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 625821341 : static hashval_t hash (const value_type decl)
106 : {
107 625821341 : return IDENTIFIER_HASH_VALUE (DECL_ASSEMBLER_NAME_RAW (decl));
108 : }
109 605992596 : static bool equal (const value_type existing, compare_type candidate)
110 : {
111 605992596 : tree name = DECL_ASSEMBLER_NAME_RAW (existing);
112 605992596 : 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 795812274 : static bool is_deleted (value_type e)
120 : {
121 795812274 : 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 526675 : template <typename T> static bool is_empty (const T &entry)
153 : {
154 526675 : 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 deletable
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 105859225 : build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals,
197 : cp_ref_qualifier rqual)
198 : {
199 105859225 : if (fntype == error_mark_node || ctype == error_mark_node)
200 : return error_mark_node;
201 :
202 105859222 : gcc_assert (FUNC_OR_METHOD_TYPE_P (fntype));
203 :
204 105859222 : cp_cv_quals type_quals = quals & ~TYPE_QUAL_RESTRICT;
205 105859222 : ctype = cp_build_qualified_type (ctype, type_quals);
206 :
207 105859222 : tree newtype
208 105859222 : = build_method_type_directly (ctype, TREE_TYPE (fntype),
209 105859222 : (TREE_CODE (fntype) == METHOD_TYPE
210 60135 : ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
211 105799087 : : TYPE_ARG_TYPES (fntype)));
212 105859222 : if (tree attrs = TYPE_ATTRIBUTES (fntype))
213 71 : newtype = cp_build_type_attribute_variant (newtype, attrs);
214 317577666 : newtype = build_cp_fntype_variant (newtype, rqual,
215 105859222 : TYPE_RAISES_EXCEPTIONS (fntype),
216 105859222 : TYPE_HAS_LATE_RETURN_TYPE (fntype));
217 :
218 105859222 : 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 1061459 : change_return_type (tree new_ret, tree fntype)
226 : {
227 1061459 : if (new_ret == error_mark_node)
228 : return fntype;
229 :
230 1061459 : if (same_type_p (new_ret, TREE_TYPE (fntype)))
231 : return fntype;
232 :
233 1061456 : tree newtype;
234 1061456 : tree args = TYPE_ARG_TYPES (fntype);
235 :
236 1061456 : if (TREE_CODE (fntype) == FUNCTION_TYPE)
237 : {
238 963057 : newtype = build_function_type (new_ret, args,
239 321019 : TYPE_NO_NAMED_ARGS_STDARG_P (fntype));
240 321019 : newtype = apply_memfn_quals (newtype,
241 : type_memfn_quals (fntype));
242 : }
243 : else
244 740437 : newtype = build_method_type_directly
245 740437 : (class_of_this_parm (fntype), new_ret, TREE_CHAIN (args));
246 :
247 1061456 : if (tree attrs = TYPE_ATTRIBUTES (fntype))
248 92 : newtype = cp_build_type_attribute_variant (newtype, attrs);
249 1061456 : newtype = cxx_copy_lang_qualifiers (newtype, fntype);
250 :
251 1061456 : 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 565658507 : cp_build_parm_decl (tree fn, tree name, tree type)
259 : {
260 565658507 : tree parm = build_decl (input_location,
261 : PARM_DECL, name, type);
262 565658507 : 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 565658507 : if (!processing_template_decl)
267 195914142 : DECL_ARG_TYPE (parm) = type_passed_as (type);
268 :
269 565658507 : 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 245122782 : build_artificial_parm (tree fn, tree name, tree type)
277 : {
278 245122782 : tree parm = cp_build_parm_decl (fn, name, type);
279 245122782 : DECL_ARTIFICIAL (parm) = 1;
280 : /* All our artificial parms are implicitly `const'; they cannot be
281 : assigned to. */
282 245122782 : TREE_READONLY (parm) = 1;
283 245122782 : 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 83442410 : maybe_retrofit_in_chrg (tree fn)
298 : {
299 83442410 : tree basetype, arg_types, parms, parm, fntype;
300 :
301 : /* If we've already add the in-charge parameter don't do it again. */
302 83442410 : 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 83442410 : 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 53214499 : if (!CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
313 : return;
314 :
315 1157771 : arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
316 1157771 : basetype = TREE_TYPE (TREE_VALUE (arg_types));
317 1157771 : arg_types = TREE_CHAIN (arg_types);
318 :
319 1157771 : 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 1157771 : if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
324 : {
325 1157771 : 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 1157771 : DECL_CHAIN (parm) = parms;
329 1157771 : parms = parm;
330 :
331 : /* ...and then to TYPE_ARG_TYPES. */
332 1157771 : arg_types = hash_tree_chain (vtt_parm_type, arg_types);
333 :
334 1157771 : DECL_HAS_VTT_PARM_P (fn) = 1;
335 : }
336 :
337 : /* Then add the in-charge parm (before the VTT parm). */
338 1157771 : parm = build_artificial_parm (fn, in_charge_identifier, integer_type_node);
339 1157771 : DECL_CHAIN (parm) = parms;
340 1157771 : parms = parm;
341 1157771 : arg_types = hash_tree_chain (integer_type_node, arg_types);
342 :
343 : /* Insert our new parameter(s) into the list. */
344 1157771 : DECL_CHAIN (DECL_ARGUMENTS (fn)) = parms;
345 :
346 : /* And rebuild the function type. */
347 1157771 : fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
348 : arg_types);
349 1157771 : if (TYPE_ATTRIBUTES (TREE_TYPE (fn)))
350 3 : fntype = (cp_build_type_attribute_variant
351 3 : (fntype, TYPE_ATTRIBUTES (TREE_TYPE (fn))));
352 1157771 : fntype = cxx_copy_lang_qualifiers (fntype, TREE_TYPE (fn));
353 1157771 : TREE_TYPE (fn) = fntype;
354 :
355 : /* Now we've got the in-charge parameter. */
356 1157771 : 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 147779363 : grokclassfn (tree ctype, tree function, enum overload_flags flags)
381 : {
382 147779363 : 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 147779363 : SET_DECL_LANGUAGE (function, lang_cplusplus);
387 :
388 147779363 : 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 147779363 : DECL_CONTEXT (function) = ctype;
396 :
397 147779363 : if (flags == DTOR_FLAG)
398 11560056 : DECL_CXX_DESTRUCTOR_P (function) = 1;
399 :
400 283998670 : if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
401 55920577 : maybe_retrofit_in_chrg (function);
402 147779363 : }
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 11926116 : 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 11926116 : tree type;
414 11926116 : tree expr;
415 11926116 : tree orig_array_expr = array_expr;
416 11926116 : tree orig_index_exp = index_exp;
417 11916877 : vec<tree, va_gc> *orig_index_exp_list
418 11926116 : = index_exp_list ? *index_exp_list : NULL;
419 11926116 : tree overload = NULL_TREE;
420 :
421 11926116 : if (error_operand_p (array_expr) || error_operand_p (index_exp))
422 105 : return error_mark_node;
423 :
424 11926011 : if (processing_template_decl)
425 : {
426 10251572 : if (type_dependent_expression_p (array_expr)
427 10251605 : || (index_exp ? type_dependent_expression_p (index_exp)
428 33 : : any_type_dependent_arguments_p (*index_exp_list)))
429 : {
430 8465953 : if (index_exp == NULL)
431 10668 : index_exp = build_min_nt_call_vec (ovl_op_identifier (ARRAY_REF),
432 : *index_exp_list);
433 8465953 : return build_min_nt_loc (loc, ARRAY_REF, array_expr, index_exp,
434 8465953 : NULL_TREE, NULL_TREE);
435 : }
436 1785619 : if (!index_exp)
437 32 : orig_index_exp_list = make_tree_vector_copy (*index_exp_list);
438 : }
439 :
440 3460058 : type = TREE_TYPE (array_expr);
441 3460058 : gcc_assert (type);
442 3460058 : type = non_reference (type);
443 :
444 : /* If they have an `operator[]', use that. */
445 3460058 : if (MAYBE_CLASS_TYPE_P (type)
446 3241680 : || (index_exp && MAYBE_CLASS_TYPE_P (TREE_TYPE (index_exp)))
447 : || (index_exp == NULL_TREE
448 60 : && !(*index_exp_list)->is_empty ()
449 53 : && MAYBE_CLASS_TYPE_P (TREE_TYPE ((*index_exp_list)->last ()))))
450 : {
451 218420 : if (index_exp)
452 217717 : expr = build_new_op (loc, ARRAY_REF, LOOKUP_NORMAL, array_expr,
453 : index_exp, NULL_TREE, NULL_TREE,
454 : &overload, complain);
455 703 : else if ((*index_exp_list)->is_empty ())
456 141 : expr = build_op_subscript (loc, array_expr, index_exp_list, &overload,
457 : complain);
458 : else
459 : {
460 562 : expr = build_op_subscript (loc, array_expr, index_exp_list,
461 : &overload, complain & tf_decltype);
462 562 : if (expr == error_mark_node
463 : /* Don't do the backward compatibility fallback in a SFINAE
464 : context. */
465 17 : && (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 3241638 : tree p1, p2, i1, i2;
503 3241638 : 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 3241638 : if (TREE_CODE (type) == ARRAY_TYPE || VECTOR_TYPE_P (type))
510 : p1 = array_expr;
511 : else
512 2102411 : p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
513 :
514 3241638 : if (index_exp == NULL_TREE)
515 : {
516 60 : if (!(complain & tf_error))
517 : /* Don't do the backward compatibility fallback in a SFINAE
518 : context. */
519 12 : 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 3241625 : if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
554 : p2 = index_exp;
555 : else
556 3241589 : p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
557 :
558 3241625 : i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
559 : false);
560 3241625 : i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
561 : false);
562 :
563 3241625 : if ((p1 && i2) && (i1 && p2))
564 0 : error ("ambiguous conversion for array subscript");
565 :
566 3241625 : if (p1 && i2)
567 : array_expr = p1, index_exp = i2;
568 82 : else if (i1 && p2)
569 : swapped = true, array_expr = p2, index_exp = i1;
570 : else
571 : {
572 31 : if (complain & tf_error)
573 25 : error_at (loc, "invalid types %<%T[%T]%> for array subscript",
574 25 : type, TREE_TYPE (index_exp));
575 31 : return error_mark_node;
576 : }
577 :
578 3241594 : if (array_expr == error_mark_node || index_exp == error_mark_node)
579 0 : error ("ambiguous conversion for array subscript");
580 :
581 3241594 : if (TYPE_PTR_P (TREE_TYPE (array_expr)))
582 2102357 : array_expr = mark_rvalue_use (array_expr);
583 : else
584 1139237 : array_expr = mark_lvalue_use_nonread (array_expr);
585 3241594 : index_exp = mark_rvalue_use (index_exp);
586 3241594 : if (swapped
587 51 : && flag_strong_eval_order == 2
588 3241638 : && (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 3241576 : expr = build_array_ref (input_location, array_expr, index_exp);
592 : }
593 3460014 : if (processing_template_decl && expr != error_mark_node)
594 : {
595 1785619 : if (overload != NULL_TREE)
596 : {
597 179954 : if (orig_index_exp == NULL_TREE)
598 : {
599 29 : expr = build_min_non_dep_op_overload (expr, overload,
600 : orig_array_expr,
601 : orig_index_exp_list);
602 29 : release_tree_vector (orig_index_exp_list);
603 29 : return expr;
604 : }
605 179925 : return build_min_non_dep_op_overload (ARRAY_REF, expr, overload,
606 : orig_array_expr,
607 179925 : orig_index_exp);
608 : }
609 :
610 1605665 : 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 1605665 : return build_min_non_dep (ARRAY_REF, expr, orig_array_expr,
619 1605665 : 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 4831 : grok_omp_array_section (location_t loc, tree array_expr, tree index,
629 : tree length)
630 : {
631 4831 : tree orig_array_expr = array_expr;
632 4831 : tree orig_index = index;
633 4831 : tree orig_length = length;
634 :
635 4831 : if (error_operand_p (array_expr)
636 4822 : || error_operand_p (index)
637 9653 : || error_operand_p (length))
638 9 : return error_mark_node;
639 :
640 4822 : if (processing_template_decl
641 4822 : && (type_dependent_expression_p (array_expr)
642 757 : || type_dependent_expression_p (index)
643 741 : || type_dependent_expression_p (length)))
644 933 : return build_min_nt_loc (loc, OMP_ARRAY_SECTION, array_expr, index, length);
645 :
646 3889 : index = fold_non_dependent_expr (index);
647 3889 : 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 3889 : tree expr = build_omp_array_section (loc, array_expr, index, length);
654 :
655 3889 : 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 580140 : delete_sanity (location_t loc, tree exp, tree size, bool doing_vec,
670 : int use_global_delete, tsubst_flags_t complain)
671 : {
672 580140 : tree t, type;
673 :
674 580140 : if (exp == error_mark_node)
675 : return exp;
676 :
677 580023 : if (processing_template_decl)
678 : {
679 449761 : t = build_min (DELETE_EXPR, void_type_node, exp, size);
680 449761 : DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
681 449761 : DELETE_EXPR_USE_VEC (t) = doing_vec;
682 449761 : TREE_SIDE_EFFECTS (t) = 1;
683 449761 : SET_EXPR_LOCATION (t, loc);
684 449761 : return t;
685 : }
686 :
687 130262 : 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 130262 : if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE
691 130262 : && (complain & tf_warning))
692 21 : warning_at (exp_loc, 0, "deleting array %q#E", exp);
693 :
694 130262 : t = build_expr_type_conversion (WANT_POINTER, exp, true);
695 :
696 130262 : 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 130241 : 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 130241 : 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 130235 : 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 130235 : if (integer_zerop (t))
730 3 : return build1_loc (loc, NOP_EXPR, void_type_node, t);
731 :
732 130232 : if (doing_vec)
733 21637 : return build_vec_delete (loc, t, /*maxindex=*/NULL_TREE,
734 : sfk_deleting_destructor,
735 21637 : use_global_delete, complain);
736 : else
737 108595 : return build_delete (loc, type, t, sfk_deleting_destructor,
738 : LOOKUP_NORMAL, use_global_delete,
739 108595 : 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 23090237 : check_member_template (tree tmpl)
747 : {
748 23090237 : tree decl;
749 :
750 23090237 : gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
751 23090237 : decl = DECL_TEMPLATE_RESULT (tmpl);
752 :
753 23090237 : if (TREE_CODE (decl) == FUNCTION_DECL
754 2432820 : || DECL_ALIAS_TEMPLATE_P (tmpl)
755 24241585 : || (TREE_CODE (decl) == TYPE_DECL
756 802005 : && 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 23225599 : gcc_assert (!current_function_decl || LAMBDA_FUNCTION_P (decl));
761 : /* The parser rejects any use of virtual in a function template. */
762 22740894 : 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 22740894 : DECL_IGNORED_P (tmpl) = 1;
768 : }
769 349343 : else if (variable_template_p (tmpl))
770 : /* OK */;
771 : else
772 0 : error ("template declaration of %q#D", decl);
773 23090237 : }
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 9544806 : check_classfn (tree ctype, tree function, tree template_parms)
988 : {
989 9544806 : if (DECL_USE_TEMPLATE (function)
990 1219250 : && !(TREE_CODE (function) == TEMPLATE_DECL
991 1037 : && DECL_TEMPLATE_SPECIALIZATION (function))
992 10763019 : && 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 9146643 : if (TREE_CODE (function) == TEMPLATE_DECL)
1008 : {
1009 1055 : if (template_parms
1010 2092 : && !comp_template_parms (template_parms,
1011 1037 : 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 1055 : template_parms = DECL_TEMPLATE_PARMS (function);
1018 : }
1019 :
1020 : /* OK, is this a definition of a member template? */
1021 9146643 : bool is_template = (template_parms != NULL_TREE);
1022 :
1023 : /* [temp.mem]
1024 :
1025 : A destructor shall not be a member template. */
1026 18293286 : 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 9146637 : tree pushed_scope = push_scope (ctype);
1036 9146637 : tree matched = NULL_TREE;
1037 9146637 : tree fns = get_class_binding (ctype, DECL_NAME (function));
1038 9146637 : bool saw_template = false;
1039 :
1040 36782397 : for (ovl_iterator iter (fns); !matched && iter; ++iter)
1041 : {
1042 16392066 : tree fndecl = *iter;
1043 :
1044 16392066 : if (TREE_CODE (fndecl) == TEMPLATE_DECL)
1045 4074873 : saw_template = true;
1046 :
1047 : /* A member template definition only matches a member template
1048 : declaration. */
1049 16392066 : if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
1050 1770312 : continue;
1051 :
1052 14621754 : if (!DECL_DECLARES_FUNCTION_P (fndecl))
1053 303741 : continue;
1054 :
1055 14318013 : tree p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
1056 14318013 : 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 14318013 : if (DECL_STATIC_FUNCTION_P (fndecl)
1066 14318013 : && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
1067 178632 : p1 = TREE_CHAIN (p1);
1068 :
1069 : /* ref-qualifier or absence of same must match. */
1070 28636026 : if (type_memfn_rqual (TREE_TYPE (function))
1071 14318013 : != type_memfn_rqual (TREE_TYPE (fndecl)))
1072 86 : continue;
1073 :
1074 : // Include constraints in the match.
1075 14317927 : tree c1 = get_constraints (function);
1076 14317927 : 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 14317927 : if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
1082 : TREE_TYPE (TREE_TYPE (fndecl)))
1083 13557345 : && compparms (p1, p2)
1084 9146565 : && !disjoint_version_decls (function, fndecl)
1085 9146565 : && (!is_template
1086 2240032 : || comp_template_parms (template_parms,
1087 2240032 : DECL_TEMPLATE_PARMS (fndecl)))
1088 9146559 : && equivalent_constraints (c1, c2)
1089 9146508 : && (DECL_TEMPLATE_SPECIALIZATION (function)
1090 9146508 : == DECL_TEMPLATE_SPECIALIZATION (fndecl))
1091 23464435 : && (!DECL_TEMPLATE_SPECIALIZATION (function)
1092 799268 : || (DECL_TI_TEMPLATE (function) == DECL_TI_TEMPLATE (fndecl))))
1093 : matched = fndecl;
1094 : }
1095 :
1096 114 : if (!matched && !is_template && saw_template
1097 9146652 : && !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 9146637 : 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 9146637 : if (pushed_scope)
1140 8785838 : 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 50946719 : note_vague_linkage_fn (tree decl)
1151 : {
1152 50946719 : if (processing_template_decl)
1153 : return;
1154 :
1155 50946710 : DECL_DEFER_OUTPUT (decl) = 1;
1156 50946710 : vec_safe_push (deferred_fns, decl);
1157 : }
1158 :
1159 : /* As above, but for variables. */
1160 :
1161 : void
1162 13177804 : note_vague_linkage_variable (tree decl)
1163 : {
1164 13177804 : vec_safe_push (pending_statics, decl);
1165 13177804 : }
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 17348465 : finish_static_data_member_decl (tree decl,
1172 : tree init, bool init_const_expr_p,
1173 : tree asmspec_tree,
1174 : int flags)
1175 : {
1176 17348465 : 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 17348462 : 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 17348462 : if (! processing_template_decl)
1188 14357223 : vec_safe_push (pending_statics, decl);
1189 :
1190 17348462 : if (LOCAL_CLASS_P (current_class_type)
1191 : /* We already complained about the template definition. */
1192 17348462 : && !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 35098202 : for (tree t = current_class_type; TYPE_P (t);
1198 17722393 : t = CP_TYPE_CONTEXT (t))
1199 35444858 : 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 17348462 : 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 5768276 : DECL_IN_AGGR_P (decl) = 1;
1215 :
1216 17348462 : if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
1217 17348462 : && TYPE_DOMAIN (TREE_TYPE (decl)) == NULL_TREE)
1218 110742 : SET_VAR_HAD_UNKNOWN_BOUND (decl);
1219 :
1220 17348462 : 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 12742969 : tree type = TREE_TYPE (decl) = complete_type (TREE_TYPE (decl));
1226 12742969 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
1227 : }
1228 :
1229 17348462 : cp_finish_decl (decl, init, init_const_expr_p, asmspec_tree, flags);
1230 17348462 : 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 73950032 : 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 73950032 : tree value;
1245 73950032 : const char *asmspec = 0;
1246 73950032 : int flags;
1247 :
1248 73950032 : if (init
1249 13384782 : && TREE_CODE (init) == TREE_LIST
1250 0 : && TREE_VALUE (init) == error_mark_node
1251 73950032 : && TREE_CHAIN (init) == NULL_TREE)
1252 : init = NULL_TREE;
1253 :
1254 73950032 : int initialized;
1255 73950032 : if (init == ridpointers[(int)RID_DELETE]
1256 73950032 : || (init
1257 9652933 : && TREE_CODE (init) == STRING_CST
1258 373 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
1259 : initialized = SD_DELETED;
1260 70217810 : else if (init == ridpointers[(int)RID_DEFAULT])
1261 : initialized = SD_DEFAULTED;
1262 63248455 : else if (init)
1263 : initialized = SD_INITIALIZED;
1264 : else
1265 60565250 : initialized = SD_UNINITIALIZED;
1266 :
1267 73950032 : value = grokdeclarator (declarator, declspecs, FIELD, initialized, &attrlist);
1268 73950026 : if (! value || value == error_mark_node)
1269 : /* friend or constructor went bad. */
1270 340 : return error_mark_node;
1271 73949686 : if (TREE_TYPE (value) == error_mark_node)
1272 : return value;
1273 :
1274 73949527 : 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 73949527 : if (value == void_type_node)
1284 : return value;
1285 :
1286 73949527 : if (DECL_NAME (value)
1287 73949527 : && 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 73949524 : if (TREE_CODE (value) == TYPE_DECL)
1296 : {
1297 26032151 : DECL_NONLOCAL (value) = 1;
1298 26032151 : DECL_CONTEXT (value) = current_class_type;
1299 :
1300 26032151 : if (attrlist)
1301 : {
1302 23355 : 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 23355 : if (TYPE_DECL_FOR_LINKAGE_PURPOSES_P (value))
1307 12 : attrflags = ATTR_FLAG_TYPE_IN_PLACE;
1308 :
1309 23355 : cplus_decl_attributes (&value, attrlist, attrflags);
1310 : }
1311 :
1312 26032151 : if (decl_spec_seq_has_spec_p (declspecs, ds_typedef)
1313 26032151 : && TREE_TYPE (value) != error_mark_node
1314 52064302 : && TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (value))) != value)
1315 26031514 : 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 26032151 : if (processing_template_decl)
1321 21499090 : value = push_template_decl (value);
1322 :
1323 26032151 : record_locally_defined_typedef (value);
1324 26032151 : return value;
1325 : }
1326 :
1327 47917373 : int friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
1328 :
1329 47917373 : 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 47917373 : if (asmspec_tree && asmspec_tree != error_mark_node)
1336 194 : asmspec = TREE_STRING_POINTER (asmspec_tree);
1337 :
1338 47917373 : if (init)
1339 : {
1340 13384719 : if (TREE_CODE (value) == FUNCTION_DECL)
1341 : {
1342 11077909 : if (init == ridpointers[(int)RID_DELETE]
1343 11077909 : || (TREE_CODE (init) == STRING_CST
1344 373 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
1345 : {
1346 3732216 : DECL_DELETED_FN (value) = 1;
1347 3732216 : DECL_DECLARED_INLINE_P (value) = 1;
1348 3732216 : if (TREE_CODE (init) == STRING_CST)
1349 373 : DECL_INITIAL (value) = init;
1350 : }
1351 7345693 : else if (init == ridpointers[(int)RID_DEFAULT])
1352 : {
1353 6969352 : if (defaultable_fn_check (value))
1354 : {
1355 6969267 : DECL_DEFAULTED_FN (value) = 1;
1356 6969267 : DECL_INITIALIZED_IN_CLASS_P (value) = 1;
1357 6969267 : 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 6969267 : DECL_INITIAL (value) = NULL_TREE;
1361 : }
1362 : }
1363 376341 : else if (TREE_CODE (init) == DEFERRED_PARSE)
1364 0 : error ("invalid initializer for member function %qD", value);
1365 376341 : else if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
1366 : {
1367 376332 : if (integer_zerop (init))
1368 376293 : 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 2306810 : 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 47917373 : if ((TREE_CODE (value) == FUNCTION_DECL
1396 20518049 : || TREE_CODE (value) == TEMPLATE_DECL)
1397 47917430 : && DECL_CONTEXT (value) != current_class_type)
1398 : {
1399 2096663 : if (attrlist)
1400 0 : cplus_decl_attributes (&value, attrlist, 0);
1401 2096663 : return value;
1402 : }
1403 :
1404 : /* Need to set this before push_template_decl. */
1405 45820710 : if (VAR_P (value))
1406 709299 : DECL_CONTEXT (value) = current_class_type;
1407 :
1408 45820710 : if (processing_template_decl && VAR_OR_FUNCTION_DECL_P (value))
1409 : {
1410 15968574 : value = push_template_decl (value);
1411 15968574 : if (error_operand_p (value))
1412 7 : return error_mark_node;
1413 : }
1414 :
1415 45820703 : if (attrlist)
1416 901185 : cplus_decl_attributes (&value, attrlist, 0);
1417 :
1418 45820703 : if (init && DIRECT_LIST_INIT_P (init))
1419 : flags = LOOKUP_NORMAL;
1420 : else
1421 : flags = LOOKUP_IMPLICIT;
1422 :
1423 45820703 : switch (TREE_CODE (value))
1424 : {
1425 709295 : case VAR_DECL:
1426 709295 : finish_static_data_member_decl (value, init, init_const_expr_p,
1427 : asmspec_tree, flags);
1428 709295 : return value;
1429 :
1430 19808693 : case FIELD_DECL:
1431 19808693 : if (asmspec)
1432 6 : error ("%<asm%> specifiers are not permitted on non-static data members");
1433 19808693 : if (DECL_INITIAL (value) == error_mark_node)
1434 0 : init = error_mark_node;
1435 19808693 : cp_finish_decl (value, init, /*init_const_expr_p=*/false,
1436 : NULL_TREE, flags);
1437 19808693 : DECL_IN_AGGR_P (value) = 1;
1438 19808693 : return value;
1439 :
1440 25302715 : case FUNCTION_DECL:
1441 25302715 : if (asmspec)
1442 92 : set_user_assembler_name (value, asmspec);
1443 :
1444 25302715 : 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 25302715 : if (DECL_UNIQUE_FRIEND_P (value))
1451 0 : return void_type_node;
1452 :
1453 25302715 : DECL_IN_AGGR_P (value) = 1;
1454 25302715 : 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 12742976 : start_initialized_static_member (const cp_declarator *declarator,
1468 : cp_decl_specifier_seq *declspecs,
1469 : tree attrlist)
1470 : {
1471 12742976 : tree value = grokdeclarator (declarator, declspecs, FIELD, SD_INITIALIZED,
1472 12742976 : &attrlist);
1473 12742976 : if (!value || error_operand_p (value))
1474 3 : return error_mark_node;
1475 12742973 : 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 12742973 : 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 12742973 : 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 12742970 : gcc_checking_assert (VAR_P (value));
1503 :
1504 12742970 : DECL_CONTEXT (value) = current_class_type;
1505 12742970 : DECL_INITIALIZED_IN_CLASS_P (value) = true;
1506 :
1507 12742970 : if (processing_template_decl)
1508 : {
1509 2828932 : value = push_template_decl (value);
1510 2828932 : if (error_operand_p (value))
1511 0 : return error_mark_node;
1512 : }
1513 :
1514 12742970 : if (attrlist)
1515 139332 : cplus_decl_attributes (&value, attrlist, 0);
1516 :
1517 : /* When defining a template we need to register the TEMPLATE_DECL. */
1518 12742970 : tree maybe_template = value;
1519 12742970 : if (template_parm_scope_p ())
1520 : {
1521 393311 : if (!DECL_TEMPLATE_SPECIALIZATION (value))
1522 349234 : maybe_template = DECL_TI_TEMPLATE (value);
1523 : else
1524 : maybe_template = NULL_TREE;
1525 : }
1526 12698893 : if (maybe_template)
1527 12698893 : finish_member_declaration (maybe_template);
1528 :
1529 12742970 : 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 36131653 : is_static_data_member_initialized_in_class (tree decl)
1537 : {
1538 36131653 : if (!decl || decl == error_mark_node)
1539 : return false;
1540 :
1541 36130510 : tree inner = STRIP_TEMPLATE (decl);
1542 21764354 : return (inner
1543 36130510 : && VAR_P (inner)
1544 13254979 : && DECL_CLASS_SCOPE_P (inner)
1545 35013300 : && DECL_INITIALIZED_IN_CLASS_P (inner));
1546 : }
1547 :
1548 : /* Finish a declaration prepared with start_initialized_static_member. */
1549 :
1550 : void
1551 12742973 : finish_initialized_static_member (tree decl, tree init, tree asmspec)
1552 : {
1553 12742973 : if (decl == error_mark_node)
1554 : return;
1555 12742967 : gcc_checking_assert (is_static_data_member_initialized_in_class (decl));
1556 :
1557 12742967 : int flags;
1558 12742967 : if (init && DIRECT_LIST_INIT_P (init))
1559 : flags = LOOKUP_NORMAL;
1560 : else
1561 : flags = LOOKUP_IMPLICIT;
1562 12742967 : 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 614799 : grokbitfield (const cp_declarator *declarator,
1572 : cp_decl_specifier_seq *declspecs, tree width, tree init,
1573 : tree attrlist)
1574 : {
1575 614799 : tree value = grokdeclarator (declarator, declspecs, BITFIELD,
1576 614799 : init != NULL_TREE, &attrlist);
1577 :
1578 614799 : if (value == error_mark_node)
1579 : return NULL_TREE; /* friends went bad. */
1580 :
1581 614793 : tree type = TREE_TYPE (value);
1582 614793 : if (type == error_mark_node)
1583 : return value;
1584 :
1585 : /* Pass friendly classes back. */
1586 614746 : if (VOID_TYPE_P (value))
1587 0 : return void_type_node;
1588 :
1589 614746 : if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type)
1590 614746 : && (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 614713 : 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 614707 : 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 614704 : 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 614695 : 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 614695 : 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 : /* [class.bit]/2 "An unnamed bit-field shall not be declared with
1638 : a cv-qualified type." */
1639 614689 : if (!DECL_NAME (value) && TYPE_QUALS (type) != TYPE_UNQUALIFIED)
1640 18 : pedwarn (DECL_SOURCE_LOCATION (value), 0,
1641 : "unnamed bit-field cannot be cv-qualified");
1642 :
1643 614689 : int flags = LOOKUP_IMPLICIT;
1644 614689 : if (init && DIRECT_LIST_INIT_P (init))
1645 : flags = LOOKUP_NORMAL;
1646 614689 : cp_finish_decl (value, init, false, NULL_TREE, flags);
1647 :
1648 614689 : if (width != error_mark_node)
1649 : {
1650 : /* The width must be an integer type. */
1651 614672 : if (!type_dependent_expression_p (width)
1652 614672 : && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (width)))
1653 21 : error ("width of bit-field %qD has non-integral type %qT", value,
1654 21 : TREE_TYPE (width));
1655 614651 : else if (!check_for_bare_parameter_packs (width))
1656 : {
1657 : /* Temporarily stash the width in DECL_BIT_FIELD_REPRESENTATIVE.
1658 : check_bitfield_decl picks it from there later and sets DECL_SIZE
1659 : accordingly. */
1660 614645 : DECL_BIT_FIELD_REPRESENTATIVE (value) = width;
1661 614645 : SET_DECL_C_BIT_FIELD (value);
1662 : }
1663 : }
1664 :
1665 614689 : DECL_IN_AGGR_P (value) = 1;
1666 :
1667 614689 : if (attrlist)
1668 1212 : cplus_decl_attributes (&value, attrlist, /*flags=*/0);
1669 :
1670 614689 : return value;
1671 : }
1672 :
1673 :
1674 : /* Returns true iff ATTR is an attribute which needs to be applied at
1675 : instantiation time rather than template definition time. */
1676 :
1677 : static bool
1678 17593164 : is_late_template_attribute (tree attr, tree decl)
1679 : {
1680 17593164 : tree name = get_attribute_name (attr);
1681 17593164 : tree args = TREE_VALUE (attr);
1682 17593164 : const struct attribute_spec *spec
1683 17593164 : = lookup_attribute_spec (TREE_PURPOSE (attr));
1684 17593164 : tree arg;
1685 :
1686 : /* Handle all annotations as late, so that they aren't incorrectly
1687 : reordered if some have dependent expressions and others don't. */
1688 17593164 : if (annotation_p (attr))
1689 : return true;
1690 :
1691 17593084 : if (!spec)
1692 : /* Unknown attribute. */
1693 : return false;
1694 :
1695 : /* Attribute weak handling wants to write out assembly right away. */
1696 17593050 : if (is_attribute_p ("weak", name))
1697 : return true;
1698 :
1699 : /* Attributes used and unused or std attribute maybe_unused are applied
1700 : directly to typedefs for the benefit of
1701 : maybe_warn_unused_local_typedefs. */
1702 17593047 : if (TREE_CODE (decl) == TYPE_DECL
1703 17593047 : && (is_attribute_p ("unused", name)
1704 19724 : || is_attribute_p ("used", name)
1705 19718 : || (is_attribute_p ("maybe_unused", name)
1706 10 : && get_attribute_namespace (attr) == NULL_TREE)))
1707 244 : return false;
1708 :
1709 : /* Attribute tls_model wants to modify the symtab. */
1710 17592803 : if (is_attribute_p ("tls_model", name))
1711 : return true;
1712 :
1713 : /* #pragma omp declare simd attribute needs to be always deferred. */
1714 17592800 : if (flag_openmp
1715 17592800 : && is_attribute_p ("omp declare simd", name))
1716 : return true;
1717 :
1718 17591908 : if (args == error_mark_node)
1719 : return false;
1720 :
1721 : /* An attribute pack is clearly dependent. */
1722 17591908 : if (args && PACK_EXPANSION_P (args))
1723 : return true;
1724 :
1725 : /* If any of the arguments are dependent expressions, we can't evaluate
1726 : the attribute until instantiation time. */
1727 18532343 : for (arg = args; arg; arg = TREE_CHAIN (arg))
1728 : {
1729 1074422 : tree t = TREE_VALUE (arg);
1730 :
1731 : /* If the first attribute argument is an identifier, only consider
1732 : second and following arguments. Attributes like mode, format,
1733 : cleanup and several target specific attributes aren't late
1734 : just because they have an IDENTIFIER_NODE as first argument. */
1735 1112540 : if (arg == args
1736 1033342 : && get_attribute_namespace (attr) == gnu_identifier
1737 871225 : && attribute_takes_identifier_p (name)
1738 1074422 : && identifier_p (t))
1739 38118 : continue;
1740 :
1741 1036304 : if (value_dependent_expression_p (t))
1742 : return true;
1743 : }
1744 :
1745 17457921 : if (TREE_CODE (decl) == TYPE_DECL
1746 17440849 : || TYPE_P (decl)
1747 16987231 : || spec->type_required)
1748 : {
1749 881567 : tree type = TYPE_P (decl) ? decl : TREE_TYPE (decl);
1750 :
1751 427949 : if (!type)
1752 : return true;
1753 :
1754 : /* Some attributes specifically apply to templates. */
1755 881564 : if (is_attribute_p ("abi_tag", name)
1756 881540 : || is_attribute_p ("deprecated", name)
1757 498996 : || is_attribute_p ("unavailable", name)
1758 498990 : || is_attribute_p ("visibility", name)
1759 1380542 : || is_attribute_p ("no_specializations", name))
1760 : return false;
1761 : /* Defer most attributes on dependent types. This is not
1762 : necessary in all cases, but is the better default. */
1763 426336 : else if (dependent_type_p (type))
1764 : return true;
1765 : else
1766 : return false;
1767 : }
1768 : else
1769 : return false;
1770 : }
1771 :
1772 : /* ATTR_P is a list of attributes. Remove any attributes which need to be
1773 : applied at instantiation time and return them. If IS_DEPENDENT is true,
1774 : the declaration itself is dependent, so all attributes should be applied
1775 : at instantiation time. */
1776 :
1777 : tree
1778 244403838 : splice_template_attributes (tree *attr_p, tree decl)
1779 : {
1780 244403838 : tree *p = attr_p;
1781 244403838 : tree late_attrs = NULL_TREE;
1782 244403838 : tree *q = &late_attrs;
1783 :
1784 244403838 : if (!p || *p == error_mark_node)
1785 : return NULL_TREE;
1786 :
1787 261997002 : for (; *p; )
1788 : {
1789 17593164 : if (is_late_template_attribute (*p, decl))
1790 : {
1791 507877 : ATTR_IS_DEPENDENT (*p) = 1;
1792 507877 : *q = *p;
1793 507877 : *p = TREE_CHAIN (*p);
1794 507877 : q = &TREE_CHAIN (*q);
1795 507877 : *q = NULL_TREE;
1796 : }
1797 : else
1798 17085287 : p = &TREE_CHAIN (*p);
1799 : }
1800 :
1801 244403838 : return late_attrs;
1802 : }
1803 :
1804 : /* Attach any LATE_ATTRS to DECL_P, after the non-dependent attributes have
1805 : been applied by a previous call to decl_attributes. */
1806 :
1807 : static void
1808 505917 : save_template_attributes (tree late_attrs, tree *decl_p, int flags)
1809 : {
1810 505917 : tree *q;
1811 :
1812 505917 : if (!late_attrs)
1813 : return;
1814 :
1815 505917 : if (DECL_P (*decl_p))
1816 493322 : q = &DECL_ATTRIBUTES (*decl_p);
1817 : else
1818 12595 : q = &TYPE_ATTRIBUTES (*decl_p);
1819 :
1820 505917 : tree old_attrs = *q;
1821 :
1822 : /* Place the late attributes at the beginning of the attribute
1823 : list. */
1824 505917 : late_attrs = chainon (late_attrs, *q);
1825 505917 : if (*q != late_attrs
1826 505917 : && !DECL_P (*decl_p)
1827 12595 : && !(flags & ATTR_FLAG_TYPE_IN_PLACE))
1828 : {
1829 52 : if (!dependent_type_p (*decl_p))
1830 12 : *decl_p = cp_build_type_attribute_variant (*decl_p, late_attrs);
1831 : else
1832 : {
1833 40 : *decl_p = build_variant_type_copy (*decl_p);
1834 40 : TYPE_ATTRIBUTES (*decl_p) = late_attrs;
1835 : }
1836 : }
1837 : else
1838 505865 : *q = late_attrs;
1839 :
1840 505917 : if (!DECL_P (*decl_p) && *decl_p == TYPE_MAIN_VARIANT (*decl_p))
1841 : {
1842 : /* We've added new attributes directly to the main variant, so
1843 : now we need to update all of the other variants to include
1844 : these new attributes. */
1845 12555 : tree variant;
1846 12695 : for (variant = TYPE_NEXT_VARIANT (*decl_p); variant;
1847 140 : variant = TYPE_NEXT_VARIANT (variant))
1848 : {
1849 140 : gcc_assert (TYPE_ATTRIBUTES (variant) == old_attrs);
1850 140 : TYPE_ATTRIBUTES (variant) = TYPE_ATTRIBUTES (*decl_p);
1851 : }
1852 : }
1853 : }
1854 :
1855 : /* True if ATTRS contains any dependent attributes that affect type
1856 : identity. */
1857 :
1858 : bool
1859 1983063501 : any_dependent_type_attributes_p (tree attrs)
1860 : {
1861 2017024433 : for (tree a = attrs; a; a = TREE_CHAIN (a))
1862 33962164 : if (ATTR_IS_DEPENDENT (a))
1863 : {
1864 2031224 : const attribute_spec *as = lookup_attribute_spec (TREE_PURPOSE (a));
1865 2031224 : if (as && as->affects_type_identity)
1866 : return true;
1867 : }
1868 : return false;
1869 : }
1870 :
1871 : /* Return true iff ATTRS are acceptable attributes to be applied in-place
1872 : to a typedef which gives a previously unnamed class or enum a name for
1873 : linkage purposes. */
1874 :
1875 : bool
1876 403272 : attributes_naming_typedef_ok (tree attrs)
1877 : {
1878 415078 : for (; attrs; attrs = TREE_CHAIN (attrs))
1879 : {
1880 11809 : tree name = get_attribute_name (attrs);
1881 11809 : if (is_attribute_p ("vector_size", name))
1882 : return false;
1883 : }
1884 : return true;
1885 : }
1886 :
1887 : /* Like reconstruct_complex_type, but handle also template trees. */
1888 :
1889 : tree
1890 31526 : cp_reconstruct_complex_type (tree type, tree bottom)
1891 : {
1892 31526 : tree inner, outer;
1893 :
1894 31526 : if (TYPE_PTR_P (type))
1895 : {
1896 42 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1897 42 : outer = build_pointer_type_for_mode (inner, TYPE_MODE (type),
1898 42 : TYPE_REF_CAN_ALIAS_ALL (type));
1899 : }
1900 : else if (TYPE_REF_P (type))
1901 : {
1902 12 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1903 12 : outer = build_reference_type_for_mode (inner, TYPE_MODE (type),
1904 12 : TYPE_REF_CAN_ALIAS_ALL (type));
1905 : }
1906 : else if (TREE_CODE (type) == ARRAY_TYPE)
1907 : {
1908 30 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1909 30 : outer = build_cplus_array_type (inner, TYPE_DOMAIN (type));
1910 : /* Don't call cp_build_qualified_type on ARRAY_TYPEs, the
1911 : element type qualification will be handled by the recursive
1912 : cp_reconstruct_complex_type call and cp_build_qualified_type
1913 : for ARRAY_TYPEs changes the element type. */
1914 30 : return outer;
1915 : }
1916 : else if (TREE_CODE (type) == FUNCTION_TYPE)
1917 : {
1918 131 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1919 131 : outer = build_function_type (inner, TYPE_ARG_TYPES (type),
1920 131 : TYPE_NO_NAMED_ARGS_STDARG_P (type));
1921 131 : outer = apply_memfn_quals (outer, type_memfn_quals (type));
1922 : }
1923 : else if (TREE_CODE (type) == METHOD_TYPE)
1924 : {
1925 12 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1926 : /* The build_method_type_directly() routine prepends 'this' to argument list,
1927 : so we must compensate by getting rid of it. */
1928 12 : outer
1929 : = build_method_type_directly
1930 12 : (class_of_this_parm (type), inner,
1931 12 : TREE_CHAIN (TYPE_ARG_TYPES (type)));
1932 : }
1933 : else if (TREE_CODE (type) == OFFSET_TYPE)
1934 : {
1935 3 : inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1936 3 : outer = build_offset_type (TYPE_OFFSET_BASETYPE (type), inner);
1937 : }
1938 : else
1939 : return bottom;
1940 :
1941 200 : if (TYPE_ATTRIBUTES (type))
1942 0 : outer = cp_build_type_attribute_variant (outer, TYPE_ATTRIBUTES (type));
1943 200 : outer = cp_build_qualified_type (outer, cp_type_quals (type));
1944 200 : outer = cxx_copy_lang_qualifiers (outer, type);
1945 :
1946 200 : return outer;
1947 : }
1948 :
1949 : /* Replaces any constexpr expression that may be into the attributes
1950 : arguments with their reduced value. */
1951 :
1952 : void
1953 392100312 : cp_check_const_attributes (tree attributes)
1954 : {
1955 392100312 : if (attributes == error_mark_node)
1956 : return;
1957 :
1958 : tree attr;
1959 432487278 : for (attr = attributes; attr; attr = TREE_CHAIN (attr))
1960 : {
1961 : /* Annotation arguments are handled in handle_annotation_attribute. */
1962 40386966 : if (annotation_p (attr))
1963 758 : continue;
1964 :
1965 40386208 : tree arg;
1966 : /* As we implement alignas using gnu::aligned attribute and
1967 : alignas argument is a constant expression, force manifestly
1968 : constant evaluation of aligned attribute argument. */
1969 40386208 : bool manifestly_const_eval
1970 40386208 : = is_attribute_p ("aligned", get_attribute_name (attr));
1971 52550072 : for (arg = TREE_VALUE (attr); arg && TREE_CODE (arg) == TREE_LIST;
1972 12163864 : arg = TREE_CHAIN (arg))
1973 : {
1974 12163864 : tree expr = TREE_VALUE (arg);
1975 12163864 : if (EXPR_P (expr))
1976 8852 : TREE_VALUE (arg)
1977 4426 : = fold_non_dependent_expr (expr, tf_warning_or_error,
1978 : manifestly_const_eval);
1979 : }
1980 : }
1981 : }
1982 :
1983 : /* Copies hot or cold attributes to a function FN if present on the
1984 : encapsulating class, struct, or union TYPE. */
1985 :
1986 : void
1987 25259590 : maybe_propagate_warmth_attributes (tree fn, tree type)
1988 : {
1989 25259590 : if (fn == NULL_TREE || type == NULL_TREE
1990 25259590 : || !(TREE_CODE (type) == RECORD_TYPE
1991 : || TREE_CODE (type) == UNION_TYPE))
1992 : return;
1993 :
1994 25259590 : tree has_cold_attr = lookup_attribute ("cold", TYPE_ATTRIBUTES (type));
1995 25259590 : tree has_hot_attr = lookup_attribute ("hot", TYPE_ATTRIBUTES (type));
1996 :
1997 25259590 : if (has_cold_attr || has_hot_attr)
1998 : {
1999 : /* Transparently ignore the new warmth attribute if it
2000 : conflicts with a present function attribute. Otherwise
2001 : decl_attribute would still honour the present attribute,
2002 : but producing an undesired warning in the process. */
2003 :
2004 18 : if (has_cold_attr)
2005 : {
2006 9 : if (lookup_attribute ("hot", DECL_ATTRIBUTES (fn)) == NULL)
2007 : {
2008 9 : tree cold_cons
2009 9 : = tree_cons (get_identifier ("cold"), NULL, NULL);
2010 :
2011 9 : decl_attributes (&fn, cold_cons, 0);
2012 : }
2013 : }
2014 9 : else if (has_hot_attr)
2015 : {
2016 9 : if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn)) == NULL)
2017 : {
2018 9 : tree hot_cons
2019 9 : = tree_cons (get_identifier ("hot"), NULL, NULL);
2020 :
2021 9 : decl_attributes (&fn, hot_cons, 0);
2022 : }
2023 : }
2024 : }
2025 : }
2026 :
2027 : /* Return the last pushed declaration for the symbol DECL or NULL
2028 : when no such declaration exists. */
2029 :
2030 : static tree
2031 392032843 : find_last_decl (tree decl)
2032 : {
2033 392032843 : tree last_decl = NULL_TREE;
2034 :
2035 392032843 : if (tree name = DECL_P (decl) ? DECL_NAME (decl) : NULL_TREE)
2036 : {
2037 : /* Template specializations are matched elsewhere. */
2038 326677027 : if (DECL_LANG_SPECIFIC (decl)
2039 326677027 : && DECL_USE_TEMPLATE (decl))
2040 : return NULL_TREE;
2041 :
2042 : /* Look up the declaration in its scope. */
2043 321674780 : tree pushed_scope = NULL_TREE;
2044 321674780 : if (tree ctype = DECL_CONTEXT (decl))
2045 246921478 : pushed_scope = push_scope (ctype);
2046 :
2047 321674780 : last_decl = lookup_name (name);
2048 :
2049 321674780 : if (pushed_scope)
2050 139226508 : pop_scope (pushed_scope);
2051 :
2052 : /* The declaration may be a member conversion operator
2053 : or a bunch of overfloads (handle the latter below). */
2054 321674780 : if (last_decl && BASELINK_P (last_decl))
2055 183239 : last_decl = BASELINK_FUNCTIONS (last_decl);
2056 : }
2057 :
2058 65294642 : if (!last_decl)
2059 287296707 : return NULL_TREE;
2060 :
2061 99733889 : if (DECL_P (last_decl) || TREE_CODE (last_decl) == OVERLOAD)
2062 : {
2063 : /* A set of overloads of the same function. */
2064 568946188 : for (lkp_iterator iter (last_decl); iter; ++iter)
2065 : {
2066 479456933 : if (TREE_CODE (*iter) == OVERLOAD)
2067 0 : continue;
2068 :
2069 479456933 : tree d = *iter;
2070 :
2071 : /* We can't compare versions in the middle of processing the
2072 : attribute that has the version. */
2073 479456933 : if (TREE_CODE (d) == FUNCTION_DECL
2074 479456933 : && DECL_FUNCTION_VERSIONED (d))
2075 10225577 : return NULL_TREE;
2076 :
2077 479455796 : if (decls_match (decl, d, /*record_decls=*/false))
2078 : return d;
2079 : }
2080 89489255 : return NULL_TREE;
2081 : }
2082 :
2083 : return NULL_TREE;
2084 : }
2085 :
2086 : /* Like decl_attributes, but handle C++ complexity. */
2087 :
2088 : void
2089 392098329 : cplus_decl_attributes (tree *decl, tree attributes, int flags)
2090 : {
2091 392098329 : if (*decl == NULL_TREE || *decl == void_type_node
2092 392098329 : || *decl == error_mark_node || attributes == error_mark_node)
2093 : return;
2094 :
2095 : /* Add implicit "omp declare target" attribute if requested. */
2096 392098244 : if (vec_safe_length (scope_chain->omp_declare_target_attribute)
2097 10866 : && ((VAR_P (*decl)
2098 2156 : && (TREE_STATIC (*decl) || DECL_EXTERNAL (*decl)))
2099 3372 : || TREE_CODE (*decl) == FUNCTION_DECL))
2100 : {
2101 1693 : if (VAR_P (*decl)
2102 1693 : && DECL_CLASS_SCOPE_P (*decl))
2103 0 : error ("%q+D static data member inside of declare target directive",
2104 : *decl);
2105 : else
2106 : {
2107 1693 : if (VAR_P (*decl)
2108 1693 : && (processing_template_decl
2109 282 : || !omp_mappable_type (TREE_TYPE (*decl))))
2110 52 : attributes
2111 52 : = tree_cons (get_identifier ("omp declare target implicit"),
2112 : NULL_TREE, attributes);
2113 : else
2114 1641 : attributes = tree_cons (get_identifier ("omp declare target"),
2115 : NULL_TREE, attributes);
2116 1693 : if (TREE_CODE (*decl) == FUNCTION_DECL)
2117 : {
2118 1411 : cp_omp_declare_target_attr &last
2119 1411 : = scope_chain->omp_declare_target_attribute->last ();
2120 1411 : int device_type = MAX (last.device_type, 0);
2121 1411 : if ((device_type & OMP_CLAUSE_DEVICE_TYPE_HOST) != 0
2122 1411 : && !lookup_attribute ("omp declare target host",
2123 : attributes))
2124 6 : attributes
2125 6 : = tree_cons (get_identifier ("omp declare target host"),
2126 : NULL_TREE, attributes);
2127 1411 : if ((device_type & OMP_CLAUSE_DEVICE_TYPE_NOHOST) != 0
2128 1411 : && !lookup_attribute ("omp declare target nohost",
2129 : attributes))
2130 6 : attributes
2131 6 : = tree_cons (get_identifier ("omp declare target nohost"),
2132 : NULL_TREE, attributes);
2133 1411 : if (last.indirect
2134 1411 : && !lookup_attribute ("omp declare target indirect",
2135 : attributes))
2136 21 : attributes
2137 21 : = tree_cons (get_identifier ("omp declare target indirect"),
2138 : NULL_TREE, attributes);
2139 : }
2140 : }
2141 : }
2142 :
2143 392098244 : tree late_attrs = NULL_TREE;
2144 392098244 : if (processing_template_decl)
2145 : {
2146 244390426 : if (check_for_bare_parameter_packs (attributes))
2147 : return;
2148 244390417 : late_attrs = splice_template_attributes (&attributes, *decl);
2149 : }
2150 :
2151 392098235 : cp_check_const_attributes (attributes);
2152 :
2153 392098235 : if (flag_openmp || flag_openmp_simd)
2154 : {
2155 : bool diagnosed = false;
2156 1368656 : for (tree *pa = &attributes; *pa; )
2157 : {
2158 188061 : if (get_attribute_namespace (*pa) == omp_identifier)
2159 : {
2160 209 : tree name = get_attribute_name (*pa);
2161 209 : if (is_attribute_p ("directive", name)
2162 0 : || is_attribute_p ("sequence", name)
2163 209 : || is_attribute_p ("decl", name))
2164 : {
2165 209 : const char *p = NULL;
2166 209 : if (TREE_VALUE (*pa) == NULL_TREE)
2167 9 : p = IDENTIFIER_POINTER (name);
2168 409 : for (tree a = TREE_VALUE (*pa); a; a = TREE_CHAIN (a))
2169 : {
2170 200 : tree d = TREE_VALUE (a);
2171 200 : gcc_assert (TREE_CODE (d) == DEFERRED_PARSE);
2172 340 : if (TREE_PUBLIC (d)
2173 143 : && (VAR_P (*decl)
2174 10 : || TREE_CODE (*decl) == FUNCTION_DECL)
2175 343 : && cp_maybe_parse_omp_decl (*decl, d))
2176 140 : continue;
2177 60 : p = TREE_PUBLIC (d) ? "decl" : "directive";
2178 : }
2179 209 : if (p && !diagnosed)
2180 : {
2181 69 : error ("%<omp::%s%> not allowed to be specified in "
2182 : "this context", p);
2183 69 : diagnosed = true;
2184 : }
2185 209 : if (p)
2186 : {
2187 69 : *pa = TREE_CHAIN (*pa);
2188 69 : continue;
2189 : }
2190 : }
2191 : }
2192 187992 : pa = &TREE_CHAIN (*pa);
2193 : }
2194 : }
2195 :
2196 392098235 : if (TREE_CODE (*decl) == TEMPLATE_DECL)
2197 1037 : decl = &DECL_TEMPLATE_RESULT (*decl);
2198 :
2199 392098235 : if (TREE_TYPE (*decl) && TYPE_PTRMEMFUNC_P (TREE_TYPE (*decl)))
2200 : {
2201 65392 : attributes
2202 65392 : = decl_attributes (decl, attributes, flags | ATTR_FLAG_FUNCTION_NEXT);
2203 65392 : decl_attributes (&TYPE_PTRMEMFUNC_FN_TYPE_RAW (TREE_TYPE (*decl)),
2204 : attributes, flags);
2205 : }
2206 : else
2207 : {
2208 392032843 : tree last_decl = find_last_decl (*decl);
2209 392032843 : decl_attributes (decl, attributes, flags, last_decl);
2210 : }
2211 :
2212 392098235 : if (late_attrs)
2213 505917 : save_template_attributes (late_attrs, decl, flags);
2214 :
2215 : /* Propagate deprecation out to the template. */
2216 392098235 : if (TREE_DEPRECATED (*decl))
2217 1704685 : if (tree ti = get_template_info (*decl))
2218 : {
2219 491938 : tree tmpl = TI_TEMPLATE (ti);
2220 491938 : tree pattern = (TYPE_P (*decl) ? TREE_TYPE (tmpl)
2221 491938 : : DECL_TEMPLATE_RESULT (tmpl));
2222 491938 : if (*decl == pattern)
2223 448657 : TREE_DEPRECATED (tmpl) = true;
2224 : }
2225 :
2226 : /* Likewise, propagate unavailability out to the template. */
2227 392098235 : if (TREE_UNAVAILABLE (*decl))
2228 252 : if (tree ti = get_template_info (*decl))
2229 : {
2230 9 : tree tmpl = TI_TEMPLATE (ti);
2231 9 : tree pattern = (TYPE_P (*decl) ? TREE_TYPE (tmpl)
2232 9 : : DECL_TEMPLATE_RESULT (tmpl));
2233 9 : if (*decl == pattern)
2234 9 : TREE_UNAVAILABLE (tmpl) = true;
2235 : }
2236 :
2237 392098235 : if (VAR_P (*decl) && CP_DECL_THREAD_LOCAL_P (*decl))
2238 : {
2239 : // tls_model attribute can set a stronger TLS access model.
2240 20069 : tls_model model = DECL_TLS_MODEL (*decl);
2241 : // Don't upgrade TLS model if TLS model isn't set yet.
2242 20069 : if (model != TLS_MODEL_NONE)
2243 : {
2244 19944 : tls_model default_model = decl_default_tls_model (*decl);
2245 19944 : if (default_model > model)
2246 19722 : set_decl_tls_model (*decl, default_model);
2247 : }
2248 : }
2249 :
2250 : /* For target_version semantics, mark any annotated function as versioned
2251 : so that it gets mangled even when on its own in a TU. */
2252 : if (!TARGET_HAS_FMV_TARGET_ATTRIBUTE
2253 : && TREE_CODE (*decl) == FUNCTION_DECL
2254 : && get_target_version (*decl).is_valid ())
2255 : maybe_mark_function_versioned (*decl);
2256 : }
2257 :
2258 : /* Walks through the namespace- or function-scope anonymous union
2259 : OBJECT, with the indicated TYPE, building appropriate VAR_DECLs.
2260 : Returns one of the fields for use in the mangled name. */
2261 :
2262 : static tree
2263 451 : build_anon_union_vars (tree type, tree object)
2264 : {
2265 451 : tree main_decl = NULL_TREE;
2266 451 : tree field;
2267 :
2268 : /* Rather than write the code to handle the non-union case,
2269 : just give an error. */
2270 451 : if (TREE_CODE (type) != UNION_TYPE)
2271 : {
2272 6 : error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
2273 : "anonymous struct not inside named type");
2274 6 : return error_mark_node;
2275 : }
2276 :
2277 445 : for (field = TYPE_FIELDS (type);
2278 1551 : field != NULL_TREE;
2279 1106 : field = DECL_CHAIN (field))
2280 : {
2281 1106 : tree decl;
2282 1106 : tree ref;
2283 :
2284 1106 : if (DECL_ARTIFICIAL (field))
2285 546 : continue;
2286 560 : if (TREE_CODE (field) != FIELD_DECL)
2287 : {
2288 0 : permerror (DECL_SOURCE_LOCATION (field),
2289 : "%q#D invalid; an anonymous union can only "
2290 : "have non-static data members", field);
2291 0 : continue;
2292 : }
2293 :
2294 560 : if (TREE_PRIVATE (field))
2295 6 : permerror (DECL_SOURCE_LOCATION (field),
2296 : "private member %q#D in anonymous union", field);
2297 554 : else if (TREE_PROTECTED (field))
2298 0 : permerror (DECL_SOURCE_LOCATION (field),
2299 : "protected member %q#D in anonymous union", field);
2300 :
2301 560 : if (processing_template_decl)
2302 66 : ref = build_min_nt_loc (UNKNOWN_LOCATION, COMPONENT_REF, object,
2303 : field, NULL_TREE);
2304 : else
2305 494 : ref = build_class_member_access_expr (object, field, NULL_TREE,
2306 : false, tf_warning_or_error);
2307 :
2308 560 : if (DECL_NAME (field))
2309 : {
2310 519 : tree base;
2311 :
2312 519 : decl = build_decl (input_location,
2313 519 : VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
2314 519 : DECL_ANON_UNION_VAR_P (decl) = 1;
2315 519 : DECL_ARTIFICIAL (decl) = 1;
2316 :
2317 519 : base = get_base_address (object);
2318 519 : TREE_PUBLIC (decl) = TREE_PUBLIC (base);
2319 519 : TREE_STATIC (decl) = TREE_STATIC (base);
2320 519 : DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
2321 :
2322 519 : SET_DECL_VALUE_EXPR (decl, ref);
2323 519 : DECL_HAS_VALUE_EXPR_P (decl) = 1;
2324 :
2325 519 : decl = pushdecl (decl);
2326 : }
2327 41 : else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
2328 41 : decl = build_anon_union_vars (TREE_TYPE (field), ref);
2329 : else
2330 : decl = 0;
2331 :
2332 560 : if (main_decl == NULL_TREE)
2333 1106 : main_decl = decl;
2334 : }
2335 :
2336 : return main_decl;
2337 : }
2338 :
2339 : /* Finish off the processing of a UNION_TYPE structure. If the union is an
2340 : anonymous union, then all members must be laid out together. PUBLIC_P
2341 : is nonzero if this union is not declared static. */
2342 :
2343 : void
2344 419 : finish_anon_union (tree anon_union_decl)
2345 : {
2346 419 : tree type;
2347 419 : tree main_decl;
2348 419 : bool public_p;
2349 :
2350 419 : if (anon_union_decl == error_mark_node)
2351 : return;
2352 :
2353 410 : type = TREE_TYPE (anon_union_decl);
2354 410 : public_p = TREE_PUBLIC (anon_union_decl);
2355 :
2356 : /* The VAR_DECL's context is the same as the TYPE's context. */
2357 410 : DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
2358 :
2359 410 : if (TYPE_FIELDS (type) == NULL_TREE)
2360 : return;
2361 :
2362 410 : if (public_p)
2363 : {
2364 0 : error ("namespace-scope anonymous aggregates must be static");
2365 0 : return;
2366 : }
2367 :
2368 410 : main_decl = build_anon_union_vars (type, anon_union_decl);
2369 410 : if (main_decl == error_mark_node)
2370 : return;
2371 386 : if (main_decl == NULL_TREE)
2372 : {
2373 12 : pedwarn (input_location, 0, "anonymous union with no members");
2374 12 : return;
2375 : }
2376 :
2377 374 : if (!processing_template_decl)
2378 : {
2379 : /* Use main_decl to set the mangled name. */
2380 335 : DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
2381 335 : maybe_commonize_var (anon_union_decl);
2382 335 : if (TREE_STATIC (anon_union_decl) || DECL_EXTERNAL (anon_union_decl))
2383 : {
2384 215 : if (DECL_DISCRIMINATOR_P (anon_union_decl))
2385 47 : determine_local_discriminator (anon_union_decl);
2386 215 : mangle_decl (anon_union_decl);
2387 : }
2388 335 : DECL_NAME (anon_union_decl) = NULL_TREE;
2389 : }
2390 :
2391 374 : pushdecl (anon_union_decl);
2392 374 : cp_finish_decl (anon_union_decl, NULL_TREE, false, NULL_TREE, 0);
2393 : }
2394 :
2395 : /* Auxiliary functions to make type signatures for
2396 : `operator new' and `operator delete' correspond to
2397 : what compiler will be expecting. */
2398 :
2399 : tree
2400 150868 : coerce_new_type (tree type, location_t loc)
2401 : {
2402 150868 : int e = 0;
2403 150868 : tree args = TYPE_ARG_TYPES (type);
2404 :
2405 150868 : gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
2406 :
2407 150868 : if (!same_type_p (TREE_TYPE (type), ptr_type_node))
2408 : {
2409 6 : e = 1;
2410 6 : error_at (loc, "%<operator new%> must return type %qT",
2411 : ptr_type_node);
2412 : }
2413 :
2414 150868 : if (args && args != void_list_node)
2415 : {
2416 150853 : if (TREE_PURPOSE (args))
2417 : {
2418 : /* [basic.stc.dynamic.allocation]
2419 :
2420 : The first parameter shall not have an associated default
2421 : argument. */
2422 18 : error_at (loc, "the first parameter of %<operator new%> cannot "
2423 : "have a default argument");
2424 : /* Throw away the default argument. */
2425 18 : TREE_PURPOSE (args) = NULL_TREE;
2426 : }
2427 :
2428 150853 : if (!same_type_p (TREE_VALUE (args), size_type_node))
2429 : {
2430 21 : e = 2;
2431 21 : args = TREE_CHAIN (args);
2432 : }
2433 : }
2434 : else
2435 : e = 2;
2436 :
2437 21 : if (e == 2)
2438 36 : permerror (loc, "%<operator new%> takes type %<size_t%> (%qT) "
2439 : "as first parameter", size_type_node);
2440 :
2441 150868 : switch (e)
2442 : {
2443 36 : case 2:
2444 36 : args = tree_cons (NULL_TREE, size_type_node, args);
2445 : /* Fall through. */
2446 42 : case 1:
2447 42 : type = (cxx_copy_lang_qualifiers
2448 42 : (build_function_type (ptr_type_node, args),
2449 : type));
2450 : /* Fall through. */
2451 150868 : default:;
2452 : }
2453 150868 : return type;
2454 : }
2455 :
2456 : void
2457 201113 : coerce_delete_type (tree decl, location_t loc)
2458 : {
2459 201113 : int e = 0;
2460 201113 : tree type = TREE_TYPE (decl);
2461 201113 : tree args = TYPE_ARG_TYPES (type);
2462 :
2463 201113 : gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
2464 :
2465 201113 : if (!same_type_p (TREE_TYPE (type), void_type_node))
2466 : {
2467 15 : e = 1;
2468 15 : error_at (loc, "%<operator delete%> must return type %qT",
2469 : void_type_node);
2470 : }
2471 :
2472 201113 : tree ptrtype = ptr_type_node;
2473 201113 : if (destroying_delete_p (decl))
2474 : {
2475 42 : if (DECL_CLASS_SCOPE_P (decl))
2476 : /* If the function is a destroying operator delete declared in class
2477 : type C, the type of its first parameter shall be C*. */
2478 42 : ptrtype = build_pointer_type (DECL_CONTEXT (decl));
2479 : else
2480 : /* A destroying operator delete shall be a class member function named
2481 : operator delete. */
2482 0 : error_at (loc,
2483 : "destroying %<operator delete%> must be a member function");
2484 42 : const ovl_op_info_t *op = IDENTIFIER_OVL_OP_INFO (DECL_NAME (decl));
2485 42 : if (op->flags & OVL_OP_FLAG_VEC)
2486 0 : error_at (loc, "%<operator delete[]%> cannot be a destroying delete");
2487 42 : if (!usual_deallocation_fn_p (decl))
2488 0 : error_at (loc, "destroying %<operator delete%> must be a usual "
2489 : "deallocation function");
2490 : }
2491 :
2492 201110 : if (!args || args == void_list_node
2493 402220 : || !same_type_p (TREE_VALUE (args), ptrtype))
2494 : {
2495 15 : e = 2;
2496 15 : if (args && args != void_list_node)
2497 9 : args = TREE_CHAIN (args);
2498 15 : error_at (loc, "%<operator delete%> takes type %qT as first parameter",
2499 : ptrtype);
2500 : }
2501 201098 : switch (e)
2502 : {
2503 15 : case 2:
2504 15 : args = tree_cons (NULL_TREE, ptrtype, args);
2505 : /* Fall through. */
2506 30 : case 1:
2507 30 : type = (cxx_copy_lang_qualifiers
2508 30 : (build_function_type (void_type_node, args),
2509 : type));
2510 : /* Fall through. */
2511 201113 : default:;
2512 : }
2513 :
2514 201113 : TREE_TYPE (decl) = type;
2515 201113 : }
2516 :
2517 : /* DECL is a VAR_DECL for a vtable: walk through the entries in the vtable
2518 : and mark them as needed. */
2519 :
2520 : static void
2521 373967 : mark_vtable_entries (tree decl, vec<tree> &consteval_vtables)
2522 : {
2523 : /* It's OK for the vtable to refer to deprecated virtual functions. */
2524 373967 : auto du = make_temp_override (deprecated_state,
2525 373967 : UNAVAILABLE_DEPRECATED_SUPPRESS);
2526 :
2527 373967 : bool consteval_seen = false;
2528 :
2529 5865336 : for (auto &e: CONSTRUCTOR_ELTS (DECL_INITIAL (decl)))
2530 : {
2531 4743435 : tree fnaddr = e.value;
2532 :
2533 4743435 : STRIP_NOPS (fnaddr);
2534 :
2535 7212306 : if (TREE_CODE (fnaddr) != ADDR_EXPR
2536 4743435 : && TREE_CODE (fnaddr) != FDESC_EXPR)
2537 : /* This entry is an offset: a virtual base class offset, a
2538 : virtual call offset, an RTTI offset, etc. */
2539 2468871 : continue;
2540 :
2541 2274564 : tree fn = TREE_OPERAND (fnaddr, 0);
2542 4096815 : if (TREE_CODE (fn) == FUNCTION_DECL && DECL_IMMEDIATE_FUNCTION_P (fn))
2543 : {
2544 2587 : if (!consteval_seen)
2545 : {
2546 882 : consteval_seen = true;
2547 882 : consteval_vtables.safe_push (decl);
2548 : }
2549 2587 : continue;
2550 : }
2551 2271977 : TREE_ADDRESSABLE (fn) = 1;
2552 : /* When we don't have vcall offsets, we output thunks whenever
2553 : we output the vtables that contain them. With vcall offsets,
2554 : we know all the thunks we'll need when we emit a virtual
2555 : function, so we emit the thunks there instead. */
2556 2271977 : if (DECL_THUNK_P (fn))
2557 3924 : use_thunk (fn, /*emit_p=*/0);
2558 : /* Set the location, as marking the function could cause
2559 : instantiation. We do not need to preserve the incoming
2560 : location, as we're called from c_parse_final_cleanups, which
2561 : takes care of that. */
2562 2271977 : input_location = DECL_SOURCE_LOCATION (fn);
2563 2271977 : mark_used (fn);
2564 : }
2565 373967 : }
2566 :
2567 : /* Replace any consteval functions in vtables with null pointers. */
2568 :
2569 : static void
2570 100480 : clear_consteval_vfns (vec<tree> &consteval_vtables)
2571 : {
2572 103088 : for (tree vtable : consteval_vtables)
2573 7022 : for (constructor_elt &elt : CONSTRUCTOR_ELTS (DECL_INITIAL (vtable)))
2574 : {
2575 4376 : tree fn = cp_get_fndecl_from_callee (elt.value, /*fold*/false);
2576 6982 : if (fn && DECL_IMMEDIATE_FUNCTION_P (fn))
2577 2591 : elt.value = build_zero_cst (vtable_entry_type);
2578 : }
2579 100480 : }
2580 :
2581 : /* Adjust the TLS model on variable DECL if need be, typically after
2582 : the linkage of DECL has been modified. */
2583 :
2584 : static void
2585 60080812 : adjust_var_decl_tls_model (tree decl)
2586 : {
2587 60080812 : if (CP_DECL_THREAD_LOCAL_P (decl)
2588 60080812 : && !lookup_attribute ("tls_model", DECL_ATTRIBUTES (decl)))
2589 297 : set_decl_tls_model (decl, decl_default_tls_model (decl));
2590 60080812 : }
2591 :
2592 : /* Set DECL up to have the closest approximation of "initialized common"
2593 : linkage available. */
2594 :
2595 : void
2596 111280750 : comdat_linkage (tree decl)
2597 : {
2598 111280750 : if (flag_weak)
2599 111280726 : make_decl_one_only (decl, cxx_comdat_group (decl));
2600 24 : else if (TREE_CODE (decl) == FUNCTION_DECL
2601 24 : || (VAR_P (decl) && DECL_ARTIFICIAL (decl)))
2602 : /* We can just emit function and compiler-generated variables
2603 : statically; having multiple copies is (for the most part) only
2604 : a waste of space.
2605 :
2606 : There are two correctness issues, however: the address of a
2607 : template instantiation with external linkage should be the
2608 : same, independent of what translation unit asks for the
2609 : address, and this will not hold when we emit multiple copies of
2610 : the function. However, there's little else we can do.
2611 :
2612 : Also, by default, the typeinfo implementation assumes that
2613 : there will be only one copy of the string used as the name for
2614 : each type. Therefore, if weak symbols are unavailable, the
2615 : run-time library should perform a more conservative check; it
2616 : should perform a string comparison, rather than an address
2617 : comparison. */
2618 24 : TREE_PUBLIC (decl) = 0;
2619 : else
2620 : {
2621 : /* Static data member template instantiations, however, cannot
2622 : have multiple copies. */
2623 0 : if (DECL_INITIAL (decl) == 0
2624 0 : || DECL_INITIAL (decl) == error_mark_node)
2625 0 : DECL_COMMON (decl) = 1;
2626 0 : else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
2627 : {
2628 0 : DECL_COMMON (decl) = 1;
2629 0 : DECL_INITIAL (decl) = error_mark_node;
2630 : }
2631 0 : else if (!DECL_EXPLICIT_INSTANTIATION (decl))
2632 : {
2633 : /* We can't do anything useful; leave vars for explicit
2634 : instantiation. */
2635 0 : DECL_EXTERNAL (decl) = 1;
2636 0 : DECL_NOT_REALLY_EXTERN (decl) = 0;
2637 : }
2638 : }
2639 :
2640 111280750 : if (TREE_PUBLIC (decl))
2641 111280726 : DECL_COMDAT (decl) = 1;
2642 :
2643 111280750 : if (VAR_P (decl))
2644 60080047 : adjust_var_decl_tls_model (decl);
2645 111280750 : }
2646 :
2647 : /* For win32 we also want to put explicit instantiations in
2648 : linkonce sections, so that they will be merged with implicit
2649 : instantiations; otherwise we get duplicate symbol errors.
2650 : For Darwin we do not want explicit instantiations to be
2651 : linkonce. */
2652 :
2653 : void
2654 738852 : maybe_make_one_only (tree decl)
2655 : {
2656 : /* We used to say that this was not necessary on targets that support weak
2657 : symbols, because the implicit instantiations will defer to the explicit
2658 : one. However, that's not actually the case in SVR4; a strong definition
2659 : after a weak one is an error. Also, not making explicit
2660 : instantiations one_only means that we can end up with two copies of
2661 : some template instantiations. */
2662 738852 : if (! flag_weak)
2663 : return;
2664 :
2665 : /* These are not to be output. */
2666 738849 : if (consteval_only_p (decl))
2667 : return;
2668 :
2669 : /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
2670 : we can get away with not emitting them if they aren't used. We need
2671 : to for variables so that cp_finish_decl will update their linkage,
2672 : because their DECL_INITIAL may not have been set properly yet. */
2673 :
2674 731041 : if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
2675 : || (! DECL_EXPLICIT_INSTANTIATION (decl)
2676 : && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
2677 : {
2678 731041 : make_decl_one_only (decl, cxx_comdat_group (decl));
2679 :
2680 731041 : if (VAR_P (decl))
2681 : {
2682 765 : varpool_node *node = varpool_node::get_create (decl);
2683 765 : DECL_COMDAT (decl) = 1;
2684 : /* Mark it needed so we don't forget to emit it. */
2685 765 : node->forced_by_abi = true;
2686 765 : TREE_USED (decl) = 1;
2687 :
2688 765 : adjust_var_decl_tls_model (decl);
2689 : }
2690 : }
2691 : }
2692 :
2693 : /* Returns true iff DECL, a FUNCTION_DECL or VAR_DECL, has vague linkage.
2694 : This predicate will give the right answer during parsing of the
2695 : function, which other tests may not. */
2696 :
2697 : bool
2698 37661069 : vague_linkage_p (tree decl)
2699 : {
2700 37661072 : if (!TREE_PUBLIC (decl))
2701 : {
2702 : /* maybe_thunk_body clears TREE_PUBLIC and DECL_ABSTRACT_P on the
2703 : maybe-in-charge 'tor variants; in that case we need to check one of
2704 : the "clones" for the real linkage. But only in that case; before
2705 : maybe_clone_body we haven't yet copied the linkage to the clones. */
2706 9244 : if (DECL_MAYBE_IN_CHARGE_CDTOR_P (decl)
2707 323 : && !DECL_ABSTRACT_P (decl)
2708 3 : && DECL_CHAIN (decl)
2709 4777 : && DECL_CLONED_FUNCTION_P (DECL_CHAIN (decl)))
2710 3 : return vague_linkage_p (DECL_CHAIN (decl));
2711 :
2712 4771 : gcc_checking_assert (!DECL_COMDAT (decl));
2713 : return false;
2714 : }
2715 : /* Unfortunately, import_export_decl has not always been called
2716 : before the function is processed, so we cannot simply check
2717 : DECL_COMDAT. */
2718 37656298 : if (DECL_COMDAT (decl)
2719 963109 : || (TREE_CODE (decl) == FUNCTION_DECL
2720 950982 : && DECL_NONGNU_INLINE_P (decl))
2721 67057 : || (DECL_LANG_SPECIFIC (decl)
2722 66462 : && DECL_TEMPLOID_INSTANTIATION (decl))
2723 37694435 : || (VAR_P (decl) && DECL_INLINE_VAR_P (decl)))
2724 37623763 : return true;
2725 32535 : else if (DECL_FUNCTION_SCOPE_P (decl))
2726 : /* A local static in an inline effectively has vague linkage. */
2727 0 : return (TREE_STATIC (decl)
2728 0 : && vague_linkage_p (DECL_CONTEXT (decl)));
2729 : else
2730 : return false;
2731 : }
2732 :
2733 : /* Determine whether or not we want to specifically import or export CTYPE,
2734 : using various heuristics. */
2735 :
2736 : static void
2737 3960359 : import_export_class (tree ctype)
2738 : {
2739 : /* -1 for imported, 1 for exported. */
2740 3960359 : int import_export = 0;
2741 :
2742 : /* It only makes sense to call this function at EOF. The reason is
2743 : that this function looks at whether or not the first non-inline
2744 : non-abstract virtual member function has been defined in this
2745 : translation unit. But, we can't possibly know that until we've
2746 : seen the entire translation unit. */
2747 3960359 : gcc_assert (at_eof);
2748 :
2749 3960359 : if (CLASSTYPE_INTERFACE_KNOWN (ctype))
2750 : return;
2751 :
2752 : /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
2753 : we will have CLASSTYPE_INTERFACE_ONLY set but not
2754 : CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
2755 : heuristic because someone will supply a #pragma implementation
2756 : elsewhere, and deducing it here would produce a conflict. */
2757 2149670 : if (CLASSTYPE_INTERFACE_ONLY (ctype))
2758 : return;
2759 :
2760 2149670 : if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
2761 : import_export = -1;
2762 2149670 : else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
2763 : import_export = 1;
2764 2149670 : else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
2765 2149670 : && !flag_implicit_templates)
2766 : /* For a template class, without -fimplicit-templates, check the
2767 : repository. If the virtual table is assigned to this
2768 : translation unit, then export the class; otherwise, import
2769 : it. */
2770 : import_export = -1;
2771 2149027 : else if (TYPE_CONTAINS_VPTR_P (ctype))
2772 : {
2773 1976765 : tree cdecl = TYPE_NAME (ctype);
2774 1980540 : if (DECL_LANG_SPECIFIC (cdecl) && DECL_MODULE_ATTACH_P (cdecl))
2775 : /* For class types attached to a named module, the ABI specifies
2776 : that the tables are uniquely emitted in the object for the
2777 : module unit in which it is defined. */
2778 1746 : import_export = (DECL_MODULE_IMPORT_P (cdecl) ? -1 : 1);
2779 : else
2780 : {
2781 : /* The ABI specifies that the virtual table and associated
2782 : information are emitted with the key method, if any. */
2783 1976570 : tree method = CLASSTYPE_KEY_METHOD (ctype);
2784 : /* If weak symbol support is not available, then we must be
2785 : careful not to emit the vtable when the key function is
2786 : inline. An inline function can be defined in multiple
2787 : translation units. If we were to emit the vtable in each
2788 : translation unit containing a definition, we would get
2789 : multiple definition errors at link-time. */
2790 1952717 : if (method && (flag_weak || ! DECL_NONGNU_INLINE_P (method)))
2791 590456 : import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
2792 : }
2793 : }
2794 :
2795 : /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
2796 : a definition anywhere else. */
2797 2149670 : if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
2798 : import_export = 0;
2799 :
2800 : /* Allow back ends the chance to overrule the decision. */
2801 2149670 : if (targetm.cxx.import_export_class)
2802 0 : import_export = targetm.cxx.import_export_class (ctype, import_export);
2803 :
2804 2149670 : if (import_export)
2805 : {
2806 591294 : SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
2807 591294 : CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
2808 : }
2809 : }
2810 :
2811 : /* Return true if VAR has already been provided to the back end; in that
2812 : case VAR should not be modified further by the front end. */
2813 : static bool
2814 105372800 : var_finalized_p (tree var)
2815 : {
2816 0 : return varpool_node::get_create (var)->definition;
2817 : }
2818 :
2819 : /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
2820 : must be emitted in this translation unit. Mark it as such. */
2821 :
2822 : void
2823 50380 : mark_needed (tree decl)
2824 : {
2825 : /* These are not to be output. */
2826 50380 : if (consteval_only_p (decl))
2827 : return;
2828 :
2829 50370 : TREE_USED (decl) = 1;
2830 50370 : if (TREE_CODE (decl) == FUNCTION_DECL)
2831 : {
2832 : /* Extern inline functions don't become needed when referenced.
2833 : If we know a method will be emitted in other TU and no new
2834 : functions can be marked reachable, just use the external
2835 : definition. */
2836 42168 : struct cgraph_node *node = cgraph_node::get_create (decl);
2837 42168 : node->forced_by_abi = true;
2838 :
2839 : /* #pragma interface can call mark_needed for
2840 : maybe-in-charge 'tors; mark the clones as well. */
2841 42168 : tree clone;
2842 50604 : FOR_EACH_CLONE (clone, decl)
2843 8436 : mark_needed (clone);
2844 : }
2845 8202 : else if (VAR_P (decl))
2846 : {
2847 8202 : varpool_node *node = varpool_node::get_create (decl);
2848 : /* C++ frontend use mark_decl_references to force COMDAT variables
2849 : to be output that might appear dead otherwise. */
2850 8202 : node->forced_by_abi = true;
2851 : }
2852 : }
2853 :
2854 : /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
2855 : returns true if a definition of this entity should be provided in
2856 : this object file. Callers use this function to determine whether
2857 : or not to let the back end know that a definition of DECL is
2858 : available in this translation unit. */
2859 :
2860 : bool
2861 330029254 : decl_needed_p (tree decl)
2862 : {
2863 330029254 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
2864 : /* This function should only be called at the end of the translation
2865 : unit. We cannot be sure of whether or not something will be
2866 : COMDAT until that point. */
2867 330029254 : gcc_assert (at_eof);
2868 :
2869 : /* All entities with external linkage that are not COMDAT/EXTERN should be
2870 : emitted; they may be referred to from other object files. */
2871 330029254 : if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_REALLY_EXTERN (decl))
2872 : return true;
2873 :
2874 : /* Functions marked "dllexport" must be emitted so that they are
2875 : visible to other DLLs. */
2876 330028974 : if (flag_keep_inline_dllexport
2877 330028974 : && lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)))
2878 : return true;
2879 :
2880 : /* When not optimizing, do not bother to produce definitions for extern
2881 : symbols. */
2882 407984604 : if (DECL_REALLY_EXTERN (decl)
2883 0 : && ((TREE_CODE (decl) != FUNCTION_DECL
2884 0 : && !optimize)
2885 0 : || (TREE_CODE (decl) == FUNCTION_DECL
2886 0 : && !opt_for_fn (decl, optimize)))
2887 330028974 : && !lookup_attribute ("always_inline", decl))
2888 : return false;
2889 :
2890 : /* If this entity was used, let the back end see it; it will decide
2891 : whether or not to emit it into the object file. */
2892 330028974 : if (TREE_USED (decl))
2893 : return true;
2894 :
2895 : /* Virtual functions might be needed for devirtualization. */
2896 68462731 : if (flag_devirtualize
2897 65901421 : && TREE_CODE (decl) == FUNCTION_DECL
2898 133159879 : && DECL_VIRTUAL_P (decl))
2899 : return true;
2900 :
2901 : /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
2902 : reference to DECL might cause it to be emitted later. */
2903 : return false;
2904 : }
2905 :
2906 : /* If necessary, write out the vtables for the dynamic class CTYPE.
2907 : Returns true if any vtables were emitted. */
2908 :
2909 : static bool
2910 3707934 : maybe_emit_vtables (tree ctype, vec<tree> &consteval_vtables)
2911 : {
2912 3707934 : tree vtbl;
2913 3707934 : tree primary_vtbl;
2914 3707934 : int needed = 0;
2915 3707934 : varpool_node *current = NULL, *last = NULL;
2916 :
2917 : /* If the vtables for this class have already been emitted there is
2918 : nothing more to do. */
2919 3707934 : primary_vtbl = CLASSTYPE_VTABLES (ctype);
2920 3707934 : if (var_finalized_p (primary_vtbl))
2921 : return false;
2922 : /* Ignore dummy vtables made by get_vtable_decl. */
2923 3707934 : if (TREE_TYPE (primary_vtbl) == void_type_node)
2924 : return false;
2925 :
2926 : /* On some targets, we cannot determine the key method until the end
2927 : of the translation unit -- which is when this function is
2928 : called. */
2929 3707934 : if (!targetm.cxx.key_method_may_be_inline ())
2930 0 : determine_key_method (ctype);
2931 :
2932 : /* See if any of the vtables are needed. */
2933 9072740 : for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = DECL_CHAIN (vtbl))
2934 : {
2935 5364806 : import_export_decl (vtbl);
2936 5364806 : if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
2937 : needed = 1;
2938 : }
2939 3707934 : if (!needed)
2940 : {
2941 : /* If the references to this class' vtables are optimized away,
2942 : still emit the appropriate debugging information. See
2943 : dfs_debug_mark. */
2944 3354276 : if (DECL_COMDAT (primary_vtbl)
2945 3354276 : && CLASSTYPE_DEBUG_REQUESTED (ctype))
2946 38692 : note_debug_info_needed (ctype);
2947 3354276 : return false;
2948 : }
2949 :
2950 : /* The ABI requires that we emit all of the vtables if we emit any
2951 : of them. */
2952 727625 : for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = DECL_CHAIN (vtbl))
2953 : {
2954 : /* Mark entities references from the virtual table as used. */
2955 373967 : mark_vtable_entries (vtbl, consteval_vtables);
2956 :
2957 373967 : if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
2958 : {
2959 0 : vec<tree, va_gc> *cleanups = NULL;
2960 0 : tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl), &cleanups,
2961 : LOOKUP_NORMAL);
2962 :
2963 : /* It had better be all done at compile-time. */
2964 0 : gcc_assert (!expr && !cleanups);
2965 : }
2966 :
2967 : /* Write it out. */
2968 373967 : DECL_EXTERNAL (vtbl) = 0;
2969 373967 : rest_of_decl_compilation (vtbl, 1, 1);
2970 :
2971 : /* Because we're only doing syntax-checking, we'll never end up
2972 : actually marking the variable as written. */
2973 373967 : if (flag_syntax_only)
2974 33 : TREE_ASM_WRITTEN (vtbl) = 1;
2975 373934 : else if (DECL_ONE_ONLY (vtbl))
2976 : {
2977 373208 : current = varpool_node::get_create (vtbl);
2978 373208 : if (last)
2979 20215 : current->add_to_same_comdat_group (last);
2980 : last = current;
2981 : }
2982 : }
2983 :
2984 : /* For abstract classes, the destructor has been removed from the
2985 : vtable (in class.cc's build_vtbl_initializer). For a compiler-
2986 : generated destructor, it hence might not have been generated in
2987 : this translation unit - and with '#pragma interface' it might
2988 : never get generated. */
2989 353658 : if (CLASSTYPE_PURE_VIRTUALS (ctype)
2990 111771 : && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (ctype)
2991 70561 : && !CLASSTYPE_LAZY_DESTRUCTOR (ctype)
2992 424216 : && DECL_DEFAULTED_IN_CLASS_P (CLASSTYPE_DESTRUCTOR (ctype)))
2993 66 : note_vague_linkage_fn (CLASSTYPE_DESTRUCTOR (ctype));
2994 :
2995 : /* Since we're writing out the vtable here, also write the debug
2996 : info. */
2997 353658 : note_debug_info_needed (ctype);
2998 :
2999 353658 : return true;
3000 : }
3001 :
3002 : /* A special return value from type_visibility meaning internal
3003 : linkage. */
3004 :
3005 : enum { VISIBILITY_ANON = VISIBILITY_INTERNAL+1 };
3006 :
3007 : static int expr_visibility (tree);
3008 : static int type_visibility (tree);
3009 :
3010 : /* walk_tree helper function for type_visibility. */
3011 :
3012 : static tree
3013 4076678554 : min_vis_r (tree *tp, int *walk_subtrees, void *data)
3014 : {
3015 4076678554 : int *vis_p = (int *)data;
3016 4076678554 : int this_vis = VISIBILITY_DEFAULT;
3017 4076678554 : if (! TYPE_P (*tp))
3018 809469121 : *walk_subtrees = 0;
3019 3267209433 : else if (OVERLOAD_TYPE_P (*tp)
3020 4275404852 : && !TREE_PUBLIC (TYPE_MAIN_DECL (*tp)))
3021 : {
3022 998650 : this_vis = VISIBILITY_ANON;
3023 998650 : *walk_subtrees = 0;
3024 : }
3025 3266210783 : else if (CLASS_TYPE_P (*tp))
3026 : {
3027 979824070 : this_vis = CLASSTYPE_VISIBILITY (*tp);
3028 979824070 : *walk_subtrees = 0;
3029 : }
3030 2286386713 : else if (TREE_CODE (*tp) == ARRAY_TYPE
3031 2286386713 : && uses_template_parms (TYPE_DOMAIN (*tp)))
3032 418289 : this_vis = expr_visibility (TYPE_MAX_VALUE (TYPE_DOMAIN (*tp)));
3033 :
3034 4076678554 : if (this_vis > *vis_p)
3035 1688765 : *vis_p = this_vis;
3036 :
3037 : /* Tell cp_walk_subtrees to look through typedefs. */
3038 4076678554 : if (*walk_subtrees == 1)
3039 2286386713 : *walk_subtrees = 2;
3040 :
3041 4076678554 : return NULL;
3042 : }
3043 :
3044 : /* walk_tree helper function for expr_visibility. */
3045 :
3046 : static tree
3047 262320184 : min_vis_expr_r (tree *tp, int *walk_subtrees, void *data)
3048 : {
3049 262320184 : int *vis_p = (int *)data;
3050 262320184 : int tpvis = VISIBILITY_DEFAULT;
3051 :
3052 262320184 : tree t = *tp;
3053 262320184 : if (TREE_CODE (t) == PTRMEM_CST)
3054 1372 : t = PTRMEM_CST_MEMBER (t);
3055 :
3056 262320184 : if (TREE_CODE (t) == TEMPLATE_DECL)
3057 : {
3058 7040685 : if (DECL_ALIAS_TEMPLATE_P (t) || concept_definition_p (t))
3059 : /* FIXME: We don't maintain TREE_PUBLIC / DECL_VISIBILITY for
3060 : alias templates so we can't trust it here (PR107906). Ditto
3061 : for concepts. */
3062 : return NULL_TREE;
3063 : t = DECL_TEMPLATE_RESULT (t);
3064 : if (!t)
3065 : return NULL_TREE;
3066 : }
3067 :
3068 261585181 : switch (TREE_CODE (t))
3069 : {
3070 8582753 : case CAST_EXPR:
3071 8582753 : case IMPLICIT_CONV_EXPR:
3072 8582753 : case STATIC_CAST_EXPR:
3073 8582753 : case REINTERPRET_CAST_EXPR:
3074 8582753 : case CONST_CAST_EXPR:
3075 8582753 : case DYNAMIC_CAST_EXPR:
3076 8582753 : case NEW_EXPR:
3077 8582753 : case CONSTRUCTOR:
3078 8582753 : case LAMBDA_EXPR:
3079 8582753 : case TYPE_DECL:
3080 8582753 : tpvis = type_visibility (TREE_TYPE (t));
3081 8582753 : break;
3082 :
3083 8234 : case ADDR_EXPR:
3084 8234 : t = TREE_OPERAND (t, 0);
3085 8234 : if (VAR_P (t))
3086 : /* If a variable has its address taken, the lvalue-rvalue conversion is
3087 : not applied, so skip that case. */
3088 4783 : goto addressable;
3089 : break;
3090 :
3091 8935022 : case VAR_DECL:
3092 8935022 : case FUNCTION_DECL:
3093 8935022 : if (decl_constant_var_p (t))
3094 : /* The ODR allows definitions in different TUs to refer to distinct
3095 : constant variables with internal or no linkage, so such a reference
3096 : shouldn't affect visibility if the lvalue-rvalue conversion is
3097 : applied (PR110323). We still want to restrict visibility according
3098 : to the type of the declaration however. */
3099 : {
3100 5153412 : tpvis = type_visibility (TREE_TYPE (t));
3101 5153412 : break;
3102 : }
3103 3781610 : addressable:
3104 : /* For _DECLs with no linkage refer to the linkage of the containing
3105 : entity that does have a name with linkage. */
3106 3786807 : if (decl_linkage (t) == lk_none)
3107 29441 : tpvis = expr_visibility (DECL_CONTEXT (t));
3108 : /* Decls that have had their visibility constrained will report
3109 : as external linkage, but we still want to transitively constrain
3110 : if we refer to them, so just check TREE_PUBLIC instead. */
3111 3757366 : else if (!TREE_PUBLIC (t))
3112 : tpvis = VISIBILITY_ANON;
3113 : else
3114 3755785 : tpvis = DECL_VISIBILITY (t);
3115 : break;
3116 :
3117 2024 : case FIELD_DECL:
3118 2024 : tpvis = type_visibility (DECL_CONTEXT (t));
3119 2024 : break;
3120 :
3121 1852 : case REFLECT_EXPR:
3122 1852 : tree r;
3123 1852 : r = REFLECT_EXPR_HANDLE (t);
3124 1852 : switch (REFLECT_EXPR_KIND (t))
3125 : {
3126 48 : case REFLECT_BASE:
3127 : /* For direct base class relationship, determine visibility
3128 : from both D and B types. */
3129 48 : tpvis = type_visibility (BINFO_TYPE (r));
3130 48 : if (tpvis > *vis_p)
3131 2 : *vis_p = tpvis;
3132 48 : tpvis = type_visibility (direct_base_derived (r));
3133 48 : *walk_subtrees = 0;
3134 48 : break;
3135 38 : case REFLECT_DATA_MEMBER_SPEC:
3136 : /* For data member description determine visibility
3137 : from the type. */
3138 38 : tpvis = type_visibility (TREE_VEC_ELT (r, 0));
3139 38 : *walk_subtrees = 0;
3140 38 : break;
3141 90 : case REFLECT_PARM:
3142 : /* For function parameter reflection determine visibility
3143 : based on parent_of. */
3144 90 : tpvis = expr_visibility (DECL_CONTEXT (r));
3145 90 : *walk_subtrees = 0;
3146 90 : break;
3147 6 : case REFLECT_ANNOTATION:
3148 : /* Annotations are always local to the TU. */
3149 6 : tpvis = VISIBILITY_ANON;
3150 6 : *walk_subtrees = 0;
3151 6 : break;
3152 20 : case REFLECT_OBJECT:
3153 20 : r = get_base_address (r);
3154 1670 : gcc_fallthrough ();
3155 1670 : default:
3156 1670 : if (TYPE_P (r))
3157 : {
3158 338 : tpvis = type_visibility (r);
3159 338 : *walk_subtrees = 0;
3160 338 : break;
3161 : }
3162 1332 : if (VAR_P (r) || TREE_CODE (r) == PARM_DECL)
3163 : {
3164 414 : t = r;
3165 414 : goto addressable;
3166 : }
3167 : break;
3168 : }
3169 : break;
3170 :
3171 : default:
3172 : break;
3173 : }
3174 :
3175 261585181 : if (tpvis > *vis_p)
3176 3595 : *vis_p = tpvis;
3177 :
3178 : return NULL_TREE;
3179 : }
3180 :
3181 : /* Returns the visibility of TYPE, which is the minimum visibility of its
3182 : component types. */
3183 :
3184 : static int
3185 1177151180 : type_visibility (tree type)
3186 : {
3187 1177151180 : int vis = VISIBILITY_DEFAULT;
3188 1177151180 : cp_walk_tree_without_duplicates (&type, min_vis_r, &vis);
3189 1177151180 : return vis;
3190 : }
3191 :
3192 : /* Returns the visibility of an expression EXPR that appears in the signature
3193 : of a function template, which is the minimum visibility of names that appear
3194 : in its mangling. */
3195 :
3196 : static int
3197 88782138 : expr_visibility (tree expr)
3198 : {
3199 88782138 : int vis = VISIBILITY_DEFAULT;
3200 88782138 : cp_walk_tree_without_duplicates (&expr, min_vis_expr_r, &vis);
3201 88782138 : return vis;
3202 : }
3203 :
3204 : /* Limit the visibility of DECL to VISIBILITY, if not explicitly
3205 : specified (or if VISIBILITY is static). If TMPL is true, this
3206 : constraint is for a template argument, and takes precedence
3207 : over explicitly-specified visibility on the template. */
3208 :
3209 : static void
3210 78573699 : constrain_visibility (tree decl, int visibility, bool tmpl)
3211 : {
3212 78573699 : if (visibility == VISIBILITY_ANON)
3213 : {
3214 : /* extern "C" declarations aren't affected by the anonymous
3215 : namespace. */
3216 1441940 : if (!DECL_EXTERN_C_P (decl))
3217 : {
3218 1441764 : TREE_PUBLIC (decl) = 0;
3219 1441764 : DECL_WEAK (decl) = 0;
3220 1441764 : DECL_COMMON (decl) = 0;
3221 1441764 : DECL_COMDAT (decl) = false;
3222 1441764 : if (VAR_OR_FUNCTION_DECL_P (decl))
3223 : {
3224 439628 : struct symtab_node *snode = symtab_node::get (decl);
3225 :
3226 439628 : if (snode)
3227 37374 : snode->set_comdat_group (NULL);
3228 : }
3229 1441764 : DECL_INTERFACE_KNOWN (decl) = 1;
3230 1441764 : if (DECL_LANG_SPECIFIC (decl))
3231 443420 : DECL_NOT_REALLY_EXTERN (decl) = 1;
3232 : }
3233 : }
3234 77131759 : else if (visibility > DECL_VISIBILITY (decl)
3235 77131759 : && (tmpl || !DECL_VISIBILITY_SPECIFIED (decl)))
3236 : {
3237 309 : DECL_VISIBILITY (decl) = (enum symbol_visibility) visibility;
3238 : /* This visibility was not specified. */
3239 309 : DECL_VISIBILITY_SPECIFIED (decl) = false;
3240 : }
3241 78573699 : }
3242 :
3243 : /* Constrain the visibility of DECL based on the visibility of its template
3244 : arguments. */
3245 :
3246 : static void
3247 356090907 : constrain_visibility_for_template (tree decl, tree targs)
3248 : {
3249 : /* If this is a template instantiation, check the innermost
3250 : template args for visibility constraints. The outer template
3251 : args are covered by the class check. */
3252 356090907 : tree args = INNERMOST_TEMPLATE_ARGS (targs);
3253 356090907 : int i;
3254 1037581816 : for (i = TREE_VEC_LENGTH (args); i > 0; --i)
3255 : {
3256 681490909 : int vis = 0;
3257 :
3258 681490909 : tree arg = TREE_VEC_ELT (args, i-1);
3259 681490909 : if (TYPE_P (arg))
3260 594773908 : vis = type_visibility (arg);
3261 : else
3262 86717001 : vis = expr_visibility (arg);
3263 681490909 : if (vis)
3264 376614 : constrain_visibility (decl, vis, true);
3265 : }
3266 356090907 : }
3267 :
3268 : /* Like c_determine_visibility, but with additional C++-specific
3269 : behavior.
3270 :
3271 : Function-scope entities can rely on the function's visibility because
3272 : it is set in start_preparsed_function.
3273 :
3274 : Class-scope entities cannot rely on the class's visibility until the end
3275 : of the enclosing class definition.
3276 :
3277 : Note that because namespaces have multiple independent definitions,
3278 : namespace visibility is handled elsewhere using the #pragma visibility
3279 : machinery rather than by decorating the namespace declaration.
3280 :
3281 : The goal is for constraints from the type to give a diagnostic, and
3282 : other constraints to be applied silently. */
3283 :
3284 : void
3285 705097288 : determine_visibility (tree decl)
3286 : {
3287 : /* Remember that all decls get VISIBILITY_DEFAULT when built. */
3288 :
3289 : /* Only relevant for names with external linkage. */
3290 705097288 : if (!TREE_PUBLIC (decl))
3291 : return;
3292 :
3293 : /* Cloned constructors and destructors get the same visibility as
3294 : the underlying function. That should be set up in
3295 : maybe_clone_body. */
3296 655307146 : gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
3297 :
3298 655307146 : bool orig_visibility_specified = DECL_VISIBILITY_SPECIFIED (decl);
3299 655307146 : enum symbol_visibility orig_visibility = DECL_VISIBILITY (decl);
3300 :
3301 : /* The decl may be a template instantiation, which could influence
3302 : visibility. */
3303 655307146 : tree template_decl = NULL_TREE;
3304 655307146 : if (TREE_CODE (decl) == TYPE_DECL)
3305 : {
3306 181668736 : if (CLASS_TYPE_P (TREE_TYPE (decl)))
3307 : {
3308 178563339 : if (CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl)))
3309 363965101 : template_decl = decl;
3310 : }
3311 3105397 : else if (TYPE_TEMPLATE_INFO (TREE_TYPE (decl)))
3312 363965101 : template_decl = decl;
3313 : }
3314 473638410 : else if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3315 : template_decl = decl;
3316 :
3317 655307146 : if (TREE_CODE (decl) == TYPE_DECL
3318 359096943 : && LAMBDA_TYPE_P (TREE_TYPE (decl))
3319 658556171 : && CLASSTYPE_LAMBDA_EXPR (TREE_TYPE (decl)) != error_mark_node)
3320 3243128 : if (tree extra = LAMBDA_TYPE_EXTRA_SCOPE (TREE_TYPE (decl)))
3321 : {
3322 : /* The lambda's visibility is limited by that of its extra
3323 : scope. */
3324 1617317 : int vis = 0;
3325 1617317 : if (TYPE_P (extra))
3326 0 : vis = type_visibility (extra);
3327 : else
3328 1617317 : vis = expr_visibility (extra);
3329 1617317 : constrain_visibility (decl, vis, false);
3330 : }
3331 :
3332 : /* If DECL is a member of a class, visibility specifiers on the
3333 : class can influence the visibility of the DECL. */
3334 655307146 : tree class_type = NULL_TREE;
3335 655307146 : if (DECL_CLASS_SCOPE_P (decl))
3336 333085517 : class_type = DECL_CONTEXT (decl);
3337 : else
3338 : {
3339 : /* Not a class member. */
3340 :
3341 : /* Virtual tables have DECL_CONTEXT set to their associated class,
3342 : so they are automatically handled above. */
3343 322221629 : gcc_assert (!VAR_P (decl)
3344 : || !DECL_VTABLE_OR_VTT_P (decl));
3345 :
3346 322221629 : if (DECL_FUNCTION_SCOPE_P (decl) && ! DECL_VISIBILITY_SPECIFIED (decl))
3347 : {
3348 : /* Local statics and classes get the visibility of their
3349 : containing function by default, except that
3350 : -fvisibility-inlines-hidden doesn't affect them. */
3351 2482446 : tree fn = DECL_CONTEXT (decl);
3352 2482446 : if (DECL_VISIBILITY_SPECIFIED (fn))
3353 : {
3354 2395568 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
3355 2395568 : DECL_VISIBILITY_SPECIFIED (decl) =
3356 2395568 : DECL_VISIBILITY_SPECIFIED (fn);
3357 : }
3358 : else
3359 : {
3360 86878 : if (DECL_CLASS_SCOPE_P (fn))
3361 48873 : determine_visibility_from_class (decl, DECL_CONTEXT (fn));
3362 38005 : else if (determine_hidden_inline (fn))
3363 : {
3364 6 : DECL_VISIBILITY (decl) = default_visibility;
3365 6 : DECL_VISIBILITY_SPECIFIED (decl) =
3366 6 : visibility_options.inpragma;
3367 : }
3368 : else
3369 : {
3370 37999 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
3371 37999 : DECL_VISIBILITY_SPECIFIED (decl) =
3372 37999 : DECL_VISIBILITY_SPECIFIED (fn);
3373 : }
3374 : }
3375 :
3376 : /* Local classes in templates have CLASSTYPE_USE_TEMPLATE set,
3377 : but have no TEMPLATE_INFO, so don't try to check it. */
3378 : template_decl = NULL_TREE;
3379 : }
3380 48799892 : else if (VAR_P (decl) && DECL_TINFO_P (decl)
3381 324826079 : && flag_visibility_ms_compat)
3382 : {
3383 : /* Under -fvisibility-ms-compat, types are visible by default,
3384 : even though their contents aren't. */
3385 84 : tree underlying_type = TREE_TYPE (DECL_NAME (decl));
3386 84 : int underlying_vis = type_visibility (underlying_type);
3387 84 : if (underlying_vis == VISIBILITY_ANON
3388 84 : || (CLASS_TYPE_P (underlying_type)
3389 69 : && CLASSTYPE_VISIBILITY_SPECIFIED (underlying_type)))
3390 54 : constrain_visibility (decl, underlying_vis, false);
3391 : else
3392 30 : DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3393 : }
3394 319739099 : else if (VAR_P (decl) && DECL_TINFO_P (decl))
3395 : {
3396 : /* tinfo visibility is based on the type it's for. */
3397 5086812 : constrain_visibility
3398 5086812 : (decl, type_visibility (TREE_TYPE (DECL_NAME (decl))), false);
3399 :
3400 : /* Give the target a chance to override the visibility associated
3401 : with DECL. */
3402 5086812 : if (TREE_PUBLIC (decl)
3403 5084900 : && !DECL_REALLY_EXTERN (decl)
3404 5084900 : && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl)))
3405 10140616 : && !CLASSTYPE_VISIBILITY_SPECIFIED (TREE_TYPE (DECL_NAME (decl))))
3406 110295 : targetm.cxx.determine_class_data_visibility (decl);
3407 : }
3408 314652287 : else if (template_decl)
3409 : /* Template instantiations and specializations get visibility based
3410 : on their template unless they override it with an attribute. */;
3411 105858984 : else if (! DECL_VISIBILITY_SPECIFIED (decl))
3412 : {
3413 97573524 : if (determine_hidden_inline (decl))
3414 12 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3415 : else
3416 : {
3417 : /* Set default visibility to whatever the user supplied with
3418 : #pragma GCC visibility or a namespace visibility attribute. */
3419 97573512 : DECL_VISIBILITY (decl) = default_visibility;
3420 97573512 : DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma;
3421 : }
3422 : }
3423 : }
3424 :
3425 444031397 : if (template_decl)
3426 : {
3427 : /* If the specialization doesn't specify visibility, use the
3428 : visibility from the template. */
3429 363347662 : tree tinfo = get_template_info (template_decl);
3430 363347662 : tree args = TI_ARGS (tinfo);
3431 363347662 : tree attribs = (TREE_CODE (decl) == TYPE_DECL
3432 363347662 : ? TYPE_ATTRIBUTES (TREE_TYPE (decl))
3433 363347662 : : DECL_ATTRIBUTES (decl));
3434 363347662 : tree attr = lookup_attribute ("visibility", attribs);
3435 :
3436 363347662 : if (args != error_mark_node)
3437 : {
3438 363347662 : tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
3439 :
3440 363347662 : if (!DECL_VISIBILITY_SPECIFIED (decl))
3441 : {
3442 163998360 : if (!attr
3443 163998360 : && determine_hidden_inline (decl))
3444 33 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3445 : else
3446 : {
3447 163998327 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (pattern);
3448 327996654 : DECL_VISIBILITY_SPECIFIED (decl)
3449 163998327 : = DECL_VISIBILITY_SPECIFIED (pattern);
3450 : }
3451 : }
3452 :
3453 363347662 : if (args
3454 : /* Template argument visibility outweighs #pragma or namespace
3455 : visibility, but not an explicit attribute. */
3456 363347662 : && !attr)
3457 : {
3458 363347641 : int depth = TMPL_ARGS_DEPTH (args);
3459 363347641 : if (DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P (TI_TEMPLATE (tinfo)))
3460 : /* Class template args don't affect template friends. */;
3461 360537500 : else if (DECL_VISIBILITY_SPECIFIED (decl))
3462 : {
3463 : /* A class template member with explicit visibility
3464 : overrides the class visibility, so we need to apply
3465 : all the levels of template args directly. */
3466 : int i;
3467 640973669 : for (i = 1; i <= depth; ++i)
3468 : {
3469 325362524 : tree lev = TMPL_ARGS_LEVEL (args, i);
3470 325362524 : constrain_visibility_for_template (decl, lev);
3471 : }
3472 : }
3473 44926355 : else if (PRIMARY_TEMPLATE_P (TI_TEMPLATE (tinfo)))
3474 : /* Limit visibility based on its template arguments. */
3475 30728383 : constrain_visibility_for_template (decl, args);
3476 : }
3477 : }
3478 : }
3479 :
3480 655307146 : if (class_type)
3481 333085517 : determine_visibility_from_class (decl, class_type);
3482 :
3483 655307146 : if (decl_internal_context_p (decl))
3484 : /* Names in an anonymous namespace get internal linkage. */
3485 301524 : constrain_visibility (decl, VISIBILITY_ANON, false);
3486 655005622 : else if (TREE_CODE (decl) != TYPE_DECL)
3487 : {
3488 : /* Propagate anonymity from type to decl. */
3489 473473232 : int tvis = type_visibility (TREE_TYPE (decl));
3490 473473232 : if (tvis == VISIBILITY_ANON
3491 473473232 : || ! DECL_VISIBILITY_SPECIFIED (decl))
3492 70418585 : constrain_visibility (decl, tvis, false);
3493 : }
3494 181532390 : else if (no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/true))
3495 : /* DR 757: A type without linkage shall not be used as the type of a
3496 : variable or function with linkage, unless
3497 : o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
3498 : o the variable or function is not used (3.2 [basic.def.odr]) or is
3499 : defined in the same translation unit.
3500 :
3501 : Since non-extern "C" decls need to be defined in the same
3502 : translation unit, we can make the type internal. */
3503 772793 : constrain_visibility (decl, VISIBILITY_ANON, false);
3504 :
3505 : /* If visibility changed and DECL already has DECL_RTL, ensure
3506 : symbol flags are updated. */
3507 655307146 : if ((DECL_VISIBILITY (decl) != orig_visibility
3508 654318939 : || DECL_VISIBILITY_SPECIFIED (decl) != orig_visibility_specified)
3509 345439056 : && ((VAR_P (decl) && TREE_STATIC (decl))
3510 320043221 : || TREE_CODE (decl) == FUNCTION_DECL)
3511 978125731 : && DECL_RTL_SET_P (decl))
3512 0 : make_decl_rtl (decl);
3513 : }
3514 :
3515 : /* By default, static data members and function members receive
3516 : the visibility of their containing class. */
3517 :
3518 : static void
3519 333134390 : determine_visibility_from_class (tree decl, tree class_type)
3520 : {
3521 333134390 : if (DECL_VISIBILITY_SPECIFIED (decl))
3522 : return;
3523 :
3524 166801364 : if (determine_hidden_inline (decl))
3525 145 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3526 : else
3527 : {
3528 : /* Default to the class visibility. */
3529 166801219 : DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
3530 333602438 : DECL_VISIBILITY_SPECIFIED (decl)
3531 166801219 : = CLASSTYPE_VISIBILITY_SPECIFIED (class_type);
3532 : }
3533 :
3534 : /* Give the target a chance to override the visibility associated
3535 : with DECL. */
3536 166801364 : if (VAR_P (decl)
3537 17035163 : && TREE_PUBLIC (decl)
3538 17035151 : && (DECL_TINFO_P (decl) || DECL_VTABLE_OR_VTT_P (decl))
3539 2291971 : && !DECL_REALLY_EXTERN (decl)
3540 169093335 : && !CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
3541 77063 : targetm.cxx.determine_class_data_visibility (decl);
3542 : }
3543 :
3544 : /* Returns true iff DECL is an inline that should get hidden visibility
3545 : because of -fvisibility-inlines-hidden. */
3546 :
3547 : static bool
3548 428411253 : determine_hidden_inline (tree decl)
3549 : {
3550 428411253 : return (visibility_options.inlines_hidden
3551 : /* Don't do this for inline templates; specializations might not be
3552 : inline, and we don't want them to inherit the hidden
3553 : visibility. We'll set it here for all inline instantiations. */
3554 410 : && !processing_template_decl
3555 386 : && TREE_CODE (decl) == FUNCTION_DECL
3556 297 : && DECL_DECLARED_INLINE_P (decl)
3557 428411464 : && (! DECL_LANG_SPECIFIC (decl)
3558 211 : || ! DECL_EXPLICIT_INSTANTIATION (decl)));
3559 : }
3560 :
3561 : /* Constrain the visibility of a class TYPE based on the visibility of its
3562 : field types. Warn if any fields require lesser visibility. */
3563 :
3564 : void
3565 52422083 : constrain_class_visibility (tree type)
3566 : {
3567 52422083 : tree binfo;
3568 52422083 : tree t;
3569 52422083 : int i;
3570 :
3571 52422083 : int vis = type_visibility (type);
3572 :
3573 52422083 : if (vis == VISIBILITY_ANON
3574 52422083 : || DECL_IN_SYSTEM_HEADER (TYPE_MAIN_DECL (type)))
3575 1359257 : return;
3576 :
3577 : /* Don't warn about visibility if the class has explicit visibility. */
3578 51062826 : if (CLASSTYPE_VISIBILITY_SPECIFIED (type))
3579 50207476 : vis = VISIBILITY_INTERNAL;
3580 :
3581 422867869 : for (t = TYPE_FIELDS (type); t; t = DECL_CHAIN (t))
3582 37979310 : if (TREE_CODE (t) == FIELD_DECL && TREE_TYPE (t) != error_mark_node
3583 409784193 : && !DECL_ARTIFICIAL (t))
3584 : {
3585 12984101 : tree ftype = strip_pointer_or_array_types (TREE_TYPE (t));
3586 12984101 : int subvis = type_visibility (ftype);
3587 :
3588 12984101 : if (subvis == VISIBILITY_ANON)
3589 : {
3590 114 : if (!in_main_input_context())
3591 : {
3592 27 : tree nlt = no_linkage_check (ftype, /*relaxed_p=*/false);
3593 27 : if (nlt)
3594 : {
3595 6 : if (same_type_p (TREE_TYPE (t), nlt))
3596 6 : warning (OPT_Wsubobject_linkage, "\
3597 : %qT has a field %q#D whose type has no linkage",
3598 : type, t);
3599 : else
3600 0 : warning (OPT_Wsubobject_linkage, "\
3601 : %qT has a field %qD whose type depends on the type %qT which has no linkage",
3602 : type, t, nlt);
3603 : }
3604 21 : else if (cxx_dialect > cxx98
3605 21 : && !decl_anon_ns_mem_p (ftype))
3606 2 : warning (OPT_Wsubobject_linkage, "\
3607 : %qT has a field %q#D whose type has internal linkage",
3608 : type, t);
3609 : else // In C++98 this can only happen with unnamed namespaces.
3610 19 : warning (OPT_Wsubobject_linkage, "\
3611 : %qT has a field %q#D whose type uses the anonymous namespace",
3612 : type, t);
3613 : }
3614 : }
3615 12983987 : else if (MAYBE_CLASS_TYPE_P (ftype)
3616 5007534 : && vis < VISIBILITY_HIDDEN
3617 5007534 : && subvis >= VISIBILITY_HIDDEN)
3618 6 : warning (OPT_Wattributes, "\
3619 : %qT declared with greater visibility than the type of its field %qD",
3620 : type, t);
3621 : }
3622 :
3623 51062826 : binfo = TYPE_BINFO (type);
3624 75735125 : for (i = 0; BINFO_BASE_ITERATE (binfo, i, t); ++i)
3625 : {
3626 24672299 : tree btype = BINFO_TYPE (t);
3627 24672299 : int subvis = type_visibility (btype);
3628 :
3629 24672299 : if (subvis == VISIBILITY_ANON)
3630 : {
3631 33 : if (!in_main_input_context())
3632 : {
3633 18 : tree nlt = no_linkage_check (btype, /*relaxed_p=*/false);
3634 18 : if (nlt)
3635 : {
3636 6 : if (same_type_p (btype, nlt))
3637 6 : warning (OPT_Wsubobject_linkage, "\
3638 : %qT has a base %qT which has no linkage",
3639 : type, btype);
3640 : else
3641 0 : warning (OPT_Wsubobject_linkage, "\
3642 : %qT has a base %qT which depends on the type %qT which has no linkage",
3643 : type, btype, nlt);
3644 : }
3645 12 : else if (cxx_dialect > cxx98
3646 12 : && !decl_anon_ns_mem_p (btype))
3647 3 : warning (OPT_Wsubobject_linkage, "\
3648 : %qT has a base %qT which has internal linkage",
3649 : type, btype);
3650 : else // In C++98 this can only happen with unnamed namespaces.
3651 9 : warning (OPT_Wsubobject_linkage, "\
3652 : %qT has a base %qT which uses the anonymous namespace",
3653 : type, btype);
3654 : }
3655 : }
3656 24672266 : else if (vis < VISIBILITY_HIDDEN
3657 24672266 : && subvis >= VISIBILITY_HIDDEN)
3658 6 : warning (OPT_Wattributes, "\
3659 : %qT declared with greater visibility than its base %qT",
3660 6 : type, TREE_TYPE (t));
3661 : }
3662 : }
3663 :
3664 : /* Functions for adjusting the visibility of a tagged type and its nested
3665 : types and declarations when it gets a name for linkage purposes from a
3666 : typedef. */
3667 : // FIXME: It is now a DR for such a class type to contain anything
3668 : // other than C. So at minimum most of this can probably be deleted.
3669 :
3670 : /* First reset the visibility of all the types. */
3671 :
3672 : static void
3673 1116435 : reset_type_linkage_1 (tree type)
3674 : {
3675 1116435 : set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
3676 1116435 : if (CLASS_TYPE_P (type))
3677 3732271 : for (tree member = TYPE_FIELDS (type); member; member = DECL_CHAIN (member))
3678 2966452 : if (DECL_IMPLICIT_TYPEDEF_P (member))
3679 238663 : reset_type_linkage_1 (TREE_TYPE (member));
3680 1116435 : }
3681 :
3682 : /* Then reset the visibility of any static data members or member
3683 : functions that use those types. */
3684 :
3685 : static void
3686 103 : reset_decl_linkage (tree decl)
3687 : {
3688 103 : if (TREE_PUBLIC (decl))
3689 : return;
3690 103 : if (DECL_CLONED_FUNCTION_P (decl))
3691 : return;
3692 99 : TREE_PUBLIC (decl) = true;
3693 99 : DECL_INTERFACE_KNOWN (decl) = false;
3694 99 : determine_visibility (decl);
3695 99 : tentative_decl_linkage (decl);
3696 : }
3697 :
3698 : void
3699 877772 : reset_type_linkage (tree type)
3700 : {
3701 877772 : reset_type_linkage_1 (type);
3702 877772 : if (CLASS_TYPE_P (type))
3703 : {
3704 527168 : if (tree vt = CLASSTYPE_VTABLES (type))
3705 : {
3706 15 : tree name = mangle_vtbl_for_type (type);
3707 15 : DECL_NAME (vt) = name;
3708 15 : SET_DECL_ASSEMBLER_NAME (vt, name);
3709 15 : reset_decl_linkage (vt);
3710 : }
3711 527168 : if (!ANON_AGGR_TYPE_P (type))
3712 527031 : if (tree ti = CLASSTYPE_TYPEINFO_VAR (type))
3713 : {
3714 12 : tree name = mangle_typeinfo_for_type (type);
3715 12 : DECL_NAME (ti) = name;
3716 12 : SET_DECL_ASSEMBLER_NAME (ti, name);
3717 12 : TREE_TYPE (name) = type;
3718 12 : reset_decl_linkage (ti);
3719 : }
3720 2476521 : for (tree m = TYPE_FIELDS (type); m; m = DECL_CHAIN (m))
3721 : {
3722 1949353 : tree mem = STRIP_TEMPLATE (m);
3723 1949353 : if (TREE_CODE (mem) == VAR_DECL || TREE_CODE (mem) == FUNCTION_DECL)
3724 76 : reset_decl_linkage (mem);
3725 1949277 : else if (DECL_IMPLICIT_TYPEDEF_P (mem))
3726 125667 : reset_type_linkage (TREE_TYPE (mem));
3727 : }
3728 : }
3729 877772 : }
3730 :
3731 : /* Set up our initial idea of what the linkage of DECL should be. */
3732 :
3733 : void
3734 31407304 : tentative_decl_linkage (tree decl)
3735 : {
3736 31407304 : if (DECL_INTERFACE_KNOWN (decl))
3737 : /* We've already made a decision as to how this function will
3738 : be handled. */;
3739 31406168 : else if (vague_linkage_p (decl))
3740 : {
3741 31405556 : if (TREE_CODE (decl) == FUNCTION_DECL
3742 31405556 : && decl_defined_p (decl))
3743 : {
3744 31382365 : DECL_EXTERNAL (decl) = 1;
3745 31382365 : DECL_NOT_REALLY_EXTERN (decl) = 1;
3746 31382365 : note_vague_linkage_fn (decl);
3747 : /* A non-template inline function with external linkage will
3748 : always be COMDAT. As we must eventually determine the
3749 : linkage of all functions, and as that causes writes to
3750 : the data mapped in from the PCH file, it's advantageous
3751 : to mark the functions at this point. */
3752 31382365 : if (DECL_DECLARED_INLINE_P (decl))
3753 : {
3754 31379825 : if (!DECL_IMPLICIT_INSTANTIATION (decl)
3755 31379825 : || DECL_DEFAULTED_FN (decl))
3756 : {
3757 : /* This function must have external linkage, as
3758 : otherwise DECL_INTERFACE_KNOWN would have been
3759 : set. */
3760 25869115 : gcc_assert (TREE_PUBLIC (decl));
3761 25869115 : comdat_linkage (decl);
3762 25869115 : DECL_INTERFACE_KNOWN (decl) = 1;
3763 : }
3764 5510710 : else if (DECL_MAYBE_IN_CHARGE_CDTOR_P (decl))
3765 : /* For implicit instantiations of cdtors try to make
3766 : it comdat, so that maybe_clone_body can use aliases.
3767 : See PR113208. */
3768 707131 : maybe_make_one_only (decl);
3769 : }
3770 : }
3771 23191 : else if (VAR_P (decl))
3772 23189 : maybe_commonize_var (decl);
3773 : }
3774 31407304 : }
3775 :
3776 : /* For a polymorphic class type CTYPE, whether its vtables are emitted in a
3777 : unique object as per the ABI. */
3778 :
3779 : static bool
3780 2851 : vtables_uniquely_emitted (tree ctype)
3781 : {
3782 : /* If the class is templated, the tables are emitted in every object that
3783 : references any of them. */
3784 2851 : if (CLASSTYPE_USE_TEMPLATE (ctype))
3785 : return false;
3786 :
3787 : /* Otherwise, if the class is attached to a module, the tables are uniquely
3788 : emitted in the object for the module unit in which it is defined. */
3789 2225 : tree cdecl = TYPE_NAME (ctype);
3790 2360 : if (DECL_LANG_SPECIFIC (cdecl) && DECL_MODULE_ATTACH_P (cdecl))
3791 : return true;
3792 :
3793 : /* Otherwise, if the class has a key function, the tables are emitted in the
3794 : object for the TU containing the definition of the key function. This is
3795 : unique if the key function is not inline. */
3796 2093 : tree key_method = CLASSTYPE_KEY_METHOD (ctype);
3797 4166 : if (key_method && !DECL_NONGNU_INLINE_P (key_method))
3798 2053 : return true;
3799 :
3800 : /* Otherwise, the tables are emitted in every object that references
3801 : any of them. */
3802 : return false;
3803 : }
3804 :
3805 : /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
3806 : for DECL has not already been determined, do so now by setting
3807 : DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
3808 : function is called entities with vague linkage whose definitions
3809 : are available must have TREE_PUBLIC set.
3810 :
3811 : If this function decides to place DECL in COMDAT, it will set
3812 : appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
3813 : the caller to decide whether or not to clear DECL_EXTERNAL. Some
3814 : callers defer that decision until it is clear that DECL is actually
3815 : required. */
3816 :
3817 : void
3818 237895546 : import_export_decl (tree decl)
3819 : {
3820 237895546 : bool comdat_p;
3821 237895546 : bool import_p;
3822 237895546 : tree class_type = NULL_TREE;
3823 :
3824 237895546 : if (DECL_INTERFACE_KNOWN (decl))
3825 : return;
3826 :
3827 : /* We cannot determine what linkage to give to an entity with vague
3828 : linkage until the end of the file. For example, a virtual table
3829 : for a class will be defined if and only if the key method is
3830 : defined in this translation unit. */
3831 41309589 : gcc_assert (at_eof);
3832 : /* Object file linkage for explicit instantiations is handled in
3833 : mark_decl_instantiated. For static variables in functions with
3834 : vague linkage, maybe_commonize_var is used.
3835 :
3836 : Therefore, the only declarations that should be provided to this
3837 : function are those with external linkage that are:
3838 :
3839 : * implicit instantiations of function templates
3840 :
3841 : * inline functions
3842 :
3843 : * inline variables
3844 :
3845 : * implicit instantiations of static data members of class
3846 : templates
3847 :
3848 : * virtual tables
3849 :
3850 : * typeinfo objects
3851 :
3852 : Furthermore, all entities that reach this point must have a
3853 : definition available in this translation unit.
3854 :
3855 : The following assertions check these conditions. */
3856 41309589 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
3857 : /* Any code that creates entities with TREE_PUBLIC cleared should
3858 : also set DECL_INTERFACE_KNOWN. */
3859 41309589 : gcc_assert (TREE_PUBLIC (decl));
3860 41309589 : if (TREE_CODE (decl) == FUNCTION_DECL)
3861 22224029 : gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
3862 : || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
3863 : || DECL_DECLARED_INLINE_P (decl));
3864 : else
3865 19085560 : gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
3866 : || DECL_INLINE_VAR_P (decl)
3867 : || DECL_VTABLE_OR_VTT_P (decl)
3868 : || DECL_TINFO_P (decl));
3869 : /* Check that a definition of DECL is available in this translation
3870 : unit. */
3871 41309589 : gcc_assert (!DECL_REALLY_EXTERN (decl));
3872 :
3873 : /* Assume that DECL will not have COMDAT linkage. */
3874 41309589 : comdat_p = false;
3875 : /* Assume that DECL will not be imported into this translation
3876 : unit. */
3877 41309589 : import_p = false;
3878 :
3879 41309589 : if (VAR_P (decl) && DECL_VTABLE_OR_VTT_P (decl))
3880 : {
3881 1656671 : class_type = DECL_CONTEXT (decl);
3882 1656671 : import_export_class (class_type);
3883 1656671 : if (CLASSTYPE_INTERFACE_KNOWN (class_type)
3884 1656671 : && CLASSTYPE_INTERFACE_ONLY (class_type))
3885 : import_p = true;
3886 532778 : else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
3887 532778 : && !vtables_uniquely_emitted (class_type))
3888 : /* The ABI historically required that all virtual tables be
3889 : emitted with COMDAT linkage. However, on systems where
3890 : COMDAT symbols don't show up in the table of contents for
3891 : a static archive, or on systems without weak symbols (where
3892 : we approximate COMDAT linkage by using internal linkage),
3893 : the linker will report errors about undefined symbols because
3894 : it will not see the virtual table definition. Therefore,
3895 : in the case that we know that the virtual table will be
3896 : emitted in only one translation unit, we make the virtual
3897 : table an ordinary definition with external linkage. */
3898 3 : DECL_EXTERNAL (decl) = 0;
3899 532775 : else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
3900 : {
3901 : /* CLASS_TYPE is being exported from this translation unit,
3902 : so DECL should be defined here. */
3903 2848 : if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
3904 : /* If a class is declared in a header with the "extern
3905 : template" extension, then it will not be instantiated,
3906 : even in translation units that would normally require
3907 : it. Often such classes are explicitly instantiated in
3908 : one translation unit. Therefore, the explicit
3909 : instantiation must be made visible to other translation
3910 : units. */
3911 0 : DECL_EXTERNAL (decl) = 0;
3912 : else
3913 : {
3914 : /* The generic C++ ABI used to say that class data is always
3915 : COMDAT, even if emitted in a unique object. This is no
3916 : longer true, but for now we continue to do so for
3917 : compatibility with programs that are not strictly valid.
3918 : However, some variants (e.g., the ARM EABI) explicitly say
3919 : that class data only has COMDAT linkage if the class data
3920 : might be emitted in more than one translation unit.
3921 : When the key method can be inline and is inline, we still
3922 : have to arrange for comdat even though
3923 : class_data_always_comdat is false. */
3924 2848 : if (!vtables_uniquely_emitted (class_type)
3925 2848 : || targetm.cxx.class_data_always_comdat ())
3926 : {
3927 : /* The ABI requires COMDAT linkage. Normally, we
3928 : only emit COMDAT things when they are needed;
3929 : make sure that we realize that this entity is
3930 : indeed needed. */
3931 2848 : comdat_p = true;
3932 2848 : mark_needed (decl);
3933 : }
3934 : }
3935 : }
3936 529927 : else if (!flag_implicit_templates
3937 529927 : && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
3938 : import_p = true;
3939 : else
3940 : comdat_p = true;
3941 : }
3942 39652918 : else if (VAR_P (decl) && DECL_TINFO_P (decl))
3943 : {
3944 2306403 : tree type = TREE_TYPE (DECL_NAME (decl));
3945 2306403 : if (CLASS_TYPE_P (type))
3946 : {
3947 2303688 : class_type = type;
3948 2303688 : import_export_class (type);
3949 2303688 : if (CLASSTYPE_INTERFACE_KNOWN (type)
3950 1275242 : && TYPE_CONTAINS_VPTR_P (type)
3951 1275152 : && CLASSTYPE_INTERFACE_ONLY (type)
3952 : /* If -fno-rtti was specified, then we cannot be sure
3953 : that RTTI information will be emitted with the
3954 : virtual table of the class, so we must emit it
3955 : wherever it is used. */
3956 3574926 : && flag_rtti)
3957 : import_p = true;
3958 : else
3959 : {
3960 1032496 : if (CLASSTYPE_INTERFACE_KNOWN (type)
3961 1032496 : && !CLASSTYPE_INTERFACE_ONLY (type))
3962 : {
3963 3944 : comdat_p = (targetm.cxx.class_data_always_comdat ()
3964 3944 : || !vtables_uniquely_emitted (class_type));
3965 3944 : mark_needed (decl);
3966 3944 : if (!flag_weak)
3967 : {
3968 0 : comdat_p = false;
3969 0 : DECL_EXTERNAL (decl) = 0;
3970 : }
3971 : }
3972 : else
3973 : comdat_p = true;
3974 : }
3975 : }
3976 : else
3977 : comdat_p = true;
3978 : }
3979 37346515 : else if (DECL_TEMPLOID_INSTANTIATION (decl))
3980 : {
3981 : /* DECL is an implicit instantiation of a function or static
3982 : data member. */
3983 37093560 : if (flag_implicit_templates
3984 37093560 : || (flag_implicit_inline_templates
3985 21112 : && TREE_CODE (decl) == FUNCTION_DECL
3986 16891 : && DECL_DECLARED_INLINE_P (decl)))
3987 : comdat_p = true;
3988 : else
3989 : /* If we are not implicitly generating templates, then mark
3990 : this entity as undefined in this translation unit. */
3991 : import_p = true;
3992 : }
3993 252955 : else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_FUNCTION_MEMBER_P (decl))
3994 : {
3995 243924 : if (!DECL_NONGNU_INLINE_P (decl))
3996 : {
3997 0 : tree ctype = DECL_CONTEXT (decl);
3998 0 : import_export_class (ctype);
3999 0 : if (CLASSTYPE_INTERFACE_KNOWN (ctype))
4000 : {
4001 0 : DECL_NOT_REALLY_EXTERN (decl)
4002 0 : = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
4003 0 : || (DECL_DECLARED_INLINE_P (decl)
4004 0 : && ! flag_implement_inlines
4005 0 : && !DECL_VINDEX (decl)));
4006 :
4007 0 : if (!DECL_NOT_REALLY_EXTERN (decl))
4008 0 : DECL_EXTERNAL (decl) = 1;
4009 :
4010 : /* Always make artificials weak. */
4011 0 : if (DECL_ARTIFICIAL (decl) && flag_weak)
4012 : comdat_p = true;
4013 : else
4014 0 : maybe_make_one_only (decl);
4015 : }
4016 : }
4017 : else
4018 : comdat_p = true;
4019 : }
4020 : else
4021 : comdat_p = true;
4022 :
4023 2851 : if (import_p)
4024 : {
4025 : /* If we are importing DECL into this translation unit, mark is
4026 : an undefined here. */
4027 2402685 : DECL_EXTERNAL (decl) = 1;
4028 2402685 : DECL_NOT_REALLY_EXTERN (decl) = 0;
4029 : }
4030 38906904 : else if (comdat_p)
4031 : {
4032 : /* If we decided to put DECL in COMDAT, mark it accordingly at
4033 : this point. */
4034 38906901 : comdat_linkage (decl);
4035 : }
4036 :
4037 41309589 : DECL_INTERFACE_KNOWN (decl) = 1;
4038 : }
4039 :
4040 : /* Return an expression that performs the destruction of DECL, which
4041 : must be a VAR_DECL whose type has a non-trivial destructor, or is
4042 : an array whose (innermost) elements have a non-trivial destructor. */
4043 :
4044 : tree
4045 1294 : build_cleanup (tree decl)
4046 : {
4047 1294 : tree clean = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
4048 1294 : gcc_assert (clean != NULL_TREE);
4049 1294 : return clean;
4050 : }
4051 :
4052 : /* GUARD is a helper variable for DECL; make them have the same linkage and
4053 : visibility. */
4054 :
4055 : void
4056 76798 : copy_linkage (tree guard, tree decl)
4057 : {
4058 76798 : TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
4059 76798 : TREE_STATIC (guard) = TREE_STATIC (decl);
4060 76798 : DECL_COMMON (guard) = DECL_COMMON (decl);
4061 76798 : DECL_COMDAT (guard) = DECL_COMDAT (decl);
4062 76798 : if (TREE_STATIC (guard))
4063 : {
4064 6324 : CP_DECL_THREAD_LOCAL_P (guard) = CP_DECL_THREAD_LOCAL_P (decl);
4065 6324 : set_decl_tls_model (guard, DECL_TLS_MODEL (decl));
4066 6324 : if (DECL_ONE_ONLY (decl))
4067 4367 : make_decl_one_only (guard, cxx_comdat_group (guard));
4068 6324 : if (TREE_PUBLIC (decl))
4069 5140 : DECL_WEAK (guard) = DECL_WEAK (decl);
4070 : /* Also check vague_linkage_p, as DECL_WEAK and DECL_ONE_ONLY might not
4071 : be set until import_export_decl at EOF. */
4072 6324 : if (vague_linkage_p (decl))
4073 4385 : comdat_linkage (guard);
4074 6324 : DECL_VISIBILITY (guard) = DECL_VISIBILITY (decl);
4075 6324 : DECL_VISIBILITY_SPECIFIED (guard) = DECL_VISIBILITY_SPECIFIED (decl);
4076 6324 : if (!TREE_PUBLIC (decl))
4077 : {
4078 1184 : gcc_checking_assert (DECL_INTERFACE_KNOWN (decl));
4079 1184 : DECL_INTERFACE_KNOWN (guard) = 1;
4080 1184 : if (DECL_LANG_SPECIFIC (decl) && DECL_LANG_SPECIFIC (guard))
4081 248 : DECL_NOT_REALLY_EXTERN (guard) = DECL_NOT_REALLY_EXTERN (decl);
4082 : }
4083 : }
4084 76798 : }
4085 :
4086 : /* Returns the initialization guard variable for the variable DECL,
4087 : which has static storage duration. */
4088 :
4089 : tree
4090 4733 : get_guard (tree decl)
4091 : {
4092 4733 : tree sname = mangle_guard_variable (decl);
4093 4733 : tree guard = get_global_binding (sname);
4094 4733 : if (! guard)
4095 : {
4096 4733 : tree guard_type;
4097 :
4098 : /* We use a type that is big enough to contain a mutex as well
4099 : as an integer counter. */
4100 4733 : guard_type = targetm.cxx.guard_type ();
4101 4733 : guard = build_decl (DECL_SOURCE_LOCATION (decl),
4102 : VAR_DECL, sname, guard_type);
4103 :
4104 : /* The guard should have the same linkage as what it guards. */
4105 4733 : copy_linkage (guard, decl);
4106 :
4107 4733 : DECL_ARTIFICIAL (guard) = 1;
4108 4733 : DECL_IGNORED_P (guard) = 1;
4109 4733 : TREE_USED (guard) = 1;
4110 4733 : pushdecl_top_level_and_finish (guard, NULL_TREE);
4111 : }
4112 4733 : return guard;
4113 : }
4114 :
4115 : /* Returns true if accessing the GUARD atomic is expensive,
4116 : i.e. involves a call to __sync_synchronize or similar.
4117 : In this case let __cxa_guard_acquire handle the atomics. */
4118 :
4119 : static bool
4120 3708 : is_atomic_expensive_p (machine_mode mode)
4121 : {
4122 3708 : if (!flag_inline_atomics)
4123 : return true;
4124 :
4125 3708 : if (!can_compare_and_swap_p (mode, false) || !can_atomic_load_p (mode))
4126 0 : return true;
4127 :
4128 : return false;
4129 : }
4130 :
4131 : /* Return an atomic load of src with the appropriate memory model. */
4132 :
4133 : static tree
4134 3708 : build_atomic_load_type (tree src, HOST_WIDE_INT model, tree type)
4135 : {
4136 3708 : tree ptr_type = build_pointer_type (type);
4137 3708 : tree mem_model = build_int_cst (integer_type_node, model);
4138 3708 : tree t, addr, val;
4139 3708 : unsigned int size;
4140 3708 : int fncode;
4141 :
4142 3708 : size = tree_to_uhwi (TYPE_SIZE_UNIT (type));
4143 :
4144 3708 : fncode = BUILT_IN_ATOMIC_LOAD_N + exact_log2 (size) + 1;
4145 3708 : t = builtin_decl_implicit ((enum built_in_function) fncode);
4146 :
4147 3708 : addr = build1 (ADDR_EXPR, ptr_type, src);
4148 3708 : val = build_call_expr (t, 2, addr, mem_model);
4149 3708 : return val;
4150 : }
4151 :
4152 : /* Return those bits of the GUARD variable that should be set when the
4153 : guarded entity is actually initialized. */
4154 :
4155 : static tree
4156 2050 : get_guard_bits (tree guard)
4157 : {
4158 2050 : if (!targetm.cxx.guard_mask_bit ())
4159 : {
4160 : /* We only set the first byte of the guard, in order to leave room
4161 : for a mutex in the high-order bits. */
4162 2050 : guard = build1 (ADDR_EXPR,
4163 2050 : build_pointer_type (TREE_TYPE (guard)),
4164 : guard);
4165 2050 : guard = build1 (NOP_EXPR,
4166 : build_pointer_type (char_type_node),
4167 : guard);
4168 2050 : guard = build1 (INDIRECT_REF, char_type_node, guard);
4169 : }
4170 :
4171 2050 : return guard;
4172 : }
4173 :
4174 : /* Return an expression which determines whether or not the GUARD
4175 : variable has already been initialized. */
4176 :
4177 : tree
4178 4733 : get_guard_cond (tree guard, bool thread_safe)
4179 : {
4180 4733 : tree guard_value;
4181 :
4182 4733 : if (!thread_safe)
4183 1025 : guard = get_guard_bits (guard);
4184 : else
4185 : {
4186 3708 : tree type = targetm.cxx.guard_mask_bit ()
4187 3708 : ? TREE_TYPE (guard) : char_type_node;
4188 :
4189 3708 : if (is_atomic_expensive_p (TYPE_MODE (type)))
4190 0 : guard = integer_zero_node;
4191 : else
4192 3708 : guard = build_atomic_load_type (guard, MEMMODEL_ACQUIRE, type);
4193 : }
4194 :
4195 : /* Mask off all but the low bit. */
4196 4733 : if (targetm.cxx.guard_mask_bit ())
4197 : {
4198 0 : guard_value = integer_one_node;
4199 0 : if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
4200 0 : guard_value = fold_convert (TREE_TYPE (guard), guard_value);
4201 0 : guard = cp_build_binary_op (input_location,
4202 : BIT_AND_EXPR, guard, guard_value,
4203 : tf_warning_or_error);
4204 : }
4205 :
4206 4733 : guard_value = integer_zero_node;
4207 4733 : if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
4208 4733 : guard_value = fold_convert (TREE_TYPE (guard), guard_value);
4209 4733 : return cp_build_binary_op (input_location,
4210 : EQ_EXPR, guard, guard_value,
4211 4733 : tf_warning_or_error);
4212 : }
4213 :
4214 : /* Return an expression which sets the GUARD variable, indicating that
4215 : the variable being guarded has been initialized. */
4216 :
4217 : tree
4218 1025 : set_guard (tree guard)
4219 : {
4220 1025 : tree guard_init;
4221 :
4222 : /* Set the GUARD to one. */
4223 1025 : guard = get_guard_bits (guard);
4224 1025 : guard_init = integer_one_node;
4225 1025 : if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
4226 1025 : guard_init = fold_convert (TREE_TYPE (guard), guard_init);
4227 1025 : return cp_build_modify_expr (input_location, guard, NOP_EXPR, guard_init,
4228 1025 : tf_warning_or_error);
4229 : }
4230 :
4231 : /* Returns true iff we can tell that VAR does not have a dynamic
4232 : initializer. */
4233 :
4234 : static bool
4235 2590 : var_defined_without_dynamic_init (tree var)
4236 : {
4237 : /* constinit vars are guaranteed to not have dynamic initializer,
4238 : but still registering the destructor counts as dynamic initialization. */
4239 2590 : if (DECL_DECLARED_CONSTINIT_P (var)
4240 24 : && COMPLETE_TYPE_P (TREE_TYPE (var))
4241 2608 : && !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (var)))
4242 : return true;
4243 : /* If it's defined in another TU, we can't tell. */
4244 2578 : if (DECL_EXTERNAL (var))
4245 : return false;
4246 : /* If it has a non-trivial destructor, registering the destructor
4247 : counts as dynamic initialization. */
4248 2331 : if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (var)))
4249 : return false;
4250 : /* If it's in this TU, its initializer has been processed, unless
4251 : it's a case of self-initialization, then DECL_INITIALIZED_P is
4252 : false while the initializer is handled by finish_id_expression. */
4253 2150 : if (!DECL_INITIALIZED_P (var))
4254 : return false;
4255 : /* If it has no initializer or a constant one, it's not dynamic. */
4256 2144 : return (!DECL_NONTRIVIALLY_INITIALIZED_P (var)
4257 2144 : || DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (var));
4258 : }
4259 :
4260 : /* Returns true iff VAR is a variable that needs uses to be
4261 : wrapped for possible dynamic initialization. */
4262 :
4263 : bool
4264 77547 : var_needs_tls_wrapper (tree var)
4265 : {
4266 77547 : return (!error_operand_p (var)
4267 77544 : && CP_DECL_THREAD_LOCAL_P (var)
4268 77544 : && !DECL_GNU_TLS_P (var)
4269 2728 : && !DECL_FUNCTION_SCOPE_P (var)
4270 80137 : && !var_defined_without_dynamic_init (var));
4271 : }
4272 :
4273 : /* Get the FUNCTION_DECL for the shared TLS init function for this
4274 : translation unit. */
4275 :
4276 : static tree
4277 195 : get_local_tls_init_fn (location_t loc)
4278 : {
4279 195 : tree sname = get_identifier ("__tls_init");
4280 195 : tree fn = get_global_binding (sname);
4281 195 : if (!fn)
4282 : {
4283 123 : fn = build_lang_decl_loc (loc, FUNCTION_DECL, sname,
4284 : build_function_type (void_type_node,
4285 : void_list_node));
4286 123 : SET_DECL_LANGUAGE (fn, lang_c);
4287 123 : TREE_PUBLIC (fn) = false;
4288 123 : DECL_ARTIFICIAL (fn) = true;
4289 123 : mark_used (fn);
4290 123 : set_global_binding (fn);
4291 : }
4292 195 : return fn;
4293 : }
4294 :
4295 : /* Get a FUNCTION_DECL for the init function for the thread_local
4296 : variable VAR. The init function will be an alias to the function
4297 : that initializes all the non-local TLS variables in the translation
4298 : unit. The init function is only used by the wrapper function. */
4299 :
4300 : static tree
4301 1282 : get_tls_init_fn (tree var)
4302 : {
4303 : /* Only C++11 TLS vars need this init fn. */
4304 1282 : if (!var_needs_tls_wrapper (var))
4305 : return NULL_TREE;
4306 :
4307 : /* If -fno-extern-tls-init, assume that we don't need to call
4308 : a tls init function for a variable defined in another TU. */
4309 1263 : if (!flag_extern_tls_init && DECL_EXTERNAL (var))
4310 : return NULL_TREE;
4311 :
4312 : /* If the variable is internal, or if we can't generate aliases,
4313 : call the local init function directly. */
4314 1262 : if (!TREE_PUBLIC (var) || !TARGET_SUPPORTS_ALIASES)
4315 72 : return get_local_tls_init_fn (DECL_SOURCE_LOCATION (var));
4316 :
4317 1190 : tree sname = mangle_tls_init_fn (var);
4318 1190 : tree fn = get_global_binding (sname);
4319 1190 : if (!fn)
4320 : {
4321 765 : fn = build_lang_decl (FUNCTION_DECL, sname,
4322 : build_function_type (void_type_node,
4323 : void_list_node));
4324 765 : SET_DECL_LANGUAGE (fn, lang_c);
4325 765 : TREE_PUBLIC (fn) = TREE_PUBLIC (var);
4326 765 : DECL_ARTIFICIAL (fn) = true;
4327 765 : DECL_CONTEXT (fn) = FROB_CONTEXT (global_namespace);
4328 765 : DECL_COMDAT (fn) = DECL_COMDAT (var);
4329 765 : DECL_EXTERNAL (fn) = DECL_EXTERNAL (var);
4330 765 : if (DECL_ONE_ONLY (var))
4331 3 : make_decl_one_only (fn, cxx_comdat_group (fn));
4332 765 : if (TREE_PUBLIC (var))
4333 : {
4334 765 : tree obtype = strip_array_types (non_reference (TREE_TYPE (var)));
4335 : /* If the variable is defined somewhere else and might have static
4336 : initialization, make the init function a weak reference. */
4337 765 : if ((!TYPE_NEEDS_CONSTRUCTING (obtype)
4338 603 : || TYPE_HAS_CONSTEXPR_CTOR (obtype)
4339 585 : || TYPE_HAS_TRIVIAL_DFLT (obtype))
4340 180 : && TYPE_HAS_TRIVIAL_DESTRUCTOR (obtype)
4341 927 : && DECL_EXTERNAL (var))
4342 51 : declare_weak (fn);
4343 : else
4344 714 : DECL_WEAK (fn) = DECL_WEAK (var);
4345 : }
4346 765 : DECL_VISIBILITY (fn) = DECL_VISIBILITY (var);
4347 765 : DECL_VISIBILITY_SPECIFIED (fn) = DECL_VISIBILITY_SPECIFIED (var);
4348 765 : DECL_DLLIMPORT_P (fn) = DECL_DLLIMPORT_P (var);
4349 765 : DECL_IGNORED_P (fn) = 1;
4350 765 : mark_used (fn);
4351 :
4352 765 : DECL_BEFRIENDING_CLASSES (fn) = var;
4353 :
4354 765 : set_global_binding (fn);
4355 : }
4356 : return fn;
4357 : }
4358 :
4359 : /* Get a FUNCTION_DECL for the init wrapper function for the thread_local
4360 : variable VAR. The wrapper function calls the init function (if any) for
4361 : VAR and then returns a reference to VAR. The wrapper function is used
4362 : in place of VAR everywhere VAR is mentioned. */
4363 :
4364 : static tree
4365 76250 : get_tls_wrapper_fn (tree var)
4366 : {
4367 : /* Only C++11 TLS vars need this wrapper fn. */
4368 76250 : if (!var_needs_tls_wrapper (var))
4369 : return NULL_TREE;
4370 :
4371 749 : tree sname = mangle_tls_wrapper_fn (var);
4372 749 : tree fn = get_global_binding (sname);
4373 749 : if (!fn)
4374 : {
4375 : /* A named rvalue reference is an lvalue, so the wrapper should
4376 : always return an lvalue reference. */
4377 586 : tree type = non_reference (TREE_TYPE (var));
4378 586 : type = build_reference_type (type);
4379 586 : tree fntype = build_function_type (type, void_list_node);
4380 :
4381 586 : fn = build_lang_decl_loc (DECL_SOURCE_LOCATION (var),
4382 : FUNCTION_DECL, sname, fntype);
4383 586 : SET_DECL_LANGUAGE (fn, lang_c);
4384 586 : TREE_PUBLIC (fn) = TREE_PUBLIC (var);
4385 586 : DECL_ARTIFICIAL (fn) = true;
4386 586 : DECL_IGNORED_P (fn) = 1;
4387 586 : DECL_CONTEXT (fn) = FROB_CONTEXT (global_namespace);
4388 : /* The wrapper is inline and emitted everywhere var is used. */
4389 586 : DECL_DECLARED_INLINE_P (fn) = true;
4390 586 : if (TREE_PUBLIC (var))
4391 : {
4392 514 : comdat_linkage (fn);
4393 : #ifdef HAVE_GAS_HIDDEN
4394 : /* Make the wrapper bind locally; there's no reason to share
4395 : the wrapper between multiple shared objects. */
4396 514 : DECL_VISIBILITY (fn) = VISIBILITY_INTERNAL;
4397 514 : DECL_VISIBILITY_SPECIFIED (fn) = true;
4398 : #endif
4399 : }
4400 586 : if (!TREE_PUBLIC (fn))
4401 72 : DECL_INTERFACE_KNOWN (fn) = true;
4402 586 : mark_used (fn);
4403 586 : note_vague_linkage_fn (fn);
4404 :
4405 : #if 0
4406 : /* We want CSE to commonize calls to the wrapper, but marking it as
4407 : pure is unsafe since it has side-effects. I guess we need a new
4408 : ECF flag even weaker than ECF_PURE. FIXME! */
4409 : DECL_PURE_P (fn) = true;
4410 : #endif
4411 :
4412 586 : DECL_BEFRIENDING_CLASSES (fn) = var;
4413 :
4414 586 : set_global_binding (fn);
4415 : }
4416 : return fn;
4417 : }
4418 :
4419 : /* If EXPR is a thread_local variable that should be wrapped by init
4420 : wrapper function, return a call to that function, otherwise return
4421 : NULL. */
4422 :
4423 : tree
4424 994064983 : maybe_get_tls_wrapper_call (tree expr)
4425 : {
4426 994064983 : if (VAR_P (expr)
4427 341223744 : && !processing_template_decl
4428 142914040 : && !cp_unevaluated_operand
4429 1135155486 : && CP_DECL_THREAD_LOCAL_P (expr))
4430 76250 : if (tree wrap = get_tls_wrapper_fn (expr))
4431 749 : return build_cxx_call (wrap, 0, NULL, tf_warning_or_error);
4432 : return NULL;
4433 : }
4434 :
4435 : /* At EOF, generate the definition for the TLS wrapper function FN:
4436 :
4437 : T& var_wrapper() {
4438 : if (init_fn) init_fn();
4439 : return var;
4440 : } */
4441 :
4442 : static void
4443 586 : generate_tls_wrapper (tree fn)
4444 : {
4445 586 : tree var = DECL_BEFRIENDING_CLASSES (fn);
4446 :
4447 586 : start_preparsed_function (fn, NULL_TREE, SF_DEFAULT | SF_PRE_PARSED);
4448 586 : tree body = begin_function_body ();
4449 : /* Only call the init fn if there might be one. */
4450 586 : if (tree init_fn = get_tls_init_fn (var))
4451 : {
4452 566 : tree if_stmt = NULL_TREE;
4453 : /* If init_fn is a weakref, make sure it exists before calling. */
4454 566 : if (lookup_attribute ("weak", DECL_ATTRIBUTES (init_fn)))
4455 : {
4456 51 : if_stmt = begin_if_stmt ();
4457 51 : tree addr = cp_build_addr_expr (init_fn, tf_warning_or_error);
4458 51 : tree cond = cp_build_binary_op (DECL_SOURCE_LOCATION (var),
4459 : NE_EXPR, addr, nullptr_node,
4460 : tf_warning_or_error);
4461 51 : finish_if_stmt_cond (cond, if_stmt);
4462 : }
4463 566 : finish_expr_stmt (build_cxx_call
4464 : (init_fn, 0, NULL, tf_warning_or_error));
4465 566 : if (if_stmt)
4466 : {
4467 51 : finish_then_clause (if_stmt);
4468 51 : finish_if_stmt (if_stmt);
4469 : }
4470 : }
4471 : else
4472 : /* If there's no initialization, the wrapper is a constant function. */
4473 20 : TREE_READONLY (fn) = true;
4474 586 : finish_return_stmt (convert_from_reference (var));
4475 586 : finish_function_body (body);
4476 586 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
4477 586 : }
4478 :
4479 : /* Start a global constructor or destructor function. */
4480 :
4481 : static tree
4482 7591 : start_objects (bool initp, unsigned priority, bool has_body,
4483 : bool omp_target = false)
4484 : {
4485 7591 : bool default_init = initp && priority == DEFAULT_INIT_PRIORITY;
4486 : /* FIXME: We may eventually want to treat OpenMP offload initializers
4487 : in modules specially as well. */
4488 7591 : bool is_module_init = (default_init
4489 7591 : && !omp_target
4490 7591 : && module_global_init_needed ());
4491 7591 : tree name = NULL_TREE;
4492 :
4493 7591 : if (is_module_init)
4494 2007 : name = mangle_module_global_init (0);
4495 : else
4496 : {
4497 5584 : char type[14];
4498 :
4499 : /* We use `I' to indicate initialization and `D' to indicate
4500 : destruction. */
4501 5584 : unsigned len;
4502 5584 : if (omp_target)
4503 : /* Use "off_" signifying "offload" here. The name must be distinct
4504 : from the non-offload case. The format of the name is scanned in
4505 : tree.cc/get_file_function_name, so stick to the same length for
4506 : both name variants. */
4507 15 : len = sprintf (type, "off_%c", initp ? 'I' : 'D');
4508 : else
4509 5578 : len = sprintf (type, "sub_%c", initp ? 'I' : 'D');
4510 5584 : if (priority != DEFAULT_INIT_PRIORITY)
4511 : {
4512 40 : char joiner = '_';
4513 : #ifdef JOINER
4514 40 : joiner = JOINER;
4515 : #endif
4516 40 : type[len++] = joiner;
4517 40 : sprintf (type + len, "%.5u", priority);
4518 : }
4519 5584 : name = get_file_function_name (type);
4520 : }
4521 :
4522 7591 : tree fntype = build_function_type (void_type_node, void_list_node);
4523 7591 : tree fndecl = build_lang_decl (FUNCTION_DECL, name, fntype);
4524 :
4525 7591 : if (omp_target)
4526 : {
4527 15 : DECL_ATTRIBUTES (fndecl)
4528 15 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
4529 15 : DECL_ATTRIBUTES (fndecl));
4530 15 : DECL_ATTRIBUTES (fndecl)
4531 30 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
4532 15 : DECL_ATTRIBUTES (fndecl));
4533 : }
4534 :
4535 7591 : DECL_CONTEXT (fndecl) = FROB_CONTEXT (global_namespace);
4536 7591 : if (is_module_init)
4537 : {
4538 2007 : SET_DECL_ASSEMBLER_NAME (fndecl, name);
4539 2007 : TREE_PUBLIC (fndecl) = true;
4540 2007 : determine_visibility (fndecl);
4541 : }
4542 : else
4543 5584 : TREE_PUBLIC (fndecl) = 0;
4544 7591 : start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
4545 :
4546 : /* Mark as artificial because it's not explicitly in the user's
4547 : source code. */
4548 7591 : DECL_ARTIFICIAL (current_function_decl) = 1;
4549 :
4550 : /* Mark this declaration as used to avoid spurious warnings. */
4551 7591 : TREE_USED (current_function_decl) = 1;
4552 :
4553 : /* Mark this function as a global constructor or destructor. */
4554 7591 : if (initp)
4555 7582 : DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
4556 : else
4557 9 : DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
4558 :
4559 7591 : tree body = begin_compound_stmt (BCS_FN_BODY);
4560 :
4561 7591 : if (is_module_init && has_body)
4562 : {
4563 : // If the function is going to be empty, don't emit idempotency.
4564 : // 'static bool __in_chrg = false;
4565 : // if (__inchrg) return;
4566 : // __inchrg = true
4567 73 : tree var = build_lang_decl (VAR_DECL, in_charge_identifier,
4568 : boolean_type_node);
4569 73 : DECL_CONTEXT (var) = fndecl;
4570 73 : DECL_ARTIFICIAL (var) = true;
4571 73 : TREE_STATIC (var) = true;
4572 73 : pushdecl (var);
4573 73 : cp_finish_decl (var, NULL_TREE, false, NULL_TREE, 0);
4574 :
4575 73 : tree if_stmt = begin_if_stmt ();
4576 73 : finish_if_stmt_cond (var, if_stmt);
4577 73 : finish_return_stmt (NULL_TREE);
4578 73 : finish_then_clause (if_stmt);
4579 73 : finish_if_stmt (if_stmt);
4580 :
4581 73 : tree assign = build2 (MODIFY_EXPR, boolean_type_node,
4582 : var, boolean_true_node);
4583 73 : TREE_SIDE_EFFECTS (assign) = true;
4584 73 : finish_expr_stmt (assign);
4585 : }
4586 :
4587 7591 : return body;
4588 : }
4589 :
4590 : /* Finish a global constructor or destructor. Add it to the global
4591 : ctors or dtors, if STARTP is true. */
4592 :
4593 : static tree
4594 7588 : finish_objects (bool initp, unsigned priority, tree body, bool startp)
4595 : {
4596 : /* Finish up. */
4597 7588 : finish_compound_stmt (body);
4598 7588 : tree fn = finish_function (/*inline_p=*/false);
4599 :
4600 7588 : if (!startp)
4601 : ; // Neither ctor nor dtor I be.
4602 5654 : else if (initp)
4603 : {
4604 5645 : DECL_STATIC_CONSTRUCTOR (fn) = 1;
4605 5645 : decl_init_priority_insert (fn, priority);
4606 : }
4607 : else
4608 : {
4609 9 : DECL_STATIC_DESTRUCTOR (fn) = 1;
4610 9 : decl_fini_priority_insert (fn, priority);
4611 : }
4612 :
4613 7588 : return fn;
4614 : }
4615 :
4616 : /* The name of the function we create to handle initializations and
4617 : destructions for objects with static storage duration. */
4618 : #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
4619 : #define OMP_SSDF_IDENTIFIER "__omp_target_static_init_and_destruction"
4620 :
4621 : /* Begins the generation of the function that will handle all
4622 : initialization or destruction of objects with static storage
4623 : duration at PRIORITY.
4624 :
4625 : It is assumed that this function will be called once for the host, and once
4626 : for an OpenMP offload target. */
4627 :
4628 : static tree
4629 5663 : start_partial_init_fini_fn (bool initp, unsigned priority, unsigned count,
4630 : bool omp_target)
4631 : {
4632 5663 : char id[MAX (sizeof (SSDF_IDENTIFIER), sizeof (OMP_SSDF_IDENTIFIER))
4633 : + 1 /* \0 */ + 32];
4634 5663 : tree name;
4635 :
4636 : /* Create the identifier for this function. It will be of the form
4637 : SSDF_IDENTIFIER_<number> if not omp_target and otherwise
4638 : OMP_SSDF_IDENTIFIER_<number>. */
4639 5663 : sprintf (id, "%s_%u", omp_target ? OMP_SSDF_IDENTIFIER : SSDF_IDENTIFIER,
4640 : count);
4641 5663 : name = get_identifier (id);
4642 5663 : tree type = build_function_type (void_type_node, void_list_node);
4643 :
4644 : /* Create the FUNCTION_DECL itself. */
4645 5663 : tree fn = build_lang_decl (FUNCTION_DECL, name, type);
4646 5663 : TREE_PUBLIC (fn) = 0;
4647 5663 : DECL_ARTIFICIAL (fn) = 1;
4648 :
4649 5663 : if (omp_target)
4650 : {
4651 15 : DECL_ATTRIBUTES (fn)
4652 15 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
4653 15 : DECL_ATTRIBUTES (fn));
4654 15 : DECL_ATTRIBUTES (fn)
4655 30 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
4656 15 : DECL_ATTRIBUTES (fn));
4657 : }
4658 :
4659 5663 : int idx = initp + 2 * omp_target;
4660 :
4661 : /* Put this function in the list of functions to be called from the
4662 : static constructors and destructors. */
4663 5663 : if (!static_init_fini_fns[idx])
4664 5633 : static_init_fini_fns[idx] = priority_map_t::create_ggc ();
4665 5663 : auto &slot = static_init_fini_fns[idx]->get_or_insert (priority);
4666 5663 : slot = tree_cons (fn, NULL_TREE, slot);
4667 :
4668 : /* Put the function in the global scope. */
4669 5663 : pushdecl (fn);
4670 :
4671 : /* Start the function itself. This is equivalent to declaring the
4672 : function as:
4673 :
4674 : static void __ssdf (int __initialize_p, init __priority_p);
4675 :
4676 : It is static because we only need to call this function from the
4677 : various constructor and destructor functions for this module. */
4678 5663 : start_preparsed_function (fn, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
4679 :
4680 : /* Set up the scope of the outermost block in the function. */
4681 5663 : return begin_compound_stmt (BCS_FN_BODY);
4682 : }
4683 :
4684 : /* Finish the generation of the function which performs initialization
4685 : or destruction of objects with static storage duration. */
4686 :
4687 : static void
4688 5663 : finish_partial_init_fini_fn (tree body)
4689 : {
4690 : /* Close out the function. */
4691 5663 : finish_compound_stmt (body);
4692 5663 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
4693 5663 : }
4694 :
4695 : /* The effective initialization priority of a DECL. */
4696 :
4697 : #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
4698 : ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
4699 : ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
4700 :
4701 : /* Whether a DECL needs a guard to protect it against multiple
4702 : initialization. */
4703 :
4704 : #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
4705 : || DECL_ONE_ONLY (decl) \
4706 : || DECL_WEAK (decl)))
4707 :
4708 : /* Walks the initializer list of a global variable and looks for
4709 : temporary variables (DECL_NAME() == NULL and DECL_ARTIFICIAL != 0)
4710 : and that have their DECL_CONTEXT() == NULL. For each such
4711 : temporary variable, set their DECL_CONTEXT() to CTX -- the
4712 : initializing function. This is necessary because otherwise some
4713 : optimizers (enabled by -O2 -fprofile-arcs) might crash when trying
4714 : to refer to a temporary variable that does not have its
4715 : DECL_CONTEXT() properly set. */
4716 :
4717 : static tree
4718 193063 : fix_temporary_vars_context_r (tree *node,
4719 : int * /*unused*/,
4720 : void *ctx)
4721 : {
4722 193063 : if (TREE_CODE (*node) == BIND_EXPR)
4723 440 : for (tree var = BIND_EXPR_VARS (*node); var; var = DECL_CHAIN (var))
4724 220 : if (VAR_P (var) && !DECL_NAME (var)
4725 440 : && DECL_ARTIFICIAL (var) && !DECL_CONTEXT (var))
4726 220 : DECL_CONTEXT (var) = tree (ctx);
4727 :
4728 193063 : return NULL_TREE;
4729 : }
4730 :
4731 : /* Set up to handle the initialization or destruction of DECL. If
4732 : INITP is nonzero, we are initializing the variable. Otherwise, we
4733 : are destroying it. */
4734 :
4735 : static void
4736 11267 : one_static_initialization_or_destruction (bool initp, tree decl, tree init,
4737 : bool omp_target)
4738 : {
4739 : /* If we are supposed to destruct and there's a trivial destructor,
4740 : nothing has to be done. */
4741 11267 : gcc_checking_assert (init || !TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)));
4742 :
4743 : /* Trick the compiler into thinking we are at the file and line
4744 : where DECL was declared so that error-messages make sense, and so
4745 : that the debugger will show somewhat sensible file and line
4746 : information. */
4747 11267 : input_location = DECL_SOURCE_LOCATION (decl);
4748 :
4749 : /* Make sure temporary variables in the initialiser all have
4750 : their DECL_CONTEXT() set to a value different from NULL_TREE.
4751 : This can happen when global variables initializers are built.
4752 : In that case, the DECL_CONTEXT() of the global variables _AND_ of all
4753 : the temporary variables that might have been generated in the
4754 : accompanying initializers is NULL_TREE, meaning the variables have been
4755 : declared in the global namespace.
4756 : What we want to do here is to fix that and make sure the DECL_CONTEXT()
4757 : of the temporaries are set to the current function decl. */
4758 11267 : cp_walk_tree_without_duplicates (&init,
4759 : fix_temporary_vars_context_r,
4760 : current_function_decl);
4761 :
4762 : /* Because of:
4763 :
4764 : [class.access.spec]
4765 :
4766 : Access control for implicit calls to the constructors,
4767 : the conversion functions, or the destructor called to
4768 : create and destroy a static data member is performed as
4769 : if these calls appeared in the scope of the member's
4770 : class.
4771 :
4772 : we pretend we are in a static member function of the class of
4773 : which the DECL is a member. */
4774 11267 : if (member_p (decl))
4775 : {
4776 1538 : DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
4777 1538 : DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
4778 : }
4779 :
4780 : /* Assume we don't need a guard. */
4781 11267 : tree guard_if_stmt = NULL_TREE;
4782 :
4783 : /* We need a guard if this is an object with external linkage that
4784 : might be initialized in more than one place. (For example, a
4785 : static data member of a template, when the data member requires
4786 : construction.) */
4787 11267 : if (NEEDS_GUARD_P (decl))
4788 : {
4789 877 : tree guard = get_guard (decl);
4790 877 : tree guard_cond;
4791 :
4792 877 : if (flag_use_cxa_atexit)
4793 : {
4794 : /* When using __cxa_atexit, we just check the GUARD as we
4795 : would for a local static. We never try to destroy
4796 : anything from a static destructor. */
4797 877 : gcc_assert (initp);
4798 877 : guard_cond = get_guard_cond (guard, false);
4799 : }
4800 : else
4801 : {
4802 : /* If we don't have __cxa_atexit, then we will be running
4803 : destructors from .fini sections, or their equivalents.
4804 : So, we need to know how many times we've tried to
4805 : initialize this object. We do initializations only if
4806 : the GUARD was or becomes zero (initp vs !initp
4807 : respectively). */
4808 0 : guard_cond = cp_build_unary_op (initp ? POSTINCREMENT_EXPR
4809 : : PREDECREMENT_EXPR,
4810 : guard,
4811 : /*noconvert=*/true,
4812 : tf_warning_or_error);
4813 0 : guard_cond = cp_build_binary_op (input_location, EQ_EXPR, guard_cond,
4814 : integer_zero_node,
4815 : tf_warning_or_error);
4816 : }
4817 :
4818 877 : guard_if_stmt = begin_if_stmt ();
4819 877 : finish_if_stmt_cond (guard_cond, guard_if_stmt);
4820 :
4821 877 : if (flag_use_cxa_atexit)
4822 : /* Set the GUARD now. */
4823 877 : finish_expr_stmt (set_guard (guard));
4824 : }
4825 :
4826 : /* Perform the initialization or destruction. */
4827 11267 : if (initp)
4828 : {
4829 11252 : if (init)
4830 : {
4831 10531 : finish_expr_stmt (init);
4832 10531 : if (sanitize_flags_p (SANITIZE_ADDRESS, decl))
4833 28 : if (varpool_node *vnode = varpool_node::get (decl))
4834 28 : vnode->dynamically_initialized = 1;
4835 : }
4836 :
4837 : /* If we're using __cxa_atexit, register a function that calls the
4838 : destructor for the object. */
4839 11252 : if (flag_use_cxa_atexit)
4840 11243 : finish_expr_stmt (register_dtor_fn (decl, omp_target));
4841 : }
4842 : else
4843 15 : finish_expr_stmt (build_cleanup (decl));
4844 :
4845 : /* Finish the guard if-stmt, if necessary. */
4846 11267 : if (guard_if_stmt)
4847 : {
4848 877 : finish_then_clause (guard_if_stmt);
4849 877 : finish_if_stmt (guard_if_stmt);
4850 : }
4851 :
4852 : /* Now that we're done with DECL we don't need to pretend to be a
4853 : member of its class any longer. */
4854 11267 : DECL_CONTEXT (current_function_decl) = NULL_TREE;
4855 11267 : DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
4856 11267 : }
4857 :
4858 : /* Helper function for emit_partial_init_fini_fn and handle_tls_init.
4859 : For structured bindings, disable stmts_are_full_exprs_p ()
4860 : on STATIC_INIT_DECOMP_BASE_P nodes, re-enable it on the
4861 : first STATIC_INIT_DECOMP_NONBASE_P node and emit all the
4862 : STATIC_INIT_DECOMP_BASE_P and STATIC_INIT_DECOMP_NONBASE_P
4863 : consecutive nodes in a single STATEMENT_LIST wrapped with
4864 : CLEANUP_POINT_EXPR. */
4865 :
4866 : static inline tree
4867 11267 : decomp_handle_one_var (tree node, tree sl, bool *saw_nonbase,
4868 : int save_stmts_are_full_exprs_p)
4869 : {
4870 11336 : if (sl && !*saw_nonbase && STATIC_INIT_DECOMP_NONBASE_P (node))
4871 : {
4872 63 : *saw_nonbase = true;
4873 63 : current_stmt_tree ()->stmts_are_full_exprs_p
4874 63 : = save_stmts_are_full_exprs_p;
4875 : }
4876 11390 : else if (sl && *saw_nonbase && !STATIC_INIT_DECOMP_NONBASE_P (node))
4877 : {
4878 45 : sl = pop_stmt_list (sl);
4879 45 : sl = maybe_cleanup_point_expr_void (sl);
4880 45 : add_stmt (sl);
4881 45 : sl = NULL_TREE;
4882 : }
4883 22324 : if (sl == NULL_TREE && STATIC_INIT_DECOMP_BASE_P (node))
4884 : {
4885 63 : sl = push_stmt_list ();
4886 63 : *saw_nonbase = false;
4887 63 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
4888 : }
4889 11267 : return sl;
4890 : }
4891 :
4892 : /* Similarly helper called when the whole var list is processed. */
4893 :
4894 : static inline void
4895 5731 : decomp_finalize_var_list (tree sl, int save_stmts_are_full_exprs_p)
4896 : {
4897 5731 : if (sl)
4898 : {
4899 18 : current_stmt_tree ()->stmts_are_full_exprs_p
4900 18 : = save_stmts_are_full_exprs_p;
4901 18 : sl = pop_stmt_list (sl);
4902 18 : sl = maybe_cleanup_point_expr_void (sl);
4903 18 : add_stmt (sl);
4904 : }
4905 5731 : }
4906 :
4907 : /* Helper for emit_partial_init_fini_fn OpenMP target handling, called via
4908 : walk_tree. Set DECL_CONTEXT on any automatic temporaries which still
4909 : have it NULL to id->src_fn, so that later copy_tree_body_r can remap those.
4910 : Otherwise DECL_CONTEXT would be set only during gimplification of the host
4911 : fn and when copy_tree_body_r doesn't remap those, we'd ICE during the
4912 : target fn gimplification because the same automatic VAR_DECL can't be
4913 : used in multiple functions (with the exception of nested functions). */
4914 :
4915 : static tree
4916 303 : set_context_for_auto_vars_r (tree *tp, int *, void *data)
4917 : {
4918 303 : copy_body_data *id = (copy_body_data *) data;
4919 303 : if (auto_var_in_fn_p (*tp, NULL_TREE) && DECL_ARTIFICIAL (*tp))
4920 11 : DECL_CONTEXT (*tp) = id->src_fn;
4921 303 : return NULL_TREE;
4922 : }
4923 :
4924 : /* Generate code to do the initialization or destruction of the decls in VARS,
4925 : a TREE_LIST of VAR_DECL with static storage duration.
4926 : Whether initialization or destruction is performed is specified by INITP. */
4927 :
4928 : static tree
4929 5608 : emit_partial_init_fini_fn (bool initp, unsigned priority, tree vars,
4930 : unsigned counter, location_t locus, tree host_fn)
4931 : {
4932 5608 : input_location = locus;
4933 5608 : bool omp_target = (host_fn != NULL_TREE);
4934 5608 : tree body = start_partial_init_fini_fn (initp, priority, counter, omp_target);
4935 5608 : tree fndecl = current_function_decl;
4936 :
4937 5608 : tree nonhost_if_stmt = NULL_TREE;
4938 5608 : if (omp_target)
4939 : {
4940 15 : nonhost_if_stmt = begin_if_stmt ();
4941 : /* We add an "omp declare target nohost" attribute, but (for
4942 : now) we still get a copy of the constructor/destructor on
4943 : the host. Make sure it does nothing unless we're on the
4944 : target device. */
4945 15 : tree fn = builtin_decl_explicit (BUILT_IN_OMP_IS_INITIAL_DEVICE);
4946 15 : tree initial_dev = build_call_expr (fn, 0);
4947 15 : tree target_dev_p
4948 15 : = cp_build_binary_op (input_location, NE_EXPR, initial_dev,
4949 : integer_one_node, tf_warning_or_error);
4950 15 : finish_if_stmt_cond (target_dev_p, nonhost_if_stmt);
4951 : }
4952 :
4953 5608 : tree sl = NULL_TREE;
4954 5608 : int save_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4955 5608 : bool saw_nonbase = false;
4956 16080 : for (tree node = vars; node; node = TREE_CHAIN (node))
4957 : {
4958 10472 : tree decl = TREE_VALUE (node);
4959 10472 : tree init = TREE_PURPOSE (node);
4960 10472 : sl = decomp_handle_one_var (node, sl, &saw_nonbase,
4961 : save_stmts_are_full_exprs_p);
4962 : /* We will emit 'init' twice, and it is modified in-place during
4963 : gimplification. Make a copy here. */
4964 10472 : if (omp_target)
4965 : {
4966 : /* We've already emitted INIT in the host version of the ctor/dtor
4967 : function. We need to deep-copy it (including new versions of
4968 : local variables introduced, etc.) for use in the target
4969 : ctor/dtor function. */
4970 19 : copy_body_data id;
4971 19 : hash_map<tree, tree> decl_map;
4972 19 : memset (&id, 0, sizeof (id));
4973 19 : id.src_fn = host_fn;
4974 19 : id.dst_fn = current_function_decl;
4975 19 : id.src_cfun = DECL_STRUCT_FUNCTION (id.src_fn);
4976 19 : id.decl_map = &decl_map;
4977 19 : id.copy_decl = copy_decl_no_change;
4978 19 : id.transform_call_graph_edges = CB_CGE_DUPLICATE;
4979 19 : id.transform_new_cfg = true;
4980 19 : id.transform_return_to_modify = false;
4981 19 : id.eh_lp_nr = 0;
4982 19 : walk_tree (&init, set_context_for_auto_vars_r, &id, NULL);
4983 19 : walk_tree (&init, copy_tree_body_r, &id, NULL);
4984 19 : }
4985 : /* Do one initialization or destruction. */
4986 10472 : one_static_initialization_or_destruction (initp, decl, init, omp_target);
4987 : }
4988 5608 : decomp_finalize_var_list (sl, save_stmts_are_full_exprs_p);
4989 :
4990 5608 : if (omp_target)
4991 : {
4992 : /* Finish up nonhost if-stmt body. */
4993 15 : finish_then_clause (nonhost_if_stmt);
4994 15 : finish_if_stmt (nonhost_if_stmt);
4995 : }
4996 :
4997 : /* Finish up the static storage duration function for this
4998 : round. */
4999 5608 : input_location = locus;
5000 5608 : finish_partial_init_fini_fn (body);
5001 :
5002 5608 : return fndecl;
5003 : }
5004 :
5005 : /* VARS is a list of variables with static storage duration which may
5006 : need initialization and/or finalization. Remove those variables
5007 : that don't really need to be initialized or finalized, and return
5008 : the resulting list. The order in which the variables appear in
5009 : VARS is in reverse order of the order in which they should actually
5010 : be initialized. That order is preserved. */
5011 :
5012 : static tree
5013 294618 : prune_vars_needing_no_initialization (tree *vars)
5014 : {
5015 294618 : tree *var = vars;
5016 294618 : tree result = NULL_TREE;
5017 :
5018 305857 : while (*var)
5019 : {
5020 11239 : tree t = *var;
5021 11239 : tree decl = TREE_VALUE (t);
5022 11239 : tree init = TREE_PURPOSE (t);
5023 :
5024 : /* Deal gracefully with error. */
5025 11239 : if (error_operand_p (decl))
5026 : {
5027 0 : var = &TREE_CHAIN (t);
5028 0 : continue;
5029 : }
5030 :
5031 : /* The only things that can be initialized are variables. */
5032 11239 : gcc_assert (VAR_P (decl));
5033 :
5034 : /* If this object is not defined, we don't need to do anything
5035 : here. */
5036 11239 : if (DECL_EXTERNAL (decl))
5037 : {
5038 0 : gcc_checking_assert (!STATIC_INIT_DECOMP_BASE_P (t)
5039 : && !STATIC_INIT_DECOMP_NONBASE_P (t));
5040 0 : var = &TREE_CHAIN (t);
5041 0 : continue;
5042 : }
5043 :
5044 : /* Also, if the initializer already contains errors, we can bail
5045 : out now. */
5046 10515 : if (init && TREE_CODE (init) == TREE_LIST
5047 11239 : && value_member (error_mark_node, init))
5048 : {
5049 0 : var = &TREE_CHAIN (t);
5050 0 : continue;
5051 : }
5052 :
5053 : /* Reflections are consteval-only types and we don't want them
5054 : to survive until gimplification. */
5055 11239 : if (consteval_only_p (decl))
5056 : {
5057 0 : var = &TREE_CHAIN (t);
5058 0 : continue;
5059 : }
5060 :
5061 : /* This variable is going to need initialization and/or
5062 : finalization, so we add it to the list. */
5063 11239 : *var = TREE_CHAIN (t);
5064 11239 : TREE_CHAIN (t) = result;
5065 11239 : result = t;
5066 : }
5067 :
5068 294618 : return result;
5069 : }
5070 :
5071 : /* Split VAR_LIST by init priority and add into PARTS hash table.
5072 : This reverses the variable ordering. */
5073 :
5074 : void
5075 5576 : partition_vars_for_init_fini (tree var_list, priority_map_t *(&parts)[4])
5076 : {
5077 5576 : unsigned priority = 0;
5078 5576 : enum { none, base, nonbase } decomp_state = none;
5079 16020 : for (auto node = var_list; node; node = TREE_CHAIN (node))
5080 : {
5081 10444 : tree decl = TREE_VALUE (node);
5082 10444 : tree init = TREE_PURPOSE (node);
5083 10444 : bool has_cleanup = !TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl));
5084 10444 : if (decomp_state == base && STATIC_INIT_DECOMP_NONBASE_P (node))
5085 : decomp_state = nonbase;
5086 10408 : else if (decomp_state == nonbase && !STATIC_INIT_DECOMP_NONBASE_P (node))
5087 : decomp_state = none;
5088 10423 : if (decomp_state == none)
5089 20641 : priority = DECL_EFFECTIVE_INIT_PRIORITY (decl);
5090 :
5091 10444 : if (init || (flag_use_cxa_atexit && has_cleanup))
5092 : {
5093 : // Add to initialization list.
5094 10438 : if (!parts[true])
5095 5570 : parts[true] = priority_map_t::create_ggc ();
5096 10438 : auto &slot = parts[true]->get_or_insert (priority);
5097 10438 : slot = tree_cons (init, decl, slot);
5098 10438 : if (init
5099 9735 : && STATIC_INIT_DECOMP_BASE_P (node)
5100 10474 : && decomp_state == none)
5101 : {
5102 : /* If one or more STATIC_INIT_DECOMP_BASE_P with at least
5103 : one init is followed by at least one
5104 : STATIC_INIT_DECOMP_NONBASE_P with init, mark it in the
5105 : resulting chain as well. */
5106 36 : for (tree n = TREE_CHAIN (node); n; n = TREE_CHAIN (n))
5107 36 : if (STATIC_INIT_DECOMP_BASE_P (n))
5108 0 : continue;
5109 36 : else if (STATIC_INIT_DECOMP_NONBASE_P (n))
5110 : {
5111 36 : if (TREE_PURPOSE (n))
5112 : {
5113 : decomp_state = base;
5114 : break;
5115 : }
5116 : else
5117 0 : continue;
5118 : }
5119 : else
5120 : break;
5121 : }
5122 10438 : if (init && decomp_state == base)
5123 36 : STATIC_INIT_DECOMP_BASE_P (slot) = 1;
5124 10402 : else if (decomp_state == nonbase)
5125 108 : STATIC_INIT_DECOMP_NONBASE_P (slot) = 1;
5126 : }
5127 :
5128 10444 : if (!flag_use_cxa_atexit && has_cleanup)
5129 : {
5130 : // Add to finalization list.
5131 15 : if (!parts[false])
5132 9 : parts[false] = priority_map_t::create_ggc ();
5133 15 : auto &slot = parts[false]->get_or_insert (priority);
5134 15 : slot = tree_cons (NULL_TREE, decl, slot);
5135 : }
5136 :
5137 10444 : if (flag_openmp
5138 10444 : && lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl)))
5139 : {
5140 19 : priority_map_t **omp_parts = parts + 2;
5141 :
5142 19 : if (init || (flag_use_cxa_atexit && has_cleanup))
5143 : {
5144 : // Add to initialization list.
5145 19 : if (!omp_parts[true])
5146 14 : omp_parts[true] = priority_map_t::create_ggc ();
5147 19 : auto &slot = omp_parts[true]->get_or_insert (priority);
5148 19 : slot = tree_cons (init, decl, slot);
5149 19 : if (init && decomp_state == base)
5150 0 : STATIC_INIT_DECOMP_BASE_P (slot) = 1;
5151 19 : else if (decomp_state == nonbase)
5152 0 : STATIC_INIT_DECOMP_NONBASE_P (slot) = 1;
5153 : }
5154 :
5155 19 : if (!flag_use_cxa_atexit && has_cleanup)
5156 : {
5157 : // Add to finalization list.
5158 0 : if (!omp_parts[false])
5159 0 : omp_parts[false] = priority_map_t::create_ggc ();
5160 0 : auto &slot = omp_parts[false]->get_or_insert (priority);
5161 0 : slot = tree_cons (NULL_TREE, decl, slot);
5162 : }
5163 : }
5164 : }
5165 5576 : }
5166 :
5167 : /* Make sure we have told the back end about all the variables in
5168 : VARS. */
5169 :
5170 : static void
5171 5699 : write_out_vars (tree vars)
5172 : {
5173 5699 : tree v;
5174 :
5175 16938 : for (v = vars; v; v = TREE_CHAIN (v))
5176 : {
5177 11239 : tree var = TREE_VALUE (v);
5178 11239 : if (!var_finalized_p (var))
5179 : {
5180 805 : import_export_decl (var);
5181 805 : rest_of_decl_compilation (var, 1, 1);
5182 : }
5183 : }
5184 5699 : }
5185 :
5186 : /* Generate a static constructor or destructor that calls the given
5187 : init/fini fns at the indicated priority. */
5188 :
5189 : static void
5190 7582 : generate_ctor_or_dtor_function (bool initp, unsigned priority,
5191 : tree fns, location_t locus, bool omp_target)
5192 : {
5193 7582 : input_location = locus;
5194 7582 : tree body = start_objects (initp, priority, bool (fns), omp_target);
5195 :
5196 7582 : if (fns)
5197 : {
5198 : /* To make sure dynamic construction doesn't access globals from
5199 : other compilation units where they might not be yet
5200 : constructed, for -fsanitize=address insert
5201 : __asan_before_dynamic_init call that prevents access to
5202 : either all global variables that need construction in other
5203 : compilation units, or at least those that haven't been
5204 : initialized yet. Variables that need dynamic construction in
5205 : the current compilation unit are kept accessible. */
5206 5648 : if (initp && (flag_sanitize & SANITIZE_ADDRESS))
5207 21 : finish_expr_stmt (asan_dynamic_init_call (/*after_p=*/false));
5208 :
5209 : /* Call the static init/fini functions. */
5210 11311 : for (tree node = fns; node; node = TREE_CHAIN (node))
5211 : {
5212 5663 : tree fn = TREE_PURPOSE (node);
5213 :
5214 : // We should never find a pure or constant cdtor.
5215 5663 : gcc_checking_assert (!(flags_from_decl_or_type (fn)
5216 : & (ECF_CONST | ECF_PURE)));
5217 :
5218 5663 : tree call = cp_build_function_call_nary (fn, tf_warning_or_error,
5219 : NULL_TREE);
5220 5663 : finish_expr_stmt (call);
5221 : }
5222 :
5223 : /* Revert what __asan_before_dynamic_init did by calling
5224 : __asan_after_dynamic_init. */
5225 5648 : if (initp && (flag_sanitize & SANITIZE_ADDRESS))
5226 21 : finish_expr_stmt (asan_dynamic_init_call (/*after_p=*/true));
5227 : }
5228 :
5229 : /* Close out the function, and arrange for it to be called at init
5230 : or fini time, if non-empty. (Even non-nop module initializer
5231 : functions need this, as we cannot guarantee the module is
5232 : imported somewhere in the program.) */
5233 7582 : expand_or_defer_fn (finish_objects (initp, priority, body, fns != NULL_TREE));
5234 7582 : }
5235 :
5236 : /* Return C++ property of T, based on given operation OP. */
5237 :
5238 : static int
5239 1941 : cpp_check (tree t, cpp_operation op)
5240 : {
5241 1941 : switch (op)
5242 : {
5243 9 : case HAS_DEPENDENT_TEMPLATE_ARGS:
5244 9 : {
5245 9 : tree ti = CLASSTYPE_TEMPLATE_INFO (t);
5246 9 : if (!ti)
5247 : return 0;
5248 9 : ++processing_template_decl;
5249 9 : const bool dep = any_dependent_template_arguments_p (TI_ARGS (ti));
5250 9 : --processing_template_decl;
5251 9 : return dep;
5252 : }
5253 294 : case IS_ABSTRACT:
5254 294 : return DECL_PURE_VIRTUAL_P (t);
5255 165 : case IS_ASSIGNMENT_OPERATOR:
5256 165 : return DECL_ASSIGNMENT_OPERATOR_P (t);
5257 165 : case IS_CONSTRUCTOR:
5258 330 : return DECL_CONSTRUCTOR_P (t);
5259 165 : case IS_DESTRUCTOR:
5260 330 : return DECL_DESTRUCTOR_P (t);
5261 165 : case IS_COPY_CONSTRUCTOR:
5262 477 : return DECL_COPY_CONSTRUCTOR_P (t);
5263 165 : case IS_MOVE_CONSTRUCTOR:
5264 483 : return DECL_MOVE_CONSTRUCTOR_P (t);
5265 447 : case IS_TEMPLATE:
5266 447 : return TREE_CODE (t) == TEMPLATE_DECL;
5267 366 : case IS_TRIVIAL:
5268 366 : return trivial_type_p (t);
5269 : default:
5270 : return 0;
5271 : }
5272 : }
5273 :
5274 : /* Collect source file references recursively, starting from NAMESPC. */
5275 :
5276 : static void
5277 78 : collect_source_refs (tree namespc)
5278 : {
5279 : /* Iterate over names in this name space. */
5280 183718 : for (tree t = NAMESPACE_LEVEL (namespc)->names; t; t = TREE_CHAIN (t))
5281 183640 : if (DECL_IS_UNDECLARED_BUILTIN (t))
5282 : ;
5283 240 : else if (TREE_CODE (t) == NAMESPACE_DECL && !DECL_NAMESPACE_ALIAS (t))
5284 3 : collect_source_refs (t);
5285 : else
5286 237 : collect_source_ref (DECL_SOURCE_FILE (t));
5287 78 : }
5288 :
5289 : /* Collect decls relevant to SOURCE_FILE from all namespaces recursively,
5290 : starting from NAMESPC. */
5291 :
5292 : static void
5293 228 : collect_ada_namespace (tree namespc, const char *source_file)
5294 : {
5295 228 : tree decl = NAMESPACE_LEVEL (namespc)->names;
5296 :
5297 : /* Collect decls from this namespace. This will skip
5298 : NAMESPACE_DECLs (both aliases and regular, it cannot tell). */
5299 228 : collect_ada_nodes (decl, source_file);
5300 :
5301 : /* Now scan for namespace children, and dump them. */
5302 219896 : for (; decl; decl = TREE_CHAIN (decl))
5303 219440 : if (TREE_CODE (decl) == NAMESPACE_DECL && !DECL_NAMESPACE_ALIAS (decl))
5304 153 : collect_ada_namespace (decl, source_file);
5305 228 : }
5306 :
5307 : /* Returns true iff there is a definition available for variable or
5308 : function DECL. */
5309 :
5310 : bool
5311 83728580 : decl_defined_p (tree decl)
5312 : {
5313 83728580 : if (TREE_CODE (decl) == FUNCTION_DECL)
5314 75309320 : return (DECL_INITIAL (decl) != NULL_TREE
5315 : /* A pending instantiation of a friend temploid is defined. */
5316 75309320 : || (DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
5317 7661257 : && DECL_INITIAL (DECL_TEMPLATE_RESULT
5318 : (DECL_TI_TEMPLATE (decl)))));
5319 : else
5320 : {
5321 8419260 : gcc_assert (VAR_P (decl));
5322 8419260 : return (!DECL_EXTERNAL (decl)
5323 : /* An initialized variable is defined even if we've decided not
5324 : to emit it, unless it's initialized within the class and not
5325 : inline. Note that finish_static_member_decl doesn't set
5326 : DECL_IN_AGGR_P for inline variables, so we don't need to check
5327 : DECL_INLINE_VAR_P here. */
5328 8419260 : || (DECL_INITIAL (decl) && !DECL_IN_AGGR_P (decl)));
5329 : }
5330 : }
5331 :
5332 : /* Nonzero for a VAR_DECL whose value can be used in a constant expression.
5333 :
5334 : [expr.const]
5335 :
5336 : An integral constant-expression can only involve ... const
5337 : variables of integral or enumeration types initialized with
5338 : constant expressions ...
5339 :
5340 : C++0x also allows constexpr variables and temporaries initialized
5341 : with constant expressions. We handle the former here, but the latter
5342 : are just folded away in cxx_eval_constant_expression.
5343 :
5344 : The standard does not require that the expression be non-volatile.
5345 : G++ implements the proposed correction in DR 457. */
5346 :
5347 : bool
5348 1166465590 : decl_constant_var_p (tree decl)
5349 : {
5350 1166465590 : if (!decl_maybe_constant_var_p (decl))
5351 : return false;
5352 :
5353 : /* We don't know if a template static data member is initialized with
5354 : a constant expression until we instantiate its initializer. Even
5355 : in the case of a constexpr variable, we can't treat it as a
5356 : constant until its initializer is complete in case it's used in
5357 : its own initializer. */
5358 147579750 : maybe_instantiate_decl (decl);
5359 147577053 : return DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl);
5360 : }
5361 :
5362 : /* Returns true if DECL could be a symbolic constant variable, depending on
5363 : its initializer. */
5364 :
5365 : bool
5366 1536582958 : decl_maybe_constant_var_p (tree decl)
5367 : {
5368 1536582958 : tree type = TREE_TYPE (decl);
5369 1536582958 : if (!VAR_P (decl))
5370 : return false;
5371 727347732 : if (DECL_DECLARED_CONSTEXPR_P (decl)
5372 727347732 : && (!TREE_THIS_VOLATILE (decl) || NULLPTR_TYPE_P (type)))
5373 : return true;
5374 410135409 : if (DECL_HAS_VALUE_EXPR_P (decl))
5375 : /* A proxy isn't constant. */
5376 : return false;
5377 407214491 : if (TYPE_REF_P (type))
5378 : /* References can be constant. */;
5379 400908327 : else if (CP_TYPE_CONST_NON_VOLATILE_P (type)
5380 400908327 : && INTEGRAL_OR_ENUMERATION_TYPE_P (type))
5381 : /* And const integers. */;
5382 : else
5383 : return false;
5384 :
5385 85324114 : if (DECL_INITIAL (decl)
5386 132145428 : && !DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
5387 : /* We know the initializer, and it isn't constant. */
5388 : return false;
5389 : else
5390 : return true;
5391 : }
5392 :
5393 : /* Complain that DECL uses a type with no linkage. In C++98 mode this is
5394 : called from grokfndecl and grokvardecl; in all modes it is called from
5395 : cp_write_global_declarations. */
5396 :
5397 : void
5398 1601006 : no_linkage_error (tree decl)
5399 : {
5400 1601006 : if (cxx_dialect >= cxx11
5401 1601006 : && (decl_defined_p (decl)
5402 : /* Treat templates which limit_bad_template_recursion decided
5403 : not to instantiate as if they were defined. */
5404 131 : || (errorcount + sorrycount > 0
5405 53 : && DECL_LANG_SPECIFIC (decl)
5406 53 : && DECL_TEMPLATE_INFO (decl)
5407 33 : && warning_suppressed_p (decl /* What warning? */))))
5408 : /* In C++11 it's ok if the decl is defined. */
5409 523407 : return;
5410 :
5411 1077599 : if (DECL_LANG_SPECIFIC (decl) && DECL_MODULE_IMPORT_P (decl))
5412 : /* An imported decl is ok. */
5413 : return;
5414 :
5415 : /* Metafunctions are magic and should be considered defined even though
5416 : they have no bodies. ??? This can't be checked in decl_defined_p;
5417 : we'd get redefinition errors for some of our metafunctions. */
5418 1077554 : if (TREE_CODE (decl) == FUNCTION_DECL && metafunction_p (decl))
5419 : return;
5420 :
5421 1077548 : tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
5422 1077548 : if (t == NULL_TREE)
5423 : /* The type that got us on no_linkage_decls must have gotten a name for
5424 : linkage purposes. */;
5425 74 : else if (CLASS_TYPE_P (t) && TYPE_BEING_DEFINED (t))
5426 : // FIXME: This is now invalid, as a DR to c++98
5427 : /* The type might end up having a typedef name for linkage purposes. */
5428 0 : vec_safe_push (no_linkage_decls, decl);
5429 201 : else if (TYPE_UNNAMED_P (t))
5430 : {
5431 26 : bool d = false;
5432 26 : auto_diagnostic_group grp;
5433 26 : if (cxx_dialect >= cxx11)
5434 : {
5435 : /* If t is declared in a module CMI, then decl could actually
5436 : be defined in a different TU, so don't warn since C++20. */
5437 9 : tree relaxed = no_linkage_check (t, /*relaxed_p=*/true);
5438 9 : if (relaxed != NULL_TREE)
5439 9 : d = permerror (DECL_SOURCE_LOCATION (decl),
5440 : "%q#D, declared using an unnamed type, "
5441 : "is used but never defined", decl);
5442 0 : else if (cxx_dialect < cxx20)
5443 0 : d = pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wc__20_extensions,
5444 : "%q#D, declared using an unnamed type, "
5445 : "is used but not defined", decl);
5446 : }
5447 17 : else if (DECL_EXTERN_C_P (decl))
5448 : /* Allow this; it's pretty common in C. */;
5449 17 : else if (VAR_P (decl))
5450 : /* DRs 132, 319 and 389 seem to indicate types with
5451 : no linkage can only be used to declare extern "C"
5452 : entities. Since it's not always an error in the
5453 : ISO C++ 90 Standard, we only issue a warning. */
5454 16 : d = warning_at (DECL_SOURCE_LOCATION (decl), 0, "unnamed type "
5455 : "with no linkage used to declare variable %q#D with "
5456 : "linkage", decl);
5457 : else
5458 1 : d = permerror (DECL_SOURCE_LOCATION (decl), "unnamed type with no "
5459 : "linkage used to declare function %q#D with linkage",
5460 : decl);
5461 26 : if (d && is_typedef_decl (TYPE_NAME (t)))
5462 0 : inform (DECL_SOURCE_LOCATION (TYPE_NAME (t)), "%q#D does not refer "
5463 : "to the unqualified type, so it is not used for linkage",
5464 0 : TYPE_NAME (t));
5465 : /* Suppress warning from check_global_declaration if needed. */
5466 26 : if (d)
5467 23 : suppress_warning (decl, OPT_Wunused);
5468 26 : }
5469 48 : else if (cxx_dialect >= cxx11)
5470 : {
5471 48 : if (VAR_P (decl) || !DECL_PURE_VIRTUAL_P (decl))
5472 : {
5473 : /* Similarly for local types in a function with vague linkage or
5474 : defined in a module CMI, then decl could actually be defined
5475 : in a different TU, so don't warn since C++20. */
5476 45 : bool d = false;
5477 45 : tree relaxed = no_linkage_check (t, /*relaxed_p=*/true);
5478 45 : if (relaxed != NULL_TREE)
5479 30 : d = permerror (DECL_SOURCE_LOCATION (decl),
5480 : "%q#D, declared using local type "
5481 : "%qT, is used but never defined", decl, t);
5482 15 : else if (cxx_dialect < cxx20)
5483 3 : d = pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wc__20_extensions,
5484 : "%q#D, declared using local type "
5485 : "%qT, is used but not defined here", decl, t);
5486 : /* Suppress warning from check_global_declaration if needed. */
5487 33 : if (d)
5488 33 : suppress_warning (decl, OPT_Wunused);
5489 : }
5490 : }
5491 0 : else if (VAR_P (decl))
5492 0 : warning_at (DECL_SOURCE_LOCATION (decl), 0, "type %qT with no linkage "
5493 : "used to declare variable %q#D with linkage", t, decl);
5494 : else
5495 0 : permerror (DECL_SOURCE_LOCATION (decl), "type %qT with no linkage used "
5496 : "to declare function %q#D with linkage", t, decl);
5497 : }
5498 :
5499 : /* Collect declarations from all namespaces relevant to SOURCE_FILE. */
5500 :
5501 : static void
5502 75 : collect_all_refs (const char *source_file)
5503 : {
5504 75 : collect_ada_namespace (global_namespace, source_file);
5505 75 : }
5506 :
5507 : /* Clear DECL_EXTERNAL for NODE. */
5508 :
5509 : static bool
5510 154932570 : clear_decl_external (struct cgraph_node *node, void * /*data*/)
5511 : {
5512 154932570 : DECL_EXTERNAL (node->decl) = 0;
5513 154932570 : return false;
5514 : }
5515 :
5516 : /* Build up the function to run dynamic initializers for thread_local
5517 : variables in this translation unit and alias the init functions for the
5518 : individual variables to it. */
5519 :
5520 : static void
5521 147309 : handle_tls_init (void)
5522 : {
5523 147309 : tree vars = prune_vars_needing_no_initialization (&tls_aggregates);
5524 147309 : if (vars == NULL_TREE)
5525 147186 : return;
5526 :
5527 123 : location_t loc = DECL_SOURCE_LOCATION (TREE_VALUE (vars));
5528 :
5529 123 : write_out_vars (vars);
5530 :
5531 123 : tree guard = build_decl (loc, VAR_DECL, get_identifier ("__tls_guard"),
5532 : boolean_type_node);
5533 123 : TREE_PUBLIC (guard) = false;
5534 123 : TREE_STATIC (guard) = true;
5535 123 : DECL_ARTIFICIAL (guard) = true;
5536 123 : DECL_IGNORED_P (guard) = true;
5537 123 : TREE_USED (guard) = true;
5538 123 : CP_DECL_THREAD_LOCAL_P (guard) = true;
5539 123 : set_decl_tls_model (guard, decl_default_tls_model (guard));
5540 123 : pushdecl_top_level_and_finish (guard, NULL_TREE);
5541 :
5542 123 : tree fn = get_local_tls_init_fn (loc);
5543 123 : start_preparsed_function (fn, NULL_TREE, SF_PRE_PARSED);
5544 123 : tree body = begin_function_body ();
5545 123 : tree if_stmt = begin_if_stmt ();
5546 123 : tree cond = cp_build_unary_op (TRUTH_NOT_EXPR, guard, false,
5547 : tf_warning_or_error);
5548 123 : finish_if_stmt_cond (cond, if_stmt);
5549 123 : finish_expr_stmt (cp_build_modify_expr (loc, guard, NOP_EXPR,
5550 : boolean_true_node,
5551 : tf_warning_or_error));
5552 123 : tree sl = NULL_TREE;
5553 123 : int save_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5554 123 : bool saw_nonbase = false;
5555 918 : for (; vars; vars = TREE_CHAIN (vars))
5556 : {
5557 795 : tree var = TREE_VALUE (vars);
5558 795 : tree init = TREE_PURPOSE (vars);
5559 795 : sl = decomp_handle_one_var (vars, sl, &saw_nonbase,
5560 : save_stmts_are_full_exprs_p);
5561 795 : one_static_initialization_or_destruction (/*initp=*/true, var, init,
5562 : false);
5563 :
5564 : /* Output init aliases even with -fno-extern-tls-init. */
5565 795 : if (TARGET_SUPPORTS_ALIASES && TREE_PUBLIC (var))
5566 : {
5567 696 : tree single_init_fn = get_tls_init_fn (var);
5568 696 : if (single_init_fn == NULL_TREE)
5569 0 : continue;
5570 696 : cgraph_node *alias
5571 696 : = cgraph_node::get_create (fn)->create_same_body_alias
5572 696 : (single_init_fn, fn);
5573 696 : gcc_assert (alias != NULL);
5574 : }
5575 : }
5576 123 : decomp_finalize_var_list (sl, save_stmts_are_full_exprs_p);
5577 :
5578 123 : finish_then_clause (if_stmt);
5579 123 : finish_if_stmt (if_stmt);
5580 123 : finish_function_body (body);
5581 123 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
5582 : }
5583 :
5584 : /* We're at the end of compilation, so generate any mangling aliases that
5585 : we've been saving up, if DECL is going to be output and ID2 isn't
5586 : already taken by another declaration. */
5587 :
5588 : static void
5589 36647 : generate_mangling_alias (tree decl, tree id2)
5590 : {
5591 36647 : struct cgraph_node *n = NULL;
5592 :
5593 36647 : if (TREE_CODE (decl) == FUNCTION_DECL)
5594 : {
5595 36573 : n = cgraph_node::get (decl);
5596 36573 : if (!n)
5597 : /* Don't create an alias to an unreferenced function. */
5598 : return;
5599 : }
5600 :
5601 36647 : tree *slot
5602 36647 : = mangled_decls->find_slot_with_hash (id2, IDENTIFIER_HASH_VALUE (id2),
5603 : INSERT);
5604 :
5605 : /* If there's a declaration already using this mangled name,
5606 : don't create a compatibility alias that conflicts. */
5607 36647 : if (*slot)
5608 : return;
5609 :
5610 36617 : tree alias = make_alias_for (decl, id2);
5611 36617 : *slot = alias;
5612 :
5613 36617 : DECL_IGNORED_P (alias) = 1;
5614 36617 : TREE_PUBLIC (alias) = TREE_PUBLIC (decl);
5615 36617 : DECL_VISIBILITY (alias) = DECL_VISIBILITY (decl);
5616 36617 : if (vague_linkage_p (decl))
5617 36459 : DECL_WEAK (alias) = 1;
5618 :
5619 36617 : if (n)
5620 36543 : n->create_same_body_alias (alias, decl);
5621 : else
5622 74 : varpool_node::create_extra_name_alias (alias, decl);
5623 : }
5624 :
5625 : /* Note that we might want to emit an alias with the symbol ID2 for DECL at
5626 : the end of translation, for compatibility across bugs in the mangling
5627 : implementation. */
5628 :
5629 : void
5630 36671 : note_mangling_alias (tree decl, tree id2)
5631 : {
5632 36671 : if (TARGET_SUPPORTS_ALIASES)
5633 : {
5634 36671 : if (!defer_mangling_aliases)
5635 25330 : generate_mangling_alias (decl, id2);
5636 : else
5637 : {
5638 11341 : vec_safe_push (mangling_aliases, decl);
5639 11341 : vec_safe_push (mangling_aliases, id2);
5640 : }
5641 : }
5642 36671 : }
5643 :
5644 : /* Emit all mangling aliases that were deferred up to this point. */
5645 :
5646 : void
5647 100480 : generate_mangling_aliases ()
5648 : {
5649 111797 : while (!vec_safe_is_empty (mangling_aliases))
5650 : {
5651 11317 : tree id2 = mangling_aliases->pop();
5652 11317 : tree decl = mangling_aliases->pop();
5653 11317 : generate_mangling_alias (decl, id2);
5654 : }
5655 100480 : defer_mangling_aliases = false;
5656 100480 : }
5657 :
5658 : /* Record a mangling of DECL, whose DECL_ASSEMBLER_NAME has just been
5659 : set. NEED_WARNING is true if we must warn about collisions. We do
5660 : this to spot changes in mangling that may require compatibility
5661 : aliases. */
5662 :
5663 : void
5664 85214251 : record_mangling (tree decl, bool need_warning)
5665 : {
5666 85214251 : if (!mangled_decls)
5667 77159 : mangled_decls = hash_table<mangled_decl_hash>::create_ggc (499);
5668 :
5669 85214251 : gcc_checking_assert (DECL_ASSEMBLER_NAME_SET_P (decl));
5670 85214251 : tree id = DECL_ASSEMBLER_NAME_RAW (decl);
5671 85214251 : tree *slot
5672 85214251 : = mangled_decls->find_slot_with_hash (id, IDENTIFIER_HASH_VALUE (id),
5673 : INSERT);
5674 :
5675 : /* If this is already an alias, cancel the alias, because the real
5676 : decl takes precedence. */
5677 85214251 : if (*slot && DECL_ARTIFICIAL (*slot) && DECL_IGNORED_P (*slot))
5678 : {
5679 27 : if (symtab_node *n = symtab_node::get (*slot))
5680 : {
5681 27 : if (n->cpp_implicit_alias)
5682 : /* Actually removing the node isn't safe if other code is already
5683 : holding a pointer to it, so just neutralize it. */
5684 27 : n->reset ();
5685 : }
5686 : else
5687 : /* analyze_functions might have already removed the alias from the
5688 : symbol table if it's internal. */
5689 0 : gcc_checking_assert (!TREE_PUBLIC (*slot));
5690 :
5691 27 : *slot = NULL_TREE;
5692 : }
5693 :
5694 85214251 : if (!*slot)
5695 85214043 : *slot = decl;
5696 208 : else if (need_warning)
5697 : {
5698 3 : auto_diagnostic_group d;
5699 3 : error_at (DECL_SOURCE_LOCATION (decl),
5700 : "mangling of %q#D as %qE conflicts with a previous mangle",
5701 : decl, id);
5702 3 : inform (DECL_SOURCE_LOCATION (*slot),
5703 : "previous mangling %q#D", *slot);
5704 3 : inform (DECL_SOURCE_LOCATION (decl),
5705 : "a later %<-fabi-version=%> (or =0)"
5706 : " avoids this error with a change in mangling");
5707 3 : *slot = decl;
5708 3 : }
5709 85214251 : }
5710 :
5711 : /* The mangled name of DECL is being forcibly changed to NAME. Remove
5712 : any existing knowledge of DECL's mangled name meaning DECL. */
5713 :
5714 : void
5715 278692049 : overwrite_mangling (tree decl, tree name)
5716 : {
5717 278692049 : if (tree id = DECL_ASSEMBLER_NAME_RAW (decl))
5718 247423 : if ((TREE_CODE (decl) == VAR_DECL
5719 247330 : || TREE_CODE (decl) == FUNCTION_DECL)
5720 247423 : && mangled_decls)
5721 481328 : if (tree *slot
5722 240664 : = mangled_decls->find_slot_with_hash (id, IDENTIFIER_HASH_VALUE (id),
5723 : NO_INSERT))
5724 130479 : if (*slot == decl)
5725 : {
5726 75 : mangled_decls->clear_slot (slot);
5727 :
5728 : /* If this is an alias, remove it from the symbol table. */
5729 75 : if (DECL_ARTIFICIAL (decl) && DECL_IGNORED_P (decl))
5730 0 : if (symtab_node *n = symtab_node::get (decl))
5731 0 : if (n->cpp_implicit_alias)
5732 0 : n->remove ();
5733 : }
5734 :
5735 278692049 : DECL_ASSEMBLER_NAME_RAW (decl) = name;
5736 278692049 : }
5737 :
5738 : /* The entire file is now complete. If requested, dump everything
5739 : to a file. */
5740 :
5741 : static void
5742 100577 : dump_tu (void)
5743 : {
5744 100577 : dump_flags_t flags;
5745 100577 : if (FILE *stream = dump_begin (raw_dump_id, &flags))
5746 : {
5747 6 : dump_node (global_namespace, flags & ~TDF_SLIM, stream);
5748 6 : dump_end (raw_dump_id, stream);
5749 : }
5750 100577 : }
5751 :
5752 : static location_t locus_at_end_of_parsing;
5753 :
5754 : /* Check the deallocation functions for CODE to see if we want to warn that
5755 : only one was defined. */
5756 :
5757 : static void
5758 1948 : maybe_warn_sized_delete (enum tree_code code)
5759 : {
5760 1948 : tree sized = NULL_TREE;
5761 1948 : tree unsized = NULL_TREE;
5762 :
5763 10738 : for (ovl_iterator iter (get_global_binding (ovl_op_identifier (false, code)));
5764 10738 : iter; ++iter)
5765 : {
5766 8790 : tree fn = *iter;
5767 : /* We're only interested in usual deallocation functions. */
5768 8790 : if (!usual_deallocation_fn_p (fn))
5769 998 : continue;
5770 7792 : if (FUNCTION_ARG_CHAIN (fn) == void_list_node)
5771 : unsized = fn;
5772 : else
5773 5840 : sized = fn;
5774 : }
5775 1948 : if (DECL_INITIAL (unsized) && !DECL_INITIAL (sized))
5776 6 : warning_at (DECL_SOURCE_LOCATION (unsized), OPT_Wsized_deallocation,
5777 : "the program should also define %qD", sized);
5778 1942 : else if (!DECL_INITIAL (unsized) && DECL_INITIAL (sized))
5779 4 : warning_at (DECL_SOURCE_LOCATION (sized), OPT_Wsized_deallocation,
5780 : "the program should also define %qD", unsized);
5781 1948 : }
5782 :
5783 : /* Check the global deallocation functions to see if we want to warn about
5784 : defining unsized without sized (or vice versa). */
5785 :
5786 : static void
5787 100480 : maybe_warn_sized_delete ()
5788 : {
5789 100480 : if (!flag_sized_deallocation || !warn_sized_deallocation)
5790 : return;
5791 974 : maybe_warn_sized_delete (DELETE_EXPR);
5792 974 : maybe_warn_sized_delete (VEC_DELETE_EXPR);
5793 : }
5794 :
5795 : /* Earlier we left PTRMEM_CST in variable initializers alone so that we could
5796 : look them up when evaluating non-type template parameters. Now we need to
5797 : lower them to something the back end can understand. */
5798 :
5799 : static void
5800 100480 : lower_var_init ()
5801 : {
5802 100480 : varpool_node *node;
5803 34059469 : FOR_EACH_VARIABLE (node)
5804 : {
5805 33958989 : tree d = node->decl;
5806 33958989 : if (tree init = DECL_INITIAL (d))
5807 31482686 : DECL_INITIAL (d) = cplus_expand_constant (init);
5808 : }
5809 100480 : }
5810 :
5811 : /* This routine is called at the end of compilation.
5812 : Its job is to create all the code needed to initialize and
5813 : destroy the global aggregates. We do the destruction
5814 : first, since that way we only need to reverse the decls once. */
5815 :
5816 : void
5817 100592 : c_parse_final_cleanups (void)
5818 : {
5819 100592 : size_t i;
5820 100592 : tree decl;
5821 :
5822 100592 : locus_at_end_of_parsing = input_location;
5823 : /* We're done parsing. */
5824 100592 : at_eof = 1;
5825 :
5826 : /* Bad parse errors. Just forget about it. */
5827 201184 : if (! global_bindings_p () || current_class_type
5828 201184 : || !vec_safe_is_empty (decl_namespace_list))
5829 100 : return;
5830 :
5831 : /* This is the point to write out a PCH if we're doing that.
5832 : In that case we do not want to do anything else. */
5833 100589 : if (pch_file)
5834 : {
5835 : /* Mangle all symbols at PCH creation time. */
5836 97 : symtab_node *node;
5837 49560 : FOR_EACH_SYMBOL (node)
5838 49463 : if (! is_a <varpool_node *> (node)
5839 16342 : || ! DECL_HARD_REGISTER (node->decl))
5840 49463 : DECL_ASSEMBLER_NAME (node->decl);
5841 97 : c_common_write_pch ();
5842 97 : dump_tu ();
5843 : /* Ensure even the callers don't try to finalize the CU. */
5844 97 : flag_syntax_only = 1;
5845 97 : return;
5846 : }
5847 :
5848 100492 : timevar_stop (TV_PHASE_PARSING);
5849 100492 : timevar_start (TV_PHASE_DEFERRED);
5850 :
5851 100492 : symtab->process_same_body_aliases ();
5852 :
5853 : /* Handle -fdump-ada-spec[-slim] */
5854 100492 : if (flag_dump_ada_spec || flag_dump_ada_spec_slim)
5855 : {
5856 75 : collect_source_ref (main_input_filename);
5857 75 : if (!flag_dump_ada_spec_slim)
5858 75 : collect_source_refs (global_namespace);
5859 :
5860 75 : dump_ada_specs (collect_all_refs, cpp_check);
5861 : }
5862 :
5863 : /* FIXME - huh? was input_line -= 1;*/
5864 :
5865 : /* We now have to write out all the stuff we put off writing out.
5866 : These include:
5867 :
5868 : o Template specializations that we have not yet instantiated,
5869 : but which are needed.
5870 : o Initialization and destruction for non-local objects with
5871 : static storage duration. (Local objects with static storage
5872 : duration are initialized when their scope is first entered,
5873 : and are cleaned up via atexit.)
5874 : o Virtual function tables.
5875 :
5876 : All of these may cause others to be needed. For example,
5877 : instantiating one function may cause another to be needed, and
5878 : generating the initializer for an object may cause templates to be
5879 : instantiated, etc., etc. */
5880 :
5881 100492 : emit_support_tinfos ();
5882 :
5883 : /* Track vtables we want to emit that refer to consteval functions. */
5884 100492 : auto_vec<tree> consteval_vtables;
5885 :
5886 100492 : int retries = 0;
5887 100492 : unsigned ssdf_count = 0, omp_ssdf_count = 0;
5888 248716 : for (bool reconsider = true; reconsider; retries++)
5889 : {
5890 148236 : reconsider = false;
5891 :
5892 : /* If there are templates that we've put off instantiating, do
5893 : them now. */
5894 148236 : instantiate_pending_templates (retries);
5895 148224 : ggc_collect ();
5896 :
5897 148224 : if (header_module_p ())
5898 : /* A header modules initializations are handled in its
5899 : importer. */
5900 915 : continue;
5901 :
5902 : /* Emit wrappers where needed, and if that causes more to be added then
5903 : make sure we account for possible additional instantiations. */
5904 147309 : if (flag_contracts)
5905 31913 : if (emit_contract_wrapper_func (/*done*/false))
5906 147309 : reconsider = true;
5907 :
5908 : /* Write out virtual tables as required. Writing out the
5909 : virtual table for a template class may cause the
5910 : instantiation of members of that class. If we write out
5911 : vtables then we remove the class from our list so we don't
5912 : have to look at it again. */
5913 147309 : tree t;
5914 147309 : for (i = keyed_classes->length ();
5915 3855243 : keyed_classes->iterate (--i, &t);)
5916 3707934 : if (maybe_emit_vtables (t, consteval_vtables))
5917 : {
5918 353658 : reconsider = true;
5919 353658 : keyed_classes->unordered_remove (i);
5920 : }
5921 : /* The input_location may have been changed during marking of
5922 : vtable entries. */
5923 147309 : input_location = locus_at_end_of_parsing;
5924 :
5925 : /* Write out needed type info variables. We have to be careful
5926 : looping through unemitted decls, because emit_tinfo_decl may
5927 : cause other variables to be needed. New elements will be
5928 : appended, and we remove from the vector those that actually
5929 : get emitted. */
5930 147309 : for (i = unemitted_tinfo_decls->length ();
5931 6118135 : unemitted_tinfo_decls->iterate (--i, &t);)
5932 5970826 : if (DECL_INITIAL (t) || emit_tinfo_decl (t))
5933 : {
5934 440711 : reconsider = true;
5935 440711 : unemitted_tinfo_decls->unordered_remove (i);
5936 : }
5937 :
5938 : /* The list of objects with static storage duration is built up
5939 : in reverse order. We clear STATIC_AGGREGATES so that any new
5940 : aggregates added during the initialization of these will be
5941 : initialized in the correct order when we next come around the
5942 : loop. */
5943 147309 : if (tree vars = prune_vars_needing_no_initialization (&static_aggregates))
5944 : {
5945 5576 : if (flag_openmp)
5946 : /* Add initializer information from VARS into
5947 : DYNAMIC_INITIALIZERS. */
5948 394 : for (t = vars; t; t = TREE_CHAIN (t))
5949 566 : hash_map_safe_put<hm_ggc> (dynamic_initializers,
5950 283 : TREE_VALUE (t), TREE_PURPOSE (t));
5951 :
5952 : /* Make sure the back end knows about all the variables. */
5953 5576 : write_out_vars (vars);
5954 :
5955 5576 : function_depth++; // Disable GC
5956 5576 : priority_map_t *parts[4] = {nullptr, nullptr, nullptr, nullptr};
5957 5576 : partition_vars_for_init_fini (vars, parts);
5958 5576 : tree host_init_fini[2] = { NULL_TREE, NULL_TREE };
5959 :
5960 16728 : for (unsigned initp = 2; initp--;)
5961 11152 : if (parts[initp])
5962 16751 : for (auto iter : *parts[initp])
5963 : {
5964 5593 : auto list = iter.second;
5965 5593 : if (initp)
5966 : // Partitioning kept the vars in reverse order.
5967 : // We only want that for dtors.
5968 5584 : list = nreverse (list);
5969 5593 : host_init_fini[initp]
5970 5593 : = emit_partial_init_fini_fn (initp, iter.first, list,
5971 : ssdf_count++,
5972 : locus_at_end_of_parsing,
5973 : NULL_TREE);
5974 : }
5975 :
5976 5576 : if (flag_openmp)
5977 : {
5978 : priority_map_t **omp_parts = parts + 2;
5979 333 : for (unsigned initp = 2; initp--;)
5980 222 : if (omp_parts[initp])
5981 58 : for (auto iter : *omp_parts[initp])
5982 : {
5983 15 : auto list = iter.second;
5984 15 : if (initp)
5985 : // Partitioning kept the vars in reverse order.
5986 : // We only want that for dtors.
5987 15 : list = nreverse (list);
5988 15 : emit_partial_init_fini_fn (initp, iter.first, list,
5989 : omp_ssdf_count++,
5990 : locus_at_end_of_parsing,
5991 : host_init_fini[initp]);
5992 : }
5993 : }
5994 :
5995 5576 : function_depth--; // Re-enable GC
5996 :
5997 : /* All those initializations and finalizations might cause
5998 : us to need more inline functions, more template
5999 : instantiations, etc. */
6000 5576 : reconsider = true;
6001 : }
6002 :
6003 : /* Now do the same for thread_local variables. */
6004 147309 : handle_tls_init ();
6005 :
6006 : /* Go through the set of inline functions whose bodies have not
6007 : been emitted yet. If out-of-line copies of these functions
6008 : are required, emit them. */
6009 194368988 : FOR_EACH_VEC_SAFE_ELT (deferred_fns, i, decl)
6010 : {
6011 : /* Does it need synthesizing? */
6012 200069484 : if (DECL_DEFAULTED_FN (decl) && ! DECL_INITIAL (decl)
6013 194221685 : && (! DECL_REALLY_EXTERN (decl) || possibly_inlined_p (decl)))
6014 : {
6015 : /* Even though we're already at the top-level, we push
6016 : there again. That way, when we pop back a few lines
6017 : hence, all of our state is restored. Otherwise,
6018 : finish_function doesn't clean things up, and we end
6019 : up with CURRENT_FUNCTION_DECL set. */
6020 6 : push_to_top_level ();
6021 : /* The decl's location will mark where it was first
6022 : needed. Save that so synthesize method can indicate
6023 : where it was needed from, in case of error */
6024 6 : input_location = DECL_SOURCE_LOCATION (decl);
6025 6 : synthesize_method (decl);
6026 6 : pop_from_top_level ();
6027 6 : reconsider = true;
6028 : }
6029 :
6030 194221679 : if (!DECL_INITIAL (decl) && decl_tls_wrapper_p (decl))
6031 586 : generate_tls_wrapper (decl);
6032 :
6033 194221679 : if (!DECL_SAVED_TREE (decl))
6034 229530 : continue;
6035 :
6036 193992149 : cgraph_node *node = cgraph_node::get_create (decl);
6037 :
6038 : /* We lie to the back end, pretending that some functions
6039 : are not defined when they really are. This keeps these
6040 : functions from being put out unnecessarily. But, we must
6041 : stop lying when the functions are referenced, or if they
6042 : are not comdat since they need to be put out now. If
6043 : DECL_INTERFACE_KNOWN, then we have already set
6044 : DECL_EXTERNAL appropriately, so there's no need to check
6045 : again, and we do not want to clear DECL_EXTERNAL if a
6046 : previous call to import_export_decl set it.
6047 :
6048 : This is done in a separate for cycle, because if some
6049 : deferred function is contained in another deferred
6050 : function later in deferred_fns varray,
6051 : rest_of_compilation would skip this function and we
6052 : really cannot expand the same function twice. */
6053 193992149 : import_export_decl (decl);
6054 193992149 : if (DECL_NOT_REALLY_EXTERN (decl)
6055 186967673 : && DECL_INITIAL (decl)
6056 380959822 : && decl_needed_p (decl))
6057 : {
6058 122799471 : if (node->cpp_implicit_alias)
6059 10882094 : node = node->get_alias_target ();
6060 :
6061 122799471 : node->call_for_symbol_thunks_and_aliases (clear_decl_external,
6062 : NULL, true);
6063 : /* If we mark !DECL_EXTERNAL one of the symbols in some comdat
6064 : group, we need to mark all symbols in the same comdat group
6065 : that way. */
6066 122799471 : if (node->same_comdat_group)
6067 32109271 : for (cgraph_node *next
6068 15833913 : = dyn_cast<cgraph_node *> (node->same_comdat_group);
6069 32109271 : next != node;
6070 48384629 : next = dyn_cast<cgraph_node *> (next->same_comdat_group))
6071 16275358 : next->call_for_symbol_thunks_and_aliases (clear_decl_external,
6072 : NULL, true);
6073 : }
6074 :
6075 : /* If we're going to need to write this function out, and
6076 : there's already a body for it, create RTL for it now.
6077 : (There might be no body if this is a method we haven't
6078 : gotten around to synthesizing yet.) */
6079 193992149 : if (!DECL_EXTERNAL (decl)
6080 125885386 : && decl_needed_p (decl)
6081 123522535 : && !TREE_ASM_WRITTEN (decl)
6082 226280538 : && !DECL_IMMEDIATE_FUNCTION_P (decl)
6083 301163446 : && !node->definition)
6084 : {
6085 : /* We will output the function; no longer consider it in this
6086 : loop. */
6087 0 : DECL_DEFER_OUTPUT (decl) = 0;
6088 : /* Generate RTL for this function now that we know we
6089 : need it. */
6090 0 : expand_or_defer_fn (decl);
6091 0 : reconsider = true;
6092 : }
6093 : }
6094 :
6095 147309 : if (wrapup_namespace_globals ())
6096 586 : reconsider = true;
6097 :
6098 : /* Static data members are just like namespace-scope globals. */
6099 101801268 : FOR_EACH_VEC_SAFE_ELT (pending_statics, i, decl)
6100 : {
6101 188137415 : if (consteval_only_p (decl)
6102 101653627 : || var_finalized_p (decl)
6103 26383949 : || DECL_REALLY_EXTERN (decl)
6104 : /* Don't write it out if we haven't seen a definition. */
6105 116831685 : || DECL_IN_AGGR_P (decl))
6106 86483456 : continue;
6107 15170503 : import_export_decl (decl);
6108 : /* If this static data member is needed, provide it to the
6109 : back end. */
6110 15170503 : if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
6111 15138913 : DECL_EXTERNAL (decl) = 0;
6112 : }
6113 :
6114 295533 : if (vec_safe_length (pending_statics) != 0
6115 119270 : && wrapup_global_declarations (pending_statics->address (),
6116 59635 : pending_statics->length ()))
6117 : reconsider = true;
6118 : }
6119 :
6120 100480 : if (flag_contracts)
6121 : {
6122 24956 : emit_contract_wrapper_func (/*done*/true);
6123 24956 : maybe_emit_violation_handler_wrappers ();
6124 : }
6125 :
6126 : /* All templates have been instantiated. */
6127 100480 : at_eof = 2;
6128 :
6129 100480 : void *module_cookie = finish_module_processing (parse_in);
6130 :
6131 100480 : lower_var_init ();
6132 :
6133 100480 : generate_mangling_aliases ();
6134 :
6135 : /* All used inline functions must have a definition at this point. */
6136 51010093 : FOR_EACH_VEC_SAFE_ELT (deferred_fns, i, decl)
6137 : {
6138 50909613 : if (/* Check online inline functions that were actually used. */
6139 82995862 : DECL_ODR_USED (decl) && DECL_DECLARED_INLINE_P (decl)
6140 : /* If the definition actually was available here, then the
6141 : fact that the function was not defined merely represents
6142 : that for some reason (use of a template repository,
6143 : #pragma interface, etc.) we decided not to emit the
6144 : definition here. */
6145 32084831 : && !DECL_INITIAL (decl)
6146 : /* A defaulted fn or TLS wrapper in a header module can be
6147 : synthesized on demand later. (In non-header modules we
6148 : should have synthesized it above.) */
6149 9350 : && !(header_module_p ()
6150 16 : && (DECL_DEFAULTED_FN (decl) || decl_tls_wrapper_p (decl)))
6151 : /* Metafunctions are never defined. */
6152 9344 : && !metafunction_p (decl)
6153 : /* Don't complain if the template was defined. */
6154 800 : && !(DECL_TEMPLOID_INSTANTIATION (decl)
6155 714 : && DECL_INITIAL (DECL_TEMPLATE_RESULT
6156 : (template_for_substitution (decl))))
6157 82995862 : && warning_at (DECL_SOURCE_LOCATION (decl), 0,
6158 : "inline function %qD used but never defined", decl))
6159 : /* Avoid a duplicate warning from check_global_declaration. */
6160 83 : suppress_warning (decl, OPT_Wunused);
6161 : }
6162 :
6163 : /* So must decls that use a type with no linkage. */
6164 623995 : FOR_EACH_VEC_SAFE_ELT (no_linkage_decls, i, decl)
6165 523515 : no_linkage_error (decl);
6166 :
6167 100480 : maybe_warn_sized_delete ();
6168 :
6169 : // Place the init fns in the right order. We need to do this now,
6170 : // so that any module init will go at the start.
6171 100480 : if (static_init_fini_fns[true])
6172 16715 : for (auto iter : *static_init_fini_fns[true])
6173 5581 : iter.second = nreverse (iter.second);
6174 :
6175 100480 : if (flag_openmp && static_init_fini_fns[2 + true])
6176 43 : for (auto iter : *static_init_fini_fns[2 + true])
6177 15 : iter.second = nreverse (iter.second);
6178 :
6179 : /* Now we've instantiated all templates. Now we can escalate the functions
6180 : we squirreled away earlier. */
6181 100480 : process_and_check_pending_immediate_escalating_fns ();
6182 :
6183 : /* Then, do the Objective-C stuff. This is where all the
6184 : Objective-C module stuff gets generated (symtab,
6185 : class/protocol/selector lists etc). This must be done after C++
6186 : templates, destructors etc. so that selectors used in C++
6187 : templates are properly allocated. */
6188 100480 : if (c_dialect_objc ())
6189 0 : objc_write_global_declarations ();
6190 :
6191 100480 : bool has_module_inits = module_determine_import_inits ();
6192 100480 : bool has_objc_init = c_dialect_objc () && objc_static_init_needed_p ();
6193 100480 : if (has_module_inits || has_objc_init)
6194 : {
6195 55 : input_location = locus_at_end_of_parsing;
6196 55 : tree body = start_partial_init_fini_fn (true, DEFAULT_INIT_PRIORITY,
6197 : ssdf_count++, false);
6198 : /* For Objective-C++, we may need to initialize metadata found
6199 : in this module. This must be done _before_ any other static
6200 : initializations. */
6201 55 : if (has_objc_init)
6202 0 : objc_generate_static_init_call (NULL_TREE);
6203 55 : if (has_module_inits)
6204 55 : module_add_import_initializers ();
6205 55 : input_location = locus_at_end_of_parsing;
6206 55 : finish_partial_init_fini_fn (body);
6207 : }
6208 :
6209 100480 : if (module_global_init_needed ())
6210 : {
6211 : // Make sure there's a default priority entry.
6212 2007 : if (!static_init_fini_fns[true])
6213 1934 : static_init_fini_fns[true] = priority_map_t::create_ggc ();
6214 2007 : if (static_init_fini_fns[true]->get_or_insert (DEFAULT_INIT_PRIORITY))
6215 100480 : has_module_inits = true;
6216 :
6217 : /* FIXME: We need to work out what static constructors on OpenMP offload
6218 : target in modules will look like. */
6219 : }
6220 :
6221 : /* Generate initialization and destruction functions for all
6222 : priorities for which they are required. They have C-language
6223 : linkage. */
6224 100480 : push_lang_context (lang_name_c);
6225 502400 : for (unsigned initp = 4; initp--;)
6226 401920 : if (static_init_fini_fns[initp])
6227 : {
6228 15149 : for (auto iter : *static_init_fini_fns[initp])
6229 7582 : generate_ctor_or_dtor_function (initp & 1, iter.first, iter.second,
6230 : locus_at_end_of_parsing,
6231 7582 : (initp & 2) != 0);
6232 7567 : static_init_fini_fns[initp] = nullptr;
6233 : }
6234 100480 : pop_lang_context ();
6235 :
6236 100480 : fini_modules (parse_in, module_cookie, has_module_inits);
6237 :
6238 : /* Generate any missing aliases. */
6239 100480 : maybe_apply_pending_pragma_weaks ();
6240 :
6241 100480 : if (flag_vtable_verify)
6242 : {
6243 9 : vtv_recover_class_info ();
6244 9 : vtv_compute_class_hierarchy_transitive_closure ();
6245 9 : vtv_build_vtable_verify_fndecl ();
6246 : }
6247 :
6248 100480 : perform_deferred_noexcept_checks ();
6249 :
6250 100480 : fini_constexpr ();
6251 100480 : cp_tree_c_finish_parsing ();
6252 100480 : clear_consteval_vfns (consteval_vtables);
6253 :
6254 : /* The entire file is now complete. If requested, dump everything
6255 : to a file. */
6256 100480 : dump_tu ();
6257 :
6258 100480 : if (flag_detailed_statistics)
6259 : {
6260 0 : dump_tree_statistics ();
6261 0 : dump_time_statistics ();
6262 : }
6263 :
6264 100480 : timevar_stop (TV_PHASE_DEFERRED);
6265 100480 : timevar_start (TV_PHASE_PARSING);
6266 :
6267 : /* Indicate that we're done with front end processing. */
6268 100480 : at_eof = 3;
6269 100480 : }
6270 :
6271 : /* Perform any post compilation-proper cleanups for the C++ front-end.
6272 : This should really go away. No front-end should need to do
6273 : anything past the compilation process. */
6274 :
6275 : void
6276 100235 : cxx_post_compilation_parsing_cleanups (void)
6277 : {
6278 100235 : timevar_start (TV_PHASE_LATE_PARSING_CLEANUPS);
6279 :
6280 100235 : if (flag_vtable_verify)
6281 : {
6282 : /* Generate the special constructor initialization function that
6283 : calls __VLTRegisterPairs, and give it a very high
6284 : initialization priority. This must be done after
6285 : finalize_compilation_unit so that we have accurate
6286 : information about which vtable will actually be emitted. */
6287 9 : vtv_generate_init_routine ();
6288 : }
6289 :
6290 100235 : input_location = locus_at_end_of_parsing;
6291 :
6292 100235 : if (flag_checking)
6293 100226 : validate_conversion_obstack ();
6294 :
6295 100235 : timevar_stop (TV_PHASE_LATE_PARSING_CLEANUPS);
6296 100235 : }
6297 :
6298 : /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
6299 : function to call in parse-tree form; it has not yet been
6300 : semantically analyzed. ARGS are the arguments to the function.
6301 : They have already been semantically analyzed. This may change
6302 : ARGS. */
6303 :
6304 : tree
6305 371538 : build_offset_ref_call_from_tree (tree fn, vec<tree, va_gc> **args,
6306 : tsubst_flags_t complain)
6307 : {
6308 371538 : tree orig_fn;
6309 371538 : vec<tree, va_gc> *orig_args = NULL;
6310 371538 : tree expr;
6311 371538 : tree object;
6312 :
6313 371538 : orig_fn = fn;
6314 371538 : object = TREE_OPERAND (fn, 0);
6315 :
6316 371538 : if (processing_template_decl)
6317 : {
6318 285357 : gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
6319 : || TREE_CODE (fn) == MEMBER_REF);
6320 285357 : if (type_dependent_expression_p (fn)
6321 285357 : || any_type_dependent_arguments_p (*args))
6322 285318 : return build_min_nt_call_vec (fn, *args);
6323 :
6324 39 : orig_args = make_tree_vector_copy (*args);
6325 :
6326 : /* Transform the arguments and add the implicit "this"
6327 : parameter. */
6328 39 : if (TREE_CODE (TREE_TYPE (fn)) == METHOD_TYPE)
6329 : {
6330 33 : if (TREE_CODE (fn) == DOTSTAR_EXPR)
6331 27 : object = cp_build_addr_expr (object, complain);
6332 33 : vec_safe_insert (*args, 0, object);
6333 : }
6334 : }
6335 :
6336 : /* A qualified name corresponding to a bound pointer-to-member is
6337 : represented as an OFFSET_REF:
6338 :
6339 : struct B { void g(); };
6340 : void (B::*p)();
6341 : void B::g() { (this->*p)(); } */
6342 86220 : if (TREE_CODE (fn) == OFFSET_REF)
6343 : {
6344 86181 : tree object_addr = cp_build_addr_expr (object, complain);
6345 86181 : fn = TREE_OPERAND (fn, 1);
6346 86181 : fn = get_member_function_from_ptrfunc (&object_addr, fn,
6347 : complain);
6348 86181 : vec_safe_insert (*args, 0, object_addr);
6349 : }
6350 :
6351 86220 : if (CLASS_TYPE_P (TREE_TYPE (fn)))
6352 3 : expr = build_op_call (fn, args, complain);
6353 : else
6354 86217 : expr = cp_build_function_call_vec (fn, args, complain);
6355 86220 : if (processing_template_decl && expr != error_mark_node)
6356 39 : expr = build_min_non_dep_call_vec (expr, orig_fn, orig_args);
6357 :
6358 86220 : if (orig_args != NULL)
6359 39 : release_tree_vector (orig_args);
6360 :
6361 : return expr;
6362 : }
6363 :
6364 :
6365 : void
6366 375178869 : check_default_args (tree x)
6367 : {
6368 375178869 : tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
6369 375178869 : bool saw_def = false;
6370 375178869 : bool noted_first_def = false;
6371 375178869 : int idx_of_first_default_arg = 0;
6372 375178869 : location_t loc_of_first_default_arg = UNKNOWN_LOCATION;
6373 375178869 : int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
6374 375178869 : tree fndecl = STRIP_TEMPLATE (x);
6375 375178869 : auto_diagnostic_group d;
6376 1023010152 : for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
6377 : {
6378 647831283 : if (TREE_PURPOSE (arg))
6379 : {
6380 11937573 : if (!saw_def)
6381 : {
6382 8953458 : saw_def = true;
6383 8953458 : idx_of_first_default_arg = i;
6384 8953458 : location_t loc = get_fndecl_argument_location (fndecl, i);
6385 8953458 : if (loc != DECL_SOURCE_LOCATION (x))
6386 8953420 : loc_of_first_default_arg = loc;
6387 : }
6388 : }
6389 635893710 : else if (saw_def && !PACK_EXPANSION_P (TREE_VALUE (arg)))
6390 : {
6391 147 : error_at (get_fndecl_argument_location (fndecl, i),
6392 : "default argument missing for parameter %P of %q#D", i, x);
6393 147 : if (loc_of_first_default_arg != UNKNOWN_LOCATION
6394 147 : && !noted_first_def)
6395 : {
6396 144 : inform (loc_of_first_default_arg,
6397 : "...following parameter %P which has a default argument",
6398 : idx_of_first_default_arg);
6399 144 : noted_first_def = true;
6400 : }
6401 147 : TREE_PURPOSE (arg) = error_mark_node;
6402 : }
6403 : }
6404 375178869 : }
6405 :
6406 : /* Return true if function DECL can be inlined. This is used to force
6407 : instantiation of methods that might be interesting for inlining. */
6408 : bool
6409 3 : possibly_inlined_p (tree decl)
6410 : {
6411 3 : gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
6412 3 : if (DECL_UNINLINABLE (decl))
6413 : return false;
6414 3 : if (!optimize)
6415 3 : return DECL_DECLARED_INLINE_P (decl);
6416 : /* When optimizing, we might inline everything when flatten
6417 : attribute or heuristics inlining for size or autoinlining
6418 : is used. */
6419 : return true;
6420 : }
6421 :
6422 : /* If DECL is a function or variable template specialization, instantiate
6423 : its definition now. */
6424 :
6425 : void
6426 176488236 : maybe_instantiate_decl (tree decl)
6427 : {
6428 729167 : if (VAR_OR_FUNCTION_DECL_P (decl)
6429 176488236 : && DECL_LANG_SPECIFIC (decl)
6430 133781257 : && DECL_TEMPLATE_INFO (decl)
6431 281216228 : && !uses_template_parms (DECL_TI_ARGS (decl)))
6432 : {
6433 : /* Instantiating a function will result in garbage collection. We
6434 : must treat this situation as if we were within the body of a
6435 : function so as to avoid collecting live data only referenced from
6436 : the stack (such as overload resolution candidates). */
6437 100143595 : ++function_depth;
6438 100143595 : instantiate_decl (decl, /*defer_ok=*/false,
6439 : /*expl_inst_class_mem_p=*/false);
6440 100140898 : --function_depth;
6441 : }
6442 176485539 : }
6443 :
6444 : /* Error if the DECL is unavailable (unless this is currently suppressed).
6445 : Maybe warn if DECL is deprecated, subject to COMPLAIN. Returns true if
6446 : an error or warning was emitted. */
6447 :
6448 : bool
6449 4211630549 : cp_handle_deprecated_or_unavailable (tree decl, tsubst_flags_t complain)
6450 : {
6451 4211630549 : if (!decl)
6452 : return false;
6453 :
6454 4171846481 : if ((complain & tf_error)
6455 3802767018 : && deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
6456 : {
6457 3064157306 : if (TREE_UNAVAILABLE (decl))
6458 : {
6459 252 : error_unavailable_use (decl, NULL_TREE);
6460 252 : return true;
6461 : }
6462 : else
6463 : {
6464 : /* Perhaps this is an unavailable typedef. */
6465 3064157054 : if (TYPE_P (decl)
6466 814837372 : && TYPE_NAME (decl)
6467 3872524359 : && TREE_UNAVAILABLE (TYPE_NAME (decl)))
6468 : {
6469 6 : decl = TYPE_NAME (decl);
6470 : /* Don't error within members of a unavailable type. */
6471 6 : if (TYPE_P (decl)
6472 6 : && currently_open_class (decl))
6473 : return false;
6474 :
6475 6 : error_unavailable_use (decl, NULL_TREE);
6476 6 : return true;
6477 : }
6478 : }
6479 : /* Carry on to consider deprecatedness. */
6480 : }
6481 :
6482 4171846223 : if (!(complain & tf_warning)
6483 3758130336 : || deprecated_state == DEPRECATED_SUPPRESS
6484 3755669845 : || deprecated_state == UNAVAILABLE_DEPRECATED_SUPPRESS)
6485 : return false;
6486 :
6487 3022596892 : if (!TREE_DEPRECATED (decl))
6488 : {
6489 : /* Perhaps this is a deprecated typedef. */
6490 3021929385 : if (TYPE_P (decl) && TYPE_NAME (decl))
6491 806937844 : decl = TYPE_NAME (decl);
6492 :
6493 3021929385 : if (!TREE_DEPRECATED (decl))
6494 : return false;
6495 : }
6496 :
6497 : /* Don't warn within members of a deprecated type. */
6498 667515 : if (TYPE_P (decl)
6499 667515 : && currently_open_class (decl))
6500 : return false;
6501 :
6502 178355 : bool warned = false;
6503 178355 : if (cxx_dialect >= cxx11
6504 178264 : && DECL_P (decl)
6505 178143 : && DECL_ARTIFICIAL (decl)
6506 20245 : && DECL_IOBJ_MEMBER_FUNCTION_P (decl)
6507 198600 : && copy_fn_p (decl))
6508 : {
6509 : /* Don't warn if the flag was disabled around the class definition
6510 : (c++/94492). */
6511 20233 : if (warning_enabled_at (DECL_SOURCE_LOCATION (decl),
6512 20233 : OPT_Wdeprecated_copy))
6513 : {
6514 20 : auto_diagnostic_group d;
6515 20 : tree ctx = DECL_CONTEXT (decl);
6516 20 : tree other = classtype_has_depr_implicit_copy (ctx);
6517 20 : int opt = (DECL_DESTRUCTOR_P (other)
6518 20 : ? OPT_Wdeprecated_copy_dtor
6519 0 : : OPT_Wdeprecated_copy);
6520 20 : warned = warning (opt, "implicitly-declared %qD is deprecated",
6521 : decl);
6522 20 : if (warned)
6523 4 : inform (DECL_SOURCE_LOCATION (other),
6524 : "because %qT has user-provided %qD",
6525 : ctx, other);
6526 20 : }
6527 : }
6528 : else
6529 : {
6530 158122 : if (!warning_suppressed_at (input_location,
6531 : OPT_Wdeprecated_declarations))
6532 151447 : warned = warn_deprecated_use (decl, NULL_TREE);
6533 158122 : suppress_warning_at (input_location, OPT_Wdeprecated_declarations);
6534 : }
6535 :
6536 : return warned;
6537 : }
6538 :
6539 : /* Like above, but takes into account outer scopes. */
6540 :
6541 : void
6542 1559739398 : cp_warn_deprecated_use_scopes (tree scope)
6543 : {
6544 1559739398 : while (scope
6545 2739267756 : && scope != error_mark_node
6546 5478535477 : && scope != global_namespace)
6547 : {
6548 263053549 : if ((TREE_CODE (scope) == NAMESPACE_DECL || OVERLOAD_TYPE_P (scope))
6549 1425570274 : && cp_handle_deprecated_or_unavailable (scope))
6550 : return;
6551 1179528358 : if (TYPE_P (scope))
6552 247830989 : scope = CP_TYPE_CONTEXT (scope);
6553 : else
6554 931697369 : scope = CP_DECL_CONTEXT (scope);
6555 : }
6556 : }
6557 :
6558 : /* True if DECL or its enclosing scope have unbound template parameters. */
6559 :
6560 : bool
6561 510993452 : decl_dependent_p (tree decl)
6562 : {
6563 510993452 : tree orig_decl = decl;
6564 1021347431 : if (DECL_FUNCTION_SCOPE_P (decl)
6565 231577135 : || TREE_CODE (decl) == CONST_DECL
6566 231577135 : || TREE_CODE (decl) == USING_DECL
6567 742570587 : || TREE_CODE (decl) == FIELD_DECL)
6568 279416317 : decl = CP_DECL_CONTEXT (decl);
6569 510993452 : if (tree tinfo = get_template_info (decl))
6570 440910765 : if (any_dependent_template_arguments_p (TI_ARGS (tinfo)))
6571 : return true;
6572 335582746 : if (LAMBDA_FUNCTION_P (decl)
6573 333999453 : && dependent_type_p (DECL_CONTEXT (decl)))
6574 : return true;
6575 : /* for-range-declaration of expansion statement as well as variable
6576 : declarations in the expansion statement body when the expansion statement
6577 : is not inside a template still need to be treated as dependent during
6578 : parsing. When the body is instantiated, in_expansion_stmt will be already
6579 : false. */
6580 332402121 : if (VAR_P (orig_decl) && in_expansion_stmt && decl == current_function_decl)
6581 : return true;
6582 : return false;
6583 : }
6584 :
6585 : /* [basic.def.odr] A function is named [and therefore odr-used] by an
6586 : expression or conversion if it is the selected member of an overload set in
6587 : an overload resolution performed as part of forming that expression or
6588 : conversion, unless it is a pure virtual function and either the expression
6589 : is not an id-expression naming the function with an explicitly qualified
6590 : name or the expression forms a pointer to member.
6591 :
6592 : Mostly, we call mark_used in places that actually do something with a
6593 : function, like build_over_call. But in a few places we end up with a
6594 : non-overloaded FUNCTION_DECL that we aren't going to do any more with, like
6595 : convert_to_void. resolve_nondeduced_context is called in those places,
6596 : but it's also called in too many other places. */
6597 :
6598 : bool
6599 473811496 : mark_single_function (tree expr, tsubst_flags_t complain)
6600 : {
6601 473811496 : expr = maybe_undo_parenthesized_ref (expr);
6602 473811496 : expr = tree_strip_any_location_wrapper (expr);
6603 :
6604 473811496 : if (expr == error_mark_node)
6605 : return false;
6606 :
6607 473810681 : if (is_overloaded_fn (expr) == 1
6608 128162856 : && !mark_used (expr, complain)
6609 473810716 : && !(complain & tf_error))
6610 : return false;
6611 : return true;
6612 : }
6613 :
6614 : /* True iff we have started, but not finished, defining FUNCTION_DECL DECL. */
6615 :
6616 : bool
6617 98966708 : fn_being_defined (tree decl)
6618 : {
6619 : /* DECL_INITIAL is set to error_mark_node in grokfndecl for a definition, and
6620 : changed to BLOCK by poplevel at the end of the function. */
6621 98966708 : return (TREE_CODE (decl) == FUNCTION_DECL
6622 98966708 : && DECL_INITIAL (decl) == error_mark_node);
6623 : }
6624 :
6625 : /* True if DECL is an instantiation of a function template currently being
6626 : defined. */
6627 :
6628 : bool
6629 332401589 : fn_template_being_defined (tree decl)
6630 : {
6631 332401589 : if (TREE_CODE (decl) != FUNCTION_DECL
6632 162350325 : || !DECL_LANG_SPECIFIC (decl)
6633 162350325 : || !DECL_TEMPLOID_INSTANTIATION (decl)
6634 468006028 : || DECL_TEMPLATE_INSTANTIATED (decl))
6635 : return false;
6636 98966708 : tree tinfo = DECL_TEMPLATE_INFO (decl);
6637 98966708 : tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
6638 98966708 : return fn_being_defined (pattern);
6639 : }
6640 :
6641 : /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
6642 : If DECL is a specialization or implicitly declared class member,
6643 : generate the actual definition. Return false if something goes
6644 : wrong, true otherwise. */
6645 :
6646 : bool
6647 1403858450 : mark_used (tree decl, tsubst_flags_t complain /* = tf_warning_or_error */)
6648 : {
6649 1403858450 : if (decl == error_mark_node)
6650 : return false;
6651 :
6652 : /* If we're just testing conversions or resolving overloads, we
6653 : don't want any permanent effects like forcing functions to be
6654 : output or instantiating templates. */
6655 1403858300 : if ((complain & tf_conv))
6656 : return true;
6657 :
6658 : /* If DECL is a BASELINK for a single function, then treat it just
6659 : like the DECL for the function. Otherwise, if the BASELINK is
6660 : for an overloaded function, we don't know which function was
6661 : actually used until after overload resolution. */
6662 1403836912 : if (BASELINK_P (decl))
6663 : {
6664 12277 : tree fns = BASELINK_FUNCTIONS (decl);
6665 12277 : if (really_overloaded_fn (fns))
6666 : return true;
6667 12175 : fns = OVL_FIRST (fns);
6668 12175 : if (!mark_used (fns, complain))
6669 : return false;
6670 : /* We might have deduced its return type. */
6671 12166 : TREE_TYPE (decl) = TREE_TYPE (fns);
6672 12166 : return true;
6673 : }
6674 :
6675 1403824635 : if (!DECL_P (decl))
6676 : return true;
6677 :
6678 : /* Set TREE_USED for the benefit of -Wunused. */
6679 1402822860 : TREE_USED (decl) = true;
6680 :
6681 : /* And for structured bindings also the underlying decl. */
6682 1402822860 : if (DECL_DECOMPOSITION_P (decl) && !DECL_DECOMP_IS_BASE (decl))
6683 989068 : TREE_USED (DECL_DECOMP_BASE (decl)) = true;
6684 :
6685 1402822860 : if (TREE_CODE (decl) == TEMPLATE_DECL)
6686 : return true;
6687 :
6688 1402810007 : if (DECL_CLONED_FUNCTION_P (decl))
6689 21313157 : TREE_USED (DECL_CLONED_FUNCTION (decl)) = 1;
6690 :
6691 : /* Mark enumeration types as used. */
6692 1402810007 : if (TREE_CODE (decl) == CONST_DECL)
6693 35012670 : used_types_insert (DECL_CONTEXT (decl));
6694 :
6695 1402810007 : if (TREE_CODE (decl) == FUNCTION_DECL)
6696 : {
6697 322585055 : if (DECL_MAYBE_DELETED (decl))
6698 : {
6699 35957 : ++function_depth;
6700 35957 : maybe_synthesize_method (decl);
6701 35957 : --function_depth;
6702 : }
6703 :
6704 322585055 : if (DECL_DELETED_FN (decl))
6705 : {
6706 2894 : if (DECL_ARTIFICIAL (decl)
6707 1937 : && DECL_CONV_FN_P (decl)
6708 2906 : && LAMBDA_TYPE_P (DECL_CONTEXT (decl)))
6709 : /* We mark a lambda conversion op as deleted if we can't
6710 : generate it properly; see maybe_add_lambda_conv_op. */
6711 6 : sorry ("converting lambda that uses %<...%> to function pointer");
6712 2888 : else if (complain & tf_error)
6713 : {
6714 2422 : auto_diagnostic_group d;
6715 2422 : if (DECL_INITIAL (decl)
6716 2422 : && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST)
6717 : {
6718 25 : escaped_string msg;
6719 25 : msg.escape (TREE_STRING_POINTER (DECL_INITIAL (decl)));
6720 25 : error ("use of deleted function %qD: %s",
6721 : decl, (const char *) msg);
6722 25 : }
6723 : else
6724 2397 : error ("use of deleted function %qD", decl);
6725 2422 : if (!maybe_explain_implicit_delete (decl))
6726 679 : inform (DECL_SOURCE_LOCATION (decl), "declared here");
6727 2422 : }
6728 2894 : return false;
6729 : }
6730 :
6731 322582161 : if (!maybe_instantiate_noexcept (decl, complain))
6732 : return false;
6733 : }
6734 :
6735 1402807026 : if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_LOCAL_DECL_P (decl))
6736 : {
6737 73506 : if (!DECL_LANG_SPECIFIC (decl))
6738 : /* An unresolved dependent local extern. */
6739 : return true;
6740 :
6741 73506 : DECL_ODR_USED (decl) = 1;
6742 73506 : auto alias = DECL_LOCAL_DECL_ALIAS (decl);
6743 73506 : if (!alias || alias == error_mark_node)
6744 : return true;
6745 :
6746 : /* Process the underlying decl. */
6747 73214 : decl = alias;
6748 73214 : TREE_USED (decl) = true;
6749 : }
6750 :
6751 1402806734 : cp_handle_deprecated_or_unavailable (decl, complain);
6752 :
6753 : /* We can only check DECL_ODR_USED on variables or functions with
6754 : DECL_LANG_SPECIFIC set, and these are also the only decls that we
6755 : might need special handling for. */
6756 814000201 : if (!VAR_OR_FUNCTION_DECL_P (decl)
6757 1725388786 : || DECL_THUNK_P (decl))
6758 : return true;
6759 :
6760 : /* We only want to do this processing once. We don't need to keep trying
6761 : to instantiate inline templates, because unit-at-a-time will make sure
6762 : we get them compiled before functions that want to inline them. */
6763 911380127 : if (DECL_LANG_SPECIFIC (decl) && DECL_ODR_USED (decl))
6764 : return true;
6765 :
6766 505164640 : if (flag_concepts && TREE_CODE (decl) == FUNCTION_DECL
6767 672856501 : && !constraints_satisfied_p (decl))
6768 : {
6769 15 : if (complain & tf_error)
6770 : {
6771 6 : auto_diagnostic_group d;
6772 6 : error ("use of function %qD with unsatisfied constraints",
6773 : decl);
6774 6 : location_t loc = DECL_SOURCE_LOCATION (decl);
6775 6 : inform (loc, "declared here");
6776 6 : diagnose_constraints (loc, decl, NULL_TREE);
6777 6 : }
6778 15 : return false;
6779 : }
6780 :
6781 : /* If DECL has a deduced return type, we need to instantiate it now to
6782 : find out its type. For OpenMP user defined reductions, we need them
6783 : instantiated for reduction clauses which inline them by hand directly.
6784 : OpenMP declared mappers are used implicitly so must be instantiated
6785 : before they can be detected. */
6786 510993452 : if (undeduced_auto_decl (decl)
6787 482105563 : || (VAR_P (decl)
6788 319616605 : && VAR_HAD_UNKNOWN_BOUND (decl))
6789 482085359 : || (TREE_CODE (decl) == FUNCTION_DECL
6790 162488958 : && DECL_OMP_DECLARE_REDUCTION_P (decl))
6791 993078545 : || (TREE_CODE (decl) == VAR_DECL
6792 319596401 : && DECL_LANG_SPECIFIC (decl)
6793 76670229 : && DECL_OMP_DECLARE_MAPPER_P (decl)))
6794 28908468 : maybe_instantiate_decl (decl);
6795 :
6796 510993452 : if (!decl_dependent_p (decl)
6797 : /* Don't require this yet for an instantiation of a function template
6798 : we're currently defining (c++/120555). */
6799 332401589 : && !fn_template_being_defined (decl)
6800 843271085 : && !require_deduced_type (decl, complain))
6801 : return false;
6802 :
6803 510990684 : if (DECL_LANG_SPECIFIC (decl) == NULL)
6804 : return true;
6805 :
6806 240646244 : if (processing_template_decl || in_template_context)
6807 : return true;
6808 :
6809 : /* Check this too in case we're within instantiate_non_dependent_expr. */
6810 184381611 : if (DECL_TEMPLATE_INFO (decl)
6811 184381611 : && uses_template_parms (DECL_TI_ARGS (decl)))
6812 : return true;
6813 :
6814 184381611 : if (builtin_pack_fn_p (decl))
6815 : {
6816 12 : if (complain & tf_error)
6817 6 : error ("use of built-in parameter pack %qD outside of a template",
6818 6 : DECL_NAME (decl));
6819 12 : return false;
6820 : }
6821 :
6822 : /* If we don't need a value, then we don't need to synthesize DECL. */
6823 184381599 : if (cp_unevaluated_operand || in_discarded_stmt)
6824 : return true;
6825 :
6826 49993521 : DECL_ODR_USED (decl) = 1;
6827 49993521 : if (DECL_CLONED_FUNCTION_P (decl))
6828 7497628 : DECL_ODR_USED (DECL_CLONED_FUNCTION (decl)) = 1;
6829 :
6830 : /* DR 757: A type without linkage shall not be used as the type of a
6831 : variable or function with linkage, unless
6832 : o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
6833 : o the variable or function is not used (3.2 [basic.def.odr]) or is
6834 : defined in the same translation unit. */
6835 49993521 : if (cxx_dialect > cxx98
6836 49788543 : && decl_linkage (decl) != lk_none
6837 46802811 : && !DECL_EXTERN_C_P (decl)
6838 42124898 : && !DECL_ARTIFICIAL (decl)
6839 40311137 : && !decl_defined_p (decl)
6840 80157614 : && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
6841 523613 : vec_safe_push (no_linkage_decls, decl);
6842 :
6843 49993521 : if (TREE_CODE (decl) == FUNCTION_DECL
6844 38928851 : && DECL_DECLARED_INLINE_P (decl)
6845 30025604 : && !DECL_INITIAL (decl)
6846 20158178 : && !DECL_ARTIFICIAL (decl)
6847 69559657 : && !DECL_PURE_VIRTUAL_P (decl))
6848 : /* Remember it, so we can check it was defined. */
6849 19563696 : note_vague_linkage_fn (decl);
6850 :
6851 : /* Is it a synthesized method that needs to be synthesized? */
6852 49993521 : if (TREE_CODE (decl) == FUNCTION_DECL
6853 38928851 : && DECL_DEFAULTED_FN (decl)
6854 : /* A function defaulted outside the class is synthesized either by
6855 : cp_finish_decl or instantiate_decl. */
6856 1413729 : && !DECL_DEFAULTED_OUTSIDE_CLASS_P (decl)
6857 51407016 : && ! DECL_INITIAL (decl))
6858 : {
6859 : /* Remember the current location for a function we will end up
6860 : synthesizing. Then we can inform the user where it was
6861 : required in the case of error. */
6862 1211023 : if (decl_remember_implicit_trigger_p (decl))
6863 536177 : DECL_SOURCE_LOCATION (decl) = input_location;
6864 :
6865 : /* Synthesizing an implicitly defined member function will result in
6866 : garbage collection. We must treat this situation as if we were
6867 : within the body of a function so as to avoid collecting live data
6868 : on the stack (such as overload resolution candidates).
6869 :
6870 : We could just let c_parse_final_cleanups handle synthesizing
6871 : this function by adding it to deferred_fns, but doing
6872 : it at the use site produces better error messages. */
6873 1211023 : ++function_depth;
6874 1211023 : synthesize_method (decl);
6875 1211023 : --function_depth;
6876 : /* If this is a synthesized method we don't need to
6877 : do the instantiation test below. */
6878 : }
6879 37717828 : else if (VAR_OR_FUNCTION_DECL_P (decl)
6880 48782498 : && DECL_TEMPLATE_INFO (decl)
6881 78361929 : && (!DECL_EXPLICIT_INSTANTIATION (decl)
6882 1186410 : || always_instantiate_p (decl)))
6883 : /* If this is a function or variable that is an instance of some
6884 : template, we now know that we will need to actually do the
6885 : instantiation. We check that DECL is not an explicit
6886 : instantiation because that is not checked in instantiate_decl.
6887 :
6888 : We put off instantiating functions in order to improve compile
6889 : times. Maintaining a stack of active functions is expensive,
6890 : and the inliner knows to instantiate any functions it might
6891 : need. Therefore, we always try to defer instantiation. */
6892 : {
6893 29521187 : ++function_depth;
6894 29521187 : instantiate_decl (decl, /*defer_ok=*/true,
6895 : /*expl_inst_class_mem_p=*/false);
6896 29513087 : --function_depth;
6897 : }
6898 :
6899 : return true;
6900 : }
6901 :
6902 : tree
6903 9 : vtv_start_verification_constructor_init_function (void)
6904 : {
6905 9 : return start_objects (/*initp=*/true, MAX_RESERVED_INIT_PRIORITY - 1, true);
6906 : }
6907 :
6908 : tree
6909 6 : vtv_finish_verification_constructor_init_function (tree body)
6910 : {
6911 6 : return finish_objects (/*initp=*/true, MAX_RESERVED_INIT_PRIORITY - 1, body);
6912 : }
6913 :
6914 : #include "gt-cp-decl2.h"
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