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1 : : /* Process declarations and variables for -*- C++ -*- compiler.
2 : : Copyright (C) 1988-2024 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 (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 location_t*);
105 : : static tree push_cp_library_fn (enum tree_code, tree, int);
106 : : static tree build_cp_library_fn (tree, enum tree_code, tree, int);
107 : : static void store_parm_decls (tree);
108 : : static void initialize_local_var (tree, tree, bool);
109 : : static void expand_static_init (tree, tree);
110 : : static location_t smallest_type_location (const cp_decl_specifier_seq*);
111 : : static bool identify_goto (tree, location_t, const location_t *,
112 : : diagnostic_t, bool);
113 : :
114 : : /* The following symbols are subsumed in the cp_global_trees array, and
115 : : listed here individually for documentation purposes.
116 : :
117 : : C++ extensions
118 : : tree wchar_decl_node;
119 : :
120 : : tree vtable_entry_type;
121 : : tree delta_type_node;
122 : : tree __t_desc_type_node;
123 : :
124 : : tree class_type_node;
125 : : tree unknown_type_node;
126 : :
127 : : Array type `vtable_entry_type[]'
128 : :
129 : : tree vtbl_type_node;
130 : : tree vtbl_ptr_type_node;
131 : :
132 : : Namespaces,
133 : :
134 : : tree std_node;
135 : : tree abi_node;
136 : :
137 : : A FUNCTION_DECL which can call `abort'. Not necessarily the
138 : : one that the user will declare, but sufficient to be called
139 : : by routines that want to abort the program.
140 : :
141 : : tree abort_fndecl;
142 : :
143 : : Used by RTTI
144 : : tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
145 : : tree tinfo_var_id; */
146 : :
147 : : tree cp_global_trees[CPTI_MAX];
148 : :
149 : : /* A list of objects which have constructors or destructors
150 : : which reside in namespace scope. The decl is stored in
151 : : the TREE_VALUE slot and the initializer is stored
152 : : in the TREE_PURPOSE slot. */
153 : : tree static_aggregates;
154 : :
155 : : /* Like static_aggregates, but for thread_local variables. */
156 : : tree tls_aggregates;
157 : :
158 : : /* A hash-map mapping from variable decls to the dynamic initializer for
159 : : the decl. This is currently only used by OpenMP. */
160 : : decl_tree_map *dynamic_initializers;
161 : :
162 : : /* -- end of C++ */
163 : :
164 : : /* A node for the integer constant 2. */
165 : :
166 : : tree integer_two_node;
167 : :
168 : : /* vector of static decls. */
169 : : vec<tree, va_gc> *static_decls;
170 : :
171 : : /* vector of keyed classes. */
172 : : vec<tree, va_gc> *keyed_classes;
173 : :
174 : : /* Used only for jumps to as-yet undefined labels, since jumps to
175 : : defined labels can have their validity checked immediately. */
176 : :
177 : : struct GTY((chain_next ("%h.next"))) named_label_use_entry {
178 : : struct named_label_use_entry *next;
179 : : /* The binding level to which this entry is *currently* attached.
180 : : This is initially the binding level in which the goto appeared,
181 : : but is modified as scopes are closed. */
182 : : cp_binding_level *binding_level;
183 : : /* The head of the names list that was current when the goto appeared,
184 : : or the inner scope popped. These are the decls that will *not* be
185 : : skipped when jumping to the label. */
186 : : tree names_in_scope;
187 : : /* If the use is a possible destination of a computed goto, a vec of decls
188 : : that aren't destroyed, filled in by poplevel_named_label_1. */
189 : : vec<tree,va_gc> *computed_goto;
190 : : /* The location of the goto, for error reporting. */
191 : : location_t o_goto_locus;
192 : : /* True if an OpenMP structured block scope has been closed since
193 : : the goto appeared. This means that the branch from the label will
194 : : illegally exit an OpenMP scope. */
195 : : bool in_omp_scope;
196 : : };
197 : :
198 : : /* A list of all LABEL_DECLs in the function that have names. Here so
199 : : we can clear out their names' definitions at the end of the
200 : : function, and so we can check the validity of jumps to these labels. */
201 : :
202 : : struct GTY((for_user)) named_label_entry {
203 : :
204 : : tree name; /* Name of decl. */
205 : :
206 : : tree label_decl; /* LABEL_DECL, unless deleted local label. */
207 : :
208 : : named_label_entry *outer; /* Outer shadowed chain. */
209 : :
210 : : /* The binding level to which the label is *currently* attached.
211 : : This is initially set to the binding level in which the label
212 : : is defined, but is modified as scopes are closed. */
213 : : cp_binding_level *binding_level;
214 : :
215 : : /* The head of the names list that was current when the label was
216 : : defined, or the inner scope popped. These are the decls that will
217 : : be skipped when jumping to the label. */
218 : : tree names_in_scope;
219 : :
220 : : /* A vector of all decls from all binding levels that would be
221 : : crossed by a backward branch to the label. */
222 : : vec<tree, va_gc> *bad_decls;
223 : :
224 : : /* A list of uses of the label, before the label is defined. */
225 : : named_label_use_entry *uses;
226 : :
227 : : /* True if we've seen &&label. Appalently we can't use TREE_ADDRESSABLE for
228 : : this, it has a more specific meaning for LABEL_DECL. */
229 : : bool addressed;
230 : :
231 : : /* The following bits are set after the label is defined, and are
232 : : updated as scopes are popped. They indicate that a jump to the
233 : : label will illegally enter a scope of the given flavor. */
234 : : bool in_try_scope;
235 : : bool in_catch_scope;
236 : : bool in_omp_scope;
237 : : bool in_transaction_scope;
238 : : bool in_constexpr_if;
239 : : bool in_consteval_if;
240 : : bool in_stmt_expr;
241 : : };
242 : :
243 : : #define named_labels cp_function_chain->x_named_labels
244 : :
245 : : /* The number of function bodies which we are currently processing.
246 : : (Zero if we are at namespace scope, one inside the body of a
247 : : function, two inside the body of a function in a local class, etc.) */
248 : : int function_depth;
249 : :
250 : : /* Whether the exception-specifier is part of a function type (i.e. C++17). */
251 : : bool flag_noexcept_type;
252 : :
253 : : /* States indicating how grokdeclarator() should handle declspecs marked
254 : : with __attribute__((deprecated)). An object declared as
255 : : __attribute__((deprecated)) suppresses warnings of uses of other
256 : : deprecated items. */
257 : : enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
258 : :
259 : :
260 : : /* A list of VAR_DECLs whose type was incomplete at the time the
261 : : variable was declared. */
262 : :
263 : : struct GTY(()) incomplete_var {
264 : : tree decl;
265 : : tree incomplete_type;
266 : : };
267 : :
268 : :
269 : : static GTY(()) vec<incomplete_var, va_gc> *incomplete_vars;
270 : :
271 : : /* Returns the kind of template specialization we are currently
272 : : processing, given that it's declaration contained N_CLASS_SCOPES
273 : : explicit scope qualifications. */
274 : :
275 : : tmpl_spec_kind
276 : 212261060 : current_tmpl_spec_kind (int n_class_scopes)
277 : : {
278 : 212261060 : int n_template_parm_scopes = 0;
279 : 212261060 : int seen_specialization_p = 0;
280 : 212261060 : int innermost_specialization_p = 0;
281 : 212261060 : cp_binding_level *b;
282 : :
283 : : /* Scan through the template parameter scopes. */
284 : 212261060 : for (b = current_binding_level;
285 : 266037672 : b->kind == sk_template_parms;
286 : 53776612 : b = b->level_chain)
287 : : {
288 : : /* If we see a specialization scope inside a parameter scope,
289 : : then something is wrong. That corresponds to a declaration
290 : : like:
291 : :
292 : : template <class T> template <> ...
293 : :
294 : : which is always invalid since [temp.expl.spec] forbids the
295 : : specialization of a class member template if the enclosing
296 : : class templates are not explicitly specialized as well. */
297 : 53776612 : if (b->explicit_spec_p)
298 : : {
299 : 890961 : if (n_template_parm_scopes == 0)
300 : : innermost_specialization_p = 1;
301 : : else
302 : 1100 : seen_specialization_p = 1;
303 : : }
304 : 52885651 : else if (seen_specialization_p == 1)
305 : : return tsk_invalid_member_spec;
306 : :
307 : 53776612 : ++n_template_parm_scopes;
308 : : }
309 : :
310 : : /* Handle explicit instantiations. */
311 : 212261060 : if (processing_explicit_instantiation)
312 : : {
313 : 1950563 : if (n_template_parm_scopes != 0)
314 : : /* We've seen a template parameter list during an explicit
315 : : instantiation. For example:
316 : :
317 : : template <class T> template void f(int);
318 : :
319 : : This is erroneous. */
320 : : return tsk_invalid_expl_inst;
321 : : else
322 : 1950563 : return tsk_expl_inst;
323 : : }
324 : :
325 : 210310497 : if (n_template_parm_scopes < n_class_scopes)
326 : : /* We've not seen enough template headers to match all the
327 : : specialized classes present. For example:
328 : :
329 : : template <class T> void R<T>::S<T>::f(int);
330 : :
331 : : This is invalid; there needs to be one set of template
332 : : parameters for each class. */
333 : : return tsk_insufficient_parms;
334 : 210310497 : else if (n_template_parm_scopes == n_class_scopes)
335 : : /* We're processing a non-template declaration (even though it may
336 : : be a member of a template class.) For example:
337 : :
338 : : template <class T> void S<T>::f(int);
339 : :
340 : : The `class T' matches the `S<T>', leaving no template headers
341 : : corresponding to the `f'. */
342 : : return tsk_none;
343 : 45848238 : else if (n_template_parm_scopes > n_class_scopes + 1)
344 : : /* We've got too many template headers. For example:
345 : :
346 : : template <> template <class T> void f (T);
347 : :
348 : : There need to be more enclosing classes. */
349 : : return tsk_excessive_parms;
350 : : else
351 : : /* This must be a template. It's of the form:
352 : :
353 : : template <class T> template <class U> void S<T>::f(U);
354 : :
355 : : This is a specialization if the innermost level was a
356 : : specialization; otherwise it's just a definition of the
357 : : template. */
358 : 91291927 : return innermost_specialization_p ? tsk_expl_spec : tsk_template;
359 : : }
360 : :
361 : : /* Exit the current scope. */
362 : :
363 : : void
364 : 81863151 : finish_scope (void)
365 : : {
366 : 81863151 : poplevel (0, 0, 0);
367 : 81863151 : }
368 : :
369 : : /* When a label goes out of scope, check to see if that label was used
370 : : in a valid manner, and issue any appropriate warnings or errors. */
371 : :
372 : : static void
373 : 18670 : check_label_used (tree label)
374 : : {
375 : 18670 : if (!processing_template_decl)
376 : : {
377 : 18423 : if (DECL_INITIAL (label) == NULL_TREE)
378 : : {
379 : 9 : location_t location;
380 : :
381 : 9 : error ("label %q+D used but not defined", label);
382 : 9 : location = input_location;
383 : : /* FIXME want (LOCATION_FILE (input_location), (line)0) */
384 : : /* Avoid crashing later. */
385 : 9 : define_label (location, DECL_NAME (label));
386 : : }
387 : : else
388 : 18414 : warn_for_unused_label (label);
389 : : }
390 : 18670 : }
391 : :
392 : : /* Helper function to sort named label entries in a vector by DECL_UID. */
393 : :
394 : : static int
395 : 226808 : sort_labels (const void *a, const void *b)
396 : : {
397 : 226808 : tree label1 = *(tree const *) a;
398 : 226808 : tree label2 = *(tree const *) b;
399 : :
400 : : /* DECL_UIDs can never be equal. */
401 : 226808 : return DECL_UID (label1) > DECL_UID (label2) ? -1 : +1;
402 : : }
403 : :
404 : : /* At the end of a function, all labels declared within the function
405 : : go out of scope. BLOCK is the top-level block for the
406 : : function. */
407 : :
408 : : static void
409 : 132649010 : pop_labels (tree block)
410 : : {
411 : 132649010 : if (!named_labels)
412 : 132645103 : return;
413 : :
414 : : /* We need to add the labels to the block chain, so debug
415 : : information is emitted. But, we want the order to be stable so
416 : : need to sort them first. Otherwise the debug output could be
417 : : randomly ordered. I guess it's mostly stable, unless the hash
418 : : table implementation changes. */
419 : 3907 : auto_vec<tree, 32> labels (named_labels->elements ());
420 : 3907 : hash_table<named_label_hash>::iterator end (named_labels->end ());
421 : 22556 : for (hash_table<named_label_hash>::iterator iter
422 : 45112 : (named_labels->begin ()); iter != end; ++iter)
423 : : {
424 : 18649 : named_label_entry *ent = *iter;
425 : :
426 : 18649 : gcc_checking_assert (!ent->outer);
427 : 18649 : if (ent->label_decl)
428 : 18475 : labels.quick_push (ent->label_decl);
429 : 18649 : ggc_free (ent);
430 : : }
431 : 3907 : named_labels = NULL;
432 : 3907 : labels.qsort (sort_labels);
433 : :
434 : 22382 : while (labels.length ())
435 : : {
436 : 18475 : tree label = labels.pop ();
437 : :
438 : 18475 : DECL_CHAIN (label) = BLOCK_VARS (block);
439 : 18475 : BLOCK_VARS (block) = label;
440 : :
441 : 18475 : check_label_used (label);
442 : : }
443 : 3907 : }
444 : :
445 : : /* At the end of a block with local labels, restore the outer definition. */
446 : :
447 : : static void
448 : 195 : pop_local_label (tree id, tree label)
449 : : {
450 : 195 : check_label_used (label);
451 : 195 : named_label_entry **slot = named_labels->find_slot_with_hash
452 : 195 : (id, IDENTIFIER_HASH_VALUE (id), NO_INSERT);
453 : 195 : named_label_entry *ent = *slot;
454 : :
455 : 195 : if (ent->outer)
456 : : ent = ent->outer;
457 : : else
458 : : {
459 : 186 : ent = ggc_cleared_alloc<named_label_entry> ();
460 : 186 : ent->name = id;
461 : : }
462 : 195 : *slot = ent;
463 : 195 : }
464 : :
465 : : /* The following two routines are used to interface to Objective-C++.
466 : : The binding level is purposely treated as an opaque type. */
467 : :
468 : : void *
469 : 0 : objc_get_current_scope (void)
470 : : {
471 : 0 : return current_binding_level;
472 : : }
473 : :
474 : : /* The following routine is used by the NeXT-style SJLJ exceptions;
475 : : variables get marked 'volatile' so as to not be clobbered by
476 : : _setjmp()/_longjmp() calls. All variables in the current scope,
477 : : as well as parent scopes up to (but not including) ENCLOSING_BLK
478 : : shall be thusly marked. */
479 : :
480 : : void
481 : 0 : objc_mark_locals_volatile (void *enclosing_blk)
482 : : {
483 : 0 : cp_binding_level *scope;
484 : :
485 : 0 : for (scope = current_binding_level;
486 : 0 : scope && scope != enclosing_blk;
487 : 0 : scope = scope->level_chain)
488 : : {
489 : 0 : tree decl;
490 : :
491 : 0 : for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
492 : 0 : objc_volatilize_decl (decl);
493 : :
494 : : /* Do not climb up past the current function. */
495 : 0 : if (scope->kind == sk_function_parms)
496 : : break;
497 : : }
498 : 0 : }
499 : :
500 : : /* True if B is the level for the condition of a constexpr if. */
501 : :
502 : : static bool
503 : 1674774 : level_for_constexpr_if (cp_binding_level *b)
504 : : {
505 : 1672171 : return (b->kind == sk_cond && b->this_entity
506 : 261 : && TREE_CODE (b->this_entity) == IF_STMT
507 : 1675035 : && IF_STMT_CONSTEXPR_P (b->this_entity));
508 : : }
509 : :
510 : : /* True if B is the level for the condition of a consteval if. */
511 : :
512 : : static bool
513 : 1674750 : level_for_consteval_if (cp_binding_level *b)
514 : : {
515 : 1672147 : return (b->kind == sk_cond && b->this_entity
516 : 237 : && TREE_CODE (b->this_entity) == IF_STMT
517 : 1674987 : && IF_STMT_CONSTEVAL_P (b->this_entity));
518 : : }
519 : :
520 : : /* True if T is a non-static VAR_DECL that has a non-trivial destructor.
521 : : See [stmt.dcl]/2. */
522 : :
523 : : static bool
524 : 25 : automatic_var_with_nontrivial_dtor_p (const_tree t)
525 : : {
526 : 25 : if (error_operand_p (t))
527 : : return false;
528 : :
529 : 19 : return (VAR_P (t)
530 : 19 : && decl_storage_duration (CONST_CAST_TREE (t)) == dk_auto
531 : 38 : && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (t)));
532 : : }
533 : :
534 : : /* Update data for defined and undefined labels when leaving a scope. */
535 : :
536 : : int
537 : 137603 : poplevel_named_label_1 (named_label_entry **slot, cp_binding_level *bl)
538 : : {
539 : 137603 : named_label_entry *ent = *slot;
540 : 137603 : cp_binding_level *obl = bl->level_chain;
541 : :
542 : 137603 : if (ent->binding_level == bl)
543 : : {
544 : 7592 : tree decl;
545 : :
546 : : /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
547 : : TREE_LISTs representing OVERLOADs, so be careful. */
548 : 10786 : for (decl = ent->names_in_scope; decl; decl = (DECL_P (decl)
549 : 3267 : ? DECL_CHAIN (decl)
550 : 73 : : TREE_CHAIN (decl)))
551 : 3194 : if (decl_jump_unsafe (decl))
552 : 1157 : vec_safe_push (ent->bad_decls, decl);
553 : :
554 : 7592 : ent->binding_level = obl;
555 : 7592 : ent->names_in_scope = obl->names;
556 : 7592 : switch (bl->kind)
557 : : {
558 : 42 : case sk_try:
559 : 42 : ent->in_try_scope = true;
560 : 42 : break;
561 : 27 : case sk_catch:
562 : 27 : ent->in_catch_scope = true;
563 : 27 : break;
564 : 245 : case sk_omp:
565 : 245 : ent->in_omp_scope = true;
566 : 245 : break;
567 : 3 : case sk_transaction:
568 : 3 : ent->in_transaction_scope = true;
569 : 3 : break;
570 : 33 : case sk_stmt_expr:
571 : 33 : ent->in_stmt_expr = true;
572 : 33 : break;
573 : 2795 : case sk_block:
574 : 2795 : if (level_for_constexpr_if (bl->level_chain))
575 : 15 : ent->in_constexpr_if = true;
576 : 2780 : else if (level_for_consteval_if (bl->level_chain))
577 : 30 : ent->in_consteval_if = true;
578 : : break;
579 : : default:
580 : : break;
581 : : }
582 : : }
583 : 130011 : else if (ent->uses)
584 : : {
585 : : struct named_label_use_entry *use;
586 : :
587 : 7101 : for (use = ent->uses; use ; use = use->next)
588 : 3967 : if (use->binding_level == bl)
589 : : {
590 : 1668 : if (auto &cg = use->computed_goto)
591 : : {
592 : 45 : if (bl->kind == sk_catch)
593 : 3 : vec_safe_push (cg, get_identifier ("catch"));
594 : 54 : for (tree d = use->names_in_scope; d; d = DECL_CHAIN (d))
595 : 9 : if (automatic_var_with_nontrivial_dtor_p (d))
596 : 6 : vec_safe_push (cg, d);
597 : : }
598 : :
599 : 1668 : use->binding_level = obl;
600 : 1668 : use->names_in_scope = obl->names;
601 : 1668 : if (bl->kind == sk_omp)
602 : 12 : use->in_omp_scope = true;
603 : : }
604 : : }
605 : :
606 : 137603 : return 1;
607 : : }
608 : :
609 : : /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
610 : : when errors were reported, except for -Werror-unused-but-set-*. */
611 : : static int unused_but_set_errorcount;
612 : :
613 : : /* Exit a binding level.
614 : : Pop the level off, and restore the state of the identifier-decl mappings
615 : : that were in effect when this level was entered.
616 : :
617 : : If KEEP == 1, this level had explicit declarations, so
618 : : and create a "block" (a BLOCK node) for the level
619 : : to record its declarations and subblocks for symbol table output.
620 : :
621 : : If FUNCTIONBODY is nonzero, this level is the body of a function,
622 : : so create a block as if KEEP were set and also clear out all
623 : : label names.
624 : :
625 : : If REVERSE is nonzero, reverse the order of decls before putting
626 : : them into the BLOCK. */
627 : :
628 : : tree
629 : 533470818 : poplevel (int keep, int reverse, int functionbody)
630 : : {
631 : 533470818 : tree link;
632 : : /* The chain of decls was accumulated in reverse order.
633 : : Put it into forward order, just for cleanliness. */
634 : 533470818 : tree decls;
635 : 533470818 : tree subblocks;
636 : 533470818 : tree block;
637 : 533470818 : tree decl;
638 : 533470818 : scope_kind kind;
639 : :
640 : 533470818 : auto_cond_timevar tv (TV_NAME_LOOKUP);
641 : 533471094 : restart:
642 : :
643 : 533471094 : block = NULL_TREE;
644 : :
645 : 533471094 : gcc_assert (current_binding_level->kind != sk_class
646 : : && current_binding_level->kind != sk_namespace);
647 : :
648 : 533471094 : if (current_binding_level->kind == sk_cleanup)
649 : : functionbody = 0;
650 : 533471094 : subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
651 : :
652 : 533471094 : gcc_assert (!vec_safe_length (current_binding_level->class_shadowed));
653 : :
654 : : /* We used to use KEEP == 2 to indicate that the new block should go
655 : : at the beginning of the list of blocks at this binding level,
656 : : rather than the end. This hack is no longer used. */
657 : 533471094 : gcc_assert (keep == 0 || keep == 1);
658 : :
659 : 533471094 : if (current_binding_level->keep)
660 : 6767779 : keep = 1;
661 : :
662 : : /* Any uses of undefined labels, and any defined labels, now operate
663 : : under constraints of next binding contour. */
664 : 533471094 : if (cfun && !functionbody && named_labels)
665 : 42486 : named_labels->traverse<cp_binding_level *, poplevel_named_label_1>
666 : 180089 : (current_binding_level);
667 : :
668 : : /* Get the decls in the order they were written.
669 : : Usually current_binding_level->names is in reverse order.
670 : : But parameter decls were previously put in forward order. */
671 : :
672 : 533471094 : decls = current_binding_level->names;
673 : 533471094 : if (reverse)
674 : : {
675 : 285406768 : decls = nreverse (decls);
676 : 285406768 : current_binding_level->names = decls;
677 : : }
678 : :
679 : : /* If there were any declarations or structure tags in that level,
680 : : or if this level is a function body,
681 : : create a BLOCK to record them for the life of this function. */
682 : 533471094 : block = NULL_TREE;
683 : : /* Avoid function body block if possible. */
684 : 566067086 : if (functionbody && subblocks && BLOCK_CHAIN (subblocks) == NULL_TREE)
685 : : keep = 0;
686 : 500875357 : else if (keep == 1 || functionbody)
687 : 165331485 : block = make_node (BLOCK);
688 : 165331485 : if (block != NULL_TREE)
689 : : {
690 : 165331485 : BLOCK_VARS (block) = decls;
691 : 165331485 : BLOCK_SUBBLOCKS (block) = subblocks;
692 : : }
693 : :
694 : : /* In each subblock, record that this is its superior. */
695 : 533471094 : if (keep >= 0)
696 : 598748730 : for (link = subblocks; link; link = BLOCK_CHAIN (link))
697 : 65277636 : BLOCK_SUPERCONTEXT (link) = block;
698 : :
699 : : /* Before we remove the declarations first check for unused variables. */
700 : 533471094 : if ((warn_unused_variable || warn_unused_but_set_variable)
701 : 6107499 : && current_binding_level->kind != sk_template_parms
702 : 5196522 : && !processing_template_decl)
703 : 6286093 : for (tree d = get_local_decls (); d; d = TREE_CHAIN (d))
704 : : {
705 : : /* There are cases where D itself is a TREE_LIST. See in
706 : : push_local_binding where the list of decls returned by
707 : : getdecls is built. */
708 : 3260015 : tree udecl = TREE_CODE (d) == TREE_LIST ? TREE_VALUE (d) : d;
709 : 3260015 : decl = strip_using_decl (udecl);
710 : :
711 : 3260015 : tree type = TREE_TYPE (decl);
712 : 3260015 : if (VAR_P (decl)
713 : 364728 : && (!TREE_USED (decl) || !DECL_READ_P (decl))
714 : 2776 : && !DECL_IN_SYSTEM_HEADER (udecl)
715 : : /* For structured bindings, consider only real variables, not
716 : : subobjects. */
717 : 2764 : && (DECL_DECOMPOSITION_P (decl) ? DECL_DECOMP_IS_BASE (decl)
718 : 2596 : : (DECL_NAME (decl) && !DECL_ARTIFICIAL (decl)))
719 : : /* Don't warn about name-independent declarations. */
720 : 586 : && !name_independent_decl_p (decl)
721 : 496 : && type != error_mark_node
722 : 3263243 : && (!CLASS_TYPE_P (type)
723 : 51 : || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
724 : 3 : || lookup_attribute ("warn_unused",
725 : 3 : TYPE_ATTRIBUTES (TREE_TYPE (decl)))))
726 : : {
727 : 464 : if (!TREE_USED (decl))
728 : : {
729 : 302 : if (TREE_CODE (udecl) == USING_DECL)
730 : 3 : warning_at (DECL_SOURCE_LOCATION (udecl),
731 : : OPT_Wunused_variable,
732 : : "unused using-declaration %qD", udecl);
733 : 299 : else if (!DECL_NAME (decl) && DECL_DECOMPOSITION_P (decl))
734 : 3 : warning_at (DECL_SOURCE_LOCATION (decl),
735 : : OPT_Wunused_variable,
736 : : "unused structured binding declaration");
737 : : else
738 : 296 : warning_at (DECL_SOURCE_LOCATION (decl),
739 : : OPT_Wunused_variable, "unused variable %qD", decl);
740 : 302 : suppress_warning (decl, OPT_Wunused_variable);
741 : : }
742 : 162 : else if (DECL_CONTEXT (decl) == current_function_decl
743 : : // For -Wunused-but-set-variable leave references alone.
744 : 138 : && !TYPE_REF_P (TREE_TYPE (decl))
745 : 300 : && errorcount == unused_but_set_errorcount)
746 : : {
747 : 129 : if (!DECL_NAME (decl) && DECL_DECOMPOSITION_P (decl))
748 : 12 : warning_at (DECL_SOURCE_LOCATION (decl),
749 : : OPT_Wunused_but_set_variable, "structured "
750 : : "binding declaration set but not used");
751 : : else
752 : 117 : warning_at (DECL_SOURCE_LOCATION (decl),
753 : : OPT_Wunused_but_set_variable,
754 : : "variable %qD set but not used", decl);
755 : 129 : unused_but_set_errorcount = errorcount;
756 : : }
757 : : }
758 : : }
759 : :
760 : : /* Remove declarations for all the DECLs in this level. */
761 : 1090399267 : for (link = decls; link; link = TREE_CHAIN (link))
762 : : {
763 : 556928173 : tree name;
764 : 556928173 : if (TREE_CODE (link) == TREE_LIST)
765 : : {
766 : 699206 : decl = TREE_VALUE (link);
767 : 699206 : name = TREE_PURPOSE (link);
768 : 699206 : gcc_checking_assert (name);
769 : : }
770 : : else
771 : : {
772 : 556228967 : decl = link;
773 : 556228967 : name = DECL_NAME (decl);
774 : : }
775 : :
776 : : /* Remove the binding. */
777 : 556928173 : if (TREE_CODE (decl) == LABEL_DECL)
778 : 195 : pop_local_label (name, decl);
779 : : else
780 : 556927978 : pop_local_binding (name, decl);
781 : : }
782 : :
783 : : /* Restore the IDENTIFIER_TYPE_VALUEs. */
784 : 533471094 : for (link = current_binding_level->type_shadowed;
785 : 727478525 : link; link = TREE_CHAIN (link))
786 : 194007431 : SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
787 : :
788 : : /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
789 : : list if a `using' declaration put them there. The debugging
790 : : back ends won't understand OVERLOAD, so we remove them here.
791 : : Because the BLOCK_VARS are (temporarily) shared with
792 : : CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
793 : : popped all the bindings. Also remove undeduced 'auto' decls,
794 : : which LTO doesn't understand, and can't have been used by anything. */
795 : 533471094 : if (block)
796 : : {
797 : 165331485 : tree* d;
798 : :
799 : 434116280 : for (d = &BLOCK_VARS (block); *d; )
800 : : {
801 : 268784795 : if (TREE_CODE (*d) == TREE_LIST
802 : 268784795 : || (!processing_template_decl
803 : 85816721 : && undeduced_auto_decl (*d)))
804 : 699234 : *d = TREE_CHAIN (*d);
805 : : else
806 : 268085561 : d = &DECL_CHAIN (*d);
807 : : }
808 : : }
809 : :
810 : : /* If the level being exited is the top level of a function,
811 : : check over all the labels. */
812 : 533471094 : if (functionbody)
813 : : {
814 : 132649010 : if (block)
815 : : {
816 : : /* Since this is the top level block of a function, the vars are
817 : : the function's parameters. Don't leave them in the BLOCK
818 : : because they are found in the FUNCTION_DECL instead. */
819 : 100053273 : BLOCK_VARS (block) = 0;
820 : 100053273 : pop_labels (block);
821 : : }
822 : : else
823 : 32595737 : pop_labels (subblocks);
824 : : }
825 : :
826 : 533471094 : kind = current_binding_level->kind;
827 : 533471094 : if (kind == sk_cleanup)
828 : : {
829 : 276 : tree stmt;
830 : :
831 : : /* If this is a temporary binding created for a cleanup, then we'll
832 : : have pushed a statement list level. Pop that, create a new
833 : : BIND_EXPR for the block, and insert it into the stream. */
834 : 276 : stmt = pop_stmt_list (current_binding_level->statement_list);
835 : 276 : stmt = c_build_bind_expr (input_location, block, stmt);
836 : 276 : add_stmt (stmt);
837 : : }
838 : :
839 : 533471094 : leave_scope ();
840 : 533471094 : if (functionbody)
841 : : {
842 : : /* The current function is being defined, so its DECL_INITIAL
843 : : should be error_mark_node. */
844 : 132649010 : gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
845 : 165244747 : DECL_INITIAL (current_function_decl) = block ? block : subblocks;
846 : 132649010 : if (subblocks)
847 : : {
848 : 66597373 : if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
849 : : {
850 : 7635972 : if (BLOCK_SUBBLOCKS (subblocks))
851 : 961455 : BLOCK_OUTER_CURLY_BRACE_P (BLOCK_SUBBLOCKS (subblocks)) = 1;
852 : : }
853 : : else
854 : 24960020 : BLOCK_OUTER_CURLY_BRACE_P (subblocks) = 1;
855 : : }
856 : : }
857 : 400822084 : else if (block)
858 : 65278212 : current_binding_level->blocks
859 : 130556424 : = block_chainon (current_binding_level->blocks, block);
860 : :
861 : : /* If we did not make a block for the level just exited,
862 : : any blocks made for inner levels
863 : : (since they cannot be recorded as subblocks in that level)
864 : : must be carried forward so they will later become subblocks
865 : : of something else. */
866 : 335543872 : else if (subblocks)
867 : 9 : current_binding_level->blocks
868 : 18 : = block_chainon (current_binding_level->blocks, subblocks);
869 : :
870 : : /* Each and every BLOCK node created here in `poplevel' is important
871 : : (e.g. for proper debugging information) so if we created one
872 : : earlier, mark it as "used". */
873 : 533471094 : if (block)
874 : 165331485 : TREE_USED (block) = 1;
875 : :
876 : : /* All temporary bindings created for cleanups are popped silently. */
877 : 533471094 : if (kind == sk_cleanup)
878 : 276 : goto restart;
879 : :
880 : 1066941636 : return block;
881 : 533470818 : }
882 : :
883 : : /* Call wrapup_globals_declarations for the globals in NAMESPACE. */
884 : : /* Diagnose odr-used extern inline variables without definitions
885 : : in the current TU. */
886 : :
887 : : int
888 : 134737 : wrapup_namespace_globals ()
889 : : {
890 : 134737 : if (vec<tree, va_gc> *statics = static_decls)
891 : : {
892 : 13665904 : for (tree decl : *statics)
893 : : {
894 : 13555013 : if (warn_unused_function
895 : 1004604 : && TREE_CODE (decl) == FUNCTION_DECL
896 : 759796 : && DECL_INITIAL (decl) == 0
897 : 2495 : && DECL_EXTERNAL (decl)
898 : 2495 : && !TREE_PUBLIC (decl)
899 : 19 : && !DECL_ARTIFICIAL (decl)
900 : 19 : && !DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
901 : 13555019 : && !warning_suppressed_p (decl, OPT_Wunused_function))
902 : 6 : warning_at (DECL_SOURCE_LOCATION (decl),
903 : : OPT_Wunused_function,
904 : : "%qF declared %<static%> but never defined", decl);
905 : :
906 : 13555013 : if (VAR_P (decl)
907 : 4045310 : && DECL_EXTERNAL (decl)
908 : 1940622 : && DECL_INLINE_VAR_P (decl)
909 : 13555031 : && DECL_ODR_USED (decl))
910 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
911 : : "odr-used inline variable %qD is not defined", decl);
912 : : }
913 : :
914 : : /* Clear out the list, so we don't rescan next time. */
915 : 110891 : static_decls = NULL;
916 : :
917 : : /* Write out any globals that need to be output. */
918 : 110891 : return wrapup_global_declarations (statics->address (),
919 : 110891 : statics->length ());
920 : : }
921 : : return 0;
922 : : }
923 : :
924 : : /* In C++, you don't have to write `struct S' to refer to `S'; you
925 : : can just use `S'. We accomplish this by creating a TYPE_DECL as
926 : : if the user had written `typedef struct S S'. Create and return
927 : : the TYPE_DECL for TYPE. */
928 : :
929 : : tree
930 : 139692077 : create_implicit_typedef (tree name, tree type)
931 : : {
932 : 139692077 : tree decl;
933 : :
934 : 139692077 : decl = build_decl (input_location, TYPE_DECL, name, type);
935 : 139692077 : DECL_ARTIFICIAL (decl) = 1;
936 : : /* There are other implicit type declarations, like the one *within*
937 : : a class that allows you to write `S::S'. We must distinguish
938 : : amongst these. */
939 : 139692077 : SET_DECL_IMPLICIT_TYPEDEF_P (decl);
940 : 139692077 : TYPE_NAME (type) = decl;
941 : 139692077 : TYPE_STUB_DECL (type) = decl;
942 : :
943 : 139692077 : return decl;
944 : : }
945 : :
946 : : /* Function-scope local entities that need discriminators. Each entry
947 : : is a {decl,name} pair. VAR_DECLs for anon unions get their name
948 : : smashed, so we cannot rely on DECL_NAME. */
949 : :
950 : : static GTY((deletable)) vec<tree, va_gc> *local_entities;
951 : :
952 : : /* Determine the mangling discriminator of local DECL. There are
953 : : generally very few of these in any particular function. */
954 : :
955 : : void
956 : 662687 : determine_local_discriminator (tree decl, tree name)
957 : : {
958 : 662687 : auto_cond_timevar tv (TV_NAME_LOOKUP);
959 : 662687 : retrofit_lang_decl (decl);
960 : 662687 : tree ctx = DECL_CONTEXT (decl);
961 : 662687 : size_t nelts = vec_safe_length (local_entities);
962 : 662687 : if (name == NULL_TREE)
963 : 662613 : name = (TREE_CODE (decl) == TYPE_DECL
964 : 1071664 : && TYPE_UNNAMED_P (TREE_TYPE (decl))
965 : 1194905 : ? NULL_TREE : DECL_NAME (decl));
966 : 19165359 : for (size_t i = 0; i < nelts; i += 2)
967 : : {
968 : 18503027 : tree *pair = &(*local_entities)[i];
969 : 18503027 : tree d = pair[0];
970 : 18503027 : tree n = pair[1];
971 : 18503027 : gcc_checking_assert (d != decl);
972 : 18503027 : if (name == n
973 : 3379068 : && TREE_CODE (decl) == TREE_CODE (d)
974 : 21882086 : && ctx == DECL_CONTEXT (d))
975 : : {
976 : 355 : tree disc = integer_one_node;
977 : 355 : if (DECL_DISCRIMINATOR (d))
978 : 179 : disc = build_int_cst (TREE_TYPE (disc),
979 : 179 : TREE_INT_CST_LOW (DECL_DISCRIMINATOR (d)) + 1);
980 : 355 : DECL_DISCRIMINATOR (decl) = disc;
981 : : /* Replace the saved decl. */
982 : 355 : pair[0] = decl;
983 : 355 : decl = NULL_TREE;
984 : 355 : break;
985 : : }
986 : : }
987 : :
988 : 662687 : if (decl)
989 : : {
990 : 662332 : vec_safe_reserve (local_entities, 2);
991 : 662332 : local_entities->quick_push (decl);
992 : 662332 : local_entities->quick_push (name);
993 : : }
994 : 662687 : }
995 : :
996 : :
997 : : /* True if DECL is a constrained hidden friend as per [temp.friend]/9:
998 : :
999 : : A non-template friend declaration with a requires-clause shall be a
1000 : : definition. A friend function template with a constraint that depends on a
1001 : : template parameter from an enclosing template shall be a definition. Such a
1002 : : constrained friend function or function template declaration does not
1003 : : declare the same function or function template as a declaration in any other
1004 : : scope.
1005 : :
1006 : : The ABI calls this a "member-like constrained friend" and mangles it like a
1007 : : member function to avoid collisions. */
1008 : :
1009 : : bool
1010 : 1299523687 : member_like_constrained_friend_p (tree decl)
1011 : : {
1012 : 1299523687 : return (TREE_CODE (decl) == FUNCTION_DECL
1013 : 402205382 : && DECL_UNIQUE_FRIEND_P (decl)
1014 : 71575196 : && DECL_FRIEND_CONTEXT (decl)
1015 : 31774623 : && get_constraints (decl)
1016 : 1299692880 : && (!DECL_TEMPLATE_INFO (decl)
1017 : 169193 : || !PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl))
1018 : 790 : || (uses_outer_template_parms_in_constraints
1019 : 790 : (most_general_template (decl)))));
1020 : : }
1021 : :
1022 : : /* Returns true if functions FN1 and FN2 have equivalent trailing
1023 : : requires clauses. */
1024 : :
1025 : : static bool
1026 : 9189599 : function_requirements_equivalent_p (tree newfn, tree oldfn)
1027 : : {
1028 : : /* [temp.friend]/9 "Such a constrained friend function does not declare the
1029 : : same function as a declaration in any other scope." So no need to
1030 : : actually compare the requirements. */
1031 : 9189599 : if (member_like_constrained_friend_p (newfn)
1032 : 9189599 : || member_like_constrained_friend_p (oldfn))
1033 : 107 : return false;
1034 : :
1035 : : /* Compare only trailing requirements. */
1036 : 9189492 : tree reqs1 = get_trailing_function_requirements (newfn);
1037 : 9189492 : tree reqs2 = get_trailing_function_requirements (oldfn);
1038 : 9189492 : if ((reqs1 != NULL_TREE) != (reqs2 != NULL_TREE))
1039 : : return false;
1040 : :
1041 : : /* Substitution is needed when friends are involved. */
1042 : 9151986 : reqs1 = maybe_substitute_reqs_for (reqs1, newfn);
1043 : 9151986 : reqs2 = maybe_substitute_reqs_for (reqs2, oldfn);
1044 : :
1045 : 9151986 : return cp_tree_equal (reqs1, reqs2);
1046 : : }
1047 : :
1048 : : /* Two functions of the same name correspond [basic.scope.scope] if
1049 : :
1050 : : + both declare functions with the same non-object-parameter-type-list,
1051 : : equivalent ([temp.over.link]) trailing requires-clauses (if any, except as
1052 : : specified in [temp.friend]), and, if both are non-static members, they have
1053 : : corresponding object parameters, or
1054 : :
1055 : : + both declare function templates with equivalent
1056 : : non-object-parameter-type-lists, return types (if any), template-heads, and
1057 : : trailing requires-clauses (if any), and, if both are non-static members,
1058 : : they have corresponding object parameters.
1059 : :
1060 : : This is a subset of decls_match: it identifies declarations that cannot be
1061 : : overloaded with one another. This function does not consider DECL_NAME. */
1062 : :
1063 : : bool
1064 : 120207195 : fns_correspond (tree newdecl, tree olddecl)
1065 : : {
1066 : 120207195 : if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1067 : : return false;
1068 : :
1069 : 110323780 : if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1070 : : {
1071 : 110304696 : if (!template_heads_equivalent_p (newdecl, olddecl))
1072 : : return 0;
1073 : 23433054 : newdecl = DECL_TEMPLATE_RESULT (newdecl);
1074 : 23433054 : olddecl = DECL_TEMPLATE_RESULT (olddecl);
1075 : : }
1076 : :
1077 : 23452138 : tree f1 = TREE_TYPE (newdecl);
1078 : 23452138 : tree f2 = TREE_TYPE (olddecl);
1079 : :
1080 : 23452138 : int rq1 = type_memfn_rqual (f1);
1081 : 23452138 : int rq2 = type_memfn_rqual (f2);
1082 : :
1083 : : /* If only one is a non-static member function, ignore ref-quals. */
1084 : 23452138 : if (TREE_CODE (f1) != TREE_CODE (f2))
1085 : : rq1 = rq2;
1086 : : /* Two non-static member functions have corresponding object parameters if:
1087 : : + exactly one is an implicit object member function with no ref-qualifier
1088 : : and the types of their object parameters ([dcl.fct]), after removing
1089 : : top-level references, are the same, or
1090 : : + their object parameters have the same type. */
1091 : : /* ??? We treat member functions of different classes as corresponding even
1092 : : though that means the object parameters have different types. */
1093 : 23452138 : else if ((rq1 == REF_QUAL_NONE) != (rq2 == REF_QUAL_NONE))
1094 : 0 : rq1 = rq2;
1095 : :
1096 : 23452138 : bool types_match = rq1 == rq2;
1097 : :
1098 : 23452138 : if (types_match)
1099 : : {
1100 : 23452138 : tree p1 = FUNCTION_FIRST_USER_PARMTYPE (newdecl);
1101 : 23452138 : tree p2 = FUNCTION_FIRST_USER_PARMTYPE (olddecl);
1102 : 23452138 : types_match = compparms (p1, p2);
1103 : : }
1104 : :
1105 : : /* Two function declarations match if either has a requires-clause
1106 : : then both have a requires-clause and their constraints-expressions
1107 : : are equivalent. */
1108 : 23452138 : if (types_match && flag_concepts)
1109 : 3463673 : types_match = function_requirements_equivalent_p (newdecl, olddecl);
1110 : :
1111 : : return types_match;
1112 : : }
1113 : :
1114 : : /* Subroutine of duplicate_decls: return truthvalue of whether
1115 : : or not types of these decls match.
1116 : :
1117 : : For C++, we must compare the parameter list so that `int' can match
1118 : : `int&' in a parameter position, but `int&' is not confused with
1119 : : `const int&'. */
1120 : :
1121 : : int
1122 : 883484998 : decls_match (tree newdecl, tree olddecl, bool record_versions /* = true */)
1123 : : {
1124 : 883484998 : int types_match;
1125 : :
1126 : 883484998 : if (newdecl == olddecl)
1127 : : return 1;
1128 : :
1129 : 883429258 : if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1130 : : /* If the two DECLs are not even the same kind of thing, we're not
1131 : : interested in their types. */
1132 : : return 0;
1133 : :
1134 : 435467305 : gcc_assert (DECL_P (newdecl));
1135 : :
1136 : 435467305 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
1137 : : {
1138 : : /* Specializations of different templates are different functions
1139 : : even if they have the same type. */
1140 : 241576682 : tree t1 = (DECL_USE_TEMPLATE (newdecl)
1141 : 241576682 : ? DECL_TI_TEMPLATE (newdecl)
1142 : 241576682 : : NULL_TREE);
1143 : 241576682 : tree t2 = (DECL_USE_TEMPLATE (olddecl)
1144 : 241576682 : ? DECL_TI_TEMPLATE (olddecl)
1145 : 241576682 : : NULL_TREE);
1146 : 241576682 : if (t1 != t2)
1147 : : return 0;
1148 : :
1149 : 239114067 : if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1150 : 242134240 : && ! (DECL_EXTERN_C_P (newdecl)
1151 : 3020173 : && DECL_EXTERN_C_P (olddecl)))
1152 : : return 0;
1153 : :
1154 : : /* A new declaration doesn't match a built-in one unless it
1155 : : is also extern "C". */
1156 : 220936665 : if (DECL_IS_UNDECLARED_BUILTIN (olddecl)
1157 : 220936665 : && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
1158 : : return 0;
1159 : :
1160 : 220276558 : tree f1 = TREE_TYPE (newdecl);
1161 : 220276558 : tree f2 = TREE_TYPE (olddecl);
1162 : 220276558 : if (TREE_CODE (f1) != TREE_CODE (f2))
1163 : : return 0;
1164 : :
1165 : : /* A declaration with deduced return type should use its pre-deduction
1166 : : type for declaration matching. */
1167 : 220118576 : tree r2 = fndecl_declared_return_type (olddecl);
1168 : 220118576 : tree r1 = fndecl_declared_return_type (newdecl);
1169 : :
1170 : : /* For memchr et al, allow const void* return type (as specified by C++)
1171 : : when we expect void* (as in C). */
1172 : 220118576 : if (DECL_IS_UNDECLARED_BUILTIN (olddecl)
1173 : 6016031 : && DECL_EXTERN_C_P (olddecl)
1174 : 3752576 : && !same_type_p (r1, r2)
1175 : 70 : && TREE_CODE (r1) == POINTER_TYPE
1176 : 15 : && TREE_CODE (r2) == POINTER_TYPE
1177 : 220118588 : && comp_ptr_ttypes (TREE_TYPE (r1), TREE_TYPE (r2)))
1178 : : r2 = r1;
1179 : :
1180 : 220118576 : tree p1 = TYPE_ARG_TYPES (f1);
1181 : 220118576 : tree p2 = TYPE_ARG_TYPES (f2);
1182 : :
1183 : 220118576 : if (same_type_p (r1, r2))
1184 : : {
1185 : 161647673 : if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
1186 : 161647643 : && fndecl_built_in_p (olddecl))
1187 : : {
1188 : 50 : types_match = self_promoting_args_p (p1);
1189 : 50 : if (p1 == void_list_node)
1190 : 3 : TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1191 : : }
1192 : : else
1193 : 161647534 : types_match =
1194 : 161647534 : compparms (p1, p2)
1195 : 25152761 : && type_memfn_rqual (f1) == type_memfn_rqual (f2)
1196 : 186800068 : && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1197 : 1174481 : || comp_type_attributes (TREE_TYPE (newdecl),
1198 : 1174481 : TREE_TYPE (olddecl)) != 0);
1199 : : }
1200 : : else
1201 : : types_match = 0;
1202 : :
1203 : : /* Two function declarations match if either has a requires-clause
1204 : : then both have a requires-clause and their constraints-expressions
1205 : : are equivalent. */
1206 : 25152575 : if (types_match && flag_concepts)
1207 : 5725900 : types_match = function_requirements_equivalent_p (newdecl, olddecl);
1208 : :
1209 : : /* The decls dont match if they correspond to two different versions
1210 : : of the same function. Disallow extern "C" functions to be
1211 : : versions for now. */
1212 : 25152575 : if (types_match
1213 : 25101400 : && !DECL_EXTERN_C_P (newdecl)
1214 : 19473535 : && !DECL_EXTERN_C_P (olddecl)
1215 : 44622350 : && targetm.target_option.function_versions (newdecl, olddecl))
1216 : : {
1217 : 8472 : if (record_versions)
1218 : 16794 : maybe_version_functions (newdecl, olddecl,
1219 : 8397 : (!DECL_FUNCTION_VERSIONED (newdecl)
1220 : 15984 : || !DECL_FUNCTION_VERSIONED (olddecl)));
1221 : 8472 : return 0;
1222 : : }
1223 : : }
1224 : 193890623 : else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1225 : : {
1226 : 192537726 : if (!template_heads_equivalent_p (newdecl, olddecl))
1227 : : return 0;
1228 : :
1229 : 61695553 : tree oldres = DECL_TEMPLATE_RESULT (olddecl);
1230 : 61695553 : tree newres = DECL_TEMPLATE_RESULT (newdecl);
1231 : :
1232 : 61695553 : if (TREE_CODE (newres) != TREE_CODE (oldres))
1233 : : return 0;
1234 : :
1235 : : /* Two template types match if they are the same. Otherwise, compare
1236 : : the underlying declarations. */
1237 : 61695547 : if (TREE_CODE (newres) == TYPE_DECL)
1238 : 30 : types_match = same_type_p (TREE_TYPE (newres), TREE_TYPE (oldres));
1239 : : else
1240 : 61695517 : types_match = decls_match (newres, oldres);
1241 : : }
1242 : : else
1243 : : {
1244 : : /* Need to check scope for variable declaration (VAR_DECL).
1245 : : For typedef (TYPE_DECL), scope is ignored. */
1246 : 1352897 : if (VAR_P (newdecl)
1247 : 903586 : && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1248 : : /* [dcl.link]
1249 : : Two declarations for an object with C language linkage
1250 : : with the same name (ignoring the namespace that qualify
1251 : : it) that appear in different namespace scopes refer to
1252 : : the same object. */
1253 : 1511695 : && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1254 : : return 0;
1255 : :
1256 : 1194147 : if (TREE_TYPE (newdecl) == error_mark_node)
1257 : 3 : types_match = TREE_TYPE (olddecl) == error_mark_node;
1258 : 1194144 : else if (TREE_TYPE (olddecl) == NULL_TREE)
1259 : 0 : types_match = TREE_TYPE (newdecl) == NULL_TREE;
1260 : 1194144 : else if (TREE_TYPE (newdecl) == NULL_TREE)
1261 : : types_match = 0;
1262 : : else
1263 : 1194144 : types_match = comptypes (TREE_TYPE (newdecl),
1264 : 1194144 : TREE_TYPE (olddecl),
1265 : : COMPARE_REDECLARATION);
1266 : : }
1267 : :
1268 : : return types_match;
1269 : : }
1270 : :
1271 : : /* Mark DECL as versioned if it isn't already. */
1272 : :
1273 : : static void
1274 : 16884 : maybe_mark_function_versioned (tree decl)
1275 : : {
1276 : 16884 : if (!DECL_FUNCTION_VERSIONED (decl))
1277 : : {
1278 : 954 : DECL_FUNCTION_VERSIONED (decl) = 1;
1279 : : /* If DECL_ASSEMBLER_NAME has already been set, re-mangle
1280 : : to include the version marker. */
1281 : 954 : if (DECL_ASSEMBLER_NAME_SET_P (decl))
1282 : 33 : mangle_decl (decl);
1283 : : }
1284 : 16884 : }
1285 : :
1286 : : /* NEWDECL and OLDDECL have identical signatures. If they are
1287 : : different versions adjust them and return true.
1288 : : If RECORD is set to true, record function versions. */
1289 : :
1290 : : bool
1291 : 149502 : maybe_version_functions (tree newdecl, tree olddecl, bool record)
1292 : : {
1293 : 149502 : if (!targetm.target_option.function_versions (newdecl, olddecl))
1294 : : return false;
1295 : :
1296 : 8424 : maybe_mark_function_versioned (olddecl);
1297 : 8424 : if (DECL_LOCAL_DECL_P (olddecl))
1298 : : {
1299 : 18 : olddecl = DECL_LOCAL_DECL_ALIAS (olddecl);
1300 : 18 : maybe_mark_function_versioned (olddecl);
1301 : : }
1302 : :
1303 : 8424 : maybe_mark_function_versioned (newdecl);
1304 : 8424 : if (DECL_LOCAL_DECL_P (newdecl))
1305 : : {
1306 : : /* Unfortunately, we can get here before pushdecl naturally calls
1307 : : push_local_extern_decl_alias, so we need to call it directly. */
1308 : 18 : if (!DECL_LOCAL_DECL_ALIAS (newdecl))
1309 : 6 : push_local_extern_decl_alias (newdecl);
1310 : 18 : newdecl = DECL_LOCAL_DECL_ALIAS (newdecl);
1311 : 18 : maybe_mark_function_versioned (newdecl);
1312 : : }
1313 : :
1314 : 8424 : if (record)
1315 : 837 : cgraph_node::record_function_versions (olddecl, newdecl);
1316 : :
1317 : : return true;
1318 : : }
1319 : :
1320 : : /* If NEWDECL is `static' and an `extern' was seen previously,
1321 : : warn about it. OLDDECL is the previous declaration.
1322 : :
1323 : : Note that this does not apply to the C++ case of declaring
1324 : : a variable `extern const' and then later `const'.
1325 : :
1326 : : Don't complain about built-in functions, since they are beyond
1327 : : the user's control. */
1328 : :
1329 : : void
1330 : 17299504 : warn_extern_redeclared_static (tree newdecl, tree olddecl)
1331 : : {
1332 : 17299504 : if (TREE_CODE (newdecl) == TYPE_DECL
1333 : 17277329 : || TREE_CODE (newdecl) == TEMPLATE_DECL
1334 : 13879415 : || TREE_CODE (newdecl) == CONST_DECL
1335 : 13879415 : || TREE_CODE (newdecl) == NAMESPACE_DECL)
1336 : 17299492 : return;
1337 : :
1338 : : /* Don't get confused by static member functions; that's a different
1339 : : use of `static'. */
1340 : 13879415 : if (TREE_CODE (newdecl) == FUNCTION_DECL
1341 : 13879415 : && DECL_STATIC_FUNCTION_P (newdecl))
1342 : : return;
1343 : :
1344 : : /* If the old declaration was `static', or the new one isn't, then
1345 : : everything is OK. */
1346 : 13725335 : if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1347 : : return;
1348 : :
1349 : : /* It's OK to declare a builtin function as `static'. */
1350 : 12 : if (TREE_CODE (olddecl) == FUNCTION_DECL
1351 : 12 : && DECL_ARTIFICIAL (olddecl))
1352 : : return;
1353 : :
1354 : 12 : auto_diagnostic_group d;
1355 : 12 : if (permerror (DECL_SOURCE_LOCATION (newdecl),
1356 : : "%qD was declared %<extern%> and later %<static%>", newdecl))
1357 : 12 : inform (DECL_SOURCE_LOCATION (olddecl),
1358 : : "previous declaration of %qD", olddecl);
1359 : 12 : }
1360 : :
1361 : : /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1362 : : function templates. If their exception specifications do not
1363 : : match, issue a diagnostic. */
1364 : :
1365 : : static void
1366 : 16905301 : check_redeclaration_exception_specification (tree new_decl,
1367 : : tree old_decl)
1368 : : {
1369 : 16905301 : tree new_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl));
1370 : 16905301 : tree old_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl));
1371 : :
1372 : : /* Two default specs are equivalent, don't force evaluation. */
1373 : 5850430 : if (UNEVALUATED_NOEXCEPT_SPEC_P (new_exceptions)
1374 : 17049899 : && UNEVALUATED_NOEXCEPT_SPEC_P (old_exceptions))
1375 : : return;
1376 : :
1377 : 16895365 : if (!type_dependent_expression_p (old_decl))
1378 : : {
1379 : 9654539 : maybe_instantiate_noexcept (new_decl);
1380 : 9654539 : maybe_instantiate_noexcept (old_decl);
1381 : : }
1382 : 16895365 : new_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (new_decl));
1383 : 16895365 : old_exceptions = TYPE_RAISES_EXCEPTIONS (TREE_TYPE (old_decl));
1384 : :
1385 : : /* [except.spec]
1386 : :
1387 : : If any declaration of a function has an exception-specification,
1388 : : all declarations, including the definition and an explicit
1389 : : specialization, of that function shall have an
1390 : : exception-specification with the same set of type-ids. */
1391 : 16895365 : if (!DECL_IS_UNDECLARED_BUILTIN (old_decl)
1392 : 13268211 : && !DECL_IS_UNDECLARED_BUILTIN (new_decl)
1393 : 30163492 : && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1394 : : {
1395 : 325 : const char *const msg
1396 : : = G_("declaration of %qF has a different exception specifier");
1397 : 325 : bool complained = true;
1398 : 325 : location_t new_loc = DECL_SOURCE_LOCATION (new_decl);
1399 : 325 : auto_diagnostic_group d;
1400 : :
1401 : 325 : if (DECL_IN_SYSTEM_HEADER (old_decl) && DECL_EXTERN_C_P (old_decl))
1402 : : /* Don't fuss about the C library; the C library functions are not
1403 : : specified to have exception specifications (just behave as if they
1404 : : have them), but some implementations include them. */
1405 : 233 : complained = pedwarn (new_loc, OPT_Wsystem_headers, msg, new_decl);
1406 : 92 : else if (!flag_exceptions)
1407 : : /* We used to silently permit mismatched eh specs with
1408 : : -fno-exceptions, so only complain if -pedantic. */
1409 : 3 : complained = pedwarn (new_loc, OPT_Wpedantic, msg, new_decl);
1410 : 89 : else if (!new_exceptions)
1411 : : /* Reduce to pedwarn for omitted exception specification. No warning
1412 : : flag for this; silence the warning by correcting the code. */
1413 : 20 : complained = pedwarn (new_loc, 0, msg, new_decl);
1414 : : else
1415 : 69 : error_at (new_loc, msg, new_decl);
1416 : :
1417 : 325 : if (complained)
1418 : 95 : inform (DECL_SOURCE_LOCATION (old_decl),
1419 : : "from previous declaration %qF", old_decl);
1420 : :
1421 : : /* Copy the old exception specification if new_decl has none. Unless the
1422 : : old decl is extern "C", as obscure code might depend on the type of
1423 : : the new declaration (e.g. noexcept-type19.C). */
1424 : 325 : if (!new_exceptions && !DECL_EXTERN_C_P (old_decl))
1425 : 20 : TREE_TYPE (new_decl)
1426 : 40 : = build_exception_variant (TREE_TYPE (new_decl), old_exceptions);
1427 : 325 : }
1428 : : }
1429 : :
1430 : : /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1431 : : Otherwise issue diagnostics. */
1432 : :
1433 : : bool
1434 : 17299985 : validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1435 : : {
1436 : 17299985 : old_decl = STRIP_TEMPLATE (old_decl);
1437 : 17299985 : new_decl = STRIP_TEMPLATE (new_decl);
1438 : 17299985 : if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1439 : 17277786 : || !VAR_OR_FUNCTION_DECL_P (new_decl))
1440 : : return true;
1441 : 17277786 : if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1442 : 17277786 : == DECL_DECLARED_CONSTEXPR_P (new_decl))
1443 : : {
1444 : 17242644 : if (TREE_CODE (old_decl) != FUNCTION_DECL)
1445 : : return true;
1446 : 33811374 : if (DECL_IMMEDIATE_FUNCTION_P (old_decl)
1447 : 16905687 : == DECL_IMMEDIATE_FUNCTION_P (new_decl))
1448 : : return true;
1449 : : }
1450 : 35148 : if (TREE_CODE (old_decl) == FUNCTION_DECL)
1451 : : {
1452 : : /* With -fimplicit-constexpr, ignore changes in the constexpr
1453 : : keyword. */
1454 : 61 : if (flag_implicit_constexpr
1455 : 61 : && (DECL_IMMEDIATE_FUNCTION_P (new_decl)
1456 : 0 : == DECL_IMMEDIATE_FUNCTION_P (old_decl)))
1457 : : return true;
1458 : 61 : if (fndecl_built_in_p (old_decl))
1459 : : {
1460 : : /* Hide a built-in declaration. */
1461 : 0 : DECL_DECLARED_CONSTEXPR_P (old_decl)
1462 : 0 : = DECL_DECLARED_CONSTEXPR_P (new_decl);
1463 : 0 : if (DECL_IMMEDIATE_FUNCTION_P (new_decl))
1464 : 0 : SET_DECL_IMMEDIATE_FUNCTION_P (old_decl);
1465 : 0 : return true;
1466 : : }
1467 : : /* 7.1.5 [dcl.constexpr]
1468 : : Note: An explicit specialization can differ from the template
1469 : : declaration with respect to the constexpr specifier. */
1470 : 61 : if (! DECL_TEMPLATE_SPECIALIZATION (old_decl)
1471 : 61 : && DECL_TEMPLATE_SPECIALIZATION (new_decl))
1472 : : return true;
1473 : :
1474 : 42 : const char *kind = "constexpr";
1475 : 42 : if (DECL_IMMEDIATE_FUNCTION_P (old_decl)
1476 : 72 : || DECL_IMMEDIATE_FUNCTION_P (new_decl))
1477 : : kind = "consteval";
1478 : 42 : auto_diagnostic_group d;
1479 : 42 : error_at (DECL_SOURCE_LOCATION (new_decl),
1480 : : "redeclaration %qD differs in %qs "
1481 : : "from previous declaration", new_decl,
1482 : : kind);
1483 : 42 : inform (DECL_SOURCE_LOCATION (old_decl),
1484 : : "previous declaration %qD", old_decl);
1485 : 42 : return false;
1486 : 42 : }
1487 : : return true;
1488 : : }
1489 : :
1490 : : /* DECL is a redeclaration of a function or function template. If
1491 : : it does have default arguments issue a diagnostic. Note: this
1492 : : function is used to enforce the requirements in C++11 8.3.6 about
1493 : : no default arguments in redeclarations. */
1494 : :
1495 : : static void
1496 : 10713282 : check_redeclaration_no_default_args (tree decl)
1497 : : {
1498 : 10713282 : gcc_assert (DECL_DECLARES_FUNCTION_P (decl));
1499 : :
1500 : 10713282 : for (tree t = FUNCTION_FIRST_USER_PARMTYPE (decl);
1501 : 31496558 : t && t != void_list_node; t = TREE_CHAIN (t))
1502 : 20783330 : if (TREE_PURPOSE (t))
1503 : : {
1504 : 54 : permerror (DECL_SOURCE_LOCATION (decl),
1505 : : "redeclaration of %q#D may not have default "
1506 : : "arguments", decl);
1507 : 54 : return;
1508 : : }
1509 : : }
1510 : :
1511 : : /* NEWDECL is a redeclaration of a function or function template OLDDECL,
1512 : : in any case represented as FUNCTION_DECLs (the DECL_TEMPLATE_RESULTs of
1513 : : the TEMPLATE_DECLs in case of function templates). This function is used
1514 : : to enforce the final part of C++17 11.3.6/4, about a single declaration:
1515 : : "If a friend declaration specifies a default argument expression, that
1516 : : declaration shall be a definition and shall be the only declaration of
1517 : : the function or function template in the translation unit." */
1518 : :
1519 : : static void
1520 : 5364196 : check_no_redeclaration_friend_default_args (tree olddecl, tree newdecl)
1521 : : {
1522 : 10387337 : if (!DECL_UNIQUE_FRIEND_P (olddecl) && !DECL_UNIQUE_FRIEND_P (newdecl))
1523 : : return;
1524 : :
1525 : 1901774 : for (tree t1 = FUNCTION_FIRST_USER_PARMTYPE (olddecl),
1526 : 950887 : t2 = FUNCTION_FIRST_USER_PARMTYPE (newdecl);
1527 : 2549912 : t1 && t1 != void_list_node;
1528 : 1599025 : t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1529 : 2245041 : if ((DECL_UNIQUE_FRIEND_P (olddecl) && TREE_PURPOSE (t1))
1530 : 4377731 : || (DECL_UNIQUE_FRIEND_P (newdecl) && TREE_PURPOSE (t2)))
1531 : : {
1532 : 21 : auto_diagnostic_group d;
1533 : 21 : if (permerror (DECL_SOURCE_LOCATION (newdecl),
1534 : : "friend declaration of %q#D specifies default "
1535 : : "arguments and isn%'t the only declaration", newdecl))
1536 : 21 : inform (DECL_SOURCE_LOCATION (olddecl),
1537 : : "previous declaration of %q#D", olddecl);
1538 : 21 : return;
1539 : 21 : }
1540 : : }
1541 : :
1542 : : /* Merge tree bits that correspond to attributes noreturn, nothrow,
1543 : : const, malloc, and pure from NEWDECL with those of OLDDECL. */
1544 : :
1545 : : static void
1546 : 16351023 : merge_attribute_bits (tree newdecl, tree olddecl)
1547 : : {
1548 : 16351023 : TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1549 : 16351023 : TREE_THIS_VOLATILE (olddecl) |= TREE_THIS_VOLATILE (newdecl);
1550 : 16351023 : TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1551 : 16351023 : TREE_NOTHROW (olddecl) |= TREE_NOTHROW (newdecl);
1552 : 16351023 : TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1553 : 16351023 : TREE_READONLY (olddecl) |= TREE_READONLY (newdecl);
1554 : 16351023 : DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1555 : 16351023 : DECL_IS_MALLOC (olddecl) |= DECL_IS_MALLOC (newdecl);
1556 : 16351023 : DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1557 : 16351023 : DECL_PURE_P (olddecl) |= DECL_PURE_P (newdecl);
1558 : 16351023 : DECL_UNINLINABLE (newdecl) |= DECL_UNINLINABLE (olddecl);
1559 : 16351023 : DECL_UNINLINABLE (olddecl) |= DECL_UNINLINABLE (newdecl);
1560 : 16351023 : TREE_DEPRECATED (newdecl) |= TREE_DEPRECATED (olddecl);
1561 : 16351023 : TREE_DEPRECATED (olddecl) |= TREE_DEPRECATED (newdecl);
1562 : 16351023 : TREE_UNAVAILABLE (newdecl) |= TREE_UNAVAILABLE (olddecl);
1563 : 16351023 : TREE_UNAVAILABLE (olddecl) |= TREE_UNAVAILABLE (newdecl);
1564 : 16351023 : }
1565 : :
1566 : : #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1567 : : && lookup_attribute ("gnu_inline", \
1568 : : DECL_ATTRIBUTES (fn)))
1569 : :
1570 : : /* A subroutine of duplicate_decls. Emits a diagnostic when newdecl
1571 : : ambiguates olddecl. Returns true if an error occurs. */
1572 : :
1573 : : static bool
1574 : 189139746 : duplicate_function_template_decls (tree newdecl, tree olddecl)
1575 : : {
1576 : 189139746 : tree newres = DECL_TEMPLATE_RESULT (newdecl);
1577 : 189139746 : tree oldres = DECL_TEMPLATE_RESULT (olddecl);
1578 : : /* Function template declarations can be differentiated by parameter
1579 : : and return type. */
1580 : 189139746 : if (compparms (TYPE_ARG_TYPES (TREE_TYPE (oldres)),
1581 : 189139746 : TYPE_ARG_TYPES (TREE_TYPE (newres)))
1582 : 189139746 : && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1583 : : TREE_TYPE (TREE_TYPE (olddecl))))
1584 : : {
1585 : : /* ... and also by their template-heads and requires-clauses. */
1586 : 3090 : if (template_heads_equivalent_p (newdecl, olddecl)
1587 : 3090 : && function_requirements_equivalent_p (newres, oldres))
1588 : : {
1589 : 0 : auto_diagnostic_group d;
1590 : 0 : error ("ambiguating new declaration %q+#D", newdecl);
1591 : 0 : inform (DECL_SOURCE_LOCATION (olddecl),
1592 : : "old declaration %q#D", olddecl);
1593 : 0 : return true;
1594 : 0 : }
1595 : :
1596 : : /* FIXME: The types are the same but the are differences
1597 : : in either the template heads or function requirements.
1598 : : We should be able to diagnose a set of common errors
1599 : : stemming from these declarations. For example:
1600 : :
1601 : : template<typename T> requires C void f(...);
1602 : : template<typename T> void f(...) requires C;
1603 : :
1604 : : These are functionally equivalent but not equivalent. */
1605 : : }
1606 : :
1607 : : return false;
1608 : : }
1609 : :
1610 : : /* OLD_PARMS is the innermost set of template parameters for some template
1611 : : declaration, and NEW_PARMS is the corresponding set of template parameters
1612 : : for a redeclaration of that template. Merge the default arguments within
1613 : : these two sets of parameters. CLASS_P is true iff the template in
1614 : : question is a class template. */
1615 : :
1616 : : bool
1617 : 7599901 : merge_default_template_args (tree new_parms, tree old_parms, bool class_p)
1618 : : {
1619 : 7599901 : gcc_checking_assert (TREE_VEC_LENGTH (new_parms)
1620 : : == TREE_VEC_LENGTH (old_parms));
1621 : 21495178 : for (int i = 0; i < TREE_VEC_LENGTH (new_parms); i++)
1622 : : {
1623 : 13895289 : tree new_parm = TREE_VALUE (TREE_VEC_ELT (new_parms, i));
1624 : 13895289 : tree old_parm = TREE_VALUE (TREE_VEC_ELT (old_parms, i));
1625 : 13895289 : tree& new_default = TREE_PURPOSE (TREE_VEC_ELT (new_parms, i));
1626 : 13895289 : tree& old_default = TREE_PURPOSE (TREE_VEC_ELT (old_parms, i));
1627 : 13895289 : if (error_operand_p (new_parm) || error_operand_p (old_parm))
1628 : : return false;
1629 : 13895286 : if (new_default != NULL_TREE && old_default != NULL_TREE)
1630 : : {
1631 : 9 : auto_diagnostic_group d;
1632 : 9 : error ("redefinition of default argument for %q+#D", new_parm);
1633 : 9 : inform (DECL_SOURCE_LOCATION (old_parm),
1634 : : "original definition appeared here");
1635 : 9 : return false;
1636 : 9 : }
1637 : 13895277 : else if (new_default != NULL_TREE)
1638 : : /* Update the previous template parameters (which are the ones
1639 : : that will really count) with the new default value. */
1640 : 186817 : old_default = new_default;
1641 : 13708460 : else if (class_p && old_default != NULL_TREE)
1642 : : /* Update the new parameters, too; they'll be used as the
1643 : : parameters for any members. */
1644 : 928011 : new_default = old_default;
1645 : : }
1646 : : return true;
1647 : : }
1648 : :
1649 : : /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1650 : : If the redeclaration is invalid, a diagnostic is issued, and the
1651 : : error_mark_node is returned. Otherwise, OLDDECL is returned.
1652 : :
1653 : : If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1654 : : returned.
1655 : :
1656 : : HIDING is true if the new decl is being hidden. WAS_HIDDEN is true
1657 : : if the old decl was hidden.
1658 : :
1659 : : Hidden decls can be anticipated builtins, injected friends, or
1660 : : (coming soon) injected from a local-extern decl. */
1661 : :
1662 : : tree
1663 : 319554280 : duplicate_decls (tree newdecl, tree olddecl, bool hiding, bool was_hidden)
1664 : : {
1665 : 319554280 : unsigned olddecl_uid = DECL_UID (olddecl);
1666 : 319554280 : int types_match = 0;
1667 : 319554280 : int new_defines_function = 0;
1668 : 319554280 : tree new_template_info;
1669 : 319554280 : location_t olddecl_loc = DECL_SOURCE_LOCATION (olddecl);
1670 : 319554280 : location_t newdecl_loc = DECL_SOURCE_LOCATION (newdecl);
1671 : :
1672 : 319554280 : if (newdecl == olddecl)
1673 : : return olddecl;
1674 : :
1675 : 318728299 : types_match = decls_match (newdecl, olddecl);
1676 : :
1677 : : /* If either the type of the new decl or the type of the old decl is an
1678 : : error_mark_node, then that implies that we have already issued an
1679 : : error (earlier) for some bogus type specification, and in that case,
1680 : : it is rather pointless to harass the user with yet more error message
1681 : : about the same declaration, so just pretend the types match here. */
1682 : 318728299 : if (TREE_TYPE (newdecl) == error_mark_node
1683 : 318728299 : || TREE_TYPE (olddecl) == error_mark_node)
1684 : : return error_mark_node;
1685 : :
1686 : : /* Check for redeclaration and other discrepancies. */
1687 : 318728273 : if (TREE_CODE (olddecl) == FUNCTION_DECL
1688 : 318728273 : && DECL_IS_UNDECLARED_BUILTIN (olddecl))
1689 : : {
1690 : 5881682 : if (TREE_CODE (newdecl) != FUNCTION_DECL)
1691 : : {
1692 : : /* Avoid warnings redeclaring built-ins which have not been
1693 : : explicitly declared. */
1694 : 179106 : if (was_hidden)
1695 : : {
1696 : 179078 : if (TREE_PUBLIC (newdecl)
1697 : 179078 : && CP_DECL_CONTEXT (newdecl) == global_namespace)
1698 : 12 : warning_at (newdecl_loc,
1699 : : OPT_Wbuiltin_declaration_mismatch,
1700 : : "built-in function %qD declared as non-function",
1701 : : newdecl);
1702 : 179078 : return NULL_TREE;
1703 : : }
1704 : :
1705 : : /* If you declare a built-in or predefined function name as static,
1706 : : the old definition is overridden, but optionally warn this was a
1707 : : bad choice of name. */
1708 : 28 : if (! TREE_PUBLIC (newdecl))
1709 : : {
1710 : 56 : warning_at (newdecl_loc,
1711 : : OPT_Wshadow,
1712 : 28 : fndecl_built_in_p (olddecl)
1713 : : ? G_("shadowing built-in function %q#D")
1714 : : : G_("shadowing library function %q#D"), olddecl);
1715 : : /* Discard the old built-in function. */
1716 : 28 : return NULL_TREE;
1717 : : }
1718 : : /* If the built-in is not ansi, then programs can override
1719 : : it even globally without an error. */
1720 : 0 : else if (! fndecl_built_in_p (olddecl))
1721 : 0 : warning_at (newdecl_loc, 0,
1722 : : "library function %q#D redeclared as non-function %q#D",
1723 : : olddecl, newdecl);
1724 : : else
1725 : 0 : error_at (newdecl_loc,
1726 : : "declaration of %q#D conflicts with built-in "
1727 : : "declaration %q#D", newdecl, olddecl);
1728 : 0 : return NULL_TREE;
1729 : : }
1730 : 5702576 : else if (!types_match)
1731 : : {
1732 : : /* Avoid warnings redeclaring built-ins which have not been
1733 : : explicitly declared. */
1734 : 2075422 : if (was_hidden)
1735 : : {
1736 : 797298 : tree t1, t2;
1737 : :
1738 : : /* A new declaration doesn't match a built-in one unless it
1739 : : is also extern "C". */
1740 : 797298 : gcc_assert (DECL_IS_UNDECLARED_BUILTIN (olddecl));
1741 : 797298 : gcc_assert (DECL_EXTERN_C_P (olddecl));
1742 : 797298 : if (!DECL_EXTERN_C_P (newdecl))
1743 : : return NULL_TREE;
1744 : :
1745 : 137191 : for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1746 : 137191 : t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1747 : 235440 : t1 || t2;
1748 : 98249 : t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1749 : : {
1750 : 235422 : if (!t1 || !t2)
1751 : : break;
1752 : : /* FILE, tm types are not known at the time
1753 : : we create the builtins. */
1754 : 731614 : for (unsigned i = 0;
1755 : 966874 : i < sizeof (builtin_structptr_types)
1756 : : / sizeof (builtin_structptr_type);
1757 : : ++i)
1758 : 868619 : if (TREE_VALUE (t2) == builtin_structptr_types[i].node)
1759 : : {
1760 : 137005 : tree t = TREE_VALUE (t1);
1761 : :
1762 : 137005 : if (TYPE_PTR_P (t)
1763 : 274010 : && TYPE_IDENTIFIER (TREE_TYPE (t))
1764 : 137005 : == get_identifier (builtin_structptr_types[i].str)
1765 : 273995 : && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1766 : : {
1767 : 136990 : tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1768 : :
1769 : 136990 : TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1770 : 136990 : = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1771 : 136990 : types_match = decls_match (newdecl, olddecl);
1772 : 136990 : if (types_match)
1773 : 136990 : return duplicate_decls (newdecl, olddecl,
1774 : 136990 : hiding, was_hidden);
1775 : 0 : TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1776 : : }
1777 : 15 : goto next_arg;
1778 : : }
1779 : :
1780 : 98255 : if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1781 : : break;
1782 : 98249 : next_arg:;
1783 : : }
1784 : :
1785 : 201 : warning_at (newdecl_loc,
1786 : : OPT_Wbuiltin_declaration_mismatch,
1787 : : "declaration of %q#D conflicts with built-in "
1788 : : "declaration %q#D", newdecl, olddecl);
1789 : : }
1790 : 1278124 : else if ((DECL_EXTERN_C_P (newdecl)
1791 : 15 : && DECL_EXTERN_C_P (olddecl))
1792 : 2556233 : || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1793 : 1278109 : TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1794 : : {
1795 : : /* Don't really override olddecl for __* prefixed builtins
1796 : : except for __[^b]*_chk, the compiler might be using those
1797 : : explicitly. */
1798 : 15 : if (fndecl_built_in_p (olddecl))
1799 : : {
1800 : 15 : tree id = DECL_NAME (olddecl);
1801 : 15 : const char *name = IDENTIFIER_POINTER (id);
1802 : 15 : size_t len;
1803 : :
1804 : 15 : if (name[0] == '_'
1805 : 15 : && name[1] == '_'
1806 : 30 : && (startswith (name + 2, "builtin_")
1807 : 6 : || (len = strlen (name)) <= strlen ("___chk")
1808 : 6 : || memcmp (name + len - strlen ("_chk"),
1809 : : "_chk", strlen ("_chk") + 1) != 0))
1810 : : {
1811 : 15 : if (DECL_INITIAL (newdecl))
1812 : : {
1813 : 6 : error_at (newdecl_loc,
1814 : : "definition of %q#D ambiguates built-in "
1815 : : "declaration %q#D", newdecl, olddecl);
1816 : 6 : return error_mark_node;
1817 : : }
1818 : 9 : auto_diagnostic_group d;
1819 : 9 : if (permerror (newdecl_loc,
1820 : : "new declaration %q#D ambiguates built-in"
1821 : : " declaration %q#D", newdecl, olddecl)
1822 : 9 : && flag_permissive)
1823 : 3 : inform (newdecl_loc,
1824 : : "ignoring the %q#D declaration", newdecl);
1825 : 9 : return flag_permissive ? olddecl : error_mark_node;
1826 : 9 : }
1827 : : }
1828 : :
1829 : : /* A near match; override the builtin. */
1830 : :
1831 : 0 : if (TREE_PUBLIC (newdecl))
1832 : 0 : warning_at (newdecl_loc,
1833 : : OPT_Wbuiltin_declaration_mismatch,
1834 : : "new declaration %q#D ambiguates built-in "
1835 : : "declaration %q#D", newdecl, olddecl);
1836 : : else
1837 : 0 : warning (OPT_Wshadow,
1838 : : fndecl_built_in_p (olddecl)
1839 : : ? G_("shadowing built-in function %q#D")
1840 : : : G_("shadowing library function %q#D"), olddecl);
1841 : : }
1842 : : else
1843 : : /* Discard the old built-in function. */
1844 : : return NULL_TREE;
1845 : :
1846 : : /* Replace the old RTL to avoid problems with inlining. */
1847 : 201 : COPY_DECL_RTL (newdecl, olddecl);
1848 : : }
1849 : : else
1850 : : {
1851 : : /* Even if the types match, prefer the new declarations type
1852 : : for built-ins which have not been explicitly declared,
1853 : : for exception lists, etc... */
1854 : 3627154 : tree type = TREE_TYPE (newdecl);
1855 : 3627154 : tree attribs = (*targetm.merge_type_attributes)
1856 : 3627154 : (TREE_TYPE (olddecl), type);
1857 : :
1858 : 3627154 : type = cp_build_type_attribute_variant (type, attribs);
1859 : 3627154 : TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1860 : : }
1861 : :
1862 : : /* If a function is explicitly declared "throw ()", propagate that to
1863 : : the corresponding builtin. */
1864 : 3627355 : if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1865 : 3478319 : && was_hidden
1866 : 3478276 : && TREE_NOTHROW (newdecl)
1867 : 6858007 : && !TREE_NOTHROW (olddecl))
1868 : : {
1869 : 27946 : enum built_in_function fncode = DECL_FUNCTION_CODE (olddecl);
1870 : 27946 : tree tmpdecl = builtin_decl_explicit (fncode);
1871 : 27946 : if (tmpdecl && tmpdecl != olddecl && types_match)
1872 : 27946 : TREE_NOTHROW (tmpdecl) = 1;
1873 : : }
1874 : :
1875 : : /* Whether or not the builtin can throw exceptions has no
1876 : : bearing on this declarator. */
1877 : 3627355 : TREE_NOTHROW (olddecl) = 0;
1878 : :
1879 : 3627355 : if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1880 : : {
1881 : : /* If a builtin function is redeclared as `static', merge
1882 : : the declarations, but make the original one static. */
1883 : 3 : DECL_THIS_STATIC (olddecl) = 1;
1884 : 3 : TREE_PUBLIC (olddecl) = 0;
1885 : :
1886 : : /* Make the old declaration consistent with the new one so
1887 : : that all remnants of the builtin-ness of this function
1888 : : will be banished. */
1889 : 3 : SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1890 : 3 : COPY_DECL_RTL (newdecl, olddecl);
1891 : : }
1892 : : }
1893 : 312846591 : else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1894 : : {
1895 : : /* C++ Standard, 3.3, clause 4:
1896 : : "[Note: a namespace name or a class template name must be unique
1897 : : in its declarative region (7.3.2, clause 14). ]" */
1898 : 77739982 : if (TREE_CODE (olddecl) == NAMESPACE_DECL
1899 : 77739961 : || TREE_CODE (newdecl) == NAMESPACE_DECL)
1900 : : /* Namespace conflicts with not namespace. */;
1901 : 45083343 : else if (DECL_TYPE_TEMPLATE_P (olddecl)
1902 : 122823292 : || DECL_TYPE_TEMPLATE_P (newdecl))
1903 : : /* Class template conflicts. */;
1904 : 77739943 : else if ((TREE_CODE (olddecl) == TEMPLATE_DECL
1905 : 45083343 : && DECL_TEMPLATE_RESULT (olddecl)
1906 : 45083343 : && TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == VAR_DECL)
1907 : 122823280 : || (TREE_CODE (newdecl) == TEMPLATE_DECL
1908 : 32615628 : && DECL_TEMPLATE_RESULT (newdecl)
1909 : 32615628 : && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == VAR_DECL))
1910 : : /* Variable template conflicts. */;
1911 : 77739934 : else if (concept_definition_p (olddecl)
1912 : 155479862 : || concept_definition_p (newdecl))
1913 : : /* Concept conflicts. */;
1914 : 77739922 : else if ((TREE_CODE (newdecl) == FUNCTION_DECL
1915 : 45121885 : && DECL_FUNCTION_TEMPLATE_P (olddecl))
1916 : 77778476 : || (TREE_CODE (olddecl) == FUNCTION_DECL
1917 : 32615635 : && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1918 : : {
1919 : : /* One is a function and the other is a template
1920 : : function. */
1921 : 77698935 : if (!UDLIT_OPER_P (DECL_NAME (newdecl)))
1922 : : return NULL_TREE;
1923 : :
1924 : : /* There can only be one! */
1925 : 57643 : auto_diagnostic_group d;
1926 : 57643 : if (TREE_CODE (newdecl) == TEMPLATE_DECL
1927 : 57643 : && check_raw_literal_operator (olddecl))
1928 : 3 : error_at (newdecl_loc,
1929 : : "literal operator %q#D conflicts with"
1930 : : " raw literal operator", newdecl);
1931 : 57640 : else if (check_raw_literal_operator (newdecl))
1932 : 3 : error_at (newdecl_loc,
1933 : : "raw literal operator %q#D conflicts with"
1934 : : " literal operator template", newdecl);
1935 : : else
1936 : : return NULL_TREE;
1937 : :
1938 : 6 : inform (olddecl_loc, "previous declaration %q#D", olddecl);
1939 : 6 : return error_mark_node;
1940 : 57643 : }
1941 : 40987 : else if (DECL_DECOMPOSITION_P (olddecl) || DECL_DECOMPOSITION_P (newdecl))
1942 : : /* A structured binding must be unique in its declarative region. */;
1943 : 38692 : else if (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1944 : 40984 : || DECL_IMPLICIT_TYPEDEF_P (newdecl))
1945 : : /* One is an implicit typedef, that's ok. */
1946 : : return NULL_TREE;
1947 : :
1948 : 147 : auto_diagnostic_group d;
1949 : 147 : error ("%q#D redeclared as different kind of entity", newdecl);
1950 : 147 : inform (olddecl_loc, "previous declaration %q#D", olddecl);
1951 : :
1952 : 147 : return error_mark_node;
1953 : 147 : }
1954 : 235106609 : else if (!types_match)
1955 : : {
1956 : 221404662 : if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1957 : : /* These are certainly not duplicate declarations; they're
1958 : : from different scopes. */
1959 : : return NULL_TREE;
1960 : :
1961 : 221404608 : if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1962 : : {
1963 : 189139764 : tree oldres = DECL_TEMPLATE_RESULT (olddecl);
1964 : 189139764 : tree newres = DECL_TEMPLATE_RESULT (newdecl);
1965 : :
1966 : : /* The name of a class template may not be declared to refer to
1967 : : any other template, class, function, object, namespace, value,
1968 : : or type in the same scope. */
1969 : 189139764 : if (TREE_CODE (oldres) == TYPE_DECL
1970 : 189139758 : || TREE_CODE (newres) == TYPE_DECL)
1971 : : {
1972 : 9 : auto_diagnostic_group d;
1973 : 9 : error_at (newdecl_loc,
1974 : : "conflicting declaration of template %q#D", newdecl);
1975 : 9 : inform (olddecl_loc,
1976 : : "previous declaration %q#D", olddecl);
1977 : 9 : return error_mark_node;
1978 : 9 : }
1979 : :
1980 : 189139755 : else if (TREE_CODE (oldres) == FUNCTION_DECL
1981 : 189139746 : && TREE_CODE (newres) == FUNCTION_DECL)
1982 : : {
1983 : 189139746 : if (duplicate_function_template_decls (newdecl, olddecl))
1984 : 0 : return error_mark_node;
1985 : : return NULL_TREE;
1986 : : }
1987 : : return NULL_TREE;
1988 : : }
1989 : 32264844 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
1990 : : {
1991 : 32264733 : if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1992 : : {
1993 : 57 : auto_diagnostic_group d;
1994 : 57 : error_at (newdecl_loc,
1995 : : "conflicting declaration of C function %q#D",
1996 : : newdecl);
1997 : 57 : inform (olddecl_loc,
1998 : : "previous declaration %q#D", olddecl);
1999 : 57 : return error_mark_node;
2000 : 57 : }
2001 : : /* For function versions, params and types match, but they
2002 : : are not ambiguous. */
2003 : 32264676 : else if ((!DECL_FUNCTION_VERSIONED (newdecl)
2004 : 32256828 : && !DECL_FUNCTION_VERSIONED (olddecl))
2005 : : /* Let constrained hidden friends coexist for now, we'll
2006 : : check satisfaction later. */
2007 : 32256828 : && !member_like_constrained_friend_p (newdecl)
2008 : 32142106 : && !member_like_constrained_friend_p (olddecl)
2009 : : // The functions have the same parameter types.
2010 : 32129461 : && compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
2011 : 32129461 : TYPE_ARG_TYPES (TREE_TYPE (olddecl)))
2012 : : // And the same constraints.
2013 : 32264739 : && equivalently_constrained (newdecl, olddecl))
2014 : : {
2015 : 63 : auto_diagnostic_group d;
2016 : 63 : error_at (newdecl_loc,
2017 : : "ambiguating new declaration of %q#D", newdecl);
2018 : 63 : inform (olddecl_loc,
2019 : : "old declaration %q#D", olddecl);
2020 : 63 : return error_mark_node;
2021 : 63 : }
2022 : : else
2023 : 32264613 : return NULL_TREE;
2024 : : }
2025 : : else
2026 : : {
2027 : 111 : auto_diagnostic_group d;
2028 : 111 : error_at (newdecl_loc, "conflicting declaration %q#D", newdecl);
2029 : 111 : inform (olddecl_loc,
2030 : : "previous declaration as %q#D", olddecl);
2031 : 111 : return error_mark_node;
2032 : 111 : }
2033 : : }
2034 : 13701947 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2035 : 13701947 : && DECL_OMP_DECLARE_REDUCTION_P (newdecl))
2036 : : {
2037 : : /* OMP UDRs are never duplicates. */
2038 : 27 : gcc_assert (DECL_OMP_DECLARE_REDUCTION_P (olddecl));
2039 : 27 : auto_diagnostic_group d;
2040 : 27 : error_at (newdecl_loc,
2041 : : "redeclaration of %<pragma omp declare reduction%>");
2042 : 27 : inform (olddecl_loc,
2043 : : "previous %<pragma omp declare reduction%> declaration");
2044 : 27 : return error_mark_node;
2045 : 27 : }
2046 : 13701920 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2047 : 13701920 : && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
2048 : 220 : && (!DECL_TEMPLATE_INFO (newdecl)
2049 : 220 : || (DECL_TI_TEMPLATE (newdecl)
2050 : 220 : != DECL_TI_TEMPLATE (olddecl))))
2051 : 9880572 : || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
2052 : 554537 : && (!DECL_TEMPLATE_INFO (olddecl)
2053 : 554537 : || (DECL_TI_TEMPLATE (olddecl)
2054 : 554537 : != DECL_TI_TEMPLATE (newdecl))))))
2055 : : /* It's OK to have a template specialization and a non-template
2056 : : with the same type, or to have specializations of two
2057 : : different templates with the same type. Note that if one is a
2058 : : specialization, and the other is an instantiation of the same
2059 : : template, that we do not exit at this point. That situation
2060 : : can occur if we instantiate a template class, and then
2061 : : specialize one of its methods. This situation is valid, but
2062 : : the declarations must be merged in the usual way. */
2063 : : return NULL_TREE;
2064 : 13701920 : else if (TREE_CODE (newdecl) == FUNCTION_DECL
2065 : 13701920 : && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
2066 : 554377 : && !DECL_USE_TEMPLATE (newdecl))
2067 : 9880572 : || (DECL_TEMPLATE_INSTANTIATION (newdecl)
2068 : 60 : && !DECL_USE_TEMPLATE (olddecl))))
2069 : : /* One of the declarations is a template instantiation, and the
2070 : : other is not a template at all. That's OK. */
2071 : : return NULL_TREE;
2072 : 13701920 : else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2073 : : {
2074 : : /* In [namespace.alias] we have:
2075 : :
2076 : : In a declarative region, a namespace-alias-definition can be
2077 : : used to redefine a namespace-alias declared in that declarative
2078 : : region to refer only to the namespace to which it already
2079 : : refers.
2080 : :
2081 : : Therefore, if we encounter a second alias directive for the same
2082 : : alias, we can just ignore the second directive. */
2083 : 21 : if (DECL_NAMESPACE_ALIAS (newdecl)
2084 : 21 : && (DECL_NAMESPACE_ALIAS (newdecl)
2085 : 18 : == DECL_NAMESPACE_ALIAS (olddecl)))
2086 : : return olddecl;
2087 : :
2088 : : /* Leave it to update_binding to merge or report error. */
2089 : : return NULL_TREE;
2090 : : }
2091 : : else
2092 : : {
2093 : 13701899 : const char *errmsg = redeclaration_error_message (newdecl, olddecl);
2094 : 13701899 : if (errmsg)
2095 : : {
2096 : 523 : auto_diagnostic_group d;
2097 : 523 : error_at (newdecl_loc, errmsg, newdecl);
2098 : 523 : if (DECL_NAME (olddecl) != NULL_TREE)
2099 : 523 : inform (olddecl_loc,
2100 : 523 : (DECL_INITIAL (olddecl) && namespace_bindings_p ())
2101 : : ? G_("%q#D previously defined here")
2102 : : : G_("%q#D previously declared here"), olddecl);
2103 : 523 : if (cxx_dialect >= cxx26
2104 : 138 : && DECL_NAME (newdecl)
2105 : 138 : && id_equal (DECL_NAME (newdecl), "_")
2106 : 536 : && !name_independent_decl_p (newdecl))
2107 : : {
2108 : 13 : if (TREE_CODE (newdecl) == PARM_DECL)
2109 : 2 : inform (newdecl_loc,
2110 : : "parameter declaration is not name-independent");
2111 : 11 : else if (DECL_DECOMPOSITION_P (newdecl))
2112 : : {
2113 : 3 : if (at_namespace_scope_p ())
2114 : 2 : inform (newdecl_loc,
2115 : : "structured binding at namespace scope is not "
2116 : : "name-independent");
2117 : 1 : else if (TREE_STATIC (newdecl))
2118 : 1 : inform (newdecl_loc,
2119 : : "static structured binding is not "
2120 : : "name-independent");
2121 : 0 : else if (DECL_EXTERNAL (newdecl))
2122 : 0 : inform (newdecl_loc,
2123 : : "extern structured binding is not "
2124 : : "name-independent");
2125 : : }
2126 : 8 : else if (at_class_scope_p ()
2127 : : && VAR_P (newdecl)
2128 : 8 : && TREE_STATIC (newdecl))
2129 : 0 : inform (newdecl_loc,
2130 : : "static data member is not name-independent");
2131 : 8 : else if (VAR_P (newdecl) && at_namespace_scope_p ())
2132 : 3 : inform (newdecl_loc,
2133 : : "variable at namespace scope is not name-independent");
2134 : 5 : else if (VAR_P (newdecl) && TREE_STATIC (newdecl))
2135 : 3 : inform (newdecl_loc,
2136 : : "static variable is not name-independent");
2137 : 2 : else if (VAR_P (newdecl) && DECL_EXTERNAL (newdecl))
2138 : 0 : inform (newdecl_loc,
2139 : : "extern variable is not name-independent");
2140 : : }
2141 : 523 : return error_mark_node;
2142 : 523 : }
2143 : 13701376 : else if (TREE_CODE (olddecl) == FUNCTION_DECL
2144 : 9880332 : && DECL_INITIAL (olddecl) != NULL_TREE
2145 : 11387 : && !prototype_p (TREE_TYPE (olddecl))
2146 : 13701376 : && prototype_p (TREE_TYPE (newdecl)))
2147 : : {
2148 : : /* Prototype decl follows defn w/o prototype. */
2149 : 0 : auto_diagnostic_group d;
2150 : 0 : if (warning_at (newdecl_loc, 0,
2151 : : "prototype specified for %q#D", newdecl))
2152 : 0 : inform (olddecl_loc,
2153 : : "previous non-prototype definition here");
2154 : 0 : }
2155 : 13329603 : else if (VAR_OR_FUNCTION_DECL_P (olddecl)
2156 : 23581708 : && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
2157 : : {
2158 : : /* [dcl.link]
2159 : : If two declarations of the same function or object
2160 : : specify different linkage-specifications ..., the program
2161 : : is ill-formed.... Except for functions with C++ linkage,
2162 : : a function declaration without a linkage specification
2163 : : shall not precede the first linkage specification for
2164 : : that function. A function can be declared without a
2165 : : linkage specification after an explicit linkage
2166 : : specification has been seen; the linkage explicitly
2167 : : specified in the earlier declaration is not affected by
2168 : : such a function declaration.
2169 : :
2170 : : DR 563 raises the question why the restrictions on
2171 : : functions should not also apply to objects. Older
2172 : : versions of G++ silently ignore the linkage-specification
2173 : : for this example:
2174 : :
2175 : : namespace N {
2176 : : extern int i;
2177 : : extern "C" int i;
2178 : : }
2179 : :
2180 : : which is clearly wrong. Therefore, we now treat objects
2181 : : like functions. */
2182 : 1765 : if (current_lang_depth () == 0)
2183 : : {
2184 : : /* There is no explicit linkage-specification, so we use
2185 : : the linkage from the previous declaration. */
2186 : 1759 : retrofit_lang_decl (newdecl);
2187 : 1759 : SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2188 : : }
2189 : : else
2190 : : {
2191 : 6 : auto_diagnostic_group d;
2192 : 6 : error_at (newdecl_loc,
2193 : : "conflicting declaration of %q#D with %qL linkage",
2194 : 6 : newdecl, DECL_LANGUAGE (newdecl));
2195 : 6 : inform (olddecl_loc,
2196 : : "previous declaration with %qL linkage",
2197 : 6 : DECL_LANGUAGE (olddecl));
2198 : 6 : }
2199 : : }
2200 : :
2201 : 13701376 : if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
2202 : : ;
2203 : 13126285 : else if (TREE_CODE (olddecl) == FUNCTION_DECL)
2204 : : {
2205 : : /* Note: free functions, as TEMPLATE_DECLs, are handled below. */
2206 : 10911473 : if (DECL_FUNCTION_MEMBER_P (olddecl)
2207 : 9325744 : && (/* grokfndecl passes member function templates too
2208 : : as FUNCTION_DECLs. */
2209 : 7893970 : DECL_TEMPLATE_INFO (olddecl)
2210 : : /* C++11 8.3.6/6.
2211 : : Default arguments for a member function of a class
2212 : : template shall be specified on the initial declaration
2213 : : of the member function within the class template. */
2214 : 634397 : || CLASSTYPE_TEMPLATE_INFO (CP_DECL_CONTEXT (olddecl))))
2215 : : {
2216 : 7337415 : check_redeclaration_no_default_args (newdecl);
2217 : :
2218 : 7337415 : if (DECL_TEMPLATE_INFO (olddecl)
2219 : 7337415 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (olddecl)))
2220 : : {
2221 : 2030421 : tree new_parms = DECL_TEMPLATE_INFO (newdecl)
2222 : 2030421 : ? DECL_INNERMOST_TEMPLATE_PARMS (DECL_TI_TEMPLATE (newdecl))
2223 : 2030421 : : INNERMOST_TEMPLATE_PARMS (current_template_parms);
2224 : 2030421 : tree old_parms
2225 : 2030421 : = DECL_INNERMOST_TEMPLATE_PARMS (DECL_TI_TEMPLATE (olddecl));
2226 : 2030421 : merge_default_template_args (new_parms, old_parms,
2227 : : /*class_p=*/false);
2228 : : }
2229 : : }
2230 : : else
2231 : : {
2232 : 1988329 : tree t1 = FUNCTION_FIRST_USER_PARMTYPE (olddecl);
2233 : 1988329 : tree t2 = FUNCTION_FIRST_USER_PARMTYPE (newdecl);
2234 : 1988329 : int i = 1;
2235 : :
2236 : 5367306 : for (; t1 && t1 != void_list_node;
2237 : 3378977 : t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
2238 : 3380694 : if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
2239 : : {
2240 : 39 : if (simple_cst_equal (TREE_PURPOSE (t1),
2241 : 39 : TREE_PURPOSE (t2)) == 1)
2242 : : {
2243 : 12 : auto_diagnostic_group d;
2244 : 12 : if (permerror (newdecl_loc,
2245 : : "default argument given for parameter "
2246 : : "%d of %q#D", i, newdecl))
2247 : 12 : inform (olddecl_loc,
2248 : : "previous specification in %q#D here",
2249 : : olddecl);
2250 : 12 : }
2251 : : else
2252 : : {
2253 : 27 : auto_diagnostic_group d;
2254 : 27 : error_at (newdecl_loc,
2255 : : "default argument given for parameter %d "
2256 : : "of %q#D", i, newdecl);
2257 : 27 : inform (olddecl_loc,
2258 : : "previous specification in %q#D here",
2259 : : olddecl);
2260 : 27 : }
2261 : : }
2262 : :
2263 : : /* C++17 11.3.6/4: "If a friend declaration specifies a default
2264 : : argument expression, that declaration... shall be the only
2265 : : declaration of the function or function template in the
2266 : : translation unit." */
2267 : 1988329 : check_no_redeclaration_friend_default_args (olddecl, newdecl);
2268 : : }
2269 : : }
2270 : : }
2271 : :
2272 : : /* Do not merge an implicit typedef with an explicit one. In:
2273 : :
2274 : : class A;
2275 : : ...
2276 : : typedef class A A __attribute__ ((foo));
2277 : :
2278 : : the attribute should apply only to the typedef. */
2279 : 17328731 : if (TREE_CODE (olddecl) == TYPE_DECL
2280 : 17328731 : && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
2281 : 22178 : || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
2282 : : return NULL_TREE;
2283 : :
2284 : 17299570 : if (DECL_TEMPLATE_PARM_P (olddecl) != DECL_TEMPLATE_PARM_P (newdecl))
2285 : : return NULL_TREE;
2286 : :
2287 : 17299558 : if (!validate_constexpr_redeclaration (olddecl, newdecl))
2288 : 30 : return error_mark_node;
2289 : :
2290 : 17299528 : if (modules_p ()
2291 : 76455 : && TREE_CODE (CP_DECL_CONTEXT (olddecl)) == NAMESPACE_DECL
2292 : 17342811 : && TREE_CODE (olddecl) != NAMESPACE_DECL)
2293 : : {
2294 : 43283 : if (!module_may_redeclare (olddecl, newdecl))
2295 : 24 : return error_mark_node;
2296 : :
2297 : 43259 : if (!hiding)
2298 : : {
2299 : : /* The old declaration should match the exportingness of the new
2300 : : declaration. But hidden friend declarations just keep the
2301 : : exportingness of the old declaration; see CWG2588. */
2302 : 39315 : tree not_tmpl = STRIP_TEMPLATE (olddecl);
2303 : 39315 : if (DECL_LANG_SPECIFIC (not_tmpl)
2304 : 39273 : && DECL_MODULE_ATTACH_P (not_tmpl)
2305 : : /* Typedefs are not entities and so are OK to be redeclared
2306 : : as exported: see [module.interface]/p6. */
2307 : 39525 : && TREE_CODE (olddecl) != TYPE_DECL)
2308 : : {
2309 : 198 : if (DECL_MODULE_EXPORT_P (newdecl)
2310 : 198 : && !DECL_MODULE_EXPORT_P (not_tmpl))
2311 : : {
2312 : 15 : auto_diagnostic_group d;
2313 : 15 : error ("conflicting exporting for declaration %qD", newdecl);
2314 : 15 : inform (olddecl_loc,
2315 : : "previously declared here without exporting");
2316 : 15 : }
2317 : : }
2318 : 39117 : else if (DECL_MODULE_EXPORT_P (newdecl))
2319 : 17391 : DECL_MODULE_EXPORT_P (not_tmpl) = true;
2320 : : }
2321 : : }
2322 : :
2323 : : /* We have committed to returning OLDDECL at this point. */
2324 : :
2325 : : /* If new decl is `static' and an `extern' was seen previously,
2326 : : warn about it. */
2327 : 17299504 : warn_extern_redeclared_static (newdecl, olddecl);
2328 : :
2329 : : /* True to merge attributes between the declarations, false to
2330 : : set OLDDECL's attributes to those of NEWDECL (for template
2331 : : explicit specializations that specify their own attributes
2332 : : independent of those specified for the primary template). */
2333 : 17299504 : const bool merge_attr = (TREE_CODE (newdecl) != FUNCTION_DECL
2334 : 13507642 : || !DECL_TEMPLATE_SPECIALIZATION (newdecl)
2335 : 17854026 : || DECL_TEMPLATE_SPECIALIZATION (olddecl));
2336 : :
2337 : 17299504 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2338 : : {
2339 : 13507642 : if (merge_attr)
2340 : : {
2341 : 12953325 : {
2342 : 12953325 : auto_diagnostic_group d;
2343 : 12953325 : if (diagnose_mismatched_attributes (olddecl, newdecl))
2344 : 36 : inform (olddecl_loc, DECL_INITIAL (olddecl)
2345 : : ? G_("previous definition of %qD here")
2346 : : : G_("previous declaration of %qD here"), olddecl);
2347 : 12953325 : }
2348 : :
2349 : : /* [dcl.attr.noreturn]: The first declaration of a function shall
2350 : : specify the noreturn attribute if any declaration of that function
2351 : : specifies the noreturn attribute. */
2352 : 12953325 : tree a;
2353 : 12953325 : if (TREE_THIS_VOLATILE (newdecl)
2354 : 104980 : && !TREE_THIS_VOLATILE (olddecl)
2355 : : /* This applies to [[noreturn]] only, not its GNU variants. */
2356 : 76 : && (a = lookup_attribute ("noreturn", DECL_ATTRIBUTES (newdecl)))
2357 : 54 : && cxx11_attribute_p (a)
2358 : 12953346 : && get_attribute_namespace (a) == NULL_TREE)
2359 : : {
2360 : 9 : auto_diagnostic_group d;
2361 : 9 : error_at (newdecl_loc, "function %qD declared %<[[noreturn]]%> "
2362 : : "but its first declaration was not", newdecl);
2363 : 9 : inform (olddecl_loc, "previous declaration of %qD", olddecl);
2364 : 9 : }
2365 : : }
2366 : :
2367 : : /* Now that functions must hold information normally held
2368 : : by field decls, there is extra work to do so that
2369 : : declaration information does not get destroyed during
2370 : : definition. */
2371 : 13507642 : if (DECL_VINDEX (olddecl))
2372 : 157701 : DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
2373 : 13507642 : if (DECL_CONTEXT (olddecl))
2374 : 13507642 : DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
2375 : 13507642 : DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
2376 : 13507642 : DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
2377 : 13507642 : DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
2378 : 13507642 : DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
2379 : 13507642 : DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
2380 : 13507642 : DECL_FINAL_P (newdecl) |= DECL_FINAL_P (olddecl);
2381 : 13507642 : DECL_OVERRIDE_P (newdecl) |= DECL_OVERRIDE_P (olddecl);
2382 : 13507642 : DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
2383 : 13507642 : DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P (newdecl)
2384 : 13507642 : |= DECL_HAS_DEPENDENT_EXPLICIT_SPEC_P (olddecl);
2385 : 13507642 : if (DECL_OVERLOADED_OPERATOR_P (olddecl))
2386 : 2408803 : DECL_OVERLOADED_OPERATOR_CODE_RAW (newdecl)
2387 : 4817606 : = DECL_OVERLOADED_OPERATOR_CODE_RAW (olddecl);
2388 : 13507642 : new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
2389 : :
2390 : 13507642 : duplicate_contracts (newdecl, olddecl);
2391 : :
2392 : : /* Optionally warn about more than one declaration for the same
2393 : : name, but don't warn about a function declaration followed by a
2394 : : definition. */
2395 : 27 : if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
2396 : 27 : && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
2397 : : /* Don't warn about extern decl followed by definition. */
2398 : 27 : && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
2399 : : /* Don't warn if at least one is/was hidden. */
2400 : 27 : && !(hiding || was_hidden)
2401 : : /* Don't warn about declaration followed by specialization. */
2402 : 13507654 : && (! DECL_TEMPLATE_SPECIALIZATION (newdecl)
2403 : 9 : || DECL_TEMPLATE_SPECIALIZATION (olddecl)))
2404 : : {
2405 : 6 : auto_diagnostic_group d;
2406 : 6 : if (warning_at (newdecl_loc,
2407 : : OPT_Wredundant_decls,
2408 : : "redundant redeclaration of %qD in same scope",
2409 : : newdecl))
2410 : 6 : inform (olddecl_loc,
2411 : : "previous declaration of %qD", olddecl);
2412 : 6 : }
2413 : :
2414 : : /* [dcl.fct.def.delete] A deleted definition of a function shall be the
2415 : : first declaration of the function or, for an explicit specialization
2416 : : of a function template, the first declaration of that
2417 : : specialization. */
2418 : 13507642 : if (!(DECL_TEMPLATE_INSTANTIATION (olddecl)
2419 : 554377 : && DECL_TEMPLATE_SPECIALIZATION (newdecl)))
2420 : : {
2421 : 12953325 : if (DECL_DELETED_FN (newdecl))
2422 : : {
2423 : 21 : auto_diagnostic_group d;
2424 : 21 : if (pedwarn (newdecl_loc, 0, "deleted definition of %qD "
2425 : : "is not first declaration", newdecl))
2426 : 21 : inform (olddecl_loc,
2427 : : "previous declaration of %qD", olddecl);
2428 : 21 : }
2429 : 12953325 : DECL_DELETED_FN (newdecl) |= DECL_DELETED_FN (olddecl);
2430 : 12953325 : if (DECL_DELETED_FN (olddecl)
2431 : 6 : && DECL_INITIAL (olddecl)
2432 : 12953331 : && TREE_CODE (DECL_INITIAL (olddecl)) == STRING_CST)
2433 : 3 : DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2434 : : }
2435 : : }
2436 : :
2437 : : /* Deal with C++: must preserve virtual function table size. */
2438 : 17299504 : if (TREE_CODE (olddecl) == TYPE_DECL)
2439 : : {
2440 : 22175 : tree newtype = TREE_TYPE (newdecl);
2441 : 22175 : tree oldtype = TREE_TYPE (olddecl);
2442 : :
2443 : 22175 : if (newtype != error_mark_node && oldtype != error_mark_node
2444 : 44350 : && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
2445 : 55380 : CLASSTYPE_FRIEND_CLASSES (newtype)
2446 : 18460 : = CLASSTYPE_FRIEND_CLASSES (oldtype);
2447 : :
2448 : 22175 : DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
2449 : : }
2450 : :
2451 : : /* Copy all the DECL_... slots specified in the new decl except for
2452 : : any that we copy here from the old type. */
2453 : 17299504 : if (merge_attr)
2454 : 16745187 : DECL_ATTRIBUTES (newdecl)
2455 : 33490374 : = (*targetm.merge_decl_attributes) (olddecl, newdecl);
2456 : : else
2457 : 554317 : DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2458 : :
2459 : 17299504 : if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2460 : : {
2461 : 3397914 : tree old_result = DECL_TEMPLATE_RESULT (olddecl);
2462 : 3397914 : tree new_result = DECL_TEMPLATE_RESULT (newdecl);
2463 : 3397914 : TREE_TYPE (olddecl) = TREE_TYPE (old_result);
2464 : :
2465 : : /* The new decl should not already have gathered any
2466 : : specializations. */
2467 : 3397914 : gcc_assert (!DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
2468 : :
2469 : : /* Make sure the contracts are equivalent. */
2470 : 3397914 : duplicate_contracts (newdecl, olddecl);
2471 : :
2472 : : /* Remove contracts from old_result so they aren't appended to
2473 : : old_result by the merge function. */
2474 : 3397914 : remove_contract_attributes (old_result);
2475 : :
2476 : 3397914 : DECL_ATTRIBUTES (old_result)
2477 : 3397914 : = (*targetm.merge_decl_attributes) (old_result, new_result);
2478 : :
2479 : 3397914 : if (DECL_FUNCTION_TEMPLATE_P (newdecl))
2480 : : {
2481 : 3397884 : if (DECL_SOURCE_LOCATION (newdecl)
2482 : 3397884 : != DECL_SOURCE_LOCATION (olddecl))
2483 : : {
2484 : : /* Per C++11 8.3.6/4, default arguments cannot be added in
2485 : : later declarations of a function template. */
2486 : 3375867 : check_redeclaration_no_default_args (newdecl);
2487 : : /* C++17 11.3.6/4: "If a friend declaration specifies a default
2488 : : argument expression, that declaration... shall be the only
2489 : : declaration of the function or function template in the
2490 : : translation unit." */
2491 : 3375867 : check_no_redeclaration_friend_default_args
2492 : 3375867 : (old_result, new_result);
2493 : :
2494 : 3375867 : tree new_parms = DECL_INNERMOST_TEMPLATE_PARMS (newdecl);
2495 : 3375867 : tree old_parms = DECL_INNERMOST_TEMPLATE_PARMS (olddecl);
2496 : 3375867 : merge_default_template_args (new_parms, old_parms,
2497 : : /*class_p=*/false);
2498 : : }
2499 : 3397884 : if (!DECL_UNIQUE_FRIEND_P (new_result))
2500 : 2804461 : DECL_UNIQUE_FRIEND_P (old_result) = false;
2501 : :
2502 : 3397884 : check_default_args (newdecl);
2503 : :
2504 : 6795756 : if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
2505 : 3397884 : && DECL_INITIAL (new_result))
2506 : : {
2507 : 24 : if (DECL_INITIAL (old_result))
2508 : 12 : DECL_UNINLINABLE (old_result) = 1;
2509 : : else
2510 : 12 : DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
2511 : 24 : DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
2512 : 72 : DECL_NOT_REALLY_EXTERN (old_result)
2513 : 24 : = DECL_NOT_REALLY_EXTERN (new_result);
2514 : 48 : DECL_INTERFACE_KNOWN (old_result)
2515 : 24 : = DECL_INTERFACE_KNOWN (new_result);
2516 : 24 : DECL_DECLARED_INLINE_P (old_result)
2517 : 24 : = DECL_DECLARED_INLINE_P (new_result);
2518 : 24 : DECL_DISREGARD_INLINE_LIMITS (old_result)
2519 : 24 : |= DECL_DISREGARD_INLINE_LIMITS (new_result);
2520 : : }
2521 : : else
2522 : : {
2523 : 3397860 : DECL_DECLARED_INLINE_P (old_result)
2524 : 3397860 : |= DECL_DECLARED_INLINE_P (new_result);
2525 : 3397860 : DECL_DISREGARD_INLINE_LIMITS (old_result)
2526 : 3397860 : |= DECL_DISREGARD_INLINE_LIMITS (new_result);
2527 : 3397860 : check_redeclaration_exception_specification (newdecl, olddecl);
2528 : :
2529 : 3397860 : merge_attribute_bits (new_result, old_result);
2530 : : }
2531 : : }
2532 : :
2533 : : /* Propagate purviewness and importingness as with
2534 : : set_instantiating_module. */
2535 : 3397914 : if (modules_p () && DECL_LANG_SPECIFIC (new_result))
2536 : : {
2537 : 22445 : if (DECL_MODULE_PURVIEW_P (new_result))
2538 : 12159 : DECL_MODULE_PURVIEW_P (old_result) = true;
2539 : 22445 : if (!DECL_MODULE_IMPORT_P (new_result))
2540 : 22445 : DECL_MODULE_IMPORT_P (old_result) = false;
2541 : : }
2542 : :
2543 : : /* If the new declaration is a definition, update the file and
2544 : : line information on the declaration, and also make
2545 : : the old declaration the same definition. */
2546 : 3397914 : if (DECL_INITIAL (new_result) != NULL_TREE)
2547 : : {
2548 : 5197858 : DECL_SOURCE_LOCATION (olddecl)
2549 : 5197858 : = DECL_SOURCE_LOCATION (old_result)
2550 : 2598929 : = DECL_SOURCE_LOCATION (newdecl);
2551 : 2598929 : DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
2552 : 2598929 : if (DECL_FUNCTION_TEMPLATE_P (newdecl))
2553 : : {
2554 : 2598929 : DECL_ARGUMENTS (old_result) = DECL_ARGUMENTS (new_result);
2555 : 9252131 : for (tree p = DECL_ARGUMENTS (old_result); p; p = DECL_CHAIN (p))
2556 : 6653202 : DECL_CONTEXT (p) = old_result;
2557 : :
2558 : 5197858 : if (tree fc = DECL_FRIEND_CONTEXT (new_result))
2559 : 14 : SET_DECL_FRIEND_CONTEXT (old_result, fc);
2560 : : }
2561 : : }
2562 : :
2563 : 3397914 : return olddecl;
2564 : : }
2565 : :
2566 : 13901590 : if (types_match)
2567 : : {
2568 : 13901389 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2569 : 13507441 : check_redeclaration_exception_specification (newdecl, olddecl);
2570 : :
2571 : : /* Automatically handles default parameters. */
2572 : 13901389 : tree oldtype = TREE_TYPE (olddecl);
2573 : 13901389 : tree newtype;
2574 : :
2575 : : /* For typedefs use the old type, as the new type's DECL_NAME points
2576 : : at newdecl, which will be ggc_freed. */
2577 : 13901389 : if (TREE_CODE (newdecl) == TYPE_DECL)
2578 : : {
2579 : : /* But NEWTYPE might have an attribute, honor that. */
2580 : 22175 : tree tem = TREE_TYPE (newdecl);
2581 : 22175 : newtype = oldtype;
2582 : :
2583 : 22175 : if (TYPE_USER_ALIGN (tem))
2584 : : {
2585 : 21 : if (TYPE_ALIGN (tem) > TYPE_ALIGN (newtype))
2586 : 6 : SET_TYPE_ALIGN (newtype, TYPE_ALIGN (tem));
2587 : 21 : TYPE_USER_ALIGN (newtype) = true;
2588 : : }
2589 : :
2590 : : /* And remove the new type from the variants list. */
2591 : 22175 : if (TYPE_NAME (TREE_TYPE (newdecl)) == newdecl)
2592 : : {
2593 : 30 : tree remove = TREE_TYPE (newdecl);
2594 : 30 : if (TYPE_MAIN_VARIANT (remove) == remove)
2595 : : {
2596 : 9 : gcc_assert (TYPE_NEXT_VARIANT (remove) == NULL_TREE);
2597 : : /* If remove is the main variant, no need to remove that
2598 : : from the list. One of the DECL_ORIGINAL_TYPE
2599 : : variants, e.g. created for aligned attribute, might still
2600 : : refer to the newdecl TYPE_DECL though, so remove that one
2601 : : in that case. */
2602 : 9 : if (tree orig = DECL_ORIGINAL_TYPE (newdecl))
2603 : 6 : if (orig != remove)
2604 : 6 : for (tree t = TYPE_MAIN_VARIANT (orig); t;
2605 : 0 : t = TYPE_MAIN_VARIANT (t))
2606 : 6 : if (TYPE_NAME (TYPE_NEXT_VARIANT (t)) == newdecl)
2607 : : {
2608 : 12 : TYPE_NEXT_VARIANT (t)
2609 : 6 : = TYPE_NEXT_VARIANT (TYPE_NEXT_VARIANT (t));
2610 : 6 : break;
2611 : : }
2612 : : }
2613 : : else
2614 : 21 : for (tree t = TYPE_MAIN_VARIANT (remove); ;
2615 : 0 : t = TYPE_NEXT_VARIANT (t))
2616 : 21 : if (TYPE_NEXT_VARIANT (t) == remove)
2617 : : {
2618 : 21 : TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (remove);
2619 : 21 : break;
2620 : : }
2621 : : }
2622 : : }
2623 : 13879214 : else if (merge_attr)
2624 : 13324897 : newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
2625 : : else
2626 : 554317 : newtype = TREE_TYPE (newdecl);
2627 : :
2628 : 13901389 : if (VAR_P (newdecl))
2629 : : {
2630 : 371773 : DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
2631 : : /* For already initialized vars, TREE_READONLY could have been
2632 : : cleared in cp_finish_decl, because the var needs runtime
2633 : : initialization or destruction. Make sure not to set
2634 : : TREE_READONLY on it again. */
2635 : 371773 : if (DECL_INITIALIZED_P (olddecl)
2636 : 1213 : && !DECL_EXTERNAL (olddecl)
2637 : 371858 : && !TREE_READONLY (olddecl))
2638 : 30 : TREE_READONLY (newdecl) = 0;
2639 : 371773 : DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
2640 : 743546 : DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
2641 : 371773 : |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
2642 : 371773 : if (DECL_DEPENDENT_INIT_P (olddecl))
2643 : 100045 : SET_DECL_DEPENDENT_INIT_P (newdecl, true);
2644 : 743546 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
2645 : 371773 : |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
2646 : 371773 : DECL_DECLARED_CONSTEXPR_P (newdecl)
2647 : 371773 : |= DECL_DECLARED_CONSTEXPR_P (olddecl);
2648 : 743546 : DECL_DECLARED_CONSTINIT_P (newdecl)
2649 : 371773 : |= DECL_DECLARED_CONSTINIT_P (olddecl);
2650 : :
2651 : : /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
2652 : 371773 : if (DECL_LANG_SPECIFIC (olddecl)
2653 : 739941 : && CP_DECL_THREADPRIVATE_P (olddecl))
2654 : : {
2655 : : /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
2656 : 41 : retrofit_lang_decl (newdecl);
2657 : 41 : CP_DECL_THREADPRIVATE_P (newdecl) = 1;
2658 : : }
2659 : : }
2660 : :
2661 : : /* An explicit specialization of a function template or of a member
2662 : : function of a class template can be declared transaction_safe
2663 : : independently of whether the corresponding template entity is declared
2664 : : transaction_safe. */
2665 : 1120 : if (flag_tm && TREE_CODE (newdecl) == FUNCTION_DECL
2666 : 1018 : && DECL_TEMPLATE_INSTANTIATION (olddecl)
2667 : 50 : && DECL_TEMPLATE_SPECIALIZATION (newdecl)
2668 : 50 : && tx_safe_fn_type_p (newtype)
2669 : 13901389 : && !tx_safe_fn_type_p (TREE_TYPE (newdecl)))
2670 : 0 : newtype = tx_unsafe_fn_variant (newtype);
2671 : :
2672 : 13901389 : TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
2673 : :
2674 : 13901389 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2675 : 13507441 : check_default_args (newdecl);
2676 : :
2677 : : /* Lay the type out, unless already done. */
2678 : 13901389 : if (! same_type_p (newtype, oldtype)
2679 : 366 : && TREE_TYPE (newdecl) != error_mark_node
2680 : 13901755 : && !(processing_template_decl && uses_template_parms (newdecl)))
2681 : 285 : layout_type (TREE_TYPE (newdecl));
2682 : :
2683 : 13901389 : if ((VAR_P (newdecl)
2684 : 13529616 : || TREE_CODE (newdecl) == PARM_DECL
2685 : 13529616 : || TREE_CODE (newdecl) == RESULT_DECL
2686 : 13529616 : || TREE_CODE (newdecl) == FIELD_DECL
2687 : 13529616 : || TREE_CODE (newdecl) == TYPE_DECL)
2688 : 13923564 : && !(processing_template_decl && uses_template_parms (newdecl)))
2689 : 239707 : layout_decl (newdecl, 0);
2690 : :
2691 : : /* Merge deprecatedness. */
2692 : 13901389 : if (TREE_DEPRECATED (newdecl))
2693 : 11386 : TREE_DEPRECATED (olddecl) = 1;
2694 : :
2695 : : /* Merge unavailability. */
2696 : 13901389 : if (TREE_UNAVAILABLE (newdecl))
2697 : 3 : TREE_UNAVAILABLE (olddecl) = 1;
2698 : :
2699 : : /* Preserve function specific target and optimization options */
2700 : 13901389 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2701 : : {
2702 : 13507441 : if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
2703 : 13507441 : && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
2704 : 0 : DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
2705 : 0 : = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
2706 : :
2707 : 13507441 : if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
2708 : 13507441 : && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
2709 : 31 : DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
2710 : 31 : = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
2711 : :
2712 : 13507441 : if (!DECL_UNIQUE_FRIEND_P (olddecl))
2713 : 13352836 : DECL_UNIQUE_FRIEND_P (newdecl) = false;
2714 : : }
2715 : : else
2716 : : {
2717 : : /* Merge the const type qualifier. */
2718 : 393948 : if (TREE_READONLY (newdecl))
2719 : 36422 : TREE_READONLY (olddecl) = 1;
2720 : : /* Merge the volatile type qualifier. */
2721 : 393948 : if (TREE_THIS_VOLATILE (newdecl))
2722 : 5 : TREE_THIS_VOLATILE (olddecl) = 1;
2723 : : }
2724 : :
2725 : : /* Merge the initialization information. */
2726 : 13901389 : if (DECL_INITIAL (newdecl) == NULL_TREE
2727 : 13901389 : && DECL_INITIAL (olddecl) != NULL_TREE)
2728 : : {
2729 : 167614 : DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2730 : 167614 : DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
2731 : 167614 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2732 : : {
2733 : 11306 : DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
2734 : 11306 : DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
2735 : : }
2736 : : }
2737 : :
2738 : 13901389 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2739 : : {
2740 : 13507441 : DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
2741 : 13507441 : |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
2742 : 13507441 : DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
2743 : 13507441 : if (DECL_IS_OPERATOR_NEW_P (olddecl))
2744 : 50398 : DECL_SET_IS_OPERATOR_NEW (newdecl, true);
2745 : 13507441 : DECL_LOOPING_CONST_OR_PURE_P (newdecl)
2746 : 13507441 : |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
2747 : 13507441 : DECL_IS_REPLACEABLE_OPERATOR (newdecl)
2748 : 13507441 : |= DECL_IS_REPLACEABLE_OPERATOR (olddecl);
2749 : :
2750 : 13507441 : if (merge_attr)
2751 : 12953124 : merge_attribute_bits (newdecl, olddecl);
2752 : : else
2753 : : {
2754 : : /* Merge the noreturn bit. */
2755 : 554317 : TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
2756 : 554317 : TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
2757 : 554317 : TREE_NOTHROW (olddecl) = TREE_NOTHROW (newdecl);
2758 : 554317 : DECL_IS_MALLOC (olddecl) = DECL_IS_MALLOC (newdecl);
2759 : 554317 : DECL_PURE_P (olddecl) = DECL_PURE_P (newdecl);
2760 : : }
2761 : : /* Keep the old RTL. */
2762 : 13507441 : COPY_DECL_RTL (olddecl, newdecl);
2763 : : }
2764 : 393948 : else if (VAR_P (newdecl)
2765 : 393948 : && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
2766 : : {
2767 : : /* Keep the old RTL. We cannot keep the old RTL if the old
2768 : : declaration was for an incomplete object and the new
2769 : : declaration is not since many attributes of the RTL will
2770 : : change. */
2771 : 371699 : COPY_DECL_RTL (olddecl, newdecl);
2772 : : }
2773 : : }
2774 : : /* If cannot merge, then use the new type and qualifiers,
2775 : : and don't preserve the old rtl. */
2776 : : else
2777 : : {
2778 : : /* Clean out any memory we had of the old declaration. */
2779 : 201 : tree oldstatic = value_member (olddecl, static_aggregates);
2780 : 201 : if (oldstatic)
2781 : 0 : TREE_VALUE (oldstatic) = error_mark_node;
2782 : :
2783 : 201 : TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
2784 : 201 : TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
2785 : 201 : TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
2786 : 201 : TREE_NOTHROW (olddecl) = TREE_NOTHROW (newdecl);
2787 : 201 : TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
2788 : : }
2789 : :
2790 : : /* Merge the storage class information. */
2791 : 13901590 : merge_weak (newdecl, olddecl);
2792 : :
2793 : 13901590 : DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
2794 : 13901590 : TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
2795 : 13901590 : TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
2796 : 13901590 : if (! DECL_EXTERNAL (olddecl))
2797 : 26777 : DECL_EXTERNAL (newdecl) = 0;
2798 : 13901590 : if (! DECL_COMDAT (olddecl))
2799 : 5596862 : DECL_COMDAT (newdecl) = 0;
2800 : :
2801 : 13901590 : if (VAR_OR_FUNCTION_DECL_P (newdecl) && DECL_LOCAL_DECL_P (newdecl))
2802 : : {
2803 : 75 : if (!DECL_LOCAL_DECL_P (olddecl))
2804 : : /* This can happen if olddecl was brought in from the
2805 : : enclosing namespace via a using-decl. The new decl is
2806 : : then not a block-scope extern at all. */
2807 : 3 : DECL_LOCAL_DECL_P (newdecl) = false;
2808 : : else
2809 : : {
2810 : 72 : retrofit_lang_decl (newdecl);
2811 : 72 : tree alias = DECL_LOCAL_DECL_ALIAS (newdecl)
2812 : 72 : = DECL_LOCAL_DECL_ALIAS (olddecl);
2813 : 72 : if (alias != error_mark_node)
2814 : : {
2815 : 69 : DECL_ATTRIBUTES (alias)
2816 : 69 : = (*targetm.merge_decl_attributes) (alias, newdecl);
2817 : 69 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2818 : 39 : merge_attribute_bits (newdecl, alias);
2819 : : }
2820 : : }
2821 : : }
2822 : :
2823 : 13901590 : new_template_info = NULL_TREE;
2824 : 13901590 : if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
2825 : : {
2826 : 13875880 : bool new_redefines_gnu_inline = false;
2827 : :
2828 : 13875880 : if (new_defines_function
2829 : 13875880 : && ((DECL_INTERFACE_KNOWN (olddecl)
2830 : 1228 : && TREE_CODE (olddecl) == FUNCTION_DECL)
2831 : 8614924 : || (TREE_CODE (olddecl) == TEMPLATE_DECL
2832 : 0 : && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
2833 : : == FUNCTION_DECL))))
2834 : 2456 : new_redefines_gnu_inline = GNU_INLINE_P (STRIP_TEMPLATE (olddecl));
2835 : :
2836 : : if (!new_redefines_gnu_inline)
2837 : : {
2838 : 13875805 : DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
2839 : 13875805 : DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
2840 : 13875805 : DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
2841 : : }
2842 : :
2843 : 13875880 : if (TREE_CODE (newdecl) != TYPE_DECL)
2844 : : {
2845 : 13875806 : DECL_TEMPLATE_INSTANTIATED (newdecl)
2846 : 13875806 : |= DECL_TEMPLATE_INSTANTIATED (olddecl);
2847 : 13875806 : DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
2848 : :
2849 : : /* If the OLDDECL is an instantiation and/or specialization,
2850 : : then the NEWDECL must be too. But, it may not yet be marked
2851 : : as such if the caller has created NEWDECL, but has not yet
2852 : : figured out that it is a redeclaration. */
2853 : 13875806 : if (!DECL_USE_TEMPLATE (newdecl))
2854 : 13321215 : DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
2855 : :
2856 : 13875806 : if (!DECL_TEMPLATE_SPECIALIZATION (newdecl))
2857 : 13321265 : DECL_INITIALIZED_IN_CLASS_P (newdecl)
2858 : 26642530 : |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
2859 : : }
2860 : :
2861 : : /* Don't really know how much of the language-specific
2862 : : values we should copy from old to new. */
2863 : 13875880 : DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
2864 : :
2865 : 13875880 : if (LANG_DECL_HAS_MIN (newdecl))
2866 : : {
2867 : 13875880 : DECL_ACCESS (newdecl) = DECL_ACCESS (olddecl);
2868 : 13875880 : if (DECL_TEMPLATE_INFO (newdecl))
2869 : : {
2870 : 565669 : new_template_info = DECL_TEMPLATE_INFO (newdecl);
2871 : 565669 : if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2872 : 565669 : && DECL_TEMPLATE_SPECIALIZATION (newdecl))
2873 : : /* Remember the presence of explicit specialization args. */
2874 : 1108640 : TINFO_USED_TEMPLATE_ID (DECL_TEMPLATE_INFO (olddecl))
2875 : 1108640 : = TINFO_USED_TEMPLATE_ID (new_template_info);
2876 : : }
2877 : :
2878 : : /* We don't want to copy template info from a non-templated friend
2879 : : (PR105761), but these shouldn't have DECL_TEMPLATE_INFO now. */
2880 : 13875880 : gcc_checking_assert (!DECL_TEMPLATE_INFO (olddecl)
2881 : : || !non_templated_friend_p (olddecl));
2882 : 13875880 : DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
2883 : : }
2884 : :
2885 : 13875880 : if (DECL_DECLARES_FUNCTION_P (newdecl))
2886 : : {
2887 : : /* Only functions have these fields. */
2888 : 13507642 : DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
2889 : 13507642 : DECL_BEFRIENDING_CLASSES (newdecl)
2890 : 13507642 : = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2891 : 13507642 : DECL_BEFRIENDING_CLASSES (olddecl));
2892 : : /* DECL_THUNKS is only valid for virtual functions,
2893 : : otherwise it is a DECL_FRIEND_CONTEXT. */
2894 : 13507642 : if (DECL_VIRTUAL_P (newdecl))
2895 : 636648 : SET_DECL_THUNKS (newdecl, DECL_THUNKS (olddecl));
2896 : 25741988 : else if (tree fc = DECL_FRIEND_CONTEXT (newdecl))
2897 : 91484 : SET_DECL_FRIEND_CONTEXT (olddecl, fc);
2898 : : }
2899 : 368238 : else if (VAR_P (newdecl))
2900 : : {
2901 : : /* Only variables have this field. */
2902 : 368164 : if (VAR_HAD_UNKNOWN_BOUND (olddecl))
2903 : 194 : SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2904 : : }
2905 : : }
2906 : :
2907 : 13901590 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
2908 : : {
2909 : 13507642 : tree parm;
2910 : :
2911 : : /* Merge parameter attributes. */
2912 : 13507642 : tree oldarg, newarg;
2913 : 13507642 : for (oldarg = DECL_ARGUMENTS(olddecl), newarg = DECL_ARGUMENTS(newdecl);
2914 : 38525374 : oldarg && newarg;
2915 : 25017732 : oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg))
2916 : : {
2917 : 25017732 : DECL_ATTRIBUTES (newarg)
2918 : 25017732 : = (*targetm.merge_decl_attributes) (oldarg, newarg);
2919 : 25017732 : DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2920 : : }
2921 : :
2922 : 13507642 : if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2923 : 13507642 : && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2924 : : {
2925 : : /* If newdecl is not a specialization, then it is not a
2926 : : template-related function at all. And that means that we
2927 : : should have exited above, returning 0. */
2928 : 554317 : gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2929 : :
2930 : 554317 : if (DECL_ODR_USED (olddecl))
2931 : : /* From [temp.expl.spec]:
2932 : :
2933 : : If a template, a member template or the member of a class
2934 : : template is explicitly specialized then that
2935 : : specialization shall be declared before the first use of
2936 : : that specialization that would cause an implicit
2937 : : instantiation to take place, in every translation unit in
2938 : : which such a use occurs. */
2939 : 0 : error ("explicit specialization of %qD after first use",
2940 : : olddecl);
2941 : :
2942 : 554317 : SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2943 : 554317 : DECL_COMDAT (newdecl) = (TREE_PUBLIC (newdecl)
2944 : 1108481 : && DECL_DECLARED_INLINE_P (newdecl));
2945 : :
2946 : : /* Don't propagate visibility from the template to the
2947 : : specialization here. We'll do that in determine_visibility if
2948 : : appropriate. */
2949 : 554317 : DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2950 : :
2951 : : /* [temp.expl.spec/14] We don't inline explicit specialization
2952 : : just because the primary template says so. */
2953 : 554317 : gcc_assert (!merge_attr);
2954 : :
2955 : 554317 : DECL_DECLARED_INLINE_P (olddecl)
2956 : 554317 : = DECL_DECLARED_INLINE_P (newdecl);
2957 : :
2958 : 554317 : DECL_DISREGARD_INLINE_LIMITS (olddecl)
2959 : 554317 : = DECL_DISREGARD_INLINE_LIMITS (newdecl);
2960 : :
2961 : 554317 : DECL_UNINLINABLE (olddecl) = DECL_UNINLINABLE (newdecl);
2962 : : }
2963 : 12953325 : else if (new_defines_function && DECL_INITIAL (olddecl))
2964 : : {
2965 : : /* Never inline re-defined extern inline functions.
2966 : : FIXME: this could be better handled by keeping both
2967 : : function as separate declarations. */
2968 : 75 : DECL_UNINLINABLE (newdecl) = 1;
2969 : : }
2970 : : else
2971 : : {
2972 : 12953250 : if (DECL_PENDING_INLINE_P (olddecl))
2973 : : {
2974 : 6 : DECL_PENDING_INLINE_P (newdecl) = 1;
2975 : 6 : DECL_PENDING_INLINE_INFO (newdecl)
2976 : 12 : = DECL_PENDING_INLINE_INFO (olddecl);
2977 : : }
2978 : 12953244 : else if (DECL_PENDING_INLINE_P (newdecl))
2979 : : ;
2980 : 12953244 : else if (DECL_SAVED_AUTO_RETURN_TYPE (newdecl) == NULL)
2981 : 12953244 : DECL_SAVED_AUTO_RETURN_TYPE (newdecl)
2982 : 25906488 : = DECL_SAVED_AUTO_RETURN_TYPE (olddecl);
2983 : :
2984 : 12953250 : DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2985 : :
2986 : 38859750 : DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2987 : 25906500 : = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2988 : :
2989 : 25906500 : DECL_DISREGARD_INLINE_LIMITS (newdecl)
2990 : 12953250 : = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2991 : 12953250 : = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2992 : 25525919 : || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2993 : : }
2994 : :
2995 : : /* Preserve abstractness on cloned [cd]tors. */
2996 : 13507642 : DECL_ABSTRACT_P (newdecl) = DECL_ABSTRACT_P (olddecl);
2997 : :
2998 : : /* Update newdecl's parms to point at olddecl. */
2999 : 43978971 : for (parm = DECL_ARGUMENTS (newdecl); parm;
3000 : 30471329 : parm = DECL_CHAIN (parm))
3001 : 30471329 : DECL_CONTEXT (parm) = olddecl;
3002 : :
3003 : 13507642 : if (! types_match)
3004 : : {
3005 : 201 : SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
3006 : 201 : COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
3007 : 201 : COPY_DECL_RTL (newdecl, olddecl);
3008 : : }
3009 : 13507642 : if (! types_match || new_defines_function)
3010 : : {
3011 : : /* These are the final DECL_ARGUMENTS that will be used within the
3012 : : body; update any references to old DECL_ARGUMENTS in the
3013 : : contracts, if present. */
3014 : 8616353 : if (tree contracts = DECL_CONTRACTS (newdecl))
3015 : 132 : remap_contracts (olddecl, newdecl, contracts, true);
3016 : :
3017 : : /* These need to be copied so that the names are available.
3018 : : Note that if the types do match, we'll preserve inline
3019 : : info and other bits, but if not, we won't. */
3020 : 8616353 : DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
3021 : 8616353 : DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
3022 : :
3023 : : /* In some cases, duplicate_contracts will remove contracts from
3024 : : OLDDECL, to avoid duplications. Sometimes, the contracts end up
3025 : : shared. If we removed them, re-add them. */
3026 : 8616353 : if (!DECL_CONTRACTS (olddecl))
3027 : 8616306 : copy_contract_attributes (olddecl, newdecl);
3028 : : }
3029 : : /* If redeclaring a builtin function, it stays built in
3030 : : if newdecl is a gnu_inline definition, or if newdecl is just
3031 : : a declaration. */
3032 : 13507642 : if (fndecl_built_in_p (olddecl)
3033 : 13563361 : && (new_defines_function ? GNU_INLINE_P (newdecl) : types_match))
3034 : : {
3035 : 3608521 : copy_decl_built_in_function (newdecl, olddecl);
3036 : : /* If we're keeping the built-in definition, keep the rtl,
3037 : : regardless of declaration matches. */
3038 : 3608521 : COPY_DECL_RTL (olddecl, newdecl);
3039 : 3608521 : if (DECL_BUILT_IN_CLASS (newdecl) == BUILT_IN_NORMAL)
3040 : : {
3041 : 3608515 : enum built_in_function fncode = DECL_FUNCTION_CODE (newdecl);
3042 : 3608515 : if (builtin_decl_explicit_p (fncode))
3043 : : {
3044 : : /* A compatible prototype of these builtin functions
3045 : : is seen, assume the runtime implements it with
3046 : : the expected semantics. */
3047 : 3608515 : switch (fncode)
3048 : : {
3049 : 10053 : case BUILT_IN_STPCPY:
3050 : 10053 : set_builtin_decl_implicit_p (fncode, true);
3051 : 10053 : break;
3052 : 3598462 : default:
3053 : 3598462 : set_builtin_decl_declared_p (fncode, true);
3054 : 3598462 : break;
3055 : : }
3056 : : }
3057 : :
3058 : 3608515 : copy_attributes_to_builtin (newdecl);
3059 : : }
3060 : : }
3061 : 13507642 : if (new_defines_function)
3062 : : /* If defining a function declared with other language
3063 : : linkage, use the previously declared language linkage. */
3064 : 8616152 : SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
3065 : 4891490 : else if (types_match)
3066 : : {
3067 : 4891289 : DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
3068 : : /* Don't clear out the arguments if we're just redeclaring a
3069 : : function. */
3070 : 4891289 : if (DECL_ARGUMENTS (olddecl))
3071 : : {
3072 : : /* If we removed contracts from previous definition, re-attach
3073 : : them. Otherwise, rewrite the contracts so they match the
3074 : : parameters of the new declaration. */
3075 : 1195680 : if (DECL_INITIAL (olddecl)
3076 : 11199 : && DECL_CONTRACTS (newdecl)
3077 : 1195691 : && !DECL_CONTRACTS (olddecl))
3078 : 10 : copy_contract_attributes (olddecl, newdecl);
3079 : : else
3080 : : {
3081 : : /* Temporarily undo the re-contexting of parameters so we can
3082 : : actually remap parameters. The inliner won't replace
3083 : : parameters if we don't do this. */
3084 : 1195670 : tree args = DECL_ARGUMENTS (newdecl);
3085 : 4476316 : for (tree p = args; p; p = DECL_CHAIN (p))
3086 : 3280646 : DECL_CONTEXT (p) = newdecl;
3087 : :
3088 : : /* Save new argument names for use in contracts parsing,
3089 : : unless we've already started parsing the body of olddecl
3090 : : (particular issues arise when newdecl is from a prior
3091 : : friend decl with no argument names, see
3092 : : modules/contracts-tpl-friend-1). */
3093 : 1195670 : if (tree contracts = DECL_CONTRACTS (olddecl))
3094 : 29 : remap_contracts (newdecl, olddecl, contracts, true);
3095 : :
3096 : : /* And reverse this operation again. */
3097 : 4476316 : for (tree p = args; p; p = DECL_CHAIN (p))
3098 : 3280646 : DECL_CONTEXT (p) = olddecl;
3099 : : }
3100 : :
3101 : 1195680 : DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
3102 : : }
3103 : : }
3104 : : }
3105 : 393948 : else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
3106 : 0 : NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
3107 : :
3108 : : /* Now preserve various other info from the definition. */
3109 : 13901590 : TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
3110 : 13901590 : TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
3111 : 13901590 : DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
3112 : 13901590 : COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
3113 : :
3114 : : /* Warn about conflicting visibility specifications. */
3115 : 13901590 : if (DECL_VISIBILITY_SPECIFIED (olddecl)
3116 : 4839883 : && DECL_VISIBILITY_SPECIFIED (newdecl)
3117 : 13902113 : && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
3118 : : {
3119 : 12 : auto_diagnostic_group d;
3120 : 12 : if (warning_at (newdecl_loc, OPT_Wattributes,
3121 : : "%qD: visibility attribute ignored because it "
3122 : : "conflicts with previous declaration", newdecl))
3123 : 12 : inform (olddecl_loc,
3124 : : "previous declaration of %qD", olddecl);
3125 : 12 : }
3126 : : /* Choose the declaration which specified visibility. */
3127 : 13901590 : if (DECL_VISIBILITY_SPECIFIED (olddecl))
3128 : : {
3129 : 4839883 : DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
3130 : 4839883 : DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
3131 : : }
3132 : : /* Init priority used to be merged from newdecl to olddecl by the memcpy,
3133 : : so keep this behavior. */
3134 : 13901590 : if (VAR_P (newdecl) && DECL_HAS_INIT_PRIORITY_P (newdecl))
3135 : : {
3136 : 4 : SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
3137 : 4 : DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
3138 : : }
3139 : : /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
3140 : 13901590 : if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl))
3141 : : {
3142 : 54 : SET_DECL_ALIGN (newdecl, DECL_ALIGN (olddecl));
3143 : 54 : DECL_USER_ALIGN (newdecl) |= DECL_USER_ALIGN (olddecl);
3144 : : }
3145 : 13901536 : else if (DECL_ALIGN (olddecl) == DECL_ALIGN (newdecl)
3146 : 13901536 : && DECL_USER_ALIGN (olddecl) != DECL_USER_ALIGN (newdecl))
3147 : 3 : DECL_USER_ALIGN (newdecl) = 1;
3148 : :
3149 : 13901590 : DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
3150 : 27803180 : if (DECL_WARN_IF_NOT_ALIGN (olddecl)
3151 : 13901590 : > DECL_WARN_IF_NOT_ALIGN (newdecl))
3152 : 0 : SET_DECL_WARN_IF_NOT_ALIGN (newdecl,
3153 : : DECL_WARN_IF_NOT_ALIGN (olddecl));
3154 : 13901590 : if (TREE_CODE (newdecl) == FIELD_DECL)
3155 : 0 : DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
3156 : :
3157 : : /* Merge module entity mapping information. */
3158 : 13901590 : if (DECL_LANG_SPECIFIC (olddecl)
3159 : 27777474 : && (DECL_MODULE_ENTITY_P (olddecl)
3160 : 13875662 : || DECL_MODULE_KEYED_DECLS_P (olddecl)))
3161 : : {
3162 : 222 : retrofit_lang_decl (newdecl);
3163 : 222 : DECL_MODULE_ENTITY_P (newdecl) = DECL_MODULE_ENTITY_P (olddecl);
3164 : 222 : DECL_MODULE_KEYED_DECLS_P (newdecl) = DECL_MODULE_KEYED_DECLS_P (olddecl);
3165 : : }
3166 : :
3167 : : /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
3168 : : with that from NEWDECL below. */
3169 : 13901590 : if (DECL_LANG_SPECIFIC (olddecl))
3170 : : {
3171 : 13875884 : gcc_checking_assert (DECL_LANG_SPECIFIC (olddecl)
3172 : : != DECL_LANG_SPECIFIC (newdecl));
3173 : 13875884 : ggc_free (DECL_LANG_SPECIFIC (olddecl));
3174 : : }
3175 : :
3176 : : /* Merge the USED information. */
3177 : 13901590 : if (TREE_USED (olddecl))
3178 : 466849 : TREE_USED (newdecl) = 1;
3179 : 13434741 : else if (TREE_USED (newdecl))
3180 : 54 : TREE_USED (olddecl) = 1;
3181 : :
3182 : 13901590 : if (VAR_P (newdecl))
3183 : : {
3184 : 371773 : if (DECL_READ_P (olddecl))
3185 : 33150 : DECL_READ_P (newdecl) = 1;
3186 : 338623 : else if (DECL_READ_P (newdecl))
3187 : 3 : DECL_READ_P (olddecl) = 1;
3188 : : }
3189 : :
3190 : 13901590 : if (DECL_PRESERVE_P (olddecl))
3191 : 48 : DECL_PRESERVE_P (newdecl) = 1;
3192 : 13901542 : else if (DECL_PRESERVE_P (newdecl))
3193 : 63 : DECL_PRESERVE_P (olddecl) = 1;
3194 : :
3195 : : /* Merge the DECL_FUNCTION_VERSIONED information. newdecl will be copied
3196 : : to olddecl and deleted. */
3197 : 13901590 : if (TREE_CODE (newdecl) == FUNCTION_DECL
3198 : 27409232 : && DECL_FUNCTION_VERSIONED (olddecl))
3199 : : {
3200 : : /* Set the flag for newdecl so that it gets copied to olddecl. */
3201 : 258 : DECL_FUNCTION_VERSIONED (newdecl) = 1;
3202 : : /* newdecl will be purged after copying to olddecl and is no longer
3203 : : a version. */
3204 : 258 : cgraph_node::delete_function_version_by_decl (newdecl);
3205 : : }
3206 : :
3207 : 13901590 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
3208 : : {
3209 : 13507642 : int function_size;
3210 : 13507642 : struct symtab_node *snode = symtab_node::get (olddecl);
3211 : :
3212 : 13507642 : function_size = sizeof (struct tree_decl_common);
3213 : :
3214 : 13507642 : memcpy ((char *) olddecl + sizeof (struct tree_common),
3215 : : (char *) newdecl + sizeof (struct tree_common),
3216 : : function_size - sizeof (struct tree_common));
3217 : :
3218 : 13507642 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3219 : : (char *) newdecl + sizeof (struct tree_decl_common),
3220 : : sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
3221 : :
3222 : : /* Preserve symtab node mapping. */
3223 : 13507642 : olddecl->decl_with_vis.symtab_node = snode;
3224 : :
3225 : 13507642 : if (new_template_info)
3226 : : /* If newdecl is a template instantiation, it is possible that
3227 : : the following sequence of events has occurred:
3228 : :
3229 : : o A friend function was declared in a class template. The
3230 : : class template was instantiated.
3231 : :
3232 : : o The instantiation of the friend declaration was
3233 : : recorded on the instantiation list, and is newdecl.
3234 : :
3235 : : o Later, however, instantiate_class_template called pushdecl
3236 : : on the newdecl to perform name injection. But, pushdecl in
3237 : : turn called duplicate_decls when it discovered that another
3238 : : declaration of a global function with the same name already
3239 : : existed.
3240 : :
3241 : : o Here, in duplicate_decls, we decided to clobber newdecl.
3242 : :
3243 : : If we're going to do that, we'd better make sure that
3244 : : olddecl, and not newdecl, is on the list of
3245 : : instantiations so that if we try to do the instantiation
3246 : : again we won't get the clobbered declaration. */
3247 : 565654 : reregister_specialization (newdecl,
3248 : : new_template_info,
3249 : : olddecl);
3250 : : }
3251 : : else
3252 : : {
3253 : 393948 : size_t size = tree_code_size (TREE_CODE (newdecl));
3254 : :
3255 : 393948 : memcpy ((char *) olddecl + sizeof (struct tree_common),
3256 : : (char *) newdecl + sizeof (struct tree_common),
3257 : : sizeof (struct tree_decl_common) - sizeof (struct tree_common));
3258 : :
3259 : 393948 : switch (TREE_CODE (newdecl))
3260 : : {
3261 : 393948 : case LABEL_DECL:
3262 : 393948 : case VAR_DECL:
3263 : 393948 : case RESULT_DECL:
3264 : 393948 : case PARM_DECL:
3265 : 393948 : case FIELD_DECL:
3266 : 393948 : case TYPE_DECL:
3267 : 393948 : case CONST_DECL:
3268 : 393948 : {
3269 : 393948 : struct symtab_node *snode = NULL;
3270 : :
3271 : 393948 : if (VAR_P (newdecl)
3272 : 393948 : && (TREE_STATIC (olddecl) || TREE_PUBLIC (olddecl)
3273 : 3 : || DECL_EXTERNAL (olddecl)))
3274 : 371773 : snode = symtab_node::get (olddecl);
3275 : 393948 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3276 : : (char *) newdecl + sizeof (struct tree_decl_common),
3277 : : size - sizeof (struct tree_decl_common)
3278 : 393948 : + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
3279 : 393948 : if (VAR_P (newdecl))
3280 : 371773 : olddecl->decl_with_vis.symtab_node = snode;
3281 : : }
3282 : : break;
3283 : 0 : default:
3284 : 0 : memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
3285 : : (char *) newdecl + sizeof (struct tree_decl_common),
3286 : : sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
3287 : 0 : + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
3288 : 0 : break;
3289 : : }
3290 : : }
3291 : :
3292 : 13901590 : if (VAR_OR_FUNCTION_DECL_P (newdecl))
3293 : : {
3294 : 13879415 : if (DECL_EXTERNAL (olddecl)
3295 : : || TREE_PUBLIC (olddecl)
3296 : 13879415 : || TREE_STATIC (olddecl))
3297 : : {
3298 : : /* Merge the section attribute.
3299 : : We want to issue an error if the sections conflict but that must be
3300 : : done later in decl_attributes since we are called before attributes
3301 : : are assigned. */
3302 : 13879415 : if (DECL_SECTION_NAME (newdecl) != NULL)
3303 : 7 : set_decl_section_name (olddecl, newdecl);
3304 : :
3305 : 13879415 : if (DECL_ONE_ONLY (newdecl))
3306 : : {
3307 : 0 : struct symtab_node *oldsym, *newsym;
3308 : 0 : if (TREE_CODE (olddecl) == FUNCTION_DECL)
3309 : 0 : oldsym = cgraph_node::get_create (olddecl);
3310 : : else
3311 : 0 : oldsym = varpool_node::get_create (olddecl);
3312 : 0 : newsym = symtab_node::get (newdecl);
3313 : 0 : oldsym->set_comdat_group (newsym->get_comdat_group ());
3314 : : }
3315 : : }
3316 : :
3317 : 13879415 : if (VAR_P (newdecl)
3318 : 13879415 : && CP_DECL_THREAD_LOCAL_P (newdecl))
3319 : : {
3320 : 383 : CP_DECL_THREAD_LOCAL_P (olddecl) = true;
3321 : 383 : if (!processing_template_decl)
3322 : 368 : set_decl_tls_model (olddecl, DECL_TLS_MODEL (newdecl));
3323 : : }
3324 : : }
3325 : :
3326 : 13901590 : DECL_UID (olddecl) = olddecl_uid;
3327 : :
3328 : : /* NEWDECL contains the merged attribute lists.
3329 : : Update OLDDECL to be the same. */
3330 : 13901590 : DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
3331 : :
3332 : : /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
3333 : : so that encode_section_info has a chance to look at the new decl
3334 : : flags and attributes. */
3335 : 13901590 : if (DECL_RTL_SET_P (olddecl)
3336 : 13901590 : && (TREE_CODE (olddecl) == FUNCTION_DECL
3337 : 0 : || (VAR_P (olddecl)
3338 : 0 : && TREE_STATIC (olddecl))))
3339 : 0 : make_decl_rtl (olddecl);
3340 : :
3341 : : /* The NEWDECL will no longer be needed. Because every out-of-class
3342 : : declaration of a member results in a call to duplicate_decls,
3343 : : freeing these nodes represents in a significant savings.
3344 : :
3345 : : Before releasing the node, be sore to remove function from symbol
3346 : : table that might have been inserted there to record comdat group.
3347 : : Be sure to however do not free DECL_STRUCT_FUNCTION because this
3348 : : structure is shared in between newdecl and oldecl. */
3349 : 13901590 : if (TREE_CODE (newdecl) == FUNCTION_DECL)
3350 : 13507642 : DECL_STRUCT_FUNCTION (newdecl) = NULL;
3351 : 13901590 : if (VAR_OR_FUNCTION_DECL_P (newdecl))
3352 : : {
3353 : 13879415 : struct symtab_node *snode = symtab_node::get (newdecl);
3354 : 13879415 : if (snode)
3355 : 390 : snode->remove ();
3356 : : }
3357 : :
3358 : 13901590 : if (TREE_CODE (olddecl) == FUNCTION_DECL)
3359 : : {
3360 : 13507642 : tree clone;
3361 : 14003095 : FOR_EACH_CLONE (clone, olddecl)
3362 : : {
3363 : 495453 : DECL_ATTRIBUTES (clone) = DECL_ATTRIBUTES (olddecl);
3364 : 495453 : DECL_PRESERVE_P (clone) |= DECL_PRESERVE_P (olddecl);
3365 : : }
3366 : : }
3367 : :
3368 : : /* Remove the associated constraints for newdecl, if any, before
3369 : : reclaiming memory. */
3370 : 13901590 : if (flag_concepts)
3371 : 3132326 : remove_constraints (newdecl);
3372 : :
3373 : : /* And similarly for any module tracking data. */
3374 : 13901590 : if (modules_p ())
3375 : 53986 : remove_defining_module (newdecl);
3376 : :
3377 : 13901590 : ggc_free (newdecl);
3378 : :
3379 : 13901590 : return olddecl;
3380 : : }
3381 : :
3382 : : /* Return zero if the declaration NEWDECL is valid
3383 : : when the declaration OLDDECL (assumed to be for the same name)
3384 : : has already been seen.
3385 : : Otherwise return an error message format string with a %s
3386 : : where the identifier should go. */
3387 : :
3388 : : static const char *
3389 : 13701899 : redeclaration_error_message (tree newdecl, tree olddecl)
3390 : : {
3391 : 13701935 : if (TREE_CODE (newdecl) == TYPE_DECL)
3392 : : {
3393 : : /* Because C++ can put things into name space for free,
3394 : : constructs like "typedef struct foo { ... } foo"
3395 : : would look like an erroneous redeclaration. */
3396 : 51372 : if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
3397 : : return NULL;
3398 : : else
3399 : : return G_("redefinition of %q#D");
3400 : : }
3401 : 13650563 : else if (TREE_CODE (newdecl) == FUNCTION_DECL)
3402 : : {
3403 : : /* If this is a pure function, its olddecl will actually be
3404 : : the original initialization to `0' (which we force to call
3405 : : abort()). Don't complain about redefinition in this case. */
3406 : 19761144 : if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
3407 : 9880590 : && DECL_INITIAL (olddecl) == NULL_TREE)
3408 : : return NULL;
3409 : :
3410 : : /* If both functions come from different namespaces, this is not
3411 : : a redeclaration - this is a conflict with a used function. */
3412 : 19761114 : if (DECL_NAMESPACE_SCOPE_P (olddecl)
3413 : 1521550 : && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
3414 : 9880560 : && ! decls_match (olddecl, newdecl))
3415 : : return G_("%qD conflicts with used function");
3416 : :
3417 : : /* We'll complain about linkage mismatches in
3418 : : warn_extern_redeclared_static. */
3419 : :
3420 : : /* Defining the same name twice is no good. */
3421 : 9880557 : if (decl_defined_p (olddecl)
3422 : 9880557 : && decl_defined_p (newdecl))
3423 : : {
3424 : 303 : if (DECL_NAME (olddecl) == NULL_TREE)
3425 : : return G_("%q#D not declared in class");
3426 : 441 : else if (!GNU_INLINE_P (olddecl)
3427 : 387 : || GNU_INLINE_P (newdecl))
3428 : 222 : return G_("redefinition of %q#D");
3429 : : }
3430 : :
3431 : 10520507 : if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
3432 : : {
3433 : 595821 : bool olda = GNU_INLINE_P (olddecl);
3434 : 595821 : bool newa = GNU_INLINE_P (newdecl);
3435 : :
3436 : 595821 : if (olda != newa)
3437 : : {
3438 : 15 : if (newa)
3439 : : return G_("%q+D redeclared inline with "
3440 : : "%<gnu_inline%> attribute");
3441 : : else
3442 : : return G_("%q+D redeclared inline without "
3443 : : "%<gnu_inline%> attribute");
3444 : : }
3445 : : }
3446 : :
3447 : : /* [class.compare.default]: A definition of a comparison operator as
3448 : : defaulted that appears in a class shall be the first declaration of
3449 : : that function. */
3450 : 9880320 : special_function_kind sfk = special_function_p (olddecl);
3451 : 9880320 : if (sfk == sfk_comparison && DECL_DEFAULTED_FN (newdecl))
3452 : : return G_("comparison operator %q+D defaulted after "
3453 : : "its first declaration");
3454 : :
3455 : 9880317 : check_abi_tag_redeclaration
3456 : 9880317 : (olddecl, lookup_attribute ("abi_tag", DECL_ATTRIBUTES (olddecl)),
3457 : 9880317 : lookup_attribute ("abi_tag", DECL_ATTRIBUTES (newdecl)));
3458 : :
3459 : 9880317 : return NULL;
3460 : : }
3461 : 3769991 : else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
3462 : : {
3463 : 3397953 : tree nt, ot;
3464 : :
3465 : 3397953 : if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == CONCEPT_DECL)
3466 : : return G_("redefinition of %q#D");
3467 : :
3468 : 3397947 : if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL)
3469 : 36 : return redeclaration_error_message (DECL_TEMPLATE_RESULT (newdecl),
3470 : 36 : DECL_TEMPLATE_RESULT (olddecl));
3471 : :
3472 : 3397911 : if (DECL_TEMPLATE_RESULT (newdecl) == DECL_TEMPLATE_RESULT (olddecl))
3473 : : return NULL;
3474 : :
3475 : 3397899 : nt = DECL_TEMPLATE_RESULT (newdecl);
3476 : 3397899 : if (DECL_TEMPLATE_INFO (nt))
3477 : 483345 : nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
3478 : 3397899 : ot = DECL_TEMPLATE_RESULT (olddecl);
3479 : 3397899 : if (DECL_TEMPLATE_INFO (ot))
3480 : 3397899 : ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
3481 : 5996867 : if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
3482 : 3397938 : && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
3483 : 15 : return G_("redefinition of %q#D");
3484 : :
3485 : 4589203 : if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
3486 : : {
3487 : 752278 : bool olda = GNU_INLINE_P (ot);
3488 : 752278 : bool newa = GNU_INLINE_P (nt);
3489 : :
3490 : 752278 : if (olda != newa)
3491 : : {
3492 : 0 : if (newa)
3493 : : return G_("%q+D redeclared inline with "
3494 : : "%<gnu_inline%> attribute");
3495 : : else
3496 : : return G_("%q+D redeclared inline without "
3497 : : "%<gnu_inline%> attribute");
3498 : : }
3499 : : }
3500 : :
3501 : : /* Core issue #226 (C++11):
3502 : :
3503 : : If a friend function template declaration specifies a
3504 : : default template-argument, that declaration shall be a
3505 : : definition and shall be the only declaration of the
3506 : : function template in the translation unit. */
3507 : 3397884 : if ((cxx_dialect != cxx98)
3508 : 3382502 : && TREE_CODE (ot) == FUNCTION_DECL && DECL_UNIQUE_FRIEND_P (ot)
3509 : 3604690 : && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
3510 : : /*is_primary=*/true,
3511 : : /*is_partial=*/false,
3512 : : /*is_friend_decl=*/2))
3513 : : return G_("redeclaration of friend %q#D "
3514 : : "may not have default template arguments");
3515 : :
3516 : 3397881 : return NULL;
3517 : : }
3518 : 372038 : else if (VAR_P (newdecl)
3519 : 371954 : && (CP_DECL_THREAD_LOCAL_P (newdecl)
3520 : 371954 : != CP_DECL_THREAD_LOCAL_P (olddecl))
3521 : 372085 : && (! DECL_LANG_SPECIFIC (olddecl)
3522 : 44 : || ! CP_DECL_THREADPRIVATE_P (olddecl)
3523 : 41 : || CP_DECL_THREAD_LOCAL_P (newdecl)))
3524 : : {
3525 : : /* Only variables can be thread-local, and all declarations must
3526 : : agree on this property. */
3527 : 6 : if (CP_DECL_THREAD_LOCAL_P (newdecl))
3528 : : return G_("thread-local declaration of %q#D follows "
3529 : : "non-thread-local declaration");
3530 : : else
3531 : 3 : return G_("non-thread-local declaration of %q#D follows "
3532 : : "thread-local declaration");
3533 : : }
3534 : 372032 : else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
3535 : : {
3536 : : /* The objects have been declared at namespace scope. If either
3537 : : is a member of an anonymous union, then this is an invalid
3538 : : redeclaration. For example:
3539 : :
3540 : : int i;
3541 : : union { int i; };
3542 : :
3543 : : is invalid. */
3544 : 371882 : if ((VAR_P (newdecl) && DECL_ANON_UNION_VAR_P (newdecl))
3545 : 743833 : || (VAR_P (olddecl) && DECL_ANON_UNION_VAR_P (olddecl)))
3546 : : return G_("redeclaration of %q#D");
3547 : : /* If at least one declaration is a reference, there is no
3548 : : conflict. For example:
3549 : :
3550 : : int i = 3;
3551 : : extern int i;
3552 : :
3553 : : is valid. */
3554 : 371948 : if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
3555 : : return NULL;
3556 : :
3557 : : /* Static data member declared outside a class definition
3558 : : if the variable is defined within the class with constexpr
3559 : : specifier is declaration rather than definition (and
3560 : : deprecated). */
3561 : 2806 : if (cxx_dialect >= cxx17
3562 : 2737 : && VAR_P (olddecl)
3563 : 2681 : && DECL_CLASS_SCOPE_P (olddecl)
3564 : 2649 : && DECL_DECLARED_CONSTEXPR_P (olddecl)
3565 : 5443 : && !DECL_INITIAL (newdecl))
3566 : : {
3567 : 2637 : DECL_EXTERNAL (newdecl) = 1;
3568 : : /* For now, only warn with explicit -Wdeprecated. */
3569 : 2637 : if (OPTION_SET_P (warn_deprecated))
3570 : : {
3571 : 40 : auto_diagnostic_group d;
3572 : 40 : if (warning_at (DECL_SOURCE_LOCATION (newdecl), OPT_Wdeprecated,
3573 : : "redundant redeclaration of %<constexpr%> "
3574 : : "static data member %qD", newdecl))
3575 : 4 : inform (DECL_SOURCE_LOCATION (olddecl),
3576 : : "previous declaration of %qD", olddecl);
3577 : 40 : }
3578 : 2637 : return NULL;
3579 : : }
3580 : :
3581 : : /* Reject two definitions. */
3582 : : return G_("redefinition of %q#D");
3583 : : }
3584 : : else
3585 : : {
3586 : : /* Objects declared with block scope: */
3587 : : /* Reject two definitions, and reject a definition
3588 : : together with an external reference. */
3589 : 69 : if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
3590 : : return G_("redeclaration of %q#D");
3591 : : return NULL;
3592 : : }
3593 : : }
3594 : :
3595 : :
3596 : : /* Hash and equality functions for the named_label table. */
3597 : :
3598 : : hashval_t
3599 : 68655 : named_label_hash::hash (const value_type entry)
3600 : : {
3601 : 68655 : return IDENTIFIER_HASH_VALUE (entry->name);
3602 : : }
3603 : :
3604 : : bool
3605 : 70281 : named_label_hash::equal (const value_type entry, compare_type name)
3606 : : {
3607 : 70281 : return name == entry->name;
3608 : : }
3609 : :
3610 : : /* Look for a label named ID in the current function. If one cannot
3611 : : be found, create one. Return the named_label_entry, or NULL on
3612 : : failure. */
3613 : :
3614 : : static named_label_entry *
3615 : 20828 : lookup_label_1 (tree id, bool making_local_p)
3616 : : {
3617 : 20828 : auto_cond_timevar tv (TV_NAME_LOOKUP);
3618 : :
3619 : : /* You can't use labels at global scope. */
3620 : 20828 : if (current_function_decl == NULL_TREE)
3621 : : {
3622 : 3 : error ("label %qE referenced outside of any function", id);
3623 : 3 : return NULL;
3624 : : }
3625 : :
3626 : 20825 : if (!named_labels)
3627 : 3916 : named_labels = hash_table<named_label_hash>::create_ggc (13);
3628 : :
3629 : 20825 : hashval_t hash = IDENTIFIER_HASH_VALUE (id);
3630 : 20825 : named_label_entry **slot
3631 : 20825 : = named_labels->find_slot_with_hash (id, hash, INSERT);
3632 : 20825 : named_label_entry *old = *slot;
3633 : :
3634 : 20825 : if (old && old->label_decl)
3635 : : {
3636 : 2155 : if (!making_local_p)
3637 : : return old;
3638 : :
3639 : 9 : if (old->binding_level == current_binding_level)
3640 : : {
3641 : 0 : auto_diagnostic_group d;
3642 : 0 : error ("local label %qE conflicts with existing label", id);
3643 : 0 : inform (DECL_SOURCE_LOCATION (old->label_decl), "previous label");
3644 : 0 : return NULL;
3645 : 0 : }
3646 : : }
3647 : :
3648 : : /* We are making a new decl, create or reuse the named_label_entry */
3649 : 18688 : named_label_entry *ent = NULL;
3650 : 21 : if (old && !old->label_decl)
3651 : : ent = old;
3652 : : else
3653 : : {
3654 : 18667 : ent = ggc_cleared_alloc<named_label_entry> ();
3655 : 18667 : ent->name = id;
3656 : 18667 : ent->outer = old;
3657 : 18667 : *slot = ent;
3658 : : }
3659 : :
3660 : : /* Now create the LABEL_DECL. */
3661 : 18679 : tree decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
3662 : :
3663 : 18679 : DECL_CONTEXT (decl) = current_function_decl;
3664 : 18679 : SET_DECL_MODE (decl, VOIDmode);
3665 : 18679 : if (making_local_p)
3666 : : {
3667 : 195 : C_DECLARED_LABEL_FLAG (decl) = true;
3668 : 195 : DECL_CHAIN (decl) = current_binding_level->names;
3669 : 195 : current_binding_level->names = decl;
3670 : : }
3671 : :
3672 : 18679 : ent->label_decl = decl;
3673 : :
3674 : 18679 : return ent;
3675 : 20828 : }
3676 : :
3677 : : /* Wrapper for lookup_label_1. */
3678 : :
3679 : : tree
3680 : 1737 : lookup_label (tree id)
3681 : : {
3682 : 1737 : named_label_entry *ent = lookup_label_1 (id, false);
3683 : 1737 : return ent ? ent->label_decl : NULL_TREE;
3684 : : }
3685 : :
3686 : : /* Remember that we've seen &&ID. */
3687 : :
3688 : : void
3689 : 220 : mark_label_addressed (tree id)
3690 : : {
3691 : 220 : named_label_entry *ent = lookup_label_1 (id, false);
3692 : 220 : ent->addressed = true;
3693 : 220 : }
3694 : :
3695 : : tree
3696 : 195 : declare_local_label (tree id)
3697 : : {
3698 : 195 : named_label_entry *ent = lookup_label_1 (id, true);
3699 : 195 : return ent ? ent->label_decl : NULL_TREE;
3700 : : }
3701 : :
3702 : : /* Returns true if it is ill-formed to jump past the declaration of DECL. */
3703 : :
3704 : : static bool
3705 : 13182 : decl_jump_unsafe (tree decl)
3706 : : {
3707 : : /* [stmt.dcl]/3: A program that jumps from a point where a local variable
3708 : : with automatic storage duration is not in scope to a point where it is
3709 : : in scope is ill-formed unless the variable has scalar type, class type
3710 : : with a trivial default constructor and a trivial destructor, a
3711 : : cv-qualified version of one of these types, or an array of one of the
3712 : : preceding types and is declared without an initializer (8.5). */
3713 : 13182 : tree type = TREE_TYPE (decl);
3714 : :
3715 : 13182 : return (type != error_mark_node
3716 : : && VAR_P (decl)
3717 : 13164 : && !TREE_STATIC (decl)
3718 : 25117 : && (DECL_NONTRIVIALLY_INITIALIZED_P (decl)
3719 : 10736 : || variably_modified_type_p (type, NULL_TREE)));
3720 : : }
3721 : :
3722 : : /* A subroutine of check_previous_goto_1 and check_goto to identify a branch
3723 : : to the user. */
3724 : :
3725 : : static bool
3726 : 268 : identify_goto (tree decl, location_t loc, const location_t *locus,
3727 : : diagnostic_t diag_kind, bool computed)
3728 : : {
3729 : 268 : if (computed)
3730 : 25 : diag_kind = DK_WARNING;
3731 : 268 : bool complained
3732 : 355 : = emit_diagnostic (diag_kind, loc, 0,
3733 : : decl ? G_("jump to label %qD")
3734 : : : G_("jump to case label"), decl);
3735 : 268 : if (complained && locus)
3736 : : {
3737 : 181 : if (computed)
3738 : 25 : inform (*locus, " as a possible target of computed goto");
3739 : : else
3740 : 156 : inform (*locus, " from here");
3741 : : }
3742 : 268 : return complained;
3743 : : }
3744 : :
3745 : : /* Check that a single previously seen jump to a newly defined label
3746 : : is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
3747 : : the jump context; NAMES are the names in scope in LEVEL at the jump
3748 : : context; LOCUS is the source position of the jump or 0. COMPUTED
3749 : : is a vec of decls if the jump is a computed goto. Returns
3750 : : true if all is well. */
3751 : :
3752 : : static bool
3753 : 1696601 : check_previous_goto_1 (tree decl, cp_binding_level* level, tree names,
3754 : : bool exited_omp, const location_t *locus,
3755 : : vec<tree,va_gc> *computed)
3756 : : {
3757 : 1696601 : auto_diagnostic_group d;
3758 : 1696601 : cp_binding_level *b;
3759 : 1696601 : bool complained = false;
3760 : 1696601 : int identified = 0;
3761 : 1696601 : bool saw_eh = false, saw_omp = false, saw_tm = false, saw_cxif = false;
3762 : 1696601 : bool saw_ceif = false, saw_se = false;
3763 : :
3764 : 1696601 : if (exited_omp)
3765 : : {
3766 : 12 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3767 : : computed);
3768 : 12 : if (complained)
3769 : 12 : inform (input_location, " exits OpenMP structured block");
3770 : : saw_omp = true;
3771 : : identified = 2;
3772 : : }
3773 : :
3774 : 5065417 : for (b = current_binding_level; b ; b = b->level_chain)
3775 : : {
3776 : 3368816 : tree new_decls, old_decls = (b == level ? names : NULL_TREE);
3777 : :
3778 : 3378798 : for (new_decls = b->names; new_decls != old_decls;
3779 : 10383 : new_decls = (DECL_P (new_decls) ? DECL_CHAIN (new_decls)
3780 : 401 : : TREE_CHAIN (new_decls)))
3781 : : {
3782 : 9982 : bool problem = decl_jump_unsafe (new_decls);
3783 : 9982 : if (! problem)
3784 : 9937 : continue;
3785 : :
3786 : 45 : if (!identified)
3787 : : {
3788 : 45 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3789 : : computed);
3790 : 45 : identified = 2;
3791 : : }
3792 : 45 : if (complained)
3793 : 45 : inform (DECL_SOURCE_LOCATION (new_decls),
3794 : : " crosses initialization of %q#D", new_decls);
3795 : : }
3796 : :
3797 : 3368816 : if (b == level)
3798 : : break;
3799 : :
3800 : 1672215 : const char *inf = NULL;
3801 : 1672215 : location_t loc = input_location;
3802 : 1672215 : switch (b->kind)
3803 : : {
3804 : 3 : case sk_try:
3805 : 3 : if (!saw_eh)
3806 : : inf = G_(" enters %<try%> block");
3807 : : saw_eh = true;
3808 : : break;
3809 : :
3810 : 9 : case sk_catch:
3811 : 9 : if (!saw_eh)
3812 : : inf = G_(" enters %<catch%> block");
3813 : : saw_eh = true;
3814 : : break;
3815 : :
3816 : 102 : case sk_omp:
3817 : 102 : if (!saw_omp)
3818 : : inf = G_(" enters OpenMP structured block");
3819 : : saw_omp = true;
3820 : : break;
3821 : :
3822 : 3 : case sk_transaction:
3823 : 3 : if (!saw_tm)
3824 : : inf = G_(" enters synchronized or atomic statement");
3825 : : saw_tm = true;
3826 : : break;
3827 : :
3828 : 12 : case sk_stmt_expr:
3829 : 12 : if (!saw_se)
3830 : : inf = G_(" enters statement expression");
3831 : : saw_se = true;
3832 : : break;
3833 : :
3834 : 1671982 : case sk_block:
3835 : 1671982 : if (!saw_cxif && level_for_constexpr_if (b->level_chain))
3836 : : {
3837 : 9 : inf = G_(" enters %<constexpr if%> statement");
3838 : 9 : loc = EXPR_LOCATION (b->level_chain->this_entity);
3839 : : saw_cxif = true;
3840 : : }
3841 : 1671973 : else if (!saw_ceif && level_for_consteval_if (b->level_chain))
3842 : : {
3843 : 18 : inf = G_(" enters %<consteval if%> statement");
3844 : 18 : loc = EXPR_LOCATION (b->level_chain->this_entity);
3845 : : saw_ceif = true;
3846 : : }
3847 : : break;
3848 : :
3849 : : default:
3850 : : break;
3851 : : }
3852 : :
3853 : : if (inf)
3854 : : {
3855 : 135 : if (identified < 2)
3856 : 135 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3857 : : computed);
3858 : 135 : identified = 2;
3859 : 135 : if (complained)
3860 : 135 : inform (loc, inf);
3861 : : }
3862 : : }
3863 : :
3864 : 1696601 : if (!vec_safe_is_empty (computed))
3865 : : {
3866 : 9 : if (!identified)
3867 : 6 : complained = identify_goto (decl, input_location, locus, DK_ERROR,
3868 : : computed);
3869 : 9 : identified = 2;
3870 : 9 : if (complained)
3871 : 18 : for (tree d : computed)
3872 : : {
3873 : 9 : if (DECL_P (d))
3874 : 6 : inform (DECL_SOURCE_LOCATION (d), " does not destroy %qD", d);
3875 : 3 : else if (d == get_identifier ("catch"))
3876 : 3 : inform (*locus, " does not clean up handled exception");
3877 : : }
3878 : : }
3879 : :
3880 : 3393202 : return !identified;
3881 : 1696601 : }
3882 : :
3883 : : static void
3884 : 1082 : check_previous_goto (tree decl, struct named_label_use_entry *use)
3885 : : {
3886 : 1082 : check_previous_goto_1 (decl, use->binding_level,
3887 : 1082 : use->names_in_scope, use->in_omp_scope,
3888 : 1082 : &use->o_goto_locus, use->computed_goto);
3889 : 1082 : }
3890 : :
3891 : : static bool
3892 : 1695519 : check_switch_goto (cp_binding_level* level)
3893 : : {
3894 : 1695519 : return check_previous_goto_1 (NULL_TREE, level, level->names,
3895 : 1695519 : false, NULL, nullptr);
3896 : : }
3897 : :
3898 : : /* Check that a new jump to a label ENT is OK. COMPUTED is true
3899 : : if this is a possible target of a computed goto. */
3900 : :
3901 : : void
3902 : 1627 : check_goto_1 (named_label_entry *ent, bool computed)
3903 : : {
3904 : 1627 : auto_diagnostic_group d;
3905 : 1627 : tree decl = ent->label_decl;
3906 : :
3907 : : /* If the label hasn't been defined yet, defer checking. */
3908 : 1627 : if (! DECL_INITIAL (decl))
3909 : : {
3910 : : /* Don't bother creating another use if the last goto had the
3911 : : same data, and will therefore create the same set of errors. */
3912 : 1235 : if (ent->uses
3913 : 240 : && ent->uses->names_in_scope == current_binding_level->names)
3914 : : return;
3915 : :
3916 : 1091 : named_label_use_entry *new_use
3917 : 1091 : = ggc_alloc<named_label_use_entry> ();
3918 : 1091 : new_use->binding_level = current_binding_level;
3919 : 1091 : new_use->names_in_scope = current_binding_level->names;
3920 : 1091 : new_use->o_goto_locus = input_location;
3921 : 1091 : new_use->in_omp_scope = false;
3922 : 1091 : new_use->computed_goto = computed ? make_tree_vector () : nullptr;
3923 : :
3924 : 1091 : new_use->next = ent->uses;
3925 : 1091 : ent->uses = new_use;
3926 : 1091 : return;
3927 : : }
3928 : :
3929 : 392 : bool saw_catch = false, complained = false;
3930 : 392 : int identified = 0;
3931 : 392 : tree bad;
3932 : 392 : unsigned ix;
3933 : :
3934 : 383 : if (ent->in_try_scope || ent->in_catch_scope || ent->in_transaction_scope
3935 : 377 : || ent->in_constexpr_if || ent->in_consteval_if
3936 : 371 : || ent->in_omp_scope || ent->in_stmt_expr
3937 : 757 : || !vec_safe_is_empty (ent->bad_decls))
3938 : : {
3939 : 33 : diagnostic_t diag_kind = DK_PERMERROR;
3940 : 33 : if (ent->in_try_scope || ent->in_catch_scope || ent->in_constexpr_if
3941 : 18 : || ent->in_consteval_if || ent->in_transaction_scope
3942 : 12 : || ent->in_omp_scope || ent->in_stmt_expr)
3943 : 27 : diag_kind = DK_ERROR;
3944 : 33 : complained = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
3945 : : &input_location, diag_kind, computed);
3946 : 33 : identified = 1 + (diag_kind == DK_ERROR);
3947 : : }
3948 : :
3949 : 398 : FOR_EACH_VEC_SAFE_ELT (ent->bad_decls, ix, bad)
3950 : : {
3951 : 6 : bool problem = decl_jump_unsafe (bad);
3952 : :
3953 : 6 : if (problem && DECL_ARTIFICIAL (bad))
3954 : : {
3955 : : /* Can't skip init of __exception_info. */
3956 : 0 : if (identified == 1)
3957 : : {
3958 : 0 : complained = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
3959 : : &input_location, DK_ERROR, computed);
3960 : 0 : identified = 2;
3961 : : }
3962 : 0 : if (complained)
3963 : 0 : inform (DECL_SOURCE_LOCATION (bad), " enters %<catch%> block");
3964 : : saw_catch = true;
3965 : : }
3966 : 6 : else if (complained)
3967 : 6 : inform (DECL_SOURCE_LOCATION (bad),
3968 : : " skips initialization of %q#D", bad);
3969 : : }
3970 : :
3971 : 392 : if (complained)
3972 : : {
3973 : 33 : if (ent->in_try_scope)
3974 : 9 : inform (input_location, " enters %<try%> block");
3975 : 24 : else if (ent->in_catch_scope && !saw_catch)
3976 : 3 : inform (input_location, " enters %<catch%> block");
3977 : 21 : else if (ent->in_transaction_scope)
3978 : 3 : inform (input_location, " enters synchronized or atomic statement");
3979 : 18 : else if (ent->in_constexpr_if)
3980 : 3 : inform (input_location, " enters %<constexpr if%> statement");
3981 : 15 : else if (ent->in_consteval_if)
3982 : 3 : inform (input_location, " enters %<consteval if%> statement");
3983 : 12 : else if (ent->in_stmt_expr)
3984 : 3 : inform (input_location, " enters statement expression");
3985 : : }
3986 : :
3987 : 392 : if (ent->in_omp_scope)
3988 : : {
3989 : 3 : if (complained)
3990 : 3 : inform (input_location, " enters OpenMP structured block");
3991 : : }
3992 : 389 : else if (flag_openmp)
3993 : 69 : for (cp_binding_level *b = current_binding_level; b ; b = b->level_chain)
3994 : : {
3995 : 42 : if (b == ent->binding_level)
3996 : : break;
3997 : 36 : if (b->kind == sk_omp)
3998 : : {
3999 : 21 : if (identified < 2)
4000 : : {
4001 : 42 : complained = identify_goto (decl,
4002 : 21 : DECL_SOURCE_LOCATION (decl),
4003 : : &input_location, DK_ERROR,
4004 : : computed);
4005 : 21 : identified = 2;
4006 : : }
4007 : 21 : if (complained)
4008 : 21 : inform (input_location, " exits OpenMP structured block");
4009 : : break;
4010 : : }
4011 : : }
4012 : :
4013 : : /* Warn if a computed goto might involve a local variable going out of scope
4014 : : without being cleaned up. */
4015 : 392 : if (computed)
4016 : : {
4017 : 59 : auto level = ent->binding_level;
4018 : 59 : auto names = ent->names_in_scope;
4019 : 59 : for (auto b = current_binding_level; ; b = b->level_chain)
4020 : : {
4021 : 99 : if (b->kind == sk_catch)
4022 : : {
4023 : 6 : if (!identified)
4024 : : {
4025 : 6 : complained
4026 : 6 : = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
4027 : : &input_location, DK_ERROR, computed);
4028 : 6 : identified = 2;
4029 : : }
4030 : 6 : if (complained)
4031 : 6 : inform (input_location,
4032 : : " does not clean up handled exception");
4033 : : }
4034 : 99 : tree end = b == level ? names : NULL_TREE;
4035 : 115 : for (tree d = b->names; d != end; d = DECL_CHAIN (d))
4036 : : {
4037 : 16 : if (automatic_var_with_nontrivial_dtor_p (d))
4038 : : {
4039 : 10 : if (!identified)
4040 : : {
4041 : 10 : complained
4042 : 10 : = identify_goto (decl, DECL_SOURCE_LOCATION (decl),
4043 : : &input_location, DK_ERROR, computed);
4044 : 10 : identified = 2;
4045 : : }
4046 : 10 : if (complained)
4047 : 10 : inform (DECL_SOURCE_LOCATION (d),
4048 : : " does not destroy %qD", d);
4049 : : }
4050 : : }
4051 : 99 : if (b == level)
4052 : : break;
4053 : 40 : }
4054 : : }
4055 : 1627 : }
4056 : :
4057 : : /* Check that a new jump to a label DECL is OK. Called by
4058 : : finish_goto_stmt. */
4059 : :
4060 : : void
4061 : 1593 : check_goto (tree decl)
4062 : : {
4063 : 1593 : if (!named_labels)
4064 : : return;
4065 : 1578 : if (TREE_CODE (decl) != LABEL_DECL)
4066 : : {
4067 : : /* We don't know where a computed goto is jumping,
4068 : : so check all addressable labels. */
4069 : 276 : for (auto iter = named_labels->begin ();
4070 : 374 : iter != named_labels->end ();
4071 : 178 : ++iter)
4072 : : {
4073 : 178 : auto ent = *iter;
4074 : 178 : if (ent->addressed)
4075 : 147 : check_goto_1 (ent, true);
4076 : : }
4077 : : }
4078 : : else
4079 : : {
4080 : 1480 : hashval_t hash = IDENTIFIER_HASH_VALUE (DECL_NAME (decl));
4081 : 1480 : named_label_entry **slot
4082 : 1480 : = named_labels->find_slot_with_hash (DECL_NAME (decl), hash, NO_INSERT);
4083 : 1480 : named_label_entry *ent = *slot;
4084 : 1480 : check_goto_1 (ent, false);
4085 : : }
4086 : : }
4087 : :
4088 : : /* Check that a return is ok wrt OpenMP structured blocks.
4089 : : Called by finish_return_stmt. Returns true if all is well. */
4090 : :
4091 : : bool
4092 : 89059 : check_omp_return (void)
4093 : : {
4094 : 362118 : for (cp_binding_level *b = current_binding_level; b ; b = b->level_chain)
4095 : 273059 : if (b->kind == sk_omp)
4096 : : {
4097 : 15 : error ("invalid exit from OpenMP structured block");
4098 : 15 : return false;
4099 : : }
4100 : 273044 : else if (b->kind == sk_function_parms)
4101 : : break;
4102 : : return true;
4103 : : }
4104 : :
4105 : : /* Define a label, specifying the location in the source file.
4106 : : Return the LABEL_DECL node for the label. */
4107 : :
4108 : : tree
4109 : 18676 : define_label (location_t location, tree name)
4110 : : {
4111 : 18676 : auto_cond_timevar tv (TV_NAME_LOOKUP);
4112 : :
4113 : : /* After labels, make any new cleanups in the function go into their
4114 : : own new (temporary) binding contour. */
4115 : 18676 : for (cp_binding_level *p = current_binding_level;
4116 : 26682 : p->kind != sk_function_parms;
4117 : 8006 : p = p->level_chain)
4118 : 8006 : p->more_cleanups_ok = 0;
4119 : :
4120 : 18676 : named_label_entry *ent = lookup_label_1 (name, false);
4121 : 18676 : tree decl = ent->label_decl;
4122 : :
4123 : 18676 : if (DECL_INITIAL (decl) != NULL_TREE)
4124 : : {
4125 : 6 : error ("duplicate label %qD", decl);
4126 : 6 : return error_mark_node;
4127 : : }
4128 : : else
4129 : : {
4130 : : /* Mark label as having been defined. */
4131 : 18670 : DECL_INITIAL (decl) = error_mark_node;
4132 : : /* Say where in the source. */
4133 : 18670 : DECL_SOURCE_LOCATION (decl) = location;
4134 : :
4135 : 18670 : ent->binding_level = current_binding_level;
4136 : 18670 : ent->names_in_scope = current_binding_level->names;
4137 : :
4138 : 19752 : for (named_label_use_entry *use = ent->uses; use; use = use->next)
4139 : 1082 : check_previous_goto (decl, use);
4140 : 18670 : ent->uses = NULL;
4141 : : }
4142 : :
4143 : 18670 : return decl;
4144 : 18676 : }
4145 : :
4146 : : struct cp_switch
4147 : : {
4148 : : cp_binding_level *level;
4149 : : struct cp_switch *next;
4150 : : /* The SWITCH_STMT being built. */
4151 : : tree switch_stmt;
4152 : : /* A splay-tree mapping the low element of a case range to the high
4153 : : element, or NULL_TREE if there is no high element. Used to
4154 : : determine whether or not a new case label duplicates an old case
4155 : : label. We need a tree, rather than simply a hash table, because
4156 : : of the GNU case range extension. */
4157 : : splay_tree cases;
4158 : : /* Remember whether a default: case label has been seen. */
4159 : : bool has_default_p;
4160 : : /* Remember whether a BREAK_STMT has been seen in this SWITCH_STMT. */
4161 : : bool break_stmt_seen_p;
4162 : : /* Set if inside of {FOR,DO,WHILE}_BODY nested inside of a switch,
4163 : : where BREAK_STMT doesn't belong to the SWITCH_STMT. */
4164 : : bool in_loop_body_p;
4165 : : };
4166 : :
4167 : : /* A stack of the currently active switch statements. The innermost
4168 : : switch statement is on the top of the stack. There is no need to
4169 : : mark the stack for garbage collection because it is only active
4170 : : during the processing of the body of a function, and we never
4171 : : collect at that point. */
4172 : :
4173 : : static struct cp_switch *switch_stack;
4174 : :
4175 : : /* Called right after a switch-statement condition is parsed.
4176 : : SWITCH_STMT is the switch statement being parsed. */
4177 : :
4178 : : void
4179 : 424108 : push_switch (tree switch_stmt)
4180 : : {
4181 : 424108 : struct cp_switch *p = XNEW (struct cp_switch);
4182 : 424108 : p->level = current_binding_level;
4183 : 424108 : p->next = switch_stack;
4184 : 424108 : p->switch_stmt = switch_stmt;
4185 : 424108 : p->cases = splay_tree_new (case_compare, NULL, NULL);
4186 : 424108 : p->has_default_p = false;
4187 : 424108 : p->break_stmt_seen_p = false;
4188 : 424108 : p->in_loop_body_p = false;
4189 : 424108 : switch_stack = p;
4190 : 424108 : }
4191 : :
4192 : : void
4193 : 424108 : pop_switch (void)
4194 : : {
4195 : 424108 : struct cp_switch *cs = switch_stack;
4196 : :
4197 : : /* Emit warnings as needed. */
4198 : 424108 : location_t switch_location = cp_expr_loc_or_input_loc (cs->switch_stmt);
4199 : 424108 : tree cond = SWITCH_STMT_COND (cs->switch_stmt);
4200 : 424108 : const bool bool_cond_p
4201 : 424108 : = (SWITCH_STMT_TYPE (cs->switch_stmt)
4202 : 424108 : && TREE_CODE (SWITCH_STMT_TYPE (cs->switch_stmt)) == BOOLEAN_TYPE);
4203 : 424108 : if (!processing_template_decl)
4204 : 271404 : c_do_switch_warnings (cs->cases, switch_location,
4205 : 271404 : SWITCH_STMT_TYPE (cs->switch_stmt), cond,
4206 : : bool_cond_p);
4207 : :
4208 : : /* For the benefit of block_may_fallthru remember if the switch body
4209 : : case labels cover all possible values and if there are break; stmts. */
4210 : 424108 : if (cs->has_default_p
4211 : 424108 : || (!processing_template_decl
4212 : 33538 : && c_switch_covers_all_cases_p (cs->cases,
4213 : 33538 : SWITCH_STMT_TYPE (cs->switch_stmt))))
4214 : 330774 : SWITCH_STMT_ALL_CASES_P (cs->switch_stmt) = 1;
4215 : 424108 : if (!cs->break_stmt_seen_p)
4216 : 205723 : SWITCH_STMT_NO_BREAK_P (cs->switch_stmt) = 1;
4217 : : /* Now that we're done with the switch warnings, set the switch type
4218 : : to the type of the condition if the index type was of scoped enum type.
4219 : : (Such types don't participate in the integer promotions.) We do this
4220 : : because of bit-fields whose declared type is a scoped enum type:
4221 : : gimplification will use the lowered index type, but convert the
4222 : : case values to SWITCH_STMT_TYPE, which would have been the declared type
4223 : : and verify_gimple_switch doesn't accept that. */
4224 : 424108 : if (is_bitfield_expr_with_lowered_type (cond))
4225 : 13 : SWITCH_STMT_TYPE (cs->switch_stmt) = TREE_TYPE (cond);
4226 : 424108 : gcc_assert (!cs->in_loop_body_p);
4227 : 424108 : splay_tree_delete (cs->cases);
4228 : 424108 : switch_stack = switch_stack->next;
4229 : 424108 : free (cs);
4230 : 424108 : }
4231 : :
4232 : : /* Note that a BREAK_STMT is about to be added. If it is inside of
4233 : : a SWITCH_STMT and not inside of a loop body inside of it, note
4234 : : in switch_stack we've seen a BREAK_STMT. */
4235 : :
4236 : : void
4237 : 3318380 : note_break_stmt (void)
4238 : : {
4239 : 3318380 : if (switch_stack && !switch_stack->in_loop_body_p)
4240 : 1405864 : switch_stack->break_stmt_seen_p = true;
4241 : 3318380 : }
4242 : :
4243 : : /* Note the start of processing of an iteration statement's body.
4244 : : The note_break_stmt function will do nothing while processing it.
4245 : : Return a flag that should be passed to note_iteration_stmt_body_end. */
4246 : :
4247 : : bool
4248 : 14579843 : note_iteration_stmt_body_start (void)
4249 : : {
4250 : 14579843 : if (!switch_stack)
4251 : : return false;
4252 : 108896 : bool ret = switch_stack->in_loop_body_p;
4253 : 108896 : switch_stack->in_loop_body_p = true;
4254 : 108896 : return ret;
4255 : : }
4256 : :
4257 : : /* Note the end of processing of an iteration statement's body. */
4258 : :
4259 : : void
4260 : 14579843 : note_iteration_stmt_body_end (bool prev)
4261 : : {
4262 : 14579843 : if (switch_stack)
4263 : 108896 : switch_stack->in_loop_body_p = prev;
4264 : 14579843 : }
4265 : :
4266 : : /* Convert a case constant VALUE in a switch to the type TYPE of the switch
4267 : : condition. Note that if TYPE and VALUE are already integral we don't
4268 : : really do the conversion because the language-independent
4269 : : warning/optimization code will work better that way. */
4270 : :
4271 : : static tree
4272 : 3390792 : case_conversion (tree type, tree value)
4273 : : {
4274 : 3390792 : if (value == NULL_TREE)
4275 : : return value;
4276 : :
4277 : 1457692 : value = mark_rvalue_use (value);
4278 : :
4279 : 1457692 : if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
4280 : 1443743 : type = type_promotes_to (type);
4281 : :
4282 : 1457692 : tree ovalue = value;
4283 : : /* The constant-expression VALUE shall be a converted constant expression
4284 : : of the adjusted type of the switch condition, which doesn't allow
4285 : : narrowing conversions. */
4286 : 1457692 : value = build_converted_constant_expr (type, value, tf_warning_or_error);
4287 : :
4288 : 1457692 : if (cxx_dialect >= cxx11
4289 : 1457692 : && (SCOPED_ENUM_P (type)
4290 : 1441040 : || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ovalue))))
4291 : : /* Use the converted value. */;
4292 : : else
4293 : : /* The already integral case. */
4294 : : value = ovalue;
4295 : :
4296 : 1457692 : return cxx_constant_value (value);
4297 : : }
4298 : :
4299 : : /* Note that we've seen a definition of a case label, and complain if this
4300 : : is a bad place for one. */
4301 : :
4302 : : tree
4303 : 3135565 : finish_case_label (location_t loc, tree low_value, tree high_value)
4304 : : {
4305 : 3135565 : tree cond, r;
4306 : 3135565 : cp_binding_level *p;
4307 : 3135565 : tree type;
4308 : :
4309 : 3135565 : if (low_value == NULL_TREE && high_value == NULL_TREE)
4310 : 330738 : switch_stack->has_default_p = true;
4311 : :
4312 : 3135565 : if (processing_template_decl)
4313 : : {
4314 : 1440046 : tree label;
4315 : :
4316 : : /* For templates, just add the case label; we'll do semantic
4317 : : analysis at instantiation-time. */
4318 : 1440046 : label = build_decl (loc, LABEL_DECL, NULL_TREE, void_type_node);
4319 : 1440046 : return add_stmt (build_case_label (low_value, high_value, label));
4320 : : }
4321 : :
4322 : : /* Find the condition on which this switch statement depends. */
4323 : 1695519 : cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
4324 : 1695519 : if (cond && TREE_CODE (cond) == TREE_LIST)
4325 : 0 : cond = TREE_VALUE (cond);
4326 : :
4327 : 1695519 : if (!check_switch_goto (switch_stack->level))
4328 : 87 : return error_mark_node;
4329 : :
4330 : 1695432 : type = SWITCH_STMT_TYPE (switch_stack->switch_stmt);
4331 : 1695432 : if (type == error_mark_node)
4332 : : return error_mark_node;
4333 : :
4334 : 1695396 : low_value = case_conversion (type, low_value);
4335 : 1695396 : high_value = case_conversion (type, high_value);
4336 : :
4337 : 1695396 : r = c_add_case_label (loc, switch_stack->cases, cond, low_value, high_value);
4338 : :
4339 : : /* After labels, make any new cleanups in the function go into their
4340 : : own new (temporary) binding contour. */
4341 : 1695396 : for (p = current_binding_level;
4342 : 7151164 : p->kind != sk_function_parms;
4343 : 5455768 : p = p->level_chain)
4344 : 5455768 : p->more_cleanups_ok = 0;
4345 : :
4346 : : return r;
4347 : : }
4348 : :
4349 : : struct typename_info {
4350 : : tree scope;
4351 : : tree name;
4352 : : tree template_id;
4353 : : bool enum_p;
4354 : : bool class_p;
4355 : : };
4356 : :
4357 : : struct typename_hasher : ggc_ptr_hash<tree_node>
4358 : : {
4359 : : typedef typename_info *compare_type;
4360 : :
4361 : : /* Hash a TYPENAME_TYPE. */
4362 : :
4363 : : static hashval_t
4364 : 364818996 : hash (tree context, tree fullname)
4365 : : {
4366 : 364818996 : hashval_t hash = 0;
4367 : 364818996 : hash = iterative_hash_object (context, hash);
4368 : 364818996 : hash = iterative_hash_object (fullname, hash);
4369 : 364818996 : return hash;
4370 : : }
4371 : :
4372 : : static hashval_t
4373 : 52943823 : hash (const typename_info *ti)
4374 : : {
4375 : 52943823 : return typename_hasher::hash (ti->scope, ti->template_id);
4376 : : }
4377 : :
4378 : : static hashval_t
4379 : 311875173 : hash (tree t)
4380 : : {
4381 : 311875173 : return typename_hasher::hash (TYPE_CONTEXT (t), TYPENAME_TYPE_FULLNAME (t));
4382 : : }
4383 : :
4384 : : /* Compare two TYPENAME_TYPEs. */
4385 : :
4386 : : static bool
4387 : 361968897 : equal (tree t1, const typename_info *t2)
4388 : : {
4389 : 361968897 : return (TYPE_IDENTIFIER (t1) == t2->name
4390 : 106986104 : && TYPE_CONTEXT (t1) == t2->scope
4391 : 26669079 : && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
4392 : 26659486 : && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
4393 : 388628329 : && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
4394 : : }
4395 : : };
4396 : :
4397 : : /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
4398 : : the type of `T', NAME is the IDENTIFIER_NODE for `t'.
4399 : :
4400 : : Returns the new TYPENAME_TYPE. */
4401 : :
4402 : : static GTY (()) hash_table<typename_hasher> *typename_htab;
4403 : :
4404 : : tree
4405 : 52943823 : build_typename_type (tree context, tree name, tree fullname,
4406 : : enum tag_types tag_type)
4407 : : {
4408 : 52943823 : typename_info ti;
4409 : :
4410 : 52943823 : if (typename_htab == NULL)
4411 : 18192 : typename_htab = hash_table<typename_hasher>::create_ggc (61);
4412 : :
4413 : 52943823 : ti.scope = FROB_CONTEXT (context);
4414 : 52943823 : ti.name = name;
4415 : 52943823 : ti.template_id = fullname;
4416 : 52943823 : ti.enum_p = tag_type == enum_type;
4417 : 52943823 : ti.class_p = (tag_type == class_type
4418 : : || tag_type == record_type
4419 : 52943823 : || tag_type == union_type);
4420 : 52943823 : hashval_t hash = typename_hasher::hash (&ti);
4421 : :
4422 : : /* See if we already have this type. */
4423 : 52943823 : tree *e = typename_htab->find_slot_with_hash (&ti, hash, INSERT);
4424 : 52943823 : tree t = *e;
4425 : 52943823 : if (*e)
4426 : : t = *e;
4427 : : else
4428 : : {
4429 : : /* Build the TYPENAME_TYPE. */
4430 : 26284415 : t = cxx_make_type (TYPENAME_TYPE);
4431 : 26284415 : TYPE_CONTEXT (t) = ti.scope;
4432 : 26284415 : TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
4433 : 26284415 : TYPENAME_IS_ENUM_P (t) = ti.enum_p;
4434 : 26284415 : TYPENAME_IS_CLASS_P (t) = ti.class_p;
4435 : :
4436 : : /* Build the corresponding TYPE_DECL. */
4437 : 26284415 : tree d = build_decl (input_location, TYPE_DECL, name, t);
4438 : 26284415 : TYPE_NAME (t) = d;
4439 : 26284415 : TYPE_STUB_DECL (t) = d;
4440 : 26284415 : DECL_CONTEXT (d) = ti.scope;
4441 : 26284415 : DECL_ARTIFICIAL (d) = 1;
4442 : :
4443 : : /* Store it in the hash table. */
4444 : 26284415 : *e = t;
4445 : :
4446 : : /* TYPENAME_TYPEs must always be compared structurally, because
4447 : : they may or may not resolve down to another type depending on
4448 : : the currently open classes. */
4449 : 26284415 : SET_TYPE_STRUCTURAL_EQUALITY (t);
4450 : : }
4451 : :
4452 : 52943823 : return t;
4453 : : }
4454 : :
4455 : : /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
4456 : : provided to name the type. Returns an appropriate type, unless an
4457 : : error occurs, in which case error_mark_node is returned. If we
4458 : : locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
4459 : : return that, rather than the _TYPE it corresponds to, in other
4460 : : cases we look through the type decl. If TF_ERROR is set, complain
4461 : : about errors, otherwise be quiet. */
4462 : :
4463 : : tree
4464 : 159435816 : make_typename_type (tree context, tree name, enum tag_types tag_type,
4465 : : tsubst_flags_t complain)
4466 : : {
4467 : 159435816 : tree fullname;
4468 : 159435816 : tree t;
4469 : 159435816 : bool want_template;
4470 : :
4471 : 159435816 : if (name == error_mark_node
4472 : 159435814 : || context == NULL_TREE
4473 : 159435814 : || context == error_mark_node)
4474 : : return error_mark_node;
4475 : :
4476 : 159435801 : if (TYPE_P (name))
4477 : : {
4478 : 0 : if (!(TYPE_LANG_SPECIFIC (name)
4479 : 0 : && (CLASSTYPE_IS_TEMPLATE (name)
4480 : 0 : || CLASSTYPE_USE_TEMPLATE (name))))
4481 : 0 : name = TYPE_IDENTIFIER (name);
4482 : : else
4483 : : /* Create a TEMPLATE_ID_EXPR for the type. */
4484 : 0 : name = build_nt (TEMPLATE_ID_EXPR,
4485 : 0 : CLASSTYPE_TI_TEMPLATE (name),
4486 : 0 : CLASSTYPE_TI_ARGS (name));
4487 : : }
4488 : 159435801 : else if (TREE_CODE (name) == TYPE_DECL)
4489 : 0 : name = DECL_NAME (name);
4490 : :
4491 : 159435801 : fullname = name;
4492 : :
4493 : 159435801 : if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
4494 : : {
4495 : 5350238 : name = TREE_OPERAND (name, 0);
4496 : 5350238 : if (DECL_TYPE_TEMPLATE_P (name))
4497 : 0 : name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
4498 : 5350238 : if (TREE_CODE (name) != IDENTIFIER_NODE)
4499 : : {
4500 : 0 : if (complain & tf_error)
4501 : 0 : error ("%qD is not a type", name);
4502 : 0 : return error_mark_node;
4503 : : }
4504 : : }
4505 : 159435801 : if (TREE_CODE (name) == TEMPLATE_DECL)
4506 : : {
4507 : 0 : if (complain & tf_error)
4508 : 0 : error ("%qD used without template arguments", name);
4509 : 0 : return error_mark_node;
4510 : : }
4511 : 159435801 : else if (is_overloaded_fn (name))
4512 : : {
4513 : 3 : if (complain & tf_error)
4514 : 3 : error ("%qD is a function, not a type", name);
4515 : 3 : return error_mark_node;
4516 : : }
4517 : 159435798 : gcc_assert (identifier_p (name));
4518 : 159435798 : gcc_assert (TYPE_P (context));
4519 : :
4520 : 159435798 : if (TREE_CODE (context) == TYPE_PACK_EXPANSION)
4521 : : /* This can happen for C++17 variadic using (c++/88986). */;
4522 : 148202025 : else if (!MAYBE_CLASS_TYPE_P (context))
4523 : : {
4524 : 6 : if (complain & tf_error)
4525 : 6 : error ("%q#T is not a class", context);
4526 : 6 : return error_mark_node;
4527 : : }
4528 : :
4529 : : /* When the CONTEXT is a dependent type, NAME could refer to a
4530 : : dependent base class of CONTEXT. But look inside it anyway
4531 : : if CONTEXT is a currently open scope, in case it refers to a
4532 : : member of the current instantiation or a non-dependent base;
4533 : : lookup will stop when we hit a dependent base. */
4534 : 159435792 : if (!dependent_scope_p (context))
4535 : : {
4536 : : /* We generally don't ignore non-types during TYPENAME_TYPE lookup
4537 : : (as per [temp.res.general]/3), unless
4538 : : - the tag corresponds to a class-key or 'enum' so
4539 : : [basic.lookup.elab] applies, or
4540 : : - the tag corresponds to scope_type or tf_qualifying_scope is
4541 : : set so [basic.lookup.qual]/1 applies.
4542 : : TODO: If we'd set/track the scope_type tag thoroughly on all
4543 : : TYPENAME_TYPEs that are followed by :: then we wouldn't need the
4544 : : tf_qualifying_scope flag. */
4545 : 220682062 : bool want_type = (tag_type != none_type && tag_type != typename_type)
4546 : 110341031 : || (complain & tf_qualifying_scope);
4547 : 110341031 : t = lookup_member (context, name, /*protect=*/2, want_type, complain);
4548 : : }
4549 : : else
4550 : : t = NULL_TREE;
4551 : :
4552 : 175232126 : if ((!t || TREE_CODE (t) == TREE_LIST) && dependentish_scope_p (context))
4553 : 49095724 : return build_typename_type (context, name, fullname, tag_type);
4554 : :
4555 : 110340068 : want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
4556 : :
4557 : 110340068 : if (!t)
4558 : : {
4559 : 15795371 : if (complain & tf_error)
4560 : : {
4561 : 232 : if (!COMPLETE_TYPE_P (context))
4562 : 18 : cxx_incomplete_type_error (NULL_TREE, context);
4563 : : else
4564 : 427 : error (want_template ? G_("no class template named %q#T in %q#T")
4565 : : : G_("no type named %q#T in %q#T"), name, context);
4566 : : }
4567 : 15795371 : return error_mark_node;
4568 : : }
4569 : :
4570 : : /* Pull out the template from an injected-class-name (or multiple). */
4571 : 94544697 : if (want_template)
4572 : 4021804 : t = maybe_get_template_decl_from_type_decl (t);
4573 : :
4574 : 94544697 : if (TREE_CODE (t) == TREE_LIST)
4575 : : {
4576 : 3 : if (complain & tf_error)
4577 : : {
4578 : 3 : auto_diagnostic_group d;
4579 : 3 : error ("lookup of %qT in %qT is ambiguous", name, context);
4580 : 3 : print_candidates (t);
4581 : 3 : }
4582 : 3 : return error_mark_node;
4583 : : }
4584 : :
4585 : 94544694 : if (want_template && !DECL_TYPE_TEMPLATE_P (t))
4586 : : {
4587 : 6 : if (complain & tf_error)
4588 : 6 : error ("%<typename %T::%D%> names %q#T, which is not a class template",
4589 : : context, name, t);
4590 : 6 : return error_mark_node;
4591 : : }
4592 : 94544688 : if (!want_template && TREE_CODE (t) != TYPE_DECL)
4593 : : {
4594 : 15 : if ((complain & tf_tst_ok) && cxx_dialect >= cxx17
4595 : 33 : && DECL_TYPE_TEMPLATE_P (t))
4596 : : /* The caller permits this typename-specifier to name a template
4597 : : (because it appears in a CTAD-enabled context). */;
4598 : : else
4599 : : {
4600 : 23 : if (complain & tf_error)
4601 : 17 : error ("%<typename %T::%D%> names %q#D, which is not a type",
4602 : : context, name, t);
4603 : 23 : return error_mark_node;
4604 : : }
4605 : : }
4606 : :
4607 : 94544665 : if (!check_accessibility_of_qualified_id (t, /*object_type=*/NULL_TREE,
4608 : : context, complain))
4609 : 45 : return error_mark_node;
4610 : :
4611 : 94544620 : if (!want_template && DECL_TYPE_TEMPLATE_P (t))
4612 : 4 : return make_template_placeholder (t);
4613 : :
4614 : 94544616 : if (want_template)
4615 : : {
4616 : 4021798 : t = lookup_template_class (t, TREE_OPERAND (fullname, 1),
4617 : : NULL_TREE, context,
4618 : : complain | tf_user);
4619 : 4021798 : if (t == error_mark_node)
4620 : : return error_mark_node;
4621 : 4021793 : t = TYPE_NAME (t);
4622 : : }
4623 : :
4624 : 94544611 : if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
4625 : 3235514 : t = TREE_TYPE (t);
4626 : :
4627 : 94544611 : maybe_record_typedef_use (t);
4628 : :
4629 : 94544611 : return t;
4630 : : }
4631 : :
4632 : : /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
4633 : : can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
4634 : : in which case error_mark_node is returned.
4635 : :
4636 : : If PARM_LIST is non-NULL, also make sure that the template parameter
4637 : : list of TEMPLATE_DECL matches.
4638 : :
4639 : : If COMPLAIN zero, don't complain about any errors that occur. */
4640 : :
4641 : : tree
4642 : 73948 : make_unbound_class_template (tree context, tree name, tree parm_list,
4643 : : tsubst_flags_t complain)
4644 : : {
4645 : 73948 : if (TYPE_P (name))
4646 : 0 : name = TYPE_IDENTIFIER (name);
4647 : 73948 : else if (DECL_P (name))
4648 : 0 : name = DECL_NAME (name);
4649 : 73948 : gcc_assert (identifier_p (name));
4650 : :
4651 : 73948 : if (!dependent_type_p (context)
4652 : 73948 : || currently_open_class (context))
4653 : : {
4654 : 22893 : tree tmpl = NULL_TREE;
4655 : :
4656 : 22893 : if (MAYBE_CLASS_TYPE_P (context))
4657 : 22887 : tmpl = lookup_field (context, name, 0, false);
4658 : :
4659 : 22887 : if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
4660 : 3 : tmpl = maybe_get_template_decl_from_type_decl (tmpl);
4661 : :
4662 : 22881 : if (!tmpl || !DECL_TYPE_TEMPLATE_P (tmpl))
4663 : : {
4664 : 12 : if (complain & tf_error)
4665 : 9 : error ("no class template named %q#T in %q#T", name, context);
4666 : 12 : return error_mark_node;
4667 : : }
4668 : :
4669 : 22881 : if (parm_list
4670 : 22881 : && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
4671 : : {
4672 : 0 : if (complain & tf_error)
4673 : : {
4674 : 0 : auto_diagnostic_group d;
4675 : 0 : error ("template parameters do not match template %qD", tmpl);
4676 : 0 : inform (DECL_SOURCE_LOCATION (tmpl),
4677 : : "%qD declared here", tmpl);
4678 : 0 : }
4679 : 0 : return error_mark_node;
4680 : : }
4681 : :
4682 : 22881 : if (!perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl,
4683 : : complain))
4684 : 0 : return error_mark_node;
4685 : :
4686 : : return tmpl;
4687 : : }
4688 : :
4689 : 51055 : return make_unbound_class_template_raw (context, name, parm_list);
4690 : : }
4691 : :
4692 : : /* Build an UNBOUND_CLASS_TEMPLATE. */
4693 : :
4694 : : tree
4695 : 51124 : make_unbound_class_template_raw (tree context, tree name, tree parm_list)
4696 : : {
4697 : : /* Build the UNBOUND_CLASS_TEMPLATE. */
4698 : 51124 : tree t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
4699 : 51124 : TYPE_CONTEXT (t) = FROB_CONTEXT (context);
4700 : 51124 : TREE_TYPE (t) = NULL_TREE;
4701 : 51124 : SET_TYPE_STRUCTURAL_EQUALITY (t);
4702 : :
4703 : : /* Build the corresponding TEMPLATE_DECL. */
4704 : 51124 : tree d = build_decl (input_location, TEMPLATE_DECL, name, t);
4705 : 51124 : TYPE_NAME (t) = d;
4706 : 51124 : TYPE_STUB_DECL (t) = d;
4707 : 51124 : DECL_CONTEXT (d) = TYPE_CONTEXT (t);
4708 : 51124 : DECL_ARTIFICIAL (d) = 1;
4709 : 51124 : DECL_TEMPLATE_PARMS (d) = parm_list;
4710 : :
4711 : 51124 : return t;
4712 : : }
4713 : :
4714 : :
4715 : :
4716 : : /* Push the declarations of builtin types into the global namespace.
4717 : : RID_INDEX is the index of the builtin type in the array
4718 : : RID_POINTERS. NAME is the name used when looking up the builtin
4719 : : type. TYPE is the _TYPE node for the builtin type.
4720 : :
4721 : : The calls to set_global_binding below should be
4722 : : eliminated. Built-in types should not be looked up name; their
4723 : : names are keywords that the parser can recognize. However, there
4724 : : is code in c-common.cc that uses identifier_global_value to look up
4725 : : built-in types by name. */
4726 : :
4727 : : void
4728 : 3774128 : record_builtin_type (enum rid rid_index,
4729 : : const char* name,
4730 : : tree type)
4731 : : {
4732 : 3774128 : tree decl = NULL_TREE;
4733 : :
4734 : 3774128 : if (name)
4735 : : {
4736 : 2209720 : tree tname = get_identifier (name);
4737 : 2209720 : tree tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
4738 : 2209720 : DECL_ARTIFICIAL (tdecl) = 1;
4739 : 2209720 : set_global_binding (tdecl);
4740 : 2209720 : decl = tdecl;
4741 : : }
4742 : :
4743 : 3774128 : if ((int) rid_index < (int) RID_MAX)
4744 : 2301744 : if (tree rname = ridpointers[(int) rid_index])
4745 : 1749600 : if (!decl || DECL_NAME (decl) != rname)
4746 : : {
4747 : 1288336 : tree rdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
4748 : 1288336 : DECL_ARTIFICIAL (rdecl) = 1;
4749 : 1288336 : set_global_binding (rdecl);
4750 : 1288336 : if (!decl)
4751 : : decl = rdecl;
4752 : : }
4753 : :
4754 : 3498056 : if (decl)
4755 : : {
4756 : 3221984 : if (!TYPE_NAME (type))
4757 : 2669840 : TYPE_NAME (type) = decl;
4758 : 3221984 : debug_hooks->type_decl (decl, 0);
4759 : : }
4760 : 3774128 : }
4761 : :
4762 : : /* Push a type into the namespace so that the back ends ignore it. */
4763 : :
4764 : : static void
4765 : 276072 : record_unknown_type (tree type, const char* name)
4766 : : {
4767 : 276072 : tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
4768 : : TYPE_DECL, get_identifier (name), type));
4769 : : /* Make sure the "unknown type" typedecl gets ignored for debug info. */
4770 : 276072 : DECL_IGNORED_P (decl) = 1;
4771 : 276072 : TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4772 : 276072 : TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
4773 : 276072 : SET_TYPE_ALIGN (type, 1);
4774 : 276072 : TYPE_USER_ALIGN (type) = 0;
4775 : 276072 : SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
4776 : 276072 : }
4777 : :
4778 : : /* Create all the predefined identifiers. */
4779 : :
4780 : : static void
4781 : 92024 : initialize_predefined_identifiers (void)
4782 : : {
4783 : 92024 : struct predefined_identifier
4784 : : {
4785 : : const char *name; /* Name. */
4786 : : tree *node; /* Node to store it in. */
4787 : : cp_identifier_kind kind; /* Kind of identifier. */
4788 : : };
4789 : :
4790 : : /* A table of identifiers to create at startup. */
4791 : 92024 : static const predefined_identifier predefined_identifiers[] = {
4792 : : {"C++", &lang_name_cplusplus, cik_normal},
4793 : : {"C", &lang_name_c, cik_normal},
4794 : : /* Some of these names have a trailing space so that it is
4795 : : impossible for them to conflict with names written by users. */
4796 : : {"__ct ", &ctor_identifier, cik_ctor},
4797 : : {"__ct_base ", &base_ctor_identifier, cik_ctor},
4798 : : {"__ct_comp ", &complete_ctor_identifier, cik_ctor},
4799 : : {"__dt ", &dtor_identifier, cik_dtor},
4800 : : {"__dt_base ", &base_dtor_identifier, cik_dtor},
4801 : : {"__dt_comp ", &complete_dtor_identifier, cik_dtor},
4802 : : {"__dt_del ", &deleting_dtor_identifier, cik_dtor},
4803 : : {"__conv_op ", &conv_op_identifier, cik_conv_op},
4804 : : {"__in_chrg", &in_charge_identifier, cik_normal},
4805 : : {"__as_base ", &as_base_identifier, cik_normal},
4806 : : {"this", &this_identifier, cik_normal},
4807 : : {"__delta", &delta_identifier, cik_normal},
4808 : : {"__pfn", &pfn_identifier, cik_normal},
4809 : : {"_vptr", &vptr_identifier, cik_normal},
4810 : : {"__vtt_parm", &vtt_parm_identifier, cik_normal},
4811 : : {"::", &global_identifier, cik_normal},
4812 : : /* The demangler expects anonymous namespaces to be called
4813 : : something starting with '_GLOBAL__N_'. It no longer needs
4814 : : to be unique to the TU. */
4815 : : {"_GLOBAL__N_1", &anon_identifier, cik_normal},
4816 : : {"auto", &auto_identifier, cik_normal},
4817 : : {"decltype(auto)", &decltype_auto_identifier, cik_normal},
4818 : : {"initializer_list", &init_list_identifier, cik_normal},
4819 : : {"__for_range ", &for_range__identifier, cik_normal},
4820 : : {"__for_begin ", &for_begin__identifier, cik_normal},
4821 : : {"__for_end ", &for_end__identifier, cik_normal},
4822 : : {"__for_range", &for_range_identifier, cik_normal},
4823 : : {"__for_begin", &for_begin_identifier, cik_normal},
4824 : : {"__for_end", &for_end_identifier, cik_normal},
4825 : : {"abi_tag", &abi_tag_identifier, cik_normal},
4826 : : {"aligned", &aligned_identifier, cik_normal},
4827 : : {"begin", &begin_identifier, cik_normal},
4828 : : {"end", &end_identifier, cik_normal},
4829 : : {"get", &get__identifier, cik_normal},
4830 : : {"gnu", &gnu_identifier, cik_normal},
4831 : : {"tuple_element", &tuple_element_identifier, cik_normal},
4832 : : {"tuple_size", &tuple_size_identifier, cik_normal},
4833 : : {"type", &type_identifier, cik_normal},
4834 : : {"value", &value_identifier, cik_normal},
4835 : : {"_FUN", &fun_identifier, cik_normal},
4836 : : {"__closure", &closure_identifier, cik_normal},
4837 : : {"heap uninit", &heap_uninit_identifier, cik_normal},
4838 : : {"heap ", &heap_identifier, cik_normal},
4839 : : {"heap deleted", &heap_deleted_identifier, cik_normal},
4840 : : {"heap [] uninit", &heap_vec_uninit_identifier, cik_normal},
4841 : : {"heap []", &heap_vec_identifier, cik_normal},
4842 : : {"omp", &omp_identifier, cik_normal},
4843 : : {"internal ", &internal_identifier, cik_normal},
4844 : : {NULL, NULL, cik_normal}
4845 : : };
4846 : :
4847 : 4417152 : for (const predefined_identifier *pid = predefined_identifiers;
4848 : 4417152 : pid->name; ++pid)
4849 : : {
4850 : 4325128 : *pid->node = get_identifier (pid->name);
4851 : : /* Some of these identifiers already have a special kind. */
4852 : 4325128 : if (pid->kind != cik_normal)
4853 : 736192 : set_identifier_kind (*pid->node, pid->kind);
4854 : : }
4855 : 92024 : }
4856 : :
4857 : : /* Build a specific variant of operator new. */
4858 : :
4859 : : static void
4860 : 163831 : cxx_build_operator_new (tree newtype)
4861 : : {
4862 : 163831 : tree opnew = push_cp_library_fn (NEW_EXPR, newtype, 0);
4863 : 163831 : DECL_IS_MALLOC (opnew) = 1;
4864 : 163831 : DECL_SET_IS_OPERATOR_NEW (opnew, true);
4865 : 163831 : DECL_IS_REPLACEABLE_OPERATOR (opnew) = 1;
4866 : 163831 : opnew = push_cp_library_fn (VEC_NEW_EXPR, newtype, 0);
4867 : 163831 : DECL_IS_MALLOC (opnew) = 1;
4868 : 163831 : DECL_SET_IS_OPERATOR_NEW (opnew, true);
4869 : 163831 : DECL_IS_REPLACEABLE_OPERATOR (opnew) = 1;
4870 : 163831 : }
4871 : :
4872 : : /* Build a specific variant of operator delete. */
4873 : :
4874 : : static void
4875 : 308622 : cxx_build_operator_delete (tree deltype)
4876 : : {
4877 : 308622 : tree opdel = push_cp_library_fn (DELETE_EXPR, deltype, ECF_NOTHROW);
4878 : 308622 : DECL_SET_IS_OPERATOR_DELETE (opdel, true);
4879 : 308622 : DECL_IS_REPLACEABLE_OPERATOR (opdel) = 1;
4880 : 308622 : opdel = push_cp_library_fn (VEC_DELETE_EXPR, deltype, ECF_NOTHROW);
4881 : 308622 : DECL_SET_IS_OPERATOR_DELETE (opdel, true);
4882 : 308622 : DECL_IS_REPLACEABLE_OPERATOR (opdel) = 1;
4883 : 308622 : }
4884 : :
4885 : : /* Declare all variants of operator new and delete. */
4886 : :
4887 : : static void
4888 : 92024 : cxx_init_operator_new_delete_decls (void)
4889 : : {
4890 : 92024 : tree newattrs, extvisattr;
4891 : 92024 : tree newtype, deltype;
4892 : 92024 : tree ptr_ftype_sizetype;
4893 : 92024 : tree new_eh_spec;
4894 : 92024 : tree void_ftype_ptr = build_function_type_list (void_type_node,
4895 : : ptr_type_node, NULL_TREE);
4896 : 92024 : void_ftype_ptr
4897 : 92024 : = build_exception_variant (void_ftype_ptr, empty_except_spec);
4898 : :
4899 : 92024 : ptr_ftype_sizetype
4900 : 92024 : = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
4901 : 92024 : if (cxx_dialect == cxx98)
4902 : : {
4903 : 13675 : tree bad_alloc_id;
4904 : 13675 : tree bad_alloc_type_node;
4905 : 13675 : tree bad_alloc_decl;
4906 : :
4907 : 13675 : push_nested_namespace (std_node);
4908 : 13675 : bad_alloc_id = get_identifier ("bad_alloc");
4909 : 13675 : bad_alloc_type_node = make_class_type (RECORD_TYPE);
4910 : 13675 : TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
4911 : 13675 : bad_alloc_decl
4912 : 13675 : = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
4913 : 13675 : DECL_CONTEXT (bad_alloc_decl) = current_namespace;
4914 : 13675 : pop_nested_namespace (std_node);
4915 : :
4916 : 13675 : new_eh_spec
4917 : 13675 : = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
4918 : : }
4919 : : else
4920 : 78349 : new_eh_spec = noexcept_false_spec;
4921 : :
4922 : 92024 : extvisattr = build_tree_list (get_identifier ("externally_visible"),
4923 : : NULL_TREE);
4924 : 92024 : newattrs = tree_cons (get_identifier ("alloc_size"),
4925 : : build_tree_list (NULL_TREE, integer_one_node),
4926 : : extvisattr);
4927 : 92024 : newtype = cp_build_type_attribute_variant (ptr_ftype_sizetype, newattrs);
4928 : 92024 : newtype = build_exception_variant (newtype, new_eh_spec);
4929 : 92024 : deltype = cp_build_type_attribute_variant (void_ftype_ptr, extvisattr);
4930 : 92024 : deltype = build_exception_variant (deltype, empty_except_spec);
4931 : 92024 : cxx_build_operator_new (newtype);
4932 : 92024 : cxx_build_operator_delete (deltype);
4933 : 92024 : if (flag_sized_deallocation)
4934 : : {
4935 : : /* Also push the sized deallocation variants:
4936 : : void operator delete(void*, std::size_t) throw();
4937 : : void operator delete[](void*, std::size_t) throw(); */
4938 : 72989 : tree void_ftype_ptr_size
4939 : 72989 : = build_function_type_list (void_type_node, ptr_type_node,
4940 : : size_type_node, NULL_TREE);
4941 : 72989 : deltype = cp_build_type_attribute_variant (void_ftype_ptr_size,
4942 : : extvisattr);
4943 : 72989 : deltype = build_exception_variant (deltype, empty_except_spec);
4944 : 72989 : cxx_build_operator_delete (deltype);
4945 : : }
4946 : :
4947 : 92024 : if (aligned_new_threshold)
4948 : : {
4949 : 71807 : push_nested_namespace (std_node);
4950 : 71807 : tree align_id = get_identifier ("align_val_t");
4951 : 71807 : align_type_node = start_enum (align_id, NULL_TREE, size_type_node,
4952 : : NULL_TREE, /*scoped*/true, NULL);
4953 : 71807 : pop_nested_namespace (std_node);
4954 : :
4955 : : /* operator new (size_t, align_val_t); */
4956 : 71807 : newtype = build_function_type_list (ptr_type_node, size_type_node,
4957 : : align_type_node, NULL_TREE);
4958 : 71807 : newtype = cp_build_type_attribute_variant (newtype, newattrs);
4959 : 71807 : newtype = build_exception_variant (newtype, new_eh_spec);
4960 : 71807 : cxx_build_operator_new (newtype);
4961 : :
4962 : : /* operator delete (void *, align_val_t); */
4963 : 71807 : deltype = build_function_type_list (void_type_node, ptr_type_node,
4964 : : align_type_node, NULL_TREE);
4965 : 71807 : deltype = cp_build_type_attribute_variant (deltype, extvisattr);
4966 : 71807 : deltype = build_exception_variant (deltype, empty_except_spec);
4967 : 71807 : cxx_build_operator_delete (deltype);
4968 : :
4969 : 71807 : if (flag_sized_deallocation)
4970 : : {
4971 : : /* operator delete (void *, size_t, align_val_t); */
4972 : 71802 : deltype = build_function_type_list (void_type_node, ptr_type_node,
4973 : : size_type_node, align_type_node,
4974 : : NULL_TREE);
4975 : 71802 : deltype = cp_build_type_attribute_variant (deltype, extvisattr);
4976 : 71802 : deltype = build_exception_variant (deltype, empty_except_spec);
4977 : 71802 : cxx_build_operator_delete (deltype);
4978 : : }
4979 : : }
4980 : 92024 : }
4981 : :
4982 : : /* Create the predefined scalar types of C,
4983 : : and some nodes representing standard constants (0, 1, (void *)0).
4984 : : Initialize the global binding level.
4985 : : Make definitions for built-in primitive functions. */
4986 : :
4987 : : void
4988 : 92024 : cxx_init_decl_processing (void)
4989 : : {
4990 : 92024 : tree void_ftype;
4991 : :
4992 : : /* Create all the identifiers we need. */
4993 : 92024 : initialize_predefined_identifiers ();
4994 : :
4995 : : /* Create the global variables. */
4996 : 92024 : push_to_top_level ();
4997 : :
4998 : 92024 : current_function_decl = NULL_TREE;
4999 : 92024 : current_binding_level = NULL;
5000 : : /* Enter the global namespace. */
5001 : 92024 : gcc_assert (global_namespace == NULL_TREE);
5002 : 92024 : global_namespace = build_lang_decl (NAMESPACE_DECL, global_identifier,
5003 : : void_type_node);
5004 : 92024 : TREE_PUBLIC (global_namespace) = true;
5005 : 92024 : DECL_MODULE_EXPORT_P (global_namespace) = true;
5006 : 92024 : DECL_CONTEXT (global_namespace)
5007 : 92024 : = build_translation_unit_decl (get_identifier (main_input_filename));
5008 : : /* Remember whether we want the empty class passing ABI change warning
5009 : : in this TU. */
5010 : 92024 : TRANSLATION_UNIT_WARN_EMPTY_P (DECL_CONTEXT (global_namespace))
5011 : 93081 : = warn_abi && abi_version_crosses (12);
5012 : 92024 : debug_hooks->register_main_translation_unit
5013 : 92024 : (DECL_CONTEXT (global_namespace));
5014 : 92024 : begin_scope (sk_namespace, global_namespace);
5015 : 92024 : current_namespace = global_namespace;
5016 : :
5017 : 92024 : if (flag_visibility_ms_compat)
5018 : 6 : default_visibility = VISIBILITY_HIDDEN;
5019 : :
5020 : : /* Initially, C. */
5021 : 92024 : current_lang_name = lang_name_c;
5022 : :
5023 : : /* Create the `std' namespace. */
5024 : 92024 : push_namespace (get_identifier ("std"));
5025 : 92024 : std_node = current_namespace;
5026 : 92024 : pop_namespace ();
5027 : :
5028 : 92024 : flag_noexcept_type = (cxx_dialect >= cxx17);
5029 : :
5030 : 92024 : c_common_nodes_and_builtins ();
5031 : :
5032 : 92024 : tree bool_ftype = build_function_type_list (boolean_type_node, NULL_TREE);
5033 : 92024 : tree decl
5034 : 92024 : = add_builtin_function ("__builtin_is_constant_evaluated",
5035 : : bool_ftype, CP_BUILT_IN_IS_CONSTANT_EVALUATED,
5036 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5037 : 92024 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5038 : :
5039 : : /* The concrete return type of __builtin_source_location is
5040 : : const std::source_location::__impl*, but we can't form the type
5041 : : at this point. So we initially declare it with an auto return
5042 : : type which we then "deduce" from require_deduced_type upon first use. */
5043 : 92024 : tree auto_ftype = build_function_type_list (make_auto (), NULL_TREE);
5044 : 92024 : decl = add_builtin_function ("__builtin_source_location",
5045 : : auto_ftype, CP_BUILT_IN_SOURCE_LOCATION,
5046 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5047 : 92024 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5048 : :
5049 : 92024 : tree bool_vaftype = build_varargs_function_type_list (boolean_type_node,
5050 : : NULL_TREE);
5051 : 92024 : decl
5052 : 92024 : = add_builtin_function ("__builtin_is_corresponding_member",
5053 : : bool_vaftype,
5054 : : CP_BUILT_IN_IS_CORRESPONDING_MEMBER,
5055 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5056 : 92024 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5057 : :
5058 : 92024 : decl
5059 : 92024 : = add_builtin_function ("__builtin_is_pointer_interconvertible_with_class",
5060 : : bool_vaftype,
5061 : : CP_BUILT_IN_IS_POINTER_INTERCONVERTIBLE_WITH_CLASS,
5062 : : BUILT_IN_FRONTEND, NULL, NULL_TREE);
5063 : 92024 : set_call_expr_flags (decl, ECF_CONST | ECF_NOTHROW | ECF_LEAF);
5064 : :
5065 : 92024 : integer_two_node = build_int_cst (NULL_TREE, 2);
5066 : :
5067 : : /* Guess at the initial static decls size. */
5068 : 92024 : vec_alloc (static_decls, 500);
5069 : :
5070 : : /* ... and keyed classes. */
5071 : 92024 : vec_alloc (keyed_classes, 100);
5072 : :
5073 : 92024 : record_builtin_type (RID_BOOL, "bool", boolean_type_node);
5074 : 92024 : truthvalue_type_node = boolean_type_node;
5075 : 92024 : truthvalue_false_node = boolean_false_node;
5076 : 92024 : truthvalue_true_node = boolean_true_node;
5077 : :
5078 : 92024 : empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
5079 : 92024 : noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
5080 : 92024 : noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
5081 : 92024 : noexcept_deferred_spec = build_tree_list (make_node (DEFERRED_NOEXCEPT),
5082 : : NULL_TREE);
5083 : :
5084 : : #if 0
5085 : : record_builtin_type (RID_MAX, NULL, string_type_node);
5086 : : #endif
5087 : :
5088 : 92024 : delta_type_node = ptrdiff_type_node;
5089 : 92024 : vtable_index_type = ptrdiff_type_node;
5090 : :
5091 : 92024 : vtt_parm_type = build_pointer_type (const_ptr_type_node);
5092 : 92024 : void_ftype = build_function_type_list (void_type_node, NULL_TREE);
5093 : :
5094 : : /* Create the conversion operator marker. This operator's DECL_NAME
5095 : : is in the identifier table, so we can use identifier equality to
5096 : : find it. */
5097 : 92024 : conv_op_marker = build_lang_decl (FUNCTION_DECL, conv_op_identifier,
5098 : : void_ftype);
5099 : :
5100 : : /* C++ extensions */
5101 : :
5102 : 92024 : unknown_type_node = make_node (LANG_TYPE);
5103 : 92024 : record_unknown_type (unknown_type_node, "unknown type");
5104 : :
5105 : : /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
5106 : 92024 : TREE_TYPE (unknown_type_node) = unknown_type_node;
5107 : :
5108 : : /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
5109 : : result. */
5110 : 92024 : TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
5111 : 92024 : TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
5112 : :
5113 : 92024 : init_list_type_node = make_node (LANG_TYPE);
5114 : 92024 : record_unknown_type (init_list_type_node, "init list");
5115 : :
5116 : : /* Used when parsing to distinguish parameter-lists () and (void). */
5117 : 92024 : explicit_void_list_node = build_tree_list (NULL_TREE, void_type_node);
5118 : :
5119 : 92024 : {
5120 : : /* Make sure we get a unique function type, so we can give
5121 : : its pointer type a name. (This wins for gdb.) */
5122 : 92024 : tree vfunc_type = make_node (FUNCTION_TYPE);
5123 : 92024 : TREE_TYPE (vfunc_type) = integer_type_node;
5124 : 92024 : TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
5125 : 92024 : layout_type (vfunc_type);
5126 : :
5127 : 92024 : vtable_entry_type = build_pointer_type (vfunc_type);
5128 : : }
5129 : 92024 : record_builtin_type (RID_MAX, "__vtbl_ptr_type", vtable_entry_type);
5130 : :
5131 : 92024 : vtbl_type_node
5132 : 92024 : = build_cplus_array_type (vtable_entry_type, NULL_TREE);
5133 : 92024 : layout_type (vtbl_type_node);
5134 : 92024 : vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
5135 : 92024 : record_builtin_type (RID_MAX, NULL, vtbl_type_node);
5136 : 92024 : vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
5137 : 92024 : layout_type (vtbl_ptr_type_node);
5138 : 92024 : record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
5139 : :
5140 : 92024 : push_namespace (get_identifier ("__cxxabiv1"));
5141 : 92024 : abi_node = current_namespace;
5142 : 92024 : pop_namespace ();
5143 : :
5144 : 92024 : any_targ_node = make_node (LANG_TYPE);
5145 : 92024 : record_unknown_type (any_targ_node, "any type");
5146 : :
5147 : : /* Now, C++. */
5148 : 92024 : current_lang_name = lang_name_cplusplus;
5149 : :
5150 : 92024 : if (aligned_new_threshold > 1
5151 : 92024 : && !pow2p_hwi (aligned_new_threshold))
5152 : : {
5153 : 0 : error ("%<-faligned-new=%d%> is not a power of two",
5154 : : aligned_new_threshold);
5155 : 0 : aligned_new_threshold = 1;
5156 : : }
5157 : 92024 : if (aligned_new_threshold == -1)
5158 : 112227 : aligned_new_threshold = (cxx_dialect >= cxx17) ? 1 : 0;
5159 : 92024 : if (aligned_new_threshold == 1)
5160 : 71804 : aligned_new_threshold = malloc_alignment () / BITS_PER_UNIT;
5161 : :
5162 : : /* Ensure attribs.cc is initialized. */
5163 : 92024 : init_attributes ();
5164 : 92024 : cxx_init_operator_new_delete_decls ();
5165 : :
5166 : : /* C++-specific nullptr initialization. */
5167 : 92024 : if (abi_version_at_least (9))
5168 : 91853 : SET_TYPE_ALIGN (nullptr_type_node, GET_MODE_ALIGNMENT (ptr_mode));
5169 : 92024 : record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
5170 : :
5171 : 92024 : if (! supports_one_only ())
5172 : 0 : flag_weak = 0;
5173 : :
5174 : 92024 : abort_fndecl
5175 : 92024 : = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype,
5176 : : ECF_NORETURN | ECF_NOTHROW | ECF_COLD);
5177 : 92024 : if (flag_weak)
5178 : : /* If no definition is available, resolve references to NULL. */
5179 : 91994 : declare_weak (abort_fndecl);
5180 : :
5181 : : /* Perform other language dependent initializations. */
5182 : 92024 : init_class_processing ();
5183 : 92024 : init_rtti_processing ();
5184 : 92024 : init_template_processing ();
5185 : :
5186 : 92024 : if (flag_exceptions)
5187 : 90948 : init_exception_processing ();
5188 : :
5189 : 92024 : if (flag_contracts)
5190 : 143 : init_terminate_fn ();
5191 : :
5192 : 92024 : if (modules_p ())
5193 : 3881 : init_modules (parse_in);
5194 : :
5195 : 92024 : make_fname_decl = cp_make_fname_decl;
5196 : 92024 : start_fname_decls ();
5197 : :
5198 : : /* Show we use EH for cleanups. */
5199 : 92024 : if (flag_exceptions)
5200 : 90948 : using_eh_for_cleanups ();
5201 : :
5202 : : /* Check that the hardware interference sizes are at least
5203 : : alignof(max_align_t), as required by the standard. */
5204 : 92024 : const int max_align = max_align_t_align () / BITS_PER_UNIT;
5205 : 92024 : if (OPTION_SET_P (param_destruct_interfere_size))
5206 : : {
5207 : 0 : if (param_destruct_interfere_size < max_align)
5208 : 0 : error ("%<--param destructive-interference-size=%d%> is less than "
5209 : : "%d", param_destruct_interfere_size, max_align);
5210 : 0 : else if (param_destruct_interfere_size < param_l1_cache_line_size)
5211 : 0 : warning (OPT_Winterference_size,
5212 : : "%<--param destructive-interference-size=%d%> "
5213 : : "is less than %<--param l1-cache-line-size=%d%>",
5214 : : param_destruct_interfere_size, param_l1_cache_line_size);
5215 : : }
5216 : 92024 : else if (param_destruct_interfere_size)
5217 : : /* Assume the internal value is OK. */;
5218 : 0 : else if (param_l1_cache_line_size >= max_align)
5219 : 0 : param_destruct_interfere_size = param_l1_cache_line_size;
5220 : : /* else leave it unset. */
5221 : :
5222 : 92024 : if (OPTION_SET_P (param_construct_interfere_size))
5223 : : {
5224 : 0 : if (param_construct_interfere_size < max_align)
5225 : 0 : error ("%<--param constructive-interference-size=%d%> is less than "
5226 : : "%d", param_construct_interfere_size, max_align);
5227 : 0 : else if (param_construct_interfere_size > param_l1_cache_line_size
5228 : 0 : && param_l1_cache_line_size >= max_align)
5229 : 0 : warning (OPT_Winterference_size,
5230 : : "%<--param constructive-interference-size=%d%> "
5231 : : "is greater than %<--param l1-cache-line-size=%d%>",
5232 : : param_construct_interfere_size, param_l1_cache_line_size);
5233 : : }
5234 : 92024 : else if (param_construct_interfere_size)
5235 : : /* Assume the internal value is OK. */;
5236 : 0 : else if (param_l1_cache_line_size >= max_align)
5237 : 0 : param_construct_interfere_size = param_l1_cache_line_size;
5238 : 92024 : }
5239 : :
5240 : : /* Enter an abi node in global-module context. returns a cookie to
5241 : : give to pop_abi_namespace. */
5242 : :
5243 : : unsigned
5244 : 57573 : push_abi_namespace (tree node)
5245 : : {
5246 : 57573 : push_nested_namespace (node);
5247 : 57573 : push_visibility ("default", 2);
5248 : 57573 : unsigned flags = module_kind;
5249 : 57573 : module_kind = 0;
5250 : 57573 : return flags;
5251 : : }
5252 : :
5253 : : /* Pop an abi namespace, FLAGS is the cookie push_abi_namespace gave
5254 : : you. */
5255 : :
5256 : : void
5257 : 57573 : pop_abi_namespace (unsigned flags, tree node)
5258 : : {
5259 : 57573 : module_kind = flags;
5260 : 57573 : pop_visibility (2);
5261 : 57573 : pop_nested_namespace (node);
5262 : 57573 : }
5263 : :
5264 : : /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
5265 : : the decl, LOC is the location to give the decl, NAME is the
5266 : : initialization string and TYPE_DEP indicates whether NAME depended
5267 : : on the type of the function. We make use of that to detect
5268 : : __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
5269 : : at the point of first use, so we mustn't push the decl now. */
5270 : :
5271 : : static tree
5272 : 106920 : cp_make_fname_decl (location_t loc, tree id, int type_dep)
5273 : : {
5274 : 106920 : tree domain = NULL_TREE;
5275 : 106920 : tree init = NULL_TREE;
5276 : :
5277 : 106920 : if (!(type_dep && current_function_decl && in_template_context))
5278 : : {
5279 : 29485 : const char *name = NULL;
5280 : 29485 : bool release_name = false;
5281 : :
5282 : 29485 : if (current_function_decl == NULL_TREE)
5283 : : name = "top level";
5284 : 29471 : else if (type_dep == 0)
5285 : : {
5286 : : /* __FUNCTION__ */
5287 : 576 : name = fname_as_string (type_dep);
5288 : 576 : release_name = true;
5289 : : }
5290 : : else
5291 : : {
5292 : : /* __PRETTY_FUNCTION__ */
5293 : 28895 : gcc_checking_assert (type_dep == 1);
5294 : 28895 : name = cxx_printable_name (current_function_decl, 2);
5295 : : }
5296 : :
5297 : 29485 : size_t length = strlen (name);
5298 : 29485 : domain = build_index_type (size_int (length));
5299 : 29485 : init = build_string (length + 1, name);
5300 : 29485 : if (release_name)
5301 : 576 : free (const_cast<char *> (name));
5302 : : }
5303 : :
5304 : 106920 : tree type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
5305 : 106920 : type = build_cplus_array_type (type, domain);
5306 : :
5307 : 106920 : if (init)
5308 : 29485 : TREE_TYPE (init) = type;
5309 : : else
5310 : 77435 : init = error_mark_node;
5311 : :
5312 : 106920 : tree decl = build_decl (loc, VAR_DECL, id, type);
5313 : :
5314 : 106920 : TREE_READONLY (decl) = 1;
5315 : 106920 : DECL_ARTIFICIAL (decl) = 1;
5316 : 106920 : DECL_DECLARED_CONSTEXPR_P (decl) = 1;
5317 : 106920 : TREE_STATIC (decl) = 1;
5318 : :
5319 : 106920 : TREE_USED (decl) = 1;
5320 : :
5321 : 106920 : SET_DECL_VALUE_EXPR (decl, init);
5322 : 106920 : DECL_HAS_VALUE_EXPR_P (decl) = 1;
5323 : : /* For decl_constant_var_p. */
5324 : 106920 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5325 : :
5326 : 106920 : if (current_function_decl)
5327 : : {
5328 : 106906 : DECL_CONTEXT (decl) = current_function_decl;
5329 : 106906 : decl = pushdecl_outermost_localscope (decl);
5330 : 106906 : if (decl != error_mark_node)
5331 : 106903 : add_decl_expr (decl);
5332 : : }
5333 : : else
5334 : : {
5335 : 14 : DECL_THIS_STATIC (decl) = true;
5336 : 14 : decl = pushdecl_top_level_and_finish (decl, NULL_TREE);
5337 : : }
5338 : :
5339 : 106920 : return decl;
5340 : : }
5341 : :
5342 : : /* Install DECL as a builtin function at current global scope. Return
5343 : : the new decl (if we found an existing version). Also installs it
5344 : : into ::std, if it's not '_*'. */
5345 : :
5346 : : tree
5347 : 205715066 : cxx_builtin_function (tree decl)
5348 : : {
5349 : 205715066 : retrofit_lang_decl (decl);
5350 : :
5351 : 205715066 : DECL_ARTIFICIAL (decl) = 1;
5352 : 205715066 : SET_DECL_LANGUAGE (decl, lang_c);
5353 : : /* Runtime library routines are, by definition, available in an
5354 : : external shared object. */
5355 : 205715066 : DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
5356 : 205715066 : DECL_VISIBILITY_SPECIFIED (decl) = 1;
5357 : :
5358 : 205715066 : tree id = DECL_NAME (decl);
5359 : 205715066 : const char *name = IDENTIFIER_POINTER (id);
5360 : 205715066 : bool hiding = false;
5361 : 205715066 : if (name[0] != '_' || name[1] != '_')
5362 : : /* In the user's namespace, it must be declared before use. */
5363 : : hiding = true;
5364 : 172362244 : else if (IDENTIFIER_LENGTH (id) > strlen ("___chk")
5365 : 172362244 : && !startswith (name + 2, "builtin_")
5366 : 193774413 : && 0 == memcmp (name + IDENTIFIER_LENGTH (id) - strlen ("_chk"),
5367 : : "_chk", strlen ("_chk") + 1))
5368 : : /* Treat __*_chk fortification functions as anticipated as well,
5369 : : unless they are __builtin_*_chk. */
5370 : : hiding = true;
5371 : :
5372 : : /* All builtins that don't begin with an '_' should additionally
5373 : : go in the 'std' namespace. */
5374 : 205715066 : if (name[0] != '_')
5375 : : {
5376 : 33227051 : tree std_decl = copy_decl (decl);
5377 : :
5378 : 33227051 : push_nested_namespace (std_node);
5379 : 33227051 : DECL_CONTEXT (std_decl) = FROB_CONTEXT (std_node);
5380 : 33227051 : pushdecl (std_decl, hiding);
5381 : 33227051 : pop_nested_namespace (std_node);
5382 : : }
5383 : :
5384 : 205715066 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5385 : 205715066 : decl = pushdecl (decl, hiding);
5386 : :
5387 : 205715066 : return decl;
5388 : : }
5389 : :
5390 : : /* Like cxx_builtin_function, but guarantee the function is added to the global
5391 : : scope. This is to allow function specific options to add new machine
5392 : : dependent builtins when the target ISA changes via attribute((target(...)))
5393 : : which saves space on program startup if the program does not use non-generic
5394 : : ISAs. */
5395 : :
5396 : : tree
5397 : 665095 : cxx_builtin_function_ext_scope (tree decl)
5398 : : {
5399 : 665095 : push_nested_namespace (global_namespace);
5400 : 665095 : decl = cxx_builtin_function (decl);
5401 : 665095 : pop_nested_namespace (global_namespace);
5402 : :
5403 : 665095 : return decl;
5404 : : }
5405 : :
5406 : : /* Implement LANG_HOOKS_SIMULATE_BUILTIN_FUNCTION_DECL. */
5407 : :
5408 : : tree
5409 : 0 : cxx_simulate_builtin_function_decl (tree decl)
5410 : : {
5411 : 0 : retrofit_lang_decl (decl);
5412 : :
5413 : 0 : DECL_ARTIFICIAL (decl) = 1;
5414 : 0 : SET_DECL_LANGUAGE (decl, lang_cplusplus);
5415 : 0 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5416 : 0 : return pushdecl (decl);
5417 : : }
5418 : :
5419 : : /* Generate a FUNCTION_DECL with the typical flags for a runtime library
5420 : : function. Not called directly. */
5421 : :
5422 : : static tree
5423 : 1480514 : build_library_fn (tree name, enum tree_code operator_code, tree type,
5424 : : int ecf_flags)
5425 : : {
5426 : 1480514 : tree fn = build_lang_decl (FUNCTION_DECL, name, type);
5427 : 1480514 : DECL_EXTERNAL (fn) = 1;
5428 : 1480514 : TREE_PUBLIC (fn) = 1;
5429 : 1480514 : DECL_ARTIFICIAL (fn) = 1;
5430 : 1480514 : DECL_OVERLOADED_OPERATOR_CODE_RAW (fn)
5431 : 1480514 : = OVL_OP_INFO (false, operator_code)->ovl_op_code;
5432 : 1480514 : SET_DECL_LANGUAGE (fn, lang_c);
5433 : : /* Runtime library routines are, by definition, available in an
5434 : : external shared object. */
5435 : 1480514 : DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
5436 : 1480514 : DECL_VISIBILITY_SPECIFIED (fn) = 1;
5437 : 1480514 : set_call_expr_flags (fn, ecf_flags);
5438 : 1480514 : return fn;
5439 : : }
5440 : :
5441 : : /* Returns the _DECL for a library function with C++ linkage. */
5442 : :
5443 : : static tree
5444 : 1035938 : build_cp_library_fn (tree name, enum tree_code operator_code, tree type,
5445 : : int ecf_flags)
5446 : : {
5447 : 1035938 : tree fn = build_library_fn (name, operator_code, type, ecf_flags);
5448 : 1035938 : DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
5449 : 1035938 : SET_DECL_LANGUAGE (fn, lang_cplusplus);
5450 : 1035938 : return fn;
5451 : : }
5452 : :
5453 : : /* Like build_library_fn, but takes a C string instead of an
5454 : : IDENTIFIER_NODE. */
5455 : :
5456 : : tree
5457 : 97735 : build_library_fn_ptr (const char* name, tree type, int ecf_flags)
5458 : : {
5459 : 97735 : return build_library_fn (get_identifier (name), ERROR_MARK, type, ecf_flags);
5460 : : }
5461 : :
5462 : : /* Like build_cp_library_fn, but takes a C string instead of an
5463 : : IDENTIFIER_NODE. */
5464 : :
5465 : : tree
5466 : 91032 : build_cp_library_fn_ptr (const char* name, tree type, int ecf_flags)
5467 : : {
5468 : 91032 : return build_cp_library_fn (get_identifier (name), ERROR_MARK, type,
5469 : 91032 : ecf_flags);
5470 : : }
5471 : :
5472 : : /* Like build_library_fn, but also pushes the function so that we will
5473 : : be able to find it via get_global_binding. Also, the function
5474 : : may throw exceptions listed in RAISES. */
5475 : :
5476 : : tree
5477 : 346841 : push_library_fn (tree name, tree type, tree raises, int ecf_flags)
5478 : : {
5479 : 346841 : if (raises)
5480 : 38936 : type = build_exception_variant (type, raises);
5481 : :
5482 : 346841 : tree fn = build_library_fn (name, ERROR_MARK, type, ecf_flags);
5483 : 346841 : return pushdecl_top_level (fn);
5484 : : }
5485 : :
5486 : : /* Like build_cp_library_fn, but also pushes the function so that it
5487 : : will be found by normal lookup. */
5488 : :
5489 : : static tree
5490 : 944906 : push_cp_library_fn (enum tree_code operator_code, tree type,
5491 : : int ecf_flags)
5492 : : {
5493 : 944906 : tree fn = build_cp_library_fn (ovl_op_identifier (false, operator_code),
5494 : : operator_code, type, ecf_flags);
5495 : 944906 : pushdecl (fn);
5496 : 944906 : if (flag_tm)
5497 : 3004 : apply_tm_attr (fn, get_identifier ("transaction_safe"));
5498 : 944906 : return fn;
5499 : : }
5500 : :
5501 : : /* Like push_library_fn, but also note that this function throws
5502 : : and does not return. Used for __throw_foo and the like. */
5503 : :
5504 : : tree
5505 : 101663 : push_throw_library_fn (tree name, tree type)
5506 : : {
5507 : 101663 : tree fn = push_library_fn (name, type, NULL_TREE,
5508 : : ECF_NORETURN | ECF_XTHROW | ECF_COLD);
5509 : 101663 : return fn;
5510 : : }
5511 : :
5512 : : /* When we call finish_struct for an anonymous union, we create
5513 : : default copy constructors and such. But, an anonymous union
5514 : : shouldn't have such things; this function undoes the damage to the
5515 : : anonymous union type T.
5516 : :
5517 : : (The reason that we create the synthesized methods is that we don't
5518 : : distinguish `union { int i; }' from `typedef union { int i; } U'.
5519 : : The first is an anonymous union; the second is just an ordinary
5520 : : union type.) */
5521 : :
5522 : : void
5523 : 89173 : fixup_anonymous_aggr (tree t)
5524 : : {
5525 : : /* Wipe out memory of synthesized methods. */
5526 : 89173 : TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
5527 : 89173 : TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
5528 : 89173 : TYPE_HAS_COPY_CTOR (t) = 0;
5529 : 89173 : TYPE_HAS_CONST_COPY_CTOR (t) = 0;
5530 : 89173 : TYPE_HAS_COPY_ASSIGN (t) = 0;
5531 : 89173 : TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
5532 : :
5533 : : /* Splice the implicitly generated functions out of TYPE_FIELDS and diagnose
5534 : : invalid members. */
5535 : 465985 : for (tree probe, *prev_p = &TYPE_FIELDS (t); (probe = *prev_p);)
5536 : : {
5537 : 376812 : if (TREE_CODE (probe) == FUNCTION_DECL && DECL_ARTIFICIAL (probe))
5538 : 0 : *prev_p = DECL_CHAIN (probe);
5539 : : else
5540 : 376812 : prev_p = &DECL_CHAIN (probe);
5541 : :
5542 : 376812 : if (DECL_ARTIFICIAL (probe)
5543 : 376812 : && (!DECL_IMPLICIT_TYPEDEF_P (probe)
5544 : 41080 : || TYPE_ANON_P (TREE_TYPE (probe))))
5545 : 133315 : continue;
5546 : :
5547 : 243497 : if (TREE_CODE (probe) != FIELD_DECL
5548 : 243497 : || (TREE_PRIVATE (probe) || TREE_PROTECTED (probe)))
5549 : : {
5550 : : /* We already complained about static data members in
5551 : : finish_static_data_member_decl. */
5552 : 66 : if (!VAR_P (probe))
5553 : : {
5554 : 51 : auto_diagnostic_group d;
5555 : 51 : if (permerror (DECL_SOURCE_LOCATION (probe),
5556 : 51 : TREE_CODE (t) == UNION_TYPE
5557 : : ? "%q#D invalid; an anonymous union may "
5558 : : "only have public non-static data members"
5559 : : : "%q#D invalid; an anonymous struct may "
5560 : : "only have public non-static data members", probe))
5561 : : {
5562 : 51 : static bool hint;
5563 : 51 : if (flag_permissive && !hint)
5564 : : {
5565 : 6 : hint = true;
5566 : 6 : inform (DECL_SOURCE_LOCATION (probe),
5567 : : "this flexibility is deprecated and will be "
5568 : : "removed");
5569 : : }
5570 : : }
5571 : 51 : }
5572 : : }
5573 : : }
5574 : :
5575 : : /* Splice all functions out of CLASSTYPE_MEMBER_VEC. */
5576 : 89173 : vec<tree,va_gc>* vec = CLASSTYPE_MEMBER_VEC (t);
5577 : 89173 : unsigned store = 0;
5578 : 198733 : for (tree elt : vec)
5579 : 109560 : if (!is_overloaded_fn (elt))
5580 : 109539 : (*vec)[store++] = elt;
5581 : 89173 : vec_safe_truncate (vec, store);
5582 : :
5583 : : /* Wipe RTTI info. */
5584 : 89173 : CLASSTYPE_TYPEINFO_VAR (t) = NULL_TREE;
5585 : :
5586 : : /* Anonymous aggregates cannot have fields with ctors, dtors or complex
5587 : : assignment operators (because they cannot have these methods themselves).
5588 : : For anonymous unions this is already checked because they are not allowed
5589 : : in any union, otherwise we have to check it. */
5590 : 89173 : if (TREE_CODE (t) != UNION_TYPE)
5591 : : {
5592 : 19409 : tree field, type;
5593 : :
5594 : 19409 : if (BINFO_N_BASE_BINFOS (TYPE_BINFO (t)))
5595 : : {
5596 : 9 : error_at (location_of (t), "anonymous struct with base classes");
5597 : : /* Avoid ICE after error on anon-struct9.C. */
5598 : 9 : TYPE_NEEDS_CONSTRUCTING (t) = false;
5599 : : }
5600 : :
5601 : 87775 : for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
5602 : 68366 : if (TREE_CODE (field) == FIELD_DECL)
5603 : : {
5604 : 48856 : type = TREE_TYPE (field);
5605 : 48856 : if (CLASS_TYPE_P (type))
5606 : : {
5607 : 61 : if (TYPE_NEEDS_CONSTRUCTING (type))
5608 : 6 : error ("member %q+#D with constructor not allowed "
5609 : : "in anonymous aggregate", field);
5610 : 61 : if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
5611 : 0 : error ("member %q+#D with destructor not allowed "
5612 : : "in anonymous aggregate", field);
5613 : 61 : if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
5614 : 0 : error ("member %q+#D with copy assignment operator "
5615 : : "not allowed in anonymous aggregate", field);
5616 : : }
5617 : : }
5618 : : }
5619 : 89173 : }
5620 : :
5621 : : /* Warn for an attribute located at LOCATION that appertains to the
5622 : : class type CLASS_TYPE that has not been properly placed after its
5623 : : class-key, in it class-specifier. */
5624 : :
5625 : : void
5626 : 84 : warn_misplaced_attr_for_class_type (location_t location,
5627 : : tree class_type)
5628 : : {
5629 : 84 : gcc_assert (OVERLOAD_TYPE_P (class_type));
5630 : :
5631 : 84 : auto_diagnostic_group d;
5632 : 84 : if (warning_at (location, OPT_Wattributes,
5633 : : "attribute ignored in declaration "
5634 : : "of %q#T", class_type))
5635 : 84 : inform (location,
5636 : : "attribute for %q#T must follow the %qs keyword",
5637 : : class_type, class_key_or_enum_as_string (class_type));
5638 : 84 : }
5639 : :
5640 : : /* Returns the cv-qualifiers that apply to the type specified
5641 : : by the DECLSPECS. */
5642 : :
5643 : : static int
5644 : 864907961 : get_type_quals (const cp_decl_specifier_seq *declspecs)
5645 : : {
5646 : 864907961 : int type_quals = TYPE_UNQUALIFIED;
5647 : :
5648 : 864907961 : if (decl_spec_seq_has_spec_p (declspecs, ds_const))
5649 : 95473952 : type_quals |= TYPE_QUAL_CONST;
5650 : 864907961 : if (decl_spec_seq_has_spec_p (declspecs, ds_volatile))
5651 : 1509823 : type_quals |= TYPE_QUAL_VOLATILE;
5652 : 864907961 : if (decl_spec_seq_has_spec_p (declspecs, ds_restrict))
5653 : 34 : type_quals |= TYPE_QUAL_RESTRICT;
5654 : :
5655 : 864907961 : return type_quals;
5656 : : }
5657 : :
5658 : : /* Make sure that a declaration with no declarator is well-formed, i.e.
5659 : : just declares a tagged type or anonymous union.
5660 : :
5661 : : Returns the type declared; or NULL_TREE if none. */
5662 : :
5663 : : tree
5664 : 30681272 : check_tag_decl (cp_decl_specifier_seq *declspecs,
5665 : : bool explicit_type_instantiation_p)
5666 : : {
5667 : 30681272 : int saw_friend = decl_spec_seq_has_spec_p (declspecs, ds_friend);
5668 : 30681272 : int saw_typedef = decl_spec_seq_has_spec_p (declspecs, ds_typedef);
5669 : : /* If a class, struct, or enum type is declared by the DECLSPECS
5670 : : (i.e, if a class-specifier, enum-specifier, or non-typename
5671 : : elaborated-type-specifier appears in the DECLSPECS),
5672 : : DECLARED_TYPE is set to the corresponding type. */
5673 : 30681272 : tree declared_type = NULL_TREE;
5674 : 30681272 : bool error_p = false;
5675 : :
5676 : 30681272 : if (declspecs->multiple_types_p)
5677 : 26 : error_at (smallest_type_location (declspecs),
5678 : : "multiple types in one declaration");
5679 : 30681246 : else if (declspecs->redefined_builtin_type)
5680 : : {
5681 : 21 : location_t loc = declspecs->locations[ds_redefined_builtin_type_spec];
5682 : 21 : if (!in_system_header_at (loc))
5683 : 9 : permerror (loc, "redeclaration of C++ built-in type %qT",
5684 : : declspecs->redefined_builtin_type);
5685 : 21 : return NULL_TREE;
5686 : : }
5687 : :
5688 : 30681251 : if (declspecs->type
5689 : 30681236 : && TYPE_P (declspecs->type)
5690 : 61189822 : && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
5691 : 30507317 : && MAYBE_CLASS_TYPE_P (declspecs->type))
5692 : 1569641 : || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
5693 : : declared_type = declspecs->type;
5694 : 173976 : else if (declspecs->type == error_mark_node)
5695 : 1462 : error_p = true;
5696 : :
5697 : 30681251 : if (type_uses_auto (declared_type))
5698 : : {
5699 : 8 : error_at (declspecs->locations[ds_type_spec],
5700 : : "%<auto%> can only be specified for variables "
5701 : : "or function declarations");
5702 : 8 : return error_mark_node;
5703 : : }
5704 : :
5705 : 30681243 : if (declared_type && !OVERLOAD_TYPE_P (declared_type))
5706 : : declared_type = NULL_TREE;
5707 : :
5708 : 30681243 : if (!declared_type && !saw_friend && !error_p)
5709 : 88 : permerror (input_location, "declaration does not declare anything");
5710 : : /* Check for an anonymous union. */
5711 : 30507240 : else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
5712 : 88648124 : && TYPE_UNNAMED_P (declared_type))
5713 : : {
5714 : : /* 7/3 In a simple-declaration, the optional init-declarator-list
5715 : : can be omitted only when declaring a class (clause 9) or
5716 : : enumeration (7.2), that is, when the decl-specifier-seq contains
5717 : : either a class-specifier, an elaborated-type-specifier with
5718 : : a class-key (9.1), or an enum-specifier. In these cases and
5719 : : whenever a class-specifier or enum-specifier is present in the
5720 : : decl-specifier-seq, the identifiers in these specifiers are among
5721 : : the names being declared by the declaration (as class-name,
5722 : : enum-names, or enumerators, depending on the syntax). In such
5723 : : cases, and except for the declaration of an unnamed bit-field (9.6),
5724 : : the decl-specifier-seq shall introduce one or more names into the
5725 : : program, or shall redeclare a name introduced by a previous
5726 : : declaration. [Example:
5727 : : enum { }; // ill-formed
5728 : : typedef class { }; // ill-formed
5729 : : --end example] */
5730 : 89179 : if (saw_typedef)
5731 : : {
5732 : 6 : error_at (declspecs->locations[ds_typedef],
5733 : : "missing type-name in typedef-declaration");
5734 : 6 : return NULL_TREE;
5735 : : }
5736 : 89173 : /* Anonymous unions are objects, so they can have specifiers. */;
5737 : 89173 : SET_ANON_AGGR_TYPE_P (declared_type);
5738 : :
5739 : 89173 : if (TREE_CODE (declared_type) != UNION_TYPE)
5740 : 19409 : pedwarn (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (declared_type)),
5741 : : OPT_Wpedantic, "ISO C++ prohibits anonymous structs");
5742 : : }
5743 : :
5744 : : else
5745 : : {
5746 : 30591976 : if (decl_spec_seq_has_spec_p (declspecs, ds_inline))
5747 : 9 : error_at (declspecs->locations[ds_inline],
5748 : : "%<inline%> can only be specified for functions");
5749 : 30591967 : else if (decl_spec_seq_has_spec_p (declspecs, ds_virtual))
5750 : 3 : error_at (declspecs->locations[ds_virtual],
5751 : : "%<virtual%> can only be specified for functions");
5752 : 30591964 : else if (saw_friend
5753 : 30591964 : && (!current_class_type
5754 : 1563021 : || current_scope () != current_class_type))
5755 : 0 : error_at (declspecs->locations[ds_friend],
5756 : : "%<friend%> can only be specified inside a class");
5757 : 30591964 : else if (decl_spec_seq_has_spec_p (declspecs, ds_explicit))
5758 : 3 : error_at (declspecs->locations[ds_explicit],
5759 : : "%<explicit%> can only be specified for constructors");
5760 : 30591961 : else if (declspecs->storage_class)
5761 : 3 : error_at (declspecs->locations[ds_storage_class],
5762 : : "a storage class can only be specified for objects "
5763 : : "and functions");
5764 : 30591958 : else if (decl_spec_seq_has_spec_p (declspecs, ds_const))
5765 : 9 : error_at (declspecs->locations[ds_const],
5766 : : "%<const%> can only be specified for objects and "
5767 : : "functions");
5768 : 30591949 : else if (decl_spec_seq_has_spec_p (declspecs, ds_volatile))
5769 : 3 : error_at (declspecs->locations[ds_volatile],
5770 : : "%<volatile%> can only be specified for objects and "
5771 : : "functions");
5772 : 30591946 : else if (decl_spec_seq_has_spec_p (declspecs, ds_restrict))
5773 : 3 : error_at (declspecs->locations[ds_restrict],
5774 : : "%<__restrict%> can only be specified for objects and "
5775 : : "functions");
5776 : 30591943 : else if (decl_spec_seq_has_spec_p (declspecs, ds_thread))
5777 : 3 : error_at (declspecs->locations[ds_thread],
5778 : : "%<__thread%> can only be specified for objects "
5779 : : "and functions");
5780 : 30591940 : else if (saw_typedef)
5781 : 24 : warning_at (declspecs->locations[ds_typedef], 0,
5782 : : "%<typedef%> was ignored in this declaration");
5783 : 30591916 : else if (decl_spec_seq_has_spec_p (declspecs, ds_constexpr))
5784 : 9 : error_at (declspecs->locations[ds_constexpr],
5785 : : "%qs cannot be used for type declarations", "constexpr");
5786 : 30591907 : else if (decl_spec_seq_has_spec_p (declspecs, ds_constinit))
5787 : 3 : error_at (declspecs->locations[ds_constinit],
5788 : : "%qs cannot be used for type declarations", "constinit");
5789 : 30591904 : else if (decl_spec_seq_has_spec_p (declspecs, ds_consteval))
5790 : 3 : error_at (declspecs->locations[ds_consteval],
5791 : : "%qs cannot be used for type declarations", "consteval");
5792 : : }
5793 : :
5794 : 30681237 : if (declspecs->attributes && warn_attributes && declared_type)
5795 : : {
5796 : 31 : location_t loc;
5797 : 25 : if (!CLASS_TYPE_P (declared_type)
5798 : 56 : || !CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type))
5799 : : /* For a non-template class, use the name location. */
5800 : 22 : loc = location_of (declared_type);
5801 : : else
5802 : : /* For a template class (an explicit instantiation), use the
5803 : : current location. */
5804 : 9 : loc = input_location;
5805 : :
5806 : 31 : if (explicit_type_instantiation_p)
5807 : : /* [dcl.attr.grammar]/4:
5808 : :
5809 : : No attribute-specifier-seq shall appertain to an explicit
5810 : : instantiation. */
5811 : : {
5812 : 6 : auto_diagnostic_group d;
5813 : 6 : if (warning_at (loc, OPT_Wattributes,
5814 : : "attribute ignored in explicit instantiation %q#T",
5815 : : declared_type))
5816 : 6 : inform (loc,
5817 : : "no attribute can be applied to "
5818 : : "an explicit instantiation");
5819 : 6 : }
5820 : : else
5821 : 25 : warn_misplaced_attr_for_class_type (loc, declared_type);
5822 : : }
5823 : :
5824 : 30681237 : if (declspecs->std_attributes
5825 : 59 : && declared_type
5826 : 30681293 : && any_nonignored_attribute_p (declspecs->std_attributes))
5827 : : {
5828 : 56 : auto_diagnostic_group d;
5829 : 56 : if (warning_at (declspecs->locations[ds_std_attribute], OPT_Wattributes,
5830 : : "attribute ignored"))
5831 : 56 : inform (declspecs->locations[ds_std_attribute],
5832 : : "an attribute that appertains to a type-specifier is ignored");
5833 : 56 : }
5834 : :
5835 : : /* Diagnose invalid application of contracts, if any. */
5836 : 30681237 : if (find_contract (declspecs->attributes))
5837 : 1 : diagnose_misapplied_contracts (declspecs->attributes);
5838 : : else
5839 : 30681236 : diagnose_misapplied_contracts (declspecs->std_attributes);
5840 : :
5841 : : return declared_type;
5842 : : }
5843 : :
5844 : : /* Called when a declaration is seen that contains no names to declare.
5845 : : If its type is a reference to a structure, union or enum inherited
5846 : : from a containing scope, shadow that tag name for the current scope
5847 : : with a forward reference.
5848 : : If its type defines a new named structure or union
5849 : : or defines an enum, it is valid but we need not do anything here.
5850 : : Otherwise, it is an error.
5851 : :
5852 : : C++: may have to grok the declspecs to learn about static,
5853 : : complain for anonymous unions.
5854 : :
5855 : : Returns the TYPE declared -- or NULL_TREE if none. */
5856 : :
5857 : : tree
5858 : 26912250 : shadow_tag (cp_decl_specifier_seq *declspecs)
5859 : : {
5860 : 26912250 : tree t = check_tag_decl (declspecs,
5861 : : /*explicit_type_instantiation_p=*/false);
5862 : :
5863 : 26912250 : if (!t)
5864 : : return NULL_TREE;
5865 : :
5866 : 26910781 : t = maybe_process_partial_specialization (t);
5867 : 26910781 : if (t == error_mark_node)
5868 : : return NULL_TREE;
5869 : :
5870 : : /* This is where the variables in an anonymous union are
5871 : : declared. An anonymous union declaration looks like:
5872 : : union { ... } ;
5873 : : because there is no declarator after the union, the parser
5874 : : sends that declaration here. */
5875 : 26909636 : if (ANON_AGGR_TYPE_P (t))
5876 : : {
5877 : 242 : fixup_anonymous_aggr (t);
5878 : :
5879 : 242 : if (TYPE_FIELDS (t))
5880 : : {
5881 : 242 : tree decl = grokdeclarator (/*declarator=*/NULL,
5882 : : declspecs, NORMAL, 0, NULL);
5883 : 242 : finish_anon_union (decl);
5884 : : }
5885 : : }
5886 : :
5887 : : return t;
5888 : : }
5889 : :
5890 : : /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
5891 : :
5892 : : tree
5893 : 318253087 : groktypename (cp_decl_specifier_seq *type_specifiers,
5894 : : const cp_declarator *declarator,
5895 : : bool is_template_arg)
5896 : : {
5897 : 318253087 : tree attrs;
5898 : 318253087 : tree type;
5899 : 636506174 : enum decl_context context
5900 : 318253087 : = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
5901 : 318253087 : attrs = type_specifiers->attributes;
5902 : 318253087 : type_specifiers->attributes = NULL_TREE;
5903 : 318253087 : type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
5904 : 318253087 : if (attrs && type != error_mark_node)
5905 : : {
5906 : 577 : if (CLASS_TYPE_P (type))
5907 : 6 : warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
5908 : : "outside of definition", type);
5909 : 571 : else if (MAYBE_CLASS_TYPE_P (type))
5910 : : /* A template type parameter or other dependent type. */
5911 : 9 : warning (OPT_Wattributes, "ignoring attributes applied to dependent "
5912 : : "type %qT without an associated declaration", type);
5913 : : else
5914 : 562 : cplus_decl_attributes (&type, attrs, 0);
5915 : : }
5916 : 318253087 : return type;
5917 : : }
5918 : :
5919 : : /* Process a DECLARATOR for a function-scope or namespace-scope
5920 : : variable or function declaration.
5921 : : (Function definitions go through start_function; class member
5922 : : declarations appearing in the body of the class go through
5923 : : grokfield.) The DECL corresponding to the DECLARATOR is returned.
5924 : : If an error occurs, the error_mark_node is returned instead.
5925 : :
5926 : : DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
5927 : : SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
5928 : : for an explicitly defaulted function, or SD_DELETED for an explicitly
5929 : : deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
5930 : : implicitly initialized via a default constructor. It can also be
5931 : : SD_DECOMPOSITION which behaves much like SD_INITIALIZED, but we also
5932 : : mark the new decl as DECL_DECOMPOSITION_P.
5933 : :
5934 : : ATTRIBUTES and PREFIX_ATTRIBUTES are GNU attributes associated with this
5935 : : declaration.
5936 : :
5937 : : The scope represented by the context of the returned DECL is pushed
5938 : : (if it is not the global namespace) and is assigned to
5939 : : *PUSHED_SCOPE_P. The caller is then responsible for calling
5940 : : pop_scope on *PUSHED_SCOPE_P if it is set. */
5941 : :
5942 : : tree
5943 : 107046256 : start_decl (const cp_declarator *declarator,
5944 : : cp_decl_specifier_seq *declspecs,
5945 : : int initialized,
5946 : : tree attributes,
5947 : : tree prefix_attributes,
5948 : : tree *pushed_scope_p)
5949 : : {
5950 : 107046256 : tree decl;
5951 : 107046256 : tree context;
5952 : 107046256 : bool was_public;
5953 : 107046256 : int flags;
5954 : 107046256 : bool alias;
5955 : 107046256 : tree initial;
5956 : :
5957 : 107046256 : *pushed_scope_p = NULL_TREE;
5958 : :
5959 : 107046256 : if (prefix_attributes != error_mark_node)
5960 : 107046254 : attributes = attr_chainon (attributes, prefix_attributes);
5961 : :
5962 : 107046256 : decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
5963 : : &attributes);
5964 : :
5965 : 107046256 : if (decl == NULL_TREE || VOID_TYPE_P (decl)
5966 : 107046256 : || decl == error_mark_node
5967 : 107044142 : || prefix_attributes == error_mark_node)
5968 : 2116 : return error_mark_node;
5969 : :
5970 : 107044140 : context = CP_DECL_CONTEXT (decl);
5971 : 107044140 : if (context != global_namespace)
5972 : 16477756 : *pushed_scope_p = push_scope (context);
5973 : :
5974 : 107044140 : if (initialized && TREE_CODE (decl) == TYPE_DECL)
5975 : : {
5976 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
5977 : : "typedef %qD is initialized (use %qs instead)",
5978 : : decl, "decltype");
5979 : 9 : return error_mark_node;
5980 : : }
5981 : :
5982 : : /* Save the DECL_INITIAL value in case it gets clobbered to assist
5983 : : with attribute validation. */
5984 : 107044131 : initial = DECL_INITIAL (decl);
5985 : :
5986 : 107044131 : if (initialized)
5987 : : {
5988 : 47121098 : if (! toplevel_bindings_p ()
5989 : 47121098 : && DECL_EXTERNAL (decl))
5990 : 3 : warning (0, "declaration of %q#D has %<extern%> and is initialized",
5991 : : decl);
5992 : 47121098 : DECL_EXTERNAL (decl) = 0;
5993 : 47121098 : if (toplevel_bindings_p ())
5994 : 3970794 : TREE_STATIC (decl) = 1;
5995 : : /* Tell 'cplus_decl_attributes' this is an initialized decl,
5996 : : even though we might not yet have the initializer expression. */
5997 : 47121098 : if (!DECL_INITIAL (decl))
5998 : 46793746 : DECL_INITIAL (decl) = error_mark_node;
5999 : : }
6000 : 107044131 : alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
6001 : :
6002 : 107044131 : if (alias && TREE_CODE (decl) == FUNCTION_DECL)
6003 : 3859 : record_key_method_defined (decl);
6004 : :
6005 : : /* If this is a typedef that names the class for linkage purposes
6006 : : (7.1.3p8), apply any attributes directly to the type. */
6007 : 107044131 : if (TREE_CODE (decl) == TYPE_DECL
6008 : 18660999 : && OVERLOAD_TYPE_P (TREE_TYPE (decl))
6009 : 114453786 : && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
6010 : : flags = ATTR_FLAG_TYPE_IN_PLACE;
6011 : : else
6012 : : flags = 0;
6013 : :
6014 : : /* Set attributes here so if duplicate decl, will have proper attributes. */
6015 : 107044131 : cplus_decl_attributes (&decl, attributes, flags);
6016 : :
6017 : : /* Restore the original DECL_INITIAL that we may have clobbered earlier to
6018 : : assist with attribute validation. */
6019 : 107044131 : DECL_INITIAL (decl) = initial;
6020 : :
6021 : : /* Dllimported symbols cannot be defined. Static data members (which
6022 : : can be initialized in-class and dllimported) go through grokfield,
6023 : : not here, so we don't need to exclude those decls when checking for
6024 : : a definition. */
6025 : 107044131 : if (initialized && DECL_DLLIMPORT_P (decl))
6026 : : {
6027 : 0 : error_at (DECL_SOURCE_LOCATION (decl),
6028 : : "definition of %q#D is marked %<dllimport%>", decl);
6029 : 0 : DECL_DLLIMPORT_P (decl) = 0;
6030 : : }
6031 : :
6032 : : /* If #pragma weak was used, mark the decl weak now. */
6033 : 107044131 : if (!processing_template_decl && !DECL_DECOMPOSITION_P (decl))
6034 : 40905808 : maybe_apply_pragma_weak (decl);
6035 : :
6036 : 107044131 : if (TREE_CODE (decl) == FUNCTION_DECL
6037 : 35600234 : && DECL_DECLARED_INLINE_P (decl)
6038 : 1700886 : && DECL_UNINLINABLE (decl)
6039 : 107044131 : && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
6040 : : {
6041 : 0 : auto_urlify_attributes sentinel;
6042 : 0 : warning_at (DECL_SOURCE_LOCATION (decl), 0,
6043 : : "inline function %qD given attribute %qs", decl, "noinline");
6044 : 0 : }
6045 : :
6046 : 107044131 : if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
6047 : : {
6048 : 723577 : bool this_tmpl = (current_template_depth
6049 : 723577 : > template_class_depth (context));
6050 : 723577 : if (VAR_P (decl))
6051 : : {
6052 : 368152 : tree field = lookup_field (context, DECL_NAME (decl), 0, false);
6053 : 368152 : if (field == NULL_TREE
6054 : 368152 : || !(VAR_P (field) || variable_template_p (field)))
6055 : 7 : error ("%q+#D is not a static data member of %q#T", decl, context);
6056 : 368145 : else if (variable_template_p (field)
6057 : 368145 : && (DECL_LANG_SPECIFIC (decl)
6058 : 105 : && DECL_TEMPLATE_SPECIALIZATION (decl)))
6059 : : /* OK, specialization was already checked. */;
6060 : 368082 : else if (variable_template_p (field) && !this_tmpl)
6061 : : {
6062 : 3 : auto_diagnostic_group d;
6063 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
6064 : : "non-member-template declaration of %qD", decl);
6065 : 3 : inform (DECL_SOURCE_LOCATION (field), "does not match "
6066 : : "member template declaration here");
6067 : 3 : return error_mark_node;
6068 : 3 : }
6069 : : else
6070 : : {
6071 : 368079 : if (variable_template_p (field))
6072 : 39 : field = DECL_TEMPLATE_RESULT (field);
6073 : :
6074 : 368079 : if (DECL_CONTEXT (field) != context)
6075 : : {
6076 : 3 : if (!same_type_p (DECL_CONTEXT (field), context))
6077 : 3 : permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
6078 : : "to be defined as %<%T::%D%>",
6079 : 3 : DECL_CONTEXT (field), DECL_NAME (decl),
6080 : 3 : context, DECL_NAME (decl));
6081 : 3 : DECL_CONTEXT (decl) = DECL_CONTEXT (field);
6082 : : }
6083 : : /* Static data member are tricky; an in-class initialization
6084 : : still doesn't provide a definition, so the in-class
6085 : : declaration will have DECL_EXTERNAL set, but will have an
6086 : : initialization. Thus, duplicate_decls won't warn
6087 : : about this situation, and so we check here. */
6088 : 368079 : if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
6089 : 9 : error ("duplicate initialization of %qD", decl);
6090 : 368079 : field = duplicate_decls (decl, field);
6091 : 368079 : if (field == error_mark_node)
6092 : : return error_mark_node;
6093 : 368023 : else if (field)
6094 : 368023 : decl = field;
6095 : : }
6096 : : }
6097 : : else
6098 : : {
6099 : 355438 : tree field = check_classfn (context, decl,
6100 : : this_tmpl
6101 : 13 : ? current_template_parms
6102 : : : NULL_TREE);
6103 : 355353 : if (field && field != error_mark_node
6104 : 710778 : && duplicate_decls (decl, field))
6105 : 355352 : decl = field;
6106 : : }
6107 : :
6108 : : /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
6109 : 723518 : DECL_IN_AGGR_P (decl) = 0;
6110 : : /* Do not mark DECL as an explicit specialization if it was not
6111 : : already marked as an instantiation; a declaration should
6112 : : never be marked as a specialization unless we know what
6113 : : template is being specialized. */
6114 : 723518 : if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
6115 : : {
6116 : 353955 : SET_DECL_TEMPLATE_SPECIALIZATION (decl);
6117 : 353955 : if (TREE_CODE (decl) == FUNCTION_DECL)
6118 : 333416 : DECL_COMDAT (decl) = (TREE_PUBLIC (decl)
6119 : 333416 : && DECL_DECLARED_INLINE_P (decl));
6120 : : else
6121 : 20539 : DECL_COMDAT (decl) = false;
6122 : :
6123 : : /* [temp.expl.spec] An explicit specialization of a static data
6124 : : member of a template is a definition if the declaration
6125 : : includes an initializer; otherwise, it is a declaration.
6126 : :
6127 : : We check for processing_specialization so this only applies
6128 : : to the new specialization syntax. */
6129 : 353955 : if (!initialized && processing_specialization)
6130 : 353762 : DECL_EXTERNAL (decl) = 1;
6131 : : }
6132 : :
6133 : 1077349 : if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
6134 : : /* Aliases are definitions. */
6135 : 723575 : && !alias)
6136 : : {
6137 : 30 : if (DECL_VIRTUAL_P (decl) || !flag_contracts)
6138 : 11 : permerror (declarator->id_loc,
6139 : : "declaration of %q#D outside of class is not definition",
6140 : : decl);
6141 : 19 : else if (flag_contract_strict_declarations)
6142 : 4 : warning_at (declarator->id_loc, OPT_fcontract_strict_declarations_,
6143 : : "declaration of %q#D outside of class is not definition",
6144 : : decl);
6145 : : }
6146 : : }
6147 : :
6148 : : /* Create a DECL_LANG_SPECIFIC so that DECL_DECOMPOSITION_P works. */
6149 : 107044072 : if (initialized == SD_DECOMPOSITION)
6150 : 138264 : fit_decomposition_lang_decl (decl, NULL_TREE);
6151 : :
6152 : 107044072 : was_public = TREE_PUBLIC (decl);
6153 : :
6154 : 178247387 : if ((DECL_EXTERNAL (decl) || TREE_CODE (decl) == FUNCTION_DECL)
6155 : 107371442 : && current_function_decl)
6156 : : {
6157 : : /* A function-scope decl of some namespace-scope decl. */
6158 : 35425 : DECL_LOCAL_DECL_P (decl) = true;
6159 : 35425 : if (named_module_attach_p ())
6160 : 3 : error_at (declarator->id_loc,
6161 : : "block-scope extern declaration %q#D must not be"
6162 : : " attached to a named module", decl);
6163 : : }
6164 : :
6165 : : /* Enter this declaration into the symbol table. Don't push the plain
6166 : : VAR_DECL for a variable template. */
6167 : 107044072 : if (!template_parm_scope_p ()
6168 : 107044072 : || !VAR_P (decl))
6169 : 104508608 : decl = maybe_push_decl (decl);
6170 : :
6171 : 107044072 : if (processing_template_decl)
6172 : 66133239 : decl = push_template_decl (decl);
6173 : :
6174 : 107044072 : if (decl == error_mark_node)
6175 : : return error_mark_node;
6176 : :
6177 : 107043693 : if (VAR_P (decl)
6178 : 52782642 : && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
6179 : 65506 : && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl)
6180 : : /* But not templated variables. */
6181 : 107070552 : && !(DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)))
6182 : : {
6183 : : /* This is a const variable with implicit 'static'. Set
6184 : : DECL_THIS_STATIC so we can tell it from variables that are
6185 : : !TREE_PUBLIC because of the anonymous namespace. */
6186 : 26859 : gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
6187 : 26859 : DECL_THIS_STATIC (decl) = 1;
6188 : : }
6189 : :
6190 : 58890148 : if (current_function_decl && VAR_P (decl)
6191 : 47890601 : && DECL_DECLARED_CONSTEXPR_P (current_function_decl)
6192 : 111862918 : && cxx_dialect < cxx23)
6193 : : {
6194 : 2775968 : bool ok = false;
6195 : 2775968 : if (CP_DECL_THREAD_LOCAL_P (decl) && !DECL_REALLY_EXTERN (decl))
6196 : 20 : error_at (DECL_SOURCE_LOCATION (decl),
6197 : : "%qD defined %<thread_local%> in %qs function only "
6198 : : "available with %<-std=c++2b%> or %<-std=gnu++2b%>", decl,
6199 : 10 : DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
6200 : : ? "consteval" : "constexpr");
6201 : 2775958 : else if (TREE_STATIC (decl))
6202 : 76 : error_at (DECL_SOURCE_LOCATION (decl),
6203 : : "%qD defined %<static%> in %qs function only available "
6204 : : "with %<-std=c++2b%> or %<-std=gnu++2b%>", decl,
6205 : 38 : DECL_IMMEDIATE_FUNCTION_P (current_function_decl)
6206 : : ? "consteval" : "constexpr");
6207 : : else
6208 : : ok = true;
6209 : 48 : if (!ok)
6210 : 48 : cp_function_chain->invalid_constexpr = true;
6211 : : }
6212 : :
6213 : 107043693 : if (!processing_template_decl && VAR_P (decl))
6214 : 5103913 : start_decl_1 (decl, initialized);
6215 : :
6216 : 107043690 : return decl;
6217 : : }
6218 : :
6219 : : /* Process the declaration of a variable DECL. INITIALIZED is true
6220 : : iff DECL is explicitly initialized. (INITIALIZED is false if the
6221 : : variable is initialized via an implicitly-called constructor.)
6222 : : This function must be called for ordinary variables (including, for
6223 : : example, implicit instantiations of templates), but must not be
6224 : : called for template declarations. */
6225 : :
6226 : : void
6227 : 5111098 : start_decl_1 (tree decl, bool initialized)
6228 : : {
6229 : 5111098 : gcc_checking_assert (!processing_template_decl);
6230 : :
6231 : 5111098 : if (error_operand_p (decl))
6232 : : return;
6233 : :
6234 : 5111083 : gcc_checking_assert (VAR_P (decl));
6235 : :
6236 : 5111083 : tree type = TREE_TYPE (decl);
6237 : 5111083 : bool complete_p = COMPLETE_TYPE_P (type);
6238 : 5111083 : bool aggregate_definition_p
6239 : 5111083 : = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
6240 : :
6241 : : /* If an explicit initializer is present, or if this is a definition
6242 : : of an aggregate, then we need a complete type at this point.
6243 : : (Scalars are always complete types, so there is nothing to
6244 : : check.) This code just sets COMPLETE_P; errors (if necessary)
6245 : : are issued below. */
6246 : 3251211 : if ((initialized || aggregate_definition_p)
6247 : 4093739 : && !complete_p
6248 : 4116819 : && COMPLETE_TYPE_P (complete_type (type)))
6249 : : {
6250 : 323864 : complete_p = true;
6251 : : /* We will not yet have set TREE_READONLY on DECL if the type
6252 : : was "const", but incomplete, before this point. But, now, we
6253 : : have a complete type, so we can try again. */
6254 : 323864 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
6255 : : }
6256 : :
6257 : 5111080 : if (initialized)
6258 : : /* Is it valid for this decl to have an initializer at all? */
6259 : : {
6260 : : /* Don't allow initializations for incomplete types except for
6261 : : arrays which might be completed by the initialization. */
6262 : 3495705 : if (complete_p)
6263 : : ; /* A complete type is ok. */
6264 : 541517 : else if (type_uses_auto (type))
6265 : : ; /* An auto type is ok. */
6266 : 59533 : else if (TREE_CODE (type) != ARRAY_TYPE)
6267 : : {
6268 : 24 : auto_diagnostic_group d;
6269 : 24 : error ("variable %q#D has initializer but incomplete type", decl);
6270 : 42 : maybe_suggest_missing_header (input_location,
6271 : 24 : TYPE_IDENTIFIER (type),
6272 : 24 : CP_TYPE_CONTEXT (type));
6273 : 24 : type = TREE_TYPE (decl) = error_mark_node;
6274 : 24 : }
6275 : 59509 : else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
6276 : : {
6277 : 0 : if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
6278 : 0 : error ("elements of array %q#D have incomplete type", decl);
6279 : : /* else we already gave an error in start_decl. */
6280 : : }
6281 : : }
6282 : 1615375 : else if (aggregate_definition_p && !complete_p)
6283 : : {
6284 : 224 : if (type_uses_auto (type))
6285 : 64 : gcc_assert (CLASS_PLACEHOLDER_TEMPLATE (type));
6286 : : else
6287 : : {
6288 : 160 : auto_diagnostic_group d;
6289 : 160 : error ("aggregate %q#D has incomplete type and cannot be defined",
6290 : : decl);
6291 : 275 : maybe_suggest_missing_header (input_location,
6292 : 160 : TYPE_IDENTIFIER (type),
6293 : 160 : CP_TYPE_CONTEXT (type));
6294 : : /* Change the type so that assemble_variable will give
6295 : : DECL an rtl we can live with: (mem (const_int 0)). */
6296 : 160 : type = TREE_TYPE (decl) = error_mark_node;
6297 : 160 : }
6298 : : }
6299 : :
6300 : : /* Create a new scope to hold this declaration if necessary.
6301 : : Whether or not a new scope is necessary cannot be determined
6302 : : until after the type has been completed; if the type is a
6303 : : specialization of a class template it is not until after
6304 : : instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
6305 : : will be set correctly. */
6306 : 5111080 : maybe_push_cleanup_level (type);
6307 : : }
6308 : :
6309 : : /* Given a parenthesized list of values INIT, create a CONSTRUCTOR to handle
6310 : : C++20 P0960. TYPE is the type of the object we're initializing. */
6311 : :
6312 : : tree
6313 : 239 : do_aggregate_paren_init (tree init, tree type)
6314 : : {
6315 : 239 : tree val = TREE_VALUE (init);
6316 : :
6317 : 239 : if (TREE_CHAIN (init) == NULL_TREE)
6318 : : {
6319 : : /* If the list has a single element and it's a string literal,
6320 : : then it's the initializer for the array as a whole. */
6321 : 124 : if (TREE_CODE (type) == ARRAY_TYPE
6322 : 124 : && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
6323 : 155 : && TREE_CODE (tree_strip_any_location_wrapper (val))
6324 : : == STRING_CST)
6325 : : return val;
6326 : : /* Handle non-standard extensions like compound literals. This also
6327 : : prevents triggering aggregate parenthesized-initialization in
6328 : : compiler-generated code for =default. */
6329 : 97 : else if (same_type_ignoring_top_level_qualifiers_p (type,
6330 : 97 : TREE_TYPE (val)))
6331 : : return val;
6332 : : }
6333 : :
6334 : 187 : init = build_constructor_from_list (init_list_type_node, init);
6335 : 187 : CONSTRUCTOR_IS_DIRECT_INIT (init) = true;
6336 : 187 : CONSTRUCTOR_IS_PAREN_INIT (init) = true;
6337 : 187 : return init;
6338 : : }
6339 : :
6340 : : /* Handle initialization of references. DECL, TYPE, and INIT have the
6341 : : same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
6342 : : but will be set to a new CLEANUP_STMT if a temporary is created
6343 : : that must be destroyed subsequently.
6344 : :
6345 : : Returns an initializer expression to use to initialize DECL, or
6346 : : NULL if the initialization can be performed statically.
6347 : :
6348 : : Quotes on semantics can be found in ARM 8.4.3. */
6349 : :
6350 : : static tree
6351 : 285386 : grok_reference_init (tree decl, tree type, tree init, int flags)
6352 : : {
6353 : 285386 : if (init == NULL_TREE)
6354 : : {
6355 : 15 : if ((DECL_LANG_SPECIFIC (decl) == 0
6356 : 3 : || DECL_IN_AGGR_P (decl) == 0)
6357 : 18 : && ! DECL_THIS_EXTERN (decl))
6358 : 15 : error_at (DECL_SOURCE_LOCATION (decl),
6359 : : "%qD declared as reference but not initialized", decl);
6360 : 15 : return NULL_TREE;
6361 : : }
6362 : :
6363 : 285371 : tree ttype = TREE_TYPE (type);
6364 : 285371 : if (TREE_CODE (init) == TREE_LIST)
6365 : : {
6366 : : /* This handles (C++20 only) code like
6367 : :
6368 : : const A& r(1, 2, 3);
6369 : :
6370 : : where we treat the parenthesized list as a CONSTRUCTOR. */
6371 : 1334 : if (TREE_TYPE (init) == NULL_TREE
6372 : 1334 : && CP_AGGREGATE_TYPE_P (ttype)
6373 : 54 : && !DECL_DECOMPOSITION_P (decl)
6374 : 1385 : && (cxx_dialect >= cxx20))
6375 : : {
6376 : : /* We don't know yet if we should treat const A& r(1) as
6377 : : const A& r{1}. */
6378 : 33 : if (list_length (init) == 1)
6379 : : {
6380 : 12 : flags |= LOOKUP_AGGREGATE_PAREN_INIT;
6381 : 12 : init = build_x_compound_expr_from_list (init, ELK_INIT,
6382 : : tf_warning_or_error);
6383 : : }
6384 : : /* If the list had more than one element, the code is ill-formed
6385 : : pre-C++20, so we can build a constructor right away. */
6386 : : else
6387 : 21 : init = do_aggregate_paren_init (init, ttype);
6388 : : }
6389 : : else
6390 : 1301 : init = build_x_compound_expr_from_list (init, ELK_INIT,
6391 : : tf_warning_or_error);
6392 : : }
6393 : :
6394 : 285371 : if (TREE_CODE (ttype) != ARRAY_TYPE
6395 : 285371 : && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
6396 : : /* Note: default conversion is only called in very special cases. */
6397 : 12 : init = decay_conversion (init, tf_warning_or_error);
6398 : :
6399 : : /* check_initializer handles this for non-reference variables, but for
6400 : : references we need to do it here or the initializer will get the
6401 : : incomplete array type and confuse later calls to
6402 : : cp_complete_array_type. */
6403 : 285371 : if (TREE_CODE (ttype) == ARRAY_TYPE
6404 : 9484 : && TYPE_DOMAIN (ttype) == NULL_TREE
6405 : 285454 : && (BRACE_ENCLOSED_INITIALIZER_P (init)
6406 : 50 : || TREE_CODE (init) == STRING_CST))
6407 : : {
6408 : 33 : cp_complete_array_type (&ttype, init, false);
6409 : 33 : if (ttype != TREE_TYPE (type))
6410 : 33 : type = cp_build_reference_type (ttype, TYPE_REF_IS_RVALUE (type));
6411 : : }
6412 : :
6413 : : /* Convert INIT to the reference type TYPE. This may involve the
6414 : : creation of a temporary, whose lifetime must be the same as that
6415 : : of the reference. If so, a DECL_EXPR for the temporary will be
6416 : : added just after the DECL_EXPR for DECL. That's why we don't set
6417 : : DECL_INITIAL for local references (instead assigning to them
6418 : : explicitly); we need to allow the temporary to be initialized
6419 : : first. */
6420 : 285371 : return initialize_reference (type, init, flags,
6421 : 285371 : tf_warning_or_error);
6422 : : }
6423 : :
6424 : : /* Designated initializers in arrays are not supported in GNU C++.
6425 : : The parser cannot detect this error since it does not know whether
6426 : : a given brace-enclosed initializer is for a class type or for an
6427 : : array. This function checks that CE does not use a designated
6428 : : initializer. If it does, an error is issued. Returns true if CE
6429 : : is valid, i.e., does not have a designated initializer. */
6430 : :
6431 : : bool
6432 : 32563482 : check_array_designated_initializer (constructor_elt *ce,
6433 : : unsigned HOST_WIDE_INT index)
6434 : : {
6435 : : /* Designated initializers for array elements are not supported. */
6436 : 32563482 : if (ce->index)
6437 : : {
6438 : : /* The parser only allows identifiers as designated
6439 : : initializers. */
6440 : 20787812 : if (ce->index == error_mark_node)
6441 : : {
6442 : 0 : error ("name used in a GNU-style designated "
6443 : : "initializer for an array");
6444 : 0 : return false;
6445 : : }
6446 : 20787812 : else if (identifier_p (ce->index))
6447 : : {
6448 : 17 : error ("name %qD used in a GNU-style designated "
6449 : : "initializer for an array", ce->index);
6450 : 17 : return false;
6451 : : }
6452 : :
6453 : 20787795 : tree ce_index = build_expr_type_conversion (WANT_INT | WANT_ENUM,
6454 : : ce->index, true);
6455 : 20787795 : if (ce_index
6456 : 20787792 : && INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (ce_index))
6457 : 41575584 : && (TREE_CODE (ce_index = fold_non_dependent_expr (ce_index))
6458 : : == INTEGER_CST))
6459 : : {
6460 : : /* A C99 designator is OK if it matches the current index. */
6461 : 20787789 : if (wi::to_wide (ce_index) == index)
6462 : : {
6463 : 20787783 : ce->index = ce_index;
6464 : 20787783 : return true;
6465 : : }
6466 : : else
6467 : 6 : sorry ("non-trivial designated initializers not supported");
6468 : : }
6469 : : else
6470 : 6 : error_at (cp_expr_loc_or_input_loc (ce->index),
6471 : : "C99 designator %qE is not an integral constant-expression",
6472 : : ce->index);
6473 : :
6474 : 12 : return false;
6475 : : }
6476 : :
6477 : : return true;
6478 : : }
6479 : :
6480 : : /* When parsing `int a[] = {1, 2};' we don't know the size of the
6481 : : array until we finish parsing the initializer. If that's the
6482 : : situation we're in, update DECL accordingly. */
6483 : :
6484 : : static void
6485 : 51367085 : maybe_deduce_size_from_array_init (tree decl, tree init)
6486 : : {
6487 : 51367085 : tree type = TREE_TYPE (decl);
6488 : :
6489 : 51367085 : if (TREE_CODE (type) == ARRAY_TYPE
6490 : 743268 : && TYPE_DOMAIN (type) == NULL_TREE
6491 : 51843231 : && TREE_CODE (decl) != TYPE_DECL)
6492 : : {
6493 : : /* do_default is really a C-ism to deal with tentative definitions.
6494 : : But let's leave it here to ease the eventual merge. */
6495 : 476146 : int do_default = !DECL_EXTERNAL (decl);
6496 : 476146 : tree initializer = init ? init : DECL_INITIAL (decl);
6497 : 476146 : int failure = 0;
6498 : :
6499 : : /* Check that there are no designated initializers in INIT, as
6500 : : those are not supported in GNU C++, and as the middle-end
6501 : : will crash if presented with a non-numeric designated
6502 : : initializer. */
6503 : 476146 : if (initializer && BRACE_ENCLOSED_INITIALIZER_P (initializer))
6504 : : {
6505 : 87901 : vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (initializer);
6506 : 87901 : constructor_elt *ce;
6507 : 87901 : HOST_WIDE_INT i, j = 0;
6508 : 10173118 : FOR_EACH_VEC_SAFE_ELT (v, i, ce)
6509 : : {
6510 : 10087698 : if (instantiation_dependent_expression_p (ce->index))
6511 : 51367085 : return;
6512 : 10087692 : if (!check_array_designated_initializer (ce, j))
6513 : 2 : failure = 1;
6514 : : /* If an un-designated initializer is type-dependent, we can't
6515 : : check brace elision yet. */
6516 : 10087692 : if (ce->index == NULL_TREE
6517 : 10087692 : && type_dependent_expression_p (ce->value))
6518 : : return;
6519 : 10085217 : if (TREE_CODE (ce->value) == RAW_DATA_CST)
6520 : 130 : j += RAW_DATA_LENGTH (ce->value);
6521 : : else
6522 : 10085087 : ++j;
6523 : : }
6524 : : }
6525 : :
6526 : 85420 : if (failure)
6527 : 2 : TREE_TYPE (decl) = error_mark_node;
6528 : : else
6529 : : {
6530 : 473663 : failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
6531 : : do_default);
6532 : 473663 : if (failure == 1)
6533 : : {
6534 : 33 : error_at (cp_expr_loc_or_loc (initializer,
6535 : 30 : DECL_SOURCE_LOCATION (decl)),
6536 : : "initializer fails to determine size of %qD", decl);
6537 : : }
6538 : 473633 : else if (failure == 2)
6539 : : {
6540 : 30 : if (do_default)
6541 : : {
6542 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
6543 : : "array size missing in %qD", decl);
6544 : : }
6545 : : /* If a `static' var's size isn't known, make it extern as
6546 : : well as static, so it does not get allocated. If it's not
6547 : : `static', then don't mark it extern; finish_incomplete_decl
6548 : : will give it a default size and it will get allocated. */
6549 : 24 : else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
6550 : 0 : DECL_EXTERNAL (decl) = 1;
6551 : : }
6552 : 473603 : else if (failure == 3)
6553 : : {
6554 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
6555 : : "zero-size array %qD", decl);
6556 : : }
6557 : : }
6558 : :
6559 : 473665 : cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
6560 : :
6561 : 473665 : relayout_decl (decl);
6562 : : }
6563 : : }
6564 : :
6565 : : /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
6566 : : any appropriate error messages regarding the layout. */
6567 : :
6568 : : static void
6569 : 43303895 : layout_var_decl (tree decl)
6570 : : {
6571 : 43303895 : tree type;
6572 : :
6573 : 43303895 : type = TREE_TYPE (decl);
6574 : 43303895 : if (type == error_mark_node)
6575 : : return;
6576 : :
6577 : : /* If we haven't already laid out this declaration, do so now.
6578 : : Note that we must not call complete type for an external object
6579 : : because it's type might involve templates that we are not
6580 : : supposed to instantiate yet. (And it's perfectly valid to say
6581 : : `extern X x' for some incomplete type `X'.) */
6582 : 43303847 : if (!DECL_EXTERNAL (decl))
6583 : 35093441 : complete_type (type);
6584 : 43303847 : if (!DECL_SIZE (decl)
6585 : 2000382 : && TREE_TYPE (decl) != error_mark_node
6586 : 45304229 : && complete_or_array_type_p (type))
6587 : 1963398 : layout_decl (decl, 0);
6588 : :
6589 : 43303847 : if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
6590 : : {
6591 : : /* An automatic variable with an incomplete type: that is an error.
6592 : : Don't talk about array types here, since we took care of that
6593 : : message in grokdeclarator. */
6594 : 17 : error_at (DECL_SOURCE_LOCATION (decl),
6595 : : "storage size of %qD isn%'t known", decl);
6596 : 17 : TREE_TYPE (decl) = error_mark_node;
6597 : : }
6598 : : #if 0
6599 : : /* Keep this code around in case we later want to control debug info
6600 : : based on whether a type is "used". (jason 1999-11-11) */
6601 : :
6602 : : else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
6603 : : /* Let debugger know it should output info for this type. */
6604 : : note_debug_info_needed (ttype);
6605 : :
6606 : : if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
6607 : : note_debug_info_needed (DECL_CONTEXT (decl));
6608 : : #endif
6609 : :
6610 : 78397288 : if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
6611 : 21632663 : && DECL_SIZE (decl) != NULL_TREE
6612 : 64771573 : && ! TREE_CONSTANT (DECL_SIZE (decl)))
6613 : : {
6614 : 6 : if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST
6615 : 6 : && !DECL_LOCAL_DECL_P (decl))
6616 : 0 : constant_expression_warning (DECL_SIZE (decl));
6617 : : else
6618 : : {
6619 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
6620 : : "storage size of %qD isn%'t constant", decl);
6621 : 6 : TREE_TYPE (decl) = error_mark_node;
6622 : 6 : type = error_mark_node;
6623 : : }
6624 : : }
6625 : :
6626 : : /* If the final element initializes a flexible array field, adjust
6627 : : the size of the DECL with the initializer based on whether the
6628 : : DECL is a union or a structure. */
6629 : 43303847 : if (type != error_mark_node
6630 : 43303841 : && DECL_INITIAL (decl)
6631 : 21572573 : && TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR
6632 : 3474387 : && !vec_safe_is_empty (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)))
6633 : 2915520 : && DECL_SIZE (decl) != NULL_TREE
6634 : 2915520 : && TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST
6635 : 2915520 : && COMPLETE_TYPE_P (type)
6636 : 2915520 : && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST
6637 : 46219367 : && tree_int_cst_equal (DECL_SIZE (decl), TYPE_SIZE (type)))
6638 : : {
6639 : 2915520 : constructor_elt &elt = CONSTRUCTOR_ELTS (DECL_INITIAL (decl))->last ();
6640 : 2915520 : if (elt.index)
6641 : : {
6642 : 2715064 : tree itype = TREE_TYPE (elt.index);
6643 : 2715064 : tree vtype = TREE_TYPE (elt.value);
6644 : 2715064 : if (TREE_CODE (itype) == ARRAY_TYPE
6645 : 46699 : && TYPE_DOMAIN (itype) == NULL
6646 : 266 : && TREE_CODE (vtype) == ARRAY_TYPE
6647 : 2715330 : && COMPLETE_TYPE_P (vtype))
6648 : : {
6649 : : /* For a structure, add the size of the initializer to the DECL's
6650 : : size. */
6651 : 266 : if (TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE)
6652 : : {
6653 : 251 : DECL_SIZE (decl)
6654 : 251 : = size_binop (PLUS_EXPR, DECL_SIZE (decl),
6655 : : TYPE_SIZE (vtype));
6656 : 251 : DECL_SIZE_UNIT (decl)
6657 : 502 : = size_binop (PLUS_EXPR, DECL_SIZE_UNIT (decl),
6658 : : TYPE_SIZE_UNIT (vtype));
6659 : : }
6660 : : /* For a union, the DECL's size is the maximum of the current size
6661 : : and the size of the initializer. */
6662 : : else
6663 : : {
6664 : 15 : DECL_SIZE (decl)
6665 : 15 : = size_binop (MAX_EXPR, DECL_SIZE (decl),
6666 : : TYPE_SIZE (vtype));
6667 : 15 : DECL_SIZE_UNIT (decl)
6668 : 30 : = size_binop (MAX_EXPR, DECL_SIZE_UNIT (decl),
6669 : : TYPE_SIZE_UNIT (vtype));
6670 : : }
6671 : : }
6672 : : }
6673 : : }
6674 : : }
6675 : :
6676 : : /* If a local static variable is declared in an inline function, or if
6677 : : we have a weak definition, we must endeavor to create only one
6678 : : instance of the variable at link-time. */
6679 : :
6680 : : void
6681 : 47776837 : maybe_commonize_var (tree decl)
6682 : : {
6683 : : /* Don't mess with __FUNCTION__ and similar. But do handle structured
6684 : : bindings. */
6685 : 47776837 : if (DECL_ARTIFICIAL (decl) && !DECL_DECOMPOSITION_P (decl))
6686 : : return;
6687 : :
6688 : : /* Static data in a function with comdat linkage also has comdat
6689 : : linkage. */
6690 : 43104108 : if ((TREE_STATIC (decl)
6691 : 21051627 : && DECL_FUNCTION_SCOPE_P (decl)
6692 : 128093 : && vague_linkage_p (DECL_CONTEXT (decl)))
6693 : 85404623 : || (TREE_PUBLIC (decl) && DECL_INLINE_VAR_P (decl)))
6694 : : {
6695 : 16936373 : if (flag_weak)
6696 : : {
6697 : : /* With weak symbols, we simply make the variable COMDAT;
6698 : : that will cause copies in multiple translations units to
6699 : : be merged. */
6700 : 16936346 : comdat_linkage (decl);
6701 : : }
6702 : : else
6703 : : {
6704 : 27 : if (DECL_INITIAL (decl) == NULL_TREE
6705 : 27 : || DECL_INITIAL (decl) == error_mark_node)
6706 : : {
6707 : : /* Without weak symbols, we can use COMMON to merge
6708 : : uninitialized variables. */
6709 : 24 : TREE_PUBLIC (decl) = 1;
6710 : 24 : DECL_COMMON (decl) = 1;
6711 : : }
6712 : : else
6713 : : {
6714 : : /* While for initialized variables, we must use internal
6715 : : linkage -- which means that multiple copies will not
6716 : : be merged. */
6717 : 3 : TREE_PUBLIC (decl) = 0;
6718 : 3 : DECL_COMMON (decl) = 0;
6719 : 3 : DECL_INTERFACE_KNOWN (decl) = 1;
6720 : 3 : const char *msg;
6721 : 3 : if (DECL_INLINE_VAR_P (decl))
6722 : : msg = G_("sorry: semantics of inline variable "
6723 : : "%q#D are wrong (you%'ll wind up with "
6724 : : "multiple copies)");
6725 : : else
6726 : : msg = G_("sorry: semantics of inline function "
6727 : : "static data %q#D are wrong (you%'ll wind "
6728 : : "up with multiple copies)");
6729 : 3 : auto_diagnostic_group d;
6730 : 3 : if (warning_at (DECL_SOURCE_LOCATION (decl), 0,
6731 : : msg, decl))
6732 : 3 : inform (DECL_SOURCE_LOCATION (decl),
6733 : : "you can work around this by removing the initializer");
6734 : 3 : }
6735 : : }
6736 : : }
6737 : : }
6738 : :
6739 : : /* Issue an error message if DECL is an uninitialized const variable.
6740 : : CONSTEXPR_CONTEXT_P is true when the function is called in a constexpr
6741 : : context from potential_constant_expression. Returns true if all is well,
6742 : : false otherwise. */
6743 : :
6744 : : bool
6745 : 5955537 : check_for_uninitialized_const_var (tree decl, bool constexpr_context_p,
6746 : : tsubst_flags_t complain)
6747 : : {
6748 : 5955537 : tree type = strip_array_types (TREE_TYPE (decl));
6749 : :
6750 : : /* ``Unless explicitly declared extern, a const object does not have
6751 : : external linkage and must be initialized. ($8.4; $12.1)'' ARM
6752 : : 7.1.6 */
6753 : 5955537 : if (VAR_P (decl)
6754 : 5955537 : && !TYPE_REF_P (type)
6755 : 5934478 : && (CP_TYPE_CONST_P (type)
6756 : : /* C++20 permits trivial default initialization in constexpr
6757 : : context (P1331R2). */
6758 : 4929185 : || (cxx_dialect < cxx20
6759 : 2777526 : && (constexpr_context_p
6760 : 2482113 : || var_in_constexpr_fn (decl))))
6761 : 7367070 : && !DECL_NONTRIVIALLY_INITIALIZED_P (decl))
6762 : : {
6763 : 622230 : tree field = default_init_uninitialized_part (type);
6764 : 622230 : if (!field)
6765 : : return true;
6766 : :
6767 : 112664 : auto_diagnostic_group d;
6768 : 112664 : bool show_notes = true;
6769 : :
6770 : 112664 : if (!constexpr_context_p || cxx_dialect >= cxx20)
6771 : : {
6772 : 108956 : if (CP_TYPE_CONST_P (type))
6773 : : {
6774 : 90 : if (complain & tf_error)
6775 : 84 : show_notes = permerror (DECL_SOURCE_LOCATION (decl),
6776 : : "uninitialized %<const %D%>", decl);
6777 : : }
6778 : : else
6779 : : {
6780 : 108866 : if (!is_instantiation_of_constexpr (current_function_decl)
6781 : 108866 : && (complain & tf_error))
6782 : 21 : error_at (DECL_SOURCE_LOCATION (decl),
6783 : : "uninitialized variable %qD in %<constexpr%> "
6784 : : "function", decl);
6785 : : else
6786 : : show_notes = false;
6787 : 108866 : cp_function_chain->invalid_constexpr = true;
6788 : : }
6789 : : }
6790 : 3708 : else if (complain & tf_error)
6791 : 2 : error_at (DECL_SOURCE_LOCATION (decl),
6792 : : "uninitialized variable %qD in %<constexpr%> context",
6793 : : decl);
6794 : :
6795 : 112664 : if (show_notes && CLASS_TYPE_P (type) && (complain & tf_error))
6796 : : {
6797 : 62 : tree defaulted_ctor;
6798 : :
6799 : 62 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
6800 : : "%q#T has no user-provided default constructor", type);
6801 : 62 : defaulted_ctor = in_class_defaulted_default_constructor (type);
6802 : 62 : if (defaulted_ctor)
6803 : 33 : inform (DECL_SOURCE_LOCATION (defaulted_ctor),
6804 : : "constructor is not user-provided because it is "
6805 : : "explicitly defaulted in the class body");
6806 : 62 : inform (DECL_SOURCE_LOCATION (field),
6807 : : "and the implicitly-defined constructor does not "
6808 : : "initialize %q#D", field);
6809 : : }
6810 : :
6811 : 112664 : return false;
6812 : 112664 : }
6813 : :
6814 : : return true;
6815 : : }
6816 : :
6817 : : /* Structure holding the current initializer being processed by reshape_init.
6818 : : CUR is a pointer to the current element being processed, END is a pointer
6819 : : after the last element present in the initializer. */
6820 : : struct reshape_iter
6821 : : {
6822 : : constructor_elt *cur;
6823 : : constructor_elt *end;
6824 : : };
6825 : :
6826 : : static tree reshape_init_r (tree, reshape_iter *, tree, tsubst_flags_t);
6827 : :
6828 : : /* FIELD is an element of TYPE_FIELDS or NULL. In the former case, the value
6829 : : returned is the next FIELD_DECL (possibly FIELD itself) that can be
6830 : : initialized as if for an aggregate class. If there are no more such fields,
6831 : : the return value will be NULL. */
6832 : :
6833 : : tree
6834 : 12676039 : next_aggregate_field (tree field)
6835 : : {
6836 : 12676039 : while (field
6837 : 43316998 : && (TREE_CODE (field) != FIELD_DECL
6838 : 8135362 : || DECL_UNNAMED_BIT_FIELD (field)
6839 : 8135234 : || (DECL_ARTIFICIAL (field)
6840 : : /* In C++17, aggregates can have bases. */
6841 : 63935 : && !(cxx_dialect >= cxx17 && DECL_FIELD_IS_BASE (field)))))
6842 : 30640959 : field = DECL_CHAIN (field);
6843 : :
6844 : 12676039 : return field;
6845 : : }
6846 : :
6847 : : /* FIELD is an element of TYPE_FIELDS or NULL. In the former case, the value
6848 : : returned is the next FIELD_DECL (possibly FIELD itself) that corresponds
6849 : : to a subobject. If there are no more such fields, the return value will be
6850 : : NULL. */
6851 : :
6852 : : tree
6853 : 2108984 : next_subobject_field (tree field)
6854 : : {
6855 : 2108984 : while (field
6856 : 37310063 : && (TREE_CODE (field) != FIELD_DECL
6857 : 1200032 : || DECL_UNNAMED_BIT_FIELD (field)
6858 : 1200025 : || (DECL_ARTIFICIAL (field)
6859 : 208418 : && !DECL_FIELD_IS_BASE (field)
6860 : 850 : && !DECL_VIRTUAL_P (field))))
6861 : 35201079 : field = DECL_CHAIN (field);
6862 : :
6863 : 2108984 : return field;
6864 : : }
6865 : :
6866 : : /* Return true for [dcl.init.list] direct-list-initialization from
6867 : : single element of enumeration with a fixed underlying type. */
6868 : :
6869 : : bool
6870 : 110595350 : is_direct_enum_init (tree type, tree init)
6871 : : {
6872 : 110595350 : if (cxx_dialect >= cxx17
6873 : 108641058 : && TREE_CODE (type) == ENUMERAL_TYPE
6874 : 5642648 : && ENUM_FIXED_UNDERLYING_TYPE_P (type)
6875 : 3237795 : && TREE_CODE (init) == CONSTRUCTOR
6876 : 383614 : && CONSTRUCTOR_IS_DIRECT_INIT (init)
6877 : 189928 : && CONSTRUCTOR_NELTS (init) == 1
6878 : 218 : && TREE_CODE (CONSTRUCTOR_ELT (init, 0)->value) != RAW_DATA_CST
6879 : : /* DR 2374: The single element needs to be implicitly
6880 : : convertible to the underlying type of the enum. */
6881 : 218 : && !type_dependent_expression_p (CONSTRUCTOR_ELT (init, 0)->value)
6882 : 110595566 : && can_convert_arg (ENUM_UNDERLYING_TYPE (type),
6883 : 216 : TREE_TYPE (CONSTRUCTOR_ELT (init, 0)->value),
6884 : 216 : CONSTRUCTOR_ELT (init, 0)->value,
6885 : : LOOKUP_IMPLICIT, tf_none))
6886 : : return true;
6887 : : return false;
6888 : : }
6889 : :
6890 : : /* Helper function for reshape_init*. Split first element of
6891 : : RAW_DATA_CST and save the rest to d->cur->value. */
6892 : :
6893 : : static tree
6894 : 16855666 : cp_maybe_split_raw_data (reshape_iter *d)
6895 : : {
6896 : 16855666 : if (TREE_CODE (d->cur->value) != RAW_DATA_CST)
6897 : : return NULL_TREE;
6898 : 8089 : tree ret = *raw_data_iterator (d->cur->value, 0);
6899 : 8089 : ++RAW_DATA_POINTER (d->cur->value);
6900 : 8089 : --RAW_DATA_LENGTH (d->cur->value);
6901 : 8089 : if (RAW_DATA_LENGTH (d->cur->value) == 1)
6902 : 16 : d->cur->value = *raw_data_iterator (d->cur->value, 0);
6903 : : return ret;
6904 : : }
6905 : :
6906 : : /* Wrapper around that which for RAW_DATA_CST in INIT
6907 : : (as well as in D->cur->value) peels off the first element
6908 : : of the raw data and returns it, otherwise increments
6909 : : D->cur and returns INIT. */
6910 : :
6911 : : static tree
6912 : 16855617 : consume_init (tree init, reshape_iter *d)
6913 : : {
6914 : 16855617 : if (tree raw_init = cp_maybe_split_raw_data (d))
6915 : : return raw_init;
6916 : 16847528 : d->cur++;
6917 : 16847528 : return init;
6918 : : }
6919 : :
6920 : : /* Subroutine of reshape_init_array and reshape_init_vector, which does
6921 : : the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
6922 : : INTEGER_CST representing the size of the array minus one (the maximum index),
6923 : : or NULL_TREE if the array was declared without specifying the size. D is
6924 : : the iterator within the constructor. */
6925 : :
6926 : : static tree
6927 : 351889 : reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d,
6928 : : tree first_initializer_p, bool vector_p,
6929 : : tsubst_flags_t complain)
6930 : : {
6931 : 351889 : tree new_init;
6932 : 351889 : bool sized_array_p = (max_index && TREE_CONSTANT (max_index));
6933 : 351889 : unsigned HOST_WIDE_INT max_index_cst = 0;
6934 : 351889 : unsigned HOST_WIDE_INT index;
6935 : :
6936 : : /* The initializer for an array is always a CONSTRUCTOR. If this is the
6937 : : outermost CONSTRUCTOR and the element type is non-aggregate, we don't need
6938 : : to build a new one. But don't reuse if not complaining; if this is
6939 : : tentative, we might also reshape to another type (95319). */
6940 : 351889 : bool reuse = (first_initializer_p
6941 : 308788 : && (complain & tf_error)
6942 : 307986 : && !CP_AGGREGATE_TYPE_P (elt_type)
6943 : 613201 : && !TREE_SIDE_EFFECTS (first_initializer_p));
6944 : 95364 : if (reuse)
6945 : : new_init = first_initializer_p;
6946 : : else
6947 : 95364 : new_init = build_constructor (init_list_type_node, NULL);
6948 : :
6949 : 351889 : if (sized_array_p)
6950 : : {
6951 : 250629 : poly_uint64 midx;
6952 : : /* Minus 1 is used for zero sized arrays. */
6953 : 250629 : if (integer_all_onesp (max_index))
6954 : 24 : return new_init;
6955 : :
6956 : 250605 : if (tree_fits_poly_uint64_p (max_index))
6957 : 250605 : midx = tree_to_poly_uint64 (max_index);
6958 : : /* sizetype is sign extended, not zero extended. */
6959 : : else
6960 : 0 : midx = tree_to_poly_uint64 (fold_convert (size_type_node, max_index));
6961 : :
6962 : : /* For VLA vectors, we restict the number of elements in the constructor
6963 : : to lower bound of the VLA elements. */
6964 : 250605 : max_index_cst = constant_lower_bound (midx);
6965 : : }
6966 : :
6967 : 351865 : constructor_elt *first_cur = d->cur;
6968 : : /* Loop until there are no more initializers. */
6969 : 12279013 : for (index = 0;
6970 : 12279013 : d->cur != d->end && (!sized_array_p || index <= max_index_cst);
6971 : : ++index)
6972 : : {
6973 : 11927330 : tree elt_init;
6974 : 11927330 : constructor_elt *old_cur = d->cur;
6975 : 11927330 : const char *old_raw_data_ptr = NULL;
6976 : :
6977 : 11927330 : if (TREE_CODE (d->cur->value) == RAW_DATA_CST)
6978 : 8325 : old_raw_data_ptr = RAW_DATA_POINTER (d->cur->value);
6979 : :
6980 : 11927330 : if (d->cur->index)
6981 : 1352223 : CONSTRUCTOR_IS_DESIGNATED_INIT (new_init) = true;
6982 : 11927330 : check_array_designated_initializer (d->cur, index);
6983 : 11927330 : if (TREE_CODE (d->cur->value) == RAW_DATA_CST
6984 : 8325 : && (TREE_CODE (elt_type) == INTEGER_TYPE
6985 : 3 : || is_byte_access_type (elt_type))
6986 : 8322 : && TYPE_PRECISION (elt_type) == CHAR_BIT
6987 : 854 : && (!sized_array_p || index < max_index_cst)
6988 : 11928172 : && !vector_p)
6989 : : {
6990 : 287 : elt_init = d->cur->value;
6991 : 287 : if (!sized_array_p
6992 : 287 : || ((unsigned) RAW_DATA_LENGTH (d->cur->value)
6993 : 30 : <= max_index_cst - index + 1))
6994 : 278 : d->cur++;
6995 : : else
6996 : : {
6997 : 9 : unsigned int len = max_index_cst - index + 1;
6998 : 9 : if ((unsigned) RAW_DATA_LENGTH (d->cur->value) == len + 1)
6999 : 0 : d->cur->value
7000 : 0 : = build_int_cst (integer_type_node,
7001 : 0 : *(const unsigned char *)
7002 : 0 : RAW_DATA_POINTER (d->cur->value) + len);
7003 : : else
7004 : : {
7005 : 9 : d->cur->value = copy_node (elt_init);
7006 : 9 : RAW_DATA_LENGTH (d->cur->value) -= len;
7007 : 9 : RAW_DATA_POINTER (d->cur->value) += len;
7008 : : }
7009 : 9 : RAW_DATA_LENGTH (elt_init) = len;
7010 : : }
7011 : 287 : TREE_TYPE (elt_init) = elt_type;
7012 : : }
7013 : : else
7014 : 11927043 : elt_init = reshape_init_r (elt_type, d,
7015 : : /*first_initializer_p=*/NULL_TREE,
7016 : : complain);
7017 : 11927330 : if (elt_init == error_mark_node)
7018 : : return error_mark_node;
7019 : 11927151 : tree idx = size_int (index);
7020 : 11927151 : if (reuse && old_raw_data_ptr && d->cur == old_cur)
7021 : : {
7022 : : /* We need to stop reusing as some RAW_DATA_CST in the original
7023 : : ctor had to be split. */
7024 : 10 : new_init = build_constructor (init_list_type_node, NULL);
7025 : 10 : if (index)
7026 : : {
7027 : 10 : vec_safe_grow (CONSTRUCTOR_ELTS (new_init), index);
7028 : 10 : memcpy (CONSTRUCTOR_ELT (new_init, 0), first_cur,
7029 : 10 : (d->cur - first_cur)
7030 : : * sizeof (*CONSTRUCTOR_ELT (new_init, 0)));
7031 : 10 : if (CONSTRUCTOR_IS_DESIGNATED_INIT (first_initializer_p))
7032 : : {
7033 : : unsigned int j;
7034 : : tree nidx, nval;
7035 : 4 : FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (new_init),
7036 : : j, nidx, nval)
7037 : 4 : if (nidx)
7038 : : {
7039 : 4 : CONSTRUCTOR_IS_DESIGNATED_INIT (new_init) = 1;
7040 : 4 : (void) nval;
7041 : 4 : break;
7042 : : }
7043 : : }
7044 : : }
7045 : : reuse = false;
7046 : : }
7047 : 11927141 : if (reuse)
7048 : : {
7049 : 10408380 : old_cur->index = idx;
7050 : 10408380 : old_cur->value = elt_init;
7051 : : }
7052 : : else
7053 : 1518771 : CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
7054 : : idx, elt_init);
7055 : 11927151 : if (!TREE_CONSTANT (elt_init))
7056 : 132213 : TREE_CONSTANT (new_init) = false;
7057 : :
7058 : : /* This can happen with an invalid initializer (c++/54501). */
7059 : 11927151 : if (d->cur == old_cur
7060 : 8047 : && !sized_array_p
7061 : 11934622 : && (old_raw_data_ptr == NULL
7062 : 7468 : || (TREE_CODE (d->cur->value) == RAW_DATA_CST
7063 : 7458 : && RAW_DATA_POINTER (d->cur->value) == old_raw_data_ptr)))
7064 : : break;
7065 : :
7066 : 11927148 : if (TREE_CODE (elt_init) == RAW_DATA_CST)
7067 : 287 : index += RAW_DATA_LENGTH (elt_init) - 1;
7068 : : }
7069 : :
7070 : : return new_init;
7071 : : }
7072 : :
7073 : : /* Subroutine of reshape_init_r, processes the initializers for arrays.
7074 : : Parameters are the same of reshape_init_r. */
7075 : :
7076 : : static tree
7077 : 311076 : reshape_init_array (tree type, reshape_iter *d, tree first_initializer_p,
7078 : : tsubst_flags_t complain)
7079 : : {
7080 : 311076 : tree max_index = NULL_TREE;
7081 : :
7082 : 311076 : gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
7083 : :
7084 : 311076 : if (TYPE_DOMAIN (type))
7085 : 209861 : max_index = array_type_nelts_minus_one (type);
7086 : :
7087 : 311076 : return reshape_init_array_1 (TREE_TYPE (type), max_index, d,
7088 : 311076 : first_initializer_p, false, complain);
7089 : : }
7090 : :
7091 : : /* Subroutine of reshape_init_r, processes the initializers for vectors.
7092 : : Parameters are the same of reshape_init_r. */
7093 : :
7094 : : static tree
7095 : 40813 : reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
7096 : : {
7097 : 40813 : tree max_index = NULL_TREE;
7098 : :
7099 : 40813 : gcc_assert (VECTOR_TYPE_P (type));
7100 : :
7101 : 40813 : if (COMPOUND_LITERAL_P (d->cur->value))
7102 : : {
7103 : 0 : tree value = d->cur->value;
7104 : 0 : if (!same_type_p (TREE_TYPE (value), type))
7105 : : {
7106 : 0 : if (complain & tf_error)
7107 : 0 : error ("invalid type %qT as initializer for a vector of type %qT",
7108 : 0 : TREE_TYPE (d->cur->value), type);
7109 : 0 : value = error_mark_node;
7110 : : }
7111 : 0 : ++d->cur;
7112 : 0 : return value;
7113 : : }
7114 : :
7115 : : /* For a vector, we initialize it as an array of the appropriate size. */
7116 : 40813 : if (VECTOR_TYPE_P (type))
7117 : 40813 : max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
7118 : :
7119 : 40813 : return reshape_init_array_1 (TREE_TYPE (type), max_index, d,
7120 : 40813 : NULL_TREE, true, complain);
7121 : : }
7122 : :
7123 : : /* Subroutine of reshape_init*: We're initializing an element with TYPE from
7124 : : INIT, in isolation from any designator or other initializers. */
7125 : :
7126 : : static tree
7127 : 499531 : reshape_single_init (tree type, tree init, tsubst_flags_t complain)
7128 : : {
7129 : : /* We could also implement this by wrapping init in a new CONSTRUCTOR and
7130 : : calling reshape_init, but this way can just live on the stack. */
7131 : 499531 : constructor_elt elt = { /*index=*/NULL_TREE, init };
7132 : 499531 : reshape_iter iter = { &elt, &elt + 1 };
7133 : 499531 : return reshape_init_r (type, &iter,
7134 : : /*first_initializer_p=*/NULL_TREE,
7135 : 499531 : complain);
7136 : : }
7137 : :
7138 : : /* Subroutine of reshape_init_r, processes the initializers for classes
7139 : : or union. Parameters are the same of reshape_init_r. */
7140 : :
7141 : : static tree
7142 : 3211858 : reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
7143 : : tsubst_flags_t complain)
7144 : : {
7145 : 3211858 : tree field;
7146 : 3211858 : tree new_init;
7147 : :
7148 : 3211858 : gcc_assert (CLASS_TYPE_P (type));
7149 : :
7150 : : /* The initializer for a class is always a CONSTRUCTOR. */
7151 : 3211858 : new_init = build_constructor (init_list_type_node, NULL);
7152 : :
7153 : 3211858 : int binfo_idx = -1;
7154 : 3211858 : tree binfo = TYPE_BINFO (type);
7155 : 3211858 : tree base_binfo = NULL_TREE;
7156 : 3211858 : if (cxx_dialect >= cxx17 && uses_template_parms (type))
7157 : : {
7158 : : /* We get here from maybe_aggr_guide for C++20 class template argument
7159 : : deduction. In this case we need to look through the binfo because a
7160 : : template doesn't have base fields. */
7161 : 306 : binfo_idx = 0;
7162 : 306 : BINFO_BASE_ITERATE (binfo, binfo_idx, base_binfo);
7163 : : }
7164 : 67 : if (base_binfo)
7165 : : field = base_binfo;
7166 : : else
7167 : 3211791 : field = next_aggregate_field (TYPE_FIELDS (type));
7168 : :
7169 : 3211858 : if (!field)
7170 : : {
7171 : : /* [dcl.init.aggr]
7172 : :
7173 : : An initializer for an aggregate member that is an
7174 : : empty class shall have the form of an empty
7175 : : initializer-list {}. */
7176 : 324 : if (!first_initializer_p)
7177 : : {
7178 : 270 : if (complain & tf_error)
7179 : 13 : error ("initializer for %qT must be brace-enclosed", type);
7180 : 270 : return error_mark_node;
7181 : : }
7182 : : return new_init;
7183 : : }
7184 : :
7185 : : /* For C++20 CTAD, handle pack expansions in the base list. */
7186 : : tree last_was_pack_expansion = NULL_TREE;
7187 : :
7188 : : /* Loop through the initializable fields, gathering initializers. */
7189 : 9806661 : while (d->cur != d->end)
7190 : : {
7191 : 6702794 : tree field_init;
7192 : 6702794 : constructor_elt *old_cur = d->cur;
7193 : 6702794 : const char *old_raw_data_ptr = NULL;
7194 : 6702794 : bool direct_desig = false;
7195 : :
7196 : 6702794 : if (TREE_CODE (d->cur->value) == RAW_DATA_CST)
7197 : 115 : old_raw_data_ptr = RAW_DATA_POINTER (d->cur->value);
7198 : :
7199 : : /* Handle C++20 designated initializers. */
7200 : 6702794 : if (d->cur->index)
7201 : : {
7202 : 499691 : if (d->cur->index == error_mark_node)
7203 : : return error_mark_node;
7204 : :
7205 : 499685 : if (TREE_CODE (d->cur->index) == FIELD_DECL)
7206 : : {
7207 : : /* We already reshaped this; we should have returned early from
7208 : : reshape_init. */
7209 : 0 : gcc_checking_assert (false);
7210 : : if (field != d->cur->index)
7211 : : {
7212 : : if (tree id = DECL_NAME (d->cur->index))
7213 : : gcc_checking_assert (d->cur->index
7214 : : == get_class_binding (type, id));
7215 : : field = d->cur->index;
7216 : : }
7217 : : }
7218 : 499685 : else if (TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
7219 : : {
7220 : 499679 : CONSTRUCTOR_IS_DESIGNATED_INIT (new_init) = true;
7221 : 499679 : field = get_class_binding (type, d->cur->index);
7222 : 499679 : direct_desig = true;
7223 : : }
7224 : : else
7225 : : {
7226 : 6 : if (complain & tf_error)
7227 : 6 : error ("%<[%E] =%> used in a GNU-style designated initializer"
7228 : : " for class %qT", d->cur->index, type);
7229 : 6 : return error_mark_node;
7230 : : }
7231 : :
7232 : 499679 : if (!field && ANON_AGGR_TYPE_P (type))
7233 : : /* Apparently the designator isn't for a member of this anonymous
7234 : : struct, so head back to the enclosing class. */
7235 : : break;
7236 : :
7237 : 499676 : if (!field || TREE_CODE (field) != FIELD_DECL)
7238 : : {
7239 : 18 : if (complain & tf_error)
7240 : : {
7241 : 6 : if (field && TREE_CODE (field) == TREE_LIST)
7242 : : {
7243 : 3 : auto_diagnostic_group g;
7244 : 3 : error ("request for member %qD is ambiguous",
7245 : 3 : d->cur->index);
7246 : 3 : print_candidates (field);
7247 : 3 : }
7248 : : else
7249 : 3 : error ("%qT has no non-static data member named %qD", type,
7250 : 3 : d->cur->index);
7251 : : }
7252 : 18 : return error_mark_node;
7253 : : }
7254 : :
7255 : : /* If the element is an anonymous union object and the initializer
7256 : : list is a designated-initializer-list, the anonymous union object
7257 : : is initialized by the designated-initializer-list { D }, where D
7258 : : is the designated-initializer-clause naming a member of the
7259 : : anonymous union object. */
7260 : 499658 : tree ictx = DECL_CONTEXT (field);
7261 : 499658 : if (!same_type_ignoring_top_level_qualifiers_p (ictx, type))
7262 : : {
7263 : : /* Find the anon aggr that is a direct member of TYPE. */
7264 : 139 : while (ANON_AGGR_TYPE_P (ictx))
7265 : : {
7266 : 136 : tree cctx = TYPE_CONTEXT (ictx);
7267 : 136 : if (same_type_ignoring_top_level_qualifiers_p (cctx, type))
7268 : 124 : goto found;
7269 : : ictx = cctx;
7270 : : }
7271 : :
7272 : : /* Not found, e.g. FIELD is a member of a base class. */
7273 : 3 : if (complain & tf_error)
7274 : 3 : error ("%qD is not a direct member of %qT", field, type);
7275 : 3 : return error_mark_node;
7276 : :
7277 : 124 : found:
7278 : : /* Now find the TYPE member with that anon aggr type. */
7279 : 124 : tree aafield = TYPE_FIELDS (type);
7280 : 1067 : for (; aafield; aafield = TREE_CHAIN (aafield))
7281 : 1067 : if (TREE_TYPE (aafield) == ictx)
7282 : : break;
7283 : 0 : gcc_assert (aafield);
7284 : : field = aafield;
7285 : : direct_desig = false;
7286 : : }
7287 : : }
7288 : :
7289 : : /* If we processed all the member of the class, we are done. */
7290 : 6702634 : if (!field)
7291 : : break;
7292 : :
7293 : 13404723 : last_was_pack_expansion = (PACK_EXPANSION_P (TREE_TYPE (field))
7294 : 6702371 : ? field : NULL_TREE);
7295 : 6702371 : if (last_was_pack_expansion)
7296 : : /* Each non-trailing aggregate element that is a pack expansion is
7297 : : assumed to correspond to no elements of the initializer list. */
7298 : 19 : goto continue_;
7299 : :
7300 : 6702352 : if (direct_desig)
7301 : : {
7302 : : /* The designated field F is initialized from this one element.
7303 : :
7304 : : Note that we don't want to do this if we found the designator
7305 : : inside an anon aggr above; we use the normal code to implement:
7306 : :
7307 : : "If the element is an anonymous union member and the initializer
7308 : : list is a brace-enclosed designated- initializer-list, the element
7309 : : is initialized by the designated-initializer-list { D }, where D
7310 : : is the designated- initializer-clause naming a member of the
7311 : : anonymous union member." */
7312 : 499531 : gcc_checking_assert (TREE_CODE (d->cur->value) != RAW_DATA_CST);
7313 : 499531 : field_init = reshape_single_init (TREE_TYPE (field),
7314 : : d->cur->value, complain);
7315 : 499531 : d->cur++;
7316 : : }
7317 : : else
7318 : 6202821 : field_init = reshape_init_r (TREE_TYPE (field), d,
7319 : : /*first_initializer_p=*/NULL_TREE,
7320 : : complain);
7321 : :
7322 : 6702352 : if (field_init == error_mark_node)
7323 : : return error_mark_node;
7324 : :
7325 : 6702063 : if (d->cur == old_cur
7326 : 93 : && d->cur->index
7327 : 6702063 : && (old_raw_data_ptr == NULL
7328 : 0 : || (TREE_CODE (d->cur->value) == RAW_DATA_CST
7329 : 0 : && RAW_DATA_POINTER (d->cur->value) == old_raw_data_ptr)))
7330 : : {
7331 : : /* This can happen with an invalid initializer for a flexible
7332 : : array member (c++/54441). */
7333 : 0 : if (complain & tf_error)
7334 : 0 : error ("invalid initializer for %q#D", field);
7335 : 0 : return error_mark_node;
7336 : : }
7337 : :
7338 : 6702063 : CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
7339 : :
7340 : : /* [dcl.init.aggr]
7341 : :
7342 : : When a union is initialized with a brace-enclosed
7343 : : initializer, the braces shall only contain an
7344 : : initializer for the first member of the union. */
7345 : 6702063 : if (TREE_CODE (type) == UNION_TYPE)
7346 : : break;
7347 : :
7348 : 6595108 : continue_:
7349 : 6595127 : if (base_binfo)
7350 : : {
7351 : 82 : if (BINFO_BASE_ITERATE (binfo, ++binfo_idx, base_binfo))
7352 : : field = base_binfo;
7353 : : else
7354 : 35 : field = next_aggregate_field (TYPE_FIELDS (type));
7355 : : }
7356 : : else
7357 : 6595045 : field = next_aggregate_field (DECL_CHAIN (field));
7358 : : }
7359 : :
7360 : : /* A trailing aggregate element that is a pack expansion is assumed to
7361 : : correspond to all remaining elements of the initializer list (if any). */
7362 : 3211212 : if (last_was_pack_expansion)
7363 : : {
7364 : 16 : tree init = d->cur->value;
7365 : 16 : if (tree raw_init = cp_maybe_split_raw_data (d))
7366 : 0 : init = raw_init;
7367 : 16 : CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
7368 : : last_was_pack_expansion, init);
7369 : 46 : while (d->cur != d->end)
7370 : 30 : d->cur++;
7371 : : }
7372 : :
7373 : : return new_init;
7374 : : }
7375 : :
7376 : : /* Subroutine of reshape_init_r. We're in a context where C99 initializer
7377 : : designators are not valid; either complain or return true to indicate
7378 : : that reshape_init_r should return error_mark_node. */
7379 : :
7380 : : static bool
7381 : 54133 : has_designator_problem (reshape_iter *d, tsubst_flags_t complain)
7382 : : {
7383 : 54133 : if (d->cur->index)
7384 : : {
7385 : 30 : if (complain & tf_error)
7386 : 45 : error_at (cp_expr_loc_or_input_loc (d->cur->index),
7387 : : "C99 designator %qE outside aggregate initializer",
7388 : : d->cur->index);
7389 : : else
7390 : : return true;
7391 : : }
7392 : : return false;
7393 : : }
7394 : :
7395 : : /* Subroutine of reshape_init, which processes a single initializer (part of
7396 : : a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
7397 : : iterator within the CONSTRUCTOR which points to the initializer to process.
7398 : : If this is the first initializer of the outermost CONSTRUCTOR node,
7399 : : FIRST_INITIALIZER_P is that CONSTRUCTOR; otherwise, it is NULL_TREE. */
7400 : :
7401 : : static tree
7402 : 22244066 : reshape_init_r (tree type, reshape_iter *d, tree first_initializer_p,
7403 : : tsubst_flags_t complain)
7404 : : {
7405 : 22244066 : tree init = d->cur->value;
7406 : :
7407 : 22244066 : if (error_operand_p (init))
7408 : 121 : return error_mark_node;
7409 : :
7410 : 3614553 : if (first_initializer_p && !CP_AGGREGATE_TYPE_P (type)
7411 : 22297915 : && has_designator_problem (d, complain))
7412 : 0 : return error_mark_node;
7413 : :
7414 : 22243945 : tree stripped_init = tree_strip_any_location_wrapper (init);
7415 : :
7416 : 22243945 : if (TREE_CODE (type) == COMPLEX_TYPE)
7417 : : {
7418 : : /* A complex type can be initialized from one or two initializers,
7419 : : but braces are not elided. */
7420 : 555 : init = consume_init (init, d);
7421 : 555 : if (BRACE_ENCLOSED_INITIALIZER_P (stripped_init))
7422 : : {
7423 : 9 : if (CONSTRUCTOR_NELTS (stripped_init) > 2)
7424 : : {
7425 : 0 : if (complain & tf_error)
7426 : 0 : error ("too many initializers for %qT", type);
7427 : : else
7428 : 0 : return error_mark_node;
7429 : : }
7430 : : }
7431 : 546 : else if (first_initializer_p && d->cur != d->end)
7432 : : {
7433 : 33 : vec<constructor_elt, va_gc> *v = 0;
7434 : 33 : CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
7435 : 33 : tree raw_init = cp_maybe_split_raw_data (d);
7436 : 33 : CONSTRUCTOR_APPEND_ELT (v, NULL_TREE,
7437 : : raw_init ? raw_init : d->cur->value);
7438 : 33 : if (has_designator_problem (d, complain))
7439 : 0 : return error_mark_node;
7440 : 33 : if (!raw_init)
7441 : 33 : d->cur++;
7442 : 33 : init = build_constructor (init_list_type_node, v);
7443 : : }
7444 : 555 : return init;
7445 : : }
7446 : :
7447 : : /* A non-aggregate type is always initialized with a single
7448 : : initializer. */
7449 : 44437290 : if (!CP_AGGREGATE_TYPE_P (type)
7450 : : /* As is an array with dependent bound, which we can see
7451 : : during C++20 aggregate CTAD. */
7452 : 27585355 : || (cxx_dialect >= cxx20
7453 : 3195950 : && TREE_CODE (type) == ARRAY_TYPE
7454 : 134128 : && uses_template_parms (TYPE_DOMAIN (type))))
7455 : : {
7456 : : /* It is invalid to initialize a non-aggregate type with a
7457 : : brace-enclosed initializer before C++0x.
7458 : : We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
7459 : : of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
7460 : : a CONSTRUCTOR (with a record type). */
7461 : 16851946 : if (TREE_CODE (stripped_init) == CONSTRUCTOR
7462 : : /* Don't complain about a capture-init. */
7463 : 293588 : && !CONSTRUCTOR_IS_DIRECT_INIT (stripped_init)
7464 : 17135899 : && BRACE_ENCLOSED_INITIALIZER_P (stripped_init)) /* p7626.C */
7465 : : {
7466 : 283914 : if (SCALAR_TYPE_P (type))
7467 : : {
7468 : 723 : if (cxx_dialect < cxx11)
7469 : : {
7470 : 16 : if (complain & tf_error)
7471 : 16 : error ("braces around scalar initializer for type %qT",
7472 : : type);
7473 : 16 : init = error_mark_node;
7474 : : }
7475 : 707 : else if (first_initializer_p
7476 : 707 : || (CONSTRUCTOR_NELTS (stripped_init) > 0
7477 : 546 : && (BRACE_ENCLOSED_INITIALIZER_P
7478 : : (CONSTRUCTOR_ELT (stripped_init,0)->value))))
7479 : : {
7480 : 13 : if (complain & tf_error)
7481 : 13 : error ("too many braces around scalar initializer "
7482 : : "for type %qT", type);
7483 : 13 : init = error_mark_node;
7484 : : }
7485 : : }
7486 : : else
7487 : 283191 : maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
7488 : : }
7489 : 16851946 : return consume_init (init, d);
7490 : : }
7491 : :
7492 : : /* "If T is a class type and the initializer list has a single element of
7493 : : type cv U, where U is T or a class derived from T, the object is
7494 : : initialized from that element." Even if T is an aggregate. */
7495 : 5369487 : if (cxx_dialect >= cxx11 && (CLASS_TYPE_P (type) || VECTOR_TYPE_P (type))
7496 : 4937566 : && first_initializer_p
7497 : : /* But not if it's a designated init. */
7498 : 3239122 : && !d->cur->index
7499 : 3022106 : && d->end - d->cur == 1
7500 : 395096 : && TREE_CODE (init) != RAW_DATA_CST
7501 : 5786540 : && reference_related_p (type, TREE_TYPE (init)))
7502 : : {
7503 : 413 : d->cur++;
7504 : 413 : return init;
7505 : : }
7506 : :
7507 : : /* [dcl.init.aggr]
7508 : :
7509 : : All implicit type conversions (clause _conv_) are considered when
7510 : : initializing the aggregate member with an initializer from an
7511 : : initializer-list. If the initializer can initialize a member,
7512 : : the member is initialized. Otherwise, if the member is itself a
7513 : : non-empty subaggregate, brace elision is assumed and the
7514 : : initializer is considered for the initialization of the first
7515 : : member of the subaggregate. */
7516 : 2347462 : if ((TREE_CODE (init) != CONSTRUCTOR || COMPOUND_LITERAL_P (init))
7517 : : /* But don't try this for the first initializer, since that would be
7518 : : looking through the outermost braces; A a2 = { a1 }; is not a
7519 : : valid aggregate initialization. */
7520 : 3043629 : && !first_initializer_p
7521 : 5398583 : && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
7522 : 4474 : || can_convert_arg (type, TREE_TYPE (init),
7523 : 4474 : TREE_CODE (init) == RAW_DATA_CST
7524 : 46 : ? build_int_cst (integer_type_node,
7525 : : *(const unsigned char *)
7526 : 46 : RAW_DATA_POINTER (init))
7527 : : : init,
7528 : : LOOKUP_NORMAL, complain)))
7529 : 3116 : return consume_init (init, d);
7530 : :
7531 : : /* [dcl.init.string]
7532 : :
7533 : : A char array (whether plain char, signed char, or unsigned char)
7534 : : can be initialized by a string-literal (optionally enclosed in
7535 : : braces); a wchar_t array can be initialized by a wide
7536 : : string-literal (optionally enclosed in braces). */
7537 : 5387915 : if (TREE_CODE (type) == ARRAY_TYPE
7538 : 5387915 : && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
7539 : : {
7540 : 80064 : tree str_init = init;
7541 : 80064 : tree stripped_str_init = stripped_init;
7542 : 80064 : reshape_iter stripd = {};
7543 : :
7544 : : /* Strip one level of braces if and only if they enclose a single
7545 : : element (as allowed by [dcl.init.string]). */
7546 : 80064 : if (!first_initializer_p
7547 : 11879 : && TREE_CODE (stripped_str_init) == CONSTRUCTOR
7548 : 90940 : && CONSTRUCTOR_NELTS (stripped_str_init) == 1)
7549 : : {
7550 : 375 : stripd.cur = CONSTRUCTOR_ELT (stripped_str_init, 0);
7551 : 375 : str_init = stripd.cur->value;
7552 : 375 : stripped_str_init = tree_strip_any_location_wrapper (str_init);
7553 : : }
7554 : :
7555 : : /* If it's a string literal, then it's the initializer for the array
7556 : : as a whole. Otherwise, continue with normal initialization for
7557 : : array types (one value per array element). */
7558 : 80064 : if (TREE_CODE (stripped_str_init) == STRING_CST)
7559 : : {
7560 : 72 : if ((first_initializer_p && has_designator_problem (d, complain))
7561 : 1013 : || (stripd.cur && has_designator_problem (&stripd, complain)))
7562 : 941 : return error_mark_node;
7563 : 941 : d->cur++;
7564 : 941 : return str_init;
7565 : : }
7566 : : }
7567 : :
7568 : : /* The following cases are about aggregates. If we are not within a full
7569 : : initializer already, and there is not a CONSTRUCTOR, it means that there
7570 : : is a missing set of braces (that is, we are processing the case for
7571 : : which reshape_init exists). */
7572 : 5386974 : bool braces_elided_p = false;
7573 : 5386974 : if (!first_initializer_p)
7574 : : {
7575 : 1826876 : if (TREE_CODE (stripped_init) == CONSTRUCTOR)
7576 : : {
7577 : 1823257 : tree init_type = TREE_TYPE (init);
7578 : 1823257 : if (init_type && TYPE_PTRMEMFUNC_P (init_type))
7579 : : /* There is no need to call reshape_init for pointer-to-member
7580 : : function initializers, as they are always constructed correctly
7581 : : by the front end. Here we have e.g. {.__pfn=0B, .__delta=0},
7582 : : which is missing outermost braces. We should warn below, and
7583 : : one of the routines below will wrap it in additional { }. */;
7584 : : /* For a nested compound literal, proceed to specialized routines,
7585 : : to handle initialization of arrays and similar. */
7586 : 1823248 : else if (COMPOUND_LITERAL_P (stripped_init))
7587 : 6 : gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (stripped_init));
7588 : : /* If we have an unresolved designator, we need to find the member it
7589 : : designates within TYPE, so proceed to the routines below. For
7590 : : FIELD_DECL or INTEGER_CST designators, we're already initializing
7591 : : the designated element. */
7592 : 1823242 : else if (d->cur->index
7593 : 27 : && TREE_CODE (d->cur->index) == IDENTIFIER_NODE)
7594 : : /* Brace elision with designators is only permitted for anonymous
7595 : : aggregates. */
7596 : 15 : gcc_checking_assert (ANON_AGGR_TYPE_P (type));
7597 : : /* A CONSTRUCTOR of the target's type is a previously
7598 : : digested initializer. */
7599 : 1823227 : else if (same_type_ignoring_top_level_qualifiers_p (type, init_type))
7600 : : {
7601 : 0 : ++d->cur;
7602 : 0 : return init;
7603 : : }
7604 : : else
7605 : : {
7606 : : /* Something that hasn't been reshaped yet. */
7607 : 1823227 : ++d->cur;
7608 : 1823227 : gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (stripped_init));
7609 : 1823227 : return reshape_init (type, init, complain);
7610 : : }
7611 : : }
7612 : :
7613 : 3649 : if (complain & tf_warning)
7614 : 3314 : warning (OPT_Wmissing_braces,
7615 : : "missing braces around initializer for %qT",
7616 : : type);
7617 : : braces_elided_p = true;
7618 : : }
7619 : :
7620 : : /* Dispatch to specialized routines. */
7621 : 3563747 : tree new_init;
7622 : 3563747 : if (CLASS_TYPE_P (type))
7623 : 3211858 : new_init = reshape_init_class (type, d, first_initializer_p, complain);
7624 : 351889 : else if (TREE_CODE (type) == ARRAY_TYPE)
7625 : 311076 : new_init = reshape_init_array (type, d, first_initializer_p, complain);
7626 : 40813 : else if (VECTOR_TYPE_P (type))
7627 : 40813 : new_init = reshape_init_vector (type, d, complain);
7628 : : else
7629 : 0 : gcc_unreachable ();
7630 : :
7631 : 3563747 : if (braces_elided_p
7632 : 3649 : && TREE_CODE (new_init) == CONSTRUCTOR)
7633 : 3373 : CONSTRUCTOR_BRACES_ELIDED_P (new_init) = true;
7634 : :
7635 : : return new_init;
7636 : : }
7637 : :
7638 : : /* Undo the brace-elision allowed by [dcl.init.aggr] in a
7639 : : brace-enclosed aggregate initializer.
7640 : :
7641 : : INIT is the CONSTRUCTOR containing the list of initializers describing
7642 : : a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
7643 : : It may not presently match the shape of the TYPE; for example:
7644 : :
7645 : : struct S { int a; int b; };
7646 : : struct S a[] = { 1, 2, 3, 4 };
7647 : :
7648 : : Here INIT will hold a vector of four elements, rather than a
7649 : : vector of two elements, each itself a vector of two elements. This
7650 : : routine transforms INIT from the former form into the latter. The
7651 : : revised CONSTRUCTOR node is returned. */
7652 : :
7653 : : tree
7654 : 8494854 : reshape_init (tree type, tree init, tsubst_flags_t complain)
7655 : : {
7656 : 8494854 : vec<constructor_elt, va_gc> *v;
7657 : 8494854 : reshape_iter d;
7658 : 8494854 : tree new_init;
7659 : :
7660 : 8494854 : gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
7661 : :
7662 : 8494854 : v = CONSTRUCTOR_ELTS (init);
7663 : :
7664 : : /* An empty constructor does not need reshaping, and it is always a valid
7665 : : initializer. */
7666 : 8495357 : if (vec_safe_is_empty (v))
7667 : : return init;
7668 : :
7669 : 3615379 : if ((*v)[0].index && TREE_CODE ((*v)[0].index) == FIELD_DECL)
7670 : : /* Already reshaped. */
7671 : : return init;
7672 : :
7673 : : /* Brace elision is not performed for a CONSTRUCTOR representing
7674 : : parenthesized aggregate initialization. */
7675 : 3615245 : if (CONSTRUCTOR_IS_PAREN_INIT (init))
7676 : : {
7677 : 398 : tree elt = (*v)[0].value;
7678 : : /* If we're initializing a char array from a string-literal that is
7679 : : enclosed in braces, unwrap it here. */
7680 : 398 : if (TREE_CODE (type) == ARRAY_TYPE
7681 : 221 : && vec_safe_length (v) == 1
7682 : 121 : && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
7683 : 431 : && TREE_CODE (tree_strip_any_location_wrapper (elt)) == STRING_CST)
7684 : : return elt;
7685 : 369 : return init;
7686 : : }
7687 : :
7688 : : /* Handle [dcl.init.list] direct-list-initialization from
7689 : : single element of enumeration with a fixed underlying type. */
7690 : 3614847 : if (is_direct_enum_init (type, init))
7691 : : {
7692 : 176 : tree elt = CONSTRUCTOR_ELT (init, 0)->value;
7693 : 176 : type = cv_unqualified (type);
7694 : 176 : if (check_narrowing (ENUM_UNDERLYING_TYPE (type), elt, complain))
7695 : : {
7696 : 161 : warning_sentinel w (warn_useless_cast);
7697 : 161 : warning_sentinel w2 (warn_ignored_qualifiers);
7698 : 161 : return cp_build_c_cast (input_location, type, elt,
7699 : : tf_warning_or_error);
7700 : 161 : }
7701 : : else
7702 : 15 : return error_mark_node;
7703 : : }
7704 : :
7705 : : /* Recurse on this CONSTRUCTOR. */
7706 : 3614671 : d.cur = &(*v)[0];
7707 : 3614671 : d.end = d.cur + v->length ();
7708 : :
7709 : 3614671 : new_init = reshape_init_r (type, &d, init, complain);
7710 : 3614671 : if (new_init == error_mark_node)
7711 : : return error_mark_node;
7712 : :
7713 : : /* Make sure all the element of the constructor were used. Otherwise,
7714 : : issue an error about exceeding initializers. */
7715 : 3614052 : if (d.cur != d.end)
7716 : : {
7717 : 134 : if (complain & tf_error)
7718 : 63 : error ("too many initializers for %qT", type);
7719 : 134 : return error_mark_node;
7720 : : }
7721 : :
7722 : 3613918 : if (CONSTRUCTOR_IS_DIRECT_INIT (init)
7723 : 3613918 : && BRACE_ENCLOSED_INITIALIZER_P (new_init))
7724 : 393158 : CONSTRUCTOR_IS_DIRECT_INIT (new_init) = true;
7725 : 3613918 : if (CONSTRUCTOR_IS_DESIGNATED_INIT (init)
7726 : 3613918 : && BRACE_ENCLOSED_INITIALIZER_P (new_init))
7727 : 28383 : gcc_checking_assert (CONSTRUCTOR_IS_DESIGNATED_INIT (new_init)
7728 : : || seen_error ());
7729 : :
7730 : : return new_init;
7731 : : }
7732 : :
7733 : : /* Verify array initializer. Returns true if errors have been reported. */
7734 : :
7735 : : bool
7736 : 791088 : check_array_initializer (tree decl, tree type, tree init)
7737 : : {
7738 : 791088 : tree element_type = TREE_TYPE (type);
7739 : :
7740 : : /* Structured binding when initialized with an array type needs
7741 : : to have complete type. */
7742 : 791088 : if (decl
7743 : 787303 : && DECL_DECOMPOSITION_P (decl)
7744 : 239 : && DECL_DECOMP_IS_BASE (decl)
7745 : 791327 : && !COMPLETE_TYPE_P (type))
7746 : : {
7747 : 0 : error_at (DECL_SOURCE_LOCATION (decl),
7748 : : "structured binding has incomplete type %qT", type);
7749 : 0 : TREE_TYPE (decl) = error_mark_node;
7750 : 0 : return true;
7751 : : }
7752 : :
7753 : : /* The array type itself need not be complete, because the
7754 : : initializer may tell us how many elements are in the array.
7755 : : But, the elements of the array must be complete. */
7756 : 791088 : if (!COMPLETE_TYPE_P (complete_type (element_type)))
7757 : : {
7758 : 15 : if (decl)
7759 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
7760 : : "elements of array %q#D have incomplete type", decl);
7761 : : else
7762 : 6 : error ("elements of array %q#T have incomplete type", type);
7763 : 15 : return true;
7764 : : }
7765 : :
7766 : 791073 : location_t loc = (decl ? location_of (decl) : input_location);
7767 : 791073 : if (!verify_type_context (loc, TCTX_ARRAY_ELEMENT, element_type))
7768 : : return true;
7769 : :
7770 : : /* A compound literal can't have variable size. */
7771 : 791073 : if (init && !decl
7772 : 791073 : && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
7773 : 3776 : || !TREE_CONSTANT (TYPE_SIZE (element_type))))
7774 : : {
7775 : 3 : error ("variable-sized compound literal");
7776 : 3 : return true;
7777 : : }
7778 : : return false;
7779 : : }
7780 : :
7781 : : /* Subroutine of check_initializer; args are passed down from that function.
7782 : : Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
7783 : :
7784 : : static tree
7785 : 1996341 : build_aggr_init_full_exprs (tree decl, tree init, int flags)
7786 : : {
7787 : 1996341 : gcc_assert (stmts_are_full_exprs_p ());
7788 : 1996341 : if (init)
7789 : 1427626 : maybe_warn_pessimizing_move (init, TREE_TYPE (decl), /*return_p*/false);
7790 : 1996341 : return build_aggr_init (decl, init, flags, tf_warning_or_error);
7791 : : }
7792 : :
7793 : : /* Verify INIT (the initializer for DECL), and record the
7794 : : initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
7795 : : grok_reference_init.
7796 : :
7797 : : If the return value is non-NULL, it is an expression that must be
7798 : : evaluated dynamically to initialize DECL. */
7799 : :
7800 : : static tree
7801 : 37846489 : check_initializer (tree decl, tree init, int flags, vec<tree, va_gc> **cleanups)
7802 : : {
7803 : 37846489 : tree type;
7804 : 37846489 : tree init_code = NULL;
7805 : 37846489 : tree core_type;
7806 : :
7807 : : /* Things that are going to be initialized need to have complete
7808 : : type. */
7809 : 37846489 : TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
7810 : :
7811 : 37846489 : if (DECL_HAS_VALUE_EXPR_P (decl))
7812 : : {
7813 : : /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
7814 : : it doesn't have storage to be initialized. */
7815 : 138 : gcc_assert (init == NULL_TREE);
7816 : : return NULL_TREE;
7817 : : }
7818 : :
7819 : 37846351 : if (type == error_mark_node)
7820 : : /* We will have already complained. */
7821 : : return NULL_TREE;
7822 : :
7823 : 37846351 : if (TREE_CODE (type) == ARRAY_TYPE)
7824 : : {
7825 : 787303 : if (check_array_initializer (decl, type, init))
7826 : : return NULL_TREE;
7827 : : }
7828 : 37059048 : else if (!COMPLETE_TYPE_P (type))
7829 : : {
7830 : 37 : error_at (DECL_SOURCE_LOCATION (decl),
7831 : : "%q#D has incomplete type", decl);
7832 : 37 : TREE_TYPE (decl) = error_mark_node;
7833 : 37 : return NULL_TREE;
7834 : : }
7835 : : else
7836 : : /* There is no way to make a variable-sized class type in GNU C++. */
7837 : 37059011 : gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
7838 : :
7839 : 37846305 : if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
7840 : : {
7841 : 1307280 : int init_len = CONSTRUCTOR_NELTS (init);
7842 : 1307280 : if (SCALAR_TYPE_P (type))
7843 : : {
7844 : 45079 : if (init_len == 0)
7845 : : {
7846 : 39008 : maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
7847 : 39008 : init = build_zero_init (type, NULL_TREE, false);
7848 : : }
7849 : 6071 : else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
7850 : : {
7851 : 12 : error_at (cp_expr_loc_or_loc (init, DECL_SOURCE_LOCATION (decl)),
7852 : : "scalar object %qD requires one element in "
7853 : : "initializer", decl);
7854 : 6 : TREE_TYPE (decl) = error_mark_node;
7855 : 6 : return NULL_TREE;
7856 : : }
7857 : : }
7858 : : }
7859 : :
7860 : 37846299 : if (TREE_CODE (decl) == CONST_DECL)
7861 : : {
7862 : 0 : gcc_assert (!TYPE_REF_P (type));
7863 : :
7864 : 0 : DECL_INITIAL (decl) = init;
7865 : :
7866 : 0 : gcc_assert (init != NULL_TREE);
7867 : : init = NULL_TREE;
7868 : : }
7869 : 37846299 : else if (!init && DECL_REALLY_EXTERN (decl))
7870 : : ;
7871 : 4074273 : else if (init || type_build_ctor_call (type)
7872 : 41351854 : || TYPE_REF_P (type))
7873 : : {
7874 : 34340759 : if (TYPE_REF_P (type))
7875 : : {
7876 : 285386 : init = grok_reference_init (decl, type, init, flags);
7877 : 285386 : flags |= LOOKUP_ALREADY_DIGESTED;
7878 : : }
7879 : 34055373 : else if (!init)
7880 : 568718 : check_for_uninitialized_const_var (decl, /*constexpr_context_p=*/false,
7881 : : tf_warning_or_error);
7882 : : /* Do not reshape constructors of vectors (they don't need to be
7883 : : reshaped. */
7884 : 33486655 : else if (BRACE_ENCLOSED_INITIALIZER_P (init))
7885 : : {
7886 : 1267963 : if (is_std_init_list (type))
7887 : : {
7888 : 302 : init = perform_implicit_conversion (type, init,
7889 : : tf_warning_or_error);
7890 : 302 : flags |= LOOKUP_ALREADY_DIGESTED;
7891 : : }
7892 : 1267661 : else if (TYPE_NON_AGGREGATE_CLASS (type))
7893 : : {
7894 : : /* Don't reshape if the class has constructors. */
7895 : 177050 : if (cxx_dialect == cxx98)
7896 : 6 : error_at (cp_expr_loc_or_loc (init, DECL_SOURCE_LOCATION (decl)),
7897 : : "in C++98 %qD must be initialized by "
7898 : : "constructor, not by %<{...}%>",
7899 : : decl);
7900 : : }
7901 : 1090611 : else if (VECTOR_TYPE_P (type) && TYPE_VECTOR_OPAQUE (type))
7902 : : {
7903 : 0 : error ("opaque vector types cannot be initialized");
7904 : 0 : init = error_mark_node;
7905 : : }
7906 : : else
7907 : : {
7908 : 1090611 : init = reshape_init (type, init, tf_warning_or_error);
7909 : 1090611 : flags |= LOOKUP_NO_NARROWING;
7910 : : }
7911 : : }
7912 : : /* [dcl.init] "Otherwise, if the destination type is an array, the object
7913 : : is initialized as follows..." So handle things like
7914 : :
7915 : : int a[](1, 2, 3);
7916 : :
7917 : : which is permitted in C++20 by P0960. */
7918 : 32218692 : else if (TREE_CODE (init) == TREE_LIST
7919 : 534165 : && TREE_TYPE (init) == NULL_TREE
7920 : 534165 : && TREE_CODE (type) == ARRAY_TYPE
7921 : 165 : && !DECL_DECOMPOSITION_P (decl)
7922 : 32218836 : && (cxx_dialect >= cxx20))
7923 : 124 : init = do_aggregate_paren_init (init, type);
7924 : 32218568 : else if (TREE_CODE (init) == TREE_LIST
7925 : 534041 : && TREE_TYPE (init) != unknown_type_node
7926 : 32752609 : && !MAYBE_CLASS_TYPE_P (type))
7927 : : {
7928 : 129281 : gcc_assert (TREE_CODE (decl) != RESULT_DECL);
7929 : :
7930 : : /* We get here with code like `int a (2);' */
7931 : 129281 : init = build_x_compound_expr_from_list (init, ELK_INIT,
7932 : : tf_warning_or_error);
7933 : : }
7934 : :
7935 : : /* If DECL has an array type without a specific bound, deduce the
7936 : : array size from the initializer. */
7937 : 34340759 : maybe_deduce_size_from_array_init (decl, init);
7938 : 34340759 : type = TREE_TYPE (decl);
7939 : 34340759 : if (type == error_mark_node)
7940 : : return NULL_TREE;
7941 : :
7942 : 66282170 : if (((type_build_ctor_call (type) || CLASS_TYPE_P (type))
7943 : 2942253 : && !(flags & LOOKUP_ALREADY_DIGESTED)
7944 : 2941951 : && !(init && BRACE_ENCLOSED_INITIALIZER_P (init)
7945 : 1123988 : && CP_AGGREGATE_TYPE_P (type)
7946 : 946938 : && (CLASS_TYPE_P (type)
7947 : : /* The call to build_aggr_init below could end up
7948 : : calling build_vec_init, which may break when we
7949 : : are processing a template. */
7950 : 1259 : || processing_template_decl
7951 : 1196 : || !TYPE_NEEDS_CONSTRUCTING (type)
7952 : 1164 : || type_has_extended_temps (type))))
7953 : 66685367 : || (DECL_DECOMPOSITION_P (decl) && TREE_CODE (type) == ARRAY_TYPE))
7954 : : {
7955 : 1996341 : init_code = build_aggr_init_full_exprs (decl, init, flags);
7956 : :
7957 : : /* A constructor call is a non-trivial initializer even if
7958 : : it isn't explicitly written. */
7959 : 1996341 : if (TREE_SIDE_EFFECTS (init_code))
7960 : 1988068 : DECL_NONTRIVIALLY_INITIALIZED_P (decl) = true;
7961 : :
7962 : : /* If this is a constexpr initializer, expand_default_init will
7963 : : have returned an INIT_EXPR rather than a CALL_EXPR. In that
7964 : : case, pull the initializer back out and pass it down into
7965 : : store_init_value. */
7966 : 5151622 : while (true)
7967 : : {
7968 : 5151622 : if (TREE_CODE (init_code) == EXPR_STMT
7969 : 3167803 : || TREE_CODE (init_code) == STMT_EXPR
7970 : 3159521 : || TREE_CODE (init_code) == CONVERT_EXPR)
7971 : 3147032 : init_code = TREE_OPERAND (init_code, 0);
7972 : 2004590 : else if (TREE_CODE (init_code) == BIND_EXPR)
7973 : 8249 : init_code = BIND_EXPR_BODY (init_code);
7974 : : else
7975 : : break;
7976 : : }
7977 : 1996341 : if (TREE_CODE (init_code) == INIT_EXPR)
7978 : : {
7979 : : /* In C++20, the call to build_aggr_init could have created
7980 : : an INIT_EXPR with a CONSTRUCTOR as the RHS to handle
7981 : : A(1, 2). */
7982 : 1161977 : tree rhs = TREE_OPERAND (init_code, 1);
7983 : 1161977 : if (processing_template_decl && TREE_CODE (rhs) == TARGET_EXPR)
7984 : : /* Avoid leaking TARGET_EXPR into template trees. */
7985 : 4139 : rhs = build_implicit_conv_flags (type, init, flags);
7986 : 1161977 : init = rhs;
7987 : :
7988 : 1161977 : init_code = NULL_TREE;
7989 : : /* Don't call digest_init; it's unnecessary and will complain
7990 : : about aggregate initialization of non-aggregate classes. */
7991 : 1161974 : flags |= LOOKUP_ALREADY_DIGESTED;
7992 : : }
7993 : 834364 : else if (DECL_DECLARED_CONSTEXPR_P (decl)
7994 : 1664233 : || DECL_DECLARED_CONSTINIT_P (decl))
7995 : : {
7996 : : /* Declared constexpr or constinit, but no suitable initializer;
7997 : : massage init appropriately so we can pass it into
7998 : : store_init_value for the error. */
7999 : 4510 : tree new_init = NULL_TREE;
8000 : 4510 : if (!processing_template_decl
8001 : 370 : && TREE_CODE (init_code) == CALL_EXPR)
8002 : 320 : new_init = build_cplus_new (type, init_code, tf_none);
8003 : 4166 : else if (CLASS_TYPE_P (type)
8004 : 8356 : && (!init || TREE_CODE (init) == TREE_LIST))
8005 : 4119 : new_init = build_functional_cast (input_location, type,
8006 : : init, tf_none);
8007 : 4439 : if (new_init)
8008 : : {
8009 : 4439 : init = new_init;
8010 : 4439 : if (TREE_CODE (init) == TARGET_EXPR
8011 : 335 : && !(flags & LOOKUP_ONLYCONVERTING))
8012 : 335 : TARGET_EXPR_DIRECT_INIT_P (init) = true;
8013 : : }
8014 : : init_code = NULL_TREE;
8015 : : }
8016 : : else
8017 : : init = NULL_TREE;
8018 : : }
8019 : :
8020 : 33510900 : if (init && TREE_CODE (init) != TREE_VEC)
8021 : : {
8022 : 33510885 : init_code = store_init_value (decl, init, cleanups, flags);
8023 : :
8024 : 33508188 : if (DECL_INITIAL (decl)
8025 : 21273268 : && TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR
8026 : 34948047 : && !vec_safe_is_empty (CONSTRUCTOR_ELTS (DECL_INITIAL (decl))))
8027 : : {
8028 : 880938 : tree elt = CONSTRUCTOR_ELTS (DECL_INITIAL (decl))->last ().value;
8029 : 880938 : if (TREE_CODE (TREE_TYPE (elt)) == ARRAY_TYPE
8030 : 880938 : && TYPE_SIZE (TREE_TYPE (elt)) == NULL_TREE)
8031 : 36 : cp_complete_array_type (&TREE_TYPE (elt), elt, false);
8032 : : }
8033 : :
8034 : 719636 : if (pedantic && TREE_CODE (type) == ARRAY_TYPE
8035 : 46052 : && DECL_INITIAL (decl)
8036 : 45771 : && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
8037 : 33551131 : && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
8038 : 6 : warning_at (cp_expr_loc_or_loc (DECL_INITIAL (decl),
8039 : 3 : DECL_SOURCE_LOCATION (decl)),
8040 : : 0, "array %qD initialized by parenthesized "
8041 : : "string literal %qE",
8042 : 3 : decl, DECL_INITIAL (decl));
8043 : : init = NULL_TREE;
8044 : : }
8045 : : }
8046 : : else
8047 : : {
8048 : 7011080 : if (CLASS_TYPE_P (core_type = strip_array_types (type))
8049 : 4124617 : && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
8050 : 619064 : || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
8051 : 19 : diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
8052 : : /*complain=*/true);
8053 : :
8054 : 3505540 : check_for_uninitialized_const_var (decl, /*constexpr_context_p=*/false,
8055 : : tf_warning_or_error);
8056 : : }
8057 : :
8058 : 0 : if (init && init != error_mark_node)
8059 : 0 : init_code = cp_build_init_expr (decl, init);
8060 : :
8061 : 13172036 : if (init_code && !TREE_SIDE_EFFECTS (init_code)
8062 : 37859784 : && init_code != error_mark_node)
8063 : : init_code = NULL_TREE;
8064 : :
8065 : 37829603 : if (init_code)
8066 : : {
8067 : : /* We might have set these in cp_finish_decl. */
8068 : 13158042 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = false;
8069 : 13158042 : TREE_CONSTANT (decl) = false;
8070 : : }
8071 : :
8072 : 13158042 : if (init_code
8073 : 13158042 : && DECL_IN_AGGR_P (decl)
8074 : 6 : && DECL_INITIALIZED_IN_CLASS_P (decl))
8075 : : {
8076 : 0 : static int explained = 0;
8077 : :
8078 : 0 : auto_diagnostic_group d;
8079 : 0 : if (cxx_dialect < cxx11)
8080 : 0 : error ("initializer invalid for static member with constructor");
8081 : 0 : else if (cxx_dialect < cxx17)
8082 : 0 : error ("non-constant in-class initialization invalid for static "
8083 : : "member %qD", decl);
8084 : : else
8085 : 0 : error ("non-constant in-class initialization invalid for non-inline "
8086 : : "static member %qD", decl);
8087 : 0 : if (!explained)
8088 : : {
8089 : 0 : inform (input_location,
8090 : : "(an out of class initialization is required)");
8091 : 0 : explained = 1;
8092 : : }
8093 : 0 : return NULL_TREE;
8094 : 0 : }
8095 : :
8096 : : return init_code;
8097 : : }
8098 : :
8099 : : /* If DECL is not a local variable, give it RTL. */
8100 : :
8101 : : static void
8102 : 93393811 : make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
8103 : : {
8104 : 93393811 : int toplev = toplevel_bindings_p ();
8105 : 93393811 : int defer_p;
8106 : :
8107 : : /* Set the DECL_ASSEMBLER_NAME for the object. */
8108 : 93393811 : if (asmspec)
8109 : : {
8110 : : /* The `register' keyword, when used together with an
8111 : : asm-specification, indicates that the variable should be
8112 : : placed in a particular register. */
8113 : 938847 : if (VAR_P (decl) && DECL_REGISTER (decl))
8114 : : {
8115 : 78 : set_user_assembler_name (decl, asmspec);
8116 : 78 : DECL_HARD_REGISTER (decl) = 1;
8117 : : }
8118 : : else
8119 : : {
8120 : 938769 : if (TREE_CODE (decl) == FUNCTION_DECL
8121 : 938769 : && fndecl_built_in_p (decl, BUILT_IN_NORMAL))
8122 : 74262 : set_builtin_user_assembler_name (decl, asmspec);
8123 : 938769 : set_user_assembler_name (decl, asmspec);
8124 : 938769 : if (DECL_LOCAL_DECL_P (decl))
8125 : 6 : if (auto ns_decl = DECL_LOCAL_DECL_ALIAS (decl))
8126 : : /* We have to propagate the name to the ns-alias.
8127 : : This is horrible, as we're affecting a
8128 : : possibly-shared decl. Again, a one-true-decl
8129 : : model breaks down. */
8130 : 6 : if (ns_decl != error_mark_node)
8131 : 6 : set_user_assembler_name (ns_decl, asmspec);
8132 : : }
8133 : : }
8134 : :
8135 : : /* Handle non-variables up front. */
8136 : 93393811 : if (!VAR_P (decl))
8137 : : {
8138 : 50125376 : rest_of_decl_compilation (decl, toplev, at_eof);
8139 : 50125376 : return;
8140 : : }
8141 : :
8142 : : /* If we see a class member here, it should be a static data
8143 : : member. */
8144 : 43268435 : if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
8145 : : {
8146 : 3818037 : gcc_assert (TREE_STATIC (decl));
8147 : : /* An in-class declaration of a static data member should be
8148 : : external; it is only a declaration, and not a definition. */
8149 : 3818037 : if (init == NULL_TREE)
8150 : 3818028 : gcc_assert (DECL_EXTERNAL (decl)
8151 : : || !TREE_PUBLIC (decl));
8152 : : }
8153 : :
8154 : : /* We don't create any RTL for local variables. */
8155 : 43268435 : if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
8156 : : return;
8157 : :
8158 : : /* We defer emission of local statics until the corresponding
8159 : : DECL_EXPR is expanded. But with constexpr its function might never
8160 : : be expanded, so go ahead and tell cgraph about the variable now. */
8161 : 43194472 : defer_p = ((DECL_FUNCTION_SCOPE_P (decl)
8162 : 128195 : && !var_in_maybe_constexpr_fn (decl))
8163 : 43066383 : || DECL_VIRTUAL_P (decl));
8164 : :
8165 : : /* Defer template instantiations. */
8166 : 21597236 : if (DECL_LANG_SPECIFIC (decl)
8167 : 21597236 : && DECL_IMPLICIT_INSTANTIATION (decl))
8168 : : defer_p = 1;
8169 : :
8170 : : /* If we're not deferring, go ahead and assemble the variable. */
8171 : 14356131 : if (!defer_p)
8172 : 12146070 : rest_of_decl_compilation (decl, toplev, at_eof);
8173 : : }
8174 : :
8175 : : /* walk_tree helper for wrap_temporary_cleanups, below. */
8176 : :
8177 : : static tree
8178 : 8991856 : wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
8179 : : {
8180 : : /* Stop at types or full-expression boundaries. */
8181 : 8991856 : if (TYPE_P (*stmt_p)
8182 : 8991818 : || TREE_CODE (*stmt_p) == CLEANUP_POINT_EXPR)
8183 : : {
8184 : 235 : *walk_subtrees = 0;
8185 : 235 : return NULL_TREE;
8186 : : }
8187 : :
8188 : 8991621 : if (TREE_CODE (*stmt_p) == TARGET_EXPR)
8189 : : {
8190 : 107938 : tree guard = (tree)data;
8191 : 107938 : tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
8192 : :
8193 : 64849 : if (tcleanup && !CLEANUP_EH_ONLY (*stmt_p)
8194 : 162917 : && !expr_noexcept_p (tcleanup, tf_none))
8195 : : {
8196 : 105 : tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
8197 : : /* Tell honor_protect_cleanup_actions to handle this as a separate
8198 : : cleanup. */
8199 : 105 : TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
8200 : 105 : TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
8201 : : }
8202 : : }
8203 : :
8204 : : return NULL_TREE;
8205 : : }
8206 : :
8207 : : /* We're initializing a local variable which has a cleanup GUARD. If there
8208 : : are any temporaries used in the initializer INIT of this variable, we
8209 : : need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
8210 : : variable will be cleaned up properly if one of them throws.
8211 : :
8212 : : Unfortunately, there's no way to express this properly in terms of
8213 : : nesting, as the regions for the temporaries overlap the region for the
8214 : : variable itself; if there are two temporaries, the variable needs to be
8215 : : the first thing destroyed if either of the temporary destructors throws.
8216 : : However, we only want to run the variable's cleanup if it actually got
8217 : : constructed. So we need to guard the temporary cleanups with the
8218 : : variable's cleanup if they are run on the normal path, but not if they
8219 : : are run on the exceptional path. We implement this by telling
8220 : : honor_protect_cleanup_actions to strip the variable cleanup from the
8221 : : exceptional path.
8222 : :
8223 : : Another approach could be to make the variable cleanup region enclose
8224 : : initialization, but depend on a flag to indicate that the variable is
8225 : : initialized; that's effectively what we do for arrays. But the current
8226 : : approach works fine for non-arrays, and has no code overhead in the usual
8227 : : case where the temporary destructors are noexcept. */
8228 : :
8229 : : static void
8230 : 887162 : wrap_temporary_cleanups (tree init, tree guard)
8231 : : {
8232 : 887162 : if (TREE_CODE (guard) == BIND_EXPR)
8233 : : {
8234 : : /* An array cleanup region already encloses any temporary cleanups,
8235 : : don't wrap it around them again. */
8236 : 386 : gcc_checking_assert (BIND_EXPR_VEC_DTOR (guard));
8237 : : return;
8238 : : }
8239 : 886776 : cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
8240 : : }
8241 : :
8242 : : /* Generate code to initialize DECL (a local variable). */
8243 : :
8244 : : static void
8245 : 21671181 : initialize_local_var (tree decl, tree init, bool decomp)
8246 : : {
8247 : 21671181 : tree type = TREE_TYPE (decl);
8248 : 21671181 : tree cleanup;
8249 : 21671181 : int already_used;
8250 : :
8251 : 21671181 : gcc_assert (VAR_P (decl) || TREE_CODE (decl) == RESULT_DECL);
8252 : 21671181 : gcc_assert (!TREE_STATIC (decl));
8253 : :
8254 : 21671181 : if (DECL_SIZE (decl) == NULL_TREE)
8255 : : {
8256 : : /* If we used it already as memory, it must stay in memory. */
8257 : 0 : DECL_INITIAL (decl) = NULL_TREE;
8258 : 0 : TREE_ADDRESSABLE (decl) = TREE_USED (decl);
8259 : 0 : return;
8260 : : }
8261 : :
8262 : 21671181 : if (type == error_mark_node)
8263 : : return;
8264 : :
8265 : : /* Compute and store the initial value. */
8266 : 21671181 : already_used = TREE_USED (decl) || TREE_USED (type);
8267 : 21671181 : if (TREE_USED (type))
8268 : 32 : DECL_READ_P (decl) = 1;
8269 : :
8270 : : /* Generate a cleanup, if necessary. */
8271 : 21671181 : cleanup = (decomp ? NULL_TREE
8272 : 21655074 : : cxx_maybe_build_cleanup (decl, tf_warning_or_error));
8273 : :
8274 : : /* Perform the initialization. */
8275 : 21671181 : if (init)
8276 : : {
8277 : 13145402 : tree rinit = (TREE_CODE (init) == INIT_EXPR
8278 : 13145402 : ? TREE_OPERAND (init, 1) : NULL_TREE);
8279 : 12096272 : if (rinit && !TREE_SIDE_EFFECTS (rinit)
8280 : 18959484 : && TREE_OPERAND (init, 0) == decl)
8281 : : {
8282 : : /* Stick simple initializers in DECL_INITIAL so that
8283 : : -Wno-init-self works (c++/34772). */
8284 : 6863209 : DECL_INITIAL (decl) = rinit;
8285 : :
8286 : 6863209 : if (warn_init_self && TYPE_REF_P (type))
8287 : : {
8288 : 2479 : STRIP_NOPS (rinit);
8289 : 2479 : if (rinit == decl)
8290 : 3 : warning_at (DECL_SOURCE_LOCATION (decl),
8291 : : OPT_Winit_self,
8292 : : "reference %qD is initialized with itself", decl);
8293 : : }
8294 : : }
8295 : : else
8296 : : {
8297 : 6282193 : int saved_stmts_are_full_exprs_p;
8298 : :
8299 : : /* If we're only initializing a single object, guard the
8300 : : destructors of any temporaries used in its initializer with
8301 : : its destructor. */
8302 : 6282193 : if (cleanup)
8303 : 882068 : wrap_temporary_cleanups (init, cleanup);
8304 : :
8305 : 6282193 : gcc_assert (building_stmt_list_p ());
8306 : 6282193 : saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
8307 : : /* Avoid CLEANUP_POINT_EXPR for the structured binding
8308 : : bases, those will have CLEANUP_POINT_EXPR at the end of
8309 : : code emitted by cp_finish_decomp. */
8310 : 6282193 : if (decomp)
8311 : 15904 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
8312 : : /* P2718R0 - avoid CLEANUP_POINT_EXPR for range-for-initializer,
8313 : : temporaries from there should have lifetime extended. */
8314 : 6266289 : else if (DECL_NAME (decl) == for_range__identifier
8315 : 6266289 : && flag_range_for_ext_temps)
8316 : 457 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
8317 : : else
8318 : 6265832 : current_stmt_tree ()->stmts_are_full_exprs_p = 1;
8319 : 6282193 : finish_expr_stmt (init);
8320 : 6282193 : current_stmt_tree ()->stmts_are_full_exprs_p
8321 : 6282193 : = 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 : 21671181 : if (TYPE_NEEDS_CONSTRUCTING (type)
8332 : 1618219 : && ! already_used
8333 : 4250 : && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
8334 : 21675036 : && DECL_NAME (decl))
8335 : 3829 : TREE_USED (decl) = 0;
8336 : 21667352 : else if (already_used)
8337 : 19578081 : TREE_USED (decl) = 1;
8338 : :
8339 : 21671181 : if (cleanup)
8340 : 893974 : 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 : 2042850 : initialize_artificial_var (tree decl, vec<constructor_elt, va_gc> *v)
8350 : : {
8351 : 2042850 : tree init;
8352 : 2042850 : gcc_assert (DECL_ARTIFICIAL (decl));
8353 : 2042850 : init = build_constructor (TREE_TYPE (decl), v);
8354 : 2042850 : gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
8355 : 2042850 : DECL_INITIAL (decl) = init;
8356 : 2042850 : DECL_INITIALIZED_P (decl) = 1;
8357 : : /* Mark the decl as constexpr so that we can access its content
8358 : : at compile time. */
8359 : 2042850 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = true;
8360 : 2042850 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
8361 : 2042850 : determine_visibility (decl);
8362 : 2042850 : layout_var_decl (decl);
8363 : 2042850 : maybe_commonize_var (decl);
8364 : 2042850 : make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
8365 : 2042850 : }
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 : 7473035 : value_dependent_init_p (tree init)
8372 : : {
8373 : 7473035 : if (TREE_CODE (init) == TREE_LIST)
8374 : : /* A parenthesized initializer, e.g.: int i (3, 2); ? */
8375 : 4129 : return any_value_dependent_elements_p (init);
8376 : 7468906 : else if (TREE_CODE (init) == CONSTRUCTOR)
8377 : : /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
8378 : : {
8379 : 35802 : if (dependent_type_p (TREE_TYPE (init)))
8380 : : return true;
8381 : :
8382 : 35796 : vec<constructor_elt, va_gc> *elts;
8383 : 35796 : size_t nelts;
8384 : 35796 : size_t i;
8385 : :
8386 : 35796 : elts = CONSTRUCTOR_ELTS (init);
8387 : 35796 : nelts = vec_safe_length (elts);
8388 : 540003 : for (i = 0; i < nelts; ++i)
8389 : 515696 : 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 : 7433104 : 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 : 30487030 : decl_maybe_constant_destruction (tree decl, tree type)
8417 : : {
8418 : 30487030 : return (TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
8419 : 30487030 : || (cxx_dialect >= cxx20
8420 : 1105858 : && VAR_P (decl)
8421 : 1105533 : && DECL_DECLARED_CONSTEXPR_P (decl)
8422 : 288 : && 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 : 1222 : omp_declare_variant_finalize_one (tree decl, tree attr)
8433 : : {
8434 : 1222 : if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8435 : : {
8436 : 98 : walk_tree (&TREE_VALUE (TREE_VALUE (attr)), declare_simd_adjust_this,
8437 : : DECL_ARGUMENTS (decl), NULL);
8438 : 98 : walk_tree (&TREE_PURPOSE (TREE_VALUE (attr)), declare_simd_adjust_this,
8439 : : DECL_ARGUMENTS (decl), NULL);
8440 : : }
8441 : :
8442 : 1222 : tree ctx = TREE_VALUE (TREE_VALUE (attr));
8443 : 1222 : tree simd = omp_get_context_selector (ctx, OMP_TRAIT_SET_CONSTRUCT,
8444 : : OMP_TRAIT_CONSTRUCT_SIMD);
8445 : 1222 : 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 : 1171 : tree chain = TREE_CHAIN (TREE_VALUE (attr));
8455 : 1171 : location_t varid_loc
8456 : 1171 : = cp_expr_loc_or_input_loc (TREE_PURPOSE (TREE_CHAIN (chain)));
8457 : 1171 : location_t match_loc = cp_expr_loc_or_input_loc (TREE_PURPOSE (chain));
8458 : 1171 : cp_id_kind idk = (cp_id_kind) tree_to_uhwi (TREE_VALUE (chain));
8459 : 1171 : tree variant = TREE_PURPOSE (TREE_VALUE (attr));
8460 : :
8461 : 1171 : location_t save_loc = input_location;
8462 : 1171 : input_location = varid_loc;
8463 : :
8464 : 1171 : releasing_vec args;
8465 : 1171 : tree parm = DECL_ARGUMENTS (decl);
8466 : 1171 : if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
8467 : 98 : parm = DECL_CHAIN (parm);
8468 : 2085 : for (; parm; parm = DECL_CHAIN (parm))
8469 : 914 : if (type_dependent_expression_p (parm))
8470 : 99 : vec_safe_push (args, build_constructor (TREE_TYPE (parm), NULL));
8471 : 815 : else if (MAYBE_CLASS_TYPE_P (TREE_TYPE (parm)))
8472 : 36 : vec_safe_push (args, build_local_temp (TREE_TYPE (parm)));
8473 : : else
8474 : 779 : vec_safe_push (args, build_zero_cst (TREE_TYPE (parm)));
8475 : :
8476 : 1171 : unsigned nappend_args = 0;
8477 : 1171 : tree append_args_list = TREE_CHAIN (TREE_CHAIN (chain));
8478 : 1171 : if (append_args_list)
8479 : : {
8480 : 207 : append_args_list = TREE_VALUE (append_args_list);
8481 : 207 : if (append_args_list)
8482 : 207 : append_args_list = TREE_CHAIN (append_args_list);
8483 : 393 : for (tree t = append_args_list; t; t = TREE_CHAIN (t))
8484 : 186 : nappend_args++;
8485 : 207 : if (nappend_args)
8486 : : {
8487 : 108 : tree type;
8488 : 108 : if ((type = lookup_qualified_name (current_scope (),
8489 : : "omp_interop_t",
8490 : : LOOK_want::NORMAL,
8491 : : /*complain*/false)) == NULL_TREE
8492 : 108 : || !c_omp_interop_t_p (TREE_TYPE (type)))
8493 : : {
8494 : 21 : variant = tree_strip_any_location_wrapper (variant);
8495 : 21 : if (TREE_CODE (variant) == OVERLOAD && OVL_SINGLE_P (variant))
8496 : 21 : variant = OVL_FIRST (variant);
8497 : 21 : error_at (EXPR_LOC_OR_LOC (variant, DECL_SOURCE_LOCATION (variant)),
8498 : : "argument %d of %qE must be of %<omp_interop_t%>",
8499 : 21 : args->length () + 1, variant);
8500 : 21 : inform (OMP_CLAUSE_LOCATION (append_args_list),
8501 : : "%<append_args%> specified here");
8502 : 21 : return true;
8503 : : }
8504 : 240 : for (unsigned i = 0; i < nappend_args; i++)
8505 : 153 : vec_safe_push (args, build_zero_cst (TREE_TYPE (type)));
8506 : : }
8507 : : }
8508 : :
8509 : 1150 : bool koenig_p = false;
8510 : 1150 : if (idk == CP_ID_KIND_UNQUALIFIED || idk == CP_ID_KIND_TEMPLATE_ID)
8511 : : {
8512 : 1144 : if (identifier_p (variant)
8513 : : /* In C++20, we may need to perform ADL for a template
8514 : : name. */
8515 : 1120 : || (TREE_CODE (variant) == TEMPLATE_ID_EXPR
8516 : 18 : && identifier_p (TREE_OPERAND (variant, 0))))
8517 : : {
8518 : 24 : if (!args->is_empty ())
8519 : : {
8520 : 24 : koenig_p = true;
8521 : 24 : if (!any_type_dependent_arguments_p (args))
8522 : 21 : variant = perform_koenig_lookup (variant, args,
8523 : : tf_warning_or_error);
8524 : : }
8525 : : else
8526 : 0 : variant = unqualified_fn_lookup_error (variant);
8527 : : }
8528 : 1120 : else if (!args->is_empty () && is_overloaded_fn (variant))
8529 : : {
8530 : 524 : tree fn = get_first_fn (variant);
8531 : 524 : fn = STRIP_TEMPLATE (fn);
8532 : 524 : if (!((TREE_CODE (fn) == USING_DECL && DECL_DEPENDENT_P (fn))
8533 : 524 : || DECL_FUNCTION_MEMBER_P (fn)
8534 : 432 : || DECL_LOCAL_DECL_P (fn)))
8535 : : {
8536 : 432 : koenig_p = true;
8537 : 432 : if (!any_type_dependent_arguments_p (args))
8538 : 396 : variant = perform_koenig_lookup (variant, args,
8539 : : tf_warning_or_error);
8540 : : }
8541 : : }
8542 : : }
8543 : :
8544 : 1150 : if (idk == CP_ID_KIND_QUALIFIED)
8545 : 6 : variant = finish_call_expr (variant, &args, /*disallow_virtual=*/true,
8546 : : koenig_p, tf_warning_or_error);
8547 : : else
8548 : 1144 : variant = finish_call_expr (variant, &args, /*disallow_virtual=*/false,
8549 : : koenig_p, tf_warning_or_error);
8550 : 1150 : if (variant == error_mark_node && !processing_template_decl)
8551 : : return true;
8552 : :
8553 : 2225 : variant = cp_get_callee_fndecl_nofold (STRIP_REFERENCE_REF (variant));
8554 : 1117 : input_location = save_loc;
8555 : :
8556 : 1117 : if (variant)
8557 : : {
8558 : 1048 : bool fail;
8559 : 1048 : const char *varname = IDENTIFIER_POINTER (DECL_NAME (variant));
8560 : 1048 : if (!nappend_args)
8561 : 988 : fail = !comptypes (TREE_TYPE (decl), TREE_TYPE (variant),
8562 : : COMPARE_STRICT);
8563 : : else
8564 : : {
8565 : 60 : unsigned nbase_args = 0;
8566 : 60 : for (tree t = TYPE_ARG_TYPES (TREE_TYPE (decl));
8567 : 267 : t && TREE_VALUE (t) != void_type_node; t = TREE_CHAIN (t))
8568 : 81 : nbase_args++;
8569 : 60 : tree vargs, varg;
8570 : 60 : vargs = varg = TYPE_ARG_TYPES (TREE_TYPE (variant));
8571 : 141 : for (unsigned i = 0; i < nbase_args && varg;
8572 : 81 : i++, varg = TREE_CHAIN (varg))
8573 : 81 : vargs = varg;
8574 : 168 : for (unsigned i = 0; i < nappend_args && varg; i++)
8575 : 108 : varg = TREE_CHAIN (varg);
8576 : 60 : tree saved_vargs;
8577 : 60 : if (nbase_args)
8578 : : {
8579 : 48 : saved_vargs = TREE_CHAIN (vargs);
8580 : 48 : TREE_CHAIN (vargs) = varg;
8581 : : }
8582 : : else
8583 : : {
8584 : 12 : saved_vargs = vargs;
8585 : 12 : TYPE_ARG_TYPES (TREE_TYPE (variant)) = varg;
8586 : : }
8587 : : /* Skip assert check that TYPE_CANONICAL is the same. */
8588 : 60 : fail = !comptypes (TREE_TYPE (decl), TREE_TYPE (variant),
8589 : : COMPARE_STRUCTURAL);
8590 : 60 : if (nbase_args)
8591 : 48 : TREE_CHAIN (vargs) = saved_vargs;
8592 : : else
8593 : 12 : TYPE_ARG_TYPES (TREE_TYPE (variant)) = saved_vargs;
8594 : 60 : varg = saved_vargs;
8595 : 60 : if (!fail && !processing_template_decl)
8596 : 159 : for (unsigned i = 0; i < nappend_args;
8597 : 99 : i++, varg = TREE_CHAIN (varg))
8598 : 210 : if (!varg || !c_omp_interop_t_p (TREE_VALUE (varg)))
8599 : : {
8600 : 6 : error_at (DECL_SOURCE_LOCATION (variant),
8601 : : "argument %d of %qD must be of %<omp_interop_t%>",
8602 : 6 : nbase_args + i + 1, variant);
8603 : 6 : inform (OMP_CLAUSE_LOCATION (append_args_list),
8604 : : "%<append_args%> specified here");
8605 : 6 : break;
8606 : : }
8607 : : }
8608 : 1048 : if (fail)
8609 : : {
8610 : 63 : error_at (varid_loc, "variant %qD and base %qD have incompatible "
8611 : : "types", variant, decl);
8612 : 63 : return true;
8613 : : }
8614 : 985 : if (fndecl_built_in_p (variant)
8615 : 985 : && (startswith (varname, "__builtin_")
8616 : 0 : || startswith (varname, "__sync_")
8617 : 0 : || startswith (varname, "__atomic_")))
8618 : : {
8619 : 6 : error_at (varid_loc, "variant %qD is a built-in", variant);
8620 : 6 : return true;
8621 : : }
8622 : : else
8623 : : {
8624 : 979 : tree construct
8625 : 979 : = omp_get_context_selector_list (ctx, OMP_TRAIT_SET_CONSTRUCT);
8626 : 979 : omp_mark_declare_variant (match_loc, variant, construct);
8627 : 979 : if (!omp_context_selector_matches (ctx))
8628 : : return true;
8629 : 649 : TREE_PURPOSE (TREE_VALUE (attr)) = variant;
8630 : :
8631 : : // Prepend adjust_args list to variant attributes
8632 : 649 : tree adjust_args_list = TREE_CHAIN (TREE_CHAIN (chain));
8633 : 649 : if (adjust_args_list != NULL_TREE)
8634 : 294 : DECL_ATTRIBUTES (variant) = tree_cons (
8635 : : get_identifier ("omp declare variant variant args"),
8636 : 294 : TREE_VALUE (adjust_args_list), DECL_ATTRIBUTES (variant));
8637 : : }
8638 : : }
8639 : 69 : else if (!processing_template_decl)
8640 : : {
8641 : 0 : error_at (varid_loc, "could not find variant declaration");
8642 : 0 : return true;
8643 : : }
8644 : :
8645 : : return false;
8646 : 1171 : }
8647 : :
8648 : : /* Helper function, finish up "omp declare variant base" attribute
8649 : : now that there is a DECL. ATTR is the first "omp declare variant base"
8650 : : attribute. */
8651 : :
8652 : : void
8653 : 1115 : omp_declare_variant_finalize (tree decl, tree attr)
8654 : : {
8655 : 1115 : size_t attr_len = strlen ("omp declare variant base");
8656 : 1115 : tree *list = &DECL_ATTRIBUTES (decl);
8657 : 1115 : bool remove_all = false;
8658 : 1115 : location_t match_loc = DECL_SOURCE_LOCATION (decl);
8659 : 1115 : if (TREE_CHAIN (TREE_VALUE (attr))
8660 : 1115 : && TREE_PURPOSE (TREE_CHAIN (TREE_VALUE (attr)))
8661 : 2230 : && EXPR_HAS_LOCATION (TREE_PURPOSE (TREE_CHAIN (TREE_VALUE (attr)))))
8662 : 1115 : match_loc = EXPR_LOCATION (TREE_PURPOSE (TREE_CHAIN (TREE_VALUE (attr))));
8663 : 2230 : if (DECL_CONSTRUCTOR_P (decl))
8664 : : {
8665 : 27 : error_at (match_loc, "%<declare variant%> on constructor %qD", decl);
8666 : 27 : remove_all = true;
8667 : : }
8668 : 1088 : else if (DECL_DESTRUCTOR_P (decl))
8669 : : {
8670 : 9 : error_at (match_loc, "%<declare variant%> on destructor %qD", decl);
8671 : 9 : remove_all = true;
8672 : : }
8673 : 1079 : else if (DECL_DEFAULTED_FN (decl))
8674 : : {
8675 : 2 : error_at (match_loc, "%<declare variant%> on defaulted %qD", decl);
8676 : 2 : remove_all = true;
8677 : : }
8678 : 1077 : else if (DECL_DELETED_FN (decl))
8679 : : {
8680 : 2 : error_at (match_loc, "%<declare variant%> on deleted %qD", decl);
8681 : 2 : remove_all = true;
8682 : : }
8683 : 1075 : else if (DECL_VIRTUAL_P (decl))
8684 : : {
8685 : 0 : error_at (match_loc, "%<declare variant%> on virtual %qD", decl);
8686 : 0 : remove_all = true;
8687 : : }
8688 : : /* This loop is like private_lookup_attribute, except that it works
8689 : : with tree * rather than tree, as we might want to remove the
8690 : : attributes that are diagnosed as errorneous. */
8691 : 2389 : while (*list)
8692 : : {
8693 : 1274 : tree attr = get_attribute_name (*list);
8694 : 1274 : size_t ident_len = IDENTIFIER_LENGTH (attr);
8695 : 3266 : if (cmp_attribs ("omp declare variant base", attr_len,
8696 : 1274 : IDENTIFIER_POINTER (attr), ident_len))
8697 : : {
8698 : 1262 : if (remove_all || omp_declare_variant_finalize_one (decl, *list))
8699 : : {
8700 : 544 : *list = TREE_CHAIN (*list);
8701 : 544 : continue;
8702 : : }
8703 : : }
8704 : 730 : list = &TREE_CHAIN (*list);
8705 : : }
8706 : 1115 : }
8707 : :
8708 : : static void cp_maybe_mangle_decomp (tree, cp_decomp *);
8709 : :
8710 : : /* Finish processing of a declaration;
8711 : : install its line number and initial value.
8712 : : If the length of an array type is not known before,
8713 : : it must be determined now, from the initial value, or it is an error.
8714 : :
8715 : : INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
8716 : : true, then INIT is an integral constant expression.
8717 : :
8718 : : FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
8719 : : if the (init) syntax was used.
8720 : :
8721 : : DECOMP is first identifier's DECL and identifier count in a structured
8722 : : bindings, nullptr if not a structured binding. */
8723 : :
8724 : : void
8725 : 259572890 : cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
8726 : : tree asmspec_tree, int flags, cp_decomp *decomp)
8727 : : {
8728 : 259572890 : vec<tree, va_gc> *cleanups = NULL;
8729 : 259572890 : const char *asmspec = NULL;
8730 : 259572890 : int was_readonly = 0;
8731 : 259572890 : bool var_definition_p = false;
8732 : 259572890 : tree auto_node;
8733 : 259572890 : auto_vec<tree> extra_cleanups;
8734 : 259572890 : struct decomp_cleanup {
8735 : : tree decl;
8736 : : cp_decomp *&decomp;
8737 : 259570193 : ~decomp_cleanup ()
8738 : : {
8739 : 259570193 : if (decomp && DECL_DECOMPOSITION_P (decl))
8740 : 63836 : cp_finish_decomp (decl, decomp);
8741 : 259570193 : }
8742 : 259572890 : } decomp_cl = { decl, decomp };
8743 : :
8744 : 259572890 : if (decl == error_mark_node)
8745 : : return;
8746 : 259572865 : else if (! decl)
8747 : : {
8748 : 0 : if (init)
8749 : 0 : error ("assignment (not initialization) in declaration");
8750 : 0 : return;
8751 : : }
8752 : :
8753 : 259572865 : gcc_assert (TREE_CODE (decl) != RESULT_DECL);
8754 : : /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
8755 : 259572865 : gcc_assert (TREE_CODE (decl) != PARM_DECL);
8756 : :
8757 : 259572865 : tree type = TREE_TYPE (decl);
8758 : 259572865 : if (type == error_mark_node)
8759 : : return;
8760 : :
8761 : 259572379 : if (VAR_P (decl) && is_copy_initialization (init))
8762 : 70716090 : flags |= LOOKUP_ONLYCONVERTING;
8763 : :
8764 : : /* Warn about register storage specifiers except when in GNU global
8765 : : or local register variable extension. */
8766 : 259572379 : if (VAR_P (decl) && DECL_REGISTER (decl) && asmspec_tree == NULL_TREE)
8767 : : {
8768 : 1922 : if (cxx_dialect >= cxx17)
8769 : 1276 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
8770 : : "ISO C++17 does not allow %<register%> storage "
8771 : : "class specifier");
8772 : : else
8773 : 646 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
8774 : : "%<register%> storage class specifier used");
8775 : : }
8776 : :
8777 : : /* If a name was specified, get the string. */
8778 : 259572379 : if (at_namespace_scope_p ())
8779 : 53369700 : asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
8780 : 259572379 : if (asmspec_tree && asmspec_tree != error_mark_node)
8781 : 938850 : asmspec = TREE_STRING_POINTER (asmspec_tree);
8782 : :
8783 : 259572379 : bool in_class_decl
8784 : 259572379 : = (current_class_type
8785 : 160482501 : && CP_DECL_CONTEXT (decl) == current_class_type
8786 : 108262988 : && TYPE_BEING_DEFINED (current_class_type)
8787 : 366387025 : && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type));
8788 : :
8789 : 103763724 : if (in_class_decl
8790 : 103763724 : && (DECL_INITIAL (decl) || init))
8791 : 74302339 : DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
8792 : :
8793 : 259572379 : if (VAR_P (decl)
8794 : 259572379 : && (auto_node = type_uses_auto (type)))
8795 : : {
8796 : 7694665 : tree d_init;
8797 : 7694665 : if (init == NULL_TREE)
8798 : : {
8799 : 183 : if (DECL_LANG_SPECIFIC (decl)
8800 : 107 : && DECL_TEMPLATE_INSTANTIATION (decl)
8801 : 287 : && !DECL_TEMPLATE_INSTANTIATED (decl))
8802 : : {
8803 : : /* init is null because we're deferring instantiating the
8804 : : initializer until we need it. Well, we need it now. */
8805 : 98 : instantiate_decl (decl, /*defer_ok*/true, /*expl*/false);
8806 : 98 : return;
8807 : : }
8808 : :
8809 : 85 : if (CLASS_PLACEHOLDER_TEMPLATE (auto_node))
8810 : : /* Class deduction with no initializer is OK. */;
8811 : : else
8812 : : {
8813 : : /* Ordinary auto deduction without an initializer, a situation
8814 : : which grokdeclarator already detects and rejects for the most
8815 : : part. But we can still get here if we're instantiating a
8816 : : variable template before we've fully parsed (and attached) its
8817 : : initializer, e.g. template<class> auto x = x<int>; */
8818 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
8819 : : "declaration of %q#D has no initializer", decl);
8820 : 3 : TREE_TYPE (decl) = error_mark_node;
8821 : 3 : return;
8822 : : }
8823 : : }
8824 : 7694564 : d_init = init;
8825 : 7694564 : if (d_init)
8826 : : {
8827 : 7694482 : if (TREE_CODE (d_init) == TREE_LIST
8828 : 7714490 : && !CLASS_PLACEHOLDER_TEMPLATE (auto_node))
8829 : 11833 : d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
8830 : : tf_warning_or_error);
8831 : 7694482 : d_init = resolve_nondeduced_context (d_init, tf_warning_or_error);
8832 : : /* Force auto deduction now. Use tf_none to avoid redundant warnings
8833 : : on deprecated-14.C. */
8834 : 7694482 : mark_single_function (d_init, tf_none);
8835 : : }
8836 : 7694564 : enum auto_deduction_context adc = adc_variable_type;
8837 : 7694564 : if (DECL_DECOMPOSITION_P (decl))
8838 : : adc = adc_decomp_type;
8839 : 7694564 : tree outer_targs = NULL_TREE;
8840 : 7694564 : if (PLACEHOLDER_TYPE_CONSTRAINTS_INFO (auto_node)
8841 : 321 : && DECL_LANG_SPECIFIC (decl)
8842 : 126 : && DECL_TEMPLATE_INFO (decl)
8843 : 7694621 : && !DECL_FUNCTION_SCOPE_P (decl))
8844 : : /* The outer template arguments might be needed for satisfaction.
8845 : : (For function scope variables, do_auto_deduction will obtain the
8846 : : outer template arguments from current_function_decl.) */
8847 : 57 : outer_targs = DECL_TI_ARGS (decl);
8848 : 7694564 : type = TREE_TYPE (decl) = do_auto_deduction (type, d_init, auto_node,
8849 : : tf_warning_or_error, adc,
8850 : : outer_targs, flags);
8851 : 7694564 : if (type == error_mark_node)
8852 : : return;
8853 : 7693732 : if (TREE_CODE (type) == FUNCTION_TYPE)
8854 : : {
8855 : 3 : error ("initializer for %<decltype(auto) %D%> has function type; "
8856 : : "did you forget the %<()%>?", decl);
8857 : 3 : TREE_TYPE (decl) = error_mark_node;
8858 : 3 : return;
8859 : : }
8860 : : /* As in start_decl_1, complete so TREE_READONLY is set properly. */
8861 : 7693729 : if (!processing_template_decl
8862 : 1624263 : && !type_uses_auto (type)
8863 : 9317985 : && !COMPLETE_TYPE_P (complete_type (type)))
8864 : : {
8865 : 15 : auto_diagnostic_group d;
8866 : 15 : error_at (location_of (decl),
8867 : : "deduced type %qT for %qD is incomplete", type, decl);
8868 : 15 : cxx_incomplete_type_inform (type);
8869 : 15 : TREE_TYPE (decl) = error_mark_node;
8870 : 15 : return;
8871 : 15 : }
8872 : 7693714 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
8873 : :
8874 : : /* Update the type of the corresponding TEMPLATE_DECL to match. */
8875 : 7693714 : if (DECL_LANG_SPECIFIC (decl)
8876 : 126385 : && DECL_TEMPLATE_INFO (decl)
8877 : 7696399 : && DECL_TEMPLATE_RESULT (DECL_TI_TEMPLATE (decl)) == decl)
8878 : 2470 : TREE_TYPE (DECL_TI_TEMPLATE (decl)) = type;
8879 : : }
8880 : :
8881 : 259571428 : if (ensure_literal_type_for_constexpr_object (decl) == error_mark_node)
8882 : : {
8883 : 54 : DECL_DECLARED_CONSTEXPR_P (decl) = 0;
8884 : 54 : if (VAR_P (decl) && DECL_CLASS_SCOPE_P (decl))
8885 : : {
8886 : 6 : init = NULL_TREE;
8887 : 6 : DECL_EXTERNAL (decl) = 1;
8888 : : }
8889 : : }
8890 : :
8891 : 259571428 : if (VAR_P (decl)
8892 : 90839946 : && DECL_CLASS_SCOPE_P (decl)
8893 : 13795651 : && verify_type_context (DECL_SOURCE_LOCATION (decl),
8894 : : TCTX_STATIC_STORAGE, type)
8895 : 273367079 : && DECL_INITIALIZED_IN_CLASS_P (decl))
8896 : 12713699 : check_static_variable_definition (decl, type);
8897 : :
8898 : 259571428 : if (!processing_template_decl && VAR_P (decl) && is_global_var (decl))
8899 : : {
8900 : 19557083 : type_context_kind context = (DECL_THREAD_LOCAL_P (decl)
8901 : 19557083 : ? TCTX_THREAD_STORAGE
8902 : 19557083 : : TCTX_STATIC_STORAGE);
8903 : 19557083 : verify_type_context (input_location, context, TREE_TYPE (decl));
8904 : : }
8905 : :
8906 : 259571428 : if (init && TREE_CODE (decl) == FUNCTION_DECL)
8907 : : {
8908 : 327361 : tree clone;
8909 : 327361 : if (init == ridpointers[(int)RID_DELETE]
8910 : 327361 : || (TREE_CODE (init) == STRING_CST
8911 : 24 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
8912 : : {
8913 : : /* FIXME check this is 1st decl. */
8914 : 305361 : if (UNLIKELY (DECL_MAIN_P (decl)))
8915 : : {
8916 : : /* [basic.start.main]/3: A program that defines main as deleted
8917 : : is ill-formed. */
8918 : 3 : error ("%<::main%> cannot be deleted");
8919 : 3 : DECL_INITIAL (decl) = NULL_TREE;
8920 : : }
8921 : : else
8922 : : {
8923 : 305358 : DECL_DELETED_FN (decl) = 1;
8924 : 305358 : DECL_DECLARED_INLINE_P (decl) = 1;
8925 : 305358 : DECL_INITIAL (decl)
8926 : 305358 : = TREE_CODE (init) == STRING_CST ? init : error_mark_node;
8927 : 305376 : FOR_EACH_CLONE (clone, decl)
8928 : : {
8929 : 18 : DECL_DELETED_FN (clone) = 1;
8930 : 18 : DECL_DECLARED_INLINE_P (clone) = 1;
8931 : 18 : DECL_INITIAL (clone) = DECL_INITIAL (decl);
8932 : : }
8933 : : }
8934 : 305361 : init = NULL_TREE;
8935 : : }
8936 : 22000 : else if (init == ridpointers[(int)RID_DEFAULT])
8937 : : {
8938 : 21988 : if (defaultable_fn_check (decl))
8939 : 21964 : DECL_DEFAULTED_FN (decl) = 1;
8940 : : else
8941 : 24 : DECL_INITIAL (decl) = NULL_TREE;
8942 : : }
8943 : : }
8944 : :
8945 : 259571428 : if (init && VAR_P (decl))
8946 : : {
8947 : 77104632 : DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
8948 : : /* If DECL is a reference, then we want to know whether init is a
8949 : : reference constant; init_const_expr_p as passed tells us whether
8950 : : it's an rvalue constant. */
8951 : 77104632 : if (TYPE_REF_P (type))
8952 : 2118002 : init_const_expr_p = potential_constant_expression (init);
8953 : 77104632 : if (init_const_expr_p)
8954 : : {
8955 : : /* Set these flags now for templates. We'll update the flags in
8956 : : store_init_value for instantiations. */
8957 : 63618725 : DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
8958 : 63618725 : if (decl_maybe_constant_var_p (decl)
8959 : : /* FIXME setting TREE_CONSTANT on refs breaks the back end. */
8960 : 63618725 : && !TYPE_REF_P (type))
8961 : 22530446 : TREE_CONSTANT (decl) = true;
8962 : : }
8963 : : /* This is handled mostly by gimplify.cc, but we have to deal with
8964 : : not warning about int x = x; as it is a GCC extension to turn off
8965 : : this warning but only if warn_init_self is zero. */
8966 : 77104632 : if (!DECL_EXTERNAL (decl)
8967 : 75676924 : && !TREE_STATIC (decl)
8968 : 58605076 : && decl == tree_strip_any_location_wrapper (init)
8969 : 77107855 : && !warning_enabled_at (DECL_SOURCE_LOCATION (decl), OPT_Winit_self))
8970 : 3199 : suppress_warning (decl, OPT_Winit_self);
8971 : : }
8972 : 182466796 : else if (VAR_P (decl)
8973 : 13735314 : && COMPLETE_TYPE_P (type)
8974 : 10808900 : && !TYPE_REF_P (type)
8975 : 10808541 : && !dependent_type_p (type)
8976 : 192998215 : && is_really_empty_class (type, /*ignore_vptr*/false))
8977 : : /* We have no initializer but there's nothing to initialize anyway.
8978 : : Treat DECL as constant due to c++/109876. */
8979 : 458892 : TREE_CONSTANT (decl) = true;
8980 : :
8981 : 259571428 : if (flag_openmp
8982 : 352612 : && TREE_CODE (decl) == FUNCTION_DECL
8983 : : /* #pragma omp declare variant on methods handled in finish_struct
8984 : : instead. */
8985 : 259723645 : && (!DECL_OBJECT_MEMBER_FUNCTION_P (decl)
8986 : 40978 : || COMPLETE_TYPE_P (DECL_CONTEXT (decl))))
8987 : 111462 : if (tree attr = lookup_attribute ("omp declare variant base",
8988 : 111462 : DECL_ATTRIBUTES (decl)))
8989 : 813 : omp_declare_variant_finalize (decl, attr);
8990 : :
8991 : 259571428 : if (processing_template_decl)
8992 : : {
8993 : 151500156 : bool type_dependent_p;
8994 : :
8995 : : /* Add this declaration to the statement-tree. */
8996 : 151500156 : if (at_function_scope_p ())
8997 : 55634862 : add_decl_expr (decl);
8998 : :
8999 : 151500156 : type_dependent_p = dependent_type_p (type);
9000 : :
9001 : 151500156 : if (check_for_bare_parameter_packs (init))
9002 : : {
9003 : 3 : init = NULL_TREE;
9004 : 3 : DECL_INITIAL (decl) = NULL_TREE;
9005 : : }
9006 : :
9007 : : /* Generally, initializers in templates are expanded when the
9008 : : template is instantiated. But, if DECL is a variable constant
9009 : : then it can be used in future constant expressions, so its value
9010 : : must be available. */
9011 : :
9012 : 151500156 : bool dep_init = false;
9013 : :
9014 : 151500156 : if (!VAR_P (decl) || type_dependent_p)
9015 : : /* We can't do anything if the decl has dependent type. */;
9016 : 18771274 : else if (init
9017 : 17252283 : && (init_const_expr_p || DECL_DECLARED_CONSTEXPR_P (decl))
9018 : 13168583 : && !TYPE_REF_P (type)
9019 : 13145313 : && decl_maybe_constant_var_p (decl)
9020 : 25728613 : && !(dep_init = value_dependent_init_p (init)))
9021 : : {
9022 : : /* This variable seems to be a non-dependent constant, so process
9023 : : its initializer. If check_initializer returns non-null the
9024 : : initialization wasn't constant after all. */
9025 : 1744948 : tree init_code;
9026 : 1744948 : cleanups = make_tree_vector ();
9027 : 1744948 : init_code = check_initializer (decl, init, flags, &cleanups);
9028 : 1744948 : if (init_code == NULL_TREE)
9029 : 1744948 : init = NULL_TREE;
9030 : 1744948 : release_tree_vector (cleanups);
9031 : : }
9032 : : else
9033 : : {
9034 : 17026326 : gcc_assert (!DECL_PRETTY_FUNCTION_P (decl));
9035 : : /* Try to deduce array size. */
9036 : 17026326 : maybe_deduce_size_from_array_init (decl, init);
9037 : : /* And complain about multiple initializers. */
9038 : 15507335 : if (init && TREE_CODE (init) == TREE_LIST && TREE_CHAIN (init)
9039 : 17079429 : && !MAYBE_CLASS_TYPE_P (type))
9040 : 7 : init = build_x_compound_expr_from_list (init, ELK_INIT,
9041 : : tf_warning_or_error);
9042 : : }
9043 : :
9044 : 151500156 : if (init)
9045 : 44024268 : DECL_INITIAL (decl) = init;
9046 : :
9047 : 151500156 : if (dep_init)
9048 : : {
9049 : 5212391 : retrofit_lang_decl (decl);
9050 : 5212391 : SET_DECL_DEPENDENT_INIT_P (decl, true);
9051 : : }
9052 : :
9053 : 151500156 : if (VAR_P (decl) && DECL_REGISTER (decl) && asmspec)
9054 : : {
9055 : 3 : set_user_assembler_name (decl, asmspec);
9056 : 3 : DECL_HARD_REGISTER (decl) = 1;
9057 : : }
9058 : 151500156 : return;
9059 : : }
9060 : :
9061 : : /* Just store non-static data member initializers for later. */
9062 : 108071272 : if (init && TREE_CODE (decl) == FIELD_DECL)
9063 : 354602 : DECL_INITIAL (decl) = init;
9064 : :
9065 : : /* Take care of TYPE_DECLs up front. */
9066 : 108071272 : if (TREE_CODE (decl) == TYPE_DECL)
9067 : : {
9068 : 8716509 : if (type != error_mark_node
9069 : 8716509 : && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
9070 : : {
9071 : 4116915 : if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
9072 : 0 : warning (0, "shadowing previous type declaration of %q#D", decl);
9073 : 4116915 : set_identifier_type_value (DECL_NAME (decl), decl);
9074 : : }
9075 : :
9076 : : /* If we have installed this as the canonical typedef for this
9077 : : type, and that type has not been defined yet, delay emitting
9078 : : the debug information for it, as we will emit it later. */
9079 : 8716509 : if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
9080 : 8716509 : && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
9081 : 528837 : TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
9082 : :
9083 : 8716509 : rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
9084 : : at_eof);
9085 : 8716509 : return;
9086 : : }
9087 : :
9088 : : /* A reference will be modified here, as it is initialized. */
9089 : 99354763 : if (! DECL_EXTERNAL (decl)
9090 : 43153931 : && TREE_READONLY (decl)
9091 : 120419783 : && TYPE_REF_P (type))
9092 : : {
9093 : 216201 : was_readonly = 1;
9094 : 216201 : TREE_READONLY (decl) = 0;
9095 : : }
9096 : :
9097 : : /* This needs to happen before extend_ref_init_temps. */
9098 : 99354763 : if (VAR_OR_FUNCTION_DECL_P (decl))
9099 : : {
9100 : 91353670 : if (VAR_P (decl))
9101 : 41228294 : maybe_commonize_var (decl);
9102 : 91353670 : determine_visibility (decl);
9103 : : }
9104 : :
9105 : 99354763 : if (VAR_P (decl))
9106 : : {
9107 : 41228294 : duration_kind dk = decl_storage_duration (decl);
9108 : : /* [dcl.constinit]/1 "The constinit specifier shall be applied
9109 : : only to a declaration of a variable with static or thread storage
9110 : : duration." */
9111 : 41228294 : if (DECL_DECLARED_CONSTINIT_P (decl)
9112 : 41228294 : && !(dk == dk_thread || dk == dk_static))
9113 : : {
9114 : 12 : error_at (DECL_SOURCE_LOCATION (decl),
9115 : : "%<constinit%> can only be applied to a variable with "
9116 : : "static or thread storage duration");
9117 : 12 : return;
9118 : : }
9119 : :
9120 : 41228282 : if (decomp)
9121 : 30465 : cp_maybe_mangle_decomp (decl, decomp);
9122 : :
9123 : : /* If this is a local variable that will need a mangled name,
9124 : : register it now. We must do this before processing the
9125 : : initializer for the variable, since the initialization might
9126 : : require a guard variable, and since the mangled name of the
9127 : : guard variable will depend on the mangled name of this
9128 : : variable. */
9129 : 82456564 : if (DECL_FUNCTION_SCOPE_P (decl)
9130 : 21799394 : && TREE_STATIC (decl)
9131 : 41356477 : && !DECL_ARTIFICIAL (decl))
9132 : : {
9133 : : /* The variable holding an anonymous union will have had its
9134 : : discriminator set in finish_anon_union, after which it's
9135 : : NAME will have been cleared. */
9136 : 127961 : if (DECL_NAME (decl))
9137 : 127918 : determine_local_discriminator (decl);
9138 : : /* Normally has_forced_label_in_static is set during GIMPLE
9139 : : lowering, but [cd]tors are never actually compiled directly.
9140 : : We need to set this early so we can deal with the label
9141 : : address extension. */
9142 : 127961 : if ((DECL_CONSTRUCTOR_P (current_function_decl)
9143 : 127932 : || DECL_DESTRUCTOR_P (current_function_decl))
9144 : 127971 : && init)
9145 : : {
9146 : 29 : walk_tree (&init, notice_forced_label_r, NULL, NULL);
9147 : 29 : add_local_decl (cfun, decl);
9148 : : }
9149 : : /* And make sure it's in the symbol table for
9150 : : c_parse_final_cleanups to find. */
9151 : 127961 : varpool_node::get_create (decl);
9152 : : }
9153 : :
9154 : : /* Convert the initializer to the type of DECL, if we have not
9155 : : already initialized DECL. */
9156 : 41228282 : if (!DECL_INITIALIZED_P (decl)
9157 : : /* If !DECL_EXTERNAL then DECL is being defined. In the
9158 : : case of a static data member initialized inside the
9159 : : class-specifier, there can be an initializer even if DECL
9160 : : is *not* defined. */
9161 : 41228282 : && (!DECL_EXTERNAL (decl) || init))
9162 : : {
9163 : 36101541 : cleanups = make_tree_vector ();
9164 : 36101541 : init = check_initializer (decl, init, flags, &cleanups);
9165 : :
9166 : : /* Handle:
9167 : :
9168 : : [dcl.init]
9169 : :
9170 : : The memory occupied by any object of static storage
9171 : : duration is zero-initialized at program startup before
9172 : : any other initialization takes place.
9173 : :
9174 : : We cannot create an appropriate initializer until after
9175 : : the type of DECL is finalized. If DECL_INITIAL is set,
9176 : : then the DECL is statically initialized, and any
9177 : : necessary zero-initialization has already been performed. */
9178 : 36098844 : if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
9179 : 390904 : DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
9180 : : /*nelts=*/NULL_TREE,
9181 : : /*static_storage_p=*/true);
9182 : : /* Remember that the initialization for this variable has
9183 : : taken place. */
9184 : 36098844 : DECL_INITIALIZED_P (decl) = 1;
9185 : : /* This declaration is the definition of this variable,
9186 : : unless we are initializing a static data member within
9187 : : the class specifier. */
9188 : 36098844 : if (!DECL_EXTERNAL (decl))
9189 : 41225585 : var_definition_p = true;
9190 : : }
9191 : : /* If the variable has an array type, lay out the type, even if
9192 : : there is no initializer. It is valid to index through the
9193 : : array, and we must get TYPE_ALIGN set correctly on the array
9194 : : type. */
9195 : 5126741 : else if (TREE_CODE (type) == ARRAY_TYPE)
9196 : 210597 : layout_type (type);
9197 : :
9198 : 41225585 : if (TREE_STATIC (decl)
9199 : 19005067 : && !at_function_scope_p ()
9200 : 60102457 : && current_function_decl == NULL)
9201 : : /* So decl is a global variable or a static member of a
9202 : : non local class. Record the types it uses
9203 : : so that we can decide later to emit debug info for them. */
9204 : 18876860 : record_types_used_by_current_var_decl (decl);
9205 : : }
9206 : :
9207 : : /* Add this declaration to the statement-tree. This needs to happen
9208 : : after the call to check_initializer so that the DECL_EXPR for a
9209 : : reference temp is added before the DECL_EXPR for the reference itself. */
9210 : 99352054 : if (DECL_FUNCTION_SCOPE_P (decl))
9211 : : {
9212 : : /* If we're building a variable sized type, and we might be
9213 : : reachable other than via the top of the current binding
9214 : : level, then create a new BIND_EXPR so that we deallocate
9215 : : the object at the right time. */
9216 : 21799394 : if (VAR_P (decl)
9217 : 21799394 : && DECL_SIZE (decl)
9218 : 20257084 : && !TREE_CONSTANT (DECL_SIZE (decl))
9219 : 21800358 : && STATEMENT_LIST_HAS_LABEL (cur_stmt_list))
9220 : : {
9221 : 3 : tree bind;
9222 : 3 : bind = build3 (BIND_EXPR, void_type_node, NULL, NULL, NULL);
9223 : 3 : TREE_SIDE_EFFECTS (bind) = 1;
9224 : 3 : add_stmt (bind);
9225 : 3 : BIND_EXPR_BODY (bind) = push_stmt_list ();
9226 : : }
9227 : 21799394 : add_decl_expr (decl);
9228 : : }
9229 : :
9230 : 99352054 : tree decomp_init = NULL_TREE;
9231 : : /* Let the middle end know about variables and functions -- but not
9232 : : static data members in uninstantiated class templates. */
9233 : 99352054 : if (VAR_OR_FUNCTION_DECL_P (decl))
9234 : : {
9235 : 91350961 : if (VAR_P (decl))
9236 : : {
9237 : 41225585 : layout_var_decl (decl);
9238 : 41225585 : if (!flag_weak)
9239 : : /* Check again now that we have an initializer. */
9240 : 57 : maybe_commonize_var (decl);
9241 : : /* A class-scope constexpr variable with an out-of-class declaration.
9242 : : C++17 makes them implicitly inline, but still force it out. */
9243 : 56097187 : if (DECL_INLINE_VAR_P (decl)
9244 : 12956622 : && !DECL_VAR_DECLARED_INLINE_P (decl)
9245 : 8111521 : && !DECL_TEMPLATE_INSTANTIATION (decl)
9246 : 25987706 : && !in_class_decl)
9247 : 100 : mark_needed (decl);
9248 : : }
9249 : :
9250 : 91350961 : if (var_definition_p
9251 : : /* With -fmerge-all-constants, gimplify_init_constructor
9252 : : might add TREE_STATIC to aggregate variables. */
9253 : 35092204 : && (TREE_STATIC (decl)
9254 : 21671199 : || (flag_merge_constants >= 2
9255 : 38 : && AGGREGATE_TYPE_P (type))))
9256 : : {
9257 : : /* If a TREE_READONLY variable needs initialization
9258 : : at runtime, it is no longer readonly and we need to
9259 : : avoid MEM_READONLY_P being set on RTL created for it. */
9260 : 13421008 : if (init)
9261 : : {
9262 : 12634 : if (TREE_READONLY (decl))
9263 : 485 : TREE_READONLY (decl) = 0;
9264 : : was_readonly = 0;
9265 : : }
9266 : 13408374 : else if (was_readonly)
9267 : 1536 : TREE_READONLY (decl) = 1;
9268 : :
9269 : : /* Likewise if it needs destruction. */
9270 : 13421008 : if (!decl_maybe_constant_destruction (decl, type))
9271 : 2901 : TREE_READONLY (decl) = 0;
9272 : : }
9273 : 77929953 : else if (VAR_P (decl)
9274 : 27804577 : && CP_DECL_THREAD_LOCAL_P (decl)
9275 : 19239 : && (!DECL_EXTERNAL (decl) || flag_extern_tls_init)
9276 : 19239 : && (was_readonly || TREE_READONLY (decl))
9277 : 77929968 : && var_needs_tls_wrapper (decl))
9278 : : {
9279 : : /* TLS variables need dynamic initialization by the TLS wrapper
9280 : : function, we don't want to hoist accesses to it before the
9281 : : wrapper. */
9282 : 6 : was_readonly = 0;
9283 : 6 : TREE_READONLY (decl) = 0;
9284 : : }
9285 : :
9286 : 91350961 : make_rtl_for_nonlocal_decl (decl, init, asmspec);
9287 : :
9288 : : /* Check for abstractness of the type. */
9289 : 91350961 : if (var_definition_p)
9290 : 35092204 : abstract_virtuals_error (decl, type);
9291 : :
9292 : 91350961 : if (decomp && !cp_finish_decomp (decl, decomp, true))
9293 : 14307 : decomp = NULL;
9294 : :
9295 : 91350961 : if (TREE_TYPE (decl) == error_mark_node)
9296 : : /* No initialization required. */
9297 : : ;
9298 : 91350890 : else if (TREE_CODE (decl) == FUNCTION_DECL)
9299 : : {
9300 : 50125376 : if (init)
9301 : : {
9302 : 572 : if (init == ridpointers[(int)RID_DEFAULT])
9303 : : {
9304 : : /* An out-of-class default definition is defined at
9305 : : the point where it is explicitly defaulted. */
9306 : 560 : if (DECL_DELETED_FN (decl))
9307 : 6 : maybe_explain_implicit_delete (decl);
9308 : 554 : else if (DECL_INITIAL (decl) == error_mark_node)
9309 : 530 : synthesize_method (decl);
9310 : : }
9311 : : else
9312 : 24 : error_at (cp_expr_loc_or_loc (init,
9313 : 12 : DECL_SOURCE_LOCATION (decl)),
9314 : : "function %q#D is initialized like a variable",
9315 : : decl);
9316 : : }
9317 : : /* else no initialization required. */
9318 : : }
9319 : 41225514 : else if (DECL_EXTERNAL (decl)
9320 : 41225514 : && ! (DECL_LANG_SPECIFIC (decl)
9321 : 5830126 : && DECL_NOT_REALLY_EXTERN (decl)))
9322 : : {
9323 : : /* check_initializer will have done any constant initialization. */
9324 : : }
9325 : : /* A variable definition. */
9326 : 36840308 : else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
9327 : : {
9328 : : /* Initialize the local variable. */
9329 : 21671181 : if (!decomp)
9330 : 21655074 : initialize_local_var (decl, init, false);
9331 : : else
9332 : : {
9333 : 16107 : tree cleanup = NULL_TREE;
9334 : 16107 : if (DECL_SIZE (decl))
9335 : 16107 : cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
9336 : : /* If cp_finish_decomp needs to emit any code, we need to emit that
9337 : : code after code emitted by initialize_local_var in a single
9338 : : CLEANUP_POINT_EXPR, so that temporaries are destructed only
9339 : : after the cp_finish_decomp emitted code.
9340 : : If there are any cleanups, either extend_ref_init_temps
9341 : : created ones or e.g. array destruction, push those first
9342 : : with the cleanups guarded on a bool temporary, initially
9343 : : set to false and set to true after initialize_local_var
9344 : : emitted code. */
9345 : 16107 : tree guard = NULL_TREE;
9346 : 16107 : if (cleanups || cleanup)
9347 : : {
9348 : 16107 : guard = force_target_expr (boolean_type_node,
9349 : : boolean_false_node, tf_none);
9350 : 16107 : add_stmt (guard);
9351 : 16107 : guard = TARGET_EXPR_SLOT (guard);
9352 : : }
9353 : 16107 : tree sl = push_stmt_list ();
9354 : 16107 : initialize_local_var (decl, init, true);
9355 : 16107 : if (guard)
9356 : : {
9357 : 16107 : add_stmt (build2 (MODIFY_EXPR, boolean_type_node,
9358 : : guard, boolean_true_node));
9359 : 16125 : for (tree &t : *cleanups)
9360 : 18 : t = build3 (COND_EXPR, void_type_node,
9361 : : guard, t, void_node);
9362 : 16107 : if (cleanup)
9363 : 19 : cleanup = build3 (COND_EXPR, void_type_node,
9364 : : guard, cleanup, void_node);
9365 : : }
9366 : 16107 : unsigned before = stmt_list_stack->length ();
9367 : 16107 : cp_finish_decomp (decl, decomp);
9368 : 16107 : decomp = NULL;
9369 : 16107 : unsigned n_extra_cleanups = stmt_list_stack->length () - before;
9370 : 16107 : sl = pop_stmt_list (sl);
9371 : 16107 : if (n_extra_cleanups)
9372 : : {
9373 : : /* If cp_finish_decomp needs any cleanups, such as for
9374 : : extend_ref_init_temps created vars, pop_stmt_list
9375 : : popped that all, so push those extra cleanups around
9376 : : the whole sequence with a guard variable. */
9377 : 9 : gcc_assert (TREE_CODE (sl) == STATEMENT_LIST);
9378 : 9 : guard = force_target_expr (integer_type_node,
9379 : : integer_zero_node, tf_none);
9380 : 9 : add_stmt (guard);
9381 : 9 : guard = TARGET_EXPR_SLOT (guard);
9382 : 45 : for (unsigned i = 0; i < n_extra_cleanups; ++i)
9383 : : {
9384 : 36 : tree_stmt_iterator tsi = tsi_last (sl);
9385 : 36 : gcc_assert (!tsi_end_p (tsi));
9386 : 36 : tree last = tsi_stmt (tsi);
9387 : 36 : gcc_assert (TREE_CODE (last) == CLEANUP_STMT
9388 : : && !CLEANUP_EH_ONLY (last));
9389 : 36 : tree cst = build_int_cst (integer_type_node, i + 1);
9390 : 72 : tree cl = build3 (COND_EXPR, void_type_node,
9391 : : build2 (GE_EXPR, boolean_type_node,
9392 : : guard, cst),
9393 : 36 : CLEANUP_EXPR (last), void_node);
9394 : 36 : extra_cleanups.safe_push (cl);
9395 : 36 : tsi_link_before (&tsi, build2 (MODIFY_EXPR,
9396 : : integer_type_node,
9397 : : guard, cst),
9398 : : TSI_SAME_STMT);
9399 : 36 : tree sl2 = CLEANUP_BODY (last);
9400 : 36 : gcc_assert (TREE_CODE (sl2) == STATEMENT_LIST);
9401 : 36 : tsi_link_before (&tsi, sl2, TSI_SAME_STMT);
9402 : 36 : tsi_delink (&tsi);
9403 : : }
9404 : : }
9405 : 16107 : decomp_init = maybe_cleanup_point_expr_void (sl);
9406 : 16107 : if (cleanup)
9407 : 19 : finish_decl_cleanup (decl, cleanup);
9408 : : }
9409 : : }
9410 : :
9411 : : /* If a variable is defined, and then a subsequent
9412 : : definition with external linkage is encountered, we will
9413 : : get here twice for the same variable. We want to avoid
9414 : : calling expand_static_init more than once. For variables
9415 : : that are not static data members, we can call
9416 : : expand_static_init only when we actually process the
9417 : : initializer. It is not legal to redeclare a static data
9418 : : member, so this issue does not arise in that case. */
9419 : 15169127 : else if (var_definition_p && TREE_STATIC (decl))
9420 : 13420962 : expand_static_init (decl, init);
9421 : : }
9422 : :
9423 : : /* If a CLEANUP_STMT was created to destroy a temporary bound to a
9424 : : reference, insert it in the statement-tree now. */
9425 : 99352054 : if (cleanups)
9426 : : {
9427 : 36103938 : for (tree t : *cleanups)
9428 : : {
9429 : 5094 : push_cleanup (NULL_TREE, t, false);
9430 : : /* As in initialize_local_var. */
9431 : 5094 : wrap_temporary_cleanups (init, t);
9432 : : }
9433 : 36098844 : release_tree_vector (cleanups);
9434 : : }
9435 : :
9436 : 99352108 : for (tree t : &extra_cleanups)
9437 : 36 : push_cleanup (NULL_TREE, t, false);
9438 : :
9439 : 99352054 : if (decomp_init)
9440 : 16107 : add_stmt (decomp_init);
9441 : :
9442 : 99352054 : if (was_readonly)
9443 : 215786 : TREE_READONLY (decl) = 1;
9444 : :
9445 : 99352054 : if (flag_openmp
9446 : 207886 : && VAR_P (decl)
9447 : 99430712 : && lookup_attribute ("omp declare target implicit",
9448 : 78658 : DECL_ATTRIBUTES (decl)))
9449 : : {
9450 : 50 : DECL_ATTRIBUTES (decl)
9451 : 50 : = remove_attribute ("omp declare target implicit",
9452 : 50 : DECL_ATTRIBUTES (decl));
9453 : 50 : complete_type (TREE_TYPE (decl));
9454 : 50 : if (!omp_mappable_type (TREE_TYPE (decl)))
9455 : : {
9456 : 30 : auto_diagnostic_group d;
9457 : 30 : error ("%q+D in declare target directive does not have mappable"
9458 : : " type", decl);
9459 : 30 : if (TREE_TYPE (decl) != error_mark_node
9460 : 30 : && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
9461 : 30 : cxx_incomplete_type_inform (TREE_TYPE (decl));
9462 : 30 : }
9463 : 20 : else if (!lookup_attribute ("omp declare target",
9464 : 20 : DECL_ATTRIBUTES (decl))
9465 : 40 : && !lookup_attribute ("omp declare target link",
9466 : 20 : DECL_ATTRIBUTES (decl)))
9467 : : {
9468 : 20 : DECL_ATTRIBUTES (decl)
9469 : 20 : = tree_cons (get_identifier ("omp declare target"),
9470 : 20 : NULL_TREE, DECL_ATTRIBUTES (decl));
9471 : 20 : symtab_node *node = symtab_node::get (decl);
9472 : 20 : if (node != NULL)
9473 : : {
9474 : 17 : node->offloadable = 1;
9475 : 17 : if (ENABLE_OFFLOADING)
9476 : : {
9477 : : g->have_offload = true;
9478 : : if (is_a <varpool_node *> (node))
9479 : : vec_safe_push (offload_vars, decl);
9480 : : }
9481 : : }
9482 : : }
9483 : : }
9484 : :
9485 : : /* This is the last point we can lower alignment so give the target the
9486 : : chance to do so. */
9487 : 99352054 : if (VAR_P (decl)
9488 : 41225585 : && !is_global_var (decl)
9489 : 121023253 : && !DECL_HARD_REGISTER (decl))
9490 : 21671152 : targetm.lower_local_decl_alignment (decl);
9491 : :
9492 : 99352054 : invoke_plugin_callbacks (PLUGIN_FINISH_DECL, decl);
9493 : 259570193 : }
9494 : :
9495 : : /* For class TYPE return itself or some its bases that contain
9496 : : any direct non-static data members. Return error_mark_node if an
9497 : : error has been diagnosed. */
9498 : :
9499 : : static tree
9500 : 18396 : find_decomp_class_base (location_t loc, tree type, tree ret)
9501 : : {
9502 : 36792 : if (LAMBDA_TYPE_P (type))
9503 : : {
9504 : 9 : auto_diagnostic_group d;
9505 : 9 : error_at (loc, "cannot decompose lambda closure type %qT", type);
9506 : 9 : inform (location_of (type), "lambda declared here");
9507 : 9 : return error_mark_node;
9508 : 9 : }
9509 : :
9510 : 18387 : bool member_seen = false;
9511 : 248151 : for (tree field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
9512 : 422547 : if (TREE_CODE (field) != FIELD_DECL
9513 : 37129 : || DECL_ARTIFICIAL (field)
9514 : 266832 : || DECL_UNNAMED_BIT_FIELD (field))
9515 : 192762 : continue;
9516 : 37023 : else if (ret)
9517 : : return type;
9518 : 37006 : else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
9519 : : {
9520 : 2 : auto_diagnostic_group d;
9521 : 2 : if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
9522 : 1 : error_at (loc, "cannot decompose class type %qT because it has an "
9523 : : "anonymous struct member", type);
9524 : : else
9525 : 1 : error_at (loc, "cannot decompose class type %qT because it has an "
9526 : : "anonymous union member", type);
9527 : 2 : inform (DECL_SOURCE_LOCATION (field), "declared here");
9528 : 2 : return error_mark_node;
9529 : 2 : }
9530 : 37004 : else if (!accessible_p (type, field, true))
9531 : : {
9532 : 2 : auto_diagnostic_group d;
9533 : 2 : error_at (loc, "cannot decompose inaccessible member %qD of %qT",
9534 : : field, type);
9535 : 2 : inform (DECL_SOURCE_LOCATION (field),
9536 : 2 : TREE_PRIVATE (field)
9537 : : ? G_("declared private here")
9538 : : : G_("declared protected here"));
9539 : 2 : return error_mark_node;
9540 : 2 : }
9541 : : else
9542 : : member_seen = true;
9543 : :
9544 : 18366 : tree base_binfo, binfo;
9545 : 18366 : tree orig_ret = ret;
9546 : 18366 : int i;
9547 : 18366 : if (member_seen)
9548 : 18317 : ret = type;
9549 : 18421 : for (binfo = TYPE_BINFO (type), i = 0;
9550 : 18421 : BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9551 : : {
9552 : 66 : auto_diagnostic_group d;
9553 : 66 : tree t = find_decomp_class_base (loc, TREE_TYPE (base_binfo), ret);
9554 : 66 : if (t == error_mark_node)
9555 : : {
9556 : 3 : inform (location_of (type), "in base class of %qT", type);
9557 : 3 : return error_mark_node;
9558 : : }
9559 : 63 : if (t != NULL_TREE && t != ret)
9560 : : {
9561 : 36 : if (ret == type)
9562 : : {
9563 : 4 : error_at (loc, "cannot decompose class type %qT: both it and "
9564 : : "its base class %qT have non-static data members",
9565 : : type, t);
9566 : 4 : return error_mark_node;
9567 : : }
9568 : 32 : else if (orig_ret != NULL_TREE)
9569 : : return t;
9570 : 32 : else if (ret != NULL_TREE)
9571 : : {
9572 : 4 : error_at (loc, "cannot decompose class type %qT: its base "
9573 : : "classes %qT and %qT have non-static data "
9574 : : "members", type, ret, t);
9575 : 4 : return error_mark_node;
9576 : : }
9577 : : else
9578 : : ret = t;
9579 : : }
9580 : 66 : }
9581 : : return ret;
9582 : : }
9583 : :
9584 : : /* Return std::tuple_size<TYPE>::value. */
9585 : :
9586 : : static tree
9587 : 53010 : get_tuple_size (tree type)
9588 : : {
9589 : 53010 : tree args = make_tree_vec (1);
9590 : 53010 : TREE_VEC_ELT (args, 0) = type;
9591 : 53010 : tree inst = lookup_template_class (tuple_size_identifier, args,
9592 : : /*in_decl*/NULL_TREE,
9593 : : /*context*/std_node,
9594 : : tf_none);
9595 : 53010 : inst = complete_type (inst);
9596 : 53010 : if (inst == error_mark_node
9597 : 52489 : || !COMPLETE_TYPE_P (inst)
9598 : 87675 : || !CLASS_TYPE_P (type))
9599 : : return NULL_TREE;
9600 : 34665 : tree val = lookup_qualified_name (inst, value_identifier,
9601 : : LOOK_want::NORMAL, /*complain*/false);
9602 : 34665 : if (val == error_mark_node)
9603 : : return NULL_TREE;
9604 : 34659 : if (VAR_P (val) || TREE_CODE (val) == CONST_DECL)
9605 : 34659 : val = maybe_constant_value (val);
9606 : 34659 : if (TREE_CODE (val) == INTEGER_CST)
9607 : : return val;
9608 : : else
9609 : 0 : return error_mark_node;
9610 : : }
9611 : :
9612 : : /* Return std::tuple_element<I,TYPE>::type. */
9613 : :
9614 : : static tree
9615 : 37087 : get_tuple_element_type (tree type, unsigned i)
9616 : : {
9617 : 37087 : tree args = make_tree_vec (2);
9618 : 37087 : TREE_VEC_ELT (args, 0) = build_int_cst (integer_type_node, i);
9619 : 37087 : TREE_VEC_ELT (args, 1) = type;
9620 : 37087 : tree inst = lookup_template_class (tuple_element_identifier, args,
9621 : : /*in_decl*/NULL_TREE,
9622 : : /*context*/std_node,
9623 : : tf_warning_or_error);
9624 : 37087 : return make_typename_type (inst, type_identifier,
9625 : 37087 : none_type, tf_warning_or_error);
9626 : : }
9627 : :
9628 : : /* Return e.get<i>() or get<i>(e). */
9629 : :
9630 : : static tree
9631 : 37096 : get_tuple_decomp_init (tree decl, unsigned i)
9632 : : {
9633 : 37096 : tree targs = make_tree_vec (1);
9634 : 37096 : TREE_VEC_ELT (targs, 0) = build_int_cst (integer_type_node, i);
9635 : :
9636 : 37096 : tree etype = TREE_TYPE (decl);
9637 : 37096 : tree e = convert_from_reference (decl);
9638 : :
9639 : : /* [The id-expression] e is an lvalue if the type of the entity e is an
9640 : : lvalue reference and an xvalue otherwise. */
9641 : 37096 : if (!TYPE_REF_P (etype)
9642 : 37096 : || TYPE_REF_IS_RVALUE (etype))
9643 : 36661 : e = move (e);
9644 : :
9645 : 37096 : tree fns = lookup_qualified_name (TREE_TYPE (e), get__identifier,
9646 : : LOOK_want::NORMAL, /*complain*/false);
9647 : 37096 : bool use_member_get = false;
9648 : :
9649 : : /* To use a member get, member lookup must find at least one
9650 : : declaration that is a function template
9651 : : whose first template parameter is a non-type parameter. */
9652 : 110520 : for (lkp_iterator iter (MAYBE_BASELINK_FUNCTIONS (fns)); iter; ++iter)
9653 : : {
9654 : 37096 : tree fn = *iter;
9655 : 37096 : if (TREE_CODE (fn) == TEMPLATE_DECL)
9656 : : {
9657 : 771 : tree tparms = DECL_TEMPLATE_PARMS (fn);
9658 : 771 : tree parm = TREE_VEC_ELT (INNERMOST_TEMPLATE_PARMS (tparms), 0);
9659 : 771 : if (TREE_CODE (TREE_VALUE (parm)) == PARM_DECL)
9660 : : {
9661 : : use_member_get = true;
9662 : : break;
9663 : : }
9664 : : }
9665 : : }
9666 : :
9667 : 37096 : if (use_member_get)
9668 : : {
9669 : 768 : fns = lookup_template_function (fns, targs);
9670 : 768 : return build_new_method_call (e, fns, /*args*/NULL,
9671 : : /*path*/NULL_TREE, LOOKUP_NORMAL,
9672 : 768 : /*fn_p*/NULL, tf_warning_or_error);
9673 : : }
9674 : : else
9675 : : {
9676 : 36328 : releasing_vec args (make_tree_vector_single (e));
9677 : 36328 : fns = lookup_template_function (get__identifier, targs);
9678 : 36328 : fns = perform_koenig_lookup (fns, args, tf_warning_or_error);
9679 : 36328 : return finish_call_expr (fns, &args, /*novirt*/false,
9680 : : /*koenig*/true, tf_warning_or_error);
9681 : 36328 : }
9682 : : }
9683 : :
9684 : : /* It's impossible to recover the decltype of a tuple decomposition variable
9685 : : based on the actual type of the variable, so store it in a hash table. */
9686 : :
9687 : : static GTY((cache)) decl_tree_cache_map *decomp_type_table;
9688 : :
9689 : : tree
9690 : 54 : lookup_decomp_type (tree v)
9691 : : {
9692 : 54 : if (decomp_type_table)
9693 : 51 : if (tree *slot = decomp_type_table->get (v))
9694 : 51 : return *slot;
9695 : : return NULL_TREE;
9696 : : }
9697 : :
9698 : : /* Mangle a decomposition declaration if needed. Arguments like
9699 : : in cp_finish_decomp. */
9700 : :
9701 : : static void
9702 : 30465 : cp_maybe_mangle_decomp (tree decl, cp_decomp *decomp)
9703 : : {
9704 : 30465 : if (!processing_template_decl
9705 : 30465 : && !error_operand_p (decl)
9706 : 60930 : && TREE_STATIC (decl))
9707 : : {
9708 : 247 : auto_vec<tree, 16> v;
9709 : 247 : v.safe_grow (decomp->count, true);
9710 : 247 : tree d = decomp->decl;
9711 : 810 : for (unsigned int i = 0; i < decomp->count; i++, d = DECL_CHAIN (d))
9712 : 563 : v[decomp->count - i - 1] = d;
9713 : 247 : if (DECL_FUNCTION_SCOPE_P (decl))
9714 : : {
9715 : : size_t sz = 3;
9716 : 238 : for (unsigned int i = 0; i < decomp->count; ++i)
9717 : 164 : sz += IDENTIFIER_LENGTH (DECL_NAME (v[i])) + 1;
9718 : 74 : char *name = XALLOCAVEC (char, sz);
9719 : 74 : name[0] = 'D';
9720 : 74 : name[1] = 'C';
9721 : 74 : char *p = name + 2;
9722 : 238 : for (unsigned int i = 0; i < decomp->count; ++i)
9723 : : {
9724 : 164 : size_t len = IDENTIFIER_LENGTH (DECL_NAME (v[i]));
9725 : 164 : *p++ = ' ';
9726 : 164 : memcpy (p, IDENTIFIER_POINTER (DECL_NAME (v[i])), len);
9727 : 164 : p += len;
9728 : : }
9729 : 74 : *p = '\0';
9730 : 74 : determine_local_discriminator (decl, get_identifier (name));
9731 : : }
9732 : 247 : SET_DECL_ASSEMBLER_NAME (decl, mangle_decomp (decl, v));
9733 : 247 : maybe_apply_pragma_weak (decl);
9734 : 247 : }
9735 : 30465 : }
9736 : :
9737 : : /* Finish a decomposition declaration. DECL is the underlying declaration
9738 : : "e", FIRST is the head of a chain of decls for the individual identifiers
9739 : : chained through DECL_CHAIN in reverse order and COUNT is the number of
9740 : : those decls. If TEST_P is true, return true if any code would need to be
9741 : : actually emitted but don't emit it. Return false otherwise. */
9742 : :
9743 : : bool
9744 : 110673 : cp_finish_decomp (tree decl, cp_decomp *decomp, bool test_p)
9745 : : {
9746 : 110673 : tree first = decomp->decl;
9747 : 110673 : unsigned count = decomp->count;
9748 : 110673 : if (error_operand_p (decl))
9749 : : {
9750 : 54 : error_out:
9751 : 436 : while (count--)
9752 : : {
9753 : 274 : TREE_TYPE (first) = error_mark_node;
9754 : 274 : if (DECL_HAS_VALUE_EXPR_P (first))
9755 : : {
9756 : 9 : SET_DECL_VALUE_EXPR (first, NULL_TREE);
9757 : 9 : DECL_HAS_VALUE_EXPR_P (first) = 0;
9758 : : }
9759 : 274 : first = DECL_CHAIN (first);
9760 : : }
9761 : 162 : if (DECL_P (decl) && DECL_NAMESPACE_SCOPE_P (decl))
9762 : 51 : SET_DECL_ASSEMBLER_NAME (decl, get_identifier ("<decomp>"));
9763 : 162 : return false;
9764 : : }
9765 : :
9766 : 110619 : location_t loc = DECL_SOURCE_LOCATION (decl);
9767 : 110619 : if (type_dependent_expression_p (decl)
9768 : : /* This happens for range for when not in templates.
9769 : : Still add the DECL_VALUE_EXPRs for later processing. */
9770 : 110619 : || (!processing_template_decl
9771 : 46717 : && type_uses_auto (TREE_TYPE (decl))))
9772 : : {
9773 : 171857 : for (unsigned int i = 0; i < count; i++)
9774 : : {
9775 : 114629 : if (!DECL_HAS_VALUE_EXPR_P (first))
9776 : : {
9777 : 114629 : tree v = build_nt (ARRAY_REF, decl,
9778 : 114629 : size_int (count - i - 1),
9779 : : NULL_TREE, NULL_TREE);
9780 : 114629 : SET_DECL_VALUE_EXPR (first, v);
9781 : 114629 : DECL_HAS_VALUE_EXPR_P (first) = 1;
9782 : : }
9783 : 114629 : if (processing_template_decl)
9784 : 114313 : fit_decomposition_lang_decl (first, decl);
9785 : 114629 : first = DECL_CHAIN (first);
9786 : : }
9787 : : return false;
9788 : : }
9789 : :
9790 : 53391 : auto_vec<tree, 16> v;
9791 : 53391 : v.safe_grow (count, true);
9792 : 53391 : tree d = first;
9793 : 160916 : for (unsigned int i = 0; i < count; i++, d = DECL_CHAIN (d))
9794 : : {
9795 : 107525 : v[count - i - 1] = d;
9796 : 107525 : fit_decomposition_lang_decl (d, decl);
9797 : : }
9798 : :
9799 : 53391 : tree type = TREE_TYPE (decl);
9800 : 53391 : tree dexp = decl;
9801 : :
9802 : 53391 : if (TYPE_REF_P (type))
9803 : : {
9804 : 615 : dexp = convert_from_reference (dexp);
9805 : 615 : type = complete_type (TREE_TYPE (type));
9806 : 615 : if (type == error_mark_node)
9807 : 108 : goto error_out;
9808 : 615 : if (!COMPLETE_TYPE_P (type))
9809 : : {
9810 : 3 : error_at (loc, "structured binding refers to incomplete type %qT",
9811 : : type);
9812 : 3 : goto error_out;
9813 : : }
9814 : : }
9815 : :
9816 : 53388 : tree eltype = NULL_TREE;
9817 : 53388 : unsigned HOST_WIDE_INT eltscnt = 0;
9818 : 53388 : if (TREE_CODE (type) == ARRAY_TYPE)
9819 : : {
9820 : 354 : tree nelts;
9821 : 354 : nelts = array_type_nelts_top (type);
9822 : 354 : if (nelts == error_mark_node)
9823 : 0 : goto error_out;
9824 : 354 : if (DECL_DECOMP_BASE (decl))
9825 : : {
9826 : 9 : error_at (loc, "array initializer for structured binding "
9827 : : "declaration in condition");
9828 : 9 : goto error_out;
9829 : : }
9830 : 345 : if (!tree_fits_uhwi_p (nelts))
9831 : : {
9832 : 0 : error_at (loc, "cannot decompose variable length array %qT", type);
9833 : 0 : goto error_out;
9834 : : }
9835 : 345 : eltscnt = tree_to_uhwi (nelts);
9836 : 345 : if (count != eltscnt)
9837 : : {
9838 : 8 : cnt_mismatch:
9839 : 23 : auto_diagnostic_group d;
9840 : 23 : if (count > eltscnt)
9841 : 12 : error_n (loc, count,
9842 : : "%u name provided for structured binding",
9843 : : "%u names provided for structured binding", count);
9844 : : else
9845 : 11 : error_n (loc, count,
9846 : : "only %u name provided for structured binding",
9847 : : "only %u names provided for structured binding", count);
9848 : 23 : inform_n (loc, eltscnt,
9849 : : "while %qT decomposes into %wu element",
9850 : : "while %qT decomposes into %wu elements",
9851 : : type, eltscnt);
9852 : 23 : goto error_out;
9853 : : }
9854 : 337 : eltype = TREE_TYPE (type);
9855 : 1155 : for (unsigned int i = 0; i < count; i++)
9856 : : {
9857 : 818 : TREE_TYPE (v[i]) = eltype;
9858 : 818 : layout_decl (v[i], 0);
9859 : 818 : if (processing_template_decl)
9860 : 60 : continue;
9861 : 758 : tree t = unshare_expr (dexp);
9862 : 758 : t = build4 (ARRAY_REF, eltype, t, size_int (i), NULL_TREE, NULL_TREE);
9863 : 758 : SET_DECL_VALUE_EXPR (v[i], t);
9864 : 758 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
9865 : : }
9866 : : }
9867 : : /* 2 GNU extensions. */
9868 : 53034 : else if (TREE_CODE (type) == COMPLEX_TYPE)
9869 : : {
9870 : 15 : eltscnt = 2;
9871 : 15 : if (count != eltscnt)
9872 : 0 : goto cnt_mismatch;
9873 : 15 : eltype = cp_build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type));
9874 : 45 : for (unsigned int i = 0; i < count; i++)
9875 : : {
9876 : 30 : TREE_TYPE (v[i]) = eltype;
9877 : 30 : layout_decl (v[i], 0);
9878 : 30 : if (processing_template_decl)
9879 : 0 : continue;
9880 : 30 : tree t = unshare_expr (dexp);
9881 : 45 : t = build1 (i ? IMAGPART_EXPR : REALPART_EXPR, eltype, t);
9882 : 30 : SET_DECL_VALUE_EXPR (v[i], t);
9883 : 30 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
9884 : : }
9885 : : }
9886 : 53019 : else if (TREE_CODE (type) == VECTOR_TYPE)
9887 : : {
9888 : 9 : if (!TYPE_VECTOR_SUBPARTS (type).is_constant (&eltscnt))
9889 : : {
9890 : : error_at (loc, "cannot decompose variable length vector %qT", type);
9891 : : goto error_out;
9892 : : }
9893 : 9 : if (count != eltscnt)
9894 : 0 : goto cnt_mismatch;
9895 : 9 : eltype = cp_build_qualified_type (TREE_TYPE (type), TYPE_QUALS (type));
9896 : 45 : for (unsigned int i = 0; i < count; i++)
9897 : : {
9898 : 36 : TREE_TYPE (v[i]) = eltype;
9899 : 36 : layout_decl (v[i], 0);
9900 : 36 : if (processing_template_decl)
9901 : 0 : continue;
9902 : 36 : tree t = unshare_expr (dexp);
9903 : 36 : convert_vector_to_array_for_subscript (DECL_SOURCE_LOCATION (v[i]),
9904 : 36 : &t, size_int (i));
9905 : 36 : t = build4 (ARRAY_REF, eltype, t, size_int (i), NULL_TREE, NULL_TREE);
9906 : 36 : SET_DECL_VALUE_EXPR (v[i], t);
9907 : 36 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
9908 : : }
9909 : : }
9910 : 53010 : else if (tree tsize = get_tuple_size (type))
9911 : : {
9912 : 34659 : if (tsize == error_mark_node)
9913 : : {
9914 : 0 : error_at (loc, "%<std::tuple_size<%T>::value%> is not an integral "
9915 : : "constant expression", type);
9916 : 0 : goto error_out;
9917 : : }
9918 : 34659 : if (!tree_fits_uhwi_p (tsize))
9919 : : {
9920 : 12 : auto_diagnostic_group d;
9921 : 12 : error_n (loc, count,
9922 : : "%u name provided for structured binding",
9923 : : "%u names provided for structured binding", count);
9924 : 12 : inform (loc, "while %qT decomposes into %E elements",
9925 : : type, tsize);
9926 : 12 : goto error_out;
9927 : 12 : }
9928 : 34647 : eltscnt = tree_to_uhwi (tsize);
9929 : 34647 : if (count != eltscnt)
9930 : 3 : goto cnt_mismatch;
9931 : 34644 : if (test_p)
9932 : 53283 : return true;
9933 : 18486 : if (!processing_template_decl && DECL_DECOMP_BASE (decl))
9934 : : {
9935 : : /* For structured bindings used in conditions we need to evaluate
9936 : : the conversion of decl (aka e in the standard) to bool or
9937 : : integral/enumeral type (the latter for switch conditions)
9938 : : before the get methods. */
9939 : 72 : tree cond = convert_from_reference (decl);
9940 : 72 : if (integer_onep (DECL_DECOMP_BASE (decl)))
9941 : : /* switch condition. */
9942 : 18 : cond = build_expr_type_conversion (WANT_INT | WANT_ENUM,
9943 : : cond, true);
9944 : : else
9945 : : /* if/while/for condition. */
9946 : 54 : cond = contextual_conv_bool (cond, tf_warning_or_error);
9947 : 72 : if (cond && !error_operand_p (cond))
9948 : : {
9949 : : /* Wrap that value into a TARGET_EXPR, emit it right
9950 : : away and save for later uses in the cp_parse_condition
9951 : : or its instantiation. */
9952 : 72 : cond = get_target_expr (cond);
9953 : 72 : add_stmt (cond);
9954 : 72 : DECL_DECOMP_BASE (decl) = cond;
9955 : : }
9956 : : }
9957 : 18486 : int save_read = DECL_READ_P (decl);
9958 : 55561 : for (unsigned i = 0; i < count; ++i)
9959 : : {
9960 : 37096 : location_t sloc = input_location;
9961 : 37096 : location_t dloc = DECL_SOURCE_LOCATION (v[i]);
9962 : :
9963 : 37096 : input_location = dloc;
9964 : 37096 : tree init = get_tuple_decomp_init (decl, i);
9965 : 37096 : tree eltype = (init == error_mark_node ? error_mark_node
9966 : 37087 : : get_tuple_element_type (type, i));
9967 : 37096 : input_location = sloc;
9968 : :
9969 : 37096 : if (VOID_TYPE_P (eltype))
9970 : : {
9971 : 3 : error ("%<std::tuple_element<%u, %T>::type%> is %<void%>",
9972 : : i, type);
9973 : 3 : eltype = error_mark_node;
9974 : : }
9975 : 37096 : if (init == error_mark_node || eltype == error_mark_node)
9976 : : {
9977 : 21 : inform (dloc, "in initialization of structured binding "
9978 : 21 : "variable %qD", v[i]);
9979 : 21 : goto error_out;
9980 : : }
9981 : : /* Save the decltype away before reference collapse. */
9982 : 37075 : hash_map_safe_put<hm_ggc> (decomp_type_table, v[i], eltype);
9983 : 37075 : eltype = cp_build_reference_type (eltype, !lvalue_p (init));
9984 : 37075 : TREE_TYPE (v[i]) = eltype;
9985 : 37075 : layout_decl (v[i], 0);
9986 : 37075 : if (DECL_HAS_VALUE_EXPR_P (v[i]))
9987 : : {
9988 : : /* In this case the names are variables, not just proxies. */
9989 : 202 : SET_DECL_VALUE_EXPR (v[i], NULL_TREE);
9990 : 202 : DECL_HAS_VALUE_EXPR_P (v[i]) = 0;
9991 : : }
9992 : 37075 : if (!processing_template_decl)
9993 : : {
9994 : 32369 : copy_linkage (v[i], decl);
9995 : 32369 : cp_finish_decl (v[i], init, /*constexpr*/false,
9996 : : /*asm*/NULL_TREE, LOOKUP_NORMAL);
9997 : : }
9998 : : }
9999 : : /* Ignore reads from the underlying decl performed during initialization
10000 : : of the individual variables. If those will be read, we'll mark
10001 : : the underlying decl as read at that point. */
10002 : 18465 : DECL_READ_P (decl) = save_read;
10003 : : }
10004 : 18351 : else if (TREE_CODE (type) == UNION_TYPE)
10005 : : {
10006 : 3 : error_at (loc, "cannot decompose union type %qT", type);
10007 : 3 : goto error_out;
10008 : : }
10009 : 18348 : else if (!CLASS_TYPE_P (type))
10010 : : {
10011 : 16 : error_at (loc, "cannot decompose non-array non-class type %qT", type);
10012 : 16 : goto error_out;
10013 : : }
10014 : 18332 : else if (processing_template_decl && complete_type (type) == error_mark_node)
10015 : 0 : goto error_out;
10016 : 18332 : else if (processing_template_decl && !COMPLETE_TYPE_P (type))
10017 : 2 : pedwarn (loc, 0, "structured binding refers to incomplete class type %qT",
10018 : : type);
10019 : : else
10020 : : {
10021 : 18330 : tree btype = find_decomp_class_base (loc, type, NULL_TREE);
10022 : 18330 : if (btype == error_mark_node)
10023 : 21 : goto error_out;
10024 : 18309 : else if (btype == NULL_TREE)
10025 : : {
10026 : 0 : error_at (loc, "cannot decompose class type %qT without non-static "
10027 : : "data members", type);
10028 : 0 : goto error_out;
10029 : : }
10030 : 247030 : for (tree field = TYPE_FIELDS (btype); field; field = TREE_CHAIN (field))
10031 : 420451 : if (TREE_CODE (field) != FIELD_DECL
10032 : 37007 : || DECL_ARTIFICIAL (field)
10033 : 265724 : || DECL_UNNAMED_BIT_FIELD (field))
10034 : 191730 : continue;
10035 : : else
10036 : 36991 : eltscnt++;
10037 : 18309 : if (count != eltscnt)
10038 : 12 : goto cnt_mismatch;
10039 : 18297 : tree t = dexp;
10040 : 18297 : if (type != btype)
10041 : : {
10042 : 18 : t = convert_to_base (t, btype, /*check_access*/true,
10043 : : /*nonnull*/false, tf_warning_or_error);
10044 : 18 : type = btype;
10045 : : }
10046 : 18297 : unsigned int i = 0;
10047 : 246837 : for (tree field = TYPE_FIELDS (btype); field; field = TREE_CHAIN (field))
10048 : 420114 : if (TREE_CODE (field) != FIELD_DECL
10049 : 36982 : || DECL_ARTIFICIAL (field)
10050 : 265518 : || DECL_UNNAMED_BIT_FIELD (field))
10051 : 191574 : continue;
10052 : : else
10053 : : {
10054 : 36966 : tree tt = finish_non_static_data_member (field, unshare_expr (t),
10055 : : NULL_TREE);
10056 : 36966 : if (REFERENCE_REF_P (tt))
10057 : 30 : tt = TREE_OPERAND (tt, 0);
10058 : 36966 : TREE_TYPE (v[i]) = TREE_TYPE (tt);
10059 : 36966 : layout_decl (v[i], 0);
10060 : 36966 : if (!processing_template_decl)
10061 : : {
10062 : 28139 : SET_DECL_VALUE_EXPR (v[i], tt);
10063 : 28139 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
10064 : : }
10065 : 36966 : i++;
10066 : : }
10067 : : }
10068 : 37125 : if (processing_template_decl)
10069 : : {
10070 : 20354 : for (unsigned int i = 0; i < count; i++)
10071 : 13595 : if (!DECL_HAS_VALUE_EXPR_P (v[i]))
10072 : : {
10073 : 13460 : tree a = build_nt (ARRAY_REF, decl, size_int (i),
10074 : : NULL_TREE, NULL_TREE);
10075 : 13460 : SET_DECL_VALUE_EXPR (v[i], a);
10076 : 13460 : DECL_HAS_VALUE_EXPR_P (v[i]) = 1;
10077 : : }
10078 : : }
10079 : : return false;
10080 : : }
10081 : :
10082 : : /* Returns a declaration for a VAR_DECL as if:
10083 : :
10084 : : extern "C" TYPE NAME;
10085 : :
10086 : : had been seen. Used to create compiler-generated global
10087 : : variables. */
10088 : :
10089 : : static tree
10090 : 1982 : declare_global_var (tree name, tree type)
10091 : : {
10092 : 1982 : auto cookie = push_abi_namespace (global_namespace);
10093 : 1982 : tree decl = build_decl (input_location, VAR_DECL, name, type);
10094 : 1982 : TREE_PUBLIC (decl) = 1;
10095 : 1982 : DECL_EXTERNAL (decl) = 1;
10096 : 1982 : DECL_ARTIFICIAL (decl) = 1;
10097 : 1982 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
10098 : : /* If the user has explicitly declared this variable (perhaps
10099 : : because the code we are compiling is part of a low-level runtime
10100 : : library), then it is possible that our declaration will be merged
10101 : : with theirs by pushdecl. */
10102 : 1982 : decl = pushdecl (decl);
10103 : 1982 : cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
10104 : 1982 : pop_abi_namespace (cookie, global_namespace);
10105 : :
10106 : 1982 : return decl;
10107 : : }
10108 : :
10109 : : /* Returns the type for the argument to "atexit" corresponding to the function
10110 : : to be called when the program exits. */
10111 : :
10112 : : static tree
10113 : 24 : get_atexit_fn_ptr_type ()
10114 : : {
10115 : 24 : if (!atexit_fn_ptr_type_node)
10116 : : {
10117 : 12 : tree fn_type = build_function_type_list (void_type_node, NULL_TREE);
10118 : 12 : atexit_fn_ptr_type_node = build_pointer_type (fn_type);
10119 : : }
10120 : :
10121 : 24 : return atexit_fn_ptr_type_node;
10122 : : }
10123 : :
10124 : : /* Returns the type for the argument to "__cxa_atexit", "__cxa_thread_atexit"
10125 : : or "__cxa_throw" corresponding to the destructor to be called when the
10126 : : program exits. */
10127 : :
10128 : : tree
10129 : 17073 : get_cxa_atexit_fn_ptr_type ()
10130 : : {
10131 : 17073 : if (!cleanup_type)
10132 : : {
10133 : 13163 : tree fntype = build_function_type_list (void_type_node,
10134 : : ptr_type_node, NULL_TREE);
10135 : 13163 : fntype = targetm.cxx.adjust_cdtor_callabi_fntype (fntype);
10136 : 13163 : cleanup_type = build_pointer_type (fntype);
10137 : : }
10138 : :
10139 : 17073 : return cleanup_type;
10140 : : }
10141 : :
10142 : : /* Returns a pointer to the `atexit' function. Note that if
10143 : : FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
10144 : : `__cxa_atexit' function specified in the IA64 C++ ABI. */
10145 : :
10146 : : static tree
10147 : 2844 : get_atexit_node (void)
10148 : : {
10149 : 2844 : tree atexit_fndecl;
10150 : 2844 : tree fn_type;
10151 : 2844 : tree fn_ptr_type;
10152 : 2844 : const char *name;
10153 : 2844 : bool use_aeabi_atexit;
10154 : 2844 : tree ctx = global_namespace;
10155 : :
10156 : 2844 : if (atexit_node)
10157 : : return atexit_node;
10158 : :
10159 : 1958 : if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
10160 : : {
10161 : : /* The declaration for `__cxa_atexit' is:
10162 : :
10163 : : int __cxa_atexit (void (*)(void *), void *, void *)
10164 : :
10165 : : We build up the argument types and then the function type
10166 : : itself. */
10167 : 1946 : tree argtype0, argtype1, argtype2;
10168 : :
10169 : 1946 : use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
10170 : : /* First, build the pointer-to-function type for the first
10171 : : argument. */
10172 : 1946 : fn_ptr_type = get_cxa_atexit_fn_ptr_type ();
10173 : : /* Then, build the rest of the argument types. */
10174 : 1946 : argtype2 = ptr_type_node;
10175 : 1946 : if (use_aeabi_atexit)
10176 : : {
10177 : : argtype1 = fn_ptr_type;
10178 : : argtype0 = ptr_type_node;
10179 : : }
10180 : : else
10181 : : {
10182 : 1946 : argtype1 = ptr_type_node;
10183 : 1946 : argtype0 = fn_ptr_type;
10184 : : }
10185 : : /* And the final __cxa_atexit type. */
10186 : 1946 : fn_type = build_function_type_list (integer_type_node,
10187 : : argtype0, argtype1, argtype2,
10188 : : NULL_TREE);
10189 : : /* ... which needs noexcept. */
10190 : 1946 : fn_type = build_exception_variant (fn_type, noexcept_true_spec);
10191 : 1946 : if (use_aeabi_atexit)
10192 : : {
10193 : 0 : name = "__aeabi_atexit";
10194 : 0 : push_to_top_level ();
10195 : 0 : int n = push_namespace (get_identifier ("__aeabiv1"), false);
10196 : 0 : ctx = current_namespace;
10197 : 0 : while (n--)
10198 : 0 : pop_namespace ();
10199 : 0 : pop_from_top_level ();
10200 : : }
10201 : : else
10202 : : {
10203 : 1946 : name = "__cxa_atexit";
10204 : 1946 : ctx = abi_node;
10205 : : }
10206 : : }
10207 : : else
10208 : : {
10209 : : /* The declaration for `atexit' is:
10210 : :
10211 : : int atexit (void (*)());
10212 : :
10213 : : We build up the argument types and then the function type
10214 : : itself. */
10215 : 12 : fn_ptr_type = get_atexit_fn_ptr_type ();
10216 : : /* Build the final atexit type. */
10217 : 12 : fn_type = build_function_type_list (integer_type_node,
10218 : : fn_ptr_type, NULL_TREE);
10219 : : /* ... which needs noexcept. */
10220 : 12 : fn_type = build_exception_variant (fn_type, noexcept_true_spec);
10221 : 12 : name = "atexit";
10222 : : }
10223 : :
10224 : : /* Now, build the function declaration. */
10225 : 1958 : push_lang_context (lang_name_c);
10226 : 1958 : auto cookie = push_abi_namespace (ctx);
10227 : 1958 : atexit_fndecl = build_library_fn_ptr (name, fn_type, ECF_LEAF | ECF_NOTHROW);
10228 : 1958 : DECL_CONTEXT (atexit_fndecl) = FROB_CONTEXT (current_namespace);
10229 : : /* Install as hidden builtin so we're (a) more relaxed about
10230 : : exception spec matching and (b) will not give a confusing location
10231 : : in diagnostic and (c) won't magically appear in user-visible name
10232 : : lookups. */
10233 : 1958 : DECL_SOURCE_LOCATION (atexit_fndecl) = BUILTINS_LOCATION;
10234 : 1958 : atexit_fndecl = pushdecl (atexit_fndecl, /*hiding=*/true);
10235 : 1958 : pop_abi_namespace (cookie, ctx);
10236 : 1958 : mark_used (atexit_fndecl);
10237 : 1958 : pop_lang_context ();
10238 : 1958 : atexit_node = decay_conversion (atexit_fndecl, tf_warning_or_error);
10239 : :
10240 : 1958 : return atexit_node;
10241 : : }
10242 : :
10243 : : /* Like get_atexit_node, but for thread-local cleanups. */
10244 : :
10245 : : static tree
10246 : 55 : get_thread_atexit_node (void)
10247 : : {
10248 : 55 : if (thread_atexit_node)
10249 : : return thread_atexit_node;
10250 : :
10251 : : /* The declaration for `__cxa_thread_atexit' is:
10252 : :
10253 : : int __cxa_thread_atexit (void (*)(void *), void *, void *) */
10254 : 46 : tree fn_type = build_function_type_list (integer_type_node,
10255 : : get_cxa_atexit_fn_ptr_type (),
10256 : : ptr_type_node, ptr_type_node,
10257 : : NULL_TREE);
10258 : :
10259 : : /* Now, build the function declaration, as with __cxa_atexit. */
10260 : 46 : unsigned flags = push_abi_namespace ();
10261 : 46 : tree atexit_fndecl = build_library_fn_ptr ("__cxa_thread_atexit", fn_type,
10262 : : ECF_LEAF | ECF_NOTHROW);
10263 : 46 : DECL_CONTEXT (atexit_fndecl) = FROB_CONTEXT (current_namespace);
10264 : 46 : DECL_SOURCE_LOCATION (atexit_fndecl) = BUILTINS_LOCATION;
10265 : 46 : atexit_fndecl = pushdecl (atexit_fndecl, /*hiding=*/true);
10266 : 46 : pop_abi_namespace (flags);
10267 : 46 : mark_used (atexit_fndecl);
10268 : 46 : thread_atexit_node = decay_conversion (atexit_fndecl, tf_warning_or_error);
10269 : :
10270 : 46 : return thread_atexit_node;
10271 : : }
10272 : :
10273 : : /* Returns the __dso_handle VAR_DECL. */
10274 : :
10275 : : static tree
10276 : 2887 : get_dso_handle_node (void)
10277 : : {
10278 : 2887 : if (dso_handle_node)
10279 : : return dso_handle_node;
10280 : :
10281 : : /* Declare the variable. */
10282 : 1982 : dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
10283 : : ptr_type_node);
10284 : :
10285 : : #ifdef HAVE_GAS_HIDDEN
10286 : 1982 : if (dso_handle_node != error_mark_node)
10287 : : {
10288 : 1979 : DECL_VISIBILITY (dso_handle_node) = VISIBILITY_HIDDEN;
10289 : 1979 : DECL_VISIBILITY_SPECIFIED (dso_handle_node) = 1;
10290 : : }
10291 : : #endif
10292 : :
10293 : 1982 : return dso_handle_node;
10294 : : }
10295 : :
10296 : : /* Begin a new function with internal linkage whose job will be simply
10297 : : to destroy some particular variable. OB_PARM is true if object pointer
10298 : : is passed to the cleanup function, otherwise no argument is passed. */
10299 : :
10300 : : static GTY(()) int start_cleanup_cnt;
10301 : :
10302 : : static tree
10303 : 354 : start_cleanup_fn (bool ob_parm)
10304 : : {
10305 : 354 : char name[32];
10306 : :
10307 : 354 : push_to_top_level ();
10308 : :
10309 : : /* No need to mangle this. */
10310 : 354 : push_lang_context (lang_name_c);
10311 : :
10312 : : /* Build the name of the function. */
10313 : 354 : sprintf (name, "__tcf_%d", start_cleanup_cnt++);
10314 : 354 : tree fntype = TREE_TYPE (ob_parm ? get_cxa_atexit_fn_ptr_type ()
10315 : : : get_atexit_fn_ptr_type ());
10316 : : /* Build the function declaration. */
10317 : 354 : tree fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
10318 : 354 : DECL_CONTEXT (fndecl) = FROB_CONTEXT (current_namespace);
10319 : : /* It's a function with internal linkage, generated by the
10320 : : compiler. */
10321 : 354 : TREE_PUBLIC (fndecl) = 0;
10322 : 354 : DECL_ARTIFICIAL (fndecl) = 1;
10323 : : /* Make the function `inline' so that it is only emitted if it is
10324 : : actually needed. It is unlikely that it will be inlined, since
10325 : : it is only called via a function pointer, but we avoid unnecessary
10326 : : emissions this way. */
10327 : 354 : DECL_DECLARED_INLINE_P (fndecl) = 1;
10328 : 354 : DECL_INTERFACE_KNOWN (fndecl) = 1;
10329 : 354 : if (ob_parm)
10330 : : {
10331 : : /* Build the parameter. */
10332 : 342 : tree parmdecl = cp_build_parm_decl (fndecl, NULL_TREE, ptr_type_node);
10333 : 342 : TREE_USED (parmdecl) = 1;
10334 : 342 : DECL_READ_P (parmdecl) = 1;
10335 : 342 : DECL_ARGUMENTS (fndecl) = parmdecl;
10336 : : }
10337 : :
10338 : 354 : fndecl = pushdecl (fndecl, /*hidden=*/true);
10339 : 354 : start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
10340 : :
10341 : 354 : pop_lang_context ();
10342 : :
10343 : 354 : return current_function_decl;
10344 : : }
10345 : :
10346 : : /* Finish the cleanup function begun by start_cleanup_fn. */
10347 : :
10348 : : static void
10349 : 354 : end_cleanup_fn (void)
10350 : : {
10351 : 354 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
10352 : :
10353 : 354 : pop_from_top_level ();
10354 : 354 : }
10355 : :
10356 : : /* Generate code to handle the destruction of DECL, an object with
10357 : : static storage duration. */
10358 : :
10359 : : tree
10360 : 13074 : register_dtor_fn (tree decl)
10361 : : {
10362 : 13074 : tree cleanup;
10363 : 13074 : tree addr;
10364 : 13074 : tree compound_stmt;
10365 : 13074 : tree fcall;
10366 : 13074 : tree type;
10367 : 13074 : bool ob_parm, dso_parm, use_dtor;
10368 : 13074 : tree arg0, arg1, arg2;
10369 : 13074 : tree atex_node;
10370 : :
10371 : 13074 : type = TREE_TYPE (decl);
10372 : 13074 : if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
10373 : 10175 : return void_node;
10374 : :
10375 : 2899 : if (decl_maybe_constant_destruction (decl, type)
10376 : 2899 : && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
10377 : : {
10378 : 0 : cxx_maybe_build_cleanup (decl, tf_warning_or_error);
10379 : 0 : return void_node;
10380 : : }
10381 : :
10382 : : /* If we're using "__cxa_atexit" (or "__cxa_thread_atexit" or
10383 : : "__aeabi_atexit"), and DECL is a class object, we can just pass the
10384 : : destructor to "__cxa_atexit"; we don't have to build a temporary
10385 : : function to do the cleanup. */
10386 : 5798 : dso_parm = (flag_use_cxa_atexit
10387 : 2899 : && !targetm.cxx.use_atexit_for_cxa_atexit ());
10388 : 2899 : ob_parm = (CP_DECL_THREAD_LOCAL_P (decl) || dso_parm);
10389 : 2887 : use_dtor = ob_parm && CLASS_TYPE_P (type);
10390 : 2899 : if (use_dtor)
10391 : : {
10392 : 2545 : cleanup = get_class_binding (type, complete_dtor_identifier);
10393 : :
10394 : : /* Make sure it is accessible. */
10395 : 2545 : perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup,
10396 : : tf_warning_or_error);
10397 : : }
10398 : : else
10399 : : {
10400 : : /* Call build_cleanup before we enter the anonymous function so
10401 : : that any access checks will be done relative to the current
10402 : : scope, rather than the scope of the anonymous function. */
10403 : 354 : build_cleanup (decl);
10404 : :
10405 : : /* Now start the function. */
10406 : 354 : cleanup = start_cleanup_fn (ob_parm);
10407 : :
10408 : : /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
10409 : : to the original function, rather than the anonymous one. That
10410 : : will make the back end think that nested functions are in use,
10411 : : which causes confusion. */
10412 : 354 : push_deferring_access_checks (dk_no_check);
10413 : 354 : fcall = build_cleanup (decl);
10414 : 354 : pop_deferring_access_checks ();
10415 : :
10416 : : /* Create the body of the anonymous function. */
10417 : 354 : compound_stmt = begin_compound_stmt (BCS_FN_BODY);
10418 : 354 : finish_expr_stmt (fcall);
10419 : 354 : finish_compound_stmt (compound_stmt);
10420 : 354 : end_cleanup_fn ();
10421 : : }
10422 : :
10423 : : /* Call atexit with the cleanup function. */
10424 : 2899 : mark_used (cleanup);
10425 : 2899 : cleanup = build_address (cleanup);
10426 : :
10427 : 2899 : if (CP_DECL_THREAD_LOCAL_P (decl))
10428 : 55 : atex_node = get_thread_atexit_node ();
10429 : : else
10430 : 2844 : atex_node = get_atexit_node ();
10431 : :
10432 : 2899 : if (use_dtor)
10433 : : {
10434 : : /* We must convert CLEANUP to the type that "__cxa_atexit"
10435 : : expects. */
10436 : 2545 : cleanup = build_nop (get_cxa_atexit_fn_ptr_type (), cleanup);
10437 : : /* "__cxa_atexit" will pass the address of DECL to the
10438 : : cleanup function. */
10439 : 2545 : mark_used (decl);
10440 : 2545 : addr = build_address (decl);
10441 : : /* The declared type of the parameter to "__cxa_atexit" is
10442 : : "void *". For plain "T*", we could just let the
10443 : : machinery in cp_build_function_call convert it -- but if the
10444 : : type is "cv-qualified T *", then we need to convert it
10445 : : before passing it in, to avoid spurious errors. */
10446 : 2545 : addr = build_nop (ptr_type_node, addr);
10447 : : }
10448 : : else
10449 : : /* Since the cleanup functions we build ignore the address
10450 : : they're given, there's no reason to pass the actual address
10451 : : in, and, in general, it's cheaper to pass NULL than any
10452 : : other value. */
10453 : 354 : addr = null_pointer_node;
10454 : :
10455 : 2899 : if (dso_parm)
10456 : 2887 : arg2 = cp_build_addr_expr (get_dso_handle_node (),
10457 : : tf_warning_or_error);
10458 : 12 : else if (ob_parm)
10459 : : /* Just pass NULL to the dso handle parm if we don't actually
10460 : : have a DSO handle on this target. */
10461 : 0 : arg2 = null_pointer_node;
10462 : : else
10463 : : arg2 = NULL_TREE;
10464 : :
10465 : 2887 : if (ob_parm)
10466 : : {
10467 : 2887 : if (!CP_DECL_THREAD_LOCAL_P (decl)
10468 : 2887 : && targetm.cxx.use_aeabi_atexit ())
10469 : : {
10470 : : arg1 = cleanup;
10471 : : arg0 = addr;
10472 : : }
10473 : : else
10474 : : {
10475 : : arg1 = addr;
10476 : : arg0 = cleanup;
10477 : : }
10478 : : }
10479 : : else
10480 : : {
10481 : : arg0 = cleanup;
10482 : : arg1 = NULL_TREE;
10483 : : }
10484 : 2899 : return cp_build_function_call_nary (atex_node, tf_warning_or_error,
10485 : 2899 : arg0, arg1, arg2, NULL_TREE);
10486 : : }
10487 : :
10488 : : /* DECL is a VAR_DECL with static storage duration. INIT, if present,
10489 : : is its initializer. Generate code to handle the construction
10490 : : and destruction of DECL. */
10491 : :
10492 : : static void
10493 : 13420962 : expand_static_init (tree decl, tree init)
10494 : : {
10495 : 13420962 : gcc_assert (VAR_P (decl));
10496 : 13420962 : gcc_assert (TREE_STATIC (decl));
10497 : :
10498 : : /* Some variables require no dynamic initialization. */
10499 : 13420962 : if (decl_maybe_constant_destruction (decl, TREE_TYPE (decl)))
10500 : : {
10501 : : /* Make sure the destructor is callable. */
10502 : 13418064 : cxx_maybe_build_cleanup (decl, tf_warning_or_error);
10503 : 13418064 : if (!init)
10504 : : return;
10505 : : }
10506 : :
10507 : 13684 : if (CP_DECL_THREAD_LOCAL_P (decl) && DECL_GNU_TLS_P (decl)
10508 : 13043 : && !DECL_FUNCTION_SCOPE_P (decl))
10509 : : {
10510 : 15 : auto_diagnostic_group d;
10511 : 15 : location_t dloc = DECL_SOURCE_LOCATION (decl);
10512 : 15 : if (init)
10513 : 12 : error_at (dloc, "non-local variable %qD declared %<__thread%> "
10514 : : "needs dynamic initialization", decl);
10515 : : else
10516 : 3 : error_at (dloc, "non-local variable %qD declared %<__thread%> "
10517 : : "has a non-trivial destructor", decl);
10518 : 15 : static bool informed;
10519 : 15 : if (!informed)
10520 : : {
10521 : 6 : inform (dloc, "C++11 %<thread_local%> allows dynamic "
10522 : : "initialization and destruction");
10523 : 6 : informed = true;
10524 : : }
10525 : 15 : return;
10526 : 15 : }
10527 : :
10528 : 13013 : if (DECL_FUNCTION_SCOPE_P (decl))
10529 : : {
10530 : : /* Emit code to perform this initialization but once. */
10531 : 3277 : tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
10532 : 3277 : tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
10533 : 3277 : tree guard, guard_addr;
10534 : 3277 : tree flag, begin;
10535 : : /* We don't need thread-safety code for thread-local vars. */
10536 : 3277 : bool thread_guard = (flag_threadsafe_statics
10537 : 3277 : && !CP_DECL_THREAD_LOCAL_P (decl));
10538 : :
10539 : : /* Emit code to perform this initialization but once. This code
10540 : : looks like:
10541 : :
10542 : : static <type> guard;
10543 : : if (!__atomic_load (guard.first_byte)) {
10544 : : if (__cxa_guard_acquire (&guard)) {
10545 : : bool flag = false;
10546 : : try {
10547 : : // Do initialization.
10548 : : flag = true; __cxa_guard_release (&guard);
10549 : : // Register variable for destruction at end of program.
10550 : : } catch {
10551 : : if (!flag) __cxa_guard_abort (&guard);
10552 : : }
10553 : : }
10554 : : }
10555 : :
10556 : : Note that the `flag' variable is only set to 1 *after* the
10557 : : initialization is complete. This ensures that an exception,
10558 : : thrown during the construction, will cause the variable to
10559 : : reinitialized when we pass through this code again, as per:
10560 : :
10561 : : [stmt.dcl]
10562 : :
10563 : : If the initialization exits by throwing an exception, the
10564 : : initialization is not complete, so it will be tried again
10565 : : the next time control enters the declaration.
10566 : :
10567 : : This process should be thread-safe, too; multiple threads
10568 : : should not be able to initialize the variable more than
10569 : : once. */
10570 : :
10571 : : /* Create the guard variable. */
10572 : 3277 : guard = get_guard (decl);
10573 : :
10574 : : /* Begin the conditional initialization. */
10575 : 3277 : if_stmt = begin_if_stmt ();
10576 : :
10577 : 3277 : finish_if_stmt_cond (get_guard_cond (guard, thread_guard), if_stmt);
10578 : 3277 : then_clause = begin_compound_stmt (BCS_NO_SCOPE);
10579 : :
10580 : 3277 : if (thread_guard)
10581 : : {
10582 : 3224 : tree vfntype = NULL_TREE;
10583 : 3224 : tree acquire_name, release_name, abort_name;
10584 : 3224 : tree acquire_fn, release_fn, abort_fn;
10585 : 3224 : guard_addr = build_address (guard);
10586 : :
10587 : 3224 : acquire_name = get_identifier ("__cxa_guard_acquire");
10588 : 3224 : release_name = get_identifier ("__cxa_guard_release");
10589 : 3224 : abort_name = get_identifier ("__cxa_guard_abort");
10590 : 3224 : acquire_fn = get_global_binding (acquire_name);
10591 : 3224 : release_fn = get_global_binding (release_name);
10592 : 3224 : abort_fn = get_global_binding (abort_name);
10593 : 3224 : if (!acquire_fn)
10594 : 1888 : acquire_fn = push_library_fn
10595 : 1888 : (acquire_name, build_function_type_list (integer_type_node,
10596 : 1888 : TREE_TYPE (guard_addr),
10597 : : NULL_TREE),
10598 : : NULL_TREE, ECF_NOTHROW);
10599 : 3224 : if (!release_fn || !abort_fn)
10600 : 1891 : vfntype = build_function_type_list (void_type_node,
10601 : 1891 : TREE_TYPE (guard_addr),
10602 : : NULL_TREE);
10603 : 1891 : if (!release_fn)
10604 : 1891 : release_fn = push_library_fn (release_name, vfntype, NULL_TREE,
10605 : : ECF_NOTHROW);
10606 : 3224 : if (!abort_fn)
10607 : 1891 : abort_fn = push_library_fn (abort_name, vfntype, NULL_TREE,
10608 : : ECF_NOTHROW | ECF_LEAF);
10609 : :
10610 : 3224 : inner_if_stmt = begin_if_stmt ();
10611 : 3224 : finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
10612 : : inner_if_stmt);
10613 : :
10614 : 3224 : inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
10615 : 3224 : begin = get_target_expr (boolean_false_node);
10616 : 3224 : flag = TARGET_EXPR_SLOT (begin);
10617 : :
10618 : 3224 : TARGET_EXPR_CLEANUP (begin)
10619 : 3224 : = build3 (COND_EXPR, void_type_node, flag,
10620 : : void_node,
10621 : : build_call_n (abort_fn, 1, guard_addr));
10622 : 3224 : CLEANUP_EH_ONLY (begin) = 1;
10623 : :
10624 : : /* Do the initialization itself. */
10625 : 3224 : init = add_stmt_to_compound (begin, init);
10626 : 3224 : init = add_stmt_to_compound (init,
10627 : : build2 (MODIFY_EXPR, void_type_node,
10628 : : flag, boolean_true_node));
10629 : :
10630 : : /* Use atexit to register a function for destroying this static
10631 : : variable. Do this before calling __cxa_guard_release. */
10632 : 3224 : init = add_stmt_to_compound (init, register_dtor_fn (decl));
10633 : :
10634 : 3224 : init = add_stmt_to_compound (init, build_call_n (release_fn, 1,
10635 : : guard_addr));
10636 : : }
10637 : : else
10638 : : {
10639 : 53 : init = add_stmt_to_compound (init, set_guard (guard));
10640 : :
10641 : : /* Use atexit to register a function for destroying this static
10642 : : variable. */
10643 : 53 : init = add_stmt_to_compound (init, register_dtor_fn (decl));
10644 : : }
10645 : :
10646 : 3277 : finish_expr_stmt (init);
10647 : :
10648 : 3277 : if (thread_guard)
10649 : : {
10650 : 3224 : finish_compound_stmt (inner_then_clause);
10651 : 3224 : finish_then_clause (inner_if_stmt);
10652 : 3224 : finish_if_stmt (inner_if_stmt);
10653 : : }
10654 : :
10655 : 3277 : finish_compound_stmt (then_clause);
10656 : 3277 : finish_then_clause (if_stmt);
10657 : 3277 : finish_if_stmt (if_stmt);
10658 : : }
10659 : 9736 : else if (CP_DECL_THREAD_LOCAL_P (decl))
10660 : 591 : tls_aggregates = tree_cons (init, decl, tls_aggregates);
10661 : : else
10662 : 9145 : static_aggregates = tree_cons (init, decl, static_aggregates);
10663 : : }
10664 : :
10665 : :
10666 : : /* Make TYPE a complete type based on INITIAL_VALUE.
10667 : : Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
10668 : : 2 if there was no information (in which case assume 0 if DO_DEFAULT),
10669 : : 3 if the initializer list is empty (in pedantic mode). */
10670 : :
10671 : : int
10672 : 474865 : cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
10673 : : {
10674 : 474865 : int failure;
10675 : 474865 : tree type, elt_type;
10676 : :
10677 : : /* Don't get confused by a CONSTRUCTOR for some other type. */
10678 : 474835 : if (initial_value && TREE_CODE (initial_value) == CONSTRUCTOR
10679 : 86562 : && !BRACE_ENCLOSED_INITIALIZER_P (initial_value)
10680 : 475176 : && TREE_CODE (TREE_TYPE (initial_value)) != ARRAY_TYPE)
10681 : : return 1;
10682 : :
10683 : 474862 : if (initial_value)
10684 : : {
10685 : : /* An array of character type can be initialized from a
10686 : : brace-enclosed string constant so call reshape_init to
10687 : : remove the optional braces from a braced string literal. */
10688 : 474832 : if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
10689 : 474832 : && BRACE_ENCLOSED_INITIALIZER_P (initial_value))
10690 : 26636 : initial_value = reshape_init (*ptype, initial_value,
10691 : : tf_warning_or_error);
10692 : :
10693 : : /* If any of the elements are parameter packs, we can't actually
10694 : : complete this type now because the array size is dependent. */
10695 : 474832 : if (TREE_CODE (initial_value) == CONSTRUCTOR)
10696 : 10348515 : for (auto &e: CONSTRUCTOR_ELTS (initial_value))
10697 : 10089197 : if (PACK_EXPANSION_P (e.value))
10698 : : return 0;
10699 : : }
10700 : :
10701 : 474862 : failure = complete_array_type (ptype, initial_value, do_default);
10702 : :
10703 : : /* We can create the array before the element type is complete, which
10704 : : means that we didn't have these two bits set in the original type
10705 : : either. In completing the type, we are expected to propagate these
10706 : : bits. See also complete_type which does the same thing for arrays
10707 : : of fixed size. */
10708 : 474862 : type = *ptype;
10709 : 949721 : if (type != error_mark_node && TYPE_DOMAIN (type))
10710 : : {
10711 : 474835 : elt_type = TREE_TYPE (type);
10712 : 474835 : TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
10713 : 949670 : TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
10714 : 474835 : = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
10715 : : }
10716 : :
10717 : : return failure;
10718 : : }
10719 : :
10720 : : /* As above, but either give an error or reject zero-size arrays, depending
10721 : : on COMPLAIN. */
10722 : :
10723 : : int
10724 : 706 : cp_complete_array_type_or_error (tree *ptype, tree initial_value,
10725 : : bool do_default, tsubst_flags_t complain)
10726 : : {
10727 : 706 : int failure;
10728 : 706 : bool sfinae = !(complain & tf_error);
10729 : : /* In SFINAE context we can't be lenient about zero-size arrays. */
10730 : 706 : if (sfinae)
10731 : 3 : ++pedantic;
10732 : 706 : failure = cp_complete_array_type (ptype, initial_value, do_default);
10733 : 706 : if (sfinae)
10734 : 3 : --pedantic;
10735 : 706 : if (failure)
10736 : : {
10737 : 3 : if (sfinae)
10738 : : /* Not an error. */;
10739 : 0 : else if (failure == 1)
10740 : 0 : error ("initializer fails to determine size of %qT", *ptype);
10741 : 0 : else if (failure == 2)
10742 : : {
10743 : 0 : if (do_default)
10744 : 0 : error ("array size missing in %qT", *ptype);
10745 : : }
10746 : 0 : else if (failure == 3)
10747 : 0 : error ("zero-size array %qT", *ptype);
10748 : 3 : *ptype = error_mark_node;
10749 : : }
10750 : 706 : return failure;
10751 : : }
10752 : :
10753 : : /* Return zero if something is declared to be a member of type
10754 : : CTYPE when in the context of CUR_TYPE. STRING is the error
10755 : : message to print in that case. Otherwise, quietly return 1. */
10756 : :
10757 : : static int
10758 : 22962231 : member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
10759 : : {
10760 : 22962231 : if (ctype && ctype != cur_type)
10761 : : {
10762 : 0 : if (flags == DTOR_FLAG)
10763 : 0 : error ("destructor for alien class %qT cannot be a member", ctype);
10764 : : else
10765 : 0 : error ("constructor for alien class %qT cannot be a member", ctype);
10766 : 0 : return 0;
10767 : : }
10768 : : return 1;
10769 : : }
10770 : :
10771 : : /* Subroutine of `grokdeclarator'. */
10772 : :
10773 : : /* Generate errors possibly applicable for a given set of specifiers.
10774 : : This is for ARM $7.1.2. */
10775 : :
10776 : : static void
10777 : 382072247 : bad_specifiers (tree object,
10778 : : enum bad_spec_place type,
10779 : : int virtualp,
10780 : : int quals,
10781 : : int inlinep,
10782 : : int friendp,
10783 : : int raises,
10784 : : const location_t* locations)
10785 : : {
10786 : 382072247 : switch (type)
10787 : : {
10788 : 53252193 : case BSP_VAR:
10789 : 53252193 : if (virtualp)
10790 : 0 : error_at (locations[ds_virtual],
10791 : : "%qD declared as a %<virtual%> variable", object);
10792 : 53252193 : if (quals)
10793 : 3 : error ("%<const%> and %<volatile%> function specifiers on "
10794 : : "%qD invalid in variable declaration", object);
10795 : : break;
10796 : 262090096 : case BSP_PARM:
10797 : 262090096 : if (virtualp)
10798 : 0 : error_at (locations[ds_virtual],
10799 : : "%qD declared as a %<virtual%> parameter", object);
10800 : 262090096 : if (inlinep)
10801 : 6 : error_at (locations[ds_inline],
10802 : : "%qD declared as an %<inline%> parameter", object);
10803 : 262090096 : if (quals)
10804 : 3 : error ("%<const%> and %<volatile%> function specifiers on "
10805 : : "%qD invalid in parameter declaration", object);
10806 : : break;
10807 : 41156397 : case BSP_TYPE:
10808 : 41156397 : if (virtualp)
10809 : 0 : error_at (locations[ds_virtual],
10810 : : "%qD declared as a %<virtual%> type", object);
10811 : 41156397 : if (inlinep)
10812 : 6 : error_at (locations[ds_inline],
10813 : : "%qD declared as an %<inline%> type", object);
10814 : 41156397 : if (quals)
10815 : 0 : error ("%<const%> and %<volatile%> function specifiers on "
10816 : : "%qD invalid in type declaration", object);
10817 : : break;
10818 : 25573561 : case BSP_FIELD:
10819 : 25573561 : if (virtualp)
10820 : 6 : error_at (locations[ds_virtual],
10821 : : "%qD declared as a %<virtual%> field", object);
10822 : 25573561 : if (inlinep)
10823 : 6 : error_at (locations[ds_inline],
10824 : : "%qD declared as an %<inline%> field", object);
10825 : 25573561 : if (quals)
10826 : 0 : error ("%<const%> and %<volatile%> function specifiers on "
10827 : : "%qD invalid in field declaration", object);
10828 : : break;
10829 : 0 : default:
10830 : 0 : gcc_unreachable();
10831 : : }
10832 : 382072247 : if (friendp)
10833 : 0 : error ("%q+D declared as a friend", object);
10834 : 382072247 : if (raises
10835 : 109 : && !flag_noexcept_type
10836 : 382072268 : && (TREE_CODE (object) == TYPE_DECL
10837 : 15 : || (!TYPE_PTRFN_P (TREE_TYPE (object))
10838 : 5 : && !TYPE_REFFN_P (TREE_TYPE (object))
10839 : 4 : && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
10840 : 6 : error ("%q+D declared with an exception specification", object);
10841 : 382072247 : }
10842 : :
10843 : : /* DECL is a member function or static data member and is presently
10844 : : being defined. Check that the definition is taking place in a
10845 : : valid namespace. */
10846 : :
10847 : : static void
10848 : 79025336 : check_class_member_definition_namespace (tree decl)
10849 : : {
10850 : : /* These checks only apply to member functions and static data
10851 : : members. */
10852 : 79025336 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
10853 : : /* We check for problems with specializations in pt.cc in
10854 : : check_specialization_namespace, where we can issue better
10855 : : diagnostics. */
10856 : 79025336 : if (processing_specialization)
10857 : : return;
10858 : : /* We check this in check_explicit_instantiation_namespace. */
10859 : 78873191 : if (processing_explicit_instantiation)
10860 : : return;
10861 : : /* [class.mfct]
10862 : :
10863 : : A member function definition that appears outside of the
10864 : : class definition shall appear in a namespace scope enclosing
10865 : : the class definition.
10866 : :
10867 : : [class.static.data]
10868 : :
10869 : : The definition for a static data member shall appear in a
10870 : : namespace scope enclosing the member's class definition. */
10871 : 78873128 : if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
10872 : 18 : permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
10873 : 18 : decl, DECL_CONTEXT (decl));
10874 : : }
10875 : :
10876 : : /* Build a PARM_DECL for the "this" parameter of FN. TYPE is the
10877 : : METHOD_TYPE for a non-static member function; QUALS are the
10878 : : cv-qualifiers that apply to the function. */
10879 : :
10880 : : tree
10881 : 193426363 : build_this_parm (tree fn, tree type, cp_cv_quals quals)
10882 : : {
10883 : 193426363 : tree this_type;
10884 : 193426363 : tree qual_type;
10885 : 193426363 : tree parm;
10886 : 193426363 : cp_cv_quals this_quals;
10887 : :
10888 : 193426363 : if (CLASS_TYPE_P (type))
10889 : : {
10890 : 87183379 : this_type
10891 : 87183379 : = cp_build_qualified_type (type, quals & ~TYPE_QUAL_RESTRICT);
10892 : 87183379 : this_type = build_pointer_type (this_type);
10893 : : }
10894 : : else
10895 : 106242984 : this_type = type_of_this_parm (type);
10896 : : /* The `this' parameter is implicitly `const'; it cannot be
10897 : : assigned to. */
10898 : 193426363 : this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
10899 : 193426363 : qual_type = cp_build_qualified_type (this_type, this_quals);
10900 : 193426363 : parm = build_artificial_parm (fn, this_identifier, qual_type);
10901 : 193426363 : cp_apply_type_quals_to_decl (this_quals, parm);
10902 : 193426363 : return parm;
10903 : : }
10904 : :
10905 : : /* DECL is a static member function. Complain if it was declared
10906 : : with function-cv-quals. */
10907 : :
10908 : : static void
10909 : 8169949 : check_static_quals (tree decl, cp_cv_quals quals)
10910 : : {
10911 : 0 : if (quals != TYPE_UNQUALIFIED)
10912 : 6 : error ("static member function %q#D declared with type qualifiers",
10913 : : decl);
10914 : 0 : }
10915 : :
10916 : : /* Helper function. Replace the temporary this parameter injected
10917 : : during cp_finish_omp_declare_simd with the real this parameter. */
10918 : :
10919 : : static tree
10920 : 2362 : declare_simd_adjust_this (tree *tp, int *walk_subtrees, void *data)
10921 : : {
10922 : 2362 : tree this_parm = (tree) data;
10923 : 2362 : if (TREE_CODE (*tp) == PARM_DECL
10924 : 432 : && DECL_NAME (*tp) == this_identifier
10925 : 2617 : && *tp != this_parm)
10926 : 255 : *tp = this_parm;
10927 : 2107 : else if (TYPE_P (*tp))
10928 : 33 : *walk_subtrees = 0;
10929 : 2362 : return NULL_TREE;
10930 : : }
10931 : :
10932 : : /* CTYPE is class type, or null if non-class.
10933 : : TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
10934 : : or METHOD_TYPE.
10935 : : DECLARATOR is the function's name.
10936 : : PARMS is a chain of PARM_DECLs for the function.
10937 : : VIRTUALP is truthvalue of whether the function is virtual or not.
10938 : : FLAGS are to be passed through to `grokclassfn'.
10939 : : QUALS are qualifiers indicating whether the function is `const'
10940 : : or `volatile'.
10941 : : RAISES is a list of exceptions that this function can raise.
10942 : : CHECK is 1 if we must find this method in CTYPE, 0 if we should
10943 : : not look, and -1 if we should not call `grokclassfn' at all.
10944 : :
10945 : : SFK is the kind of special function (if any) for the new function.
10946 : :
10947 : : Returns `NULL_TREE' if something goes wrong, after issuing
10948 : : applicable error messages. */
10949 : :
10950 : : static tree
10951 : 163058276 : grokfndecl (tree ctype,
10952 : : tree type,
10953 : : tree declarator,
10954 : : tree parms,
10955 : : tree orig_declarator,
10956 : : const cp_decl_specifier_seq *declspecs,
10957 : : tree decl_reqs,
10958 : : int virtualp,
10959 : : enum overload_flags flags,
10960 : : cp_cv_quals quals,
10961 : : cp_ref_qualifier rqual,
10962 : : tree raises,
10963 : : int check,
10964 : : int friendp,
10965 : : int publicp,
10966 : : int inlinep,
10967 : : bool deletedp,
10968 : : bool xobj_func_p,
10969 : : special_function_kind sfk,
10970 : : bool funcdef_flag,
10971 : : bool late_return_type_p,
10972 : : int template_count,
10973 : : tree in_namespace,
10974 : : tree* attrlist,
10975 : : location_t location)
10976 : : {
10977 : 163058276 : tree decl;
10978 : 163058276 : tree t;
10979 : :
10980 : 163058276 : if (location == UNKNOWN_LOCATION)
10981 : 0 : location = input_location;
10982 : :
10983 : : /* Was the concept specifier present? */
10984 : 163058276 : bool concept_p = inlinep & 4;
10985 : :
10986 : 163058276 : if (concept_p)
10987 : : {
10988 : 15 : error_at (location, "function concepts are no longer supported");
10989 : 15 : return NULL_TREE;
10990 : : }
10991 : :
10992 : 163058261 : type = build_cp_fntype_variant (type, rqual, raises, late_return_type_p);
10993 : :
10994 : 163058261 : decl = build_lang_decl_loc (location, FUNCTION_DECL, declarator, type);
10995 : :
10996 : : /* Set the constraints on the declaration. */
10997 : 163058261 : if (flag_concepts)
10998 : : {
10999 : 41879193 : tree tmpl_reqs = NULL_TREE;
11000 : 41879193 : tree ctx = friendp ? current_class_type : ctype;
11001 : 41879193 : bool block_local = TREE_CODE (current_scope ()) == FUNCTION_DECL;
11002 : 41879193 : bool memtmpl = (!block_local
11003 : 41879193 : && (current_template_depth
11004 : 41867945 : > template_class_depth (ctx)));
11005 : 11763770 : if (memtmpl)
11006 : : {
11007 : 11763770 : if (!current_template_parms)
11008 : : /* If there are no template parameters, something must have
11009 : : gone wrong. */
11010 : 0 : gcc_assert (seen_error ());
11011 : : else
11012 : 11763770 : tmpl_reqs = TEMPLATE_PARMS_CONSTRAINTS (current_template_parms);
11013 : : }
11014 : 41879193 : tree ci = build_constraints (tmpl_reqs, decl_reqs);
11015 : : /* C++20 CA378: Remove non-templated constrained functions. */
11016 : : /* [temp.friend]/9 A non-template friend declaration with a
11017 : : requires-clause shall be a definition. A friend function template with
11018 : : a constraint that depends on a template parameter from an enclosing
11019 : : template shall be a definition. */
11020 : 41879193 : if (ci
11021 : 2756255 : && (block_local
11022 : 2756252 : || !processing_template_decl
11023 : 2756197 : || (friendp && !memtmpl && !funcdef_flag)))
11024 : : {
11025 : 67 : if (!friendp || !processing_template_decl)
11026 : 58 : error_at (location, "constraints on a non-templated function");
11027 : : else
11028 : 9 : error_at (location, "constrained non-template friend declaration"
11029 : : " must be a definition");
11030 : : ci = NULL_TREE;
11031 : : }
11032 : 41879193 : set_constraints (decl, ci);
11033 : 381375 : if (ci && friendp && memtmpl && !funcdef_flag
11034 : 41887434 : && uses_outer_template_parms_in_constraints (decl, ctx))
11035 : 6 : error_at (location, "friend function template with constraints that "
11036 : : "depend on outer template parameters must be a definition");
11037 : : }
11038 : :
11039 : 163058261 : if (TREE_CODE (type) == METHOD_TYPE)
11040 : : {
11041 : 85425168 : tree parm = build_this_parm (decl, type, quals);
11042 : 85425168 : DECL_CHAIN (parm) = parms;
11043 : 85425168 : parms = parm;
11044 : :
11045 : : /* Allocate space to hold the vptr bit if needed. */
11046 : 85425168 : SET_DECL_ALIGN (decl, MINIMUM_METHOD_BOUNDARY);
11047 : : }
11048 : :
11049 : 163058261 : DECL_ARGUMENTS (decl) = parms;
11050 : 496036482 : for (t = parms; t; t = DECL_CHAIN (t))
11051 : 332978221 : DECL_CONTEXT (t) = decl;
11052 : :
11053 : : /* Propagate volatile out from type to decl. */
11054 : 163058261 : if (TYPE_VOLATILE (type))
11055 : 0 : TREE_THIS_VOLATILE (decl) = 1;
11056 : :
11057 : : /* Setup decl according to sfk. */
11058 : 163058261 : switch (sfk)
11059 : : {
11060 : 20914897 : case sfk_constructor:
11061 : 20914897 : case sfk_copy_constructor:
11062 : 20914897 : case sfk_move_constructor:
11063 : 20914897 : DECL_CXX_CONSTRUCTOR_P (decl) = 1;
11064 : 20914897 : DECL_NAME (decl) = ctor_identifier;
11065 : 20914897 : break;
11066 : 2981240 : case sfk_destructor:
11067 : 2981240 : DECL_CXX_DESTRUCTOR_P (decl) = 1;
11068 : 2981240 : DECL_NAME (decl) = dtor_identifier;
11069 : 2981240 : break;
11070 : 896792 : case sfk_deduction_guide:
11071 : : /* Give deduction guides a definition even though they don't really
11072 : : have one: the restriction that you can't repeat a deduction guide
11073 : : makes them more like a definition anyway. */
11074 : 896792 : DECL_INITIAL (decl) = void_node;
11075 : : /* But to ensure that external-linkage deduction guides in header units
11076 : : don't fall afoul of [module.import] p6, mark them as inline. */
11077 : 896792 : DECL_DECLARED_INLINE_P (decl) = true;
11078 : 896792 : break;
11079 : : default:
11080 : : break;
11081 : : }
11082 : :
11083 : 163058261 : if (friendp && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
11084 : : {
11085 : 11174 : if (funcdef_flag)
11086 : 3 : error_at (location,
11087 : : "defining explicit specialization %qD in friend declaration",
11088 : : orig_declarator);
11089 : : else
11090 : : {
11091 : 11171 : tree fns = TREE_OPERAND (orig_declarator, 0);
11092 : 11171 : tree args = TREE_OPERAND (orig_declarator, 1);
11093 : :
11094 : 11171 : if (PROCESSING_REAL_TEMPLATE_DECL_P ())
11095 : : {
11096 : : /* Something like `template <class T> friend void f<T>()'. */
11097 : 6 : error_at (location,
11098 : : "invalid use of template-id %qD in declaration "
11099 : : "of primary template",
11100 : : orig_declarator);
11101 : 6 : return NULL_TREE;
11102 : : }
11103 : :
11104 : : /* A friend declaration of the form friend void f<>(). Record
11105 : : the information in the TEMPLATE_ID_EXPR. */
11106 : 11165 : SET_DECL_IMPLICIT_INSTANTIATION (decl);
11107 : :
11108 : 11165 : gcc_assert (identifier_p (fns) || OVL_P (fns));
11109 : 11165 : DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
11110 : :
11111 : 55372 : for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
11112 : 44211 : if (TREE_PURPOSE (t)
11113 : 44211 : && TREE_CODE (TREE_PURPOSE (t)) == DEFERRED_PARSE)
11114 : : {
11115 : 4 : error_at (defparse_location (TREE_PURPOSE (t)),
11116 : : "default arguments are not allowed in declaration "
11117 : : "of friend template specialization %qD",
11118 : : decl);
11119 : 4 : return NULL_TREE;
11120 : : }
11121 : :
11122 : 11161 : if (inlinep & 1)
11123 : : {
11124 : 4 : error_at (declspecs->locations[ds_inline],
11125 : : "%<inline%> is not allowed in declaration of friend "
11126 : : "template specialization %qD",
11127 : : decl);
11128 : 4 : return NULL_TREE;
11129 : : }
11130 : : }
11131 : : }
11132 : :
11133 : : /* C++17 11.3.6/4: "If a friend declaration specifies a default argument
11134 : : expression, that declaration shall be a definition..." */
11135 : 163058247 : if (friendp && !funcdef_flag)
11136 : : {
11137 : 1134947 : for (tree t = FUNCTION_FIRST_USER_PARMTYPE (decl);
11138 : 3373599 : t && t != void_list_node; t = TREE_CHAIN (t))
11139 : 2238676 : if (TREE_PURPOSE (t))
11140 : : {
11141 : 24 : permerror (DECL_SOURCE_LOCATION (decl),
11142 : : "friend declaration of %qD specifies default "
11143 : : "arguments and isn%'t a definition", decl);
11144 : 24 : break;
11145 : : }
11146 : : }
11147 : :
11148 : : /* If this decl has namespace scope, set that up. */
11149 : 163058247 : if (in_namespace)
11150 : 90810 : set_decl_namespace (decl, in_namespace, friendp);
11151 : 162967437 : else if (ctype)
11152 : 93457559 : DECL_CONTEXT (decl) = ctype;
11153 : : else
11154 : 69509878 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
11155 : :
11156 : : /* `main' and builtins have implicit 'C' linkage. */
11157 : 163058247 : if (ctype == NULL_TREE
11158 : 69600688 : && DECL_FILE_SCOPE_P (decl)
11159 : 30122552 : && current_lang_name == lang_name_cplusplus
11160 : 165821020 : && (MAIN_NAME_P (declarator)
11161 : 2731030 : || (IDENTIFIER_LENGTH (declarator) > 10
11162 : 1923046 : && IDENTIFIER_POINTER (declarator)[0] == '_'
11163 : 1485964 : && IDENTIFIER_POINTER (declarator)[1] == '_'
11164 : 336870 : && startswith (IDENTIFIER_POINTER (declarator) + 2,
11165 : : "builtin_"))
11166 : 2731012 : || (targetcm.cxx_implicit_extern_c
11167 : 0 : && (targetcm.cxx_implicit_extern_c
11168 : 0 : (IDENTIFIER_POINTER (declarator))))))
11169 : 31761 : SET_DECL_LANGUAGE (decl, lang_c);
11170 : :
11171 : 163058247 : DECL_STATIC_FUNCTION_P (decl)
11172 : 163058247 : = !xobj_func_p && ctype && TREE_CODE (type) == FUNCTION_TYPE;
11173 : 163058247 : DECL_FUNCTION_XOBJ_FLAG (decl) = xobj_func_p;
11174 : :
11175 : 163058247 : if (deletedp)
11176 : 3319226 : DECL_DELETED_FN (decl) = 1;
11177 : :
11178 : 163058247 : if (ctype && funcdef_flag)
11179 : 78657112 : check_class_member_definition_namespace (decl);
11180 : :
11181 : 163058247 : if (ctype == NULL_TREE && DECL_MAIN_P (decl))
11182 : : {
11183 : 31746 : if (PROCESSING_REAL_TEMPLATE_DECL_P())
11184 : 9 : error_at (location, "cannot declare %<::main%> to be a template");
11185 : 31746 : if (inlinep & 1)
11186 : 3 : error_at (declspecs->locations[ds_inline],
11187 : : "cannot declare %<::main%> to be inline");
11188 : 31746 : if (inlinep & 2)
11189 : 6 : error_at (declspecs->locations[ds_constexpr],
11190 : : "cannot declare %<::main%> to be %qs", "constexpr");
11191 : 31746 : if (inlinep & 8)
11192 : 3 : error_at (declspecs->locations[ds_consteval],
11193 : : "cannot declare %<::main%> to be %qs", "consteval");
11194 : 31746 : if (!publicp)
11195 : 0 : error_at (location, "cannot declare %<::main%> to be static");
11196 : 31746 : if (current_lang_depth () != 0)
11197 : 12 : pedwarn (location, OPT_Wpedantic, "cannot declare %<::main%> with a"
11198 : : " linkage specification");
11199 : 31746 : if (module_attach_p ())
11200 : 3 : error_at (location, "cannot attach %<::main%> to a named module");
11201 : : inlinep = 0;
11202 : : publicp = 1;
11203 : : }
11204 : :
11205 : : /* Members of anonymous types and local classes have no linkage; make
11206 : : them internal. If a typedef is made later, this will be changed. */
11207 : 163058247 : if (ctype && !TREE_PUBLIC (TYPE_MAIN_DECL (ctype)))
11208 : : publicp = 0;
11209 : 163028854 : else if (ctype && decl_function_context (TYPE_MAIN_DECL (ctype)))
11210 : : /* But members of local classes in a module CMI should have their
11211 : : definitions exported, in case they are (directly or indirectly)
11212 : : used by an importer. We don't just use module_has_cmi_p here
11213 : : because for entities in the GMF we don't yet know whether this
11214 : : module will have a CMI, so we'll conservatively assume it might. */
11215 : 930113 : publicp = module_maybe_has_cmi_p ();
11216 : :
11217 : 163028854 : if (publicp && cxx_dialect == cxx98)
11218 : : {
11219 : : /* [basic.link]: A name with no linkage (notably, the name of a class
11220 : : or enumeration declared in a local scope) shall not be used to
11221 : : declare an entity with linkage.
11222 : :
11223 : : DR 757 relaxes this restriction for C++0x. */
11224 : 934045 : no_linkage_error (decl);
11225 : : }
11226 : :
11227 : 163058247 : TREE_PUBLIC (decl) = publicp;
11228 : 163058247 : if (! publicp)
11229 : : {
11230 : 1057453 : DECL_INTERFACE_KNOWN (decl) = 1;
11231 : 1057453 : DECL_NOT_REALLY_EXTERN (decl) = 1;
11232 : : }
11233 : :
11234 : : /* If the declaration was declared inline, mark it as such. */
11235 : 163058247 : if (inlinep)
11236 : : {
11237 : 47361604 : DECL_DECLARED_INLINE_P (decl) = 1;
11238 : 47361604 : if (publicp)
11239 : 47227027 : DECL_COMDAT (decl) = 1;
11240 : : }
11241 : 47361604 : if (inlinep & 2)
11242 : 27287797 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
11243 : 135770450 : else if (inlinep & 8)
11244 : : {
11245 : 82227 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
11246 : 82227 : SET_DECL_IMMEDIATE_FUNCTION_P (decl);
11247 : : }
11248 : :
11249 : 163058247 : DECL_EXTERNAL (decl) = 1;
11250 : 163058247 : if (TREE_CODE (type) == FUNCTION_TYPE)
11251 : : {
11252 : 77633079 : if (quals || rqual)
11253 : 272 : TREE_TYPE (decl) = apply_memfn_quals (TREE_TYPE (decl),
11254 : : TYPE_UNQUALIFIED,
11255 : : REF_QUAL_NONE);
11256 : 77633079 : auto_diagnostic_group d;
11257 : 77633079 : if (quals)
11258 : 423 : error (!ctype
11259 : : ? G_("non-member function %qD cannot have cv-qualifier")
11260 : : : !xobj_func_p
11261 : 198 : ? G_("static member function %qD cannot have cv-qualifier")
11262 : : : G_("explicit object member function "
11263 : : "%qD cannot have cv-qualifier"),
11264 : : decl);
11265 : 77633079 : if (rqual)
11266 : 355 : error (!ctype
11267 : : ? G_("non-member function %qD cannot have ref-qualifier")
11268 : : : !xobj_func_p
11269 : 176 : ? G_("static member function %qD cannot have ref-qualifier")
11270 : : : G_("explicit object member function "
11271 : : "%qD cannot have ref-qualifier"),
11272 : : decl);
11273 : :
11274 : 77633079 : if (xobj_func_p && (quals || rqual))
11275 : 242 : inform (DECL_SOURCE_LOCATION (DECL_ARGUMENTS (decl)),
11276 : : "explicit object parameter declared here");
11277 : 77633079 : quals = TYPE_UNQUALIFIED;
11278 : 77633079 : rqual = REF_QUAL_NONE;
11279 : :
11280 : 77633079 : }
11281 : :
11282 : 163058247 : if (deduction_guide_p (decl))
11283 : : {
11284 : 896792 : tree type = TREE_TYPE (DECL_NAME (decl));
11285 : 896792 : if (in_namespace == NULL_TREE
11286 : 896792 : && CP_DECL_CONTEXT (decl) != CP_TYPE_CONTEXT (type))
11287 : : {
11288 : 3 : auto_diagnostic_group d;
11289 : 3 : error_at (location, "deduction guide %qD must be declared in the "
11290 : : "same scope as %qT", decl, type);
11291 : 3 : inform (location_of (type), " declared here");
11292 : 3 : return NULL_TREE;
11293 : 3 : }
11294 : 1793578 : if (DECL_CLASS_SCOPE_P (decl)
11295 : 896828 : && current_access_specifier != declared_access (TYPE_NAME (type)))
11296 : : {
11297 : 3 : auto_diagnostic_group d;
11298 : 3 : error_at (location, "deduction guide %qD must have the same access "
11299 : : "as %qT", decl, type);
11300 : 3 : inform (location_of (type), " declared here");
11301 : 3 : }
11302 : 896789 : if (funcdef_flag)
11303 : 3 : error_at (location,
11304 : : "deduction guide %qD must not have a function body", decl);
11305 : : }
11306 : 304604767 : else if (IDENTIFIER_ANY_OP_P (DECL_NAME (decl))
11307 : 172142618 : && !grok_op_properties (decl, /*complain=*/true))
11308 : : return NULL_TREE;
11309 : 162161308 : else if (UDLIT_OPER_P (DECL_NAME (decl)))
11310 : : {
11311 : 270161 : bool long_long_unsigned_p;
11312 : 270161 : bool long_double_p;
11313 : 270161 : const char *suffix = NULL;
11314 : : /* [over.literal]/6: Literal operators shall not have C linkage. */
11315 : 270161 : if (DECL_LANGUAGE (decl) == lang_c)
11316 : : {
11317 : 6 : auto_diagnostic_group d;
11318 : 6 : error_at (location, "literal operator with C linkage");
11319 : 6 : maybe_show_extern_c_location ();
11320 : 6 : return NULL_TREE;
11321 : 6 : }
11322 : :
11323 : 270155 : if (DECL_NAMESPACE_SCOPE_P (decl))
11324 : : {
11325 : 270149 : if (!check_literal_operator_args (decl, &long_long_unsigned_p,
11326 : : &long_double_p))
11327 : : {
11328 : 42 : error_at (location, "%qD has invalid argument list", decl);
11329 : 42 : return NULL_TREE;
11330 : : }
11331 : :
11332 : 270107 : suffix = UDLIT_OP_SUFFIX (DECL_NAME (decl));
11333 : 270107 : if (long_long_unsigned_p)
11334 : : {
11335 : 32394 : if (cpp_interpret_int_suffix (parse_in, suffix, strlen (suffix)))
11336 : 68 : warning_at (location, 0, "integer suffix %qs"
11337 : : " shadowed by implementation", suffix);
11338 : : }
11339 : 237713 : else if (long_double_p)
11340 : : {
11341 : 85953 : if (cpp_interpret_float_suffix (parse_in, suffix, strlen (suffix)))
11342 : 80 : warning_at (location, 0, "floating-point suffix %qs"
11343 : : " shadowed by implementation", suffix);
11344 : : }
11345 : : /* 17.6.3.3.5 */
11346 : 270107 : if (suffix[0] != '_'
11347 : 269567 : && !current_function_decl && !(friendp && !funcdef_flag))
11348 : 269561 : warning_at (location, OPT_Wliteral_suffix,
11349 : : "literal operator suffixes not preceded by %<_%>"
11350 : : " are reserved for future standardization");
11351 : : }
11352 : : else
11353 : : {
11354 : 6 : error_at (location, "%qD must be a non-member function", decl);
11355 : 6 : return NULL_TREE;
11356 : : }
11357 : : }
11358 : :
11359 : 162161257 : if (funcdef_flag)
11360 : : /* Make the init_value nonzero so pushdecl knows this is not
11361 : : tentative. error_mark_node is replaced later with the BLOCK. */
11362 : 110632645 : DECL_INITIAL (decl) = error_mark_node;
11363 : :
11364 : 163058043 : if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
11365 : 61154582 : TREE_NOTHROW (decl) = 1;
11366 : :
11367 : 163058043 : if (flag_openmp || flag_openmp_simd)
11368 : : {
11369 : : /* Adjust "omp declare simd" attributes. */
11370 : 212900 : tree ods = lookup_attribute ("omp declare simd", *attrlist);
11371 : 212900 : if (ods)
11372 : : {
11373 : : tree attr;
11374 : 2002 : for (attr = ods; attr;
11375 : 1058 : attr = lookup_attribute ("omp declare simd", TREE_CHAIN (attr)))
11376 : : {
11377 : 1058 : if (TREE_CODE (type) == METHOD_TYPE)
11378 : 204 : walk_tree (&TREE_VALUE (attr), declare_simd_adjust_this,
11379 : : DECL_ARGUMENTS (decl), NULL);
11380 : 1058 : if (TREE_VALUE (attr) != NULL_TREE)
11381 : : {
11382 : 854 : tree cl = TREE_VALUE (TREE_VALUE (attr));
11383 : 854 : cl = c_omp_declare_simd_clauses_to_numbers
11384 : 854 : (DECL_ARGUMENTS (decl), cl);
11385 : 854 : if (cl)
11386 : 854 : TREE_VALUE (TREE_VALUE (attr)) = cl;
11387 : : else
11388 : 0 : TREE_VALUE (attr) = NULL_TREE;
11389 : : }
11390 : : }
11391 : : }
11392 : : }
11393 : :
11394 : : /* Caller will do the rest of this. */
11395 : 163058043 : if (check < 0)
11396 : 3602606 : return decl;
11397 : :
11398 : 159455437 : if (ctype != NULL_TREE)
11399 : 93457266 : grokclassfn (ctype, decl, flags);
11400 : :
11401 : : /* 12.4/3 */
11402 : 159455437 : if (cxx_dialect >= cxx11
11403 : 317048862 : && DECL_DESTRUCTOR_P (decl)
11404 : 2963730 : && !TYPE_BEING_DEFINED (DECL_CONTEXT (decl))
11405 : 159620636 : && !processing_template_decl)
11406 : 83554 : deduce_noexcept_on_destructor (decl);
11407 : :
11408 : 159455437 : set_originating_module (decl);
11409 : :
11410 : 159455437 : decl = check_explicit_specialization (orig_declarator, decl,
11411 : : template_count,
11412 : 159455437 : 2 * funcdef_flag +
11413 : 159455437 : 4 * (friendp != 0),
11414 : : *attrlist);
11415 : 159455437 : if (decl == error_mark_node)
11416 : : return NULL_TREE;
11417 : :
11418 : 159455189 : if (DECL_STATIC_FUNCTION_P (decl))
11419 : 8016089 : check_static_quals (decl, quals);
11420 : :
11421 : 159455189 : if (attrlist)
11422 : : {
11423 : 159455189 : cplus_decl_attributes (&decl, *attrlist, 0);
11424 : 159455189 : *attrlist = NULL_TREE;
11425 : : }
11426 : :
11427 : 159455189 : if (DECL_HAS_CONTRACTS_P (decl))
11428 : 460 : rebuild_postconditions (decl);
11429 : :
11430 : : /* Check main's type after attributes have been applied. */
11431 : 159455189 : if (ctype == NULL_TREE && DECL_MAIN_P (decl))
11432 : : {
11433 : 31734 : if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
11434 : : integer_type_node))
11435 : : {
11436 : 20 : tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
11437 : 20 : tree newtype;
11438 : 20 : error_at (declspecs->locations[ds_type_spec],
11439 : : "%<::main%> must return %<int%>");
11440 : 20 : newtype = build_function_type (integer_type_node, oldtypeargs);
11441 : 20 : TREE_TYPE (decl) = newtype;
11442 : : }
11443 : 31734 : if (warn_main)
11444 : 31714 : check_main_parameter_types (decl);
11445 : : }
11446 : :
11447 : 159455189 : if (ctype != NULL_TREE && check)
11448 : : {
11449 : 8759663 : tree old_decl = check_classfn (ctype, decl,
11450 : 8759663 : (current_template_depth
11451 : 8759663 : > template_class_depth (ctype))
11452 : 2031407 : ? current_template_parms
11453 : : : NULL_TREE);
11454 : :
11455 : 8759663 : if (old_decl == error_mark_node)
11456 : : return NULL_TREE;
11457 : :
11458 : 8759582 : if (old_decl)
11459 : : {
11460 : 8364596 : tree ok;
11461 : 8364596 : tree pushed_scope;
11462 : :
11463 : 8364596 : if (TREE_CODE (old_decl) == TEMPLATE_DECL)
11464 : : /* Because grokfndecl is always supposed to return a
11465 : : FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
11466 : : here. We depend on our callers to figure out that its
11467 : : really a template that's being returned. */
11468 : 2031395 : old_decl = DECL_TEMPLATE_RESULT (old_decl);
11469 : :
11470 : 8364596 : if (DECL_STATIC_FUNCTION_P (old_decl)
11471 : 8364596 : && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
11472 : : {
11473 : : /* Remove the `this' parm added by grokclassfn. */
11474 : 153860 : revert_static_member_fn (decl);
11475 : 153860 : check_static_quals (decl, quals);
11476 : : }
11477 : 8364596 : if (DECL_ARTIFICIAL (old_decl))
11478 : : {
11479 : 9 : error ("definition of implicitly-declared %qD", old_decl);
11480 : 9 : return NULL_TREE;
11481 : : }
11482 : 8364587 : else if (DECL_DEFAULTED_FN (old_decl))
11483 : : {
11484 : 3 : auto_diagnostic_group d;
11485 : 3 : error ("definition of explicitly-defaulted %q+D", decl);
11486 : 3 : inform (DECL_SOURCE_LOCATION (old_decl),
11487 : : "%q#D explicitly defaulted here", old_decl);
11488 : 3 : return NULL_TREE;
11489 : 3 : }
11490 : :
11491 : : /* Since we've smashed OLD_DECL to its
11492 : : DECL_TEMPLATE_RESULT, we must do the same to DECL. */
11493 : 8364584 : if (TREE_CODE (decl) == TEMPLATE_DECL)
11494 : 965 : decl = DECL_TEMPLATE_RESULT (decl);
11495 : :
11496 : : /* Attempt to merge the declarations. This can fail, in
11497 : : the case of some invalid specialization declarations. */
11498 : 8364584 : pushed_scope = push_scope (ctype);
11499 : 8364584 : ok = duplicate_decls (decl, old_decl);
11500 : 8364584 : if (pushed_scope)
11501 : 8364584 : pop_scope (pushed_scope);
11502 : 8364584 : if (!ok)
11503 : : {
11504 : 0 : error ("no %q#D member function declared in class %qT",
11505 : : decl, ctype);
11506 : 0 : return NULL_TREE;
11507 : : }
11508 : 8364584 : if (ok == error_mark_node)
11509 : : return NULL_TREE;
11510 : : return old_decl;
11511 : : }
11512 : : }
11513 : :
11514 : 302181024 : if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
11515 : : return NULL_TREE;
11516 : :
11517 : 151090509 : if (ctype == NULL_TREE || check)
11518 : 66392966 : return decl;
11519 : :
11520 : 84697543 : if (virtualp)
11521 : 3895634 : DECL_VIRTUAL_P (decl) = 1;
11522 : :
11523 : 84697543 : return decl;
11524 : : }
11525 : :
11526 : : /* decl is a FUNCTION_DECL.
11527 : : specifiers are the parsed virt-specifiers.
11528 : :
11529 : : Set flags to reflect the virt-specifiers.
11530 : :
11531 : : Returns decl. */
11532 : :
11533 : : static tree
11534 : 88300244 : set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
11535 : : {
11536 : 88300244 : if (decl == NULL_TREE)
11537 : : return decl;
11538 : 88300149 : if (specifiers & VIRT_SPEC_OVERRIDE)
11539 : 150562 : DECL_OVERRIDE_P (decl) = 1;
11540 : 88300149 : if (specifiers & VIRT_SPEC_FINAL)
11541 : 2617 : DECL_FINAL_P (decl) = 1;
11542 : : return decl;
11543 : : }
11544 : :
11545 : : /* DECL is a VAR_DECL for a static data member. Set flags to reflect
11546 : : the linkage that DECL will receive in the object file. */
11547 : :
11548 : : static void
11549 : 9981073 : set_linkage_for_static_data_member (tree decl)
11550 : : {
11551 : : /* A static data member always has static storage duration and
11552 : : external linkage. Note that static data members are forbidden in
11553 : : local classes -- the only situation in which a class has
11554 : : non-external linkage. */
11555 : 9981073 : TREE_PUBLIC (decl) = 1;
11556 : 9981073 : TREE_STATIC (decl) = 1;
11557 : : /* For non-template classes, static data members are always put
11558 : : out in exactly those files where they are defined, just as
11559 : : with ordinary namespace-scope variables. */
11560 : 9981073 : if (!processing_template_decl)
11561 : 7409830 : DECL_INTERFACE_KNOWN (decl) = 1;
11562 : 9981073 : }
11563 : :
11564 : : /* Create a VAR_DECL named NAME with the indicated TYPE.
11565 : :
11566 : : If SCOPE is non-NULL, it is the class type or namespace containing
11567 : : the variable. If SCOPE is NULL, the variable should is created in
11568 : : the innermost enclosing scope. */
11569 : :
11570 : : static tree
11571 : 53252242 : grokvardecl (tree type,
11572 : : tree name,
11573 : : tree orig_declarator,
11574 : : const cp_decl_specifier_seq *declspecs,
11575 : : int initialized,
11576 : : int type_quals,
11577 : : int inlinep,
11578 : : bool conceptp,
11579 : : int template_count,
11580 : : tree scope,
11581 : : location_t location)
11582 : : {
11583 : 53252242 : tree decl;
11584 : 53252242 : tree explicit_scope;
11585 : :
11586 : 53252242 : gcc_assert (!name || identifier_p (name));
11587 : :
11588 : 53252242 : bool constp = (type_quals & TYPE_QUAL_CONST) != 0;
11589 : 53252242 : bool volatilep = (type_quals & TYPE_QUAL_VOLATILE) != 0;
11590 : :
11591 : : /* Compute the scope in which to place the variable, but remember
11592 : : whether or not that scope was explicitly specified by the user. */
11593 : 53252242 : explicit_scope = scope;
11594 : 53252242 : if (!scope)
11595 : : {
11596 : : /* An explicit "extern" specifier indicates a namespace-scope
11597 : : variable. */
11598 : 52881289 : if (declspecs->storage_class == sc_extern)
11599 : 547758 : scope = current_decl_namespace ();
11600 : 52333531 : else if (!at_function_scope_p ())
11601 : 3974844 : scope = current_scope ();
11602 : : }
11603 : :
11604 : 52881289 : if (scope
11605 : 4893555 : && (/* If the variable is a namespace-scope variable declared in a
11606 : : template, we need DECL_LANG_SPECIFIC. */
11607 : 4893555 : (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
11608 : : /* Similarly for namespace-scope variables with language linkage
11609 : : other than C++. */
11610 : 4525331 : || (TREE_CODE (scope) == NAMESPACE_DECL
11611 : 2304507 : && current_lang_name != lang_name_cplusplus)
11612 : : /* Similarly for static data members. */
11613 : 2445279 : || TYPE_P (scope)
11614 : : /* Similarly for explicit specializations. */
11615 : 2077055 : || (orig_declarator
11616 : 2076783 : && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)))
11617 : 3131298 : decl = build_lang_decl_loc (location, VAR_DECL, name, type);
11618 : : else
11619 : 50120944 : decl = build_decl (location, VAR_DECL, name, type);
11620 : :
11621 : 53252242 : if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
11622 : 2729 : set_decl_namespace (decl, explicit_scope, 0);
11623 : : else
11624 : 53249513 : DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
11625 : :
11626 : 53252242 : if (declspecs->storage_class == sc_extern)
11627 : : {
11628 : 547758 : DECL_THIS_EXTERN (decl) = 1;
11629 : 547758 : DECL_EXTERNAL (decl) = !initialized;
11630 : : }
11631 : :
11632 : 53252242 : if (DECL_CLASS_SCOPE_P (decl))
11633 : : {
11634 : 368224 : set_linkage_for_static_data_member (decl);
11635 : : /* This function is only called with out-of-class definitions. */
11636 : 368224 : DECL_EXTERNAL (decl) = 0;
11637 : 368224 : check_class_member_definition_namespace (decl);
11638 : : }
11639 : : /* At top level, either `static' or no s.c. makes a definition
11640 : : (perhaps tentative), and absence of `static' makes it public. */
11641 : 52884018 : else if (toplevel_bindings_p ())
11642 : : {
11643 : 9048416 : TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
11644 : 4524208 : && (DECL_THIS_EXTERN (decl)
11645 : 3938854 : || ! constp
11646 : 3938854 : || volatilep
11647 : 3867569 : || inlinep
11648 : 245505 : || in_template_context
11649 : 27065 : || processing_specialization
11650 : 26985 : || module_attach_p ()));
11651 : 4524208 : TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
11652 : : }
11653 : : /* Not at top level, only `static' makes a static definition. */
11654 : : else
11655 : : {
11656 : 48359810 : TREE_STATIC (decl) = declspecs->storage_class == sc_static;
11657 : 48359810 : TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
11658 : : }
11659 : :
11660 : 53252242 : set_originating_module (decl);
11661 : :
11662 : 53252242 : if (decl_spec_seq_has_spec_p (declspecs, ds_thread))
11663 : : {
11664 : 19742 : if (DECL_EXTERNAL (decl) || TREE_STATIC (decl))
11665 : : {
11666 : 19734 : CP_DECL_THREAD_LOCAL_P (decl) = true;
11667 : 19734 : if (!processing_template_decl)
11668 : 19703 : set_decl_tls_model (decl, decl_default_tls_model (decl));
11669 : : }
11670 : 19742 : if (declspecs->gnu_thread_keyword_p)
11671 : 18979 : SET_DECL_GNU_TLS_P (decl);
11672 : : }
11673 : :
11674 : : /* If the type of the decl has no linkage, make sure that we'll
11675 : : notice that in mark_used. */
11676 : 53252242 : if (cxx_dialect > cxx98
11677 : 53008010 : && decl_linkage (decl) != lk_none
11678 : 52489114 : && DECL_LANG_SPECIFIC (decl) == NULL
11679 : 49228225 : && !DECL_EXTERN_C_P (decl)
11680 : 102480467 : && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
11681 : 3298 : retrofit_lang_decl (decl);
11682 : :
11683 : 53252242 : if (TREE_PUBLIC (decl))
11684 : : {
11685 : : /* [basic.link]: A name with no linkage (notably, the name of a class
11686 : : or enumeration declared in a local scope) shall not be used to
11687 : : declare an entity with linkage.
11688 : :
11689 : : DR 757 relaxes this restriction for C++0x. */
11690 : 4827872 : if (cxx_dialect < cxx11)
11691 : 20299 : no_linkage_error (decl);
11692 : : }
11693 : : else
11694 : 48424370 : DECL_INTERFACE_KNOWN (decl) = 1;
11695 : :
11696 : 53252242 : if (DECL_NAME (decl)
11697 : 53252242 : && MAIN_NAME_P (DECL_NAME (decl)))
11698 : : {
11699 : 12 : if (scope == global_namespace)
11700 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
11701 : : "cannot declare %<::main%> to be a global variable");
11702 : 6 : else if (DECL_EXTERN_C_P (decl))
11703 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
11704 : : "an entity named %<main%> cannot be declared with "
11705 : : "C language linkage");
11706 : : }
11707 : :
11708 : : /* Check if a variable is being declared as a concept. */
11709 : 53252242 : if (conceptp)
11710 : : {
11711 : 27 : if (!processing_template_decl)
11712 : 11 : error_at (declspecs->locations[ds_concept],
11713 : : "a non-template variable cannot be %<concept%>");
11714 : 16 : else if (!at_namespace_scope_p ())
11715 : 1 : error_at (declspecs->locations[ds_concept],
11716 : : "concept must be defined at namespace scope");
11717 : : else
11718 : 15 : error_at (declspecs->locations[ds_concept],
11719 : : "variable concepts are no longer supported");
11720 : 27 : return NULL_TREE;
11721 : : }
11722 : 53252215 : else if (flag_concepts
11723 : 53252215 : && current_template_depth > template_class_depth (scope))
11724 : : {
11725 : 13109921 : tree ci = current_template_constraints ();
11726 : 13109921 : set_constraints (decl, ci);
11727 : : }
11728 : :
11729 : : // Handle explicit specializations and instantiations of variable templates.
11730 : 53252215 : if (orig_declarator)
11731 : 52726009 : decl = check_explicit_specialization (orig_declarator, decl,
11732 : : template_count, 0);
11733 : :
11734 : 53252215 : return decl != error_mark_node ? decl : NULL_TREE;
11735 : : }
11736 : :
11737 : : /* Create and return a canonical pointer to member function type, for
11738 : : TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
11739 : :
11740 : : tree
11741 : 3441091 : build_ptrmemfunc_type (tree type)
11742 : : {
11743 : 3441091 : tree field, fields;
11744 : 3441091 : tree t;
11745 : :
11746 : 3441091 : if (type == error_mark_node)
11747 : : return type;
11748 : :
11749 : : /* Make sure that we always have the unqualified pointer-to-member
11750 : : type first. */
11751 : 3441091 : if (cp_cv_quals quals = cp_type_quals (type))
11752 : : {
11753 : 0 : tree unqual = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
11754 : 0 : return cp_build_qualified_type (unqual, quals);
11755 : : }
11756 : :
11757 : : /* If a canonical type already exists for this type, use it. We use
11758 : : this method instead of type_hash_canon, because it only does a
11759 : : simple equality check on the list of field members. */
11760 : :
11761 : 3441091 : t = TYPE_PTRMEMFUNC_TYPE (type);
11762 : 3441091 : if (t)
11763 : : return t;
11764 : :
11765 : 1094441 : t = make_node (RECORD_TYPE);
11766 : :
11767 : : /* Let the front end know this is a pointer to member function. */
11768 : 1094441 : TYPE_PTRMEMFUNC_FLAG (t) = 1;
11769 : :
11770 : 1094441 : field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
11771 : 1094441 : DECL_NONADDRESSABLE_P (field) = 1;
11772 : 1094441 : fields = field;
11773 : :
11774 : 1094441 : field = build_decl (input_location, FIELD_DECL, delta_identifier,
11775 : : delta_type_node);
11776 : 1094441 : DECL_NONADDRESSABLE_P (field) = 1;
11777 : 1094441 : DECL_CHAIN (field) = fields;
11778 : 1094441 : fields = field;
11779 : :
11780 : 1094441 : finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
11781 : :
11782 : : /* Zap out the name so that the back end will give us the debugging
11783 : : information for this anonymous RECORD_TYPE. */
11784 : 1094441 : TYPE_NAME (t) = NULL_TREE;
11785 : :
11786 : : /* Cache this pointer-to-member type so that we can find it again
11787 : : later. */
11788 : 1094441 : TYPE_PTRMEMFUNC_TYPE (type) = t;
11789 : :
11790 : 1094441 : if (TYPE_STRUCTURAL_EQUALITY_P (type))
11791 : 593252 : SET_TYPE_STRUCTURAL_EQUALITY (t);
11792 : 501189 : else if (TYPE_CANONICAL (type) != type)
11793 : 324203 : TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
11794 : :
11795 : : return t;
11796 : : }
11797 : :
11798 : : /* Create and return a pointer to data member type. */
11799 : :
11800 : : tree
11801 : 304058 : build_ptrmem_type (tree class_type, tree member_type)
11802 : : {
11803 : 304058 : if (TREE_CODE (member_type) == METHOD_TYPE)
11804 : : {
11805 : 60238 : cp_cv_quals quals = type_memfn_quals (member_type);
11806 : 60238 : cp_ref_qualifier rqual = type_memfn_rqual (member_type);
11807 : 60238 : member_type = build_memfn_type (member_type, class_type, quals, rqual);
11808 : 60238 : return build_ptrmemfunc_type (build_pointer_type (member_type));
11809 : : }
11810 : : else
11811 : : {
11812 : 243820 : gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
11813 : 243820 : return build_offset_type (class_type, member_type);
11814 : : }
11815 : : }
11816 : :
11817 : : /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
11818 : : Check to see that the definition is valid. Issue appropriate error
11819 : : messages. */
11820 : :
11821 : : static void
11822 : 12713699 : check_static_variable_definition (tree decl, tree type)
11823 : : {
11824 : : /* Avoid redundant diagnostics on out-of-class definitions. */
11825 : 12713699 : if (!current_class_type || !TYPE_BEING_DEFINED (current_class_type))
11826 : : ;
11827 : : /* Can't check yet if we don't know the type. */
11828 : 11833837 : else if (dependent_type_p (type))
11829 : : ;
11830 : : /* If DECL is declared constexpr, we'll do the appropriate checks
11831 : : in check_initializer. Similarly for inline static data members. */
11832 : 11634112 : else if (DECL_P (decl)
11833 : 11634112 : && (DECL_DECLARED_CONSTEXPR_P (decl)
11834 : 2299058 : || DECL_VAR_DECLARED_INLINE_P (decl)))
11835 : : ;
11836 : 2298660 : else if (cxx_dialect >= cxx11 && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
11837 : : {
11838 : 50 : if (!COMPLETE_TYPE_P (type))
11839 : 11 : error_at (DECL_SOURCE_LOCATION (decl),
11840 : : "in-class initialization of static data member %q#D of "
11841 : : "incomplete type", decl);
11842 : 39 : else if (literal_type_p (type))
11843 : 33 : permerror (DECL_SOURCE_LOCATION (decl),
11844 : : "%<constexpr%> needed for in-class initialization of "
11845 : : "static data member %q#D of non-integral type", decl);
11846 : : else
11847 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
11848 : : "in-class initialization of static data member %q#D of "
11849 : : "non-literal type", decl);
11850 : : }
11851 : : /* Motion 10 at San Diego: If a static const integral data member is
11852 : : initialized with an integral constant expression, the initializer
11853 : : may appear either in the declaration (within the class), or in
11854 : : the definition, but not both. If it appears in the class, the
11855 : : member is a member constant. The file-scope definition is always
11856 : : required. */
11857 : 2298610 : else if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
11858 : 11 : error_at (DECL_SOURCE_LOCATION (decl),
11859 : : "invalid in-class initialization of static data member "
11860 : : "of non-integral type %qT",
11861 : : type);
11862 : 2298599 : else if (!CP_TYPE_CONST_P (type))
11863 : 5 : error_at (DECL_SOURCE_LOCATION (decl),
11864 : : "ISO C++ forbids in-class initialization of non-const "
11865 : : "static member %qD",
11866 : : decl);
11867 : 2298594 : else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
11868 : 5 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wpedantic,
11869 : : "ISO C++ forbids initialization of member constant "
11870 : : "%qD of non-integral type %qT", decl, type);
11871 : 12713699 : }
11872 : :
11873 : : /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
11874 : : SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
11875 : : expressions out into temporary variables so that walk_tree doesn't
11876 : : step into them (c++/15764). */
11877 : :
11878 : : static tree
11879 : 3102 : stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
11880 : : {
11881 : 3102 : hash_set<tree> *pset = (hash_set<tree> *)data;
11882 : 3102 : tree expr = *expr_p;
11883 : 3102 : if (TREE_CODE (expr) == SAVE_EXPR)
11884 : : {
11885 : 1332 : tree op = TREE_OPERAND (expr, 0);
11886 : 1332 : cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
11887 : 1332 : if (TREE_SIDE_EFFECTS (op))
11888 : 56 : TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
11889 : 1332 : *walk_subtrees = 0;
11890 : : }
11891 : 1770 : else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
11892 : 1595 : *walk_subtrees = 0;
11893 : 3102 : return NULL;
11894 : : }
11895 : :
11896 : : /* Entry point for the above. */
11897 : :
11898 : : static void
11899 : 1391 : stabilize_vla_size (tree size)
11900 : : {
11901 : 1391 : hash_set<tree> pset;
11902 : : /* Break out any function calls into temporary variables. */
11903 : 1391 : cp_walk_tree (&size, stabilize_save_expr_r, &pset, &pset);
11904 : 1391 : }
11905 : :
11906 : : /* Reduce a SIZEOF_EXPR to its value. */
11907 : :
11908 : : tree
11909 : 10618545 : fold_sizeof_expr (tree t)
11910 : : {
11911 : 10618545 : tree r;
11912 : 10618545 : if (SIZEOF_EXPR_TYPE_P (t))
11913 : 9940542 : r = cxx_sizeof_or_alignof_type (EXPR_LOCATION (t),
11914 : 9940542 : TREE_TYPE (TREE_OPERAND (t, 0)),
11915 : : SIZEOF_EXPR, false, false);
11916 : 678003 : else if (TYPE_P (TREE_OPERAND (t, 0)))
11917 : 0 : r = cxx_sizeof_or_alignof_type (EXPR_LOCATION (t),
11918 : 0 : TREE_OPERAND (t, 0), SIZEOF_EXPR,
11919 : : false, false);
11920 : : else
11921 : 678003 : r = cxx_sizeof_or_alignof_expr (EXPR_LOCATION (t),
11922 : 678003 : TREE_OPERAND (t, 0), SIZEOF_EXPR,
11923 : : false, false);
11924 : 10618545 : if (r == error_mark_node)
11925 : 51 : r = size_one_node;
11926 : 10618545 : return r;
11927 : : }
11928 : :
11929 : : /* Given the SIZE (i.e., number of elements) in an array, compute
11930 : : an appropriate index type for the array. If non-NULL, NAME is
11931 : : the name of the entity being declared. */
11932 : :
11933 : : static tree
11934 : 2537172 : compute_array_index_type_loc (location_t name_loc, tree name, tree size,
11935 : : tsubst_flags_t complain)
11936 : : {
11937 : 2537172 : if (error_operand_p (size))
11938 : 37 : return error_mark_node;
11939 : :
11940 : : /* The type of the index being computed. */
11941 : 2537135 : tree itype;
11942 : :
11943 : : /* The original numeric size as seen in the source code before
11944 : : conversion to size_t. */
11945 : 2537135 : tree origsize = size;
11946 : :
11947 : 2537135 : location_t loc = cp_expr_loc_or_loc (size, name ? name_loc : input_location);
11948 : :
11949 : 2537135 : if (!type_dependent_expression_p (size))
11950 : : {
11951 : 2503442 : origsize = size = mark_rvalue_use (size);
11952 : :
11953 : 33774 : if (cxx_dialect < cxx11 && TREE_CODE (size) == NOP_EXPR
11954 : 2503595 : && TREE_SIDE_EFFECTS (size))
11955 : : /* In C++98, we mark a non-constant array bound with a magic
11956 : : NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
11957 : : else
11958 : : {
11959 : 2503441 : size = build_converted_constant_expr (size_type_node, size, complain);
11960 : : /* Pedantically a constant expression is required here and so
11961 : : __builtin_is_constant_evaluated () should fold to true if it
11962 : : is successfully folded into a constant. */
11963 : 2503441 : size = fold_non_dependent_expr (size, complain,
11964 : : /*manifestly_const_eval=*/true);
11965 : :
11966 : 2503441 : if (!TREE_CONSTANT (size))
11967 : 100387 : size = origsize;
11968 : : }
11969 : :
11970 : 2503442 : if (error_operand_p (size))
11971 : 3 : return error_mark_node;
11972 : :
11973 : : /* The array bound must be an integer type. */
11974 : 2503439 : tree type = TREE_TYPE (size);
11975 : 2503439 : if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
11976 : : {
11977 : 21 : if (!(complain & tf_error))
11978 : 0 : return error_mark_node;
11979 : 21 : if (name)
11980 : 18 : error_at (loc, "size of array %qD has non-integral type %qT",
11981 : : name, type);
11982 : : else
11983 : 3 : error_at (loc, "size of array has non-integral type %qT", type);
11984 : 21 : size = integer_one_node;
11985 : : }
11986 : : }
11987 : :
11988 : : /* A type is dependent if it is...an array type constructed from any
11989 : : dependent type or whose size is specified by a constant expression
11990 : : that is value-dependent. */
11991 : : /* We can only call value_dependent_expression_p on integral constant
11992 : : expressions. */
11993 : 2537132 : if (processing_template_decl
11994 : 1059757 : && potential_constant_expression (size)
11995 : 3596861 : && value_dependent_expression_p (size))
11996 : : {
11997 : : /* Just build the index type and mark that it requires
11998 : : structural equality checks. */
11999 : 607384 : in_template:
12000 : 607384 : itype = build_index_type (build_min (MINUS_EXPR, sizetype,
12001 : : size, size_one_node));
12002 : 607384 : TYPE_DEPENDENT_P (itype) = 1;
12003 : 607384 : TYPE_DEPENDENT_P_VALID (itype) = 1;
12004 : 607384 : SET_TYPE_STRUCTURAL_EQUALITY (itype);
12005 : 607384 : return itype;
12006 : : }
12007 : :
12008 : 1929809 : if (TREE_CODE (size) != INTEGER_CST)
12009 : : {
12010 : 1848 : tree folded = cp_fully_fold (size);
12011 : 1848 : if (TREE_CODE (folded) == INTEGER_CST)
12012 : : {
12013 : 207 : if (name)
12014 : 133 : pedwarn (loc, OPT_Wpedantic, "size of array %qD is not an "
12015 : : "integral constant-expression", name);
12016 : : else
12017 : 74 : pedwarn (loc, OPT_Wpedantic,
12018 : : "size of array is not an integral constant-expression");
12019 : : }
12020 : 1848 : if (TREE_CONSTANT (size) && !TREE_CONSTANT (folded))
12021 : : /* We might have lost the TREE_CONSTANT flag e.g. when we are
12022 : : folding a conversion from a pointer to integral type. In that
12023 : : case issue an error below and don't treat this as a VLA. */;
12024 : : else
12025 : : /* Use the folded result for VLAs, too; it will have resolved
12026 : : SIZEOF_EXPR. */
12027 : : size = folded;
12028 : : }
12029 : :
12030 : : /* Normally, the array-bound will be a constant. */
12031 : 1929809 : if (TREE_CODE (size) == INTEGER_CST)
12032 : : {
12033 : : /* The size to use in diagnostics that reflects the constant
12034 : : size used in the source, rather than SIZE massaged above. */
12035 : 1928168 : tree diagsize = size;
12036 : :
12037 : : /* If the original size before conversion to size_t was signed
12038 : : and negative, convert it to ssizetype to restore the sign. */
12039 : 1928168 : if (!TYPE_UNSIGNED (TREE_TYPE (origsize))
12040 : : && TREE_CODE (size) == INTEGER_CST
12041 : 1928168 : && tree_int_cst_sign_bit (size))
12042 : : {
12043 : 226 : diagsize = fold_convert (ssizetype, size);
12044 : :
12045 : : /* Clear the overflow bit that may have been set as a result
12046 : : of the conversion from the sizetype of the new size to
12047 : : ssizetype. */
12048 : 226 : TREE_OVERFLOW (diagsize) = false;
12049 : : }
12050 : :
12051 : : /* Verify that the array has a positive number of elements
12052 : : and issue the appropriate diagnostic if it doesn't. */
12053 : 1928168 : if (!valid_array_size_p (loc, diagsize, name, (complain & tf_error)))
12054 : : {
12055 : 457 : if (!(complain & tf_error))
12056 : 15 : return error_mark_node;
12057 : 442 : size = integer_one_node;
12058 : : }
12059 : : /* As an extension we allow zero-sized arrays. */
12060 : 1927711 : else if (integer_zerop (size))
12061 : : {
12062 : 3034 : if (!(complain & tf_error))
12063 : : /* We must fail if performing argument deduction (as
12064 : : indicated by the state of complain), so that
12065 : : another substitution can be found. */
12066 : 8 : return error_mark_node;
12067 : 3026 : else if (name)
12068 : 2870 : pedwarn (loc, OPT_Wpedantic,
12069 : : "ISO C++ forbids zero-size array %qD", name);
12070 : : else
12071 : 156 : pedwarn (loc, OPT_Wpedantic,
12072 : : "ISO C++ forbids zero-size array");
12073 : : }
12074 : : }
12075 : 1641 : else if (TREE_CONSTANT (size)
12076 : : /* We don't allow VLAs at non-function scopes, or during
12077 : : tentative template substitution. */
12078 : 1626 : || !at_function_scope_p ()
12079 : 3099 : || !(complain & tf_error))
12080 : : {
12081 : 189 : if (!(complain & tf_error))
12082 : 144 : return error_mark_node;
12083 : : /* `(int) &fn' is not a valid array bound. */
12084 : 45 : if (name)
12085 : 37 : error_at (loc,
12086 : : "size of array %qD is not an integral constant-expression",
12087 : : name);
12088 : : else
12089 : 8 : error_at (loc, "size of array is not an integral constant-expression");
12090 : 45 : size = integer_one_node;
12091 : : }
12092 : 1452 : else if (pedantic && warn_vla != 0)
12093 : : {
12094 : 30 : if (name)
12095 : 15 : pedwarn (name_loc, OPT_Wvla,
12096 : : "ISO C++ forbids variable length array %qD", name);
12097 : : else
12098 : 15 : pedwarn (input_location, OPT_Wvla,
12099 : : "ISO C++ forbids variable length array");
12100 : : }
12101 : 1422 : else if (warn_vla > 0)
12102 : : {
12103 : 3 : if (name)
12104 : 3 : warning_at (name_loc, OPT_Wvla,
12105 : : "variable length array %qD is used", name);
12106 : : else
12107 : 0 : warning (OPT_Wvla,
12108 : : "variable length array is used");
12109 : : }
12110 : :
12111 : 1929642 : if (processing_template_decl && !TREE_CONSTANT (size))
12112 : 61 : goto in_template;
12113 : : else
12114 : : {
12115 : 1929581 : if (!TREE_CONSTANT (size))
12116 : : {
12117 : : /* A variable sized array. Arrange for the SAVE_EXPR on the inside
12118 : : of the MINUS_EXPR, which allows the -1 to get folded with the +1
12119 : : that happens when building TYPE_SIZE. */
12120 : 1391 : size = variable_size (size);
12121 : 1391 : stabilize_vla_size (size);
12122 : : }
12123 : :
12124 : : /* Compute the index of the largest element in the array. It is
12125 : : one less than the number of elements in the array. We save
12126 : : and restore PROCESSING_TEMPLATE_DECL so that computations in
12127 : : cp_build_binary_op will be appropriately folded. */
12128 : 1929581 : {
12129 : 1929581 : processing_template_decl_sentinel s;
12130 : 1929581 : itype = cp_build_binary_op (input_location,
12131 : : MINUS_EXPR,
12132 : : cp_convert (ssizetype, size, complain),
12133 : : cp_convert (ssizetype, integer_one_node,
12134 : : complain),
12135 : : complain);
12136 : 1929581 : itype = maybe_constant_value (itype, NULL_TREE, mce_true);
12137 : 1929581 : }
12138 : :
12139 : 1929581 : if (!TREE_CONSTANT (itype))
12140 : : {
12141 : 1391 : if (sanitize_flags_p (SANITIZE_VLA)
12142 : 1391 : && current_function_decl != NULL_TREE)
12143 : : {
12144 : : /* We have to add 1 -- in the ubsan routine we generate
12145 : : LE_EXPR rather than LT_EXPR. */
12146 : 69 : tree t = fold_build2 (PLUS_EXPR, TREE_TYPE (itype), itype,
12147 : : build_one_cst (TREE_TYPE (itype)));
12148 : 69 : t = ubsan_instrument_vla (input_location, t);
12149 : 69 : finish_expr_stmt (t);
12150 : : }
12151 : : }
12152 : : /* Make sure that there was no overflow when creating to a signed
12153 : : index type. (For example, on a 32-bit machine, an array with
12154 : : size 2^32 - 1 is too big.) */
12155 : 1928190 : else if (TREE_CODE (itype) == INTEGER_CST
12156 : 1928190 : && TREE_OVERFLOW (itype))
12157 : : {
12158 : 0 : if (!(complain & tf_error))
12159 : 0 : return error_mark_node;
12160 : 0 : error ("overflow in array dimension");
12161 : 0 : TREE_OVERFLOW (itype) = 0;
12162 : : }
12163 : : }
12164 : :
12165 : : /* Create and return the appropriate index type. */
12166 : 1929581 : itype = build_index_type (itype);
12167 : :
12168 : : /* If the index type were dependent, we would have returned early, so
12169 : : remember that it isn't. */
12170 : 1929581 : TYPE_DEPENDENT_P (itype) = 0;
12171 : 1929581 : TYPE_DEPENDENT_P_VALID (itype) = 1;
12172 : 1929581 : return itype;
12173 : : }
12174 : :
12175 : : tree
12176 : 252861 : compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
12177 : : {
12178 : 252861 : return compute_array_index_type_loc (input_location, name, size, complain);
12179 : : }
12180 : :
12181 : : /* Returns the scope (if any) in which the entity declared by
12182 : : DECLARATOR will be located. If the entity was declared with an
12183 : : unqualified name, NULL_TREE is returned. */
12184 : :
12185 : : tree
12186 : 646285211 : get_scope_of_declarator (const cp_declarator *declarator)
12187 : : {
12188 : 754557663 : while (declarator && declarator->kind != cdk_id)
12189 : 108272452 : declarator = declarator->declarator;
12190 : :
12191 : : /* If the declarator-id is a SCOPE_REF, the scope in which the
12192 : : declaration occurs is the first operand. */
12193 : 646285211 : if (declarator
12194 : 645060541 : && declarator->u.id.qualifying_scope)
12195 : : return declarator->u.id.qualifying_scope;
12196 : :
12197 : : /* Otherwise, the declarator is not a qualified name; the entity will
12198 : : be declared in the current scope. */
12199 : : return NULL_TREE;
12200 : : }
12201 : :
12202 : : /* Returns an ARRAY_TYPE for an array with SIZE elements of the
12203 : : indicated TYPE. If non-NULL, NAME is the NAME of the declaration
12204 : : with this type. */
12205 : :
12206 : : static tree
12207 : 2965283 : create_array_type_for_decl (tree name, tree type, tree size, location_t loc)
12208 : : {
12209 : 2965283 : tree itype = NULL_TREE;
12210 : :
12211 : : /* If things have already gone awry, bail now. */
12212 : 2965283 : if (type == error_mark_node || size == error_mark_node)
12213 : : return error_mark_node;
12214 : :
12215 : : /* [dcl.type.class.deduct] prohibits forming an array of placeholder
12216 : : for a deduced class type. */
12217 : 2965220 : if (template_placeholder_p (type))
12218 : : {
12219 : 6 : if (name)
12220 : 0 : error_at (loc, "%qD declared as array of template placeholder "
12221 : : "type %qT", name, type);
12222 : : else
12223 : 6 : error ("creating array of template placeholder type %qT", type);
12224 : 6 : return error_mark_node;
12225 : : }
12226 : :
12227 : : /* If there are some types which cannot be array elements,
12228 : : issue an error-message and return. */
12229 : 2965214 : switch (TREE_CODE (type))
12230 : : {
12231 : 3 : case VOID_TYPE:
12232 : 3 : if (name)
12233 : 0 : error_at (loc, "declaration of %qD as array of void", name);
12234 : : else
12235 : 3 : error ("creating array of void");
12236 : 3 : return error_mark_node;
12237 : :
12238 : 6 : case FUNCTION_TYPE:
12239 : 6 : if (name)
12240 : 6 : error_at (loc, "declaration of %qD as array of functions", name);
12241 : : else
12242 : 0 : error ("creating array of functions");
12243 : 6 : return error_mark_node;
12244 : :
12245 : 21 : case REFERENCE_TYPE:
12246 : 21 : if (name)
12247 : 15 : error_at (loc, "declaration of %qD as array of references", name);
12248 : : else
12249 : 6 : error ("creating array of references");
12250 : 21 : return error_mark_node;
12251 : :
12252 : 0 : case METHOD_TYPE:
12253 : 0 : if (name)
12254 : 0 : error_at (loc, "declaration of %qD as array of function members",
12255 : : name);
12256 : : else
12257 : 0 : error ("creating array of function members");
12258 : 0 : return error_mark_node;
12259 : :
12260 : 2965184 : default:
12261 : 2965184 : break;
12262 : : }
12263 : :
12264 : 2965184 : if (!verify_type_context (name ? loc : input_location,
12265 : : TCTX_ARRAY_ELEMENT, type))
12266 : 0 : return error_mark_node;
12267 : :
12268 : : /* [dcl.array]
12269 : :
12270 : : The constant expressions that specify the bounds of the arrays
12271 : : can be omitted only for the first member of the sequence. */
12272 : 2965184 : if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
12273 : : {
12274 : 30 : if (name)
12275 : 24 : error_at (loc, "declaration of %qD as multidimensional array must "
12276 : : "have bounds for all dimensions except the first",
12277 : : name);
12278 : : else
12279 : 6 : error ("multidimensional array must have bounds for all "
12280 : : "dimensions except the first");
12281 : :
12282 : 30 : return error_mark_node;
12283 : : }
12284 : :
12285 : : /* Figure out the index type for the array. */
12286 : 2965154 : if (size)
12287 : : {
12288 : 2284311 : itype = compute_array_index_type_loc (loc, name, size,
12289 : : tf_warning_or_error);
12290 : 2284311 : if (type_uses_auto (type)
12291 : 2284311 : && variably_modified_type_p (itype, /*fn=*/NULL_TREE))
12292 : : {
12293 : 9 : sorry_at (loc, "variable-length array of %<auto%>");
12294 : 9 : return error_mark_node;
12295 : : }
12296 : : }
12297 : :
12298 : 2965145 : return build_cplus_array_type (type, itype);
12299 : : }
12300 : :
12301 : : /* Returns the smallest location that is not UNKNOWN_LOCATION. */
12302 : :
12303 : : static location_t
12304 : 866417995 : min_location (location_t loca, location_t locb)
12305 : : {
12306 : 866417995 : if (loca == UNKNOWN_LOCATION
12307 : 866417995 : || (locb != UNKNOWN_LOCATION
12308 : 96781161 : && linemap_location_before_p (line_table, locb, loca)))
12309 : 770953926 : return locb;
12310 : : return loca;
12311 : : }
12312 : :
12313 : : /* Returns the smallest location != UNKNOWN_LOCATION among the
12314 : : three stored in LOCATIONS[ds_const], LOCATIONS[ds_volatile],
12315 : : and LOCATIONS[ds_restrict]. */
12316 : :
12317 : : static location_t
12318 : 864908051 : smallest_type_quals_location (int type_quals, const location_t* locations)
12319 : : {
12320 : 864908051 : location_t loc = UNKNOWN_LOCATION;
12321 : :
12322 : 864908051 : if (type_quals & TYPE_QUAL_CONST)
12323 : 95473982 : loc = locations[ds_const];
12324 : :
12325 : 864908051 : if (type_quals & TYPE_QUAL_VOLATILE)
12326 : 1509850 : loc = min_location (loc, locations[ds_volatile]);
12327 : :
12328 : 864908051 : if (type_quals & TYPE_QUAL_RESTRICT)
12329 : 43 : loc = min_location (loc, locations[ds_restrict]);
12330 : :
12331 : 864908051 : return loc;
12332 : : }
12333 : :
12334 : : /* Returns the smallest among the latter and locations[ds_type_spec]. */
12335 : :
12336 : : static location_t
12337 : 864908033 : smallest_type_location (int type_quals, const location_t* locations)
12338 : : {
12339 : 864908033 : location_t loc = smallest_type_quals_location (type_quals, locations);
12340 : 864908033 : return min_location (loc, locations[ds_type_spec]);
12341 : : }
12342 : :
12343 : : static location_t
12344 : 26 : smallest_type_location (const cp_decl_specifier_seq *declspecs)
12345 : : {
12346 : 26 : int type_quals = get_type_quals (declspecs);
12347 : 26 : return smallest_type_location (type_quals, declspecs->locations);
12348 : : }
12349 : :
12350 : : /* Check that it's OK to declare a function with the indicated TYPE
12351 : : and TYPE_QUALS. SFK indicates the kind of special function (if any)
12352 : : that this function is. OPTYPE is the type given in a conversion
12353 : : operator declaration, or the class type for a constructor/destructor.
12354 : : Returns the actual return type of the function; that may be different
12355 : : than TYPE if an error occurs, or for certain special functions. */
12356 : :
12357 : : static tree
12358 : 25376314 : check_special_function_return_type (special_function_kind sfk,
12359 : : tree type,
12360 : : tree optype,
12361 : : int type_quals,
12362 : : const location_t* locations)
12363 : : {
12364 : 25376314 : switch (sfk)
12365 : : {
12366 : 20914939 : case sfk_constructor:
12367 : 20914939 : if (type)
12368 : 24 : error_at (smallest_type_location (type_quals, locations),
12369 : : "return type specification for constructor invalid");
12370 : 20914915 : else if (type_quals != TYPE_UNQUALIFIED)
12371 : 15 : error_at (smallest_type_quals_location (type_quals, locations),
12372 : : "qualifiers are not allowed on constructor declaration");
12373 : :
12374 : 20914939 : if (targetm.cxx.cdtor_returns_this ())
12375 : 0 : type = build_pointer_type (optype);
12376 : : else
12377 : 20914939 : type = void_type_node;
12378 : : break;
12379 : :
12380 : 2981291 : case sfk_destructor:
12381 : 2981291 : if (type)
12382 : 21 : error_at (smallest_type_location (type_quals, locations),
12383 : : "return type specification for destructor invalid");
12384 : 2981270 : else if (type_quals != TYPE_UNQUALIFIED)
12385 : 0 : error_at (smallest_type_quals_location (type_quals, locations),
12386 : : "qualifiers are not allowed on destructor declaration");
12387 : :
12388 : : /* We can't use the proper return type here because we run into
12389 : : problems with ambiguous bases and covariant returns. */
12390 : 2981291 : if (targetm.cxx.cdtor_returns_this ())
12391 : 0 : type = build_pointer_type (void_type_node);
12392 : : else
12393 : 2981291 : type = void_type_node;
12394 : : break;
12395 : :
12396 : 583286 : case sfk_conversion:
12397 : 583286 : if (type)
12398 : 27 : error_at (smallest_type_location (type_quals, locations),
12399 : : "return type specified for %<operator %T%>", optype);
12400 : 583259 : else if (type_quals != TYPE_UNQUALIFIED)
12401 : 3 : error_at (smallest_type_quals_location (type_quals, locations),
12402 : : "qualifiers are not allowed on declaration of "
12403 : : "%<operator %T%>", optype);
12404 : :
12405 : : type = optype;
12406 : : break;
12407 : :
12408 : 896798 : case sfk_deduction_guide:
12409 : 896798 : if (type)
12410 : 0 : error_at (smallest_type_location (type_quals, locations),
12411 : : "return type specified for deduction guide");
12412 : 896798 : else if (type_quals != TYPE_UNQUALIFIED)
12413 : 0 : error_at (smallest_type_quals_location (type_quals, locations),
12414 : : "qualifiers are not allowed on declaration of "
12415 : : "deduction guide");
12416 : 896798 : if (TREE_CODE (optype) == TEMPLATE_TEMPLATE_PARM)
12417 : : {
12418 : 3 : error ("template template parameter %qT in declaration of "
12419 : : "deduction guide", optype);
12420 : 3 : type = error_mark_node;
12421 : : }
12422 : : else
12423 : 896795 : type = make_template_placeholder (CLASSTYPE_TI_TEMPLATE (optype));
12424 : 24213546 : for (int i = 0; i < ds_last; ++i)
12425 : 23316748 : if (i != ds_explicit && locations[i])
12426 : 3 : error_at (locations[i],
12427 : : "%<decl-specifier%> in declaration of deduction guide");
12428 : : break;
12429 : :
12430 : 0 : default:
12431 : 0 : gcc_unreachable ();
12432 : : }
12433 : :
12434 : 25376314 : return type;
12435 : : }
12436 : :
12437 : : /* A variable or data member (whose unqualified name is IDENTIFIER)
12438 : : has been declared with the indicated TYPE. If the TYPE is not
12439 : : acceptable, issue an error message and return a type to use for
12440 : : error-recovery purposes. */
12441 : :
12442 : : tree
12443 : 266957431 : check_var_type (tree identifier, tree type, location_t loc)
12444 : : {
12445 : 266957431 : if (VOID_TYPE_P (type))
12446 : : {
12447 : 88 : if (!identifier)
12448 : 0 : error_at (loc, "unnamed variable or field declared void");
12449 : 88 : else if (identifier_p (identifier))
12450 : : {
12451 : 88 : gcc_assert (!IDENTIFIER_ANY_OP_P (identifier));
12452 : 88 : error_at (loc, "variable or field %qE declared void",
12453 : : identifier);
12454 : : }
12455 : : else
12456 : 0 : error_at (loc, "variable or field declared void");
12457 : 88 : type = error_mark_node;
12458 : : }
12459 : :
12460 : 266957431 : return type;
12461 : : }
12462 : :
12463 : : /* Handle declaring DECL as an inline variable. */
12464 : :
12465 : : static void
12466 : 3666928 : mark_inline_variable (tree decl, location_t loc)
12467 : : {
12468 : 3666928 : bool inlinep = true;
12469 : 3666928 : if (! toplevel_bindings_p ())
12470 : : {
12471 : 6 : error_at (loc, "%<inline%> specifier invalid for variable "
12472 : : "%qD declared at block scope", decl);
12473 : 6 : inlinep = false;
12474 : : }
12475 : 3666922 : else if (cxx_dialect < cxx17)
12476 : 638 : pedwarn (loc, OPT_Wc__17_extensions, "inline variables are only available "
12477 : : "with %<-std=c++17%> or %<-std=gnu++17%>");
12478 : 644 : if (inlinep)
12479 : : {
12480 : 3666922 : retrofit_lang_decl (decl);
12481 : 3666922 : SET_DECL_VAR_DECLARED_INLINE_P (decl);
12482 : : }
12483 : 3666928 : }
12484 : :
12485 : :
12486 : : /* Assign a typedef-given name to a class or enumeration type declared
12487 : : as anonymous at first. This was split out of grokdeclarator
12488 : : because it is also used in libcc1. */
12489 : :
12490 : : void
12491 : 367340 : name_unnamed_type (tree type, tree decl)
12492 : : {
12493 : 1102020 : gcc_assert (TYPE_UNNAMED_P (type));
12494 : :
12495 : : /* Replace the anonymous decl with the real decl. Be careful not to
12496 : : rename other typedefs (such as the self-reference) of type. */
12497 : 367340 : tree orig = TYPE_NAME (type);
12498 : 1100462 : for (tree t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
12499 : 733122 : if (TYPE_NAME (t) == orig)
12500 : 367340 : TYPE_NAME (t) = decl;
12501 : :
12502 : : /* If this is a typedef within a template class, the nested
12503 : : type is a (non-primary) template. The name for the
12504 : : template needs updating as well. */
12505 : 367340 : if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
12506 : 55 : DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)) = DECL_NAME (decl);
12507 : :
12508 : : /* Adjust linkage now that we aren't unnamed anymore. */
12509 : 367340 : reset_type_linkage (type);
12510 : :
12511 : : /* FIXME remangle member functions; member functions of a
12512 : : type with external linkage have external linkage. */
12513 : :
12514 : : /* Check that our job is done, and that it would fail if we
12515 : : attempted to do it again. */
12516 : 734680 : gcc_assert (!TYPE_UNNAMED_P (type));
12517 : 367340 : }
12518 : :
12519 : : /* Check that decltype(auto) was well-formed: only plain decltype(auto)
12520 : : is allowed. TYPE might contain a decltype(auto). Returns true if
12521 : : there was a problem, false otherwise. */
12522 : :
12523 : : static bool
12524 : 547462435 : check_decltype_auto (location_t loc, tree type)
12525 : : {
12526 : 547462435 : if (tree a = type_uses_auto (type))
12527 : : {
12528 : 8668495 : if (AUTO_IS_DECLTYPE (a))
12529 : : {
12530 : 290231 : if (a != type)
12531 : : {
12532 : 33 : error_at (loc, "%qT as type rather than plain "
12533 : : "%<decltype(auto)%>", type);
12534 : 33 : return true;
12535 : : }
12536 : 290198 : else if (TYPE_QUALS (type) != TYPE_UNQUALIFIED)
12537 : : {
12538 : 35 : error_at (loc, "%<decltype(auto)%> cannot be cv-qualified");
12539 : 35 : return true;
12540 : : }
12541 : : }
12542 : : }
12543 : : return false;
12544 : : }
12545 : :
12546 : : /* Issue an error about two mutually incompatible declspecs
12547 : : with the given names and locations
12548 : : e.g. "error: `signed' and `unsigned' specified together" */
12549 : :
12550 : : static void
12551 : 66 : complain_about_incompatible_declspecs (const char *name_a, location_t loc_a,
12552 : : const char *name_b, location_t loc_b)
12553 : : {
12554 : 66 : gcc_rich_location richloc (loc_a, nullptr, highlight_colors::lhs);
12555 : 66 : richloc.add_range (loc_b, SHOW_RANGE_WITHOUT_CARET,
12556 : : nullptr, highlight_colors::rhs);
12557 : 66 : pp_element_quoted_string e_name_a (name_a, highlight_colors::lhs);
12558 : 66 : pp_element_quoted_string e_name_b (name_b, highlight_colors::rhs);
12559 : 66 : error_at (&richloc, "%e and %e specified together",
12560 : : &e_name_a, &e_name_b);
12561 : 66 : }
12562 : :
12563 : : /* Given declspecs and a declarator (abstract or otherwise), determine
12564 : : the name and type of the object declared and construct a DECL node
12565 : : for it.
12566 : :
12567 : : DECLSPECS points to the representation of declaration-specifier
12568 : : sequence that precedes declarator.
12569 : :
12570 : : DECL_CONTEXT says which syntactic context this declaration is in:
12571 : : NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
12572 : : FUNCDEF for a function definition. Like NORMAL but a few different
12573 : : error messages in each case. Return value may be zero meaning
12574 : : this definition is too screwy to try to parse.
12575 : : MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
12576 : : handle member functions (which have FIELD context).
12577 : : Return value may be zero meaning this definition is too screwy to
12578 : : try to parse.
12579 : : PARM for a parameter declaration (either within a function prototype
12580 : : or before a function body). Make a PARM_DECL, or return void_type_node.
12581 : : TPARM for a template parameter declaration.
12582 : : CATCHPARM for a parameter declaration before a catch clause.
12583 : : TYPENAME if for a typename (in a cast or sizeof).
12584 : : Don't make a DECL node; just return the ..._TYPE node.
12585 : : FIELD for a struct or union field; make a FIELD_DECL.
12586 : : BITFIELD for a field with specified width.
12587 : :
12588 : : INITIALIZED is as for start_decl.
12589 : :
12590 : : ATTRLIST is a pointer to the list of attributes, which may be NULL
12591 : : if there are none; *ATTRLIST may be modified if attributes from inside
12592 : : the declarator should be applied to the declaration.
12593 : :
12594 : : When this function is called, scoping variables (such as
12595 : : CURRENT_CLASS_TYPE) should reflect the scope in which the
12596 : : declaration occurs, not the scope in which the new declaration will
12597 : : be placed. For example, on:
12598 : :
12599 : : void S::f() { ... }
12600 : :
12601 : : when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
12602 : : should not be `S'.
12603 : :
12604 : : Returns a DECL (if a declarator is present), a TYPE (if there is no
12605 : : declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
12606 : : error occurs. */
12607 : :
12608 : : tree
12609 : 864907935 : grokdeclarator (const cp_declarator *declarator,
12610 : : cp_decl_specifier_seq *declspecs,
12611 : : enum decl_context decl_context,
12612 : : int initialized,
12613 : : tree* attrlist)
12614 : : {
12615 : 864907935 : tree type = NULL_TREE;
12616 : 864907935 : int longlong = 0;
12617 : 864907935 : int explicit_intN = 0;
12618 : 864907935 : int int_n_alt = 0;
12619 : 864907935 : int virtualp, explicitp, friendp, inlinep, staticp;
12620 : 864907935 : int explicit_int = 0;
12621 : 864907935 : int explicit_char = 0;
12622 : 864907935 : int defaulted_int = 0;
12623 : :
12624 : 864907935 : tree typedef_decl = NULL_TREE;
12625 : 864907935 : const char *name = NULL;
12626 : 864907935 : tree typedef_type = NULL_TREE;
12627 : : /* True if this declarator is a function definition. */
12628 : 864907935 : bool funcdef_flag = false;
12629 : 864907935 : cp_declarator_kind innermost_code = cdk_error;
12630 : 864907935 : int bitfield = 0;
12631 : : #if 0
12632 : : /* See the code below that used this. */
12633 : : tree decl_attr = NULL_TREE;
12634 : : #endif
12635 : :
12636 : : /* Keep track of what sort of function is being processed
12637 : : so that we can warn about default return values, or explicit
12638 : : return values which do not match prescribed defaults. */
12639 : 864907935 : special_function_kind sfk = sfk_none;
12640 : :
12641 : 864907935 : tree dname = NULL_TREE;
12642 : 864907935 : tree ctor_return_type = NULL_TREE;
12643 : 864907935 : enum overload_flags flags = NO_SPECIAL;
12644 : : /* cv-qualifiers that apply to the declarator, for a declaration of
12645 : : a member function. */
12646 : 864907935 : cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
12647 : : /* virt-specifiers that apply to the declarator, for a declaration of
12648 : : a member function. */
12649 : 864907935 : cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
12650 : : /* ref-qualifier that applies to the declarator, for a declaration of
12651 : : a member function. */
12652 : 864907935 : cp_ref_qualifier rqual = REF_QUAL_NONE;
12653 : : /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
12654 : 864907935 : int type_quals = get_type_quals (declspecs);
12655 : 864907935 : tree raises = NULL_TREE;
12656 : 864907935 : int template_count = 0;
12657 : 864907935 : tree returned_attrs = NULL_TREE;
12658 : 864907935 : tree parms = NULL_TREE;
12659 : 864907935 : const cp_declarator *id_declarator;
12660 : : /* The unqualified name of the declarator; either an
12661 : : IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
12662 : 864907935 : tree unqualified_id;
12663 : : /* The class type, if any, in which this entity is located,
12664 : : or NULL_TREE if none. Note that this value may be different from
12665 : : the current class type; for example if an attempt is made to declare
12666 : : "A::f" inside "B", this value will be "A". */
12667 : 864907935 : tree ctype = current_class_type;
12668 : : /* The NAMESPACE_DECL for the namespace in which this entity is
12669 : : located. If an unqualified name is used to declare the entity,
12670 : : this value will be NULL_TREE, even if the entity is located at
12671 : : namespace scope. */
12672 : 864907935 : tree in_namespace = NULL_TREE;
12673 : 864907935 : cp_storage_class storage_class;
12674 : 864907935 : bool unsigned_p, signed_p, short_p, long_p, thread_p;
12675 : 864907935 : bool type_was_error_mark_node = false;
12676 : 864907935 : bool parameter_pack_p = declarator ? declarator->parameter_pack_p : false;
12677 : 864907935 : bool template_type_arg = false;
12678 : 864907935 : bool template_parm_flag = false;
12679 : 864907935 : bool typedef_p = decl_spec_seq_has_spec_p (declspecs, ds_typedef);
12680 : 864907935 : bool constexpr_p = decl_spec_seq_has_spec_p (declspecs, ds_constexpr);
12681 : 864907935 : bool constinit_p = decl_spec_seq_has_spec_p (declspecs, ds_constinit);
12682 : 864907935 : bool consteval_p = decl_spec_seq_has_spec_p (declspecs, ds_consteval);
12683 : 864907935 : bool late_return_type_p = false;
12684 : 864907935 : bool array_parameter_p = false;
12685 : 864907935 : tree reqs = NULL_TREE;
12686 : :
12687 : 864907935 : signed_p = decl_spec_seq_has_spec_p (declspecs, ds_signed);
12688 : 864907935 : unsigned_p = decl_spec_seq_has_spec_p (declspecs, ds_unsigned);
12689 : 864907935 : short_p = decl_spec_seq_has_spec_p (declspecs, ds_short);
12690 : 864907935 : long_p = decl_spec_seq_has_spec_p (declspecs, ds_long);
12691 : 864907935 : longlong = decl_spec_seq_has_spec_p (declspecs, ds_long_long);
12692 : 864907935 : explicit_intN = declspecs->explicit_intN_p;
12693 : 864907935 : int_n_alt = declspecs->int_n_alt;
12694 : 864907935 : thread_p = decl_spec_seq_has_spec_p (declspecs, ds_thread);
12695 : :
12696 : : // Was concept_p specified? Note that ds_concept
12697 : : // implies ds_constexpr!
12698 : 864907935 : bool concept_p = decl_spec_seq_has_spec_p (declspecs, ds_concept);
12699 : 864907935 : if (concept_p)
12700 : 114 : constexpr_p = true;
12701 : :
12702 : 864907935 : if (decl_context == FUNCDEF)
12703 : : funcdef_flag = true, decl_context = NORMAL;
12704 : : else if (decl_context == MEMFUNCDEF)
12705 : : funcdef_flag = true, decl_context = FIELD;
12706 : : else if (decl_context == BITFIELD)
12707 : : bitfield = 1, decl_context = FIELD;
12708 : : else if (decl_context == TEMPLATE_TYPE_ARG)
12709 : : template_type_arg = true, decl_context = TYPENAME;
12710 : : else if (decl_context == TPARM)
12711 : 11382501 : template_parm_flag = true, decl_context = PARM;
12712 : :
12713 : 864907935 : if (initialized == SD_DEFAULTED || initialized == SD_DELETED)
12714 : 8768610 : funcdef_flag = true;
12715 : :
12716 : 864907935 : location_t typespec_loc = loc_or_input_loc (smallest_type_location
12717 : : (type_quals,
12718 : 864907935 : declspecs->locations));
12719 : 864907935 : location_t id_loc;
12720 : 864907935 : location_t init_loc;
12721 : 864907935 : if (declarator)
12722 : : {
12723 : 537798048 : id_loc = loc_or_input_loc (declarator->id_loc);
12724 : 537798048 : init_loc = loc_or_input_loc (declarator->init_loc);
12725 : : }
12726 : : else
12727 : 327109887 : init_loc = id_loc = input_location;
12728 : :
12729 : : /* Look inside a declarator for the name being declared
12730 : : and get it as a string, for an error message. */
12731 : 864907935 : for (id_declarator = declarator;
12732 : 1203781449 : id_declarator;
12733 : 338873514 : id_declarator = id_declarator->declarator)
12734 : : {
12735 : 842211213 : if (id_declarator->kind != cdk_id)
12736 : 338873539 : innermost_code = id_declarator->kind;
12737 : :
12738 : 842211213 : switch (id_declarator->kind)
12739 : : {
12740 : 165530299 : case cdk_function:
12741 : 165530299 : if (id_declarator->declarator
12742 : 165050468 : && id_declarator->declarator->kind == cdk_id)
12743 : : {
12744 : 163198440 : sfk = id_declarator->declarator->u.id.sfk;
12745 : 163198440 : if (sfk == sfk_destructor)
12746 : 2981294 : flags = DTOR_FLAG;
12747 : : }
12748 : : break;
12749 : :
12750 : 503337674 : case cdk_id:
12751 : 503337674 : {
12752 : 503337674 : tree qualifying_scope = id_declarator->u.id.qualifying_scope;
12753 : 503337674 : tree decl = id_declarator->u.id.unqualified_name;
12754 : 503337674 : if (!decl)
12755 : : break;
12756 : 503337674 : if (qualifying_scope)
12757 : : {
12758 : 9221961 : if (check_for_bare_parameter_packs (qualifying_scope,
12759 : 9221961 : id_declarator->id_loc))
12760 : 6 : return error_mark_node;
12761 : 9221955 : if (at_function_scope_p ())
12762 : : {
12763 : : /* [dcl.meaning]
12764 : :
12765 : : A declarator-id shall not be qualified except
12766 : : for ...
12767 : :
12768 : : None of the cases are permitted in block
12769 : : scope. */
12770 : 0 : if (qualifying_scope == global_namespace)
12771 : 0 : error ("invalid use of qualified-name %<::%D%>",
12772 : : decl);
12773 : 0 : else if (TYPE_P (qualifying_scope))
12774 : 0 : error ("invalid use of qualified-name %<%T::%D%>",
12775 : : qualifying_scope, decl);
12776 : : else
12777 : 0 : error ("invalid use of qualified-name %<%D::%D%>",
12778 : : qualifying_scope, decl);
12779 : 0 : return error_mark_node;
12780 : : }
12781 : 9221955 : else if (TYPE_P (qualifying_scope))
12782 : : {
12783 : 9128374 : ctype = qualifying_scope;
12784 : 9128374 : if (!MAYBE_CLASS_TYPE_P (ctype))
12785 : : {
12786 : 6 : error_at (id_declarator->id_loc,
12787 : : "%q#T is not a class or namespace", ctype);
12788 : 6 : ctype = NULL_TREE;
12789 : : }
12790 : 9128368 : else if (innermost_code != cdk_function
12791 : 368276 : && current_class_type
12792 : 9128383 : && !uniquely_derived_from_p (ctype,
12793 : : current_class_type))
12794 : : {
12795 : 9 : error_at (id_declarator->id_loc,
12796 : : "invalid use of qualified-name %<%T::%D%>",
12797 : : qualifying_scope, decl);
12798 : 9 : return error_mark_node;
12799 : : }
12800 : : }
12801 : 93581 : else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
12802 : 503337659 : in_namespace = qualifying_scope;
12803 : : }
12804 : 503337659 : switch (TREE_CODE (decl))
12805 : : {
12806 : 2981309 : case BIT_NOT_EXPR:
12807 : 2981309 : {
12808 : 2981309 : if (innermost_code != cdk_function)
12809 : : {
12810 : 6 : error_at (EXPR_LOCATION (decl),
12811 : : "declaration of %qE as non-function", decl);
12812 : 6 : return error_mark_node;
12813 : : }
12814 : 2981303 : else if (!qualifying_scope
12815 : 2981303 : && !(current_class_type && at_class_scope_p ()))
12816 : : {
12817 : 9 : error_at (EXPR_LOCATION (decl),
12818 : : "declaration of %qE as non-member", decl);
12819 : 9 : return error_mark_node;
12820 : : }
12821 : :
12822 : 2981294 : tree type = TREE_OPERAND (decl, 0);
12823 : 2981294 : if (TYPE_P (type))
12824 : 2981291 : type = constructor_name (type);
12825 : 2981294 : name = identifier_to_locale (IDENTIFIER_POINTER (type));
12826 : 2981294 : dname = decl;
12827 : : }
12828 : 2981294 : break;
12829 : :
12830 : 1783339 : case TEMPLATE_ID_EXPR:
12831 : 1783339 : {
12832 : 1783339 : tree fns = TREE_OPERAND (decl, 0);
12833 : :
12834 : 1783339 : dname = fns;
12835 : 2631857 : if (!identifier_p (dname))
12836 : 1783324 : dname = OVL_NAME (dname);
12837 : : }
12838 : : /* Fall through. */
12839 : :
12840 : 500356350 : case IDENTIFIER_NODE:
12841 : 500356350 : if (identifier_p (decl))
12842 : 498573011 : dname = decl;
12843 : :
12844 : 500356350 : if (IDENTIFIER_KEYWORD_P (dname))
12845 : : {
12846 : 0 : error ("declarator-id missing; using reserved word %qD",
12847 : : dname);
12848 : 0 : name = identifier_to_locale (IDENTIFIER_POINTER (dname));
12849 : : }
12850 : 500356350 : else if (!IDENTIFIER_CONV_OP_P (dname))
12851 : 499773061 : name = identifier_to_locale (IDENTIFIER_POINTER (dname));
12852 : : else
12853 : : {
12854 : 583289 : gcc_assert (flags == NO_SPECIAL);
12855 : 583289 : flags = TYPENAME_FLAG;
12856 : 583289 : sfk = sfk_conversion;
12857 : 583289 : tree glob = get_global_binding (dname);
12858 : 583289 : if (glob && TREE_CODE (glob) == TYPE_DECL)
12859 : 0 : name = identifier_to_locale (IDENTIFIER_POINTER (dname));
12860 : : else
12861 : : name = "<invalid operator>";
12862 : : }
12863 : : break;
12864 : :
12865 : 0 : default:
12866 : 0 : gcc_unreachable ();
12867 : : }
12868 : : break;
12869 : : }
12870 : :
12871 : : case cdk_array:
12872 : : case cdk_pointer:
12873 : : case cdk_reference:
12874 : : case cdk_ptrmem:
12875 : : break;
12876 : :
12877 : : case cdk_decomp:
12878 : 842211158 : name = "structured binding";
12879 : : break;
12880 : :
12881 : 25 : case cdk_error:
12882 : 25 : return error_mark_node;
12883 : :
12884 : 0 : default:
12885 : 0 : gcc_unreachable ();
12886 : : }
12887 : 842211158 : if (id_declarator->kind == cdk_id)
12888 : : break;
12889 : : }
12890 : :
12891 : : /* [dcl.fct.edf]
12892 : :
12893 : : The declarator in a function-definition shall have the form
12894 : : D1 ( parameter-declaration-clause) ... */
12895 : 864907880 : if (funcdef_flag && innermost_code != cdk_function)
12896 : : {
12897 : 3 : error_at (id_loc, "function definition does not declare parameters");
12898 : 3 : return error_mark_node;
12899 : : }
12900 : :
12901 : 864907877 : if (flags == TYPENAME_FLAG
12902 : 864907877 : && innermost_code != cdk_function
12903 : 3 : && ! (ctype && !declspecs->any_specifiers_p))
12904 : : {
12905 : 3 : error_at (id_loc, "declaration of %qD as non-function", dname);
12906 : 3 : return error_mark_node;
12907 : : }
12908 : :
12909 : 864907874 : if (dname && identifier_p (dname))
12910 : : {
12911 : 500356344 : if (UDLIT_OPER_P (dname)
12912 : 500356344 : && innermost_code != cdk_function)
12913 : : {
12914 : 6 : error_at (id_loc, "declaration of %qD as non-function", dname);
12915 : 6 : return error_mark_node;
12916 : : }
12917 : :
12918 : 500356338 : if (IDENTIFIER_ANY_OP_P (dname))
12919 : : {
12920 : 29699364 : if (typedef_p)
12921 : : {
12922 : 3 : error_at (id_loc, "declaration of %qD as %<typedef%>", dname);
12923 : 3 : return error_mark_node;
12924 : : }
12925 : 29699361 : else if (decl_context == PARM || decl_context == CATCHPARM)
12926 : : {
12927 : 15 : error_at (id_loc, "declaration of %qD as parameter", dname);
12928 : 15 : return error_mark_node;
12929 : : }
12930 : : }
12931 : : }
12932 : :
12933 : : /* Anything declared one level down from the top level
12934 : : must be one of the parameters of a function
12935 : : (because the body is at least two levels down). */
12936 : :
12937 : : /* This heuristic cannot be applied to C++ nodes! Fixed, however,
12938 : : by not allowing C++ class definitions to specify their parameters
12939 : : with xdecls (must be spec.d in the parmlist).
12940 : :
12941 : : Since we now wait to push a class scope until we are sure that
12942 : : we are in a legitimate method context, we must set oldcname
12943 : : explicitly (since current_class_name is not yet alive).
12944 : :
12945 : : We also want to avoid calling this a PARM if it is in a namespace. */
12946 : :
12947 : 864907850 : if (decl_context == NORMAL && !toplevel_bindings_p ())
12948 : : {
12949 : 58890541 : cp_binding_level *b = current_binding_level;
12950 : 58890541 : current_binding_level = b->level_chain;
12951 : 58890541 : if (current_binding_level != 0 && toplevel_bindings_p ())
12952 : : decl_context = PARM;
12953 : 58890541 : current_binding_level = b;
12954 : : }
12955 : :
12956 : 864907850 : if (name == NULL)
12957 : 361501364 : name = decl_context == PARM ? "parameter" : "type name";
12958 : :
12959 : 864907850 : if (consteval_p && constexpr_p)
12960 : : {
12961 : 6 : error_at (declspecs->locations[ds_consteval],
12962 : : "both %qs and %qs specified", "constexpr", "consteval");
12963 : 6 : return error_mark_node;
12964 : : }
12965 : :
12966 : 864907844 : if (concept_p && typedef_p)
12967 : : {
12968 : 9 : error_at (declspecs->locations[ds_concept],
12969 : : "%qs cannot appear in a typedef declaration", "concept");
12970 : 9 : return error_mark_node;
12971 : : }
12972 : :
12973 : 864907835 : if (constexpr_p && typedef_p)
12974 : : {
12975 : 3 : error_at (declspecs->locations[ds_constexpr],
12976 : : "%qs cannot appear in a typedef declaration", "constexpr");
12977 : 3 : return error_mark_node;
12978 : : }
12979 : :
12980 : 864907832 : if (consteval_p && typedef_p)
12981 : : {
12982 : 3 : error_at (declspecs->locations[ds_consteval],
12983 : : "%qs cannot appear in a typedef declaration", "consteval");
12984 : 3 : return error_mark_node;
12985 : : }
12986 : :
12987 : 864907829 : if (constinit_p && typedef_p)
12988 : : {
12989 : 3 : error_at (declspecs->locations[ds_constinit],
12990 : : "%qs cannot appear in a typedef declaration", "constinit");
12991 : 3 : return error_mark_node;
12992 : : }
12993 : :
12994 : : /* [dcl.spec]/2 "At most one of the constexpr, consteval, and constinit
12995 : : keywords shall appear in a decl-specifier-seq." */
12996 : 864907826 : if (constinit_p && constexpr_p)
12997 : : {
12998 : 6 : gcc_rich_location richloc (declspecs->locations[ds_constinit]);
12999 : 6 : richloc.add_range (declspecs->locations[ds_constexpr]);
13000 : 6 : error_at (&richloc,
13001 : : "can use at most one of the %<constinit%> and %<constexpr%> "
13002 : : "specifiers");
13003 : 6 : return error_mark_node;
13004 : 6 : }
13005 : :
13006 : : /* If there were multiple types specified in the decl-specifier-seq,
13007 : : issue an error message. */
13008 : 864907820 : if (declspecs->multiple_types_p)
13009 : : {
13010 : 1500 : error_at (typespec_loc,
13011 : : "two or more data types in declaration of %qs", name);
13012 : 1500 : return error_mark_node;
13013 : : }
13014 : :
13015 : 864906320 : if (declspecs->conflicting_specifiers_p)
13016 : 31 : return error_mark_node;
13017 : :
13018 : : /* Extract the basic type from the decl-specifier-seq. */
13019 : 864906289 : type = declspecs->type;
13020 : 864906289 : if (type == error_mark_node)
13021 : : {
13022 : 1143 : type = NULL_TREE;
13023 : 1143 : type_was_error_mark_node = true;
13024 : : }
13025 : :
13026 : : /* Ignore erroneous attributes. */
13027 : 864906289 : if (attrlist && *attrlist == error_mark_node)
13028 : 12 : *attrlist = NULL_TREE;
13029 : :
13030 : : /* An object declared as __attribute__((unavailable)) suppresses
13031 : : any reports of being declared with unavailable or deprecated
13032 : : items. An object declared as __attribute__((deprecated))
13033 : : suppresses warnings of uses of other deprecated items. */
13034 : 864906289 : auto ds = make_temp_override (deprecated_state);
13035 : 864906289 : if (attrlist && lookup_attribute ("unavailable", *attrlist))
13036 : 159 : deprecated_state = UNAVAILABLE_DEPRECATED_SUPPRESS;
13037 : 864906130 : else if (attrlist && lookup_attribute ("deprecated", *attrlist))
13038 : 664076 : deprecated_state = DEPRECATED_SUPPRESS;
13039 : :
13040 : 864906289 : cp_handle_deprecated_or_unavailable (type);
13041 : 864906289 : if (type && TREE_CODE (type) == TYPE_DECL)
13042 : : {
13043 : 593158384 : cp_warn_deprecated_use_scopes (CP_DECL_CONTEXT (type));
13044 : 593158384 : typedef_decl = type;
13045 : 593158384 : type = TREE_TYPE (typedef_decl);
13046 : 593158384 : if (DECL_ARTIFICIAL (typedef_decl))
13047 : 428085984 : cp_handle_deprecated_or_unavailable (type);
13048 : : }
13049 : : /* No type at all: default to `int', and set DEFAULTED_INT
13050 : : because it was not a user-defined typedef. */
13051 : 864906289 : if (type == NULL_TREE)
13052 : : {
13053 : 33292080 : if (signed_p || unsigned_p || long_p || short_p)
13054 : : {
13055 : : /* These imply 'int'. */
13056 : 7914276 : type = integer_type_node;
13057 : 7914276 : defaulted_int = 1;
13058 : : }
13059 : : /* If we just have "complex", it is equivalent to "complex double". */
13060 : 25377804 : else if (!longlong && !explicit_intN
13061 : 25377804 : && decl_spec_seq_has_spec_p (declspecs, ds_complex))
13062 : : {
13063 : 81 : type = double_type_node;
13064 : 81 : pedwarn (declspecs->locations[ds_complex], OPT_Wpedantic,
13065 : : "ISO C++ does not support plain %<complex%> meaning "
13066 : : "%<double complex%>");
13067 : : }
13068 : : }
13069 : : /* Gather flags. */
13070 : 864906289 : explicit_int = declspecs->explicit_int_p;
13071 : 864906289 : explicit_char = declspecs->explicit_char_p;
13072 : :
13073 : : #if 0
13074 : : /* See the code below that used this. */
13075 : : if (typedef_decl)
13076 : : decl_attr = DECL_ATTRIBUTES (typedef_decl);
13077 : : #endif
13078 : 864906289 : typedef_type = type;
13079 : :
13080 : 864906289 : if (sfk == sfk_conversion || sfk == sfk_deduction_guide)
13081 : 1480084 : ctor_return_type = TREE_TYPE (dname);
13082 : : else
13083 : : ctor_return_type = ctype;
13084 : :
13085 : 864906289 : if (sfk != sfk_none)
13086 : : {
13087 : 25376314 : type = check_special_function_return_type (sfk, type,
13088 : : ctor_return_type,
13089 : : type_quals,
13090 : : declspecs->locations);
13091 : 25376314 : type_quals = TYPE_UNQUALIFIED;
13092 : : }
13093 : 839529975 : else if (type == NULL_TREE)
13094 : : {
13095 : 1481 : int is_main;
13096 : :
13097 : 1481 : explicit_int = -1;
13098 : :
13099 : : /* We handle `main' specially here, because 'main () { }' is so
13100 : : common. With no options, it is allowed. With -Wreturn-type,
13101 : : it is a warning. It is only an error with -pedantic-errors. */
13102 : 2962 : is_main = (funcdef_flag
13103 : 3176 : && dname && identifier_p (dname)
13104 : 214 : && MAIN_NAME_P (dname)
13105 : 68 : && ctype == NULL_TREE
13106 : 68 : && in_namespace == NULL_TREE
13107 : 1549 : && current_namespace == global_namespace);
13108 : :
13109 : 1481 : if (type_was_error_mark_node)
13110 : : /* We've already issued an error, don't complain more. */;
13111 : 338 : else if (in_system_header_at (id_loc) || flag_ms_extensions)
13112 : : /* Allow it, sigh. */;
13113 : 276 : else if (! is_main)
13114 : 214 : permerror (id_loc, "ISO C++ forbids declaration of %qs with no type",
13115 : : name);
13116 : 62 : else if (pedantic)
13117 : 4 : pedwarn (id_loc, OPT_Wpedantic,
13118 : : "ISO C++ forbids declaration of %qs with no type", name);
13119 : : else
13120 : 58 : warning_at (id_loc, OPT_Wreturn_type,
13121 : : "ISO C++ forbids declaration of %qs with no type", name);
13122 : :
13123 : 1481 : if (type_was_error_mark_node && template_parm_flag)
13124 : : /* FIXME we should be able to propagate the error_mark_node as is
13125 : : for other contexts too. */
13126 : 151 : type = error_mark_node;
13127 : : else
13128 : 1330 : type = integer_type_node;
13129 : : }
13130 : :
13131 : 864906289 : ctype = NULL_TREE;
13132 : :
13133 : 864906289 : if (explicit_intN)
13134 : : {
13135 : 861381 : if (! int_n_enabled_p[declspecs->int_n_idx])
13136 : : {
13137 : 0 : error_at (declspecs->locations[ds_type_spec],
13138 : : "%<__int%d%> is not supported by this target",
13139 : 0 : int_n_data[declspecs->int_n_idx].bitsize);
13140 : 0 : explicit_intN = false;
13141 : : }
13142 : : /* Don't pedwarn if the alternate "__intN__" form has been used instead
13143 : : of "__intN". */
13144 : 861381 : else if (!int_n_alt && pedantic)
13145 : 4784 : pedwarn (declspecs->locations[ds_type_spec], OPT_Wpedantic,
13146 : : "ISO C++ does not support %<__int%d%> for %qs",
13147 : 4784 : int_n_data[declspecs->int_n_idx].bitsize, name);
13148 : : }
13149 : :
13150 : : /* Now process the modifiers that were specified
13151 : : and check for invalid combinations. */
13152 : :
13153 : : /* Long double is a special combination. */
13154 : 864906289 : if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
13155 : : {
13156 : 8605930 : long_p = false;
13157 : 8605930 : type = cp_build_qualified_type (long_double_type_node,
13158 : : cp_type_quals (type));
13159 : : }
13160 : :
13161 : : /* Check all other uses of type modifiers. */
13162 : :
13163 : 864906289 : if (unsigned_p || signed_p || long_p || short_p)
13164 : : {
13165 : 18103567 : location_t loc;
13166 : 18103567 : const char *key;
13167 : 18103567 : if (unsigned_p)
13168 : : {
13169 : 12179464 : key = "unsigned";
13170 : 12179464 : loc = declspecs->locations[ds_unsigned];
13171 : : }
13172 : 5924103 : else if (signed_p)
13173 : : {
13174 : 1006146 : key = "signed";
13175 : 1006146 : loc = declspecs->locations[ds_signed];
13176 : : }
13177 : 4917957 : else if (longlong)
13178 : : {
13179 : 1580118 : key = "long long";
13180 : 1580118 : loc = declspecs->locations[ds_long_long];
13181 : : }
13182 : 3337839 : else if (long_p)
13183 : : {
13184 : 2854255 : key = "long";
13185 : 2854255 : loc = declspecs->locations[ds_long];
13186 : : }
13187 : : else /* if (short_p) */
13188 : : {
13189 : 483584 : key = "short";
13190 : 483584 : loc = declspecs->locations[ds_short];
13191 : : }
13192 : :
13193 : 18103567 : int ok = 0;
13194 : :
13195 : 18103567 : if (signed_p && unsigned_p)
13196 : 54 : complain_about_incompatible_declspecs
13197 : 54 : ("signed", declspecs->locations[ds_signed],
13198 : : "unsigned", declspecs->locations[ds_unsigned]);
13199 : 18103513 : else if (long_p && short_p)
13200 : 12 : complain_about_incompatible_declspecs
13201 : 12 : ("long", declspecs->locations[ds_long],
13202 : : "short", declspecs->locations[ds_short]);
13203 : 18103501 : else if (TREE_CODE (type) != INTEGER_TYPE
13204 : 18103488 : || type == char8_type_node
13205 : 18103464 : || type == char16_type_node
13206 : 18103440 : || type == char32_type_node
13207 : 18103416 : || ((long_p || short_p)
13208 : 9770234 : && (explicit_char || explicit_intN)))
13209 : 418 : error_at (loc, "%qs specified with %qT", key, type);
13210 : 18103083 : else if (!explicit_int && !defaulted_int
13211 : 18103083 : && !explicit_char && !explicit_intN)
13212 : : {
13213 : 30 : if (typedef_decl)
13214 : : {
13215 : 27 : pedwarn (loc, OPT_Wpedantic,
13216 : : "%qs specified with typedef-name %qD",
13217 : : key, typedef_decl);
13218 : 27 : ok = !flag_pedantic_errors;
13219 : : /* PR108099: __int128_t comes from c_common_nodes_and_builtins,
13220 : : and is not built as a typedef. */
13221 : 27 : if (is_typedef_decl (typedef_decl))
13222 : 18 : type = DECL_ORIGINAL_TYPE (typedef_decl);
13223 : : }
13224 : 3 : else if (declspecs->decltype_p)
13225 : 0 : error_at (loc, "%qs specified with %<decltype%>", key);
13226 : : else
13227 : 3 : error_at (loc, "%qs specified with %<typeof%>", key);
13228 : : }
13229 : : else
13230 : : ok = 1;
13231 : :
13232 : : /* Discard the type modifiers if they are invalid. */
13233 : 514 : if (! ok)
13234 : : {
13235 : : unsigned_p = false;
13236 : : signed_p = false;
13237 : : long_p = false;
13238 : : short_p = false;
13239 : : longlong = 0;
13240 : : }
13241 : : }
13242 : :
13243 : : /* Decide whether an integer type is signed or not.
13244 : : Optionally treat bitfields as signed by default. */
13245 : 864905799 : if (unsigned_p
13246 : : /* [class.bit]
13247 : :
13248 : : It is implementation-defined whether a plain (neither
13249 : : explicitly signed or unsigned) char, short, int, or long
13250 : : bit-field is signed or unsigned.
13251 : :
13252 : : Naturally, we extend this to long long as well. Note that
13253 : : this does not include wchar_t. */
13254 : 864906289 : || (bitfield && !flag_signed_bitfields
13255 : 18 : && !signed_p
13256 : : /* A typedef for plain `int' without `signed' can be
13257 : : controlled just like plain `int', but a typedef for
13258 : : `signed int' cannot be so controlled. */
13259 : 18 : && !(typedef_decl
13260 : 18 : && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
13261 : 13 : && TREE_CODE (type) == INTEGER_TYPE
13262 : 10 : && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
13263 : : {
13264 : 12179249 : if (explicit_intN)
13265 : 403440 : type = int_n_trees[declspecs->int_n_idx].unsigned_type;
13266 : 11775809 : else if (longlong)
13267 : 1397936 : type = long_long_unsigned_type_node;
13268 : 10377873 : else if (long_p)
13269 : 2063257 : type = long_unsigned_type_node;
13270 : 8314616 : else if (short_p)
13271 : 1161134 : type = short_unsigned_type_node;
13272 : 7153482 : else if (type == char_type_node)
13273 : 1421913 : type = unsigned_char_type_node;
13274 : 5731569 : else if (typedef_decl)
13275 : 25 : type = c_common_unsigned_type (type);
13276 : : else
13277 : 5731544 : type = unsigned_type_node;
13278 : : }
13279 : 852727040 : else if (signed_p && type == char_type_node)
13280 : 631159 : type = signed_char_type_node;
13281 : 852095881 : else if (explicit_intN)
13282 : 457941 : type = int_n_trees[declspecs->int_n_idx].signed_type;
13283 : 851637940 : else if (longlong)
13284 : 1649248 : type = long_long_integer_type_node;
13285 : 849988692 : else if (long_p)
13286 : 2931916 : type = long_integer_type_node;
13287 : 847056776 : else if (short_p)
13288 : 566410 : type = short_integer_type_node;
13289 : 846490366 : else if (signed_p && typedef_decl)
13290 : 9 : type = c_common_signed_type (type);
13291 : :
13292 : 864906289 : if (decl_spec_seq_has_spec_p (declspecs, ds_complex))
13293 : : {
13294 : 1318781 : if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
13295 : 3 : error_at (declspecs->locations[ds_complex],
13296 : : "complex invalid for %qs", name);
13297 : : /* If a modifier is specified, the resulting complex is the complex
13298 : : form of TYPE. E.g, "complex short" is "complex short int". */
13299 : 1318778 : else if (type == integer_type_node)
13300 : 163 : type = complex_integer_type_node;
13301 : 1318615 : else if (type == float_type_node)
13302 : 347343 : type = complex_float_type_node;
13303 : 971272 : else if (type == double_type_node)
13304 : 347882 : type = complex_double_type_node;
13305 : 623390 : else if (type == long_double_type_node)
13306 : 347408 : type = complex_long_double_type_node;
13307 : : else
13308 : 275982 : type = build_complex_type (type);
13309 : : }
13310 : :
13311 : : /* If we're using the injected-class-name to form a compound type or a
13312 : : declaration, replace it with the underlying class so we don't get
13313 : : redundant typedefs in the debug output. But if we are returning the
13314 : : type unchanged, leave it alone so that it's available to
13315 : : maybe_get_template_decl_from_type_decl. */
13316 : 172435607 : if (CLASS_TYPE_P (type)
13317 : 172387966 : && DECL_SELF_REFERENCE_P (TYPE_NAME (type))
13318 : 27249655 : && type == TREE_TYPE (TYPE_NAME (type))
13319 : 892155944 : && (declarator || type_quals))
13320 : 26232149 : type = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
13321 : :
13322 : 864906289 : type_quals |= cp_type_quals (type);
13323 : 1729812578 : type = cp_build_qualified_type
13324 : 1729812578 : (type, type_quals, ((((typedef_decl && !DECL_ARTIFICIAL (typedef_decl))
13325 : 699833889 : || declspecs->decltype_p)
13326 : : ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
13327 : : /* We might have ignored or rejected some of the qualifiers. */
13328 : 864906289 : type_quals = cp_type_quals (type);
13329 : :
13330 : 850188557 : if (cxx_dialect >= cxx17 && type && is_auto (type)
13331 : 11699244 : && innermost_code != cdk_function
13332 : : /* Placeholder in parm gets a better error below. */
13333 : 7210804 : && !(decl_context == PARM || decl_context == CATCHPARM)
13334 : 872114237 : && id_declarator && declarator != id_declarator)
13335 : 891864 : if (tree tmpl = CLASS_PLACEHOLDER_TEMPLATE (type))
13336 : : {
13337 : 16 : auto_diagnostic_group g;
13338 : 16 : gcc_rich_location richloc (typespec_loc);
13339 : 16 : richloc.add_fixit_insert_after ("<>");
13340 : 16 : error_at (&richloc, "missing template argument list after %qE; "
13341 : : "for deduction, template placeholder must be followed "
13342 : : "by a simple declarator-id", tmpl);
13343 : 16 : inform (DECL_SOURCE_LOCATION (tmpl), "%qD declared here", tmpl);
13344 : 16 : type = error_mark_node;
13345 : 16 : }
13346 : :
13347 : 864906289 : staticp = 0;
13348 : 864906289 : inlinep = decl_spec_seq_has_spec_p (declspecs, ds_inline);
13349 : 864906289 : virtualp = decl_spec_seq_has_spec_p (declspecs, ds_virtual);
13350 : 864906289 : explicitp = decl_spec_seq_has_spec_p (declspecs, ds_explicit);
13351 : :
13352 : 864906289 : storage_class = declspecs->storage_class;
13353 : 864906289 : if (storage_class == sc_static)
13354 : 17929924 : staticp = 1 + (decl_context == FIELD);
13355 : 846976365 : else if (decl_context == FIELD && sfk == sfk_deduction_guide)
13356 : : /* Treat class-scope deduction guides as static member functions
13357 : : so that they get a FUNCTION_TYPE instead of a METHOD_TYPE. */
13358 : 17617724 : staticp = 2;
13359 : :
13360 : 864906289 : if (virtualp)
13361 : : {
13362 : 3895711 : if (staticp == 2)
13363 : : {
13364 : 21 : gcc_rich_location richloc (declspecs->locations[ds_virtual]);
13365 : 21 : richloc.add_range (declspecs->locations[ds_storage_class]);
13366 : 21 : error_at (&richloc, "member %qD cannot be declared both %<virtual%> "
13367 : : "and %<static%>", dname);
13368 : 21 : storage_class = sc_none;
13369 : 21 : staticp = 0;
13370 : 21 : }
13371 : 3895711 : if (constexpr_p && pedantic && cxx_dialect < cxx20)
13372 : : {
13373 : 6 : gcc_rich_location richloc (declspecs->locations[ds_virtual]);
13374 : 6 : richloc.add_range (declspecs->locations[ds_constexpr]);
13375 : 6 : pedwarn (&richloc, OPT_Wc__20_extensions, "member %qD can be "
13376 : : "declared both %<virtual%> and %<constexpr%> only in "
13377 : : "%<-std=c++20%> or %<-std=gnu++20%>", dname);
13378 : 6 : }
13379 : : }
13380 : 864906289 : friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
13381 : :
13382 : : /* Issue errors about use of storage classes for parameters. */
13383 : 864906289 : if (decl_context == PARM)
13384 : : {
13385 : 262090245 : if (typedef_p)
13386 : : {
13387 : 24 : error_at (declspecs->locations[ds_typedef],
13388 : : "typedef declaration invalid in parameter declaration");
13389 : 24 : return error_mark_node;
13390 : : }
13391 : 262090221 : else if (template_parm_flag && storage_class != sc_none)
13392 : : {
13393 : 16 : error_at (min_location (declspecs->locations[ds_thread],
13394 : : declspecs->locations[ds_storage_class]),
13395 : : "storage class specified for template parameter %qs",
13396 : : name);
13397 : 16 : return error_mark_node;
13398 : : }
13399 : 262090205 : else if (storage_class == sc_static
13400 : 262090205 : || storage_class == sc_extern
13401 : 262090202 : || thread_p)
13402 : : {
13403 : 9 : error_at (min_location (declspecs->locations[ds_thread],
13404 : : declspecs->locations[ds_storage_class]),
13405 : : "storage class specified for parameter %qs", name);
13406 : 9 : return error_mark_node;
13407 : : }
13408 : :
13409 : : /* Function parameters cannot be concept. */
13410 : 262090196 : if (concept_p)
13411 : : {
13412 : 9 : error_at (declspecs->locations[ds_concept],
13413 : : "a parameter cannot be declared %qs", "concept");
13414 : 9 : concept_p = 0;
13415 : 9 : constexpr_p = 0;
13416 : : }
13417 : : /* Function parameters cannot be constexpr. If we saw one, moan
13418 : : and pretend it wasn't there. */
13419 : 262090187 : else if (constexpr_p)
13420 : : {
13421 : 9 : error_at (declspecs->locations[ds_constexpr],
13422 : : "a parameter cannot be declared %qs", "constexpr");
13423 : 9 : constexpr_p = 0;
13424 : : }
13425 : 262090196 : if (constinit_p)
13426 : : {
13427 : 6 : error_at (declspecs->locations[ds_constinit],
13428 : : "a parameter cannot be declared %qs", "constinit");
13429 : 6 : constinit_p = 0;
13430 : : }
13431 : 262090196 : if (consteval_p)
13432 : : {
13433 : 3 : error_at (declspecs->locations[ds_consteval],
13434 : : "a parameter cannot be declared %qs", "consteval");
13435 : 3 : consteval_p = 0;
13436 : : }
13437 : : }
13438 : :
13439 : : /* Give error if `virtual' is used outside of class declaration. */
13440 : 864906240 : if (virtualp
13441 : 3895711 : && (current_class_name == NULL_TREE || decl_context != FIELD))
13442 : : {
13443 : 22 : error_at (declspecs->locations[ds_virtual],
13444 : : "%<virtual%> outside class declaration");
13445 : 22 : virtualp = 0;
13446 : : }
13447 : :
13448 : 864906240 : if (innermost_code == cdk_decomp)
13449 : : {
13450 : 137744 : location_t loc = (declarator->kind == cdk_reference
13451 : 68872 : ? declarator->declarator->id_loc : declarator->id_loc);
13452 : 68872 : if (inlinep)
13453 : 1 : error_at (declspecs->locations[ds_inline],
13454 : : "structured binding declaration cannot be %qs", "inline");
13455 : 68872 : if (typedef_p)
13456 : 1 : error_at (declspecs->locations[ds_typedef],
13457 : : "structured binding declaration cannot be %qs", "typedef");
13458 : 68872 : if (constexpr_p && !concept_p)
13459 : 4 : error_at (declspecs->locations[ds_constexpr], "structured "
13460 : : "binding declaration cannot be %qs", "constexpr");
13461 : 68872 : if (consteval_p)
13462 : 3 : error_at (declspecs->locations[ds_consteval], "structured "
13463 : : "binding declaration cannot be %qs", "consteval");
13464 : 68872 : if (thread_p && cxx_dialect < cxx20)
13465 : 14 : pedwarn (declspecs->locations[ds_thread], OPT_Wc__20_extensions,
13466 : : "structured binding declaration can be %qs only in "
13467 : : "%<-std=c++20%> or %<-std=gnu++20%>",
13468 : 14 : declspecs->gnu_thread_keyword_p
13469 : : ? "__thread" : "thread_local");
13470 : 68872 : if (concept_p)
13471 : 0 : error_at (declspecs->locations[ds_concept],
13472 : : "structured binding declaration cannot be %qs", "concept");
13473 : : /* [dcl.struct.bind] "A cv that includes volatile is deprecated." */
13474 : 68872 : if (type_quals & TYPE_QUAL_VOLATILE)
13475 : 26 : warning_at (declspecs->locations[ds_volatile], OPT_Wvolatile,
13476 : : "%<volatile%>-qualified structured binding is deprecated");
13477 : 68872 : switch (storage_class)
13478 : : {
13479 : : case sc_none:
13480 : : break;
13481 : 0 : case sc_register:
13482 : 0 : error_at (loc, "structured binding declaration cannot be %qs",
13483 : : "register");
13484 : 0 : break;
13485 : 85 : case sc_static:
13486 : 85 : if (cxx_dialect < cxx20)
13487 : 81 : pedwarn (loc, OPT_Wc__20_extensions,
13488 : : "structured binding declaration can be %qs only in "
13489 : : "%<-std=c++20%> or %<-std=gnu++20%>", "static");
13490 : : break;
13491 : 1 : case sc_extern:
13492 : 1 : error_at (loc, "structured binding declaration cannot be %qs",
13493 : : "extern");
13494 : 1 : break;
13495 : 0 : case sc_mutable:
13496 : 0 : error_at (loc, "structured binding declaration cannot be %qs",
13497 : : "mutable");
13498 : 0 : break;
13499 : 0 : case sc_auto:
13500 : 0 : error_at (loc, "structured binding declaration cannot be "
13501 : : "C++98 %<auto%>");
13502 : 0 : break;
13503 : 0 : default:
13504 : 0 : gcc_unreachable ();
13505 : : }
13506 : 68872 : if (TREE_CODE (type) != TEMPLATE_TYPE_PARM
13507 : 68872 : || TYPE_IDENTIFIER (type) != auto_identifier)
13508 : : {
13509 : 3 : if (type != error_mark_node)
13510 : : {
13511 : 3 : auto_diagnostic_group d;
13512 : 3 : error_at (loc, "structured binding declaration cannot have "
13513 : : "type %qT", type);
13514 : 3 : inform (loc,
13515 : : "type must be cv-qualified %<auto%> or reference to "
13516 : : "cv-qualified %<auto%>");
13517 : 3 : }
13518 : 3 : type = build_qualified_type (make_auto (), type_quals);
13519 : 3 : declspecs->type = type;
13520 : : }
13521 : 68869 : else if (PLACEHOLDER_TYPE_CONSTRAINTS_INFO (type))
13522 : 51 : pedwarn (loc, OPT_Wpedantic,
13523 : : "structured binding declaration cannot have constrained "
13524 : : "%<auto%> type %qT", type);
13525 : 68872 : inlinep = 0;
13526 : 68872 : typedef_p = 0;
13527 : 68872 : constexpr_p = 0;
13528 : 68872 : consteval_p = 0;
13529 : 68872 : concept_p = 0;
13530 : 68872 : if (storage_class != sc_static)
13531 : : {
13532 : 68787 : storage_class = sc_none;
13533 : 68787 : declspecs->storage_class = sc_none;
13534 : : }
13535 : : }
13536 : :
13537 : : /* Static anonymous unions are dealt with here. */
13538 : 864906240 : if (staticp && decl_context == TYPENAME
13539 : 0 : && declspecs->type
13540 : 864906240 : && ANON_AGGR_TYPE_P (declspecs->type))
13541 : : decl_context = FIELD;
13542 : :
13543 : : /* Warn about storage classes that are invalid for certain
13544 : : kinds of declarations (parameters, typenames, etc.). */
13545 : 864906240 : if (thread_p
13546 : 20159 : && ((storage_class
13547 : 20159 : && storage_class != sc_extern
13548 : 490 : && storage_class != sc_static)
13549 : 20148 : || typedef_p))
13550 : : {
13551 : 17 : location_t loc
13552 : 17 : = min_location (declspecs->locations[ds_thread],
13553 : : declspecs->locations[ds_storage_class]);
13554 : 17 : error_at (loc, "multiple storage classes in declaration of %qs", name);
13555 : 17 : thread_p = false;
13556 : : }
13557 : 864906240 : if (decl_context != NORMAL
13558 : 718703378 : && ((storage_class != sc_none
13559 : 718703378 : && storage_class != sc_mutable)
13560 : 701085666 : || thread_p))
13561 : : {
13562 : 17617715 : if ((decl_context == PARM || decl_context == CATCHPARM)
13563 : 36 : && (storage_class == sc_register
13564 : 36 : || storage_class == sc_auto))
13565 : : ;
13566 : 17617679 : else if (typedef_p)
13567 : : ;
13568 : 17617679 : else if (decl_context == FIELD
13569 : : /* C++ allows static class elements. */
13570 : 17617679 : && storage_class == sc_static)
13571 : : /* C++ also allows inlines and signed and unsigned elements,
13572 : : but in those cases we don't come in here. */
13573 : : ;
13574 : : else
13575 : : {
13576 : 15 : location_t loc
13577 : 15 : = min_location (declspecs->locations[ds_thread],
13578 : : declspecs->locations[ds_storage_class]);
13579 : 15 : if (decl_context == FIELD)
13580 : 15 : error_at (loc, "storage class specified for %qs", name);
13581 : 0 : else if (decl_context == PARM || decl_context == CATCHPARM)
13582 : 0 : error_at (loc, "storage class specified for parameter %qs", name);
13583 : : else
13584 : 0 : error_at (loc, "storage class specified for typename");
13585 : 15 : if (storage_class == sc_register
13586 : 15 : || storage_class == sc_auto
13587 : 15 : || storage_class == sc_extern
13588 : 3 : || thread_p)
13589 : 15 : storage_class = sc_none;
13590 : : }
13591 : : }
13592 : 847288525 : else if (storage_class == sc_extern && funcdef_flag
13593 : 847288525 : && ! toplevel_bindings_p ())
13594 : 0 : error ("nested function %qs declared %<extern%>", name);
13595 : 847288525 : else if (toplevel_bindings_p ())
13596 : : {
13597 : 390442807 : if (storage_class == sc_auto)
13598 : 2 : error_at (declspecs->locations[ds_storage_class],
13599 : : "top-level declaration of %qs specifies %<auto%>", name);
13600 : : }
13601 : 456845718 : else if (thread_p
13602 : 456845718 : && storage_class != sc_extern
13603 : 95 : && storage_class != sc_static)
13604 : : {
13605 : 63 : if (declspecs->gnu_thread_keyword_p)
13606 : 3 : pedwarn (declspecs->locations[ds_thread],
13607 : : 0, "function-scope %qs implicitly auto and "
13608 : : "declared %<__thread%>", name);
13609 : :
13610 : : /* When thread_local is applied to a variable of block scope the
13611 : : storage-class-specifier static is implied if it does not appear
13612 : : explicitly. */
13613 : 63 : storage_class = declspecs->storage_class = sc_static;
13614 : 63 : staticp = 1;
13615 : : }
13616 : :
13617 : 864906240 : if (storage_class && friendp)
13618 : : {
13619 : 12 : error_at (min_location (declspecs->locations[ds_thread],
13620 : : declspecs->locations[ds_storage_class]),
13621 : : "storage class specifiers invalid in friend function "
13622 : : "declarations");
13623 : 12 : storage_class = sc_none;
13624 : 12 : staticp = 0;
13625 : : }
13626 : :
13627 : 864906240 : if (!id_declarator)
13628 : : unqualified_id = NULL_TREE;
13629 : : else
13630 : : {
13631 : 503336083 : unqualified_id = id_declarator->u.id.unqualified_name;
13632 : 503336083 : switch (TREE_CODE (unqualified_id))
13633 : : {
13634 : 2981294 : case BIT_NOT_EXPR:
13635 : 2981294 : unqualified_id = TREE_OPERAND (unqualified_id, 0);
13636 : 2981294 : if (TYPE_P (unqualified_id))
13637 : 2981291 : unqualified_id = constructor_name (unqualified_id);
13638 : : break;
13639 : :
13640 : : case IDENTIFIER_NODE:
13641 : : case TEMPLATE_ID_EXPR:
13642 : : break;
13643 : :
13644 : 0 : default:
13645 : 0 : gcc_unreachable ();
13646 : : }
13647 : : }
13648 : :
13649 : 864906240 : if (declspecs->std_attributes
13650 : 864906240 : && !diagnose_misapplied_contracts (declspecs->std_attributes))
13651 : : {
13652 : 489 : location_t attr_loc = declspecs->locations[ds_std_attribute];
13653 : 489 : auto_diagnostic_group d;
13654 : 489 : if (any_nonignored_attribute_p (declspecs->std_attributes)
13655 : 489 : && warning_at (attr_loc, OPT_Wattributes, "attribute ignored"))
13656 : 486 : inform (attr_loc, "an attribute that appertains to a type-specifier "
13657 : : "is ignored");
13658 : 489 : }
13659 : :
13660 : 864906240 : if (attrlist)
13661 : 853305772 : diagnose_misapplied_contracts (*attrlist);
13662 : :
13663 : : /* Skip over build_memfn_type when a FUNCTION_DECL is an xobj memfn. */
13664 : : bool is_xobj_member_function = false;
13665 : : /* Determine the type of the entity declared by recurring on the
13666 : : declarator. */
13667 : 1203709028 : for (; declarator; declarator = declarator->declarator)
13668 : : {
13669 : 842207765 : const cp_declarator *inner_declarator;
13670 : 842207765 : tree attrs;
13671 : :
13672 : 842207765 : if (type == error_mark_node)
13673 : 593 : return error_mark_node;
13674 : :
13675 : 842207439 : attrs = declarator->attributes;
13676 : 842207439 : if (attrs)
13677 : : {
13678 : 12641 : int attr_flags;
13679 : :
13680 : 12641 : attr_flags = 0;
13681 : 12641 : if (declarator->kind == cdk_id)
13682 : 11966 : attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
13683 : 12641 : if (declarator->kind == cdk_function)
13684 : 655 : attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
13685 : 12641 : if (declarator->kind == cdk_array)
13686 : 2 : attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
13687 : 12641 : tree late_attrs = NULL_TREE;
13688 : 12641 : if (decl_context != PARM && decl_context != TYPENAME)
13689 : : /* Assume that any attributes that get applied late to
13690 : : templates will DTRT when applied to the declaration
13691 : : as a whole. */
13692 : 12632 : late_attrs = splice_template_attributes (&attrs, type);
13693 : 12641 : returned_attrs = decl_attributes (&type,
13694 : : attr_chainon (returned_attrs,
13695 : : attrs),
13696 : : attr_flags);
13697 : 12641 : returned_attrs = attr_chainon (late_attrs, returned_attrs);
13698 : : }
13699 : :
13700 : 842207439 : inner_declarator = declarator->declarator;
13701 : :
13702 : : /* Check that contracts aren't misapplied. */
13703 : 842207439 : if (tree contract_attr = find_contract (declarator->std_attributes))
13704 : 477 : if (declarator->kind != cdk_function
13705 : 472 : || innermost_code != cdk_function)
13706 : 7 : diagnose_misapplied_contracts (contract_attr);
13707 : :
13708 : : /* We don't want to warn in parameter context because we don't
13709 : : yet know if the parse will succeed, and this might turn out
13710 : : to be a constructor call. */
13711 : 842207439 : if (decl_context != PARM
13712 : 842207439 : && decl_context != TYPENAME
13713 : 482245995 : && !typedef_p
13714 : 439880264 : && declarator->parenthesized != UNKNOWN_LOCATION
13715 : : /* If the type is class-like and the inner name used a
13716 : : global namespace qualifier, we need the parens.
13717 : : Unfortunately all we can tell is whether a qualified name
13718 : : was used or not. */
13719 : 842207620 : && !(inner_declarator
13720 : 126 : && inner_declarator->kind == cdk_id
13721 : 108 : && inner_declarator->u.id.qualifying_scope
13722 : 18 : && (MAYBE_CLASS_TYPE_P (type)
13723 : 12 : || TREE_CODE (type) == ENUMERAL_TYPE)))
13724 : : {
13725 : 169 : auto_diagnostic_group d;
13726 : 169 : if (warning_at (declarator->parenthesized, OPT_Wparentheses,
13727 : : "unnecessary parentheses in declaration of %qs",
13728 : : name))
13729 : : {
13730 : 42 : gcc_rich_location iloc (declarator->parenthesized);
13731 : 42 : iloc.add_fixit_remove (get_start (declarator->parenthesized));
13732 : 42 : iloc.add_fixit_remove (get_finish (declarator->parenthesized));
13733 : 42 : inform (&iloc, "remove parentheses");
13734 : 42 : }
13735 : 169 : }
13736 : 842207439 : if (declarator->kind == cdk_id || declarator->kind == cdk_decomp)
13737 : : break;
13738 : :
13739 : 338803055 : switch (declarator->kind)
13740 : : {
13741 : 2965283 : case cdk_array:
13742 : 5930566 : type = create_array_type_for_decl (dname, type,
13743 : 2965283 : declarator->u.array.bounds,
13744 : 2965283 : declarator->id_loc);
13745 : 2965283 : if (!valid_array_size_p (dname
13746 : : ? declarator->id_loc : input_location,
13747 : : type, dname))
13748 : 267 : type = error_mark_node;
13749 : :
13750 : 2965283 : if (declarator->std_attributes)
13751 : : /* [dcl.array]/1:
13752 : :
13753 : : The optional attribute-specifier-seq appertains to the
13754 : : array type. */
13755 : 129 : decl_attributes (&type, declarator->std_attributes, 0);
13756 : : break;
13757 : :
13758 : 165530263 : case cdk_function:
13759 : 165530263 : {
13760 : 165530263 : tree arg_types;
13761 : 165530263 : int funcdecl_p;
13762 : :
13763 : : /* Declaring a function type. */
13764 : :
13765 : : /* Pick up type qualifiers which should be applied to `this'. */
13766 : 165530263 : memfn_quals = declarator->u.function.qualifiers;
13767 : : /* Pick up virt-specifiers. */
13768 : 165530263 : virt_specifiers = declarator->u.function.virt_specifiers;
13769 : : /* And ref-qualifier, too */
13770 : 165530263 : rqual = declarator->u.function.ref_qualifier;
13771 : : /* And tx-qualifier. */
13772 : 165530263 : tree tx_qual = declarator->u.function.tx_qualifier;
13773 : : /* Pick up the exception specifications. */
13774 : 165530263 : raises = declarator->u.function.exception_specification;
13775 : : /* If the exception-specification is ill-formed, let's pretend
13776 : : there wasn't one. */
13777 : 165530263 : if (raises == error_mark_node)
13778 : 9 : raises = NULL_TREE;
13779 : :
13780 : 331060526 : auto find_xobj_parm = [](tree parm_list)
13781 : : {
13782 : : /* There is no need to iterate over the list,
13783 : : only the first parm can be a valid xobj parm. */
13784 : 330813547 : if (!parm_list || TREE_PURPOSE (parm_list) != this_identifier)
13785 : : return NULL_TREE;
13786 : : /* If we make it here, we are looking at an xobj parm.
13787 : :
13788 : : Non-null 'purpose' usually means the parm has a default
13789 : : argument, we don't want to violate this assumption. */
13790 : 17399 : TREE_PURPOSE (parm_list) = NULL_TREE;
13791 : 17399 : return TREE_VALUE (parm_list);
13792 : : };
13793 : :
13794 : 165530263 : tree xobj_parm
13795 : 165530263 : = find_xobj_parm (declarator->u.function.parameters);
13796 : 165530263 : is_xobj_member_function = xobj_parm;
13797 : :
13798 : 165530263 : if (xobj_parm && cxx_dialect < cxx23)
13799 : 24 : pedwarn (DECL_SOURCE_LOCATION (xobj_parm), OPT_Wc__23_extensions,
13800 : : "explicit object member function only available "
13801 : : "with %<-std=c++23%> or %<-std=gnu++23%>");
13802 : :
13803 : 165530263 : if (xobj_parm && decl_context == TYPENAME)
13804 : : {
13805 : : /* We inform in every case, just differently depending on what
13806 : : case it is. */
13807 : 6 : auto_diagnostic_group d;
13808 : 6 : bool ptr_type = true;
13809 : : /* If declarator->kind is cdk_function and we are at the end of
13810 : : the declarator chain, we are looking at a function type. */
13811 : 6 : if (!declarator->declarator)
13812 : : {
13813 : 2 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
13814 : : "a function type cannot "
13815 : : "have an explicit object parameter");
13816 : 2 : ptr_type = false;
13817 : : }
13818 : 4 : else if (declarator->declarator->kind == cdk_pointer)
13819 : 2 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
13820 : : "a pointer to function type cannot "
13821 : : "have an explicit object parameter");
13822 : 2 : else if (declarator->declarator->kind == cdk_ptrmem)
13823 : 2 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
13824 : : "a pointer to member function type "
13825 : : "cannot have an explicit object parameter");
13826 : : else
13827 : 0 : gcc_unreachable ();
13828 : :
13829 : : /* The locations being used here are probably not correct. */
13830 : 4 : if (ptr_type)
13831 : 4 : inform (DECL_SOURCE_LOCATION (xobj_parm),
13832 : : "the type of a pointer to explicit object member "
13833 : : "function is a regular pointer to function type");
13834 : : else
13835 : 2 : inform (DECL_SOURCE_LOCATION (xobj_parm),
13836 : : "the type of an explicit object "
13837 : : "member function is a regular function type");
13838 : : /* Ideally we should synthesize the correct syntax
13839 : : for the user, perhaps this could be added later. */
13840 : 6 : }
13841 : : /* Since a valid xobj parm has its purpose cleared in find_xobj_parm
13842 : : the first parm node will never erroneously be detected here. */
13843 : 165530263 : {
13844 : 165530263 : auto_diagnostic_group d;
13845 : 165530263 : bool bad_xobj_parm_encountered = false;
13846 : 165530263 : for (tree parm = declarator->u.function.parameters;
13847 : 416886334 : parm && parm != void_list_node;
13848 : 251356071 : parm = TREE_CHAIN (parm))
13849 : : {
13850 : 251356071 : if (TREE_PURPOSE (parm) != this_identifier)
13851 : 251356065 : continue;
13852 : 6 : bad_xobj_parm_encountered = true;
13853 : 6 : TREE_PURPOSE (parm) = NULL_TREE;
13854 : 6 : gcc_rich_location bad_xobj_parm
13855 : 6 : (DECL_SOURCE_LOCATION (TREE_VALUE (parm)));
13856 : 6 : error_at (&bad_xobj_parm,
13857 : : "only the first parameter of a member function "
13858 : : "can be declared as an explicit object parameter");
13859 : 6 : }
13860 : 165530263 : if (bad_xobj_parm_encountered && xobj_parm)
13861 : 0 : inform (DECL_SOURCE_LOCATION (xobj_parm),
13862 : : "valid explicit object parameter declared here");
13863 : 165530263 : }
13864 : :
13865 : 165530263 : if (reqs)
13866 : 3 : error_at (location_of (reqs), "requires-clause on return type");
13867 : 165530263 : reqs = declarator->u.function.requires_clause;
13868 : :
13869 : : /* Say it's a definition only for the CALL_EXPR
13870 : : closest to the identifier. */
13871 : 165530263 : funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
13872 : :
13873 : : /* Handle a late-specified return type. */
13874 : 165530263 : tree late_return_type = declarator->u.function.late_return_type;
13875 : 165530263 : if (tree auto_node = type_uses_auto (type))
13876 : : {
13877 : 4497885 : if (!late_return_type)
13878 : : {
13879 : 1781385 : if (!funcdecl_p)
13880 : : /* auto (*fp)() = f; is OK. */;
13881 : 1781353 : else if (current_class_type
13882 : 3260174 : && LAMBDA_TYPE_P (current_class_type))
13883 : : /* OK for C++11 lambdas. */;
13884 : 1318838 : else if (cxx_dialect < cxx14)
13885 : : {
13886 : 7 : auto_diagnostic_group d;
13887 : 7 : error_at (typespec_loc, "%qs function uses "
13888 : : "%<auto%> type specifier without "
13889 : : "trailing return type", name);
13890 : 7 : inform (typespec_loc,
13891 : : "deduced return type only available "
13892 : : "with %<-std=c++14%> or %<-std=gnu++14%>");
13893 : 7 : }
13894 : 1318831 : else if (virtualp)
13895 : : {
13896 : 6 : error_at (typespec_loc, "virtual function "
13897 : : "cannot have deduced return type");
13898 : 6 : virtualp = false;
13899 : : }
13900 : : }
13901 : 2716500 : else if (!is_auto (type) && sfk != sfk_conversion)
13902 : : {
13903 : 15 : error_at (typespec_loc, "%qs function with trailing "
13904 : : "return type has %qT as its type rather "
13905 : : "than plain %<auto%>", name, type);
13906 : 264 : return error_mark_node;
13907 : : }
13908 : 2716485 : else if (is_auto (type) && AUTO_IS_DECLTYPE (type))
13909 : : {
13910 : 9 : if (funcdecl_p)
13911 : 3 : error_at (typespec_loc,
13912 : : "%qs function with trailing return type "
13913 : : "has %<decltype(auto)%> as its type "
13914 : : "rather than plain %<auto%>", name);
13915 : : else
13916 : 6 : error_at (typespec_loc,
13917 : : "invalid use of %<decltype(auto)%>");
13918 : 9 : return error_mark_node;
13919 : : }
13920 : 4497861 : tree tmpl = CLASS_PLACEHOLDER_TEMPLATE (auto_node);
13921 : 4497861 : if (!tmpl)
13922 : 3601060 : if (tree late_auto = type_uses_auto (late_return_type))
13923 : 14865 : tmpl = CLASS_PLACEHOLDER_TEMPLATE (late_auto);
13924 : 3601060 : if (tmpl)
13925 : : {
13926 : 896805 : if (!funcdecl_p || !dguide_name_p (unqualified_id))
13927 : : {
13928 : 10 : auto_diagnostic_group g;
13929 : 10 : error_at (typespec_loc, "deduced class "
13930 : : "type %qD in function return type",
13931 : 10 : DECL_NAME (tmpl));
13932 : 10 : inform (DECL_SOURCE_LOCATION (tmpl),
13933 : : "%qD declared here", tmpl);
13934 : 10 : return error_mark_node;
13935 : 10 : }
13936 : 896795 : else if (!late_return_type)
13937 : : {
13938 : 3 : auto_diagnostic_group d;
13939 : 3 : error_at (declarator->id_loc, "deduction guide "
13940 : : "for %qT must have trailing return "
13941 : 3 : "type", TREE_TYPE (tmpl));
13942 : 3 : inform (DECL_SOURCE_LOCATION (tmpl),
13943 : : "%qD declared here", tmpl);
13944 : 3 : return error_mark_node;
13945 : 3 : }
13946 : 896792 : else if (CLASS_TYPE_P (late_return_type)
13947 : 896792 : && CLASSTYPE_TEMPLATE_INFO (late_return_type)
13948 : 1793584 : && (CLASSTYPE_TI_TEMPLATE (late_return_type)
13949 : : == tmpl))
13950 : : /* OK */;
13951 : : else
13952 : 0 : error ("trailing return type %qT of deduction guide "
13953 : : "is not a specialization of %qT",
13954 : 0 : late_return_type, TREE_TYPE (tmpl));
13955 : : }
13956 : : }
13957 : 161032378 : else if (late_return_type
13958 : 161032378 : && sfk != sfk_conversion)
13959 : : {
13960 : 37 : if (late_return_type == error_mark_node)
13961 : : return error_mark_node;
13962 : 37 : if (cxx_dialect < cxx11)
13963 : : /* Not using maybe_warn_cpp0x because this should
13964 : : always be an error. */
13965 : 1 : error_at (typespec_loc,
13966 : : "trailing return type only available "
13967 : : "with %<-std=c++11%> or %<-std=gnu++11%>");
13968 : : else
13969 : 36 : error_at (typespec_loc, "%qs function with trailing "
13970 : : "return type not declared with %<auto%> "
13971 : : "type specifier", name);
13972 : 37 : return error_mark_node;
13973 : : }
13974 : 165530189 : if (late_return_type && sfk == sfk_conversion)
13975 : : {
13976 : 14 : error ("a conversion function cannot have a trailing return type");
13977 : 14 : return error_mark_node;
13978 : : }
13979 : 165530175 : type = splice_late_return_type (type, late_return_type);
13980 : 165530175 : if (type == error_mark_node)
13981 : : return error_mark_node;
13982 : :
13983 : 165530099 : if (late_return_type)
13984 : : {
13985 : 2716388 : late_return_type_p = true;
13986 : 2716388 : type_quals = cp_type_quals (type);
13987 : : }
13988 : :
13989 : 165530099 : if (type_quals != TYPE_UNQUALIFIED)
13990 : : {
13991 : : /* It's wrong, for instance, to issue a -Wignored-qualifiers
13992 : : warning for
13993 : : static_assert(!is_same_v<void(*)(), const void(*)()>);
13994 : : because there the qualifier matters. */
13995 : 12189 : if (funcdecl_p && (SCALAR_TYPE_P (type) || VOID_TYPE_P (type)))
13996 : 229 : warning_at (typespec_loc, OPT_Wignored_qualifiers, "type "
13997 : : "qualifiers ignored on function return type");
13998 : : /* [dcl.fct] "A volatile-qualified return type is
13999 : : deprecated." */
14000 : 12189 : if (type_quals & TYPE_QUAL_VOLATILE)
14001 : 614 : warning_at (typespec_loc, OPT_Wvolatile,
14002 : : "%<volatile%>-qualified return type is "
14003 : : "deprecated");
14004 : :
14005 : : /* We now know that the TYPE_QUALS don't apply to the
14006 : : decl, but to its return type. */
14007 : : type_quals = TYPE_UNQUALIFIED;
14008 : : }
14009 : :
14010 : : /* Error about some types functions can't return. */
14011 : :
14012 : 165530099 : if (TREE_CODE (type) == FUNCTION_TYPE)
14013 : : {
14014 : 30 : error_at (typespec_loc, "%qs declared as function returning "
14015 : : "a function", name);
14016 : 30 : return error_mark_node;
14017 : : }
14018 : 165530069 : if (TREE_CODE (type) == ARRAY_TYPE)
14019 : : {
14020 : 6 : error_at (typespec_loc, "%qs declared as function returning "
14021 : : "an array", name);
14022 : 6 : return error_mark_node;
14023 : : }
14024 : 165530063 : if (constinit_p && funcdecl_p)
14025 : : {
14026 : 15 : error_at (declspecs->locations[ds_constinit],
14027 : : "%<constinit%> on function return type is not "
14028 : : "allowed");
14029 : 15 : return error_mark_node;
14030 : : }
14031 : :
14032 : 165530048 : if (check_decltype_auto (typespec_loc, type))
14033 : 49 : return error_mark_node;
14034 : :
14035 : 165529999 : if (ctype == NULL_TREE
14036 : 165529999 : && decl_context == FIELD
14037 : : && funcdecl_p
14038 : 88591141 : && friendp == 0)
14039 : 84697831 : ctype = current_class_type;
14040 : :
14041 : 165529999 : if (ctype && (sfk == sfk_constructor
14042 : 84697831 : || sfk == sfk_destructor))
14043 : : {
14044 : : /* We are within a class's scope. If our declarator name
14045 : : is the same as the class name, and we are defining
14046 : : a function, then it is a constructor/destructor, and
14047 : : therefore returns a void type. */
14048 : :
14049 : : /* ISO C++ 12.4/2. A destructor may not be declared
14050 : : const or volatile. A destructor may not be static.
14051 : : A destructor may not be declared with ref-qualifier.
14052 : :
14053 : : ISO C++ 12.1. A constructor may not be declared
14054 : : const or volatile. A constructor may not be
14055 : : virtual. A constructor may not be static.
14056 : : A constructor may not be declared with ref-qualifier. */
14057 : 22962231 : if (staticp == 2)
14058 : 9 : error_at (declspecs->locations[ds_storage_class],
14059 : : (flags == DTOR_FLAG)
14060 : : ? G_("destructor cannot be static member "
14061 : : "function")
14062 : : : G_("constructor cannot be static member "
14063 : : "function"));
14064 : 22962231 : if (memfn_quals)
14065 : : {
14066 : 9 : error ((flags == DTOR_FLAG)
14067 : : ? G_("destructors may not be cv-qualified")
14068 : : : G_("constructors may not be cv-qualified"));
14069 : 9 : memfn_quals = TYPE_UNQUALIFIED;
14070 : : }
14071 : :
14072 : 22962231 : if (rqual)
14073 : : {
14074 : 6 : maybe_warn_cpp0x (CPP0X_REF_QUALIFIER);
14075 : 6 : error ((flags == DTOR_FLAG)
14076 : : ? G_("destructors may not be ref-qualified")
14077 : : : G_("constructors may not be ref-qualified"));
14078 : 6 : rqual = REF_QUAL_NONE;
14079 : : }
14080 : :
14081 : 22962231 : if (decl_context == FIELD
14082 : 22962231 : && !member_function_or_else (ctype,
14083 : : current_class_type,
14084 : : flags))
14085 : 0 : return error_mark_node;
14086 : :
14087 : 22962231 : if (flags != DTOR_FLAG)
14088 : : {
14089 : : /* It's a constructor. */
14090 : 20147482 : if (explicitp == 1)
14091 : 4867366 : explicitp = 2;
14092 : 20147482 : if (virtualp)
14093 : : {
14094 : 3 : permerror (declspecs->locations[ds_virtual],
14095 : : "constructors cannot be declared %<virtual%>");
14096 : 3 : virtualp = 0;
14097 : : }
14098 : 20147482 : if (decl_context == FIELD
14099 : 20147482 : && sfk != sfk_constructor)
14100 : 0 : return error_mark_node;
14101 : : }
14102 : 22962231 : if (decl_context == FIELD)
14103 : 22962231 : staticp = 0;
14104 : : }
14105 : 142567768 : else if (friendp)
14106 : : {
14107 : 3602695 : if (virtualp)
14108 : : {
14109 : : /* Cannot be both friend and virtual. */
14110 : 12 : gcc_rich_location richloc (declspecs->locations[ds_virtual]);
14111 : 12 : richloc.add_range (declspecs->locations[ds_friend]);
14112 : 12 : error_at (&richloc, "virtual functions cannot be friends");
14113 : 12 : friendp = 0;
14114 : 12 : }
14115 : 3602695 : if (decl_context == NORMAL)
14116 : 0 : error_at (declarator->id_loc,
14117 : : "friend declaration not in class definition");
14118 : 3602695 : if (current_function_decl && funcdef_flag)
14119 : : {
14120 : 9 : error_at (declarator->id_loc,
14121 : : "cannot define friend function %qs in a local "
14122 : : "class definition", name);
14123 : 9 : friendp = 0;
14124 : : }
14125 : : /* [class.friend]/6: A function can be defined in a friend
14126 : : declaration if the function name is unqualified. */
14127 : 3602695 : if (funcdef_flag && in_namespace)
14128 : : {
14129 : 6 : if (in_namespace == global_namespace)
14130 : 3 : error_at (declarator->id_loc,
14131 : : "friend function definition %qs cannot have "
14132 : : "a name qualified with %<::%>", name);
14133 : : else
14134 : 3 : error_at (declarator->id_loc,
14135 : : "friend function definition %qs cannot have "
14136 : : "a name qualified with %<%D::%>", name,
14137 : : in_namespace);
14138 : : }
14139 : : }
14140 : 138965073 : else if (ctype && sfk == sfk_conversion)
14141 : : {
14142 : 582871 : if (explicitp == 1)
14143 : : {
14144 : 274227 : maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
14145 : 274227 : explicitp = 2;
14146 : : }
14147 : : }
14148 : 138382202 : else if (sfk == sfk_deduction_guide)
14149 : : {
14150 : 896792 : if (explicitp == 1)
14151 : 165529999 : explicitp = 2;
14152 : : }
14153 : :
14154 : 165529999 : if (xobj_parm)
14155 : : {
14156 : 17399 : if (!ctype
14157 : 17399 : && decl_context == NORMAL
14158 : 49 : && (in_namespace
14159 : 49 : || !declarator->declarator->u.id.qualifying_scope))
14160 : 4 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
14161 : : "a non-member function cannot have "
14162 : : "an explicit object parameter");
14163 : : else
14164 : : {
14165 : 17395 : if (virtualp)
14166 : : {
14167 : 16 : auto_diagnostic_group d;
14168 : 16 : error_at (declspecs->locations[ds_virtual],
14169 : : "an explicit object member function cannot "
14170 : : "be %<virtual%>");
14171 : 16 : inform (DECL_SOURCE_LOCATION (xobj_parm),
14172 : : "explicit object parameter declared here");
14173 : 16 : virtualp = false;
14174 : 16 : }
14175 : 17395 : if (staticp >= 2)
14176 : : {
14177 : 2 : auto_diagnostic_group d;
14178 : 2 : error_at (declspecs->locations[ds_storage_class],
14179 : : "an explicit object member function cannot "
14180 : : "be %<static%>");
14181 : 2 : inform (DECL_SOURCE_LOCATION (xobj_parm),
14182 : : "explicit object parameter declared here");
14183 : 2 : }
14184 : 17395 : if (unqualified_id
14185 : 165547388 : && identifier_p (unqualified_id)
14186 : 34784 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
14187 : 8 : error_at (DECL_SOURCE_LOCATION (xobj_parm),
14188 : : "%qD cannot be an explicit object member "
14189 : : "function", unqualified_id);
14190 : : }
14191 : : }
14192 : 165529999 : tree pushed_scope = NULL_TREE;
14193 : 165529999 : if (funcdecl_p
14194 : 165529999 : && decl_context != FIELD
14195 : 74897657 : && inner_declarator->u.id.qualifying_scope
14196 : 174290975 : && CLASS_TYPE_P (inner_declarator->u.id.qualifying_scope))
14197 : 8759756 : pushed_scope
14198 : 8759756 : = push_scope (inner_declarator->u.id.qualifying_scope);
14199 : :
14200 : 165529999 : arg_types = grokparms (declarator->u.function.parameters, &parms);
14201 : :
14202 : 165529999 : if (pushed_scope)
14203 : 8759756 : pop_scope (pushed_scope);
14204 : :
14205 : 165529999 : if (inner_declarator
14206 : 165050181 : && inner_declarator->kind == cdk_id
14207 : 163198183 : && inner_declarator->u.id.sfk == sfk_destructor
14208 : 2981285 : && arg_types != void_list_node)
14209 : : {
14210 : 20 : error_at (declarator->id_loc,
14211 : : "destructors may not have parameters");
14212 : 20 : arg_types = void_list_node;
14213 : 20 : parms = NULL_TREE;
14214 : 20 : is_xobj_member_function = false;
14215 : : }
14216 : :
14217 : 165529999 : type = build_function_type (type, arg_types);
14218 : :
14219 : 165529999 : tree attrs = declarator->std_attributes;
14220 : 165529999 : if (tx_qual)
14221 : : {
14222 : 242 : tree att = build_tree_list (tx_qual, NULL_TREE);
14223 : : /* transaction_safe applies to the type, but
14224 : : transaction_safe_dynamic applies to the function. */
14225 : 242 : if (is_attribute_p ("transaction_safe", tx_qual))
14226 : 213 : attrs = attr_chainon (attrs, att);
14227 : : else
14228 : 29 : returned_attrs = attr_chainon (returned_attrs, att);
14229 : : }
14230 : :
14231 : : /* Actually apply the contract attributes to the declaration. */
14232 : 165531110 : for (tree *p = &attrs; *p;)
14233 : : {
14234 : 1111 : tree l = *p;
14235 : 1111 : if (cxx_contract_attribute_p (l))
14236 : : {
14237 : 660 : *p = TREE_CHAIN (l);
14238 : : /* Intentionally reverse order of contracts so they're
14239 : : reversed back into their lexical order. */
14240 : 660 : TREE_CHAIN (l) = NULL_TREE;
14241 : 660 : returned_attrs = chainon (l, returned_attrs);
14242 : : }
14243 : : else
14244 : 451 : p = &TREE_CHAIN (l);
14245 : : }
14246 : :
14247 : 165529999 : if (attrs)
14248 : : /* [dcl.fct]/2:
14249 : :
14250 : : The optional attribute-specifier-seq appertains to
14251 : : the function type. */
14252 : 439 : cplus_decl_attributes (&type, attrs, 0);
14253 : :
14254 : 165529999 : if (raises)
14255 : 64676963 : type = build_exception_variant (type, raises);
14256 : : }
14257 : 165529999 : break;
14258 : :
14259 : 170307509 : case cdk_pointer:
14260 : 170307509 : case cdk_reference:
14261 : 170307509 : case cdk_ptrmem:
14262 : : /* Filter out pointers-to-references and references-to-references.
14263 : : We can get these if a TYPE_DECL is used. */
14264 : :
14265 : 170307509 : if (TYPE_REF_P (type))
14266 : : {
14267 : 235 : if (declarator->kind != cdk_reference)
14268 : : {
14269 : 3 : error ("cannot declare pointer to %q#T", type);
14270 : 3 : type = TREE_TYPE (type);
14271 : : }
14272 : :
14273 : : /* In C++0x, we allow reference to reference declarations
14274 : : that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
14275 : : and template type arguments [14.3.1/4 temp.arg.type]. The
14276 : : check for direct reference to reference declarations, which
14277 : : are still forbidden, occurs below. Reasoning behind the change
14278 : : can be found in DR106, DR540, and the rvalue reference
14279 : : proposals. */
14280 : 232 : else if (cxx_dialect == cxx98)
14281 : : {
14282 : 0 : error ("cannot declare reference to %q#T", type);
14283 : 0 : type = TREE_TYPE (type);
14284 : : }
14285 : : }
14286 : 170307274 : else if (VOID_TYPE_P (type))
14287 : : {
14288 : 4372578 : if (declarator->kind == cdk_reference)
14289 : 4 : error ("cannot declare reference to %q#T", type);
14290 : 4372574 : else if (declarator->kind == cdk_ptrmem)
14291 : 3 : error ("cannot declare pointer to %q#T member", type);
14292 : : }
14293 : :
14294 : : /* We now know that the TYPE_QUALS don't apply to the decl,
14295 : : but to the target of the pointer. */
14296 : 170307509 : type_quals = TYPE_UNQUALIFIED;
14297 : :
14298 : : /* This code used to handle METHOD_TYPE, but I don't think it's
14299 : : possible to get it here anymore. */
14300 : 170307509 : gcc_assert (TREE_CODE (type) != METHOD_TYPE);
14301 : 170307509 : if (declarator->kind == cdk_ptrmem
14302 : 1136978 : && TREE_CODE (type) == FUNCTION_TYPE)
14303 : : {
14304 : 947555 : memfn_quals |= type_memfn_quals (type);
14305 : 1895110 : type = build_memfn_type (type,
14306 : 947555 : declarator->u.pointer.class_type,
14307 : : memfn_quals,
14308 : : rqual);
14309 : 947555 : if (type == error_mark_node)
14310 : : return error_mark_node;
14311 : :
14312 : : rqual = REF_QUAL_NONE;
14313 : : memfn_quals = TYPE_UNQUALIFIED;
14314 : : }
14315 : :
14316 : 170307506 : if (TREE_CODE (type) == FUNCTION_TYPE
14317 : 170307506 : && (type_memfn_quals (type) != TYPE_UNQUALIFIED
14318 : 959982 : || type_memfn_rqual (type) != REF_QUAL_NONE))
14319 : 15 : error (declarator->kind == cdk_reference
14320 : : ? G_("cannot declare reference to qualified function type %qT")
14321 : : : G_("cannot declare pointer to qualified function type %qT"),
14322 : : type);
14323 : :
14324 : : /* When the pointed-to type involves components of variable size,
14325 : : care must be taken to ensure that the size evaluation code is
14326 : : emitted early enough to dominate all the possible later uses
14327 : : and late enough for the variables on which it depends to have
14328 : : been assigned.
14329 : :
14330 : : This is expected to happen automatically when the pointed-to
14331 : : type has a name/declaration of it's own, but special attention
14332 : : is required if the type is anonymous.
14333 : :
14334 : : We handle the NORMAL and FIELD contexts here by inserting a
14335 : : dummy statement that just evaluates the size at a safe point
14336 : : and ensures it is not deferred until e.g. within a deeper
14337 : : conditional context (c++/43555).
14338 : :
14339 : : We expect nothing to be needed here for PARM or TYPENAME.
14340 : : Evaluating the size at this point for TYPENAME would
14341 : : actually be incorrect, as we might be in the middle of an
14342 : : expression with side effects on the pointed-to type size
14343 : : "arguments" prior to the pointer declaration point and the
14344 : : size evaluation could end up prior to the side effects. */
14345 : :
14346 : 170307506 : if (!TYPE_NAME (type)
14347 : 5146667 : && (decl_context == NORMAL || decl_context == FIELD)
14348 : 578448 : && at_function_scope_p ()
14349 : 170347482 : && variably_modified_type_p (type, NULL_TREE))
14350 : : {
14351 : 96 : TYPE_NAME (type) = build_decl (UNKNOWN_LOCATION, TYPE_DECL,
14352 : : NULL_TREE, type);
14353 : 96 : add_decl_expr (TYPE_NAME (type));
14354 : : }
14355 : :
14356 : 170307506 : if (declarator->kind == cdk_reference)
14357 : : {
14358 : : /* In C++0x, the type we are creating a reference to might be
14359 : : a typedef which is itself a reference type. In that case,
14360 : : we follow the reference collapsing rules in
14361 : : [7.1.3/8 dcl.typedef] to create the final reference type:
14362 : :
14363 : : "If a typedef TD names a type that is a reference to a type
14364 : : T, an attempt to create the type 'lvalue reference to cv TD'
14365 : : creates the type 'lvalue reference to T,' while an attempt
14366 : : to create the type "rvalue reference to cv TD' creates the
14367 : : type TD."
14368 : : */
14369 : 111318965 : if (VOID_TYPE_P (type))
14370 : : /* We already gave an error. */;
14371 : 111318961 : else if (TYPE_REF_P (type))
14372 : : {
14373 : 232 : if (declarator->u.reference.rvalue_ref)
14374 : : /* Leave type alone. */;
14375 : : else
14376 : 115 : type = cp_build_reference_type (TREE_TYPE (type), false);
14377 : : }
14378 : : else
14379 : 111318729 : type = cp_build_reference_type
14380 : 111318729 : (type, declarator->u.reference.rvalue_ref);
14381 : :
14382 : : /* In C++0x, we need this check for direct reference to
14383 : : reference declarations, which are forbidden by
14384 : : [8.3.2/5 dcl.ref]. Reference to reference declarations
14385 : : are only allowed indirectly through typedefs and template
14386 : : type arguments. Example:
14387 : :
14388 : : void foo(int & &); // invalid ref-to-ref decl
14389 : :
14390 : : typedef int & int_ref;
14391 : : void foo(int_ref &); // valid ref-to-ref decl
14392 : : */
14393 : 111318965 : if (inner_declarator && inner_declarator->kind == cdk_reference)
14394 : 0 : error ("cannot declare reference to %q#T, which is not "
14395 : : "a typedef or a template type argument", type);
14396 : : }
14397 : 58988541 : else if (TREE_CODE (type) == METHOD_TYPE)
14398 : 947552 : type = build_ptrmemfunc_type (build_pointer_type (type));
14399 : 58040989 : else if (declarator->kind == cdk_ptrmem)
14400 : : {
14401 : 189423 : gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
14402 : : != NAMESPACE_DECL);
14403 : 189423 : if (declarator->u.pointer.class_type == error_mark_node)
14404 : : /* We will already have complained. */
14405 : 3 : type = error_mark_node;
14406 : : else
14407 : 189420 : type = build_ptrmem_type (declarator->u.pointer.class_type,
14408 : : type);
14409 : : }
14410 : : else
14411 : 57851566 : type = build_pointer_type (type);
14412 : :
14413 : : /* Process a list of type modifier keywords (such as
14414 : : const or volatile) that were given inside the `*' or `&'. */
14415 : :
14416 : 170307506 : if (declarator->u.pointer.qualifiers)
14417 : : {
14418 : 8064169 : type
14419 : 8064169 : = cp_build_qualified_type (type,
14420 : : declarator->u.pointer.qualifiers);
14421 : 8064169 : type_quals = cp_type_quals (type);
14422 : : }
14423 : :
14424 : : /* Apply C++11 attributes to the pointer, and not to the
14425 : : type pointed to. This is unlike what is done for GNU
14426 : : attributes above. It is to comply with [dcl.ptr]/1:
14427 : :
14428 : : [the optional attribute-specifier-seq (7.6.1) appertains
14429 : : to the pointer and not to the object pointed to]. */
14430 : 170307506 : if (declarator->std_attributes)
14431 : 112 : decl_attributes (&type, declarator->std_attributes,
14432 : : 0);
14433 : :
14434 : : ctype = NULL_TREE;
14435 : : break;
14436 : :
14437 : : case cdk_error:
14438 : : break;
14439 : :
14440 : 0 : default:
14441 : 0 : gcc_unreachable ();
14442 : : }
14443 : : }
14444 : :
14445 : 864905647 : id_loc = declarator ? declarator->id_loc : input_location;
14446 : :
14447 : 864905647 : if (innermost_code != cdk_function
14448 : : /* Don't check this if it can be the artifical decltype(auto)
14449 : : we created when building a constraint in a compound-requirement:
14450 : : that the type-constraint is plain is going to be checked in
14451 : : cp_parser_compound_requirement. */
14452 : 864905647 : && decl_context != TYPENAME
14453 : 864905647 : && check_decltype_auto (id_loc, type))
14454 : 19 : return error_mark_node;
14455 : :
14456 : : /* A `constexpr' specifier used in an object declaration declares
14457 : : the object as `const'. */
14458 : 864905628 : if (constexpr_p && innermost_code != cdk_function)
14459 : : {
14460 : : /* DR1688 says that a `constexpr' specifier in combination with
14461 : : `volatile' is valid. */
14462 : :
14463 : 12656052 : if (!TYPE_REF_P (type))
14464 : : {
14465 : 12646286 : type_quals |= TYPE_QUAL_CONST;
14466 : 12646286 : type = cp_build_qualified_type (type, type_quals);
14467 : : }
14468 : : }
14469 : :
14470 : 503335496 : if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
14471 : 1783337 : && !FUNC_OR_METHOD_TYPE_P (type)
14472 : 865840432 : && !variable_template_p (TREE_OPERAND (unqualified_id, 0)))
14473 : : {
14474 : 0 : error ("template-id %qD used as a declarator",
14475 : : unqualified_id);
14476 : 0 : unqualified_id = dname;
14477 : : }
14478 : :
14479 : : /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
14480 : : qualified with a class-name, turn it into a METHOD_TYPE, unless
14481 : : we know that the function is static. We take advantage of this
14482 : : opportunity to do other processing that pertains to entities
14483 : : explicitly declared to be class members. Note that if DECLARATOR
14484 : : is non-NULL, we know it is a cdk_id declarator; otherwise, we
14485 : : would not have exited the loop above. */
14486 : 864905628 : if (declarator
14487 : 503404368 : && declarator->kind == cdk_id
14488 : 503335496 : && declarator->u.id.qualifying_scope
14489 : 874127574 : && MAYBE_CLASS_TYPE_P (declarator->u.id.qualifying_scope))
14490 : : {
14491 : 9128359 : ctype = declarator->u.id.qualifying_scope;
14492 : 9128359 : ctype = TYPE_MAIN_VARIANT (ctype);
14493 : 9128359 : template_count = num_template_headers_for_class (ctype);
14494 : :
14495 : 9128359 : if (ctype == current_class_type)
14496 : : {
14497 : 54 : if (friendp)
14498 : : {
14499 : 15 : permerror (declspecs->locations[ds_friend],
14500 : : "member functions are implicitly "
14501 : : "friends of their class");
14502 : 15 : friendp = 0;
14503 : : }
14504 : : else
14505 : 39 : permerror (id_loc, "extra qualification %<%T::%> on member %qs",
14506 : : ctype, name);
14507 : : }
14508 : 9128305 : else if (/* If the qualifying type is already complete, then we
14509 : : can skip the following checks. */
14510 : 9128305 : !COMPLETE_TYPE_P (ctype)
14511 : 150 : && (/* If the function is being defined, then
14512 : : qualifying type must certainly be complete. */
14513 : : funcdef_flag
14514 : : /* A friend declaration of "T::f" is OK, even if
14515 : : "T" is a template parameter. But, if this
14516 : : function is not a friend, the qualifying type
14517 : : must be a class. */
14518 : 111 : || (!friendp && !CLASS_TYPE_P (ctype))
14519 : : /* For a declaration, the type need not be
14520 : : complete, if either it is dependent (since there
14521 : : is no meaningful definition of complete in that
14522 : : case) or the qualifying class is currently being
14523 : : defined. */
14524 : 123 : || !(dependent_type_p (ctype)
14525 : 24 : || currently_open_class (ctype)))
14526 : : /* Check that the qualifying type is complete. */
14527 : 9128371 : && !complete_type_or_else (ctype, NULL_TREE))
14528 : 66 : return error_mark_node;
14529 : 9128239 : else if (TREE_CODE (type) == FUNCTION_TYPE)
14530 : : {
14531 : 8759993 : if (current_class_type
14532 : 264 : && (!friendp || funcdef_flag || initialized))
14533 : : {
14534 : 59 : error_at (id_loc, funcdef_flag || initialized
14535 : : ? G_("cannot define member function %<%T::%s%> "
14536 : : "within %qT")
14537 : : : G_("cannot declare member function %<%T::%s%> "
14538 : : "within %qT"),
14539 : : ctype, name, current_class_type);
14540 : 49 : return error_mark_node;
14541 : : }
14542 : : }
14543 : 368246 : else if (typedef_p && current_class_type)
14544 : : {
14545 : 0 : error_at (id_loc, "cannot declare member %<%T::%s%> within %qT",
14546 : : ctype, name, current_class_type);
14547 : 0 : return error_mark_node;
14548 : : }
14549 : : }
14550 : :
14551 : 864905513 : if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
14552 : 48068807 : ctype = current_class_type;
14553 : :
14554 : : /* Now TYPE has the actual type. */
14555 : :
14556 : 864905513 : if (returned_attrs)
14557 : : {
14558 : 3100 : if (attrlist)
14559 : 3100 : *attrlist = attr_chainon (returned_attrs, *attrlist);
14560 : : else
14561 : : attrlist = &returned_attrs;
14562 : : }
14563 : :
14564 : 864905513 : if (declarator
14565 : 503404253 : && declarator->kind == cdk_id
14566 : 503335381 : && declarator->std_attributes
14567 : 328227 : && attrlist != NULL)
14568 : : {
14569 : : /* [dcl.meaning]/1: The optional attribute-specifier-seq following
14570 : : a declarator-id appertains to the entity that is declared. */
14571 : 328224 : if (declarator->std_attributes != error_mark_node)
14572 : 328206 : *attrlist = attr_chainon (declarator->std_attributes, *attrlist);
14573 : : else
14574 : : /* We should have already diagnosed the issue (c++/78344). */
14575 : 18 : gcc_assert (seen_error ());
14576 : : }
14577 : :
14578 : : /* Handle parameter packs. */
14579 : 864905513 : if (parameter_pack_p)
14580 : : {
14581 : 2724569 : if (decl_context == PARM)
14582 : : /* Turn the type into a pack expansion.*/
14583 : 2724569 : type = make_pack_expansion (type);
14584 : : else
14585 : 0 : error ("non-parameter %qs cannot be a parameter pack", name);
14586 : : }
14587 : :
14588 : 864905513 : if ((decl_context == FIELD || decl_context == PARM)
14589 : 398459392 : && !processing_template_decl
14590 : 993156395 : && variably_modified_type_p (type, NULL_TREE))
14591 : : {
14592 : 12 : if (decl_context == FIELD)
14593 : 6 : error_at (id_loc,
14594 : : "data member may not have variably modified type %qT", type);
14595 : : else
14596 : 6 : error_at (id_loc,
14597 : : "parameter may not have variably modified type %qT", type);
14598 : 12 : type = error_mark_node;
14599 : : }
14600 : :
14601 : 864905513 : if (explicitp == 1 || (explicitp && friendp))
14602 : : {
14603 : : /* [dcl.fct.spec] (C++11) The explicit specifier shall be used only
14604 : : in the declaration of a constructor or conversion function within
14605 : : a class definition. */
14606 : 28 : if (!current_class_type)
14607 : 13 : error_at (declspecs->locations[ds_explicit],
14608 : : "%<explicit%> outside class declaration");
14609 : 15 : else if (friendp)
14610 : 12 : error_at (declspecs->locations[ds_explicit],
14611 : : "%<explicit%> in friend declaration");
14612 : : else
14613 : 3 : error_at (declspecs->locations[ds_explicit],
14614 : : "only declarations of constructors and conversion operators "
14615 : : "can be %<explicit%>");
14616 : : explicitp = 0;
14617 : : }
14618 : :
14619 : 864905513 : if (storage_class == sc_mutable)
14620 : : {
14621 : 140506 : location_t sloc = declspecs->locations[ds_storage_class];
14622 : 140506 : if (decl_context != FIELD || friendp)
14623 : : {
14624 : 12 : error_at (sloc, "non-member %qs cannot be declared %<mutable%>",
14625 : : name);
14626 : 12 : storage_class = sc_none;
14627 : : }
14628 : 140494 : else if (decl_context == TYPENAME || typedef_p)
14629 : : {
14630 : 0 : error_at (sloc,
14631 : : "non-object member %qs cannot be declared %<mutable%>",
14632 : : name);
14633 : 0 : storage_class = sc_none;
14634 : : }
14635 : 140494 : else if (FUNC_OR_METHOD_TYPE_P (type))
14636 : : {
14637 : 3 : error_at (sloc, "function %qs cannot be declared %<mutable%>",
14638 : : name);
14639 : 3 : storage_class = sc_none;
14640 : : }
14641 : 140491 : else if (staticp)
14642 : : {
14643 : 0 : error_at (sloc, "%<static%> %qs cannot be declared %<mutable%>",
14644 : : name);
14645 : 0 : storage_class = sc_none;
14646 : : }
14647 : 140491 : else if (type_quals & TYPE_QUAL_CONST)
14648 : : {
14649 : 9 : error_at (sloc, "%<const%> %qs cannot be declared %<mutable%>",
14650 : : name);
14651 : 9 : storage_class = sc_none;
14652 : : }
14653 : 140482 : else if (TYPE_REF_P (type))
14654 : : {
14655 : 6 : permerror (sloc, "reference %qs cannot be declared %<mutable%>",
14656 : : name);
14657 : 6 : storage_class = sc_none;
14658 : : }
14659 : : }
14660 : :
14661 : : /* If this is declaring a typedef name, return a TYPE_DECL. */
14662 : 864905513 : if (typedef_p && decl_context != TYPENAME)
14663 : : {
14664 : 41156403 : bool alias_p = decl_spec_seq_has_spec_p (declspecs, ds_alias);
14665 : 41156403 : tree decl;
14666 : :
14667 : 41156403 : if (funcdef_flag)
14668 : : {
14669 : 6 : if (decl_context == NORMAL)
14670 : 3 : error_at (id_loc,
14671 : : "typedef may not be a function definition");
14672 : : else
14673 : 3 : error_at (id_loc,
14674 : : "typedef may not be a member function definition");
14675 : 6 : return error_mark_node;
14676 : : }
14677 : :
14678 : : /* This declaration:
14679 : :
14680 : : typedef void f(int) const;
14681 : :
14682 : : declares a function type which is not a member of any
14683 : : particular class, but which is cv-qualified; for
14684 : : example "f S::*" declares a pointer to a const-qualified
14685 : : member function of S. We record the cv-qualification in the
14686 : : function type. */
14687 : 41156397 : if ((rqual || memfn_quals) && TREE_CODE (type) == FUNCTION_TYPE)
14688 : : {
14689 : 62 : type = apply_memfn_quals (type, memfn_quals, rqual);
14690 : :
14691 : : /* We have now dealt with these qualifiers. */
14692 : 62 : memfn_quals = TYPE_UNQUALIFIED;
14693 : 62 : rqual = REF_QUAL_NONE;
14694 : : }
14695 : :
14696 : 41156397 : if (type_uses_auto (type))
14697 : : {
14698 : 41 : if (alias_p)
14699 : 19 : error_at (declspecs->locations[ds_type_spec],
14700 : : "%<auto%> not allowed in alias declaration");
14701 : : else
14702 : 22 : error_at (declspecs->locations[ds_type_spec],
14703 : : "typedef declared %<auto%>");
14704 : 41 : type = error_mark_node;
14705 : : }
14706 : :
14707 : 41156397 : if (reqs)
14708 : 3 : error_at (location_of (reqs), "requires-clause on typedef");
14709 : :
14710 : 41156397 : if (id_declarator && declarator->u.id.qualifying_scope)
14711 : : {
14712 : 22 : error_at (id_loc, "typedef name may not be a nested-name-specifier");
14713 : 22 : type = error_mark_node;
14714 : : }
14715 : :
14716 : 41156397 : if (decl_context == FIELD)
14717 : 22495389 : decl = build_lang_decl_loc (id_loc, TYPE_DECL, unqualified_id, type);
14718 : : else
14719 : 18661008 : decl = build_decl (id_loc, TYPE_DECL, unqualified_id, type);
14720 : :
14721 : 41156397 : if (decl_context != FIELD)
14722 : : {
14723 : 18661008 : if (!current_function_decl)
14724 : 7695724 : DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
14725 : 10965284 : else if (DECL_MAYBE_IN_CHARGE_CDTOR_P (current_function_decl))
14726 : : /* The TYPE_DECL is "abstract" because there will be
14727 : : clones of this constructor/destructor, and there will
14728 : : be copies of this TYPE_DECL generated in those
14729 : : clones. The decloning optimization (for space) may
14730 : : revert this subsequently if it determines that
14731 : : the clones should share a common implementation. */
14732 : 134704 : DECL_ABSTRACT_P (decl) = true;
14733 : :
14734 : 18661008 : set_originating_module (decl);
14735 : : }
14736 : 22495389 : else if (current_class_type
14737 : 22495389 : && constructor_name_p (unqualified_id, current_class_type))
14738 : 3 : permerror (id_loc, "ISO C++ forbids nested type %qD with same name "
14739 : : "as enclosing class",
14740 : : unqualified_id);
14741 : :
14742 : : /* If the user declares "typedef struct {...} foo" then the
14743 : : struct will have an anonymous name. Fill that name in now.
14744 : : Nothing can refer to it, so nothing needs know about the name
14745 : : change. */
14746 : 41156397 : if (type != error_mark_node
14747 : 41156334 : && unqualified_id
14748 : 41156331 : && TYPE_NAME (type)
14749 : 38421001 : && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
14750 : 76923561 : && TYPE_UNNAMED_P (type)
14751 : 367428 : && declspecs->type_definition_p
14752 : 367361 : && attributes_naming_typedef_ok (*attrlist)
14753 : 41523755 : && cp_type_quals (type) == TYPE_UNQUALIFIED)
14754 : 367340 : name_unnamed_type (type, decl);
14755 : :
14756 : 41156397 : if (signed_p
14757 : 41156397 : || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
14758 : 336826 : C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
14759 : :
14760 : 41156397 : bad_specifiers (decl, BSP_TYPE, virtualp,
14761 : : memfn_quals != TYPE_UNQUALIFIED,
14762 : : inlinep, friendp, raises != NULL_TREE,
14763 : : declspecs->locations);
14764 : :
14765 : 41156397 : if (alias_p)
14766 : : /* Acknowledge that this was written:
14767 : : `using analias = atype;'. */
14768 : 15420409 : TYPE_DECL_ALIAS_P (decl) = 1;
14769 : :
14770 : 41156397 : return decl;
14771 : : }
14772 : :
14773 : : /* Detect the case of an array type of unspecified size
14774 : : which came, as such, direct from a typedef name.
14775 : : We must copy the type, so that the array's domain can be
14776 : : individually set by the object's initializer. */
14777 : :
14778 : 823749110 : if (type && typedef_type
14779 : 798371587 : && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
14780 : 824242417 : && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
14781 : 79 : type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
14782 : :
14783 : : /* Detect where we're using a typedef of function type to declare a
14784 : : function. PARMS will not be set, so we must create it now. */
14785 : :
14786 : 823749110 : if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
14787 : : {
14788 : 14741 : tree decls = NULL_TREE;
14789 : 14741 : tree args;
14790 : :
14791 : 14741 : for (args = TYPE_ARG_TYPES (type);
14792 : 31950 : args && args != void_list_node;
14793 : 17209 : args = TREE_CHAIN (args))
14794 : : {
14795 : 17209 : tree decl = cp_build_parm_decl (NULL_TREE, NULL_TREE,
14796 : 17209 : TREE_VALUE (args));
14797 : :
14798 : 17209 : DECL_CHAIN (decl) = decls;
14799 : 17209 : decls = decl;
14800 : : }
14801 : :
14802 : 14741 : parms = nreverse (decls);
14803 : :
14804 : 14741 : if (decl_context != TYPENAME)
14805 : : {
14806 : : /* The qualifiers on the function type become the qualifiers on
14807 : : the non-static member function. */
14808 : 14057 : memfn_quals |= type_memfn_quals (type);
14809 : 14057 : rqual = type_memfn_rqual (type);
14810 : 14057 : type_quals = TYPE_UNQUALIFIED;
14811 : 14057 : raises = TYPE_RAISES_EXCEPTIONS (type);
14812 : : }
14813 : : }
14814 : :
14815 : : /* If this is a type name (such as, in a cast or sizeof),
14816 : : compute the type and return it now. */
14817 : :
14818 : 823748426 : if (decl_context == TYPENAME)
14819 : : {
14820 : : /* Note that here we don't care about type_quals. */
14821 : :
14822 : : /* Special case: "friend class foo" looks like a TYPENAME context. */
14823 : 319774753 : if (friendp)
14824 : : {
14825 : 0 : if (inlinep)
14826 : : {
14827 : 0 : error ("%<inline%> specified for friend class declaration");
14828 : 0 : inlinep = 0;
14829 : : }
14830 : :
14831 : 0 : if (!current_aggr)
14832 : : {
14833 : : /* Don't allow friend declaration without a class-key. */
14834 : 0 : if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
14835 : 0 : permerror (input_location, "template parameters cannot be friends");
14836 : 0 : else if (TREE_CODE (type) == TYPENAME_TYPE)
14837 : 0 : permerror (input_location, "friend declaration requires class-key, "
14838 : : "i.e. %<friend class %T::%D%>",
14839 : 0 : TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
14840 : : else
14841 : 0 : permerror (input_location, "friend declaration requires class-key, "
14842 : : "i.e. %<friend %#T%>",
14843 : : type);
14844 : : }
14845 : :
14846 : : /* Only try to do this stuff if we didn't already give up. */
14847 : 0 : if (type != integer_type_node)
14848 : : {
14849 : : /* A friendly class? */
14850 : 0 : if (current_class_type)
14851 : 0 : make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
14852 : : /*complain=*/true);
14853 : : else
14854 : 0 : error ("trying to make class %qT a friend of global scope",
14855 : : type);
14856 : :
14857 : 0 : type = void_type_node;
14858 : : }
14859 : : }
14860 : 319774753 : else if (memfn_quals || rqual)
14861 : : {
14862 : 63476 : if (ctype == NULL_TREE
14863 : 63476 : && TREE_CODE (type) == METHOD_TYPE)
14864 : 0 : ctype = TYPE_METHOD_BASETYPE (type);
14865 : :
14866 : 63476 : if (ctype)
14867 : 0 : type = build_memfn_type (type, ctype, memfn_quals, rqual);
14868 : : /* Core issue #547: need to allow this in template type args.
14869 : : Allow it in general in C++11 for alias-declarations. */
14870 : 63476 : else if ((template_type_arg || cxx_dialect >= cxx11)
14871 : 63474 : && TREE_CODE (type) == FUNCTION_TYPE)
14872 : 63472 : type = apply_memfn_quals (type, memfn_quals, rqual);
14873 : : else
14874 : 4 : error ("invalid qualifiers on non-member function type");
14875 : : }
14876 : :
14877 : 319774753 : if (reqs)
14878 : 3 : error_at (location_of (reqs), "requires-clause on type-id");
14879 : :
14880 : 319774753 : return type;
14881 : : }
14882 : 503974357 : else if (unqualified_id == NULL_TREE && decl_context != PARM
14883 : 657209 : && decl_context != CATCHPARM
14884 : 200108 : && TREE_CODE (type) != UNION_TYPE
14885 : 199875 : && ! bitfield
14886 : 199875 : && innermost_code != cdk_decomp)
14887 : : {
14888 : 9 : error ("abstract declarator %qT used as declaration", type);
14889 : 9 : return error_mark_node;
14890 : : }
14891 : :
14892 : 503974348 : if (!FUNC_OR_METHOD_TYPE_P (type))
14893 : : {
14894 : : /* Only functions may be declared using an operator-function-id. */
14895 : 340813064 : if (dname && IDENTIFIER_ANY_OP_P (dname))
14896 : : {
14897 : 8 : error_at (id_loc, "declaration of %qD as non-function", dname);
14898 : 8 : return error_mark_node;
14899 : : }
14900 : :
14901 : 340813056 : if (reqs)
14902 : 15 : error_at (location_of (reqs),
14903 : : "requires-clause on declaration of non-function type %qT",
14904 : : type);
14905 : : }
14906 : :
14907 : : /* We don't check parameter types here because we can emit a better
14908 : : error message later. */
14909 : 503974340 : if (decl_context != PARM)
14910 : : {
14911 : 241884244 : type = check_var_type (unqualified_id, type, id_loc);
14912 : 241884244 : if (type == error_mark_node)
14913 : : return error_mark_node;
14914 : : }
14915 : :
14916 : : /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
14917 : : or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
14918 : :
14919 : 503974258 : if (decl_context == PARM || decl_context == CATCHPARM)
14920 : : {
14921 : 262559037 : if (ctype || in_namespace)
14922 : 0 : error ("cannot use %<::%> in parameter declaration");
14923 : :
14924 : 262559037 : tree auto_node = type_uses_auto (type);
14925 : 262559037 : if (auto_node && !(cxx_dialect >= cxx17 && template_parm_flag))
14926 : : {
14927 : 86 : bool err_p = true;
14928 : 86 : if (cxx_dialect >= cxx14)
14929 : : {
14930 : 144 : if (decl_context == PARM && AUTO_IS_DECLTYPE (auto_node))
14931 : 3 : error_at (typespec_loc,
14932 : : "cannot declare a parameter with %<decltype(auto)%>");
14933 : 75 : else if (tree c = CLASS_PLACEHOLDER_TEMPLATE (auto_node))
14934 : : {
14935 : 4 : auto_diagnostic_group g;
14936 : 4 : gcc_rich_location richloc (typespec_loc);
14937 : 4 : richloc.add_fixit_insert_after ("<>");
14938 : 4 : error_at (&richloc,
14939 : : "missing template argument list after %qE; template "
14940 : : "placeholder not permitted in parameter", c);
14941 : 4 : if (decl_context == PARM && cxx_dialect >= cxx20)
14942 : 3 : inform (typespec_loc, "or use %<auto%> for an "
14943 : : "abbreviated function template");
14944 : 4 : inform (DECL_SOURCE_LOCATION (c), "%qD declared here", c);
14945 : 4 : }
14946 : 71 : else if (decl_context == CATCHPARM || template_parm_flag)
14947 : 14 : error_at (typespec_loc,
14948 : : "%<auto%> parameter not permitted in this context");
14949 : : else
14950 : : /* Do not issue an error while tentatively parsing a function
14951 : : parameter: for T t(auto(a), 42);, when we just saw the 1st
14952 : : parameter, we don't know yet that this construct won't be
14953 : : a function declaration. Defer the checking to
14954 : : cp_parser_parameter_declaration_clause. */
14955 : : err_p = false;
14956 : : }
14957 : : else
14958 : 8 : error_at (typespec_loc, "parameter declared %<auto%>");
14959 : 29 : if (err_p)
14960 : 29 : type = error_mark_node;
14961 : : }
14962 : :
14963 : : /* A parameter declared as an array of T is really a pointer to T.
14964 : : One declared as a function is really a pointer to a function.
14965 : : One declared as a member is really a pointer to member. */
14966 : :
14967 : 262559037 : if (TREE_CODE (type) == ARRAY_TYPE)
14968 : : {
14969 : : /* Transfer const-ness of array into that of type pointed to. */
14970 : 706011 : type = build_pointer_type (TREE_TYPE (type));
14971 : 706011 : type_quals = TYPE_UNQUALIFIED;
14972 : 706011 : array_parameter_p = true;
14973 : : }
14974 : 261853026 : else if (TREE_CODE (type) == FUNCTION_TYPE)
14975 : 102948 : type = build_pointer_type (type);
14976 : : }
14977 : :
14978 : 119399395 : if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
14979 : : /* Don't convert xobj member functions to METHOD_TYPE. */
14980 : 93457604 : && !is_xobj_member_function
14981 : 589409647 : && !(unqualified_id
14982 : 170860304 : && identifier_p (unqualified_id)
14983 : 85435091 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id)))
14984 : : {
14985 : 85425213 : cp_cv_quals real_quals = memfn_quals;
14986 : 85425213 : if (cxx_dialect < cxx14 && constexpr_p
14987 : 628626 : && sfk != sfk_constructor && sfk != sfk_destructor)
14988 : 3573 : real_quals |= TYPE_QUAL_CONST;
14989 : 85425213 : type = build_memfn_type (type, ctype, real_quals, rqual);
14990 : : }
14991 : :
14992 : 503974258 : {
14993 : 503974258 : tree decl = NULL_TREE;
14994 : :
14995 : 503974258 : if (decl_context == PARM)
14996 : : {
14997 : 262090096 : decl = cp_build_parm_decl (NULL_TREE, unqualified_id, type);
14998 : 262090096 : DECL_ARRAY_PARAMETER_P (decl) = array_parameter_p;
14999 : :
15000 : 262090096 : bad_specifiers (decl, BSP_PARM, virtualp,
15001 : : memfn_quals != TYPE_UNQUALIFIED,
15002 : : inlinep, friendp, raises != NULL_TREE,
15003 : : declspecs->locations);
15004 : : }
15005 : 241884162 : else if (decl_context == FIELD)
15006 : : {
15007 : 113873888 : if (!staticp && !friendp && !FUNC_OR_METHOD_TYPE_P (type))
15008 : 15960718 : if (tree auto_node = type_uses_auto (type))
15009 : : {
15010 : 19 : location_t tloc = declspecs->locations[ds_type_spec];
15011 : 19 : if (CLASS_PLACEHOLDER_TEMPLATE (auto_node))
15012 : 4 : error_at (tloc, "invalid use of template-name %qE without an "
15013 : : "argument list",
15014 : 4 : CLASS_PLACEHOLDER_TEMPLATE (auto_node));
15015 : : else
15016 : 15 : error_at (tloc, "non-static data member declared with "
15017 : : "placeholder %qT", auto_node);
15018 : 19 : type = error_mark_node;
15019 : : }
15020 : :
15021 : : /* The C99 flexible array extension. */
15022 : 96256209 : if (!staticp && TREE_CODE (type) == ARRAY_TYPE
15023 : 114932011 : && TYPE_DOMAIN (type) == NULL_TREE)
15024 : : {
15025 : 1367 : if (ctype
15026 : 1367 : && (TREE_CODE (ctype) == UNION_TYPE
15027 : 1367 : || TREE_CODE (ctype) == QUAL_UNION_TYPE))
15028 : 84 : pedwarn (id_loc, OPT_Wpedantic,
15029 : : "flexible array member in union is a GCC extension");
15030 : :
15031 : : else
15032 : : {
15033 : : /* Array is a flexible member. */
15034 : 1283 : if (name)
15035 : 1283 : pedwarn (id_loc, OPT_Wpedantic,
15036 : : "ISO C++ forbids flexible array member %qs", name);
15037 : : else
15038 : : pedwarn (input_location, OPT_Wpedantic,
15039 : : "ISO C++ forbids flexible array members");
15040 : :
15041 : : /* Flexible array member has a null domain. */
15042 : 1283 : type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
15043 : : }
15044 : : }
15045 : :
15046 : 113873888 : if (type == error_mark_node)
15047 : : {
15048 : : /* Happens when declaring arrays of sizes which
15049 : : are error_mark_node, for example. */
15050 : 19 : decl = NULL_TREE;
15051 : : }
15052 : 113873869 : else if (in_namespace && !friendp)
15053 : : {
15054 : : /* Something like struct S { int N::j; }; */
15055 : 6 : error_at (id_loc, "invalid use of %<::%>");
15056 : 6 : return error_mark_node;
15057 : : }
15058 : 113873863 : else if (FUNC_OR_METHOD_TYPE_P (type) && unqualified_id)
15059 : : {
15060 : 88300298 : int publicp = 0;
15061 : 88300298 : tree function_context;
15062 : :
15063 : 88300298 : if (friendp == 0)
15064 : : {
15065 : : /* This should never happen in pure C++ (the check
15066 : : could be an assert). It could happen in
15067 : : Objective-C++ if someone writes invalid code that
15068 : : uses a function declaration for an instance
15069 : : variable or property (instance variables and
15070 : : properties are parsed as FIELD_DECLs, but they are
15071 : : part of an Objective-C class, not a C++ class).
15072 : : That code is invalid and is caught by this
15073 : : check. */
15074 : 84697660 : if (!ctype)
15075 : : {
15076 : 0 : error ("declaration of function %qD in invalid context",
15077 : : unqualified_id);
15078 : 0 : return error_mark_node;
15079 : : }
15080 : :
15081 : : /* ``A union may [ ... ] not [ have ] virtual functions.''
15082 : : ARM 9.5 */
15083 : 84697660 : if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
15084 : : {
15085 : 3 : error_at (declspecs->locations[ds_virtual],
15086 : : "function %qD declared %<virtual%> inside a union",
15087 : : unqualified_id);
15088 : 3 : return error_mark_node;
15089 : : }
15090 : :
15091 : 3895643 : if (virtualp
15092 : 92195938 : && identifier_p (unqualified_id)
15093 : 3895643 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
15094 : : {
15095 : 9 : error_at (declspecs->locations[ds_virtual],
15096 : : "%qD cannot be declared %<virtual%>, since it "
15097 : : "is always static", unqualified_id);
15098 : 9 : virtualp = 0;
15099 : : }
15100 : : }
15101 : :
15102 : : /* Check that the name used for a destructor makes sense. */
15103 : 88300295 : if (sfk == sfk_destructor)
15104 : : {
15105 : 2814785 : tree uqname = id_declarator->u.id.unqualified_name;
15106 : :
15107 : 2814785 : if (!ctype)
15108 : : {
15109 : 12 : gcc_assert (friendp);
15110 : 12 : error_at (id_loc, "expected qualified name in friend "
15111 : : "declaration for destructor %qD", uqname);
15112 : 12 : return error_mark_node;
15113 : : }
15114 : :
15115 : 2814773 : if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
15116 : : {
15117 : 9 : error_at (id_loc, "declaration of %qD as member of %qT",
15118 : : uqname, ctype);
15119 : 9 : return error_mark_node;
15120 : : }
15121 : 2814764 : if (concept_p)
15122 : : {
15123 : 9 : error_at (declspecs->locations[ds_concept],
15124 : : "a destructor cannot be %qs", "concept");
15125 : 9 : return error_mark_node;
15126 : : }
15127 : 2814755 : if (constexpr_p && cxx_dialect < cxx20)
15128 : : {
15129 : 6 : error_at (declspecs->locations[ds_constexpr],
15130 : : "%<constexpr%> destructors only available"
15131 : : " with %<-std=c++20%> or %<-std=gnu++20%>");
15132 : 6 : return error_mark_node;
15133 : : }
15134 : 2814749 : if (consteval_p)
15135 : : {
15136 : 3 : error_at (declspecs->locations[ds_consteval],
15137 : : "a destructor cannot be %qs", "consteval");
15138 : 3 : return error_mark_node;
15139 : : }
15140 : : }
15141 : 85485510 : else if (sfk == sfk_constructor && friendp && !ctype)
15142 : : {
15143 : 0 : error ("expected qualified name in friend declaration "
15144 : : "for constructor %qD",
15145 : 0 : id_declarator->u.id.unqualified_name);
15146 : 0 : return error_mark_node;
15147 : : }
15148 : 88300256 : if (sfk == sfk_constructor)
15149 : 20147506 : if (concept_p)
15150 : : {
15151 : 9 : error_at (declspecs->locations[ds_concept],
15152 : : "a constructor cannot be %<concept%>");
15153 : 9 : return error_mark_node;
15154 : : }
15155 : 68152750 : if (concept_p)
15156 : : {
15157 : 9 : error_at (declspecs->locations[ds_concept],
15158 : : "a concept cannot be a member function");
15159 : 9 : concept_p = false;
15160 : : }
15161 : 88300238 : else if (consteval_p
15162 : 88356834 : && identifier_p (unqualified_id)
15163 : 88356825 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
15164 : : {
15165 : 9 : error_at (declspecs->locations[ds_consteval],
15166 : : "%qD cannot be %qs", unqualified_id, "consteval");
15167 : 9 : consteval_p = false;
15168 : : }
15169 : :
15170 : 88300247 : if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
15171 : : {
15172 : 11195 : tree tmpl = TREE_OPERAND (unqualified_id, 0);
15173 : 11195 : if (variable_template_p (tmpl))
15174 : : {
15175 : 3 : auto_diagnostic_group d;
15176 : 3 : error_at (id_loc, "specialization of variable template "
15177 : : "%qD declared as function", tmpl);
15178 : 3 : inform (DECL_SOURCE_LOCATION (tmpl),
15179 : : "variable template declared here");
15180 : 3 : return error_mark_node;
15181 : 3 : }
15182 : : }
15183 : :
15184 : : /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
15185 : 88300244 : function_context
15186 : 88300244 : = (ctype != NULL_TREE
15187 : 88300244 : ? decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE);
15188 : 176600488 : publicp = ((! friendp || ! staticp)
15189 : 88300244 : && function_context == NULL_TREE);
15190 : :
15191 : 88300244 : decl = grokfndecl (ctype, type,
15192 : 88300244 : TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
15193 : : ? unqualified_id : dname,
15194 : : parms,
15195 : : unqualified_id,
15196 : : declspecs,
15197 : : reqs,
15198 : : virtualp, flags, memfn_quals, rqual, raises,
15199 : : friendp ? -1 : 0, friendp, publicp,
15200 : 88300244 : inlinep | (2 * constexpr_p) | (4 * concept_p)
15201 : 88300244 : | (8 * consteval_p),
15202 : : initialized == SD_DELETED,
15203 : : is_xobj_member_function, sfk,
15204 : : funcdef_flag, late_return_type_p,
15205 : : template_count, in_namespace,
15206 : : attrlist, id_loc);
15207 : 88300244 : decl = set_virt_specifiers (decl, virt_specifiers);
15208 : 88300244 : if (decl == NULL_TREE)
15209 : 95 : return error_mark_node;
15210 : : #if 0
15211 : : /* This clobbers the attrs stored in `decl' from `attrlist'. */
15212 : : /* The decl and setting of decl_attr is also turned off. */
15213 : : decl = build_decl_attribute_variant (decl, decl_attr);
15214 : : #endif
15215 : :
15216 : : /* [class.conv.ctor]
15217 : :
15218 : : A constructor declared without the function-specifier
15219 : : explicit that can be called with a single parameter
15220 : : specifies a conversion from the type of its first
15221 : : parameter to the type of its class. Such a constructor
15222 : : is called a converting constructor. */
15223 : 88300149 : if (explicitp == 2)
15224 : 5141593 : DECL_NONCONVERTING_P (decl) = 1;
15225 : :
15226 : 88300149 : if (declspecs->explicit_specifier)
15227 : 117388 : store_explicit_specifier (decl, declspecs->explicit_specifier);
15228 : : }
15229 : 25573565 : else if (!staticp
15230 : 25573565 : && ((current_class_type
15231 : 15960716 : && same_type_p (TYPE_MAIN_VARIANT (type),
15232 : : current_class_type))
15233 : 15960626 : || (!dependent_type_p (type)
15234 : 9873898 : && !COMPLETE_TYPE_P (complete_type (type))
15235 : 1409 : && (!complete_or_array_type_p (type)
15236 : 1340 : || initialized == SD_UNINITIALIZED))))
15237 : : {
15238 : 1466 : if (TREE_CODE (type) != ARRAY_TYPE
15239 : 1466 : || !COMPLETE_TYPE_P (TREE_TYPE (type)))
15240 : : {
15241 : 159 : if (unqualified_id)
15242 : : {
15243 : 114 : auto_diagnostic_group d;
15244 : 114 : error_at (id_loc, "field %qD has incomplete type %qT",
15245 : : unqualified_id, type);
15246 : 114 : cxx_incomplete_type_inform (strip_array_types (type));
15247 : 114 : }
15248 : : else
15249 : 45 : error ("name %qT has incomplete type", type);
15250 : :
15251 : 159 : type = error_mark_node;
15252 : 159 : decl = NULL_TREE;
15253 : : }
15254 : : }
15255 : 41531337 : else if (!verify_type_context (input_location,
15256 : : staticp
15257 : : ? TCTX_STATIC_STORAGE
15258 : : : TCTX_FIELD, type))
15259 : : {
15260 : 0 : type = error_mark_node;
15261 : 0 : decl = NULL_TREE;
15262 : : }
15263 : : else
15264 : : {
15265 : 25572093 : if (friendp)
15266 : : {
15267 : 14 : if (unqualified_id)
15268 : 11 : error_at (id_loc,
15269 : : "%qE is neither function nor member function; "
15270 : : "cannot be declared friend", unqualified_id);
15271 : : else
15272 : 3 : error ("unnamed field is neither function nor member "
15273 : : "function; cannot be declared friend");
15274 : 14 : return error_mark_node;
15275 : : }
15276 : 25572079 : decl = NULL_TREE;
15277 : : }
15278 : :
15279 : 113873713 : if (friendp)
15280 : : {
15281 : : /* Packages tend to use GNU attributes on friends, so we only
15282 : : warn for standard attributes. */
15283 : 3602609 : if (attrlist
15284 : 3602609 : && !funcdef_flag
15285 : 1134947 : && cxx11_attribute_p (*attrlist)
15286 : 3602638 : && !all_attributes_are_contracts_p (*attrlist))
15287 : : {
15288 : 27 : *attrlist = NULL_TREE;
15289 : 27 : auto_diagnostic_group d;
15290 : 27 : if (warning_at (id_loc, OPT_Wattributes, "attribute ignored"))
15291 : 27 : inform (id_loc, "an attribute that appertains to a friend "
15292 : : "declaration that is not a definition is ignored");
15293 : 27 : }
15294 : : /* Friends are treated specially. */
15295 : 3602609 : if (ctype == current_class_type)
15296 : : ; /* We already issued a permerror. */
15297 : 3602609 : else if (decl && DECL_NAME (decl))
15298 : : {
15299 : 3602606 : set_originating_module (decl, true);
15300 : :
15301 : 3602606 : if (initialized)
15302 : : /* Kludge: We need funcdef_flag to be true in do_friend for
15303 : : in-class defaulted functions, but that breaks grokfndecl.
15304 : : So set it here. */
15305 : 47497 : funcdef_flag = true;
15306 : :
15307 : 3602606 : cplus_decl_attributes (&decl, *attrlist, 0);
15308 : 3602606 : *attrlist = NULL_TREE;
15309 : :
15310 : 3602606 : tree scope = ctype ? ctype : in_namespace;
15311 : 3602606 : decl = do_friend (scope, unqualified_id, decl,
15312 : : flags, funcdef_flag);
15313 : 3602606 : return decl;
15314 : : }
15315 : : else
15316 : 3 : return error_mark_node;
15317 : : }
15318 : :
15319 : : /* Structure field. It may not be a function, except for C++. */
15320 : :
15321 : 110271104 : if (decl == NULL_TREE)
15322 : : {
15323 : 25573561 : if (staticp)
15324 : : {
15325 : : /* C++ allows static class members. All other work
15326 : : for this is done by grokfield. */
15327 : 9612849 : decl = build_lang_decl_loc (id_loc, VAR_DECL,
15328 : : dname, type);
15329 : 9612849 : if (unqualified_id
15330 : 9612846 : && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
15331 : : {
15332 : 79614 : decl = check_explicit_specialization (unqualified_id, decl,
15333 : : template_count,
15334 : : concept_p * 8);
15335 : 79614 : if (decl == error_mark_node)
15336 : : return error_mark_node;
15337 : : }
15338 : 9612849 : set_linkage_for_static_data_member (decl);
15339 : 9612849 : if (concept_p)
15340 : 15 : error_at (declspecs->locations[ds_concept],
15341 : : "static data member %qE declared %qs",
15342 : : unqualified_id, "concept");
15343 : 9612834 : else if (constexpr_p && !initialized)
15344 : : {
15345 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
15346 : : "%<constexpr%> static data member %qD must "
15347 : : "have an initializer", decl);
15348 : 9 : constexpr_p = false;
15349 : : }
15350 : 9612849 : if (consteval_p)
15351 : 3 : error_at (declspecs->locations[ds_consteval],
15352 : : "static data member %qE declared %qs",
15353 : : unqualified_id, "consteval");
15354 : :
15355 : 9612849 : if (inlinep)
15356 : 6171 : mark_inline_variable (decl, declspecs->locations[ds_inline]);
15357 : :
15358 : 9612849 : if (!DECL_VAR_DECLARED_INLINE_P (decl)
15359 : 9612849 : && !(cxx_dialect >= cxx17 && constexpr_p))
15360 : : /* Even if there is an in-class initialization, DECL
15361 : : is considered undefined until an out-of-class
15362 : : definition is provided, unless this is an inline
15363 : : variable. */
15364 : 1652336 : DECL_EXTERNAL (decl) = 1;
15365 : :
15366 : 9612849 : if (thread_p)
15367 : : {
15368 : 393 : CP_DECL_THREAD_LOCAL_P (decl) = true;
15369 : 393 : if (!processing_template_decl)
15370 : 365 : set_decl_tls_model (decl, decl_default_tls_model (decl));
15371 : 393 : if (declspecs->gnu_thread_keyword_p)
15372 : 31 : SET_DECL_GNU_TLS_P (decl);
15373 : : }
15374 : :
15375 : : /* Set the constraints on the declaration. */
15376 : 9612849 : bool memtmpl = (current_template_depth
15377 : 9612849 : > template_class_depth (current_class_type));
15378 : 9612849 : if (memtmpl)
15379 : : {
15380 : 280846 : tree ci = current_template_constraints ();
15381 : 280846 : set_constraints (decl, ci);
15382 : : }
15383 : : }
15384 : : else
15385 : : {
15386 : 15960712 : if (concept_p)
15387 : : {
15388 : 12 : error_at (declspecs->locations[ds_concept],
15389 : : "non-static data member %qE declared %qs",
15390 : : unqualified_id, "concept");
15391 : 12 : concept_p = false;
15392 : 12 : constexpr_p = false;
15393 : : }
15394 : 15960700 : else if (constexpr_p)
15395 : : {
15396 : 9 : error_at (declspecs->locations[ds_constexpr],
15397 : : "non-static data member %qE declared %qs",
15398 : : unqualified_id, "constexpr");
15399 : 9 : constexpr_p = false;
15400 : : }
15401 : 15960712 : if (constinit_p)
15402 : : {
15403 : 6 : error_at (declspecs->locations[ds_constinit],
15404 : : "non-static data member %qE declared %qs",
15405 : : unqualified_id, "constinit");
15406 : 6 : constinit_p = false;
15407 : : }
15408 : 15960712 : if (consteval_p)
15409 : : {
15410 : 3 : error_at (declspecs->locations[ds_consteval],
15411 : : "non-static data member %qE declared %qs",
15412 : : unqualified_id, "consteval");
15413 : 3 : consteval_p = false;
15414 : : }
15415 : 15960712 : decl = build_decl (id_loc, FIELD_DECL, unqualified_id, type);
15416 : 15960712 : DECL_NONADDRESSABLE_P (decl) = bitfield;
15417 : 15960712 : if (bitfield && !unqualified_id)
15418 : 130985 : DECL_PADDING_P (decl) = 1;
15419 : :
15420 : 15960712 : if (storage_class == sc_mutable)
15421 : : {
15422 : 140476 : DECL_MUTABLE_P (decl) = 1;
15423 : 140476 : storage_class = sc_none;
15424 : : }
15425 : :
15426 : 15960712 : if (initialized)
15427 : : {
15428 : : /* An attempt is being made to initialize a non-static
15429 : : member. This is new in C++11. */
15430 : 1024922 : maybe_warn_cpp0x (CPP0X_NSDMI, init_loc);
15431 : :
15432 : : /* If this has been parsed with static storage class, but
15433 : : errors forced staticp to be cleared, ensure NSDMI is
15434 : : not present. */
15435 : 1024922 : if (declspecs->storage_class == sc_static)
15436 : 3 : DECL_INITIAL (decl) = error_mark_node;
15437 : : }
15438 : : }
15439 : :
15440 : 41534273 : bad_specifiers (decl, BSP_FIELD, virtualp,
15441 : : memfn_quals != TYPE_UNQUALIFIED,
15442 : : staticp ? false : inlinep, friendp,
15443 : : raises != NULL_TREE,
15444 : : declspecs->locations);
15445 : : }
15446 : : }
15447 : 128010274 : else if (FUNC_OR_METHOD_TYPE_P (type))
15448 : : {
15449 : 74758032 : tree original_name;
15450 : 74758032 : int publicp = 0;
15451 : :
15452 : 74758032 : if (!unqualified_id)
15453 : 0 : return error_mark_node;
15454 : :
15455 : 74758032 : if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
15456 : : original_name = dname;
15457 : : else
15458 : 73920700 : original_name = unqualified_id;
15459 : : // FIXME:gcc_assert (original_name == dname);
15460 : :
15461 : 74758032 : if (storage_class == sc_auto)
15462 : 1 : error_at (declspecs->locations[ds_storage_class],
15463 : : "storage class %<auto%> invalid for function %qs", name);
15464 : 74758031 : else if (storage_class == sc_register)
15465 : 7 : error_at (declspecs->locations[ds_storage_class],
15466 : : "storage class %<register%> invalid for function %qs",
15467 : : name);
15468 : 74758024 : else if (thread_p)
15469 : : {
15470 : 12 : if (declspecs->gnu_thread_keyword_p)
15471 : 12 : error_at (declspecs->locations[ds_thread],
15472 : : "storage class %<__thread%> invalid for function %qs",
15473 : : name);
15474 : : else
15475 : 0 : error_at (declspecs->locations[ds_thread],
15476 : : "storage class %<thread_local%> invalid for "
15477 : : "function %qs", name);
15478 : : }
15479 : 74758012 : else if (constinit_p)
15480 : 3 : error_at (declspecs->locations[ds_constinit],
15481 : : "%<constinit%> specifier invalid for function %qs", name);
15482 : :
15483 : 74758032 : if (virt_specifiers)
15484 : 6 : error ("virt-specifiers in %qs not allowed outside a class "
15485 : : "definition", name);
15486 : : /* Function declaration not at top level.
15487 : : Storage classes other than `extern' are not allowed
15488 : : and `extern' makes no difference. */
15489 : 74758032 : if (! toplevel_bindings_p ()
15490 : 34308 : && (storage_class == sc_static
15491 : 34299 : || decl_spec_seq_has_spec_p (declspecs, ds_inline))
15492 : 74758044 : && pedantic)
15493 : : {
15494 : 9 : if (storage_class == sc_static)
15495 : 6 : pedwarn (declspecs->locations[ds_storage_class], OPT_Wpedantic,
15496 : : "%<static%> specifier invalid for function %qs "
15497 : : "declared out of global scope", name);
15498 : : else
15499 : 3 : pedwarn (declspecs->locations[ds_inline], OPT_Wpedantic,
15500 : : "%<inline%> specifier invalid for function %qs "
15501 : : "declared out of global scope", name);
15502 : : }
15503 : :
15504 : 74758032 : if (ctype == NULL_TREE)
15505 : : {
15506 : 65998309 : if (virtualp)
15507 : : {
15508 : 0 : error ("virtual non-class function %qs", name);
15509 : 0 : virtualp = 0;
15510 : : }
15511 : 65998309 : else if (sfk == sfk_constructor
15512 : 65998309 : || sfk == sfk_destructor)
15513 : : {
15514 : 3 : error (funcdef_flag
15515 : : ? G_("%qs defined in a non-class scope")
15516 : : : G_("%qs declared in a non-class scope"), name);
15517 : 3 : sfk = sfk_none;
15518 : : }
15519 : : }
15520 : 74758032 : if (consteval_p
15521 : 74783693 : && identifier_p (unqualified_id)
15522 : 74783693 : && IDENTIFIER_NEWDEL_OP_P (unqualified_id))
15523 : : {
15524 : 9 : error_at (declspecs->locations[ds_consteval],
15525 : : "%qD cannot be %qs", unqualified_id, "consteval");
15526 : 9 : consteval_p = false;
15527 : : }
15528 : :
15529 : : /* Record whether the function is public. */
15530 : 74758032 : publicp = (ctype != NULL_TREE
15531 : 74758032 : || storage_class != sc_static);
15532 : :
15533 : 149516064 : decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
15534 : : declspecs,
15535 : : reqs, virtualp, flags, memfn_quals, rqual, raises,
15536 : : 1, friendp,
15537 : : publicp,
15538 : 74758032 : inlinep | (2 * constexpr_p) | (4 * concept_p)
15539 : 74758032 : | (8 * consteval_p),
15540 : : initialized == SD_DELETED,
15541 : : is_xobj_member_function, sfk,
15542 : : funcdef_flag,
15543 : : late_return_type_p,
15544 : : template_count, in_namespace, attrlist,
15545 : : id_loc);
15546 : 74758032 : if (decl == NULL_TREE)
15547 : 506 : return error_mark_node;
15548 : :
15549 : 74757526 : if (explicitp == 2)
15550 : 2096 : DECL_NONCONVERTING_P (decl) = 1;
15551 : 74757526 : if (staticp == 1)
15552 : : {
15553 : 104568 : int invalid_static = 0;
15554 : :
15555 : : /* Don't allow a static member function in a class, and forbid
15556 : : declaring main to be static. */
15557 : 104568 : if (TREE_CODE (type) == METHOD_TYPE)
15558 : : {
15559 : 0 : permerror (input_location, "cannot declare member function %qD to have "
15560 : : "static linkage", decl);
15561 : 0 : invalid_static = 1;
15562 : : }
15563 : 104568 : else if (current_function_decl)
15564 : : {
15565 : : /* 7.1.1: There can be no static function declarations within a
15566 : : block. */
15567 : 9 : error_at (declspecs->locations[ds_storage_class],
15568 : : "cannot declare static function inside another function");
15569 : 9 : invalid_static = 1;
15570 : : }
15571 : :
15572 : 9 : if (invalid_static)
15573 : : {
15574 : 74757526 : staticp = 0;
15575 : : storage_class = sc_none;
15576 : : }
15577 : : }
15578 : 74757526 : if (declspecs->explicit_specifier)
15579 : 3 : store_explicit_specifier (decl, declspecs->explicit_specifier);
15580 : : }
15581 : : else
15582 : : {
15583 : : /* It's a variable. */
15584 : :
15585 : : /* An uninitialized decl with `extern' is a reference. */
15586 : 106136260 : decl = grokvardecl (type, dname, unqualified_id,
15587 : : declspecs,
15588 : : initialized,
15589 : : type_quals,
15590 : : inlinep,
15591 : : concept_p,
15592 : : template_count,
15593 : : ctype ? ctype : in_namespace,
15594 : : id_loc);
15595 : 53252242 : if (decl == NULL_TREE)
15596 : 49 : return error_mark_node;
15597 : :
15598 : 53252193 : bad_specifiers (decl, BSP_VAR, virtualp,
15599 : : memfn_quals != TYPE_UNQUALIFIED,
15600 : : inlinep, friendp, raises != NULL_TREE,
15601 : : declspecs->locations);
15602 : :
15603 : 53252193 : if (ctype)
15604 : : {
15605 : 368218 : DECL_CONTEXT (decl) = ctype;
15606 : 368218 : if (staticp == 1)
15607 : : {
15608 : 6 : permerror (declspecs->locations[ds_storage_class],
15609 : : "%<static%> may not be used when defining "
15610 : : "(as opposed to declaring) a static data member");
15611 : 6 : staticp = 0;
15612 : 6 : storage_class = sc_none;
15613 : : }
15614 : 368218 : if (storage_class == sc_register && TREE_STATIC (decl))
15615 : : {
15616 : 0 : error ("static member %qD declared %<register%>", decl);
15617 : 0 : storage_class = sc_none;
15618 : : }
15619 : 368218 : if (storage_class == sc_extern && pedantic)
15620 : : {
15621 : 0 : pedwarn (input_location, OPT_Wpedantic,
15622 : : "cannot explicitly declare member %q#D to have "
15623 : : "extern linkage", decl);
15624 : 0 : storage_class = sc_none;
15625 : : }
15626 : : }
15627 : 52883975 : else if (constexpr_p && DECL_EXTERNAL (decl))
15628 : : {
15629 : 12 : error_at (DECL_SOURCE_LOCATION (decl),
15630 : : "declaration of %<constexpr%> variable %qD "
15631 : : "is not a definition", decl);
15632 : 12 : constexpr_p = false;
15633 : : }
15634 : 53252193 : if (consteval_p)
15635 : : {
15636 : 3 : error_at (DECL_SOURCE_LOCATION (decl),
15637 : : "a variable cannot be declared %<consteval%>");
15638 : 3 : consteval_p = false;
15639 : : }
15640 : :
15641 : 53252193 : if (inlinep)
15642 : 3660757 : mark_inline_variable (decl, declspecs->locations[ds_inline]);
15643 : 53252193 : if (innermost_code == cdk_decomp)
15644 : : {
15645 : 68872 : gcc_assert (declarator && declarator->kind == cdk_decomp);
15646 : 68872 : DECL_SOURCE_LOCATION (decl) = id_loc;
15647 : 68872 : DECL_ARTIFICIAL (decl) = 1;
15648 : 68872 : fit_decomposition_lang_decl (decl, NULL_TREE);
15649 : : }
15650 : : }
15651 : :
15652 : 500370919 : if (VAR_P (decl) && !initialized)
15653 : 6546590 : if (tree auto_node = type_uses_auto (type))
15654 : 94 : if (!CLASS_PLACEHOLDER_TEMPLATE (auto_node))
15655 : : {
15656 : 18 : location_t loc = declspecs->locations[ds_type_spec];
15657 : 18 : error_at (loc, "declaration of %q#D has no initializer", decl);
15658 : 18 : TREE_TYPE (decl) = error_mark_node;
15659 : : }
15660 : :
15661 : 500370919 : if (storage_class == sc_extern && initialized && !funcdef_flag)
15662 : : {
15663 : 241 : if (toplevel_bindings_p ())
15664 : : {
15665 : : /* It's common practice (and completely valid) to have a const
15666 : : be initialized and declared extern. */
15667 : 235 : if (!(type_quals & TYPE_QUAL_CONST))
15668 : 20 : warning_at (DECL_SOURCE_LOCATION (decl), 0,
15669 : : "%qs initialized and declared %<extern%>", name);
15670 : : }
15671 : : else
15672 : : {
15673 : 6 : error_at (DECL_SOURCE_LOCATION (decl),
15674 : : "%qs has both %<extern%> and initializer", name);
15675 : 6 : return error_mark_node;
15676 : : }
15677 : : }
15678 : :
15679 : : /* Record `register' declaration for warnings on &
15680 : : and in case doing stupid register allocation. */
15681 : :
15682 : 500370913 : if (storage_class == sc_register)
15683 : : {
15684 : 2039 : DECL_REGISTER (decl) = 1;
15685 : : /* Warn about register storage specifiers on PARM_DECLs. */
15686 : 2039 : if (TREE_CODE (decl) == PARM_DECL)
15687 : : {
15688 : 35 : if (cxx_dialect >= cxx17)
15689 : 22 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
15690 : : "ISO C++17 does not allow %<register%> storage "
15691 : : "class specifier");
15692 : : else
15693 : 13 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wregister,
15694 : : "%<register%> storage class specifier used");
15695 : : }
15696 : : }
15697 : 500368874 : else if (storage_class == sc_extern)
15698 : 29612644 : DECL_THIS_EXTERN (decl) = 1;
15699 : 470756230 : else if (storage_class == sc_static)
15700 : 17929888 : DECL_THIS_STATIC (decl) = 1;
15701 : :
15702 : 500370913 : if (VAR_P (decl))
15703 : : {
15704 : : /* Set constexpr flag on vars (functions got it in grokfndecl). */
15705 : 62865036 : if (constexpr_p)
15706 : 12655983 : DECL_DECLARED_CONSTEXPR_P (decl) = true;
15707 : : /* And the constinit flag (which only applies to variables). */
15708 : 50209053 : else if (constinit_p)
15709 : 344 : DECL_DECLARED_CONSTINIT_P (decl) = true;
15710 : : }
15711 : 437505877 : else if (TREE_CODE (decl) == FUNCTION_DECL)
15712 : : {
15713 : : /* If we saw a return type, record its location. */
15714 : 159455069 : location_t loc = declspecs->locations[ds_type_spec];
15715 : 159455069 : if (loc == UNKNOWN_LOCATION)
15716 : : /* Build DECL_RESULT in start_preparsed_function. */;
15717 : 132231649 : else if (!DECL_RESULT (decl))
15718 : : {
15719 : 132196829 : tree restype = TREE_TYPE (TREE_TYPE (decl));
15720 : 132196829 : tree resdecl = build_decl (loc, RESULT_DECL, 0, restype);
15721 : 132196829 : DECL_ARTIFICIAL (resdecl) = 1;
15722 : 132196829 : DECL_IGNORED_P (resdecl) = 1;
15723 : 132196829 : DECL_RESULT (decl) = resdecl;
15724 : : }
15725 : 34820 : else if (funcdef_flag)
15726 : 3 : DECL_SOURCE_LOCATION (DECL_RESULT (decl)) = loc;
15727 : : }
15728 : :
15729 : : /* Record constancy and volatility on the DECL itself . There's
15730 : : no need to do this when processing a template; we'll do this
15731 : : for the instantiated declaration based on the type of DECL. */
15732 : 500370913 : if (!processing_template_decl
15733 : : /* Don't do it for instantiated variable templates either,
15734 : : cp_apply_type_quals_to_decl should have been called on it
15735 : : already and might have been overridden in cp_finish_decl
15736 : : if initializer needs runtime initialization. */
15737 : 500370913 : && (!VAR_P (decl) || !DECL_TEMPLATE_INSTANTIATED (decl)))
15738 : 170757202 : cp_apply_type_quals_to_decl (type_quals, decl);
15739 : :
15740 : 500370913 : return decl;
15741 : : }
15742 : 864906283 : }
15743 : :
15744 : : /* Subroutine of start_function. Ensure that each of the parameter
15745 : : types (as listed in PARMS) is complete, as is required for a
15746 : : function definition. */
15747 : :
15748 : : static void
15749 : 132649046 : require_complete_types_for_parms (tree parms)
15750 : : {
15751 : 394861803 : for (; parms; parms = DECL_CHAIN (parms))
15752 : : {
15753 : 262212757 : if (dependent_type_p (TREE_TYPE (parms)))
15754 : 152475116 : continue;
15755 : 109737641 : if (!VOID_TYPE_P (TREE_TYPE (parms))
15756 : 109737641 : && complete_type_or_else (TREE_TYPE (parms), parms))
15757 : : {
15758 : 109737563 : relayout_decl (parms);
15759 : 109737563 : DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
15760 : :
15761 : 109737563 : abstract_virtuals_error (parms, TREE_TYPE (parms));
15762 : 109737563 : maybe_warn_parm_abi (TREE_TYPE (parms),
15763 : 109737563 : DECL_SOURCE_LOCATION (parms));
15764 : : }
15765 : : else
15766 : : /* grokparms or complete_type_or_else will have already issued
15767 : : an error. */
15768 : 78 : TREE_TYPE (parms) = error_mark_node;
15769 : : }
15770 : 132649046 : }
15771 : :
15772 : : /* Returns nonzero if T is a local variable. */
15773 : :
15774 : : int
15775 : 135374244 : local_variable_p (const_tree t)
15776 : : {
15777 : 135374244 : if ((VAR_P (t)
15778 : 62619561 : && (DECL_LOCAL_DECL_P (t)
15779 : 62619561 : || !DECL_CONTEXT (t)
15780 : 62578587 : || TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL))
15781 : 138481834 : || (TREE_CODE (t) == PARM_DECL))
15782 : 121052420 : return 1;
15783 : :
15784 : : return 0;
15785 : : }
15786 : :
15787 : : /* Like local_variable_p, but suitable for use as a tree-walking
15788 : : function. */
15789 : :
15790 : : static tree
15791 : 4738608 : local_variable_p_walkfn (tree *tp, int *walk_subtrees,
15792 : : void * /*data*/)
15793 : : {
15794 : 4738608 : if (unevaluated_p (TREE_CODE (*tp)))
15795 : : {
15796 : : /* DR 2082 permits local variables in unevaluated contexts
15797 : : within a default argument. */
15798 : 15 : *walk_subtrees = 0;
15799 : 15 : return NULL_TREE;
15800 : : }
15801 : :
15802 : 4738593 : if (local_variable_p (*tp)
15803 : 4738593 : && (!DECL_ARTIFICIAL (*tp) || DECL_NAME (*tp) == this_identifier))
15804 : : return *tp;
15805 : 4738593 : else if (TYPE_P (*tp))
15806 : 18 : *walk_subtrees = 0;
15807 : :
15808 : : return NULL_TREE;
15809 : : }
15810 : :
15811 : : /* Check that ARG, which is a default-argument expression for a
15812 : : parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
15813 : : something goes wrong. DECL may also be a _TYPE node, rather than a
15814 : : DECL, if there is no DECL available. */
15815 : :
15816 : : tree
15817 : 2435137 : check_default_argument (tree decl, tree arg, tsubst_flags_t complain)
15818 : : {
15819 : 2435137 : tree var;
15820 : 2435137 : tree decl_type;
15821 : :
15822 : 2435137 : if (TREE_CODE (arg) == DEFERRED_PARSE)
15823 : : /* We get a DEFERRED_PARSE when looking at an in-class declaration
15824 : : with a default argument. Ignore the argument for now; we'll
15825 : : deal with it after the class is complete. */
15826 : : return arg;
15827 : :
15828 : 1750709 : if (TYPE_P (decl))
15829 : : {
15830 : : decl_type = decl;
15831 : : decl = NULL_TREE;
15832 : : }
15833 : : else
15834 : 533299 : decl_type = TREE_TYPE (decl);
15835 : :
15836 : 1750709 : if (arg == error_mark_node
15837 : 1750601 : || decl == error_mark_node
15838 : 1750592 : || TREE_TYPE (arg) == error_mark_node
15839 : 3501301 : || decl_type == error_mark_node)
15840 : : /* Something already went wrong. There's no need to check
15841 : : further. */
15842 : : return error_mark_node;
15843 : :
15844 : : /* [dcl.fct.default]
15845 : :
15846 : : A default argument expression is implicitly converted to the
15847 : : parameter type. */
15848 : 1750592 : ++cp_unevaluated_operand;
15849 : : /* Avoid digest_init clobbering the initializer. */
15850 : 1750592 : tree carg = BRACE_ENCLOSED_INITIALIZER_P (arg) ? unshare_expr (arg): arg;
15851 : 1750592 : perform_implicit_conversion_flags (decl_type, carg, complain,
15852 : : LOOKUP_IMPLICIT);
15853 : 1750592 : --cp_unevaluated_operand;
15854 : :
15855 : : /* Avoid redundant -Wzero-as-null-pointer-constant warnings at
15856 : : the call sites. */
15857 : 1299258 : if (TYPE_PTR_OR_PTRMEM_P (decl_type)
15858 : 451349 : && null_ptr_cst_p (arg)
15859 : : /* Don't lose side-effects as in PR90473. */
15860 : 2090529 : && !TREE_SIDE_EFFECTS (arg))
15861 : 339934 : return nullptr_node;
15862 : :
15863 : : /* [dcl.fct.default]
15864 : :
15865 : : Local variables shall not be used in default argument
15866 : : expressions.
15867 : :
15868 : : The keyword `this' shall not be used in a default argument of a
15869 : : member function. */
15870 : 1410658 : var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
15871 : 1410658 : if (var)
15872 : : {
15873 : 0 : if (complain & tf_warning_or_error)
15874 : : {
15875 : 0 : if (DECL_NAME (var) == this_identifier)
15876 : 0 : permerror (input_location, "default argument %qE uses %qD",
15877 : : arg, var);
15878 : : else
15879 : 0 : error ("default argument %qE uses local variable %qD", arg, var);
15880 : : }
15881 : 0 : return error_mark_node;
15882 : : }
15883 : :
15884 : : /* All is well. */
15885 : 1410658 : return arg;
15886 : : }
15887 : :
15888 : : /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
15889 : :
15890 : : static tree
15891 : 249289392 : type_is_deprecated (tree type)
15892 : : {
15893 : 368298712 : enum tree_code code;
15894 : 368298712 : if (TREE_DEPRECATED (type))
15895 : : return type;
15896 : 368258239 : if (TYPE_NAME (type))
15897 : : {
15898 : 245234747 : if (TREE_DEPRECATED (TYPE_NAME (type)))
15899 : : return type;
15900 : : else
15901 : : {
15902 : 245234741 : cp_warn_deprecated_use_scopes (CP_DECL_CONTEXT (TYPE_NAME (type)));
15903 : 245234741 : return NULL_TREE;
15904 : : }
15905 : : }
15906 : :
15907 : : /* Do warn about using typedefs to a deprecated class. */
15908 : 123023492 : if (OVERLOAD_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
15909 : 0 : return type_is_deprecated (TYPE_MAIN_VARIANT (type));
15910 : :
15911 : 123023492 : code = TREE_CODE (type);
15912 : :
15913 : 123023492 : if (code == POINTER_TYPE || code == REFERENCE_TYPE
15914 : 123023492 : || code == OFFSET_TYPE || code == FUNCTION_TYPE
15915 : : || code == METHOD_TYPE || code == ARRAY_TYPE)
15916 : 118903973 : return type_is_deprecated (TREE_TYPE (type));
15917 : :
15918 : 105347 : if (TYPE_PTRMEMFUNC_P (type))
15919 : 105347 : return type_is_deprecated
15920 : 105347 : (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
15921 : :
15922 : : return NULL_TREE;
15923 : : }
15924 : :
15925 : : /* Returns an unavailable type used within TYPE, or NULL_TREE if none. */
15926 : :
15927 : : static tree
15928 : 250121819 : type_is_unavailable (tree type)
15929 : : {
15930 : 369636304 : enum tree_code code;
15931 : 369636304 : if (TREE_UNAVAILABLE (type))
15932 : : return type;
15933 : 369636298 : if (TYPE_NAME (type))
15934 : : {
15935 : 246078193 : if (TREE_UNAVAILABLE (TYPE_NAME (type)))
15936 : : return type;
15937 : : else
15938 : : {
15939 : 246078187 : cp_warn_deprecated_use_scopes (CP_DECL_CONTEXT (TYPE_NAME (type)));
15940 : 246078187 : return NULL_TREE;
15941 : : }
15942 : : }
15943 : :
15944 : : /* Do warn about using typedefs to a deprecated class. */
15945 : 123558105 : if (OVERLOAD_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
15946 : 0 : return type_is_deprecated (TYPE_MAIN_VARIANT (type));
15947 : :
15948 : 123558105 : code = TREE_CODE (type);
15949 : :
15950 : 123558105 : if (code == POINTER_TYPE || code == REFERENCE_TYPE
15951 : 123558105 : || code == OFFSET_TYPE || code == FUNCTION_TYPE
15952 : : || code == METHOD_TYPE || code == ARRAY_TYPE)
15953 : 119309242 : return type_is_unavailable (TREE_TYPE (type));
15954 : :
15955 : 205243 : if (TYPE_PTRMEMFUNC_P (type))
15956 : 205243 : return type_is_unavailable
15957 : 205243 : (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
15958 : :
15959 : : return NULL_TREE;
15960 : : }
15961 : :
15962 : : /* Decode the list of parameter types for a function type.
15963 : : Given the list of things declared inside the parens,
15964 : : return a list of types.
15965 : :
15966 : : If this parameter does not end with an ellipsis, we append
15967 : : void_list_node.
15968 : :
15969 : : *PARMS is set to the chain of PARM_DECLs created. */
15970 : :
15971 : : tree
15972 : 166159995 : grokparms (tree parmlist, tree *parms)
15973 : : {
15974 : 166159995 : tree result = NULL_TREE;
15975 : 166159995 : tree decls = NULL_TREE;
15976 : 166159995 : tree parm;
15977 : 166159995 : int any_error = 0;
15978 : :
15979 : 416867229 : for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
15980 : : {
15981 : 415548146 : tree type = NULL_TREE;
15982 : 415548146 : tree init = TREE_PURPOSE (parm);
15983 : 415548146 : tree decl = TREE_VALUE (parm);
15984 : :
15985 : 415548146 : if (parm == void_list_node || parm == explicit_void_list_node)
15986 : : break;
15987 : :
15988 : 250707246 : if (! decl || TREE_TYPE (decl) == error_mark_node)
15989 : : {
15990 : 152 : any_error = 1;
15991 : 152 : continue;
15992 : : }
15993 : :
15994 : 250707094 : type = TREE_TYPE (decl);
15995 : 250707094 : if (VOID_TYPE_P (type))
15996 : : {
15997 : 78 : if (same_type_p (type, void_type_node)
15998 : 69 : && !init
15999 : 57 : && !DECL_NAME (decl) && !result
16000 : 102 : && TREE_CHAIN (parm) == void_list_node)
16001 : : /* DR 577: A parameter list consisting of a single
16002 : : unnamed parameter of non-dependent type 'void'. */
16003 : : break;
16004 : 66 : else if (cv_qualified_p (type))
16005 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
16006 : : "invalid use of cv-qualified type %qT in "
16007 : : "parameter declaration", type);
16008 : : else
16009 : 57 : error_at (DECL_SOURCE_LOCATION (decl),
16010 : : "invalid use of type %<void%> in parameter "
16011 : : "declaration");
16012 : : /* It's not a good idea to actually create parameters of
16013 : : type `void'; other parts of the compiler assume that a
16014 : : void type terminates the parameter list. */
16015 : 66 : type = error_mark_node;
16016 : 66 : TREE_TYPE (decl) = error_mark_node;
16017 : : }
16018 : :
16019 : 250707082 : if (type != error_mark_node)
16020 : : {
16021 : 250707016 : if (deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
16022 : : {
16023 : 250121819 : tree unavailtype = type_is_unavailable (type);
16024 : 250121819 : if (unavailtype)
16025 : 12 : cp_handle_deprecated_or_unavailable (unavailtype);
16026 : : }
16027 : 250707016 : if (deprecated_state != DEPRECATED_SUPPRESS
16028 : 250707016 : && deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
16029 : : {
16030 : 249289392 : tree deptype = type_is_deprecated (type);
16031 : 249289392 : if (deptype)
16032 : 40479 : cp_handle_deprecated_or_unavailable (deptype);
16033 : : }
16034 : :
16035 : : /* [dcl.fct] "A parameter with volatile-qualified type is
16036 : : deprecated." */
16037 : 250707016 : if (CP_TYPE_VOLATILE_P (type))
16038 : 517 : warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wvolatile,
16039 : : "%<volatile%>-qualified parameter is "
16040 : : "deprecated");
16041 : :
16042 : : /* Top-level qualifiers on the parameters are
16043 : : ignored for function types. */
16044 : 250707016 : type = cp_build_qualified_type (type, 0);
16045 : 250707016 : if (TREE_CODE (type) == METHOD_TYPE)
16046 : : {
16047 : 0 : error ("parameter %qD invalidly declared method type", decl);
16048 : 0 : type = build_pointer_type (type);
16049 : 0 : TREE_TYPE (decl) = type;
16050 : : }
16051 : 250707016 : else if (cxx_dialect < cxx17 && INDIRECT_TYPE_P (type))
16052 : : {
16053 : : /* Before C++17 DR 393:
16054 : : [dcl.fct]/6, parameter types cannot contain pointers
16055 : : (references) to arrays of unknown bound. */
16056 : 1560728 : tree t = TREE_TYPE (type);
16057 : 1560728 : int ptr = TYPE_PTR_P (type);
16058 : :
16059 : 1713750 : while (1)
16060 : : {
16061 : 1637239 : if (TYPE_PTR_P (t))
16062 : : ptr = 1;
16063 : 1563801 : else if (TREE_CODE (t) != ARRAY_TYPE)
16064 : : break;
16065 : 3083 : else if (!TYPE_DOMAIN (t))
16066 : : break;
16067 : 76511 : t = TREE_TYPE (t);
16068 : : }
16069 : 1560728 : if (TREE_CODE (t) == ARRAY_TYPE)
16070 : 16 : pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wpedantic,
16071 : : ptr
16072 : : ? G_("parameter %qD includes pointer to array of "
16073 : : "unknown bound %qT")
16074 : : : G_("parameter %qD includes reference to array of "
16075 : : "unknown bound %qT"),
16076 : : decl, t);
16077 : : }
16078 : :
16079 : 250707016 : if (init && !processing_template_decl)
16080 : 1217718 : init = check_default_argument (decl, init, tf_warning_or_error);
16081 : : }
16082 : :
16083 : 250707082 : DECL_CHAIN (decl) = decls;
16084 : 250707082 : decls = decl;
16085 : 250707082 : result = tree_cons (init, type, result);
16086 : : }
16087 : 166159995 : decls = nreverse (decls);
16088 : 166159995 : result = nreverse (result);
16089 : 166159995 : if (parm)
16090 : 164840912 : result = chainon (result, void_list_node);
16091 : 166159995 : *parms = decls;
16092 : 166159995 : if (any_error)
16093 : 138 : result = NULL_TREE;
16094 : :
16095 : 138 : if (any_error)
16096 : : /* We had parm errors, recover by giving the function (...) type. */
16097 : 138 : result = NULL_TREE;
16098 : :
16099 : 166159995 : return result;
16100 : : }
16101 : :
16102 : :
16103 : : /* D is a constructor or overloaded `operator='.
16104 : :
16105 : : Let T be the class in which D is declared. Then, this function
16106 : : returns:
16107 : :
16108 : : -1 if D's is an ill-formed constructor or copy assignment operator
16109 : : whose first parameter is of type `T'.
16110 : : 0 if D is not a copy constructor or copy assignment
16111 : : operator.
16112 : : 1 if D is a copy constructor or copy assignment operator whose
16113 : : first parameter is a reference to non-const qualified T.
16114 : : 2 if D is a copy constructor or copy assignment operator whose
16115 : : first parameter is a reference to const qualified T.
16116 : :
16117 : : This function can be used as a predicate. Positive values indicate
16118 : : a copy constructor and nonzero values indicate a copy assignment
16119 : : operator. */
16120 : :
16121 : : int
16122 : 265337993 : copy_fn_p (const_tree d)
16123 : : {
16124 : 265337993 : tree args;
16125 : 265337993 : tree arg_type;
16126 : 265337993 : int result = 1;
16127 : :
16128 : 265337993 : gcc_assert (DECL_FUNCTION_MEMBER_P (d));
16129 : :
16130 : 265337993 : if (TREE_CODE (d) == TEMPLATE_DECL
16131 : 265337993 : || (DECL_TEMPLATE_INFO (d)
16132 : 124627545 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
16133 : : /* Instantiations of template member functions are never copy
16134 : : functions. Note that member functions of templated classes are
16135 : : represented as template functions internally, and we must
16136 : : accept those as copy functions. */
16137 : : return 0;
16138 : :
16139 : 220689715 : if (!DECL_CONSTRUCTOR_P (d)
16140 : 220689715 : && DECL_NAME (d) != assign_op_identifier)
16141 : : return 0;
16142 : :
16143 : 219957139 : if (DECL_XOBJ_MEMBER_FUNCTION_P (d))
16144 : : {
16145 : 154 : tree object_param = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (d)));
16146 : 154 : if (!TYPE_REF_P (object_param)
16147 : 148 : || TYPE_REF_IS_RVALUE (object_param)
16148 : : /* Reject unrelated object parameters. */
16149 : 136 : || TYPE_MAIN_VARIANT (TREE_TYPE (object_param)) != DECL_CONTEXT (d)
16150 : 290 : || CP_TYPE_CONST_P (TREE_TYPE (object_param)))
16151 : 24 : return 0;
16152 : 130 : args = TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (d)));
16153 : : }
16154 : : else
16155 : 219956985 : args = FUNCTION_FIRST_USER_PARMTYPE (d);
16156 : 219957115 : if (!args)
16157 : : return 0;
16158 : :
16159 : 219949719 : arg_type = TREE_VALUE (args);
16160 : 219949719 : if (arg_type == error_mark_node)
16161 : : return 0;
16162 : :
16163 : 219949684 : if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
16164 : : {
16165 : : /* Pass by value copy assignment operator. */
16166 : : result = -1;
16167 : : }
16168 : 219947919 : else if (TYPE_REF_P (arg_type)
16169 : 135757006 : && !TYPE_REF_IS_RVALUE (arg_type)
16170 : 307030842 : && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
16171 : : {
16172 : 67776949 : if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
16173 : 67719299 : result = 2;
16174 : : }
16175 : : else
16176 : : return 0;
16177 : :
16178 : 67778714 : args = TREE_CHAIN (args);
16179 : :
16180 : 70250974 : if (args && args != void_list_node && !TREE_PURPOSE (args))
16181 : : /* There are more non-optional args. */
16182 : : return 0;
16183 : :
16184 : : return result;
16185 : : }
16186 : :
16187 : : /* D is a constructor or overloaded `operator='.
16188 : :
16189 : : Let T be the class in which D is declared. Then, this function
16190 : : returns true when D is a move constructor or move assignment
16191 : : operator, false otherwise. */
16192 : :
16193 : : bool
16194 : 107896639 : move_fn_p (const_tree d)
16195 : : {
16196 : 107896639 : if (cxx_dialect == cxx98)
16197 : : /* There are no move constructors if we are in C++98 mode. */
16198 : : return false;
16199 : :
16200 : 107833028 : if (TREE_CODE (d) == TEMPLATE_DECL
16201 : 107833028 : || (DECL_TEMPLATE_INFO (d)
16202 : 45964759 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
16203 : : /* Instantiations of template member functions are never move
16204 : : functions. Note that member functions of templated classes are
16205 : : represented as template functions internally, and we must
16206 : : accept those as move functions. */
16207 : : return 0;
16208 : :
16209 : 86458313 : return move_signature_fn_p (d);
16210 : : }
16211 : :
16212 : : /* D is a constructor or overloaded `operator='.
16213 : :
16214 : : Then, this function returns true when D has the same signature as a move
16215 : : constructor or move assignment operator (because either it is such a
16216 : : ctor/op= or it is a template specialization with the same signature),
16217 : : false otherwise. */
16218 : :
16219 : : bool
16220 : 86458313 : move_signature_fn_p (const_tree d)
16221 : : {
16222 : 86458313 : tree args;
16223 : 86458313 : tree arg_type;
16224 : 86458313 : bool result = false;
16225 : :
16226 : 86458313 : if (!DECL_CONSTRUCTOR_P (d)
16227 : 86458313 : && DECL_NAME (d) != assign_op_identifier)
16228 : : return 0;
16229 : :
16230 : 86458256 : if (DECL_XOBJ_MEMBER_FUNCTION_P (d))
16231 : : {
16232 : 88 : tree object_param = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (d)));
16233 : 88 : if (!TYPE_REF_P (object_param)
16234 : 84 : || TYPE_REF_IS_RVALUE (object_param)
16235 : : /* Reject unrelated object parameters. */
16236 : 76 : || TYPE_MAIN_VARIANT (TREE_TYPE (object_param)) != DECL_CONTEXT (d)
16237 : 164 : || CP_TYPE_CONST_P (TREE_TYPE (object_param)))
16238 : 16 : return 0;
16239 : 72 : args = TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (d)));
16240 : : }
16241 : : else
16242 : 86458168 : args = FUNCTION_FIRST_USER_PARMTYPE (d);
16243 : 86458240 : if (!args)
16244 : : return 0;
16245 : :
16246 : 86455524 : arg_type = TREE_VALUE (args);
16247 : 86455524 : if (arg_type == error_mark_node)
16248 : : return 0;
16249 : :
16250 : 86455516 : if (TYPE_REF_P (arg_type)
16251 : 43250263 : && TYPE_REF_IS_RVALUE (arg_type)
16252 : 119951403 : && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
16253 : : DECL_CONTEXT (d)))
16254 : : result = true;
16255 : :
16256 : 86455516 : args = TREE_CHAIN (args);
16257 : :
16258 : 95850320 : if (args && args != void_list_node && !TREE_PURPOSE (args))
16259 : : /* There are more non-optional args. */
16260 : : return false;
16261 : :
16262 : : return result;
16263 : : }
16264 : :
16265 : : /* Remember any special properties of member function DECL. */
16266 : :
16267 : : void
16268 : 272163208 : grok_special_member_properties (tree decl)
16269 : : {
16270 : 272163208 : tree class_type;
16271 : :
16272 : 272163208 : if (TREE_CODE (decl) == USING_DECL
16273 : 272163208 : || !DECL_OBJECT_MEMBER_FUNCTION_P (decl))
16274 : : return;
16275 : :
16276 : 255586183 : class_type = DECL_CONTEXT (decl);
16277 : 255586183 : if (IDENTIFIER_CTOR_P (DECL_NAME (decl)))
16278 : : {
16279 : 112230141 : int ctor = copy_fn_p (decl);
16280 : :
16281 : 112230141 : if (!DECL_ARTIFICIAL (decl))
16282 : 84630174 : TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
16283 : :
16284 : 112230141 : if (ctor > 0)
16285 : : {
16286 : : /* [class.copy]
16287 : :
16288 : : A non-template constructor for class X is a copy
16289 : : constructor if its first parameter is of type X&, const
16290 : : X&, volatile X& or const volatile X&, and either there
16291 : : are no other parameters or else all other parameters have
16292 : : default arguments. */
16293 : 21978260 : TYPE_HAS_COPY_CTOR (class_type) = 1;
16294 : 21978260 : if (ctor > 1)
16295 : 21964733 : TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
16296 : : }
16297 : :
16298 : 112230141 : if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
16299 : 23496458 : TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
16300 : :
16301 : 112230141 : if (is_list_ctor (decl))
16302 : 1340097 : TYPE_HAS_LIST_CTOR (class_type) = 1;
16303 : :
16304 : 112230141 : if (maybe_constexpr_fn (decl)
16305 : 112230141 : && !ctor && !move_fn_p (decl))
16306 : 26616551 : TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
16307 : : }
16308 : 143356042 : else if (DECL_NAME (decl) == assign_op_identifier)
16309 : : {
16310 : : /* [class.copy]
16311 : :
16312 : : A non-template assignment operator for class X is a copy
16313 : : assignment operator if its parameter is of type X, X&, const
16314 : : X&, volatile X& or const volatile X&. */
16315 : :
16316 : 12344305 : int assop = copy_fn_p (decl);
16317 : :
16318 : 12344305 : if (assop)
16319 : : {
16320 : 6169456 : TYPE_HAS_COPY_ASSIGN (class_type) = 1;
16321 : 6169456 : if (assop != 1)
16322 : 6140750 : TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
16323 : : }
16324 : : }
16325 : 131011737 : else if (IDENTIFIER_CONV_OP_P (DECL_NAME (decl)))
16326 : 1783503 : TYPE_HAS_CONVERSION (class_type) = true;
16327 : :
16328 : : /* Destructors are handled in check_methods. */
16329 : : }
16330 : :
16331 : : /* Check a constructor DECL has the correct form. Complains
16332 : : if the class has a constructor of the form X(X). */
16333 : :
16334 : : bool
16335 : 39581809 : grok_ctor_properties (const_tree ctype, const_tree decl)
16336 : : {
16337 : 39581809 : int ctor_parm = copy_fn_p (decl);
16338 : :
16339 : 39581809 : if (ctor_parm < 0)
16340 : : {
16341 : : /* [class.copy]
16342 : :
16343 : : A declaration of a constructor for a class X is ill-formed if
16344 : : its first parameter is of type (optionally cv-qualified) X
16345 : : and either there are no other parameters or else all other
16346 : : parameters have default arguments.
16347 : :
16348 : : We *don't* complain about member template instantiations that
16349 : : have this form, though; they can occur as we try to decide
16350 : : what constructor to use during overload resolution. Since
16351 : : overload resolution will never prefer such a constructor to
16352 : : the non-template copy constructor (which is either explicitly
16353 : : or implicitly defined), there's no need to worry about their
16354 : : existence. Theoretically, they should never even be
16355 : : instantiated, but that's hard to forestall. */
16356 : 9 : error_at (DECL_SOURCE_LOCATION (decl),
16357 : : "invalid constructor; you probably meant %<%T (const %T&)%>",
16358 : : ctype, ctype);
16359 : 9 : return false;
16360 : : }
16361 : :
16362 : : return true;
16363 : : }
16364 : :
16365 : : /* DECL is a declaration for an overloaded or conversion operator. If
16366 : : COMPLAIN is true, errors are issued for invalid declarations. */
16367 : :
16368 : : bool
16369 : 47594994 : grok_op_properties (tree decl, bool complain)
16370 : : {
16371 : 47594994 : tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
16372 : 47594994 : bool const methodp = DECL_IOBJ_MEMBER_FUNCTION_P (decl);
16373 : 47594994 : tree name = DECL_NAME (decl);
16374 : 47594994 : location_t loc = DECL_SOURCE_LOCATION (decl);
16375 : :
16376 : 47594994 : tree class_type = DECL_CONTEXT (decl);
16377 : 47594994 : if (class_type && !CLASS_TYPE_P (class_type))
16378 : : class_type = NULL_TREE;
16379 : :
16380 : 47594994 : tree_code operator_code;
16381 : 47594994 : unsigned op_flags;
16382 : 47594994 : if (IDENTIFIER_CONV_OP_P (name))
16383 : : {
16384 : : /* Conversion operators are TYPE_EXPR for the purposes of this
16385 : : function. */
16386 : : operator_code = TYPE_EXPR;
16387 : : op_flags = OVL_OP_FLAG_UNARY;
16388 : : }
16389 : : else
16390 : : {
16391 : 46121111 : const ovl_op_info_t *ovl_op = IDENTIFIER_OVL_OP_INFO (name);
16392 : :
16393 : 46121111 : operator_code = ovl_op->tree_code;
16394 : 46121111 : op_flags = ovl_op->flags;
16395 : 46121111 : gcc_checking_assert (operator_code != ERROR_MARK);
16396 : 46121111 : DECL_OVERLOADED_OPERATOR_CODE_RAW (decl) = ovl_op->ovl_op_code;
16397 : : }
16398 : :
16399 : 46121111 : if (op_flags & OVL_OP_FLAG_ALLOC)
16400 : : {
16401 : : /* operator new and operator delete are quite special. */
16402 : 313607 : if (class_type)
16403 : 11220 : switch (op_flags)
16404 : : {
16405 : 7878 : case OVL_OP_FLAG_ALLOC:
16406 : 7878 : TYPE_HAS_NEW_OPERATOR (class_type) = 1;
16407 : 7878 : break;
16408 : :
16409 : 3075 : case OVL_OP_FLAG_ALLOC | OVL_OP_FLAG_DELETE:
16410 : 3075 : TYPE_GETS_DELETE (class_type) |= 1;
16411 : 3075 : break;
16412 : :
16413 : 130 : case OVL_OP_FLAG_ALLOC | OVL_OP_FLAG_VEC:
16414 : 130 : TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
16415 : 130 : break;
16416 : :
16417 : 137 : case OVL_OP_FLAG_ALLOC | OVL_OP_FLAG_DELETE | OVL_OP_FLAG_VEC:
16418 : 137 : TYPE_GETS_DELETE (class_type) |= 2;
16419 : 137 : break;
16420 : :
16421 : 0 : default:
16422 : 0 : gcc_unreachable ();
16423 : : }
16424 : :
16425 : : /* [basic.std.dynamic.allocation]/1:
16426 : :
16427 : : A program is ill-formed if an allocation function is declared
16428 : : in a namespace scope other than global scope or declared
16429 : : static in global scope.
16430 : :
16431 : : The same also holds true for deallocation functions. */
16432 : 313607 : if (DECL_NAMESPACE_SCOPE_P (decl))
16433 : : {
16434 : 302387 : if (CP_DECL_CONTEXT (decl) != global_namespace)
16435 : : {
16436 : 6 : error_at (loc, "%qD may not be declared within a namespace",
16437 : : decl);
16438 : 6 : return false;
16439 : : }
16440 : :
16441 : 302381 : if (!TREE_PUBLIC (decl))
16442 : : {
16443 : 6 : error_at (loc, "%qD may not be declared as static", decl);
16444 : 6 : return false;
16445 : : }
16446 : : }
16447 : :
16448 : : /* Check for replaceable global new/delete operators with
16449 : : const std::nothrow_t & last argument, other replaceable global
16450 : : new/delete operators are marked in cxx_init_decl_processing. */
16451 : 313595 : if (CP_DECL_CONTEXT (decl) == global_namespace)
16452 : : {
16453 : 302375 : tree args = argtypes;
16454 : 302375 : if (args
16455 : 302363 : && args != void_list_node
16456 : 907083 : && same_type_p (TREE_VALUE (args),
16457 : : (op_flags & OVL_OP_FLAG_DELETE)
16458 : : ? ptr_type_node : size_type_node))
16459 : : {
16460 : 302333 : args = TREE_CHAIN (args);
16461 : 302333 : if (aligned_allocation_fn_p (decl))
16462 : 97348 : args = TREE_CHAIN (args);
16463 : 302333 : if (args
16464 : 302327 : && args != void_list_node
16465 : 504132 : && TREE_CHAIN (args) == void_list_node)
16466 : : {
16467 : 177418 : tree t = TREE_VALUE (args);
16468 : 177418 : if (TYPE_REF_P (t)
16469 : 100634 : && !TYPE_REF_IS_RVALUE (t)
16470 : 100634 : && (t = TREE_TYPE (t))
16471 : 100634 : && TYPE_QUALS (t) == TYPE_QUAL_CONST
16472 : 277604 : && is_std_class (t, "nothrow_t"))
16473 : 100186 : DECL_IS_REPLACEABLE_OPERATOR (decl) = 1;
16474 : : }
16475 : : }
16476 : : }
16477 : :
16478 : 313595 : if (op_flags & OVL_OP_FLAG_DELETE)
16479 : : {
16480 : 178158 : DECL_SET_IS_OPERATOR_DELETE (decl, true);
16481 : 178158 : coerce_delete_type (decl, loc);
16482 : : }
16483 : : else
16484 : : {
16485 : 135437 : DECL_SET_IS_OPERATOR_NEW (decl, true);
16486 : 135437 : TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl), loc);
16487 : : }
16488 : :
16489 : 313595 : return true;
16490 : : }
16491 : :
16492 : : /* An operator function must either be a non-static member function
16493 : : or have at least one parameter of a class, a reference to a class,
16494 : : an enumeration, or a reference to an enumeration. 13.4.0.6 */
16495 : 47281387 : if (!DECL_OBJECT_MEMBER_FUNCTION_P (decl))
16496 : : {
16497 : 13219066 : if (operator_code == TYPE_EXPR
16498 : 13219066 : || operator_code == COMPONENT_REF
16499 : 13219045 : || operator_code == NOP_EXPR)
16500 : : {
16501 : 30 : error_at (loc, "%qD must be a non-static member function", decl);
16502 : 30 : return false;
16503 : : }
16504 : :
16505 : 13219036 : if (operator_code == CALL_EXPR || operator_code == ARRAY_REF)
16506 : : {
16507 : 102 : if (! DECL_STATIC_FUNCTION_P (decl))
16508 : : {
16509 : 12 : error_at (loc, "%qD must be a member function", decl);
16510 : 12 : return false;
16511 : : }
16512 : 90 : if (cxx_dialect < cxx23
16513 : : /* For lambdas we diagnose static lambda specifier elsewhere. */
16514 : 95 : && (operator_code == ARRAY_REF || ! LAMBDA_FUNCTION_P (decl))
16515 : : /* For instantiations, we have diagnosed this already. */
16516 : 122 : && ! DECL_USE_TEMPLATE (decl))
16517 : 26 : pedwarn (loc, OPT_Wc__23_extensions, "%qD may be a static member "
16518 : : "function only with %<-std=c++23%> or %<-std=gnu++23%>",
16519 : : decl);
16520 : 90 : if (operator_code == ARRAY_REF)
16521 : : /* static operator[] should have exactly one argument
16522 : : for C++20 and earlier, so that it isn't multidimensional. */
16523 : : op_flags = OVL_OP_FLAG_UNARY;
16524 : : }
16525 : 13218934 : else if (DECL_STATIC_FUNCTION_P (decl))
16526 : : {
16527 : 9 : error_at (loc, "%qD must be either a non-static member "
16528 : : "function or a non-member function", decl);
16529 : 9 : return false;
16530 : : }
16531 : : else
16532 : 413054 : for (tree arg = argtypes; ; arg = TREE_CHAIN (arg))
16533 : : {
16534 : 13631979 : if (!arg || arg == void_list_node)
16535 : : {
16536 : 18 : if (complain)
16537 : 15 : error_at (loc, "%qD must have an argument of class or "
16538 : : "enumerated type", decl);
16539 : 18 : return false;
16540 : : }
16541 : :
16542 : 13631961 : tree type = non_reference (TREE_VALUE (arg));
16543 : 13631961 : if (type == error_mark_node)
16544 : : return false;
16545 : :
16546 : : /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
16547 : : because these checks are performed even on template
16548 : : functions. */
16549 : 13631958 : if (MAYBE_CLASS_TYPE_P (type)
16550 : 1319971 : || TREE_CODE (type) == ENUMERAL_TYPE)
16551 : : break;
16552 : 413054 : }
16553 : : }
16554 : :
16555 : 47281279 : if (operator_code == CALL_EXPR)
16556 : : /* There are no further restrictions on the arguments to an overloaded
16557 : : "operator ()". */
16558 : : return true;
16559 : :
16560 : : /* C++23 allows an arbitrary number of parameters and default arguments for
16561 : : operator[], and none of the other checks below apply. */
16562 : 41689204 : if (operator_code == ARRAY_REF && cxx_dialect >= cxx23)
16563 : : return true;
16564 : :
16565 : 41425333 : if (operator_code == COND_EXPR)
16566 : : {
16567 : : /* 13.4.0.3 */
16568 : 6 : error_at (loc, "ISO C++ prohibits overloading %<operator ?:%>");
16569 : 6 : return false;
16570 : : }
16571 : :
16572 : : /* Count the number of arguments and check for ellipsis. */
16573 : : int arity = 0;
16574 : 118552965 : for (tree arg = argtypes; arg != void_list_node; arg = TREE_CHAIN (arg))
16575 : : {
16576 : 77127653 : if (!arg)
16577 : : {
16578 : 15 : error_at (loc, "%qD must not have variable number of arguments",
16579 : : decl);
16580 : 15 : return false;
16581 : : }
16582 : 77127638 : ++arity;
16583 : : }
16584 : : /* FIXME: We need tests for these errors with xobj member functions. */
16585 : : /* Verify correct number of arguments. */
16586 : 41425312 : switch (op_flags)
16587 : : {
16588 : 7295264 : case OVL_OP_FLAG_AMBIARY:
16589 : 7295264 : if (arity == 1)
16590 : : {
16591 : : /* We have a unary instance of an ambi-ary op. Remap to the
16592 : : unary one. */
16593 : 3323180 : unsigned alt = ovl_op_alternate[ovl_op_mapping [operator_code]];
16594 : 3323180 : const ovl_op_info_t *ovl_op = &ovl_op_info[false][alt];
16595 : 3323180 : gcc_checking_assert (ovl_op->flags == OVL_OP_FLAG_UNARY);
16596 : 3323180 : operator_code = ovl_op->tree_code;
16597 : 3323180 : DECL_OVERLOADED_OPERATOR_CODE_RAW (decl) = ovl_op->ovl_op_code;
16598 : : }
16599 : 3972084 : else if (arity != 2)
16600 : : {
16601 : : /* This was an ambiguous operator but is invalid. */
16602 : 3 : error_at (loc,
16603 : : methodp
16604 : : ? G_("%qD must have either zero or one argument")
16605 : : : G_("%qD must have either one or two arguments"), decl);
16606 : 3 : return false;
16607 : : }
16608 : 3972081 : else if ((operator_code == POSTINCREMENT_EXPR
16609 : 3972081 : || operator_code == POSTDECREMENT_EXPR)
16610 : 2025552 : && ! processing_template_decl
16611 : : /* x++ and x--'s second argument must be an int. */
16612 : 5347046 : && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)),
16613 : : integer_type_node))
16614 : : {
16615 : 15 : error_at (loc,
16616 : : methodp
16617 : : ? G_("postfix %qD must have %<int%> as its argument")
16618 : : : G_("postfix %qD must have %<int%> as its second argument"),
16619 : : decl);
16620 : 15 : return false;
16621 : : }
16622 : : break;
16623 : :
16624 : 2399836 : case OVL_OP_FLAG_UNARY:
16625 : 2399836 : if (arity != 1)
16626 : : {
16627 : 12 : error_at (loc,
16628 : : methodp
16629 : : ? G_("%qD must have no arguments")
16630 : : : G_("%qD must have exactly one argument"), decl);
16631 : 12 : return false;
16632 : : }
16633 : : break;
16634 : :
16635 : 31730212 : case OVL_OP_FLAG_BINARY:
16636 : 31730212 : if (arity != 2)
16637 : : {
16638 : 3 : error_at (loc,
16639 : : methodp
16640 : : ? G_("%qD must have exactly one argument")
16641 : : : G_("%qD must have exactly two arguments"), decl);
16642 : 3 : return false;
16643 : : }
16644 : : break;
16645 : :
16646 : 0 : default:
16647 : 0 : gcc_unreachable ();
16648 : : }
16649 : :
16650 : : /* There can be no default arguments. */
16651 : 118552818 : for (tree arg = argtypes; arg && arg != void_list_node;
16652 : 77127539 : arg = TREE_CHAIN (arg))
16653 : 77127554 : if (TREE_PURPOSE (arg))
16654 : : {
16655 : 15 : TREE_PURPOSE (arg) = NULL_TREE;
16656 : 15 : error_at (loc, "%qD cannot have default arguments", decl);
16657 : 15 : return false;
16658 : : }
16659 : :
16660 : : /* At this point the declaration is well-formed. It may not be
16661 : : sensible though. */
16662 : :
16663 : : /* Check member function warnings only on the in-class declaration.
16664 : : There's no point warning on an out-of-class definition. */
16665 : 41425264 : if (class_type && class_type != current_class_type)
16666 : : return true;
16667 : :
16668 : : /* Warn about conversion operators that will never be used. */
16669 : 39548926 : if (IDENTIFIER_CONV_OP_P (name)
16670 : 1473473 : && ! DECL_TEMPLATE_INFO (decl)
16671 : 40131788 : && warn_class_conversion)
16672 : : {
16673 : 582829 : tree t = TREE_TYPE (name);
16674 : 582829 : int ref = TYPE_REF_P (t);
16675 : :
16676 : 582829 : if (ref)
16677 : 22309 : t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
16678 : :
16679 : 582829 : if (VOID_TYPE_P (t))
16680 : 9 : warning_at (loc, OPT_Wclass_conversion, "converting %qT to %<void%> "
16681 : : "will never use a type conversion operator", class_type);
16682 : 582820 : else if (class_type)
16683 : : {
16684 : 582820 : if (same_type_ignoring_top_level_qualifiers_p (t, class_type))
16685 : 24 : warning_at (loc, OPT_Wclass_conversion,
16686 : : ref
16687 : : ? G_("converting %qT to a reference to the same type "
16688 : : "will never use a type conversion operator")
16689 : : : G_("converting %qT to the same type "
16690 : : "will never use a type conversion operator"),
16691 : : class_type);
16692 : : /* Don't force t to be complete here. */
16693 : 582805 : else if (MAYBE_CLASS_TYPE_P (t)
16694 : 255763 : && COMPLETE_TYPE_P (t)
16695 : 52587 : && DERIVED_FROM_P (t, class_type))
16696 : 30 : warning_at (loc, OPT_Wclass_conversion,
16697 : : ref
16698 : : ? G_("converting %qT to a reference to a base class "
16699 : : "%qT will never use a type conversion operator")
16700 : : : G_("converting %qT to a base class %qT "
16701 : : "will never use a type conversion operator"),
16702 : : class_type, t);
16703 : : }
16704 : : }
16705 : :
16706 : 39548926 : if (!warn_ecpp)
16707 : : return true;
16708 : :
16709 : : /* Effective C++ rules below. */
16710 : :
16711 : : /* More Effective C++ rule 7. */
16712 : 54 : if (operator_code == TRUTH_ANDIF_EXPR
16713 : 54 : || operator_code == TRUTH_ORIF_EXPR
16714 : 54 : || operator_code == COMPOUND_EXPR)
16715 : 0 : warning_at (loc, OPT_Weffc__,
16716 : : "user-defined %qD always evaluates both arguments", decl);
16717 : :
16718 : : /* More Effective C++ rule 6. */
16719 : 54 : if (operator_code == POSTINCREMENT_EXPR
16720 : : || operator_code == POSTDECREMENT_EXPR
16721 : : || operator_code == PREINCREMENT_EXPR
16722 : 54 : || operator_code == PREDECREMENT_EXPR)
16723 : : {
16724 : 0 : tree arg = TREE_VALUE (argtypes);
16725 : 0 : tree ret = TREE_TYPE (TREE_TYPE (decl));
16726 : 0 : if (methodp || TYPE_REF_P (arg))
16727 : 0 : arg = TREE_TYPE (arg);
16728 : 0 : arg = TYPE_MAIN_VARIANT (arg);
16729 : :
16730 : 0 : if (operator_code == PREINCREMENT_EXPR
16731 : : || operator_code == PREDECREMENT_EXPR)
16732 : : {
16733 : 0 : if (!TYPE_REF_P (ret)
16734 : 0 : || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)), arg))
16735 : 0 : warning_at (loc, OPT_Weffc__, "prefix %qD should return %qT", decl,
16736 : : build_reference_type (arg));
16737 : : }
16738 : : else
16739 : : {
16740 : 0 : if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
16741 : 0 : warning_at (loc, OPT_Weffc__,
16742 : : "postfix %qD should return %qT", decl, arg);
16743 : : }
16744 : : }
16745 : :
16746 : : /* Effective C++ rule 23. */
16747 : 54 : if (!DECL_ASSIGNMENT_OPERATOR_P (decl)
16748 : : && (operator_code == PLUS_EXPR
16749 : 9 : || operator_code == MINUS_EXPR
16750 : 9 : || operator_code == TRUNC_DIV_EXPR
16751 : : || operator_code == MULT_EXPR
16752 : : || operator_code == TRUNC_MOD_EXPR)
16753 : 60 : && TYPE_REF_P (TREE_TYPE (TREE_TYPE (decl))))
16754 : 3 : warning_at (loc, OPT_Weffc__, "%qD should return by value", decl);
16755 : :
16756 : : return true;
16757 : : }
16758 : :
16759 : : /* Return a string giving the keyword associate with CODE. */
16760 : :
16761 : : static const char *
16762 : 111 : tag_name (enum tag_types code)
16763 : : {
16764 : 111 : switch (code)
16765 : : {
16766 : : case record_type:
16767 : : return "struct";
16768 : 60 : case class_type:
16769 : 60 : return "class";
16770 : 0 : case union_type:
16771 : 0 : return "union";
16772 : 3 : case enum_type:
16773 : 3 : return "enum";
16774 : 0 : case typename_type:
16775 : 0 : return "typename";
16776 : 0 : default:
16777 : 0 : gcc_unreachable ();
16778 : : }
16779 : : }
16780 : :
16781 : : /* Name lookup in an elaborated-type-specifier (after the keyword
16782 : : indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
16783 : : elaborated-type-specifier is invalid, issue a diagnostic and return
16784 : : error_mark_node; otherwise, return the *_TYPE to which it referred.
16785 : : If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
16786 : :
16787 : : tree
16788 : 10782997 : check_elaborated_type_specifier (enum tag_types tag_code,
16789 : : tree decl,
16790 : : bool allow_template_p)
16791 : : {
16792 : 10782997 : tree type;
16793 : :
16794 : : /* In the case of:
16795 : :
16796 : : struct S { struct S *p; };
16797 : :
16798 : : name lookup will find the TYPE_DECL for the implicit "S::S"
16799 : : typedef. Adjust for that here. */
16800 : 10782997 : if (DECL_SELF_REFERENCE_P (decl))
16801 : 310240 : decl = TYPE_NAME (TREE_TYPE (decl));
16802 : :
16803 : 10782997 : type = TREE_TYPE (decl);
16804 : :
16805 : : /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
16806 : : is false for this case as well. */
16807 : 10782997 : if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
16808 : : {
16809 : 9 : error ("using template type parameter %qT after %qs",
16810 : : type, tag_name (tag_code));
16811 : 9 : return error_mark_node;
16812 : : }
16813 : : /* Accept template template parameters. */
16814 : 10782988 : else if (allow_template_p
16815 : 6160434 : && (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM
16816 : 6160422 : || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM))
16817 : : ;
16818 : : /* [dcl.type.elab]
16819 : :
16820 : : If the identifier resolves to a typedef-name or the
16821 : : simple-template-id resolves to an alias template
16822 : : specialization, the elaborated-type-specifier is ill-formed.
16823 : :
16824 : : In other words, the only legitimate declaration to use in the
16825 : : elaborated type specifier is the implicit typedef created when
16826 : : the type is declared. */
16827 : 10782973 : else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
16828 : 310347 : && !DECL_SELF_REFERENCE_P (decl)
16829 : 10783080 : && tag_code != typename_type)
16830 : : {
16831 : 78 : auto_diagnostic_group d;
16832 : 78 : if (alias_template_specialization_p (type, nt_opaque))
16833 : 21 : error ("using alias template specialization %qT after %qs",
16834 : : type, tag_name (tag_code));
16835 : : else
16836 : 57 : error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
16837 : 78 : inform (DECL_SOURCE_LOCATION (decl),
16838 : : "%qD has a previous declaration here", decl);
16839 : 78 : return error_mark_node;
16840 : 78 : }
16841 : 10782895 : else if (TREE_CODE (type) != RECORD_TYPE
16842 : 10782895 : && TREE_CODE (type) != UNION_TYPE
16843 : : && tag_code != enum_type
16844 : 61715 : && tag_code != typename_type)
16845 : : {
16846 : 6 : auto_diagnostic_group d;
16847 : 6 : error ("%qT referred to as %qs", type, tag_name (tag_code));
16848 : 6 : inform (location_of (type), "%qT has a previous declaration here", type);
16849 : 6 : return error_mark_node;
16850 : 6 : }
16851 : 10782889 : else if (TREE_CODE (type) != ENUMERAL_TYPE
16852 : 10721206 : && tag_code == enum_type)
16853 : : {
16854 : 3 : auto_diagnostic_group d;
16855 : 3 : error ("%qT referred to as enum", type);
16856 : 3 : inform (location_of (type), "%qT has a previous declaration here", type);
16857 : 3 : return error_mark_node;
16858 : 3 : }
16859 : 10782886 : else if (!allow_template_p
16860 : 4622494 : && TREE_CODE (type) == RECORD_TYPE
16861 : 15291844 : && CLASSTYPE_IS_TEMPLATE (type))
16862 : : {
16863 : : /* If a class template appears as elaborated type specifier
16864 : : without a template header such as:
16865 : :
16866 : : template <class T> class C {};
16867 : : void f(class C); // No template header here
16868 : :
16869 : : then the required template argument is missing. */
16870 : 18 : error ("template argument required for %<%s %T%>",
16871 : : tag_name (tag_code),
16872 : 18 : DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
16873 : 18 : return error_mark_node;
16874 : : }
16875 : :
16876 : : return type;
16877 : : }
16878 : :
16879 : : /* Lookup NAME of an elaborated type specifier according to SCOPE and
16880 : : issue diagnostics if necessary. Return *_TYPE node upon success,
16881 : : NULL_TREE when the NAME is not found, and ERROR_MARK_NODE for type
16882 : : error. */
16883 : :
16884 : : static tree
16885 : 21125768 : lookup_and_check_tag (enum tag_types tag_code, tree name,
16886 : : TAG_how how, bool template_header_p)
16887 : : {
16888 : 21125768 : tree decl;
16889 : 21125768 : if (how == TAG_how::GLOBAL)
16890 : : {
16891 : : /* First try ordinary name lookup, ignoring hidden class name
16892 : : injected via friend declaration. */
16893 : 1816517 : decl = lookup_name (name, LOOK_want::TYPE);
16894 : : /* If that fails, the name will be placed in the smallest
16895 : : non-class, non-function-prototype scope according to 3.3.1/5.
16896 : : We may already have a hidden name declared as friend in this
16897 : : scope. So lookup again but not ignoring hidden names.
16898 : : If we find one, that name will be made visible rather than
16899 : : creating a new tag. */
16900 : 1816517 : if (!decl)
16901 : 17593 : decl = lookup_elaborated_type (name, TAG_how::INNERMOST_NON_CLASS);
16902 : : }
16903 : : else
16904 : 19309251 : decl = lookup_elaborated_type (name, how);
16905 : :
16906 : 19326844 : if (!decl)
16907 : : /* We found nothing. */
16908 : : return NULL_TREE;
16909 : :
16910 : 4712677 : if (TREE_CODE (decl) == TREE_LIST)
16911 : : {
16912 : 3 : auto_diagnostic_group d;
16913 : 3 : error ("reference to %qD is ambiguous", name);
16914 : 3 : print_candidates (decl);
16915 : 3 : return error_mark_node;
16916 : 3 : }
16917 : :
16918 : 1962377 : if (DECL_CLASS_TEMPLATE_P (decl)
16919 : 1962371 : && !template_header_p
16920 : 6675045 : && how == TAG_how::CURRENT_ONLY)
16921 : : {
16922 : 12 : auto_diagnostic_group d;
16923 : 12 : error ("class template %qD redeclared as non-template", name);
16924 : 12 : inform (location_of (decl), "previous declaration here");
16925 : 12 : CLASSTYPE_ERRONEOUS (TREE_TYPE (decl)) = true;
16926 : 12 : return error_mark_node;
16927 : 12 : }
16928 : :
16929 : 1962365 : if (DECL_CLASS_TEMPLATE_P (decl)
16930 : : /* If scope is TAG_how::CURRENT_ONLY we're defining a class,
16931 : : so ignore a template template parameter. */
16932 : 4712668 : || (how != TAG_how::CURRENT_ONLY && DECL_TEMPLATE_TEMPLATE_PARM_P (decl)))
16933 : 1962362 : decl = DECL_TEMPLATE_RESULT (decl);
16934 : :
16935 : 4712662 : if (TREE_CODE (decl) != TYPE_DECL)
16936 : : /* Found not-a-type. */
16937 : : return NULL_TREE;
16938 : :
16939 : : /* Look for invalid nested type:
16940 : : class C {
16941 : : class C {};
16942 : : }; */
16943 : 4712641 : if (how == TAG_how::CURRENT_ONLY && DECL_SELF_REFERENCE_P (decl))
16944 : : {
16945 : 6 : error ("%qD has the same name as the class in which it is "
16946 : : "declared", decl);
16947 : 6 : return error_mark_node;
16948 : : }
16949 : :
16950 : : /* Two cases we need to consider when deciding if a class
16951 : : template is allowed as an elaborated type specifier:
16952 : : 1. It is a self reference to its own class.
16953 : : 2. It comes with a template header.
16954 : :
16955 : : For example:
16956 : :
16957 : : template <class T> class C {
16958 : : class C *c1; // DECL_SELF_REFERENCE_P is true
16959 : : class D;
16960 : : };
16961 : : template <class U> class C; // template_header_p is true
16962 : : template <class T> class C<T>::D {
16963 : : class C *c2; // DECL_SELF_REFERENCE_P is true
16964 : : }; */
16965 : :
16966 : 14137905 : tree t = check_elaborated_type_specifier (tag_code, decl,
16967 : : template_header_p
16968 : 9115045 : | DECL_SELF_REFERENCE_P (decl));
16969 : 2071280 : if (template_header_p && t && CLASS_TYPE_P (t)
16970 : 6783897 : && (!CLASSTYPE_TEMPLATE_INFO (t)
16971 : 2071244 : || (!PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))))
16972 : : {
16973 : 21 : auto_diagnostic_group d;
16974 : 21 : error ("%qT is not a template", t);
16975 : 21 : inform (location_of (t), "previous declaration here");
16976 : 42 : if (TYPE_CLASS_SCOPE_P (t)
16977 : 24 : && CLASSTYPE_TEMPLATE_INFO (TYPE_CONTEXT (t)))
16978 : 3 : inform (input_location,
16979 : : "perhaps you want to explicitly add %<%T::%>",
16980 : 3 : TYPE_CONTEXT (t));
16981 : 21 : return error_mark_node;
16982 : 21 : }
16983 : :
16984 : : return t;
16985 : : }
16986 : :
16987 : : /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
16988 : : Define the tag as a forward-reference if it is not defined.
16989 : :
16990 : : If a declaration is given, process it here, and report an error if
16991 : : multiple declarations are not identical.
16992 : :
16993 : : SCOPE is TS_CURRENT when this is also a definition. Only look in
16994 : : the current frame for the name (since C++ allows new names in any
16995 : : scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
16996 : : declaration. Only look beginning from the current scope outward up
16997 : : till the nearest non-class scope. Otherwise it is TS_GLOBAL.
16998 : :
16999 : : TEMPLATE_HEADER_P is true when this declaration is preceded by
17000 : : a set of template parameters. */
17001 : :
17002 : : tree
17003 : 20519612 : xref_tag (enum tag_types tag_code, tree name,
17004 : : TAG_how how, bool template_header_p)
17005 : : {
17006 : 20519612 : enum tree_code code;
17007 : 20519612 : tree context = NULL_TREE;
17008 : :
17009 : 20519612 : auto_cond_timevar tv (TV_NAME_LOOKUP);
17010 : :
17011 : 20519612 : gcc_assert (identifier_p (name));
17012 : :
17013 : 20519612 : switch (tag_code)
17014 : : {
17015 : : case record_type:
17016 : : case class_type:
17017 : : code = RECORD_TYPE;
17018 : : break;
17019 : : case union_type:
17020 : : code = UNION_TYPE;
17021 : : break;
17022 : : case enum_type:
17023 : : code = ENUMERAL_TYPE;
17024 : : break;
17025 : 0 : default:
17026 : 0 : gcc_unreachable ();
17027 : : }
17028 : :
17029 : : /* In case of anonymous name, xref_tag is only called to
17030 : : make type node and push name. Name lookup is not required. */
17031 : 20519612 : tree t = NULL_TREE;
17032 : 20519612 : if (!IDENTIFIER_ANON_P (name))
17033 : 19143959 : t = lookup_and_check_tag (tag_code, name, how, template_header_p);
17034 : :
17035 : 20519612 : if (t == error_mark_node)
17036 : : return error_mark_node;
17037 : :
17038 : 2366872 : if (how != TAG_how::CURRENT_ONLY && t && current_class_type
17039 : 1021540 : && template_class_depth (current_class_type)
17040 : 20896121 : && template_header_p)
17041 : : {
17042 : 258457 : if (TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM)
17043 : : return t;
17044 : :
17045 : : /* Since HOW is not TAG_how::CURRENT_ONLY, we are not looking at
17046 : : a definition of this tag. Since, in addition, we are
17047 : : currently processing a (member) template declaration of a
17048 : : template class, we must be very careful; consider:
17049 : :
17050 : : template <class X> struct S1
17051 : :
17052 : : template <class U> struct S2
17053 : : {
17054 : : template <class V> friend struct S1;
17055 : : };
17056 : :
17057 : : Here, the S2::S1 declaration should not be confused with the
17058 : : outer declaration. In particular, the inner version should
17059 : : have a template parameter of level 2, not level 1.
17060 : :
17061 : : On the other hand, when presented with:
17062 : :
17063 : : template <class T> struct S1
17064 : : {
17065 : : template <class U> struct S2 {};
17066 : : template <class U> friend struct S2;
17067 : : };
17068 : :
17069 : : the friend must find S1::S2 eventually. We accomplish this
17070 : : by making sure that the new type we create to represent this
17071 : : declaration has the right TYPE_CONTEXT. */
17072 : 258454 : context = TYPE_CONTEXT (t);
17073 : 258454 : t = NULL_TREE;
17074 : : }
17075 : :
17076 : 20519498 : if (! t)
17077 : : {
17078 : : /* If no such tag is yet defined, create a forward-reference node
17079 : : and record it as the "definition".
17080 : : When a real declaration of this type is found,
17081 : : the forward-reference will be altered into a real type. */
17082 : 16098673 : if (code == ENUMERAL_TYPE)
17083 : : {
17084 : 14 : error ("use of enum %q#D without previous declaration", name);
17085 : 14 : return error_mark_node;
17086 : : }
17087 : :
17088 : 16098659 : t = make_class_type (code);
17089 : 16098659 : TYPE_CONTEXT (t) = context;
17090 : 16098659 : if (IDENTIFIER_LAMBDA_P (name))
17091 : : /* Mark it as a lambda type right now. Our caller will
17092 : : correct the value. */
17093 : 754054 : CLASSTYPE_LAMBDA_EXPR (t) = error_mark_node;
17094 : 16098659 : t = pushtag (name, t, how);
17095 : : }
17096 : : else
17097 : : {
17098 : 4420825 : if (template_header_p && MAYBE_CLASS_TYPE_P (t))
17099 : : {
17100 : : /* Check that we aren't trying to overload a class with different
17101 : : constraints. */
17102 : 1812787 : if (!redeclare_class_template (t, current_template_parms,
17103 : : current_template_constraints ()))
17104 : 60 : return error_mark_node;
17105 : : }
17106 : 2608038 : else if (!processing_template_decl
17107 : 2468131 : && CLASS_TYPE_P (t)
17108 : 5050178 : && CLASSTYPE_IS_TEMPLATE (t))
17109 : : {
17110 : 0 : auto_diagnostic_group d;
17111 : 0 : error ("redeclaration of %qT as a non-template", t);
17112 : 0 : inform (location_of (t), "previous declaration %qD", t);
17113 : 0 : return error_mark_node;
17114 : 0 : }
17115 : :
17116 : 4420765 : if (modules_p ()
17117 : 4420765 : && how == TAG_how::CURRENT_ONLY)
17118 : : {
17119 : 13491 : tree decl = TYPE_NAME (t);
17120 : 13491 : if (!module_may_redeclare (decl))
17121 : 15 : return error_mark_node;
17122 : :
17123 : 13476 : tree not_tmpl = STRIP_TEMPLATE (decl);
17124 : 13476 : if (DECL_LANG_SPECIFIC (not_tmpl)
17125 : 6839 : && DECL_MODULE_ATTACH_P (not_tmpl)
17126 : 36 : && !DECL_MODULE_EXPORT_P (not_tmpl)
17127 : 13506 : && module_exporting_p ())
17128 : : {
17129 : 6 : auto_diagnostic_group d;
17130 : 6 : error ("conflicting exporting for declaration %qD", decl);
17131 : 6 : inform (DECL_SOURCE_LOCATION (decl),
17132 : : "previously declared here without exporting");
17133 : 6 : }
17134 : :
17135 : 13476 : tree maybe_tmpl = decl;
17136 : 13476 : if (CLASS_TYPE_P (t) && CLASSTYPE_IS_TEMPLATE (t))
17137 : 9919 : maybe_tmpl = CLASSTYPE_TI_TEMPLATE (t);
17138 : :
17139 : : /* FIXME: we should do a more precise check for redefinitions
17140 : : of a conflicting using-declaration here, as these diagnostics
17141 : : are not ideal. */
17142 : 13476 : if (DECL_LANG_SPECIFIC (decl)
17143 : 6839 : && DECL_MODULE_IMPORT_P (decl)
17144 : 13518 : && CP_DECL_CONTEXT (decl) == current_namespace)
17145 : : {
17146 : : /* Push it into this TU's symbol slot. */
17147 : 39 : if (maybe_tmpl != decl)
17148 : : /* We're in the template parm binding level.
17149 : : Pushtag has logic to slide under that, but we're
17150 : : not pushing a *new* type. */
17151 : 15 : push_nested_namespace (CP_DECL_CONTEXT (decl));
17152 : :
17153 : 39 : pushdecl (maybe_tmpl);
17154 : 39 : if (maybe_tmpl != decl)
17155 : 15 : pop_nested_namespace (CP_DECL_CONTEXT (decl));
17156 : : }
17157 : :
17158 : 13476 : set_instantiating_module (maybe_tmpl);
17159 : : }
17160 : : }
17161 : :
17162 : : return t;
17163 : 20519612 : }
17164 : :
17165 : : /* Create the binfo hierarchy for REF with (possibly NULL) base list
17166 : : BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
17167 : : access_* node, and the TREE_VALUE is the type of the base-class.
17168 : : Non-NULL TREE_TYPE indicates virtual inheritance. */
17169 : :
17170 : : void
17171 : 51174482 : xref_basetypes (tree ref, tree base_list)
17172 : : {
17173 : 51174482 : tree *basep;
17174 : 51174482 : tree binfo, base_binfo;
17175 : 51174482 : unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
17176 : 51174482 : unsigned max_bases = 0; /* Maximum direct bases. */
17177 : 51174482 : unsigned max_dvbases = 0; /* Maximum direct virtual bases. */
17178 : 51174482 : int i;
17179 : 51174482 : tree default_access;
17180 : 51174482 : tree igo_prev; /* Track Inheritance Graph Order. */
17181 : :
17182 : 51174482 : if (ref == error_mark_node)
17183 : 12 : return;
17184 : :
17185 : : /* The base of a derived class is private by default, all others are
17186 : : public. */
17187 : 102348964 : default_access = (TREE_CODE (ref) == RECORD_TYPE
17188 : 50681820 : && CLASSTYPE_DECLARED_CLASS (ref)
17189 : 101856302 : ? access_private_node : access_public_node);
17190 : :
17191 : : /* First, make sure that any templates in base-classes are
17192 : : instantiated. This ensures that if we call ourselves recursively
17193 : : we do not get confused about which classes are marked and which
17194 : : are not. */
17195 : 51174482 : basep = &base_list;
17196 : 78056883 : while (*basep)
17197 : : {
17198 : 26882401 : tree basetype = TREE_VALUE (*basep);
17199 : :
17200 : : /* The dependent_type_p call below should really be dependent_scope_p
17201 : : so that we give a hard error about using an incomplete type as a
17202 : : base, but we allow it with a pedwarn for backward
17203 : : compatibility. */
17204 : 26882401 : if (processing_template_decl
17205 : 26882401 : && CLASS_TYPE_P (basetype) && TYPE_BEING_DEFINED (basetype))
17206 : 3 : cxx_incomplete_type_diagnostic (NULL_TREE, basetype, DK_PEDWARN);
17207 : 26882401 : if (!dependent_type_p (basetype)
17208 : 26882401 : && !complete_type_or_else (basetype, NULL))
17209 : : /* An incomplete type. Remove it from the list. */
17210 : 15 : *basep = TREE_CHAIN (*basep);
17211 : : else
17212 : : {
17213 : 26882386 : max_bases++;
17214 : 26882386 : if (TREE_TYPE (*basep))
17215 : 67564 : max_dvbases++;
17216 : 26882386 : if (CLASS_TYPE_P (basetype))
17217 : 25992285 : max_vbases += vec_safe_length (CLASSTYPE_VBASECLASSES (basetype));
17218 : 26882386 : basep = &TREE_CHAIN (*basep);
17219 : : }
17220 : : }
17221 : 51174482 : max_vbases += max_dvbases;
17222 : :
17223 : 51174482 : TYPE_MARKED_P (ref) = 1;
17224 : :
17225 : : /* The binfo slot should be empty, unless this is an (ill-formed)
17226 : : redefinition. */
17227 : 51174482 : gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
17228 : :
17229 : 51174482 : gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
17230 : :
17231 : 51174482 : binfo = make_tree_binfo (max_bases);
17232 : :
17233 : 51174482 : TYPE_BINFO (ref) = binfo;
17234 : 51174482 : BINFO_OFFSET (binfo) = size_zero_node;
17235 : 51174482 : BINFO_TYPE (binfo) = ref;
17236 : :
17237 : : /* Apply base-class info set up to the variants of this type. */
17238 : 51174482 : fixup_type_variants (ref);
17239 : :
17240 : 51174482 : if (max_bases)
17241 : : {
17242 : 26032310 : vec_alloc (BINFO_BASE_ACCESSES (binfo), max_bases);
17243 : : /* A C++98 POD cannot have base classes. */
17244 : 26032310 : CLASSTYPE_NON_LAYOUT_POD_P (ref) = true;
17245 : :
17246 : 26032310 : if (TREE_CODE (ref) == UNION_TYPE)
17247 : : {
17248 : 12 : error ("derived union %qT invalid", ref);
17249 : 12 : return;
17250 : : }
17251 : : }
17252 : :
17253 : 26032298 : if (max_bases > 1)
17254 : 659961 : warning (OPT_Wmultiple_inheritance,
17255 : : "%qT defined with multiple direct bases", ref);
17256 : :
17257 : 51174470 : if (max_vbases)
17258 : : {
17259 : : /* An aggregate can't have virtual base classes. */
17260 : 204644 : CLASSTYPE_NON_AGGREGATE (ref) = true;
17261 : :
17262 : 204644 : vec_alloc (CLASSTYPE_VBASECLASSES (ref), max_vbases);
17263 : :
17264 : 204644 : if (max_dvbases)
17265 : 66564 : warning (OPT_Wvirtual_inheritance,
17266 : : "%qT defined with direct virtual base", ref);
17267 : : }
17268 : :
17269 : 78056844 : for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
17270 : : {
17271 : 26882374 : tree access = TREE_PURPOSE (base_list);
17272 : 26882374 : int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
17273 : 26882374 : tree basetype = TREE_VALUE (base_list);
17274 : :
17275 : 26882374 : if (access == access_default_node)
17276 : 4299126 : access = default_access;
17277 : :
17278 : : /* Before C++17, an aggregate cannot have base classes. In C++17, an
17279 : : aggregate can't have virtual, private, or protected base classes. */
17280 : 26882374 : if (cxx_dialect < cxx17
17281 : 26671124 : || access != access_public_node
17282 : 25774065 : || via_virtual)
17283 : 1173090 : CLASSTYPE_NON_AGGREGATE (ref) = true;
17284 : :
17285 : 26882374 : if (PACK_EXPANSION_P (basetype))
17286 : 19206 : basetype = PACK_EXPANSION_PATTERN (basetype);
17287 : 26882374 : if (TREE_CODE (basetype) == TYPE_DECL)
17288 : 0 : basetype = TREE_TYPE (basetype);
17289 : 26882374 : if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
17290 : : {
17291 : 24 : error ("base type %qT fails to be a struct or class type",
17292 : : basetype);
17293 : 24 : goto dropped_base;
17294 : : }
17295 : :
17296 : 26882350 : base_binfo = NULL_TREE;
17297 : 26882350 : if (CLASS_TYPE_P (basetype) && !dependent_scope_p (basetype))
17298 : : {
17299 : 20519799 : base_binfo = TYPE_BINFO (basetype);
17300 : : /* The original basetype could have been a typedef'd type. */
17301 : 20519799 : basetype = BINFO_TYPE (base_binfo);
17302 : :
17303 : : /* Inherit flags from the base. */
17304 : 61559397 : TYPE_HAS_NEW_OPERATOR (ref)
17305 : 20519799 : |= TYPE_HAS_NEW_OPERATOR (basetype);
17306 : 61559397 : TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
17307 : 20519799 : |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
17308 : 20519799 : TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
17309 : 20519799 : TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
17310 : 61559397 : CLASSTYPE_DIAMOND_SHAPED_P (ref)
17311 : 20519799 : |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
17312 : 61559397 : CLASSTYPE_REPEATED_BASE_P (ref)
17313 : 20519799 : |= CLASSTYPE_REPEATED_BASE_P (basetype);
17314 : : }
17315 : :
17316 : : /* We must do this test after we've seen through a typedef
17317 : : type. */
17318 : 26882350 : if (TYPE_MARKED_P (basetype))
17319 : : {
17320 : 18 : if (basetype == ref)
17321 : 0 : error ("recursive type %qT undefined", basetype);
17322 : : else
17323 : 18 : error ("duplicate base type %qT invalid", basetype);
17324 : 18 : goto dropped_base;
17325 : : }
17326 : :
17327 : 26882332 : if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
17328 : : /* Regenerate the pack expansion for the bases. */
17329 : 19206 : basetype = make_pack_expansion (basetype);
17330 : :
17331 : 26882332 : TYPE_MARKED_P (basetype) = 1;
17332 : :
17333 : 26882332 : base_binfo = copy_binfo (base_binfo, basetype, ref,
17334 : : &igo_prev, via_virtual);
17335 : 26882332 : if (!BINFO_INHERITANCE_CHAIN (base_binfo))
17336 : 26814783 : BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
17337 : :
17338 : 26882332 : BINFO_BASE_APPEND (binfo, base_binfo);
17339 : 26882332 : BINFO_BASE_ACCESS_APPEND (binfo, access);
17340 : 26882332 : continue;
17341 : :
17342 : 42 : dropped_base:
17343 : : /* Update max_vbases to reflect the reality that we are dropping
17344 : : this base: if it reaches zero we want to undo the vec_alloc
17345 : : above to avoid inconsistencies during error-recovery: eg, in
17346 : : build_special_member_call, CLASSTYPE_VBASECLASSES non null
17347 : : and vtt null (c++/27952). */
17348 : 42 : if (via_virtual)
17349 : 12 : max_vbases--;
17350 : 42 : if (CLASS_TYPE_P (basetype))
17351 : 30 : max_vbases
17352 : 33 : -= vec_safe_length (CLASSTYPE_VBASECLASSES (basetype));
17353 : 26882332 : }
17354 : :
17355 : 51174470 : if (CLASSTYPE_VBASECLASSES (ref)
17356 : 51174470 : && max_vbases == 0)
17357 : 24 : vec_free (CLASSTYPE_VBASECLASSES (ref));
17358 : :
17359 : 51379102 : if (vec_safe_length (CLASSTYPE_VBASECLASSES (ref)) < max_vbases)
17360 : : /* If we didn't get max_vbases vbases, we must have shared at
17361 : : least one of them, and are therefore diamond shaped. */
17362 : 21872 : CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
17363 : :
17364 : : /* Unmark all the types. */
17365 : 78056802 : for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
17366 : 26882332 : TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
17367 : 51174470 : TYPE_MARKED_P (ref) = 0;
17368 : :
17369 : : /* Now see if we have a repeated base type. */
17370 : 51174470 : if (!CLASSTYPE_REPEATED_BASE_P (ref))
17371 : : {
17372 : 132649205 : for (base_binfo = binfo; base_binfo;
17373 : 81475167 : base_binfo = TREE_CHAIN (base_binfo))
17374 : : {
17375 : 81475877 : if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
17376 : : {
17377 : 710 : CLASSTYPE_REPEATED_BASE_P (ref) = 1;
17378 : 710 : break;
17379 : : }
17380 : 81475167 : TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
17381 : : }
17382 : 132649205 : for (base_binfo = binfo; base_binfo;
17383 : 81475167 : base_binfo = TREE_CHAIN (base_binfo))
17384 : 81475877 : if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
17385 : 81475167 : TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
17386 : : else
17387 : : break;
17388 : : }
17389 : : }
17390 : :
17391 : :
17392 : : /* Copies the enum-related properties from type SRC to type DST.
17393 : : Used with the underlying type of an enum and the enum itself. */
17394 : : static void
17395 : 1671473 : copy_type_enum (tree dst, tree src)
17396 : : {
17397 : 1671473 : tree t;
17398 : 3342952 : for (t = dst; t; t = TYPE_NEXT_VARIANT (t))
17399 : : {
17400 : 1671479 : TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (src);
17401 : 1671479 : TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (src);
17402 : 1671479 : TYPE_SIZE (t) = TYPE_SIZE (src);
17403 : 1671479 : TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (src);
17404 : 1671479 : SET_TYPE_MODE (dst, TYPE_MODE (src));
17405 : 1671479 : TYPE_PRECISION (t) = TYPE_PRECISION (src);
17406 : 1671479 : unsigned valign = TYPE_ALIGN (src);
17407 : 1671479 : if (TYPE_USER_ALIGN (t))
17408 : 12 : valign = MAX (valign, TYPE_ALIGN (t));
17409 : : else
17410 : 1671467 : TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (src);
17411 : 1671479 : SET_TYPE_ALIGN (t, valign);
17412 : 1671479 : TYPE_UNSIGNED (t) = TYPE_UNSIGNED (src);
17413 : : }
17414 : 1671473 : }
17415 : :
17416 : : /* Begin compiling the definition of an enumeration type.
17417 : : NAME is its name,
17418 : :
17419 : : if ENUMTYPE is not NULL_TREE then the type has alredy been found.
17420 : :
17421 : : UNDERLYING_TYPE is the type that will be used as the storage for
17422 : : the enumeration type. This should be NULL_TREE if no storage type
17423 : : was specified.
17424 : :
17425 : : ATTRIBUTES are any attributes specified after the enum-key.
17426 : :
17427 : : SCOPED_ENUM_P is true if this is a scoped enumeration type.
17428 : :
17429 : : if IS_NEW is not NULL, gets TRUE iff a new type is created.
17430 : :
17431 : : Returns the type object, as yet incomplete.
17432 : : Also records info about it so that build_enumerator
17433 : : may be used to declare the individual values as they are read. */
17434 : :
17435 : : tree
17436 : 1981939 : start_enum (tree name, tree enumtype, tree underlying_type,
17437 : : tree attributes, bool scoped_enum_p, bool *is_new)
17438 : : {
17439 : 1981939 : tree prevtype = NULL_TREE;
17440 : 1981939 : gcc_assert (identifier_p (name));
17441 : :
17442 : 1981939 : if (is_new)
17443 : 1583588 : *is_new = false;
17444 : : /* [C++0x dcl.enum]p5:
17445 : :
17446 : : If not explicitly specified, the underlying type of a scoped
17447 : : enumeration type is int. */
17448 : 1981939 : if (!underlying_type && scoped_enum_p)
17449 : 110237 : underlying_type = integer_type_node;
17450 : :
17451 : 1981939 : if (underlying_type)
17452 : 400281 : underlying_type = cv_unqualified (underlying_type);
17453 : :
17454 : : /* If this is the real definition for a previous forward reference,
17455 : : fill in the contents in the same object that used to be the
17456 : : forward reference. */
17457 : 1981939 : if (!enumtype)
17458 : 1981809 : enumtype = lookup_and_check_tag (enum_type, name,
17459 : : /*tag_scope=*/TAG_how::CURRENT_ONLY,
17460 : : /*template_header_p=*/false);
17461 : :
17462 : : /* In case of a template_decl, the only check that should be deferred
17463 : : to instantiation time is the comparison of underlying types. */
17464 : 1981939 : if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
17465 : : {
17466 : : /* Attempt to set the declaring module. */
17467 : 33390 : if (modules_p ())
17468 : : {
17469 : 238 : tree decl = TYPE_NAME (enumtype);
17470 : 238 : if (!module_may_redeclare (decl))
17471 : 3 : enumtype = error_mark_node;
17472 : : else
17473 : 235 : set_instantiating_module (decl);
17474 : : }
17475 : :
17476 : 33390 : if (enumtype == error_mark_node)
17477 : : ;
17478 : 33577 : else if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
17479 : : {
17480 : 6 : auto_diagnostic_group d;
17481 : 6 : error_at (input_location, "scoped/unscoped mismatch "
17482 : : "in enum %q#T", enumtype);
17483 : 6 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
17484 : : "previous definition here");
17485 : 6 : enumtype = error_mark_node;
17486 : 6 : }
17487 : 33381 : else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
17488 : : {
17489 : 0 : auto_diagnostic_group d;
17490 : 0 : error_at (input_location, "underlying type mismatch "
17491 : : "in enum %q#T", enumtype);
17492 : 0 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
17493 : : "previous definition here");
17494 : 0 : enumtype = error_mark_node;
17495 : 0 : }
17496 : 33365 : else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
17497 : 66746 : && !same_type_p (underlying_type,
17498 : : ENUM_UNDERLYING_TYPE (enumtype)))
17499 : : {
17500 : 26 : auto_diagnostic_group d;
17501 : 26 : error_at (input_location, "different underlying type "
17502 : : "in enum %q#T", enumtype);
17503 : 26 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
17504 : : "previous definition here");
17505 : 26 : underlying_type = NULL_TREE;
17506 : 26 : }
17507 : : }
17508 : :
17509 : 1981939 : if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
17510 : 33381 : || processing_template_decl)
17511 : : {
17512 : : /* In case of error, make a dummy enum to allow parsing to
17513 : : continue. */
17514 : 1948646 : if (enumtype == error_mark_node)
17515 : : {
17516 : 9 : name = make_anon_name ();
17517 : 9 : enumtype = NULL_TREE;
17518 : : }
17519 : :
17520 : : /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
17521 : : of an opaque enum, or an opaque enum of an already defined
17522 : : enumeration (C++11).
17523 : : In any other case, it'll be NULL_TREE. */
17524 : 1948646 : if (!enumtype)
17525 : : {
17526 : 1948555 : if (is_new)
17527 : 1550207 : *is_new = true;
17528 : : }
17529 : 1948646 : prevtype = enumtype;
17530 : :
17531 : : /* Do not push the decl more than once. */
17532 : 1948646 : if (!enumtype
17533 : 91 : || TREE_CODE (enumtype) != ENUMERAL_TYPE)
17534 : : {
17535 : 1948558 : enumtype = cxx_make_type (ENUMERAL_TYPE);
17536 : 1948558 : enumtype = pushtag (name, enumtype);
17537 : :
17538 : 1948558 : if (enumtype != error_mark_node)
17539 : : {
17540 : : /* The enum is considered opaque until the opening '{' of the
17541 : : enumerator list. */
17542 : 1948540 : SET_OPAQUE_ENUM_P (enumtype, true);
17543 : 1948540 : ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
17544 : :
17545 : : /* std::byte aliases anything. */
17546 : 1948540 : if (TYPE_CONTEXT (enumtype) == std_node
17547 : 2256007 : && !strcmp ("byte", TYPE_NAME_STRING (enumtype)))
17548 : 12303 : TYPE_ALIAS_SET (enumtype) = 0;
17549 : : }
17550 : : }
17551 : : else
17552 : 88 : enumtype = xref_tag (enum_type, name);
17553 : :
17554 : 1948646 : if (enumtype == error_mark_node)
17555 : : return error_mark_node;
17556 : : }
17557 : :
17558 : 1981921 : SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
17559 : :
17560 : 1981921 : cplus_decl_attributes (&enumtype, attributes, (int)ATTR_FLAG_TYPE_IN_PLACE);
17561 : :
17562 : 1981921 : if (underlying_type)
17563 : : {
17564 : 400252 : if (ENUM_UNDERLYING_TYPE (enumtype))
17565 : : /* We already checked that it matches, don't change it to a different
17566 : : typedef variant. */;
17567 : 366913 : else if (CP_INTEGRAL_TYPE_P (underlying_type))
17568 : : {
17569 : 366849 : copy_type_enum (enumtype, underlying_type);
17570 : 366849 : ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
17571 : : }
17572 : 64 : else if (dependent_type_p (underlying_type))
17573 : 51 : ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
17574 : : else
17575 : : {
17576 : 13 : error ("underlying type %qT of %qT must be an integral type",
17577 : : underlying_type, enumtype);
17578 : 13 : ENUM_UNDERLYING_TYPE (enumtype) = integer_type_node;
17579 : : }
17580 : : }
17581 : :
17582 : : /* If into a template class, the returned enum is always the first
17583 : : declaration (opaque or not) seen. This way all the references to
17584 : : this type will be to the same declaration. The following ones are used
17585 : : only to check for definition errors. */
17586 : 1981921 : if (prevtype && processing_template_decl)
17587 : : return prevtype;
17588 : : else
17589 : 1981833 : return enumtype;
17590 : : }
17591 : :
17592 : : /* After processing and defining all the values of an enumeration type,
17593 : : install their decls in the enumeration type.
17594 : : ENUMTYPE is the type object. */
17595 : :
17596 : : void
17597 : 1886588 : finish_enum_value_list (tree enumtype)
17598 : : {
17599 : 1886588 : tree values;
17600 : 1886588 : tree underlying_type;
17601 : 1886588 : tree decl;
17602 : 1886588 : tree value;
17603 : 1886588 : tree minnode, maxnode;
17604 : 1886588 : tree t;
17605 : :
17606 : 1886588 : bool fixed_underlying_type_p
17607 : 1886588 : = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
17608 : :
17609 : : /* We built up the VALUES in reverse order. */
17610 : 1886588 : TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
17611 : :
17612 : : /* For an enum defined in a template, just set the type of the values;
17613 : : all further processing is postponed until the template is
17614 : : instantiated. We need to set the type so that tsubst of a CONST_DECL
17615 : : works. */
17616 : 1886588 : if (processing_template_decl)
17617 : : {
17618 : 344824 : for (values = TYPE_VALUES (enumtype);
17619 : 640500 : values;
17620 : 344824 : values = TREE_CHAIN (values))
17621 : 344824 : TREE_TYPE (TREE_VALUE (values)) = enumtype;
17622 : : return;
17623 : : }
17624 : :
17625 : : /* Determine the minimum and maximum values of the enumerators. */
17626 : 1590912 : if (TYPE_VALUES (enumtype))
17627 : : {
17628 : : minnode = maxnode = NULL_TREE;
17629 : :
17630 : 10103871 : for (values = TYPE_VALUES (enumtype);
17631 : 11668012 : values;
17632 : 10103871 : values = TREE_CHAIN (values))
17633 : : {
17634 : 10103871 : decl = TREE_VALUE (values);
17635 : :
17636 : : /* [dcl.enum]: Following the closing brace of an enum-specifier,
17637 : : each enumerator has the type of its enumeration. Prior to the
17638 : : closing brace, the type of each enumerator is the type of its
17639 : : initializing value. */
17640 : 10103871 : TREE_TYPE (decl) = enumtype;
17641 : :
17642 : : /* Update the minimum and maximum values, if appropriate. */
17643 : 10103871 : value = DECL_INITIAL (decl);
17644 : 10103871 : if (TREE_CODE (value) != INTEGER_CST)
17645 : 4 : value = integer_zero_node;
17646 : : /* Figure out what the minimum and maximum values of the
17647 : : enumerators are. */
17648 : 10103871 : if (!minnode)
17649 : : minnode = maxnode = value;
17650 : 8539730 : else if (tree_int_cst_lt (maxnode, value))
17651 : : maxnode = value;
17652 : 1307241 : else if (tree_int_cst_lt (value, minnode))
17653 : 139170 : minnode = value;
17654 : : }
17655 : : }
17656 : : else
17657 : : /* [dcl.enum]
17658 : :
17659 : : If the enumerator-list is empty, the underlying type is as if
17660 : : the enumeration had a single enumerator with value 0. */
17661 : 26771 : minnode = maxnode = integer_zero_node;
17662 : :
17663 : 1590912 : if (!fixed_underlying_type_p)
17664 : : {
17665 : : /* Compute the number of bits require to represent all values of the
17666 : : enumeration. We must do this before the type of MINNODE and
17667 : : MAXNODE are transformed, since tree_int_cst_min_precision relies
17668 : : on the TREE_TYPE of the value it is passed. */
17669 : 1304624 : signop sgn = tree_int_cst_sgn (minnode) >= 0 ? UNSIGNED : SIGNED;
17670 : 1304624 : int lowprec = tree_int_cst_min_precision (minnode, sgn);
17671 : 1304624 : int highprec = tree_int_cst_min_precision (maxnode, sgn);
17672 : 1304624 : int precision = MAX (lowprec, highprec);
17673 : 1304624 : unsigned int itk;
17674 : 1304624 : bool use_short_enum;
17675 : :
17676 : : /* Determine the underlying type of the enumeration.
17677 : :
17678 : : [dcl.enum]
17679 : :
17680 : : The underlying type of an enumeration is an integral type that
17681 : : can represent all the enumerator values defined in the
17682 : : enumeration. It is implementation-defined which integral type is
17683 : : used as the underlying type for an enumeration except that the
17684 : : underlying type shall not be larger than int unless the value of
17685 : : an enumerator cannot fit in an int or unsigned int.
17686 : :
17687 : : We use "int" or an "unsigned int" as the underlying type, even if
17688 : : a smaller integral type would work, unless the user has
17689 : : explicitly requested that we use the smallest possible type. The
17690 : : user can request that for all enumerations with a command line
17691 : : flag, or for just one enumeration with an attribute. */
17692 : :
17693 : 2609248 : use_short_enum = flag_short_enums
17694 : 1304624 : || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
17695 : :
17696 : : /* If the precision of the type was specified with an attribute and it
17697 : : was too small, give an error. Otherwise, use it. */
17698 : 1304624 : if (TYPE_PRECISION (enumtype))
17699 : : {
17700 : 11 : if (precision > TYPE_PRECISION (enumtype))
17701 : 0 : error ("specified mode too small for enumerated values");
17702 : : else
17703 : : {
17704 : 11 : use_short_enum = true;
17705 : 11 : precision = TYPE_PRECISION (enumtype);
17706 : : }
17707 : : }
17708 : :
17709 : 3839675 : for (itk = (use_short_enum ? itk_char : itk_int);
17710 : 2535130 : itk != itk_none;
17711 : : itk++)
17712 : : {
17713 : 2535127 : underlying_type = integer_types[itk];
17714 : 2535127 : if (underlying_type != NULL_TREE
17715 : 2535109 : && TYPE_PRECISION (underlying_type) >= precision
17716 : 5068453 : && TYPE_SIGN (underlying_type) == sgn)
17717 : : break;
17718 : : }
17719 : 1304624 : if (itk == itk_none)
17720 : : {
17721 : : /* DR 377
17722 : :
17723 : : IF no integral type can represent all the enumerator values, the
17724 : : enumeration is ill-formed. */
17725 : 3 : error ("no integral type can represent all of the enumerator values "
17726 : : "for %qT", enumtype);
17727 : 3 : precision = TYPE_PRECISION (long_long_integer_type_node);
17728 : 3 : underlying_type = integer_types[itk_unsigned_long_long];
17729 : : }
17730 : :
17731 : : /* [dcl.enum]
17732 : :
17733 : : The value of sizeof() applied to an enumeration type, an object
17734 : : of an enumeration type, or an enumerator, is the value of sizeof()
17735 : : applied to the underlying type. */
17736 : 1304624 : copy_type_enum (enumtype, underlying_type);
17737 : :
17738 : : /* Compute the minimum and maximum values for the type.
17739 : :
17740 : : [dcl.enum]
17741 : :
17742 : : For an enumeration where emin is the smallest enumerator and emax
17743 : : is the largest, the values of the enumeration are the values of the
17744 : : underlying type in the range bmin to bmax, where bmin and bmax are,
17745 : : respectively, the smallest and largest values of the smallest bit-
17746 : : field that can store emin and emax. */
17747 : :
17748 : : /* The middle-end currently assumes that types with TYPE_PRECISION
17749 : : narrower than their underlying type are suitably zero or sign
17750 : : extended to fill their mode. Similarly, it assumes that the front
17751 : : end assures that a value of a particular type must be within
17752 : : TYPE_MIN_VALUE and TYPE_MAX_VALUE.
17753 : :
17754 : : We used to set these fields based on bmin and bmax, but that led
17755 : : to invalid assumptions like optimizing away bounds checking. So
17756 : : now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
17757 : : TYPE_MAX_VALUE to the values for the mode above and only restrict
17758 : : the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
17759 : 1304624 : ENUM_UNDERLYING_TYPE (enumtype)
17760 : 1304624 : = build_distinct_type_copy (underlying_type);
17761 : 1304624 : TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
17762 : 1304624 : set_min_and_max_values_for_integral_type
17763 : 1304624 : (ENUM_UNDERLYING_TYPE (enumtype), precision, sgn);
17764 : :
17765 : : /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
17766 : 1304624 : if (flag_strict_enums)
17767 : 35 : set_min_and_max_values_for_integral_type (enumtype, precision, sgn);
17768 : :
17769 : 1304624 : if (use_short_enum)
17770 : : {
17771 : 79 : TYPE_PACKED (enumtype) = use_short_enum;
17772 : 79 : fixup_attribute_variants (enumtype);
17773 : : }
17774 : : }
17775 : : else
17776 : 286288 : underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
17777 : :
17778 : : /* If the enum is exported, mark the consts too. */
17779 : 1590912 : bool export_p = (UNSCOPED_ENUM_P (enumtype)
17780 : 1371650 : && DECL_MODULE_EXPORT_P (TYPE_STUB_DECL (enumtype))
17781 : 1591924 : && at_namespace_scope_p ());
17782 : :
17783 : : /* Convert each of the enumerators to the type of the underlying
17784 : : type of the enumeration. */
17785 : 11694783 : for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
17786 : : {
17787 : 10103871 : decl = TREE_VALUE (values);
17788 : 10103871 : iloc_sentinel ils (DECL_SOURCE_LOCATION (decl));
17789 : 10103871 : if (fixed_underlying_type_p)
17790 : : /* If the enumeration type has a fixed underlying type, we
17791 : : already checked all of the enumerator values. */
17792 : 2771448 : value = DECL_INITIAL (decl);
17793 : : else
17794 : 7332423 : value = perform_implicit_conversion (underlying_type,
17795 : 7332423 : DECL_INITIAL (decl),
17796 : : tf_warning_or_error);
17797 : : /* Do not clobber shared ints. */
17798 : 10103871 : if (value != error_mark_node)
17799 : : {
17800 : 10103869 : value = copy_node (value);
17801 : :
17802 : 10103869 : TREE_TYPE (value) = enumtype;
17803 : : }
17804 : 10103871 : DECL_INITIAL (decl) = value;
17805 : 10103871 : if (export_p)
17806 : 9646 : DECL_MODULE_EXPORT_P (decl) = true;
17807 : 10103871 : }
17808 : :
17809 : : /* Fix up all variant types of this enum type. */
17810 : 3181830 : for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
17811 : 1590918 : TYPE_VALUES (t) = TYPE_VALUES (enumtype);
17812 : :
17813 : 1590912 : if (at_class_scope_p ()
17814 : 875884 : && COMPLETE_TYPE_P (current_class_type)
17815 : 1590972 : && UNSCOPED_ENUM_P (enumtype))
17816 : : {
17817 : 42 : insert_late_enum_def_bindings (current_class_type, enumtype);
17818 : : /* TYPE_FIELDS needs fixup. */
17819 : 42 : fixup_type_variants (current_class_type);
17820 : : }
17821 : :
17822 : : /* Finish debugging output for this type. */
17823 : 1590912 : rest_of_type_compilation (enumtype, namespace_bindings_p ());
17824 : :
17825 : : /* Each enumerator now has the type of its enumeration. Clear the cache
17826 : : so that this change in types doesn't confuse us later on. */
17827 : 1590912 : clear_cv_and_fold_caches ();
17828 : : }
17829 : :
17830 : : /* Finishes the enum type. This is called only the first time an
17831 : : enumeration is seen, be it opaque or odinary.
17832 : : ENUMTYPE is the type object. */
17833 : :
17834 : : void
17835 : 1876691 : finish_enum (tree enumtype)
17836 : : {
17837 : 1876691 : if (processing_template_decl)
17838 : : {
17839 : 295704 : if (at_function_scope_p ())
17840 : 2214 : add_stmt (build_min (TAG_DEFN, enumtype));
17841 : 295704 : return;
17842 : : }
17843 : :
17844 : : /* If this is a forward declaration, there should not be any variants,
17845 : : though we can get a variant in the middle of an enum-specifier with
17846 : : wacky code like 'enum E { e = sizeof(const E*) };' */
17847 : 3161974 : gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
17848 : : && (TYPE_VALUES (enumtype)
17849 : : || !TYPE_NEXT_VARIANT (enumtype)));
17850 : : }
17851 : :
17852 : : /* Build and install a CONST_DECL for an enumeration constant of the
17853 : : enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
17854 : : Apply ATTRIBUTES if available. LOC is the location of NAME.
17855 : : Assignment of sequential values by default is handled here. */
17856 : :
17857 : : tree
17858 : 10448672 : build_enumerator (tree name, tree value, tree enumtype, tree attributes,
17859 : : location_t loc)
17860 : : {
17861 : 10448672 : tree decl;
17862 : 10448672 : tree context;
17863 : 10448672 : tree type;
17864 : :
17865 : : /* scalar_constant_value will pull out this expression, so make sure
17866 : : it's folded as appropriate.
17867 : :
17868 : : Creating a TARGET_EXPR in a template breaks when substituting, and
17869 : : here we would create it for instance when using a class prvalue with
17870 : : a user-defined conversion function. So don't use such a tree. We
17871 : : instantiate VALUE here to get errors about bad enumerators even in
17872 : : a template that does not get instantiated. */
17873 : 10448672 : if (processing_template_decl)
17874 : 344824 : value = maybe_fold_non_dependent_expr (value);
17875 : :
17876 : : /* If the VALUE was erroneous, pretend it wasn't there; that will
17877 : : result in the enum being assigned the next value in sequence. */
17878 : 10448672 : if (value == error_mark_node)
17879 : : value = NULL_TREE;
17880 : :
17881 : : /* Remove no-op casts from the value. */
17882 : 10448634 : if (value)
17883 : 7864589 : STRIP_TYPE_NOPS (value);
17884 : :
17885 : 10448672 : if (! processing_template_decl)
17886 : : {
17887 : : /* Validate and default VALUE. */
17888 : 10103848 : if (value != NULL_TREE)
17889 : : {
17890 : 4469134 : if (!ENUM_UNDERLYING_TYPE (enumtype))
17891 : : {
17892 : 2475764 : tree tmp_value = build_expr_type_conversion (WANT_INT | WANT_ENUM,
17893 : : value, true);
17894 : 2475764 : if (tmp_value)
17895 : 4469134 : value = tmp_value;
17896 : : }
17897 : 1993370 : else if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
17898 : : (TREE_TYPE (value)))
17899 : 39 : value = perform_implicit_conversion_flags
17900 : 39 : (ENUM_UNDERLYING_TYPE (enumtype), value, tf_warning_or_error,
17901 : : LOOKUP_IMPLICIT | LOOKUP_NO_NARROWING);
17902 : :
17903 : 4469134 : if (value == error_mark_node)
17904 : : value = NULL_TREE;
17905 : :
17906 : 4469113 : if (value != NULL_TREE)
17907 : : {
17908 : 4469113 : if (! INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P
17909 : : (TREE_TYPE (value)))
17910 : : {
17911 : 17 : error_at (cp_expr_loc_or_input_loc (value),
17912 : : "enumerator value for %qD must have integral or "
17913 : : "unscoped enumeration type", name);
17914 : 17 : value = NULL_TREE;
17915 : : }
17916 : : else
17917 : : {
17918 : 4469096 : value = cxx_constant_value (value);
17919 : :
17920 : 4469096 : if (TREE_CODE (value) != INTEGER_CST)
17921 : : {
17922 : 50 : error ("enumerator value for %qD is not an integer "
17923 : : "constant", name);
17924 : 50 : value = NULL_TREE;
17925 : : }
17926 : : }
17927 : : }
17928 : : }
17929 : :
17930 : : /* Default based on previous value. */
17931 : 67 : if (value == NULL_TREE)
17932 : : {
17933 : 5634802 : if (TYPE_VALUES (enumtype))
17934 : : {
17935 : 5210561 : tree prev_value;
17936 : :
17937 : : /* C++03 7.2/4: If no initializer is specified for the first
17938 : : enumerator, the type is an unspecified integral
17939 : : type. Otherwise the type is the same as the type of the
17940 : : initializing value of the preceding enumerator unless the
17941 : : incremented value is not representable in that type, in
17942 : : which case the type is an unspecified integral type
17943 : : sufficient to contain the incremented value. */
17944 : 5210561 : prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
17945 : 5210561 : if (TREE_CODE (prev_value) != INTEGER_CST)
17946 : 2 : value = error_mark_node;
17947 : : else
17948 : : {
17949 : 5210559 : wi::overflow_type overflowed;
17950 : 5210559 : tree type = TREE_TYPE (prev_value);
17951 : 5210559 : signop sgn = TYPE_SIGN (type);
17952 : 5210559 : widest_int wi = wi::add (wi::to_widest (prev_value), 1, sgn,
17953 : 5210559 : &overflowed);
17954 : 5210559 : if (!overflowed)
17955 : : {
17956 : 5210559 : bool pos = !wi::neg_p (wi, sgn);
17957 : 5210559 : if (!wi::fits_to_tree_p (wi, type))
17958 : : {
17959 : : unsigned int itk;
17960 : 53 : for (itk = itk_int; itk != itk_none; itk++)
17961 : : {
17962 : 53 : type = integer_types[itk];
17963 : 53 : if (type != NULL_TREE
17964 : 53 : && (pos || !TYPE_UNSIGNED (type))
17965 : 106 : && wi::fits_to_tree_p (wi, type))
17966 : : break;
17967 : : }
17968 : 17 : if (type && cxx_dialect < cxx11
17969 : 6 : && itk > itk_unsigned_long)
17970 : 3 : pedwarn (input_location, OPT_Wlong_long,
17971 : : pos ? G_("\
17972 : : incremented enumerator value is too large for %<unsigned long%>") : G_("\
17973 : : incremented enumerator value is too large for %<long%>"));
17974 : : }
17975 : 5210559 : if (type == NULL_TREE)
17976 : 0 : overflowed = wi::OVF_UNKNOWN;
17977 : : else
17978 : 5210559 : value = wide_int_to_tree (type, wi);
17979 : : }
17980 : :
17981 : 5210559 : if (overflowed)
17982 : : {
17983 : 0 : error ("overflow in enumeration values at %qD", name);
17984 : 0 : value = error_mark_node;
17985 : : }
17986 : 5210559 : }
17987 : : }
17988 : : else
17989 : 424241 : value = integer_zero_node;
17990 : : }
17991 : :
17992 : : /* Remove no-op casts from the value. */
17993 : 10103848 : STRIP_TYPE_NOPS (value);
17994 : :
17995 : : /* If the underlying type of the enum is fixed, check whether
17996 : : the enumerator values fits in the underlying type. If it
17997 : : does not fit, the program is ill-formed [C++0x dcl.enum]. */
17998 : 10103848 : if (ENUM_UNDERLYING_TYPE (enumtype)
17999 : : && value
18000 : 10103848 : && TREE_CODE (value) == INTEGER_CST)
18001 : : {
18002 : 2771423 : if (!int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
18003 : 9 : error ("enumerator value %qE is outside the range of underlying "
18004 : 9 : "type %qT", value, ENUM_UNDERLYING_TYPE (enumtype));
18005 : :
18006 : : /* Convert the value to the appropriate type. */
18007 : 2771423 : value = fold_convert (ENUM_UNDERLYING_TYPE (enumtype), value);
18008 : : }
18009 : : }
18010 : :
18011 : : /* C++ associates enums with global, function, or class declarations. */
18012 : 10448672 : context = current_scope ();
18013 : :
18014 : : /* Build the actual enumeration constant. Note that the enumeration
18015 : : constants have the underlying type of the enum (if it is fixed)
18016 : : or the type of their initializer (if the underlying type of the
18017 : : enum is not fixed):
18018 : :
18019 : : [ C++0x dcl.enum ]
18020 : :
18021 : : If the underlying type is fixed, the type of each enumerator
18022 : : prior to the closing brace is the underlying type; if the
18023 : : initializing value of an enumerator cannot be represented by
18024 : : the underlying type, the program is ill-formed. If the
18025 : : underlying type is not fixed, the type of each enumerator is
18026 : : the type of its initializing value.
18027 : :
18028 : : If the underlying type is not fixed, it will be computed by
18029 : : finish_enum and we will reset the type of this enumerator. Of
18030 : : course, if we're processing a template, there may be no value. */
18031 : 10448672 : type = value ? TREE_TYPE (value) : NULL_TREE;
18032 : :
18033 : 10448672 : decl = build_decl (loc, CONST_DECL, name, type);
18034 : :
18035 : 10448672 : DECL_CONTEXT (decl) = enumtype;
18036 : 10448672 : TREE_CONSTANT (decl) = 1;
18037 : 10448672 : TREE_READONLY (decl) = 1;
18038 : 10448672 : DECL_INITIAL (decl) = value;
18039 : :
18040 : 10448672 : if (attributes)
18041 : 42521 : cplus_decl_attributes (&decl, attributes, 0);
18042 : :
18043 : 10448672 : if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
18044 : : {
18045 : : /* In something like `struct S { enum E { i = 7 }; };' we put `i'
18046 : : on the TYPE_FIELDS list for `S'. (That's so that you can say
18047 : : things like `S::i' later.) */
18048 : :
18049 : : /* The enumerator may be getting declared outside of its enclosing
18050 : : class, like so:
18051 : :
18052 : : class S { public: enum E : int; }; enum S::E : int { i = 7; };
18053 : :
18054 : : For which case we need to make sure that the access of `S::i'
18055 : : matches the access of `S::E'. */
18056 : 1861140 : auto cas = make_temp_override (current_access_specifier);
18057 : 1861140 : set_current_access_from_decl (TYPE_NAME (enumtype));
18058 : 1861140 : finish_member_declaration (decl);
18059 : 1861140 : }
18060 : : else
18061 : 8587532 : pushdecl (decl);
18062 : :
18063 : : /* Add this enumeration constant to the list for this type. */
18064 : 10448672 : TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
18065 : :
18066 : 10448672 : return decl;
18067 : : }
18068 : :
18069 : : /* Look for an enumerator with the given NAME within the enumeration
18070 : : type ENUMTYPE. This routine is used primarily for qualified name
18071 : : lookup into an enumerator in C++0x, e.g.,
18072 : :
18073 : : enum class Color { Red, Green, Blue };
18074 : :
18075 : : Color color = Color::Red;
18076 : :
18077 : : Returns the value corresponding to the enumerator, or
18078 : : NULL_TREE if no such enumerator was found. */
18079 : : tree
18080 : 6931511 : lookup_enumerator (tree enumtype, tree name)
18081 : : {
18082 : 6931511 : tree e;
18083 : 6931511 : gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
18084 : :
18085 : 6931511 : e = purpose_member (name, TYPE_VALUES (enumtype));
18086 : 13862926 : return e? TREE_VALUE (e) : NULL_TREE;
18087 : : }
18088 : :
18089 : : /* Implement LANG_HOOKS_SIMULATE_ENUM_DECL. */
18090 : :
18091 : : tree
18092 : 0 : cxx_simulate_enum_decl (location_t loc, const char *name,
18093 : : vec<string_int_pair> *values)
18094 : : {
18095 : 0 : location_t saved_loc = input_location;
18096 : 0 : input_location = loc;
18097 : :
18098 : 0 : tree enumtype = start_enum (get_identifier (name), NULL_TREE, NULL_TREE,
18099 : : NULL_TREE, false, NULL);
18100 : 0 : if (!OPAQUE_ENUM_P (enumtype))
18101 : : {
18102 : 0 : auto_diagnostic_group d;
18103 : 0 : error_at (loc, "multiple definition of %q#T", enumtype);
18104 : 0 : inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
18105 : : "previous definition here");
18106 : 0 : return enumtype;
18107 : 0 : }
18108 : 0 : SET_OPAQUE_ENUM_P (enumtype, false);
18109 : 0 : DECL_SOURCE_LOCATION (TYPE_NAME (enumtype)) = loc;
18110 : :
18111 : 0 : for (const string_int_pair &value : values)
18112 : 0 : build_enumerator (get_identifier (value.first),
18113 : 0 : build_int_cst (integer_type_node, value.second),
18114 : : enumtype, NULL_TREE, loc);
18115 : :
18116 : 0 : finish_enum_value_list (enumtype);
18117 : 0 : finish_enum (enumtype);
18118 : :
18119 : 0 : input_location = saved_loc;
18120 : 0 : return enumtype;
18121 : : }
18122 : :
18123 : : /* Implement LANG_HOOKS_SIMULATE_RECORD_DECL. */
18124 : :
18125 : : tree
18126 : 0 : cxx_simulate_record_decl (location_t loc, const char *name,
18127 : : array_slice<const tree> fields)
18128 : : {
18129 : 0 : iloc_sentinel ils (loc);
18130 : :
18131 : 0 : tree ident = get_identifier (name);
18132 : 0 : tree type = xref_tag (/*tag_code=*/record_type, ident);
18133 : 0 : if (type != error_mark_node
18134 : 0 : && (TREE_CODE (type) != RECORD_TYPE || COMPLETE_TYPE_P (type)))
18135 : : {
18136 : 0 : error ("redefinition of %q#T", type);
18137 : 0 : type = error_mark_node;
18138 : : }
18139 : 0 : if (type == error_mark_node)
18140 : 0 : return lhd_simulate_record_decl (loc, name, fields);
18141 : :
18142 : 0 : xref_basetypes (type, NULL_TREE);
18143 : 0 : type = begin_class_definition (type);
18144 : 0 : if (type == error_mark_node)
18145 : 0 : return lhd_simulate_record_decl (loc, name, fields);
18146 : :
18147 : 0 : for (tree field : fields)
18148 : 0 : finish_member_declaration (field);
18149 : :
18150 : 0 : type = finish_struct (type, NULL_TREE);
18151 : :
18152 : 0 : tree decl = build_decl (loc, TYPE_DECL, ident, type);
18153 : 0 : set_underlying_type (decl);
18154 : 0 : lang_hooks.decls.pushdecl (decl);
18155 : :
18156 : 0 : return type;
18157 : 0 : }
18158 : :
18159 : : /* We're defining DECL. Make sure that its type is OK. */
18160 : :
18161 : : static void
18162 : 132649046 : check_function_type (tree decl, tree current_function_parms)
18163 : : {
18164 : 132649046 : tree fntype = TREE_TYPE (decl);
18165 : 132649046 : tree return_type = complete_type (TREE_TYPE (fntype));
18166 : :
18167 : : /* In a function definition, arg types must be complete. */
18168 : 132649046 : require_complete_types_for_parms (current_function_parms);
18169 : :
18170 : 132649046 : if (dependent_type_p (return_type)
18171 : 132649046 : || type_uses_auto (return_type))
18172 : 40080038 : return;
18173 : 92569008 : if (!COMPLETE_OR_VOID_TYPE_P (return_type))
18174 : : {
18175 : 12 : tree args = TYPE_ARG_TYPES (fntype);
18176 : :
18177 : 12 : error ("return type %q#T is incomplete", return_type);
18178 : :
18179 : : /* Make it return void instead. */
18180 : 12 : if (TREE_CODE (fntype) == METHOD_TYPE)
18181 : 3 : fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
18182 : : void_type_node,
18183 : 3 : TREE_CHAIN (args));
18184 : : else
18185 : 9 : fntype = build_function_type (void_type_node, args);
18186 : 12 : fntype = (cp_build_type_attribute_variant
18187 : 12 : (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
18188 : 12 : fntype = cxx_copy_lang_qualifiers (fntype, TREE_TYPE (decl));
18189 : 12 : TREE_TYPE (decl) = fntype;
18190 : : }
18191 : : else
18192 : : {
18193 : 92568996 : abstract_virtuals_error (decl, TREE_TYPE (fntype));
18194 : 92568996 : maybe_warn_parm_abi (TREE_TYPE (fntype),
18195 : 92568996 : DECL_SOURCE_LOCATION (decl));
18196 : : }
18197 : : }
18198 : :
18199 : : /* True iff FN is an implicitly-defined default constructor. */
18200 : :
18201 : : static bool
18202 : 4415119 : implicit_default_ctor_p (tree fn)
18203 : : {
18204 : 4415119 : return (DECL_CONSTRUCTOR_P (fn)
18205 : 4415119 : && !user_provided_p (fn)
18206 : 5016379 : && sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (fn)));
18207 : : }
18208 : :
18209 : : /* Clobber the contents of *this to let the back end know that the object
18210 : : storage is dead when we enter the constructor or leave the destructor. */
18211 : :
18212 : : static tree
18213 : 5255287 : build_clobber_this (clobber_kind kind)
18214 : : {
18215 : : /* Clobbering an empty base is pointless, and harmful if its one byte
18216 : : TYPE_SIZE overlays real data. */
18217 : 5255287 : if (is_empty_class (current_class_type))
18218 : 0 : return void_node;
18219 : :
18220 : : /* If we have virtual bases, clobber the whole object, but only if we're in
18221 : : charge. If we don't have virtual bases, clobber the as-base type so we
18222 : : don't mess with tail padding. */
18223 : 5255287 : bool vbases = CLASSTYPE_VBASECLASSES (current_class_type);
18224 : :
18225 : 5255287 : tree ctype = current_class_type;
18226 : 5255287 : if (!vbases)
18227 : 5238941 : ctype = CLASSTYPE_AS_BASE (ctype);
18228 : :
18229 : 5255287 : tree clobber = build_clobber (ctype, kind);
18230 : :
18231 : 5255287 : tree thisref = current_class_ref;
18232 : 5255287 : if (ctype != current_class_type)
18233 : : {
18234 : 579718 : thisref = build_nop (build_reference_type (ctype), current_class_ptr);
18235 : 579718 : thisref = convert_from_reference (thisref);
18236 : : }
18237 : :
18238 : 5255287 : tree exprstmt = build2 (MODIFY_EXPR, void_type_node, thisref, clobber);
18239 : 5255287 : if (vbases)
18240 : 16346 : exprstmt = build_if_in_charge (exprstmt);
18241 : :
18242 : : return exprstmt;
18243 : : }
18244 : :
18245 : : /* Create the FUNCTION_DECL for a function definition.
18246 : : DECLSPECS and DECLARATOR are the parts of the declaration;
18247 : : they describe the function's name and the type it returns,
18248 : : but twisted together in a fashion that parallels the syntax of C.
18249 : :
18250 : : FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
18251 : : DECLARATOR is really the DECL for the function we are about to
18252 : : process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
18253 : : indicating that the function is an inline defined in-class.
18254 : :
18255 : : This function creates a binding context for the function body
18256 : : as well as setting up the FUNCTION_DECL in current_function_decl.
18257 : :
18258 : : For C++, we must first check whether that datum makes any sense.
18259 : : For example, "class A local_a(1,2);" means that variable local_a
18260 : : is an aggregate of type A, which should have a constructor
18261 : : applied to it with the argument list [1, 2].
18262 : :
18263 : : On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
18264 : : or may be a BLOCK if the function has been defined previously
18265 : : in this translation unit. On exit, DECL_INITIAL (decl1) will be
18266 : : error_mark_node if the function has never been defined, or
18267 : : a BLOCK if the function has been defined somewhere. */
18268 : :
18269 : : bool
18270 : 132649082 : start_preparsed_function (tree decl1, tree attrs, int flags)
18271 : : {
18272 : 132649082 : tree ctype = NULL_TREE;
18273 : 132649082 : bool doing_friend = false;
18274 : :
18275 : : /* Sanity check. */
18276 : 132649082 : gcc_assert (VOID_TYPE_P (TREE_VALUE (void_list_node)));
18277 : 132649082 : gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
18278 : :
18279 : 132649082 : tree fntype = TREE_TYPE (decl1);
18280 : 132649082 : if (DECL_CLASS_SCOPE_P (decl1))
18281 : 95637727 : ctype = DECL_CONTEXT (decl1);
18282 : : else
18283 : : {
18284 : 74022710 : ctype = DECL_FRIEND_CONTEXT (decl1);
18285 : :
18286 : 37011355 : if (ctype)
18287 : 132649082 : doing_friend = true;
18288 : : }
18289 : :
18290 : : /* Adjust for #pragma target/optimize if this is an artificial function that
18291 : : (probably) didn't go through grokfndecl. We particularly don't want this
18292 : : for deferred instantiations, which should match their template. */
18293 : 132649082 : if (DECL_ARTIFICIAL (decl1))
18294 : 2633811 : decl_attributes (&decl1, NULL_TREE, 0);
18295 : :
18296 : 132649082 : if (DECL_DECLARED_INLINE_P (decl1)
18297 : 132649082 : && lookup_attribute ("noinline", attrs))
18298 : : {
18299 : 0 : auto_urlify_attributes sentinel;
18300 : 0 : warning_at (DECL_SOURCE_LOCATION (decl1), 0,
18301 : : "inline function %qD given attribute %qs", decl1, "noinline");
18302 : 0 : }
18303 : :
18304 : : /* Handle gnu_inline attribute. */
18305 : 132649082 : if (GNU_INLINE_P (decl1))
18306 : : {
18307 : 1586443 : DECL_EXTERNAL (decl1) = 1;
18308 : 1586443 : DECL_NOT_REALLY_EXTERN (decl1) = 0;
18309 : 1586443 : DECL_INTERFACE_KNOWN (decl1) = 1;
18310 : 1586443 : DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
18311 : : }
18312 : :
18313 : 132649082 : if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
18314 : : /* This is a constructor, we must ensure that any default args
18315 : : introduced by this definition are propagated to the clones
18316 : : now. The clones are used directly in overload resolution. */
18317 : 17374645 : adjust_clone_args (decl1);
18318 : :
18319 : : /* Sometimes we don't notice that a function is a static member, and
18320 : : build a METHOD_TYPE for it. Fix that up now. */
18321 : 132649082 : gcc_assert (!(DECL_STATIC_FUNCTION_P (decl1)
18322 : : && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE));
18323 : :
18324 : : /* Set up current_class_type, and enter the scope of the class, if
18325 : : appropriate. */
18326 : 132649082 : if (ctype)
18327 : 98101038 : push_nested_class (ctype);
18328 : :
18329 : : /* Now that we have entered the scope of the class, we must restore
18330 : : the bindings for any template parameters surrounding DECL1, if it
18331 : : is an inline member template. (Order is important; consider the
18332 : : case where a template parameter has the same name as a field of
18333 : : the class.) It is not until after this point that
18334 : : PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
18335 : 132649082 : if (flags & SF_INCLASS_INLINE)
18336 : 64892204 : maybe_begin_member_template_processing (decl1);
18337 : :
18338 : : /* Effective C++ rule 15. */
18339 : 132649082 : if (warn_ecpp
18340 : 123 : && DECL_ASSIGNMENT_OPERATOR_P (decl1)
18341 : 30 : && DECL_OVERLOADED_OPERATOR_IS (decl1, NOP_EXPR)
18342 : 132649112 : && VOID_TYPE_P (TREE_TYPE (fntype)))
18343 : 0 : warning (OPT_Weffc__,
18344 : : "%<operator=%> should return a reference to %<*this%>");
18345 : :
18346 : : /* Make the init_value nonzero so pushdecl knows this is not tentative.
18347 : : error_mark_node is replaced below (in poplevel) with the BLOCK. */
18348 : 132649082 : if (!DECL_INITIAL (decl1))
18349 : 26706241 : DECL_INITIAL (decl1) = error_mark_node;
18350 : :
18351 : : /* This function exists in static storage.
18352 : : (This does not mean `static' in the C sense!) */
18353 : 132649082 : TREE_STATIC (decl1) = 1;
18354 : :
18355 : : /* We must call push_template_decl after current_class_type is set
18356 : : up. (If we are processing inline definitions after exiting a
18357 : : class scope, current_class_type will be NULL_TREE until set above
18358 : : by push_nested_class.) */
18359 : 132649082 : if (processing_template_decl)
18360 : : {
18361 : 80519847 : tree newdecl1 = push_template_decl (decl1, doing_friend);
18362 : 80519847 : if (newdecl1 == error_mark_node)
18363 : : {
18364 : 36 : if (ctype)
18365 : 9 : pop_nested_class ();
18366 : 36 : return false;
18367 : : }
18368 : 80519811 : decl1 = newdecl1;
18369 : : }
18370 : :
18371 : : /* Make sure the parameter and return types are reasonable. When
18372 : : you declare a function, these types can be incomplete, but they
18373 : : must be complete when you define the function. */
18374 : 132649046 : check_function_type (decl1, DECL_ARGUMENTS (decl1));
18375 : :
18376 : : /* Build the return declaration for the function. */
18377 : 132649046 : tree restype = TREE_TYPE (fntype);
18378 : :
18379 : 132649046 : if (DECL_RESULT (decl1) == NULL_TREE)
18380 : : {
18381 : : /* In a template instantiation, copy the return type location. When
18382 : : parsing, the location will be set in grokdeclarator. */
18383 : 51553383 : location_t loc = input_location;
18384 : 51553383 : if (DECL_TEMPLATE_INSTANTIATION (decl1))
18385 : : {
18386 : 23854161 : tree tmpl = template_for_substitution (decl1);
18387 : 23854161 : if (tree res = DECL_RESULT (DECL_TEMPLATE_RESULT (tmpl)))
18388 : 22933627 : loc = DECL_SOURCE_LOCATION (res);
18389 : : }
18390 : :
18391 : 51553383 : tree resdecl = build_decl (loc, RESULT_DECL, 0, restype);
18392 : 51553383 : DECL_ARTIFICIAL (resdecl) = 1;
18393 : 51553383 : DECL_IGNORED_P (resdecl) = 1;
18394 : 51553383 : DECL_RESULT (decl1) = resdecl;
18395 : :
18396 : 51553383 : cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
18397 : : }
18398 : :
18399 : : /* Record the decl so that the function name is defined.
18400 : : If we already have a decl for this name, and it is a FUNCTION_DECL,
18401 : : use the old decl. */
18402 : 132649046 : if (!processing_template_decl && !(flags & SF_PRE_PARSED))
18403 : : {
18404 : : /* A specialization is not used to guide overload resolution. */
18405 : 19069716 : if (!DECL_FUNCTION_MEMBER_P (decl1)
18406 : 19057157 : && !(DECL_USE_TEMPLATE (decl1) &&
18407 : 566 : PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
18408 : : {
18409 : 9145297 : tree olddecl = pushdecl (decl1);
18410 : :
18411 : 9145297 : if (olddecl == error_mark_node)
18412 : : /* If something went wrong when registering the declaration,
18413 : : use DECL1; we have to have a FUNCTION_DECL to use when
18414 : : parsing the body of the function. */
18415 : : ;
18416 : : else
18417 : : {
18418 : : /* Otherwise, OLDDECL is either a previous declaration
18419 : : of the same function or DECL1 itself. */
18420 : :
18421 : 9145084 : if (warn_missing_declarations
18422 : 21 : && olddecl == decl1
18423 : 15 : && !DECL_MAIN_P (decl1)
18424 : 15 : && TREE_PUBLIC (decl1)
18425 : 9145096 : && !DECL_DECLARED_INLINE_P (decl1))
18426 : : {
18427 : 9 : tree context;
18428 : :
18429 : : /* Check whether DECL1 is in an anonymous
18430 : : namespace. */
18431 : 9 : for (context = DECL_CONTEXT (decl1);
18432 : 18 : context;
18433 : 9 : context = DECL_CONTEXT (context))
18434 : : {
18435 : 12 : if (TREE_CODE (context) == NAMESPACE_DECL
18436 : 12 : && DECL_NAME (context) == NULL_TREE)
18437 : : break;
18438 : : }
18439 : :
18440 : 9 : if (context == NULL)
18441 : 6 : warning_at (DECL_SOURCE_LOCATION (decl1),
18442 : : OPT_Wmissing_declarations,
18443 : : "no previous declaration for %qD", decl1);
18444 : : }
18445 : :
18446 : 9145084 : decl1 = olddecl;
18447 : : }
18448 : : }
18449 : : else
18450 : : {
18451 : : /* We need to set the DECL_CONTEXT. */
18452 : 765997 : if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
18453 : 0 : DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
18454 : : }
18455 : 9911294 : fntype = TREE_TYPE (decl1);
18456 : 9911294 : restype = TREE_TYPE (fntype);
18457 : :
18458 : : /* If #pragma weak applies, mark the decl appropriately now.
18459 : : The pragma only applies to global functions. Because
18460 : : determining whether or not the #pragma applies involves
18461 : : computing the mangled name for the declaration, we cannot
18462 : : apply the pragma until after we have merged this declaration
18463 : : with any previous declarations; if the original declaration
18464 : : has a linkage specification, that specification applies to
18465 : : the definition as well, and may affect the mangled name. */
18466 : 9911294 : if (DECL_FILE_SCOPE_P (decl1))
18467 : 2335252 : maybe_apply_pragma_weak (decl1);
18468 : : }
18469 : :
18470 : : /* We are now in the scope of the function being defined. */
18471 : 132649046 : current_function_decl = decl1;
18472 : :
18473 : : /* Save the parm names or decls from this function's declarator
18474 : : where store_parm_decls will find them. */
18475 : 132649046 : tree current_function_parms = DECL_ARGUMENTS (decl1);
18476 : :
18477 : : /* Let the user know we're compiling this function. */
18478 : 132649046 : announce_function (decl1);
18479 : :
18480 : 132649046 : gcc_assert (DECL_INITIAL (decl1));
18481 : :
18482 : : /* This function may already have been parsed, in which case just
18483 : : return; our caller will skip over the body without parsing. */
18484 : 132649046 : if (DECL_INITIAL (decl1) != error_mark_node)
18485 : : return true;
18486 : :
18487 : : /* Initialize RTL machinery. We cannot do this until
18488 : : CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
18489 : : even when processing a template; this is how we get
18490 : : CFUN set up, and our per-function variables initialized.
18491 : : FIXME factor out the non-RTL stuff. */
18492 : 132649046 : cp_binding_level *bl = current_binding_level;
18493 : 132649046 : allocate_struct_function (decl1, processing_template_decl);
18494 : :
18495 : : /* Initialize the language data structures. Whenever we start
18496 : : a new function, we destroy temporaries in the usual way. */
18497 : 132649046 : cfun->language = ggc_cleared_alloc<language_function> ();
18498 : 132649046 : current_stmt_tree ()->stmts_are_full_exprs_p = 1;
18499 : 132649046 : current_binding_level = bl;
18500 : :
18501 : : /* If we are (erroneously) defining a function that we have already
18502 : : defined before, wipe out what we knew before. */
18503 : 132649046 : gcc_checking_assert (!DECL_PENDING_INLINE_P (decl1));
18504 : 132649046 : FNDECL_USED_AUTO (decl1) = false;
18505 : 132649046 : DECL_SAVED_AUTO_RETURN_TYPE (decl1) = NULL;
18506 : :
18507 : 132649046 : if (!processing_template_decl && type_uses_auto (restype))
18508 : : {
18509 : 607646 : FNDECL_USED_AUTO (decl1) = true;
18510 : 607646 : DECL_SAVED_AUTO_RETURN_TYPE (decl1) = restype;
18511 : : }
18512 : :
18513 : : /* Start the statement-tree, start the tree now. */
18514 : 132649046 : DECL_SAVED_TREE (decl1) = push_stmt_list ();
18515 : :
18516 : 132649046 : if (DECL_IOBJ_MEMBER_FUNCTION_P (decl1))
18517 : : {
18518 : : /* We know that this was set up by `grokclassfn'. We do not
18519 : : wait until `store_parm_decls', since evil parse errors may
18520 : : never get us to that point. Here we keep the consistency
18521 : : between `current_class_type' and `current_class_ptr'. */
18522 : 85540891 : tree t = DECL_ARGUMENTS (decl1);
18523 : :
18524 : 85540891 : gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
18525 : 85540891 : gcc_assert (TYPE_PTR_P (TREE_TYPE (t)));
18526 : :
18527 : 85540891 : cp_function_chain->x_current_class_ref
18528 : 85540891 : = cp_build_fold_indirect_ref (t);
18529 : : /* Set this second to avoid shortcut in cp_build_indirect_ref. */
18530 : 85540891 : cp_function_chain->x_current_class_ptr = t;
18531 : :
18532 : : /* Constructors and destructors need to know whether they're "in
18533 : : charge" of initializing virtual base classes. */
18534 : 85540891 : t = DECL_CHAIN (t);
18535 : 85540891 : if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
18536 : : {
18537 : 18430 : current_in_charge_parm = t;
18538 : 18430 : t = DECL_CHAIN (t);
18539 : : }
18540 : 85540891 : if (DECL_HAS_VTT_PARM_P (decl1))
18541 : : {
18542 : 36873 : gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
18543 : 36873 : current_vtt_parm = t;
18544 : : }
18545 : : }
18546 : :
18547 : 132649046 : bool honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
18548 : : /* Implicitly-defined methods (like the
18549 : : destructor for a class in which no destructor
18550 : : is explicitly declared) must not be defined
18551 : : until their definition is needed. So, we
18552 : : ignore interface specifications for
18553 : : compiler-generated functions. */
18554 : 132649046 : && !DECL_ARTIFICIAL (decl1));
18555 : 132649046 : struct c_fileinfo *finfo
18556 : 132649046 : = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
18557 : :
18558 : 132649046 : if (processing_template_decl)
18559 : : /* Don't mess with interface flags. */;
18560 : 52129235 : else if (DECL_INTERFACE_KNOWN (decl1))
18561 : : {
18562 : 16418934 : tree ctx = decl_function_context (decl1);
18563 : :
18564 : 16418934 : if (DECL_NOT_REALLY_EXTERN (decl1))
18565 : 13053346 : DECL_EXTERNAL (decl1) = 0;
18566 : :
18567 : 16418934 : if (ctx != NULL_TREE && vague_linkage_p (ctx))
18568 : : /* This is a function in a local class in an extern inline
18569 : : or template function. */
18570 : 2582980 : comdat_linkage (decl1);
18571 : : }
18572 : : /* If this function belongs to an interface, it is public.
18573 : : If it belongs to someone else's interface, it is also external.
18574 : : This only affects inlines and template instantiations. */
18575 : 35710301 : else if (!finfo->interface_unknown && honor_interface)
18576 : : {
18577 : 112 : if (DECL_DECLARED_INLINE_P (decl1)
18578 : 112 : || DECL_TEMPLATE_INSTANTIATION (decl1))
18579 : : {
18580 : 88 : DECL_EXTERNAL (decl1)
18581 : 176 : = (finfo->interface_only
18582 : 88 : || (DECL_DECLARED_INLINE_P (decl1)
18583 : 42 : && ! flag_implement_inlines
18584 : 0 : && !DECL_VINDEX (decl1)));
18585 : :
18586 : : /* For WIN32 we also want to put these in linkonce sections. */
18587 : 88 : maybe_make_one_only (decl1);
18588 : : }
18589 : : else
18590 : 24 : DECL_EXTERNAL (decl1) = 0;
18591 : 112 : DECL_INTERFACE_KNOWN (decl1) = 1;
18592 : : /* If this function is in an interface implemented in this file,
18593 : : make sure that the back end knows to emit this function
18594 : : here. */
18595 : 112 : if (!DECL_EXTERNAL (decl1))
18596 : 66 : mark_needed (decl1);
18597 : : }
18598 : 35710189 : else if (finfo->interface_unknown && finfo->interface_only
18599 : 0 : && honor_interface)
18600 : : {
18601 : : /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
18602 : : interface, we will have both finfo->interface_unknown and
18603 : : finfo->interface_only set. In that case, we don't want to
18604 : : use the normal heuristics because someone will supply a
18605 : : #pragma implementation elsewhere, and deducing it here would
18606 : : produce a conflict. */
18607 : 0 : comdat_linkage (decl1);
18608 : 0 : DECL_EXTERNAL (decl1) = 0;
18609 : 0 : DECL_INTERFACE_KNOWN (decl1) = 1;
18610 : 0 : DECL_DEFER_OUTPUT (decl1) = 1;
18611 : : }
18612 : : else
18613 : : {
18614 : : /* This is a definition, not a reference.
18615 : : So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
18616 : 35710189 : if (!GNU_INLINE_P (decl1))
18617 : 35710189 : DECL_EXTERNAL (decl1) = 0;
18618 : :
18619 : 35710189 : if ((DECL_DECLARED_INLINE_P (decl1)
18620 : 1952596 : || DECL_TEMPLATE_INSTANTIATION (decl1))
18621 : 37436339 : && ! DECL_INTERFACE_KNOWN (decl1))
18622 : 35483743 : DECL_DEFER_OUTPUT (decl1) = 1;
18623 : : else
18624 : 226446 : DECL_INTERFACE_KNOWN (decl1) = 1;
18625 : : }
18626 : :
18627 : : /* Determine the ELF visibility attribute for the function. We must not
18628 : : do this before calling "pushdecl", as we must allow "duplicate_decls"
18629 : : to merge any attributes appropriately. We also need to wait until
18630 : : linkage is set. */
18631 : 132649046 : if (!DECL_CLONED_FUNCTION_P (decl1))
18632 : 119670705 : determine_visibility (decl1);
18633 : :
18634 : 132649046 : if (!processing_template_decl)
18635 : 52129235 : maybe_instantiate_noexcept (decl1);
18636 : :
18637 : 132649046 : begin_scope (sk_function_parms, decl1);
18638 : :
18639 : 132649046 : ++function_depth;
18640 : :
18641 : 132649046 : start_fname_decls ();
18642 : :
18643 : 132649046 : store_parm_decls (current_function_parms);
18644 : :
18645 : 132649046 : start_function_contracts (decl1);
18646 : :
18647 : 132649046 : if (!processing_template_decl
18648 : 52129235 : && (flag_lifetime_dse > 1)
18649 : 104234266 : && DECL_CONSTRUCTOR_P (decl1)
18650 : 14839731 : && !DECL_CLONED_FUNCTION_P (decl1)
18651 : : /* Clobbering an empty base is harmful if it overlays real data. */
18652 : 4941265 : && !is_empty_class (current_class_type)
18653 : : /* We can't clobber safely for an implicitly-defined default constructor
18654 : : because part of the initialization might happen before we enter the
18655 : : constructor, via AGGR_INIT_ZERO_FIRST (c++/68006). */
18656 : 137063602 : && !implicit_default_ctor_p (decl1))
18657 : 4030840 : finish_expr_stmt (build_clobber_this (CLOBBER_OBJECT_BEGIN));
18658 : :
18659 : 132649046 : if (!processing_template_decl
18660 : 104258470 : && DECL_CONSTRUCTOR_P (decl1)
18661 : 14843091 : && sanitize_flags_p (SANITIZE_VPTR)
18662 : 1689 : && !DECL_CLONED_FUNCTION_P (decl1)
18663 : 132649609 : && !implicit_default_ctor_p (decl1))
18664 : 420 : cp_ubsan_maybe_initialize_vtbl_ptrs (current_class_ptr);
18665 : :
18666 : 132649046 : if (!DECL_OMP_DECLARE_REDUCTION_P (decl1))
18667 : 132648478 : start_lambda_scope (decl1);
18668 : :
18669 : : return true;
18670 : : }
18671 : :
18672 : :
18673 : : /* Like start_preparsed_function, except that instead of a
18674 : : FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
18675 : :
18676 : : Returns true on success. If the DECLARATOR is not suitable
18677 : : for a function, we return false, which tells the parser to
18678 : : skip the entire function. */
18679 : :
18680 : : bool
18681 : 37207287 : start_function (cp_decl_specifier_seq *declspecs,
18682 : : const cp_declarator *declarator,
18683 : : tree attrs)
18684 : : {
18685 : 37207287 : tree decl1;
18686 : :
18687 : 37207287 : decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
18688 : 37207287 : invoke_plugin_callbacks (PLUGIN_START_PARSE_FUNCTION, decl1);
18689 : 37207287 : if (decl1 == error_mark_node)
18690 : : return false;
18691 : :
18692 : 37206998 : if (DECL_MAIN_P (decl1))
18693 : : /* main must return int. grokfndecl should have corrected it
18694 : : (and issued a diagnostic) if the user got it wrong. */
18695 : 31695 : gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
18696 : : integer_type_node));
18697 : :
18698 : 37206998 : return start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
18699 : : }
18700 : :
18701 : : /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
18702 : : FN. */
18703 : :
18704 : : bool
18705 : 252321078 : use_eh_spec_block (tree fn)
18706 : : {
18707 : 250384576 : return (flag_exceptions && flag_enforce_eh_specs
18708 : 250384576 : && !processing_template_decl
18709 : : /* We insert the EH_SPEC_BLOCK only in the original
18710 : : function; then, it is copied automatically to the
18711 : : clones. */
18712 : 89641512 : && !DECL_CLONED_FUNCTION_P (fn)
18713 : : /* Implicitly-generated constructors and destructors have
18714 : : exception specifications. However, those specifications
18715 : : are the union of the possible exceptions specified by the
18716 : : constructors/destructors for bases and members, so no
18717 : : unallowed exception will ever reach this function. By
18718 : : not creating the EH_SPEC_BLOCK we save a little memory,
18719 : : and we avoid spurious warnings about unreachable
18720 : : code. */
18721 : 76702026 : && !DECL_DEFAULTED_FN (fn)
18722 : 326868812 : && !type_throw_all_p (TREE_TYPE (fn)));
18723 : : }
18724 : :
18725 : : /* Helper function to push ARGS into the current lexical scope. DECL
18726 : : is the function declaration. NONPARMS is used to handle enum
18727 : : constants. */
18728 : :
18729 : : void
18730 : 129740520 : do_push_parm_decls (tree decl, tree args, tree *nonparms)
18731 : : {
18732 : : /* If we're doing semantic analysis, then we'll call pushdecl
18733 : : for each of these. We must do them in reverse order so that
18734 : : they end in the correct forward order. */
18735 : 129740520 : args = nreverse (args);
18736 : :
18737 : 129740520 : tree next;
18738 : 397235344 : for (tree parm = args; parm; parm = next)
18739 : : {
18740 : 267494824 : next = DECL_CHAIN (parm);
18741 : 267494824 : if (TREE_CODE (parm) == PARM_DECL)
18742 : 267494824 : pushdecl (parm);
18743 : 0 : else if (nonparms)
18744 : : {
18745 : : /* If we find an enum constant or a type tag, put it aside for
18746 : : the moment. */
18747 : 0 : TREE_CHAIN (parm) = NULL_TREE;
18748 : 0 : *nonparms = chainon (*nonparms, parm);
18749 : : }
18750 : : }
18751 : :
18752 : : /* Get the decls in their original chain order and record in the
18753 : : function. This is all and only the PARM_DECLs that were
18754 : : pushed into scope by the loop above. */
18755 : 129740520 : DECL_ARGUMENTS (decl) = get_local_decls ();
18756 : 129740520 : }
18757 : :
18758 : : /* Store the parameter declarations into the current function declaration.
18759 : : This is called after parsing the parameter declarations, before
18760 : : digesting the body of the function.
18761 : :
18762 : : Also install to binding contour return value identifier, if any. */
18763 : :
18764 : : static void
18765 : 132649046 : store_parm_decls (tree current_function_parms)
18766 : : {
18767 : 132649046 : tree fndecl = current_function_decl;
18768 : :
18769 : : /* This is a chain of any other decls that came in among the parm
18770 : : declarations. If a parm is declared with enum {foo, bar} x;
18771 : : then CONST_DECLs for foo and bar are put here. */
18772 : 132649046 : tree nonparms = NULL_TREE;
18773 : :
18774 : 132649046 : if (current_function_parms)
18775 : : {
18776 : : /* This case is when the function was defined with an ANSI prototype.
18777 : : The parms already have decls, so we need not do anything here
18778 : : except record them as in effect
18779 : : and complain if any redundant old-style parm decls were written. */
18780 : :
18781 : 127359063 : tree specparms = current_function_parms;
18782 : :
18783 : : /* Must clear this because it might contain TYPE_DECLs declared
18784 : : at class level. */
18785 : 127359063 : current_binding_level->names = NULL;
18786 : :
18787 : 127359063 : do_push_parm_decls (fndecl, specparms, &nonparms);
18788 : : }
18789 : : else
18790 : 5289983 : DECL_ARGUMENTS (fndecl) = NULL_TREE;
18791 : :
18792 : : /* Now store the final chain of decls for the arguments
18793 : : as the decl-chain of the current lexical scope.
18794 : : Put the enumerators in as well, at the front so that
18795 : : DECL_ARGUMENTS is not modified. */
18796 : 132649046 : current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
18797 : :
18798 : 132649046 : if (use_eh_spec_block (current_function_decl))
18799 : 17289069 : current_eh_spec_block = begin_eh_spec_block ();
18800 : 132649046 : }
18801 : :
18802 : :
18803 : : /* Mark CDTOR's implicit THIS argument for returning, if required by
18804 : : the ABI.. Return the decl for THIS, if it is to be returned, and
18805 : : NULL otherwise. */
18806 : :
18807 : : tree
18808 : 104196154 : maybe_prepare_return_this (tree cdtor)
18809 : : {
18810 : 104196154 : if (targetm.cxx.cdtor_returns_this ())
18811 : 0 : if (tree val = DECL_ARGUMENTS (cdtor))
18812 : : {
18813 : 0 : suppress_warning (val, OPT_Wuse_after_free);
18814 : 0 : return val;
18815 : : }
18816 : :
18817 : : return NULL_TREE;
18818 : : }
18819 : :
18820 : : /* Set the return value of the [cd]tor if the ABI wants that. */
18821 : :
18822 : : void
18823 : 6603678 : maybe_return_this ()
18824 : : {
18825 : 6603678 : if (tree val = maybe_prepare_return_this (current_function_decl))
18826 : : {
18827 : : /* Return the address of the object. */
18828 : 0 : val = fold_convert (TREE_TYPE (DECL_RESULT (current_function_decl)), val);
18829 : 0 : val = build2 (MODIFY_EXPR, TREE_TYPE (val),
18830 : 0 : DECL_RESULT (current_function_decl), val);
18831 : 0 : tree exprstmt = build_stmt (input_location, RETURN_EXPR, val);
18832 : 0 : add_stmt (exprstmt);
18833 : : }
18834 : 6603678 : }
18835 : :
18836 : : /* Do all the processing for the beginning of a destructor; set up the
18837 : : vtable pointers and cleanups for bases and members. */
18838 : :
18839 : : static void
18840 : 1410896 : begin_destructor_body (void)
18841 : : {
18842 : 1410896 : tree compound_stmt;
18843 : :
18844 : : /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
18845 : : issued an error message. We still want to try to process the
18846 : : body of the function, but initialize_vtbl_ptrs will crash if
18847 : : TYPE_BINFO is NULL. */
18848 : 1410896 : if (COMPLETE_TYPE_P (current_class_type))
18849 : : {
18850 : 1410896 : compound_stmt = begin_compound_stmt (0);
18851 : : /* Make all virtual function table pointers in non-virtual base
18852 : : classes point to CURRENT_CLASS_TYPE's virtual function
18853 : : tables. */
18854 : 1410896 : initialize_vtbl_ptrs (current_class_ptr);
18855 : 1410896 : finish_compound_stmt (compound_stmt);
18856 : :
18857 : 1410896 : if (flag_lifetime_dse
18858 : : /* Clobbering an empty base is harmful if it overlays real data. */
18859 : 1410896 : && !is_empty_class (current_class_type))
18860 : : {
18861 : 1224510 : if (sanitize_flags_p (SANITIZE_VPTR)
18862 : 209 : && (flag_sanitize_recover & SANITIZE_VPTR) == 0
18863 : 1224573 : && TYPE_CONTAINS_VPTR_P (current_class_type))
18864 : : {
18865 : 63 : tree binfo = TYPE_BINFO (current_class_type);
18866 : 63 : tree ref
18867 : 63 : = cp_build_fold_indirect_ref (current_class_ptr);
18868 : :
18869 : 63 : tree vtbl_ptr = build_vfield_ref (ref, TREE_TYPE (binfo));
18870 : 63 : tree vtbl = build_zero_cst (TREE_TYPE (vtbl_ptr));
18871 : 63 : tree stmt = cp_build_modify_expr (input_location, vtbl_ptr,
18872 : : NOP_EXPR, vtbl,
18873 : : tf_warning_or_error);
18874 : : /* If the vptr is shared with some virtual nearly empty base,
18875 : : don't clear it if not in charge, the dtor of the virtual
18876 : : nearly empty base will do that later. */
18877 : 63 : if (CLASSTYPE_VBASECLASSES (current_class_type))
18878 : : {
18879 : : tree c = current_class_type;
18880 : 66 : while (CLASSTYPE_PRIMARY_BINFO (c))
18881 : : {
18882 : 63 : if (BINFO_VIRTUAL_P (CLASSTYPE_PRIMARY_BINFO (c)))
18883 : : {
18884 : 36 : stmt = convert_to_void (stmt, ICV_STATEMENT,
18885 : : tf_warning_or_error);
18886 : 36 : stmt = build_if_in_charge (stmt);
18887 : 36 : break;
18888 : : }
18889 : 27 : c = BINFO_TYPE (CLASSTYPE_PRIMARY_BINFO (c));
18890 : : }
18891 : : }
18892 : 63 : finish_decl_cleanup (NULL_TREE, stmt);
18893 : : }
18894 : : else
18895 : 1224447 : finish_decl_cleanup (NULL_TREE,
18896 : : build_clobber_this (CLOBBER_OBJECT_END));
18897 : : }
18898 : :
18899 : : /* And insert cleanups for our bases and members so that they
18900 : : will be properly destroyed if we throw. */
18901 : 1410896 : push_base_cleanups ();
18902 : : }
18903 : 1410896 : }
18904 : :
18905 : : /* Do the necessary processing for the beginning of a function body, which
18906 : : in this case includes member-initializers, but not the catch clauses of
18907 : : a function-try-block. Currently, this means opening a binding level
18908 : : for the member-initializers (in a ctor), member cleanups (in a dtor),
18909 : : and capture proxies (in a lambda operator()). */
18910 : :
18911 : : tree
18912 : 106497061 : begin_function_body (void)
18913 : : {
18914 : 217501339 : if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
18915 : : return NULL_TREE;
18916 : :
18917 : 20926637 : if (processing_template_decl)
18918 : : /* Do nothing now. */;
18919 : : else
18920 : : /* Always keep the BLOCK node associated with the outermost pair of
18921 : : curly braces of a function. These are needed for correct
18922 : : operation of dwarfout.c. */
18923 : 6723146 : keep_next_level (true);
18924 : :
18925 : 20926637 : tree stmt = begin_compound_stmt (BCS_FN_BODY);
18926 : 20926637 : current_binding_level->artificial = 1;
18927 : :
18928 : 20926637 : if (processing_template_decl)
18929 : : /* Do nothing now. */;
18930 : 13446292 : else if (DECL_DESTRUCTOR_P (current_function_decl))
18931 : 1410896 : begin_destructor_body ();
18932 : :
18933 : : return stmt;
18934 : : }
18935 : :
18936 : : /* Do the processing for the end of a function body. Currently, this means
18937 : : closing out the cleanups for fully-constructed bases and members, and in
18938 : : the case of the destructor, deleting the object if desired. Again, this
18939 : : is only meaningful for [cd]tors, since they are the only functions where
18940 : : there is a significant distinction between the main body and any
18941 : : function catch clauses. Handling, say, main() return semantics here
18942 : : would be wrong, as flowing off the end of a function catch clause for
18943 : : main() would also need to return 0. */
18944 : :
18945 : : void
18946 : 106497037 : finish_function_body (tree compstmt)
18947 : : {
18948 : 106497037 : if (compstmt == NULL_TREE)
18949 : : return;
18950 : :
18951 : : /* Close the block. */
18952 : 20926637 : finish_compound_stmt (compstmt);
18953 : :
18954 : 20926637 : if (processing_template_decl)
18955 : : /* Do nothing now. */;
18956 : 6723146 : else if (DECL_CONSTRUCTOR_P (current_function_decl)
18957 : 6723146 : || DECL_DESTRUCTOR_P (current_function_decl))
18958 : 6353281 : maybe_return_this ();
18959 : : }
18960 : :
18961 : : /* Given a function, returns the BLOCK corresponding to the outermost level
18962 : : of curly braces, skipping the artificial block created for constructor
18963 : : initializers. */
18964 : :
18965 : : tree
18966 : 285760 : outer_curly_brace_block (tree fndecl)
18967 : : {
18968 : 285760 : tree block = DECL_INITIAL (fndecl);
18969 : 285760 : if (BLOCK_OUTER_CURLY_BRACE_P (block))
18970 : : return block;
18971 : 157 : block = BLOCK_SUBBLOCKS (block);
18972 : 157 : if (BLOCK_OUTER_CURLY_BRACE_P (block))
18973 : : return block;
18974 : 0 : block = BLOCK_SUBBLOCKS (block);
18975 : 0 : gcc_assert (BLOCK_OUTER_CURLY_BRACE_P (block));
18976 : : return block;
18977 : : }
18978 : :
18979 : : /* If FNDECL is a class's key method, add the class to the list of
18980 : : keyed classes that should be emitted. */
18981 : :
18982 : : static void
18983 : 132652869 : record_key_method_defined (tree fndecl)
18984 : : {
18985 : 179764823 : if (DECL_OBJECT_MEMBER_FUNCTION_P (fndecl)
18986 : 85558304 : && DECL_VIRTUAL_P (fndecl)
18987 : 135087775 : && !processing_template_decl)
18988 : : {
18989 : 1160252 : tree fnclass = DECL_CONTEXT (fndecl);
18990 : 1160252 : if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
18991 : : {
18992 : 1608 : tree classdecl = TYPE_NAME (fnclass);
18993 : : /* Classes attached to a named module are already handled. */
18994 : 1608 : if (!DECL_LANG_SPECIFIC (classdecl)
18995 : 1656 : || !DECL_MODULE_ATTACH_P (classdecl))
18996 : 1563 : vec_safe_push (keyed_classes, fnclass);
18997 : : }
18998 : : }
18999 : 132652869 : }
19000 : :
19001 : : /* Attempt to add a fix-it hint to RICHLOC suggesting the insertion
19002 : : of "return *this;" immediately before its location, using FNDECL's
19003 : : first statement (if any) to give the indentation, if appropriate. */
19004 : :
19005 : : static void
19006 : 18 : add_return_star_this_fixit (gcc_rich_location *richloc, tree fndecl)
19007 : : {
19008 : 18 : location_t indent = UNKNOWN_LOCATION;
19009 : 18 : tree stmts = expr_first (DECL_SAVED_TREE (fndecl));
19010 : 18 : if (stmts)
19011 : 9 : indent = EXPR_LOCATION (stmts);
19012 : 18 : richloc->add_fixit_insert_formatted ("return *this;",
19013 : : richloc->get_loc (),
19014 : : indent);
19015 : 18 : }
19016 : :
19017 : : /* Finish up a function declaration and compile that function
19018 : : all the way to assembler language output. The free the storage
19019 : : for the function definition. INLINE_P is TRUE if we just
19020 : : finished processing the body of an in-class inline function
19021 : : definition. (This processing will have taken place after the
19022 : : class definition is complete.) */
19023 : :
19024 : : tree
19025 : 132649010 : finish_function (bool inline_p)
19026 : : {
19027 : 132649010 : tree fndecl = current_function_decl;
19028 : 132649010 : tree fntype, ctype = NULL_TREE;
19029 : 132649010 : tree resumer = NULL_TREE, destroyer = NULL_TREE;
19030 : :
19031 : : /* When we get some parse errors, we can end up without a
19032 : : current_function_decl, so cope. */
19033 : 132649010 : if (fndecl == NULL_TREE || fndecl == error_mark_node)
19034 : 0 : return error_mark_node;
19035 : :
19036 : 132649010 : bool do_contracts = (DECL_HAS_CONTRACTS_P (fndecl)
19037 : 132649010 : && !processing_template_decl);
19038 : :
19039 : 132649010 : if (!DECL_OMP_DECLARE_REDUCTION_P (fndecl))
19040 : 132648442 : finish_lambda_scope ();
19041 : :
19042 : 132649010 : if (c_dialect_objc ())
19043 : 0 : objc_finish_function ();
19044 : :
19045 : 132649010 : record_key_method_defined (fndecl);
19046 : :
19047 : 132649010 : fntype = TREE_TYPE (fndecl);
19048 : :
19049 : : /* TREE_READONLY (fndecl) = 1;
19050 : : This caused &foo to be of type ptr-to-const-function
19051 : : which then got a warning when stored in a ptr-to-function variable. */
19052 : :
19053 : 132649010 : gcc_assert (building_stmt_list_p ());
19054 : : /* The current function is being defined, so its DECL_INITIAL should
19055 : : be set, and unless there's a multiple definition, it should be
19056 : : error_mark_node. */
19057 : 132649010 : gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
19058 : :
19059 : 132649010 : cp_coroutine_transform *coroutine = nullptr;
19060 : 132649010 : if (flag_coroutines
19061 : 38465945 : && !processing_template_decl
19062 : 16476560 : && DECL_COROUTINE_P (fndecl)
19063 : 132650384 : && !DECL_RAMP_FN (fndecl))
19064 : : {
19065 : 1374 : gcc_checking_assert (!DECL_CLONED_FUNCTION_P (fndecl)
19066 : : && !DECL_DEFAULTED_FN (fndecl));
19067 : 1374 : coroutine = new cp_coroutine_transform (fndecl, inline_p);
19068 : 1374 : if (coroutine && coroutine->cp_valid_coroutine ())
19069 : 1374 : coroutine->apply_transforms ();
19070 : :
19071 : : /* We should handle coroutine IFNs in middle end lowering. */
19072 : 1374 : cfun->coroutine_component = true;
19073 : :
19074 : : /* Do not try to process the ramp's EH unless outlining succeeded. */
19075 : 1374 : if (coroutine->cp_valid_coroutine () && use_eh_spec_block (fndecl))
19076 : 389 : finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
19077 : : (TREE_TYPE (fndecl)),
19078 : 389 : current_eh_spec_block);
19079 : :
19080 : : /* If outlining succeeded, then add contracts handling if needed. */
19081 : 1374 : if (coroutine->cp_valid_coroutine () && do_contracts)
19082 : 2 : maybe_apply_function_contracts (fndecl);
19083 : : }
19084 : : else
19085 : : /* For a cloned function, we've already got all the code we need;
19086 : : there's no need to add any extra bits. */
19087 : 132647636 : if (!DECL_CLONED_FUNCTION_P (fndecl))
19088 : : {
19089 : : /* Make it so that `main' always returns 0 by default. */
19090 : 119669295 : if (DECL_MAIN_FREESTANDING_P (current_function_decl)
19091 : 119700975 : && !TREE_THIS_VOLATILE (current_function_decl))
19092 : 31680 : finish_return_stmt (integer_zero_node);
19093 : :
19094 : 119669295 : if (use_eh_spec_block (current_function_decl))
19095 : 17288679 : finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
19096 : : (TREE_TYPE (current_function_decl)),
19097 : 17288679 : current_eh_spec_block);
19098 : :
19099 : 119669295 : if (do_contracts)
19100 : 417 : maybe_apply_function_contracts (current_function_decl);
19101 : :
19102 : : }
19103 : :
19104 : : /* If we're saving up tree structure, tie off the function now. */
19105 : 132649010 : DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
19106 : :
19107 : 132649010 : finish_fname_decls ();
19108 : :
19109 : : /* This must come after expand_function_end because cleanups might
19110 : : have declarations (from inline functions) that need to go into
19111 : : this function's blocks. */
19112 : :
19113 : : /* If the current binding level isn't the outermost binding level
19114 : : for this function, either there is a bug, or we have experienced
19115 : : syntax errors and the statement tree is malformed. */
19116 : 132649010 : if (current_binding_level->kind != sk_function_parms)
19117 : : {
19118 : : /* Make sure we have already experienced errors. */
19119 : 7 : gcc_assert (errorcount);
19120 : :
19121 : : /* Throw away the broken statement tree and extra binding
19122 : : levels. */
19123 : 7 : DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
19124 : :
19125 : 18 : while (current_binding_level->kind != sk_function_parms)
19126 : : {
19127 : 11 : if (current_binding_level->kind == sk_class)
19128 : 0 : pop_nested_class ();
19129 : : else
19130 : 11 : poplevel (0, 0, 0);
19131 : : }
19132 : : }
19133 : 132649010 : poplevel (1, 0, 1);
19134 : :
19135 : : /* Statements should always be full-expressions at the outermost set
19136 : : of curly braces for a function. */
19137 : 132649010 : gcc_assert (stmts_are_full_exprs_p ());
19138 : :
19139 : : /* If there are no return statements in a function with auto return type,
19140 : : the return type is void. But if the declared type is something like
19141 : : auto*, this is an error. */
19142 : 52129199 : if (!processing_template_decl && FNDECL_USED_AUTO (fndecl)
19143 : 133256656 : && TREE_TYPE (fntype) == DECL_SAVED_AUTO_RETURN_TYPE (fndecl))
19144 : : {
19145 : 181032 : if (is_auto (DECL_SAVED_AUTO_RETURN_TYPE (fndecl))
19146 : 181017 : && !current_function_returns_value
19147 : 181032 : && !current_function_returns_null)
19148 : : {
19149 : : /* We haven't applied return type deduction because we haven't
19150 : : seen any return statements. Do that now. */
19151 : 180840 : tree node = type_uses_auto (DECL_SAVED_AUTO_RETURN_TYPE (fndecl));
19152 : 180840 : do_auto_deduction (DECL_SAVED_AUTO_RETURN_TYPE (fndecl),
19153 : : void_node, node, tf_warning_or_error,
19154 : : adc_return_type);
19155 : :
19156 : 180840 : apply_deduced_return_type (fndecl, void_type_node);
19157 : 180840 : fntype = TREE_TYPE (fndecl);
19158 : : }
19159 : 192 : else if (!current_function_returns_value
19160 : 192 : && !current_function_returns_null)
19161 : : {
19162 : 6 : auto_diagnostic_group d;
19163 : 12 : error ("no return statements in function returning %qT",
19164 : 6 : DECL_SAVED_AUTO_RETURN_TYPE (fndecl));
19165 : 6 : inform (input_location, "only plain %<auto%> return type can be "
19166 : : "deduced to %<void%>");
19167 : 6 : }
19168 : : }
19169 : :
19170 : : /* Remember that we were in class scope. */
19171 : 132649010 : if (current_class_name)
19172 : 98101026 : ctype = current_class_type;
19173 : :
19174 : 132649010 : if (DECL_DELETED_FN (fndecl))
19175 : : {
19176 : 75 : DECL_INITIAL (fndecl) = error_mark_node;
19177 : 75 : DECL_SAVED_TREE (fndecl) = NULL_TREE;
19178 : 75 : goto cleanup;
19179 : : }
19180 : :
19181 : 132648935 : if (flag_openmp)
19182 : 111937 : if (tree attr = lookup_attribute ("omp declare variant base",
19183 : 111937 : DECL_ATTRIBUTES (fndecl)))
19184 : 112 : omp_declare_variant_finalize (fndecl, attr);
19185 : :
19186 : : /* Complain if there's just no return statement. */
19187 : 132648935 : if ((warn_return_type
19188 : 40952 : || (cxx_dialect >= cxx14
19189 : 32918 : && DECL_DECLARED_CONSTEXPR_P (fndecl)))
19190 : 132617544 : && !VOID_TYPE_P (TREE_TYPE (fntype))
19191 : 81414683 : && !dependent_type_p (TREE_TYPE (fntype))
19192 : 41947826 : && !current_function_returns_value && !current_function_returns_null
19193 : : /* Don't complain if we abort or throw. */
19194 : : && !current_function_returns_abnormally
19195 : : /* Don't complain if there's an infinite loop. */
19196 : 41947826 : && !current_function_infinite_loop
19197 : : /* Don't complain if we are declared noreturn. */
19198 : 792 : && !TREE_THIS_VOLATILE (fndecl)
19199 : 786 : && !DECL_NAME (DECL_RESULT (fndecl))
19200 : 786 : && !warning_suppressed_p (fndecl, OPT_Wreturn_type)
19201 : : /* Structor return values (if any) are set by the compiler. */
19202 : 1206 : && !DECL_CONSTRUCTOR_P (fndecl)
19203 : 603 : && !DECL_DESTRUCTOR_P (fndecl)
19204 : 132649538 : && targetm.warn_func_return (fndecl))
19205 : : {
19206 : 597 : gcc_rich_location richloc (input_location);
19207 : : /* Potentially add a "return *this;" fix-it hint for
19208 : : assignment operators. */
19209 : 597 : if (IDENTIFIER_ASSIGN_OP_P (DECL_NAME (fndecl)))
19210 : : {
19211 : 39 : tree valtype = TREE_TYPE (DECL_RESULT (fndecl));
19212 : 39 : if (TREE_CODE (valtype) == REFERENCE_TYPE
19213 : 32 : && current_class_ref
19214 : 26 : && same_type_ignoring_top_level_qualifiers_p
19215 : 26 : (TREE_TYPE (valtype), TREE_TYPE (current_class_ref))
19216 : 71 : && global_dc->option_enabled_p (OPT_Wreturn_type))
19217 : 18 : add_return_star_this_fixit (&richloc, fndecl);
19218 : : }
19219 : 597 : if (cxx_dialect >= cxx14
19220 : 597 : && DECL_DECLARED_CONSTEXPR_P (fndecl))
19221 : 2 : error_at (&richloc, "no return statement in %<constexpr%> function "
19222 : : "returning non-void");
19223 : 595 : else if (warning_at (&richloc, OPT_Wreturn_type,
19224 : : "no return statement in function returning "
19225 : : "non-void"))
19226 : 159 : suppress_warning (fndecl, OPT_Wreturn_type);
19227 : 597 : }
19228 : :
19229 : : /* Lambda closure members are implicitly constexpr if possible. */
19230 : 132648935 : if (cxx_dialect >= cxx17
19231 : 227138289 : && LAMBDA_TYPE_P (CP_DECL_CONTEXT (fndecl)))
19232 : 962781 : DECL_DECLARED_CONSTEXPR_P (fndecl)
19233 : 962781 : = ((processing_template_decl
19234 : 428290 : || is_valid_constexpr_fn (fndecl, /*complain*/false))
19235 : 1924985 : && potential_constant_expression (DECL_SAVED_TREE (fndecl)));
19236 : :
19237 : : /* Save constexpr function body before it gets munged by
19238 : : the NRV transformation. */
19239 : 132648935 : maybe_save_constexpr_fundef (fndecl);
19240 : :
19241 : : /* Invoke the pre-genericize plugin before we start munging things. */
19242 : 132648935 : if (!processing_template_decl)
19243 : 52129124 : invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
19244 : :
19245 : : /* Perform delayed folding before NRV transformation. */
19246 : 132648935 : if (!processing_template_decl
19247 : 104258248 : && !DECL_IMMEDIATE_FUNCTION_P (fndecl)
19248 : 184635355 : && !DECL_OMP_DECLARE_REDUCTION_P (fndecl))
19249 : 51985982 : cp_fold_function (fndecl);
19250 : :
19251 : : /* Set up the named return value optimization, if we can. Candidate
19252 : : variables are selected in check_return_expr. */
19253 : 132648935 : if (tree r = current_function_return_value)
19254 : : {
19255 : 32333781 : if (r != error_mark_node)
19256 : 165401 : finalize_nrv (fndecl, r);
19257 : 32333781 : current_function_return_value = NULL_TREE;
19258 : : }
19259 : :
19260 : : /* Must mark the RESULT_DECL as being in this function. */
19261 : 132648935 : DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
19262 : :
19263 : : /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
19264 : : to the FUNCTION_DECL node itself. */
19265 : 132648935 : BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
19266 : :
19267 : : /* Store the end of the function, so that we get good line number
19268 : : info for the epilogue. */
19269 : 132648935 : cfun->function_end_locus = input_location;
19270 : :
19271 : : /* Complain about parameters that are only set, but never otherwise used. */
19272 : 132648935 : if (warn_unused_but_set_parameter
19273 : 892045 : && !processing_template_decl
19274 : 455804 : && errorcount == unused_but_set_errorcount
19275 : 133104739 : && !DECL_CLONED_FUNCTION_P (fndecl))
19276 : : {
19277 : 356574 : tree decl;
19278 : :
19279 : 356574 : for (decl = DECL_ARGUMENTS (fndecl);
19280 : 955816 : decl;
19281 : 599242 : decl = DECL_CHAIN (decl))
19282 : 599242 : if (TREE_USED (decl)
19283 : 599242 : && TREE_CODE (decl) == PARM_DECL
19284 : 495545 : && !DECL_READ_P (decl)
19285 : 6 : && DECL_NAME (decl)
19286 : 6 : && !DECL_ARTIFICIAL (decl)
19287 : 6 : && !warning_suppressed_p (decl,OPT_Wunused_but_set_parameter)
19288 : 6 : && !DECL_IN_SYSTEM_HEADER (decl)
19289 : 6 : && TREE_TYPE (decl) != error_mark_node
19290 : 6 : && !TYPE_REF_P (TREE_TYPE (decl))
19291 : 599248 : && (!CLASS_TYPE_P (TREE_TYPE (decl))
19292 : 0 : || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
19293 : 6 : warning_at (DECL_SOURCE_LOCATION (decl),
19294 : : OPT_Wunused_but_set_parameter,
19295 : : "parameter %qD set but not used", decl);
19296 : 356574 : unused_but_set_errorcount = errorcount;
19297 : : }
19298 : :
19299 : : /* Complain about locally defined typedefs that are not used in this
19300 : : function. */
19301 : 132648935 : maybe_warn_unused_local_typedefs ();
19302 : :
19303 : : /* Possibly warn about unused parameters. */
19304 : 132648935 : if (warn_unused_parameter
19305 : 622774 : && !processing_template_decl
19306 : 132947263 : && !DECL_CLONED_FUNCTION_P (fndecl))
19307 : 228852 : do_warn_unused_parameter (fndecl);
19308 : :
19309 : : /* Genericize before inlining. */
19310 : 132648935 : if (!processing_template_decl
19311 : 104258248 : && !DECL_IMMEDIATE_FUNCTION_P (fndecl)
19312 : 184635205 : && !DECL_OMP_DECLARE_REDUCTION_P (fndecl))
19313 : 51985832 : cp_genericize (fndecl);
19314 : :
19315 : : /* If this function can't throw any exceptions, remember that. */
19316 : 132648935 : if (!processing_template_decl
19317 : 52129124 : && !cp_function_chain->can_throw
19318 : 39510417 : && !flag_non_call_exceptions
19319 : 172154848 : && !decl_replaceable_p (fndecl,
19320 : 39505913 : opt_for_fn (fndecl, flag_semantic_interposition)))
19321 : 39263502 : TREE_NOTHROW (fndecl) = 1;
19322 : :
19323 : 132649010 : cleanup:
19324 : :
19325 : : /* We're leaving the context of this function, so zap cfun. It's still in
19326 : : DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
19327 : 132649010 : set_cfun (NULL);
19328 : 132649010 : current_function_decl = NULL;
19329 : :
19330 : : /* If this is an in-class inline definition, we may have to pop the
19331 : : bindings for the template parameters that we added in
19332 : : maybe_begin_member_template_processing when start_function was
19333 : : called. */
19334 : 132649010 : if (inline_p)
19335 : 64892552 : maybe_end_member_template_processing ();
19336 : :
19337 : : /* Leave the scope of the class. */
19338 : 132649010 : if (ctype)
19339 : 98101026 : pop_nested_class ();
19340 : :
19341 : 132649010 : --function_depth;
19342 : :
19343 : : /* Clean up. */
19344 : 132649010 : invoke_plugin_callbacks (PLUGIN_FINISH_PARSE_FUNCTION, fndecl);
19345 : :
19346 : : /* Build outlined functions for coroutines and contracts. */
19347 : :
19348 : 132649010 : if (coroutine)
19349 : : {
19350 : : /* Emit the resumer and destroyer functions now, providing that we have
19351 : : not encountered some fatal error. */
19352 : 1374 : if (coroutine->cp_valid_coroutine ())
19353 : : {
19354 : 1343 : coroutine->finish_transforms ();
19355 : 1343 : resumer = coroutine->get_resumer ();
19356 : 1343 : destroyer = coroutine->get_destroyer ();
19357 : 1343 : expand_or_defer_fn (resumer);
19358 : 1343 : expand_or_defer_fn (destroyer);
19359 : : }
19360 : 1374 : delete coroutine;
19361 : : }
19362 : :
19363 : : /* If we have used outlined contracts checking functions, build and emit
19364 : : them here. */
19365 : 132649010 : finish_function_contracts (fndecl);
19366 : :
19367 : 132649010 : return fndecl;
19368 : : }
19369 : :
19370 : : /* Create the FUNCTION_DECL for a function definition.
19371 : : DECLSPECS and DECLARATOR are the parts of the declaration;
19372 : : they describe the return type and the name of the function,
19373 : : but twisted together in a fashion that parallels the syntax of C.
19374 : :
19375 : : This function creates a binding context for the function body
19376 : : as well as setting up the FUNCTION_DECL in current_function_decl.
19377 : :
19378 : : Returns a FUNCTION_DECL on success.
19379 : :
19380 : : If the DECLARATOR is not suitable for a function (it defines a datum
19381 : : instead), we return 0, which tells yyparse to report a parse error.
19382 : :
19383 : : May return void_type_node indicating that this method is actually
19384 : : a friend. See grokfield for more details.
19385 : :
19386 : : Came here with a `.pushlevel' .
19387 : :
19388 : : DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
19389 : : CHANGES TO CODE IN `grokfield'. */
19390 : :
19391 : : tree
19392 : 64657009 : grokmethod (cp_decl_specifier_seq *declspecs,
19393 : : const cp_declarator *declarator, tree attrlist)
19394 : : {
19395 : 64657009 : tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
19396 : 64657009 : &attrlist);
19397 : :
19398 : 64657009 : if (fndecl == error_mark_node)
19399 : : return error_mark_node;
19400 : :
19401 : 64656909 : if (attrlist)
19402 : 0 : cplus_decl_attributes (&fndecl, attrlist, 0);
19403 : :
19404 : : /* Pass friends other than inline friend functions back. */
19405 : 64656909 : if (fndecl == void_type_node)
19406 : : return fndecl;
19407 : :
19408 : 64656909 : if (DECL_IN_AGGR_P (fndecl))
19409 : : {
19410 : 0 : if (DECL_CLASS_SCOPE_P (fndecl))
19411 : 0 : error ("%qD is already defined in class %qT", fndecl,
19412 : 0 : DECL_CONTEXT (fndecl));
19413 : 0 : return error_mark_node;
19414 : : }
19415 : :
19416 : 64656909 : check_template_shadow (fndecl);
19417 : :
19418 : : /* p1779 ABI-Isolation makes inline not a default for in-class
19419 : : definitions attached to a named module. If the user explicitly
19420 : : made it inline, grokdeclarator will already have done the right
19421 : : things. */
19422 : 64656909 : if ((!named_module_attach_p ()
19423 : 358 : || flag_module_implicit_inline
19424 : : /* Lambda's operator function remains inline. */
19425 : 701 : || LAMBDA_TYPE_P (DECL_CONTEXT (fndecl)))
19426 : : /* If the user explicitly asked for this to be inline, we don't
19427 : : need to do more, but more importantly we want to warn if we
19428 : : can't inline it. */
19429 : 64656591 : && !DECL_DECLARED_INLINE_P (fndecl))
19430 : : {
19431 : 48130527 : if (TREE_PUBLIC (fndecl))
19432 : 47249655 : DECL_COMDAT (fndecl) = 1;
19433 : 48130527 : DECL_DECLARED_INLINE_P (fndecl) = 1;
19434 : : /* It's ok if we can't inline this. */
19435 : 48130527 : DECL_NO_INLINE_WARNING_P (fndecl) = 1;
19436 : : }
19437 : :
19438 : : /* We process method specializations in finish_struct_1. */
19439 : 64656909 : if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
19440 : : {
19441 : : /* Avoid calling decl_spec_seq... until we have to. */
19442 : 53187354 : bool friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
19443 : 53187354 : fndecl = push_template_decl (fndecl, friendp);
19444 : 53187354 : if (fndecl == error_mark_node)
19445 : : return fndecl;
19446 : : }
19447 : :
19448 : 64656902 : if (DECL_CHAIN (fndecl) && !decl_spec_seq_has_spec_p (declspecs, ds_friend))
19449 : : {
19450 : 0 : fndecl = copy_node (fndecl);
19451 : 0 : TREE_CHAIN (fndecl) = NULL_TREE;
19452 : : }
19453 : :
19454 : 64656902 : cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
19455 : :
19456 : 64656902 : DECL_IN_AGGR_P (fndecl) = 1;
19457 : 64656902 : return fndecl;
19458 : : }
19459 : :
19460 : :
19461 : : /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
19462 : : we can lay it out later, when and if its type becomes complete.
19463 : :
19464 : : Also handle constexpr variables where the initializer involves
19465 : : an unlowered PTRMEM_CST because the class isn't complete yet. */
19466 : :
19467 : : void
19468 : 82081287 : maybe_register_incomplete_var (tree var)
19469 : : {
19470 : 82081287 : gcc_assert (VAR_P (var));
19471 : :
19472 : : /* Keep track of variables with incomplete types. */
19473 : 36298804 : if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
19474 : 118378543 : && DECL_EXTERNAL (var))
19475 : : {
19476 : 5383636 : tree inner_type = TREE_TYPE (var);
19477 : :
19478 : 5534898 : while (TREE_CODE (inner_type) == ARRAY_TYPE)
19479 : 151262 : inner_type = TREE_TYPE (inner_type);
19480 : 5383636 : inner_type = TYPE_MAIN_VARIANT (inner_type);
19481 : :
19482 : 5420231 : if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
19483 : : /* RTTI TD entries are created while defining the type_info. */
19484 : 5383636 : || (TYPE_LANG_SPECIFIC (inner_type)
19485 : 2148992 : && TYPE_BEING_DEFINED (inner_type)))
19486 : : {
19487 : 36595 : incomplete_var iv = {var, inner_type};
19488 : 36595 : vec_safe_push (incomplete_vars, iv);
19489 : : }
19490 : 10393109 : else if (!(DECL_LANG_SPECIFIC (var) && DECL_TEMPLATE_INFO (var))
19491 : 3291556 : && DECL_CLASS_SCOPE_P (var)
19492 : 1038660 : && TYPE_BEING_DEFINED (DECL_CONTEXT (var))
19493 : 1038660 : && decl_constant_var_p (var)
19494 : 6023962 : && (TYPE_PTRMEM_P (inner_type) || CLASS_TYPE_P (inner_type)))
19495 : : {
19496 : : /* When the outermost open class is complete we can resolve any
19497 : : pointers-to-members. */
19498 : 13 : tree context = outermost_open_class ();
19499 : 13 : incomplete_var iv = {var, context};
19500 : 13 : vec_safe_push (incomplete_vars, iv);
19501 : : }
19502 : : }
19503 : 82081287 : }
19504 : :
19505 : : /* Called when a class type (given by TYPE) is defined. If there are
19506 : : any existing VAR_DECLs whose type has been completed by this
19507 : : declaration, update them now. */
19508 : :
19509 : : void
19510 : 51067622 : complete_vars (tree type)
19511 : : {
19512 : 51067622 : unsigned ix;
19513 : 51067622 : incomplete_var *iv;
19514 : :
19515 : 51488456 : for (ix = 0; vec_safe_iterate (incomplete_vars, ix, &iv); )
19516 : : {
19517 : 420834 : if (same_type_p (type, iv->incomplete_type))
19518 : : {
19519 : 35491 : tree var = iv->decl;
19520 : 35491 : tree type = TREE_TYPE (var);
19521 : :
19522 : 35491 : if (type != error_mark_node
19523 : 35491 : && (TYPE_MAIN_VARIANT (strip_array_types (type))
19524 : 35488 : == iv->incomplete_type))
19525 : : {
19526 : : /* Complete the type of the variable. */
19527 : 35475 : complete_type (type);
19528 : 35475 : cp_apply_type_quals_to_decl (cp_type_quals (type), var);
19529 : 35475 : if (COMPLETE_TYPE_P (type))
19530 : 35460 : layout_var_decl (var);
19531 : : }
19532 : :
19533 : : /* Remove this entry from the list. */
19534 : 35491 : incomplete_vars->unordered_remove (ix);
19535 : : }
19536 : : else
19537 : 385343 : ix++;
19538 : : }
19539 : 51067622 : }
19540 : :
19541 : : /* If DECL is of a type which needs a cleanup, build and return an
19542 : : expression to perform that cleanup here. Return NULL_TREE if no
19543 : : cleanup need be done. DECL can also be a _REF when called from
19544 : : split_nonconstant_init_1. */
19545 : :
19546 : : tree
19547 : 57282331 : cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
19548 : : {
19549 : 57282331 : tree type;
19550 : 57282331 : tree attr;
19551 : 57282331 : tree cleanup;
19552 : :
19553 : : /* Assume no cleanup is required. */
19554 : 57282331 : cleanup = NULL_TREE;
19555 : :
19556 : 57282331 : if (error_operand_p (decl))
19557 : : return cleanup;
19558 : :
19559 : : /* Handle "__attribute__((cleanup))". We run the cleanup function
19560 : : before the destructor since the destructor is what actually
19561 : : terminates the lifetime of the object. */
19562 : 57282331 : if (DECL_P (decl))
19563 : 56968370 : attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
19564 : : else
19565 : : attr = NULL_TREE;
19566 : 56968370 : if (attr)
19567 : : {
19568 : 157 : tree id;
19569 : 157 : tree fn;
19570 : 157 : tree arg;
19571 : :
19572 : : /* Get the name specified by the user for the cleanup function. */
19573 : 157 : id = TREE_VALUE (TREE_VALUE (attr));
19574 : : /* Look up the name to find the cleanup function to call. It is
19575 : : important to use lookup_name here because that is what is
19576 : : used in c-common.cc:handle_cleanup_attribute when performing
19577 : : initial checks on the attribute. Note that those checks
19578 : : include ensuring that the function found is not an overloaded
19579 : : function, or an object with an overloaded call operator,
19580 : : etc.; we can rely on the fact that the function found is an
19581 : : ordinary FUNCTION_DECL. */
19582 : 157 : fn = lookup_name (id);
19583 : 157 : arg = build_address (decl);
19584 : 157 : if (!mark_used (decl, complain) && !(complain & tf_error))
19585 : 0 : return error_mark_node;
19586 : 157 : cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
19587 : 157 : if (cleanup == error_mark_node)
19588 : : return error_mark_node;
19589 : : }
19590 : : /* Handle ordinary C++ destructors. */
19591 : 57282325 : type = TREE_TYPE (decl);
19592 : 57282325 : if (type_build_dtor_call (type))
19593 : : {
19594 : 5098227 : int flags = LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR;
19595 : 5098227 : tree addr;
19596 : 5098227 : tree call;
19597 : :
19598 : 5098227 : if (TREE_CODE (type) == ARRAY_TYPE)
19599 : : addr = decl;
19600 : : else
19601 : 5096606 : addr = build_address (decl);
19602 : :
19603 : 5098227 : call = build_delete (input_location, TREE_TYPE (addr), addr,
19604 : : sfk_complete_destructor, flags, 0, complain);
19605 : 5098227 : if (call == error_mark_node)
19606 : : cleanup = error_mark_node;
19607 : 5098188 : else if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
19608 : : /* Discard the call. */;
19609 : 3642161 : else if (decl_maybe_constant_destruction (decl, type)
19610 : 3642289 : && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
19611 : 128 : cxx_constant_dtor (call, decl);
19612 : 3642033 : else if (cleanup)
19613 : 3 : cleanup = cp_build_compound_expr (cleanup, call, complain);
19614 : : else
19615 : : cleanup = call;
19616 : : }
19617 : :
19618 : : /* build_delete sets the location of the destructor call to the
19619 : : current location, even though the destructor is going to be
19620 : : called later, at the end of the current scope. This can lead to
19621 : : a "jumpy" behavior for users of debuggers when they step around
19622 : : the end of the block. So let's unset the location of the
19623 : : destructor call instead. */
19624 : 57282325 : protected_set_expr_location (cleanup, UNKNOWN_LOCATION);
19625 : 57282325 : if (cleanup && CONVERT_EXPR_P (cleanup))
19626 : 0 : protected_set_expr_location (TREE_OPERAND (cleanup, 0), UNKNOWN_LOCATION);
19627 : :
19628 : 0 : if (cleanup
19629 : 3642220 : && DECL_P (decl)
19630 : 3641962 : && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl)))
19631 : : /* Treat objects with destructors as used; the destructor may do
19632 : : something substantive. */
19633 : 3641956 : && !mark_used (decl, complain) && !(complain & tf_error))
19634 : 0 : return error_mark_node;
19635 : :
19636 : 3642220 : if (cleanup && cfun && !processing_template_decl
19637 : 60508394 : && !expr_noexcept_p (cleanup, tf_none))
19638 : 4289 : cp_function_chain->throwing_cleanup = true;
19639 : :
19640 : : return cleanup;
19641 : : }
19642 : :
19643 : :
19644 : : /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
19645 : : FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
19646 : : METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
19647 : :
19648 : : tree
19649 : 2456728 : static_fn_type (tree memfntype)
19650 : : {
19651 : 2456728 : tree fntype;
19652 : 2456728 : tree args;
19653 : :
19654 : 2456728 : if (TYPE_PTRMEMFUNC_P (memfntype))
19655 : 20681 : memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
19656 : 2456728 : if (INDIRECT_TYPE_P (memfntype)
19657 : 2157572 : || TREE_CODE (memfntype) == FUNCTION_DECL)
19658 : 2285283 : memfntype = TREE_TYPE (memfntype);
19659 : 2456728 : if (TREE_CODE (memfntype) == FUNCTION_TYPE)
19660 : : return memfntype;
19661 : 504609 : gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
19662 : 504609 : args = TYPE_ARG_TYPES (memfntype);
19663 : 504609 : fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
19664 : 504609 : fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
19665 : 504609 : fntype = (cp_build_type_attribute_variant
19666 : 504609 : (fntype, TYPE_ATTRIBUTES (memfntype)));
19667 : 504609 : fntype = cxx_copy_lang_qualifiers (fntype, memfntype);
19668 : 504609 : return fntype;
19669 : : }
19670 : :
19671 : : /* DECL was originally constructed as a non-static member function,
19672 : : but turned out to be static. Update it accordingly. */
19673 : :
19674 : : void
19675 : 154908 : revert_static_member_fn (tree decl)
19676 : : {
19677 : 154908 : tree stype = static_fn_type (decl);
19678 : 154908 : cp_cv_quals quals = type_memfn_quals (stype);
19679 : 154908 : cp_ref_qualifier rqual = type_memfn_rqual (stype);
19680 : :
19681 : 154908 : if (quals != TYPE_UNQUALIFIED || rqual != REF_QUAL_NONE)
19682 : 9 : stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED, REF_QUAL_NONE);
19683 : :
19684 : 154908 : TREE_TYPE (decl) = stype;
19685 : :
19686 : 154908 : if (DECL_ARGUMENTS (decl))
19687 : 154908 : DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
19688 : 154908 : DECL_STATIC_FUNCTION_P (decl) = 1;
19689 : 154908 : }
19690 : :
19691 : : /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
19692 : : one of the language-independent trees. */
19693 : :
19694 : : enum cp_tree_node_structure_enum
19695 : 29454019976 : cp_tree_node_structure (union lang_tree_node * t)
19696 : : {
19697 : 29454019976 : switch (TREE_CODE (&t->generic))
19698 : : {
19699 : : case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
19700 : 126566696 : case BASELINK: return TS_CP_BASELINK;
19701 : 23459711 : case CONSTRAINT_INFO: return TS_CP_CONSTRAINT_INFO;
19702 : 9355817 : case DEFERRED_NOEXCEPT: return TS_CP_DEFERRED_NOEXCEPT;
19703 : 2877848 : case DEFERRED_PARSE: return TS_CP_DEFERRED_PARSE;
19704 : 1805435381 : case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
19705 : 1770339 : case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
19706 : 325630 : case BINDING_VECTOR: return TS_CP_BINDING_VECTOR;
19707 : 559019506 : case OVERLOAD: return TS_CP_OVERLOAD;
19708 : 793 : case PTRMEM_CST: return TS_CP_PTRMEM;
19709 : 12801786 : case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
19710 : 545126501 : case TEMPLATE_DECL: return TS_CP_TEMPLATE_DECL;
19711 : 1254418927 : case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
19712 : 543705486 : case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
19713 : 12858008 : case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
19714 : 2347308 : case USERDEF_LITERAL: return TS_CP_USERDEF_LITERAL;
19715 : 24553950239 : default: return TS_CP_GENERIC;
19716 : : }
19717 : : }
19718 : :
19719 : : bool
19720 : 13631 : cp_missing_noreturn_ok_p (tree decl)
19721 : : {
19722 : : /* A missing noreturn is ok for the `main' function. */
19723 : 13631 : return DECL_MAIN_P (decl);
19724 : : }
19725 : :
19726 : : /* Return the decl used to identify the COMDAT group into which DECL should
19727 : : be placed. */
19728 : :
19729 : : tree
19730 : 73521593 : cxx_comdat_group (tree decl)
19731 : : {
19732 : : /* Virtual tables, construction virtual tables, and virtual table
19733 : : tables all go in a single COMDAT group, named after the primary
19734 : : virtual table. */
19735 : 73521593 : if (VAR_P (decl) && DECL_VTABLE_OR_VTT_P (decl))
19736 : 405372 : decl = CLASSTYPE_VTABLES (DECL_CONTEXT (decl));
19737 : : /* For all other DECLs, the COMDAT group is the mangled name of the
19738 : : declaration itself. */
19739 : : else
19740 : : {
19741 : 73116221 : while (DECL_THUNK_P (decl))
19742 : : {
19743 : : /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
19744 : : into the same section as the target function. In that case
19745 : : we must return target's name. */
19746 : 0 : tree target = THUNK_TARGET (decl);
19747 : 0 : if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
19748 : 0 : && DECL_SECTION_NAME (target) != NULL
19749 : 0 : && DECL_ONE_ONLY (target))
19750 : : decl = target;
19751 : : else
19752 : : break;
19753 : : }
19754 : : /* If a ctor/dtor has already set the comdat group by
19755 : : maybe_clone_body, don't override it. */
19756 : 73116221 : if (SUPPORTS_ONE_ONLY
19757 : 73116221 : && TREE_CODE (decl) == FUNCTION_DECL
19758 : 73116221 : && DECL_CLONED_FUNCTION_P (decl))
19759 : 14250423 : if (tree comdat = DECL_COMDAT_GROUP (decl))
19760 : : return comdat;
19761 : : }
19762 : :
19763 : : return decl;
19764 : : }
19765 : :
19766 : : /* Returns the return type for FN as written by the user, which may include
19767 : : a placeholder for a deduced return type. */
19768 : :
19769 : : tree
19770 : 448800467 : fndecl_declared_return_type (tree fn)
19771 : : {
19772 : 448800467 : fn = STRIP_TEMPLATE (fn);
19773 : 448800467 : if (FNDECL_USED_AUTO (fn))
19774 : 4142 : return DECL_SAVED_AUTO_RETURN_TYPE (fn);
19775 : :
19776 : 448796325 : return TREE_TYPE (TREE_TYPE (fn));
19777 : : }
19778 : :
19779 : : /* Returns true iff DECL is a variable or function declared with an auto type
19780 : : that has not yet been deduced to a real type. */
19781 : :
19782 : : bool
19783 : 752532300 : undeduced_auto_decl (tree decl)
19784 : : {
19785 : 752532300 : if (cxx_dialect < cxx11)
19786 : : return false;
19787 : 750333024 : STRIP_ANY_LOCATION_WRAPPER (decl);
19788 : 331641078 : return ((VAR_OR_FUNCTION_DECL_P (decl)
19789 : 68155054 : || TREE_CODE (decl) == TEMPLATE_DECL)
19790 : 1014046760 : && type_uses_auto (TREE_TYPE (decl)));
19791 : : }
19792 : :
19793 : : /* Complain if DECL has an undeduced return type. */
19794 : :
19795 : : bool
19796 : 288956411 : require_deduced_type (tree decl, tsubst_flags_t complain)
19797 : : {
19798 : 288956411 : if (undeduced_auto_decl (decl))
19799 : : {
19800 : 2337 : if (TREE_CODE (decl) == FUNCTION_DECL
19801 : 2310 : && fndecl_built_in_p (decl, BUILT_IN_FRONTEND)
19802 : 4442 : && DECL_FE_FUNCTION_CODE (decl) == CP_BUILT_IN_SOURCE_LOCATION)
19803 : : {
19804 : : /* Set the return type of __builtin_source_location. */
19805 : 2105 : tree type = get_source_location_impl_type ();
19806 : 2105 : if (type == error_mark_node)
19807 : : {
19808 : 33 : inform (input_location, "using %qs", "__builtin_source_location");
19809 : 33 : return false;
19810 : : }
19811 : 2072 : type = cp_build_qualified_type (type, TYPE_QUAL_CONST);
19812 : 2072 : type = build_pointer_type (type);
19813 : 2072 : apply_deduced_return_type (decl, type);
19814 : 2072 : return true;
19815 : : }
19816 : :
19817 : 232 : if (warning_suppressed_p (decl) && seen_error ())
19818 : : /* We probably already complained about deduction failure. */;
19819 : 99 : else if (complain & tf_error)
19820 : 75 : error ("use of %qD before deduction of %<auto%>", decl);
19821 : 232 : note_failed_type_completion_for_satisfaction (decl);
19822 : 232 : return false;
19823 : : }
19824 : : return true;
19825 : : }
19826 : :
19827 : : /* Create a representation of the explicit-specifier with
19828 : : constant-expression of EXPR. COMPLAIN is as for tsubst. */
19829 : :
19830 : : tree
19831 : 5731565 : build_explicit_specifier (tree expr, tsubst_flags_t complain)
19832 : : {
19833 : 5731565 : if (check_for_bare_parameter_packs (expr))
19834 : 3 : return error_mark_node;
19835 : :
19836 : 5731562 : if (instantiation_dependent_expression_p (expr))
19837 : : /* Wait for instantiation, tsubst_function_decl will handle it. */
19838 : : return expr;
19839 : :
19840 : 5277298 : expr = build_converted_constant_bool_expr (expr, complain);
19841 : 5277298 : expr = instantiate_non_dependent_expr (expr, complain);
19842 : 5277298 : expr = cxx_constant_value (expr, complain);
19843 : 5277298 : return expr;
19844 : : }
19845 : :
19846 : : #include "gt-cp-decl.h"
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