1 /* OpenMP directive matching and resolving.
2 Copyright (C) 2005, 2006, 2007
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 2, 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 COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
29 #include "pointer-set.h"
33 /* Match an end of OpenMP directive. End of OpenMP directive is optional
34 whitespace, followed by '\n' or comment '!'. */
37 gfc_match_omp_eos (void)
42 old_loc = gfc_current_locus;
43 gfc_gobble_whitespace ();
58 gfc_current_locus = old_loc;
62 /* Free an omp_clauses structure. */
65 gfc_free_omp_clauses (gfc_omp_clauses *c)
71 gfc_free_expr (c->if_expr);
72 gfc_free_expr (c->num_threads);
73 gfc_free_expr (c->chunk_size);
74 for (i = 0; i < OMP_LIST_NUM; i++)
75 gfc_free_namelist (c->lists[i]);
79 /* Match a variable/common block list and construct a namelist from it. */
82 gfc_match_omp_variable_list (const char *str, gfc_namelist **list,
85 gfc_namelist *head, *tail, *p;
87 char n[GFC_MAX_SYMBOL_LEN+1];
94 old_loc = gfc_current_locus;
102 m = gfc_match_symbol (&sym, 1);
106 gfc_set_sym_referenced (sym);
107 p = gfc_get_namelist ();
126 m = gfc_match (" / %n /", n);
127 if (m == MATCH_ERROR)
132 st = gfc_find_symtree (gfc_current_ns->common_root, n);
135 gfc_error ("COMMON block /%s/ not found at %C", n);
138 for (sym = st->n.common->head; sym; sym = sym->common_next)
140 gfc_set_sym_referenced (sym);
141 p = gfc_get_namelist ();
153 if (gfc_match_char (')') == MATCH_YES)
155 if (gfc_match_char (',') != MATCH_YES)
160 list = &(*list)->next;
166 gfc_error ("Syntax error in OpenMP variable list at %C");
169 gfc_free_namelist (head);
170 gfc_current_locus = old_loc;
174 #define OMP_CLAUSE_PRIVATE (1 << 0)
175 #define OMP_CLAUSE_FIRSTPRIVATE (1 << 1)
176 #define OMP_CLAUSE_LASTPRIVATE (1 << 2)
177 #define OMP_CLAUSE_COPYPRIVATE (1 << 3)
178 #define OMP_CLAUSE_SHARED (1 << 4)
179 #define OMP_CLAUSE_COPYIN (1 << 5)
180 #define OMP_CLAUSE_REDUCTION (1 << 6)
181 #define OMP_CLAUSE_IF (1 << 7)
182 #define OMP_CLAUSE_NUM_THREADS (1 << 8)
183 #define OMP_CLAUSE_SCHEDULE (1 << 9)
184 #define OMP_CLAUSE_DEFAULT (1 << 10)
185 #define OMP_CLAUSE_ORDERED (1 << 11)
187 /* Match OpenMP directive clauses. MASK is a bitmask of
188 clauses that are allowed for a particular directive. */
191 gfc_match_omp_clauses (gfc_omp_clauses **cp, int mask)
193 gfc_omp_clauses *c = gfc_get_omp_clauses ();
195 bool needs_space = true, first = true;
200 if ((first || gfc_match_char (',') != MATCH_YES)
201 && (needs_space && gfc_match_space () != MATCH_YES))
205 gfc_gobble_whitespace ();
206 if ((mask & OMP_CLAUSE_IF) && c->if_expr == NULL
207 && gfc_match ("if ( %e )", &c->if_expr) == MATCH_YES)
209 if ((mask & OMP_CLAUSE_NUM_THREADS) && c->num_threads == NULL
210 && gfc_match ("num_threads ( %e )", &c->num_threads) == MATCH_YES)
212 if ((mask & OMP_CLAUSE_PRIVATE)
213 && gfc_match_omp_variable_list ("private (",
214 &c->lists[OMP_LIST_PRIVATE], true)
217 if ((mask & OMP_CLAUSE_FIRSTPRIVATE)
218 && gfc_match_omp_variable_list ("firstprivate (",
219 &c->lists[OMP_LIST_FIRSTPRIVATE],
223 if ((mask & OMP_CLAUSE_LASTPRIVATE)
224 && gfc_match_omp_variable_list ("lastprivate (",
225 &c->lists[OMP_LIST_LASTPRIVATE],
229 if ((mask & OMP_CLAUSE_COPYPRIVATE)
230 && gfc_match_omp_variable_list ("copyprivate (",
231 &c->lists[OMP_LIST_COPYPRIVATE],
235 if ((mask & OMP_CLAUSE_SHARED)
236 && gfc_match_omp_variable_list ("shared (",
237 &c->lists[OMP_LIST_SHARED], true)
240 if ((mask & OMP_CLAUSE_COPYIN)
241 && gfc_match_omp_variable_list ("copyin (",
242 &c->lists[OMP_LIST_COPYIN], true)
245 old_loc = gfc_current_locus;
246 if ((mask & OMP_CLAUSE_REDUCTION)
247 && gfc_match ("reduction ( ") == MATCH_YES)
249 int reduction = OMP_LIST_NUM;
250 char buffer[GFC_MAX_SYMBOL_LEN + 1];
251 if (gfc_match_char ('+') == MATCH_YES)
252 reduction = OMP_LIST_PLUS;
253 else if (gfc_match_char ('*') == MATCH_YES)
254 reduction = OMP_LIST_MULT;
255 else if (gfc_match_char ('-') == MATCH_YES)
256 reduction = OMP_LIST_SUB;
257 else if (gfc_match (".and.") == MATCH_YES)
258 reduction = OMP_LIST_AND;
259 else if (gfc_match (".or.") == MATCH_YES)
260 reduction = OMP_LIST_OR;
261 else if (gfc_match (".eqv.") == MATCH_YES)
262 reduction = OMP_LIST_EQV;
263 else if (gfc_match (".neqv.") == MATCH_YES)
264 reduction = OMP_LIST_NEQV;
265 else if (gfc_match_name (buffer) == MATCH_YES)
268 const char *n = buffer;
270 gfc_find_symbol (buffer, NULL, 1, &sym);
273 if (sym->attr.intrinsic)
275 else if ((sym->attr.flavor != FL_UNKNOWN
276 && sym->attr.flavor != FL_PROCEDURE)
277 || sym->attr.external
282 || sym->attr.subroutine
285 || sym->attr.cray_pointer
286 || sym->attr.cray_pointee
287 || (sym->attr.proc != PROC_UNKNOWN
288 && sym->attr.proc != PROC_INTRINSIC)
289 || sym->attr.if_source != IFSRC_UNKNOWN
290 || sym == sym->ns->proc_name)
292 gfc_error_now ("%s is not INTRINSIC procedure name "
299 if (strcmp (n, "max") == 0)
300 reduction = OMP_LIST_MAX;
301 else if (strcmp (n, "min") == 0)
302 reduction = OMP_LIST_MIN;
303 else if (strcmp (n, "iand") == 0)
304 reduction = OMP_LIST_IAND;
305 else if (strcmp (n, "ior") == 0)
306 reduction = OMP_LIST_IOR;
307 else if (strcmp (n, "ieor") == 0)
308 reduction = OMP_LIST_IEOR;
309 if (reduction != OMP_LIST_NUM
311 && ! sym->attr.intrinsic
312 && ! sym->attr.use_assoc
313 && ((sym->attr.flavor == FL_UNKNOWN
314 && gfc_add_flavor (&sym->attr, FL_PROCEDURE,
315 sym->name, NULL) == FAILURE)
316 || gfc_add_intrinsic (&sym->attr, NULL) == FAILURE))
318 gfc_free_omp_clauses (c);
322 if (reduction != OMP_LIST_NUM
323 && gfc_match_omp_variable_list (" :", &c->lists[reduction],
328 gfc_current_locus = old_loc;
330 if ((mask & OMP_CLAUSE_DEFAULT)
331 && c->default_sharing == OMP_DEFAULT_UNKNOWN)
333 if (gfc_match ("default ( shared )") == MATCH_YES)
334 c->default_sharing = OMP_DEFAULT_SHARED;
335 else if (gfc_match ("default ( private )") == MATCH_YES)
336 c->default_sharing = OMP_DEFAULT_PRIVATE;
337 else if (gfc_match ("default ( none )") == MATCH_YES)
338 c->default_sharing = OMP_DEFAULT_NONE;
339 if (c->default_sharing != OMP_DEFAULT_UNKNOWN)
342 old_loc = gfc_current_locus;
343 if ((mask & OMP_CLAUSE_SCHEDULE)
344 && c->sched_kind == OMP_SCHED_NONE
345 && gfc_match ("schedule ( ") == MATCH_YES)
347 if (gfc_match ("static") == MATCH_YES)
348 c->sched_kind = OMP_SCHED_STATIC;
349 else if (gfc_match ("dynamic") == MATCH_YES)
350 c->sched_kind = OMP_SCHED_DYNAMIC;
351 else if (gfc_match ("guided") == MATCH_YES)
352 c->sched_kind = OMP_SCHED_GUIDED;
353 else if (gfc_match ("runtime") == MATCH_YES)
354 c->sched_kind = OMP_SCHED_RUNTIME;
355 if (c->sched_kind != OMP_SCHED_NONE)
358 if (c->sched_kind != OMP_SCHED_RUNTIME)
359 m = gfc_match (" , %e )", &c->chunk_size);
361 m = gfc_match_char (')');
363 c->sched_kind = OMP_SCHED_NONE;
365 if (c->sched_kind != OMP_SCHED_NONE)
368 gfc_current_locus = old_loc;
370 if ((mask & OMP_CLAUSE_ORDERED) && !c->ordered
371 && gfc_match ("ordered") == MATCH_YES)
373 c->ordered = needs_space = true;
380 if (gfc_match_omp_eos () != MATCH_YES)
382 gfc_free_omp_clauses (c);
390 #define OMP_PARALLEL_CLAUSES \
391 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE | OMP_CLAUSE_SHARED \
392 | OMP_CLAUSE_COPYIN | OMP_CLAUSE_REDUCTION | OMP_CLAUSE_IF \
393 | OMP_CLAUSE_NUM_THREADS | OMP_CLAUSE_DEFAULT)
394 #define OMP_DO_CLAUSES \
395 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE \
396 | OMP_CLAUSE_LASTPRIVATE | OMP_CLAUSE_REDUCTION \
397 | OMP_CLAUSE_SCHEDULE | OMP_CLAUSE_ORDERED)
398 #define OMP_SECTIONS_CLAUSES \
399 (OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE \
400 | OMP_CLAUSE_LASTPRIVATE | OMP_CLAUSE_REDUCTION)
403 gfc_match_omp_parallel (void)
406 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES) != MATCH_YES)
408 new_st.op = EXEC_OMP_PARALLEL;
409 new_st.ext.omp_clauses = c;
415 gfc_match_omp_critical (void)
417 char n[GFC_MAX_SYMBOL_LEN+1];
419 if (gfc_match (" ( %n )", n) != MATCH_YES)
421 if (gfc_match_omp_eos () != MATCH_YES)
423 new_st.op = EXEC_OMP_CRITICAL;
424 new_st.ext.omp_name = n[0] ? xstrdup (n) : NULL;
430 gfc_match_omp_do (void)
433 if (gfc_match_omp_clauses (&c, OMP_DO_CLAUSES) != MATCH_YES)
435 new_st.op = EXEC_OMP_DO;
436 new_st.ext.omp_clauses = c;
442 gfc_match_omp_flush (void)
444 gfc_namelist *list = NULL;
445 gfc_match_omp_variable_list (" (", &list, true);
446 if (gfc_match_omp_eos () != MATCH_YES)
448 gfc_free_namelist (list);
451 new_st.op = EXEC_OMP_FLUSH;
452 new_st.ext.omp_namelist = list;
458 gfc_match_omp_threadprivate (void)
461 char n[GFC_MAX_SYMBOL_LEN+1];
466 old_loc = gfc_current_locus;
468 m = gfc_match (" (");
474 m = gfc_match_symbol (&sym, 0);
478 if (sym->attr.in_common)
479 gfc_error_now ("Threadprivate variable at %C is an element of "
481 else if (gfc_add_threadprivate (&sym->attr, sym->name,
482 &sym->declared_at) == FAILURE)
491 m = gfc_match (" / %n /", n);
492 if (m == MATCH_ERROR)
494 if (m == MATCH_NO || n[0] == '\0')
497 st = gfc_find_symtree (gfc_current_ns->common_root, n);
500 gfc_error ("COMMON block /%s/ not found at %C", n);
503 st->n.common->threadprivate = 1;
504 for (sym = st->n.common->head; sym; sym = sym->common_next)
505 if (gfc_add_threadprivate (&sym->attr, sym->name,
506 &sym->declared_at) == FAILURE)
510 if (gfc_match_char (')') == MATCH_YES)
512 if (gfc_match_char (',') != MATCH_YES)
519 gfc_error ("Syntax error in !$OMP THREADPRIVATE list at %C");
522 gfc_current_locus = old_loc;
528 gfc_match_omp_parallel_do (void)
531 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES | OMP_DO_CLAUSES)
534 new_st.op = EXEC_OMP_PARALLEL_DO;
535 new_st.ext.omp_clauses = c;
541 gfc_match_omp_parallel_sections (void)
544 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES | OMP_SECTIONS_CLAUSES)
547 new_st.op = EXEC_OMP_PARALLEL_SECTIONS;
548 new_st.ext.omp_clauses = c;
554 gfc_match_omp_parallel_workshare (void)
557 if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES) != MATCH_YES)
559 new_st.op = EXEC_OMP_PARALLEL_WORKSHARE;
560 new_st.ext.omp_clauses = c;
566 gfc_match_omp_sections (void)
569 if (gfc_match_omp_clauses (&c, OMP_SECTIONS_CLAUSES) != MATCH_YES)
571 new_st.op = EXEC_OMP_SECTIONS;
572 new_st.ext.omp_clauses = c;
578 gfc_match_omp_single (void)
581 if (gfc_match_omp_clauses (&c, OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE)
584 new_st.op = EXEC_OMP_SINGLE;
585 new_st.ext.omp_clauses = c;
591 gfc_match_omp_workshare (void)
593 if (gfc_match_omp_eos () != MATCH_YES)
595 new_st.op = EXEC_OMP_WORKSHARE;
596 new_st.ext.omp_clauses = gfc_get_omp_clauses ();
602 gfc_match_omp_master (void)
604 if (gfc_match_omp_eos () != MATCH_YES)
606 new_st.op = EXEC_OMP_MASTER;
607 new_st.ext.omp_clauses = NULL;
613 gfc_match_omp_ordered (void)
615 if (gfc_match_omp_eos () != MATCH_YES)
617 new_st.op = EXEC_OMP_ORDERED;
618 new_st.ext.omp_clauses = NULL;
624 gfc_match_omp_atomic (void)
626 if (gfc_match_omp_eos () != MATCH_YES)
628 new_st.op = EXEC_OMP_ATOMIC;
629 new_st.ext.omp_clauses = NULL;
635 gfc_match_omp_barrier (void)
637 if (gfc_match_omp_eos () != MATCH_YES)
639 new_st.op = EXEC_OMP_BARRIER;
640 new_st.ext.omp_clauses = NULL;
646 gfc_match_omp_end_nowait (void)
649 if (gfc_match ("% nowait") == MATCH_YES)
651 if (gfc_match_omp_eos () != MATCH_YES)
653 new_st.op = EXEC_OMP_END_NOWAIT;
654 new_st.ext.omp_bool = nowait;
660 gfc_match_omp_end_single (void)
663 if (gfc_match ("% nowait") == MATCH_YES)
665 new_st.op = EXEC_OMP_END_NOWAIT;
666 new_st.ext.omp_bool = true;
669 if (gfc_match_omp_clauses (&c, OMP_CLAUSE_COPYPRIVATE) != MATCH_YES)
671 new_st.op = EXEC_OMP_END_SINGLE;
672 new_st.ext.omp_clauses = c;
677 /* OpenMP directive resolving routines. */
680 resolve_omp_clauses (gfc_code *code)
682 gfc_omp_clauses *omp_clauses = code->ext.omp_clauses;
685 static const char *clause_names[]
686 = { "PRIVATE", "FIRSTPRIVATE", "LASTPRIVATE", "COPYPRIVATE", "SHARED",
687 "COPYIN", "REDUCTION" };
689 if (omp_clauses == NULL)
692 if (omp_clauses->if_expr)
694 gfc_expr *expr = omp_clauses->if_expr;
695 if (gfc_resolve_expr (expr) == FAILURE
696 || expr->ts.type != BT_LOGICAL || expr->rank != 0)
697 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
700 if (omp_clauses->num_threads)
702 gfc_expr *expr = omp_clauses->num_threads;
703 if (gfc_resolve_expr (expr) == FAILURE
704 || expr->ts.type != BT_INTEGER || expr->rank != 0)
705 gfc_error ("NUM_THREADS clause at %L requires a scalar "
706 "INTEGER expression", &expr->where);
708 if (omp_clauses->chunk_size)
710 gfc_expr *expr = omp_clauses->chunk_size;
711 if (gfc_resolve_expr (expr) == FAILURE
712 || expr->ts.type != BT_INTEGER || expr->rank != 0)
713 gfc_error ("SCHEDULE clause's chunk_size at %L requires "
714 "a scalar INTEGER expression", &expr->where);
717 /* Check that no symbol appears on multiple clauses, except that
718 a symbol can appear on both firstprivate and lastprivate. */
719 for (list = 0; list < OMP_LIST_NUM; list++)
720 for (n = omp_clauses->lists[list]; n; n = n->next)
723 for (list = 0; list < OMP_LIST_NUM; list++)
724 if (list != OMP_LIST_FIRSTPRIVATE && list != OMP_LIST_LASTPRIVATE)
725 for (n = omp_clauses->lists[list]; n; n = n->next)
727 gfc_error ("Symbol '%s' present on multiple clauses at %L",
728 n->sym->name, &code->loc);
732 gcc_assert (OMP_LIST_LASTPRIVATE == OMP_LIST_FIRSTPRIVATE + 1);
733 for (list = OMP_LIST_FIRSTPRIVATE; list <= OMP_LIST_LASTPRIVATE; list++)
734 for (n = omp_clauses->lists[list]; n; n = n->next)
737 gfc_error ("Symbol '%s' present on multiple clauses at %L",
738 n->sym->name, &code->loc);
742 for (n = omp_clauses->lists[OMP_LIST_FIRSTPRIVATE]; n; n = n->next)
744 gfc_error ("Symbol '%s' present on multiple clauses at %L",
745 n->sym->name, &code->loc);
749 for (n = omp_clauses->lists[OMP_LIST_LASTPRIVATE]; n; n = n->next)
752 for (n = omp_clauses->lists[OMP_LIST_LASTPRIVATE]; n; n = n->next)
754 gfc_error ("Symbol '%s' present on multiple clauses at %L",
755 n->sym->name, &code->loc);
759 for (list = 0; list < OMP_LIST_NUM; list++)
760 if ((n = omp_clauses->lists[list]) != NULL)
764 if (list < OMP_LIST_REDUCTION_FIRST)
765 name = clause_names[list];
766 else if (list <= OMP_LIST_REDUCTION_LAST)
767 name = clause_names[OMP_LIST_REDUCTION_FIRST];
773 case OMP_LIST_COPYIN:
774 for (; n != NULL; n = n->next)
776 if (!n->sym->attr.threadprivate)
777 gfc_error ("Non-THREADPRIVATE object '%s' in COPYIN clause"
778 " at %L", n->sym->name, &code->loc);
779 if (n->sym->attr.allocatable)
780 gfc_error ("COPYIN clause object '%s' is ALLOCATABLE at %L",
781 n->sym->name, &code->loc);
784 case OMP_LIST_COPYPRIVATE:
785 for (; n != NULL; n = n->next)
787 if (n->sym->as && n->sym->as->type == AS_ASSUMED_SIZE)
788 gfc_error ("Assumed size array '%s' in COPYPRIVATE clause "
789 "at %L", n->sym->name, &code->loc);
790 if (n->sym->attr.allocatable)
791 gfc_error ("COPYPRIVATE clause object '%s' is ALLOCATABLE "
792 "at %L", n->sym->name, &code->loc);
795 case OMP_LIST_SHARED:
796 for (; n != NULL; n = n->next)
798 if (n->sym->attr.threadprivate)
799 gfc_error ("THREADPRIVATE object '%s' in SHARED clause at "
800 "%L", n->sym->name, &code->loc);
801 if (n->sym->attr.cray_pointee)
802 gfc_error ("Cray pointee '%s' in SHARED clause at %L",
803 n->sym->name, &code->loc);
807 for (; n != NULL; n = n->next)
809 if (n->sym->attr.threadprivate)
810 gfc_error ("THREADPRIVATE object '%s' in %s clause at %L",
811 n->sym->name, name, &code->loc);
812 if (n->sym->attr.cray_pointee)
813 gfc_error ("Cray pointee '%s' in %s clause at %L",
814 n->sym->name, name, &code->loc);
815 if (list != OMP_LIST_PRIVATE)
817 if (n->sym->attr.pointer)
818 gfc_error ("POINTER object '%s' in %s clause at %L",
819 n->sym->name, name, &code->loc);
820 if (n->sym->attr.allocatable)
821 gfc_error ("%s clause object '%s' is ALLOCATABLE at %L",
822 name, n->sym->name, &code->loc);
823 if (n->sym->attr.cray_pointer)
824 gfc_error ("Cray pointer '%s' in %s clause at %L",
825 n->sym->name, name, &code->loc);
827 if (n->sym->as && n->sym->as->type == AS_ASSUMED_SIZE)
828 gfc_error ("Assumed size array '%s' in %s clause at %L",
829 n->sym->name, name, &code->loc);
830 if (n->sym->attr.in_namelist
831 && (list < OMP_LIST_REDUCTION_FIRST
832 || list > OMP_LIST_REDUCTION_LAST))
833 gfc_error ("Variable '%s' in %s clause is used in "
834 "NAMELIST statement at %L",
835 n->sym->name, name, &code->loc);
841 if (!gfc_numeric_ts (&n->sym->ts))
842 gfc_error ("%c REDUCTION variable '%s' is %s at %L",
843 list == OMP_LIST_PLUS ? '+'
844 : list == OMP_LIST_MULT ? '*' : '-',
845 n->sym->name, gfc_typename (&n->sym->ts),
852 if (n->sym->ts.type != BT_LOGICAL)
853 gfc_error ("%s REDUCTION variable '%s' must be LOGICAL "
855 list == OMP_LIST_AND ? ".AND."
856 : list == OMP_LIST_OR ? ".OR."
857 : list == OMP_LIST_EQV ? ".EQV." : ".NEQV.",
858 n->sym->name, &code->loc);
862 if (n->sym->ts.type != BT_INTEGER
863 && n->sym->ts.type != BT_REAL)
864 gfc_error ("%s REDUCTION variable '%s' must be "
865 "INTEGER or REAL at %L",
866 list == OMP_LIST_MAX ? "MAX" : "MIN",
867 n->sym->name, &code->loc);
872 if (n->sym->ts.type != BT_INTEGER)
873 gfc_error ("%s REDUCTION variable '%s' must be INTEGER "
875 list == OMP_LIST_IAND ? "IAND"
876 : list == OMP_LIST_MULT ? "IOR" : "IEOR",
877 n->sym->name, &code->loc);
879 /* Workaround for PR middle-end/26316, nothing really needs
880 to be done here for OMP_LIST_PRIVATE. */
881 case OMP_LIST_PRIVATE:
882 gcc_assert (code->op != EXEC_NOP);
893 /* Return true if SYM is ever referenced in EXPR except in the SE node. */
896 expr_references_sym (gfc_expr *e, gfc_symbol *s, gfc_expr *se)
898 gfc_actual_arglist *arg;
899 if (e == NULL || e == se)
901 switch (e->expr_type)
908 if (e->symtree != NULL
909 && e->symtree->n.sym == s)
914 && (expr_references_sym (e->ref->u.ss.start, s, se)
915 || expr_references_sym (e->ref->u.ss.end, s, se)))
919 if (expr_references_sym (e->value.op.op2, s, se))
921 return expr_references_sym (e->value.op.op1, s, se);
923 for (arg = e->value.function.actual; arg; arg = arg->next)
924 if (expr_references_sym (arg->expr, s, se))
933 /* If EXPR is a conversion function that widens the type
934 if WIDENING is true or narrows the type if WIDENING is false,
935 return the inner expression, otherwise return NULL. */
938 is_conversion (gfc_expr *expr, bool widening)
940 gfc_typespec *ts1, *ts2;
942 if (expr->expr_type != EXPR_FUNCTION
943 || expr->value.function.isym == NULL
944 || expr->value.function.esym != NULL
945 || expr->value.function.isym->generic_id != GFC_ISYM_CONVERSION)
951 ts2 = &expr->value.function.actual->expr->ts;
955 ts1 = &expr->value.function.actual->expr->ts;
959 if (ts1->type > ts2->type
960 || (ts1->type == ts2->type && ts1->kind > ts2->kind))
961 return expr->value.function.actual->expr;
968 resolve_omp_atomic (gfc_code *code)
973 code = code->block->next;
974 gcc_assert (code->op == EXEC_ASSIGN);
975 gcc_assert (code->next == NULL);
977 if (code->expr->expr_type != EXPR_VARIABLE
978 || code->expr->symtree == NULL
979 || code->expr->rank != 0
980 || (code->expr->ts.type != BT_INTEGER
981 && code->expr->ts.type != BT_REAL
982 && code->expr->ts.type != BT_COMPLEX
983 && code->expr->ts.type != BT_LOGICAL))
985 gfc_error ("!$OMP ATOMIC statement must set a scalar variable of "
986 "intrinsic type at %L", &code->loc);
990 var = code->expr->symtree->n.sym;
991 expr2 = is_conversion (code->expr2, false);
995 if (expr2->expr_type == EXPR_OP)
997 gfc_expr *v = NULL, *e, *c;
998 gfc_intrinsic_op op = expr2->value.op.operator;
999 gfc_intrinsic_op alt_op = INTRINSIC_NONE;
1003 case INTRINSIC_PLUS:
1004 alt_op = INTRINSIC_MINUS;
1006 case INTRINSIC_TIMES:
1007 alt_op = INTRINSIC_DIVIDE;
1009 case INTRINSIC_MINUS:
1010 alt_op = INTRINSIC_PLUS;
1012 case INTRINSIC_DIVIDE:
1013 alt_op = INTRINSIC_TIMES;
1019 alt_op = INTRINSIC_NEQV;
1021 case INTRINSIC_NEQV:
1022 alt_op = INTRINSIC_EQV;
1025 gfc_error ("!$OMP ATOMIC assignment operator must be "
1026 "+, *, -, /, .AND., .OR., .EQV. or .NEQV. at %L",
1031 /* Check for var = var op expr resp. var = expr op var where
1032 expr doesn't reference var and var op expr is mathematically
1033 equivalent to var op (expr) resp. expr op var equivalent to
1034 (expr) op var. We rely here on the fact that the matcher
1035 for x op1 y op2 z where op1 and op2 have equal precedence
1036 returns (x op1 y) op2 z. */
1037 e = expr2->value.op.op2;
1038 if (e->expr_type == EXPR_VARIABLE
1039 && e->symtree != NULL
1040 && e->symtree->n.sym == var)
1042 else if ((c = is_conversion (e, true)) != NULL
1043 && c->expr_type == EXPR_VARIABLE
1044 && c->symtree != NULL
1045 && c->symtree->n.sym == var)
1049 gfc_expr **p = NULL, **q;
1050 for (q = &expr2->value.op.op1; (e = *q) != NULL; )
1051 if (e->expr_type == EXPR_VARIABLE
1052 && e->symtree != NULL
1053 && e->symtree->n.sym == var)
1058 else if ((c = is_conversion (e, true)) != NULL)
1059 q = &e->value.function.actual->expr;
1060 else if (e->expr_type != EXPR_OP
1061 || (e->value.op.operator != op
1062 && e->value.op.operator != alt_op)
1068 q = &e->value.op.op1;
1073 gfc_error ("!$OMP ATOMIC assignment must be var = var op expr "
1074 "or var = expr op var at %L", &expr2->where);
1081 switch (e->value.op.operator)
1083 case INTRINSIC_MINUS:
1084 case INTRINSIC_DIVIDE:
1086 case INTRINSIC_NEQV:
1087 gfc_error ("!$OMP ATOMIC var = var op expr not "
1088 "mathematically equivalent to var = var op "
1089 "(expr) at %L", &expr2->where);
1095 /* Canonicalize into var = var op (expr). */
1096 *p = e->value.op.op2;
1097 e->value.op.op2 = expr2;
1099 if (code->expr2 == expr2)
1100 code->expr2 = expr2 = e;
1102 code->expr2->value.function.actual->expr = expr2 = e;
1104 if (!gfc_compare_types (&expr2->value.op.op1->ts, &expr2->ts))
1106 for (p = &expr2->value.op.op1; *p != v;
1107 p = &(*p)->value.function.actual->expr)
1110 gfc_free_expr (expr2->value.op.op1);
1111 expr2->value.op.op1 = v;
1112 gfc_convert_type (v, &expr2->ts, 2);
1117 if (e->rank != 0 || expr_references_sym (code->expr2, var, v))
1119 gfc_error ("expr in !$OMP ATOMIC assignment var = var op expr "
1120 "must be scalar and cannot reference var at %L",
1125 else if (expr2->expr_type == EXPR_FUNCTION
1126 && expr2->value.function.isym != NULL
1127 && expr2->value.function.esym == NULL
1128 && expr2->value.function.actual != NULL
1129 && expr2->value.function.actual->next != NULL)
1131 gfc_actual_arglist *arg, *var_arg;
1133 switch (expr2->value.function.isym->generic_id)
1141 if (expr2->value.function.actual->next->next != NULL)
1143 gfc_error ("!$OMP ATOMIC assignment intrinsic IAND, IOR "
1144 "or IEOR must have two arguments at %L",
1150 gfc_error ("!$OMP ATOMIC assignment intrinsic must be "
1151 "MIN, MAX, IAND, IOR or IEOR at %L",
1157 for (arg = expr2->value.function.actual; arg; arg = arg->next)
1159 if ((arg == expr2->value.function.actual
1160 || (var_arg == NULL && arg->next == NULL))
1161 && arg->expr->expr_type == EXPR_VARIABLE
1162 && arg->expr->symtree != NULL
1163 && arg->expr->symtree->n.sym == var)
1165 else if (expr_references_sym (arg->expr, var, NULL))
1166 gfc_error ("!$OMP ATOMIC intrinsic arguments except one must not "
1167 "reference '%s' at %L", var->name, &arg->expr->where);
1168 if (arg->expr->rank != 0)
1169 gfc_error ("!$OMP ATOMIC intrinsic arguments must be scalar "
1170 "at %L", &arg->expr->where);
1173 if (var_arg == NULL)
1175 gfc_error ("First or last !$OMP ATOMIC intrinsic argument must "
1176 "be '%s' at %L", var->name, &expr2->where);
1180 if (var_arg != expr2->value.function.actual)
1182 /* Canonicalize, so that var comes first. */
1183 gcc_assert (var_arg->next == NULL);
1184 for (arg = expr2->value.function.actual;
1185 arg->next != var_arg; arg = arg->next)
1187 var_arg->next = expr2->value.function.actual;
1188 expr2->value.function.actual = var_arg;
1193 gfc_error ("!$OMP ATOMIC assignment must have an operator or intrinsic "
1194 "on right hand side at %L", &expr2->where);
1201 struct pointer_set_t *sharing_clauses;
1202 struct pointer_set_t *private_iterators;
1203 struct omp_context *previous;
1205 gfc_code *omp_current_do_code;
1209 gfc_resolve_omp_do_blocks (gfc_code *code, gfc_namespace *ns)
1211 if (code->block->next && code->block->next->op == EXEC_DO)
1212 omp_current_do_code = code->block->next;
1213 gfc_resolve_blocks (code->block, ns);
1218 gfc_resolve_omp_parallel_blocks (gfc_code *code, gfc_namespace *ns)
1220 struct omp_context ctx;
1221 gfc_omp_clauses *omp_clauses = code->ext.omp_clauses;
1226 ctx.sharing_clauses = pointer_set_create ();
1227 ctx.private_iterators = pointer_set_create ();
1228 ctx.previous = omp_current_ctx;
1229 omp_current_ctx = &ctx;
1231 for (list = 0; list < OMP_LIST_NUM; list++)
1232 for (n = omp_clauses->lists[list]; n; n = n->next)
1233 pointer_set_insert (ctx.sharing_clauses, n->sym);
1235 if (code->op == EXEC_OMP_PARALLEL_DO)
1236 gfc_resolve_omp_do_blocks (code, ns);
1238 gfc_resolve_blocks (code->block, ns);
1240 omp_current_ctx = ctx.previous;
1241 pointer_set_destroy (ctx.sharing_clauses);
1242 pointer_set_destroy (ctx.private_iterators);
1246 /* Note a DO iterator variable. This is special in !$omp parallel
1247 construct, where they are predetermined private. */
1250 gfc_resolve_do_iterator (gfc_code *code, gfc_symbol *sym)
1252 struct omp_context *ctx;
1254 if (sym->attr.threadprivate)
1257 /* !$omp do and !$omp parallel do iteration variable is predetermined
1258 private just in the !$omp do resp. !$omp parallel do construct,
1259 with no implications for the outer parallel constructs. */
1260 if (code == omp_current_do_code)
1263 for (ctx = omp_current_ctx; ctx; ctx = ctx->previous)
1265 if (pointer_set_contains (ctx->sharing_clauses, sym))
1268 if (! pointer_set_insert (ctx->private_iterators, sym))
1270 gfc_omp_clauses *omp_clauses = ctx->code->ext.omp_clauses;
1273 p = gfc_get_namelist ();
1275 p->next = omp_clauses->lists[OMP_LIST_PRIVATE];
1276 omp_clauses->lists[OMP_LIST_PRIVATE] = p;
1283 resolve_omp_do (gfc_code *code)
1290 if (code->ext.omp_clauses)
1291 resolve_omp_clauses (code);
1293 do_code = code->block->next;
1294 if (do_code->op == EXEC_DO_WHILE)
1295 gfc_error ("!$OMP DO cannot be a DO WHILE or DO without loop control "
1296 "at %L", &do_code->loc);
1299 gcc_assert (do_code->op == EXEC_DO);
1300 if (do_code->ext.iterator->var->ts.type != BT_INTEGER)
1301 gfc_error ("!$OMP DO iteration variable must be of type integer at %L",
1303 dovar = do_code->ext.iterator->var->symtree->n.sym;
1304 if (dovar->attr.threadprivate)
1305 gfc_error ("!$OMP DO iteration variable must not be THREADPRIVATE "
1306 "at %L", &do_code->loc);
1307 if (code->ext.omp_clauses)
1308 for (list = 0; list < OMP_LIST_NUM; list++)
1309 if (list != OMP_LIST_PRIVATE && list != OMP_LIST_LASTPRIVATE)
1310 for (n = code->ext.omp_clauses->lists[list]; n; n = n->next)
1311 if (dovar == n->sym)
1313 gfc_error ("!$OMP DO iteration variable present on clause "
1314 "other than PRIVATE or LASTPRIVATE at %L",
1322 /* Resolve OpenMP directive clauses and check various requirements
1323 of each directive. */
1326 gfc_resolve_omp_directive (gfc_code *code, gfc_namespace *ns ATTRIBUTE_UNUSED)
1331 case EXEC_OMP_PARALLEL_DO:
1332 resolve_omp_do (code);
1334 case EXEC_OMP_WORKSHARE:
1335 case EXEC_OMP_PARALLEL_WORKSHARE:
1336 case EXEC_OMP_PARALLEL:
1337 case EXEC_OMP_PARALLEL_SECTIONS:
1338 case EXEC_OMP_SECTIONS:
1339 case EXEC_OMP_SINGLE:
1340 if (code->ext.omp_clauses)
1341 resolve_omp_clauses (code);
1343 case EXEC_OMP_ATOMIC:
1344 resolve_omp_atomic (code);