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 638519628 : static hashval_t hash (const value_type decl)
106 : {
107 638519628 : return IDENTIFIER_HASH_VALUE (DECL_ASSEMBLER_NAME_RAW (decl));
108 : }
109 618452799 : static bool equal (const value_type existing, compare_type candidate)
110 : {
111 618452799 : tree name = DECL_ASSEMBLER_NAME_RAW (existing);
112 618452799 : 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 813617134 : static bool is_deleted (value_type e)
120 : {
121 813617134 : 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 534921 : template <typename T> static bool is_empty (const T &entry)
153 : {
154 534921 : 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 108039268 : build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals,
197 : cp_ref_qualifier rqual)
198 : {
199 108039268 : if (fntype == error_mark_node || ctype == error_mark_node)
200 : return error_mark_node;
201 :
202 108039265 : gcc_assert (FUNC_OR_METHOD_TYPE_P (fntype));
203 :
204 108039265 : cp_cv_quals type_quals = quals & ~TYPE_QUAL_RESTRICT;
205 108039265 : ctype = cp_build_qualified_type (ctype, type_quals);
206 :
207 108039265 : tree newtype
208 108039265 : = build_method_type_directly (ctype, TREE_TYPE (fntype),
209 108039265 : (TREE_CODE (fntype) == METHOD_TYPE
210 60859 : ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
211 107978406 : : TYPE_ARG_TYPES (fntype)));
212 108039265 : if (tree attrs = TYPE_ATTRIBUTES (fntype))
213 71 : newtype = cp_build_type_attribute_variant (newtype, attrs);
214 324117795 : newtype = build_cp_fntype_variant (newtype, rqual,
215 108039265 : TYPE_RAISES_EXCEPTIONS (fntype),
216 108039265 : TYPE_HAS_LATE_RETURN_TYPE (fntype));
217 :
218 108039265 : 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 1078706 : change_return_type (tree new_ret, tree fntype)
226 : {
227 1078706 : if (new_ret == error_mark_node)
228 : return fntype;
229 :
230 1078706 : if (same_type_p (new_ret, TREE_TYPE (fntype)))
231 : return fntype;
232 :
233 1078703 : tree newtype;
234 1078703 : tree args = TYPE_ARG_TYPES (fntype);
235 :
236 1078703 : if (TREE_CODE (fntype) == FUNCTION_TYPE)
237 : {
238 953949 : newtype = build_function_type (new_ret, args,
239 317983 : TYPE_NO_NAMED_ARGS_STDARG_P (fntype));
240 317983 : newtype = apply_memfn_quals (newtype,
241 : type_memfn_quals (fntype));
242 : }
243 : else
244 760720 : newtype = build_method_type_directly
245 760720 : (class_of_this_parm (fntype), new_ret, TREE_CHAIN (args));
246 :
247 1078703 : if (tree attrs = TYPE_ATTRIBUTES (fntype))
248 92 : newtype = cp_build_type_attribute_variant (newtype, attrs);
249 1078703 : newtype = cxx_copy_lang_qualifiers (newtype, fntype);
250 :
251 1078703 : 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 577759487 : cp_build_parm_decl (tree fn, tree name, tree type)
259 : {
260 577759487 : tree parm = build_decl (input_location,
261 : PARM_DECL, name, type);
262 577759487 : 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 577759487 : if (!processing_template_decl)
267 199894502 : DECL_ARG_TYPE (parm) = type_passed_as (type);
268 :
269 577759487 : 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 250158923 : build_artificial_parm (tree fn, tree name, tree type)
277 : {
278 250158923 : tree parm = cp_build_parm_decl (fn, name, type);
279 250158923 : DECL_ARTIFICIAL (parm) = 1;
280 : /* All our artificial parms are implicitly `const'; they cannot be
281 : assigned to. */
282 250158923 : TREE_READONLY (parm) = 1;
283 250158923 : 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 85002956 : maybe_retrofit_in_chrg (tree fn)
298 : {
299 85002956 : tree basetype, arg_types, parms, parm, fntype;
300 :
301 : /* If we've already add the in-charge parameter don't do it again. */
302 85002956 : 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 85002956 : 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 54226073 : if (!CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
313 : return;
314 :
315 1179886 : arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
316 1179886 : basetype = TREE_TYPE (TREE_VALUE (arg_types));
317 1179886 : arg_types = TREE_CHAIN (arg_types);
318 :
319 1179886 : 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 1179886 : if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
324 : {
325 1179886 : 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 1179886 : DECL_CHAIN (parm) = parms;
329 1179886 : parms = parm;
330 :
331 : /* ...and then to TYPE_ARG_TYPES. */
332 1179886 : arg_types = hash_tree_chain (vtt_parm_type, arg_types);
333 :
334 1179886 : DECL_HAS_VTT_PARM_P (fn) = 1;
335 : }
336 :
337 : /* Then add the in-charge parm (before the VTT parm). */
338 1179886 : parm = build_artificial_parm (fn, in_charge_identifier, integer_type_node);
339 1179886 : DECL_CHAIN (parm) = parms;
340 1179886 : parms = parm;
341 1179886 : arg_types = hash_tree_chain (integer_type_node, arg_types);
342 :
343 : /* Insert our new parameter(s) into the list. */
344 1179886 : DECL_CHAIN (DECL_ARGUMENTS (fn)) = parms;
345 :
346 : /* And rebuild the function type. */
347 1179886 : fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
348 : arg_types);
349 1179886 : if (TYPE_ATTRIBUTES (TREE_TYPE (fn)))
350 3 : fntype = (cp_build_type_attribute_variant
351 3 : (fntype, TYPE_ATTRIBUTES (TREE_TYPE (fn))));
352 1179886 : fntype = cxx_copy_lang_qualifiers (fntype, TREE_TYPE (fn));
353 1179886 : TREE_TYPE (fn) = fntype;
354 :
355 : /* Now we've got the in-charge parameter. */
356 1179886 : 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 150808759 : grokclassfn (tree ctype, tree function, enum overload_flags flags)
381 : {
382 150808759 : 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 150808759 : SET_DECL_LANGUAGE (function, lang_cplusplus);
387 :
388 150808759 : 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 150808759 : DECL_CONTEXT (function) = ctype;
396 :
397 150808759 : if (flags == DTOR_FLAG)
398 11771390 : DECL_CXX_DESTRUCTOR_P (function) = 1;
399 :
400 289846128 : if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
401 57000857 : maybe_retrofit_in_chrg (function);
402 150808759 : }
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 12156665 : 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 12156665 : tree type;
414 12156665 : tree expr;
415 12156665 : tree orig_array_expr = array_expr;
416 12156665 : tree orig_index_exp = index_exp;
417 12147031 : vec<tree, va_gc> *orig_index_exp_list
418 12156665 : = index_exp_list ? *index_exp_list : NULL;
419 12156665 : tree overload = NULL_TREE;
420 :
421 12156665 : if (error_operand_p (array_expr) || error_operand_p (index_exp))
422 117 : return error_mark_node;
423 :
424 12156548 : if (processing_template_decl)
425 : {
426 10450334 : if (type_dependent_expression_p (array_expr)
427 10450367 : || (index_exp ? type_dependent_expression_p (index_exp)
428 33 : : any_type_dependent_arguments_p (*index_exp_list)))
429 : {
430 8626366 : if (index_exp == NULL)
431 10843 : index_exp = build_min_nt_call_vec (ovl_op_identifier (ARRAY_REF),
432 : *index_exp_list);
433 8626366 : return build_min_nt_loc (loc, ARRAY_REF, array_expr, index_exp,
434 8626366 : NULL_TREE, NULL_TREE);
435 : }
436 1823968 : if (!index_exp)
437 32 : orig_index_exp_list = make_tree_vector_copy (*index_exp_list);
438 : }
439 :
440 3530182 : type = TREE_TYPE (array_expr);
441 3530182 : gcc_assert (type);
442 3530182 : type = non_reference (type);
443 :
444 : /* If they have an `operator[]', use that. */
445 3530182 : if (MAYBE_CLASS_TYPE_P (type)
446 3308253 : || (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 221971 : if (index_exp)
452 221268 : 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 3308211 : tree p1, p2, i1, i2;
503 3308211 : 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 3308211 : if (TREE_CODE (type) == ARRAY_TYPE || VECTOR_TYPE_P (type))
510 : p1 = array_expr;
511 : else
512 2153613 : p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
513 :
514 3308211 : 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 3308198 : if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
554 : p2 = index_exp;
555 : else
556 3308162 : p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
557 :
558 3308198 : i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
559 : false);
560 3308198 : i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
561 : false);
562 :
563 3308198 : if ((p1 && i2) && (i1 && p2))
564 0 : error ("ambiguous conversion for array subscript");
565 :
566 3308198 : 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 3308167 : if (array_expr == error_mark_node || index_exp == error_mark_node)
579 0 : error ("ambiguous conversion for array subscript");
580 :
581 3308167 : if (TYPE_PTR_P (TREE_TYPE (array_expr)))
582 2153559 : array_expr = mark_rvalue_use (array_expr);
583 : else
584 1154608 : array_expr = mark_lvalue_use_nonread (array_expr);
585 3308167 : index_exp = mark_rvalue_use (index_exp);
586 3308167 : if (swapped
587 51 : && flag_strong_eval_order == 2
588 3308211 : && (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 3308149 : expr = build_array_ref (input_location, array_expr, index_exp);
592 : }
593 3530138 : if (processing_template_decl && expr != error_mark_node)
594 : {
595 1823968 : if (overload != NULL_TREE)
596 : {
597 182172 : 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 182143 : return build_min_non_dep_op_overload (ARRAY_REF, expr, overload,
606 : orig_array_expr,
607 182143 : orig_index_exp);
608 : }
609 :
610 1641796 : 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 1641796 : return build_min_non_dep (ARRAY_REF, expr, orig_array_expr,
619 1641796 : 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 4930 : grok_omp_array_section (location_t loc, tree array_expr, tree index,
629 : tree length)
630 : {
631 4930 : tree orig_array_expr = array_expr;
632 4930 : tree orig_index = index;
633 4930 : tree orig_length = length;
634 :
635 4930 : if (error_operand_p (array_expr)
636 4921 : || error_operand_p (index)
637 9851 : || error_operand_p (length))
638 9 : return error_mark_node;
639 :
640 4921 : if (processing_template_decl
641 4921 : && (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 3988 : index = fold_non_dependent_expr (index);
647 3988 : 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 3988 : tree expr = build_omp_array_section (loc, array_expr, index, length);
654 :
655 3988 : 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 591831 : delete_sanity (location_t loc, tree exp, tree size, bool doing_vec,
670 : int use_global_delete, tsubst_flags_t complain)
671 : {
672 591831 : tree t, type;
673 :
674 591831 : if (exp == error_mark_node)
675 : return exp;
676 :
677 591714 : if (processing_template_decl)
678 : {
679 459047 : t = build_min (DELETE_EXPR, void_type_node, exp, size);
680 459047 : DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
681 459047 : DELETE_EXPR_USE_VEC (t) = doing_vec;
682 459047 : TREE_SIDE_EFFECTS (t) = 1;
683 459047 : SET_EXPR_LOCATION (t, loc);
684 459047 : return t;
685 : }
686 :
687 132667 : 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 132667 : if (TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE
691 132667 : && (complain & tf_warning))
692 21 : warning_at (exp_loc, 0, "deleting array %q#E", exp);
693 :
694 132667 : t = build_expr_type_conversion (WANT_POINTER, exp, true);
695 :
696 132667 : 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 132646 : 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 132646 : 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 132640 : 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 132640 : if (integer_zerop (t))
730 3 : return build1_loc (loc, NOP_EXPR, void_type_node, t);
731 :
732 132637 : if (doing_vec)
733 21954 : return build_vec_delete (loc, t, /*maxindex=*/NULL_TREE,
734 : sfk_deleting_destructor,
735 21954 : use_global_delete, complain);
736 : else
737 110683 : return build_delete (loc, type, t, sfk_deleting_destructor,
738 : LOOKUP_NORMAL, use_global_delete,
739 110683 : 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 23605105 : check_member_template (tree tmpl)
747 : {
748 23605105 : tree decl;
749 :
750 23605105 : gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
751 23605105 : decl = DECL_TEMPLATE_RESULT (tmpl);
752 :
753 23605105 : if (TREE_CODE (decl) == FUNCTION_DECL
754 2497722 : || DECL_ALIAS_TEMPLATE_P (tmpl)
755 24778234 : || (TREE_CODE (decl) == TYPE_DECL
756 816559 : && 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 23761538 : gcc_assert (!current_function_decl || LAMBDA_FUNCTION_P (decl));
761 : /* The parser rejects any use of virtual in a function template. */
762 23248535 : 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 23248535 : DECL_IGNORED_P (tmpl) = 1;
768 : }
769 356570 : else if (variable_template_p (tmpl))
770 : /* OK */;
771 : else
772 0 : error ("template declaration of %q#D", decl);
773 23605105 : }
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 : : 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. */
905 139 : 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 9744086 : check_classfn (tree ctype, tree function, tree template_parms)
988 : {
989 9744086 : if (DECL_USE_TEMPLATE (function)
990 1248749 : && !(TREE_CODE (function) == TEMPLATE_DECL
991 1203 : && DECL_TEMPLATE_SPECIALIZATION (function))
992 10991632 : && 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 9335587 : if (TREE_CODE (function) == TEMPLATE_DECL)
1008 : {
1009 1221 : if (template_parms
1010 2424 : && !comp_template_parms (template_parms,
1011 1203 : 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 1221 : template_parms = DECL_TEMPLATE_PARMS (function);
1018 : }
1019 :
1020 : /* OK, is this a definition of a member template? */
1021 9335587 : bool is_template = (template_parms != NULL_TREE);
1022 :
1023 : /* [temp.mem]
1024 :
1025 : A destructor shall not be a member template. */
1026 18671174 : 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 9335581 : tree pushed_scope = push_scope (ctype);
1036 9335581 : tree matched = NULL_TREE;
1037 9335581 : tree fns = get_class_binding (ctype, DECL_NAME (function));
1038 9335581 : bool saw_template = false;
1039 :
1040 37559907 : for (ovl_iterator iter (fns); !matched && iter; ++iter)
1041 : {
1042 16713083 : tree fndecl = *iter;
1043 :
1044 16713083 : if (TREE_CODE (fndecl) == TEMPLATE_DECL)
1045 4201586 : saw_template = true;
1046 :
1047 : /* A member template definition only matches a member template
1048 : declaration. */
1049 16713083 : if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
1050 1796230 : continue;
1051 :
1052 14916853 : if (!DECL_DECLARES_FUNCTION_P (fndecl))
1053 307998 : continue;
1054 :
1055 14608855 : tree p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
1056 14608855 : 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 14608855 : if (DECL_STATIC_FUNCTION_P (fndecl)
1066 14608855 : && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
1067 183571 : p1 = TREE_CHAIN (p1);
1068 :
1069 : /* ref-qualifier or absence of same must match. */
1070 29217710 : if (type_memfn_rqual (TREE_TYPE (function))
1071 14608855 : != type_memfn_rqual (TREE_TYPE (fndecl)))
1072 86 : continue;
1073 :
1074 : // Include constraints in the match.
1075 14608769 : tree c1 = get_constraints (function);
1076 14608769 : 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 14608769 : if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
1082 : TREE_TYPE (TREE_TYPE (fndecl)))
1083 13835936 : && compparms (p1, p2)
1084 9335509 : && !disjoint_version_decls (function, fndecl)
1085 9335509 : && (!is_template
1086 2338744 : || comp_template_parms (template_parms,
1087 2338744 : DECL_TEMPLATE_PARMS (fndecl)))
1088 9335503 : && equivalent_constraints (c1, c2)
1089 9335452 : && (DECL_TEMPLATE_SPECIALIZATION (function)
1090 9335452 : == DECL_TEMPLATE_SPECIALIZATION (fndecl))
1091 23944221 : && (!DECL_TEMPLATE_SPECIALIZATION (function)
1092 818185 : || (DECL_TI_TEMPLATE (function) == DECL_TI_TEMPLATE (fndecl))))
1093 : matched = fndecl;
1094 : }
1095 :
1096 114 : if (!matched && !is_template && saw_template
1097 9335596 : && !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 9335581 : 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 9335581 : if (pushed_scope)
1140 8965873 : 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 51920384 : note_vague_linkage_fn (tree decl)
1151 : {
1152 51920384 : if (processing_template_decl)
1153 : return;
1154 :
1155 51920375 : DECL_DEFER_OUTPUT (decl) = 1;
1156 51920375 : vec_safe_push (deferred_fns, decl);
1157 : }
1158 :
1159 : /* As above, but for variables. */
1160 :
1161 : void
1162 13476882 : note_vague_linkage_variable (tree decl)
1163 : {
1164 13476882 : vec_safe_push (pending_statics, decl);
1165 13476882 : }
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 17771165 : finish_static_data_member_decl (tree decl,
1172 : tree init, bool init_const_expr_p,
1173 : tree asmspec_tree,
1174 : int flags)
1175 : {
1176 17771165 : 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 17771162 : 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 17771162 : if (! processing_template_decl)
1188 14718869 : vec_safe_push (pending_statics, decl);
1189 :
1190 17771162 : if (LOCAL_CLASS_P (current_class_type)
1191 : /* We already complained about the template definition. */
1192 17771162 : && !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 35952472 : for (tree t = current_class_type; TYPE_P (t);
1198 18153871 : t = CP_TYPE_CONTEXT (t))
1199 36307814 : 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 17771162 : 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 5886447 : DECL_IN_AGGR_P (decl) = 1;
1215 :
1216 17771162 : if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
1217 17771162 : && TYPE_DOMAIN (TREE_TYPE (decl)) == NULL_TREE)
1218 113717 : SET_VAR_HAD_UNKNOWN_BOUND (decl);
1219 :
1220 17771162 : 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 13077446 : tree type = TREE_TYPE (decl) = complete_type (TREE_TYPE (decl));
1226 13077446 : cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
1227 : }
1228 :
1229 17771162 : cp_finish_decl (decl, init, init_const_expr_p, asmspec_tree, flags);
1230 17771162 : 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 75521126 : 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 75521126 : tree value;
1245 75521126 : const char *asmspec = 0;
1246 75521126 : int flags;
1247 :
1248 75521126 : if (init
1249 13664378 : && TREE_CODE (init) == TREE_LIST
1250 0 : && TREE_VALUE (init) == error_mark_node
1251 75521126 : && TREE_CHAIN (init) == NULL_TREE)
1252 : init = NULL_TREE;
1253 :
1254 75521126 : int initialized;
1255 75521126 : if (init == ridpointers[(int)RID_DELETE]
1256 75521126 : || (init
1257 9871895 : && TREE_CODE (init) == STRING_CST
1258 373 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
1259 : initialized = SD_DELETED;
1260 71728270 : else if (init == ridpointers[(int)RID_DEFAULT])
1261 : initialized = SD_DEFAULTED;
1262 64634516 : else if (init)
1263 : initialized = SD_INITIALIZED;
1264 : else
1265 61856748 : initialized = SD_UNINITIALIZED;
1266 :
1267 75521126 : value = grokdeclarator (declarator, declspecs, FIELD, initialized, &attrlist);
1268 75521120 : if (! value || value == error_mark_node)
1269 : /* friend or constructor went bad. */
1270 340 : return error_mark_node;
1271 75520780 : if (TREE_TYPE (value) == error_mark_node)
1272 : return value;
1273 :
1274 75520621 : 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 75520621 : if (value == void_type_node)
1284 : return value;
1285 :
1286 75520621 : if (DECL_NAME (value)
1287 75520621 : && 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 75520618 : if (TREE_CODE (value) == TYPE_DECL)
1296 : {
1297 26657913 : DECL_NONLOCAL (value) = 1;
1298 26657913 : DECL_CONTEXT (value) = current_class_type;
1299 :
1300 26657913 : if (attrlist)
1301 : {
1302 24227 : 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 24227 : if (TYPE_DECL_FOR_LINKAGE_PURPOSES_P (value))
1307 12 : attrflags = ATTR_FLAG_TYPE_IN_PLACE;
1308 :
1309 24227 : cplus_decl_attributes (&value, attrlist, attrflags);
1310 : }
1311 :
1312 26657913 : if (decl_spec_seq_has_spec_p (declspecs, ds_typedef)
1313 26657913 : && TREE_TYPE (value) != error_mark_node
1314 53315826 : && TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (value))) != value)
1315 26657265 : 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 26657913 : if (processing_template_decl)
1321 22021893 : value = push_template_decl (value);
1322 :
1323 26657913 : record_locally_defined_typedef (value);
1324 26657913 : return value;
1325 : }
1326 :
1327 48862705 : int friendp = decl_spec_seq_has_spec_p (declspecs, ds_friend);
1328 :
1329 48862705 : 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 48862705 : if (asmspec_tree && asmspec_tree != error_mark_node)
1336 194 : asmspec = TREE_STRING_POINTER (asmspec_tree);
1337 :
1338 48862705 : if (init)
1339 : {
1340 13664315 : if (TREE_CODE (value) == FUNCTION_DECL)
1341 : {
1342 11272072 : if (init == ridpointers[(int)RID_DELETE]
1343 11272072 : || (TREE_CODE (init) == STRING_CST
1344 373 : && TREE_TYPE (init) == ridpointers[(int)RID_DELETE]))
1345 : {
1346 3792850 : DECL_DELETED_FN (value) = 1;
1347 3792850 : DECL_DECLARED_INLINE_P (value) = 1;
1348 3792850 : if (TREE_CODE (init) == STRING_CST)
1349 373 : DECL_INITIAL (value) = init;
1350 : }
1351 7479222 : else if (init == ridpointers[(int)RID_DEFAULT])
1352 : {
1353 7093751 : if (defaultable_fn_check (value))
1354 : {
1355 7093666 : DECL_DEFAULTED_FN (value) = 1;
1356 7093666 : DECL_INITIALIZED_IN_CLASS_P (value) = 1;
1357 7093666 : 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 7093666 : DECL_INITIAL (value) = NULL_TREE;
1361 : }
1362 : }
1363 385471 : else if (TREE_CODE (init) == DEFERRED_PARSE)
1364 0 : error ("invalid initializer for member function %qD", value);
1365 385471 : else if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
1366 : {
1367 385462 : if (integer_zerop (init))
1368 385423 : 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 2392243 : 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 48862705 : if ((TREE_CODE (value) == FUNCTION_DECL
1396 20951001 : || TREE_CODE (value) == TEMPLATE_DECL)
1397 48862762 : && DECL_CONTEXT (value) != current_class_type)
1398 : {
1399 2143571 : if (attrlist)
1400 0 : cplus_decl_attributes (&value, attrlist, 0);
1401 2143571 : return value;
1402 : }
1403 :
1404 : /* Need to set this before push_template_decl. */
1405 46719134 : if (VAR_P (value))
1406 728602 : DECL_CONTEXT (value) = current_class_type;
1407 :
1408 46719134 : if (processing_template_decl && VAR_OR_FUNCTION_DECL_P (value))
1409 : {
1410 16283797 : value = push_template_decl (value);
1411 16283797 : if (error_operand_p (value))
1412 7 : return error_mark_node;
1413 : }
1414 :
1415 46719127 : if (attrlist)
1416 916584 : cplus_decl_attributes (&value, attrlist, 0);
1417 :
1418 46719127 : if (init && DIRECT_LIST_INIT_P (init))
1419 : flags = LOOKUP_NORMAL;
1420 : else
1421 : flags = LOOKUP_IMPLICIT;
1422 :
1423 46719127 : switch (TREE_CODE (value))
1424 : {
1425 728598 : case VAR_DECL:
1426 728598 : finish_static_data_member_decl (value, init, init_const_expr_p,
1427 : asmspec_tree, flags);
1428 728598 : return value;
1429 :
1430 20222342 : case FIELD_DECL:
1431 20222342 : if (asmspec)
1432 6 : error ("%<asm%> specifiers are not permitted on non-static data members");
1433 20222342 : if (DECL_INITIAL (value) == error_mark_node)
1434 0 : init = error_mark_node;
1435 20222342 : cp_finish_decl (value, init, /*init_const_expr_p=*/false,
1436 : NULL_TREE, flags);
1437 20222342 : DECL_IN_AGGR_P (value) = 1;
1438 20222342 : return value;
1439 :
1440 25768187 : case FUNCTION_DECL:
1441 25768187 : if (asmspec)
1442 92 : set_user_assembler_name (value, asmspec);
1443 :
1444 25768187 : 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 25768187 : if (DECL_UNIQUE_FRIEND_P (value))
1451 0 : return void_type_node;
1452 :
1453 25768187 : DECL_IN_AGGR_P (value) = 1;
1454 25768187 : 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 13077453 : start_initialized_static_member (const cp_declarator *declarator,
1468 : cp_decl_specifier_seq *declspecs,
1469 : tree attrlist)
1470 : {
1471 13077453 : tree value = grokdeclarator (declarator, declspecs, FIELD, SD_INITIALIZED,
1472 13077453 : &attrlist);
1473 13077453 : if (!value || error_operand_p (value))
1474 3 : return error_mark_node;
1475 13077450 : 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 13077450 : 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 13077450 : 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 13077447 : gcc_checking_assert (VAR_P (value));
1503 :
1504 13077447 : DECL_CONTEXT (value) = current_class_type;
1505 13077447 : DECL_INITIALIZED_IN_CLASS_P (value) = true;
1506 :
1507 13077447 : if (processing_template_decl)
1508 : {
1509 2885674 : value = push_template_decl (value);
1510 2885674 : if (error_operand_p (value))
1511 0 : return error_mark_node;
1512 : }
1513 :
1514 13077447 : if (attrlist)
1515 142032 : cplus_decl_attributes (&value, attrlist, 0);
1516 :
1517 : /* When defining a template we need to register the TEMPLATE_DECL. */
1518 13077447 : tree maybe_template = value;
1519 13077447 : if (template_parm_scope_p ())
1520 : {
1521 401224 : if (!DECL_TEMPLATE_SPECIALIZATION (value))
1522 356459 : maybe_template = DECL_TI_TEMPLATE (value);
1523 : else
1524 : maybe_template = NULL_TREE;
1525 : }
1526 13032682 : if (maybe_template)
1527 13032682 : finish_member_declaration (maybe_template);
1528 :
1529 13077447 : 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 36990206 : is_static_data_member_initialized_in_class (tree decl)
1537 : {
1538 36990206 : if (!decl || decl == error_mark_node)
1539 : return false;
1540 :
1541 36989016 : tree inner = STRIP_TEMPLATE (decl);
1542 22235477 : return (inner
1543 36989016 : && VAR_P (inner)
1544 13598585 : && DECL_CLASS_SCOPE_P (inner)
1545 35827943 : && DECL_INITIALIZED_IN_CLASS_P (inner));
1546 : }
1547 :
1548 : /* Finish a declaration prepared with start_initialized_static_member. */
1549 :
1550 : void
1551 13077450 : finish_initialized_static_member (tree decl, tree init, tree asmspec)
1552 : {
1553 13077450 : if (decl == error_mark_node)
1554 : return;
1555 13077444 : gcc_checking_assert (is_static_data_member_initialized_in_class (decl));
1556 :
1557 13077444 : int flags;
1558 13077444 : if (init && DIRECT_LIST_INIT_P (init))
1559 : flags = LOOKUP_NORMAL;
1560 : else
1561 : flags = LOOKUP_IMPLICIT;
1562 13077444 : 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 626145 : grokbitfield (const cp_declarator *declarator,
1572 : cp_decl_specifier_seq *declspecs, tree width, tree init,
1573 : tree attrlist)
1574 : {
1575 626145 : tree value = grokdeclarator (declarator, declspecs, BITFIELD,
1576 626145 : init != NULL_TREE, &attrlist);
1577 :
1578 626145 : if (value == error_mark_node)
1579 : return NULL_TREE; /* friends went bad. */
1580 :
1581 626139 : tree type = TREE_TYPE (value);
1582 626139 : if (type == error_mark_node)
1583 : return value;
1584 :
1585 : /* Pass friendly classes back. */
1586 626092 : if (VOID_TYPE_P (value))
1587 0 : return void_type_node;
1588 :
1589 626092 : if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type)
1590 626092 : && (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 626059 : 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 626053 : 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 626050 : 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 626041 : 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 626041 : 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 626035 : 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 626035 : int flags = LOOKUP_IMPLICIT;
1644 626035 : if (init && DIRECT_LIST_INIT_P (init))
1645 : flags = LOOKUP_NORMAL;
1646 626035 : cp_finish_decl (value, init, false, NULL_TREE, flags);
1647 :
1648 626035 : if (width != error_mark_node)
1649 : {
1650 : /* The width must be an integer type. */
1651 626018 : if (!type_dependent_expression_p (width)
1652 626018 : && !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 625997 : 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 625991 : DECL_BIT_FIELD_REPRESENTATIVE (value) = width;
1661 625991 : SET_DECL_C_BIT_FIELD (value);
1662 : }
1663 : }
1664 :
1665 626035 : DECL_IN_AGGR_P (value) = 1;
1666 :
1667 626035 : if (attrlist)
1668 1212 : cplus_decl_attributes (&value, attrlist, /*flags=*/0);
1669 :
1670 626035 : 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 18080867 : is_late_template_attribute (tree attr, tree decl)
1679 : {
1680 18080867 : tree name = get_attribute_name (attr);
1681 18080867 : tree args = TREE_VALUE (attr);
1682 18080867 : const struct attribute_spec *spec
1683 18080867 : = lookup_attribute_spec (TREE_PURPOSE (attr));
1684 18080867 : 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 18080867 : if (annotation_p (attr))
1689 : return true;
1690 :
1691 18080787 : if (!spec)
1692 : /* Unknown attribute. */
1693 : return false;
1694 :
1695 : /* Attribute weak handling wants to write out assembly right away. */
1696 18080753 : 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 18080750 : if (TREE_CODE (decl) == TYPE_DECL
1703 18080750 : && (is_attribute_p ("unused", name)
1704 20150 : || is_attribute_p ("used", name)
1705 20144 : || (is_attribute_p ("maybe_unused", name)
1706 10 : && get_attribute_namespace (attr) == NULL_TREE)))
1707 : return false;
1708 :
1709 : /* Attribute tls_model wants to modify the symtab. */
1710 18080506 : if (is_attribute_p ("tls_model", name))
1711 : return true;
1712 :
1713 : /* #pragma omp declare simd attribute needs to be always deferred. */
1714 18080503 : if (flag_openmp
1715 18080503 : && is_attribute_p ("omp declare simd", name))
1716 : return true;
1717 :
1718 18079611 : if (args == error_mark_node)
1719 : return false;
1720 :
1721 : /* An attribute pack is clearly dependent. */
1722 18079611 : 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 19037766 : for (arg = args; arg; arg = TREE_CHAIN (arg))
1728 : {
1729 1094172 : 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 1132854 : if (arg == args
1736 1052528 : && get_attribute_namespace (attr) == gnu_identifier
1737 887792 : && attribute_takes_identifier_p (name)
1738 1094172 : && identifier_p (t))
1739 38682 : continue;
1740 :
1741 1055490 : if (value_dependent_expression_p (t))
1742 : return true;
1743 : }
1744 :
1745 17943594 : if (TREE_CODE (decl) == TYPE_DECL
1746 17926086 : || TYPE_P (decl)
1747 17461655 : || spec->type_required)
1748 : {
1749 902697 : tree type = TYPE_P (decl) ? decl : TREE_TYPE (decl);
1750 :
1751 438266 : if (!type)
1752 : return true;
1753 :
1754 : /* Some attributes specifically apply to templates. */
1755 902694 : if (is_attribute_p ("abi_tag", name)
1756 902670 : || is_attribute_p ("deprecated", name)
1757 510344 : || is_attribute_p ("unavailable", name)
1758 510338 : || is_attribute_p ("visibility", name)
1759 1413020 : || 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 436377 : 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 249997151 : splice_template_attributes (tree *attr_p, tree decl)
1779 : {
1780 249997151 : tree *p = attr_p;
1781 249997151 : tree late_attrs = NULL_TREE;
1782 249997151 : tree *q = &late_attrs;
1783 :
1784 249997151 : if (!p || *p == error_mark_node)
1785 : return NULL_TREE;
1786 :
1787 268078018 : for (; *p; )
1788 : {
1789 18080867 : if (is_late_template_attribute (*p, decl))
1790 : {
1791 519006 : ATTR_IS_DEPENDENT (*p) = 1;
1792 519006 : *q = *p;
1793 519006 : *p = TREE_CHAIN (*p);
1794 519006 : q = &TREE_CHAIN (*q);
1795 519006 : *q = NULL_TREE;
1796 : }
1797 : else
1798 17561861 : p = &TREE_CHAIN (*p);
1799 : }
1800 :
1801 249997151 : 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 516926 : save_template_attributes (tree late_attrs, tree *decl_p, int flags)
1809 : {
1810 516926 : tree *q;
1811 :
1812 516926 : if (!late_attrs)
1813 : return;
1814 :
1815 516926 : if (DECL_P (*decl_p))
1816 504161 : q = &DECL_ATTRIBUTES (*decl_p);
1817 : else
1818 12765 : q = &TYPE_ATTRIBUTES (*decl_p);
1819 :
1820 516926 : tree old_attrs = *q;
1821 :
1822 : /* Place the late attributes at the beginning of the attribute
1823 : list. */
1824 516926 : late_attrs = chainon (late_attrs, *q);
1825 516926 : if (*q != late_attrs
1826 516926 : && !DECL_P (*decl_p)
1827 12765 : && !(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 516874 : *q = late_attrs;
1839 :
1840 516926 : 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 12725 : tree variant;
1846 12865 : 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 2030721129 : any_dependent_type_attributes_p (tree attrs)
1860 : {
1861 2065353257 : for (tree a = attrs; a; a = TREE_CHAIN (a))
1862 34633355 : if (ATTR_IS_DEPENDENT (a))
1863 : {
1864 2060637 : const attribute_spec *as = lookup_attribute_spec (TREE_PURPOSE (a));
1865 2060637 : 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 414006 : attributes_naming_typedef_ok (tree attrs)
1877 : {
1878 426156 : for (; attrs; attrs = TREE_CHAIN (attrs))
1879 : {
1880 12153 : tree name = get_attribute_name (attrs);
1881 12153 : 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 31515 : cp_reconstruct_complex_type (tree type, tree bottom)
1891 : {
1892 31515 : tree inner, outer;
1893 :
1894 31515 : 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 400939115 : cp_check_const_attributes (tree attributes)
1954 : {
1955 400939115 : if (attributes == error_mark_node)
1956 : return;
1957 :
1958 : tree attr;
1959 442323636 : for (attr = attributes; attr; attr = TREE_CHAIN (attr))
1960 : {
1961 : /* Annotation arguments are handled in handle_annotation_attribute. */
1962 41384521 : if (annotation_p (attr))
1963 758 : continue;
1964 :
1965 41383763 : 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 41383763 : bool manifestly_const_eval
1970 41383763 : = is_attribute_p ("aligned", get_attribute_name (attr));
1971 53814831 : for (arg = TREE_VALUE (attr); arg && TREE_CODE (arg) == TREE_LIST;
1972 12431068 : arg = TREE_CHAIN (arg))
1973 : {
1974 12431068 : tree expr = TREE_VALUE (arg);
1975 12431068 : if (EXPR_P (expr))
1976 8862 : TREE_VALUE (arg)
1977 4431 : = 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 25759598 : maybe_propagate_warmth_attributes (tree fn, tree type)
1988 : {
1989 25759598 : if (fn == NULL_TREE || type == NULL_TREE
1990 25759598 : || !(TREE_CODE (type) == RECORD_TYPE
1991 : || TREE_CODE (type) == UNION_TYPE))
1992 : return;
1993 :
1994 25759598 : tree has_cold_attr = lookup_attribute ("cold", TYPE_ATTRIBUTES (type));
1995 25759598 : tree has_hot_attr = lookup_attribute ("hot", TYPE_ATTRIBUTES (type));
1996 :
1997 25759598 : 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 400870318 : find_last_decl (tree decl)
2032 : {
2033 400870318 : tree last_decl = NULL_TREE;
2034 :
2035 400870318 : if (tree name = DECL_P (decl) ? DECL_NAME (decl) : NULL_TREE)
2036 : {
2037 : /* Template specializations are matched elsewhere. */
2038 333975661 : if (DECL_LANG_SPECIFIC (decl)
2039 333975661 : && DECL_USE_TEMPLATE (decl))
2040 : return NULL_TREE;
2041 :
2042 : /* Look up the declaration in its scope. */
2043 328814324 : tree pushed_scope = NULL_TREE;
2044 328814324 : if (tree ctype = DECL_CONTEXT (decl))
2045 252280732 : pushed_scope = push_scope (ctype);
2046 :
2047 328814324 : last_decl = lookup_name (name);
2048 :
2049 328814324 : if (pushed_scope)
2050 142316584 : 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 328814324 : if (last_decl && BASELINK_P (last_decl))
2055 186898 : last_decl = BASELINK_FUNCTIONS (last_decl);
2056 : }
2057 :
2058 66833272 : if (!last_decl)
2059 : return NULL_TREE;
2060 :
2061 102046710 : if (DECL_P (last_decl) || TREE_CODE (last_decl) == OVERLOAD)
2062 : {
2063 : /* A set of overloads of the same function. */
2064 578981199 : for (lkp_iterator iter (last_decl); iter; ++iter)
2065 : {
2066 487651952 : if (TREE_CODE (*iter) == OVERLOAD)
2067 0 : continue;
2068 :
2069 487651952 : tree d = *iter;
2070 :
2071 : /* We can't compare versions in the middle of processing the
2072 : attribute that has the version. */
2073 487651952 : if (TREE_CODE (d) == FUNCTION_DECL
2074 487651952 : && DECL_FUNCTION_VERSIONED (d))
2075 10698184 : return NULL_TREE;
2076 :
2077 487650815 : if (decls_match (decl, d, /*record_decls=*/false))
2078 : return d;
2079 : }
2080 91329247 : return NULL_TREE;
2081 : }
2082 :
2083 : return NULL_TREE;
2084 : }
2085 :
2086 : /* Like decl_attributes, but handle C++ complexity. */
2087 :
2088 : void
2089 400937132 : cplus_decl_attributes (tree *decl, tree attributes, int flags)
2090 : {
2091 400937132 : if (*decl == NULL_TREE || *decl == void_type_node
2092 400937132 : || *decl == error_mark_node || attributes == error_mark_node)
2093 : return;
2094 :
2095 : /* Add implicit "omp declare target" attribute if requested. */
2096 400937047 : if (vec_safe_length (scope_chain->omp_declare_target_attribute)
2097 10875 : && ((VAR_P (*decl)
2098 2159 : && (TREE_STATIC (*decl) || DECL_EXTERNAL (*decl)))
2099 3372 : || TREE_CODE (*decl) == FUNCTION_DECL))
2100 : {
2101 1696 : if (VAR_P (*decl)
2102 1696 : && DECL_CLASS_SCOPE_P (*decl))
2103 0 : error ("%q+D static data member inside of declare target directive",
2104 : *decl);
2105 : else
2106 : {
2107 1696 : if (VAR_P (*decl)
2108 1696 : && (processing_template_decl
2109 285 : || !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 1644 : attributes = tree_cons (get_identifier ("omp declare target"),
2115 : NULL_TREE, attributes);
2116 1696 : 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 400937047 : tree late_attrs = NULL_TREE;
2144 400937047 : if (processing_template_decl)
2145 : {
2146 249983412 : if (check_for_bare_parameter_packs (attributes))
2147 : return;
2148 249983403 : late_attrs = splice_template_attributes (&attributes, *decl);
2149 : }
2150 :
2151 400937038 : cp_check_const_attributes (attributes);
2152 :
2153 400937038 : if (flag_openmp || flag_openmp_simd)
2154 : {
2155 : bool diagnosed = false;
2156 1373268 : for (tree *pa = &attributes; *pa; )
2157 : {
2158 188238 : 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 188169 : pa = &TREE_CHAIN (*pa);
2193 : }
2194 : }
2195 :
2196 400937038 : if (TREE_CODE (*decl) == TEMPLATE_DECL)
2197 1203 : decl = &DECL_TEMPLATE_RESULT (*decl);
2198 :
2199 400937038 : if (TREE_TYPE (*decl) && TYPE_PTRMEMFUNC_P (TREE_TYPE (*decl)))
2200 : {
2201 66720 : attributes
2202 66720 : = decl_attributes (decl, attributes, flags | ATTR_FLAG_FUNCTION_NEXT);
2203 66720 : decl_attributes (&TYPE_PTRMEMFUNC_FN_TYPE_RAW (TREE_TYPE (*decl)),
2204 : attributes, flags);
2205 : }
2206 : else
2207 : {
2208 400870318 : tree last_decl = find_last_decl (*decl);
2209 400870318 : decl_attributes (decl, attributes, flags, last_decl);
2210 : }
2211 :
2212 400937038 : if (late_attrs)
2213 516926 : save_template_attributes (late_attrs, decl, flags);
2214 :
2215 : /* Propagate deprecation out to the template. */
2216 400937038 : if (TREE_DEPRECATED (*decl))
2217 1750917 : if (tree ti = get_template_info (*decl))
2218 : {
2219 503990 : tree tmpl = TI_TEMPLATE (ti);
2220 503990 : tree pattern = (TYPE_P (*decl) ? TREE_TYPE (tmpl)
2221 503990 : : DECL_TEMPLATE_RESULT (tmpl));
2222 503990 : if (*decl == pattern)
2223 459950 : TREE_DEPRECATED (tmpl) = true;
2224 : }
2225 :
2226 : /* Likewise, propagate unavailability out to the template. */
2227 400937038 : 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 400937038 : if (VAR_P (*decl) && CP_DECL_THREAD_LOCAL_P (*decl))
2238 : {
2239 : // tls_model attribute can set a stronger TLS access model.
2240 20247 : tls_model model = DECL_TLS_MODEL (*decl);
2241 : // Don't upgrade TLS model if TLS model isn't set yet.
2242 20247 : if (model != TLS_MODEL_NONE)
2243 : {
2244 20122 : tls_model default_model = decl_default_tls_model (*decl);
2245 20122 : if (default_model > model)
2246 19900 : 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 457 : build_anon_union_vars (tree type, tree object)
2264 : {
2265 457 : tree main_decl = NULL_TREE;
2266 457 : tree field;
2267 :
2268 : /* Rather than write the code to handle the non-union case,
2269 : just give an error. */
2270 457 : 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 451 : for (field = TYPE_FIELDS (type);
2278 1578 : field != NULL_TREE;
2279 1127 : field = DECL_CHAIN (field))
2280 : {
2281 1127 : tree decl;
2282 1127 : tree ref;
2283 :
2284 1127 : if (DECL_ARTIFICIAL (field))
2285 555 : continue;
2286 572 : 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 572 : if (TREE_PRIVATE (field))
2295 6 : permerror (DECL_SOURCE_LOCATION (field),
2296 : "private member %q#D in anonymous union", field);
2297 566 : else if (TREE_PROTECTED (field))
2298 0 : permerror (DECL_SOURCE_LOCATION (field),
2299 : "protected member %q#D in anonymous union", field);
2300 :
2301 572 : if (processing_template_decl)
2302 66 : ref = build_min_nt_loc (UNKNOWN_LOCATION, COMPONENT_REF, object,
2303 : field, NULL_TREE);
2304 : else
2305 506 : ref = build_class_member_access_expr (object, field, NULL_TREE,
2306 : false, tf_warning_or_error);
2307 :
2308 572 : if (DECL_NAME (field))
2309 : {
2310 531 : tree base;
2311 :
2312 531 : decl = build_decl (input_location,
2313 531 : VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
2314 531 : DECL_ANON_UNION_VAR_P (decl) = 1;
2315 531 : DECL_ARTIFICIAL (decl) = 1;
2316 :
2317 531 : base = get_base_address (object);
2318 531 : TREE_PUBLIC (decl) = TREE_PUBLIC (base);
2319 531 : TREE_STATIC (decl) = TREE_STATIC (base);
2320 531 : DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
2321 :
2322 531 : SET_DECL_VALUE_EXPR (decl, ref);
2323 531 : DECL_HAS_VALUE_EXPR_P (decl) = 1;
2324 :
2325 531 : 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 572 : if (main_decl == NULL_TREE)
2333 1127 : 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 425 : finish_anon_union (tree anon_union_decl)
2345 : {
2346 425 : tree type;
2347 425 : tree main_decl;
2348 425 : bool public_p;
2349 :
2350 425 : if (anon_union_decl == error_mark_node)
2351 : return;
2352 :
2353 416 : type = TREE_TYPE (anon_union_decl);
2354 416 : public_p = TREE_PUBLIC (anon_union_decl);
2355 :
2356 : /* The VAR_DECL's context is the same as the TYPE's context. */
2357 416 : DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
2358 :
2359 416 : if (TYPE_FIELDS (type) == NULL_TREE)
2360 : return;
2361 :
2362 416 : if (public_p)
2363 : {
2364 0 : error ("namespace-scope anonymous aggregates must be static");
2365 0 : return;
2366 : }
2367 :
2368 416 : main_decl = build_anon_union_vars (type, anon_union_decl);
2369 416 : if (main_decl == error_mark_node)
2370 : return;
2371 392 : if (main_decl == NULL_TREE)
2372 : {
2373 12 : pedwarn (input_location, 0, "anonymous union with no members");
2374 12 : return;
2375 : }
2376 :
2377 380 : if (!processing_template_decl)
2378 : {
2379 : /* Use main_decl to set the mangled name. */
2380 341 : DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
2381 341 : maybe_commonize_var (anon_union_decl);
2382 341 : 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 341 : DECL_NAME (anon_union_decl) = NULL_TREE;
2389 : }
2390 :
2391 380 : pushdecl (anon_union_decl);
2392 380 : 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 155452 : coerce_new_type (tree type, location_t loc)
2401 : {
2402 155452 : int e = 0;
2403 155452 : tree args = TYPE_ARG_TYPES (type);
2404 :
2405 155452 : gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
2406 :
2407 155452 : 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 155452 : if (args && args != void_list_node)
2415 : {
2416 155437 : 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 155437 : 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 155452 : 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 155452 : default:;
2452 : }
2453 155452 : return type;
2454 : }
2455 :
2456 : void
2457 207378 : coerce_delete_type (tree decl, location_t loc)
2458 : {
2459 207378 : int e = 0;
2460 207378 : tree type = TREE_TYPE (decl);
2461 207378 : tree args = TYPE_ARG_TYPES (type);
2462 :
2463 207378 : gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
2464 :
2465 207378 : 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 207378 : tree ptrtype = ptr_type_node;
2473 207378 : 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 207375 : if (!args || args == void_list_node
2493 414750 : || !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 207363 : 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 207378 : default:;
2512 : }
2513 :
2514 207378 : TREE_TYPE (decl) = type;
2515 207378 : }
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 380076 : mark_vtable_entries (tree decl, vec<tree> &consteval_vtables)
2522 : {
2523 : /* It's OK for the vtable to refer to deprecated virtual functions. */
2524 380076 : auto du = make_temp_override (deprecated_state,
2525 380076 : UNAVAILABLE_DEPRECATED_SUPPRESS);
2526 :
2527 380076 : bool consteval_seen = false;
2528 :
2529 5932215 : for (auto &e: CONSTRUCTOR_ELTS (DECL_INITIAL (decl)))
2530 : {
2531 4791987 : tree fnaddr = e.value;
2532 :
2533 4791987 : STRIP_NOPS (fnaddr);
2534 :
2535 7270342 : if (TREE_CODE (fnaddr) != ADDR_EXPR
2536 4791987 : && 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 2478355 : continue;
2540 :
2541 2313632 : tree fn = TREE_OPERAND (fnaddr, 0);
2542 4168799 : if (TREE_CODE (fn) == FUNCTION_DECL && DECL_IMMEDIATE_FUNCTION_P (fn))
2543 : {
2544 95 : if (!consteval_seen)
2545 : {
2546 50 : consteval_seen = true;
2547 50 : consteval_vtables.safe_push (decl);
2548 : }
2549 95 : continue;
2550 : }
2551 2313537 : 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 2313537 : if (DECL_THUNK_P (fn))
2557 4061 : 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 2313537 : input_location = DECL_SOURCE_LOCATION (fn);
2563 2313537 : mark_used (fn);
2564 : }
2565 380076 : }
2566 :
2567 : /* Replace any consteval functions in vtables with null pointers. */
2568 :
2569 : static void
2570 99773 : clear_consteval_vfns (vec<tree> &consteval_vtables)
2571 : {
2572 99885 : for (tree vtable : consteval_vtables)
2573 366 : for (constructor_elt &elt : CONSTRUCTOR_ELTS (DECL_INITIAL (vtable)))
2574 : {
2575 216 : tree fn = cp_get_fndecl_from_callee (elt.value, /*fold*/false);
2576 326 : if (fn && DECL_IMMEDIATE_FUNCTION_P (fn))
2577 95 : elt.value = build_zero_cst (vtable_entry_type);
2578 : }
2579 99773 : }
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 61447874 : adjust_var_decl_tls_model (tree decl)
2586 : {
2587 61447874 : if (CP_DECL_THREAD_LOCAL_P (decl)
2588 61447874 : && !lookup_attribute ("tls_model", DECL_ATTRIBUTES (decl)))
2589 297 : set_decl_tls_model (decl, decl_default_tls_model (decl));
2590 61447874 : }
2591 :
2592 : /* Set DECL up to have the closest approximation of "initialized common"
2593 : linkage available. */
2594 :
2595 : void
2596 113664686 : comdat_linkage (tree decl)
2597 : {
2598 113664686 : if (flag_weak)
2599 113664662 : 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 113664686 : if (TREE_PUBLIC (decl))
2641 113664662 : DECL_COMDAT (decl) = 1;
2642 :
2643 113664686 : if (VAR_P (decl))
2644 61447099 : adjust_var_decl_tls_model (decl);
2645 113664686 : }
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 752919 : 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 752919 : if (! flag_weak)
2663 : return;
2664 :
2665 752916 : gcc_checking_assert (!consteval_only_p (decl));
2666 :
2667 : /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
2668 : we can get away with not emitting them if they aren't used. We need
2669 : to for variables so that cp_finish_decl will update their linkage,
2670 : because their DECL_INITIAL may not have been set properly yet. */
2671 :
2672 752916 : if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
2673 : || (! DECL_EXPLICIT_INSTANTIATION (decl)
2674 : && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
2675 : {
2676 752916 : make_decl_one_only (decl, cxx_comdat_group (decl));
2677 :
2678 752916 : if (VAR_P (decl))
2679 : {
2680 775 : varpool_node *node = varpool_node::get_create (decl);
2681 775 : DECL_COMDAT (decl) = 1;
2682 : /* Mark it needed so we don't forget to emit it. */
2683 775 : node->forced_by_abi = true;
2684 775 : TREE_USED (decl) = 1;
2685 :
2686 775 : adjust_var_decl_tls_model (decl);
2687 : }
2688 : }
2689 : }
2690 :
2691 : /* Returns true iff DECL, a FUNCTION_DECL or VAR_DECL, has vague linkage.
2692 : This predicate will give the right answer during parsing of the
2693 : function, which other tests may not. */
2694 :
2695 : bool
2696 38473819 : vague_linkage_p (tree decl)
2697 : {
2698 38473822 : if (!TREE_PUBLIC (decl))
2699 : {
2700 : /* maybe_thunk_body clears TREE_PUBLIC and DECL_ABSTRACT_P on the
2701 : maybe-in-charge 'tor variants; in that case we need to check one of
2702 : the "clones" for the real linkage. But only in that case; before
2703 : maybe_clone_body we haven't yet copied the linkage to the clones. */
2704 9340 : if (DECL_MAYBE_IN_CHARGE_CDTOR_P (decl)
2705 327 : && !DECL_ABSTRACT_P (decl)
2706 3 : && DECL_CHAIN (decl)
2707 4827 : && DECL_CLONED_FUNCTION_P (DECL_CHAIN (decl)))
2708 3 : return vague_linkage_p (DECL_CHAIN (decl));
2709 :
2710 4821 : gcc_checking_assert (!DECL_COMDAT (decl));
2711 : return false;
2712 : }
2713 : /* Unfortunately, import_export_decl has not always been called
2714 : before the function is processed, so we cannot simply check
2715 : DECL_COMDAT. */
2716 38468998 : if (DECL_COMDAT (decl)
2717 976332 : || (TREE_CODE (decl) == FUNCTION_DECL
2718 963800 : && DECL_NONGNU_INLINE_P (decl))
2719 67903 : || (DECL_LANG_SPECIFIC (decl)
2720 67284 : && DECL_TEMPLOID_INSTANTIATION (decl))
2721 38507981 : || (VAR_P (decl) && DECL_INLINE_VAR_P (decl)))
2722 : return true;
2723 33149 : else if (DECL_FUNCTION_SCOPE_P (decl))
2724 : /* A local static in an inline effectively has vague linkage. */
2725 0 : return (TREE_STATIC (decl)
2726 0 : && vague_linkage_p (DECL_CONTEXT (decl)));
2727 : else
2728 : return false;
2729 : }
2730 :
2731 : /* Determine whether or not we want to specifically import or export CTYPE,
2732 : using various heuristics. */
2733 :
2734 : static void
2735 4041450 : import_export_class (tree ctype)
2736 : {
2737 : /* -1 for imported, 1 for exported. */
2738 4041450 : int import_export = 0;
2739 :
2740 : /* It only makes sense to call this function at EOF. The reason is
2741 : that this function looks at whether or not the first non-inline
2742 : non-abstract virtual member function has been defined in this
2743 : translation unit. But, we can't possibly know that until we've
2744 : seen the entire translation unit. */
2745 4041450 : gcc_assert (at_eof);
2746 :
2747 4041450 : if (CLASSTYPE_INTERFACE_KNOWN (ctype))
2748 : return;
2749 :
2750 : /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
2751 : we will have CLASSTYPE_INTERFACE_ONLY set but not
2752 : CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
2753 : heuristic because someone will supply a #pragma implementation
2754 : elsewhere, and deducing it here would produce a conflict. */
2755 2190596 : if (CLASSTYPE_INTERFACE_ONLY (ctype))
2756 : return;
2757 :
2758 2190596 : if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
2759 : import_export = -1;
2760 2190596 : else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
2761 : import_export = 1;
2762 2190596 : else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
2763 2190596 : && !flag_implicit_templates)
2764 : /* For a template class, without -fimplicit-templates, check the
2765 : repository. If the virtual table is assigned to this
2766 : translation unit, then export the class; otherwise, import
2767 : it. */
2768 : import_export = -1;
2769 2189953 : else if (TYPE_CONTAINS_VPTR_P (ctype))
2770 : {
2771 2014787 : tree cdecl = TYPE_NAME (ctype);
2772 2018617 : if (DECL_LANG_SPECIFIC (cdecl) && DECL_MODULE_ATTACH_P (cdecl))
2773 : /* For class types attached to a named module, the ABI specifies
2774 : that the tables are uniquely emitted in the object for the
2775 : module unit in which it is defined. */
2776 1746 : import_export = (DECL_MODULE_IMPORT_P (cdecl) ? -1 : 1);
2777 : else
2778 : {
2779 : /* The ABI specifies that the virtual table and associated
2780 : information are emitted with the key method, if any. */
2781 2014592 : tree method = CLASSTYPE_KEY_METHOD (ctype);
2782 : /* If weak symbol support is not available, then we must be
2783 : careful not to emit the vtable when the key function is
2784 : inline. An inline function can be defined in multiple
2785 : translation units. If we were to emit the vtable in each
2786 : translation unit containing a definition, we would get
2787 : multiple definition errors at link-time. */
2788 1990730 : if (method && (flag_weak || ! DECL_NONGNU_INLINE_P (method)))
2789 605330 : import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
2790 : }
2791 : }
2792 :
2793 : /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
2794 : a definition anywhere else. */
2795 2190596 : if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
2796 : import_export = 0;
2797 :
2798 : /* Allow back ends the chance to overrule the decision. */
2799 2190596 : if (targetm.cxx.import_export_class)
2800 0 : import_export = targetm.cxx.import_export_class (ctype, import_export);
2801 :
2802 2190596 : if (import_export)
2803 : {
2804 606168 : SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
2805 606168 : CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
2806 : }
2807 : }
2808 :
2809 : /* Return true if VAR has already been provided to the back end; in that
2810 : case VAR should not be modified further by the front end. */
2811 : static bool
2812 107562915 : var_finalized_p (tree var)
2813 : {
2814 0 : return varpool_node::get_create (var)->definition;
2815 : }
2816 :
2817 : /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
2818 : must be emitted in this translation unit. Mark it as such. */
2819 :
2820 : void
2821 50392 : mark_needed (tree decl)
2822 : {
2823 50392 : gcc_checking_assert (!consteval_only_p (decl));
2824 :
2825 50392 : TREE_USED (decl) = 1;
2826 50392 : if (TREE_CODE (decl) == FUNCTION_DECL)
2827 : {
2828 : /* Extern inline functions don't become needed when referenced.
2829 : If we know a method will be emitted in other TU and no new
2830 : functions can be marked reachable, just use the external
2831 : definition. */
2832 42180 : struct cgraph_node *node = cgraph_node::get_create (decl);
2833 42180 : node->forced_by_abi = true;
2834 :
2835 : /* #pragma interface can call mark_needed for
2836 : maybe-in-charge 'tors; mark the clones as well. */
2837 42180 : tree clone;
2838 50618 : FOR_EACH_CLONE (clone, decl)
2839 8438 : mark_needed (clone);
2840 : }
2841 8212 : else if (VAR_P (decl))
2842 : {
2843 8212 : varpool_node *node = varpool_node::get_create (decl);
2844 : /* C++ frontend use mark_decl_references to force COMDAT variables
2845 : to be output that might appear dead otherwise. */
2846 8212 : node->forced_by_abi = true;
2847 : }
2848 50392 : }
2849 :
2850 : /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
2851 : returns true if a definition of this entity should be provided in
2852 : this object file. Callers use this function to determine whether
2853 : or not to let the back end know that a definition of DECL is
2854 : available in this translation unit. */
2855 :
2856 : bool
2857 335720531 : decl_needed_p (tree decl)
2858 : {
2859 335720531 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
2860 : /* This function should only be called at the end of the translation
2861 : unit. We cannot be sure of whether or not something will be
2862 : COMDAT until that point. */
2863 335720531 : gcc_assert (at_eof);
2864 :
2865 : /* All entities with external linkage that are not COMDAT/EXTERN should be
2866 : emitted; they may be referred to from other object files. */
2867 335720531 : if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_REALLY_EXTERN (decl))
2868 : return true;
2869 :
2870 : /* Functions marked "dllexport" must be emitted so that they are
2871 : visible to other DLLs. */
2872 335720251 : if (flag_keep_inline_dllexport
2873 335720251 : && lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl)))
2874 : return true;
2875 :
2876 : /* When not optimizing, do not bother to produce definitions for extern
2877 : symbols. */
2878 415028930 : if (DECL_REALLY_EXTERN (decl)
2879 0 : && ((TREE_CODE (decl) != FUNCTION_DECL
2880 0 : && !optimize)
2881 0 : || (TREE_CODE (decl) == FUNCTION_DECL
2882 0 : && !opt_for_fn (decl, optimize)))
2883 335720251 : && !lookup_attribute ("always_inline", decl))
2884 : return false;
2885 :
2886 : /* If this entity was used, let the back end see it; it will decide
2887 : whether or not to emit it into the object file. */
2888 335720251 : if (TREE_USED (decl))
2889 : return true;
2890 :
2891 : /* Virtual functions might be needed for devirtualization. */
2892 69689911 : if (flag_devirtualize
2893 67070375 : && TREE_CODE (decl) == FUNCTION_DECL
2894 135537435 : && DECL_VIRTUAL_P (decl))
2895 700254 : return true;
2896 :
2897 : /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
2898 : reference to DECL might cause it to be emitted later. */
2899 : return false;
2900 : }
2901 :
2902 : /* If necessary, write out the vtables for the dynamic class CTYPE.
2903 : Returns true if any vtables were emitted. */
2904 :
2905 : static bool
2906 3777226 : maybe_emit_vtables (tree ctype, vec<tree> &consteval_vtables)
2907 : {
2908 3777226 : tree vtbl;
2909 3777226 : tree primary_vtbl;
2910 3777226 : int needed = 0;
2911 3777226 : varpool_node *current = NULL, *last = NULL;
2912 :
2913 : /* If the vtables for this class have already been emitted there is
2914 : nothing more to do. */
2915 3777226 : primary_vtbl = CLASSTYPE_VTABLES (ctype);
2916 3777226 : if (var_finalized_p (primary_vtbl))
2917 : return false;
2918 : /* Ignore dummy vtables made by get_vtable_decl. */
2919 3777226 : if (TREE_TYPE (primary_vtbl) == void_type_node)
2920 : return false;
2921 :
2922 : /* On some targets, we cannot determine the key method until the end
2923 : of the translation unit -- which is when this function is
2924 : called. */
2925 3777226 : if (!targetm.cxx.key_method_may_be_inline ())
2926 0 : determine_key_method (ctype);
2927 :
2928 : /* See if any of the vtables are needed. */
2929 9239318 : for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = DECL_CHAIN (vtbl))
2930 : {
2931 5462092 : import_export_decl (vtbl);
2932 5462092 : if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
2933 : needed = 1;
2934 : }
2935 3777226 : if (!needed)
2936 : {
2937 : /* If the references to this class' vtables are optimized away,
2938 : still emit the appropriate debugging information. See
2939 : dfs_debug_mark. */
2940 3417560 : if (DECL_COMDAT (primary_vtbl)
2941 3417560 : && CLASSTYPE_DEBUG_REQUESTED (ctype))
2942 39147 : note_debug_info_needed (ctype);
2943 : return false;
2944 : }
2945 :
2946 : /* The ABI requires that we emit all of the vtables if we emit any
2947 : of them. */
2948 739742 : for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = DECL_CHAIN (vtbl))
2949 : {
2950 : /* Mark entities references from the virtual table as used. */
2951 380076 : mark_vtable_entries (vtbl, consteval_vtables);
2952 :
2953 380076 : if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
2954 : {
2955 0 : vec<tree, va_gc> *cleanups = NULL;
2956 0 : tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl), &cleanups,
2957 : LOOKUP_NORMAL);
2958 :
2959 : /* It had better be all done at compile-time. */
2960 0 : gcc_assert (!expr && !cleanups);
2961 : }
2962 :
2963 : /* Write it out. */
2964 380076 : DECL_EXTERNAL (vtbl) = 0;
2965 380076 : rest_of_decl_compilation (vtbl, 1, 1);
2966 :
2967 : /* Because we're only doing syntax-checking, we'll never end up
2968 : actually marking the variable as written. */
2969 380076 : if (flag_syntax_only)
2970 33 : TREE_ASM_WRITTEN (vtbl) = 1;
2971 380043 : else if (DECL_ONE_ONLY (vtbl))
2972 : {
2973 379314 : current = varpool_node::get_create (vtbl);
2974 379314 : if (last)
2975 20316 : current->add_to_same_comdat_group (last);
2976 : last = current;
2977 : }
2978 : }
2979 :
2980 : /* For abstract classes, the destructor has been removed from the
2981 : vtable (in class.cc's build_vtbl_initializer). For a compiler-
2982 : generated destructor, it hence might not have been generated in
2983 : this translation unit - and with '#pragma interface' it might
2984 : never get generated. */
2985 359666 : if (CLASSTYPE_PURE_VIRTUALS (ctype)
2986 113599 : && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (ctype)
2987 71915 : && !CLASSTYPE_LAZY_DESTRUCTOR (ctype)
2988 431578 : && DECL_DEFAULTED_IN_CLASS_P (CLASSTYPE_DESTRUCTOR (ctype)))
2989 66 : note_vague_linkage_fn (CLASSTYPE_DESTRUCTOR (ctype));
2990 :
2991 : /* Since we're writing out the vtable here, also write the debug
2992 : info. */
2993 359666 : note_debug_info_needed (ctype);
2994 :
2995 359666 : return true;
2996 : }
2997 :
2998 : /* A special return value from type_visibility meaning internal
2999 : linkage. */
3000 :
3001 : enum { VISIBILITY_ANON = VISIBILITY_INTERNAL+1 };
3002 :
3003 : static int expr_visibility (tree);
3004 : static int type_visibility (tree);
3005 :
3006 : /* walk_tree helper function for type_visibility. */
3007 :
3008 : static tree
3009 4161432373 : min_vis_r (tree *tp, int *walk_subtrees, void *data)
3010 : {
3011 4161432373 : int *vis_p = (int *)data;
3012 4161432373 : int this_vis = VISIBILITY_DEFAULT;
3013 4161432373 : if (! TYPE_P (*tp))
3014 826709744 : *walk_subtrees = 0;
3015 3334722629 : else if (OVERLOAD_TYPE_P (*tp)
3016 4363524010 : && !TREE_PUBLIC (TYPE_MAIN_DECL (*tp)))
3017 : {
3018 1012005 : this_vis = VISIBILITY_ANON;
3019 1012005 : *walk_subtrees = 0;
3020 : }
3021 3333710624 : else if (CLASS_TYPE_P (*tp))
3022 : {
3023 999620586 : this_vis = CLASSTYPE_VISIBILITY (*tp);
3024 999620586 : *walk_subtrees = 0;
3025 : }
3026 2334090038 : else if (TREE_CODE (*tp) == ARRAY_TYPE
3027 2334090038 : && uses_template_parms (TYPE_DOMAIN (*tp)))
3028 428223 : this_vis = expr_visibility (TYPE_MAX_VALUE (TYPE_DOMAIN (*tp)));
3029 :
3030 4161432373 : if (this_vis > *vis_p)
3031 1702112 : *vis_p = this_vis;
3032 :
3033 : /* Tell cp_walk_subtrees to look through typedefs. */
3034 4161432373 : if (*walk_subtrees == 1)
3035 2334090038 : *walk_subtrees = 2;
3036 :
3037 4161432373 : return NULL;
3038 : }
3039 :
3040 : /* walk_tree helper function for expr_visibility. */
3041 :
3042 : static tree
3043 268087163 : min_vis_expr_r (tree *tp, int *walk_subtrees, void *data)
3044 : {
3045 268087163 : int *vis_p = (int *)data;
3046 268087163 : int tpvis = VISIBILITY_DEFAULT;
3047 :
3048 268087163 : tree t = *tp;
3049 268087163 : if (TREE_CODE (t) == PTRMEM_CST)
3050 1372 : t = PTRMEM_CST_MEMBER (t);
3051 :
3052 268087163 : if (TREE_CODE (t) == TEMPLATE_DECL)
3053 : {
3054 7147985 : if (DECL_ALIAS_TEMPLATE_P (t) || concept_definition_p (t))
3055 : /* FIXME: We don't maintain TREE_PUBLIC / DECL_VISIBILITY for
3056 : alias templates so we can't trust it here (PR107906). Ditto
3057 : for concepts. */
3058 : return NULL_TREE;
3059 : t = DECL_TEMPLATE_RESULT (t);
3060 : if (!t)
3061 : return NULL_TREE;
3062 : }
3063 :
3064 267337412 : switch (TREE_CODE (t))
3065 : {
3066 8705808 : case CAST_EXPR:
3067 8705808 : case IMPLICIT_CONV_EXPR:
3068 8705808 : case STATIC_CAST_EXPR:
3069 8705808 : case REINTERPRET_CAST_EXPR:
3070 8705808 : case CONST_CAST_EXPR:
3071 8705808 : case DYNAMIC_CAST_EXPR:
3072 8705808 : case NEW_EXPR:
3073 8705808 : case CONSTRUCTOR:
3074 8705808 : case LAMBDA_EXPR:
3075 8705808 : case TYPE_DECL:
3076 8705808 : tpvis = type_visibility (TREE_TYPE (t));
3077 8705808 : break;
3078 :
3079 8279 : case ADDR_EXPR:
3080 8279 : t = TREE_OPERAND (t, 0);
3081 8279 : if (VAR_P (t))
3082 : /* If a variable has its address taken, the lvalue-rvalue conversion is
3083 : not applied, so skip that case. */
3084 4783 : goto addressable;
3085 : break;
3086 :
3087 9102507 : case VAR_DECL:
3088 9102507 : case FUNCTION_DECL:
3089 9102507 : if (decl_constant_var_p (t))
3090 : /* The ODR allows definitions in different TUs to refer to distinct
3091 : constant variables with internal or no linkage, so such a reference
3092 : shouldn't affect visibility if the lvalue-rvalue conversion is
3093 : applied (PR110323). We still want to restrict visibility according
3094 : to the type of the declaration however. */
3095 : {
3096 5230562 : tpvis = type_visibility (TREE_TYPE (t));
3097 5230562 : break;
3098 : }
3099 3871945 : addressable:
3100 : /* For _DECLs with no linkage refer to the linkage of the containing
3101 : entity that does have a name with linkage. */
3102 3877142 : if (decl_linkage (t) == lk_none)
3103 29873 : tpvis = expr_visibility (DECL_CONTEXT (t));
3104 : /* Decls that have had their visibility constrained will report
3105 : as external linkage, but we still want to transitively constrain
3106 : if we refer to them, so just check TREE_PUBLIC instead. */
3107 3847269 : else if (!TREE_PUBLIC (t))
3108 : tpvis = VISIBILITY_ANON;
3109 : else
3110 3845683 : tpvis = DECL_VISIBILITY (t);
3111 : break;
3112 :
3113 2048 : case FIELD_DECL:
3114 2048 : tpvis = type_visibility (DECL_CONTEXT (t));
3115 2048 : break;
3116 :
3117 1914 : case REFLECT_EXPR:
3118 1914 : tree r;
3119 1914 : r = REFLECT_EXPR_HANDLE (t);
3120 1914 : switch (REFLECT_EXPR_KIND (t))
3121 : {
3122 48 : case REFLECT_BASE:
3123 : /* For direct base class relationship, determine visibility
3124 : from both D and B types. */
3125 48 : tpvis = type_visibility (BINFO_TYPE (r));
3126 48 : if (tpvis > *vis_p)
3127 2 : *vis_p = tpvis;
3128 48 : tpvis = type_visibility (direct_base_derived (r));
3129 48 : *walk_subtrees = 0;
3130 48 : break;
3131 38 : case REFLECT_DATA_MEMBER_SPEC:
3132 : /* For data member description determine visibility
3133 : from the type. */
3134 38 : tpvis = type_visibility (TREE_VEC_ELT (r, 0));
3135 38 : *walk_subtrees = 0;
3136 38 : break;
3137 90 : case REFLECT_PARM:
3138 : /* For function parameter reflection determine visibility
3139 : based on parent_of. */
3140 90 : tpvis = expr_visibility (DECL_CONTEXT (r));
3141 90 : *walk_subtrees = 0;
3142 90 : break;
3143 6 : case REFLECT_ANNOTATION:
3144 : /* Annotations are always local to the TU. */
3145 6 : tpvis = VISIBILITY_ANON;
3146 6 : *walk_subtrees = 0;
3147 6 : break;
3148 20 : case REFLECT_OBJECT:
3149 20 : r = get_base_address (r);
3150 1732 : gcc_fallthrough ();
3151 1732 : default:
3152 1732 : if (TYPE_P (r))
3153 : {
3154 350 : tpvis = type_visibility (r);
3155 350 : *walk_subtrees = 0;
3156 350 : break;
3157 : }
3158 1382 : if (VAR_P (r) || TREE_CODE (r) == PARM_DECL)
3159 : {
3160 414 : t = r;
3161 414 : goto addressable;
3162 : }
3163 : break;
3164 : }
3165 : break;
3166 :
3167 : default:
3168 : break;
3169 : }
3170 :
3171 267337412 : if (tpvis > *vis_p)
3172 3609 : *vis_p = tpvis;
3173 :
3174 : return NULL_TREE;
3175 : }
3176 :
3177 : /* Returns the visibility of TYPE, which is the minimum visibility of its
3178 : component types. */
3179 :
3180 : static int
3181 1201899384 : type_visibility (tree type)
3182 : {
3183 1201899384 : int vis = VISIBILITY_DEFAULT;
3184 1201899384 : cp_walk_tree_without_duplicates (&type, min_vis_r, &vis);
3185 1201899384 : return vis;
3186 : }
3187 :
3188 : /* Returns the visibility of an expression EXPR that appears in the signature
3189 : of a function template, which is the minimum visibility of names that appear
3190 : in its mangling. */
3191 :
3192 : static int
3193 90515477 : expr_visibility (tree expr)
3194 : {
3195 90515477 : int vis = VISIBILITY_DEFAULT;
3196 90515477 : cp_walk_tree_without_duplicates (&expr, min_vis_expr_r, &vis);
3197 90515477 : return vis;
3198 : }
3199 :
3200 : /* Limit the visibility of DECL to VISIBILITY, if not explicitly
3201 : specified (or if VISIBILITY is static). If TMPL is true, this
3202 : constraint is for a template argument, and takes precedence
3203 : over explicitly-specified visibility on the template. */
3204 :
3205 : static void
3206 80293750 : constrain_visibility (tree decl, int visibility, bool tmpl)
3207 : {
3208 80293750 : if (visibility == VISIBILITY_ANON)
3209 : {
3210 : /* extern "C" declarations aren't affected by the anonymous
3211 : namespace. */
3212 1463514 : if (!DECL_EXTERN_C_P (decl))
3213 : {
3214 1463338 : TREE_PUBLIC (decl) = 0;
3215 1463338 : DECL_WEAK (decl) = 0;
3216 1463338 : DECL_COMMON (decl) = 0;
3217 1463338 : DECL_COMDAT (decl) = false;
3218 1463338 : if (VAR_OR_FUNCTION_DECL_P (decl))
3219 : {
3220 440645 : struct symtab_node *snode = symtab_node::get (decl);
3221 :
3222 440645 : if (snode)
3223 37392 : snode->set_comdat_group (NULL);
3224 : }
3225 1463338 : DECL_INTERFACE_KNOWN (decl) = 1;
3226 1463338 : if (DECL_LANG_SPECIFIC (decl))
3227 444443 : DECL_NOT_REALLY_EXTERN (decl) = 1;
3228 : }
3229 : }
3230 78830236 : else if (visibility > DECL_VISIBILITY (decl)
3231 78830236 : && (tmpl || !DECL_VISIBILITY_SPECIFIED (decl)))
3232 : {
3233 309 : DECL_VISIBILITY (decl) = (enum symbol_visibility) visibility;
3234 : /* This visibility was not specified. */
3235 309 : DECL_VISIBILITY_SPECIFIED (decl) = false;
3236 : }
3237 80293750 : }
3238 :
3239 : /* Constrain the visibility of DECL based on the visibility of its template
3240 : arguments. */
3241 :
3242 : static void
3243 363564726 : constrain_visibility_for_template (tree decl, tree targs)
3244 : {
3245 : /* If this is a template instantiation, check the innermost
3246 : template args for visibility constraints. The outer template
3247 : args are covered by the class check. */
3248 363564726 : tree args = INNERMOST_TEMPLATE_ARGS (targs);
3249 363564726 : int i;
3250 1059340520 : for (i = TREE_VEC_LENGTH (args); i > 0; --i)
3251 : {
3252 695775794 : int vis = 0;
3253 :
3254 695775794 : tree arg = TREE_VEC_ELT (args, i-1);
3255 695775794 : if (TYPE_P (arg))
3256 607388638 : vis = type_visibility (arg);
3257 : else
3258 88387156 : vis = expr_visibility (arg);
3259 695775794 : if (vis)
3260 376781 : constrain_visibility (decl, vis, true);
3261 : }
3262 363564726 : }
3263 :
3264 : /* Like c_determine_visibility, but with additional C++-specific
3265 : behavior.
3266 :
3267 : Function-scope entities can rely on the function's visibility because
3268 : it is set in start_preparsed_function.
3269 :
3270 : Class-scope entities cannot rely on the class's visibility until the end
3271 : of the enclosing class definition.
3272 :
3273 : Note that because namespaces have multiple independent definitions,
3274 : namespace visibility is handled elsewhere using the #pragma visibility
3275 : machinery rather than by decorating the namespace declaration.
3276 :
3277 : The goal is for constraints from the type to give a diagnostic, and
3278 : other constraints to be applied silently. */
3279 :
3280 : void
3281 720041094 : determine_visibility (tree decl)
3282 : {
3283 : /* Remember that all decls get VISIBILITY_DEFAULT when built. */
3284 :
3285 : /* Only relevant for names with external linkage. */
3286 720041094 : if (!TREE_PUBLIC (decl))
3287 : return;
3288 :
3289 : /* Cloned constructors and destructors get the same visibility as
3290 : the underlying function. That should be set up in
3291 : maybe_clone_body. */
3292 669328928 : gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
3293 :
3294 669328928 : bool orig_visibility_specified = DECL_VISIBILITY_SPECIFIED (decl);
3295 669328928 : enum symbol_visibility orig_visibility = DECL_VISIBILITY (decl);
3296 :
3297 : /* The decl may be a template instantiation, which could influence
3298 : visibility. */
3299 669328928 : tree template_decl = NULL_TREE;
3300 669328928 : if (TREE_CODE (decl) == TYPE_DECL)
3301 : {
3302 185836113 : if (CLASS_TYPE_P (TREE_TYPE (decl)))
3303 : {
3304 182658061 : if (CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl)))
3305 371627696 : template_decl = decl;
3306 : }
3307 3178052 : else if (TYPE_TEMPLATE_INFO (TREE_TYPE (decl)))
3308 371627696 : template_decl = decl;
3309 : }
3310 483492815 : else if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3311 : template_decl = decl;
3312 :
3313 669328928 : if (TREE_CODE (decl) == TYPE_DECL
3314 367333039 : && LAMBDA_TYPE_P (TREE_TYPE (decl))
3315 672683771 : && CLASSTYPE_LAMBDA_EXPR (TREE_TYPE (decl)) != error_mark_node)
3316 3348858 : if (tree extra = LAMBDA_TYPE_EXTRA_SCOPE (TREE_TYPE (decl)))
3317 : {
3318 : /* The lambda's visibility is limited by that of its extra
3319 : scope. */
3320 1670135 : int vis = 0;
3321 1670135 : if (TYPE_P (extra))
3322 0 : vis = type_visibility (extra);
3323 : else
3324 1670135 : vis = expr_visibility (extra);
3325 1670135 : constrain_visibility (decl, vis, false);
3326 : }
3327 :
3328 : /* If DECL is a member of a class, visibility specifiers on the
3329 : class can influence the visibility of the DECL. */
3330 669328928 : tree class_type = NULL_TREE;
3331 669328928 : if (DECL_CLASS_SCOPE_P (decl))
3332 339903537 : class_type = DECL_CONTEXT (decl);
3333 : else
3334 : {
3335 : /* Not a class member. */
3336 :
3337 : /* Virtual tables have DECL_CONTEXT set to their associated class,
3338 : so they are automatically handled above. */
3339 329425391 : gcc_assert (!VAR_P (decl)
3340 : || !DECL_VTABLE_OR_VTT_P (decl));
3341 :
3342 329425391 : if (DECL_FUNCTION_SCOPE_P (decl) && ! DECL_VISIBILITY_SPECIFIED (decl))
3343 : {
3344 : /* Local statics and classes get the visibility of their
3345 : containing function by default, except that
3346 : -fvisibility-inlines-hidden doesn't affect them. */
3347 2563736 : tree fn = DECL_CONTEXT (decl);
3348 2563736 : if (DECL_VISIBILITY_SPECIFIED (fn))
3349 : {
3350 2474770 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
3351 7424310 : DECL_VISIBILITY_SPECIFIED (decl) =
3352 2474770 : DECL_VISIBILITY_SPECIFIED (fn);
3353 : }
3354 : else
3355 : {
3356 88966 : if (DECL_CLASS_SCOPE_P (fn))
3357 50042 : determine_visibility_from_class (decl, DECL_CONTEXT (fn));
3358 38924 : else if (determine_hidden_inline (fn))
3359 : {
3360 6 : DECL_VISIBILITY (decl) = default_visibility;
3361 12 : DECL_VISIBILITY_SPECIFIED (decl) =
3362 6 : visibility_options.inpragma;
3363 : }
3364 : else
3365 : {
3366 38918 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
3367 116754 : DECL_VISIBILITY_SPECIFIED (decl) =
3368 38918 : DECL_VISIBILITY_SPECIFIED (fn);
3369 : }
3370 : }
3371 :
3372 : /* Local classes in templates have CLASSTYPE_USE_TEMPLATE set,
3373 : but have no TEMPLATE_INFO, so don't try to check it. */
3374 : template_decl = NULL_TREE;
3375 : }
3376 49908787 : else if (VAR_P (decl) && DECL_TINFO_P (decl)
3377 332052390 : && flag_visibility_ms_compat)
3378 : {
3379 : /* Under -fvisibility-ms-compat, types are visible by default,
3380 : even though their contents aren't. */
3381 84 : tree underlying_type = TREE_TYPE (DECL_NAME (decl));
3382 84 : int underlying_vis = type_visibility (underlying_type);
3383 84 : if (underlying_vis == VISIBILITY_ANON
3384 84 : || (CLASS_TYPE_P (underlying_type)
3385 69 : && CLASSTYPE_VISIBILITY_SPECIFIED (underlying_type)))
3386 54 : constrain_visibility (decl, underlying_vis, false);
3387 : else
3388 30 : DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3389 : }
3390 326861571 : else if (VAR_P (decl) && DECL_TINFO_P (decl))
3391 : {
3392 : /* tinfo visibility is based on the type it's for. */
3393 5190651 : constrain_visibility
3394 5190651 : (decl, type_visibility (TREE_TYPE (DECL_NAME (decl))), false);
3395 :
3396 : /* Give the target a chance to override the visibility associated
3397 : with DECL. */
3398 5190651 : if (TREE_PUBLIC (decl)
3399 5188651 : && !DECL_REALLY_EXTERN (decl)
3400 5188651 : && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl)))
3401 10347987 : && !CLASSTYPE_VISIBILITY_SPECIFIED (TREE_TYPE (DECL_NAME (decl))))
3402 114494 : targetm.cxx.determine_class_data_visibility (decl);
3403 : }
3404 321670920 : else if (template_decl)
3405 : /* Template instantiations and specializations get visibility based
3406 : on their template unless they override it with an attribute. */;
3407 108235482 : else if (! DECL_VISIBILITY_SPECIFIED (decl))
3408 : {
3409 99777383 : if (determine_hidden_inline (decl))
3410 12 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3411 : else
3412 : {
3413 : /* Set default visibility to whatever the user supplied with
3414 : #pragma GCC visibility or a namespace visibility attribute. */
3415 99777371 : DECL_VISIBILITY (decl) = default_visibility;
3416 99777371 : DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma;
3417 : }
3418 : }
3419 : }
3420 :
3421 455893490 : if (template_decl)
3422 : {
3423 : /* If the specialization doesn't specify visibility, use the
3424 : visibility from the template. */
3425 370988121 : tree tinfo = get_template_info (template_decl);
3426 370988121 : tree args = TI_ARGS (tinfo);
3427 370988121 : tree attribs = (TREE_CODE (decl) == TYPE_DECL
3428 370988121 : ? TYPE_ATTRIBUTES (TREE_TYPE (decl))
3429 370988121 : : DECL_ATTRIBUTES (decl));
3430 370988121 : tree attr = lookup_attribute ("visibility", attribs);
3431 :
3432 370988121 : if (args != error_mark_node)
3433 : {
3434 370988121 : tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
3435 :
3436 370988121 : if (!DECL_VISIBILITY_SPECIFIED (decl))
3437 : {
3438 167253017 : if (!attr
3439 167253017 : && determine_hidden_inline (decl))
3440 33 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3441 : else
3442 : {
3443 167252984 : DECL_VISIBILITY (decl) = DECL_VISIBILITY (pattern);
3444 334505968 : DECL_VISIBILITY_SPECIFIED (decl)
3445 167252984 : = DECL_VISIBILITY_SPECIFIED (pattern);
3446 : }
3447 : }
3448 :
3449 370988121 : if (args
3450 : /* Template argument visibility outweighs #pragma or namespace
3451 : visibility, but not an explicit attribute. */
3452 370988121 : && !attr)
3453 : {
3454 370988100 : int depth = TMPL_ARGS_DEPTH (args);
3455 370988100 : if (DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P (TI_TEMPLATE (tinfo)))
3456 : /* Class template args don't affect template friends. */;
3457 368121401 : else if (DECL_VISIBILITY_SPECIFIED (decl))
3458 : {
3459 : /* A class template member with explicit visibility
3460 : overrides the class visibility, so we need to apply
3461 : all the levels of template args directly. */
3462 : int i;
3463 654350090 : for (i = 1; i <= depth; ++i)
3464 : {
3465 332140947 : tree lev = TMPL_ARGS_LEVEL (args, i);
3466 332140947 : constrain_visibility_for_template (decl, lev);
3467 : }
3468 : }
3469 45912258 : else if (PRIMARY_TEMPLATE_P (TI_TEMPLATE (tinfo)))
3470 : /* Limit visibility based on its template arguments. */
3471 31423779 : constrain_visibility_for_template (decl, args);
3472 : }
3473 : }
3474 : }
3475 :
3476 669328928 : if (class_type)
3477 339903537 : determine_visibility_from_class (decl, class_type);
3478 :
3479 669328928 : if (decl_internal_context_p (decl))
3480 : /* Names in an anonymous namespace get internal linkage. */
3481 304368 : constrain_visibility (decl, VISIBILITY_ANON, false);
3482 669024560 : else if (TREE_CODE (decl) != TYPE_DECL)
3483 : {
3484 : /* Propagate anonymity from type to decl. */
3485 483326916 : int tvis = type_visibility (TREE_TYPE (decl));
3486 483326916 : if (tvis == VISIBILITY_ANON
3487 483326916 : || ! DECL_VISIBILITY_SPECIFIED (decl))
3488 71960569 : constrain_visibility (decl, tvis, false);
3489 : }
3490 185697644 : else if (no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/true))
3491 : /* DR 757: A type without linkage shall not be used as the type of a
3492 : variable or function with linkage, unless
3493 : o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
3494 : o the variable or function is not used (3.2 [basic.def.odr]) or is
3495 : defined in the same translation unit.
3496 :
3497 : Since non-extern "C" decls need to be defined in the same
3498 : translation unit, we can make the type internal. */
3499 791192 : constrain_visibility (decl, VISIBILITY_ANON, false);
3500 :
3501 : /* If visibility changed and DECL already has DECL_RTL, ensure
3502 : symbol flags are updated. */
3503 669328928 : if ((DECL_VISIBILITY (decl) != orig_visibility
3504 668340721 : || DECL_VISIBILITY_SPECIFIED (decl) != orig_visibility_specified)
3505 352604562 : && ((VAR_P (decl) && TREE_STATIC (decl))
3506 326594815 : || TREE_CODE (decl) == FUNCTION_DECL)
3507 998758365 : && DECL_RTL_SET_P (decl))
3508 0 : make_decl_rtl (decl);
3509 : }
3510 :
3511 : /* By default, static data members and function members receive
3512 : the visibility of their containing class. */
3513 :
3514 : static void
3515 339953579 : determine_visibility_from_class (tree decl, tree class_type)
3516 : {
3517 339953579 : if (DECL_VISIBILITY_SPECIFIED (decl))
3518 : return;
3519 :
3520 170290391 : if (determine_hidden_inline (decl))
3521 145 : DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
3522 : else
3523 : {
3524 : /* Default to the class visibility. */
3525 170290246 : DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
3526 340580492 : DECL_VISIBILITY_SPECIFIED (decl)
3527 170290246 : = CLASSTYPE_VISIBILITY_SPECIFIED (class_type);
3528 : }
3529 :
3530 : /* Give the target a chance to override the visibility associated
3531 : with DECL. */
3532 170290391 : if (VAR_P (decl)
3533 17454299 : && TREE_PUBLIC (decl)
3534 17454287 : && (DECL_TINFO_P (decl) || DECL_VTABLE_OR_VTT_P (decl))
3535 2340677 : && !DECL_REALLY_EXTERN (decl)
3536 172631068 : && !CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
3537 78269 : targetm.cxx.determine_class_data_visibility (decl);
3538 : }
3539 :
3540 : /* Returns true iff DECL is an inline that should get hidden visibility
3541 : because of -fvisibility-inlines-hidden. */
3542 :
3543 : static bool
3544 437359715 : determine_hidden_inline (tree decl)
3545 : {
3546 437359715 : return (visibility_options.inlines_hidden
3547 : /* Don't do this for inline templates; specializations might not be
3548 : inline, and we don't want them to inherit the hidden
3549 : visibility. We'll set it here for all inline instantiations. */
3550 410 : && !processing_template_decl
3551 386 : && TREE_CODE (decl) == FUNCTION_DECL
3552 297 : && DECL_DECLARED_INLINE_P (decl)
3553 437359926 : && (! DECL_LANG_SPECIFIC (decl)
3554 211 : || ! DECL_EXPLICIT_INSTANTIATION (decl)));
3555 : }
3556 :
3557 : /* Constrain the visibility of a class TYPE based on the visibility of its
3558 : field types. Warn if any fields require lesser visibility. */
3559 :
3560 : void
3561 53609360 : constrain_class_visibility (tree type)
3562 : {
3563 53609360 : tree binfo;
3564 53609360 : tree t;
3565 53609360 : int i;
3566 :
3567 53609360 : int vis = type_visibility (type);
3568 :
3569 53609360 : if (vis == VISIBILITY_ANON
3570 53609360 : || DECL_IN_SYSTEM_HEADER (TYPE_MAIN_DECL (type)))
3571 53609360 : return;
3572 :
3573 : /* Don't warn about visibility if the class has explicit visibility. */
3574 52220311 : if (CLASSTYPE_VISIBILITY_SPECIFIED (type))
3575 51356054 : vis = VISIBILITY_INTERNAL;
3576 :
3577 431710648 : for (t = TYPE_FIELDS (type); t; t = DECL_CHAIN (t))
3578 38774876 : if (TREE_CODE (t) == FIELD_DECL && TREE_TYPE (t) != error_mark_node
3579 418265053 : && !DECL_ARTIFICIAL (t))
3580 : {
3581 13243869 : tree ftype = strip_pointer_or_array_types (TREE_TYPE (t));
3582 13243869 : int subvis = type_visibility (ftype);
3583 :
3584 13243869 : if (subvis == VISIBILITY_ANON)
3585 : {
3586 114 : if (!in_main_input_context())
3587 : {
3588 27 : tree nlt = no_linkage_check (ftype, /*relaxed_p=*/false);
3589 27 : if (nlt)
3590 : {
3591 6 : if (same_type_p (TREE_TYPE (t), nlt))
3592 6 : warning (OPT_Wsubobject_linkage, "\
3593 : %qT has a field %q#D whose type has no linkage",
3594 : type, t);
3595 : else
3596 0 : warning (OPT_Wsubobject_linkage, "\
3597 : %qT has a field %qD whose type depends on the type %qT which has no linkage",
3598 : type, t, nlt);
3599 : }
3600 21 : else if (cxx_dialect > cxx98
3601 21 : && !decl_anon_ns_mem_p (ftype))
3602 2 : warning (OPT_Wsubobject_linkage, "\
3603 : %qT has a field %q#D whose type has internal linkage",
3604 : type, t);
3605 : else // In C++98 this can only happen with unnamed namespaces.
3606 19 : warning (OPT_Wsubobject_linkage, "\
3607 : %qT has a field %q#D whose type uses the anonymous namespace",
3608 : type, t);
3609 : }
3610 : }
3611 13243755 : else if (MAYBE_CLASS_TYPE_P (ftype)
3612 5106079 : && vis < VISIBILITY_HIDDEN
3613 5106079 : && subvis >= VISIBILITY_HIDDEN)
3614 6 : warning (OPT_Wattributes, "\
3615 : %qT declared with greater visibility than the type of its field %qD",
3616 : type, t);
3617 : }
3618 :
3619 52220311 : binfo = TYPE_BINFO (type);
3620 77421275 : for (i = 0; BINFO_BASE_ITERATE (binfo, i, t); ++i)
3621 : {
3622 25200964 : tree btype = BINFO_TYPE (t);
3623 25200964 : int subvis = type_visibility (btype);
3624 :
3625 25200964 : if (subvis == VISIBILITY_ANON)
3626 : {
3627 33 : if (!in_main_input_context())
3628 : {
3629 18 : tree nlt = no_linkage_check (btype, /*relaxed_p=*/false);
3630 18 : if (nlt)
3631 : {
3632 6 : if (same_type_p (btype, nlt))
3633 6 : warning (OPT_Wsubobject_linkage, "\
3634 : %qT has a base %qT which has no linkage",
3635 : type, btype);
3636 : else
3637 0 : warning (OPT_Wsubobject_linkage, "\
3638 : %qT has a base %qT which depends on the type %qT which has no linkage",
3639 : type, btype, nlt);
3640 : }
3641 12 : else if (cxx_dialect > cxx98
3642 12 : && !decl_anon_ns_mem_p (btype))
3643 3 : warning (OPT_Wsubobject_linkage, "\
3644 : %qT has a base %qT which has internal linkage",
3645 : type, btype);
3646 : else // In C++98 this can only happen with unnamed namespaces.
3647 9 : warning (OPT_Wsubobject_linkage, "\
3648 : %qT has a base %qT which uses the anonymous namespace",
3649 : type, btype);
3650 : }
3651 : }
3652 25200931 : else if (vis < VISIBILITY_HIDDEN
3653 25200931 : && subvis >= VISIBILITY_HIDDEN)
3654 6 : warning (OPT_Wattributes, "\
3655 : %qT declared with greater visibility than its base %qT",
3656 6 : type, TREE_TYPE (t));
3657 : }
3658 : }
3659 :
3660 : /* Functions for adjusting the visibility of a tagged type and its nested
3661 : types and declarations when it gets a name for linkage purposes from a
3662 : typedef. */
3663 : // FIXME: It is now a DR for such a class type to contain anything
3664 : // other than C. So at minimum most of this can probably be deleted.
3665 :
3666 : /* First reset the visibility of all the types. */
3667 :
3668 : static void
3669 1139636 : reset_type_linkage_1 (tree type)
3670 : {
3671 1139636 : set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
3672 1139636 : if (CLASS_TYPE_P (type))
3673 3804405 : for (tree member = TYPE_FIELDS (type); member; member = DECL_CHAIN (member))
3674 3022422 : if (DECL_IMPLICIT_TYPEDEF_P (member))
3675 242044 : reset_type_linkage_1 (TREE_TYPE (member));
3676 1139636 : }
3677 :
3678 : /* Then reset the visibility of any static data members or member
3679 : functions that use those types. */
3680 :
3681 : static void
3682 103 : reset_decl_linkage (tree decl)
3683 : {
3684 103 : if (TREE_PUBLIC (decl))
3685 : return;
3686 103 : if (DECL_CLONED_FUNCTION_P (decl))
3687 : return;
3688 99 : TREE_PUBLIC (decl) = true;
3689 99 : DECL_INTERFACE_KNOWN (decl) = false;
3690 99 : determine_visibility (decl);
3691 99 : tentative_decl_linkage (decl);
3692 : }
3693 :
3694 : void
3695 897592 : reset_type_linkage (tree type)
3696 : {
3697 897592 : reset_type_linkage_1 (type);
3698 897592 : if (CLASS_TYPE_P (type))
3699 : {
3700 539951 : if (tree vt = CLASSTYPE_VTABLES (type))
3701 : {
3702 15 : tree name = mangle_vtbl_for_type (type);
3703 15 : DECL_NAME (vt) = name;
3704 15 : SET_DECL_ASSEMBLER_NAME (vt, name);
3705 15 : reset_decl_linkage (vt);
3706 : }
3707 539951 : if (!ANON_AGGR_TYPE_P (type))
3708 539814 : if (tree ti = CLASSTYPE_TYPEINFO_VAR (type))
3709 : {
3710 12 : tree name = mangle_typeinfo_for_type (type);
3711 12 : DECL_NAME (ti) = name;
3712 12 : SET_DECL_ASSEMBLER_NAME (ti, name);
3713 12 : TREE_TYPE (name) = type;
3714 12 : reset_decl_linkage (ti);
3715 : }
3716 2531579 : for (tree m = TYPE_FIELDS (type); m; m = DECL_CHAIN (m))
3717 : {
3718 1991628 : tree mem = STRIP_TEMPLATE (m);
3719 1991628 : if (TREE_CODE (mem) == VAR_DECL || TREE_CODE (mem) == FUNCTION_DECL)
3720 76 : reset_decl_linkage (mem);
3721 1991552 : else if (DECL_IMPLICIT_TYPEDEF_P (mem))
3722 127716 : reset_type_linkage (TREE_TYPE (mem));
3723 : }
3724 : }
3725 897592 : }
3726 :
3727 : /* Set up our initial idea of what the linkage of DECL should be. */
3728 :
3729 : void
3730 31996931 : tentative_decl_linkage (tree decl)
3731 : {
3732 31996931 : if (DECL_INTERFACE_KNOWN (decl))
3733 : /* We've already made a decision as to how this function will
3734 : be handled. */;
3735 31995795 : else if (vague_linkage_p (decl))
3736 : {
3737 31995183 : if (TREE_CODE (decl) == FUNCTION_DECL
3738 31995183 : && decl_defined_p (decl))
3739 : {
3740 31971825 : DECL_EXTERNAL (decl) = 1;
3741 31971825 : DECL_NOT_REALLY_EXTERN (decl) = 1;
3742 31971825 : note_vague_linkage_fn (decl);
3743 : /* A non-template inline function with external linkage will
3744 : always be COMDAT. As we must eventually determine the
3745 : linkage of all functions, and as that causes writes to
3746 : the data mapped in from the PCH file, it's advantageous
3747 : to mark the functions at this point. */
3748 31971825 : if (DECL_DECLARED_INLINE_P (decl))
3749 : {
3750 31969275 : if (!DECL_IMPLICIT_INSTANTIATION (decl)
3751 31969275 : || DECL_DEFAULTED_FN (decl))
3752 : {
3753 : /* This function must have external linkage, as
3754 : otherwise DECL_INTERFACE_KNOWN would have been
3755 : set. */
3756 26376079 : gcc_assert (TREE_PUBLIC (decl));
3757 26376079 : comdat_linkage (decl);
3758 26376079 : DECL_INTERFACE_KNOWN (decl) = 1;
3759 : }
3760 5593196 : else if (DECL_MAYBE_IN_CHARGE_CDTOR_P (decl))
3761 : /* For implicit instantiations of cdtors try to make
3762 : it comdat, so that maybe_clone_body can use aliases.
3763 : See PR113208. */
3764 721191 : maybe_make_one_only (decl);
3765 : }
3766 : }
3767 23358 : else if (VAR_P (decl))
3768 23356 : maybe_commonize_var (decl);
3769 : }
3770 31996931 : }
3771 :
3772 : /* For a polymorphic class type CTYPE, whether its vtables are emitted in a
3773 : unique object as per the ABI. */
3774 :
3775 : static bool
3776 2851 : vtables_uniquely_emitted (tree ctype)
3777 : {
3778 : /* If the class is templated, the tables are emitted in every object that
3779 : references any of them. */
3780 2851 : if (CLASSTYPE_USE_TEMPLATE (ctype))
3781 : return false;
3782 :
3783 : /* Otherwise, if the class is attached to a module, the tables are uniquely
3784 : emitted in the object for the module unit in which it is defined. */
3785 2225 : tree cdecl = TYPE_NAME (ctype);
3786 2360 : if (DECL_LANG_SPECIFIC (cdecl) && DECL_MODULE_ATTACH_P (cdecl))
3787 : return true;
3788 :
3789 : /* Otherwise, if the class has a key function, the tables are emitted in the
3790 : object for the TU containing the definition of the key function. This is
3791 : unique if the key function is not inline. */
3792 2093 : tree key_method = CLASSTYPE_KEY_METHOD (ctype);
3793 4166 : if (key_method && !DECL_NONGNU_INLINE_P (key_method))
3794 2053 : return true;
3795 :
3796 : /* Otherwise, the tables are emitted in every object that references
3797 : any of them. */
3798 : return false;
3799 : }
3800 :
3801 : /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
3802 : for DECL has not already been determined, do so now by setting
3803 : DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
3804 : function is called entities with vague linkage whose definitions
3805 : are available must have TREE_PUBLIC set.
3806 :
3807 : If this function decides to place DECL in COMDAT, it will set
3808 : appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
3809 : the caller to decide whether or not to clear DECL_EXTERNAL. Some
3810 : callers defer that decision until it is clear that DECL is actually
3811 : required. */
3812 :
3813 : void
3814 242129499 : import_export_decl (tree decl)
3815 : {
3816 242129499 : bool comdat_p;
3817 242129499 : bool import_p;
3818 242129499 : tree class_type = NULL_TREE;
3819 :
3820 242129499 : if (DECL_INTERFACE_KNOWN (decl))
3821 : return;
3822 :
3823 : /* We cannot determine what linkage to give to an entity with vague
3824 : linkage until the end of the file. For example, a virtual table
3825 : for a class will be defined if and only if the key method is
3826 : defined in this translation unit. */
3827 42129385 : gcc_assert (at_eof);
3828 : /* Object file linkage for explicit instantiations is handled in
3829 : mark_decl_instantiated. For static variables in functions with
3830 : vague linkage, maybe_commonize_var is used.
3831 :
3832 : Therefore, the only declarations that should be provided to this
3833 : function are those with external linkage that are:
3834 :
3835 : * implicit instantiations of function templates
3836 :
3837 : * inline functions
3838 :
3839 : * inline variables
3840 :
3841 : * implicit instantiations of static data members of class
3842 : templates
3843 :
3844 : * virtual tables
3845 :
3846 : * typeinfo objects
3847 :
3848 : Furthermore, all entities that reach this point must have a
3849 : definition available in this translation unit.
3850 :
3851 : The following assertions check these conditions. */
3852 42129385 : gcc_assert (VAR_OR_FUNCTION_DECL_P (decl));
3853 : /* Any code that creates entities with TREE_PUBLIC cleared should
3854 : also set DECL_INTERFACE_KNOWN. */
3855 42129385 : gcc_assert (TREE_PUBLIC (decl));
3856 42129385 : if (TREE_CODE (decl) == FUNCTION_DECL)
3857 22631809 : gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
3858 : || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
3859 : || DECL_DECLARED_INLINE_P (decl));
3860 : else
3861 19497576 : gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
3862 : || DECL_INLINE_VAR_P (decl)
3863 : || DECL_VTABLE_OR_VTT_P (decl)
3864 : || DECL_TINFO_P (decl));
3865 : /* Check that a definition of DECL is available in this translation
3866 : unit. */
3867 42129385 : gcc_assert (!DECL_REALLY_EXTERN (decl));
3868 :
3869 : /* Assume that DECL will not have COMDAT linkage. */
3870 42129385 : comdat_p = false;
3871 : /* Assume that DECL will not be imported into this translation
3872 : unit. */
3873 42129385 : import_p = false;
3874 :
3875 42129385 : if (VAR_P (decl) && DECL_VTABLE_OR_VTT_P (decl))
3876 : {
3877 1689723 : class_type = DECL_CONTEXT (decl);
3878 1689723 : import_export_class (class_type);
3879 1689723 : if (CLASSTYPE_INTERFACE_KNOWN (class_type)
3880 1689723 : && CLASSTYPE_INTERFACE_ONLY (class_type))
3881 : import_p = true;
3882 541403 : else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
3883 541403 : && !vtables_uniquely_emitted (class_type))
3884 : /* The ABI historically required that all virtual tables be
3885 : emitted with COMDAT linkage. However, on systems where
3886 : COMDAT symbols don't show up in the table of contents for
3887 : a static archive, or on systems without weak symbols (where
3888 : we approximate COMDAT linkage by using internal linkage),
3889 : the linker will report errors about undefined symbols because
3890 : it will not see the virtual table definition. Therefore,
3891 : in the case that we know that the virtual table will be
3892 : emitted in only one translation unit, we make the virtual
3893 : table an ordinary definition with external linkage. */
3894 3 : DECL_EXTERNAL (decl) = 0;
3895 541400 : else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
3896 : {
3897 : /* CLASS_TYPE is being exported from this translation unit,
3898 : so DECL should be defined here. */
3899 2848 : if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
3900 : /* If a class is declared in a header with the "extern
3901 : template" extension, then it will not be instantiated,
3902 : even in translation units that would normally require
3903 : it. Often such classes are explicitly instantiated in
3904 : one translation unit. Therefore, the explicit
3905 : instantiation must be made visible to other translation
3906 : units. */
3907 0 : DECL_EXTERNAL (decl) = 0;
3908 : else
3909 : {
3910 : /* The generic C++ ABI used to say that class data is always
3911 : COMDAT, even if emitted in a unique object. This is no
3912 : longer true, but for now we continue to do so for
3913 : compatibility with programs that are not strictly valid.
3914 : However, some variants (e.g., the ARM EABI) explicitly say
3915 : that class data only has COMDAT linkage if the class data
3916 : might be emitted in more than one translation unit.
3917 : When the key method can be inline and is inline, we still
3918 : have to arrange for comdat even though
3919 : class_data_always_comdat is false. */
3920 2848 : if (!vtables_uniquely_emitted (class_type)
3921 2848 : || targetm.cxx.class_data_always_comdat ())
3922 : {
3923 : /* The ABI requires COMDAT linkage. Normally, we
3924 : only emit COMDAT things when they are needed;
3925 : make sure that we realize that this entity is
3926 : indeed needed. */
3927 2848 : comdat_p = true;
3928 2848 : mark_needed (decl);
3929 : }
3930 : }
3931 : }
3932 538552 : else if (!flag_implicit_templates
3933 538552 : && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
3934 : import_p = true;
3935 : else
3936 : comdat_p = true;
3937 : }
3938 40439662 : else if (VAR_P (decl) && DECL_TINFO_P (decl))
3939 : {
3940 2354500 : tree type = TREE_TYPE (DECL_NAME (decl));
3941 2354500 : if (CLASS_TYPE_P (type))
3942 : {
3943 2351727 : class_type = type;
3944 2351727 : import_export_class (type);
3945 2351727 : if (CLASSTYPE_INTERFACE_KNOWN (type)
3946 1305854 : && TYPE_CONTAINS_VPTR_P (type)
3947 1305764 : && CLASSTYPE_INTERFACE_ONLY (type)
3948 : /* If -fno-rtti was specified, then we cannot be sure
3949 : that RTTI information will be emitted with the
3950 : virtual table of the class, so we must emit it
3951 : wherever it is used. */
3952 3653577 : && flag_rtti)
3953 : import_p = true;
3954 : else
3955 : {
3956 1049923 : if (CLASSTYPE_INTERFACE_KNOWN (type)
3957 1049923 : && !CLASSTYPE_INTERFACE_ONLY (type))
3958 : {
3959 3944 : comdat_p = (targetm.cxx.class_data_always_comdat ()
3960 3944 : || !vtables_uniquely_emitted (class_type));
3961 3944 : mark_needed (decl);
3962 3944 : if (!flag_weak)
3963 : {
3964 0 : comdat_p = false;
3965 0 : DECL_EXTERNAL (decl) = 0;
3966 : }
3967 : }
3968 : else
3969 : comdat_p = true;
3970 : }
3971 : }
3972 : else
3973 : comdat_p = true;
3974 : }
3975 38085162 : else if (DECL_TEMPLOID_INSTANTIATION (decl))
3976 : {
3977 : /* DECL is an implicit instantiation of a function or static
3978 : data member. */
3979 37827901 : if (flag_implicit_templates
3980 37827901 : || (flag_implicit_inline_templates
3981 21124 : && TREE_CODE (decl) == FUNCTION_DECL
3982 16899 : && DECL_DECLARED_INLINE_P (decl)))
3983 : comdat_p = true;
3984 : else
3985 : /* If we are not implicitly generating templates, then mark
3986 : this entity as undefined in this translation unit. */
3987 : import_p = true;
3988 : }
3989 257261 : else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_FUNCTION_MEMBER_P (decl))
3990 : {
3991 248235 : if (!DECL_NONGNU_INLINE_P (decl))
3992 : {
3993 0 : tree ctype = DECL_CONTEXT (decl);
3994 0 : import_export_class (ctype);
3995 0 : if (CLASSTYPE_INTERFACE_KNOWN (ctype))
3996 : {
3997 0 : DECL_NOT_REALLY_EXTERN (decl)
3998 0 : = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
3999 0 : || (DECL_DECLARED_INLINE_P (decl)
4000 0 : && ! flag_implement_inlines
4001 0 : && !DECL_VINDEX (decl)));
4002 :
4003 0 : if (!DECL_NOT_REALLY_EXTERN (decl))
4004 0 : DECL_EXTERNAL (decl) = 1;
4005 :
4006 : /* Always make artificials weak. */
4007 0 : if (DECL_ARTIFICIAL (decl) && flag_weak)
4008 : comdat_p = true;
4009 : else
4010 0 : maybe_make_one_only (decl);
4011 : }
4012 : }
4013 : else
4014 : comdat_p = true;
4015 : }
4016 : else
4017 : comdat_p = true;
4018 :
4019 2851 : if (import_p)
4020 : {
4021 : /* If we are importing DECL into this translation unit, mark is
4022 : an undefined here. */
4023 2457728 : DECL_EXTERNAL (decl) = 1;
4024 2457728 : DECL_NOT_REALLY_EXTERN (decl) = 0;
4025 : }
4026 39671657 : else if (comdat_p)
4027 : {
4028 : /* If we decided to put DECL in COMDAT, mark it accordingly at
4029 : this point. */
4030 39671654 : comdat_linkage (decl);
4031 : }
4032 :
4033 42129385 : DECL_INTERFACE_KNOWN (decl) = 1;
4034 : }
4035 :
4036 : /* Return an expression that performs the destruction of DECL, which
4037 : must be a VAR_DECL whose type has a non-trivial destructor, or is
4038 : an array whose (innermost) elements have a non-trivial destructor. */
4039 :
4040 : tree
4041 1386 : build_cleanup (tree decl)
4042 : {
4043 1386 : tree clean = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
4044 1386 : gcc_assert (clean != NULL_TREE);
4045 1386 : return clean;
4046 : }
4047 :
4048 : /* GUARD is a helper variable for DECL; make them have the same linkage and
4049 : visibility. */
4050 :
4051 : void
4052 77880 : copy_linkage (tree guard, tree decl)
4053 : {
4054 77880 : TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
4055 77880 : TREE_STATIC (guard) = TREE_STATIC (decl);
4056 77880 : DECL_COMMON (guard) = DECL_COMMON (decl);
4057 77880 : DECL_COMDAT (guard) = DECL_COMDAT (decl);
4058 77880 : if (TREE_STATIC (guard))
4059 : {
4060 6607 : CP_DECL_THREAD_LOCAL_P (guard) = CP_DECL_THREAD_LOCAL_P (decl);
4061 6607 : set_decl_tls_model (guard, DECL_TLS_MODEL (decl));
4062 6607 : if (DECL_ONE_ONLY (decl))
4063 4599 : make_decl_one_only (guard, cxx_comdat_group (guard));
4064 6607 : if (TREE_PUBLIC (decl))
4065 5379 : DECL_WEAK (guard) = DECL_WEAK (decl);
4066 : /* Also check vague_linkage_p, as DECL_WEAK and DECL_ONE_ONLY might not
4067 : be set until import_export_decl at EOF. */
4068 6607 : if (vague_linkage_p (decl))
4069 4617 : comdat_linkage (guard);
4070 6607 : DECL_VISIBILITY (guard) = DECL_VISIBILITY (decl);
4071 6607 : DECL_VISIBILITY_SPECIFIED (guard) = DECL_VISIBILITY_SPECIFIED (decl);
4072 6607 : if (!TREE_PUBLIC (decl))
4073 : {
4074 1228 : gcc_checking_assert (DECL_INTERFACE_KNOWN (decl));
4075 1228 : DECL_INTERFACE_KNOWN (guard) = 1;
4076 1228 : if (DECL_LANG_SPECIFIC (decl) && DECL_LANG_SPECIFIC (guard))
4077 248 : DECL_NOT_REALLY_EXTERN (guard) = DECL_NOT_REALLY_EXTERN (decl);
4078 : }
4079 : }
4080 77880 : }
4081 :
4082 : /* Returns the initialization guard variable for the variable DECL,
4083 : which has static storage duration. */
4084 :
4085 : tree
4086 5004 : get_guard (tree decl)
4087 : {
4088 5004 : tree sname = mangle_guard_variable (decl);
4089 5004 : tree guard = get_global_binding (sname);
4090 5004 : if (! guard)
4091 : {
4092 5004 : tree guard_type;
4093 :
4094 : /* We use a type that is big enough to contain a mutex as well
4095 : as an integer counter. */
4096 5004 : guard_type = targetm.cxx.guard_type ();
4097 5004 : guard = build_decl (DECL_SOURCE_LOCATION (decl),
4098 : VAR_DECL, sname, guard_type);
4099 :
4100 : /* The guard should have the same linkage as what it guards. */
4101 5004 : copy_linkage (guard, decl);
4102 :
4103 5004 : DECL_ARTIFICIAL (guard) = 1;
4104 5004 : DECL_IGNORED_P (guard) = 1;
4105 5004 : TREE_USED (guard) = 1;
4106 5004 : pushdecl_top_level_and_finish (guard, NULL_TREE);
4107 : }
4108 5004 : return guard;
4109 : }
4110 :
4111 : /* Returns true if accessing the GUARD atomic is expensive,
4112 : i.e. involves a call to __sync_synchronize or similar.
4113 : In this case let __cxa_guard_acquire handle the atomics. */
4114 :
4115 : static bool
4116 3878 : is_atomic_expensive_p (machine_mode mode)
4117 : {
4118 3878 : if (!flag_inline_atomics)
4119 : return true;
4120 :
4121 3878 : if (!can_compare_and_swap_p (mode, false) || !can_atomic_load_p (mode))
4122 0 : return true;
4123 :
4124 : return false;
4125 : }
4126 :
4127 : /* Return an atomic load of src with the appropriate memory model. */
4128 :
4129 : static tree
4130 3878 : build_atomic_load_type (tree src, HOST_WIDE_INT model, tree type)
4131 : {
4132 3878 : tree ptr_type = build_pointer_type (type);
4133 3878 : tree mem_model = build_int_cst (integer_type_node, model);
4134 3878 : tree t, addr, val;
4135 3878 : unsigned int size;
4136 3878 : int fncode;
4137 :
4138 3878 : size = tree_to_uhwi (TYPE_SIZE_UNIT (type));
4139 :
4140 3878 : fncode = BUILT_IN_ATOMIC_LOAD_N + exact_log2 (size) + 1;
4141 3878 : t = builtin_decl_implicit ((enum built_in_function) fncode);
4142 :
4143 3878 : addr = build1 (ADDR_EXPR, ptr_type, src);
4144 3878 : val = build_call_expr (t, 2, addr, mem_model);
4145 3878 : return val;
4146 : }
4147 :
4148 : /* Return those bits of the GUARD variable that should be set when the
4149 : guarded entity is actually initialized. */
4150 :
4151 : static tree
4152 2252 : get_guard_bits (tree guard)
4153 : {
4154 2252 : if (!targetm.cxx.guard_mask_bit ())
4155 : {
4156 : /* We only set the first byte of the guard, in order to leave room
4157 : for a mutex in the high-order bits. */
4158 2252 : guard = build1 (ADDR_EXPR,
4159 2252 : build_pointer_type (TREE_TYPE (guard)),
4160 : guard);
4161 2252 : guard = build1 (NOP_EXPR,
4162 : build_pointer_type (char_type_node),
4163 : guard);
4164 2252 : guard = build1 (INDIRECT_REF, char_type_node, guard);
4165 : }
4166 :
4167 2252 : return guard;
4168 : }
4169 :
4170 : /* Return an expression which determines whether or not the GUARD
4171 : variable has already been initialized. */
4172 :
4173 : tree
4174 5004 : get_guard_cond (tree guard, bool thread_safe)
4175 : {
4176 5004 : tree guard_value;
4177 :
4178 5004 : if (!thread_safe)
4179 1126 : guard = get_guard_bits (guard);
4180 : else
4181 : {
4182 3878 : tree type = targetm.cxx.guard_mask_bit ()
4183 3878 : ? TREE_TYPE (guard) : char_type_node;
4184 :
4185 3878 : if (is_atomic_expensive_p (TYPE_MODE (type)))
4186 0 : guard = integer_zero_node;
4187 : else
4188 3878 : guard = build_atomic_load_type (guard, MEMMODEL_ACQUIRE, type);
4189 : }
4190 :
4191 : /* Mask off all but the low bit. */
4192 5004 : if (targetm.cxx.guard_mask_bit ())
4193 : {
4194 0 : guard_value = integer_one_node;
4195 0 : if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
4196 0 : guard_value = fold_convert (TREE_TYPE (guard), guard_value);
4197 0 : guard = cp_build_binary_op (input_location,
4198 : BIT_AND_EXPR, guard, guard_value,
4199 : tf_warning_or_error);
4200 : }
4201 :
4202 5004 : guard_value = integer_zero_node;
4203 5004 : if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
4204 5004 : guard_value = fold_convert (TREE_TYPE (guard), guard_value);
4205 5004 : return cp_build_binary_op (input_location,
4206 : EQ_EXPR, guard, guard_value,
4207 5004 : tf_warning_or_error);
4208 : }
4209 :
4210 : /* Return an expression which sets the GUARD variable, indicating that
4211 : the variable being guarded has been initialized. */
4212 :
4213 : tree
4214 1126 : set_guard (tree guard)
4215 : {
4216 1126 : tree guard_init;
4217 :
4218 : /* Set the GUARD to one. */
4219 1126 : guard = get_guard_bits (guard);
4220 1126 : guard_init = integer_one_node;
4221 1126 : if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
4222 1126 : guard_init = fold_convert (TREE_TYPE (guard), guard_init);
4223 1126 : return cp_build_modify_expr (input_location, guard, NOP_EXPR, guard_init,
4224 1126 : tf_warning_or_error);
4225 : }
4226 :
4227 : /* Returns true iff we can tell that VAR does not have a dynamic
4228 : initializer. */
4229 :
4230 : static bool
4231 2590 : var_defined_without_dynamic_init (tree var)
4232 : {
4233 : /* constinit vars are guaranteed to not have dynamic initializer,
4234 : but still registering the destructor counts as dynamic initialization. */
4235 2590 : if (DECL_DECLARED_CONSTINIT_P (var)
4236 24 : && COMPLETE_TYPE_P (TREE_TYPE (var))
4237 2608 : && !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (var)))
4238 : return true;
4239 : /* If it's defined in another TU, we can't tell. */
4240 2578 : if (DECL_EXTERNAL (var))
4241 : return false;
4242 : /* If it has a non-trivial destructor, registering the destructor
4243 : counts as dynamic initialization. */
4244 2331 : if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (var)))
4245 : return false;
4246 : /* If it's in this TU, its initializer has been processed, unless
4247 : it's a case of self-initialization, then DECL_INITIALIZED_P is
4248 : false while the initializer is handled by finish_id_expression. */
4249 2150 : if (!DECL_INITIALIZED_P (var))
4250 : return false;
4251 : /* If it has no initializer or a constant one, it's not dynamic. */
4252 2144 : return (!DECL_NONTRIVIALLY_INITIALIZED_P (var)
4253 2144 : || DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (var));
4254 : }
4255 :
4256 : /* Returns true iff VAR is a variable that needs uses to be
4257 : wrapped for possible dynamic initialization. */
4258 :
4259 : bool
4260 78385 : var_needs_tls_wrapper (tree var)
4261 : {
4262 78385 : return (!error_operand_p (var)
4263 78382 : && CP_DECL_THREAD_LOCAL_P (var)
4264 78382 : && !DECL_GNU_TLS_P (var)
4265 2728 : && !DECL_FUNCTION_SCOPE_P (var)
4266 80975 : && !var_defined_without_dynamic_init (var));
4267 : }
4268 :
4269 : /* Get the FUNCTION_DECL for the shared TLS init function for this
4270 : translation unit. */
4271 :
4272 : static tree
4273 195 : get_local_tls_init_fn (location_t loc)
4274 : {
4275 195 : tree sname = get_identifier ("__tls_init");
4276 195 : tree fn = get_global_binding (sname);
4277 195 : if (!fn)
4278 : {
4279 123 : fn = build_lang_decl_loc (loc, FUNCTION_DECL, sname,
4280 : build_function_type (void_type_node,
4281 : void_list_node));
4282 123 : SET_DECL_LANGUAGE (fn, lang_c);
4283 123 : TREE_PUBLIC (fn) = false;
4284 123 : DECL_ARTIFICIAL (fn) = true;
4285 123 : mark_used (fn);
4286 123 : set_global_binding (fn);
4287 : }
4288 195 : return fn;
4289 : }
4290 :
4291 : /* Get a FUNCTION_DECL for the init function for the thread_local
4292 : variable VAR. The init function will be an alias to the function
4293 : that initializes all the non-local TLS variables in the translation
4294 : unit. The init function is only used by the wrapper function. */
4295 :
4296 : static tree
4297 1282 : get_tls_init_fn (tree var)
4298 : {
4299 : /* Only C++11 TLS vars need this init fn. */
4300 1282 : if (!var_needs_tls_wrapper (var))
4301 : return NULL_TREE;
4302 :
4303 : /* If -fno-extern-tls-init, assume that we don't need to call
4304 : a tls init function for a variable defined in another TU. */
4305 1263 : if (!flag_extern_tls_init && DECL_EXTERNAL (var))
4306 : return NULL_TREE;
4307 :
4308 : /* If the variable is internal, or if we can't generate aliases,
4309 : call the local init function directly. */
4310 1262 : if (!TREE_PUBLIC (var) || !TARGET_SUPPORTS_ALIASES)
4311 72 : return get_local_tls_init_fn (DECL_SOURCE_LOCATION (var));
4312 :
4313 1190 : tree sname = mangle_tls_init_fn (var);
4314 1190 : tree fn = get_global_binding (sname);
4315 1190 : if (!fn)
4316 : {
4317 765 : fn = build_lang_decl (FUNCTION_DECL, sname,
4318 : build_function_type (void_type_node,
4319 : void_list_node));
4320 765 : SET_DECL_LANGUAGE (fn, lang_c);
4321 765 : TREE_PUBLIC (fn) = TREE_PUBLIC (var);
4322 765 : DECL_ARTIFICIAL (fn) = true;
4323 765 : DECL_CONTEXT (fn) = FROB_CONTEXT (global_namespace);
4324 765 : DECL_COMDAT (fn) = DECL_COMDAT (var);
4325 765 : DECL_EXTERNAL (fn) = DECL_EXTERNAL (var);
4326 765 : if (DECL_ONE_ONLY (var))
4327 3 : make_decl_one_only (fn, cxx_comdat_group (fn));
4328 765 : if (TREE_PUBLIC (var))
4329 : {
4330 765 : tree obtype = strip_array_types (non_reference (TREE_TYPE (var)));
4331 : /* If the variable is defined somewhere else and might have static
4332 : initialization, make the init function a weak reference. */
4333 765 : if ((!TYPE_NEEDS_CONSTRUCTING (obtype)
4334 603 : || TYPE_HAS_CONSTEXPR_CTOR (obtype)
4335 585 : || TYPE_HAS_TRIVIAL_DFLT (obtype))
4336 180 : && TYPE_HAS_TRIVIAL_DESTRUCTOR (obtype)
4337 927 : && DECL_EXTERNAL (var))
4338 51 : declare_weak (fn);
4339 : else
4340 714 : DECL_WEAK (fn) = DECL_WEAK (var);
4341 : }
4342 765 : DECL_VISIBILITY (fn) = DECL_VISIBILITY (var);
4343 765 : DECL_VISIBILITY_SPECIFIED (fn) = DECL_VISIBILITY_SPECIFIED (var);
4344 765 : DECL_DLLIMPORT_P (fn) = DECL_DLLIMPORT_P (var);
4345 765 : DECL_IGNORED_P (fn) = 1;
4346 765 : mark_used (fn);
4347 :
4348 765 : DECL_BEFRIENDING_CLASSES (fn) = var;
4349 :
4350 765 : set_global_binding (fn);
4351 : }
4352 : return fn;
4353 : }
4354 :
4355 : /* Get a FUNCTION_DECL for the init wrapper function for the thread_local
4356 : variable VAR. The wrapper function calls the init function (if any) for
4357 : VAR and then returns a reference to VAR. The wrapper function is used
4358 : in place of VAR everywhere VAR is mentioned. */
4359 :
4360 : static tree
4361 77088 : get_tls_wrapper_fn (tree var)
4362 : {
4363 : /* Only C++11 TLS vars need this wrapper fn. */
4364 77088 : if (!var_needs_tls_wrapper (var))
4365 : return NULL_TREE;
4366 :
4367 749 : tree sname = mangle_tls_wrapper_fn (var);
4368 749 : tree fn = get_global_binding (sname);
4369 749 : if (!fn)
4370 : {
4371 : /* A named rvalue reference is an lvalue, so the wrapper should
4372 : always return an lvalue reference. */
4373 586 : tree type = non_reference (TREE_TYPE (var));
4374 586 : type = build_reference_type (type);
4375 586 : tree fntype = build_function_type (type, void_list_node);
4376 :
4377 586 : fn = build_lang_decl_loc (DECL_SOURCE_LOCATION (var),
4378 : FUNCTION_DECL, sname, fntype);
4379 586 : SET_DECL_LANGUAGE (fn, lang_c);
4380 586 : TREE_PUBLIC (fn) = TREE_PUBLIC (var);
4381 586 : DECL_ARTIFICIAL (fn) = true;
4382 586 : DECL_IGNORED_P (fn) = 1;
4383 586 : DECL_CONTEXT (fn) = FROB_CONTEXT (global_namespace);
4384 : /* The wrapper is inline and emitted everywhere var is used. */
4385 586 : DECL_DECLARED_INLINE_P (fn) = true;
4386 586 : if (TREE_PUBLIC (var))
4387 : {
4388 514 : comdat_linkage (fn);
4389 : #ifdef HAVE_GAS_HIDDEN
4390 : /* Make the wrapper bind locally; there's no reason to share
4391 : the wrapper between multiple shared objects. */
4392 514 : DECL_VISIBILITY (fn) = VISIBILITY_INTERNAL;
4393 514 : DECL_VISIBILITY_SPECIFIED (fn) = true;
4394 : #endif
4395 : }
4396 586 : if (!TREE_PUBLIC (fn))
4397 72 : DECL_INTERFACE_KNOWN (fn) = true;
4398 586 : mark_used (fn);
4399 586 : note_vague_linkage_fn (fn);
4400 :
4401 : #if 0
4402 : /* We want CSE to commonize calls to the wrapper, but marking it as
4403 : pure is unsafe since it has side-effects. I guess we need a new
4404 : ECF flag even weaker than ECF_PURE. FIXME! */
4405 : DECL_PURE_P (fn) = true;
4406 : #endif
4407 :
4408 586 : DECL_BEFRIENDING_CLASSES (fn) = var;
4409 :
4410 586 : set_global_binding (fn);
4411 : }
4412 : return fn;
4413 : }
4414 :
4415 : /* If EXPR is a thread_local variable that should be wrapped by init
4416 : wrapper function, return a call to that function, otherwise return
4417 : NULL. */
4418 :
4419 : tree
4420 1017692975 : maybe_get_tls_wrapper_call (tree expr)
4421 : {
4422 1017692975 : if (VAR_P (expr)
4423 350517870 : && !processing_template_decl
4424 146988964 : && !cp_unevaluated_operand
4425 1162805123 : && CP_DECL_THREAD_LOCAL_P (expr))
4426 77088 : if (tree wrap = get_tls_wrapper_fn (expr))
4427 749 : return build_cxx_call (wrap, 0, NULL, tf_warning_or_error);
4428 : return NULL;
4429 : }
4430 :
4431 : /* At EOF, generate the definition for the TLS wrapper function FN:
4432 :
4433 : T& var_wrapper() {
4434 : if (init_fn) init_fn();
4435 : return var;
4436 : } */
4437 :
4438 : static void
4439 586 : generate_tls_wrapper (tree fn)
4440 : {
4441 586 : tree var = DECL_BEFRIENDING_CLASSES (fn);
4442 :
4443 586 : start_preparsed_function (fn, NULL_TREE, SF_DEFAULT | SF_PRE_PARSED);
4444 586 : tree body = begin_function_body ();
4445 : /* Only call the init fn if there might be one. */
4446 586 : if (tree init_fn = get_tls_init_fn (var))
4447 : {
4448 566 : tree if_stmt = NULL_TREE;
4449 : /* If init_fn is a weakref, make sure it exists before calling. */
4450 566 : if (lookup_attribute ("weak", DECL_ATTRIBUTES (init_fn)))
4451 : {
4452 51 : if_stmt = begin_if_stmt ();
4453 51 : tree addr = cp_build_addr_expr (init_fn, tf_warning_or_error);
4454 51 : tree cond = cp_build_binary_op (DECL_SOURCE_LOCATION (var),
4455 : NE_EXPR, addr, nullptr_node,
4456 : tf_warning_or_error);
4457 51 : finish_if_stmt_cond (cond, if_stmt);
4458 : }
4459 566 : finish_expr_stmt (build_cxx_call
4460 : (init_fn, 0, NULL, tf_warning_or_error));
4461 566 : if (if_stmt)
4462 : {
4463 51 : finish_then_clause (if_stmt);
4464 51 : finish_if_stmt (if_stmt);
4465 : }
4466 : }
4467 : else
4468 : /* If there's no initialization, the wrapper is a constant function. */
4469 20 : TREE_READONLY (fn) = true;
4470 586 : finish_return_stmt (convert_from_reference (var));
4471 586 : finish_function_body (body);
4472 586 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
4473 586 : }
4474 :
4475 : /* Start a global constructor or destructor function. */
4476 :
4477 : static tree
4478 7661 : start_objects (bool initp, unsigned priority, bool has_body,
4479 : bool omp_target = false)
4480 : {
4481 7661 : bool default_init = initp && priority == DEFAULT_INIT_PRIORITY;
4482 : /* FIXME: We may eventually want to treat OpenMP offload initializers
4483 : in modules specially as well. */
4484 7661 : bool is_module_init = (default_init
4485 7661 : && !omp_target
4486 7661 : && module_global_init_needed ());
4487 7661 : tree name = NULL_TREE;
4488 :
4489 7661 : if (is_module_init)
4490 2014 : name = mangle_module_global_init (0);
4491 : else
4492 : {
4493 5647 : char type[14];
4494 :
4495 : /* We use `I' to indicate initialization and `D' to indicate
4496 : destruction. */
4497 5647 : unsigned len;
4498 5647 : if (omp_target)
4499 : /* Use "off_" signifying "offload" here. The name must be distinct
4500 : from the non-offload case. The format of the name is scanned in
4501 : tree.cc/get_file_function_name, so stick to the same length for
4502 : both name variants. */
4503 15 : len = sprintf (type, "off_%c", initp ? 'I' : 'D');
4504 : else
4505 5641 : len = sprintf (type, "sub_%c", initp ? 'I' : 'D');
4506 5647 : if (priority != DEFAULT_INIT_PRIORITY)
4507 : {
4508 40 : char joiner = '_';
4509 : #ifdef JOINER
4510 40 : joiner = JOINER;
4511 : #endif
4512 40 : type[len++] = joiner;
4513 40 : sprintf (type + len, "%.5u", priority);
4514 : }
4515 5647 : name = get_file_function_name (type);
4516 : }
4517 :
4518 7661 : tree fntype = build_function_type (void_type_node, void_list_node);
4519 7661 : tree fndecl = build_lang_decl (FUNCTION_DECL, name, fntype);
4520 :
4521 7661 : if (omp_target)
4522 : {
4523 15 : DECL_ATTRIBUTES (fndecl)
4524 15 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
4525 15 : DECL_ATTRIBUTES (fndecl));
4526 15 : DECL_ATTRIBUTES (fndecl)
4527 30 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
4528 15 : DECL_ATTRIBUTES (fndecl));
4529 : }
4530 :
4531 7661 : DECL_CONTEXT (fndecl) = FROB_CONTEXT (global_namespace);
4532 7661 : if (is_module_init)
4533 : {
4534 2014 : SET_DECL_ASSEMBLER_NAME (fndecl, name);
4535 2014 : TREE_PUBLIC (fndecl) = true;
4536 2014 : determine_visibility (fndecl);
4537 : }
4538 : else
4539 5647 : TREE_PUBLIC (fndecl) = 0;
4540 7661 : start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
4541 :
4542 : /* Mark as artificial because it's not explicitly in the user's
4543 : source code. */
4544 7661 : DECL_ARTIFICIAL (current_function_decl) = 1;
4545 :
4546 : /* Mark this declaration as used to avoid spurious warnings. */
4547 7661 : TREE_USED (current_function_decl) = 1;
4548 :
4549 : /* Mark this function as a global constructor or destructor. */
4550 7661 : if (initp)
4551 7652 : DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
4552 : else
4553 9 : DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
4554 :
4555 7661 : tree body = begin_compound_stmt (BCS_FN_BODY);
4556 :
4557 7661 : if (is_module_init && has_body)
4558 : {
4559 : // If the function is going to be empty, don't emit idempotency.
4560 : // 'static bool __in_chrg = false;
4561 : // if (__inchrg) return;
4562 : // __inchrg = true
4563 73 : tree var = build_lang_decl (VAR_DECL, in_charge_identifier,
4564 : boolean_type_node);
4565 73 : DECL_CONTEXT (var) = fndecl;
4566 73 : DECL_ARTIFICIAL (var) = true;
4567 73 : TREE_STATIC (var) = true;
4568 73 : pushdecl (var);
4569 73 : cp_finish_decl (var, NULL_TREE, false, NULL_TREE, 0);
4570 :
4571 73 : tree if_stmt = begin_if_stmt ();
4572 73 : finish_if_stmt_cond (var, if_stmt);
4573 73 : finish_return_stmt (NULL_TREE);
4574 73 : finish_then_clause (if_stmt);
4575 73 : finish_if_stmt (if_stmt);
4576 :
4577 73 : tree assign = build2 (MODIFY_EXPR, boolean_type_node,
4578 : var, boolean_true_node);
4579 73 : TREE_SIDE_EFFECTS (assign) = true;
4580 73 : finish_expr_stmt (assign);
4581 : }
4582 :
4583 7661 : return body;
4584 : }
4585 :
4586 : /* Finish a global constructor or destructor. Add it to the global
4587 : ctors or dtors, if STARTP is true. */
4588 :
4589 : static tree
4590 7658 : finish_objects (bool initp, unsigned priority, tree body, bool startp)
4591 : {
4592 : /* Finish up. */
4593 7658 : finish_compound_stmt (body);
4594 7658 : tree fn = finish_function (/*inline_p=*/false);
4595 :
4596 7658 : if (!startp)
4597 : ; // Neither ctor nor dtor I be.
4598 5717 : else if (initp)
4599 : {
4600 5708 : DECL_STATIC_CONSTRUCTOR (fn) = 1;
4601 5708 : decl_init_priority_insert (fn, priority);
4602 : }
4603 : else
4604 : {
4605 9 : DECL_STATIC_DESTRUCTOR (fn) = 1;
4606 9 : decl_fini_priority_insert (fn, priority);
4607 : }
4608 :
4609 7658 : return fn;
4610 : }
4611 :
4612 : /* The name of the function we create to handle initializations and
4613 : destructions for objects with static storage duration. */
4614 : #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
4615 : #define OMP_SSDF_IDENTIFIER "__omp_target_static_init_and_destruction"
4616 :
4617 : /* Begins the generation of the function that will handle all
4618 : initialization or destruction of objects with static storage
4619 : duration at PRIORITY.
4620 :
4621 : It is assumed that this function will be called once for the host, and once
4622 : for an OpenMP offload target. */
4623 :
4624 : static tree
4625 5726 : start_partial_init_fini_fn (bool initp, unsigned priority, unsigned count,
4626 : bool omp_target)
4627 : {
4628 5726 : char id[MAX (sizeof (SSDF_IDENTIFIER), sizeof (OMP_SSDF_IDENTIFIER))
4629 : + 1 /* \0 */ + 32];
4630 5726 : tree name;
4631 :
4632 : /* Create the identifier for this function. It will be of the form
4633 : SSDF_IDENTIFIER_<number> if not omp_target and otherwise
4634 : OMP_SSDF_IDENTIFIER_<number>. */
4635 5726 : sprintf (id, "%s_%u", omp_target ? OMP_SSDF_IDENTIFIER : SSDF_IDENTIFIER,
4636 : count);
4637 5726 : name = get_identifier (id);
4638 5726 : tree type = build_function_type (void_type_node, void_list_node);
4639 :
4640 : /* Create the FUNCTION_DECL itself. */
4641 5726 : tree fn = build_lang_decl (FUNCTION_DECL, name, type);
4642 5726 : TREE_PUBLIC (fn) = 0;
4643 5726 : DECL_ARTIFICIAL (fn) = 1;
4644 :
4645 5726 : if (omp_target)
4646 : {
4647 15 : DECL_ATTRIBUTES (fn)
4648 15 : = tree_cons (get_identifier ("omp declare target"), NULL_TREE,
4649 15 : DECL_ATTRIBUTES (fn));
4650 15 : DECL_ATTRIBUTES (fn)
4651 30 : = tree_cons (get_identifier ("omp declare target nohost"), NULL_TREE,
4652 15 : DECL_ATTRIBUTES (fn));
4653 : }
4654 :
4655 5726 : int idx = initp + 2 * omp_target;
4656 :
4657 : /* Put this function in the list of functions to be called from the
4658 : static constructors and destructors. */
4659 5726 : if (!static_init_fini_fns[idx])
4660 5696 : static_init_fini_fns[idx] = priority_map_t::create_ggc ();
4661 5726 : auto &slot = static_init_fini_fns[idx]->get_or_insert (priority);
4662 5726 : slot = tree_cons (fn, NULL_TREE, slot);
4663 :
4664 : /* Put the function in the global scope. */
4665 5726 : pushdecl (fn);
4666 :
4667 : /* Start the function itself. This is equivalent to declaring the
4668 : function as:
4669 :
4670 : static void __ssdf (int __initialize_p, init __priority_p);
4671 :
4672 : It is static because we only need to call this function from the
4673 : various constructor and destructor functions for this module. */
4674 5726 : start_preparsed_function (fn, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
4675 :
4676 : /* Set up the scope of the outermost block in the function. */
4677 5726 : return begin_compound_stmt (BCS_FN_BODY);
4678 : }
4679 :
4680 : /* Finish the generation of the function which performs initialization
4681 : or destruction of objects with static storage duration. */
4682 :
4683 : static void
4684 5726 : finish_partial_init_fini_fn (tree body)
4685 : {
4686 : /* Close out the function. */
4687 5726 : finish_compound_stmt (body);
4688 5726 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
4689 5726 : }
4690 :
4691 : /* The effective initialization priority of a DECL. */
4692 :
4693 : #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
4694 : ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
4695 : ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
4696 :
4697 : /* Whether a DECL needs a guard to protect it against multiple
4698 : initialization. */
4699 :
4700 : #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
4701 : || DECL_ONE_ONLY (decl) \
4702 : || DECL_WEAK (decl)))
4703 :
4704 : /* Walks the initializer list of a global variable and looks for
4705 : temporary variables (DECL_NAME() == NULL and DECL_ARTIFICIAL != 0)
4706 : and that have their DECL_CONTEXT() == NULL. For each such
4707 : temporary variable, set their DECL_CONTEXT() to CTX -- the
4708 : initializing function. This is necessary because otherwise some
4709 : optimizers (enabled by -O2 -fprofile-arcs) might crash when trying
4710 : to refer to a temporary variable that does not have its
4711 : DECL_CONTEXT() properly set. */
4712 :
4713 : static tree
4714 195122 : fix_temporary_vars_context_r (tree *node,
4715 : int * /*unused*/,
4716 : void *ctx)
4717 : {
4718 195122 : if (TREE_CODE (*node) == BIND_EXPR)
4719 446 : for (tree var = BIND_EXPR_VARS (*node); var; var = DECL_CHAIN (var))
4720 223 : if (VAR_P (var) && !DECL_NAME (var)
4721 446 : && DECL_ARTIFICIAL (var) && !DECL_CONTEXT (var))
4722 223 : DECL_CONTEXT (var) = tree (ctx);
4723 :
4724 195122 : return NULL_TREE;
4725 : }
4726 :
4727 : /* Set up to handle the initialization or destruction of DECL. If
4728 : INITP is nonzero, we are initializing the variable. Otherwise, we
4729 : are destroying it. */
4730 :
4731 : static void
4732 11546 : one_static_initialization_or_destruction (bool initp, tree decl, tree init,
4733 : bool omp_target)
4734 : {
4735 : /* If we are supposed to destruct and there's a trivial destructor,
4736 : nothing has to be done. */
4737 11546 : gcc_checking_assert (init || !TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)));
4738 :
4739 : /* Trick the compiler into thinking we are at the file and line
4740 : where DECL was declared so that error-messages make sense, and so
4741 : that the debugger will show somewhat sensible file and line
4742 : information. */
4743 11546 : input_location = DECL_SOURCE_LOCATION (decl);
4744 :
4745 : /* Make sure temporary variables in the initialiser all have
4746 : their DECL_CONTEXT() set to a value different from NULL_TREE.
4747 : This can happen when global variables initializers are built.
4748 : In that case, the DECL_CONTEXT() of the global variables _AND_ of all
4749 : the temporary variables that might have been generated in the
4750 : accompanying initializers is NULL_TREE, meaning the variables have been
4751 : declared in the global namespace.
4752 : What we want to do here is to fix that and make sure the DECL_CONTEXT()
4753 : of the temporaries are set to the current function decl. */
4754 11546 : cp_walk_tree_without_duplicates (&init,
4755 : fix_temporary_vars_context_r,
4756 : current_function_decl);
4757 :
4758 : /* Because of:
4759 :
4760 : [class.access.spec]
4761 :
4762 : Access control for implicit calls to the constructors,
4763 : the conversion functions, or the destructor called to
4764 : create and destroy a static data member is performed as
4765 : if these calls appeared in the scope of the member's
4766 : class.
4767 :
4768 : we pretend we are in a static member function of the class of
4769 : which the DECL is a member. */
4770 11546 : if (member_p (decl))
4771 : {
4772 1799 : DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
4773 1799 : DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
4774 : }
4775 :
4776 : /* Assume we don't need a guard. */
4777 11546 : tree guard_if_stmt = NULL_TREE;
4778 :
4779 : /* We need a guard if this is an object with external linkage that
4780 : might be initialized in more than one place. (For example, a
4781 : static data member of a template, when the data member requires
4782 : construction.) */
4783 11546 : if (NEEDS_GUARD_P (decl))
4784 : {
4785 978 : tree guard = get_guard (decl);
4786 978 : tree guard_cond;
4787 :
4788 978 : if (flag_use_cxa_atexit)
4789 : {
4790 : /* When using __cxa_atexit, we just check the GUARD as we
4791 : would for a local static. We never try to destroy
4792 : anything from a static destructor. */
4793 978 : gcc_assert (initp);
4794 978 : guard_cond = get_guard_cond (guard, false);
4795 : }
4796 : else
4797 : {
4798 : /* If we don't have __cxa_atexit, then we will be running
4799 : destructors from .fini sections, or their equivalents.
4800 : So, we need to know how many times we've tried to
4801 : initialize this object. We do initializations only if
4802 : the GUARD was or becomes zero (initp vs !initp
4803 : respectively). */
4804 0 : guard_cond = cp_build_unary_op (initp ? POSTINCREMENT_EXPR
4805 : : PREDECREMENT_EXPR,
4806 : guard,
4807 : /*noconvert=*/true,
4808 : tf_warning_or_error);
4809 0 : guard_cond = cp_build_binary_op (input_location, EQ_EXPR, guard_cond,
4810 : integer_zero_node,
4811 : tf_warning_or_error);
4812 : }
4813 :
4814 978 : guard_if_stmt = begin_if_stmt ();
4815 978 : finish_if_stmt_cond (guard_cond, guard_if_stmt);
4816 :
4817 978 : if (flag_use_cxa_atexit)
4818 : /* Set the GUARD now. */
4819 978 : finish_expr_stmt (set_guard (guard));
4820 : }
4821 :
4822 : /* Perform the initialization or destruction. */
4823 11546 : if (initp)
4824 : {
4825 11531 : if (init)
4826 : {
4827 10805 : finish_expr_stmt (init);
4828 10805 : if (sanitize_flags_p (SANITIZE_ADDRESS, decl))
4829 28 : if (varpool_node *vnode = varpool_node::get (decl))
4830 28 : vnode->dynamically_initialized = 1;
4831 : }
4832 :
4833 : /* If we're using __cxa_atexit, register a function that calls the
4834 : destructor for the object. */
4835 11531 : if (flag_use_cxa_atexit)
4836 11522 : finish_expr_stmt (register_dtor_fn (decl, omp_target));
4837 : }
4838 : else
4839 15 : finish_expr_stmt (build_cleanup (decl));
4840 :
4841 : /* Finish the guard if-stmt, if necessary. */
4842 11546 : if (guard_if_stmt)
4843 : {
4844 978 : finish_then_clause (guard_if_stmt);
4845 978 : finish_if_stmt (guard_if_stmt);
4846 : }
4847 :
4848 : /* Now that we're done with DECL we don't need to pretend to be a
4849 : member of its class any longer. */
4850 11546 : DECL_CONTEXT (current_function_decl) = NULL_TREE;
4851 11546 : DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
4852 11546 : }
4853 :
4854 : /* Helper function for emit_partial_init_fini_fn and handle_tls_init.
4855 : For structured bindings, disable stmts_are_full_exprs_p ()
4856 : on STATIC_INIT_DECOMP_BASE_P nodes, re-enable it on the
4857 : first STATIC_INIT_DECOMP_NONBASE_P node and emit all the
4858 : STATIC_INIT_DECOMP_BASE_P and STATIC_INIT_DECOMP_NONBASE_P
4859 : consecutive nodes in a single STATEMENT_LIST wrapped with
4860 : CLEANUP_POINT_EXPR. */
4861 :
4862 : static inline tree
4863 11546 : decomp_handle_one_var (tree node, tree sl, bool *saw_nonbase,
4864 : int save_stmts_are_full_exprs_p)
4865 : {
4866 11615 : if (sl && !*saw_nonbase && STATIC_INIT_DECOMP_NONBASE_P (node))
4867 : {
4868 63 : *saw_nonbase = true;
4869 63 : current_stmt_tree ()->stmts_are_full_exprs_p
4870 63 : = save_stmts_are_full_exprs_p;
4871 : }
4872 11669 : else if (sl && *saw_nonbase && !STATIC_INIT_DECOMP_NONBASE_P (node))
4873 : {
4874 45 : sl = pop_stmt_list (sl);
4875 45 : sl = maybe_cleanup_point_expr_void (sl);
4876 45 : add_stmt (sl);
4877 45 : sl = NULL_TREE;
4878 : }
4879 22882 : if (sl == NULL_TREE && STATIC_INIT_DECOMP_BASE_P (node))
4880 : {
4881 63 : sl = push_stmt_list ();
4882 63 : *saw_nonbase = false;
4883 63 : current_stmt_tree ()->stmts_are_full_exprs_p = 0;
4884 : }
4885 11546 : return sl;
4886 : }
4887 :
4888 : /* Similarly helper called when the whole var list is processed. */
4889 :
4890 : static inline void
4891 5794 : decomp_finalize_var_list (tree sl, int save_stmts_are_full_exprs_p)
4892 : {
4893 5794 : if (sl)
4894 : {
4895 18 : current_stmt_tree ()->stmts_are_full_exprs_p
4896 18 : = save_stmts_are_full_exprs_p;
4897 18 : sl = pop_stmt_list (sl);
4898 18 : sl = maybe_cleanup_point_expr_void (sl);
4899 18 : add_stmt (sl);
4900 : }
4901 5794 : }
4902 :
4903 : /* Helper for emit_partial_init_fini_fn OpenMP target handling, called via
4904 : walk_tree. Set DECL_CONTEXT on any automatic temporaries which still
4905 : have it NULL to id->src_fn, so that later copy_tree_body_r can remap those.
4906 : Otherwise DECL_CONTEXT would be set only during gimplification of the host
4907 : fn and when copy_tree_body_r doesn't remap those, we'd ICE during the
4908 : target fn gimplification because the same automatic VAR_DECL can't be
4909 : used in multiple functions (with the exception of nested functions). */
4910 :
4911 : static tree
4912 303 : set_context_for_auto_vars_r (tree *tp, int *, void *data)
4913 : {
4914 303 : copy_body_data *id = (copy_body_data *) data;
4915 303 : if (auto_var_in_fn_p (*tp, NULL_TREE) && DECL_ARTIFICIAL (*tp))
4916 11 : DECL_CONTEXT (*tp) = id->src_fn;
4917 303 : return NULL_TREE;
4918 : }
4919 :
4920 : /* Generate code to do the initialization or destruction of the decls in VARS,
4921 : a TREE_LIST of VAR_DECL with static storage duration.
4922 : Whether initialization or destruction is performed is specified by INITP. */
4923 :
4924 : static tree
4925 5671 : emit_partial_init_fini_fn (bool initp, unsigned priority, tree vars,
4926 : unsigned counter, location_t locus, tree host_fn)
4927 : {
4928 5671 : input_location = locus;
4929 5671 : bool omp_target = (host_fn != NULL_TREE);
4930 5671 : tree body = start_partial_init_fini_fn (initp, priority, counter, omp_target);
4931 5671 : tree fndecl = current_function_decl;
4932 :
4933 5671 : tree nonhost_if_stmt = NULL_TREE;
4934 5671 : if (omp_target)
4935 : {
4936 15 : nonhost_if_stmt = begin_if_stmt ();
4937 : /* We add an "omp declare target nohost" attribute, but (for
4938 : now) we still get a copy of the constructor/destructor on
4939 : the host. Make sure it does nothing unless we're on the
4940 : target device. */
4941 15 : tree fn = builtin_decl_explicit (BUILT_IN_OMP_IS_INITIAL_DEVICE);
4942 15 : tree initial_dev = build_call_expr (fn, 0);
4943 15 : tree target_dev_p
4944 15 : = cp_build_binary_op (input_location, NE_EXPR, initial_dev,
4945 : integer_one_node, tf_warning_or_error);
4946 15 : finish_if_stmt_cond (target_dev_p, nonhost_if_stmt);
4947 : }
4948 :
4949 5671 : tree sl = NULL_TREE;
4950 5671 : int save_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4951 5671 : bool saw_nonbase = false;
4952 16422 : for (tree node = vars; node; node = TREE_CHAIN (node))
4953 : {
4954 10751 : tree decl = TREE_VALUE (node);
4955 10751 : tree init = TREE_PURPOSE (node);
4956 10751 : sl = decomp_handle_one_var (node, sl, &saw_nonbase,
4957 : save_stmts_are_full_exprs_p);
4958 : /* We will emit 'init' twice, and it is modified in-place during
4959 : gimplification. Make a copy here. */
4960 10751 : if (omp_target)
4961 : {
4962 : /* We've already emitted INIT in the host version of the ctor/dtor
4963 : function. We need to deep-copy it (including new versions of
4964 : local variables introduced, etc.) for use in the target
4965 : ctor/dtor function. */
4966 19 : copy_body_data id;
4967 19 : hash_map<tree, tree> decl_map;
4968 19 : memset (&id, 0, sizeof (id));
4969 19 : id.src_fn = host_fn;
4970 19 : id.dst_fn = current_function_decl;
4971 19 : id.src_cfun = DECL_STRUCT_FUNCTION (id.src_fn);
4972 19 : id.decl_map = &decl_map;
4973 19 : id.copy_decl = copy_decl_no_change;
4974 19 : id.transform_call_graph_edges = CB_CGE_DUPLICATE;
4975 19 : id.transform_new_cfg = true;
4976 19 : id.transform_return_to_modify = false;
4977 19 : id.eh_lp_nr = 0;
4978 19 : walk_tree (&init, set_context_for_auto_vars_r, &id, NULL);
4979 19 : walk_tree (&init, copy_tree_body_r, &id, NULL);
4980 19 : }
4981 : /* Do one initialization or destruction. */
4982 10751 : one_static_initialization_or_destruction (initp, decl, init, omp_target);
4983 : }
4984 5671 : decomp_finalize_var_list (sl, save_stmts_are_full_exprs_p);
4985 :
4986 5671 : if (omp_target)
4987 : {
4988 : /* Finish up nonhost if-stmt body. */
4989 15 : finish_then_clause (nonhost_if_stmt);
4990 15 : finish_if_stmt (nonhost_if_stmt);
4991 : }
4992 :
4993 : /* Finish up the static storage duration function for this
4994 : round. */
4995 5671 : input_location = locus;
4996 5671 : finish_partial_init_fini_fn (body);
4997 :
4998 5671 : return fndecl;
4999 : }
5000 :
5001 : /* VARS is a list of variables with static storage duration which may
5002 : need initialization and/or finalization. Remove those variables
5003 : that don't really need to be initialized or finalized, and return
5004 : the resulting list. The order in which the variables appear in
5005 : VARS is in reverse order of the order in which they should actually
5006 : be initialized. That order is preserved. */
5007 :
5008 : static tree
5009 295006 : prune_vars_needing_no_initialization (tree *vars)
5010 : {
5011 295006 : tree *var = vars;
5012 295006 : tree result = NULL_TREE;
5013 :
5014 306524 : while (*var)
5015 : {
5016 11518 : tree t = *var;
5017 11518 : tree decl = TREE_VALUE (t);
5018 11518 : tree init = TREE_PURPOSE (t);
5019 :
5020 : /* Deal gracefully with error. */
5021 11518 : if (error_operand_p (decl))
5022 : {
5023 0 : var = &TREE_CHAIN (t);
5024 0 : continue;
5025 : }
5026 :
5027 : /* The only things that can be initialized are variables. */
5028 11518 : gcc_assert (VAR_P (decl));
5029 :
5030 : /* If this object is not defined, we don't need to do anything
5031 : here. */
5032 11518 : if (DECL_EXTERNAL (decl))
5033 : {
5034 0 : gcc_checking_assert (!STATIC_INIT_DECOMP_BASE_P (t)
5035 : && !STATIC_INIT_DECOMP_NONBASE_P (t));
5036 0 : var = &TREE_CHAIN (t);
5037 0 : continue;
5038 : }
5039 :
5040 : /* Also, if the initializer already contains errors, we can bail
5041 : out now. */
5042 10789 : if (init && TREE_CODE (init) == TREE_LIST
5043 11518 : && value_member (error_mark_node, init))
5044 : {
5045 0 : var = &TREE_CHAIN (t);
5046 0 : continue;
5047 : }
5048 :
5049 : /* This variable is going to need initialization and/or
5050 : finalization, so we add it to the list. */
5051 11518 : *var = TREE_CHAIN (t);
5052 11518 : TREE_CHAIN (t) = result;
5053 11518 : result = t;
5054 : }
5055 :
5056 295006 : return result;
5057 : }
5058 :
5059 : /* Split VAR_LIST by init priority and add into PARTS hash table.
5060 : This reverses the variable ordering. */
5061 :
5062 : void
5063 5639 : partition_vars_for_init_fini (tree var_list, priority_map_t *(&parts)[4])
5064 : {
5065 5639 : unsigned priority = 0;
5066 5639 : enum { none, base, nonbase } decomp_state = none;
5067 16362 : for (auto node = var_list; node; node = TREE_CHAIN (node))
5068 : {
5069 10723 : tree decl = TREE_VALUE (node);
5070 10723 : tree init = TREE_PURPOSE (node);
5071 10723 : bool has_cleanup = !TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl));
5072 10723 : if (decomp_state == base && STATIC_INIT_DECOMP_NONBASE_P (node))
5073 : decomp_state = nonbase;
5074 10687 : else if (decomp_state == nonbase && !STATIC_INIT_DECOMP_NONBASE_P (node))
5075 : decomp_state = none;
5076 10702 : if (decomp_state == none)
5077 10615 : priority = DECL_EFFECTIVE_INIT_PRIORITY (decl);
5078 :
5079 10723 : if (init || (flag_use_cxa_atexit && has_cleanup))
5080 : {
5081 : // Add to initialization list.
5082 10717 : if (!parts[true])
5083 5633 : parts[true] = priority_map_t::create_ggc ();
5084 10717 : auto &slot = parts[true]->get_or_insert (priority);
5085 10717 : slot = tree_cons (init, decl, slot);
5086 10717 : if (init
5087 10009 : && STATIC_INIT_DECOMP_BASE_P (node)
5088 10753 : && decomp_state == none)
5089 : {
5090 : /* If one or more STATIC_INIT_DECOMP_BASE_P with at least
5091 : one init is followed by at least one
5092 : STATIC_INIT_DECOMP_NONBASE_P with init, mark it in the
5093 : resulting chain as well. */
5094 36 : for (tree n = TREE_CHAIN (node); n; n = TREE_CHAIN (n))
5095 36 : if (STATIC_INIT_DECOMP_BASE_P (n))
5096 0 : continue;
5097 36 : else if (STATIC_INIT_DECOMP_NONBASE_P (n))
5098 : {
5099 36 : if (TREE_PURPOSE (n))
5100 : {
5101 : decomp_state = base;
5102 : break;
5103 : }
5104 : else
5105 0 : continue;
5106 : }
5107 : else
5108 : break;
5109 : }
5110 10717 : if (init && decomp_state == base)
5111 36 : STATIC_INIT_DECOMP_BASE_P (slot) = 1;
5112 10681 : else if (decomp_state == nonbase)
5113 108 : STATIC_INIT_DECOMP_NONBASE_P (slot) = 1;
5114 : }
5115 :
5116 10723 : if (!flag_use_cxa_atexit && has_cleanup)
5117 : {
5118 : // Add to finalization list.
5119 15 : if (!parts[false])
5120 9 : parts[false] = priority_map_t::create_ggc ();
5121 15 : auto &slot = parts[false]->get_or_insert (priority);
5122 15 : slot = tree_cons (NULL_TREE, decl, slot);
5123 : }
5124 :
5125 10723 : if (flag_openmp
5126 10723 : && lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl)))
5127 : {
5128 19 : priority_map_t **omp_parts = parts + 2;
5129 :
5130 19 : if (init || (flag_use_cxa_atexit && has_cleanup))
5131 : {
5132 : // Add to initialization list.
5133 19 : if (!omp_parts[true])
5134 14 : omp_parts[true] = priority_map_t::create_ggc ();
5135 19 : auto &slot = omp_parts[true]->get_or_insert (priority);
5136 19 : slot = tree_cons (init, decl, slot);
5137 19 : if (init && decomp_state == base)
5138 0 : STATIC_INIT_DECOMP_BASE_P (slot) = 1;
5139 19 : else if (decomp_state == nonbase)
5140 0 : STATIC_INIT_DECOMP_NONBASE_P (slot) = 1;
5141 : }
5142 :
5143 19 : if (!flag_use_cxa_atexit && has_cleanup)
5144 : {
5145 : // Add to finalization list.
5146 0 : if (!omp_parts[false])
5147 0 : omp_parts[false] = priority_map_t::create_ggc ();
5148 0 : auto &slot = omp_parts[false]->get_or_insert (priority);
5149 0 : slot = tree_cons (NULL_TREE, decl, slot);
5150 : }
5151 : }
5152 : }
5153 5639 : }
5154 :
5155 : /* Make sure we have told the back end about all the variables in
5156 : VARS. */
5157 :
5158 : static void
5159 5762 : write_out_vars (tree vars)
5160 : {
5161 5762 : tree v;
5162 :
5163 17280 : for (v = vars; v; v = TREE_CHAIN (v))
5164 : {
5165 11518 : tree var = TREE_VALUE (v);
5166 11518 : if (!var_finalized_p (var))
5167 : {
5168 906 : import_export_decl (var);
5169 906 : rest_of_decl_compilation (var, 1, 1);
5170 : }
5171 : }
5172 5762 : }
5173 :
5174 : /* Generate a static constructor or destructor that calls the given
5175 : init/fini fns at the indicated priority. */
5176 :
5177 : static void
5178 7652 : generate_ctor_or_dtor_function (bool initp, unsigned priority,
5179 : tree fns, location_t locus, bool omp_target)
5180 : {
5181 7652 : input_location = locus;
5182 7652 : tree body = start_objects (initp, priority, bool (fns), omp_target);
5183 :
5184 7652 : if (fns)
5185 : {
5186 : /* To make sure dynamic construction doesn't access globals from
5187 : other compilation units where they might not be yet
5188 : constructed, for -fsanitize=address insert
5189 : __asan_before_dynamic_init call that prevents access to
5190 : either all global variables that need construction in other
5191 : compilation units, or at least those that haven't been
5192 : initialized yet. Variables that need dynamic construction in
5193 : the current compilation unit are kept accessible. */
5194 5711 : if (initp && (flag_sanitize & SANITIZE_ADDRESS))
5195 21 : finish_expr_stmt (asan_dynamic_init_call (/*after_p=*/false));
5196 :
5197 : /* Call the static init/fini functions. */
5198 11437 : for (tree node = fns; node; node = TREE_CHAIN (node))
5199 : {
5200 5726 : tree fn = TREE_PURPOSE (node);
5201 :
5202 : // We should never find a pure or constant cdtor.
5203 5726 : gcc_checking_assert (!(flags_from_decl_or_type (fn)
5204 : & (ECF_CONST | ECF_PURE)));
5205 :
5206 5726 : tree call = cp_build_function_call_nary (fn, tf_warning_or_error,
5207 : NULL_TREE);
5208 5726 : finish_expr_stmt (call);
5209 : }
5210 :
5211 : /* Revert what __asan_before_dynamic_init did by calling
5212 : __asan_after_dynamic_init. */
5213 5711 : if (initp && (flag_sanitize & SANITIZE_ADDRESS))
5214 21 : finish_expr_stmt (asan_dynamic_init_call (/*after_p=*/true));
5215 : }
5216 :
5217 : /* Close out the function, and arrange for it to be called at init
5218 : or fini time, if non-empty. (Even non-nop module initializer
5219 : functions need this, as we cannot guarantee the module is
5220 : imported somewhere in the program.) */
5221 7652 : expand_or_defer_fn (finish_objects (initp, priority, body, fns != NULL_TREE));
5222 7652 : }
5223 :
5224 : /* Return C++ property of T, based on given operation OP. */
5225 :
5226 : static int
5227 1941 : cpp_check (tree t, cpp_operation op)
5228 : {
5229 1941 : switch (op)
5230 : {
5231 9 : case HAS_DEPENDENT_TEMPLATE_ARGS:
5232 9 : {
5233 9 : tree ti = CLASSTYPE_TEMPLATE_INFO (t);
5234 9 : if (!ti)
5235 : return 0;
5236 9 : ++processing_template_decl;
5237 9 : const bool dep = any_dependent_template_arguments_p (TI_ARGS (ti));
5238 9 : --processing_template_decl;
5239 9 : return dep;
5240 : }
5241 294 : case IS_ABSTRACT:
5242 294 : return DECL_PURE_VIRTUAL_P (t);
5243 165 : case IS_ASSIGNMENT_OPERATOR:
5244 165 : return DECL_ASSIGNMENT_OPERATOR_P (t);
5245 165 : case IS_CONSTRUCTOR:
5246 330 : return DECL_CONSTRUCTOR_P (t);
5247 165 : case IS_DESTRUCTOR:
5248 330 : return DECL_DESTRUCTOR_P (t);
5249 165 : case IS_COPY_CONSTRUCTOR:
5250 477 : return DECL_COPY_CONSTRUCTOR_P (t);
5251 165 : case IS_MOVE_CONSTRUCTOR:
5252 483 : return DECL_MOVE_CONSTRUCTOR_P (t);
5253 447 : case IS_TEMPLATE:
5254 447 : return TREE_CODE (t) == TEMPLATE_DECL;
5255 366 : case IS_TRIVIAL:
5256 366 : return trivial_type_p (t);
5257 : default:
5258 : return 0;
5259 : }
5260 : }
5261 :
5262 : /* Collect source file references recursively, starting from NAMESPC. */
5263 :
5264 : static void
5265 78 : collect_source_refs (tree namespc)
5266 : {
5267 : /* Iterate over names in this name space. */
5268 184018 : for (tree t = NAMESPACE_LEVEL (namespc)->names; t; t = TREE_CHAIN (t))
5269 183940 : if (DECL_IS_UNDECLARED_BUILTIN (t))
5270 : ;
5271 240 : else if (TREE_CODE (t) == NAMESPACE_DECL && !DECL_NAMESPACE_ALIAS (t))
5272 3 : collect_source_refs (t);
5273 : else
5274 237 : collect_source_ref (DECL_SOURCE_FILE (t));
5275 78 : }
5276 :
5277 : /* Collect decls relevant to SOURCE_FILE from all namespaces recursively,
5278 : starting from NAMESPC. */
5279 :
5280 : static void
5281 228 : collect_ada_namespace (tree namespc, const char *source_file)
5282 : {
5283 228 : tree decl = NAMESPACE_LEVEL (namespc)->names;
5284 :
5285 : /* Collect decls from this namespace. This will skip
5286 : NAMESPACE_DECLs (both aliases and regular, it cannot tell). */
5287 228 : collect_ada_nodes (decl, source_file);
5288 :
5289 : /* Now scan for namespace children, and dump them. */
5290 220196 : for (; decl; decl = TREE_CHAIN (decl))
5291 219740 : if (TREE_CODE (decl) == NAMESPACE_DECL && !DECL_NAMESPACE_ALIAS (decl))
5292 153 : collect_ada_namespace (decl, source_file);
5293 228 : }
5294 :
5295 : /* Returns true iff there is a definition available for variable or
5296 : function DECL. */
5297 :
5298 : bool
5299 85473369 : decl_defined_p (tree decl)
5300 : {
5301 85473369 : if (TREE_CODE (decl) == FUNCTION_DECL)
5302 76910715 : return (DECL_INITIAL (decl) != NULL_TREE
5303 : /* A pending instantiation of a friend temploid is defined. */
5304 76910715 : || (DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
5305 7821738 : && DECL_INITIAL (DECL_TEMPLATE_RESULT
5306 : (DECL_TI_TEMPLATE (decl)))));
5307 : else
5308 : {
5309 8562654 : gcc_assert (VAR_P (decl));
5310 8562654 : return (!DECL_EXTERNAL (decl)
5311 : /* An initialized variable is defined even if we've decided not
5312 : to emit it, unless it's initialized within the class and not
5313 : inline. Note that finish_static_member_decl doesn't set
5314 : DECL_IN_AGGR_P for inline variables, so we don't need to check
5315 : DECL_INLINE_VAR_P here. */
5316 8562654 : || (DECL_INITIAL (decl) && !DECL_IN_AGGR_P (decl)));
5317 : }
5318 : }
5319 :
5320 : /* Nonzero for a VAR_DECL whose value can be used in a constant expression.
5321 :
5322 : [expr.const]
5323 :
5324 : An integral constant-expression can only involve ... const
5325 : variables of integral or enumeration types initialized with
5326 : constant expressions ...
5327 :
5328 : C++0x also allows constexpr variables and temporaries initialized
5329 : with constant expressions. We handle the former here, but the latter
5330 : are just folded away in cxx_eval_constant_expression.
5331 :
5332 : The standard does not require that the expression be non-volatile.
5333 : G++ implements the proposed correction in DR 457. */
5334 :
5335 : bool
5336 1199200059 : decl_constant_var_p (tree decl)
5337 : {
5338 1199200059 : if (!decl_maybe_constant_var_p (decl))
5339 : return false;
5340 :
5341 : /* We don't know if a template static data member is initialized with
5342 : a constant expression until we instantiate its initializer. Even
5343 : in the case of a constexpr variable, we can't treat it as a
5344 : constant until its initializer is complete in case it's used in
5345 : its own initializer. */
5346 151627008 : maybe_instantiate_decl (decl);
5347 151624311 : return DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl);
5348 : }
5349 :
5350 : /* Returns true if DECL could be a symbolic constant variable, depending on
5351 : its initializer. */
5352 :
5353 : bool
5354 1582101470 : decl_maybe_constant_var_p (tree decl)
5355 : {
5356 1582101470 : tree type = TREE_TYPE (decl);
5357 1582101470 : if (!VAR_P (decl))
5358 : return false;
5359 752769789 : if (DECL_DECLARED_CONSTEXPR_P (decl)
5360 752769789 : && (!TREE_THIS_VOLATILE (decl) || NULLPTR_TYPE_P (type)))
5361 : return true;
5362 427884101 : if (DECL_HAS_VALUE_EXPR_P (decl))
5363 : /* A proxy isn't constant. */
5364 : return false;
5365 424759722 : if (TYPE_REF_P (type))
5366 : /* References can be constant. */;
5367 418144187 : else if (CP_TYPE_CONST_NON_VOLATILE_P (type)
5368 418144187 : && INTEGRAL_OR_ENUMERATION_TYPE_P (type))
5369 : /* And const integers. */;
5370 : else
5371 : return false;
5372 :
5373 88673644 : if (DECL_INITIAL (decl)
5374 137517603 : && !DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))
5375 : /* We know the initializer, and it isn't constant. */
5376 18848238 : return false;
5377 : else
5378 : return true;
5379 : }
5380 :
5381 : /* Complain that DECL uses a type with no linkage. In C++98 mode this is
5382 : called from grokfndecl and grokvardecl; in all modes it is called from
5383 : cp_write_global_declarations. */
5384 :
5385 : void
5386 1735447 : no_linkage_error (tree decl)
5387 : {
5388 1735447 : if (cxx_dialect >= cxx11
5389 1735447 : && (decl_defined_p (decl)
5390 : /* Treat templates which limit_bad_template_recursion decided
5391 : not to instantiate as if they were defined. */
5392 131 : || (errorcount + sorrycount > 0
5393 53 : && DECL_LANG_SPECIFIC (decl)
5394 53 : && DECL_TEMPLATE_INFO (decl)
5395 33 : && warning_suppressed_p (decl /* What warning? */))))
5396 : /* In C++11 it's ok if the decl is defined. */
5397 : return;
5398 :
5399 1189001 : if (DECL_LANG_SPECIFIC (decl) && DECL_MODULE_IMPORT_P (decl))
5400 : /* An imported decl is ok. */
5401 : return;
5402 :
5403 : /* Metafunctions are magic and should be considered defined even though
5404 : they have no bodies. ??? This can't be checked in decl_defined_p;
5405 : we'd get redefinition errors for some of our metafunctions. */
5406 1188956 : if (TREE_CODE (decl) == FUNCTION_DECL && metafunction_p (decl))
5407 : return;
5408 :
5409 1188950 : tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
5410 1188950 : if (t == NULL_TREE)
5411 : /* The type that got us on no_linkage_decls must have gotten a name for
5412 : linkage purposes. */;
5413 74 : else if (CLASS_TYPE_P (t) && TYPE_BEING_DEFINED (t))
5414 : // FIXME: This is now invalid, as a DR to c++98
5415 : /* The type might end up having a typedef name for linkage purposes. */
5416 0 : vec_safe_push (no_linkage_decls, decl);
5417 201 : else if (TYPE_UNNAMED_P (t))
5418 : {
5419 26 : bool d = false;
5420 26 : auto_diagnostic_group grp;
5421 26 : if (cxx_dialect >= cxx11)
5422 : {
5423 : /* If t is declared in a module CMI, then decl could actually
5424 : be defined in a different TU, so don't warn since C++20. */
5425 9 : tree relaxed = no_linkage_check (t, /*relaxed_p=*/true);
5426 9 : if (relaxed != NULL_TREE)
5427 9 : d = permerror (DECL_SOURCE_LOCATION (decl),
5428 : "%q#D, declared using an unnamed type, "
5429 : "is used but never defined", decl);
5430 0 : else if (cxx_dialect < cxx20)
5431 0 : d = pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wc__20_extensions,
5432 : "%q#D, declared using an unnamed type, "
5433 : "is used but not defined", decl);
5434 : }
5435 17 : else if (DECL_EXTERN_C_P (decl))
5436 : /* Allow this; it's pretty common in C. */;
5437 17 : else if (VAR_P (decl))
5438 : /* DRs 132, 319 and 389 seem to indicate types with
5439 : no linkage can only be used to declare extern "C"
5440 : entities. Since it's not always an error in the
5441 : ISO C++ 90 Standard, we only issue a warning. */
5442 16 : d = warning_at (DECL_SOURCE_LOCATION (decl), 0, "unnamed type "
5443 : "with no linkage used to declare variable %q#D with "
5444 : "linkage", decl);
5445 : else
5446 1 : d = permerror (DECL_SOURCE_LOCATION (decl), "unnamed type with no "
5447 : "linkage used to declare function %q#D with linkage",
5448 : decl);
5449 26 : if (d && is_typedef_decl (TYPE_NAME (t)))
5450 0 : inform (DECL_SOURCE_LOCATION (TYPE_NAME (t)), "%q#D does not refer "
5451 : "to the unqualified type, so it is not used for linkage",
5452 0 : TYPE_NAME (t));
5453 : /* Suppress warning from check_global_declaration if needed. */
5454 26 : if (d)
5455 23 : suppress_warning (decl, OPT_Wunused);
5456 26 : }
5457 48 : else if (cxx_dialect >= cxx11)
5458 : {
5459 48 : if (VAR_P (decl) || !DECL_PURE_VIRTUAL_P (decl))
5460 : {
5461 : /* Similarly for local types in a function with vague linkage or
5462 : defined in a module CMI, then decl could actually be defined
5463 : in a different TU, so don't warn since C++20. */
5464 45 : bool d = false;
5465 45 : tree relaxed = no_linkage_check (t, /*relaxed_p=*/true);
5466 45 : if (relaxed != NULL_TREE)
5467 30 : d = permerror (DECL_SOURCE_LOCATION (decl),
5468 : "%q#D, declared using local type "
5469 : "%qT, is used but never defined", decl, t);
5470 15 : else if (cxx_dialect < cxx20)
5471 3 : d = pedwarn (DECL_SOURCE_LOCATION (decl), OPT_Wc__20_extensions,
5472 : "%q#D, declared using local type "
5473 : "%qT, is used but not defined here", decl, t);
5474 : /* Suppress warning from check_global_declaration if needed. */
5475 33 : if (d)
5476 33 : suppress_warning (decl, OPT_Wunused);
5477 : }
5478 : }
5479 0 : else if (VAR_P (decl))
5480 0 : warning_at (DECL_SOURCE_LOCATION (decl), 0, "type %qT with no linkage "
5481 : "used to declare variable %q#D with linkage", t, decl);
5482 : else
5483 0 : permerror (DECL_SOURCE_LOCATION (decl), "type %qT with no linkage used "
5484 : "to declare function %q#D with linkage", t, decl);
5485 : }
5486 :
5487 : /* Collect declarations from all namespaces relevant to SOURCE_FILE. */
5488 :
5489 : static void
5490 75 : collect_all_refs (const char *source_file)
5491 : {
5492 75 : collect_ada_namespace (global_namespace, source_file);
5493 75 : }
5494 :
5495 : /* Clear DECL_EXTERNAL for NODE. */
5496 :
5497 : static bool
5498 157602524 : clear_decl_external (struct cgraph_node *node, void * /*data*/)
5499 : {
5500 157602524 : DECL_EXTERNAL (node->decl) = 0;
5501 157602524 : return false;
5502 : }
5503 :
5504 : /* Build up the function to run dynamic initializers for thread_local
5505 : variables in this translation unit and alias the init functions for the
5506 : individual variables to it. */
5507 :
5508 : static void
5509 147503 : handle_tls_init (void)
5510 : {
5511 147503 : tree vars = prune_vars_needing_no_initialization (&tls_aggregates);
5512 147503 : if (vars == NULL_TREE)
5513 147380 : return;
5514 :
5515 123 : location_t loc = DECL_SOURCE_LOCATION (TREE_VALUE (vars));
5516 :
5517 123 : write_out_vars (vars);
5518 :
5519 123 : tree guard = build_decl (loc, VAR_DECL, get_identifier ("__tls_guard"),
5520 : boolean_type_node);
5521 123 : TREE_PUBLIC (guard) = false;
5522 123 : TREE_STATIC (guard) = true;
5523 123 : DECL_ARTIFICIAL (guard) = true;
5524 123 : DECL_IGNORED_P (guard) = true;
5525 123 : TREE_USED (guard) = true;
5526 123 : CP_DECL_THREAD_LOCAL_P (guard) = true;
5527 123 : set_decl_tls_model (guard, decl_default_tls_model (guard));
5528 123 : pushdecl_top_level_and_finish (guard, NULL_TREE);
5529 :
5530 123 : tree fn = get_local_tls_init_fn (loc);
5531 123 : start_preparsed_function (fn, NULL_TREE, SF_PRE_PARSED);
5532 123 : tree body = begin_function_body ();
5533 123 : tree if_stmt = begin_if_stmt ();
5534 123 : tree cond = cp_build_unary_op (TRUTH_NOT_EXPR, guard, false,
5535 : tf_warning_or_error);
5536 123 : finish_if_stmt_cond (cond, if_stmt);
5537 123 : finish_expr_stmt (cp_build_modify_expr (loc, guard, NOP_EXPR,
5538 : boolean_true_node,
5539 : tf_warning_or_error));
5540 123 : tree sl = NULL_TREE;
5541 123 : int save_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5542 123 : bool saw_nonbase = false;
5543 918 : for (; vars; vars = TREE_CHAIN (vars))
5544 : {
5545 795 : tree var = TREE_VALUE (vars);
5546 795 : tree init = TREE_PURPOSE (vars);
5547 795 : sl = decomp_handle_one_var (vars, sl, &saw_nonbase,
5548 : save_stmts_are_full_exprs_p);
5549 795 : one_static_initialization_or_destruction (/*initp=*/true, var, init,
5550 : false);
5551 :
5552 : /* Output init aliases even with -fno-extern-tls-init. */
5553 795 : if (TARGET_SUPPORTS_ALIASES && TREE_PUBLIC (var))
5554 : {
5555 696 : tree single_init_fn = get_tls_init_fn (var);
5556 696 : if (single_init_fn == NULL_TREE)
5557 0 : continue;
5558 696 : cgraph_node *alias
5559 696 : = cgraph_node::get_create (fn)->create_same_body_alias
5560 696 : (single_init_fn, fn);
5561 696 : gcc_assert (alias != NULL);
5562 : }
5563 : }
5564 123 : decomp_finalize_var_list (sl, save_stmts_are_full_exprs_p);
5565 :
5566 123 : finish_then_clause (if_stmt);
5567 123 : finish_if_stmt (if_stmt);
5568 123 : finish_function_body (body);
5569 123 : expand_or_defer_fn (finish_function (/*inline_p=*/false));
5570 : }
5571 :
5572 : /* We're at the end of compilation, so generate any mangling aliases that
5573 : we've been saving up, if DECL is going to be output and ID2 isn't
5574 : already taken by another declaration. */
5575 :
5576 : static void
5577 37774 : generate_mangling_alias (tree decl, tree id2)
5578 : {
5579 37774 : struct cgraph_node *n = NULL;
5580 :
5581 37774 : if (TREE_CODE (decl) == FUNCTION_DECL)
5582 : {
5583 37700 : n = cgraph_node::get (decl);
5584 37700 : if (!n)
5585 : /* Don't create an alias to an unreferenced function. */
5586 : return;
5587 : }
5588 :
5589 37774 : tree *slot
5590 37774 : = mangled_decls->find_slot_with_hash (id2, IDENTIFIER_HASH_VALUE (id2),
5591 : INSERT);
5592 :
5593 : /* If there's a declaration already using this mangled name,
5594 : don't create a compatibility alias that conflicts. */
5595 37774 : if (*slot)
5596 : return;
5597 :
5598 37744 : tree alias = make_alias_for (decl, id2);
5599 37744 : *slot = alias;
5600 :
5601 37744 : DECL_IGNORED_P (alias) = 1;
5602 37744 : TREE_PUBLIC (alias) = TREE_PUBLIC (decl);
5603 37744 : DECL_VISIBILITY (alias) = DECL_VISIBILITY (decl);
5604 37744 : if (vague_linkage_p (decl))
5605 37584 : DECL_WEAK (alias) = 1;
5606 :
5607 37744 : if (n)
5608 37670 : n->create_same_body_alias (alias, decl);
5609 : else
5610 74 : varpool_node::create_extra_name_alias (alias, decl);
5611 : }
5612 :
5613 : /* Note that we might want to emit an alias with the symbol ID2 for DECL at
5614 : the end of translation, for compatibility across bugs in the mangling
5615 : implementation. */
5616 :
5617 : void
5618 37798 : note_mangling_alias (tree decl, tree id2)
5619 : {
5620 37798 : if (TARGET_SUPPORTS_ALIASES)
5621 : {
5622 37798 : if (!defer_mangling_aliases)
5623 24187 : generate_mangling_alias (decl, id2);
5624 : else
5625 : {
5626 13611 : vec_safe_push (mangling_aliases, decl);
5627 13611 : vec_safe_push (mangling_aliases, id2);
5628 : }
5629 : }
5630 37798 : }
5631 :
5632 : /* Emit all mangling aliases that were deferred up to this point. */
5633 :
5634 : void
5635 99773 : generate_mangling_aliases ()
5636 : {
5637 113360 : while (!vec_safe_is_empty (mangling_aliases))
5638 : {
5639 13587 : tree id2 = mangling_aliases->pop();
5640 13587 : tree decl = mangling_aliases->pop();
5641 13587 : generate_mangling_alias (decl, id2);
5642 : }
5643 99773 : defer_mangling_aliases = false;
5644 99773 : }
5645 :
5646 : /* Record a mangling of DECL, whose DECL_ASSEMBLER_NAME has just been
5647 : set. NEED_WARNING is true if we must warn about collisions. We do
5648 : this to spot changes in mangling that may require compatibility
5649 : aliases. */
5650 :
5651 : void
5652 87025424 : record_mangling (tree decl, bool need_warning)
5653 : {
5654 87025424 : if (!mangled_decls)
5655 77507 : mangled_decls = hash_table<mangled_decl_hash>::create_ggc (499);
5656 :
5657 87025424 : gcc_checking_assert (DECL_ASSEMBLER_NAME_SET_P (decl));
5658 87025424 : tree id = DECL_ASSEMBLER_NAME_RAW (decl);
5659 87025424 : tree *slot
5660 87025424 : = mangled_decls->find_slot_with_hash (id, IDENTIFIER_HASH_VALUE (id),
5661 : INSERT);
5662 :
5663 : /* If this is already an alias, cancel the alias, because the real
5664 : decl takes precedence. */
5665 87025424 : if (*slot && DECL_ARTIFICIAL (*slot) && DECL_IGNORED_P (*slot))
5666 : {
5667 27 : if (symtab_node *n = symtab_node::get (*slot))
5668 : {
5669 27 : if (n->cpp_implicit_alias)
5670 : /* Actually removing the node isn't safe if other code is already
5671 : holding a pointer to it, so just neutralize it. */
5672 27 : n->reset ();
5673 : }
5674 : else
5675 : /* analyze_functions might have already removed the alias from the
5676 : symbol table if it's internal. */
5677 0 : gcc_checking_assert (!TREE_PUBLIC (*slot));
5678 :
5679 27 : *slot = NULL_TREE;
5680 : }
5681 :
5682 87025424 : if (!*slot)
5683 87025216 : *slot = decl;
5684 208 : else if (need_warning)
5685 : {
5686 3 : auto_diagnostic_group d;
5687 3 : error_at (DECL_SOURCE_LOCATION (decl),
5688 : "mangling of %q#D as %qE conflicts with a previous mangle",
5689 : decl, id);
5690 3 : inform (DECL_SOURCE_LOCATION (*slot),
5691 : "previous mangling %q#D", *slot);
5692 3 : inform (DECL_SOURCE_LOCATION (decl),
5693 : "a later %<-fabi-version=%> (or =0)"
5694 : " avoids this error with a change in mangling");
5695 3 : *slot = decl;
5696 3 : }
5697 87025424 : }
5698 :
5699 : /* The mangled name of DECL is being forcibly changed to NAME. Remove
5700 : any existing knowledge of DECL's mangled name meaning DECL. */
5701 :
5702 : void
5703 281481832 : overwrite_mangling (tree decl, tree name)
5704 : {
5705 281481832 : if (tree id = DECL_ASSEMBLER_NAME_RAW (decl))
5706 256696 : if ((TREE_CODE (decl) == VAR_DECL
5707 256603 : || TREE_CODE (decl) == FUNCTION_DECL)
5708 256696 : && mangled_decls)
5709 499740 : if (tree *slot
5710 249870 : = mangled_decls->find_slot_with_hash (id, IDENTIFIER_HASH_VALUE (id),
5711 : NO_INSERT))
5712 135465 : if (*slot == decl)
5713 : {
5714 75 : mangled_decls->clear_slot (slot);
5715 :
5716 : /* If this is an alias, remove it from the symbol table. */
5717 75 : if (DECL_ARTIFICIAL (decl) && DECL_IGNORED_P (decl))
5718 0 : if (symtab_node *n = symtab_node::get (decl))
5719 0 : if (n->cpp_implicit_alias)
5720 0 : n->remove ();
5721 : }
5722 :
5723 281481832 : DECL_ASSEMBLER_NAME_RAW (decl) = name;
5724 281481832 : }
5725 :
5726 : /* The entire file is now complete. If requested, dump everything
5727 : to a file. */
5728 :
5729 : static void
5730 99870 : dump_tu (void)
5731 : {
5732 99870 : dump_flags_t flags;
5733 99870 : if (FILE *stream = dump_begin (raw_dump_id, &flags))
5734 : {
5735 6 : dump_node (global_namespace, flags & ~TDF_SLIM, stream);
5736 6 : dump_end (raw_dump_id, stream);
5737 : }
5738 99870 : }
5739 :
5740 : static location_t locus_at_end_of_parsing;
5741 :
5742 : /* Check the deallocation functions for CODE to see if we want to warn that
5743 : only one was defined. */
5744 :
5745 : static void
5746 1954 : maybe_warn_sized_delete (enum tree_code code)
5747 : {
5748 1954 : tree sized = NULL_TREE;
5749 1954 : tree unsized = NULL_TREE;
5750 :
5751 10786 : for (ovl_iterator iter (get_global_binding (ovl_op_identifier (false, code)));
5752 10786 : iter; ++iter)
5753 : {
5754 8832 : tree fn = *iter;
5755 : /* We're only interested in usual deallocation functions. */
5756 8832 : if (!usual_deallocation_fn_p (fn))
5757 1016 : continue;
5758 7816 : if (FUNCTION_ARG_CHAIN (fn) == void_list_node)
5759 : unsized = fn;
5760 : else
5761 5858 : sized = fn;
5762 : }
5763 1954 : if (DECL_INITIAL (unsized) && !DECL_INITIAL (sized))
5764 6 : warning_at (DECL_SOURCE_LOCATION (unsized), OPT_Wsized_deallocation,
5765 : "the program should also define %qD", sized);
5766 1948 : else if (!DECL_INITIAL (unsized) && DECL_INITIAL (sized))
5767 4 : warning_at (DECL_SOURCE_LOCATION (sized), OPT_Wsized_deallocation,
5768 : "the program should also define %qD", unsized);
5769 1954 : }
5770 :
5771 : /* Check the global deallocation functions to see if we want to warn about
5772 : defining unsized without sized (or vice versa). */
5773 :
5774 : static void
5775 99773 : maybe_warn_sized_delete ()
5776 : {
5777 99773 : if (!flag_sized_deallocation || !warn_sized_deallocation)
5778 : return;
5779 977 : maybe_warn_sized_delete (DELETE_EXPR);
5780 977 : maybe_warn_sized_delete (VEC_DELETE_EXPR);
5781 : }
5782 :
5783 : /* Earlier we left PTRMEM_CST in variable initializers alone so that we could
5784 : look them up when evaluating non-type template parameters. Now we need to
5785 : lower them to something the back end can understand. */
5786 :
5787 : static void
5788 99773 : lower_var_init ()
5789 : {
5790 99773 : varpool_node *node;
5791 34872514 : FOR_EACH_VARIABLE (node)
5792 : {
5793 34772741 : tree d = node->decl;
5794 34772741 : if (tree init = DECL_INITIAL (d))
5795 32247291 : DECL_INITIAL (d) = cplus_expand_constant (init);
5796 : }
5797 99773 : }
5798 :
5799 : /* This routine is called at the end of compilation.
5800 : Its job is to create all the code needed to initialize and
5801 : destroy the global aggregates. We do the destruction
5802 : first, since that way we only need to reverse the decls once. */
5803 :
5804 : void
5805 99885 : c_parse_final_cleanups (void)
5806 : {
5807 99885 : size_t i;
5808 99885 : tree decl;
5809 :
5810 99885 : locus_at_end_of_parsing = input_location;
5811 : /* We're done parsing. */
5812 99885 : at_eof = 1;
5813 :
5814 : /* Bad parse errors. Just forget about it. */
5815 199770 : if (! global_bindings_p () || current_class_type
5816 199770 : || !vec_safe_is_empty (decl_namespace_list))
5817 100 : return;
5818 :
5819 : /* This is the point to write out a PCH if we're doing that.
5820 : In that case we do not want to do anything else. */
5821 99882 : if (pch_file)
5822 : {
5823 : /* Mangle all symbols at PCH creation time. */
5824 97 : symtab_node *node;
5825 49600 : FOR_EACH_SYMBOL (node)
5826 49503 : if (! is_a <varpool_node *> (node)
5827 16342 : || ! DECL_HARD_REGISTER (node->decl))
5828 49503 : DECL_ASSEMBLER_NAME (node->decl);
5829 97 : c_common_write_pch ();
5830 97 : dump_tu ();
5831 : /* Ensure even the callers don't try to finalize the CU. */
5832 97 : flag_syntax_only = 1;
5833 97 : return;
5834 : }
5835 :
5836 99785 : timevar_stop (TV_PHASE_PARSING);
5837 99785 : timevar_start (TV_PHASE_DEFERRED);
5838 :
5839 99785 : symtab->process_same_body_aliases ();
5840 :
5841 : /* Handle -fdump-ada-spec[-slim] */
5842 99785 : if (flag_dump_ada_spec || flag_dump_ada_spec_slim)
5843 : {
5844 75 : collect_source_ref (main_input_filename);
5845 75 : if (!flag_dump_ada_spec_slim)
5846 75 : collect_source_refs (global_namespace);
5847 :
5848 75 : dump_ada_specs (collect_all_refs, cpp_check);
5849 : }
5850 :
5851 : /* FIXME - huh? was input_line -= 1;*/
5852 :
5853 : /* We now have to write out all the stuff we put off writing out.
5854 : These include:
5855 :
5856 : o Template specializations that we have not yet instantiated,
5857 : but which are needed.
5858 : o Initialization and destruction for non-local objects with
5859 : static storage duration. (Local objects with static storage
5860 : duration are initialized when their scope is first entered,
5861 : and are cleaned up via atexit.)
5862 : o Virtual function tables.
5863 :
5864 : All of these may cause others to be needed. For example,
5865 : instantiating one function may cause another to be needed, and
5866 : generating the initializer for an object may cause templates to be
5867 : instantiated, etc., etc. */
5868 :
5869 99785 : emit_support_tinfos ();
5870 :
5871 : /* Track vtables we want to emit that refer to consteval functions. */
5872 99785 : auto_vec<tree> consteval_vtables;
5873 :
5874 99785 : int retries = 0;
5875 99785 : unsigned ssdf_count = 0, omp_ssdf_count = 0;
5876 248209 : for (bool reconsider = true; reconsider; retries++)
5877 : {
5878 148436 : reconsider = false;
5879 :
5880 : /* If there are templates that we've put off instantiating, do
5881 : them now. */
5882 148436 : instantiate_pending_templates (retries);
5883 148424 : ggc_collect ();
5884 :
5885 148424 : if (header_module_p ())
5886 : /* A header modules initializations are handled in its
5887 : importer. */
5888 921 : continue;
5889 :
5890 : /* Emit wrappers where needed, and if that causes more to be added then
5891 : make sure we account for possible additional instantiations. */
5892 147503 : if (flag_contracts)
5893 32280 : if (emit_contract_wrapper_func (/*done*/false))
5894 147503 : reconsider = true;
5895 :
5896 : /* Write out virtual tables as required. Writing out the
5897 : virtual table for a template class may cause the
5898 : instantiation of members of that class. If we write out
5899 : vtables then we remove the class from our list so we don't
5900 : have to look at it again. */
5901 147503 : tree t;
5902 147503 : for (i = keyed_classes->length ();
5903 3924729 : keyed_classes->iterate (--i, &t);)
5904 3777226 : if (maybe_emit_vtables (t, consteval_vtables))
5905 : {
5906 359666 : reconsider = true;
5907 359666 : keyed_classes->unordered_remove (i);
5908 : }
5909 : /* The input_location may have been changed during marking of
5910 : vtable entries. */
5911 147503 : input_location = locus_at_end_of_parsing;
5912 :
5913 : /* Write out needed type info variables. We have to be careful
5914 : looping through unemitted decls, because emit_tinfo_decl may
5915 : cause other variables to be needed. New elements will be
5916 : appended, and we remove from the vector those that actually
5917 : get emitted. */
5918 147503 : for (i = unemitted_tinfo_decls->length ();
5919 6234983 : unemitted_tinfo_decls->iterate (--i, &t);)
5920 6087480 : if (DECL_INITIAL (t) || emit_tinfo_decl (t))
5921 : {
5922 448238 : reconsider = true;
5923 448238 : unemitted_tinfo_decls->unordered_remove (i);
5924 : }
5925 :
5926 : /* The list of objects with static storage duration is built up
5927 : in reverse order. We clear STATIC_AGGREGATES so that any new
5928 : aggregates added during the initialization of these will be
5929 : initialized in the correct order when we next come around the
5930 : loop. */
5931 147503 : if (tree vars = prune_vars_needing_no_initialization (&static_aggregates))
5932 : {
5933 5639 : if (flag_openmp)
5934 : /* Add initializer information from VARS into
5935 : DYNAMIC_INITIALIZERS. */
5936 394 : for (t = vars; t; t = TREE_CHAIN (t))
5937 566 : hash_map_safe_put<hm_ggc> (dynamic_initializers,
5938 283 : TREE_VALUE (t), TREE_PURPOSE (t));
5939 :
5940 : /* Make sure the back end knows about all the variables. */
5941 5639 : write_out_vars (vars);
5942 :
5943 5639 : function_depth++; // Disable GC
5944 5639 : priority_map_t *parts[4] = {nullptr, nullptr, nullptr, nullptr};
5945 5639 : partition_vars_for_init_fini (vars, parts);
5946 5639 : tree host_init_fini[2] = { NULL_TREE, NULL_TREE };
5947 :
5948 16917 : for (unsigned initp = 2; initp--;)
5949 11278 : if (parts[initp])
5950 16940 : for (auto iter : *parts[initp])
5951 : {
5952 5656 : auto list = iter.second;
5953 5656 : if (initp)
5954 : // Partitioning kept the vars in reverse order.
5955 : // We only want that for dtors.
5956 5647 : list = nreverse (list);
5957 5656 : host_init_fini[initp]
5958 5656 : = emit_partial_init_fini_fn (initp, iter.first, list,
5959 : ssdf_count++,
5960 : locus_at_end_of_parsing,
5961 : NULL_TREE);
5962 : }
5963 :
5964 5639 : if (flag_openmp)
5965 : {
5966 : priority_map_t **omp_parts = parts + 2;
5967 333 : for (unsigned initp = 2; initp--;)
5968 222 : if (omp_parts[initp])
5969 43 : for (auto iter : *omp_parts[initp])
5970 : {
5971 15 : auto list = iter.second;
5972 15 : if (initp)
5973 : // Partitioning kept the vars in reverse order.
5974 : // We only want that for dtors.
5975 15 : list = nreverse (list);
5976 15 : emit_partial_init_fini_fn (initp, iter.first, list,
5977 : omp_ssdf_count++,
5978 : locus_at_end_of_parsing,
5979 : host_init_fini[initp]);
5980 : }
5981 : }
5982 :
5983 5639 : function_depth--; // Re-enable GC
5984 :
5985 : /* All those initializations and finalizations might cause
5986 : us to need more inline functions, more template
5987 : instantiations, etc. */
5988 5639 : reconsider = true;
5989 : }
5990 :
5991 : /* Now do the same for thread_local variables. */
5992 147503 : handle_tls_init ();
5993 :
5994 : /* Go through the set of inline functions whose bodies have not
5995 : been emitted yet. If out-of-line copies of these functions
5996 : are required, emit them. */
5997 197868398 : FOR_EACH_VEC_SAFE_ELT (deferred_fns, i, decl)
5998 : {
5999 : /* Does it need synthesizing? */
6000 203508838 : if (DECL_DEFAULTED_FN (decl) && ! DECL_INITIAL (decl)
6001 197573398 : && (! DECL_REALLY_EXTERN (decl) || possibly_inlined_p (decl)))
6002 : {
6003 : /* Even though we're already at the top-level, we push
6004 : there again. That way, when we pop back a few lines
6005 : hence, all of our state is restored. Otherwise,
6006 : finish_function doesn't clean things up, and we end
6007 : up with CURRENT_FUNCTION_DECL set. */
6008 6 : push_to_top_level ();
6009 : /* The decl's location will mark where it was first
6010 : needed. Save that so synthesize method can indicate
6011 : where it was needed from, in case of error */
6012 6 : input_location = DECL_SOURCE_LOCATION (decl);
6013 6 : synthesize_method (decl);
6014 6 : pop_from_top_level ();
6015 6 : reconsider = true;
6016 : }
6017 :
6018 197573392 : if (!DECL_INITIAL (decl) && decl_tls_wrapper_p (decl))
6019 586 : generate_tls_wrapper (decl);
6020 :
6021 197573392 : if (!DECL_SAVED_TREE (decl))
6022 232485 : continue;
6023 :
6024 197340907 : cgraph_node *node = cgraph_node::get_create (decl);
6025 :
6026 : /* We lie to the back end, pretending that some functions
6027 : are not defined when they really are. This keeps these
6028 : functions from being put out unnecessarily. But, we must
6029 : stop lying when the functions are referenced, or if they
6030 : are not comdat since they need to be put out now. If
6031 : DECL_INTERFACE_KNOWN, then we have already set
6032 : DECL_EXTERNAL appropriately, so there's no need to check
6033 : again, and we do not want to clear DECL_EXTERNAL if a
6034 : previous call to import_export_decl set it.
6035 :
6036 : This is done in a separate for cycle, because if some
6037 : deferred function is contained in another deferred
6038 : function later in deferred_fns varray,
6039 : rest_of_compilation would skip this function and we
6040 : really cannot expand the same function twice. */
6041 197340907 : import_export_decl (decl);
6042 197340907 : if (DECL_NOT_REALLY_EXTERN (decl)
6043 190167161 : && DECL_INITIAL (decl)
6044 387508068 : && decl_needed_p (decl))
6045 : {
6046 124859600 : if (node->cpp_implicit_alias)
6047 11089685 : node = node->get_alias_target ();
6048 :
6049 124859600 : node->call_for_symbol_thunks_and_aliases (clear_decl_external,
6050 : NULL, true);
6051 : /* If we mark !DECL_EXTERNAL one of the symbols in some comdat
6052 : group, we need to mark all symbols in the same comdat group
6053 : that way. */
6054 124859600 : if (node->same_comdat_group)
6055 32718988 : for (cgraph_node *next
6056 16134905 : = dyn_cast<cgraph_node *> (node->same_comdat_group);
6057 32718988 : next != node;
6058 33168166 : next = dyn_cast<cgraph_node *> (next->same_comdat_group))
6059 16584083 : next->call_for_symbol_thunks_and_aliases (clear_decl_external,
6060 : NULL, true);
6061 : }
6062 :
6063 : /* If we're going to need to write this function out, and
6064 : there's already a body for it, create RTL for it now.
6065 : (There might be no body if this is a method we haven't
6066 : gotten around to synthesizing yet.) */
6067 197340907 : if (!DECL_EXTERNAL (decl)
6068 128013865 : && decl_needed_p (decl)
6069 125591478 : && !TREE_ASM_WRITTEN (decl)
6070 230078556 : && !DECL_IMMEDIATE_FUNCTION_P (decl)
6071 306581446 : && !node->definition)
6072 : {
6073 : /* We will output the function; no longer consider it in this
6074 : loop. */
6075 0 : DECL_DEFER_OUTPUT (decl) = 0;
6076 : /* Generate RTL for this function now that we know we
6077 : need it. */
6078 0 : expand_or_defer_fn (decl);
6079 0 : reconsider = true;
6080 : }
6081 : }
6082 :
6083 147503 : if (wrapup_namespace_globals ())
6084 613 : reconsider = true;
6085 :
6086 : /* Static data members are just like namespace-scope globals. */
6087 103921976 : FOR_EACH_VEC_SAFE_ELT (pending_statics, i, decl)
6088 : {
6089 : /* Rewrite the REFLECT_EXPR with 0 so that the ME can process it. */
6090 103774473 : if (flag_reflection && DECL_INITIAL (decl))
6091 2309056 : rewrite_null_reflection (DECL_INITIAL (decl));
6092 :
6093 103774473 : if (consteval_only_p (decl)
6094 103774171 : || var_finalized_p (decl)
6095 26924751 : || DECL_REALLY_EXTERN (decl)
6096 : /* Don't write it out if we haven't seen a definition. */
6097 119282986 : || DECL_IN_AGGR_P (decl))
6098 88273183 : continue;
6099 15501290 : import_export_decl (decl);
6100 : /* If this static data member is needed, provide it to the
6101 : back end. */
6102 15501290 : if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
6103 15469642 : DECL_EXTERNAL (decl) = 0;
6104 : }
6105 :
6106 295927 : if (vec_safe_length (pending_statics) != 0
6107 121942 : && wrapup_global_declarations (pending_statics->address (),
6108 60971 : pending_statics->length ()))
6109 : reconsider = true;
6110 : }
6111 :
6112 99773 : if (flag_contracts)
6113 : {
6114 25208 : emit_contract_wrapper_func (/*done*/true);
6115 25208 : maybe_emit_violation_handler_wrappers ();
6116 : }
6117 :
6118 : /* All templates have been instantiated. */
6119 99773 : at_eof = 2;
6120 :
6121 99773 : void *module_cookie = finish_module_processing (parse_in);
6122 :
6123 99773 : lower_var_init ();
6124 :
6125 99773 : generate_mangling_aliases ();
6126 :
6127 : /* All used inline functions must have a definition at this point. */
6128 52082750 : FOR_EACH_VEC_SAFE_ELT (deferred_fns, i, decl)
6129 : {
6130 51883204 : if (/* Check online inline functions that were actually used. */
6131 84578341 : DECL_ODR_USED (decl) && DECL_DECLARED_INLINE_P (decl)
6132 : /* If the definition actually was available here, then the
6133 : fact that the function was not defined merely represents
6134 : that for some reason (use of a template repository,
6135 : #pragma interface, etc.) we decided not to emit the
6136 : definition here. */
6137 32693713 : && !DECL_INITIAL (decl)
6138 : /* A defaulted fn or TLS wrapper in a header module can be
6139 : synthesized on demand later. (In non-header modules we
6140 : should have synthesized it above.) */
6141 9447 : && !(header_module_p ()
6142 16 : && (DECL_DEFAULTED_FN (decl) || decl_tls_wrapper_p (decl)))
6143 : /* Metafunctions are never defined. */
6144 9441 : && !metafunction_p (decl)
6145 : /* Don't complain if the template was defined. */
6146 771 : && !(DECL_TEMPLOID_INSTANTIATION (decl)
6147 685 : && DECL_INITIAL (DECL_TEMPLATE_RESULT
6148 : (template_for_substitution (decl))))
6149 84578341 : && warning_at (DECL_SOURCE_LOCATION (decl), 0,
6150 : "inline function %qD used but never defined", decl))
6151 : /* Avoid a duplicate warning from check_global_declaration. */
6152 83 : suppress_warning (decl, OPT_Wunused);
6153 : }
6154 :
6155 : /* So must decls that use a type with no linkage. */
6156 646327 : FOR_EACH_VEC_SAFE_ELT (no_linkage_decls, i, decl)
6157 546554 : no_linkage_error (decl);
6158 :
6159 99773 : maybe_warn_sized_delete ();
6160 :
6161 : // Place the init fns in the right order. We need to do this now,
6162 : // so that any module init will go at the start.
6163 99773 : if (static_init_fini_fns[true])
6164 16904 : for (auto iter : *static_init_fini_fns[true])
6165 5644 : iter.second = nreverse (iter.second);
6166 :
6167 99773 : if (flag_openmp && static_init_fini_fns[2 + true])
6168 43 : for (auto iter : *static_init_fini_fns[2 + true])
6169 15 : iter.second = nreverse (iter.second);
6170 :
6171 : /* Now we've instantiated all templates. Now we can escalate the functions
6172 : we squirreled away earlier. */
6173 99773 : process_and_check_pending_immediate_escalating_fns ();
6174 :
6175 : /* Then, do the Objective-C stuff. This is where all the
6176 : Objective-C module stuff gets generated (symtab,
6177 : class/protocol/selector lists etc). This must be done after C++
6178 : templates, destructors etc. so that selectors used in C++
6179 : templates are properly allocated. */
6180 99773 : if (c_dialect_objc ())
6181 0 : objc_write_global_declarations ();
6182 :
6183 99773 : bool has_module_inits = module_determine_import_inits ();
6184 99773 : bool has_objc_init = c_dialect_objc () && objc_static_init_needed_p ();
6185 99773 : if (has_module_inits || has_objc_init)
6186 : {
6187 55 : input_location = locus_at_end_of_parsing;
6188 55 : tree body = start_partial_init_fini_fn (true, DEFAULT_INIT_PRIORITY,
6189 : ssdf_count++, false);
6190 : /* For Objective-C++, we may need to initialize metadata found
6191 : in this module. This must be done _before_ any other static
6192 : initializations. */
6193 55 : if (has_objc_init)
6194 0 : objc_generate_static_init_call (NULL_TREE);
6195 55 : if (has_module_inits)
6196 55 : module_add_import_initializers ();
6197 55 : input_location = locus_at_end_of_parsing;
6198 55 : finish_partial_init_fini_fn (body);
6199 : }
6200 :
6201 99773 : if (module_global_init_needed ())
6202 : {
6203 : // Make sure there's a default priority entry.
6204 2014 : if (!static_init_fini_fns[true])
6205 1941 : static_init_fini_fns[true] = priority_map_t::create_ggc ();
6206 2014 : if (static_init_fini_fns[true]->get_or_insert (DEFAULT_INIT_PRIORITY))
6207 99773 : has_module_inits = true;
6208 :
6209 : /* FIXME: We need to work out what static constructors on OpenMP offload
6210 : target in modules will look like. */
6211 : }
6212 :
6213 : /* Generate initialization and destruction functions for all
6214 : priorities for which they are required. They have C-language
6215 : linkage. */
6216 99773 : push_lang_context (lang_name_c);
6217 598638 : for (unsigned initp = 4; initp--;)
6218 399092 : if (static_init_fini_fns[initp])
6219 : {
6220 15289 : for (auto iter : *static_init_fini_fns[initp])
6221 7652 : generate_ctor_or_dtor_function (initp & 1, iter.first, iter.second,
6222 : locus_at_end_of_parsing,
6223 7652 : (initp & 2) != 0);
6224 7637 : static_init_fini_fns[initp] = nullptr;
6225 : }
6226 99773 : pop_lang_context ();
6227 :
6228 99773 : fini_modules (parse_in, module_cookie, has_module_inits);
6229 :
6230 : /* Generate any missing aliases. */
6231 99773 : maybe_apply_pending_pragma_weaks ();
6232 :
6233 99773 : if (flag_vtable_verify)
6234 : {
6235 9 : vtv_recover_class_info ();
6236 9 : vtv_compute_class_hierarchy_transitive_closure ();
6237 9 : vtv_build_vtable_verify_fndecl ();
6238 : }
6239 :
6240 99773 : perform_deferred_noexcept_checks ();
6241 :
6242 99773 : fini_constexpr ();
6243 99773 : cp_tree_c_finish_parsing ();
6244 99773 : clear_consteval_vfns (consteval_vtables);
6245 :
6246 : /* The entire file is now complete. If requested, dump everything
6247 : to a file. */
6248 99773 : dump_tu ();
6249 :
6250 99773 : if (flag_detailed_statistics)
6251 : {
6252 0 : dump_tree_statistics ();
6253 0 : dump_time_statistics ();
6254 : }
6255 :
6256 99773 : timevar_stop (TV_PHASE_DEFERRED);
6257 99773 : timevar_start (TV_PHASE_PARSING);
6258 :
6259 : /* Indicate that we're done with front end processing. */
6260 99773 : at_eof = 3;
6261 99773 : }
6262 :
6263 : /* Perform any post compilation-proper cleanups for the C++ front-end.
6264 : This should really go away. No front-end should need to do
6265 : anything past the compilation process. */
6266 :
6267 : void
6268 99528 : cxx_post_compilation_parsing_cleanups (void)
6269 : {
6270 99528 : timevar_start (TV_PHASE_LATE_PARSING_CLEANUPS);
6271 :
6272 99528 : if (flag_vtable_verify)
6273 : {
6274 : /* Generate the special constructor initialization function that
6275 : calls __VLTRegisterPairs, and give it a very high
6276 : initialization priority. This must be done after
6277 : finalize_compilation_unit so that we have accurate
6278 : information about which vtable will actually be emitted. */
6279 9 : vtv_generate_init_routine ();
6280 : }
6281 :
6282 99528 : input_location = locus_at_end_of_parsing;
6283 :
6284 99528 : if (flag_checking)
6285 99519 : validate_conversion_obstack ();
6286 :
6287 99528 : timevar_stop (TV_PHASE_LATE_PARSING_CLEANUPS);
6288 99528 : }
6289 :
6290 : /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
6291 : function to call in parse-tree form; it has not yet been
6292 : semantically analyzed. ARGS are the arguments to the function.
6293 : They have already been semantically analyzed. This may change
6294 : ARGS. */
6295 :
6296 : tree
6297 379985 : build_offset_ref_call_from_tree (tree fn, vec<tree, va_gc> **args,
6298 : tsubst_flags_t complain)
6299 : {
6300 379985 : tree orig_fn;
6301 379985 : vec<tree, va_gc> *orig_args = NULL;
6302 379985 : tree expr;
6303 379985 : tree object;
6304 :
6305 379985 : orig_fn = fn;
6306 379985 : object = TREE_OPERAND (fn, 0);
6307 :
6308 379985 : if (processing_template_decl)
6309 : {
6310 292799 : gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
6311 : || TREE_CODE (fn) == MEMBER_REF);
6312 292799 : if (type_dependent_expression_p (fn)
6313 292799 : || any_type_dependent_arguments_p (*args))
6314 292760 : return build_min_nt_call_vec (fn, *args);
6315 :
6316 39 : orig_args = make_tree_vector_copy (*args);
6317 :
6318 : /* Transform the arguments and add the implicit "this"
6319 : parameter. */
6320 39 : if (TREE_CODE (TREE_TYPE (fn)) == METHOD_TYPE)
6321 : {
6322 33 : if (TREE_CODE (fn) == DOTSTAR_EXPR)
6323 27 : object = cp_build_addr_expr (object, complain);
6324 33 : vec_safe_insert (*args, 0, object);
6325 : }
6326 : }
6327 :
6328 : /* A qualified name corresponding to a bound pointer-to-member is
6329 : represented as an OFFSET_REF:
6330 :
6331 : struct B { void g(); };
6332 : void (B::*p)();
6333 : void B::g() { (this->*p)(); } */
6334 87225 : if (TREE_CODE (fn) == OFFSET_REF)
6335 : {
6336 87186 : tree object_addr = cp_build_addr_expr (object, complain);
6337 87186 : fn = TREE_OPERAND (fn, 1);
6338 87186 : fn = get_member_function_from_ptrfunc (&object_addr, fn,
6339 : complain);
6340 87186 : vec_safe_insert (*args, 0, object_addr);
6341 : }
6342 :
6343 87225 : if (CLASS_TYPE_P (TREE_TYPE (fn)))
6344 3 : expr = build_op_call (fn, args, complain);
6345 : else
6346 87222 : expr = cp_build_function_call_vec (fn, args, complain);
6347 87225 : if (processing_template_decl && expr != error_mark_node)
6348 39 : expr = build_min_non_dep_call_vec (expr, orig_fn, orig_args);
6349 :
6350 87225 : if (orig_args != NULL)
6351 39 : release_tree_vector (orig_args);
6352 :
6353 : return expr;
6354 : }
6355 :
6356 :
6357 : void
6358 375592472 : check_default_args (tree x)
6359 : {
6360 375592472 : tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
6361 375592472 : bool saw_def = false;
6362 375592472 : bool noted_first_def = false;
6363 375592472 : int idx_of_first_default_arg = 0;
6364 375592472 : location_t loc_of_first_default_arg = UNKNOWN_LOCATION;
6365 375592472 : int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
6366 375592472 : tree fndecl = STRIP_TEMPLATE (x);
6367 375592472 : auto_diagnostic_group d;
6368 1400750566 : for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
6369 : {
6370 649565622 : if (TREE_PURPOSE (arg))
6371 : {
6372 12204946 : if (!saw_def)
6373 : {
6374 9163769 : saw_def = true;
6375 9163769 : idx_of_first_default_arg = i;
6376 9163769 : location_t loc = get_fndecl_argument_location (fndecl, i);
6377 9163769 : if (loc != DECL_SOURCE_LOCATION (x))
6378 9163729 : loc_of_first_default_arg = loc;
6379 : }
6380 : }
6381 637360676 : else if (saw_def && !PACK_EXPANSION_P (TREE_VALUE (arg)))
6382 : {
6383 147 : error_at (get_fndecl_argument_location (fndecl, i),
6384 : "default argument missing for parameter %P of %q#D", i, x);
6385 147 : if (loc_of_first_default_arg != UNKNOWN_LOCATION
6386 147 : && !noted_first_def)
6387 : {
6388 144 : inform (loc_of_first_default_arg,
6389 : "...following parameter %P which has a default argument",
6390 : idx_of_first_default_arg);
6391 144 : noted_first_def = true;
6392 : }
6393 147 : TREE_PURPOSE (arg) = error_mark_node;
6394 : }
6395 : }
6396 375592472 : }
6397 :
6398 : /* Return true if function DECL can be inlined. This is used to force
6399 : instantiation of methods that might be interesting for inlining. */
6400 : bool
6401 3 : possibly_inlined_p (tree decl)
6402 : {
6403 3 : gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
6404 3 : if (DECL_UNINLINABLE (decl))
6405 : return false;
6406 3 : if (!optimize)
6407 3 : return DECL_DECLARED_INLINE_P (decl);
6408 : /* When optimizing, we might inline everything when flatten
6409 : attribute or heuristics inlining for size or autoinlining
6410 : is used. */
6411 : return true;
6412 : }
6413 :
6414 : /* If DECL is a function or variable template specialization, instantiate
6415 : its definition now. */
6416 :
6417 : void
6418 181233109 : maybe_instantiate_decl (tree decl)
6419 : {
6420 730938 : if (VAR_OR_FUNCTION_DECL_P (decl)
6421 181233109 : && DECL_LANG_SPECIFIC (decl)
6422 137991759 : && DECL_TEMPLATE_INFO (decl)
6423 289042509 : && !uses_template_parms (DECL_TI_ARGS (decl)))
6424 : {
6425 : /* Instantiating a function will result in garbage collection. We
6426 : must treat this situation as if we were within the body of a
6427 : function so as to avoid collecting live data only referenced from
6428 : the stack (such as overload resolution candidates). */
6429 103142127 : ++function_depth;
6430 103142127 : instantiate_decl (decl, /*defer_ok=*/false,
6431 : /*expl_inst_class_mem_p=*/false);
6432 103139430 : --function_depth;
6433 : }
6434 181230412 : }
6435 :
6436 : /* Error if the DECL is unavailable (unless this is currently suppressed).
6437 : Maybe warn if DECL is deprecated, subject to COMPLAIN. Returns true if
6438 : an error or warning was emitted. */
6439 :
6440 : bool
6441 4308309223 : cp_handle_deprecated_or_unavailable (tree decl, tsubst_flags_t complain)
6442 : {
6443 4308309223 : if (!decl)
6444 : return false;
6445 :
6446 4267685097 : if ((complain & tf_error)
6447 3889729455 : && deprecated_state != UNAVAILABLE_DEPRECATED_SUPPRESS)
6448 : {
6449 3135044774 : if (TREE_UNAVAILABLE (decl))
6450 : {
6451 252 : error_unavailable_use (decl, NULL_TREE);
6452 252 : return true;
6453 : }
6454 : else
6455 : {
6456 : /* Perhaps this is an unavailable typedef. */
6457 3135044522 : if (TYPE_P (decl)
6458 832590634 : && TYPE_NAME (decl)
6459 3961003072 : && TREE_UNAVAILABLE (TYPE_NAME (decl)))
6460 : {
6461 6 : decl = TYPE_NAME (decl);
6462 : /* Don't error within members of a unavailable type. */
6463 6 : if (TYPE_P (decl)
6464 6 : && currently_open_class (decl))
6465 : return false;
6466 :
6467 6 : error_unavailable_use (decl, NULL_TREE);
6468 6 : return true;
6469 : }
6470 : }
6471 : /* Carry on to consider deprecatedness. */
6472 : }
6473 :
6474 4267684839 : if (!(complain & tf_warning)
6475 3844107502 : || deprecated_state == DEPRECATED_SUPPRESS
6476 3841601211 : || deprecated_state == UNAVAILABLE_DEPRECATED_SUPPRESS)
6477 : return false;
6478 :
6479 3092585837 : if (!TREE_DEPRECATED (decl))
6480 : {
6481 : /* Perhaps this is a deprecated typedef. */
6482 3091905154 : if (TYPE_P (decl) && TYPE_NAME (decl))
6483 824500847 : decl = TYPE_NAME (decl);
6484 :
6485 3091905154 : if (!TREE_DEPRECATED (decl))
6486 : return false;
6487 : }
6488 :
6489 : /* Don't warn within members of a deprecated type. */
6490 680691 : if (TYPE_P (decl)
6491 680691 : && currently_open_class (decl))
6492 : return false;
6493 :
6494 182259 : bool warned = false;
6495 182259 : if (cxx_dialect >= cxx11
6496 182168 : && DECL_P (decl)
6497 182041 : && DECL_ARTIFICIAL (decl)
6498 21310 : && DECL_IOBJ_MEMBER_FUNCTION_P (decl)
6499 203569 : && copy_fn_p (decl))
6500 : {
6501 : /* Don't warn if the flag was disabled around the class definition
6502 : (c++/94492). */
6503 21298 : if (warning_enabled_at (DECL_SOURCE_LOCATION (decl),
6504 21298 : OPT_Wdeprecated_copy))
6505 : {
6506 20 : auto_diagnostic_group d;
6507 20 : tree ctx = DECL_CONTEXT (decl);
6508 20 : tree other = classtype_has_depr_implicit_copy (ctx);
6509 20 : int opt = (DECL_DESTRUCTOR_P (other)
6510 20 : ? OPT_Wdeprecated_copy_dtor
6511 0 : : OPT_Wdeprecated_copy);
6512 20 : warned = warning (opt, "implicitly-declared %qD is deprecated",
6513 : decl);
6514 20 : if (warned)
6515 4 : inform (DECL_SOURCE_LOCATION (other),
6516 : "because %qT has user-provided %qD",
6517 : ctx, other);
6518 20 : }
6519 : }
6520 : else
6521 : {
6522 160961 : if (!warning_suppressed_at (input_location,
6523 : OPT_Wdeprecated_declarations))
6524 154269 : warned = warn_deprecated_use (decl, NULL_TREE);
6525 160961 : suppress_warning_at (input_location, OPT_Wdeprecated_declarations);
6526 : }
6527 :
6528 : return warned;
6529 : }
6530 :
6531 : /* Like above, but takes into account outer scopes. */
6532 :
6533 : void
6534 1594422771 : cp_warn_deprecated_use_scopes (tree scope)
6535 : {
6536 1594422771 : while (scope
6537 2801799795 : && scope != error_mark_node
6538 5603599555 : && scope != global_namespace)
6539 : {
6540 269172313 : if ((TREE_CODE (scope) == NAMESPACE_DECL || OVERLOAD_TYPE_P (scope))
6541 1459016286 : && cp_handle_deprecated_or_unavailable (scope))
6542 : return;
6543 1207377024 : if (TYPE_P (scope))
6544 253461656 : scope = CP_TYPE_CONTEXT (scope);
6545 : else
6546 953915368 : scope = CP_DECL_CONTEXT (scope);
6547 : }
6548 : }
6549 :
6550 : /* True if DECL or its enclosing scope have unbound template parameters. */
6551 :
6552 : bool
6553 522089622 : decl_dependent_p (tree decl)
6554 : {
6555 522089622 : tree orig_decl = decl;
6556 1043528600 : if (DECL_FUNCTION_SCOPE_P (decl)
6557 235991894 : || TREE_CODE (decl) == CONST_DECL
6558 235991894 : || TREE_CODE (decl) == USING_DECL
6559 758081516 : || TREE_CODE (decl) == FIELD_DECL)
6560 286097728 : decl = CP_DECL_CONTEXT (decl);
6561 522089622 : if (tree tinfo = get_template_info (decl))
6562 450788991 : if (any_dependent_template_arguments_p (TI_ARGS (tinfo)))
6563 : return true;
6564 342146805 : if (LAMBDA_FUNCTION_P (decl)
6565 340529696 : && dependent_type_p (DECL_CONTEXT (decl)))
6566 : return true;
6567 : /* for-range-declaration of expansion statement as well as variable
6568 : declarations in the expansion statement body when the expansion statement
6569 : is not inside a template still need to be treated as dependent during
6570 : parsing. When the body is instantiated, in_expansion_stmt will be already
6571 : false. */
6572 338868744 : if (VAR_P (orig_decl) && in_expansion_stmt && decl == current_function_decl)
6573 550 : return true;
6574 : return false;
6575 : }
6576 :
6577 : /* [basic.def.odr] A function is named [and therefore odr-used] by an
6578 : expression or conversion if it is the selected member of an overload set in
6579 : an overload resolution performed as part of forming that expression or
6580 : conversion, unless it is a pure virtual function and either the expression
6581 : is not an id-expression naming the function with an explicitly qualified
6582 : name or the expression forms a pointer to member.
6583 :
6584 : Mostly, we call mark_used in places that actually do something with a
6585 : function, like build_over_call. But in a few places we end up with a
6586 : non-overloaded FUNCTION_DECL that we aren't going to do any more with, like
6587 : convert_to_void. resolve_nondeduced_context is called in those places,
6588 : but it's also called in too many other places. */
6589 :
6590 : bool
6591 484448924 : mark_single_function (tree expr, tsubst_flags_t complain)
6592 : {
6593 484448924 : expr = maybe_undo_parenthesized_ref (expr);
6594 484448924 : expr = tree_strip_any_location_wrapper (expr);
6595 :
6596 484448924 : if (expr == error_mark_node)
6597 : return false;
6598 :
6599 484448075 : if (is_overloaded_fn (expr) == 1
6600 130858168 : && !mark_used (expr, complain)
6601 484448110 : && !(complain & tf_error))
6602 15 : return false;
6603 : return true;
6604 : }
6605 :
6606 : /* True iff we have started, but not finished, defining FUNCTION_DECL DECL. */
6607 :
6608 : bool
6609 100919178 : fn_being_defined (tree decl)
6610 : {
6611 : /* DECL_INITIAL is set to error_mark_node in grokfndecl for a definition, and
6612 : changed to BLOCK by poplevel at the end of the function. */
6613 100919178 : return (TREE_CODE (decl) == FUNCTION_DECL
6614 100919178 : && DECL_INITIAL (decl) == error_mark_node);
6615 : }
6616 :
6617 : /* True if DECL is an instantiation of a function template currently being
6618 : defined. */
6619 :
6620 : bool
6621 338868194 : fn_template_being_defined (tree decl)
6622 : {
6623 338868194 : if (TREE_CODE (decl) != FUNCTION_DECL
6624 165289573 : || !DECL_LANG_SPECIFIC (decl)
6625 165289573 : || !DECL_TEMPLOID_INSTANTIATION (decl)
6626 477096281 : || DECL_TEMPLATE_INSTANTIATED (decl))
6627 : return false;
6628 100919178 : tree tinfo = DECL_TEMPLATE_INFO (decl);
6629 100919178 : tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
6630 100919178 : return fn_being_defined (pattern);
6631 : }
6632 :
6633 : /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
6634 : If DECL is a specialization or implicitly declared class member,
6635 : generate the actual definition. Return false if something goes
6636 : wrong, true otherwise. */
6637 :
6638 : bool
6639 1437195585 : mark_used (tree decl, tsubst_flags_t complain /* = tf_warning_or_error */)
6640 : {
6641 1437195585 : if (decl == error_mark_node)
6642 : return false;
6643 :
6644 : /* If we're just testing conversions or resolving overloads, we
6645 : don't want any permanent effects like forcing functions to be
6646 : output or instantiating templates. */
6647 1437195435 : if ((complain & tf_conv))
6648 : return true;
6649 :
6650 : /* If DECL is a BASELINK for a single function, then treat it just
6651 : like the DECL for the function. Otherwise, if the BASELINK is
6652 : for an overloaded function, we don't know which function was
6653 : actually used until after overload resolution. */
6654 1437152781 : if (BASELINK_P (decl))
6655 : {
6656 12542 : tree fns = BASELINK_FUNCTIONS (decl);
6657 12542 : if (really_overloaded_fn (fns))
6658 : return true;
6659 12430 : fns = OVL_FIRST (fns);
6660 12430 : if (!mark_used (fns, complain))
6661 : return false;
6662 : /* We might have deduced its return type. */
6663 12421 : TREE_TYPE (decl) = TREE_TYPE (fns);
6664 12421 : return true;
6665 : }
6666 :
6667 1437140239 : if (!DECL_P (decl))
6668 : return true;
6669 :
6670 : /* Set TREE_USED for the benefit of -Wunused. */
6671 1436125076 : TREE_USED (decl) = true;
6672 :
6673 : /* And for structured bindings also the underlying decl. */
6674 1436125076 : if (DECL_DECOMPOSITION_P (decl) && !DECL_DECOMP_IS_BASE (decl))
6675 1002826 : TREE_USED (DECL_DECOMP_BASE (decl)) = true;
6676 :
6677 1436125076 : if (TREE_CODE (decl) == TEMPLATE_DECL)
6678 : return true;
6679 :
6680 1436112207 : if (DECL_CLONED_FUNCTION_P (decl))
6681 21826833 : TREE_USED (DECL_CLONED_FUNCTION (decl)) = 1;
6682 :
6683 : /* Mark enumeration types as used. */
6684 1436112207 : if (TREE_CODE (decl) == CONST_DECL)
6685 36176173 : used_types_insert (DECL_CONTEXT (decl));
6686 :
6687 1436112207 : if (TREE_CODE (decl) == FUNCTION_DECL)
6688 : {
6689 328978912 : if (DECL_MAYBE_DELETED (decl))
6690 : {
6691 36728 : ++function_depth;
6692 36728 : maybe_synthesize_method (decl);
6693 36728 : --function_depth;
6694 : }
6695 :
6696 328978912 : if (DECL_DELETED_FN (decl))
6697 : {
6698 2874 : if (DECL_ARTIFICIAL (decl)
6699 1917 : && DECL_CONV_FN_P (decl)
6700 2886 : && LAMBDA_TYPE_P (DECL_CONTEXT (decl)))
6701 : /* We mark a lambda conversion op as deleted if we can't
6702 : generate it properly; see maybe_add_lambda_conv_op. */
6703 6 : sorry ("converting lambda that uses %<...%> to function pointer");
6704 2868 : else if (complain & tf_error)
6705 : {
6706 2422 : auto_diagnostic_group d;
6707 2422 : if (DECL_INITIAL (decl)
6708 2422 : && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST)
6709 : {
6710 25 : escaped_string msg;
6711 25 : msg.escape (TREE_STRING_POINTER (DECL_INITIAL (decl)));
6712 25 : error ("use of deleted function %qD: %s",
6713 : decl, (const char *) msg);
6714 25 : }
6715 : else
6716 2397 : error ("use of deleted function %qD", decl);
6717 2422 : if (!maybe_explain_implicit_delete (decl))
6718 679 : inform (DECL_SOURCE_LOCATION (decl), "declared here");
6719 2422 : }
6720 : return false;
6721 : }
6722 :
6723 328976038 : if (!maybe_instantiate_noexcept (decl, complain))
6724 : return false;
6725 : }
6726 :
6727 1436109246 : if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_LOCAL_DECL_P (decl))
6728 : {
6729 75092 : if (!DECL_LANG_SPECIFIC (decl))
6730 : /* An unresolved dependent local extern. */
6731 : return true;
6732 :
6733 75092 : DECL_ODR_USED (decl) = 1;
6734 75092 : auto alias = DECL_LOCAL_DECL_ALIAS (decl);
6735 75092 : if (!alias || alias == error_mark_node)
6736 : return true;
6737 :
6738 : /* Process the underlying decl. */
6739 74800 : decl = alias;
6740 74800 : TREE_USED (decl) = true;
6741 : }
6742 :
6743 1436108954 : cp_handle_deprecated_or_unavailable (decl, complain);
6744 :
6745 : /* We can only check DECL_ODR_USED on variables or functions with
6746 : DECL_LANG_SPECIFIC set, and these are also the only decls that we
6747 : might need special handling for. */
6748 831676670 : if (!VAR_OR_FUNCTION_DECL_P (decl)
6749 1765084883 : || DECL_THUNK_P (decl))
6750 : return true;
6751 :
6752 : /* We only want to do this processing once. We don't need to keep trying
6753 : to instantiate inline templates, because unit-at-a-time will make sure
6754 : we get them compiled before functions that want to inline them. */
6755 933399415 : if (DECL_LANG_SPECIFIC (decl) && DECL_ODR_USED (decl))
6756 : return true;
6757 :
6758 516115240 : if (flag_concepts && TREE_CODE (decl) == FUNCTION_DECL
6759 686863806 : && !constraints_satisfied_p (decl))
6760 : {
6761 15 : if (complain & tf_error)
6762 : {
6763 6 : auto_diagnostic_group d;
6764 6 : error ("use of function %qD with unsatisfied constraints",
6765 : decl);
6766 6 : location_t loc = DECL_SOURCE_LOCATION (decl);
6767 6 : inform (loc, "declared here");
6768 6 : diagnose_constraints (loc, decl, NULL_TREE);
6769 6 : }
6770 : return false;
6771 : }
6772 :
6773 : /* If DECL has a deduced return type, we need to instantiate it now to
6774 : find out its type. For OpenMP user defined reductions, we need them
6775 : instantiated for reduction clauses which inline them by hand directly.
6776 : OpenMP declared mappers are used implicitly so must be instantiated
6777 : before they can be detected. */
6778 522089622 : if (undeduced_auto_decl (decl)
6779 492504357 : || (VAR_P (decl)
6780 327073848 : && VAR_HAD_UNKNOWN_BOUND (decl))
6781 492483914 : || (TREE_CODE (decl) == FUNCTION_DECL
6782 165430509 : && DECL_OMP_DECLARE_REDUCTION_P (decl))
6783 1014573270 : || (TREE_CODE (decl) == VAR_DECL
6784 327053405 : && DECL_LANG_SPECIFIC (decl)
6785 78628249 : && DECL_OMP_DECLARE_MAPPER_P (decl)))
6786 29606083 : maybe_instantiate_decl (decl);
6787 :
6788 522089622 : if (!decl_dependent_p (decl)
6789 : /* Don't require this yet for an instantiation of a function template
6790 : we're currently defining (c++/120555). */
6791 338868194 : && !fn_template_being_defined (decl)
6792 860832193 : && !require_deduced_type (decl, complain))
6793 : return false;
6794 :
6795 522087600 : if (DECL_LANG_SPECIFIC (decl) == NULL)
6796 : return true;
6797 :
6798 245559472 : if (processing_template_decl || in_template_context)
6799 : return true;
6800 :
6801 : /* Check this too in case we're within instantiate_non_dependent_expr. */
6802 187986805 : if (DECL_TEMPLATE_INFO (decl)
6803 187986805 : && uses_template_parms (DECL_TI_ARGS (decl)))
6804 : return true;
6805 :
6806 187986805 : if (builtin_pack_fn_p (decl))
6807 : {
6808 12 : if (complain & tf_error)
6809 6 : error ("use of built-in parameter pack %qD outside of a template",
6810 6 : DECL_NAME (decl));
6811 : return false;
6812 : }
6813 :
6814 : /* If we don't need a value, then we don't need to synthesize DECL. */
6815 187986793 : if (cp_unevaluated_operand || in_discarded_stmt)
6816 : return true;
6817 :
6818 50980255 : DECL_ODR_USED (decl) = 1;
6819 50980255 : if (DECL_CLONED_FUNCTION_P (decl))
6820 7646862 : DECL_ODR_USED (DECL_CLONED_FUNCTION (decl)) = 1;
6821 :
6822 : /* DR 757: A type without linkage shall not be used as the type of a
6823 : variable or function with linkage, unless
6824 : o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
6825 : o the variable or function is not used (3.2 [basic.def.odr]) or is
6826 : defined in the same translation unit. */
6827 50980255 : if (cxx_dialect > cxx98
6828 50756448 : && decl_linkage (decl) != lk_none
6829 47663885 : && !DECL_EXTERN_C_P (decl)
6830 42900739 : && !DECL_ARTIFICIAL (decl)
6831 41055143 : && !decl_defined_p (decl)
6832 81689250 : && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
6833 546652 : vec_safe_push (no_linkage_decls, decl);
6834 :
6835 50980255 : if (TREE_CODE (decl) == FUNCTION_DECL
6836 39691537 : && DECL_DECLARED_INLINE_P (decl)
6837 30627507 : && !DECL_INITIAL (decl)
6838 20553420 : && !DECL_ARTIFICIAL (decl)
6839 70930626 : && !DECL_PURE_VIRTUAL_P (decl))
6840 : /* Remember it, so we can check it was defined. */
6841 19947901 : note_vague_linkage_fn (decl);
6842 :
6843 : /* Is it a synthesized method that needs to be synthesized? */
6844 50980255 : if (TREE_CODE (decl) == FUNCTION_DECL
6845 39691537 : && DECL_DEFAULTED_FN (decl)
6846 : /* A function defaulted outside the class is synthesized either by
6847 : cp_finish_decl or instantiate_decl. */
6848 1436967 : && !DECL_DEFAULTED_OUTSIDE_CLASS_P (decl)
6849 52416986 : && ! DECL_INITIAL (decl))
6850 : {
6851 : /* Remember the current location for a function we will end up
6852 : synthesizing. Then we can inform the user where it was
6853 : required in the case of error. */
6854 1230352 : if (decl_remember_implicit_trigger_p (decl))
6855 546536 : DECL_SOURCE_LOCATION (decl) = input_location;
6856 :
6857 : /* Synthesizing an implicitly defined member function will result in
6858 : garbage collection. We must treat this situation as if we were
6859 : within the body of a function so as to avoid collecting live data
6860 : on the stack (such as overload resolution candidates).
6861 :
6862 : We could just let c_parse_final_cleanups handle synthesizing
6863 : this function by adding it to deferred_fns, but doing
6864 : it at the use site produces better error messages. */
6865 1230352 : ++function_depth;
6866 1230352 : synthesize_method (decl);
6867 1230352 : --function_depth;
6868 : /* If this is a synthesized method we don't need to
6869 : do the instantiation test below. */
6870 : }
6871 38461185 : else if (VAR_OR_FUNCTION_DECL_P (decl)
6872 49749903 : && DECL_TEMPLATE_INFO (decl)
6873 79891101 : && (!DECL_EXPLICIT_INSTANTIATION (decl)
6874 1218001 : || always_instantiate_p (decl)))
6875 : /* If this is a function or variable that is an instance of some
6876 : template, we now know that we will need to actually do the
6877 : instantiation. We check that DECL is not an explicit
6878 : instantiation because that is not checked in instantiate_decl.
6879 :
6880 : We put off instantiating functions in order to improve compile
6881 : times. Maintaining a stack of active functions is expensive,
6882 : and the inliner knows to instantiate any functions it might
6883 : need. Therefore, we always try to defer instantiation. */
6884 : {
6885 30080981 : ++function_depth;
6886 30080981 : instantiate_decl (decl, /*defer_ok=*/true,
6887 : /*expl_inst_class_mem_p=*/false);
6888 30072881 : --function_depth;
6889 : }
6890 :
6891 : return true;
6892 : }
6893 :
6894 : tree
6895 9 : vtv_start_verification_constructor_init_function (void)
6896 : {
6897 9 : return start_objects (/*initp=*/true, MAX_RESERVED_INIT_PRIORITY - 1, true);
6898 : }
6899 :
6900 : tree
6901 6 : vtv_finish_verification_constructor_init_function (tree body)
6902 : {
6903 6 : return finish_objects (/*initp=*/true, MAX_RESERVED_INIT_PRIORITY - 1, body);
6904 : }
6905 :
6906 : #include "gt-cp-decl2.h"
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