1 /* OpenMP directive matching and resolving.
2 Copyright (C) 2005, 2006, 2007, 2008, 2010
3 Free Software Foundation, Inc.
4 Contributed by Jakub Jelinek
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
28 #include "pointer-set.h"
32 /* Match an end of OpenMP directive. End of OpenMP directive is optional
33 whitespace, followed by '\n' or comment '!'. */
36 gfc_match_omp_eos (void)
41 old_loc = gfc_current_locus;
42 gfc_gobble_whitespace ();
44 c = gfc_next_ascii_char ();
49 c = gfc_next_ascii_char ();
57 gfc_current_locus = old_loc;
61 /* Free an omp_clauses structure. */
64 gfc_free_omp_clauses (gfc_omp_clauses *c)
70 gfc_free_expr (c->if_expr);
71 gfc_free_expr (c->num_threads);
72 gfc_free_expr (c->chunk_size);
73 for (i = 0; i < OMP_LIST_NUM; i++)
74 gfc_free_namelist (c->lists[i]);
78 /* Match a variable/common block list and construct a namelist from it. */
81 gfc_match_omp_variable_list (const char *str, gfc_namelist **list,
84 gfc_namelist *head, *tail, *p;
86 char n[GFC_MAX_SYMBOL_LEN+1];
93 old_loc = gfc_current_locus;
101 m = gfc_match_symbol (&sym, 1);
105 gfc_set_sym_referenced (sym);
106 p = gfc_get_namelist ();
125 m = gfc_match (" / %n /", n);
126 if (m == MATCH_ERROR)
131 st = gfc_find_symtree (gfc_current_ns->common_root, n);
134 gfc_error ("COMMON block /%s/ not found at %C", n);
137 for (sym = st->n.common->head; sym; sym = sym->common_next)
139 gfc_set_sym_referenced (sym);
140 p = gfc_get_namelist ();
152 if (gfc_match_char (')') == MATCH_YES)
154 if (gfc_match_char (',') != MATCH_YES)
159 list = &(*list)->next;
165 gfc_error ("Syntax error in OpenMP variable list at %C");
168 gfc_free_namelist (head);
169 gfc_current_locus = old_loc;
173 #define OMP_CLAUSE_PRIVATE (1 << 0)
174 #define OMP_CLAUSE_FIRSTPRIVATE (1 << 1)
175 #define OMP_CLAUSE_LASTPRIVATE (1 << 2)
176 #define OMP_CLAUSE_COPYPRIVATE (1 << 3)
177 #define OMP_CLAUSE_SHARED (1 << 4)
178 #define OMP_CLAUSE_COPYIN (1 << 5)
179 #define OMP_CLAUSE_REDUCTION (1 << 6)
180 #define OMP_CLAUSE_IF (1 << 7)
181 #define OMP_CLAUSE_NUM_THREADS (1 << 8)
182 #define OMP_CLAUSE_SCHEDULE (1 << 9)
183 #define OMP_CLAUSE_DEFAULT (1 << 10)
184 #define OMP_CLAUSE_ORDERED (1 << 11)
185 #define OMP_CLAUSE_COLLAPSE (1 << 12)
186 #define OMP_CLAUSE_UNTIED (1 << 13)
188 /* Match OpenMP directive clauses. MASK is a bitmask of
189 clauses that are allowed for a particular directive. */
192 gfc_match_omp_clauses (gfc_omp_clauses **cp, int mask)
194 gfc_omp_clauses *c = gfc_get_omp_clauses ();
196 bool needs_space = true, first = true;
201 if ((first || gfc_match_char (',') != MATCH_YES)
202 && (needs_space && gfc_match_space () != MATCH_YES))
206 gfc_gobble_whitespace ();
207 if ((mask & OMP_CLAUSE_IF) && c->if_expr == NULL
208 && gfc_match ("if ( %e )", &c->if_expr) == MATCH_YES)
210 if ((mask & OMP_CLAUSE_NUM_THREADS) && c->num_threads == NULL
211 && gfc_match ("num_threads ( %e )", &c->num_threads) == MATCH_YES)
213 if ((mask & OMP_CLAUSE_PRIVATE)
214 && gfc_match_omp_variable_list ("private (",
215 &c->lists[OMP_LIST_PRIVATE], true)
218 if ((mask & OMP_CLAUSE_FIRSTPRIVATE)
219 && gfc_match_omp_variable_list ("firstprivate (",
220 &c->lists[OMP_LIST_FIRSTPRIVATE],
224 if ((mask & OMP_CLAUSE_LASTPRIVATE)
225 && gfc_match_omp_variable_list ("lastprivate (",
226 &c->lists[OMP_LIST_LASTPRIVATE],
230 if ((mask & OMP_CLAUSE_COPYPRIVATE)
231 && gfc_match_omp_variable_list ("copyprivate (",
232 &c->lists[OMP_LIST_COPYPRIVATE],
236 if ((mask & OMP_CLAUSE_SHARED)
237 && gfc_match_omp_variable_list ("shared (",
238 &c->lists[OMP_LIST_SHARED], true)
241 if ((mask & OMP_CLAUSE_COPYIN)
242 && gfc_match_omp_variable_list ("copyin (",
243 &c->lists[OMP_LIST_COPYIN], true)
246 old_loc = gfc_current_locus;
247 if ((mask & OMP_CLAUSE_REDUCTION)
248 && gfc_match ("reduction ( ") == MATCH_YES)
250 int reduction = OMP_LIST_NUM;
251 char buffer[GFC_MAX_SYMBOL_LEN + 1];
252 if (gfc_match_char ('+') == MATCH_YES)
253 reduction = OMP_LIST_PLUS;
254 else if (gfc_match_char ('*') == MATCH_YES)
255 reduction = OMP_LIST_MULT;
256 else if (gfc_match_char ('-') == MATCH_YES)
257 reduction = OMP_LIST_SUB;
258 else if (gfc_match (".and.") == MATCH_YES)
259 reduction = OMP_LIST_AND;
260 else if (gfc_match (".or.") == MATCH_YES)
261 reduction = OMP_LIST_OR;
262 else if (gfc_match (".eqv.") == MATCH_YES)
263 reduction = OMP_LIST_EQV;
264 else if (gfc_match (".neqv.") == MATCH_YES)
265 reduction = OMP_LIST_NEQV;
266 else if (gfc_match_name (buffer) == MATCH_YES)
269 const char *n = buffer;
271 gfc_find_symbol (buffer, NULL, 1, &sym);
274 if (sym->attr.intrinsic)
276 else if ((sym->attr.flavor != FL_UNKNOWN
277 && sym->attr.flavor != FL_PROCEDURE)
278 || sym->attr.external
283 || sym->attr.subroutine
286 || sym->attr.cray_pointer
287 || sym->attr.cray_pointee
288 || (sym->attr.proc != PROC_UNKNOWN
289 && sym->attr.proc != PROC_INTRINSIC)
290 || sym->attr.if_source != IFSRC_UNKNOWN
291 || sym == sym->ns->proc_name)
293 gfc_error_now ("%s is not INTRINSIC procedure name "
300 if (strcmp (n, "max") == 0)
301 reduction = OMP_LIST_MAX;
302 else if (strcmp (n, "min") == 0)
303 reduction = OMP_LIST_MIN;
304 else if (strcmp (n, "iand") == 0)
305 reduction = OMP_LIST_IAND;
306 else if (strcmp (n, "ior") == 0)
307 reduction = OMP_LIST_IOR;
308 else if (strcmp (n, "ieor") == 0)
309 reduction = OMP_LIST_IEOR;
310 if (reduction != OMP_LIST_NUM
312 && ! sym->attr.intrinsic
313 && ! sym->attr.use_assoc
314 && ((sym->attr.flavor == FL_UNKNOWN
315 && gfc_add_flavor (&sym->attr, FL_PROCEDURE,
316 sym->name, NULL) == FAILURE)
317 || gfc_add_intrinsic (&sym->attr, NULL) == FAILURE))
319 gfc_free_omp_clauses (c);
323 if (reduction != OMP_LIST_NUM
324 && gfc_match_omp_variable_list (" :", &c->lists[reduction],
329 gfc_current_locus = old_loc;
331 if ((mask & OMP_CLAUSE_DEFAULT)
332 && c->default_sharing == OMP_DEFAULT_UNKNOWN)
334 if (gfc_match ("default ( shared )") == MATCH_YES)
335 c->default_sharing = OMP_DEFAULT_SHARED;
336 else if (gfc_match ("default ( private )") == MATCH_YES)
337 c->default_sharing = OMP_DEFAULT_PRIVATE;
338 else if (gfc_match ("default ( none )") == MATCH_YES)
339 c->default_sharing = OMP_DEFAULT_NONE;
340 else if (gfc_match ("default ( firstprivate )") == MATCH_YES)
341 c->default_sharing = OMP_DEFAULT_FIRSTPRIVATE;
342 if (c->default_sharing != OMP_DEFAULT_UNKNOWN)
345 old_loc = gfc_current_locus;
346 if ((mask & OMP_CLAUSE_SCHEDULE)
347 && c->sched_kind == OMP_SCHED_NONE
348 && gfc_match ("schedule ( ") == MATCH_YES)
350 if (gfc_match ("static") == MATCH_YES)
351 c->sched_kind = OMP_SCHED_STATIC;
352 else if (gfc_match ("dynamic") == MATCH_YES)
353 c->sched_kind = OMP_SCHED_DYNAMIC;
354 else if (gfc_match ("guided") == MATCH_YES)
355 c->sched_kind = OMP_SCHED_GUIDED;
356 else if (gfc_match ("runtime") == MATCH_YES)
357 c->sched_kind = OMP_SCHED_RUNTIME;
358 else if (gfc_match ("auto") == MATCH_YES)
359 c->sched_kind = OMP_SCHED_AUTO;
360 if (c->sched_kind != OMP_SCHED_NONE)
363 if (c->sched_kind != OMP_SCHED_RUNTIME
364 && c->sched_kind != OMP_SCHED_AUTO)
365 m = gfc_match (" , %e )", &c->chunk_size);
367 m = gfc_match_char (')');
369 c->sched_kind = OMP_SCHED_NONE;
371 if (c->sched_kind != OMP_SCHED_NONE)
374 gfc_current_locus = old_loc;
376 if ((mask & OMP_CLAUSE_ORDERED) && !c->ordered
377 && gfc_match ("ordered") == MATCH_YES)
379 c->ordered = needs_space = true;
382 if ((mask & OMP_CLAUSE_UNTIED) && !c->untied
383 && gfc_match ("untied") == MATCH_YES)
385 c->untied = needs_space = true;
388 if ((mask & OMP_CLAUSE_COLLAPSE) && !c->collapse)
390 gfc_expr *cexpr = NULL;
391 match m = gfc_match ("collapse ( %e )", &cexpr);
396 const char *p = gfc_extract_int (cexpr, &collapse);
402 else if (collapse <= 0)
404 gfc_error_now ("COLLAPSE clause argument not"
405 " constant positive integer at %C");
408 c->collapse = collapse;
409 gfc_free_expr (cexpr);
417 if (gfc_match_omp_eos () != MATCH_YES)
419 gfc_free_omp_clauses (c);
427 #define OMP_PARALLEL_CLAUSES \
428 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE | OMP_CLAUSE_SHARED \
429 | OMP_CLAUSE_COPYIN | OMP_CLAUSE_REDUCTION | OMP_CLAUSE_IF \
430 | OMP_CLAUSE_NUM_THREADS | OMP_CLAUSE_DEFAULT)
431 #define OMP_DO_CLAUSES \
432 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE \
433 | OMP_CLAUSE_LASTPRIVATE | OMP_CLAUSE_REDUCTION \
434 | OMP_CLAUSE_SCHEDULE | OMP_CLAUSE_ORDERED | OMP_CLAUSE_COLLAPSE)
435 #define OMP_SECTIONS_CLAUSES \
436 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE \
437 | OMP_CLAUSE_LASTPRIVATE | OMP_CLAUSE_REDUCTION)
438 #define OMP_TASK_CLAUSES \
439 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE | OMP_CLAUSE_SHARED \
440 | OMP_CLAUSE_IF | OMP_CLAUSE_DEFAULT | OMP_CLAUSE_UNTIED)
443 gfc_match_omp_parallel (void)
446 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES) != MATCH_YES)
448 new_st.op = EXEC_OMP_PARALLEL;
449 new_st.ext.omp_clauses = c;
455 gfc_match_omp_task (void)
458 if (gfc_match_omp_clauses (&c, OMP_TASK_CLAUSES) != MATCH_YES)
460 new_st.op = EXEC_OMP_TASK;
461 new_st.ext.omp_clauses = c;
467 gfc_match_omp_taskwait (void)
469 if (gfc_match_omp_eos () != MATCH_YES)
471 new_st.op = EXEC_OMP_TASKWAIT;
472 new_st.ext.omp_clauses = NULL;
478 gfc_match_omp_critical (void)
480 char n[GFC_MAX_SYMBOL_LEN+1];
482 if (gfc_match (" ( %n )", n) != MATCH_YES)
484 if (gfc_match_omp_eos () != MATCH_YES)
486 new_st.op = EXEC_OMP_CRITICAL;
487 new_st.ext.omp_name = n[0] ? xstrdup (n) : NULL;
493 gfc_match_omp_do (void)
496 if (gfc_match_omp_clauses (&c, OMP_DO_CLAUSES) != MATCH_YES)
498 new_st.op = EXEC_OMP_DO;
499 new_st.ext.omp_clauses = c;
505 gfc_match_omp_flush (void)
507 gfc_namelist *list = NULL;
508 gfc_match_omp_variable_list (" (", &list, true);
509 if (gfc_match_omp_eos () != MATCH_YES)
511 gfc_free_namelist (list);
514 new_st.op = EXEC_OMP_FLUSH;
515 new_st.ext.omp_namelist = list;
521 gfc_match_omp_threadprivate (void)
524 char n[GFC_MAX_SYMBOL_LEN+1];
529 old_loc = gfc_current_locus;
531 m = gfc_match (" (");
537 m = gfc_match_symbol (&sym, 0);
541 if (sym->attr.in_common)
542 gfc_error_now ("Threadprivate variable at %C is an element of "
544 else if (gfc_add_threadprivate (&sym->attr, sym->name,
545 &sym->declared_at) == FAILURE)
554 m = gfc_match (" / %n /", n);
555 if (m == MATCH_ERROR)
557 if (m == MATCH_NO || n[0] == '\0')
560 st = gfc_find_symtree (gfc_current_ns->common_root, n);
563 gfc_error ("COMMON block /%s/ not found at %C", n);
566 st->n.common->threadprivate = 1;
567 for (sym = st->n.common->head; sym; sym = sym->common_next)
568 if (gfc_add_threadprivate (&sym->attr, sym->name,
569 &sym->declared_at) == FAILURE)
573 if (gfc_match_char (')') == MATCH_YES)
575 if (gfc_match_char (',') != MATCH_YES)
582 gfc_error ("Syntax error in !$OMP THREADPRIVATE list at %C");
585 gfc_current_locus = old_loc;
591 gfc_match_omp_parallel_do (void)
594 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES | OMP_DO_CLAUSES)
597 new_st.op = EXEC_OMP_PARALLEL_DO;
598 new_st.ext.omp_clauses = c;
604 gfc_match_omp_parallel_sections (void)
607 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES | OMP_SECTIONS_CLAUSES)
610 new_st.op = EXEC_OMP_PARALLEL_SECTIONS;
611 new_st.ext.omp_clauses = c;
617 gfc_match_omp_parallel_workshare (void)
620 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES) != MATCH_YES)
622 new_st.op = EXEC_OMP_PARALLEL_WORKSHARE;
623 new_st.ext.omp_clauses = c;
629 gfc_match_omp_sections (void)
632 if (gfc_match_omp_clauses (&c, OMP_SECTIONS_CLAUSES) != MATCH_YES)
634 new_st.op = EXEC_OMP_SECTIONS;
635 new_st.ext.omp_clauses = c;
641 gfc_match_omp_single (void)
644 if (gfc_match_omp_clauses (&c, OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE)
647 new_st.op = EXEC_OMP_SINGLE;
648 new_st.ext.omp_clauses = c;
654 gfc_match_omp_workshare (void)
656 if (gfc_match_omp_eos () != MATCH_YES)
658 new_st.op = EXEC_OMP_WORKSHARE;
659 new_st.ext.omp_clauses = gfc_get_omp_clauses ();
665 gfc_match_omp_master (void)
667 if (gfc_match_omp_eos () != MATCH_YES)
669 new_st.op = EXEC_OMP_MASTER;
670 new_st.ext.omp_clauses = NULL;
676 gfc_match_omp_ordered (void)
678 if (gfc_match_omp_eos () != MATCH_YES)
680 new_st.op = EXEC_OMP_ORDERED;
681 new_st.ext.omp_clauses = NULL;
687 gfc_match_omp_atomic (void)
689 if (gfc_match_omp_eos () != MATCH_YES)
691 new_st.op = EXEC_OMP_ATOMIC;
692 new_st.ext.omp_clauses = NULL;
698 gfc_match_omp_barrier (void)
700 if (gfc_match_omp_eos () != MATCH_YES)
702 new_st.op = EXEC_OMP_BARRIER;
703 new_st.ext.omp_clauses = NULL;
709 gfc_match_omp_end_nowait (void)
712 if (gfc_match ("% nowait") == MATCH_YES)
714 if (gfc_match_omp_eos () != MATCH_YES)
716 new_st.op = EXEC_OMP_END_NOWAIT;
717 new_st.ext.omp_bool = nowait;
723 gfc_match_omp_end_single (void)
726 if (gfc_match ("% nowait") == MATCH_YES)
728 new_st.op = EXEC_OMP_END_NOWAIT;
729 new_st.ext.omp_bool = true;
732 if (gfc_match_omp_clauses (&c, OMP_CLAUSE_COPYPRIVATE) != MATCH_YES)
734 new_st.op = EXEC_OMP_END_SINGLE;
735 new_st.ext.omp_clauses = c;
740 /* OpenMP directive resolving routines. */
743 resolve_omp_clauses (gfc_code *code)
745 gfc_omp_clauses *omp_clauses = code->ext.omp_clauses;
748 static const char *clause_names[]
749 = { "PRIVATE", "FIRSTPRIVATE", "LASTPRIVATE", "COPYPRIVATE", "SHARED",
750 "COPYIN", "REDUCTION" };
752 if (omp_clauses == NULL)
755 if (omp_clauses->if_expr)
757 gfc_expr *expr = omp_clauses->if_expr;
758 if (gfc_resolve_expr (expr) == FAILURE
759 || expr->ts.type != BT_LOGICAL || expr->rank != 0)
760 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
763 if (omp_clauses->num_threads)
765 gfc_expr *expr = omp_clauses->num_threads;
766 if (gfc_resolve_expr (expr) == FAILURE
767 || expr->ts.type != BT_INTEGER || expr->rank != 0)
768 gfc_error ("NUM_THREADS clause at %L requires a scalar "
769 "INTEGER expression", &expr->where);
771 if (omp_clauses->chunk_size)
773 gfc_expr *expr = omp_clauses->chunk_size;
774 if (gfc_resolve_expr (expr) == FAILURE
775 || expr->ts.type != BT_INTEGER || expr->rank != 0)
776 gfc_error ("SCHEDULE clause's chunk_size at %L requires "
777 "a scalar INTEGER expression", &expr->where);
780 /* Check that no symbol appears on multiple clauses, except that
781 a symbol can appear on both firstprivate and lastprivate. */
782 for (list = 0; list < OMP_LIST_NUM; list++)
783 for (n = omp_clauses->lists[list]; n; n = n->next)
786 if (n->sym->attr.flavor == FL_VARIABLE)
788 if (n->sym->attr.flavor == FL_PROCEDURE
789 && n->sym->result == n->sym
790 && n->sym->attr.function)
792 if (gfc_current_ns->proc_name == n->sym
793 || (gfc_current_ns->parent
794 && gfc_current_ns->parent->proc_name == n->sym))
796 if (gfc_current_ns->proc_name->attr.entry_master)
798 gfc_entry_list *el = gfc_current_ns->entries;
799 for (; el; el = el->next)
800 if (el->sym == n->sym)
805 if (gfc_current_ns->parent
806 && gfc_current_ns->parent->proc_name->attr.entry_master)
808 gfc_entry_list *el = gfc_current_ns->parent->entries;
809 for (; el; el = el->next)
810 if (el->sym == n->sym)
816 gfc_error ("Object '%s' is not a variable at %L", n->sym->name,
820 for (list = 0; list < OMP_LIST_NUM; list++)
821 if (list != OMP_LIST_FIRSTPRIVATE && list != OMP_LIST_LASTPRIVATE)
822 for (n = omp_clauses->lists[list]; n; n = n->next)
824 gfc_error ("Symbol '%s' present on multiple clauses at %L",
825 n->sym->name, &code->loc);
829 gcc_assert (OMP_LIST_LASTPRIVATE == OMP_LIST_FIRSTPRIVATE + 1);
830 for (list = OMP_LIST_FIRSTPRIVATE; list <= OMP_LIST_LASTPRIVATE; list++)
831 for (n = omp_clauses->lists[list]; n; n = n->next)
834 gfc_error ("Symbol '%s' present on multiple clauses at %L",
835 n->sym->name, &code->loc);
839 for (n = omp_clauses->lists[OMP_LIST_FIRSTPRIVATE]; n; n = n->next)
841 gfc_error ("Symbol '%s' present on multiple clauses at %L",
842 n->sym->name, &code->loc);
846 for (n = omp_clauses->lists[OMP_LIST_LASTPRIVATE]; n; n = n->next)
849 for (n = omp_clauses->lists[OMP_LIST_LASTPRIVATE]; n; n = n->next)
851 gfc_error ("Symbol '%s' present on multiple clauses at %L",
852 n->sym->name, &code->loc);
856 for (list = 0; list < OMP_LIST_NUM; list++)
857 if ((n = omp_clauses->lists[list]) != NULL)
861 if (list < OMP_LIST_REDUCTION_FIRST)
862 name = clause_names[list];
863 else if (list <= OMP_LIST_REDUCTION_LAST)
864 name = clause_names[OMP_LIST_REDUCTION_FIRST];
870 case OMP_LIST_COPYIN:
871 for (; n != NULL; n = n->next)
873 if (!n->sym->attr.threadprivate)
874 gfc_error ("Non-THREADPRIVATE object '%s' in COPYIN clause"
875 " at %L", n->sym->name, &code->loc);
876 if (n->sym->ts.type == BT_DERIVED && n->sym->ts.u.derived->attr.alloc_comp)
877 gfc_error ("COPYIN clause object '%s' at %L has ALLOCATABLE components",
878 n->sym->name, &code->loc);
881 case OMP_LIST_COPYPRIVATE:
882 for (; n != NULL; n = n->next)
884 if (n->sym->as && n->sym->as->type == AS_ASSUMED_SIZE)
885 gfc_error ("Assumed size array '%s' in COPYPRIVATE clause "
886 "at %L", n->sym->name, &code->loc);
887 if (n->sym->ts.type == BT_DERIVED && n->sym->ts.u.derived->attr.alloc_comp)
888 gfc_error ("COPYPRIVATE clause object '%s' at %L has ALLOCATABLE components",
889 n->sym->name, &code->loc);
892 case OMP_LIST_SHARED:
893 for (; n != NULL; n = n->next)
895 if (n->sym->attr.threadprivate)
896 gfc_error ("THREADPRIVATE object '%s' in SHARED clause at "
897 "%L", n->sym->name, &code->loc);
898 if (n->sym->attr.cray_pointee)
899 gfc_error ("Cray pointee '%s' in SHARED clause at %L",
900 n->sym->name, &code->loc);
904 for (; n != NULL; n = n->next)
906 if (n->sym->attr.threadprivate)
907 gfc_error ("THREADPRIVATE object '%s' in %s clause at %L",
908 n->sym->name, name, &code->loc);
909 if (n->sym->attr.cray_pointee)
910 gfc_error ("Cray pointee '%s' in %s clause at %L",
911 n->sym->name, name, &code->loc);
912 if (list != OMP_LIST_PRIVATE)
914 if (n->sym->attr.pointer)
915 gfc_error ("POINTER object '%s' in %s clause at %L",
916 n->sym->name, name, &code->loc);
917 /* Variables in REDUCTION-clauses must be of intrinsic type (flagged below). */
918 if ((list < OMP_LIST_REDUCTION_FIRST || list > OMP_LIST_REDUCTION_LAST) &&
919 n->sym->ts.type == BT_DERIVED && n->sym->ts.u.derived->attr.alloc_comp)
920 gfc_error ("%s clause object '%s' has ALLOCATABLE components at %L",
921 name, n->sym->name, &code->loc);
922 if (n->sym->attr.cray_pointer)
923 gfc_error ("Cray pointer '%s' in %s clause at %L",
924 n->sym->name, name, &code->loc);
926 if (n->sym->as && n->sym->as->type == AS_ASSUMED_SIZE)
927 gfc_error ("Assumed size array '%s' in %s clause at %L",
928 n->sym->name, name, &code->loc);
929 if (n->sym->attr.in_namelist
930 && (list < OMP_LIST_REDUCTION_FIRST
931 || list > OMP_LIST_REDUCTION_LAST))
932 gfc_error ("Variable '%s' in %s clause is used in "
933 "NAMELIST statement at %L",
934 n->sym->name, name, &code->loc);
940 if (!gfc_numeric_ts (&n->sym->ts))
941 gfc_error ("%c REDUCTION variable '%s' at %L must be of numeric type, got %s",
942 list == OMP_LIST_PLUS ? '+'
943 : list == OMP_LIST_MULT ? '*' : '-',
944 n->sym->name, &code->loc,
945 gfc_typename (&n->sym->ts));
951 if (n->sym->ts.type != BT_LOGICAL)
952 gfc_error ("%s REDUCTION variable '%s' must be LOGICAL "
954 list == OMP_LIST_AND ? ".AND."
955 : list == OMP_LIST_OR ? ".OR."
956 : list == OMP_LIST_EQV ? ".EQV." : ".NEQV.",
957 n->sym->name, &code->loc);
961 if (n->sym->ts.type != BT_INTEGER
962 && n->sym->ts.type != BT_REAL)
963 gfc_error ("%s REDUCTION variable '%s' must be "
964 "INTEGER or REAL at %L",
965 list == OMP_LIST_MAX ? "MAX" : "MIN",
966 n->sym->name, &code->loc);
971 if (n->sym->ts.type != BT_INTEGER)
972 gfc_error ("%s REDUCTION variable '%s' must be INTEGER "
974 list == OMP_LIST_IAND ? "IAND"
975 : list == OMP_LIST_MULT ? "IOR" : "IEOR",
976 n->sym->name, &code->loc);
978 /* Workaround for PR middle-end/26316, nothing really needs
979 to be done here for OMP_LIST_PRIVATE. */
980 case OMP_LIST_PRIVATE:
981 gcc_assert (code->op != EXEC_NOP);
992 /* Return true if SYM is ever referenced in EXPR except in the SE node. */
995 expr_references_sym (gfc_expr *e, gfc_symbol *s, gfc_expr *se)
997 gfc_actual_arglist *arg;
998 if (e == NULL || e == se)
1000 switch (e->expr_type)
1005 case EXPR_STRUCTURE:
1007 if (e->symtree != NULL
1008 && e->symtree->n.sym == s)
1011 case EXPR_SUBSTRING:
1013 && (expr_references_sym (e->ref->u.ss.start, s, se)
1014 || expr_references_sym (e->ref->u.ss.end, s, se)))
1018 if (expr_references_sym (e->value.op.op2, s, se))
1020 return expr_references_sym (e->value.op.op1, s, se);
1022 for (arg = e->value.function.actual; arg; arg = arg->next)
1023 if (expr_references_sym (arg->expr, s, se))
1032 /* If EXPR is a conversion function that widens the type
1033 if WIDENING is true or narrows the type if WIDENING is false,
1034 return the inner expression, otherwise return NULL. */
1037 is_conversion (gfc_expr *expr, bool widening)
1039 gfc_typespec *ts1, *ts2;
1041 if (expr->expr_type != EXPR_FUNCTION
1042 || expr->value.function.isym == NULL
1043 || expr->value.function.esym != NULL
1044 || expr->value.function.isym->id != GFC_ISYM_CONVERSION)
1050 ts2 = &expr->value.function.actual->expr->ts;
1054 ts1 = &expr->value.function.actual->expr->ts;
1058 if (ts1->type > ts2->type
1059 || (ts1->type == ts2->type && ts1->kind > ts2->kind))
1060 return expr->value.function.actual->expr;
1067 resolve_omp_atomic (gfc_code *code)
1072 code = code->block->next;
1073 gcc_assert (code->op == EXEC_ASSIGN);
1074 gcc_assert (code->next == NULL);
1076 if (code->expr1->expr_type != EXPR_VARIABLE
1077 || code->expr1->symtree == NULL
1078 || code->expr1->rank != 0
1079 || (code->expr1->ts.type != BT_INTEGER
1080 && code->expr1->ts.type != BT_REAL
1081 && code->expr1->ts.type != BT_COMPLEX
1082 && code->expr1->ts.type != BT_LOGICAL))
1084 gfc_error ("!$OMP ATOMIC statement must set a scalar variable of "
1085 "intrinsic type at %L", &code->loc);
1089 var = code->expr1->symtree->n.sym;
1090 expr2 = is_conversion (code->expr2, false);
1092 expr2 = code->expr2;
1094 if (expr2->expr_type == EXPR_OP)
1096 gfc_expr *v = NULL, *e, *c;
1097 gfc_intrinsic_op op = expr2->value.op.op;
1098 gfc_intrinsic_op alt_op = INTRINSIC_NONE;
1102 case INTRINSIC_PLUS:
1103 alt_op = INTRINSIC_MINUS;
1105 case INTRINSIC_TIMES:
1106 alt_op = INTRINSIC_DIVIDE;
1108 case INTRINSIC_MINUS:
1109 alt_op = INTRINSIC_PLUS;
1111 case INTRINSIC_DIVIDE:
1112 alt_op = INTRINSIC_TIMES;
1118 alt_op = INTRINSIC_NEQV;
1120 case INTRINSIC_NEQV:
1121 alt_op = INTRINSIC_EQV;
1124 gfc_error ("!$OMP ATOMIC assignment operator must be "
1125 "+, *, -, /, .AND., .OR., .EQV. or .NEQV. at %L",
1130 /* Check for var = var op expr resp. var = expr op var where
1131 expr doesn't reference var and var op expr is mathematically
1132 equivalent to var op (expr) resp. expr op var equivalent to
1133 (expr) op var. We rely here on the fact that the matcher
1134 for x op1 y op2 z where op1 and op2 have equal precedence
1135 returns (x op1 y) op2 z. */
1136 e = expr2->value.op.op2;
1137 if (e->expr_type == EXPR_VARIABLE
1138 && e->symtree != NULL
1139 && e->symtree->n.sym == var)
1141 else if ((c = is_conversion (e, true)) != NULL
1142 && c->expr_type == EXPR_VARIABLE
1143 && c->symtree != NULL
1144 && c->symtree->n.sym == var)
1148 gfc_expr **p = NULL, **q;
1149 for (q = &expr2->value.op.op1; (e = *q) != NULL; )
1150 if (e->expr_type == EXPR_VARIABLE
1151 && e->symtree != NULL
1152 && e->symtree->n.sym == var)
1157 else if ((c = is_conversion (e, true)) != NULL)
1158 q = &e->value.function.actual->expr;
1159 else if (e->expr_type != EXPR_OP
1160 || (e->value.op.op != op
1161 && e->value.op.op != alt_op)
1167 q = &e->value.op.op1;
1172 gfc_error ("!$OMP ATOMIC assignment must be var = var op expr "
1173 "or var = expr op var at %L", &expr2->where);
1180 switch (e->value.op.op)
1182 case INTRINSIC_MINUS:
1183 case INTRINSIC_DIVIDE:
1185 case INTRINSIC_NEQV:
1186 gfc_error ("!$OMP ATOMIC var = var op expr not "
1187 "mathematically equivalent to var = var op "
1188 "(expr) at %L", &expr2->where);
1194 /* Canonicalize into var = var op (expr). */
1195 *p = e->value.op.op2;
1196 e->value.op.op2 = expr2;
1198 if (code->expr2 == expr2)
1199 code->expr2 = expr2 = e;
1201 code->expr2->value.function.actual->expr = expr2 = e;
1203 if (!gfc_compare_types (&expr2->value.op.op1->ts, &expr2->ts))
1205 for (p = &expr2->value.op.op1; *p != v;
1206 p = &(*p)->value.function.actual->expr)
1209 gfc_free_expr (expr2->value.op.op1);
1210 expr2->value.op.op1 = v;
1211 gfc_convert_type (v, &expr2->ts, 2);
1216 if (e->rank != 0 || expr_references_sym (code->expr2, var, v))
1218 gfc_error ("expr in !$OMP ATOMIC assignment var = var op expr "
1219 "must be scalar and cannot reference var at %L",
1224 else if (expr2->expr_type == EXPR_FUNCTION
1225 && expr2->value.function.isym != NULL
1226 && expr2->value.function.esym == NULL
1227 && expr2->value.function.actual != NULL
1228 && expr2->value.function.actual->next != NULL)
1230 gfc_actual_arglist *arg, *var_arg;
1232 switch (expr2->value.function.isym->id)
1240 if (expr2->value.function.actual->next->next != NULL)
1242 gfc_error ("!$OMP ATOMIC assignment intrinsic IAND, IOR "
1243 "or IEOR must have two arguments at %L",
1249 gfc_error ("!$OMP ATOMIC assignment intrinsic must be "
1250 "MIN, MAX, IAND, IOR or IEOR at %L",
1256 for (arg = expr2->value.function.actual; arg; arg = arg->next)
1258 if ((arg == expr2->value.function.actual
1259 || (var_arg == NULL && arg->next == NULL))
1260 && arg->expr->expr_type == EXPR_VARIABLE
1261 && arg->expr->symtree != NULL
1262 && arg->expr->symtree->n.sym == var)
1264 else if (expr_references_sym (arg->expr, var, NULL))
1265 gfc_error ("!$OMP ATOMIC intrinsic arguments except one must not "
1266 "reference '%s' at %L", var->name, &arg->expr->where);
1267 if (arg->expr->rank != 0)
1268 gfc_error ("!$OMP ATOMIC intrinsic arguments must be scalar "
1269 "at %L", &arg->expr->where);
1272 if (var_arg == NULL)
1274 gfc_error ("First or last !$OMP ATOMIC intrinsic argument must "
1275 "be '%s' at %L", var->name, &expr2->where);
1279 if (var_arg != expr2->value.function.actual)
1281 /* Canonicalize, so that var comes first. */
1282 gcc_assert (var_arg->next == NULL);
1283 for (arg = expr2->value.function.actual;
1284 arg->next != var_arg; arg = arg->next)
1286 var_arg->next = expr2->value.function.actual;
1287 expr2->value.function.actual = var_arg;
1292 gfc_error ("!$OMP ATOMIC assignment must have an operator or intrinsic "
1293 "on right hand side at %L", &expr2->where);
1300 struct pointer_set_t *sharing_clauses;
1301 struct pointer_set_t *private_iterators;
1302 struct omp_context *previous;
1304 static gfc_code *omp_current_do_code;
1305 static int omp_current_do_collapse;
1308 gfc_resolve_omp_do_blocks (gfc_code *code, gfc_namespace *ns)
1310 if (code->block->next && code->block->next->op == EXEC_DO)
1315 omp_current_do_code = code->block->next;
1316 omp_current_do_collapse = code->ext.omp_clauses->collapse;
1317 for (i = 1, c = omp_current_do_code; i < omp_current_do_collapse; i++)
1320 if (c->op != EXEC_DO || c->next == NULL)
1323 if (c->op != EXEC_DO)
1326 if (i < omp_current_do_collapse || omp_current_do_collapse <= 0)
1327 omp_current_do_collapse = 1;
1329 gfc_resolve_blocks (code->block, ns);
1330 omp_current_do_collapse = 0;
1331 omp_current_do_code = NULL;
1336 gfc_resolve_omp_parallel_blocks (gfc_code *code, gfc_namespace *ns)
1338 struct omp_context ctx;
1339 gfc_omp_clauses *omp_clauses = code->ext.omp_clauses;
1344 ctx.sharing_clauses = pointer_set_create ();
1345 ctx.private_iterators = pointer_set_create ();
1346 ctx.previous = omp_current_ctx;
1347 omp_current_ctx = &ctx;
1349 for (list = 0; list < OMP_LIST_NUM; list++)
1350 for (n = omp_clauses->lists[list]; n; n = n->next)
1351 pointer_set_insert (ctx.sharing_clauses, n->sym);
1353 if (code->op == EXEC_OMP_PARALLEL_DO)
1354 gfc_resolve_omp_do_blocks (code, ns);
1356 gfc_resolve_blocks (code->block, ns);
1358 omp_current_ctx = ctx.previous;
1359 pointer_set_destroy (ctx.sharing_clauses);
1360 pointer_set_destroy (ctx.private_iterators);
1364 /* Note a DO iterator variable. This is special in !$omp parallel
1365 construct, where they are predetermined private. */
1368 gfc_resolve_do_iterator (gfc_code *code, gfc_symbol *sym)
1370 int i = omp_current_do_collapse;
1371 gfc_code *c = omp_current_do_code;
1373 if (sym->attr.threadprivate)
1376 /* !$omp do and !$omp parallel do iteration variable is predetermined
1377 private just in the !$omp do resp. !$omp parallel do construct,
1378 with no implications for the outer parallel constructs. */
1388 if (omp_current_ctx == NULL)
1391 if (pointer_set_contains (omp_current_ctx->sharing_clauses, sym))
1394 if (! pointer_set_insert (omp_current_ctx->private_iterators, sym))
1396 gfc_omp_clauses *omp_clauses = omp_current_ctx->code->ext.omp_clauses;
1399 p = gfc_get_namelist ();
1401 p->next = omp_clauses->lists[OMP_LIST_PRIVATE];
1402 omp_clauses->lists[OMP_LIST_PRIVATE] = p;
1408 resolve_omp_do (gfc_code *code)
1410 gfc_code *do_code, *c;
1411 int list, i, collapse;
1415 if (code->ext.omp_clauses)
1416 resolve_omp_clauses (code);
1418 do_code = code->block->next;
1419 collapse = code->ext.omp_clauses->collapse;
1422 for (i = 1; i <= collapse; i++)
1424 if (do_code->op == EXEC_DO_WHILE)
1426 gfc_error ("!$OMP DO cannot be a DO WHILE or DO without loop control "
1427 "at %L", &do_code->loc);
1430 gcc_assert (do_code->op == EXEC_DO);
1431 if (do_code->ext.iterator->var->ts.type != BT_INTEGER)
1432 gfc_error ("!$OMP DO iteration variable must be of type integer at %L",
1434 dovar = do_code->ext.iterator->var->symtree->n.sym;
1435 if (dovar->attr.threadprivate)
1436 gfc_error ("!$OMP DO iteration variable must not be THREADPRIVATE "
1437 "at %L", &do_code->loc);
1438 if (code->ext.omp_clauses)
1439 for (list = 0; list < OMP_LIST_NUM; list++)
1440 if (list != OMP_LIST_PRIVATE && list != OMP_LIST_LASTPRIVATE)
1441 for (n = code->ext.omp_clauses->lists[list]; n; n = n->next)
1442 if (dovar == n->sym)
1444 gfc_error ("!$OMP DO iteration variable present on clause "
1445 "other than PRIVATE or LASTPRIVATE at %L",
1451 gfc_code *do_code2 = code->block->next;
1454 for (j = 1; j < i; j++)
1456 gfc_symbol *ivar = do_code2->ext.iterator->var->symtree->n.sym;
1458 || gfc_find_sym_in_expr (ivar, do_code->ext.iterator->start)
1459 || gfc_find_sym_in_expr (ivar, do_code->ext.iterator->end)
1460 || gfc_find_sym_in_expr (ivar, do_code->ext.iterator->step))
1462 gfc_error ("!$OMP DO collapsed loops don't form rectangular iteration space at %L",
1468 do_code2 = do_code2->block->next;
1473 for (c = do_code->next; c; c = c->next)
1474 if (c->op != EXEC_NOP && c->op != EXEC_CONTINUE)
1476 gfc_error ("collapsed !$OMP DO loops not perfectly nested at %L",
1482 do_code = do_code->block;
1483 if (do_code->op != EXEC_DO && do_code->op != EXEC_DO_WHILE)
1485 gfc_error ("not enough DO loops for collapsed !$OMP DO at %L",
1489 do_code = do_code->next;
1490 if (do_code->op != EXEC_DO && do_code->op != EXEC_DO_WHILE)
1492 gfc_error ("not enough DO loops for collapsed !$OMP DO at %L",
1500 /* Resolve OpenMP directive clauses and check various requirements
1501 of each directive. */
1504 gfc_resolve_omp_directive (gfc_code *code, gfc_namespace *ns ATTRIBUTE_UNUSED)
1506 if (code->op != EXEC_OMP_ATOMIC)
1507 gfc_maybe_initialize_eh ();
1512 case EXEC_OMP_PARALLEL_DO:
1513 resolve_omp_do (code);
1515 case EXEC_OMP_WORKSHARE:
1516 case EXEC_OMP_PARALLEL_WORKSHARE:
1517 case EXEC_OMP_PARALLEL:
1518 case EXEC_OMP_PARALLEL_SECTIONS:
1519 case EXEC_OMP_SECTIONS:
1520 case EXEC_OMP_SINGLE:
1521 if (code->ext.omp_clauses)
1522 resolve_omp_clauses (code);
1524 case EXEC_OMP_ATOMIC:
1525 resolve_omp_atomic (code);