Line data Source code
1 : /* Maintain binary trees of symbols.
2 : Copyright (C) 2000-2026 Free Software Foundation, Inc.
3 : Contributed by Andy Vaught
4 :
5 : This file is part of GCC.
6 :
7 : GCC is free software; you can redistribute it and/or modify it under
8 : the terms of the GNU General Public License as published by the Free
9 : Software Foundation; either version 3, or (at your option) any later
10 : version.
11 :
12 : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 : WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 : 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 : #include "config.h"
23 : #include "system.h"
24 : #include "coretypes.h"
25 : #include "options.h"
26 : #include "gfortran.h"
27 : #include "diagnostic-core.h"
28 : #include "parse.h"
29 : #include "match.h"
30 : #include "constructor.h"
31 :
32 :
33 : /* Strings for all symbol attributes. We use these for dumping the
34 : parse tree, in error messages, and also when reading and writing
35 : modules. */
36 :
37 : const mstring flavors[] =
38 : {
39 : minit ("UNKNOWN-FL", FL_UNKNOWN), minit ("PROGRAM", FL_PROGRAM),
40 : minit ("BLOCK-DATA", FL_BLOCK_DATA), minit ("MODULE", FL_MODULE),
41 : minit ("VARIABLE", FL_VARIABLE), minit ("PARAMETER", FL_PARAMETER),
42 : minit ("LABEL", FL_LABEL), minit ("PROCEDURE", FL_PROCEDURE),
43 : minit ("DERIVED", FL_DERIVED), minit ("NAMELIST", FL_NAMELIST),
44 : minit ("UNION", FL_UNION), minit ("STRUCTURE", FL_STRUCT),
45 : minit (NULL, -1)
46 : };
47 :
48 : const mstring procedures[] =
49 : {
50 : minit ("UNKNOWN-PROC", PROC_UNKNOWN),
51 : minit ("MODULE-PROC", PROC_MODULE),
52 : minit ("INTERNAL-PROC", PROC_INTERNAL),
53 : minit ("DUMMY-PROC", PROC_DUMMY),
54 : minit ("INTRINSIC-PROC", PROC_INTRINSIC),
55 : minit ("EXTERNAL-PROC", PROC_EXTERNAL),
56 : minit ("STATEMENT-PROC", PROC_ST_FUNCTION),
57 : minit (NULL, -1)
58 : };
59 :
60 : const mstring intents[] =
61 : {
62 : minit ("UNKNOWN-INTENT", INTENT_UNKNOWN),
63 : minit ("IN", INTENT_IN),
64 : minit ("OUT", INTENT_OUT),
65 : minit ("INOUT", INTENT_INOUT),
66 : minit (NULL, -1)
67 : };
68 :
69 : const mstring access_types[] =
70 : {
71 : minit ("UNKNOWN-ACCESS", ACCESS_UNKNOWN),
72 : minit ("PUBLIC", ACCESS_PUBLIC),
73 : minit ("PRIVATE", ACCESS_PRIVATE),
74 : minit (NULL, -1)
75 : };
76 :
77 : const mstring ifsrc_types[] =
78 : {
79 : minit ("UNKNOWN", IFSRC_UNKNOWN),
80 : minit ("DECL", IFSRC_DECL),
81 : minit ("BODY", IFSRC_IFBODY)
82 : };
83 :
84 : const mstring save_status[] =
85 : {
86 : minit ("UNKNOWN", SAVE_NONE),
87 : minit ("EXPLICIT-SAVE", SAVE_EXPLICIT),
88 : minit ("IMPLICIT-SAVE", SAVE_IMPLICIT),
89 : };
90 :
91 : /* Set the mstrings for DTIO procedure names. */
92 : const mstring dtio_procs[] =
93 : {
94 : minit ("_dtio_formatted_read", DTIO_RF),
95 : minit ("_dtio_formatted_write", DTIO_WF),
96 : minit ("_dtio_unformatted_read", DTIO_RUF),
97 : minit ("_dtio_unformatted_write", DTIO_WUF),
98 : };
99 :
100 : /* This is to make sure the backend generates setup code in the correct
101 : order. */
102 : static int next_decl_order = 1;
103 :
104 : gfc_namespace *gfc_current_ns;
105 : gfc_namespace *gfc_global_ns_list;
106 :
107 : gfc_gsymbol *gfc_gsym_root = NULL;
108 :
109 : gfc_symbol *gfc_derived_types;
110 :
111 : static gfc_undo_change_set default_undo_chgset_var = { vNULL, vNULL, NULL };
112 : static gfc_undo_change_set *latest_undo_chgset = &default_undo_chgset_var;
113 :
114 :
115 : /*********** IMPLICIT NONE and IMPLICIT statement handlers ***********/
116 :
117 : /* The following static variable indicates whether a particular element has
118 : been explicitly set or not. */
119 :
120 : static int new_flag[GFC_LETTERS];
121 :
122 :
123 : /* Handle a correctly parsed IMPLICIT NONE. */
124 :
125 : void
126 23315 : gfc_set_implicit_none (bool type, bool external, locus *loc)
127 : {
128 23315 : int i;
129 :
130 23315 : if (external)
131 1061 : gfc_current_ns->has_implicit_none_export = 1;
132 :
133 23315 : if (type)
134 : {
135 23302 : gfc_current_ns->seen_implicit_none = 1;
136 629103 : for (i = 0; i < GFC_LETTERS; i++)
137 : {
138 605803 : if (gfc_current_ns->set_flag[i])
139 : {
140 2 : gfc_error_now ("IMPLICIT NONE (type) statement at %L following an "
141 : "IMPLICIT statement", loc);
142 2 : return;
143 : }
144 605801 : gfc_clear_ts (&gfc_current_ns->default_type[i]);
145 605801 : gfc_current_ns->set_flag[i] = 1;
146 : }
147 : }
148 : }
149 :
150 :
151 : /* Reset the implicit range flags. */
152 :
153 : void
154 23925 : gfc_clear_new_implicit (void)
155 : {
156 23925 : int i;
157 :
158 645975 : for (i = 0; i < GFC_LETTERS; i++)
159 622050 : new_flag[i] = 0;
160 23925 : }
161 :
162 :
163 : /* Prepare for a new implicit range. Sets flags in new_flag[]. */
164 :
165 : bool
166 654 : gfc_add_new_implicit_range (int c1, int c2)
167 : {
168 654 : int i;
169 :
170 654 : c1 -= 'a';
171 654 : c2 -= 'a';
172 :
173 5723 : for (i = c1; i <= c2; i++)
174 : {
175 5069 : if (new_flag[i])
176 : {
177 0 : gfc_error ("Letter %qc already set in IMPLICIT statement at %C",
178 : i + 'A');
179 0 : return false;
180 : }
181 :
182 5069 : new_flag[i] = 1;
183 : }
184 :
185 : return true;
186 : }
187 :
188 :
189 : /* Add a matched implicit range for gfc_set_implicit(). Check if merging
190 : the new implicit types back into the existing types will work. */
191 :
192 : bool
193 446 : gfc_merge_new_implicit (gfc_typespec *ts)
194 : {
195 446 : int i;
196 :
197 446 : if (gfc_current_ns->seen_implicit_none)
198 : {
199 0 : gfc_error ("Cannot specify IMPLICIT at %C after IMPLICIT NONE");
200 0 : return false;
201 : }
202 :
203 11996 : for (i = 0; i < GFC_LETTERS; i++)
204 : {
205 11552 : if (new_flag[i])
206 : {
207 5031 : if (gfc_current_ns->set_flag[i])
208 : {
209 2 : gfc_error ("Letter %qc already has an IMPLICIT type at %C",
210 : i + 'A');
211 2 : return false;
212 : }
213 :
214 5029 : gfc_current_ns->default_type[i] = *ts;
215 5029 : gfc_current_ns->implicit_loc[i] = gfc_current_locus;
216 5029 : gfc_current_ns->set_flag[i] = 1;
217 : }
218 : }
219 : return true;
220 : }
221 :
222 :
223 : /* Given a symbol, return a pointer to the typespec for its default type. */
224 :
225 : gfc_typespec *
226 2936697 : gfc_get_default_type (const char *name, gfc_namespace *ns)
227 : {
228 2936697 : char letter;
229 :
230 2936697 : letter = name[0];
231 :
232 2936697 : if (flag_allow_leading_underscore && letter == '_')
233 0 : gfc_fatal_error ("Option %<-fallow-leading-underscore%> is for use only by "
234 : "gfortran developers, and should not be used for "
235 : "implicitly typed variables");
236 :
237 2936697 : if (letter < 'a' || letter > 'z')
238 0 : gfc_internal_error ("gfc_get_default_type(): Bad symbol %qs", name);
239 :
240 2936697 : if (ns == NULL)
241 274684 : ns = gfc_current_ns;
242 :
243 2936697 : return &ns->default_type[letter - 'a'];
244 : }
245 :
246 :
247 : /* Recursively append candidate SYM to CANDIDATES. Store the number of
248 : candidates in CANDIDATES_LEN. */
249 :
250 : static void
251 529 : lookup_symbol_fuzzy_find_candidates (gfc_symtree *sym,
252 : char **&candidates,
253 : size_t &candidates_len)
254 : {
255 917 : gfc_symtree *p;
256 :
257 917 : if (sym == NULL)
258 : return;
259 :
260 917 : if (sym->n.sym->ts.type != BT_UNKNOWN && sym->n.sym->ts.type != BT_PROCEDURE)
261 500 : vec_push (candidates, candidates_len, sym->name);
262 917 : p = sym->left;
263 917 : if (p)
264 400 : lookup_symbol_fuzzy_find_candidates (p, candidates, candidates_len);
265 :
266 917 : p = sym->right;
267 917 : if (p)
268 : lookup_symbol_fuzzy_find_candidates (p, candidates, candidates_len);
269 : }
270 :
271 :
272 : /* Lookup symbol SYM_NAME fuzzily, taking names in SYMBOL into account. */
273 :
274 : static const char*
275 129 : lookup_symbol_fuzzy (const char *sym_name, gfc_symbol *symbol)
276 : {
277 129 : char **candidates = NULL;
278 129 : size_t candidates_len = 0;
279 129 : lookup_symbol_fuzzy_find_candidates (symbol->ns->sym_root, candidates,
280 : candidates_len);
281 129 : return gfc_closest_fuzzy_match (sym_name, candidates);
282 : }
283 :
284 :
285 : /* Given a pointer to a symbol, set its type according to the first
286 : letter of its name. Fails if the letter in question has no default
287 : type. */
288 :
289 : bool
290 114365 : gfc_set_default_type (gfc_symbol *sym, int error_flag, gfc_namespace *ns)
291 : {
292 114365 : gfc_typespec *ts;
293 114365 : gfc_expr *e;
294 :
295 : /* Check to see if a function selector of unknown type can be resolved. */
296 114365 : if (sym->assoc
297 18 : && (e = sym->assoc->target)
298 114383 : && e->expr_type == EXPR_FUNCTION)
299 : {
300 5 : if (e->ts.type == BT_UNKNOWN)
301 5 : gfc_resolve_expr (e);
302 5 : sym->ts = e->ts;
303 5 : if (sym->ts.type != BT_UNKNOWN)
304 : return true;
305 : }
306 :
307 114361 : if (sym->ts.type != BT_UNKNOWN)
308 0 : gfc_internal_error ("gfc_set_default_type(): symbol already has a type");
309 :
310 114361 : ts = gfc_get_default_type (sym->name, ns);
311 :
312 114361 : if (ts->type == BT_UNKNOWN)
313 : {
314 59437 : if (error_flag && !sym->attr.untyped && !gfc_query_suppress_errors ())
315 : {
316 129 : const char *guessed = lookup_symbol_fuzzy (sym->name, sym);
317 129 : if (guessed)
318 21 : gfc_error ("Symbol %qs at %L has no IMPLICIT type"
319 : "; did you mean %qs?",
320 : sym->name, &sym->declared_at, guessed);
321 : else
322 108 : gfc_error ("Symbol %qs at %L has no IMPLICIT type",
323 : sym->name, &sym->declared_at);
324 129 : sym->attr.untyped = 1; /* Ensure we only give an error once. */
325 : }
326 :
327 59437 : return false;
328 : }
329 :
330 54924 : sym->ts = *ts;
331 54924 : sym->attr.implicit_type = 1;
332 :
333 54924 : if (ts->type == BT_CHARACTER && ts->u.cl)
334 457 : sym->ts.u.cl = gfc_new_charlen (sym->ns, ts->u.cl);
335 54467 : else if (ts->type == BT_CLASS
336 54467 : && !gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as))
337 : return false;
338 :
339 54924 : if (sym->attr.is_bind_c == 1 && warn_c_binding_type)
340 : {
341 : /* BIND(C) variables should not be implicitly declared. */
342 1 : gfc_warning_now (OPT_Wc_binding_type, "Implicitly declared BIND(C) "
343 : "variable %qs at %L may not be C interoperable",
344 : sym->name, &sym->declared_at);
345 1 : sym->ts.f90_type = sym->ts.type;
346 : }
347 :
348 54924 : if (sym->attr.dummy != 0)
349 : {
350 4349 : if (sym->ns->proc_name != NULL
351 4348 : && (sym->ns->proc_name->attr.subroutine != 0
352 399 : || sym->ns->proc_name->attr.function != 0)
353 4348 : && sym->ns->proc_name->attr.is_bind_c != 0
354 56 : && warn_c_binding_type)
355 : {
356 : /* Dummy args to a BIND(C) routine may not be interoperable if
357 : they are implicitly typed. */
358 1 : gfc_warning_now (OPT_Wc_binding_type, "Implicitly declared variable "
359 : "%qs at %L may not be C interoperable but it is a "
360 : "dummy argument to the BIND(C) procedure %qs at %L",
361 : sym->name, &(sym->declared_at),
362 : sym->ns->proc_name->name,
363 : &(sym->ns->proc_name->declared_at));
364 1 : sym->ts.f90_type = sym->ts.type;
365 : }
366 : }
367 :
368 : return true;
369 : }
370 :
371 :
372 : /* This function is called from parse.cc(parse_progunit) to check the
373 : type of the function is not implicitly typed in the host namespace
374 : and to implicitly type the function result, if necessary. */
375 :
376 : void
377 12632 : gfc_check_function_type (gfc_namespace *ns)
378 : {
379 12632 : gfc_symbol *proc = ns->proc_name;
380 :
381 12632 : if (!proc->attr.contained || proc->result->attr.implicit_type)
382 : return;
383 :
384 9899 : if (proc->result->ts.type == BT_UNKNOWN && proc->result->ts.interface == NULL)
385 : {
386 102 : if (gfc_set_default_type (proc->result, 0, gfc_current_ns))
387 : {
388 82 : if (proc->result != proc)
389 : {
390 16 : proc->ts = proc->result->ts;
391 16 : proc->as = gfc_copy_array_spec (proc->result->as);
392 16 : proc->attr.dimension = proc->result->attr.dimension;
393 16 : proc->attr.pointer = proc->result->attr.pointer;
394 16 : proc->attr.allocatable = proc->result->attr.allocatable;
395 : }
396 : }
397 20 : else if (!proc->result->attr.proc_pointer)
398 : {
399 2 : gfc_error ("Function result %qs at %L has no IMPLICIT type",
400 : proc->result->name, &proc->result->declared_at);
401 2 : proc->result->attr.untyped = 1;
402 : }
403 : }
404 : }
405 :
406 :
407 : /******************** Symbol attribute stuff *********************/
408 :
409 : /* Older standards produced conflicts for some attributes that are allowed
410 : in newer standards. Check for the conflict and issue an error depending
411 : on the standard in play. */
412 :
413 : static bool
414 17118 : conflict_std (int standard, const char *a1, const char *a2, const char *name,
415 : locus *where)
416 : {
417 17118 : if (name == NULL)
418 : {
419 10238 : return gfc_notify_std (standard, "%s attribute conflicts "
420 : "with %s attribute at %L", a1, a2,
421 10238 : where);
422 : }
423 : else
424 : {
425 6880 : return gfc_notify_std (standard, "%s attribute conflicts "
426 : "with %s attribute in %qs at %L",
427 6880 : a1, a2, name, where);
428 : }
429 : }
430 :
431 : /* This is a generic conflict-checker. We do this to avoid having a
432 : single conflict in two places. */
433 :
434 : #define conf(a, b) if (attr->a && attr->b) { a1 = a; a2 = b; goto conflict; }
435 : #define conf2(a) if (attr->a) { a2 = a; goto conflict; }
436 : #define conf_std(a, b, std) if (attr->a && attr->b \
437 : && !conflict_std (std, a, b, name, where)) \
438 : return false;
439 :
440 : bool
441 6906569 : gfc_check_conflict (symbol_attribute *attr, const char *name, locus *where)
442 : {
443 6906569 : static const char *dummy = "DUMMY", *save = "SAVE", *pointer = "POINTER",
444 : *target = "TARGET", *external = "EXTERNAL", *intent = "INTENT",
445 : *intent_in = "INTENT(IN)", *intrinsic = "INTRINSIC",
446 : *intent_out = "INTENT(OUT)", *intent_inout = "INTENT(INOUT)",
447 : *allocatable = "ALLOCATABLE", *elemental = "ELEMENTAL",
448 : *privat = "PRIVATE", *recursive = "RECURSIVE",
449 : *in_common = "COMMON", *result = "RESULT", *in_namelist = "NAMELIST",
450 : *publik = "PUBLIC", *optional = "OPTIONAL", *entry = "ENTRY",
451 : *function = "FUNCTION", *subroutine = "SUBROUTINE",
452 : *dimension = "DIMENSION", *in_equivalence = "EQUIVALENCE",
453 : *use_assoc = "USE ASSOCIATED", *cray_pointer = "CRAY POINTER",
454 : *cray_pointee = "CRAY POINTEE", *data = "DATA", *value = "VALUE",
455 : *volatile_ = "VOLATILE", *is_protected = "PROTECTED",
456 : *is_bind_c = "BIND(C)", *procedure = "PROCEDURE",
457 : *proc_pointer = "PROCEDURE POINTER", *abstract = "ABSTRACT",
458 : *asynchronous = "ASYNCHRONOUS", *codimension = "CODIMENSION",
459 : *contiguous = "CONTIGUOUS", *generic = "GENERIC", *automatic = "AUTOMATIC",
460 : *pdt_len = "LEN", *pdt_kind = "KIND";
461 6906569 : static const char *threadprivate = "THREADPRIVATE";
462 6906569 : static const char *omp_groupprivate = "OpenMP GROUPPRIVATE";
463 6906569 : static const char *omp_declare_target = "OMP DECLARE TARGET";
464 6906569 : static const char *omp_declare_target_link = "OMP DECLARE TARGET LINK";
465 6906569 : static const char *omp_declare_target_local = "OMP DECLARE TARGET LOCAL";
466 6906569 : static const char *oacc_declare_copyin = "OACC DECLARE COPYIN";
467 6906569 : static const char *oacc_declare_create = "OACC DECLARE CREATE";
468 6906569 : static const char *oacc_declare_deviceptr = "OACC DECLARE DEVICEPTR";
469 6906569 : static const char *oacc_declare_device_resident =
470 : "OACC DECLARE DEVICE_RESIDENT";
471 :
472 6906569 : const char *a1, *a2;
473 :
474 6906569 : if (attr->artificial)
475 : return true;
476 :
477 6906543 : if (where == NULL)
478 4532159 : where = &gfc_current_locus;
479 :
480 6906543 : if (attr->pointer && attr->intent != INTENT_UNKNOWN)
481 4331 : conf_std (pointer, intent, GFC_STD_F2003);
482 :
483 6906542 : conf_std (in_namelist, allocatable, GFC_STD_F2003);
484 6906542 : conf_std (in_namelist, pointer, GFC_STD_F2003);
485 :
486 : /* Check for attributes not allowed in a BLOCK DATA. */
487 6906541 : if (gfc_current_state () == COMP_BLOCK_DATA)
488 : {
489 3743 : a1 = NULL;
490 :
491 3743 : if (attr->in_namelist)
492 1 : a1 = in_namelist;
493 3743 : if (attr->allocatable)
494 0 : a1 = allocatable;
495 3743 : if (attr->external)
496 0 : a1 = external;
497 3743 : if (attr->optional)
498 0 : a1 = optional;
499 3743 : if (attr->access == ACCESS_PRIVATE)
500 0 : a1 = privat;
501 3743 : if (attr->access == ACCESS_PUBLIC)
502 0 : a1 = publik;
503 3743 : if (attr->intent != INTENT_UNKNOWN)
504 0 : a1 = intent;
505 :
506 3743 : if (a1 != NULL)
507 : {
508 1 : gfc_error
509 1 : ("%s attribute not allowed in BLOCK DATA program unit at %L",
510 : a1, where);
511 1 : return false;
512 : }
513 : }
514 :
515 6906540 : if (attr->save == SAVE_EXPLICIT)
516 : {
517 6682 : conf (dummy, save);
518 6680 : conf (in_common, save);
519 6666 : conf (result, save);
520 6663 : conf (automatic, save);
521 :
522 6661 : switch (attr->flavor)
523 : {
524 2 : case FL_PROGRAM:
525 2 : case FL_BLOCK_DATA:
526 2 : case FL_MODULE:
527 2 : case FL_LABEL:
528 2 : case_fl_struct:
529 2 : case FL_PARAMETER:
530 2 : a1 = gfc_code2string (flavors, attr->flavor);
531 2 : a2 = save;
532 2 : goto conflict;
533 2 : case FL_NAMELIST:
534 2 : gfc_error ("Namelist group name at %L cannot have the "
535 : "SAVE attribute", where);
536 2 : return false;
537 : case FL_PROCEDURE:
538 : /* Conflicts between SAVE and PROCEDURE will be checked at
539 : resolution stage, see "resolve_fl_procedure". */
540 : case FL_VARIABLE:
541 : default:
542 : break;
543 : }
544 : }
545 :
546 : /* The copying of procedure dummy arguments for module procedures in
547 : a submodule occur whilst the current state is COMP_CONTAINS. It
548 : is necessary, therefore, to let this through. */
549 6906515 : if (name && attr->dummy
550 256405 : && (attr->function || attr->subroutine)
551 1657 : && gfc_current_state () == COMP_CONTAINS
552 15 : && !(gfc_new_block && gfc_new_block->abr_modproc_decl))
553 3 : gfc_error_now ("internal procedure %qs at %L conflicts with "
554 : "DUMMY argument", name, where);
555 :
556 6906515 : conf (dummy, entry);
557 6906513 : conf (dummy, intrinsic);
558 6906512 : conf (dummy, threadprivate);
559 6906512 : conf (dummy, omp_groupprivate);
560 6906512 : conf (dummy, omp_declare_target);
561 6906512 : conf (dummy, omp_declare_target_link);
562 6906512 : conf (dummy, omp_declare_target_local);
563 6906512 : conf (pointer, target);
564 6906512 : conf (pointer, intrinsic);
565 6906512 : conf (pointer, elemental);
566 6906510 : conf (pointer, codimension);
567 6906476 : conf (allocatable, elemental);
568 6906475 : conf (threadprivate, omp_groupprivate);
569 :
570 6906467 : conf (in_common, automatic);
571 6906461 : conf (result, automatic);
572 6906459 : conf (use_assoc, automatic);
573 6906459 : conf (dummy, automatic);
574 :
575 6906457 : conf (target, external);
576 6906457 : conf (target, intrinsic);
577 :
578 6906457 : if (!attr->if_source)
579 6804351 : conf (external, dimension); /* See Fortran 95's R504. */
580 :
581 6906457 : conf (external, intrinsic);
582 6906455 : conf (entry, intrinsic);
583 6906454 : conf (abstract, intrinsic);
584 :
585 6906451 : if ((attr->if_source == IFSRC_DECL && !attr->procedure) || attr->contained)
586 86141 : conf (external, subroutine);
587 :
588 6906449 : if (attr->proc_pointer && !gfc_notify_std (GFC_STD_F2003,
589 : "Procedure pointer at %C"))
590 : return false;
591 :
592 6906443 : conf (allocatable, pointer);
593 6906443 : conf_std (allocatable, dummy, GFC_STD_F2003);
594 6906443 : conf_std (allocatable, function, GFC_STD_F2003);
595 6906443 : conf_std (allocatable, result, GFC_STD_F2003);
596 6906443 : conf_std (elemental, recursive, GFC_STD_F2018);
597 :
598 6906443 : conf (in_common, dummy);
599 6906443 : conf (in_common, allocatable);
600 6906443 : conf (in_common, codimension);
601 6906443 : conf (in_common, result);
602 :
603 6906443 : conf (in_equivalence, use_assoc);
604 6906442 : conf (in_equivalence, codimension);
605 6906442 : conf (in_equivalence, dummy);
606 6906441 : conf (in_equivalence, target);
607 6906440 : conf (in_equivalence, pointer);
608 6906439 : conf (in_equivalence, function);
609 6906439 : conf (in_equivalence, result);
610 6906439 : conf (in_equivalence, entry);
611 6906439 : conf (in_equivalence, allocatable);
612 6906436 : conf (in_equivalence, threadprivate);
613 6906436 : conf (in_equivalence, omp_groupprivate);
614 6906436 : conf (in_equivalence, omp_declare_target);
615 6906436 : conf (in_equivalence, omp_declare_target_link);
616 6906436 : conf (in_equivalence, omp_declare_target_local);
617 6906436 : conf (in_equivalence, oacc_declare_create);
618 6906436 : conf (in_equivalence, oacc_declare_copyin);
619 6906436 : conf (in_equivalence, oacc_declare_deviceptr);
620 6906436 : conf (in_equivalence, oacc_declare_device_resident);
621 6906436 : conf (in_equivalence, is_bind_c);
622 :
623 6906435 : conf (dummy, result);
624 6906435 : conf (entry, result);
625 6906434 : conf (generic, result);
626 6906431 : conf (generic, omp_declare_target);
627 6906431 : conf (generic, omp_declare_target_local);
628 6906431 : conf (generic, omp_declare_target_link);
629 :
630 6906431 : conf (function, subroutine);
631 :
632 6906371 : if (!function && !subroutine)
633 0 : conf (is_bind_c, dummy);
634 :
635 6906371 : conf (is_bind_c, cray_pointer);
636 6906371 : conf (is_bind_c, cray_pointee);
637 6906371 : conf (is_bind_c, codimension);
638 6906370 : conf (is_bind_c, allocatable);
639 6906369 : conf (is_bind_c, elemental);
640 :
641 : /* Need to also get volatile attr, according to 5.1 of F2003 draft.
642 : Parameter conflict caught below. Also, value cannot be specified
643 : for a dummy procedure. */
644 :
645 : /* Cray pointer/pointee conflicts. */
646 6906367 : conf (cray_pointer, cray_pointee);
647 6906366 : conf (cray_pointer, dimension);
648 6906365 : conf (cray_pointer, codimension);
649 6906365 : conf (cray_pointer, contiguous);
650 6906365 : conf (cray_pointer, pointer);
651 6906364 : conf (cray_pointer, target);
652 6906363 : conf (cray_pointer, allocatable);
653 6906363 : conf (cray_pointer, external);
654 6906363 : conf (cray_pointer, intrinsic);
655 6906363 : conf (cray_pointer, in_namelist);
656 6906363 : conf (cray_pointer, function);
657 6906363 : conf (cray_pointer, subroutine);
658 6906363 : conf (cray_pointer, entry);
659 :
660 6906363 : conf (cray_pointee, allocatable);
661 6906363 : conf (cray_pointee, contiguous);
662 6906363 : conf (cray_pointee, codimension);
663 6906363 : conf (cray_pointee, intent);
664 6906363 : conf (cray_pointee, optional);
665 6906363 : conf (cray_pointee, dummy);
666 6906362 : conf (cray_pointee, target);
667 6906361 : conf (cray_pointee, intrinsic);
668 6906361 : conf (cray_pointee, pointer);
669 6906360 : conf (cray_pointee, entry);
670 6906360 : conf (cray_pointee, in_common);
671 6906357 : conf (cray_pointee, in_equivalence);
672 6906355 : conf (cray_pointee, threadprivate);
673 6906354 : conf (cray_pointee, omp_groupprivate);
674 6906354 : conf (cray_pointee, omp_declare_target);
675 6906354 : conf (cray_pointee, omp_declare_target_link);
676 6906354 : conf (cray_pointee, omp_declare_target_local);
677 6906354 : conf (cray_pointee, oacc_declare_create);
678 6906354 : conf (cray_pointee, oacc_declare_copyin);
679 6906354 : conf (cray_pointee, oacc_declare_deviceptr);
680 6906354 : conf (cray_pointee, oacc_declare_device_resident);
681 :
682 6906354 : conf (data, dummy);
683 6906351 : conf (data, function);
684 6906350 : conf (data, result);
685 6906349 : conf (data, allocatable);
686 :
687 6906348 : conf (value, pointer)
688 6906347 : conf (value, allocatable)
689 6906347 : conf (value, subroutine)
690 6906347 : conf (value, function)
691 6906346 : conf (value, volatile_)
692 6906346 : conf (value, dimension)
693 6906342 : conf (value, codimension)
694 6906342 : conf (value, external)
695 :
696 6906341 : conf (codimension, result)
697 :
698 6906338 : if (attr->value
699 41120 : && (attr->intent == INTENT_OUT || attr->intent == INTENT_INOUT))
700 : {
701 4 : a1 = value;
702 4 : a2 = attr->intent == INTENT_OUT ? intent_out : intent_inout;
703 4 : goto conflict;
704 : }
705 :
706 6906334 : conf (is_protected, intrinsic)
707 6906334 : conf (is_protected, in_common)
708 :
709 6906330 : conf (asynchronous, intrinsic)
710 6906330 : conf (asynchronous, external)
711 :
712 6906330 : conf (volatile_, intrinsic)
713 6906329 : conf (volatile_, external)
714 :
715 6906328 : if (attr->volatile_ && attr->intent == INTENT_IN)
716 : {
717 1 : a1 = volatile_;
718 1 : a2 = intent_in;
719 1 : goto conflict;
720 : }
721 :
722 6906327 : conf (procedure, allocatable)
723 6906326 : conf (procedure, dimension)
724 6906326 : conf (procedure, codimension)
725 6906326 : conf (procedure, intrinsic)
726 6906326 : conf (procedure, target)
727 6906326 : conf (procedure, value)
728 6906326 : conf (procedure, volatile_)
729 6906326 : conf (procedure, asynchronous)
730 6906326 : conf (procedure, entry)
731 :
732 6906325 : conf (proc_pointer, abstract)
733 6906323 : conf (proc_pointer, omp_declare_target)
734 6906323 : conf (proc_pointer, omp_declare_target_local)
735 6906323 : conf (proc_pointer, omp_declare_target_link)
736 :
737 6906323 : conf (entry, omp_declare_target)
738 6906323 : conf (entry, omp_declare_target_local)
739 6906323 : conf (entry, omp_declare_target_link)
740 6906323 : conf (entry, oacc_declare_create)
741 6906323 : conf (entry, oacc_declare_copyin)
742 6906323 : conf (entry, oacc_declare_deviceptr)
743 6906323 : conf (entry, oacc_declare_device_resident)
744 :
745 6906323 : conf (pdt_kind, allocatable)
746 6906322 : conf (pdt_kind, pointer)
747 6906321 : conf (pdt_kind, dimension)
748 6906320 : conf (pdt_kind, codimension)
749 :
750 6906320 : conf (pdt_len, allocatable)
751 6906319 : conf (pdt_len, pointer)
752 6906318 : conf (pdt_len, dimension)
753 6906317 : conf (pdt_len, codimension)
754 6906317 : conf (pdt_len, pdt_kind)
755 :
756 6906315 : if (attr->access == ACCESS_PRIVATE)
757 : {
758 2132 : a1 = privat;
759 2132 : conf2 (pdt_kind);
760 2131 : conf2 (pdt_len);
761 : }
762 :
763 6906313 : a1 = gfc_code2string (flavors, attr->flavor);
764 :
765 6906313 : if (attr->in_namelist
766 4453 : && attr->flavor != FL_VARIABLE
767 1969 : && attr->flavor != FL_PROCEDURE
768 1960 : && attr->flavor != FL_UNKNOWN)
769 : {
770 0 : a2 = in_namelist;
771 0 : goto conflict;
772 : }
773 :
774 6906313 : switch (attr->flavor)
775 : {
776 164867 : case FL_PROGRAM:
777 164867 : case FL_BLOCK_DATA:
778 164867 : case FL_MODULE:
779 164867 : case FL_LABEL:
780 164867 : conf2 (codimension);
781 164867 : conf2 (dimension);
782 164866 : conf2 (dummy);
783 164866 : conf2 (volatile_);
784 164864 : conf2 (asynchronous);
785 164863 : conf2 (contiguous);
786 164863 : conf2 (pointer);
787 164863 : conf2 (is_protected);
788 164862 : conf2 (target);
789 164862 : conf2 (external);
790 164861 : conf2 (intrinsic);
791 164861 : conf2 (allocatable);
792 164861 : conf2 (result);
793 164861 : conf2 (in_namelist);
794 164861 : conf2 (optional);
795 164861 : conf2 (function);
796 164861 : conf2 (subroutine);
797 164860 : conf2 (threadprivate);
798 164860 : conf2 (omp_groupprivate);
799 164860 : conf2 (omp_declare_target);
800 164860 : conf2 (omp_declare_target_link);
801 164860 : conf2 (omp_declare_target_local);
802 164860 : conf2 (oacc_declare_create);
803 164860 : conf2 (oacc_declare_copyin);
804 164860 : conf2 (oacc_declare_deviceptr);
805 164860 : conf2 (oacc_declare_device_resident);
806 :
807 164860 : if (attr->access == ACCESS_PUBLIC || attr->access == ACCESS_PRIVATE)
808 : {
809 2 : a2 = attr->access == ACCESS_PUBLIC ? publik : privat;
810 2 : gfc_error ("%s attribute applied to %s %s at %L", a2, a1,
811 : name, where);
812 2 : return false;
813 : }
814 :
815 164858 : if (attr->is_bind_c)
816 : {
817 2 : gfc_error_now ("BIND(C) applied to %s %s at %L", a1, name, where);
818 2 : return false;
819 : }
820 :
821 : break;
822 :
823 : case FL_VARIABLE:
824 : break;
825 :
826 789 : case FL_NAMELIST:
827 789 : conf2 (result);
828 : break;
829 :
830 4298601 : case FL_PROCEDURE:
831 : /* Conflicts with INTENT, SAVE and RESULT will be checked
832 : at resolution stage, see "resolve_fl_procedure". */
833 :
834 4298601 : if (attr->subroutine)
835 : {
836 111480 : a1 = subroutine;
837 111480 : conf2 (target);
838 111480 : conf2 (allocatable);
839 111480 : conf2 (volatile_);
840 111479 : conf2 (asynchronous);
841 111478 : conf2 (in_namelist);
842 111478 : conf2 (codimension);
843 111478 : conf2 (dimension);
844 111477 : conf2 (function);
845 111477 : if (!attr->proc_pointer)
846 : {
847 111294 : conf2 (threadprivate);
848 111294 : conf2 (omp_groupprivate);
849 : }
850 : }
851 :
852 : /* Procedure pointers in COMMON blocks are allowed in F03,
853 : * but forbidden per F08:C5100. */
854 4298598 : if (!attr->proc_pointer || (gfc_option.allow_std & GFC_STD_F2008))
855 4298428 : conf2 (in_common);
856 :
857 4298594 : conf2 (omp_declare_target_local);
858 4298592 : conf2 (omp_declare_target_link);
859 :
860 4298588 : switch (attr->proc)
861 : {
862 822008 : case PROC_ST_FUNCTION:
863 822008 : conf2 (dummy);
864 822007 : conf2 (target);
865 : break;
866 :
867 51845 : case PROC_MODULE:
868 51845 : conf2 (dummy);
869 : break;
870 :
871 0 : case PROC_DUMMY:
872 0 : conf2 (result);
873 0 : conf2 (threadprivate);
874 0 : conf2 (omp_groupprivate);
875 : break;
876 :
877 : default:
878 : break;
879 : }
880 :
881 : break;
882 :
883 36001 : case_fl_struct:
884 36001 : conf2 (dummy);
885 36001 : conf2 (pointer);
886 36001 : conf2 (target);
887 36001 : conf2 (external);
888 36001 : conf2 (intrinsic);
889 36001 : conf2 (allocatable);
890 36001 : conf2 (optional);
891 36001 : conf2 (entry);
892 36001 : conf2 (function);
893 36001 : conf2 (subroutine);
894 36001 : conf2 (threadprivate);
895 36001 : conf2 (omp_groupprivate);
896 36001 : conf2 (result);
897 36001 : conf2 (omp_declare_target);
898 36001 : conf2 (omp_declare_target_local);
899 36001 : conf2 (omp_declare_target_link);
900 36001 : conf2 (oacc_declare_create);
901 36001 : conf2 (oacc_declare_copyin);
902 36001 : conf2 (oacc_declare_deviceptr);
903 36001 : conf2 (oacc_declare_device_resident);
904 :
905 36001 : if (attr->intent != INTENT_UNKNOWN)
906 : {
907 0 : a2 = intent;
908 0 : goto conflict;
909 : }
910 : break;
911 :
912 38852 : case FL_PARAMETER:
913 38852 : conf2 (external);
914 38852 : conf2 (intrinsic);
915 38852 : conf2 (optional);
916 38852 : conf2 (allocatable);
917 38852 : conf2 (function);
918 38852 : conf2 (subroutine);
919 38852 : conf2 (entry);
920 38852 : conf2 (contiguous);
921 38852 : conf2 (pointer);
922 38852 : conf2 (is_protected);
923 38852 : conf2 (target);
924 38852 : conf2 (dummy);
925 38852 : conf2 (in_common);
926 38852 : conf2 (value);
927 38851 : conf2 (volatile_);
928 38850 : conf2 (asynchronous);
929 38850 : conf2 (threadprivate);
930 38850 : conf2 (omp_groupprivate);
931 38850 : conf2 (value);
932 38850 : conf2 (codimension);
933 38849 : conf2 (result);
934 38848 : if (!attr->is_iso_c)
935 38826 : conf2 (is_bind_c);
936 : break;
937 :
938 : default:
939 : break;
940 : }
941 :
942 : return true;
943 :
944 248 : conflict:
945 248 : if (name == NULL)
946 58 : gfc_error ("%s attribute conflicts with %s attribute at %L",
947 : a1, a2, where);
948 : else
949 190 : gfc_error ("%s attribute conflicts with %s attribute in %qs at %L",
950 : a1, a2, name, where);
951 :
952 : return false;
953 : }
954 :
955 : #undef conf
956 : #undef conf2
957 : #undef conf_std
958 :
959 :
960 : /* Mark a symbol as referenced. */
961 :
962 : void
963 8248658 : gfc_set_sym_referenced (gfc_symbol *sym)
964 : {
965 8248658 : if (sym->attr.referenced)
966 : return;
967 :
968 4129160 : sym->attr.referenced = 1;
969 :
970 : /* Remember the declaration order. */
971 4129160 : sym->decl_order = next_decl_order++;
972 : }
973 :
974 :
975 : /* Common subroutine called by attribute changing subroutines in order
976 : to prevent them from changing a symbol that has been
977 : use-associated. Returns zero if it is OK to change the symbol,
978 : nonzero if not. */
979 :
980 : static int
981 2305642 : check_used (symbol_attribute *attr, const char *name, locus *where)
982 : {
983 :
984 2305642 : if (attr->use_assoc == 0)
985 : return 0;
986 :
987 58 : if (where == NULL)
988 32 : where = &gfc_current_locus;
989 :
990 58 : if (name == NULL)
991 3 : gfc_error ("Cannot change attributes of USE-associated symbol at %L",
992 : where);
993 : else
994 55 : gfc_error ("Cannot change attributes of USE-associated symbol %s at %L",
995 : name, where);
996 :
997 : return 1;
998 : }
999 :
1000 :
1001 : /* Generate an error because of a duplicate attribute. */
1002 :
1003 : static void
1004 27 : duplicate_attr (const char *attr, locus *where)
1005 : {
1006 :
1007 0 : if (where == NULL)
1008 7 : where = &gfc_current_locus;
1009 :
1010 0 : gfc_error ("Duplicate %s attribute specified at %L", attr, where);
1011 0 : }
1012 :
1013 :
1014 : bool
1015 3006 : gfc_add_ext_attribute (symbol_attribute *attr, ext_attr_id_t ext_attr,
1016 : locus *where ATTRIBUTE_UNUSED)
1017 : {
1018 3006 : attr->ext_attr |= 1 << ext_attr;
1019 3006 : return true;
1020 : }
1021 :
1022 :
1023 : /* Called from decl.cc (attr_decl1) to check attributes, when declared
1024 : separately. */
1025 :
1026 : bool
1027 10208 : gfc_add_attribute (symbol_attribute *attr, locus *where)
1028 : {
1029 10208 : if (check_used (attr, NULL, where))
1030 : return false;
1031 :
1032 10208 : return gfc_check_conflict (attr, NULL, where);
1033 : }
1034 :
1035 :
1036 : bool
1037 36180 : gfc_add_allocatable (symbol_attribute *attr, locus *where)
1038 : {
1039 :
1040 36180 : if (check_used (attr, NULL, where))
1041 : return false;
1042 :
1043 36180 : if (attr->allocatable && ! gfc_submodule_procedure(attr))
1044 : {
1045 1 : duplicate_attr ("ALLOCATABLE", where);
1046 1 : return false;
1047 : }
1048 :
1049 575 : if (attr->flavor == FL_PROCEDURE && attr->if_source == IFSRC_IFBODY
1050 36268 : && !gfc_find_state (COMP_INTERFACE))
1051 : {
1052 1 : gfc_error ("ALLOCATABLE specified outside of INTERFACE body at %L",
1053 : where);
1054 1 : return false;
1055 : }
1056 :
1057 36178 : attr->allocatable = 1;
1058 36178 : return gfc_check_conflict (attr, NULL, where);
1059 : }
1060 :
1061 :
1062 : bool
1063 77 : gfc_add_automatic (symbol_attribute *attr, const char *name, locus *where)
1064 : {
1065 77 : if (check_used (attr, name, where))
1066 : return false;
1067 :
1068 77 : if (attr->automatic && !gfc_notify_std (GFC_STD_LEGACY,
1069 : "Duplicate AUTOMATIC attribute specified at %L", where))
1070 : return false;
1071 :
1072 77 : attr->automatic = 1;
1073 77 : return gfc_check_conflict (attr, name, where);
1074 : }
1075 :
1076 :
1077 : bool
1078 1601 : gfc_add_codimension (symbol_attribute *attr, const char *name, locus *where)
1079 : {
1080 :
1081 1601 : if (check_used (attr, name, where))
1082 : return false;
1083 :
1084 1601 : if (attr->codimension)
1085 : {
1086 2 : duplicate_attr ("CODIMENSION", where);
1087 2 : return false;
1088 : }
1089 :
1090 6 : if (attr->flavor == FL_PROCEDURE && attr->if_source == IFSRC_IFBODY
1091 1600 : && !gfc_find_state (COMP_INTERFACE))
1092 : {
1093 0 : gfc_error ("CODIMENSION specified for %qs outside its INTERFACE body "
1094 : "at %L", name, where);
1095 0 : return false;
1096 : }
1097 :
1098 1599 : attr->codimension = 1;
1099 1599 : return gfc_check_conflict (attr, name, where);
1100 : }
1101 :
1102 :
1103 : bool
1104 100607 : gfc_add_dimension (symbol_attribute *attr, const char *name, locus *where)
1105 : {
1106 :
1107 100607 : if (check_used (attr, name, where))
1108 : return false;
1109 :
1110 100607 : if (attr->dimension && ! gfc_submodule_procedure(attr))
1111 : {
1112 2 : duplicate_attr ("DIMENSION", where);
1113 2 : return false;
1114 : }
1115 :
1116 1247 : if (attr->flavor == FL_PROCEDURE && attr->if_source == IFSRC_IFBODY
1117 100844 : && !gfc_find_state (COMP_INTERFACE))
1118 : {
1119 1 : gfc_error ("DIMENSION specified for %qs outside its INTERFACE body "
1120 : "at %L", name, where);
1121 1 : return false;
1122 : }
1123 :
1124 100604 : attr->dimension = 1;
1125 100604 : return gfc_check_conflict (attr, name, where);
1126 : }
1127 :
1128 :
1129 : bool
1130 4328 : gfc_add_contiguous (symbol_attribute *attr, const char *name, locus *where)
1131 : {
1132 :
1133 4328 : if (check_used (attr, name, where))
1134 : return false;
1135 :
1136 4328 : if (attr->contiguous)
1137 : {
1138 2 : duplicate_attr ("CONTIGUOUS", where);
1139 2 : return false;
1140 : }
1141 :
1142 4326 : attr->contiguous = 1;
1143 4326 : return gfc_check_conflict (attr, name, where);
1144 : }
1145 :
1146 :
1147 : bool
1148 19751 : gfc_add_external (symbol_attribute *attr, locus *where)
1149 : {
1150 :
1151 19751 : if (check_used (attr, NULL, where))
1152 : return false;
1153 :
1154 19748 : if (attr->external)
1155 : {
1156 4 : duplicate_attr ("EXTERNAL", where);
1157 4 : return false;
1158 : }
1159 :
1160 19744 : if (attr->pointer && attr->if_source != IFSRC_IFBODY)
1161 : {
1162 800 : attr->pointer = 0;
1163 800 : attr->proc_pointer = 1;
1164 : }
1165 :
1166 19744 : attr->external = 1;
1167 :
1168 19744 : return gfc_check_conflict (attr, NULL, where);
1169 : }
1170 :
1171 :
1172 : bool
1173 1711 : gfc_add_intrinsic (symbol_attribute *attr, locus *where)
1174 : {
1175 :
1176 1711 : if (check_used (attr, NULL, where))
1177 : return false;
1178 :
1179 1711 : if (attr->intrinsic)
1180 : {
1181 0 : duplicate_attr ("INTRINSIC", where);
1182 0 : return false;
1183 : }
1184 :
1185 1711 : attr->intrinsic = 1;
1186 :
1187 1711 : return gfc_check_conflict (attr, NULL, where);
1188 : }
1189 :
1190 :
1191 : bool
1192 11751 : gfc_add_optional (symbol_attribute *attr, locus *where)
1193 : {
1194 :
1195 11751 : if (check_used (attr, NULL, where))
1196 : return false;
1197 :
1198 11751 : if (attr->optional)
1199 : {
1200 1 : duplicate_attr ("OPTIONAL", where);
1201 1 : return false;
1202 : }
1203 :
1204 11750 : attr->optional = 1;
1205 11750 : return gfc_check_conflict (attr, NULL, where);
1206 : }
1207 :
1208 : bool
1209 266 : gfc_add_kind (symbol_attribute *attr, locus *where)
1210 : {
1211 266 : if (attr->pdt_kind)
1212 : {
1213 0 : duplicate_attr ("KIND", where);
1214 0 : return false;
1215 : }
1216 :
1217 266 : attr->pdt_kind = 1;
1218 266 : return gfc_check_conflict (attr, NULL, where);
1219 : }
1220 :
1221 : bool
1222 293 : gfc_add_len (symbol_attribute *attr, locus *where)
1223 : {
1224 293 : if (attr->pdt_len)
1225 : {
1226 0 : duplicate_attr ("LEN", where);
1227 0 : return false;
1228 : }
1229 :
1230 293 : attr->pdt_len = 1;
1231 293 : return gfc_check_conflict (attr, NULL, where);
1232 : }
1233 :
1234 :
1235 : bool
1236 26366 : gfc_add_pointer (symbol_attribute *attr, locus *where)
1237 : {
1238 :
1239 26366 : if (check_used (attr, NULL, where))
1240 : return false;
1241 :
1242 3 : if (attr->pointer && !(attr->if_source == IFSRC_IFBODY
1243 1 : && !gfc_find_state (COMP_INTERFACE))
1244 26367 : && ! gfc_submodule_procedure(attr))
1245 : {
1246 1 : duplicate_attr ("POINTER", where);
1247 1 : return false;
1248 : }
1249 :
1250 26357 : if (attr->procedure || (attr->external && attr->if_source != IFSRC_IFBODY)
1251 52701 : || (attr->if_source == IFSRC_IFBODY
1252 489 : && !gfc_find_state (COMP_INTERFACE)))
1253 36 : attr->proc_pointer = 1;
1254 : else
1255 26329 : attr->pointer = 1;
1256 :
1257 26365 : return gfc_check_conflict (attr, NULL, where);
1258 : }
1259 :
1260 :
1261 : bool
1262 690 : gfc_add_cray_pointer (symbol_attribute *attr, locus *where)
1263 : {
1264 :
1265 690 : if (check_used (attr, NULL, where))
1266 : return false;
1267 :
1268 690 : attr->cray_pointer = 1;
1269 690 : return gfc_check_conflict (attr, NULL, where);
1270 : }
1271 :
1272 :
1273 : bool
1274 674 : gfc_add_cray_pointee (symbol_attribute *attr, locus *where)
1275 : {
1276 :
1277 674 : if (check_used (attr, NULL, where))
1278 : return false;
1279 :
1280 674 : if (attr->cray_pointee)
1281 : {
1282 1 : gfc_error ("Cray Pointee at %L appears in multiple pointer()"
1283 : " statements", where);
1284 1 : return false;
1285 : }
1286 :
1287 673 : attr->cray_pointee = 1;
1288 673 : return gfc_check_conflict (attr, NULL, where);
1289 : }
1290 :
1291 :
1292 : bool
1293 114 : gfc_add_protected (symbol_attribute *attr, const char *name, locus *where)
1294 : {
1295 114 : if (check_used (attr, name, where))
1296 : return false;
1297 :
1298 114 : if (attr->is_protected)
1299 : {
1300 0 : if (!gfc_notify_std (GFC_STD_LEGACY,
1301 : "Duplicate PROTECTED attribute specified at %L",
1302 : where))
1303 : return false;
1304 : }
1305 :
1306 114 : attr->is_protected = 1;
1307 114 : return gfc_check_conflict (attr, name, where);
1308 : }
1309 :
1310 :
1311 : bool
1312 8534 : gfc_add_result (symbol_attribute *attr, const char *name, locus *where)
1313 : {
1314 :
1315 8534 : if (check_used (attr, name, where))
1316 : return false;
1317 :
1318 8534 : attr->result = 1;
1319 8534 : return gfc_check_conflict (attr, name, where);
1320 : }
1321 :
1322 :
1323 : bool
1324 10368 : gfc_add_save (symbol_attribute *attr, save_state s, const char *name,
1325 : locus *where)
1326 : {
1327 :
1328 10368 : if (check_used (attr, name, where))
1329 : return false;
1330 :
1331 10368 : if (s == SAVE_EXPLICIT && gfc_pure (NULL))
1332 : {
1333 2 : gfc_error ("SAVE attribute at %L cannot be specified in a PURE "
1334 : "procedure", where);
1335 2 : return false;
1336 : }
1337 :
1338 10366 : if (s == SAVE_EXPLICIT)
1339 3796 : gfc_unset_implicit_pure (NULL);
1340 :
1341 3796 : if (s == SAVE_EXPLICIT && attr->save == SAVE_EXPLICIT
1342 56 : && (flag_automatic || pedantic))
1343 : {
1344 21 : if (!where)
1345 : {
1346 1 : gfc_error ("Duplicate SAVE attribute specified near %C");
1347 1 : return false;
1348 : }
1349 :
1350 20 : if (!gfc_notify_std (GFC_STD_LEGACY, "Duplicate SAVE attribute "
1351 : "specified at %L", where))
1352 : return false;
1353 : }
1354 :
1355 10363 : attr->save = s;
1356 10363 : return gfc_check_conflict (attr, name, where);
1357 : }
1358 :
1359 :
1360 : bool
1361 23212 : gfc_add_value (symbol_attribute *attr, const char *name, locus *where)
1362 : {
1363 :
1364 23212 : if (check_used (attr, name, where))
1365 : return false;
1366 :
1367 23212 : if (attr->value)
1368 : {
1369 0 : if (!gfc_notify_std (GFC_STD_LEGACY,
1370 : "Duplicate VALUE attribute specified at %L",
1371 : where))
1372 : return false;
1373 : }
1374 :
1375 23212 : attr->value = 1;
1376 23212 : return gfc_check_conflict (attr, name, where);
1377 : }
1378 :
1379 :
1380 : bool
1381 1233 : gfc_add_volatile (symbol_attribute *attr, const char *name, locus *where)
1382 : {
1383 : /* No check_used needed as 11.2.1 of the F2003 standard allows
1384 : that the local identifier made accessible by a use statement can be
1385 : given a VOLATILE attribute - unless it is a coarray (F2008, C560). */
1386 :
1387 1233 : if (attr->volatile_ && attr->volatile_ns == gfc_current_ns)
1388 1 : if (!gfc_notify_std (GFC_STD_LEGACY,
1389 : "Duplicate VOLATILE attribute specified at %L",
1390 : where))
1391 : return false;
1392 :
1393 : /* F2008: C1282 A designator of a variable with the VOLATILE attribute
1394 : shall not appear in a pure subprogram.
1395 :
1396 : F2018: C1588 A local variable of a pure subprogram, or of a BLOCK
1397 : construct within a pure subprogram, shall not have the SAVE or
1398 : VOLATILE attribute. */
1399 1233 : if (gfc_pure (NULL))
1400 : {
1401 2 : gfc_error ("VOLATILE attribute at %L cannot be specified in a "
1402 : "PURE procedure", where);
1403 2 : return false;
1404 : }
1405 :
1406 :
1407 1231 : attr->volatile_ = 1;
1408 1231 : attr->volatile_ns = gfc_current_ns;
1409 1231 : return gfc_check_conflict (attr, name, where);
1410 : }
1411 :
1412 :
1413 : bool
1414 59 : gfc_add_asynchronous (symbol_attribute *attr, const char *name, locus *where)
1415 : {
1416 : /* No check_used needed as 11.2.1 of the F2003 standard allows
1417 : that the local identifier made accessible by a use statement can be
1418 : given a ASYNCHRONOUS attribute. */
1419 :
1420 59 : if (attr->asynchronous && attr->asynchronous_ns == gfc_current_ns)
1421 0 : if (!gfc_notify_std (GFC_STD_LEGACY,
1422 : "Duplicate ASYNCHRONOUS attribute specified at %L",
1423 : where))
1424 : return false;
1425 :
1426 59 : attr->asynchronous = 1;
1427 59 : attr->asynchronous_ns = gfc_current_ns;
1428 59 : return gfc_check_conflict (attr, name, where);
1429 : }
1430 :
1431 :
1432 : bool
1433 60 : gfc_add_omp_groupprivate (symbol_attribute *attr, const char *name,
1434 : locus *where)
1435 : {
1436 :
1437 60 : if (check_used (attr, name, where))
1438 : return false;
1439 :
1440 60 : if (attr->omp_groupprivate)
1441 : {
1442 6 : duplicate_attr ("OpenMP GROUPPRIVATE", where);
1443 6 : return false;
1444 : }
1445 :
1446 54 : attr->omp_groupprivate = true;
1447 54 : return gfc_check_conflict (attr, name, where);
1448 : }
1449 :
1450 :
1451 : bool
1452 290 : gfc_add_threadprivate (symbol_attribute *attr, const char *name, locus *where)
1453 : {
1454 :
1455 290 : if (check_used (attr, name, where))
1456 : return false;
1457 :
1458 290 : if (attr->threadprivate)
1459 : {
1460 0 : duplicate_attr ("THREADPRIVATE", where);
1461 0 : return false;
1462 : }
1463 :
1464 290 : attr->threadprivate = 1;
1465 290 : return gfc_check_conflict (attr, name, where);
1466 : }
1467 :
1468 :
1469 : bool
1470 1117 : gfc_add_omp_declare_target (symbol_attribute *attr, const char *name,
1471 : locus *where)
1472 : {
1473 :
1474 1117 : if (check_used (attr, name, where))
1475 : return false;
1476 :
1477 1094 : if (attr->omp_declare_target)
1478 : return true;
1479 :
1480 1043 : attr->omp_declare_target = 1;
1481 1043 : return gfc_check_conflict (attr, name, where);
1482 : }
1483 :
1484 :
1485 : bool
1486 61 : gfc_add_omp_declare_target_link (symbol_attribute *attr, const char *name,
1487 : locus *where)
1488 : {
1489 :
1490 61 : if (check_used (attr, name, where))
1491 : return false;
1492 :
1493 59 : if (attr->omp_declare_target_link)
1494 : return true;
1495 :
1496 42 : attr->omp_declare_target_link = 1;
1497 42 : return gfc_check_conflict (attr, name, where);
1498 : }
1499 :
1500 :
1501 : bool
1502 61 : gfc_add_omp_declare_target_local (symbol_attribute *attr, const char *name,
1503 : locus *where)
1504 : {
1505 :
1506 61 : if (check_used (attr, name, where))
1507 : return false;
1508 :
1509 61 : if (attr->omp_declare_target_local)
1510 : return true;
1511 :
1512 51 : attr->omp_declare_target_local = 1;
1513 51 : return gfc_check_conflict (attr, name, where);
1514 : }
1515 :
1516 :
1517 : bool
1518 0 : gfc_add_oacc_declare_create (symbol_attribute *attr, const char *name,
1519 : locus *where)
1520 : {
1521 0 : if (check_used (attr, name, where))
1522 : return false;
1523 :
1524 0 : if (attr->oacc_declare_create)
1525 : return true;
1526 :
1527 0 : attr->oacc_declare_create = 1;
1528 0 : return gfc_check_conflict (attr, name, where);
1529 : }
1530 :
1531 :
1532 : bool
1533 0 : gfc_add_oacc_declare_copyin (symbol_attribute *attr, const char *name,
1534 : locus *where)
1535 : {
1536 0 : if (check_used (attr, name, where))
1537 : return false;
1538 :
1539 0 : if (attr->oacc_declare_copyin)
1540 : return true;
1541 :
1542 0 : attr->oacc_declare_copyin = 1;
1543 0 : return gfc_check_conflict (attr, name, where);
1544 : }
1545 :
1546 :
1547 : bool
1548 0 : gfc_add_oacc_declare_deviceptr (symbol_attribute *attr, const char *name,
1549 : locus *where)
1550 : {
1551 0 : if (check_used (attr, name, where))
1552 : return false;
1553 :
1554 0 : if (attr->oacc_declare_deviceptr)
1555 : return true;
1556 :
1557 0 : attr->oacc_declare_deviceptr = 1;
1558 0 : return gfc_check_conflict (attr, name, where);
1559 : }
1560 :
1561 :
1562 : bool
1563 0 : gfc_add_oacc_declare_device_resident (symbol_attribute *attr, const char *name,
1564 : locus *where)
1565 : {
1566 0 : if (check_used (attr, name, where))
1567 : return false;
1568 :
1569 0 : if (attr->oacc_declare_device_resident)
1570 : return true;
1571 :
1572 0 : attr->oacc_declare_device_resident = 1;
1573 0 : return gfc_check_conflict (attr, name, where);
1574 : }
1575 :
1576 :
1577 : bool
1578 12056 : gfc_add_target (symbol_attribute *attr, locus *where)
1579 : {
1580 :
1581 12056 : if (check_used (attr, NULL, where))
1582 : return false;
1583 :
1584 12056 : if (attr->target)
1585 : {
1586 1 : duplicate_attr ("TARGET", where);
1587 1 : return false;
1588 : }
1589 :
1590 12055 : attr->target = 1;
1591 12055 : return gfc_check_conflict (attr, NULL, where);
1592 : }
1593 :
1594 :
1595 : bool
1596 99174 : gfc_add_dummy (symbol_attribute *attr, const char *name, locus *where)
1597 : {
1598 :
1599 99174 : if (check_used (attr, name, where))
1600 : return false;
1601 :
1602 : /* Duplicate dummy arguments are allowed due to ENTRY statements. */
1603 99174 : attr->dummy = 1;
1604 99174 : return gfc_check_conflict (attr, name, where);
1605 : }
1606 :
1607 :
1608 : bool
1609 11639 : gfc_add_in_common (symbol_attribute *attr, const char *name, locus *where)
1610 : {
1611 :
1612 11639 : if (check_used (attr, name, where))
1613 : return false;
1614 :
1615 : /* Duplicate attribute already checked for. */
1616 11639 : attr->in_common = 1;
1617 11639 : return gfc_check_conflict (attr, name, where);
1618 : }
1619 :
1620 :
1621 : bool
1622 2949 : gfc_add_in_equivalence (symbol_attribute *attr, const char *name, locus *where)
1623 : {
1624 :
1625 : /* Duplicate attribute already checked for. */
1626 2949 : attr->in_equivalence = 1;
1627 2949 : if (!gfc_check_conflict (attr, name, where))
1628 : return false;
1629 :
1630 2940 : if (attr->flavor == FL_VARIABLE)
1631 : return true;
1632 :
1633 109 : return gfc_add_flavor (attr, FL_VARIABLE, name, where);
1634 : }
1635 :
1636 :
1637 : bool
1638 2950 : gfc_add_data (symbol_attribute *attr, const char *name, locus *where)
1639 : {
1640 :
1641 2950 : if (check_used (attr, name, where))
1642 : return false;
1643 :
1644 2949 : attr->data = 1;
1645 2949 : return gfc_check_conflict (attr, name, where);
1646 : }
1647 :
1648 :
1649 : bool
1650 2048 : gfc_add_in_namelist (symbol_attribute *attr, const char *name, locus *where)
1651 : {
1652 :
1653 2048 : attr->in_namelist = 1;
1654 2048 : return gfc_check_conflict (attr, name, where);
1655 : }
1656 :
1657 :
1658 : bool
1659 953 : gfc_add_sequence (symbol_attribute *attr, const char *name, locus *where)
1660 : {
1661 :
1662 953 : if (check_used (attr, name, where))
1663 : return false;
1664 :
1665 953 : attr->sequence = 1;
1666 953 : return gfc_check_conflict (attr, name, where);
1667 : }
1668 :
1669 :
1670 : bool
1671 8420 : gfc_add_elemental (symbol_attribute *attr, locus *where)
1672 : {
1673 :
1674 8420 : if (check_used (attr, NULL, where))
1675 : return false;
1676 :
1677 8420 : if (attr->elemental)
1678 : {
1679 2 : duplicate_attr ("ELEMENTAL", where);
1680 2 : return false;
1681 : }
1682 :
1683 8418 : attr->elemental = 1;
1684 8418 : return gfc_check_conflict (attr, NULL, where);
1685 : }
1686 :
1687 :
1688 : bool
1689 11270 : gfc_add_pure (symbol_attribute *attr, locus *where)
1690 : {
1691 :
1692 11270 : if (check_used (attr, NULL, where))
1693 : return false;
1694 :
1695 11270 : if (attr->pure)
1696 : {
1697 2 : duplicate_attr ("PURE", where);
1698 2 : return false;
1699 : }
1700 :
1701 11268 : attr->pure = 1;
1702 11268 : return gfc_check_conflict (attr, NULL, where);
1703 : }
1704 :
1705 :
1706 : bool
1707 757 : gfc_add_recursive (symbol_attribute *attr, locus *where)
1708 : {
1709 :
1710 757 : if (check_used (attr, NULL, where))
1711 : return false;
1712 :
1713 757 : if (attr->recursive)
1714 : {
1715 2 : duplicate_attr ("RECURSIVE", where);
1716 2 : return false;
1717 : }
1718 :
1719 755 : attr->recursive = 1;
1720 755 : return gfc_check_conflict (attr, NULL, where);
1721 : }
1722 :
1723 :
1724 : bool
1725 759 : gfc_add_entry (symbol_attribute *attr, const char *name, locus *where)
1726 : {
1727 :
1728 759 : if (check_used (attr, name, where))
1729 : return false;
1730 :
1731 759 : if (attr->entry)
1732 : {
1733 0 : duplicate_attr ("ENTRY", where);
1734 0 : return false;
1735 : }
1736 :
1737 759 : attr->entry = 1;
1738 759 : return gfc_check_conflict (attr, name, where);
1739 : }
1740 :
1741 :
1742 : bool
1743 1018206 : gfc_add_function (symbol_attribute *attr, const char *name, locus *where)
1744 : {
1745 :
1746 1018206 : if (attr->flavor != FL_PROCEDURE
1747 1018206 : && !gfc_add_flavor (attr, FL_PROCEDURE, name, where))
1748 : return false;
1749 :
1750 1018206 : attr->function = 1;
1751 1018206 : return gfc_check_conflict (attr, name, where);
1752 : }
1753 :
1754 :
1755 : bool
1756 84097 : gfc_add_subroutine (symbol_attribute *attr, const char *name, locus *where)
1757 : {
1758 :
1759 84097 : if (attr->flavor != FL_PROCEDURE
1760 84097 : && !gfc_add_flavor (attr, FL_PROCEDURE, name, where))
1761 : return false;
1762 :
1763 84094 : attr->subroutine = 1;
1764 :
1765 : /* If we are looking at a BLOCK DATA statement and we encounter a
1766 : name with a leading underscore (which must be
1767 : compiler-generated), do not check. See PR 84394. */
1768 :
1769 84094 : if (name && *name != '_' && gfc_current_state () != COMP_BLOCK_DATA)
1770 82285 : return gfc_check_conflict (attr, name, where);
1771 : else
1772 : return true;
1773 : }
1774 :
1775 :
1776 : bool
1777 25687 : gfc_add_generic (symbol_attribute *attr, const char *name, locus *where)
1778 : {
1779 :
1780 25687 : if (attr->flavor != FL_PROCEDURE
1781 25687 : && !gfc_add_flavor (attr, FL_PROCEDURE, name, where))
1782 : return false;
1783 :
1784 25685 : attr->generic = 1;
1785 25685 : return gfc_check_conflict (attr, name, where);
1786 : }
1787 :
1788 :
1789 : bool
1790 1612 : gfc_add_proc (symbol_attribute *attr, const char *name, locus *where)
1791 : {
1792 :
1793 1612 : if (check_used (attr, NULL, where))
1794 : return false;
1795 :
1796 1612 : if (attr->flavor != FL_PROCEDURE
1797 1612 : && !gfc_add_flavor (attr, FL_PROCEDURE, name, where))
1798 : return false;
1799 :
1800 1612 : if (attr->procedure)
1801 : {
1802 0 : duplicate_attr ("PROCEDURE", where);
1803 0 : return false;
1804 : }
1805 :
1806 1612 : attr->procedure = 1;
1807 :
1808 1612 : return gfc_check_conflict (attr, NULL, where);
1809 : }
1810 :
1811 :
1812 : bool
1813 801 : gfc_add_abstract (symbol_attribute* attr, locus* where)
1814 : {
1815 801 : if (attr->abstract)
1816 : {
1817 1 : duplicate_attr ("ABSTRACT", where);
1818 1 : return false;
1819 : }
1820 :
1821 800 : attr->abstract = 1;
1822 :
1823 800 : return gfc_check_conflict (attr, NULL, where);
1824 : }
1825 :
1826 :
1827 : /* Flavors are special because some flavors are not what Fortran
1828 : considers attributes and can be reaffirmed multiple times. */
1829 :
1830 : bool
1831 3820983 : gfc_add_flavor (symbol_attribute *attr, sym_flavor f, const char *name,
1832 : locus *where)
1833 : {
1834 :
1835 3820983 : if ((f == FL_PROGRAM || f == FL_BLOCK_DATA || f == FL_MODULE
1836 3820983 : || f == FL_PARAMETER || f == FL_LABEL || gfc_fl_struct(f)
1837 238075 : || f == FL_NAMELIST) && check_used (attr, name, where))
1838 : return false;
1839 :
1840 3820983 : if (attr->flavor == f && f == FL_VARIABLE)
1841 : return true;
1842 :
1843 : /* Copying a procedure dummy argument for a module procedure in a
1844 : submodule results in the flavor being copied and would result in
1845 : an error without this. */
1846 3820981 : if (attr->flavor == f && f == FL_PROCEDURE
1847 560 : && gfc_new_block && gfc_new_block->abr_modproc_decl)
1848 : return true;
1849 :
1850 3820969 : if (attr->flavor != FL_UNKNOWN)
1851 : {
1852 612 : if (where == NULL)
1853 500 : where = &gfc_current_locus;
1854 :
1855 612 : if (name)
1856 352 : gfc_error ("%s attribute of %qs conflicts with %s attribute at %L",
1857 176 : gfc_code2string (flavors, attr->flavor), name,
1858 : gfc_code2string (flavors, f), where);
1859 : else
1860 872 : gfc_error ("%s attribute conflicts with %s attribute at %L",
1861 436 : gfc_code2string (flavors, attr->flavor),
1862 : gfc_code2string (flavors, f), where);
1863 :
1864 612 : return false;
1865 : }
1866 :
1867 3820357 : attr->flavor = f;
1868 :
1869 3820357 : return gfc_check_conflict (attr, name, where);
1870 : }
1871 :
1872 :
1873 : bool
1874 1451786 : gfc_add_procedure (symbol_attribute *attr, procedure_type t,
1875 : const char *name, locus *where)
1876 : {
1877 :
1878 1451786 : if (check_used (attr, name, where))
1879 : return false;
1880 :
1881 1451757 : if (attr->flavor != FL_PROCEDURE
1882 1451757 : && !gfc_add_flavor (attr, FL_PROCEDURE, name, where))
1883 : return false;
1884 :
1885 1451707 : if (where == NULL)
1886 1432436 : where = &gfc_current_locus;
1887 :
1888 1451707 : if (attr->proc != PROC_UNKNOWN && !attr->module_procedure
1889 283 : && attr->access == ACCESS_UNKNOWN)
1890 : {
1891 281 : gfc_error ("%s procedure at %L is already declared as %s procedure",
1892 : gfc_code2string (procedures, t), where,
1893 281 : gfc_code2string (procedures, attr->proc));
1894 1 : if (attr->proc == PROC_ST_FUNCTION && t == PROC_INTERNAL
1895 282 : && !gfc_notification_std (GFC_STD_F2008))
1896 : {
1897 1 : inform (gfc_get_location (where),
1898 : "F2008: A pointer function assignment is ambiguous if it is "
1899 : "the first executable statement after the specification "
1900 : "block. Please add any other kind of executable "
1901 : "statement before it");
1902 : }
1903 :
1904 281 : return false;
1905 : }
1906 :
1907 1451426 : attr->proc = t;
1908 :
1909 : /* Statement functions are always scalar and functions. */
1910 1451426 : if (t == PROC_ST_FUNCTION
1911 1451426 : && ((!attr->function && !gfc_add_function (attr, name, where))
1912 411021 : || attr->dimension))
1913 68 : return false;
1914 :
1915 1451358 : return gfc_check_conflict (attr, name, where);
1916 : }
1917 :
1918 :
1919 : bool
1920 57843 : gfc_add_intent (symbol_attribute *attr, sym_intent intent, locus *where)
1921 : {
1922 :
1923 57843 : if (check_used (attr, NULL, where))
1924 : return false;
1925 :
1926 57843 : if (attr->intent == INTENT_UNKNOWN)
1927 : {
1928 57843 : attr->intent = intent;
1929 57843 : return gfc_check_conflict (attr, NULL, where);
1930 : }
1931 :
1932 0 : if (where == NULL)
1933 0 : where = &gfc_current_locus;
1934 :
1935 0 : gfc_error ("INTENT (%s) conflicts with INTENT(%s) at %L",
1936 0 : gfc_intent_string (attr->intent),
1937 : gfc_intent_string (intent), where);
1938 :
1939 0 : return false;
1940 : }
1941 :
1942 :
1943 : /* No checks for use-association in public and private statements. */
1944 :
1945 : bool
1946 5723 : gfc_add_access (symbol_attribute *attr, gfc_access access,
1947 : const char *name, locus *where)
1948 : {
1949 :
1950 5723 : if (attr->access == ACCESS_UNKNOWN
1951 5 : || (attr->use_assoc && attr->access != ACCESS_PRIVATE))
1952 : {
1953 5719 : attr->access = access;
1954 5719 : return gfc_check_conflict (attr, name, where);
1955 : }
1956 :
1957 4 : if (where == NULL)
1958 3 : where = &gfc_current_locus;
1959 4 : gfc_error ("ACCESS specification at %L was already specified", where);
1960 :
1961 4 : return false;
1962 : }
1963 :
1964 :
1965 : /* Set the is_bind_c field for the given symbol_attribute. */
1966 :
1967 : bool
1968 7353 : gfc_add_is_bind_c (symbol_attribute *attr, const char *name, locus *where,
1969 : int is_proc_lang_bind_spec)
1970 : {
1971 :
1972 7353 : if (is_proc_lang_bind_spec == 0 && attr->flavor == FL_PROCEDURE)
1973 5 : gfc_error_now ("BIND(C) attribute at %L can only be used for "
1974 : "variables or common blocks", where);
1975 7348 : else if (attr->is_bind_c)
1976 1 : gfc_error_now ("Duplicate BIND attribute specified at %L", where);
1977 : else
1978 7347 : attr->is_bind_c = 1;
1979 :
1980 7353 : if (where == NULL)
1981 54 : where = &gfc_current_locus;
1982 :
1983 7353 : if (!gfc_notify_std (GFC_STD_F2003, "BIND(C) at %L", where))
1984 : return false;
1985 :
1986 7353 : return gfc_check_conflict (attr, name, where);
1987 : }
1988 :
1989 :
1990 : /* Set the extension field for the given symbol_attribute. */
1991 :
1992 : bool
1993 1468 : gfc_add_extension (symbol_attribute *attr, locus *where)
1994 : {
1995 1468 : if (where == NULL)
1996 0 : where = &gfc_current_locus;
1997 :
1998 1468 : if (attr->extension)
1999 0 : gfc_error_now ("Duplicate EXTENDS attribute specified at %L", where);
2000 : else
2001 1468 : attr->extension = 1;
2002 :
2003 1468 : if (!gfc_notify_std (GFC_STD_F2003, "EXTENDS at %L", where))
2004 : return false;
2005 :
2006 : return true;
2007 : }
2008 :
2009 :
2010 : bool
2011 150587 : gfc_add_explicit_interface (gfc_symbol *sym, ifsrc source,
2012 : gfc_formal_arglist * formal, locus *where)
2013 : {
2014 150587 : if (check_used (&sym->attr, sym->name, where))
2015 : return false;
2016 :
2017 : /* Skip the following checks in the case of a module_procedures in a
2018 : submodule since they will manifestly fail. */
2019 150587 : if (sym->attr.module_procedure == 1
2020 1379 : && source == IFSRC_DECL)
2021 912 : goto finish;
2022 :
2023 149675 : if (where == NULL)
2024 149675 : where = &gfc_current_locus;
2025 :
2026 149675 : if (sym->attr.if_source != IFSRC_UNKNOWN
2027 149675 : && sym->attr.if_source != IFSRC_DECL)
2028 : {
2029 0 : gfc_error ("Symbol %qs at %L already has an explicit interface",
2030 : sym->name, where);
2031 0 : return false;
2032 : }
2033 :
2034 149675 : if (source == IFSRC_IFBODY && (sym->attr.dimension || sym->attr.allocatable))
2035 : {
2036 2 : gfc_error ("%qs at %L has attributes specified outside its INTERFACE "
2037 : "body", sym->name, where);
2038 2 : return false;
2039 : }
2040 :
2041 149673 : finish:
2042 150585 : sym->formal = formal;
2043 150585 : sym->attr.if_source = source;
2044 :
2045 150585 : return true;
2046 : }
2047 :
2048 :
2049 : /* Add a type to a symbol. */
2050 :
2051 : bool
2052 270205 : gfc_add_type (gfc_symbol *sym, gfc_typespec *ts, locus *where)
2053 : {
2054 270205 : sym_flavor flavor;
2055 270205 : bt type;
2056 :
2057 270205 : if (where == NULL)
2058 5578 : where = &gfc_current_locus;
2059 :
2060 270205 : if (sym->result)
2061 8158 : type = sym->result->ts.type;
2062 : else
2063 262047 : type = sym->ts.type;
2064 :
2065 270205 : if (sym->attr.result && type == BT_UNKNOWN && sym->ns->proc_name)
2066 4320 : type = sym->ns->proc_name->ts.type;
2067 :
2068 270205 : if (type != BT_UNKNOWN && !(sym->attr.function && sym->attr.implicit_type)
2069 93 : && !(gfc_state_stack->previous && gfc_state_stack->previous->previous
2070 75 : && gfc_state_stack->previous->previous->state == COMP_SUBMODULE)
2071 52 : && !sym->attr.module_procedure)
2072 : {
2073 26 : if (sym->attr.use_assoc)
2074 2 : gfc_error ("Symbol %qs at %L conflicts with symbol from module %qs, "
2075 : "use-associated at %L", sym->name, where, sym->module,
2076 : &sym->declared_at);
2077 24 : else if (sym->attr.function && sym->attr.result)
2078 1 : gfc_error ("Symbol %qs at %L already has basic type of %s",
2079 1 : sym->ns->proc_name->name, where, gfc_basic_typename (type));
2080 : else
2081 23 : gfc_error ("Symbol %qs at %L already has basic type of %s", sym->name,
2082 : where, gfc_basic_typename (type));
2083 26 : return false;
2084 : }
2085 :
2086 270179 : if (sym->attr.procedure && sym->ts.interface)
2087 : {
2088 1 : gfc_error ("Procedure %qs at %L may not have basic type of %s",
2089 : sym->name, where, gfc_basic_typename (ts->type));
2090 1 : return false;
2091 : }
2092 :
2093 270178 : flavor = sym->attr.flavor;
2094 :
2095 270178 : if (flavor == FL_PROGRAM || flavor == FL_BLOCK_DATA || flavor == FL_MODULE
2096 270178 : || flavor == FL_LABEL
2097 270176 : || (flavor == FL_PROCEDURE && sym->attr.subroutine)
2098 270174 : || flavor == FL_DERIVED || flavor == FL_NAMELIST)
2099 : {
2100 4 : gfc_error ("Symbol %qs at %L cannot have a type",
2101 4 : sym->ns->proc_name ? sym->ns->proc_name->name : sym->name,
2102 : where);
2103 4 : return false;
2104 : }
2105 :
2106 270174 : sym->ts = *ts;
2107 270174 : return true;
2108 : }
2109 :
2110 :
2111 : /* Clears all attributes. */
2112 :
2113 : void
2114 7433980 : gfc_clear_attr (symbol_attribute *attr)
2115 : {
2116 7433980 : memset (attr, 0, sizeof (symbol_attribute));
2117 7433980 : }
2118 :
2119 :
2120 : /* Check for missing attributes in the new symbol. Currently does
2121 : nothing, but it's not clear that it is unnecessary yet. */
2122 :
2123 : bool
2124 385882 : gfc_missing_attr (symbol_attribute *attr ATTRIBUTE_UNUSED,
2125 : locus *where ATTRIBUTE_UNUSED)
2126 : {
2127 :
2128 385882 : return true;
2129 : }
2130 :
2131 :
2132 : /* Copy an attribute to a symbol attribute, bit by bit. Some
2133 : attributes have a lot of side-effects but cannot be present given
2134 : where we are called from, so we ignore some bits. */
2135 :
2136 : bool
2137 268506 : gfc_copy_attr (symbol_attribute *dest, symbol_attribute *src, locus *where)
2138 : {
2139 268506 : int is_proc_lang_bind_spec;
2140 :
2141 : /* In line with the other attributes, we only add bits but do not remove
2142 : them; cf. also PR 41034. */
2143 268506 : dest->ext_attr |= src->ext_attr;
2144 :
2145 268506 : if (src->allocatable && !gfc_add_allocatable (dest, where))
2146 4 : goto fail;
2147 :
2148 268502 : if (src->automatic && !gfc_add_automatic (dest, NULL, where))
2149 2 : goto fail;
2150 268500 : if (src->dimension && !gfc_add_dimension (dest, NULL, where))
2151 0 : goto fail;
2152 268500 : if (src->codimension && !gfc_add_codimension (dest, NULL, where))
2153 0 : goto fail;
2154 268500 : if (src->contiguous && !gfc_add_contiguous (dest, NULL, where))
2155 2 : goto fail;
2156 268498 : if (src->optional && !gfc_add_optional (dest, where))
2157 1 : goto fail;
2158 268497 : if (src->pointer && !gfc_add_pointer (dest, where))
2159 8 : goto fail;
2160 268489 : if (src->is_protected && !gfc_add_protected (dest, NULL, where))
2161 0 : goto fail;
2162 268489 : if (src->save && !gfc_add_save (dest, src->save, NULL, where))
2163 4 : goto fail;
2164 268485 : if (src->value && !gfc_add_value (dest, NULL, where))
2165 2 : goto fail;
2166 268483 : if (src->volatile_ && !gfc_add_volatile (dest, NULL, where))
2167 0 : goto fail;
2168 268483 : if (src->asynchronous && !gfc_add_asynchronous (dest, NULL, where))
2169 0 : goto fail;
2170 268483 : if (src->omp_groupprivate
2171 268483 : && !gfc_add_omp_groupprivate (dest, NULL, where))
2172 0 : goto fail;
2173 268483 : if (src->threadprivate
2174 268483 : && !gfc_add_threadprivate (dest, NULL, where))
2175 0 : goto fail;
2176 268483 : if (src->omp_declare_target
2177 268483 : && !gfc_add_omp_declare_target (dest, NULL, where))
2178 0 : goto fail;
2179 268483 : if (src->omp_declare_target_link
2180 268483 : && !gfc_add_omp_declare_target_link (dest, NULL, where))
2181 0 : goto fail;
2182 268483 : if (src->omp_declare_target_local
2183 268483 : && !gfc_add_omp_declare_target_local (dest, NULL, where))
2184 0 : goto fail;
2185 268483 : if (src->oacc_declare_create
2186 268483 : && !gfc_add_oacc_declare_create (dest, NULL, where))
2187 0 : goto fail;
2188 268483 : if (src->oacc_declare_copyin
2189 268483 : && !gfc_add_oacc_declare_copyin (dest, NULL, where))
2190 0 : goto fail;
2191 268483 : if (src->oacc_declare_deviceptr
2192 268483 : && !gfc_add_oacc_declare_deviceptr (dest, NULL, where))
2193 0 : goto fail;
2194 268483 : if (src->oacc_declare_device_resident
2195 268483 : && !gfc_add_oacc_declare_device_resident (dest, NULL, where))
2196 0 : goto fail;
2197 268483 : if (src->target && !gfc_add_target (dest, where))
2198 2 : goto fail;
2199 268481 : if (src->dummy && !gfc_add_dummy (dest, NULL, where))
2200 0 : goto fail;
2201 268481 : if (src->result && !gfc_add_result (dest, NULL, where))
2202 0 : goto fail;
2203 268481 : if (src->entry)
2204 0 : dest->entry = 1;
2205 :
2206 268481 : if (src->in_namelist && !gfc_add_in_namelist (dest, NULL, where))
2207 0 : goto fail;
2208 :
2209 268481 : if (src->in_common && !gfc_add_in_common (dest, NULL, where))
2210 0 : goto fail;
2211 :
2212 268481 : if (src->generic && !gfc_add_generic (dest, NULL, where))
2213 0 : goto fail;
2214 268481 : if (src->function && !gfc_add_function (dest, NULL, where))
2215 0 : goto fail;
2216 268481 : if (src->subroutine && !gfc_add_subroutine (dest, NULL, where))
2217 0 : goto fail;
2218 :
2219 268481 : if (src->sequence && !gfc_add_sequence (dest, NULL, where))
2220 0 : goto fail;
2221 268481 : if (src->elemental && !gfc_add_elemental (dest, where))
2222 0 : goto fail;
2223 268481 : if (src->pure && !gfc_add_pure (dest, where))
2224 0 : goto fail;
2225 268481 : if (src->recursive && !gfc_add_recursive (dest, where))
2226 0 : goto fail;
2227 :
2228 268481 : if (src->flavor != FL_UNKNOWN
2229 268481 : && !gfc_add_flavor (dest, src->flavor, NULL, where))
2230 438 : goto fail;
2231 :
2232 268043 : if (src->intent != INTENT_UNKNOWN
2233 268043 : && !gfc_add_intent (dest, src->intent, where))
2234 0 : goto fail;
2235 :
2236 268043 : if (src->access != ACCESS_UNKNOWN
2237 268043 : && !gfc_add_access (dest, src->access, NULL, where))
2238 1 : goto fail;
2239 :
2240 268042 : if (!gfc_missing_attr (dest, where))
2241 0 : goto fail;
2242 :
2243 268042 : if (src->cray_pointer && !gfc_add_cray_pointer (dest, where))
2244 0 : goto fail;
2245 268042 : if (src->cray_pointee && !gfc_add_cray_pointee (dest, where))
2246 0 : goto fail;
2247 :
2248 268042 : is_proc_lang_bind_spec = (src->flavor == FL_PROCEDURE ? 1 : 0);
2249 268042 : if (src->is_bind_c
2250 268042 : && !gfc_add_is_bind_c (dest, NULL, where, is_proc_lang_bind_spec))
2251 : return false;
2252 :
2253 268041 : if (src->is_c_interop)
2254 0 : dest->is_c_interop = 1;
2255 268041 : if (src->is_iso_c)
2256 0 : dest->is_iso_c = 1;
2257 :
2258 268041 : if (src->external && !gfc_add_external (dest, where))
2259 5 : goto fail;
2260 268036 : if (src->intrinsic && !gfc_add_intrinsic (dest, where))
2261 4 : goto fail;
2262 268032 : if (src->proc_pointer)
2263 431 : dest->proc_pointer = 1;
2264 :
2265 : return true;
2266 :
2267 : fail:
2268 : return false;
2269 : }
2270 :
2271 :
2272 : /* A function to generate a dummy argument symbol using that from the
2273 : interface declaration. Can be used for the result symbol as well if
2274 : the flag is set. */
2275 :
2276 : int
2277 356 : gfc_copy_dummy_sym (gfc_symbol **dsym, gfc_symbol *sym, int result)
2278 : {
2279 356 : int rc;
2280 :
2281 356 : rc = gfc_get_symbol (sym->name, NULL, dsym);
2282 356 : if (rc)
2283 : return rc;
2284 :
2285 356 : if (!gfc_add_type (*dsym, &(sym->ts), &gfc_current_locus))
2286 : return 1;
2287 :
2288 356 : if (sym->attr.external
2289 11 : && (sym->attr.codimension || sym->attr.dimension))
2290 1 : (*dsym)->attr.if_source = IFSRC_DECL;
2291 :
2292 356 : if (!gfc_copy_attr (&(*dsym)->attr, &(sym->attr),
2293 : &gfc_current_locus))
2294 : return 1;
2295 :
2296 356 : if ((*dsym)->attr.dimension)
2297 64 : (*dsym)->as = gfc_copy_array_spec (sym->as);
2298 :
2299 356 : (*dsym)->attr.class_ok = sym->attr.class_ok;
2300 :
2301 356 : if ((*dsym) != NULL && !result
2302 310 : && (!gfc_add_dummy(&(*dsym)->attr, (*dsym)->name, NULL)
2303 310 : || !gfc_missing_attr (&(*dsym)->attr, NULL)))
2304 0 : return 1;
2305 356 : else if ((*dsym) != NULL && result
2306 402 : && (!gfc_add_result(&(*dsym)->attr, (*dsym)->name, NULL)
2307 46 : || !gfc_missing_attr (&(*dsym)->attr, NULL)))
2308 0 : return 1;
2309 :
2310 : return 0;
2311 : }
2312 :
2313 :
2314 : /************** Component name management ************/
2315 :
2316 : /* Component names of a derived type form their own little namespaces
2317 : that are separate from all other spaces. The space is composed of
2318 : a singly linked list of gfc_component structures whose head is
2319 : located in the parent symbol. */
2320 :
2321 :
2322 : /* Add a component name to a symbol. The call fails if the name is
2323 : already present. On success, the component pointer is modified to
2324 : point to the additional component structure. */
2325 :
2326 : bool
2327 129290 : gfc_add_component (gfc_symbol *sym, const char *name,
2328 : gfc_component **component)
2329 : {
2330 129290 : gfc_component *p, *tail;
2331 :
2332 : /* Check for existing components with the same name, but not for union
2333 : components or containers. Unions and maps are anonymous so they have
2334 : unique internal names which will never conflict.
2335 : Don't use gfc_find_component here because it calls gfc_use_derived,
2336 : but the derived type may not be fully defined yet. */
2337 129290 : tail = NULL;
2338 :
2339 419026 : for (p = sym->components; p; p = p->next)
2340 : {
2341 289740 : if (strcmp (p->name, name) == 0)
2342 : {
2343 4 : gfc_error ("Component %qs at %C already declared at %L",
2344 : name, &p->loc);
2345 4 : return false;
2346 : }
2347 :
2348 289736 : tail = p;
2349 : }
2350 :
2351 129286 : if (sym->attr.extension
2352 129286 : && gfc_find_component (sym->components->ts.u.derived,
2353 : name, true, true, NULL))
2354 : {
2355 2 : gfc_error ("Component %qs at %C already in the parent type "
2356 2 : "at %L", name, &sym->components->ts.u.derived->declared_at);
2357 2 : return false;
2358 : }
2359 :
2360 : /* Allocate a new component. */
2361 129284 : p = gfc_get_component ();
2362 :
2363 129284 : if (tail == NULL)
2364 40385 : sym->components = p;
2365 : else
2366 88899 : tail->next = p;
2367 :
2368 129284 : p->name = gfc_get_string ("%s", name);
2369 129284 : p->loc = gfc_current_locus;
2370 129284 : p->ts.type = BT_UNKNOWN;
2371 :
2372 129284 : *component = p;
2373 129284 : return true;
2374 : }
2375 :
2376 :
2377 : /* Recursive function to switch derived types of all symbol in a
2378 : namespace. */
2379 :
2380 : static void
2381 0 : switch_types (gfc_symtree *st, gfc_symbol *from, gfc_symbol *to)
2382 : {
2383 0 : gfc_symbol *sym;
2384 :
2385 0 : if (st == NULL)
2386 0 : return;
2387 :
2388 0 : sym = st->n.sym;
2389 0 : if (sym->ts.type == BT_DERIVED && sym->ts.u.derived == from)
2390 0 : sym->ts.u.derived = to;
2391 :
2392 0 : switch_types (st->left, from, to);
2393 0 : switch_types (st->right, from, to);
2394 : }
2395 :
2396 :
2397 : /* This subroutine is called when a derived type is used in order to
2398 : make the final determination about which version to use. The
2399 : standard requires that a type be defined before it is 'used', but
2400 : such types can appear in IMPLICIT statements before the actual
2401 : definition. 'Using' in this context means declaring a variable to
2402 : be that type or using the type constructor.
2403 :
2404 : If a type is used and the components haven't been defined, then we
2405 : have to have a derived type in a parent unit. We find the node in
2406 : the other namespace and point the symtree node in this namespace to
2407 : that node. Further reference to this name point to the correct
2408 : node. If we can't find the node in a parent namespace, then we have
2409 : an error.
2410 :
2411 : This subroutine takes a pointer to a symbol node and returns a
2412 : pointer to the translated node or NULL for an error. Usually there
2413 : is no translation and we return the node we were passed. */
2414 :
2415 : gfc_symbol *
2416 367333 : gfc_use_derived (gfc_symbol *sym)
2417 : {
2418 367333 : gfc_symbol *s;
2419 367333 : gfc_typespec *t;
2420 367333 : gfc_symtree *st;
2421 367333 : int i;
2422 :
2423 367333 : if (!sym)
2424 : return NULL;
2425 :
2426 367329 : if (sym->attr.unlimited_polymorphic)
2427 : return sym;
2428 :
2429 365639 : if (sym->attr.generic)
2430 0 : sym = gfc_find_dt_in_generic (sym);
2431 :
2432 365639 : if (sym->components != NULL || sym->attr.zero_comp)
2433 : return sym; /* Already defined. */
2434 :
2435 24 : if (sym->ns->parent == NULL)
2436 9 : goto bad;
2437 :
2438 15 : if (gfc_find_symbol (sym->name, sym->ns->parent, 1, &s))
2439 : {
2440 0 : gfc_error ("Symbol %qs at %C is ambiguous", sym->name);
2441 0 : return NULL;
2442 : }
2443 :
2444 15 : if (s == NULL || !gfc_fl_struct (s->attr.flavor))
2445 15 : goto bad;
2446 :
2447 : /* Get rid of symbol sym, translating all references to s. */
2448 0 : for (i = 0; i < GFC_LETTERS; i++)
2449 : {
2450 0 : t = &sym->ns->default_type[i];
2451 0 : if (t->u.derived == sym)
2452 0 : t->u.derived = s;
2453 : }
2454 :
2455 0 : st = gfc_find_symtree (sym->ns->sym_root, sym->name);
2456 0 : st->n.sym = s;
2457 :
2458 0 : s->refs++;
2459 :
2460 : /* Unlink from list of modified symbols. */
2461 0 : gfc_commit_symbol (sym);
2462 :
2463 0 : switch_types (sym->ns->sym_root, sym, s);
2464 :
2465 : /* TODO: Also have to replace sym -> s in other lists like
2466 : namelists, common lists and interface lists. */
2467 0 : gfc_free_symbol (sym);
2468 :
2469 0 : return s;
2470 :
2471 24 : bad:
2472 24 : gfc_error ("Derived type %qs at %C is being used before it is defined",
2473 : sym->name);
2474 24 : return NULL;
2475 : }
2476 :
2477 :
2478 : /* Find all derived types in the uppermost namespace that have a component
2479 : a component called name and stash them in the assoc field of an
2480 : associate name variable.
2481 : This is used to infer the derived type of an associate name, whose selector
2482 : is a sibling derived type function that has not yet been parsed. Either
2483 : the derived type is use associated in both contained and sibling procedures
2484 : or it appears in the uppermost namespace. */
2485 :
2486 : static int cts = 0;
2487 : static void
2488 14116 : find_derived_types (gfc_symbol *sym, gfc_symtree *st, const char *name,
2489 : bool contained, bool stash)
2490 : {
2491 14116 : if (st->n.sym && st->n.sym->attr.flavor == FL_DERIVED
2492 2572 : && !st->n.sym->attr.is_class
2493 2084 : && ((contained && st->n.sym->attr.use_assoc) || !contained)
2494 16184 : && gfc_find_component (st->n.sym, name, true, true, NULL))
2495 : {
2496 : /* Do the stashing, if required. */
2497 894 : cts++;
2498 894 : if (stash)
2499 : {
2500 822 : if (sym->assoc->derived_types)
2501 336 : st->n.sym->dt_next = sym->assoc->derived_types;
2502 822 : sym->assoc->derived_types = st->n.sym;
2503 : }
2504 : }
2505 :
2506 14116 : if (st->left)
2507 5598 : find_derived_types (sym, st->left, name, contained, stash);
2508 :
2509 14116 : if (st->right)
2510 6528 : find_derived_types (sym, st->right, name, contained, stash);
2511 14116 : }
2512 :
2513 : int
2514 1044 : gfc_find_derived_types (gfc_symbol *sym, gfc_namespace *ns,
2515 : const char *name, bool stash)
2516 : {
2517 1044 : gfc_namespace *encompassing = NULL;
2518 1044 : gcc_assert (sym->assoc);
2519 :
2520 1044 : cts = 0;
2521 3144 : while (ns->parent)
2522 : {
2523 2100 : if (!ns->parent->parent && ns->proc_name
2524 1044 : && (ns->proc_name->attr.function || ns->proc_name->attr.subroutine))
2525 2100 : encompassing = ns;
2526 : ns = ns->parent;
2527 : }
2528 :
2529 : /* Search the top level namespace first. */
2530 1044 : find_derived_types (sym, ns->sym_root, name, false, stash);
2531 :
2532 : /* Then the encompassing namespace. */
2533 1044 : if (encompassing && encompassing != ns)
2534 946 : find_derived_types (sym, encompassing->sym_root, name, true, stash);
2535 :
2536 1044 : return cts;
2537 : }
2538 :
2539 : /* Find the component with the given name in the union type symbol.
2540 : If ref is not NULL it will be set to the chain of components through which
2541 : the component can actually be accessed. This is necessary for unions because
2542 : intermediate structures may be maps, nested structures, or other unions,
2543 : all of which may (or must) be 'anonymous' to user code. */
2544 :
2545 : static gfc_component *
2546 2192 : find_union_component (gfc_symbol *un, const char *name,
2547 : bool noaccess, gfc_ref **ref)
2548 : {
2549 2192 : gfc_component *m, *check;
2550 2192 : gfc_ref *sref, *tmp;
2551 :
2552 3983 : for (m = un->components; m; m = m->next)
2553 : {
2554 3483 : check = gfc_find_component (m->ts.u.derived, name, noaccess, true, &tmp);
2555 3483 : if (check == NULL)
2556 1791 : continue;
2557 :
2558 : /* Found component somewhere in m; chain the refs together. */
2559 1692 : if (ref)
2560 : {
2561 : /* Map ref. */
2562 1692 : sref = gfc_get_ref ();
2563 1692 : sref->type = REF_COMPONENT;
2564 1692 : sref->u.c.component = m;
2565 1692 : sref->u.c.sym = m->ts.u.derived;
2566 1692 : sref->next = tmp;
2567 :
2568 1692 : *ref = sref;
2569 : }
2570 : /* Other checks (such as access) were done in the recursive calls. */
2571 : return check;
2572 : }
2573 : return NULL;
2574 : }
2575 :
2576 :
2577 : /* Recursively append candidate COMPONENT structures to CANDIDATES. Store
2578 : the number of total candidates in CANDIDATES_LEN. */
2579 :
2580 : static void
2581 34 : lookup_component_fuzzy_find_candidates (gfc_component *component,
2582 : char **&candidates,
2583 : size_t &candidates_len)
2584 : {
2585 81 : for (gfc_component *p = component; p; p = p->next)
2586 47 : vec_push (candidates, candidates_len, p->name);
2587 34 : }
2588 :
2589 :
2590 : /* Lookup component MEMBER fuzzily, taking names in COMPONENT into account. */
2591 :
2592 : static const char*
2593 34 : lookup_component_fuzzy (const char *member, gfc_component *component)
2594 : {
2595 34 : char **candidates = NULL;
2596 34 : size_t candidates_len = 0;
2597 34 : lookup_component_fuzzy_find_candidates (component, candidates,
2598 : candidates_len);
2599 34 : return gfc_closest_fuzzy_match (member, candidates);
2600 : }
2601 :
2602 :
2603 : /* Given a derived type node and a component name, try to locate the
2604 : component structure. Returns the NULL pointer if the component is
2605 : not found or the components are private. If noaccess is set, no access
2606 : checks are done. If silent is set, an error will not be generated if
2607 : the component cannot be found or accessed.
2608 :
2609 : If ref is not NULL, *ref is set to represent the chain of components
2610 : required to get to the ultimate component.
2611 :
2612 : If the component is simply a direct subcomponent, or is inherited from a
2613 : parent derived type in the given derived type, this is a single ref with its
2614 : component set to the returned component.
2615 :
2616 : Otherwise, *ref is constructed as a chain of subcomponents. This occurs
2617 : when the component is found through an implicit chain of nested union and
2618 : map components. Unions and maps are "anonymous" substructures in FORTRAN
2619 : which cannot be explicitly referenced, but the reference chain must be
2620 : considered as in C for backend translation to correctly compute layouts.
2621 : (For example, x.a may refer to x->(UNION)->(MAP)->(UNION)->(MAP)->a). */
2622 :
2623 : gfc_component *
2624 340662 : gfc_find_component (gfc_symbol *sym, const char *name,
2625 : bool noaccess, bool silent, gfc_ref **ref)
2626 : {
2627 340662 : gfc_component *p, *check;
2628 340662 : gfc_ref *sref = NULL, *tmp = NULL;
2629 :
2630 340662 : if (name == NULL || sym == NULL)
2631 : return NULL;
2632 :
2633 335667 : if (sym->attr.flavor == FL_DERIVED)
2634 326904 : sym = gfc_use_derived (sym);
2635 : else
2636 8763 : gcc_assert (gfc_fl_struct (sym->attr.flavor));
2637 :
2638 326904 : if (sym == NULL)
2639 : return NULL;
2640 :
2641 : /* Handle UNIONs specially - mutually recursive with gfc_find_component. */
2642 335665 : if (sym->attr.flavor == FL_UNION)
2643 500 : return find_union_component (sym, name, noaccess, ref);
2644 :
2645 335165 : if (ref) *ref = NULL;
2646 729123 : for (p = sym->components; p; p = p->next)
2647 : {
2648 : /* Nest search into union's maps. */
2649 693876 : if (p->ts.type == BT_UNION)
2650 : {
2651 1692 : check = find_union_component (p->ts.u.derived, name, noaccess, &tmp);
2652 1692 : if (check != NULL)
2653 : {
2654 : /* Union ref. */
2655 1692 : if (ref)
2656 : {
2657 1252 : sref = gfc_get_ref ();
2658 1252 : sref->type = REF_COMPONENT;
2659 1252 : sref->u.c.component = p;
2660 1252 : sref->u.c.sym = p->ts.u.derived;
2661 1252 : sref->next = tmp;
2662 1252 : *ref = sref;
2663 : }
2664 1692 : return check;
2665 : }
2666 : }
2667 692184 : else if (strcmp (p->name, name) == 0)
2668 : break;
2669 :
2670 393958 : continue;
2671 : }
2672 :
2673 333473 : if (p && sym->attr.use_assoc && !noaccess)
2674 : {
2675 51955 : bool is_parent_comp = sym->attr.extension && (p == sym->components);
2676 51955 : if (p->attr.access == ACCESS_PRIVATE ||
2677 : (p->attr.access != ACCESS_PUBLIC
2678 51100 : && sym->component_access == ACCESS_PRIVATE
2679 8 : && !is_parent_comp))
2680 : {
2681 14 : if (!silent)
2682 14 : gfc_error ("Component %qs at %C is a PRIVATE component of %qs",
2683 : name, sym->name);
2684 14 : return NULL;
2685 : }
2686 : }
2687 :
2688 : if (p == NULL
2689 35247 : && sym->attr.extension
2690 23740 : && sym->components->ts.type == BT_DERIVED)
2691 : {
2692 23740 : p = gfc_find_component (sym->components->ts.u.derived, name,
2693 : noaccess, silent, ref);
2694 : /* Do not overwrite the error. */
2695 23740 : if (p == NULL)
2696 : return p;
2697 : }
2698 :
2699 333042 : if (p == NULL && !silent)
2700 : {
2701 34 : const char *guessed = lookup_component_fuzzy (name, sym->components);
2702 34 : if (guessed)
2703 10 : gfc_error ("%qs at %C is not a member of the %qs structure"
2704 : "; did you mean %qs?",
2705 : name, sym->name, guessed);
2706 : else
2707 24 : gfc_error ("%qs at %C is not a member of the %qs structure",
2708 : name, sym->name);
2709 : }
2710 :
2711 : /* Component was found; build the ultimate component reference. */
2712 333042 : if (p != NULL && ref)
2713 : {
2714 262398 : tmp = gfc_get_ref ();
2715 262398 : tmp->type = REF_COMPONENT;
2716 262398 : tmp->u.c.component = p;
2717 262398 : tmp->u.c.sym = sym;
2718 : /* Link the final component ref to the end of the chain of subrefs. */
2719 262398 : if (sref)
2720 : {
2721 : *ref = sref;
2722 : for (; sref->next; sref = sref->next)
2723 : ;
2724 : sref->next = tmp;
2725 : }
2726 : else
2727 262398 : *ref = tmp;
2728 : }
2729 :
2730 : return p;
2731 393958 : }
2732 :
2733 :
2734 : /* Given a symbol, free all of the component structures and everything
2735 : they point to. */
2736 :
2737 : static void
2738 6111210 : free_components (gfc_component *p)
2739 : {
2740 6111210 : gfc_component *q;
2741 :
2742 6387067 : for (; p; p = q)
2743 : {
2744 275857 : q = p->next;
2745 :
2746 275857 : gfc_free_array_spec (p->as);
2747 275857 : gfc_free_expr (p->initializer);
2748 275857 : if (p->kind_expr)
2749 252 : gfc_free_expr (p->kind_expr);
2750 275857 : if (p->param_list)
2751 190 : gfc_free_actual_arglist (p->param_list);
2752 275857 : free (p->tb);
2753 275857 : p->tb = NULL;
2754 275857 : free (p);
2755 : }
2756 6111210 : }
2757 :
2758 :
2759 : /******************** Statement label management ********************/
2760 :
2761 : /* Comparison function for statement labels, used for managing the
2762 : binary tree. */
2763 :
2764 : static int
2765 7733 : compare_st_labels (void *a1, void *b1)
2766 : {
2767 7733 : gfc_st_label *a = (gfc_st_label *) a1;
2768 7733 : gfc_st_label *b = (gfc_st_label *) b1;
2769 :
2770 7733 : if (a->omp_region == b->omp_region)
2771 7670 : return b->value - a->value;
2772 : else
2773 63 : return b->omp_region - a->omp_region;
2774 : }
2775 :
2776 :
2777 : /* Free a single gfc_st_label structure, making sure the tree is not
2778 : messed up. This function is called only when some parse error
2779 : occurs. */
2780 :
2781 : void
2782 3 : gfc_free_st_label (gfc_st_label *label)
2783 : {
2784 :
2785 3 : if (label == NULL)
2786 : return;
2787 :
2788 3 : gfc_delete_bbt (&label->ns->st_labels, label, compare_st_labels);
2789 :
2790 3 : if (label->format != NULL)
2791 0 : gfc_free_expr (label->format);
2792 :
2793 3 : free (label);
2794 : }
2795 :
2796 :
2797 : /* Free a whole tree of gfc_st_label structures. */
2798 :
2799 : static void
2800 525160 : free_st_labels (gfc_st_label *label)
2801 : {
2802 :
2803 525160 : if (label == NULL)
2804 : return;
2805 :
2806 4698 : free_st_labels (label->left);
2807 4698 : free_st_labels (label->right);
2808 :
2809 4698 : if (label->format != NULL)
2810 1014 : gfc_free_expr (label->format);
2811 4698 : free (label);
2812 : }
2813 :
2814 :
2815 : /* Given a label number, search for and return a pointer to the label
2816 : structure, creating it if it does not exist. */
2817 :
2818 : gfc_st_label *
2819 13566 : gfc_get_st_label (int labelno)
2820 : {
2821 13566 : gfc_st_label *lp;
2822 13566 : gfc_namespace *ns;
2823 13566 : int omp_region = gfc_omp_metadirective_region_stack.last ();
2824 :
2825 13566 : if (gfc_current_state () == COMP_DERIVED)
2826 3 : ns = gfc_current_block ()->f2k_derived;
2827 : else
2828 : {
2829 : /* Find the namespace of the scoping unit:
2830 : If we're in a BLOCK construct, jump to the parent namespace. */
2831 13563 : ns = gfc_current_ns;
2832 13574 : while (ns->proc_name && ns->proc_name->attr.flavor == FL_LABEL)
2833 11 : ns = ns->parent;
2834 : }
2835 :
2836 : /* First see if the label is already in this namespace. */
2837 13566 : gcc_checking_assert (gfc_omp_metadirective_region_stack.length () > 0);
2838 18343 : for (int omp_region_idx = gfc_omp_metadirective_region_stack.length () - 1;
2839 18343 : omp_region_idx >= 0; omp_region_idx--)
2840 : {
2841 13642 : int omp_region2 = gfc_omp_metadirective_region_stack[omp_region_idx];
2842 13642 : lp = ns->st_labels;
2843 31781 : while (lp)
2844 : {
2845 27004 : if (lp->omp_region == omp_region2)
2846 : {
2847 26746 : if (lp->value == labelno)
2848 : return lp;
2849 17881 : if (lp->value < labelno)
2850 13080 : lp = lp->left;
2851 : else
2852 4801 : lp = lp->right;
2853 : }
2854 258 : else if (lp->omp_region < omp_region2)
2855 177 : lp = lp->left;
2856 : else
2857 81 : lp = lp->right;
2858 : }
2859 : }
2860 :
2861 4701 : lp = XCNEW (gfc_st_label);
2862 :
2863 4701 : lp->value = labelno;
2864 4701 : lp->defined = ST_LABEL_UNKNOWN;
2865 4701 : lp->referenced = ST_LABEL_UNKNOWN;
2866 4701 : lp->ns = ns;
2867 4701 : lp->omp_region = omp_region;
2868 :
2869 4701 : gfc_insert_bbt (&ns->st_labels, lp, compare_st_labels);
2870 :
2871 4701 : return lp;
2872 : }
2873 :
2874 : /* Rebind a statement label to a new OpenMP region. If a label with the same
2875 : value already exists in the new region, update it and return it. Otherwise,
2876 : move the label to the new region. */
2877 :
2878 : gfc_st_label *
2879 44 : gfc_rebind_label (gfc_st_label *label, int new_omp_region)
2880 : {
2881 44 : gfc_st_label *lp = label->ns->st_labels;
2882 44 : int labelno = label->value;
2883 :
2884 106 : while (lp)
2885 : {
2886 97 : if (lp->omp_region == new_omp_region)
2887 : {
2888 38 : if (lp->value == labelno)
2889 : {
2890 35 : if (lp == label)
2891 : return label;
2892 0 : if (lp->defined == ST_LABEL_UNKNOWN
2893 0 : && label->defined != ST_LABEL_UNKNOWN)
2894 0 : lp->defined = label->defined;
2895 0 : if (lp->referenced == ST_LABEL_UNKNOWN
2896 0 : && label->referenced != ST_LABEL_UNKNOWN)
2897 0 : lp->referenced = label->referenced;
2898 0 : if (lp->format == NULL && label->format != NULL)
2899 0 : lp->format = label->format;
2900 0 : gfc_delete_bbt (&label->ns->st_labels, label, compare_st_labels);
2901 0 : return lp;
2902 : }
2903 3 : if (lp->value < labelno)
2904 2 : lp = lp->left;
2905 : else
2906 1 : lp = lp->right;
2907 : }
2908 59 : else if (lp->omp_region < new_omp_region)
2909 29 : lp = lp->left;
2910 : else
2911 30 : lp = lp->right;
2912 : }
2913 :
2914 9 : gfc_delete_bbt (&label->ns->st_labels, label, compare_st_labels);
2915 9 : label->left = nullptr;
2916 9 : label->right = nullptr;
2917 9 : label->omp_region = new_omp_region;
2918 9 : gfc_insert_bbt (&label->ns->st_labels, label, compare_st_labels);
2919 9 : return label;
2920 : }
2921 :
2922 : /* Called when a statement with a statement label is about to be
2923 : accepted. We add the label to the list of the current namespace,
2924 : making sure it hasn't been defined previously and referenced
2925 : correctly. */
2926 :
2927 : void
2928 4685 : gfc_define_st_label (gfc_st_label *lp, gfc_sl_type type, locus *label_locus)
2929 : {
2930 4685 : int labelno;
2931 :
2932 4685 : labelno = lp->value;
2933 :
2934 4685 : if (lp->defined != ST_LABEL_UNKNOWN && !gfc_in_omp_metadirective_body)
2935 2 : gfc_error ("Duplicate statement label %d at %L and %L", labelno,
2936 : &lp->where, label_locus);
2937 : else
2938 : {
2939 4683 : lp->where = *label_locus;
2940 :
2941 4683 : switch (type)
2942 : {
2943 1017 : case ST_LABEL_FORMAT:
2944 1017 : if (lp->referenced == ST_LABEL_TARGET
2945 1017 : || lp->referenced == ST_LABEL_DO_TARGET)
2946 0 : gfc_error ("Label %d at %C already referenced as branch target",
2947 : labelno);
2948 : else
2949 1017 : lp->defined = ST_LABEL_FORMAT;
2950 :
2951 : break;
2952 :
2953 3659 : case ST_LABEL_TARGET:
2954 3659 : case ST_LABEL_DO_TARGET:
2955 3659 : if (lp->referenced == ST_LABEL_FORMAT)
2956 2 : gfc_error ("Label %d at %C already referenced as a format label",
2957 : labelno);
2958 : else
2959 3657 : lp->defined = type;
2960 :
2961 1720 : if (lp->referenced == ST_LABEL_DO_TARGET && type != ST_LABEL_DO_TARGET
2962 3791 : && !gfc_notify_std (GFC_STD_F95_OBS | GFC_STD_F2018_DEL,
2963 : "DO termination statement which is not END DO"
2964 : " or CONTINUE with label %d at %C", labelno))
2965 : return;
2966 : break;
2967 :
2968 7 : default:
2969 7 : lp->defined = ST_LABEL_BAD_TARGET;
2970 7 : lp->referenced = ST_LABEL_BAD_TARGET;
2971 : }
2972 : }
2973 : }
2974 :
2975 :
2976 : /* Reference a label. Given a label and its type, see if that
2977 : reference is consistent with what is known about that label,
2978 : updating the unknown state. Returns false if something goes
2979 : wrong. */
2980 :
2981 : bool
2982 17977 : gfc_reference_st_label (gfc_st_label *lp, gfc_sl_type type)
2983 : {
2984 17977 : gfc_sl_type label_type;
2985 17977 : int labelno;
2986 17977 : bool rc;
2987 :
2988 17977 : if (lp == NULL)
2989 : return true;
2990 :
2991 7628 : labelno = lp->value;
2992 :
2993 7628 : if (lp->defined != ST_LABEL_UNKNOWN)
2994 : label_type = lp->defined;
2995 : else
2996 : {
2997 5968 : label_type = lp->referenced;
2998 5968 : lp->where = gfc_current_locus;
2999 : }
3000 :
3001 7628 : if (label_type == ST_LABEL_FORMAT
3002 1127 : && (type == ST_LABEL_TARGET || type == ST_LABEL_DO_TARGET))
3003 : {
3004 0 : gfc_error ("Label %d at %C previously used as a FORMAT label", labelno);
3005 0 : rc = false;
3006 0 : goto done;
3007 : }
3008 :
3009 7628 : if ((label_type == ST_LABEL_TARGET || label_type == ST_LABEL_DO_TARGET
3010 7628 : || label_type == ST_LABEL_BAD_TARGET)
3011 2440 : && type == ST_LABEL_FORMAT)
3012 : {
3013 5 : gfc_error ("Label %d at %C previously used as branch target", labelno);
3014 5 : rc = false;
3015 5 : goto done;
3016 : }
3017 :
3018 622 : if (lp->referenced == ST_LABEL_DO_TARGET && type == ST_LABEL_DO_TARGET
3019 543 : && !gfc_in_omp_metadirective_body
3020 8164 : && !gfc_notify_std (GFC_STD_F95_OBS | GFC_STD_F2018_DEL,
3021 : "Shared DO termination label %d at %C", labelno))
3022 : return false;
3023 :
3024 7623 : if (type == ST_LABEL_DO_TARGET
3025 7623 : && !gfc_notify_std (GFC_STD_F2018_OBS, "Labeled DO statement "
3026 : "at %L", &gfc_current_locus))
3027 : return false;
3028 :
3029 7623 : if (lp->referenced != ST_LABEL_DO_TARGET)
3030 7001 : lp->referenced = type;
3031 : rc = true;
3032 :
3033 : done:
3034 : return rc;
3035 : }
3036 :
3037 :
3038 : /************** Symbol table management subroutines ****************/
3039 :
3040 : /* Basic details: Fortran 95 requires a potentially unlimited number
3041 : of distinct namespaces when compiling a program unit. This case
3042 : occurs during a compilation of internal subprograms because all of
3043 : the internal subprograms must be read before we can start
3044 : generating code for the host.
3045 :
3046 : Given the tricky nature of the Fortran grammar, we must be able to
3047 : undo changes made to a symbol table if the current interpretation
3048 : of a statement is found to be incorrect. Whenever a symbol is
3049 : looked up, we make a copy of it and link to it. All of these
3050 : symbols are kept in a vector so that we can commit or
3051 : undo the changes at a later time.
3052 :
3053 : A symtree may point to a symbol node outside of its namespace. In
3054 : this case, that symbol has been used as a host associated variable
3055 : at some previous time. */
3056 :
3057 : /* Allocate a new namespace structure. Copies the implicit types from
3058 : PARENT if PARENT_TYPES is set. */
3059 :
3060 : gfc_namespace *
3061 542956 : gfc_get_namespace (gfc_namespace *parent, int parent_types)
3062 : {
3063 542956 : gfc_namespace *ns;
3064 542956 : gfc_typespec *ts;
3065 542956 : int in;
3066 542956 : int i;
3067 :
3068 542956 : ns = XCNEW (gfc_namespace);
3069 542956 : ns->sym_root = NULL;
3070 542956 : ns->uop_root = NULL;
3071 542956 : ns->tb_sym_root = NULL;
3072 542956 : ns->finalizers = NULL;
3073 542956 : ns->default_access = ACCESS_UNKNOWN;
3074 542956 : ns->parent = parent;
3075 :
3076 15745724 : for (in = GFC_INTRINSIC_BEGIN; in != GFC_INTRINSIC_END; in++)
3077 : {
3078 15202768 : ns->operator_access[in] = ACCESS_UNKNOWN;
3079 15202768 : ns->tb_op[in] = NULL;
3080 : }
3081 :
3082 : /* Initialize default implicit types. */
3083 14659812 : for (i = 'a'; i <= 'z'; i++)
3084 : {
3085 14116856 : ns->set_flag[i - 'a'] = 0;
3086 14116856 : ts = &ns->default_type[i - 'a'];
3087 :
3088 14116856 : if (parent_types && ns->parent != NULL)
3089 : {
3090 : /* Copy parent settings. */
3091 1725724 : *ts = ns->parent->default_type[i - 'a'];
3092 1725724 : continue;
3093 : }
3094 :
3095 12391132 : if (flag_implicit_none != 0)
3096 : {
3097 108550 : gfc_clear_ts (ts);
3098 108550 : continue;
3099 : }
3100 :
3101 12282582 : if ('i' <= i && i <= 'n')
3102 : {
3103 2834442 : ts->type = BT_INTEGER;
3104 2834442 : ts->kind = gfc_default_integer_kind;
3105 : }
3106 : else
3107 : {
3108 9448140 : ts->type = BT_REAL;
3109 9448140 : ts->kind = gfc_default_real_kind;
3110 : }
3111 : }
3112 :
3113 542956 : ns->refs = 1;
3114 :
3115 542956 : return ns;
3116 : }
3117 :
3118 :
3119 : /* Comparison function for symtree nodes. */
3120 :
3121 : static int
3122 34388844 : compare_symtree (void *_st1, void *_st2)
3123 : {
3124 34388844 : gfc_symtree *st1, *st2;
3125 :
3126 34388844 : st1 = (gfc_symtree *) _st1;
3127 34388844 : st2 = (gfc_symtree *) _st2;
3128 :
3129 34388844 : return strcmp (st1->name, st2->name);
3130 : }
3131 :
3132 :
3133 : /* Allocate a new symtree node and associate it with the new symbol. */
3134 :
3135 : gfc_symtree *
3136 6290828 : gfc_new_symtree (gfc_symtree **root, const char *name)
3137 : {
3138 6290828 : gfc_symtree *st;
3139 :
3140 6290828 : st = XCNEW (gfc_symtree);
3141 6290828 : st->name = gfc_get_string ("%s", name);
3142 :
3143 6290828 : gfc_insert_bbt (root, st, compare_symtree);
3144 6290828 : return st;
3145 : }
3146 :
3147 :
3148 : /* Delete a symbol from the tree. Does not free the symbol itself! */
3149 :
3150 : static void
3151 4133033 : gfc_delete_symtree (gfc_symtree **root, const char *name)
3152 : {
3153 4133033 : gfc_symtree st, *st0;
3154 4133033 : const char *p;
3155 :
3156 : /* Submodules are marked as mod.submod. When freeing a submodule
3157 : symbol, the symtree only has "submod", so adjust that here. */
3158 :
3159 4133033 : p = strrchr(name, '.');
3160 4133033 : if (p)
3161 0 : p++;
3162 : else
3163 : p = name;
3164 :
3165 4133033 : st.name = gfc_get_string ("%s", p);
3166 4133033 : st0 = (gfc_symtree *) gfc_delete_bbt (root, &st, compare_symtree);
3167 :
3168 4133033 : free (st0);
3169 4133033 : }
3170 :
3171 :
3172 : /* Given a root symtree node and a name, try to find the symbol within
3173 : the namespace. Returns NULL if the symbol is not found. */
3174 :
3175 : gfc_symtree *
3176 29908863 : gfc_find_symtree (gfc_symtree *st, const char *name)
3177 : {
3178 29908863 : int c;
3179 :
3180 128939257 : while (st != NULL)
3181 : {
3182 110960745 : c = strcmp (name, st->name);
3183 110960745 : if (c == 0)
3184 : return st;
3185 :
3186 99030394 : st = (c < 0) ? st->left : st->right;
3187 : }
3188 :
3189 : return NULL;
3190 : }
3191 :
3192 :
3193 : /* Return a symtree node with a name that is guaranteed to be unique
3194 : within the namespace and corresponds to an illegal fortran name. */
3195 :
3196 : gfc_symtree *
3197 643612 : gfc_get_unique_symtree (gfc_namespace *ns)
3198 : {
3199 643612 : char name[GFC_MAX_SYMBOL_LEN + 1];
3200 643612 : static int serial = 0;
3201 :
3202 643612 : sprintf (name, "@%d", serial++);
3203 643612 : return gfc_new_symtree (&ns->sym_root, name);
3204 : }
3205 :
3206 :
3207 : /* Given a name find a user operator node, creating it if it doesn't
3208 : exist. These are much simpler than symbols because they can't be
3209 : ambiguous with one another. */
3210 :
3211 : gfc_user_op *
3212 974 : gfc_get_uop (const char *name)
3213 : {
3214 974 : gfc_user_op *uop;
3215 974 : gfc_symtree *st;
3216 974 : gfc_namespace *ns = gfc_current_ns;
3217 :
3218 974 : if (ns->omp_udr_ns)
3219 35 : ns = ns->parent;
3220 974 : st = gfc_find_symtree (ns->uop_root, name);
3221 974 : if (st != NULL)
3222 594 : return st->n.uop;
3223 :
3224 380 : st = gfc_new_symtree (&ns->uop_root, name);
3225 :
3226 380 : uop = st->n.uop = XCNEW (gfc_user_op);
3227 380 : uop->name = gfc_get_string ("%s", name);
3228 380 : uop->access = ACCESS_UNKNOWN;
3229 380 : uop->ns = ns;
3230 :
3231 380 : return uop;
3232 : }
3233 :
3234 :
3235 : /* Given a name find the user operator node. Returns NULL if it does
3236 : not exist. */
3237 :
3238 : gfc_user_op *
3239 6882 : gfc_find_uop (const char *name, gfc_namespace *ns)
3240 : {
3241 6882 : gfc_symtree *st;
3242 :
3243 6882 : if (ns == NULL)
3244 18 : ns = gfc_current_ns;
3245 :
3246 6882 : st = gfc_find_symtree (ns->uop_root, name);
3247 6882 : return (st == NULL) ? NULL : st->n.uop;
3248 : }
3249 :
3250 :
3251 : /* Update a symbol's common_block field, and take care of the associated
3252 : memory management. */
3253 :
3254 : static void
3255 7548315 : set_symbol_common_block (gfc_symbol *sym, gfc_common_head *common_block)
3256 : {
3257 7548315 : if (sym->common_block == common_block)
3258 : return;
3259 :
3260 5855 : if (sym->common_block && sym->common_block->name[0] != '\0')
3261 : {
3262 5570 : sym->common_block->refs--;
3263 5570 : if (sym->common_block->refs == 0)
3264 1803 : free (sym->common_block);
3265 : }
3266 5855 : sym->common_block = common_block;
3267 : }
3268 :
3269 :
3270 : /* Remove a gfc_symbol structure and everything it points to. */
3271 :
3272 : void
3273 6263090 : gfc_free_symbol (gfc_symbol *&sym)
3274 : {
3275 :
3276 6263090 : if (sym == NULL)
3277 : return;
3278 :
3279 6111210 : gfc_free_array_spec (sym->as);
3280 :
3281 6111210 : free_components (sym->components);
3282 :
3283 6111210 : gfc_free_expr (sym->value);
3284 :
3285 6111210 : gfc_free_namelist (sym->namelist);
3286 :
3287 6111210 : if (sym->ns != sym->formal_ns)
3288 6060599 : gfc_free_namespace (sym->formal_ns);
3289 :
3290 6111210 : if (!sym->attr.generic_copy)
3291 6111210 : gfc_free_interface (sym->generic);
3292 :
3293 6111210 : gfc_free_formal_arglist (sym->formal);
3294 :
3295 : /* The pdt_type f2k_derived namespaces are copies of that of the pdt_template
3296 : and are only made if there are finalizers. The complete list of finalizers
3297 : is kept by the pdt_template and are freed with its f2k_derived. */
3298 6111210 : if (!sym->attr.pdt_type)
3299 6111088 : gfc_free_namespace (sym->f2k_derived);
3300 122 : else if (sym->f2k_derived && sym->f2k_derived->finalizers)
3301 : {
3302 0 : gfc_finalizer *p, *q = NULL;
3303 0 : for (p = sym->f2k_derived->finalizers; p; p = q)
3304 : {
3305 0 : q = p->next;
3306 0 : free (p);
3307 : }
3308 0 : free (sym->f2k_derived);
3309 : }
3310 :
3311 6111210 : set_symbol_common_block (sym, NULL);
3312 :
3313 6111210 : if (sym->param_list)
3314 1322 : gfc_free_actual_arglist (sym->param_list);
3315 :
3316 6111210 : free (sym);
3317 6111210 : sym = NULL;
3318 : }
3319 :
3320 :
3321 : /* Returns true if the symbol SYM has, through its FORMAL_NS field, a reference
3322 : to itself which should be eliminated for the symbol memory to be released
3323 : via normal reference counting.
3324 :
3325 : The implementation is crucial as it controls the proper release of symbols,
3326 : especially (contained) procedure symbols, which can represent a lot of memory
3327 : through the namespace of their body.
3328 :
3329 : We try to avoid freeing too much memory (causing dangling pointers), to not
3330 : leak too much (wasting memory), and to avoid expensive walks of the symbol
3331 : tree (which would be the correct way to check for a cycle). */
3332 :
3333 : bool
3334 6171851 : cyclic_reference_break_needed (gfc_symbol *sym)
3335 : {
3336 : /* Normal symbols don't reference themselves. */
3337 6171851 : if (sym->formal_ns == nullptr)
3338 : return false;
3339 :
3340 : /* Procedures at the root of the file do have a self reference, but they don't
3341 : have a reference in a parent namespace preventing the release of the
3342 : procedure namespace, so they can use the normal reference counting. */
3343 299243 : if (sym->formal_ns == sym->ns)
3344 : return false;
3345 :
3346 : /* If sym->refs == 1, we can use normal reference counting. If sym->refs > 2,
3347 : the symbol won't be freed anyway, with or without cyclic reference. */
3348 290718 : if (sym->refs != 2)
3349 : return false;
3350 :
3351 : /* Procedure symbols host-associated from a module in submodules are special,
3352 : because the namespace of the procedure block in the submodule is different
3353 : from the FORMAL_NS namespace generated by host-association. So there are
3354 : two different namespaces representing the same procedure namespace. As
3355 : FORMAL_NS comes from host-association, which only imports symbols visible
3356 : from the outside (dummy arguments basically), we can assume there is no
3357 : self reference through FORMAL_NS in that case. */
3358 46842 : if (sym->attr.host_assoc && sym->attr.used_in_submodule)
3359 351 : return false;
3360 :
3361 : /* We can assume that contained procedures have cyclic references, because
3362 : the symbol of the procedure itself is accessible in the procedure body
3363 : namespace. So we assume that symbols with a formal namespace different
3364 : from the declaration namespace and two references, one of which is about
3365 : to be removed, are procedures with just the self reference left. At this
3366 : point, the symbol SYM matches that pattern, so we return true here to
3367 : permit the release of SYM. */
3368 : return true;
3369 : }
3370 :
3371 :
3372 : /* Decrease the reference counter and free memory when we reach zero.
3373 : Returns true if the symbol has been freed, false otherwise. */
3374 :
3375 : bool
3376 6172459 : gfc_release_symbol (gfc_symbol *&sym)
3377 : {
3378 6172459 : if (sym == NULL)
3379 : return false;
3380 :
3381 6171851 : if (cyclic_reference_break_needed (sym))
3382 : {
3383 : /* As formal_ns contains a reference to sym, delete formal_ns just
3384 : before the deletion of sym. */
3385 46491 : gfc_namespace *ns = sym->formal_ns;
3386 46491 : sym->formal_ns = NULL;
3387 46491 : gfc_free_namespace (ns);
3388 : }
3389 :
3390 6171851 : sym->refs--;
3391 6171851 : if (sym->refs > 0)
3392 : return false;
3393 :
3394 6057840 : gcc_assert (sym->refs == 0);
3395 6057840 : gfc_free_symbol (sym);
3396 6057840 : return true;
3397 : }
3398 :
3399 :
3400 : /* Allocate and initialize a new symbol node. */
3401 :
3402 : gfc_symbol *
3403 6189954 : gfc_new_symbol (const char *name, gfc_namespace *ns, locus *where)
3404 : {
3405 6189954 : gfc_symbol *p;
3406 :
3407 6189954 : p = XCNEW (gfc_symbol);
3408 :
3409 6189954 : gfc_clear_ts (&p->ts);
3410 6189954 : gfc_clear_attr (&p->attr);
3411 6189954 : p->ns = ns;
3412 6189954 : p->declared_at = where ? *where : gfc_current_locus;
3413 6189954 : p->name = gfc_get_string ("%s", name);
3414 :
3415 6189954 : return p;
3416 : }
3417 :
3418 :
3419 : /* Generate an error if a symbol is ambiguous, and set the error flag
3420 : on it. */
3421 :
3422 : static void
3423 40 : ambiguous_symbol (const char *name, gfc_symtree *st)
3424 : {
3425 :
3426 40 : if (st->n.sym->error)
3427 : return;
3428 :
3429 20 : if (st->n.sym->module)
3430 17 : gfc_error ("Name %qs at %C is an ambiguous reference to %qs "
3431 : "from module %qs", name, st->n.sym->name, st->n.sym->module);
3432 : else
3433 3 : gfc_error ("Name %qs at %C is an ambiguous reference to %qs "
3434 : "from current program unit", name, st->n.sym->name);
3435 :
3436 20 : st->n.sym->error = 1;
3437 : }
3438 :
3439 :
3440 : /* If we're in a SELECT TYPE block, check if the variable 'st' matches any
3441 : selector on the stack. If yes, replace it by the corresponding temporary. */
3442 :
3443 : static void
3444 10611425 : select_type_insert_tmp (gfc_symtree **st)
3445 : {
3446 10661491 : gfc_select_type_stack *stack = select_type_stack;
3447 10836400 : for (; stack; stack = stack->prev)
3448 224975 : if ((*st)->n.sym == stack->selector && stack->tmp)
3449 : {
3450 50066 : *st = stack->tmp;
3451 50066 : select_type_insert_tmp (st);
3452 50066 : return;
3453 : }
3454 : }
3455 :
3456 :
3457 : /* Look for a symtree in the current procedure -- that is, go up to
3458 : parent namespaces but only if inside a BLOCK. Returns NULL if not found. */
3459 :
3460 : gfc_symtree*
3461 241 : gfc_find_symtree_in_proc (const char* name, gfc_namespace* ns)
3462 : {
3463 290 : while (ns)
3464 : {
3465 290 : gfc_symtree* st = gfc_find_symtree (ns->sym_root, name);
3466 290 : if (st)
3467 : return st;
3468 :
3469 51 : if (!ns->construct_entities)
3470 : break;
3471 49 : ns = ns->parent;
3472 : }
3473 :
3474 : return NULL;
3475 : }
3476 :
3477 :
3478 : /* Search for a symtree starting in the current namespace, resorting to
3479 : any parent namespaces if requested by a nonzero parent_flag.
3480 : Returns true if the name is ambiguous. */
3481 :
3482 : bool
3483 18987485 : gfc_find_sym_tree (const char *name, gfc_namespace *ns, int parent_flag,
3484 : gfc_symtree **result)
3485 : {
3486 18987485 : gfc_symtree *st;
3487 :
3488 18987485 : if (ns == NULL)
3489 7726185 : ns = gfc_current_ns;
3490 :
3491 21602275 : do
3492 : {
3493 21602275 : st = gfc_find_symtree (ns->sym_root, name);
3494 21602275 : if (st != NULL)
3495 : {
3496 10611425 : select_type_insert_tmp (&st);
3497 :
3498 10611425 : *result = st;
3499 : /* Ambiguous generic interfaces are permitted, as long
3500 : as the specific interfaces are different. */
3501 10611425 : if (st->ambiguous && !st->n.sym->attr.generic)
3502 : {
3503 36 : ambiguous_symbol (name, st);
3504 36 : return true;
3505 : }
3506 :
3507 : return false;
3508 : }
3509 :
3510 10990850 : if (!parent_flag)
3511 : break;
3512 :
3513 : /* Don't escape an interface block. */
3514 8121011 : if (ns && !ns->has_import_set
3515 8111098 : && ns->proc_name && ns->proc_name->attr.if_source == IFSRC_IFBODY)
3516 : break;
3517 :
3518 7922625 : ns = ns->parent;
3519 : }
3520 7922625 : while (ns != NULL);
3521 :
3522 8376060 : if (gfc_current_state() == COMP_DERIVED
3523 188601 : && gfc_current_block ()->attr.pdt_template)
3524 : {
3525 : gfc_symbol *der = gfc_current_block ();
3526 22622 : for (; der; der = gfc_get_derived_super_type (der))
3527 : {
3528 12689 : if (der->f2k_derived && der->f2k_derived->sym_root)
3529 : {
3530 12333 : st = gfc_find_symtree (der->f2k_derived->sym_root, name);
3531 12333 : if (st)
3532 : break;
3533 : }
3534 : }
3535 12019 : *result = st;
3536 12019 : return false;
3537 : }
3538 :
3539 8364041 : *result = NULL;
3540 :
3541 8364041 : return false;
3542 : }
3543 :
3544 :
3545 : /* Same, but returns the symbol instead. */
3546 :
3547 : int
3548 2307974 : gfc_find_symbol (const char *name, gfc_namespace *ns, int parent_flag,
3549 : gfc_symbol **result)
3550 : {
3551 2307974 : gfc_symtree *st;
3552 2307974 : int i;
3553 :
3554 2307974 : i = gfc_find_sym_tree (name, ns, parent_flag, &st);
3555 :
3556 2307974 : if (st == NULL)
3557 1741988 : *result = NULL;
3558 : else
3559 565986 : *result = st->n.sym;
3560 :
3561 2307974 : return i;
3562 : }
3563 :
3564 :
3565 : /* Tells whether there is only one set of changes in the stack. */
3566 :
3567 : static bool
3568 40700699 : single_undo_checkpoint_p (void)
3569 : {
3570 40700699 : if (latest_undo_chgset == &default_undo_chgset_var)
3571 : {
3572 40700699 : gcc_assert (latest_undo_chgset->previous == NULL);
3573 : return true;
3574 : }
3575 : else
3576 : {
3577 0 : gcc_assert (latest_undo_chgset->previous != NULL);
3578 : return false;
3579 : }
3580 : }
3581 :
3582 : /* Save symbol with the information necessary to back it out. */
3583 :
3584 : void
3585 6113230 : gfc_save_symbol_data (gfc_symbol *sym)
3586 : {
3587 6113230 : gfc_symbol *s;
3588 6113230 : unsigned i;
3589 :
3590 6113230 : if (!single_undo_checkpoint_p ())
3591 : {
3592 : /* If there is more than one change set, look for the symbol in the
3593 : current one. If it is found there, we can reuse it. */
3594 0 : FOR_EACH_VEC_ELT (latest_undo_chgset->syms, i, s)
3595 0 : if (s == sym)
3596 : {
3597 0 : gcc_assert (sym->gfc_new || sym->old_symbol != NULL);
3598 6113230 : return;
3599 : }
3600 : }
3601 6113230 : else if (sym->gfc_new || sym->old_symbol != NULL)
3602 : return;
3603 :
3604 3113082 : s = XCNEW (gfc_symbol);
3605 3113082 : *s = *sym;
3606 3113082 : sym->old_symbol = s;
3607 3113082 : sym->gfc_new = 0;
3608 :
3609 3113082 : latest_undo_chgset->syms.safe_push (sym);
3610 : }
3611 :
3612 :
3613 : /* Given a name, find a symbol, or create it if it does not exist yet
3614 : in the current namespace. If the symbol is found we make sure that
3615 : it's OK.
3616 :
3617 : The integer return code indicates
3618 : 0 All OK
3619 : 1 The symbol name was ambiguous
3620 : 2 The name meant to be established was already host associated.
3621 :
3622 : So if the return value is nonzero, then an error was issued. */
3623 :
3624 : int
3625 5999825 : gfc_get_sym_tree (const char *name, gfc_namespace *ns, gfc_symtree **result,
3626 : bool allow_subroutine, locus *where)
3627 : {
3628 5999825 : gfc_symtree *st;
3629 5999825 : gfc_symbol *p;
3630 :
3631 : /* This doesn't usually happen during resolution. */
3632 5999825 : if (ns == NULL)
3633 2952887 : ns = gfc_current_ns;
3634 :
3635 : /* Try to find the symbol in ns. */
3636 5999825 : st = gfc_find_symtree (ns->sym_root, name);
3637 :
3638 5999825 : if (st == NULL && ns->omp_udr_ns)
3639 : {
3640 319 : ns = ns->parent;
3641 319 : st = gfc_find_symtree (ns->sym_root, name);
3642 : }
3643 :
3644 5132426 : if (st == NULL)
3645 : {
3646 : /* If not there, create a new symbol. */
3647 5132296 : p = gfc_new_symbol (name, ns, where);
3648 :
3649 : /* Add to the list of tentative symbols. */
3650 5132296 : p->old_symbol = NULL;
3651 5132296 : p->mark = 1;
3652 5132296 : p->gfc_new = 1;
3653 5132296 : latest_undo_chgset->syms.safe_push (p);
3654 :
3655 5132296 : st = gfc_new_symtree (&ns->sym_root, name);
3656 5132296 : st->n.sym = p;
3657 5132296 : p->refs++;
3658 :
3659 : }
3660 : else
3661 : {
3662 : /* Make sure the existing symbol is OK. Ambiguous
3663 : generic interfaces are permitted, as long as the
3664 : specific interfaces are different. */
3665 867529 : if (st->ambiguous && !st->n.sym->attr.generic)
3666 : {
3667 4 : ambiguous_symbol (name, st);
3668 4 : return 1;
3669 : }
3670 :
3671 867525 : p = st->n.sym;
3672 867525 : if (p->ns != ns && (!p->attr.function || ns->proc_name != p)
3673 10346 : && !(allow_subroutine && p->attr.subroutine)
3674 10338 : && !(ns->proc_name && ns->proc_name->attr.if_source == IFSRC_IFBODY
3675 10296 : && (ns->has_import_set || p->attr.imported)))
3676 : {
3677 : /* Symbol is from another namespace. */
3678 43 : gfc_error ("Symbol %qs at %C has already been host associated",
3679 : name);
3680 43 : return 2;
3681 : }
3682 :
3683 867482 : p->mark = 1;
3684 :
3685 : /* Copy in case this symbol is changed. */
3686 867482 : gfc_save_symbol_data (p);
3687 : }
3688 :
3689 5999778 : *result = st;
3690 5999778 : return 0;
3691 : }
3692 :
3693 :
3694 : int
3695 1004889 : gfc_get_symbol (const char *name, gfc_namespace *ns, gfc_symbol **result,
3696 : locus *where)
3697 : {
3698 1004889 : gfc_symtree *st;
3699 1004889 : int i;
3700 :
3701 1004889 : i = gfc_get_sym_tree (name, ns, &st, false, where);
3702 1004889 : if (i != 0)
3703 : return i;
3704 :
3705 1004872 : if (st)
3706 1004872 : *result = st->n.sym;
3707 : else
3708 0 : *result = NULL;
3709 : return i;
3710 : }
3711 :
3712 :
3713 : /* Subroutine that searches for a symbol, creating it if it doesn't
3714 : exist, but tries to host-associate the symbol if possible. */
3715 :
3716 : int
3717 7906311 : gfc_get_ha_sym_tree (const char *name, gfc_symtree **result, locus *where)
3718 : {
3719 7906311 : gfc_symtree *st;
3720 7906311 : int i;
3721 :
3722 7906311 : i = gfc_find_sym_tree (name, gfc_current_ns, 0, &st);
3723 :
3724 7906311 : if (st != NULL)
3725 : {
3726 5180384 : gfc_save_symbol_data (st->n.sym);
3727 5180384 : *result = st;
3728 5180384 : return i;
3729 : }
3730 :
3731 2725927 : i = gfc_find_sym_tree (name, gfc_current_ns, 1, &st);
3732 2725927 : if (i)
3733 : return i;
3734 :
3735 2725927 : if (st != NULL)
3736 : {
3737 271116 : *result = st;
3738 271116 : return 0;
3739 : }
3740 :
3741 2454811 : return gfc_get_sym_tree (name, gfc_current_ns, result, false, where);
3742 : }
3743 :
3744 :
3745 : int
3746 32279 : gfc_get_ha_symbol (const char *name, gfc_symbol **result, locus *where)
3747 : {
3748 32279 : int i;
3749 32279 : gfc_symtree *st = NULL;
3750 :
3751 32279 : i = gfc_get_ha_sym_tree (name, &st, where);
3752 :
3753 32279 : if (st)
3754 32279 : *result = st->n.sym;
3755 : else
3756 0 : *result = NULL;
3757 :
3758 32279 : return i;
3759 : }
3760 :
3761 :
3762 : /* Search for the symtree belonging to a gfc_common_head; we cannot use
3763 : head->name as the common_root symtree's name might be mangled. */
3764 :
3765 : static gfc_symtree *
3766 18 : find_common_symtree (gfc_symtree *st, gfc_common_head *head)
3767 : {
3768 :
3769 21 : gfc_symtree *result;
3770 :
3771 21 : if (st == NULL)
3772 : return NULL;
3773 :
3774 15 : if (st->n.common == head)
3775 : return st;
3776 :
3777 3 : result = find_common_symtree (st->left, head);
3778 3 : if (!result)
3779 3 : result = find_common_symtree (st->right, head);
3780 :
3781 : return result;
3782 : }
3783 :
3784 :
3785 : /* Restore previous state of symbol. Just copy simple stuff. */
3786 :
3787 : static void
3788 1437105 : restore_old_symbol (gfc_symbol *p)
3789 : {
3790 1437105 : gfc_symbol *old;
3791 :
3792 1437105 : p->mark = 0;
3793 1437105 : old = p->old_symbol;
3794 :
3795 1437105 : p->ts.type = old->ts.type;
3796 1437105 : p->ts.kind = old->ts.kind;
3797 :
3798 1437105 : p->attr = old->attr;
3799 :
3800 1437105 : if (p->value != old->value)
3801 : {
3802 1 : gcc_checking_assert (old->value == NULL);
3803 1 : gfc_free_expr (p->value);
3804 1 : p->value = NULL;
3805 : }
3806 :
3807 1437105 : if (p->as != old->as)
3808 : {
3809 7 : if (p->as)
3810 7 : gfc_free_array_spec (p->as);
3811 7 : p->as = old->as;
3812 : }
3813 :
3814 1437105 : p->generic = old->generic;
3815 1437105 : p->component_access = old->component_access;
3816 :
3817 1437105 : if (p->namelist != NULL && old->namelist == NULL)
3818 : {
3819 0 : gfc_free_namelist (p->namelist);
3820 0 : p->namelist = NULL;
3821 : }
3822 : else
3823 : {
3824 1437105 : if (p->namelist_tail != old->namelist_tail)
3825 : {
3826 1 : gfc_free_namelist (old->namelist_tail->next);
3827 1 : old->namelist_tail->next = NULL;
3828 : }
3829 : }
3830 :
3831 1437105 : p->namelist_tail = old->namelist_tail;
3832 :
3833 1437105 : if (p->formal != old->formal)
3834 : {
3835 28 : gfc_free_formal_arglist (p->formal);
3836 28 : p->formal = old->formal;
3837 : }
3838 :
3839 1437105 : set_symbol_common_block (p, old->common_block);
3840 1437105 : p->common_head = old->common_head;
3841 :
3842 1437105 : p->old_symbol = old->old_symbol;
3843 1437105 : free (old);
3844 1437105 : }
3845 :
3846 :
3847 : /* Frees the internal data of a gfc_undo_change_set structure. Doesn't free
3848 : the structure itself. */
3849 :
3850 : static void
3851 80368 : free_undo_change_set_data (gfc_undo_change_set &cs)
3852 : {
3853 0 : cs.syms.release ();
3854 80368 : cs.tbps.release ();
3855 0 : }
3856 :
3857 :
3858 : /* Given a change set pointer, free its target's contents and update it with
3859 : the address of the previous change set. Note that only the contents are
3860 : freed, not the target itself (the contents' container). It is not a problem
3861 : as the latter will be a local variable usually. */
3862 :
3863 : static void
3864 0 : pop_undo_change_set (gfc_undo_change_set *&cs)
3865 : {
3866 0 : free_undo_change_set_data (*cs);
3867 0 : cs = cs->previous;
3868 0 : }
3869 :
3870 :
3871 : static void free_old_symbol (gfc_symbol *sym);
3872 :
3873 :
3874 : /* Merges the current change set into the previous one. The changes themselves
3875 : are left untouched; only one checkpoint is forgotten. */
3876 :
3877 : void
3878 0 : gfc_drop_last_undo_checkpoint (void)
3879 : {
3880 0 : gfc_symbol *s, *t;
3881 0 : unsigned i, j;
3882 :
3883 0 : FOR_EACH_VEC_ELT (latest_undo_chgset->syms, i, s)
3884 : {
3885 : /* No need to loop in this case. */
3886 0 : if (s->old_symbol == NULL)
3887 0 : continue;
3888 :
3889 : /* Remove the duplicate symbols. */
3890 0 : FOR_EACH_VEC_ELT (latest_undo_chgset->previous->syms, j, t)
3891 0 : if (t == s)
3892 : {
3893 0 : latest_undo_chgset->previous->syms.unordered_remove (j);
3894 :
3895 : /* S->OLD_SYMBOL is the backup symbol for S as it was at the
3896 : last checkpoint. We drop that checkpoint, so S->OLD_SYMBOL
3897 : shall contain from now on the backup symbol for S as it was
3898 : at the checkpoint before. */
3899 0 : if (s->old_symbol->gfc_new)
3900 : {
3901 0 : gcc_assert (s->old_symbol->old_symbol == NULL);
3902 0 : s->gfc_new = s->old_symbol->gfc_new;
3903 0 : free_old_symbol (s);
3904 : }
3905 : else
3906 0 : restore_old_symbol (s->old_symbol);
3907 : break;
3908 : }
3909 : }
3910 :
3911 0 : latest_undo_chgset->previous->syms.safe_splice (latest_undo_chgset->syms);
3912 0 : latest_undo_chgset->previous->tbps.safe_splice (latest_undo_chgset->tbps);
3913 :
3914 0 : pop_undo_change_set (latest_undo_chgset);
3915 0 : }
3916 :
3917 :
3918 : /* Remove the reference to the symbol SYM in the symbol tree held by NS
3919 : and free SYM if the last reference to it has been removed.
3920 : Returns whether the symbol has been freed. */
3921 :
3922 : static bool
3923 4133071 : delete_symbol_from_ns (gfc_symbol *sym, gfc_namespace *ns)
3924 : {
3925 4133071 : if (ns == nullptr)
3926 : return false;
3927 :
3928 : /* The derived type is saved in the symtree with the first
3929 : letter capitalized; the all lower-case version to the
3930 : derived type contains its associated generic function. */
3931 4133033 : const char *sym_name = gfc_fl_struct (sym->attr.flavor)
3932 43 : ? gfc_dt_upper_string (sym->name)
3933 4133033 : : sym->name;
3934 :
3935 4133033 : gfc_delete_symtree (&ns->sym_root, sym_name);
3936 :
3937 4133033 : return gfc_release_symbol (sym);
3938 : }
3939 :
3940 :
3941 : /* Undoes all the changes made to symbols since the previous checkpoint.
3942 : This subroutine is made simpler due to the fact that attributes are
3943 : never removed once added. */
3944 :
3945 : void
3946 13050960 : gfc_restore_last_undo_checkpoint (void)
3947 : {
3948 13050960 : gfc_symbol *p;
3949 13050960 : unsigned i;
3950 :
3951 31641845 : FOR_EACH_VEC_ELT_REVERSE (latest_undo_chgset->syms, i, p)
3952 : {
3953 : /* Symbol in a common block was new. Or was old and just put in common */
3954 5570110 : if (p->common_block
3955 3735 : && (p->gfc_new || !p->old_symbol->common_block))
3956 : {
3957 : /* If the symbol was added to any common block, it
3958 : needs to be removed to stop the resolver looking
3959 : for a (possibly) dead symbol. */
3960 81 : if (p->common_block->head == p && !p->common_next)
3961 : {
3962 15 : gfc_symtree st, *st0;
3963 15 : st0 = find_common_symtree (p->ns->common_root,
3964 : p->common_block);
3965 15 : if (st0)
3966 : {
3967 12 : st.name = st0->name;
3968 12 : gfc_delete_bbt (&p->ns->common_root, &st, compare_symtree);
3969 12 : free (st0);
3970 : }
3971 : }
3972 :
3973 81 : if (p->common_block->head == p)
3974 15 : p->common_block->head = p->common_next;
3975 : else
3976 : {
3977 66 : gfc_symbol *cparent, *csym;
3978 :
3979 66 : cparent = p->common_block->head;
3980 66 : csym = cparent->common_next;
3981 :
3982 290 : while (csym != p)
3983 : {
3984 224 : cparent = csym;
3985 224 : csym = csym->common_next;
3986 : }
3987 :
3988 66 : gcc_assert(cparent->common_next == p);
3989 66 : cparent->common_next = csym->common_next;
3990 : }
3991 81 : p->common_next = NULL;
3992 : }
3993 5570110 : if (p->gfc_new)
3994 : {
3995 4133005 : bool freed = delete_symbol_from_ns (p, p->ns);
3996 :
3997 : /* If the symbol is a procedure (function or subroutine), remove
3998 : it from the procedure body namespace as well as from the outer
3999 : namespace. */
4000 4133005 : if (!freed
4001 38 : && p->formal_ns != p->ns)
4002 38 : freed = delete_symbol_from_ns (p, p->formal_ns);
4003 :
4004 : /* If the formal_ns field has not been set yet, the previous
4005 : conditional does nothing. In that case, we can assume that
4006 : gfc_current_ns is the procedure body namespace, and remove the
4007 : symbol from there. */
4008 38 : if (!freed
4009 38 : && gfc_current_ns != p->ns
4010 28 : && gfc_current_ns != p->formal_ns)
4011 28 : freed = delete_symbol_from_ns (p, gfc_current_ns);
4012 : }
4013 : else
4014 1437105 : restore_old_symbol (p);
4015 : }
4016 :
4017 13050960 : latest_undo_chgset->syms.truncate (0);
4018 13050960 : latest_undo_chgset->tbps.truncate (0);
4019 :
4020 13050960 : if (!single_undo_checkpoint_p ())
4021 0 : pop_undo_change_set (latest_undo_chgset);
4022 13050960 : }
4023 :
4024 :
4025 : /* Makes sure that there is only one set of changes; in other words we haven't
4026 : forgotten to pair a call to gfc_new_checkpoint with a call to either
4027 : gfc_drop_last_undo_checkpoint or gfc_restore_last_undo_checkpoint. */
4028 :
4029 : static void
4030 21536509 : enforce_single_undo_checkpoint (void)
4031 : {
4032 21536509 : gcc_checking_assert (single_undo_checkpoint_p ());
4033 21536509 : }
4034 :
4035 :
4036 : /* Undoes all the changes made to symbols in the current statement. */
4037 :
4038 : void
4039 13050960 : gfc_undo_symbols (void)
4040 : {
4041 13050960 : enforce_single_undo_checkpoint ();
4042 13050960 : gfc_restore_last_undo_checkpoint ();
4043 13050960 : }
4044 :
4045 :
4046 : /* Free sym->old_symbol. sym->old_symbol is mostly a shallow copy of sym; the
4047 : components of old_symbol that might need deallocation are the "allocatables"
4048 : that are restored in gfc_undo_symbols(), with two exceptions: namelist and
4049 : namelist_tail. In case these differ between old_symbol and sym, it's just
4050 : because sym->namelist has gotten a few more items. */
4051 :
4052 : static void
4053 2756935 : free_old_symbol (gfc_symbol *sym)
4054 : {
4055 :
4056 2756935 : if (sym->old_symbol == NULL)
4057 : return;
4058 :
4059 1675976 : if (sym->old_symbol->as != NULL
4060 274076 : && sym->old_symbol->as != sym->as
4061 2 : && !(sym->ts.type == BT_CLASS
4062 2 : && sym->ts.u.derived->attr.is_class
4063 2 : && sym->old_symbol->as == CLASS_DATA (sym)->as))
4064 0 : gfc_free_array_spec (sym->old_symbol->as);
4065 :
4066 1675976 : if (sym->old_symbol->value != sym->value)
4067 7299 : gfc_free_expr (sym->old_symbol->value);
4068 :
4069 1675976 : if (sym->old_symbol->formal != sym->formal)
4070 16837 : gfc_free_formal_arglist (sym->old_symbol->formal);
4071 :
4072 1675976 : free (sym->old_symbol);
4073 1675976 : sym->old_symbol = NULL;
4074 : }
4075 :
4076 :
4077 : /* Makes the changes made in the current statement permanent-- gets
4078 : rid of undo information. */
4079 :
4080 : void
4081 1559518 : gfc_commit_symbols (void)
4082 : {
4083 1559518 : gfc_symbol *p;
4084 1559518 : gfc_typebound_proc *tbp;
4085 1559518 : unsigned i;
4086 :
4087 1559518 : enforce_single_undo_checkpoint ();
4088 :
4089 5242447 : FOR_EACH_VEC_ELT (latest_undo_chgset->syms, i, p)
4090 : {
4091 2123411 : p->mark = 0;
4092 2123411 : p->gfc_new = 0;
4093 2123411 : free_old_symbol (p);
4094 : }
4095 1559518 : latest_undo_chgset->syms.truncate (0);
4096 :
4097 3177422 : FOR_EACH_VEC_ELT (latest_undo_chgset->tbps, i, tbp)
4098 58386 : tbp->error = 0;
4099 1559518 : latest_undo_chgset->tbps.truncate (0);
4100 1559518 : }
4101 :
4102 :
4103 : /* Makes the changes made in one symbol permanent -- gets rid of undo
4104 : information. */
4105 :
4106 : void
4107 633524 : gfc_commit_symbol (gfc_symbol *sym)
4108 : {
4109 633524 : gfc_symbol *p;
4110 633524 : unsigned i;
4111 :
4112 633524 : enforce_single_undo_checkpoint ();
4113 :
4114 2267459 : FOR_EACH_VEC_ELT (latest_undo_chgset->syms, i, p)
4115 1550826 : if (p == sym)
4116 : {
4117 550415 : latest_undo_chgset->syms.unordered_remove (i);
4118 550415 : break;
4119 : }
4120 :
4121 633524 : sym->mark = 0;
4122 633524 : sym->gfc_new = 0;
4123 :
4124 633524 : free_old_symbol (sym);
4125 633524 : }
4126 :
4127 :
4128 : /* Recursively free trees containing type-bound procedures. */
4129 :
4130 : static void
4131 1045606 : free_tb_tree (gfc_symtree *t)
4132 : {
4133 1045606 : if (t == NULL)
4134 : return;
4135 :
4136 7039 : free_tb_tree (t->left);
4137 7039 : free_tb_tree (t->right);
4138 :
4139 : /* TODO: Free type-bound procedure u.generic */
4140 7039 : free (t->n.tb);
4141 7039 : t->n.tb = NULL;
4142 7039 : free (t);
4143 : }
4144 :
4145 :
4146 : /* Recursive function that deletes an entire tree and all the common
4147 : head structures it points to. */
4148 :
4149 : static void
4150 519720 : free_common_tree (gfc_symtree * common_tree)
4151 : {
4152 519720 : if (common_tree == NULL)
4153 : return;
4154 :
4155 1978 : free_common_tree (common_tree->left);
4156 1978 : free_common_tree (common_tree->right);
4157 :
4158 1978 : free (common_tree);
4159 : }
4160 :
4161 :
4162 : /* Recursive function that deletes an entire tree and all the common
4163 : head structures it points to. */
4164 :
4165 : static void
4166 516772 : free_omp_udr_tree (gfc_symtree * omp_udr_tree)
4167 : {
4168 516772 : if (omp_udr_tree == NULL)
4169 : return;
4170 :
4171 504 : free_omp_udr_tree (omp_udr_tree->left);
4172 504 : free_omp_udr_tree (omp_udr_tree->right);
4173 :
4174 504 : gfc_free_omp_udr (omp_udr_tree->n.omp_udr);
4175 504 : free (omp_udr_tree);
4176 : }
4177 :
4178 :
4179 : /* Recursive function that deletes an entire tree and all the user
4180 : operator nodes that it contains. */
4181 :
4182 : static void
4183 516524 : free_uop_tree (gfc_symtree *uop_tree)
4184 : {
4185 516524 : if (uop_tree == NULL)
4186 : return;
4187 :
4188 380 : free_uop_tree (uop_tree->left);
4189 380 : free_uop_tree (uop_tree->right);
4190 :
4191 380 : gfc_free_interface (uop_tree->n.uop->op);
4192 380 : free (uop_tree->n.uop);
4193 380 : free (uop_tree);
4194 : }
4195 :
4196 :
4197 : /* Recursive function that deletes an entire tree and all the symbols
4198 : that it contains. */
4199 :
4200 : static void
4201 4584344 : free_sym_tree (gfc_symtree *sym_tree)
4202 : {
4203 4584344 : if (sym_tree == NULL)
4204 : return;
4205 :
4206 2034290 : free_sym_tree (sym_tree->left);
4207 2034290 : free_sym_tree (sym_tree->right);
4208 :
4209 2034290 : gfc_release_symbol (sym_tree->n.sym);
4210 2034290 : free (sym_tree);
4211 : }
4212 :
4213 :
4214 : /* Free the gfc_equiv_info's. */
4215 :
4216 : static void
4217 14669 : gfc_free_equiv_infos (gfc_equiv_info *s)
4218 : {
4219 14669 : if (s == NULL)
4220 : return;
4221 8115 : gfc_free_equiv_infos (s->next);
4222 8115 : free (s);
4223 : }
4224 :
4225 :
4226 : /* Free the gfc_equiv_lists. */
4227 :
4228 : static void
4229 522318 : gfc_free_equiv_lists (gfc_equiv_list *l)
4230 : {
4231 522318 : if (l == NULL)
4232 : return;
4233 6554 : gfc_free_equiv_lists (l->next);
4234 6554 : gfc_free_equiv_infos (l->equiv);
4235 6554 : free (l);
4236 : }
4237 :
4238 :
4239 : /* Free a finalizer procedure list. */
4240 :
4241 : void
4242 1058 : gfc_free_finalizer (gfc_finalizer* el)
4243 : {
4244 1058 : if (el)
4245 : {
4246 1058 : gfc_release_symbol (el->proc_sym);
4247 1058 : free (el);
4248 : }
4249 1058 : }
4250 :
4251 : static void
4252 515764 : gfc_free_finalizer_list (gfc_finalizer* list)
4253 : {
4254 516808 : while (list)
4255 : {
4256 1044 : gfc_finalizer* current = list;
4257 1044 : list = list->next;
4258 1044 : gfc_free_finalizer (current);
4259 : }
4260 515764 : }
4261 :
4262 :
4263 : /* Create a new gfc_charlen structure and add it to a namespace.
4264 : If 'old_cl' is given, the newly created charlen will be a copy of it. */
4265 :
4266 : gfc_charlen*
4267 296599 : gfc_new_charlen (gfc_namespace *ns, gfc_charlen *old_cl)
4268 : {
4269 296599 : gfc_charlen *cl;
4270 :
4271 296599 : cl = gfc_get_charlen ();
4272 :
4273 : /* Copy old_cl. */
4274 296599 : if (old_cl)
4275 : {
4276 14985 : cl->length = gfc_copy_expr (old_cl->length);
4277 14985 : cl->length_from_typespec = old_cl->length_from_typespec;
4278 14985 : cl->backend_decl = old_cl->backend_decl;
4279 14985 : cl->passed_length = old_cl->passed_length;
4280 14985 : cl->resolved = old_cl->resolved;
4281 : }
4282 :
4283 : /* Put into namespace. */
4284 296599 : cl->next = ns->cl_list;
4285 296599 : ns->cl_list = cl;
4286 :
4287 296599 : return cl;
4288 : }
4289 :
4290 :
4291 : /* Free the charlen list from cl to end (end is not freed).
4292 : Free the whole list if end is NULL. */
4293 :
4294 : static void
4295 515764 : gfc_free_charlen (gfc_charlen *cl, gfc_charlen *end)
4296 : {
4297 515764 : gfc_charlen *cl2;
4298 :
4299 812087 : for (; cl != end; cl = cl2)
4300 : {
4301 296323 : gcc_assert (cl);
4302 :
4303 296323 : cl2 = cl->next;
4304 296323 : gfc_free_expr (cl->length);
4305 296323 : free (cl);
4306 : }
4307 515764 : }
4308 :
4309 :
4310 : /* Free entry list structs. */
4311 :
4312 : static void
4313 0 : free_entry_list (gfc_entry_list *el)
4314 : {
4315 517184 : gfc_entry_list *next;
4316 :
4317 517184 : if (el == NULL)
4318 0 : return;
4319 :
4320 1420 : next = el->next;
4321 1420 : free (el);
4322 1420 : free_entry_list (next);
4323 : }
4324 :
4325 :
4326 : /* Free a namespace structure and everything below it. Interface
4327 : lists associated with intrinsic operators are not freed. These are
4328 : taken care of when a specific name is freed. */
4329 :
4330 : void
4331 12429571 : gfc_free_namespace (gfc_namespace *&ns)
4332 : {
4333 12429571 : gfc_namespace *p, *q;
4334 12429571 : int i;
4335 12429571 : gfc_was_finalized *f;
4336 :
4337 12429571 : if (ns == NULL)
4338 11913807 : return;
4339 :
4340 542160 : ns->refs--;
4341 542160 : if (ns->refs > 0)
4342 : return;
4343 :
4344 515764 : gcc_assert (ns->refs == 0);
4345 :
4346 515764 : gfc_free_statements (ns->code);
4347 :
4348 515764 : free_sym_tree (ns->sym_root);
4349 515764 : free_uop_tree (ns->uop_root);
4350 515764 : free_common_tree (ns->common_root);
4351 515764 : free_omp_udr_tree (ns->omp_udr_root);
4352 515764 : free_tb_tree (ns->tb_sym_root);
4353 515764 : free_tb_tree (ns->tb_uop_root);
4354 515764 : gfc_free_finalizer_list (ns->finalizers);
4355 515764 : gfc_free_omp_declare_simd_list (ns->omp_declare_simd);
4356 515764 : gfc_free_omp_declare_variant_list (ns->omp_declare_variant);
4357 515764 : gfc_free_charlen (ns->cl_list, NULL);
4358 515764 : free_st_labels (ns->st_labels);
4359 :
4360 515764 : free_entry_list (ns->entries);
4361 515764 : gfc_free_equiv (ns->equiv);
4362 515764 : gfc_free_equiv_lists (ns->equiv_lists);
4363 515764 : gfc_free_use_stmts (ns->use_stmts);
4364 :
4365 15472920 : for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
4366 14441392 : gfc_free_interface (ns->op[i]);
4367 :
4368 515764 : gfc_free_data (ns->data);
4369 :
4370 : /* Free all the expr + component combinations that have been
4371 : finalized. */
4372 515764 : f = ns->was_finalized;
4373 518500 : while (f)
4374 : {
4375 2736 : gfc_was_finalized* current = f;
4376 2736 : f = f->next;
4377 2736 : free (current);
4378 : }
4379 515764 : if (ns->omp_assumes)
4380 : {
4381 19 : free (ns->omp_assumes->absent);
4382 19 : free (ns->omp_assumes->contains);
4383 19 : gfc_free_expr_list (ns->omp_assumes->holds);
4384 19 : free (ns->omp_assumes);
4385 : }
4386 515764 : p = ns->contained;
4387 515764 : free (ns);
4388 515764 : ns = NULL;
4389 :
4390 : /* Recursively free any contained namespaces. */
4391 566214 : while (p != NULL)
4392 : {
4393 50450 : q = p;
4394 50450 : p = p->sibling;
4395 50450 : gfc_free_namespace (q);
4396 : }
4397 : }
4398 :
4399 :
4400 : void
4401 80034 : gfc_symbol_init_2 (void)
4402 : {
4403 :
4404 80034 : gfc_current_ns = gfc_get_namespace (NULL, 0);
4405 80034 : }
4406 :
4407 :
4408 : void
4409 80368 : gfc_symbol_done_2 (void)
4410 : {
4411 80368 : if (gfc_current_ns != NULL)
4412 : {
4413 : /* free everything from the root. */
4414 80383 : while (gfc_current_ns->parent != NULL)
4415 15 : gfc_current_ns = gfc_current_ns->parent;
4416 80368 : gfc_free_namespace (gfc_current_ns);
4417 80368 : gfc_current_ns = NULL;
4418 : }
4419 80368 : gfc_derived_types = NULL;
4420 :
4421 80368 : enforce_single_undo_checkpoint ();
4422 80368 : free_undo_change_set_data (*latest_undo_chgset);
4423 80368 : }
4424 :
4425 :
4426 : /* Count how many nodes a symtree has. */
4427 :
4428 : static unsigned
4429 25838255 : count_st_nodes (const gfc_symtree *st)
4430 : {
4431 48247743 : unsigned nodes;
4432 48247743 : if (!st)
4433 25838255 : return 0;
4434 :
4435 22409488 : nodes = count_st_nodes (st->left);
4436 22409488 : nodes++;
4437 22409488 : nodes += count_st_nodes (st->right);
4438 :
4439 22409488 : return nodes;
4440 : }
4441 :
4442 :
4443 : /* Convert symtree tree into symtree vector. */
4444 :
4445 : static unsigned
4446 25838255 : fill_st_vector (gfc_symtree *st, gfc_symtree **st_vec, unsigned node_cntr)
4447 : {
4448 48247743 : if (!st)
4449 25838255 : return node_cntr;
4450 :
4451 22409488 : node_cntr = fill_st_vector (st->left, st_vec, node_cntr);
4452 22409488 : st_vec[node_cntr++] = st;
4453 22409488 : node_cntr = fill_st_vector (st->right, st_vec, node_cntr);
4454 :
4455 22409488 : return node_cntr;
4456 : }
4457 :
4458 :
4459 : /* Traverse namespace. As the functions might modify the symtree, we store the
4460 : symtree as a vector and operate on this vector. Note: We assume that
4461 : sym_func or st_func never deletes nodes from the symtree - only adding is
4462 : allowed. Additionally, newly added nodes are not traversed. */
4463 :
4464 : static void
4465 3428767 : do_traverse_symtree (gfc_symtree *st, void (*st_func) (gfc_symtree *),
4466 : void (*sym_func) (gfc_symbol *))
4467 : {
4468 3428767 : gfc_symtree **st_vec;
4469 3428767 : unsigned nodes, i, node_cntr;
4470 :
4471 3428767 : gcc_assert ((st_func && !sym_func) || (!st_func && sym_func));
4472 3428767 : nodes = count_st_nodes (st);
4473 3428767 : st_vec = XALLOCAVEC (gfc_symtree *, nodes);
4474 3428767 : node_cntr = 0;
4475 3428767 : fill_st_vector (st, st_vec, node_cntr);
4476 :
4477 3428767 : if (sym_func)
4478 : {
4479 : /* Clear marks. */
4480 25536054 : for (i = 0; i < nodes; i++)
4481 22241372 : st_vec[i]->n.sym->mark = 0;
4482 25536054 : for (i = 0; i < nodes; i++)
4483 22241372 : if (!st_vec[i]->n.sym->mark)
4484 : {
4485 21687041 : (*sym_func) (st_vec[i]->n.sym);
4486 21687041 : st_vec[i]->n.sym->mark = 1;
4487 : }
4488 : }
4489 : else
4490 302201 : for (i = 0; i < nodes; i++)
4491 168116 : (*st_func) (st_vec[i]);
4492 3428767 : }
4493 :
4494 :
4495 : /* Recursively traverse the symtree nodes. */
4496 :
4497 : void
4498 134085 : gfc_traverse_symtree (gfc_symtree *st, void (*st_func) (gfc_symtree *))
4499 : {
4500 134085 : do_traverse_symtree (st, st_func, NULL);
4501 134085 : }
4502 :
4503 :
4504 : /* Call a given function for all symbols in the namespace. We take
4505 : care that each gfc_symbol node is called exactly once. */
4506 :
4507 : void
4508 3294682 : gfc_traverse_ns (gfc_namespace *ns, void (*sym_func) (gfc_symbol *))
4509 : {
4510 3294682 : do_traverse_symtree (ns->sym_root, NULL, sym_func);
4511 3294682 : }
4512 :
4513 :
4514 : /* Return TRUE when name is the name of an intrinsic type. */
4515 :
4516 : bool
4517 13427 : gfc_is_intrinsic_typename (const char *name)
4518 : {
4519 13427 : if (strcmp (name, "integer") == 0
4520 13424 : || strcmp (name, "real") == 0
4521 13421 : || strcmp (name, "character") == 0
4522 13419 : || strcmp (name, "logical") == 0
4523 13417 : || strcmp (name, "complex") == 0
4524 13413 : || strcmp (name, "doubleprecision") == 0
4525 13410 : || strcmp (name, "doublecomplex") == 0)
4526 : return true;
4527 : else
4528 13407 : return false;
4529 : }
4530 :
4531 :
4532 : /* Return TRUE if the symbol is an automatic variable. */
4533 :
4534 : static bool
4535 836 : gfc_is_var_automatic (gfc_symbol *sym)
4536 : {
4537 : /* Pointer and allocatable variables are never automatic. */
4538 836 : if (sym->attr.pointer || sym->attr.allocatable)
4539 : return false;
4540 : /* Check for arrays with non-constant size. */
4541 72 : if (sym->attr.dimension && sym->as
4542 829 : && !gfc_is_compile_time_shape (sym->as))
4543 : return true;
4544 : /* Check for non-constant length character variables. */
4545 747 : if (sym->ts.type == BT_CHARACTER
4546 62 : && sym->ts.u.cl
4547 809 : && !gfc_is_constant_expr (sym->ts.u.cl->length))
4548 : return true;
4549 : /* Variables with explicit AUTOMATIC attribute. */
4550 739 : if (sym->attr.automatic)
4551 : return true;
4552 :
4553 : return false;
4554 : }
4555 :
4556 : /* Given a symbol, mark it as SAVEd if it is allowed. */
4557 :
4558 : static void
4559 3023 : save_symbol (gfc_symbol *sym)
4560 : {
4561 :
4562 3023 : if (sym->attr.use_assoc)
4563 : return;
4564 :
4565 2321 : if (sym->attr.in_common
4566 2305 : || sym->attr.in_equivalence
4567 2147 : || sym->attr.dummy
4568 1908 : || sym->attr.result
4569 1897 : || sym->attr.flavor != FL_VARIABLE)
4570 : return;
4571 : /* Automatic objects are not saved. */
4572 836 : if (gfc_is_var_automatic (sym))
4573 : return;
4574 805 : gfc_add_save (&sym->attr, SAVE_EXPLICIT, sym->name, &sym->declared_at);
4575 : }
4576 :
4577 :
4578 : /* Mark those symbols which can be SAVEd as such. */
4579 :
4580 : void
4581 313 : gfc_save_all (gfc_namespace *ns)
4582 : {
4583 313 : gfc_traverse_ns (ns, save_symbol);
4584 313 : }
4585 :
4586 :
4587 : /* Make sure that no changes to symbols are pending. */
4588 :
4589 : void
4590 6212139 : gfc_enforce_clean_symbol_state(void)
4591 : {
4592 6212139 : enforce_single_undo_checkpoint ();
4593 6212139 : gcc_assert (latest_undo_chgset->syms.is_empty ());
4594 6212139 : }
4595 :
4596 :
4597 : /************** Global symbol handling ************/
4598 :
4599 :
4600 : /* Search a tree for the global symbol. */
4601 :
4602 : gfc_gsymbol *
4603 391336 : gfc_find_gsymbol (gfc_gsymbol *symbol, const char *name)
4604 : {
4605 391336 : int c;
4606 :
4607 391336 : if (symbol == NULL)
4608 : return NULL;
4609 :
4610 1321471 : while (symbol)
4611 : {
4612 1100735 : c = strcmp (name, symbol->name);
4613 1100735 : if (!c)
4614 : return symbol;
4615 :
4616 971278 : symbol = (c < 0) ? symbol->left : symbol->right;
4617 : }
4618 :
4619 : return NULL;
4620 : }
4621 :
4622 :
4623 : /* Case insensitive search a tree for the global symbol. */
4624 :
4625 : gfc_gsymbol *
4626 33668 : gfc_find_case_gsymbol (gfc_gsymbol *symbol, const char *name)
4627 : {
4628 33668 : int c;
4629 :
4630 33668 : if (symbol == NULL)
4631 : return NULL;
4632 :
4633 135050 : while (symbol)
4634 : {
4635 113084 : c = strcasecmp (name, symbol->name);
4636 113084 : if (!c)
4637 : return symbol;
4638 :
4639 101737 : symbol = (c < 0) ? symbol->left : symbol->right;
4640 : }
4641 :
4642 : return NULL;
4643 : }
4644 :
4645 :
4646 : /* Compare two global symbols. Used for managing the BB tree. */
4647 :
4648 : static int
4649 163367 : gsym_compare (void *_s1, void *_s2)
4650 : {
4651 163367 : gfc_gsymbol *s1, *s2;
4652 :
4653 163367 : s1 = (gfc_gsymbol *) _s1;
4654 163367 : s2 = (gfc_gsymbol *) _s2;
4655 163367 : return strcmp (s1->name, s2->name);
4656 : }
4657 :
4658 :
4659 : /* Get a global symbol, creating it if it doesn't exist. */
4660 :
4661 : gfc_gsymbol *
4662 112864 : gfc_get_gsymbol (const char *name, bool bind_c)
4663 : {
4664 112864 : gfc_gsymbol *s;
4665 :
4666 112864 : s = gfc_find_gsymbol (gfc_gsym_root, name);
4667 112864 : if (s != NULL)
4668 : return s;
4669 :
4670 87485 : s = XCNEW (gfc_gsymbol);
4671 87485 : s->type = GSYM_UNKNOWN;
4672 87485 : s->name = gfc_get_string ("%s", name);
4673 87485 : s->bind_c = bind_c;
4674 :
4675 87485 : gfc_insert_bbt (&gfc_gsym_root, s, gsym_compare);
4676 :
4677 87485 : return s;
4678 : }
4679 :
4680 : void
4681 0 : gfc_traverse_gsymbol (gfc_gsymbol *gsym,
4682 : void (*do_something) (gfc_gsymbol *, void *),
4683 : void *data)
4684 : {
4685 0 : if (gsym->left)
4686 0 : gfc_traverse_gsymbol (gsym->left, do_something, data);
4687 :
4688 0 : (*do_something) (gsym, data);
4689 :
4690 0 : if (gsym->right)
4691 : gfc_traverse_gsymbol (gsym->right, do_something, data);
4692 0 : }
4693 :
4694 : static gfc_symbol *
4695 52 : get_iso_c_binding_dt (int sym_id)
4696 : {
4697 52 : gfc_symbol *dt_list = gfc_derived_types;
4698 :
4699 : /* Loop through the derived types in the name list, searching for
4700 : the desired symbol from iso_c_binding. Search the parent namespaces
4701 : if necessary and requested to (parent_flag). */
4702 52 : if (dt_list)
4703 : {
4704 25 : while (dt_list->dt_next != gfc_derived_types)
4705 : {
4706 0 : if (dt_list->from_intmod != INTMOD_NONE
4707 0 : && dt_list->intmod_sym_id == sym_id)
4708 : return dt_list;
4709 :
4710 : dt_list = dt_list->dt_next;
4711 : }
4712 : }
4713 :
4714 : return NULL;
4715 : }
4716 :
4717 :
4718 : /* Verifies that the given derived type symbol, derived_sym, is interoperable
4719 : with C. This is necessary for any derived type that is BIND(C) and for
4720 : derived types that are parameters to functions that are BIND(C). All
4721 : fields of the derived type are required to be interoperable, and are tested
4722 : for such. If an error occurs, the errors are reported here, allowing for
4723 : multiple errors to be handled for a single derived type. */
4724 :
4725 : bool
4726 27001 : verify_bind_c_derived_type (gfc_symbol *derived_sym)
4727 : {
4728 27001 : gfc_component *curr_comp = NULL;
4729 27001 : bool is_c_interop = false;
4730 27001 : bool retval = true;
4731 :
4732 27001 : if (derived_sym == NULL)
4733 0 : gfc_internal_error ("verify_bind_c_derived_type(): Given symbol is "
4734 : "unexpectedly NULL");
4735 :
4736 : /* If we've already looked at this derived symbol, do not look at it again
4737 : so we don't repeat warnings/errors. */
4738 27001 : if (derived_sym->ts.is_c_interop)
4739 : return true;
4740 :
4741 : /* The derived type must have the BIND attribute to be interoperable
4742 : J3/04-007, Section 15.2.3. */
4743 406 : if (derived_sym->attr.is_bind_c != 1)
4744 : {
4745 2 : derived_sym->ts.is_c_interop = 0;
4746 2 : gfc_error_now ("Derived type %qs declared at %L must have the BIND "
4747 : "attribute to be C interoperable", derived_sym->name,
4748 : &(derived_sym->declared_at));
4749 2 : retval = false;
4750 : }
4751 :
4752 406 : curr_comp = derived_sym->components;
4753 :
4754 : /* Fortran 2003 allows an empty derived type. C99 appears to disallow an
4755 : empty struct. Section 15.2 in Fortran 2003 states: "The following
4756 : subclauses define the conditions under which a Fortran entity is
4757 : interoperable. If a Fortran entity is interoperable, an equivalent
4758 : entity may be defined by means of C and the Fortran entity is said
4759 : to be interoperable with the C entity. There does not have to be such
4760 : an interoperating C entity."
4761 :
4762 : However, later discussion on the J3 mailing list
4763 : (https://mailman.j3-fortran.org/pipermail/j3/2021-July/013190.html)
4764 : found this to be a defect, and Fortran 2018 added in section 18.3.4
4765 : the following constraint:
4766 : "C1805: A derived type with the BIND attribute shall have at least one
4767 : component."
4768 :
4769 : We thus allow empty derived types only as GNU extension while giving a
4770 : warning by default, or reject empty types in standard conformance mode.
4771 : */
4772 406 : if (curr_comp == NULL)
4773 : {
4774 2 : if (!gfc_notify_std (GFC_STD_GNU, "Derived type %qs with BIND(C) "
4775 : "attribute at %L has no components",
4776 : derived_sym->name, &(derived_sym->declared_at)))
4777 : return false;
4778 1 : else if (!pedantic)
4779 : /* Generally emit warning, but not twice if -pedantic is given. */
4780 1 : gfc_warning (0, "Derived type %qs with BIND(C) attribute at %L "
4781 : "is empty, and may be inaccessible by the C "
4782 : "companion processor",
4783 : derived_sym->name, &(derived_sym->declared_at));
4784 1 : derived_sym->ts.is_c_interop = 1;
4785 1 : derived_sym->attr.is_bind_c = 1;
4786 1 : return true;
4787 : }
4788 :
4789 :
4790 : /* Initialize the derived type as being C interoperable.
4791 : If we find an error in the components, this will be set false. */
4792 404 : derived_sym->ts.is_c_interop = 1;
4793 :
4794 : /* Loop through the list of components to verify that the kind of
4795 : each is a C interoperable type. */
4796 853 : do
4797 : {
4798 : /* The components cannot be pointers (fortran sense).
4799 : J3/04-007, Section 15.2.3, C1505. */
4800 853 : if (curr_comp->attr.pointer != 0)
4801 : {
4802 3 : gfc_error ("Component %qs at %L cannot have the "
4803 : "POINTER attribute because it is a member "
4804 : "of the BIND(C) derived type %qs at %L",
4805 : curr_comp->name, &(curr_comp->loc),
4806 : derived_sym->name, &(derived_sym->declared_at));
4807 3 : retval = false;
4808 : }
4809 :
4810 853 : if (curr_comp->attr.proc_pointer != 0)
4811 : {
4812 1 : gfc_error ("Procedure pointer component %qs at %L cannot be a member"
4813 : " of the BIND(C) derived type %qs at %L", curr_comp->name,
4814 : &curr_comp->loc, derived_sym->name,
4815 : &derived_sym->declared_at);
4816 1 : retval = false;
4817 : }
4818 :
4819 : /* The components cannot be allocatable.
4820 : J3/04-007, Section 15.2.3, C1505. */
4821 853 : if (curr_comp->attr.allocatable != 0)
4822 : {
4823 3 : gfc_error ("Component %qs at %L cannot have the "
4824 : "ALLOCATABLE attribute because it is a member "
4825 : "of the BIND(C) derived type %qs at %L",
4826 : curr_comp->name, &(curr_comp->loc),
4827 : derived_sym->name, &(derived_sym->declared_at));
4828 3 : retval = false;
4829 : }
4830 :
4831 : /* BIND(C) derived types must have interoperable components. */
4832 853 : if (curr_comp->ts.type == BT_DERIVED
4833 71 : && curr_comp->ts.u.derived->ts.is_iso_c != 1
4834 17 : && curr_comp->ts.u.derived != derived_sym)
4835 : {
4836 : /* This should be allowed; the draft says a derived-type cannot
4837 : have type parameters if it is has the BIND attribute. Type
4838 : parameters seem to be for making parameterized derived types.
4839 : There's no need to verify the type if it is c_ptr/c_funptr. */
4840 16 : retval = verify_bind_c_derived_type (curr_comp->ts.u.derived);
4841 : }
4842 : else
4843 : {
4844 : /* Grab the typespec for the given component and test the kind. */
4845 837 : is_c_interop = gfc_verify_c_interop (&(curr_comp->ts));
4846 :
4847 837 : if (!is_c_interop)
4848 : {
4849 : /* Report warning and continue since not fatal. The
4850 : draft does specify a constraint that requires all fields
4851 : to interoperate, but if the user says real(4), etc., it
4852 : may interoperate with *something* in C, but the compiler
4853 : most likely won't know exactly what. Further, it may not
4854 : interoperate with the same data type(s) in C if the user
4855 : recompiles with different flags (e.g., -m32 and -m64 on
4856 : x86_64 and using integer(4) to claim interop with a
4857 : C_LONG). */
4858 34 : if (derived_sym->attr.is_bind_c == 1 && warn_c_binding_type)
4859 : /* If the derived type is bind(c), all fields must be
4860 : interop. */
4861 1 : gfc_warning (OPT_Wc_binding_type,
4862 : "Component %qs in derived type %qs at %L "
4863 : "may not be C interoperable, even though "
4864 : "derived type %qs is BIND(C)",
4865 : curr_comp->name, derived_sym->name,
4866 : &(curr_comp->loc), derived_sym->name);
4867 33 : else if (warn_c_binding_type)
4868 : /* If derived type is param to bind(c) routine, or to one
4869 : of the iso_c_binding procs, it must be interoperable, so
4870 : all fields must interop too. */
4871 0 : gfc_warning (OPT_Wc_binding_type,
4872 : "Component %qs in derived type %qs at %L "
4873 : "may not be C interoperable",
4874 : curr_comp->name, derived_sym->name,
4875 : &(curr_comp->loc));
4876 : }
4877 : }
4878 :
4879 853 : curr_comp = curr_comp->next;
4880 853 : } while (curr_comp != NULL);
4881 :
4882 404 : if (derived_sym->attr.sequence != 0)
4883 : {
4884 0 : gfc_error ("Derived type %qs at %L cannot have the SEQUENCE "
4885 : "attribute because it is BIND(C)", derived_sym->name,
4886 : &(derived_sym->declared_at));
4887 0 : retval = false;
4888 : }
4889 :
4890 : /* Mark the derived type as not being C interoperable if we found an
4891 : error. If there were only warnings, proceed with the assumption
4892 : it's interoperable. */
4893 404 : if (!retval)
4894 8 : derived_sym->ts.is_c_interop = 0;
4895 :
4896 : return retval;
4897 : }
4898 :
4899 :
4900 : /* Generate symbols for the named constants c_null_ptr and c_null_funptr. */
4901 :
4902 : static bool
4903 6346 : gen_special_c_interop_ptr (gfc_symbol *tmp_sym, gfc_symtree *dt_symtree)
4904 : {
4905 6346 : gfc_constructor *c;
4906 :
4907 6346 : gcc_assert (tmp_sym && dt_symtree && dt_symtree->n.sym);
4908 6346 : dt_symtree->n.sym->attr.referenced = 1;
4909 :
4910 6346 : tmp_sym->attr.is_c_interop = 1;
4911 6346 : tmp_sym->attr.is_bind_c = 1;
4912 6346 : tmp_sym->ts.is_c_interop = 1;
4913 6346 : tmp_sym->ts.is_iso_c = 1;
4914 6346 : tmp_sym->ts.type = BT_DERIVED;
4915 6346 : tmp_sym->ts.f90_type = BT_VOID;
4916 6346 : tmp_sym->attr.flavor = FL_PARAMETER;
4917 6346 : tmp_sym->ts.u.derived = dt_symtree->n.sym;
4918 :
4919 : /* Set the c_address field of c_null_ptr and c_null_funptr to
4920 : the value of NULL. */
4921 6346 : tmp_sym->value = gfc_get_expr ();
4922 6346 : tmp_sym->value->expr_type = EXPR_STRUCTURE;
4923 6346 : tmp_sym->value->ts.type = BT_DERIVED;
4924 6346 : tmp_sym->value->ts.f90_type = BT_VOID;
4925 6346 : tmp_sym->value->ts.u.derived = tmp_sym->ts.u.derived;
4926 6346 : gfc_constructor_append_expr (&tmp_sym->value->value.constructor, NULL, NULL);
4927 6346 : c = gfc_constructor_first (tmp_sym->value->value.constructor);
4928 6346 : c->expr = gfc_get_int_expr (gfc_index_integer_kind, NULL, 0);
4929 6346 : c->expr->ts.is_iso_c = 1;
4930 :
4931 6346 : return true;
4932 : }
4933 :
4934 :
4935 : /* Add a formal argument, gfc_formal_arglist, to the
4936 : end of the given list of arguments. Set the reference to the
4937 : provided symbol, param_sym, in the argument. */
4938 :
4939 : static void
4940 94517 : add_formal_arg (gfc_formal_arglist **head,
4941 : gfc_formal_arglist **tail,
4942 : gfc_formal_arglist *formal_arg,
4943 : gfc_symbol *param_sym)
4944 : {
4945 : /* Put in list, either as first arg or at the tail (curr arg). */
4946 0 : if (*head == NULL)
4947 0 : *head = *tail = formal_arg;
4948 : else
4949 : {
4950 57611 : (*tail)->next = formal_arg;
4951 57611 : (*tail) = formal_arg;
4952 : }
4953 :
4954 94517 : (*tail)->sym = param_sym;
4955 94517 : (*tail)->next = NULL;
4956 :
4957 94517 : return;
4958 : }
4959 :
4960 :
4961 : /* Add a procedure interface to the given symbol (i.e., store a
4962 : reference to the list of formal arguments). */
4963 :
4964 : static void
4965 37640 : add_proc_interface (gfc_symbol *sym, ifsrc source, gfc_formal_arglist *formal)
4966 : {
4967 :
4968 37640 : sym->formal = formal;
4969 37640 : sym->attr.if_source = source;
4970 0 : }
4971 :
4972 :
4973 : /* Copy the formal args from an existing symbol, src, into a new
4974 : symbol, dest. New formal args are created, and the description of
4975 : each arg is set according to the existing ones. This function is
4976 : used when creating procedure declaration variables from a procedure
4977 : declaration statement (see match_proc_decl()) to create the formal
4978 : args based on the args of a given named interface.
4979 :
4980 : When an actual argument list is provided, skip the absent arguments
4981 : unless copy_type is true.
4982 : To be used together with gfc_se->ignore_optional. */
4983 :
4984 : void
4985 37640 : gfc_copy_formal_args_intr (gfc_symbol *dest, gfc_intrinsic_sym *src,
4986 : gfc_actual_arglist *actual, bool copy_type)
4987 : {
4988 37640 : gfc_formal_arglist *head = NULL;
4989 37640 : gfc_formal_arglist *tail = NULL;
4990 37640 : gfc_formal_arglist *formal_arg = NULL;
4991 37640 : gfc_intrinsic_arg *curr_arg = NULL;
4992 37640 : gfc_formal_arglist *formal_prev = NULL;
4993 37640 : gfc_actual_arglist *act_arg = actual;
4994 : /* Save current namespace so we can change it for formal args. */
4995 37640 : gfc_namespace *parent_ns = gfc_current_ns;
4996 :
4997 : /* Create a new namespace, which will be the formal ns (namespace
4998 : of the formal args). */
4999 37640 : gfc_current_ns = gfc_get_namespace (parent_ns, 0);
5000 37640 : gfc_current_ns->proc_name = dest;
5001 :
5002 135031 : for (curr_arg = src->formal; curr_arg; curr_arg = curr_arg->next)
5003 : {
5004 : /* Skip absent arguments. */
5005 97391 : if (actual)
5006 : {
5007 14509 : gcc_assert (act_arg != NULL);
5008 14509 : if (act_arg->expr == NULL)
5009 : {
5010 2874 : act_arg = act_arg->next;
5011 2874 : continue;
5012 : }
5013 : }
5014 94517 : formal_arg = gfc_get_formal_arglist ();
5015 94517 : gfc_get_symbol (curr_arg->name, gfc_current_ns, &(formal_arg->sym));
5016 :
5017 : /* May need to copy more info for the symbol. */
5018 94517 : if (copy_type && act_arg->expr != NULL)
5019 : {
5020 5720 : formal_arg->sym->ts = act_arg->expr->ts;
5021 5720 : if (act_arg->expr->rank > 0)
5022 : {
5023 2575 : formal_arg->sym->attr.dimension = 1;
5024 2575 : formal_arg->sym->as = gfc_get_array_spec();
5025 2575 : formal_arg->sym->as->rank = -1;
5026 2575 : formal_arg->sym->as->type = AS_ASSUMED_RANK;
5027 : }
5028 5720 : if (act_arg->name && strcmp (act_arg->name, "%VAL") == 0)
5029 1300 : formal_arg->sym->pass_as_value = 1;
5030 : }
5031 : else
5032 88797 : formal_arg->sym->ts = curr_arg->ts;
5033 :
5034 94517 : formal_arg->sym->attr.optional = curr_arg->optional;
5035 94517 : formal_arg->sym->attr.value = curr_arg->value;
5036 94517 : formal_arg->sym->attr.intent = curr_arg->intent;
5037 94517 : formal_arg->sym->attr.flavor = FL_VARIABLE;
5038 94517 : formal_arg->sym->attr.dummy = 1;
5039 :
5040 : /* Do not treat an actual deferred-length character argument wrongly
5041 : as template for the formal argument. */
5042 94517 : if (formal_arg->sym->ts.type == BT_CHARACTER
5043 7901 : && !(formal_arg->sym->attr.allocatable
5044 7901 : || formal_arg->sym->attr.pointer))
5045 7901 : formal_arg->sym->ts.deferred = false;
5046 :
5047 94517 : if (formal_arg->sym->ts.type == BT_CHARACTER)
5048 7901 : formal_arg->sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
5049 :
5050 : /* If this isn't the first arg, set up the next ptr. For the
5051 : last arg built, the formal_arg->next will never get set to
5052 : anything other than NULL. */
5053 94517 : if (formal_prev != NULL)
5054 57611 : formal_prev->next = formal_arg;
5055 : else
5056 : formal_arg->next = NULL;
5057 :
5058 94517 : formal_prev = formal_arg;
5059 :
5060 : /* Add arg to list of formal args. */
5061 94517 : add_formal_arg (&head, &tail, formal_arg, formal_arg->sym);
5062 :
5063 : /* Validate changes. */
5064 94517 : gfc_commit_symbol (formal_arg->sym);
5065 94517 : if (actual)
5066 11635 : act_arg = act_arg->next;
5067 : }
5068 :
5069 : /* Add the interface to the symbol. */
5070 37640 : add_proc_interface (dest, IFSRC_DECL, head);
5071 :
5072 : /* Store the formal namespace information. */
5073 37640 : if (dest->formal != NULL)
5074 : /* The current ns should be that for the dest proc. */
5075 36906 : dest->formal_ns = gfc_current_ns;
5076 : else
5077 734 : gfc_free_namespace (gfc_current_ns);
5078 : /* Restore the current namespace to what it was on entry. */
5079 37640 : gfc_current_ns = parent_ns;
5080 37640 : }
5081 :
5082 :
5083 : static int
5084 153727 : std_for_isocbinding_symbol (int id)
5085 : {
5086 153727 : switch (id)
5087 : {
5088 : #define NAMED_INTCST(a,b,c,d) \
5089 : case a:\
5090 : return d;
5091 : #include "iso-c-binding.def"
5092 : #undef NAMED_INTCST
5093 :
5094 : #define NAMED_UINTCST(a,b,c,d) \
5095 : case a:\
5096 : return d;
5097 : #include "iso-c-binding.def"
5098 : #undef NAMED_UINTCST
5099 :
5100 : #define NAMED_FUNCTION(a,b,c,d) \
5101 : case a:\
5102 : return d;
5103 : #define NAMED_SUBROUTINE(a,b,c,d) \
5104 : case a:\
5105 : return d;
5106 : #include "iso-c-binding.def"
5107 : #undef NAMED_FUNCTION
5108 : #undef NAMED_SUBROUTINE
5109 :
5110 : default:
5111 : return GFC_STD_F2003;
5112 : }
5113 : }
5114 :
5115 : /* Generate the given set of C interoperable kind objects, or all
5116 : interoperable kinds. This function will only be given kind objects
5117 : for valid iso_c_binding defined types because this is verified when
5118 : the 'use' statement is parsed. If the user gives an 'only' clause,
5119 : the specific kinds are looked up; if they don't exist, an error is
5120 : reported. If the user does not give an 'only' clause, all
5121 : iso_c_binding symbols are generated. If a list of specific kinds
5122 : is given, it must have a NULL in the first empty spot to mark the
5123 : end of the list. For C_null_(fun)ptr, dt_symtree has to be set and
5124 : point to the symtree for c_(fun)ptr. */
5125 :
5126 : gfc_symtree *
5127 153727 : generate_isocbinding_symbol (const char *mod_name, iso_c_binding_symbol s,
5128 : const char *local_name, gfc_symtree *dt_symtree,
5129 : bool hidden)
5130 : {
5131 153727 : const char *const name = (local_name && local_name[0])
5132 153727 : ? local_name : c_interop_kinds_table[s].name;
5133 153727 : gfc_symtree *tmp_symtree;
5134 153727 : gfc_symbol *tmp_sym = NULL;
5135 153727 : int index;
5136 :
5137 153727 : if (gfc_notification_std (std_for_isocbinding_symbol (s)) == ERROR)
5138 : return NULL;
5139 :
5140 153727 : tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root, name);
5141 153727 : if (hidden
5142 48 : && (!tmp_symtree || !tmp_symtree->n.sym
5143 14 : || tmp_symtree->n.sym->from_intmod != INTMOD_ISO_C_BINDING
5144 14 : || tmp_symtree->n.sym->intmod_sym_id != s))
5145 34 : tmp_symtree = NULL;
5146 :
5147 : /* Already exists in this scope so don't re-add it. */
5148 318 : if (tmp_symtree != NULL && (tmp_sym = tmp_symtree->n.sym) != NULL
5149 318 : && (!tmp_sym->attr.generic
5150 52 : || (tmp_sym = gfc_find_dt_in_generic (tmp_sym)) != NULL)
5151 154045 : && tmp_sym->from_intmod == INTMOD_ISO_C_BINDING)
5152 : {
5153 318 : if (tmp_sym->attr.flavor == FL_DERIVED
5154 318 : && !get_iso_c_binding_dt (tmp_sym->intmod_sym_id))
5155 : {
5156 52 : if (gfc_derived_types)
5157 : {
5158 25 : tmp_sym->dt_next = gfc_derived_types->dt_next;
5159 25 : gfc_derived_types->dt_next = tmp_sym;
5160 : }
5161 : else
5162 : {
5163 27 : tmp_sym->dt_next = tmp_sym;
5164 : }
5165 52 : gfc_derived_types = tmp_sym;
5166 : }
5167 :
5168 318 : return tmp_symtree;
5169 : }
5170 :
5171 : /* Create the sym tree in the current ns. */
5172 153409 : if (hidden)
5173 : {
5174 34 : tmp_symtree = gfc_get_unique_symtree (gfc_current_ns);
5175 34 : tmp_sym = gfc_new_symbol (name, gfc_current_ns);
5176 :
5177 : /* Add to the list of tentative symbols. */
5178 34 : latest_undo_chgset->syms.safe_push (tmp_sym);
5179 34 : tmp_sym->old_symbol = NULL;
5180 34 : tmp_sym->mark = 1;
5181 34 : tmp_sym->gfc_new = 1;
5182 :
5183 34 : tmp_symtree->n.sym = tmp_sym;
5184 34 : tmp_sym->refs++;
5185 : }
5186 : else
5187 : {
5188 153375 : gfc_get_sym_tree (name, gfc_current_ns, &tmp_symtree, false);
5189 153375 : gcc_assert (tmp_symtree);
5190 153375 : tmp_sym = tmp_symtree->n.sym;
5191 : }
5192 :
5193 : /* Say what module this symbol belongs to. */
5194 153409 : tmp_sym->module = gfc_get_string ("%s", mod_name);
5195 153409 : tmp_sym->from_intmod = INTMOD_ISO_C_BINDING;
5196 153409 : tmp_sym->intmod_sym_id = s;
5197 153409 : tmp_sym->attr.is_iso_c = 1;
5198 153409 : tmp_sym->attr.use_assoc = 1;
5199 :
5200 153409 : gcc_assert (dt_symtree == NULL || s == ISOCBINDING_NULL_FUNPTR
5201 : || s == ISOCBINDING_NULL_PTR);
5202 :
5203 150210 : switch (s)
5204 : {
5205 :
5206 : #define NAMED_INTCST(a,b,c,d) case a :
5207 : #define NAMED_UINTCST(a,b,c,d) case a :
5208 : #define NAMED_REALCST(a,b,c,d) case a :
5209 : #define NAMED_CMPXCST(a,b,c,d) case a :
5210 : #define NAMED_LOGCST(a,b,c) case a :
5211 : #define NAMED_CHARKNDCST(a,b,c) case a :
5212 : #include "iso-c-binding.def"
5213 :
5214 226632 : tmp_sym->value = gfc_get_int_expr (gfc_default_integer_kind, NULL,
5215 113316 : c_interop_kinds_table[s].value);
5216 :
5217 : /* Initialize an integer constant expression node. */
5218 113316 : tmp_sym->attr.flavor = FL_PARAMETER;
5219 113316 : tmp_sym->ts.type = BT_INTEGER;
5220 113316 : tmp_sym->ts.kind = gfc_default_integer_kind;
5221 :
5222 : /* Mark this type as a C interoperable one. */
5223 113316 : tmp_sym->ts.is_c_interop = 1;
5224 113316 : tmp_sym->ts.is_iso_c = 1;
5225 113316 : tmp_sym->value->ts.is_c_interop = 1;
5226 113316 : tmp_sym->value->ts.is_iso_c = 1;
5227 113316 : tmp_sym->attr.is_c_interop = 1;
5228 :
5229 : /* Tell what f90 type this c interop kind is valid. */
5230 113316 : tmp_sym->ts.f90_type = c_interop_kinds_table[s].f90_type;
5231 :
5232 113316 : break;
5233 :
5234 :
5235 : #define NAMED_CHARCST(a,b,c) case a :
5236 : #include "iso-c-binding.def"
5237 :
5238 : /* Initialize an integer constant expression node for the
5239 : length of the character. */
5240 25140 : tmp_sym->value = gfc_get_character_expr (gfc_default_character_kind,
5241 : &gfc_current_locus, NULL, 1);
5242 25140 : tmp_sym->value->ts.is_c_interop = 1;
5243 25140 : tmp_sym->value->ts.is_iso_c = 1;
5244 25140 : tmp_sym->value->value.character.length = 1;
5245 25140 : tmp_sym->value->value.character.string[0]
5246 25140 : = (gfc_char_t) c_interop_kinds_table[s].value;
5247 25140 : tmp_sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL);
5248 25140 : tmp_sym->ts.u.cl->length = gfc_get_int_expr (gfc_charlen_int_kind,
5249 : NULL, 1);
5250 :
5251 : /* May not need this in both attr and ts, but do need in
5252 : attr for writing module file. */
5253 25140 : tmp_sym->attr.is_c_interop = 1;
5254 :
5255 25140 : tmp_sym->attr.flavor = FL_PARAMETER;
5256 25140 : tmp_sym->ts.type = BT_CHARACTER;
5257 :
5258 : /* Need to set it to the C_CHAR kind. */
5259 25140 : tmp_sym->ts.kind = gfc_default_character_kind;
5260 :
5261 : /* Mark this type as a C interoperable one. */
5262 25140 : tmp_sym->ts.is_c_interop = 1;
5263 25140 : tmp_sym->ts.is_iso_c = 1;
5264 :
5265 : /* Tell what f90 type this c interop kind is valid. */
5266 25140 : tmp_sym->ts.f90_type = BT_CHARACTER;
5267 :
5268 25140 : break;
5269 :
5270 8607 : case ISOCBINDING_PTR:
5271 8607 : case ISOCBINDING_FUNPTR:
5272 8607 : {
5273 8607 : gfc_symbol *dt_sym;
5274 8607 : gfc_component *tmp_comp = NULL;
5275 :
5276 : /* Generate real derived type. */
5277 8607 : if (hidden)
5278 : dt_sym = tmp_sym;
5279 : else
5280 : {
5281 8573 : const char *hidden_name;
5282 8573 : gfc_interface *intr, *head;
5283 :
5284 8573 : hidden_name = gfc_dt_upper_string (tmp_sym->name);
5285 8573 : tmp_symtree = gfc_find_symtree (gfc_current_ns->sym_root,
5286 : hidden_name);
5287 8573 : gcc_assert (tmp_symtree == NULL);
5288 8573 : gfc_get_sym_tree (hidden_name, gfc_current_ns, &tmp_symtree, false);
5289 8573 : dt_sym = tmp_symtree->n.sym;
5290 11811 : dt_sym->name = gfc_get_string (s == ISOCBINDING_PTR
5291 : ? "c_ptr" : "c_funptr");
5292 :
5293 : /* Generate an artificial generic function. */
5294 8573 : head = tmp_sym->generic;
5295 8573 : intr = gfc_get_interface ();
5296 8573 : intr->sym = dt_sym;
5297 8573 : intr->where = gfc_current_locus;
5298 8573 : intr->next = head;
5299 8573 : tmp_sym->generic = intr;
5300 :
5301 8573 : if (!tmp_sym->attr.generic
5302 8573 : && !gfc_add_generic (&tmp_sym->attr, tmp_sym->name, NULL))
5303 0 : return NULL;
5304 :
5305 8573 : if (!tmp_sym->attr.function
5306 8573 : && !gfc_add_function (&tmp_sym->attr, tmp_sym->name, NULL))
5307 : return NULL;
5308 : }
5309 :
5310 : /* Say what module this symbol belongs to. */
5311 8607 : dt_sym->module = gfc_get_string ("%s", mod_name);
5312 8607 : dt_sym->from_intmod = INTMOD_ISO_C_BINDING;
5313 8607 : dt_sym->intmod_sym_id = s;
5314 8607 : dt_sym->attr.use_assoc = 1;
5315 :
5316 : /* Initialize an integer constant expression node. */
5317 8607 : dt_sym->attr.flavor = FL_DERIVED;
5318 8607 : dt_sym->ts.is_c_interop = 1;
5319 8607 : dt_sym->attr.is_c_interop = 1;
5320 8607 : dt_sym->attr.private_comp = 1;
5321 8607 : dt_sym->component_access = ACCESS_PRIVATE;
5322 8607 : dt_sym->ts.is_iso_c = 1;
5323 8607 : dt_sym->ts.type = BT_DERIVED;
5324 8607 : dt_sym->ts.f90_type = BT_VOID;
5325 :
5326 : /* A derived type must have the bind attribute to be
5327 : interoperable (J3/04-007, Section 15.2.3), even though
5328 : the binding label is not used. */
5329 8607 : dt_sym->attr.is_bind_c = 1;
5330 :
5331 8607 : dt_sym->attr.referenced = 1;
5332 8607 : dt_sym->ts.u.derived = dt_sym;
5333 :
5334 : /* Add the symbol created for the derived type to the current ns. */
5335 8607 : if (gfc_derived_types)
5336 : {
5337 6603 : dt_sym->dt_next = gfc_derived_types->dt_next;
5338 6603 : gfc_derived_types->dt_next = dt_sym;
5339 : }
5340 : else
5341 : {
5342 2004 : dt_sym->dt_next = dt_sym;
5343 : }
5344 8607 : gfc_derived_types = dt_sym;
5345 :
5346 8607 : gfc_add_component (dt_sym, "c_address", &tmp_comp);
5347 8607 : if (tmp_comp == NULL)
5348 0 : gcc_unreachable ();
5349 :
5350 8607 : tmp_comp->ts.type = BT_INTEGER;
5351 :
5352 : /* Set this because the module will need to read/write this field. */
5353 8607 : tmp_comp->ts.f90_type = BT_INTEGER;
5354 :
5355 : /* The kinds for c_ptr and c_funptr are the same. */
5356 8607 : index = get_c_kind ("c_ptr", c_interop_kinds_table);
5357 8607 : tmp_comp->ts.kind = c_interop_kinds_table[index].value;
5358 8607 : tmp_comp->attr.access = ACCESS_PRIVATE;
5359 :
5360 : /* Mark the component as C interoperable. */
5361 8607 : tmp_comp->ts.is_c_interop = 1;
5362 : }
5363 :
5364 8607 : break;
5365 :
5366 6346 : case ISOCBINDING_NULL_PTR:
5367 6346 : case ISOCBINDING_NULL_FUNPTR:
5368 6346 : gen_special_c_interop_ptr (tmp_sym, dt_symtree);
5369 6346 : break;
5370 :
5371 0 : default:
5372 0 : gcc_unreachable ();
5373 : }
5374 153409 : gfc_commit_symbol (tmp_sym);
5375 153409 : return tmp_symtree;
5376 : }
5377 :
5378 :
5379 : /* Check that a symbol is already typed. If strict is not set, an untyped
5380 : symbol is acceptable for non-standard-conforming mode. */
5381 :
5382 : bool
5383 14459 : gfc_check_symbol_typed (gfc_symbol* sym, gfc_namespace* ns,
5384 : bool strict, locus where)
5385 : {
5386 14459 : gcc_assert (sym);
5387 :
5388 14459 : if (gfc_matching_prefix)
5389 : return true;
5390 :
5391 : /* Check for the type and try to give it an implicit one. */
5392 14416 : if (sym->ts.type == BT_UNKNOWN
5393 14416 : && !gfc_set_default_type (sym, 0, ns))
5394 : {
5395 451 : if (strict)
5396 : {
5397 11 : gfc_error ("Symbol %qs is used before it is typed at %L",
5398 : sym->name, &where);
5399 11 : return false;
5400 : }
5401 :
5402 440 : if (!gfc_notify_std (GFC_STD_GNU, "Symbol %qs is used before"
5403 : " it is typed at %L", sym->name, &where))
5404 : return false;
5405 : }
5406 :
5407 : /* Everything is ok. */
5408 : return true;
5409 : }
5410 :
5411 :
5412 : /* Construct a typebound-procedure structure. Those are stored in a tentative
5413 : list and marked `error' until symbols are committed. */
5414 :
5415 : gfc_typebound_proc*
5416 58400 : gfc_get_typebound_proc (gfc_typebound_proc *tb0)
5417 : {
5418 58400 : gfc_typebound_proc *result;
5419 :
5420 58400 : result = XCNEW (gfc_typebound_proc);
5421 58400 : if (tb0)
5422 3130 : *result = *tb0;
5423 58400 : result->error = 1;
5424 :
5425 58400 : latest_undo_chgset->tbps.safe_push (result);
5426 :
5427 58400 : return result;
5428 : }
5429 :
5430 :
5431 : /* Get the super-type of a given derived type. */
5432 :
5433 : gfc_symbol*
5434 663894 : gfc_get_derived_super_type (gfc_symbol* derived)
5435 : {
5436 663894 : gcc_assert (derived);
5437 :
5438 663894 : if (derived->attr.generic)
5439 2 : derived = gfc_find_dt_in_generic (derived);
5440 :
5441 663894 : if (!derived->attr.extension)
5442 : return NULL;
5443 :
5444 123450 : gcc_assert (derived->components);
5445 123450 : gcc_assert (derived->components->ts.type == BT_DERIVED);
5446 123450 : gcc_assert (derived->components->ts.u.derived);
5447 :
5448 123450 : if (derived->components->ts.u.derived->attr.generic)
5449 0 : return gfc_find_dt_in_generic (derived->components->ts.u.derived);
5450 :
5451 : return derived->components->ts.u.derived;
5452 : }
5453 :
5454 :
5455 : /* Check if a derived type t2 is an extension of (or equal to) a type t1. */
5456 :
5457 : bool
5458 29704 : gfc_type_is_extension_of (gfc_symbol *t1, gfc_symbol *t2)
5459 : {
5460 33782 : while (!gfc_compare_derived_types (t1, t2) && t2->attr.extension)
5461 4078 : t2 = gfc_get_derived_super_type (t2);
5462 29704 : return gfc_compare_derived_types (t1, t2);
5463 : }
5464 :
5465 : /* Check if parameterized derived type t2 is an instance of pdt template t1
5466 :
5467 : gfc_symbol *t1 -> pdt template to verify t2 against.
5468 : gfc_symbol *t2 -> pdt instance to be verified.
5469 :
5470 : In decl.cc, gfc_get_pdt_instance, a pdt instance is given a 3 character
5471 : prefix PDT_PREFIX, followed by an underscore list of the kind parameters,
5472 : up to a maximum of 8 kind parameters. To verify if a PDT Type corresponds
5473 : to the template, this functions extracts t2's derive_type name,
5474 : and compares it to the derive_type name of t1 for compatibility.
5475 :
5476 : For example:
5477 :
5478 : t2->name = PDT_PREFIXf_2_2; extract the 'f' and compare with t1->name. */
5479 :
5480 : bool
5481 18 : gfc_pdt_is_instance_of (gfc_symbol *t1, gfc_symbol *t2)
5482 : {
5483 18 : if ( !t1->attr.pdt_template || !t2->attr.pdt_type )
5484 : return false;
5485 :
5486 : /* Limit comparison to length of t1->name to ignore new kind params. */
5487 18 : if ( !(strncmp (&(t2->name[PDT_PREFIX_LEN]), t1->name,
5488 : strlen (t1->name)) == 0) )
5489 0 : return false;
5490 :
5491 : return true;
5492 : }
5493 :
5494 : /* Check if two typespecs are type compatible (F03:5.1.1.2):
5495 : If ts1 is nonpolymorphic, ts2 must be the same type.
5496 : If ts1 is polymorphic (CLASS), ts2 must be an extension of ts1. */
5497 :
5498 : bool
5499 274386 : gfc_type_compatible (gfc_typespec *ts1, gfc_typespec *ts2)
5500 : {
5501 274386 : bool is_class1 = (ts1->type == BT_CLASS);
5502 274386 : bool is_class2 = (ts2->type == BT_CLASS);
5503 274386 : bool is_derived1 = (ts1->type == BT_DERIVED);
5504 274386 : bool is_derived2 = (ts2->type == BT_DERIVED);
5505 274386 : bool is_union1 = (ts1->type == BT_UNION);
5506 274386 : bool is_union2 = (ts2->type == BT_UNION);
5507 :
5508 : /* A boz-literal-constant has no type. */
5509 274386 : if (ts1->type == BT_BOZ || ts2->type == BT_BOZ)
5510 : return false;
5511 :
5512 274384 : if (is_class1
5513 28294 : && ts1->u.derived->components
5514 28134 : && ((ts1->u.derived->attr.is_class
5515 28127 : && ts1->u.derived->components->ts.u.derived->attr
5516 28127 : .unlimited_polymorphic)
5517 27330 : || ts1->u.derived->attr.unlimited_polymorphic))
5518 : return 1;
5519 :
5520 273580 : if (!is_derived1 && !is_derived2 && !is_class1 && !is_class2
5521 2351 : && !is_union1 && !is_union2)
5522 2351 : return (ts1->type == ts2->type);
5523 :
5524 271229 : if ((is_derived1 && is_derived2) || (is_union1 && is_union2))
5525 242726 : return gfc_compare_derived_types (ts1->u.derived, ts2->u.derived);
5526 :
5527 28503 : if (is_derived1 && is_class2)
5528 1009 : return gfc_compare_derived_types (ts1->u.derived,
5529 1009 : ts2->u.derived->attr.is_class ?
5530 1006 : ts2->u.derived->components->ts.u.derived
5531 1009 : : ts2->u.derived);
5532 27494 : if (is_class1 && is_derived2)
5533 9311 : return gfc_type_is_extension_of (ts1->u.derived->attr.is_class ?
5534 9310 : ts1->u.derived->components->ts.u.derived
5535 : : ts1->u.derived,
5536 18622 : ts2->u.derived);
5537 18183 : else if (is_class1 && is_class2)
5538 36192 : return gfc_type_is_extension_of (ts1->u.derived->attr.is_class ?
5539 18013 : ts1->u.derived->components->ts.u.derived
5540 : : ts1->u.derived,
5541 18179 : ts2->u.derived->attr.is_class ?
5542 18014 : ts2->u.derived->components->ts.u.derived
5543 18179 : : ts2->u.derived);
5544 : else
5545 : return 0;
5546 : }
5547 :
5548 :
5549 : /* Find the parent-namespace of the current function. If we're inside
5550 : BLOCK constructs, it may not be the current one. */
5551 :
5552 : gfc_namespace*
5553 63264 : gfc_find_proc_namespace (gfc_namespace* ns)
5554 : {
5555 63825 : while (ns->construct_entities)
5556 : {
5557 561 : ns = ns->parent;
5558 561 : gcc_assert (ns);
5559 : }
5560 :
5561 63264 : return ns;
5562 : }
5563 :
5564 :
5565 : /* Check if an associate-variable should be translated as an `implicit' pointer
5566 : internally (if it is associated to a variable and not an array with
5567 : descriptor). */
5568 :
5569 : bool
5570 486801 : gfc_is_associate_pointer (gfc_symbol* sym)
5571 : {
5572 486801 : if (!sym->assoc)
5573 : return false;
5574 :
5575 11902 : if (sym->ts.type == BT_CLASS)
5576 : return true;
5577 :
5578 6655 : if (sym->ts.type == BT_CHARACTER
5579 1260 : && sym->ts.deferred
5580 56 : && sym->assoc->target
5581 56 : && sym->assoc->target->expr_type == EXPR_FUNCTION)
5582 : return true;
5583 :
5584 6649 : if (!sym->assoc->variable)
5585 : return false;
5586 :
5587 5763 : if ((sym->attr.dimension || sym->attr.codimension)
5588 0 : && sym->as->type != AS_EXPLICIT)
5589 0 : return false;
5590 :
5591 : return true;
5592 : }
5593 :
5594 :
5595 : gfc_symbol *
5596 33522 : gfc_find_dt_in_generic (gfc_symbol *sym)
5597 : {
5598 33522 : gfc_interface *intr = NULL;
5599 :
5600 33522 : if (!sym || gfc_fl_struct (sym->attr.flavor))
5601 : return sym;
5602 :
5603 33522 : if (sym->attr.generic)
5604 35266 : for (intr = sym->generic; intr; intr = intr->next)
5605 22403 : if (gfc_fl_struct (intr->sym->attr.flavor))
5606 : break;
5607 33520 : return intr ? intr->sym : NULL;
5608 : }
5609 :
5610 :
5611 : /* Get the dummy arguments from a procedure symbol. If it has been declared
5612 : via a PROCEDURE statement with a named interface, ts.interface will be set
5613 : and the arguments need to be taken from there. */
5614 :
5615 : gfc_formal_arglist *
5616 3689082 : gfc_sym_get_dummy_args (gfc_symbol *sym)
5617 : {
5618 3689082 : gfc_formal_arglist *dummies;
5619 :
5620 3689082 : if (sym == NULL)
5621 : return NULL;
5622 :
5623 3689081 : dummies = sym->formal;
5624 3689081 : if (dummies == NULL && sym->ts.interface != NULL)
5625 6691 : dummies = sym->ts.interface->formal;
5626 :
5627 : return dummies;
5628 : }
5629 :
5630 :
5631 : /* Given a procedure, returns the associated namespace.
5632 : The resulting NS should match the condition NS->PROC_NAME == SYM. */
5633 :
5634 : gfc_namespace *
5635 746302 : gfc_get_procedure_ns (gfc_symbol *sym)
5636 : {
5637 746302 : if (sym->formal_ns
5638 566659 : && sym->formal_ns->proc_name == sym
5639 : /* For module procedures used in submodules, there are two namespaces.
5640 : The one generated by the host association of the module is directly
5641 : accessible through SYM->FORMAL_NS but doesn't have any parent set.
5642 : The one generated by the parser is only accessible by walking the
5643 : contained namespace but has its parent set. Prefer the one generated
5644 : by the parser below. */
5645 566239 : && !(sym->attr.used_in_submodule
5646 963 : && sym->attr.contained
5647 398 : && sym->formal_ns->parent == nullptr))
5648 : return sym->formal_ns;
5649 :
5650 : /* The above should have worked in most cases. If it hasn't, try some other
5651 : heuristics, eventually returning SYM->NS. */
5652 180459 : if (gfc_current_ns->proc_name == sym)
5653 : return gfc_current_ns;
5654 :
5655 : /* For contained procedures, the symbol's NS field is the
5656 : hosting namespace, not the procedure namespace. */
5657 155668 : if (sym->attr.flavor == FL_PROCEDURE && sym->attr.contained)
5658 177238 : for (gfc_namespace *ns = sym->ns->contained; ns; ns = ns->sibling)
5659 176886 : if (ns->proc_name == sym)
5660 : return ns;
5661 :
5662 114051 : if (sym->formal_ns
5663 420 : && sym->formal_ns->proc_name == sym)
5664 : return sym->formal_ns;
5665 :
5666 114051 : if (sym->formal)
5667 3912 : for (gfc_formal_arglist *f = sym->formal; f != nullptr; f = f->next)
5668 2270 : if (f->sym)
5669 : {
5670 2223 : gfc_namespace *ns = f->sym->ns;
5671 2223 : if (ns && ns->proc_name == sym)
5672 : return ns;
5673 : }
5674 :
5675 114051 : return sym->ns;
5676 : }
5677 :
5678 :
5679 : /* Given a symbol, returns the namespace in which the symbol is specified.
5680 : In most cases, it is the namespace hosting the symbol. This is the case
5681 : for variables. For functions, however, it is the function namespace
5682 : itself. This specification namespace is used to check conformance of
5683 : array spec bound expressions. */
5684 :
5685 : gfc_namespace *
5686 1685650 : gfc_get_spec_ns (gfc_symbol *sym)
5687 : {
5688 1685650 : if (sym->attr.flavor == FL_PROCEDURE
5689 472432 : && sym->attr.function)
5690 : {
5691 316554 : if (sym->result == sym)
5692 228436 : return gfc_get_procedure_ns (sym);
5693 : /* Generic and intrinsic functions can have a null result. */
5694 88118 : else if (sym->result != nullptr)
5695 37222 : return sym->result->ns;
5696 : }
5697 :
5698 1419992 : return sym->ns;
5699 : }
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