_from_reference (decl);
9721 : :
9722 : : /* [The id-expression] e is an lvalue if the type of the entity e is an
9723 : : lvalue reference and an xvalue otherwise. */
9724 : 39874 : if (!TYPE_REF_P (etype)
9725 : 39874 : || TYPE_REF_IS_RVALUE (etype))
9726 : 38754 : e = move (e);
9727 : :
9728 : 39874 : tree fns = lookup_qualified_name (TREE_TYPE (e), get__identifier,
9729 : : LOOK_want::NORMAL, /*complain*/false);
9730 : 39874 : bool use_member_get = false;
9731 : :
9732 : : /* To use a member get, member lookup must find at least one
9733 : : declaration that is a function template
9734 : : whose first template parameter is a non-type parameter. */
9735 : 118422 : for (lkp_iterator iter (MAYBE_BASELINK_FUNCTIONS (fns)); iter; ++iter)
9736 : : {
9737 : 39874 : tree fn = *iter;
9738 : 39874 : if (TREE_CODE (fn) == TEMPLATE_DECL)
9739 : : {
9740 : 1203 : tree tparms = DECL_TEMPLATE_PARMS (fn);
9741 : 1203 : tree parm = TREE_VEC_ELT (INNERMOST_TEMPLATE_PARMS (tparms), 0);
9742 : 1203 : if (TREE_CODE (TREE_VALUE (parm)) == PARM_DECL)
9743 : : {
9744 : : use_member_get = true;
9745 : : break;
9746 : : }
9747 : : }
9748 : : }
9749 : :
9750 : 39874 : if (use_member_get)
9751 : : {
9752 : 1200 : fns = lookup_template_function (fns, targs);
9753 : 1200 : return build_new_method_call (e, fns, /*args*/NULL,
9754 : : /*path*/NULL_TREE, LOOKUP_NORMAL,
9755 : 1200 : /*fn_p*/NULL, tf_warning_or_error);
9756 : : }
9757 : : else
9758 : : {
9759 : 38674 : releasing_vec args (make_tree_vector_single (e));
9760 : 38674 : fns = lookup_template_function (get__identifier, targs);
9761 : 38674 : fns = perform_koenig_lookup (fns, args, tf_warning_or_error);
9762 : 38674 : return finish_call_expr (fns, &args, /*novirt*/false,
9763 : : /*koenig*/true, tf_warning_or_error);
9764 : 38674 : }
9765 : : }
9766 : :
9767 : : /* It's impossible to recover the decltype of a tuple decomposition variable
9768 : : based on the actual type of the variable, so store it in a hash table. */
9769 : :
9770 : : static GTY((cache)) decl_tree_cache_map *decomp_type_table;
9771 : :
9772 : : tree
9773 : 54 : lookup_decomp_type (tree v)
9774 : : {
9775 : 54 : if (decomp_type_table)
9776 : 51 : if (tree *slot = decomp_type_table->get (v))
9777 : 51 : return *slot;
9778 : : return NULL_TREE;
9779 : : }
9780 : :
9781 : : /* Mangle a decomposition declaration if needed. Arguments like
9782 : : in cp_finish_decomp. */
9783 : :
9784 : : static void
9785 : 32541 : cp_maybe_mangle_decomp (tree decl, cp_decomp *decomp)
9786 : : {
9787 : 32541 : if (!processing_template_decl
9788 : 32541 : && !error_operand_p (decl)
9789 : 65082 : && TREE_STATIC (decl))
9790 : : {
9791 : 377 : auto_vec<tree, 16> v;
9792 : 377 : v.safe_grow (decomp->count, true);
9793 : 377 : tree d = decomp->decl;
9794 : 1348 : for (unsigned int i = 0; i < decomp->count; i++, d = DECL_CHAIN (d))
9795 : 971 : v[decomp->count - i - 1] = d;
9796 : 377 : if (DECL_FUNCTION_SCOPE_P (decl))
9797 : : {
9798 : : size_t sz = 3;
9799 : 453 : for (unsigned int i = 0; i < decomp->count; ++i)
9800 : 330 : sz += IDENTIFIER_LENGTH (DECL_NAME (v[i])) + 1;
9801 : 123 : char *name = XALLOCAVEC (char, sz);
9802 : 123 : name[0] = 'D';
9803 : 123 : name[1] = 'C';
9804 : 123 : char *p = name + 2;
9805 : 453 : for (unsigned int i = 0; i < decomp->count; ++i)
9806 : : {
9807 : 330 : size_t len = IDENTIFIER_LENGTH (DECL_NAME (v[i]));
9808 : 330 : *p++ = ' ';
9809 : 330 : memcpy (p, IDENTIFIER_POINTER (DECL_NAME (v[i])), len);
9810 : 330 : p += len;
9811 : : }
9812 : 123 : *p = '\0';
9813 : 123 : determine_local_discriminator (decl, get_identifier (name));
9814 : : }
9815 : 377 : SET_DECL_ASSEMBLER_NAME (decl, mangle_decomp (decl, v));
9816 : 377 : maybe_apply_pragma_weak (decl);
9817 : 377 : }
9818 : 32541 : }
9819 : :
9820 : : /* Finish a decomposition declaration. DECL is the underlying declaration
9821 : : "e", FIRST is the head of a chain of decls for the individual identifiers
9822 : : chained through DECL_CHAIN in reverse order and COUNT is the number of
9823 : : those decls. If TEST_P is true, return true if any code would need to be
9824 : : actually emitted but don't emit it. Return false otherwise. */
9825 : :
9826 : : bool
9827 : 119602 : cp_finish_decomp (tree decl, cp_decomp *decomp, bool test_p)
9828 : : {
9829 : 119602 : tree first = decomp->decl;
9830 : 119602 : unsigned count = decomp->count;
9831 : 119602 : if (error_operand_p (decl))
9832 : : {
9833 : 54 : error_out:
9834 : 436 : while (count--)
9835 : : {
9836 : 274 : TREE_TYPE (first) = error_mark_node;
9837 : 274 : if (DECL_HAS_VALUE_EXPR_P (first))
9838 : : {
9839 : 9 : SET_DECL_VALUE_EXPR (first, NULL_TREE);
9840 : 9 : DECL_HAS_VALUE_EXPR_P (first) = 0;
9841 : : }
9842 : 274 : first = DECL_CHAIN (first);
9843 : : }
9844 : 162 : if (DECL_P (decl) && DECL_NAMESPACE_SCOPE_P (decl))
9845 : 51 : SET_DECL_ASSEMBLER_NAME (decl, get_identifier ("<decomp>"));
9846 : 162 : return false;
9847 : : }
9848 : :
9849 : 119548 : location_t loc = DECL_SOURCE_LOCATION (decl);
9850 : 119548 : if (type_dependent_expression_p (decl)
9851 : : /* This happens for range for when not in templates.
9852 : : Still add the DECL_VALUE_EXPRs for later processing. */
9853 : 119548 : || (!processing_template_decl
9854 : 50017 : && type_uses_auto (TREE_TYPE (decl))))
9855 : : {
9856 : 187847 : for (unsigned int i = 0; i < count; i++)
9857 : : {
9858 : 125313 : if (!DECL_HAS_VALUE_EXPR_P (first))
9859 : : {
9860 : 125313 : tree v = build_nt (ARRAY_REF, decl,
9861 : 125313 : size_int (count - i - 1),
9862 : : NULL_TREE, NULL_TREE);
9863 : 125313 : SET_DECL_VALUE_EXPR (first, v);
9864 : 125313 : DECL_HAS_VALUE_EXPR_P (first) = 1;
9865 : : }
9866 : 125313 : if (processing_template_decl)
9867 : 124835 : fit_decomposition_lang_decl (first, decl);
9868 : 125313 : first = DECL_CHAIN (first);
9869 : : }
9870 : : return false;
9871 : : }
9872 : :
9873 : 57014 : auto_vec<tree, 16> v;
9874 : 57014 : v.safe_grow (count, true);
9875 : 57014 : tree d = first;
9876 : 172168 : for (unsigned int i = 0; i < count; i++, d = DECL_CHAIN (d))
9877 : : {
9878 : 115154 : v[count - i - 1] = d;
9879 : 115154 : fit_decomposition_lang_decl (d, decl);
9880 : : }
9881 : :
9882 : 57014 : tree type = TREE_TYPE (decl);
9883 : 57014 : tree dexp = decl;
9884 : :
9885 : 57014 : if (TYPE_REF_P (type))
9886 : : {
9887 : 1176 : dexp = convert_from_reference (dexp);
9888 : 1176 : type = complete_type (TREE_TYPE (type));
9889 : 1176 : if (type == error_mark_node)
9890 : 108 : goto error_out;
9891 : 1176 : if (!COMPLETE_TYPE_P (type))
9892 : : {
9893 : 3 : error_at (loc, "structured binding refers to incomplete type %qT",
9894 : : type);
9895 : 3 : goto error_out;
9896 : : }
9897 : : }
9898 : :
9899 : 57011 : tree eltype = NULL_TREE;
9900 : 57011 : unsigned HOST_WIDE_INT eltscnt = 0;
9901 : 57011 : if (TREE_CODE (type) == ARRAY_TYPE)
9902 : : {
9903 : 366 : tree nelts;
9904 : 366 : nelts = array_type_nelts_top (type);
9905 : 366 : if (nelts == error_mark_node)
9906 : 0 : goto error_out;
9907 : 366 : if (DECL_DECOMP_BASE (decl))
9908 : : {
9909 : 9 : error_at (loc, "array initializer for structured binding "
9910 : : "declaration in condition");
9911 : 9 : goto error_out;
9912 : : }
9913 : 357 : if (!tree_fits_uhwi_p (nelts))
9914 : : {
9915 : 0 : error_at (loc, "cannot decompose variable length array %qT", type);
9916 : 0 : goto error_out;
9917 : : }
9918 : 357 : eltscnt = tree_to_uhwi (nelts);
9919 : 357 : if (count != eltscnt)
9920 : : {
9921 : 8 : cnt_mismatch:
9922 : 23 : auto_diagnostic_group d;
9923 : 23 : if (count > eltscnt)
9924 : 12 : error_n (loc, count,
9925 : : "%u name provided for structured binding",
9926 : : "%u names provided for structured binding", count);
9927 : : else
9928 : 11 : error_n (loc, count,
9929 : : "only %u name provided for structured binding",
9930 : : "only %u names provided for structured binding", count);
9931 : 23 : inform_n (loc, eltscnt,
9932 : : "while %qT decomposes into %wu element",
9933 : : "while %qT decomposes into %wu elements",
9934 : : type, eltscnt);
9935 : 23 : goto error_out;
9936 : : }
9937 : 349 : eltype = TREE_TYPE (type);
9938 : 1188 : for (unsigned int i = 0; i < count; i++)
9939 : : {
9940 : 839 : TREE_TYPE (v[i]) = eltype;
9941 : 839 : layout_decl (v[i], 0);
9942 : 839 : if (processing_template_decl)
9943 : 60 : continue;
9944 : 779 : tree t = unshare_expr (dexp);
9945 : 779 : t = build4 (ARRAY_REF, eltype, t, size_int (i), NULL_TREE, NULL_TREE);
9946 : 779 : SET_DECL_VALUE_EXPR (v[i], t);
9947 : 779 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
9948 : : }
9949 : : }
9950 : : /* 2 GNU extensions. */
9951 : 56645 : else if (TREE_CODE (type) == COMPLEX_TYPE)
9952 : : {
9953 : 15 : eltscnt = 2;
9954 : 15 : if (count != eltscnt)
9955 : 0 : goto cnt_mismatch;
9956 : 15 : eltype = cp_build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type));
9957 : 45 : for (unsigned int i = 0; i < count; i++)
9958 : : {
9959 : 30 : TREE_TYPE (v[i]) = eltype;
9960 : 30 : layout_decl (v[i], 0);
9961 : 30 : if (processing_template_decl)
9962 : 0 : continue;
9963 : 30 : tree t = unshare_expr (dexp);
9964 : 45 : t = build1 (i ? IMAGPART_EXPR : REALPART_EXPR, eltype, t);
9965 : 30 : SET_DECL_VALUE_EXPR (v[i], t);
9966 : 30 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
9967 : : }
9968 : : }
9969 : 56630 : else if (TREE_CODE (type) == VECTOR_TYPE)
9970 : : {
9971 : 9 : if (!TYPE_VECTOR_SUBPARTS (type).is_constant (&eltscnt))
9972 : : {
9973 : : error_at (loc, "cannot decompose variable length vector %qT", type);
9974 : : goto error_out;
9975 : : }
9976 : 9 : if (count != eltscnt)
9977 : 0 : goto cnt_mismatch;
9978 : 9 : eltype = cp_build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type));
9979 : 45 : for (unsigned int i = 0; i < count; i++)
9980 : : {
9981 : 36 : TREE_TYPE (v[i]) = eltype;
9982 : 36 : layout_decl (v[i], 0);
9983 : 36 : if (processing_template_decl)
9984 : 0 : continue;
9985 : 36 : tree t = unshare_expr (dexp);
9986 : 36 : convert_vector_to_array_for_subscript (DECL_SOURCE_LOCATION (v[i]),
9987 : 36 : &t, size_int (i));
9988 : 36 : t = build4 (ARRAY_REF, eltype, t, size_int (i), NULL_TREE, NULL_TREE);
9989 : 36 : SET_DECL_VALUE_EXPR (v[i], t);
9990 : 36 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
9991 : : }
9992 : : }
9993 : 56621 : else if (tree tsize = get_tuple_size (type))
9994 : : {
9995 : 37123 : if (tsize == error_mark_node)
9996 : : {
9997 : 0 : error_at (loc, "%<std::tuple_size<%T>::value%> is not an integral "
9998 : : "constant expression", type);
9999 : 0 : goto error_out;
10000 : : }
10001 : 37123 : if (!tree_fits_uhwi_p (tsize))
10002 : : {
10003 : 12 : auto_diagnostic_group d;
10004 : 12 : error_n (loc, count,
10005 : : "%u name provided for structured binding",
10006 : : "%u names provided for structured binding", count);
10007 : 12 : inform (loc, "while %qT decomposes into %E elements",
10008 : : type, tsize);
10009 : 12 : goto error_out;
10010 : 12 : }
10011 : 37111 : eltscnt = tree_to_uhwi (tsize);
10012 : 37111 : if (count != eltscnt)
10013 : 3 : goto cnt_mismatch;
10014 : 37108 : if (test_p)
10015 : 56906 : return true;
10016 : 19783 : if (!processing_template_decl && DECL_DECOMP_BASE (decl))
10017 : : {
10018 : : /* For structured bindings used in conditions we need to evaluate
10019 : : the conversion of decl (aka e in the standard) to bool or
10020 : : integral/enumeral type (the latter for switch conditions)
10021 : : before the get methods. */
10022 : 78 : tree cond = convert_from_reference (decl);
10023 : 78 : if (integer_onep (DECL_DECOMP_BASE (decl)))
10024 : : /* switch condition. */
10025 : 18 : cond = build_expr_type_conversion (WANT_INT | WANT_ENUM,
10026 : : cond, true);
10027 : : else
10028 : : /* if/while/for condition. */
10029 : 60 : cond = contextual_conv_bool (cond, tf_warning_or_error);
10030 : 78 : if (cond && !error_operand_p (cond))
10031 : : {
10032 : : /* Wrap that value into a TARGET_EXPR, emit it right
10033 : : away and save for later uses in the cp_parse_condition
10034 : : or its instantiation. */
10035 : 78 : cond = get_internal_target_expr (cond);
10036 : 78 : add_stmt (cond);
10037 : 78 : DECL_DECOMP_BASE (decl) = cond;
10038 : : }
10039 : : }
10040 : 19783 : int save_read = DECL_READ_P (decl);
10041 : 59636 : for (unsigned i = 0; i < count; ++i)
10042 : : {
10043 : 39874 : location_t sloc = input_location;
10044 : 39874 : location_t dloc = DECL_SOURCE_LOCATION (v[i]);
10045 : :
10046 : 39874 : input_location = dloc;
10047 : 39874 : tree init = get_tuple_decomp_init (decl, i);
10048 : 39874 : tree eltype = (init == error_mark_node ? error_mark_node
10049 : 39865 : : get_tuple_element_type (type, i));
10050 : 39874 : input_location = sloc;
10051 : :
10052 : 39874 : if (VOID_TYPE_P (eltype))
10053 : : {
10054 : 3 : error ("%<std::tuple_element<%u, %T>::type%> is %<void%>",
10055 : : i, type);
10056 : 3 : eltype = error_mark_node;
10057 : : }
10058 : 39874 : if (init == error_mark_node || eltype == error_mark_node)
10059 : : {
10060 : 21 : inform (dloc, "in initialization of structured binding "
10061 : 21 : "variable %qD", v[i]);
10062 : 21 : goto error_out;
10063 : : }
10064 : : /* Save the decltype away before reference collapse. */
10065 : 39853 : hash_map_safe_put<hm_ggc> (decomp_type_table, v[i], eltype);
10066 : 39853 : eltype = cp_build_reference_type (eltype, !lvalue_p (init));
10067 : 39853 : TREE_TYPE (v[i]) = eltype;
10068 : 39853 : layout_decl (v[i], 0);
10069 : 39853 : if (DECL_HAS_VALUE_EXPR_P (v[i]))
10070 : : {
10071 : : /* In this case the names are variables, not just proxies. */
10072 : 202 : SET_DECL_VALUE_EXPR (v[i], NULL_TREE);
10073 : 202 : DECL_HAS_VALUE_EXPR_P (v[i]) = 0;
10074 : : }
10075 : 39853 : if (!processing_template_decl)
10076 : : {
10077 : 34863 : copy_linkage (v[i], decl);
10078 : 34863 : cp_finish_decl (v[i], init, /*constexpr*/false,
10079 : : /*asm*/NULL_TREE, LOOKUP_NORMAL);
10080 : : }
10081 : : }
10082 : : /* Ignore reads from the underlying decl performed during initialization
10083 : : of the individual variables. If those will be read, we'll mark
10084 : : the underlying decl as read at that point. */
10085 : 19762 : DECL_READ_P (decl) = save_read;
10086 : : }
10087 : 19498 : else if (TREE_CODE (type) == UNION_TYPE)
10088 : : {
10089 : 3 : error_at (loc, "cannot decompose union type %qT", type);
10090 : 3 : goto error_out;
10091 : : }
10092 : 19495 : else if (!CLASS_TYPE_P (type))
10093 : : {
10094 : 16 : error_at (loc, "cannot decompose non-array non-class type %qT", type);
10095 : 16 : goto error_out;
10096 : : }
10097 : 19479 : else if (processing_template_decl && complete_type (type) == error_mark_node)
10098 : 0 : goto error_out;
10099 : 19479 : else if (processing_template_decl && !COMPLETE_TYPE_P (type))
10100 : 2 : pedwarn (loc, 0, "structured binding refers to incomplete class type %qT",
10101 : : type);
10102 : : else
10103 : : {
10104 : 19477 : tree btype = find_decomp_class_base (loc, type, NULL_TREE);
10105 : 19477 : if (btype == error_mark_node)
10106 : 21 : goto error_out;
10107 : 19456 : else if (btype == NULL_TREE)
10108 : : {
10109 : 0 : error_at (loc, "cannot decompose class type %qT without non-static "
10110 : : "data members", type);
10111 : 0 : goto error_out;
10112 : : }
10113 : 272698 : for (tree field = TYPE_FIELDS (btype); field; field = TREE_CHAIN (field))
10114 : 467157 : if (TREE_CODE (field) != FIELD_DECL
10115 : 39343 : || DECL_ARTIFICIAL (field)
10116 : 292581 : || DECL_UNNAMED_BIT_FIELD (field))
10117 : 213915 : continue;
10118 : : else
10119 : 39327 : eltscnt++;
10120 : 19456 : if (count != eltscnt)
10121 : 12 : goto cnt_mismatch;
10122 : 19444 : tree t = dexp;
10123 : 19444 : if (type != btype)
10124 : : {
10125 : 18 : t = convert_to_base (t, btype, /*check_access*/true,
10126 : : /*nonnull*/false, tf_warning_or_error);
10127 : 18 : type = btype;
10128 : : }
10129 : 19444 : unsigned int i = 0;
10130 : 272505 : for (tree field = TYPE_FIELDS (btype); field; field = TREE_CHAIN (field))
10131 : 466820 : if (TREE_CODE (field) != FIELD_DECL
10132 : 39318 : || DECL_ARTIFICIAL (field)
10133 : 292375 : || DECL_UNNAMED_BIT_FIELD (field))
10134 : 213759 : continue;
10135 : : else
10136 : : {
10137 : 39302 : tree tt = finish_non_static_data_member (field, unshare_expr (t),
10138 : : NULL_TREE);
10139 : 39302 : if (REFERENCE_REF_P (tt))
10140 : 30 : tt = TREE_OPERAND (tt, 0);
10141 : 39302 : TREE_TYPE (v[i]) = TREE_TYPE (tt);
10142 : 39302 : layout_decl (v[i], 0);
10143 : 39302 : if (!processing_template_decl)
10144 : : {
10145 : 29975 : SET_DECL_VALUE_EXPR (v[i], tt);
10146 : 29975 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
10147 : : }
10148 : 39302 : i++;
10149 : : }
10150 : : }
10151 : 39581 : if (processing_template_decl)
10152 : : {
10153 : 21518 : for (unsigned int i = 0; i < count; i++)
10154 : 14379 : if (!DECL_HAS_VALUE_EXPR_P (v[i]))
10155 : : {
10156 : 14244 : tree a = build_nt (ARRAY_REF, decl, size_int (i),
10157 : : NULL_TREE, NULL_TREE);
10158 : 14244 : SET_DECL_VALUE_EXPR (v[i], a);
10159 : 14244 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
10160 : : }
10161 : : }
10162 : : return false;
10163 : : }
10164 : :
10165 : : /* Returns a declaration for a VAR_DECL as if:
10166 : :
10167 : : extern "C" TYPE NAME;
10168 : :
10169 : : had been seen. Used to create compiler-generated global
10170 : : variables. */
10171 : :
10172 : : static tree
10173 : 2071 : declare_global_var (tree name, tree type)
10174 : : {
10175 : 2071 : auto cookie = push_abi_namespace (global_namespace);
10176 : 2071 : tree decl = build_decl (input_location, VAR_DECL, name, type);
10177 : 2071 : TREE_PUBLIC (decl) = 1;
10178 : 2071 : DECL_EXTERNAL (decl) = 1;
10179 : 2071 : DECL_ARTIFICIAL (decl) = 1;
10180 : 2071 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
10181 : : /* If the user has explicitly declared this variable (perhaps
10182 : : because the code we are compiling is part of a low-level runtime
10183 : : library), then it is possible that our declaration will be merged
10184 : : with theirs by pushdecl. */
10185 : 2071 : decl = pushdecl (decl);
10186 : 2071 : cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
10187 : 2071 : pop_abi_namespace (cookie, global_namespace);
10188 : :
10189 : 2071 : return decl;
10190 : : }
10191 : :
10192 : : /* Returns the type for the argument to "atexit" corresponding to the function
10193 : : to be called when the program exits. */
10194 : :
10195 : : static tree
10196 : 24 : get_atexit_fn_ptr_type ()
10197 : : {
10198 : 24 : if (!atexit_fn_ptr_type_node)
10199 : : {
10200 : 12 : tree fn_type = build_function_type_list (void_type_node, NULL_TREE);
10201 : 12 : atexit_fn_ptr_type_node = build_pointer_type (fn_type);
10202 : : }
10203 : :
10204 : 24 : return atexit_fn_ptr_type_node;
10205 : : }
10206 : :
10207 : : /* Returns the type for the argument to "__cxa_atexit", "__cxa_thread_atexit"
10208 : : or "__cxa_throw" corresponding to the destructor to be called when the
10209 : : program exits. */
10210 : :
10211 : : tree
10212 : 17546 : get_cxa_atexit_fn_ptr_type ()
10213 : : {
10214 : 17546 : if (!cleanup_type)
10215 : : {
10216 : 13333 : tree fntype = build_function_type_list (void_type_node,
10217 : : ptr_type_node, NULL_TREE);
10218 : 13333 : fntype = targetm.cxx.adjust_cdtor_callabi_fntype (fntype);
10219 : 13333 : cleanup_type = build_pointer_type (fntype);
10220 : : }
10221 : :
10222 : 17546 : return cleanup_type;
10223 : : }
10224 : :
10225 : : /* Returns a pointer to the `atexit' function. Note that if
10226 : : FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
10227 : : `__cxa_atexit' function specified in the IA64 C++ ABI. */
10228 : :
10229 : : static tree
10230 : 3047 : get_atexit_node (void)
10231 : : {
10232 : 3047 : tree atexit_fndecl;
10233 : 3047 : tree fn_type;
10234 : 3047 : tree fn_ptr_type;
10235 : 3047 : const char *name;
10236 : 3047 : bool use_aeabi_atexit;
10237 : 3047 : tree ctx = global_namespace;
10238 : :
10239 : 3047 : if (atexit_node)
10240 : : return atexit_node;
10241 : :
10242 : 2039 : if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
10243 : : {
10244 : : /* The declaration for `__cxa_atexit' is:
10245 : :
10246 : : int __cxa_atexit (void (*)(void *), void *, void *)
10247 : :
10248 : : We build up the argument types and then the function type
10249 : : itself. */
10250 : 2027 : tree argtype0, argtype1, argtype2;
10251 : :
10252 : 2027 : use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
10253 : : /* First, build the pointer-to-function type for the first
10254 : : argument. */
10255 : 2027 : fn_ptr_type = get_cxa_atexit_fn_ptr_type ();
10256 : : /* Then, build the rest of the argument types. */
10257 : 2027 : argtype2 = ptr_type_node;
10258 : 2027 : if (use_aeabi_atexit)
10259 : : {
10260 : : argtype1 = fn_ptr_type;
10261 : : argtype0 = ptr_type_node;
10262 : : }
10263 : : else
10264 : : {
10265 : 2027 : argtype1 = ptr_type_node;
10266 : 2027 : argtype0 = fn_ptr_type;
10267 : : }
10268 : : /* And the final __cxa_atexit type. */
10269 : 2027 : fn_type = build_function_type_list (integer_type_node,
10270 : : argtype0, argtype1, argtype2,
10271 : : NULL_TREE);
10272 : : /* ... which needs noexcept. */
10273 : 2027 : fn_type = build_exception_variant (fn_type, noexcept_true_spec);
10274 : 2027 : if (use_aeabi_atexit)
10275 : : {
10276 : 0 : name = "__aeabi_atexit";
10277 : 0 : push_to_top_level ();
10278 : 0 : int n = push_namespace (get_identifier ("__aeabiv1"), false);
10279 : 0 : ctx = current_namespace;
10280 : 0 : while (n--)
10281 : 0 : pop_namespace ();
10282 : 0 : pop_from_top_level ();
10283 : : }
10284 : : else
10285 : : {
10286 : 2027 : name = "__cxa_atexit";
10287 : 2027 : ctx = abi_node;
10288 : : }
10289 : : }
10290 : : else
10291 : : {
10292 : : /* The declaration for `atexit' is:
10293 : :
10294 : : int atexit (void (*)());
10295 : :
10296 : : We build up the argument types and then the function type
10297 : : itself. */
10298 : 12 : fn_ptr_type = get_atexit_fn_ptr_type ();
10299 : : /* Build the final atexit type. */
10300 : 12 : fn_type = build_function_type_list (integer_type_node,
10301 : : fn_ptr_type, NULL_TREE);
10302 : : /* ... which needs noexcept. */
10303 : 12 : fn_type = build_exception_variant (fn_type, noexcept_true_spec);
10304 : 12 : name = "atexit";
10305 : : }
10306 : :
10307 : : /* Now, build the function declaration. */
10308 : 2039 : push_lang_context (lang_name_c);
10309 : 2039 : auto cookie = push_abi_namespace (ctx);
10310 : 2039 : atexit_fndecl = build_library_fn_ptr (name, fn_type, ECF_LEAF | ECF_NOTHROW);
10311 : 2039 : DECL_CONTEXT (atexit_fndecl) = FROB_CONTEXT (current_namespace);
10312 : : /* Install as hidden builtin so we're (a) more relaxed about
10313 : : exception spec matching and (b) will not give a confusing location
10314 : : in diagnostic and (c) won't magically appear in user-visible name
10315 : : lookups. */
10316 : 2039 : DECL_SOURCE_LOCATION (atexit_fndecl) = BUILTINS_LOCATION;
10317 : 2039 : atexit_fndecl = pushdecl (atexit_fndecl, /*hiding=*/true);
10318 : 2039 : pop_abi_namespace (cookie, ctx);
10319 : 2039 : mark_used (atexit_fndecl);
10320 : 2039 : pop_lang_context ();
10321 : 2039 : atexit_node = decay_conversion (atexit_fndecl, tf_warning_or_error);
10322 : :
10323 : 2039 : return atexit_node;
10324 : : }
10325 : :
10326 : : /* Like get_atexit_node, but for thread-local cleanups. */
10327 : :
10328 : : static tree
10329 : 84 : get_thread_atexit_node (void)
10330 : : {
10331 : 84 : if (thread_atexit_node)
10332 : : return thread_atexit_node;
10333 : :
10334 : : /* The declaration for `__cxa_thread_atexit' is:
10335 : :
10336 : : int __cxa_thread_atexit (void (*)(void *), void *, void *) */
10337 : 54 : tree fn_type = build_function_type_list (integer_type_node,
10338 : : get_cxa_atexit_fn_ptr_type (),
10339 : : ptr_type_node, ptr_type_node,
10340 : : NULL_TREE);
10341 : :
10342 : : /* Now, build the function declaration, as with __cxa_atexit. */
10343 : 54 : unsigned flags = push_abi_namespace ();
10344 : 54 : tree atexit_fndecl = build_library_fn_ptr ("__cxa_thread_atexit", fn_type,
10345 : : ECF_LEAF | ECF_NOTHROW);
10346 : 54 : DECL_CONTEXT (atexit_fndecl) = FROB_CONTEXT (current_namespace);
10347 : 54 : DECL_SOURCE_LOCATION (atexit_fndecl) = BUILTINS_LOCATION;
10348 : 54 : atexit_fndecl = pushdecl (atexit_fndecl, /*hiding=*/true);
10349 : 54 : pop_abi_namespace (flags);
10350 : 54 : mark_used (atexit_fndecl);
10351 : 54 : thread_atexit_node = decay_conversion (atexit_fndecl, tf_warning_or_error);
10352 : :
10353 : 54 : return thread_atexit_node;
10354 : : }
10355 : :
10356 : : /* Returns the __dso_handle VAR_DECL. */
10357 : :
10358 : : static tree
10359 : 3119 : get_dso_handle_node (void)
10360 : : {
10361 : 3119 : if (dso_handle_node)
10362 : : return dso_handle_node;
10363 : :
10364 : : /* Declare the variable. */
10365 : 2071 : dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
10366 : : ptr_type_node);
10367 : :
10368 : : #ifdef HAVE_GAS_HIDDEN
10369 : 2071 : if (dso_handle_node != error_mark_node)
10370 : : {
10371 : 2068 : DECL_VISIBILITY (dso_handle_node) = VISIBILITY_HIDDEN;
10372 : 2068 : DECL_VISIBILITY_SPECIFIED (dso_handle_node) = 1;
10373 : : }
10374 : : #endif
10375 : :
10376 : 2071 : return dso_handle_node;
10377 : : }
10378 : :
10379 : : /* Begin a new function with internal linkage whose job will be simply
10380 : : to destroy some particular DECL. OB_PARM is true if object pointer
10381 : : is passed to the cleanup function, otherwise no argument is passed. */
10382 : :
10383 : : static tree
10384 : 367 : start_cleanup_fn (tree decl, bool ob_parm, bool omp_target)
10385 : : {
10386 : 367 : push_to_top_level ();
10387 : :
10388 : : /* No need to mangle this. */
10389 : 367 : push_lang_context (lang_name_c);
10390 : :
10391 : : /* Build the name of the function. */
10392 : 367 : gcc_checking_assert (HAS_DECL_ASSEMBLER_NAME_P (decl));
10393 : 367 : const char *dname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
10394 : 367 : dname = targetm.strip_name_encoding (dname);
10395 : 731 : char *name = ACONCAT ((omp_target ? "__omp_tcf" : "__tcf", dname, NULL));
10396 : :
10397 : 367 : tree fntype = TREE_TYPE (ob_parm ? get_cxa_atexit_fn_ptr_type ()
10398 : : : get_atexit_fn_ptr_type ());
10399 : : /* Build the function declaration. */
10400 : 367 : tree fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
10401 : 367 : DECL_CONTEXT (fndecl) = FROB_CONTEXT (current_namespace);
10402 : : /* It's a function with internal linkage, generated by the
10403 : : compiler. */
10404 : 367 : TREE_PUBLIC (fndecl) = 0;
10405 : 367 : DECL_ARTIFICIAL (fndecl) = 1;
10406 : : /* Make the function `inline' so that it is only emitted if it is
10407 : : actually needed. It is unlikely that it will be inlined, since
10408 : : it is only called via a function pointer, but we avoid unnecessary
10409 : : emissions this way. */
10410 : 367 : DECL_DECLARED_INLINE_P (fndecl) = 1;
10411 : 367 : DECL_INTERFACE_KNOWN (fndecl) = 1;
10412 : 367 : if (ob_parm)
10413 : : {
10414 : : /* Build the parameter. */
10415 : 355 : tree parmdecl = cp_build_parm_decl (fndecl, NULL_TREE, ptr_type_node);
10416 : 355 : TREE_USED (parmdecl) = 1;
10417 : 355 : DECL_READ_P (parmdecl) = 1;
10418 : 355 : DECL_ARGUMENTS (fndecl) = parmdecl;
10419 : : }
10420 : :
10421 : 367 : fndecl = pushdecl (fndecl, /*hidden=*/true);
10422 : 367 : if (omp_target)
10423 : : {
10424 : 3 : DECL_ATTRIBUTES (fndecl)
10425 : 3 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
10426 : 3 : DECL_ATTRIBUTES (fndecl));
10427 : 3 : DECL_ATTRIBUTES (fndecl)
10428 : 6 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
10429 : 3 : DECL_ATTRIBUTES (fndecl));
10430 : : }
10431 : 367 : start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
10432 : :
10433 : 367 : pop_lang_context ();
10434 : :
10435 : 367 : return current_function_decl;
10436 : : }
10437 : :
10438 : : /* Finish the cleanup function begun by start_cleanup_fn. */
10439 : :
10440 : : static void
10441 : 367 : end_cleanup_fn (void)
10442 : : {
10443 : 367 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
10444 : :
10445 : 367 : pop_from_top_level ();
10446 : 367 : }
10447 : :
10448 : : /* Generate code to handle the destruction of DECL, an object with
10449 : : static storage duration. */
10450 : :
10451 : : tree
10452 : 13962 : register_dtor_fn (tree decl, bool omp_target)
10453 : : {
10454 : 13962 : tree cleanup;
10455 : 13962 : tree addr;
10456 : 13962 : tree compound_stmt;
10457 : 13962 : tree fcall;
10458 : 13962 : tree type;
10459 : 13962 : bool ob_parm, dso_parm, use_dtor;
10460 : 13962 : tree arg0, arg1, arg2;
10461 : 13962 : tree atex_node;
10462 : :
10463 : 13962 : type = TREE_TYPE (decl);
10464 : 13962 : if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
10465 : 10831 : return void_node;
10466 : :
10467 : 3131 : if (decl_maybe_constant_destruction (decl, type)
10468 : 3131 : && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
10469 : : {
10470 : 0 : cxx_maybe_build_cleanup (decl, tf_warning_or_error);
10471 : 0 : return void_node;
10472 : : }
10473 : :
10474 : : /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
10475 : : "__aeabi_atexit"), and DECL is a class object, we can just pass the
10476 : : destructor to "__cxa_atexit"; we don't have to build a temporary
10477 : : function to do the cleanup. */
10478 : 6262 : dso_parm = (flag_use_cxa_atexit
10479 : 3131 : && !targetm.cxx.use_atexit_for_cxa_atexit ());
10480 : 3131 : ob_parm = (CP_DECL_THREAD_LOCAL_P (decl) || dso_parm);
10481 : 3119 : use_dtor = ob_parm && CLASS_TYPE_P (type);
10482 : 3131 : if (use_dtor)
10483 : : {
10484 : 2764 : cleanup = get_class_binding (type, complete_dtor_identifier);
10485 : :
10486 : : /* Make sure it is accessible. */
10487 : 2764 : perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup,
10488 : : tf_warning_or_error);
10489 : : }
10490 : : else
10491 : : {
10492 : : /* Call build_cleanup before we enter the anonymous function so
10493 : : that any access checks will be done relative to the current
10494 : : scope, rather than the scope of the anonymous function. */
10495 : 367 : build_cleanup (decl);
10496 : :
10497 : : /* Now start the function. */
10498 : 367 : cleanup = start_cleanup_fn (decl, ob_parm, omp_target);
10499 : :
10500 : : /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
10501 : : to the original function, rather than the anonymous one. That
10502 : : will make the back end think that nested functions are in use,
10503 : : which causes confusion. */
10504 : 367 : push_deferring_access_checks (dk_no_check);
10505 : 367 : fcall = build_cleanup (decl);
10506 : 367 : pop_deferring_access_checks ();
10507 : :
10508 : : /* Create the body of the anonymous function. */
10509 : 367 : compound_stmt = begin_compound_stmt (BCS_FN_BODY);
10510 : 367 : finish_expr_stmt (fcall);
10511 : 367 : finish_compound_stmt (compound_stmt);
10512 : 367 : end_cleanup_fn ();
10513 : : }
10514 : :
10515 : : /* Call atexit with the cleanup function. */
10516 : 3131 : mark_used (cleanup);
10517 : 3131 : cleanup = build_address (cleanup);
10518 : :
10519 : 3131 : if (CP_DECL_THREAD_LOCAL_P (decl))
10520 : 84 : atex_node = get_thread_atexit_node ();
10521 : : else
10522 : 3047 : atex_node = get_atexit_node ();
10523 : :
10524 : 3131 : if (use_dtor)
10525 : : {
10526 : : /* We must convert CLEANUP to the type that "__cxa_atexit"
10527 : : expects. */
10528 : 2764 : cleanup = build_nop (get_cxa_atexit_fn_ptr_type (), cleanup);
10529 : : /* "__cxa_atexit" will pass the address of DECL to the
10530 : : cleanup function. */
10531 : 2764 : mark_used (decl);
10532 : 2764 : addr = build_address (decl);
10533 : : /* The declared type of the parameter to "__cxa_atexit" is
10534 : : "void *". For plain "T*", we could just let the
10535 : : machinery in cp_build_function_call convert it -- but if the
10536 : : type is "cv-qualified T *", then we need to convert it
10537 : : before passing it in, to avoid spurious errors. */
10538 : 2764 : addr = build_nop (ptr_type_node, addr);
10539 : : }
10540 : : else
10541 : : /* Since the cleanup functions we build ignore the address
10542 : : they're given, there's no reason to pass the actual address
10543 : : in, and, in general, it's cheaper to pass NULL than any
10544 : : other value. */
10545 : 367 : addr = null_pointer_node;
10546 : :
10547 : 3131 : if (dso_parm)
10548 : 3119 : arg2 = cp_build_addr_expr (get_dso_handle_node (),
10549 : : tf_warning_or_error);
10550 : 12 : else if (ob_parm)
10551 : : /* Just pass NULL to the dso handle parm if we don't actually
10552 : : have a DSO handle on this target. */
10553 : 0 : arg2 = null_pointer_node;
10554 : : else
10555 : : arg2 = NULL_TREE;
10556 : :
10557 : 3119 : if (ob_parm)
10558 : : {
10559 : 3119 : if (!CP_DECL_THREAD_LOCAL_P (decl)
10560 : 3119 : && targetm.cxx.use_aeabi_atexit ())
10561 : : {
10562 : : arg1 = cleanup;
10563 : : arg0 = addr;
10564 : : }
10565 : : else
10566 : : {
10567 : : arg1 = addr;
10568 : : arg0 = cleanup;
10569 : : }
10570 : : }
10571 : : else
10572 : : {
10573 : : arg0 = cleanup;
10574 : : arg1 = NULL_TREE;
10575 : : }
10576 : 3131 : return cp_build_function_call_nary (atex_node, tf_warning_or_error,
10577 : 3131 : arg0, arg1, arg2, NULL_TREE);
10578 : : }
10579 : :
10580 : : /* DECL is a VAR_DECL with static storage duration. INIT, if present,
10581 : : is its initializer. Generate code to handle the construction
10582 : : and destruction of DECL. */
10583 : :
10584 : : static void
10585 : 14380428 : expand_static_init (tree decl, tree init)
10586 : : {
10587 : 14380428 : gcc_assert (VAR_P (decl));
10588 : 14380428 : gcc_assert (TREE_STATIC (decl));
10589 : :
10590 : : /* Some variables require no dynamic initialization. */
10591 : 14380428 : if (decl_maybe_constant_destruction (decl, TREE_TYPE (decl)))
10592 : : {
10593 : : /* Make sure the destructor is callable. */
10594 : 14377385 : cxx_maybe_build_cleanup (decl, tf_warning_or_error);
10595 : 14377385 : if (!init)
10596 : : return;
10597 : : }
10598 : :
10599 : 14643 : if (CP_DECL_THREAD_LOCAL_P (decl) && DECL_GNU_TLS_P (decl)
10600 : 13832 : && !DECL_FUNCTION_SCOPE_P (decl))
10601 : : {
10602 : 15 : auto_diagnostic_group d;
10603 : 15 : location_t dloc = DECL_SOURCE_LOCATION (decl);
10604 : 15 : if (init)
10605 : 12 : error_at (dloc, "non-local variable %qD declared %<__thread%> "
10606 : : "needs dynamic initialization", decl);
10607 : : else
10608 : 3 : error_at (dloc, "non-local variable %qD declared %<__thread%> "
10609 : : "has a non-trivial destructor", decl);
10610 : 15 : static bool informed;
10611 : 15 : if (!informed)
10612 : : {
10613 : 6 : inform (dloc, "C++11 %<thread_local%> allows dynamic "
10614 : : "initialization and destruction");
10615 : 6 : informed = true;
10616 : : }
10617 : 15 : return;
10618 : 15 : }
10619 : :
10620 : 13802 : if (DECL_FUNCTION_SCOPE_P (decl))
10621 : : {
10622 : : /* Emit code to perform this initialization but once. */
10623 : 3503 : tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
10624 : 3503 : tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
10625 : 3503 : tree guard, guard_addr;
10626 : 3503 : tree flag, begin;
10627 : : /* We don't need thread-safety code for thread-local vars. */
10628 : 3503 : bool thread_guard = (flag_threadsafe_statics
10629 : 3503 : && !CP_DECL_THREAD_LOCAL_P (decl));
10630 : :
10631 : : /* Emit code to perform this initialization but once. This code
10632 : : looks like:
10633 : :
10634 : : static <type> guard;
10635 : : if (!__atomic_load (guard.first_byte)) {
10636 : : if (__cxa_guard_acquire (&guard)) {
10637 : : bool flag = false;
10638 : : try {
10639 : : // Do initialization.
10640 : : flag = true; __cxa_guard_release (&guard);
10641 : : // Register variable for destruction at end of program.
10642 : : } catch {
10643 : : if (!flag) __cxa_guard_abort (&guard);
10644 : : }
10645 : : }
10646 : : }
10647 : :
10648 : : Note that the `flag' variable is only set to 1 *after* the
10649 : : initialization is complete. This ensures that an exception,
10650 : : thrown during the construction, will cause the variable to
10651 : : reinitialized when we pass through this code again, as per:
10652 : :
10653 : : [stmt.dcl]
10654 : :
10655 : : If the initialization exits by throwing an exception, the
10656 : : initialization is not complete, so it will be tried again
10657 : : the next time control enters the declaration.
10658 : :
10659 : : This process should be thread-safe, too; multiple threads
10660 : : should not be able to initialize the variable more than
10661 : : once. */
10662 : :
10663 : : /* Create the guard variable. */
10664 : 3503 : guard = get_guard (decl);
10665 : :
10666 : : /* Begin the conditional initialization. */
10667 : 3503 : if_stmt = begin_if_stmt ();
10668 : :
10669 : 3503 : finish_if_stmt_cond (get_guard_cond (guard, thread_guard), if_stmt);
10670 : 3503 : then_clause = begin_compound_stmt (BCS_NO_SCOPE);
10671 : :
10672 : 3503 : if (thread_guard)
10673 : : {
10674 : 3450 : tree vfntype = NULL_TREE;
10675 : 3450 : tree acquire_name, release_name, abort_name;
10676 : 3450 : tree acquire_fn, release_fn, abort_fn;
10677 : 3450 : guard_addr = build_address (guard);
10678 : :
10679 : 3450 : acquire_name = get_identifier ("__cxa_guard_acquire");
10680 : 3450 : release_name = get_identifier ("__cxa_guard_release");
10681 : 3450 : abort_name = get_identifier ("__cxa_guard_abort");
10682 : 3450 : acquire_fn = get_global_binding (acquire_name);
10683 : 3450 : release_fn = get_global_binding (release_name);
10684 : 3450 : abort_fn = get_global_binding (abort_name);
10685 : 3450 : if (!acquire_fn)
10686 : 1919 : acquire_fn = push_library_fn
10687 : 1919 : (acquire_name, build_function_type_list (integer_type_node,
10688 : 1919 : TREE_TYPE (guard_addr),
10689 : : NULL_TREE),
10690 : : NULL_TREE, ECF_NOTHROW);
10691 : 3450 : if (!release_fn || !abort_fn)
10692 : 1922 : vfntype = build_function_type_list (void_type_node,
10693 : 1922 : TREE_TYPE (guard_addr),
10694 : : NULL_TREE);
10695 : 1922 : if (!release_fn)
10696 : 1922 : release_fn = push_library_fn (release_name, vfntype, NULL_TREE,
10697 : : ECF_NOTHROW);
10698 : 3450 : if (!abort_fn)
10699 : 1922 : abort_fn = push_library_fn (abort_name, vfntype, NULL_TREE,
10700 : : ECF_NOTHROW | ECF_LEAF);
10701 : :
10702 : 3450 : inner_if_stmt = begin_if_stmt ();
10703 : 3450 : finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
10704 : : inner_if_stmt);
10705 : :
10706 : 3450 : inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
10707 : 3450 : begin = get_internal_target_expr (boolean_false_node);
10708 : 3450 : flag = TARGET_EXPR_SLOT (begin);
10709 : :
10710 : 3450 : TARGET_EXPR_CLEANUP (begin)
10711 : 3450 : = build3 (COND_EXPR, void_type_node, flag,
10712 : : void_node,
10713 : : build_call_n (abort_fn, 1, guard_addr));
10714 : 3450 : CLEANUP_EH_ONLY (begin) = 1;
10715 : :
10716 : : /* Do the initialization itself. */
10717 : 3450 : init = add_stmt_to_compound (begin, init);
10718 : 3450 : init = add_stmt_to_compound (init,
10719 : : build2 (MODIFY_EXPR, void_type_node,
10720 : : flag, boolean_true_node));
10721 : :
10722 : : /* Use atexit to register a function for destroying this static
10723 : : variable. Do this before calling __cxa_guard_release. */
10724 : 3450 : init = add_stmt_to_compound (init, register_dtor_fn (decl));
10725 : :
10726 : 3450 : init = add_stmt_to_compound (init, build_call_n (release_fn, 1,
10727 : : guard_addr));
10728 : : }
10729 : : else
10730 : : {
10731 : 53 : init = add_stmt_to_compound (init, set_guard (guard));
10732 : :
10733 : : /* Use atexit to register a function for destroying this static
10734 : : variable. */
10735 : 53 : init = add_stmt_to_compound (init, register_dtor_fn (decl));
10736 : : }
10737 : :
10738 : 3503 : finish_expr_stmt (init);
10739 : :
10740 : 3503 : if (thread_guard)
10741 : : {
10742 : 3450 : finish_compound_stmt (inner_then_clause);
10743 : 3450 : finish_then_clause (inner_if_stmt);
10744 : 3450 : finish_if_stmt (inner_if_stmt);
10745 : : }
10746 : :
10747 : 3503 : finish_compound_stmt (then_clause);
10748 : 3503 : finish_then_clause (if_stmt);
10749 : 3503 : finish_if_stmt (if_stmt);
10750 : : }
10751 : 10299 : else if (CP_DECL_THREAD_LOCAL_P (decl))
10752 : 761 : tls_aggregates = tree_cons (init, decl, tls_aggregates);
10753 : : else
10754 : 9538 : static_aggregates = tree_cons (init, decl, static_aggregates);
10755 : : }
10756 : :
10757 : :
10758 : : /* Make TYPE a complete type based on INITIAL_VALUE.
10759 : : Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
10760 : : 2 if there was no information (in which case assume 0 if DO_DEFAULT),
10761 : : 3 if the initializer list is empty (in pedantic mode). */
10762 : :
10763 : : int
10764 : 493824 : cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
10765 : : {
10766 : 493824 : int failure;
10767 : 493824 : tree type, elt_type;
10768 : :
10769 : : /* Don't get confused by a CONSTRUCTOR for some other type. */
10770 : 493794 : if (initial_value && TREE_CODE (initial_value) == CONSTRUCTOR
10771 : 89854 : && !BRACE_ENCLOSED_INITIALIZER_P (initial_value)
10772 : 494141 : && TREE_CODE (TREE_TYPE (initial_value)) != ARRAY_TYPE)
10773 : : return 1;
10774 : :
10775 : 493821 : if (initial_value)
10776 : : {
10777 : : /* An array of character type can be initialized from a
10778 : : brace-enclosed string constant so call reshape_init to
10779 : : remove the optional braces from a braced string literal. */
10780 : 493791 : if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
10781 : 493791 : && BRACE_ENCLOSED_INITIALIZER_P (initial_value))
10782 : 27754 : initial_value = reshape_init (*ptype, initial_value,
10783 : : tf_warning_or_error);
10784 : :
10785 : : /* If any of the elements are parameter packs, we can't actually
10786 : : complete this type now because the array size is dependent. */
10787 : 493791 : if (TREE_CODE (initial_value) == CONSTRUCTOR)
10788 : 14414828 : for (auto &e: CONSTRUCTOR_ELTS (initial_value))
10789 : 14145640 : if (PACK_EXPANSION_P (e.value))
10790 : : return 0;
10791 : : }
10792 : :
10793 : 493821 : failure = complete_array_type (ptype, initial_value, do_default);
10794 : :
10795 : : /* We can create the array before the element type is complete, which
10796 : : means that we didn't have these two bits set in the original type
10797 : : either. In completing the type, we are expected to propagate these
10798 : : bits. See also complete_type which does the same thing for arrays
10799 : : of fixed size. */
10800 : 493821 : type = *ptype;
10801 : 987639 : if (type != error_mark_node && TYPE_DOMAIN (type))
10802 : : {
10803 : 493794 : elt_type = TREE_TYPE (type);
10804 : 493794 : TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
10805 : 987588 : TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
10806 : 493794 : = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
10807 : : }
10808 : :
10809 : : return failure;
10810 : : }
10811 : :
10812 : : /* As above, but either give an error or reject zero-size arrays, depending
10813 : : on COMPLAIN. */
10814 : :
10815 : : int
10816 : 758 : cp_complete_array_type_or_error (tree *ptype, tree initial_value,
10817 : : bool do_default, tsubst_flags_t complain)
10818 : : {
10819 : 758 : int failure;
10820 : 758 : bool sfinae = !(complain & tf_error);
10821 : : /* In SFINAE context we can't be lenient about zero-size arrays. */
10822 : 758 : if (sfinae)
10823 : 3 : ++pedantic;
10824 : 758 : failure = cp_complete_array_type (ptype, initial_value, do_default);
10825 : 758 : if (sfinae)
10826 : 3 : --pedantic;
10827 : 758 : if (failure)
10828 : : {
10829 : 3 : if (sfinae)
10830 : : /* Not an error. */;
10831 : 0 : else if (failure == 1)
10832 : 0 : error ("initializer fails to determine size of %qT", *ptype);
10833 : 0 : else if (failure == 2)
10834 : : {
10835 : 0 : if (do_default)
10836 : 0 : error ("array size missing in %qT", *ptype);
10837 : : }
10838 : 0 : else if (failure == 3)
10839 : 0 : error ("zero-size array %qT", *ptype);
10840 : 3 : *ptype = error_mark_node;
10841 : : }
10842 : 758 : return failure;
10843 : : }
10844 : :
10845 : : /* Return zero if something is declared to be a member of type
10846 : : CTYPE when in the context of CUR_TYPE. STRING is the error
10847 : : message to print in that case. Otherwise, quietly return 1. */
10848 : :
10849 : : static int
10850 : 23511594 : member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
10851 : : {
10852 : 23511594 : if (ctype && ctype != cur_type)
10853 : : {
10854 : 0 : if (flags == DTOR_FLAG)
10855 : 0 : error ("destructor for alien class %qT cannot be a member", ctype);
10856 : : else
10857 : 0 : error ("constructor for alien class %qT cannot be a member", ctype);
10858 : 0 : return 0;
10859 : : }
10860 : : return 1;
10861 : : }
10862 : :
10863 : : /* Subroutine of `grokdeclarator'. */
10864 : :
10865 : : /* Generate errors possibly applicable for a given set of specifiers.
10866 : : This is for ARM $7.1.2. */
10867 : :
10868 : : static void
10869 : 387129901 : bad_specifiers (tree object,
10870 : : enum bad_spec_place type,
10871 : : int virtualp,
10872 : : int quals,
10873 : : int inlinep,
10874 : : int friendp,
10875 : : int raises,
10876 : : const location_t* locations)
10877 : : {
10878 : 387129901 : switch (type)
10879 : : {
10880 : 54063276 : case BSP_VAR:
10881 : 54063276 : if (virtualp)
10882 : 0 : error_at (locations[ds_virtual],
10883 : : "%qD declared as a %<virtual%> variable", object);
10884 : 54063276 : if (quals)
10885 : 3 : error ("%<const%> and %<volatile%> function specifiers on "
10886 : : "%qD invalid in variable declaration", object);
10887 : : break;
10888 : 264926035 : case BSP_PARM:
10889 : 264926035 : if (virtualp)
10890 : 0 : error_at (locations[ds_virtual],
10891 : : "%qD declared as a %<virtual%> parameter", object);
10892 : 264926035 : if (inlinep)
10893 : 6 : error_at (locations[ds_inline],
10894 : : "%qD declared as an %<inline%> parameter", object);
10895 : 264926035 : if (quals)
10896 : 3 : error ("%<const%> and %<volatile%> function specifiers on "
10897 : : "%qD invalid in parameter declaration", object);
10898 : : break;
10899 : 42026035 : case BSP_TYPE:
10900 : 42026035 : if (virtualp)
10901 : 0 : error_at (locations[ds_virtual],
10902 : : "%qD declared as a %<virtual%> type", object);
10903 : 42026035 : if (inlinep)
10904 : 6 : error_at (locations[ds_inline],
10905 : : "%qD declared as an %<inline%> type", object);
10906 : 42026035 : if (quals)
10907 : 0 : error ("%<const%> and %<volatile%> function specifiers on "
10908 : : "%qD invalid in type declaration", object);
10909 : : break;
10910 : 26114555 : case BSP_FIELD:
10911 : 26114555 : if (virtualp)
10912 : 6 : error_at (locations[ds_virtual],
10913 : : "%qD declared as a %<virtual%> field", object);
10914 : 26114555 : if (inlinep)
10915 : 6 : error_at (locations[ds_inline],
10916 : : "%qD declared as an %<inline%> field", object);
10917 : 26114555 : if (quals)
10918 : 0 : error ("%<const%> and %<volatile%> function specifiers on "
10919 : : "%qD invalid in field declaration", object);
10920 : : break;
10921 : 0 : default:
10922 : 0 : gcc_unreachable();
10923 : : }
10924 : 387129901 : if (friendp)
10925 : 0 : error ("%q+D declared as a friend", object);
10926 : 387129901 : if (raises
10927 : 109 : && !flag_noexcept_type
10928 : 387129922 : && (TREE_CODE (object) == TYPE_DECL
10929 : 15 : || (!TYPE_PTRFN_P (TREE_TYPE (object))
10930 : 5 : && !TYPE_REFFN_P (TREE_TYPE (object))
10931 : 4 : && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
10932 : 6 : error ("%q+D declared with an exception specification", object);
10933 : 387129901 : }
10934 : :
10935 : : /* DECL is a member function or static data member and is presently
10936 : : being defined. Check that the definition is taking place in a
10937 : : valid namespace. */
10938 : :
10939 : : static void
10940 : 80710780 : check_class_member_definition_namespace (tree decl)
10941 : : {
10942 : : /* These checks only apply to member functions and static data
10943 : : members. */
10944 : 80710780 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
10945 : : /* We check for problems with specializations in pt.cc in
10946 : : check_specialization_namespace, where we can issue better
10947 : : diagnostics. */
10948 : 80710780 : if (processing_specialization)
10949 : : return;
10950 : : /* We check this in check_explicit_instantiation_namespace. */
10951 : 80557320 : if (processing_explicit_instantiation)
10952 : : return;
10953 : : /* [class.mfct]
10954 : :
10955 : : A member function definition that appears outside of the
10956 : : class definition shall appear in a namespace scope enclosing
10957 : : the class definition.
10958 : :
10959 : : [class.static.data]
10960 : :
10961 : : The definition for a static data member shall appear in a
10962 : : namespace scope enclosing the member's class definition. */
10963 : 80557248 : if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
10964 : 18 : permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
10965 : 18 : decl, DECL_CONTEXT (decl));
10966 : : }
10967 : :
10968 : : /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
10969 : : METHOD_TYPE for a non-static member function; QUALS are the
10970 : : cv-qualifiers that apply to the function. */
10971 : :
10972 : : tree
10973 : 197759505 : build_this_parm (tree fn, tree type, cp_cv_quals quals)
10974 : : {
10975 : 197759505 : tree this_type;
10976 : 197759505 : tree qual_type;
10977 : 197759505 : tree parm;
10978 : 197759505 : cp_cv_quals this_quals;
10979 : :
10980 : 197759505 : if (CLASS_TYPE_P (type))
10981 : : {
10982 : 89032433 : this_type
10983 : 89032433 : = cp_build_qualified_type (type, quals & ~TYPE_QUAL_RESTRICT);
10984 : 89032433 : this_type = build_pointer_type (this_type);
10985 : : }
10986 : : else
10987 : 108727072 : this_type = type_of_this_parm (type);
10988 : : /* The `this' parameter is implicitly `const'; it cannot be
10989 : : assigned to. */
10990 : 197759505 : this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
10991 : 197759505 : qual_type = cp_build_qualified_type (this_type, this_quals);
10992 : 197759505 : parm = build_artificial_parm (fn, this_identifier, qual_type);
10993 : 197759505 : cp_apply_type_quals_to_decl (this_quals, parm);
10994 : 197759505 : return parm;
10995 : : }
10996 : :
10997 : : /* DECL is a static member function. Complain if it was declared
10998 : : with function-cv-quals. */
10999 : :
11000 : : static void
11001 : 8259334 : check_static_quals (tree decl, cp_cv_quals quals)
11002 : : {
11003 : 0 : if (quals != TYPE_UNQUALIFIED)
11004 : 6 : error ("static member function %q#D declared with type qualifiers",
11005 : : decl);
11006 : 0 : }
11007 : :
11008 : : /* Helper function. Replace the temporary this parameter injected
11009 : : during cp_finish_omp_declare_simd with the real this parameter. */
11010 : :
11011 : : static tree
11012 : 2500 : declare_simd_adjust_this (tree *tp, int *walk_subtrees, void *data)
11013 : : {
11014 : 2500 : tree this_parm = (tree) data;
11015 : 2500 : if (TREE_CODE (*tp) == PARM_DECL
11016 : 450 : && DECL_NAME (*tp) == this_identifier
11017 : 2773 : && *tp != this_parm)
11018 : 273 : *tp = this_parm;
11019 : 2227 : else if (TYPE_P (*tp))
11020 : 33 : *walk_subtrees = 0;
11021 : 2500 : return NULL_TREE;
11022 : : }
11023 : :
11024 : : /* CTYPE is class type, or null if non-class.
11025 : : TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
11026 : : or METHOD_TYPE.
11027 : : DECLARATOR is the function's name.
11028 : : PARMS is a chain of PARM_DECLs for the function.
11029 : : VIRTUALP is truthvalue of whether the function is virtual or not.
11030 : : FLAGS are to be passed through to `grokclassfn'.
11031 : : QUALS are qualifiers indicating whether the function is `const'
11032 : : or `volatile'.
11033 : : RAISES is a list of exceptions that this function can raise.
11034 : : CHECK is 1 if we must find this method in CTYPE, 0 if we should
11035 : : not look, and -1 if we should not call `grokclassfn' at all.
11036 : :
11037 : : SFK is the kind of special function (if any) for the new function.
11038 : :
11039 : : Returns `NULL_TREE' if something goes wrong, after issuing
11040 : : applicable error messages. */
11041 : :
11042 : : static tree
11043 : 165528340 : grokfndecl (tree ctype,
11044 : : tree type,
11045 : : tree declarator,
11046 : : tree parms,
11047 : : tree orig_declarator,
11048 : : const cp_decl_specifier_seq *declspecs,
11049 : : tree decl_reqs,
11050 : : int virtualp,
11051 : : enum overload_flags flags,
11052 : : cp_cv_quals quals,
11053 : : cp_ref_qualifier rqual,
11054 : : tree raises,
11055 : : int check,
11056 : : int friendp,
11057 : : int publicp,
11058 : : int inlinep,
11059 : : bool deletedp,
11060 : : bool xobj_func_p,
11061 : : special_function_kind sfk,
11062 : : bool funcdef_flag,
11063 : : bool late_return_type_p,
11064 : : int template_count,
11065 : : tree in_namespace,
11066 : : tree* attrlist,
11067 : : location_t location)
11068 : : {
11069 : 165528340 : tree decl;
11070 : 165528340 : tree t;
11071 : :
11072 : 165528340 : if (location == UNKNOWN_LOCATION)
11073 : 0 : location = input_location;
11074 : :
11075 : : /* Was the concept specifier present? */
11076 : 165528340 : bool concept_p = inlinep & 4;
11077 : :
11078 : 165528340 : if (concept_p)
11079 : : {
11080 : 15 : error_at (location, "function concepts are no longer supported");
11081 : 15 : return NULL_TREE;
11082 : : }
11083 : :
11084 : 165528325 : type = build_cp_fntype_variant (type, rqual, raises, late_return_type_p);
11085 : :
11086 : 165528325 : decl = build_lang_decl_loc (location, FUNCTION_DECL, declarator, type);
11087 : :
11088 : : /* Set the constraints on the declaration. */
11089 : 165528325 : if (flag_concepts)
11090 : : {
11091 : 45084975 : tree tmpl_reqs = NULL_TREE;
11092 : 45084975 : tree ctx = friendp ? current_class_type : ctype;
11093 : 45084975 : bool block_local = TREE_CODE (current_scope ()) == FUNCTION_DECL;
11094 : 45084975 : bool memtmpl = (!block_local
11095 : 45084975 : && (current_template_depth
11096 : 45073121 : > template_class_depth (ctx)));
11097 : 12746864 : if (memtmpl)
11098 : : {
11099 : 12746864 : if (!current_template_parms)
11100 : : /* If there are no template parameters, something must have
11101 : : gone wrong. */
11102 : 0 : gcc_assert (seen_error ());
11103 : : else
11104 : 12746864 : tmpl_reqs = TEMPLATE_PARMS_CONSTRAINTS (current_template_parms);
11105 : : }
11106 : 45084975 : tree ci = build_constraints (tmpl_reqs, decl_reqs);
11107 : : /* C++20 CA378: Remove non-templated constrained functions. */
11108 : : /* [temp.friend]/9 A non-template friend declaration with a
11109 : : requires-clause shall be a definition. A friend function template with
11110 : : a constraint that depends on a template parameter from an enclosing
11111 : : template shall be a definition. */
11112 : 45084975 : if (ci
11113 : 3137962 : && (block_local
11114 : 3137959 : || !processing_template_decl
11115 : 3137904 : || (friendp && !memtmpl && !funcdef_flag)))
11116 : : {
11117 : 67 : if (!friendp || !processing_template_decl)
11118 : 58 : error_at (location, "constraints on a non-templated function");
11119 : : else
11120 : 9 : error_at (location, "constrained non-template friend declaration"
11121 : : " must be a definition");
11122 : : ci = NULL_TREE;
11123 : : }
11124 : 45084975 : set_constraints (decl, ci);
11125 : 419801 : if (ci && friendp && memtmpl && !funcdef_flag
11126 : 45093766 : && uses_outer_template_parms_in_constraints (decl, ctx))
11127 : 6 : error_at (location, "friend function template with constraints that "
11128 : : "depend on outer template parameters must be a definition");
11129 : : }
11130 : :
11131 : 165528325 : if (TREE_CODE (type) == METHOD_TYPE)
11132 : : {
11133 : 87197433 : tree parm = build_this_parm (decl, type, quals);
11134 : 87197433 : DECL_CHAIN (parm) = parms;
11135 : 87197433 : parms = parm;
11136 : :
11137 : : /* Allocate space to hold the vptr bit if needed. */
11138 : 87197433 : SET_DECL_ALIGN (decl, MINIMUM_METHOD_BOUNDARY);
11139 : : }
11140 : :
11141 : 165528325 : DECL_ARGUMENTS (decl) = parms;
11142 : 502913344 : for (t = parms; t; t = DECL_CHAIN (t))
11143 : 337385019 : DECL_CONTEXT (t) = decl;
11144 : :
11145 : : /* Propagate volatile out from type to decl. */
11146 : 165528325 : if (TYPE_VOLATILE (type))
11147 : 0 : TREE_THIS_VOLATILE (decl) = 1;
11148 : :
11149 : : /* Setup decl according to sfk. */
11150 : 165528325 : switch (sfk)
11151 : : {
11152 : 21417631 : case sfk_constructor:
11153 : 21417631 : case sfk_copy_constructor:
11154 : 21417631 : case sfk_move_constructor:
11155 : 21417631 : DECL_CXX_CONSTRUCTOR_P (decl) = 1;
11156 : 21417631 : DECL_NAME (decl) = ctor_identifier;
11157 : 21417631 : break;
11158 : 3036970 : case sfk_destructor:
11159 : 3036970 : DECL_CXX_DESTRUCTOR_P (decl) = 1;
11160 : 3036970 : DECL_NAME (decl) = dtor_identifier;
11161 : 3036970 : break;
11162 : 1001702 : case sfk_deduction_guide:
11163 : : /* Give deduction guides a definition even though they don't really
11164 : : have one: the restriction that you can't repeat a deduction guide
11165 : : makes them more like a definition anyway. */
11166 : 1001702 : DECL_INITIAL (decl) = void_node;
11167 : : /* But to ensure that external-linkage deduction guides in header units
11168 : : don't fall afoul of [module.import] p6, mark them as inline. */
11169 : 1001702 : DECL_DECLARED_INLINE_P (decl) = true;
11170 : 1001702 : break;
11171 : : default:
11172 : : break;
11173 : : }
11174 : :
11175 : 165528325 : if (friendp && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
11176 : : {
11177 : 11223 : if (funcdef_flag)
11178 : 3 : error_at (location,
11179 : : "defining explicit specialization %qD in friend declaration",
11180 : : orig_declarator);
11181 : : else
11182 : : {
11183 : 11220 : tree fns = TREE_OPERAND (orig_declarator, 0);
11184 : 11220 : tree args = TREE_OPERAND (orig_declarator, 1);
11185 : :
11186 : 11220 : if (PROCESSING_REAL_TEMPLATE_DECL_P ())
11187 : : {
11188 : : /* Something like `template <class T> friend void f<T>()'. */
11189 : 6 : error_at (location,
11190 : : "invalid use of template-id %qD in declaration "
11191 : : "of primary template",
11192 : : orig_declarator);
11193 : 6 : return NULL_TREE;
11194 : : }
11195 : :
11196 : : /* A friend declaration of the form friend void f<>(). Record
11197 : : the information in the TEMPLATE_ID_EXPR. */
11198 : 11214 : SET_DECL_IMPLICIT_INSTANTIATION (decl);
11199 : :
11200 : 11214 : gcc_assert (identifier_p (fns) || OVL_P (fns));
11201 : 11214 : DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
11202 : :
11203 : 55617 : for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
11204 : 44407 : if (TREE_PURPOSE (t)
11205 : 44407 : && TREE_CODE (TREE_PURPOSE (t)) == DEFERRED_PARSE)
11206 : : {
11207 : 4 : error_at (defparse_location (TREE_PURPOSE (t)),
11208 : : "default arguments are not allowed in declaration "
11209 : : "of friend template specialization %qD",
11210 : : decl);
11211 : 4 : return NULL_TREE;
11212 : : }
11213 : :
11214 : 11210 : if (inlinep & 1)
11215 : : {
11216 : 4 : error_at (declspecs->locations[ds_inline],
11217 : : "%<inline%> is not allowed in declaration of friend "
11218 : : "template specialization %qD",
11219 : : decl);
11220 : 4 : return NULL_TREE;
11221 : : }
11222 : : }
11223 : : }
11224 : :
11225 : : /* C++17 11.3.6/4: "If a friend declaration specifies a default argument
11226 : : expression, that declaration shall be a definition..." */
11227 : 165528311 : if (friendp && !funcdef_flag)
11228 : : {
11229 : 1156464 : bool has_errored = false;
11230 : 1156464 : for (tree t = FUNCTION_FIRST_USER_PARMTYPE (decl);
11231 : 3435361 : t && t != void_list_node; t = TREE_CHAIN (t))
11232 : 2278897 : if (TREE_PURPOSE (t))
11233 : : {
11234 : 48 : diagnostic_t diag_kind = DK_PERMERROR;
11235 : : /* For templates, mark the default argument as erroneous and give a
11236 : : hard error. */
11237 : 48 : if (processing_template_decl)
11238 : : {
11239 : 30 : diag_kind = DK_ERROR;
11240 : 30 : TREE_PURPOSE (t) = error_mark_node;
11241 : : }
11242 : 48 : if (!has_errored)
11243 : : {
11244 : 45 : has_errored = true;
11245 : 45 : emit_diagnostic (diag_kind,
11246 : 45 : DECL_SOURCE_LOCATION (decl),
11247 : : /*diagnostic_option_id=*/0,
11248 : : "friend declaration of %qD specifies default "
11249 : : "arguments and isn%'t a definition", decl);
11250 : : }
11251 : : }
11252 : : }
11253 : :
11254 : : /* If this decl has namespace scope, set that up. */
11255 : 165528311 : if (in_namespace)
11256 : 94441 : set_decl_namespace (decl, in_namespace, friendp);
11257 : 165433870 : else if (ctype)
11258 : 95324274 : DECL_CONTEXT (decl) = ctype;
11259 : : else
11260 : 70109596 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
11261 : :
11262 : : /* `main' and builtins have implicit 'C' linkage. */
11263 : 165528311 : if (ctype == NULL_TREE
11264 : 70204037 : && DECL_FILE_SCOPE_P (decl)
11265 : 29961571 : && current_lang_name == lang_name_cplusplus
11266 : 168266715 : && (MAIN_NAME_P (declarator)
11267 : 2705853 : || (IDENTIFIER_LENGTH (declarator) > 10
11268 : 1889118 : && IDENTIFIER_POINTER (declarator)[0] == '_'
11269 : 1447969 : && IDENTIFIER_POINTER (declarator)[1] == '_'
11270 : 339491 : && startswith (IDENTIFIER_POINTER (declarator) + 2,
11271 : : "builtin_"))
11272 : 2705835 : || (targetcm.cxx_implicit_extern_c
11273 : 0 : && (targetcm.cxx_implicit_extern_c
11274 : 0 : (IDENTIFIER_POINTER (declarator))))))
11275 : 32569 : SET_DECL_LANGUAGE (decl, lang_c);
11276 : :
11277 : 165528311 : DECL_STATIC_FUNCTION_P (decl)
11278 : 165528311 : = !xobj_func_p && ctype && TREE_CODE (type) == FUNCTION_TYPE;
11279 : 165528311 : DECL_FUNCTION_XOBJ_FLAG (decl) = xobj_func_p;
11280 : :
11281 : 165528311 : if (deletedp)
11282 : 3396997 : DECL_DELETED_FN (decl) = 1;
11283 : :
11284 : 165528311 : if (ctype && funcdef_flag)
11285 : 80339114 : check_class_member_definition_namespace (decl);
11286 : :
11287 : 165528311 : if (ctype == NULL_TREE && DECL_MAIN_P (decl))
11288 : : {
11289 : 32554 : if (PROCESSING_REAL_TEMPLATE_DECL_P())
11290 : 9 : error_at (location, "cannot declare %<::main%> to be a template");
11291 : 32554 : if (inlinep & 1)
11292 : 3 : error_at (declspecs->locations[ds_inline],
11293 : : "cannot declare %<::main%> to be inline");
11294 : 32554 : if (inlinep & 2)
11295 : 6 : error_at (declspecs->locations[ds_constexpr],
11296 : : "cannot declare %<::main%> to be %qs", "constexpr");
11297 : 32554 : if (inlinep & 8)
11298 : 3 : error_at (declspecs->locations[ds_consteval],
11299 : : "cannot declare %<::main%> to be %qs", "consteval");
11300 : 32554 : if (!publicp)
11301 : 0 : error_at (location, "cannot declare %<::main%> to be static");
11302 : 32554 : if (current_lang_depth () != 0)
11303 : 12 : pedwarn (location, OPT_Wpedantic, "cannot declare %<::main%> with a"
11304 : : " linkage specification");
11305 : 32554 : if (module_attach_p ())
11306 : 3 : error_at (location, "cannot attach %<::main%> to a named module");
11307 : : inlinep = 0;
11308 : : publicp = 1;
11309 : : }
11310 : :
11311 : : /* Members of anonymous types and local classes have no linkage; make
11312 : : them internal. If a typedef is made later, this will be changed. */
11313 : 165528311 : if (ctype && !TREE_PUBLIC (TYPE_MAIN_DECL (ctype)))
11314 : : publicp = 0;
11315 : 165501090 : else if (ctype && decl_function_context (TYPE_MAIN_DECL (ctype)))
11316 : : /* But members of local classes in a module CMI should have their
11317 : : definitions exported, in case they are (directly or indirectly)
11318 : : used by an importer. We don't just use module_has_cmi_p here
11319 : : because for entities in the GMF we don't yet know whether this
11320 : : module will have a CMI, so we'll conservatively assume it might. */
11321 : 1012949 : publicp = module_maybe_has_cmi_p ();
11322 : :
11323 : 165501090 : if (publicp && cxx_dialect == cxx98)
11324 : : {
11325 : : /* [basic.link]: A name with no linkage (notably, the name of a class
11326 : : or enumeration declared in a local scope) shall not be used to
11327 : : declare an entity with linkage.
11328 : :
11329 : : DR 757 relaxes this restriction for C++0x. */
11330 : 904049 : no_linkage_error (decl);
11331 : : }
11332 : :
11333 : 165528311 : TREE_PUBLIC (decl) = publicp;
11334 : 165528311 : if (! publicp)
11335 : : {
11336 : 1141257 : DECL_INTERFACE_KNOWN (decl) = 1;
11337 : 1141257 : DECL_NOT_REALLY_EXTERN (decl) = 1;
11338 : : }
11339 : :
11340 : : /* If the declaration was declared inline, mark it as such. */
11341 : 165528311 : if (inlinep)
11342 : : {
11343 : 48632293 : DECL_DECLARED_INLINE_P (decl) = 1;
11344 : 48632293 : if (publicp)
11345 : 48492616 : DECL_COMDAT (decl) = 1;
11346 : : }
11347 : 48632293 : if (inlinep & 2)
11348 : 28288377 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
11349 : 137239934 : else if (inlinep & 8)
11350 : : {
11351 : 139782 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
11352 : 139782 : SET_DECL_IMMEDIATE_FUNCTION_P (decl);
11353 : : }
11354 : :
11355 : 165528311 : DECL_EXTERNAL (decl) = 1;
11356 : 165528311 : if (TREE_CODE (type) == FUNCTION_TYPE)
11357 : : {
11358 : 78330878 : if (quals || rqual)
11359 : 272 : TREE_TYPE (decl) = apply_memfn_quals (TREE_TYPE (decl),
11360 : : TYPE_UNQUALIFIED,
11361 : : REF_QUAL_NONE);
11362 : 78330878 : auto_diagnostic_group d;
11363 : 78330878 : if (quals)
11364 : 423 : error (!ctype
11365 : : ? G_("non-member function %qD cannot have cv-qualifier")
11366 : : : !xobj_func_p
11367 : 198 : ? G_("static member function %qD cannot have cv-qualifier")
11368 : : : G_("explicit object member function "
11369 : : "%qD cannot have cv-qualifier"),
11370 : : decl);
11371 : 78330878 : if (rqual)
11372 : 355 : error (!ctype
11373 : : ? G_("non-member function %qD cannot have ref-qualifier")
11374 : : : !xobj_func_p
11375 : 176 : ? G_("static member function %qD cannot have ref-qualifier")
11376 : : : G_("explicit object member function "
11377 : : "%qD cannot have ref-qualifier"),
11378 : : decl);
11379 : :
11380 : 78330878 : if (xobj_func_p && (quals || rqual))
11381 : 242 : inform (DECL_SOURCE_LOCATION (DECL_ARGUMENTS (decl)),
11382 : : "explicit object parameter declared here");
11383 : 78330878 : quals = TYPE_UNQUALIFIED;
11384 : 78330878 : rqual = REF_QUAL_NONE;
11385 : :
11386 : 78330878 : }
11387 : :
11388 : 165528311 : if (deduction_guide_p (decl))
11389 : : {
11390 : 1001702 : tree type = TREE_TYPE (DECL_NAME (decl));
11391 : 1001702 : if (in_namespace == NULL_TREE
11392 : 1001702 : && CP_DECL_CONTEXT (decl) != CP_TYPE_CONTEXT (type))
11393 : : {
11394 : 3 : auto_diagnostic_group d;
11395 : 3 : error_at (location, "deduction guide %qD must be declared in the "
11396 : : "same scope as %qT", decl, type);
11397 : 3 : inform (location_of (type), " declared here");
11398 : 3 : return NULL_TREE;
11399 : 3 : }
11400 : 2003398 : if (DECL_CLASS_SCOPE_P (decl)
11401 : 1001738 : && current_access_specifier != declared_access (TYPE_NAME (type)))
11402 : : {
11403 : 3 : auto_diagnostic_group d;
11404 : 3 : error_at (location, "deduction guide %qD must have the same access "
11405 : : "as %qT", decl, type);
11406 : 3 : inform (location_of (type), " declared here");
11407 : 3 : }
11408 : 1001699 : if (funcdef_flag)
11409 : 3 : error_at (location,
11410 : : "deduction guide %qD must not have a function body", decl);
11411 : : }
11412 : 308966203 : else if (IDENTIFIER_ANY_OP_P (DECL_NAME (decl))
11413 : 174669938 : && !grok_op_properties (decl, /*complain=*/true))
11414 : : return NULL_TREE;
11415 : 164526459 : else if (UDLIT_OPER_P (DECL_NAME (decl)))
11416 : : {
11417 : 272987 : bool long_long_unsigned_p;
11418 : 272987 : bool long_double_p;
11419 : 272987 : const char *suffix = NULL;
11420 : : /* [over.literal]/6: Literal operators shall not have C linkage. */
11421 : 272987 : if (DECL_LANGUAGE (decl) == lang_c)
11422 : : {
11423 : 6 : auto_diagnostic_group d;
11424 : 6 : error_at (location, "literal operator with C linkage");
11425 : 6 : maybe_show_extern_c_location ();
11426 : 6 : return NULL_TREE;
11427 : 6 : }
11428 : :
11429 : 272981 : if (DECL_NAMESPACE_SCOPE_P (decl))
11430 : : {
11431 : 272975 : if (!check_literal_operator_args (decl, &long_long_unsigned_p,
11432 : : &long_double_p))
11433 : : {
11434 : 42 : error_at (location, "%qD has invalid argument list", decl);
11435 : 42 : return NULL_TREE;
11436 : : }
11437 : :
11438 : 272933 : suffix = UDLIT_OP_SUFFIX (DECL_NAME (decl));
11439 : 272933 : if (long_long_unsigned_p)
11440 : : {
11441 : 32994 : if (cpp_interpret_int_suffix (parse_in, suffix, strlen (suffix)))
11442 : 68 : warning_at (location, 0, "integer suffix %qs"
11443 : : " shadowed by implementation", suffix);
11444 : : }
11445 : 239939 : else if (long_double_p)
11446 : : {
11447 : 86841 : if (cpp_interpret_float_suffix (parse_in, suffix, strlen (suffix)))
11448 : 80 : warning_at (location, 0, "floating-point suffix %qs"
11449 : : " shadowed by implementation", suffix);
11450 : : }
11451 : : /* 17.6.3.3.5 */
11452 : 272933 : if (suffix[0] != '_'
11453 : 272389 : && !current_function_decl && !(friendp && !funcdef_flag))
11454 : 272383 : warning_at (location, OPT_Wliteral_suffix,
11455 : : "literal operator suffixes not preceded by %<_%>"
11456 : : " are reserved for future standardization");
11457 : : }
11458 : : else
11459 : : {
11460 : 6 : error_at (location, "%qD must be a non-member function", decl);
11461 : 6 : return NULL_TREE;
11462 : : }
11463 : : }
11464 : :
11465 : 164526408 : if (funcdef_flag)
11466 : : /* Make the init_value nonzero so pushdecl knows this is not
11467 : : tentative. error_mark_node is replaced later with the BLOCK. */
11468 : 112841429 : DECL_INITIAL (decl) = error_mark_node;
11469 : :
11470 : 165528104 : if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
11471 : 61546788 : TREE_NOTHROW (decl) = 1;
11472 : :
11473 : 165528104 : if (flag_openmp || flag_openmp_simd)
11474 : : {
11475 : : /* Adjust "omp declare simd" attributes. */
11476 : 268413 : tree ods = lookup_attribute ("omp declare simd", *attrlist);
11477 : 268413 : if (ods)
11478 : : {
11479 : : tree attr;
11480 : 2006 : for (attr = ods; attr;
11481 : 1060 : attr = lookup_attribute ("omp declare simd", TREE_CHAIN (attr)))
11482 : : {
11483 : 1060 : if (TREE_CODE (type) == METHOD_TYPE)
11484 : 204 : walk_tree (&TREE_VALUE (attr), declare_simd_adjust_this,
11485 : : DECL_ARGUMENTS (decl), NULL);
11486 : 1060 : if (TREE_VALUE (attr) != NULL_TREE)
11487 : : {
11488 : 854 : tree cl = TREE_VALUE (TREE_VALUE (attr));
11489 : 854 : cl = c_omp_declare_simd_clauses_to_numbers
11490 : 854 : (DECL_ARGUMENTS (decl), cl);
11491 : 854 : if (cl)
11492 : 854 : TREE_VALUE (TREE_VALUE (attr)) = cl;
11493 : : else
11494 : 0 : TREE_VALUE (attr) = NULL_TREE;
11495 : : }
11496 : : }
11497 : : }
11498 : : }
11499 : :
11500 : : /* Caller will do the rest of this. */
11501 : 165528104 : if (check < 0)
11502 : 3717933 : return decl;
11503 : :
11504 : 161810171 : if (ctype != NULL_TREE)
11505 : 95323978 : grokclassfn (ctype, decl, flags);
11506 : :
11507 : : /* 12.4/3 */
11508 : 161810171 : if (cxx_dialect >= cxx11
11509 : 321816148 : && DECL_DESTRUCTOR_P (decl)
11510 : 3019791 : && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl))
11511 : 161976553 : && !processing_template_decl)
11512 : 84027 : deduce_noexcept_on_destructor (decl);
11513 : :
11514 : 161810171 : set_originating_module (decl);
11515 : :
11516 : 161810171 : decl = check_explicit_specialization (orig_declarator, decl,
11517 : : template_count,
11518 : 161810171 : 2 * funcdef_flag +
11519 : 161810171 : 4 * (friendp != 0),
11520 : : *attrlist);
11521 : 161810171 : if (decl == error_mark_node)
11522 : : return NULL_TREE;
11523 : :
11524 : 161809923 : if (DECL_STATIC_FUNCTION_P (decl))
11525 : 8104054 : check_static_quals (decl, quals);
11526 : :
11527 : 161809923 : if (attrlist)
11528 : : {
11529 : 161809923 : cplus_decl_attributes (&decl, *attrlist, 0);
11530 : 161809923 : *attrlist = NULL_TREE;
11531 : : }
11532 : :
11533 : 161809923 : if (DECL_HAS_CONTRACTS_P (decl))
11534 : 463 : rebuild_postconditions (decl);
11535 : :
11536 : : /* Check main's type after attributes have been applied. */
11537 : 161809923 : if (ctype == NULL_TREE && DECL_MAIN_P (decl))
11538 : : {
11539 : 32542 : if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
11540 : : integer_type_node))
11541 : : {
11542 : 20 : tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
11543 : 20 : tree newtype;
11544 : 20 : error_at (declspecs->locations[ds_type_spec],
11545 : : "%<::main%> must return %<int%>");
11546 : 20 : newtype = build_function_type (integer_type_node, oldtypeargs);
11547 : 20 : TREE_TYPE (decl) = newtype;
11548 : : }
11549 : 32542 : if (warn_main)
11550 : 32522 : check_main_parameter_types (decl);
11551 : : }
11552 : :
11553 : 161809923 : if (ctype != NULL_TREE && check)
11554 : : {
11555 : 8889489 : tree old_decl = check_classfn (ctype, decl,
11556 : 8889489 : (current_template_depth
11557 : 8889489 : > template_class_depth (ctype))
11558 : 2089753 : ? current_template_parms
11559 : : : NULL_TREE);
11560 : :
11561 : 8889489 : if (old_decl == error_mark_node)
11562 : : return NULL_TREE;
11563 : :
11564 : 8889408 : if (old_decl)
11565 : : {
11566 : 8492776 : tree ok;
11567 : 8492776 : tree pushed_scope;
11568 : :
11569 : 8492776 : if (TREE_CODE (old_decl) == TEMPLATE_DECL)
11570 : : /* Because grokfndecl is always supposed to return a
11571 : : FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
11572 : : here. We depend on our callers to figure out that its
11573 : : really a template that's being returned. */
11574 : 2089741 : old_decl = DECL_TEMPLATE_RESULT (old_decl);
11575 : :
11576 : 8492776 : if (DECL_STATIC_FUNCTION_P (old_decl)
11577 : 8492776 : && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
11578 : : {
11579 : : /* Remove the `this' parm added by grokclassfn. */
11580 : 155280 : revert_static_member_fn (decl);
11581 : 155280 : check_static_quals (decl, quals);
11582 : : }
11583 : 8492776 : if (DECL_ARTIFICIAL (old_decl))
11584 : : {
11585 : 9 : error ("definition of implicitly-declared %qD", old_decl);
11586 : 9 : return NULL_TREE;
11587 : : }
11588 : 8492767 : else if (DECL_DEFAULTED_FN (old_decl))
11589 : : {
11590 : 3 : auto_diagnostic_group d;
11591 : 3 : error ("definition of explicitly-defaulted %q+D", decl);
11592 : 3 : inform (DECL_SOURCE_LOCATION (old_decl),
11593 : : "%q#D explicitly defaulted here", old_decl);
11594 : 3 : return NULL_TREE;
11595 : 3 : }
11596 : :
11597 : : /* Since we've smashed OLD_DECL to its
11598 : : DECL_TEMPLATE_RESULT, we must do the same to DECL. */
11599 : 8492764 : if (TREE_CODE (decl) == TEMPLATE_DECL)
11600 : 915 : decl = DECL_TEMPLATE_RESULT (decl);
11601 : :
11602 : : /* Attempt to merge the declarations. This can fail, in
11603 : : the case of some invalid specialization declarations. */
11604 : 8492764 : pushed_scope = push_scope (ctype);
11605 : 8492764 : ok = duplicate_decls (decl, old_decl);
11606 : 8492764 : if (pushed_scope)
11607 : 8492764 : pop_scope (pushed_scope);
11608 : 8492764 : if (!ok)
11609 : : {
11610 : 0 : error ("no %q#D member function declared in class %qT",
11611 : : decl, ctype);
11612 : 0 : return NULL_TREE;
11613 : : }
11614 : 8492764 : if (ok == error_mark_node)
11615 : : return NULL_TREE;
11616 : : return old_decl;
11617 : : }
11618 : : }
11619 : :
11620 : 306634132 : if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
11621 : : return NULL_TREE;
11622 : :
11623 : 153317063 : if (ctype == NULL_TREE || check)
11624 : 66882634 : return decl;
11625 : :
11626 : 86434429 : if (virtualp)
11627 : 3927769 : DECL_VIRTUAL_P (decl) = 1;
11628 : :
11629 : 86434429 : return decl;
11630 : : }
11631 : :
11632 : : /* decl is a FUNCTION_DECL.
11633 : : specifiers are the parsed virt-specifiers.
11634 : :
11635 : : Set flags to reflect the virt-specifiers.
11636 : :
11637 : : Returns decl. */
11638 : :
11639 : : static tree
11640 : 90152460 : set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
11641 : : {
11642 : 90152460 : if (decl == NULL_TREE)
11643 : : return decl;
11644 : 90152362 : if (specifiers & VIRT_SPEC_OVERRIDE)
11645 : 170371 : DECL_OVERRIDE_P (decl) = 1;
11646 : 90152362 : if (specifiers & VIRT_SPEC_FINAL)
11647 : 2732 : DECL_FINAL_P (decl) = 1;
11648 : : return decl;
11649 : : }
11650 : :
11651 : : /* DECL is a VAR_DECL for a static data member. Set flags to reflect
11652 : : the linkage that DECL will receive in the object file. */
11653 : :
11654 : : static void
11655 : 10082907 : set_linkage_for_static_data_member (tree decl)
11656 : : {
11657 : : /* A static data member always has static storage duration and
11658 : : external linkage. Note that static data members are forbidden in
11659 : : local classes -- the only situation in which a class has
11660 : : non-external linkage. */
11661 : 10082907 : TREE_PUBLIC (decl) = 1;
11662 : 10082907 : TREE_STATIC (decl) = 1;
11663 : : /* For non-template classes, static data members are always put
11664 : : out in exactly those files where they are defined, just as
11665 : : with ordinary namespace-scope variables. */
11666 : 10082907 : if (!processing_template_decl)
11667 : 7476481 : DECL_INTERFACE_KNOWN (decl) = 1;
11668 : 10082907 : }
11669 : :
11670 : : /* Create a VAR_DECL named NAME with the indicated TYPE.
11671 : :
11672 : : If SCOPE is non-NULL, it is the class type or namespace containing
11673 : : the variable. If SCOPE is NULL, the variable should is created in
11674 : : the innermost enclosing scope. */
11675 : :
11676 : : static tree
11677 : 54063325 : grokvardecl (tree type,
11678 : : tree name,
11679 : : tree orig_declarator,
11680 : : const cp_decl_specifier_seq *declspecs,
11681 : : int initialized,
11682 : : int type_quals,
11683 : : int inlinep,
11684 : : bool conceptp,
11685 : : int template_count,
11686 : : tree scope,
11687 : : location_t location)
11688 : : {
11689 : 54063325 : tree decl;
11690 : 54063325 : tree explicit_scope;
11691 : :
11692 : 54063325 : gcc_assert (!name || identifier_p (name));
11693 : :
11694 : 54063325 : bool constp = (type_quals & TYPE_QUAL_CONST) != 0;
11695 : 54063325 : bool volatilep = (type_quals & TYPE_QUAL_VOLATILE) != 0;
11696 : :
11697 : : /* Compute the scope in which to place the variable, but remember
11698 : : whether or not that scope was explicitly specified by the user. */
11699 : 54063325 : explicit_scope = scope;
11700 : 54063325 : if (!scope)
11701 : : {
11702 : : /* An explicit "extern" specifier indicates a namespace-scope
11703 : : variable. */
11704 : 53688780 : if (declspecs->storage_class == sc_extern)
11705 : 550242 : scope = current_decl_namespace ();
11706 : 53138538 : else if (!at_function_scope_p ())
11707 : 4077154 : scope = current_scope ();
11708 : : }
11709 : :
11710 : 53688780 : if (scope
11711 : 5001941 : && (/* If the variable is a namespace-scope variable declared in a
11712 : : template, we need DECL_LANG_SPECIFIC. */
11713 : 5001941 : (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
11714 : : /* Similarly for namespace-scope variables with language linkage
11715 : : other than C++. */
11716 : 4630275 : || (TREE_CODE (scope) == NAMESPACE_DECL
11717 : 2369288 : && current_lang_name != lang_name_cplusplus)
11718 : : /* Similarly for static data members. */
11719 : 2511846 : || TYPE_P (scope)
11720 : : /* Similarly for explicit specializations. */
11721 : 2140180 : || (orig_declarator
11722 : 2139827 : && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)))
11723 : 3190993 : decl = build_lang_decl_loc (location, VAR_DECL, name, type);
11724 : : else
11725 : 50872332 : decl = build_decl (location, VAR_DECL, name, type);
11726 : :
11727 : 54063325 : if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
11728 : 2879 : set_decl_namespace (decl, explicit_scope, 0);
11729 : : else
11730 : 54060446 : DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
11731 : :
11732 : 54063325 : if (declspecs->storage_class == sc_extern)
11733 : : {
11734 : 550242 : DECL_THIS_EXTERN (decl) = 1;
11735 : 550242 : DECL_EXTERNAL (decl) = !initialized;
11736 : : }
11737 : :
11738 : 54063325 : if (DECL_CLASS_SCOPE_P (decl))
11739 : : {
11740 : 371666 : set_linkage_for_static_data_member (decl);
11741 : : /* This function is only called with out-of-class definitions. */
11742 : 371666 : DECL_EXTERNAL (decl) = 0;
11743 : 371666 : check_class_member_definition_namespace (decl);
11744 : : }
11745 : : /* At top level, either `static' or no s.c. makes a definition
11746 : : (perhaps tentative), and absence of `static' makes it public. */
11747 : 53691659 : else if (toplevel_bindings_p ())
11748 : : {
11749 : 9258274 : TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
11750 : 4629137 : && (DECL_THIS_EXTERN (decl)
11751 : 4041410 : || ! constp
11752 : 4041410 : || volatilep
11753 : 3968570 : || inlinep
11754 : 255756 : || in_template_context
11755 : 27172 : || processing_specialization
11756 : 27093 : || module_attach_p ()));
11757 : 4629137 : TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
11758 : : }
11759 : : /* Not at top level, only `static' makes a static definition. */
11760 : : else
11761 : : {
11762 : 49062522 : TREE_STATIC (decl) = declspecs->storage_class == sc_static;
11763 : 49062522 : TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
11764 : : }
11765 : :
11766 : 54063325 : set_originating_module (decl);
11767 : :
11768 : 54063325 : if (decl_spec_seq_has_spec_p (declspecs, ds_thread))
11769 : : {
11770 : 20054 : if (DECL_EXTERNAL (decl) || TREE_STATIC (decl))
11771 : : {
11772 : 20046 : CP_DECL_THREAD_LOCAL_P (decl) = true;
11773 : 20046 : if (!processing_template_decl)
11774 : 20015 : set_decl_tls_model (decl, decl_default_tls_model (decl));
11775 : : }
11776 : 20054 : if (declspecs->gnu_thread_keyword_p)
11777 : 19204 : SET_DECL_GNU_TLS_P (decl);
11778 : : }
11779 : :
11780 : : /* If the type of the decl has no linkage, make sure that we'll
11781 : : notice that in mark_used. */
11782 : 54063325 : if (cxx_dialect > cxx98
11783 : 53826546 : && decl_linkage (decl) != lk_none
11784 : 53288581 : && DECL_LANG_SPECIFIC (decl) == NULL
11785 : 50028982 : && !DECL_EXTERN_C_P (decl)
11786 : 104092307 : && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
11787 : 3330 : retrofit_lang_decl (decl);
11788 : :
11789 : 54063325 : if (TREE_PUBLIC (decl))
11790 : : {
11791 : : /* [basic.link]: A name with no linkage (notably, the name of a class
11792 : : or enumeration declared in a local scope) shall not be used to
11793 : : declare an entity with linkage.
11794 : :
11795 : : DR 757 relaxes this restriction for C++0x. */
11796 : 4936246 : if (cxx_dialect < cxx11)
11797 : 20411 : no_linkage_error (decl);
11798 : : }
11799 : : else
11800 : 49127079 : DECL_INTERFACE_KNOWN (decl) = 1;
11801 : :
11802 : 54063325 : if (DECL_NAME (decl)
11803 : 54063325 : && MAIN_NAME_P (DECL_NAME (decl)))
11804 : : {
11805 : 12 : if (scope == global_namespace)
11806 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
11807 : : "cannot declare %<::main%> to be a global variable");
11808 : 6 : else if (DECL_EXTERN_C_P (decl))
11809 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
11810 : : "an entity named %<main%> cannot be declared with "
11811 : : "C language linkage");
11812 : : }
11813 : :
11814 : : /* Check if a variable is being declared as a concept. */
11815 : 54063325 : if (conceptp)
11816 : : {
11817 : 27 : if (!processing_template_decl)
11818 : 11 : error_at (declspecs->locations[ds_concept],
11819 : : "a non-template variable cannot be %<concept%>");
11820 : 16 : else if (!at_namespace_scope_p ())
11821 : 1 : error_at (declspecs->locations[ds_concept],
11822 : : "concept must be defined at namespace scope");
11823 : : else
11824 : 15 : error_at (declspecs->locations[ds_concept],
11825 : : "variable concepts are no longer supported");
11826 : 27 : return NULL_TREE;
11827 : : }
11828 : 54063298 : else if (flag_concepts
11829 : 54063298 : && current_template_depth > template_class_depth (scope))
11830 : : {
11831 : 14164659 : tree ci = current_template_constraints ();
11832 : 14164659 : set_constraints (decl, ci);
11833 : : }
11834 : :
11835 : : // Handle explicit specializations and instantiations of variable templates.
11836 : 54063298 : if (orig_declarator)
11837 : 53518493 : decl = check_explicit_specialization (orig_declarator, decl,
11838 : : template_count, 0);
11839 : :
11840 : 54063298 : return decl != error_mark_node ? decl : NULL_TREE;
11841 : : }
11842 : :
11843 : : /* Create and return a canonical pointer to member function type, for
11844 : : TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
11845 : :
11846 : : tree
11847 : 3469033 : build_ptrmemfunc_type (tree type)
11848 : : {
11849 : 3469033 : tree field, fields;
11850 : 3469033 : tree t;
11851 : :
11852 : 3469033 : if (type == error_mark_node)
11853 : : return type;
11854 : :
11855 : : /* Make sure that we always have the unqualified pointer-to-member
11856 : : type first. */
11857 : 3469033 : if (cp_cv_quals quals = cp_type_quals (type))
11858 : : {
11859 : 0 : tree unqual = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
11860 : 0 : return cp_build_qualified_type (unqual, quals);
11861 : : }
11862 : :
11863 : : /* If a canonical type already exists for this type, use it. We use
11864 : : this method instead of type_hash_canon, because it only does a
11865 : : simple equality check on the list of field members. */
11866 : :
11867 : 3469033 : t = TYPE_PTRMEMFUNC_TYPE (type);
11868 : 3469033 : if (t)
11869 : : return t;
11870 : :
11871 : 1102378 : t = make_node (RECORD_TYPE);
11872 : :
11873 : : /* Let the front end know this is a pointer to member function. */
11874 : 1102378 : TYPE_PTRMEMFUNC_FLAG (t) = 1;
11875 : :
11876 : 1102378 : field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
11877 : 1102378 : DECL_NONADDRESSABLE_P (field) = 1;
11878 : 1102378 : fields = field;
11879 : :
11880 : 1102378 : field = build_decl (input_location, FIELD_DECL, delta_identifier,
11881 : : delta_type_node);
11882 : 1102378 : DECL_NONADDRESSABLE_P (field) = 1;
11883 : 1102378 : DECL_CHAIN (field) = fields;
11884 : 1102378 : fields = field;
11885 : :
11886 : 1102378 : finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
11887 : :
11888 : : /* Zap out the name so that the back end will give us the debugging
11889 : : information for this anonymous RECORD_TYPE. */
11890 : 1102378 : TYPE_NAME (t) = NULL_TREE;
11891 : :
11892 : : /* Cache this pointer-to-member type so that we can find it again
11893 : : later. */
11894 : 1102378 : TYPE_PTRMEMFUNC_TYPE (type) = t;
11895 : :
11896 : 1102378 : if (TYPE_STRUCTURAL_EQUALITY_P (type))
11897 : 597104 : SET_TYPE_STRUCTURAL_EQUALITY (t);
11898 : 505274 : else if (TYPE_CANONICAL (type) != type)
11899 : 326488 : TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
11900 : :
11901 : : return t;
11902 : : }
11903 : :
11904 : : /* Create and return a pointer to data member type. */
11905 : :
11906 : : tree
11907 : 307427 : build_ptrmem_type (tree class_type, tree member_type)
11908 : : {
11909 : 307427 : if (TREE_CODE (member_type) == METHOD_TYPE)
11910 : : {
11911 : 60987 : cp_cv_quals quals = type_memfn_quals (member_type);
11912 : 60987 : cp_ref_qualifier rqual = type_memfn_rqual (member_type);
11913 : 60987 : member_type = build_memfn_type (member_type, class_type, quals, rqual);
11914 : 60987 : return build_ptrmemfunc_type (build_pointer_type (member_type));
11915 : : }
11916 : : else
11917 : : {
11918 : 246440 : gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
11919 : 246440 : return build_offset_type (class_type, member_type);
11920 : : }
11921 : : }
11922 : :
11923 : : /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
11924 : : Check to see that the definition is valid. Issue appropriate error
11925 : : messages. */
11926 : :
11927 : : static void
11928 : 12902119 : check_static_variable_definition (tree decl, tree type)
11929 : : {
11930 : : /* Avoid redundant diagnostics on out-of-class definitions. */
11931 : 12902119 : if (!current_class_type || !TYPE_BEING_DEFINED (current_class_type))
11932 : : ;
11933 : : /* Can't check yet if we don't know the type. */
11934 : 12005706 : else if (dependent_type_p (type))
11935 : : ;
11936 : : /* If DECL is declared constexpr, we'll do the appropriate checks
11937 : : in check_initializer. Similarly for inline static data members. */
11938 : 11798464 : else if (DECL_P (decl)
11939 : 11798464 : && (DECL_DECLARED_CONSTEXPR_P (decl)
11940 : 2321103 : || DECL_VAR_DECLARED_INLINE_P (decl)))
11941 : : ;
11942 : 2320680 : else if (cxx_dialect >= cxx11 && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
11943 : : {
11944 : 52 : if (!COMPLETE_TYPE_P (type))
11945 : 11 : error_at (DECL_SOURCE_LOCATION (decl),
11946 : : "in-class initialization of static data member %q#D of "
11947 : : "incomplete type", decl);
11948 : 41 : else if (literal_type_p (type))
11949 : 35 : permerror (DECL_SOURCE_LOCATION (decl),
11950 : : "%<constexpr%> needed for in-class initialization of "
11951 : : "static data member %q#D of non-integral type", decl);
11952 : : else
11953 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
11954 : : "in-class initialization of static data member %q#D of "
11955 : : "non-literal type", decl);
11956 : : }
11957 : : /* Motion 10 at San Diego: If a static const integral data member is
11958 : : initialized with an integral constant expression, the initializer
11959 : : may appear either in the declaration (within the class), or in
11960 : : the definition, but not both. If it appears in the class, the
11961 : : member is a member constant. The file-scope definition is always
11962 : : required. */
11963 : 2320628 : else if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
11964 : 11 : error_at (DECL_SOURCE_LOCATION (decl),
11965 : : "invalid in-class initialization of static data member "
11966 : : "of non-integral type %qT",
11967 : : type);
11968 : 2320617 : else if (!CP_TYPE_CONST_P (type))
11969 : 5 : error_at (DECL_SOURCE_LOCATION (decl),
11970 : : "ISO C++ forbids in-class initialization of non-const "
11971 : : "static member %qD",
11972 : : decl);
11973 : 2320612 : else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
11974 : 5 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wpedantic,
11975 : : "ISO C++ forbids initialization of member constant "
11976 : : "%qD of non-integral type %qT", decl, type);
11977 : 12902119 : }
11978 : :
11979 : : /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
11980 : : SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
11981 : : expressions out into temporary variables so that walk_tree doesn't
11982 : : step into them (c++/15764). */
11983 : :
11984 : : static tree
11985 : 3144 : stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
11986 : : {
11987 : 3144 : hash_set<tree> *pset = (hash_set<tree> *)data;
11988 : 3144 : tree expr = *expr_p;
11989 : 3144 : if (TREE_CODE (expr) == SAVE_EXPR)
11990 : : {
11991 : 1353 : tree op = TREE_OPERAND (expr, 0);
11992 : 1353 : cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
11993 : 1353 : if (TREE_SIDE_EFFECTS (op))
11994 : 56 : TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
11995 : 1353 : *walk_subtrees = 0;
11996 : : }
11997 : 1791 : else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
11998 : 1616 : *walk_subtrees = 0;
11999 : 3144 : return NULL;
12000 : : }
12001 : :
12002 : : /* Entry point for the above. */
12003 : :
12004 : : static void
12005 : 1412 : stabilize_vla_size (tree size)
12006 : : {
12007 : 1412 : hash_set<tree> pset;
12008 : : /* Break out any function calls into temporary variables. */
12009 : 1412 : cp_walk_tree (&size, stabilize_save_expr_r, &pset, &pset);
12010 : 1412 : }
12011 : :
12012 : : /* Reduce a SIZEOF_EXPR to its value. */
12013 : :
12014 : : tree
12015 : 10789773 : fold_sizeof_expr (tree t)
12016 : : {
12017 : 10789773 : tree r;
12018 : 10789773 : if (SIZEOF_EXPR_TYPE_P (t))
12019 : 10096949 : r = cxx_sizeof_or_alignof_type (EXPR_LOCATION (t),
12020 : 10096949 : TREE_TYPE (TREE_OPERAND (t, 0)),
12021 : : SIZEOF_EXPR, false, false);
12022 : 692824 : else if (TYPE_P (TREE_OPERAND (t, 0)))
12023 : 0 : r = cxx_sizeof_or_alignof_type (EXPR_LOCATION (t),
12024 : 0 : TREE_OPERAND (t, 0), SIZEOF_EXPR,
12025 : : false, false);
12026 : : else
12027 : 692824 : r = cxx_sizeof_or_alignof_expr (EXPR_LOCATION (t),
12028 : 692824 : TREE_OPERAND (t, 0), SIZEOF_EXPR,
12029 : : false, false);
12030 : 10789773 : if (r == error_mark_node)
12031 : 66 : r = size_one_node;
12032 : 10789773 : r = cp_fold_convert (size_type_node, r);
12033 : 10789773 : return r;
12034 : : }
12035 : :
12036 : : /* Given the SIZE (i.e., number of elements) in an array, compute
12037 : : an appropriate index type for the array. If non-NULL, NAME is
12038 : : the name of the entity being declared. */
12039 : :
12040 : : static tree
12041 : 2615731 : compute_array_index_type_loc (location_t name_loc, tree name, tree size,
12042 : : tsubst_flags_t complain)
12043 : : {
12044 : 2615731 : if (error_operand_p (size))
12045 : 37 : return error_mark_node;
12046 : :
12047 : : /* The type of the index being computed. */
12048 : 2615694 : tree itype;
12049 : :
12050 : : /* The original numeric size as seen in the source code before
12051 : : conversion to size_t. */
12052 : 2615694 : tree origsize = size;
12053 : :
12054 : 2615694 : location_t loc = cp_expr_loc_or_loc (size, name ? name_loc : input_location);
12055 : :
12056 : 2615694 : if (!type_dependent_expression_p (size))
12057 : : {
12058 : 2578001 : origsize = size = mark_rvalue_use (size);
12059 : :
12060 : 33401 : if (cxx_dialect < cxx11 && TREE_CODE (size) == NOP_EXPR
12061 : 2578157 : && TREE_SIDE_EFFECTS (size))
12062 : : /* In C++98, we mark a non-constant array bound with a magic
12063 : : NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
12064 : : else
12065 : : {
12066 : 2578000 : size = build_converted_constant_expr (size_type_node, size, complain);
12067 : : /* Pedantically a constant expression is required here and so
12068 : : __builtin_is_constant_evaluated () should fold to true if it
12069 : : is successfully folded into a constant. */
12070 : 2578000 : size = fold_non_dependent_expr (size, complain,
12071 : : /*manifestly_const_eval=*/true);
12072 : :
12073 : 2578000 : if (!TREE_CONSTANT (size))
12074 : 99405 : size = origsize;
12075 : : }
12076 : :
12077 : 2578001 : if (error_operand_p (size))
12078 : 3 : return error_mark_node;
12079 : :
12080 : : /* The array bound must be an integer type. */
12081 : 2577998 : tree type = TREE_TYPE (size);
12082 : 2577998 : if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
12083 : : {
12084 : 21 : if (!(complain & tf_error))
12085 : 0 : return error_mark_node;
12086 : 21 : if (name)
12087 : 18 : error_at (loc, "size of array %qD has non-integral type %qT",
12088 : : name, type);
12089 : : else
12090 : 3 : error_at (loc, "size of array has non-integral type %qT", type);
12091 : 21 : size = integer_one_node;
12092 : : }
12093 : : }
12094 : :
12095 : : /* A type is dependent if it is...an array type constructed from any
12096 : : dependent type or whose size is specified by a constant expression
12097 : : that is value-dependent. */
12098 : : /* We can only call value_dependent_expression_p on integral constant
12099 : : expressions. */
12100 : 2615691 : if (processing_template_decl
12101 : 1092758 : && potential_constant_expression (size)
12102 : 3708424 : && value_dependent_expression_p (size))
12103 : : {
12104 : : /* Just build the index type and mark that it requires
12105 : : structural equality checks. */
12106 : 630709 : in_template:
12107 : 630709 : itype = build_index_type (build_min (MINUS_EXPR, sizetype,
12108 : : size, size_one_node));
12109 : 630709 : TYPE_DEPENDENT_P (itype) = 1;
12110 : 630709 : TYPE_DEPENDENT_P_VALID (itype) = 1;
12111 : 630709 : SET_TYPE_STRUCTURAL_EQUALITY (itype);
12112 : 630709 : return itype;
12113 : : }
12114 : :
12115 : 1985091 : if (TREE_CODE (size) != INTEGER_CST)
12116 : : {
12117 : 1914 : tree folded = cp_fully_fold (size);
12118 : 1914 : if (TREE_CODE (folded) == INTEGER_CST)
12119 : : {
12120 : 204 : if (name)
12121 : 130 : pedwarn (loc, OPT_Wpedantic, "size of array %qD is not an "
12122 : : "integral constant-expression", name);
12123 : : else
12124 : 74 : pedwarn (loc, OPT_Wpedantic,
12125 : : "size of array is not an integral constant-expression");
12126 : : }
12127 : 1914 : if (TREE_CONSTANT (size) && !TREE_CONSTANT (folded))
12128 : : /* We might have lost the TREE_CONSTANT flag e.g. when we are
12129 : : folding a conversion from a pointer to integral type. In that
12130 : : case issue an error below and don't treat this as a VLA. */;
12131 : : else
12132 : : /* Use the folded result for VLAs, too; it will have resolved
12133 : : SIZEOF_EXPR. */
12134 : : size = folded;
12135 : : }
12136 : :
12137 : : /* Normally, the array-bound will be a constant. */
12138 : 1985091 : if (TREE_CODE (size) == INTEGER_CST)
12139 : : {
12140 : : /* The size to use in diagnostics that reflects the constant
12141 : : size used in the source, rather than SIZE massaged above. */
12142 : 1983381 : tree diagsize = size;
12143 : :
12144 : : /* If the original size before conversion to size_t was signed
12145 : : and negative, convert it to ssizetype to restore the sign. */
12146 : 1983381 : if (!TYPE_UNSIGNED (TREE_TYPE (origsize))
12147 : : && TREE_CODE (size) == INTEGER_CST
12148 : 1983381 : && tree_int_cst_sign_bit (size))
12149 : : {
12150 : 223 : diagsize = fold_convert (ssizetype, size);
12151 : :
12152 : : /* Clear the overflow bit that may have been set as a result
12153 : : of the conversion from the sizetype of the new size to
12154 : : ssizetype. */
12155 : 223 : TREE_OVERFLOW (diagsize) = false;
12156 : : }
12157 : :
12158 : : /* Verify that the array has a positive number of elements
12159 : : and issue the appropriate diagnostic if it doesn't. */
12160 : 1983381 : if (!valid_array_size_p (loc, diagsize, name, (complain & tf_error)))
12161 : : {
12162 : 454 : if (!(complain & tf_error))
12163 : 15 : return error_mark_node;
12164 : 439 : size = integer_one_node;
12165 : : }
12166 : : /* As an extension we allow zero-sized arrays. */
12167 : 1982927 : else if (integer_zerop (size))
12168 : : {
12169 : 3135 : if (!(complain & tf_error))
12170 : : /* We must fail if performing argument deduction (as
12171 : : indicated by the state of complain), so that
12172 : : another substitution can be found. */
12173 : 8 : return error_mark_node;
12174 : 3127 : else if (name)
12175 : 2863 : pedwarn (loc, OPT_Wpedantic,
12176 : : "ISO C++ forbids zero-size array %qD", name);
12177 : : else
12178 : 264 : pedwarn (loc, OPT_Wpedantic,
12179 : : "ISO C++ forbids zero-size array");
12180 : : }
12181 : : }
12182 : 1710 : else if (TREE_CONSTANT (size)
12183 : : /* We don't allow VLAs at non-function scopes, or during
12184 : : tentative template substitution. */
12185 : 1695 : || !at_function_scope_p ()
12186 : 3237 : || !(complain & tf_error))
12187 : : {
12188 : 189 : if (!(complain & tf_error))
12189 : 144 : return error_mark_node;
12190 : : /* `(int) &fn' is not a valid array bound. */
12191 : 45 : if (name)
12192 : 37 : error_at (loc,
12193 : : "size of array %qD is not an integral constant-expression",
12194 : : name);
12195 : : else
12196 : 8 : error_at (loc, "size of array is not an integral constant-expression");
12197 : 45 : size = integer_one_node;
12198 : : }
12199 : 1521 : else if (pedantic && warn_vla != 0)
12200 : : {
12201 : 30 : if (name)
12202 : 15 : pedwarn (name_loc, OPT_Wvla,
12203 : : "ISO C++ forbids variable length array %qD", name);
12204 : : else
12205 : 15 : pedwarn (input_location, OPT_Wvla,
12206 : : "ISO C++ forbids variable length array");
12207 : : }
12208 : 1491 : else if (warn_vla > 0)
12209 : : {
12210 : 3 : if (name)
12211 : 3 : warning_at (name_loc, OPT_Wvla,
12212 : : "variable length array %qD is used", name);
12213 : : else
12214 : 0 : warning (OPT_Wvla,
12215 : : "variable length array is used");
12216 : : }
12217 : :
12218 : 1984924 : if (processing_template_decl && !TREE_CONSTANT (size))
12219 : 109 : goto in_template;
12220 : : else
12221 : : {
12222 : 1984815 : if (!TREE_CONSTANT (size))
12223 : : {
12224 : : /* A variable sized array. Arrange for the SAVE_EXPR on the inside
12225 : : of the MINUS_EXPR, which allows the -1 to get folded with the +1
12226 : : that happens when building TYPE_SIZE. */
12227 : 1412 : size = variable_size (size);
12228 : 1412 : stabilize_vla_size (size);
12229 : : }
12230 : :
12231 : : /* Compute the index of the largest element in the array. It is
12232 : : one less than the number of elements in the array. We save
12233 : : and restore PROCESSING_TEMPLATE_DECL so that computations in
12234 : : cp_build_binary_op will be appropriately folded. */
12235 : 1984815 : {
12236 : 1984815 : processing_template_decl_sentinel s;
12237 : 1984815 : itype = cp_build_binary_op (input_location,
12238 : : MINUS_EXPR,
12239 : : cp_convert (ssizetype, size, complain),
12240 : : cp_convert (ssizetype, integer_one_node,
12241 : : complain),
12242 : : complain);
12243 : 1984815 : itype = maybe_constant_value (itype, NULL_TREE, mce_true);
12244 : 1984815 : }
12245 : :
12246 : 1984815 : if (!TREE_CONSTANT (itype))
12247 : : {
12248 : 1412 : if (sanitize_flags_p (SANITIZE_VLA)
12249 : 1412 : && current_function_decl != NULL_TREE)
12250 : : {
12251 : : /* We have to add 1 -- in the ubsan routine we generate
12252 : : LE_EXPR rather than LT_EXPR. */
12253 : 69 : tree t = fold_build2 (PLUS_EXPR, TREE_TYPE (itype), itype,
12254 : : build_one_cst (TREE_TYPE (itype)));
12255 : 69 : t = ubsan_instrument_vla (input_location, t);
12256 : 69 : finish_expr_stmt (t);
12257 : : }
12258 : : }
12259 : : /* Make sure that there was no overflow when creating to a signed
12260 : : index type. (For example, on a 32-bit machine, an array with
12261 : : size 2^32 - 1 is too big.) */
12262 : 1983403 : else if (TREE_CODE (itype) == INTEGER_CST
12263 : 1983403 : && TREE_OVERFLOW (itype))
12264 : : {
12265 : 0 : if (!(complain & tf_error))
12266 : 0 : return error_mark_node;
12267 : 0 : error ("overflow in array dimension");
12268 : 0 : TREE_OVERFLOW (itype) = 0;
12269 : : }
12270 : : }
12271 : :
12272 : : /* Create and return the appropriate index type. */
12273 : 1984815 : itype = build_index_type (itype);
12274 : :
12275 : : /* If the index type were dependent, we would have returned early, so
12276 : : remember that it isn't. */
12277 : 1984815 : TYPE_DEPENDENT_P (itype) = 0;
12278 : 1984815 : TYPE_DEPENDENT_P_VALID (itype) = 1;
12279 : 1984815 : return itype;
12280 : : }
12281 : :
12282 : : tree
12283 : 299200 : compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
12284 : : {
12285 : 299200 : return compute_array_index_type_loc (input_location, name, size, complain);
12286 : : }
12287 : :
12288 : : /* Returns the scope (if any) in which the entity declared by
12289 : : DECLARATOR will be located. If the entity was declared with an
12290 : : unqualified name, NULL_TREE is returned. */
12291 : :
12292 : : tree
12293 : 655438758 : get_scope_of_declarator (const cp_declarator *declarator)
12294 : : {
12295 : 765042984 : while (declarator && declarator->kind != cdk_id)
12296 : 109604226 : declarator = declarator->declarator;
12297 : :
12298 : : /* If the declarator-id is a SCOPE_REF, the scope in which the
12299 : : declaration occurs is the first operand. */
12300 : 655438758 : if (declarator
12301 : 654202840 : && declarator->u.id.qualifying_scope)
12302 : : return declarator->u.id.qualifying_scope;
12303 : :
12304 : : /* Otherwise, the declarator is not a qualified name; the entity will
12305 : : be declared in the current scope. */
12306 : : return NULL_TREE;
12307 : : }
12308 : :
12309 : : /* Returns an ARRAY_TYPE for an array with SIZE elements of the
12310 : : indicated TYPE. If non-NULL, NAME is the NAME of the declaration
12311 : : with this type. */
12312 : :
12313 : : static tree
12314 : 3006284 : create_array_type_for_decl (tree name, tree type, tree size, location_t loc)
12315 : : {
12316 : 3006284 : tree itype = NULL_TREE;
12317 : :
12318 : : /* If things have already gone awry, bail now. */
12319 : 3006284 : if (type == error_mark_node || size == error_mark_node)
12320 : : return error_mark_node;
12321 : :
12322 : : /* [dcl.type.class.deduct] prohibits forming an array of placeholder
12323 : : for a deduced class type. */
12324 : 3006221 : if (template_placeholder_p (type))
12325 : : {
12326 : 6 : if (name)
12327 : 0 : error_at (loc, "%qD declared as array of template placeholder "
12328 : : "type %qT", name, type);
12329 : : else
12330 : 6 : error ("creating array of template placeholder type %qT", type);
12331 : 6 : return error_mark_node;
12332 : : }
12333 : :
12334 : : /* If there are some types which cannot be array elements,
12335 : : issue an error-message and return. */
12336 : 3006215 : switch (TREE_CODE (type))
12337 : : {
12338 : 3 : case VOID_TYPE:
12339 : 3 : if (name)
12340 : 0 : error_at (loc, "declaration of %qD as array of void", name);
12341 : : else
12342 : 3 : error ("creating array of void");
12343 : 3 : return error_mark_node;
12344 : :
12345 : 6 : case FUNCTION_TYPE:
12346 : 6 : if (name)
12347 : 6 : error_at (loc, "declaration of %qD as array of functions", name);
12348 : : else
12349 : 0 : error ("creating array of functions");
12350 : 6 : return error_mark_node;
12351 : :
12352 : 21 : case REFERENCE_TYPE:
12353 : 21 : if (name)
12354 : 15 : error_at (loc, "declaration of %qD as array of references", name);
12355 : : else
12356 : 6 : error ("creating array of references");
12357 : 21 : return error_mark_node;
12358 : :
12359 : 0 : case METHOD_TYPE:
12360 : 0 : if (name)
12361 : 0 : error_at (loc, "declaration of %qD as array of function members",
12362 : : name);
12363 : : else
12364 : 0 : error ("creating array of function members");
12365 : 0 : return error_mark_node;
12366 : :
12367 : 3006185 : default:
12368 : 3006185 : break;
12369 : : }
12370 : :
12371 : 3006185 : if (!verify_type_context (name ? loc : input_location,
12372 : : TCTX_ARRAY_ELEMENT, type))
12373 : 0 : return error_mark_node;
12374 : :
12375 : : /* [dcl.array]
12376 : :
12377 : : The constant expressions that specify the bounds of the arrays
12378 : : can be omitted only for the first member of the sequence. */
12379 : 3006185 : if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
12380 : : {
12381 : 30 : if (name)
12382 : 24 : error_at (loc, "declaration of %qD as multidimensional array must "
12383 : : "have bounds for all dimensions except the first",
12384 : : name);
12385 : : else
12386 : 6 : error ("multidimensional array must have bounds for all "
12387 : : "dimensions except the first");
12388 : :
12389 : 30 : return error_mark_node;
12390 : : }
12391 : :
12392 : : /* Figure out the index type for the array. */
12393 : 3006155 : if (size)
12394 : : {
12395 : 2316531 : itype = compute_array_index_type_loc (loc, name, size,
12396 : : tf_warning_or_error);
12397 : 2316531 : if (type_uses_auto (type)
12398 : 2316531 : && variably_modified_type_p (itype, /*fn=*/NULL_TREE))
12399 : : {
12400 : 9 : sorry_at (loc, "variable-length array of %<auto%>");
12401 : 9 : return error_mark_node;
12402 : : }
12403 : : }
12404 : :
12405 : 3006146 : return build_cplus_array_type (type, itype);
12406 : : }
12407 : :
12408 : : /* Returns the smallest location that is not UNKNOWN_LOCATION. */
12409 : :
12410 : : static location_t
12411 : 881750623 : min_location (location_t loca, location_t locb)
12412 : : {
12413 : 881750623 : if (loca == UNKNOWN_LOCATION
12414 : 881750623 : || (locb != UNKNOWN_LOCATION
12415 : 98341449 : && linemap_location_before_p (line_table, locb, loca)))
12416 : 784751367 : return locb;
12417 : : return loca;
12418 : : }
12419 : :
12420 : : /* Returns the smallest location != UNKNOWN_LOCATION among the
12421 : : three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
12422 : : and LOCATIONS[ds_restrict]. */
12423 : :
12424 : : static location_t
12425 : 880226722 : smallest_type_quals_location (int type_quals, const location_t* locations)
12426 : : {
12427 : 880226722 : location_t loc = UNKNOWN_LOCATION;
12428 : :
12429 : 880226722 : if (type_quals & TYPE_QUAL_CONST)
12430 : 97022133 : loc = locations[ds_const];
12431 : :
12432 : 880226722 : if (type_quals & TYPE_QUAL_VOLATILE)
12433 : 1523810 : loc = min_location (loc, locations[ds_volatile]);
12434 : :
12435 : 880226722 : if (type_quals & TYPE_QUAL_RESTRICT)
12436 : 43 : loc = min_location (loc, locations[ds_restrict]);
12437 : :
12438 : 880226722 : return loc;
12439 : : }
12440 : :
12441 : : /* Returns the smallest among the latter and locations[ds_type_spec]. */
12442 : :
12443 : : static location_t
12444 : 880226701 : smallest_type_location (int type_quals, const location_t* locations)
12445 : : {
12446 : 880226701 : location_t loc = smallest_type_quals_location (type_quals, locations);
12447 : 880226701 : return min_location (loc, locations[ds_type_spec]);
12448 : : }
12449 : :
12450 : : static location_t
12451 : 26 : smallest_type_location (const cp_decl_specifier_seq *declspecs)
12452 : : {
12453 : 26 : int type_quals = get_type_quals (declspecs);
12454 : 26 : return smallest_type_location (type_quals, declspecs->locations);
12455 : : }
12456 : :
12457 : : /* Returns whether DECLARATOR represented a pointer or a reference and if so,
12458 : : strip out the pointer/reference declarator(s). */
12459 : :
12460 : : static bool
12461 : 26055264 : maybe_strip_indirect_ref (const cp_declarator** declarator)
12462 : : {
12463 : 26055264 : bool indirect_ref_p = false;
12464 : 52110675 : while (declarator && *declarator
12465 : 26055411 : && ((*declarator)->kind == cdk_pointer
12466 : 26055411 : || (*declarator)->kind == cdk_reference))
12467 : : {
12468 : 147 : indirect_ref_p = true;
12469 : 147 : *declarator = (*declarator)->declarator;
12470 : : }
12471 : 26055264 : return indirect_ref_p;
12472 : : }
12473 : :
12474 : : /* Check that it's OK to declare a function with the indicated TYPE, TYPE_QUALS
12475 : : and DECLARATOR. SFK indicates the kind of special function (if any) that
12476 : : this function is. OPTYPE is the type given in a conversion operator
12477 : : declaration, or the class type for a constructor/destructor.
12478 : : Returns the actual return type of the function; that may be different
12479 : : than TYPE if an error occurs, or for certain special functions. */
12480 : :
12481 : : static tree
12482 : 26055264 : check_special_function_return_type (special_function_kind sfk,
12483 : : tree type,
12484 : : tree optype,
12485 : : int type_quals,
12486 : : const cp_declarator** declarator,
12487 : : const location_t* locations)
12488 : : {
12489 : 26055264 : gcc_assert (declarator);
12490 : 26055264 : location_t rettype_loc = (type
12491 : 26055264 : ? smallest_type_location (type_quals, locations)
12492 : 26055183 : : (*declarator)->id_loc);
12493 : 26055264 : switch (sfk)
12494 : : {
12495 : 21417673 : case sfk_constructor:
12496 : 21417673 : if (maybe_strip_indirect_ref (declarator) || type)
12497 : 81 : error_at (rettype_loc,
12498 : : "return type specification for constructor invalid");
12499 : 21417592 : else if (type_quals != TYPE_UNQUALIFIED)
12500 : 15 : error_at (smallest_type_quals_location (type_quals, locations),
12501 : : "qualifiers are not allowed on constructor declaration");
12502 : :
12503 : 21417673 : if (targetm.cxx.cdtor_returns_this ())
12504 : 0 : type = build_pointer_type (optype);
12505 : : else
12506 : 21417673 : type = void_type_node;
12507 : : break;
12508 : :
12509 : 3037021 : case sfk_destructor:
12510 : 3037021 : if (maybe_strip_indirect_ref (declarator) || type)
12511 : 45 : error_at (rettype_loc,
12512 : : "return type specification for destructor invalid");
12513 : 3036976 : else if (type_quals != TYPE_UNQUALIFIED)
12514 : 3 : error_at (smallest_type_quals_location (type_quals, locations),
12515 : : "qualifiers are not allowed on destructor declaration");
12516 : :
12517 : : /* We can't use the proper return type here because we run into
12518 : : problems with ambiguous bases and covariant returns. */
12519 : 3037021 : if (targetm.cxx.cdtor_returns_this ())
12520 : 0 : type = build_pointer_type (void_type_node);
12521 : : else
12522 : 3037021 : type = void_type_node;
12523 : : break;
12524 : :
12525 : 598862 : case sfk_conversion:
12526 : 598862 : if (maybe_strip_indirect_ref (declarator) || type)
12527 : 42 : error_at (rettype_loc,
12528 : : "return type specified for %<operator %T%>", optype);
12529 : 598820 : else if (type_quals != TYPE_UNQUALIFIED)
12530 : 3 : error_at (smallest_type_quals_location (type_quals, locations),
12531 : : "qualifiers are not allowed on declaration of "
12532 : : "%<operator %T%>", optype);
12533 : :
12534 : : type = optype;
12535 : : break;
12536 : :
12537 : 1001708 : case sfk_deduction_guide:
12538 : 1001708 : if (maybe_strip_indirect_ref (declarator) || type)
12539 : 0 : error_at (rettype_loc,
12540 : : "return type specified for deduction guide");
12541 : 1001708 : else if (type_quals != TYPE_UNQUALIFIED)
12542 : 0 : error_at (smallest_type_quals_location (type_quals, locations),
12543 : : "qualifiers are not allowed on declaration of "
12544 : : "deduction guide");
12545 : 1001708 : if (TREE_CODE (optype) == TEMPLATE_TEMPLATE_PARM)
12546 : : {
12547 : 3 : error ("template template parameter %qT in declaration of "
12548 : : "deduction guide", optype);
12549 : 3 : type = error_mark_node;
12550 : : }
12551 : : else
12552 : 1001705 : type = make_template_placeholder (CLASSTYPE_TI_TEMPLATE (optype));
12553 : 27046116 : for (int i = 0; i < ds_last; ++i)
12554 : 26044408 : if (i != ds_explicit && locations[i])
12555 : 3 : error_at (locations[i],
12556 : : "%<decl-specifier%> in declaration of deduction guide");
12557 : : break;
12558 : :
12559 : 0 : default:
12560 : 0 : gcc_unreachable ();
12561 : : }
12562 : :
12563 : 26055264 : return type;
12564 : : }
12565 : :
12566 : : /* A variable or data member (whose unqualified name is IDENTIFIER)
12567 : : has been declared with the indicated TYPE. If the TYPE is not
12568 : : acceptable, issue an error message and return a type to use for
12569 : : error-recovery purposes. */
12570 : :
12571 : : tree
12572 : 272183221 : check_var_type (tree identifier, tree type, location_t loc)
12573 : : {
12574 : 272183221 : if (VOID_TYPE_P (type))
12575 : : {
12576 : 88 : if (!identifier)
12577 : 0 : error_at (loc, "unnamed variable or field declared void");
12578 : 88 : else if (identifier_p (identifier))
12579 : : {
12580 : 88 : gcc_assert (!IDENTIFIER_ANY_OP_P (identifier));
12581 : 88 : error_at (loc, "variable or field %qE declared void",
12582 : : identifier);
12583 : : }
12584 : : else
12585 : 0 : error_at (loc, "variable or field declared void");
12586 : 88 : type = error_mark_node;
12587 : : }
12588 : :
12589 : 272183221 : return type;
12590 : : }
12591 : :
12592 : : /* Handle declaring DECL as an inline variable. */
12593 : :
12594 : : static void
12595 : 3761506 : mark_inline_variable (tree decl, location_t loc)
12596 : : {
12597 : 3761506 : bool inlinep = true;
12598 : 3761506 : if (! toplevel_bindings_p ())
12599 : : {
12600 : 6 : error_at (loc, "%<inline%> specifier invalid for variable "
12601 : : "%qD declared at block scope", decl);
12602 : 6 : inlinep = false;
12603 : : }
12604 : 3761500 : else if (cxx_dialect < cxx17)
12605 : 642 : pedwarn (loc, OPT_Wc__17_extensions, "inline variables are only available "
12606 : : "with %<-std=c++17%> or %<-std=gnu++17%>");
12607 : 648 : if (inlinep)
12608 : : {
12609 : 3761500 : retrofit_lang_decl (decl);
12610 : 3761500 : SET_DECL_VAR_DECLARED_INLINE_P (decl);
12611 : : }
12612 : 3761506 : }
12613 : :
12614 : :
12615 : : /* Assign a typedef-given name to a class or enumeration type declared
12616 : : as anonymous at first. This was split out of grokdeclarator
12617 : : because it is also used in libcc1. */
12618 : :
12619 : : void
12620 : 379901 : name_unnamed_type (tree type, tree decl)
12621 : : {
12622 : 1139703 : gcc_assert (TYPE_UNNAMED_P (type));
12623 : :
12624 : : /* Replace the anonymous decl with the real decl. Be careful not to
12625 : : rename other typedefs (such as the self-reference) of type. */
12626 : 379901 : tree orig = TYPE_NAME (type);
12627 : 1138145 : for (tree t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
12628 : 758244 : if (TYPE_NAME (t) == orig)
12629 : 379901 : TYPE_NAME (t) = decl;
12630 : :
12631 : : /* If this is a typedef within a template class, the nested
12632 : : type is a (non-primary) template. The name for the
12633 : : template needs updating as well. */
12634 : 379901 : if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
12635 : 64 : DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)) = DECL_NAME (decl);
12636 : :
12637 : : /* Adjust linkage now that we aren't unnamed anymore. */
12638 : 379901 : reset_type_linkage (type);
12639 : :
12640 : : /* FIXME remangle member functions; member functions of a
12641 : : type with external linkage have external linkage. */
12642 : :
12643 : : /* Check that our job is done, and that it would fail if we
12644 : : attempted to do it again. */
12645 : 759802 : gcc_assert (!TYPE_UNNAMED_P (type));
12646 : 379901 : }
12647 : :
12648 : : /* Check that decltype(auto) was well-formed: only plain decltype(auto)
12649 : : is allowed. TYPE might contain a decltype(auto). Returns true if
12650 : : there was a problem, false otherwise. */
12651 : :
12652 : : static bool
12653 : 554985179 : check_decltype_auto (location_t loc, tree type)
12654 : : {
12655 : 554985179 : if (tree a = type_uses_auto (type))
12656 : : {
12657 : 8995283 : if (AUTO_IS_DECLTYPE (a))
12658 : : {
12659 : 311119 : if (a != type)
12660 : : {
12661 : 33 : error_at (loc, "%qT as type rather than plain "
12662 : : "%<decltype(auto)%>", type);
12663 : 33 : return true;
12664 : : }
12665 : 311086 : else if (TYPE_QUALS (type) != TYPE_UNQUALIFIED)
12666 : : {
12667 : 35 : error_at (loc, "%<decltype(auto)%> cannot be cv-qualified");
12668 : 35 : return true;
12669 : : }
12670 : : }
12671 : : }
12672 : : return false;
12673 : : }
12674 : :
12675 : : /* Issue an error about two mutually incompatible declspecs
12676 : : with the given names and locations
12677 : : e.g. "error: `signed' and `unsigned' specified together" */
12678 : :
12679 : : static void
12680 : 66 : complain_about_incompatible_declspecs (const char *name_a, location_t loc_a,
12681 : : const char *name_b, location_t loc_b)
12682 : : {
12683 : 66 : gcc_rich_location richloc (loc_a, nullptr, highlight_colors::lhs);
12684 : 66 : richloc.add_range (loc_b, SHOW_RANGE_WITHOUT_CARET,
12685 : : nullptr, highlight_colors::rhs);
12686 : 66 : pp_element_quoted_string e_name_a (name_a, highlight_colors::lhs);
12687 : 66 : pp_element_quoted_string e_name_b (name_b, highlight_colors::rhs);
12688 : 66 : error_at (&richloc, "%e and %e specified together",
12689 : : &e_name_a, &e_name_b);
12690 : 66 : }
12691 : :
12692 : : /* Given declspecs and a declarator (abstract or otherwise), determine
12693 : : the name and type of the object declared and construct a DECL node
12694 : : for it.
12695 : :
12696 : : DECLSPECS points to the representation of declaration-specifier
12697 : : sequence that precedes declarator.
12698 : :
12699 : : DECL_CONTEXT says which syntactic context this declaration is in:
12700 : : NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
12701 : : FUNCDEF for a function definition. Like NORMAL but a few different
12702 : : error messages in each case. Return value may be zero meaning
12703 : : this definition is too screwy to try to parse.
12704 : : MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
12705 : : handle member functions (which have FIELD context).
12706 : : Return value may be zero meaning this definition is too screwy to
12707 : : try to parse.
12708 : : PARM for a parameter declaration (either within a function prototype
12709 : : or before a function body). Make a PARM_DECL, or return void_type_node.
12710 : : TPARM for a template parameter declaration.
12711 : : CATCHPARM for a parameter declaration before a catch clause.
12712 : : TYPENAME if for a typename (in a cast or sizeof).
12713 : : Don't make a DECL node; just return the ..._TYPE node.
12714 : : FIELD for a struct or union field; make a FIELD_DECL.
12715 : : BITFIELD for a field with specified width.
12716 : :
12717 : : INITIALIZED is as for start_decl.
12718 : :
12719 : : ATTRLIST is a pointer to the list of attributes, which may be NULL
12720 : : if there are none; *ATTRLIST may be modified if attributes from inside
12721 : : the declarator should be applied to the declaration.
12722 : :
12723 : : When this function is called, scoping variables (such as
12724 : : CURRENT_CLASS_TYPE) should reflect the scope in which the
12725 : : declaration occurs, not the scope in which the new declaration will
12726 : : be placed. For example, on:
12727 : :
12728 : : void S::f() { ... }
12729 : :
12730 : : when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
12731 : : should not be `S'.
12732 : :
12733 : : Returns a DECL (if a declarator is present), a TYPE (if there is no
12734 : : declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
12735 : : error occurs. */
12736 : :
12737 : : tree
12738 : 880226594 : grokdeclarator (const cp_declarator *declarator,
12739 : : cp_decl_specifier_seq *declspecs,
12740 : : enum decl_context decl_context,
12741 : : int initialized,
12742 : : tree* attrlist)
12743 : : {
12744 : 880226594 : tree type = NULL_TREE;
12745 : 880226594 : int longlong = 0;
12746 : 880226594 : int explicit_intN = 0;
12747 : 880226594 : int int_n_alt = 0;
12748 : 880226594 : int virtualp, explicitp, friendp, inlinep, staticp;
12749 : 880226594 : int explicit_int = 0;
12750 : 880226594 : int explicit_char = 0;
12751 : 880226594 : int defaulted_int = 0;
12752 : :
12753 : 880226594 : tree typedef_decl = NULL_TREE;
12754 : 880226594 : const char *name = NULL;
12755 : 880226594 : tree typedef_type = NULL_TREE;
12756 : : /* True if this declarator is a function definition. */
12757 : 880226594 : bool funcdef_flag = false;
12758 : 880226594 : cp_declarator_kind innermost_code = cdk_error;
12759 : 880226594 : int bitfield = 0;
12760 : : #if 0
12761 : : /* See the code below that used this. */
12762 : : tree decl_attr = NULL_TREE;
12763 : : #endif
12764 : :
12765 : : /* Keep track of what sort of function is being processed
12766 : : so that we can warn about default return values, or explicit
12767 : : return values which do not match prescribed defaults. */
12768 : 880226594 : special_function_kind sfk = sfk_none;
12769 : :
12770 : 880226594 : tree dname = NULL_TREE;
12771 : 880226594 : tree ctor_return_type = NULL_TREE;
12772 : 880226594 : enum overload_flags flags = NO_SPECIAL;
12773 : : /* cv-qualifiers that apply to the declarator, for a declaration of
12774 : : a member function. */
12775 : 880226594 : cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
12776 : : /* virt-specifiers that apply to the declarator, for a declaration of
12777 : : a member function. */
12778 : 880226594 : cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
12779 : : /* ref-qualifier that applies to the declarator, for a declaration of
12780 : : a member function. */
12781 : 880226594 : cp_ref_qualifier rqual = REF_QUAL_NONE;
12782 : : /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
12783 : 880226594 : int type_quals = get_type_quals (declspecs);
12784 : 880226594 : tree raises = NULL_TREE;
12785 : 880226594 : int template_count = 0;
12786 : 880226594 : tree returned_attrs = NULL_TREE;
12787 : 880226594 : tree parms = NULL_TREE;
12788 : 880226594 : const cp_declarator *id_declarator;
12789 : : /* The unqualified name of the declarator; either an
12790 : : IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
12791 : 880226594 : tree unqualified_id;
12792 : : /* The class type, if any, in which this entity is located,
12793 : : or NULL_TREE if none. Note that this value may be different from
12794 : : the current class type; for example if an attempt is made to declare
12795 : : "A::f" inside "B", this value will be "A". */
12796 : 880226594 : tree ctype = current_class_type;
12797 : : /* The NAMESPACE_DECL for the namespace in which this entity is
12798 : : located. If an unqualified name is used to declare the entity,
12799 : : this value will be NULL_TREE, even if the entity is located at
12800 : : namespace scope. */
12801 : 880226594 : tree in_namespace = NULL_TREE;
12802 : 880226594 : cp_storage_class storage_class;
12803 : 880226594 : bool unsigned_p, signed_p, short_p, long_p, thread_p;
12804 : 880226594 : bool type_was_error_mark_node = false;
12805 : 880226594 : bool parameter_pack_p = declarator ? declarator->parameter_pack_p : false;
12806 : 880226594 : bool template_type_arg = false;
12807 : 880226594 : bool template_parm_flag = false;
12808 : 880226594 : bool typedef_p = decl_spec_seq_has_spec_p (declspecs, ds_typedef);
12809 : 880226594 : bool constexpr_p = decl_spec_seq_has_spec_p (declspecs, ds_constexpr);
12810 : 880226594 : bool constinit_p = decl_spec_seq_has_spec_p (declspecs, ds_constinit);
12811 : 880226594 : bool consteval_p = decl_spec_seq_has_spec_p (declspecs, ds_consteval);
12812 : 880226594 : bool late_return_type_p = false;
12813 : 880226594 : bool array_parameter_p = false;
12814 : 880226594 : tree reqs = NULL_TREE;
12815 : :
12816 : 880226594 : signed_p = decl_spec_seq_has_spec_p (declspecs, ds_signed);
12817 : 880226594 : unsigned_p = decl_spec_seq_has_spec_p (declspecs, ds_unsigned);
12818 : 880226594 : short_p = decl_spec_seq_has_spec_p (declspecs, ds_short);
12819 : 880226594 : long_p = decl_spec_seq_has_spec_p (declspecs, ds_long);
12820 : 880226594 : longlong = decl_spec_seq_has_spec_p (declspecs, ds_long_long);
12821 : 880226594 : explicit_intN = declspecs->explicit_intN_p;
12822 : 880226594 : int_n_alt = declspecs->int_n_alt;
12823 : 880226594 : thread_p = decl_spec_seq_has_spec_p (declspecs, ds_thread);
12824 : :
12825 : : // Was concept_p specified? Note that ds_concept
12826 : : // implies ds_constexpr!
12827 : 880226594 : bool concept_p = decl_spec_seq_has_spec_p (declspecs, ds_concept);
12828 : 880226594 : if (concept_p)
12829 : 114 : constexpr_p = true;
12830 : :
12831 : 880226594 : if (decl_context == FUNCDEF)
12832 : : funcdef_flag = true, decl_context = NORMAL;
12833 : : else if (decl_context == MEMFUNCDEF)
12834 : : funcdef_flag = true, decl_context = FIELD;
12835 : : else if (decl_context == BITFIELD)
12836 : : bitfield = 1, decl_context = FIELD;
12837 : : else if (decl_context == TEMPLATE_TYPE_ARG)
12838 : : template_type_arg = true, decl_context = TYPENAME;
12839 : : else if (decl_context == TPARM)
12840 : 11554327 : template_parm_flag = true, decl_context = PARM;
12841 : :
12842 : 880226594 : if (initialized == SD_DEFAULTED || initialized == SD_DELETED)
12843 : 8940455 : funcdef_flag = true;
12844 : :
12845 : 880226594 : location_t typespec_loc = loc_or_input_loc (smallest_type_location
12846 : : (type_quals,
12847 : 880226594 : declspecs->locations));
12848 : 880226594 : location_t id_loc;
12849 : 880226594 : location_t init_loc;
12850 : 880226594 : if (declarator)
12851 : : {
12852 : 545180382 : id_loc = loc_or_input_loc (declarator->id_loc);
12853 : 545180382 : init_loc = loc_or_input_loc (declarator->init_loc);
12854 : : }
12855 : : else
12856 : 335046212 : init_loc = id_loc = input_location;
12857 : :
12858 : : /* Look inside a declarator for the name being declared
12859 : : and get it as a string, for an error message. */
12860 : 880226594 : for (id_declarator = declarator;
12861 : 1224219073 : id_declarator;
12862 : 343992479 : id_declarator = id_declarator->declarator)
12863 : : {
12864 : 854207144 : if (id_declarator->kind != cdk_id)
12865 : 343992504 : innermost_code = id_declarator->kind;
12866 : :
12867 : 854207144 : switch (id_declarator->kind)
12868 : : {
12869 : 167996905 : case cdk_function:
12870 : 167996905 : if (id_declarator->declarator
12871 : 167540818 : && id_declarator->declarator->kind == cdk_id)
12872 : : {
12873 : 165670017 : sfk = id_declarator->declarator->u.id.sfk;
12874 : 165670017 : if (sfk == sfk_destructor)
12875 : 3037024 : flags = DTOR_FLAG;
12876 : : }
12877 : : break;
12878 : :
12879 : 510214640 : case cdk_id:
12880 : 510214640 : {
12881 : 510214640 : tree qualifying_scope = id_declarator->u.id.qualifying_scope;
12882 : 510214640 : tree decl = id_declarator->u.id.unqualified_name;
12883 : 510214640 : if (!decl)
12884 : : break;
12885 : 510214640 : if (qualifying_scope)
12886 : : {
12887 : 9359010 : if (check_for_bare_parameter_packs (qualifying_scope,
12888 : 9359010 : id_declarator->id_loc))
12889 : 6 : return error_mark_node;
12890 : 9359004 : if (at_function_scope_p ())
12891 : : {
12892 : : /* [dcl.meaning]
12893 : :
12894 : : A declarator-id shall not be qualified except
12895 : : for ...
12896 : :
12897 : : None of the cases are permitted in block
12898 : : scope. */
12899 : 0 : if (qualifying_scope == global_namespace)
12900 : 0 : error ("invalid use of qualified-name %<::%D%>",
12901 : : decl);
12902 : 0 : else if (TYPE_P (qualifying_scope))
12903 : 0 : error ("invalid use of qualified-name %<%T::%D%>",
12904 : : qualifying_scope, decl);
12905 : : else
12906 : 0 : error ("invalid use of qualified-name %<%D::%D%>",
12907 : : qualifying_scope, decl);
12908 : 0 : return error_mark_node;
12909 : : }
12910 : 9359004 : else if (TYPE_P (qualifying_scope))
12911 : : {
12912 : 9261642 : ctype = qualifying_scope;
12913 : 9261642 : if (!MAYBE_CLASS_TYPE_P (ctype))
12914 : : {
12915 : 6 : error_at (id_declarator->id_loc,
12916 : : "%q#T is not a class or namespace", ctype);
12917 : 6 : ctype = NULL_TREE;
12918 : : }
12919 : 9261636 : else if (innermost_code != cdk_function
12920 : 371718 : && current_class_type
12921 : 9261651 : && !uniquely_derived_from_p (ctype,
12922 : : current_class_type))
12923 : : {
12924 : 9 : error_at (id_declarator->id_loc,
12925 : : "invalid use of qualified-name %<%T::%D%>",
12926 : : qualifying_scope, decl);
12927 : 9 : return error_mark_node;
12928 : : }
12929 : : }
12930 : 97362 : else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
12931 : 510214625 : in_namespace = qualifying_scope;
12932 : : }
12933 : 510214625 : switch (TREE_CODE (decl))
12934 : : {
12935 : 3037039 : case BIT_NOT_EXPR:
12936 : 3037039 : {
12937 : 3037039 : if (innermost_code != cdk_function)
12938 : : {
12939 : 6 : error_at (EXPR_LOCATION (decl),
12940 : : "declaration of %qE as non-function", decl);
12941 : 6 : return error_mark_node;
12942 : : }
12943 : 3037033 : else if (!qualifying_scope
12944 : 3037033 : && !(current_class_type && at_class_scope_p ()))
12945 : : {
12946 : 9 : error_at (EXPR_LOCATION (decl),
12947 : : "declaration of %qE as non-member", decl);
12948 : 9 : return error_mark_node;
12949 : : }
12950 : :
12951 : 3037024 : tree type = TREE_OPERAND (decl, 0);
12952 : 3037024 : if (TYPE_P (type))
12953 : 3037021 : type = constructor_name (type);
12954 : 3037024 : name = identifier_to_locale (IDENTIFIER_POINTER (type));
12955 : 3037024 : dname = decl;
12956 : : }
12957 : 3037024 : break;
12958 : :
12959 : 1817153 : case TEMPLATE_ID_EXPR:
12960 : 1817153 : {
12961 : 1817153 : tree fns = TREE_OPERAND (decl, 0);
12962 : :
12963 : 1817153 : dname = fns;
12964 : 2670067 : if (!identifier_p (dname))
12965 : 1817138 : dname = OVL_NAME (dname);
12966 : : }
12967 : : /* Fall through. */
12968 : :
12969 : 507177586 : case IDENTIFIER_NODE:
12970 : 507177586 : if (identifier_p (decl))
12971 : 505360433 : dname = decl;
12972 : :
12973 : 507177586 : if (IDENTIFIER_KEYWORD_P (dname))
12974 : : {
12975 : 0 : error ("declarator-id missing; using reserved word %qD",
12976 : : dname);
12977 : 0 : name = identifier_to_locale (IDENTIFIER_POINTER (dname));
12978 : : }
12979 : 507177586 : else if (!IDENTIFIER_CONV_OP_P (dname))
12980 : 506578721 : name = identifier_to_locale (IDENTIFIER_POINTER (dname));
12981 : : else
12982 : : {
12983 : 598865 : gcc_assert (flags == NO_SPECIAL);
12984 : 598865 : flags = TYPENAME_FLAG;
12985 : 598865 : sfk = sfk_conversion;
12986 : 598865 : tree glob = get_global_binding (dname);
12987 : 598865 : if (glob && TREE_CODE (glob) == TYPE_DECL)
12988 : 0 : name = identifier_to_locale (IDENTIFIER_POINTER (dname));
12989 : : else
12990 : : name = "<invalid operator>";
12991 : : }
12992 : : break;
12993 : :
12994 : 0 : default:
12995 : 0 : gcc_unreachable ();
12996 : : }
12997 : : break;
12998 : : }
12999 : :
13000 : : case cdk_array:
13001 : : case cdk_pointer:
13002 : : case cdk_reference:
13003 : : case cdk_ptrmem:
13004 : : break;
13005 : :
13006 : : case cdk_decomp:
13007 : 854207089 : name = "structured binding";
13008 : : break;
13009 : :
13010 : 25 : case cdk_error:
13011 : 25 : return error_mark_node;
13012 : :
13013 : 0 : default:
13014 : 0 : gcc_unreachable ();
13015 : : }
13016 : 854207089 : if (id_declarator->kind == cdk_id)
13017 : : break;
13018 : : }
13019 : :
13020 : : /* [dcl.fct.edf]
13021 : :
13022 : : The declarator in a function-definition shall have the form
13023 : : D1 ( parameter-declaration-clause) ... */
13024 : 880226539 : if (funcdef_flag && innermost_code != cdk_function)
13025 : : {
13026 : 3 : error_at (id_loc, "function definition does not declare parameters");
13027 : 3 : return error_mark_node;
13028 : : }
13029 : :
13030 : 880226536 : if (flags == TYPENAME_FLAG
13031 : 880226536 : && innermost_code != cdk_function
13032 : 3 : && ! (ctype && !declspecs->any_specifiers_p))
13033 : : {
13034 : 3 : error_at (id_loc, "declaration of %qD as non-function", dname);
13035 : 3 : return error_mark_node;
13036 : : }
13037 : :
13038 : 880226533 : if (dname && identifier_p (dname))
13039 : : {
13040 : 507177580 : if (UDLIT_OPER_P (dname)
13041 : 507177580 : && innermost_code != cdk_function)
13042 : : {
13043 : 6 : error_at (id_loc, "declaration of %qD as non-function", dname);
13044 : 6 : return error_mark_node;
13045 : : }
13046 : :
13047 : 507177574 : if (IDENTIFIER_ANY_OP_P (dname))
13048 : : {
13049 : 30230402 : if (typedef_p)
13050 : : {
13051 : 3 : error_at (id_loc, "declaration of %qD as %<typedef%>", dname);
13052 : 3 : return error_mark_node;
13053 : : }
13054 : 30230399 : else if (decl_context == PARM || decl_context == CATCHPARM)
13055 : : {
13056 : 15 : error_at (id_loc, "declaration of %qD as parameter", dname);
13057 : 15 : return error_mark_node;
13058 : : }
13059 : : }
13060 : : }
13061 : :
13062 : : /* Anything declared one level down from the top level
13063 : : must be one of the parameters of a function
13064 : : (because the body is at least two levels down). */
13065 : :
13066 : : /* This heuristic cannot be applied to C++ nodes! Fixed, however,
13067 : : by not allowing C++ class definitions to specify their parameters
13068 : : with xdecls (must be spec.d in the parmlist).
13069 : :
13070 : : Since we now wait to push a class scope until we are sure that
13071 : : we are in a legitimate method context, we must set oldcname
13072 : : explicitly (since current_class_name is not yet alive).
13073 : :
13074 : : We also want to avoid calling this a PARM if it is in a namespace. */
13075 : :
13076 : 880226509 : if (decl_context == NORMAL && !toplevel_bindings_p ())
13077 : : {
13078 : 59756175 : cp_binding_level *b = current_binding_level;
13079 : 59756175 : current_binding_level = b->level_chain;
13080 : 59756175 : if (current_binding_level != 0 && toplevel_bindings_p ())
13081 : : decl_context = PARM;
13082 : 59756175 : current_binding_level = b;
13083 : : }
13084 : :
13085 : 880226509 : if (name == NULL)
13086 : 369936981 : name = decl_context == PARM ? "parameter" : "type name";
13087 : :
13088 : 880226509 : if (consteval_p && constexpr_p)
13089 : : {
13090 : 6 : error_at (declspecs->locations[ds_consteval],
13091 : : "both %qs and %qs specified", "constexpr", "consteval");
13092 : 6 : return error_mark_node;
13093 : : }
13094 : :
13095 : 880226503 : if (concept_p && typedef_p)
13096 : : {
13097 : 9 : error_at (declspecs->locations[ds_concept],
13098 : : "%qs cannot appear in a typedef declaration", "concept");
13099 : 9 : return error_mark_node;
13100 : : }
13101 : :
13102 : 880226494 : if (constexpr_p && typedef_p)
13103 : : {
13104 : 3 : error_at (declspecs->locations[ds_constexpr],
13105 : : "%qs cannot appear in a typedef declaration", "constexpr");
13106 : 3 : return error_mark_node;
13107 : : }
13108 : :
13109 : 880226491 : if (consteval_p && typedef_p)
13110 : : {
13111 : 3 : error_at (declspecs->locations[ds_consteval],
13112 : : "%qs cannot appear in a typedef declaration", "consteval");
13113 : 3 : return error_mark_node;
13114 : : }
13115 : :
13116 : 880226488 : if (constinit_p && typedef_p)
13117 : : {
13118 : 3 : error_at (declspecs->locations[ds_constinit],
13119 : : "%qs cannot appear in a typedef declaration", "constinit");
13120 : 3 : return error_mark_node;
13121 : : }
13122 : :
13123 : : /* [dcl.spec]/2 "At most one of the constexpr, consteval, and constinit
13124 : : keywords shall appear in a decl-specifier-seq." */
13125 : 880226485 : if (constinit_p && constexpr_p)
13126 : : {
13127 : 6 : gcc_rich_location richloc (declspecs->locations[ds_constinit]);
13128 : 6 : richloc.add_range (declspecs->locations[ds_constexpr]);
13129 : 6 : error_at (&richloc,
13130 : : "can use at most one of the %<constinit%> and %<constexpr%> "
13131 : : "specifiers");
13132 : 6 : return error_mark_node;
13133 : 6 : }
13134 : :
13135 : : /* If there were multiple types specified in the decl-specifier-seq,
13136 : : issue an error message. */
13137 : 880226479 : if (declspecs->multiple_types_p)
13138 : : {
13139 : 1500 : error_at (typespec_loc,
13140 : : "two or more data types in declaration of %qs", name);
13141 : 1500 : return error_mark_node;
13142 : : }
13143 : :
13144 : 880224979 : if (declspecs->conflicting_specifiers_p)
13145 : 31 : return error_mark_node;
13146 : :
13147 : : /* Extract the basic type from the decl-specifier-seq. */
13148 : 880224948 : type = declspecs->type;
13149 : 880224948 : if (type == error_mark_node)
13150 : : {
13151 : 1164 : type = NULL_TREE;
13152 : 1164 : type_was_error_mark_node = true;
13153 : : }
13154 : :
13155 : : /* Ignore erroneous attributes. */
13156 : 880224948 : if (attrlist && *attrlist == error_mark_node)
13157 : 12 : *attrlist = NULL_TREE;
13158 : :
13159 : : /* An object declared as __attribute__((unavailable)) suppresses
13160 : : any reports of being declared with unavailable or deprecated
13161 : : items. An object declared as __attribute__((deprecated))
13162 : : suppresses warnings of uses of other deprecated items. */
13163 : 880224948 : auto ds = make_temp_override (deprecated_state);
13164 : 880224948 : if (attrlist && lookup_attribute ("unavailable", *attrlist))
13165 : 159 : deprecated_state = UNAVAILABLE_DEPRECATED_SUPPRESS;
13166 : 880224789 : else if (attrlist && lookup_attribute ("deprecated", *attrlist))
13167 : 671441 : deprecated_state = DEPRECATED_SUPPRESS;
13168 : :
13169 : 880224948 : cp_handle_deprecated_or_unavailable (type);
13170 : 880224948 : if (type && TREE_CODE (type) == TYPE_DECL)
13171 : : {
13172 : 605663269 : cp_warn_deprecated_use_scopes (CP_DECL_CONTEXT (type));
13173 : 605663269 : typedef_decl = type;
13174 : 605663269 : type = TREE_TYPE (typedef_decl);
13175 : 605663269 : if (DECL_ARTIFICIAL (typedef_decl))
13176 : 437653478 : cp_handle_deprecated_or_unavailable (type);
13177 : : }
13178 : : /* No type at all: default to `int', and set DEFAULTED_INT
13179 : : because it was not a user-defined typedef. */
13180 : 880224948 : if (type == NULL_TREE)
13181 : : {
13182 : 33928399 : if (signed_p || unsigned_p || long_p || short_p)
13183 : : {
13184 : : /* These imply 'int'. */
13185 : 7871570 : type = integer_type_node;
13186 : 7871570 : defaulted_int = 1;
13187 : : }
13188 : : /* If we just have "complex", it is equivalent to "complex double". */
13189 : 26056829 : else if (!longlong && !explicit_intN
13190 : 26056829 : && decl_spec_seq_has_spec_p (declspecs, ds_complex))
13191 : : {
13192 : 81 : type = double_type_node;
13193 : 81 : pedwarn (declspecs->locations[ds_complex], OPT_Wpedantic,
13194 : : "ISO C++ does not support plain %<complex%> meaning "
13195 : : "%<double complex%>");
13196 : : }
13197 : : }
13198 : : /* Gather flags. */
13199 : 880224948 : explicit_int = declspecs->explicit_int_p;
13200 : 880224948 : explicit_char = declspecs->explicit_char_p;
13201 : :
13202 : : #if 0
13203 : : /* See the code below that used this. */
13204 : : if (typedef_decl)
13205 : : decl_attr = DECL_ATTRIBUTES (typedef_decl);
13206 : : #endif
13207 : 880224948 : typedef_type = type;
13208 : :
13209 : 880224948 : if (sfk == sfk_conversion || sfk == sfk_deduction_guide)
13210 : 1600570 : ctor_return_type = TREE_TYPE (dname);
13211 : : else
13212 : : ctor_return_type = ctype;
13213 : :
13214 : 880224948 : if (sfk != sfk_none)
13215 : : {
13216 : 26055264 : type = check_special_function_return_type (sfk, type,
13217 : : ctor_return_type,
13218 : : type_quals,
13219 : : &declarator,
13220 : : declspecs->locations);
13221 : 26055264 : type_quals = TYPE_UNQUALIFIED;
13222 : : }
13223 : 854169684 : else if (type == NULL_TREE)
13224 : : {
13225 : 1565 : int is_main;
13226 : :
13227 : 1565 : explicit_int = -1;
13228 : :
13229 : : /* We handle `main' specially here, because 'main () { }' is so
13230 : : common. With no options, it is allowed. With -Wreturn-type,
13231 : : it is a warning. It is only an error with -pedantic-errors. */
13232 : 3130 : is_main = (funcdef_flag
13233 : 3365 : && dname && identifier_p (dname)
13234 : 235 : && MAIN_NAME_P (dname)
13235 : 68 : && ctype == NULL_TREE
13236 : 68 : && in_namespace == NULL_TREE
13237 : 1633 : && current_namespace == global_namespace);
13238 : :
13239 : 1565 : if (type_was_error_mark_node)
13240 : : /* We've already issued an error, don't complain more. */;
13241 : 401 : else if (in_system_header_at (id_loc) || flag_ms_extensions)
13242 : : /* Allow it, sigh. */;
13243 : 339 : else if (! is_main)
13244 : 277 : permerror (id_loc, "ISO C++ forbids declaration of %qs with no type",
13245 : : name);
13246 : 62 : else if (pedantic)
13247 : 4 : pedwarn (id_loc, OPT_Wpedantic,
13248 : : "ISO C++ forbids declaration of %qs with no type", name);
13249 : : else
13250 : 58 : warning_at (id_loc, OPT_Wreturn_type,
13251 : : "ISO C++ forbids declaration of %qs with no type", name);
13252 : :
13253 : 1565 : if (type_was_error_mark_node && template_parm_flag)
13254 : : /* FIXME we should be able to propagate the error_mark_node as is
13255 : : for other contexts too. */
13256 : 151 : type = error_mark_node;
13257 : : else
13258 : 1414 : type = integer_type_node;
13259 : : }
13260 : :
13261 : 880224948 : ctype = NULL_TREE;
13262 : :
13263 : 880224948 : if (explicit_intN)
13264 : : {
13265 : 879687 : if (! int_n_enabled_p[declspecs->int_n_idx])
13266 : : {
13267 : 0 : error_at (declspecs->locations[ds_type_spec],
13268 : : "%<__int%d%> is not supported by this target",
13269 : 0 : int_n_data[declspecs->int_n_idx].bitsize);
13270 : 0 : explicit_intN = false;
13271 : : }
13272 : : /* Don't pedwarn if the alternate "__intN__" form has been used instead
13273 : : of "__intN". */
13274 : 879687 : else if (!int_n_alt && pedantic)
13275 : 5187 : pedwarn (declspecs->locations[ds_type_spec], OPT_Wpedantic,
13276 : : "ISO C++ does not support %<__int%d%> for %qs",
13277 : 5187 : int_n_data[declspecs->int_n_idx].bitsize, name);
13278 : : }
13279 : :
13280 : : /* Now process the modifiers that were specified
13281 : : and check for invalid combinations. */
13282 : :
13283 : : /* Long double is a special combination. */
13284 : 880224948 : if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
13285 : : {
13286 : 8487779 : long_p = false;
13287 : 8487779 : type = cp_build_qualified_type (long_double_type_node,
13288 : : cp_type_quals (type));
13289 : : }
13290 : :
13291 : : /* Check all other uses of type modifiers. */
13292 : :
13293 : 880224948 : if (unsigned_p || signed_p || long_p || short_p)
13294 : : {
13295 : 18384238 : location_t loc;
13296 : 18384238 : const char *key;
13297 : 18384238 : if (unsigned_p)
13298 : : {
13299 : 12362297 : key = "unsigned";
13300 : 12362297 : loc = declspecs->locations[ds_unsigned];
13301 : : }
13302 : 6021941 : else if (signed_p)
13303 : : {
13304 : 1039329 : key = "signed";
13305 : 1039329 : loc = declspecs->locations[ds_signed];
13306 : : }
13307 : 4982612 : else if (longlong)
13308 : : {
13309 : 1607091 : key = "long long";
13310 : 1607091 : loc = declspecs->locations[ds_long_long];
13311 : : }
13312 : 3375521 : else if (long_p)
13313 : : {
13314 : 2887897 : key = "long";
13315 : 2887897 : loc = declspecs->locations[ds_long];
13316 : : }
13317 : : else /* if (short_p) */
13318 : : {
13319 : 487624 : key = "short";
13320 : 487624 : loc = declspecs->locations[ds_short];
13321 : : }
13322 : :
13323 : 18384238 : int ok = 0;
13324 : :
13325 : 18384238 : if (signed_p && unsigned_p)
13326 : 54 : complain_about_incompatible_declspecs
13327 : 54 : ("signed", declspecs->locations[ds_signed],
13328 : : "unsigned", declspecs->locations[ds_unsigned]);
13329 : 18384184 : else if (long_p && short_p)
13330 : 12 : complain_about_incompatible_declspecs
13331 : 12 : ("long", declspecs->locations[ds_long],
13332 : : "short", declspecs->locations[ds_short]);
13333 : 18384172 : else if (TREE_CODE (type) != INTEGER_TYPE
13334 : 18384159 : || type == char8_type_node
13335 : 18384135 : || type == char16_type_node
13336 : 18384111 : || type == char32_type_node
13337 : 18384087 : || ((long_p || short_p)
13338 : 9808516 : && (explicit_char || explicit_intN)))
13339 : 418 : error_at (loc, "%qs specified with %qT", key, type);
13340 : 18383754 : else if (!explicit_int && !defaulted_int
13341 : 18383754 : && !explicit_char && !explicit_intN)
13342 : : {
13343 : 30 : if (typedef_decl)
13344 : : {
13345 : 27 : pedwarn (loc, OPT_Wpedantic,
13346 : : "%qs specified with typedef-name %qD",
13347 : : key, typedef_decl);
13348 : 27 : ok = !flag_pedantic_errors;
13349 : : /* PR108099: __int128_t comes from c_common_nodes_and_builtins,
13350 : : and is not built as a typedef. */
13351 : 27 : if (is_typedef_decl (typedef_decl))
13352 : 18 : type = DECL_ORIGINAL_TYPE (typedef_decl);
13353 : : }
13354 : 3 : else if (declspecs->decltype_p)
13355 : 0 : error_at (loc, "%qs specified with %<decltype%>", key);
13356 : : else
13357 : 3 : error_at (loc, "%qs specified with %<typeof%>", key);
13358 : : }
13359 : : else
13360 : : ok = 1;
13361 : :
13362 : : /* Discard the type modifiers if they are invalid. */
13363 : 514 : if (! ok)
13364 : : {
13365 : : unsigned_p = false;
13366 : : signed_p = false;
13367 : : long_p = false;
13368 : : short_p = false;
13369 : : longlong = 0;
13370 : : }
13371 : : }
13372 : :
13373 : : /* Decide whether an integer type is signed or not.
13374 : : Optionally treat bitfields as signed by default. */
13375 : 880224458 : if (unsigned_p
13376 : : /* [class.bit]
13377 : :
13378 : : It is implementation-defined whether a plain (neither
13379 : : explicitly signed or unsigned) char, short, int, or long
13380 : : bit-field is signed or unsigned.
13381 : :
13382 : : Naturally, we extend this to long long as well. Note that
13383 : : this does not include wchar_t. */
13384 : 880224948 : || (bitfield && !flag_signed_bitfields
13385 : 18 : && !signed_p
13386 : : /* A typedef for plain `int' without `signed' can be
13387 : : controlled just like plain `int', but a typedef for
13388 : : `signed int' cannot be so controlled. */
13389 : 18 : && !(typedef_decl
13390 : 18 : && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
13391 : 13 : && TREE_CODE (type) == INTEGER_TYPE
13392 : 10 : && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
13393 : : {
13394 : 12362082 : if (explicit_intN)
13395 : 412470 : type = int_n_trees[declspecs->int_n_idx].unsigned_type;
13396 : 11949612 : else if (longlong)
13397 : 1289768 : type = long_long_unsigned_type_node;
13398 : 10659844 : else if (long_p)
13399 : 2079825 : type = long_unsigned_type_node;
13400 : 8580019 : else if (short_p)
13401 : 1214297 : type = short_unsigned_type_node;
13402 : 7365722 : else if (type == char_type_node)
13403 : 1463617 : type = unsigned_char_type_node;
13404 : 5902105 : else if (typedef_decl)
13405 : 25 : type = c_common_unsigned_type (type);
13406 : : else
13407 : 5902080 : type = unsigned_type_node;
13408 : : }
13409 : 867862866 : else if (signed_p && type == char_type_node)
13410 : 640862 : type = signed_char_type_node;
13411 : 867222004 : else if (explicit_intN)
13412 : 467217 : type = int_n_trees[declspecs->int_n_idx].signed_type;
13413 : 866754787 : else if (longlong)
13414 : 1681967 : type = long_long_integer_type_node;
13415 : 865072820 : else if (long_p)
13416 : 2966082 : type = long_integer_type_node;
13417 : 862106738 : else if (short_p)
13418 : 576244 : type = short_integer_type_node;
13419 : 861530494 : else if (signed_p && typedef_decl)
13420 : 9 : type = c_common_signed_type (type);
13421 : :
13422 : 880224948 : if (decl_spec_seq_has_spec_p (declspecs, ds_complex))
13423 : : {
13424 : 1359364 : if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
13425 : 3 : error_at (declspecs->locations[ds_complex],
13426 : : "complex invalid for %qs", name);
13427 : : /* If a modifier is specified, the resulting complex is the complex
13428 : : form of TYPE. E.g, "complex short" is "complex short int". */
13429 : 1359361 : else if (type == integer_type_node)
13430 : 164 : type = complex_integer_type_node;
13431 : 1359197 : else if (type == float_type_node)
13432 : 351327 : type = complex_float_type_node;
13433 : 1007870 : else if (type == double_type_node)
13434 : 351848 : type = complex_double_type_node;
13435 : 656022 : else if (type == long_double_type_node)
13436 : 351368 : type = complex_long_double_type_node;
13437 : : else
13438 : 304654 : type = build_complex_type (type);
13439 : : }
13440 : :
13441 : : /* If we're using the injected-class-name to form a compound type or a
13442 : : declaration, replace it with the underlying class so we don't get
13443 : : redundant typedefs in the debug output. But if we are returning the
13444 : : type unchanged, leave it alone so that it's available to
13445 : : maybe_get_template_decl_from_type_decl. */
13446 : 175798065 : if (CLASS_TYPE_P (type)
13447 : 175750028 : && DECL_SELF_REFERENCE_P (TYPE_NAME (type))
13448 : 27812556 : && type == TREE_TYPE (TYPE_NAME (type))
13449 : 908037504 : && (declarator || type_quals))
13450 : 26763181 : type = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
13451 : :
13452 : 880224948 : type_quals |= cp_type_quals (type);
13453 : 1760449896 : type = cp_build_qualified_type
13454 : 1760449896 : (type, type_quals, ((((typedef_decl && !DECL_ARTIFICIAL (typedef_decl))
13455 : 712215157 : || declspecs->decltype_p)
13456 : : ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
13457 : : /* We might have ignored or rejected some of the qualifiers. */
13458 : 880224948 : type_quals = cp_type_quals (type);
13459 : :
13460 : 865938531 : if (cxx_dialect >= cxx17 && type && is_auto (type)
13461 : 12190792 : && innermost_code != cdk_function
13462 : : /* Placeholder in parm gets a better error below. */
13463 : 7429349 : && !(decl_context == PARM || decl_context == CATCHPARM)
13464 : 887648682 : && id_declarator && declarator != id_declarator)
13465 : 935205 : if (tree tmpl = CLASS_PLACEHOLDER_TEMPLATE (type))
13466 : : {
13467 : 16 : auto_diagnostic_group g;
13468 : 16 : gcc_rich_location richloc (typespec_loc);
13469 : 16 : richloc.add_fixit_insert_after ("<>");
13470 : 16 : error_at (&richloc, "missing template argument list after %qE; "
13471 : : "for deduction, template placeholder must be followed "
13472 : : "by a simple declarator-id", tmpl);
13473 : 16 : inform (DECL_SOURCE_LOCATION (tmpl), "%qD declared here", tmpl);
13474 : 16 : type = error_mark_node;
13475 : 16 : }
13476 : :
13477 : 880224948 : staticp = 0;
13478 : 880224948 : inlinep = decl_spec_seq_has_spec_p (declspecs, ds_inline);
13479 : 880224948 : virtualp = decl_spec_seq_has_spec_p (declspecs, ds_virtual);
13480 : 880224948 : explicitp = decl_spec_seq_has_spec_p (declspecs, ds_explicit);
13481 : :
13482 : 880224948 : storage_class = declspecs->storage_class;
13483 : 880224948 : if (storage_class == sc_static)
13484 : 18122430 : staticp = 1 + (decl_context == FIELD);
13485 : 862102518 : else if (decl_context == FIELD && sfk == sfk_deduction_guide)
13486 : : /* Treat class-scope deduction guides as static member functions
13487 : : so that they get a FUNCTION_TYPE instead of a METHOD_TYPE. */
13488 : 17803118 : staticp = 2;
13489 : :
13490 : 880224948 : if (virtualp)
13491 : : {
13492 : 3927846 : if (staticp == 2)
13493 : : {
13494 : 21 : gcc_rich_location richloc (declspecs->locations[ds_virtual]);
13495 : 21 : richloc.add_range (declspecs->locations[ds_storage_class]);
13496 : 21 : error_at (&richloc, "member %qD cannot be declared both %<virtual%> "
13497 : : "and %<static%>", dname);
13498 : 21 : storage_class = sc_none;
13499 : 21 : staticp = 0;
13500 : 21 : }
13501 : 3927846 : if (constexpr_p && pedantic && cxx_dialect < cxx20)
13502 : : {
13503 : 6 : gcc_rich_location richloc (declspecs->locations[ds_virtual]);
13504 : 6 : richloc.add_range (declspecs->locations[ds_constexpr]);
13505 : 6 : pedwarn (&richloc, OPT_Wc__20_extensions, "member %qD can be "
13506 : : "declared both %<virtual%> and %<constexpr%> only in "
13507 : : "%<-std=c++20%> or %<-std=gnu++20%>", dname);
13508 : 6 : }
13509 : : }
13510 : 880224948 : friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
13511 : :
13512 : : /* Issue errors about use of storage classes for parameters. */
13513 : 880224948 : if (decl_context == PARM)
13514 : : {
13515 : 264926184 : if (typedef_p)
13516 : : {
13517 : 24 : error_at (declspecs->locations[ds_typedef],
13518 : : "typedef declaration invalid in parameter declaration");
13519 : 24 : return error_mark_node;
13520 : : }
13521 : 264926160 : else if (template_parm_flag && storage_class != sc_none)
13522 : : {
13523 : 16 : error_at (min_location (declspecs->locations[ds_thread],
13524 : : declspecs->locations[ds_storage_class]),
13525 : : "storage class specified for template parameter %qs",
13526 : : name);
13527 : 16 : return error_mark_node;
13528 : : }
13529 : 264926144 : else if (storage_class == sc_static
13530 : 264926144 : || storage_class == sc_extern
13531 : 264926141 : || thread_p)
13532 : : {
13533 : 9 : error_at (min_location (declspecs->locations[ds_thread],
13534 : : declspecs->locations[ds_storage_class]),
13535 : : "storage class specified for parameter %qs", name);
13536 : 9 : return error_mark_node;
13537 : : }
13538 : :
13539 : : /* Function parameters cannot be concept. */
13540 : 264926135 : if (concept_p)
13541 : : {
13542 : 9 : error_at (declspecs->locations[ds_concept],
13543 : : "a parameter cannot be declared %qs", "concept");
13544 : 9 : concept_p = 0;
13545 : 9 : constexpr_p = 0;
13546 : : }
13547 : : /* Function parameters cannot be constexpr. If we saw one, moan
13548 : : and pretend it wasn't there. */
13549 : 264926126 : else if (constexpr_p)
13550 : : {
13551 : 9 : error_at (declspecs->locations[ds_constexpr],
13552 : : "a parameter cannot be declared %qs", "constexpr");
13553 : 9 : constexpr_p = 0;
13554 : : }
13555 : 264926135 : if (constinit_p)
13556 : : {
13557 : 6 : error_at (declspecs->locations[ds_constinit],
13558 : : "a parameter cannot be declared %qs", "constinit");
13559 : 6 : constinit_p = 0;
13560 : : }
13561 : 264926135 : if (consteval_p)
13562 : : {
13563 : 3 : error_at (declspecs->locations[ds_consteval],
13564 : : "a parameter cannot be declared %qs", "consteval");
13565 : 3 : consteval_p = 0;
13566 : : }
13567 : : }
13568 : :
13569 : : /* Give error if `virtual' is used outside of class declaration. */
13570 : 880224899 : if (virtualp
13571 : 3927846 : && (current_class_name == NULL_TREE || decl_context != FIELD))
13572 : : {
13573 : 22 : error_at (declspecs->locations[ds_virtual],
13574 : : "%<virtual%> outside class declaration");
13575 : 22 : virtualp = 0;
13576 : : }
13577 : :
13578 : 880224899 : if (innermost_code == cdk_decomp)
13579 : : {
13580 : 149896 : location_t loc = (declarator->kind == cdk_reference
13581 : 74948 : ? declarator->declarator->id_loc : declarator->id_loc);
13582 : 74948 : if (inlinep)
13583 : 1 : error_at (declspecs->locations[ds_inline],
13584 : : "structured binding declaration cannot be %qs", "inline");
13585 : 74948 : if (typedef_p)
13586 : 1 : error_at (declspecs->locations[ds_typedef],
13587 : : "structured binding declaration cannot be %qs", "typedef");
13588 : 74948 : if (constexpr_p && !concept_p)
13589 : 4 : error_at (declspecs->locations[ds_constexpr], "structured "
13590 : : "binding declaration cannot be %qs", "constexpr");
13591 : 74948 : if (consteval_p)
13592 : 3 : error_at (declspecs->locations[ds_consteval], "structured "
13593 : : "binding declaration cannot be %qs", "consteval");
13594 : 74948 : if (thread_p && cxx_dialect < cxx20)
13595 : 29 : pedwarn (declspecs->locations[ds_thread], OPT_Wc__20_extensions,
13596 : : "structured binding declaration can be %qs only in "
13597 : : "%<-std=c++20%> or %<-std=gnu++20%>",
13598 : 29 : declspecs->gnu_thread_keyword_p
13599 : : ? "__thread" : "thread_local");
13600 : 74948 : if (concept_p)
13601 : 0 : error_at (declspecs->locations[ds_concept],
13602 : : "structured binding declaration cannot be %qs", "concept");
13603 : : /* [dcl.struct.bind] "A cv that includes volatile is deprecated." */
13604 : 74948 : if (type_quals & TYPE_QUAL_VOLATILE)
13605 : 26 : warning_at (declspecs->locations[ds_volatile], OPT_Wvolatile,
13606 : : "%<volatile%>-qualified structured binding is deprecated");
13607 : 74948 : switch (storage_class)
13608 : : {
13609 : : case sc_none:
13610 : : break;
13611 : 0 : case sc_register:
13612 : 0 : error_at (loc, "structured binding declaration cannot be %qs",
13613 : : "register");
13614 : 0 : break;
13615 : 134 : case sc_static:
13616 : 134 : if (cxx_dialect < cxx20)
13617 : 126 : pedwarn (loc, OPT_Wc__20_extensions,
13618 : : "structured binding declaration can be %qs only in "
13619 : : "%<-std=c++20%> or %<-std=gnu++20%>", "static");
13620 : : break;
13621 : 1 : case sc_extern:
13622 : 1 : error_at (loc, "structured binding declaration cannot be %qs",
13623 : : "extern");
13624 : 1 : break;
13625 : 0 : case sc_mutable:
13626 : 0 : error_at (loc, "structured binding declaration cannot be %qs",
13627 : : "mutable");
13628 : 0 : break;
13629 : 0 : case sc_auto:
13630 : 0 : error_at (loc, "structured binding declaration cannot be "
13631 : : "C++98 %<auto%>");
13632 : 0 : break;
13633 : 0 : default:
13634 : 0 : gcc_unreachable ();
13635 : : }
13636 : 74948 : if (TREE_CODE (type) != TEMPLATE_TYPE_PARM
13637 : 74948 : || TYPE_IDENTIFIER (type) != auto_identifier)
13638 : : {
13639 : 3 : if (type != error_mark_node)
13640 : : {
13641 : 3 : auto_diagnostic_group d;
13642 : 3 : error_at (loc, "structured binding declaration cannot have "
13643 : : "type %qT", type);
13644 : 3 : inform (loc,
13645 : : "type must be cv-qualified %<auto%> or reference to "
13646 : : "cv-qualified %<auto%>");
13647 : 3 : }
13648 : 3 : type = build_qualified_type (make_auto (), type_quals);
13649 : 3 : declspecs->type = type;
13650 : : }
13651 : 74945 : else if (PLACEHOLDER_TYPE_CONSTRAINTS_INFO (type))
13652 : 51 : pedwarn (loc, OPT_Wpedantic,
13653 : : "structured binding declaration cannot have constrained "
13654 : : "%<auto%> type %qT", type);
13655 : 74948 : inlinep = 0;
13656 : 74948 : typedef_p = 0;
13657 : 74948 : constexpr_p = 0;
13658 : 74948 : consteval_p = 0;
13659 : 74948 : concept_p = 0;
13660 : 74948 : if (storage_class != sc_static)
13661 : : {
13662 : 74814 : storage_class = sc_none;
13663 : 74814 : declspecs->storage_class = sc_none;
13664 : : }
13665 : : }
13666 : :
13667 : : /* Static anonymous unions are dealt with here. */
13668 : 880224899 : if (staticp && decl_context == TYPENAME
13669 : 0 : && declspecs->type
13670 : 880224899 : && ANON_AGGR_TYPE_P (declspecs->type))
13671 : : decl_context = FIELD;
13672 : :
13673 : : /* Warn about storage classes that are invalid for certain
13674 : : kinds of declarations (parameters, typenames, etc.). */
13675 : 880224899 : if (thread_p
13676 : 20471 : && ((storage_class
13677 : 20471 : && storage_class != sc_extern
13678 : 490 : && storage_class != sc_static)
13679 : 20460 : || typedef_p))
13680 : : {
13681 : 17 : location_t loc
13682 : 17 : = min_location (declspecs->locations[ds_thread],
13683 : : declspecs->locations[ds_storage_class]);
13684 : 17 : error_at (loc, "multiple storage classes in declaration of %qs", name);
13685 : 17 : thread_p = false;
13686 : : }
13687 : 880224899 : if (decl_context != NORMAL
13688 : 732066070 : && ((storage_class != sc_none
13689 : 732066070 : && storage_class != sc_mutable)
13690 : 714262964 : || thread_p))
13691 : : {
13692 : 17803109 : if ((decl_context == PARM || decl_context == CATCHPARM)
13693 : 36 : && (storage_class == sc_register
13694 : 36 : || storage_class == sc_auto))
13695 : : ;
13696 : 17803073 : else if (typedef_p)
13697 : : ;
13698 : 17803073 : else if (decl_context == FIELD
13699 : : /* C++ allows static class elements. */
13700 : 17803073 : && storage_class == sc_static)
13701 : : /* C++ also allows inlines and signed and unsigned elements,
13702 : : but in those cases we don't come in here. */
13703 : : ;
13704 : : else
13705 : : {
13706 : 15 : location_t loc
13707 : 15 : = min_location (declspecs->locations[ds_thread],
13708 : : declspecs->locations[ds_storage_class]);
13709 : 15 : if (decl_context == FIELD)
13710 : 15 : error_at (loc, "storage class specified for %qs", name);
13711 : 0 : else if (decl_context == PARM || decl_context == CATCHPARM)
13712 : 0 : error_at (loc, "storage class specified for parameter %qs", name);
13713 : : else
13714 : 0 : error_at (loc, "storage class specified for typename");
13715 : 15 : if (storage_class == sc_register
13716 : 15 : || storage_class == sc_auto
13717 : 15 : || storage_class == sc_extern
13718 : 3 : || thread_p)
13719 : 15 : storage_class = sc_none;
13720 : : }
13721 : : }
13722 : 862421790 : else if (storage_class == sc_extern && funcdef_flag
13723 : 862421790 : && ! toplevel_bindings_p ())
13724 : 0 : error ("nested function %qs declared %<extern%>", name);
13725 : 862421790 : else if (toplevel_bindings_p ())
13726 : : {
13727 : 398195628 : if (storage_class == sc_auto)
13728 : 2 : error_at (declspecs->locations[ds_storage_class],
13729 : : "top-level declaration of %qs specifies %<auto%>", name);
13730 : : }
13731 : 464226162 : else if (thread_p
13732 : 464226162 : && storage_class != sc_extern
13733 : 97 : && storage_class != sc_static)
13734 : : {
13735 : 65 : if (declspecs->gnu_thread_keyword_p)
13736 : 3 : pedwarn (declspecs->locations[ds_thread],
13737 : : 0, "function-scope %qs implicitly auto and "
13738 : : "declared %<__thread%>", name);
13739 : :
13740 : : /* When thread_local is applied to a variable of block scope the
13741 : : storage-class-specifier static is implied if it does not appear
13742 : : explicitly. */
13743 : 65 : storage_class = declspecs->storage_class = sc_static;
13744 : 65 : staticp = 1;
13745 : : }
13746 : :
13747 : 880224899 : if (storage_class && friendp)
13748 : : {
13749 : 12 : error_at (min_location (declspecs->locations[ds_thread],
13750 : : declspecs->locations[ds_storage_class]),
13751 : : "storage class specifiers invalid in friend function "
13752 : : "declarations");
13753 : 12 : storage_class = sc_none;
13754 : 12 : staticp = 0;
13755 : : }
13756 : :
13757 : 880224899 : if (!id_declarator)
13758 : : unqualified_id = NULL_TREE;
13759 : : else
13760 : : {
13761 : 510213049 : unqualified_id = id_declarator->u.id.unqualified_name;
13762 : 510213049 : switch (TREE_CODE (unqualified_id))
13763 : : {
13764 : 3037024 : case BIT_NOT_EXPR:
13765 : 3037024 : unqualified_id = TREE_OPERAND (unqualified_id, 0);
13766 : 3037024 : if (TYPE_P (unqualified_id))
13767 : 3037021 : unqualified_id = constructor_name (unqualified_id);
13768 : : break;
13769 : :
13770 : : case IDENTIFIER_NODE:
13771 : : case TEMPLATE_ID_EXPR:
13772 : : break;
13773 : :
13774 : 0 : default:
13775 : 0 : gcc_unreachable ();
13776 : : }
13777 : : }
13778 : :
13779 : 880224899 : if (declspecs->std_attributes
13780 : 880224899 : && !diagnose_misapplied_contracts (declspecs->std_attributes))
13781 : : {
13782 : 651 : location_t attr_loc = declspecs->locations[ds_std_attribute];
13783 : 651 : auto_diagnostic_group d;
13784 : 651 : if (any_nonignored_attribute_p (declspecs->std_attributes)
13785 : 651 : && warning_at (attr_loc, OPT_Wattributes, "attribute ignored"))
13786 : 648 : inform (attr_loc, "an attribute that appertains to a type-specifier "
13787 : : "is ignored");
13788 : 651 : }
13789 : :
13790 : 880224899 : if (attrlist)
13791 : 868446683 : diagnose_misapplied_contracts (*attrlist);
13792 : :
13793 : : /* Skip over build_memfn_type when a FUNCTION_DECL is an xobj memfn. */
13794 : : bool is_xobj_member_function = false;
13795 : : /* Determine the type of the entity declared by recurring on the
13796 : : declarator. */
13797 : 1224140423 : for (; declarator; declarator = declarator->declarator)
13798 : : {
13799 : 854203546 : const cp_declarator *inner_declarator;
13800 : 854203546 : tree attrs;
13801 : :
13802 : 854203546 : if (type == error_mark_node)
13803 : 599 : return error_mark_node;
13804 : :
13805 : 854203220 : attrs = declarator->attributes;
13806 : 854203220 : if (attrs)
13807 : : {
13808 : 12781 : int attr_flags;
13809 : :
13810 : 12781 : attr_flags = 0;
13811 : 12781 : if (declarator->kind == cdk_id)
13812 : 12106 : attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
13813 : 12781 : if (declarator->kind == cdk_function)
13814 : 655 : attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
13815 : 12781 : if (declarator->kind == cdk_array)
13816 : 2 : attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
13817 : 12781 : tree late_attrs = NULL_TREE;
13818 : 12781 : if (decl_context != PARM && decl_context != TYPENAME)
13819 : : /* Assume that any attributes that get applied late to
13820 : : templates will DTRT when applied to the declaration
13821 : : as a whole. */
13822 : 12769 : late_attrs = splice_template_attributes (&attrs, type);
13823 : 12781 : returned_attrs = decl_attributes (&type,
13824 : : attr_chainon (returned_attrs,
13825 : : attrs),
13826 : : attr_flags);
13827 : 12781 : returned_attrs = attr_chainon (late_attrs, returned_attrs);
13828 : : }
13829 : :
13830 : 854203220 : inner_declarator = declarator->declarator;
13831 : :
13832 : : /* Check that contracts aren't misapplied. */
13833 : 854203220 : if (tree contract_attr = find_contract (declarator->std_attributes))
13834 : 480 : if (declarator->kind != cdk_function
13835 : 475 : || innermost_code != cdk_function)
13836 : 7 : diagnose_misapplied_contracts (contract_attr);
13837 : :
13838 : : /* We don't want to warn in parameter context because we don't
13839 : : yet know if the parse will succeed, and this might turn out
13840 : : to be a constructor call. */
13841 : 854203220 : if (decl_context != PARM
13842 : 854203220 : && decl_context != TYPENAME
13843 : 489923426 : && !typedef_p
13844 : 446664115 : && declarator->parenthesized != UNKNOWN_LOCATION
13845 : : /* If the type is class-like and the inner name used a
13846 : : global namespace qualifier, we need the parens.
13847 : : Unfortunately all we can tell is whether a qualified name
13848 : : was used or not. */
13849 : 854203401 : && !(inner_declarator
13850 : 126 : && inner_declarator->kind == cdk_id
13851 : 108 : && inner_declarator->u.id.qualifying_scope
13852 : 18 : && (MAYBE_CLASS_TYPE_P (type)
13853 : 12 : || TREE_CODE (type) == ENUMERAL_TYPE)))
13854 : : {
13855 : 169 : auto_diagnostic_group d;
13856 : 169 : if (warning_at (declarator->parenthesized, OPT_Wparentheses,
13857 : : "unnecessary parentheses in declaration of %qs",
13858 : : name))
13859 : : {
13860 : 42 : gcc_rich_location iloc (declarator->parenthesized);
13861 : 42 : iloc.add_fixit_remove (get_start (declarator->parenthesized));
13862 : 42 : iloc.add_fixit_remove (get_finish (declarator->parenthesized));
13863 : 42 : inform (&iloc, "remove parentheses");
13864 : 42 : }
13865 : 169 : }
13866 : 854203220 : if (declarator->kind == cdk_id || declarator->kind == cdk_decomp)
13867 : : break;
13868 : :
13869 : 343915797 : switch (declarator->kind)
13870 : : {
13871 : 3006284 : case cdk_array:
13872 : 6012568 : type = create_array_type_for_decl (dname, type,
13873 : 3006284 : declarator->u.array.bounds,
13874 : 3006284 : declarator->id_loc);
13875 : 3006284 : if (!valid_array_size_p (dname
13876 : : ? declarator->id_loc : input_location,
13877 : : type, dname))
13878 : 267 : type = error_mark_node;
13879 : :
13880 : 3006284 : if (declarator->std_attributes)
13881 : : /* [dcl.array]/1:
13882 : :
13883 : : The optional attribute-specifier-seq appertains to the
13884 : : array type. */
13885 : 174 : cplus_decl_attributes (&type, declarator->std_attributes, 0);
13886 : : break;
13887 : :
13888 : 167996869 : case cdk_function:
13889 : 167996869 : {
13890 : 167996869 : tree arg_types;
13891 : 167996869 : int funcdecl_p;
13892 : :
13893 : : /* Declaring a function type. */
13894 : :
13895 : : /* Pick up type qualifiers which should be applied to `this'. */
13896 : 167996869 : memfn_quals = declarator->u.function.qualifiers;
13897 : : /* Pick up virt-specifiers. */
13898 : 167996869 : virt_specifiers = declarator->u.function.virt_specifiers;
13899 : : /* And ref-qualifier, too */
13900 : 167996869 : rqual = declarator->u.function.ref_qualifier;
13901 : : /* And tx-qualifier. */
13902 : 167996869 : tree tx_qual = declarator->u.function.tx_qualifier;
13903 : : /* Pick up the exception specifications. */
13904 : 167996869 : raises = declarator->u.function.exception_specification;
13905 : : /* If the exception-specification is ill-formed, let's pretend
13906 : : there wasn't one. */
13907 : 167996869 : if (raises == error_mark_node)
13908 : 9 : raises = NULL_TREE;
13909 : :
13910 : 335993738 : auto find_xobj_parm = [](tree parm_list)
13911 : : {
13912 : : /* There is no need to iterate over the list,
13913 : : only the first parm can be a valid xobj parm. */
13914 : 335744939 : if (!parm_list || TREE_PURPOSE (parm_list) != this_identifier)
13915 : : return NULL_TREE;
13916 : : /* If we make it here, we are looking at an xobj parm.
13917 : :
13918 : : Non-null 'purpose' usually means the parm has a default
13919 : : argument, we don't want to violate this assumption. */
13920 : 23831 : TREE_PURPOSE (parm_list) = NULL_TREE;
13921 : 23831 : return TREE_VALUE (parm_list);
13922 : : };
13923 : :
13924 : 167996869 : tree xobj_parm
13925 : 167996869 : = find_xobj_parm (declarator->u.function.parameters);
13926 : 167996869 : is_xobj_member_function = xobj_parm;
13927 : :
13928 : 167996869 : if (xobj_parm && cxx_dialect < cxx23)
13929 : 24 : pedwarn (DECL_SOURCE_LOCATION (xobj_parm), OPT_Wc__23_extensions,
13930 : : "explicit object member function only available "
13931 : : "with %<-std=c++23%> or %<-std=gnu++23%>");
13932 : :
13933 : 167996869 : if (xobj_parm && decl_context == TYPENAME)
13934 : : {
13935 : : /* We inform in every case, just differently depending on what
13936 : : case it is. */
13937 : 6 : auto_diagnostic_group d;
13938 : 6 : bool ptr_type = true;
13939 : : /* If declarator->kind is cdk_function and we are at the end of
13940 : : the declarator chain, we are looking at a function type. */
13941 : 6 : if (!declarator->declarator)
13942 : : {
13943 : 2 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
13944 : : "a function type cannot "
13945 : : "have an explicit object parameter");
13946 : 2 : ptr_type = false;
13947 : : }
13948 : 4 : else if (declarator->declarator->kind == cdk_pointer)
13949 : 2 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
13950 : : "a pointer to function type cannot "
13951 : : "have an explicit object parameter");
13952 : 2 : else if (declarator->declarator->kind == cdk_ptrmem)
13953 : 2 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
13954 : : "a pointer to member function type "
13955 : : "cannot have an explicit object parameter");
13956 : : else
13957 : 0 : gcc_unreachable ();
13958 : :
13959 : : /* The locations being used here are probably not correct. */
13960 : 4 : if (ptr_type)
13961 : 4 : inform (DECL_SOURCE_LOCATION (xobj_parm),
13962 : : "the type of a pointer to explicit object member "
13963 : : "function is a regular pointer to function type");
13964 : : else
13965 : 2 : inform (DECL_SOURCE_LOCATION (xobj_parm),
13966 : : "the type of an explicit object "
13967 : : "member function is a regular function type");
13968 : : /* Ideally we should synthesize the correct syntax
13969 : : for the user, perhaps this could be added later. */
13970 : 6 : }
13971 : : /* Since a valid xobj parm has its purpose cleared in find_xobj_parm
13972 : : the first parm node will never erroneously be detected here. */
13973 : 167996869 : {
13974 : 167996869 : auto_diagnostic_group d;
13975 : 167996869 : bool bad_xobj_parm_encountered = false;
13976 : 167996869 : for (tree parm = declarator->u.function.parameters;
13977 : 421995275 : parm && parm != void_list_node;
13978 : 253998406 : parm = TREE_CHAIN (parm))
13979 : : {
13980 : 253998406 : if (TREE_PURPOSE (parm) != this_identifier)
13981 : 253998400 : continue;
13982 : 6 : bad_xobj_parm_encountered = true;
13983 : 6 : TREE_PURPOSE (parm) = NULL_TREE;
13984 : 6 : gcc_rich_location bad_xobj_parm
13985 : 6 : (DECL_SOURCE_LOCATION (TREE_VALUE (parm)));
13986 : 6 : error_at (&bad_xobj_parm,
13987 : : "only the first parameter of a member function "
13988 : : "can be declared as an explicit object parameter");
13989 : 6 : }
13990 : 167996869 : if (bad_xobj_parm_encountered && xobj_parm)
13991 : 0 : inform (DECL_SOURCE_LOCATION (xobj_parm),
13992 : : "valid explicit object parameter declared here");
13993 : 167996869 : }
13994 : :
13995 : 167996869 : if (reqs)
13996 : 3 : error_at (location_of (reqs), "requires-clause on return type");
13997 : 167996869 : reqs = declarator->u.function.requires_clause;
13998 : :
13999 : : /* Say it's a definition only for the CALL_EXPR
14000 : : closest to the identifier. */
14001 : 167996869 : funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
14002 : :
14003 : : /* Handle a late-specified return type. */
14004 : 167996869 : tree late_return_type = declarator->u.function.late_return_type;
14005 : 167996869 : if (tree auto_node = type_uses_auto (type))
14006 : : {
14007 : 4770970 : if (!late_return_type)
14008 : : {
14009 : 1911736 : if (!funcdecl_p)
14010 : : /* auto (*fp)() = f; is OK. */;
14011 : 1911704 : else if (current_class_type
14012 : 3504328 : && LAMBDA_TYPE_P (current_class_type))
14013 : : /* OK for C++11 lambdas. */;
14014 : 1422810 : else if (cxx_dialect < cxx14)
14015 : : {
14016 : 7 : auto_diagnostic_group d;
14017 : 7 : error_at (typespec_loc, "%qs function uses "
14018 : : "%<auto%> type specifier without "
14019 : : "trailing return type", name);
14020 : 7 : inform (typespec_loc,
14021 : : "deduced return type only available "
14022 : : "with %<-std=c++14%> or %<-std=gnu++14%>");
14023 : 7 : }
14024 : 1422803 : else if (virtualp)
14025 : : {
14026 : 6 : error_at (typespec_loc, "virtual function "
14027 : : "cannot have deduced return type");
14028 : 6 : virtualp = false;
14029 : : }
14030 : : }
14031 : 2859234 : else if (!is_auto (type) && sfk != sfk_conversion)
14032 : : {
14033 : 15 : error_at (typespec_loc, "%qs function with trailing "
14034 : : "return type has %qT as its type rather "
14035 : : "than plain %<auto%>", name, type);
14036 : 270 : return error_mark_node;
14037 : : }
14038 : 2859219 : else if (is_auto (type) && AUTO_IS_DECLTYPE (type))
14039 : : {
14040 : 9 : if (funcdecl_p)
14041 : 3 : error_at (typespec_loc,
14042 : : "%qs function with trailing return type "
14043 : : "has %<decltype(auto)%> as its type "
14044 : : "rather than plain %<auto%>", name);
14045 : : else
14046 : 6 : error_at (typespec_loc,
14047 : : "invalid use of %<decltype(auto)%>");
14048 : 9 : return error_mark_node;
14049 : : }
14050 : 2859210 : else if (is_constrained_auto (type))
14051 : : {
14052 : 6 : if (funcdecl_p)
14053 : 3 : error_at (typespec_loc,
14054 : : "%qs function with trailing return type "
14055 : : "has constrained %<auto%> type specifier "
14056 : : "rather than plain %<auto%>",
14057 : : name);
14058 : : else
14059 : 3 : error_at (typespec_loc,
14060 : : "invalid use of constrained %<auto%> type");
14061 : 6 : return error_mark_node;
14062 : : }
14063 : 4770940 : tree tmpl = CLASS_PLACEHOLDER_TEMPLATE (auto_node);
14064 : 4770940 : if (!tmpl)
14065 : 3769229 : if (tree late_auto = type_uses_auto (late_return_type))
14066 : 20072 : tmpl = CLASS_PLACEHOLDER_TEMPLATE (late_auto);
14067 : 3769229 : if (tmpl)
14068 : : {
14069 : 1001715 : if (!funcdecl_p || !dguide_name_p (unqualified_id))
14070 : : {
14071 : 10 : auto_diagnostic_group g;
14072 : 10 : error_at (typespec_loc, "deduced class "
14073 : : "type %qD in function return type",
14074 : 10 : DECL_NAME (tmpl));
14075 : 10 : inform (DECL_SOURCE_LOCATION (tmpl),
14076 : : "%qD declared here", tmpl);
14077 : 10 : return error_mark_node;
14078 : 10 : }
14079 : 1001705 : else if (!late_return_type)
14080 : : {
14081 : 3 : auto_diagnostic_group d;
14082 : 3 : error_at (declarator->id_loc, "deduction guide "
14083 : : "for %qT must have trailing return "
14084 : 3 : "type", TREE_TYPE (tmpl));
14085 : 3 : inform (DECL_SOURCE_LOCATION (tmpl),
14086 : : "%qD declared here", tmpl);
14087 : 3 : return error_mark_node;
14088 : 3 : }
14089 : 1001702 : else if (CLASS_TYPE_P (late_return_type)
14090 : 1001702 : && CLASSTYPE_TEMPLATE_INFO (late_return_type)
14091 : 2003404 : && (CLASSTYPE_TI_TEMPLATE (late_return_type)
14092 : : == tmpl))
14093 : : /* OK */;
14094 : : else
14095 : 0 : error ("trailing return type %qT of deduction guide "
14096 : : "is not a specialization of %qT",
14097 : 0 : late_return_type, TREE_TYPE (tmpl));
14098 : : }
14099 : : }
14100 : 163225899 : else if (late_return_type
14101 : 163225899 : && sfk != sfk_conversion)
14102 : : {
14103 : 37 : if (late_return_type == error_mark_node)
14104 : : return error_mark_node;
14105 : 37 : if (cxx_dialect < cxx11)
14106 : : /* Not using maybe_warn_cpp0x because this should
14107 : : always be an error. */
14108 : 1 : error_at (typespec_loc,
14109 : : "trailing return type only available "
14110 : : "with %<-std=c++11%> or %<-std=gnu++11%>");
14111 : : else
14112 : 36 : error_at (typespec_loc, "%qs function with trailing "
14113 : : "return type not declared with %<auto%> "
14114 : : "type specifier", name);
14115 : 37 : return error_mark_node;
14116 : : }
14117 : 167996789 : if (late_return_type && sfk == sfk_conversion)
14118 : : {
14119 : 14 : error ("a conversion function cannot have a trailing return type");
14120 : 14 : return error_mark_node;
14121 : : }
14122 : 167996775 : type = splice_late_return_type (type, late_return_type);
14123 : 167996775 : if (type == error_mark_node)
14124 : : return error_mark_node;
14125 : :
14126 : 167996699 : if (late_return_type)
14127 : : {
14128 : 2859116 : late_return_type_p = true;
14129 : 2859116 : type_quals = cp_type_quals (type);
14130 : : }
14131 : :
14132 : 167996699 : if (type_quals != TYPE_UNQUALIFIED)
14133 : : {
14134 : : /* It's wrong, for instance, to issue a -Wignored-qualifiers
14135 : : warning for
14136 : : static_assert(!is_same_v<void(*)(), const void(*)()>);
14137 : : because there the qualifier matters. */
14138 : 12073 : if (funcdecl_p && (SCALAR_TYPE_P (type) || VOID_TYPE_P (type)))
14139 : 232 : warning_at (typespec_loc, OPT_Wignored_qualifiers, "type "
14140 : : "qualifiers ignored on function return type");
14141 : : /* [dcl.fct] "A volatile-qualified return type is
14142 : : deprecated." */
14143 : 12073 : if (type_quals & TYPE_QUAL_VOLATILE)
14144 : 598 : warning_at (typespec_loc, OPT_Wvolatile,
14145 : : "%<volatile%>-qualified return type is "
14146 : : "deprecated");
14147 : :
14148 : : /* We now know that the TYPE_QUALS don't apply to the
14149 : : decl, but to its return type. */
14150 : : type_quals = TYPE_UNQUALIFIED;
14151 : : }
14152 : :
14153 : : /* Error about some types functions can't return. */
14154 : :
14155 : 167996699 : if (TREE_CODE (type) == FUNCTION_TYPE)
14156 : : {
14157 : 30 : error_at (typespec_loc, "%qs declared as function returning "
14158 : : "a function", name);
14159 : 30 : return error_mark_node;
14160 : : }
14161 : 167996669 : if (TREE_CODE (type) == ARRAY_TYPE)
14162 : : {
14163 : 6 : error_at (typespec_loc, "%qs declared as function returning "
14164 : : "an array", name);
14165 : 6 : return error_mark_node;
14166 : : }
14167 : 167996663 : if (constinit_p && funcdecl_p)
14168 : : {
14169 : 15 : error_at (declspecs->locations[ds_constinit],
14170 : : "%<constinit%> on function return type is not "
14171 : : "allowed");
14172 : 15 : return error_mark_node;
14173 : : }
14174 : :
14175 : 167996648 : if (check_decltype_auto (typespec_loc, type))
14176 : 49 : return error_mark_node;
14177 : :
14178 : 167996599 : if (ctype == NULL_TREE
14179 : 167996599 : && decl_context == FIELD
14180 : : && funcdecl_p
14181 : 90446346 : && friendp == 0)
14182 : 86434716 : ctype = current_class_type;
14183 : :
14184 : 167996599 : if (ctype && (sfk == sfk_constructor
14185 : 86434716 : || sfk == sfk_destructor))
14186 : : {
14187 : : /* We are within a class's scope. If our declarator name
14188 : : is the same as the class name, and we are defining
14189 : : a function, then it is a constructor/destructor, and
14190 : : therefore returns a void type. */
14191 : :
14192 : : /* ISO C++ 12.4/2. A destructor may not be declared
14193 : : const or volatile. A destructor may not be static.
14194 : : A destructor may not be declared with ref-qualifier.
14195 : :
14196 : : ISO C++ 12.1. A constructor may not be declared
14197 : : const or volatile. A constructor may not be
14198 : : virtual. A constructor may not be static.
14199 : : A constructor may not be declared with ref-qualifier. */
14200 : 23511594 : if (staticp == 2)
14201 : 9 : error_at (declspecs->locations[ds_storage_class],
14202 : : (flags == DTOR_FLAG)
14203 : : ? G_("destructor cannot be static member "
14204 : : "function")
14205 : : : G_("constructor cannot be static member "
14206 : : "function"));
14207 : 23511594 : if (memfn_quals)
14208 : : {
14209 : 9 : error ((flags == DTOR_FLAG)
14210 : : ? G_("destructors may not be cv-qualified")
14211 : : : G_("constructors may not be cv-qualified"));
14212 : 9 : memfn_quals = TYPE_UNQUALIFIED;
14213 : : }
14214 : :
14215 : 23511594 : if (rqual)
14216 : : {
14217 : 6 : maybe_warn_cpp0x (CPP0X_REF_QUALIFIER);
14218 : 6 : error ((flags == DTOR_FLAG)
14219 : : ? G_("destructors may not be ref-qualified")
14220 : : : G_("constructors may not be ref-qualified"));
14221 : 6 : rqual = REF_QUAL_NONE;
14222 : : }
14223 : :
14224 : 23511594 : if (decl_context == FIELD
14225 : 23511594 : && !member_function_or_else (ctype,
14226 : : current_class_type,
14227 : : flags))
14228 : 0 : return error_mark_node;
14229 : :
14230 : 23511594 : if (flags != DTOR_FLAG)
14231 : : {
14232 : : /* It's a constructor. */
14233 : 20642256 : if (explicitp == 1)
14234 : 4945334 : explicitp = 2;
14235 : 20642256 : if (virtualp)
14236 : : {
14237 : 3 : permerror (declspecs->locations[ds_virtual],
14238 : : "constructors cannot be declared %<virtual%>");
14239 : 3 : virtualp = 0;
14240 : : }
14241 : 20642256 : if (decl_context == FIELD
14242 : 20642256 : && sfk != sfk_constructor)
14243 : 0 : return error_mark_node;
14244 : : }
14245 : 23511594 : if (decl_context == FIELD)
14246 : 23511594 : staticp = 0;
14247 : : }
14248 : 144485005 : else if (friendp)
14249 : : {
14250 : 3718022 : if (virtualp)
14251 : : {
14252 : : /* Cannot be both friend and virtual. */
14253 : 12 : gcc_rich_location richloc (declspecs->locations[ds_virtual]);
14254 : 12 : richloc.add_range (declspecs->locations[ds_friend]);
14255 : 12 : error_at (&richloc, "virtual functions cannot be friends");
14256 : 12 : friendp = 0;
14257 : 12 : }
14258 : 3718022 : if (decl_context == NORMAL)
14259 : 0 : error_at (declarator->id_loc,
14260 : : "friend declaration not in class definition");
14261 : 3718022 : if (current_function_decl && funcdef_flag)
14262 : : {
14263 : 9 : error_at (declarator->id_loc,
14264 : : "cannot define friend function %qs in a local "
14265 : : "class definition", name);
14266 : 9 : friendp = 0;
14267 : : }
14268 : : /* [class.friend]/6: A function can be defined in a friend
14269 : : declaration if the function name is unqualified. */
14270 : 3718022 : if (funcdef_flag && in_namespace)
14271 : : {
14272 : 6 : if (in_namespace == global_namespace)
14273 : 3 : error_at (declarator->id_loc,
14274 : : "friend function definition %qs cannot have "
14275 : : "a name qualified with %<::%>", name);
14276 : : else
14277 : 3 : error_at (declarator->id_loc,
14278 : : "friend function definition %qs cannot have "
14279 : : "a name qualified with %<%D::%>", name,
14280 : : in_namespace);
14281 : : }
14282 : : }
14283 : 140766983 : else if (ctype && sfk == sfk_conversion)
14284 : : {
14285 : 598461 : if (explicitp == 1)
14286 : : {
14287 : 281182 : maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
14288 : 281182 : explicitp = 2;
14289 : : }
14290 : : }
14291 : 140168522 : else if (sfk == sfk_deduction_guide)
14292 : : {
14293 : 1001702 : if (explicitp == 1)
14294 : 167996599 : explicitp = 2;
14295 : : }
14296 : :
14297 : 167996599 : if (xobj_parm)
14298 : : {
14299 : 23831 : if (!ctype
14300 : 23831 : && decl_context == NORMAL
14301 : 49 : && (in_namespace
14302 : 49 : || !declarator->declarator->u.id.qualifying_scope))
14303 : 4 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
14304 : : "a non-member function cannot have "
14305 : : "an explicit object parameter");
14306 : : else
14307 : : {
14308 : 23827 : if (virtualp)
14309 : : {
14310 : 16 : auto_diagnostic_group d;
14311 : 16 : error_at (declspecs->locations[ds_virtual],
14312 : : "an explicit object member function cannot "
14313 : : "be %<virtual%>");
14314 : 16 : inform (DECL_SOURCE_LOCATION (xobj_parm),
14315 : : "explicit object parameter declared here");
14316 : 16 : virtualp = false;
14317 : 16 : }
14318 : 23827 : if (staticp >= 2)
14319 : : {
14320 : 2 : auto_diagnostic_group d;
14321 : 2 : error_at (declspecs->locations[ds_storage_class],
14322 : : "an explicit object member function cannot "
14323 : : "be %<static%>");
14324 : 2 : inform (DECL_SOURCE_LOCATION (xobj_parm),
14325 : : "explicit object parameter declared here");
14326 : 2 : }
14327 : 23827 : if (unqualified_id
14328 : 168020420 : && identifier_p (unqualified_id)
14329 : 47648 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
14330 : 8 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
14331 : : "%qD cannot be an explicit object member "
14332 : : "function", unqualified_id);
14333 : : }
14334 : : }
14335 : 167996599 : tree pushed_scope = NULL_TREE;
14336 : 167996599 : if (funcdecl_p
14337 : 167996599 : && decl_context != FIELD
14338 : 75517019 : && inner_declarator->u.id.qualifying_scope
14339 : 176887500 : && CLASS_TYPE_P (inner_declarator->u.id.qualifying_scope))
14340 : 8889582 : pushed_scope
14341 : 8889582 : = push_scope (inner_declarator->u.id.qualifying_scope);
14342 : :
14343 : 167996599 : arg_types = grokparms (declarator->u.function.parameters, &parms);
14344 : :
14345 : 167996599 : if (pushed_scope)
14346 : 8889582 : pop_scope (pushed_scope);
14347 : :
14348 : 167996599 : if (inner_declarator
14349 : 167540528 : && inner_declarator->kind == cdk_id
14350 : 165669757 : && inner_declarator->u.id.sfk == sfk_destructor
14351 : 3037015 : && arg_types != void_list_node)
14352 : : {
14353 : 20 : error_at (declarator->id_loc,
14354 : : "destructors may not have parameters");
14355 : 20 : arg_types = void_list_node;
14356 : 20 : parms = NULL_TREE;
14357 : 20 : is_xobj_member_function = false;
14358 : : }
14359 : :
14360 : 167996599 : type = build_function_type (type, arg_types);
14361 : :
14362 : 167996599 : tree attrs = declarator->std_attributes;
14363 : 167996599 : if (tx_qual)
14364 : : {
14365 : 242 : tree att = build_tree_list (tx_qual, NULL_TREE);
14366 : : /* transaction_safe applies to the type, but
14367 : : transaction_safe_dynamic applies to the function. */
14368 : 242 : if (is_attribute_p ("transaction_safe", tx_qual))
14369 : 213 : attrs = attr_chainon (attrs, att);
14370 : : else
14371 : 29 : returned_attrs = attr_chainon (returned_attrs, att);
14372 : : }
14373 : :
14374 : : /* Actually apply the contract attributes to the declaration. */
14375 : 167997749 : for (tree *p = &attrs; *p;)
14376 : : {
14377 : 1150 : tree l = *p;
14378 : 1150 : if (cxx_contract_attribute_p (l))
14379 : : {
14380 : 663 : *p = TREE_CHAIN (l);
14381 : : /* Intentionally reverse order of contracts so they're
14382 : : reversed back into their lexical order. */
14383 : 663 : TREE_CHAIN (l) = NULL_TREE;
14384 : 663 : returned_attrs = chainon (l, returned_attrs);
14385 : : }
14386 : : else
14387 : 487 : p = &TREE_CHAIN (l);
14388 : : }
14389 : :
14390 : 167996599 : if (attrs)
14391 : : /* [dcl.fct]/2:
14392 : :
14393 : : The optional attribute-specifier-seq appertains to
14394 : : the function type. */
14395 : 475 : cplus_decl_attributes (&type, attrs, 0);
14396 : :
14397 : 167996599 : if (raises)
14398 : 65209376 : type = build_exception_variant (type, raises);
14399 : : }
14400 : 167996599 : break;
14401 : :
14402 : 172912644 : case cdk_pointer:
14403 : 172912644 : case cdk_reference:
14404 : 172912644 : case cdk_ptrmem:
14405 : : /* Filter out pointers-to-references and references-to-references.
14406 : : We can get these if a TYPE_DECL is used. */
14407 : :
14408 : 172912644 : if (TYPE_REF_P (type))
14409 : : {
14410 : 236 : if (declarator->kind != cdk_reference)
14411 : : {
14412 : 3 : error ("cannot declare pointer to %q#T", type);
14413 : 3 : type = TREE_TYPE (type);
14414 : : }
14415 : :
14416 : : /* In C++0x, we allow reference to reference declarations
14417 : : that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
14418 : : and template type arguments [14.3.1/4 temp.arg.type]. The
14419 : : check for direct reference to reference declarations, which
14420 : : are still forbidden, occurs below. Reasoning behind the change
14421 : : can be found in DR106, DR540, and the rvalue reference
14422 : : proposals. */
14423 : 233 : else if (cxx_dialect == cxx98)
14424 : : {
14425 : 0 : error ("cannot declare reference to %q#T", type);
14426 : 0 : type = TREE_TYPE (type);
14427 : : }
14428 : : }
14429 : 172912408 : else if (VOID_TYPE_P (type))
14430 : : {
14431 : 4438614 : if (declarator->kind == cdk_reference)
14432 : 4 : error ("cannot declare reference to %q#T", type);
14433 : 4438610 : else if (declarator->kind == cdk_ptrmem)
14434 : 3 : error ("cannot declare pointer to %q#T member", type);
14435 : : }
14436 : :
14437 : : /* We now know that the TYPE_QUALS don't apply to the decl,
14438 : : but to the target of the pointer. */
14439 : 172912644 : type_quals = TYPE_UNQUALIFIED;
14440 : :
14441 : : /* This code used to handle METHOD_TYPE, but I don't think it's
14442 : : possible to get it here anymore. */
14443 : 172912644 : gcc_assert (TREE_CODE (type) != METHOD_TYPE);
14444 : 172912644 : if (declarator->kind == cdk_ptrmem
14445 : 1146606 : && TREE_CODE (type) == FUNCTION_TYPE)
14446 : : {
14447 : 955111 : memfn_quals |= type_memfn_quals (type);
14448 : 1910222 : type = build_memfn_type (type,
14449 : 955111 : declarator->u.pointer.class_type,
14450 : : memfn_quals,
14451 : : rqual);
14452 : 955111 : if (type == error_mark_node)
14453 : : return error_mark_node;
14454 : :
14455 : : rqual = REF_QUAL_NONE;
14456 : : memfn_quals = TYPE_UNQUALIFIED;
14457 : : }
14458 : :
14459 : 172912641 : if (TREE_CODE (type) == FUNCTION_TYPE
14460 : 172912641 : && (type_memfn_quals (type) != TYPE_UNQUALIFIED
14461 : 971694 : || type_memfn_rqual (type) != REF_QUAL_NONE))
14462 : 15 : error (declarator->kind == cdk_reference
14463 : : ? G_("cannot declare reference to qualified function type %qT")
14464 : : : G_("cannot declare pointer to qualified function type %qT"),
14465 : : type);
14466 : :
14467 : : /* When the pointed-to type involves components of variable size,
14468 : : care must be taken to ensure that the size evaluation code is
14469 : : emitted early enough to dominate all the possible later uses
14470 : : and late enough for the variables on which it depends to have
14471 : : been assigned.
14472 : :
14473 : : This is expected to happen automatically when the pointed-to
14474 : : type has a name/declaration of it's own, but special attention
14475 : : is required if the type is anonymous.
14476 : :
14477 : : We handle the NORMAL and FIELD contexts here by inserting a
14478 : : dummy statement that just evaluates the size at a safe point
14479 : : and ensures it is not deferred until e.g. within a deeper
14480 : : conditional context (c++/43555).
14481 : :
14482 : : We expect nothing to be needed here for PARM or TYPENAME.
14483 : : Evaluating the size at this point for TYPENAME would
14484 : : actually be incorrect, as we might be in the middle of an
14485 : : expression with side effects on the pointed-to type size
14486 : : "arguments" prior to the pointer declaration point and the
14487 : : size evaluation could end up prior to the side effects. */
14488 : :
14489 : 172912641 : if (!TYPE_NAME (type)
14490 : 5192380 : && (decl_context == NORMAL || decl_context == FIELD)
14491 : 588502 : && at_function_scope_p ()
14492 : 172952794 : && variably_modified_type_p (type, NULL_TREE))
14493 : : {
14494 : 96 : TYPE_NAME (type) = build_decl (UNKNOWN_LOCATION, TYPE_DECL,
14495 : : NULL_TREE, type);
14496 : 96 : add_decl_expr (TYPE_NAME (type));
14497 : : }
14498 : :
14499 : 172912641 : if (declarator->kind == cdk_reference)
14500 : : {
14501 : : /* In C++0x, the type we are creating a reference to might be
14502 : : a typedef which is itself a reference type. In that case,
14503 : : we follow the reference collapsing rules in
14504 : : [7.1.3/8 dcl.typedef] to create the final reference type:
14505 : :
14506 : : "If a typedef TD names a type that is a reference to a type
14507 : : T, an attempt to create the type 'lvalue reference to cv TD'
14508 : : creates the type 'lvalue reference to T,' while an attempt
14509 : : to create the type "rvalue reference to cv TD' creates the
14510 : : type TD."
14511 : : */
14512 : 113308607 : if (VOID_TYPE_P (type))
14513 : : /* We already gave an error. */;
14514 : 113308603 : else if (TYPE_REF_P (type))
14515 : : {
14516 : 233 : if (declarator->u.reference.rvalue_ref)
14517 : : /* Leave type alone. */;
14518 : : else
14519 : 116 : type = cp_build_reference_type (TREE_TYPE (type), false);
14520 : : }
14521 : : else
14522 : 113308370 : type = cp_build_reference_type
14523 : 113308370 : (type, declarator->u.reference.rvalue_ref);
14524 : :
14525 : : /* In C++0x, we need this check for direct reference to
14526 : : reference declarations, which are forbidden by
14527 : : [8.3.2/5 dcl.ref]. Reference to reference declarations
14528 : : are only allowed indirectly through typedefs and template
14529 : : type arguments. Example:
14530 : :
14531 : : void foo(int & &); // invalid ref-to-ref decl
14532 : :
14533 : : typedef int & int_ref;
14534 : : void foo(int_ref &); // valid ref-to-ref decl
14535 : : */
14536 : 113308607 : if (inner_declarator && inner_declarator->kind == cdk_reference)
14537 : 0 : error ("cannot declare reference to %q#T, which is not "
14538 : : "a typedef or a template type argument", type);
14539 : : }
14540 : 59604034 : else if (TREE_CODE (type) == METHOD_TYPE)
14541 : 955108 : type = build_ptrmemfunc_type (build_pointer_type (type));
14542 : 58648926 : else if (declarator->kind == cdk_ptrmem)
14543 : : {
14544 : 191495 : gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
14545 : : != NAMESPACE_DECL);
14546 : 191495 : if (declarator->u.pointer.class_type == error_mark_node)
14547 : : /* We will already have complained. */
14548 : 3 : type = error_mark_node;
14549 : : else
14550 : 191492 : type = build_ptrmem_type (declarator->u.pointer.class_type,
14551 : : type);
14552 : : }
14553 : : else
14554 : 58457431 : type = build_pointer_type (type);
14555 : :
14556 : : /* Process a list of type modifier keywords (such as
14557 : : const or volatile) that were given inside the `*' or `&'. */
14558 : :
14559 : 172912641 : if (declarator->u.pointer.qualifiers)
14560 : : {
14561 : 8124806 : type
14562 : 8124806 : = cp_build_qualified_type (type,
14563 : : declarator->u.pointer.qualifiers);
14564 : 8124806 : type_quals = cp_type_quals (type);
14565 : : }
14566 : :
14567 : : /* Apply C++11 attributes to the pointer, and not to the
14568 : : type pointed to. This is unlike what is done for GNU
14569 : : attributes above. It is to comply with [dcl.ptr]/1:
14570 : :
14571 : : [the optional attribute-specifier-seq (7.6.1) appertains
14572 : : to the pointer and not to the object pointed to]. */
14573 : 172912641 : if (declarator->std_attributes)
14574 : 157 : cplus_decl_attributes (&type, declarator->std_attributes, 0);
14575 : :
14576 : : ctype = NULL_TREE;
14577 : : break;
14578 : :
14579 : : case cdk_error:
14580 : : break;
14581 : :
14582 : 0 : default:
14583 : 0 : gcc_unreachable ();
14584 : : }
14585 : : }
14586 : :
14587 : 880224300 : id_loc = declarator ? declarator->id_loc : input_location;
14588 : :
14589 : 880224300 : if (innermost_code != cdk_function
14590 : : /* Don't check this if it can be the artifical decltype(auto)
14591 : : we created when building a constraint in a compound-requirement:
14592 : : that the type-constraint is plain is going to be checked in
14593 : : cp_parser_compound_requirement. */
14594 : 880224300 : && decl_context != TYPENAME
14595 : 880224300 : && check_decltype_auto (id_loc, type))
14596 : 19 : return error_mark_node;
14597 : :
14598 : : /* A `constexpr' specifier used in an object declaration declares
14599 : : the object as `const'. */
14600 : 880224281 : if (constexpr_p && innermost_code != cdk_function)
14601 : : {
14602 : : /* DR1688 says that a `constexpr' specifier in combination with
14603 : : `volatile' is valid. */
14604 : :
14605 : 12668554 : if (!TYPE_REF_P (type))
14606 : : {
14607 : 12658869 : type_quals |= TYPE_QUAL_CONST;
14608 : 12658869 : type = cp_build_qualified_type (type, type_quals);
14609 : : }
14610 : : }
14611 : :
14612 : 510212459 : if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
14613 : 1817151 : && !FUNC_OR_METHOD_TYPE_P (type)
14614 : 881188503 : && !variable_template_p (TREE_OPERAND (unqualified_id, 0)))
14615 : : {
14616 : 0 : error ("template-id %qD used as a declarator",
14617 : : unqualified_id);
14618 : 0 : unqualified_id = dname;
14619 : : }
14620 : :
14621 : : /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
14622 : : qualified with a class-name, turn it into a METHOD_TYPE, unless
14623 : : we know that the function is static. We take advantage of this
14624 : : opportunity to do other processing that pertains to entities
14625 : : explicitly declared to be class members. Note that if DECLARATOR
14626 : : is non-NULL, we know it is a cdk_id declarator; otherwise, we
14627 : : would not have exited the loop above. */
14628 : 880224281 : if (declarator
14629 : 510287407 : && declarator->kind == cdk_id
14630 : 510212459 : && declarator->u.id.qualifying_scope
14631 : 889583276 : && MAYBE_CLASS_TYPE_P (declarator->u.id.qualifying_scope))
14632 : : {
14633 : 9261627 : ctype = declarator->u.id.qualifying_scope;
14634 : 9261627 : ctype = TYPE_MAIN_VARIANT (ctype);
14635 : 9261627 : template_count = num_template_headers_for_class (ctype);
14636 : :
14637 : 9261627 : if (ctype == current_class_type)
14638 : : {
14639 : 54 : if (friendp)
14640 : : {
14641 : 15 : permerror (declspecs->locations[ds_friend],
14642 : : "member functions are implicitly "
14643 : : "friends of their class");
14644 : 15 : friendp = 0;
14645 : : }
14646 : : else
14647 : 39 : permerror (id_loc, "extra qualification %<%T::%> on member %qs",
14648 : : ctype, name);
14649 : : }
14650 : 9261573 : else if (/* If the qualifying type is already complete, then we
14651 : : can skip the following checks. */
14652 : 9261573 : !COMPLETE_TYPE_P (ctype)
14653 : 150 : && (/* If the function is being defined, then
14654 : : qualifying type must certainly be complete. */
14655 : : funcdef_flag
14656 : : /* A friend declaration of "T::f" is OK, even if
14657 : : "T" is a template parameter. But, if this
14658 : : function is not a friend, the qualifying type
14659 : : must be a class. */
14660 : 111 : || (!friendp && !CLASS_TYPE_P (ctype))
14661 : : /* For a declaration, the type need not be
14662 : : complete, if either it is dependent (since there
14663 : : is no meaningful definition of complete in that
14664 : : case) or the qualifying class is currently being
14665 : : defined. */
14666 : 123 : || !(dependent_type_p (ctype)
14667 : 24 : || currently_open_class (ctype)))
14668 : : /* Check that the qualifying type is complete. */
14669 : 9261639 : && !complete_type_or_else (ctype, NULL_TREE))
14670 : 66 : return error_mark_node;
14671 : 9261507 : else if (TREE_CODE (type) == FUNCTION_TYPE)
14672 : : {
14673 : 8889819 : if (current_class_type
14674 : 264 : && (!friendp || funcdef_flag || initialized))
14675 : : {
14676 : 59 : error_at (id_loc, funcdef_flag || initialized
14677 : : ? G_("cannot define member function %<%T::%s%> "
14678 : : "within %qT")
14679 : : : G_("cannot declare member function %<%T::%s%> "
14680 : : "within %qT"),
14681 : : ctype, name, current_class_type);
14682 : 49 : return error_mark_node;
14683 : : }
14684 : : }
14685 : 371688 : else if (typedef_p && current_class_type)
14686 : : {
14687 : 0 : error_at (id_loc, "cannot declare member %<%T::%s%> within %qT",
14688 : : ctype, name, current_class_type);
14689 : 0 : return error_mark_node;
14690 : : }
14691 : : }
14692 : :
14693 : 880224166 : if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
14694 : 48939642 : ctype = current_class_type;
14695 : :
14696 : : /* Now TYPE has the actual type. */
14697 : :
14698 : 880224166 : if (returned_attrs)
14699 : : {
14700 : 3328 : if (attrlist)
14701 : 3328 : *attrlist = attr_chainon (returned_attrs, *attrlist);
14702 : : else
14703 : : attrlist = &returned_attrs;
14704 : : }
14705 : :
14706 : 880224166 : if (declarator
14707 : 510287292 : && declarator->kind == cdk_id
14708 : 510212344 : && declarator->std_attributes
14709 : 342624 : && attrlist != NULL)
14710 : : {
14711 : : /* [dcl.meaning]/1: The optional attribute-specifier-seq following
14712 : : a declarator-id appertains to the entity that is declared. */
14713 : 342621 : if (declarator->std_attributes != error_mark_node)
14714 : 342603 : *attrlist = attr_chainon (declarator->std_attributes, *attrlist);
14715 : : else
14716 : : /* We should have already diagnosed the issue (c++/78344). */
14717 : 18 : gcc_assert (seen_error ());
14718 : : }
14719 : :
14720 : : /* Handle parameter packs. */
14721 : 880224166 : if (parameter_pack_p)
14722 : : {
14723 : 2767822 : if (decl_context == PARM)
14724 : : /* Turn the type into a pack expansion.*/
14725 : 2767822 : type = make_pack_expansion (type);
14726 : : else
14727 : 0 : error ("non-parameter %qs cannot be a parameter pack", name);
14728 : : }
14729 : :
14730 : 880224166 : if ((decl_context == FIELD || decl_context == PARM)
14731 : 404018378 : && !processing_template_decl
14732 : 1008693259 : && variably_modified_type_p (type, NULL_TREE))
14733 : : {
14734 : 12 : if (decl_context == FIELD)
14735 : 6 : error_at (id_loc,
14736 : : "data member may not have variably modified type %qT", type);
14737 : : else
14738 : 6 : error_at (id_loc,
14739 : : "parameter may not have variably modified type %qT", type);
14740 : 12 : type = error_mark_node;
14741 : : }
14742 : :
14743 : 880224166 : if (explicitp == 1 || (explicitp && friendp))
14744 : : {
14745 : : /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
14746 : : in the declaration of a constructor or conversion function within
14747 : : a class definition. */
14748 : 28 : if (!current_class_type)
14749 : 13 : error_at (declspecs->locations[ds_explicit],
14750 : : "%<explicit%> outside class declaration");
14751 : 15 : else if (friendp)
14752 : 12 : error_at (declspecs->locations[ds_explicit],
14753 : : "%<explicit%> in friend declaration");
14754 : : else
14755 : 3 : error_at (declspecs->locations[ds_explicit],
14756 : : "only declarations of constructors and conversion operators "
14757 : : "can be %<explicit%>");
14758 : : explicitp = 0;
14759 : : }
14760 : :
14761 : 880224166 : if (storage_class == sc_mutable)
14762 : : {
14763 : 141549 : location_t sloc = declspecs->locations[ds_storage_class];
14764 : 141549 : if (decl_context != FIELD || friendp)
14765 : : {
14766 : 12 : error_at (sloc, "non-member %qs cannot be declared %<mutable%>",
14767 : : name);
14768 : 12 : storage_class = sc_none;
14769 : : }
14770 : 141537 : else if (decl_context == TYPENAME || typedef_p)
14771 : : {
14772 : 0 : error_at (sloc,
14773 : : "non-object member %qs cannot be declared %<mutable%>",
14774 : : name);
14775 : 0 : storage_class = sc_none;
14776 : : }
14777 : 141537 : else if (FUNC_OR_METHOD_TYPE_P (type))
14778 : : {
14779 : 3 : error_at (sloc, "function %qs cannot be declared %<mutable%>",
14780 : : name);
14781 : 3 : storage_class = sc_none;
14782 : : }
14783 : 141534 : else if (staticp)
14784 : : {
14785 : 0 : error_at (sloc, "%<static%> %qs cannot be declared %<mutable%>",
14786 : : name);
14787 : 0 : storage_class = sc_none;
14788 : : }
14789 : 141534 : else if (type_quals & TYPE_QUAL_CONST)
14790 : : {
14791 : 9 : error_at (sloc, "%<const%> %qs cannot be declared %<mutable%>",
14792 : : name);
14793 : 9 : storage_class = sc_none;
14794 : : }
14795 : 141525 : else if (TYPE_REF_P (type))
14796 : : {
14797 : 6 : permerror (sloc, "reference %qs cannot be declared %<mutable%>",
14798 : : name);
14799 : 6 : storage_class = sc_none;
14800 : : }
14801 : : }
14802 : :
14803 : : /* If this is declaring a typedef name, return a TYPE_DECL. */
14804 : 880224166 : if (typedef_p && decl_context != TYPENAME)
14805 : : {
14806 : 42026041 : bool alias_p = decl_spec_seq_has_spec_p (declspecs, ds_alias);
14807 : 42026041 : tree decl;
14808 : :
14809 : 42026041 : if (funcdef_flag)
14810 : : {
14811 : 6 : if (decl_context == NORMAL)
14812 : 3 : error_at (id_loc,
14813 : : "typedef may not be a function definition");
14814 : : else
14815 : 3 : error_at (id_loc,
14816 : : "typedef may not be a member function definition");
14817 : 6 : return error_mark_node;
14818 : : }
14819 : :
14820 : : /* This declaration:
14821 : :
14822 : : typedef void f(int) const;
14823 : :
14824 : : declares a function type which is not a member of any
14825 : : particular class, but which is cv-qualified; for
14826 : : example "f S::*" declares a pointer to a const-qualified
14827 : : member function of S. We record the cv-qualification in the
14828 : : function type. */
14829 : 42026035 : if ((rqual || memfn_quals) && TREE_CODE (type) == FUNCTION_TYPE)
14830 : : {
14831 : 62 : type = apply_memfn_quals (type, memfn_quals, rqual);
14832 : :
14833 : : /* We have now dealt with these qualifiers. */
14834 : 62 : memfn_quals = TYPE_UNQUALIFIED;
14835 : 62 : rqual = REF_QUAL_NONE;
14836 : : }
14837 : :
14838 : 42026035 : if (type_uses_auto (type))
14839 : : {
14840 : 41 : if (alias_p)
14841 : 19 : error_at (declspecs->locations[ds_type_spec],
14842 : : "%<auto%> not allowed in alias declaration");
14843 : : else
14844 : 22 : error_at (declspecs->locations[ds_type_spec],
14845 : : "typedef declared %<auto%>");
14846 : 41 : type = error_mark_node;
14847 : : }
14848 : :
14849 : 42026035 : if (reqs)
14850 : 3 : error_at (location_of (reqs), "requires-clause on typedef");
14851 : :
14852 : 42026035 : if (id_declarator && declarator->u.id.qualifying_scope)
14853 : : {
14854 : 22 : error_at (id_loc, "typedef name may not be a nested-name-specifier");
14855 : 22 : type = error_mark_node;
14856 : : }
14857 : :
14858 : 42026035 : if (decl_context == FIELD)
14859 : 22825226 : decl = build_lang_decl_loc (id_loc, TYPE_DECL, unqualified_id, type);
14860 : : else
14861 : 19200809 : decl = build_decl (id_loc, TYPE_DECL, unqualified_id, type);
14862 : :
14863 : 42026035 : if (decl_context != FIELD)
14864 : : {
14865 : 19200809 : if (!current_function_decl)
14866 : 8060455 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
14867 : 11140354 : else if (DECL_MAYBE_IN_CHARGE_CDTOR_P (current_function_decl))
14868 : : /* The TYPE_DECL is "abstract" because there will be
14869 : : clones of this constructor/destructor, and there will
14870 : : be copies of this TYPE_DECL generated in those
14871 : : clones. The decloning optimization (for space) may
14872 : : revert this subsequently if it determines that
14873 : : the clones should share a common implementation. */
14874 : 138232 : DECL_ABSTRACT_P (decl) = true;
14875 : :
14876 : 19200809 : set_originating_module (decl);
14877 : : }
14878 : 22825226 : else if (current_class_type
14879 : 22825226 : && constructor_name_p (unqualified_id, current_class_type))
14880 : 3 : permerror (id_loc, "ISO C++ forbids nested type %qD with same name "
14881 : : "as enclosing class",
14882 : : unqualified_id);
14883 : :
14884 : : /* If the user declares "typedef struct {...} foo" then the
14885 : : struct will have an anonymous name. Fill that name in now.
14886 : : Nothing can refer to it, so nothing needs know about the name
14887 : : change. */
14888 : 42026035 : if (type != error_mark_node
14889 : 42025972 : && unqualified_id
14890 : 42025969 : && TYPE_NAME (type)
14891 : 39214684 : && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
14892 : 78513885 : && TYPE_UNNAMED_P (type)
14893 : 379992 : && declspecs->type_definition_p
14894 : 379922 : && attributes_naming_typedef_ok (*attrlist)
14895 : 42405954 : && cp_type_quals (type) == TYPE_UNQUALIFIED)
14896 : 379901 : name_unnamed_type (type, decl);
14897 : :
14898 : 42026035 : if (signed_p
14899 : 42026035 : || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
14900 : 364619 : C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
14901 : :
14902 : 42026035 : bad_specifiers (decl, BSP_TYPE, virtualp,
14903 : : memfn_quals != TYPE_UNQUALIFIED,
14904 : : inlinep, friendp, raises != NULL_TREE,
14905 : : declspecs->locations);
14906 : :
14907 : 42026035 : if (alias_p)
14908 : : /* Acknowledge that this was written:
14909 : : `using analias = atype;'. */
14910 : 15798572 : TYPE_DECL_ALIAS_P (decl) = 1;
14911 : :
14912 : 42026035 : return decl;
14913 : : }
14914 : :
14915 : : /* Detect the case of an array type of unspecified size
14916 : : which came, as such, direct from a typedef name.
14917 : : We must copy the type, so that the array's domain can be
14918 : : individually set by the object's initializer. */
14919 : :
14920 : 838198125 : if (type && typedef_type
14921 : 812141577 : && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
14922 : 838697873 : && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
14923 : 79 : type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
14924 : :
14925 : : /* Detect where we're using a typedef of function type to declare a
14926 : : function. PARMS will not be set, so we must create it now. */
14927 : :
14928 : 838198125 : if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
14929 : : {
14930 : 14787 : tree decls = NULL_TREE;
14931 : 14787 : tree args;
14932 : :
14933 : 14787 : for (args = TYPE_ARG_TYPES (type);
14934 : 32040 : args && args != void_list_node;
14935 : 17253 : args = TREE_CHAIN (args))
14936 : : {
14937 : 17253 : tree decl = cp_build_parm_decl (NULL_TREE, NULL_TREE,
14938 : 17253 : TREE_VALUE (args));
14939 : :
14940 : 17253 : DECL_CHAIN (decl) = decls;
14941 : 17253 : decls = decl;
14942 : : }
14943 : :
14944 : 14787 : parms = nreverse (decls);
14945 : :
14946 : 14787 : if (decl_context != TYPENAME)
14947 : : {
14948 : : /* The qualifiers on the function type become the qualifiers on
14949 : : the non-static member function. */
14950 : 14105 : memfn_quals |= type_memfn_quals (type);
14951 : 14105 : rqual = type_memfn_rqual (type);
14952 : 14105 : type_quals = TYPE_UNQUALIFIED;
14953 : 14105 : raises = TYPE_RAISES_EXCEPTIONS (type);
14954 : : }
14955 : : }
14956 : :
14957 : : /* If this is a type name (such as, in a cast or sizeof),
14958 : : compute the type and return it now. */
14959 : :
14960 : 838197443 : if (decl_context == TYPENAME)
14961 : : {
14962 : : /* Note that here we don't care about type_quals. */
14963 : :
14964 : : /* Special case: "friend class foo" looks like a TYPENAME context. */
14965 : 327565688 : if (friendp)
14966 : : {
14967 : 0 : if (inlinep)
14968 : : {
14969 : 0 : error ("%<inline%> specified for friend class declaration");
14970 : 0 : inlinep = 0;
14971 : : }
14972 : :
14973 : 0 : if (!current_aggr)
14974 : : {
14975 : : /* Don't allow friend declaration without a class-key. */
14976 : 0 : if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
14977 : 0 : permerror (input_location, "template parameters cannot be friends");
14978 : 0 : else if (TREE_CODE (type) == TYPENAME_TYPE)
14979 : 0 : permerror (input_location, "friend declaration requires class-key, "
14980 : : "i.e. %<friend class %T::%D%>",
14981 : 0 : TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
14982 : : else
14983 : 0 : permerror (input_location, "friend declaration requires class-key, "
14984 : : "i.e. %<friend %#T%>",
14985 : : type);
14986 : : }
14987 : :
14988 : : /* Only try to do this stuff if we didn't already give up. */
14989 : 0 : if (type != integer_type_node)
14990 : : {
14991 : : /* A friendly class? */
14992 : 0 : if (current_class_type)
14993 : 0 : make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
14994 : : /*complain=*/true);
14995 : : else
14996 : 0 : error ("trying to make class %qT a friend of global scope",
14997 : : type);
14998 : :
14999 : 0 : type = void_type_node;
15000 : : }
15001 : : }
15002 : 327565688 : else if (memfn_quals || rqual)
15003 : : {
15004 : 63780 : if (ctype == NULL_TREE
15005 : 63780 : && TREE_CODE (type) == METHOD_TYPE)
15006 : 0 : ctype = TYPE_METHOD_BASETYPE (type);
15007 : :
15008 : 63780 : if (ctype)
15009 : 0 : type = build_memfn_type (type, ctype, memfn_quals, rqual);
15010 : : /* Core issue #547: need to allow this in template type args.
15011 : : Allow it in general in C++11 for alias-declarations. */
15012 : 63780 : else if ((template_type_arg || cxx_dialect >= cxx11)
15013 : 63778 : && TREE_CODE (type) == FUNCTION_TYPE)
15014 : 63776 : type = apply_memfn_quals (type, memfn_quals, rqual);
15015 : : else
15016 : 4 : error ("invalid qualifiers on non-member function type");
15017 : : }
15018 : :
15019 : 327565688 : if (reqs)
15020 : 3 : error_at (location_of (reqs), "requires-clause on type-id");
15021 : :
15022 : 327565688 : return type;
15023 : : }
15024 : 510632437 : else if (unqualified_id == NULL_TREE && decl_context != PARM
15025 : 676189 : && decl_context != CATCHPARM
15026 : 206568 : && TREE_CODE (type) != UNION_TYPE
15027 : 206332 : && ! bitfield
15028 : 206332 : && innermost_code != cdk_decomp)
15029 : : {
15030 : 9 : error ("abstract declarator %qT used as declaration", type);
15031 : 9 : return error_mark_node;
15032 : : }
15033 : :
15034 : 510632428 : if (!FUNC_OR_METHOD_TYPE_P (type))
15035 : : {
15036 : : /* Only functions may be declared using an operator-function-id. */
15037 : 344999745 : if (dname && IDENTIFIER_ANY_OP_P (dname))
15038 : : {
15039 : 8 : error_at (id_loc, "declaration of %qD as non-function", dname);
15040 : 8 : return error_mark_node;
15041 : : }
15042 : :
15043 : 344999737 : if (reqs)
15044 : 15 : error_at (location_of (reqs),
15045 : : "requires-clause on declaration of non-function type %qT",
15046 : : type);
15047 : : }
15048 : :
15049 : : /* We don't check parameter types here because we can emit a better
15050 : : error message later. */
15051 : 510632420 : if (decl_context != PARM)
15052 : : {
15053 : 245706385 : type = check_var_type (unqualified_id, type, id_loc);
15054 : 245706385 : if (type == error_mark_node)
15055 : : return error_mark_node;
15056 : : }
15057 : :
15058 : : /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
15059 : : or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
15060 : :
15061 : 510632338 : if (decl_context == PARM || decl_context == CATCHPARM)
15062 : : {
15063 : 265407744 : if (ctype || in_namespace)
15064 : 0 : error ("cannot use %<::%> in parameter declaration");
15065 : :
15066 : 265407744 : tree auto_node = type_uses_auto (type);
15067 : 265407744 : if (auto_node && !(cxx_dialect >= cxx17 && template_parm_flag))
15068 : : {
15069 : 119 : bool err_p = true;
15070 : 119 : if (cxx_dialect >= cxx14)
15071 : : {
15072 : 210 : if (decl_context == PARM && AUTO_IS_DECLTYPE (auto_node))
15073 : 3 : error_at (typespec_loc,
15074 : : "cannot declare a parameter with %<decltype(auto)%>");
15075 : 108 : else if (tree c = CLASS_PLACEHOLDER_TEMPLATE (auto_node))
15076 : : {
15077 : 4 : auto_diagnostic_group g;
15078 : 4 : gcc_rich_location richloc (typespec_loc);
15079 : 4 : richloc.add_fixit_insert_after ("<>");
15080 : 4 : error_at (&richloc,
15081 : : "missing template argument list after %qE; template "
15082 : : "placeholder not permitted in parameter", c);
15083 : 4 : if (decl_context == PARM && cxx_dialect >= cxx20)
15084 : 3 : inform (typespec_loc, "or use %<auto%> for an "
15085 : : "abbreviated function template");
15086 : 4 : inform (DECL_SOURCE_LOCATION (c), "%qD declared here", c);
15087 : 4 : }
15088 : 104 : else if (decl_context == CATCHPARM || template_parm_flag)
15089 : 14 : error_at (typespec_loc,
15090 : : "%<auto%> parameter not permitted in this context");
15091 : : else
15092 : : /* Do not issue an error while tentatively parsing a function
15093 : : parameter: for T t(auto(a), 42);, when we just saw the 1st
15094 : : parameter, we don't know yet that this construct won't be
15095 : : a function declaration. Defer the checking to
15096 : : cp_parser_parameter_declaration_clause. */
15097 : : err_p = false;
15098 : : }
15099 : : else
15100 : 8 : error_at (typespec_loc, "parameter declared %<auto%>");
15101 : 29 : if (err_p)
15102 : 29 : type = error_mark_node;
15103 : : }
15104 : :
15105 : : /* A parameter declared as an array of T is really a pointer to T.
15106 : : One declared as a function is really a pointer to a function.
15107 : : One declared as a member is really a pointer to member. */
15108 : :
15109 : 265407744 : if (TREE_CODE (type) == ARRAY_TYPE)
15110 : : {
15111 : : /* Transfer const-ness of array into that of type pointed to. */
15112 : 710733 : type = build_pointer_type (TREE_TYPE (type));
15113 : 710733 : type_quals = TYPE_UNQUALIFIED;
15114 : 710733 : array_parameter_p = true;
15115 : : }
15116 : 264697011 : else if (TREE_CODE (type) == FUNCTION_TYPE)
15117 : 104283 : type = build_pointer_type (type);
15118 : : }
15119 : :
15120 : 121810546 : if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
15121 : : /* Don't convert xobj member functions to METHOD_TYPE. */
15122 : 95324319 : && !is_xobj_member_function
15123 : 597841008 : && !(unqualified_id
15124 : 174405842 : && identifier_p (unqualified_id)
15125 : 87208364 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id)))
15126 : : {
15127 : 87197478 : cp_cv_quals real_quals = memfn_quals;
15128 : 87197478 : if (cxx_dialect < cxx14 && constexpr_p
15129 : 617121 : && sfk != sfk_constructor && sfk != sfk_destructor)
15130 : 3663 : real_quals |= TYPE_QUAL_CONST;
15131 : 87197478 : type = build_memfn_type (type, ctype, real_quals, rqual);
15132 : : }
15133 : :
15134 : 510632338 : {
15135 : 510632338 : tree decl = NULL_TREE;
15136 : :
15137 : 510632338 : if (decl_context == PARM)
15138 : : {
15139 : 264926035 : decl = cp_build_parm_decl (NULL_TREE, unqualified_id, type);
15140 : 264926035 : DECL_ARRAY_PARAMETER_P (decl) = array_parameter_p;
15141 : :
15142 : 264926035 : bad_specifiers (decl, BSP_PARM, virtualp,
15143 : : memfn_quals != TYPE_UNQUALIFIED,
15144 : : inlinep, friendp, raises != NULL_TREE,
15145 : : declspecs->locations);
15146 : : }
15147 : 245706303 : else if (decl_context == FIELD)
15148 : : {
15149 : 116267098 : if (!staticp && !friendp && !FUNC_OR_METHOD_TYPE_P (type))
15150 : 16403320 : if (tree auto_node = type_uses_auto (type))
15151 : : {
15152 : 19 : location_t tloc = declspecs->locations[ds_type_spec];
15153 : 19 : if (CLASS_PLACEHOLDER_TEMPLATE (auto_node))
15154 : 4 : error_at (tloc, "invalid use of template-name %qE without an "
15155 : : "argument list",
15156 : 4 : CLASS_PLACEHOLDER_TEMPLATE (auto_node));
15157 : : else
15158 : 15 : error_at (tloc, "non-static data member declared with "
15159 : : "placeholder %qT", auto_node);
15160 : 19 : type = error_mark_node;
15161 : : }
15162 : :
15163 : : /* The C99 flexible array extension. */
15164 : 98464025 : if (!staticp && TREE_CODE (type) == ARRAY_TYPE
15165 : 117335000 : && TYPE_DOMAIN (type) == NULL_TREE)
15166 : : {
15167 : 1395 : if (ctype
15168 : 1395 : && (TREE_CODE (ctype) == UNION_TYPE
15169 : 1395 : || TREE_CODE (ctype) == QUAL_UNION_TYPE))
15170 : 84 : pedwarn (id_loc, OPT_Wpedantic,
15171 : : "flexible array member in union is a GCC extension");
15172 : :
15173 : : else
15174 : : {
15175 : : /* Array is a flexible member. */
15176 : 1311 : if (name)
15177 : 1311 : pedwarn (id_loc, OPT_Wpedantic,
15178 : : "ISO C++ forbids flexible array member %qs", name);
15179 : : else
15180 : : pedwarn (input_location, OPT_Wpedantic,
15181 : : "ISO C++ forbids flexible array members");
15182 : :
15183 : : /* Flexible array member has a null domain. */
15184 : 1311 : type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
15185 : : }
15186 : : }
15187 : :
15188 : 116267098 : if (type == error_mark_node)
15189 : : {
15190 : : /* Happens when declaring arrays of sizes which
15191 : : are error_mark_node, for example. */
15192 : 19 : decl = NULL_TREE;
15193 : : }
15194 : 116267079 : else if (in_namespace && !friendp)
15195 : : {
15196 : : /* Something like struct S { int N::j; }; */
15197 : 6 : error_at (id_loc, "invalid use of %<::%>");
15198 : 6 : return error_mark_node;
15199 : : }
15200 : 116267073 : else if (FUNC_OR_METHOD_TYPE_P (type) && unqualified_id)
15201 : : {
15202 : 90152514 : int publicp = 0;
15203 : 90152514 : tree function_context;
15204 : :
15205 : 90152514 : if (friendp == 0)
15206 : : {
15207 : : /* This should never happen in pure C++ (the check
15208 : : could be an assert). It could happen in
15209 : : Objective-C++ if someone writes invalid code that
15210 : : uses a function declaration for an instance
15211 : : variable or property (instance variables and
15212 : : properties are parsed as FIELD_DECLs, but they are
15213 : : part of an Objective-C class, not a C++ class).
15214 : : That code is invalid and is caught by this
15215 : : check. */
15216 : 86434549 : if (!ctype)
15217 : : {
15218 : 0 : error ("declaration of function %qD in invalid context",
15219 : : unqualified_id);
15220 : 0 : return error_mark_node;
15221 : : }
15222 : :
15223 : : /* ``A union may [ ... ] not [ have ] virtual functions.''
15224 : : ARM 9.5 */
15225 : 86434549 : if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
15226 : : {
15227 : 3 : error_at (declspecs->locations[ds_virtual],
15228 : : "function %qD declared %<virtual%> inside a union",
15229 : : unqualified_id);
15230 : 3 : return error_mark_node;
15231 : : }
15232 : :
15233 : 3927778 : if (virtualp
15234 : 94080289 : && identifier_p (unqualified_id)
15235 : 3927778 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
15236 : : {
15237 : 9 : error_at (declspecs->locations[ds_virtual],
15238 : : "%qD cannot be declared %<virtual%>, since it "
15239 : : "is always static", unqualified_id);
15240 : 9 : virtualp = 0;
15241 : : }
15242 : : }
15243 : :
15244 : : /* Check that the name used for a destructor makes sense. */
15245 : 90152511 : if (sfk == sfk_destructor)
15246 : : {
15247 : 2869374 : tree uqname = id_declarator->u.id.unqualified_name;
15248 : :
15249 : 2869374 : if (!ctype)
15250 : : {
15251 : 12 : gcc_assert (friendp);
15252 : 12 : error_at (id_loc, "expected qualified name in friend "
15253 : : "declaration for destructor %qD", uqname);
15254 : 12 : return error_mark_node;
15255 : : }
15256 : :
15257 : 2869362 : if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
15258 : : {
15259 : 9 : error_at (id_loc, "declaration of %qD as member of %qT",
15260 : : uqname, ctype);
15261 : 9 : return error_mark_node;
15262 : : }
15263 : 2869353 : if (concept_p)
15264 : : {
15265 : 9 : error_at (declspecs->locations[ds_concept],
15266 : : "a destructor cannot be %qs", "concept");
15267 : 9 : return error_mark_node;
15268 : : }
15269 : 2869344 : if (constexpr_p && cxx_dialect < cxx20)
15270 : : {
15271 : 6 : error_at (declspecs->locations[ds_constexpr],
15272 : : "%<constexpr%> destructors only available"
15273 : : " with %<-std=c++20%> or %<-std=gnu++20%>");
15274 : 6 : return error_mark_node;
15275 : : }
15276 : 2869338 : if (consteval_p)
15277 : : {
15278 : 3 : error_at (declspecs->locations[ds_consteval],
15279 : : "a destructor cannot be %qs", "consteval");
15280 : 3 : return error_mark_node;
15281 : : }
15282 : : }
15283 : 87283137 : else if (sfk == sfk_constructor && friendp && !ctype)
15284 : : {
15285 : 0 : error ("expected qualified name in friend declaration "
15286 : : "for constructor %qD",
15287 : 0 : id_declarator->u.id.unqualified_name);
15288 : 0 : return error_mark_node;
15289 : : }
15290 : 90152472 : if (sfk == sfk_constructor)
15291 : 20642280 : if (concept_p)
15292 : : {
15293 : 9 : error_at (declspecs->locations[ds_concept],
15294 : : "a constructor cannot be %<concept%>");
15295 : 9 : return error_mark_node;
15296 : : }
15297 : 69510192 : if (concept_p)
15298 : : {
15299 : 9 : error_at (declspecs->locations[ds_concept],
15300 : : "a concept cannot be a member function");
15301 : 9 : concept_p = false;
15302 : : }
15303 : 90152454 : else if (consteval_p
15304 : 90260739 : && identifier_p (unqualified_id)
15305 : 90260730 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
15306 : : {
15307 : 9 : error_at (declspecs->locations[ds_consteval],
15308 : : "%qD cannot be %qs", unqualified_id, "consteval");
15309 : 9 : consteval_p = false;
15310 : : }
15311 : :
15312 : 90152463 : if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
15313 : : {
15314 : 11244 : tree tmpl = TREE_OPERAND (unqualified_id, 0);
15315 : 11244 : if (variable_template_p (tmpl))
15316 : : {
15317 : 3 : auto_diagnostic_group d;
15318 : 3 : error_at (id_loc, "specialization of variable template "
15319 : : "%qD declared as function", tmpl);
15320 : 3 : inform (DECL_SOURCE_LOCATION (tmpl),
15321 : : "variable template declared here");
15322 : 3 : return error_mark_node;
15323 : 3 : }
15324 : : }
15325 : :
15326 : : /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
15327 : 90152460 : function_context
15328 : 90152460 : = (ctype != NULL_TREE
15329 : 90152460 : ? decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE);
15330 : 180304920 : publicp = ((! friendp || ! staticp)
15331 : 90152460 : && function_context == NULL_TREE);
15332 : :
15333 : 90152460 : decl = grokfndecl (ctype, type,
15334 : 90152460 : TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
15335 : : ? unqualified_id : dname,
15336 : : parms,
15337 : : unqualified_id,
15338 : : declspecs,
15339 : : reqs,
15340 : : virtualp, flags, memfn_quals, rqual, raises,
15341 : : friendp ? -1 : 0, friendp, publicp,
15342 : 90152460 : inlinep | (2 * constexpr_p) | (4 * concept_p)
15343 : 90152460 : | (8 * consteval_p),
15344 : : initialized == SD_DELETED,
15345 : : is_xobj_member_function, sfk,
15346 : : funcdef_flag, late_return_type_p,
15347 : : template_count, in_namespace,
15348 : : attrlist, id_loc);
15349 : 90152460 : decl = set_virt_specifiers (decl, virt_specifiers);
15350 : 90152460 : if (decl == NULL_TREE)
15351 : 98 : return error_mark_node;
15352 : : #if 0
15353 : : /* This clobbers the attrs stored in `decl' from `attrlist'. */
15354 : : /* The decl and setting of decl_attr is also turned off. */
15355 : : decl = build_decl_attribute_variant (decl, decl_attr);
15356 : : #endif
15357 : :
15358 : : /* [class.conv.ctor]
15359 : :
15360 : : A constructor declared without the function-specifier
15361 : : explicit that can be called with a single parameter
15362 : : specifies a conversion from the type of its first
15363 : : parameter to the type of its class. Such a constructor
15364 : : is called a converting constructor. */
15365 : 90152362 : if (explicitp == 2)
15366 : 5226516 : DECL_NONCONVERTING_P (decl) = 1;
15367 : :
15368 : 90152362 : if (declspecs->explicit_specifier)
15369 : 130796 : store_explicit_specifier (decl, declspecs->explicit_specifier);
15370 : : }
15371 : 26114559 : else if (!staticp
15372 : 26114559 : && ((current_class_type
15373 : 16403318 : && same_type_p (TYPE_MAIN_VARIANT (type),
15374 : : current_class_type))
15375 : 16403222 : || (!dependent_type_p (type)
15376 : 10143536 : && !COMPLETE_TYPE_P (complete_type (type))
15377 : 1437 : && (!complete_or_array_type_p (type)
15378 : 1368 : || initialized == SD_UNINITIALIZED))))
15379 : : {
15380 : 1500 : if (TREE_CODE (type) != ARRAY_TYPE
15381 : 1500 : || !COMPLETE_TYPE_P (TREE_TYPE (type)))
15382 : : {
15383 : 165 : if (unqualified_id)
15384 : : {
15385 : 120 : auto_diagnostic_group d;
15386 : 120 : error_at (id_loc, "field %qD has incomplete type %qT",
15387 : : unqualified_id, type);
15388 : 120 : cxx_incomplete_type_inform (strip_array_types (type));
15389 : 120 : }
15390 : : else
15391 : 45 : error ("name %qT has incomplete type", type);
15392 : :
15393 : 165 : type = error_mark_node;
15394 : 165 : decl = NULL_TREE;
15395 : : }
15396 : : }
15397 : 42514865 : else if (!verify_type_context (input_location,
15398 : : staticp
15399 : : ? TCTX_STATIC_STORAGE
15400 : : : TCTX_FIELD, type))
15401 : : {
15402 : 0 : type = error_mark_node;
15403 : 0 : decl = NULL_TREE;
15404 : : }
15405 : : else
15406 : : {
15407 : 26113053 : if (friendp)
15408 : : {
15409 : 14 : if (unqualified_id)
15410 : 11 : error_at (id_loc,
15411 : : "%qE is neither function nor member function; "
15412 : : "cannot be declared friend", unqualified_id);
15413 : : else
15414 : 3 : error ("unnamed field is neither function nor member "
15415 : : "function; cannot be declared friend");
15416 : 14 : return error_mark_node;
15417 : : }
15418 : 26113039 : decl = NULL_TREE;
15419 : : }
15420 : :
15421 : 116266920 : if (friendp)
15422 : : {
15423 : : /* Packages tend to use GNU attributes on friends, so we only
15424 : : warn for standard attributes. */
15425 : 3717936 : if (attrlist
15426 : 3717936 : && !funcdef_flag
15427 : 1156464 : && cxx11_attribute_p (*attrlist)
15428 : 3717965 : && !all_attributes_are_contracts_p (*attrlist))
15429 : : {
15430 : 27 : *attrlist = NULL_TREE;
15431 : 27 : auto_diagnostic_group d;
15432 : 27 : if (warning_at (id_loc, OPT_Wattributes, "attribute ignored"))
15433 : 27 : inform (id_loc, "an attribute that appertains to a friend "
15434 : : "declaration that is not a definition is ignored");
15435 : 27 : }
15436 : : /* Friends are treated specially. */
15437 : 3717936 : if (ctype == current_class_type)
15438 : : ; /* We already issued a permerror. */
15439 : 3717936 : else if (decl && DECL_NAME (decl))
15440 : : {
15441 : 3717933 : set_originating_module (decl, true);
15442 : :
15443 : 3717933 : if (initialized)
15444 : : /* Kludge: We need funcdef_flag to be true in do_friend for
15445 : : in-class defaulted functions, but that breaks grokfndecl.
15446 : : So set it here. */
15447 : 50448 : funcdef_flag = true;
15448 : :
15449 : 3717933 : cplus_decl_attributes (&decl, *attrlist, 0);
15450 : 3717933 : *attrlist = NULL_TREE;
15451 : :
15452 : 3717933 : tree scope = ctype ? ctype : in_namespace;
15453 : 3717933 : decl = do_friend (scope, unqualified_id, decl,
15454 : : flags, funcdef_flag);
15455 : 3717933 : return decl;
15456 : : }
15457 : : else
15458 : 3 : return error_mark_node;
15459 : : }
15460 : :
15461 : : /* Structure field. It may not be a function, except for C++. */
15462 : :
15463 : 112548984 : if (decl == NULL_TREE)
15464 : : {
15465 : 26114555 : if (staticp)
15466 : : {
15467 : : /* C++ allows static class members. All other work
15468 : : for this is done by grokfield. */
15469 : 9711241 : decl = build_lang_decl_loc (id_loc, VAR_DECL,
15470 : : dname, type);
15471 : 9711241 : if (unqualified_id
15472 : 9711238 : && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
15473 : : {
15474 : 79850 : decl = check_explicit_specialization (unqualified_id, decl,
15475 : : template_count,
15476 : : concept_p * 8);
15477 : 79850 : if (decl == error_mark_node)
15478 : : return error_mark_node;
15479 : : }
15480 : 9711241 : set_linkage_for_static_data_member (decl);
15481 : 9711241 : if (concept_p)
15482 : 15 : error_at (declspecs->locations[ds_concept],
15483 : : "static data member %qE declared %qs",
15484 : : unqualified_id, "concept");
15485 : 9711226 : else if (constexpr_p && !initialized)
15486 : : {
15487 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
15488 : : "%<constexpr%> static data member %qD must "
15489 : : "have an initializer", decl);
15490 : 9 : constexpr_p = false;
15491 : : }
15492 : 9711241 : if (consteval_p)
15493 : 3 : error_at (declspecs->locations[ds_consteval],
15494 : : "static data member %qE declared %qs",
15495 : : unqualified_id, "consteval");
15496 : :
15497 : 9711241 : if (inlinep)
15498 : 7945 : mark_inline_variable (decl, declspecs->locations[ds_inline]);
15499 : :
15500 : 9711241 : if (!DECL_VAR_DECLARED_INLINE_P (decl)
15501 : 9711241 : && !(cxx_dialect >= cxx17 && constexpr_p))
15502 : : /* Even if there is an in-class initialization, DECL
15503 : : is considered undefined until an out-of-class
15504 : : definition is provided, unless this is an inline
15505 : : variable. */
15506 : 1665085 : DECL_EXTERNAL (decl) = 1;
15507 : :
15508 : 9711241 : if (thread_p)
15509 : : {
15510 : 393 : CP_DECL_THREAD_LOCAL_P (decl) = true;
15511 : 393 : if (!processing_template_decl)
15512 : 365 : set_decl_tls_model (decl, decl_default_tls_model (decl));
15513 : 393 : if (declspecs->gnu_thread_keyword_p)
15514 : 31 : SET_DECL_GNU_TLS_P (decl);
15515 : : }
15516 : :
15517 : : /* Set the constraints on the declaration. */
15518 : 9711241 : bool memtmpl = (current_template_depth
15519 : 9711241 : > template_class_depth (current_class_type));
15520 : 9711241 : if (memtmpl)
15521 : : {
15522 : 288781 : tree ci = current_template_constraints ();
15523 : 288781 : set_constraints (decl, ci);
15524 : : }
15525 : : }
15526 : : else
15527 : : {
15528 : 16403314 : if (concept_p)
15529 : : {
15530 : 12 : error_at (declspecs->locations[ds_concept],
15531 : : "non-static data member %qE declared %qs",
15532 : : unqualified_id, "concept");
15533 : 12 : concept_p = false;
15534 : 12 : constexpr_p = false;
15535 : : }
15536 : 16403302 : else if (constexpr_p)
15537 : : {
15538 : 9 : error_at (declspecs->locations[ds_constexpr],
15539 : : "non-static data member %qE declared %qs",
15540 : : unqualified_id, "constexpr");
15541 : 9 : constexpr_p = false;
15542 : : }
15543 : 16403314 : if (constinit_p)
15544 : : {
15545 : 6 : error_at (declspecs->locations[ds_constinit],
15546 : : "non-static data member %qE declared %qs",
15547 : : unqualified_id, "constinit");
15548 : 6 : constinit_p = false;
15549 : : }
15550 : 16403314 : if (consteval_p)
15551 : : {
15552 : 3 : error_at (declspecs->locations[ds_consteval],
15553 : : "non-static data member %qE declared %qs",
15554 : : unqualified_id, "consteval");
15555 : 3 : consteval_p = false;
15556 : : }
15557 : 16403314 : decl = build_decl (id_loc, FIELD_DECL, unqualified_id, type);
15558 : 16403314 : DECL_NONADDRESSABLE_P (decl) = bitfield;
15559 : 16403314 : if (bitfield && !unqualified_id)
15560 : 131366 : DECL_PADDING_P (decl) = 1;
15561 : :
15562 : 16403314 : if (storage_class == sc_mutable)
15563 : : {
15564 : 141519 : DECL_MUTABLE_P (decl) = 1;
15565 : 141519 : storage_class = sc_none;
15566 : : }
15567 : :
15568 : 16403314 : if (initialized)
15569 : : {
15570 : : /* An attempt is being made to initialize a non-static
15571 : : member. This is new in C++11. */
15572 : 1073283 : maybe_warn_cpp0x (CPP0X_NSDMI, init_loc);
15573 : :
15574 : : /* If this has been parsed with static storage class, but
15575 : : errors forced staticp to be cleared, ensure NSDMI is
15576 : : not present. */
15577 : 1073283 : if (declspecs->storage_class == sc_static)
15578 : 3 : DECL_INITIAL (decl) = error_mark_node;
15579 : : }
15580 : : }
15581 : :
15582 : 42517869 : bad_specifiers (decl, BSP_FIELD, virtualp,
15583 : : memfn_quals != TYPE_UNQUALIFIED,
15584 : : staticp ? false : inlinep, friendp,
15585 : : raises != NULL_TREE,
15586 : : declspecs->locations);
15587 : : }
15588 : : }
15589 : 129439205 : else if (FUNC_OR_METHOD_TYPE_P (type))
15590 : : {
15591 : 75375880 : tree original_name;
15592 : 75375880 : int publicp = 0;
15593 : :
15594 : 75375880 : if (!unqualified_id)
15595 : 0 : return error_mark_node;
15596 : :
15597 : 75375880 : if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
15598 : : original_name = dname;
15599 : : else
15600 : 74534201 : original_name = unqualified_id;
15601 : : // FIXME:gcc_assert (original_name == dname);
15602 : :
15603 : 75375880 : if (storage_class == sc_auto)
15604 : 1 : error_at (declspecs->locations[ds_storage_class],
15605 : : "storage class %<auto%> invalid for function %qs", name);
15606 : 75375879 : else if (storage_class == sc_register)
15607 : 7 : error_at (declspecs->locations[ds_storage_class],
15608 : : "storage class %<register%> invalid for function %qs",
15609 : : name);
15610 : 75375872 : else if (thread_p)
15611 : : {
15612 : 12 : if (declspecs->gnu_thread_keyword_p)
15613 : 12 : error_at (declspecs->locations[ds_thread],
15614 : : "storage class %<__thread%> invalid for function %qs",
15615 : : name);
15616 : : else
15617 : 0 : error_at (declspecs->locations[ds_thread],
15618 : : "storage class %<thread_local%> invalid for "
15619 : : "function %qs", name);
15620 : : }
15621 : 75375860 : else if (constinit_p)
15622 : 3 : error_at (declspecs->locations[ds_constinit],
15623 : : "%<constinit%> specifier invalid for function %qs", name);
15624 : :
15625 : 75375880 : if (virt_specifiers)
15626 : 6 : error ("virt-specifiers in %qs not allowed outside a class "
15627 : : "definition", name);
15628 : : /* Function declaration not at top level.
15629 : : Storage classes other than `extern' are not allowed
15630 : : and `extern' makes no difference. */
15631 : 75375880 : if (! toplevel_bindings_p ()
15632 : 34928 : && (storage_class == sc_static
15633 : 34919 : || decl_spec_seq_has_spec_p (declspecs, ds_inline))
15634 : 75375892 : && pedantic)
15635 : : {
15636 : 9 : if (storage_class == sc_static)
15637 : 6 : pedwarn (declspecs->locations[ds_storage_class], OPT_Wpedantic,
15638 : : "%<static%> specifier invalid for function %qs "
15639 : : "declared out of global scope", name);
15640 : : else
15641 : 3 : pedwarn (declspecs->locations[ds_inline], OPT_Wpedantic,
15642 : : "%<inline%> specifier invalid for function %qs "
15643 : : "declared out of global scope", name);
15644 : : }
15645 : :
15646 : 75375880 : if (ctype == NULL_TREE)
15647 : : {
15648 : 66486331 : if (virtualp)
15649 : : {
15650 : 0 : error ("virtual non-class function %qs", name);
15651 : 0 : virtualp = 0;
15652 : : }
15653 : 66486331 : else if (sfk == sfk_constructor
15654 : 66486331 : || sfk == sfk_destructor)
15655 : : {
15656 : 3 : error (funcdef_flag
15657 : : ? G_("%qs defined in a non-class scope")
15658 : : : G_("%qs declared in a non-class scope"), name);
15659 : 3 : sfk = sfk_none;
15660 : : }
15661 : : }
15662 : 75375880 : if (consteval_p
15663 : 75407407 : && identifier_p (unqualified_id)
15664 : 75407407 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
15665 : : {
15666 : 9 : error_at (declspecs->locations[ds_consteval],
15667 : : "%qD cannot be %qs", unqualified_id, "consteval");
15668 : 9 : consteval_p = false;
15669 : : }
15670 : :
15671 : : /* Record whether the function is public. */
15672 : 75375880 : publicp = (ctype != NULL_TREE
15673 : 75375880 : || storage_class != sc_static);
15674 : :
15675 : 150751760 : decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
15676 : : declspecs,
15677 : : reqs, virtualp, flags, memfn_quals, rqual, raises,
15678 : : 1, friendp,
15679 : : publicp,
15680 : 75375880 : inlinep | (2 * constexpr_p) | (4 * concept_p)
15681 : 75375880 : | (8 * consteval_p),
15682 : : initialized == SD_DELETED,
15683 : : is_xobj_member_function, sfk,
15684 : : funcdef_flag,
15685 : : late_return_type_p,
15686 : : template_count, in_namespace, attrlist,
15687 : : id_loc);
15688 : 75375880 : if (decl == NULL_TREE)
15689 : 506 : return error_mark_node;
15690 : :
15691 : 75375374 : if (explicitp == 2)
15692 : 3510 : DECL_NONCONVERTING_P (decl) = 1;
15693 : 75375374 : if (staticp == 1)
15694 : : {
15695 : 105090 : int invalid_static = 0;
15696 : :
15697 : : /* Don't allow a static member function in a class, and forbid
15698 : : declaring main to be static. */
15699 : 105090 : if (TREE_CODE (type) == METHOD_TYPE)
15700 : : {
15701 : 0 : permerror (input_location, "cannot declare member function %qD to have "
15702 : : "static linkage", decl);
15703 : 0 : invalid_static = 1;
15704 : : }
15705 : 105090 : else if (current_function_decl)
15706 : : {
15707 : : /* 7.1.1: There can be no static function declarations within a
15708 : : block. */
15709 : 9 : error_at (declspecs->locations[ds_storage_class],
15710 : : "cannot declare static function inside another function");
15711 : 9 : invalid_static = 1;
15712 : : }
15713 : :
15714 : 9 : if (invalid_static)
15715 : : {
15716 : 75375374 : staticp = 0;
15717 : : storage_class = sc_none;
15718 : : }
15719 : : }
15720 : 75375374 : if (declspecs->explicit_specifier)
15721 : 3 : store_explicit_specifier (decl, declspecs->explicit_specifier);
15722 : : }
15723 : : else
15724 : : {
15725 : : /* It's a variable. */
15726 : :
15727 : : /* An uninitialized decl with `extern' is a reference. */
15728 : 107754984 : decl = grokvardecl (type, dname, unqualified_id,
15729 : : declspecs,
15730 : : initialized,
15731 : : type_quals,
15732 : : inlinep,
15733 : : concept_p,
15734 : : template_count,
15735 : : ctype ? ctype : in_namespace,
15736 : : id_loc);
15737 : 54063325 : if (decl == NULL_TREE)
15738 : 49 : return error_mark_node;
15739 : :
15740 : 54063276 : bad_specifiers (decl, BSP_VAR, virtualp,
15741 : : memfn_quals != TYPE_UNQUALIFIED,
15742 : : inlinep, friendp, raises != NULL_TREE,
15743 : : declspecs->locations);
15744 : :
15745 : 54063276 : if (ctype)
15746 : : {
15747 : 371660 : DECL_CONTEXT (decl) = ctype;
15748 : 371660 : if (staticp == 1)
15749 : : {
15750 : 6 : permerror (declspecs->locations[ds_storage_class],
15751 : : "%<static%> may not be used when defining "
15752 : : "(as opposed to declaring) a static data member");
15753 : 6 : staticp = 0;
15754 : 6 : storage_class = sc_none;
15755 : : }
15756 : 371660 : if (storage_class == sc_register && TREE_STATIC (decl))
15757 : : {
15758 : 0 : error ("static member %qD declared %<register%>", decl);
15759 : 0 : storage_class = sc_none;
15760 : : }
15761 : 371660 : if (storage_class == sc_extern && pedantic)
15762 : : {
15763 : 0 : pedwarn (input_location, OPT_Wpedantic,
15764 : : "cannot explicitly declare member %q#D to have "
15765 : : "extern linkage", decl);
15766 : 0 : storage_class = sc_none;
15767 : : }
15768 : : }
15769 : 53691616 : else if (constexpr_p && DECL_EXTERNAL (decl))
15770 : : {
15771 : 12 : error_at (DECL_SOURCE_LOCATION (decl),
15772 : : "declaration of %<constexpr%> variable %qD "
15773 : : "is not a definition", decl);
15774 : 12 : constexpr_p = false;
15775 : : }
15776 : 54063276 : if (consteval_p)
15777 : : {
15778 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
15779 : : "a variable cannot be declared %<consteval%>");
15780 : 3 : consteval_p = false;
15781 : : }
15782 : :
15783 : 54063276 : if (inlinep)
15784 : 3753561 : mark_inline_variable (decl, declspecs->locations[ds_inline]);
15785 : 54063276 : if (innermost_code == cdk_decomp)
15786 : : {
15787 : 74948 : gcc_assert (declarator && declarator->kind == cdk_decomp);
15788 : 74948 : DECL_SOURCE_LOCATION (decl) = id_loc;
15789 : 74948 : DECL_ARTIFICIAL (decl) = 1;
15790 : 74948 : fit_decomposition_lang_decl (decl, NULL_TREE);
15791 : : }
15792 : : }
15793 : :
15794 : 506913669 : if (VAR_P (decl) && !initialized)
15795 : 6603319 : if (tree auto_node = type_uses_auto (type))
15796 : 94 : if (!CLASS_PLACEHOLDER_TEMPLATE (auto_node))
15797 : : {
15798 : 18 : location_t loc = declspecs->locations[ds_type_spec];
15799 : 18 : error_at (loc, "declaration of %q#D has no initializer", decl);
15800 : 18 : TREE_TYPE (decl) = error_mark_node;
15801 : : }
15802 : :
15803 : 506913669 : if (storage_class == sc_extern && initialized && !funcdef_flag)
15804 : : {
15805 : 241 : if (toplevel_bindings_p ())
15806 : : {
15807 : : /* It's common practice (and completely valid) to have a const
15808 : : be initialized and declared extern. */
15809 : 235 : if (!(type_quals & TYPE_QUAL_CONST))
15810 : 20 : warning_at (DECL_SOURCE_LOCATION (decl), 0,
15811 : : "%qs initialized and declared %<extern%>", name);
15812 : : }
15813 : : else
15814 : : {
15815 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
15816 : : "%qs has both %<extern%> and initializer", name);
15817 : 6 : return error_mark_node;
15818 : : }
15819 : : }
15820 : :
15821 : : /* Record `register' declaration for warnings on &
15822 : : and in case doing stupid register allocation. */
15823 : :
15824 : 506913663 : if (storage_class == sc_register)
15825 : : {
15826 : 2042 : DECL_REGISTER (decl) = 1;
15827 : : /* Warn about register storage specifiers on PARM_DECLs. */
15828 : 2042 : if (TREE_CODE (decl) == PARM_DECL)
15829 : : {
15830 : 35 : if (cxx_dialect >= cxx17)
15831 : 22 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
15832 : : "ISO C++17 does not allow %<register%> storage "
15833 : : "class specifier");
15834 : : else
15835 : 13 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
15836 : : "%<register%> storage class specifier used");
15837 : : }
15838 : : }
15839 : 506911621 : else if (storage_class == sc_extern)
15840 : 29421520 : DECL_THIS_EXTERN (decl) = 1;
15841 : 477490101 : else if (storage_class == sc_static)
15842 : 18122393 : DECL_THIS_STATIC (decl) = 1;
15843 : :
15844 : 506913663 : if (VAR_P (decl))
15845 : : {
15846 : : /* Set constexpr flag on vars (functions got it in grokfndecl). */
15847 : 63774511 : if (constexpr_p)
15848 : 12668485 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
15849 : : /* And the constinit flag (which only applies to variables). */
15850 : 51106026 : else if (constinit_p)
15851 : 359 : DECL_DECLARED_CONSTINIT_P (decl) = true;
15852 : : }
15853 : 443139152 : else if (TREE_CODE (decl) == FUNCTION_DECL)
15854 : : {
15855 : : /* If we saw a return type, record its location. */
15856 : 161809803 : location_t loc = declspecs->locations[ds_type_spec];
15857 : 161809803 : if (loc == UNKNOWN_LOCATION)
15858 : : /* Build DECL_RESULT in start_preparsed_function. */;
15859 : 133853754 : else if (!DECL_RESULT (decl))
15860 : : {
15861 : 133818743 : tree restype = TREE_TYPE (TREE_TYPE (decl));
15862 : 133818743 : tree resdecl = build_decl (loc, RESULT_DECL, 0, restype);
15863 : 133818743 : DECL_ARTIFICIAL (resdecl) = 1;
15864 : 133818743 : DECL_IGNORED_P (resdecl) = 1;
15865 : 133818743 : DECL_RESULT (decl) = resdecl;
15866 : : }
15867 : 35011 : else if (funcdef_flag)
15868 : 3 : DECL_SOURCE_LOCATION (DECL_RESULT (decl)) = loc;
15869 : : }
15870 : :
15871 : : /* Record constancy and volatility on the DECL itself . There's
15872 : : no need to do this when processing a template; we'll do this
15873 : : for the instantiated declaration based on the type of DECL. */
15874 : 506913663 : if (!processing_template_decl
15875 : : /* Don't do it for instantiated variable templates either,
15876 : : cp_apply_type_quals_to_decl should have been called on it
15877 : : already and might have been overridden in cp_finish_decl
15878 : : if initializer needs runtime initialization. */
15879 : 506913663 : && (!VAR_P (decl) || !DECL_TEMPLATE_INSTANTIATED (decl)))
15880 : 171076744 : cp_apply_type_quals_to_decl (type_quals, decl);
15881 : :
15882 : 506913663 : return decl;
15883 : : }
15884 : 880224942 : }
15885 : :
15886 : : /* Subroutine of start_function. Ensure that each of the parameter
15887 : : types (as listed in PARMS) is complete, as is required for a
15888 : : function definition. */
15889 : :
15890 : : static void
15891 : 136360309 : require_complete_types_for_parms (tree parms)
15892 : : {
15893 : 405070945 : for (; parms; parms = DECL_CHAIN (parms))
15894 : : {
15895 : 268710636 : if (dependent_type_p (TREE_TYPE (parms)))
15896 : 155627995 : continue;
15897 : 113082641 : if (!VOID_TYPE_P (TREE_TYPE (parms))
15898 : 113082641 : && complete_type_or_else (TREE_TYPE (parms), parms))
15899 : : {
15900 : 113082560 : relayout_decl (parms);
15901 : 113082560 : DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
15902 : :
15903 : 113082560 : abstract_virtuals_error (parms, TREE_TYPE (parms));
15904 : 113082560 : maybe_warn_parm_abi (TREE_TYPE (parms),
15905 : 113082560 : DECL_SOURCE_LOCATION (parms));
15906 : : }
15907 : : else
15908 : : /* grokparms or complete_type_or_else will have already issued
15909 : : an error. */
15910 : 81 : TREE_TYPE (parms) = error_mark_node;
15911 : : }
15912 : 136360309 : }
15913 : :
15914 : : /* Returns nonzero if T is a local variable. */
15915 : :
15916 : : int
15917 : 142926559 : local_variable_p (const_tree t)
15918 : : {
15919 : 142926559 : if ((VAR_P (t)
15920 : 64765405 : && (DECL_LOCAL_DECL_P (t)
15921 : 64765405 : || !DECL_CONTEXT (t)
15922 : 64724008 : || TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL))
15923 : 146466660 : || (TREE_CODE (t) == PARM_DECL))
15924 : 127910744 : return 1;
15925 : :
15926 : : return 0;
15927 : : }
15928 : :
15929 : : /* Like local_variable_p, but suitable for use as a tree-walking
15930 : : function. */
15931 : :
15932 : : static tree
15933 : 4840753 : local_variable_p_walkfn (tree *tp, int *walk_subtrees,
15934 : : void * /*data*/)
15935 : : {
15936 : 4840753 : if (unevaluated_p (TREE_CODE (*tp)))
15937 : : {
15938 : : /* DR 2082 permits local variables in unevaluated contexts
15939 : : within a default argument. */
15940 : 15 : *walk_subtrees = 0;
15941 : 15 : return NULL_TREE;
15942 : : }
15943 : :
15944 : 4840738 : if (local_variable_p (*tp)
15945 : 4840738 : && (!DECL_ARTIFICIAL (*tp) || DECL_NAME (*tp) == this_identifier))
15946 : : return *tp;
15947 : 4840738 : else if (TYPE_P (*tp))
15948 : 30 : *walk_subtrees = 0;
15949 : :
15950 : : return NULL_TREE;
15951 : : }
15952 : :
15953 : : /* Check that ARG, which is a default-argument expression for a
15954 : : parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
15955 : : something goes wrong. DECL may also be a _TYPE node, rather than a
15956 : : DECL, if there is no DECL available. */
15957 : :
15958 : : tree
15959 : 2469833 : check_default_argument (tree decl, tree arg, tsubst_flags_t complain)
15960 : : {
15961 : 2469833 : tree var;
15962 : 2469833 : tree decl_type;
15963 : :
15964 : 2469833 : if (TREE_CODE (arg) == DEFERRED_PARSE)
15965 : : /* We get a DEFERRED_PARSE when looking at an in-class declaration
15966 : : with a default argument. Ignore the argument for now; we'll
15967 : : deal with it after the class is complete. */
15968 : : return arg;
15969 : :
15970 : 1778291 : if (TYPE_P (decl))
15971 : : {
15972 : : decl_type = decl;
15973 : : decl = NULL_TREE;
15974 : : }
15975 : : else
15976 : 539043 : decl_type = TREE_TYPE (decl);
15977 : :
15978 : 1778291 : if (arg == error_mark_node
15979 : 1778180 : || decl == error_mark_node
15980 : 1778171 : || TREE_TYPE (arg) == error_mark_node
15981 : 3556462 : || decl_type == error_mark_node)
15982 : : /* Something already went wrong. There's no need to check
15983 : : further. */
15984 : : return error_mark_node;
15985 : :
15986 : : /* [dcl.fct.default]
15987 : :
15988 : : A default argument expression is implicitly converted to the
15989 : : parameter type. */
15990 : 1778171 : ++cp_unevaluated_operand;
15991 : : /* Avoid digest_init clobbering the initializer. */
15992 : 1778171 : tree carg = BRACE_ENCLOSED_INITIALIZER_P (arg) ? unshare_expr (arg): arg;
15993 : 1778171 : perform_implicit_conversion_flags (decl_type, carg, complain,
15994 : : LOOKUP_IMPLICIT);
15995 : 1778171 : --cp_unevaluated_operand;
15996 : :
15997 : : /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
15998 : : the call sites. */
15999 : 1320329 : if (TYPE_PTR_OR_PTRMEM_P (decl_type)
16000 : 457857 : && null_ptr_cst_p (arg)
16001 : : /* Don't lose side-effects as in PR90473. */
16002 : 2125447 : && !TREE_SIDE_EFFECTS (arg))
16003 : 347273 : return nullptr_node;
16004 : :
16005 : : /* [dcl.fct.default]
16006 : :
16007 : : Local variables shall not be used in default argument
16008 : : expressions.
16009 : :
16010 : : The keyword `this' shall not be used in a default argument of a
16011 : : member function. */
16012 : 1430898 : var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
16013 : 1430898 : if (var)
16014 : : {
16015 : 0 : if (complain & tf_warning_or_error)
16016 : : {
16017 : 0 : if (DECL_NAME (var) == this_identifier)
16018 : 0 : permerror (input_location, "default argument %qE uses %qD",
16019 : : arg, var);
16020 : : else
16021 : 0 : error ("default argument %qE uses local variable %qD", arg, var);
16022 : : }
16023 : 0 : return error_mark_node;
16024 : : }
16025 : :
16026 : : /* All is well. */
16027 : 1430898 : return arg;
16028 : : }
16029 : :
16030 : : /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
16031 : :
16032 : : static tree
16033 : 251936105 : type_is_deprecated (tree type)
16034 : : {
16035 : 372764309 : enum tree_code code;
16036 : 372764309 : if (TREE_DEPRECATED (type))
16037 : : return type;
16038 : 372723632 : if (TYPE_NAME (type))
16039 : : {
16040 : 247841869 : if (TREE_DEPRECATED (TYPE_NAME (type)))
16041 : : return type;
16042 : : else
16043 : : {
16044 : 247841863 : cp_warn_deprecated_use_scopes (CP_DECL_CONTEXT (TYPE_NAME (type)));
16045 : 247841863 : return NULL_TREE;
16046 : : }
16047 : : }
16048 : :
16049 : : /* Do warn about using typedefs to a deprecated class. */
16050 : 124881763 : if (OVERLOAD_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
16051 : 0 : return type_is_deprecated (TYPE_MAIN_VARIANT (type));
16052 : :
16053 : 124881763 : code = TREE_CODE (type);
16054 : :
16055 : 124881763 : if (code == POINTER_TYPE || code == REFERENCE_TYPE
16056 : 124881763 : || code == OFFSET_TYPE || code == FUNCTION_TYPE
16057 : : || code == METHOD_TYPE || code == ARRAY_TYPE)
16058 : 120722257 : return type_is_deprecated (TREE_TYPE (type));
16059 : :
16060 : 105947 : if (TYPE_PTRMEMFUNC_P (type))
16061 : 105947 : return type_is_deprecated
16062 : 105947 : (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
16063 : :
16064 : : return NULL_TREE;
16065 : : }
16066 : :
16067 : : /* Returns an unavailable type used within TYPE, or NULL_TREE if none. */
16068 : :
16069 : : static tree
16070 : 252781627 : type_is_unavailable (tree type)
16071 : : {
16072 : 374121940 : enum tree_code code;
16073 : 374121940 : if (TREE_UNAVAILABLE (type))
16074 : : return type;
16075 : 374121934 : if (TYPE_NAME (type))
16076 : : {
16077 : 248698666 : if (TREE_UNAVAILABLE (TYPE_NAME (type)))
16078 : : return type;
16079 : : else
16080 : : {
16081 : 248698660 : cp_warn_deprecated_use_scopes (CP_DECL_CONTEXT (TYPE_NAME (type)));
16082 : 248698660 : return NULL_TREE;
16083 : : }
16084 : : }
16085 : :
16086 : : /* Do warn about using typedefs to a deprecated class. */
16087 : 125423268 : if (OVERLOAD_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
16088 : 0 : return type_is_deprecated (TYPE_MAIN_VARIANT (type));
16089 : :
16090 : 125423268 : code = TREE_CODE (type);
16091 : :
16092 : 125423268 : if (code == POINTER_TYPE || code == REFERENCE_TYPE
16093 : 125423268 : || code == OFFSET_TYPE || code == FUNCTION_TYPE
16094 : : || code == METHOD_TYPE || code == ARRAY_TYPE)
16095 : 121133710 : return type_is_unavailable (TREE_TYPE (type));
16096 : :
16097 : 206603 : if (TYPE_PTRMEMFUNC_P (type))
16098 : 206603 : return type_is_unavailable
16099 : 206603 : (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
16100 : :
16101 : : return NULL_TREE;
16102 : : }
16103 : :
16104 : : /* Decode the list of parameter types for a function type.
16105 : : Given the list of things declared inside the parens,
16106 : : return a list of types.
16107 : :
16108 : : If this parameter does not end with an ellipsis, we append
16109 : : void_list_node.
16110 : :
16111 : : *PARMS is set to the chain of PARM_DECLs created. */
16112 : :
16113 : : tree
16114 : 168693907 : grokparms (tree parmlist, tree *parms)
16115 : : {
16116 : 168693907 : tree result = NULL_TREE;
16117 : 168693907 : tree decls = NULL_TREE;
16118 : 168693907 : tree parm;
16119 : 168693907 : int any_error = 0;
16120 : :
16121 : 422065244 : for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
16122 : : {
16123 : 420698304 : tree type = NULL_TREE;
16124 : 420698304 : tree init = TREE_PURPOSE (parm);
16125 : 420698304 : tree decl = TREE_VALUE (parm);
16126 : :
16127 : 420698304 : if (parm == void_list_node || parm == explicit_void_list_node)
16128 : : break;
16129 : :
16130 : 253371349 : if (! decl || TREE_TYPE (decl) == error_mark_node)
16131 : : {
16132 : 185 : any_error = 1;
16133 : 185 : continue;
16134 : : }
16135 : :
16136 : 253371164 : type = TREE_TYPE (decl);
16137 : 253371164 : if (VOID_TYPE_P (type))
16138 : : {
16139 : 78 : if (same_type_p (type, void_type_node)
16140 : 69 : && !init
16141 : 57 : && !DECL_NAME (decl) && !result
16142 : 102 : && TREE_CHAIN (parm) == void_list_node)
16143 : : /* DR 577: A parameter list consisting of a single
16144 : : unnamed parameter of non-dependent type 'void'. */
16145 : : break;
16146 : 66 : else if (cv_qualified_p (type))
16147 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
16148 : : "invalid use of cv-qualified type %qT in "
16149 : : "parameter declaration", type);
16150 : : else
16151 : 57 : error_at (DECL_SOURCE_LOCATION (decl),
16152 : : "invalid use of type %<void%> in parameter "
16153 : : "declaration");
16154 : : /* It's not a good idea to actually create parameters of
16155 : : type `void'; other parts of the compiler assume that a
16156 : : void type terminates the parameter list. */
16157 : 66 : type = error_mark_node;
16158 : 66 : TREE_TYPE (decl) = error_mark_node;
16159 : : }
16160 : :
16161 : 253371152 : if (type != error_mark_node)
16162 : : {
16163 : 253371086 : if (deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
16164 : : {
16165 : 252781627 : tree unavailtype = type_is_unavailable (type);
16166 : 252781627 : if (unavailtype)
16167 : 12 : cp_handle_deprecated_or_unavailable (unavailtype);
16168 : : }
16169 : 253371086 : if (deprecated_state != DEPRECATED_SUPPRESS
16170 : 253371086 : && deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
16171 : : {
16172 : 251936105 : tree deptype = type_is_deprecated (type);
16173 : 251936105 : if (deptype)
16174 : 40683 : cp_handle_deprecated_or_unavailable (deptype);
16175 : : }
16176 : :
16177 : : /* [dcl.fct] "A parameter with volatile-qualified type is
16178 : : deprecated." */
16179 : 253371086 : if (CP_TYPE_VOLATILE_P (type))
16180 : 504 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wvolatile,
16181 : : "%<volatile%>-qualified parameter is "
16182 : : "deprecated");
16183 : :
16184 : : /* Top-level qualifiers on the parameters are
16185 : : ignored for function types. */
16186 : 253371086 : type = cp_build_qualified_type (type, 0);
16187 : 253371086 : if (TREE_CODE (type) == METHOD_TYPE)
16188 : : {
16189 : 0 : error ("parameter %qD invalidly declared method type", decl);
16190 : 0 : type = build_pointer_type (type);
16191 : 0 : TREE_TYPE (decl) = type;
16192 : : }
16193 : 253371086 : else if (cxx_dialect < cxx17 && INDIRECT_TYPE_P (type))
16194 : : {
16195 : : /* Before C++17 DR 393:
16196 : : [dcl.fct]/6, parameter types cannot contain pointers
16197 : : (references) to arrays of unknown bound. */
16198 : 1533171 : tree t = TREE_TYPE (type);
16199 : 1533171 : int ptr = TYPE_PTR_P (type);
16200 : :
16201 : 1683771 : while (1)
16202 : : {
16203 : 1608471 : if (TYPE_PTR_P (t))
16204 : : ptr = 1;
16205 : 1536234 : else if (TREE_CODE (t) != ARRAY_TYPE)
16206 : : break;
16207 : 3073 : else if (!TYPE_DOMAIN (t))
16208 : : break;
16209 : 75300 : t = TREE_TYPE (t);
16210 : : }
16211 : 1533171 : if (TREE_CODE (t) == ARRAY_TYPE)
16212 : 16 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wpedantic,
16213 : : ptr
16214 : : ? G_("parameter %qD includes pointer to array of "
16215 : : "unknown bound %qT")
16216 : : : G_("parameter %qD includes reference to array of "
16217 : : "unknown bound %qT"),
16218 : : decl, t);
16219 : : }
16220 : :
16221 : 253371086 : if (init && !processing_template_decl)
16222 : 1230576 : init = check_default_argument (decl, init, tf_warning_or_error);
16223 : : }
16224 : :
16225 : 253371152 : DECL_CHAIN (decl) = decls;
16226 : 253371152 : decls = decl;
16227 : 253371152 : result = tree_cons (init, type, result);
16228 : : }
16229 : 168693907 : decls = nreverse (decls);
16230 : 168693907 : result = nreverse (result);
16231 : 168693907 : if (parm)
16232 : 167326967 : result = chainon (result, void_list_node);
16233 : 168693907 : *parms = decls;
16234 : 168693907 : if (any_error)
16235 : 171 : result = NULL_TREE;
16236 : :
16237 : 171 : if (any_error)
16238 : : /* We had parm errors, recover by giving the function (...) type. */
16239 : 171 : result = NULL_TREE;
16240 : :
16241 : 168693907 : return result;
16242 : : }
16243 : :
16244 : :
16245 : : /* D is a constructor or overloaded `operator='.
16246 : :
16247 : : Let T be the class in which D is declared. Then, this function
16248 : : returns:
16249 : :
16250 : : -1 if D's is an ill-formed constructor or copy assignment operator
16251 : : whose first parameter is of type `T'.
16252 : : 0 if D is not a copy constructor or copy assignment
16253 : : operator.
16254 : : 1 if D is a copy constructor or copy assignment operator whose
16255 : : first parameter is a reference to non-const qualified T.
16256 : : 2 if D is a copy constructor or copy assignment operator whose
16257 : : first parameter is a reference to const qualified T.
16258 : :
16259 : : This function can be used as a predicate. Positive values indicate
16260 : : a copy constructor and nonzero values indicate a copy assignment
16261 : : operator. */
16262 : :
16263 : : int
16264 : 271813311 : copy_fn_p (const_tree d)
16265 : : {
16266 : 271813311 : tree args;
16267 : 271813311 : tree arg_type;
16268 : 271813311 : int result = 1;
16269 : :
16270 : 271813311 : gcc_assert (DECL_FUNCTION_MEMBER_P (d));
16271 : :
16272 : 271813311 : if (TREE_CODE (d) == TEMPLATE_DECL
16273 : 271813311 : || (DECL_TEMPLATE_INFO (d)
16274 : 130644408 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
16275 : : /* Instantiations of template member functions are never copy
16276 : : functions. Note that member functions of templated classes are
16277 : : represented as template functions internally, and we must
16278 : : accept those as copy functions. */
16279 : : return 0;
16280 : :
16281 : 229468057 : if (!DECL_CONSTRUCTOR_P (d)
16282 : 229468057 : && DECL_NAME (d) != assign_op_identifier)
16283 : : return 0;
16284 : :
16285 : 228727865 : if (DECL_XOBJ_MEMBER_FUNCTION_P (d))
16286 : : {
16287 : 154 : tree object_param = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (d)));
16288 : 154 : if (!TYPE_REF_P (object_param)
16289 : 148 : || TYPE_REF_IS_RVALUE (object_param)
16290 : : /* Reject unrelated object parameters. */
16291 : 136 : || TYPE_MAIN_VARIANT (TREE_TYPE (object_param)) != DECL_CONTEXT (d)
16292 : 290 : || CP_TYPE_CONST_P (TREE_TYPE (object_param)))
16293 : 24 : return 0;
16294 : 130 : args = TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (d)));
16295 : : }
16296 : : else
16297 : 228727711 : args = FUNCTION_FIRST_USER_PARMTYPE (d);
16298 : 228727841 : if (!args)
16299 : : return 0;
16300 : :
16301 : 228720395 : arg_type = TREE_VALUE (args);
16302 : 228720395 : if (arg_type == error_mark_node)
16303 : : return 0;
16304 : :
16305 : 228720360 : if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
16306 : : {
16307 : : /* Pass by value copy assignment operator. */
16308 : : result = -1;
16309 : : }
16310 : 228718460 : else if (TYPE_REF_P (arg_type)
16311 : 140785560 : && !TYPE_REF_IS_RVALUE (arg_type)
16312 : 319514039 : && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
16313 : : {
16314 : 71355404 : if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
16315 : 71296725 : result = 2;
16316 : : }
16317 : : else
16318 : : return 0;
16319 : :
16320 : 71357304 : args = TREE_CHAIN (args);
16321 : :
16322 : 73862333 : if (args && args != void_list_node && !TREE_PURPOSE (args))
16323 : : /* There are more non-optional args. */
16324 : : return 0;
16325 : :
16326 : : return result;
16327 : : }
16328 : :
16329 : : /* D is a constructor or overloaded `operator='.
16330 : :
16331 : : Let T be the class in which D is declared. Then, this function
16332 : : returns true when D is a move constructor or move assignment
16333 : : operator, false otherwise. */
16334 : :
16335 : : bool
16336 : 108623137 : move_fn_p (const_tree d)
16337 : : {
16338 : 108623137 : if (cxx_dialect == cxx98)
16339 : : /* There are no move constructors if we are in C++98 mode. */
16340 : : return false;
16341 : :
16342 : 108562342 : if (TREE_CODE (d) == TEMPLATE_DECL
16343 : 108562342 : || (DECL_TEMPLATE_INFO (d)
16344 : 49166768 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
16345 : : /* Instantiations of template member functions are never move
16346 : : functions. Note that member functions of templated classes are
16347 : : represented as template functions internally, and we must
16348 : : accept those as move functions. */
16349 : : return 0;
16350 : :
16351 : 90285846 : return move_signature_fn_p (d);
16352 : : }
16353 : :
16354 : : /* D is a constructor or overloaded `operator='.
16355 : :
16356 : : Then, this function returns true when D has the same signature as a move
16357 : : constructor or move assignment operator (because either it is such a
16358 : : ctor/op= or it is a template specialization with the same signature),
16359 : : false otherwise. */
16360 : :
16361 : : bool
16362 : 90285846 : move_signature_fn_p (const_tree d)
16363 : : {
16364 : 90285846 : tree args;
16365 : 90285846 : tree arg_type;
16366 : 90285846 : bool result = false;
16367 : :
16368 : 90285846 : if (!DECL_CONSTRUCTOR_P (d)
16369 : 90285846 : && DECL_NAME (d) != assign_op_identifier)
16370 : : return 0;
16371 : :
16372 : 90285789 : if (DECL_XOBJ_MEMBER_FUNCTION_P (d))
16373 : : {
16374 : 88 : tree object_param = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (d)));
16375 : 88 : if (!TYPE_REF_P (object_param)
16376 : 84 : || TYPE_REF_IS_RVALUE (object_param)
16377 : : /* Reject unrelated object parameters. */
16378 : 76 : || TYPE_MAIN_VARIANT (TREE_TYPE (object_param)) != DECL_CONTEXT (d)
16379 : 164 : || CP_TYPE_CONST_P (TREE_TYPE (object_param)))
16380 : 16 : return 0;
16381 : 72 : args = TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (d)));
16382 : : }
16383 : : else
16384 : 90285701 : args = FUNCTION_FIRST_USER_PARMTYPE (d);
16385 : 90285773 : if (!args)
16386 : : return 0;
16387 : :
16388 : 90283039 : arg_type = TREE_VALUE (args);
16389 : 90283039 : if (arg_type == error_mark_node)
16390 : : return 0;
16391 : :
16392 : 90283031 : if (TYPE_REF_P (arg_type)
16393 : 44337405 : && TYPE_REF_IS_RVALUE (arg_type)
16394 : 124833172 : && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
16395 : : DECL_CONTEXT (d)))
16396 : : result = true;
16397 : :
16398 : 90283031 : args = TREE_CHAIN (args);
16399 : :
16400 : 100267693 : if (args && args != void_list_node && !TREE_PURPOSE (args))
16401 : : /* There are more non-optional args. */
16402 : : return false;
16403 : :
16404 : : return result;
16405 : : }
16406 : :
16407 : : /* Remember any special properties of member function DECL. */
16408 : :
16409 : : void
16410 : 278783757 : grok_special_member_properties (tree decl)
16411 : : {
16412 : 278783757 : tree class_type;
16413 : :
16414 : 278783757 : if (TREE_CODE (decl) == USING_DECL
16415 : 278783757 : || !DECL_OBJECT_MEMBER_FUNCTION_P (decl))
16416 : : return;
16417 : :
16418 : 262122001 : class_type = DECL_CONTEXT (decl);
16419 : 262122001 : if (IDENTIFIER_CTOR_P (DECL_NAME (decl)))
16420 : : {
16421 : 115131173 : int ctor = copy_fn_p (decl);
16422 : :
16423 : 115131173 : if (!DECL_ARTIFICIAL (decl))
16424 : 86847069 : TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
16425 : :
16426 : 115131173 : if (ctor > 0)
16427 : : {
16428 : : /* [class.copy]
16429 : :
16430 : : A non-template constructor for class X is a copy
16431 : : constructor if its first parameter is of type X&, const
16432 : : X&, volatile X& or const volatile X&, and either there
16433 : : are no other parameters or else all other parameters have
16434 : : default arguments. */
16435 : 22489546 : TYPE_HAS_COPY_CTOR (class_type) = 1;
16436 : 22489546 : if (ctor > 1)
16437 : 22475750 : TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
16438 : : }
16439 : :
16440 : 115131173 : if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
16441 : 23919461 : TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
16442 : :
16443 : 115131173 : if (is_list_ctor (decl))
16444 : 1375555 : TYPE_HAS_LIST_CTOR (class_type) = 1;
16445 : :
16446 : 115131173 : if (maybe_constexpr_fn (decl)
16447 : 115131173 : && !ctor && !move_fn_p (decl))
16448 : 27566857 : TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
16449 : : }
16450 : 146990828 : else if (DECL_NAME (decl) == assign_op_identifier)
16451 : : {
16452 : : /* [class.copy]
16453 : :
16454 : : A non-template assignment operator for class X is a copy
16455 : : assignment operator if its parameter is of type X, X&, const
16456 : : X&, volatile X& or const volatile X&. */
16457 : :
16458 : 12667198 : int assop = copy_fn_p (decl);
16459 : :
16460 : 12667198 : if (assop)
16461 : : {
16462 : 6341523 : TYPE_HAS_COPY_ASSIGN (class_type) = 1;
16463 : 6341523 : if (assop != 1)
16464 : 6312468 : TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
16465 : : }
16466 : : }
16467 : 134323630 : else if (IDENTIFIER_CONV_OP_P (DECL_NAME (decl)))
16468 : 1863467 : TYPE_HAS_CONVERSION (class_type) = true;
16469 : :
16470 : : /* Destructors are handled in check_methods. */
16471 : : }
16472 : :
16473 : : /* Check a constructor DECL has the correct form. Complains
16474 : : if the class has a constructor of the form X(X). */
16475 : :
16476 : : bool
16477 : 40666878 : grok_ctor_properties (const_tree ctype, const_tree decl)
16478 : : {
16479 : 40666878 : int ctor_parm = copy_fn_p (decl);
16480 : :
16481 : 40666878 : if (ctor_parm < 0)
16482 : : {
16483 : : /* [class.copy]
16484 : :
16485 : : A declaration of a constructor for a class X is ill-formed if
16486 : : its first parameter is of type (optionally cv-qualified) X
16487 : : and either there are no other parameters or else all other
16488 : : parameters have default arguments.
16489 : :
16490 : : We *don't* complain about member template instantiations that
16491 : : have this form, though; they can occur as we try to decide
16492 : : what constructor to use during overload resolution. Since
16493 : : overload resolution will never prefer such a constructor to
16494 : : the non-template copy constructor (which is either explicitly
16495 : : or implicitly defined), there's no need to worry about their
16496 : : existence. Theoretically, they should never even be
16497 : : instantiated, but that's hard to forestall. */
16498 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
16499 : : "invalid constructor; you probably meant %<%T (const %T&)%>",
16500 : : ctype, ctype);
16501 : 9 : return false;
16502 : : }
16503 : :
16504 : : return true;
16505 : : }
16506 : :
16507 : : /* DECL is a declaration for an overloaded or conversion operator. If
16508 : : COMPLAIN is true, errors are issued for invalid declarations. */
16509 : :
16510 : : bool
16511 : 48139718 : grok_op_properties (tree decl, bool complain)
16512 : : {
16513 : 48139718 : tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
16514 : 48139718 : bool const methodp = DECL_IOBJ_MEMBER_FUNCTION_P (decl);
16515 : 48139718 : tree name = DECL_NAME (decl);
16516 : 48139718 : location_t loc = DECL_SOURCE_LOCATION (decl);
16517 : :
16518 : 48139718 : tree class_type = DECL_CONTEXT (decl);
16519 : 48139718 : if (class_type && !CLASS_TYPE_P (class_type))
16520 : : class_type = NULL_TREE;
16521 : :
16522 : 48139718 : tree_code operator_code;
16523 : 48139718 : unsigned op_flags;
16524 : 48139718 : if (IDENTIFIER_CONV_OP_P (name))
16525 : : {
16526 : : /* Conversion operators are TYPE_EXPR for the purposes of this
16527 : : function. */
16528 : : operator_code = TYPE_EXPR;
16529 : : op_flags = OVL_OP_FLAG_UNARY;
16530 : : }
16531 : : else
16532 : : {
16533 : 46597222 : const ovl_op_info_t *ovl_op = IDENTIFIER_OVL_OP_INFO (name);
16534 : :
16535 : 46597222 : operator_code = ovl_op->tree_code;
16536 : 46597222 : op_flags = ovl_op->flags;
16537 : 46597222 : gcc_checking_assert (operator_code != ERROR_MARK);
16538 : 46597222 : DECL_OVERLOADED_OPERATOR_CODE_RAW (decl) = ovl_op->ovl_op_code;
16539 : : }
16540 : :
16541 : 46597222 : if (op_flags & OVL_OP_FLAG_ALLOC)
16542 : : {
16543 : : /* operator new and operator delete are quite special. */
16544 : 316948 : if (class_type)
16545 : 12248 : switch (op_flags)
16546 : : {
16547 : 8650 : case OVL_OP_FLAG_ALLOC:
16548 : 8650 : TYPE_HAS_NEW_OPERATOR (class_type) = 1;
16549 : 8650 : break;
16550 : :
16551 : 3331 : case OVL_OP_FLAG_ALLOC | OVL_OP_FLAG_DELETE:
16552 : 3331 : TYPE_GETS_DELETE (class_type) |= 1;
16553 : 3331 : break;
16554 : :
16555 : 130 : case OVL_OP_FLAG_ALLOC | OVL_OP_FLAG_VEC:
16556 : 130 : TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
16557 : 130 : break;
16558 : :
16559 : 137 : case OVL_OP_FLAG_ALLOC | OVL_OP_FLAG_DELETE | OVL_OP_FLAG_VEC:
16560 : 137 : TYPE_GETS_DELETE (class_type) |= 2;
16561 : 137 : break;
16562 : :
16563 : 0 : default:
16564 : 0 : gcc_unreachable ();
16565 : : }
16566 : :
16567 : : /* [basic.std.dynamic.allocation]/1:
16568 : :
16569 : : A program is ill-formed if an allocation function is declared
16570 : : in a namespace scope other than global scope or declared
16571 : : static in global scope.
16572 : :
16573 : : The same also holds true for deallocation functions. */
16574 : 316948 : if (DECL_NAMESPACE_SCOPE_P (decl))
16575 : : {
16576 : 304700 : if (CP_DECL_CONTEXT (decl) != global_namespace)
16577 : : {
16578 : 6 : error_at (loc, "%qD may not be declared within a namespace",
16579 : : decl);
16580 : 6 : return false;
16581 : : }
16582 : :
16583 : 304694 : if (!TREE_PUBLIC (decl))
16584 : : {
16585 : 6 : error_at (loc, "%qD may not be declared as static", decl);
16586 : 6 : return false;
16587 : : }
16588 : : }
16589 : :
16590 : : /* Check for replaceable global new/delete operators with
16591 : : const std::nothrow_t & last argument, other replaceable global
16592 : : new/delete operators are marked in cxx_init_decl_processing. */
16593 : 316936 : if (CP_DECL_CONTEXT (decl) == global_namespace)
16594 : : {
16595 : 304688 : tree args = argtypes;
16596 : 304688 : if (args
16597 : 304676 : && args != void_list_node
16598 : 914022 : && same_type_p (TREE_VALUE (args),
16599 : : (op_flags & OVL_OP_FLAG_DELETE)
16600 : : ? ptr_type_node : size_type_node))
16601 : : {
16602 : 304646 : args = TREE_CHAIN (args);
16603 : 304646 : if (aligned_allocation_fn_p (decl))
16604 : 98132 : args = TREE_CHAIN (args);
16605 : 304646 : if (args
16606 : 304640 : && args != void_list_node
16607 : 507985 : && TREE_CHAIN (args) == void_list_node)
16608 : : {
16609 : 178762 : tree t = TREE_VALUE (args);
16610 : 178762 : if (TYPE_REF_P (t)
16611 : 101402 : && !TYPE_REF_IS_RVALUE (t)
16612 : 101402 : && (t = TREE_TYPE (t))
16613 : 101402 : && TYPE_QUALS (t) == TYPE_QUAL_CONST
16614 : 279716 : && is_std_class (t, "nothrow_t"))
16615 : 100954 : DECL_IS_REPLACEABLE_OPERATOR (decl) = 1;
16616 : : }
16617 : : }
16618 : : }
16619 : :
16620 : 316936 : if (op_flags & OVL_OP_FLAG_DELETE)
16621 : : {
16622 : 179764 : DECL_SET_IS_OPERATOR_DELETE (decl, true);
16623 : 179764 : coerce_delete_type (decl, loc);
16624 : : }
16625 : : else
16626 : : {
16627 : 137172 : DECL_SET_IS_OPERATOR_NEW (decl, true);
16628 : 137172 : TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl), loc);
16629 : : }
16630 : :
16631 : 316936 : return true;
16632 : : }
16633 : :
16634 : : /* An operator function must either be a non-static member function
16635 : : or have at least one parameter of a class, a reference to a class,
16636 : : an enumeration, or a reference to an enumeration. 13.4.0.6 */
16637 : 47822770 : if (!DECL_OBJECT_MEMBER_FUNCTION_P (decl))
16638 : : {
16639 : 13464384 : if (operator_code == TYPE_EXPR
16640 : 13464384 : || operator_code == COMPONENT_REF
16641 : 13464363 : || operator_code == NOP_EXPR)
16642 : : {
16643 : 33 : error_at (loc, "%qD must be a non-static member function", decl);
16644 : 33 : return false;
16645 : : }
16646 : :
16647 : 13464351 : if (operator_code == CALL_EXPR || operator_code == ARRAY_REF)
16648 : : {
16649 : 102 : if (! DECL_STATIC_FUNCTION_P (decl))
16650 : : {
16651 : 12 : error_at (loc, "%qD must be a member function", decl);
16652 : 12 : return false;
16653 : : }
16654 : 90 : if (cxx_dialect < cxx23
16655 : : /* For lambdas we diagnose static lambda specifier elsewhere. */
16656 : 95 : && (operator_code == ARRAY_REF || ! LAMBDA_FUNCTION_P (decl))
16657 : : /* For instantiations, we have diagnosed this already. */
16658 : 122 : && ! DECL_USE_TEMPLATE (decl))
16659 : 26 : pedwarn (loc, OPT_Wc__23_extensions, "%qD may be a static member "
16660 : : "function only with %<-std=c++23%> or %<-std=gnu++23%>",
16661 : : decl);
16662 : 90 : if (operator_code == ARRAY_REF)
16663 : : /* static operator[] should have exactly one argument
16664 : : for C++20 and earlier, so that it isn't multidimensional. */
16665 : : op_flags = OVL_OP_FLAG_UNARY;
16666 : : }
16667 : 13464249 : else if (DECL_STATIC_FUNCTION_P (decl))
16668 : : {
16669 : 9 : error_at (loc, "%qD must be either a non-static member "
16670 : : "function or a non-member function", decl);
16671 : 9 : return false;
16672 : : }
16673 : : else
16674 : 421162 : for (tree arg = argtypes; ; arg = TREE_CHAIN (arg))
16675 : : {
16676 : 13885402 : if (!arg || arg == void_list_node)
16677 : : {
16678 : 18 : if (complain)
16679 : 15 : error_at (loc, "%qD must have an argument of class or "
16680 : : "enumerated type", decl);
16681 : 18 : return false;
16682 : : }
16683 : :
16684 : 13885384 : tree type = non_reference (TREE_VALUE (arg));
16685 : 13885384 : if (type == error_mark_node)
16686 : : return false;
16687 : :
16688 : : /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
16689 : : because these checks are performed even on template
16690 : : functions. */
16691 : 13885381 : if (MAYBE_CLASS_TYPE_P (type)
16692 : 1337042 : || TREE_CODE (type) == ENUMERAL_TYPE)
16693 : : break;
16694 : 421162 : }
16695 : : }
16696 : :
16697 : 47822659 : if (operator_code == CALL_EXPR)
16698 : : /* There are no further restrictions on the arguments to an overloaded
16699 : : "operator ()". */
16700 : : return true;
16701 : :
16702 : : /* C++23 allows an arbitrary number of parameters and default arguments for
16703 : : operator[], and none of the other checks below apply. */
16704 : 41979899 : if (operator_code == ARRAY_REF && cxx_dialect >= cxx23)
16705 : : return true;
16706 : :
16707 : 41669202 : if (operator_code == COND_EXPR)
16708 : : {
16709 : : /* 13.4.0.3 */
16710 : 6 : error_at (loc, "ISO C++ prohibits overloading %<operator ?:%>");
16711 : 6 : return false;
16712 : : }
16713 : :
16714 : : /* Count the number of arguments and check for ellipsis. */
16715 : : int arity = 0;
16716 : 119323604 : for (tree arg = argtypes; arg != void_list_node; arg = TREE_CHAIN (arg))
16717 : : {
16718 : 77654423 : if (!arg)
16719 : : {
16720 : 15 : error_at (loc, "%qD must not have variable number of arguments",
16721 : : decl);
16722 : 15 : return false;
16723 : : }
16724 : 77654408 : ++arity;
16725 : : }
16726 : : /* FIXME: We need tests for these errors with xobj member functions. */
16727 : : /* Verify correct number of arguments. */
16728 : 41669181 : switch (op_flags)
16729 : : {
16730 : 7129975 : case OVL_OP_FLAG_AMBIARY:
16731 : 7129975 : if (arity == 1)
16732 : : {
16733 : : /* We have a unary instance of an ambi-ary op. Remap to the
16734 : : unary one. */
16735 : 3253990 : unsigned alt = ovl_op_alternate[ovl_op_mapping [operator_code]];
16736 : 3253990 : const ovl_op_info_t *ovl_op = &ovl_op_info[false][alt];
16737 : 3253990 : gcc_checking_assert (ovl_op->flags == OVL_OP_FLAG_UNARY);
16738 : 3253990 : operator_code = ovl_op->tree_code;
16739 : 3253990 : DECL_OVERLOADED_OPERATOR_CODE_RAW (decl) = ovl_op->ovl_op_code;
16740 : : }
16741 : 3875985 : else if (arity != 2)
16742 : : {
16743 : : /* This was an ambiguous operator but is invalid. */
16744 : 3 : error_at (loc,
16745 : : methodp
16746 : : ? G_("%qD must have either zero or one argument")
16747 : : : G_("%qD must have either one or two arguments"), decl);
16748 : 3 : return false;
16749 : : }
16750 : 3875982 : else if ((operator_code == POSTINCREMENT_EXPR
16751 : 3875982 : || operator_code == POSTDECREMENT_EXPR)
16752 : 1973115 : && ! processing_template_decl
16753 : : /* x++ and x--'s second argument must be an int. */
16754 : 5179830 : && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)),
16755 : : integer_type_node))
16756 : : {
16757 : 15 : error_at (loc,
16758 : : methodp
16759 : : ? G_("postfix %qD must have %<int%> as its argument")
16760 : : : G_("postfix %qD must have %<int%> as its second argument"),
16761 : : decl);
16762 : 15 : return false;
16763 : : }
16764 : : break;
16765 : :
16766 : 2429994 : case OVL_OP_FLAG_UNARY:
16767 : 2429994 : if (arity != 1)
16768 : : {
16769 : 12 : error_at (loc,
16770 : : methodp
16771 : : ? G_("%qD must have no arguments")
16772 : : : G_("%qD must have exactly one argument"), decl);
16773 : 12 : return false;
16774 : : }
16775 : : break;
16776 : :
16777 : 32109212 : case OVL_OP_FLAG_BINARY:
16778 : 32109212 : if (arity != 2)
16779 : : {
16780 : 3 : error_at (loc,
16781 : : methodp
16782 : : ? G_("%qD must have exactly one argument")
16783 : : : G_("%qD must have exactly two arguments"), decl);
16784 : 3 : return false;
16785 : : }
16786 : : break;
16787 : :
16788 : 0 : default:
16789 : 0 : gcc_unreachable ();
16790 : : }
16791 : :
16792 : : /* There can be no default arguments. */
16793 : 119323457 : for (tree arg = argtypes; arg && arg != void_list_node;
16794 : 77654309 : arg = TREE_CHAIN (arg))
16795 : 77654324 : if (TREE_PURPOSE (arg))
16796 : : {
16797 : 15 : TREE_PURPOSE (arg) = NULL_TREE;
16798 : 15 : error_at (loc, "%qD cannot have default arguments", decl);
16799 : 15 : return false;
16800 : : }
16801 : :
16802 : : /* At this point the declaration is well-formed. It may not be
16803 : : sensible though. */
16804 : :
16805 : : /* Check member function warnings only on the in-class declaration.
16806 : : There's no point warning on an out-of-class definition. */
16807 : 41669133 : if (class_type && class_type != current_class_type)
16808 : : return true;
16809 : :
16810 : : /* Warn about conversion operators that will never be used. */
16811 : 39772827 : if (IDENTIFIER_CONV_OP_P (name)
16812 : 1542100 : && ! DECL_TEMPLATE_INFO (decl)
16813 : 40371279 : && warn_class_conversion)
16814 : : {
16815 : 598419 : tree t = TREE_TYPE (name);
16816 : 598419 : int ref = TYPE_REF_P (t);
16817 : :
16818 : 598419 : if (ref)
16819 : 22592 : t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
16820 : :
16821 : 598419 : if (VOID_TYPE_P (t))
16822 : 9 : warning_at (loc, OPT_Wclass_conversion, "converting %qT to %<void%> "
16823 : : "will never use a type conversion operator", class_type);
16824 : 598410 : else if (class_type)
16825 : : {
16826 : 598410 : if (same_type_ignoring_top_level_qualifiers_p (t, class_type))
16827 : 24 : warning_at (loc, OPT_Wclass_conversion,
16828 : : ref
16829 : : ? G_("converting %qT to a reference to the same type "
16830 : : "will never use a type conversion operator")
16831 : : : G_("converting %qT to the same type "
16832 : : "will never use a type conversion operator"),
16833 : : class_type);
16834 : : /* Don't force t to be complete here. */
16835 : 598395 : else if (MAYBE_CLASS_TYPE_P (t)
16836 : 264585 : && COMPLETE_TYPE_P (t)
16837 : 54705 : && DERIVED_FROM_P (t, class_type))
16838 : 30 : warning_at (loc, OPT_Wclass_conversion,
16839 : : ref
16840 : : ? G_("converting %qT to a reference to a base class "
16841 : : "%qT will never use a type conversion operator")
16842 : : : G_("converting %qT to a base class %qT "
16843 : : "will never use a type conversion operator"),
16844 : : class_type, t);
16845 : : }
16846 : : }
16847 : :
16848 : 39772827 : if (!warn_ecpp)
16849 : : return true;
16850 : :
16851 : : /* Effective C++ rules below. */
16852 : :
16853 : : /* More Effective C++ rule 7. */
16854 : 54 : if (operator_code == TRUTH_ANDIF_EXPR
16855 : 54 : || operator_code == TRUTH_ORIF_EXPR
16856 : 54 : || operator_code == COMPOUND_EXPR)
16857 : 0 : warning_at (loc, OPT_Weffc__,
16858 : : "user-defined %qD always evaluates both arguments", decl);
16859 : :
16860 : : /* More Effective C++ rule 6. */
16861 : 54 : if (operator_code == POSTINCREMENT_EXPR
16862 : : || operator_code == POSTDECREMENT_EXPR
16863 : : || operator_code == PREINCREMENT_EXPR
16864 : 54 : || operator_code == PREDECREMENT_EXPR)
16865 : : {
16866 : 0 : tree arg = TREE_VALUE (argtypes);
16867 : 0 : tree ret = TREE_TYPE (TREE_TYPE (decl));
16868 : 0 : if (methodp || TYPE_REF_P (arg))
16869 : 0 : arg = TREE_TYPE (arg);
16870 : 0 : arg = TYPE_MAIN_VARIANT (arg);
16871 : :
16872 : 0 : if (operator_code == PREINCREMENT_EXPR
16873 : : || operator_code == PREDECREMENT_EXPR)
16874 : : {
16875 : 0 : if (!TYPE_REF_P (ret)
16876 : 0 : || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)), arg))
16877 : 0 : warning_at (loc, OPT_Weffc__, "prefix %qD should return %qT", decl,
16878 : : build_reference_type (arg));
16879 : : }
16880 : : else
16881 : : {
16882 : 0 : if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
16883 : 0 : warning_at (loc, OPT_Weffc__,
16884 : : "postfix %qD should return %qT", decl, arg);
16885 : : }
16886 : : }
16887 : :
16888 : : /* Effective C++ rule 23. */
16889 : 54 : if (!DECL_ASSIGNMENT_OPERATOR_P (decl)
16890 : : && (operator_code == PLUS_EXPR
16891 : 9 : || operator_code == MINUS_EXPR
16892 : 9 : || operator_code == TRUNC_DIV_EXPR
16893 : : || operator_code == MULT_EXPR
16894 : : || operator_code == TRUNC_MOD_EXPR)
16895 : 60 : && TYPE_REF_P (TREE_TYPE (TREE_TYPE (decl))))
16896 : 3 : warning_at (loc, OPT_Weffc__, "%qD should return by value", decl);
16897 : :
16898 : : return true;
16899 : : }
16900 : :
16901 : : /* Return a string giving the keyword associate with CODE. */
16902 : :
16903 : : static const char *
16904 : 111 : tag_name (enum tag_types code)
16905 : : {
16906 : 111 : switch (code)
16907 : : {
16908 : : case record_type:
16909 : : return "struct";
16910 : 60 : case class_type:
16911 : 60 : return "class";
16912 : 0 : case union_type:
16913 : 0 : return "union";
16914 : 3 : case enum_type:
16915 : 3 : return "enum";
16916 : 0 : case typename_type:
16917 : 0 : return "typename";
16918 : 0 : default:
16919 : 0 : gcc_unreachable ();
16920 : : }
16921 : : }
16922 : :
16923 : : /* Name lookup in an elaborated-type-specifier (after the keyword
16924 : : indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
16925 : : elaborated-type-specifier is invalid, issue a diagnostic and return
16926 : : error_mark_node; otherwise, return the *_TYPE to which it referred.
16927 : : If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
16928 : :
16929 : : tree
16930 : 10981640 : check_elaborated_type_specifier (enum tag_types tag_code,
16931 : : tree decl,
16932 : : bool allow_template_p)
16933 : : {
16934 : 10981640 : tree type;
16935 : :
16936 : : /* In the case of:
16937 : :
16938 : : struct S { struct S *p; };
16939 : :
16940 : : name lookup will find the TYPE_DECL for the implicit "S::S"
16941 : : typedef. Adjust for that here. */
16942 : 10981640 : if (DECL_SELF_REFERENCE_P (decl))
16943 : 321205 : decl = TYPE_NAME (TREE_TYPE (decl));
16944 : :
16945 : 10981640 : type = TREE_TYPE (decl);
16946 : :
16947 : : /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
16948 : : is false for this case as well. */
16949 : 10981640 : if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
16950 : : {
16951 : 9 : error ("using template type parameter %qT after %qs",
16952 : : type, tag_name (tag_code));
16953 : 9 : return error_mark_node;
16954 : : }
16955 : : /* Accept template template parameters. */
16956 : 10981631 : else if (allow_template_p
16957 : 6279785 : && (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM
16958 : 6279773 : || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM))
16959 : : ;
16960 : : /* [dcl.type.elab]
16961 : :
16962 : : If the identifier resolves to a typedef-name or the
16963 : : simple-template-id resolves to an alias template
16964 : : specialization, the elaborated-type-specifier is ill-formed.
16965 : :
16966 : : In other words, the only legitimate declaration to use in the
16967 : : elaborated type specifier is the implicit typedef created when
16968 : : the type is declared. */
16969 : 10981616 : else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
16970 : 321312 : && !DECL_SELF_REFERENCE_P (decl)
16971 : 10981723 : && tag_code != typename_type)
16972 : : {
16973 : 78 : auto_diagnostic_group d;
16974 : 78 : if (alias_template_specialization_p (type, nt_opaque))
16975 : 21 : error ("using alias template specialization %qT after %qs",
16976 : : type, tag_name (tag_code));
16977 : : else
16978 : 57 : error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
16979 : 78 : inform (DECL_SOURCE_LOCATION (decl),
16980 : : "%qD has a previous declaration here", decl);
16981 : 78 : return error_mark_node;
16982 : 78 : }
16983 : 10981538 : else if (TREE_CODE (type) != RECORD_TYPE
16984 : 10981538 : && TREE_CODE (type) != UNION_TYPE
16985 : : && tag_code != enum_type
16986 : 62131 : && tag_code != typename_type)
16987 : : {
16988 : 6 : auto_diagnostic_group d;
16989 : 6 : error ("%qT referred to as %qs", type, tag_name (tag_code));
16990 : 6 : inform (location_of (type), "%qT has a previous declaration here", type);
16991 : 6 : return error_mark_node;
16992 : 6 : }
16993 : 10981532 : else if (TREE_CODE (type) != ENUMERAL_TYPE
16994 : 10919433 : && tag_code == enum_type)
16995 : : {
16996 : 3 : auto_diagnostic_group d;
16997 : 3 : error ("%qT referred to as enum", type);
16998 : 3 : inform (location_of (type), "%qT has a previous declaration here", type);
16999 : 3 : return error_mark_node;
17000 : 3 : }
17001 : 10981529 : else if (!allow_template_p
17002 : 4701786 : && TREE_CODE (type) == RECORD_TYPE
17003 : 15568958 : && CLASSTYPE_IS_TEMPLATE (type))
17004 : : {
17005 : : /* If a class template appears as elaborated type specifier
17006 : : without a template header such as:
17007 : :
17008 : : template <class T> class C {};
17009 : : void f(class C); // No template header here
17010 : :
17011 : : then the required template argument is missing. */
17012 : 18 : error ("template argument required for %<%s %T%>",
17013 : : tag_name (tag_code),
17014 : 18 : DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
17015 : 18 : return error_mark_node;
17016 : : }
17017 : :
17018 : : return type;
17019 : : }
17020 : :
17021 : : /* Lookup NAME of an elaborated type specifier according to SCOPE and
17022 : : issue diagnostics if necessary. Return *_TYPE node upon success,
17023 : : NULL_TREE when the NAME is not found, and ERROR_MARK_NODE for type
17024 : : error. */
17025 : :
17026 : : static tree
17027 : 21538255 : lookup_and_check_tag (enum tag_types tag_code, tree name,
17028 : : TAG_how how, bool template_header_p)
17029 : : {
17030 : 21538255 : tree decl;
17031 : 21538255 : if (how == TAG_how::GLOBAL)
17032 : : {
17033 : : /* First try ordinary name lookup, ignoring hidden class name
17034 : : injected via friend declaration. */
17035 : 1856436 : decl = lookup_name (name, LOOK_want::TYPE);
17036 : : /* If that fails, the name will be placed in the smallest
17037 : : non-class, non-function-prototype scope according to 3.3.1/5.
17038 : : We may already have a hidden name declared as friend in this
17039 : : scope. So lookup again but not ignoring hidden names.
17040 : : If we find one, that name will be made visible rather than
17041 : : creating a new tag. */
17042 : 1856436 : if (!decl)
17043 : 17640 : decl = lookup_elaborated_type (name, TAG_how::INNERMOST_NON_CLASS);
17044 : : }
17045 : : else
17046 : 19681819 : decl = lookup_elaborated_type (name, how);
17047 : :
17048 : 19699459 : if (!decl)
17049 : : /* We found nothing. */
17050 : : return NULL_TREE;
17051 : :
17052 : 4835209 : if (TREE_CODE (decl) == TREE_LIST)
17053 : : {
17054 : 3 : auto_diagnostic_group d;
17055 : 3 : error ("reference to %qD is ambiguous", name);
17056 : 3 : print_candidates (decl);
17057 : 3 : return error_mark_node;
17058 : 3 : }
17059 : :
17060 : 2021647 : if (DECL_CLASS_TEMPLATE_P (decl)
17061 : 2021641 : && !template_header_p
17062 : 6856847 : && how == TAG_how::CURRENT_ONLY)
17063 : : {
17064 : 12 : auto_diagnostic_group d;
17065 : 12 : error ("class template %qD redeclared as non-template", name);
17066 : 12 : inform (location_of (decl), "previous declaration here");
17067 : 12 : CLASSTYPE_ERRONEOUS (TREE_TYPE (decl)) = true;
17068 : 12 : return error_mark_node;
17069 : 12 : }
17070 : :
17071 : 2021635 : if (DECL_CLASS_TEMPLATE_P (decl)
17072 : : /* If scope is TAG_how::CURRENT_ONLY we're defining a class,
17073 : : so ignore a template template parameter. */
17074 : 4835200 : || (how != TAG_how::CURRENT_ONLY && DECL_TEMPLATE_TEMPLATE_PARM_P (decl)))
17075 : 2021632 : decl = DECL_TEMPLATE_RESULT (decl);
17076 : :
17077 : 4835194 : if (TREE_CODE (decl) != TYPE_DECL)
17078 : : /* Found not-a-type. */
17079 : : return NULL_TREE;
17080 : :
17081 : : /* Look for invalid nested type:
17082 : : class C {
17083 : : class C {};
17084 : : }; */
17085 : 4835173 : if (how == TAG_how::CURRENT_ONLY && DECL_SELF_REFERENCE_P (decl))
17086 : : {
17087 : 6 : error ("%qD has the same name as the class in which it is "
17088 : : "declared", decl);
17089 : 6 : return error_mark_node;
17090 : : }
17091 : :
17092 : : /* Two cases we need to consider when deciding if a class
17093 : : template is allowed as an elaborated type specifier:
17094 : : 1. It is a self reference to its own class.
17095 : : 2. It comes with a template header.
17096 : :
17097 : : For example:
17098 : :
17099 : : template <class T> class C {
17100 : : class C *c1; // DECL_SELF_REFERENCE_P is true
17101 : : class D;
17102 : : };
17103 : : template <class U> class C; // template_header_p is true
17104 : : template <class T> class C<T>::D {
17105 : : class C *c2; // DECL_SELF_REFERENCE_P is true
17106 : : }; */
17107 : :
17108 : 14505501 : tree t = check_elaborated_type_specifier (tag_code, decl,
17109 : : template_header_p
17110 : 9349144 : | DECL_SELF_REFERENCE_P (decl));
17111 : 2136162 : if (template_header_p && t && CLASS_TYPE_P (t)
17112 : 6971311 : && (!CLASSTYPE_TEMPLATE_INFO (t)
17113 : 2136126 : || (!PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))))
17114 : : {
17115 : 21 : auto_diagnostic_group d;
17116 : 21 : error ("%qT is not a template", t);
17117 : 21 : inform (location_of (t), "previous declaration here");
17118 : 42 : if (TYPE_CLASS_SCOPE_P (t)
17119 : 24 : && CLASSTYPE_TEMPLATE_INFO (TYPE_CONTEXT (t)))
17120 : 3 : inform (input_location,
17121 : : "perhaps you want to explicitly add %<%T::%>",
17122 : 3 : TYPE_CONTEXT (t));
17123 : 21 : return error_mark_node;
17124 : 21 : }
17125 : :
17126 : : return t;
17127 : : }
17128 : :
17129 : : /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
17130 : : Define the tag as a forward-reference if it is not defined.
17131 : :
17132 : : If a declaration is given, process it here, and report an error if
17133 : : multiple declarations are not identical.
17134 : :
17135 : : SCOPE is TS_CURRENT when this is also a definition. Only look in
17136 : : the current frame for the name (since C++ allows new names in any
17137 : : scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
17138 : : declaration. Only look beginning from the current scope outward up
17139 : : till the nearest non-class scope. Otherwise it is TS_GLOBAL.
17140 : :
17141 : : TEMPLATE_HEADER_P is true when this declaration is preceded by
17142 : : a set of template parameters. */
17143 : :
17144 : : tree
17145 : 20979215 : xref_tag (enum tag_types tag_code, tree name,
17146 : : TAG_how how, bool template_header_p)
17147 : : {
17148 : 20979215 : enum tree_code code;
17149 : 20979215 : tree context = NULL_TREE;
17150 : :
17151 : 20979215 : auto_cond_timevar tv (TV_NAME_LOOKUP);
17152 : :
17153 : 20979215 : gcc_assert (identifier_p (name));
17154 : :
17155 : 20979215 : switch (tag_code)
17156 : : {
17157 : : case record_type:
17158 : : case class_type:
17159 : : code = RECORD_TYPE;
17160 : : break;
17161 : : case union_type:
17162 : : code = UNION_TYPE;
17163 : : break;
17164 : : case enum_type:
17165 : : code = ENUMERAL_TYPE;
17166 : : break;
17167 : 0 : default:
17168 : 0 : gcc_unreachable ();
17169 : : }
17170 : :
17171 : : /* In case of anonymous name, xref_tag is only called to
17172 : : make type node and push name. Name lookup is not required. */
17173 : 20979215 : tree t = NULL_TREE;
17174 : 20979215 : if (!IDENTIFIER_ANON_P (name))
17175 : 19529064 : t = lookup_and_check_tag (tag_code, name, how, template_header_p);
17176 : :
17177 : 20979215 : if (t == error_mark_node)
17178 : : return error_mark_node;
17179 : :
17180 : 2422369 : if (how != TAG_how::CURRENT_ONLY && t && current_class_type
17181 : 1045962 : && template_class_depth (current_class_type)
17182 : 21373456 : && template_header_p)
17183 : : {
17184 : 266291 : if (TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM)
17185 : : return t;
17186 : :
17187 : : /* Since HOW is not TAG_how::CURRENT_ONLY, we are not looking at
17188 : : a definition of this tag. Since, in addition, we are
17189 : : currently processing a (member) template declaration of a
17190 : : template class, we must be very careful; consider:
17191 : :
17192 : : template <class X> struct S1
17193 : :
17194 : : template <class U> struct S2
17195 : : {
17196 : : template <class V> friend struct S1;
17197 : : };
17198 : :
17199 : : Here, the S2::S1 declaration should not be confused with the
17200 : : outer declaration. In particular, the inner version should
17201 : : have a template parameter of level 2, not level 1.
17202 : :
17203 : : On the other hand, when presented with:
17204 : :
17205 : : template <class T> struct S1
17206 : : {
17207 : : template <class U> struct S2 {};
17208 : : template <class U> friend struct S2;
17209 : : };
17210 : :
17211 : : the friend must find S1::S2 eventually. We accomplish this
17212 : : by making sure that the new type we create to represent this
17213 : : declaration has the right TYPE_CONTEXT. */
17214 : 266288 : context = TYPE_CONTEXT (t);
17215 : 266288 : t = NULL_TREE;
17216 : : }
17217 : :
17218 : 20979101 : if (! t)
17219 : : {
17220 : : /* If no such tag is yet defined, create a forward-reference node
17221 : : and record it as the "definition".
17222 : : When a real declaration of this type is found,
17223 : : the forward-reference will be altered into a real type. */
17224 : 16443880 : if (code == ENUMERAL_TYPE)
17225 : : {
17226 : 14 : error ("use of enum %q#D without previous declaration", name);
17227 : 14 : return error_mark_node;
17228 : : }
17229 : :
17230 : 16443866 : t = make_class_type (code);
17231 : 16443866 : TYPE_CONTEXT (t) = context;
17232 : 16443866 : if (IDENTIFIER_LAMBDA_P (name))
17233 : : /* Mark it as a lambda type right now. Our caller will
17234 : : correct the value. */
17235 : 812565 : CLASSTYPE_LAMBDA_EXPR (t) = error_mark_node;
17236 : 16443866 : t = pushtag (name, t, how);
17237 : : }
17238 : : else
17239 : : {
17240 : 4535221 : if (template_header_p && MAYBE_CLASS_TYPE_P (t))
17241 : : {
17242 : : /* Check that we aren't trying to overload a class with different
17243 : : constraints. */
17244 : 1869835 : if (!redeclare_class_template (t, current_template_parms,
17245 : : current_template_constraints ()))
17246 : 60 : return error_mark_node;
17247 : : }
17248 : 2665386 : else if (!processing_template_decl
17249 : 2514662 : && CLASS_TYPE_P (t)
17250 : 5154058 : && CLASSTYPE_IS_TEMPLATE (t))
17251 : : {
17252 : 0 : auto_diagnostic_group d;
17253 : 0 : error ("redeclaration of %qT as a non-template", t);
17254 : 0 : inform (location_of (t), "previous declaration %qD", t);
17255 : 0 : return error_mark_node;
17256 : 0 : }
17257 : :
17258 : 4535161 : if (modules_p ()
17259 : 4535161 : && how == TAG_how::CURRENT_ONLY)
17260 : : {
17261 : 8555 : tree decl = TYPE_NAME (t);
17262 : 8555 : if (!module_may_redeclare (decl))
17263 : 15 : return error_mark_node;
17264 : :
17265 : 8540 : tree not_tmpl = STRIP_TEMPLATE (decl);
17266 : 8540 : if (DECL_LANG_SPECIFIC (not_tmpl)
17267 : 3968 : && DECL_MODULE_ATTACH_P (not_tmpl)
17268 : 39 : && !DECL_MODULE_EXPORT_P (not_tmpl)
17269 : 8573 : && module_exporting_p ())
17270 : : {
17271 : 6 : auto_diagnostic_group d;
17272 : 6 : error ("conflicting exporting for declaration %qD", decl);
17273 : 6 : inform (DECL_SOURCE_LOCATION (decl),
17274 : : "previously declared here without exporting");
17275 : 6 : }
17276 : :
17277 : 8540 : tree maybe_tmpl = decl;
17278 : 8540 : if (CLASS_TYPE_P (t) && CLASSTYPE_IS_TEMPLATE (t))
17279 : 6255 : maybe_tmpl = CLASSTYPE_TI_TEMPLATE (t);
17280 : :
17281 : : /* FIXME: we should do a more precise check for redefinitions
17282 : : of a conflicting using-declaration here, as these diagnostics
17283 : : are not ideal. */
17284 : 8540 : if (DECL_LANG_SPECIFIC (decl)
17285 : 3968 : && DECL_MODULE_IMPORT_P (decl)
17286 : 8582 : && CP_DECL_CONTEXT (decl) == current_namespace)
17287 : : {
17288 : : /* Push it into this TU's symbol slot. */
17289 : 39 : if (maybe_tmpl != decl)
17290 : : /* We're in the template parm binding level.
17291 : : Pushtag has logic to slide under that, but we're
17292 : : not pushing a *new* type. */
17293 : 18 : push_nested_namespace (CP_DECL_CONTEXT (decl));
17294 : :
17295 : 39 : pushdecl (maybe_tmpl);
17296 : 39 : if (maybe_tmpl != decl)
17297 : 18 : pop_nested_namespace (CP_DECL_CONTEXT (decl));
17298 : : }
17299 : :
17300 : 8540 : set_instantiating_module (maybe_tmpl);
17301 : : }
17302 : : }
17303 : :
17304 : : return t;
17305 : 20979215 : }
17306 : :
17307 : : /* Create the binfo hierarchy for REF with (possibly NULL) base list
17308 : : BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
17309 : : access_* node, and the TREE_VALUE is the type of the base-class.
17310 : : Non-NULL TREE_TYPE indicates virtual inheritance. */
17311 : :
17312 : : void
17313 : 53445985 : xref_basetypes (tree ref, tree base_list)
17314 : : {
17315 : 53445985 : tree *basep;
17316 : 53445985 : tree binfo, base_binfo;
17317 : 53445985 : unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
17318 : 53445985 : unsigned max_bases = 0; /* Maximum direct bases. */
17319 : 53445985 : unsigned max_dvbases = 0; /* Maximum direct virtual bases. */
17320 : 53445985 : int i;
17321 : 53445985 : tree default_access;
17322 : 53445985 : tree igo_prev; /* Track Inheritance Graph Order. */
17323 : :
17324 : 53445985 : if (ref == error_mark_node)
17325 : 12 : return;
17326 : :
17327 : : /* The base of a derived class is private by default, all others are
17328 : : public. */
17329 : 106891970 : default_access = (TREE_CODE (ref) == RECORD_TYPE
17330 : 52945913 : && CLASSTYPE_DECLARED_CLASS (ref)
17331 : 106391898 : ? access_private_node : access_public_node);
17332 : :
17333 : : /* First, make sure that any templates in base-classes are
17334 : : instantiated. This ensures that if we call ourselves recursively
17335 : : we do not get confused about which classes are marked and which
17336 : : are not. */
17337 : 53445985 : basep = &base_list;
17338 : 81611517 : while (*basep)
17339 : : {
17340 : 28165532 : tree basetype = TREE_VALUE (*basep);
17341 : :
17342 : : /* The dependent_type_p call below should really be dependent_scope_p
17343 : : so that we give a hard error about using an incomplete type as a
17344 : : base, but we allow it with a pedwarn for backward
17345 : : compatibility. */
17346 : 28165532 : if (processing_template_decl
17347 : 28165532 : && CLASS_TYPE_P (basetype) && TYPE_BEING_DEFINED (basetype))
17348 : 3 : cxx_incomplete_type_diagnostic (NULL_TREE, basetype, DK_PEDWARN);
17349 : 28165532 : if (!dependent_type_p (basetype)
17350 : 28165532 : && !complete_type_or_else (basetype, NULL))
17351 : : /* An incomplete type. Remove it from the list. */
17352 : 15 : *basep = TREE_CHAIN (*basep);
17353 : : else
17354 : : {
17355 : 28165517 : max_bases++;
17356 : 28165517 : if (TREE_TYPE (*basep))
17357 : 67871 : max_dvbases++;
17358 : 28165517 : if (CLASS_TYPE_P (basetype))
17359 : 27268129 : max_vbases += vec_safe_length (CLASSTYPE_VBASECLASSES (basetype));
17360 : 28165517 : basep = &TREE_CHAIN (*basep);
17361 : : }
17362 : : }
17363 : 53445985 : max_vbases += max_dvbases;
17364 : :
17365 : 53445985 : TYPE_MARKED_P (ref) = 1;
17366 : :
17367 : : /* The binfo slot should be empty, unless this is an (ill-formed)
17368 : : redefinition. */
17369 : 53445985 : gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
17370 : :
17371 : 53445985 : gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
17372 : :
17373 : 53445985 : binfo = make_tree_binfo (max_bases);
17374 : :
17375 : 53445985 : TYPE_BINFO (ref) = binfo;
17376 : 53445985 : BINFO_OFFSET (binfo) = size_zero_node;
17377 : 53445985 : BINFO_TYPE (binfo) = ref;
17378 : :
17379 : : /* Apply base-class info set up to the variants of this type. */
17380 : 53445985 : fixup_type_variants (ref);
17381 : :
17382 : 53445985 : if (max_bases)
17383 : : {
17384 : 27305655 : vec_alloc (BINFO_BASE_ACCESSES (binfo), max_bases);
17385 : : /* A C++98 POD cannot have base classes. */
17386 : 27305655 : CLASSTYPE_NON_LAYOUT_POD_P (ref) = true;
17387 : :
17388 : 27305655 : if (TREE_CODE (ref) == UNION_TYPE)
17389 : : {
17390 : 12 : error ("derived union %qT invalid", ref);
17391 : 12 : return;
17392 : : }
17393 : : }
17394 : :
17395 : 27305643 : if (max_bases > 1)
17396 : 667388 : warning (OPT_Wmultiple_inheritance,
17397 : : "%qT defined with multiple direct bases", ref);
17398 : :
17399 : 53445973 : if (max_vbases)
17400 : : {
17401 : : /* An aggregate can't have virtual base classes. */
17402 : 206143 : CLASSTYPE_NON_AGGREGATE (ref) = true;
17403 : :
17404 : 206143 : vec_alloc (CLASSTYPE_VBASECLASSES (ref), max_vbases);
17405 : :
17406 : 206143 : if (max_dvbases)
17407 : 66871 : warning (OPT_Wvirtual_inheritance,
17408 : : "%qT defined with direct virtual base", ref);
17409 : : }
17410 : :
17411 : 81611478 : for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
17412 : : {
17413 : 28165505 : tree access = TREE_PURPOSE (base_list);
17414 : 28165505 : int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
17415 : 28165505 : tree basetype = TREE_VALUE (base_list);
17416 : :
17417 : 28165505 : if (access == access_default_node)
17418 : 4329564 : access = default_access;
17419 : :
17420 : : /* Before C++17, an aggregate cannot have base classes. In C++17, an
17421 : : aggregate can't have virtual, private, or protected base classes. */
17422 : 28165505 : if (cxx_dialect < cxx17
17423 : 27953581 : || access != access_public_node
17424 : 27030102 : || via_virtual)
17425 : 1200569 : CLASSTYPE_NON_AGGREGATE (ref) = true;
17426 : :
17427 : 28165505 : if (PACK_EXPANSION_P (basetype))
17428 : 20507 : basetype = PACK_EXPANSION_PATTERN (basetype);
17429 : 28165505 : if (TREE_CODE (basetype) == TYPE_DECL)
17430 : 0 : basetype = TREE_TYPE (basetype);
17431 : 28165505 : if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
17432 : : {
17433 : 24 : error ("base type %qT fails to be a struct or class type",
17434 : : basetype);
17435 : 24 : goto dropped_base;
17436 : : }
17437 : :
17438 : 28165481 : base_binfo = NULL_TREE;
17439 : 28165481 : if (CLASS_TYPE_P (basetype) && !dependent_scope_p (basetype))
17440 : : {
17441 : 21737759 : base_binfo = TYPE_BINFO (basetype);
17442 : : /* The original basetype could have been a typedef'd type. */
17443 : 21737759 : basetype = BINFO_TYPE (base_binfo);
17444 : :
17445 : : /* Inherit flags from the base. */
17446 : 65213277 : TYPE_HAS_NEW_OPERATOR (ref)
17447 : 21737759 : |= TYPE_HAS_NEW_OPERATOR (basetype);
17448 : 65213277 : TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
17449 : 21737759 : |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
17450 : 21737759 : TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
17451 : 21737759 : TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
17452 : 65213277 : CLASSTYPE_DIAMOND_SHAPED_P (ref)
17453 : 21737759 : |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
17454 : 65213277 : CLASSTYPE_REPEATED_BASE_P (ref)
17455 : 21737759 : |= CLASSTYPE_REPEATED_BASE_P (basetype);
17456 : : }
17457 : :
17458 : : /* We must do this test after we've seen through a typedef
17459 : : type. */
17460 : 28165481 : if (TYPE_MARKED_P (basetype))
17461 : : {
17462 : 18 : if (basetype == ref)
17463 : 0 : error ("recursive type %qT undefined", basetype);
17464 : : else
17465 : 18 : error ("duplicate base type %qT invalid", basetype);
17466 : 18 : goto dropped_base;
17467 : : }
17468 : :
17469 : 28165463 : if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
17470 : : /* Regenerate the pack expansion for the bases. */
17471 : 20507 : basetype = make_pack_expansion (basetype);
17472 : :
17473 : 28165463 : TYPE_MARKED_P (basetype) = 1;
17474 : :
17475 : 28165463 : base_binfo = copy_binfo (base_binfo, basetype, ref,
17476 : : &igo_prev, via_virtual);
17477 : 28165463 : if (!BINFO_INHERITANCE_CHAIN (base_binfo))
17478 : 28097607 : BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
17479 : :
17480 : 28165463 : BINFO_BASE_APPEND (binfo, base_binfo);
17481 : 28165463 : BINFO_BASE_ACCESS_APPEND (binfo, access);
17482 : 28165463 : continue;
17483 : :
17484 : 42 : dropped_base:
17485 : : /* Update max_vbases to reflect the reality that we are dropping
17486 : : this base: if it reaches zero we want to undo the vec_alloc
17487 : : above to avoid inconsistencies during error-recovery: eg, in
17488 : : build_special_member_call, CLASSTYPE_VBASECLASSES non null
17489 : : and vtt null (c++/27952). */
17490 : 42 : if (via_virtual)
17491 : 12 : max_vbases--;
17492 : 42 : if (CLASS_TYPE_P (basetype))
17493 : 30 : max_vbases
17494 : 33 : -= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype));
17495 : 28165463 : }
17496 : :
17497 : 53445973 : if (CLASSTYPE_VBASECLASSES (ref)
17498 : 53445973 : && max_vbases == 0)
17499 : 24 : vec_free (CLASSTYPE_VBASECLASSES (ref));
17500 : :
17501 : 53652104 : if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref)) < max_vbases)
17502 : : /* If we didn't get max_vbases vbases, we must have shared at
17503 : : least one of them, and are therefore diamond shaped. */
17504 : 22002 : CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
17505 : :
17506 : : /* Unmark all the types. */
17507 : 81611436 : for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
17508 : 28165463 : TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
17509 : 53445973 : TYPE_MARKED_P (ref) = 0;
17510 : :
17511 : : /* Now see if we have a repeated base type. */
17512 : 53445973 : if (!CLASSTYPE_REPEATED_BASE_P (ref))
17513 : : {
17514 : 138534395 : for (base_binfo = binfo; base_binfo;
17515 : 85088854 : base_binfo = TREE_CHAIN (base_binfo))
17516 : : {
17517 : 85089564 : if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
17518 : : {
17519 : 710 : CLASSTYPE_REPEATED_BASE_P (ref) = 1;
17520 : 710 : break;
17521 : : }
17522 : 85088854 : TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
17523 : : }
17524 : 138534395 : for (base_binfo = binfo; base_binfo;
17525 : 85088854 : base_binfo = TREE_CHAIN (base_binfo))
17526 : 85089564 : if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
17527 : 85088854 : TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
17528 : : else
17529 : : break;
17530 : : }
17531 : : }
17532 : :
17533 : :
17534 : : /* Copies the enum-related properties from type SRC to type DST.
17535 : : Used with the underlying type of an enum and the enum itself. */
17536 : : static void
17537 : 1696427 : copy_type_enum (tree dst, tree src)
17538 : : {
17539 : 1696427 : tree t;
17540 : 3392860 : for (t = dst; t; t = TYPE_NEXT_VARIANT (t))
17541 : : {
17542 : 1696433 : TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (src);
17543 : 1696433 : TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (src);
17544 : 1696433 : TYPE_SIZE (t) = TYPE_SIZE (src);
17545 : 1696433 : TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (src);
17546 : 1696433 : SET_TYPE_MODE (dst, TYPE_MODE (src));
17547 : 1696433 : TYPE_PRECISION (t) = TYPE_PRECISION (src);
17548 : 1696433 : unsigned valign = TYPE_ALIGN (src);
17549 : 1696433 : if (TYPE_USER_ALIGN (t))
17550 : 12 : valign = MAX (valign, TYPE_ALIGN (t));
17551 : : else
17552 : 1696421 : TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (src);
17553 : 1696433 : SET_TYPE_ALIGN (t, valign);
17554 : 1696433 : TYPE_UNSIGNED (t) = TYPE_UNSIGNED (src);
17555 : : }
17556 : 1696427 : }
17557 : :
17558 : : /* Begin compiling the definition of an enumeration type.
17559 : : NAME is its name,
17560 : :
17561 : : if ENUMTYPE is not NULL_TREE then the type has alredy been found.
17562 : :
17563 : : UNDERLYING_TYPE is the type that will be used as the storage for
17564 : : the enumeration type. This should be NULL_TREE if no storage type
17565 : : was specified.
17566 : :
17567 : : ATTRIBUTES are any attributes specified after the enum-key.
17568 : :
17569 : : SCOPED_ENUM_P is true if this is a scoped enumeration type.
17570 : :
17571 : : if IS_NEW is not NULL, gets TRUE iff a new type is created.
17572 : :
17573 : : Returns the type object, as yet incomplete.
17574 : : Also records info about it so that build_enumerator
17575 : : may be used to declare the individual values as they are read. */
17576 : :
17577 : : tree
17578 : 2009322 : start_enum (tree name, tree enumtype, tree underlying_type,
17579 : : tree attributes, bool scoped_enum_p, bool *is_new)
17580 : : {
17581 : 2009322 : tree prevtype = NULL_TREE;
17582 : 2009322 : gcc_assert (identifier_p (name));
17583 : :
17584 : 2009322 : if (is_new)
17585 : 1604512 : *is_new = false;
17586 : : /* [C++0x dcl.enum]p5:
17587 : :
17588 : : If not explicitly specified, the underlying type of a scoped
17589 : : enumeration type is int. */
17590 : 2009322 : if (!underlying_type && scoped_enum_p)
17591 : 113367 : underlying_type = integer_type_node;
17592 : :
17593 : 2009322 : if (underlying_type)
17594 : 410989 : underlying_type = cv_unqualified (underlying_type);
17595 : :
17596 : : /* If this is the real definition for a previous forward reference,
17597 : : fill in the contents in the same object that used to be the
17598 : : forward reference. */
17599 : 2009322 : if (!enumtype)
17600 : 2009191 : enumtype = lookup_and_check_tag (enum_type, name,
17601 : : /*tag_scope=*/TAG_how::CURRENT_ONLY,
17602 : : /*template_header_p=*/false);
17603 : :
17604 : : /* In case of a template_decl, the only check that should be deferred
17605 : : to instantiation time is the comparison of underlying types. */
17606 : 2009322 : if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
17607 : : {
17608 : : /* Attempt to set the declaring module. */
17609 : 33693 : if (modules_p ())
17610 : : {
17611 : 160 : tree decl = TYPE_NAME (enumtype);
17612 : 160 : if (!module_may_redeclare (decl))
17613 : 3 : enumtype = error_mark_node;
17614 : : else
17615 : 157 : set_instantiating_module (decl);
17616 : : }
17617 : :
17618 : 33693 : if (enumtype == error_mark_node)
17619 : : ;
17620 : 33880 : else if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
17621 : : {
17622 : 6 : auto_diagnostic_group d;
17623 : 6 : error_at (input_location, "scoped/unscoped mismatch "
17624 : : "in enum %q#T", enumtype);
17625 : 6 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
17626 : : "previous definition here");
17627 : 6 : enumtype = error_mark_node;
17628 : 6 : }
17629 : 33684 : else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
17630 : : {
17631 : 0 : auto_diagnostic_group d;
17632 : 0 : error_at (input_location, "underlying type mismatch "
17633 : : "in enum %q#T", enumtype);
17634 : 0 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
17635 : : "previous definition here");
17636 : 0 : enumtype = error_mark_node;
17637 : 0 : }
17638 : 33668 : else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
17639 : 67352 : && !same_type_p (underlying_type,
17640 : : ENUM_UNDERLYING_TYPE (enumtype)))
17641 : : {
17642 : 26 : auto_diagnostic_group d;
17643 : 26 : error_at (input_location, "different underlying type "
17644 : : "in enum %q#T", enumtype);
17645 : 26 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
17646 : : "previous definition here");
17647 : 26 : underlying_type = NULL_TREE;
17648 : 26 : }
17649 : : }
17650 : :
17651 : 2009322 : if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
17652 : 33684 : || processing_template_decl)
17653 : : {
17654 : : /* In case of error, make a dummy enum to allow parsing to
17655 : : continue. */
17656 : 1975726 : if (enumtype == error_mark_node)
17657 : : {
17658 : 9 : name = make_anon_name ();
17659 : 9 : enumtype = NULL_TREE;
17660 : : }
17661 : :
17662 : : /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
17663 : : of an opaque enum, or an opaque enum of an already defined
17664 : : enumeration (C++11).
17665 : : In any other case, it'll be NULL_TREE. */
17666 : 1975726 : if (!enumtype)
17667 : : {
17668 : 1975635 : if (is_new)
17669 : 1570828 : *is_new = true;
17670 : : }
17671 : 1975726 : prevtype = enumtype;
17672 : :
17673 : : /* Do not push the decl more than once. */
17674 : 1975726 : if (!enumtype
17675 : 91 : || TREE_CODE (enumtype) != ENUMERAL_TYPE)
17676 : : {
17677 : 1975638 : enumtype = cxx_make_type (ENUMERAL_TYPE);
17678 : 1975638 : enumtype = pushtag (name, enumtype);
17679 : :
17680 : 1975638 : if (enumtype != error_mark_node)
17681 : : {
17682 : : /* The enum is considered opaque until the opening '{' of the
17683 : : enumerator list. */
17684 : 1975620 : SET_OPAQUE_ENUM_P (enumtype, true);
17685 : 1975620 : ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
17686 : :
17687 : : /* std::byte aliases anything. */
17688 : 1975620 : if (TYPE_CONTEXT (enumtype) == std_node
17689 : 2288460 : && !strcmp ("byte", TYPE_NAME_STRING (enumtype)))
17690 : 12393 : TYPE_ALIAS_SET (enumtype) = 0;
17691 : : }
17692 : : }
17693 : : else
17694 : 88 : enumtype = xref_tag (enum_type, name);
17695 : :
17696 : 1975726 : if (enumtype == error_mark_node)
17697 : : return error_mark_node;
17698 : : }
17699 : :
17700 : 2009304 : SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
17701 : :
17702 : 2009304 : cplus_decl_attributes (&enumtype, attributes, (int)ATTR_FLAG_TYPE_IN_PLACE);
17703 : :
17704 : 2009304 : if (underlying_type)
17705 : : {
17706 : 410960 : if (ENUM_UNDERLYING_TYPE (enumtype))
17707 : : /* We already checked that it matches, don't change it to a different
17708 : : typedef variant. */;
17709 : 377318 : else if (CP_INTEGRAL_TYPE_P (underlying_type))
17710 : : {
17711 : 377254 : copy_type_enum (enumtype, underlying_type);
17712 : 377254 : ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
17713 : : }
17714 : 64 : else if (dependent_type_p (underlying_type))
17715 : 51 : ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
17716 : : else
17717 : : {
17718 : 13 : error ("underlying type %qT of %qT must be an integral type",
17719 : : underlying_type, enumtype);
17720 : 13 : ENUM_UNDERLYING_TYPE (enumtype) = integer_type_node;
17721 : : }
17722 : : }
17723 : :
17724 : : /* If into a template class, the returned enum is always the first
17725 : : declaration (opaque or not) seen. This way all the references to
17726 : : this type will be to the same declaration. The following ones are used
17727 : : only to check for definition errors. */
17728 : 2009304 : if (prevtype && processing_template_decl)
17729 : : return prevtype;
17730 : : else
17731 : 2009216 : return enumtype;
17732 : : }
17733 : :
17734 : : /* After processing and defining all the values of an enumeration type,
17735 : : install their decls in the enumeration type.
17736 : : ENUMTYPE is the type object. */
17737 : :
17738 : : void
17739 : 1912098 : finish_enum_value_list (tree enumtype)
17740 : : {
17741 : 1912098 : tree values;
17742 : 1912098 : tree underlying_type;
17743 : 1912098 : tree decl;
17744 : 1912098 : tree value;
17745 : 1912098 : tree minnode, maxnode;
17746 : 1912098 : tree t;
17747 : :
17748 : 1912098 : bool fixed_underlying_type_p
17749 : 1912098 : = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
17750 : :
17751 : : /* We built up the VALUES in reverse order. */
17752 : 1912098 : TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
17753 : :
17754 : : /* For an enum defined in a template, just set the type of the values;
17755 : : all further processing is postponed until the template is
17756 : : instantiated. We need to set the type so that tsubst of a CONST_DECL
17757 : : works. */
17758 : 1912098 : if (processing_template_decl)
17759 : : {
17760 : 348212 : for (values = TYPE_VALUES (enumtype);
17761 : 646244 : values;
17762 : 348212 : values = TREE_CHAIN (values))
17763 : 348212 : TREE_TYPE (TREE_VALUE (values)) = enumtype;
17764 : : return;
17765 : : }
17766 : :
17767 : : /* Determine the minimum and maximum values of the enumerators. */
17768 : 1614066 : if (TYPE_VALUES (enumtype))
17769 : : {
17770 : : minnode = maxnode = NULL_TREE;
17771 : :
17772 : 10252490 : for (values = TYPE_VALUES (enumtype);
17773 : 11839459 : values;
17774 : 10252490 : values = TREE_CHAIN (values))
17775 : : {
17776 : 10252490 : decl = TREE_VALUE (values);
17777 : :
17778 : : /* [dcl.enum]: Following the closing brace of an enum-specifier,
17779 : : each enumerator has the type of its enumeration. Prior to the
17780 : : closing brace, the type of each enumerator is the type of its
17781 : : initializing value. */
17782 : 10252490 : TREE_TYPE (decl) = enumtype;
17783 : :
17784 : : /* Update the minimum and maximum values, if appropriate. */
17785 : 10252490 : value = DECL_INITIAL (decl);
17786 : 10252490 : if (TREE_CODE (value) != INTEGER_CST)
17787 : 4 : value = integer_zero_node;
17788 : : /* Figure out what the minimum and maximum values of the
17789 : : enumerators are. */
17790 : 10252490 : if (!minnode)
17791 : : minnode = maxnode = value;
17792 : 8665521 : else if (tree_int_cst_lt (maxnode, value))
17793 : : maxnode = value;
17794 : 1324985 : else if (tree_int_cst_lt (value, minnode))
17795 : 141202 : minnode = value;
17796 : : }
17797 : : }
17798 : : else
17799 : : /* [dcl.enum]
17800 : :
17801 : : If the enumerator-list is empty, the underlying type is as if
17802 : : the enumeration had a single enumerator with value 0. */
17803 : 27097 : minnode = maxnode = integer_zero_node;
17804 : :
17805 : 1614066 : if (!fixed_underlying_type_p)
17806 : : {
17807 : : /* Compute the number of bits require to represent all values of the
17808 : : enumeration. We must do this before the type of MINNODE and
17809 : : MAXNODE are transformed, since tree_int_cst_min_precision relies
17810 : : on the TREE_TYPE of the value it is passed. */
17811 : 1319173 : signop sgn = tree_int_cst_sgn (minnode) >= 0 ? UNSIGNED : SIGNED;
17812 : 1319173 : int lowprec = tree_int_cst_min_precision (minnode, sgn);
17813 : 1319173 : int highprec = tree_int_cst_min_precision (maxnode, sgn);
17814 : 1319173 : int precision = MAX (lowprec, highprec);
17815 : 1319173 : unsigned int itk;
17816 : 1319173 : bool use_short_enum;
17817 : :
17818 : : /* Determine the underlying type of the enumeration.
17819 : :
17820 : : [dcl.enum]
17821 : :
17822 : : The underlying type of an enumeration is an integral type that
17823 : : can represent all the enumerator values defined in the
17824 : : enumeration. It is implementation-defined which integral type is
17825 : : used as the underlying type for an enumeration except that the
17826 : : underlying type shall not be larger than int unless the value of
17827 : : an enumerator cannot fit in an int or unsigned int.
17828 : :
17829 : : We use "int" or an "unsigned int" as the underlying type, even if
17830 : : a smaller integral type would work, unless the user has
17831 : : explicitly requested that we use the smallest possible type. The
17832 : : user can request that for all enumerations with a command line
17833 : : flag, or for just one enumeration with an attribute. */
17834 : :
17835 : 2638346 : use_short_enum = flag_short_enums
17836 : 1319173 : || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
17837 : :
17838 : : /* If the precision of the type was specified with an attribute and it
17839 : : was too small, give an error. Otherwise, use it. */
17840 : 1319173 : if (TYPE_PRECISION (enumtype))
17841 : : {
17842 : 11 : if (precision > TYPE_PRECISION (enumtype))
17843 : 0 : error ("specified mode too small for enumerated values");
17844 : : else
17845 : : {
17846 : 11 : use_short_enum = true;
17847 : 11 : precision = TYPE_PRECISION (enumtype);
17848 : : }
17849 : : }
17850 : :
17851 : 3882849 : for (itk = (use_short_enum ? itk_char : itk_int);
17852 : 2563755 : itk != itk_none;
17853 : : itk++)
17854 : : {
17855 : 2563752 : underlying_type = integer_types[itk];
17856 : 2563752 : if (underlying_type != NULL_TREE
17857 : 2563734 : && TYPE_PRECISION (underlying_type) >= precision
17858 : 5125571 : && TYPE_SIGN (underlying_type) == sgn)
17859 : : break;
17860 : : }
17861 : 1319173 : if (itk == itk_none)
17862 : : {
17863 : : /* DR 377
17864 : :
17865 : : IF no integral type can represent all the enumerator values, the
17866 : : enumeration is ill-formed. */
17867 : 3 : error ("no integral type can represent all of the enumerator values "
17868 : : "for %qT", enumtype);
17869 : 3 : precision = TYPE_PRECISION (long_long_integer_type_node);
17870 : 3 : underlying_type = integer_types[itk_unsigned_long_long];
17871 : : }
17872 : :
17873 : : /* [dcl.enum]
17874 : :
17875 : : The value of sizeof() applied to an enumeration type, an object
17876 : : of an enumeration type, or an enumerator, is the value of sizeof()
17877 : : applied to the underlying type. */
17878 : 1319173 : copy_type_enum (enumtype, underlying_type);
17879 : :
17880 : : /* Compute the minimum and maximum values for the type.
17881 : :
17882 : : [dcl.enum]
17883 : :
17884 : : For an enumeration where emin is the smallest enumerator and emax
17885 : : is the largest, the values of the enumeration are the values of the
17886 : : underlying type in the range bmin to bmax, where bmin and bmax are,
17887 : : respectively, the smallest and largest values of the smallest bit-
17888 : : field that can store emin and emax. */
17889 : :
17890 : : /* The middle-end currently assumes that types with TYPE_PRECISION
17891 : : narrower than their underlying type are suitably zero or sign
17892 : : extended to fill their mode. Similarly, it assumes that the front
17893 : : end assures that a value of a particular type must be within
17894 : : TYPE_MIN_VALUE and TYPE_MAX_VALUE.
17895 : :
17896 : : We used to set these fields based on bmin and bmax, but that led
17897 : : to invalid assumptions like optimizing away bounds checking. So
17898 : : now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
17899 : : TYPE_MAX_VALUE to the values for the mode above and only restrict
17900 : : the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
17901 : 1319173 : ENUM_UNDERLYING_TYPE (enumtype)
17902 : 1319173 : = build_distinct_type_copy (underlying_type);
17903 : 1319173 : TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
17904 : 1319173 : set_min_and_max_values_for_integral_type
17905 : 1319173 : (ENUM_UNDERLYING_TYPE (enumtype), precision, sgn);
17906 : :
17907 : : /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
17908 : 1319173 : if (flag_strict_enums)
17909 : 38 : set_min_and_max_values_for_integral_type (enumtype, precision, sgn);
17910 : :
17911 : 1319173 : if (use_short_enum)
17912 : : {
17913 : 79 : TYPE_PACKED (enumtype) = use_short_enum;
17914 : 79 : fixup_attribute_variants (enumtype);
17915 : : }
17916 : : }
17917 : : else
17918 : 294893 : underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
17919 : :
17920 : : /* If the enum is exported, mark the consts too. */
17921 : 1614066 : bool export_p = (UNSCOPED_ENUM_P (enumtype)
17922 : 1387224 : && DECL_MODULE_EXPORT_P (TYPE_STUB_DECL (enumtype))
17923 : 1614623 : && at_namespace_scope_p ());
17924 : :
17925 : : /* Convert each of the enumerators to the type of the underlying
17926 : : type of the enumeration. */
17927 : 11866556 : for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
17928 : : {
17929 : 10252490 : decl = TREE_VALUE (values);
17930 : 10252490 : iloc_sentinel ils (DECL_SOURCE_LOCATION (decl));
17931 : 10252490 : if (fixed_underlying_type_p)
17932 : : /* If the enumeration type has a fixed underlying type, we
17933 : : already checked all of the enumerator values. */
17934 : 2840308 : value = DECL_INITIAL (decl);
17935 : : else
17936 : 7412182 : value = perform_implicit_conversion (underlying_type,
17937 : 7412182 : DECL_INITIAL (decl),
17938 : : tf_warning_or_error);
17939 : : /* Do not clobber shared ints. */
17940 : 10252490 : if (value != error_mark_node)
17941 : : {
17942 : 10252488 : value = copy_node (value);
17943 : :
17944 : 10252488 : TREE_TYPE (value) = enumtype;
17945 : : }
17946 : 10252490 : DECL_INITIAL (decl) = value;
17947 : 10252490 : if (export_p)
17948 : 5158 : DECL_MODULE_EXPORT_P (decl) = true;
17949 : 10252490 : }
17950 : :
17951 : : /* Fix up all variant types of this enum type. */
17952 : 3228138 : for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
17953 : 1614072 : TYPE_VALUES (t) = TYPE_VALUES (enumtype);
17954 : :
17955 : 1614066 : if (at_class_scope_p ()
17956 : 886090 : && COMPLETE_TYPE_P (current_class_type)
17957 : 1614127 : && UNSCOPED_ENUM_P (enumtype))
17958 : : {
17959 : 42 : insert_late_enum_def_bindings (current_class_type, enumtype);
17960 : : /* TYPE_FIELDS needs fixup. */
17961 : 42 : fixup_type_variants (current_class_type);
17962 : : }
17963 : :
17964 : : /* Finish debugging output for this type. */
17965 : 1614066 : rest_of_type_compilation (enumtype, namespace_bindings_p ());
17966 : :
17967 : : /* Each enumerator now has the type of its enumeration. Clear the cache
17968 : : so that this change in types doesn't confuse us later on. */
17969 : 1614066 : clear_cv_and_fold_caches ();
17970 : : }
17971 : :
17972 : : /* Finishes the enum type. This is called only the first time an
17973 : : enumeration is seen, be it opaque or odinary.
17974 : : ENUMTYPE is the type object. */
17975 : :
17976 : : void
17977 : 1902113 : finish_enum (tree enumtype)
17978 : : {
17979 : 1902113 : if (processing_template_decl)
17980 : : {
17981 : 298060 : if (at_function_scope_p ())
17982 : 2338 : add_stmt (build_min (TAG_DEFN, enumtype));
17983 : 298060 : return;
17984 : : }
17985 : :
17986 : : /* If this is a forward declaration, there should not be any variants,
17987 : : though we can get a variant in the middle of an enum-specifier with
17988 : : wacky code like 'enum E { e = sizeof(const E*) };' */
17989 : 3208106 : gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
17990 : : && (TYPE_VALUES (enumtype)
17991 : : || !TYPE_NEXT_VARIANT (enumtype)));
17992 : : }
17993 : :
17994 : : /* Build and install a CONST_DECL for an enumeration constant of the
17995 : : enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
17996 : : Apply ATTRIBUTES if available. LOC is the location of NAME.
17997 : : Assignment of sequential values by default is handled here. */
17998 : :
17999 : : tree
18000 : 10600679 : build_enumerator (tree name, tree value, tree enumtype, tree attributes,
18001 : : location_t loc)
18002 : : {
18003 : 10600679 : tree decl;
18004 : 10600679 : tree context;
18005 : 10600679 : tree type;
18006 : :
18007 : : /* scalar_constant_value will pull out this expression, so make sure
18008 : : it's folded as appropriate.
18009 : :
18010 : : Creating a TARGET_EXPR in a template breaks when substituting, and
18011 : : here we would create it for instance when using a class prvalue with
18012 : : a user-defined conversion function. So don't use such a tree. We
18013 : : instantiate VALUE here to get errors about bad enumerators even in
18014 : : a template that does not get instantiated. */
18015 : 10600679 : if (processing_template_decl)
18016 : 348212 : value = maybe_fold_non_dependent_expr (value);
18017 : :
18018 : : /* If the VALUE was erroneous, pretend it wasn't there; that will
18019 : : result in the enum being assigned the next value in sequence. */
18020 : 10600679 : if (value == error_mark_node)
18021 : : value = NULL_TREE;
18022 : :
18023 : : /* Remove no-op casts from the value. */
18024 : 10600641 : if (value)
18025 : 8003467 : STRIP_TYPE_NOPS (value);
18026 : :
18027 : 10600679 : if (! processing_template_decl)
18028 : : {
18029 : : /* Validate and default VALUE. */
18030 : 10252467 : if (value != NULL_TREE)
18031 : : {
18032 : 4543871 : if (!ENUM_UNDERLYING_TYPE (enumtype))
18033 : : {
18034 : 2503417 : tree tmp_value = build_expr_type_conversion (WANT_INT | WANT_ENUM,
18035 : : value, true);
18036 : 2503417 : if (tmp_value)
18037 : 4543871 : value = tmp_value;
18038 : : }
18039 : 2040454 : else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
18040 : : (TREE_TYPE (value)))
18041 : 39 : value = perform_implicit_conversion_flags
18042 : 39 : (ENUM_UNDERLYING_TYPE (enumtype), value, tf_warning_or_error,
18043 : : LOOKUP_IMPLICIT | LOOKUP_NO_NARROWING);
18044 : :
18045 : 4543871 : if (value == error_mark_node)
18046 : : value = NULL_TREE;
18047 : :
18048 : 4543850 : if (value != NULL_TREE)
18049 : : {
18050 : 4543850 : if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
18051 : : (TREE_TYPE (value)))
18052 : : {
18053 : 17 : error_at (cp_expr_loc_or_input_loc (value),
18054 : : "enumerator value for %qD must have integral or "
18055 : : "unscoped enumeration type", name);
18056 : 17 : value = NULL_TREE;
18057 : : }
18058 : : else
18059 : : {
18060 : 4543833 : value = cxx_constant_value (value);
18061 : :
18062 : 4543833 : if (TREE_CODE (value) != INTEGER_CST)
18063 : : {
18064 : 50 : error ("enumerator value for %qD is not an integer "
18065 : : "constant", name);
18066 : 50 : value = NULL_TREE;
18067 : : }
18068 : : }
18069 : : }
18070 : : }
18071 : :
18072 : : /* Default based on previous value. */
18073 : 67 : if (value == NULL_TREE)
18074 : : {
18075 : 5708684 : if (TYPE_VALUES (enumtype))
18076 : : {
18077 : 5278409 : tree prev_value;
18078 : :
18079 : : /* C++03 7.2/4: If no initializer is specified for the first
18080 : : enumerator, the type is an unspecified integral
18081 : : type. Otherwise the type is the same as the type of the
18082 : : initializing value of the preceding enumerator unless the
18083 : : incremented value is not representable in that type, in
18084 : : which case the type is an unspecified integral type
18085 : : sufficient to contain the incremented value. */
18086 : 5278409 : prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
18087 : 5278409 : if (TREE_CODE (prev_value) != INTEGER_CST)
18088 : 2 : value = error_mark_node;
18089 : : else
18090 : : {
18091 : 5278407 : wi::overflow_type overflowed;
18092 : 5278407 : tree type = TREE_TYPE (prev_value);
18093 : 5278407 : signop sgn = TYPE_SIGN (type);
18094 : 5278407 : widest_int wi = wi::add (wi::to_widest (prev_value), 1, sgn,
18095 : 5278407 : &overflowed);
18096 : 5278407 : if (!overflowed)
18097 : : {
18098 : 5278407 : bool pos = !wi::neg_p (wi, sgn);
18099 : 5278407 : if (!wi::fits_to_tree_p (wi, type))
18100 : : {
18101 : : unsigned int itk;
18102 : 53 : for (itk = itk_int; itk != itk_none; itk++)
18103 : : {
18104 : 53 : type = integer_types[itk];
18105 : 53 : if (type != NULL_TREE
18106 : 53 : && (pos || !TYPE_UNSIGNED (type))
18107 : 106 : && wi::fits_to_tree_p (wi, type))
18108 : : break;
18109 : : }
18110 : 17 : if (type && cxx_dialect < cxx11
18111 : 6 : && itk > itk_unsigned_long)
18112 : 3 : pedwarn (input_location, OPT_Wlong_long,
18113 : : pos ? G_("\
18114 : : incremented enumerator value is too large for %<unsigned long%>") : G_("\
18115 : : incremented enumerator value is too large for %<long%>"));
18116 : : }
18117 : 5278407 : if (type == NULL_TREE)
18118 : 0 : overflowed = wi::OVF_UNKNOWN;
18119 : : else
18120 : 5278407 : value = wide_int_to_tree (type, wi);
18121 : : }
18122 : :
18123 : 5278407 : if (overflowed)
18124 : : {
18125 : 0 : error ("overflow in enumeration values at %qD", name);
18126 : 0 : value = error_mark_node;
18127 : : }
18128 : 5278407 : }
18129 : : }
18130 : : else
18131 : 430275 : value = integer_zero_node;
18132 : : }
18133 : :
18134 : : /* Remove no-op casts from the value. */
18135 : 10252467 : STRIP_TYPE_NOPS (value);
18136 : :
18137 : : /* If the underlying type of the enum is fixed, check whether
18138 : : the enumerator values fits in the underlying type. If it
18139 : : does not fit, the program is ill-formed [C++0x dcl.enum]. */
18140 : 10252467 : if (ENUM_UNDERLYING_TYPE (enumtype)
18141 : : && value
18142 : 10252467 : && TREE_CODE (value) == INTEGER_CST)
18143 : : {
18144 : 2840283 : if (!int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
18145 : 9 : error ("enumerator value %qE is outside the range of underlying "
18146 : 9 : "type %qT", value, ENUM_UNDERLYING_TYPE (enumtype));
18147 : :
18148 : : /* Convert the value to the appropriate type. */
18149 : 2840283 : value = fold_convert (ENUM_UNDERLYING_TYPE (enumtype), value);
18150 : : }
18151 : : }
18152 : :
18153 : : /* C++ associates enums with global, function, or class declarations. */
18154 : 10600679 : context = current_scope ();
18155 : :
18156 : : /* Build the actual enumeration constant. Note that the enumeration
18157 : : constants have the underlying type of the enum (if it is fixed)
18158 : : or the type of their initializer (if the underlying type of the
18159 : : enum is not fixed):
18160 : :
18161 : : [ C++0x dcl.enum ]
18162 : :
18163 : : If the underlying type is fixed, the type of each enumerator
18164 : : prior to the closing brace is the underlying type; if the
18165 : : initializing value of an enumerator cannot be represented by
18166 : : the underlying type, the program is ill-formed. If the
18167 : : underlying type is not fixed, the type of each enumerator is
18168 : : the type of its initializing value.
18169 : :
18170 : : If the underlying type is not fixed, it will be computed by
18171 : : finish_enum and we will reset the type of this enumerator. Of
18172 : : course, if we're processing a template, there may be no value. */
18173 : 10600679 : type = value ? TREE_TYPE (value) : NULL_TREE;
18174 : :
18175 : 10600679 : decl = build_decl (loc, CONST_DECL, name, type);
18176 : :
18177 : 10600679 : DECL_CONTEXT (decl) = enumtype;
18178 : 10600679 : TREE_CONSTANT (decl) = 1;
18179 : 10600679 : TREE_READONLY (decl) = 1;
18180 : 10600679 : DECL_INITIAL (decl) = value;
18181 : :
18182 : 10600679 : if (attributes)
18183 : 42593 : cplus_decl_attributes (&decl, attributes, 0);
18184 : :
18185 : 10600679 : if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
18186 : : {
18187 : : /* In something like `struct S { enum E { i = 7 }; };' we put `i'
18188 : : on the TYPE_FIELDS list for `S'. (That's so that you can say
18189 : : things like `S::i' later.) */
18190 : :
18191 : : /* The enumerator may be getting declared outside of its enclosing
18192 : : class, like so:
18193 : :
18194 : : class S { public: enum E : int; }; enum S::E : int { i = 7; };
18195 : :
18196 : : For which case we need to make sure that the access of `S::i'
18197 : : matches the access of `S::E'. */
18198 : 1879008 : auto cas = make_temp_override (current_access_specifier);
18199 : 1879008 : set_current_access_from_decl (TYPE_NAME (enumtype));
18200 : 1879008 : finish_member_declaration (decl);
18201 : 1879008 : }
18202 : : else
18203 : 8721671 : pushdecl (decl);
18204 : :
18205 : : /* Add this enumeration constant to the list for this type. */
18206 : 10600679 : TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
18207 : :
18208 : 10600679 : return decl;
18209 : : }
18210 : :
18211 : : /* Look for an enumerator with the given NAME within the enumeration
18212 : : type ENUMTYPE. This routine is used primarily for qualified name
18213 : : lookup into an enumerator in C++0x, e.g.,
18214 : :
18215 : : enum class Color { Red, Green, Blue };
18216 : :
18217 : : Color color = Color::Red;
18218 : :
18219 : : Returns the value corresponding to the enumerator, or
18220 : : NULL_TREE if no such enumerator was found. */
18221 : : tree
18222 : 7230586 : lookup_enumerator (tree enumtype, tree name)
18223 : : {
18224 : 7230586 : tree e;
18225 : 7230586 : gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
18226 : :
18227 : 7230586 : e = purpose_member (name, TYPE_VALUES (enumtype));
18228 : 14461076 : return e? TREE_VALUE (e) : NULL_TREE;
18229 : : }
18230 : :
18231 : : /* Implement LANG_HOOKS_SIMULATE_ENUM_DECL. */
18232 : :
18233 : : tree
18234 : 0 : cxx_simulate_enum_decl (location_t loc, const char *name,
18235 : : vec<string_int_pair> *values)
18236 : : {
18237 : 0 : location_t saved_loc = input_location;
18238 : 0 : input_location = loc;
18239 : :
18240 : 0 : tree enumtype = start_enum (get_identifier (name), NULL_TREE, NULL_TREE,
18241 : : NULL_TREE, false, NULL);
18242 : 0 : if (!OPAQUE_ENUM_P (enumtype))
18243 : : {
18244 : 0 : auto_diagnostic_group d;
18245 : 0 : error_at (loc, "multiple definition of %q#T", enumtype);
18246 : 0 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
18247 : : "previous definition here");
18248 : 0 : return enumtype;
18249 : 0 : }
18250 : 0 : SET_OPAQUE_ENUM_P (enumtype, false);
18251 : 0 : DECL_SOURCE_LOCATION (TYPE_NAME (enumtype)) = loc;
18252 : :
18253 : 0 : for (const string_int_pair &value : values)
18254 : 0 : build_enumerator (get_identifier (value.first),
18255 : 0 : build_int_cst (integer_type_node, value.second),
18256 : : enumtype, NULL_TREE, loc);
18257 : :
18258 : 0 : finish_enum_value_list (enumtype);
18259 : 0 : finish_enum (enumtype);
18260 : :
18261 : 0 : input_location = saved_loc;
18262 : 0 : return enumtype;
18263 : : }
18264 : :
18265 : : /* Implement LANG_HOOKS_SIMULATE_RECORD_DECL. */
18266 : :
18267 : : tree
18268 : 0 : cxx_simulate_record_decl (location_t loc, const char *name,
18269 : : array_slice<const tree> fields)
18270 : : {
18271 : 0 : iloc_sentinel ils (loc);
18272 : :
18273 : 0 : tree ident = get_identifier (name);
18274 : 0 : tree type = xref_tag (/*tag_code=*/record_type, ident);
18275 : 0 : if (type != error_mark_node
18276 : 0 : && (TREE_CODE (type) != RECORD_TYPE || COMPLETE_TYPE_P (type)))
18277 : : {
18278 : 0 : error ("redefinition of %q#T", type);
18279 : 0 : type = error_mark_node;
18280 : : }
18281 : 0 : if (type == error_mark_node)
18282 : 0 : return lhd_simulate_record_decl (loc, name, fields);
18283 : :
18284 : 0 : xref_basetypes (type, NULL_TREE);
18285 : 0 : type = begin_class_definition (type);
18286 : 0 : if (type == error_mark_node)
18287 : 0 : return lhd_simulate_record_decl (loc, name, fields);
18288 : :
18289 : 0 : for (tree field : fields)
18290 : 0 : finish_member_declaration (field);
18291 : :
18292 : 0 : type = finish_struct (type, NULL_TREE);
18293 : :
18294 : 0 : tree decl = build_decl (loc, TYPE_DECL, ident, type);
18295 : 0 : set_underlying_type (decl);
18296 : 0 : lang_hooks.decls.pushdecl (decl);
18297 : :
18298 : 0 : return type;
18299 : 0 : }
18300 : :
18301 : : /* We're defining DECL. Make sure that its type is OK. */
18302 : :
18303 : : static void
18304 : 136360309 : check_function_type (tree decl, tree current_function_parms)
18305 : : {
18306 : 136360309 : tree fntype = TREE_TYPE (decl);
18307 : 136360309 : tree return_type = complete_type (TREE_TYPE (fntype));
18308 : :
18309 : : /* In a function definition, arg types must be complete. */
18310 : 136360309 : require_complete_types_for_parms (current_function_parms);
18311 : :
18312 : 136360309 : if (dependent_type_p (return_type)
18313 : 136360309 : || type_uses_auto (return_type))
18314 : 41041597 : return;
18315 : 95318712 : if (!COMPLETE_OR_VOID_TYPE_P (return_type))
18316 : : {
18317 : 12 : tree args = TYPE_ARG_TYPES (fntype);
18318 : :
18319 : 12 : error ("return type %q#T is incomplete", return_type);
18320 : :
18321 : : /* Make it return void instead. */
18322 : 12 : if (TREE_CODE (fntype) == METHOD_TYPE)
18323 : 3 : fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
18324 : : void_type_node,
18325 : 3 : TREE_CHAIN (args));
18326 : : else
18327 : 9 : fntype = build_function_type (void_type_node, args);
18328 : 12 : fntype = (cp_build_type_attribute_variant
18329 : 12 : (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
18330 : 12 : fntype = cxx_copy_lang_qualifiers (fntype, TREE_TYPE (decl));
18331 : 12 : TREE_TYPE (decl) = fntype;
18332 : : }
18333 : : else
18334 : : {
18335 : 95318700 : abstract_virtuals_error (decl, TREE_TYPE (fntype));
18336 : 95318700 : maybe_warn_parm_abi (TREE_TYPE (fntype),
18337 : 95318700 : DECL_SOURCE_LOCATION (decl));
18338 : : }
18339 : : }
18340 : :
18341 : : /* True iff FN is an implicitly-defined default constructor. */
18342 : :
18343 : : static bool
18344 : 4556000 : implicit_default_ctor_p (tree fn)
18345 : : {
18346 : 4556000 : return (DECL_CONSTRUCTOR_P (fn)
18347 : 4556000 : && !user_provided_p (fn)
18348 : 5175799 : && sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (fn)));
18349 : : }
18350 : :
18351 : : /* Clobber the contents of *this to let the back end know that the object
18352 : : storage is dead when we enter the constructor or leave the destructor. */
18353 : :
18354 : : static tree
18355 : 5411811 : build_clobber_this (clobber_kind kind)
18356 : : {
18357 : : /* Clobbering an empty base is pointless, and harmful if its one byte
18358 : : TYPE_SIZE overlays real data. */
18359 : 5411811 : if (is_empty_class (current_class_type))
18360 : 0 : return void_node;
18361 : :
18362 : : /* If we have virtual bases, clobber the whole object, but only if we're in
18363 : : charge. If we don't have virtual bases, clobber the as-base type so we
18364 : : don't mess with tail padding. */
18365 : 5411811 : bool vbases = CLASSTYPE_VBASECLASSES (current_class_type);
18366 : :
18367 : 5411811 : tree ctype = current_class_type;
18368 : 5411811 : if (!vbases)
18369 : 5395099 : ctype = CLASSTYPE_AS_BASE (ctype);
18370 : :
18371 : 5411811 : tree clobber = build_clobber (ctype, kind);
18372 : :
18373 : 5411811 : tree thisref = current_class_ref;
18374 : 5411811 : if (ctype != current_class_type)
18375 : : {
18376 : 592939 : thisref = build_nop (build_reference_type (ctype), current_class_ptr);
18377 : 592939 : thisref = convert_from_reference (thisref);
18378 : : }
18379 : :
18380 : 5411811 : tree exprstmt = build2 (MODIFY_EXPR, void_type_node, thisref, clobber);
18381 : 5411811 : if (vbases)
18382 : 16712 : exprstmt = build_if_in_charge (exprstmt);
18383 : :
18384 : : return exprstmt;
18385 : : }
18386 : :
18387 : : /* Create the FUNCTION_DECL for a function definition.
18388 : : DECLSPECS and DECLARATOR are the parts of the declaration;
18389 : : they describe the function's name and the type it returns,
18390 : : but twisted together in a fashion that parallels the syntax of C.
18391 : :
18392 : : FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
18393 : : DECLARATOR is really the DECL for the function we are about to
18394 : : process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
18395 : : indicating that the function is an inline defined in-class.
18396 : :
18397 : : This function creates a binding context for the function body
18398 : : as well as setting up the FUNCTION_DECL in current_function_decl.
18399 : :
18400 : : For C++, we must first check whether that datum makes any sense.
18401 : : For example, "class A local_a(1,2);" means that variable local_a
18402 : : is an aggregate of type A, which should have a constructor
18403 : : applied to it with the argument list [1, 2].
18404 : :
18405 : : On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
18406 : : or may be a BLOCK if the function has been defined previously
18407 : : in this translation unit. On exit, DECL_INITIAL (decl1) will be
18408 : : error_mark_node if the function has never been defined, or
18409 : : a BLOCK if the function has been defined somewhere. */
18410 : :
18411 : : bool
18412 : 136360345 : start_preparsed_function (tree decl1, tree attrs, int flags)
18413 : : {
18414 : 136360345 : tree ctype = NULL_TREE;
18415 : 136360345 : bool doing_friend = false;
18416 : :
18417 : : /* Sanity check. */
18418 : 136360345 : gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node)));
18419 : 136360345 : gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
18420 : :
18421 : 136360345 : tree fntype = TREE_TYPE (decl1);
18422 : 136360345 : if (DECL_CLASS_SCOPE_P (decl1))
18423 : 98332893 : ctype = DECL_CONTEXT (decl1);
18424 : : else
18425 : : {
18426 : 76054904 : ctype = DECL_FRIEND_CONTEXT (decl1);
18427 : :
18428 : 38027451 : if (ctype)
18429 : 136360345 : doing_friend = true;
18430 : : }
18431 : :
18432 : : /* Adjust for #pragma target/optimize if this is an artificial function that
18433 : : (probably) didn't go through grokfndecl. We particularly don't want this
18434 : : for deferred instantiations, which should match their template. */
18435 : 136360345 : if (DECL_ARTIFICIAL (decl1))
18436 : 2738048 : decl_attributes (&decl1, NULL_TREE, 0);
18437 : :
18438 : 136360345 : if (DECL_DECLARED_INLINE_P (decl1)
18439 : 136360345 : && lookup_attribute ("noinline", attrs))
18440 : : {
18441 : 0 : auto_urlify_attributes sentinel;
18442 : 0 : warning_at (DECL_SOURCE_LOCATION (decl1), 0,
18443 : : "inline function %qD given attribute %qs", decl1, "noinline");
18444 : 0 : }
18445 : :
18446 : : /* Handle gnu_inline attribute. */
18447 : 136360345 : if (GNU_INLINE_P (decl1))
18448 : : {
18449 : 1549267 : DECL_EXTERNAL (decl1) = 1;
18450 : 1549267 : DECL_NOT_REALLY_EXTERN (decl1) = 0;
18451 : 1549267 : DECL_INTERFACE_KNOWN (decl1) = 1;
18452 : 1549267 : DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
18453 : : }
18454 : :
18455 : 136360345 : if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
18456 : : /* This is a constructor, we must ensure that any default args
18457 : : introduced by this definition are propagated to the clones
18458 : : now. The clones are used directly in overload resolution. */
18459 : 17884091 : adjust_clone_args (decl1);
18460 : :
18461 : : /* Sometimes we don't notice that a function is a static member, and
18462 : : build a METHOD_TYPE for it. Fix that up now. */
18463 : 136360345 : gcc_assert (!(DECL_STATIC_FUNCTION_P (decl1)
18464 : : && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE));
18465 : :
18466 : : /* Set up current_class_type, and enter the scope of the class, if
18467 : : appropriate. */
18468 : 136360345 : if (ctype)
18469 : 100896788 : push_nested_class (ctype);
18470 : :
18471 : : /* Now that we have entered the scope of the class, we must restore
18472 : : the bindings for any template parameters surrounding DECL1, if it
18473 : : is an inline member template. (Order is important; consider the
18474 : : case where a template parameter has the same name as a field of
18475 : : the class.) It is not until after this point that
18476 : : PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
18477 : 136360345 : if (flags & SF_INCLASS_INLINE)
18478 : 66414831 : maybe_begin_member_template_processing (decl1);
18479 : :
18480 : : /* Effective C++ rule 15. */
18481 : 136360345 : if (warn_ecpp
18482 : 123 : && DECL_ASSIGNMENT_OPERATOR_P (decl1)
18483 : 30 : && DECL_OVERLOADED_OPERATOR_IS (decl1, NOP_EXPR)
18484 : 136360375 : && VOID_TYPE_P (TREE_TYPE (fntype)))
18485 : 0 : warning (OPT_Weffc__,
18486 : : "%<operator=%> should return a reference to %<*this%>");
18487 : :
18488 : : /* Make the init_value nonzero so pushdecl knows this is not tentative.
18489 : : error_mark_node is replaced below (in poplevel) with the BLOCK. */
18490 : 136360345 : if (!DECL_INITIAL (decl1))
18491 : 28322549 : DECL_INITIAL (decl1) = error_mark_node;
18492 : :
18493 : : /* This function exists in static storage.
18494 : : (This does not mean `static' in the C sense!) */
18495 : 136360345 : TREE_STATIC (decl1) = 1;
18496 : :
18497 : : /* We must call push_template_decl after current_class_type is set
18498 : : up. (If we are processing inline definitions after exiting a
18499 : : class scope, current_class_type will be NULL_TREE until set above
18500 : : by push_nested_class.) */
18501 : 136360345 : if (processing_template_decl)
18502 : : {
18503 : 82209752 : tree newdecl1 = push_template_decl (decl1, doing_friend);
18504 : 82209752 : if (newdecl1 == error_mark_node)
18505 : : {
18506 : 36 : if (ctype)
18507 : 9 : pop_nested_class ();
18508 : 36 : return false;
18509 : : }
18510 : 82209716 : decl1 = newdecl1;
18511 : : }
18512 : :
18513 : : /* Make sure the parameter and return types are reasonable. When
18514 : : you declare a function, these types can be incomplete, but they
18515 : : must be complete when you define the function. */
18516 : 136360309 : check_function_type (decl1, DECL_ARGUMENTS (decl1));
18517 : :
18518 : : /* Build the return declaration for the function. */
18519 : 136360309 : tree restype = TREE_TYPE (fntype);
18520 : :
18521 : 136360309 : if (DECL_RESULT (decl1) == NULL_TREE)
18522 : : {
18523 : : /* In a template instantiation, copy the return type location. When
18524 : : parsing, the location will be set in grokdeclarator. */
18525 : 53815284 : location_t loc = input_location;
18526 : 53815284 : if (DECL_TEMPLATE_INSTANTIATION (decl1))
18527 : : {
18528 : 25397699 : tree tmpl = template_for_substitution (decl1);
18529 : 25397699 : if (tree res = DECL_RESULT (DECL_TEMPLATE_RESULT (tmpl)))
18530 : 24411972 : loc = DECL_SOURCE_LOCATION (res);
18531 : : }
18532 : :
18533 : 53815284 : tree resdecl = build_decl (loc, RESULT_DECL, 0, restype);
18534 : 53815284 : DECL_ARTIFICIAL (resdecl) = 1;
18535 : 53815284 : DECL_IGNORED_P (resdecl) = 1;
18536 : 53815284 : DECL_RESULT (decl1) = resdecl;
18537 : :
18538 : 53815284 : cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
18539 : : }
18540 : :
18541 : : /* Record the decl so that the function name is defined.
18542 : : If we already have a decl for this name, and it is a FUNCTION_DECL,
18543 : : use the old decl. */
18544 : 136360309 : if (!processing_template_decl && !(flags & SF_PRE_PARSED))
18545 : : {
18546 : : /* A specialization is not used to guide overload resolution. */
18547 : 19429134 : if (!DECL_FUNCTION_MEMBER_P (decl1)
18548 : 19416326 : && !(DECL_USE_TEMPLATE (decl1) &&
18549 : 573 : PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
18550 : : {
18551 : 9320793 : tree olddecl = pushdecl (decl1);
18552 : :
18553 : 9320793 : if (olddecl == error_mark_node)
18554 : : /* If something went wrong when registering the declaration,
18555 : : use DECL1; we have to have a FUNCTION_DECL to use when
18556 : : parsing the body of the function. */
18557 : : ;
18558 : : else
18559 : : {
18560 : : /* Otherwise, OLDDECL is either a previous declaration
18561 : : of the same function or DECL1 itself. */
18562 : :
18563 : 9320580 : if (warn_missing_declarations
18564 : 21 : && olddecl == decl1
18565 : 15 : && !DECL_MAIN_P (decl1)
18566 : 15 : && TREE_PUBLIC (decl1)
18567 : 9320592 : && !DECL_DECLARED_INLINE_P (decl1))
18568 : : {
18569 : 9 : tree context;
18570 : :
18571 : : /* Check whether DECL1 is in an anonymous
18572 : : namespace. */
18573 : 9 : for (context = DECL_CONTEXT (decl1);
18574 : 18 : context;
18575 : 9 : context = DECL_CONTEXT (context))
18576 : : {
18577 : 12 : if (TREE_CODE (context) == NAMESPACE_DECL
18578 : 12 : && DECL_NAME (context) == NULL_TREE)
18579 : : break;
18580 : : }
18581 : :
18582 : 9 : if (context == NULL)
18583 : 6 : warning_at (DECL_SOURCE_LOCATION (decl1),
18584 : : OPT_Wmissing_declarations,
18585 : : "no previous declaration for %qD", decl1);
18586 : : }
18587 : :
18588 : 9320580 : decl1 = olddecl;
18589 : : }
18590 : : }
18591 : : else
18592 : : {
18593 : : /* We need to set the DECL_CONTEXT. */
18594 : 774167 : if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
18595 : 0 : DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
18596 : : }
18597 : 10094960 : fntype = TREE_TYPE (decl1);
18598 : 10094960 : restype = TREE_TYPE (fntype);
18599 : :
18600 : : /* If #pragma weak applies, mark the decl appropriately now.
18601 : : The pragma only applies to global functions. Because
18602 : : determining whether or not the #pragma applies involves
18603 : : computing the mangled name for the declaration, we cannot
18604 : : apply the pragma until after we have merged this declaration
18605 : : with any previous declarations; if the original declaration
18606 : : has a linkage specification, that specification applies to
18607 : : the definition as well, and may affect the mangled name. */
18608 : 10094960 : if (DECL_FILE_SCOPE_P (decl1))
18609 : 2304512 : maybe_apply_pragma_weak (decl1);
18610 : : }
18611 : :
18612 : : /* We are now in the scope of the function being defined. */
18613 : 136360309 : current_function_decl = decl1;
18614 : :
18615 : : /* Save the parm names or decls from this function's declarator
18616 : : where store_parm_decls will find them. */
18617 : 136360309 : tree current_function_parms = DECL_ARGUMENTS (decl1);
18618 : :
18619 : : /* Let the user know we're compiling this function. */
18620 : 136360309 : announce_function (decl1);
18621 : :
18622 : 136360309 : gcc_assert (DECL_INITIAL (decl1));
18623 : :
18624 : : /* This function may already have been parsed, in which case just
18625 : : return; our caller will skip over the body without parsing. */
18626 : 136360309 : if (DECL_INITIAL (decl1) != error_mark_node)
18627 : : return true;
18628 : :
18629 : : /* Initialize RTL machinery. We cannot do this until
18630 : : CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
18631 : : even when processing a template; this is how we get
18632 : : CFUN set up, and our per-function variables initialized.
18633 : : FIXME factor out the non-RTL stuff. */
18634 : 136360309 : cp_binding_level *bl = current_binding_level;
18635 : 136360309 : allocate_struct_function (decl1, processing_template_decl);
18636 : :
18637 : : /* Initialize the language data structures. Whenever we start
18638 : : a new function, we destroy temporaries in the usual way. */
18639 : 136360309 : cfun->language = ggc_cleared_alloc<language_function> ();
18640 : 136360309 : current_stmt_tree ()->stmts_are_full_exprs_p = 1;
18641 : 136360309 : current_binding_level = bl;
18642 : :
18643 : : /* If we are (erroneously) defining a function that we have already
18644 : : defined before, wipe out what we knew before. */
18645 : 136360309 : gcc_checking_assert (!DECL_PENDING_INLINE_P (decl1));
18646 : 136360309 : FNDECL_USED_AUTO (decl1) = false;
18647 : 136360309 : DECL_SAVED_AUTO_RETURN_TYPE (decl1) = NULL;
18648 : :
18649 : 136360309 : if (!processing_template_decl && type_uses_auto (restype))
18650 : : {
18651 : 733489 : FNDECL_USED_AUTO (decl1) = true;
18652 : 733489 : DECL_SAVED_AUTO_RETURN_TYPE (decl1) = restype;
18653 : : }
18654 : :
18655 : : /* Start the statement-tree, start the tree now. */
18656 : 136360309 : DECL_SAVED_TREE (decl1) = push_stmt_list ();
18657 : :
18658 : 136360309 : if (DECL_IOBJ_MEMBER_FUNCTION_P (decl1))
18659 : : {
18660 : : /* We know that this was set up by `grokclassfn'. We do not
18661 : : wait until `store_parm_decls', since evil parse errors may
18662 : : never get us to that point. Here we keep the consistency
18663 : : between `current_class_type' and `current_class_ptr'. */
18664 : 87958295 : tree t = DECL_ARGUMENTS (decl1);
18665 : :
18666 : 87958295 : gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
18667 : 87958295 : gcc_assert (TYPE_PTR_P (TREE_TYPE (t)));
18668 : :
18669 : 87958295 : cp_function_chain->x_current_class_ref
18670 : 87958295 : = cp_build_fold_indirect_ref (t);
18671 : : /* Set this second to avoid shortcut in cp_build_indirect_ref. */
18672 : 87958295 : cp_function_chain->x_current_class_ptr = t;
18673 : :
18674 : : /* Constructors and destructors need to know whether they're "in
18675 : : charge" of initializing virtual base classes. */
18676 : 87958295 : t = DECL_CHAIN (t);
18677 : 87958295 : if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
18678 : : {
18679 : 18799 : current_in_charge_parm = t;
18680 : 18799 : t = DECL_CHAIN (t);
18681 : : }
18682 : 87958295 : if (DECL_HAS_VTT_PARM_P (decl1))
18683 : : {
18684 : 37611 : gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
18685 : 37611 : current_vtt_parm = t;
18686 : : }
18687 : : }
18688 : :
18689 : 136360309 : bool honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
18690 : : /* Implicitly-defined methods (like the
18691 : : destructor for a class in which no destructor
18692 : : is explicitly declared) must not be defined
18693 : : until their definition is needed. So, we
18694 : : ignore interface specifications for
18695 : : compiler-generated functions. */
18696 : 136360309 : && !DECL_ARTIFICIAL (decl1));
18697 : 136360309 : struct c_fileinfo *finfo
18698 : 136360309 : = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
18699 : :
18700 : 136360309 : if (processing_template_decl)
18701 : : /* Don't mess with interface flags. */;
18702 : 54150593 : else if (DECL_INTERFACE_KNOWN (decl1))
18703 : : {
18704 : 16850864 : tree ctx = decl_function_context (decl1);
18705 : :
18706 : 16850864 : if (DECL_NOT_REALLY_EXTERN (decl1))
18707 : 13484331 : DECL_EXTERNAL (decl1) = 0;
18708 : :
18709 : 16850864 : if (ctx != NULL_TREE && vague_linkage_p (ctx))
18710 : : /* This is a function in a local class in an extern inline
18711 : : or template function. */
18712 : 2651412 : comdat_linkage (decl1);
18713 : : }
18714 : : /* If this function belongs to an interface, it is public.
18715 : : If it belongs to someone else's interface, it is also external.
18716 : : This only affects inlines and template instantiations. */
18717 : 37299729 : else if (!finfo->interface_unknown && honor_interface)
18718 : : {
18719 : 112 : if (DECL_DECLARED_INLINE_P (decl1)
18720 : 112 : || DECL_TEMPLATE_INSTANTIATION (decl1))
18721 : : {
18722 : 88 : DECL_EXTERNAL (decl1)
18723 : 176 : = (finfo->interface_only
18724 : 88 : || (DECL_DECLARED_INLINE_P (decl1)
18725 : 42 : && ! flag_implement_inlines
18726 : 0 : && !DECL_VINDEX (decl1)));
18727 : :
18728 : : /* For WIN32 we also want to put these in linkonce sections. */
18729 : 88 : maybe_make_one_only (decl1);
18730 : : }
18731 : : else
18732 : 24 : DECL_EXTERNAL (decl1) = 0;
18733 : 112 : DECL_INTERFACE_KNOWN (decl1) = 1;
18734 : : /* If this function is in an interface implemented in this file,
18735 : : make sure that the back end knows to emit this function
18736 : : here. */
18737 : 112 : if (!DECL_EXTERNAL (decl1))
18738 : 66 : mark_needed (decl1);
18739 : : }
18740 : 37299617 : else if (finfo->interface_unknown && finfo->interface_only
18741 : 0 : && honor_interface)
18742 : : {
18743 : : /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
18744 : : interface, we will have both finfo->interface_unknown and
18745 : : finfo->interface_only set. In that case, we don't want to
18746 : : use the normal heuristics because someone will supply a
18747 : : #pragma implementation elsewhere, and deducing it here would
18748 : : produce a conflict. */
18749 : 0 : comdat_linkage (decl1);
18750 : 0 : DECL_EXTERNAL (decl1) = 0;
18751 : 0 : DECL_INTERFACE_KNOWN (decl1) = 1;
18752 : 0 : DECL_DEFER_OUTPUT (decl1) = 1;
18753 : : }
18754 : : else
18755 : : {
18756 : : /* This is a definition, not a reference.
18757 : : So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
18758 : 37299617 : if (!GNU_INLINE_P (decl1))
18759 : 37299614 : DECL_EXTERNAL (decl1) = 0;
18760 : :
18761 : 37299617 : if ((DECL_DECLARED_INLINE_P (decl1)
18762 : 2018281 : || DECL_TEMPLATE_INSTANTIATION (decl1))
18763 : 39088747 : && ! DECL_INTERFACE_KNOWN (decl1))
18764 : 37070466 : DECL_DEFER_OUTPUT (decl1) = 1;
18765 : : else
18766 : 229151 : DECL_INTERFACE_KNOWN (decl1) = 1;
18767 : : }
18768 : :
18769 : : /* Determine the ELF visibility attribute for the function. We must not
18770 : : do this before calling "pushdecl", as we must allow "duplicate_decls"
18771 : : to merge any attributes appropriately. We also need to wait until
18772 : : linkage is set. */
18773 : 136360309 : if (!DECL_CLONED_FUNCTION_P (decl1))
18774 : 123019732 : determine_visibility (decl1);
18775 : :
18776 : 136360309 : if (!processing_template_decl)
18777 : 54150593 : maybe_instantiate_noexcept (decl1);
18778 : :
18779 : 136360309 : begin_scope (sk_function_parms, decl1);
18780 : :
18781 : 136360309 : ++function_depth;
18782 : :
18783 : 136360309 : start_fname_decls ();
18784 : :
18785 : 136360309 : store_parm_decls (current_function_parms);
18786 : :
18787 : 136360309 : start_function_contracts (decl1);
18788 : :
18789 : 136360309 : if (!processing_template_decl
18790 : 54150593 : && (flag_lifetime_dse > 1)
18791 : 108283382 : && DECL_CONSTRUCTOR_P (decl1)
18792 : 15286140 : && !DECL_CLONED_FUNCTION_P (decl1)
18793 : : /* Clobbering an empty base is harmful if it overlays real data. */
18794 : 5092694 : && !is_empty_class (current_class_type)
18795 : : /* We can't clobber safely for an implicitly-defined default constructor
18796 : : because part of the initialization might happen before we enter the
18797 : : constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
18798 : 140915720 : && !implicit_default_ctor_p (decl1))
18799 : 4156959 : finish_expr_stmt (build_clobber_this (CLOBBER_OBJECT_BEGIN));
18800 : :
18801 : 136360309 : if (!processing_template_decl
18802 : 108301186 : && DECL_CONSTRUCTOR_P (decl1)
18803 : 15288702 : && sanitize_flags_p (SANITIZE_VPTR)
18804 : 1767 : && !DECL_CLONED_FUNCTION_P (decl1)
18805 : 136360898 : && !implicit_default_ctor_p (decl1))
18806 : 441 : cp_ubsan_maybe_initialize_vtbl_ptrs (current_class_ptr);
18807 : :
18808 : 136360309 : if (!DECL_OMP_DECLARE_REDUCTION_P (decl1))
18809 : 136359741 : start_lambda_scope (decl1);
18810 : :
18811 : : return true;
18812 : : }
18813 : :
18814 : :
18815 : : /* Like start_preparsed_function, except that instead of a
18816 : : FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
18817 : :
18818 : : Returns true on success. If the DECLARATOR is not suitable
18819 : : for a function, we return false, which tells the parser to
18820 : : skip the entire function. */
18821 : :
18822 : : bool
18823 : 37758245 : start_function (cp_decl_specifier_seq *declspecs,
18824 : : const cp_declarator *declarator,
18825 : : tree attrs)
18826 : : {
18827 : 37758245 : tree decl1;
18828 : :
18829 : 37758245 : decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
18830 : 37758245 : invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION, decl1);
18831 : 37758245 : if (decl1 == error_mark_node)
18832 : : return false;
18833 : :
18834 : 37757956 : if (DECL_MAIN_P (decl1))
18835 : : /* main must return int. grokfndecl should have corrected it
18836 : : (and issued a diagnostic) if the user got it wrong. */
18837 : 32503 : gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
18838 : : integer_type_node));
18839 : :
18840 : 37757956 : return start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
18841 : : }
18842 : :
18843 : : /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
18844 : : FN. */
18845 : :
18846 : : bool
18847 : 260770909 : use_eh_spec_block (tree fn)
18848 : : {
18849 : 258881295 : return (flag_exceptions && flag_enforce_eh_specs
18850 : 258881295 : && !processing_template_decl
18851 : : /* We insert the EH_SPEC_BLOCK only in the original
18852 : : function; then, it is copied automatically to the
18853 : : clones. */
18854 : 94074179 : && !DECL_CLONED_FUNCTION_P (fn)
18855 : : /* Implicitly-generated constructors and destructors have
18856 : : exception specifications. However, those specifications
18857 : : are the union of the possible exceptions specified by the
18858 : : constructors/destructors for bases and members, so no
18859 : : unallowed exception will ever reach this function. By
18860 : : not creating the EH_SPEC_BLOCK we save a little memory,
18861 : : and we avoid spurious warnings about unreachable
18862 : : code. */
18863 : 80772620 : && !DECL_DEFAULTED_FN (fn)
18864 : 339326305 : && !type_throw_all_p (TREE_TYPE (fn)));
18865 : : }
18866 : :
18867 : : /* Helper function to push ARGS into the current lexical scope. DECL
18868 : : is the function declaration. NONPARMS is used to handle enum
18869 : : constants. */
18870 : :
18871 : : void
18872 : 133249664 : do_push_parm_decls (tree decl, tree args, tree *nonparms)
18873 : : {
18874 : : /* If we're doing semantic analysis, then we'll call pushdecl
18875 : : for each of these. We must do them in reverse order so that
18876 : : they end in the correct forward order. */
18877 : 133249664 : args = nreverse (args);
18878 : :
18879 : 133249664 : tree next;
18880 : 407342000 : for (tree parm = args; parm; parm = next)
18881 : : {
18882 : 274092336 : next = DECL_CHAIN (parm);
18883 : 274092336 : if (TREE_CODE (parm) == PARM_DECL)
18884 : 274092336 : pushdecl (parm);
18885 : 0 : else if (nonparms)
18886 : : {
18887 : : /* If we find an enum constant or a type tag, put it aside for
18888 : : the moment. */
18889 : 0 : TREE_CHAIN (parm) = NULL_TREE;
18890 : 0 : *nonparms = chainon (*nonparms, parm);
18891 : : }
18892 : : }
18893 : :
18894 : : /* Get the decls in their original chain order and record in the
18895 : : function. This is all and only the PARM_DECLs that were
18896 : : pushed into scope by the loop above. */
18897 : 133249664 : DECL_ARGUMENTS (decl) = get_local_decls ();
18898 : 133249664 : }
18899 : :
18900 : : /* Store the parameter declarations into the current function declaration.
18901 : : This is called after parsing the parameter declarations, before
18902 : : digesting the body of the function.
18903 : :
18904 : : Also install to binding contour return value identifier, if any. */
18905 : :
18906 : : static void
18907 : 136360309 : store_parm_decls (tree current_function_parms)
18908 : : {
18909 : 136360309 : tree fndecl = current_function_decl;
18910 : :
18911 : : /* This is a chain of any other decls that came in among the parm
18912 : : declarations. If a parm is declared with enum {foo, bar} x;
18913 : : then CONST_DECLs for foo and bar are put here. */
18914 : 136360309 : tree nonparms = NULL_TREE;
18915 : :
18916 : 136360309 : if (current_function_parms)
18917 : : {
18918 : : /* This case is when the function was defined with an ANSI prototype.
18919 : : The parms already have decls, so we need not do anything here
18920 : : except record them as in effect
18921 : : and complain if any redundant old-style parm decls were written. */
18922 : :
18923 : 130821574 : tree specparms = current_function_parms;
18924 : :
18925 : : /* Must clear this because it might contain TYPE_DECLs declared
18926 : : at class level. */
18927 : 130821574 : current_binding_level->names = NULL;
18928 : :
18929 : 130821574 : do_push_parm_decls (fndecl, specparms, &nonparms);
18930 : : }
18931 : : else
18932 : 5538735 : DECL_ARGUMENTS (fndecl) = NULL_TREE;
18933 : :
18934 : : /* Now store the final chain of decls for the arguments
18935 : : as the decl-chain of the current lexical scope.
18936 : : Put the enumerators in as well, at the front so that
18937 : : DECL_ARGUMENTS is not modified. */
18938 : 136360309 : current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
18939 : :
18940 : 136360309 : if (use_eh_spec_block (current_function_decl))
18941 : 17805868 : current_eh_spec_block = begin_eh_spec_block ();
18942 : 136360309 : }
18943 : :
18944 : :
18945 : : /* Mark CDTOR's implicit THIS argument for returning, if required by
18946 : : the ABI.. Return the decl for THIS, if it is to be returned, and
18947 : : NULL otherwise. */
18948 : :
18949 : : tree
18950 : 107256439 : maybe_prepare_return_this (tree cdtor)
18951 : : {
18952 : 107256439 : if (targetm.cxx.cdtor_returns_this ())
18953 : 0 : if (tree val = DECL_ARGUMENTS (cdtor))
18954 : : {
18955 : 0 : suppress_warning (val, OPT_Wuse_after_free);
18956 : 0 : return val;
18957 : : }
18958 : :
18959 : : return NULL_TREE;
18960 : : }
18961 : :
18962 : : /* Set the return value of the [cd]tor if the ABI wants that. */
18963 : :
18964 : : void
18965 : 6791734 : maybe_return_this ()
18966 : : {
18967 : 6791734 : if (tree val = maybe_prepare_return_this (current_function_decl))
18968 : : {
18969 : : /* Return the address of the object. */
18970 : 0 : val = fold_convert (TREE_TYPE (DECL_RESULT (current_function_decl)), val);
18971 : 0 : val = build2 (MODIFY_EXPR, TREE_TYPE (val),
18972 : 0 : DECL_RESULT (current_function_decl), val);
18973 : 0 : tree exprstmt = build_stmt (input_location, RETURN_EXPR, val);
18974 : 0 : add_stmt (exprstmt);
18975 : : }
18976 : 6791734 : }
18977 : :
18978 : : /* Do all the processing for the beginning of a destructor; set up the
18979 : : vtable pointers and cleanups for bases and members. */
18980 : :
18981 : : static void
18982 : 1444725 : begin_destructor_body (void)
18983 : : {
18984 : 1444725 : tree compound_stmt;
18985 : :
18986 : : /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
18987 : : issued an error message. We still want to try to process the
18988 : : body of the function, but initialize_vtbl_ptrs will crash if
18989 : : TYPE_BINFO is NULL. */
18990 : 1444725 : if (COMPLETE_TYPE_P (current_class_type))
18991 : : {
18992 : 1444725 : compound_stmt = begin_compound_stmt (0);
18993 : : /* Make all virtual function table pointers in non-virtual base
18994 : : classes point to CURRENT_CLASS_TYPE's virtual function
18995 : : tables. */
18996 : 1444725 : initialize_vtbl_ptrs (current_class_ptr);
18997 : 1444725 : finish_compound_stmt (compound_stmt);
18998 : :
18999 : 1444725 : if (flag_lifetime_dse
19000 : : /* Clobbering an empty base is harmful if it overlays real data. */
19001 : 1444725 : && !is_empty_class (current_class_type))
19002 : : {
19003 : 1254915 : if (sanitize_flags_p (SANITIZE_VPTR)
19004 : 216 : && (flag_sanitize_recover & SANITIZE_VPTR) == 0
19005 : 1254978 : && TYPE_CONTAINS_VPTR_P (current_class_type))
19006 : : {
19007 : 63 : tree binfo = TYPE_BINFO (current_class_type);
19008 : 63 : tree ref
19009 : 63 : = cp_build_fold_indirect_ref (current_class_ptr);
19010 : :
19011 : 63 : tree vtbl_ptr = build_vfield_ref (ref, TREE_TYPE (binfo));
19012 : 63 : tree vtbl = build_zero_cst (TREE_TYPE (vtbl_ptr));
19013 : 63 : tree stmt = cp_build_modify_expr (input_location, vtbl_ptr,
19014 : : NOP_EXPR, vtbl,
19015 : : tf_warning_or_error);
19016 : : /* If the vptr is shared with some virtual nearly empty base,
19017 : : don't clear it if not in charge, the dtor of the virtual
19018 : : nearly empty base will do that later. */
19019 : 63 : if (CLASSTYPE_VBASECLASSES (current_class_type))
19020 : : {
19021 : : tree c = current_class_type;
19022 : 66 : while (CLASSTYPE_PRIMARY_BINFO (c))
19023 : : {
19024 : 63 : if (BINFO_VIRTUAL_P (CLASSTYPE_PRIMARY_BINFO (c)))
19025 : : {
19026 : 36 : stmt = convert_to_void (stmt, ICV_STATEMENT,
19027 : : tf_warning_or_error);
19028 : 36 : stmt = build_if_in_charge (stmt);
19029 : 36 : break;
19030 : : }
19031 : 27 : c = BINFO_TYPE (CLASSTYPE_PRIMARY_BINFO (c));
19032 : : }
19033 : : }
19034 : 63 : finish_decl_cleanup (NULL_TREE, stmt);
19035 : : }
19036 : : else
19037 : 1254852 : finish_decl_cleanup (NULL_TREE,
19038 : : build_clobber_this (CLOBBER_OBJECT_END));
19039 : : }
19040 : :
19041 : : /* And insert cleanups for our bases and members so that they
19042 : : will be properly destroyed if we throw. */
19043 : 1444725 : push_base_cleanups ();
19044 : : }
19045 : 1444725 : }
19046 : :
19047 : : /* Do the necessary processing for the beginning of a function body, which
19048 : : in this case includes member-initializers, but not the catch clauses of
19049 : : a function-try-block. Currently, this means opening a binding level
19050 : : for the member-initializers (in a ctor), member cleanups (in a dtor),
19051 : : and capture proxies (in a lambda operator()). */
19052 : :
19053 : : tree
19054 : 108742106 : begin_function_body (void)
19055 : : {
19056 : 222143172 : if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
19057 : : return NULL_TREE;
19058 : :
19059 : 21582238 : if (processing_template_decl)
19060 : : /* Do nothing now. */;
19061 : : else
19062 : : /* Always keep the BLOCK node associated with the outermost pair of
19063 : : curly braces of a function. These are needed for correct
19064 : : operation of dwarfout.c. */
19065 : 6937420 : keep_next_level (true);
19066 : :
19067 : 21582238 : tree stmt = begin_compound_stmt (BCS_FN_BODY);
19068 : 21582238 : current_binding_level->artificial = 1;
19069 : :
19070 : 21582238 : if (processing_template_decl)
19071 : : /* Do nothing now. */;
19072 : 13874840 : else if (DECL_DESTRUCTOR_P (current_function_decl))
19073 : 1444725 : begin_destructor_body ();
19074 : :
19075 : : return stmt;
19076 : : }
19077 : :
19078 : : /* Do the processing for the end of a function body. Currently, this means
19079 : : closing out the cleanups for fully-constructed bases and members, and in
19080 : : the case of the destructor, deleting the object if desired. Again, this
19081 : : is only meaningful for [cd]tors, since they are the only functions where
19082 : : there is a significant distinction between the main body and any
19083 : : function catch clauses. Handling, say, main() return semantics here
19084 : : would be wrong, as flowing off the end of a function catch clause for
19085 : : main() would also need to return 0. */
19086 : :
19087 : : void
19088 : 108742082 : finish_function_body (tree compstmt)
19089 : : {
19090 : 108742082 : if (compstmt == NULL_TREE)
19091 : : return;
19092 : :
19093 : : /* Close the block. */
19094 : 21582238 : finish_compound_stmt (compstmt);
19095 : :
19096 : 21582238 : if (processing_template_decl)
19097 : : /* Do nothing now. */;
19098 : 6937420 : else if (DECL_CONSTRUCTOR_P (current_function_decl)
19099 : 6937420 : || DECL_DESTRUCTOR_P (current_function_decl))
19100 : 6538273 : maybe_return_this ();
19101 : : }
19102 : :
19103 : : /* Given a function, returns the BLOCK corresponding to the outermost level
19104 : : of curly braces, skipping the artificial block created for constructor
19105 : : initializers. */
19106 : :
19107 : : tree
19108 : 293758 : outer_curly_brace_block (tree fndecl)
19109 : : {
19110 : 293758 : tree block = DECL_INITIAL (fndecl);
19111 : 293758 : if (BLOCK_OUTER_CURLY_BRACE_P (block))
19112 : : return block;
19113 : 239 : block = BLOCK_SUBBLOCKS (block);
19114 : 239 : if (BLOCK_OUTER_CURLY_BRACE_P (block))
19115 : : return block;
19116 : 0 : block = BLOCK_SUBBLOCKS (block);
19117 : 0 : gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block));
19118 : : return block;
19119 : : }
19120 : :
19121 : : /* If FNDECL is a class's key method, add the class to the list of
19122 : : keyed classes that should be emitted. */
19123 : :
19124 : : static void
19125 : 136364131 : record_key_method_defined (tree fndecl)
19126 : : {
19127 : 184769943 : if (DECL_OBJECT_MEMBER_FUNCTION_P (fndecl)
19128 : 87982180 : && DECL_VIRTUAL_P (fndecl)
19129 : 138859994 : && !processing_template_decl)
19130 : : {
19131 : 1209843 : tree fnclass = DECL_CONTEXT (fndecl);
19132 : 1209843 : if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
19133 : : {
19134 : 1608 : tree classdecl = TYPE_NAME (fnclass);
19135 : : /* Classes attached to a named module are already handled. */
19136 : 1608 : if (!DECL_LANG_SPECIFIC (classdecl)
19137 : 1656 : || !DECL_MODULE_ATTACH_P (classdecl))
19138 : 1563 : vec_safe_push (keyed_classes, fnclass);
19139 : : }
19140 : : }
19141 : 136364131 : }
19142 : :
19143 : : /* Attempt to add a fix-it hint to RICHLOC suggesting the insertion
19144 : : of "return *this;" immediately before its location, using FNDECL's
19145 : : first statement (if any) to give the indentation, if appropriate. */
19146 : :
19147 : : static void
19148 : 18 : add_return_star_this_fixit (gcc_rich_location *richloc, tree fndecl)
19149 : : {
19150 : 18 : location_t indent = UNKNOWN_LOCATION;
19151 : 18 : tree stmts = expr_first (DECL_SAVED_TREE (fndecl));
19152 : 18 : if (stmts)
19153 : 9 : indent = EXPR_LOCATION (stmts);
19154 : 18 : richloc->add_fixit_insert_formatted ("return *this;",
19155 : : richloc->get_loc (),
19156 : : indent);
19157 : 18 : }
19158 : :
19159 : : /* Finish up a function declaration and compile that function
19160 : : all the way to assembler language output. The free the storage
19161 : : for the function definition. INLINE_P is TRUE if we just
19162 : : finished processing the body of an in-class inline function
19163 : : definition. (This processing will have taken place after the
19164 : : class definition is complete.) */
19165 : :
19166 : : tree
19167 : 136360273 : finish_function (bool inline_p)
19168 : : {
19169 : 136360273 : tree fndecl = current_function_decl;
19170 : 136360273 : tree fntype, ctype = NULL_TREE;
19171 : 136360273 : tree resumer = NULL_TREE, destroyer = NULL_TREE;
19172 : :
19173 : : /* When we get some parse errors, we can end up without a
19174 : : current_function_decl, so cope. */
19175 : 136360273 : if (fndecl == NULL_TREE || fndecl == error_mark_node)
19176 : 0 : return error_mark_node;
19177 : :
19178 : 136360273 : bool do_contracts = (DECL_HAS_CONTRACTS_P (fndecl)
19179 : 136360273 : && !processing_template_decl);
19180 : :
19181 : 136360273 : if (!DECL_OMP_DECLARE_REDUCTION_P (fndecl))
19182 : 136359705 : finish_lambda_scope ();
19183 : :
19184 : 136360273 : if (c_dialect_objc ())
19185 : 0 : objc_finish_function ();
19186 : :
19187 : 136360273 : record_key_method_defined (fndecl);
19188 : :
19189 : 136360273 : fntype = TREE_TYPE (fndecl);
19190 : :
19191 : : /* TREE_READONLY (fndecl) = 1;
19192 : : This caused &foo to be of type ptr-to-const-function
19193 : : which then got a warning when stored in a ptr-to-function variable. */
19194 : :
19195 : 136360273 : gcc_assert (building_stmt_list_p ());
19196 : : /* The current function is being defined, so its DECL_INITIAL should
19197 : : be set, and unless there's a multiple definition, it should be
19198 : : error_mark_node. */
19199 : 136360273 : gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
19200 : :
19201 : 136360273 : cp_coroutine_transform *coroutine = nullptr;
19202 : 136360273 : if (flag_coroutines
19203 : 42499168 : && !processing_template_decl
19204 : 18633794 : && DECL_COROUTINE_P (fndecl)
19205 : 136361664 : && !DECL_RAMP_FN (fndecl))
19206 : : {
19207 : 1391 : gcc_checking_assert (!DECL_CLONED_FUNCTION_P (fndecl)
19208 : : && !DECL_DEFAULTED_FN (fndecl));
19209 : 1391 : coroutine = new cp_coroutine_transform (fndecl, inline_p);
19210 : 1391 : if (coroutine && coroutine->cp_valid_coroutine ())
19211 : 1391 : coroutine->apply_transforms ();
19212 : :
19213 : : /* We should handle coroutine IFNs in middle end lowering. */
19214 : 1391 : cfun->coroutine_component = true;
19215 : :
19216 : : /* Do not try to process the ramp's EH unless outlining succeeded. */
19217 : 1391 : if (coroutine->cp_valid_coroutine () && use_eh_spec_block (fndecl))
19218 : 389 : finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
19219 : : (TREE_TYPE (fndecl)),
19220 : 389 : current_eh_spec_block);
19221 : :
19222 : : /* If outlining succeeded, then add contracts handling if needed. */
19223 : 1391 : if (coroutine->cp_valid_coroutine () && do_contracts)
19224 : 2 : maybe_apply_function_contracts (fndecl);
19225 : : }
19226 : : else
19227 : : /* For a cloned function, we've already got all the code we need;
19228 : : there's no need to add any extra bits. */
19229 : 136358882 : if (!DECL_CLONED_FUNCTION_P (fndecl))
19230 : : {
19231 : : /* Make it so that `main' always returns 0 by default. */
19232 : 123018305 : if (DECL_MAIN_FREESTANDING_P (current_function_decl)
19233 : 123050793 : && !TREE_THIS_VOLATILE (current_function_decl))
19234 : 32488 : finish_return_stmt (integer_zero_node);
19235 : :
19236 : 123018305 : if (use_eh_spec_block (current_function_decl))
19237 : 17805478 : finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
19238 : : (TREE_TYPE (current_function_decl)),
19239 : 17805478 : current_eh_spec_block);
19240 : :
19241 : 123018305 : if (do_contracts)
19242 : 420 : maybe_apply_function_contracts (current_function_decl);
19243 : :
19244 : : }
19245 : :
19246 : : /* If we're saving up tree structure, tie off the function now. */
19247 : 136360273 : DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
19248 : :
19249 : 136360273 : finish_fname_decls ();
19250 : :
19251 : : /* This must come after expand_function_end because cleanups might
19252 : : have declarations (from inline functions) that need to go into
19253 : : this function's blocks. */
19254 : :
19255 : : /* If the current binding level isn't the outermost binding level
19256 : : for this function, either there is a bug, or we have experienced
19257 : : syntax errors and the statement tree is malformed. */
19258 : 136360273 : if (current_binding_level->kind != sk_function_parms)
19259 : : {
19260 : : /* Make sure we have already experienced errors. */
19261 : 7 : gcc_assert (errorcount);
19262 : :
19263 : : /* Throw away the broken statement tree and extra binding
19264 : : levels. */
19265 : 7 : DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
19266 : :
19267 : 18 : while (current_binding_level->kind != sk_function_parms)
19268 : : {
19269 : 11 : if (current_binding_level->kind == sk_class)
19270 : 0 : pop_nested_class ();
19271 : : else
19272 : 11 : poplevel (0, 0, 0);
19273 : : }
19274 : : }
19275 : 136360273 : poplevel (1, 0, 1);
19276 : :
19277 : : /* Statements should always be full-expressions at the outermost set
19278 : : of curly braces for a function. */
19279 : 136360273 : gcc_assert (stmts_are_full_exprs_p ());
19280 : :
19281 : : /* If there are no return statements in a function with auto return type,
19282 : : the return type is void. But if the declared type is something like
19283 : : auto*, this is an error. */
19284 : 54150557 : if (!processing_template_decl && FNDECL_USED_AUTO (fndecl)
19285 : 137093762 : && TREE_TYPE (fntype) == DECL_SAVED_AUTO_RETURN_TYPE (fndecl))
19286 : : {
19287 : 189589 : if (is_auto (DECL_SAVED_AUTO_RETURN_TYPE (fndecl))
19288 : 189574 : && !current_function_returns_value
19289 : 189589 : && !current_function_returns_null)
19290 : : {
19291 : : /* We haven't applied return type deduction because we haven't
19292 : : seen any return statements. Do that now. */
19293 : 189388 : tree node = type_uses_auto (DECL_SAVED_AUTO_RETURN_TYPE (fndecl));
19294 : 189388 : do_auto_deduction (DECL_SAVED_AUTO_RETURN_TYPE (fndecl),
19295 : : void_node, node, tf_warning_or_error,
19296 : : adc_return_type);
19297 : :
19298 : 189388 : apply_deduced_return_type (fndecl, void_type_node);
19299 : 189388 : fntype = TREE_TYPE (fndecl);
19300 : : }
19301 : 201 : else if (!current_function_returns_value
19302 : 201 : && !current_function_returns_null)
19303 : : {
19304 : 6 : auto_diagnostic_group d;
19305 : 12 : error ("no return statements in function returning %qT",
19306 : 6 : DECL_SAVED_AUTO_RETURN_TYPE (fndecl));
19307 : 6 : inform (input_location, "only plain %<auto%> return type can be "
19308 : : "deduced to %<void%>");
19309 : 6 : }
19310 : : }
19311 : :
19312 : : /* Remember that we were in class scope. */
19313 : 136360273 : if (current_class_name)
19314 : 100896776 : ctype = current_class_type;
19315 : :
19316 : 136360273 : if (DECL_DELETED_FN (fndecl))
19317 : : {
19318 : 87 : DECL_INITIAL (fndecl) = error_mark_node;
19319 : 87 : DECL_SAVED_TREE (fndecl) = NULL_TREE;
19320 : 87 : goto cleanup;
19321 : : }
19322 : :
19323 : 136360186 : if (flag_openmp)
19324 : 148811 : if (tree attr = lookup_attribute ("omp declare variant base",
19325 : 148811 : DECL_ATTRIBUTES (fndecl)))
19326 : 157 : omp_declare_variant_finalize (fndecl, attr);
19327 : :
19328 : : /* Complain if there's just no return statement. */
19329 : 136360186 : if ((warn_return_type
19330 : 41331 : || (cxx_dialect >= cxx14
19331 : 33277 : && DECL_DECLARED_CONSTEXPR_P (fndecl)))
19332 : 136328721 : && !VOID_TYPE_P (TREE_TYPE (fntype))
19333 : 83791607 : && !dependent_type_p (TREE_TYPE (fntype))
19334 : 43489018 : && !current_function_returns_value && !current_function_returns_null
19335 : : /* Don't complain if we abort or throw. */
19336 : : && !current_function_returns_abnormally
19337 : : /* Don't complain if there's an infinite loop. */
19338 : 43489018 : && !current_function_infinite_loop
19339 : : /* Don't complain if we are declared noreturn. */
19340 : 798 : && !TREE_THIS_VOLATILE (fndecl)
19341 : 792 : && !DECL_NAME (DECL_RESULT (fndecl))
19342 : 792 : && !warning_suppressed_p (fndecl, OPT_Wreturn_type)
19343 : : /* Structor return values (if any) are set by the compiler. */
19344 : 1218 : && !DECL_CONSTRUCTOR_P (fndecl)
19345 : 609 : && !DECL_DESTRUCTOR_P (fndecl)
19346 : 136360795 : && targetm.warn_func_return (fndecl))
19347 : : {
19348 : 603 : gcc_rich_location richloc (input_location);
19349 : : /* Potentially add a "return *this;" fix-it hint for
19350 : : assignment operators. */
19351 : 603 : if (IDENTIFIER_ASSIGN_OP_P (DECL_NAME (fndecl)))
19352 : : {
19353 : 39 : tree valtype = TREE_TYPE (DECL_RESULT (fndecl));
19354 : 39 : if (TREE_CODE (valtype) == REFERENCE_TYPE
19355 : 32 : && current_class_ref
19356 : 26 : && same_type_ignoring_top_level_qualifiers_p
19357 : 26 : (TREE_TYPE (valtype), TREE_TYPE (current_class_ref))
19358 : 71 : && global_dc->option_enabled_p (OPT_Wreturn_type))
19359 : 18 : add_return_star_this_fixit (&richloc, fndecl);
19360 : : }
19361 : 603 : if (cxx_dialect >= cxx14
19362 : 603 : && DECL_DECLARED_CONSTEXPR_P (fndecl))
19363 : 2 : error_at (&richloc, "no return statement in %<constexpr%> function "
19364 : : "returning non-void");
19365 : 601 : else if (warning_at (&richloc, OPT_Wreturn_type,
19366 : : "no return statement in function returning "
19367 : : "non-void"))
19368 : 162 : suppress_warning (fndecl, OPT_Wreturn_type);
19369 : 603 : }
19370 : :
19371 : : /* Lambda closure members are implicitly constexpr if possible. */
19372 : 136360186 : if (cxx_dialect >= cxx17
19373 : 233556352 : && LAMBDA_TYPE_P (CP_DECL_CONTEXT (fndecl)))
19374 : 1052279 : DECL_DECLARED_CONSTEXPR_P (fndecl)
19375 : 1052279 : = ((processing_template_decl
19376 : 471899 : || is_valid_constexpr_fn (fndecl, /*complain*/false))
19377 : 2103360 : && potential_constant_expression (DECL_SAVED_TREE (fndecl)));
19378 : :
19379 : : /* Save constexpr function body before it gets munged by
19380 : : the NRV transformation. */
19381 : 136360186 : maybe_save_constexpr_fundef (fndecl);
19382 : :
19383 : : /* Invoke the pre-genericize plugin before we start munging things. */
19384 : 136360186 : if (!processing_template_decl)
19385 : 54150470 : invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
19386 : :
19387 : : /* Perform delayed folding before NRV transformation. */
19388 : 136360186 : if (!processing_template_decl
19389 : 108300940 : && !DECL_IMMEDIATE_FUNCTION_P (fndecl)
19390 : 190288861 : && !DECL_OMP_DECLARE_REDUCTION_P (fndecl))
19391 : 53928237 : cp_fold_function (fndecl);
19392 : :
19393 : : /* Set up the named return value optimization, if we can. Candidate
19394 : : variables are selected in check_return_expr. */
19395 : 136360186 : if (tree r = current_function_return_value)
19396 : : {
19397 : 33763064 : if (r != error_mark_node)
19398 : 171319 : finalize_nrv (fndecl, r);
19399 : 33763064 : current_function_return_value = NULL_TREE;
19400 : : }
19401 : :
19402 : : /* Must mark the RESULT_DECL as being in this function. */
19403 : 136360186 : DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
19404 : :
19405 : : /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
19406 : : to the FUNCTION_DECL node itself. */
19407 : 136360186 : BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
19408 : :
19409 : : /* Store the end of the function, so that we get good line number
19410 : : info for the epilogue. */
19411 : 136360186 : cfun->function_end_locus = input_location;
19412 : :
19413 : : /* Complain about parameters that are only set, but never otherwise used. */
19414 : 136360186 : if (warn_unused_but_set_parameter
19415 : 894627 : && !processing_template_decl
19416 : 457772 : && errorcount == unused_but_set_errorcount
19417 : 136817955 : && !DECL_CLONED_FUNCTION_P (fndecl))
19418 : : {
19419 : 358091 : tree decl;
19420 : :
19421 : 358091 : for (decl = DECL_ARGUMENTS (fndecl);
19422 : 956537 : decl;
19423 : 598446 : decl = DECL_CHAIN (decl))
19424 : 598446 : if (TREE_USED (decl)
19425 : 598446 : && TREE_CODE (decl) == PARM_DECL
19426 : 494041 : && !DECL_READ_P (decl)
19427 : 6 : && DECL_NAME (decl)
19428 : 6 : && !DECL_ARTIFICIAL (decl)
19429 : 6 : && !warning_suppressed_p (decl,OPT_Wunused_but_set_parameter)
19430 : 6 : && !DECL_IN_SYSTEM_HEADER (decl)
19431 : 6 : && TREE_TYPE (decl) != error_mark_node
19432 : 6 : && !TYPE_REF_P (TREE_TYPE (decl))
19433 : 598452 : && (!CLASS_TYPE_P (TREE_TYPE (decl))
19434 : 0 : || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
19435 : 6 : warning_at (DECL_SOURCE_LOCATION (decl),
19436 : : OPT_Wunused_but_set_parameter,
19437 : : "parameter %qD set but not used", decl);
19438 : 358091 : unused_but_set_errorcount = errorcount;
19439 : : }
19440 : :
19441 : : /* Complain about locally defined typedefs that are not used in this
19442 : : function. */
19443 : 136360186 : maybe_warn_unused_local_typedefs ();
19444 : :
19445 : : /* Possibly warn about unused parameters. */
19446 : 136360186 : if (warn_unused_parameter
19447 : 625365 : && !processing_template_decl
19448 : 136660491 : && !DECL_CLONED_FUNCTION_P (fndecl))
19449 : 230381 : do_warn_unused_parameter (fndecl);
19450 : :
19451 : : /* Genericize before inlining. */
19452 : 136360186 : if (!processing_template_decl
19453 : 108300940 : && !DECL_IMMEDIATE_FUNCTION_P (fndecl)
19454 : 190288711 : && !DECL_OMP_DECLARE_REDUCTION_P (fndecl))
19455 : 53928087 : cp_genericize (fndecl);
19456 : :
19457 : : /* If this function can't throw any exceptions, remember that. */
19458 : 136360186 : if (!processing_template_decl
19459 : 54150470 : && !cp_function_chain->can_throw
19460 : 40878769 : && !flag_non_call_exceptions
19461 : 40874250 : && !decl_replaceable_p (fndecl,
19462 : 40874250 : opt_for_fn (fndecl, flag_semantic_interposition))
19463 : 176989640 : && !lookup_attribute ("noipa", DECL_ATTRIBUTES (fndecl)))
19464 : 40627181 : TREE_NOTHROW (fndecl) = 1;
19465 : :
19466 : 136360273 : cleanup:
19467 : :
19468 : : /* We're leaving the context of this function, so zap cfun. It's still in
19469 : : DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
19470 : 136360273 : set_cfun (NULL);
19471 : 136360273 : current_function_decl = NULL;
19472 : :
19473 : : /* If this is an in-class inline definition, we may have to pop the
19474 : : bindings for the template parameters that we added in
19475 : : maybe_begin_member_template_processing when start_function was
19476 : : called. */
19477 : 136360273 : if (inline_p)
19478 : 66415179 : maybe_end_member_template_processing ();
19479 : :
19480 : : /* Leave the scope of the class. */
19481 : 136360273 : if (ctype)
19482 : 100896776 : pop_nested_class ();
19483 : :
19484 : 136360273 : --function_depth;
19485 : :
19486 : : /* Clean up. */
19487 : 136360273 : invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION, fndecl);
19488 : :
19489 : : /* Build outlined functions for coroutines and contracts. */
19490 : :
19491 : 136360273 : if (coroutine)
19492 : : {
19493 : : /* Emit the resumer and destroyer functions now, providing that we have
19494 : : not encountered some fatal error. */
19495 : 1391 : if (coroutine->cp_valid_coroutine ())
19496 : : {
19497 : 1360 : coroutine->finish_transforms ();
19498 : 1360 : resumer = coroutine->get_resumer ();
19499 : 1360 : destroyer = coroutine->get_destroyer ();
19500 : 1360 : expand_or_defer_fn (resumer);
19501 : 1360 : expand_or_defer_fn (destroyer);
19502 : : }
19503 : 1391 : delete coroutine;
19504 : : }
19505 : :
19506 : : /* If we have used outlined contracts checking functions, build and emit
19507 : : them here. */
19508 : 136360273 : finish_function_contracts (fndecl);
19509 : :
19510 : 136360273 : return fndecl;
19511 : : }
19512 : :
19513 : : /* Create the FUNCTION_DECL for a function definition.
19514 : : DECLSPECS and DECLARATOR are the parts of the declaration;
19515 : : they describe the return type and the name of the function,
19516 : : but twisted together in a fashion that parallels the syntax of C.
19517 : :
19518 : : This function creates a binding context for the function body
19519 : : as well as setting up the FUNCTION_DECL in current_function_decl.
19520 : :
19521 : : Returns a FUNCTION_DECL on success.
19522 : :
19523 : : If the DECLARATOR is not suitable for a function (it defines a datum
19524 : : instead), we return 0, which tells yyparse to report a parse error.
19525 : :
19526 : : May return void_type_node indicating that this method is actually
19527 : : a friend. See grokfield for more details.
19528 : :
19529 : : Came here with a `.pushlevel' .
19530 : :
19531 : : DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
19532 : : CHANGES TO CODE IN `grokfield'. */
19533 : :
19534 : : tree
19535 : 66142993 : grokmethod (cp_decl_specifier_seq *declspecs,
19536 : : const cp_declarator *declarator, tree attrlist)
19537 : : {
19538 : 66142993 : tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
19539 : 66142993 : &attrlist);
19540 : :
19541 : 66142993 : if (fndecl == error_mark_node)
19542 : : return error_mark_node;
19543 : :
19544 : 66142890 : if (attrlist)
19545 : 0 : cplus_decl_attributes (&fndecl, attrlist, 0);
19546 : :
19547 : : /* Pass friends other than inline friend functions back. */
19548 : 66142890 : if (fndecl == void_type_node)
19549 : : return fndecl;
19550 : :
19551 : 66142890 : if (DECL_IN_AGGR_P (fndecl))
19552 : : {
19553 : 0 : if (DECL_CLASS_SCOPE_P (fndecl))
19554 : 0 : error ("%qD is already defined in class %qT", fndecl,
19555 : 0 : DECL_CONTEXT (fndecl));
19556 : 0 : return error_mark_node;
19557 : : }
19558 : :
19559 : 66142890 : check_template_shadow (fndecl);
19560 : :
19561 : : /* p1779 ABI-Isolation makes inline not a default for in-class
19562 : : definitions attached to a named module. If the user explicitly
19563 : : made it inline, grokdeclarator will already have done the right
19564 : : things. */
19565 : 66142890 : if ((!named_module_attach_p ()
19566 : 372 : || flag_module_implicit_inline
19567 : : /* Lambda's operator function remains inline. */
19568 : 729 : || LAMBDA_TYPE_P (DECL_CONTEXT (fndecl)))
19569 : : /* If the user explicitly asked for this to be inline, we don't
19570 : : need to do more, but more importantly we want to warn if we
19571 : : can't inline it. */
19572 : 66142566 : && !DECL_DECLARED_INLINE_P (fndecl))
19573 : : {
19574 : 48863904 : if (TREE_PUBLIC (fndecl))
19575 : 47906489 : DECL_COMDAT (fndecl) = 1;
19576 : 48863904 : DECL_DECLARED_INLINE_P (fndecl) = 1;
19577 : : /* It's ok if we can't inline this. */
19578 : 48863904 : DECL_NO_INLINE_WARNING_P (fndecl) = 1;
19579 : : }
19580 : :
19581 : : /* We process method specializations in finish_struct_1. */
19582 : 66142890 : if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
19583 : : {
19584 : : /* Avoid calling decl_spec_seq... until we have to. */
19585 : 54500422 : bool friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
19586 : 54500422 : fndecl = push_template_decl (fndecl, friendp);
19587 : 54500422 : if (fndecl == error_mark_node)
19588 : : return fndecl;
19589 : : }
19590 : :
19591 : 66142883 : if (DECL_CHAIN (fndecl) && !decl_spec_seq_has_spec_p (declspecs, ds_friend))
19592 : : {
19593 : 0 : fndecl = copy_node (fndecl);
19594 : 0 : TREE_CHAIN (fndecl) = NULL_TREE;
19595 : : }
19596 : :
19597 : 66142883 : cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
19598 : :
19599 : 66142883 : DECL_IN_AGGR_P (fndecl) = 1;
19600 : 66142883 : return fndecl;
19601 : : }
19602 : :
19603 : :
19604 : : /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
19605 : : we can lay it out later, when and if its type becomes complete.
19606 : :
19607 : : Also handle constexpr variables where the initializer involves
19608 : : an unlowered PTRMEM_CST because the class isn't complete yet. */
19609 : :
19610 : : void
19611 : 83644049 : maybe_register_incomplete_var (tree var)
19612 : : {
19613 : 83644049 : gcc_assert (VAR_P (var));
19614 : :
19615 : : /* Keep track of variables with incomplete types. */
19616 : 37111409 : if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
19617 : 120753883 : && DECL_EXTERNAL (var))
19618 : : {
19619 : 5460845 : tree inner_type = TREE_TYPE (var);
19620 : :
19621 : 5612806 : while (TREE_CODE (inner_type) == ARRAY_TYPE)
19622 : 151961 : inner_type = TREE_TYPE (inner_type);
19623 : 5460845 : inner_type = TYPE_MAIN_VARIANT (inner_type);
19624 : :
19625 : 5499294 : if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
19626 : : /* RTTI TD entries are created while defining the type_info. */
19627 : 5460845 : || (TYPE_LANG_SPECIFIC (inner_type)
19628 : 2176193 : && TYPE_BEING_DEFINED (inner_type)))
19629 : : {
19630 : 38449 : incomplete_var iv = {var, inner_type};
19631 : 38449 : vec_safe_push (incomplete_vars, iv);
19632 : : }
19633 : 10543142 : else if (!(DECL_LANG_SPECIFIC (var) && DECL_TEMPLATE_INFO (var))
19634 : 3324268 : && DECL_CLASS_SCOPE_P (var)
19635 : 1044564 : && TYPE_BEING_DEFINED (DECL_CONTEXT (var))
19636 : 1044564 : && decl_constant_var_p (var)
19637 : 6102628 : && (TYPE_PTRMEM_P (inner_type) || CLASS_TYPE_P (inner_type)))
19638 : : {
19639 : : /* When the outermost open class is complete we can resolve any
19640 : : pointers-to-members. */
19641 : 13 : tree context = outermost_open_class ();
19642 : 13 : incomplete_var iv = {var, context};
19643 : 13 : vec_safe_push (incomplete_vars, iv);
19644 : : }
19645 : : }
19646 : 83644049 : }
19647 : :
19648 : : /* Called when a class type (given by TYPE) is defined. If there are
19649 : : any existing VAR_DECLs whose type has been completed by this
19650 : : declaration, update them now. */
19651 : :
19652 : : void
19653 : 53338241 : complete_vars (tree type)
19654 : : {
19655 : 53338241 : unsigned ix;
19656 : 53338241 : incomplete_var *iv;
19657 : :
19658 : 53765685 : for (ix = 0; vec_safe_iterate (incomplete_vars, ix, &iv); )
19659 : : {
19660 : 427444 : if (same_type_p (type, iv->incomplete_type))
19661 : : {
19662 : 37345 : tree var = iv->decl;
19663 : 37345 : tree type = TREE_TYPE (var);
19664 : :
19665 : 37345 : if (type != error_mark_node
19666 : 37345 : && (TYPE_MAIN_VARIANT (strip_array_types (type))
19667 : 37342 : == iv->incomplete_type))
19668 : : {
19669 : : /* Complete the type of the variable. */
19670 : 37329 : complete_type (type);
19671 : 37329 : cp_apply_type_quals_to_decl (cp_type_quals (type), var);
19672 : 37329 : if (COMPLETE_TYPE_P (type))
19673 : 37314 : layout_var_decl (var);
19674 : : }
19675 : :
19676 : : /* Remove this entry from the list. */
19677 : 37345 : incomplete_vars->unordered_remove (ix);
19678 : : }
19679 : : else
19680 : 390099 : ix++;
19681 : : }
19682 : 53338241 : }
19683 : :
19684 : : /* If DECL is of a type which needs a cleanup, build and return an
19685 : : expression to perform that cleanup here. Return NULL_TREE if no
19686 : : cleanup need be done. DECL can also be a _REF when called from
19687 : : split_nonconstant_init_1. */
19688 : :
19689 : : tree
19690 : 61226657 : cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
19691 : : {
19692 : 61226657 : tree type;
19693 : 61226657 : tree attr;
19694 : 61226657 : tree cleanup;
19695 : :
19696 : : /* Assume no cleanup is required. */
19697 : 61226657 : cleanup = NULL_TREE;
19698 : :
19699 : 61226657 : if (!decl || error_operand_p (decl))
19700 : : return cleanup;
19701 : :
19702 : : /* Handle "__attribute__((cleanup))". We run the cleanup function
19703 : : before the destructor since the destructor is what actually
19704 : : terminates the lifetime of the object. */
19705 : 61226657 : if (DECL_P (decl))
19706 : 60876134 : attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
19707 : : else
19708 : : attr = NULL_TREE;
19709 : 60876134 : if (attr)
19710 : : {
19711 : 157 : tree id;
19712 : 157 : tree fn;
19713 : 157 : tree arg;
19714 : :
19715 : : /* Get the name specified by the user for the cleanup function. */
19716 : 157 : id = TREE_VALUE (TREE_VALUE (attr));
19717 : : /* Look up the name to find the cleanup function to call. It is
19718 : : important to use lookup_name here because that is what is
19719 : : used in c-common.cc:handle_cleanup_attribute when performing
19720 : : initial checks on the attribute. Note that those checks
19721 : : include ensuring that the function found is not an overloaded
19722 : : function, or an object with an overloaded call operator,
19723 : : etc.; we can rely on the fact that the function found is an
19724 : : ordinary FUNCTION_DECL. */
19725 : 157 : fn = lookup_name (id);
19726 : 157 : arg = build_address (decl);
19727 : 157 : if (!mark_used (decl, complain) && !(complain & tf_error))
19728 : 0 : return error_mark_node;
19729 : 157 : cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
19730 : 157 : if (cleanup == error_mark_node)
19731 : : return error_mark_node;
19732 : : }
19733 : : /* Handle ordinary C++ destructors. */
19734 : 61226651 : type = TREE_TYPE (decl);
19735 : 61226651 : if (type_build_dtor_call (type))
19736 : : {
19737 : 5133169 : int flags = LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR;
19738 : 5133169 : tree addr;
19739 : 5133169 : tree call;
19740 : :
19741 : 5133169 : if (TREE_CODE (type) == ARRAY_TYPE)
19742 : : addr = decl;
19743 : : else
19744 : 5131504 : addr = build_address (decl);
19745 : :
19746 : 5133169 : call = build_delete (input_location, TREE_TYPE (addr), addr,
19747 : : sfk_complete_destructor, flags, 0, complain);
19748 : 5133169 : if (call == error_mark_node)
19749 : : cleanup = error_mark_node;
19750 : 5133130 : else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
19751 : : /* Discard the call. */;
19752 : 3750079 : else if (decl_maybe_constant_destruction (decl, type)
19753 : 3750210 : && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
19754 : 131 : cxx_constant_dtor (call, decl);
19755 : 3749948 : else if (cleanup)
19756 : 3 : cleanup = cp_build_compound_expr (cleanup, call, complain);
19757 : : else
19758 : : cleanup = call;
19759 : : }
19760 : :
19761 : : /* build_delete sets the location of the destructor call to the
19762 : : current location, even though the destructor is going to be
19763 : : called later, at the end of the current scope. This can lead to
19764 : : a "jumpy" behavior for users of debuggers when they step around
19765 : : the end of the block. So let's unset the location of the
19766 : : destructor call instead. */
19767 : 61226651 : protected_set_expr_location (cleanup, UNKNOWN_LOCATION);
19768 : 61226651 : if (cleanup && CONVERT_EXPR_P (cleanup))
19769 : 0 : protected_set_expr_location (TREE_OPERAND (cleanup, 0), UNKNOWN_LOCATION);
19770 : :
19771 : 0 : if (cleanup
19772 : 3750135 : && DECL_P (decl)
19773 : 3749768 : && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl)))
19774 : : /* Treat objects with destructors as used; the destructor may do
19775 : : something substantive. */
19776 : 3749762 : && !mark_used (decl, complain) && !(complain & tf_error))
19777 : 0 : return error_mark_node;
19778 : :
19779 : 3750135 : if (cleanup && cfun && !processing_template_decl
19780 : 64551696 : && !expr_noexcept_p (cleanup, tf_none))
19781 : 4188 : cp_function_chain->throwing_cleanup = true;
19782 : :
19783 : : return cleanup;
19784 : : }
19785 : :
19786 : :
19787 : : /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
19788 : : FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
19789 : : METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
19790 : :
19791 : : tree
19792 : 2561304 : static_fn_type (tree memfntype)
19793 : : {
19794 : 2561304 : tree fntype;
19795 : 2561304 : tree args;
19796 : :
19797 : 2561304 : if (TYPE_PTRMEMFUNC_P (memfntype))
19798 : 20931 : memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
19799 : 2561304 : if (INDIRECT_TYPE_P (memfntype)
19800 : 2252425 : || TREE_CODE (memfntype) == FUNCTION_DECL)
19801 : 2387681 : memfntype = TREE_TYPE (memfntype);
19802 : 2561304 : if (TREE_CODE (memfntype) == FUNCTION_TYPE)
19803 : : return memfntype;
19804 : 528509 : gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
19805 : 528509 : args = TYPE_ARG_TYPES (memfntype);
19806 : 528509 : fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
19807 : 528509 : fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
19808 : 528509 : fntype = (cp_build_type_attribute_variant
19809 : 528509 : (fntype, TYPE_ATTRIBUTES (memfntype)));
19810 : 528509 : fntype = cxx_copy_lang_qualifiers (fntype, memfntype);
19811 : 528509 : return fntype;
19812 : : }
19813 : :
19814 : : /* DECL was originally constructed as a non-static member function,
19815 : : but turned out to be static. Update it accordingly. */
19816 : :
19817 : : void
19818 : 156278 : revert_static_member_fn (tree decl)
19819 : : {
19820 : 156278 : tree stype = static_fn_type (decl);
19821 : 156278 : cp_cv_quals quals = type_memfn_quals (stype);
19822 : 156278 : cp_ref_qualifier rqual = type_memfn_rqual (stype);
19823 : :
19824 : 156278 : if (quals != TYPE_UNQUALIFIED || rqual != REF_QUAL_NONE)
19825 : 9 : stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED, REF_QUAL_NONE);
19826 : :
19827 : 156278 : TREE_TYPE (decl) = stype;
19828 : :
19829 : 156278 : if (DECL_ARGUMENTS (decl))
19830 : 156278 : DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
19831 : 156278 : DECL_STATIC_FUNCTION_P (decl) = 1;
19832 : 156278 : }
19833 : :
19834 : : /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
19835 : : one of the language-independent trees. */
19836 : :
19837 : : enum cp_tree_node_structure_enum
19838 : 30741490447 : cp_tree_node_structure (union lang_tree_node * t)
19839 : : {
19840 : 30741490447 : switch (TREE_CODE (&t->generic))
19841 : : {
19842 : : case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
19843 : 132495779 : case BASELINK: return TS_CP_BASELINK;
19844 : 28703189 : case CONSTRAINT_INFO: return TS_CP_CONSTRAINT_INFO;
19845 : 9999958 : case DEFERRED_NOEXCEPT: return TS_CP_DEFERRED_NOEXCEPT;
19846 : 3052181 : case DEFERRED_PARSE: return TS_CP_DEFERRED_PARSE;
19847 : 1852777949 : case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
19848 : 1925798 : case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
19849 : 157151 : case BINDING_VECTOR: return TS_CP_BINDING_VECTOR;
19850 : 585441489 : case OVERLOAD: return TS_CP_OVERLOAD;
19851 : 836 : case PTRMEM_CST: return TS_CP_PTRMEM;
19852 : 13169012 : case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
19853 : 567225452 : case TEMPLATE_DECL: return TS_CP_TEMPLATE_DECL;
19854 : 1309158130 : case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
19855 : 564600030 : case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
19856 : 13116849 : case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
19857 : 3 : case TU_LOCAL_ENTITY: return TS_CP_TU_LOCAL_ENTITY;
19858 : 2395407 : case USERDEF_LITERAL: return TS_CP_USERDEF_LITERAL;
19859 : 25657271234 : default: return TS_CP_GENERIC;
19860 : : }
19861 : : }
19862 : :
19863 : : bool
19864 : 14639 : cp_missing_noreturn_ok_p (tree decl)
19865 : : {
19866 : : /* A missing noreturn is ok for the `main' function. */
19867 : 14639 : return DECL_MAIN_P (decl);
19868 : : }
19869 : :
19870 : : /* Return the decl used to identify the COMDAT group into which DECL should
19871 : : be placed. */
19872 : :
19873 : : tree
19874 : 77994483 : cxx_comdat_group (tree decl)
19875 : : {
19876 : : /* Virtual tables, construction virtual tables, and virtual table
19877 : : tables all go in a single COMDAT group, named after the primary
19878 : : virtual table. */
19879 : 77994483 : if (VAR_P (decl) && DECL_VTABLE_OR_VTT_P (decl))
19880 : 421670 : decl = CLASSTYPE_VTABLES (DECL_CONTEXT (decl));
19881 : : /* For all other DECLs, the COMDAT group is the mangled name of the
19882 : : declaration itself. */
19883 : : else
19884 : : {
19885 : 77572813 : while (DECL_THUNK_P (decl))
19886 : : {
19887 : : /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
19888 : : into the same section as the target function. In that case
19889 : : we must return target's name. */
19890 : 0 : tree target = THUNK_TARGET (decl);
19891 : 0 : if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
19892 : 0 : && DECL_SECTION_NAME (target) != NULL
19893 : 0 : && DECL_ONE_ONLY (target))
19894 : : decl = target;
19895 : : else
19896 : : break;
19897 : : }
19898 : : /* If a ctor/dtor has already set the comdat group by
19899 : : maybe_clone_body, don't override it. */
19900 : 77572813 : if (SUPPORTS_ONE_ONLY
19901 : 77572813 : && TREE_CODE (decl) == FUNCTION_DECL
19902 : 77572813 : && DECL_CLONED_FUNCTION_P (decl))
19903 : 14552908 : if (tree comdat = DECL_COMDAT_GROUP (decl))
19904 : : return comdat;
19905 : : }
19906 : :
19907 : : return decl;
19908 : : }
19909 : :
19910 : : /* Returns the return type for FN as written by the user, which may include
19911 : : a placeholder for a deduced return type. */
19912 : :
19913 : : tree
19914 : 457612728 : fndecl_declared_return_type (tree fn)
19915 : : {
19916 : 457612728 : fn = STRIP_TEMPLATE (fn);
19917 : 457612728 : if (FNDECL_USED_AUTO (fn))
19918 : 4311 : return DECL_SAVED_AUTO_RETURN_TYPE (fn);
19919 : :
19920 : 457608417 : return TREE_TYPE (TREE_TYPE (fn));
19921 : : }
19922 : :
19923 : : /* Returns true iff DECL is a variable or function declared with an auto type
19924 : : that has not yet been deduced to a real type. */
19925 : :
19926 : : bool
19927 : 835936890 : undeduced_auto_decl (tree decl)
19928 : : {
19929 : 835936890 : if (cxx_dialect < cxx11)
19930 : : return false;
19931 : 833810340 : STRIP_ANY_LOCATION_WRAPPER (decl);
19932 : 400527910 : return ((VAR_OR_FUNCTION_DECL_P (decl)
19933 : 70892587 : || TREE_CODE (decl) == TEMPLATE_DECL)
19934 : 1163570473 : && type_uses_auto (TREE_TYPE (decl)));
19935 : : }
19936 : :
19937 : : /* Complain if DECL has an undeduced return type. */
19938 : :
19939 : : bool
19940 : 338313014 : require_deduced_type (tree decl, tsubst_flags_t complain)
19941 : : {
19942 : 338313014 : if (undeduced_auto_decl (decl))
19943 : : {
19944 : 2850 : if (TREE_CODE (decl) == FUNCTION_DECL
19945 : 2821 : && fndecl_built_in_p (decl, BUILT_IN_FRONTEND)
19946 : 5088 : && DECL_FE_FUNCTION_CODE (decl) == CP_BUILT_IN_SOURCE_LOCATION)
19947 : : {
19948 : : /* Set the return type of __builtin_source_location. */
19949 : 2238 : tree type = get_source_location_impl_type ();
19950 : 2238 : if (type == error_mark_node)
19951 : : {
19952 : 33 : inform (input_location, "using %qs", "__builtin_source_location");
19953 : 33 : return false;
19954 : : }
19955 : 2205 : type = cp_build_qualified_type (type, TYPE_QUAL_CONST);
19956 : 2205 : type = build_pointer_type (type);
19957 : 2205 : apply_deduced_return_type (decl, type);
19958 : 2205 : return true;
19959 : : }
19960 : :
19961 : 612 : if (warning_suppressed_p (decl) && seen_error ())
19962 : : /* We probably already complained about deduction failure. */;
19963 : 479 : else if (complain & tf_error)
19964 : 74 : error ("use of %qD before deduction of %<auto%>", decl);
19965 : 612 : note_failed_type_completion_for_satisfaction (decl);
19966 : 612 : return false;
19967 : : }
19968 : : return true;
19969 : : }
19970 : :
19971 : : /* Create a representation of the explicit-specifier with
19972 : : constant-expression of EXPR. COMPLAIN is as for tsubst. */
19973 : :
19974 : : tree
19975 : 5914274 : build_explicit_specifier (tree expr, tsubst_flags_t complain)
19976 : : {
19977 : 5914274 : if (check_for_bare_parameter_packs (expr))
19978 : 3 : return error_mark_node;
19979 : :
19980 : 5914271 : if (instantiation_dependent_expression_p (expr))
19981 : : /* Wait for instantiation, tsubst_function_decl will handle it. */
19982 : : return expr;
19983 : :
19984 : 5404357 : expr = build_converted_constant_bool_expr (expr, complain);
19985 : 5404357 : expr = instantiate_non_dependent_expr (expr, complain);
19986 : 5404357 : expr = cxx_constant_value (expr, complain);
19987 : 5404357 : return expr;
19988 : : }
19989 : :
19990 : : #include "gt-cp-decl.h"
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