forked from riscvarchive/riscv-gcc
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathomp-general.c
2006 lines (1876 loc) · 55.3 KB
/
omp-general.c
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
/* General types and functions that are uselful for processing of OpenMP,
OpenACC and similar directivers at various stages of compilation.
Copyright (C) 2005-2020 Free Software Foundation, Inc.
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/>. */
/* Find an OMP clause of type KIND within CLAUSES. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "tree.h"
#include "gimple.h"
#include "ssa.h"
#include "diagnostic-core.h"
#include "fold-const.h"
#include "langhooks.h"
#include "omp-general.h"
#include "stringpool.h"
#include "attribs.h"
#include "gimplify.h"
#include "cgraph.h"
#include "alloc-pool.h"
#include "symbol-summary.h"
#include "hsa-common.h"
#include "tree-pass.h"
#include "omp-device-properties.h"
#include "tree-iterator.h"
enum omp_requires omp_requires_mask;
tree
omp_find_clause (tree clauses, enum omp_clause_code kind)
{
for (; clauses ; clauses = OMP_CLAUSE_CHAIN (clauses))
if (OMP_CLAUSE_CODE (clauses) == kind)
return clauses;
return NULL_TREE;
}
/* True if OpenMP should regard this DECL as being a scalar which has Fortran's
allocatable or pointer attribute. */
bool
omp_is_allocatable_or_ptr (tree decl)
{
return lang_hooks.decls.omp_is_allocatable_or_ptr (decl);
}
/* Check whether this DECL belongs to a Fortran optional argument.
With 'for_present_check' set to false, decls which are optional parameters
themselve are returned as tree - or a NULL_TREE otherwise. Those decls are
always pointers. With 'for_present_check' set to true, the decl for checking
whether an argument is present is returned; for arguments with value
attribute this is the hidden argument and of BOOLEAN_TYPE. If the decl is
unrelated to optional arguments, NULL_TREE is returned. */
tree
omp_check_optional_argument (tree decl, bool for_present_check)
{
return lang_hooks.decls.omp_check_optional_argument (decl, for_present_check);
}
/* Return true if DECL is a reference type. */
bool
omp_is_reference (tree decl)
{
return lang_hooks.decls.omp_privatize_by_reference (decl);
}
/* Adjust *COND_CODE and *N2 so that the former is either LT_EXPR or GT_EXPR,
given that V is the loop index variable and STEP is loop step. */
void
omp_adjust_for_condition (location_t loc, enum tree_code *cond_code, tree *n2,
tree v, tree step)
{
switch (*cond_code)
{
case LT_EXPR:
case GT_EXPR:
break;
case NE_EXPR:
gcc_assert (TREE_CODE (step) == INTEGER_CST);
if (TREE_CODE (TREE_TYPE (v)) == INTEGER_TYPE)
{
if (integer_onep (step))
*cond_code = LT_EXPR;
else
{
gcc_assert (integer_minus_onep (step));
*cond_code = GT_EXPR;
}
}
else
{
tree unit = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (v)));
gcc_assert (TREE_CODE (unit) == INTEGER_CST);
if (tree_int_cst_equal (unit, step))
*cond_code = LT_EXPR;
else
{
gcc_assert (wi::neg (wi::to_widest (unit))
== wi::to_widest (step));
*cond_code = GT_EXPR;
}
}
break;
case LE_EXPR:
if (POINTER_TYPE_P (TREE_TYPE (*n2)))
*n2 = fold_build_pointer_plus_hwi_loc (loc, *n2, 1);
else
*n2 = fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (*n2), *n2,
build_int_cst (TREE_TYPE (*n2), 1));
*cond_code = LT_EXPR;
break;
case GE_EXPR:
if (POINTER_TYPE_P (TREE_TYPE (*n2)))
*n2 = fold_build_pointer_plus_hwi_loc (loc, *n2, -1);
else
*n2 = fold_build2_loc (loc, MINUS_EXPR, TREE_TYPE (*n2), *n2,
build_int_cst (TREE_TYPE (*n2), 1));
*cond_code = GT_EXPR;
break;
default:
gcc_unreachable ();
}
}
/* Return the looping step from INCR, extracted from the step of a gimple omp
for statement. */
tree
omp_get_for_step_from_incr (location_t loc, tree incr)
{
tree step;
switch (TREE_CODE (incr))
{
case PLUS_EXPR:
step = TREE_OPERAND (incr, 1);
break;
case POINTER_PLUS_EXPR:
step = fold_convert (ssizetype, TREE_OPERAND (incr, 1));
break;
case MINUS_EXPR:
step = TREE_OPERAND (incr, 1);
step = fold_build1_loc (loc, NEGATE_EXPR, TREE_TYPE (step), step);
break;
default:
gcc_unreachable ();
}
return step;
}
/* Extract the header elements of parallel loop FOR_STMT and store
them into *FD. */
void
omp_extract_for_data (gomp_for *for_stmt, struct omp_for_data *fd,
struct omp_for_data_loop *loops)
{
tree t, var, *collapse_iter, *collapse_count;
tree count = NULL_TREE, iter_type = long_integer_type_node;
struct omp_for_data_loop *loop;
int i;
struct omp_for_data_loop dummy_loop;
location_t loc = gimple_location (for_stmt);
bool simd = gimple_omp_for_kind (for_stmt) == GF_OMP_FOR_KIND_SIMD;
bool distribute = gimple_omp_for_kind (for_stmt)
== GF_OMP_FOR_KIND_DISTRIBUTE;
bool taskloop = gimple_omp_for_kind (for_stmt)
== GF_OMP_FOR_KIND_TASKLOOP;
tree iterv, countv;
fd->for_stmt = for_stmt;
fd->pre = NULL;
fd->have_nowait = distribute || simd;
fd->have_ordered = false;
fd->have_reductemp = false;
fd->have_pointer_condtemp = false;
fd->have_scantemp = false;
fd->have_nonctrl_scantemp = false;
fd->lastprivate_conditional = 0;
fd->tiling = NULL_TREE;
fd->collapse = 1;
fd->ordered = 0;
fd->sched_kind = OMP_CLAUSE_SCHEDULE_STATIC;
fd->sched_modifiers = 0;
fd->chunk_size = NULL_TREE;
fd->simd_schedule = false;
collapse_iter = NULL;
collapse_count = NULL;
for (t = gimple_omp_for_clauses (for_stmt); t ; t = OMP_CLAUSE_CHAIN (t))
switch (OMP_CLAUSE_CODE (t))
{
case OMP_CLAUSE_NOWAIT:
fd->have_nowait = true;
break;
case OMP_CLAUSE_ORDERED:
fd->have_ordered = true;
if (OMP_CLAUSE_ORDERED_EXPR (t))
fd->ordered = tree_to_shwi (OMP_CLAUSE_ORDERED_EXPR (t));
break;
case OMP_CLAUSE_SCHEDULE:
gcc_assert (!distribute && !taskloop);
fd->sched_kind
= (enum omp_clause_schedule_kind)
(OMP_CLAUSE_SCHEDULE_KIND (t) & OMP_CLAUSE_SCHEDULE_MASK);
fd->sched_modifiers = (OMP_CLAUSE_SCHEDULE_KIND (t)
& ~OMP_CLAUSE_SCHEDULE_MASK);
fd->chunk_size = OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (t);
fd->simd_schedule = OMP_CLAUSE_SCHEDULE_SIMD (t);
break;
case OMP_CLAUSE_DIST_SCHEDULE:
gcc_assert (distribute);
fd->chunk_size = OMP_CLAUSE_DIST_SCHEDULE_CHUNK_EXPR (t);
break;
case OMP_CLAUSE_COLLAPSE:
fd->collapse = tree_to_shwi (OMP_CLAUSE_COLLAPSE_EXPR (t));
if (fd->collapse > 1)
{
collapse_iter = &OMP_CLAUSE_COLLAPSE_ITERVAR (t);
collapse_count = &OMP_CLAUSE_COLLAPSE_COUNT (t);
}
break;
case OMP_CLAUSE_TILE:
fd->tiling = OMP_CLAUSE_TILE_LIST (t);
fd->collapse = list_length (fd->tiling);
gcc_assert (fd->collapse);
collapse_iter = &OMP_CLAUSE_TILE_ITERVAR (t);
collapse_count = &OMP_CLAUSE_TILE_COUNT (t);
break;
case OMP_CLAUSE__REDUCTEMP_:
fd->have_reductemp = true;
break;
case OMP_CLAUSE_LASTPRIVATE:
if (OMP_CLAUSE_LASTPRIVATE_CONDITIONAL (t))
fd->lastprivate_conditional++;
break;
case OMP_CLAUSE__CONDTEMP_:
if (POINTER_TYPE_P (TREE_TYPE (OMP_CLAUSE_DECL (t))))
fd->have_pointer_condtemp = true;
break;
case OMP_CLAUSE__SCANTEMP_:
fd->have_scantemp = true;
if (!OMP_CLAUSE__SCANTEMP__ALLOC (t)
&& !OMP_CLAUSE__SCANTEMP__CONTROL (t))
fd->have_nonctrl_scantemp = true;
break;
default:
break;
}
if (fd->collapse > 1 || fd->tiling)
fd->loops = loops;
else
fd->loops = &fd->loop;
if (fd->ordered && fd->collapse == 1 && loops != NULL)
{
fd->loops = loops;
iterv = NULL_TREE;
countv = NULL_TREE;
collapse_iter = &iterv;
collapse_count = &countv;
}
/* FIXME: for now map schedule(auto) to schedule(static).
There should be analysis to determine whether all iterations
are approximately the same amount of work (then schedule(static)
is best) or if it varies (then schedule(dynamic,N) is better). */
if (fd->sched_kind == OMP_CLAUSE_SCHEDULE_AUTO)
{
fd->sched_kind = OMP_CLAUSE_SCHEDULE_STATIC;
gcc_assert (fd->chunk_size == NULL);
}
gcc_assert ((fd->collapse == 1 && !fd->tiling) || collapse_iter != NULL);
if (taskloop)
fd->sched_kind = OMP_CLAUSE_SCHEDULE_RUNTIME;
if (fd->sched_kind == OMP_CLAUSE_SCHEDULE_RUNTIME)
gcc_assert (fd->chunk_size == NULL);
else if (fd->chunk_size == NULL)
{
/* We only need to compute a default chunk size for ordered
static loops and dynamic loops. */
if (fd->sched_kind != OMP_CLAUSE_SCHEDULE_STATIC
|| fd->have_ordered)
fd->chunk_size = (fd->sched_kind == OMP_CLAUSE_SCHEDULE_STATIC)
? integer_zero_node : integer_one_node;
}
int cnt = fd->ordered ? fd->ordered : fd->collapse;
for (i = 0; i < cnt; i++)
{
if (i == 0
&& fd->collapse == 1
&& !fd->tiling
&& (fd->ordered == 0 || loops == NULL))
loop = &fd->loop;
else if (loops != NULL)
loop = loops + i;
else
loop = &dummy_loop;
loop->v = gimple_omp_for_index (for_stmt, i);
gcc_assert (SSA_VAR_P (loop->v));
gcc_assert (TREE_CODE (TREE_TYPE (loop->v)) == INTEGER_TYPE
|| TREE_CODE (TREE_TYPE (loop->v)) == POINTER_TYPE);
var = TREE_CODE (loop->v) == SSA_NAME ? SSA_NAME_VAR (loop->v) : loop->v;
loop->n1 = gimple_omp_for_initial (for_stmt, i);
loop->cond_code = gimple_omp_for_cond (for_stmt, i);
loop->n2 = gimple_omp_for_final (for_stmt, i);
gcc_assert (loop->cond_code != NE_EXPR
|| (gimple_omp_for_kind (for_stmt)
!= GF_OMP_FOR_KIND_OACC_LOOP));
t = gimple_omp_for_incr (for_stmt, i);
gcc_assert (TREE_OPERAND (t, 0) == var);
loop->step = omp_get_for_step_from_incr (loc, t);
omp_adjust_for_condition (loc, &loop->cond_code, &loop->n2, loop->v,
loop->step);
if (simd
|| (fd->sched_kind == OMP_CLAUSE_SCHEDULE_STATIC
&& !fd->have_ordered))
{
if (fd->collapse == 1 && !fd->tiling)
iter_type = TREE_TYPE (loop->v);
else if (i == 0
|| TYPE_PRECISION (iter_type)
< TYPE_PRECISION (TREE_TYPE (loop->v)))
iter_type
= build_nonstandard_integer_type
(TYPE_PRECISION (TREE_TYPE (loop->v)), 1);
}
else if (iter_type != long_long_unsigned_type_node)
{
if (POINTER_TYPE_P (TREE_TYPE (loop->v)))
iter_type = long_long_unsigned_type_node;
else if (TYPE_UNSIGNED (TREE_TYPE (loop->v))
&& TYPE_PRECISION (TREE_TYPE (loop->v))
>= TYPE_PRECISION (iter_type))
{
tree n;
if (loop->cond_code == LT_EXPR)
n = fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (loop->v),
loop->n2, loop->step);
else
n = loop->n1;
if (TREE_CODE (n) != INTEGER_CST
|| tree_int_cst_lt (TYPE_MAX_VALUE (iter_type), n))
iter_type = long_long_unsigned_type_node;
}
else if (TYPE_PRECISION (TREE_TYPE (loop->v))
> TYPE_PRECISION (iter_type))
{
tree n1, n2;
if (loop->cond_code == LT_EXPR)
{
n1 = loop->n1;
n2 = fold_build2_loc (loc, PLUS_EXPR, TREE_TYPE (loop->v),
loop->n2, loop->step);
}
else
{
n1 = fold_build2_loc (loc, MINUS_EXPR, TREE_TYPE (loop->v),
loop->n2, loop->step);
n2 = loop->n1;
}
if (TREE_CODE (n1) != INTEGER_CST
|| TREE_CODE (n2) != INTEGER_CST
|| !tree_int_cst_lt (TYPE_MIN_VALUE (iter_type), n1)
|| !tree_int_cst_lt (n2, TYPE_MAX_VALUE (iter_type)))
iter_type = long_long_unsigned_type_node;
}
}
if (i >= fd->collapse)
continue;
if (collapse_count && *collapse_count == NULL)
{
t = fold_binary (loop->cond_code, boolean_type_node,
fold_convert (TREE_TYPE (loop->v), loop->n1),
fold_convert (TREE_TYPE (loop->v), loop->n2));
if (t && integer_zerop (t))
count = build_zero_cst (long_long_unsigned_type_node);
else if ((i == 0 || count != NULL_TREE)
&& TREE_CODE (TREE_TYPE (loop->v)) == INTEGER_TYPE
&& TREE_CONSTANT (loop->n1)
&& TREE_CONSTANT (loop->n2)
&& TREE_CODE (loop->step) == INTEGER_CST)
{
tree itype = TREE_TYPE (loop->v);
if (POINTER_TYPE_P (itype))
itype = signed_type_for (itype);
t = build_int_cst (itype, (loop->cond_code == LT_EXPR ? -1 : 1));
t = fold_build2_loc (loc, PLUS_EXPR, itype,
fold_convert_loc (loc, itype, loop->step),
t);
t = fold_build2_loc (loc, PLUS_EXPR, itype, t,
fold_convert_loc (loc, itype, loop->n2));
t = fold_build2_loc (loc, MINUS_EXPR, itype, t,
fold_convert_loc (loc, itype, loop->n1));
if (TYPE_UNSIGNED (itype) && loop->cond_code == GT_EXPR)
{
tree step = fold_convert_loc (loc, itype, loop->step);
t = fold_build2_loc (loc, TRUNC_DIV_EXPR, itype,
fold_build1_loc (loc, NEGATE_EXPR,
itype, t),
fold_build1_loc (loc, NEGATE_EXPR,
itype, step));
}
else
t = fold_build2_loc (loc, TRUNC_DIV_EXPR, itype, t,
fold_convert_loc (loc, itype,
loop->step));
t = fold_convert_loc (loc, long_long_unsigned_type_node, t);
if (count != NULL_TREE)
count = fold_build2_loc (loc, MULT_EXPR,
long_long_unsigned_type_node,
count, t);
else
count = t;
if (TREE_CODE (count) != INTEGER_CST)
count = NULL_TREE;
}
else if (count && !integer_zerop (count))
count = NULL_TREE;
}
}
if (count
&& !simd
&& (fd->sched_kind != OMP_CLAUSE_SCHEDULE_STATIC
|| fd->have_ordered))
{
if (!tree_int_cst_lt (count, TYPE_MAX_VALUE (long_integer_type_node)))
iter_type = long_long_unsigned_type_node;
else
iter_type = long_integer_type_node;
}
else if (collapse_iter && *collapse_iter != NULL)
iter_type = TREE_TYPE (*collapse_iter);
fd->iter_type = iter_type;
if (collapse_iter && *collapse_iter == NULL)
*collapse_iter = create_tmp_var (iter_type, ".iter");
if (collapse_count && *collapse_count == NULL)
{
if (count)
*collapse_count = fold_convert_loc (loc, iter_type, count);
else
*collapse_count = create_tmp_var (iter_type, ".count");
}
if (fd->collapse > 1 || fd->tiling || (fd->ordered && loops))
{
fd->loop.v = *collapse_iter;
fd->loop.n1 = build_int_cst (TREE_TYPE (fd->loop.v), 0);
fd->loop.n2 = *collapse_count;
fd->loop.step = build_int_cst (TREE_TYPE (fd->loop.v), 1);
fd->loop.cond_code = LT_EXPR;
}
else if (loops)
loops[0] = fd->loop;
}
/* Build a call to GOMP_barrier. */
gimple *
omp_build_barrier (tree lhs)
{
tree fndecl = builtin_decl_explicit (lhs ? BUILT_IN_GOMP_BARRIER_CANCEL
: BUILT_IN_GOMP_BARRIER);
gcall *g = gimple_build_call (fndecl, 0);
if (lhs)
gimple_call_set_lhs (g, lhs);
return g;
}
/* Find OMP_FOR resp. OMP_SIMD with non-NULL OMP_FOR_INIT. Also, fill in pdata
array, pdata[0] non-NULL if there is anything non-trivial in between,
pdata[1] is address of OMP_PARALLEL in between if any, pdata[2] is address
of OMP_FOR in between if any and pdata[3] is address of the inner
OMP_FOR/OMP_SIMD. */
tree
find_combined_omp_for (tree *tp, int *walk_subtrees, void *data)
{
tree **pdata = (tree **) data;
*walk_subtrees = 0;
switch (TREE_CODE (*tp))
{
case OMP_FOR:
if (OMP_FOR_INIT (*tp) != NULL_TREE)
{
pdata[3] = tp;
return *tp;
}
pdata[2] = tp;
*walk_subtrees = 1;
break;
case OMP_SIMD:
if (OMP_FOR_INIT (*tp) != NULL_TREE)
{
pdata[3] = tp;
return *tp;
}
break;
case BIND_EXPR:
if (BIND_EXPR_VARS (*tp)
|| (BIND_EXPR_BLOCK (*tp)
&& BLOCK_VARS (BIND_EXPR_BLOCK (*tp))))
pdata[0] = tp;
*walk_subtrees = 1;
break;
case STATEMENT_LIST:
if (!tsi_one_before_end_p (tsi_start (*tp)))
pdata[0] = tp;
*walk_subtrees = 1;
break;
case TRY_FINALLY_EXPR:
pdata[0] = tp;
*walk_subtrees = 1;
break;
case OMP_PARALLEL:
pdata[1] = tp;
*walk_subtrees = 1;
break;
default:
break;
}
return NULL_TREE;
}
/* Return maximum possible vectorization factor for the target. */
poly_uint64
omp_max_vf (void)
{
if (!optimize
|| optimize_debug
|| !flag_tree_loop_optimize
|| (!flag_tree_loop_vectorize
&& global_options_set.x_flag_tree_loop_vectorize))
return 1;
auto_vector_modes modes;
targetm.vectorize.autovectorize_vector_modes (&modes, true);
if (!modes.is_empty ())
{
poly_uint64 vf = 0;
for (unsigned int i = 0; i < modes.length (); ++i)
/* The returned modes use the smallest element size (and thus
the largest nunits) for the vectorization approach that they
represent. */
vf = ordered_max (vf, GET_MODE_NUNITS (modes[i]));
return vf;
}
machine_mode vqimode = targetm.vectorize.preferred_simd_mode (QImode);
if (GET_MODE_CLASS (vqimode) == MODE_VECTOR_INT)
return GET_MODE_NUNITS (vqimode);
return 1;
}
/* Return maximum SIMT width if offloading may target SIMT hardware. */
int
omp_max_simt_vf (void)
{
if (!optimize)
return 0;
if (ENABLE_OFFLOADING)
for (const char *c = getenv ("OFFLOAD_TARGET_NAMES"); c;)
{
if (!strncmp (c, "nvptx", strlen ("nvptx")))
return 32;
else if ((c = strchr (c, ':')))
c++;
}
return 0;
}
/* Store the construct selectors as tree codes from last to first,
return their number. */
int
omp_constructor_traits_to_codes (tree ctx, enum tree_code *constructs)
{
int nconstructs = list_length (ctx);
int i = nconstructs - 1;
for (tree t2 = ctx; t2; t2 = TREE_CHAIN (t2), i--)
{
const char *sel = IDENTIFIER_POINTER (TREE_PURPOSE (t2));
if (!strcmp (sel, "target"))
constructs[i] = OMP_TARGET;
else if (!strcmp (sel, "teams"))
constructs[i] = OMP_TEAMS;
else if (!strcmp (sel, "parallel"))
constructs[i] = OMP_PARALLEL;
else if (!strcmp (sel, "for") || !strcmp (sel, "do"))
constructs[i] = OMP_FOR;
else if (!strcmp (sel, "simd"))
constructs[i] = OMP_SIMD;
else
gcc_unreachable ();
}
gcc_assert (i == -1);
return nconstructs;
}
/* Return true if PROP is possibly present in one of the offloading target's
OpenMP contexts. The format of PROPS string is always offloading target's
name terminated by '\0', followed by properties for that offloading
target separated by '\0' and terminated by another '\0'. The strings
are created from omp-device-properties installed files of all configured
offloading targets. */
static bool
omp_offload_device_kind_arch_isa (const char *props, const char *prop)
{
const char *names = getenv ("OFFLOAD_TARGET_NAMES");
if (names == NULL || *names == '\0')
return false;
while (*props != '\0')
{
size_t name_len = strlen (props);
bool matches = false;
for (const char *c = names; c; )
{
if (strncmp (props, c, name_len) == 0
&& (c[name_len] == '\0'
|| c[name_len] == ':'
|| c[name_len] == '='))
{
matches = true;
break;
}
else if ((c = strchr (c, ':')))
c++;
}
props = props + name_len + 1;
while (*props != '\0')
{
if (matches && strcmp (props, prop) == 0)
return true;
props = strchr (props, '\0') + 1;
}
props++;
}
return false;
}
/* Return true if the current code location is or might be offloaded.
Return true in declare target functions, or when nested in a target
region or when unsure, return false otherwise. */
static bool
omp_maybe_offloaded (void)
{
if (!hsa_gen_requested_p ())
{
if (!ENABLE_OFFLOADING)
return false;
const char *names = getenv ("OFFLOAD_TARGET_NAMES");
if (names == NULL || *names == '\0')
return false;
}
if (symtab->state == PARSING)
/* Maybe. */
return true;
if (current_function_decl
&& lookup_attribute ("omp declare target",
DECL_ATTRIBUTES (current_function_decl)))
return true;
if (cfun && (cfun->curr_properties & PROP_gimple_any) == 0)
{
enum tree_code construct = OMP_TARGET;
if (omp_construct_selector_matches (&construct, 1, NULL))
return true;
}
return false;
}
/* Return a name from PROP, a property in selectors accepting
name lists. */
static const char *
omp_context_name_list_prop (tree prop)
{
if (TREE_PURPOSE (prop))
return IDENTIFIER_POINTER (TREE_PURPOSE (prop));
else
{
const char *ret = TREE_STRING_POINTER (TREE_VALUE (prop));
if ((size_t) TREE_STRING_LENGTH (TREE_VALUE (prop)) == strlen (ret) + 1)
return ret;
return NULL;
}
}
/* Return 1 if context selector matches the current OpenMP context, 0
if it does not and -1 if it is unknown and need to be determined later.
Some properties can be checked right away during parsing (this routine),
others need to wait until the whole TU is parsed, others need to wait until
IPA, others until vectorization. */
int
omp_context_selector_matches (tree ctx)
{
int ret = 1;
for (tree t1 = ctx; t1; t1 = TREE_CHAIN (t1))
{
char set = IDENTIFIER_POINTER (TREE_PURPOSE (t1))[0];
if (set == 'c')
{
/* For now, ignore the construct set. While something can be
determined already during parsing, we don't know until end of TU
whether additional constructs aren't added through declare variant
unless "omp declare variant variant" attribute exists already
(so in most of the cases), and we'd need to maintain set of
surrounding OpenMP constructs, which is better handled during
gimplification. */
if (symtab->state == PARSING
|| (cfun->curr_properties & PROP_gimple_any) != 0)
{
ret = -1;
continue;
}
enum tree_code constructs[5];
int nconstructs
= omp_constructor_traits_to_codes (TREE_VALUE (t1), constructs);
int r = omp_construct_selector_matches (constructs, nconstructs,
NULL);
if (r == 0)
return 0;
if (r == -1)
ret = -1;
continue;
}
for (tree t2 = TREE_VALUE (t1); t2; t2 = TREE_CHAIN (t2))
{
const char *sel = IDENTIFIER_POINTER (TREE_PURPOSE (t2));
switch (*sel)
{
case 'v':
if (set == 'i' && !strcmp (sel, "vendor"))
for (tree t3 = TREE_VALUE (t2); t3; t3 = TREE_CHAIN (t3))
{
const char *prop = omp_context_name_list_prop (t3);
if (prop == NULL)
return 0;
if ((!strcmp (prop, " score") && TREE_PURPOSE (t3))
|| !strcmp (prop, "gnu"))
continue;
return 0;
}
break;
case 'e':
if (set == 'i' && !strcmp (sel, "extension"))
/* We don't support any extensions right now. */
return 0;
break;
case 'a':
if (set == 'i' && !strcmp (sel, "atomic_default_mem_order"))
{
enum omp_memory_order omo
= ((enum omp_memory_order)
(omp_requires_mask
& OMP_REQUIRES_ATOMIC_DEFAULT_MEM_ORDER));
if (omo == OMP_MEMORY_ORDER_UNSPECIFIED)
{
/* We don't know yet, until end of TU. */
if (symtab->state == PARSING)
{
ret = -1;
break;
}
else
omo = OMP_MEMORY_ORDER_RELAXED;
}
tree t3 = TREE_VALUE (t2);
const char *prop = IDENTIFIER_POINTER (TREE_PURPOSE (t3));
if (!strcmp (prop, " score"))
{
t3 = TREE_CHAIN (t3);
prop = IDENTIFIER_POINTER (TREE_PURPOSE (t3));
}
if (!strcmp (prop, "relaxed")
&& omo != OMP_MEMORY_ORDER_RELAXED)
return 0;
else if (!strcmp (prop, "seq_cst")
&& omo != OMP_MEMORY_ORDER_SEQ_CST)
return 0;
else if (!strcmp (prop, "acq_rel")
&& omo != OMP_MEMORY_ORDER_ACQ_REL)
return 0;
}
if (set == 'd' && !strcmp (sel, "arch"))
for (tree t3 = TREE_VALUE (t2); t3; t3 = TREE_CHAIN (t3))
{
const char *arch = omp_context_name_list_prop (t3);
if (arch == NULL)
return 0;
int r = 0;
if (targetm.omp.device_kind_arch_isa != NULL)
r = targetm.omp.device_kind_arch_isa (omp_device_arch,
arch);
if (r == 0 || (r == -1 && symtab->state != PARSING))
{
/* If we are or might be in a target region or
declare target function, need to take into account
also offloading values. */
if (!omp_maybe_offloaded ())
return 0;
if (strcmp (arch, "hsa") == 0
&& hsa_gen_requested_p ())
{
ret = -1;
continue;
}
if (ENABLE_OFFLOADING)
{
const char *arches = omp_offload_device_arch;
if (omp_offload_device_kind_arch_isa (arches,
arch))
{
ret = -1;
continue;
}
}
return 0;
}
else if (r == -1)
ret = -1;
/* If arch matches on the host, it still might not match
in the offloading region. */
else if (omp_maybe_offloaded ())
ret = -1;
}
break;
case 'u':
if (set == 'i' && !strcmp (sel, "unified_address"))
{
if ((omp_requires_mask & OMP_REQUIRES_UNIFIED_ADDRESS) == 0)
{
if (symtab->state == PARSING)
ret = -1;
else
return 0;
}
break;
}
if (set == 'i' && !strcmp (sel, "unified_shared_memory"))
{
if ((omp_requires_mask
& OMP_REQUIRES_UNIFIED_SHARED_MEMORY) == 0)
{
if (symtab->state == PARSING)
ret = -1;
else
return 0;
}
break;
}
break;
case 'd':
if (set == 'i' && !strcmp (sel, "dynamic_allocators"))
{
if ((omp_requires_mask
& OMP_REQUIRES_DYNAMIC_ALLOCATORS) == 0)
{
if (symtab->state == PARSING)
ret = -1;
else
return 0;
}
break;
}
break;
case 'r':
if (set == 'i' && !strcmp (sel, "reverse_offload"))
{
if ((omp_requires_mask & OMP_REQUIRES_REVERSE_OFFLOAD) == 0)
{
if (symtab->state == PARSING)
ret = -1;
else
return 0;
}
break;
}
break;
case 'k':
if (set == 'd' && !strcmp (sel, "kind"))
for (tree t3 = TREE_VALUE (t2); t3; t3 = TREE_CHAIN (t3))
{
const char *prop = omp_context_name_list_prop (t3);
if (prop == NULL)
return 0;
if (!strcmp (prop, "any"))
continue;
if (!strcmp (prop, "host"))
{
if (omp_maybe_offloaded ())
ret = -1;
continue;
}
if (!strcmp (prop, "nohost"))
{
if (omp_maybe_offloaded ())
ret = -1;
else
return 0;
continue;
}
int r = 0;
if (targetm.omp.device_kind_arch_isa != NULL)
r = targetm.omp.device_kind_arch_isa (omp_device_kind,
prop);
else
r = strcmp (prop, "cpu") == 0;
if (r == 0 || (r == -1 && symtab->state != PARSING))
{
/* If we are or might be in a target region or
declare target function, need to take into account
also offloading values. */
if (!omp_maybe_offloaded ())
return 0;
if (strcmp (prop, "gpu") == 0
&& hsa_gen_requested_p ())
{
ret = -1;
continue;
}
if (ENABLE_OFFLOADING)
{
const char *kinds = omp_offload_device_kind;
if (omp_offload_device_kind_arch_isa (kinds, prop))
{
ret = -1;
continue;
}
}
return 0;
}
else if (r == -1)
ret = -1;
/* If kind matches on the host, it still might not match
in the offloading region. */
else if (omp_maybe_offloaded ())
ret = -1;
}
break;
case 'i':
if (set == 'd' && !strcmp (sel, "isa"))
for (tree t3 = TREE_VALUE (t2); t3; t3 = TREE_CHAIN (t3))
{
const char *isa = omp_context_name_list_prop (t3);
if (isa == NULL)
return 0;
int r = 0;
if (targetm.omp.device_kind_arch_isa != NULL)
r = targetm.omp.device_kind_arch_isa (omp_device_isa,
isa);
if (r == 0 || (r == -1 && symtab->state != PARSING))
{
/* If isa is valid on the target, but not in the
current function and current function has
#pragma omp declare simd on it, some simd clones