Line data Source code
1 : /* Process declarations and variables for C++ compiler.
2 : Copyright (C) 1988-2026 Free Software Foundation, Inc.
3 : Hacked 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 "memmodel.h"
33 : #include "target.h"
34 : #include "cp-tree.h"
35 : #include "c-family/c-common.h"
36 : #include "timevar.h"
37 : #include "stringpool.h"
38 : #include "cgraph.h"
39 : #include "varasm.h"
40 : #include "attribs.h"
41 : #include "stor-layout.h"
42 : #include "calls.h"
43 : #include "decl.h"
44 : #include "toplev.h"
45 : #include "c-family/c-objc.h"
46 : #include "c-family/c-pragma.h"
47 : #include "dumpfile.h"
48 : #include "intl.h"
49 : #include "c-family/c-ada-spec.h"
50 : #include "asan.h"
51 : #include "optabs-query.h"
52 : #include "omp-general.h"
53 : #include "tree-inline.h"
54 : #include "escaped_string.h"
55 : #include "gcc-rich-location.h"
56 : #include "tree-pretty-print-markup.h"
57 : #include "contracts.h"
58 :
59 : /* Id for dumping the raw trees. */
60 : int raw_dump_id;
61 :
62 : extern cpp_reader *parse_in;
63 :
64 : static tree start_objects (bool, unsigned, bool, bool);
65 : static tree finish_objects (bool, unsigned, tree, bool = true);
66 : static tree start_partial_init_fini_fn (bool, unsigned, unsigned, bool);
67 : static void finish_partial_init_fini_fn (tree);
68 : static tree emit_partial_init_fini_fn (bool, unsigned, tree,
69 : unsigned, location_t, tree);
70 : static void one_static_initialization_or_destruction (bool, tree, tree, bool);
71 : static void generate_ctor_or_dtor_function (bool, unsigned, tree, location_t,
72 : bool);
73 : static tree prune_vars_needing_no_initialization (tree *);
74 : static void write_out_vars (tree);
75 : static void import_export_class (tree);
76 : static tree get_guard_bits (tree);
77 : static void determine_visibility_from_class (tree, tree);
78 : static bool determine_hidden_inline (tree);
79 :
80 : /* A list of static class variables. This is needed, because a
81 : static class variable can be declared inside the class without
82 : an initializer, and then initialized, statically, outside the class. */
83 : static GTY(()) vec<tree, va_gc> *pending_statics;
84 :
85 : /* A list of functions which were declared inline, but which we
86 : may need to emit outline anyway. */
87 : static GTY(()) vec<tree, va_gc> *deferred_fns;
88 :
89 : /* A list of decls that use types with no linkage, which we need to make
90 : sure are defined. */
91 : static GTY(()) vec<tree, va_gc> *no_linkage_decls;
92 :
93 : /* A vector of alternating decls and identifiers, where the latter
94 : is to be an alias for the former if the former is defined. */
95 : static GTY(()) vec<tree, va_gc> *mangling_aliases;
96 :
97 : /* hash traits for declarations. Hashes single decls via
98 : DECL_ASSEMBLER_NAME_RAW. */
99 :
100 : struct mangled_decl_hash : ggc_remove <tree>
101 : {
102 : typedef tree value_type; /* A DECL. */
103 : typedef tree compare_type; /* An identifier. */
104 :
105 645923370 : static hashval_t hash (const value_type decl)
106 : {
107 645923370 : return IDENTIFIER_HASH_VALUE (DECL_ASSEMBLER_NAME_RAW (decl));
108 : }
109 642724186 : static bool equal (const value_type existing, compare_type candidate)
110 : {
111 642724186 : tree name = DECL_ASSEMBLER_NAME_RAW (existing);
112 642724186 : return candidate == name;
113 : }
114 :
115 : static const bool empty_zero_p = true;
116 18 : static inline void mark_empty (value_type &p) {p = NULL_TREE;}
117 : static inline bool is_empty (value_type p) {return !p;}
118 :
119 834249974 : static bool is_deleted (value_type e)
120 : {
121 834249974 : return e == reinterpret_cast <value_type> (1);
122 : }
123 75 : static void mark_deleted (value_type &e)
124 : {
125 75 : e = reinterpret_cast <value_type> (1);
126 : }
127 : };
128 :
129 : /* A hash table of decls keyed by mangled name. Used to figure out if
130 : we need compatibility aliases. */
131 : static GTY(()) hash_table<mangled_decl_hash> *mangled_decls;
132 :
133 : // Hash table mapping priority to lists of variables or functions.
134 : struct priority_map_traits
135 : {
136 : typedef unsigned key_type;
137 : typedef tree value_type;
138 : static const bool maybe_mx = true;
139 : static hashval_t hash (key_type v)
140 : {
141 : return hashval_t (v);
142 : }
143 : static bool equal_keys (key_type k1, key_type k2)
144 : {
145 : return k1 == k2;
146 : }
147 : template <typename T> static void remove (T &)
148 : {
149 : }
150 : // Zero is not a priority
151 : static const bool empty_zero_p = true;
152 516875 : template <typename T> static bool is_empty (const T &entry)
153 : {
154 516875 : return entry.m_key == 0;
155 : }
156 0 : template <typename T> static void mark_empty (T &entry)
157 : {
158 0 : entry.m_key = 0;
159 : }
160 : // Entries are not deleteable
161 : template <typename T> static bool is_deleted (const T &)
162 : {
163 : return false;
164 : }
165 : template <typename T> static void mark_deleted (T &)
166 : {
167 : gcc_unreachable ();
168 : }
169 : };
170 :
171 : typedef hash_map<unsigned/*Priority*/, tree/*List*/,
172 : priority_map_traits> priority_map_t;
173 :
174 : /* Two pairs of such hash tables, for the host and an OpenMP offload device.
175 : Each pair has one priority map for fini and one for init. The fini tables
176 : are only ever used when !cxa_atexit. */
177 : static GTY(()) priority_map_t *static_init_fini_fns[4];
178 :
179 : /* Nonzero if we're done parsing and into end-of-file activities.
180 : 2 if all templates have been instantiated.
181 : 3 if we're done with front-end processing. */
182 :
183 : int at_eof;
184 :
185 : /* True if note_mangling_alias should enqueue mangling aliases for
186 : later generation, rather than emitting them right away. */
187 :
188 : bool defer_mangling_aliases = true;
189 :
190 :
191 : /* Return a member function type (a METHOD_TYPE), given FNTYPE (a
192 : FUNCTION_TYPE), CTYPE (class type), and QUALS (the cv-qualifiers
193 : that apply to the function). */
194 :
195 : tree
196 100971918 : build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals,
197 : cp_ref_qualifier rqual)
198 : {
199 100971918 : if (fntype == error_mark_node || ctype == error_mark_node)
200 : return error_mark_node;
201 :
202 100971915 : gcc_assert (FUNC_OR_METHOD_TYPE_P (fntype));
203 :
204 100971915 : cp_cv_quals type_quals = quals & ~TYPE_QUAL_RESTRICT;
205 100971915 : ctype = cp_build_qualified_type (ctype, type_quals);
206 :
207 100971915 : tree newtype
208 100971915 : = build_method_type_directly (ctype, TREE_TYPE (fntype),
209 100971915 : (TREE_CODE (fntype) == METHOD_TYPE
210 57965 : ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
211 100913950 : : TYPE_ARG_TYPES (fntype)));
212 100971915 : if (tree attrs = TYPE_ATTRIBUTES (fntype))
213 71 : newtype = cp_build_type_attribute_variant (newtype, attrs);
214 302915745 : newtype = build_cp_fntype_variant (newtype, rqual,
215 100971915 : TYPE_RAISES_EXCEPTIONS (fntype),
216 100971915 : TYPE_HAS_LATE_RETURN_TYPE (fntype));
217 :
218 100971915 : return newtype;
219 : }
220 :
221 : /* Return a variant of FNTYPE, a FUNCTION_TYPE or METHOD_TYPE, with its
222 : return type changed to NEW_RET. */
223 :
224 : tree
225 2249047 : change_return_type (tree new_ret, tree fntype)
226 : {
227 2249047 : if (new_ret == error_mark_node)
228 : return fntype;
229 :
230 2249047 : if (same_type_p (new_ret, TREE_TYPE (fntype)))
231 : return fntype;
232 :
233 2249044 : tree newtype;
234 2249044 : tree args = TYPE_ARG_TYPES (fntype);
235 :
236 2249044 : if (TREE_CODE (fntype) == FUNCTION_TYPE)
237 : {
238 1233195 : newtype = build_function_type (new_ret, args,
239 411065 : TYPE_NO_NAMED_ARGS_STDARG_P (fntype));
240 411065 : newtype = apply_memfn_quals (newtype,
241 : type_memfn_quals (fntype));
242 : }
243 : else
244 1837979 : newtype = build_method_type_directly
245 1837979 : (class_of_this_parm (fntype), new_ret, TREE_CHAIN (args));
246 :
247 2249044 : if (tree attrs = TYPE_ATTRIBUTES (fntype))
248 92 : newtype = cp_build_type_attribute_variant (newtype, attrs);
249 2249044 : newtype = cxx_copy_lang_qualifiers (newtype, fntype);
250 :
251 2249044 : return newtype;
252 : }
253 :
254 : /* Build a PARM_DECL of FN with NAME and TYPE, and set DECL_ARG_TYPE
255 : appropriately. */
256 :
257 : tree
258 543794629 : cp_build_parm_decl (tree fn, tree name, tree type)
259 : {
260 543794629 : tree parm = build_decl (input_location,
261 : PARM_DECL, name, type);
262 543794629 : DECL_CONTEXT (parm) = fn;
263 :
264 : /* DECL_ARG_TYPE is only used by the back end and the back end never
265 : sees templates. */
266 543794629 : if (!processing_template_decl)
267 193959966 : DECL_ARG_TYPE (parm) = type_passed_as (type);
268 :
269 543794629 : return parm;
270 : }
271 :
272 : /* Returns a PARM_DECL of FN for a parameter of the indicated TYPE, with the
273 : indicated NAME. */
274 :
275 : tree
276 238005904 : build_artificial_parm (tree fn, tree name, tree type)
277 : {
278 238005904 : tree parm = cp_build_parm_decl (fn, name, type);
279 238005904 : DECL_ARTIFICIAL (parm) = 1;
280 : /* All our artificial parms are implicitly `const'; they cannot be
281 : assigned to. */
282 238005904 : TREE_READONLY (parm) = 1;
283 238005904 : return parm;
284 : }
285 :
286 : /* 'structors for types with virtual baseclasses need an "in-charge" flag
287 : saying whether this function is responsible for virtual baseclasses or not.
288 :
289 : This function adds the "in-charge" flag to member function FN if
290 : appropriate. It is called from grokclassfn and tsubst.
291 : FN must be either a constructor or destructor.
292 :
293 : The in-charge flag follows the 'this' parameter, and is followed by the
294 : VTT parm (if any), then the user-written parms. */
295 :
296 : void
297 84492188 : maybe_retrofit_in_chrg (tree fn)
298 : {
299 84492188 : tree basetype, arg_types, parms, parm, fntype;
300 :
301 : /* If we've already add the in-charge parameter don't do it again. */
302 84492188 : if (DECL_HAS_IN_CHARGE_PARM_P (fn))
303 : return;
304 :
305 : /* When processing templates we can't know, in general, whether or
306 : not we're going to have virtual baseclasses. */
307 84492188 : if (processing_template_decl)
308 : return;
309 :
310 : /* We don't need an in-charge parameter for 'structors that don't
311 : have virtual bases. */
312 55656655 : if (!CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
313 : return;
314 :
315 1114542 : arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
316 1114542 : basetype = TREE_TYPE (TREE_VALUE (arg_types));
317 1114542 : arg_types = TREE_CHAIN (arg_types);
318 :
319 1114542 : parms = DECL_CHAIN (DECL_ARGUMENTS (fn));
320 :
321 : /* If this is a subobject constructor or destructor, our caller will
322 : pass us a pointer to our VTT. */
323 1114542 : if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
324 : {
325 1114542 : parm = build_artificial_parm (fn, vtt_parm_identifier, vtt_parm_type);
326 :
327 : /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
328 1114542 : DECL_CHAIN (parm) = parms;
329 1114542 : parms = parm;
330 :
331 : /* ...and then to TYPE_ARG_TYPES. */
332 1114542 : arg_types = hash_tree_chain (vtt_parm_type, arg_types);
333 :
334 1114542 : DECL_HAS_VTT_PARM_P (fn) = 1;
335 : }
336 :
337 : /* Then add the in-charge parm (before the VTT parm). */
338 1114542 : parm = build_artificial_parm (fn, in_charge_identifier, integer_type_node);
339 1114542 : DECL_CHAIN (parm) = parms;
340 1114542 : parms = parm;
341 1114542 : arg_types = hash_tree_chain (integer_type_node, arg_types);
342 :
343 : /* Insert our new parameter(s) into the list. */
344 1114542 : DECL_CHAIN (DECL_ARGUMENTS (fn)) = parms;
345 :
346 : /* And rebuild the function type. */
347 1114542 : fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
348 : arg_types);
349 1114542 : if (TYPE_ATTRIBUTES (TREE_TYPE (fn)))
350 3 : fntype = (cp_build_type_attribute_variant
351 3 : (fntype, TYPE_ATTRIBUTES (TREE_TYPE (fn))));
352 1114542 : fntype = cxx_copy_lang_qualifiers (fntype, TREE_TYPE (fn));
353 1114542 : TREE_TYPE (fn) = fntype;
354 :
355 : /* Now we've got the in-charge parameter. */
356 1114542 : DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
357 : }
358 :
359 : /* Classes overload their constituent function names automatically.
360 : When a function name is declared in a record structure,
361 : its name is changed to it overloaded name. Since names for
362 : constructors and destructors can conflict, we place a leading
363 : '$' for destructors.
364 :
365 : CNAME is the name of the class we are grokking for.
366 :
367 : FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
368 :
369 : FLAGS contains bits saying what's special about today's
370 : arguments. DTOR_FLAG == DESTRUCTOR.
371 :
372 : If FUNCTION is a destructor, then we must add the `auto-delete' field
373 : as a second parameter. There is some hair associated with the fact
374 : that we must "declare" this variable in the manner consistent with the
375 : way the rest of the arguments were declared.
376 :
377 : QUALS are the qualifiers for the this pointer. */
378 :
379 : void
380 144509099 : grokclassfn (tree ctype, tree function, enum overload_flags flags)
381 : {
382 144509099 : tree fn_name = DECL_NAME (function);
383 :
384 : /* Even within an `extern "C"' block, members get C++ linkage. See
385 : [dcl.link] for details. */
386 144509099 : SET_DECL_LANGUAGE (function, lang_cplusplus);
387 :
388 144509099 : if (fn_name == NULL_TREE)
389 : {
390 0 : error ("name missing for member function");
391 0 : fn_name = get_identifier ("<anonymous>");
392 0 : DECL_NAME (function) = fn_name;
393 : }
394 :
395 144509099 : DECL_CONTEXT (function) = ctype;
396 :
397 144509099 : if (flags == DTOR_FLAG)
398 12085182 : DECL_CXX_DESTRUCTOR_P (function) = 1;
399 :
400 276933016 : if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
401 57048406 : maybe_retrofit_in_chrg (function);
402 144509099 : }
403 :
404 : /* Create an ARRAY_REF, checking for the user doing things backwards
405 : along the way.
406 : If INDEX_EXP is non-NULL, then that is the index expression,
407 : otherwise INDEX_EXP_LIST is the list of index expressions. */
408 :
409 : tree
410 11265995 : grok_array_decl (location_t loc, tree array_expr, tree index_exp,
411 : vec<tree, va_gc> **index_exp_list, tsubst_flags_t complain)
412 : {
413 11265995 : tree type;
414 11265995 : tree expr;
415 11265995 : tree orig_array_expr = array_expr;
416 11265995 : tree orig_index_exp = index_exp;
417 11256768 : vec<tree, va_gc> *orig_index_exp_list
418 11265995 : = index_exp_list ? *index_exp_list : NULL;
419 11265995 : tree overload = NULL_TREE;
420 :
421 11265995 : if (error_operand_p (array_expr) || error_operand_p (index_exp))
422 81 : return error_mark_node;
423 :
424 11265914 : if (processing_template_decl)
425 : {
426 9639133 : if (type_dependent_expression_p (array_expr)
427 9639159 : || (index_exp ? type_dependent_expression_p (index_exp)
428 26 : : any_type_dependent_arguments_p (*index_exp_list)))
429 : {
430 7846862 : if (index_exp == NULL)
431 1647 : index_exp = build_min_nt_call_vec (ovl_op_identifier (ARRAY_REF),
432 : *index_exp_list);
433 7846862 : return build_min_nt_loc (loc, ARRAY_REF, array_expr, index_exp,
434 7846862 : NULL_TREE, NULL_TREE);
435 : }
436 1792271 : if (!index_exp)
437 25 : orig_index_exp_list = make_tree_vector_copy (*index_exp_list);
438 : }
439 :
440 3419052 : type = TREE_TYPE (array_expr);
441 3419052 : gcc_assert (type);
442 3419052 : type = non_reference (type);
443 :
444 : /* If they have an `operator[]', use that. */
445 3419052 : if (MAYBE_CLASS_TYPE_P (type)
446 3095997 : || (index_exp && MAYBE_CLASS_TYPE_P (TREE_TYPE (index_exp)))
447 : || (index_exp == NULL_TREE
448 56 : && !(*index_exp_list)->is_empty ()
449 51 : && MAYBE_CLASS_TYPE_P (TREE_TYPE ((*index_exp_list)->last ()))))
450 : {
451 323098 : if (index_exp)
452 322832 : expr = build_new_op (loc, ARRAY_REF, LOOKUP_NORMAL, array_expr,
453 : index_exp, NULL_TREE, NULL_TREE,
454 : &overload, complain);
455 266 : else if ((*index_exp_list)->is_empty ())
456 97 : expr = build_op_subscript (loc, array_expr, index_exp_list, &overload,
457 : complain);
458 : else
459 : {
460 169 : expr = build_op_subscript (loc, array_expr, index_exp_list,
461 : &overload, complain & tf_decltype);
462 169 : if (expr == error_mark_node
463 : /* Don't do the backward compatibility fallback in a SFINAE
464 : context. */
465 20 : && (complain & tf_error))
466 : {
467 10 : tree idx = build_x_compound_expr_from_vec (*index_exp_list, NULL,
468 : tf_none);
469 10 : if (idx != error_mark_node)
470 10 : expr = build_new_op (loc, ARRAY_REF, LOOKUP_NORMAL, array_expr,
471 : idx, NULL_TREE, NULL_TREE, &overload,
472 : complain & tf_decltype);
473 10 : if (expr == error_mark_node)
474 : {
475 1 : overload = NULL_TREE;
476 1 : expr = build_op_subscript (loc, array_expr, index_exp_list,
477 : &overload, complain);
478 : }
479 : else
480 : {
481 : /* If it would be valid albeit deprecated expression in
482 : C++20, just pedwarn on it and treat it as if wrapped
483 : in (). */
484 9 : pedwarn (loc, OPT_Wcomma_subscript,
485 : "top-level comma expression in array subscript "
486 : "changed meaning in C++23");
487 9 : if (processing_template_decl)
488 : {
489 2 : orig_index_exp
490 2 : = build_x_compound_expr_from_vec (orig_index_exp_list,
491 : NULL, complain);
492 2 : if (orig_index_exp == error_mark_node)
493 0 : expr = error_mark_node;
494 2 : release_tree_vector (orig_index_exp_list);
495 : }
496 : }
497 : }
498 : }
499 : }
500 : else
501 : {
502 3095954 : tree p1, p2, i1, i2;
503 3095954 : bool swapped = false;
504 :
505 : /* Otherwise, create an ARRAY_REF for a pointer or array type.
506 : It is a little-known fact that, if `a' is an array and `i' is
507 : an int, you can write `i[a]', which means the same thing as
508 : `a[i]'. */
509 3095954 : if (TREE_CODE (type) == ARRAY_TYPE || VECTOR_TYPE_P (type))
510 : p1 = array_expr;
511 : else
512 1991220 : p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
513 :
514 3095954 : if (index_exp == NULL_TREE)
515 : {
516 56 : if (!(complain & tf_error))
517 : /* Don't do the backward compatibility fallback in a SFINAE
518 : context. */
519 8 : return error_mark_node;
520 :
521 48 : if ((*index_exp_list)->is_empty ())
522 : {
523 1 : error_at (loc, "built-in subscript operator without expression "
524 : "list");
525 1 : return error_mark_node;
526 : }
527 47 : tree idx = build_x_compound_expr_from_vec (*index_exp_list, NULL,
528 : tf_none);
529 47 : if (idx != error_mark_node)
530 : /* If it would be valid albeit deprecated expression in C++20,
531 : just pedwarn on it and treat it as if wrapped in (). */
532 47 : pedwarn (loc, OPT_Wcomma_subscript,
533 : "top-level comma expression in array subscript "
534 : "changed meaning in C++23");
535 : else
536 : {
537 0 : error_at (loc, "built-in subscript operator with more than one "
538 : "expression in expression list");
539 0 : return error_mark_node;
540 : }
541 47 : index_exp = idx;
542 47 : if (processing_template_decl)
543 : {
544 1 : orig_index_exp
545 1 : = build_x_compound_expr_from_vec (orig_index_exp_list,
546 : NULL, complain);
547 1 : release_tree_vector (orig_index_exp_list);
548 1 : if (orig_index_exp == error_mark_node)
549 : return error_mark_node;
550 : }
551 : }
552 :
553 3095945 : if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
554 : p2 = index_exp;
555 : else
556 3095909 : p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
557 :
558 3095945 : i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
559 : false);
560 3095945 : i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
561 : false);
562 :
563 3095945 : if ((p1 && i2) && (i1 && p2))
564 0 : error ("ambiguous conversion for array subscript");
565 :
566 3095945 : if (p1 && i2)
567 : array_expr = p1, index_exp = i2;
568 80 : else if (i1 && p2)
569 : swapped = true, array_expr = p2, index_exp = i1;
570 : else
571 : {
572 29 : if (complain & tf_error)
573 25 : error_at (loc, "invalid types %<%T[%T]%> for array subscript",
574 25 : type, TREE_TYPE (index_exp));
575 29 : return error_mark_node;
576 : }
577 :
578 3095916 : if (array_expr == error_mark_node || index_exp == error_mark_node)
579 0 : error ("ambiguous conversion for array subscript");
580 :
581 3095916 : if (TYPE_PTR_P (TREE_TYPE (array_expr)))
582 1991172 : array_expr = mark_rvalue_use (array_expr);
583 : else
584 1104744 : array_expr = mark_lvalue_use_nonread (array_expr);
585 3095916 : index_exp = mark_rvalue_use (index_exp);
586 3095916 : if (swapped
587 51 : && flag_strong_eval_order == 2
588 3095960 : && (TREE_SIDE_EFFECTS (array_expr) || TREE_SIDE_EFFECTS (index_exp)))
589 18 : expr = build_array_ref (input_location, index_exp, array_expr);
590 : else
591 3095898 : expr = build_array_ref (input_location, array_expr, index_exp);
592 : }
593 3419014 : if (processing_template_decl && expr != error_mark_node)
594 : {
595 1792271 : if (overload != NULL_TREE)
596 : {
597 262582 : if (orig_index_exp == NULL_TREE)
598 : {
599 22 : expr = build_min_non_dep_op_overload (expr, overload,
600 : orig_array_expr,
601 : orig_index_exp_list);
602 22 : release_tree_vector (orig_index_exp_list);
603 22 : return expr;
604 : }
605 262560 : return build_min_non_dep_op_overload (ARRAY_REF, expr, overload,
606 : orig_array_expr,
607 262560 : orig_index_exp);
608 : }
609 :
610 1529689 : if (orig_index_exp == NULL_TREE)
611 : {
612 0 : orig_index_exp
613 0 : = build_min_nt_call_vec (ovl_op_identifier (ARRAY_REF),
614 : orig_index_exp_list);
615 0 : release_tree_vector (orig_index_exp_list);
616 : }
617 :
618 1529689 : return build_min_non_dep (ARRAY_REF, expr, orig_array_expr,
619 1529689 : orig_index_exp, NULL_TREE, NULL_TREE);
620 : }
621 : return expr;
622 : }
623 :
624 : /* Build an OMP_ARRAY_SECTION expression, handling usage in template
625 : definitions, etc. */
626 :
627 : tree
628 4803 : grok_omp_array_section (location_t loc, tree array_expr, tree index,
629 : tree length)
630 : {
631 4803 : tree orig_array_expr = array_expr;
632 4803 : tree orig_index = index;
633 4803 : tree orig_length = length;
634 :
635 4803 : if (error_operand_p (array_expr)
636 4794 : || error_operand_p (index)
637 9597 : || error_operand_p (length))
638 9 : return error_mark_node;
639 :
640 4794 : if (processing_template_decl
641 4794 : && (type_dependent_expression_p (array_expr)
642 757 : || type_dependent_expression_p (index)
643 741 : || type_dependent_expression_p (length)))
644 930 : return build_min_nt_loc (loc, OMP_ARRAY_SECTION, array_expr, index, length);
645 :
646 3864 : index = fold_non_dependent_expr (index);
647 3864 : length = fold_non_dependent_expr (length);
648 :
649 : /* NOTE: We can pass through invalidly-typed index/length fields
650 : here (e.g. if the user tries to use a floating-point index/length).
651 : This is diagnosed later in semantics.cc:handle_omp_array_sections_1. */
652 :
653 3864 : tree expr = build_omp_array_section (loc, array_expr, index, length);
654 :
655 3864 : if (processing_template_decl)
656 741 : expr = build_min_non_dep (OMP_ARRAY_SECTION, expr, orig_array_expr,
657 : orig_index, orig_length);
658 : return expr;
659 : }
660 :
661 : /* Given the cast expression EXP, checking out its validity. Either return
662 : an error_mark_node if there was an unavoidable error, return a cast to
663 : void for trying to delete a pointer w/ the value 0, or return the
664 : call to delete. If DOING_VEC is true, we handle things differently
665 : for doing an array delete.
666 : Implements ARM $5.3.4. This is called from the parser. */
667 :
668 : tree
669 555298 : delete_sanity (location_t loc, tree exp, tree size, bool doing_vec,
670 : int use_global_delete, tsubst_flags_t complain)
671 : {
672 555298 : tree t, type;
673 :
674 555298 : if (exp == error_mark_node)
675 : return exp;
676 :
677 555181 : if (processing_template_decl)
678 : {
679 431970 : t = build_min (DELETE_EXPR, void_type_node, exp, size);
680 431970 : DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
681 431970 : DELETE_EXPR_USE_VEC (t) = doing_vec;
682 431970 : TREE_SIDE_EFFECTS (t) = 1;
683 431970 : SET_EXPR_LOCATION (t, loc);
684 431970 : return t;
685 : }
686 :
687 123211 : location_t exp_loc = cp_expr_loc_or_loc (exp, loc);
688 :
689 : /* An array can't have been allocated by new, so complain. */
690 123211 : if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE
691 123211 : && (complain & tf_warning))
692 21 : warning_at (exp_loc, 0, "deleting array %q#E", exp);
693 :
694 123211 : t = build_expr_type_conversion (WANT_POINTER, exp, true);
695 :
696 123211 : if (t == NULL_TREE || t == error_mark_node)
697 : {
698 21 : if (complain & tf_error)
699 21 : error_at (exp_loc,
700 : "type %q#T argument given to %<delete%>, expected pointer",
701 21 : TREE_TYPE (exp));
702 21 : return error_mark_node;
703 : }
704 :
705 123190 : type = TREE_TYPE (t);
706 :
707 : /* As of Valley Forge, you can delete a pointer to const. */
708 :
709 : /* You can't delete functions. */
710 123190 : if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
711 : {
712 6 : if (complain & tf_error)
713 6 : error_at (exp_loc,
714 : "cannot delete a function. Only pointer-to-objects are "
715 : "valid arguments to %<delete%>");
716 6 : return error_mark_node;
717 : }
718 :
719 : /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
720 123184 : if (VOID_TYPE_P (TREE_TYPE (type)))
721 : {
722 19 : if (complain & tf_warning)
723 19 : warning_at (exp_loc, OPT_Wdelete_incomplete,
724 : "deleting %qT is undefined", type);
725 : doing_vec = 0;
726 : }
727 :
728 : /* Deleting a pointer with the value zero is valid and has no effect. */
729 123184 : if (integer_zerop (t))
730 3 : return build1_loc (loc, NOP_EXPR, void_type_node, t);
731 :
732 123181 : if (doing_vec)
733 20873 : return build_vec_delete (loc, t, /*maxindex=*/NULL_TREE,
734 : sfk_deleting_destructor,
735 20873 : use_global_delete, complain);
736 : else
737 102308 : return build_delete (loc, type, t, sfk_deleting_destructor,
738 : LOOKUP_NORMAL, use_global_delete,
739 102308 : complain);
740 : }
741 :
742 : /* Report an error if the indicated template declaration is not the
743 : sort of thing that should be a member template. */
744 :
745 : void
746 21630730 : check_member_template (tree tmpl)
747 : {
748 21630730 : tree decl;
749 :
750 21630730 : gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
751 21630730 : decl = DECL_TEMPLATE_RESULT (tmpl);
752 :
753 21630730 : if (TREE_CODE (decl) == FUNCTION_DECL
754 2254992 : || DECL_ALIAS_TEMPLATE_P (tmpl)
755 22678669 : || (TREE_CODE (decl) == TYPE_DECL
756 726060 : && MAYBE_CLASS_TYPE_P (TREE_TYPE (decl))))
757 : {
758 : /* The parser rejects template declarations in local classes
759 : (with the exception of generic lambdas). */
760 21730528 : gcc_assert (!current_function_decl || LAMBDA_FUNCTION_P (decl));
761 : /* The parser rejects any use of virtual in a function template. */
762 21308851 : gcc_assert (!(TREE_CODE (decl) == FUNCTION_DECL
763 : && DECL_VIRTUAL_P (decl)));
764 :
765 : /* The debug-information generating code doesn't know what to do
766 : with member templates. */
767 21308851 : DECL_IGNORED_P (tmpl) = 1;
768 : }
769 321879 : else if (variable_template_p (tmpl))
770 : /* OK */;
771 : else
772 0 : error ("template declaration of %q#D", decl);
773 21630730 : }
774 :
775 : /* A struct for conveniently working with the parameter types of a
776 : fndecl. */
777 :
778 276 : struct fndecl_signature
779 : {
780 184 : fndecl_signature (tree fndecl)
781 184 : : m_fndecl (fndecl),
782 184 : m_num_artificial_parms (num_artificial_parms_for (fndecl)),
783 184 : m_variadic (true)
784 : {
785 184 : function_args_iterator iter;
786 184 : tree argtype;
787 615 : FOREACH_FUNCTION_ARGS (TREE_TYPE (fndecl), argtype, iter)
788 : {
789 : /* A trailing "void" type means that FNDECL is non-variadic. */
790 603 : if (VOID_TYPE_P (argtype))
791 : {
792 172 : gcc_assert (!TREE_CHAIN (iter.next));
793 172 : m_variadic = false;
794 172 : break;
795 : }
796 431 : m_parm_types.safe_push (argtype);
797 : }
798 368 : gcc_assert (m_parm_types.length () >= (size_t)m_num_artificial_parms);
799 184 : m_num_user_parms = m_parm_types.length () - m_num_artificial_parms;
800 184 : }
801 :
802 : /* Convert from index within DECL_ARGUMENTS to 0-based user-written
803 : parameter, or -1 for "this". */
804 : int
805 88 : get_argno_from_idx (size_t idx) const
806 : {
807 88 : return static_cast<int> (idx) - m_num_artificial_parms;
808 : }
809 :
810 : location_t
811 88 : get_argno_location (int argno) const
812 : {
813 88 : return get_fndecl_argument_location (m_fndecl, argno);
814 : }
815 :
816 : tree m_fndecl;
817 : int m_num_artificial_parms;
818 : auto_vec<tree> m_parm_types;
819 : size_t m_num_user_parms;
820 : bool m_variadic;
821 : };
822 :
823 : /* A rich_location subclass that highlights a given argno
824 : within FNDECL_SIG using HIGHLIGHT_COLOR in the quoted source. */
825 :
826 132 : class parm_rich_location : public gcc_rich_location
827 : {
828 : public:
829 88 : parm_rich_location (const fndecl_signature &fndecl_sig,
830 : int argno,
831 : const char *highlight_color)
832 88 : : gcc_rich_location (fndecl_sig.get_argno_location (argno),
833 : nullptr,
834 88 : highlight_color)
835 : {
836 88 : }
837 : };
838 :
839 : /* A class for comparing a pair of fndecls and emitting diagnostic notes
840 : about the differences between them, if they are sufficiently close. */
841 :
842 92 : class fndecl_comparison
843 : {
844 : public:
845 92 : fndecl_comparison (tree decl_a,
846 : tree decl_b)
847 92 : : m_decl_a (decl_a),
848 92 : m_decl_b (decl_b)
849 : {
850 92 : gcc_assert (TREE_CODE (decl_a) == FUNCTION_DECL);
851 92 : gcc_assert (TREE_CODE (decl_b) == FUNCTION_DECL);
852 92 : }
853 :
854 : /* Attempt to emit diagnostic notes describing the differences between
855 : the fndecls, when they are a sufficiently close match. */
856 : void
857 92 : maybe_emit_notes_for_close_match () const
858 : {
859 : /* If there's a difference in "variadicness", don't attempt to emit
860 : any notes. */
861 92 : if (m_decl_a.m_variadic != m_decl_b.m_variadic)
862 12 : return;
863 :
864 80 : auto_vec<parm_difference> differences = get_differences ();
865 124 : if (differences.length () == 1)
866 : {
867 44 : auto_diagnostic_nesting_level sentinel;
868 44 : print_parm_type_difference (differences[0]);
869 44 : }
870 80 : }
871 :
872 : private:
873 : struct parm_difference
874 : {
875 : size_t m_parm_idx_a;
876 : size_t m_parm_idx_b;
877 : };
878 :
879 : /* If we have a close match, return the differences between the two
880 : fndecls. Otherwise return an empty vector. */
881 : auto_vec<parm_difference>
882 80 : get_differences () const
883 : {
884 80 : auto_vec<parm_difference> differences;
885 :
886 : /* For now, just handle the case where the "user parm" count is
887 : equal. */
888 80 : if (m_decl_a.m_num_user_parms != m_decl_b.m_num_user_parms)
889 : return differences;
890 :
891 : /* Ideally we'd check the edit distance, and thus report on close
892 : matches which are missing a param, have transposed params, etc.
893 : For now, just iterate through the params, finding differences
894 : elementwise. */
895 :
896 : /* Find differences in artificial params, if they are comparable.
897 : This should find e.g. const vs non-const differences in "this". */
898 65 : if (m_decl_a.m_num_artificial_parms == m_decl_b.m_num_artificial_parms)
899 62 : for (int parm_idx = 0;
900 124 : parm_idx < m_decl_a.m_num_artificial_parms;
901 : ++parm_idx)
902 62 : compare (parm_idx, parm_idx, differences);
903 :
904 : /* Find differences in user-provided params. */
905 74 : for (size_t user_parm_idx = 0;
906 139 : user_parm_idx < m_decl_a.m_num_user_parms;
907 : ++user_parm_idx)
908 : {
909 74 : const size_t idx_a = m_decl_a.m_num_artificial_parms + user_parm_idx;
910 74 : const size_t idx_b = m_decl_b.m_num_artificial_parms + user_parm_idx;
911 74 : compare (idx_a, idx_b, differences);
912 : }
913 :
914 : return differences;
915 : }
916 :
917 : void
918 136 : compare (size_t idx_a, size_t idx_b,
919 : auto_vec<parm_difference> &differences) const
920 : {
921 136 : if (!same_type_p (m_decl_a.m_parm_types[idx_a],
922 : m_decl_b.m_parm_types[idx_b]))
923 44 : differences.safe_push (parm_difference {idx_a, idx_b});
924 136 : }
925 :
926 : void
927 44 : print_parm_type_difference (const parm_difference &diff) const
928 : {
929 44 : const char * const highlight_a = "highlight-a";
930 44 : pp_markup::element_quoted_type type_of_parm_a
931 44 : (m_decl_a.m_parm_types[diff.m_parm_idx_a],
932 44 : highlight_a);
933 44 : const int argno_a = m_decl_a.get_argno_from_idx (diff.m_parm_idx_a);
934 44 : parm_rich_location rich_loc_a (m_decl_a, argno_a, highlight_a);
935 44 : inform (&rich_loc_a,
936 : "parameter %P of candidate has type %e...",
937 : argno_a, &type_of_parm_a);
938 :
939 44 : const char * const highlight_b = "highlight-b";
940 44 : pp_markup::element_quoted_type type_of_parm_b
941 44 : (m_decl_b.m_parm_types[diff.m_parm_idx_b],
942 44 : highlight_b);
943 44 : const int argno_b = m_decl_b.get_argno_from_idx (diff.m_parm_idx_b);
944 44 : parm_rich_location rich_loc_b (m_decl_b, argno_b, highlight_b);
945 44 : inform (&rich_loc_b,
946 : "...which does not match type %e",
947 : &type_of_parm_b);
948 44 : }
949 :
950 : fndecl_signature m_decl_a;
951 : fndecl_signature m_decl_b;
952 : };
953 :
954 78 : class decl_mismatch_context : public candidate_context
955 : {
956 : public:
957 78 : decl_mismatch_context (tree function)
958 78 : : m_function (function)
959 : {
960 78 : gcc_assert (TREE_CODE (function) == FUNCTION_DECL);
961 78 : }
962 :
963 : void
964 101 : emit_any_notes_for_candidate (tree cand) final override
965 : {
966 101 : if (TREE_CODE (cand) == FUNCTION_DECL)
967 : {
968 92 : fndecl_comparison diff (cand, m_function);
969 92 : diff.maybe_emit_notes_for_close_match ();
970 92 : }
971 101 : }
972 : private:
973 : tree m_function;
974 : };
975 :
976 : /* Sanity check: report error if this function FUNCTION is not
977 : really a member of the class (CTYPE) it is supposed to belong to.
978 : TEMPLATE_PARMS is used to specify the template parameters of a member
979 : template passed as FUNCTION_DECL. If the member template is passed as a
980 : TEMPLATE_DECL, it can be NULL since the parameters can be extracted
981 : from the declaration. If the function is not a function template, it
982 : must be NULL.
983 : It returns the original declaration for the function, NULL_TREE if
984 : no declaration was found, error_mark_node if an error was emitted. */
985 :
986 : tree
987 9080509 : check_classfn (tree ctype, tree function, tree template_parms)
988 : {
989 9080509 : if (DECL_USE_TEMPLATE (function)
990 1172299 : && !(TREE_CODE (function) == TEMPLATE_DECL
991 1012 : && DECL_TEMPLATE_SPECIALIZATION (function))
992 10251796 : && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
993 : /* Since this is a specialization of a member template,
994 : we're not going to find the declaration in the class.
995 : For example, in:
996 :
997 : struct S { template <typename T> void f(T); };
998 : template <> void S::f(int);
999 :
1000 : we're not going to find `S::f(int)', but there's no
1001 : reason we should, either. We let our callers know we didn't
1002 : find the method, but we don't complain. */
1003 : return NULL_TREE;
1004 :
1005 : /* Basic sanity check: for a template function, the template parameters
1006 : either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
1007 8697179 : if (TREE_CODE (function) == TEMPLATE_DECL)
1008 : {
1009 1030 : if (template_parms
1010 2042 : && !comp_template_parms (template_parms,
1011 1012 : DECL_TEMPLATE_PARMS (function)))
1012 : {
1013 0 : error ("template parameter lists provided don%'t match the "
1014 : "template parameters of %qD", function);
1015 0 : return error_mark_node;
1016 : }
1017 1030 : template_parms = DECL_TEMPLATE_PARMS (function);
1018 : }
1019 :
1020 : /* OK, is this a definition of a member template? */
1021 8697179 : bool is_template = (template_parms != NULL_TREE);
1022 :
1023 : /* [temp.mem]
1024 :
1025 : A destructor shall not be a member template. */
1026 17394358 : if (DECL_DESTRUCTOR_P (function) && is_template)
1027 : {
1028 6 : error ("destructor %qD declared as member template", function);
1029 6 : return error_mark_node;
1030 : }
1031 :
1032 : /* We must enter the scope here, because conversion operators are
1033 : named by target type, and type equivalence relies on typenames
1034 : resolving within the scope of CTYPE. */
1035 8697173 : tree pushed_scope = push_scope (ctype);
1036 8697173 : tree matched = NULL_TREE;
1037 8697173 : tree fns = get_class_binding (ctype, DECL_NAME (function));
1038 8697173 : bool saw_template = false;
1039 :
1040 35040070 : for (ovl_iterator iter (fns); !matched && iter; ++iter)
1041 : {
1042 15620351 : tree fndecl = *iter;
1043 :
1044 15620351 : if (TREE_CODE (fndecl) == TEMPLATE_DECL)
1045 3867972 : saw_template = true;
1046 :
1047 : /* A member template definition only matches a member template
1048 : declaration. */
1049 15620351 : if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
1050 1698106 : continue;
1051 :
1052 13922245 : if (!DECL_DECLARES_FUNCTION_P (fndecl))
1053 291994 : continue;
1054 :
1055 13630251 : tree p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
1056 13630251 : tree p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
1057 :
1058 : /* We cannot simply call decls_match because this doesn't work
1059 : for static member functions that are pretending to be
1060 : methods, and because the name may have been changed by
1061 : asm("new_name"). */
1062 :
1063 : /* Get rid of the this parameter on functions that become
1064 : static. */
1065 13630251 : if (DECL_STATIC_FUNCTION_P (fndecl)
1066 13630251 : && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
1067 168109 : p1 = TREE_CHAIN (p1);
1068 :
1069 : /* ref-qualifier or absence of same must match. */
1070 27260502 : if (type_memfn_rqual (TREE_TYPE (function))
1071 13630251 : != type_memfn_rqual (TREE_TYPE (fndecl)))
1072 86 : continue;
1073 :
1074 : // Include constraints in the match.
1075 13630165 : tree c1 = get_constraints (function);
1076 13630165 : tree c2 = get_constraints (fndecl);
1077 :
1078 : /* While finding a match, same types and params are not enough
1079 : if the function is versioned. Also check for different target
1080 : specific attributes. */
1081 13630165 : if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
1082 : TREE_TYPE (TREE_TYPE (fndecl)))
1083 12897388 : && compparms (p1, p2)
1084 8697101 : && !disjoint_version_decls (function, fndecl)
1085 8697101 : && (!is_template
1086 2119472 : || comp_template_parms (template_parms,
1087 2119472 : DECL_TEMPLATE_PARMS (fndecl)))
1088 8697095 : && equivalent_constraints (c1, c2)
1089 8697044 : && (DECL_TEMPLATE_SPECIALIZATION (function)
1090 8697044 : == DECL_TEMPLATE_SPECIALIZATION (fndecl))
1091 22327209 : && (!DECL_TEMPLATE_SPECIALIZATION (function)
1092 767931 : || (DECL_TI_TEMPLATE (function) == DECL_TI_TEMPLATE (fndecl))))
1093 : matched = fndecl;
1094 : }
1095 :
1096 114 : if (!matched && !is_template && saw_template
1097 8697188 : && !processing_template_decl && DECL_UNIQUE_FRIEND_P (function))
1098 : {
1099 : /* "[if no non-template match is found,] each remaining function template
1100 : is replaced with the specialization chosen by deduction from the
1101 : friend declaration or discarded if deduction fails."
1102 :
1103 : So tell check_explicit_specialization to look for a match. */
1104 3 : SET_DECL_IMPLICIT_INSTANTIATION (function);
1105 3 : DECL_TEMPLATE_INFO (function) = build_template_info (fns, NULL_TREE);
1106 3 : matched = function;
1107 : }
1108 :
1109 8697173 : if (!matched)
1110 : {
1111 126 : if (!COMPLETE_TYPE_P (ctype))
1112 6 : cxx_incomplete_type_error (DECL_SOURCE_LOCATION (function),
1113 : function, ctype);
1114 : else
1115 : {
1116 120 : if (DECL_CONV_FN_P (function))
1117 6 : fns = get_class_binding (ctype, conv_op_identifier);
1118 :
1119 120 : auto_diagnostic_group d;
1120 120 : error_at (DECL_SOURCE_LOCATION (function),
1121 : "no declaration matches %q#D", function);
1122 120 : if (fns)
1123 : {
1124 78 : decl_mismatch_context ctxt (function);
1125 78 : print_candidates (DECL_SOURCE_LOCATION (function), fns, &ctxt);
1126 78 : }
1127 42 : else if (DECL_CONV_FN_P (function))
1128 3 : inform (DECL_SOURCE_LOCATION (function),
1129 : "no conversion operators declared");
1130 : else
1131 39 : inform (DECL_SOURCE_LOCATION (function),
1132 : "no functions named %qD", function);
1133 120 : inform (DECL_SOURCE_LOCATION (TYPE_NAME (ctype)),
1134 : "%#qT defined here", ctype);
1135 120 : }
1136 126 : matched = error_mark_node;
1137 : }
1138 :
1139 8697173 : if (pushed_scope)
1140 8350824 : pop_scope (pushed_scope);
1141 :
1142 : return matched;
1143 : }
1144 :
1145 : /* DECL is a function with vague linkage. Remember it so that at the
1146 : end of the translation unit we can decide whether or not to emit
1147 : it. */
1148 :
1149 : void
1150 53555150 : note_vague_linkage_fn (tree decl)
1151 : {
1152 53555150 : if (processing_template_decl)
1153 : return;
1154 :
1155 53555141 : DECL_DEFER_OUTPUT (decl) = 1;
1156 53555141 : vec_safe_push (deferred_fns, decl);
1157 : }
1158 :
1159 : /* As above, but for variables. */
1160 :
1161 : void
1162 16662664 : note_vague_linkage_variable (tree decl)
1163 : {
1164 16662664 : vec_safe_push (pending_statics, decl);
1165 16662664 : }
1166 :
1167 : /* We have just processed the DECL, which is a static data member.
1168 : The other parameters are as for cp_finish_decl. */
1169 :
1170 : void
1171 16379359 : finish_static_data_member_decl (tree decl,
1172 : tree init, bool init_const_expr_p,
1173 : tree asmspec_tree,
1174 : int flags)
1175 : {
1176 16379359 : if (DECL_TEMPLATE_INSTANTIATED (decl))
1177 : /* We already needed to instantiate this, so the processing in this
1178 : function is unnecessary/wrong. */
1179 : return;
1180 :
1181 16379356 : DECL_CONTEXT (decl) = current_class_type;
1182 :
1183 : /* We cannot call pushdecl here, because that would fill in the
1184 : TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
1185 : the right thing, namely, to put this decl out straight away. */
1186 :
1187 16379356 : if (! processing_template_decl)
1188 13560442 : vec_safe_push (pending_statics, decl);
1189 :
1190 16379356 : if (LOCAL_CLASS_P (current_class_type)
1191 : /* We already complained about the template definition. */
1192 16379356 : && !DECL_TEMPLATE_INSTANTIATION (decl))
1193 15 : permerror (DECL_SOURCE_LOCATION (decl),
1194 : "local class %q#T shall not have static data member %q#D",
1195 : current_class_type, decl);
1196 : else
1197 33128183 : for (tree t = current_class_type; TYPE_P (t);
1198 16722392 : t = CP_TYPE_CONTEXT (t))
1199 33444856 : if (TYPE_UNNAMED_P (t))
1200 : {
1201 24 : auto_diagnostic_group d;
1202 24 : if (permerror (DECL_SOURCE_LOCATION (decl),
1203 : "static data member %qD in unnamed class", decl))
1204 24 : inform (DECL_SOURCE_LOCATION (TYPE_NAME (t)),
1205 : "unnamed class defined here");
1206 24 : break;
1207 24 : }
1208 :
1209 16379356 : if (DECL_INLINE_VAR_P (decl) && !DECL_TEMPLATE_INSTANTIATION (decl))
1210 : /* An inline variable is immediately defined, so don't set DECL_IN_AGGR_P.
1211 : Except that if decl is a template instantiation, it isn't defined until
1212 : instantiate_decl. */;
1213 : else
1214 5636593 : DECL_IN_AGGR_P (decl) = 1;
1215 :
1216 16379356 : if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
1217 16379356 : && TYPE_DOMAIN (TREE_TYPE (decl)) == NULL_TREE)
1218 105700 : SET_VAR_HAD_UNKNOWN_BOUND (decl);
1219 :
1220 16379356 : if (init)
1221 : {
1222 : /* Similarly to start_decl_1, we want to complete the type in order
1223 : to do the right thing in cp_apply_type_quals_to_decl, possibly
1224 : clear TYPE_QUAL_CONST (c++/65579). */
1225 11840102 : tree type = TREE_TYPE (decl) = complete_type (TREE_TYPE (decl));
1226 11840102 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
1227 : }
1228 :
1229 16379356 : cp_finish_decl (decl, init, init_const_expr_p, asmspec_tree, flags);
1230 16379356 : check_module_decl_linkage (decl);
1231 : }
1232 :
1233 : /* DECLARATOR and DECLSPECS correspond to a class member. The other
1234 : parameters are as for cp_finish_decl. Return the DECL for the
1235 : class member declared. */
1236 :
1237 : tree
1238 69871427 : grokfield (const cp_declarator *declarator,
1239 : cp_decl_specifier_seq *declspecs,
1240 : tree init, bool init_const_expr_p,
1241 : tree asmspec_tree,
1242 : tree attrlist)
1243 : {
1244 69871427 : tree value;
1245 69871427 : const char *asmspec = 0;
1246 69871427 : int flags;
1247 :
1248 69871427 : if (init
1249 12635921 : && TREE_CODE (init) == TREE_LIST
1250 0 : && TREE_VALUE (init) == error_mark_node
1251 69871427 : && TREE_CHAIN (init) == NULL_TREE)
1252 : init = NULL_TREE;
1253 :
1254 69871427 : int initialized;
1255 69871427 : if (init == ridpointers[(int)RID_DELETE]
1256 69871427 : || (init
1257 9103661 : && TREE_CODE (init) == STRING_CST
1258 178 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
1259 : initialized = SD_DELETED;
1260 66338989 : else if (init == ridpointers[(int)RID_DEFAULT])
1261 : initialized = SD_DEFAULTED;
1262 59775597 : else if (init)
1263 : initialized = SD_INITIALIZED;
1264 : else
1265 57235506 : initialized = SD_UNINITIALIZED;
1266 :
1267 69871427 : value = grokdeclarator (declarator, declspecs, FIELD, initialized, &attrlist);
1268 69871421 : if (! value || value == error_mark_node)
1269 : /* friend or constructor went bad. */
1270 340 : return error_mark_node;
1271 69871081 : if (TREE_TYPE (value) == error_mark_node)
1272 : return value;
1273 :
1274 69870922 : if (TREE_CODE (value) == TYPE_DECL && init)
1275 : {
1276 6 : error_at (cp_expr_loc_or_loc (init, DECL_SOURCE_LOCATION (value)),
1277 : "typedef %qD is initialized (use %qs instead)",
1278 : value, "decltype");
1279 6 : init = NULL_TREE;
1280 : }
1281 :
1282 : /* Pass friendly classes back. */
1283 69870922 : if (value == void_type_node)
1284 : return value;
1285 :
1286 69870922 : if (DECL_NAME (value)
1287 69870922 : && TREE_CODE (DECL_NAME (value)) == TEMPLATE_ID_EXPR)
1288 : {
1289 3 : error_at (declarator->id_loc,
1290 : "explicit template argument list not allowed");
1291 3 : return error_mark_node;
1292 : }
1293 :
1294 : /* Stash away type declarations. */
1295 69870919 : if (TREE_CODE (value) == TYPE_DECL)
1296 : {
1297 24485334 : DECL_NONLOCAL (value) = 1;
1298 24485334 : DECL_CONTEXT (value) = current_class_type;
1299 :
1300 24485334 : if (attrlist)
1301 : {
1302 22938 : int attrflags = 0;
1303 :
1304 : /* If this is a typedef that names the class for linkage purposes
1305 : (7.1.3p8), apply any attributes directly to the type. */
1306 22938 : if (TYPE_DECL_FOR_LINKAGE_PURPOSES_P (value))
1307 12 : attrflags = ATTR_FLAG_TYPE_IN_PLACE;
1308 :
1309 22938 : cplus_decl_attributes (&value, attrlist, attrflags);
1310 : }
1311 :
1312 24485334 : if (decl_spec_seq_has_spec_p (declspecs, ds_typedef)
1313 24485334 : && TREE_TYPE (value) != error_mark_node
1314 48970668 : && TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (value))) != value)
1315 24484697 : set_underlying_type (value);
1316 :
1317 : /* It's important that push_template_decl below follows
1318 : set_underlying_type above so that the created template
1319 : carries the properly set type of VALUE. */
1320 24485334 : if (processing_template_decl)
1321 20243637 : value = push_template_decl (value);
1322 :
1323 24485334 : record_locally_defined_typedef (value);
1324 24485334 : return value;
1325 : }
1326 :
1327 45385585 : int friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
1328 :
1329 45385585 : if (!friendp && DECL_IN_AGGR_P (value))
1330 : {
1331 0 : error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
1332 0 : return void_type_node;
1333 : }
1334 :
1335 45385585 : if (asmspec_tree && asmspec_tree != error_mark_node)
1336 194 : asmspec = TREE_STRING_POINTER (asmspec_tree);
1337 :
1338 45385585 : if (init)
1339 : {
1340 12635858 : if (TREE_CODE (value) == FUNCTION_DECL)
1341 : {
1342 10455639 : if (init == ridpointers[(int)RID_DELETE]
1343 10455639 : || (TREE_CODE (init) == STRING_CST
1344 178 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
1345 : {
1346 3532432 : DECL_DELETED_FN (value) = 1;
1347 3532432 : DECL_DECLARED_INLINE_P (value) = 1;
1348 3532432 : if (TREE_CODE (init) == STRING_CST)
1349 178 : DECL_INITIAL (value) = init;
1350 : }
1351 6923207 : else if (init == ridpointers[(int)RID_DEFAULT])
1352 : {
1353 6563389 : if (defaultable_fn_check (value))
1354 : {
1355 6563310 : DECL_DEFAULTED_FN (value) = 1;
1356 6563310 : DECL_INITIALIZED_IN_CLASS_P (value) = 1;
1357 6563310 : DECL_DECLARED_INLINE_P (value) = 1;
1358 : /* grokfndecl set this to error_mark_node, but we want to
1359 : leave it unset until synthesize_method. */
1360 6563310 : DECL_INITIAL (value) = NULL_TREE;
1361 : }
1362 : }
1363 359818 : else if (TREE_CODE (init) == DEFERRED_PARSE)
1364 0 : error ("invalid initializer for member function %qD", value);
1365 359818 : else if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
1366 : {
1367 359809 : if (integer_zerop (init))
1368 359770 : DECL_PURE_VIRTUAL_P (value) = 1;
1369 39 : else if (error_operand_p (init))
1370 : ; /* An error has already been reported. */
1371 : else
1372 0 : error ("invalid initializer for member function %qD",
1373 : value);
1374 : }
1375 : else
1376 : {
1377 9 : gcc_assert (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE);
1378 9 : location_t iloc
1379 9 : = cp_expr_loc_or_loc (init, DECL_SOURCE_LOCATION (value));
1380 9 : if (friendp)
1381 3 : error_at (iloc, "initializer specified for friend "
1382 : "function %qD", value);
1383 : else
1384 6 : error_at (iloc, "initializer specified for static "
1385 : "member function %qD", value);
1386 : }
1387 : }
1388 2180219 : else if (TREE_CODE (value) == FIELD_DECL)
1389 : /* C++11 NSDMI, keep going. */;
1390 0 : else if (!VAR_P (value))
1391 0 : gcc_unreachable ();
1392 : }
1393 :
1394 : /* Pass friend decls back. */
1395 45385585 : if ((TREE_CODE (value) == FUNCTION_DECL
1396 19402815 : || TREE_CODE (value) == TEMPLATE_DECL)
1397 45385642 : && DECL_CONTEXT (value) != current_class_type)
1398 : {
1399 1973316 : if (attrlist)
1400 0 : cplus_decl_attributes (&value, attrlist, 0);
1401 1973316 : return value;
1402 : }
1403 :
1404 : /* Need to set this before push_template_decl. */
1405 43412269 : if (VAR_P (value))
1406 674420 : DECL_CONTEXT (value) = current_class_type;
1407 :
1408 43412269 : if (processing_template_decl && VAR_OR_FUNCTION_DECL_P (value))
1409 : {
1410 15088413 : value = push_template_decl (value);
1411 15088413 : if (error_operand_p (value))
1412 7 : return error_mark_node;
1413 : }
1414 :
1415 43412262 : if (attrlist)
1416 808684 : cplus_decl_attributes (&value, attrlist, 0);
1417 :
1418 43412262 : if (init && DIRECT_LIST_INIT_P (init))
1419 : flags = LOOKUP_NORMAL;
1420 : else
1421 : flags = LOOKUP_IMPLICIT;
1422 :
1423 43412262 : switch (TREE_CODE (value))
1424 : {
1425 674416 : case VAR_DECL:
1426 674416 : finish_static_data_member_decl (value, init, init_const_expr_p,
1427 : asmspec_tree, flags);
1428 674416 : return value;
1429 :
1430 18728338 : case FIELD_DECL:
1431 18728338 : if (asmspec)
1432 6 : error ("%<asm%> specifiers are not permitted on non-static data members");
1433 18728338 : if (DECL_INITIAL (value) == error_mark_node)
1434 0 : init = error_mark_node;
1435 18728338 : cp_finish_decl (value, init, /*init_const_expr_p=*/false,
1436 : NULL_TREE, flags);
1437 18728338 : DECL_IN_AGGR_P (value) = 1;
1438 18728338 : return value;
1439 :
1440 24009508 : case FUNCTION_DECL:
1441 24009508 : if (asmspec)
1442 92 : set_user_assembler_name (value, asmspec);
1443 :
1444 24009508 : cp_finish_decl (value,
1445 : /*init=*/NULL_TREE,
1446 : /*init_const_expr_p=*/false,
1447 : asmspec_tree, flags);
1448 :
1449 : /* Pass friends back this way. */
1450 24009508 : if (DECL_UNIQUE_FRIEND_P (value))
1451 0 : return void_type_node;
1452 :
1453 24009508 : DECL_IN_AGGR_P (value) = 1;
1454 24009508 : return value;
1455 :
1456 0 : default:
1457 0 : gcc_unreachable ();
1458 : }
1459 : return NULL_TREE;
1460 : }
1461 :
1462 : /* Like grokfield, but just for the initial grok of an initialized static
1463 : member. Used to be able to push the new decl before parsing the
1464 : initialiser. */
1465 :
1466 : tree
1467 11840109 : start_initialized_static_member (const cp_declarator *declarator,
1468 : cp_decl_specifier_seq *declspecs,
1469 : tree attrlist)
1470 : {
1471 11840109 : tree value = grokdeclarator (declarator, declspecs, FIELD, SD_INITIALIZED,
1472 11840109 : &attrlist);
1473 11840109 : if (!value || error_operand_p (value))
1474 3 : return error_mark_node;
1475 11840106 : if (TREE_CODE (value) == TYPE_DECL)
1476 : {
1477 0 : error_at (declarator->init_loc,
1478 : "typedef %qD is initialized (use %qs instead)",
1479 : value, "decltype");
1480 0 : return error_mark_node;
1481 : }
1482 11840106 : else if (TREE_CODE (value) == FUNCTION_DECL)
1483 : {
1484 0 : if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
1485 0 : error_at (declarator->init_loc,
1486 : "invalid initializer for member function %qD",
1487 : value);
1488 0 : else if (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE)
1489 0 : error_at (declarator->init_loc,
1490 : "initializer specified for static member function %qD",
1491 : value);
1492 : else
1493 0 : gcc_unreachable ();
1494 0 : return error_mark_node;
1495 : }
1496 11840106 : else if (TREE_CODE (value) == FIELD_DECL)
1497 : {
1498 : /* NSDM marked 'static', grokdeclarator has already errored. */
1499 3 : gcc_checking_assert (seen_error ());
1500 3 : return error_mark_node;
1501 : }
1502 11840103 : gcc_checking_assert (VAR_P (value));
1503 :
1504 11840103 : DECL_CONTEXT (value) = current_class_type;
1505 11840103 : DECL_INITIALIZED_IN_CLASS_P (value) = true;
1506 :
1507 11840103 : if (processing_template_decl)
1508 : {
1509 2662932 : value = push_template_decl (value);
1510 2662932 : if (error_operand_p (value))
1511 0 : return error_mark_node;
1512 : }
1513 :
1514 11840103 : if (attrlist)
1515 7 : cplus_decl_attributes (&value, attrlist, 0);
1516 :
1517 : /* When defining a template we need to register the TEMPLATE_DECL. */
1518 11840103 : tree maybe_template = value;
1519 11840103 : if (template_parm_scope_p ())
1520 : {
1521 362809 : if (!DECL_TEMPLATE_SPECIALIZATION (value))
1522 321776 : maybe_template = DECL_TI_TEMPLATE (value);
1523 : else
1524 : maybe_template = NULL_TREE;
1525 : }
1526 11799070 : if (maybe_template)
1527 11799070 : finish_member_declaration (maybe_template);
1528 :
1529 11840103 : return value;
1530 : }
1531 :
1532 : /* Whether DECL is a static data member initialized at the point
1533 : of declaration within its class. */
1534 :
1535 : bool
1536 34068232 : is_static_data_member_initialized_in_class (tree decl)
1537 : {
1538 34068232 : if (!decl || decl == error_mark_node)
1539 : return false;
1540 :
1541 34067470 : tree inner = STRIP_TEMPLATE (decl);
1542 20447799 : return (inner
1543 34067470 : && VAR_P (inner)
1544 12314765 : && DECL_CLASS_SCOPE_P (inner)
1545 32758442 : && DECL_INITIALIZED_IN_CLASS_P (inner));
1546 : }
1547 :
1548 : /* Finish a declaration prepared with start_initialized_static_member. */
1549 :
1550 : void
1551 11840106 : finish_initialized_static_member (tree decl, tree init, tree asmspec)
1552 : {
1553 11840106 : if (decl == error_mark_node)
1554 : return;
1555 11840100 : gcc_checking_assert (is_static_data_member_initialized_in_class (decl));
1556 :
1557 11840100 : int flags;
1558 11840100 : if (init && DIRECT_LIST_INIT_P (init))
1559 : flags = LOOKUP_NORMAL;
1560 : else
1561 : flags = LOOKUP_IMPLICIT;
1562 11840100 : finish_static_data_member_decl (decl, init, /*init_const_expr_p=*/true,
1563 : asmspec, flags);
1564 : }
1565 :
1566 : /* Like `grokfield', but for bitfields.
1567 : WIDTH is the width of the bitfield, a constant expression.
1568 : The other parameters are as for grokfield. */
1569 :
1570 : tree
1571 590268 : grokbitfield (const cp_declarator *declarator,
1572 : cp_decl_specifier_seq *declspecs, tree width, tree init,
1573 : tree attrlist)
1574 : {
1575 590268 : tree value = grokdeclarator (declarator, declspecs, BITFIELD,
1576 590268 : init != NULL_TREE, &attrlist);
1577 :
1578 590268 : if (value == error_mark_node)
1579 : return NULL_TREE; /* friends went bad. */
1580 :
1581 590262 : tree type = TREE_TYPE (value);
1582 590262 : if (type == error_mark_node)
1583 : return value;
1584 :
1585 : /* Pass friendly classes back. */
1586 590215 : if (VOID_TYPE_P (value))
1587 0 : return void_type_node;
1588 :
1589 590215 : if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type)
1590 590215 : && (INDIRECT_TYPE_P (type) || !dependent_type_p (type)))
1591 : {
1592 33 : error_at (DECL_SOURCE_LOCATION (value),
1593 : "bit-field %qD with non-integral type %qT",
1594 : value, type);
1595 33 : return error_mark_node;
1596 : }
1597 :
1598 590182 : if (TREE_CODE (value) == TYPE_DECL)
1599 : {
1600 6 : error_at (DECL_SOURCE_LOCATION (value),
1601 : "cannot declare %qD to be a bit-field type", value);
1602 6 : return NULL_TREE;
1603 : }
1604 :
1605 : /* Usually, finish_struct_1 catches bitfields with invalid types.
1606 : But, in the case of bitfields with function type, we confuse
1607 : ourselves into thinking they are member functions, so we must
1608 : check here. */
1609 590176 : if (TREE_CODE (value) == FUNCTION_DECL)
1610 : {
1611 3 : error_at (DECL_SOURCE_LOCATION (value),
1612 : "cannot declare bit-field %qD with function type", value);
1613 3 : return NULL_TREE;
1614 : }
1615 :
1616 590173 : if (TYPE_WARN_IF_NOT_ALIGN (type))
1617 : {
1618 9 : error_at (DECL_SOURCE_LOCATION (value), "cannot declare bit-field "
1619 : "%qD with %<warn_if_not_aligned%> type", value);
1620 9 : return NULL_TREE;
1621 : }
1622 :
1623 590164 : if (DECL_IN_AGGR_P (value))
1624 : {
1625 0 : error ("%qD is already defined in the class %qT", value,
1626 0 : DECL_CONTEXT (value));
1627 0 : return void_type_node;
1628 : }
1629 :
1630 590164 : if (TREE_STATIC (value))
1631 : {
1632 6 : error_at (DECL_SOURCE_LOCATION (value),
1633 : "static member %qD cannot be a bit-field", value);
1634 6 : return NULL_TREE;
1635 : }
1636 :
1637 590158 : int flags = LOOKUP_IMPLICIT;
1638 590158 : if (init && DIRECT_LIST_INIT_P (init))
1639 : flags = LOOKUP_NORMAL;
1640 590158 : cp_finish_decl (value, init, false, NULL_TREE, flags);
1641 :
1642 590158 : if (width != error_mark_node)
1643 : {
1644 : /* The width must be an integer type. */
1645 590141 : if (!type_dependent_expression_p (width)
1646 590141 : && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (width)))
1647 12 : error ("width of bit-field %qD has non-integral type %qT", value,
1648 12 : TREE_TYPE (width));
1649 590129 : else if (!check_for_bare_parameter_packs (width))
1650 : {
1651 : /* Temporarily stash the width in DECL_BIT_FIELD_REPRESENTATIVE.
1652 : check_bitfield_decl picks it from there later and sets DECL_SIZE
1653 : accordingly. */
1654 590123 : DECL_BIT_FIELD_REPRESENTATIVE (value) = width;
1655 590123 : SET_DECL_C_BIT_FIELD (value);
1656 : }
1657 : }
1658 :
1659 590158 : DECL_IN_AGGR_P (value) = 1;
1660 :
1661 590158 : if (attrlist)
1662 1203 : cplus_decl_attributes (&value, attrlist, /*flags=*/0);
1663 :
1664 590158 : return value;
1665 : }
1666 :
1667 :
1668 : /* Returns true iff ATTR is an attribute which needs to be applied at
1669 : instantiation time rather than template definition time. */
1670 :
1671 : static bool
1672 16272067 : is_late_template_attribute (tree attr, tree decl)
1673 : {
1674 16272067 : tree name = get_attribute_name (attr);
1675 16272067 : tree args = TREE_VALUE (attr);
1676 16272067 : const struct attribute_spec *spec
1677 16272067 : = lookup_attribute_spec (TREE_PURPOSE (attr));
1678 16272067 : tree arg;
1679 :
1680 : /* Handle all annotations as late, so that they aren't incorrectly
1681 : reordered if some have dependent expressions and others don't. */
1682 16272067 : if (annotation_p (attr))
1683 : return true;
1684 :
1685 16272040 : if (!spec)
1686 : /* Unknown attribute. */
1687 : return false;
1688 :
1689 : /* Attribute weak handling wants to write out assembly right away. */
1690 16272006 : if (is_attribute_p ("weak", name))
1691 : return true;
1692 :
1693 : /* Attributes used and unused or std attribute maybe_unused are applied
1694 : directly to typedefs for the benefit of
1695 : maybe_warn_unused_local_typedefs. */
1696 16272003 : if (TREE_CODE (decl) == TYPE_DECL
1697 16272003 : && (is_attribute_p ("unused", name)
1698 16055 : || is_attribute_p ("used", name)
1699 16049 : || (is_attribute_p ("maybe_unused", name)
1700 10 : && get_attribute_namespace (attr) == NULL_TREE)))
1701 242 : return false;
1702 :
1703 : /* Attribute tls_model wants to modify the symtab. */
1704 16271761 : if (is_attribute_p ("tls_model", name))
1705 : return true;
1706 :
1707 : /* #pragma omp declare simd attribute needs to be always deferred. */
1708 16271758 : if (flag_openmp
1709 16271758 : && is_attribute_p ("omp declare simd", name))
1710 : return true;
1711 :
1712 16270866 : if (args == error_mark_node)
1713 : return false;
1714 :
1715 : /* An attribute pack is clearly dependent. */
1716 16270866 : if (args && PACK_EXPANSION_P (args))
1717 : return true;
1718 :
1719 : /* If any of the arguments are dependent expressions, we can't evaluate
1720 : the attribute until instantiation time. */
1721 17144207 : for (arg = args; arg; arg = TREE_CHAIN (arg))
1722 : {
1723 1000202 : tree t = TREE_VALUE (arg);
1724 :
1725 : /* If the first attribute argument is an identifier, only consider
1726 : second and following arguments. Attributes like mode, format,
1727 : cleanup and several target specific attributes aren't late
1728 : just because they have an IDENTIFIER_NODE as first argument. */
1729 1036939 : if (arg == args
1730 960523 : && get_attribute_namespace (attr) == gnu_identifier
1731 805671 : && attribute_takes_identifier_p (name)
1732 1000202 : && identifier_p (t))
1733 36737 : continue;
1734 :
1735 963465 : if (value_dependent_expression_p (t))
1736 : return true;
1737 : }
1738 :
1739 16144005 : if (TREE_CODE (decl) == TYPE_DECL
1740 16128976 : || TYPE_P (decl)
1741 15774964 : || spec->type_required)
1742 : {
1743 769239 : tree type = TYPE_P (decl) ? decl : TREE_TYPE (decl);
1744 :
1745 415227 : if (!type)
1746 : return true;
1747 :
1748 : /* We can't apply any attributes to a completely unknown type until
1749 : instantiation time. */
1750 769236 : enum tree_code code = TREE_CODE (type);
1751 769236 : if (code == TEMPLATE_TYPE_PARM
1752 769236 : || code == BOUND_TEMPLATE_TEMPLATE_PARM
1753 768828 : || code == TYPENAME_TYPE)
1754 : return true;
1755 : /* Also defer most attributes on dependent types. This is not
1756 : necessary in all cases, but is the better default. */
1757 764668 : else if (dependent_type_p (type)
1758 : /* But some attributes specifically apply to templates. */
1759 693212 : && !is_attribute_p ("abi_tag", name)
1760 693188 : && !is_attribute_p ("deprecated", name)
1761 363435 : && !is_attribute_p ("unavailable", name)
1762 1128097 : && !is_attribute_p ("visibility", name))
1763 : return true;
1764 : else
1765 : return false;
1766 : }
1767 : else
1768 : return false;
1769 : }
1770 :
1771 : /* ATTR_P is a list of attributes. Remove any attributes which need to be
1772 : applied at instantiation time and return them. If IS_DEPENDENT is true,
1773 : the declaration itself is dependent, so all attributes should be applied
1774 : at instantiation time. */
1775 :
1776 : tree
1777 230644129 : splice_template_attributes (tree *attr_p, tree decl)
1778 : {
1779 230644129 : tree *p = attr_p;
1780 230644129 : tree late_attrs = NULL_TREE;
1781 230644129 : tree *q = &late_attrs;
1782 :
1783 230644129 : if (!p || *p == error_mark_node)
1784 : return NULL_TREE;
1785 :
1786 246916196 : for (; *p; )
1787 : {
1788 16272067 : if (is_late_template_attribute (*p, decl))
1789 : {
1790 495774 : ATTR_IS_DEPENDENT (*p) = 1;
1791 495774 : *q = *p;
1792 495774 : *p = TREE_CHAIN (*p);
1793 495774 : q = &TREE_CHAIN (*q);
1794 495774 : *q = NULL_TREE;
1795 : }
1796 : else
1797 15776293 : p = &TREE_CHAIN (*p);
1798 : }
1799 :
1800 230644129 : return late_attrs;
1801 : }
1802 :
1803 : /* Attach any LATE_ATTRS to DECL_P, after the non-dependent attributes have
1804 : been applied by a previous call to decl_attributes. */
1805 :
1806 : static void
1807 493859 : save_template_attributes (tree late_attrs, tree *decl_p, int flags)
1808 : {
1809 493859 : tree *q;
1810 :
1811 493859 : if (!late_attrs)
1812 : return;
1813 :
1814 493859 : if (DECL_P (*decl_p))
1815 482176 : q = &DECL_ATTRIBUTES (*decl_p);
1816 : else
1817 11683 : q = &TYPE_ATTRIBUTES (*decl_p);
1818 :
1819 493859 : tree old_attrs = *q;
1820 :
1821 : /* Place the late attributes at the beginning of the attribute
1822 : list. */
1823 493859 : late_attrs = chainon (late_attrs, *q);
1824 493859 : if (*q != late_attrs
1825 493859 : && !DECL_P (*decl_p)
1826 11683 : && !(flags & ATTR_FLAG_TYPE_IN_PLACE))
1827 : {
1828 52 : if (!dependent_type_p (*decl_p))
1829 12 : *decl_p = cp_build_type_attribute_variant (*decl_p, late_attrs);
1830 : else
1831 : {
1832 40 : *decl_p = build_variant_type_copy (*decl_p);
1833 40 : TYPE_ATTRIBUTES (*decl_p) = late_attrs;
1834 : }
1835 : }
1836 : else
1837 493807 : *q = late_attrs;
1838 :
1839 493859 : if (!DECL_P (*decl_p) && *decl_p == TYPE_MAIN_VARIANT (*decl_p))
1840 : {
1841 : /* We've added new attributes directly to the main variant, so
1842 : now we need to update all of the other variants to include
1843 : these new attributes. */
1844 11643 : tree variant;
1845 11783 : for (variant = TYPE_NEXT_VARIANT (*decl_p); variant;
1846 140 : variant = TYPE_NEXT_VARIANT (variant))
1847 : {
1848 140 : gcc_assert (TYPE_ATTRIBUTES (variant) == old_attrs);
1849 140 : TYPE_ATTRIBUTES (variant) = TYPE_ATTRIBUTES (*decl_p);
1850 : }
1851 : }
1852 : }
1853 :
1854 : /* True if ATTRS contains any dependent attributes that affect type
1855 : identity. */
1856 :
1857 : bool
1858 2011353620 : any_dependent_type_attributes_p (tree attrs)
1859 : {
1860 2042888366 : for (tree a = attrs; a; a = TREE_CHAIN (a))
1861 31535503 : if (ATTR_IS_DEPENDENT (a))
1862 : {
1863 1948500 : const attribute_spec *as = lookup_attribute_spec (TREE_PURPOSE (a));
1864 1948500 : if (as && as->affects_type_identity)
1865 : return true;
1866 : }
1867 : return false;
1868 : }
1869 :
1870 : /* Return true iff ATTRS are acceptable attributes to be applied in-place
1871 : to a typedef which gives a previously unnamed class or enum a name for
1872 : linkage purposes. */
1873 :
1874 : bool
1875 380676 : attributes_naming_typedef_ok (tree attrs)
1876 : {
1877 391981 : for (; attrs; attrs = TREE_CHAIN (attrs))
1878 : {
1879 11308 : tree name = get_attribute_name (attrs);
1880 11308 : if (is_attribute_p ("vector_size", name))
1881 : return false;
1882 : }
1883 : return true;
1884 : }
1885 :
1886 : /* Like reconstruct_complex_type, but handle also template trees. */
1887 :
1888 : tree
1889 30605 : cp_reconstruct_complex_type (tree type, tree bottom)
1890 : {
1891 30605 : tree inner, outer;
1892 :
1893 30605 : if (TYPE_PTR_P (type))
1894 : {
1895 36 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1896 36 : outer = build_pointer_type_for_mode (inner, TYPE_MODE (type),
1897 36 : TYPE_REF_CAN_ALIAS_ALL (type));
1898 : }
1899 : else if (TYPE_REF_P (type))
1900 : {
1901 12 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1902 12 : outer = build_reference_type_for_mode (inner, TYPE_MODE (type),
1903 12 : TYPE_REF_CAN_ALIAS_ALL (type));
1904 : }
1905 : else if (TREE_CODE (type) == ARRAY_TYPE)
1906 : {
1907 30 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1908 30 : outer = build_cplus_array_type (inner, TYPE_DOMAIN (type));
1909 : /* Don't call cp_build_qualified_type on ARRAY_TYPEs, the
1910 : element type qualification will be handled by the recursive
1911 : cp_reconstruct_complex_type call and cp_build_qualified_type
1912 : for ARRAY_TYPEs changes the element type. */
1913 30 : return outer;
1914 : }
1915 : else if (TREE_CODE (type) == FUNCTION_TYPE)
1916 : {
1917 116 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1918 116 : outer = build_function_type (inner, TYPE_ARG_TYPES (type),
1919 116 : TYPE_NO_NAMED_ARGS_STDARG_P (type));
1920 116 : outer = apply_memfn_quals (outer, type_memfn_quals (type));
1921 : }
1922 : else if (TREE_CODE (type) == METHOD_TYPE)
1923 : {
1924 12 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1925 : /* The build_method_type_directly() routine prepends 'this' to argument list,
1926 : so we must compensate by getting rid of it. */
1927 12 : outer
1928 : = build_method_type_directly
1929 12 : (class_of_this_parm (type), inner,
1930 12 : TREE_CHAIN (TYPE_ARG_TYPES (type)));
1931 : }
1932 : else if (TREE_CODE (type) == OFFSET_TYPE)
1933 : {
1934 3 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1935 3 : outer = build_offset_type (TYPE_OFFSET_BASETYPE (type), inner);
1936 : }
1937 : else
1938 : return bottom;
1939 :
1940 179 : if (TYPE_ATTRIBUTES (type))
1941 0 : outer = cp_build_type_attribute_variant (outer, TYPE_ATTRIBUTES (type));
1942 179 : outer = cp_build_qualified_type (outer, cp_type_quals (type));
1943 179 : outer = cxx_copy_lang_qualifiers (outer, type);
1944 :
1945 179 : return outer;
1946 : }
1947 :
1948 : /* Replaces any constexpr expression that may be into the attributes
1949 : arguments with their reduced value. */
1950 :
1951 : void
1952 370869220 : cp_check_const_attributes (tree attributes)
1953 : {
1954 370869220 : if (attributes == error_mark_node)
1955 : return;
1956 :
1957 : tree attr;
1958 408740103 : for (attr = attributes; attr; attr = TREE_CHAIN (attr))
1959 : {
1960 : /* Annotation arguments are handled in handle_annotation_attribute. */
1961 37870883 : if (annotation_p (attr))
1962 348 : continue;
1963 :
1964 37870535 : tree arg;
1965 : /* As we implement alignas using gnu::aligned attribute and
1966 : alignas argument is a constant expression, force manifestly
1967 : constant evaluation of aligned attribute argument. */
1968 37870535 : bool manifestly_const_eval
1969 37870535 : = is_attribute_p ("aligned", get_attribute_name (attr));
1970 49329955 : for (arg = TREE_VALUE (attr); arg && TREE_CODE (arg) == TREE_LIST;
1971 11459420 : arg = TREE_CHAIN (arg))
1972 : {
1973 11459420 : tree expr = TREE_VALUE (arg);
1974 11459420 : if (EXPR_P (expr))
1975 7016 : TREE_VALUE (arg)
1976 3508 : = fold_non_dependent_expr (expr, tf_warning_or_error,
1977 : manifestly_const_eval);
1978 : }
1979 : }
1980 : }
1981 :
1982 : /* Copies hot or cold attributes to a function FN if present on the
1983 : encapsulating class, struct, or union TYPE. */
1984 :
1985 : void
1986 27950924 : maybe_propagate_warmth_attributes (tree fn, tree type)
1987 : {
1988 27950924 : if (fn == NULL_TREE || type == NULL_TREE
1989 27950924 : || !(TREE_CODE (type) == RECORD_TYPE
1990 : || TREE_CODE (type) == UNION_TYPE))
1991 : return;
1992 :
1993 27950924 : tree has_cold_attr = lookup_attribute ("cold", TYPE_ATTRIBUTES (type));
1994 27950924 : tree has_hot_attr = lookup_attribute ("hot", TYPE_ATTRIBUTES (type));
1995 :
1996 27950924 : if (has_cold_attr || has_hot_attr)
1997 : {
1998 : /* Transparently ignore the new warmth attribute if it
1999 : conflicts with a present function attribute. Otherwise
2000 : decl_attribute would still honour the present attribute,
2001 : but producing an undesired warning in the process. */
2002 :
2003 18 : if (has_cold_attr)
2004 : {
2005 9 : if (lookup_attribute ("hot", DECL_ATTRIBUTES (fn)) == NULL)
2006 : {
2007 9 : tree cold_cons
2008 9 : = tree_cons (get_identifier ("cold"), NULL, NULL);
2009 :
2010 9 : decl_attributes (&fn, cold_cons, 0);
2011 : }
2012 : }
2013 9 : else if (has_hot_attr)
2014 : {
2015 9 : if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn)) == NULL)
2016 : {
2017 9 : tree hot_cons
2018 9 : = tree_cons (get_identifier ("hot"), NULL, NULL);
2019 :
2020 9 : decl_attributes (&fn, hot_cons, 0);
2021 : }
2022 : }
2023 : }
2024 : }
2025 :
2026 : /* Return the last pushed declaration for the symbol DECL or NULL
2027 : when no such declaration exists. */
2028 :
2029 : static tree
2030 370804247 : find_last_decl (tree decl)
2031 : {
2032 370804247 : tree last_decl = NULL_TREE;
2033 :
2034 370804247 : if (tree name = DECL_P (decl) ? DECL_NAME (decl) : NULL_TREE)
2035 : {
2036 : /* Template specializations are matched elsewhere. */
2037 309241437 : if (DECL_LANG_SPECIFIC (decl)
2038 309241437 : && DECL_USE_TEMPLATE (decl))
2039 : return NULL_TREE;
2040 :
2041 : /* Look up the declaration in its scope. */
2042 304567221 : tree pushed_scope = NULL_TREE;
2043 304567221 : if (tree ctype = DECL_CONTEXT (decl))
2044 233690098 : pushed_scope = push_scope (ctype);
2045 :
2046 304567221 : last_decl = lookup_name (name);
2047 :
2048 304567221 : if (pushed_scope)
2049 131776185 : pop_scope (pushed_scope);
2050 :
2051 : /* The declaration may be a member conversion operator
2052 : or a bunch of overfloads (handle the latter below). */
2053 304567221 : if (last_decl && BASELINK_P (last_decl))
2054 172322 : last_decl = BASELINK_FUNCTIONS (last_decl);
2055 : }
2056 :
2057 61516804 : if (!last_decl)
2058 271998444 : return NULL_TREE;
2059 :
2060 94131587 : if (DECL_P (last_decl) || TREE_CODE (last_decl) == OVERLOAD)
2061 : {
2062 : /* A set of overloads of the same function. */
2063 535683769 : for (lkp_iterator iter (last_decl); iter; ++iter)
2064 : {
2065 451237058 : if (TREE_CODE (*iter) == OVERLOAD)
2066 0 : continue;
2067 :
2068 451237058 : tree d = *iter;
2069 :
2070 : /* We can't compare versions in the middle of processing the
2071 : attribute that has the version. */
2072 451237058 : if (TREE_CODE (d) == FUNCTION_DECL
2073 451237058 : && DECL_FUNCTION_VERSIONED (d))
2074 9666503 : return NULL_TREE;
2075 :
2076 451235930 : if (decls_match (decl, d, /*record_decls=*/false))
2077 : return d;
2078 : }
2079 84446711 : return NULL_TREE;
2080 : }
2081 :
2082 : return NULL_TREE;
2083 : }
2084 :
2085 : /* Like decl_attributes, but handle C++ complexity. */
2086 :
2087 : void
2088 370867235 : cplus_decl_attributes (tree *decl, tree attributes, int flags)
2089 : {
2090 370867235 : if (*decl == NULL_TREE || *decl == void_type_node
2091 370867235 : || *decl == error_mark_node || attributes == error_mark_node)
2092 : return;
2093 :
2094 : /* Add implicit "omp declare target" attribute if requested. */
2095 370867152 : if (vec_safe_length (scope_chain->omp_declare_target_attribute)
2096 10874 : && ((VAR_P (*decl)
2097 2156 : && (TREE_STATIC (*decl) || DECL_EXTERNAL (*decl)))
2098 3376 : || TREE_CODE (*decl) == FUNCTION_DECL))
2099 : {
2100 1697 : if (VAR_P (*decl)
2101 1697 : && DECL_CLASS_SCOPE_P (*decl))
2102 0 : error ("%q+D static data member inside of declare target directive",
2103 : *decl);
2104 : else
2105 : {
2106 1697 : if (VAR_P (*decl)
2107 1697 : && (processing_template_decl
2108 282 : || !omp_mappable_type (TREE_TYPE (*decl))))
2109 52 : attributes
2110 52 : = tree_cons (get_identifier ("omp declare target implicit"),
2111 : NULL_TREE, attributes);
2112 : else
2113 1645 : attributes = tree_cons (get_identifier ("omp declare target"),
2114 : NULL_TREE, attributes);
2115 1697 : if (TREE_CODE (*decl) == FUNCTION_DECL)
2116 : {
2117 1415 : cp_omp_declare_target_attr &last
2118 1415 : = scope_chain->omp_declare_target_attribute->last ();
2119 1415 : int device_type = MAX (last.device_type, 0);
2120 1415 : if ((device_type & OMP_CLAUSE_DEVICE_TYPE_HOST) != 0
2121 1415 : && !lookup_attribute ("omp declare target host",
2122 : attributes))
2123 6 : attributes
2124 6 : = tree_cons (get_identifier ("omp declare target host"),
2125 : NULL_TREE, attributes);
2126 1415 : if ((device_type & OMP_CLAUSE_DEVICE_TYPE_NOHOST) != 0
2127 1415 : && !lookup_attribute ("omp declare target nohost",
2128 : attributes))
2129 6 : attributes
2130 6 : = tree_cons (get_identifier ("omp declare target nohost"),
2131 : NULL_TREE, attributes);
2132 1415 : if (last.indirect
2133 1415 : && !lookup_attribute ("omp declare target indirect",
2134 : attributes))
2135 21 : attributes
2136 21 : = tree_cons (get_identifier ("omp declare target indirect"),
2137 : NULL_TREE, attributes);
2138 : }
2139 : }
2140 : }
2141 :
2142 370867152 : tree late_attrs = NULL_TREE;
2143 370867152 : if (processing_template_decl)
2144 : {
2145 230630871 : if (check_for_bare_parameter_packs (attributes))
2146 : return;
2147 230630862 : late_attrs = splice_template_attributes (&attributes, *decl);
2148 : }
2149 :
2150 370867143 : cp_check_const_attributes (attributes);
2151 :
2152 370867143 : if (flag_openmp || flag_openmp_simd)
2153 : {
2154 : bool diagnosed = false;
2155 1347969 : for (tree *pa = &attributes; *pa; )
2156 : {
2157 185996 : if (get_attribute_namespace (*pa) == omp_identifier)
2158 : {
2159 209 : tree name = get_attribute_name (*pa);
2160 209 : if (is_attribute_p ("directive", name)
2161 0 : || is_attribute_p ("sequence", name)
2162 209 : || is_attribute_p ("decl", name))
2163 : {
2164 209 : const char *p = NULL;
2165 209 : if (TREE_VALUE (*pa) == NULL_TREE)
2166 9 : p = IDENTIFIER_POINTER (name);
2167 409 : for (tree a = TREE_VALUE (*pa); a; a = TREE_CHAIN (a))
2168 : {
2169 200 : tree d = TREE_VALUE (a);
2170 200 : gcc_assert (TREE_CODE (d) == DEFERRED_PARSE);
2171 340 : if (TREE_PUBLIC (d)
2172 143 : && (VAR_P (*decl)
2173 10 : || TREE_CODE (*decl) == FUNCTION_DECL)
2174 343 : && cp_maybe_parse_omp_decl (*decl, d))
2175 140 : continue;
2176 60 : p = TREE_PUBLIC (d) ? "decl" : "directive";
2177 : }
2178 209 : if (p && !diagnosed)
2179 : {
2180 69 : error ("%<omp::%s%> not allowed to be specified in "
2181 : "this context", p);
2182 69 : diagnosed = true;
2183 : }
2184 209 : if (p)
2185 : {
2186 69 : *pa = TREE_CHAIN (*pa);
2187 69 : continue;
2188 : }
2189 : }
2190 : }
2191 185927 : pa = &TREE_CHAIN (*pa);
2192 : }
2193 : }
2194 :
2195 370867143 : if (TREE_CODE (*decl) == TEMPLATE_DECL)
2196 1012 : decl = &DECL_TEMPLATE_RESULT (*decl);
2197 :
2198 370867143 : if (TREE_TYPE (*decl) && TYPE_PTRMEMFUNC_P (TREE_TYPE (*decl)))
2199 : {
2200 62896 : attributes
2201 62896 : = decl_attributes (decl, attributes, flags | ATTR_FLAG_FUNCTION_NEXT);
2202 62896 : decl_attributes (&TYPE_PTRMEMFUNC_FN_TYPE_RAW (TREE_TYPE (*decl)),
2203 : attributes, flags);
2204 : }
2205 : else
2206 : {
2207 370804247 : tree last_decl = find_last_decl (*decl);
2208 370804247 : decl_attributes (decl, attributes, flags, last_decl);
2209 : }
2210 :
2211 370867143 : if (late_attrs)
2212 493859 : save_template_attributes (late_attrs, decl, flags);
2213 :
2214 : /* Propagate deprecation out to the template. */
2215 370867143 : if (TREE_DEPRECATED (*decl))
2216 1464059 : if (tree ti = get_template_info (*decl))
2217 : {
2218 462761 : tree tmpl = TI_TEMPLATE (ti);
2219 462761 : tree pattern = (TYPE_P (*decl) ? TREE_TYPE (tmpl)
2220 462761 : : DECL_TEMPLATE_RESULT (tmpl));
2221 462761 : if (*decl == pattern)
2222 414814 : TREE_DEPRECATED (tmpl) = true;
2223 : }
2224 :
2225 : /* Likewise, propagate unavailability out to the template. */
2226 370867143 : if (TREE_UNAVAILABLE (*decl))
2227 252 : if (tree ti = get_template_info (*decl))
2228 : {
2229 9 : tree tmpl = TI_TEMPLATE (ti);
2230 9 : tree pattern = (TYPE_P (*decl) ? TREE_TYPE (tmpl)
2231 9 : : DECL_TEMPLATE_RESULT (tmpl));
2232 9 : if (*decl == pattern)
2233 9 : TREE_UNAVAILABLE (tmpl) = true;
2234 : }
2235 :
2236 370867143 : if (VAR_P (*decl) && CP_DECL_THREAD_LOCAL_P (*decl))
2237 : {
2238 : // tls_model attribute can set a stronger TLS access model.
2239 19352 : tls_model model = DECL_TLS_MODEL (*decl);
2240 : // Don't upgrade TLS model if TLS model isn't set yet.
2241 19352 : if (model != TLS_MODEL_NONE)
2242 : {
2243 19228 : tls_model default_model = decl_default_tls_model (*decl);
2244 19228 : if (default_model > model)
2245 19010 : set_decl_tls_model (*decl, default_model);
2246 : }
2247 : }
2248 :
2249 : /* For target_version semantics, mark any annotated function as versioned
2250 : so that it gets mangled even when on its own in a TU. */
2251 : if (!TARGET_HAS_FMV_TARGET_ATTRIBUTE
2252 : && TREE_CODE (*decl) == FUNCTION_DECL
2253 : && get_target_version (*decl).is_valid ())
2254 : maybe_mark_function_versioned (*decl);
2255 : }
2256 :
2257 : /* Walks through the namespace- or function-scope anonymous union
2258 : OBJECT, with the indicated TYPE, building appropriate VAR_DECLs.
2259 : Returns one of the fields for use in the mangled name. */
2260 :
2261 : static tree
2262 374 : build_anon_union_vars (tree type, tree object)
2263 : {
2264 374 : tree main_decl = NULL_TREE;
2265 374 : tree field;
2266 :
2267 : /* Rather than write the code to handle the non-union case,
2268 : just give an error. */
2269 374 : if (TREE_CODE (type) != UNION_TYPE)
2270 : {
2271 6 : error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
2272 : "anonymous struct not inside named type");
2273 6 : return error_mark_node;
2274 : }
2275 :
2276 368 : for (field = TYPE_FIELDS (type);
2277 1313 : field != NULL_TREE;
2278 945 : field = DECL_CHAIN (field))
2279 : {
2280 945 : tree decl;
2281 945 : tree ref;
2282 :
2283 945 : if (DECL_ARTIFICIAL (field))
2284 465 : continue;
2285 480 : if (TREE_CODE (field) != FIELD_DECL)
2286 : {
2287 0 : permerror (DECL_SOURCE_LOCATION (field),
2288 : "%q#D invalid; an anonymous union can only "
2289 : "have non-static data members", field);
2290 0 : continue;
2291 : }
2292 :
2293 480 : if (TREE_PRIVATE (field))
2294 6 : permerror (DECL_SOURCE_LOCATION (field),
2295 : "private member %q#D in anonymous union", field);
2296 474 : else if (TREE_PROTECTED (field))
2297 0 : permerror (DECL_SOURCE_LOCATION (field),
2298 : "protected member %q#D in anonymous union", field);
2299 :
2300 480 : if (processing_template_decl)
2301 66 : ref = build_min_nt_loc (UNKNOWN_LOCATION, COMPONENT_REF, object,
2302 : field, NULL_TREE);
2303 : else
2304 414 : ref = build_class_member_access_expr (object, field, NULL_TREE,
2305 : false, tf_warning_or_error);
2306 :
2307 480 : if (DECL_NAME (field))
2308 : {
2309 443 : tree base;
2310 :
2311 443 : decl = build_decl (input_location,
2312 443 : VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
2313 443 : DECL_ANON_UNION_VAR_P (decl) = 1;
2314 443 : DECL_ARTIFICIAL (decl) = 1;
2315 :
2316 443 : base = get_base_address (object);
2317 443 : TREE_PUBLIC (decl) = TREE_PUBLIC (base);
2318 443 : TREE_STATIC (decl) = TREE_STATIC (base);
2319 443 : DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
2320 :
2321 443 : SET_DECL_VALUE_EXPR (decl, ref);
2322 443 : DECL_HAS_VALUE_EXPR_P (decl) = 1;
2323 :
2324 443 : decl = pushdecl (decl);
2325 : }
2326 37 : else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
2327 37 : decl = build_anon_union_vars (TREE_TYPE (field), ref);
2328 : else
2329 : decl = 0;
2330 :
2331 480 : if (main_decl == NULL_TREE)
2332 945 : main_decl = decl;
2333 : }
2334 :
2335 : return main_decl;
2336 : }
2337 :
2338 : /* Finish off the processing of a UNION_TYPE structure. If the union is an
2339 : anonymous union, then all members must be laid out together. PUBLIC_P
2340 : is nonzero if this union is not declared static. */
2341 :
2342 : void
2343 346 : finish_anon_union (tree anon_union_decl)
2344 : {
2345 346 : tree type;
2346 346 : tree main_decl;
2347 346 : bool public_p;
2348 :
2349 346 : if (anon_union_decl == error_mark_node)
2350 : return;
2351 :
2352 337 : type = TREE_TYPE (anon_union_decl);
2353 337 : public_p = TREE_PUBLIC (anon_union_decl);
2354 :
2355 : /* The VAR_DECL's context is the same as the TYPE's context. */
2356 337 : DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
2357 :
2358 337 : if (TYPE_FIELDS (type) == NULL_TREE)
2359 : return;
2360 :
2361 337 : if (public_p)
2362 : {
2363 0 : error ("namespace-scope anonymous aggregates must be static");
2364 0 : return;
2365 : }
2366 :
2367 337 : main_decl = build_anon_union_vars (type, anon_union_decl);
2368 337 : if (main_decl == error_mark_node)
2369 : return;
2370 313 : if (main_decl == NULL_TREE)
2371 : {
2372 12 : pedwarn (input_location, 0, "anonymous union with no members");
2373 12 : return;
2374 : }
2375 :
2376 301 : if (!processing_template_decl)
2377 : {
2378 : /* Use main_decl to set the mangled name. */
2379 262 : DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
2380 262 : maybe_commonize_var (anon_union_decl);
2381 262 : if (TREE_STATIC (anon_union_decl) || DECL_EXTERNAL (anon_union_decl))
2382 : {
2383 149 : if (DECL_DISCRIMINATOR_P (anon_union_decl))
2384 45 : determine_local_discriminator (anon_union_decl);
2385 149 : mangle_decl (anon_union_decl);
2386 : }
2387 262 : DECL_NAME (anon_union_decl) = NULL_TREE;
2388 : }
2389 :
2390 301 : pushdecl (anon_union_decl);
2391 301 : cp_finish_decl (anon_union_decl, NULL_TREE, false, NULL_TREE, 0);
2392 : }
2393 :
2394 : /* Auxiliary functions to make type signatures for
2395 : `operator new' and `operator delete' correspond to
2396 : what compiler will be expecting. */
2397 :
2398 : tree
2399 138153 : coerce_new_type (tree type, location_t loc)
2400 : {
2401 138153 : int e = 0;
2402 138153 : tree args = TYPE_ARG_TYPES (type);
2403 :
2404 138153 : gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
2405 :
2406 138153 : if (!same_type_p (TREE_TYPE (type), ptr_type_node))
2407 : {
2408 6 : e = 1;
2409 6 : error_at (loc, "%<operator new%> must return type %qT",
2410 : ptr_type_node);
2411 : }
2412 :
2413 138153 : if (args && args != void_list_node)
2414 : {
2415 138138 : if (TREE_PURPOSE (args))
2416 : {
2417 : /* [basic.stc.dynamic.allocation]
2418 :
2419 : The first parameter shall not have an associated default
2420 : argument. */
2421 18 : error_at (loc, "the first parameter of %<operator new%> cannot "
2422 : "have a default argument");
2423 : /* Throw away the default argument. */
2424 18 : TREE_PURPOSE (args) = NULL_TREE;
2425 : }
2426 :
2427 138138 : if (!same_type_p (TREE_VALUE (args), size_type_node))
2428 : {
2429 21 : e = 2;
2430 21 : args = TREE_CHAIN (args);
2431 : }
2432 : }
2433 : else
2434 : e = 2;
2435 :
2436 21 : if (e == 2)
2437 36 : permerror (loc, "%<operator new%> takes type %<size_t%> (%qT) "
2438 : "as first parameter", size_type_node);
2439 :
2440 138153 : switch (e)
2441 : {
2442 36 : case 2:
2443 36 : args = tree_cons (NULL_TREE, size_type_node, args);
2444 : /* Fall through. */
2445 42 : case 1:
2446 42 : type = (cxx_copy_lang_qualifiers
2447 42 : (build_function_type (ptr_type_node, args),
2448 : type));
2449 : /* Fall through. */
2450 138153 : default:;
2451 : }
2452 138153 : return type;
2453 : }
2454 :
2455 : void
2456 184988 : coerce_delete_type (tree decl, location_t loc)
2457 : {
2458 184988 : int e = 0;
2459 184988 : tree type = TREE_TYPE (decl);
2460 184988 : tree args = TYPE_ARG_TYPES (type);
2461 :
2462 184988 : gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
2463 :
2464 184988 : if (!same_type_p (TREE_TYPE (type), void_type_node))
2465 : {
2466 15 : e = 1;
2467 15 : error_at (loc, "%<operator delete%> must return type %qT",
2468 : void_type_node);
2469 : }
2470 :
2471 184988 : tree ptrtype = ptr_type_node;
2472 184988 : if (destroying_delete_p (decl))
2473 : {
2474 37 : if (DECL_CLASS_SCOPE_P (decl))
2475 : /* If the function is a destroying operator delete declared in class
2476 : type C, the type of its first parameter shall be C*. */
2477 37 : ptrtype = build_pointer_type (DECL_CONTEXT (decl));
2478 : else
2479 : /* A destroying operator delete shall be a class member function named
2480 : operator delete. */
2481 0 : error_at (loc,
2482 : "destroying %<operator delete%> must be a member function");
2483 37 : const ovl_op_info_t *op = IDENTIFIER_OVL_OP_INFO (DECL_NAME (decl));
2484 37 : if (op->flags & OVL_OP_FLAG_VEC)
2485 0 : error_at (loc, "%<operator delete[]%> cannot be a destroying delete");
2486 37 : if (!usual_deallocation_fn_p (decl))
2487 0 : error_at (loc, "destroying %<operator delete%> must be a usual "
2488 : "deallocation function");
2489 : }
2490 :
2491 184985 : if (!args || args == void_list_node
2492 369970 : || !same_type_p (TREE_VALUE (args), ptrtype))
2493 : {
2494 15 : e = 2;
2495 15 : if (args && args != void_list_node)
2496 9 : args = TREE_CHAIN (args);
2497 15 : error_at (loc, "%<operator delete%> takes type %qT as first parameter",
2498 : ptrtype);
2499 : }
2500 184973 : switch (e)
2501 : {
2502 15 : case 2:
2503 15 : args = tree_cons (NULL_TREE, ptrtype, args);
2504 : /* Fall through. */
2505 30 : case 1:
2506 30 : type = (cxx_copy_lang_qualifiers
2507 30 : (build_function_type (void_type_node, args),
2508 : type));
2509 : /* Fall through. */
2510 184988 : default:;
2511 : }
2512 :
2513 184988 : TREE_TYPE (decl) = type;
2514 184988 : }
2515 :
2516 : /* DECL is a VAR_DECL for a vtable: walk through the entries in the vtable
2517 : and mark them as needed. */
2518 :
2519 : static void
2520 422601 : mark_vtable_entries (tree decl, vec<tree> &consteval_vtables)
2521 : {
2522 : /* It's OK for the vtable to refer to deprecated virtual functions. */
2523 422601 : auto du = make_temp_override (deprecated_state,
2524 422601 : UNAVAILABLE_DEPRECATED_SUPPRESS);
2525 :
2526 422601 : bool consteval_seen = false;
2527 :
2528 6218140 : for (auto &e: CONSTRUCTOR_ELTS (DECL_INITIAL (decl)))
2529 : {
2530 4950337 : tree fnaddr = e.value;
2531 :
2532 4950337 : STRIP_NOPS (fnaddr);
2533 :
2534 7459320 : if (TREE_CODE (fnaddr) != ADDR_EXPR
2535 4950337 : && TREE_CODE (fnaddr) != FDESC_EXPR)
2536 : /* This entry is an offset: a virtual base class offset, a
2537 : virtual call offset, an RTTI offset, etc. */
2538 2508983 : continue;
2539 :
2540 2441354 : tree fn = TREE_OPERAND (fnaddr, 0);
2541 4382210 : if (TREE_CODE (fn) == FUNCTION_DECL && DECL_IMMEDIATE_FUNCTION_P (fn))
2542 : {
2543 1142 : if (!consteval_seen)
2544 : {
2545 397 : consteval_seen = true;
2546 397 : consteval_vtables.safe_push (decl);
2547 : }
2548 1142 : continue;
2549 : }
2550 2440212 : TREE_ADDRESSABLE (fn) = 1;
2551 : /* When we don't have vcall offsets, we output thunks whenever
2552 : we output the vtables that contain them. With vcall offsets,
2553 : we know all the thunks we'll need when we emit a virtual
2554 : function, so we emit the thunks there instead. */
2555 2440212 : if (DECL_THUNK_P (fn))
2556 3899 : use_thunk (fn, /*emit_p=*/0);
2557 : /* Set the location, as marking the function could cause
2558 : instantiation. We do not need to preserve the incoming
2559 : location, as we're called from c_parse_final_cleanups, which
2560 : takes care of that. */
2561 2440212 : input_location = DECL_SOURCE_LOCATION (fn);
2562 2440212 : mark_used (fn);
2563 : }
2564 422601 : }
2565 :
2566 : /* Replace any consteval functions in vtables with null pointers. */
2567 :
2568 : static void
2569 96437 : clear_consteval_vfns (vec<tree> &consteval_vtables)
2570 : {
2571 97594 : for (tree vtable : consteval_vtables)
2572 3150 : for (constructor_elt &elt : CONSTRUCTOR_ELTS (DECL_INITIAL (vtable)))
2573 : {
2574 1959 : tree fn = cp_get_fndecl_from_callee (elt.value, /*fold*/false);
2575 3118 : if (fn && DECL_IMMEDIATE_FUNCTION_P (fn))
2576 1144 : elt.value = build_zero_cst (vtable_entry_type);
2577 : }
2578 96437 : }
2579 :
2580 : /* Adjust the TLS model on variable DECL if need be, typically after
2581 : the linkage of DECL has been modified. */
2582 :
2583 : static void
2584 69508135 : adjust_var_decl_tls_model (tree decl)
2585 : {
2586 69508135 : if (CP_DECL_THREAD_LOCAL_P (decl)
2587 69508135 : && !lookup_attribute ("tls_model", DECL_ATTRIBUTES (decl)))
2588 296 : set_decl_tls_model (decl, decl_default_tls_model (decl));
2589 69508135 : }
2590 :
2591 : /* Set DECL up to have the closest approximation of "initialized common"
2592 : linkage available. */
2593 :
2594 : void
2595 125753425 : comdat_linkage (tree decl)
2596 : {
2597 125753425 : if (flag_weak)
2598 125753401 : make_decl_one_only (decl, cxx_comdat_group (decl));
2599 24 : else if (TREE_CODE (decl) == FUNCTION_DECL
2600 24 : || (VAR_P (decl) && DECL_ARTIFICIAL (decl)))
2601 : /* We can just emit function and compiler-generated variables
2602 : statically; having multiple copies is (for the most part) only
2603 : a waste of space.
2604 :
2605 : There are two correctness issues, however: the address of a
2606 : template instantiation with external linkage should be the
2607 : same, independent of what translation unit asks for the
2608 : address, and this will not hold when we emit multiple copies of
2609 : the function. However, there's little else we can do.
2610 :
2611 : Also, by default, the typeinfo implementation assumes that
2612 : there will be only one copy of the string used as the name for
2613 : each type. Therefore, if weak symbols are unavailable, the
2614 : run-time library should perform a more conservative check; it
2615 : should perform a string comparison, rather than an address
2616 : comparison. */
2617 24 : TREE_PUBLIC (decl) = 0;
2618 : else
2619 : {
2620 : /* Static data member template instantiations, however, cannot
2621 : have multiple copies. */
2622 0 : if (DECL_INITIAL (decl) == 0
2623 0 : || DECL_INITIAL (decl) == error_mark_node)
2624 0 : DECL_COMMON (decl) = 1;
2625 0 : else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
2626 : {
2627 0 : DECL_COMMON (decl) = 1;
2628 0 : DECL_INITIAL (decl) = error_mark_node;
2629 : }
2630 0 : else if (!DECL_EXPLICIT_INSTANTIATION (decl))
2631 : {
2632 : /* We can't do anything useful; leave vars for explicit
2633 : instantiation. */
2634 0 : DECL_EXTERNAL (decl) = 1;
2635 0 : DECL_NOT_REALLY_EXTERN (decl) = 0;
2636 : }
2637 : }
2638 :
2639 125753425 : if (TREE_PUBLIC (decl))
2640 125753401 : DECL_COMDAT (decl) = 1;
2641 :
2642 125753425 : if (VAR_P (decl))
2643 69507483 : adjust_var_decl_tls_model (decl);
2644 125753425 : }
2645 :
2646 : /* For win32 we also want to put explicit instantiations in
2647 : linkonce sections, so that they will be merged with implicit
2648 : instantiations; otherwise we get duplicate symbol errors.
2649 : For Darwin we do not want explicit instantiations to be
2650 : linkonce. */
2651 :
2652 : void
2653 699015 : maybe_make_one_only (tree decl)
2654 : {
2655 : /* We used to say that this was not necessary on targets that support weak
2656 : symbols, because the implicit instantiations will defer to the explicit
2657 : one. However, that's not actually the case in SVR4; a strong definition
2658 : after a weak one is an error. Also, not making explicit
2659 : instantiations one_only means that we can end up with two copies of
2660 : some template instantiations. */
2661 699015 : if (! flag_weak)
2662 : return;
2663 :
2664 : /* These are not to be output. */
2665 699012 : if (consteval_only_p (decl))
2666 : return;
2667 :
2668 : /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
2669 : we can get away with not emitting them if they aren't used. We need
2670 : to for variables so that cp_finish_decl will update their linkage,
2671 : because their DECL_INITIAL may not have been set properly yet. */
2672 :
2673 696429 : if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
2674 : || (! DECL_EXPLICIT_INSTANTIATION (decl)
2675 : && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
2676 : {
2677 696429 : make_decl_one_only (decl, cxx_comdat_group (decl));
2678 :
2679 696429 : if (VAR_P (decl))
2680 : {
2681 652 : varpool_node *node = varpool_node::get_create (decl);
2682 652 : DECL_COMDAT (decl) = 1;
2683 : /* Mark it needed so we don't forget to emit it. */
2684 652 : node->forced_by_abi = true;
2685 652 : TREE_USED (decl) = 1;
2686 :
2687 652 : adjust_var_decl_tls_model (decl);
2688 : }
2689 : }
2690 : }
2691 :
2692 : /* Returns true iff DECL, a FUNCTION_DECL or VAR_DECL, has vague linkage.
2693 : This predicate will give the right answer during parsing of the
2694 : function, which other tests may not. */
2695 :
2696 : bool
2697 37688086 : vague_linkage_p (tree decl)
2698 : {
2699 37688089 : if (!TREE_PUBLIC (decl))
2700 : {
2701 : /* maybe_thunk_body clears TREE_PUBLIC and DECL_ABSTRACT_P on the
2702 : maybe-in-charge 'tor variants; in that case we need to check one of
2703 : the "clones" for the real linkage. But only in that case; before
2704 : maybe_clone_body we haven't yet copied the linkage to the clones. */
2705 7994 : if (DECL_MAYBE_IN_CHARGE_CDTOR_P (decl)
2706 183 : && !DECL_ABSTRACT_P (decl)
2707 3 : && DECL_CHAIN (decl)
2708 4082 : && DECL_CLONED_FUNCTION_P (DECL_CHAIN (decl)))
2709 3 : return vague_linkage_p (DECL_CHAIN (decl));
2710 :
2711 4076 : gcc_checking_assert (!DECL_COMDAT (decl));
2712 : return false;
2713 : }
2714 : /* Unfortunately, import_export_decl has not always been called
2715 : before the function is processed, so we cannot simply check
2716 : DECL_COMDAT. */
2717 37684010 : if (DECL_COMDAT (decl)
2718 917085 : || (TREE_CODE (decl) == FUNCTION_DECL
2719 907132 : && DECL_NONGNU_INLINE_P (decl))
2720 63104 : || (DECL_LANG_SPECIFIC (decl)
2721 62654 : && DECL_TEMPLOID_INSTANTIATION (decl))
2722 37718194 : || (VAR_P (decl) && DECL_INLINE_VAR_P (decl)))
2723 37654215 : return true;
2724 29795 : else if (DECL_FUNCTION_SCOPE_P (decl))
2725 : /* A local static in an inline effectively has vague linkage. */
2726 0 : return (TREE_STATIC (decl)
2727 0 : && vague_linkage_p (DECL_CONTEXT (decl)));
2728 : else
2729 : return false;
2730 : }
2731 :
2732 : /* Determine whether or not we want to specifically import or export CTYPE,
2733 : using various heuristics. */
2734 :
2735 : static void
2736 4010827 : import_export_class (tree ctype)
2737 : {
2738 : /* -1 for imported, 1 for exported. */
2739 4010827 : int import_export = 0;
2740 :
2741 : /* It only makes sense to call this function at EOF. The reason is
2742 : that this function looks at whether or not the first non-inline
2743 : non-abstract virtual member function has been defined in this
2744 : translation unit. But, we can't possibly know that until we've
2745 : seen the entire translation unit. */
2746 4010827 : gcc_assert (at_eof);
2747 :
2748 4010827 : if (CLASSTYPE_INTERFACE_KNOWN (ctype))
2749 : return;
2750 :
2751 : /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
2752 : we will have CLASSTYPE_INTERFACE_ONLY set but not
2753 : CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
2754 : heuristic because someone will supply a #pragma implementation
2755 : elsewhere, and deducing it here would produce a conflict. */
2756 2278943 : if (CLASSTYPE_INTERFACE_ONLY (ctype))
2757 : return;
2758 :
2759 2278943 : if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
2760 : import_export = -1;
2761 2278943 : else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
2762 : import_export = 1;
2763 2278943 : else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
2764 2278943 : && !flag_implicit_templates)
2765 : /* For a template class, without -fimplicit-templates, check the
2766 : repository. If the virtual table is assigned to this
2767 : translation unit, then export the class; otherwise, import
2768 : it. */
2769 : import_export = -1;
2770 2278298 : else if (TYPE_CONTAINS_VPTR_P (ctype))
2771 : {
2772 2112298 : tree cdecl = TYPE_NAME (ctype);
2773 2115609 : if (DECL_LANG_SPECIFIC (cdecl) && DECL_MODULE_ATTACH_P (cdecl))
2774 : /* For class types attached to a named module, the ABI specifies
2775 : that the tables are uniquely emitted in the object for the
2776 : module unit in which it is defined. */
2777 1740 : import_export = (DECL_MODULE_IMPORT_P (cdecl) ? -1 : 1);
2778 : else
2779 : {
2780 : /* The ABI specifies that the virtual table and associated
2781 : information are emitted with the key method, if any. */
2782 2112103 : tree method = CLASSTYPE_KEY_METHOD (ctype);
2783 : /* If weak symbol support is not available, then we must be
2784 : careful not to emit the vtable when the key function is
2785 : inline. An inline function can be defined in multiple
2786 : translation units. If we were to emit the vtable in each
2787 : translation unit containing a definition, we would get
2788 : multiple definition errors at link-time. */
2789 2088501 : if (method && (flag_weak || ! DECL_NONGNU_INLINE_P (method)))
2790 559153 : import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
2791 : }
2792 : }
2793 :
2794 : /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
2795 : a definition anywhere else. */
2796 2278943 : if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
2797 : import_export = 0;
2798 :
2799 : /* Allow back ends the chance to overrule the decision. */
2800 2278943 : if (targetm.cxx.import_export_class)
2801 0 : import_export = targetm.cxx.import_export_class (ctype, import_export);
2802 :
2803 2278943 : if (import_export)
2804 : {
2805 559993 : SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
2806 559993 : CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
2807 : }
2808 : }
2809 :
2810 : /* Return true if VAR has already been provided to the back end; in that
2811 : case VAR should not be modified further by the front end. */
2812 : static bool
2813 113968891 : var_finalized_p (tree var)
2814 : {
2815 0 : return varpool_node::get_create (var)->definition;
2816 : }
2817 :
2818 : /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
2819 : must be emitted in this translation unit. Mark it as such. */
2820 :
2821 : void
2822 49760 : mark_needed (tree decl)
2823 : {
2824 : /* These are not to be output. */
2825 49760 : if (consteval_only_p (decl))
2826 : return;
2827 :
2828 49755 : TREE_USED (decl) = 1;
2829 49755 : if (TREE_CODE (decl) == FUNCTION_DECL)
2830 : {
2831 : /* Extern inline functions don't become needed when referenced.
2832 : If we know a method will be emitted in other TU and no new
2833 : functions can be marked reachable, just use the external
2834 : definition. */
2835 41689 : struct cgraph_node *node = cgraph_node::get_create (decl);
2836 41689 : node->forced_by_abi = true;
2837 :
2838 : /* #pragma interface can call mark_needed for
2839 : maybe-in-charge 'tors; mark the clones as well. */
2840 41689 : tree clone;
2841 50083 : FOR_EACH_CLONE (clone, decl)
2842 8394 : mark_needed (clone);
2843 : }
2844 8066 : else if (VAR_P (decl))
2845 : {
2846 8066 : varpool_node *node = varpool_node::get_create (decl);
2847 : /* C++ frontend use mark_decl_references to force COMDAT variables
2848 : to be output that might appear dead otherwise. */
2849 8066 : node->forced_by_abi = true;
2850 : }
2851 : }
2852 :
2853 : /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
2854 : returns true if a definition of this entity should be provided in
2855 : this object file. Callers use this function to determine whether
2856 : or not to let the back end know that a definition of DECL is
2857 : available in this translation unit. */
2858 :
2859 : bool
2860 360275322 : decl_needed_p (tree decl)
2861 : {
2862 360275322 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
2863 : /* This function should only be called at the end of the translation
2864 : unit. We cannot be sure of whether or not something will be
2865 : COMDAT until that point. */
2866 360275322 : gcc_assert (at_eof);
2867 :
2868 : /* All entities with external linkage that are not COMDAT/EXTERN should be
2869 : emitted; they may be referred to from other object files. */
2870 360275322 : if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_REALLY_EXTERN (decl))
2871 : return true;
2872 :
2873 : /* Functions marked "dllexport" must be emitted so that they are
2874 : visible to other DLLs. */
2875 360275042 : if (flag_keep_inline_dllexport
2876 360275042 : && lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)))
2877 : return true;
2878 :
2879 : /* When not optimizing, do not bother to produce definitions for extern
2880 : symbols. */
2881 434302439 : if (DECL_REALLY_EXTERN (decl)
2882 0 : && ((TREE_CODE (decl) != FUNCTION_DECL
2883 0 : && !optimize)
2884 0 : || (TREE_CODE (decl) == FUNCTION_DECL
2885 0 : && !opt_for_fn (decl, optimize)))
2886 360275042 : && !lookup_attribute ("always_inline", decl))
2887 : return false;
2888 :
2889 : /* If this entity was used, let the back end see it; it will decide
2890 : whether or not to emit it into the object file. */
2891 360275042 : if (TREE_USED (decl))
2892 : return true;
2893 :
2894 : /* Virtual functions might be needed for devirtualization. */
2895 64666859 : if (flag_devirtualize
2896 62832430 : && TREE_CODE (decl) == FUNCTION_DECL
2897 126241496 : && DECL_VIRTUAL_P (decl))
2898 : return true;
2899 :
2900 : /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
2901 : reference to DECL might cause it to be emitted later. */
2902 : return false;
2903 : }
2904 :
2905 : /* If necessary, write out the vtables for the dynamic class CTYPE.
2906 : Returns true if any vtables were emitted. */
2907 :
2908 : static bool
2909 3653529 : maybe_emit_vtables (tree ctype, vec<tree> &consteval_vtables)
2910 : {
2911 3653529 : tree vtbl;
2912 3653529 : tree primary_vtbl;
2913 3653529 : int needed = 0;
2914 3653529 : varpool_node *current = NULL, *last = NULL;
2915 :
2916 : /* If the vtables for this class have already been emitted there is
2917 : nothing more to do. */
2918 3653529 : primary_vtbl = CLASSTYPE_VTABLES (ctype);
2919 3653529 : if (var_finalized_p (primary_vtbl))
2920 : return false;
2921 : /* Ignore dummy vtables made by get_vtable_decl. */
2922 3653529 : if (TREE_TYPE (primary_vtbl) == void_type_node)
2923 : return false;
2924 :
2925 : /* On some targets, we cannot determine the key method until the end
2926 : of the translation unit -- which is when this function is
2927 : called. */
2928 3653529 : if (!targetm.cxx.key_method_may_be_inline ())
2929 0 : determine_key_method (ctype);
2930 :
2931 : /* See if any of the vtables are needed. */
2932 8903321 : for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = DECL_CHAIN (vtbl))
2933 : {
2934 5249792 : import_export_decl (vtbl);
2935 5249792 : if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
2936 : needed = 1;
2937 : }
2938 3653529 : if (!needed)
2939 : {
2940 : /* If the references to this class' vtables are optimized away,
2941 : still emit the appropriate debugging information. See
2942 : dfs_debug_mark. */
2943 3250791 : if (DECL_COMDAT (primary_vtbl)
2944 3250791 : && CLASSTYPE_DEBUG_REQUESTED (ctype))
2945 37328 : note_debug_info_needed (ctype);
2946 3250791 : return false;
2947 : }
2948 :
2949 : /* The ABI requires that we emit all of the vtables if we emit any
2950 : of them. */
2951 825339 : for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = DECL_CHAIN (vtbl))
2952 : {
2953 : /* Mark entities references from the virtual table as used. */
2954 422601 : mark_vtable_entries (vtbl, consteval_vtables);
2955 :
2956 422601 : if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
2957 : {
2958 0 : vec<tree, va_gc> *cleanups = NULL;
2959 0 : tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl), &cleanups,
2960 : LOOKUP_NORMAL);
2961 :
2962 : /* It had better be all done at compile-time. */
2963 0 : gcc_assert (!expr && !cleanups);
2964 : }
2965 :
2966 : /* Write it out. */
2967 422601 : DECL_EXTERNAL (vtbl) = 0;
2968 422601 : rest_of_decl_compilation (vtbl, 1, 1);
2969 :
2970 : /* Because we're only doing syntax-checking, we'll never end up
2971 : actually marking the variable as written. */
2972 422601 : if (flag_syntax_only)
2973 33 : TREE_ASM_WRITTEN (vtbl) = 1;
2974 422568 : else if (DECL_ONE_ONLY (vtbl))
2975 : {
2976 421886 : current = varpool_node::get_create (vtbl);
2977 421886 : if (last)
2978 19793 : current->add_to_same_comdat_group (last);
2979 : last = current;
2980 : }
2981 : }
2982 :
2983 : /* For abstract classes, the destructor has been removed from the
2984 : vtable (in class.cc's build_vtbl_initializer). For a compiler-
2985 : generated destructor, it hence might not have been generated in
2986 : this translation unit - and with '#pragma interface' it might
2987 : never get generated. */
2988 402738 : if (CLASSTYPE_PURE_VIRTUALS (ctype)
2989 123441 : && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (ctype)
2990 67839 : && !CLASSTYPE_LAZY_DESTRUCTOR (ctype)
2991 470574 : && DECL_DEFAULTED_IN_CLASS_P (CLASSTYPE_DESTRUCTOR (ctype)))
2992 65 : note_vague_linkage_fn (CLASSTYPE_DESTRUCTOR (ctype));
2993 :
2994 : /* Since we're writing out the vtable here, also write the debug
2995 : info. */
2996 402738 : note_debug_info_needed (ctype);
2997 :
2998 402738 : return true;
2999 : }
3000 :
3001 : /* A special return value from type_visibility meaning internal
3002 : linkage. */
3003 :
3004 : enum { VISIBILITY_ANON = VISIBILITY_INTERNAL+1 };
3005 :
3006 : static int expr_visibility (tree);
3007 : static int type_visibility (tree);
3008 :
3009 : /* walk_tree helper function for type_visibility. */
3010 :
3011 : static tree
3012 4147682880 : min_vis_r (tree *tp, int *walk_subtrees, void *data)
3013 : {
3014 4147682880 : int *vis_p = (int *)data;
3015 4147682880 : int this_vis = VISIBILITY_DEFAULT;
3016 4147682880 : if (! TYPE_P (*tp))
3017 826545218 : *walk_subtrees = 0;
3018 3321137662 : else if (OVERLOAD_TYPE_P (*tp)
3019 4358776910 : && !TREE_PUBLIC (TYPE_MAIN_DECL (*tp)))
3020 : {
3021 912037 : this_vis = VISIBILITY_ANON;
3022 912037 : *walk_subtrees = 0;
3023 : }
3024 3320225625 : else if (CLASS_TYPE_P (*tp))
3025 : {
3026 1009407120 : this_vis = CLASSTYPE_VISIBILITY (*tp);
3027 1009407120 : *walk_subtrees = 0;
3028 : }
3029 2310818505 : else if (TREE_CODE (*tp) == ARRAY_TYPE
3030 2310818505 : && uses_template_parms (TYPE_DOMAIN (*tp)))
3031 420431 : this_vis = expr_visibility (TYPE_MAX_VALUE (TYPE_DOMAIN (*tp)));
3032 :
3033 4147682880 : if (this_vis > *vis_p)
3034 1606179 : *vis_p = this_vis;
3035 :
3036 : /* Tell cp_walk_subtrees to look through typedefs. */
3037 4147682880 : if (*walk_subtrees == 1)
3038 2310818505 : *walk_subtrees = 2;
3039 :
3040 4147682880 : return NULL;
3041 : }
3042 :
3043 : /* walk_tree helper function for expr_visibility. */
3044 :
3045 : static tree
3046 253884791 : min_vis_expr_r (tree *tp, int *walk_subtrees, void *data)
3047 : {
3048 253884791 : int *vis_p = (int *)data;
3049 253884791 : int tpvis = VISIBILITY_DEFAULT;
3050 :
3051 253884791 : tree t = *tp;
3052 253884791 : if (TREE_CODE (t) == PTRMEM_CST)
3053 765 : t = PTRMEM_CST_MEMBER (t);
3054 :
3055 253884791 : if (TREE_CODE (t) == TEMPLATE_DECL)
3056 : {
3057 6735199 : if (DECL_ALIAS_TEMPLATE_P (t) || concept_definition_p (t))
3058 : /* FIXME: We don't maintain TREE_PUBLIC / DECL_VISIBILITY for
3059 : alias templates so we can't trust it here (PR107906). Ditto
3060 : for concepts. */
3061 : return NULL_TREE;
3062 : t = DECL_TEMPLATE_RESULT (t);
3063 : if (!t)
3064 : return NULL_TREE;
3065 : }
3066 :
3067 253158508 : switch (TREE_CODE (t))
3068 : {
3069 8231353 : case CAST_EXPR:
3070 8231353 : case IMPLICIT_CONV_EXPR:
3071 8231353 : case STATIC_CAST_EXPR:
3072 8231353 : case REINTERPRET_CAST_EXPR:
3073 8231353 : case CONST_CAST_EXPR:
3074 8231353 : case DYNAMIC_CAST_EXPR:
3075 8231353 : case NEW_EXPR:
3076 8231353 : case CONSTRUCTOR:
3077 8231353 : case LAMBDA_EXPR:
3078 8231353 : case TYPE_DECL:
3079 8231353 : tpvis = type_visibility (TREE_TYPE (t));
3080 8231353 : break;
3081 :
3082 4358 : case ADDR_EXPR:
3083 4358 : t = TREE_OPERAND (t, 0);
3084 4358 : if (VAR_P (t))
3085 : /* If a variable has its address taken, the lvalue-rvalue conversion is
3086 : not applied, so skip that case. */
3087 1932 : goto addressable;
3088 : break;
3089 :
3090 8700777 : case VAR_DECL:
3091 8700777 : case FUNCTION_DECL:
3092 8700777 : if (decl_constant_var_p (t))
3093 : /* The ODR allows definitions in different TUs to refer to distinct
3094 : constant variables with internal or no linkage, so such a reference
3095 : shouldn't affect visibility if the lvalue-rvalue conversion is
3096 : applied (PR110323). We still want to restrict visibility according
3097 : to the type of the declaration however. */
3098 : {
3099 4851468 : tpvis = type_visibility (TREE_TYPE (t));
3100 4851468 : break;
3101 : }
3102 3849309 : addressable:
3103 : /* For _DECLs with no linkage refer to the linkage of the containing
3104 : entity that does have a name with linkage. */
3105 3851414 : if (decl_linkage (t) == lk_none)
3106 20416 : tpvis = expr_visibility (DECL_CONTEXT (t));
3107 : /* Decls that have had their visibility constrained will report
3108 : as external linkage, but we still want to transitively constrain
3109 : if we refer to them, so just check TREE_PUBLIC instead. */
3110 3830998 : else if (!TREE_PUBLIC (t))
3111 : tpvis = VISIBILITY_ANON;
3112 : else
3113 3829533 : tpvis = DECL_VISIBILITY (t);
3114 : break;
3115 :
3116 975 : case FIELD_DECL:
3117 975 : tpvis = type_visibility (DECL_CONTEXT (t));
3118 975 : break;
3119 :
3120 746 : case REFLECT_EXPR:
3121 746 : tree r;
3122 746 : r = REFLECT_EXPR_HANDLE (t);
3123 746 : switch (REFLECT_EXPR_KIND (t))
3124 : {
3125 17 : case REFLECT_BASE:
3126 : /* For direct base class relationship, determine visibility
3127 : from both D and B types. */
3128 17 : tpvis = type_visibility (BINFO_TYPE (r));
3129 17 : if (tpvis > *vis_p)
3130 1 : *vis_p = tpvis;
3131 17 : tpvis = type_visibility (direct_base_derived (r));
3132 17 : *walk_subtrees = 0;
3133 17 : break;
3134 17 : case REFLECT_DATA_MEMBER_SPEC:
3135 : /* For data member description determine visibility
3136 : from the type. */
3137 17 : tpvis = type_visibility (TREE_VEC_ELT (r, 0));
3138 17 : *walk_subtrees = 0;
3139 17 : break;
3140 25 : case REFLECT_PARM:
3141 : /* For function parameter reflection determine visibility
3142 : based on parent_of. */
3143 25 : tpvis = expr_visibility (DECL_CONTEXT (r));
3144 25 : *walk_subtrees = 0;
3145 25 : break;
3146 3 : case REFLECT_ANNOTATION:
3147 : /* Annotations are always local to the TU. */
3148 3 : tpvis = VISIBILITY_ANON;
3149 3 : *walk_subtrees = 0;
3150 3 : break;
3151 8 : case REFLECT_OBJECT:
3152 8 : r = get_base_address (r);
3153 684 : gcc_fallthrough ();
3154 684 : default:
3155 684 : if (TYPE_P (r))
3156 : {
3157 129 : tpvis = type_visibility (r);
3158 129 : *walk_subtrees = 0;
3159 129 : break;
3160 : }
3161 555 : if (VAR_P (r) || TREE_CODE (r) == PARM_DECL)
3162 : {
3163 173 : t = r;
3164 173 : goto addressable;
3165 : }
3166 : break;
3167 : }
3168 : break;
3169 :
3170 : default:
3171 : break;
3172 : }
3173 :
3174 253158508 : if (tpvis > *vis_p)
3175 3232 : *vis_p = tpvis;
3176 :
3177 : return NULL_TREE;
3178 : }
3179 :
3180 : /* Returns the visibility of TYPE, which is the minimum visibility of its
3181 : component types. */
3182 :
3183 : static int
3184 1218322866 : type_visibility (tree type)
3185 : {
3186 1218322866 : int vis = VISIBILITY_DEFAULT;
3187 1218322866 : cp_walk_tree_without_duplicates (&type, min_vis_r, &vis);
3188 1218322866 : return vis;
3189 : }
3190 :
3191 : /* Returns the visibility of an expression EXPR that appears in the signature
3192 : of a function template, which is the minimum visibility of names that appear
3193 : in its mangling. */
3194 :
3195 : static int
3196 88534743 : expr_visibility (tree expr)
3197 : {
3198 88534743 : int vis = VISIBILITY_DEFAULT;
3199 88534743 : cp_walk_tree_without_duplicates (&expr, min_vis_expr_r, &vis);
3200 88534743 : return vis;
3201 : }
3202 :
3203 : /* Limit the visibility of DECL to VISIBILITY, if not explicitly
3204 : specified (or if VISIBILITY is static). If TMPL is true, this
3205 : constraint is for a template argument, and takes precedence
3206 : over explicitly-specified visibility on the template. */
3207 :
3208 : static void
3209 90658759 : constrain_visibility (tree decl, int visibility, bool tmpl)
3210 : {
3211 90658759 : if (visibility == VISIBILITY_ANON)
3212 : {
3213 : /* extern "C" declarations aren't affected by the anonymous
3214 : namespace. */
3215 1324214 : if (!DECL_EXTERN_C_P (decl))
3216 : {
3217 1324041 : TREE_PUBLIC (decl) = 0;
3218 1324041 : DECL_WEAK (decl) = 0;
3219 1324041 : DECL_COMMON (decl) = 0;
3220 1324041 : DECL_COMDAT (decl) = false;
3221 1324041 : if (VAR_OR_FUNCTION_DECL_P (decl))
3222 : {
3223 389063 : struct symtab_node *snode = symtab_node::get (decl);
3224 :
3225 389063 : if (snode)
3226 32464 : snode->set_comdat_group (NULL);
3227 : }
3228 1324041 : DECL_INTERFACE_KNOWN (decl) = 1;
3229 1324041 : if (DECL_LANG_SPECIFIC (decl))
3230 392708 : DECL_NOT_REALLY_EXTERN (decl) = 1;
3231 : }
3232 : }
3233 89334545 : else if (visibility > DECL_VISIBILITY (decl)
3234 89334545 : && (tmpl || !DECL_VISIBILITY_SPECIFIED (decl)))
3235 : {
3236 309 : DECL_VISIBILITY (decl) = (enum symbol_visibility) visibility;
3237 : /* This visibility was not specified. */
3238 309 : DECL_VISIBILITY_SPECIFIED (decl) = false;
3239 : }
3240 90658759 : }
3241 :
3242 : /* Constrain the visibility of DECL based on the visibility of its template
3243 : arguments. */
3244 :
3245 : static void
3246 376820242 : constrain_visibility_for_template (tree decl, tree targs)
3247 : {
3248 : /* If this is a template instantiation, check the innermost
3249 : template args for visibility constraints. The outer template
3250 : args are covered by the class check. */
3251 376820242 : tree args = INNERMOST_TEMPLATE_ARGS (targs);
3252 376820242 : int i;
3253 1084038942 : for (i = TREE_VEC_LENGTH (args); i > 0; --i)
3254 : {
3255 707218700 : int vis = 0;
3256 :
3257 707218700 : tree arg = TREE_VEC_ELT (args, i-1);
3258 707218700 : if (TYPE_P (arg))
3259 620899292 : vis = type_visibility (arg);
3260 : else
3261 86319408 : vis = expr_visibility (arg);
3262 707218700 : if (vis)
3263 338290 : constrain_visibility (decl, vis, true);
3264 : }
3265 376820242 : }
3266 :
3267 : /* Like c_determine_visibility, but with additional C++-specific
3268 : behavior.
3269 :
3270 : Function-scope entities can rely on the function's visibility because
3271 : it is set in start_preparsed_function.
3272 :
3273 : Class-scope entities cannot rely on the class's visibility until the end
3274 : of the enclosing class definition.
3275 :
3276 : Note that because namespaces have multiple independent definitions,
3277 : namespace visibility is handled elsewhere using the #pragma visibility
3278 : machinery rather than by decorating the namespace declaration.
3279 :
3280 : The goal is for constraints from the type to give a diagnostic, and
3281 : other constraints to be applied silently. */
3282 :
3283 : void
3284 731128027 : determine_visibility (tree decl)
3285 : {
3286 : /* Remember that all decls get VISIBILITY_DEFAULT when built. */
3287 :
3288 : /* Only relevant for names with external linkage. */
3289 731128027 : if (!TREE_PUBLIC (decl))
3290 : return;
3291 :
3292 : /* Cloned constructors and destructors get the same visibility as
3293 : the underlying function. That should be set up in
3294 : maybe_clone_body. */
3295 667449625 : gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
3296 :
3297 667449625 : bool orig_visibility_specified = DECL_VISIBILITY_SPECIFIED (decl);
3298 667449625 : enum symbol_visibility orig_visibility = DECL_VISIBILITY (decl);
3299 :
3300 : /* The decl may be a template instantiation, which could influence
3301 : visibilty. */
3302 667449625 : tree template_decl = NULL_TREE;
3303 667449625 : if (TREE_CODE (decl) == TYPE_DECL)
3304 : {
3305 183717910 : if (CLASS_TYPE_P (TREE_TYPE (decl)))
3306 : {
3307 180671024 : if (CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl)))
3308 382065181 : template_decl = decl;
3309 : }
3310 3046886 : else if (TYPE_TEMPLATE_INFO (TREE_TYPE (decl)))
3311 382065181 : template_decl = decl;
3312 : }
3313 483731715 : else if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3314 : template_decl = decl;
3315 :
3316 667449625 : if (TREE_CODE (decl) == TYPE_DECL
3317 363321757 : && LAMBDA_TYPE_P (TREE_TYPE (decl))
3318 671007788 : && CLASSTYPE_LAMBDA_EXPR (TREE_TYPE (decl)) != error_mark_node)
3319 3553018 : if (tree extra = LAMBDA_TYPE_EXTRA_SCOPE (TREE_TYPE (decl)))
3320 : {
3321 : /* The lambda's visibility is limited by that of its extra
3322 : scope. */
3323 1774463 : int vis = 0;
3324 1774463 : if (TYPE_P (extra))
3325 0 : vis = type_visibility (extra);
3326 : else
3327 1774463 : vis = expr_visibility (extra);
3328 1774463 : constrain_visibility (decl, vis, false);
3329 : }
3330 :
3331 : /* If DECL is a member of a class, visibility specifiers on the
3332 : class can influence the visibility of the DECL. */
3333 667449625 : tree class_type = NULL_TREE;
3334 667449625 : if (DECL_CLASS_SCOPE_P (decl))
3335 333751318 : class_type = DECL_CONTEXT (decl);
3336 : else
3337 : {
3338 : /* Not a class member. */
3339 :
3340 : /* Virtual tables have DECL_CONTEXT set to their associated class,
3341 : so they are automatically handled above. */
3342 333698307 : gcc_assert (!VAR_P (decl)
3343 : || !DECL_VTABLE_OR_VTT_P (decl));
3344 :
3345 333698307 : if (DECL_FUNCTION_SCOPE_P (decl) && ! DECL_VISIBILITY_SPECIFIED (decl))
3346 : {
3347 : /* Local statics and classes get the visibility of their
3348 : containing function by default, except that
3349 : -fvisibility-inlines-hidden doesn't affect them. */
3350 2703302 : tree fn = DECL_CONTEXT (decl);
3351 2703302 : if (DECL_VISIBILITY_SPECIFIED (fn))
3352 : {
3353 2635771 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
3354 2635771 : DECL_VISIBILITY_SPECIFIED (decl) =
3355 2635771 : DECL_VISIBILITY_SPECIFIED (fn);
3356 : }
3357 : else
3358 : {
3359 67531 : if (DECL_CLASS_SCOPE_P (fn))
3360 35892 : determine_visibility_from_class (decl, DECL_CONTEXT (fn));
3361 31639 : else if (determine_hidden_inline (fn))
3362 : {
3363 6 : DECL_VISIBILITY (decl) = default_visibility;
3364 6 : DECL_VISIBILITY_SPECIFIED (decl) =
3365 6 : visibility_options.inpragma;
3366 : }
3367 : else
3368 : {
3369 31633 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
3370 31633 : DECL_VISIBILITY_SPECIFIED (decl) =
3371 31633 : DECL_VISIBILITY_SPECIFIED (fn);
3372 : }
3373 : }
3374 :
3375 : /* Local classes in templates have CLASSTYPE_USE_TEMPLATE set,
3376 : but have no TEMPLATE_INFO, so don't try to check it. */
3377 : template_decl = NULL_TREE;
3378 : }
3379 59051353 : else if (VAR_P (decl) && DECL_TINFO_P (decl)
3380 336213794 : && flag_visibility_ms_compat)
3381 : {
3382 : /* Under -fvisibility-ms-compat, types are visible by default,
3383 : even though their contents aren't. */
3384 84 : tree underlying_type = TREE_TYPE (DECL_NAME (decl));
3385 84 : int underlying_vis = type_visibility (underlying_type);
3386 84 : if (underlying_vis == VISIBILITY_ANON
3387 84 : || (CLASS_TYPE_P (underlying_type)
3388 69 : && CLASSTYPE_VISIBILITY_SPECIFIED (underlying_type)))
3389 54 : constrain_visibility (decl, underlying_vis, false);
3390 : else
3391 30 : DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3392 : }
3393 330994921 : else if (VAR_P (decl) && DECL_TINFO_P (decl))
3394 : {
3395 : /* tinfo visibility is based on the type it's for. */
3396 5218705 : constrain_visibility
3397 5218705 : (decl, type_visibility (TREE_TYPE (DECL_NAME (decl))), false);
3398 :
3399 : /* Give the target a chance to override the visibility associated
3400 : with DECL. */
3401 5218705 : if (TREE_PUBLIC (decl)
3402 5216865 : && !DECL_REALLY_EXTERN (decl)
3403 5216865 : && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl)))
3404 10405765 : && !CLASSTYPE_VISIBILITY_SPECIFIED (TREE_TYPE (DECL_NAME (decl))))
3405 106951 : targetm.cxx.determine_class_data_visibility (decl);
3406 : }
3407 325776216 : else if (template_decl)
3408 : /* Template instantiations and specializations get visibility based
3409 : on their template unless they override it with an attribute. */;
3410 104321764 : else if (! DECL_VISIBILITY_SPECIFIED (decl))
3411 : {
3412 96131843 : if (determine_hidden_inline (decl))
3413 12 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3414 : else
3415 : {
3416 : /* Set default visibility to whatever the user supplied with
3417 : #pragma GCC visibility or a namespace visibility attribute. */
3418 96131831 : DECL_VISIBILITY (decl) = default_visibility;
3419 96131831 : DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma;
3420 : }
3421 : }
3422 : }
3423 :
3424 443291871 : if (template_decl)
3425 : {
3426 : /* If the specialization doesn't specify visibility, use the
3427 : visibility from the template. */
3428 381398566 : tree tinfo = get_template_info (template_decl);
3429 381398566 : tree args = TI_ARGS (tinfo);
3430 381398566 : tree attribs = (TREE_CODE (decl) == TYPE_DECL
3431 381398566 : ? TYPE_ATTRIBUTES (TREE_TYPE (decl))
3432 381398566 : : DECL_ATTRIBUTES (decl));
3433 381398566 : tree attr = lookup_attribute ("visibility", attribs);
3434 :
3435 381398566 : if (args != error_mark_node)
3436 : {
3437 381398566 : tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
3438 :
3439 381398566 : if (!DECL_VISIBILITY_SPECIFIED (decl))
3440 : {
3441 175492894 : if (!attr
3442 175492894 : && determine_hidden_inline (decl))
3443 33 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3444 : else
3445 : {
3446 175492861 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (pattern);
3447 350985722 : DECL_VISIBILITY_SPECIFIED (decl)
3448 175492861 : = DECL_VISIBILITY_SPECIFIED (pattern);
3449 : }
3450 : }
3451 :
3452 381398566 : if (args
3453 : /* Template argument visibility outweighs #pragma or namespace
3454 : visibility, but not an explicit attribute. */
3455 381398566 : && !attr)
3456 : {
3457 381398545 : int depth = TMPL_ARGS_DEPTH (args);
3458 381398545 : if (DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P (TI_TEMPLATE (tinfo)))
3459 : /* Class template args don't affect template friends. */;
3460 378574478 : else if (DECL_VISIBILITY_SPECIFIED (decl))
3461 : {
3462 : /* A class template member with explicit visibility
3463 : overrides the class visibility, so we need to apply
3464 : all the levels of template args directly. */
3465 : int i;
3466 660452480 : for (i = 1; i <= depth; ++i)
3467 : {
3468 336356137 : tree lev = TMPL_ARGS_LEVEL (args, i);
3469 336356137 : constrain_visibility_for_template (decl, lev);
3470 : }
3471 : }
3472 54478135 : else if (PRIMARY_TEMPLATE_P (TI_TEMPLATE (tinfo)))
3473 : /* Limit visibility based on its template arguments. */
3474 40464105 : constrain_visibility_for_template (decl, args);
3475 : }
3476 : }
3477 : }
3478 :
3479 667449625 : if (class_type)
3480 333751318 : determine_visibility_from_class (decl, class_type);
3481 :
3482 667449625 : if (decl_internal_context_p (decl))
3483 : /* Names in an anonymous namespace get internal linkage. */
3484 277502 : constrain_visibility (decl, VISIBILITY_ANON, false);
3485 667172123 : else if (TREE_CODE (decl) != TYPE_DECL)
3486 : {
3487 : /* Propagate anonymity from type to decl. */
3488 483584412 : int tvis = type_visibility (TREE_TYPE (decl));
3489 483584412 : if (tvis == VISIBILITY_ANON
3490 483584412 : || ! DECL_VISIBILITY_SPECIFIED (decl))
3491 82326537 : constrain_visibility (decl, tvis, false);
3492 : }
3493 183587711 : else if (no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/true))
3494 : /* DR 757: A type without linkage shall not be used as the type of a
3495 : variable or function with linkage, unless
3496 : o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
3497 : o the variable or function is not used (3.2 [basic.def.odr]) or is
3498 : defined in the same translation unit.
3499 :
3500 : Since non-extern "C" decls need to be defined in the same
3501 : translation unit, we can make the type internal. */
3502 723208 : constrain_visibility (decl, VISIBILITY_ANON, false);
3503 :
3504 : /* If visibility changed and DECL already has DECL_RTL, ensure
3505 : symbol flags are updated. */
3506 667449625 : if ((DECL_VISIBILITY (decl) != orig_visibility
3507 666461570 : || DECL_VISIBILITY_SPECIFIED (decl) != orig_visibility_specified)
3508 341137984 : && ((VAR_P (decl) && TREE_STATIC (decl))
3509 317223401 : || TREE_CODE (decl) == FUNCTION_DECL)
3510 986665097 : && DECL_RTL_SET_P (decl))
3511 0 : make_decl_rtl (decl);
3512 : }
3513 :
3514 : /* By default, static data members and function members receive
3515 : the visibility of their containing class. */
3516 :
3517 : static void
3518 333787210 : determine_visibility_from_class (tree decl, tree class_type)
3519 : {
3520 333787210 : if (DECL_VISIBILITY_SPECIFIED (decl))
3521 : return;
3522 :
3523 163970987 : if (determine_hidden_inline (decl))
3524 145 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3525 : else
3526 : {
3527 : /* Default to the class visibility. */
3528 163970842 : DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
3529 327941684 : DECL_VISIBILITY_SPECIFIED (decl)
3530 163970842 : = CLASSTYPE_VISIBILITY_SPECIFIED (class_type);
3531 : }
3532 :
3533 : /* Give the target a chance to override the visibility associated
3534 : with DECL. */
3535 163970987 : if (VAR_P (decl)
3536 16251702 : && TREE_PUBLIC (decl)
3537 16251690 : && (DECL_TINFO_P (decl) || DECL_VTABLE_OR_VTT_P (decl))
3538 2274339 : && !DECL_REALLY_EXTERN (decl)
3539 166245326 : && !CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
3540 75029 : targetm.cxx.determine_class_data_visibility (decl);
3541 : }
3542 :
3543 : /* Returns true iff DECL is an inline that should get hidden visibility
3544 : because of -fvisibility-inlines-hidden. */
3545 :
3546 : static bool
3547 435627363 : determine_hidden_inline (tree decl)
3548 : {
3549 435627363 : return (visibility_options.inlines_hidden
3550 : /* Don't do this for inline templates; specializations might not be
3551 : inline, and we don't want them to inherit the hidden
3552 : visibility. We'll set it here for all inline instantiations. */
3553 410 : && !processing_template_decl
3554 386 : && TREE_CODE (decl) == FUNCTION_DECL
3555 297 : && DECL_DECLARED_INLINE_P (decl)
3556 435627574 : && (! DECL_LANG_SPECIFIC (decl)
3557 211 : || ! DECL_EXPLICIT_INSTANTIATION (decl)));
3558 : }
3559 :
3560 : /* Constrain the visibility of a class TYPE based on the visibility of its
3561 : field types. Warn if any fields require lesser visibility. */
3562 :
3563 : void
3564 55502083 : constrain_class_visibility (tree type)
3565 : {
3566 55502083 : tree binfo;
3567 55502083 : tree t;
3568 55502083 : int i;
3569 :
3570 55502083 : int vis = type_visibility (type);
3571 :
3572 55502083 : if (vis == VISIBILITY_ANON
3573 55502083 : || DECL_IN_SYSTEM_HEADER (TYPE_MAIN_DECL (type)))
3574 1270753 : return;
3575 :
3576 : /* Don't warn about visibility if the class has explicit visibility. */
3577 54231330 : if (CLASSTYPE_VISIBILITY_SPECIFIED (type))
3578 53494725 : vis = VISIBILITY_INTERNAL;
3579 :
3580 428865939 : for (t = TYPE_FIELDS (type); t; t = DECL_CHAIN (t))
3581 40358346 : if (TREE_CODE (t) == FIELD_DECL && TREE_TYPE (t) != error_mark_node
3582 414992797 : && !DECL_ARTIFICIAL (t))
3583 : {
3584 14259522 : tree ftype = strip_pointer_or_array_types (TREE_TYPE (t));
3585 14259522 : int subvis = type_visibility (ftype);
3586 :
3587 14259522 : if (subvis == VISIBILITY_ANON)
3588 : {
3589 110 : if (!in_main_input_context())
3590 : {
3591 27 : tree nlt = no_linkage_check (ftype, /*relaxed_p=*/false);
3592 27 : if (nlt)
3593 : {
3594 6 : if (same_type_p (TREE_TYPE (t), nlt))
3595 6 : warning (OPT_Wsubobject_linkage, "\
3596 : %qT has a field %q#D whose type has no linkage",
3597 : type, t);
3598 : else
3599 0 : warning (OPT_Wsubobject_linkage, "\
3600 : %qT has a field %qD whose type depends on the type %qT which has no linkage",
3601 : type, t, nlt);
3602 : }
3603 21 : else if (cxx_dialect > cxx98
3604 21 : && !decl_anon_ns_mem_p (ftype))
3605 2 : warning (OPT_Wsubobject_linkage, "\
3606 : %qT has a field %q#D whose type has internal linkage",
3607 : type, t);
3608 : else // In C++98 this can only happen with unnamed namespaces.
3609 19 : warning (OPT_Wsubobject_linkage, "\
3610 : %qT has a field %q#D whose type uses the anonymous namespace",
3611 : type, t);
3612 : }
3613 : }
3614 14259412 : else if (MAYBE_CLASS_TYPE_P (ftype)
3615 5763796 : && vis < VISIBILITY_HIDDEN
3616 5763796 : && subvis >= VISIBILITY_HIDDEN)
3617 6 : warning (OPT_Wattributes, "\
3618 : %qT declared with greater visibility than the type of its field %qD",
3619 : type, t);
3620 : }
3621 :
3622 54231330 : binfo = TYPE_BINFO (type);
3623 80006122 : for (i = 0; BINFO_BASE_ITERATE (binfo, i, t); ++i)
3624 : {
3625 25774792 : tree btype = BINFO_TYPE (t);
3626 25774792 : int subvis = type_visibility (btype);
3627 :
3628 25774792 : if (subvis == VISIBILITY_ANON)
3629 : {
3630 32 : if (!in_main_input_context())
3631 : {
3632 18 : tree nlt = no_linkage_check (btype, /*relaxed_p=*/false);
3633 18 : if (nlt)
3634 : {
3635 6 : if (same_type_p (btype, nlt))
3636 6 : warning (OPT_Wsubobject_linkage, "\
3637 : %qT has a base %qT which has no linkage",
3638 : type, btype);
3639 : else
3640 0 : warning (OPT_Wsubobject_linkage, "\
3641 : %qT has a base %qT which depends on the type %qT which has no linkage",
3642 : type, btype, nlt);
3643 : }
3644 12 : else if (cxx_dialect > cxx98
3645 12 : && !decl_anon_ns_mem_p (btype))
3646 3 : warning (OPT_Wsubobject_linkage, "\
3647 : %qT has a base %qT which has internal linkage",
3648 : type, btype);
3649 : else // In C++98 this can only happen with unnamed namespaces.
3650 9 : warning (OPT_Wsubobject_linkage, "\
3651 : %qT has a base %qT which uses the anonymous namespace",
3652 : type, btype);
3653 : }
3654 : }
3655 25774760 : else if (vis < VISIBILITY_HIDDEN
3656 25774760 : && subvis >= VISIBILITY_HIDDEN)
3657 6 : warning (OPT_Wattributes, "\
3658 : %qT declared with greater visibility than its base %qT",
3659 6 : type, TREE_TYPE (t));
3660 : }
3661 : }
3662 :
3663 : /* Functions for adjusting the visibility of a tagged type and its nested
3664 : types and declarations when it gets a name for linkage purposes from a
3665 : typedef. */
3666 : // FIXME: It is now a DR for such a class type to contain anything
3667 : // other than C. So at minium most of this can probably be deleted.
3668 :
3669 : /* First reset the visibility of all the types. */
3670 :
3671 : static void
3672 1055107 : reset_type_linkage_1 (tree type)
3673 : {
3674 1055107 : set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
3675 1055107 : if (CLASS_TYPE_P (type))
3676 3557710 : for (tree member = TYPE_FIELDS (type); member; member = DECL_CHAIN (member))
3677 2829459 : if (DECL_IMPLICIT_TYPEDEF_P (member))
3678 229129 : reset_type_linkage_1 (TREE_TYPE (member));
3679 1055107 : }
3680 :
3681 : /* Then reset the visibility of any static data members or member
3682 : functions that use those types. */
3683 :
3684 : static void
3685 103 : reset_decl_linkage (tree decl)
3686 : {
3687 103 : if (TREE_PUBLIC (decl))
3688 : return;
3689 103 : if (DECL_CLONED_FUNCTION_P (decl))
3690 : return;
3691 99 : TREE_PUBLIC (decl) = true;
3692 99 : DECL_INTERFACE_KNOWN (decl) = false;
3693 99 : determine_visibility (decl);
3694 99 : tentative_decl_linkage (decl);
3695 : }
3696 :
3697 : void
3698 825978 : reset_type_linkage (tree type)
3699 : {
3700 825978 : reset_type_linkage_1 (type);
3701 825978 : if (CLASS_TYPE_P (type))
3702 : {
3703 499134 : if (tree vt = CLASSTYPE_VTABLES (type))
3704 : {
3705 15 : tree name = mangle_vtbl_for_type (type);
3706 15 : DECL_NAME (vt) = name;
3707 15 : SET_DECL_ASSEMBLER_NAME (vt, name);
3708 15 : reset_decl_linkage (vt);
3709 : }
3710 499134 : if (!ANON_AGGR_TYPE_P (type))
3711 498985 : if (tree ti = CLASSTYPE_TYPEINFO_VAR (type))
3712 : {
3713 12 : tree name = mangle_typeinfo_for_type (type);
3714 12 : DECL_NAME (ti) = name;
3715 12 : SET_DECL_ASSEMBLER_NAME (ti, name);
3716 12 : TREE_TYPE (name) = type;
3717 12 : reset_decl_linkage (ti);
3718 : }
3719 2350999 : for (tree m = TYPE_FIELDS (type); m; m = DECL_CHAIN (m))
3720 : {
3721 1851865 : tree mem = STRIP_TEMPLATE (m);
3722 1851865 : if (TREE_CODE (mem) == VAR_DECL || TREE_CODE (mem) == FUNCTION_DECL)
3723 76 : reset_decl_linkage (mem);
3724 1851789 : else if (DECL_IMPLICIT_TYPEDEF_P (mem))
3725 120225 : reset_type_linkage (TREE_TYPE (mem));
3726 : }
3727 : }
3728 825978 : }
3729 :
3730 : /* Set up our initial idea of what the linkage of DECL should be. */
3731 :
3732 : void
3733 29891959 : tentative_decl_linkage (tree decl)
3734 : {
3735 29891959 : if (DECL_INTERFACE_KNOWN (decl))
3736 : /* We've already made a decision as to how this function will
3737 : be handled. */;
3738 29890937 : else if (vague_linkage_p (decl))
3739 : {
3740 29890368 : if (TREE_CODE (decl) == FUNCTION_DECL
3741 29890368 : && decl_defined_p (decl))
3742 : {
3743 29868905 : DECL_EXTERNAL (decl) = 1;
3744 29868905 : DECL_NOT_REALLY_EXTERN (decl) = 1;
3745 29868905 : note_vague_linkage_fn (decl);
3746 : /* A non-template inline function with external linkage will
3747 : always be COMDAT. As we must eventually determine the
3748 : linkage of all functions, and as that causes writes to
3749 : the data mapped in from the PCH file, it's advantageous
3750 : to mark the functions at this point. */
3751 29868905 : if (DECL_DECLARED_INLINE_P (decl))
3752 : {
3753 29866420 : if (!DECL_IMPLICIT_INSTANTIATION (decl)
3754 29866420 : || DECL_DEFAULTED_FN (decl))
3755 : {
3756 : /* This function must have external linkage, as
3757 : otherwise DECL_INTERFACE_KNOWN would have been
3758 : set. */
3759 24342514 : gcc_assert (TREE_PUBLIC (decl));
3760 24342514 : comdat_linkage (decl);
3761 24342514 : DECL_INTERFACE_KNOWN (decl) = 1;
3762 : }
3763 5523906 : else if (DECL_MAYBE_IN_CHARGE_CDTOR_P (decl))
3764 : /* For implicit instantiations of cdtors try to make
3765 : it comdat, so that maybe_clone_body can use aliases.
3766 : See PR113208. */
3767 667949 : maybe_make_one_only (decl);
3768 : }
3769 : }
3770 21463 : else if (VAR_P (decl))
3771 21461 : maybe_commonize_var (decl);
3772 : }
3773 29891959 : }
3774 :
3775 : /* For a polymorphic class type CTYPE, whether its vtables are emitted in a
3776 : unique object as per the ABI. */
3777 :
3778 : static bool
3779 2845 : vtables_uniquely_emitted (tree ctype)
3780 : {
3781 : /* If the class is templated, the tables are emitted in every object that
3782 : references any of them. */
3783 2845 : if (CLASSTYPE_USE_TEMPLATE (ctype))
3784 : return false;
3785 :
3786 : /* Otherwise, if the class is attached to a module, the tables are uniquely
3787 : emitted in the object for the module unit in which it is defined. */
3788 2219 : tree cdecl = TYPE_NAME (ctype);
3789 2354 : if (DECL_LANG_SPECIFIC (cdecl) && DECL_MODULE_ATTACH_P (cdecl))
3790 : return true;
3791 :
3792 : /* Otherwise, if the class has a key function, the tables are emitted in the
3793 : object for the TU containing the definition of the key function. This is
3794 : unique if the key function is not inline. */
3795 2087 : tree key_method = CLASSTYPE_KEY_METHOD (ctype);
3796 4154 : if (key_method && !DECL_NONGNU_INLINE_P (key_method))
3797 2047 : return true;
3798 :
3799 : /* Otherwise, the tables are emitted in every object that references
3800 : any of them. */
3801 : return false;
3802 : }
3803 :
3804 : /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
3805 : for DECL has not already been determined, do so now by setting
3806 : DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
3807 : function is called entities with vague linkage whose definitions
3808 : are available must have TREE_PUBLIC set.
3809 :
3810 : If this function decides to place DECL in COMDAT, it will set
3811 : appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
3812 : the caller to decide whether or not to clear DECL_EXTERNAL. Some
3813 : callers defer that decision until it is clear that DECL is actually
3814 : required. */
3815 :
3816 : void
3817 254026346 : import_export_decl (tree decl)
3818 : {
3819 254026346 : bool comdat_p;
3820 254026346 : bool import_p;
3821 254026346 : tree class_type = NULL_TREE;
3822 :
3823 254026346 : if (DECL_INTERFACE_KNOWN (decl))
3824 : return;
3825 :
3826 : /* We cannot determine what linkage to give to an entity with vague
3827 : linkage until the end of the file. For example, a virtual table
3828 : for a class will be defined if and only if the key method is
3829 : defined in this translation unit. */
3830 50651775 : gcc_assert (at_eof);
3831 : /* Object file linkage for explicit instantiations is handled in
3832 : mark_decl_instantiated. For static variables in functions with
3833 : vague linkage, maybe_commonize_var is used.
3834 :
3835 : Therefore, the only declarations that should be provided to this
3836 : function are those with external linkage that are:
3837 :
3838 : * implicit instantiations of function templates
3839 :
3840 : * inline functions
3841 :
3842 : * inline variables
3843 :
3844 : * implicit instantiations of static data members of class
3845 : templates
3846 :
3847 : * virtual tables
3848 :
3849 : * typeinfo objects
3850 :
3851 : Furthermore, all entities that reach this point must have a
3852 : definition available in this translation unit.
3853 :
3854 : The following assertions check these conditions. */
3855 50651775 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
3856 : /* Any code that creates entities with TREE_PUBLIC cleared should
3857 : also set DECL_INTERFACE_KNOWN. */
3858 50651775 : gcc_assert (TREE_PUBLIC (decl));
3859 50651775 : if (TREE_CODE (decl) == FUNCTION_DECL)
3860 27911337 : gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
3861 : || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
3862 : || DECL_DECLARED_INLINE_P (decl));
3863 : else
3864 22740438 : gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
3865 : || DECL_INLINE_VAR_P (decl)
3866 : || DECL_VTABLE_OR_VTT_P (decl)
3867 : || DECL_TINFO_P (decl));
3868 : /* Check that a definition of DECL is available in this translation
3869 : unit. */
3870 50651775 : gcc_assert (!DECL_REALLY_EXTERN (decl));
3871 :
3872 : /* Assume that DECL will not have COMDAT linkage. */
3873 50651775 : comdat_p = false;
3874 : /* Assume that DECL will not be imported into this translation
3875 : unit. */
3876 50651775 : import_p = false;
3877 :
3878 50651775 : if (VAR_P (decl) && DECL_VTABLE_OR_VTT_P (decl))
3879 : {
3880 1663303 : class_type = DECL_CONTEXT (decl);
3881 1663303 : import_export_class (class_type);
3882 1663303 : if (CLASSTYPE_INTERFACE_KNOWN (class_type)
3883 1663303 : && CLASSTYPE_INTERFACE_ONLY (class_type))
3884 : import_p = true;
3885 591375 : else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
3886 591375 : && !vtables_uniquely_emitted (class_type))
3887 : /* The ABI historically required that all virtual tables be
3888 : emitted with COMDAT linkage. However, on systems where
3889 : COMDAT symbols don't show up in the table of contents for
3890 : a static archive, or on systems without weak symbols (where
3891 : we approximate COMDAT linkage by using internal linkage),
3892 : the linker will report errors about undefined symbols because
3893 : it will not see the virtual table definition. Therefore,
3894 : in the case that we know that the virtual table will be
3895 : emitted in only one translation unit, we make the virtual
3896 : table an ordinary definition with external linkage. */
3897 3 : DECL_EXTERNAL (decl) = 0;
3898 591372 : else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
3899 : {
3900 : /* CLASS_TYPE is being exported from this translation unit,
3901 : so DECL should be defined here. */
3902 2842 : if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
3903 : /* If a class is declared in a header with the "extern
3904 : template" extension, then it will not be instantiated,
3905 : even in translation units that would normally require
3906 : it. Often such classes are explicitly instantiated in
3907 : one translation unit. Therefore, the explicit
3908 : instantiation must be made visible to other translation
3909 : units. */
3910 0 : DECL_EXTERNAL (decl) = 0;
3911 : else
3912 : {
3913 : /* The generic C++ ABI used to say that class data is always
3914 : COMDAT, even if emitted in a unique object. This is no
3915 : longer true, but for now we continue to do so for
3916 : compatibility with programs that are not strictly valid.
3917 : However, some variants (e.g., the ARM EABI) explicitly say
3918 : that class data only has COMDAT linkage if the class data
3919 : might be emitted in more than one translation unit.
3920 : When the key method can be inline and is inline, we still
3921 : have to arrange for comdat even though
3922 : class_data_always_comdat is false. */
3923 2842 : if (!vtables_uniquely_emitted (class_type)
3924 2842 : || targetm.cxx.class_data_always_comdat ())
3925 : {
3926 : /* The ABI requires COMDAT linkage. Normally, we
3927 : only emit COMDAT things when they are needed;
3928 : make sure that we realize that this entity is
3929 : indeed needed. */
3930 2842 : comdat_p = true;
3931 2842 : mark_needed (decl);
3932 : }
3933 : }
3934 : }
3935 588530 : else if (!flag_implicit_templates
3936 588530 : && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
3937 : import_p = true;
3938 : else
3939 : comdat_p = true;
3940 : }
3941 48988472 : else if (VAR_P (decl) && DECL_TINFO_P (decl))
3942 : {
3943 2350193 : tree type = TREE_TYPE (DECL_NAME (decl));
3944 2350193 : if (CLASS_TYPE_P (type))
3945 : {
3946 2347524 : class_type = type;
3947 2347524 : import_export_class (type);
3948 2347524 : if (CLASSTYPE_INTERFACE_KNOWN (type)
3949 1217107 : && TYPE_CONTAINS_VPTR_P (type)
3950 1217029 : && CLASSTYPE_INTERFACE_ONLY (type)
3951 : /* If -fno-rtti was specified, then we cannot be sure
3952 : that RTTI information will be emitted with the
3953 : virtual table of the class, so we must emit it
3954 : wherever it is used. */
3955 3560651 : && flag_rtti)
3956 : import_p = true;
3957 : else
3958 : {
3959 1134443 : if (CLASSTYPE_INTERFACE_KNOWN (type)
3960 1134443 : && !CLASSTYPE_INTERFACE_ONLY (type))
3961 : {
3962 3932 : comdat_p = (targetm.cxx.class_data_always_comdat ()
3963 3932 : || !vtables_uniquely_emitted (class_type));
3964 3932 : mark_needed (decl);
3965 3932 : if (!flag_weak)
3966 : {
3967 0 : comdat_p = false;
3968 0 : DECL_EXTERNAL (decl) = 0;
3969 : }
3970 : }
3971 : else
3972 : comdat_p = true;
3973 : }
3974 : }
3975 : else
3976 : comdat_p = true;
3977 : }
3978 46638279 : else if (DECL_TEMPLOID_INSTANTIATION (decl))
3979 : {
3980 : /* DECL is an implicit instantiation of a function or static
3981 : data member. */
3982 46325945 : if (flag_implicit_templates
3983 46325945 : || (flag_implicit_inline_templates
3984 21244 : && TREE_CODE (decl) == FUNCTION_DECL
3985 17015 : && DECL_DECLARED_INLINE_P (decl)))
3986 : comdat_p = true;
3987 : else
3988 : /* If we are not implicitly generating templates, then mark
3989 : this entity as undefined in this translation unit. */
3990 : import_p = true;
3991 : }
3992 312334 : else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_FUNCTION_MEMBER_P (decl))
3993 : {
3994 303862 : if (!DECL_NONGNU_INLINE_P (decl))
3995 : {
3996 0 : tree ctype = DECL_CONTEXT (decl);
3997 0 : import_export_class (ctype);
3998 0 : if (CLASSTYPE_INTERFACE_KNOWN (ctype))
3999 : {
4000 0 : DECL_NOT_REALLY_EXTERN (decl)
4001 0 : = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
4002 0 : || (DECL_DECLARED_INLINE_P (decl)
4003 0 : && ! flag_implement_inlines
4004 0 : && !DECL_VINDEX (decl)));
4005 :
4006 0 : if (!DECL_NOT_REALLY_EXTERN (decl))
4007 0 : DECL_EXTERNAL (decl) = 1;
4008 :
4009 : /* Always make artificials weak. */
4010 0 : if (DECL_ARTIFICIAL (decl) && flag_weak)
4011 : comdat_p = true;
4012 : else
4013 0 : maybe_make_one_only (decl);
4014 : }
4015 : }
4016 : else
4017 : comdat_p = true;
4018 : }
4019 : else
4020 : comdat_p = true;
4021 :
4022 2845 : if (import_p)
4023 : {
4024 : /* If we are importing DECL into this translation unit, mark is
4025 : an undefined here. */
4026 2292617 : DECL_EXTERNAL (decl) = 1;
4027 2292617 : DECL_NOT_REALLY_EXTERN (decl) = 0;
4028 : }
4029 48359158 : else if (comdat_p)
4030 : {
4031 : /* If we decided to put DECL in COMDAT, mark it accordingly at
4032 : this point. */
4033 48359155 : comdat_linkage (decl);
4034 : }
4035 :
4036 50651775 : DECL_INTERFACE_KNOWN (decl) = 1;
4037 : }
4038 :
4039 : /* Return an expression that performs the destruction of DECL, which
4040 : must be a VAR_DECL whose type has a non-trivial destructor, or is
4041 : an array whose (innermost) elements have a non-trivial destructor. */
4042 :
4043 : tree
4044 1256 : build_cleanup (tree decl)
4045 : {
4046 1256 : tree clean = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
4047 1256 : gcc_assert (clean != NULL_TREE);
4048 1256 : return clean;
4049 : }
4050 :
4051 : /* GUARD is a helper variable for DECL; make them have the same linkage and
4052 : visibility. */
4053 :
4054 : void
4055 136912 : copy_linkage (tree guard, tree decl)
4056 : {
4057 136912 : TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
4058 136912 : TREE_STATIC (guard) = TREE_STATIC (decl);
4059 136912 : DECL_COMMON (guard) = DECL_COMMON (decl);
4060 136912 : DECL_COMDAT (guard) = DECL_COMDAT (decl);
4061 136912 : if (TREE_STATIC (guard))
4062 : {
4063 6222 : CP_DECL_THREAD_LOCAL_P (guard) = CP_DECL_THREAD_LOCAL_P (decl);
4064 6222 : set_decl_tls_model (guard, DECL_TLS_MODEL (decl));
4065 6222 : if (DECL_ONE_ONLY (decl))
4066 4319 : make_decl_one_only (guard, cxx_comdat_group (guard));
4067 6222 : if (TREE_PUBLIC (decl))
4068 5052 : DECL_WEAK (guard) = DECL_WEAK (decl);
4069 : /* Also check vague_linkage_p, as DECL_WEAK and DECL_ONE_ONLY might not
4070 : be set until import_export_decl at EOF. */
4071 6222 : if (vague_linkage_p (decl))
4072 4337 : comdat_linkage (guard);
4073 6222 : DECL_VISIBILITY (guard) = DECL_VISIBILITY (decl);
4074 6222 : DECL_VISIBILITY_SPECIFIED (guard) = DECL_VISIBILITY_SPECIFIED (decl);
4075 6222 : if (!TREE_PUBLIC (decl))
4076 : {
4077 1170 : gcc_checking_assert (DECL_INTERFACE_KNOWN (decl));
4078 1170 : DECL_INTERFACE_KNOWN (guard) = 1;
4079 1170 : if (DECL_LANG_SPECIFIC (decl) && DECL_LANG_SPECIFIC (guard))
4080 244 : DECL_NOT_REALLY_EXTERN (guard) = DECL_NOT_REALLY_EXTERN (decl);
4081 : }
4082 : }
4083 136912 : }
4084 :
4085 : /* Returns the initialization guard variable for the variable DECL,
4086 : which has static storage duration. */
4087 :
4088 : tree
4089 4661 : get_guard (tree decl)
4090 : {
4091 4661 : tree sname = mangle_guard_variable (decl);
4092 4661 : tree guard = get_global_binding (sname);
4093 4661 : if (! guard)
4094 : {
4095 4661 : tree guard_type;
4096 :
4097 : /* We use a type that is big enough to contain a mutex as well
4098 : as an integer counter. */
4099 4661 : guard_type = targetm.cxx.guard_type ();
4100 4661 : guard = build_decl (DECL_SOURCE_LOCATION (decl),
4101 : VAR_DECL, sname, guard_type);
4102 :
4103 : /* The guard should have the same linkage as what it guards. */
4104 4661 : copy_linkage (guard, decl);
4105 :
4106 4661 : DECL_ARTIFICIAL (guard) = 1;
4107 4661 : DECL_IGNORED_P (guard) = 1;
4108 4661 : TREE_USED (guard) = 1;
4109 4661 : pushdecl_top_level_and_finish (guard, NULL_TREE);
4110 : }
4111 4661 : return guard;
4112 : }
4113 :
4114 : /* Returns true if accessing the GUARD atomic is expensive,
4115 : i.e. involves a call to __sync_synchronize or similar.
4116 : In this case let __cxa_guard_acquire handle the atomics. */
4117 :
4118 : static bool
4119 3640 : is_atomic_expensive_p (machine_mode mode)
4120 : {
4121 3640 : if (!flag_inline_atomics)
4122 : return true;
4123 :
4124 3640 : if (!can_compare_and_swap_p (mode, false) || !can_atomic_load_p (mode))
4125 0 : return true;
4126 :
4127 : return false;
4128 : }
4129 :
4130 : /* Return an atomic load of src with the appropriate memory model. */
4131 :
4132 : static tree
4133 3640 : build_atomic_load_type (tree src, HOST_WIDE_INT model, tree type)
4134 : {
4135 3640 : tree ptr_type = build_pointer_type (type);
4136 3640 : tree mem_model = build_int_cst (integer_type_node, model);
4137 3640 : tree t, addr, val;
4138 3640 : unsigned int size;
4139 3640 : int fncode;
4140 :
4141 3640 : size = tree_to_uhwi (TYPE_SIZE_UNIT (type));
4142 :
4143 3640 : fncode = BUILT_IN_ATOMIC_LOAD_N + exact_log2 (size) + 1;
4144 3640 : t = builtin_decl_implicit ((enum built_in_function) fncode);
4145 :
4146 3640 : addr = build1 (ADDR_EXPR, ptr_type, src);
4147 3640 : val = build_call_expr (t, 2, addr, mem_model);
4148 3640 : return val;
4149 : }
4150 :
4151 : /* Return those bits of the GUARD variable that should be set when the
4152 : guarded entity is actually initialized. */
4153 :
4154 : static tree
4155 2042 : get_guard_bits (tree guard)
4156 : {
4157 2042 : if (!targetm.cxx.guard_mask_bit ())
4158 : {
4159 : /* We only set the first byte of the guard, in order to leave room
4160 : for a mutex in the high-order bits. */
4161 2042 : guard = build1 (ADDR_EXPR,
4162 2042 : build_pointer_type (TREE_TYPE (guard)),
4163 : guard);
4164 2042 : guard = build1 (NOP_EXPR,
4165 : build_pointer_type (char_type_node),
4166 : guard);
4167 2042 : guard = build1 (INDIRECT_REF, char_type_node, guard);
4168 : }
4169 :
4170 2042 : return guard;
4171 : }
4172 :
4173 : /* Return an expression which determines whether or not the GUARD
4174 : variable has already been initialized. */
4175 :
4176 : tree
4177 4661 : get_guard_cond (tree guard, bool thread_safe)
4178 : {
4179 4661 : tree guard_value;
4180 :
4181 4661 : if (!thread_safe)
4182 1021 : guard = get_guard_bits (guard);
4183 : else
4184 : {
4185 3640 : tree type = targetm.cxx.guard_mask_bit ()
4186 3640 : ? TREE_TYPE (guard) : char_type_node;
4187 :
4188 3640 : if (is_atomic_expensive_p (TYPE_MODE (type)))
4189 0 : guard = integer_zero_node;
4190 : else
4191 3640 : guard = build_atomic_load_type (guard, MEMMODEL_ACQUIRE, type);
4192 : }
4193 :
4194 : /* Mask off all but the low bit. */
4195 4661 : if (targetm.cxx.guard_mask_bit ())
4196 : {
4197 0 : guard_value = integer_one_node;
4198 0 : if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
4199 0 : guard_value = fold_convert (TREE_TYPE (guard), guard_value);
4200 0 : guard = cp_build_binary_op (input_location,
4201 : BIT_AND_EXPR, guard, guard_value,
4202 : tf_warning_or_error);
4203 : }
4204 :
4205 4661 : guard_value = integer_zero_node;
4206 4661 : if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
4207 4661 : guard_value = fold_convert (TREE_TYPE (guard), guard_value);
4208 4661 : return cp_build_binary_op (input_location,
4209 : EQ_EXPR, guard, guard_value,
4210 4661 : tf_warning_or_error);
4211 : }
4212 :
4213 : /* Return an expression which sets the GUARD variable, indicating that
4214 : the variable being guarded has been initialized. */
4215 :
4216 : tree
4217 1021 : set_guard (tree guard)
4218 : {
4219 1021 : tree guard_init;
4220 :
4221 : /* Set the GUARD to one. */
4222 1021 : guard = get_guard_bits (guard);
4223 1021 : guard_init = integer_one_node;
4224 1021 : if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
4225 1021 : guard_init = fold_convert (TREE_TYPE (guard), guard_init);
4226 1021 : return cp_build_modify_expr (input_location, guard, NOP_EXPR, guard_init,
4227 1021 : tf_warning_or_error);
4228 : }
4229 :
4230 : /* Returns true iff we can tell that VAR does not have a dynamic
4231 : initializer. */
4232 :
4233 : static bool
4234 2602 : var_defined_without_dynamic_init (tree var)
4235 : {
4236 : /* constinit vars are guaranteed to not have dynamic initializer,
4237 : but still registering the destructor counts as dynamic initialization. */
4238 2602 : if (DECL_DECLARED_CONSTINIT_P (var)
4239 24 : && COMPLETE_TYPE_P (TREE_TYPE (var))
4240 2620 : && !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (var)))
4241 : return true;
4242 : /* If it's defined in another TU, we can't tell. */
4243 2590 : if (DECL_EXTERNAL (var))
4244 : return false;
4245 : /* If it has a non-trivial destructor, registering the destructor
4246 : counts as dynamic initialization. */
4247 2343 : if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (var)))
4248 : return false;
4249 : /* If it's in this TU, its initializer has been processed, unless
4250 : it's a case of self-initialization, then DECL_INITIALIZED_P is
4251 : false while the initializer is handled by finish_id_expression. */
4252 2162 : if (!DECL_INITIALIZED_P (var))
4253 : return false;
4254 : /* If it has no initializer or a constant one, it's not dynamic. */
4255 2156 : return (!DECL_NONTRIVIALLY_INITIALIZED_P (var)
4256 2156 : || DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (var));
4257 : }
4258 :
4259 : /* Returns true iff VAR is a variable that needs uses to be
4260 : wrapped for possible dynamic initialization. */
4261 :
4262 : bool
4263 74813 : var_needs_tls_wrapper (tree var)
4264 : {
4265 74813 : return (!error_operand_p (var)
4266 74810 : && CP_DECL_THREAD_LOCAL_P (var)
4267 74810 : && !DECL_GNU_TLS_P (var)
4268 2740 : && !DECL_FUNCTION_SCOPE_P (var)
4269 77415 : && !var_defined_without_dynamic_init (var));
4270 : }
4271 :
4272 : /* Get the FUNCTION_DECL for the shared TLS init function for this
4273 : translation unit. */
4274 :
4275 : static tree
4276 195 : get_local_tls_init_fn (location_t loc)
4277 : {
4278 195 : tree sname = get_identifier ("__tls_init");
4279 195 : tree fn = get_global_binding (sname);
4280 195 : if (!fn)
4281 : {
4282 123 : fn = build_lang_decl_loc (loc, FUNCTION_DECL, sname,
4283 : build_function_type (void_type_node,
4284 : void_list_node));
4285 123 : SET_DECL_LANGUAGE (fn, lang_c);
4286 123 : TREE_PUBLIC (fn) = false;
4287 123 : DECL_ARTIFICIAL (fn) = true;
4288 123 : mark_used (fn);
4289 123 : set_global_binding (fn);
4290 : }
4291 195 : return fn;
4292 : }
4293 :
4294 : /* Get a FUNCTION_DECL for the init function for the thread_local
4295 : variable VAR. The init function will be an alias to the function
4296 : that initializes all the non-local TLS variables in the translation
4297 : unit. The init function is only used by the wrapper function. */
4298 :
4299 : static tree
4300 1294 : get_tls_init_fn (tree var)
4301 : {
4302 : /* Only C++11 TLS vars need this init fn. */
4303 1294 : if (!var_needs_tls_wrapper (var))
4304 : return NULL_TREE;
4305 :
4306 : /* If -fno-extern-tls-init, assume that we don't need to call
4307 : a tls init function for a variable defined in another TU. */
4308 1275 : if (!flag_extern_tls_init && DECL_EXTERNAL (var))
4309 : return NULL_TREE;
4310 :
4311 : /* If the variable is internal, or if we can't generate aliases,
4312 : call the local init function directly. */
4313 1274 : if (!TREE_PUBLIC (var) || !TARGET_SUPPORTS_ALIASES)
4314 72 : return get_local_tls_init_fn (DECL_SOURCE_LOCATION (var));
4315 :
4316 1202 : tree sname = mangle_tls_init_fn (var);
4317 1202 : tree fn = get_global_binding (sname);
4318 1202 : if (!fn)
4319 : {
4320 777 : fn = build_lang_decl (FUNCTION_DECL, sname,
4321 : build_function_type (void_type_node,
4322 : void_list_node));
4323 777 : SET_DECL_LANGUAGE (fn, lang_c);
4324 777 : TREE_PUBLIC (fn) = TREE_PUBLIC (var);
4325 777 : DECL_ARTIFICIAL (fn) = true;
4326 777 : DECL_CONTEXT (fn) = FROB_CONTEXT (global_namespace);
4327 777 : DECL_COMDAT (fn) = DECL_COMDAT (var);
4328 777 : DECL_EXTERNAL (fn) = DECL_EXTERNAL (var);
4329 777 : if (DECL_ONE_ONLY (var))
4330 3 : make_decl_one_only (fn, cxx_comdat_group (fn));
4331 777 : if (TREE_PUBLIC (var))
4332 : {
4333 777 : tree obtype = strip_array_types (non_reference (TREE_TYPE (var)));
4334 : /* If the variable is defined somewhere else and might have static
4335 : initialization, make the init function a weak reference. */
4336 777 : if ((!TYPE_NEEDS_CONSTRUCTING (obtype)
4337 615 : || TYPE_HAS_CONSTEXPR_CTOR (obtype)
4338 597 : || TYPE_HAS_TRIVIAL_DFLT (obtype))
4339 180 : && TYPE_HAS_TRIVIAL_DESTRUCTOR (obtype)
4340 939 : && DECL_EXTERNAL (var))
4341 51 : declare_weak (fn);
4342 : else
4343 726 : DECL_WEAK (fn) = DECL_WEAK (var);
4344 : }
4345 777 : DECL_VISIBILITY (fn) = DECL_VISIBILITY (var);
4346 777 : DECL_VISIBILITY_SPECIFIED (fn) = DECL_VISIBILITY_SPECIFIED (var);
4347 777 : DECL_DLLIMPORT_P (fn) = DECL_DLLIMPORT_P (var);
4348 777 : DECL_IGNORED_P (fn) = 1;
4349 777 : mark_used (fn);
4350 :
4351 777 : DECL_BEFRIENDING_CLASSES (fn) = var;
4352 :
4353 777 : set_global_binding (fn);
4354 : }
4355 : return fn;
4356 : }
4357 :
4358 : /* Get a FUNCTION_DECL for the init wrapper function for the thread_local
4359 : variable VAR. The wrapper function calls the init function (if any) for
4360 : VAR and then returns a reference to VAR. The wrapper function is used
4361 : in place of VAR everywhere VAR is mentioned. */
4362 :
4363 : static tree
4364 73504 : get_tls_wrapper_fn (tree var)
4365 : {
4366 : /* Only C++11 TLS vars need this wrapper fn. */
4367 73504 : if (!var_needs_tls_wrapper (var))
4368 : return NULL_TREE;
4369 :
4370 749 : tree sname = mangle_tls_wrapper_fn (var);
4371 749 : tree fn = get_global_binding (sname);
4372 749 : if (!fn)
4373 : {
4374 : /* A named rvalue reference is an lvalue, so the wrapper should
4375 : always return an lvalue reference. */
4376 586 : tree type = non_reference (TREE_TYPE (var));
4377 586 : type = build_reference_type (type);
4378 586 : tree fntype = build_function_type (type, void_list_node);
4379 :
4380 586 : fn = build_lang_decl_loc (DECL_SOURCE_LOCATION (var),
4381 : FUNCTION_DECL, sname, fntype);
4382 586 : SET_DECL_LANGUAGE (fn, lang_c);
4383 586 : TREE_PUBLIC (fn) = TREE_PUBLIC (var);
4384 586 : DECL_ARTIFICIAL (fn) = true;
4385 586 : DECL_IGNORED_P (fn) = 1;
4386 586 : DECL_CONTEXT (fn) = FROB_CONTEXT (global_namespace);
4387 : /* The wrapper is inline and emitted everywhere var is used. */
4388 586 : DECL_DECLARED_INLINE_P (fn) = true;
4389 586 : if (TREE_PUBLIC (var))
4390 : {
4391 514 : comdat_linkage (fn);
4392 : #ifdef HAVE_GAS_HIDDEN
4393 : /* Make the wrapper bind locally; there's no reason to share
4394 : the wrapper between multiple shared objects. */
4395 514 : DECL_VISIBILITY (fn) = VISIBILITY_INTERNAL;
4396 514 : DECL_VISIBILITY_SPECIFIED (fn) = true;
4397 : #endif
4398 : }
4399 586 : if (!TREE_PUBLIC (fn))
4400 72 : DECL_INTERFACE_KNOWN (fn) = true;
4401 586 : mark_used (fn);
4402 586 : note_vague_linkage_fn (fn);
4403 :
4404 : #if 0
4405 : /* We want CSE to commonize calls to the wrapper, but marking it as
4406 : pure is unsafe since it has side-effects. I guess we need a new
4407 : ECF flag even weaker than ECF_PURE. FIXME! */
4408 : DECL_PURE_P (fn) = true;
4409 : #endif
4410 :
4411 586 : DECL_BEFRIENDING_CLASSES (fn) = var;
4412 :
4413 586 : set_global_binding (fn);
4414 : }
4415 : return fn;
4416 : }
4417 :
4418 : /* If EXPR is a thread_local variable that should be wrapped by init
4419 : wrapper function, return a call to that function, otherwise return
4420 : NULL. */
4421 :
4422 : tree
4423 1025852985 : maybe_get_tls_wrapper_call (tree expr)
4424 : {
4425 1025852985 : if (VAR_P (expr)
4426 374885510 : && !processing_template_decl
4427 186593490 : && !cp_unevaluated_operand
4428 1209558709 : && CP_DECL_THREAD_LOCAL_P (expr))
4429 73504 : if (tree wrap = get_tls_wrapper_fn (expr))
4430 749 : return build_cxx_call (wrap, 0, NULL, tf_warning_or_error);
4431 : return NULL;
4432 : }
4433 :
4434 : /* At EOF, generate the definition for the TLS wrapper function FN:
4435 :
4436 : T& var_wrapper() {
4437 : if (init_fn) init_fn();
4438 : return var;
4439 : } */
4440 :
4441 : static void
4442 586 : generate_tls_wrapper (tree fn)
4443 : {
4444 586 : tree var = DECL_BEFRIENDING_CLASSES (fn);
4445 :
4446 586 : start_preparsed_function (fn, NULL_TREE, SF_DEFAULT | SF_PRE_PARSED);
4447 586 : tree body = begin_function_body ();
4448 : /* Only call the init fn if there might be one. */
4449 586 : if (tree init_fn = get_tls_init_fn (var))
4450 : {
4451 566 : tree if_stmt = NULL_TREE;
4452 : /* If init_fn is a weakref, make sure it exists before calling. */
4453 566 : if (lookup_attribute ("weak", DECL_ATTRIBUTES (init_fn)))
4454 : {
4455 51 : if_stmt = begin_if_stmt ();
4456 51 : tree addr = cp_build_addr_expr (init_fn, tf_warning_or_error);
4457 51 : tree cond = cp_build_binary_op (DECL_SOURCE_LOCATION (var),
4458 : NE_EXPR, addr, nullptr_node,
4459 : tf_warning_or_error);
4460 51 : finish_if_stmt_cond (cond, if_stmt);
4461 : }
4462 566 : finish_expr_stmt (build_cxx_call
4463 : (init_fn, 0, NULL, tf_warning_or_error));
4464 566 : if (if_stmt)
4465 : {
4466 51 : finish_then_clause (if_stmt);
4467 51 : finish_if_stmt (if_stmt);
4468 : }
4469 : }
4470 : else
4471 : /* If there's no initialization, the wrapper is a constant function. */
4472 20 : TREE_READONLY (fn) = true;
4473 586 : finish_return_stmt (convert_from_reference (var));
4474 586 : finish_function_body (body);
4475 586 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
4476 586 : }
4477 :
4478 : /* Start a global constructor or destructor function. */
4479 :
4480 : static tree
4481 7337 : start_objects (bool initp, unsigned priority, bool has_body,
4482 : bool omp_target = false)
4483 : {
4484 7337 : bool default_init = initp && priority == DEFAULT_INIT_PRIORITY;
4485 : /* FIXME: We may eventually want to treat OpenMP offload initializers
4486 : in modules specially as well. */
4487 7337 : bool is_module_init = (default_init
4488 7337 : && !omp_target
4489 7337 : && module_global_init_needed ());
4490 7337 : tree name = NULL_TREE;
4491 :
4492 7337 : if (is_module_init)
4493 1937 : name = mangle_module_global_init (0);
4494 : else
4495 : {
4496 5400 : char type[14];
4497 :
4498 : /* We use `I' to indicate initialization and `D' to indicate
4499 : destruction. */
4500 5400 : unsigned len;
4501 5400 : if (omp_target)
4502 : /* Use "off_" signifying "offload" here. The name must be distinct
4503 : from the non-offload case. The format of the name is scanned in
4504 : tree.cc/get_file_function_name, so stick to the same length for
4505 : both name variants. */
4506 15 : len = sprintf (type, "off_%c", initp ? 'I' : 'D');
4507 : else
4508 5394 : len = sprintf (type, "sub_%c", initp ? 'I' : 'D');
4509 5400 : if (priority != DEFAULT_INIT_PRIORITY)
4510 : {
4511 40 : char joiner = '_';
4512 : #ifdef JOINER
4513 40 : joiner = JOINER;
4514 : #endif
4515 40 : type[len++] = joiner;
4516 40 : sprintf (type + len, "%.5u", priority);
4517 : }
4518 5400 : name = get_file_function_name (type);
4519 : }
4520 :
4521 7337 : tree fntype = build_function_type (void_type_node, void_list_node);
4522 7337 : tree fndecl = build_lang_decl (FUNCTION_DECL, name, fntype);
4523 :
4524 7337 : if (omp_target)
4525 : {
4526 15 : DECL_ATTRIBUTES (fndecl)
4527 15 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
4528 15 : DECL_ATTRIBUTES (fndecl));
4529 15 : DECL_ATTRIBUTES (fndecl)
4530 30 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
4531 15 : DECL_ATTRIBUTES (fndecl));
4532 : }
4533 :
4534 7337 : DECL_CONTEXT (fndecl) = FROB_CONTEXT (global_namespace);
4535 7337 : if (is_module_init)
4536 : {
4537 1937 : SET_DECL_ASSEMBLER_NAME (fndecl, name);
4538 1937 : TREE_PUBLIC (fndecl) = true;
4539 1937 : determine_visibility (fndecl);
4540 : }
4541 : else
4542 5400 : TREE_PUBLIC (fndecl) = 0;
4543 7337 : start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
4544 :
4545 : /* Mark as artificial because it's not explicitly in the user's
4546 : source code. */
4547 7337 : DECL_ARTIFICIAL (current_function_decl) = 1;
4548 :
4549 : /* Mark this declaration as used to avoid spurious warnings. */
4550 7337 : TREE_USED (current_function_decl) = 1;
4551 :
4552 : /* Mark this function as a global constructor or destructor. */
4553 7337 : if (initp)
4554 7328 : DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
4555 : else
4556 9 : DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
4557 :
4558 7337 : tree body = begin_compound_stmt (BCS_FN_BODY);
4559 :
4560 7337 : if (is_module_init && has_body)
4561 : {
4562 : // If the function is going to be empty, don't emit idempotency.
4563 : // 'static bool __in_chrg = false;
4564 : // if (__inchrg) return;
4565 : // __inchrg = true
4566 64 : tree var = build_lang_decl (VAR_DECL, in_charge_identifier,
4567 : boolean_type_node);
4568 64 : DECL_CONTEXT (var) = fndecl;
4569 64 : DECL_ARTIFICIAL (var) = true;
4570 64 : TREE_STATIC (var) = true;
4571 64 : pushdecl (var);
4572 64 : cp_finish_decl (var, NULL_TREE, false, NULL_TREE, 0);
4573 :
4574 64 : tree if_stmt = begin_if_stmt ();
4575 64 : finish_if_stmt_cond (var, if_stmt);
4576 64 : finish_return_stmt (NULL_TREE);
4577 64 : finish_then_clause (if_stmt);
4578 64 : finish_if_stmt (if_stmt);
4579 :
4580 64 : tree assign = build2 (MODIFY_EXPR, boolean_type_node,
4581 : var, boolean_true_node);
4582 64 : TREE_SIDE_EFFECTS (assign) = true;
4583 64 : finish_expr_stmt (assign);
4584 : }
4585 :
4586 7337 : return body;
4587 : }
4588 :
4589 : /* Finish a global constructor or destructor. Add it to the global
4590 : ctors or dtors, if STARTP is true. */
4591 :
4592 : static tree
4593 7334 : finish_objects (bool initp, unsigned priority, tree body, bool startp)
4594 : {
4595 : /* Finish up. */
4596 7334 : finish_compound_stmt (body);
4597 7334 : tree fn = finish_function (/*inline_p=*/false);
4598 :
4599 7334 : if (!startp)
4600 : ; // Neither ctor nor dtor I be.
4601 5461 : else if (initp)
4602 : {
4603 5452 : DECL_STATIC_CONSTRUCTOR (fn) = 1;
4604 5452 : decl_init_priority_insert (fn, priority);
4605 : }
4606 : else
4607 : {
4608 9 : DECL_STATIC_DESTRUCTOR (fn) = 1;
4609 9 : decl_fini_priority_insert (fn, priority);
4610 : }
4611 :
4612 7334 : return fn;
4613 : }
4614 :
4615 : /* The name of the function we create to handle initializations and
4616 : destructions for objects with static storage duration. */
4617 : #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
4618 : #define OMP_SSDF_IDENTIFIER "__omp_target_static_init_and_destruction"
4619 :
4620 : /* Begins the generation of the function that will handle all
4621 : initialization or destruction of objects with static storage
4622 : duration at PRIORITY.
4623 :
4624 : It is assumed that this function will be called once for the host, and once
4625 : for an OpenMP offload target. */
4626 :
4627 : static tree
4628 5470 : start_partial_init_fini_fn (bool initp, unsigned priority, unsigned count,
4629 : bool omp_target)
4630 : {
4631 5470 : char id[MAX (sizeof (SSDF_IDENTIFIER), sizeof (OMP_SSDF_IDENTIFIER))
4632 : + 1 /* \0 */ + 32];
4633 5470 : tree name;
4634 :
4635 : /* Create the identifier for this function. It will be of the form
4636 : SSDF_IDENTIFIER_<number> if not omp_target and otherwise
4637 : OMP_SSDF_IDENTIFIER_<number>. */
4638 5470 : sprintf (id, "%s_%u", omp_target ? OMP_SSDF_IDENTIFIER : SSDF_IDENTIFIER,
4639 : count);
4640 5470 : name = get_identifier (id);
4641 5470 : tree type = build_function_type (void_type_node, void_list_node);
4642 :
4643 : /* Create the FUNCTION_DECL itself. */
4644 5470 : tree fn = build_lang_decl (FUNCTION_DECL, name, type);
4645 5470 : TREE_PUBLIC (fn) = 0;
4646 5470 : DECL_ARTIFICIAL (fn) = 1;
4647 :
4648 5470 : if (omp_target)
4649 : {
4650 15 : DECL_ATTRIBUTES (fn)
4651 15 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
4652 15 : DECL_ATTRIBUTES (fn));
4653 15 : DECL_ATTRIBUTES (fn)
4654 30 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
4655 15 : DECL_ATTRIBUTES (fn));
4656 : }
4657 :
4658 5470 : int idx = initp + 2 * omp_target;
4659 :
4660 : /* Put this function in the list of functions to be called from the
4661 : static constructors and destructors. */
4662 5470 : if (!static_init_fini_fns[idx])
4663 5440 : static_init_fini_fns[idx] = priority_map_t::create_ggc ();
4664 5470 : auto &slot = static_init_fini_fns[idx]->get_or_insert (priority);
4665 5470 : slot = tree_cons (fn, NULL_TREE, slot);
4666 :
4667 : /* Put the function in the global scope. */
4668 5470 : pushdecl (fn);
4669 :
4670 : /* Start the function itself. This is equivalent to declaring the
4671 : function as:
4672 :
4673 : static void __ssdf (int __initialize_p, init __priority_p);
4674 :
4675 : It is static because we only need to call this function from the
4676 : various constructor and destructor functions for this module. */
4677 5470 : start_preparsed_function (fn, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
4678 :
4679 : /* Set up the scope of the outermost block in the function. */
4680 5470 : return begin_compound_stmt (BCS_FN_BODY);
4681 : }
4682 :
4683 : /* Finish the generation of the function which performs initialization
4684 : or destruction of objects with static storage duration. */
4685 :
4686 : static void
4687 5470 : finish_partial_init_fini_fn (tree body)
4688 : {
4689 : /* Close out the function. */
4690 5470 : finish_compound_stmt (body);
4691 5470 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
4692 5470 : }
4693 :
4694 : /* The effective initialization priority of a DECL. */
4695 :
4696 : #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
4697 : ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
4698 : ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
4699 :
4700 : /* Whether a DECL needs a guard to protect it against multiple
4701 : initialization. */
4702 :
4703 : #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
4704 : || DECL_ONE_ONLY (decl) \
4705 : || DECL_WEAK (decl)))
4706 :
4707 : /* Walks the initializer list of a global variable and looks for
4708 : temporary variables (DECL_NAME() == NULL and DECL_ARTIFICIAL != 0)
4709 : and that have their DECL_CONTEXT() == NULL. For each such
4710 : temporary variable, set their DECL_CONTEXT() to CTX -- the
4711 : initializing function. This is necessary because otherwise some
4712 : optimizers (enabled by -O2 -fprofile-arcs) might crash when trying
4713 : to refer to a temporary variable that does not have its
4714 : DECL_CONTEXT() properly set. */
4715 :
4716 : static tree
4717 267047 : fix_temporary_vars_context_r (tree *node,
4718 : int * /*unused*/,
4719 : void *ctx)
4720 : {
4721 267047 : if (TREE_CODE (*node) == BIND_EXPR)
4722 800 : for (tree var = BIND_EXPR_VARS (*node); var; var = DECL_CHAIN (var))
4723 400 : if (VAR_P (var) && !DECL_NAME (var)
4724 800 : && DECL_ARTIFICIAL (var) && !DECL_CONTEXT (var))
4725 400 : DECL_CONTEXT (var) = tree (ctx);
4726 :
4727 267047 : return NULL_TREE;
4728 : }
4729 :
4730 : /* Set up to handle the initialization or destruction of DECL. If
4731 : INITP is nonzero, we are initializing the variable. Otherwise, we
4732 : are destroying it. */
4733 :
4734 : static void
4735 10980 : one_static_initialization_or_destruction (bool initp, tree decl, tree init,
4736 : bool omp_target)
4737 : {
4738 : /* If we are supposed to destruct and there's a trivial destructor,
4739 : nothing has to be done. */
4740 10980 : gcc_checking_assert (init || !TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)));
4741 :
4742 : /* Trick the compiler into thinking we are at the file and line
4743 : where DECL was declared so that error-messages make sense, and so
4744 : that the debugger will show somewhat sensible file and line
4745 : information. */
4746 10980 : input_location = DECL_SOURCE_LOCATION (decl);
4747 :
4748 : /* Make sure temporary variables in the initialiser all have
4749 : their DECL_CONTEXT() set to a value different from NULL_TREE.
4750 : This can happen when global variables initializers are built.
4751 : In that case, the DECL_CONTEXT() of the global variables _AND_ of all
4752 : the temporary variables that might have been generated in the
4753 : accompanying initializers is NULL_TREE, meaning the variables have been
4754 : declared in the global namespace.
4755 : What we want to do here is to fix that and make sure the DECL_CONTEXT()
4756 : of the temporaries are set to the current function decl. */
4757 10980 : cp_walk_tree_without_duplicates (&init,
4758 : fix_temporary_vars_context_r,
4759 : current_function_decl);
4760 :
4761 : /* Because of:
4762 :
4763 : [class.access.spec]
4764 :
4765 : Access control for implicit calls to the constructors,
4766 : the conversion functions, or the destructor called to
4767 : create and destroy a static data member is performed as
4768 : if these calls appeared in the scope of the member's
4769 : class.
4770 :
4771 : we pretend we are in a static member function of the class of
4772 : which the DECL is a member. */
4773 10980 : if (member_p (decl))
4774 : {
4775 1516 : DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
4776 1516 : DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
4777 : }
4778 :
4779 : /* Assume we don't need a guard. */
4780 10980 : tree guard_if_stmt = NULL_TREE;
4781 :
4782 : /* We need a guard if this is an object with external linkage that
4783 : might be initialized in more than one place. (For example, a
4784 : static data member of a template, when the data member requires
4785 : construction.) */
4786 10980 : if (NEEDS_GUARD_P (decl))
4787 : {
4788 876 : tree guard = get_guard (decl);
4789 876 : tree guard_cond;
4790 :
4791 876 : if (flag_use_cxa_atexit)
4792 : {
4793 : /* When using __cxa_atexit, we just check the GUARD as we
4794 : would for a local static. We never try to destroy
4795 : anything from a static destructor. */
4796 876 : gcc_assert (initp);
4797 876 : guard_cond = get_guard_cond (guard, false);
4798 : }
4799 : else
4800 : {
4801 : /* If we don't have __cxa_atexit, then we will be running
4802 : destructors from .fini sections, or their equivalents.
4803 : So, we need to know how many times we've tried to
4804 : initialize this object. We do initializations only if
4805 : the GUARD was or becomes zero (initp vs !initp
4806 : respectively). */
4807 0 : guard_cond = cp_build_unary_op (initp ? POSTINCREMENT_EXPR
4808 : : PREDECREMENT_EXPR,
4809 : guard,
4810 : /*noconvert=*/true,
4811 : tf_warning_or_error);
4812 0 : guard_cond = cp_build_binary_op (input_location, EQ_EXPR, guard_cond,
4813 : integer_zero_node,
4814 : tf_warning_or_error);
4815 : }
4816 :
4817 876 : guard_if_stmt = begin_if_stmt ();
4818 876 : finish_if_stmt_cond (guard_cond, guard_if_stmt);
4819 :
4820 876 : if (flag_use_cxa_atexit)
4821 : /* Set the GUARD now. */
4822 876 : finish_expr_stmt (set_guard (guard));
4823 : }
4824 :
4825 : /* Perform the initialization or destruction. */
4826 10980 : if (initp)
4827 : {
4828 10965 : if (init)
4829 : {
4830 10422 : finish_expr_stmt (init);
4831 10422 : if (sanitize_flags_p (SANITIZE_ADDRESS, decl))
4832 28 : if (varpool_node *vnode = varpool_node::get (decl))
4833 28 : vnode->dynamically_initialized = 1;
4834 : }
4835 :
4836 : /* If we're using __cxa_atexit, register a function that calls the
4837 : destructor for the object. */
4838 10965 : if (flag_use_cxa_atexit)
4839 10956 : finish_expr_stmt (register_dtor_fn (decl, omp_target));
4840 : }
4841 : else
4842 15 : finish_expr_stmt (build_cleanup (decl));
4843 :
4844 : /* Finish the guard if-stmt, if necessary. */
4845 10980 : if (guard_if_stmt)
4846 : {
4847 876 : finish_then_clause (guard_if_stmt);
4848 876 : finish_if_stmt (guard_if_stmt);
4849 : }
4850 :
4851 : /* Now that we're done with DECL we don't need to pretend to be a
4852 : member of its class any longer. */
4853 10980 : DECL_CONTEXT (current_function_decl) = NULL_TREE;
4854 10980 : DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
4855 10980 : }
4856 :
4857 : /* Helper function for emit_partial_init_fini_fn and handle_tls_init.
4858 : For structured bindings, disable stmts_are_full_exprs_p ()
4859 : on STATIC_INIT_DECOMP_BASE_P nodes, reenable it on the
4860 : first STATIC_INIT_DECOMP_NONBASE_P node and emit all the
4861 : STATIC_INIT_DECOMP_BASE_P and STATIC_INIT_DECOMP_NONBASE_P
4862 : consecutive nodes in a single STATEMENT_LIST wrapped with
4863 : CLEANUP_POINT_EXPR. */
4864 :
4865 : static inline tree
4866 10980 : decomp_handle_one_var (tree node, tree sl, bool *saw_nonbase,
4867 : int save_stmts_are_full_exprs_p)
4868 : {
4869 11049 : if (sl && !*saw_nonbase && STATIC_INIT_DECOMP_NONBASE_P (node))
4870 : {
4871 63 : *saw_nonbase = true;
4872 63 : current_stmt_tree ()->stmts_are_full_exprs_p
4873 63 : = save_stmts_are_full_exprs_p;
4874 : }
4875 11127 : else if (sl && *saw_nonbase && !STATIC_INIT_DECOMP_NONBASE_P (node))
4876 : {
4877 45 : sl = pop_stmt_list (sl);
4878 45 : sl = maybe_cleanup_point_expr_void (sl);
4879 45 : add_stmt (sl);
4880 45 : sl = NULL_TREE;
4881 : }
4882 21726 : if (sl == NULL_TREE && STATIC_INIT_DECOMP_BASE_P (node))
4883 : {
4884 63 : sl = push_stmt_list ();
4885 63 : *saw_nonbase = false;
4886 63 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
4887 : }
4888 10980 : return sl;
4889 : }
4890 :
4891 : /* Similarly helper called when the whole var list is processed. */
4892 :
4893 : static inline void
4894 5547 : decomp_finalize_var_list (tree sl, int save_stmts_are_full_exprs_p)
4895 : {
4896 5547 : if (sl)
4897 : {
4898 18 : current_stmt_tree ()->stmts_are_full_exprs_p
4899 18 : = save_stmts_are_full_exprs_p;
4900 18 : sl = pop_stmt_list (sl);
4901 18 : sl = maybe_cleanup_point_expr_void (sl);
4902 18 : add_stmt (sl);
4903 : }
4904 5547 : }
4905 :
4906 : /* Helper for emit_partial_init_fini_fn OpenMP target handling, called via
4907 : walk_tree. Set DECL_CONTEXT on any automatic temporaries which still
4908 : have it NULL to id->src_fn, so that later copy_tree_body_r can remap those.
4909 : Otherwise DECL_CONTEXT would be set only during gimplification of the host
4910 : fn and when copy_tree_body_r doesn't remap those, we'd ICE during the
4911 : target fn gimplification because the same automatic VAR_DECL can't be
4912 : used in multiple functions (with the exception of nested functions). */
4913 :
4914 : static tree
4915 303 : set_context_for_auto_vars_r (tree *tp, int *, void *data)
4916 : {
4917 303 : copy_body_data *id = (copy_body_data *) data;
4918 303 : if (auto_var_in_fn_p (*tp, NULL_TREE) && DECL_ARTIFICIAL (*tp))
4919 11 : DECL_CONTEXT (*tp) = id->src_fn;
4920 303 : return NULL_TREE;
4921 : }
4922 :
4923 : /* Generate code to do the initialization or destruction of the decls in VARS,
4924 : a TREE_LIST of VAR_DECL with static storage duration.
4925 : Whether initialization or destruction is performed is specified by INITP. */
4926 :
4927 : static tree
4928 5424 : emit_partial_init_fini_fn (bool initp, unsigned priority, tree vars,
4929 : unsigned counter, location_t locus, tree host_fn)
4930 : {
4931 5424 : input_location = locus;
4932 5424 : bool omp_target = (host_fn != NULL_TREE);
4933 5424 : tree body = start_partial_init_fini_fn (initp, priority, counter, omp_target);
4934 5424 : tree fndecl = current_function_decl;
4935 :
4936 5424 : tree nonhost_if_stmt = NULL_TREE;
4937 5424 : if (omp_target)
4938 : {
4939 15 : nonhost_if_stmt = begin_if_stmt ();
4940 : /* We add an "omp declare target nohost" attribute, but (for
4941 : now) we still get a copy of the constructor/destructor on
4942 : the host. Make sure it does nothing unless we're on the
4943 : target device. */
4944 15 : tree fn = builtin_decl_explicit (BUILT_IN_OMP_IS_INITIAL_DEVICE);
4945 15 : tree initial_dev = build_call_expr (fn, 0);
4946 15 : tree target_dev_p
4947 15 : = cp_build_binary_op (input_location, NE_EXPR, initial_dev,
4948 : integer_one_node, tf_warning_or_error);
4949 15 : finish_if_stmt_cond (target_dev_p, nonhost_if_stmt);
4950 : }
4951 :
4952 5424 : tree sl = NULL_TREE;
4953 5424 : int save_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4954 5424 : bool saw_nonbase = false;
4955 15597 : for (tree node = vars; node; node = TREE_CHAIN (node))
4956 : {
4957 10173 : tree decl = TREE_VALUE (node);
4958 10173 : tree init = TREE_PURPOSE (node);
4959 10173 : sl = decomp_handle_one_var (node, sl, &saw_nonbase,
4960 : save_stmts_are_full_exprs_p);
4961 : /* We will emit 'init' twice, and it is modified in-place during
4962 : gimplification. Make a copy here. */
4963 10173 : if (omp_target)
4964 : {
4965 : /* We've already emitted INIT in the host version of the ctor/dtor
4966 : function. We need to deep-copy it (including new versions of
4967 : local variables introduced, etc.) for use in the target
4968 : ctor/dtor function. */
4969 19 : copy_body_data id;
4970 19 : hash_map<tree, tree> decl_map;
4971 19 : memset (&id, 0, sizeof (id));
4972 19 : id.src_fn = host_fn;
4973 19 : id.dst_fn = current_function_decl;
4974 19 : id.src_cfun = DECL_STRUCT_FUNCTION (id.src_fn);
4975 19 : id.decl_map = &decl_map;
4976 19 : id.copy_decl = copy_decl_no_change;
4977 19 : id.transform_call_graph_edges = CB_CGE_DUPLICATE;
4978 19 : id.transform_new_cfg = true;
4979 19 : id.transform_return_to_modify = false;
4980 19 : id.eh_lp_nr = 0;
4981 19 : walk_tree (&init, set_context_for_auto_vars_r, &id, NULL);
4982 19 : walk_tree (&init, copy_tree_body_r, &id, NULL);
4983 19 : }
4984 : /* Do one initialization or destruction. */
4985 10173 : one_static_initialization_or_destruction (initp, decl, init, omp_target);
4986 : }
4987 5424 : decomp_finalize_var_list (sl, save_stmts_are_full_exprs_p);
4988 :
4989 5424 : if (omp_target)
4990 : {
4991 : /* Finish up nonhost if-stmt body. */
4992 15 : finish_then_clause (nonhost_if_stmt);
4993 15 : finish_if_stmt (nonhost_if_stmt);
4994 : }
4995 :
4996 : /* Finish up the static storage duration function for this
4997 : round. */
4998 5424 : input_location = locus;
4999 5424 : finish_partial_init_fini_fn (body);
5000 :
5001 5424 : return fndecl;
5002 : }
5003 :
5004 : /* VARS is a list of variables with static storage duration which may
5005 : need initialization and/or finalization. Remove those variables
5006 : that don't really need to be initialized or finalized, and return
5007 : the resulting list. The order in which the variables appear in
5008 : VARS is in reverse order of the order in which they should actually
5009 : be initialized. That order is preserved. */
5010 :
5011 : static tree
5012 282172 : prune_vars_needing_no_initialization (tree *vars)
5013 : {
5014 282172 : tree *var = vars;
5015 282172 : tree result = NULL_TREE;
5016 :
5017 293124 : while (*var)
5018 : {
5019 10952 : tree t = *var;
5020 10952 : tree decl = TREE_VALUE (t);
5021 10952 : tree init = TREE_PURPOSE (t);
5022 :
5023 : /* Deal gracefully with error. */
5024 10952 : if (error_operand_p (decl))
5025 : {
5026 0 : var = &TREE_CHAIN (t);
5027 0 : continue;
5028 : }
5029 :
5030 : /* The only things that can be initialized are variables. */
5031 10952 : gcc_assert (VAR_P (decl));
5032 :
5033 : /* If this object is not defined, we don't need to do anything
5034 : here. */
5035 10952 : if (DECL_EXTERNAL (decl))
5036 : {
5037 0 : gcc_checking_assert (!STATIC_INIT_DECOMP_BASE_P (t)
5038 : && !STATIC_INIT_DECOMP_NONBASE_P (t));
5039 0 : var = &TREE_CHAIN (t);
5040 0 : continue;
5041 : }
5042 :
5043 : /* Also, if the initializer already contains errors, we can bail
5044 : out now. */
5045 10406 : if (init && TREE_CODE (init) == TREE_LIST
5046 10952 : && value_member (error_mark_node, init))
5047 : {
5048 0 : var = &TREE_CHAIN (t);
5049 0 : continue;
5050 : }
5051 :
5052 : /* Reflections are consteval-only types and we don't want them
5053 : to survive until gimplification. */
5054 10952 : if (consteval_only_p (decl))
5055 : {
5056 0 : var = &TREE_CHAIN (t);
5057 0 : continue;
5058 : }
5059 :
5060 : /* This variable is going to need initialization and/or
5061 : finalization, so we add it to the list. */
5062 10952 : *var = TREE_CHAIN (t);
5063 10952 : TREE_CHAIN (t) = result;
5064 10952 : result = t;
5065 : }
5066 :
5067 282172 : return result;
5068 : }
5069 :
5070 : /* Split VAR_LIST by init priority and add into PARTS hash table.
5071 : This reverses the variable ordering. */
5072 :
5073 : void
5074 5392 : partition_vars_for_init_fini (tree var_list, priority_map_t *(&parts)[4])
5075 : {
5076 5392 : unsigned priority = 0;
5077 5392 : enum { none, base, nonbase } decomp_state = none;
5078 15537 : for (auto node = var_list; node; node = TREE_CHAIN (node))
5079 : {
5080 10145 : tree decl = TREE_VALUE (node);
5081 10145 : tree init = TREE_PURPOSE (node);
5082 10145 : bool has_cleanup = !TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl));
5083 10145 : if (decomp_state == base && STATIC_INIT_DECOMP_NONBASE_P (node))
5084 : decomp_state = nonbase;
5085 10109 : else if (decomp_state == nonbase && !STATIC_INIT_DECOMP_NONBASE_P (node))
5086 : decomp_state = none;
5087 10124 : if (decomp_state == none)
5088 20019 : priority = DECL_EFFECTIVE_INIT_PRIORITY (decl);
5089 :
5090 10145 : if (init || (flag_use_cxa_atexit && has_cleanup))
5091 : {
5092 : // Add to initialization list.
5093 10139 : if (!parts[true])
5094 5386 : parts[true] = priority_map_t::create_ggc ();
5095 10139 : auto &slot = parts[true]->get_or_insert (priority);
5096 10139 : slot = tree_cons (init, decl, slot);
5097 10139 : if (init
5098 9626 : && STATIC_INIT_DECOMP_BASE_P (node)
5099 10175 : && decomp_state == none)
5100 : {
5101 : /* If one or more STATIC_INIT_DECOMP_BASE_P with at least
5102 : one init is followed by at least one
5103 : STATIC_INIT_DECOMP_NONBASE_P with init, mark it in the
5104 : resulting chain as well. */
5105 39 : for (tree n = TREE_CHAIN (node); n; n = TREE_CHAIN (n))
5106 39 : if (STATIC_INIT_DECOMP_BASE_P (n))
5107 0 : continue;
5108 39 : else if (STATIC_INIT_DECOMP_NONBASE_P (n))
5109 : {
5110 39 : if (TREE_PURPOSE (n))
5111 : {
5112 : decomp_state = base;
5113 : break;
5114 : }
5115 : else
5116 3 : continue;
5117 : }
5118 : else
5119 : break;
5120 : }
5121 10139 : if (init && decomp_state == base)
5122 36 : STATIC_INIT_DECOMP_BASE_P (slot) = 1;
5123 10103 : else if (decomp_state == nonbase)
5124 120 : STATIC_INIT_DECOMP_NONBASE_P (slot) = 1;
5125 : }
5126 :
5127 10145 : if (!flag_use_cxa_atexit && has_cleanup)
5128 : {
5129 : // Add to finalization list.
5130 15 : if (!parts[false])
5131 9 : parts[false] = priority_map_t::create_ggc ();
5132 15 : auto &slot = parts[false]->get_or_insert (priority);
5133 15 : slot = tree_cons (NULL_TREE, decl, slot);
5134 : }
5135 :
5136 10145 : if (flag_openmp
5137 10145 : && lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl)))
5138 : {
5139 19 : priority_map_t **omp_parts = parts + 2;
5140 :
5141 19 : if (init || (flag_use_cxa_atexit && has_cleanup))
5142 : {
5143 : // Add to initialization list.
5144 19 : if (!omp_parts[true])
5145 14 : omp_parts[true] = priority_map_t::create_ggc ();
5146 19 : auto &slot = omp_parts[true]->get_or_insert (priority);
5147 19 : slot = tree_cons (init, decl, slot);
5148 19 : if (init && decomp_state == base)
5149 0 : STATIC_INIT_DECOMP_BASE_P (slot) = 1;
5150 19 : else if (decomp_state == nonbase)
5151 0 : STATIC_INIT_DECOMP_NONBASE_P (slot) = 1;
5152 : }
5153 :
5154 19 : if (!flag_use_cxa_atexit && has_cleanup)
5155 : {
5156 : // Add to finalization list.
5157 0 : if (!omp_parts[false])
5158 0 : omp_parts[false] = priority_map_t::create_ggc ();
5159 0 : auto &slot = omp_parts[false]->get_or_insert (priority);
5160 0 : slot = tree_cons (NULL_TREE, decl, slot);
5161 : }
5162 : }
5163 : }
5164 5392 : }
5165 :
5166 : /* Make sure we have told the back end about all the variables in
5167 : VARS. */
5168 :
5169 : static void
5170 5515 : write_out_vars (tree vars)
5171 : {
5172 5515 : tree v;
5173 :
5174 16467 : for (v = vars; v; v = TREE_CHAIN (v))
5175 : {
5176 10952 : tree var = TREE_VALUE (v);
5177 10952 : if (!var_finalized_p (var))
5178 : {
5179 807 : import_export_decl (var);
5180 807 : rest_of_decl_compilation (var, 1, 1);
5181 : }
5182 : }
5183 5515 : }
5184 :
5185 : /* Generate a static constructor or destructor that calls the given
5186 : init/fini fns at the indicated priority. */
5187 :
5188 : static void
5189 7328 : generate_ctor_or_dtor_function (bool initp, unsigned priority,
5190 : tree fns, location_t locus, bool omp_target)
5191 : {
5192 7328 : input_location = locus;
5193 7328 : tree body = start_objects (initp, priority, bool (fns), omp_target);
5194 :
5195 7328 : if (fns)
5196 : {
5197 : /* To make sure dynamic construction doesn't access globals from
5198 : other compilation units where they might not be yet
5199 : constructed, for -fsanitize=address insert
5200 : __asan_before_dynamic_init call that prevents access to
5201 : either all global variables that need construction in other
5202 : compilation units, or at least those that haven't been
5203 : initialized yet. Variables that need dynamic construction in
5204 : the current compilation unit are kept accessible. */
5205 5455 : if (initp && (flag_sanitize & SANITIZE_ADDRESS))
5206 21 : finish_expr_stmt (asan_dynamic_init_call (/*after_p=*/false));
5207 :
5208 : /* Call the static init/fini functions. */
5209 10925 : for (tree node = fns; node; node = TREE_CHAIN (node))
5210 : {
5211 5470 : tree fn = TREE_PURPOSE (node);
5212 :
5213 : // We should never find a pure or constant cdtor.
5214 5470 : gcc_checking_assert (!(flags_from_decl_or_type (fn)
5215 : & (ECF_CONST | ECF_PURE)));
5216 :
5217 5470 : tree call = cp_build_function_call_nary (fn, tf_warning_or_error,
5218 : NULL_TREE);
5219 5470 : finish_expr_stmt (call);
5220 : }
5221 :
5222 : /* Revert what __asan_before_dynamic_init did by calling
5223 : __asan_after_dynamic_init. */
5224 5455 : if (initp && (flag_sanitize & SANITIZE_ADDRESS))
5225 21 : finish_expr_stmt (asan_dynamic_init_call (/*after_p=*/true));
5226 : }
5227 :
5228 : /* Close out the function, and arrange for it to be called at init
5229 : or fini time, if non-empty. (Even non-nop module initializer
5230 : functions need this, as we cannot guarantee the module is
5231 : imported somewhere in the program.) */
5232 7328 : expand_or_defer_fn (finish_objects (initp, priority, body, fns != NULL_TREE));
5233 7328 : }
5234 :
5235 : /* Return C++ property of T, based on given operation OP. */
5236 :
5237 : static int
5238 1941 : cpp_check (tree t, cpp_operation op)
5239 : {
5240 1941 : switch (op)
5241 : {
5242 9 : case HAS_DEPENDENT_TEMPLATE_ARGS:
5243 9 : {
5244 9 : tree ti = CLASSTYPE_TEMPLATE_INFO (t);
5245 9 : if (!ti)
5246 : return 0;
5247 9 : ++processing_template_decl;
5248 9 : const bool dep = any_dependent_template_arguments_p (TI_ARGS (ti));
5249 9 : --processing_template_decl;
5250 9 : return dep;
5251 : }
5252 294 : case IS_ABSTRACT:
5253 294 : return DECL_PURE_VIRTUAL_P (t);
5254 165 : case IS_ASSIGNMENT_OPERATOR:
5255 165 : return DECL_ASSIGNMENT_OPERATOR_P (t);
5256 165 : case IS_CONSTRUCTOR:
5257 330 : return DECL_CONSTRUCTOR_P (t);
5258 165 : case IS_DESTRUCTOR:
5259 330 : return DECL_DESTRUCTOR_P (t);
5260 165 : case IS_COPY_CONSTRUCTOR:
5261 477 : return DECL_COPY_CONSTRUCTOR_P (t);
5262 165 : case IS_MOVE_CONSTRUCTOR:
5263 483 : return DECL_MOVE_CONSTRUCTOR_P (t);
5264 447 : case IS_TEMPLATE:
5265 447 : return TREE_CODE (t) == TEMPLATE_DECL;
5266 366 : case IS_TRIVIAL:
5267 366 : return trivial_type_p (t);
5268 : default:
5269 : return 0;
5270 : }
5271 : }
5272 :
5273 : /* Collect source file references recursively, starting from NAMESPC. */
5274 :
5275 : static void
5276 78 : collect_source_refs (tree namespc)
5277 : {
5278 : /* Iterate over names in this name space. */
5279 183143 : for (tree t = NAMESPACE_LEVEL (namespc)->names; t; t = TREE_CHAIN (t))
5280 183065 : if (DECL_IS_UNDECLARED_BUILTIN (t))
5281 : ;
5282 240 : else if (TREE_CODE (t) == NAMESPACE_DECL && !DECL_NAMESPACE_ALIAS (t))
5283 3 : collect_source_refs (t);
5284 : else
5285 237 : collect_source_ref (DECL_SOURCE_FILE (t));
5286 78 : }
5287 :
5288 : /* Collect decls relevant to SOURCE_FILE from all namespaces recursively,
5289 : starting from NAMESPC. */
5290 :
5291 : static void
5292 228 : collect_ada_namespace (tree namespc, const char *source_file)
5293 : {
5294 228 : tree decl = NAMESPACE_LEVEL (namespc)->names;
5295 :
5296 : /* Collect decls from this namespace. This will skip
5297 : NAMESPACE_DECLs (both aliases and regular, it cannot tell). */
5298 228 : collect_ada_nodes (decl, source_file);
5299 :
5300 : /* Now scan for namespace children, and dump them. */
5301 219321 : for (; decl; decl = TREE_CHAIN (decl))
5302 218865 : if (TREE_CODE (decl) == NAMESPACE_DECL && !DECL_NAMESPACE_ALIAS (decl))
5303 153 : collect_ada_namespace (decl, source_file);
5304 228 : }
5305 :
5306 : /* Returns true iff there is a definition available for variable or
5307 : function DECL. */
5308 :
5309 : bool
5310 87895680 : decl_defined_p (tree decl)
5311 : {
5312 87895680 : if (TREE_CODE (decl) == FUNCTION_DECL)
5313 77770631 : return (DECL_INITIAL (decl) != NULL_TREE
5314 : /* A pending instantiation of a friend temploid is defined. */
5315 77770631 : || (DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
5316 7353027 : && DECL_INITIAL (DECL_TEMPLATE_RESULT
5317 : (DECL_TI_TEMPLATE (decl)))));
5318 : else
5319 : {
5320 10125049 : gcc_assert (VAR_P (decl));
5321 10125049 : return !DECL_EXTERNAL (decl);
5322 : }
5323 : }
5324 :
5325 : /* Nonzero for a VAR_DECL whose value can be used in a constant expression.
5326 :
5327 : [expr.const]
5328 :
5329 : An integral constant-expression can only involve ... const
5330 : variables of integral or enumeration types initialized with
5331 : constant expressions ...
5332 :
5333 : C++0x also allows constexpr variables and temporaries initialized
5334 : with constant expressions. We handle the former here, but the latter
5335 : are just folded away in cxx_eval_constant_expression.
5336 :
5337 : The standard does not require that the expression be non-volatile.
5338 : G++ implements the proposed correction in DR 457. */
5339 :
5340 : bool
5341 1352155472 : decl_constant_var_p (tree decl)
5342 : {
5343 1352155472 : if (!decl_maybe_constant_var_p (decl))
5344 : return false;
5345 :
5346 : /* We don't know if a template static data member is initialized with
5347 : a constant expression until we instantiate its initializer. Even
5348 : in the case of a constexpr variable, we can't treat it as a
5349 : constant until its initializer is complete in case it's used in
5350 : its own initializer. */
5351 167913232 : maybe_instantiate_decl (decl);
5352 167910535 : return DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl);
5353 : }
5354 :
5355 : /* Returns true if DECL could be a symbolic constant variable, depending on
5356 : its initializer. */
5357 :
5358 : bool
5359 1768829489 : decl_maybe_constant_var_p (tree decl)
5360 : {
5361 1768829489 : tree type = TREE_TYPE (decl);
5362 1768829489 : if (!VAR_P (decl))
5363 : return false;
5364 848125698 : if (DECL_DECLARED_CONSTEXPR_P (decl)
5365 848125698 : && (!TREE_THIS_VOLATILE (decl) || NULLPTR_TYPE_P (type)))
5366 : return true;
5367 488774075 : if (DECL_HAS_VALUE_EXPR_P (decl))
5368 : /* A proxy isn't constant. */
5369 : return false;
5370 480203703 : if (TYPE_REF_P (type))
5371 : /* References can be constant. */;
5372 472144341 : else if (CP_TYPE_CONST_NON_VOLATILE_P (type)
5373 472144341 : && INTEGRAL_OR_ENUMERATION_TYPE_P (type))
5374 : /* And const integers. */;
5375 : else
5376 : return false;
5377 :
5378 92014910 : if (DECL_INITIAL (decl)
5379 141254739 : && !DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
5380 : /* We know the initializer, and it isn't constant. */
5381 : return false;
5382 : else
5383 : return true;
5384 : }
5385 :
5386 : /* Complain that DECL uses a type with no linkage. In C++98 mode this is
5387 : called from grokfndecl and grokvardecl; in all modes it is called from
5388 : cp_write_global_declarations. */
5389 :
5390 : void
5391 1713556 : no_linkage_error (tree decl)
5392 : {
5393 1713556 : if (cxx_dialect >= cxx11
5394 1713556 : && (decl_defined_p (decl)
5395 : /* Treat templates which limit_bad_template_recursion decided
5396 : not to instantiate as if they were defined. */
5397 128 : || (errorcount + sorrycount > 0
5398 53 : && DECL_LANG_SPECIFIC (decl)
5399 53 : && DECL_TEMPLATE_INFO (decl)
5400 33 : && warning_suppressed_p (decl /* What warning? */))))
5401 : /* In C++11 it's ok if the decl is defined. */
5402 659653 : return;
5403 :
5404 1053903 : if (DECL_LANG_SPECIFIC (decl) && DECL_MODULE_IMPORT_P (decl))
5405 : /* An imported decl is ok. */
5406 : return;
5407 :
5408 : /* Metafunctions are magic and should be considered defined even though
5409 : they have no bodies. ??? This can't be checked in decl_defined_p;
5410 : we'd get redefinition errors for some of our metafunctions. */
5411 1053858 : if (TREE_CODE (decl) == FUNCTION_DECL && metafunction_p (decl))
5412 : return;
5413 :
5414 1053855 : tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
5415 1053855 : if (t == NULL_TREE)
5416 : /* The type that got us on no_linkage_decls must have gotten a name for
5417 : linkage purposes. */;
5418 74 : else if (CLASS_TYPE_P (t) && TYPE_BEING_DEFINED (t))
5419 : // FIXME: This is now invalid, as a DR to c++98
5420 : /* The type might end up having a typedef name for linkage purposes. */
5421 0 : vec_safe_push (no_linkage_decls, decl);
5422 201 : else if (TYPE_UNNAMED_P (t))
5423 : {
5424 26 : bool d = false;
5425 26 : auto_diagnostic_group grp;
5426 26 : if (cxx_dialect >= cxx11)
5427 : {
5428 : /* If t is declared in a module CMI, then decl could actually
5429 : be defined in a different TU, so don't warn since C++20. */
5430 9 : tree relaxed = no_linkage_check (t, /*relaxed_p=*/true);
5431 9 : if (relaxed != NULL_TREE)
5432 9 : d = permerror (DECL_SOURCE_LOCATION (decl),
5433 : "%q#D, declared using an unnamed type, "
5434 : "is used but never defined", decl);
5435 0 : else if (cxx_dialect < cxx20)
5436 0 : d = pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wc__20_extensions,
5437 : "%q#D, declared using an unnamed type, "
5438 : "is used but not defined", decl);
5439 : }
5440 17 : else if (DECL_EXTERN_C_P (decl))
5441 : /* Allow this; it's pretty common in C. */;
5442 17 : else if (VAR_P (decl))
5443 : /* DRs 132, 319 and 389 seem to indicate types with
5444 : no linkage can only be used to declare extern "C"
5445 : entities. Since it's not always an error in the
5446 : ISO C++ 90 Standard, we only issue a warning. */
5447 16 : d = warning_at (DECL_SOURCE_LOCATION (decl), 0, "unnamed type "
5448 : "with no linkage used to declare variable %q#D with "
5449 : "linkage", decl);
5450 : else
5451 1 : d = permerror (DECL_SOURCE_LOCATION (decl), "unnamed type with no "
5452 : "linkage used to declare function %q#D with linkage",
5453 : decl);
5454 26 : if (d && is_typedef_decl (TYPE_NAME (t)))
5455 0 : inform (DECL_SOURCE_LOCATION (TYPE_NAME (t)), "%q#D does not refer "
5456 : "to the unqualified type, so it is not used for linkage",
5457 0 : TYPE_NAME (t));
5458 : /* Suppress warning from check_global_declaration if needed. */
5459 26 : if (d)
5460 23 : suppress_warning (decl, OPT_Wunused);
5461 26 : }
5462 48 : else if (cxx_dialect >= cxx11)
5463 : {
5464 48 : if (VAR_P (decl) || !DECL_PURE_VIRTUAL_P (decl))
5465 : {
5466 : /* Similarly for local types in a function with vague linkage or
5467 : defined in a module CMI, then decl could actually be defined
5468 : in a different TU, so don't warn since C++20. */
5469 45 : bool d = false;
5470 45 : tree relaxed = no_linkage_check (t, /*relaxed_p=*/true);
5471 45 : if (relaxed != NULL_TREE)
5472 30 : d = permerror (DECL_SOURCE_LOCATION (decl),
5473 : "%q#D, declared using local type "
5474 : "%qT, is used but never defined", decl, t);
5475 15 : else if (cxx_dialect < cxx20)
5476 3 : d = pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wc__20_extensions,
5477 : "%q#D, declared using local type "
5478 : "%qT, is used but not defined here", decl, t);
5479 : /* Suppress warning from check_global_declaration if needed. */
5480 33 : if (d)
5481 33 : suppress_warning (decl, OPT_Wunused);
5482 : }
5483 : }
5484 0 : else if (VAR_P (decl))
5485 0 : warning_at (DECL_SOURCE_LOCATION (decl), 0, "type %qT with no linkage "
5486 : "used to declare variable %q#D with linkage", t, decl);
5487 : else
5488 0 : permerror (DECL_SOURCE_LOCATION (decl), "type %qT with no linkage used "
5489 : "to declare function %q#D with linkage", t, decl);
5490 : }
5491 :
5492 : /* Collect declarations from all namespaces relevant to SOURCE_FILE. */
5493 :
5494 : static void
5495 75 : collect_all_refs (const char *source_file)
5496 : {
5497 75 : collect_ada_namespace (global_namespace, source_file);
5498 75 : }
5499 :
5500 : /* Clear DECL_EXTERNAL for NODE. */
5501 :
5502 : static bool
5503 172659937 : clear_decl_external (struct cgraph_node *node, void * /*data*/)
5504 : {
5505 172659937 : DECL_EXTERNAL (node->decl) = 0;
5506 172659937 : return false;
5507 : }
5508 :
5509 : /* Build up the function to run dynamic initializers for thread_local
5510 : variables in this translation unit and alias the init functions for the
5511 : individual variables to it. */
5512 :
5513 : static void
5514 141086 : handle_tls_init (void)
5515 : {
5516 141086 : tree vars = prune_vars_needing_no_initialization (&tls_aggregates);
5517 141086 : if (vars == NULL_TREE)
5518 140963 : return;
5519 :
5520 123 : location_t loc = DECL_SOURCE_LOCATION (TREE_VALUE (vars));
5521 :
5522 123 : write_out_vars (vars);
5523 :
5524 123 : tree guard = build_decl (loc, VAR_DECL, get_identifier ("__tls_guard"),
5525 : boolean_type_node);
5526 123 : TREE_PUBLIC (guard) = false;
5527 123 : TREE_STATIC (guard) = true;
5528 123 : DECL_ARTIFICIAL (guard) = true;
5529 123 : DECL_IGNORED_P (guard) = true;
5530 123 : TREE_USED (guard) = true;
5531 123 : CP_DECL_THREAD_LOCAL_P (guard) = true;
5532 123 : set_decl_tls_model (guard, decl_default_tls_model (guard));
5533 123 : pushdecl_top_level_and_finish (guard, NULL_TREE);
5534 :
5535 123 : tree fn = get_local_tls_init_fn (loc);
5536 123 : start_preparsed_function (fn, NULL_TREE, SF_PRE_PARSED);
5537 123 : tree body = begin_function_body ();
5538 123 : tree if_stmt = begin_if_stmt ();
5539 123 : tree cond = cp_build_unary_op (TRUTH_NOT_EXPR, guard, false,
5540 : tf_warning_or_error);
5541 123 : finish_if_stmt_cond (cond, if_stmt);
5542 123 : finish_expr_stmt (cp_build_modify_expr (loc, guard, NOP_EXPR,
5543 : boolean_true_node,
5544 : tf_warning_or_error));
5545 123 : tree sl = NULL_TREE;
5546 123 : int save_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5547 123 : bool saw_nonbase = false;
5548 930 : for (; vars; vars = TREE_CHAIN (vars))
5549 : {
5550 807 : tree var = TREE_VALUE (vars);
5551 807 : tree init = TREE_PURPOSE (vars);
5552 807 : sl = decomp_handle_one_var (vars, sl, &saw_nonbase,
5553 : save_stmts_are_full_exprs_p);
5554 807 : one_static_initialization_or_destruction (/*initp=*/true, var, init,
5555 : false);
5556 :
5557 : /* Output init aliases even with -fno-extern-tls-init. */
5558 807 : if (TARGET_SUPPORTS_ALIASES && TREE_PUBLIC (var))
5559 : {
5560 708 : tree single_init_fn = get_tls_init_fn (var);
5561 708 : if (single_init_fn == NULL_TREE)
5562 0 : continue;
5563 708 : cgraph_node *alias
5564 708 : = cgraph_node::get_create (fn)->create_same_body_alias
5565 708 : (single_init_fn, fn);
5566 708 : gcc_assert (alias != NULL);
5567 : }
5568 : }
5569 123 : decomp_finalize_var_list (sl, save_stmts_are_full_exprs_p);
5570 :
5571 123 : finish_then_clause (if_stmt);
5572 123 : finish_if_stmt (if_stmt);
5573 123 : finish_function_body (body);
5574 123 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
5575 : }
5576 :
5577 : /* We're at the end of compilation, so generate any mangling aliases that
5578 : we've been saving up, if DECL is going to be output and ID2 isn't
5579 : already taken by another declaration. */
5580 :
5581 : static void
5582 25438 : generate_mangling_alias (tree decl, tree id2)
5583 : {
5584 25438 : struct cgraph_node *n = NULL;
5585 :
5586 25438 : if (TREE_CODE (decl) == FUNCTION_DECL)
5587 : {
5588 25384 : n = cgraph_node::get (decl);
5589 25384 : if (!n)
5590 : /* Don't create an alias to an unreferenced function. */
5591 : return;
5592 : }
5593 :
5594 25438 : tree *slot
5595 25438 : = mangled_decls->find_slot_with_hash (id2, IDENTIFIER_HASH_VALUE (id2),
5596 : INSERT);
5597 :
5598 : /* If there's a declaration already using this mangled name,
5599 : don't create a compatibility alias that conflicts. */
5600 25438 : if (*slot)
5601 : return;
5602 :
5603 25408 : tree alias = make_alias_for (decl, id2);
5604 25408 : *slot = alias;
5605 :
5606 25408 : DECL_IGNORED_P (alias) = 1;
5607 25408 : TREE_PUBLIC (alias) = TREE_PUBLIC (decl);
5608 25408 : DECL_VISIBILITY (alias) = DECL_VISIBILITY (decl);
5609 25408 : if (vague_linkage_p (decl))
5610 25290 : DECL_WEAK (alias) = 1;
5611 :
5612 25408 : if (n)
5613 25354 : n->create_same_body_alias (alias, decl);
5614 : else
5615 54 : varpool_node::create_extra_name_alias (alias, decl);
5616 : }
5617 :
5618 : /* Note that we might want to emit an alias with the symbol ID2 for DECL at
5619 : the end of translation, for compatibility across bugs in the mangling
5620 : implementation. */
5621 :
5622 : void
5623 25468 : note_mangling_alias (tree decl, tree id2)
5624 : {
5625 25468 : if (TARGET_SUPPORTS_ALIASES)
5626 : {
5627 25468 : if (!defer_mangling_aliases)
5628 17081 : generate_mangling_alias (decl, id2);
5629 : else
5630 : {
5631 8387 : vec_safe_push (mangling_aliases, decl);
5632 8387 : vec_safe_push (mangling_aliases, id2);
5633 : }
5634 : }
5635 25468 : }
5636 :
5637 : /* Emit all mangling aliases that were deferred up to this point. */
5638 :
5639 : void
5640 96437 : generate_mangling_aliases ()
5641 : {
5642 104794 : while (!vec_safe_is_empty (mangling_aliases))
5643 : {
5644 8357 : tree id2 = mangling_aliases->pop();
5645 8357 : tree decl = mangling_aliases->pop();
5646 8357 : generate_mangling_alias (decl, id2);
5647 : }
5648 96437 : defer_mangling_aliases = false;
5649 96437 : }
5650 :
5651 : /* Record a mangling of DECL, whose DECL_ASSEMBLER_NAME has just been
5652 : set. NEED_WARNING is true if we must warn about collisions. We do
5653 : this to spot changes in mangling that may require compatibility
5654 : aliases. */
5655 :
5656 : void
5657 93385008 : record_mangling (tree decl, bool need_warning)
5658 : {
5659 93385008 : if (!mangled_decls)
5660 74298 : mangled_decls = hash_table<mangled_decl_hash>::create_ggc (499);
5661 :
5662 93385008 : gcc_checking_assert (DECL_ASSEMBLER_NAME_SET_P (decl));
5663 93385008 : tree id = DECL_ASSEMBLER_NAME_RAW (decl);
5664 93385008 : tree *slot
5665 93385008 : = mangled_decls->find_slot_with_hash (id, IDENTIFIER_HASH_VALUE (id),
5666 : INSERT);
5667 :
5668 : /* If this is already an alias, cancel the alias, because the real
5669 : decl takes precedence. */
5670 93385008 : if (*slot && DECL_ARTIFICIAL (*slot) && DECL_IGNORED_P (*slot))
5671 : {
5672 27 : if (symtab_node *n = symtab_node::get (*slot))
5673 : {
5674 27 : if (n->cpp_implicit_alias)
5675 : /* Actually removing the node isn't safe if other code is already
5676 : holding a pointer to it, so just neutralize it. */
5677 27 : n->reset ();
5678 : }
5679 : else
5680 : /* analyze_functions might have already removed the alias from the
5681 : symbol table if it's internal. */
5682 0 : gcc_checking_assert (!TREE_PUBLIC (*slot));
5683 :
5684 27 : *slot = NULL_TREE;
5685 : }
5686 :
5687 93385008 : if (!*slot)
5688 93384805 : *slot = decl;
5689 203 : else if (need_warning)
5690 : {
5691 3 : auto_diagnostic_group d;
5692 3 : error_at (DECL_SOURCE_LOCATION (decl),
5693 : "mangling of %q#D as %qE conflicts with a previous mangle",
5694 : decl, id);
5695 3 : inform (DECL_SOURCE_LOCATION (*slot),
5696 : "previous mangling %q#D", *slot);
5697 3 : inform (DECL_SOURCE_LOCATION (decl),
5698 : "a later %<-fabi-version=%> (or =0)"
5699 : " avoids this error with a change in mangling");
5700 3 : *slot = decl;
5701 3 : }
5702 93385008 : }
5703 :
5704 : /* The mangled name of DECL is being forcibly changed to NAME. Remove
5705 : any existing knowledge of DECL's mangled name meaning DECL. */
5706 :
5707 : void
5708 281049788 : overwrite_mangling (tree decl, tree name)
5709 : {
5710 281049788 : if (tree id = DECL_ASSEMBLER_NAME_RAW (decl))
5711 221801 : if ((TREE_CODE (decl) == VAR_DECL
5712 221711 : || TREE_CODE (decl) == FUNCTION_DECL)
5713 221801 : && mangled_decls)
5714 430378 : if (tree *slot
5715 215189 : = mangled_decls->find_slot_with_hash (id, IDENTIFIER_HASH_VALUE (id),
5716 : NO_INSERT))
5717 131380 : if (*slot == decl)
5718 : {
5719 75 : mangled_decls->clear_slot (slot);
5720 :
5721 : /* If this is an alias, remove it from the symbol table. */
5722 75 : if (DECL_ARTIFICIAL (decl) && DECL_IGNORED_P (decl))
5723 0 : if (symtab_node *n = symtab_node::get (decl))
5724 0 : if (n->cpp_implicit_alias)
5725 0 : n->remove ();
5726 : }
5727 :
5728 281049788 : DECL_ASSEMBLER_NAME_RAW (decl) = name;
5729 281049788 : }
5730 :
5731 : /* The entire file is now complete. If requested, dump everything
5732 : to a file. */
5733 :
5734 : static void
5735 96534 : dump_tu (void)
5736 : {
5737 96534 : dump_flags_t flags;
5738 96534 : if (FILE *stream = dump_begin (raw_dump_id, &flags))
5739 : {
5740 6 : dump_node (global_namespace, flags & ~TDF_SLIM, stream);
5741 6 : dump_end (raw_dump_id, stream);
5742 : }
5743 96534 : }
5744 :
5745 : static location_t locus_at_end_of_parsing;
5746 :
5747 : /* Check the deallocation functions for CODE to see if we want to warn that
5748 : only one was defined. */
5749 :
5750 : static void
5751 1926 : maybe_warn_sized_delete (enum tree_code code)
5752 : {
5753 1926 : tree sized = NULL_TREE;
5754 1926 : tree unsized = NULL_TREE;
5755 :
5756 10552 : for (ovl_iterator iter (get_global_binding (ovl_op_identifier (false, code)));
5757 10552 : iter; ++iter)
5758 : {
5759 8626 : tree fn = *iter;
5760 : /* We're only interested in usual deallocation functions. */
5761 8626 : if (!usual_deallocation_fn_p (fn))
5762 938 : continue;
5763 7688 : if (FUNCTION_ARG_CHAIN (fn) == void_list_node)
5764 : unsized = fn;
5765 : else
5766 5762 : sized = fn;
5767 : }
5768 1926 : if (DECL_INITIAL (unsized) && !DECL_INITIAL (sized))
5769 6 : warning_at (DECL_SOURCE_LOCATION (unsized), OPT_Wsized_deallocation,
5770 : "the program should also define %qD", sized);
5771 1920 : else if (!DECL_INITIAL (unsized) && DECL_INITIAL (sized))
5772 4 : warning_at (DECL_SOURCE_LOCATION (sized), OPT_Wsized_deallocation,
5773 : "the program should also define %qD", unsized);
5774 1926 : }
5775 :
5776 : /* Check the global deallocation functions to see if we want to warn about
5777 : defining unsized without sized (or vice versa). */
5778 :
5779 : static void
5780 96437 : maybe_warn_sized_delete ()
5781 : {
5782 96437 : if (!flag_sized_deallocation || !warn_sized_deallocation)
5783 : return;
5784 963 : maybe_warn_sized_delete (DELETE_EXPR);
5785 963 : maybe_warn_sized_delete (VEC_DELETE_EXPR);
5786 : }
5787 :
5788 : /* Earlier we left PTRMEM_CST in variable initializers alone so that we could
5789 : look them up when evaluating non-type template parameters. Now we need to
5790 : lower them to something the back end can understand. */
5791 :
5792 : static void
5793 96437 : lower_var_init ()
5794 : {
5795 96437 : varpool_node *node;
5796 36639551 : FOR_EACH_VARIABLE (node)
5797 : {
5798 36543114 : tree d = node->decl;
5799 36543114 : if (tree init = DECL_INITIAL (d))
5800 34215981 : DECL_INITIAL (d) = cplus_expand_constant (init);
5801 : }
5802 96437 : }
5803 :
5804 : /* This routine is called at the end of compilation.
5805 : Its job is to create all the code needed to initialize and
5806 : destroy the global aggregates. We do the destruction
5807 : first, since that way we only need to reverse the decls once. */
5808 :
5809 : void
5810 96549 : c_parse_final_cleanups (void)
5811 : {
5812 96549 : size_t i;
5813 96549 : tree decl;
5814 :
5815 96549 : locus_at_end_of_parsing = input_location;
5816 : /* We're done parsing. */
5817 96549 : at_eof = 1;
5818 :
5819 : /* Bad parse errors. Just forget about it. */
5820 193098 : if (! global_bindings_p () || current_class_type
5821 193098 : || !vec_safe_is_empty (decl_namespace_list))
5822 100 : return;
5823 :
5824 : /* This is the point to write out a PCH if we're doing that.
5825 : In that case we do not want to do anything else. */
5826 96546 : if (pch_file)
5827 : {
5828 : /* Mangle all symbols at PCH creation time. */
5829 97 : symtab_node *node;
5830 49386 : FOR_EACH_SYMBOL (node)
5831 49289 : if (! is_a <varpool_node *> (node)
5832 16238 : || ! DECL_HARD_REGISTER (node->decl))
5833 49289 : DECL_ASSEMBLER_NAME (node->decl);
5834 97 : c_common_write_pch ();
5835 97 : dump_tu ();
5836 : /* Ensure even the callers don't try to finalize the CU. */
5837 97 : flag_syntax_only = 1;
5838 97 : return;
5839 : }
5840 :
5841 96449 : timevar_stop (TV_PHASE_PARSING);
5842 96449 : timevar_start (TV_PHASE_DEFERRED);
5843 :
5844 96449 : symtab->process_same_body_aliases ();
5845 :
5846 : /* Handle -fdump-ada-spec[-slim] */
5847 96449 : if (flag_dump_ada_spec || flag_dump_ada_spec_slim)
5848 : {
5849 75 : collect_source_ref (main_input_filename);
5850 75 : if (!flag_dump_ada_spec_slim)
5851 75 : collect_source_refs (global_namespace);
5852 :
5853 75 : dump_ada_specs (collect_all_refs, cpp_check);
5854 : }
5855 :
5856 : /* FIXME - huh? was input_line -= 1;*/
5857 :
5858 : /* We now have to write out all the stuff we put off writing out.
5859 : These include:
5860 :
5861 : o Template specializations that we have not yet instantiated,
5862 : but which are needed.
5863 : o Initialization and destruction for non-local objects with
5864 : static storage duration. (Local objects with static storage
5865 : duration are initialized when their scope is first entered,
5866 : and are cleaned up via atexit.)
5867 : o Virtual function tables.
5868 :
5869 : All of these may cause others to be needed. For example,
5870 : instantiating one function may cause another to be needed, and
5871 : generating the initializer for an object may cause templates to be
5872 : instantiated, etc., etc. */
5873 :
5874 96449 : emit_support_tinfos ();
5875 :
5876 : /* Track vtables we want to emit that refer to consteval functions. */
5877 96449 : auto_vec<tree> consteval_vtables;
5878 :
5879 96449 : int retries = 0;
5880 96449 : unsigned ssdf_count = 0, omp_ssdf_count = 0;
5881 238430 : for (bool reconsider = true; reconsider; retries++)
5882 : {
5883 141993 : reconsider = false;
5884 :
5885 : /* If there are templates that we've put off instantiating, do
5886 : them now. */
5887 141993 : instantiate_pending_templates (retries);
5888 141981 : ggc_collect ();
5889 :
5890 141981 : if (header_module_p ())
5891 : /* A header modules initializations are handled in its
5892 : importer. */
5893 895 : continue;
5894 :
5895 : /* Emit wrappers where needed, and if that causes more to be added then
5896 : make sure we account for possible additional instantiations. */
5897 141086 : if (flag_contracts)
5898 28770 : if (emit_contract_wrapper_func (/*done*/false))
5899 141086 : reconsider = true;
5900 :
5901 : /* Write out virtual tables as required. Writing out the
5902 : virtual table for a template class may cause the
5903 : instantiation of members of that class. If we write out
5904 : vtables then we remove the class from our list so we don't
5905 : have to look at it again. */
5906 141086 : tree t;
5907 141086 : for (i = keyed_classes->length ();
5908 3794615 : keyed_classes->iterate (--i, &t);)
5909 3653529 : if (maybe_emit_vtables (t, consteval_vtables))
5910 : {
5911 402738 : reconsider = true;
5912 402738 : keyed_classes->unordered_remove (i);
5913 : }
5914 : /* The input_location may have been changed during marking of
5915 : vtable entries. */
5916 141086 : input_location = locus_at_end_of_parsing;
5917 :
5918 : /* Write out needed type info variables. We have to be careful
5919 : looping through unemitted decls, because emit_tinfo_decl may
5920 : cause other variables to be needed. New elements will be
5921 : appended, and we remove from the vector those that actually
5922 : get emitted. */
5923 141086 : for (i = unemitted_tinfo_decls->length ();
5924 5977274 : unemitted_tinfo_decls->iterate (--i, &t);)
5925 5836188 : if (DECL_INITIAL (t) || emit_tinfo_decl (t))
5926 : {
5927 486606 : reconsider = true;
5928 486606 : unemitted_tinfo_decls->unordered_remove (i);
5929 : }
5930 :
5931 : /* The list of objects with static storage duration is built up
5932 : in reverse order. We clear STATIC_AGGREGATES so that any new
5933 : aggregates added during the initialization of these will be
5934 : initialized in the correct order when we next come around the
5935 : loop. */
5936 141086 : if (tree vars = prune_vars_needing_no_initialization (&static_aggregates))
5937 : {
5938 5392 : if (flag_openmp)
5939 : /* Add initializer information from VARS into
5940 : DYNAMIC_INITIALIZERS. */
5941 394 : for (t = vars; t; t = TREE_CHAIN (t))
5942 566 : hash_map_safe_put<hm_ggc> (dynamic_initializers,
5943 283 : TREE_VALUE (t), TREE_PURPOSE (t));
5944 :
5945 : /* Make sure the back end knows about all the variables. */
5946 5392 : write_out_vars (vars);
5947 :
5948 5392 : function_depth++; // Disable GC
5949 5392 : priority_map_t *parts[4] = {nullptr, nullptr, nullptr, nullptr};
5950 5392 : partition_vars_for_init_fini (vars, parts);
5951 5392 : tree host_init_fini[2] = { NULL_TREE, NULL_TREE };
5952 :
5953 16176 : for (unsigned initp = 2; initp--;)
5954 10784 : if (parts[initp])
5955 16199 : for (auto iter : *parts[initp])
5956 : {
5957 5409 : auto list = iter.second;
5958 5409 : if (initp)
5959 : // Partitioning kept the vars in reverse order.
5960 : // We only want that for dtors.
5961 5400 : list = nreverse (list);
5962 5409 : host_init_fini[initp]
5963 5409 : = emit_partial_init_fini_fn (initp, iter.first, list,
5964 : ssdf_count++,
5965 : locus_at_end_of_parsing,
5966 : NULL_TREE);
5967 : }
5968 :
5969 5392 : if (flag_openmp)
5970 : {
5971 : priority_map_t **omp_parts = parts + 2;
5972 333 : for (unsigned initp = 2; initp--;)
5973 222 : if (omp_parts[initp])
5974 58 : for (auto iter : *omp_parts[initp])
5975 : {
5976 15 : auto list = iter.second;
5977 15 : if (initp)
5978 : // Partitioning kept the vars in reverse order.
5979 : // We only want that for dtors.
5980 15 : list = nreverse (list);
5981 15 : emit_partial_init_fini_fn (initp, iter.first, list,
5982 : omp_ssdf_count++,
5983 : locus_at_end_of_parsing,
5984 : host_init_fini[initp]);
5985 : }
5986 : }
5987 :
5988 5392 : function_depth--; // Re-enable GC
5989 :
5990 : /* All those initializations and finalizations might cause
5991 : us to need more inline functions, more template
5992 : instantiations, etc. */
5993 5392 : reconsider = true;
5994 : }
5995 :
5996 : /* Now do the same for thread_local variables. */
5997 141086 : handle_tls_init ();
5998 :
5999 : /* Go through the set of inline functions whose bodies have not
6000 : been emitted yet. If out-of-line copies of these functions
6001 : are required, emit them. */
6002 201726038 : FOR_EACH_VEC_SAFE_ELT (deferred_fns, i, decl)
6003 : {
6004 : /* Does it need synthesizing? */
6005 208092927 : if (DECL_DEFAULTED_FN (decl) && ! DECL_INITIAL (decl)
6006 201584958 : && (! DECL_REALLY_EXTERN (decl) || possibly_inlined_p (decl)))
6007 : {
6008 : /* Even though we're already at the top-level, we push
6009 : there again. That way, when we pop back a few lines
6010 : hence, all of our state is restored. Otherwise,
6011 : finish_function doesn't clean things up, and we end
6012 : up with CURRENT_FUNCTION_DECL set. */
6013 6 : push_to_top_level ();
6014 : /* The decl's location will mark where it was first
6015 : needed. Save that so synthesize method can indicate
6016 : where it was needed from, in case of error */
6017 6 : input_location = DECL_SOURCE_LOCATION (decl);
6018 6 : synthesize_method (decl);
6019 6 : pop_from_top_level ();
6020 6 : reconsider = true;
6021 : }
6022 :
6023 201584952 : if (!DECL_INITIAL (decl) && decl_tls_wrapper_p (decl))
6024 586 : generate_tls_wrapper (decl);
6025 :
6026 201584952 : if (!DECL_SAVED_TREE (decl))
6027 307593 : continue;
6028 :
6029 201277359 : cgraph_node *node = cgraph_node::get_create (decl);
6030 :
6031 : /* We lie to the back end, pretending that some functions
6032 : are not defined when they really are. This keeps these
6033 : functions from being put out unnecessarily. But, we must
6034 : stop lying when the functions are referenced, or if they
6035 : are not comdat since they need to be put out now. If
6036 : DECL_INTERFACE_KNOWN, then we have already set
6037 : DECL_EXTERNAL appropriately, so there's no need to check
6038 : again, and we do not want to clear DECL_EXTERNAL if a
6039 : previous call to import_export_decl set it.
6040 :
6041 : This is done in a separate for cycle, because if some
6042 : deferred function is contained in another deferred
6043 : function later in deferred_fns varray,
6044 : rest_of_compilation would skip this function and we
6045 : really cannot expand the same function twice. */
6046 201277359 : import_export_decl (decl);
6047 201277359 : if (DECL_NOT_REALLY_EXTERN (decl)
6048 197793400 : && DECL_INITIAL (decl)
6049 399070759 : && decl_needed_p (decl))
6050 : {
6051 137516632 : if (node->cpp_implicit_alias)
6052 12492878 : node = node->get_alias_target ();
6053 :
6054 137516632 : node->call_for_symbol_thunks_and_aliases (clear_decl_external,
6055 : NULL, true);
6056 : /* If we mark !DECL_EXTERNAL one of the symbols in some comdat
6057 : group, we need to mark all symbols in the same comdat group
6058 : that way. */
6059 137516632 : if (node->same_comdat_group)
6060 35121677 : for (cgraph_node *next
6061 17348778 : = dyn_cast<cgraph_node *> (node->same_comdat_group);
6062 35121677 : next != node;
6063 52894576 : next = dyn_cast<cgraph_node *> (next->same_comdat_group))
6064 17772899 : next->call_for_symbol_thunks_and_aliases (clear_decl_external,
6065 : NULL, true);
6066 : }
6067 :
6068 : /* If we're going to need to write this function out, and
6069 : there's already a body for it, create RTL for it now.
6070 : (There might be no body if this is a method we haven't
6071 : gotten around to synthesizing yet.) */
6072 201277359 : if (!DECL_EXTERNAL (decl)
6073 141559518 : && decl_needed_p (decl)
6074 139127183 : && !TREE_ASM_WRITTEN (decl)
6075 258082752 : && !DECL_IMMEDIATE_FUNCTION_P (decl)
6076 322327291 : && !node->definition)
6077 : {
6078 : /* We will output the function; no longer consider it in this
6079 : loop. */
6080 0 : DECL_DEFER_OUTPUT (decl) = 0;
6081 : /* Generate RTL for this function now that we know we
6082 : need it. */
6083 0 : expand_or_defer_fn (decl);
6084 0 : reconsider = true;
6085 : }
6086 : }
6087 :
6088 141086 : if (wrapup_namespace_globals ())
6089 534 : reconsider = true;
6090 :
6091 : /* Static data members are just like namespace-scope globals. */
6092 110445622 : FOR_EACH_VEC_SAFE_ELT (pending_statics, i, decl)
6093 : {
6094 201840589 : if (consteval_only_p (decl)
6095 110304410 : || var_finalized_p (decl)
6096 29359475 : || DECL_REALLY_EXTERN (decl)
6097 : /* Don't write it out if we haven't seen a definition. */
6098 129079155 : || DECL_IN_AGGR_P (decl))
6099 91536053 : continue;
6100 18768483 : import_export_decl (decl);
6101 : /* If this static data member is needed, provide it to the
6102 : back end. */
6103 18768483 : if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
6104 18739785 : DECL_EXTERNAL (decl) = 0;
6105 : }
6106 :
6107 283067 : if (vec_safe_length (pending_statics) != 0
6108 112442 : && wrapup_global_declarations (pending_statics->address (),
6109 56221 : pending_statics->length ()))
6110 : reconsider = true;
6111 : }
6112 :
6113 96437 : if (flag_contracts)
6114 : {
6115 23336 : emit_contract_wrapper_func (/*done*/true);
6116 23336 : maybe_emit_violation_handler_wrappers ();
6117 : }
6118 :
6119 : /* All templates have been instantiated. */
6120 96437 : at_eof = 2;
6121 :
6122 96437 : void *module_cookie = finish_module_processing (parse_in);
6123 :
6124 96437 : lower_var_init ();
6125 :
6126 96437 : generate_mangling_aliases ();
6127 :
6128 : /* All used inline functions must have a definition at this point. */
6129 53619118 : FOR_EACH_VEC_SAFE_ELT (deferred_fns, i, decl)
6130 : {
6131 53522681 : if (/* Check online inline functions that were actually used. */
6132 89628398 : DECL_ODR_USED (decl) && DECL_DECLARED_INLINE_P (decl)
6133 : /* If the definition actually was available here, then the
6134 : fact that the function was not defined merely represents
6135 : that for some reason (use of a template repository,
6136 : #pragma interface, etc.) we decided not to emit the
6137 : definition here. */
6138 36104316 : && !DECL_INITIAL (decl)
6139 : /* A defaulted fn or TLS wrapper in a header module can be
6140 : synthesized on demand later. (In non-header modules we
6141 : should have synthesized it above.) */
6142 4396 : && !(header_module_p ()
6143 11 : && (DECL_DEFAULTED_FN (decl) || decl_tls_wrapper_p (decl)))
6144 : /* Metafunctions are never defined. */
6145 4390 : && !metafunction_p (decl)
6146 : /* Don't complain if the template was defined. */
6147 728 : && !(DECL_TEMPLOID_INSTANTIATION (decl)
6148 652 : && DECL_INITIAL (DECL_TEMPLATE_RESULT
6149 : (template_for_substitution (decl))))
6150 89628398 : && warning_at (DECL_SOURCE_LOCATION (decl), 0,
6151 : "inline function %qD used but never defined", decl))
6152 : /* Avoid a duplicate warning from check_global_declaration. */
6153 73 : suppress_warning (decl, OPT_Wunused);
6154 : }
6155 :
6156 : /* So must decls that use a type with no linkage. */
6157 756195 : FOR_EACH_VEC_SAFE_ELT (no_linkage_decls, i, decl)
6158 659758 : no_linkage_error (decl);
6159 :
6160 96437 : maybe_warn_sized_delete ();
6161 :
6162 : // Place the init fns in the right order. We need to do this now,
6163 : // so that any module init will go at the start.
6164 96437 : if (static_init_fini_fns[true])
6165 16163 : for (auto iter : *static_init_fini_fns[true])
6166 5397 : iter.second = nreverse (iter.second);
6167 :
6168 96437 : if (flag_openmp && static_init_fini_fns[2 + true])
6169 43 : for (auto iter : *static_init_fini_fns[2 + true])
6170 15 : iter.second = nreverse (iter.second);
6171 :
6172 : /* Now we've instantiated all templates. Now we can escalate the functions
6173 : we squirreled away earlier. */
6174 96437 : process_and_check_pending_immediate_escalating_fns ();
6175 :
6176 : /* Then, do the Objective-C stuff. This is where all the
6177 : Objective-C module stuff gets generated (symtab,
6178 : class/protocol/selector lists etc). This must be done after C++
6179 : templates, destructors etc. so that selectors used in C++
6180 : templates are properly allocated. */
6181 96437 : if (c_dialect_objc ())
6182 0 : objc_write_global_declarations ();
6183 :
6184 96437 : bool has_module_inits = module_determine_import_inits ();
6185 96437 : bool has_objc_init = c_dialect_objc () && objc_static_init_needed_p ();
6186 96437 : if (has_module_inits || has_objc_init)
6187 : {
6188 46 : input_location = locus_at_end_of_parsing;
6189 46 : tree body = start_partial_init_fini_fn (true, DEFAULT_INIT_PRIORITY,
6190 : ssdf_count++, false);
6191 : /* For Objective-C++, we may need to initialize metadata found
6192 : in this module. This must be done _before_ any other static
6193 : initializations. */
6194 46 : if (has_objc_init)
6195 0 : objc_generate_static_init_call (NULL_TREE);
6196 46 : if (has_module_inits)
6197 46 : module_add_import_initializers ();
6198 46 : input_location = locus_at_end_of_parsing;
6199 46 : finish_partial_init_fini_fn (body);
6200 : }
6201 :
6202 96437 : if (module_global_init_needed ())
6203 : {
6204 : // Make sure there's a default priority entry.
6205 1937 : if (!static_init_fini_fns[true])
6206 1873 : static_init_fini_fns[true] = priority_map_t::create_ggc ();
6207 1937 : if (static_init_fini_fns[true]->get_or_insert (DEFAULT_INIT_PRIORITY))
6208 96437 : has_module_inits = true;
6209 :
6210 : /* FIXME: We need to work out what static constructors on OpenMP offload
6211 : target in modules will look like. */
6212 : }
6213 :
6214 : /* Generate initialization and destruction functions for all
6215 : priorities for which they are required. They have C-language
6216 : linkage. */
6217 96437 : push_lang_context (lang_name_c);
6218 482185 : for (unsigned initp = 4; initp--;)
6219 385748 : if (static_init_fini_fns[initp])
6220 : {
6221 14641 : for (auto iter : *static_init_fini_fns[initp])
6222 7328 : generate_ctor_or_dtor_function (initp & 1, iter.first, iter.second,
6223 : locus_at_end_of_parsing,
6224 7328 : (initp & 2) != 0);
6225 7313 : static_init_fini_fns[initp] = nullptr;
6226 : }
6227 96437 : pop_lang_context ();
6228 :
6229 96437 : fini_modules (parse_in, module_cookie, has_module_inits);
6230 :
6231 : /* Generate any missing aliases. */
6232 96437 : maybe_apply_pending_pragma_weaks ();
6233 :
6234 96437 : if (flag_vtable_verify)
6235 : {
6236 9 : vtv_recover_class_info ();
6237 9 : vtv_compute_class_hierarchy_transitive_closure ();
6238 9 : vtv_build_vtable_verify_fndecl ();
6239 : }
6240 :
6241 96437 : perform_deferred_noexcept_checks ();
6242 :
6243 96437 : fini_constexpr ();
6244 96437 : cp_tree_c_finish_parsing ();
6245 96437 : clear_consteval_vfns (consteval_vtables);
6246 :
6247 : /* The entire file is now complete. If requested, dump everything
6248 : to a file. */
6249 96437 : dump_tu ();
6250 :
6251 96437 : if (flag_detailed_statistics)
6252 : {
6253 0 : dump_tree_statistics ();
6254 0 : dump_time_statistics ();
6255 : }
6256 :
6257 96437 : timevar_stop (TV_PHASE_DEFERRED);
6258 96437 : timevar_start (TV_PHASE_PARSING);
6259 :
6260 : /* Indicate that we're done with front end processing. */
6261 96437 : at_eof = 3;
6262 96437 : }
6263 :
6264 : /* Perform any post compilation-proper cleanups for the C++ front-end.
6265 : This should really go away. No front-end should need to do
6266 : anything past the compilation process. */
6267 :
6268 : void
6269 96195 : cxx_post_compilation_parsing_cleanups (void)
6270 : {
6271 96195 : timevar_start (TV_PHASE_LATE_PARSING_CLEANUPS);
6272 :
6273 96195 : if (flag_vtable_verify)
6274 : {
6275 : /* Generate the special constructor initialization function that
6276 : calls __VLTRegisterPairs, and give it a very high
6277 : initialization priority. This must be done after
6278 : finalize_compilation_unit so that we have accurate
6279 : information about which vtable will actually be emitted. */
6280 9 : vtv_generate_init_routine ();
6281 : }
6282 :
6283 96195 : input_location = locus_at_end_of_parsing;
6284 :
6285 96195 : if (flag_checking)
6286 96186 : validate_conversion_obstack ();
6287 :
6288 96195 : timevar_stop (TV_PHASE_LATE_PARSING_CLEANUPS);
6289 96195 : }
6290 :
6291 : /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
6292 : function to call in parse-tree form; it has not yet been
6293 : semantically analyzed. ARGS are the arguments to the function.
6294 : They have already been semantically analyzed. This may change
6295 : ARGS. */
6296 :
6297 : tree
6298 349431 : build_offset_ref_call_from_tree (tree fn, vec<tree, va_gc> **args,
6299 : tsubst_flags_t complain)
6300 : {
6301 349431 : tree orig_fn;
6302 349431 : vec<tree, va_gc> *orig_args = NULL;
6303 349431 : tree expr;
6304 349431 : tree object;
6305 :
6306 349431 : orig_fn = fn;
6307 349431 : object = TREE_OPERAND (fn, 0);
6308 :
6309 349431 : if (processing_template_decl)
6310 : {
6311 266453 : gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
6312 : || TREE_CODE (fn) == MEMBER_REF);
6313 266453 : if (type_dependent_expression_p (fn)
6314 266453 : || any_type_dependent_arguments_p (*args))
6315 266414 : return build_min_nt_call_vec (fn, *args);
6316 :
6317 39 : orig_args = make_tree_vector_copy (*args);
6318 :
6319 : /* Transform the arguments and add the implicit "this"
6320 : parameter. */
6321 39 : if (TREE_CODE (TREE_TYPE (fn)) == METHOD_TYPE)
6322 : {
6323 33 : if (TREE_CODE (fn) == DOTSTAR_EXPR)
6324 27 : object = cp_build_addr_expr (object, complain);
6325 33 : vec_safe_insert (*args, 0, object);
6326 : }
6327 : }
6328 :
6329 : /* A qualified name corresponding to a bound pointer-to-member is
6330 : represented as an OFFSET_REF:
6331 :
6332 : struct B { void g(); };
6333 : void (B::*p)();
6334 : void B::g() { (this->*p)(); } */
6335 83017 : if (TREE_CODE (fn) == OFFSET_REF)
6336 : {
6337 82978 : tree object_addr = cp_build_addr_expr (object, complain);
6338 82978 : fn = TREE_OPERAND (fn, 1);
6339 82978 : fn = get_member_function_from_ptrfunc (&object_addr, fn,
6340 : complain);
6341 82978 : vec_safe_insert (*args, 0, object_addr);
6342 : }
6343 :
6344 83017 : if (CLASS_TYPE_P (TREE_TYPE (fn)))
6345 3 : expr = build_op_call (fn, args, complain);
6346 : else
6347 83014 : expr = cp_build_function_call_vec (fn, args, complain);
6348 83017 : if (processing_template_decl && expr != error_mark_node)
6349 39 : expr = build_min_non_dep_call_vec (expr, orig_fn, orig_args);
6350 :
6351 83017 : if (orig_args != NULL)
6352 39 : release_tree_vector (orig_args);
6353 :
6354 : return expr;
6355 : }
6356 :
6357 :
6358 : void
6359 357814931 : check_default_args (tree x)
6360 : {
6361 357814931 : tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
6362 357814931 : bool saw_def = false;
6363 357814931 : bool noted_first_def = false;
6364 357814931 : int idx_of_first_default_arg = 0;
6365 357814931 : location_t loc_of_first_default_arg = UNKNOWN_LOCATION;
6366 357814931 : int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
6367 357814931 : tree fndecl = STRIP_TEMPLATE (x);
6368 357814931 : auto_diagnostic_group d;
6369 975998295 : for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
6370 : {
6371 618183364 : if (TREE_PURPOSE (arg))
6372 : {
6373 11328149 : if (!saw_def)
6374 : {
6375 8488468 : saw_def = true;
6376 8488468 : idx_of_first_default_arg = i;
6377 8488468 : location_t loc = get_fndecl_argument_location (fndecl, i);
6378 8488468 : if (loc != DECL_SOURCE_LOCATION (x))
6379 8488440 : loc_of_first_default_arg = loc;
6380 : }
6381 : }
6382 606855215 : else if (saw_def && !PACK_EXPANSION_P (TREE_VALUE (arg)))
6383 : {
6384 147 : error_at (get_fndecl_argument_location (fndecl, i),
6385 : "default argument missing for parameter %P of %q#D", i, x);
6386 147 : if (loc_of_first_default_arg != UNKNOWN_LOCATION
6387 147 : && !noted_first_def)
6388 : {
6389 144 : inform (loc_of_first_default_arg,
6390 : "...following parameter %P which has a default argument",
6391 : idx_of_first_default_arg);
6392 144 : noted_first_def = true;
6393 : }
6394 147 : TREE_PURPOSE (arg) = error_mark_node;
6395 : }
6396 : }
6397 357814931 : }
6398 :
6399 : /* Return true if function DECL can be inlined. This is used to force
6400 : instantiation of methods that might be interesting for inlining. */
6401 : bool
6402 3 : possibly_inlined_p (tree decl)
6403 : {
6404 3 : gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
6405 3 : if (DECL_UNINLINABLE (decl))
6406 : return false;
6407 3 : if (!optimize)
6408 3 : return DECL_DECLARED_INLINE_P (decl);
6409 : /* When optimizing, we might inline everything when flatten
6410 : attribute or heuristics inlining for size or autoinlining
6411 : is used. */
6412 : return true;
6413 : }
6414 :
6415 : /* If DECL is a function or variable template specialization, instantiate
6416 : its definition now. */
6417 :
6418 : void
6419 195727602 : maybe_instantiate_decl (tree decl)
6420 : {
6421 1651328 : if (VAR_OR_FUNCTION_DECL_P (decl)
6422 195727602 : && DECL_LANG_SPECIFIC (decl)
6423 153284442 : && DECL_TEMPLATE_INFO (decl)
6424 320859841 : && !uses_template_parms (DECL_TI_ARGS (decl)))
6425 : {
6426 : /* Instantiating a function will result in garbage collection. We
6427 : must treat this situation as if we were within the body of a
6428 : function so as to avoid collecting live data only referenced from
6429 : the stack (such as overload resolution candidates). */
6430 120798875 : ++function_depth;
6431 120798875 : instantiate_decl (decl, /*defer_ok=*/false,
6432 : /*expl_inst_class_mem_p=*/false);
6433 120796178 : --function_depth;
6434 : }
6435 195724905 : }
6436 :
6437 : /* Error if the DECL is unavailable (unless this is currently suppressed).
6438 : Maybe warn if DECL is deprecated, subject to COMPLAIN. Returns true if
6439 : an error or warning was emitted. */
6440 :
6441 : bool
6442 4256249228 : cp_handle_deprecated_or_unavailable (tree decl, tsubst_flags_t complain)
6443 : {
6444 4256249228 : if (!decl)
6445 : return false;
6446 :
6447 4218593056 : if ((complain & tf_error)
6448 3739261233 : && deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
6449 : {
6450 3031266493 : if (TREE_UNAVAILABLE (decl))
6451 : {
6452 252 : error_unavailable_use (decl, NULL_TREE);
6453 252 : return true;
6454 : }
6455 : else
6456 : {
6457 : /* Perhaps this is an unavailable typedef. */
6458 3031266241 : if (TYPE_P (decl)
6459 766815047 : && TYPE_NAME (decl)
6460 3792099674 : && TREE_UNAVAILABLE (TYPE_NAME (decl)))
6461 : {
6462 6 : decl = TYPE_NAME (decl);
6463 : /* Don't error within members of a unavailable type. */
6464 6 : if (TYPE_P (decl)
6465 6 : && currently_open_class (decl))
6466 : return false;
6467 :
6468 6 : error_unavailable_use (decl, NULL_TREE);
6469 6 : return true;
6470 : }
6471 : }
6472 : /* Carry on to consider deprecatedness. */
6473 : }
6474 :
6475 4218592798 : if (!(complain & tf_warning)
6476 3691954152 : || deprecated_state == DEPRECATED_SUPPRESS
6477 3689893469 : || deprecated_state == UNAVAILABLE_DEPRECATED_SUPPRESS)
6478 : return false;
6479 :
6480 2987849942 : if (!TREE_DEPRECATED (decl))
6481 : {
6482 : /* Perhaps this is a deprecated typedef. */
6483 2987337812 : if (TYPE_P (decl) && TYPE_NAME (decl))
6484 759610623 : decl = TYPE_NAME (decl);
6485 :
6486 2987337812 : if (!TREE_DEPRECATED (decl))
6487 : return false;
6488 : }
6489 :
6490 : /* Don't warn within members of a deprecated type. */
6491 512138 : if (TYPE_P (decl)
6492 512138 : && currently_open_class (decl))
6493 : return false;
6494 :
6495 42180 : bool warned = false;
6496 42180 : if (cxx_dialect >= cxx11
6497 42089 : && DECL_P (decl)
6498 41998 : && DECL_ARTIFICIAL (decl)
6499 19428 : && DECL_IOBJ_MEMBER_FUNCTION_P (decl)
6500 61608 : && copy_fn_p (decl))
6501 : {
6502 : /* Don't warn if the flag was disabled around the class definition
6503 : (c++/94492). */
6504 19416 : if (warning_enabled_at (DECL_SOURCE_LOCATION (decl),
6505 19416 : OPT_Wdeprecated_copy))
6506 : {
6507 16 : auto_diagnostic_group d;
6508 16 : tree ctx = DECL_CONTEXT (decl);
6509 16 : tree other = classtype_has_depr_implicit_copy (ctx);
6510 16 : int opt = (DECL_DESTRUCTOR_P (other)
6511 16 : ? OPT_Wdeprecated_copy_dtor
6512 0 : : OPT_Wdeprecated_copy);
6513 16 : warned = warning (opt, "implicitly-declared %qD is deprecated",
6514 : decl);
6515 16 : if (warned)
6516 4 : inform (DECL_SOURCE_LOCATION (other),
6517 : "because %qT has user-provided %qD",
6518 : ctx, other);
6519 16 : }
6520 : }
6521 : else
6522 : {
6523 22764 : if (!warning_suppressed_at (input_location,
6524 : OPT_Wdeprecated_declarations))
6525 19935 : warned = warn_deprecated_use (decl, NULL_TREE);
6526 22764 : suppress_warning_at (input_location, OPT_Wdeprecated_declarations);
6527 : }
6528 :
6529 : return warned;
6530 : }
6531 :
6532 : /* Like above, but takes into account outer scopes. */
6533 :
6534 : void
6535 1473181556 : cp_warn_deprecated_use_scopes (tree scope)
6536 : {
6537 1473181556 : while (scope
6538 2583649425 : && scope != error_mark_node
6539 5167298815 : && scope != global_namespace)
6540 : {
6541 246761345 : if ((TREE_CODE (scope) == NAMESPACE_DECL || OVERLOAD_TYPE_P (scope))
6542 1341000043 : && cp_handle_deprecated_or_unavailable (scope))
6543 : return;
6544 1110467869 : if (TYPE_P (scope))
6545 232216869 : scope = CP_TYPE_CONTEXT (scope);
6546 : else
6547 878251000 : scope = CP_DECL_CONTEXT (scope);
6548 : }
6549 : }
6550 :
6551 : /* True if DECL or its enclosing scope have unbound template parameters. */
6552 :
6553 : bool
6554 596591348 : decl_dependent_p (tree decl)
6555 : {
6556 596591348 : tree orig_decl = decl;
6557 1192519945 : if (DECL_FUNCTION_SCOPE_P (decl)
6558 294866968 : || TREE_CODE (decl) == CONST_DECL
6559 294866968 : || TREE_CODE (decl) == USING_DECL
6560 891458316 : || TREE_CODE (decl) == FIELD_DECL)
6561 301724380 : decl = CP_DECL_CONTEXT (decl);
6562 596591348 : if (tree tinfo = get_template_info (decl))
6563 527754067 : if (any_dependent_template_arguments_p (TI_ARGS (tinfo)))
6564 : return true;
6565 434606592 : if (LAMBDA_FUNCTION_P (decl)
6566 432446147 : && dependent_type_p (DECL_CONTEXT (decl)))
6567 : return true;
6568 : /* for-range-declaration of expansion statement as well as variable
6569 : declarations in the expansion statement body when the expansion statement
6570 : is not inside a template still need to be treated as dependent during
6571 : parsing. When the body is instantiated, in_expansion_stmt will be already
6572 : false. */
6573 427090166 : if (VAR_P (orig_decl) && in_expansion_stmt && decl == current_function_decl)
6574 : return true;
6575 : return false;
6576 : }
6577 :
6578 : /* [basic.def.odr] A function is named [and therefore odr-used] by an
6579 : expression or conversion if it is the selected member of an overload set in
6580 : an overload resolution performed as part of forming that expression or
6581 : conversion, unless it is a pure virtual function and either the expression
6582 : is not an id-expression naming the function with an explicitly qualified
6583 : name or the expression forms a pointer to member.
6584 :
6585 : Mostly, we call mark_used in places that actually do something with a
6586 : function, like build_over_call. But in a few places we end up with a
6587 : non-overloaded FUNCTION_DECL that we aren't going to do any more with, like
6588 : convert_to_void. resolve_nondeduced_context is called in those places,
6589 : but it's also called in too many other places. */
6590 :
6591 : bool
6592 610265523 : mark_single_function (tree expr, tsubst_flags_t complain)
6593 : {
6594 610265523 : expr = maybe_undo_parenthesized_ref (expr);
6595 610265523 : expr = tree_strip_any_location_wrapper (expr);
6596 :
6597 610265523 : if (expr == error_mark_node)
6598 : return false;
6599 :
6600 610264876 : if (is_overloaded_fn (expr) == 1
6601 158737099 : && !mark_used (expr, complain)
6602 610264912 : && !(complain & tf_error))
6603 : return false;
6604 : return true;
6605 : }
6606 :
6607 : /* True iff we have started, but not finished, defining FUNCTION_DECL DECL. */
6608 :
6609 : bool
6610 133111370 : fn_being_defined (tree decl)
6611 : {
6612 : /* DECL_INITIAL is set to error_mark_node in grokfndecl for a definition, and
6613 : changed to BLOCK by poplevel at the end of the function. */
6614 133111370 : return (TREE_CODE (decl) == FUNCTION_DECL
6615 133111370 : && DECL_INITIAL (decl) == error_mark_node);
6616 : }
6617 :
6618 : /* True if DECL is an instantiation of a function template currently being
6619 : defined. */
6620 :
6621 : bool
6622 427089765 : fn_template_being_defined (tree decl)
6623 : {
6624 427089765 : if (TREE_CODE (decl) != FUNCTION_DECL
6625 220428178 : || !DECL_LANG_SPECIFIC (decl)
6626 220428178 : || !DECL_TEMPLOID_INSTANTIATION (decl)
6627 621232168 : || DECL_TEMPLATE_INSTANTIATED (decl))
6628 : return false;
6629 133111370 : tree tinfo = DECL_TEMPLATE_INFO (decl);
6630 133111370 : tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
6631 133111370 : return fn_being_defined (pattern);
6632 : }
6633 :
6634 : /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
6635 : If DECL is a specialization or implicitly declared class member,
6636 : generate the actual definition. Return false if something goes
6637 : wrong, true otherwise. */
6638 :
6639 : bool
6640 1602937276 : mark_used (tree decl, tsubst_flags_t complain /* = tf_warning_or_error */)
6641 : {
6642 1602937276 : if (decl == error_mark_node)
6643 : return false;
6644 :
6645 : /* If we're just testing conversions or resolving overloads, we
6646 : don't want any permanent effects like forcing functions to be
6647 : output or instantiating templates. */
6648 1602937186 : if ((complain & tf_conv))
6649 : return true;
6650 :
6651 : /* If DECL is a BASELINK for a single function, then treat it just
6652 : like the DECL for the function. Otherwise, if the BASELINK is
6653 : for an overloaded function, we don't know which function was
6654 : actually used until after overload resolution. */
6655 1602917454 : if (BASELINK_P (decl))
6656 : {
6657 10902 : tree fns = BASELINK_FUNCTIONS (decl);
6658 10902 : if (really_overloaded_fn (fns))
6659 : return true;
6660 10860 : fns = OVL_FIRST (fns);
6661 10860 : if (!mark_used (fns, complain))
6662 : return false;
6663 : /* We might have deduced its return type. */
6664 10848 : TREE_TYPE (decl) = TREE_TYPE (fns);
6665 10848 : return true;
6666 : }
6667 :
6668 1602906552 : if (!DECL_P (decl))
6669 : return true;
6670 :
6671 : /* Set TREE_USED for the benefit of -Wunused. */
6672 1601944185 : TREE_USED (decl) = true;
6673 :
6674 : /* And for structured bindings also the underlying decl. */
6675 1601944185 : if (DECL_DECOMPOSITION_P (decl) && !DECL_DECOMP_IS_BASE (decl))
6676 1039091 : TREE_USED (DECL_DECOMP_BASE (decl)) = true;
6677 :
6678 1601944185 : if (TREE_CODE (decl) == TEMPLATE_DECL)
6679 : return true;
6680 :
6681 1601932877 : if (DECL_CLONED_FUNCTION_P (decl))
6682 24881608 : TREE_USED (DECL_CLONED_FUNCTION (decl)) = 1;
6683 :
6684 : /* Mark enumeration types as used. */
6685 1601932877 : if (TREE_CODE (decl) == CONST_DECL)
6686 41183990 : used_types_insert (DECL_CONTEXT (decl));
6687 :
6688 1601932877 : if (TREE_CODE (decl) == FUNCTION_DECL)
6689 : {
6690 415591893 : if (DECL_MAYBE_DELETED (decl))
6691 : {
6692 32790 : ++function_depth;
6693 32790 : maybe_synthesize_method (decl);
6694 32790 : --function_depth;
6695 : }
6696 :
6697 415591893 : if (DECL_DELETED_FN (decl))
6698 : {
6699 2403 : if (DECL_ARTIFICIAL (decl)
6700 1631 : && DECL_CONV_FN_P (decl)
6701 2415 : && LAMBDA_TYPE_P (DECL_CONTEXT (decl)))
6702 : /* We mark a lambda conversion op as deleted if we can't
6703 : generate it properly; see maybe_add_lambda_conv_op. */
6704 6 : sorry ("converting lambda that uses %<...%> to function pointer");
6705 2397 : else if (complain & tf_error)
6706 : {
6707 2379 : auto_diagnostic_group d;
6708 2379 : if (DECL_INITIAL (decl)
6709 2379 : && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST)
6710 : {
6711 23 : escaped_string msg;
6712 23 : msg.escape (TREE_STRING_POINTER (DECL_INITIAL (decl)));
6713 23 : error ("use of deleted function %qD: %s",
6714 : decl, (const char *) msg);
6715 23 : }
6716 : else
6717 2356 : error ("use of deleted function %qD", decl);
6718 2379 : if (!maybe_explain_implicit_delete (decl))
6719 661 : inform (DECL_SOURCE_LOCATION (decl), "declared here");
6720 2379 : }
6721 2403 : return false;
6722 : }
6723 :
6724 415589490 : if (!maybe_instantiate_noexcept (decl, complain))
6725 : return false;
6726 : }
6727 :
6728 1601930378 : if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_LOCAL_DECL_P (decl))
6729 : {
6730 69169 : if (!DECL_LANG_SPECIFIC (decl))
6731 : /* An unresolved dependent local extern. */
6732 : return true;
6733 :
6734 69169 : DECL_ODR_USED (decl) = 1;
6735 69169 : auto alias = DECL_LOCAL_DECL_ALIAS (decl);
6736 69169 : if (!alias || alias == error_mark_node)
6737 : return true;
6738 :
6739 : /* Process the underlying decl. */
6740 68877 : decl = alias;
6741 68877 : TREE_USED (decl) = true;
6742 : }
6743 :
6744 1601930086 : cp_handle_deprecated_or_unavailable (decl, complain);
6745 :
6746 : /* We can only check DECL_ODR_USED on variables or functions with
6747 : DECL_LANG_SPECIFIC set, and these are also the only decls that we
6748 : might need special handling for. */
6749 939445037 : if (!VAR_OR_FUNCTION_DECL_P (decl)
6750 2017519458 : || DECL_THUNK_P (decl))
6751 : return true;
6752 :
6753 : /* We only want to do this processing once. We don't need to keep trying
6754 : to instantiate inline templates, because unit-at-a-time will make sure
6755 : we get them compiled before functions that want to inline them. */
6756 1078066013 : if (DECL_LANG_SPECIFIC (decl) && DECL_ODR_USED (decl))
6757 : return true;
6758 :
6759 590853949 : if (flag_concepts && TREE_CODE (decl) == FUNCTION_DECL
6760 816465042 : && !constraints_satisfied_p (decl))
6761 : {
6762 15 : if (complain & tf_error)
6763 : {
6764 6 : auto_diagnostic_group d;
6765 6 : error ("use of function %qD with unsatisfied constraints",
6766 : decl);
6767 6 : location_t loc = DECL_SOURCE_LOCATION (decl);
6768 6 : inform (loc, "declared here");
6769 6 : diagnose_constraints (loc, decl, NULL_TREE);
6770 6 : }
6771 15 : return false;
6772 : }
6773 :
6774 : /* If DECL has a deduced return type, we need to instantiate it now to
6775 : find out its type. For OpenMP user defined reductions, we need them
6776 : instantiated for reduction clauses which inline them by hand directly.
6777 : OpenMP declared mappers are used implicitly so must be instantiated
6778 : before they can be detected. */
6779 596591348 : if (undeduced_auto_decl (decl)
6780 568796503 : || (VAR_P (decl)
6781 349237751 : && VAR_HAD_UNKNOWN_BOUND (decl))
6782 568777333 : || (TREE_CODE (decl) == FUNCTION_DECL
6783 219558752 : && DECL_OMP_DECLARE_REDUCTION_P (decl))
6784 1165368419 : || (TREE_CODE (decl) == VAR_DECL
6785 349218581 : && DECL_LANG_SPECIFIC (decl)
6786 83181978 : && DECL_OMP_DECLARE_MAPPER_P (decl)))
6787 27814352 : maybe_instantiate_decl (decl);
6788 :
6789 596591348 : if (!decl_dependent_p (decl)
6790 : /* Don't require this yet for an instantiation of a function template
6791 : we're currently defining (c++/120555). */
6792 427089765 : && !fn_template_being_defined (decl)
6793 1023561716 : && !require_deduced_type (decl, complain))
6794 : return false;
6795 :
6796 596590696 : if (DECL_LANG_SPECIFIC (decl) == NULL)
6797 : return true;
6798 :
6799 305083737 : if (processing_template_decl || in_template_context)
6800 : return true;
6801 :
6802 : /* Check this too in case we're within instantiate_non_dependent_expr. */
6803 251396222 : if (DECL_TEMPLATE_INFO (decl)
6804 251396222 : && uses_template_parms (DECL_TI_ARGS (decl)))
6805 : return true;
6806 :
6807 251396222 : if (builtin_pack_fn_p (decl))
6808 : {
6809 12 : error ("use of built-in parameter pack %qD outside of a template",
6810 6 : DECL_NAME (decl));
6811 6 : return false;
6812 : }
6813 :
6814 : /* If we don't need a value, then we don't need to synthesize DECL. */
6815 251396216 : if (cp_unevaluated_operand || in_discarded_stmt)
6816 : return true;
6817 :
6818 58401575 : DECL_ODR_USED (decl) = 1;
6819 58401575 : if (DECL_CLONED_FUNCTION_P (decl))
6820 8076550 : DECL_ODR_USED (DECL_CLONED_FUNCTION (decl)) = 1;
6821 :
6822 : /* DR 757: A type without linkage shall not be used as the type of a
6823 : variable or function with linkage, unless
6824 : o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
6825 : o the variable or function is not used (3.2 [basic.def.odr]) or is
6826 : defined in the same translation unit. */
6827 58401575 : if (cxx_dialect > cxx98
6828 58196759 : && decl_linkage (decl) != lk_none
6829 52867495 : && !DECL_EXTERN_C_P (decl)
6830 48393815 : && !DECL_ARTIFICIAL (decl)
6831 46441702 : && !decl_defined_p (decl)
6832 94201558 : && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
6833 659843 : vec_safe_push (no_linkage_decls, decl);
6834 :
6835 58401575 : if (TREE_CODE (decl) == FUNCTION_DECL
6836 43967278 : && DECL_DECLARED_INLINE_P (decl)
6837 35139854 : && !DECL_INITIAL (decl)
6838 24340817 : && !DECL_ARTIFICIAL (decl)
6839 82105477 : && !DECL_PURE_VIRTUAL_P (decl))
6840 : /* Remember it, so we can check it was defined. */
6841 23685588 : note_vague_linkage_fn (decl);
6842 :
6843 : /* Is it a synthesized method that needs to be synthesized? */
6844 58401575 : if (TREE_CODE (decl) == FUNCTION_DECL
6845 43967278 : && DECL_DEFAULTED_FN (decl)
6846 : /* A function defaulted outside the class is synthesized either by
6847 : cp_finish_decl or instantiate_decl. */
6848 1740999 : && !DECL_DEFAULTED_OUTSIDE_CLASS_P (decl)
6849 60142351 : && ! DECL_INITIAL (decl))
6850 : {
6851 : /* Remember the current location for a function we will end up
6852 : synthesizing. Then we can inform the user where it was
6853 : required in the case of error. */
6854 1530440 : if (decl_remember_implicit_trigger_p (decl))
6855 567893 : DECL_SOURCE_LOCATION (decl) = input_location;
6856 :
6857 : /* Synthesizing an implicitly defined member function will result in
6858 : garbage collection. We must treat this situation as if we were
6859 : within the body of a function so as to avoid collecting live data
6860 : on the stack (such as overload resolution candidates).
6861 :
6862 : We could just let c_parse_final_cleanups handle synthesizing
6863 : this function by adding it to deferred_fns, but doing
6864 : it at the use site produces better error messages. */
6865 1530440 : ++function_depth;
6866 1530440 : synthesize_method (decl);
6867 1530440 : --function_depth;
6868 : /* If this is a synthesized method we don't need to
6869 : do the instantiation test below. */
6870 : }
6871 42436838 : else if (VAR_OR_FUNCTION_DECL_P (decl)
6872 56871135 : && DECL_TEMPLATE_INFO (decl)
6873 93017473 : && (!DECL_EXPLICIT_INSTANTIATION (decl)
6874 519599 : || always_instantiate_p (decl)))
6875 : /* If this is a function or variable that is an instance of some
6876 : template, we now know that we will need to actually do the
6877 : instantiation. We check that DECL is not an explicit
6878 : instantiation because that is not checked in instantiate_decl.
6879 :
6880 : We put off instantiating functions in order to improve compile
6881 : times. Maintaining a stack of active functions is expensive,
6882 : and the inliner knows to instantiate any functions it might
6883 : need. Therefore, we always try to defer instantiation. */
6884 : {
6885 36086503 : ++function_depth;
6886 36086503 : instantiate_decl (decl, /*defer_ok=*/true,
6887 : /*expl_inst_class_mem_p=*/false);
6888 36078403 : --function_depth;
6889 : }
6890 :
6891 : return true;
6892 : }
6893 :
6894 : tree
6895 9 : vtv_start_verification_constructor_init_function (void)
6896 : {
6897 9 : return start_objects (/*initp=*/true, MAX_RESERVED_INIT_PRIORITY - 1, true);
6898 : }
6899 :
6900 : tree
6901 6 : vtv_finish_verification_constructor_init_function (tree body)
6902 : {
6903 6 : return finish_objects (/*initp=*/true, MAX_RESERVED_INIT_PRIORITY - 1, body);
6904 : }
6905 :
6906 : #include "gt-cp-decl2.h"
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