1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
|
/* OpenMP directive matching and resolving.
Copyright (C) 2005, 2006, 2007, 2008, 2010
Free Software Foundation, Inc.
Contributed by Jakub Jelinek
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "flags.h"
#include "gfortran.h"
#include "match.h"
#include "parse.h"
#include "pointer-set.h"
#include "target.h"
#include "toplev.h"
/* Match an end of OpenMP directive. End of OpenMP directive is optional
whitespace, followed by '\n' or comment '!'. */
match
gfc_match_omp_eos (void)
{
locus old_loc;
char c;
old_loc = gfc_current_locus;
gfc_gobble_whitespace ();
c = gfc_next_ascii_char ();
switch (c)
{
case '!':
do
c = gfc_next_ascii_char ();
while (c != '\n');
/* Fall through */
case '\n':
return MATCH_YES;
}
gfc_current_locus = old_loc;
return MATCH_NO;
}
/* Free an omp_clauses structure. */
void
gfc_free_omp_clauses (gfc_omp_clauses *c)
{
int i;
if (c == NULL)
return;
gfc_free_expr (c->if_expr);
gfc_free_expr (c->num_threads);
gfc_free_expr (c->chunk_size);
for (i = 0; i < OMP_LIST_NUM; i++)
gfc_free_namelist (c->lists[i]);
gfc_free (c);
}
/* Match a variable/common block list and construct a namelist from it. */
static match
gfc_match_omp_variable_list (const char *str, gfc_namelist **list,
bool allow_common)
{
gfc_namelist *head, *tail, *p;
locus old_loc;
char n[GFC_MAX_SYMBOL_LEN+1];
gfc_symbol *sym;
match m;
gfc_symtree *st;
head = tail = NULL;
old_loc = gfc_current_locus;
m = gfc_match (str);
if (m != MATCH_YES)
return m;
for (;;)
{
m = gfc_match_symbol (&sym, 1);
switch (m)
{
case MATCH_YES:
gfc_set_sym_referenced (sym);
p = gfc_get_namelist ();
if (head == NULL)
head = tail = p;
else
{
tail->next = p;
tail = tail->next;
}
tail->sym = sym;
goto next_item;
case MATCH_NO:
break;
case MATCH_ERROR:
goto cleanup;
}
if (!allow_common)
goto syntax;
m = gfc_match (" / %n /", n);
if (m == MATCH_ERROR)
goto cleanup;
if (m == MATCH_NO)
goto syntax;
st = gfc_find_symtree (gfc_current_ns->common_root, n);
if (st == NULL)
{
gfc_error ("COMMON block /%s/ not found at %C", n);
goto cleanup;
}
for (sym = st->n.common->head; sym; sym = sym->common_next)
{
gfc_set_sym_referenced (sym);
p = gfc_get_namelist ();
if (head == NULL)
head = tail = p;
else
{
tail->next = p;
tail = tail->next;
}
tail->sym = sym;
}
next_item:
if (gfc_match_char (')') == MATCH_YES)
break;
if (gfc_match_char (',') != MATCH_YES)
goto syntax;
}
while (*list)
list = &(*list)->next;
*list = head;
return MATCH_YES;
syntax:
gfc_error ("Syntax error in OpenMP variable list at %C");
cleanup:
gfc_free_namelist (head);
gfc_current_locus = old_loc;
return MATCH_ERROR;
}
#define OMP_CLAUSE_PRIVATE (1 << 0)
#define OMP_CLAUSE_FIRSTPRIVATE (1 << 1)
#define OMP_CLAUSE_LASTPRIVATE (1 << 2)
#define OMP_CLAUSE_COPYPRIVATE (1 << 3)
#define OMP_CLAUSE_SHARED (1 << 4)
#define OMP_CLAUSE_COPYIN (1 << 5)
#define OMP_CLAUSE_REDUCTION (1 << 6)
#define OMP_CLAUSE_IF (1 << 7)
#define OMP_CLAUSE_NUM_THREADS (1 << 8)
#define OMP_CLAUSE_SCHEDULE (1 << 9)
#define OMP_CLAUSE_DEFAULT (1 << 10)
#define OMP_CLAUSE_ORDERED (1 << 11)
#define OMP_CLAUSE_COLLAPSE (1 << 12)
#define OMP_CLAUSE_UNTIED (1 << 13)
/* Match OpenMP directive clauses. MASK is a bitmask of
clauses that are allowed for a particular directive. */
static match
gfc_match_omp_clauses (gfc_omp_clauses **cp, int mask)
{
gfc_omp_clauses *c = gfc_get_omp_clauses ();
locus old_loc;
bool needs_space = true, first = true;
*cp = NULL;
while (1)
{
if ((first || gfc_match_char (',') != MATCH_YES)
&& (needs_space && gfc_match_space () != MATCH_YES))
break;
needs_space = false;
first = false;
gfc_gobble_whitespace ();
if ((mask & OMP_CLAUSE_IF) && c->if_expr == NULL
&& gfc_match ("if ( %e )", &c->if_expr) == MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_NUM_THREADS) && c->num_threads == NULL
&& gfc_match ("num_threads ( %e )", &c->num_threads) == MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_PRIVATE)
&& gfc_match_omp_variable_list ("private (",
&c->lists[OMP_LIST_PRIVATE], true)
== MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_FIRSTPRIVATE)
&& gfc_match_omp_variable_list ("firstprivate (",
&c->lists[OMP_LIST_FIRSTPRIVATE],
true)
== MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_LASTPRIVATE)
&& gfc_match_omp_variable_list ("lastprivate (",
&c->lists[OMP_LIST_LASTPRIVATE],
true)
== MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_COPYPRIVATE)
&& gfc_match_omp_variable_list ("copyprivate (",
&c->lists[OMP_LIST_COPYPRIVATE],
true)
== MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_SHARED)
&& gfc_match_omp_variable_list ("shared (",
&c->lists[OMP_LIST_SHARED], true)
== MATCH_YES)
continue;
if ((mask & OMP_CLAUSE_COPYIN)
&& gfc_match_omp_variable_list ("copyin (",
&c->lists[OMP_LIST_COPYIN], true)
== MATCH_YES)
continue;
old_loc = gfc_current_locus;
if ((mask & OMP_CLAUSE_REDUCTION)
&& gfc_match ("reduction ( ") == MATCH_YES)
{
int reduction = OMP_LIST_NUM;
char buffer[GFC_MAX_SYMBOL_LEN + 1];
if (gfc_match_char ('+') == MATCH_YES)
reduction = OMP_LIST_PLUS;
else if (gfc_match_char ('*') == MATCH_YES)
reduction = OMP_LIST_MULT;
else if (gfc_match_char ('-') == MATCH_YES)
reduction = OMP_LIST_SUB;
else if (gfc_match (".and.") == MATCH_YES)
reduction = OMP_LIST_AND;
else if (gfc_match (".or.") == MATCH_YES)
reduction = OMP_LIST_OR;
else if (gfc_match (".eqv.") == MATCH_YES)
reduction = OMP_LIST_EQV;
else if (gfc_match (".neqv.") == MATCH_YES)
reduction = OMP_LIST_NEQV;
else if (gfc_match_name (buffer) == MATCH_YES)
{
gfc_symbol *sym;
const char *n = buffer;
gfc_find_symbol (buffer, NULL, 1, &sym);
if (sym != NULL)
{
if (sym->attr.intrinsic)
n = sym->name;
else if ((sym->attr.flavor != FL_UNKNOWN
&& sym->attr.flavor != FL_PROCEDURE)
|| sym->attr.external
|| sym->attr.generic
|| sym->attr.entry
|| sym->attr.result
|| sym->attr.dummy
|| sym->attr.subroutine
|| sym->attr.pointer
|| sym->attr.target
|| sym->attr.cray_pointer
|| sym->attr.cray_pointee
|| (sym->attr.proc != PROC_UNKNOWN
&& sym->attr.proc != PROC_INTRINSIC)
|| sym->attr.if_source != IFSRC_UNKNOWN
|| sym == sym->ns->proc_name)
{
gfc_error_now ("%s is not INTRINSIC procedure name "
"at %C", buffer);
sym = NULL;
}
else
n = sym->name;
}
if (strcmp (n, "max") == 0)
reduction = OMP_LIST_MAX;
else if (strcmp (n, "min") == 0)
reduction = OMP_LIST_MIN;
else if (strcmp (n, "iand") == 0)
reduction = OMP_LIST_IAND;
else if (strcmp (n, "ior") == 0)
reduction = OMP_LIST_IOR;
else if (strcmp (n, "ieor") == 0)
reduction = OMP_LIST_IEOR;
if (reduction != OMP_LIST_NUM
&& sym != NULL
&& ! sym->attr.intrinsic
&& ! sym->attr.use_assoc
&& ((sym->attr.flavor == FL_UNKNOWN
&& gfc_add_flavor (&sym->attr, FL_PROCEDURE,
sym->name, NULL) == FAILURE)
|| gfc_add_intrinsic (&sym->attr, NULL) == FAILURE))
{
gfc_free_omp_clauses (c);
return MATCH_ERROR;
}
}
if (reduction != OMP_LIST_NUM
&& gfc_match_omp_variable_list (" :", &c->lists[reduction],
false)
== MATCH_YES)
continue;
else
gfc_current_locus = old_loc;
}
if ((mask & OMP_CLAUSE_DEFAULT)
&& c->default_sharing == OMP_DEFAULT_UNKNOWN)
{
if (gfc_match ("default ( shared )") == MATCH_YES)
c->default_sharing = OMP_DEFAULT_SHARED;
else if (gfc_match ("default ( private )") == MATCH_YES)
c->default_sharing = OMP_DEFAULT_PRIVATE;
else if (gfc_match ("default ( none )") == MATCH_YES)
c->default_sharing = OMP_DEFAULT_NONE;
else if (gfc_match ("default ( firstprivate )") == MATCH_YES)
c->default_sharing = OMP_DEFAULT_FIRSTPRIVATE;
if (c->default_sharing != OMP_DEFAULT_UNKNOWN)
continue;
}
old_loc = gfc_current_locus;
if ((mask & OMP_CLAUSE_SCHEDULE)
&& c->sched_kind == OMP_SCHED_NONE
&& gfc_match ("schedule ( ") == MATCH_YES)
{
if (gfc_match ("static") == MATCH_YES)
c->sched_kind = OMP_SCHED_STATIC;
else if (gfc_match ("dynamic") == MATCH_YES)
c->sched_kind = OMP_SCHED_DYNAMIC;
else if (gfc_match ("guided") == MATCH_YES)
c->sched_kind = OMP_SCHED_GUIDED;
else if (gfc_match ("runtime") == MATCH_YES)
c->sched_kind = OMP_SCHED_RUNTIME;
else if (gfc_match ("auto") == MATCH_YES)
c->sched_kind = OMP_SCHED_AUTO;
if (c->sched_kind != OMP_SCHED_NONE)
{
match m = MATCH_NO;
if (c->sched_kind != OMP_SCHED_RUNTIME
&& c->sched_kind != OMP_SCHED_AUTO)
m = gfc_match (" , %e )", &c->chunk_size);
if (m != MATCH_YES)
m = gfc_match_char (')');
if (m != MATCH_YES)
c->sched_kind = OMP_SCHED_NONE;
}
if (c->sched_kind != OMP_SCHED_NONE)
continue;
else
gfc_current_locus = old_loc;
}
if ((mask & OMP_CLAUSE_ORDERED) && !c->ordered
&& gfc_match ("ordered") == MATCH_YES)
{
c->ordered = needs_space = true;
continue;
}
if ((mask & OMP_CLAUSE_UNTIED) && !c->untied
&& gfc_match ("untied") == MATCH_YES)
{
c->untied = needs_space = true;
continue;
}
if ((mask & OMP_CLAUSE_COLLAPSE) && !c->collapse)
{
gfc_expr *cexpr = NULL;
match m = gfc_match ("collapse ( %e )", &cexpr);
if (m == MATCH_YES)
{
int collapse;
const char *p = gfc_extract_int (cexpr, &collapse);
if (p)
{
gfc_error_now (p);
collapse = 1;
}
else if (collapse <= 0)
{
gfc_error_now ("COLLAPSE clause argument not"
" constant positive integer at %C");
collapse = 1;
}
c->collapse = collapse;
gfc_free_expr (cexpr);
continue;
}
}
break;
}
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_free_omp_clauses (c);
return MATCH_ERROR;
}
*cp = c;
return MATCH_YES;
}
#define OMP_PARALLEL_CLAUSES \
(OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE | OMP_CLAUSE_SHARED \
| OMP_CLAUSE_COPYIN | OMP_CLAUSE_REDUCTION | OMP_CLAUSE_IF \
| OMP_CLAUSE_NUM_THREADS | OMP_CLAUSE_DEFAULT)
#define OMP_DO_CLAUSES \
(OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE \
| OMP_CLAUSE_LASTPRIVATE | OMP_CLAUSE_REDUCTION \
| OMP_CLAUSE_SCHEDULE | OMP_CLAUSE_ORDERED | OMP_CLAUSE_COLLAPSE)
#define OMP_SECTIONS_CLAUSES \
(OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE \
| OMP_CLAUSE_LASTPRIVATE | OMP_CLAUSE_REDUCTION)
#define OMP_TASK_CLAUSES \
(OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE | OMP_CLAUSE_SHARED \
| OMP_CLAUSE_IF | OMP_CLAUSE_DEFAULT | OMP_CLAUSE_UNTIED)
match
gfc_match_omp_parallel (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES) != MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_PARALLEL;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_task (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_TASK_CLAUSES) != MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_TASK;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_taskwait (void)
{
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after TASKWAIT clause at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_TASKWAIT;
new_st.ext.omp_clauses = NULL;
return MATCH_YES;
}
match
gfc_match_omp_critical (void)
{
char n[GFC_MAX_SYMBOL_LEN+1];
if (gfc_match (" ( %n )", n) != MATCH_YES)
n[0] = '\0';
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP CRITICAL statement at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_CRITICAL;
new_st.ext.omp_name = n[0] ? xstrdup (n) : NULL;
return MATCH_YES;
}
match
gfc_match_omp_do (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_DO_CLAUSES) != MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_DO;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_flush (void)
{
gfc_namelist *list = NULL;
gfc_match_omp_variable_list (" (", &list, true);
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP FLUSH statement at %C");
gfc_free_namelist (list);
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_FLUSH;
new_st.ext.omp_namelist = list;
return MATCH_YES;
}
match
gfc_match_omp_threadprivate (void)
{
locus old_loc;
char n[GFC_MAX_SYMBOL_LEN+1];
gfc_symbol *sym;
match m;
gfc_symtree *st;
old_loc = gfc_current_locus;
m = gfc_match (" (");
if (m != MATCH_YES)
return m;
for (;;)
{
m = gfc_match_symbol (&sym, 0);
switch (m)
{
case MATCH_YES:
if (sym->attr.in_common)
gfc_error_now ("Threadprivate variable at %C is an element of "
"a COMMON block");
else if (gfc_add_threadprivate (&sym->attr, sym->name,
&sym->declared_at) == FAILURE)
goto cleanup;
goto next_item;
case MATCH_NO:
break;
case MATCH_ERROR:
goto cleanup;
}
m = gfc_match (" / %n /", n);
if (m == MATCH_ERROR)
goto cleanup;
if (m == MATCH_NO || n[0] == '\0')
goto syntax;
st = gfc_find_symtree (gfc_current_ns->common_root, n);
if (st == NULL)
{
gfc_error ("COMMON block /%s/ not found at %C", n);
goto cleanup;
}
st->n.common->threadprivate = 1;
for (sym = st->n.common->head; sym; sym = sym->common_next)
if (gfc_add_threadprivate (&sym->attr, sym->name,
&sym->declared_at) == FAILURE)
goto cleanup;
next_item:
if (gfc_match_char (')') == MATCH_YES)
break;
if (gfc_match_char (',') != MATCH_YES)
goto syntax;
}
return MATCH_YES;
syntax:
gfc_error ("Syntax error in !$OMP THREADPRIVATE list at %C");
cleanup:
gfc_current_locus = old_loc;
return MATCH_ERROR;
}
match
gfc_match_omp_parallel_do (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES | OMP_DO_CLAUSES)
!= MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_PARALLEL_DO;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_parallel_sections (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES | OMP_SECTIONS_CLAUSES)
!= MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_PARALLEL_SECTIONS;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_parallel_workshare (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_PARALLEL_CLAUSES) != MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_PARALLEL_WORKSHARE;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_sections (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_SECTIONS_CLAUSES) != MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_SECTIONS;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_single (void)
{
gfc_omp_clauses *c;
if (gfc_match_omp_clauses (&c, OMP_CLAUSE_PRIVATE | OMP_CLAUSE_FIRSTPRIVATE)
!= MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_SINGLE;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
match
gfc_match_omp_workshare (void)
{
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP WORKSHARE statement at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_WORKSHARE;
new_st.ext.omp_clauses = gfc_get_omp_clauses ();
return MATCH_YES;
}
match
gfc_match_omp_master (void)
{
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP MASTER statement at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_MASTER;
new_st.ext.omp_clauses = NULL;
return MATCH_YES;
}
match
gfc_match_omp_ordered (void)
{
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP ORDERED statement at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_ORDERED;
new_st.ext.omp_clauses = NULL;
return MATCH_YES;
}
match
gfc_match_omp_atomic (void)
{
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP ATOMIC statement at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_ATOMIC;
new_st.ext.omp_clauses = NULL;
return MATCH_YES;
}
match
gfc_match_omp_barrier (void)
{
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after $OMP BARRIER statement at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_BARRIER;
new_st.ext.omp_clauses = NULL;
return MATCH_YES;
}
match
gfc_match_omp_end_nowait (void)
{
bool nowait = false;
if (gfc_match ("% nowait") == MATCH_YES)
nowait = true;
if (gfc_match_omp_eos () != MATCH_YES)
{
gfc_error ("Unexpected junk after NOWAIT clause at %C");
return MATCH_ERROR;
}
new_st.op = EXEC_OMP_END_NOWAIT;
new_st.ext.omp_bool = nowait;
return MATCH_YES;
}
match
gfc_match_omp_end_single (void)
{
gfc_omp_clauses *c;
if (gfc_match ("% nowait") == MATCH_YES)
{
new_st.op = EXEC_OMP_END_NOWAIT;
new_st.ext.omp_bool = true;
return MATCH_YES;
}
if (gfc_match_omp_clauses (&c, OMP_CLAUSE_COPYPRIVATE) != MATCH_YES)
return MATCH_ERROR;
new_st.op = EXEC_OMP_END_SINGLE;
new_st.ext.omp_clauses = c;
return MATCH_YES;
}
/* OpenMP directive resolving routines. */
static void
resolve_omp_clauses (gfc_code *code)
{
gfc_omp_clauses *omp_clauses = code->ext.omp_clauses;
gfc_namelist *n;
int list;
static const char *clause_names[]
= { "PRIVATE", "FIRSTPRIVATE", "LASTPRIVATE", "COPYPRIVATE", "SHARED",
"COPYIN", "REDUCTION" };
if (omp_clauses == NULL)
return;
if (omp_clauses->if_expr)
{
gfc_expr *expr = omp_clauses->if_expr;
if (gfc_resolve_expr (expr) == FAILURE
|| expr->ts.type != BT_LOGICAL || expr->rank != 0)
gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
&expr->where);
}
if (omp_clauses->num_threads)
{
gfc_expr *expr = omp_clauses->num_threads;
if (gfc_resolve_expr (expr) == FAILURE
|| expr->ts.type != BT_INTEGER || expr->rank != 0)
gfc_error ("NUM_THREADS clause at %L requires a scalar "
"INTEGER expression", &expr->where);
}
if (omp_clauses->chunk_size)
{
gfc_expr *expr = omp_clauses->chunk_size;
if (gfc_resolve_expr (expr) == FAILURE
|| expr->ts.type != BT_INTEGER || expr->rank != 0)
gfc_error ("SCHEDULE clause's chunk_size at %L requires "
"a scalar INTEGER expression", &expr->where);
}
/* Check that no symbol appears on multiple clauses, except that
a symbol can appear on both firstprivate and lastprivate. */
for (list = 0; list < OMP_LIST_NUM; list++)
for (n = omp_clauses->lists[list]; n; n = n->next)
{
n->sym->mark = 0;
if (n->sym->attr.flavor == FL_VARIABLE)
continue;
if (n->sym->attr.flavor == FL_PROCEDURE
&& n->sym->result == n->sym
&& n->sym->attr.function)
{
if (gfc_current_ns->proc_name == n->sym
|| (gfc_current_ns->parent
&& gfc_current_ns->parent->proc_name == n->sym))
continue;
if (gfc_current_ns->proc_name->attr.entry_master)
{
gfc_entry_list *el = gfc_current_ns->entries;
for (; el; el = el->next)
if (el->sym == n->sym)
break;
if (el)
continue;
}
if (gfc_current_ns->parent
&& gfc_current_ns->parent->proc_name->attr.entry_master)
{
gfc_entry_list *el = gfc_current_ns->parent->entries;
for (; el; el = el->next)
if (el->sym == n->sym)
break;
if (el)
continue;
}
if (n->sym->attr.proc_pointer)
continue;
}
gfc_error ("Object '%s' is not a variable at %L", n->sym->name,
&code->loc);
}
for (list = 0; list < OMP_LIST_NUM; list++)
if (list != OMP_LIST_FIRSTPRIVATE && list != OMP_LIST_LASTPRIVATE)
for (n = omp_clauses->lists[list]; n; n = n->next)
if (n->sym->mark)
gfc_error ("Symbol '%s' present on multiple clauses at %L",
n->sym->name, &code->loc);
else
n->sym->mark = 1;
gcc_assert (OMP_LIST_LASTPRIVATE == OMP_LIST_FIRSTPRIVATE + 1);
for (list = OMP_LIST_FIRSTPRIVATE; list <= OMP_LIST_LASTPRIVATE; list++)
for (n = omp_clauses->lists[list]; n; n = n->next)
if (n->sym->mark)
{
gfc_error ("Symbol '%s' present on multiple clauses at %L",
n->sym->name, &code->loc);
n->sym->mark = 0;
}
for (n = omp_clauses->lists[OMP_LIST_FIRSTPRIVATE]; n; n = n->next)
if (n->sym->mark)
gfc_error ("Symbol '%s' present on multiple clauses at %L",
n->sym->name, &code->loc);
else
n->sym->mark = 1;
for (n = omp_clauses->lists[OMP_LIST_LASTPRIVATE]; n; n = n->next)
n->sym->mark = 0;
for (n = omp_clauses->lists[OMP_LIST_LASTPRIVATE]; n; n = n->next)
if (n->sym->mark)
gfc_error ("Symbol '%s' present on multiple clauses at %L",
n->sym->name, &code->loc);
else
n->sym->mark = 1;
for (list = 0; list < OMP_LIST_NUM; list++)
if ((n = omp_clauses->lists[list]) != NULL)
{
const char *name;
if (list < OMP_LIST_REDUCTION_FIRST)
name = clause_names[list];
else if (list <= OMP_LIST_REDUCTION_LAST)
name = clause_names[OMP_LIST_REDUCTION_FIRST];
else
gcc_unreachable ();
switch (list)
{
case OMP_LIST_COPYIN:
for (; n != NULL; n = n->next)
{
if (!n->sym->attr.threadprivate)
gfc_error ("Non-THREADPRIVATE object '%s' in COPYIN clause"
" at %L", n->sym->name, &code->loc);
if (n->sym->ts.type == BT_DERIVED && n->sym->ts.u.derived->attr.alloc_comp)
gfc_error ("COPYIN clause object '%s' at %L has ALLOCATABLE components",
n->sym->name, &code->loc);
}
break;
case OMP_LIST_COPYPRIVATE:
for (; n != NULL; n = n->next)
{
if (n->sym->as && n->sym->as->type == AS_ASSUMED_SIZE)
gfc_error ("Assumed size array '%s' in COPYPRIVATE clause "
"at %L", n->sym->name, &code->loc);
if (n->sym->ts.type == BT_DERIVED && n->sym->ts.u.derived->attr.alloc_comp)
gfc_error ("COPYPRIVATE clause object '%s' at %L has ALLOCATABLE components",
n->sym->name, &code->loc);
}
break;
case OMP_LIST_SHARED:
for (; n != NULL; n = n->next)
{
if (n->sym->attr.threadprivate)
gfc_error ("THREADPRIVATE object '%s' in SHARED clause at "
"%L", n->sym->name, &code->loc);
if (n->sym->attr.cray_pointee)
gfc_error ("Cray pointee '%s' in SHARED clause at %L",
n->sym->name, &code->loc);
}
break;
default:
for (; n != NULL; n = n->next)
{
if (n->sym->attr.threadprivate)
gfc_error ("THREADPRIVATE object '%s' in %s clause at %L",
n->sym->name, name, &code->loc);
if (n->sym->attr.cray_pointee)
gfc_error ("Cray pointee '%s' in %s clause at %L",
n->sym->name, name, &code->loc);
if (list != OMP_LIST_PRIVATE)
{
if (n->sym->attr.pointer)
gfc_error ("POINTER object '%s' in %s clause at %L",
n->sym->name, name, &code->loc);
/* Variables in REDUCTION-clauses must be of intrinsic type (flagged below). */
if ((list < OMP_LIST_REDUCTION_FIRST || list > OMP_LIST_REDUCTION_LAST) &&
n->sym->ts.type == BT_DERIVED && n->sym->ts.u.derived->attr.alloc_comp)
gfc_error ("%s clause object '%s' has ALLOCATABLE components at %L",
name, n->sym->name, &code->loc);
if (n->sym->attr.cray_pointer)
gfc_error ("Cray pointer '%s' in %s clause at %L",
n->sym->name, name, &code->loc);
}
if (n->sym->as && n->sym->as->type == AS_ASSUMED_SIZE)
gfc_error ("Assumed size array '%s' in %s clause at %L",
n->sym->name, name, &code->loc);
if (n->sym->attr.in_namelist
&& (list < OMP_LIST_REDUCTION_FIRST
|| list > OMP_LIST_REDUCTION_LAST))
gfc_error ("Variable '%s' in %s clause is used in "
"NAMELIST statement at %L",
n->sym->name, name, &code->loc);
switch (list)
{
case OMP_LIST_PLUS:
case OMP_LIST_MULT:
case OMP_LIST_SUB:
if (!gfc_numeric_ts (&n->sym->ts))
gfc_error ("%c REDUCTION variable '%s' at %L must be of numeric type, got %s",
list == OMP_LIST_PLUS ? '+'
: list == OMP_LIST_MULT ? '*' : '-',
n->sym->name, &code->loc,
gfc_typename (&n->sym->ts));
break;
case OMP_LIST_AND:
case OMP_LIST_OR:
case OMP_LIST_EQV:
case OMP_LIST_NEQV:
if (n->sym->ts.type != BT_LOGICAL)
gfc_error ("%s REDUCTION variable '%s' must be LOGICAL "
"at %L",
list == OMP_LIST_AND ? ".AND."
: list == OMP_LIST_OR ? ".OR."
: list == OMP_LIST_EQV ? ".EQV." : ".NEQV.",
n->sym->name, &code->loc);
break;
case OMP_LIST_MAX:
case OMP_LIST_MIN:
if (n->sym->ts.type != BT_INTEGER
&& n->sym->ts.type != BT_REAL)
gfc_error ("%s REDUCTION variable '%s' must be "
"INTEGER or REAL at %L",
list == OMP_LIST_MAX ? "MAX" : "MIN",
n->sym->name, &code->loc);
break;
case OMP_LIST_IAND:
case OMP_LIST_IOR:
case OMP_LIST_IEOR:
if (n->sym->ts.type != BT_INTEGER)
gfc_error ("%s REDUCTION variable '%s' must be INTEGER "
"at %L",
list == OMP_LIST_IAND ? "IAND"
: list == OMP_LIST_MULT ? "IOR" : "IEOR",
n->sym->name, &code->loc);
break;
/* Workaround for PR middle-end/26316, nothing really needs
to be done here for OMP_LIST_PRIVATE. */
case OMP_LIST_PRIVATE:
gcc_assert (code->op != EXEC_NOP);
default:
break;
}
}
break;
}
}
}
/* Return true if SYM is ever referenced in EXPR except in the SE node. */
static bool
expr_references_sym (gfc_expr *e, gfc_symbol *s, gfc_expr *se)
{
gfc_actual_arglist *arg;
if (e == NULL || e == se)
return false;
switch (e->expr_type)
{
case EXPR_CONSTANT:
case EXPR_NULL:
case EXPR_VARIABLE:
case EXPR_STRUCTURE:
case EXPR_ARRAY:
if (e->symtree != NULL
&& e->symtree->n.sym == s)
return true;
return false;
case EXPR_SUBSTRING:
if (e->ref != NULL
&& (expr_references_sym (e->ref->u.ss.start, s, se)
|| expr_references_sym (e->ref->u.ss.end, s, se)))
return true;
return false;
case EXPR_OP:
if (expr_references_sym (e->value.op.op2, s, se))
return true;
return expr_references_sym (e->value.op.op1, s, se);
case EXPR_FUNCTION:
for (arg = e->value.function.actual; arg; arg = arg->next)
if (expr_references_sym (arg->expr, s, se))
return true;
return false;
default:
gcc_unreachable ();
}
}
/* If EXPR is a conversion function that widens the type
if WIDENING is true or narrows the type if WIDENING is false,
return the inner expression, otherwise return NULL. */
static gfc_expr *
is_conversion (gfc_expr *expr, bool widening)
{
gfc_typespec *ts1, *ts2;
if (expr->expr_type != EXPR_FUNCTION
|| expr->value.function.isym == NULL
|| expr->value.function.esym != NULL
|| expr->value.function.isym->id != GFC_ISYM_CONVERSION)
return NULL;
if (widening)
{
ts1 = &expr->ts;
ts2 = &expr->value.function.actual->expr->ts;
}
else
{
ts1 = &expr->value.function.actual->expr->ts;
ts2 = &expr->ts;
}
if (ts1->type > ts2->type
|| (ts1->type == ts2->type && ts1->kind > ts2->kind))
return expr->value.function.actual->expr;
return NULL;
}
static void
resolve_omp_atomic (gfc_code *code)
{
gfc_symbol *var;
gfc_expr *expr2;
code = code->block->next;
gcc_assert (code->op == EXEC_ASSIGN);
gcc_assert (code->next == NULL);
if (code->expr1->expr_type != EXPR_VARIABLE
|| code->expr1->symtree == NULL
|| code->expr1->rank != 0
|| (code->expr1->ts.type != BT_INTEGER
&& code->expr1->ts.type != BT_REAL
&& code->expr1->ts.type != BT_COMPLEX
&& code->expr1->ts.type != BT_LOGICAL))
{
gfc_error ("!$OMP ATOMIC statement must set a scalar variable of "
"intrinsic type at %L", &code->loc);
return;
}
var = code->expr1->symtree->n.sym;
expr2 = is_conversion (code->expr2, false);
if (expr2 == NULL)
expr2 = code->expr2;
if (expr2->expr_type == EXPR_OP)
{
gfc_expr *v = NULL, *e, *c;
gfc_intrinsic_op op = expr2->value.op.op;
gfc_intrinsic_op alt_op = INTRINSIC_NONE;
switch (op)
{
case INTRINSIC_PLUS:
alt_op = INTRINSIC_MINUS;
break;
case INTRINSIC_TIMES:
alt_op = INTRINSIC_DIVIDE;
break;
case INTRINSIC_MINUS:
alt_op = INTRINSIC_PLUS;
break;
case INTRINSIC_DIVIDE:
alt_op = INTRINSIC_TIMES;
break;
case INTRINSIC_AND:
case INTRINSIC_OR:
break;
case INTRINSIC_EQV:
alt_op = INTRINSIC_NEQV;
break;
case INTRINSIC_NEQV:
alt_op = INTRINSIC_EQV;
break;
default:
gfc_error ("!$OMP ATOMIC assignment operator must be "
"+, *, -, /, .AND., .OR., .EQV. or .NEQV. at %L",
&expr2->where);
return;
}
/* Check for var = var op expr resp. var = expr op var where
expr doesn't reference var and var op expr is mathematically
equivalent to var op (expr) resp. expr op var equivalent to
(expr) op var. We rely here on the fact that the matcher
for x op1 y op2 z where op1 and op2 have equal precedence
returns (x op1 y) op2 z. */
e = expr2->value.op.op2;
if (e->expr_type == EXPR_VARIABLE
&& e->symtree != NULL
&& e->symtree->n.sym == var)
v = e;
else if ((c = is_conversion (e, true)) != NULL
&& c->expr_type == EXPR_VARIABLE
&& c->symtree != NULL
&& c->symtree->n.sym == var)
v = c;
else
{
gfc_expr **p = NULL, **q;
for (q = &expr2->value.op.op1; (e = *q) != NULL; )
if (e->expr_type == EXPR_VARIABLE
&& e->symtree != NULL
&& e->symtree->n.sym == var)
{
v = e;
break;
}
else if ((c = is_conversion (e, true)) != NULL)
q = &e->value.function.actual->expr;
else if (e->expr_type != EXPR_OP
|| (e->value.op.op != op
&& e->value.op.op != alt_op)
|| e->rank != 0)
break;
else
{
p = q;
q = &e->value.op.op1;
}
if (v == NULL)
{
gfc_error ("!$OMP ATOMIC assignment must be var = var op expr "
"or var = expr op var at %L", &expr2->where);
return;
}
if (p != NULL)
{
e = *p;
switch (e->value.op.op)
{
case INTRINSIC_MINUS:
case INTRINSIC_DIVIDE:
case INTRINSIC_EQV:
case INTRINSIC_NEQV:
gfc_error ("!$OMP ATOMIC var = var op expr not "
"mathematically equivalent to var = var op "
"(expr) at %L", &expr2->where);
break;
default:
break;
}
/* Canonicalize into var = var op (expr). */
*p = e->value.op.op2;
e->value.op.op2 = expr2;
e->ts = expr2->ts;
if (code->expr2 == expr2)
code->expr2 = expr2 = e;
else
code->expr2->value.function.actual->expr = expr2 = e;
if (!gfc_compare_types (&expr2->value.op.op1->ts, &expr2->ts))
{
for (p = &expr2->value.op.op1; *p != v;
p = &(*p)->value.function.actual->expr)
;
*p = NULL;
gfc_free_expr (expr2->value.op.op1);
expr2->value.op.op1 = v;
gfc_convert_type (v, &expr2->ts, 2);
}
}
}
if (e->rank != 0 || expr_references_sym (code->expr2, var, v))
{
gfc_error ("expr in !$OMP ATOMIC assignment var = var op expr "
"must be scalar and cannot reference var at %L",
&expr2->where);
return;
}
}
else if (expr2->expr_type == EXPR_FUNCTION
&& expr2->value.function.isym != NULL
&& expr2->value.function.esym == NULL
&& expr2->value.function.actual != NULL
&& expr2->value.function.actual->next != NULL)
{
gfc_actual_arglist *arg, *var_arg;
switch (expr2->value.function.isym->id)
{
case GFC_ISYM_MIN:
case GFC_ISYM_MAX:
break;
case GFC_ISYM_IAND:
case GFC_ISYM_IOR:
case GFC_ISYM_IEOR:
if (expr2->value.function.actual->next->next != NULL)
{
gfc_error ("!$OMP ATOMIC assignment intrinsic IAND, IOR "
"or IEOR must have two arguments at %L",
&expr2->where);
return;
}
break;
default:
gfc_error ("!$OMP ATOMIC assignment intrinsic must be "
"MIN, MAX, IAND, IOR or IEOR at %L",
&expr2->where);
return;
}
var_arg = NULL;
for (arg = expr2->value.function.actual; arg; arg = arg->next)
{
if ((arg == expr2->value.function.actual
|| (var_arg == NULL && arg->next == NULL))
&& arg->expr->expr_type == EXPR_VARIABLE
&& arg->expr->symtree != NULL
&& arg->expr->symtree->n.sym == var)
var_arg = arg;
else if (expr_references_sym (arg->expr, var, NULL))
gfc_error ("!$OMP ATOMIC intrinsic arguments except one must not "
"reference '%s' at %L", var->name, &arg->expr->where);
if (arg->expr->rank != 0)
gfc_error ("!$OMP ATOMIC intrinsic arguments must be scalar "
"at %L", &arg->expr->where);
}
if (var_arg == NULL)
{
gfc_error ("First or last !$OMP ATOMIC intrinsic argument must "
"be '%s' at %L", var->name, &expr2->where);
return;
}
if (var_arg != expr2->value.function.actual)
{
/* Canonicalize, so that var comes first. */
gcc_assert (var_arg->next == NULL);
for (arg = expr2->value.function.actual;
arg->next != var_arg; arg = arg->next)
;
var_arg->next = expr2->value.function.actual;
expr2->value.function.actual = var_arg;
arg->next = NULL;
}
}
else
gfc_error ("!$OMP ATOMIC assignment must have an operator or intrinsic "
"on right hand side at %L", &expr2->where);
}
struct omp_context
{
gfc_code *code;
struct pointer_set_t *sharing_clauses;
struct pointer_set_t *private_iterators;
struct omp_context *previous;
} *omp_current_ctx;
static gfc_code *omp_current_do_code;
static int omp_current_do_collapse;
void
gfc_resolve_omp_do_blocks (gfc_code *code, gfc_namespace *ns)
{
if (code->block->next && code->block->next->op == EXEC_DO)
{
int i;
gfc_code *c;
omp_current_do_code = code->block->next;
omp_current_do_collapse = code->ext.omp_clauses->collapse;
for (i = 1, c = omp_current_do_code; i < omp_current_do_collapse; i++)
{
c = c->block;
if (c->op != EXEC_DO || c->next == NULL)
break;
c = c->next;
if (c->op != EXEC_DO)
break;
}
if (i < omp_current_do_collapse || omp_current_do_collapse <= 0)
omp_current_do_collapse = 1;
}
gfc_resolve_blocks (code->block, ns);
omp_current_do_collapse = 0;
omp_current_do_code = NULL;
}
void
gfc_resolve_omp_parallel_blocks (gfc_code *code, gfc_namespace *ns)
{
struct omp_context ctx;
gfc_omp_clauses *omp_clauses = code->ext.omp_clauses;
gfc_namelist *n;
int list;
ctx.code = code;
ctx.sharing_clauses = pointer_set_create ();
ctx.private_iterators = pointer_set_create ();
ctx.previous = omp_current_ctx;
omp_current_ctx = &ctx;
for (list = 0; list < OMP_LIST_NUM; list++)
for (n = omp_clauses->lists[list]; n; n = n->next)
pointer_set_insert (ctx.sharing_clauses, n->sym);
if (code->op == EXEC_OMP_PARALLEL_DO)
gfc_resolve_omp_do_blocks (code, ns);
else
gfc_resolve_blocks (code->block, ns);
omp_current_ctx = ctx.previous;
pointer_set_destroy (ctx.sharing_clauses);
pointer_set_destroy (ctx.private_iterators);
}
/* Note a DO iterator variable. This is special in !$omp parallel
construct, where they are predetermined private. */
void
gfc_resolve_do_iterator (gfc_code *code, gfc_symbol *sym)
{
int i = omp_current_do_collapse;
gfc_code *c = omp_current_do_code;
if (sym->attr.threadprivate)
return;
/* !$omp do and !$omp parallel do iteration variable is predetermined
private just in the !$omp do resp. !$omp parallel do construct,
with no implications for the outer parallel constructs. */
while (i-- >= 1)
{
if (code == c)
return;
c = c->block->next;
}
if (omp_current_ctx == NULL)
return;
if (pointer_set_contains (omp_current_ctx->sharing_clauses, sym))
return;
if (! pointer_set_insert (omp_current_ctx->private_iterators, sym))
{
gfc_omp_clauses *omp_clauses = omp_current_ctx->code->ext.omp_clauses;
gfc_namelist *p;
p = gfc_get_namelist ();
p->sym = sym;
p->next = omp_clauses->lists[OMP_LIST_PRIVATE];
omp_clauses->lists[OMP_LIST_PRIVATE] = p;
}
}
static void
resolve_omp_do (gfc_code *code)
{
gfc_code *do_code, *c;
int list, i, collapse;
gfc_namelist *n;
gfc_symbol *dovar;
if (code->ext.omp_clauses)
resolve_omp_clauses (code);
do_code = code->block->next;
collapse = code->ext.omp_clauses->collapse;
if (collapse <= 0)
collapse = 1;
for (i = 1; i <= collapse; i++)
{
if (do_code->op == EXEC_DO_WHILE)
{
gfc_error ("!$OMP DO cannot be a DO WHILE or DO without loop control "
"at %L", &do_code->loc);
break;
}
gcc_assert (do_code->op == EXEC_DO);
if (do_code->ext.iterator->var->ts.type != BT_INTEGER)
gfc_error ("!$OMP DO iteration variable must be of type integer at %L",
&do_code->loc);
dovar = do_code->ext.iterator->var->symtree->n.sym;
if (dovar->attr.threadprivate)
gfc_error ("!$OMP DO iteration variable must not be THREADPRIVATE "
"at %L", &do_code->loc);
if (code->ext.omp_clauses)
for (list = 0; list < OMP_LIST_NUM; list++)
if (list != OMP_LIST_PRIVATE && list != OMP_LIST_LASTPRIVATE)
for (n = code->ext.omp_clauses->lists[list]; n; n = n->next)
if (dovar == n->sym)
{
gfc_error ("!$OMP DO iteration variable present on clause "
"other than PRIVATE or LASTPRIVATE at %L",
&do_code->loc);
break;
}
if (i > 1)
{
gfc_code *do_code2 = code->block->next;
int j;
for (j = 1; j < i; j++)
{
gfc_symbol *ivar = do_code2->ext.iterator->var->symtree->n.sym;
if (dovar == ivar
|| gfc_find_sym_in_expr (ivar, do_code->ext.iterator->start)
|| gfc_find_sym_in_expr (ivar, do_code->ext.iterator->end)
|| gfc_find_sym_in_expr (ivar, do_code->ext.iterator->step))
{
gfc_error ("!$OMP DO collapsed loops don't form rectangular iteration space at %L",
&do_code->loc);
break;
}
if (j < i)
break;
do_code2 = do_code2->block->next;
}
}
if (i == collapse)
break;
for (c = do_code->next; c; c = c->next)
if (c->op != EXEC_NOP && c->op != EXEC_CONTINUE)
{
gfc_error ("collapsed !$OMP DO loops not perfectly nested at %L",
&c->loc);
break;
}
if (c)
break;
do_code = do_code->block;
if (do_code->op != EXEC_DO && do_code->op != EXEC_DO_WHILE)
{
gfc_error ("not enough DO loops for collapsed !$OMP DO at %L",
&code->loc);
break;
}
do_code = do_code->next;
if (do_code->op != EXEC_DO && do_code->op != EXEC_DO_WHILE)
{
gfc_error ("not enough DO loops for collapsed !$OMP DO at %L",
&code->loc);
break;
}
}
}
/* Resolve OpenMP directive clauses and check various requirements
of each directive. */
void
gfc_resolve_omp_directive (gfc_code *code, gfc_namespace *ns ATTRIBUTE_UNUSED)
{
if (code->op != EXEC_OMP_ATOMIC)
gfc_maybe_initialize_eh ();
switch (code->op)
{
case EXEC_OMP_DO:
case EXEC_OMP_PARALLEL_DO:
resolve_omp_do (code);
break;
case EXEC_OMP_WORKSHARE:
case EXEC_OMP_PARALLEL_WORKSHARE:
case EXEC_OMP_PARALLEL:
case EXEC_OMP_PARALLEL_SECTIONS:
case EXEC_OMP_SECTIONS:
case EXEC_OMP_SINGLE:
if (code->ext.omp_clauses)
resolve_omp_clauses (code);
break;
case EXEC_OMP_ATOMIC:
resolve_omp_atomic (code);
break;
default:
break;
}
}
|