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
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
|
/* C++-specific tree lowering bits; see also c-gimplify.c and tree-gimple.c.
Copyright (C) 2002-2016 Free Software Foundation, Inc.
Contributed by Jason Merrill <jason@redhat.com>
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 "coretypes.h"
#include "target.h"
#include "basic-block.h"
#include "cp-tree.h"
#include "gimple.h"
#include "predict.h"
#include "stor-layout.h"
#include "tree-iterator.h"
#include "gimplify.h"
#include "c-family/c-ubsan.h"
#include "cilk.h"
/* Forward declarations. */
static tree cp_genericize_r (tree *, int *, void *);
static tree cp_fold_r (tree *, int *, void *);
static void cp_genericize_tree (tree*);
static tree cp_fold (tree);
/* Local declarations. */
enum bc_t { bc_break = 0, bc_continue = 1 };
/* Stack of labels which are targets for "break" or "continue",
linked through TREE_CHAIN. */
static tree bc_label[2];
/* Begin a scope which can be exited by a break or continue statement. BC
indicates which.
Just creates a label with location LOCATION and pushes it into the current
context. */
static tree
begin_bc_block (enum bc_t bc, location_t location)
{
tree label = create_artificial_label (location);
DECL_CHAIN (label) = bc_label[bc];
bc_label[bc] = label;
if (bc == bc_break)
LABEL_DECL_BREAK (label) = true;
else
LABEL_DECL_CONTINUE (label) = true;
return label;
}
/* Finish a scope which can be exited by a break or continue statement.
LABEL was returned from the most recent call to begin_bc_block. BLOCK is
an expression for the contents of the scope.
If we saw a break (or continue) in the scope, append a LABEL_EXPR to
BLOCK. Otherwise, just forget the label. */
static void
finish_bc_block (tree *block, enum bc_t bc, tree label)
{
gcc_assert (label == bc_label[bc]);
if (TREE_USED (label))
append_to_statement_list (build1 (LABEL_EXPR, void_type_node, label),
block);
bc_label[bc] = DECL_CHAIN (label);
DECL_CHAIN (label) = NULL_TREE;
}
/* This function is a wrapper for cilk_gimplify_call_params_in_spawned_fn.
*EXPR_P can be a CALL_EXPR, INIT_EXPR, MODIFY_EXPR, AGGR_INIT_EXPR or
TARGET_EXPR. *PRE_P and *POST_P are gimple sequences from the caller
of gimplify_cilk_spawn. */
static void
cilk_cp_gimplify_call_params_in_spawned_fn (tree *expr_p, gimple_seq *pre_p,
gimple_seq *post_p)
{
int ii = 0;
cilk_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
if (TREE_CODE (*expr_p) == AGGR_INIT_EXPR)
for (ii = 0; ii < aggr_init_expr_nargs (*expr_p); ii++)
gimplify_expr (&AGGR_INIT_EXPR_ARG (*expr_p, ii), pre_p, post_p,
is_gimple_reg, fb_rvalue);
}
/* Get the LABEL_EXPR to represent a break or continue statement
in the current block scope. BC indicates which. */
static tree
get_bc_label (enum bc_t bc)
{
tree label = bc_label[bc];
/* Mark the label used for finish_bc_block. */
TREE_USED (label) = 1;
return label;
}
/* Genericize a TRY_BLOCK. */
static void
genericize_try_block (tree *stmt_p)
{
tree body = TRY_STMTS (*stmt_p);
tree cleanup = TRY_HANDLERS (*stmt_p);
*stmt_p = build2 (TRY_CATCH_EXPR, void_type_node, body, cleanup);
}
/* Genericize a HANDLER by converting to a CATCH_EXPR. */
static void
genericize_catch_block (tree *stmt_p)
{
tree type = HANDLER_TYPE (*stmt_p);
tree body = HANDLER_BODY (*stmt_p);
/* FIXME should the caught type go in TREE_TYPE? */
*stmt_p = build2 (CATCH_EXPR, void_type_node, type, body);
}
/* A terser interface for building a representation of an exception
specification. */
static tree
build_gimple_eh_filter_tree (tree body, tree allowed, tree failure)
{
tree t;
/* FIXME should the allowed types go in TREE_TYPE? */
t = build2 (EH_FILTER_EXPR, void_type_node, allowed, NULL_TREE);
append_to_statement_list (failure, &EH_FILTER_FAILURE (t));
t = build2 (TRY_CATCH_EXPR, void_type_node, NULL_TREE, t);
append_to_statement_list (body, &TREE_OPERAND (t, 0));
return t;
}
/* Genericize an EH_SPEC_BLOCK by converting it to a
TRY_CATCH_EXPR/EH_FILTER_EXPR pair. */
static void
genericize_eh_spec_block (tree *stmt_p)
{
tree body = EH_SPEC_STMTS (*stmt_p);
tree allowed = EH_SPEC_RAISES (*stmt_p);
tree failure = build_call_n (call_unexpected_node, 1, build_exc_ptr ());
*stmt_p = build_gimple_eh_filter_tree (body, allowed, failure);
TREE_NO_WARNING (*stmt_p) = true;
TREE_NO_WARNING (TREE_OPERAND (*stmt_p, 1)) = true;
}
/* Genericize an IF_STMT by turning it into a COND_EXPR. */
static void
genericize_if_stmt (tree *stmt_p)
{
tree stmt, cond, then_, else_;
location_t locus = EXPR_LOCATION (*stmt_p);
stmt = *stmt_p;
cond = IF_COND (stmt);
then_ = THEN_CLAUSE (stmt);
else_ = ELSE_CLAUSE (stmt);
if (!then_)
then_ = build_empty_stmt (locus);
if (!else_)
else_ = build_empty_stmt (locus);
if (integer_nonzerop (cond) && !TREE_SIDE_EFFECTS (else_))
stmt = then_;
else if (integer_zerop (cond) && !TREE_SIDE_EFFECTS (then_))
stmt = else_;
else
stmt = build3 (COND_EXPR, void_type_node, cond, then_, else_);
if (!EXPR_HAS_LOCATION (stmt))
protected_set_expr_location (stmt, locus);
*stmt_p = stmt;
}
/* Build a generic representation of one of the C loop forms. COND is the
loop condition or NULL_TREE. BODY is the (possibly compound) statement
controlled by the loop. INCR is the increment expression of a for-loop,
or NULL_TREE. COND_IS_FIRST indicates whether the condition is
evaluated before the loop body as in while and for loops, or after the
loop body as in do-while loops. */
static void
genericize_cp_loop (tree *stmt_p, location_t start_locus, tree cond, tree body,
tree incr, bool cond_is_first, int *walk_subtrees,
void *data)
{
tree blab, clab;
tree exit = NULL;
tree stmt_list = NULL;
blab = begin_bc_block (bc_break, start_locus);
clab = begin_bc_block (bc_continue, start_locus);
protected_set_expr_location (incr, start_locus);
cp_walk_tree (&cond, cp_genericize_r, data, NULL);
cp_walk_tree (&body, cp_genericize_r, data, NULL);
cp_walk_tree (&incr, cp_genericize_r, data, NULL);
*walk_subtrees = 0;
if (cond && TREE_CODE (cond) != INTEGER_CST)
{
/* If COND is constant, don't bother building an exit. If it's false,
we won't build a loop. If it's true, any exits are in the body. */
location_t cloc = EXPR_LOC_OR_LOC (cond, start_locus);
exit = build1_loc (cloc, GOTO_EXPR, void_type_node,
get_bc_label (bc_break));
exit = fold_build3_loc (cloc, COND_EXPR, void_type_node, cond,
build_empty_stmt (cloc), exit);
}
if (exit && cond_is_first)
append_to_statement_list (exit, &stmt_list);
append_to_statement_list (body, &stmt_list);
finish_bc_block (&stmt_list, bc_continue, clab);
append_to_statement_list (incr, &stmt_list);
if (exit && !cond_is_first)
append_to_statement_list (exit, &stmt_list);
if (!stmt_list)
stmt_list = build_empty_stmt (start_locus);
tree loop;
if (cond && integer_zerop (cond))
{
if (cond_is_first)
loop = fold_build3_loc (start_locus, COND_EXPR,
void_type_node, cond, stmt_list,
build_empty_stmt (start_locus));
else
loop = stmt_list;
}
else
{
location_t loc = start_locus;
if (!cond || integer_nonzerop (cond))
loc = EXPR_LOCATION (expr_first (body));
if (loc == UNKNOWN_LOCATION)
loc = start_locus;
loop = build1_loc (loc, LOOP_EXPR, void_type_node, stmt_list);
}
stmt_list = NULL;
append_to_statement_list (loop, &stmt_list);
finish_bc_block (&stmt_list, bc_break, blab);
if (!stmt_list)
stmt_list = build_empty_stmt (start_locus);
*stmt_p = stmt_list;
}
/* Genericize a FOR_STMT node *STMT_P. */
static void
genericize_for_stmt (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
tree expr = NULL;
tree loop;
tree init = FOR_INIT_STMT (stmt);
if (init)
{
cp_walk_tree (&init, cp_genericize_r, data, NULL);
append_to_statement_list (init, &expr);
}
genericize_cp_loop (&loop, EXPR_LOCATION (stmt), FOR_COND (stmt),
FOR_BODY (stmt), FOR_EXPR (stmt), 1, walk_subtrees, data);
append_to_statement_list (loop, &expr);
if (expr == NULL_TREE)
expr = loop;
*stmt_p = expr;
}
/* Genericize a WHILE_STMT node *STMT_P. */
static void
genericize_while_stmt (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
genericize_cp_loop (stmt_p, EXPR_LOCATION (stmt), WHILE_COND (stmt),
WHILE_BODY (stmt), NULL_TREE, 1, walk_subtrees, data);
}
/* Genericize a DO_STMT node *STMT_P. */
static void
genericize_do_stmt (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
genericize_cp_loop (stmt_p, EXPR_LOCATION (stmt), DO_COND (stmt),
DO_BODY (stmt), NULL_TREE, 0, walk_subtrees, data);
}
/* Genericize a SWITCH_STMT node *STMT_P by turning it into a SWITCH_EXPR. */
static void
genericize_switch_stmt (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
tree break_block, body, cond, type;
location_t stmt_locus = EXPR_LOCATION (stmt);
break_block = begin_bc_block (bc_break, stmt_locus);
body = SWITCH_STMT_BODY (stmt);
if (!body)
body = build_empty_stmt (stmt_locus);
cond = SWITCH_STMT_COND (stmt);
type = SWITCH_STMT_TYPE (stmt);
cp_walk_tree (&body, cp_genericize_r, data, NULL);
cp_walk_tree (&cond, cp_genericize_r, data, NULL);
cp_walk_tree (&type, cp_genericize_r, data, NULL);
*walk_subtrees = 0;
*stmt_p = build3_loc (stmt_locus, SWITCH_EXPR, type, cond, body, NULL_TREE);
finish_bc_block (stmt_p, bc_break, break_block);
}
/* Genericize a CONTINUE_STMT node *STMT_P. */
static void
genericize_continue_stmt (tree *stmt_p)
{
tree stmt_list = NULL;
tree pred = build_predict_expr (PRED_CONTINUE, NOT_TAKEN);
tree label = get_bc_label (bc_continue);
location_t location = EXPR_LOCATION (*stmt_p);
tree jump = build1_loc (location, GOTO_EXPR, void_type_node, label);
append_to_statement_list (pred, &stmt_list);
append_to_statement_list (jump, &stmt_list);
*stmt_p = stmt_list;
}
/* Genericize a BREAK_STMT node *STMT_P. */
static void
genericize_break_stmt (tree *stmt_p)
{
tree label = get_bc_label (bc_break);
location_t location = EXPR_LOCATION (*stmt_p);
*stmt_p = build1_loc (location, GOTO_EXPR, void_type_node, label);
}
/* Genericize a OMP_FOR node *STMT_P. */
static void
genericize_omp_for_stmt (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
location_t locus = EXPR_LOCATION (stmt);
tree clab = begin_bc_block (bc_continue, locus);
cp_walk_tree (&OMP_FOR_BODY (stmt), cp_genericize_r, data, NULL);
cp_walk_tree (&OMP_FOR_CLAUSES (stmt), cp_genericize_r, data, NULL);
cp_walk_tree (&OMP_FOR_INIT (stmt), cp_genericize_r, data, NULL);
cp_walk_tree (&OMP_FOR_COND (stmt), cp_genericize_r, data, NULL);
cp_walk_tree (&OMP_FOR_INCR (stmt), cp_genericize_r, data, NULL);
cp_walk_tree (&OMP_FOR_PRE_BODY (stmt), cp_genericize_r, data, NULL);
*walk_subtrees = 0;
finish_bc_block (&OMP_FOR_BODY (stmt), bc_continue, clab);
}
/* Hook into the middle of gimplifying an OMP_FOR node. */
static enum gimplify_status
cp_gimplify_omp_for (tree *expr_p, gimple_seq *pre_p)
{
tree for_stmt = *expr_p;
gimple_seq seq = NULL;
/* Protect ourselves from recursion. */
if (OMP_FOR_GIMPLIFYING_P (for_stmt))
return GS_UNHANDLED;
OMP_FOR_GIMPLIFYING_P (for_stmt) = 1;
gimplify_and_add (for_stmt, &seq);
gimple_seq_add_seq (pre_p, seq);
OMP_FOR_GIMPLIFYING_P (for_stmt) = 0;
return GS_ALL_DONE;
}
/* Gimplify an EXPR_STMT node. */
static void
gimplify_expr_stmt (tree *stmt_p)
{
tree stmt = EXPR_STMT_EXPR (*stmt_p);
if (stmt == error_mark_node)
stmt = NULL;
/* Gimplification of a statement expression will nullify the
statement if all its side effects are moved to *PRE_P and *POST_P.
In this case we will not want to emit the gimplified statement.
However, we may still want to emit a warning, so we do that before
gimplification. */
if (stmt && warn_unused_value)
{
if (!TREE_SIDE_EFFECTS (stmt))
{
if (!IS_EMPTY_STMT (stmt)
&& !VOID_TYPE_P (TREE_TYPE (stmt))
&& !TREE_NO_WARNING (stmt))
warning (OPT_Wunused_value, "statement with no effect");
}
else
warn_if_unused_value (stmt, input_location);
}
if (stmt == NULL_TREE)
stmt = alloc_stmt_list ();
*stmt_p = stmt;
}
/* Gimplify initialization from an AGGR_INIT_EXPR. */
static void
cp_gimplify_init_expr (tree *expr_p)
{
tree from = TREE_OPERAND (*expr_p, 1);
tree to = TREE_OPERAND (*expr_p, 0);
tree t;
/* What about code that pulls out the temp and uses it elsewhere? I
think that such code never uses the TARGET_EXPR as an initializer. If
I'm wrong, we'll abort because the temp won't have any RTL. In that
case, I guess we'll need to replace references somehow. */
if (TREE_CODE (from) == TARGET_EXPR)
from = TARGET_EXPR_INITIAL (from);
/* Look through any COMPOUND_EXPRs, since build_compound_expr pushes them
inside the TARGET_EXPR. */
for (t = from; t; )
{
tree sub = TREE_CODE (t) == COMPOUND_EXPR ? TREE_OPERAND (t, 0) : t;
/* If we are initializing from an AGGR_INIT_EXPR, drop the INIT_EXPR and
replace the slot operand with our target.
Should we add a target parm to gimplify_expr instead? No, as in this
case we want to replace the INIT_EXPR. */
if (TREE_CODE (sub) == AGGR_INIT_EXPR
|| TREE_CODE (sub) == VEC_INIT_EXPR)
{
if (TREE_CODE (sub) == AGGR_INIT_EXPR)
AGGR_INIT_EXPR_SLOT (sub) = to;
else
VEC_INIT_EXPR_SLOT (sub) = to;
*expr_p = from;
/* The initialization is now a side-effect, so the container can
become void. */
if (from != sub)
TREE_TYPE (from) = void_type_node;
}
if (cxx_dialect >= cxx14 && TREE_CODE (sub) == CONSTRUCTOR)
/* Handle aggregate NSDMI. */
replace_placeholders (sub, to);
if (t == sub)
break;
else
t = TREE_OPERAND (t, 1);
}
}
/* Gimplify a MUST_NOT_THROW_EXPR. */
static enum gimplify_status
gimplify_must_not_throw_expr (tree *expr_p, gimple_seq *pre_p)
{
tree stmt = *expr_p;
tree temp = voidify_wrapper_expr (stmt, NULL);
tree body = TREE_OPERAND (stmt, 0);
gimple_seq try_ = NULL;
gimple_seq catch_ = NULL;
gimple *mnt;
gimplify_and_add (body, &try_);
mnt = gimple_build_eh_must_not_throw (terminate_node);
gimple_seq_add_stmt_without_update (&catch_, mnt);
mnt = gimple_build_try (try_, catch_, GIMPLE_TRY_CATCH);
gimple_seq_add_stmt_without_update (pre_p, mnt);
if (temp)
{
*expr_p = temp;
return GS_OK;
}
*expr_p = NULL;
return GS_ALL_DONE;
}
/* Return TRUE if an operand (OP) of a given TYPE being copied is
really just an empty class copy.
Check that the operand has a simple form so that TARGET_EXPRs and
non-empty CONSTRUCTORs get reduced properly, and we leave the
return slot optimization alone because it isn't a copy. */
static bool
simple_empty_class_p (tree type, tree op)
{
return
((TREE_CODE (op) == COMPOUND_EXPR
&& simple_empty_class_p (type, TREE_OPERAND (op, 1)))
|| is_gimple_lvalue (op)
|| INDIRECT_REF_P (op)
|| (TREE_CODE (op) == CONSTRUCTOR
&& CONSTRUCTOR_NELTS (op) == 0
&& !TREE_CLOBBER_P (op))
|| (TREE_CODE (op) == CALL_EXPR
&& !CALL_EXPR_RETURN_SLOT_OPT (op)))
&& is_really_empty_class (type);
}
/* Do C++-specific gimplification. Args are as for gimplify_expr. */
int
cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
int saved_stmts_are_full_exprs_p = 0;
enum tree_code code = TREE_CODE (*expr_p);
enum gimplify_status ret;
if (STATEMENT_CODE_P (code))
{
saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
current_stmt_tree ()->stmts_are_full_exprs_p
= STMT_IS_FULL_EXPR_P (*expr_p);
}
switch (code)
{
case PTRMEM_CST:
*expr_p = cplus_expand_constant (*expr_p);
ret = GS_OK;
break;
case AGGR_INIT_EXPR:
simplify_aggr_init_expr (expr_p);
ret = GS_OK;
break;
case VEC_INIT_EXPR:
{
location_t loc = input_location;
tree init = VEC_INIT_EXPR_INIT (*expr_p);
int from_array = (init && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE);
gcc_assert (EXPR_HAS_LOCATION (*expr_p));
input_location = EXPR_LOCATION (*expr_p);
*expr_p = build_vec_init (VEC_INIT_EXPR_SLOT (*expr_p), NULL_TREE,
init, VEC_INIT_EXPR_VALUE_INIT (*expr_p),
from_array,
tf_warning_or_error);
cp_genericize_tree (expr_p);
ret = GS_OK;
input_location = loc;
}
break;
case THROW_EXPR:
/* FIXME communicate throw type to back end, probably by moving
THROW_EXPR into ../tree.def. */
*expr_p = TREE_OPERAND (*expr_p, 0);
ret = GS_OK;
break;
case MUST_NOT_THROW_EXPR:
ret = gimplify_must_not_throw_expr (expr_p, pre_p);
break;
/* We used to do this for MODIFY_EXPR as well, but that's unsafe; the
LHS of an assignment might also be involved in the RHS, as in bug
25979. */
case INIT_EXPR:
if (fn_contains_cilk_spawn_p (cfun))
{
if (cilk_detect_spawn_and_unwrap (expr_p))
{
cilk_cp_gimplify_call_params_in_spawned_fn (expr_p,
pre_p, post_p);
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
}
if (seen_error () && contains_cilk_spawn_stmt (*expr_p))
return GS_ERROR;
}
cp_gimplify_init_expr (expr_p);
if (TREE_CODE (*expr_p) != INIT_EXPR)
return GS_OK;
/* Otherwise fall through. */
case MODIFY_EXPR:
modify_expr_case:
{
if (fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p)
&& !seen_error ())
{
cilk_cp_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
}
/* If the back end isn't clever enough to know that the lhs and rhs
types are the same, add an explicit conversion. */
tree op0 = TREE_OPERAND (*expr_p, 0);
tree op1 = TREE_OPERAND (*expr_p, 1);
if (!error_operand_p (op0)
&& !error_operand_p (op1)
&& (TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (op0))
|| TYPE_STRUCTURAL_EQUALITY_P (TREE_TYPE (op1)))
&& !useless_type_conversion_p (TREE_TYPE (op1), TREE_TYPE (op0)))
TREE_OPERAND (*expr_p, 1) = build1 (VIEW_CONVERT_EXPR,
TREE_TYPE (op0), op1);
else if (simple_empty_class_p (TREE_TYPE (op0), op1))
{
/* Remove any copies of empty classes. Also drop volatile
variables on the RHS to avoid infinite recursion from
gimplify_expr trying to load the value. */
gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
is_gimple_lvalue, fb_lvalue);
if (TREE_SIDE_EFFECTS (op1))
{
if (TREE_THIS_VOLATILE (op1)
&& (REFERENCE_CLASS_P (op1) || DECL_P (op1)))
op1 = build_fold_addr_expr (op1);
gimplify_and_add (op1, pre_p);
}
*expr_p = TREE_OPERAND (*expr_p, 0);
}
}
ret = GS_OK;
break;
case EMPTY_CLASS_EXPR:
/* We create an empty CONSTRUCTOR with RECORD_TYPE. */
*expr_p = build_constructor (TREE_TYPE (*expr_p), NULL);
ret = GS_OK;
break;
case BASELINK:
*expr_p = BASELINK_FUNCTIONS (*expr_p);
ret = GS_OK;
break;
case TRY_BLOCK:
genericize_try_block (expr_p);
ret = GS_OK;
break;
case HANDLER:
genericize_catch_block (expr_p);
ret = GS_OK;
break;
case EH_SPEC_BLOCK:
genericize_eh_spec_block (expr_p);
ret = GS_OK;
break;
case USING_STMT:
gcc_unreachable ();
case FOR_STMT:
case WHILE_STMT:
case DO_STMT:
case SWITCH_STMT:
case CONTINUE_STMT:
case BREAK_STMT:
gcc_unreachable ();
case OMP_FOR:
case OMP_SIMD:
case OMP_DISTRIBUTE:
case OMP_TASKLOOP:
ret = cp_gimplify_omp_for (expr_p, pre_p);
break;
case EXPR_STMT:
gimplify_expr_stmt (expr_p);
ret = GS_OK;
break;
case UNARY_PLUS_EXPR:
{
tree arg = TREE_OPERAND (*expr_p, 0);
tree type = TREE_TYPE (*expr_p);
*expr_p = (TREE_TYPE (arg) != type) ? fold_convert (type, arg)
: arg;
ret = GS_OK;
}
break;
case CILK_SPAWN_STMT:
gcc_assert(fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p));
if (!seen_error ())
{
cilk_cp_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
}
return GS_ERROR;
case CALL_EXPR:
if (fn_contains_cilk_spawn_p (cfun)
&& cilk_detect_spawn_and_unwrap (expr_p)
&& !seen_error ())
{
cilk_cp_gimplify_call_params_in_spawned_fn (expr_p, pre_p, post_p);
return (enum gimplify_status) gimplify_cilk_spawn (expr_p);
}
/* DR 1030 says that we need to evaluate the elements of an
initializer-list in forward order even when it's used as arguments to
a constructor. So if the target wants to evaluate them in reverse
order and there's more than one argument other than 'this', gimplify
them in order. */
ret = GS_OK;
if (PUSH_ARGS_REVERSED && CALL_EXPR_LIST_INIT_P (*expr_p)
&& call_expr_nargs (*expr_p) > 2)
{
int nargs = call_expr_nargs (*expr_p);
location_t loc = EXPR_LOC_OR_LOC (*expr_p, input_location);
for (int i = 1; i < nargs; ++i)
{
enum gimplify_status t
= gimplify_arg (&CALL_EXPR_ARG (*expr_p, i), pre_p, loc);
if (t == GS_ERROR)
ret = GS_ERROR;
}
}
break;
case RETURN_EXPR:
if (TREE_OPERAND (*expr_p, 0)
&& (TREE_CODE (TREE_OPERAND (*expr_p, 0)) == INIT_EXPR
|| TREE_CODE (TREE_OPERAND (*expr_p, 0)) == MODIFY_EXPR))
{
expr_p = &TREE_OPERAND (*expr_p, 0);
code = TREE_CODE (*expr_p);
/* Avoid going through the INIT_EXPR case, which can
degrade INIT_EXPRs into AGGR_INIT_EXPRs. */
goto modify_expr_case;
}
/* Fall through. */
default:
ret = (enum gimplify_status) c_gimplify_expr (expr_p, pre_p, post_p);
break;
}
/* Restore saved state. */
if (STATEMENT_CODE_P (code))
current_stmt_tree ()->stmts_are_full_exprs_p
= saved_stmts_are_full_exprs_p;
return ret;
}
static inline bool
is_invisiref_parm (const_tree t)
{
return ((TREE_CODE (t) == PARM_DECL || TREE_CODE (t) == RESULT_DECL)
&& DECL_BY_REFERENCE (t));
}
/* Return true if the uid in both int tree maps are equal. */
bool
cxx_int_tree_map_hasher::equal (cxx_int_tree_map *a, cxx_int_tree_map *b)
{
return (a->uid == b->uid);
}
/* Hash a UID in a cxx_int_tree_map. */
unsigned int
cxx_int_tree_map_hasher::hash (cxx_int_tree_map *item)
{
return item->uid;
}
/* A stable comparison routine for use with splay trees and DECLs. */
static int
splay_tree_compare_decl_uid (splay_tree_key xa, splay_tree_key xb)
{
tree a = (tree) xa;
tree b = (tree) xb;
return DECL_UID (a) - DECL_UID (b);
}
/* OpenMP context during genericization. */
struct cp_genericize_omp_taskreg
{
bool is_parallel;
bool default_shared;
struct cp_genericize_omp_taskreg *outer;
splay_tree variables;
};
/* Return true if genericization should try to determine if
DECL is firstprivate or shared within task regions. */
static bool
omp_var_to_track (tree decl)
{
tree type = TREE_TYPE (decl);
if (is_invisiref_parm (decl))
type = TREE_TYPE (type);
while (TREE_CODE (type) == ARRAY_TYPE)
type = TREE_TYPE (type);
if (type == error_mark_node || !CLASS_TYPE_P (type))
return false;
if (VAR_P (decl) && CP_DECL_THREAD_LOCAL_P (decl))
return false;
if (cxx_omp_predetermined_sharing (decl) != OMP_CLAUSE_DEFAULT_UNSPECIFIED)
return false;
return true;
}
/* Note DECL use in OpenMP region OMP_CTX during genericization. */
static void
omp_cxx_notice_variable (struct cp_genericize_omp_taskreg *omp_ctx, tree decl)
{
splay_tree_node n = splay_tree_lookup (omp_ctx->variables,
(splay_tree_key) decl);
if (n == NULL)
{
int flags = OMP_CLAUSE_DEFAULT_SHARED;
if (omp_ctx->outer)
omp_cxx_notice_variable (omp_ctx->outer, decl);
if (!omp_ctx->default_shared)
{
struct cp_genericize_omp_taskreg *octx;
for (octx = omp_ctx->outer; octx; octx = octx->outer)
{
n = splay_tree_lookup (octx->variables, (splay_tree_key) decl);
if (n && n->value != OMP_CLAUSE_DEFAULT_SHARED)
{
flags = OMP_CLAUSE_DEFAULT_FIRSTPRIVATE;
break;
}
if (octx->is_parallel)
break;
}
if (octx == NULL
&& (TREE_CODE (decl) == PARM_DECL
|| (!(TREE_STATIC (decl) || DECL_EXTERNAL (decl))
&& DECL_CONTEXT (decl) == current_function_decl)))
flags = OMP_CLAUSE_DEFAULT_FIRSTPRIVATE;
if (flags == OMP_CLAUSE_DEFAULT_FIRSTPRIVATE)
{
/* DECL is implicitly determined firstprivate in
the current task construct. Ensure copy ctor and
dtor are instantiated, because during gimplification
it will be already too late. */
tree type = TREE_TYPE (decl);
if (is_invisiref_parm (decl))
type = TREE_TYPE (type);
while (TREE_CODE (type) == ARRAY_TYPE)
type = TREE_TYPE (type);
get_copy_ctor (type, tf_none);
get_dtor (type, tf_none);
}
}
splay_tree_insert (omp_ctx->variables, (splay_tree_key) decl, flags);
}
}
/* Genericization context. */
struct cp_genericize_data
{
hash_set<tree> *p_set;
vec<tree> bind_expr_stack;
struct cp_genericize_omp_taskreg *omp_ctx;
tree try_block;
bool no_sanitize_p;
};
/* Perform any pre-gimplification folding of C++ front end trees to
GENERIC.
Note: The folding of none-omp cases is something to move into
the middle-end. As for now we have most foldings only on GENERIC
in fold-const, we need to perform this before transformation to
GIMPLE-form. */
static tree
cp_fold_r (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt;
enum tree_code code;
*stmt_p = stmt = cp_fold (*stmt_p);
code = TREE_CODE (stmt);
if (code == OMP_FOR || code == OMP_SIMD || code == OMP_DISTRIBUTE
|| code == OMP_TASKLOOP || code == CILK_FOR || code == CILK_SIMD
|| code == OACC_LOOP)
{
tree x;
int i, n;
cp_walk_tree (&OMP_FOR_BODY (stmt), cp_fold_r, data, NULL);
cp_walk_tree (&OMP_FOR_CLAUSES (stmt), cp_fold_r, data, NULL);
cp_walk_tree (&OMP_FOR_INIT (stmt), cp_fold_r, data, NULL);
x = OMP_FOR_COND (stmt);
if (x && TREE_CODE_CLASS (TREE_CODE (x)) == tcc_comparison)
{
cp_walk_tree (&TREE_OPERAND (x, 0), cp_fold_r, data, NULL);
cp_walk_tree (&TREE_OPERAND (x, 1), cp_fold_r, data, NULL);
}
else if (x && TREE_CODE (x) == TREE_VEC)
{
n = TREE_VEC_LENGTH (x);
for (i = 0; i < n; i++)
{
tree o = TREE_VEC_ELT (x, i);
if (o && TREE_CODE_CLASS (TREE_CODE (o)) == tcc_comparison)
cp_walk_tree (&TREE_OPERAND (o, 1), cp_fold_r, data, NULL);
}
}
x = OMP_FOR_INCR (stmt);
if (x && TREE_CODE (x) == TREE_VEC)
{
n = TREE_VEC_LENGTH (x);
for (i = 0; i < n; i++)
{
tree o = TREE_VEC_ELT (x, i);
if (o && TREE_CODE (o) == MODIFY_EXPR)
o = TREE_OPERAND (o, 1);
if (o && (TREE_CODE (o) == PLUS_EXPR || TREE_CODE (o) == MINUS_EXPR
|| TREE_CODE (o) == POINTER_PLUS_EXPR))
{
cp_walk_tree (&TREE_OPERAND (o, 0), cp_fold_r, data, NULL);
cp_walk_tree (&TREE_OPERAND (o, 1), cp_fold_r, data, NULL);
}
}
}
cp_walk_tree (&OMP_FOR_PRE_BODY (stmt), cp_fold_r, data, NULL);
*walk_subtrees = 0;
}
return NULL;
}
/* Fold ALL the trees! FIXME we should be able to remove this, but
apparently that still causes optimization regressions. */
void
cp_fold_function (tree fndecl)
{
cp_walk_tree (&DECL_SAVED_TREE (fndecl), cp_fold_r, NULL, NULL);
}
/* Perform any pre-gimplification lowering of C++ front end trees to
GENERIC. */
static tree
cp_genericize_r (tree *stmt_p, int *walk_subtrees, void *data)
{
tree stmt = *stmt_p;
struct cp_genericize_data *wtd = (struct cp_genericize_data *) data;
hash_set<tree> *p_set = wtd->p_set;
/* If in an OpenMP context, note var uses. */
if (__builtin_expect (wtd->omp_ctx != NULL, 0)
&& (VAR_P (stmt)
|| TREE_CODE (stmt) == PARM_DECL
|| TREE_CODE (stmt) == RESULT_DECL)
&& omp_var_to_track (stmt))
omp_cxx_notice_variable (wtd->omp_ctx, stmt);
if (is_invisiref_parm (stmt)
/* Don't dereference parms in a thunk, pass the references through. */
&& !(DECL_THUNK_P (current_function_decl)
&& TREE_CODE (stmt) == PARM_DECL))
{
*stmt_p = convert_from_reference (stmt);
*walk_subtrees = 0;
return NULL;
}
/* Map block scope extern declarations to visible declarations with the
same name and type in outer scopes if any. */
if (cp_function_chain->extern_decl_map
&& VAR_OR_FUNCTION_DECL_P (stmt)
&& DECL_EXTERNAL (stmt))
{
struct cxx_int_tree_map *h, in;
in.uid = DECL_UID (stmt);
h = cp_function_chain->extern_decl_map->find_with_hash (&in, in.uid);
if (h)
{
*stmt_p = h->to;
*walk_subtrees = 0;
return NULL;
}
}
/* Other than invisiref parms, don't walk the same tree twice. */
if (p_set->contains (stmt))
{
*walk_subtrees = 0;
return NULL_TREE;
}
if (TREE_CODE (stmt) == ADDR_EXPR
&& is_invisiref_parm (TREE_OPERAND (stmt, 0)))
{
/* If in an OpenMP context, note var uses. */
if (__builtin_expect (wtd->omp_ctx != NULL, 0)
&& omp_var_to_track (TREE_OPERAND (stmt, 0)))
omp_cxx_notice_variable (wtd->omp_ctx, TREE_OPERAND (stmt, 0));
*stmt_p = fold_convert (TREE_TYPE (stmt), TREE_OPERAND (stmt, 0));
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == RETURN_EXPR
&& TREE_OPERAND (stmt, 0)
&& is_invisiref_parm (TREE_OPERAND (stmt, 0)))
/* Don't dereference an invisiref RESULT_DECL inside a RETURN_EXPR. */
*walk_subtrees = 0;
else if (TREE_CODE (stmt) == OMP_CLAUSE)
switch (OMP_CLAUSE_CODE (stmt))
{
case OMP_CLAUSE_LASTPRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
{
*walk_subtrees = 0;
if (OMP_CLAUSE_LASTPRIVATE_STMT (stmt))
cp_walk_tree (&OMP_CLAUSE_LASTPRIVATE_STMT (stmt),
cp_genericize_r, data, NULL);
}
break;
case OMP_CLAUSE_PRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
*walk_subtrees = 0;
else if (wtd->omp_ctx != NULL)
{
/* Private clause doesn't cause any references to the
var in outer contexts, avoid calling
omp_cxx_notice_variable for it. */
struct cp_genericize_omp_taskreg *old = wtd->omp_ctx;
wtd->omp_ctx = NULL;
cp_walk_tree (&OMP_CLAUSE_DECL (stmt), cp_genericize_r,
data, NULL);
wtd->omp_ctx = old;
*walk_subtrees = 0;
}
break;
case OMP_CLAUSE_SHARED:
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_COPYIN:
case OMP_CLAUSE_COPYPRIVATE:
/* Don't dereference an invisiref in OpenMP clauses. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
*walk_subtrees = 0;
break;
case OMP_CLAUSE_REDUCTION:
/* Don't dereference an invisiref in reduction clause's
OMP_CLAUSE_DECL either. OMP_CLAUSE_REDUCTION_{INIT,MERGE}
still needs to be genericized. */
if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
{
*walk_subtrees = 0;
if (OMP_CLAUSE_REDUCTION_INIT (stmt))
cp_walk_tree (&OMP_CLAUSE_REDUCTION_INIT (stmt),
cp_genericize_r, data, NULL);
if (OMP_CLAUSE_REDUCTION_MERGE (stmt))
cp_walk_tree (&OMP_CLAUSE_REDUCTION_MERGE (stmt),
cp_genericize_r, data, NULL);
}
break;
default:
break;
}
else if (IS_TYPE_OR_DECL_P (stmt))
*walk_subtrees = 0;
/* Due to the way voidify_wrapper_expr is written, we don't get a chance
to lower this construct before scanning it, so we need to lower these
before doing anything else. */
else if (TREE_CODE (stmt) == CLEANUP_STMT)
*stmt_p = build2_loc (EXPR_LOCATION (stmt),
CLEANUP_EH_ONLY (stmt) ? TRY_CATCH_EXPR
: TRY_FINALLY_EXPR,
void_type_node,
CLEANUP_BODY (stmt),
CLEANUP_EXPR (stmt));
else if (TREE_CODE (stmt) == IF_STMT)
{
genericize_if_stmt (stmt_p);
/* *stmt_p has changed, tail recurse to handle it again. */
return cp_genericize_r (stmt_p, walk_subtrees, data);
}
/* COND_EXPR might have incompatible types in branches if one or both
arms are bitfields. Fix it up now. */
else if (TREE_CODE (stmt) == COND_EXPR)
{
tree type_left
= (TREE_OPERAND (stmt, 1)
? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 1))
: NULL_TREE);
tree type_right
= (TREE_OPERAND (stmt, 2)
? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 2))
: NULL_TREE);
if (type_left
&& !useless_type_conversion_p (TREE_TYPE (stmt),
TREE_TYPE (TREE_OPERAND (stmt, 1))))
{
TREE_OPERAND (stmt, 1)
= fold_convert (type_left, TREE_OPERAND (stmt, 1));
gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
type_left));
}
if (type_right
&& !useless_type_conversion_p (TREE_TYPE (stmt),
TREE_TYPE (TREE_OPERAND (stmt, 2))))
{
TREE_OPERAND (stmt, 2)
= fold_convert (type_right, TREE_OPERAND (stmt, 2));
gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
type_right));
}
}
else if (TREE_CODE (stmt) == BIND_EXPR)
{
if (__builtin_expect (wtd->omp_ctx != NULL, 0))
{
tree decl;
for (decl = BIND_EXPR_VARS (stmt); decl; decl = DECL_CHAIN (decl))
if (VAR_P (decl)
&& !DECL_EXTERNAL (decl)
&& omp_var_to_track (decl))
{
splay_tree_node n
= splay_tree_lookup (wtd->omp_ctx->variables,
(splay_tree_key) decl);
if (n == NULL)
splay_tree_insert (wtd->omp_ctx->variables,
(splay_tree_key) decl,
TREE_STATIC (decl)
? OMP_CLAUSE_DEFAULT_SHARED
: OMP_CLAUSE_DEFAULT_PRIVATE);
}
}
if (flag_sanitize
& (SANITIZE_NULL | SANITIZE_ALIGNMENT | SANITIZE_VPTR))
{
/* The point here is to not sanitize static initializers. */
bool no_sanitize_p = wtd->no_sanitize_p;
wtd->no_sanitize_p = true;
for (tree decl = BIND_EXPR_VARS (stmt);
decl;
decl = DECL_CHAIN (decl))
if (VAR_P (decl)
&& TREE_STATIC (decl)
&& DECL_INITIAL (decl))
cp_walk_tree (&DECL_INITIAL (decl), cp_genericize_r, data, NULL);
wtd->no_sanitize_p = no_sanitize_p;
}
wtd->bind_expr_stack.safe_push (stmt);
cp_walk_tree (&BIND_EXPR_BODY (stmt),
cp_genericize_r, data, NULL);
wtd->bind_expr_stack.pop ();
}
else if (TREE_CODE (stmt) == USING_STMT)
{
tree block = NULL_TREE;
/* Get the innermost inclosing GIMPLE_BIND that has a non NULL
BLOCK, and append an IMPORTED_DECL to its
BLOCK_VARS chained list. */
if (wtd->bind_expr_stack.exists ())
{
int i;
for (i = wtd->bind_expr_stack.length () - 1; i >= 0; i--)
if ((block = BIND_EXPR_BLOCK (wtd->bind_expr_stack[i])))
break;
}
if (block)
{
tree using_directive;
gcc_assert (TREE_OPERAND (stmt, 0));
using_directive = make_node (IMPORTED_DECL);
TREE_TYPE (using_directive) = void_type_node;
IMPORTED_DECL_ASSOCIATED_DECL (using_directive)
= TREE_OPERAND (stmt, 0);
DECL_CHAIN (using_directive) = BLOCK_VARS (block);
BLOCK_VARS (block) = using_directive;
}
/* The USING_STMT won't appear in GENERIC. */
*stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == DECL_EXPR
&& TREE_CODE (DECL_EXPR_DECL (stmt)) == USING_DECL)
{
/* Using decls inside DECL_EXPRs are just dropped on the floor. */
*stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
*walk_subtrees = 0;
}
else if (TREE_CODE (stmt) == DECL_EXPR)
{
tree d = DECL_EXPR_DECL (stmt);
if (TREE_CODE (d) == VAR_DECL)
gcc_assert (CP_DECL_THREAD_LOCAL_P (d) == DECL_THREAD_LOCAL_P (d));
}
else if (TREE_CODE (stmt) == OMP_PARALLEL || TREE_CODE (stmt) == OMP_TASK)
{
struct cp_genericize_omp_taskreg omp_ctx;
tree c, decl;
splay_tree_node n;
*walk_subtrees = 0;
cp_walk_tree (&OMP_CLAUSES (stmt), cp_genericize_r, data, NULL);
omp_ctx.is_parallel = TREE_CODE (stmt) == OMP_PARALLEL;
omp_ctx.default_shared = omp_ctx.is_parallel;
omp_ctx.outer = wtd->omp_ctx;
omp_ctx.variables = splay_tree_new (splay_tree_compare_decl_uid, 0, 0);
wtd->omp_ctx = &omp_ctx;
for (c = OMP_CLAUSES (stmt); c; c = OMP_CLAUSE_CHAIN (c))
switch (OMP_CLAUSE_CODE (c))
{
case OMP_CLAUSE_SHARED:
case OMP_CLAUSE_PRIVATE:
case OMP_CLAUSE_FIRSTPRIVATE:
case OMP_CLAUSE_LASTPRIVATE:
decl = OMP_CLAUSE_DECL (c);
if (decl == error_mark_node || !omp_var_to_track (decl))
break;
n = splay_tree_lookup (omp_ctx.variables, (splay_tree_key) decl);
if (n != NULL)
break;
splay_tree_insert (omp_ctx.variables, (splay_tree_key) decl,
OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED
? OMP_CLAUSE_DEFAULT_SHARED
: OMP_CLAUSE_DEFAULT_PRIVATE);
if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_PRIVATE
&& omp_ctx.outer)
omp_cxx_notice_variable (omp_ctx.outer, decl);
break;
case OMP_CLAUSE_DEFAULT:
if (OMP_CLAUSE_DEFAULT_KIND (c) == OMP_CLAUSE_DEFAULT_SHARED)
omp_ctx.default_shared = true;
default:
break;
}
cp_walk_tree (&OMP_BODY (stmt), cp_genericize_r, data, NULL);
wtd->omp_ctx = omp_ctx.outer;
splay_tree_delete (omp_ctx.variables);
}
else if (TREE_CODE (stmt) == TRY_BLOCK)
{
*walk_subtrees = 0;
tree try_block = wtd->try_block;
wtd->try_block = stmt;
cp_walk_tree (&TRY_STMTS (stmt), cp_genericize_r, data, NULL);
wtd->try_block = try_block;
cp_walk_tree (&TRY_HANDLERS (stmt), cp_genericize_r, data, NULL);
}
else if (TREE_CODE (stmt) == MUST_NOT_THROW_EXPR)
{
/* MUST_NOT_THROW_COND might be something else with TM. */
if (MUST_NOT_THROW_COND (stmt) == NULL_TREE)
{
*walk_subtrees = 0;
tree try_block = wtd->try_block;
wtd->try_block = stmt;
cp_walk_tree (&TREE_OPERAND (stmt, 0), cp_genericize_r, data, NULL);
wtd->try_block = try_block;
}
}
else if (TREE_CODE (stmt) == THROW_EXPR)
{
location_t loc = location_of (stmt);
if (TREE_NO_WARNING (stmt))
/* Never mind. */;
else if (wtd->try_block)
{
if (TREE_CODE (wtd->try_block) == MUST_NOT_THROW_EXPR
&& warning_at (loc, OPT_Wterminate,
"throw will always call terminate()")
&& cxx_dialect >= cxx11
&& DECL_DESTRUCTOR_P (current_function_decl))
inform (loc, "in C++11 destructors default to noexcept");
}
else
{
if (warn_cxx11_compat && cxx_dialect < cxx11
&& DECL_DESTRUCTOR_P (current_function_decl)
&& (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl))
== NULL_TREE)
&& (get_defaulted_eh_spec (current_function_decl)
== empty_except_spec))
warning_at (loc, OPT_Wc__11_compat,
"in C++11 this throw will terminate because "
"destructors default to noexcept");
}
}
else if (TREE_CODE (stmt) == CONVERT_EXPR)
gcc_assert (!CONVERT_EXPR_VBASE_PATH (stmt));
else if (TREE_CODE (stmt) == FOR_STMT)
genericize_for_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == WHILE_STMT)
genericize_while_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == DO_STMT)
genericize_do_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == SWITCH_STMT)
genericize_switch_stmt (stmt_p, walk_subtrees, data);
else if (TREE_CODE (stmt) == CONTINUE_STMT)
genericize_continue_stmt (stmt_p);
else if (TREE_CODE (stmt) == BREAK_STMT)
genericize_break_stmt (stmt_p);
else if (TREE_CODE (stmt) == OMP_FOR
|| TREE_CODE (stmt) == OMP_SIMD
|| TREE_CODE (stmt) == OMP_DISTRIBUTE
|| TREE_CODE (stmt) == OMP_TASKLOOP)
genericize_omp_for_stmt (stmt_p, walk_subtrees, data);
else if ((flag_sanitize
& (SANITIZE_NULL | SANITIZE_ALIGNMENT | SANITIZE_VPTR))
&& !wtd->no_sanitize_p)
{
if ((flag_sanitize & (SANITIZE_NULL | SANITIZE_ALIGNMENT))
&& TREE_CODE (stmt) == NOP_EXPR
&& TREE_CODE (TREE_TYPE (stmt)) == REFERENCE_TYPE)
ubsan_maybe_instrument_reference (stmt);
else if (TREE_CODE (stmt) == CALL_EXPR)
{
tree fn = CALL_EXPR_FN (stmt);
if (fn != NULL_TREE
&& !error_operand_p (fn)
&& POINTER_TYPE_P (TREE_TYPE (fn))
&& TREE_CODE (TREE_TYPE (TREE_TYPE (fn))) == METHOD_TYPE)
{
bool is_ctor
= TREE_CODE (fn) == ADDR_EXPR
&& TREE_CODE (TREE_OPERAND (fn, 0)) == FUNCTION_DECL
&& DECL_CONSTRUCTOR_P (TREE_OPERAND (fn, 0));
if (flag_sanitize & (SANITIZE_NULL | SANITIZE_ALIGNMENT))
ubsan_maybe_instrument_member_call (stmt, is_ctor);
if ((flag_sanitize & SANITIZE_VPTR) && !is_ctor)
cp_ubsan_maybe_instrument_member_call (stmt);
}
}
}
p_set->add (*stmt_p);
return NULL;
}
/* Lower C++ front end trees to GENERIC in T_P. */
static void
cp_genericize_tree (tree* t_p)
{
struct cp_genericize_data wtd;
wtd.p_set = new hash_set<tree>;
wtd.bind_expr_stack.create (0);
wtd.omp_ctx = NULL;
wtd.try_block = NULL_TREE;
wtd.no_sanitize_p = false;
cp_walk_tree (t_p, cp_genericize_r, &wtd, NULL);
delete wtd.p_set;
wtd.bind_expr_stack.release ();
if (flag_sanitize & SANITIZE_VPTR)
cp_ubsan_instrument_member_accesses (t_p);
}
/* If a function that should end with a return in non-void
function doesn't obviously end with return, add ubsan
instrumentation code to verify it at runtime. */
static void
cp_ubsan_maybe_instrument_return (tree fndecl)
{
if (VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fndecl)))
|| DECL_CONSTRUCTOR_P (fndecl)
|| DECL_DESTRUCTOR_P (fndecl)
|| !targetm.warn_func_return (fndecl))
return;
tree t = DECL_SAVED_TREE (fndecl);
while (t)
{
switch (TREE_CODE (t))
{
case BIND_EXPR:
t = BIND_EXPR_BODY (t);
continue;
case TRY_FINALLY_EXPR:
t = TREE_OPERAND (t, 0);
continue;
case STATEMENT_LIST:
{
tree_stmt_iterator i = tsi_last (t);
if (!tsi_end_p (i))
{
t = tsi_stmt (i);
continue;
}
}
break;
case RETURN_EXPR:
return;
default:
break;
}
break;
}
if (t == NULL_TREE)
return;
t = DECL_SAVED_TREE (fndecl);
if (TREE_CODE (t) == BIND_EXPR
&& TREE_CODE (BIND_EXPR_BODY (t)) == STATEMENT_LIST)
{
tree_stmt_iterator i = tsi_last (BIND_EXPR_BODY (t));
t = ubsan_instrument_return (DECL_SOURCE_LOCATION (fndecl));
tsi_link_after (&i, t, TSI_NEW_STMT);
}
}
void
cp_genericize (tree fndecl)
{
tree t;
/* Fix up the types of parms passed by invisible reference. */
for (t = DECL_ARGUMENTS (fndecl); t; t = DECL_CHAIN (t))
if (TREE_ADDRESSABLE (TREE_TYPE (t)))
{
/* If a function's arguments are copied to create a thunk,
then DECL_BY_REFERENCE will be set -- but the type of the
argument will be a pointer type, so we will never get
here. */
gcc_assert (!DECL_BY_REFERENCE (t));
gcc_assert (DECL_ARG_TYPE (t) != TREE_TYPE (t));
TREE_TYPE (t) = DECL_ARG_TYPE (t);
DECL_BY_REFERENCE (t) = 1;
TREE_ADDRESSABLE (t) = 0;
relayout_decl (t);
}
/* Do the same for the return value. */
if (TREE_ADDRESSABLE (TREE_TYPE (DECL_RESULT (fndecl))))
{
t = DECL_RESULT (fndecl);
TREE_TYPE (t) = build_reference_type (TREE_TYPE (t));
DECL_BY_REFERENCE (t) = 1;
TREE_ADDRESSABLE (t) = 0;
relayout_decl (t);
if (DECL_NAME (t))
{
/* Adjust DECL_VALUE_EXPR of the original var. */
tree outer = outer_curly_brace_block (current_function_decl);
tree var;
if (outer)
for (var = BLOCK_VARS (outer); var; var = DECL_CHAIN (var))
if (DECL_NAME (t) == DECL_NAME (var)
&& DECL_HAS_VALUE_EXPR_P (var)
&& DECL_VALUE_EXPR (var) == t)
{
tree val = convert_from_reference (t);
SET_DECL_VALUE_EXPR (var, val);
break;
}
}
}
/* If we're a clone, the body is already GIMPLE. */
if (DECL_CLONED_FUNCTION_P (fndecl))
return;
/* Expand all the array notations here. */
if (flag_cilkplus
&& contains_array_notation_expr (DECL_SAVED_TREE (fndecl)))
DECL_SAVED_TREE (fndecl) =
expand_array_notation_exprs (DECL_SAVED_TREE (fndecl));
/* We do want to see every occurrence of the parms, so we can't just use
walk_tree's hash functionality. */
cp_genericize_tree (&DECL_SAVED_TREE (fndecl));
if (flag_sanitize & SANITIZE_RETURN
&& do_ubsan_in_current_function ())
cp_ubsan_maybe_instrument_return (fndecl);
/* Do everything else. */
c_genericize (fndecl);
gcc_assert (bc_label[bc_break] == NULL);
gcc_assert (bc_label[bc_continue] == NULL);
}
/* Build code to apply FN to each member of ARG1 and ARG2. FN may be
NULL if there is in fact nothing to do. ARG2 may be null if FN
actually only takes one argument. */
static tree
cxx_omp_clause_apply_fn (tree fn, tree arg1, tree arg2)
{
tree defparm, parm, t;
int i = 0;
int nargs;
tree *argarray;
if (fn == NULL)
return NULL;
nargs = list_length (DECL_ARGUMENTS (fn));
argarray = XALLOCAVEC (tree, nargs);
defparm = TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (fn)));
if (arg2)
defparm = TREE_CHAIN (defparm);
if (TREE_CODE (TREE_TYPE (arg1)) == ARRAY_TYPE)
{
tree inner_type = TREE_TYPE (arg1);
tree start1, end1, p1;
tree start2 = NULL, p2 = NULL;
tree ret = NULL, lab;
start1 = arg1;
start2 = arg2;
do
{
inner_type = TREE_TYPE (inner_type);
start1 = build4 (ARRAY_REF, inner_type, start1,
size_zero_node, NULL, NULL);
if (arg2)
start2 = build4 (ARRAY_REF, inner_type, start2,
size_zero_node, NULL, NULL);
}
while (TREE_CODE (inner_type) == ARRAY_TYPE);
start1 = build_fold_addr_expr_loc (input_location, start1);
if (arg2)
start2 = build_fold_addr_expr_loc (input_location, start2);
end1 = TYPE_SIZE_UNIT (TREE_TYPE (arg1));
end1 = fold_build_pointer_plus (start1, end1);
p1 = create_tmp_var (TREE_TYPE (start1));
t = build2 (MODIFY_EXPR, TREE_TYPE (p1), p1, start1);
append_to_statement_list (t, &ret);
if (arg2)
{
p2 = create_tmp_var (TREE_TYPE (start2));
t = build2 (MODIFY_EXPR, TREE_TYPE (p2), p2, start2);
append_to_statement_list (t, &ret);
}
lab = create_artificial_label (input_location);
t = build1 (LABEL_EXPR, void_type_node, lab);
append_to_statement_list (t, &ret);
argarray[i++] = p1;
if (arg2)
argarray[i++] = p2;
/* Handle default arguments. */
for (parm = defparm; parm && parm != void_list_node;
parm = TREE_CHAIN (parm), i++)
argarray[i] = convert_default_arg (TREE_VALUE (parm),
TREE_PURPOSE (parm), fn, i,
tf_warning_or_error);
t = build_call_a (fn, i, argarray);
t = fold_convert (void_type_node, t);
t = fold_build_cleanup_point_expr (TREE_TYPE (t), t);
append_to_statement_list (t, &ret);
t = fold_build_pointer_plus (p1, TYPE_SIZE_UNIT (inner_type));
t = build2 (MODIFY_EXPR, TREE_TYPE (p1), p1, t);
append_to_statement_list (t, &ret);
if (arg2)
{
t = fold_build_pointer_plus (p2, TYPE_SIZE_UNIT (inner_type));
t = build2 (MODIFY_EXPR, TREE_TYPE (p2), p2, t);
append_to_statement_list (t, &ret);
}
t = build2 (NE_EXPR, boolean_type_node, p1, end1);
t = build3 (COND_EXPR, void_type_node, t, build_and_jump (&lab), NULL);
append_to_statement_list (t, &ret);
return ret;
}
else
{
argarray[i++] = build_fold_addr_expr_loc (input_location, arg1);
if (arg2)
argarray[i++] = build_fold_addr_expr_loc (input_location, arg2);
/* Handle default arguments. */
for (parm = defparm; parm && parm != void_list_node;
parm = TREE_CHAIN (parm), i++)
argarray[i] = convert_default_arg (TREE_VALUE (parm),
TREE_PURPOSE (parm),
fn, i, tf_warning_or_error);
t = build_call_a (fn, i, argarray);
t = fold_convert (void_type_node, t);
return fold_build_cleanup_point_expr (TREE_TYPE (t), t);
}
}
/* Return code to initialize DECL with its default constructor, or
NULL if there's nothing to do. */
tree
cxx_omp_clause_default_ctor (tree clause, tree decl, tree /*outer*/)
{
tree info = CP_OMP_CLAUSE_INFO (clause);
tree ret = NULL;
if (info)
ret = cxx_omp_clause_apply_fn (TREE_VEC_ELT (info, 0), decl, NULL);
return ret;
}
/* Return code to initialize DST with a copy constructor from SRC. */
tree
cxx_omp_clause_copy_ctor (tree clause, tree dst, tree src)
{
tree info = CP_OMP_CLAUSE_INFO (clause);
tree ret = NULL;
if (info)
ret = cxx_omp_clause_apply_fn (TREE_VEC_ELT (info, 0), dst, src);
if (ret == NULL)
ret = build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
return ret;
}
/* Similarly, except use an assignment operator instead. */
tree
cxx_omp_clause_assign_op (tree clause, tree dst, tree src)
{
tree info = CP_OMP_CLAUSE_INFO (clause);
tree ret = NULL;
if (info)
ret = cxx_omp_clause_apply_fn (TREE_VEC_ELT (info, 2), dst, src);
if (ret == NULL)
ret = build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
return ret;
}
/* Return code to destroy DECL. */
tree
cxx_omp_clause_dtor (tree clause, tree decl)
{
tree info = CP_OMP_CLAUSE_INFO (clause);
tree ret = NULL;
if (info)
ret = cxx_omp_clause_apply_fn (TREE_VEC_ELT (info, 1), decl, NULL);
return ret;
}
/* True if OpenMP should privatize what this DECL points to rather
than the DECL itself. */
bool
cxx_omp_privatize_by_reference (const_tree decl)
{
return (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE
|| is_invisiref_parm (decl));
}
/* Return true if DECL is const qualified var having no mutable member. */
bool
cxx_omp_const_qual_no_mutable (tree decl)
{
tree type = TREE_TYPE (decl);
if (TREE_CODE (type) == REFERENCE_TYPE)
{
if (!is_invisiref_parm (decl))
return false;
type = TREE_TYPE (type);
if (TREE_CODE (decl) == RESULT_DECL && DECL_NAME (decl))
{
/* NVR doesn't preserve const qualification of the
variable's type. */
tree outer = outer_curly_brace_block (current_function_decl);
tree var;
if (outer)
for (var = BLOCK_VARS (outer); var; var = DECL_CHAIN (var))
if (DECL_NAME (decl) == DECL_NAME (var)
&& (TYPE_MAIN_VARIANT (type)
== TYPE_MAIN_VARIANT (TREE_TYPE (var))))
{
if (TYPE_READONLY (TREE_TYPE (var)))
type = TREE_TYPE (var);
break;
}
}
}
if (type == error_mark_node)
return false;
/* Variables with const-qualified type having no mutable member
are predetermined shared. */
if (TYPE_READONLY (type) && !cp_has_mutable_p (type))
return true;
return false;
}
/* True if OpenMP sharing attribute of DECL is predetermined. */
enum omp_clause_default_kind
cxx_omp_predetermined_sharing (tree decl)
{
/* Static data members are predetermined shared. */
if (TREE_STATIC (decl))
{
tree ctx = CP_DECL_CONTEXT (decl);
if (TYPE_P (ctx) && MAYBE_CLASS_TYPE_P (ctx))
return OMP_CLAUSE_DEFAULT_SHARED;
}
/* Const qualified vars having no mutable member are predetermined
shared. */
if (cxx_omp_const_qual_no_mutable (decl))
return OMP_CLAUSE_DEFAULT_SHARED;
return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
}
/* Finalize an implicitly determined clause. */
void
cxx_omp_finish_clause (tree c, gimple_seq *)
{
tree decl, inner_type;
bool make_shared = false;
if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_FIRSTPRIVATE)
return;
decl = OMP_CLAUSE_DECL (c);
decl = require_complete_type (decl);
inner_type = TREE_TYPE (decl);
if (decl == error_mark_node)
make_shared = true;
else if (TREE_CODE (TREE_TYPE (decl)) == REFERENCE_TYPE)
inner_type = TREE_TYPE (inner_type);
/* We're interested in the base element, not arrays. */
while (TREE_CODE (inner_type) == ARRAY_TYPE)
inner_type = TREE_TYPE (inner_type);
/* Check for special function availability by building a call to one.
Save the results, because later we won't be in the right context
for making these queries. */
if (!make_shared
&& CLASS_TYPE_P (inner_type)
&& cxx_omp_create_clause_info (c, inner_type, false, true, false, true))
make_shared = true;
if (make_shared)
OMP_CLAUSE_CODE (c) = OMP_CLAUSE_SHARED;
}
/* Return true if DECL's DECL_VALUE_EXPR (if any) should be
disregarded in OpenMP construct, because it is going to be
remapped during OpenMP lowering. SHARED is true if DECL
is going to be shared, false if it is going to be privatized. */
bool
cxx_omp_disregard_value_expr (tree decl, bool shared)
{
return !shared
&& VAR_P (decl)
&& DECL_HAS_VALUE_EXPR_P (decl)
&& DECL_ARTIFICIAL (decl)
&& DECL_LANG_SPECIFIC (decl)
&& DECL_OMP_PRIVATIZED_MEMBER (decl);
}
/* Callback for walk_tree, looking for LABEL_EXPR. Return *TP if it is
a LABEL_EXPR; otherwise return NULL_TREE. Do not check the subtrees
of GOTO_EXPR. */
static tree
contains_label_1 (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
{
switch (TREE_CODE (*tp))
{
case LABEL_EXPR:
return *tp;
case GOTO_EXPR:
*walk_subtrees = 0;
/* ... fall through ... */
default:
return NULL_TREE;
}
}
/* Return whether the sub-tree ST contains a label which is accessible from
outside the sub-tree. */
static bool
contains_label_p (tree st)
{
return
walk_tree_without_duplicates (&st, contains_label_1 , NULL) != NULL_TREE;
}
/* Perform folding on expression X. */
tree
cp_fully_fold (tree x)
{
return cp_fold (x);
}
/* Fold expression X which is used as an rvalue if RVAL is true. */
static tree
cp_fold_maybe_rvalue (tree x, bool rval)
{
if (rval && DECL_P (x))
{
tree v = decl_constant_value (x);
if (v != error_mark_node)
x = v;
}
return cp_fold (x);
}
/* Fold expression X which is used as an rvalue. */
static tree
cp_fold_rvalue (tree x)
{
return cp_fold_maybe_rvalue (x, true);
}
/* c-common interface to cp_fold. If IN_INIT, this is in a static initializer
and certain changes are made to the folding done. Or should be (FIXME). We
never touch maybe_const, as it is only used for the C front-end
C_MAYBE_CONST_EXPR. */
tree
c_fully_fold (tree x, bool /*in_init*/, bool */*maybe_const*/)
{
/* c_fully_fold is only used on rvalues, and we need to fold CONST_DECL to
INTEGER_CST. */
return cp_fold_rvalue (x);
}
static GTY((cache, deletable)) cache_map fold_cache;
/* This function tries to fold an expression X.
To avoid combinatorial explosion, folding results are kept in fold_cache.
If we are processing a template or X is invalid, we don't fold at all.
For performance reasons we don't cache expressions representing a
declaration or constant.
Function returns X or its folded variant. */
static tree
cp_fold (tree x)
{
tree op0, op1, op2, op3;
tree org_x = x, r = NULL_TREE;
enum tree_code code;
location_t loc;
bool rval_ops = true;
if (!x || x == error_mark_node)
return x;
if (processing_template_decl
|| (EXPR_P (x) && (!TREE_TYPE (x) || TREE_TYPE (x) == error_mark_node)))
return x;
/* Don't bother to cache DECLs or constants. */
if (DECL_P (x) || CONSTANT_CLASS_P (x))
return x;
if (tree cached = fold_cache.get (x))
return cached;
code = TREE_CODE (x);
switch (code)
{
case SIZEOF_EXPR:
x = fold_sizeof_expr (x);
break;
case VIEW_CONVERT_EXPR:
rval_ops = false;
case CONVERT_EXPR:
case NOP_EXPR:
case NON_LVALUE_EXPR:
if (VOID_TYPE_P (TREE_TYPE (x)))
return x;
if (!TREE_OPERAND (x, 0)
|| TREE_CODE (TREE_OPERAND (x, 0)) == NON_LVALUE_EXPR)
return x;
loc = EXPR_LOCATION (x);
op0 = TREE_OPERAND (x, 0);
if (TREE_CODE (x) == NOP_EXPR
&& TREE_OVERFLOW_P (op0)
&& TREE_TYPE (x) == TREE_TYPE (op0))
return x;
op0 = cp_fold_maybe_rvalue (op0, rval_ops);
if (op0 != TREE_OPERAND (x, 0))
x = fold_build1_loc (loc, code, TREE_TYPE (x), op0);
else
x = fold (x);
/* Conversion of an out-of-range value has implementation-defined
behavior; the language considers it different from arithmetic
overflow, which is undefined. */
if (TREE_CODE (op0) == INTEGER_CST
&& TREE_OVERFLOW_P (x) && !TREE_OVERFLOW_P (op0))
TREE_OVERFLOW (x) = false;
break;
case ADDR_EXPR:
case REALPART_EXPR:
case IMAGPART_EXPR:
rval_ops = false;
case CONJ_EXPR:
case FIX_TRUNC_EXPR:
case FLOAT_EXPR:
case NEGATE_EXPR:
case ABS_EXPR:
case BIT_NOT_EXPR:
case TRUTH_NOT_EXPR:
case FIXED_CONVERT_EXPR:
case UNARY_PLUS_EXPR:
case INDIRECT_REF:
loc = EXPR_LOCATION (x);
op0 = cp_fold_maybe_rvalue (TREE_OPERAND (x, 0), rval_ops);
if (op0 != TREE_OPERAND (x, 0))
x = fold_build1_loc (loc, code, TREE_TYPE (x), op0);
else
x = fold (x);
gcc_assert (TREE_CODE (x) != COND_EXPR
|| !VOID_TYPE_P (TREE_TYPE (TREE_OPERAND (x, 0))));
break;
case POSTDECREMENT_EXPR:
case POSTINCREMENT_EXPR:
case INIT_EXPR:
loc = EXPR_LOCATION (x);
op0 = cp_fold (TREE_OPERAND (x, 0));
op1 = cp_fold_rvalue (TREE_OPERAND (x, 1));
if (TREE_OPERAND (x, 0) != op0 || TREE_OPERAND (x, 1) != op1)
x = build2_loc (loc, code, TREE_TYPE (x), op0, op1);
break;
case PREDECREMENT_EXPR:
case PREINCREMENT_EXPR:
case COMPOUND_EXPR:
case MODIFY_EXPR:
rval_ops = false;
case POINTER_PLUS_EXPR:
case PLUS_EXPR:
case MINUS_EXPR:
case MULT_EXPR:
case TRUNC_DIV_EXPR:
case CEIL_DIV_EXPR:
case FLOOR_DIV_EXPR:
case ROUND_DIV_EXPR:
case TRUNC_MOD_EXPR:
case CEIL_MOD_EXPR:
case ROUND_MOD_EXPR:
case RDIV_EXPR:
case EXACT_DIV_EXPR:
case MIN_EXPR:
case MAX_EXPR:
case LSHIFT_EXPR:
case RSHIFT_EXPR:
case LROTATE_EXPR:
case RROTATE_EXPR:
case BIT_AND_EXPR:
case BIT_IOR_EXPR:
case BIT_XOR_EXPR:
case TRUTH_AND_EXPR:
case TRUTH_ANDIF_EXPR:
case TRUTH_OR_EXPR:
case TRUTH_ORIF_EXPR:
case TRUTH_XOR_EXPR:
case LT_EXPR: case LE_EXPR:
case GT_EXPR: case GE_EXPR:
case EQ_EXPR: case NE_EXPR:
case UNORDERED_EXPR: case ORDERED_EXPR:
case UNLT_EXPR: case UNLE_EXPR:
case UNGT_EXPR: case UNGE_EXPR:
case UNEQ_EXPR: case LTGT_EXPR:
case RANGE_EXPR: case COMPLEX_EXPR:
loc = EXPR_LOCATION (x);
op0 = cp_fold_maybe_rvalue (TREE_OPERAND (x, 0), rval_ops);
op1 = cp_fold_rvalue (TREE_OPERAND (x, 1));
if ((code == COMPOUND_EXPR || code == MODIFY_EXPR)
&& ((op1 && TREE_SIDE_EFFECTS (op1))
|| (op0 && TREE_SIDE_EFFECTS (op0))))
{
if (op0 != TREE_OPERAND (x, 0) || op1 != TREE_OPERAND (x, 1))
x = build2_loc (loc, code, TREE_TYPE (x), op0, op1);
break;
}
if (TREE_CODE (x) == COMPOUND_EXPR && !op0)
op0 = build_empty_stmt (loc);
if (op0 != TREE_OPERAND (x, 0) || op1 != TREE_OPERAND (x, 1))
x = fold_build2_loc (loc, code, TREE_TYPE (x), op0, op1);
else
x = fold (x);
if (TREE_CODE (x) == COMPOUND_EXPR && TREE_OPERAND (x, 0) == NULL_TREE
&& TREE_OPERAND (x, 1))
return TREE_OPERAND (x, 1);
break;
case VEC_COND_EXPR:
case COND_EXPR:
loc = EXPR_LOCATION (x);
op0 = cp_fold_rvalue (TREE_OPERAND (x, 0));
if (TREE_SIDE_EFFECTS (op0))
break;
op1 = cp_fold (TREE_OPERAND (x, 1));
op2 = cp_fold (TREE_OPERAND (x, 2));
if (TREE_CODE (op0) == INTEGER_CST)
{
tree un;
if (integer_zerop (op0))
{
un = op1;
r = op2;
}
else
{
un = op2;
r = op1;
}
if ((!TREE_SIDE_EFFECTS (un) || !contains_label_p (un))
&& (! VOID_TYPE_P (TREE_TYPE (r)) || VOID_TYPE_P (x)))
{
if (CAN_HAVE_LOCATION_P (r)
&& EXPR_LOCATION (r) != loc
&& !(TREE_CODE (r) == SAVE_EXPR
|| TREE_CODE (r) == TARGET_EXPR
|| TREE_CODE (r) == BIND_EXPR))
{
r = copy_node (r);
SET_EXPR_LOCATION (r, loc);
}
x = r;
}
break;
}
if (VOID_TYPE_P (TREE_TYPE (x)))
break;
x = build3_loc (loc, code, TREE_TYPE (x), op0, op1, op2);
if (code != COND_EXPR)
x = fold (x);
break;
case CALL_EXPR:
{
int i, m, sv = optimize, nw = sv, changed = 0;
tree callee = get_callee_fndecl (x);
/* Some built-in function calls will be evaluated at compile-time in
fold (). Set optimize to 1 when folding __builtin_constant_p inside
a constexpr function so that fold_builtin_1 doesn't fold it to 0. */
if (callee && DECL_BUILT_IN (callee) && !optimize
&& DECL_IS_BUILTIN_CONSTANT_P (callee)
&& current_function_decl
&& DECL_DECLARED_CONSTEXPR_P (current_function_decl))
nw = 1;
x = copy_node (x);
m = call_expr_nargs (x);
for (i = 0; i < m; i++)
{
r = cp_fold (CALL_EXPR_ARG (x, i));
if (r != CALL_EXPR_ARG (x, i))
changed = 1;
CALL_EXPR_ARG (x, i) = r;
}
optimize = nw;
r = fold (x);
optimize = sv;
if (TREE_CODE (r) != CALL_EXPR)
{
x = cp_fold (r);
break;
}
optimize = nw;
/* Invoke maybe_constant_value for functions declared
constexpr and not called with AGGR_INIT_EXPRs.
TODO:
Do constexpr expansion of expressions where the call itself is not
constant, but the call followed by an INDIRECT_REF is. */
if (callee && DECL_DECLARED_CONSTEXPR_P (callee))
r = maybe_constant_value (x);
optimize = sv;
if (TREE_CODE (r) != CALL_EXPR)
{
x = r;
break;
}
if (!changed)
x = org_x;
break;
}
case CONSTRUCTOR:
{
unsigned i;
constructor_elt *p;
vec<constructor_elt, va_gc> *elts = CONSTRUCTOR_ELTS (x);
FOR_EACH_VEC_SAFE_ELT (elts, i, p)
p->value = cp_fold (p->value);
break;
}
case TREE_VEC:
{
bool changed = false;
vec<tree, va_gc> *vec = make_tree_vector ();
int i, n = TREE_VEC_LENGTH (x);
vec_safe_reserve (vec, n);
for (i = 0; i < n; i++)
{
tree op = cp_fold (TREE_VEC_ELT (x, i));
vec->quick_push (op);
if (op != TREE_VEC_ELT (x, i))
changed = true;
}
if (changed)
{
r = copy_node (x);
for (i = 0; i < n; i++)
TREE_VEC_ELT (r, i) = (*vec)[i];
x = r;
}
release_tree_vector (vec);
}
break;
case ARRAY_REF:
case ARRAY_RANGE_REF:
loc = EXPR_LOCATION (x);
op0 = cp_fold (TREE_OPERAND (x, 0));
op1 = cp_fold (TREE_OPERAND (x, 1));
op2 = cp_fold (TREE_OPERAND (x, 2));
op3 = cp_fold (TREE_OPERAND (x, 3));
if (op0 != TREE_OPERAND (x, 0) || op1 != TREE_OPERAND (x, 1)
|| op2 != TREE_OPERAND (x, 2) || op3 != TREE_OPERAND (x, 3))
x = build4_loc (loc, code, TREE_TYPE (x), op0, op1, op2, op3);
x = fold (x);
break;
default:
return org_x;
}
fold_cache.put (org_x, x);
/* Prevent that we try to fold an already folded result again. */
if (x != org_x)
fold_cache.put (x, x);
return x;
}
#include "gt-cp-cp-gimplify.h"
|