Line data Source code
1 : /* Deal with interfaces.
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 : /* Deal with interfaces. An explicit interface is represented as a
23 : singly linked list of formal argument structures attached to the
24 : relevant symbols. For an implicit interface, the arguments don't
25 : point to symbols. Explicit interfaces point to namespaces that
26 : contain the symbols within that interface.
27 :
28 : Implicit interfaces are linked together in a singly linked list
29 : along the next_if member of symbol nodes. Since a particular
30 : symbol can only have a single explicit interface, the symbol cannot
31 : be part of multiple lists and a single next-member suffices.
32 :
33 : This is not the case for general classes, though. An operator
34 : definition is independent of just about all other uses and has it's
35 : own head pointer.
36 :
37 : Nameless interfaces:
38 : Nameless interfaces create symbols with explicit interfaces within
39 : the current namespace. They are otherwise unlinked.
40 :
41 : Generic interfaces:
42 : The generic name points to a linked list of symbols. Each symbol
43 : has an explicit interface. Each explicit interface has its own
44 : namespace containing the arguments. Module procedures are symbols in
45 : which the interface is added later when the module procedure is parsed.
46 :
47 : User operators:
48 : User-defined operators are stored in a their own set of symtrees
49 : separate from regular symbols. The symtrees point to gfc_user_op
50 : structures which in turn head up a list of relevant interfaces.
51 :
52 : Extended intrinsics and assignment:
53 : The head of these interface lists are stored in the containing namespace.
54 :
55 : Implicit interfaces:
56 : An implicit interface is represented as a singly linked list of
57 : formal argument list structures that don't point to any symbol
58 : nodes -- they just contain types.
59 :
60 :
61 : When a subprogram is defined, the program unit's name points to an
62 : interface as usual, but the link to the namespace is NULL and the
63 : formal argument list points to symbols within the same namespace as
64 : the program unit name. */
65 :
66 : #include "config.h"
67 : #include "system.h"
68 : #include "coretypes.h"
69 : #include "options.h"
70 : #include "gfortran.h"
71 : #include "match.h"
72 : #include "arith.h"
73 :
74 : /* The current_interface structure holds information about the
75 : interface currently being parsed. This structure is saved and
76 : restored during recursive interfaces. */
77 :
78 : gfc_interface_info current_interface;
79 :
80 :
81 : /* Free the leading members of the gfc_interface linked list given in INTR
82 : up to the END element (exclusive: the END element is not freed).
83 : If END is not nullptr, it is assumed that END is in the linked list starting
84 : with INTR. */
85 :
86 : static void
87 22255371 : free_interface_elements_until (gfc_interface *intr, gfc_interface *end)
88 : {
89 22255371 : gfc_interface *next;
90 :
91 22455157 : for (; intr != end; intr = next)
92 : {
93 199786 : next = intr->next;
94 199786 : free (intr);
95 : }
96 0 : }
97 :
98 :
99 : /* Free a singly linked list of gfc_interface structures. */
100 :
101 : void
102 21542292 : gfc_free_interface (gfc_interface *intr)
103 : {
104 21542292 : free_interface_elements_until (intr, nullptr);
105 21542292 : }
106 :
107 :
108 : /* Update the interface pointer given by IFC_PTR to make it point to TAIL.
109 : It is expected that TAIL (if non-null) is in the list pointed to by
110 : IFC_PTR, hence the tail of it. The members of the list before TAIL are
111 : freed before the pointer reassignment. */
112 :
113 : void
114 9144837 : gfc_drop_interface_elements_before (gfc_interface **ifc_ptr,
115 : gfc_interface *tail)
116 : {
117 9144837 : if (ifc_ptr == nullptr)
118 : return;
119 :
120 713079 : free_interface_elements_until (*ifc_ptr, tail);
121 713079 : *ifc_ptr = tail;
122 : }
123 :
124 :
125 : /* Change the operators unary plus and minus into binary plus and
126 : minus respectively, leaving the rest unchanged. */
127 :
128 : static gfc_intrinsic_op
129 3003 : fold_unary_intrinsic (gfc_intrinsic_op op)
130 : {
131 0 : switch (op)
132 : {
133 0 : case INTRINSIC_UPLUS:
134 0 : op = INTRINSIC_PLUS;
135 0 : break;
136 56 : case INTRINSIC_UMINUS:
137 56 : op = INTRINSIC_MINUS;
138 0 : break;
139 : default:
140 : break;
141 : }
142 :
143 2989 : return op;
144 : }
145 :
146 :
147 : /* Return the operator depending on the DTIO moded string. Note that
148 : these are not operators in the normal sense and so have been placed
149 : beyond GFC_INTRINSIC_END in gfortran.h:enum gfc_intrinsic_op. */
150 :
151 : static gfc_intrinsic_op
152 410 : dtio_op (char* mode)
153 : {
154 410 : if (strcmp (mode, "formatted") == 0)
155 : return INTRINSIC_FORMATTED;
156 84 : if (strcmp (mode, "unformatted") == 0)
157 84 : return INTRINSIC_UNFORMATTED;
158 : return INTRINSIC_NONE;
159 : }
160 :
161 :
162 : /* Match a generic specification. Depending on which type of
163 : interface is found, the 'name' or 'op' pointers may be set.
164 : This subroutine doesn't return MATCH_NO. */
165 :
166 : match
167 29899 : gfc_match_generic_spec (interface_type *type,
168 : char *name,
169 : gfc_intrinsic_op *op)
170 : {
171 29899 : char buffer[GFC_MAX_SYMBOL_LEN + 1];
172 29899 : match m;
173 29899 : gfc_intrinsic_op i;
174 :
175 29899 : if (gfc_match (" assignment ( = )") == MATCH_YES)
176 : {
177 574 : *type = INTERFACE_INTRINSIC_OP;
178 574 : *op = INTRINSIC_ASSIGN;
179 574 : return MATCH_YES;
180 : }
181 :
182 29325 : if (gfc_match (" operator ( %o )", &i) == MATCH_YES)
183 : { /* Operator i/f */
184 770 : *type = INTERFACE_INTRINSIC_OP;
185 770 : *op = fold_unary_intrinsic (i);
186 770 : return MATCH_YES;
187 : }
188 :
189 28555 : *op = INTRINSIC_NONE;
190 28555 : if (gfc_match (" operator ( ") == MATCH_YES)
191 : {
192 368 : m = gfc_match_defined_op_name (buffer, 1);
193 368 : if (m == MATCH_NO)
194 0 : goto syntax;
195 368 : if (m != MATCH_YES)
196 : return MATCH_ERROR;
197 :
198 368 : m = gfc_match_char (')');
199 368 : if (m == MATCH_NO)
200 0 : goto syntax;
201 368 : if (m != MATCH_YES)
202 : return MATCH_ERROR;
203 :
204 368 : strcpy (name, buffer);
205 368 : *type = INTERFACE_USER_OP;
206 368 : return MATCH_YES;
207 : }
208 :
209 28187 : if (gfc_match (" read ( %n )", buffer) == MATCH_YES)
210 : {
211 166 : *op = dtio_op (buffer);
212 166 : if (*op == INTRINSIC_FORMATTED)
213 : {
214 123 : if (flag_default_integer)
215 0 : goto conflict;
216 123 : strcpy (name, gfc_code2string (dtio_procs, DTIO_RF));
217 123 : *type = INTERFACE_DTIO;
218 : }
219 166 : if (*op == INTRINSIC_UNFORMATTED)
220 : {
221 43 : if (flag_default_integer)
222 0 : goto conflict;
223 43 : strcpy (name, gfc_code2string (dtio_procs, DTIO_RUF));
224 43 : *type = INTERFACE_DTIO;
225 : }
226 166 : if (*op != INTRINSIC_NONE)
227 : return MATCH_YES;
228 : }
229 :
230 28021 : if (gfc_match (" write ( %n )", buffer) == MATCH_YES)
231 : {
232 244 : *op = dtio_op (buffer);
233 244 : if (*op == INTRINSIC_FORMATTED)
234 : {
235 203 : if (flag_default_integer)
236 1 : goto conflict;
237 202 : strcpy (name, gfc_code2string (dtio_procs, DTIO_WF));
238 202 : *type = INTERFACE_DTIO;
239 : }
240 243 : if (*op == INTRINSIC_UNFORMATTED)
241 : {
242 41 : if (flag_default_integer)
243 0 : goto conflict;
244 41 : strcpy (name, gfc_code2string (dtio_procs, DTIO_WUF));
245 41 : *type = INTERFACE_DTIO;
246 : }
247 243 : if (*op != INTRINSIC_NONE)
248 : return MATCH_YES;
249 : }
250 :
251 27777 : if (gfc_match_name (buffer) == MATCH_YES)
252 : {
253 22041 : strcpy (name, buffer);
254 22041 : *type = INTERFACE_GENERIC;
255 22041 : return MATCH_YES;
256 : }
257 :
258 5736 : *type = INTERFACE_NAMELESS;
259 5736 : return MATCH_YES;
260 :
261 1 : conflict:
262 1 : gfc_error ("Sorry: -fdefault-integer-8 option is not supported with "
263 : "user-defined input/output at %C");
264 1 : return MATCH_ERROR;
265 :
266 0 : syntax:
267 0 : gfc_error ("Syntax error in generic specification at %C");
268 0 : return MATCH_ERROR;
269 : }
270 :
271 :
272 : /* Match one of the five F95 forms of an interface statement. The
273 : matcher for the abstract interface follows. */
274 :
275 : match
276 10859 : gfc_match_interface (void)
277 : {
278 10859 : char name[GFC_MAX_SYMBOL_LEN + 1];
279 10859 : interface_type type;
280 10859 : gfc_symbol *sym;
281 10859 : gfc_intrinsic_op op;
282 10859 : match m;
283 :
284 10859 : m = gfc_match_space ();
285 :
286 10859 : if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
287 : return MATCH_ERROR;
288 :
289 : /* If we're not looking at the end of the statement now, or if this
290 : is not a nameless interface but we did not see a space, punt. */
291 10858 : if (gfc_match_eos () != MATCH_YES
292 10858 : || (type != INTERFACE_NAMELESS && m != MATCH_YES))
293 : {
294 0 : gfc_error ("Syntax error: Trailing garbage in INTERFACE statement "
295 : "at %C");
296 0 : return MATCH_ERROR;
297 : }
298 :
299 10858 : current_interface.type = type;
300 :
301 10858 : switch (type)
302 : {
303 4414 : case INTERFACE_DTIO:
304 4414 : case INTERFACE_GENERIC:
305 4414 : if (gfc_get_symbol (name, NULL, &sym))
306 : return MATCH_ERROR;
307 :
308 4414 : if (!sym->attr.generic
309 4414 : && !gfc_add_generic (&sym->attr, sym->name, NULL))
310 : return MATCH_ERROR;
311 :
312 4413 : if (sym->attr.dummy)
313 : {
314 0 : gfc_error ("Dummy procedure %qs at %C cannot have a "
315 : "generic interface", sym->name);
316 0 : return MATCH_ERROR;
317 : }
318 :
319 4413 : current_interface.sym = gfc_new_block = sym;
320 4413 : break;
321 :
322 156 : case INTERFACE_USER_OP:
323 156 : current_interface.uop = gfc_get_uop (name);
324 156 : break;
325 :
326 556 : case INTERFACE_INTRINSIC_OP:
327 556 : current_interface.op = op;
328 556 : break;
329 :
330 : case INTERFACE_NAMELESS:
331 : case INTERFACE_ABSTRACT:
332 : break;
333 : }
334 :
335 : return MATCH_YES;
336 : }
337 :
338 :
339 :
340 : /* Match a F2003 abstract interface. */
341 :
342 : match
343 476 : gfc_match_abstract_interface (void)
344 : {
345 476 : match m;
346 :
347 476 : if (!gfc_notify_std (GFC_STD_F2003, "ABSTRACT INTERFACE at %C"))
348 : return MATCH_ERROR;
349 :
350 475 : m = gfc_match_eos ();
351 :
352 475 : if (m != MATCH_YES)
353 : {
354 1 : gfc_error ("Syntax error in ABSTRACT INTERFACE statement at %C");
355 1 : return MATCH_ERROR;
356 : }
357 :
358 474 : current_interface.type = INTERFACE_ABSTRACT;
359 :
360 474 : return m;
361 : }
362 :
363 :
364 : /* Match the different sort of generic-specs that can be present after
365 : the END INTERFACE itself. */
366 :
367 : match
368 696 : gfc_match_end_interface (void)
369 : {
370 696 : char name[GFC_MAX_SYMBOL_LEN + 1];
371 696 : interface_type type;
372 696 : gfc_intrinsic_op op;
373 696 : match m;
374 :
375 696 : m = gfc_match_space ();
376 :
377 696 : if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR)
378 : return MATCH_ERROR;
379 :
380 : /* If we're not looking at the end of the statement now, or if this
381 : is not a nameless interface but we did not see a space, punt. */
382 696 : if (gfc_match_eos () != MATCH_YES
383 696 : || (type != INTERFACE_NAMELESS && m != MATCH_YES))
384 : {
385 0 : gfc_error ("Syntax error: Trailing garbage in END INTERFACE "
386 : "statement at %C");
387 0 : return MATCH_ERROR;
388 : }
389 :
390 696 : m = MATCH_YES;
391 :
392 696 : switch (current_interface.type)
393 : {
394 0 : case INTERFACE_NAMELESS:
395 0 : case INTERFACE_ABSTRACT:
396 0 : if (type != INTERFACE_NAMELESS)
397 : {
398 0 : gfc_error ("Expected a nameless interface at %C");
399 0 : m = MATCH_ERROR;
400 : }
401 :
402 : break;
403 :
404 157 : case INTERFACE_INTRINSIC_OP:
405 157 : if (type != current_interface.type || op != current_interface.op)
406 : {
407 :
408 14 : if (current_interface.op == INTRINSIC_ASSIGN)
409 : {
410 0 : m = MATCH_ERROR;
411 0 : gfc_error ("Expected %<END INTERFACE ASSIGNMENT (=)%> at %C");
412 : }
413 : else
414 : {
415 14 : const char *s1, *s2;
416 14 : s1 = gfc_op2string (current_interface.op);
417 14 : s2 = gfc_op2string (op);
418 :
419 : /* The following if-statements are used to enforce C1202
420 : from F2003. */
421 14 : if ((strcmp(s1, "==") == 0 && strcmp (s2, ".eq.") == 0)
422 13 : || (strcmp(s1, ".eq.") == 0 && strcmp (s2, "==") == 0))
423 : break;
424 12 : if ((strcmp(s1, "/=") == 0 && strcmp (s2, ".ne.") == 0)
425 11 : || (strcmp(s1, ".ne.") == 0 && strcmp (s2, "/=") == 0))
426 : break;
427 10 : if ((strcmp(s1, "<=") == 0 && strcmp (s2, ".le.") == 0)
428 9 : || (strcmp(s1, ".le.") == 0 && strcmp (s2, "<=") == 0))
429 : break;
430 8 : if ((strcmp(s1, "<") == 0 && strcmp (s2, ".lt.") == 0)
431 7 : || (strcmp(s1, ".lt.") == 0 && strcmp (s2, "<") == 0))
432 : break;
433 6 : if ((strcmp(s1, ">=") == 0 && strcmp (s2, ".ge.") == 0)
434 5 : || (strcmp(s1, ".ge.") == 0 && strcmp (s2, ">=") == 0))
435 : break;
436 4 : if ((strcmp(s1, ">") == 0 && strcmp (s2, ".gt.") == 0)
437 3 : || (strcmp(s1, ".gt.") == 0 && strcmp (s2, ">") == 0))
438 : break;
439 :
440 2 : m = MATCH_ERROR;
441 2 : if (strcmp(s2, "none") == 0)
442 1 : gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> "
443 : "at %C", s1);
444 : else
445 1 : gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, "
446 : "but got %qs", s1, s2);
447 : }
448 :
449 : }
450 :
451 : break;
452 :
453 15 : case INTERFACE_USER_OP:
454 : /* Comparing the symbol node names is OK because only use-associated
455 : symbols can be renamed. */
456 15 : if (type != current_interface.type
457 15 : || strcmp (current_interface.uop->name, name) != 0)
458 : {
459 0 : gfc_error ("Expecting %<END INTERFACE OPERATOR (.%s.)%> at %C",
460 0 : current_interface.uop->name);
461 0 : m = MATCH_ERROR;
462 : }
463 :
464 : break;
465 :
466 524 : case INTERFACE_DTIO:
467 524 : case INTERFACE_GENERIC:
468 : /* If a use-associated symbol is renamed, check the local_name. */
469 524 : const char *local_name = current_interface.sym->name;
470 :
471 524 : if (current_interface.sym->attr.use_assoc
472 4 : && current_interface.sym->attr.use_rename
473 2 : && current_interface.sym->ns->use_stmts->rename
474 2 : && (current_interface.sym->ns->use_stmts->rename->local_name[0]
475 : != '\0'))
476 1 : local_name = current_interface.sym->ns->use_stmts->rename->local_name;
477 :
478 524 : if (type != current_interface.type
479 524 : || strcmp (local_name, name) != 0)
480 : {
481 0 : gfc_error ("Expecting %<END INTERFACE %s%> at %C", local_name);
482 0 : m = MATCH_ERROR;
483 : }
484 :
485 : break;
486 : }
487 :
488 : return m;
489 : }
490 :
491 :
492 : /* Return whether the component was defined anonymously. */
493 :
494 : static bool
495 9769 : is_anonymous_component (gfc_component *cmp)
496 : {
497 : /* Only UNION and MAP components are anonymous. In the case of a MAP,
498 : the derived type symbol is FL_STRUCT and the component name looks like mM*.
499 : This is the only case in which the second character of a component name is
500 : uppercase. */
501 9769 : return cmp->ts.type == BT_UNION
502 9769 : || (cmp->ts.type == BT_DERIVED
503 3640 : && cmp->ts.u.derived->attr.flavor == FL_STRUCT
504 72 : && cmp->name[0] && cmp->name[1] && ISUPPER (cmp->name[1]));
505 : }
506 :
507 :
508 : /* Return whether the derived type was defined anonymously. */
509 :
510 : static bool
511 599061 : is_anonymous_dt (gfc_symbol *derived)
512 : {
513 : /* UNION and MAP types are always anonymous. Otherwise, only nested STRUCTURE
514 : types can be anonymous. For anonymous MAP/STRUCTURE, we have FL_STRUCT
515 : and the type name looks like XX*. This is the only case in which the
516 : second character of a type name is uppercase. */
517 599061 : return derived->attr.flavor == FL_UNION
518 599061 : || (derived->attr.flavor == FL_STRUCT
519 3345 : && derived->name[0] && derived->name[1] && ISUPPER (derived->name[1]));
520 : }
521 :
522 :
523 : /* Compare components according to 4.4.2 of the Fortran standard. */
524 :
525 : static bool
526 5048 : compare_components (gfc_component *cmp1, gfc_component *cmp2,
527 : gfc_symbol *derived1, gfc_symbol *derived2)
528 : {
529 : /* Compare names, but not for anonymous components such as UNION or MAP. */
530 4721 : if (!is_anonymous_component (cmp1) && !is_anonymous_component (cmp2)
531 9484 : && strcmp (cmp1->name, cmp2->name) != 0)
532 : return false;
533 :
534 4185 : if (cmp1->attr.access != cmp2->attr.access)
535 : return false;
536 :
537 4184 : if (cmp1->attr.pointer != cmp2->attr.pointer)
538 : return false;
539 :
540 4184 : if (cmp1->attr.dimension != cmp2->attr.dimension)
541 : return false;
542 :
543 4050 : if (cmp1->attr.codimension != cmp2->attr.codimension)
544 : return false;
545 :
546 4050 : if (cmp1->attr.allocatable != cmp2->attr.allocatable)
547 : return false;
548 :
549 4050 : if (cmp1->attr.dimension && gfc_compare_array_spec (cmp1->as, cmp2->as) == 0)
550 : return false;
551 :
552 3646 : if (cmp1->attr.codimension
553 3646 : && gfc_compare_array_spec (cmp1->as, cmp2->as) == 0)
554 : return false;
555 :
556 3646 : if (cmp1->ts.type == BT_CHARACTER && cmp2->ts.type == BT_CHARACTER)
557 : {
558 75 : gfc_charlen *l1 = cmp1->ts.u.cl;
559 75 : gfc_charlen *l2 = cmp2->ts.u.cl;
560 75 : if (l1 && l2 && l1->length && l2->length
561 75 : && l1->length->expr_type == EXPR_CONSTANT
562 75 : && l2->length->expr_type == EXPR_CONSTANT
563 150 : && gfc_dep_compare_expr (l1->length, l2->length) != 0)
564 : return false;
565 : }
566 :
567 : /* Make sure that link lists do not put this function into an
568 : endless recursive loop! */
569 1421 : if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived)
570 3494 : && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)
571 7135 : && !gfc_compare_types (&cmp1->ts, &cmp2->ts))
572 : return false;
573 :
574 3223 : else if ( (cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived)
575 147 : && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived))
576 : return false;
577 :
578 3223 : else if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived)
579 3076 : && (cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived))
580 : return false;
581 :
582 : return true;
583 : }
584 :
585 :
586 : /* Compare two union types by comparing the components of their maps.
587 : Because unions and maps are anonymous their types get special internal
588 : names; therefore the usual derived type comparison will fail on them.
589 :
590 : Returns nonzero if equal, as with gfc_compare_derived_types. Also as with
591 : gfc_compare_derived_types, 'equal' is closer to meaning 'duplicate
592 : definitions' than 'equivalent structure'. */
593 :
594 : static bool
595 793 : compare_union_types (gfc_symbol *un1, gfc_symbol *un2)
596 : {
597 793 : gfc_component *map1, *map2, *cmp1, *cmp2;
598 793 : gfc_symbol *map1_t, *map2_t;
599 :
600 793 : if (un1->attr.flavor != FL_UNION || un2->attr.flavor != FL_UNION)
601 : return false;
602 :
603 148 : if (un1->attr.zero_comp != un2->attr.zero_comp)
604 : return false;
605 :
606 148 : if (un1->attr.zero_comp)
607 : return true;
608 :
609 146 : map1 = un1->components;
610 146 : map2 = un2->components;
611 :
612 : /* In terms of 'equality' here we are worried about types which are
613 : declared the same in two places, not types that represent equivalent
614 : structures. (This is common because of FORTRAN's weird scoping rules.)
615 : Though two unions with their maps in different orders could be equivalent,
616 : we will say they are not equal for the purposes of this test; therefore
617 : we compare the maps sequentially. */
618 229 : for (;;)
619 : {
620 229 : map1_t = map1->ts.u.derived;
621 229 : map2_t = map2->ts.u.derived;
622 :
623 229 : cmp1 = map1_t->components;
624 229 : cmp2 = map2_t->components;
625 :
626 : /* Protect against null components. */
627 229 : if (map1_t->attr.zero_comp != map2_t->attr.zero_comp)
628 : return false;
629 :
630 229 : if (map1_t->attr.zero_comp)
631 : return true;
632 :
633 609 : for (;;)
634 : {
635 : /* No two fields will ever point to the same map type unless they are
636 : the same component, because one map field is created with its type
637 : declaration. Therefore don't worry about recursion here. */
638 : /* TODO: worry about recursion into parent types of the unions? */
639 609 : if (!compare_components (cmp1, cmp2, map1_t, map2_t))
640 : return false;
641 :
642 603 : cmp1 = cmp1->next;
643 603 : cmp2 = cmp2->next;
644 :
645 603 : if (cmp1 == NULL && cmp2 == NULL)
646 : break;
647 384 : if (cmp1 == NULL || cmp2 == NULL)
648 : return false;
649 : }
650 :
651 219 : map1 = map1->next;
652 219 : map2 = map2->next;
653 :
654 219 : if (map1 == NULL && map2 == NULL)
655 : break;
656 83 : if (map1 == NULL || map2 == NULL)
657 : return false;
658 : }
659 :
660 : return true;
661 : }
662 :
663 :
664 :
665 : /* Compare two derived types using the criteria in 4.4.2 of the standard,
666 : recursing through gfc_compare_types for the components. */
667 :
668 : bool
669 630138 : gfc_compare_derived_types (gfc_symbol *derived1, gfc_symbol *derived2)
670 : {
671 630138 : gfc_component *cmp1, *cmp2;
672 :
673 630138 : if (derived1 == derived2)
674 : return true;
675 :
676 331025 : if (!derived1 || !derived2)
677 0 : gfc_internal_error ("gfc_compare_derived_types: invalid derived type");
678 :
679 331025 : if (derived1->attr.unlimited_polymorphic
680 187 : && derived2->attr.unlimited_polymorphic)
681 : return true;
682 :
683 330852 : if (derived1->attr.unlimited_polymorphic
684 330852 : != derived2->attr.unlimited_polymorphic)
685 : return false;
686 :
687 : /* Compare UNION types specially. */
688 330763 : if (derived1->attr.flavor == FL_UNION || derived2->attr.flavor == FL_UNION)
689 645 : return compare_union_types (derived1, derived2);
690 :
691 : /* Special case for comparing derived types across namespaces. If the
692 : true names and module names are the same and the module name is
693 : nonnull, then they are equal. */
694 330118 : if (strcmp (derived1->name, derived2->name) == 0
695 32903 : && derived1->module != NULL && derived2->module != NULL
696 30469 : && strcmp (derived1->module, derived2->module) == 0)
697 : return true;
698 :
699 : /* Compare type via the rules of the standard. Both types must have the
700 : SEQUENCE or BIND(C) attribute to be equal. We also compare types
701 : recursively if they are class descriptors types or virtual tables types.
702 : STRUCTUREs are special because they can be anonymous; therefore two
703 : structures with different names may be equal. */
704 :
705 : /* Compare names, but not for anonymous types such as UNION or MAP. */
706 298966 : if (!is_anonymous_dt (derived1) && !is_anonymous_dt (derived2)
707 598706 : && strcmp (derived1->name, derived2->name) != 0)
708 : return false;
709 :
710 4364 : if (derived1->component_access == ACCESS_PRIVATE
711 4363 : || derived2->component_access == ACCESS_PRIVATE)
712 : return false;
713 :
714 4363 : if (!(derived1->attr.sequence && derived2->attr.sequence)
715 2622 : && !(derived1->attr.is_bind_c && derived2->attr.is_bind_c)
716 2609 : && !(derived1->attr.is_class && derived2->attr.is_class)
717 1677 : && !(derived1->attr.vtype && derived2->attr.vtype)
718 1519 : && !(derived1->attr.pdt_type && derived2->attr.pdt_type))
719 : return false;
720 :
721 : /* Protect against null components. */
722 2844 : if (derived1->attr.zero_comp != derived2->attr.zero_comp)
723 : return false;
724 :
725 2835 : if (derived1->attr.zero_comp)
726 : return true;
727 :
728 2835 : cmp1 = derived1->components;
729 2835 : cmp2 = derived2->components;
730 :
731 : /* Since subtypes of SEQUENCE types must be SEQUENCE types as well, a
732 : simple test can speed things up. Otherwise, lots of things have to
733 : match. */
734 4439 : for (;;)
735 : {
736 4439 : if (!compare_components (cmp1, cmp2, derived1, derived2))
737 : return false;
738 :
739 2620 : cmp1 = cmp1->next;
740 2620 : cmp2 = cmp2->next;
741 :
742 2620 : if (cmp1 == NULL && cmp2 == NULL)
743 : break;
744 1610 : if (cmp1 == NULL || cmp2 == NULL)
745 : return false;
746 : }
747 :
748 : return true;
749 : }
750 :
751 :
752 : /* Compare two typespecs, recursively if necessary. */
753 :
754 : bool
755 7534061 : gfc_compare_types (gfc_typespec *ts1, gfc_typespec *ts2)
756 : {
757 : /* See if one of the typespecs is a BT_VOID, which is what is being used
758 : to allow the funcs like c_f_pointer to accept any pointer type.
759 : TODO: Possibly should narrow this to just the one typespec coming in
760 : that is for the formal arg, but oh well. */
761 7534061 : if (ts1->type == BT_VOID || ts2->type == BT_VOID)
762 : return true;
763 :
764 : /* Special case for our C interop types. FIXME: There should be a
765 : better way of doing this. When ISO C binding is cleared up,
766 : this can probably be removed. See PR 57048. */
767 :
768 7534032 : if ((ts1->type == BT_INTEGER
769 2006469 : && ts2->type == BT_DERIVED
770 5656 : && ts1->f90_type == BT_VOID
771 86 : && ts2->u.derived->from_intmod == INTMOD_ISO_C_BINDING
772 86 : && ts1->u.derived
773 86 : && strcmp (ts1->u.derived->name, ts2->u.derived->name) == 0)
774 7533947 : || (ts2->type == BT_INTEGER
775 2145876 : && ts1->type == BT_DERIVED
776 5212 : && ts2->f90_type == BT_VOID
777 84 : && ts1->u.derived->from_intmod == INTMOD_ISO_C_BINDING
778 84 : && ts2->u.derived
779 84 : && strcmp (ts1->u.derived->name, ts2->u.derived->name) == 0))
780 : return true;
781 :
782 : /* The _data component is not always present, therefore check for its
783 : presence before assuming, that its derived->attr is available.
784 : When the _data component is not present, then nevertheless the
785 : unlimited_polymorphic flag may be set in the derived type's attr. */
786 7533863 : if (ts1->type == BT_CLASS && ts1->u.derived->components
787 32265 : && ((ts1->u.derived->attr.is_class
788 32258 : && ts1->u.derived->components->ts.u.derived->attr
789 32258 : .unlimited_polymorphic)
790 26780 : || ts1->u.derived->attr.unlimited_polymorphic))
791 : return true;
792 :
793 : /* F2003: C717 */
794 7528378 : if (ts2->type == BT_CLASS && ts1->type == BT_DERIVED
795 977 : && ts2->u.derived->components
796 976 : && ((ts2->u.derived->attr.is_class
797 974 : && ts2->u.derived->components->ts.u.derived->attr
798 974 : .unlimited_polymorphic)
799 935 : || ts2->u.derived->attr.unlimited_polymorphic)
800 41 : && (ts1->u.derived->attr.sequence || ts1->u.derived->attr.is_bind_c))
801 : return true;
802 :
803 7528352 : if (ts1->type != ts2->type
804 1061741 : && ((ts1->type != BT_DERIVED && ts1->type != BT_CLASS)
805 72303 : || (ts2->type != BT_DERIVED && ts2->type != BT_CLASS)))
806 : return false;
807 :
808 6475584 : if (ts1->type == BT_UNION)
809 148 : return compare_union_types (ts1->u.derived, ts2->u.derived);
810 :
811 6475436 : if (ts1->type != BT_DERIVED && ts1->type != BT_CLASS)
812 6189956 : return (ts1->kind == ts2->kind);
813 :
814 : /* Compare derived types. */
815 285480 : return gfc_type_compatible (ts1, ts2);
816 : }
817 :
818 :
819 : static bool
820 5312741 : compare_type (gfc_symbol *s1, gfc_symbol *s2)
821 : {
822 5312741 : if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK))
823 : return true;
824 :
825 5112293 : return gfc_compare_types (&s1->ts, &s2->ts) || s2->ts.type == BT_ASSUMED;
826 : }
827 :
828 :
829 : static bool
830 309611 : compare_type_characteristics (gfc_symbol *s1, gfc_symbol *s2)
831 : {
832 : /* TYPE and CLASS of the same declared type are type compatible,
833 : but have different characteristics. */
834 309611 : if ((s1->ts.type == BT_CLASS && s2->ts.type == BT_DERIVED)
835 309603 : || (s1->ts.type == BT_DERIVED && s2->ts.type == BT_CLASS))
836 : return false;
837 :
838 309602 : return compare_type (s1, s2);
839 : }
840 :
841 :
842 : static bool
843 921439 : compare_rank (gfc_symbol *s1, gfc_symbol *s2)
844 : {
845 921439 : gfc_array_spec *as1, *as2;
846 921439 : int r1, r2;
847 :
848 921439 : if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK))
849 : return true;
850 :
851 716522 : as1 = (s1->ts.type == BT_CLASS
852 5169 : && !s1->ts.u.derived->attr.unlimited_polymorphic)
853 726856 : ? CLASS_DATA (s1)->as : s1->as;
854 716540 : as2 = (s2->ts.type == BT_CLASS
855 5151 : && !s2->ts.u.derived->attr.unlimited_polymorphic)
856 726838 : ? CLASS_DATA (s2)->as : s2->as;
857 :
858 721689 : r1 = as1 ? as1->rank : 0;
859 721689 : r2 = as2 ? as2->rank : 0;
860 :
861 721689 : if (r1 != r2 && (!as2 || as2->type != AS_ASSUMED_RANK))
862 3862 : return false; /* Ranks differ. */
863 :
864 : return true;
865 : }
866 :
867 :
868 : /* Given two symbols that are formal arguments, compare their ranks
869 : and types. Returns true if they have the same rank and type,
870 : false otherwise. */
871 :
872 : static bool
873 4999832 : compare_type_rank (gfc_symbol *s1, gfc_symbol *s2)
874 : {
875 4999832 : return compare_type (s1, s2) && compare_rank (s1, s2);
876 : }
877 :
878 :
879 : /* Given two symbols that are formal arguments, compare their types
880 : and rank and their formal interfaces if they are both dummy
881 : procedures. Returns true if the same, false if different. */
882 :
883 : static bool
884 4881825 : compare_type_rank_if (gfc_symbol *s1, gfc_symbol *s2)
885 : {
886 4881825 : if (s1 == NULL || s2 == NULL)
887 120 : return (s1 == s2);
888 :
889 4881705 : if (s1 == s2)
890 : return true;
891 :
892 4881705 : if (s1->attr.flavor != FL_PROCEDURE && s2->attr.flavor != FL_PROCEDURE)
893 4881535 : return compare_type_rank (s1, s2);
894 :
895 170 : if (s1->attr.flavor != FL_PROCEDURE || s2->attr.flavor != FL_PROCEDURE)
896 : return false;
897 :
898 : /* At this point, both symbols are procedures. It can happen that
899 : external procedures are compared, where one is identified by usage
900 : to be a function or subroutine but the other is not. Check TKR
901 : nonetheless for these cases. */
902 6 : if (s1->attr.function == 0 && s1->attr.subroutine == 0)
903 2 : return s1->attr.external ? compare_type_rank (s1, s2) : false;
904 :
905 4 : if (s2->attr.function == 0 && s2->attr.subroutine == 0)
906 0 : return s2->attr.external ? compare_type_rank (s1, s2) : false;
907 :
908 : /* Now the type of procedure has been identified. */
909 4 : if (s1->attr.function != s2->attr.function
910 4 : || s1->attr.subroutine != s2->attr.subroutine)
911 : return false;
912 :
913 4 : if (s1->attr.function && !compare_type_rank (s1, s2))
914 : return false;
915 :
916 : /* Originally, gfortran recursed here to check the interfaces of passed
917 : procedures. This is explicitly not required by the standard. */
918 : return true;
919 : }
920 :
921 :
922 : /* Given a formal argument list and a keyword name, search the list
923 : for that keyword. Returns the correct symbol node if found, NULL
924 : if not found. */
925 :
926 : static gfc_symbol *
927 34328 : find_keyword_arg (const char *name, gfc_formal_arglist *f)
928 : {
929 49586 : for (; f; f = f->next)
930 49586 : if (strcmp (f->sym->name, name) == 0)
931 : return f->sym;
932 :
933 : return NULL;
934 : }
935 :
936 :
937 : /******** Interface checking subroutines **********/
938 :
939 :
940 : /* Given an operator interface and the operator, make sure that all
941 : interfaces for that operator are legal. */
942 :
943 : bool
944 3599 : gfc_check_operator_interface (gfc_symbol *sym, gfc_intrinsic_op op,
945 : locus opwhere)
946 : {
947 3599 : gfc_formal_arglist *formal;
948 3599 : sym_intent i1, i2;
949 3599 : bt t1, t2;
950 3599 : int args, r1, r2, k1, k2;
951 :
952 3599 : gcc_assert (sym);
953 :
954 3599 : args = 0;
955 3599 : t1 = t2 = BT_UNKNOWN;
956 3599 : i1 = i2 = INTENT_UNKNOWN;
957 3599 : r1 = r2 = -1;
958 3599 : k1 = k2 = -1;
959 :
960 10765 : for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next)
961 : {
962 7167 : gfc_symbol *fsym = formal->sym;
963 7167 : if (fsym == NULL)
964 : {
965 1 : gfc_error ("Alternate return cannot appear in operator "
966 : "interface at %L", &sym->declared_at);
967 1 : return false;
968 : }
969 7166 : if (args == 0)
970 : {
971 3599 : t1 = fsym->ts.type;
972 3599 : i1 = fsym->attr.intent;
973 3599 : r1 = (fsym->as != NULL) ? fsym->as->rank : 0;
974 3599 : k1 = fsym->ts.kind;
975 : }
976 7166 : if (args == 1)
977 : {
978 3567 : t2 = fsym->ts.type;
979 3567 : i2 = fsym->attr.intent;
980 3567 : r2 = (fsym->as != NULL) ? fsym->as->rank : 0;
981 3567 : k2 = fsym->ts.kind;
982 : }
983 7166 : args++;
984 : }
985 :
986 : /* Only +, - and .not. can be unary operators.
987 : .not. cannot be a binary operator. */
988 3598 : if (args == 0 || args > 2 || (args == 1 && op != INTRINSIC_PLUS
989 30 : && op != INTRINSIC_MINUS
990 30 : && op != INTRINSIC_NOT)
991 3597 : || (args == 2 && op == INTRINSIC_NOT))
992 : {
993 1 : if (op == INTRINSIC_ASSIGN)
994 0 : gfc_error ("Assignment operator interface at %L must have "
995 : "two arguments", &sym->declared_at);
996 : else
997 1 : gfc_error ("Operator interface at %L has the wrong number of arguments",
998 : &sym->declared_at);
999 1 : return false;
1000 : }
1001 :
1002 : /* Check that intrinsics are mapped to functions, except
1003 : INTRINSIC_ASSIGN which should map to a subroutine. */
1004 3597 : if (op == INTRINSIC_ASSIGN)
1005 : {
1006 1385 : gfc_formal_arglist *dummy_args;
1007 :
1008 1385 : if (!sym->attr.subroutine)
1009 : {
1010 1 : gfc_error ("Assignment operator interface at %L must be "
1011 : "a SUBROUTINE", &sym->declared_at);
1012 1 : return false;
1013 : }
1014 :
1015 : /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments):
1016 : - First argument an array with different rank than second,
1017 : - First argument is a scalar and second an array,
1018 : - Types and kinds do not conform, or
1019 : - First argument is of derived type. */
1020 1384 : dummy_args = gfc_sym_get_dummy_args (sym);
1021 1384 : if (dummy_args->sym->ts.type != BT_DERIVED
1022 1153 : && dummy_args->sym->ts.type != BT_CLASS
1023 94 : && (r2 == 0 || r1 == r2)
1024 1473 : && (dummy_args->sym->ts.type == dummy_args->next->sym->ts.type
1025 84 : || (gfc_numeric_ts (&dummy_args->sym->ts)
1026 50 : && gfc_numeric_ts (&dummy_args->next->sym->ts))))
1027 : {
1028 5 : gfc_error ("Assignment operator interface at %L must not redefine "
1029 : "an INTRINSIC type assignment", &sym->declared_at);
1030 5 : return false;
1031 : }
1032 : }
1033 : else
1034 : {
1035 2212 : if (!sym->attr.function)
1036 : {
1037 1 : gfc_error ("Intrinsic operator interface at %L must be a FUNCTION",
1038 : &sym->declared_at);
1039 1 : return false;
1040 : }
1041 : }
1042 :
1043 : /* Check intents on operator interfaces. */
1044 3590 : if (op == INTRINSIC_ASSIGN)
1045 : {
1046 1379 : if (i1 != INTENT_OUT && i1 != INTENT_INOUT)
1047 : {
1048 0 : gfc_error ("First argument of defined assignment at %L must be "
1049 : "INTENT(OUT) or INTENT(INOUT)", &sym->declared_at);
1050 0 : return false;
1051 : }
1052 :
1053 1379 : if (i2 != INTENT_IN)
1054 : {
1055 0 : gfc_error ("Second argument of defined assignment at %L must be "
1056 : "INTENT(IN)", &sym->declared_at);
1057 0 : return false;
1058 : }
1059 : }
1060 : else
1061 : {
1062 2211 : if (i1 != INTENT_IN)
1063 : {
1064 0 : gfc_error ("First argument of operator interface at %L must be "
1065 : "INTENT(IN)", &sym->declared_at);
1066 0 : return false;
1067 : }
1068 :
1069 2211 : if (args == 2 && i2 != INTENT_IN)
1070 : {
1071 0 : gfc_error ("Second argument of operator interface at %L must be "
1072 : "INTENT(IN)", &sym->declared_at);
1073 0 : return false;
1074 : }
1075 : }
1076 :
1077 : /* From now on, all we have to do is check that the operator definition
1078 : doesn't conflict with an intrinsic operator. The rules for this
1079 : game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards,
1080 : as well as 12.3.2.1.1 of Fortran 2003:
1081 :
1082 : "If the operator is an intrinsic-operator (R310), the number of
1083 : function arguments shall be consistent with the intrinsic uses of
1084 : that operator, and the types, kind type parameters, or ranks of the
1085 : dummy arguments shall differ from those required for the intrinsic
1086 : operation (7.1.2)." */
1087 :
1088 : #define IS_NUMERIC_TYPE(t) \
1089 : ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX)
1090 :
1091 : /* Unary ops are easy, do them first. */
1092 3590 : if (op == INTRINSIC_NOT)
1093 : {
1094 5 : if (t1 == BT_LOGICAL)
1095 0 : goto bad_repl;
1096 : else
1097 : return true;
1098 : }
1099 :
1100 3585 : if (args == 1 && (op == INTRINSIC_PLUS || op == INTRINSIC_MINUS))
1101 : {
1102 25 : if (IS_NUMERIC_TYPE (t1))
1103 0 : goto bad_repl;
1104 : else
1105 : return true;
1106 : }
1107 :
1108 : /* Character intrinsic operators have same character kind, thus
1109 : operator definitions with operands of different character kinds
1110 : are always safe. */
1111 3560 : if (t1 == BT_CHARACTER && t2 == BT_CHARACTER && k1 != k2)
1112 : return true;
1113 :
1114 : /* Intrinsic operators always perform on arguments of same rank,
1115 : so different ranks is also always safe. (rank == 0) is an exception
1116 : to that, because all intrinsic operators are elemental. */
1117 3560 : if (r1 != r2 && r1 != 0 && r2 != 0)
1118 : return true;
1119 :
1120 3494 : switch (op)
1121 : {
1122 1019 : case INTRINSIC_EQ:
1123 1019 : case INTRINSIC_EQ_OS:
1124 1019 : case INTRINSIC_NE:
1125 1019 : case INTRINSIC_NE_OS:
1126 1019 : if (t1 == BT_CHARACTER && t2 == BT_CHARACTER)
1127 0 : goto bad_repl;
1128 : /* Fall through. */
1129 :
1130 1748 : case INTRINSIC_PLUS:
1131 1748 : case INTRINSIC_MINUS:
1132 1748 : case INTRINSIC_TIMES:
1133 1748 : case INTRINSIC_DIVIDE:
1134 1748 : case INTRINSIC_POWER:
1135 1748 : if (IS_NUMERIC_TYPE (t1) && IS_NUMERIC_TYPE (t2))
1136 2 : goto bad_repl;
1137 : break;
1138 :
1139 278 : case INTRINSIC_GT:
1140 278 : case INTRINSIC_GT_OS:
1141 278 : case INTRINSIC_GE:
1142 278 : case INTRINSIC_GE_OS:
1143 278 : case INTRINSIC_LT:
1144 278 : case INTRINSIC_LT_OS:
1145 278 : case INTRINSIC_LE:
1146 278 : case INTRINSIC_LE_OS:
1147 278 : if (t1 == BT_CHARACTER && t2 == BT_CHARACTER)
1148 1 : goto bad_repl;
1149 277 : if ((t1 == BT_INTEGER || t1 == BT_REAL)
1150 0 : && (t2 == BT_INTEGER || t2 == BT_REAL))
1151 0 : goto bad_repl;
1152 : break;
1153 :
1154 36 : case INTRINSIC_CONCAT:
1155 36 : if (t1 == BT_CHARACTER && t2 == BT_CHARACTER)
1156 0 : goto bad_repl;
1157 : break;
1158 :
1159 56 : case INTRINSIC_AND:
1160 56 : case INTRINSIC_OR:
1161 56 : case INTRINSIC_EQV:
1162 56 : case INTRINSIC_NEQV:
1163 56 : if (t1 == BT_LOGICAL && t2 == BT_LOGICAL)
1164 0 : goto bad_repl;
1165 : break;
1166 :
1167 : default:
1168 : break;
1169 : }
1170 :
1171 : return true;
1172 :
1173 : #undef IS_NUMERIC_TYPE
1174 :
1175 3 : bad_repl:
1176 3 : gfc_error ("Operator interface at %L conflicts with intrinsic interface",
1177 : &opwhere);
1178 3 : return false;
1179 : }
1180 :
1181 :
1182 : /* Given a pair of formal argument lists, we see if the two lists can
1183 : be distinguished by counting the number of nonoptional arguments of
1184 : a given type/rank in f1 and seeing if there are less then that
1185 : number of those arguments in f2 (including optional arguments).
1186 : Since this test is asymmetric, it has to be called twice to make it
1187 : symmetric. Returns nonzero if the argument lists are incompatible
1188 : by this test. This subroutine implements rule 1 of section F03:16.2.3.
1189 : 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1190 :
1191 : static bool
1192 897732 : count_types_test (gfc_formal_arglist *f1, gfc_formal_arglist *f2,
1193 : const char *p1, const char *p2)
1194 : {
1195 897732 : int ac1, ac2, i, j, k, n1;
1196 897732 : gfc_formal_arglist *f;
1197 :
1198 897732 : typedef struct
1199 : {
1200 : int flag;
1201 : gfc_symbol *sym;
1202 : }
1203 : arginfo;
1204 :
1205 897732 : arginfo *arg;
1206 :
1207 897732 : n1 = 0;
1208 :
1209 2540442 : for (f = f1; f; f = f->next)
1210 1642710 : n1++;
1211 :
1212 : /* Build an array of integers that gives the same integer to
1213 : arguments of the same type/rank. */
1214 897732 : arg = XCNEWVEC (arginfo, n1);
1215 :
1216 897732 : f = f1;
1217 3438174 : for (i = 0; i < n1; i++, f = f->next)
1218 : {
1219 1642710 : arg[i].flag = -1;
1220 1642710 : arg[i].sym = f->sym;
1221 : }
1222 :
1223 : k = 0;
1224 :
1225 2540442 : for (i = 0; i < n1; i++)
1226 : {
1227 1642710 : if (arg[i].flag != -1)
1228 276314 : continue;
1229 :
1230 1366396 : if (arg[i].sym && (arg[i].sym->attr.optional
1231 1366207 : || (p1 && strcmp (arg[i].sym->name, p1) == 0)))
1232 505 : continue; /* Skip OPTIONAL and PASS arguments. */
1233 :
1234 1365891 : arg[i].flag = k;
1235 :
1236 : /* Find other non-optional, non-pass arguments of the same type/rank. */
1237 2127742 : for (j = i + 1; j < n1; j++)
1238 761851 : if ((arg[j].sym == NULL
1239 761819 : || !(arg[j].sym->attr.optional
1240 188 : || (p1 && strcmp (arg[j].sym->name, p1) == 0)))
1241 1523312 : && (compare_type_rank_if (arg[i].sym, arg[j].sym)
1242 575251 : || compare_type_rank_if (arg[j].sym, arg[i].sym)))
1243 276314 : arg[j].flag = k;
1244 :
1245 1365891 : k++;
1246 : }
1247 :
1248 : /* Now loop over each distinct type found in f1. */
1249 : k = 0;
1250 1218583 : bool rc = false;
1251 :
1252 1218583 : for (i = 0; i < n1; i++)
1253 : {
1254 1115103 : if (arg[i].flag != k)
1255 48262 : continue;
1256 :
1257 1066841 : ac1 = 1;
1258 1828431 : for (j = i + 1; j < n1; j++)
1259 761590 : if (arg[j].flag == k)
1260 276293 : ac1++;
1261 :
1262 : /* Count the number of non-pass arguments in f2 with that type,
1263 : including those that are optional. */
1264 : ac2 = 0;
1265 :
1266 3022958 : for (f = f2; f; f = f->next)
1267 627 : if ((!p2 || strcmp (f->sym->name, p2) != 0)
1268 1956388 : && (compare_type_rank_if (arg[i].sym, f->sym)
1269 1589320 : || compare_type_rank_if (f->sym, arg[i].sym)))
1270 441309 : ac2++;
1271 :
1272 1066841 : if (ac1 > ac2)
1273 : {
1274 : rc = true;
1275 : break;
1276 : }
1277 :
1278 272589 : k++;
1279 : }
1280 :
1281 897732 : free (arg);
1282 :
1283 897732 : return rc;
1284 : }
1285 :
1286 :
1287 : /* Returns true if two dummy arguments are distinguishable due to their POINTER
1288 : and ALLOCATABLE attributes according to F2018 section 15.4.3.4.5 (3).
1289 : The function is asymmetric wrt to the arguments s1 and s2 and should always
1290 : be called twice (with flipped arguments in the second call). */
1291 :
1292 : static bool
1293 31329 : compare_ptr_alloc(gfc_symbol *s1, gfc_symbol *s2)
1294 : {
1295 : /* Is s1 allocatable? */
1296 31329 : const bool a1 = s1->ts.type == BT_CLASS ?
1297 31329 : CLASS_DATA(s1)->attr.allocatable : s1->attr.allocatable;
1298 : /* Is s2 a pointer? */
1299 31329 : const bool p2 = s2->ts.type == BT_CLASS ?
1300 31329 : CLASS_DATA(s2)->attr.class_pointer : s2->attr.pointer;
1301 31329 : return a1 && p2 && (s2->attr.intent != INTENT_IN);
1302 : }
1303 :
1304 :
1305 : /* Perform the correspondence test in rule (3) of F08:C1215.
1306 : Returns zero if no argument is found that satisfies this rule,
1307 : nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures
1308 : (if applicable).
1309 :
1310 : This test is also not symmetric in f1 and f2 and must be called
1311 : twice. This test finds problems caused by sorting the actual
1312 : argument list with keywords. For example:
1313 :
1314 : INTERFACE FOO
1315 : SUBROUTINE F1(A, B)
1316 : INTEGER :: A ; REAL :: B
1317 : END SUBROUTINE F1
1318 :
1319 : SUBROUTINE F2(B, A)
1320 : INTEGER :: A ; REAL :: B
1321 : END SUBROUTINE F1
1322 : END INTERFACE FOO
1323 :
1324 : At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */
1325 :
1326 : static bool
1327 34378 : generic_correspondence (gfc_formal_arglist *f1, gfc_formal_arglist *f2,
1328 : const char *p1, const char *p2)
1329 : {
1330 34378 : gfc_formal_arglist *f2_save, *g;
1331 34378 : gfc_symbol *sym;
1332 :
1333 34378 : f2_save = f2;
1334 :
1335 49704 : while (f1)
1336 : {
1337 49654 : if (!f1->sym || f1->sym->attr.optional)
1338 4 : goto next;
1339 :
1340 49650 : if (p1 && strcmp (f1->sym->name, p1) == 0)
1341 7 : f1 = f1->next;
1342 49650 : if (f2 && p2 && strcmp (f2->sym->name, p2) == 0)
1343 5 : f2 = f2->next;
1344 :
1345 49646 : if (f2 != NULL && (compare_type_rank (f1->sym, f2->sym)
1346 34319 : || compare_type_rank (f2->sym, f1->sym))
1347 64980 : && !((gfc_option.allow_std & GFC_STD_F2008)
1348 15330 : && (compare_ptr_alloc(f1->sym, f2->sym)
1349 15323 : || compare_ptr_alloc(f2->sym, f1->sym))))
1350 15318 : goto next;
1351 :
1352 : /* Now search for a disambiguating keyword argument starting at
1353 : the current non-match. */
1354 34332 : for (g = f1; g; g = g->next)
1355 : {
1356 34328 : if (g->sym->attr.optional || (p1 && strcmp (g->sym->name, p1) == 0))
1357 0 : continue;
1358 :
1359 34328 : sym = find_keyword_arg (g->sym->name, f2_save);
1360 34328 : if (sym == NULL || !compare_type_rank (g->sym, sym)
1361 34342 : || ((gfc_option.allow_std & GFC_STD_F2008)
1362 14 : && (compare_ptr_alloc(sym, g->sym)
1363 7 : || compare_ptr_alloc(g->sym, sym))))
1364 34328 : return true;
1365 : }
1366 :
1367 15326 : next:
1368 15326 : if (f1 != NULL)
1369 15322 : f1 = f1->next;
1370 15326 : if (f2 != NULL)
1371 15322 : f2 = f2->next;
1372 : }
1373 :
1374 : return false;
1375 : }
1376 :
1377 :
1378 : int
1379 569729 : gfc_symbol_rank (gfc_symbol *sym)
1380 : {
1381 569729 : gfc_array_spec *as = NULL;
1382 :
1383 569729 : if (sym->ts.type == BT_CLASS && CLASS_DATA (sym))
1384 17115 : as = CLASS_DATA (sym)->as;
1385 : else
1386 552614 : as = sym->as;
1387 :
1388 569729 : return as ? as->rank : 0;
1389 : }
1390 :
1391 :
1392 : /* Check if the characteristics of two dummy arguments match,
1393 : cf. F08:12.3.2. */
1394 :
1395 : bool
1396 126473 : gfc_check_dummy_characteristics (gfc_symbol *s1, gfc_symbol *s2,
1397 : bool type_must_agree, char *errmsg,
1398 : int err_len)
1399 : {
1400 126473 : if (s1 == NULL || s2 == NULL)
1401 27 : return s1 == s2;
1402 :
1403 126446 : if (s1->attr.proc == PROC_ST_FUNCTION || s2->attr.proc == PROC_ST_FUNCTION)
1404 : {
1405 1 : strncpy (errmsg, "Statement function", err_len);
1406 1 : return false;
1407 : }
1408 :
1409 : /* Check type and rank. */
1410 126445 : if (type_must_agree)
1411 : {
1412 125276 : if (!compare_type_characteristics (s1, s2)
1413 125276 : || !compare_type_characteristics (s2, s1))
1414 : {
1415 24 : snprintf (errmsg, err_len, "Type mismatch in argument '%s' (%s/%s)",
1416 : s1->name, gfc_dummy_typename (&s1->ts),
1417 : gfc_dummy_typename (&s2->ts));
1418 24 : return false;
1419 : }
1420 125252 : if (!compare_rank (s1, s2))
1421 : {
1422 5 : snprintf (errmsg, err_len, "Rank mismatch in argument '%s' (%i/%i)",
1423 : s1->name, gfc_symbol_rank (s1), gfc_symbol_rank (s2));
1424 5 : return false;
1425 : }
1426 : }
1427 :
1428 : /* A lot of information is missing for artificially generated
1429 : formal arguments, let's not look into that. */
1430 :
1431 126416 : if (!s1->attr.artificial && !s2->attr.artificial)
1432 : {
1433 : /* Check INTENT. */
1434 100498 : if (s1->attr.intent != s2->attr.intent)
1435 : {
1436 5 : snprintf (errmsg, err_len, "INTENT mismatch in argument '%s'",
1437 : s1->name);
1438 5 : return false;
1439 : }
1440 :
1441 : /* Check OPTIONAL attribute. */
1442 100493 : if (s1->attr.optional != s2->attr.optional)
1443 : {
1444 1 : snprintf (errmsg, err_len, "OPTIONAL mismatch in argument '%s'",
1445 : s1->name);
1446 1 : return false;
1447 : }
1448 :
1449 : /* Check ALLOCATABLE attribute. */
1450 100492 : if (s1->attr.allocatable != s2->attr.allocatable)
1451 : {
1452 0 : snprintf (errmsg, err_len, "ALLOCATABLE mismatch in argument '%s'",
1453 : s1->name);
1454 0 : return false;
1455 : }
1456 :
1457 : /* Check POINTER attribute. */
1458 100492 : if (s1->attr.pointer != s2->attr.pointer)
1459 : {
1460 0 : snprintf (errmsg, err_len, "POINTER mismatch in argument '%s'",
1461 : s1->name);
1462 0 : return false;
1463 : }
1464 :
1465 : /* Check TARGET attribute. */
1466 100492 : if (s1->attr.target != s2->attr.target)
1467 : {
1468 0 : snprintf (errmsg, err_len, "TARGET mismatch in argument '%s'",
1469 : s1->name);
1470 0 : return false;
1471 : }
1472 :
1473 : /* Check ASYNCHRONOUS attribute. */
1474 100492 : if (s1->attr.asynchronous != s2->attr.asynchronous)
1475 : {
1476 1 : snprintf (errmsg, err_len, "ASYNCHRONOUS mismatch in argument '%s'",
1477 : s1->name);
1478 1 : return false;
1479 : }
1480 :
1481 : /* Check CONTIGUOUS attribute. */
1482 100491 : if (s1->attr.contiguous != s2->attr.contiguous)
1483 : {
1484 1 : snprintf (errmsg, err_len, "CONTIGUOUS mismatch in argument '%s'",
1485 : s1->name);
1486 1 : return false;
1487 : }
1488 :
1489 : /* Check VALUE attribute. */
1490 100490 : if (s1->attr.value != s2->attr.value)
1491 : {
1492 1 : snprintf (errmsg, err_len, "VALUE mismatch in argument '%s'",
1493 : s1->name);
1494 1 : return false;
1495 : }
1496 :
1497 : /* Check VOLATILE attribute. */
1498 100489 : if (s1->attr.volatile_ != s2->attr.volatile_)
1499 : {
1500 1 : snprintf (errmsg, err_len, "VOLATILE mismatch in argument '%s'",
1501 : s1->name);
1502 1 : return false;
1503 : }
1504 : }
1505 :
1506 : /* Check interface of dummy procedures. */
1507 126406 : if (s1->attr.flavor == FL_PROCEDURE)
1508 : {
1509 129 : char err[200];
1510 129 : if (!gfc_compare_interfaces (s1, s2, s2->name, 0, 1, err, sizeof(err),
1511 : NULL, NULL))
1512 : {
1513 1 : snprintf (errmsg, err_len, "Interface mismatch in dummy procedure "
1514 : "'%s': %s", s1->name, err);
1515 1 : return false;
1516 : }
1517 : }
1518 :
1519 : /* Check string length. */
1520 126405 : if (s1->ts.type == BT_CHARACTER
1521 2789 : && s1->ts.u.cl && s1->ts.u.cl->length
1522 885 : && s2->ts.u.cl && s2->ts.u.cl->length)
1523 : {
1524 885 : int compval = gfc_dep_compare_expr (s1->ts.u.cl->length,
1525 : s2->ts.u.cl->length);
1526 885 : switch (compval)
1527 : {
1528 0 : case -1:
1529 0 : case 1:
1530 0 : case -3:
1531 0 : snprintf (errmsg, err_len, "Character length mismatch "
1532 : "in argument '%s'", s1->name);
1533 0 : return false;
1534 :
1535 : case -2:
1536 : /* FIXME: Implement a warning for this case.
1537 : gfc_warning (0, "Possible character length mismatch in argument %qs",
1538 : s1->name);*/
1539 : break;
1540 :
1541 : case 0:
1542 : break;
1543 :
1544 0 : default:
1545 0 : gfc_internal_error ("check_dummy_characteristics: Unexpected result "
1546 : "%i of gfc_dep_compare_expr", compval);
1547 : break;
1548 : }
1549 : }
1550 :
1551 : /* Check array shape. */
1552 126405 : if (s1->as && s2->as)
1553 : {
1554 22154 : int i, compval;
1555 22154 : gfc_expr *shape1, *shape2;
1556 :
1557 22154 : if (s1->as->rank != s2->as->rank)
1558 : {
1559 2 : snprintf (errmsg, err_len, "Rank mismatch in argument '%s' (%i/%i)",
1560 : s1->name, s1->as->rank, s2->as->rank);
1561 2 : return false;
1562 : }
1563 :
1564 : /* Sometimes the ambiguity between deferred shape and assumed shape
1565 : does not get resolved in module procedures, where the only explicit
1566 : declaration of the dummy is in the interface. */
1567 22152 : if (s1->ns->proc_name && s1->ns->proc_name->attr.module_procedure
1568 114 : && s1->as->type == AS_ASSUMED_SHAPE
1569 67 : && s2->as->type == AS_DEFERRED)
1570 : {
1571 7 : s2->as->type = AS_ASSUMED_SHAPE;
1572 14 : for (i = 0; i < s2->as->rank; i++)
1573 7 : if (s1->as->lower[i] != NULL)
1574 7 : s2->as->lower[i] = gfc_copy_expr (s1->as->lower[i]);
1575 : }
1576 :
1577 22152 : if (s1->as->type != s2->as->type
1578 4 : && !(s1->as->type == AS_DEFERRED
1579 : && s2->as->type == AS_ASSUMED_SHAPE))
1580 : {
1581 2 : snprintf (errmsg, err_len, "Shape mismatch in argument '%s'",
1582 : s1->name);
1583 2 : return false;
1584 : }
1585 :
1586 22150 : if (s1->as->corank != s2->as->corank)
1587 : {
1588 1 : snprintf (errmsg, err_len, "Corank mismatch in argument '%s' (%i/%i)",
1589 : s1->name, s1->as->corank, s2->as->corank);
1590 1 : return false;
1591 : }
1592 :
1593 22149 : if (s1->as->type == AS_EXPLICIT)
1594 3891 : for (i = 0; i < s1->as->rank + MAX (0, s1->as->corank-1); i++)
1595 : {
1596 2096 : shape1 = gfc_subtract (gfc_copy_expr (s1->as->upper[i]),
1597 2096 : gfc_copy_expr (s1->as->lower[i]));
1598 2096 : shape2 = gfc_subtract (gfc_copy_expr (s2->as->upper[i]),
1599 2096 : gfc_copy_expr (s2->as->lower[i]));
1600 2096 : compval = gfc_dep_compare_expr (shape1, shape2);
1601 2096 : gfc_free_expr (shape1);
1602 2096 : gfc_free_expr (shape2);
1603 2096 : switch (compval)
1604 : {
1605 2 : case -1:
1606 2 : case 1:
1607 2 : case -3:
1608 2 : if (i < s1->as->rank)
1609 2 : snprintf (errmsg, err_len, "Shape mismatch in dimension %i of"
1610 : " argument '%s'", i + 1, s1->name);
1611 : else
1612 0 : snprintf (errmsg, err_len, "Shape mismatch in codimension %i "
1613 0 : "of argument '%s'", i - s1->as->rank + 1, s1->name);
1614 2 : return false;
1615 :
1616 : case -2:
1617 : /* FIXME: Implement a warning for this case.
1618 : gfc_warning (0, "Possible shape mismatch in argument %qs",
1619 : s1->name);*/
1620 : break;
1621 :
1622 : case 0:
1623 : break;
1624 :
1625 0 : default:
1626 0 : gfc_internal_error ("check_dummy_characteristics: Unexpected "
1627 : "result %i of gfc_dep_compare_expr",
1628 : compval);
1629 2094 : break;
1630 : }
1631 : }
1632 : }
1633 :
1634 : return true;
1635 : }
1636 :
1637 :
1638 : /* Check if the characteristics of two function results match,
1639 : cf. F08:12.3.3. */
1640 :
1641 : bool
1642 59349 : gfc_check_result_characteristics (gfc_symbol *s1, gfc_symbol *s2,
1643 : char *errmsg, int err_len)
1644 : {
1645 59349 : gfc_symbol *r1, *r2;
1646 :
1647 59349 : if (s1->ts.interface && s1->ts.interface->result)
1648 : r1 = s1->ts.interface->result;
1649 : else
1650 58878 : r1 = s1->result ? s1->result : s1;
1651 :
1652 59349 : if (s2->ts.interface && s2->ts.interface->result)
1653 : r2 = s2->ts.interface->result;
1654 : else
1655 58880 : r2 = s2->result ? s2->result : s2;
1656 :
1657 59349 : if (r1->ts.type == BT_UNKNOWN)
1658 : return true;
1659 :
1660 : /* Check type and rank. */
1661 59081 : if (!compare_type_characteristics (r1, r2))
1662 : {
1663 21 : snprintf (errmsg, err_len, "Type mismatch in function result (%s/%s)",
1664 : gfc_typename (&r1->ts), gfc_typename (&r2->ts));
1665 21 : return false;
1666 : }
1667 59060 : if (!compare_rank (r1, r2))
1668 : {
1669 5 : snprintf (errmsg, err_len, "Rank mismatch in function result (%i/%i)",
1670 : gfc_symbol_rank (r1), gfc_symbol_rank (r2));
1671 5 : return false;
1672 : }
1673 :
1674 : /* Check ALLOCATABLE attribute. */
1675 59055 : if (r1->attr.allocatable != r2->attr.allocatable)
1676 : {
1677 2 : snprintf (errmsg, err_len, "ALLOCATABLE attribute mismatch in "
1678 : "function result");
1679 2 : return false;
1680 : }
1681 :
1682 : /* Check POINTER attribute. */
1683 59053 : if (r1->attr.pointer != r2->attr.pointer)
1684 : {
1685 2 : snprintf (errmsg, err_len, "POINTER attribute mismatch in "
1686 : "function result");
1687 2 : return false;
1688 : }
1689 :
1690 : /* Check CONTIGUOUS attribute. */
1691 59051 : if (r1->attr.contiguous != r2->attr.contiguous)
1692 : {
1693 1 : snprintf (errmsg, err_len, "CONTIGUOUS attribute mismatch in "
1694 : "function result");
1695 1 : return false;
1696 : }
1697 :
1698 : /* Check PROCEDURE POINTER attribute. */
1699 59050 : if (r1 != s1 && r1->attr.proc_pointer != r2->attr.proc_pointer)
1700 : {
1701 3 : snprintf (errmsg, err_len, "PROCEDURE POINTER mismatch in "
1702 : "function result");
1703 3 : return false;
1704 : }
1705 :
1706 : /* Check string length. */
1707 59047 : if (r1->ts.type == BT_CHARACTER && r1->ts.u.cl && r2->ts.u.cl)
1708 : {
1709 2211 : if (r1->ts.deferred != r2->ts.deferred)
1710 : {
1711 0 : snprintf (errmsg, err_len, "Character length mismatch "
1712 : "in function result");
1713 0 : return false;
1714 : }
1715 :
1716 2211 : if (r1->ts.u.cl->length && r2->ts.u.cl->length)
1717 : {
1718 1647 : int compval = gfc_dep_compare_expr (r1->ts.u.cl->length,
1719 : r2->ts.u.cl->length);
1720 1647 : switch (compval)
1721 : {
1722 3 : case -1:
1723 3 : case 1:
1724 3 : case -3:
1725 3 : snprintf (errmsg, err_len, "Character length mismatch "
1726 : "in function result");
1727 3 : return false;
1728 :
1729 75 : case -2:
1730 75 : if (r1->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1731 : {
1732 0 : snprintf (errmsg, err_len,
1733 : "Function declared with a non-constant character "
1734 : "length referenced with a constant length");
1735 0 : return false;
1736 : }
1737 75 : else if (r2->ts.u.cl->length->expr_type == EXPR_CONSTANT)
1738 : {
1739 3 : snprintf (errmsg, err_len,
1740 : "Function declared with a constant character "
1741 : "length referenced with a non-constant length");
1742 3 : return false;
1743 : }
1744 : /* Warn if length expression types are different, except for
1745 : possibly false positives where complex expressions might have
1746 : been used. */
1747 72 : else if ((r1->ts.u.cl->length->expr_type
1748 : != r2->ts.u.cl->length->expr_type)
1749 4 : && (r1->ts.u.cl->length->expr_type != EXPR_OP
1750 2 : || r2->ts.u.cl->length->expr_type != EXPR_OP))
1751 4 : gfc_warning (0, "Possible character length mismatch in "
1752 : "function result between %L and %L",
1753 : &r1->declared_at, &r2->declared_at);
1754 : break;
1755 :
1756 : case 0:
1757 : break;
1758 :
1759 0 : default:
1760 0 : gfc_internal_error ("check_result_characteristics (1): Unexpected "
1761 : "result %i of gfc_dep_compare_expr", compval);
1762 : break;
1763 : }
1764 : }
1765 : }
1766 :
1767 : /* Check array shape. */
1768 59041 : if (!r1->attr.allocatable && !r1->attr.pointer && r1->as && r2->as)
1769 : {
1770 989 : int i, compval;
1771 989 : gfc_expr *shape1, *shape2;
1772 :
1773 989 : if (r1->as->type != r2->as->type)
1774 : {
1775 0 : snprintf (errmsg, err_len, "Shape mismatch in function result");
1776 0 : return false;
1777 : }
1778 :
1779 989 : if (r1->as->type == AS_EXPLICIT)
1780 2493 : for (i = 0; i < r1->as->rank + r1->as->corank; i++)
1781 : {
1782 1505 : shape1 = gfc_subtract (gfc_copy_expr (r1->as->upper[i]),
1783 1505 : gfc_copy_expr (r1->as->lower[i]));
1784 1505 : shape2 = gfc_subtract (gfc_copy_expr (r2->as->upper[i]),
1785 1505 : gfc_copy_expr (r2->as->lower[i]));
1786 1505 : compval = gfc_dep_compare_expr (shape1, shape2);
1787 1505 : gfc_free_expr (shape1);
1788 1505 : gfc_free_expr (shape2);
1789 1505 : switch (compval)
1790 : {
1791 1 : case -1:
1792 1 : case 1:
1793 1 : case -3:
1794 1 : snprintf (errmsg, err_len, "Shape mismatch in dimension %i of "
1795 : "function result", i + 1);
1796 1 : return false;
1797 :
1798 : case -2:
1799 : /* FIXME: Implement a warning for this case.
1800 : gfc_warning (0, "Possible shape mismatch in return value");*/
1801 : break;
1802 :
1803 : case 0:
1804 : break;
1805 :
1806 0 : default:
1807 0 : gfc_internal_error ("check_result_characteristics (2): "
1808 : "Unexpected result %i of "
1809 : "gfc_dep_compare_expr", compval);
1810 1504 : break;
1811 : }
1812 : }
1813 : }
1814 :
1815 : return true;
1816 : }
1817 :
1818 :
1819 : /* 'Compare' two formal interfaces associated with a pair of symbols.
1820 : We return true if there exists an actual argument list that
1821 : would be ambiguous between the two interfaces, zero otherwise.
1822 : 'strict_flag' specifies whether all the characteristics are
1823 : required to match, which is not the case for ambiguity checks.
1824 : 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */
1825 :
1826 : bool
1827 895074 : gfc_compare_interfaces (gfc_symbol *s1, gfc_symbol *s2, const char *name2,
1828 : int generic_flag, int strict_flag,
1829 : char *errmsg, int err_len,
1830 : const char *p1, const char *p2,
1831 : bool *bad_result_characteristics)
1832 : {
1833 895074 : gfc_formal_arglist *f1, *f2;
1834 :
1835 895074 : gcc_assert (name2 != NULL);
1836 :
1837 895074 : if (bad_result_characteristics)
1838 14947 : *bad_result_characteristics = false;
1839 :
1840 895074 : if (s1->attr.function && (s2->attr.subroutine
1841 797178 : || (!s2->attr.function && s2->ts.type == BT_UNKNOWN
1842 5 : && gfc_get_default_type (name2, s2->ns)->type == BT_UNKNOWN)))
1843 : {
1844 3 : if (errmsg != NULL)
1845 3 : snprintf (errmsg, err_len, "'%s' is not a function", name2);
1846 3 : return false;
1847 : }
1848 :
1849 895071 : if (s1->attr.subroutine && s2->attr.function)
1850 : {
1851 6 : if (errmsg != NULL)
1852 6 : snprintf (errmsg, err_len, "'%s' is not a subroutine", name2);
1853 6 : return false;
1854 : }
1855 :
1856 895065 : if (s2->attr.subroutine && s1->attr.flavor == FL_VARIABLE)
1857 : {
1858 2 : if (errmsg != NULL)
1859 2 : snprintf (errmsg, err_len, "subroutine proc pointer '%s' passed "
1860 : "to dummy variable '%s'", name2, s1->name);
1861 2 : return false;
1862 : }
1863 :
1864 : /* Do strict checks on all characteristics
1865 : (for dummy procedures and procedure pointer assignments). */
1866 895063 : if (!generic_flag && strict_flag)
1867 : {
1868 63460 : if (s1->attr.function && s2->attr.function)
1869 : {
1870 : /* If both are functions, check result characteristics. */
1871 29130 : if (!gfc_check_result_characteristics (s1, s2, errmsg, err_len)
1872 29130 : || !gfc_check_result_characteristics (s2, s1, errmsg, err_len))
1873 : {
1874 30 : if (bad_result_characteristics)
1875 6 : *bad_result_characteristics = true;
1876 30 : return false;
1877 : }
1878 : }
1879 :
1880 63430 : if (s1->attr.pure && !s2->attr.pure)
1881 : {
1882 2 : snprintf (errmsg, err_len, "Mismatch in PURE attribute");
1883 2 : return false;
1884 : }
1885 63428 : if (s1->attr.elemental && !s2->attr.elemental)
1886 : {
1887 0 : snprintf (errmsg, err_len, "Mismatch in ELEMENTAL attribute");
1888 0 : return false;
1889 : }
1890 : }
1891 :
1892 895031 : if (s1->attr.if_source == IFSRC_UNKNOWN
1893 879370 : || s2->attr.if_source == IFSRC_UNKNOWN)
1894 : return true;
1895 :
1896 879294 : f1 = gfc_sym_get_dummy_args (s1);
1897 879294 : f2 = gfc_sym_get_dummy_args (s2);
1898 :
1899 : /* Special case: No arguments. */
1900 879294 : if (f1 == NULL && f2 == NULL)
1901 : return true;
1902 :
1903 877203 : if (generic_flag)
1904 : {
1905 828608 : if (count_types_test (f1, f2, p1, p2)
1906 828608 : || count_types_test (f2, f1, p2, p1))
1907 794252 : return false;
1908 :
1909 : /* Special case: alternate returns. If both f1->sym and f2->sym are
1910 : NULL, then the leading formal arguments are alternate returns.
1911 : The previous conditional should catch argument lists with
1912 : different number of argument. */
1913 34356 : if (f1 && f1->sym == NULL && f2 && f2->sym == NULL)
1914 : return true;
1915 :
1916 34353 : if (generic_correspondence (f1, f2, p1, p2)
1917 34353 : || generic_correspondence (f2, f1, p2, p1))
1918 34328 : return false;
1919 : }
1920 : else
1921 : /* Perform the abbreviated correspondence test for operators (the
1922 : arguments cannot be optional and are always ordered correctly).
1923 : This is also done when comparing interfaces for dummy procedures and in
1924 : procedure pointer assignments. */
1925 :
1926 172889 : for (; f1 || f2; f1 = f1->next, f2 = f2->next)
1927 : {
1928 : /* Check existence. */
1929 127325 : if (f1 == NULL || f2 == NULL)
1930 : {
1931 10 : if (errmsg != NULL)
1932 6 : snprintf (errmsg, err_len, "'%s' has the wrong number of "
1933 : "arguments", name2);
1934 10 : return false;
1935 : }
1936 :
1937 127315 : if (strict_flag)
1938 : {
1939 : /* Check all characteristics. */
1940 124008 : if (!gfc_check_dummy_characteristics (f1->sym, f2->sym, true,
1941 : errmsg, err_len))
1942 : return false;
1943 : }
1944 : else
1945 : {
1946 : /* Operators: Only check type and rank of arguments. */
1947 3307 : if (!compare_type (f2->sym, f1->sym))
1948 : {
1949 2975 : if (errmsg != NULL)
1950 0 : snprintf (errmsg, err_len, "Type mismatch in argument '%s' "
1951 0 : "(%s/%s)", f1->sym->name,
1952 0 : gfc_typename (&f1->sym->ts),
1953 0 : gfc_typename (&f2->sym->ts));
1954 2975 : return false;
1955 : }
1956 332 : if (!compare_rank (f2->sym, f1->sym))
1957 : {
1958 4 : if (errmsg != NULL)
1959 0 : snprintf (errmsg, err_len, "Rank mismatch in argument "
1960 0 : "'%s' (%i/%i)", f1->sym->name,
1961 0 : gfc_symbol_rank (f1->sym), gfc_symbol_rank (f2->sym));
1962 4 : return false;
1963 : }
1964 328 : if ((gfc_option.allow_std & GFC_STD_F2008)
1965 328 : && (compare_ptr_alloc(f1->sym, f2->sym)
1966 327 : || compare_ptr_alloc(f2->sym, f1->sym)))
1967 : {
1968 2 : if (errmsg != NULL)
1969 0 : snprintf (errmsg, err_len, "Mismatching POINTER/ALLOCATABLE "
1970 : "attribute in argument '%s' ", f1->sym->name);
1971 2 : return false;
1972 : }
1973 : }
1974 : }
1975 :
1976 : return true;
1977 : }
1978 :
1979 :
1980 : /* Given a pointer to an interface pointer, remove duplicate
1981 : interfaces and make sure that all symbols are either functions
1982 : or subroutines, and all of the same kind. Returns true if
1983 : something goes wrong. */
1984 :
1985 : static bool
1986 9817211 : check_interface0 (gfc_interface *p, const char *interface_name)
1987 : {
1988 9817211 : gfc_interface *psave, *q, *qlast;
1989 :
1990 9817211 : psave = p;
1991 10022154 : for (; p; p = p->next)
1992 : {
1993 : /* Make sure all symbols in the interface have been defined as
1994 : functions or subroutines. */
1995 204959 : if (((!p->sym->attr.function && !p->sym->attr.subroutine)
1996 168216 : || !p->sym->attr.if_source)
1997 36746 : && !gfc_fl_struct (p->sym->attr.flavor))
1998 : {
1999 12 : const char *guessed
2000 12 : = gfc_lookup_function_fuzzy (p->sym->name, p->sym->ns->sym_root);
2001 :
2002 12 : if (p->sym->attr.external)
2003 5 : if (guessed)
2004 5 : gfc_error ("Procedure %qs in %s at %L has no explicit interface"
2005 : "; did you mean %qs?",
2006 : p->sym->name, interface_name, &p->sym->declared_at,
2007 : guessed);
2008 : else
2009 0 : gfc_error ("Procedure %qs in %s at %L has no explicit interface",
2010 : p->sym->name, interface_name, &p->sym->declared_at);
2011 : else
2012 7 : if (guessed)
2013 4 : gfc_error ("Procedure %qs in %s at %L is neither function nor "
2014 : "subroutine; did you mean %qs?", p->sym->name,
2015 : interface_name, &p->sym->declared_at, guessed);
2016 : else
2017 3 : gfc_error ("Procedure %qs in %s at %L is neither function nor "
2018 : "subroutine", p->sym->name, interface_name,
2019 : &p->sym->declared_at);
2020 12 : return true;
2021 : }
2022 :
2023 : /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */
2024 204947 : if ((psave->sym->attr.function && !p->sym->attr.function
2025 282 : && !gfc_fl_struct (p->sym->attr.flavor))
2026 204945 : || (psave->sym->attr.subroutine && !p->sym->attr.subroutine))
2027 : {
2028 3 : if (!gfc_fl_struct (p->sym->attr.flavor))
2029 3 : gfc_error ("In %s at %L procedures must be either all SUBROUTINEs"
2030 : " or all FUNCTIONs", interface_name,
2031 : &p->sym->declared_at);
2032 0 : else if (p->sym->attr.flavor == FL_DERIVED)
2033 0 : gfc_error ("In %s at %L procedures must be all FUNCTIONs as the "
2034 : "generic name is also the name of a derived type",
2035 : interface_name, &p->sym->declared_at);
2036 3 : return true;
2037 : }
2038 :
2039 : /* F2003, C1207. F2008, C1207. */
2040 204944 : if (p->sym->attr.proc == PROC_INTERNAL
2041 204944 : && !gfc_notify_std (GFC_STD_F2008, "Internal procedure "
2042 : "%qs in %s at %L", p->sym->name,
2043 : interface_name, &p->sym->declared_at))
2044 : return true;
2045 : }
2046 : p = psave;
2047 :
2048 : /* Remove duplicate interfaces in this interface list. */
2049 10017090 : for (; p; p = p->next)
2050 : {
2051 199895 : qlast = p;
2052 :
2053 632205 : for (q = p->next; q;)
2054 : {
2055 432310 : if (p->sym != q->sym)
2056 : {
2057 427266 : qlast = q;
2058 427266 : q = q->next;
2059 : }
2060 : else
2061 : {
2062 : /* Duplicate interface. */
2063 5044 : qlast->next = q->next;
2064 5044 : free (q);
2065 5044 : q = qlast->next;
2066 : }
2067 : }
2068 : }
2069 :
2070 : return false;
2071 : }
2072 :
2073 :
2074 : /* Check lists of interfaces to make sure that no two interfaces are
2075 : ambiguous. Duplicate interfaces (from the same symbol) are OK here. */
2076 :
2077 : static bool
2078 17708926 : check_interface1 (gfc_interface *p, gfc_interface *q0,
2079 : int generic_flag, const char *interface_name,
2080 : bool referenced)
2081 : {
2082 17708926 : gfc_interface *q;
2083 17912024 : for (; p; p = p->next)
2084 1234578 : for (q = q0; q; q = q->next)
2085 : {
2086 1031480 : if (p->sym == q->sym)
2087 199857 : continue; /* Duplicates OK here. */
2088 :
2089 831623 : if (p->sym->name == q->sym->name && p->sym->module == q->sym->module)
2090 128 : continue;
2091 :
2092 831495 : if (!gfc_fl_struct (p->sym->attr.flavor)
2093 831173 : && !gfc_fl_struct (q->sym->attr.flavor)
2094 830855 : && gfc_compare_interfaces (p->sym, q->sym, q->sym->name,
2095 : generic_flag, 0, NULL, 0, NULL, NULL))
2096 : {
2097 30 : if (referenced)
2098 27 : gfc_error ("Ambiguous interfaces in %s for %qs at %L "
2099 : "and %qs at %L", interface_name,
2100 27 : q->sym->name, &q->sym->declared_at,
2101 27 : p->sym->name, &p->sym->declared_at);
2102 3 : else if (!p->sym->attr.use_assoc && q->sym->attr.use_assoc)
2103 1 : gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L "
2104 : "and %qs at %L", interface_name,
2105 : q->sym->name, &q->sym->declared_at,
2106 : p->sym->name, &p->sym->declared_at);
2107 : else
2108 2 : gfc_warning (0, "Although not referenced, %qs has ambiguous "
2109 : "interfaces at %L", interface_name, &p->where);
2110 30 : return true;
2111 : }
2112 : }
2113 : return false;
2114 : }
2115 :
2116 :
2117 : /* Check the generic and operator interfaces of symbols to make sure
2118 : that none of the interfaces conflict. The check has to be done
2119 : after all of the symbols are actually loaded. */
2120 :
2121 : static void
2122 1939251 : check_sym_interfaces (gfc_symbol *sym)
2123 : {
2124 : /* Provide sufficient space to hold "generic interface 'symbol.symbol'". */
2125 1939251 : char interface_name[2*GFC_MAX_SYMBOL_LEN+2 + sizeof("generic interface ''")];
2126 1939251 : gfc_interface *p;
2127 :
2128 1939251 : if (sym->ns != gfc_current_ns)
2129 61664 : return;
2130 :
2131 1877605 : if (sym->generic != NULL)
2132 : {
2133 84369 : size_t len = strlen (sym->name) + sizeof("generic interface ''");
2134 84369 : gcc_assert (len < sizeof (interface_name));
2135 84369 : sprintf (interface_name, "generic interface '%s'", sym->name);
2136 84369 : if (check_interface0 (sym->generic, interface_name))
2137 : return;
2138 :
2139 280269 : for (p = sym->generic; p; p = p->next)
2140 : {
2141 195918 : if (p->sym->attr.mod_proc
2142 1218 : && !p->sym->attr.module_procedure
2143 1212 : && (p->sym->attr.if_source != IFSRC_DECL
2144 1208 : || p->sym->attr.procedure))
2145 : {
2146 4 : gfc_error ("%qs at %L is not a module procedure",
2147 : p->sym->name, &p->where);
2148 4 : return;
2149 : }
2150 : }
2151 :
2152 : /* Originally, this test was applied to host interfaces too;
2153 : this is incorrect since host associated symbols, from any
2154 : source, cannot be ambiguous with local symbols. */
2155 84351 : check_interface1 (sym->generic, sym->generic, 1, interface_name,
2156 84351 : sym->attr.referenced || !sym->attr.use_assoc);
2157 : }
2158 : }
2159 :
2160 :
2161 : static void
2162 403 : check_uop_interfaces (gfc_user_op *uop)
2163 : {
2164 403 : char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("operator interface ''")];
2165 403 : gfc_user_op *uop2;
2166 403 : gfc_namespace *ns;
2167 :
2168 403 : sprintf (interface_name, "operator interface '%s'", uop->name);
2169 403 : if (check_interface0 (uop->op, interface_name))
2170 2 : return;
2171 :
2172 840 : for (ns = gfc_current_ns; ns; ns = ns->parent)
2173 : {
2174 439 : uop2 = gfc_find_uop (uop->name, ns);
2175 439 : if (uop2 == NULL)
2176 22 : continue;
2177 :
2178 417 : check_interface1 (uop->op, uop2->op, 0,
2179 : interface_name, true);
2180 : }
2181 : }
2182 :
2183 : /* Given an intrinsic op, return an equivalent op if one exists,
2184 : or INTRINSIC_NONE otherwise. */
2185 :
2186 : gfc_intrinsic_op
2187 12201415 : gfc_equivalent_op (gfc_intrinsic_op op)
2188 : {
2189 12201415 : switch(op)
2190 : {
2191 : case INTRINSIC_EQ:
2192 : return INTRINSIC_EQ_OS;
2193 :
2194 : case INTRINSIC_EQ_OS:
2195 : return INTRINSIC_EQ;
2196 :
2197 : case INTRINSIC_NE:
2198 : return INTRINSIC_NE_OS;
2199 :
2200 : case INTRINSIC_NE_OS:
2201 : return INTRINSIC_NE;
2202 :
2203 : case INTRINSIC_GT:
2204 : return INTRINSIC_GT_OS;
2205 :
2206 : case INTRINSIC_GT_OS:
2207 : return INTRINSIC_GT;
2208 :
2209 : case INTRINSIC_GE:
2210 : return INTRINSIC_GE_OS;
2211 :
2212 : case INTRINSIC_GE_OS:
2213 : return INTRINSIC_GE;
2214 :
2215 : case INTRINSIC_LT:
2216 : return INTRINSIC_LT_OS;
2217 :
2218 : case INTRINSIC_LT_OS:
2219 : return INTRINSIC_LT;
2220 :
2221 : case INTRINSIC_LE:
2222 : return INTRINSIC_LE_OS;
2223 :
2224 : case INTRINSIC_LE_OS:
2225 : return INTRINSIC_LE;
2226 :
2227 : default:
2228 : return INTRINSIC_NONE;
2229 : }
2230 : }
2231 :
2232 : /* For the namespace, check generic, user operator and intrinsic
2233 : operator interfaces for consistency and to remove duplicate
2234 : interfaces. We traverse the whole namespace, counting on the fact
2235 : that most symbols will not have generic or operator interfaces. */
2236 :
2237 : void
2238 360463 : gfc_check_interfaces (gfc_namespace *ns)
2239 : {
2240 360463 : gfc_namespace *old_ns, *ns2;
2241 360463 : char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("intrinsic '' operator")];
2242 360463 : int i;
2243 :
2244 360463 : old_ns = gfc_current_ns;
2245 360463 : gfc_current_ns = ns;
2246 :
2247 360463 : gfc_traverse_ns (ns, check_sym_interfaces);
2248 :
2249 360463 : gfc_traverse_user_op (ns, check_uop_interfaces);
2250 :
2251 10453359 : for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++)
2252 : {
2253 10092899 : if (i == INTRINSIC_USER)
2254 360460 : continue;
2255 :
2256 9732439 : if (i == INTRINSIC_ASSIGN)
2257 360460 : strcpy (interface_name, "intrinsic assignment operator");
2258 : else
2259 9371979 : sprintf (interface_name, "intrinsic '%s' operator",
2260 : gfc_op2string ((gfc_intrinsic_op) i));
2261 :
2262 9732439 : if (check_interface0 (ns->op[i], interface_name))
2263 0 : continue;
2264 :
2265 9732439 : if (ns->op[i])
2266 2472 : gfc_check_operator_interface (ns->op[i]->sym, (gfc_intrinsic_op) i,
2267 : ns->op[i]->where);
2268 :
2269 21933782 : for (ns2 = ns; ns2; ns2 = ns2->parent)
2270 : {
2271 12201346 : gfc_intrinsic_op other_op;
2272 :
2273 12201346 : if (check_interface1 (ns->op[i], ns2->op[i], 0,
2274 : interface_name, true))
2275 3 : goto done;
2276 :
2277 : /* i should be gfc_intrinsic_op, but has to be int with this cast
2278 : here for stupid C++ compatibility rules. */
2279 12201343 : other_op = gfc_equivalent_op ((gfc_intrinsic_op) i);
2280 12201343 : if (other_op != INTRINSIC_NONE
2281 12201343 : && check_interface1 (ns->op[i], ns2->op[other_op],
2282 : 0, interface_name, true))
2283 0 : goto done;
2284 : }
2285 : }
2286 :
2287 360460 : done:
2288 360463 : gfc_current_ns = old_ns;
2289 360463 : }
2290 :
2291 :
2292 : /* Given a symbol of a formal argument list and an expression, if the
2293 : formal argument is allocatable, check that the actual argument is
2294 : allocatable. Returns true if compatible, zero if not compatible. */
2295 :
2296 : static bool
2297 257822 : compare_allocatable (gfc_symbol *formal, gfc_expr *actual)
2298 : {
2299 257822 : if (formal->attr.allocatable
2300 254712 : || (formal->ts.type == BT_CLASS && CLASS_DATA (formal)->attr.allocatable))
2301 : {
2302 3996 : symbol_attribute attr = gfc_expr_attr (actual);
2303 3996 : if (actual->ts.type == BT_CLASS && !attr.class_ok)
2304 23 : return true;
2305 3982 : else if (!attr.allocatable)
2306 : return false;
2307 : }
2308 :
2309 : return true;
2310 : }
2311 :
2312 :
2313 : /* Given a symbol of a formal argument list and an expression, if the
2314 : formal argument is a pointer, see if the actual argument is a
2315 : pointer. Returns nonzero if compatible, zero if not compatible. */
2316 :
2317 : static int
2318 257843 : compare_pointer (gfc_symbol *formal, gfc_expr *actual)
2319 : {
2320 257843 : symbol_attribute attr;
2321 :
2322 257843 : if (formal->attr.pointer
2323 253040 : || (formal->ts.type == BT_CLASS && CLASS_DATA (formal)
2324 14250 : && CLASS_DATA (formal)->attr.class_pointer))
2325 : {
2326 5743 : attr = gfc_expr_attr (actual);
2327 :
2328 : /* Fortran 2008 allows non-pointer actual arguments. */
2329 5743 : if (!attr.pointer && attr.target && formal->attr.intent == INTENT_IN)
2330 : return 2;
2331 :
2332 5356 : if (!attr.pointer)
2333 : return 0;
2334 : }
2335 :
2336 : return 1;
2337 : }
2338 :
2339 :
2340 : /* Emit clear error messages for rank mismatch. */
2341 :
2342 : static void
2343 153 : argument_rank_mismatch (const char *name, locus *where,
2344 : int rank1, int rank2, locus *where_formal)
2345 : {
2346 :
2347 : /* TS 29113, C407b. */
2348 153 : if (where_formal == NULL)
2349 : {
2350 143 : if (rank2 == -1)
2351 10 : gfc_error ("The assumed-rank array at %L requires that the dummy "
2352 : "argument %qs has assumed-rank", where, name);
2353 133 : else if (rank1 == 0)
2354 22 : gfc_error_opt (0, "Rank mismatch in argument %qs "
2355 : "at %L (scalar and rank-%d)", name, where, rank2);
2356 111 : else if (rank2 == 0)
2357 104 : gfc_error_opt (0, "Rank mismatch in argument %qs "
2358 : "at %L (rank-%d and scalar)", name, where, rank1);
2359 : else
2360 7 : gfc_error_opt (0, "Rank mismatch in argument %qs "
2361 : "at %L (rank-%d and rank-%d)", name, where, rank1,
2362 : rank2);
2363 : }
2364 : else
2365 : {
2366 10 : if (rank2 == -1)
2367 : /* This is an assumed rank-actual passed to a function without
2368 : an explicit interface, which is already diagnosed in
2369 : gfc_procedure_use. */
2370 : return;
2371 8 : if (rank1 == 0)
2372 6 : gfc_error_opt (0, "Rank mismatch between actual argument at %L "
2373 : "and actual argument at %L (scalar and rank-%d)",
2374 : where, where_formal, rank2);
2375 2 : else if (rank2 == 0)
2376 2 : gfc_error_opt (0, "Rank mismatch between actual argument at %L "
2377 : "and actual argument at %L (rank-%d and scalar)",
2378 : where, where_formal, rank1);
2379 : else
2380 0 : gfc_error_opt (0, "Rank mismatch between actual argument at %L "
2381 : "and actual argument at %L (rank-%d and rank-%d)", where,
2382 : where_formal, rank1, rank2);
2383 : }
2384 : }
2385 :
2386 :
2387 : /* Under certain conditions, a scalar actual argument can be passed
2388 : to an array dummy argument - see F2018, 15.5.2.4, paragraph 14.
2389 : This function returns true for these conditions so that an error
2390 : or warning for this can be suppressed later. Always return false
2391 : for expressions with rank > 0. */
2392 :
2393 : bool
2394 3069 : maybe_dummy_array_arg (gfc_expr *e)
2395 : {
2396 3069 : gfc_symbol *s;
2397 3069 : gfc_ref *ref;
2398 3069 : bool array_pointer = false;
2399 3069 : bool assumed_shape = false;
2400 3069 : bool scalar_ref = true;
2401 :
2402 3069 : if (e->rank > 0)
2403 : return false;
2404 :
2405 3063 : if (e->ts.type == BT_CHARACTER && e->ts.kind == 1)
2406 : return true;
2407 :
2408 : /* If this comes from a constructor, it has been an array element
2409 : originally. */
2410 :
2411 2914 : if (e->expr_type == EXPR_CONSTANT)
2412 687 : return e->from_constructor;
2413 :
2414 2227 : if (e->expr_type != EXPR_VARIABLE)
2415 : return false;
2416 :
2417 2119 : s = e->symtree->n.sym;
2418 :
2419 2119 : if (s->attr.dimension)
2420 : {
2421 235 : scalar_ref = false;
2422 235 : array_pointer = s->attr.pointer;
2423 : }
2424 :
2425 2119 : if (s->as && s->as->type == AS_ASSUMED_SHAPE)
2426 2119 : assumed_shape = true;
2427 :
2428 2383 : for (ref=e->ref; ref; ref=ref->next)
2429 : {
2430 264 : if (ref->type == REF_COMPONENT)
2431 : {
2432 20 : symbol_attribute *attr;
2433 20 : attr = &ref->u.c.component->attr;
2434 20 : if (attr->dimension)
2435 : {
2436 2 : array_pointer = attr->pointer;
2437 2 : assumed_shape = false;
2438 2 : scalar_ref = false;
2439 : }
2440 : else
2441 : scalar_ref = true;
2442 : }
2443 : }
2444 :
2445 2119 : return !(scalar_ref || array_pointer || assumed_shape);
2446 : }
2447 :
2448 : /* Given a symbol of a formal argument list and an expression, see if
2449 : the two are compatible as arguments. Returns true if
2450 : compatible, false if not compatible. */
2451 :
2452 : static bool
2453 365026 : compare_parameter (gfc_symbol *formal, gfc_expr *actual,
2454 : int ranks_must_agree, int is_elemental, locus *where)
2455 : {
2456 365026 : gfc_ref *ref;
2457 365026 : bool rank_check, is_pointer;
2458 365026 : char err[200];
2459 365026 : gfc_component *ppc;
2460 365026 : bool codimension = false;
2461 365026 : gfc_array_spec *formal_as;
2462 365026 : const char *actual_name;
2463 :
2464 : /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding
2465 : procs c_f_pointer or c_f_procpointer, and we need to accept most
2466 : pointers the user could give us. This should allow that. */
2467 365026 : if (formal->ts.type == BT_VOID)
2468 : return true;
2469 :
2470 365026 : if (formal->ts.type == BT_DERIVED
2471 29932 : && formal->ts.u.derived && formal->ts.u.derived->ts.is_iso_c
2472 4414 : && actual->ts.type == BT_DERIVED
2473 4404 : && actual->ts.u.derived && actual->ts.u.derived->ts.is_iso_c)
2474 : {
2475 4404 : if (formal->ts.u.derived->intmod_sym_id
2476 4404 : != actual->ts.u.derived->intmod_sym_id)
2477 : return false;
2478 :
2479 4303 : if (ranks_must_agree
2480 136 : && gfc_symbol_rank (formal) != actual->rank
2481 4363 : && gfc_symbol_rank (formal) != -1)
2482 : {
2483 42 : if (where)
2484 0 : argument_rank_mismatch (formal->name, &actual->where,
2485 : gfc_symbol_rank (formal), actual->rank,
2486 : NULL);
2487 42 : return false;
2488 : }
2489 4261 : return true;
2490 : }
2491 :
2492 360622 : if (formal->ts.type == BT_CLASS && actual->ts.type == BT_DERIVED)
2493 : /* Make sure the vtab symbol is present when
2494 : the module variables are generated. */
2495 7439 : gfc_find_derived_vtab (actual->ts.u.derived);
2496 :
2497 360622 : if (actual->ts.type == BT_PROCEDURE)
2498 : {
2499 1991 : gfc_symbol *act_sym = actual->symtree->n.sym;
2500 :
2501 1991 : if (formal->attr.flavor != FL_PROCEDURE && !act_sym->ts.interface)
2502 : {
2503 4 : if (where)
2504 2 : gfc_error ("Invalid procedure argument at %L", &actual->where);
2505 4 : return false;
2506 : }
2507 1987 : else if (act_sym->ts.interface
2508 1987 : && !gfc_compare_interfaces (formal, act_sym->ts.interface,
2509 : act_sym->name, 0, 1, err,
2510 : sizeof(err),NULL, NULL))
2511 : {
2512 1 : if (where)
2513 : {
2514 : /* Artificially generated symbol names would only confuse. */
2515 1 : if (formal->attr.artificial)
2516 0 : gfc_error_opt (0, "Interface mismatch in dummy procedure "
2517 : "at %L conflicts with %L: %s", &actual->where,
2518 : &formal->declared_at, err);
2519 : else
2520 1 : gfc_error_opt (0, "Interface mismatch in dummy procedure %qs "
2521 : "at %L: %s", formal->name, &actual->where, err);
2522 : }
2523 1 : return false;
2524 : }
2525 :
2526 1986 : if (!gfc_compare_interfaces (formal, act_sym, act_sym->name, 0, 1, err,
2527 : sizeof(err), NULL, NULL))
2528 : {
2529 40 : if (where)
2530 : {
2531 40 : if (formal->attr.artificial)
2532 1 : gfc_error_opt (0, "Interface mismatch in dummy procedure "
2533 : "at %L conflicts with %L: %s", &actual->where,
2534 : &formal->declared_at, err);
2535 : else
2536 39 : gfc_error_opt (0, "Interface mismatch in dummy procedure %qs at "
2537 : "%L: %s", formal->name, &actual->where, err);
2538 :
2539 : }
2540 40 : return false;
2541 : }
2542 :
2543 : /* The actual symbol may disagree with a global symbol. If so, issue an
2544 : error, but only if no previous error has been reported on the formal
2545 : argument. */
2546 1946 : actual_name = act_sym->name;
2547 1946 : if (!formal->error && actual_name)
2548 : {
2549 1946 : gfc_gsymbol *gsym;
2550 1946 : gsym = gfc_find_gsymbol (gfc_gsym_root, actual_name);
2551 1946 : if (gsym != NULL)
2552 : {
2553 180 : if (gsym->type == GSYM_SUBROUTINE && formal->attr.function)
2554 : {
2555 1 : gfc_error ("Passing global subroutine %qs declared at %L "
2556 : "as function at %L", actual_name, &gsym->where,
2557 : &actual->where);
2558 1 : return false;
2559 : }
2560 179 : if (gsym->type == GSYM_FUNCTION && formal->attr.subroutine)
2561 : {
2562 1 : gfc_error ("Passing global function %qs declared at %L "
2563 : "as subroutine at %L", actual_name, &gsym->where,
2564 : &actual->where);
2565 1 : return false;
2566 : }
2567 178 : if (gsym->type == GSYM_FUNCTION)
2568 : {
2569 99 : gfc_symbol *global_asym;
2570 99 : gfc_find_symbol (actual_name, gsym->ns, 0, &global_asym);
2571 99 : if (global_asym != NULL)
2572 : {
2573 99 : if (formal->attr.subroutine)
2574 : {
2575 0 : gfc_error ("Mismatch between subroutine and "
2576 : "function at %L", &actual->where);
2577 1 : return false;
2578 : }
2579 99 : else if (formal->attr.function)
2580 : {
2581 98 : gfc_typespec ts;
2582 :
2583 98 : if (global_asym->result)
2584 97 : ts = global_asym->result->ts;
2585 : else
2586 1 : ts = global_asym->ts;
2587 :
2588 98 : if (!gfc_compare_types (&ts,
2589 : &formal->ts))
2590 : {
2591 2 : gfc_error ("Type mismatch at %L passing global "
2592 : "function %qs declared at %L (%s/%s)",
2593 : &actual->where, actual_name,
2594 : &gsym->where,
2595 1 : gfc_typename (&global_asym->ts),
2596 : gfc_dummy_typename (&formal->ts));
2597 1 : return false;
2598 : }
2599 : }
2600 : else
2601 : {
2602 : /* The global symbol is a function. Set the formal
2603 : argument accordingly. */
2604 1 : formal->attr.function = 1;
2605 1 : formal->ts = global_asym->ts;
2606 : }
2607 : }
2608 : }
2609 : }
2610 : }
2611 :
2612 1943 : if (formal->attr.function && !act_sym->attr.function)
2613 : {
2614 5 : gfc_add_function (&act_sym->attr, act_sym->name,
2615 : &act_sym->declared_at);
2616 5 : if (act_sym->ts.type == BT_UNKNOWN
2617 5 : && !gfc_set_default_type (act_sym, 1, act_sym->ns))
2618 : return false;
2619 : }
2620 1938 : else if (formal->attr.subroutine && !act_sym->attr.subroutine)
2621 50 : gfc_add_subroutine (&act_sym->attr, act_sym->name,
2622 : &act_sym->declared_at);
2623 :
2624 1943 : return true;
2625 : }
2626 358631 : ppc = gfc_get_proc_ptr_comp (actual);
2627 358631 : if (ppc && ppc->ts.interface)
2628 : {
2629 496 : if (!gfc_compare_interfaces (formal, ppc->ts.interface, ppc->name, 0, 1,
2630 : err, sizeof(err), NULL, NULL))
2631 : {
2632 2 : if (where)
2633 2 : gfc_error_opt (0, "Interface mismatch in dummy procedure %qs at %L:"
2634 : " %s", formal->name, &actual->where, err);
2635 2 : return false;
2636 : }
2637 : }
2638 :
2639 : /* F2008, C1241. */
2640 5318 : if (formal->attr.pointer && formal->attr.contiguous
2641 358664 : && !gfc_is_simply_contiguous (actual, true, false))
2642 : {
2643 4 : if (where)
2644 4 : gfc_error ("Actual argument to contiguous pointer dummy %qs at %L "
2645 : "must be simply contiguous", formal->name, &actual->where);
2646 4 : return false;
2647 : }
2648 :
2649 358625 : symbol_attribute actual_attr = gfc_expr_attr (actual);
2650 358625 : if (actual->ts.type == BT_CLASS && !actual_attr.class_ok)
2651 : return true;
2652 :
2653 807 : if ((actual->expr_type != EXPR_NULL || actual->ts.type != BT_UNKNOWN)
2654 358310 : && actual->ts.type != BT_HOLLERITH
2655 358291 : && formal->ts.type != BT_ASSUMED
2656 354824 : && !(formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK))
2657 354824 : && !gfc_compare_types (&formal->ts, &actual->ts)
2658 464326 : && !(formal->ts.type == BT_DERIVED && actual->ts.type == BT_CLASS
2659 2 : && gfc_compare_derived_types (formal->ts.u.derived,
2660 2 : CLASS_DATA (actual)->ts.u.derived)))
2661 : {
2662 105756 : if (where)
2663 : {
2664 68 : if (formal->attr.artificial)
2665 : {
2666 19 : if (!flag_allow_argument_mismatch || !formal->error)
2667 14 : gfc_error_opt (0, "Type mismatch between actual argument at %L "
2668 : "and actual argument at %L (%s/%s).",
2669 : &actual->where,
2670 : &formal->declared_at,
2671 : gfc_typename (actual),
2672 : gfc_dummy_typename (&formal->ts));
2673 :
2674 19 : formal->error = 1;
2675 : }
2676 : else
2677 49 : gfc_error_opt (0, "Type mismatch in argument %qs at %L; passed %s "
2678 : "to %s", formal->name, where, gfc_typename (actual),
2679 : gfc_dummy_typename (&formal->ts));
2680 : }
2681 105756 : return false;
2682 : }
2683 :
2684 252812 : if (actual->ts.type == BT_ASSUMED && formal->ts.type != BT_ASSUMED)
2685 : {
2686 3 : if (where)
2687 1 : gfc_error ("Assumed-type actual argument at %L requires that dummy "
2688 : "argument %qs is of assumed type", &actual->where,
2689 : formal->name);
2690 3 : return false;
2691 : }
2692 :
2693 : /* TS29113 C407c; F2018 C711. */
2694 252809 : if (actual->ts.type == BT_ASSUMED
2695 326 : && gfc_symbol_rank (formal) == -1
2696 27 : && actual->rank != -1
2697 252816 : && !(actual->symtree->n.sym->as
2698 5 : && actual->symtree->n.sym->as->type == AS_ASSUMED_SHAPE))
2699 : {
2700 4 : if (where)
2701 4 : gfc_error ("Assumed-type actual argument at %L corresponding to "
2702 : "assumed-rank dummy argument %qs must be "
2703 : "assumed-shape or assumed-rank",
2704 : &actual->where, formal->name);
2705 4 : return false;
2706 : }
2707 :
2708 : /* F2008, 12.5.2.5; IR F08/0073. */
2709 252805 : if (formal->ts.type == BT_CLASS && formal->attr.class_ok
2710 14244 : && actual->expr_type != EXPR_NULL
2711 14244 : && ((CLASS_DATA (formal)->attr.class_pointer
2712 917 : && formal->attr.intent != INTENT_IN)
2713 13992 : || CLASS_DATA (formal)->attr.allocatable))
2714 : {
2715 1126 : if (actual->ts.type != BT_CLASS)
2716 : {
2717 2 : if (where)
2718 2 : gfc_error ("Actual argument to %qs at %L must be polymorphic",
2719 : formal->name, &actual->where);
2720 2 : return false;
2721 : }
2722 :
2723 1124 : if ((!UNLIMITED_POLY (formal) || !UNLIMITED_POLY(actual))
2724 781 : && !gfc_compare_derived_types (CLASS_DATA (actual)->ts.u.derived,
2725 781 : CLASS_DATA (formal)->ts.u.derived))
2726 : {
2727 1 : if (where)
2728 1 : gfc_error ("Actual argument to %qs at %L must have the same "
2729 : "declared type", formal->name, &actual->where);
2730 1 : return false;
2731 : }
2732 : }
2733 :
2734 : /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this
2735 : is necessary also for F03, so retain error for both.
2736 : NOTE: Other type/kind errors pre-empt this error. Since they are F03
2737 : compatible, no attempt has been made to channel to this one. */
2738 252802 : if (UNLIMITED_POLY (formal) && !UNLIMITED_POLY (actual)
2739 1622 : && (CLASS_DATA (formal)->attr.allocatable
2740 1622 : ||CLASS_DATA (formal)->attr.class_pointer))
2741 : {
2742 0 : if (where)
2743 0 : gfc_error ("Actual argument to %qs at %L must be unlimited "
2744 : "polymorphic since the formal argument is a "
2745 : "pointer or allocatable unlimited polymorphic "
2746 : "entity [F2008: 12.5.2.5]", formal->name,
2747 : &actual->where);
2748 0 : return false;
2749 : }
2750 :
2751 252802 : if (formal->ts.type == BT_CLASS && formal->attr.class_ok)
2752 14241 : codimension = CLASS_DATA (formal)->attr.codimension;
2753 : else
2754 238561 : codimension = formal->attr.codimension;
2755 :
2756 252802 : if (codimension && !gfc_is_coarray (actual))
2757 : {
2758 4 : if (where)
2759 4 : gfc_error ("Actual argument to %qs at %L must be a coarray",
2760 : formal->name, &actual->where);
2761 4 : return false;
2762 : }
2763 :
2764 238558 : formal_as = (formal->ts.type == BT_CLASS
2765 252798 : ? CLASS_DATA (formal)->as : formal->as);
2766 :
2767 252798 : if (codimension && formal->attr.allocatable)
2768 : {
2769 27 : gfc_ref *last = NULL;
2770 :
2771 54 : for (ref = actual->ref; ref; ref = ref->next)
2772 27 : if (ref->type == REF_COMPONENT)
2773 0 : last = ref;
2774 :
2775 : /* F2008, 12.5.2.6. */
2776 27 : if ((last && last->u.c.component->as->corank != formal->as->corank)
2777 : || (!last
2778 27 : && actual->symtree->n.sym->as->corank != formal->as->corank))
2779 : {
2780 1 : if (where)
2781 1 : gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)",
2782 1 : formal->name, &actual->where, formal->as->corank,
2783 0 : last ? last->u.c.component->as->corank
2784 1 : : actual->symtree->n.sym->as->corank);
2785 1 : return false;
2786 : }
2787 : }
2788 :
2789 417 : if (codimension)
2790 : {
2791 : /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */
2792 : /* F2018, 12.5.2.8. */
2793 417 : if (formal->attr.dimension
2794 162 : && (formal->attr.contiguous || formal->as->type != AS_ASSUMED_SHAPE)
2795 103 : && actual_attr.dimension
2796 519 : && !gfc_is_simply_contiguous (actual, true, true))
2797 : {
2798 2 : if (where)
2799 2 : gfc_error ("Actual argument to %qs at %L must be simply "
2800 : "contiguous or an element of such an array",
2801 : formal->name, &actual->where);
2802 2 : return false;
2803 : }
2804 :
2805 : /* F2008, C1303 and C1304. */
2806 415 : if (formal->attr.intent != INTENT_INOUT
2807 406 : && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS)
2808 203 : && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
2809 1 : && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE)
2810 405 : || formal->attr.lock_comp))
2811 :
2812 : {
2813 1 : if (where)
2814 1 : gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2815 : "which is LOCK_TYPE or has a LOCK_TYPE component",
2816 : formal->name, &actual->where);
2817 1 : return false;
2818 : }
2819 :
2820 : /* TS18508, C702/C703. */
2821 414 : if (formal->attr.intent != INTENT_INOUT
2822 405 : && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS)
2823 202 : && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
2824 0 : && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE)
2825 405 : || formal->attr.event_comp))
2826 :
2827 : {
2828 0 : if (where)
2829 0 : gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, "
2830 : "which is EVENT_TYPE or has a EVENT_TYPE component",
2831 : formal->name, &actual->where);
2832 0 : return false;
2833 : }
2834 : }
2835 :
2836 : /* F2008, C1239/C1240. */
2837 252794 : if (actual->expr_type == EXPR_VARIABLE
2838 104156 : && (actual->symtree->n.sym->attr.asynchronous
2839 104119 : || actual->symtree->n.sym->attr.volatile_)
2840 3284 : && (formal->attr.asynchronous || formal->attr.volatile_)
2841 75 : && actual->rank && formal->as
2842 70 : && !gfc_is_simply_contiguous (actual, true, false)
2843 252842 : && ((formal->as->type != AS_ASSUMED_SHAPE
2844 19 : && formal->as->type != AS_ASSUMED_RANK && !formal->attr.pointer)
2845 37 : || formal->attr.contiguous))
2846 : {
2847 22 : if (where)
2848 22 : gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or "
2849 : "assumed-rank array without CONTIGUOUS attribute - as actual"
2850 : " argument at %L is not simply contiguous and both are "
2851 : "ASYNCHRONOUS or VOLATILE", formal->name, &actual->where);
2852 22 : return false;
2853 : }
2854 :
2855 252772 : if (formal->attr.allocatable && !codimension
2856 3188 : && actual_attr.codimension)
2857 : {
2858 5 : if (formal->attr.intent == INTENT_OUT)
2859 : {
2860 1 : if (where)
2861 1 : gfc_error ("Passing coarray at %L to allocatable, noncoarray, "
2862 : "INTENT(OUT) dummy argument %qs", &actual->where,
2863 : formal->name);
2864 1 : return false;
2865 : }
2866 4 : else if (warn_surprising && where && formal->attr.intent != INTENT_IN)
2867 1 : gfc_warning (OPT_Wsurprising,
2868 : "Passing coarray at %L to allocatable, noncoarray dummy "
2869 : "argument %qs, which is invalid if the allocation status"
2870 : " is modified", &actual->where, formal->name);
2871 : }
2872 :
2873 : /* If the rank is the same or the formal argument has assumed-rank. */
2874 252771 : if (gfc_symbol_rank (formal) == actual->rank || gfc_symbol_rank (formal) == -1)
2875 244664 : return true;
2876 :
2877 1818 : rank_check = where != NULL && !is_elemental && formal_as
2878 1785 : && (formal_as->type == AS_ASSUMED_SHAPE
2879 1785 : || formal_as->type == AS_DEFERRED)
2880 8258 : && !(actual->expr_type == EXPR_NULL
2881 86 : && actual->ts.type == BT_UNKNOWN);
2882 :
2883 : /* Skip rank checks for NO_ARG_CHECK. */
2884 8107 : if (formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK))
2885 : return true;
2886 :
2887 : /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */
2888 7769 : if (rank_check || ranks_must_agree
2889 7611 : || (formal->attr.pointer && actual->expr_type != EXPR_NULL)
2890 7611 : || (actual->rank != 0
2891 6820 : && !(is_elemental || formal->attr.dimension
2892 118 : || (formal->ts.type == BT_CLASS
2893 85 : && CLASS_DATA (formal)->attr.dimension)))
2894 7578 : || (actual->rank == 0
2895 791 : && ((formal->ts.type == BT_CLASS
2896 1 : && CLASS_DATA (formal)->as->type == AS_ASSUMED_SHAPE)
2897 791 : || (formal->ts.type != BT_CLASS
2898 790 : && formal->as->type == AS_ASSUMED_SHAPE))
2899 13 : && actual->expr_type != EXPR_NULL)
2900 7578 : || (actual->rank == 0
2901 791 : && (formal->attr.dimension
2902 1 : || (formal->ts.type == BT_CLASS
2903 1 : && CLASS_DATA (formal)->attr.dimension))
2904 791 : && gfc_is_coindexed (actual))
2905 : /* Assumed-rank actual argument; F2018 C838. */
2906 15344 : || actual->rank == -1)
2907 : {
2908 199 : if (where
2909 199 : && (!formal->attr.artificial || (!formal->maybe_array
2910 8 : && !maybe_dummy_array_arg (actual))))
2911 : {
2912 104 : locus *where_formal;
2913 104 : if (formal->attr.artificial)
2914 8 : where_formal = &formal->declared_at;
2915 : else
2916 : where_formal = NULL;
2917 :
2918 104 : argument_rank_mismatch (formal->name, &actual->where,
2919 : gfc_symbol_rank (formal), actual->rank,
2920 : where_formal);
2921 : }
2922 199 : return false;
2923 : }
2924 7570 : else if (actual->rank != 0
2925 6782 : && (is_elemental || formal->attr.dimension
2926 85 : || (formal->ts.type == BT_CLASS
2927 85 : && CLASS_DATA (formal)->attr.dimension)))
2928 : return true;
2929 :
2930 : /* At this point, we are considering a scalar passed to an array. This
2931 : is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4),
2932 : - if the actual argument is (a substring of) an element of a
2933 : non-assumed-shape/non-pointer/non-polymorphic array; or
2934 : - (F2003) if the actual argument is of type character of default/c_char
2935 : kind.
2936 : - (F2018) if the dummy argument is type(*). */
2937 :
2938 1576 : is_pointer = actual->expr_type == EXPR_VARIABLE
2939 788 : ? actual->symtree->n.sym->attr.pointer : false;
2940 :
2941 811 : for (ref = actual->ref; ref; ref = ref->next)
2942 : {
2943 439 : if (ref->type == REF_COMPONENT)
2944 12 : is_pointer = ref->u.c.component->attr.pointer;
2945 427 : else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT
2946 420 : && ref->u.ar.dimen > 0
2947 417 : && (!ref->next
2948 9 : || (ref->next->type == REF_SUBSTRING && !ref->next->next)))
2949 : break;
2950 : }
2951 :
2952 788 : if (actual->ts.type == BT_CLASS && actual->expr_type != EXPR_NULL)
2953 : {
2954 0 : if (where)
2955 0 : gfc_error ("Polymorphic scalar passed to array dummy argument %qs "
2956 : "at %L", formal->name, &actual->where);
2957 0 : return false;
2958 : }
2959 :
2960 788 : if (actual->expr_type != EXPR_NULL && ref && actual->ts.type != BT_CHARACTER
2961 367 : && (is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE))
2962 : {
2963 10 : if (where)
2964 : {
2965 10 : if (formal->attr.artificial)
2966 3 : gfc_error ("Element of assumed-shape or pointer array "
2967 : "as actual argument at %L cannot correspond to "
2968 : "actual argument at %L",
2969 : &actual->where, &formal->declared_at);
2970 : else
2971 7 : gfc_error ("Element of assumed-shape or pointer "
2972 : "array passed to array dummy argument %qs at %L",
2973 : formal->name, &actual->where);
2974 : }
2975 10 : return false;
2976 : }
2977 :
2978 778 : if (actual->ts.type == BT_CHARACTER && actual->expr_type != EXPR_NULL
2979 280 : && (!ref || is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE))
2980 : {
2981 263 : if (formal->ts.kind != 1 && (gfc_option.allow_std & GFC_STD_GNU) == 0)
2982 : {
2983 0 : if (where)
2984 0 : gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind "
2985 : "CHARACTER actual argument with array dummy argument "
2986 : "%qs at %L", formal->name, &actual->where);
2987 0 : return false;
2988 : }
2989 :
2990 263 : if (where && (gfc_option.allow_std & GFC_STD_F2003) == 0)
2991 : {
2992 50 : gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with "
2993 : "array dummy argument %qs at %L",
2994 : formal->name, &actual->where);
2995 50 : return false;
2996 : }
2997 : else
2998 213 : return ((gfc_option.allow_std & GFC_STD_F2003) != 0);
2999 : }
3000 :
3001 498 : if (ref == NULL && actual->expr_type != EXPR_NULL)
3002 : {
3003 53 : if (actual->rank == 0
3004 53 : && formal->ts.type == BT_ASSUMED
3005 3 : && formal->as
3006 3 : && formal->as->type == AS_ASSUMED_SIZE)
3007 : /* This is new in F2018, type(*) is new in TS29113, but gfortran does
3008 : not differentiate. Thus, if type(*) exists, it is valid;
3009 : otherwise, type(*) is already rejected. */
3010 : return true;
3011 50 : if (where
3012 50 : && (!formal->attr.artificial || (!formal->maybe_array
3013 3 : && !maybe_dummy_array_arg (actual))))
3014 : {
3015 49 : locus *where_formal;
3016 49 : if (formal->attr.artificial)
3017 2 : where_formal = &formal->declared_at;
3018 : else
3019 : where_formal = NULL;
3020 :
3021 49 : argument_rank_mismatch (formal->name, &actual->where,
3022 : gfc_symbol_rank (formal), actual->rank,
3023 : where_formal);
3024 : }
3025 50 : return false;
3026 : }
3027 :
3028 : return true;
3029 : }
3030 :
3031 :
3032 : /* Returns the storage size of a symbol (formal argument) or sets argument
3033 : size_known to false if it cannot be determined. */
3034 :
3035 : static unsigned long
3036 244182 : get_sym_storage_size (gfc_symbol *sym, bool *size_known)
3037 : {
3038 244182 : int i;
3039 244182 : unsigned long strlen, elements;
3040 :
3041 244182 : *size_known = false;
3042 :
3043 244182 : if (sym->ts.type == BT_CHARACTER)
3044 : {
3045 33735 : if (sym->ts.u.cl && sym->ts.u.cl->length
3046 7170 : && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT
3047 6183 : && sym->ts.u.cl->length->ts.type == BT_INTEGER)
3048 6181 : strlen = mpz_get_ui (sym->ts.u.cl->length->value.integer);
3049 : else
3050 : return 0;
3051 : }
3052 : else
3053 : strlen = 1;
3054 :
3055 216628 : if (gfc_symbol_rank (sym) == 0)
3056 : {
3057 183206 : *size_known = true;
3058 183206 : return strlen;
3059 : }
3060 :
3061 33422 : elements = 1;
3062 33422 : if (sym->as->type != AS_EXPLICIT)
3063 : return 0;
3064 14736 : for (i = 0; i < sym->as->rank; i++)
3065 : {
3066 9708 : if (sym->as->upper[i]->expr_type != EXPR_CONSTANT
3067 6530 : || sym->as->lower[i]->expr_type != EXPR_CONSTANT
3068 6530 : || sym->as->upper[i]->ts.type != BT_INTEGER
3069 6529 : || sym->as->lower[i]->ts.type != BT_INTEGER)
3070 : return 0;
3071 :
3072 6527 : elements *= mpz_get_si (sym->as->upper[i]->value.integer)
3073 6527 : - mpz_get_si (sym->as->lower[i]->value.integer) + 1L;
3074 : }
3075 :
3076 5028 : *size_known = true;
3077 :
3078 5028 : return strlen*elements;
3079 : }
3080 :
3081 :
3082 : /* Returns the storage size of an expression (actual argument) or sets argument
3083 : size_known to false if it cannot be determined. For an array element, it
3084 : returns the remaining size as the element sequence consists of all storage
3085 : units of the actual argument up to the end of the array. */
3086 :
3087 : static unsigned long
3088 244182 : get_expr_storage_size (gfc_expr *e, bool *size_known, long int *charlen)
3089 : {
3090 244182 : int i;
3091 244182 : long int strlen, elements;
3092 244182 : long int substrlen = 0;
3093 244182 : bool is_str_storage = false;
3094 244182 : gfc_ref *ref;
3095 :
3096 244182 : *size_known = false;
3097 244182 : *charlen = -1;
3098 :
3099 244182 : if (e == NULL)
3100 : return 0;
3101 :
3102 244182 : if (e->ts.type == BT_CHARACTER)
3103 : {
3104 34128 : if (e->ts.u.cl && e->ts.u.cl->length
3105 11592 : && e->ts.u.cl->length->expr_type == EXPR_CONSTANT
3106 10783 : && e->ts.u.cl->length->ts.type == BT_INTEGER)
3107 10782 : strlen = mpz_get_si (e->ts.u.cl->length->value.integer);
3108 23346 : else if (e->expr_type == EXPR_CONSTANT
3109 19647 : && (e->ts.u.cl == NULL || e->ts.u.cl->length == NULL))
3110 19647 : strlen = e->value.character.length;
3111 : else
3112 : return 0;
3113 30429 : *charlen = strlen;
3114 : }
3115 : else
3116 : strlen = 1; /* Length per element. */
3117 :
3118 240483 : if (e->rank == 0 && !e->ref)
3119 : {
3120 195344 : *size_known = true;
3121 195344 : return strlen;
3122 : }
3123 :
3124 45139 : elements = 1;
3125 45139 : if (!e->ref)
3126 : {
3127 6704 : if (!e->shape)
3128 : return 0;
3129 12279 : for (i = 0; i < e->rank; i++)
3130 6687 : elements *= mpz_get_si (e->shape[i]);
3131 5592 : {
3132 5592 : *size_known = true;
3133 5592 : return elements*strlen;
3134 : }
3135 : }
3136 :
3137 63092 : for (ref = e->ref; ref; ref = ref->next)
3138 : {
3139 39929 : if (ref->type == REF_SUBSTRING && ref->u.ss.start
3140 64 : && ref->u.ss.start->expr_type == EXPR_CONSTANT)
3141 : {
3142 58 : if (is_str_storage)
3143 : {
3144 : /* The string length is the substring length.
3145 : Set now to full string length. */
3146 5 : if (!ref->u.ss.length || !ref->u.ss.length->length
3147 4 : || ref->u.ss.length->length->expr_type != EXPR_CONSTANT)
3148 : return 0;
3149 :
3150 4 : strlen = mpz_get_ui (ref->u.ss.length->length->value.integer);
3151 : }
3152 57 : substrlen = strlen - mpz_get_ui (ref->u.ss.start->value.integer) + 1;
3153 57 : continue;
3154 : }
3155 :
3156 39871 : if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION)
3157 11542 : for (i = 0; i < ref->u.ar.dimen; i++)
3158 : {
3159 7104 : long int start, end, stride;
3160 7104 : stride = 1;
3161 :
3162 7104 : if (ref->u.ar.stride[i])
3163 : {
3164 2784 : if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT
3165 2621 : && ref->u.ar.stride[i]->ts.type == BT_INTEGER)
3166 2621 : stride = mpz_get_si (ref->u.ar.stride[i]->value.integer);
3167 : else
3168 : return 0;
3169 : }
3170 :
3171 6941 : if (ref->u.ar.start[i])
3172 : {
3173 3995 : if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT
3174 3600 : && ref->u.ar.start[i]->ts.type == BT_INTEGER)
3175 3600 : start = mpz_get_si (ref->u.ar.start[i]->value.integer);
3176 : else
3177 : return 0;
3178 : }
3179 2946 : else if (ref->u.ar.as->lower[i]
3180 2650 : && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT
3181 2650 : && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER)
3182 2650 : start = mpz_get_si (ref->u.ar.as->lower[i]->value.integer);
3183 : else
3184 : return 0;
3185 :
3186 6250 : if (ref->u.ar.end[i])
3187 : {
3188 4879 : if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT
3189 4760 : && ref->u.ar.end[i]->ts.type == BT_INTEGER)
3190 4760 : end = mpz_get_si (ref->u.ar.end[i]->value.integer);
3191 : else
3192 : return 0;
3193 : }
3194 1371 : else if (ref->u.ar.as->upper[i]
3195 1117 : && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT
3196 1083 : && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER)
3197 1082 : end = mpz_get_si (ref->u.ar.as->upper[i]->value.integer);
3198 : else
3199 : return 0;
3200 :
3201 5842 : elements *= (end - start)/stride + 1L;
3202 : }
3203 34171 : else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_FULL)
3204 49398 : for (i = 0; i < ref->u.ar.as->rank; i++)
3205 : {
3206 33278 : if (ref->u.ar.as->lower[i] && ref->u.ar.as->upper[i]
3207 23351 : && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT
3208 23302 : && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER
3209 23302 : && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT
3210 21672 : && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER)
3211 21672 : elements *= mpz_get_si (ref->u.ar.as->upper[i]->value.integer)
3212 21672 : - mpz_get_si (ref->u.ar.as->lower[i]->value.integer)
3213 21672 : + 1L;
3214 : else
3215 : return 0;
3216 : }
3217 6445 : else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT
3218 4059 : && e->expr_type == EXPR_VARIABLE)
3219 : {
3220 4059 : if (ref->u.ar.as->type == AS_ASSUMED_SHAPE
3221 3860 : || e->symtree->n.sym->attr.pointer)
3222 : {
3223 240 : elements = 1;
3224 240 : continue;
3225 : }
3226 :
3227 : /* Determine the number of remaining elements in the element
3228 : sequence for array element designators. */
3229 3819 : is_str_storage = true;
3230 5334 : for (i = ref->u.ar.dimen - 1; i >= 0; i--)
3231 : {
3232 3917 : if (ref->u.ar.start[i] == NULL
3233 3917 : || ref->u.ar.start[i]->expr_type != EXPR_CONSTANT
3234 2113 : || ref->u.ar.as->upper[i] == NULL
3235 1542 : || ref->u.ar.as->lower[i] == NULL
3236 1542 : || ref->u.ar.as->upper[i]->expr_type != EXPR_CONSTANT
3237 1515 : || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT
3238 1515 : || ref->u.ar.as->upper[i]->ts.type != BT_INTEGER
3239 1515 : || ref->u.ar.as->lower[i]->ts.type != BT_INTEGER)
3240 : return 0;
3241 :
3242 1515 : elements
3243 1515 : = elements
3244 1515 : * (mpz_get_si (ref->u.ar.as->upper[i]->value.integer)
3245 1515 : - mpz_get_si (ref->u.ar.as->lower[i]->value.integer)
3246 1515 : + 1L)
3247 1515 : - (mpz_get_si (ref->u.ar.start[i]->value.integer)
3248 1515 : - mpz_get_si (ref->u.ar.as->lower[i]->value.integer));
3249 : }
3250 : }
3251 2386 : else if (ref->type == REF_COMPONENT && ref->u.c.component->attr.function
3252 91 : && ref->u.c.component->attr.proc_pointer
3253 91 : && ref->u.c.component->attr.dimension)
3254 : {
3255 : /* Array-valued procedure-pointer components. */
3256 8 : gfc_array_spec *as = ref->u.c.component->as;
3257 15 : for (i = 0; i < as->rank; i++)
3258 : {
3259 8 : if (!as->upper[i] || !as->lower[i]
3260 8 : || as->upper[i]->expr_type != EXPR_CONSTANT
3261 7 : || as->lower[i]->expr_type != EXPR_CONSTANT
3262 7 : || as->upper[i]->ts.type != BT_INTEGER
3263 7 : || as->lower[i]->ts.type != BT_INTEGER)
3264 : return 0;
3265 :
3266 7 : elements = elements
3267 7 : * (mpz_get_si (as->upper[i]->value.integer)
3268 7 : - mpz_get_si (as->lower[i]->value.integer) + 1L);
3269 : }
3270 : }
3271 : }
3272 :
3273 23163 : *size_known = true;
3274 :
3275 23163 : if (substrlen)
3276 51 : return (is_str_storage) ? substrlen + (elements-1)*strlen
3277 51 : : elements*strlen;
3278 : else
3279 23112 : return elements*strlen;
3280 : }
3281 :
3282 :
3283 : /* Given an expression, check whether it is an array section
3284 : which has a vector subscript. */
3285 :
3286 : bool
3287 14159 : gfc_has_vector_subscript (gfc_expr *e)
3288 : {
3289 14159 : int i;
3290 14159 : gfc_ref *ref;
3291 :
3292 14159 : if (e == NULL || e->rank == 0 || e->expr_type != EXPR_VARIABLE)
3293 : return false;
3294 :
3295 13503 : for (ref = e->ref; ref; ref = ref->next)
3296 7808 : if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION)
3297 1067 : for (i = 0; i < ref->u.ar.dimen; i++)
3298 635 : if (ref->u.ar.dimen_type[i] == DIMEN_VECTOR)
3299 : return true;
3300 :
3301 : return false;
3302 : }
3303 :
3304 :
3305 : static bool
3306 27 : is_procptr_result (gfc_expr *expr)
3307 : {
3308 27 : gfc_component *c = gfc_get_proc_ptr_comp (expr);
3309 27 : if (c)
3310 2 : return (c->ts.interface && (c->ts.interface->attr.proc_pointer == 1));
3311 : else
3312 26 : return ((expr->symtree->n.sym->result != expr->symtree->n.sym)
3313 28 : && (expr->symtree->n.sym->result->attr.proc_pointer == 1));
3314 : }
3315 :
3316 :
3317 : /* Recursively append candidate argument ARG to CANDIDATES. Store the
3318 : number of total candidates in CANDIDATES_LEN. */
3319 :
3320 : static void
3321 1 : lookup_arg_fuzzy_find_candidates (gfc_formal_arglist *arg,
3322 : char **&candidates,
3323 : size_t &candidates_len)
3324 : {
3325 2 : for (gfc_formal_arglist *p = arg; p && p->sym; p = p->next)
3326 1 : vec_push (candidates, candidates_len, p->sym->name);
3327 1 : }
3328 :
3329 :
3330 : /* Lookup argument ARG fuzzily, taking names in ARGUMENTS into account. */
3331 :
3332 : static const char*
3333 1 : lookup_arg_fuzzy (const char *arg, gfc_formal_arglist *arguments)
3334 : {
3335 1 : char **candidates = NULL;
3336 1 : size_t candidates_len = 0;
3337 1 : lookup_arg_fuzzy_find_candidates (arguments, candidates, candidates_len);
3338 1 : return gfc_closest_fuzzy_match (arg, candidates);
3339 : }
3340 :
3341 :
3342 : static gfc_dummy_arg *
3343 370621 : get_nonintrinsic_dummy_arg (gfc_formal_arglist *formal)
3344 : {
3345 0 : gfc_dummy_arg * const dummy_arg = gfc_get_dummy_arg ();
3346 :
3347 370621 : dummy_arg->intrinsicness = GFC_NON_INTRINSIC_DUMMY_ARG;
3348 370621 : dummy_arg->u.non_intrinsic = formal;
3349 :
3350 370621 : return dummy_arg;
3351 : }
3352 :
3353 :
3354 : /* Given formal and actual argument lists, see if they are compatible.
3355 : If they are compatible, the actual argument list is sorted to
3356 : correspond with the formal list, and elements for missing optional
3357 : arguments are inserted. If WHERE pointer is nonnull, then we issue
3358 : errors when things don't match instead of just returning the status
3359 : code. */
3360 :
3361 : bool
3362 196664 : gfc_compare_actual_formal (gfc_actual_arglist **ap, gfc_formal_arglist *formal,
3363 : int ranks_must_agree, int is_elemental,
3364 : bool in_statement_function, locus *where)
3365 : {
3366 196664 : gfc_actual_arglist **new_arg, *a, *actual;
3367 196664 : gfc_formal_arglist *f;
3368 196664 : int i, n, na;
3369 196664 : unsigned long actual_size, formal_size;
3370 196664 : long int charlen;
3371 196664 : bool full_array = false;
3372 196664 : gfc_array_ref *actual_arr_ref;
3373 196664 : gfc_array_spec *fas, *aas;
3374 196664 : bool pointer_dummy, pointer_arg, allocatable_arg;
3375 196664 : bool procptr_dummy, optional_dummy, allocatable_dummy;
3376 196664 : bool actual_size_known = false;
3377 196664 : bool formal_size_known = false;
3378 196664 : bool ok = true;
3379 :
3380 196664 : actual = *ap;
3381 :
3382 196664 : if (actual == NULL && formal == NULL)
3383 : return true;
3384 :
3385 : n = 0;
3386 549734 : for (f = formal; f; f = f->next)
3387 371038 : n++;
3388 :
3389 178696 : new_arg = XALLOCAVEC (gfc_actual_arglist *, n);
3390 :
3391 549734 : for (i = 0; i < n; i++)
3392 371038 : new_arg[i] = NULL;
3393 :
3394 : na = 0;
3395 : f = formal;
3396 : i = 0;
3397 :
3398 543945 : for (a = actual; a; a = a->next, f = f->next)
3399 : {
3400 366450 : if (a->name != NULL && in_statement_function)
3401 : {
3402 1 : gfc_error ("Keyword argument %qs at %L is invalid in "
3403 1 : "a statement function", a->name, &a->expr->where);
3404 1 : return false;
3405 : }
3406 :
3407 : /* Look for keywords but ignore g77 extensions like %VAL. */
3408 366449 : if (a->name != NULL && a->name[0] != '%')
3409 : {
3410 : i = 0;
3411 12205 : for (f = formal; f; f = f->next, i++)
3412 : {
3413 12171 : if (f->sym == NULL)
3414 0 : continue;
3415 12171 : if (strcmp (f->sym->name, a->name) == 0)
3416 : break;
3417 : }
3418 :
3419 3518 : if (f == NULL)
3420 : {
3421 34 : if (where)
3422 : {
3423 1 : const char *guessed = lookup_arg_fuzzy (a->name, formal);
3424 1 : if (guessed)
3425 1 : gfc_error ("Keyword argument %qs at %L is not in "
3426 : "the procedure; did you mean %qs?",
3427 1 : a->name, &a->expr->where, guessed);
3428 : else
3429 0 : gfc_error ("Keyword argument %qs at %L is not in "
3430 0 : "the procedure", a->name, &a->expr->where);
3431 : }
3432 34 : return false;
3433 : }
3434 :
3435 3518 : if (new_arg[i] != NULL)
3436 : {
3437 0 : if (where)
3438 0 : gfc_error ("Keyword argument %qs at %L is already associated "
3439 : "with another actual argument", a->name,
3440 0 : &a->expr->where);
3441 0 : return false;
3442 : }
3443 : }
3444 :
3445 366415 : if (f == NULL)
3446 : {
3447 1158 : if (where)
3448 8 : gfc_error ("More actual than formal arguments in procedure "
3449 : "call at %L", where);
3450 1158 : return false;
3451 : }
3452 :
3453 365257 : if (f->sym == NULL && a->expr == NULL)
3454 210 : goto match;
3455 :
3456 365047 : if (f->sym == NULL)
3457 : {
3458 : /* These errors have to be issued, otherwise an ICE can occur.
3459 : See PR 78865. */
3460 6 : if (where)
3461 6 : gfc_error_now ("Missing alternate return specifier in subroutine "
3462 : "call at %L", where);
3463 6 : return false;
3464 : }
3465 : else
3466 : {
3467 365041 : if (a->associated_dummy)
3468 124375 : free (a->associated_dummy);
3469 365041 : a->associated_dummy = get_nonintrinsic_dummy_arg (f);
3470 : }
3471 :
3472 365041 : if (a->expr == NULL)
3473 : {
3474 8 : if (f->sym->attr.optional)
3475 6 : continue;
3476 : else
3477 : {
3478 2 : if (where)
3479 1 : gfc_error_now ("Unexpected alternate return specifier in "
3480 : "subroutine call at %L", where);
3481 2 : return false;
3482 : }
3483 : }
3484 :
3485 : /* Make sure that intrinsic vtables exist for calls to unlimited
3486 : polymorphic formal arguments. */
3487 365033 : if (UNLIMITED_POLY (f->sym)
3488 2879 : && a->expr->ts.type != BT_DERIVED
3489 : && a->expr->ts.type != BT_CLASS
3490 : && a->expr->ts.type != BT_ASSUMED)
3491 929 : gfc_find_vtab (&a->expr->ts);
3492 :
3493 : /* Interp J3/22-146:
3494 : "If the context of the reference to NULL is an <actual argument>
3495 : corresponding to an <assumed-rank> dummy argument, MOLD shall be
3496 : present." */
3497 365033 : if (a->expr->expr_type == EXPR_NULL
3498 826 : && a->expr->ts.type == BT_UNKNOWN
3499 264 : && f->sym->as
3500 97 : && f->sym->as->type == AS_ASSUMED_RANK)
3501 : {
3502 1 : gfc_error ("Intrinsic %<NULL()%> without %<MOLD%> argument at %L "
3503 : "passed to assumed-rank dummy %qs",
3504 : &a->expr->where, f->sym->name);
3505 1 : ok = false;
3506 1 : goto match;
3507 : }
3508 :
3509 365032 : if (warn_surprising
3510 1281 : && a->expr->expr_type == EXPR_VARIABLE
3511 620 : && a->expr->symtree->n.sym->as
3512 265 : && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SIZE
3513 153 : && f->sym->as
3514 153 : && f->sym->as->type == AS_ASSUMED_RANK)
3515 1 : gfc_warning (0, "The assumed-size dummy %qs is being passed at %L to "
3516 : "an assumed-rank dummy %qs", a->expr->symtree->name,
3517 : &a->expr->where, f->sym->name);
3518 :
3519 365032 : if (a->expr->expr_type == EXPR_NULL
3520 825 : && a->expr->ts.type == BT_UNKNOWN
3521 263 : && f->sym->ts.type == BT_CHARACTER
3522 83 : && !f->sym->ts.deferred
3523 46 : && f->sym->ts.u.cl
3524 46 : && f->sym->ts.u.cl->length == NULL)
3525 : {
3526 1 : gfc_error ("Intrinsic %<NULL()%> without %<MOLD%> argument at %L "
3527 : "passed to assumed-length dummy %qs",
3528 : &a->expr->where, f->sym->name);
3529 1 : ok = false;
3530 1 : goto match;
3531 : }
3532 :
3533 : /* Allow passing of NULL() as disassociated pointer, procedure
3534 : pointer, or unallocated allocatable (F2008+) to a respective dummy
3535 : argument. */
3536 730062 : pointer_dummy = ((f->sym->ts.type != BT_CLASS
3537 349984 : && f->sym->attr.pointer)
3538 709653 : || (f->sym->ts.type == BT_CLASS
3539 15047 : && CLASS_DATA (f->sym)->attr.class_pointer));
3540 :
3541 730062 : procptr_dummy = ((f->sym->ts.type != BT_CLASS
3542 349984 : && f->sym->attr.proc_pointer)
3543 714803 : || (f->sym->ts.type == BT_CLASS
3544 15047 : && CLASS_DATA (f->sym)->attr.proc_pointer));
3545 :
3546 365031 : optional_dummy = f->sym->attr.optional;
3547 :
3548 730062 : allocatable_dummy = ((f->sym->ts.type != BT_CLASS
3549 349984 : && f->sym->attr.allocatable)
3550 711766 : || (f->sym->ts.type == BT_CLASS
3551 15047 : && CLASS_DATA (f->sym)->attr.allocatable));
3552 :
3553 365031 : if (a->expr->expr_type == EXPR_NULL
3554 : && !pointer_dummy
3555 824 : && !procptr_dummy
3556 338 : && !(optional_dummy
3557 287 : && (gfc_option.allow_std & GFC_STD_F2008) != 0)
3558 54 : && !(allocatable_dummy
3559 50 : && (gfc_option.allow_std & GFC_STD_F2008) != 0))
3560 : {
3561 5 : if (where
3562 4 : && (!f->sym->attr.optional
3563 2 : || (f->sym->ts.type != BT_CLASS && f->sym->attr.allocatable)
3564 1 : || (f->sym->ts.type == BT_CLASS
3565 0 : && CLASS_DATA (f->sym)->attr.allocatable)))
3566 3 : gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs",
3567 : where, f->sym->name);
3568 1 : else if (where)
3569 1 : gfc_error ("Fortran 2008: Null pointer at %L to non-pointer "
3570 : "dummy %qs", where, f->sym->name);
3571 5 : ok = false;
3572 5 : goto match;
3573 : }
3574 :
3575 365026 : if (!compare_parameter (f->sym, a->expr, ranks_must_agree,
3576 : is_elemental, where))
3577 : {
3578 106303 : ok = false;
3579 106303 : goto match;
3580 : }
3581 :
3582 : /* TS 29113, 6.3p2; F2018 15.5.2.4. */
3583 258723 : if (f->sym->ts.type == BT_ASSUMED
3584 3473 : && (a->expr->ts.type == BT_DERIVED
3585 3029 : || (a->expr->ts.type == BT_CLASS && CLASS_DATA (a->expr))))
3586 : {
3587 651 : gfc_symbol *derived = (a->expr->ts.type == BT_DERIVED
3588 : ? a->expr->ts.u.derived
3589 207 : : CLASS_DATA (a->expr)->ts.u.derived);
3590 651 : gfc_namespace *f2k_derived = derived->f2k_derived;
3591 651 : if (derived->attr.pdt_type
3592 650 : || (f2k_derived
3593 585 : && (f2k_derived->finalizers || f2k_derived->tb_sym_root)))
3594 : {
3595 5 : gfc_error ("Actual argument at %L to assumed-type dummy "
3596 : "has type parameters or is of "
3597 : "derived type with type-bound or FINAL procedures",
3598 : &a->expr->where);
3599 5 : ok = false;
3600 5 : goto match;
3601 : }
3602 : }
3603 :
3604 258718 : if (UNLIMITED_POLY (a->expr)
3605 1231 : && !(f->sym->ts.type == BT_ASSUMED || UNLIMITED_POLY (f->sym)))
3606 : {
3607 1 : gfc_error ("Unlimited polymorphic actual argument at %L is not "
3608 : "matched with either an unlimited polymorphic or "
3609 : "assumed type dummy argument", &a->expr->where);
3610 1 : ok = false;
3611 1 : goto match;
3612 : }
3613 :
3614 : /* Special case for character arguments. For allocatable, pointer
3615 : and assumed-shape dummies, the string length needs to match
3616 : exactly. */
3617 258717 : if (a->expr->ts.type == BT_CHARACTER
3618 34321 : && a->expr->ts.u.cl && a->expr->ts.u.cl->length
3619 11732 : && a->expr->ts.u.cl->length->expr_type == EXPR_CONSTANT
3620 10923 : && a->expr->ts.u.cl->length->ts.type == BT_INTEGER
3621 10922 : && f->sym->ts.type == BT_CHARACTER && f->sym->ts.u.cl
3622 10591 : && f->sym->ts.u.cl->length
3623 5572 : && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT
3624 4719 : && f->sym->ts.u.cl->length->ts.type == BT_INTEGER
3625 4717 : && (f->sym->attr.pointer || f->sym->attr.allocatable
3626 4307 : || (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE))
3627 1020 : && (mpz_cmp (a->expr->ts.u.cl->length->value.integer,
3628 1020 : f->sym->ts.u.cl->length->value.integer) != 0))
3629 : {
3630 14 : long actual_len, formal_len;
3631 14 : actual_len = mpz_get_si (a->expr->ts.u.cl->length->value.integer);
3632 14 : formal_len = mpz_get_si (f->sym->ts.u.cl->length->value.integer);
3633 :
3634 14 : if (where && (f->sym->attr.pointer || f->sym->attr.allocatable))
3635 : {
3636 : /* Emit a warning for -std=legacy and an error otherwise. */
3637 5 : if (gfc_option.warn_std == 0)
3638 4 : gfc_warning (0, "Character length mismatch (%ld/%ld) between "
3639 : "actual argument and pointer or allocatable "
3640 : "dummy argument %qs at %L", actual_len, formal_len,
3641 : f->sym->name, &a->expr->where);
3642 : else
3643 1 : gfc_error ("Character length mismatch (%ld/%ld) between "
3644 : "actual argument and pointer or allocatable "
3645 : "dummy argument %qs at %L", actual_len, formal_len,
3646 : f->sym->name, &a->expr->where);
3647 : }
3648 9 : else if (where)
3649 : {
3650 : /* Emit a warning for -std=legacy and an error otherwise. */
3651 9 : if (gfc_option.warn_std == 0)
3652 0 : gfc_warning (0, "Character length mismatch (%ld/%ld) between "
3653 : "actual argument and assumed-shape dummy argument "
3654 : "%qs at %L", actual_len, formal_len,
3655 : f->sym->name, &a->expr->where);
3656 : else
3657 9 : gfc_error ("Character length mismatch (%ld/%ld) between "
3658 : "actual argument and assumed-shape dummy argument "
3659 : "%qs at %L", actual_len, formal_len,
3660 : f->sym->name, &a->expr->where);
3661 :
3662 : }
3663 14 : ok = false;
3664 14 : goto match;
3665 : }
3666 :
3667 258703 : if ((f->sym->attr.pointer || f->sym->attr.allocatable)
3668 8441 : && f->sym->ts.deferred != a->expr->ts.deferred
3669 38 : && a->expr->ts.type == BT_CHARACTER)
3670 : {
3671 1 : if (where)
3672 1 : gfc_error ("Actual argument at %L to allocatable or "
3673 : "pointer dummy argument %qs must have a deferred "
3674 : "length type parameter if and only if the dummy has one",
3675 : &a->expr->where, f->sym->name);
3676 1 : ok = false;
3677 1 : goto match;
3678 : }
3679 :
3680 258702 : if (f->sym->ts.type == BT_CLASS)
3681 14263 : goto skip_size_check;
3682 :
3683 : /* Skip size check for NULL() actual without MOLD argument. */
3684 244439 : if (a->expr->expr_type == EXPR_NULL && a->expr->ts.type == BT_UNKNOWN)
3685 257 : goto skip_size_check;
3686 :
3687 244182 : actual_size = get_expr_storage_size (a->expr, &actual_size_known, &charlen);
3688 244182 : formal_size = get_sym_storage_size (f->sym, &formal_size_known);
3689 :
3690 : /* If the formal is a scalar character variable, use the charlen of the
3691 : actual. */
3692 244182 : if (actual_size_known && formal_size_known && charlen >= 0
3693 4264 : && a->expr->ts.type == BT_CHARACTER
3694 4264 : && f->sym->attr.flavor != FL_PROCEDURE
3695 4264 : && !f->sym->attr.dimension)
3696 3717 : actual_size = charlen;
3697 :
3698 244182 : if (actual_size_known && formal_size_known
3699 183581 : && actual_size != formal_size
3700 3904 : && a->expr->ts.type == BT_CHARACTER
3701 256 : && f->sym->attr.flavor != FL_PROCEDURE)
3702 : {
3703 : /* F2018:15.5.2.4:
3704 : (3) "The length type parameter values of a present actual argument
3705 : shall agree with the corresponding ones of the dummy argument that
3706 : are not assumed, except for the case of the character length
3707 : parameter of an actual argument of type character with default
3708 : kind or C character kind associated with a dummy argument that is
3709 : not assumed-shape or assumed-rank."
3710 :
3711 : (4) "If a present scalar dummy argument is of type character with
3712 : default kind or C character kind, the length len of the dummy
3713 : argument shall be less than or equal to the length of the actual
3714 : argument. The dummy argument becomes associated with the leftmost
3715 : len characters of the actual argument. If a present array dummy
3716 : argument is of type character with default kind or C character
3717 : kind and is not assumed-shape or assumed-rank, it becomes
3718 : associated with the leftmost characters of the actual argument
3719 : element sequence."
3720 :
3721 : As an extension we treat kind=4 character similarly to kind=1. */
3722 :
3723 256 : if (actual_size > formal_size)
3724 : {
3725 175 : if (a->expr->ts.type == BT_CHARACTER && where
3726 175 : && (!f->sym->as || f->sym->as->type == AS_EXPLICIT))
3727 175 : gfc_warning (OPT_Wcharacter_truncation,
3728 : "Character length of actual argument longer "
3729 : "than of dummy argument %qs (%lu/%lu) at %L",
3730 : f->sym->name, actual_size, formal_size,
3731 : &a->expr->where);
3732 175 : goto skip_size_check;
3733 : }
3734 :
3735 81 : if (a->expr->ts.type == BT_CHARACTER && where && !f->sym->as)
3736 : {
3737 : /* Emit warning for -std=legacy/gnu and an error otherwise. */
3738 57 : if (gfc_notification_std (GFC_STD_LEGACY) == ERROR)
3739 : {
3740 11 : gfc_error ("Character length of actual argument shorter "
3741 : "than of dummy argument %qs (%lu/%lu) at %L",
3742 11 : f->sym->name, actual_size, formal_size,
3743 11 : &a->expr->where);
3744 11 : ok = false;
3745 11 : goto match;
3746 : }
3747 : else
3748 46 : gfc_warning (0, "Character length of actual argument shorter "
3749 : "than of dummy argument %qs (%lu/%lu) at %L",
3750 46 : f->sym->name, actual_size, formal_size,
3751 46 : &a->expr->where);
3752 46 : goto skip_size_check;
3753 : }
3754 : }
3755 :
3756 243950 : if (actual_size_known && formal_size_known
3757 183349 : && actual_size < formal_size
3758 54 : && f->sym->as
3759 48 : && a->expr->ts.type != BT_PROCEDURE
3760 48 : && f->sym->attr.flavor != FL_PROCEDURE)
3761 : {
3762 48 : if (where)
3763 : {
3764 : /* Emit a warning for -std=legacy and an error otherwise. */
3765 48 : if (gfc_option.warn_std == 0)
3766 0 : gfc_warning (0, "Actual argument contains too few "
3767 : "elements for dummy argument %qs (%lu/%lu) "
3768 : "at %L", f->sym->name, actual_size,
3769 : formal_size, &a->expr->where);
3770 : else
3771 48 : gfc_error_now ("Actual argument contains too few "
3772 : "elements for dummy argument %qs (%lu/%lu) "
3773 : "at %L", f->sym->name, actual_size,
3774 : formal_size, &a->expr->where);
3775 : }
3776 48 : ok = false;
3777 48 : goto match;
3778 : }
3779 :
3780 243902 : skip_size_check:
3781 :
3782 : /* Satisfy either: F03:12.4.1.3 by ensuring that a procedure pointer
3783 : actual argument is provided for a procedure pointer formal argument;
3784 : or: F08:12.5.2.9 (F18:15.5.2.10) by ensuring that the effective
3785 : argument shall be an external, internal, module, or dummy procedure.
3786 : The interfaces are checked elsewhere. */
3787 258643 : if (f->sym->attr.proc_pointer
3788 258643 : && !((a->expr->expr_type == EXPR_VARIABLE
3789 200 : && (a->expr->symtree->n.sym->attr.proc_pointer
3790 31 : || gfc_is_proc_ptr_comp (a->expr)))
3791 16 : || (a->expr->ts.type == BT_PROCEDURE
3792 10 : && f->sym->ts.interface)
3793 6 : || (a->expr->expr_type == EXPR_FUNCTION
3794 6 : && is_procptr_result (a->expr))))
3795 : {
3796 0 : if (where)
3797 0 : gfc_error ("Expected a procedure pointer for argument %qs at %L",
3798 0 : f->sym->name, &a->expr->where);
3799 0 : ok = false;
3800 0 : goto match;
3801 : }
3802 :
3803 : /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is
3804 : provided for a procedure formal argument. */
3805 258643 : if (f->sym->attr.flavor == FL_PROCEDURE
3806 258643 : && !((a->expr->expr_type == EXPR_VARIABLE
3807 1968 : && (a->expr->symtree->n.sym->attr.flavor == FL_PROCEDURE
3808 32 : || a->expr->symtree->n.sym->attr.proc_pointer
3809 32 : || gfc_is_proc_ptr_comp (a->expr)))
3810 30 : || (a->expr->expr_type == EXPR_FUNCTION
3811 21 : && is_procptr_result (a->expr))))
3812 : {
3813 12 : if (where)
3814 6 : gfc_error ("Expected a procedure for argument %qs at %L",
3815 6 : f->sym->name, &a->expr->where);
3816 12 : ok = false;
3817 12 : goto match;
3818 : }
3819 :
3820 : /* F23:15.5.2.5, para 2: A procedure pointer actual argument cannot correspond
3821 : to a data-object dummy argument (reverse of the two checks above).
3822 : Only flag EXPR_VARIABLE to avoid false positives on function calls
3823 : through procedure pointer components (e.g. o%f(args)). */
3824 258631 : if (!f->sym->attr.proc_pointer
3825 258425 : && f->sym->attr.flavor != FL_PROCEDURE
3826 256648 : && a->expr->expr_type == EXPR_VARIABLE
3827 365093 : && (a->expr->symtree->n.sym->attr.proc_pointer
3828 106455 : || gfc_is_proc_ptr_comp (a->expr)))
3829 : {
3830 8 : if (where)
3831 2 : gfc_error ("Procedure pointer actual argument at %L cannot "
3832 : "be passed to data-object dummy argument %qs",
3833 2 : &a->expr->where, f->sym->name);
3834 8 : ok = false;
3835 8 : goto match;
3836 : }
3837 :
3838 : /* Class array variables and expressions store array info in a
3839 : different place from non-class objects; consolidate the logic
3840 : to access it here instead of repeating it below. Note that
3841 : pointer_arg and allocatable_arg are not fully general and are
3842 : only used in a specific situation below with an assumed-rank
3843 : argument. */
3844 258623 : if (f->sym->ts.type == BT_CLASS && CLASS_DATA (f->sym))
3845 : {
3846 14263 : gfc_component *classdata = CLASS_DATA (f->sym);
3847 14263 : fas = classdata->as;
3848 14263 : pointer_dummy = classdata->attr.class_pointer;
3849 14263 : }
3850 : else
3851 : {
3852 244360 : fas = f->sym->as;
3853 244360 : pointer_dummy = f->sym->attr.pointer;
3854 : }
3855 :
3856 258623 : if (a->expr->expr_type != EXPR_VARIABLE
3857 150204 : && !(a->expr->expr_type == EXPR_NULL
3858 758 : && a->expr->ts.type != BT_UNKNOWN))
3859 : {
3860 : aas = NULL;
3861 : pointer_arg = false;
3862 : allocatable_arg = false;
3863 : }
3864 108920 : else if (a->expr->ts.type == BT_CLASS
3865 6691 : && a->expr->symtree->n.sym
3866 6691 : && CLASS_DATA (a->expr->symtree->n.sym))
3867 : {
3868 6688 : gfc_component *classdata = CLASS_DATA (a->expr->symtree->n.sym);
3869 6688 : aas = classdata->as;
3870 6688 : pointer_arg = classdata->attr.class_pointer;
3871 6688 : allocatable_arg = classdata->attr.allocatable;
3872 6688 : }
3873 : else
3874 : {
3875 102232 : aas = a->expr->symtree->n.sym->as;
3876 102232 : pointer_arg = a->expr->symtree->n.sym->attr.pointer;
3877 102232 : allocatable_arg = a->expr->symtree->n.sym->attr.allocatable;
3878 : }
3879 :
3880 : /* F2018:9.5.2(2) permits assumed-size whole array expressions as
3881 : actual arguments only if the shape is not required; thus it
3882 : cannot be passed to an assumed-shape array dummy.
3883 : F2018:15.5.2.(2) permits passing a nonpointer actual to an
3884 : intent(in) pointer dummy argument and this is accepted by
3885 : the compare_pointer check below, but this also requires shape
3886 : information.
3887 : There's more discussion of this in PR94110. */
3888 258623 : if (fas
3889 43555 : && (fas->type == AS_ASSUMED_SHAPE
3890 43555 : || fas->type == AS_DEFERRED
3891 21974 : || (fas->type == AS_ASSUMED_RANK && pointer_dummy))
3892 22643 : && aas
3893 17876 : && aas->type == AS_ASSUMED_SIZE
3894 14 : && (a->expr->ref == NULL
3895 14 : || (a->expr->ref->type == REF_ARRAY
3896 14 : && a->expr->ref->u.ar.type == AR_FULL)))
3897 : {
3898 10 : if (where)
3899 10 : gfc_error ("Actual argument for %qs cannot be an assumed-size"
3900 : " array at %L", f->sym->name, where);
3901 10 : ok = false;
3902 10 : goto match;
3903 : }
3904 :
3905 : /* Diagnose F2018 C839 (TS29113 C535c). Here the problem is
3906 : passing an assumed-size array to an INTENT(OUT) assumed-rank
3907 : dummy when it doesn't have the size information needed to run
3908 : initializers and finalizers. */
3909 258613 : if (f->sym->attr.intent == INTENT_OUT
3910 6681 : && fas
3911 1247 : && fas->type == AS_ASSUMED_RANK
3912 276 : && aas
3913 223 : && ((aas->type == AS_ASSUMED_SIZE
3914 61 : && (a->expr->ref == NULL
3915 61 : || (a->expr->ref->type == REF_ARRAY
3916 61 : && a->expr->ref->u.ar.type == AR_FULL)))
3917 173 : || (aas->type == AS_ASSUMED_RANK
3918 : && !pointer_arg
3919 34 : && !allocatable_arg))
3920 258681 : && (a->expr->ts.type == BT_CLASS
3921 62 : || (a->expr->ts.type == BT_DERIVED
3922 16 : && (gfc_is_finalizable (a->expr->ts.u.derived, NULL)
3923 14 : || gfc_has_ultimate_allocatable (a->expr)
3924 12 : || gfc_has_default_initializer
3925 12 : (a->expr->ts.u.derived)))))
3926 : {
3927 12 : if (where)
3928 12 : gfc_error ("Actual argument to assumed-rank INTENT(OUT) "
3929 : "dummy %qs at %L cannot be of unknown size",
3930 12 : f->sym->name, where);
3931 12 : ok = false;
3932 12 : goto match;
3933 : }
3934 :
3935 258601 : if (a->expr->expr_type != EXPR_NULL)
3936 : {
3937 257843 : int cmp = compare_pointer (f->sym, a->expr);
3938 257843 : bool pre2008 = ((gfc_option.allow_std & GFC_STD_F2008) == 0);
3939 :
3940 257843 : if (pre2008 && cmp == 0)
3941 : {
3942 1 : if (where)
3943 1 : gfc_error ("Actual argument for %qs at %L must be a pointer",
3944 1 : f->sym->name, &a->expr->where);
3945 1 : ok = false;
3946 1 : goto match;
3947 : }
3948 :
3949 257842 : if (pre2008 && cmp == 2)
3950 : {
3951 3 : if (where)
3952 3 : gfc_error ("Fortran 2008: Non-pointer actual argument at %L to "
3953 3 : "pointer dummy %qs", &a->expr->where, f->sym->name);
3954 3 : ok = false;
3955 3 : goto match;
3956 : }
3957 :
3958 257839 : if (!pre2008 && cmp == 0)
3959 : {
3960 11 : if (where)
3961 5 : gfc_error ("Actual argument for %qs at %L must be a pointer "
3962 : "or a valid target for the dummy pointer in a "
3963 : "pointer assignment statement",
3964 5 : f->sym->name, &a->expr->where);
3965 11 : ok = false;
3966 11 : goto match;
3967 : }
3968 : }
3969 :
3970 :
3971 : /* Fortran 2008, C1242. */
3972 258586 : if (f->sym->attr.pointer && gfc_is_coindexed (a->expr))
3973 : {
3974 2 : if (where)
3975 2 : gfc_error ("Coindexed actual argument at %L to pointer "
3976 : "dummy %qs",
3977 2 : &a->expr->where, f->sym->name);
3978 2 : ok = false;
3979 2 : goto match;
3980 : }
3981 :
3982 : /* Fortran 2008, 12.5.2.5 (no constraint). */
3983 258584 : if (a->expr->expr_type == EXPR_VARIABLE
3984 108381 : && f->sym->attr.intent != INTENT_IN
3985 61989 : && f->sym->attr.allocatable
3986 261511 : && gfc_is_coindexed (a->expr))
3987 : {
3988 1 : if (where)
3989 1 : gfc_error ("Coindexed actual argument at %L to allocatable "
3990 : "dummy %qs requires INTENT(IN)",
3991 1 : &a->expr->where, f->sym->name);
3992 1 : ok = false;
3993 1 : goto match;
3994 : }
3995 :
3996 : /* Fortran 2008, C1237. */
3997 258583 : if (a->expr->expr_type == EXPR_VARIABLE
3998 108380 : && (f->sym->attr.asynchronous || f->sym->attr.volatile_)
3999 65 : && gfc_is_coindexed (a->expr)
4000 258585 : && (a->expr->symtree->n.sym->attr.volatile_
4001 1 : || a->expr->symtree->n.sym->attr.asynchronous))
4002 : {
4003 2 : if (where)
4004 2 : gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at "
4005 : "%L requires that dummy %qs has neither "
4006 : "ASYNCHRONOUS nor VOLATILE", &a->expr->where,
4007 2 : f->sym->name);
4008 2 : ok = false;
4009 2 : goto match;
4010 : }
4011 :
4012 : /* Fortran 2008, 12.5.2.4 (no constraint). */
4013 258581 : if (a->expr->expr_type == EXPR_VARIABLE
4014 108378 : && f->sym->attr.intent != INTENT_IN && !f->sym->attr.value
4015 57498 : && gfc_is_coindexed (a->expr)
4016 258592 : && gfc_has_ultimate_allocatable (a->expr))
4017 : {
4018 1 : if (where)
4019 1 : gfc_error ("Coindexed actual argument at %L with allocatable "
4020 : "ultimate component to dummy %qs requires either VALUE "
4021 1 : "or INTENT(IN)", &a->expr->where, f->sym->name);
4022 1 : ok = false;
4023 1 : goto match;
4024 : }
4025 :
4026 258580 : if (f->sym->ts.type == BT_CLASS
4027 14255 : && CLASS_DATA (f->sym)->attr.allocatable
4028 886 : && gfc_is_class_array_ref (a->expr, &full_array)
4029 259025 : && !full_array)
4030 : {
4031 0 : if (where)
4032 0 : gfc_error ("Actual CLASS array argument for %qs must be a full "
4033 0 : "array at %L", f->sym->name, &a->expr->where);
4034 0 : ok = false;
4035 0 : goto match;
4036 : }
4037 :
4038 :
4039 258580 : if (a->expr->expr_type != EXPR_NULL
4040 258580 : && !compare_allocatable (f->sym, a->expr))
4041 : {
4042 9 : if (where)
4043 9 : gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L",
4044 9 : f->sym->name, &a->expr->where);
4045 9 : ok = false;
4046 9 : goto match;
4047 : }
4048 :
4049 258571 : if (a->expr->expr_type == EXPR_FUNCTION
4050 15209 : && a->expr->value.function.esym
4051 5033 : && f->sym->attr.allocatable)
4052 : {
4053 4 : if (where)
4054 4 : gfc_error ("Actual argument for %qs at %L is a function result "
4055 : "and the dummy argument is ALLOCATABLE",
4056 : f->sym->name, &a->expr->where);
4057 4 : ok = false;
4058 4 : goto match;
4059 : }
4060 :
4061 : /* Check intent = OUT/INOUT for definable actual argument. */
4062 258567 : if (!in_statement_function
4063 258092 : && (f->sym->attr.intent == INTENT_OUT
4064 251425 : || f->sym->attr.intent == INTENT_INOUT))
4065 : {
4066 10944 : const char* context = (where
4067 10944 : ? _("actual argument to INTENT = OUT/INOUT")
4068 : : NULL);
4069 :
4070 2879 : if (((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok
4071 2879 : && CLASS_DATA (f->sym)->attr.class_pointer)
4072 10924 : || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer))
4073 11134 : && !gfc_check_vardef_context (a->expr, true, false, false, context))
4074 : {
4075 6 : ok = false;
4076 6 : goto match;
4077 : }
4078 10938 : if (!gfc_check_vardef_context (a->expr, false, false, false, context))
4079 : {
4080 21 : ok = false;
4081 21 : goto match;
4082 : }
4083 : }
4084 : /* F2023: 15.5.2.5 Ordinary dummy variables:
4085 : "(21) If the procedure is nonelemental, the dummy argument does not
4086 : have the VALUE attribute, and the actual argument is an array section
4087 : having a vector subscript, the dummy argument is not definable and
4088 : shall not have the ASYNCHRONOUS, INTENT (OUT), INTENT (INOUT), or
4089 : VOLATILE attributes."
4090 : */
4091 258540 : if ((f->sym->attr.intent == INTENT_OUT
4092 251881 : || f->sym->attr.intent == INTENT_INOUT
4093 247621 : || f->sym->attr.volatile_
4094 247585 : || f->sym->attr.asynchronous)
4095 10983 : && !f->sym->attr.value
4096 10983 : && !is_elemental
4097 265798 : && gfc_has_vector_subscript (a->expr))
4098 : {
4099 3 : if (where)
4100 3 : gfc_error ("Array-section actual argument with vector "
4101 : "subscripts at %L is incompatible with INTENT(OUT), "
4102 : "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute "
4103 : "of the dummy argument %qs",
4104 3 : &a->expr->where, f->sym->name);
4105 3 : ok = false;
4106 3 : goto match;
4107 : }
4108 :
4109 : /* C1232 (R1221) For an actual argument which is an array section or
4110 : an assumed-shape array, the dummy argument shall be an assumed-
4111 : shape array, if the dummy argument has the VOLATILE attribute. */
4112 :
4113 258537 : if (f->sym->attr.volatile_
4114 37 : && a->expr->expr_type == EXPR_VARIABLE
4115 34 : && a->expr->symtree->n.sym->as
4116 29 : && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SHAPE
4117 2 : && !(fas && fas->type == AS_ASSUMED_SHAPE))
4118 : {
4119 1 : if (where)
4120 1 : gfc_error ("Assumed-shape actual argument at %L is "
4121 : "incompatible with the non-assumed-shape "
4122 : "dummy argument %qs due to VOLATILE attribute",
4123 : &a->expr->where,f->sym->name);
4124 1 : ok = false;
4125 1 : goto match;
4126 : }
4127 :
4128 : /* Find the last array_ref. */
4129 258536 : actual_arr_ref = NULL;
4130 258536 : if (a->expr->ref)
4131 46403 : actual_arr_ref = gfc_find_array_ref (a->expr, true);
4132 :
4133 258536 : if (f->sym->attr.volatile_
4134 36 : && actual_arr_ref && actual_arr_ref->type == AR_SECTION
4135 5 : && !(fas && fas->type == AS_ASSUMED_SHAPE))
4136 : {
4137 1 : if (where)
4138 1 : gfc_error ("Array-section actual argument at %L is "
4139 : "incompatible with the non-assumed-shape "
4140 : "dummy argument %qs due to VOLATILE attribute",
4141 1 : &a->expr->where, f->sym->name);
4142 1 : ok = false;
4143 1 : goto match;
4144 : }
4145 :
4146 : /* C1233 (R1221) For an actual argument which is a pointer array, the
4147 : dummy argument shall be an assumed-shape or pointer array, if the
4148 : dummy argument has the VOLATILE attribute. */
4149 :
4150 258535 : if (f->sym->attr.volatile_
4151 35 : && a->expr->expr_type == EXPR_VARIABLE
4152 32 : && a->expr->symtree->n.sym->attr.pointer
4153 17 : && a->expr->symtree->n.sym->as
4154 17 : && !(fas
4155 17 : && (fas->type == AS_ASSUMED_SHAPE
4156 6 : || f->sym->attr.pointer)))
4157 : {
4158 3 : if (where)
4159 2 : gfc_error ("Pointer-array actual argument at %L requires "
4160 : "an assumed-shape or pointer-array dummy "
4161 : "argument %qs due to VOLATILE attribute",
4162 : &a->expr->where,f->sym->name);
4163 3 : ok = false;
4164 3 : goto match;
4165 : }
4166 :
4167 : /* C_LOC/C_FUNLOC from ISO_C_BINDING as actual argument can only be
4168 : passed to a dummy argument of matching type C_PTR/C_FUNPTR. */
4169 258532 : if (a->expr->expr_type == EXPR_FUNCTION
4170 15202 : && a->expr->ts.type == BT_VOID
4171 5 : && a->expr->symtree->n.sym
4172 5 : && a->expr->symtree->n.sym->from_intmod == INTMOD_ISO_C_BINDING
4173 5 : && (f->sym->ts.type != BT_DERIVED
4174 3 : || f->sym->ts.u.derived->from_intmod != INTMOD_ISO_C_BINDING
4175 3 : || !((a->expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_FUNLOC
4176 1 : && f->sym->ts.u.derived->intmod_sym_id == ISOCBINDING_FUNPTR)
4177 : || (a->expr->symtree->n.sym->intmod_sym_id == ISOCBINDING_LOC
4178 2 : && f->sym->ts.u.derived->intmod_sym_id == ISOCBINDING_PTR))))
4179 : {
4180 3 : if (where)
4181 0 : gfc_error ("ISO_C_BINDING function actual argument at %L "
4182 : "requires dummy argument %qs to have a matching "
4183 : "type from ISO_C_BINDING",
4184 : &a->expr->where,f->sym->name);
4185 3 : ok = false;
4186 3 : goto match;
4187 : }
4188 :
4189 258529 : match:
4190 365243 : if (a == actual)
4191 177336 : na = i;
4192 :
4193 365243 : new_arg[i++] = a;
4194 : }
4195 :
4196 : /* Give up now if we saw any bad argument. */
4197 177495 : if (!ok)
4198 : return false;
4199 :
4200 : /* Make sure missing actual arguments are optional. */
4201 : i = 0;
4202 359164 : for (f = formal; f; f = f->next, i++)
4203 : {
4204 247764 : if (new_arg[i] != NULL)
4205 242096 : continue;
4206 5668 : if (f->sym == NULL)
4207 : {
4208 1 : if (where)
4209 1 : gfc_error ("Missing alternate return spec in subroutine call "
4210 : "at %L", where);
4211 1 : return false;
4212 : }
4213 : /* For CLASS, the optional attribute might be set at either location. */
4214 5667 : if (((f->sym->ts.type != BT_CLASS || !CLASS_DATA (f->sym)->attr.optional)
4215 5667 : && !f->sym->attr.optional)
4216 5581 : || (in_statement_function
4217 1 : && (f->sym->attr.optional
4218 0 : || (f->sym->ts.type == BT_CLASS
4219 0 : && CLASS_DATA (f->sym)->attr.optional))))
4220 : {
4221 87 : if (where)
4222 4 : gfc_error ("Missing actual argument for argument %qs at %L",
4223 : f->sym->name, where);
4224 87 : return false;
4225 : }
4226 : }
4227 :
4228 : /* We should have handled the cases where the formal arglist is null
4229 : already. */
4230 111400 : gcc_assert (n > 0);
4231 :
4232 : /* The argument lists are compatible. We now relink a new actual
4233 : argument list with null arguments in the right places. The head
4234 : of the list remains the head. */
4235 358997 : for (f = formal, i = 0; f; f = f->next, i++)
4236 247597 : if (new_arg[i] == NULL)
4237 : {
4238 5580 : new_arg[i] = gfc_get_actual_arglist ();
4239 5580 : new_arg[i]->associated_dummy = get_nonintrinsic_dummy_arg (f);
4240 : }
4241 :
4242 111400 : if (na != 0)
4243 : {
4244 385 : std::swap (*new_arg[0], *actual);
4245 385 : std::swap (new_arg[0], new_arg[na]);
4246 : }
4247 :
4248 247597 : for (i = 0; i < n - 1; i++)
4249 136197 : new_arg[i]->next = new_arg[i + 1];
4250 :
4251 111400 : new_arg[i]->next = NULL;
4252 :
4253 111400 : if (*ap == NULL && n > 0)
4254 796 : *ap = new_arg[0];
4255 :
4256 111400 : if (!in_statement_function)
4257 358238 : for (f = formal, i = 0; f; f = f->next, i++)
4258 : {
4259 247122 : if (new_arg[i]->expr)
4260 : {
4261 241333 : gfc_expr *e = new_arg[i]->expr;
4262 :
4263 241333 : if (f->sym->attr.value)
4264 : {
4265 21981 : gfc_value_used_expr (e, VALUE_VALUE_ARG);
4266 21981 : continue;
4267 : }
4268 219352 : switch (f->sym->attr.intent)
4269 : {
4270 6532 : case INTENT_OUT:
4271 6532 : {
4272 6532 : gfc_expr_set_at (e, &e->where, VALUE_INTENT_OUT);
4273 6532 : if (f->sym->attr.allocatable)
4274 419 : gfc_used_in_allocate_expr (e, &e->where, ALLOCATED_ARG);
4275 :
4276 : }
4277 : break;
4278 :
4279 115533 : case INTENT_IN:
4280 115533 : gfc_value_used_expr (e, VALUE_INTENT_IN);
4281 115533 : break;
4282 :
4283 97287 : case INTENT_INOUT:
4284 97287 : case INTENT_UNKNOWN:
4285 97287 : gfc_value_set_and_used (e, &e->where, VALUE_ARG,
4286 : VALUE_MAYBE_USED);
4287 :
4288 97287 : if (f->sym->attr.allocatable)
4289 2564 : gfc_used_in_allocate_expr (e, &e->where, ALLOCATED_ARG);
4290 : break;
4291 : }
4292 : }
4293 : }
4294 :
4295 : return true;
4296 : }
4297 :
4298 :
4299 : typedef struct
4300 : {
4301 : gfc_formal_arglist *f;
4302 : gfc_actual_arglist *a;
4303 : }
4304 : argpair;
4305 :
4306 : /* qsort comparison function for argument pairs, with the following
4307 : order:
4308 : - p->a->expr == NULL
4309 : - p->a->expr->expr_type != EXPR_VARIABLE
4310 : - by gfc_symbol pointer value (larger first). */
4311 :
4312 : static int
4313 2345 : pair_cmp (const void *p1, const void *p2)
4314 : {
4315 2345 : const gfc_actual_arglist *a1, *a2;
4316 :
4317 : /* *p1 and *p2 are elements of the to-be-sorted array. */
4318 2345 : a1 = ((const argpair *) p1)->a;
4319 2345 : a2 = ((const argpair *) p2)->a;
4320 2345 : if (!a1->expr)
4321 : {
4322 23 : if (!a2->expr)
4323 : return 0;
4324 23 : return -1;
4325 : }
4326 2322 : if (!a2->expr)
4327 : return 1;
4328 2313 : if (a1->expr->expr_type != EXPR_VARIABLE)
4329 : {
4330 1658 : if (a2->expr->expr_type != EXPR_VARIABLE)
4331 : return 0;
4332 1110 : return -1;
4333 : }
4334 655 : if (a2->expr->expr_type != EXPR_VARIABLE)
4335 : return 1;
4336 195 : if (a1->expr->symtree->n.sym > a2->expr->symtree->n.sym)
4337 : return -1;
4338 79 : return a1->expr->symtree->n.sym < a2->expr->symtree->n.sym;
4339 : }
4340 :
4341 :
4342 : /* Given two expressions from some actual arguments, test whether they
4343 : refer to the same expression. The analysis is conservative.
4344 : Returning false will produce no warning. */
4345 :
4346 : static bool
4347 43 : compare_actual_expr (gfc_expr *e1, gfc_expr *e2)
4348 : {
4349 43 : const gfc_ref *r1, *r2;
4350 :
4351 43 : if (!e1 || !e2
4352 43 : || e1->expr_type != EXPR_VARIABLE
4353 43 : || e2->expr_type != EXPR_VARIABLE
4354 43 : || e1->symtree->n.sym != e2->symtree->n.sym)
4355 : return false;
4356 :
4357 : /* TODO: improve comparison, see expr.cc:show_ref(). */
4358 4 : for (r1 = e1->ref, r2 = e2->ref; r1 && r2; r1 = r1->next, r2 = r2->next)
4359 : {
4360 1 : if (r1->type != r2->type)
4361 : return false;
4362 1 : switch (r1->type)
4363 : {
4364 0 : case REF_ARRAY:
4365 0 : if (r1->u.ar.type != r2->u.ar.type)
4366 : return false;
4367 : /* TODO: At the moment, consider only full arrays;
4368 : we could do better. */
4369 0 : if (r1->u.ar.type != AR_FULL || r2->u.ar.type != AR_FULL)
4370 : return false;
4371 : break;
4372 :
4373 0 : case REF_COMPONENT:
4374 0 : if (r1->u.c.component != r2->u.c.component)
4375 : return false;
4376 : break;
4377 :
4378 : case REF_SUBSTRING:
4379 : return false;
4380 :
4381 1 : case REF_INQUIRY:
4382 1 : if (e1->symtree->n.sym->ts.type == BT_COMPLEX
4383 1 : && e1->ts.type == BT_REAL && e2->ts.type == BT_REAL
4384 1 : && r1->u.i != r2->u.i)
4385 : return false;
4386 : break;
4387 :
4388 0 : default:
4389 0 : gfc_internal_error ("compare_actual_expr(): Bad component code");
4390 : }
4391 : }
4392 3 : if (!r1 && !r2)
4393 : return true;
4394 : return false;
4395 : }
4396 :
4397 :
4398 : /* Given formal and actual argument lists that correspond to one
4399 : another, check that identical actual arguments aren't not
4400 : associated with some incompatible INTENTs. */
4401 :
4402 : static bool
4403 740 : check_some_aliasing (gfc_formal_arglist *f, gfc_actual_arglist *a)
4404 : {
4405 740 : sym_intent f1_intent, f2_intent;
4406 740 : gfc_formal_arglist *f1;
4407 740 : gfc_actual_arglist *a1;
4408 740 : size_t n, i, j;
4409 740 : argpair *p;
4410 740 : bool t = true;
4411 :
4412 740 : n = 0;
4413 740 : for (f1 = f, a1 = a;; f1 = f1->next, a1 = a1->next)
4414 : {
4415 1939 : if (f1 == NULL && a1 == NULL)
4416 : break;
4417 1199 : if (f1 == NULL || a1 == NULL)
4418 0 : gfc_internal_error ("check_some_aliasing(): List mismatch");
4419 1199 : n++;
4420 : }
4421 740 : if (n == 0)
4422 : return t;
4423 657 : p = XALLOCAVEC (argpair, n);
4424 :
4425 1856 : for (i = 0, f1 = f, a1 = a; i < n; i++, f1 = f1->next, a1 = a1->next)
4426 : {
4427 1199 : p[i].f = f1;
4428 1199 : p[i].a = a1;
4429 : }
4430 :
4431 657 : qsort (p, n, sizeof (argpair), pair_cmp);
4432 :
4433 2513 : for (i = 0; i < n; i++)
4434 : {
4435 1199 : if (!p[i].a->expr
4436 1194 : || p[i].a->expr->expr_type != EXPR_VARIABLE
4437 572 : || p[i].a->expr->ts.type == BT_PROCEDURE)
4438 628 : continue;
4439 571 : f1_intent = p[i].f->sym->attr.intent;
4440 574 : for (j = i + 1; j < n; j++)
4441 : {
4442 : /* Expected order after the sort. */
4443 43 : if (!p[j].a->expr || p[j].a->expr->expr_type != EXPR_VARIABLE)
4444 0 : gfc_internal_error ("check_some_aliasing(): corrupted data");
4445 :
4446 : /* Are the expression the same? */
4447 43 : if (!compare_actual_expr (p[i].a->expr, p[j].a->expr))
4448 : break;
4449 3 : f2_intent = p[j].f->sym->attr.intent;
4450 3 : if ((f1_intent == INTENT_IN && f2_intent == INTENT_OUT)
4451 2 : || (f1_intent == INTENT_OUT && f2_intent == INTENT_IN)
4452 1 : || (f1_intent == INTENT_OUT && f2_intent == INTENT_OUT))
4453 : {
4454 3 : gfc_warning (0, "Same actual argument associated with INTENT(%s) "
4455 : "argument %qs and INTENT(%s) argument %qs at %L",
4456 3 : gfc_intent_string (f1_intent), p[i].f->sym->name,
4457 : gfc_intent_string (f2_intent), p[j].f->sym->name,
4458 : &p[i].a->expr->where);
4459 3 : t = false;
4460 : }
4461 : }
4462 : }
4463 :
4464 : return t;
4465 : }
4466 :
4467 :
4468 : /* Given formal and actual argument lists that correspond to one
4469 : another, check that they are compatible in the sense that intents
4470 : are not mismatched. */
4471 :
4472 : static bool
4473 114931 : check_intents (gfc_formal_arglist *f, gfc_actual_arglist *a)
4474 : {
4475 334881 : sym_intent f_intent;
4476 :
4477 554831 : for (;; f = f->next, a = a->next)
4478 : {
4479 334881 : gfc_expr *expr;
4480 :
4481 334881 : if (f == NULL && a == NULL)
4482 : break;
4483 219954 : if (f == NULL || a == NULL)
4484 0 : gfc_internal_error ("check_intents(): List mismatch");
4485 :
4486 219954 : if (a->expr && a->expr->expr_type == EXPR_FUNCTION
4487 12744 : && a->expr->value.function.isym
4488 7685 : && a->expr->value.function.isym->id == GFC_ISYM_CAF_GET)
4489 0 : expr = a->expr->value.function.actual->expr;
4490 : else
4491 : expr = a->expr;
4492 :
4493 219954 : if (expr == NULL || expr->expr_type != EXPR_VARIABLE)
4494 127638 : continue;
4495 :
4496 92316 : f_intent = f->sym->attr.intent;
4497 :
4498 92316 : if (gfc_pure (NULL) && gfc_impure_variable (expr->symtree->n.sym))
4499 : {
4500 412 : if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok
4501 16 : && CLASS_DATA (f->sym)->attr.class_pointer)
4502 411 : || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer))
4503 : {
4504 2 : gfc_error ("Procedure argument at %L is local to a PURE "
4505 : "procedure and has the POINTER attribute",
4506 : &expr->where);
4507 2 : return false;
4508 : }
4509 : }
4510 :
4511 : /* Fortran 2008, C1283. */
4512 92314 : if (gfc_pure (NULL) && gfc_is_coindexed (expr))
4513 : {
4514 1 : if (f_intent == INTENT_INOUT || f_intent == INTENT_OUT)
4515 : {
4516 1 : gfc_error ("Coindexed actual argument at %L in PURE procedure "
4517 : "is passed to an INTENT(%s) argument",
4518 : &expr->where, gfc_intent_string (f_intent));
4519 1 : return false;
4520 : }
4521 :
4522 0 : if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok
4523 0 : && CLASS_DATA (f->sym)->attr.class_pointer)
4524 0 : || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer))
4525 : {
4526 0 : gfc_error ("Coindexed actual argument at %L in PURE procedure "
4527 : "is passed to a POINTER dummy argument",
4528 : &expr->where);
4529 0 : return false;
4530 : }
4531 : }
4532 :
4533 : /* F2008, Section 12.5.2.4. */
4534 6556 : if (expr->ts.type == BT_CLASS && f->sym->ts.type == BT_CLASS
4535 98169 : && gfc_is_coindexed (expr))
4536 : {
4537 1 : gfc_error ("Coindexed polymorphic actual argument at %L is passed "
4538 : "polymorphic dummy argument %qs",
4539 1 : &expr->where, f->sym->name);
4540 1 : return false;
4541 : }
4542 219950 : }
4543 :
4544 : return true;
4545 : }
4546 :
4547 :
4548 : /* Check how a procedure is used against its interface. If all goes
4549 : well, the actual argument list will also end up being properly
4550 : sorted. */
4551 :
4552 : bool
4553 104896 : gfc_procedure_use (gfc_symbol *sym, gfc_actual_arglist **ap, locus *where)
4554 : {
4555 104896 : gfc_actual_arglist *a;
4556 104896 : gfc_formal_arglist *dummy_args;
4557 104896 : bool implicit = false;
4558 :
4559 : /* Warn about calls with an implicit interface. Special case
4560 : for calling a ISO_C_BINDING because c_loc and c_funloc
4561 : are pseudo-unknown. Additionally, warn about procedures not
4562 : explicitly declared at all if requested. */
4563 104896 : if (sym->attr.if_source == IFSRC_UNKNOWN && !sym->attr.is_iso_c)
4564 : {
4565 16458 : bool has_implicit_none_export = false;
4566 16458 : implicit = true;
4567 16458 : if (sym->attr.proc == PROC_UNKNOWN)
4568 23300 : for (gfc_namespace *ns = sym->ns; ns; ns = ns->parent)
4569 11744 : if (ns->has_implicit_none_export)
4570 : {
4571 : has_implicit_none_export = true;
4572 : break;
4573 : }
4574 11560 : if (has_implicit_none_export)
4575 : {
4576 4 : const char *guessed
4577 4 : = gfc_lookup_function_fuzzy (sym->name, sym->ns->sym_root);
4578 4 : if (guessed)
4579 1 : gfc_error ("Procedure %qs called at %L is not explicitly declared"
4580 : "; did you mean %qs?",
4581 : sym->name, where, guessed);
4582 : else
4583 3 : gfc_error ("Procedure %qs called at %L is not explicitly declared",
4584 : sym->name, where);
4585 4 : return false;
4586 : }
4587 16454 : if (warn_implicit_interface)
4588 0 : gfc_warning (OPT_Wimplicit_interface,
4589 : "Procedure %qs called with an implicit interface at %L",
4590 : sym->name, where);
4591 16454 : else if (warn_implicit_procedure && sym->attr.proc == PROC_UNKNOWN)
4592 1 : gfc_warning (OPT_Wimplicit_procedure,
4593 : "Procedure %qs called at %L is not explicitly declared",
4594 : sym->name, where);
4595 16454 : gfc_find_proc_namespace (sym->ns)->implicit_interface_calls = 1;
4596 : }
4597 :
4598 104892 : if (sym->attr.if_source == IFSRC_UNKNOWN)
4599 : {
4600 16454 : if (sym->attr.pointer)
4601 : {
4602 1 : gfc_error ("The pointer object %qs at %L must have an explicit "
4603 : "function interface or be declared as array",
4604 : sym->name, where);
4605 1 : return false;
4606 : }
4607 :
4608 16453 : if (sym->attr.allocatable && !sym->attr.external)
4609 : {
4610 1 : gfc_error ("The allocatable object %qs at %L must have an explicit "
4611 : "function interface or be declared as array",
4612 : sym->name, where);
4613 1 : return false;
4614 : }
4615 :
4616 16452 : if (sym->attr.allocatable)
4617 : {
4618 1 : gfc_error ("Allocatable function %qs at %L must have an explicit "
4619 : "function interface", sym->name, where);
4620 1 : return false;
4621 : }
4622 :
4623 46914 : for (a = *ap; a; a = a->next)
4624 : {
4625 30478 : if (a->expr && a->expr->error)
4626 : return false;
4627 :
4628 : /* F2018, 15.4.2.2 Explicit interface is required for a
4629 : polymorphic dummy argument, so there is no way to
4630 : legally have a class appear in an argument with an
4631 : implicit interface. */
4632 :
4633 30478 : if (implicit && a->expr && a->expr->ts.type == BT_CLASS)
4634 : {
4635 3 : gfc_error ("Explicit interface required for polymorphic "
4636 : "argument at %L",&a->expr->where);
4637 3 : a->expr->error = 1;
4638 3 : break;
4639 : }
4640 :
4641 : /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
4642 30475 : if (a->name != NULL && a->name[0] != '%')
4643 : {
4644 2 : gfc_error ("Keyword argument requires explicit interface "
4645 : "for procedure %qs at %L", sym->name, &a->expr->where);
4646 2 : break;
4647 : }
4648 :
4649 : /* TS 29113, 6.2. */
4650 30473 : if (a->expr && a->expr->ts.type == BT_ASSUMED
4651 3 : && sym->intmod_sym_id != ISOCBINDING_LOC)
4652 : {
4653 3 : gfc_error ("Assumed-type argument %s at %L requires an explicit "
4654 3 : "interface", a->expr->symtree->n.sym->name,
4655 : &a->expr->where);
4656 3 : a->expr->error = 1;
4657 3 : break;
4658 : }
4659 :
4660 : /* F2008, C1303 and C1304. */
4661 30470 : if (a->expr
4662 30295 : && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS)
4663 73 : && a->expr->ts.u.derived
4664 30541 : && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
4665 1 : && a->expr->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE)
4666 70 : || gfc_expr_attr (a->expr).lock_comp))
4667 : {
4668 1 : gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE "
4669 : "component at %L requires an explicit interface for "
4670 1 : "procedure %qs", &a->expr->where, sym->name);
4671 1 : a->expr->error = 1;
4672 1 : break;
4673 : }
4674 :
4675 30469 : if (a->expr
4676 30294 : && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS)
4677 72 : && a->expr->ts.u.derived
4678 30539 : && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV
4679 0 : && a->expr->ts.u.derived->intmod_sym_id
4680 : == ISOFORTRAN_EVENT_TYPE)
4681 70 : || gfc_expr_attr (a->expr).event_comp))
4682 : {
4683 0 : gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE "
4684 : "component at %L requires an explicit interface for "
4685 0 : "procedure %qs", &a->expr->where, sym->name);
4686 0 : a->expr->error = 1;
4687 0 : break;
4688 : }
4689 :
4690 30469 : if (a->expr && a->expr->expr_type == EXPR_NULL
4691 2 : && a->expr->ts.type == BT_UNKNOWN)
4692 : {
4693 1 : gfc_error ("MOLD argument to NULL required at %L",
4694 : &a->expr->where);
4695 1 : a->expr->error = 1;
4696 1 : return false;
4697 : }
4698 :
4699 30468 : if (a->expr && a->expr->expr_type == EXPR_NULL)
4700 : {
4701 1 : gfc_error ("Passing intrinsic NULL as actual argument at %L "
4702 : "requires an explicit interface", &a->expr->where);
4703 1 : a->expr->error = 1;
4704 1 : return false;
4705 : }
4706 :
4707 : /* TS 29113, C407b. */
4708 30292 : if (a->expr && a->expr->expr_type == EXPR_VARIABLE
4709 43763 : && gfc_symbol_rank (a->expr->symtree->n.sym) == -1)
4710 : {
4711 4 : gfc_error ("Assumed-rank argument requires an explicit interface "
4712 4 : "at %L", &a->expr->where);
4713 4 : a->expr->error = 1;
4714 4 : return false;
4715 : }
4716 : }
4717 :
4718 16445 : if (implicit)
4719 46917 : for (a = *ap; a; a = a->next)
4720 30472 : if (a->expr)
4721 30297 : gfc_value_set_and_used (a->expr, &a->expr->where, VALUE_ARG,
4722 : VALUE_MAYBE_USED);
4723 :
4724 16445 : return true;
4725 : }
4726 :
4727 88438 : dummy_args = gfc_sym_get_dummy_args (sym);
4728 :
4729 : /* For a statement function, check that types and type parameters of actual
4730 : arguments and dummy arguments match. */
4731 88438 : if (!gfc_compare_actual_formal (ap, dummy_args, 0, sym->attr.elemental,
4732 88438 : sym->attr.proc == PROC_ST_FUNCTION, where))
4733 : return false;
4734 :
4735 87999 : if (!check_intents (dummy_args, *ap))
4736 : return false;
4737 :
4738 87995 : if (warn_aliasing)
4739 728 : check_some_aliasing (dummy_args, *ap);
4740 :
4741 : return true;
4742 : }
4743 :
4744 :
4745 : /* Check how a procedure pointer component is used against its interface.
4746 : If all goes well, the actual argument list will also end up being properly
4747 : sorted. Completely analogous to gfc_procedure_use. */
4748 :
4749 : void
4750 583 : gfc_ppc_use (gfc_component *comp, gfc_actual_arglist **ap, locus *where)
4751 : {
4752 : /* Warn about calls with an implicit interface. Special case
4753 : for calling a ISO_C_BINDING because c_loc and c_funloc
4754 : are pseudo-unknown. */
4755 583 : if (warn_implicit_interface
4756 0 : && comp->attr.if_source == IFSRC_UNKNOWN
4757 0 : && !comp->attr.is_iso_c)
4758 0 : gfc_warning (OPT_Wimplicit_interface,
4759 : "Procedure pointer component %qs called with an implicit "
4760 : "interface at %L", comp->name, where);
4761 :
4762 583 : if (comp->attr.if_source == IFSRC_UNKNOWN)
4763 : {
4764 60 : gfc_actual_arglist *a;
4765 105 : for (a = *ap; a; a = a->next)
4766 : {
4767 : /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */
4768 45 : if (a->name != NULL && a->name[0] != '%')
4769 : {
4770 0 : gfc_error ("Keyword argument requires explicit interface "
4771 : "for procedure pointer component %qs at %L",
4772 0 : comp->name, &a->expr->where);
4773 0 : break;
4774 : }
4775 : }
4776 :
4777 60 : return;
4778 : }
4779 :
4780 523 : if (!gfc_compare_actual_formal (ap, comp->ts.interface->formal, 0,
4781 523 : comp->attr.elemental, false, where))
4782 : return;
4783 :
4784 523 : check_intents (comp->ts.interface->formal, *ap);
4785 523 : if (warn_aliasing)
4786 0 : check_some_aliasing (comp->ts.interface->formal, *ap);
4787 : }
4788 :
4789 :
4790 : /* Try if an actual argument list matches the formal list of a symbol,
4791 : respecting the symbol's attributes like ELEMENTAL. This is used for
4792 : GENERIC resolution. */
4793 :
4794 : bool
4795 93194 : gfc_arglist_matches_symbol (gfc_actual_arglist** args, gfc_symbol* sym)
4796 : {
4797 93194 : gfc_formal_arglist *dummy_args;
4798 93194 : bool r;
4799 :
4800 93194 : if (sym->attr.flavor != FL_PROCEDURE)
4801 : return false;
4802 :
4803 93190 : dummy_args = gfc_sym_get_dummy_args (sym);
4804 :
4805 93190 : r = !sym->attr.elemental;
4806 93190 : if (gfc_compare_actual_formal (args, dummy_args, r, !r, false, NULL))
4807 : {
4808 26409 : check_intents (dummy_args, *args);
4809 26409 : if (warn_aliasing)
4810 12 : check_some_aliasing (dummy_args, *args);
4811 26409 : return true;
4812 : }
4813 :
4814 : return false;
4815 : }
4816 :
4817 :
4818 : /* Given an interface pointer and an actual argument list, search for
4819 : a formal argument list that matches the actual. If found, returns
4820 : a pointer to the symbol of the correct interface. Returns NULL if
4821 : not found. */
4822 :
4823 : gfc_symbol *
4824 46350 : gfc_search_interface (gfc_interface *intr, int sub_flag,
4825 : gfc_actual_arglist **ap)
4826 : {
4827 46350 : gfc_symbol *elem_sym = NULL;
4828 46350 : gfc_symbol *null_sym = NULL;
4829 46350 : locus null_expr_loc;
4830 46350 : gfc_actual_arglist *a;
4831 46350 : bool has_null_arg = false;
4832 :
4833 128693 : for (a = *ap; a; a = a->next)
4834 82472 : if (a->expr && a->expr->expr_type == EXPR_NULL
4835 175 : && a->expr->ts.type == BT_UNKNOWN)
4836 : {
4837 129 : has_null_arg = true;
4838 129 : null_expr_loc = a->expr->where;
4839 129 : break;
4840 : }
4841 :
4842 132710 : for (; intr; intr = intr->next)
4843 : {
4844 97785 : if (gfc_fl_struct (intr->sym->attr.flavor))
4845 6658 : continue;
4846 91127 : if (sub_flag && intr->sym->attr.function)
4847 0 : continue;
4848 84105 : if (!sub_flag && intr->sym->attr.subroutine)
4849 0 : continue;
4850 :
4851 91127 : if (gfc_arglist_matches_symbol (ap, intr->sym))
4852 : {
4853 25148 : if (has_null_arg && null_sym)
4854 : {
4855 2 : gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity "
4856 : "between specific functions %s and %s",
4857 2 : &null_expr_loc, null_sym->name, intr->sym->name);
4858 2 : return NULL;
4859 : }
4860 25146 : else if (has_null_arg)
4861 : {
4862 4 : null_sym = intr->sym;
4863 4 : continue;
4864 : }
4865 :
4866 : /* Satisfy 12.4.4.1 such that an elemental match has lower
4867 : weight than a non-elemental match. */
4868 25142 : if (intr->sym->attr.elemental)
4869 : {
4870 13719 : elem_sym = intr->sym;
4871 13719 : continue;
4872 : }
4873 : return intr->sym;
4874 : }
4875 : }
4876 :
4877 34925 : if (null_sym)
4878 2 : return null_sym;
4879 :
4880 : return elem_sym ? elem_sym : NULL;
4881 : }
4882 :
4883 :
4884 : /* Do a brute force recursive search for a symbol. */
4885 :
4886 : static gfc_symtree *
4887 58860 : find_symtree0 (gfc_symtree *root, gfc_symbol *sym)
4888 : {
4889 113804 : gfc_symtree * st;
4890 :
4891 113804 : if (root == NULL || root->n.sym == sym)
4892 : return root;
4893 :
4894 112763 : st = NULL;
4895 112763 : if (root->left)
4896 57753 : st = find_symtree0 (root->left, sym);
4897 112763 : if (root->right && ! st)
4898 : st = find_symtree0 (root->right, sym);
4899 : return st;
4900 : }
4901 :
4902 :
4903 : /* Find a symtree for a symbol. */
4904 :
4905 : gfc_symtree *
4906 5693 : gfc_find_sym_in_symtree (gfc_symbol *sym)
4907 : {
4908 5693 : gfc_symtree *st;
4909 5693 : gfc_namespace *ns;
4910 :
4911 : /* First try to find it by name. */
4912 5693 : gfc_find_sym_tree (sym->name, gfc_current_ns, 1, &st);
4913 5693 : if (st && st->n.sym == sym)
4914 : return st;
4915 :
4916 : /* If it's been renamed, resort to a brute-force search. */
4917 : /* TODO: avoid having to do this search. If the symbol doesn't exist
4918 : in the symtree for the current namespace, it should probably be added. */
4919 1104 : for (ns = gfc_current_ns; ns; ns = ns->parent)
4920 : {
4921 1104 : st = find_symtree0 (ns->sym_root, sym);
4922 1104 : if (st)
4923 : return st;
4924 :
4925 : /* Search user-defined operators. */
4926 66 : if (ns->uop_root && sym->attr.function)
4927 : {
4928 3 : st = find_symtree0 (ns->uop_root, sym);
4929 3 : if (st)
4930 : return st;
4931 : }
4932 : }
4933 0 : gfc_internal_error ("Unable to find symbol %qs", sym->name);
4934 : /* Not reached. */
4935 : }
4936 :
4937 :
4938 : /* See if the arglist to an operator-call contains a derived-type argument
4939 : with a matching type-bound operator. If so, return the matching specific
4940 : procedure defined as operator-target as well as the base-object to use
4941 : (which is the found derived-type argument with operator). The generic
4942 : name, if any, is transmitted to the final expression via 'gname'. */
4943 :
4944 : static gfc_typebound_proc*
4945 13736 : matching_typebound_op (gfc_expr** tb_base,
4946 : gfc_actual_arglist* args,
4947 : gfc_intrinsic_op op, const char* uop,
4948 : const char ** gname)
4949 : {
4950 13736 : gfc_actual_arglist* base;
4951 :
4952 39447 : for (base = args; base; base = base->next)
4953 26539 : if (base->expr->ts.type == BT_DERIVED || base->expr->ts.type == BT_CLASS)
4954 : {
4955 : gfc_typebound_proc* tb;
4956 : gfc_symbol* derived;
4957 : bool result;
4958 :
4959 22504 : while (base->expr->expr_type == EXPR_OP
4960 22504 : && base->expr->value.op.op == INTRINSIC_PARENTHESES)
4961 123 : base->expr = base->expr->value.op.op1;
4962 :
4963 22381 : if (base->expr->ts.type == BT_CLASS)
4964 : {
4965 1936 : if (!base->expr->ts.u.derived || CLASS_DATA (base->expr) == NULL
4966 3869 : || !gfc_expr_attr (base->expr).class_ok)
4967 87 : continue;
4968 1850 : derived = CLASS_DATA (base->expr)->ts.u.derived;
4969 : }
4970 : else
4971 20444 : derived = base->expr->ts.u.derived;
4972 :
4973 : /* A use associated derived type is resolvable during parsing. */
4974 22294 : if (derived && derived->attr.use_assoc && !gfc_current_ns->resolved)
4975 4125 : gfc_resolve_symbol (derived);
4976 :
4977 22294 : if (op == INTRINSIC_USER)
4978 : {
4979 228 : gfc_symtree* tb_uop;
4980 :
4981 228 : gcc_assert (uop);
4982 228 : tb_uop = gfc_find_typebound_user_op (derived, &result, uop,
4983 : false, NULL);
4984 :
4985 228 : if (tb_uop)
4986 84 : tb = tb_uop->n.tb;
4987 : else
4988 : tb = NULL;
4989 : }
4990 : else
4991 22066 : tb = gfc_find_typebound_intrinsic_op (derived, &result, op,
4992 : false, NULL);
4993 :
4994 : /* This means we hit a PRIVATE operator which is use-associated and
4995 : should thus not be seen. */
4996 22294 : if (!result)
4997 21316 : tb = NULL;
4998 :
4999 : /* Look through the super-type hierarchy for a matching specific
5000 : binding. */
5001 22444 : for (; tb; tb = tb->overridden)
5002 : {
5003 978 : gfc_tbp_generic* g;
5004 :
5005 978 : gcc_assert (tb->is_generic);
5006 1550 : for (g = tb->u.generic; g; g = g->next)
5007 : {
5008 1400 : gfc_symbol* target;
5009 1400 : gfc_actual_arglist* argcopy;
5010 1400 : bool matches;
5011 :
5012 : /* If expression matching comes here during parsing, eg. when
5013 : parsing ASSOCIATE, generic TBPs have not yet been resolved
5014 : and g->specific will not have been set. Wait for expression
5015 : resolution by returning NULL. */
5016 1400 : if (!g->specific && !gfc_current_ns->resolved)
5017 828 : return NULL;
5018 :
5019 1400 : gcc_assert (g->specific);
5020 1400 : if (g->specific->error)
5021 0 : continue;
5022 :
5023 1400 : target = g->specific->u.specific->n.sym;
5024 :
5025 : /* Check if this arglist matches the formal. */
5026 1400 : argcopy = gfc_copy_actual_arglist (args);
5027 1400 : matches = gfc_arglist_matches_symbol (&argcopy, target);
5028 1400 : gfc_free_actual_arglist (argcopy);
5029 :
5030 : /* Return if we found a match. */
5031 1400 : if (matches)
5032 : {
5033 828 : *tb_base = base->expr;
5034 828 : *gname = g->specific_st->name;
5035 828 : return g->specific;
5036 : }
5037 : }
5038 : }
5039 : }
5040 :
5041 : return NULL;
5042 : }
5043 :
5044 :
5045 : /* For the 'actual arglist' of an operator call and a specific typebound
5046 : procedure that has been found the target of a type-bound operator, build the
5047 : appropriate EXPR_COMPCALL and resolve it. We take this indirection over
5048 : type-bound procedures rather than resolving type-bound operators 'directly'
5049 : so that we can reuse the existing logic. */
5050 :
5051 : static void
5052 828 : build_compcall_for_operator (gfc_expr* e, gfc_actual_arglist* actual,
5053 : gfc_expr* base, gfc_typebound_proc* target,
5054 : const char *gname)
5055 : {
5056 828 : e->expr_type = EXPR_COMPCALL;
5057 828 : e->value.compcall.tbp = target;
5058 828 : e->value.compcall.name = gname ? gname : "$op";
5059 828 : e->value.compcall.actual = actual;
5060 828 : e->value.compcall.base_object = base;
5061 828 : e->value.compcall.ignore_pass = 1;
5062 828 : e->value.compcall.assign = 0;
5063 828 : if (e->ts.type == BT_UNKNOWN
5064 810 : && target->function)
5065 : {
5066 361 : if (target->is_generic)
5067 0 : e->ts = target->u.generic->specific->u.specific->n.sym->ts;
5068 : else
5069 361 : e->ts = target->u.specific->n.sym->ts;
5070 : }
5071 828 : }
5072 :
5073 :
5074 : /* This subroutine is called when an expression is being resolved.
5075 : The expression node in question is either a user defined operator
5076 : or an intrinsic operator with arguments that aren't compatible
5077 : with the operator. This subroutine builds an actual argument list
5078 : corresponding to the operands, then searches for a compatible
5079 : interface. If one is found, the expression node is replaced with
5080 : the appropriate function call. We use the 'match' enum to specify
5081 : whether a replacement has been made or not, or if an error occurred. */
5082 :
5083 : match
5084 2233 : gfc_extend_expr (gfc_expr *e)
5085 : {
5086 2233 : gfc_actual_arglist *actual;
5087 2233 : gfc_symbol *sym;
5088 2233 : gfc_namespace *ns;
5089 2233 : gfc_user_op *uop;
5090 2233 : gfc_intrinsic_op i;
5091 2233 : const char *gname;
5092 2233 : gfc_typebound_proc* tbo;
5093 2233 : gfc_expr* tb_base;
5094 :
5095 2233 : sym = NULL;
5096 :
5097 2233 : actual = gfc_get_actual_arglist ();
5098 2233 : actual->expr = e->value.op.op1;
5099 :
5100 2233 : gname = NULL;
5101 :
5102 2233 : if (e->value.op.op2 != NULL)
5103 : {
5104 2006 : actual->next = gfc_get_actual_arglist ();
5105 2006 : actual->next->expr = e->value.op.op2;
5106 : }
5107 :
5108 2233 : i = fold_unary_intrinsic (e->value.op.op);
5109 :
5110 : /* See if we find a matching type-bound operator. */
5111 2219 : if (i == INTRINSIC_USER)
5112 329 : tbo = matching_typebound_op (&tb_base, actual,
5113 329 : i, e->value.op.uop->name, &gname);
5114 : else
5115 1904 : switch (i)
5116 : {
5117 : #define CHECK_OS_COMPARISON(comp) \
5118 : case INTRINSIC_##comp: \
5119 : case INTRINSIC_##comp##_OS: \
5120 : tbo = matching_typebound_op (&tb_base, actual, \
5121 : INTRINSIC_##comp, NULL, &gname); \
5122 : if (!tbo) \
5123 : tbo = matching_typebound_op (&tb_base, actual, \
5124 : INTRINSIC_##comp##_OS, NULL, &gname); \
5125 : break;
5126 193 : CHECK_OS_COMPARISON(EQ)
5127 828 : CHECK_OS_COMPARISON(NE)
5128 41 : CHECK_OS_COMPARISON(GT)
5129 40 : CHECK_OS_COMPARISON(GE)
5130 78 : CHECK_OS_COMPARISON(LT)
5131 40 : CHECK_OS_COMPARISON(LE)
5132 : #undef CHECK_OS_COMPARISON
5133 :
5134 684 : default:
5135 684 : tbo = matching_typebound_op (&tb_base, actual, i, NULL, &gname);
5136 684 : break;
5137 : }
5138 :
5139 : /* If there is a matching typebound-operator, replace the expression with
5140 : a call to it and succeed. */
5141 2229 : if (tbo)
5142 : {
5143 379 : gcc_assert (tb_base);
5144 379 : build_compcall_for_operator (e, actual, tb_base, tbo, gname);
5145 :
5146 379 : if (!gfc_resolve_expr (e))
5147 : return MATCH_ERROR;
5148 : else
5149 : return MATCH_YES;
5150 : }
5151 :
5152 1854 : if (i == INTRINSIC_USER)
5153 : {
5154 279 : for (ns = gfc_current_ns; ns; ns = ns->parent)
5155 : {
5156 269 : uop = gfc_find_uop (e->value.op.uop->name, ns);
5157 269 : if (uop == NULL)
5158 6 : continue;
5159 :
5160 263 : sym = gfc_search_interface (uop->op, 0, &actual);
5161 263 : if (sym != NULL)
5162 : break;
5163 : }
5164 : }
5165 : else
5166 : {
5167 1923 : for (ns = gfc_current_ns; ns; ns = ns->parent)
5168 : {
5169 : /* Due to the distinction between '==' and '.eq.' and friends, one has
5170 : to check if either is defined. */
5171 1683 : switch (i)
5172 : {
5173 : #define CHECK_OS_COMPARISON(comp) \
5174 : case INTRINSIC_##comp: \
5175 : case INTRINSIC_##comp##_OS: \
5176 : sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \
5177 : if (!sym) \
5178 : sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \
5179 : break;
5180 196 : CHECK_OS_COMPARISON(EQ)
5181 872 : CHECK_OS_COMPARISON(NE)
5182 41 : CHECK_OS_COMPARISON(GT)
5183 40 : CHECK_OS_COMPARISON(GE)
5184 65 : CHECK_OS_COMPARISON(LT)
5185 40 : CHECK_OS_COMPARISON(LE)
5186 : #undef CHECK_OS_COMPARISON
5187 :
5188 429 : default:
5189 429 : sym = gfc_search_interface (ns->op[i], 0, &actual);
5190 : }
5191 :
5192 1449 : if (sym != NULL)
5193 : break;
5194 : }
5195 :
5196 : /* F2018(15.4.3.4.2) requires that the use of unlimited polymorphic
5197 : formal arguments does not override the intrinsic uses. */
5198 1608 : gfc_push_suppress_errors ();
5199 1608 : if (sym
5200 1368 : && (UNLIMITED_POLY (sym->formal->sym)
5201 1358 : || (sym->formal->next
5202 1332 : && UNLIMITED_POLY (sym->formal->next->sym)))
5203 1618 : && !gfc_check_operator_interface (sym, e->value.op.op, e->where))
5204 0 : sym = NULL;
5205 1608 : gfc_pop_suppress_errors ();
5206 : }
5207 :
5208 : /* TODO: Do an ambiguity-check and error if multiple matching interfaces are
5209 : found rather than just taking the first one and not checking further. */
5210 :
5211 1854 : if (sym == NULL)
5212 : {
5213 : /* Don't use gfc_free_actual_arglist(). */
5214 250 : free (actual->next);
5215 250 : free (actual);
5216 250 : return MATCH_NO;
5217 : }
5218 :
5219 : /* Change the expression node to a function call. */
5220 1604 : e->expr_type = EXPR_FUNCTION;
5221 1604 : e->symtree = gfc_find_sym_in_symtree (sym);
5222 1604 : e->value.function.actual = actual;
5223 1604 : e->value.function.esym = NULL;
5224 1604 : e->value.function.isym = NULL;
5225 1604 : e->value.function.name = NULL;
5226 1604 : e->user_operator = 1;
5227 :
5228 1604 : if (!gfc_resolve_expr (e))
5229 : return MATCH_ERROR;
5230 :
5231 : return MATCH_YES;
5232 : }
5233 :
5234 :
5235 : /* Tries to replace an assignment code node with a subroutine call to the
5236 : subroutine associated with the assignment operator. Return true if the node
5237 : was replaced. On false, no error is generated. */
5238 :
5239 : bool
5240 287703 : gfc_extend_assign (gfc_code *c, gfc_namespace *ns)
5241 : {
5242 287703 : gfc_actual_arglist *actual;
5243 287703 : gfc_expr *lhs, *rhs, *tb_base;
5244 287703 : gfc_symbol *sym = NULL;
5245 287703 : const char *gname = NULL;
5246 287703 : gfc_typebound_proc* tbo;
5247 :
5248 287703 : lhs = c->expr1;
5249 287703 : rhs = c->expr2;
5250 :
5251 : /* Don't allow an intrinsic assignment with a BOZ rhs to be replaced. */
5252 287703 : if (c->op == EXEC_ASSIGN
5253 287703 : && c->expr1->expr_type == EXPR_VARIABLE
5254 287703 : && c->expr2->expr_type == EXPR_CONSTANT && c->expr2->ts.type == BT_BOZ)
5255 : return false;
5256 :
5257 : /* Don't allow an intrinsic assignment to be replaced. */
5258 279650 : if (lhs->ts.type != BT_DERIVED && lhs->ts.type != BT_CLASS
5259 278536 : && (rhs->rank == 0 || rhs->rank == lhs->rank)
5260 566212 : && (lhs->ts.type == rhs->ts.type
5261 6901 : || (gfc_numeric_ts (&lhs->ts) && gfc_numeric_ts (&rhs->ts))))
5262 277413 : return false;
5263 :
5264 10287 : actual = gfc_get_actual_arglist ();
5265 10287 : actual->expr = lhs;
5266 :
5267 10287 : actual->next = gfc_get_actual_arglist ();
5268 10287 : actual->next->expr = rhs;
5269 :
5270 : /* TODO: Ambiguity-check, see above for gfc_extend_expr. */
5271 :
5272 : /* See if we find a matching type-bound assignment. */
5273 10287 : tbo = matching_typebound_op (&tb_base, actual, INTRINSIC_ASSIGN,
5274 : NULL, &gname);
5275 :
5276 10287 : if (tbo)
5277 : {
5278 : /* Success: Replace the expression with a type-bound call. */
5279 449 : gcc_assert (tb_base);
5280 449 : c->expr1 = gfc_get_expr ();
5281 449 : build_compcall_for_operator (c->expr1, actual, tb_base, tbo, gname);
5282 449 : c->expr1->value.compcall.assign = 1;
5283 449 : c->expr1->where = c->loc;
5284 449 : c->expr2 = NULL;
5285 449 : c->op = EXEC_COMPCALL;
5286 449 : return true;
5287 : }
5288 :
5289 : /* See if we find an 'ordinary' (non-typebound) assignment procedure. */
5290 22989 : for (; ns; ns = ns->parent)
5291 : {
5292 13620 : sym = gfc_search_interface (ns->op[INTRINSIC_ASSIGN], 1, &actual);
5293 13620 : if (sym != NULL)
5294 : break;
5295 : }
5296 :
5297 9838 : if (sym)
5298 : {
5299 : /* Success: Replace the assignment with the call. */
5300 469 : c->op = EXEC_ASSIGN_CALL;
5301 469 : c->symtree = gfc_find_sym_in_symtree (sym);
5302 469 : c->expr1 = NULL;
5303 469 : c->expr2 = NULL;
5304 469 : c->ext.actual = actual;
5305 469 : return true;
5306 : }
5307 :
5308 : /* Failure: No assignment procedure found. */
5309 9369 : free (actual->next);
5310 9369 : free (actual);
5311 9369 : return false;
5312 : }
5313 :
5314 :
5315 : /* Make sure that the interface just parsed is not already present in
5316 : the given interface list. Ambiguity isn't checked yet since module
5317 : procedures can be present without interfaces. */
5318 :
5319 : bool
5320 10383 : gfc_check_new_interface (gfc_interface *base, gfc_symbol *new_sym, locus loc)
5321 : {
5322 10383 : gfc_interface *ip;
5323 :
5324 20222 : for (ip = base; ip; ip = ip->next)
5325 : {
5326 9846 : if (ip->sym == new_sym)
5327 : {
5328 7 : gfc_error ("Entity %qs at %L is already present in the interface",
5329 : new_sym->name, &loc);
5330 7 : return false;
5331 : }
5332 : }
5333 :
5334 : return true;
5335 : }
5336 :
5337 :
5338 : /* Add a symbol to the current interface. */
5339 :
5340 : bool
5341 19036 : gfc_add_interface (gfc_symbol *new_sym)
5342 : {
5343 19036 : gfc_interface **head, *intr;
5344 19036 : gfc_namespace *ns;
5345 19036 : gfc_symbol *sym;
5346 :
5347 19036 : switch (current_interface.type)
5348 : {
5349 : case INTERFACE_NAMELESS:
5350 : case INTERFACE_ABSTRACT:
5351 : return true;
5352 :
5353 672 : case INTERFACE_INTRINSIC_OP:
5354 1347 : for (ns = current_interface.ns; ns; ns = ns->parent)
5355 678 : switch (current_interface.op)
5356 : {
5357 75 : case INTRINSIC_EQ:
5358 75 : case INTRINSIC_EQ_OS:
5359 75 : if (!gfc_check_new_interface (ns->op[INTRINSIC_EQ], new_sym,
5360 : gfc_current_locus)
5361 75 : || !gfc_check_new_interface (ns->op[INTRINSIC_EQ_OS],
5362 : new_sym, gfc_current_locus))
5363 2 : return false;
5364 : break;
5365 :
5366 44 : case INTRINSIC_NE:
5367 44 : case INTRINSIC_NE_OS:
5368 44 : if (!gfc_check_new_interface (ns->op[INTRINSIC_NE], new_sym,
5369 : gfc_current_locus)
5370 44 : || !gfc_check_new_interface (ns->op[INTRINSIC_NE_OS],
5371 : new_sym, gfc_current_locus))
5372 0 : return false;
5373 : break;
5374 :
5375 19 : case INTRINSIC_GT:
5376 19 : case INTRINSIC_GT_OS:
5377 19 : if (!gfc_check_new_interface (ns->op[INTRINSIC_GT],
5378 : new_sym, gfc_current_locus)
5379 19 : || !gfc_check_new_interface (ns->op[INTRINSIC_GT_OS],
5380 : new_sym, gfc_current_locus))
5381 0 : return false;
5382 : break;
5383 :
5384 17 : case INTRINSIC_GE:
5385 17 : case INTRINSIC_GE_OS:
5386 17 : if (!gfc_check_new_interface (ns->op[INTRINSIC_GE],
5387 : new_sym, gfc_current_locus)
5388 17 : || !gfc_check_new_interface (ns->op[INTRINSIC_GE_OS],
5389 : new_sym, gfc_current_locus))
5390 0 : return false;
5391 : break;
5392 :
5393 29 : case INTRINSIC_LT:
5394 29 : case INTRINSIC_LT_OS:
5395 29 : if (!gfc_check_new_interface (ns->op[INTRINSIC_LT],
5396 : new_sym, gfc_current_locus)
5397 29 : || !gfc_check_new_interface (ns->op[INTRINSIC_LT_OS],
5398 : new_sym, gfc_current_locus))
5399 0 : return false;
5400 : break;
5401 :
5402 17 : case INTRINSIC_LE:
5403 17 : case INTRINSIC_LE_OS:
5404 17 : if (!gfc_check_new_interface (ns->op[INTRINSIC_LE],
5405 : new_sym, gfc_current_locus)
5406 17 : || !gfc_check_new_interface (ns->op[INTRINSIC_LE_OS],
5407 : new_sym, gfc_current_locus))
5408 0 : return false;
5409 : break;
5410 :
5411 477 : default:
5412 477 : if (!gfc_check_new_interface (ns->op[current_interface.op],
5413 : new_sym, gfc_current_locus))
5414 : return false;
5415 : }
5416 :
5417 669 : head = ¤t_interface.ns->op[current_interface.op];
5418 669 : break;
5419 :
5420 8968 : case INTERFACE_GENERIC:
5421 8968 : case INTERFACE_DTIO:
5422 17945 : for (ns = current_interface.ns; ns; ns = ns->parent)
5423 : {
5424 8978 : gfc_find_symbol (current_interface.sym->name, ns, 0, &sym);
5425 8978 : if (sym == NULL)
5426 11 : continue;
5427 :
5428 8967 : if (!gfc_check_new_interface (sym->generic,
5429 : new_sym, gfc_current_locus))
5430 : return false;
5431 : }
5432 :
5433 8967 : head = ¤t_interface.sym->generic;
5434 8967 : break;
5435 :
5436 169 : case INTERFACE_USER_OP:
5437 169 : if (!gfc_check_new_interface (current_interface.uop->op,
5438 : new_sym, gfc_current_locus))
5439 : return false;
5440 :
5441 168 : head = ¤t_interface.uop->op;
5442 168 : break;
5443 :
5444 0 : default:
5445 0 : gfc_internal_error ("gfc_add_interface(): Bad interface type");
5446 : }
5447 :
5448 9804 : intr = gfc_get_interface ();
5449 9804 : intr->sym = new_sym;
5450 9804 : intr->where = gfc_current_locus;
5451 :
5452 9804 : intr->next = *head;
5453 9804 : *head = intr;
5454 :
5455 9804 : return true;
5456 : }
5457 :
5458 :
5459 : gfc_interface *&
5460 94951 : gfc_current_interface_head (void)
5461 : {
5462 94951 : switch (current_interface.type)
5463 : {
5464 12183 : case INTERFACE_INTRINSIC_OP:
5465 12183 : return current_interface.ns->op[current_interface.op];
5466 :
5467 79868 : case INTERFACE_GENERIC:
5468 79868 : case INTERFACE_DTIO:
5469 79868 : return current_interface.sym->generic;
5470 :
5471 2900 : case INTERFACE_USER_OP:
5472 2900 : return current_interface.uop->op;
5473 :
5474 0 : default:
5475 0 : gcc_unreachable ();
5476 : }
5477 : }
5478 :
5479 :
5480 : void
5481 3 : gfc_set_current_interface_head (gfc_interface *i)
5482 : {
5483 3 : switch (current_interface.type)
5484 : {
5485 0 : case INTERFACE_INTRINSIC_OP:
5486 0 : current_interface.ns->op[current_interface.op] = i;
5487 0 : break;
5488 :
5489 3 : case INTERFACE_GENERIC:
5490 3 : case INTERFACE_DTIO:
5491 3 : current_interface.sym->generic = i;
5492 3 : break;
5493 :
5494 0 : case INTERFACE_USER_OP:
5495 0 : current_interface.uop->op = i;
5496 0 : break;
5497 :
5498 0 : default:
5499 0 : gcc_unreachable ();
5500 : }
5501 3 : }
5502 :
5503 :
5504 : /* Gets rid of a formal argument list. We do not free symbols.
5505 : Symbols are freed when a namespace is freed. */
5506 :
5507 : void
5508 6409414 : gfc_free_formal_arglist (gfc_formal_arglist *p)
5509 : {
5510 6409414 : gfc_formal_arglist *q;
5511 :
5512 7177909 : for (; p; p = q)
5513 : {
5514 768495 : q = p->next;
5515 768495 : free (p);
5516 : }
5517 6409414 : }
5518 :
5519 :
5520 : /* Check that it is ok for the type-bound procedure 'proc' to override the
5521 : procedure 'old', cf. F08:4.5.7.3. */
5522 :
5523 : bool
5524 1218 : gfc_check_typebound_override (gfc_symtree* proc, gfc_symtree* old)
5525 : {
5526 1218 : locus where;
5527 1218 : gfc_symbol *proc_target, *old_target;
5528 1218 : unsigned proc_pass_arg, old_pass_arg, argpos;
5529 1218 : gfc_formal_arglist *proc_formal, *old_formal;
5530 1218 : bool check_type;
5531 1218 : char err[200];
5532 :
5533 : /* This procedure should only be called for non-GENERIC proc. */
5534 1218 : gcc_assert (!proc->n.tb->is_generic);
5535 :
5536 : /* If the overwritten procedure is GENERIC, this is an error. */
5537 1218 : if (old->n.tb->is_generic)
5538 : {
5539 1 : gfc_error ("Cannot overwrite GENERIC %qs at %L",
5540 : old->name, &proc->n.tb->where);
5541 1 : return false;
5542 : }
5543 :
5544 1217 : where = proc->n.tb->where;
5545 1217 : proc_target = proc->n.tb->u.specific->n.sym;
5546 1217 : old_target = old->n.tb->u.specific->n.sym;
5547 :
5548 : /* Check that overridden binding is not NON_OVERRIDABLE. */
5549 1217 : if (old->n.tb->non_overridable)
5550 : {
5551 1 : gfc_error ("%qs at %L overrides a procedure binding declared"
5552 : " NON_OVERRIDABLE", proc->name, &where);
5553 1 : return false;
5554 : }
5555 :
5556 : /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */
5557 1216 : if (!old->n.tb->deferred && proc->n.tb->deferred)
5558 : {
5559 1 : gfc_error ("%qs at %L must not be DEFERRED as it overrides a"
5560 : " non-DEFERRED binding", proc->name, &where);
5561 1 : return false;
5562 : }
5563 :
5564 : /* If the overridden binding is PURE, the overriding must be, too. */
5565 1215 : if (old_target->attr.pure && !proc_target->attr.pure)
5566 : {
5567 2 : gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE",
5568 : proc->name, &where);
5569 2 : return false;
5570 : }
5571 :
5572 : /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it
5573 : is not, the overriding must not be either. */
5574 1213 : if (old_target->attr.elemental && !proc_target->attr.elemental)
5575 : {
5576 0 : gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be"
5577 : " ELEMENTAL", proc->name, &where);
5578 0 : return false;
5579 : }
5580 1213 : if (!old_target->attr.elemental && proc_target->attr.elemental)
5581 : {
5582 1 : gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not"
5583 : " be ELEMENTAL, either", proc->name, &where);
5584 1 : return false;
5585 : }
5586 :
5587 : /* If the overridden binding is a SUBROUTINE, the overriding must also be a
5588 : SUBROUTINE. */
5589 1212 : if (old_target->attr.subroutine && !proc_target->attr.subroutine)
5590 : {
5591 1 : gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a"
5592 : " SUBROUTINE", proc->name, &where);
5593 1 : return false;
5594 : }
5595 :
5596 : /* If the overridden binding is a FUNCTION, the overriding must also be a
5597 : FUNCTION and have the same characteristics. */
5598 1211 : if (old_target->attr.function)
5599 : {
5600 661 : if (!proc_target->attr.function)
5601 : {
5602 1 : gfc_error ("%qs at %L overrides a FUNCTION and must also be a"
5603 : " FUNCTION", proc->name, &where);
5604 1 : return false;
5605 : }
5606 :
5607 660 : if (!gfc_check_result_characteristics (proc_target, old_target,
5608 : err, sizeof(err)))
5609 : {
5610 6 : gfc_error ("Result mismatch for the overriding procedure "
5611 : "%qs at %L: %s", proc->name, &where, err);
5612 6 : return false;
5613 : }
5614 : }
5615 :
5616 : /* If the overridden binding is PUBLIC, the overriding one must not be
5617 : PRIVATE. */
5618 1204 : if (old->n.tb->access == ACCESS_PUBLIC
5619 1179 : && proc->n.tb->access == ACCESS_PRIVATE)
5620 : {
5621 1 : gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be"
5622 : " PRIVATE", proc->name, &where);
5623 1 : return false;
5624 : }
5625 :
5626 : /* Compare the formal argument lists of both procedures. This is also abused
5627 : to find the position of the passed-object dummy arguments of both
5628 : bindings as at least the overridden one might not yet be resolved and we
5629 : need those positions in the check below. */
5630 1203 : proc_pass_arg = old_pass_arg = 0;
5631 1203 : if (!proc->n.tb->nopass && !proc->n.tb->pass_arg)
5632 1203 : proc_pass_arg = 1;
5633 1203 : if (!old->n.tb->nopass && !old->n.tb->pass_arg)
5634 1203 : old_pass_arg = 1;
5635 1203 : argpos = 1;
5636 1203 : proc_formal = gfc_sym_get_dummy_args (proc_target);
5637 1203 : old_formal = gfc_sym_get_dummy_args (old_target);
5638 4342 : for ( ; proc_formal && old_formal;
5639 1936 : proc_formal = proc_formal->next, old_formal = old_formal->next)
5640 : {
5641 1943 : if (proc->n.tb->pass_arg
5642 493 : && !strcmp (proc->n.tb->pass_arg, proc_formal->sym->name))
5643 1943 : proc_pass_arg = argpos;
5644 1943 : if (old->n.tb->pass_arg
5645 495 : && !strcmp (old->n.tb->pass_arg, old_formal->sym->name))
5646 1943 : old_pass_arg = argpos;
5647 :
5648 : /* Check that the names correspond. */
5649 1943 : if (strcmp (proc_formal->sym->name, old_formal->sym->name))
5650 : {
5651 1 : gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as"
5652 : " to match the corresponding argument of the overridden"
5653 : " procedure", proc_formal->sym->name, proc->name, &where,
5654 : old_formal->sym->name);
5655 1 : return false;
5656 : }
5657 :
5658 1942 : check_type = proc_pass_arg != argpos && old_pass_arg != argpos;
5659 1942 : if (!gfc_check_dummy_characteristics (proc_formal->sym, old_formal->sym,
5660 : check_type, err, sizeof(err)))
5661 : {
5662 6 : gfc_error_opt (0, "Argument mismatch for the overriding procedure "
5663 : "%qs at %L: %s", proc->name, &where, err);
5664 6 : return false;
5665 : }
5666 :
5667 1936 : ++argpos;
5668 : }
5669 1196 : if (proc_formal || old_formal)
5670 : {
5671 1 : gfc_error ("%qs at %L must have the same number of formal arguments as"
5672 : " the overridden procedure", proc->name, &where);
5673 1 : return false;
5674 : }
5675 :
5676 : /* If the overridden binding is NOPASS, the overriding one must also be
5677 : NOPASS. */
5678 1195 : if (old->n.tb->nopass && !proc->n.tb->nopass)
5679 : {
5680 1 : gfc_error ("%qs at %L overrides a NOPASS binding and must also be"
5681 : " NOPASS", proc->name, &where);
5682 1 : return false;
5683 : }
5684 :
5685 : /* If the overridden binding is PASS(x), the overriding one must also be
5686 : PASS and the passed-object dummy arguments must correspond. */
5687 1194 : if (!old->n.tb->nopass)
5688 : {
5689 1160 : if (proc->n.tb->nopass)
5690 : {
5691 1 : gfc_error ("%qs at %L overrides a binding with PASS and must also be"
5692 : " PASS", proc->name, &where);
5693 1 : return false;
5694 : }
5695 :
5696 1159 : if (proc_pass_arg != old_pass_arg)
5697 : {
5698 1 : gfc_error ("Passed-object dummy argument of %qs at %L must be at"
5699 : " the same position as the passed-object dummy argument of"
5700 : " the overridden procedure", proc->name, &where);
5701 1 : return false;
5702 : }
5703 : }
5704 :
5705 : return true;
5706 : }
5707 :
5708 :
5709 : /* The following three functions check that the formal arguments
5710 : of user defined derived type IO procedures are compliant with
5711 : the requirements of the standard, see F03:9.5.3.7.2 (F08:9.6.4.8.3). */
5712 :
5713 : static void
5714 4572 : check_dtio_arg_TKR_intent (gfc_symbol *fsym, bool typebound, bt type,
5715 : int kind, int rank, sym_intent intent)
5716 : {
5717 4572 : if (fsym->ts.type != type)
5718 : {
5719 3 : gfc_error ("DTIO dummy argument at %L must be of type %s",
5720 : &fsym->declared_at, gfc_basic_typename (type));
5721 3 : return;
5722 : }
5723 :
5724 4569 : if (fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED
5725 3767 : && fsym->ts.kind != kind)
5726 1 : gfc_error ("DTIO dummy argument at %L must be of KIND = %d",
5727 : &fsym->declared_at, kind);
5728 :
5729 4569 : if (!typebound
5730 4569 : && rank == 0
5731 1148 : && (((type == BT_CLASS) && CLASS_DATA (fsym)->attr.dimension)
5732 950 : || ((type != BT_CLASS) && fsym->attr.dimension)))
5733 0 : gfc_error ("DTIO dummy argument at %L must be a scalar",
5734 : &fsym->declared_at);
5735 4569 : else if (rank == 1
5736 677 : && (fsym->as == NULL || fsym->as->type != AS_ASSUMED_SHAPE))
5737 1 : gfc_error ("DTIO dummy argument at %L must be an "
5738 : "ASSUMED SHAPE ARRAY", &fsym->declared_at);
5739 :
5740 4569 : if (type == BT_CHARACTER && fsym->ts.u.cl->length != NULL)
5741 1 : gfc_error ("DTIO character argument at %L must have assumed length",
5742 : &fsym->declared_at);
5743 :
5744 4569 : if (fsym->attr.intent != intent)
5745 1 : gfc_error ("DTIO dummy argument at %L must have INTENT %s",
5746 : &fsym->declared_at, gfc_code2string (intents, (int)intent));
5747 : return;
5748 : }
5749 :
5750 :
5751 : static void
5752 889 : check_dtio_interface1 (gfc_symbol *derived, gfc_symtree *tb_io_st,
5753 : bool typebound, bool formatted, int code)
5754 : {
5755 889 : gfc_symbol *dtio_sub, *generic_proc, *fsym;
5756 889 : gfc_typebound_proc *tb_io_proc, *specific_proc;
5757 889 : gfc_interface *intr;
5758 889 : gfc_formal_arglist *formal;
5759 889 : int arg_num;
5760 :
5761 889 : bool read = ((dtio_codes)code == DTIO_RF)
5762 889 : || ((dtio_codes)code == DTIO_RUF);
5763 889 : bt type;
5764 889 : sym_intent intent;
5765 889 : int kind;
5766 :
5767 889 : dtio_sub = NULL;
5768 889 : if (typebound)
5769 : {
5770 : /* Typebound DTIO binding. */
5771 559 : tb_io_proc = tb_io_st->n.tb;
5772 559 : if (tb_io_proc == NULL)
5773 : return;
5774 :
5775 559 : gcc_assert (tb_io_proc->is_generic);
5776 :
5777 559 : specific_proc = tb_io_proc->u.generic->specific;
5778 559 : if (specific_proc == NULL || specific_proc->is_generic)
5779 : return;
5780 :
5781 559 : dtio_sub = specific_proc->u.specific->n.sym;
5782 : }
5783 : else
5784 : {
5785 330 : generic_proc = tb_io_st->n.sym;
5786 330 : if (generic_proc == NULL || generic_proc->generic == NULL)
5787 : return;
5788 :
5789 407 : for (intr = tb_io_st->n.sym->generic; intr; intr = intr->next)
5790 : {
5791 334 : if (intr->sym && intr->sym->formal && intr->sym->formal->sym
5792 330 : && ((intr->sym->formal->sym->ts.type == BT_CLASS
5793 231 : && CLASS_DATA (intr->sym->formal->sym)->ts.u.derived
5794 : == derived)
5795 127 : || (intr->sym->formal->sym->ts.type == BT_DERIVED
5796 99 : && intr->sym->formal->sym->ts.u.derived == derived)))
5797 : {
5798 : dtio_sub = intr->sym;
5799 : break;
5800 : }
5801 80 : else if (intr->sym && intr->sym->formal && !intr->sym->formal->sym)
5802 : {
5803 1 : gfc_error ("Alternate return at %L is not permitted in a DTIO "
5804 : "procedure", &intr->sym->declared_at);
5805 1 : return;
5806 : }
5807 : }
5808 :
5809 327 : if (dtio_sub == NULL)
5810 : return;
5811 : }
5812 :
5813 559 : gcc_assert (dtio_sub);
5814 813 : if (!dtio_sub->attr.subroutine)
5815 0 : gfc_error ("DTIO procedure %qs at %L must be a subroutine",
5816 : dtio_sub->name, &dtio_sub->declared_at);
5817 :
5818 813 : if (!dtio_sub->resolve_symbol_called)
5819 1 : gfc_resolve_formal_arglist (dtio_sub);
5820 :
5821 813 : arg_num = 0;
5822 5416 : for (formal = dtio_sub->formal; formal; formal = formal->next)
5823 4603 : arg_num++;
5824 :
5825 944 : if (arg_num < (formatted ? 6 : 4))
5826 : {
5827 5 : gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L",
5828 : dtio_sub->name, &dtio_sub->declared_at);
5829 5 : return;
5830 : }
5831 :
5832 808 : if (arg_num > (formatted ? 6 : 4))
5833 : {
5834 3 : gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L",
5835 : dtio_sub->name, &dtio_sub->declared_at);
5836 3 : return;
5837 : }
5838 :
5839 : /* Now go through the formal arglist. */
5840 : arg_num = 1;
5841 5377 : for (formal = dtio_sub->formal; formal; formal = formal->next, arg_num++)
5842 : {
5843 4573 : if (!formatted && arg_num == 3)
5844 128 : arg_num = 5;
5845 4573 : fsym = formal->sym;
5846 :
5847 4573 : if (fsym == NULL)
5848 : {
5849 1 : gfc_error ("Alternate return at %L is not permitted in a DTIO "
5850 : "procedure", &dtio_sub->declared_at);
5851 1 : return;
5852 : }
5853 :
5854 4572 : switch (arg_num)
5855 : {
5856 805 : case(1): /* DTV */
5857 805 : type = derived->attr.sequence || derived->attr.is_bind_c ?
5858 : BT_DERIVED : BT_CLASS;
5859 805 : kind = 0;
5860 805 : intent = read ? INTENT_INOUT : INTENT_IN;
5861 805 : check_dtio_arg_TKR_intent (fsym, typebound, type, kind,
5862 : 0, intent);
5863 805 : break;
5864 :
5865 805 : case(2): /* UNIT */
5866 805 : type = BT_INTEGER;
5867 805 : kind = gfc_default_integer_kind;
5868 805 : intent = INTENT_IN;
5869 805 : check_dtio_arg_TKR_intent (fsym, typebound, type, kind,
5870 : 0, intent);
5871 805 : break;
5872 677 : case(3): /* IOTYPE */
5873 677 : type = BT_CHARACTER;
5874 677 : kind = gfc_default_character_kind;
5875 677 : intent = INTENT_IN;
5876 677 : check_dtio_arg_TKR_intent (fsym, typebound, type, kind,
5877 : 0, intent);
5878 677 : break;
5879 677 : case(4): /* VLIST */
5880 677 : type = BT_INTEGER;
5881 677 : kind = gfc_default_integer_kind;
5882 677 : intent = INTENT_IN;
5883 677 : check_dtio_arg_TKR_intent (fsym, typebound, type, kind,
5884 : 1, intent);
5885 677 : break;
5886 804 : case(5): /* IOSTAT */
5887 804 : type = BT_INTEGER;
5888 804 : kind = gfc_default_integer_kind;
5889 804 : intent = INTENT_OUT;
5890 804 : check_dtio_arg_TKR_intent (fsym, typebound, type, kind,
5891 : 0, intent);
5892 804 : break;
5893 804 : case(6): /* IOMSG */
5894 804 : type = BT_CHARACTER;
5895 804 : kind = gfc_default_character_kind;
5896 804 : intent = INTENT_INOUT;
5897 804 : check_dtio_arg_TKR_intent (fsym, typebound, type, kind,
5898 : 0, intent);
5899 804 : break;
5900 0 : default:
5901 0 : gcc_unreachable ();
5902 : }
5903 : }
5904 804 : derived->attr.has_dtio_procs = 1;
5905 804 : return;
5906 : }
5907 :
5908 : void
5909 94832 : gfc_check_dtio_interfaces (gfc_symbol *derived)
5910 : {
5911 94832 : gfc_symtree *tb_io_st;
5912 94832 : bool t = false;
5913 94832 : int code;
5914 94832 : bool formatted;
5915 :
5916 94832 : if (derived->attr.is_class == 1 || derived->attr.vtype == 1)
5917 37191 : return;
5918 :
5919 : /* Check typebound DTIO bindings. */
5920 288205 : for (code = 0; code < 4; code++)
5921 : {
5922 230564 : formatted = ((dtio_codes)code == DTIO_RF)
5923 : || ((dtio_codes)code == DTIO_WF);
5924 :
5925 230564 : tb_io_st = gfc_find_typebound_proc (derived, &t,
5926 : gfc_code2string (dtio_procs, code),
5927 : true, &derived->declared_at);
5928 230564 : if (tb_io_st != NULL)
5929 559 : check_dtio_interface1 (derived, tb_io_st, true, formatted, code);
5930 : }
5931 :
5932 : /* Check generic DTIO interfaces. */
5933 288205 : for (code = 0; code < 4; code++)
5934 : {
5935 230564 : formatted = ((dtio_codes)code == DTIO_RF)
5936 : || ((dtio_codes)code == DTIO_WF);
5937 :
5938 230564 : tb_io_st = gfc_find_symtree (derived->ns->sym_root,
5939 : gfc_code2string (dtio_procs, code));
5940 230564 : if (tb_io_st != NULL)
5941 330 : check_dtio_interface1 (derived, tb_io_st, false, formatted, code);
5942 : }
5943 : }
5944 :
5945 :
5946 : gfc_symtree*
5947 4367 : gfc_find_typebound_dtio_proc (gfc_symbol *derived, bool write, bool formatted)
5948 : {
5949 4367 : gfc_symtree *tb_io_st = NULL;
5950 4367 : bool t = false;
5951 :
5952 4367 : if (!derived || !derived->resolve_symbol_called
5953 4367 : || derived->attr.flavor != FL_DERIVED)
5954 : return NULL;
5955 :
5956 : /* Try to find a typebound DTIO binding. */
5957 4361 : if (formatted == true)
5958 : {
5959 4116 : if (write == true)
5960 1929 : tb_io_st = gfc_find_typebound_proc (derived, &t,
5961 : gfc_code2string (dtio_procs,
5962 : DTIO_WF),
5963 : true,
5964 : &derived->declared_at);
5965 : else
5966 2187 : tb_io_st = gfc_find_typebound_proc (derived, &t,
5967 : gfc_code2string (dtio_procs,
5968 : DTIO_RF),
5969 : true,
5970 : &derived->declared_at);
5971 : }
5972 : else
5973 : {
5974 245 : if (write == true)
5975 109 : tb_io_st = gfc_find_typebound_proc (derived, &t,
5976 : gfc_code2string (dtio_procs,
5977 : DTIO_WUF),
5978 : true,
5979 : &derived->declared_at);
5980 : else
5981 136 : tb_io_st = gfc_find_typebound_proc (derived, &t,
5982 : gfc_code2string (dtio_procs,
5983 : DTIO_RUF),
5984 : true,
5985 : &derived->declared_at);
5986 : }
5987 : return tb_io_st;
5988 : }
5989 :
5990 :
5991 : gfc_symbol *
5992 2919 : gfc_find_specific_dtio_proc (gfc_symbol *derived, bool write, bool formatted)
5993 : {
5994 2919 : gfc_symtree *tb_io_st = NULL;
5995 2919 : gfc_symbol *dtio_sub = NULL;
5996 2919 : gfc_symbol *extended;
5997 2919 : gfc_typebound_proc *tb_io_proc, *specific_proc;
5998 :
5999 2919 : tb_io_st = gfc_find_typebound_dtio_proc (derived, write, formatted);
6000 :
6001 2919 : if (tb_io_st != NULL)
6002 : {
6003 860 : const char *genname;
6004 860 : gfc_symtree *st;
6005 :
6006 860 : tb_io_proc = tb_io_st->n.tb;
6007 860 : gcc_assert (tb_io_proc != NULL);
6008 860 : gcc_assert (tb_io_proc->is_generic);
6009 860 : gcc_assert (tb_io_proc->u.generic->next == NULL);
6010 :
6011 860 : specific_proc = tb_io_proc->u.generic->specific;
6012 860 : gcc_assert (!specific_proc->is_generic);
6013 :
6014 : /* Go back and make sure that we have the right specific procedure.
6015 : Here we most likely have a procedure from the parent type, which
6016 : can be overridden in extensions. */
6017 860 : genname = tb_io_proc->u.generic->specific_st->name;
6018 860 : st = gfc_find_typebound_proc (derived, NULL, genname,
6019 : true, &tb_io_proc->where);
6020 860 : if (st)
6021 860 : dtio_sub = st->n.tb->u.specific->n.sym;
6022 : else
6023 0 : dtio_sub = specific_proc->u.specific->n.sym;
6024 :
6025 860 : goto finish;
6026 : }
6027 :
6028 : /* If there is not a typebound binding, look for a generic
6029 : DTIO interface. */
6030 4197 : for (extended = derived; extended;
6031 2138 : extended = gfc_get_derived_super_type (extended))
6032 : {
6033 2138 : if (extended == NULL || extended->ns == NULL
6034 2138 : || extended->attr.flavor == FL_UNKNOWN)
6035 : return NULL;
6036 :
6037 2138 : if (formatted == true)
6038 : {
6039 2051 : if (write == true)
6040 928 : tb_io_st = gfc_find_symtree (extended->ns->sym_root,
6041 : gfc_code2string (dtio_procs,
6042 : DTIO_WF));
6043 : else
6044 1123 : tb_io_st = gfc_find_symtree (extended->ns->sym_root,
6045 : gfc_code2string (dtio_procs,
6046 : DTIO_RF));
6047 : }
6048 : else
6049 : {
6050 87 : if (write == true)
6051 37 : tb_io_st = gfc_find_symtree (extended->ns->sym_root,
6052 : gfc_code2string (dtio_procs,
6053 : DTIO_WUF));
6054 : else
6055 50 : tb_io_st = gfc_find_symtree (extended->ns->sym_root,
6056 : gfc_code2string (dtio_procs,
6057 : DTIO_RUF));
6058 : }
6059 :
6060 2138 : if (tb_io_st != NULL
6061 269 : && tb_io_st->n.sym
6062 269 : && tb_io_st->n.sym->generic)
6063 : {
6064 26 : for (gfc_interface *intr = tb_io_st->n.sym->generic;
6065 295 : intr && intr->sym; intr = intr->next)
6066 : {
6067 273 : if (intr->sym->formal)
6068 : {
6069 268 : gfc_symbol *fsym = intr->sym->formal->sym;
6070 268 : if ((fsym->ts.type == BT_CLASS
6071 218 : && CLASS_DATA (fsym)->ts.u.derived == extended)
6072 71 : || (fsym->ts.type == BT_DERIVED
6073 50 : && fsym->ts.u.derived == extended))
6074 : {
6075 : dtio_sub = intr->sym;
6076 : break;
6077 : }
6078 : }
6079 : }
6080 : }
6081 : }
6082 :
6083 2059 : finish:
6084 2919 : if (dtio_sub
6085 1107 : && dtio_sub->formal->sym->ts.type == BT_CLASS
6086 1057 : && derived != CLASS_DATA (dtio_sub->formal->sym)->ts.u.derived)
6087 97 : gfc_find_derived_vtab (derived);
6088 :
6089 : return dtio_sub;
6090 : }
6091 :
6092 : /* Helper function - if we do not find an interface for a procedure,
6093 : construct it from the actual arglist. Luckily, this can only
6094 : happen for call by reference, so the information we actually need
6095 : to provide (and which would be impossible to guess from the call
6096 : itself) is not actually needed. */
6097 :
6098 : void
6099 1993 : gfc_get_formal_from_actual_arglist (gfc_symbol *sym,
6100 : gfc_actual_arglist *actual_args)
6101 : {
6102 1993 : gfc_actual_arglist *a;
6103 1993 : gfc_formal_arglist **f;
6104 1993 : gfc_symbol *s;
6105 1993 : char name[GFC_MAX_SYMBOL_LEN + 1];
6106 1993 : static int var_num;
6107 :
6108 : /* Do not infer the formal from actual arguments if we are dealing with
6109 : classes. */
6110 :
6111 1993 : if (sym->ts.type == BT_CLASS)
6112 1 : return;
6113 :
6114 1992 : f = &sym->formal;
6115 5974 : for (a = actual_args; a != NULL; a = a->next)
6116 : {
6117 3982 : (*f) = gfc_get_formal_arglist ();
6118 3982 : if (a->expr)
6119 : {
6120 3974 : snprintf (name, GFC_MAX_SYMBOL_LEN, "_formal_%d", var_num ++);
6121 3974 : gfc_get_symbol (name, gfc_current_ns, &s);
6122 3974 : if (a->expr->ts.type == BT_PROCEDURE)
6123 : {
6124 44 : gfc_symbol *asym = a->expr->symtree->n.sym;
6125 44 : s->attr.flavor = FL_PROCEDURE;
6126 44 : if (asym->attr.function)
6127 : {
6128 24 : s->attr.function = 1;
6129 24 : s->ts = asym->ts;
6130 : }
6131 44 : s->attr.subroutine = asym->attr.subroutine;
6132 : }
6133 : else
6134 : {
6135 3930 : s->ts = a->expr->ts;
6136 :
6137 3930 : if (s->ts.type == BT_CHARACTER)
6138 180 : s->ts.u.cl = gfc_get_charlen ();
6139 :
6140 3930 : s->ts.deferred = 0;
6141 3930 : s->ts.is_iso_c = 0;
6142 3930 : s->ts.is_c_interop = 0;
6143 3930 : s->attr.flavor = FL_VARIABLE;
6144 3930 : if (a->expr->rank > 0)
6145 : {
6146 872 : s->attr.dimension = 1;
6147 872 : s->as = gfc_get_array_spec ();
6148 872 : s->as->rank = 1;
6149 1744 : s->as->lower[0] = gfc_get_int_expr (gfc_index_integer_kind,
6150 872 : &a->expr->where, 1);
6151 872 : s->as->upper[0] = NULL;
6152 872 : s->as->type = AS_ASSUMED_SIZE;
6153 : }
6154 : else
6155 3058 : s->maybe_array = maybe_dummy_array_arg (a->expr);
6156 : }
6157 3974 : s->attr.dummy = 1;
6158 3974 : s->attr.artificial = 1;
6159 3974 : s->declared_at = a->expr->where;
6160 3974 : s->attr.intent = INTENT_UNKNOWN;
6161 3974 : (*f)->sym = s;
6162 3974 : gfc_commit_symbol (s);
6163 : }
6164 : else /* If a->expr is NULL, this is an alternate rerturn. */
6165 8 : (*f)->sym = NULL;
6166 :
6167 3982 : f = &((*f)->next);
6168 : }
6169 :
6170 : }
6171 :
6172 :
6173 : const char *
6174 241 : gfc_dummy_arg_get_name (gfc_dummy_arg & dummy_arg)
6175 : {
6176 241 : switch (dummy_arg.intrinsicness)
6177 : {
6178 241 : case GFC_INTRINSIC_DUMMY_ARG:
6179 241 : return dummy_arg.u.intrinsic->name;
6180 :
6181 0 : case GFC_NON_INTRINSIC_DUMMY_ARG:
6182 0 : return dummy_arg.u.non_intrinsic->sym->name;
6183 :
6184 0 : default:
6185 0 : gcc_unreachable ();
6186 : }
6187 : }
6188 :
6189 :
6190 : const gfc_typespec &
6191 2460 : gfc_dummy_arg_get_typespec (gfc_dummy_arg & dummy_arg)
6192 : {
6193 2460 : switch (dummy_arg.intrinsicness)
6194 : {
6195 1352 : case GFC_INTRINSIC_DUMMY_ARG:
6196 1352 : return dummy_arg.u.intrinsic->ts;
6197 :
6198 1108 : case GFC_NON_INTRINSIC_DUMMY_ARG:
6199 1108 : return dummy_arg.u.non_intrinsic->sym->ts;
6200 :
6201 0 : default:
6202 0 : gcc_unreachable ();
6203 : }
6204 : }
6205 :
6206 :
6207 : bool
6208 26426 : gfc_dummy_arg_is_optional (gfc_dummy_arg & dummy_arg)
6209 : {
6210 26426 : switch (dummy_arg.intrinsicness)
6211 : {
6212 12434 : case GFC_INTRINSIC_DUMMY_ARG:
6213 12434 : return dummy_arg.u.intrinsic->optional;
6214 :
6215 13992 : case GFC_NON_INTRINSIC_DUMMY_ARG:
6216 13992 : return dummy_arg.u.non_intrinsic->sym->attr.optional;
6217 :
6218 0 : default:
6219 0 : gcc_unreachable ();
6220 : }
6221 : }
|
