aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.9/gcc/gimplify.c
blob: bcf6f091201508776b094a65d4e7c89b3df9a092 (plain)
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
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
8932
8933
8934
8935
8936
8937
8938
8939
8940
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969
8970
8971
8972
8973
8974
8975
8976
8977
8978
8979
8980
8981
8982
8983
8984
8985
8986
8987
8988
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
9027
9028
9029
9030
9031
9032
9033
9034
9035
9036
9037
9038
9039
9040
9041
9042
9043
9044
9045
9046
9047
9048
9049
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075
9076
9077
9078
9079
9080
9081
9082
9083
9084
9085
9086
9087
9088
9089
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
9100
9101
9102
9103
9104
9105
9106
9107
9108
9109
/* Tree lowering pass.  This pass converts the GENERIC functions-as-trees
   tree representation into the GIMPLE form.
   Copyright (C) 2002-2014 Free Software Foundation, Inc.
   Major work done by Sebastian Pop <s.pop@laposte.net>,
   Diego Novillo <dnovillo@redhat.com> and 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 "tree.h"
#include "expr.h"
#include "pointer-set.h"
#include "hash-table.h"
#include "basic-block.h"
#include "tree-ssa-alias.h"
#include "internal-fn.h"
#include "gimple-fold.h"
#include "tree-eh.h"
#include "gimple-expr.h"
#include "is-a.h"
#include "gimple.h"
#include "gimplify.h"
#include "gimple-iterator.h"
#include "stringpool.h"
#include "calls.h"
#include "varasm.h"
#include "stor-layout.h"
#include "stmt.h"
#include "print-tree.h"
#include "tree-iterator.h"
#include "tree-inline.h"
#include "tree-pretty-print.h"
#include "langhooks.h"
#include "bitmap.h"
#include "gimple-ssa.h"
#include "cgraph.h"
#include "tree-cfg.h"
#include "tree-ssanames.h"
#include "tree-ssa.h"
#include "diagnostic-core.h"
#include "target.h"
#include "splay-tree.h"
#include "omp-low.h"
#include "gimple-low.h"
#include "cilk.h"

#include "langhooks-def.h"	/* FIXME: for lhd_set_decl_assembler_name */
#include "tree-pass.h"		/* FIXME: only for PROP_gimple_any */

enum gimplify_omp_var_data
{
  GOVD_SEEN = 1,
  GOVD_EXPLICIT = 2,
  GOVD_SHARED = 4,
  GOVD_PRIVATE = 8,
  GOVD_FIRSTPRIVATE = 16,
  GOVD_LASTPRIVATE = 32,
  GOVD_REDUCTION = 64,
  GOVD_LOCAL = 128,
  GOVD_MAP = 256,
  GOVD_DEBUG_PRIVATE = 512,
  GOVD_PRIVATE_OUTER_REF = 1024,
  GOVD_LINEAR = 2048,
  GOVD_ALIGNED = 4096,
  GOVD_MAP_TO_ONLY = 8192,
  GOVD_DATA_SHARE_CLASS = (GOVD_SHARED | GOVD_PRIVATE | GOVD_FIRSTPRIVATE
			   | GOVD_LASTPRIVATE | GOVD_REDUCTION | GOVD_LINEAR
			   | GOVD_LOCAL)
};


enum omp_region_type
{
  ORT_WORKSHARE = 0,
  ORT_SIMD = 1,
  ORT_PARALLEL = 2,
  ORT_COMBINED_PARALLEL = 3,
  ORT_TASK = 4,
  ORT_UNTIED_TASK = 5,
  ORT_TEAMS = 8,
  ORT_TARGET_DATA = 16,
  ORT_TARGET = 32
};

/* Gimplify hashtable helper.  */

struct gimplify_hasher : typed_free_remove <elt_t>
{
  typedef elt_t value_type;
  typedef elt_t compare_type;
  static inline hashval_t hash (const value_type *);
  static inline bool equal (const value_type *, const compare_type *);
};

struct gimplify_ctx
{
  struct gimplify_ctx *prev_context;

  vec<gimple> bind_expr_stack;
  tree temps;
  gimple_seq conditional_cleanups;
  tree exit_label;
  tree return_temp;

  vec<tree> case_labels;
  /* The formal temporary table.  Should this be persistent?  */
  hash_table <gimplify_hasher> temp_htab;

  int conditions;
  bool save_stack;
  bool into_ssa;
  bool allow_rhs_cond_expr;
  bool in_cleanup_point_expr;
};

struct gimplify_omp_ctx
{
  struct gimplify_omp_ctx *outer_context;
  splay_tree variables;
  struct pointer_set_t *privatized_types;
  location_t location;
  enum omp_clause_default_kind default_kind;
  enum omp_region_type region_type;
  bool combined_loop;
  bool distribute;
};

static struct gimplify_ctx *gimplify_ctxp;
static struct gimplify_omp_ctx *gimplify_omp_ctxp;

/* Forward declaration.  */
static enum gimplify_status gimplify_compound_expr (tree *, gimple_seq *, bool);

/* Shorter alias name for the above function for use in gimplify.c
   only.  */

static inline void
gimplify_seq_add_stmt (gimple_seq *seq_p, gimple gs)
{
  gimple_seq_add_stmt_without_update (seq_p, gs);
}

/* Append sequence SRC to the end of sequence *DST_P.  If *DST_P is
   NULL, a new sequence is allocated.   This function is
   similar to gimple_seq_add_seq, but does not scan the operands.
   During gimplification, we need to manipulate statement sequences
   before the def/use vectors have been constructed.  */

static void
gimplify_seq_add_seq (gimple_seq *dst_p, gimple_seq src)
{
  gimple_stmt_iterator si;

  if (src == NULL)
    return;

  si = gsi_last (*dst_p);
  gsi_insert_seq_after_without_update (&si, src, GSI_NEW_STMT);
}


/* Pointer to a list of allocated gimplify_ctx structs to be used for pushing
   and popping gimplify contexts.  */

static struct gimplify_ctx *ctx_pool = NULL;

/* Return a gimplify context struct from the pool.  */

static inline struct gimplify_ctx *
ctx_alloc (void)
{
  struct gimplify_ctx * c = ctx_pool;

  if (c)
    ctx_pool = c->prev_context;
  else
    c = XNEW (struct gimplify_ctx);

  memset (c, '\0', sizeof (*c));
  return c;
}

/* Put gimplify context C back into the pool.  */

static inline void
ctx_free (struct gimplify_ctx *c)
{
  c->prev_context = ctx_pool;
  ctx_pool = c;
}

/* Free allocated ctx stack memory.  */

void
free_gimplify_stack (void)
{
  struct gimplify_ctx *c;

  while ((c = ctx_pool))
    {
      ctx_pool = c->prev_context;
      free (c);
    }
}


/* Set up a context for the gimplifier.  */

void
push_gimplify_context (bool in_ssa, bool rhs_cond_ok)
{
  struct gimplify_ctx *c = ctx_alloc ();

  c->prev_context = gimplify_ctxp;
  gimplify_ctxp = c;
  gimplify_ctxp->into_ssa = in_ssa;
  gimplify_ctxp->allow_rhs_cond_expr = rhs_cond_ok;
}

/* Tear down a context for the gimplifier.  If BODY is non-null, then
   put the temporaries into the outer BIND_EXPR.  Otherwise, put them
   in the local_decls.

   BODY is not a sequence, but the first tuple in a sequence.  */

void
pop_gimplify_context (gimple body)
{
  struct gimplify_ctx *c = gimplify_ctxp;

  gcc_assert (c
              && (!c->bind_expr_stack.exists ()
		  || c->bind_expr_stack.is_empty ()));
  c->bind_expr_stack.release ();
  gimplify_ctxp = c->prev_context;

  if (body)
    declare_vars (c->temps, body, false);
  else
    record_vars (c->temps);

  if (c->temp_htab.is_created ())
    c->temp_htab.dispose ();
  ctx_free (c);
}

/* Push a GIMPLE_BIND tuple onto the stack of bindings.  */

static void
gimple_push_bind_expr (gimple gimple_bind)
{
  gimplify_ctxp->bind_expr_stack.reserve (8);
  gimplify_ctxp->bind_expr_stack.safe_push (gimple_bind);
}

/* Pop the first element off the stack of bindings.  */

static void
gimple_pop_bind_expr (void)
{
  gimplify_ctxp->bind_expr_stack.pop ();
}

/* Return the first element of the stack of bindings.  */

gimple
gimple_current_bind_expr (void)
{
  return gimplify_ctxp->bind_expr_stack.last ();
}

/* Return the stack of bindings created during gimplification.  */

vec<gimple> 
gimple_bind_expr_stack (void)
{
  return gimplify_ctxp->bind_expr_stack;
}

/* Return true iff there is a COND_EXPR between us and the innermost
   CLEANUP_POINT_EXPR.  This info is used by gimple_push_cleanup.  */

static bool
gimple_conditional_context (void)
{
  return gimplify_ctxp->conditions > 0;
}

/* Note that we've entered a COND_EXPR.  */

static void
gimple_push_condition (void)
{
#ifdef ENABLE_GIMPLE_CHECKING
  if (gimplify_ctxp->conditions == 0)
    gcc_assert (gimple_seq_empty_p (gimplify_ctxp->conditional_cleanups));
#endif
  ++(gimplify_ctxp->conditions);
}

/* Note that we've left a COND_EXPR.  If we're back at unconditional scope
   now, add any conditional cleanups we've seen to the prequeue.  */

static void
gimple_pop_condition (gimple_seq *pre_p)
{
  int conds = --(gimplify_ctxp->conditions);

  gcc_assert (conds >= 0);
  if (conds == 0)
    {
      gimplify_seq_add_seq (pre_p, gimplify_ctxp->conditional_cleanups);
      gimplify_ctxp->conditional_cleanups = NULL;
    }
}

/* 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);
}

/* Create a new omp construct that deals with variable remapping.  */

static struct gimplify_omp_ctx *
new_omp_context (enum omp_region_type region_type)
{
  struct gimplify_omp_ctx *c;

  c = XCNEW (struct gimplify_omp_ctx);
  c->outer_context = gimplify_omp_ctxp;
  c->variables = splay_tree_new (splay_tree_compare_decl_uid, 0, 0);
  c->privatized_types = pointer_set_create ();
  c->location = input_location;
  c->region_type = region_type;
  if ((region_type & ORT_TASK) == 0)
    c->default_kind = OMP_CLAUSE_DEFAULT_SHARED;
  else
    c->default_kind = OMP_CLAUSE_DEFAULT_UNSPECIFIED;

  return c;
}

/* Destroy an omp construct that deals with variable remapping.  */

static void
delete_omp_context (struct gimplify_omp_ctx *c)
{
  splay_tree_delete (c->variables);
  pointer_set_destroy (c->privatized_types);
  XDELETE (c);
}

static void omp_add_variable (struct gimplify_omp_ctx *, tree, unsigned int);
static bool omp_notice_variable (struct gimplify_omp_ctx *, tree, bool);

/* Both gimplify the statement T and append it to *SEQ_P.  This function
   behaves exactly as gimplify_stmt, but you don't have to pass T as a
   reference.  */

void
gimplify_and_add (tree t, gimple_seq *seq_p)
{
  gimplify_stmt (&t, seq_p);
}

/* Gimplify statement T into sequence *SEQ_P, and return the first
   tuple in the sequence of generated tuples for this statement.
   Return NULL if gimplifying T produced no tuples.  */

static gimple
gimplify_and_return_first (tree t, gimple_seq *seq_p)
{
  gimple_stmt_iterator last = gsi_last (*seq_p);

  gimplify_and_add (t, seq_p);

  if (!gsi_end_p (last))
    {
      gsi_next (&last);
      return gsi_stmt (last);
    }
  else
    return gimple_seq_first_stmt (*seq_p);
}

/* Returns true iff T is a valid RHS for an assignment to an un-renamed
   LHS, or for a call argument.  */

static bool
is_gimple_mem_rhs (tree t)
{
  /* If we're dealing with a renamable type, either source or dest must be
     a renamed variable.  */
  if (is_gimple_reg_type (TREE_TYPE (t)))
    return is_gimple_val (t);
  else
    return is_gimple_val (t) || is_gimple_lvalue (t);
}

/* Return true if T is a CALL_EXPR or an expression that can be
   assigned to a temporary.  Note that this predicate should only be
   used during gimplification.  See the rationale for this in
   gimplify_modify_expr.  */

static bool
is_gimple_reg_rhs_or_call (tree t)
{
  return (get_gimple_rhs_class (TREE_CODE (t)) != GIMPLE_INVALID_RHS
	  || TREE_CODE (t) == CALL_EXPR);
}

/* Return true if T is a valid memory RHS or a CALL_EXPR.  Note that
   this predicate should only be used during gimplification.  See the
   rationale for this in gimplify_modify_expr.  */

static bool
is_gimple_mem_rhs_or_call (tree t)
{
  /* If we're dealing with a renamable type, either source or dest must be
     a renamed variable.  */
  if (is_gimple_reg_type (TREE_TYPE (t)))
    return is_gimple_val (t);
  else
    return (is_gimple_val (t) || is_gimple_lvalue (t)
	    || TREE_CODE (t) == CALL_EXPR);
}

/* Create a temporary with a name derived from VAL.  Subroutine of
   lookup_tmp_var; nobody else should call this function.  */

static inline tree
create_tmp_from_val (tree val, bool is_formal)
{
  /* Drop all qualifiers and address-space information from the value type.  */
  tree type = TYPE_MAIN_VARIANT (TREE_TYPE (val));
  tree var = create_tmp_var (type, get_name (val));
  if (is_formal
      && (TREE_CODE (TREE_TYPE (var)) == COMPLEX_TYPE
	  || TREE_CODE (TREE_TYPE (var)) == VECTOR_TYPE))
    DECL_GIMPLE_REG_P (var) = 1;
  return var;
}

/* Create a temporary to hold the value of VAL.  If IS_FORMAL, try to reuse
   an existing expression temporary.  */

static tree
lookup_tmp_var (tree val, bool is_formal)
{
  tree ret;

  /* If not optimizing, never really reuse a temporary.  local-alloc
     won't allocate any variable that is used in more than one basic
     block, which means it will go into memory, causing much extra
     work in reload and final and poorer code generation, outweighing
     the extra memory allocation here.  */
  if (!optimize || !is_formal || TREE_SIDE_EFFECTS (val))
    ret = create_tmp_from_val (val, is_formal);
  else
    {
      elt_t elt, *elt_p;
      elt_t **slot;

      elt.val = val;
      if (!gimplify_ctxp->temp_htab.is_created ())
        gimplify_ctxp->temp_htab.create (1000);
      slot = gimplify_ctxp->temp_htab.find_slot (&elt, INSERT);
      if (*slot == NULL)
	{
	  elt_p = XNEW (elt_t);
	  elt_p->val = val;
	  elt_p->temp = ret = create_tmp_from_val (val, is_formal);
	  *slot = elt_p;
	}
      else
	{
	  elt_p = *slot;
          ret = elt_p->temp;
	}
    }

  return ret;
}

/* Helper for get_formal_tmp_var and get_initialized_tmp_var.  */

static tree
internal_get_tmp_var (tree val, gimple_seq *pre_p, gimple_seq *post_p,
                      bool is_formal)
{
  tree t, mod;

  /* Notice that we explicitly allow VAL to be a CALL_EXPR so that we
     can create an INIT_EXPR and convert it into a GIMPLE_CALL below.  */
  gimplify_expr (&val, pre_p, post_p, is_gimple_reg_rhs_or_call,
		 fb_rvalue);

  if (gimplify_ctxp->into_ssa
      && is_gimple_reg_type (TREE_TYPE (val)))
    t = make_ssa_name (TYPE_MAIN_VARIANT (TREE_TYPE (val)), NULL);
  else
    t = lookup_tmp_var (val, is_formal);

  mod = build2 (INIT_EXPR, TREE_TYPE (t), t, unshare_expr (val));

  SET_EXPR_LOCATION (mod, EXPR_LOC_OR_LOC (val, input_location));

  /* gimplify_modify_expr might want to reduce this further.  */
  gimplify_and_add (mod, pre_p);
  ggc_free (mod);

  return t;
}

/* Return a formal temporary variable initialized with VAL.  PRE_P is as
   in gimplify_expr.  Only use this function if:

   1) The value of the unfactored expression represented by VAL will not
      change between the initialization and use of the temporary, and
   2) The temporary will not be otherwise modified.

   For instance, #1 means that this is inappropriate for SAVE_EXPR temps,
   and #2 means it is inappropriate for && temps.

   For other cases, use get_initialized_tmp_var instead.  */

tree
get_formal_tmp_var (tree val, gimple_seq *pre_p)
{
  return internal_get_tmp_var (val, pre_p, NULL, true);
}

/* Return a temporary variable initialized with VAL.  PRE_P and POST_P
   are as in gimplify_expr.  */

tree
get_initialized_tmp_var (tree val, gimple_seq *pre_p, gimple_seq *post_p)
{
  return internal_get_tmp_var (val, pre_p, post_p, false);
}

/* Declare all the variables in VARS in SCOPE.  If DEBUG_INFO is true,
   generate debug info for them; otherwise don't.  */

void
declare_vars (tree vars, gimple scope, bool debug_info)
{
  tree last = vars;
  if (last)
    {
      tree temps, block;

      gcc_assert (gimple_code (scope) == GIMPLE_BIND);

      temps = nreverse (last);

      block = gimple_bind_block (scope);
      gcc_assert (!block || TREE_CODE (block) == BLOCK);
      if (!block || !debug_info)
	{
	  DECL_CHAIN (last) = gimple_bind_vars (scope);
	  gimple_bind_set_vars (scope, temps);
	}
      else
	{
	  /* We need to attach the nodes both to the BIND_EXPR and to its
	     associated BLOCK for debugging purposes.  The key point here
	     is that the BLOCK_VARS of the BIND_EXPR_BLOCK of a BIND_EXPR
	     is a subchain of the BIND_EXPR_VARS of the BIND_EXPR.  */
	  if (BLOCK_VARS (block))
	    BLOCK_VARS (block) = chainon (BLOCK_VARS (block), temps);
	  else
	    {
	      gimple_bind_set_vars (scope,
	      			    chainon (gimple_bind_vars (scope), temps));
	      BLOCK_VARS (block) = temps;
	    }
	}
    }
}

/* For VAR a VAR_DECL of variable size, try to find a constant upper bound
   for the size and adjust DECL_SIZE/DECL_SIZE_UNIT accordingly.  Abort if
   no such upper bound can be obtained.  */

static void
force_constant_size (tree var)
{
  /* The only attempt we make is by querying the maximum size of objects
     of the variable's type.  */

  HOST_WIDE_INT max_size;

  gcc_assert (TREE_CODE (var) == VAR_DECL);

  max_size = max_int_size_in_bytes (TREE_TYPE (var));

  gcc_assert (max_size >= 0);

  DECL_SIZE_UNIT (var)
    = build_int_cst (TREE_TYPE (DECL_SIZE_UNIT (var)), max_size);
  DECL_SIZE (var)
    = build_int_cst (TREE_TYPE (DECL_SIZE (var)), max_size * BITS_PER_UNIT);
}

/* Push the temporary variable TMP into the current binding.  */

void
gimple_add_tmp_var_fn (struct function *fn, tree tmp)
{
  gcc_assert (!DECL_CHAIN (tmp) && !DECL_SEEN_IN_BIND_EXPR_P (tmp));

  /* Later processing assumes that the object size is constant, which might
     not be true at this point.  Force the use of a constant upper bound in
     this case.  */
  if (!tree_fits_uhwi_p (DECL_SIZE_UNIT (tmp)))
    force_constant_size (tmp);

  DECL_CONTEXT (tmp) = fn->decl;
  DECL_SEEN_IN_BIND_EXPR_P (tmp) = 1;

  record_vars_into (tmp, fn->decl);
}

/* Push the temporary variable TMP into the current binding.  */

void
gimple_add_tmp_var (tree tmp)
{
  gcc_assert (!DECL_CHAIN (tmp) && !DECL_SEEN_IN_BIND_EXPR_P (tmp));

  /* Later processing assumes that the object size is constant, which might
     not be true at this point.  Force the use of a constant upper bound in
     this case.  */
  if (!tree_fits_uhwi_p (DECL_SIZE_UNIT (tmp)))
    force_constant_size (tmp);

  DECL_CONTEXT (tmp) = current_function_decl;
  DECL_SEEN_IN_BIND_EXPR_P (tmp) = 1;

  if (gimplify_ctxp)
    {
      DECL_CHAIN (tmp) = gimplify_ctxp->temps;
      gimplify_ctxp->temps = tmp;

      /* Mark temporaries local within the nearest enclosing parallel.  */
      if (gimplify_omp_ctxp)
	{
	  struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp;
	  while (ctx
		 && (ctx->region_type == ORT_WORKSHARE
		     || ctx->region_type == ORT_SIMD))
	    ctx = ctx->outer_context;
	  if (ctx)
	    omp_add_variable (ctx, tmp, GOVD_LOCAL | GOVD_SEEN);
	}
    }
  else if (cfun)
    record_vars (tmp);
  else
    {
      gimple_seq body_seq;

      /* This case is for nested functions.  We need to expose the locals
	 they create.  */
      body_seq = gimple_body (current_function_decl);
      declare_vars (tmp, gimple_seq_first_stmt (body_seq), false);
    }
}



/* This page contains routines to unshare tree nodes, i.e. to duplicate tree
   nodes that are referenced more than once in GENERIC functions.  This is
   necessary because gimplification (translation into GIMPLE) is performed
   by modifying tree nodes in-place, so gimplication of a shared node in a
   first context could generate an invalid GIMPLE form in a second context.

   This is achieved with a simple mark/copy/unmark algorithm that walks the
   GENERIC representation top-down, marks nodes with TREE_VISITED the first
   time it encounters them, duplicates them if they already have TREE_VISITED
   set, and finally removes the TREE_VISITED marks it has set.

   The algorithm works only at the function level, i.e. it generates a GENERIC
   representation of a function with no nodes shared within the function when
   passed a GENERIC function (except for nodes that are allowed to be shared).

   At the global level, it is also necessary to unshare tree nodes that are
   referenced in more than one function, for the same aforementioned reason.
   This requires some cooperation from the front-end.  There are 2 strategies:

     1. Manual unsharing.  The front-end needs to call unshare_expr on every
        expression that might end up being shared across functions.

     2. Deep unsharing.  This is an extension of regular unsharing.  Instead
        of calling unshare_expr on expressions that might be shared across
        functions, the front-end pre-marks them with TREE_VISITED.  This will
        ensure that they are unshared on the first reference within functions
        when the regular unsharing algorithm runs.  The counterpart is that
        this algorithm must look deeper than for manual unsharing, which is
        specified by LANG_HOOKS_DEEP_UNSHARING.

  If there are only few specific cases of node sharing across functions, it is
  probably easier for a front-end to unshare the expressions manually.  On the
  contrary, if the expressions generated at the global level are as widespread
  as expressions generated within functions, deep unsharing is very likely the
  way to go.  */

/* Similar to copy_tree_r but do not copy SAVE_EXPR or TARGET_EXPR nodes.
   These nodes model computations that must be done once.  If we were to
   unshare something like SAVE_EXPR(i++), the gimplification process would
   create wrong code.  However, if DATA is non-null, it must hold a pointer
   set that is used to unshare the subtrees of these nodes.  */

static tree
mostly_copy_tree_r (tree *tp, int *walk_subtrees, void *data)
{
  tree t = *tp;
  enum tree_code code = TREE_CODE (t);

  /* Do not copy SAVE_EXPR, TARGET_EXPR or BIND_EXPR nodes themselves, but
     copy their subtrees if we can make sure to do it only once.  */
  if (code == SAVE_EXPR || code == TARGET_EXPR || code == BIND_EXPR)
    {
      if (data && !pointer_set_insert ((struct pointer_set_t *)data, t))
	;
      else
	*walk_subtrees = 0;
    }

  /* Stop at types, decls, constants like copy_tree_r.  */
  else if (TREE_CODE_CLASS (code) == tcc_type
	   || TREE_CODE_CLASS (code) == tcc_declaration
	   || TREE_CODE_CLASS (code) == tcc_constant
	   /* We can't do anything sensible with a BLOCK used as an
	      expression, but we also can't just die when we see it
	      because of non-expression uses.  So we avert our eyes
	      and cross our fingers.  Silly Java.  */
	   || code == BLOCK)
    *walk_subtrees = 0;

  /* Cope with the statement expression extension.  */
  else if (code == STATEMENT_LIST)
    ;

  /* Leave the bulk of the work to copy_tree_r itself.  */
  else
    copy_tree_r (tp, walk_subtrees, NULL);

  return NULL_TREE;
}

/* Callback for walk_tree to unshare most of the shared trees rooted at *TP.
   If *TP has been visited already, then *TP is deeply copied by calling
   mostly_copy_tree_r.  DATA is passed to mostly_copy_tree_r unmodified.  */

static tree
copy_if_shared_r (tree *tp, int *walk_subtrees, void *data)
{
  tree t = *tp;
  enum tree_code code = TREE_CODE (t);

  /* Skip types, decls, and constants.  But we do want to look at their
     types and the bounds of types.  Mark them as visited so we properly
     unmark their subtrees on the unmark pass.  If we've already seen them,
     don't look down further.  */
  if (TREE_CODE_CLASS (code) == tcc_type
      || TREE_CODE_CLASS (code) == tcc_declaration
      || TREE_CODE_CLASS (code) == tcc_constant)
    {
      if (TREE_VISITED (t))
	*walk_subtrees = 0;
      else
	TREE_VISITED (t) = 1;
    }

  /* If this node has been visited already, unshare it and don't look
     any deeper.  */
  else if (TREE_VISITED (t))
    {
      walk_tree (tp, mostly_copy_tree_r, data, NULL);
      *walk_subtrees = 0;
    }

  /* Otherwise, mark the node as visited and keep looking.  */
  else
    TREE_VISITED (t) = 1;

  return NULL_TREE;
}

/* Unshare most of the shared trees rooted at *TP.  DATA is passed to the
   copy_if_shared_r callback unmodified.  */

static inline void
copy_if_shared (tree *tp, void *data)
{
  walk_tree (tp, copy_if_shared_r, data, NULL);
}

/* Unshare all the trees in the body of FNDECL, as well as in the bodies of
   any nested functions.  */

static void
unshare_body (tree fndecl)
{
  struct cgraph_node *cgn = cgraph_get_node (fndecl);
  /* If the language requires deep unsharing, we need a pointer set to make
     sure we don't repeatedly unshare subtrees of unshareable nodes.  */
  struct pointer_set_t *visited
    = lang_hooks.deep_unsharing ? pointer_set_create () : NULL;

  copy_if_shared (&DECL_SAVED_TREE (fndecl), visited);
  copy_if_shared (&DECL_SIZE (DECL_RESULT (fndecl)), visited);
  copy_if_shared (&DECL_SIZE_UNIT (DECL_RESULT (fndecl)), visited);

  if (visited)
    pointer_set_destroy (visited);

  if (cgn)
    for (cgn = cgn->nested; cgn; cgn = cgn->next_nested)
      unshare_body (cgn->decl);
}

/* Callback for walk_tree to unmark the visited trees rooted at *TP.
   Subtrees are walked until the first unvisited node is encountered.  */

static tree
unmark_visited_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
{
  tree t = *tp;

  /* If this node has been visited, unmark it and keep looking.  */
  if (TREE_VISITED (t))
    TREE_VISITED (t) = 0;

  /* Otherwise, don't look any deeper.  */
  else
    *walk_subtrees = 0;

  return NULL_TREE;
}

/* Unmark the visited trees rooted at *TP.  */

static inline void
unmark_visited (tree *tp)
{
  walk_tree (tp, unmark_visited_r, NULL, NULL);
}

/* Likewise, but mark all trees as not visited.  */

static void
unvisit_body (tree fndecl)
{
  struct cgraph_node *cgn = cgraph_get_node (fndecl);

  unmark_visited (&DECL_SAVED_TREE (fndecl));
  unmark_visited (&DECL_SIZE (DECL_RESULT (fndecl)));
  unmark_visited (&DECL_SIZE_UNIT (DECL_RESULT (fndecl)));

  if (cgn)
    for (cgn = cgn->nested; cgn; cgn = cgn->next_nested)
      unvisit_body (cgn->decl);
}

/* Unconditionally make an unshared copy of EXPR.  This is used when using
   stored expressions which span multiple functions, such as BINFO_VTABLE,
   as the normal unsharing process can't tell that they're shared.  */

tree
unshare_expr (tree expr)
{
  walk_tree (&expr, mostly_copy_tree_r, NULL, NULL);
  return expr;
}

/* Worker for unshare_expr_without_location.  */

static tree
prune_expr_location (tree *tp, int *walk_subtrees, void *)
{
  if (EXPR_P (*tp))
    SET_EXPR_LOCATION (*tp, UNKNOWN_LOCATION);
  else
    *walk_subtrees = 0;
  return NULL_TREE;
}

/* Similar to unshare_expr but also prune all expression locations
   from EXPR.  */

tree
unshare_expr_without_location (tree expr)
{
  walk_tree (&expr, mostly_copy_tree_r, NULL, NULL);
  if (EXPR_P (expr))
    walk_tree (&expr, prune_expr_location, NULL, NULL);
  return expr;
}

/* WRAPPER is a code such as BIND_EXPR or CLEANUP_POINT_EXPR which can both
   contain statements and have a value.  Assign its value to a temporary
   and give it void_type_node.  Return the temporary, or NULL_TREE if
   WRAPPER was already void.  */

tree
voidify_wrapper_expr (tree wrapper, tree temp)
{
  tree type = TREE_TYPE (wrapper);
  if (type && !VOID_TYPE_P (type))
    {
      tree *p;

      /* Set p to point to the body of the wrapper.  Loop until we find
	 something that isn't a wrapper.  */
      for (p = &wrapper; p && *p; )
	{
	  switch (TREE_CODE (*p))
	    {
	    case BIND_EXPR:
	      TREE_SIDE_EFFECTS (*p) = 1;
	      TREE_TYPE (*p) = void_type_node;
	      /* For a BIND_EXPR, the body is operand 1.  */
	      p = &BIND_EXPR_BODY (*p);
	      break;

	    case CLEANUP_POINT_EXPR:
	    case TRY_FINALLY_EXPR:
	    case TRY_CATCH_EXPR:
	      TREE_SIDE_EFFECTS (*p) = 1;
	      TREE_TYPE (*p) = void_type_node;
	      p = &TREE_OPERAND (*p, 0);
	      break;

	    case STATEMENT_LIST:
	      {
		tree_stmt_iterator i = tsi_last (*p);
		TREE_SIDE_EFFECTS (*p) = 1;
		TREE_TYPE (*p) = void_type_node;
		p = tsi_end_p (i) ? NULL : tsi_stmt_ptr (i);
	      }
	      break;

	    case COMPOUND_EXPR:
	      /* Advance to the last statement.  Set all container types to
		 void.  */
	      for (; TREE_CODE (*p) == COMPOUND_EXPR; p = &TREE_OPERAND (*p, 1))
		{
		  TREE_SIDE_EFFECTS (*p) = 1;
		  TREE_TYPE (*p) = void_type_node;
		}
	      break;

	    case TRANSACTION_EXPR:
	      TREE_SIDE_EFFECTS (*p) = 1;
	      TREE_TYPE (*p) = void_type_node;
	      p = &TRANSACTION_EXPR_BODY (*p);
	      break;

	    default:
	      /* Assume that any tree upon which voidify_wrapper_expr is
		 directly called is a wrapper, and that its body is op0.  */
	      if (p == &wrapper)
		{
		  TREE_SIDE_EFFECTS (*p) = 1;
		  TREE_TYPE (*p) = void_type_node;
		  p = &TREE_OPERAND (*p, 0);
		  break;
		}
	      goto out;
	    }
	}

    out:
      if (p == NULL || IS_EMPTY_STMT (*p))
	temp = NULL_TREE;
      else if (temp)
	{
	  /* The wrapper is on the RHS of an assignment that we're pushing
	     down.  */
	  gcc_assert (TREE_CODE (temp) == INIT_EXPR
		      || TREE_CODE (temp) == MODIFY_EXPR);
	  TREE_OPERAND (temp, 1) = *p;
	  *p = temp;
	}
      else
	{
	  temp = create_tmp_var (type, "retval");
	  *p = build2 (INIT_EXPR, type, temp, *p);
	}

      return temp;
    }

  return NULL_TREE;
}

/* Prepare calls to builtins to SAVE and RESTORE the stack as well as
   a temporary through which they communicate.  */

static void
build_stack_save_restore (gimple *save, gimple *restore)
{
  tree tmp_var;

  *save = gimple_build_call (builtin_decl_implicit (BUILT_IN_STACK_SAVE), 0);
  tmp_var = create_tmp_var (ptr_type_node, "saved_stack");
  gimple_call_set_lhs (*save, tmp_var);

  *restore
    = gimple_build_call (builtin_decl_implicit (BUILT_IN_STACK_RESTORE),
			 1, tmp_var);
}

/* Gimplify a BIND_EXPR.  Just voidify and recurse.  */

static enum gimplify_status
gimplify_bind_expr (tree *expr_p, gimple_seq *pre_p)
{
  tree bind_expr = *expr_p;
  bool old_save_stack = gimplify_ctxp->save_stack;
  tree t;
  gimple gimple_bind;
  gimple_seq body, cleanup;
  gimple stack_save;

  tree temp = voidify_wrapper_expr (bind_expr, NULL);

  /* Mark variables seen in this bind expr.  */
  for (t = BIND_EXPR_VARS (bind_expr); t ; t = DECL_CHAIN (t))
    {
      if (TREE_CODE (t) == VAR_DECL)
	{
	  struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp;

	  /* Mark variable as local.  */
	  if (ctx && !DECL_EXTERNAL (t)
	      && (! DECL_SEEN_IN_BIND_EXPR_P (t)
		  || splay_tree_lookup (ctx->variables,
					(splay_tree_key) t) == NULL))
	    {
	      if (ctx->region_type == ORT_SIMD
		  && TREE_ADDRESSABLE (t)
		  && !TREE_STATIC (t))
		omp_add_variable (ctx, t, GOVD_PRIVATE | GOVD_SEEN);
	      else
		omp_add_variable (ctx, t, GOVD_LOCAL | GOVD_SEEN);
	    }

	  DECL_SEEN_IN_BIND_EXPR_P (t) = 1;

	  if (DECL_HARD_REGISTER (t) && !is_global_var (t) && cfun)
	    cfun->has_local_explicit_reg_vars = true;
	}

      /* Preliminarily mark non-addressed complex variables as eligible
	 for promotion to gimple registers.  We'll transform their uses
	 as we find them.  */
      if ((TREE_CODE (TREE_TYPE (t)) == COMPLEX_TYPE
	   || TREE_CODE (TREE_TYPE (t)) == VECTOR_TYPE)
	  && !TREE_THIS_VOLATILE (t)
	  && (TREE_CODE (t) == VAR_DECL && !DECL_HARD_REGISTER (t))
	  && !needs_to_live_in_memory (t))
	DECL_GIMPLE_REG_P (t) = 1;
    }

  gimple_bind = gimple_build_bind (BIND_EXPR_VARS (bind_expr), NULL,
                                   BIND_EXPR_BLOCK (bind_expr));
  gimple_push_bind_expr (gimple_bind);

  gimplify_ctxp->save_stack = false;

  /* Gimplify the body into the GIMPLE_BIND tuple's body.  */
  body = NULL;
  gimplify_stmt (&BIND_EXPR_BODY (bind_expr), &body);
  gimple_bind_set_body (gimple_bind, body);

  cleanup = NULL;
  stack_save = NULL;
  if (gimplify_ctxp->save_stack)
    {
      gimple stack_restore;

      /* Save stack on entry and restore it on exit.  Add a try_finally
	 block to achieve this.  */
      build_stack_save_restore (&stack_save, &stack_restore);

      gimplify_seq_add_stmt (&cleanup, stack_restore);
    }

  /* Add clobbers for all variables that go out of scope.  */
  for (t = BIND_EXPR_VARS (bind_expr); t ; t = DECL_CHAIN (t))
    {
      if (TREE_CODE (t) == VAR_DECL
	  && !is_global_var (t)
	  && DECL_CONTEXT (t) == current_function_decl
	  && !DECL_HARD_REGISTER (t)
	  && !TREE_THIS_VOLATILE (t)
	  && !DECL_HAS_VALUE_EXPR_P (t)
	  /* Only care for variables that have to be in memory.  Others
	     will be rewritten into SSA names, hence moved to the top-level.  */
	  && !is_gimple_reg (t)
	  && flag_stack_reuse != SR_NONE)
	{
	  tree clobber = build_constructor (TREE_TYPE (t),
					    NULL);
	  TREE_THIS_VOLATILE (clobber) = 1;
	  gimplify_seq_add_stmt (&cleanup, gimple_build_assign (t, clobber));
	}
    }

  if (cleanup)
    {
      gimple gs;
      gimple_seq new_body;

      new_body = NULL;
      gs = gimple_build_try (gimple_bind_body (gimple_bind), cleanup,
	  		     GIMPLE_TRY_FINALLY);

      if (stack_save)
	gimplify_seq_add_stmt (&new_body, stack_save);
      gimplify_seq_add_stmt (&new_body, gs);
      gimple_bind_set_body (gimple_bind, new_body);
    }

  gimplify_ctxp->save_stack = old_save_stack;
  gimple_pop_bind_expr ();

  gimplify_seq_add_stmt (pre_p, gimple_bind);

  if (temp)
    {
      *expr_p = temp;
      return GS_OK;
    }

  *expr_p = NULL_TREE;
  return GS_ALL_DONE;
}

/* Gimplify a RETURN_EXPR.  If the expression to be returned is not a
   GIMPLE value, it is assigned to a new temporary and the statement is
   re-written to return the temporary.

   PRE_P points to the sequence where side effects that must happen before
   STMT should be stored.  */

static enum gimplify_status
gimplify_return_expr (tree stmt, gimple_seq *pre_p)
{
  gimple ret;
  tree ret_expr = TREE_OPERAND (stmt, 0);
  tree result_decl, result;

  if (ret_expr == error_mark_node)
    return GS_ERROR;

  /* Implicit _Cilk_sync must be inserted right before any return statement 
     if there is a _Cilk_spawn in the function.  If the user has provided a 
     _Cilk_sync, the optimizer should remove this duplicate one.  */
  if (fn_contains_cilk_spawn_p (cfun))
    {
      tree impl_sync = build0 (CILK_SYNC_STMT, void_type_node);
      gimplify_and_add (impl_sync, pre_p);
    }

  if (!ret_expr
      || TREE_CODE (ret_expr) == RESULT_DECL
      || ret_expr == error_mark_node)
    {
      gimple ret = gimple_build_return (ret_expr);
      gimple_set_no_warning (ret, TREE_NO_WARNING (stmt));
      gimplify_seq_add_stmt (pre_p, ret);
      return GS_ALL_DONE;
    }

  if (VOID_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl))))
    result_decl = NULL_TREE;
  else
    {
      result_decl = TREE_OPERAND (ret_expr, 0);

      /* See through a return by reference.  */
      if (TREE_CODE (result_decl) == INDIRECT_REF)
	result_decl = TREE_OPERAND (result_decl, 0);

      gcc_assert ((TREE_CODE (ret_expr) == MODIFY_EXPR
		   || TREE_CODE (ret_expr) == INIT_EXPR)
		  && TREE_CODE (result_decl) == RESULT_DECL);
    }

  /* If aggregate_value_p is true, then we can return the bare RESULT_DECL.
     Recall that aggregate_value_p is FALSE for any aggregate type that is
     returned in registers.  If we're returning values in registers, then
     we don't want to extend the lifetime of the RESULT_DECL, particularly
     across another call.  In addition, for those aggregates for which
     hard_function_value generates a PARALLEL, we'll die during normal
     expansion of structure assignments; there's special code in expand_return
     to handle this case that does not exist in expand_expr.  */
  if (!result_decl)
    result = NULL_TREE;
  else if (aggregate_value_p (result_decl, TREE_TYPE (current_function_decl)))
    {
      if (TREE_CODE (DECL_SIZE (result_decl)) != INTEGER_CST)
	{
	  if (!TYPE_SIZES_GIMPLIFIED (TREE_TYPE (result_decl)))
	    gimplify_type_sizes (TREE_TYPE (result_decl), pre_p);
	  /* Note that we don't use gimplify_vla_decl because the RESULT_DECL
	     should be effectively allocated by the caller, i.e. all calls to
	     this function must be subject to the Return Slot Optimization.  */
	  gimplify_one_sizepos (&DECL_SIZE (result_decl), pre_p);
	  gimplify_one_sizepos (&DECL_SIZE_UNIT (result_decl), pre_p);
	}
      result = result_decl;
    }
  else if (gimplify_ctxp->return_temp)
    result = gimplify_ctxp->return_temp;
  else
    {
      result = create_tmp_reg (TREE_TYPE (result_decl), NULL);

      /* ??? With complex control flow (usually involving abnormal edges),
	 we can wind up warning about an uninitialized value for this.  Due
	 to how this variable is constructed and initialized, this is never
	 true.  Give up and never warn.  */
      TREE_NO_WARNING (result) = 1;

      gimplify_ctxp->return_temp = result;
    }

  /* Smash the lhs of the MODIFY_EXPR to the temporary we plan to use.
     Then gimplify the whole thing.  */
  if (result != result_decl)
    TREE_OPERAND (ret_expr, 0) = result;

  gimplify_and_add (TREE_OPERAND (stmt, 0), pre_p);

  ret = gimple_build_return (result);
  gimple_set_no_warning (ret, TREE_NO_WARNING (stmt));
  gimplify_seq_add_stmt (pre_p, ret);

  return GS_ALL_DONE;
}

/* Gimplify a variable-length array DECL.  */

static void
gimplify_vla_decl (tree decl, gimple_seq *seq_p)
{
  /* This is a variable-sized decl.  Simplify its size and mark it
     for deferred expansion.  */
  tree t, addr, ptr_type;

  gimplify_one_sizepos (&DECL_SIZE (decl), seq_p);
  gimplify_one_sizepos (&DECL_SIZE_UNIT (decl), seq_p);

  /* Don't mess with a DECL_VALUE_EXPR set by the front-end.  */
  if (DECL_HAS_VALUE_EXPR_P (decl))
    return;

  /* All occurrences of this decl in final gimplified code will be
     replaced by indirection.  Setting DECL_VALUE_EXPR does two
     things: First, it lets the rest of the gimplifier know what
     replacement to use.  Second, it lets the debug info know
     where to find the value.  */
  ptr_type = build_pointer_type (TREE_TYPE (decl));
  addr = create_tmp_var (ptr_type, get_name (decl));
  DECL_IGNORED_P (addr) = 0;
  t = build_fold_indirect_ref (addr);
  TREE_THIS_NOTRAP (t) = 1;
  SET_DECL_VALUE_EXPR (decl, t);
  DECL_HAS_VALUE_EXPR_P (decl) = 1;

  t = builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN);
  t = build_call_expr (t, 2, DECL_SIZE_UNIT (decl),
		       size_int (DECL_ALIGN (decl)));
  /* The call has been built for a variable-sized object.  */
  CALL_ALLOCA_FOR_VAR_P (t) = 1;
  t = fold_convert (ptr_type, t);
  t = build2 (MODIFY_EXPR, TREE_TYPE (addr), addr, t);

  gimplify_and_add (t, seq_p);

  /* Indicate that we need to restore the stack level when the
     enclosing BIND_EXPR is exited.  */
  gimplify_ctxp->save_stack = true;
}

/* A helper function to be called via walk_tree.  Mark all labels under *TP
   as being forced.  To be called for DECL_INITIAL of static variables.  */

static tree
force_labels_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
{
  if (TYPE_P (*tp))
    *walk_subtrees = 0;
  if (TREE_CODE (*tp) == LABEL_DECL)
    FORCED_LABEL (*tp) = 1;

  return NULL_TREE;
}

/* Gimplify a DECL_EXPR node *STMT_P by making any necessary allocation
   and initialization explicit.  */

static enum gimplify_status
gimplify_decl_expr (tree *stmt_p, gimple_seq *seq_p)
{
  tree stmt = *stmt_p;
  tree decl = DECL_EXPR_DECL (stmt);

  *stmt_p = NULL_TREE;

  if (TREE_TYPE (decl) == error_mark_node)
    return GS_ERROR;

  if ((TREE_CODE (decl) == TYPE_DECL
       || TREE_CODE (decl) == VAR_DECL)
      && !TYPE_SIZES_GIMPLIFIED (TREE_TYPE (decl)))
    gimplify_type_sizes (TREE_TYPE (decl), seq_p);

  /* ??? DECL_ORIGINAL_TYPE is streamed for LTO so it needs to be gimplified
     in case its size expressions contain problematic nodes like CALL_EXPR.  */
  if (TREE_CODE (decl) == TYPE_DECL
      && DECL_ORIGINAL_TYPE (decl)
      && !TYPE_SIZES_GIMPLIFIED (DECL_ORIGINAL_TYPE (decl)))
    gimplify_type_sizes (DECL_ORIGINAL_TYPE (decl), seq_p);

  if (TREE_CODE (decl) == VAR_DECL && !DECL_EXTERNAL (decl))
    {
      tree init = DECL_INITIAL (decl);

      if (TREE_CODE (DECL_SIZE_UNIT (decl)) != INTEGER_CST
	  || (!TREE_STATIC (decl)
	      && flag_stack_check == GENERIC_STACK_CHECK
	      && compare_tree_int (DECL_SIZE_UNIT (decl),
				   STACK_CHECK_MAX_VAR_SIZE) > 0))
	gimplify_vla_decl (decl, seq_p);

      /* Some front ends do not explicitly declare all anonymous
	 artificial variables.  We compensate here by declaring the
	 variables, though it would be better if the front ends would
	 explicitly declare them.  */
      if (!DECL_SEEN_IN_BIND_EXPR_P (decl)
	  && DECL_ARTIFICIAL (decl) && DECL_NAME (decl) == NULL_TREE)
	gimple_add_tmp_var (decl);

      if (init && init != error_mark_node)
	{
	  if (!TREE_STATIC (decl))
	    {
	      DECL_INITIAL (decl) = NULL_TREE;
	      init = build2 (INIT_EXPR, void_type_node, decl, init);
	      gimplify_and_add (init, seq_p);
	      ggc_free (init);
	    }
	  else
	    /* We must still examine initializers for static variables
	       as they may contain a label address.  */
	    walk_tree (&init, force_labels_r, NULL, NULL);
	}
    }

  return GS_ALL_DONE;
}

/* Gimplify a LOOP_EXPR.  Normally this just involves gimplifying the body
   and replacing the LOOP_EXPR with goto, but if the loop contains an
   EXIT_EXPR, we need to append a label for it to jump to.  */

static enum gimplify_status
gimplify_loop_expr (tree *expr_p, gimple_seq *pre_p)
{
  tree saved_label = gimplify_ctxp->exit_label;
  tree start_label = create_artificial_label (UNKNOWN_LOCATION);

  gimplify_seq_add_stmt (pre_p, gimple_build_label (start_label));

  gimplify_ctxp->exit_label = NULL_TREE;

  gimplify_and_add (LOOP_EXPR_BODY (*expr_p), pre_p);

  gimplify_seq_add_stmt (pre_p, gimple_build_goto (start_label));

  if (gimplify_ctxp->exit_label)
    gimplify_seq_add_stmt (pre_p,
			   gimple_build_label (gimplify_ctxp->exit_label));

  gimplify_ctxp->exit_label = saved_label;

  *expr_p = NULL;
  return GS_ALL_DONE;
}

/* Gimplify a statement list onto a sequence.  These may be created either
   by an enlightened front-end, or by shortcut_cond_expr.  */

static enum gimplify_status
gimplify_statement_list (tree *expr_p, gimple_seq *pre_p)
{
  tree temp = voidify_wrapper_expr (*expr_p, NULL);

  tree_stmt_iterator i = tsi_start (*expr_p);

  while (!tsi_end_p (i))
    {
      gimplify_stmt (tsi_stmt_ptr (i), pre_p);
      tsi_delink (&i);
    }

  if (temp)
    {
      *expr_p = temp;
      return GS_OK;
    }

  return GS_ALL_DONE;
}


/* Gimplify a SWITCH_EXPR, and collect the vector of labels it can
   branch to.  */

static enum gimplify_status
gimplify_switch_expr (tree *expr_p, gimple_seq *pre_p)
{
  tree switch_expr = *expr_p;
  gimple_seq switch_body_seq = NULL;
  enum gimplify_status ret;
  tree index_type = TREE_TYPE (switch_expr);
  if (index_type == NULL_TREE)
    index_type = TREE_TYPE (SWITCH_COND (switch_expr));

  ret = gimplify_expr (&SWITCH_COND (switch_expr), pre_p, NULL, is_gimple_val,
                       fb_rvalue);
  if (ret == GS_ERROR || ret == GS_UNHANDLED)
    return ret;

  if (SWITCH_BODY (switch_expr))
    {
      vec<tree> labels;
      vec<tree> saved_labels;
      tree default_case = NULL_TREE;
      gimple gimple_switch;

      /* If someone can be bothered to fill in the labels, they can
	 be bothered to null out the body too.  */
      gcc_assert (!SWITCH_LABELS (switch_expr));

      /* Save old labels, get new ones from body, then restore the old
         labels.  Save all the things from the switch body to append after.  */
      saved_labels = gimplify_ctxp->case_labels;
      gimplify_ctxp->case_labels.create (8);

      gimplify_stmt (&SWITCH_BODY (switch_expr), &switch_body_seq);
      labels = gimplify_ctxp->case_labels;
      gimplify_ctxp->case_labels = saved_labels;

      preprocess_case_label_vec_for_gimple (labels, index_type,
					    &default_case);

      if (!default_case)
	{
	  gimple new_default;

	  default_case
	    = build_case_label (NULL_TREE, NULL_TREE,
				create_artificial_label (UNKNOWN_LOCATION));
	  new_default = gimple_build_label (CASE_LABEL (default_case));
	  gimplify_seq_add_stmt (&switch_body_seq, new_default);
	}

      gimple_switch = gimple_build_switch (SWITCH_COND (switch_expr),
					   default_case, labels);
      gimplify_seq_add_stmt (pre_p, gimple_switch);
      gimplify_seq_add_seq (pre_p, switch_body_seq);
      labels.release ();
    }
  else
    gcc_assert (SWITCH_LABELS (switch_expr));

  return GS_ALL_DONE;
}

/* Gimplify the CASE_LABEL_EXPR pointed to by EXPR_P.  */

static enum gimplify_status
gimplify_case_label_expr (tree *expr_p, gimple_seq *pre_p)
{
  struct gimplify_ctx *ctxp;
  gimple gimple_label;

  /* Invalid OpenMP programs can play Duff's Device type games with
     #pragma omp parallel.  At least in the C front end, we don't
     detect such invalid branches until after gimplification.  */
  for (ctxp = gimplify_ctxp; ; ctxp = ctxp->prev_context)
    if (ctxp->case_labels.exists ())
      break;

  gimple_label = gimple_build_label (CASE_LABEL (*expr_p));
  ctxp->case_labels.safe_push (*expr_p);
  gimplify_seq_add_stmt (pre_p, gimple_label);

  return GS_ALL_DONE;
}

/* Build a GOTO to the LABEL_DECL pointed to by LABEL_P, building it first
   if necessary.  */

tree
build_and_jump (tree *label_p)
{
  if (label_p == NULL)
    /* If there's nowhere to jump, just fall through.  */
    return NULL_TREE;

  if (*label_p == NULL_TREE)
    {
      tree label = create_artificial_label (UNKNOWN_LOCATION);
      *label_p = label;
    }

  return build1 (GOTO_EXPR, void_type_node, *label_p);
}

/* Gimplify an EXIT_EXPR by converting to a GOTO_EXPR inside a COND_EXPR.
   This also involves building a label to jump to and communicating it to
   gimplify_loop_expr through gimplify_ctxp->exit_label.  */

static enum gimplify_status
gimplify_exit_expr (tree *expr_p)
{
  tree cond = TREE_OPERAND (*expr_p, 0);
  tree expr;

  expr = build_and_jump (&gimplify_ctxp->exit_label);
  expr = build3 (COND_EXPR, void_type_node, cond, expr, NULL_TREE);
  *expr_p = expr;

  return GS_OK;
}

/* *EXPR_P is a COMPONENT_REF being used as an rvalue.  If its type is
   different from its canonical type, wrap the whole thing inside a
   NOP_EXPR and force the type of the COMPONENT_REF to be the canonical
   type.

   The canonical type of a COMPONENT_REF is the type of the field being
   referenced--unless the field is a bit-field which can be read directly
   in a smaller mode, in which case the canonical type is the
   sign-appropriate type corresponding to that mode.  */

static void
canonicalize_component_ref (tree *expr_p)
{
  tree expr = *expr_p;
  tree type;

  gcc_assert (TREE_CODE (expr) == COMPONENT_REF);

  if (INTEGRAL_TYPE_P (TREE_TYPE (expr)))
    type = TREE_TYPE (get_unwidened (expr, NULL_TREE));
  else
    type = TREE_TYPE (TREE_OPERAND (expr, 1));

  /* One could argue that all the stuff below is not necessary for
     the non-bitfield case and declare it a FE error if type
     adjustment would be needed.  */
  if (TREE_TYPE (expr) != type)
    {
#ifdef ENABLE_TYPES_CHECKING
      tree old_type = TREE_TYPE (expr);
#endif
      int type_quals;

      /* We need to preserve qualifiers and propagate them from
	 operand 0.  */
      type_quals = TYPE_QUALS (type)
	| TYPE_QUALS (TREE_TYPE (TREE_OPERAND (expr, 0)));
      if (TYPE_QUALS (type) != type_quals)
	type = build_qualified_type (TYPE_MAIN_VARIANT (type), type_quals);

      /* Set the type of the COMPONENT_REF to the underlying type.  */
      TREE_TYPE (expr) = type;

#ifdef ENABLE_TYPES_CHECKING
      /* It is now a FE error, if the conversion from the canonical
	 type to the original expression type is not useless.  */
      gcc_assert (useless_type_conversion_p (old_type, type));
#endif
    }
}

/* If a NOP conversion is changing a pointer to array of foo to a pointer
   to foo, embed that change in the ADDR_EXPR by converting
      T array[U];
      (T *)&array
   ==>
      &array[L]
   where L is the lower bound.  For simplicity, only do this for constant
   lower bound.
   The constraint is that the type of &array[L] is trivially convertible
   to T *.  */

static void
canonicalize_addr_expr (tree *expr_p)
{
  tree expr = *expr_p;
  tree addr_expr = TREE_OPERAND (expr, 0);
  tree datype, ddatype, pddatype;

  /* We simplify only conversions from an ADDR_EXPR to a pointer type.  */
  if (!POINTER_TYPE_P (TREE_TYPE (expr))
      || TREE_CODE (addr_expr) != ADDR_EXPR)
    return;

  /* The addr_expr type should be a pointer to an array.  */
  datype = TREE_TYPE (TREE_TYPE (addr_expr));
  if (TREE_CODE (datype) != ARRAY_TYPE)
    return;

  /* The pointer to element type shall be trivially convertible to
     the expression pointer type.  */
  ddatype = TREE_TYPE (datype);
  pddatype = build_pointer_type (ddatype);
  if (!useless_type_conversion_p (TYPE_MAIN_VARIANT (TREE_TYPE (expr)),
				  pddatype))
    return;

  /* The lower bound and element sizes must be constant.  */
  if (!TYPE_SIZE_UNIT (ddatype)
      || TREE_CODE (TYPE_SIZE_UNIT (ddatype)) != INTEGER_CST
      || !TYPE_DOMAIN (datype) || !TYPE_MIN_VALUE (TYPE_DOMAIN (datype))
      || TREE_CODE (TYPE_MIN_VALUE (TYPE_DOMAIN (datype))) != INTEGER_CST)
    return;

  /* All checks succeeded.  Build a new node to merge the cast.  */
  *expr_p = build4 (ARRAY_REF, ddatype, TREE_OPERAND (addr_expr, 0),
		    TYPE_MIN_VALUE (TYPE_DOMAIN (datype)),
		    NULL_TREE, NULL_TREE);
  *expr_p = build1 (ADDR_EXPR, pddatype, *expr_p);

  /* We can have stripped a required restrict qualifier above.  */
  if (!useless_type_conversion_p (TREE_TYPE (expr), TREE_TYPE (*expr_p)))
    *expr_p = fold_convert (TREE_TYPE (expr), *expr_p);
}

/* *EXPR_P is a NOP_EXPR or CONVERT_EXPR.  Remove it and/or other conversions
   underneath as appropriate.  */

static enum gimplify_status
gimplify_conversion (tree *expr_p)
{
  location_t loc = EXPR_LOCATION (*expr_p);
  gcc_assert (CONVERT_EXPR_P (*expr_p));

  /* Then strip away all but the outermost conversion.  */
  STRIP_SIGN_NOPS (TREE_OPERAND (*expr_p, 0));

  /* And remove the outermost conversion if it's useless.  */
  if (tree_ssa_useless_type_conversion (*expr_p))
    *expr_p = TREE_OPERAND (*expr_p, 0);

  /* If we still have a conversion at the toplevel,
     then canonicalize some constructs.  */
  if (CONVERT_EXPR_P (*expr_p))
    {
      tree sub = TREE_OPERAND (*expr_p, 0);

      /* If a NOP conversion is changing the type of a COMPONENT_REF
	 expression, then canonicalize its type now in order to expose more
	 redundant conversions.  */
      if (TREE_CODE (sub) == COMPONENT_REF)
	canonicalize_component_ref (&TREE_OPERAND (*expr_p, 0));

      /* If a NOP conversion is changing a pointer to array of foo
	 to a pointer to foo, embed that change in the ADDR_EXPR.  */
      else if (TREE_CODE (sub) == ADDR_EXPR)
	canonicalize_addr_expr (expr_p);
    }

  /* If we have a conversion to a non-register type force the
     use of a VIEW_CONVERT_EXPR instead.  */
  if (CONVERT_EXPR_P (*expr_p) && !is_gimple_reg_type (TREE_TYPE (*expr_p)))
    *expr_p = fold_build1_loc (loc, VIEW_CONVERT_EXPR, TREE_TYPE (*expr_p),
			       TREE_OPERAND (*expr_p, 0));

  return GS_OK;
}

/* Nonlocal VLAs seen in the current function.  */
static struct pointer_set_t *nonlocal_vlas;

/* The VAR_DECLs created for nonlocal VLAs for debug info purposes.  */
static tree nonlocal_vla_vars;

/* Gimplify a VAR_DECL or PARM_DECL.  Return GS_OK if we expanded a
   DECL_VALUE_EXPR, and it's worth re-examining things.  */

static enum gimplify_status
gimplify_var_or_parm_decl (tree *expr_p)
{
  tree decl = *expr_p;

  /* ??? If this is a local variable, and it has not been seen in any
     outer BIND_EXPR, then it's probably the result of a duplicate
     declaration, for which we've already issued an error.  It would
     be really nice if the front end wouldn't leak these at all.
     Currently the only known culprit is C++ destructors, as seen
     in g++.old-deja/g++.jason/binding.C.  */
  if (TREE_CODE (decl) == VAR_DECL
      && !DECL_SEEN_IN_BIND_EXPR_P (decl)
      && !TREE_STATIC (decl) && !DECL_EXTERNAL (decl)
      && decl_function_context (decl) == current_function_decl)
    {
      gcc_assert (seen_error ());
      return GS_ERROR;
    }

  /* When within an OpenMP context, notice uses of variables.  */
  if (gimplify_omp_ctxp && omp_notice_variable (gimplify_omp_ctxp, decl, true))
    return GS_ALL_DONE;

  /* If the decl is an alias for another expression, substitute it now.  */
  if (DECL_HAS_VALUE_EXPR_P (decl))
    {
      tree value_expr = DECL_VALUE_EXPR (decl);

      /* For referenced nonlocal VLAs add a decl for debugging purposes
	 to the current function.  */
      if (TREE_CODE (decl) == VAR_DECL
	  && TREE_CODE (DECL_SIZE_UNIT (decl)) != INTEGER_CST
	  && nonlocal_vlas != NULL
	  && TREE_CODE (value_expr) == INDIRECT_REF
	  && TREE_CODE (TREE_OPERAND (value_expr, 0)) == VAR_DECL
	  && decl_function_context (decl) != current_function_decl)
	{
	  struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp;
	  while (ctx
		 && (ctx->region_type == ORT_WORKSHARE
		     || ctx->region_type == ORT_SIMD))
	    ctx = ctx->outer_context;
	  if (!ctx && !pointer_set_insert (nonlocal_vlas, decl))
	    {
	      tree copy = copy_node (decl);

	      lang_hooks.dup_lang_specific_decl (copy);
	      SET_DECL_RTL (copy, 0);
	      TREE_USED (copy) = 1;
	      DECL_CHAIN (copy) = nonlocal_vla_vars;
	      nonlocal_vla_vars = copy;
	      SET_DECL_VALUE_EXPR (copy, unshare_expr (value_expr));
	      DECL_HAS_VALUE_EXPR_P (copy) = 1;
	    }
	}

      *expr_p = unshare_expr (value_expr);
      return GS_OK;
    }

  return GS_ALL_DONE;
}

/* Recalculate the value of the TREE_SIDE_EFFECTS flag for T.  */

static void
recalculate_side_effects (tree t)
{
  enum tree_code code = TREE_CODE (t);
  int len = TREE_OPERAND_LENGTH (t);
  int i;

  switch (TREE_CODE_CLASS (code))
    {
    case tcc_expression:
      switch (code)
	{
	case INIT_EXPR:
	case MODIFY_EXPR:
	case VA_ARG_EXPR:
	case PREDECREMENT_EXPR:
	case PREINCREMENT_EXPR:
	case POSTDECREMENT_EXPR:
	case POSTINCREMENT_EXPR:
	  /* All of these have side-effects, no matter what their
	     operands are.  */
	  return;

	default:
	  break;
	}
      /* Fall through.  */

    case tcc_comparison:  /* a comparison expression */
    case tcc_unary:       /* a unary arithmetic expression */
    case tcc_binary:      /* a binary arithmetic expression */
    case tcc_reference:   /* a reference */
    case tcc_vl_exp:        /* a function call */
      TREE_SIDE_EFFECTS (t) = TREE_THIS_VOLATILE (t);
      for (i = 0; i < len; ++i)
	{
	  tree op = TREE_OPERAND (t, i);
	  if (op && TREE_SIDE_EFFECTS (op))
	    TREE_SIDE_EFFECTS (t) = 1;
	}
      break;

    case tcc_constant:
      /* No side-effects.  */
      return;

    default:
      gcc_unreachable ();
   }
}

/* Gimplify the COMPONENT_REF, ARRAY_REF, REALPART_EXPR or IMAGPART_EXPR
   node *EXPR_P.

      compound_lval
	      : min_lval '[' val ']'
	      | min_lval '.' ID
	      | compound_lval '[' val ']'
	      | compound_lval '.' ID

   This is not part of the original SIMPLE definition, which separates
   array and member references, but it seems reasonable to handle them
   together.  Also, this way we don't run into problems with union
   aliasing; gcc requires that for accesses through a union to alias, the
   union reference must be explicit, which was not always the case when we
   were splitting up array and member refs.

   PRE_P points to the sequence where side effects that must happen before
     *EXPR_P should be stored.

   POST_P points to the sequence where side effects that must happen after
     *EXPR_P should be stored.  */

static enum gimplify_status
gimplify_compound_lval (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
			fallback_t fallback)
{
  tree *p;
  enum gimplify_status ret = GS_ALL_DONE, tret;
  int i;
  location_t loc = EXPR_LOCATION (*expr_p);
  tree expr = *expr_p;

  /* Create a stack of the subexpressions so later we can walk them in
     order from inner to outer.  */
  auto_vec<tree, 10> expr_stack;

  /* We can handle anything that get_inner_reference can deal with.  */
  for (p = expr_p; ; p = &TREE_OPERAND (*p, 0))
    {
    restart:
      /* Fold INDIRECT_REFs now to turn them into ARRAY_REFs.  */
      if (TREE_CODE (*p) == INDIRECT_REF)
	*p = fold_indirect_ref_loc (loc, *p);

      if (handled_component_p (*p))
	;
      /* Expand DECL_VALUE_EXPR now.  In some cases that may expose
	 additional COMPONENT_REFs.  */
      else if ((TREE_CODE (*p) == VAR_DECL || TREE_CODE (*p) == PARM_DECL)
	       && gimplify_var_or_parm_decl (p) == GS_OK)
	goto restart;
      else
	break;

      expr_stack.safe_push (*p);
    }

  gcc_assert (expr_stack.length ());

  /* Now EXPR_STACK is a stack of pointers to all the refs we've
     walked through and P points to the innermost expression.

     Java requires that we elaborated nodes in source order.  That
     means we must gimplify the inner expression followed by each of
     the indices, in order.  But we can't gimplify the inner
     expression until we deal with any variable bounds, sizes, or
     positions in order to deal with PLACEHOLDER_EXPRs.

     So we do this in three steps.  First we deal with the annotations
     for any variables in the components, then we gimplify the base,
     then we gimplify any indices, from left to right.  */
  for (i = expr_stack.length () - 1; i >= 0; i--)
    {
      tree t = expr_stack[i];

      if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF)
	{
	  /* Gimplify the low bound and element type size and put them into
	     the ARRAY_REF.  If these values are set, they have already been
	     gimplified.  */
	  if (TREE_OPERAND (t, 2) == NULL_TREE)
	    {
	      tree low = unshare_expr (array_ref_low_bound (t));
	      if (!is_gimple_min_invariant (low))
		{
		  TREE_OPERAND (t, 2) = low;
		  tret = gimplify_expr (&TREE_OPERAND (t, 2), pre_p,
					post_p, is_gimple_reg,
					fb_rvalue);
		  ret = MIN (ret, tret);
		}
	    }
	  else
	    {
	      tret = gimplify_expr (&TREE_OPERAND (t, 2), pre_p, post_p,
				    is_gimple_reg, fb_rvalue);
	      ret = MIN (ret, tret);
	    }

	  if (TREE_OPERAND (t, 3) == NULL_TREE)
	    {
	      tree elmt_type = TREE_TYPE (TREE_TYPE (TREE_OPERAND (t, 0)));
	      tree elmt_size = unshare_expr (array_ref_element_size (t));
	      tree factor = size_int (TYPE_ALIGN_UNIT (elmt_type));

	      /* Divide the element size by the alignment of the element
		 type (above).  */
	      elmt_size
		= size_binop_loc (loc, EXACT_DIV_EXPR, elmt_size, factor);

	      if (!is_gimple_min_invariant (elmt_size))
		{
		  TREE_OPERAND (t, 3) = elmt_size;
		  tret = gimplify_expr (&TREE_OPERAND (t, 3), pre_p,
					post_p, is_gimple_reg,
					fb_rvalue);
		  ret = MIN (ret, tret);
		}
	    }
	  else
	    {
	      tret = gimplify_expr (&TREE_OPERAND (t, 3), pre_p, post_p,
				    is_gimple_reg, fb_rvalue);
	      ret = MIN (ret, tret);
	    }
	}
      else if (TREE_CODE (t) == COMPONENT_REF)
	{
	  /* Set the field offset into T and gimplify it.  */
	  if (TREE_OPERAND (t, 2) == NULL_TREE)
	    {
	      tree offset = unshare_expr (component_ref_field_offset (t));
	      tree field = TREE_OPERAND (t, 1);
	      tree factor
		= size_int (DECL_OFFSET_ALIGN (field) / BITS_PER_UNIT);

	      /* Divide the offset by its alignment.  */
	      offset = size_binop_loc (loc, EXACT_DIV_EXPR, offset, factor);

	      if (!is_gimple_min_invariant (offset))
		{
		  TREE_OPERAND (t, 2) = offset;
		  tret = gimplify_expr (&TREE_OPERAND (t, 2), pre_p,
					post_p, is_gimple_reg,
					fb_rvalue);
		  ret = MIN (ret, tret);
		}
	    }
	  else
	    {
	      tret = gimplify_expr (&TREE_OPERAND (t, 2), pre_p, post_p,
				    is_gimple_reg, fb_rvalue);
	      ret = MIN (ret, tret);
	    }
	}
    }

  /* Step 2 is to gimplify the base expression.  Make sure lvalue is set
     so as to match the min_lval predicate.  Failure to do so may result
     in the creation of large aggregate temporaries.  */
  tret = gimplify_expr (p, pre_p, post_p, is_gimple_min_lval,
			fallback | fb_lvalue);
  ret = MIN (ret, tret);

  /* And finally, the indices and operands of ARRAY_REF.  During this
     loop we also remove any useless conversions.  */
  for (; expr_stack.length () > 0; )
    {
      tree t = expr_stack.pop ();

      if (TREE_CODE (t) == ARRAY_REF || TREE_CODE (t) == ARRAY_RANGE_REF)
	{
	  /* Gimplify the dimension.  */
	  if (!is_gimple_min_invariant (TREE_OPERAND (t, 1)))
	    {
	      tret = gimplify_expr (&TREE_OPERAND (t, 1), pre_p, post_p,
				    is_gimple_val, fb_rvalue);
	      ret = MIN (ret, tret);
	    }
	}

      STRIP_USELESS_TYPE_CONVERSION (TREE_OPERAND (t, 0));

      /* The innermost expression P may have originally had
	 TREE_SIDE_EFFECTS set which would have caused all the outer
	 expressions in *EXPR_P leading to P to also have had
	 TREE_SIDE_EFFECTS set.  */
      recalculate_side_effects (t);
    }

  /* If the outermost expression is a COMPONENT_REF, canonicalize its type.  */
  if ((fallback & fb_rvalue) && TREE_CODE (*expr_p) == COMPONENT_REF)
    {
      canonicalize_component_ref (expr_p);
    }

  expr_stack.release ();

  gcc_assert (*expr_p == expr || ret != GS_ALL_DONE);

  return ret;
}

/*  Gimplify the self modifying expression pointed to by EXPR_P
    (++, --, +=, -=).

    PRE_P points to the list where side effects that must happen before
	*EXPR_P should be stored.

    POST_P points to the list where side effects that must happen after
	*EXPR_P should be stored.

    WANT_VALUE is nonzero iff we want to use the value of this expression
	in another expression.

    ARITH_TYPE is the type the computation should be performed in.  */

enum gimplify_status
gimplify_self_mod_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
			bool want_value, tree arith_type)
{
  enum tree_code code;
  tree lhs, lvalue, rhs, t1;
  gimple_seq post = NULL, *orig_post_p = post_p;
  bool postfix;
  enum tree_code arith_code;
  enum gimplify_status ret;
  location_t loc = EXPR_LOCATION (*expr_p);

  code = TREE_CODE (*expr_p);

  gcc_assert (code == POSTINCREMENT_EXPR || code == POSTDECREMENT_EXPR
	      || code == PREINCREMENT_EXPR || code == PREDECREMENT_EXPR);

  /* Prefix or postfix?  */
  if (code == POSTINCREMENT_EXPR || code == POSTDECREMENT_EXPR)
    /* Faster to treat as prefix if result is not used.  */
    postfix = want_value;
  else
    postfix = false;

  /* For postfix, make sure the inner expression's post side effects
     are executed after side effects from this expression.  */
  if (postfix)
    post_p = &post;

  /* Add or subtract?  */
  if (code == PREINCREMENT_EXPR || code == POSTINCREMENT_EXPR)
    arith_code = PLUS_EXPR;
  else
    arith_code = MINUS_EXPR;

  /* Gimplify the LHS into a GIMPLE lvalue.  */
  lvalue = TREE_OPERAND (*expr_p, 0);
  ret = gimplify_expr (&lvalue, pre_p, post_p, is_gimple_lvalue, fb_lvalue);
  if (ret == GS_ERROR)
    return ret;

  /* Extract the operands to the arithmetic operation.  */
  lhs = lvalue;
  rhs = TREE_OPERAND (*expr_p, 1);

  /* For postfix operator, we evaluate the LHS to an rvalue and then use
     that as the result value and in the postqueue operation.  */
  if (postfix)
    {
      ret = gimplify_expr (&lhs, pre_p, post_p, is_gimple_val, fb_rvalue);
      if (ret == GS_ERROR)
	return ret;

      lhs = get_initialized_tmp_var (lhs, pre_p, NULL);
    }

  /* For POINTERs increment, use POINTER_PLUS_EXPR.  */
  if (POINTER_TYPE_P (TREE_TYPE (lhs)))
    {
      rhs = convert_to_ptrofftype_loc (loc, rhs);
      if (arith_code == MINUS_EXPR)
	rhs = fold_build1_loc (loc, NEGATE_EXPR, TREE_TYPE (rhs), rhs);
      t1 = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (*expr_p), lhs, rhs);
    }
  else
    t1 = fold_convert (TREE_TYPE (*expr_p),
		       fold_build2 (arith_code, arith_type,
				    fold_convert (arith_type, lhs),
				    fold_convert (arith_type, rhs)));

  if (postfix)
    {
      gimplify_assign (lvalue, t1, pre_p);
      gimplify_seq_add_seq (orig_post_p, post);
      *expr_p = lhs;
      return GS_ALL_DONE;
    }
  else
    {
      *expr_p = build2 (MODIFY_EXPR, TREE_TYPE (lvalue), lvalue, t1);
      return GS_OK;
    }
}

/* If *EXPR_P has a variable sized type, wrap it in a WITH_SIZE_EXPR.  */

static void
maybe_with_size_expr (tree *expr_p)
{
  tree expr = *expr_p;
  tree type = TREE_TYPE (expr);
  tree size;

  /* If we've already wrapped this or the type is error_mark_node, we can't do
     anything.  */
  if (TREE_CODE (expr) == WITH_SIZE_EXPR
      || type == error_mark_node)
    return;

  /* If the size isn't known or is a constant, we have nothing to do.  */
  size = TYPE_SIZE_UNIT (type);
  if (!size || TREE_CODE (size) == INTEGER_CST)
    return;

  /* Otherwise, make a WITH_SIZE_EXPR.  */
  size = unshare_expr (size);
  size = SUBSTITUTE_PLACEHOLDER_IN_EXPR (size, expr);
  *expr_p = build2 (WITH_SIZE_EXPR, type, expr, size);
}

/* Helper for gimplify_call_expr.  Gimplify a single argument *ARG_P
   Store any side-effects in PRE_P.  CALL_LOCATION is the location of
   the CALL_EXPR.  */

enum gimplify_status
gimplify_arg (tree *arg_p, gimple_seq *pre_p, location_t call_location)
{
  bool (*test) (tree);
  fallback_t fb;

  /* In general, we allow lvalues for function arguments to avoid
     extra overhead of copying large aggregates out of even larger
     aggregates into temporaries only to copy the temporaries to
     the argument list.  Make optimizers happy by pulling out to
     temporaries those types that fit in registers.  */
  if (is_gimple_reg_type (TREE_TYPE (*arg_p)))
    test = is_gimple_val, fb = fb_rvalue;
  else
    {
      test = is_gimple_lvalue, fb = fb_either;
      /* Also strip a TARGET_EXPR that would force an extra copy.  */
      if (TREE_CODE (*arg_p) == TARGET_EXPR)
	{
	  tree init = TARGET_EXPR_INITIAL (*arg_p);
	  if (init
	      && !VOID_TYPE_P (TREE_TYPE (init)))
	    *arg_p = init;
	}
    }

  /* If this is a variable sized type, we must remember the size.  */
  maybe_with_size_expr (arg_p);

  /* FIXME diagnostics: This will mess up gcc.dg/Warray-bounds.c.  */
  /* Make sure arguments have the same location as the function call
     itself.  */
  protected_set_expr_location (*arg_p, call_location);

  /* There is a sequence point before a function call.  Side effects in
     the argument list must occur before the actual call. So, when
     gimplifying arguments, force gimplify_expr to use an internal
     post queue which is then appended to the end of PRE_P.  */
  return gimplify_expr (arg_p, pre_p, NULL, test, fb);
}

/* Don't fold STMT inside ORT_TARGET, because it can break code by adding decl
   references that weren't in the source.  We'll do it during omplower pass
   instead.  */

static bool
maybe_fold_stmt (gimple_stmt_iterator *gsi)
{
  struct gimplify_omp_ctx *ctx;
  for (ctx = gimplify_omp_ctxp; ctx; ctx = ctx->outer_context)
    if (ctx->region_type == ORT_TARGET)
      return false;
  return fold_stmt (gsi);
}

/* Gimplify the CALL_EXPR node *EXPR_P into the GIMPLE sequence PRE_P.
   WANT_VALUE is true if the result of the call is desired.  */

static enum gimplify_status
gimplify_call_expr (tree *expr_p, gimple_seq *pre_p, bool want_value)
{
  tree fndecl, parms, p, fnptrtype;
  enum gimplify_status ret;
  int i, nargs;
  gimple call;
  bool builtin_va_start_p = false;
  location_t loc = EXPR_LOCATION (*expr_p);

  gcc_assert (TREE_CODE (*expr_p) == CALL_EXPR);

  /* For reliable diagnostics during inlining, it is necessary that
     every call_expr be annotated with file and line.  */
  if (! EXPR_HAS_LOCATION (*expr_p))
    SET_EXPR_LOCATION (*expr_p, input_location);

  /* This may be a call to a builtin function.

     Builtin function calls may be transformed into different
     (and more efficient) builtin function calls under certain
     circumstances.  Unfortunately, gimplification can muck things
     up enough that the builtin expanders are not aware that certain
     transformations are still valid.

     So we attempt transformation/gimplification of the call before
     we gimplify the CALL_EXPR.  At this time we do not manage to
     transform all calls in the same manner as the expanders do, but
     we do transform most of them.  */
  fndecl = get_callee_fndecl (*expr_p);
  if (fndecl
      && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
    switch (DECL_FUNCTION_CODE (fndecl))
      {
      case BUILT_IN_VA_START:
        {
	  builtin_va_start_p = TRUE;
	  if (call_expr_nargs (*expr_p) < 2)
	    {
	      error ("too few arguments to function %<va_start%>");
	      *expr_p = build_empty_stmt (EXPR_LOCATION (*expr_p));
	      return GS_OK;
	    }

	  if (fold_builtin_next_arg (*expr_p, true))
	    {
	      *expr_p = build_empty_stmt (EXPR_LOCATION (*expr_p));
	      return GS_OK;
	    }
	  break;
	}
      case BUILT_IN_LINE:
	{
	  expanded_location loc = expand_location (EXPR_LOCATION (*expr_p));
	  *expr_p = build_int_cst (TREE_TYPE (*expr_p), loc.line);
	  return GS_OK;
	}
      case BUILT_IN_FILE:
	{
	  expanded_location loc = expand_location (EXPR_LOCATION (*expr_p));
	  *expr_p = build_string_literal (strlen (loc.file) + 1, loc.file);
	  return GS_OK;
	}
      case BUILT_IN_FUNCTION:
	{
	  const char *function;
	  function = IDENTIFIER_POINTER (DECL_NAME (current_function_decl));
	  *expr_p = build_string_literal (strlen (function) + 1, function);
	  return GS_OK;
	}
      default:
        ;
      }
  if (fndecl && DECL_BUILT_IN (fndecl))
    {
      tree new_tree = fold_call_expr (input_location, *expr_p, !want_value);
      if (new_tree && new_tree != *expr_p)
	{
	  /* There was a transformation of this call which computes the
	     same value, but in a more efficient way.  Return and try
	     again.  */
	  *expr_p = new_tree;
	  return GS_OK;
	}
    }

  /* Remember the original function pointer type.  */
  fnptrtype = TREE_TYPE (CALL_EXPR_FN (*expr_p));

  /* There is a sequence point before the call, so any side effects in
     the calling expression must occur before the actual call.  Force
     gimplify_expr to use an internal post queue.  */
  ret = gimplify_expr (&CALL_EXPR_FN (*expr_p), pre_p, NULL,
		       is_gimple_call_addr, fb_rvalue);

  nargs = call_expr_nargs (*expr_p);

  /* Get argument types for verification.  */
  fndecl = get_callee_fndecl (*expr_p);
  parms = NULL_TREE;
  if (fndecl)
    parms = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
  else if (POINTER_TYPE_P (TREE_TYPE (CALL_EXPR_FN (*expr_p))))
    parms = TYPE_ARG_TYPES (TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (*expr_p))));

  if (fndecl && DECL_ARGUMENTS (fndecl))
    p = DECL_ARGUMENTS (fndecl);
  else if (parms)
    p = parms;
  else
    p = NULL_TREE;
  for (i = 0; i < nargs && p; i++, p = TREE_CHAIN (p))
    ;

  /* If the last argument is __builtin_va_arg_pack () and it is not
     passed as a named argument, decrease the number of CALL_EXPR
     arguments and set instead the CALL_EXPR_VA_ARG_PACK flag.  */
  if (!p
      && i < nargs
      && TREE_CODE (CALL_EXPR_ARG (*expr_p, nargs - 1)) == CALL_EXPR)
    {
      tree last_arg = CALL_EXPR_ARG (*expr_p, nargs - 1);
      tree last_arg_fndecl = get_callee_fndecl (last_arg);

      if (last_arg_fndecl
	  && TREE_CODE (last_arg_fndecl) == FUNCTION_DECL
	  && DECL_BUILT_IN_CLASS (last_arg_fndecl) == BUILT_IN_NORMAL
	  && DECL_FUNCTION_CODE (last_arg_fndecl) == BUILT_IN_VA_ARG_PACK)
	{
	  tree call = *expr_p;

	  --nargs;
	  *expr_p = build_call_array_loc (loc, TREE_TYPE (call),
					  CALL_EXPR_FN (call),
					  nargs, CALL_EXPR_ARGP (call));

	  /* Copy all CALL_EXPR flags, location and block, except
	     CALL_EXPR_VA_ARG_PACK flag.  */
	  CALL_EXPR_STATIC_CHAIN (*expr_p) = CALL_EXPR_STATIC_CHAIN (call);
	  CALL_EXPR_TAILCALL (*expr_p) = CALL_EXPR_TAILCALL (call);
	  CALL_EXPR_RETURN_SLOT_OPT (*expr_p)
	    = CALL_EXPR_RETURN_SLOT_OPT (call);
	  CALL_FROM_THUNK_P (*expr_p) = CALL_FROM_THUNK_P (call);
	  SET_EXPR_LOCATION (*expr_p, EXPR_LOCATION (call));

	  /* Set CALL_EXPR_VA_ARG_PACK.  */
	  CALL_EXPR_VA_ARG_PACK (*expr_p) = 1;
	}
    }

  /* Finally, gimplify the function arguments.  */
  if (nargs > 0)
    {
      for (i = (PUSH_ARGS_REVERSED ? nargs - 1 : 0);
           PUSH_ARGS_REVERSED ? i >= 0 : i < nargs;
           PUSH_ARGS_REVERSED ? i-- : i++)
        {
          enum gimplify_status t;

          /* Avoid gimplifying the second argument to va_start, which needs to
             be the plain PARM_DECL.  */
          if ((i != 1) || !builtin_va_start_p)
            {
              t = gimplify_arg (&CALL_EXPR_ARG (*expr_p, i), pre_p,
				EXPR_LOCATION (*expr_p));

              if (t == GS_ERROR)
                ret = GS_ERROR;
            }
        }
    }

  /* Verify the function result.  */
  if (want_value && fndecl
      && VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fnptrtype))))
    {
      error_at (loc, "using result of function returning %<void%>");
      ret = GS_ERROR;
    }

  /* Try this again in case gimplification exposed something.  */
  if (ret != GS_ERROR)
    {
      tree new_tree = fold_call_expr (input_location, *expr_p, !want_value);

      if (new_tree && new_tree != *expr_p)
	{
	  /* There was a transformation of this call which computes the
	     same value, but in a more efficient way.  Return and try
	     again.  */
	  *expr_p = new_tree;
	  return GS_OK;
	}
    }
  else
    {
      *expr_p = error_mark_node;
      return GS_ERROR;
    }

  /* If the function is "const" or "pure", then clear TREE_SIDE_EFFECTS on its
     decl.  This allows us to eliminate redundant or useless
     calls to "const" functions.  */
  if (TREE_CODE (*expr_p) == CALL_EXPR)
    {
      int flags = call_expr_flags (*expr_p);
      if (flags & (ECF_CONST | ECF_PURE)
	  /* An infinite loop is considered a side effect.  */
	  && !(flags & (ECF_LOOPING_CONST_OR_PURE)))
	TREE_SIDE_EFFECTS (*expr_p) = 0;
    }

  /* If the value is not needed by the caller, emit a new GIMPLE_CALL
     and clear *EXPR_P.  Otherwise, leave *EXPR_P in its gimplified
     form and delegate the creation of a GIMPLE_CALL to
     gimplify_modify_expr.  This is always possible because when
     WANT_VALUE is true, the caller wants the result of this call into
     a temporary, which means that we will emit an INIT_EXPR in
     internal_get_tmp_var which will then be handled by
     gimplify_modify_expr.  */
  if (!want_value)
    {
      /* The CALL_EXPR in *EXPR_P is already in GIMPLE form, so all we
	 have to do is replicate it as a GIMPLE_CALL tuple.  */
      gimple_stmt_iterator gsi;
      call = gimple_build_call_from_tree (*expr_p);
      gimple_call_set_fntype (call, TREE_TYPE (fnptrtype));
      notice_special_calls (call);
      gimplify_seq_add_stmt (pre_p, call);
      gsi = gsi_last (*pre_p);
      maybe_fold_stmt (&gsi);
      *expr_p = NULL_TREE;
    }
  else
    /* Remember the original function type.  */
    CALL_EXPR_FN (*expr_p) = build1 (NOP_EXPR, fnptrtype,
				     CALL_EXPR_FN (*expr_p));

  return ret;
}

/* Handle shortcut semantics in the predicate operand of a COND_EXPR by
   rewriting it into multiple COND_EXPRs, and possibly GOTO_EXPRs.

   TRUE_LABEL_P and FALSE_LABEL_P point to the labels to jump to if the
   condition is true or false, respectively.  If null, we should generate
   our own to skip over the evaluation of this specific expression.

   LOCUS is the source location of the COND_EXPR.

   This function is the tree equivalent of do_jump.

   shortcut_cond_r should only be called by shortcut_cond_expr.  */

static tree
shortcut_cond_r (tree pred, tree *true_label_p, tree *false_label_p,
		 location_t locus)
{
  tree local_label = NULL_TREE;
  tree t, expr = NULL;

  /* OK, it's not a simple case; we need to pull apart the COND_EXPR to
     retain the shortcut semantics.  Just insert the gotos here;
     shortcut_cond_expr will append the real blocks later.  */
  if (TREE_CODE (pred) == TRUTH_ANDIF_EXPR)
    {
      location_t new_locus;

      /* Turn if (a && b) into

	 if (a); else goto no;
	 if (b) goto yes; else goto no;
	 (no:) */

      if (false_label_p == NULL)
	false_label_p = &local_label;

      /* Keep the original source location on the first 'if'.  */
      t = shortcut_cond_r (TREE_OPERAND (pred, 0), NULL, false_label_p, locus);
      append_to_statement_list (t, &expr);

      /* Set the source location of the && on the second 'if'.  */
      new_locus = EXPR_HAS_LOCATION (pred) ? EXPR_LOCATION (pred) : locus;
      t = shortcut_cond_r (TREE_OPERAND (pred, 1), true_label_p, false_label_p,
			   new_locus);
      append_to_statement_list (t, &expr);
    }
  else if (TREE_CODE (pred) == TRUTH_ORIF_EXPR)
    {
      location_t new_locus;

      /* Turn if (a || b) into

	 if (a) goto yes;
	 if (b) goto yes; else goto no;
	 (yes:) */

      if (true_label_p == NULL)
	true_label_p = &local_label;

      /* Keep the original source location on the first 'if'.  */
      t = shortcut_cond_r (TREE_OPERAND (pred, 0), true_label_p, NULL, locus);
      append_to_statement_list (t, &expr);

      /* Set the source location of the || on the second 'if'.  */
      new_locus = EXPR_HAS_LOCATION (pred) ? EXPR_LOCATION (pred) : locus;
      t = shortcut_cond_r (TREE_OPERAND (pred, 1), true_label_p, false_label_p,
			   new_locus);
      append_to_statement_list (t, &expr);
    }
  else if (TREE_CODE (pred) == COND_EXPR
	   && !VOID_TYPE_P (TREE_TYPE (TREE_OPERAND (pred, 1)))
	   && !VOID_TYPE_P (TREE_TYPE (TREE_OPERAND (pred, 2))))
    {
      location_t new_locus;

      /* As long as we're messing with gotos, turn if (a ? b : c) into
	 if (a)
	   if (b) goto yes; else goto no;
	 else
	   if (c) goto yes; else goto no;

	 Don't do this if one of the arms has void type, which can happen
	 in C++ when the arm is throw.  */

      /* Keep the original source location on the first 'if'.  Set the source
	 location of the ? on the second 'if'.  */
      new_locus = EXPR_HAS_LOCATION (pred) ? EXPR_LOCATION (pred) : locus;
      expr = build3 (COND_EXPR, void_type_node, TREE_OPERAND (pred, 0),
		     shortcut_cond_r (TREE_OPERAND (pred, 1), true_label_p,
				      false_label_p, locus),
		     shortcut_cond_r (TREE_OPERAND (pred, 2), true_label_p,
				      false_label_p, new_locus));
    }
  else
    {
      expr = build3 (COND_EXPR, void_type_node, pred,
		     build_and_jump (true_label_p),
		     build_and_jump (false_label_p));
      SET_EXPR_LOCATION (expr, locus);
    }

  if (local_label)
    {
      t = build1 (LABEL_EXPR, void_type_node, local_label);
      append_to_statement_list (t, &expr);
    }

  return expr;
}

/* Given a conditional expression EXPR with short-circuit boolean
   predicates using TRUTH_ANDIF_EXPR or TRUTH_ORIF_EXPR, break the
   predicate apart into the equivalent sequence of conditionals.  */

static tree
shortcut_cond_expr (tree expr)
{
  tree pred = TREE_OPERAND (expr, 0);
  tree then_ = TREE_OPERAND (expr, 1);
  tree else_ = TREE_OPERAND (expr, 2);
  tree true_label, false_label, end_label, t;
  tree *true_label_p;
  tree *false_label_p;
  bool emit_end, emit_false, jump_over_else;
  bool then_se = then_ && TREE_SIDE_EFFECTS (then_);
  bool else_se = else_ && TREE_SIDE_EFFECTS (else_);

  /* First do simple transformations.  */
  if (!else_se)
    {
      /* If there is no 'else', turn
	   if (a && b) then c
	 into
	   if (a) if (b) then c.  */
      while (TREE_CODE (pred) == TRUTH_ANDIF_EXPR)
	{
	  /* Keep the original source location on the first 'if'.  */
	  location_t locus = EXPR_LOC_OR_LOC (expr, input_location);
	  TREE_OPERAND (expr, 0) = TREE_OPERAND (pred, 1);
	  /* Set the source location of the && on the second 'if'.  */
	  if (EXPR_HAS_LOCATION (pred))
	    SET_EXPR_LOCATION (expr, EXPR_LOCATION (pred));
	  then_ = shortcut_cond_expr (expr);
	  then_se = then_ && TREE_SIDE_EFFECTS (then_);
	  pred = TREE_OPERAND (pred, 0);
	  expr = build3 (COND_EXPR, void_type_node, pred, then_, NULL_TREE);
	  SET_EXPR_LOCATION (expr, locus);
	}
    }

  if (!then_se)
    {
      /* If there is no 'then', turn
	   if (a || b); else d
	 into
	   if (a); else if (b); else d.  */
      while (TREE_CODE (pred) == TRUTH_ORIF_EXPR)
	{
	  /* Keep the original source location on the first 'if'.  */
	  location_t locus = EXPR_LOC_OR_LOC (expr, input_location);
	  TREE_OPERAND (expr, 0) = TREE_OPERAND (pred, 1);
	  /* Set the source location of the || on the second 'if'.  */
	  if (EXPR_HAS_LOCATION (pred))
	    SET_EXPR_LOCATION (expr, EXPR_LOCATION (pred));
	  else_ = shortcut_cond_expr (expr);
	  else_se = else_ && TREE_SIDE_EFFECTS (else_);
	  pred = TREE_OPERAND (pred, 0);
	  expr = build3 (COND_EXPR, void_type_node, pred, NULL_TREE, else_);
	  SET_EXPR_LOCATION (expr, locus);
	}
    }

  /* If we're done, great.  */
  if (TREE_CODE (pred) != TRUTH_ANDIF_EXPR
      && TREE_CODE (pred) != TRUTH_ORIF_EXPR)
    return expr;

  /* Otherwise we need to mess with gotos.  Change
       if (a) c; else d;
     to
       if (a); else goto no;
       c; goto end;
       no: d; end:
     and recursively gimplify the condition.  */

  true_label = false_label = end_label = NULL_TREE;

  /* If our arms just jump somewhere, hijack those labels so we don't
     generate jumps to jumps.  */

  if (then_
      && TREE_CODE (then_) == GOTO_EXPR
      && TREE_CODE (GOTO_DESTINATION (then_)) == LABEL_DECL)
    {
      true_label = GOTO_DESTINATION (then_);
      then_ = NULL;
      then_se = false;
    }

  if (else_
      && TREE_CODE (else_) == GOTO_EXPR
      && TREE_CODE (GOTO_DESTINATION (else_)) == LABEL_DECL)
    {
      false_label = GOTO_DESTINATION (else_);
      else_ = NULL;
      else_se = false;
    }

  /* If we aren't hijacking a label for the 'then' branch, it falls through.  */
  if (true_label)
    true_label_p = &true_label;
  else
    true_label_p = NULL;

  /* The 'else' branch also needs a label if it contains interesting code.  */
  if (false_label || else_se)
    false_label_p = &false_label;
  else
    false_label_p = NULL;

  /* If there was nothing else in our arms, just forward the label(s).  */
  if (!then_se && !else_se)
    return shortcut_cond_r (pred, true_label_p, false_label_p,
			    EXPR_LOC_OR_LOC (expr, input_location));

  /* If our last subexpression already has a terminal label, reuse it.  */
  if (else_se)
    t = expr_last (else_);
  else if (then_se)
    t = expr_last (then_);
  else
    t = NULL;
  if (t && TREE_CODE (t) == LABEL_EXPR)
    end_label = LABEL_EXPR_LABEL (t);

  /* If we don't care about jumping to the 'else' branch, jump to the end
     if the condition is false.  */
  if (!false_label_p)
    false_label_p = &end_label;

  /* We only want to emit these labels if we aren't hijacking them.  */
  emit_end = (end_label == NULL_TREE);
  emit_false = (false_label == NULL_TREE);

  /* We only emit the jump over the else clause if we have to--if the
     then clause may fall through.  Otherwise we can wind up with a
     useless jump and a useless label at the end of gimplified code,
     which will cause us to think that this conditional as a whole
     falls through even if it doesn't.  If we then inline a function
     which ends with such a condition, that can cause us to issue an
     inappropriate warning about control reaching the end of a
     non-void function.  */
  jump_over_else = block_may_fallthru (then_);

  pred = shortcut_cond_r (pred, true_label_p, false_label_p,
			  EXPR_LOC_OR_LOC (expr, input_location));

  expr = NULL;
  append_to_statement_list (pred, &expr);

  append_to_statement_list (then_, &expr);
  if (else_se)
    {
      if (jump_over_else)
	{
	  tree last = expr_last (expr);
	  t = build_and_jump (&end_label);
	  if (EXPR_HAS_LOCATION (last))
	    SET_EXPR_LOCATION (t, EXPR_LOCATION (last));
	  append_to_statement_list (t, &expr);
	}
      if (emit_false)
	{
	  t = build1 (LABEL_EXPR, void_type_node, false_label);
	  append_to_statement_list (t, &expr);
	}
      append_to_statement_list (else_, &expr);
    }
  if (emit_end && end_label)
    {
      t = build1 (LABEL_EXPR, void_type_node, end_label);
      append_to_statement_list (t, &expr);
    }

  return expr;
}

/* EXPR is used in a boolean context; make sure it has BOOLEAN_TYPE.  */

tree
gimple_boolify (tree expr)
{
  tree type = TREE_TYPE (expr);
  location_t loc = EXPR_LOCATION (expr);

  if (TREE_CODE (expr) == NE_EXPR
      && TREE_CODE (TREE_OPERAND (expr, 0)) == CALL_EXPR
      && integer_zerop (TREE_OPERAND (expr, 1)))
    {
      tree call = TREE_OPERAND (expr, 0);
      tree fn = get_callee_fndecl (call);

      /* For __builtin_expect ((long) (x), y) recurse into x as well
	 if x is truth_value_p.  */
      if (fn
	  && DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL
	  && DECL_FUNCTION_CODE (fn) == BUILT_IN_EXPECT
	  && call_expr_nargs (call) == 2)
	{
	  tree arg = CALL_EXPR_ARG (call, 0);
	  if (arg)
	    {
	      if (TREE_CODE (arg) == NOP_EXPR
		  && TREE_TYPE (arg) == TREE_TYPE (call))
		arg = TREE_OPERAND (arg, 0);
	      if (truth_value_p (TREE_CODE (arg)))
		{
		  arg = gimple_boolify (arg);
		  CALL_EXPR_ARG (call, 0)
		    = fold_convert_loc (loc, TREE_TYPE (call), arg);
		}
	    }
	}
    }

  switch (TREE_CODE (expr))
    {
    case TRUTH_AND_EXPR:
    case TRUTH_OR_EXPR:
    case TRUTH_XOR_EXPR:
    case TRUTH_ANDIF_EXPR:
    case TRUTH_ORIF_EXPR:
      /* Also boolify the arguments of truth exprs.  */
      TREE_OPERAND (expr, 1) = gimple_boolify (TREE_OPERAND (expr, 1));
      /* FALLTHRU */

    case TRUTH_NOT_EXPR:
      TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));

      /* These expressions always produce boolean results.  */
      if (TREE_CODE (type) != BOOLEAN_TYPE)
	TREE_TYPE (expr) = boolean_type_node;
      return expr;

    case ANNOTATE_EXPR:
      if ((enum annot_expr_kind) TREE_INT_CST_LOW (TREE_OPERAND (expr, 1))
	  == annot_expr_ivdep_kind)
	{
	  TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
	  if (TREE_CODE (type) != BOOLEAN_TYPE)
	    TREE_TYPE (expr) = boolean_type_node;
	  return expr;
	}
      /* FALLTHRU */

    default:
      if (COMPARISON_CLASS_P (expr))
	{
	  /* There expressions always prduce boolean results.  */
	  if (TREE_CODE (type) != BOOLEAN_TYPE)
	    TREE_TYPE (expr) = boolean_type_node;
	  return expr;
	}
      /* Other expressions that get here must have boolean values, but
	 might need to be converted to the appropriate mode.  */
      if (TREE_CODE (type) == BOOLEAN_TYPE)
	return expr;
      return fold_convert_loc (loc, boolean_type_node, expr);
    }
}

/* Given a conditional expression *EXPR_P without side effects, gimplify
   its operands.  New statements are inserted to PRE_P.  */

static enum gimplify_status
gimplify_pure_cond_expr (tree *expr_p, gimple_seq *pre_p)
{
  tree expr = *expr_p, cond;
  enum gimplify_status ret, tret;
  enum tree_code code;

  cond = gimple_boolify (COND_EXPR_COND (expr));

  /* We need to handle && and || specially, as their gimplification
     creates pure cond_expr, thus leading to an infinite cycle otherwise.  */
  code = TREE_CODE (cond);
  if (code == TRUTH_ANDIF_EXPR)
    TREE_SET_CODE (cond, TRUTH_AND_EXPR);
  else if (code == TRUTH_ORIF_EXPR)
    TREE_SET_CODE (cond, TRUTH_OR_EXPR);
  ret = gimplify_expr (&cond, pre_p, NULL, is_gimple_condexpr, fb_rvalue);
  COND_EXPR_COND (*expr_p) = cond;

  tret = gimplify_expr (&COND_EXPR_THEN (expr), pre_p, NULL,
				   is_gimple_val, fb_rvalue);
  ret = MIN (ret, tret);
  tret = gimplify_expr (&COND_EXPR_ELSE (expr), pre_p, NULL,
				   is_gimple_val, fb_rvalue);

  return MIN (ret, tret);
}

/* Return true if evaluating EXPR could trap.
   EXPR is GENERIC, while tree_could_trap_p can be called
   only on GIMPLE.  */

static bool
generic_expr_could_trap_p (tree expr)
{
  unsigned i, n;

  if (!expr || is_gimple_val (expr))
    return false;

  if (!EXPR_P (expr) || tree_could_trap_p (expr))
    return true;

  n = TREE_OPERAND_LENGTH (expr);
  for (i = 0; i < n; i++)
    if (generic_expr_could_trap_p (TREE_OPERAND (expr, i)))
      return true;

  return false;
}

/*  Convert the conditional expression pointed to by EXPR_P '(p) ? a : b;'
    into

    if (p)			if (p)
      t1 = a;			  a;
    else		or	else
      t1 = b;			  b;
    t1;

    The second form is used when *EXPR_P is of type void.

    PRE_P points to the list where side effects that must happen before
      *EXPR_P should be stored.  */

static enum gimplify_status
gimplify_cond_expr (tree *expr_p, gimple_seq *pre_p, fallback_t fallback)
{
  tree expr = *expr_p;
  tree type = TREE_TYPE (expr);
  location_t loc = EXPR_LOCATION (expr);
  tree tmp, arm1, arm2;
  enum gimplify_status ret;
  tree label_true, label_false, label_cont;
  bool have_then_clause_p, have_else_clause_p;
  gimple gimple_cond;
  enum tree_code pred_code;
  gimple_seq seq = NULL;

  /* If this COND_EXPR has a value, copy the values into a temporary within
     the arms.  */
  if (!VOID_TYPE_P (type))
    {
      tree then_ = TREE_OPERAND (expr, 1), else_ = TREE_OPERAND (expr, 2);
      tree result;

      /* If either an rvalue is ok or we do not require an lvalue, create the
	 temporary.  But we cannot do that if the type is addressable.  */
      if (((fallback & fb_rvalue) || !(fallback & fb_lvalue))
	  && !TREE_ADDRESSABLE (type))
	{
	  if (gimplify_ctxp->allow_rhs_cond_expr
	      /* If either branch has side effects or could trap, it can't be
		 evaluated unconditionally.  */
	      && !TREE_SIDE_EFFECTS (then_)
	      && !generic_expr_could_trap_p (then_)
	      && !TREE_SIDE_EFFECTS (else_)
	      && !generic_expr_could_trap_p (else_))
	    return gimplify_pure_cond_expr (expr_p, pre_p);

	  tmp = create_tmp_var (type, "iftmp");
	  result = tmp;
	}

      /* Otherwise, only create and copy references to the values.  */
      else
	{
	  type = build_pointer_type (type);

	  if (!VOID_TYPE_P (TREE_TYPE (then_)))
	    then_ = build_fold_addr_expr_loc (loc, then_);

	  if (!VOID_TYPE_P (TREE_TYPE (else_)))
	    else_ = build_fold_addr_expr_loc (loc, else_);
 
	  expr
	    = build3 (COND_EXPR, type, TREE_OPERAND (expr, 0), then_, else_);

	  tmp = create_tmp_var (type, "iftmp");
	  result = build_simple_mem_ref_loc (loc, tmp);
	}

      /* Build the new then clause, `tmp = then_;'.  But don't build the
	 assignment if the value is void; in C++ it can be if it's a throw.  */
      if (!VOID_TYPE_P (TREE_TYPE (then_)))
	TREE_OPERAND (expr, 1) = build2 (MODIFY_EXPR, type, tmp, then_);

      /* Similarly, build the new else clause, `tmp = else_;'.  */
      if (!VOID_TYPE_P (TREE_TYPE (else_)))
	TREE_OPERAND (expr, 2) = build2 (MODIFY_EXPR, type, tmp, else_);

      TREE_TYPE (expr) = void_type_node;
      recalculate_side_effects (expr);

      /* Move the COND_EXPR to the prequeue.  */
      gimplify_stmt (&expr, pre_p);

      *expr_p = result;
      return GS_ALL_DONE;
    }

  /* Remove any COMPOUND_EXPR so the following cases will be caught.  */
  STRIP_TYPE_NOPS (TREE_OPERAND (expr, 0));
  if (TREE_CODE (TREE_OPERAND (expr, 0)) == COMPOUND_EXPR)
    gimplify_compound_expr (&TREE_OPERAND (expr, 0), pre_p, true);

  /* Make sure the condition has BOOLEAN_TYPE.  */
  TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));

  /* Break apart && and || conditions.  */
  if (TREE_CODE (TREE_OPERAND (expr, 0)) == TRUTH_ANDIF_EXPR
      || TREE_CODE (TREE_OPERAND (expr, 0)) == TRUTH_ORIF_EXPR)
    {
      expr = shortcut_cond_expr (expr);

      if (expr != *expr_p)
	{
	  *expr_p = expr;

	  /* We can't rely on gimplify_expr to re-gimplify the expanded
	     form properly, as cleanups might cause the target labels to be
	     wrapped in a TRY_FINALLY_EXPR.  To prevent that, we need to
	     set up a conditional context.  */
	  gimple_push_condition ();
	  gimplify_stmt (expr_p, &seq);
	  gimple_pop_condition (pre_p);
	  gimple_seq_add_seq (pre_p, seq);

	  return GS_ALL_DONE;
	}
    }

  /* Now do the normal gimplification.  */

  /* Gimplify condition.  */
  ret = gimplify_expr (&TREE_OPERAND (expr, 0), pre_p, NULL, is_gimple_condexpr,
		       fb_rvalue);
  if (ret == GS_ERROR)
    return GS_ERROR;
  gcc_assert (TREE_OPERAND (expr, 0) != NULL_TREE);

  gimple_push_condition ();

  have_then_clause_p = have_else_clause_p = false;
  if (TREE_OPERAND (expr, 1) != NULL
      && TREE_CODE (TREE_OPERAND (expr, 1)) == GOTO_EXPR
      && TREE_CODE (GOTO_DESTINATION (TREE_OPERAND (expr, 1))) == LABEL_DECL
      && (DECL_CONTEXT (GOTO_DESTINATION (TREE_OPERAND (expr, 1)))
	  == current_function_decl)
      /* For -O0 avoid this optimization if the COND_EXPR and GOTO_EXPR
	 have different locations, otherwise we end up with incorrect
	 location information on the branches.  */
      && (optimize
	  || !EXPR_HAS_LOCATION (expr)
	  || !EXPR_HAS_LOCATION (TREE_OPERAND (expr, 1))
	  || EXPR_LOCATION (expr) == EXPR_LOCATION (TREE_OPERAND (expr, 1))))
    {
      label_true = GOTO_DESTINATION (TREE_OPERAND (expr, 1));
      have_then_clause_p = true;
    }
  else
    label_true = create_artificial_label (UNKNOWN_LOCATION);
  if (TREE_OPERAND (expr, 2) != NULL
      && TREE_CODE (TREE_OPERAND (expr, 2)) == GOTO_EXPR
      && TREE_CODE (GOTO_DESTINATION (TREE_OPERAND (expr, 2))) == LABEL_DECL
      && (DECL_CONTEXT (GOTO_DESTINATION (TREE_OPERAND (expr, 2)))
	  == current_function_decl)
      /* For -O0 avoid this optimization if the COND_EXPR and GOTO_EXPR
	 have different locations, otherwise we end up with incorrect
	 location information on the branches.  */
      && (optimize
	  || !EXPR_HAS_LOCATION (expr)
	  || !EXPR_HAS_LOCATION (TREE_OPERAND (expr, 2))
	  || EXPR_LOCATION (expr) == EXPR_LOCATION (TREE_OPERAND (expr, 2))))
    {
      label_false = GOTO_DESTINATION (TREE_OPERAND (expr, 2));
      have_else_clause_p = true;
    }
  else
    label_false = create_artificial_label (UNKNOWN_LOCATION);

  gimple_cond_get_ops_from_tree (COND_EXPR_COND (expr), &pred_code, &arm1,
				 &arm2);

  gimple_cond = gimple_build_cond (pred_code, arm1, arm2, label_true,
                                   label_false);

  gimplify_seq_add_stmt (&seq, gimple_cond);
  label_cont = NULL_TREE;
  if (!have_then_clause_p)
    {
      /* For if (...) {} else { code; } put label_true after
	 the else block.  */
      if (TREE_OPERAND (expr, 1) == NULL_TREE
	  && !have_else_clause_p
	  && TREE_OPERAND (expr, 2) != NULL_TREE)
	label_cont = label_true;
      else
	{
	  gimplify_seq_add_stmt (&seq, gimple_build_label (label_true));
	  have_then_clause_p = gimplify_stmt (&TREE_OPERAND (expr, 1), &seq);
	  /* For if (...) { code; } else {} or
	     if (...) { code; } else goto label; or
	     if (...) { code; return; } else { ... }
	     label_cont isn't needed.  */
	  if (!have_else_clause_p
	      && TREE_OPERAND (expr, 2) != NULL_TREE
	      && gimple_seq_may_fallthru (seq))
	    {
	      gimple g;
	      label_cont = create_artificial_label (UNKNOWN_LOCATION);

	      g = gimple_build_goto (label_cont);

	      /* GIMPLE_COND's are very low level; they have embedded
		 gotos.  This particular embedded goto should not be marked
		 with the location of the original COND_EXPR, as it would
		 correspond to the COND_EXPR's condition, not the ELSE or the
		 THEN arms.  To avoid marking it with the wrong location, flag
		 it as "no location".  */
	      gimple_set_do_not_emit_location (g);

	      gimplify_seq_add_stmt (&seq, g);
	    }
	}
    }
  if (!have_else_clause_p)
    {
      gimplify_seq_add_stmt (&seq, gimple_build_label (label_false));
      have_else_clause_p = gimplify_stmt (&TREE_OPERAND (expr, 2), &seq);
    }
  if (label_cont)
    gimplify_seq_add_stmt (&seq, gimple_build_label (label_cont));

  gimple_pop_condition (pre_p);
  gimple_seq_add_seq (pre_p, seq);

  if (ret == GS_ERROR)
    ; /* Do nothing.  */
  else if (have_then_clause_p || have_else_clause_p)
    ret = GS_ALL_DONE;
  else
    {
      /* Both arms are empty; replace the COND_EXPR with its predicate.  */
      expr = TREE_OPERAND (expr, 0);
      gimplify_stmt (&expr, pre_p);
    }

  *expr_p = NULL;
  return ret;
}

/* Prepare the node pointed to by EXPR_P, an is_gimple_addressable expression,
   to be marked addressable.

   We cannot rely on such an expression being directly markable if a temporary
   has been created by the gimplification.  In this case, we create another
   temporary and initialize it with a copy, which will become a store after we
   mark it addressable.  This can happen if the front-end passed us something
   that it could not mark addressable yet, like a Fortran pass-by-reference
   parameter (int) floatvar.  */

static void
prepare_gimple_addressable (tree *expr_p, gimple_seq *seq_p)
{
  while (handled_component_p (*expr_p))
    expr_p = &TREE_OPERAND (*expr_p, 0);
  if (is_gimple_reg (*expr_p))
    *expr_p = get_initialized_tmp_var (*expr_p, seq_p, NULL);
}

/* A subroutine of gimplify_modify_expr.  Replace a MODIFY_EXPR with
   a call to __builtin_memcpy.  */

static enum gimplify_status
gimplify_modify_expr_to_memcpy (tree *expr_p, tree size, bool want_value,
    				gimple_seq *seq_p)
{
  tree t, to, to_ptr, from, from_ptr;
  gimple gs;
  location_t loc = EXPR_LOCATION (*expr_p);

  to = TREE_OPERAND (*expr_p, 0);
  from = TREE_OPERAND (*expr_p, 1);

  /* Mark the RHS addressable.  Beware that it may not be possible to do so
     directly if a temporary has been created by the gimplification.  */
  prepare_gimple_addressable (&from, seq_p);

  mark_addressable (from);
  from_ptr = build_fold_addr_expr_loc (loc, from);
  gimplify_arg (&from_ptr, seq_p, loc);

  mark_addressable (to);
  to_ptr = build_fold_addr_expr_loc (loc, to);
  gimplify_arg (&to_ptr, seq_p, loc);

  t = builtin_decl_implicit (BUILT_IN_MEMCPY);

  gs = gimple_build_call (t, 3, to_ptr, from_ptr, size);

  if (want_value)
    {
      /* tmp = memcpy() */
      t = create_tmp_var (TREE_TYPE (to_ptr), NULL);
      gimple_call_set_lhs (gs, t);
      gimplify_seq_add_stmt (seq_p, gs);

      *expr_p = build_simple_mem_ref (t);
      return GS_ALL_DONE;
    }

  gimplify_seq_add_stmt (seq_p, gs);
  *expr_p = NULL;
  return GS_ALL_DONE;
}

/* A subroutine of gimplify_modify_expr.  Replace a MODIFY_EXPR with
   a call to __builtin_memset.  In this case we know that the RHS is
   a CONSTRUCTOR with an empty element list.  */

static enum gimplify_status
gimplify_modify_expr_to_memset (tree *expr_p, tree size, bool want_value,
    				gimple_seq *seq_p)
{
  tree t, from, to, to_ptr;
  gimple gs;
  location_t loc = EXPR_LOCATION (*expr_p);

  /* Assert our assumptions, to abort instead of producing wrong code
     silently if they are not met.  Beware that the RHS CONSTRUCTOR might
     not be immediately exposed.  */
  from = TREE_OPERAND (*expr_p, 1);
  if (TREE_CODE (from) == WITH_SIZE_EXPR)
    from = TREE_OPERAND (from, 0);

  gcc_assert (TREE_CODE (from) == CONSTRUCTOR
	      && vec_safe_is_empty (CONSTRUCTOR_ELTS (from)));

  /* Now proceed.  */
  to = TREE_OPERAND (*expr_p, 0);

  to_ptr = build_fold_addr_expr_loc (loc, to);
  gimplify_arg (&to_ptr, seq_p, loc);
  t = builtin_decl_implicit (BUILT_IN_MEMSET);

  gs = gimple_build_call (t, 3, to_ptr, integer_zero_node, size);

  if (want_value)
    {
      /* tmp = memset() */
      t = create_tmp_var (TREE_TYPE (to_ptr), NULL);
      gimple_call_set_lhs (gs, t);
      gimplify_seq_add_stmt (seq_p, gs);

      *expr_p = build1 (INDIRECT_REF, TREE_TYPE (to), t);
      return GS_ALL_DONE;
    }

  gimplify_seq_add_stmt (seq_p, gs);
  *expr_p = NULL;
  return GS_ALL_DONE;
}

/* A subroutine of gimplify_init_ctor_preeval.  Called via walk_tree,
   determine, cautiously, if a CONSTRUCTOR overlaps the lhs of an
   assignment.  Return non-null if we detect a potential overlap.  */

struct gimplify_init_ctor_preeval_data
{
  /* The base decl of the lhs object.  May be NULL, in which case we
     have to assume the lhs is indirect.  */
  tree lhs_base_decl;

  /* The alias set of the lhs object.  */
  alias_set_type lhs_alias_set;
};

static tree
gimplify_init_ctor_preeval_1 (tree *tp, int *walk_subtrees, void *xdata)
{
  struct gimplify_init_ctor_preeval_data *data
    = (struct gimplify_init_ctor_preeval_data *) xdata;
  tree t = *tp;

  /* If we find the base object, obviously we have overlap.  */
  if (data->lhs_base_decl == t)
    return t;

  /* If the constructor component is indirect, determine if we have a
     potential overlap with the lhs.  The only bits of information we
     have to go on at this point are addressability and alias sets.  */
  if ((INDIRECT_REF_P (t)
       || TREE_CODE (t) == MEM_REF)
      && (!data->lhs_base_decl || TREE_ADDRESSABLE (data->lhs_base_decl))
      && alias_sets_conflict_p (data->lhs_alias_set, get_alias_set (t)))
    return t;

  /* If the constructor component is a call, determine if it can hide a
     potential overlap with the lhs through an INDIRECT_REF like above.
     ??? Ugh - this is completely broken.  In fact this whole analysis
     doesn't look conservative.  */
  if (TREE_CODE (t) == CALL_EXPR)
    {
      tree type, fntype = TREE_TYPE (TREE_TYPE (CALL_EXPR_FN (t)));

      for (type = TYPE_ARG_TYPES (fntype); type; type = TREE_CHAIN (type))
	if (POINTER_TYPE_P (TREE_VALUE (type))
	    && (!data->lhs_base_decl || TREE_ADDRESSABLE (data->lhs_base_decl))
	    && alias_sets_conflict_p (data->lhs_alias_set,
				      get_alias_set
				        (TREE_TYPE (TREE_VALUE (type)))))
	  return t;
    }

  if (IS_TYPE_OR_DECL_P (t))
    *walk_subtrees = 0;
  return NULL;
}

/* A subroutine of gimplify_init_constructor.  Pre-evaluate EXPR,
   force values that overlap with the lhs (as described by *DATA)
   into temporaries.  */

static void
gimplify_init_ctor_preeval (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
			    struct gimplify_init_ctor_preeval_data *data)
{
  enum gimplify_status one;

  /* If the value is constant, then there's nothing to pre-evaluate.  */
  if (TREE_CONSTANT (*expr_p))
    {
      /* Ensure it does not have side effects, it might contain a reference to
	 the object we're initializing.  */
      gcc_assert (!TREE_SIDE_EFFECTS (*expr_p));
      return;
    }

  /* If the type has non-trivial constructors, we can't pre-evaluate.  */
  if (TREE_ADDRESSABLE (TREE_TYPE (*expr_p)))
    return;

  /* Recurse for nested constructors.  */
  if (TREE_CODE (*expr_p) == CONSTRUCTOR)
    {
      unsigned HOST_WIDE_INT ix;
      constructor_elt *ce;
      vec<constructor_elt, va_gc> *v = CONSTRUCTOR_ELTS (*expr_p);

      FOR_EACH_VEC_SAFE_ELT (v, ix, ce)
	gimplify_init_ctor_preeval (&ce->value, pre_p, post_p, data);

      return;
    }

  /* If this is a variable sized type, we must remember the size.  */
  maybe_with_size_expr (expr_p);

  /* Gimplify the constructor element to something appropriate for the rhs
     of a MODIFY_EXPR.  Given that we know the LHS is an aggregate, we know
     the gimplifier will consider this a store to memory.  Doing this
     gimplification now means that we won't have to deal with complicated
     language-specific trees, nor trees like SAVE_EXPR that can induce
     exponential search behavior.  */
  one = gimplify_expr (expr_p, pre_p, post_p, is_gimple_mem_rhs, fb_rvalue);
  if (one == GS_ERROR)
    {
      *expr_p = NULL;
      return;
    }

  /* If we gimplified to a bare decl, we can be sure that it doesn't overlap
     with the lhs, since "a = { .x=a }" doesn't make sense.  This will
     always be true for all scalars, since is_gimple_mem_rhs insists on a
     temporary variable for them.  */
  if (DECL_P (*expr_p))
    return;

  /* If this is of variable size, we have no choice but to assume it doesn't
     overlap since we can't make a temporary for it.  */
  if (TREE_CODE (TYPE_SIZE (TREE_TYPE (*expr_p))) != INTEGER_CST)
    return;

  /* Otherwise, we must search for overlap ...  */
  if (!walk_tree (expr_p, gimplify_init_ctor_preeval_1, data, NULL))
    return;

  /* ... and if found, force the value into a temporary.  */
  *expr_p = get_formal_tmp_var (*expr_p, pre_p);
}

/* A subroutine of gimplify_init_ctor_eval.  Create a loop for
   a RANGE_EXPR in a CONSTRUCTOR for an array.

      var = lower;
    loop_entry:
      object[var] = value;
      if (var == upper)
	goto loop_exit;
      var = var + 1;
      goto loop_entry;
    loop_exit:

   We increment var _after_ the loop exit check because we might otherwise
   fail if upper == TYPE_MAX_VALUE (type for upper).

   Note that we never have to deal with SAVE_EXPRs here, because this has
   already been taken care of for us, in gimplify_init_ctor_preeval().  */

static void gimplify_init_ctor_eval (tree, vec<constructor_elt, va_gc> *,
				     gimple_seq *, bool);

static void
gimplify_init_ctor_eval_range (tree object, tree lower, tree upper,
			       tree value, tree array_elt_type,
			       gimple_seq *pre_p, bool cleared)
{
  tree loop_entry_label, loop_exit_label, fall_thru_label;
  tree var, var_type, cref, tmp;

  loop_entry_label = create_artificial_label (UNKNOWN_LOCATION);
  loop_exit_label = create_artificial_label (UNKNOWN_LOCATION);
  fall_thru_label = create_artificial_label (UNKNOWN_LOCATION);

  /* Create and initialize the index variable.  */
  var_type = TREE_TYPE (upper);
  var = create_tmp_var (var_type, NULL);
  gimplify_seq_add_stmt (pre_p, gimple_build_assign (var, lower));

  /* Add the loop entry label.  */
  gimplify_seq_add_stmt (pre_p, gimple_build_label (loop_entry_label));

  /* Build the reference.  */
  cref = build4 (ARRAY_REF, array_elt_type, unshare_expr (object),
		 var, NULL_TREE, NULL_TREE);

  /* If we are a constructor, just call gimplify_init_ctor_eval to do
     the store.  Otherwise just assign value to the reference.  */

  if (TREE_CODE (value) == CONSTRUCTOR)
    /* NB we might have to call ourself recursively through
       gimplify_init_ctor_eval if the value is a constructor.  */
    gimplify_init_ctor_eval (cref, CONSTRUCTOR_ELTS (value),
			     pre_p, cleared);
  else
    gimplify_seq_add_stmt (pre_p, gimple_build_assign (cref, value));

  /* We exit the loop when the index var is equal to the upper bound.  */
  gimplify_seq_add_stmt (pre_p,
			 gimple_build_cond (EQ_EXPR, var, upper,
					    loop_exit_label, fall_thru_label));

  gimplify_seq_add_stmt (pre_p, gimple_build_label (fall_thru_label));

  /* Otherwise, increment the index var...  */
  tmp = build2 (PLUS_EXPR, var_type, var,
		fold_convert (var_type, integer_one_node));
  gimplify_seq_add_stmt (pre_p, gimple_build_assign (var, tmp));

  /* ...and jump back to the loop entry.  */
  gimplify_seq_add_stmt (pre_p, gimple_build_goto (loop_entry_label));

  /* Add the loop exit label.  */
  gimplify_seq_add_stmt (pre_p, gimple_build_label (loop_exit_label));
}

/* Return true if FDECL is accessing a field that is zero sized.  */

static bool
zero_sized_field_decl (const_tree fdecl)
{
  if (TREE_CODE (fdecl) == FIELD_DECL && DECL_SIZE (fdecl)
      && integer_zerop (DECL_SIZE (fdecl)))
    return true;
  return false;
}

/* Return true if TYPE is zero sized.  */

static bool
zero_sized_type (const_tree type)
{
  if (AGGREGATE_TYPE_P (type) && TYPE_SIZE (type)
      && integer_zerop (TYPE_SIZE (type)))
    return true;
  return false;
}

/* A subroutine of gimplify_init_constructor.  Generate individual
   MODIFY_EXPRs for a CONSTRUCTOR.  OBJECT is the LHS against which the
   assignments should happen.  ELTS is the CONSTRUCTOR_ELTS of the
   CONSTRUCTOR.  CLEARED is true if the entire LHS object has been
   zeroed first.  */

static void
gimplify_init_ctor_eval (tree object, vec<constructor_elt, va_gc> *elts,
			 gimple_seq *pre_p, bool cleared)
{
  tree array_elt_type = NULL;
  unsigned HOST_WIDE_INT ix;
  tree purpose, value;

  if (TREE_CODE (TREE_TYPE (object)) == ARRAY_TYPE)
    array_elt_type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (object)));

  FOR_EACH_CONSTRUCTOR_ELT (elts, ix, purpose, value)
    {
      tree cref;

      /* NULL values are created above for gimplification errors.  */
      if (value == NULL)
	continue;

      if (cleared && initializer_zerop (value))
	continue;

      /* ??? Here's to hoping the front end fills in all of the indices,
	 so we don't have to figure out what's missing ourselves.  */
      gcc_assert (purpose);

      /* Skip zero-sized fields, unless value has side-effects.  This can
	 happen with calls to functions returning a zero-sized type, which
	 we shouldn't discard.  As a number of downstream passes don't
	 expect sets of zero-sized fields, we rely on the gimplification of
	 the MODIFY_EXPR we make below to drop the assignment statement.  */
      if (! TREE_SIDE_EFFECTS (value) && zero_sized_field_decl (purpose))
	continue;

      /* If we have a RANGE_EXPR, we have to build a loop to assign the
	 whole range.  */
      if (TREE_CODE (purpose) == RANGE_EXPR)
	{
	  tree lower = TREE_OPERAND (purpose, 0);
	  tree upper = TREE_OPERAND (purpose, 1);

	  /* If the lower bound is equal to upper, just treat it as if
	     upper was the index.  */
	  if (simple_cst_equal (lower, upper))
	    purpose = upper;
	  else
	    {
	      gimplify_init_ctor_eval_range (object, lower, upper, value,
					     array_elt_type, pre_p, cleared);
	      continue;
	    }
	}

      if (array_elt_type)
	{
	  /* Do not use bitsizetype for ARRAY_REF indices.  */
	  if (TYPE_DOMAIN (TREE_TYPE (object)))
	    purpose
	      = fold_convert (TREE_TYPE (TYPE_DOMAIN (TREE_TYPE (object))),
			      purpose);
	  cref = build4 (ARRAY_REF, array_elt_type, unshare_expr (object),
			 purpose, NULL_TREE, NULL_TREE);
	}
      else
	{
	  gcc_assert (TREE_CODE (purpose) == FIELD_DECL);
	  cref = build3 (COMPONENT_REF, TREE_TYPE (purpose),
			 unshare_expr (object), purpose, NULL_TREE);
	}

      if (TREE_CODE (value) == CONSTRUCTOR
	  && TREE_CODE (TREE_TYPE (value)) != VECTOR_TYPE)
	gimplify_init_ctor_eval (cref, CONSTRUCTOR_ELTS (value),
				 pre_p, cleared);
      else
	{
	  tree init = build2 (INIT_EXPR, TREE_TYPE (cref), cref, value);
	  gimplify_and_add (init, pre_p);
	  ggc_free (init);
	}
    }
}

/* Return the appropriate RHS predicate for this LHS.  */

gimple_predicate
rhs_predicate_for (tree lhs)
{
  if (is_gimple_reg (lhs))
    return is_gimple_reg_rhs_or_call;
  else
    return is_gimple_mem_rhs_or_call;
}

/* Gimplify a C99 compound literal expression.  This just means adding
   the DECL_EXPR before the current statement and using its anonymous
   decl instead.  */

static enum gimplify_status
gimplify_compound_literal_expr (tree *expr_p, gimple_seq *pre_p,
				bool (*gimple_test_f) (tree),
				fallback_t fallback)
{
  tree decl_s = COMPOUND_LITERAL_EXPR_DECL_EXPR (*expr_p);
  tree decl = DECL_EXPR_DECL (decl_s);
  tree init = DECL_INITIAL (decl);
  /* Mark the decl as addressable if the compound literal
     expression is addressable now, otherwise it is marked too late
     after we gimplify the initialization expression.  */
  if (TREE_ADDRESSABLE (*expr_p))
    TREE_ADDRESSABLE (decl) = 1;
  /* Otherwise, if we don't need an lvalue and have a literal directly
     substitute it.  Check if it matches the gimple predicate, as
     otherwise we'd generate a new temporary, and we can as well just
     use the decl we already have.  */
  else if (!TREE_ADDRESSABLE (decl)
	   && init
	   && (fallback & fb_lvalue) == 0
	   && gimple_test_f (init))
    {
      *expr_p = init;
      return GS_OK;
    }

  /* Preliminarily mark non-addressed complex variables as eligible
     for promotion to gimple registers.  We'll transform their uses
     as we find them.  */
  if ((TREE_CODE (TREE_TYPE (decl)) == COMPLEX_TYPE
       || TREE_CODE (TREE_TYPE (decl)) == VECTOR_TYPE)
      && !TREE_THIS_VOLATILE (decl)
      && !needs_to_live_in_memory (decl))
    DECL_GIMPLE_REG_P (decl) = 1;

  /* If the decl is not addressable, then it is being used in some
     expression or on the right hand side of a statement, and it can
     be put into a readonly data section.  */
  if (!TREE_ADDRESSABLE (decl) && (fallback & fb_lvalue) == 0)
    TREE_READONLY (decl) = 1;

  /* This decl isn't mentioned in the enclosing block, so add it to the
     list of temps.  FIXME it seems a bit of a kludge to say that
     anonymous artificial vars aren't pushed, but everything else is.  */
  if (DECL_NAME (decl) == NULL_TREE && !DECL_SEEN_IN_BIND_EXPR_P (decl))
    gimple_add_tmp_var (decl);

  gimplify_and_add (decl_s, pre_p);
  *expr_p = decl;
  return GS_OK;
}

/* Optimize embedded COMPOUND_LITERAL_EXPRs within a CONSTRUCTOR,
   return a new CONSTRUCTOR if something changed.  */

static tree
optimize_compound_literals_in_ctor (tree orig_ctor)
{
  tree ctor = orig_ctor;
  vec<constructor_elt, va_gc> *elts = CONSTRUCTOR_ELTS (ctor);
  unsigned int idx, num = vec_safe_length (elts);

  for (idx = 0; idx < num; idx++)
    {
      tree value = (*elts)[idx].value;
      tree newval = value;
      if (TREE_CODE (value) == CONSTRUCTOR)
	newval = optimize_compound_literals_in_ctor (value);
      else if (TREE_CODE (value) == COMPOUND_LITERAL_EXPR)
	{
	  tree decl_s = COMPOUND_LITERAL_EXPR_DECL_EXPR (value);
	  tree decl = DECL_EXPR_DECL (decl_s);
	  tree init = DECL_INITIAL (decl);

	  if (!TREE_ADDRESSABLE (value)
	      && !TREE_ADDRESSABLE (decl)
	      && init
	      && TREE_CODE (init) == CONSTRUCTOR)
	    newval = optimize_compound_literals_in_ctor (init);
	}
      if (newval == value)
	continue;

      if (ctor == orig_ctor)
	{
	  ctor = copy_node (orig_ctor);
	  CONSTRUCTOR_ELTS (ctor) = vec_safe_copy (elts);
	  elts = CONSTRUCTOR_ELTS (ctor);
	}
      (*elts)[idx].value = newval;
    }
  return ctor;
}

/* A subroutine of gimplify_modify_expr.  Break out elements of a
   CONSTRUCTOR used as an initializer into separate MODIFY_EXPRs.

   Note that we still need to clear any elements that don't have explicit
   initializers, so if not all elements are initialized we keep the
   original MODIFY_EXPR, we just remove all of the constructor elements.

   If NOTIFY_TEMP_CREATION is true, do not gimplify, just return
   GS_ERROR if we would have to create a temporary when gimplifying
   this constructor.  Otherwise, return GS_OK.

   If NOTIFY_TEMP_CREATION is false, just do the gimplification.  */

static enum gimplify_status
gimplify_init_constructor (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
			   bool want_value, bool notify_temp_creation)
{
  tree object, ctor, type;
  enum gimplify_status ret;
  vec<constructor_elt, va_gc> *elts;

  gcc_assert (TREE_CODE (TREE_OPERAND (*expr_p, 1)) == CONSTRUCTOR);

  if (!notify_temp_creation)
    {
      ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
			   is_gimple_lvalue, fb_lvalue);
      if (ret == GS_ERROR)
	return ret;
    }

  object = TREE_OPERAND (*expr_p, 0);
  ctor = TREE_OPERAND (*expr_p, 1) =
    optimize_compound_literals_in_ctor (TREE_OPERAND (*expr_p, 1));
  type = TREE_TYPE (ctor);
  elts = CONSTRUCTOR_ELTS (ctor);
  ret = GS_ALL_DONE;

  switch (TREE_CODE (type))
    {
    case RECORD_TYPE:
    case UNION_TYPE:
    case QUAL_UNION_TYPE:
    case ARRAY_TYPE:
      {
	struct gimplify_init_ctor_preeval_data preeval_data;
	HOST_WIDE_INT num_ctor_elements, num_nonzero_elements;
	bool cleared, complete_p, valid_const_initializer;

	/* Aggregate types must lower constructors to initialization of
	   individual elements.  The exception is that a CONSTRUCTOR node
	   with no elements indicates zero-initialization of the whole.  */
	if (vec_safe_is_empty (elts))
	  {
	    if (notify_temp_creation)
	      return GS_OK;
	    break;
	  }

	/* Fetch information about the constructor to direct later processing.
	   We might want to make static versions of it in various cases, and
	   can only do so if it known to be a valid constant initializer.  */
	valid_const_initializer
	  = categorize_ctor_elements (ctor, &num_nonzero_elements,
				      &num_ctor_elements, &complete_p);

	/* If a const aggregate variable is being initialized, then it
	   should never be a lose to promote the variable to be static.  */
	if (valid_const_initializer
	    && num_nonzero_elements > 1
	    && TREE_READONLY (object)
	    && TREE_CODE (object) == VAR_DECL
	    && (flag_merge_constants >= 2 || !TREE_ADDRESSABLE (object)))
	  {
	    if (notify_temp_creation)
	      return GS_ERROR;
	    DECL_INITIAL (object) = ctor;
	    TREE_STATIC (object) = 1;
	    if (!DECL_NAME (object))
	      DECL_NAME (object) = create_tmp_var_name ("C");
	    walk_tree (&DECL_INITIAL (object), force_labels_r, NULL, NULL);

	    /* ??? C++ doesn't automatically append a .<number> to the
	       assembler name, and even when it does, it looks at FE private
	       data structures to figure out what that number should be,
	       which are not set for this variable.  I suppose this is
	       important for local statics for inline functions, which aren't
	       "local" in the object file sense.  So in order to get a unique
	       TU-local symbol, we must invoke the lhd version now.  */
	    lhd_set_decl_assembler_name (object);

	    *expr_p = NULL_TREE;
	    break;
	  }

	/* If there are "lots" of initialized elements, even discounting
	   those that are not address constants (and thus *must* be
	   computed at runtime), then partition the constructor into
	   constant and non-constant parts.  Block copy the constant
	   parts in, then generate code for the non-constant parts.  */
	/* TODO.  There's code in cp/typeck.c to do this.  */

	if (int_size_in_bytes (TREE_TYPE (ctor)) < 0)
	  /* store_constructor will ignore the clearing of variable-sized
	     objects.  Initializers for such objects must explicitly set
	     every field that needs to be set.  */
	  cleared = false;
	else if (!complete_p && !CONSTRUCTOR_NO_CLEARING (ctor))
	  /* If the constructor isn't complete, clear the whole object
	     beforehand, unless CONSTRUCTOR_NO_CLEARING is set on it.

	     ??? This ought not to be needed.  For any element not present
	     in the initializer, we should simply set them to zero.  Except
	     we'd need to *find* the elements that are not present, and that
	     requires trickery to avoid quadratic compile-time behavior in
	     large cases or excessive memory use in small cases.  */
	  cleared = true;
	else if (num_ctor_elements - num_nonzero_elements
		 > CLEAR_RATIO (optimize_function_for_speed_p (cfun))
		 && num_nonzero_elements < num_ctor_elements / 4)
	  /* If there are "lots" of zeros, it's more efficient to clear
	     the memory and then set the nonzero elements.  */
	  cleared = true;
	else
	  cleared = false;

	/* If there are "lots" of initialized elements, and all of them
	   are valid address constants, then the entire initializer can
	   be dropped to memory, and then memcpy'd out.  Don't do this
	   for sparse arrays, though, as it's more efficient to follow
	   the standard CONSTRUCTOR behavior of memset followed by
	   individual element initialization.  Also don't do this for small
	   all-zero initializers (which aren't big enough to merit
	   clearing), and don't try to make bitwise copies of
	   TREE_ADDRESSABLE types.  */
	if (valid_const_initializer
	    && !(cleared || num_nonzero_elements == 0)
	    && !TREE_ADDRESSABLE (type))
	  {
	    HOST_WIDE_INT size = int_size_in_bytes (type);
	    unsigned int align;

	    /* ??? We can still get unbounded array types, at least
	       from the C++ front end.  This seems wrong, but attempt
	       to work around it for now.  */
	    if (size < 0)
	      {
		size = int_size_in_bytes (TREE_TYPE (object));
		if (size >= 0)
		  TREE_TYPE (ctor) = type = TREE_TYPE (object);
	      }

	    /* Find the maximum alignment we can assume for the object.  */
	    /* ??? Make use of DECL_OFFSET_ALIGN.  */
	    if (DECL_P (object))
	      align = DECL_ALIGN (object);
	    else
	      align = TYPE_ALIGN (type);

	    /* Do a block move either if the size is so small as to make
	       each individual move a sub-unit move on average, or if it
	       is so large as to make individual moves inefficient.  */
	    if (size > 0
		&& num_nonzero_elements > 1
		&& (size < num_nonzero_elements
		    || !can_move_by_pieces (size, align)))
	      {
		if (notify_temp_creation)
		  return GS_ERROR;

		walk_tree (&ctor, force_labels_r, NULL, NULL);
		ctor = tree_output_constant_def (ctor);
		if (!useless_type_conversion_p (type, TREE_TYPE (ctor)))
		  ctor = build1 (VIEW_CONVERT_EXPR, type, ctor);
		TREE_OPERAND (*expr_p, 1) = ctor;

		/* This is no longer an assignment of a CONSTRUCTOR, but
		   we still may have processing to do on the LHS.  So
		   pretend we didn't do anything here to let that happen.  */
		return GS_UNHANDLED;
	      }
	  }

	/* If the target is volatile, we have non-zero elements and more than
	   one field to assign, initialize the target from a temporary.  */
	if (TREE_THIS_VOLATILE (object)
	    && !TREE_ADDRESSABLE (type)
	    && num_nonzero_elements > 0
	    && vec_safe_length (elts) > 1)
	  {
	    tree temp = create_tmp_var (TYPE_MAIN_VARIANT (type), NULL);
	    TREE_OPERAND (*expr_p, 0) = temp;
	    *expr_p = build2 (COMPOUND_EXPR, TREE_TYPE (*expr_p),
			      *expr_p,
			      build2 (MODIFY_EXPR, void_type_node,
				      object, temp));
	    return GS_OK;
	  }

	if (notify_temp_creation)
	  return GS_OK;

	/* If there are nonzero elements and if needed, pre-evaluate to capture
	   elements overlapping with the lhs into temporaries.  We must do this
	   before clearing to fetch the values before they are zeroed-out.  */
	if (num_nonzero_elements > 0 && TREE_CODE (*expr_p) != INIT_EXPR)
	  {
	    preeval_data.lhs_base_decl = get_base_address (object);
	    if (!DECL_P (preeval_data.lhs_base_decl))
	      preeval_data.lhs_base_decl = NULL;
	    preeval_data.lhs_alias_set = get_alias_set (object);

	    gimplify_init_ctor_preeval (&TREE_OPERAND (*expr_p, 1),
					pre_p, post_p, &preeval_data);
	  }

	if (cleared)
	  {
	    /* Zap the CONSTRUCTOR element list, which simplifies this case.
	       Note that we still have to gimplify, in order to handle the
	       case of variable sized types.  Avoid shared tree structures.  */
	    CONSTRUCTOR_ELTS (ctor) = NULL;
	    TREE_SIDE_EFFECTS (ctor) = 0;
	    object = unshare_expr (object);
	    gimplify_stmt (expr_p, pre_p);
	  }

	/* If we have not block cleared the object, or if there are nonzero
	   elements in the constructor, add assignments to the individual
	   scalar fields of the object.  */
	if (!cleared || num_nonzero_elements > 0)
	  gimplify_init_ctor_eval (object, elts, pre_p, cleared);

	*expr_p = NULL_TREE;
      }
      break;

    case COMPLEX_TYPE:
      {
	tree r, i;

	if (notify_temp_creation)
	  return GS_OK;

	/* Extract the real and imaginary parts out of the ctor.  */
	gcc_assert (elts->length () == 2);
	r = (*elts)[0].value;
	i = (*elts)[1].value;
	if (r == NULL || i == NULL)
	  {
	    tree zero = build_zero_cst (TREE_TYPE (type));
	    if (r == NULL)
	      r = zero;
	    if (i == NULL)
	      i = zero;
	  }

	/* Complex types have either COMPLEX_CST or COMPLEX_EXPR to
	   represent creation of a complex value.  */
	if (TREE_CONSTANT (r) && TREE_CONSTANT (i))
	  {
	    ctor = build_complex (type, r, i);
	    TREE_OPERAND (*expr_p, 1) = ctor;
	  }
	else
	  {
	    ctor = build2 (COMPLEX_EXPR, type, r, i);
	    TREE_OPERAND (*expr_p, 1) = ctor;
	    ret = gimplify_expr (&TREE_OPERAND (*expr_p, 1),
				 pre_p,
				 post_p,
				 rhs_predicate_for (TREE_OPERAND (*expr_p, 0)),
				 fb_rvalue);
	  }
      }
      break;

    case VECTOR_TYPE:
      {
	unsigned HOST_WIDE_INT ix;
	constructor_elt *ce;

	if (notify_temp_creation)
	  return GS_OK;

	/* Go ahead and simplify constant constructors to VECTOR_CST.  */
	if (TREE_CONSTANT (ctor))
	  {
	    bool constant_p = true;
	    tree value;

	    /* Even when ctor is constant, it might contain non-*_CST
	       elements, such as addresses or trapping values like
	       1.0/0.0 - 1.0/0.0.  Such expressions don't belong
	       in VECTOR_CST nodes.  */
	    FOR_EACH_CONSTRUCTOR_VALUE (elts, ix, value)
	      if (!CONSTANT_CLASS_P (value))
		{
		  constant_p = false;
		  break;
		}

	    if (constant_p)
	      {
		TREE_OPERAND (*expr_p, 1) = build_vector_from_ctor (type, elts);
		break;
	      }

	    /* Don't reduce an initializer constant even if we can't
	       make a VECTOR_CST.  It won't do anything for us, and it'll
	       prevent us from representing it as a single constant.  */
	    if (initializer_constant_valid_p (ctor, type))
	      break;

	    TREE_CONSTANT (ctor) = 0;
	  }

	/* Vector types use CONSTRUCTOR all the way through gimple
	  compilation as a general initializer.  */
	FOR_EACH_VEC_SAFE_ELT (elts, ix, ce)
	  {
	    enum gimplify_status tret;
	    tret = gimplify_expr (&ce->value, pre_p, post_p, is_gimple_val,
				  fb_rvalue);
	    if (tret == GS_ERROR)
	      ret = GS_ERROR;
	  }
	if (!is_gimple_reg (TREE_OPERAND (*expr_p, 0)))
	  TREE_OPERAND (*expr_p, 1) = get_formal_tmp_var (ctor, pre_p);
      }
      break;

    default:
      /* So how did we get a CONSTRUCTOR for a scalar type?  */
      gcc_unreachable ();
    }

  if (ret == GS_ERROR)
    return GS_ERROR;
  else if (want_value)
    {
      *expr_p = object;
      return GS_OK;
    }
  else
    {
      /* If we have gimplified both sides of the initializer but have
	 not emitted an assignment, do so now.  */
      if (*expr_p)
	{
	  tree lhs = TREE_OPERAND (*expr_p, 0);
	  tree rhs = TREE_OPERAND (*expr_p, 1);
	  gimple init = gimple_build_assign (lhs, rhs);
	  gimplify_seq_add_stmt (pre_p, init);
	  *expr_p = NULL;
	}

      return GS_ALL_DONE;
    }
}

/* Given a pointer value OP0, return a simplified version of an
   indirection through OP0, or NULL_TREE if no simplification is
   possible.  This may only be applied to a rhs of an expression.
   Note that the resulting type may be different from the type pointed
   to in the sense that it is still compatible from the langhooks
   point of view. */

static tree
gimple_fold_indirect_ref_rhs (tree t)
{
  return gimple_fold_indirect_ref (t);
}

/* Subroutine of gimplify_modify_expr to do simplifications of
   MODIFY_EXPRs based on the code of the RHS.  We loop for as long as
   something changes.  */

static enum gimplify_status
gimplify_modify_expr_rhs (tree *expr_p, tree *from_p, tree *to_p,
			  gimple_seq *pre_p, gimple_seq *post_p,
			  bool want_value)
{
  enum gimplify_status ret = GS_UNHANDLED;
  bool changed;

  do
    {
      changed = false;
      switch (TREE_CODE (*from_p))
	{
	case VAR_DECL:
	  /* If we're assigning from a read-only variable initialized with
	     a constructor, do the direct assignment from the constructor,
	     but only if neither source nor target are volatile since this
	     latter assignment might end up being done on a per-field basis.  */
	  if (DECL_INITIAL (*from_p)
	      && TREE_READONLY (*from_p)
	      && !TREE_THIS_VOLATILE (*from_p)
	      && !TREE_THIS_VOLATILE (*to_p)
	      && TREE_CODE (DECL_INITIAL (*from_p)) == CONSTRUCTOR)
	    {
	      tree old_from = *from_p;
	      enum gimplify_status subret;

	      /* Move the constructor into the RHS.  */
	      *from_p = unshare_expr (DECL_INITIAL (*from_p));

	      /* Let's see if gimplify_init_constructor will need to put
		 it in memory.  */
	      subret = gimplify_init_constructor (expr_p, NULL, NULL,
						  false, true);
	      if (subret == GS_ERROR)
		{
		  /* If so, revert the change.  */
		  *from_p = old_from;
		}
	      else
		{
		  ret = GS_OK;
		  changed = true;
		}
	    }
	  break;
	case INDIRECT_REF:
	  {
	    /* If we have code like

	     *(const A*)(A*)&x

	     where the type of "x" is a (possibly cv-qualified variant
	     of "A"), treat the entire expression as identical to "x".
	     This kind of code arises in C++ when an object is bound
	     to a const reference, and if "x" is a TARGET_EXPR we want
	     to take advantage of the optimization below.  */
	    bool volatile_p = TREE_THIS_VOLATILE (*from_p);
	    tree t = gimple_fold_indirect_ref_rhs (TREE_OPERAND (*from_p, 0));
	    if (t)
	      {
		if (TREE_THIS_VOLATILE (t) != volatile_p)
		  {
		    if (TREE_CODE_CLASS (TREE_CODE (t)) == tcc_declaration)
		      t = build_simple_mem_ref_loc (EXPR_LOCATION (*from_p),
						    build_fold_addr_expr (t));
		    if (REFERENCE_CLASS_P (t))
		      TREE_THIS_VOLATILE (t) = volatile_p;
		  }
		*from_p = t;
		ret = GS_OK;
		changed = true;
	      }
	    break;
	  }

	case TARGET_EXPR:
	  {
	    /* If we are initializing something from a TARGET_EXPR, strip the
	       TARGET_EXPR and initialize it directly, if possible.  This can't
	       be done if the initializer is void, since that implies that the
	       temporary is set in some non-trivial way.

	       ??? 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 die because the temp won't
	       have any RTL.  In that case, I guess we'll need to replace
	       references somehow.  */
	    tree init = TARGET_EXPR_INITIAL (*from_p);

	    if (init
		&& !VOID_TYPE_P (TREE_TYPE (init)))
	      {
		*from_p = init;
		ret = GS_OK;
		changed = true;
	      }
	  }
	  break;

	case COMPOUND_EXPR:
	  /* Remove any COMPOUND_EXPR in the RHS so the following cases will be
	     caught.  */
	  gimplify_compound_expr (from_p, pre_p, true);
	  ret = GS_OK;
	  changed = true;
	  break;

	case CONSTRUCTOR:
	  /* If we already made some changes, let the front end have a
	     crack at this before we break it down.  */
	  if (ret != GS_UNHANDLED)
	    break;
	  /* If we're initializing from a CONSTRUCTOR, break this into
	     individual MODIFY_EXPRs.  */
	  return gimplify_init_constructor (expr_p, pre_p, post_p, want_value,
					    false);

	case COND_EXPR:
	  /* If we're assigning to a non-register type, push the assignment
	     down into the branches.  This is mandatory for ADDRESSABLE types,
	     since we cannot generate temporaries for such, but it saves a
	     copy in other cases as well.  */
	  if (!is_gimple_reg_type (TREE_TYPE (*from_p)))
	    {
	      /* This code should mirror the code in gimplify_cond_expr. */
	      enum tree_code code = TREE_CODE (*expr_p);
	      tree cond = *from_p;
	      tree result = *to_p;

	      ret = gimplify_expr (&result, pre_p, post_p,
				   is_gimple_lvalue, fb_lvalue);
	      if (ret != GS_ERROR)
		ret = GS_OK;

	      if (TREE_TYPE (TREE_OPERAND (cond, 1)) != void_type_node)
		TREE_OPERAND (cond, 1)
		  = build2 (code, void_type_node, result,
			    TREE_OPERAND (cond, 1));
	      if (TREE_TYPE (TREE_OPERAND (cond, 2)) != void_type_node)
		TREE_OPERAND (cond, 2)
		  = build2 (code, void_type_node, unshare_expr (result),
			    TREE_OPERAND (cond, 2));

	      TREE_TYPE (cond) = void_type_node;
	      recalculate_side_effects (cond);

	      if (want_value)
		{
		  gimplify_and_add (cond, pre_p);
		  *expr_p = unshare_expr (result);
		}
	      else
		*expr_p = cond;
	      return ret;
	    }
	  break;

	case CALL_EXPR:
	  /* For calls that return in memory, give *to_p as the CALL_EXPR's
	     return slot so that we don't generate a temporary.  */
	  if (!CALL_EXPR_RETURN_SLOT_OPT (*from_p)
	      && aggregate_value_p (*from_p, *from_p))
	    {
	      bool use_target;

	      if (!(rhs_predicate_for (*to_p))(*from_p))
		/* If we need a temporary, *to_p isn't accurate.  */
		use_target = false;
	      /* It's OK to use the return slot directly unless it's an NRV. */
	      else if (TREE_CODE (*to_p) == RESULT_DECL
		       && DECL_NAME (*to_p) == NULL_TREE
		       && needs_to_live_in_memory (*to_p))
		use_target = true;
	      else if (is_gimple_reg_type (TREE_TYPE (*to_p))
		       || (DECL_P (*to_p) && DECL_REGISTER (*to_p)))
		/* Don't force regs into memory.  */
		use_target = false;
	      else if (TREE_CODE (*expr_p) == INIT_EXPR)
		/* It's OK to use the target directly if it's being
		   initialized. */
		use_target = true;
	      else if (variably_modified_type_p (TREE_TYPE (*to_p), NULL_TREE))
		/* Always use the target and thus RSO for variable-sized types.
		   GIMPLE cannot deal with a variable-sized assignment
		   embedded in a call statement.  */
		use_target = true;
	      else if (TREE_CODE (*to_p) != SSA_NAME
		      && (!is_gimple_variable (*to_p)
			  || needs_to_live_in_memory (*to_p)))
		/* Don't use the original target if it's already addressable;
		   if its address escapes, and the called function uses the
		   NRV optimization, a conforming program could see *to_p
		   change before the called function returns; see c++/19317.
		   When optimizing, the return_slot pass marks more functions
		   as safe after we have escape info.  */
		use_target = false;
	      else
		use_target = true;

	      if (use_target)
		{
		  CALL_EXPR_RETURN_SLOT_OPT (*from_p) = 1;
		  mark_addressable (*to_p);
		}
	    }
	  break;

	case WITH_SIZE_EXPR:
	  /* Likewise for calls that return an aggregate of non-constant size,
	     since we would not be able to generate a temporary at all.  */
	  if (TREE_CODE (TREE_OPERAND (*from_p, 0)) == CALL_EXPR)
	    {
	      *from_p = TREE_OPERAND (*from_p, 0);
	      /* We don't change ret in this case because the
		 WITH_SIZE_EXPR might have been added in
		 gimplify_modify_expr, so returning GS_OK would lead to an
		 infinite loop.  */
	      changed = true;
	    }
	  break;

	  /* If we're initializing from a container, push the initialization
	     inside it.  */
	case CLEANUP_POINT_EXPR:
	case BIND_EXPR:
	case STATEMENT_LIST:
	  {
	    tree wrap = *from_p;
	    tree t;

	    ret = gimplify_expr (to_p, pre_p, post_p, is_gimple_min_lval,
				 fb_lvalue);
	    if (ret != GS_ERROR)
	      ret = GS_OK;

	    t = voidify_wrapper_expr (wrap, *expr_p);
	    gcc_assert (t == *expr_p);

	    if (want_value)
	      {
		gimplify_and_add (wrap, pre_p);
		*expr_p = unshare_expr (*to_p);
	      }
	    else
	      *expr_p = wrap;
	    return GS_OK;
	  }

	case COMPOUND_LITERAL_EXPR:
	  {
	    tree complit = TREE_OPERAND (*expr_p, 1);
	    tree decl_s = COMPOUND_LITERAL_EXPR_DECL_EXPR (complit);
	    tree decl = DECL_EXPR_DECL (decl_s);
	    tree init = DECL_INITIAL (decl);

	    /* struct T x = (struct T) { 0, 1, 2 } can be optimized
	       into struct T x = { 0, 1, 2 } if the address of the
	       compound literal has never been taken.  */
	    if (!TREE_ADDRESSABLE (complit)
		&& !TREE_ADDRESSABLE (decl)
		&& init)
	      {
		*expr_p = copy_node (*expr_p);
		TREE_OPERAND (*expr_p, 1) = init;
		return GS_OK;
	      }
	  }

	default:
	  break;
	}
    }
  while (changed);

  return ret;
}


/* Return true if T looks like a valid GIMPLE statement.  */

static bool
is_gimple_stmt (tree t)
{
  const enum tree_code code = TREE_CODE (t);

  switch (code)
    {
    case NOP_EXPR:
      /* The only valid NOP_EXPR is the empty statement.  */
      return IS_EMPTY_STMT (t);

    case BIND_EXPR:
    case COND_EXPR:
      /* These are only valid if they're void.  */
      return TREE_TYPE (t) == NULL || VOID_TYPE_P (TREE_TYPE (t));

    case SWITCH_EXPR:
    case GOTO_EXPR:
    case RETURN_EXPR:
    case LABEL_EXPR:
    case CASE_LABEL_EXPR:
    case TRY_CATCH_EXPR:
    case TRY_FINALLY_EXPR:
    case EH_FILTER_EXPR:
    case CATCH_EXPR:
    case ASM_EXPR:
    case STATEMENT_LIST:
    case OMP_PARALLEL:
    case OMP_FOR:
    case OMP_SIMD:
    case CILK_SIMD:
    case OMP_DISTRIBUTE:
    case OMP_SECTIONS:
    case OMP_SECTION:
    case OMP_SINGLE:
    case OMP_MASTER:
    case OMP_TASKGROUP:
    case OMP_ORDERED:
    case OMP_CRITICAL:
    case OMP_TASK:
      /* These are always void.  */
      return true;

    case CALL_EXPR:
    case MODIFY_EXPR:
    case PREDICT_EXPR:
      /* These are valid regardless of their type.  */
      return true;

    default:
      return false;
    }
}


/* Promote partial stores to COMPLEX variables to total stores.  *EXPR_P is
   a MODIFY_EXPR with a lhs of a REAL/IMAGPART_EXPR of a variable with
   DECL_GIMPLE_REG_P set.

   IMPORTANT NOTE: This promotion is performed by introducing a load of the
   other, unmodified part of the complex object just before the total store.
   As a consequence, if the object is still uninitialized, an undefined value
   will be loaded into a register, which may result in a spurious exception
   if the register is floating-point and the value happens to be a signaling
   NaN for example.  Then the fully-fledged complex operations lowering pass
   followed by a DCE pass are necessary in order to fix things up.  */

static enum gimplify_status
gimplify_modify_expr_complex_part (tree *expr_p, gimple_seq *pre_p,
                                   bool want_value)
{
  enum tree_code code, ocode;
  tree lhs, rhs, new_rhs, other, realpart, imagpart;

  lhs = TREE_OPERAND (*expr_p, 0);
  rhs = TREE_OPERAND (*expr_p, 1);
  code = TREE_CODE (lhs);
  lhs = TREE_OPERAND (lhs, 0);

  ocode = code == REALPART_EXPR ? IMAGPART_EXPR : REALPART_EXPR;
  other = build1 (ocode, TREE_TYPE (rhs), lhs);
  TREE_NO_WARNING (other) = 1;
  other = get_formal_tmp_var (other, pre_p);

  realpart = code == REALPART_EXPR ? rhs : other;
  imagpart = code == REALPART_EXPR ? other : rhs;

  if (TREE_CONSTANT (realpart) && TREE_CONSTANT (imagpart))
    new_rhs = build_complex (TREE_TYPE (lhs), realpart, imagpart);
  else
    new_rhs = build2 (COMPLEX_EXPR, TREE_TYPE (lhs), realpart, imagpart);

  gimplify_seq_add_stmt (pre_p, gimple_build_assign (lhs, new_rhs));
  *expr_p = (want_value) ? rhs : NULL_TREE;

  return GS_ALL_DONE;
}

/* Gimplify the MODIFY_EXPR node pointed to by EXPR_P.

      modify_expr
	      : varname '=' rhs
	      | '*' ID '=' rhs

    PRE_P points to the list where side effects that must happen before
	*EXPR_P should be stored.

    POST_P points to the list where side effects that must happen after
	*EXPR_P should be stored.

    WANT_VALUE is nonzero iff we want to use the value of this expression
	in another expression.  */

static enum gimplify_status
gimplify_modify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
		      bool want_value)
{
  tree *from_p = &TREE_OPERAND (*expr_p, 1);
  tree *to_p = &TREE_OPERAND (*expr_p, 0);
  enum gimplify_status ret = GS_UNHANDLED;
  gimple assign;
  location_t loc = EXPR_LOCATION (*expr_p);
  gimple_stmt_iterator gsi;

  gcc_assert (TREE_CODE (*expr_p) == MODIFY_EXPR
	      || TREE_CODE (*expr_p) == INIT_EXPR);

  /* Trying to simplify a clobber using normal logic doesn't work,
     so handle it here.  */
  if (TREE_CLOBBER_P (*from_p))
    {
      ret = gimplify_expr (to_p, pre_p, post_p, is_gimple_lvalue, fb_lvalue);
      if (ret == GS_ERROR)
	return ret;
      gcc_assert (!want_value
		  && (TREE_CODE (*to_p) == VAR_DECL
		      || TREE_CODE (*to_p) == MEM_REF));
      gimplify_seq_add_stmt (pre_p, gimple_build_assign (*to_p, *from_p));
      *expr_p = NULL;
      return GS_ALL_DONE;
    }

  /* Insert pointer conversions required by the middle-end that are not
     required by the frontend.  This fixes middle-end type checking for
     for example gcc.dg/redecl-6.c.  */
  if (POINTER_TYPE_P (TREE_TYPE (*to_p)))
    {
      STRIP_USELESS_TYPE_CONVERSION (*from_p);
      if (!useless_type_conversion_p (TREE_TYPE (*to_p), TREE_TYPE (*from_p)))
	*from_p = fold_convert_loc (loc, TREE_TYPE (*to_p), *from_p);
    }

  /* See if any simplifications can be done based on what the RHS is.  */
  ret = gimplify_modify_expr_rhs (expr_p, from_p, to_p, pre_p, post_p,
				  want_value);
  if (ret != GS_UNHANDLED)
    return ret;

  /* For zero sized types only gimplify the left hand side and right hand
     side as statements and throw away the assignment.  Do this after
     gimplify_modify_expr_rhs so we handle TARGET_EXPRs of addressable
     types properly.  */
  if (zero_sized_type (TREE_TYPE (*from_p)) && !want_value)
    {
      gimplify_stmt (from_p, pre_p);
      gimplify_stmt (to_p, pre_p);
      *expr_p = NULL_TREE;
      return GS_ALL_DONE;
    }

  /* If the value being copied is of variable width, compute the length
     of the copy into a WITH_SIZE_EXPR.   Note that we need to do this
     before gimplifying any of the operands so that we can resolve any
     PLACEHOLDER_EXPRs in the size.  Also note that the RTL expander uses
     the size of the expression to be copied, not of the destination, so
     that is what we must do here.  */
  maybe_with_size_expr (from_p);

  ret = gimplify_expr (to_p, pre_p, post_p, is_gimple_lvalue, fb_lvalue);
  if (ret == GS_ERROR)
    return ret;

  /* As a special case, we have to temporarily allow for assignments
     with a CALL_EXPR on the RHS.  Since in GIMPLE a function call is
     a toplevel statement, when gimplifying the GENERIC expression
     MODIFY_EXPR <a, CALL_EXPR <foo>>, we cannot create the tuple
     GIMPLE_ASSIGN <a, GIMPLE_CALL <foo>>.

     Instead, we need to create the tuple GIMPLE_CALL <a, foo>.  To
     prevent gimplify_expr from trying to create a new temporary for
     foo's LHS, we tell it that it should only gimplify until it
     reaches the CALL_EXPR.  On return from gimplify_expr, the newly
     created GIMPLE_CALL <foo> will be the last statement in *PRE_P
     and all we need to do here is set 'a' to be its LHS.  */
  ret = gimplify_expr (from_p, pre_p, post_p, rhs_predicate_for (*to_p),
		       fb_rvalue);
  if (ret == GS_ERROR)
    return ret;

  /* Now see if the above changed *from_p to something we handle specially.  */
  ret = gimplify_modify_expr_rhs (expr_p, from_p, to_p, pre_p, post_p,
				  want_value);
  if (ret != GS_UNHANDLED)
    return ret;

  /* If we've got a variable sized assignment between two lvalues (i.e. does
     not involve a call), then we can make things a bit more straightforward
     by converting the assignment to memcpy or memset.  */
  if (TREE_CODE (*from_p) == WITH_SIZE_EXPR)
    {
      tree from = TREE_OPERAND (*from_p, 0);
      tree size = TREE_OPERAND (*from_p, 1);

      if (TREE_CODE (from) == CONSTRUCTOR)
	return gimplify_modify_expr_to_memset (expr_p, size, want_value, pre_p);

      if (is_gimple_addressable (from))
	{
	  *from_p = from;
	  return gimplify_modify_expr_to_memcpy (expr_p, size, want_value,
	      					 pre_p);
	}
    }

  /* Transform partial stores to non-addressable complex variables into
     total stores.  This allows us to use real instead of virtual operands
     for these variables, which improves optimization.  */
  if ((TREE_CODE (*to_p) == REALPART_EXPR
       || TREE_CODE (*to_p) == IMAGPART_EXPR)
      && is_gimple_reg (TREE_OPERAND (*to_p, 0)))
    return gimplify_modify_expr_complex_part (expr_p, pre_p, want_value);

  /* Try to alleviate the effects of the gimplification creating artificial
     temporaries (see for example is_gimple_reg_rhs) on the debug info.  */
  if (!gimplify_ctxp->into_ssa
      && TREE_CODE (*from_p) == VAR_DECL
      && DECL_IGNORED_P (*from_p)
      && DECL_P (*to_p)
      && !DECL_IGNORED_P (*to_p))
    {
      if (!DECL_NAME (*from_p) && DECL_NAME (*to_p))
	DECL_NAME (*from_p)
	  = create_tmp_var_name (IDENTIFIER_POINTER (DECL_NAME (*to_p)));
      DECL_HAS_DEBUG_EXPR_P (*from_p) = 1;
      SET_DECL_DEBUG_EXPR (*from_p, *to_p);
   }

  if (want_value && TREE_THIS_VOLATILE (*to_p))
    *from_p = get_initialized_tmp_var (*from_p, pre_p, post_p);

  if (TREE_CODE (*from_p) == CALL_EXPR)
    {
      /* Since the RHS is a CALL_EXPR, we need to create a GIMPLE_CALL
	 instead of a GIMPLE_ASSIGN.  */
      tree fnptrtype = TREE_TYPE (CALL_EXPR_FN (*from_p));
      CALL_EXPR_FN (*from_p) = TREE_OPERAND (CALL_EXPR_FN (*from_p), 0);
      STRIP_USELESS_TYPE_CONVERSION (CALL_EXPR_FN (*from_p));
      tree fndecl = get_callee_fndecl (*from_p);
      if (fndecl
	  && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL
	  && DECL_FUNCTION_CODE (fndecl) == BUILT_IN_EXPECT
	  && call_expr_nargs (*from_p) == 3)
	assign = gimple_build_call_internal (IFN_BUILTIN_EXPECT, 3,
					     CALL_EXPR_ARG (*from_p, 0),
					     CALL_EXPR_ARG (*from_p, 1),
					     CALL_EXPR_ARG (*from_p, 2));
      else
	{
	  assign = gimple_build_call_from_tree (*from_p);
	  gimple_call_set_fntype (assign, TREE_TYPE (fnptrtype));
	}
      notice_special_calls (assign);
      if (!gimple_call_noreturn_p (assign))
	gimple_call_set_lhs (assign, *to_p);
    }
  else
    {
      assign = gimple_build_assign (*to_p, *from_p);
      gimple_set_location (assign, EXPR_LOCATION (*expr_p));
    }

  if (gimplify_ctxp->into_ssa && is_gimple_reg (*to_p))
    {
      /* We should have got an SSA name from the start.  */
      gcc_assert (TREE_CODE (*to_p) == SSA_NAME);
    }

  gimplify_seq_add_stmt (pre_p, assign);
  gsi = gsi_last (*pre_p);
  maybe_fold_stmt (&gsi);

  if (want_value)
    {
      *expr_p = TREE_THIS_VOLATILE (*to_p) ? *from_p : unshare_expr (*to_p);
      return GS_OK;
    }
  else
    *expr_p = NULL;

  return GS_ALL_DONE;
}

/* Gimplify a comparison between two variable-sized objects.  Do this
   with a call to BUILT_IN_MEMCMP.  */

static enum gimplify_status
gimplify_variable_sized_compare (tree *expr_p)
{
  location_t loc = EXPR_LOCATION (*expr_p);
  tree op0 = TREE_OPERAND (*expr_p, 0);
  tree op1 = TREE_OPERAND (*expr_p, 1);
  tree t, arg, dest, src, expr;

  arg = TYPE_SIZE_UNIT (TREE_TYPE (op0));
  arg = unshare_expr (arg);
  arg = SUBSTITUTE_PLACEHOLDER_IN_EXPR (arg, op0);
  src = build_fold_addr_expr_loc (loc, op1);
  dest = build_fold_addr_expr_loc (loc, op0);
  t = builtin_decl_implicit (BUILT_IN_MEMCMP);
  t = build_call_expr_loc (loc, t, 3, dest, src, arg);

  expr
    = build2 (TREE_CODE (*expr_p), TREE_TYPE (*expr_p), t, integer_zero_node);
  SET_EXPR_LOCATION (expr, loc);
  *expr_p = expr;

  return GS_OK;
}

/* Gimplify a comparison between two aggregate objects of integral scalar
   mode as a comparison between the bitwise equivalent scalar values.  */

static enum gimplify_status
gimplify_scalar_mode_aggregate_compare (tree *expr_p)
{
  location_t loc = EXPR_LOCATION (*expr_p);
  tree op0 = TREE_OPERAND (*expr_p, 0);
  tree op1 = TREE_OPERAND (*expr_p, 1);

  tree type = TREE_TYPE (op0);
  tree scalar_type = lang_hooks.types.type_for_mode (TYPE_MODE (type), 1);

  op0 = fold_build1_loc (loc, VIEW_CONVERT_EXPR, scalar_type, op0);
  op1 = fold_build1_loc (loc, VIEW_CONVERT_EXPR, scalar_type, op1);

  *expr_p
    = fold_build2_loc (loc, TREE_CODE (*expr_p), TREE_TYPE (*expr_p), op0, op1);

  return GS_OK;
}

/* Gimplify an expression sequence.  This function gimplifies each
   expression and rewrites the original expression with the last
   expression of the sequence in GIMPLE form.

   PRE_P points to the list where the side effects for all the
       expressions in the sequence will be emitted.

   WANT_VALUE is true when the result of the last COMPOUND_EXPR is used.  */

static enum gimplify_status
gimplify_compound_expr (tree *expr_p, gimple_seq *pre_p, bool want_value)
{
  tree t = *expr_p;

  do
    {
      tree *sub_p = &TREE_OPERAND (t, 0);

      if (TREE_CODE (*sub_p) == COMPOUND_EXPR)
	gimplify_compound_expr (sub_p, pre_p, false);
      else
	gimplify_stmt (sub_p, pre_p);

      t = TREE_OPERAND (t, 1);
    }
  while (TREE_CODE (t) == COMPOUND_EXPR);

  *expr_p = t;
  if (want_value)
    return GS_OK;
  else
    {
      gimplify_stmt (expr_p, pre_p);
      return GS_ALL_DONE;
    }
}

/* Gimplify a SAVE_EXPR node.  EXPR_P points to the expression to
   gimplify.  After gimplification, EXPR_P will point to a new temporary
   that holds the original value of the SAVE_EXPR node.

   PRE_P points to the list where side effects that must happen before
   *EXPR_P should be stored.  */

static enum gimplify_status
gimplify_save_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
  enum gimplify_status ret = GS_ALL_DONE;
  tree val;

  gcc_assert (TREE_CODE (*expr_p) == SAVE_EXPR);
  val = TREE_OPERAND (*expr_p, 0);

  /* If the SAVE_EXPR has not been resolved, then evaluate it once.  */
  if (!SAVE_EXPR_RESOLVED_P (*expr_p))
    {
      /* The operand may be a void-valued expression such as SAVE_EXPRs
	 generated by the Java frontend for class initialization.  It is
	 being executed only for its side-effects.  */
      if (TREE_TYPE (val) == void_type_node)
	{
	  ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
			       is_gimple_stmt, fb_none);
	  val = NULL;
	}
      else
	val = get_initialized_tmp_var (val, pre_p, post_p);

      TREE_OPERAND (*expr_p, 0) = val;
      SAVE_EXPR_RESOLVED_P (*expr_p) = 1;
    }

  *expr_p = val;

  return ret;
}

/* Rewrite the ADDR_EXPR node pointed to by EXPR_P

      unary_expr
	      : ...
	      | '&' varname
	      ...

    PRE_P points to the list where side effects that must happen before
	*EXPR_P should be stored.

    POST_P points to the list where side effects that must happen after
	*EXPR_P should be stored.  */

static enum gimplify_status
gimplify_addr_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
  tree expr = *expr_p;
  tree op0 = TREE_OPERAND (expr, 0);
  enum gimplify_status ret;
  location_t loc = EXPR_LOCATION (*expr_p);

  switch (TREE_CODE (op0))
    {
    case INDIRECT_REF:
    do_indirect_ref:
      /* Check if we are dealing with an expression of the form '&*ptr'.
	 While the front end folds away '&*ptr' into 'ptr', these
	 expressions may be generated internally by the compiler (e.g.,
	 builtins like __builtin_va_end).  */
      /* Caution: the silent array decomposition semantics we allow for
	 ADDR_EXPR means we can't always discard the pair.  */
      /* Gimplification of the ADDR_EXPR operand may drop
	 cv-qualification conversions, so make sure we add them if
	 needed.  */
      {
	tree op00 = TREE_OPERAND (op0, 0);
	tree t_expr = TREE_TYPE (expr);
	tree t_op00 = TREE_TYPE (op00);

        if (!useless_type_conversion_p (t_expr, t_op00))
	  op00 = fold_convert_loc (loc, TREE_TYPE (expr), op00);
        *expr_p = op00;
        ret = GS_OK;
      }
      break;

    case VIEW_CONVERT_EXPR:
      /* Take the address of our operand and then convert it to the type of
	 this ADDR_EXPR.

	 ??? The interactions of VIEW_CONVERT_EXPR and aliasing is not at
	 all clear.  The impact of this transformation is even less clear.  */

      /* If the operand is a useless conversion, look through it.  Doing so
	 guarantees that the ADDR_EXPR and its operand will remain of the
	 same type.  */
      if (tree_ssa_useless_type_conversion (TREE_OPERAND (op0, 0)))
	op0 = TREE_OPERAND (op0, 0);

      *expr_p = fold_convert_loc (loc, TREE_TYPE (expr),
				  build_fold_addr_expr_loc (loc,
							TREE_OPERAND (op0, 0)));
      ret = GS_OK;
      break;

    default:
      /* We use fb_either here because the C frontend sometimes takes
	 the address of a call that returns a struct; see
	 gcc.dg/c99-array-lval-1.c.  The gimplifier will correctly make
	 the implied temporary explicit.  */

      /* Make the operand addressable.  */
      ret = gimplify_expr (&TREE_OPERAND (expr, 0), pre_p, post_p,
			   is_gimple_addressable, fb_either);
      if (ret == GS_ERROR)
	break;

      /* Then mark it.  Beware that it may not be possible to do so directly
	 if a temporary has been created by the gimplification.  */
      prepare_gimple_addressable (&TREE_OPERAND (expr, 0), pre_p);

      op0 = TREE_OPERAND (expr, 0);

      /* For various reasons, the gimplification of the expression
	 may have made a new INDIRECT_REF.  */
      if (TREE_CODE (op0) == INDIRECT_REF)
	goto do_indirect_ref;

      mark_addressable (TREE_OPERAND (expr, 0));

      /* Fix to PR/41163 (r151122) broke LIPO. Calls to builtin functions
         were 'canonicized' in profile-use pass, but not in profile-gen. */
      if (!flag_dyn_ipa)
        {
          /* The FEs may end up building ADDR_EXPRs early on a decl with
             an incomplete type.  Re-build ADDR_EXPRs in canonical form
             here.  */
          if (!types_compatible_p (TREE_TYPE (op0), TREE_TYPE (TREE_TYPE (expr))))
            *expr_p = build_fold_addr_expr (op0);
        }

      /* Make sure TREE_CONSTANT and TREE_SIDE_EFFECTS are set properly.  */
      recompute_tree_invariant_for_addr_expr (*expr_p);

      /* Fix to PR/41163 (r151122) broke LIPO. Calls to builtin functions
         were 'canonicized' in profile-use pass, but not in profile-gen. */
      if (!flag_dyn_ipa)
        {
          /* If we re-built the ADDR_EXPR add a conversion to the original type
             if required.  */
          if (!useless_type_conversion_p (TREE_TYPE (expr), TREE_TYPE (*expr_p)))
            *expr_p = fold_convert (TREE_TYPE (expr), *expr_p);
        }

      break;
    }

  return ret;
}

/* Gimplify the operands of an ASM_EXPR.  Input operands should be a gimple
   value; output operands should be a gimple lvalue.  */

static enum gimplify_status
gimplify_asm_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
  tree expr;
  int noutputs;
  const char **oconstraints;
  int i;
  tree link;
  const char *constraint;
  bool allows_mem, allows_reg, is_inout;
  enum gimplify_status ret, tret;
  gimple stmt;
  vec<tree, va_gc> *inputs;
  vec<tree, va_gc> *outputs;
  vec<tree, va_gc> *clobbers;
  vec<tree, va_gc> *labels;
  tree link_next;

  expr = *expr_p;
  noutputs = list_length (ASM_OUTPUTS (expr));
  oconstraints = (const char **) alloca ((noutputs) * sizeof (const char *));

  inputs = NULL;
  outputs = NULL;
  clobbers = NULL;
  labels = NULL;

  ret = GS_ALL_DONE;
  link_next = NULL_TREE;
  for (i = 0, link = ASM_OUTPUTS (expr); link; ++i, link = link_next)
    {
      bool ok;
      size_t constraint_len;

      link_next = TREE_CHAIN (link);

      oconstraints[i]
	= constraint
	= TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (link)));
      constraint_len = strlen (constraint);
      if (constraint_len == 0)
        continue;

      ok = parse_output_constraint (&constraint, i, 0, 0,
				    &allows_mem, &allows_reg, &is_inout);
      if (!ok)
	{
	  ret = GS_ERROR;
	  is_inout = false;
	}

      if (!allows_reg && allows_mem)
	mark_addressable (TREE_VALUE (link));

      tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p,
			    is_inout ? is_gimple_min_lval : is_gimple_lvalue,
			    fb_lvalue | fb_mayfail);
      if (tret == GS_ERROR)
	{
	  error ("invalid lvalue in asm output %d", i);
	  ret = tret;
	}

      vec_safe_push (outputs, link);
      TREE_CHAIN (link) = NULL_TREE;

      if (is_inout)
	{
	  /* An input/output operand.  To give the optimizers more
	     flexibility, split it into separate input and output
 	     operands.  */
	  tree input;
	  char buf[10];

	  /* Turn the in/out constraint into an output constraint.  */
	  char *p = xstrdup (constraint);
	  p[0] = '=';
	  TREE_VALUE (TREE_PURPOSE (link)) = build_string (constraint_len, p);

	  /* And add a matching input constraint.  */
	  if (allows_reg)
	    {
	      sprintf (buf, "%d", i);

	      /* If there are multiple alternatives in the constraint,
		 handle each of them individually.  Those that allow register
		 will be replaced with operand number, the others will stay
		 unchanged.  */
	      if (strchr (p, ',') != NULL)
		{
		  size_t len = 0, buflen = strlen (buf);
		  char *beg, *end, *str, *dst;

		  for (beg = p + 1;;)
		    {
		      end = strchr (beg, ',');
		      if (end == NULL)
			end = strchr (beg, '\0');
		      if ((size_t) (end - beg) < buflen)
			len += buflen + 1;
		      else
			len += end - beg + 1;
		      if (*end)
			beg = end + 1;
		      else
			break;
		    }

		  str = (char *) alloca (len);
		  for (beg = p + 1, dst = str;;)
		    {
		      const char *tem;
		      bool mem_p, reg_p, inout_p;

		      end = strchr (beg, ',');
		      if (end)
			*end = '\0';
		      beg[-1] = '=';
		      tem = beg - 1;
		      parse_output_constraint (&tem, i, 0, 0,
					       &mem_p, &reg_p, &inout_p);
		      if (dst != str)
			*dst++ = ',';
		      if (reg_p)
			{
			  memcpy (dst, buf, buflen);
			  dst += buflen;
			}
		      else
			{
			  if (end)
			    len = end - beg;
			  else
			    len = strlen (beg);
			  memcpy (dst, beg, len);
			  dst += len;
			}
		      if (end)
			beg = end + 1;
		      else
			break;
		    }
		  *dst = '\0';
		  input = build_string (dst - str, str);
		}
	      else
		input = build_string (strlen (buf), buf);
	    }
	  else
	    input = build_string (constraint_len - 1, constraint + 1);

	  free (p);

	  input = build_tree_list (build_tree_list (NULL_TREE, input),
				   unshare_expr (TREE_VALUE (link)));
	  ASM_INPUTS (expr) = chainon (ASM_INPUTS (expr), input);
	}
    }

  link_next = NULL_TREE;
  for (link = ASM_INPUTS (expr); link; ++i, link = link_next)
    {
      link_next = TREE_CHAIN (link);
      constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (link)));
      parse_input_constraint (&constraint, 0, 0, noutputs, 0,
			      oconstraints, &allows_mem, &allows_reg);

      /* If we can't make copies, we can only accept memory.  */
      if (TREE_ADDRESSABLE (TREE_TYPE (TREE_VALUE (link))))
	{
	  if (allows_mem)
	    allows_reg = 0;
	  else
	    {
	      error ("impossible constraint in %<asm%>");
	      error ("non-memory input %d must stay in memory", i);
	      return GS_ERROR;
	    }
	}

      /* If the operand is a memory input, it should be an lvalue.  */
      if (!allows_reg && allows_mem)
	{
	  tree inputv = TREE_VALUE (link);
	  STRIP_NOPS (inputv);
	  if (TREE_CODE (inputv) == PREDECREMENT_EXPR
	      || TREE_CODE (inputv) == PREINCREMENT_EXPR
	      || TREE_CODE (inputv) == POSTDECREMENT_EXPR
	      || TREE_CODE (inputv) == POSTINCREMENT_EXPR)
	    TREE_VALUE (link) = error_mark_node;
	  tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p,
				is_gimple_lvalue, fb_lvalue | fb_mayfail);
	  mark_addressable (TREE_VALUE (link));
	  if (tret == GS_ERROR)
	    {
	      if (EXPR_HAS_LOCATION (TREE_VALUE (link)))
	        input_location = EXPR_LOCATION (TREE_VALUE (link));
	      error ("memory input %d is not directly addressable", i);
	      ret = tret;
	    }
	}
      else
	{
	  tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p,
				is_gimple_asm_val, fb_rvalue);
	  if (tret == GS_ERROR)
	    ret = tret;
	}

      TREE_CHAIN (link) = NULL_TREE;
      vec_safe_push (inputs, link);
    }

  link_next = NULL_TREE;
  for (link = ASM_CLOBBERS (expr); link; ++i, link = link_next)
    {
      link_next = TREE_CHAIN (link);
      TREE_CHAIN (link) = NULL_TREE;
      vec_safe_push (clobbers, link);
    }

  link_next = NULL_TREE;
  for (link = ASM_LABELS (expr); link; ++i, link = link_next)
    {
      link_next = TREE_CHAIN (link);
      TREE_CHAIN (link) = NULL_TREE;
      vec_safe_push (labels, link);
    }

  /* Do not add ASMs with errors to the gimple IL stream.  */
  if (ret != GS_ERROR)
    {
      stmt = gimple_build_asm_vec (TREE_STRING_POINTER (ASM_STRING (expr)),
				   inputs, outputs, clobbers, labels);

      gimple_asm_set_volatile (stmt, ASM_VOLATILE_P (expr));
      gimple_asm_set_input (stmt, ASM_INPUT_P (expr));

      gimplify_seq_add_stmt (pre_p, stmt);
    }

  return ret;
}

/* Gimplify a CLEANUP_POINT_EXPR.  Currently this works by adding
   GIMPLE_WITH_CLEANUP_EXPRs to the prequeue as we encounter cleanups while
   gimplifying the body, and converting them to TRY_FINALLY_EXPRs when we
   return to this function.

   FIXME should we complexify the prequeue handling instead?  Or use flags
   for all the cleanups and let the optimizer tighten them up?  The current
   code seems pretty fragile; it will break on a cleanup within any
   non-conditional nesting.  But any such nesting would be broken, anyway;
   we can't write a TRY_FINALLY_EXPR that starts inside a nesting construct
   and continues out of it.  We can do that at the RTL level, though, so
   having an optimizer to tighten up try/finally regions would be a Good
   Thing.  */

static enum gimplify_status
gimplify_cleanup_point_expr (tree *expr_p, gimple_seq *pre_p)
{
  gimple_stmt_iterator iter;
  gimple_seq body_sequence = NULL;

  tree temp = voidify_wrapper_expr (*expr_p, NULL);

  /* We only care about the number of conditions between the innermost
     CLEANUP_POINT_EXPR and the cleanup.  So save and reset the count and
     any cleanups collected outside the CLEANUP_POINT_EXPR.  */
  int old_conds = gimplify_ctxp->conditions;
  gimple_seq old_cleanups = gimplify_ctxp->conditional_cleanups;
  bool old_in_cleanup_point_expr = gimplify_ctxp->in_cleanup_point_expr;
  gimplify_ctxp->conditions = 0;
  gimplify_ctxp->conditional_cleanups = NULL;
  gimplify_ctxp->in_cleanup_point_expr = true;

  gimplify_stmt (&TREE_OPERAND (*expr_p, 0), &body_sequence);

  gimplify_ctxp->conditions = old_conds;
  gimplify_ctxp->conditional_cleanups = old_cleanups;
  gimplify_ctxp->in_cleanup_point_expr = old_in_cleanup_point_expr;

  for (iter = gsi_start (body_sequence); !gsi_end_p (iter); )
    {
      gimple wce = gsi_stmt (iter);

      if (gimple_code (wce) == GIMPLE_WITH_CLEANUP_EXPR)
	{
	  if (gsi_one_before_end_p (iter))
	    {
              /* Note that gsi_insert_seq_before and gsi_remove do not
                 scan operands, unlike some other sequence mutators.  */
	      if (!gimple_wce_cleanup_eh_only (wce))
		gsi_insert_seq_before_without_update (&iter,
						      gimple_wce_cleanup (wce),
						      GSI_SAME_STMT);
	      gsi_remove (&iter, true);
	      break;
	    }
	  else
	    {
	      gimple_statement_try *gtry;
	      gimple_seq seq;
	      enum gimple_try_flags kind;

	      if (gimple_wce_cleanup_eh_only (wce))
		kind = GIMPLE_TRY_CATCH;
	      else
		kind = GIMPLE_TRY_FINALLY;
	      seq = gsi_split_seq_after (iter);

	      gtry = gimple_build_try (seq, gimple_wce_cleanup (wce), kind);
              /* Do not use gsi_replace here, as it may scan operands.
                 We want to do a simple structural modification only.  */
	      gsi_set_stmt (&iter, gtry);
	      iter = gsi_start (gtry->eval);
	    }
	}
      else
	gsi_next (&iter);
    }

  gimplify_seq_add_seq (pre_p, body_sequence);
  if (temp)
    {
      *expr_p = temp;
      return GS_OK;
    }
  else
    {
      *expr_p = NULL;
      return GS_ALL_DONE;
    }
}

/* Insert a cleanup marker for gimplify_cleanup_point_expr.  CLEANUP
   is the cleanup action required.  EH_ONLY is true if the cleanup should
   only be executed if an exception is thrown, not on normal exit.  */

static void
gimple_push_cleanup (tree var, tree cleanup, bool eh_only, gimple_seq *pre_p)
{
  gimple wce;
  gimple_seq cleanup_stmts = NULL;

  /* Errors can result in improperly nested cleanups.  Which results in
     confusion when trying to resolve the GIMPLE_WITH_CLEANUP_EXPR.  */
  if (seen_error ())
    return;

  if (gimple_conditional_context ())
    {
      /* If we're in a conditional context, this is more complex.  We only
	 want to run the cleanup if we actually ran the initialization that
	 necessitates it, but we want to run it after the end of the
	 conditional context.  So we wrap the try/finally around the
	 condition and use a flag to determine whether or not to actually
	 run the destructor.  Thus

	   test ? f(A()) : 0

	 becomes (approximately)

	   flag = 0;
	   try {
	     if (test) { A::A(temp); flag = 1; val = f(temp); }
	     else { val = 0; }
	   } finally {
	     if (flag) A::~A(temp);
	   }
	   val
      */
      tree flag = create_tmp_var (boolean_type_node, "cleanup");
      gimple ffalse = gimple_build_assign (flag, boolean_false_node);
      gimple ftrue = gimple_build_assign (flag, boolean_true_node);

      cleanup = build3 (COND_EXPR, void_type_node, flag, cleanup, NULL);
      gimplify_stmt (&cleanup, &cleanup_stmts);
      wce = gimple_build_wce (cleanup_stmts);

      gimplify_seq_add_stmt (&gimplify_ctxp->conditional_cleanups, ffalse);
      gimplify_seq_add_stmt (&gimplify_ctxp->conditional_cleanups, wce);
      gimplify_seq_add_stmt (pre_p, ftrue);

      /* Because of this manipulation, and the EH edges that jump
	 threading cannot redirect, the temporary (VAR) will appear
	 to be used uninitialized.  Don't warn.  */
      TREE_NO_WARNING (var) = 1;
    }
  else
    {
      gimplify_stmt (&cleanup, &cleanup_stmts);
      wce = gimple_build_wce (cleanup_stmts);
      gimple_wce_set_cleanup_eh_only (wce, eh_only);
      gimplify_seq_add_stmt (pre_p, wce);
    }
}

/* Gimplify a TARGET_EXPR which doesn't appear on the rhs of an INIT_EXPR.  */

static enum gimplify_status
gimplify_target_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
  tree targ = *expr_p;
  tree temp = TARGET_EXPR_SLOT (targ);
  tree init = TARGET_EXPR_INITIAL (targ);
  enum gimplify_status ret;

  if (init)
    {
      tree cleanup = NULL_TREE;

      /* TARGET_EXPR temps aren't part of the enclosing block, so add it
	 to the temps list.  Handle also variable length TARGET_EXPRs.  */
      if (TREE_CODE (DECL_SIZE (temp)) != INTEGER_CST)
	{
	  if (!TYPE_SIZES_GIMPLIFIED (TREE_TYPE (temp)))
	    gimplify_type_sizes (TREE_TYPE (temp), pre_p);
	  gimplify_vla_decl (temp, pre_p);
	}
      else
	gimple_add_tmp_var (temp);

      /* If TARGET_EXPR_INITIAL is void, then the mere evaluation of the
	 expression is supposed to initialize the slot.  */
      if (VOID_TYPE_P (TREE_TYPE (init)))
	ret = gimplify_expr (&init, pre_p, post_p, is_gimple_stmt, fb_none);
      else
	{
	  tree init_expr = build2 (INIT_EXPR, void_type_node, temp, init);
	  init = init_expr;
	  ret = gimplify_expr (&init, pre_p, post_p, is_gimple_stmt, fb_none);
	  init = NULL;
	  ggc_free (init_expr);
	}
      if (ret == GS_ERROR)
	{
	  /* PR c++/28266 Make sure this is expanded only once. */
	  TARGET_EXPR_INITIAL (targ) = NULL_TREE;
	  return GS_ERROR;
	}
      if (init)
	gimplify_and_add (init, pre_p);

      /* If needed, push the cleanup for the temp.  */
      if (TARGET_EXPR_CLEANUP (targ))
	{
	  if (CLEANUP_EH_ONLY (targ))
	    gimple_push_cleanup (temp, TARGET_EXPR_CLEANUP (targ),
				 CLEANUP_EH_ONLY (targ), pre_p);
	  else
	    cleanup = TARGET_EXPR_CLEANUP (targ);
	}

      /* Add a clobber for the temporary going out of scope, like
	 gimplify_bind_expr.  */
      if (gimplify_ctxp->in_cleanup_point_expr
	  && needs_to_live_in_memory (temp)
	  && flag_stack_reuse == SR_ALL)
	{
	  tree clobber = build_constructor (TREE_TYPE (temp),
					    NULL);
	  TREE_THIS_VOLATILE (clobber) = true;
	  clobber = build2 (MODIFY_EXPR, TREE_TYPE (temp), temp, clobber);
	  if (cleanup)
	    cleanup = build2 (COMPOUND_EXPR, void_type_node, cleanup,
			      clobber);
	  else
	    cleanup = clobber;
	}

      if (cleanup)
	gimple_push_cleanup (temp, cleanup, false, pre_p);

      /* Only expand this once.  */
      TREE_OPERAND (targ, 3) = init;
      TARGET_EXPR_INITIAL (targ) = NULL_TREE;
    }
  else
    /* We should have expanded this before.  */
    gcc_assert (DECL_SEEN_IN_BIND_EXPR_P (temp));

  *expr_p = temp;
  return GS_OK;
}

/* Gimplification of expression trees.  */

/* Gimplify an expression which appears at statement context.  The
   corresponding GIMPLE statements are added to *SEQ_P.  If *SEQ_P is
   NULL, a new sequence is allocated.

   Return true if we actually added a statement to the queue.  */

bool
gimplify_stmt (tree *stmt_p, gimple_seq *seq_p)
{
  gimple_seq_node last;

  last = gimple_seq_last (*seq_p);
  gimplify_expr (stmt_p, seq_p, NULL, is_gimple_stmt, fb_none);
  return last != gimple_seq_last (*seq_p);
}

/* Add FIRSTPRIVATE entries for DECL in the OpenMP the surrounding parallels
   to CTX.  If entries already exist, force them to be some flavor of private.
   If there is no enclosing parallel, do nothing.  */

void
omp_firstprivatize_variable (struct gimplify_omp_ctx *ctx, tree decl)
{
  splay_tree_node n;

  if (decl == NULL || !DECL_P (decl))
    return;

  do
    {
      n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl);
      if (n != NULL)
	{
	  if (n->value & GOVD_SHARED)
	    n->value = GOVD_FIRSTPRIVATE | (n->value & GOVD_SEEN);
	  else if (n->value & GOVD_MAP)
	    n->value |= GOVD_MAP_TO_ONLY;
	  else
	    return;
	}
      else if (ctx->region_type == ORT_TARGET)
	omp_add_variable (ctx, decl, GOVD_MAP | GOVD_MAP_TO_ONLY);
      else if (ctx->region_type != ORT_WORKSHARE
	       && ctx->region_type != ORT_SIMD
	       && ctx->region_type != ORT_TARGET_DATA)
	omp_add_variable (ctx, decl, GOVD_FIRSTPRIVATE);

      ctx = ctx->outer_context;
    }
  while (ctx);
}

/* Similarly for each of the type sizes of TYPE.  */

static void
omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *ctx, tree type)
{
  if (type == NULL || type == error_mark_node)
    return;
  type = TYPE_MAIN_VARIANT (type);

  if (pointer_set_insert (ctx->privatized_types, type))
    return;

  switch (TREE_CODE (type))
    {
    case INTEGER_TYPE:
    case ENUMERAL_TYPE:
    case BOOLEAN_TYPE:
    case REAL_TYPE:
    case FIXED_POINT_TYPE:
      omp_firstprivatize_variable (ctx, TYPE_MIN_VALUE (type));
      omp_firstprivatize_variable (ctx, TYPE_MAX_VALUE (type));
      break;

    case ARRAY_TYPE:
      omp_firstprivatize_type_sizes (ctx, TREE_TYPE (type));
      omp_firstprivatize_type_sizes (ctx, TYPE_DOMAIN (type));
      break;

    case RECORD_TYPE:
    case UNION_TYPE:
    case QUAL_UNION_TYPE:
      {
	tree field;
	for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
	  if (TREE_CODE (field) == FIELD_DECL)
	    {
	      omp_firstprivatize_variable (ctx, DECL_FIELD_OFFSET (field));
	      omp_firstprivatize_type_sizes (ctx, TREE_TYPE (field));
	    }
      }
      break;

    case POINTER_TYPE:
    case REFERENCE_TYPE:
      omp_firstprivatize_type_sizes (ctx, TREE_TYPE (type));
      break;

    default:
      break;
    }

  omp_firstprivatize_variable (ctx, TYPE_SIZE (type));
  omp_firstprivatize_variable (ctx, TYPE_SIZE_UNIT (type));
  lang_hooks.types.omp_firstprivatize_type_sizes (ctx, type);
}

/* Add an entry for DECL in the OpenMP context CTX with FLAGS.  */

static void
omp_add_variable (struct gimplify_omp_ctx *ctx, tree decl, unsigned int flags)
{
  splay_tree_node n;
  unsigned int nflags;
  tree t;

  if (error_operand_p (decl))
    return;

  /* Never elide decls whose type has TREE_ADDRESSABLE set.  This means
     there are constructors involved somewhere.  */
  if (TREE_ADDRESSABLE (TREE_TYPE (decl))
      || TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
    flags |= GOVD_SEEN;

  n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl);
  if (n != NULL && n->value != GOVD_ALIGNED)
    {
      /* We shouldn't be re-adding the decl with the same data
	 sharing class.  */
      gcc_assert ((n->value & GOVD_DATA_SHARE_CLASS & flags) == 0);
      /* The only combination of data sharing classes we should see is
	 FIRSTPRIVATE and LASTPRIVATE.  */
      nflags = n->value | flags;
      gcc_assert ((nflags & GOVD_DATA_SHARE_CLASS)
		  == (GOVD_FIRSTPRIVATE | GOVD_LASTPRIVATE)
		  || (flags & GOVD_DATA_SHARE_CLASS) == 0);
      n->value = nflags;
      return;
    }

  /* When adding a variable-sized variable, we have to handle all sorts
     of additional bits of data: the pointer replacement variable, and
     the parameters of the type.  */
  if (DECL_SIZE (decl) && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
    {
      /* Add the pointer replacement variable as PRIVATE if the variable
	 replacement is private, else FIRSTPRIVATE since we'll need the
	 address of the original variable either for SHARED, or for the
	 copy into or out of the context.  */
      if (!(flags & GOVD_LOCAL))
	{
	  nflags = flags & GOVD_MAP
		   ? GOVD_MAP | GOVD_MAP_TO_ONLY | GOVD_EXPLICIT
		   : flags & GOVD_PRIVATE ? GOVD_PRIVATE : GOVD_FIRSTPRIVATE;
	  nflags |= flags & GOVD_SEEN;
	  t = DECL_VALUE_EXPR (decl);
	  gcc_assert (TREE_CODE (t) == INDIRECT_REF);
	  t = TREE_OPERAND (t, 0);
	  gcc_assert (DECL_P (t));
	  omp_add_variable (ctx, t, nflags);
	}

      /* Add all of the variable and type parameters (which should have
	 been gimplified to a formal temporary) as FIRSTPRIVATE.  */
      omp_firstprivatize_variable (ctx, DECL_SIZE_UNIT (decl));
      omp_firstprivatize_variable (ctx, DECL_SIZE (decl));
      omp_firstprivatize_type_sizes (ctx, TREE_TYPE (decl));

      /* The variable-sized variable itself is never SHARED, only some form
	 of PRIVATE.  The sharing would take place via the pointer variable
	 which we remapped above.  */
      if (flags & GOVD_SHARED)
	flags = GOVD_PRIVATE | GOVD_DEBUG_PRIVATE
		| (flags & (GOVD_SEEN | GOVD_EXPLICIT));

      /* We're going to make use of the TYPE_SIZE_UNIT at least in the
	 alloca statement we generate for the variable, so make sure it
	 is available.  This isn't automatically needed for the SHARED
	 case, since we won't be allocating local storage then.
	 For local variables TYPE_SIZE_UNIT might not be gimplified yet,
	 in this case omp_notice_variable will be called later
	 on when it is gimplified.  */
      else if (! (flags & (GOVD_LOCAL | GOVD_MAP))
	       && DECL_P (TYPE_SIZE_UNIT (TREE_TYPE (decl))))
	omp_notice_variable (ctx, TYPE_SIZE_UNIT (TREE_TYPE (decl)), true);
    }
  else if ((flags & (GOVD_MAP | GOVD_LOCAL)) == 0
	   && lang_hooks.decls.omp_privatize_by_reference (decl))
    {
      omp_firstprivatize_type_sizes (ctx, TREE_TYPE (decl));

      /* Similar to the direct variable sized case above, we'll need the
	 size of references being privatized.  */
      if ((flags & GOVD_SHARED) == 0)
	{
	  t = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl)));
	  if (TREE_CODE (t) != INTEGER_CST)
	    omp_notice_variable (ctx, t, true);
	}
    }

  if (n != NULL)
    n->value |= flags;
  else
    splay_tree_insert (ctx->variables, (splay_tree_key)decl, flags);
}

/* Notice a threadprivate variable DECL used in OpenMP context CTX.
   This just prints out diagnostics about threadprivate variable uses
   in untied tasks.  If DECL2 is non-NULL, prevent this warning
   on that variable.  */

static bool
omp_notice_threadprivate_variable (struct gimplify_omp_ctx *ctx, tree decl,
				   tree decl2)
{
  splay_tree_node n;
  struct gimplify_omp_ctx *octx;

  for (octx = ctx; octx; octx = octx->outer_context)
    if (octx->region_type == ORT_TARGET)
      {
	n = splay_tree_lookup (octx->variables, (splay_tree_key)decl);
	if (n == NULL)
	  {
	    error ("threadprivate variable %qE used in target region",
		   DECL_NAME (decl));
	    error_at (octx->location, "enclosing target region");
	    splay_tree_insert (octx->variables, (splay_tree_key)decl, 0);
	  }
	if (decl2)
	  splay_tree_insert (octx->variables, (splay_tree_key)decl2, 0);
      }

  if (ctx->region_type != ORT_UNTIED_TASK)
    return false;
  n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl);
  if (n == NULL)
    {
      error ("threadprivate variable %qE used in untied task",
	     DECL_NAME (decl));
      error_at (ctx->location, "enclosing task");
      splay_tree_insert (ctx->variables, (splay_tree_key)decl, 0);
    }
  if (decl2)
    splay_tree_insert (ctx->variables, (splay_tree_key)decl2, 0);
  return false;
}

/* Record the fact that DECL was used within the OpenMP context CTX.
   IN_CODE is true when real code uses DECL, and false when we should
   merely emit default(none) errors.  Return true if DECL is going to
   be remapped and thus DECL shouldn't be gimplified into its
   DECL_VALUE_EXPR (if any).  */

static bool
omp_notice_variable (struct gimplify_omp_ctx *ctx, tree decl, bool in_code)
{
  splay_tree_node n;
  unsigned flags = in_code ? GOVD_SEEN : 0;
  bool ret = false, shared;

  if (error_operand_p (decl))
    return false;

  /* Threadprivate variables are predetermined.  */
  if (is_global_var (decl))
    {
      if (DECL_THREAD_LOCAL_P (decl))
	return omp_notice_threadprivate_variable (ctx, decl, NULL_TREE);

      if (DECL_HAS_VALUE_EXPR_P (decl))
	{
	  tree value = get_base_address (DECL_VALUE_EXPR (decl));

	  if (value && DECL_P (value) && DECL_THREAD_LOCAL_P (value))
	    return omp_notice_threadprivate_variable (ctx, decl, value);
	}
    }

  n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl);
  if (ctx->region_type == ORT_TARGET)
    {
      ret = lang_hooks.decls.omp_disregard_value_expr (decl, true);
      if (n == NULL)
	{
	  if (!lang_hooks.types.omp_mappable_type (TREE_TYPE (decl)))
	    {
	      error ("%qD referenced in target region does not have "
		     "a mappable type", decl);
	      omp_add_variable (ctx, decl, GOVD_MAP | GOVD_EXPLICIT | flags);
	    }
	  else
	    omp_add_variable (ctx, decl, GOVD_MAP | flags);
	}
      else
	{
	  /* If nothing changed, there's nothing left to do.  */
	  if ((n->value & flags) == flags)
	    return ret;
	  n->value |= flags;
	}
      goto do_outer;
    }

  if (n == NULL)
    {
      enum omp_clause_default_kind default_kind, kind;
      struct gimplify_omp_ctx *octx;

      if (ctx->region_type == ORT_WORKSHARE
	  || ctx->region_type == ORT_SIMD
	  || ctx->region_type == ORT_TARGET_DATA)
	goto do_outer;

      /* ??? Some compiler-generated variables (like SAVE_EXPRs) could be
	 remapped firstprivate instead of shared.  To some extent this is
	 addressed in omp_firstprivatize_type_sizes, but not effectively.  */
      default_kind = ctx->default_kind;
      kind = lang_hooks.decls.omp_predetermined_sharing (decl);
      if (kind != OMP_CLAUSE_DEFAULT_UNSPECIFIED)
	default_kind = kind;

      switch (default_kind)
	{
	case OMP_CLAUSE_DEFAULT_NONE:
	  if ((ctx->region_type & ORT_TASK) != 0)
	    {
	      error ("%qE not specified in enclosing task",
		     DECL_NAME (lang_hooks.decls.omp_report_decl (decl)));
	      error_at (ctx->location, "enclosing task");
	    }
	  else if (ctx->region_type == ORT_TEAMS)
	    {
	      error ("%qE not specified in enclosing teams construct",
		     DECL_NAME (lang_hooks.decls.omp_report_decl (decl)));
	      error_at (ctx->location, "enclosing teams construct");
	    }
	  else
	    {
	      error ("%qE not specified in enclosing parallel",
		     DECL_NAME (lang_hooks.decls.omp_report_decl (decl)));
	      error_at (ctx->location, "enclosing parallel");
	    }
	  /* FALLTHRU */
	case OMP_CLAUSE_DEFAULT_SHARED:
	  flags |= GOVD_SHARED;
	  break;
	case OMP_CLAUSE_DEFAULT_PRIVATE:
	  flags |= GOVD_PRIVATE;
	  break;
	case OMP_CLAUSE_DEFAULT_FIRSTPRIVATE:
	  flags |= GOVD_FIRSTPRIVATE;
	  break;
	case OMP_CLAUSE_DEFAULT_UNSPECIFIED:
	  /* decl will be either GOVD_FIRSTPRIVATE or GOVD_SHARED.  */
	  gcc_assert ((ctx->region_type & ORT_TASK) != 0);
	  if (ctx->outer_context)
	    omp_notice_variable (ctx->outer_context, decl, in_code);
	  for (octx = ctx->outer_context; octx; octx = octx->outer_context)
	    {
	      splay_tree_node n2;

	      if ((octx->region_type & (ORT_TARGET_DATA | ORT_TARGET)) != 0)
		continue;
	      n2 = splay_tree_lookup (octx->variables, (splay_tree_key) decl);
	      if (n2 && (n2->value & GOVD_DATA_SHARE_CLASS) != GOVD_SHARED)
		{
		  flags |= GOVD_FIRSTPRIVATE;
		  break;
		}
	      if ((octx->region_type & (ORT_PARALLEL | ORT_TEAMS)) != 0)
		break;
	    }
	  if (flags & GOVD_FIRSTPRIVATE)
	    break;
	  if (octx == NULL
	      && (TREE_CODE (decl) == PARM_DECL
		  || (!is_global_var (decl)
		      && DECL_CONTEXT (decl) == current_function_decl)))
	    {
	      flags |= GOVD_FIRSTPRIVATE;
	      break;
	    }
	  flags |= GOVD_SHARED;
	  break;
	default:
	  gcc_unreachable ();
	}

      if ((flags & GOVD_PRIVATE)
	  && lang_hooks.decls.omp_private_outer_ref (decl))
	flags |= GOVD_PRIVATE_OUTER_REF;

      omp_add_variable (ctx, decl, flags);

      shared = (flags & GOVD_SHARED) != 0;
      ret = lang_hooks.decls.omp_disregard_value_expr (decl, shared);
      goto do_outer;
    }

  if ((n->value & (GOVD_SEEN | GOVD_LOCAL)) == 0
      && (flags & (GOVD_SEEN | GOVD_LOCAL)) == GOVD_SEEN
      && DECL_SIZE (decl)
      && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
    {
      splay_tree_node n2;
      tree t = DECL_VALUE_EXPR (decl);
      gcc_assert (TREE_CODE (t) == INDIRECT_REF);
      t = TREE_OPERAND (t, 0);
      gcc_assert (DECL_P (t));
      n2 = splay_tree_lookup (ctx->variables, (splay_tree_key) t);
      n2->value |= GOVD_SEEN;
    }

  shared = ((flags | n->value) & GOVD_SHARED) != 0;
  ret = lang_hooks.decls.omp_disregard_value_expr (decl, shared);

  /* If nothing changed, there's nothing left to do.  */
  if ((n->value & flags) == flags)
    return ret;
  flags |= n->value;
  n->value = flags;

 do_outer:
  /* If the variable is private in the current context, then we don't
     need to propagate anything to an outer context.  */
  if ((flags & GOVD_PRIVATE) && !(flags & GOVD_PRIVATE_OUTER_REF))
    return ret;
  if (ctx->outer_context
      && omp_notice_variable (ctx->outer_context, decl, in_code))
    return true;
  return ret;
}

/* Verify that DECL is private within CTX.  If there's specific information
   to the contrary in the innermost scope, generate an error.  */

static bool
omp_is_private (struct gimplify_omp_ctx *ctx, tree decl, int simd)
{
  splay_tree_node n;

  n = splay_tree_lookup (ctx->variables, (splay_tree_key)decl);
  if (n != NULL)
    {
      if (n->value & GOVD_SHARED)
	{
	  if (ctx == gimplify_omp_ctxp)
	    {
	      if (simd)
		error ("iteration variable %qE is predetermined linear",
		       DECL_NAME (decl));
	      else
		error ("iteration variable %qE should be private",
		       DECL_NAME (decl));
	      n->value = GOVD_PRIVATE;
	      return true;
	    }
	  else
	    return false;
	}
      else if ((n->value & GOVD_EXPLICIT) != 0
	       && (ctx == gimplify_omp_ctxp
		   || (ctx->region_type == ORT_COMBINED_PARALLEL
		       && gimplify_omp_ctxp->outer_context == ctx)))
	{
	  if ((n->value & GOVD_FIRSTPRIVATE) != 0)
	    error ("iteration variable %qE should not be firstprivate",
		   DECL_NAME (decl));
	  else if ((n->value & GOVD_REDUCTION) != 0)
	    error ("iteration variable %qE should not be reduction",
		   DECL_NAME (decl));
	  else if (simd == 1 && (n->value & GOVD_LASTPRIVATE) != 0)
	    error ("iteration variable %qE should not be lastprivate",
		   DECL_NAME (decl));
	  else if (simd && (n->value & GOVD_PRIVATE) != 0)
	    error ("iteration variable %qE should not be private",
		   DECL_NAME (decl));
	  else if (simd == 2 && (n->value & GOVD_LINEAR) != 0)
	    error ("iteration variable %qE is predetermined linear",
		   DECL_NAME (decl));
	}
      return (ctx == gimplify_omp_ctxp
	      || (ctx->region_type == ORT_COMBINED_PARALLEL
		  && gimplify_omp_ctxp->outer_context == ctx));
    }

  if (ctx->region_type != ORT_WORKSHARE
      && ctx->region_type != ORT_SIMD)
    return false;
  else if (ctx->outer_context)
    return omp_is_private (ctx->outer_context, decl, simd);
  return false;
}

/* Return true if DECL is private within a parallel region
   that binds to the current construct's context or in parallel
   region's REDUCTION clause.  */

static bool
omp_check_private (struct gimplify_omp_ctx *ctx, tree decl, bool copyprivate)
{
  splay_tree_node n;

  do
    {
      ctx = ctx->outer_context;
      if (ctx == NULL)
	return !(is_global_var (decl)
		 /* References might be private, but might be shared too,
		    when checking for copyprivate, assume they might be
		    private, otherwise assume they might be shared.  */
		 || (!copyprivate
		     && lang_hooks.decls.omp_privatize_by_reference (decl)));

      if ((ctx->region_type & (ORT_TARGET | ORT_TARGET_DATA)) != 0)
	continue;

      n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
      if (n != NULL)
	return (n->value & GOVD_SHARED) == 0;
    }
  while (ctx->region_type == ORT_WORKSHARE
	 || ctx->region_type == ORT_SIMD);
  return false;
}

/* Scan the OpenMP clauses in *LIST_P, installing mappings into a new
   and previous omp contexts.  */

static void
gimplify_scan_omp_clauses (tree *list_p, gimple_seq *pre_p,
			   enum omp_region_type region_type)
{
  struct gimplify_omp_ctx *ctx, *outer_ctx;
  tree c;

  ctx = new_omp_context (region_type);
  outer_ctx = ctx->outer_context;

  while ((c = *list_p) != NULL)
    {
      bool remove = false;
      bool notice_outer = true;
      const char *check_non_private = NULL;
      unsigned int flags;
      tree decl;

      switch (OMP_CLAUSE_CODE (c))
	{
	case OMP_CLAUSE_PRIVATE:
	  flags = GOVD_PRIVATE | GOVD_EXPLICIT;
	  if (lang_hooks.decls.omp_private_outer_ref (OMP_CLAUSE_DECL (c)))
	    {
	      flags |= GOVD_PRIVATE_OUTER_REF;
	      OMP_CLAUSE_PRIVATE_OUTER_REF (c) = 1;
	    }
	  else
	    notice_outer = false;
	  goto do_add;
	case OMP_CLAUSE_SHARED:
	  flags = GOVD_SHARED | GOVD_EXPLICIT;
	  goto do_add;
	case OMP_CLAUSE_FIRSTPRIVATE:
	  flags = GOVD_FIRSTPRIVATE | GOVD_EXPLICIT;
	  check_non_private = "firstprivate";
	  goto do_add;
	case OMP_CLAUSE_LASTPRIVATE:
	  flags = GOVD_LASTPRIVATE | GOVD_SEEN | GOVD_EXPLICIT;
	  check_non_private = "lastprivate";
	  goto do_add;
	case OMP_CLAUSE_REDUCTION:
	  flags = GOVD_REDUCTION | GOVD_SEEN | GOVD_EXPLICIT;
	  check_non_private = "reduction";
	  goto do_add;
	case OMP_CLAUSE_LINEAR:
	  if (gimplify_expr (&OMP_CLAUSE_LINEAR_STEP (c), pre_p, NULL,
			     is_gimple_val, fb_rvalue) == GS_ERROR)
	    {
	      remove = true;
	      break;
	    }
	  flags = GOVD_LINEAR | GOVD_EXPLICIT;
	  goto do_add;

	case OMP_CLAUSE_MAP:
	  decl = OMP_CLAUSE_DECL (c);
	  if (error_operand_p (decl))
	    {
	      remove = true;
	      break;
	    }
	  if (OMP_CLAUSE_SIZE (c) == NULL_TREE)
	    OMP_CLAUSE_SIZE (c) = DECL_P (decl) ? DECL_SIZE_UNIT (decl)
				  : TYPE_SIZE_UNIT (TREE_TYPE (decl));
	  if (gimplify_expr (&OMP_CLAUSE_SIZE (c), pre_p,
			     NULL, is_gimple_val, fb_rvalue) == GS_ERROR)
	    {
	      remove = true;
	      break;
	    }
	  if (!DECL_P (decl))
	    {
	      if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p,
				 NULL, is_gimple_lvalue, fb_lvalue)
		  == GS_ERROR)
		{
		  remove = true;
		  break;
		}
	      break;
	    }
	  flags = GOVD_MAP | GOVD_EXPLICIT;
	  goto do_add;

	case OMP_CLAUSE_DEPEND:
	  if (TREE_CODE (OMP_CLAUSE_DECL (c)) == COMPOUND_EXPR)
	    {
	      gimplify_expr (&TREE_OPERAND (OMP_CLAUSE_DECL (c), 0), pre_p,
			     NULL, is_gimple_val, fb_rvalue);
	      OMP_CLAUSE_DECL (c) = TREE_OPERAND (OMP_CLAUSE_DECL (c), 1);
	    }
	  if (error_operand_p (OMP_CLAUSE_DECL (c)))
	    {
	      remove = true;
	      break;
	    }
	  OMP_CLAUSE_DECL (c) = build_fold_addr_expr (OMP_CLAUSE_DECL (c));
	  if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p, NULL,
			     is_gimple_val, fb_rvalue) == GS_ERROR)
	    {
	      remove = true;
	      break;
	    }
	  break;

	case OMP_CLAUSE_TO:
	case OMP_CLAUSE_FROM:
	  decl = OMP_CLAUSE_DECL (c);
	  if (error_operand_p (decl))
	    {
	      remove = true;
	      break;
	    }
	  if (OMP_CLAUSE_SIZE (c) == NULL_TREE)
	    OMP_CLAUSE_SIZE (c) = DECL_P (decl) ? DECL_SIZE_UNIT (decl)
				  : TYPE_SIZE_UNIT (TREE_TYPE (decl));
	  if (gimplify_expr (&OMP_CLAUSE_SIZE (c), pre_p,
			     NULL, is_gimple_val, fb_rvalue) == GS_ERROR)
	    {
	      remove = true;
	      break;
	    }
	  if (!DECL_P (decl))
	    {
	      if (gimplify_expr (&OMP_CLAUSE_DECL (c), pre_p,
				 NULL, is_gimple_lvalue, fb_lvalue)
		  == GS_ERROR)
		{
		  remove = true;
		  break;
		}
	      break;
	    }
	  goto do_notice;

	do_add:
	  decl = OMP_CLAUSE_DECL (c);
	  if (error_operand_p (decl))
	    {
	      remove = true;
	      break;
	    }
	  omp_add_variable (ctx, decl, flags);
	  if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_REDUCTION
	      && OMP_CLAUSE_REDUCTION_PLACEHOLDER (c))
	    {
	      omp_add_variable (ctx, OMP_CLAUSE_REDUCTION_PLACEHOLDER (c),
				GOVD_LOCAL | GOVD_SEEN);
	      gimplify_omp_ctxp = ctx;
	      push_gimplify_context ();

	      OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c) = NULL;
	      OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c) = NULL;

	      gimplify_and_add (OMP_CLAUSE_REDUCTION_INIT (c),
		  		&OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c));
	      pop_gimplify_context
		(gimple_seq_first_stmt (OMP_CLAUSE_REDUCTION_GIMPLE_INIT (c)));
	      push_gimplify_context ();
	      gimplify_and_add (OMP_CLAUSE_REDUCTION_MERGE (c),
		  		&OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c));
	      pop_gimplify_context
		(gimple_seq_first_stmt (OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (c)));
	      OMP_CLAUSE_REDUCTION_INIT (c) = NULL_TREE;
	      OMP_CLAUSE_REDUCTION_MERGE (c) = NULL_TREE;

	      gimplify_omp_ctxp = outer_ctx;
	    }
	  else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE
		   && OMP_CLAUSE_LASTPRIVATE_STMT (c))
	    {
	      gimplify_omp_ctxp = ctx;
	      push_gimplify_context ();
	      if (TREE_CODE (OMP_CLAUSE_LASTPRIVATE_STMT (c)) != BIND_EXPR)
		{
		  tree bind = build3 (BIND_EXPR, void_type_node, NULL,
				      NULL, NULL);
		  TREE_SIDE_EFFECTS (bind) = 1;
		  BIND_EXPR_BODY (bind) = OMP_CLAUSE_LASTPRIVATE_STMT (c);
		  OMP_CLAUSE_LASTPRIVATE_STMT (c) = bind;
		}
	      gimplify_and_add (OMP_CLAUSE_LASTPRIVATE_STMT (c),
				&OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c));
	      pop_gimplify_context
		(gimple_seq_first_stmt (OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c)));
	      OMP_CLAUSE_LASTPRIVATE_STMT (c) = NULL_TREE;

	      gimplify_omp_ctxp = outer_ctx;
	    }
	  else if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR
		   && OMP_CLAUSE_LINEAR_STMT (c))
	    {
	      gimplify_omp_ctxp = ctx;
	      push_gimplify_context ();
	      if (TREE_CODE (OMP_CLAUSE_LINEAR_STMT (c)) != BIND_EXPR)
		{
		  tree bind = build3 (BIND_EXPR, void_type_node, NULL,
				      NULL, NULL);
		  TREE_SIDE_EFFECTS (bind) = 1;
		  BIND_EXPR_BODY (bind) = OMP_CLAUSE_LINEAR_STMT (c);
		  OMP_CLAUSE_LINEAR_STMT (c) = bind;
		}
	      gimplify_and_add (OMP_CLAUSE_LINEAR_STMT (c),
				&OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c));
	      pop_gimplify_context
		(gimple_seq_first_stmt (OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c)));
	      OMP_CLAUSE_LINEAR_STMT (c) = NULL_TREE;

	      gimplify_omp_ctxp = outer_ctx;
	    }
	  if (notice_outer)
	    goto do_notice;
	  break;

	case OMP_CLAUSE_COPYIN:
	case OMP_CLAUSE_COPYPRIVATE:
	  decl = OMP_CLAUSE_DECL (c);
	  if (error_operand_p (decl))
	    {
	      remove = true;
	      break;
	    }
	  if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_COPYPRIVATE
	      && !remove
	      && !omp_check_private (ctx, decl, true))
	    {
	      remove = true;
	      if (is_global_var (decl))
		{
		  if (DECL_THREAD_LOCAL_P (decl))
		    remove = false;
		  else if (DECL_HAS_VALUE_EXPR_P (decl))
		    {
		      tree value = get_base_address (DECL_VALUE_EXPR (decl));

		      if (value
			  && DECL_P (value)
			  && DECL_THREAD_LOCAL_P (value))
			remove = false;
		    }
		}
	      if (remove)
		error_at (OMP_CLAUSE_LOCATION (c),
			  "copyprivate variable %qE is not threadprivate"
			  " or private in outer context", DECL_NAME (decl));
	    }
	do_notice:
	  if (outer_ctx)
	    omp_notice_variable (outer_ctx, decl, true);
	  if (check_non_private
	      && region_type == ORT_WORKSHARE
	      && omp_check_private (ctx, decl, false))
	    {
	      error ("%s variable %qE is private in outer context",
		     check_non_private, DECL_NAME (decl));
	      remove = true;
	    }
	  break;

	case OMP_CLAUSE_FINAL:
	case OMP_CLAUSE_IF:
	  OMP_CLAUSE_OPERAND (c, 0)
	    = gimple_boolify (OMP_CLAUSE_OPERAND (c, 0));
	  /* Fall through.  */

	case OMP_CLAUSE_SCHEDULE:
	case OMP_CLAUSE_NUM_THREADS:
	case OMP_CLAUSE_NUM_TEAMS:
	case OMP_CLAUSE_THREAD_LIMIT:
	case OMP_CLAUSE_DIST_SCHEDULE:
	case OMP_CLAUSE_DEVICE:
	  if (gimplify_expr (&OMP_CLAUSE_OPERAND (c, 0), pre_p, NULL,
			     is_gimple_val, fb_rvalue) == GS_ERROR)
	    remove = true;
	  break;

	case OMP_CLAUSE_NOWAIT:
	case OMP_CLAUSE_ORDERED:
	case OMP_CLAUSE_UNTIED:
	case OMP_CLAUSE_COLLAPSE:
	case OMP_CLAUSE_MERGEABLE:
	case OMP_CLAUSE_PROC_BIND:
	case OMP_CLAUSE_SAFELEN:
	  break;

	case OMP_CLAUSE_ALIGNED:
	  decl = OMP_CLAUSE_DECL (c);
	  if (error_operand_p (decl))
	    {
	      remove = true;
	      break;
	    }
	  if (gimplify_expr (&OMP_CLAUSE_ALIGNED_ALIGNMENT (c), pre_p, NULL,
			     is_gimple_val, fb_rvalue) == GS_ERROR)
	    {
	      remove = true;
	      break;
	    }
	  if (!is_global_var (decl)
	      && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE)
	    omp_add_variable (ctx, decl, GOVD_ALIGNED);
	  break;

	case OMP_CLAUSE_DEFAULT:
	  ctx->default_kind = OMP_CLAUSE_DEFAULT_KIND (c);
	  break;

	default:
	  gcc_unreachable ();
	}

      if (remove)
	*list_p = OMP_CLAUSE_CHAIN (c);
      else
	list_p = &OMP_CLAUSE_CHAIN (c);
    }

  gimplify_omp_ctxp = ctx;
}

struct gimplify_adjust_omp_clauses_data
{
  tree *list_p;
  gimple_seq *pre_p;
};

/* For all variables that were not actually used within the context,
   remove PRIVATE, SHARED, and FIRSTPRIVATE clauses.  */

static int
gimplify_adjust_omp_clauses_1 (splay_tree_node n, void *data)
{
  tree *list_p = ((struct gimplify_adjust_omp_clauses_data *) data)->list_p;
  gimple_seq *pre_p
    = ((struct gimplify_adjust_omp_clauses_data *) data)->pre_p;
  tree decl = (tree) n->key;
  unsigned flags = n->value;
  enum omp_clause_code code;
  tree clause;
  bool private_debug;

  if (flags & (GOVD_EXPLICIT | GOVD_LOCAL))
    return 0;
  if ((flags & GOVD_SEEN) == 0)
    return 0;
  if (flags & GOVD_DEBUG_PRIVATE)
    {
      gcc_assert ((flags & GOVD_DATA_SHARE_CLASS) == GOVD_PRIVATE);
      private_debug = true;
    }
  else if (flags & GOVD_MAP)
    private_debug = false;
  else
    private_debug
      = lang_hooks.decls.omp_private_debug_clause (decl,
						   !!(flags & GOVD_SHARED));
  if (private_debug)
    code = OMP_CLAUSE_PRIVATE;
  else if (flags & GOVD_MAP)
    code = OMP_CLAUSE_MAP;
  else if (flags & GOVD_SHARED)
    {
      if (is_global_var (decl))
	{
	  struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp->outer_context;
	  while (ctx != NULL)
	    {
	      splay_tree_node on
		= splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
	      if (on && (on->value & (GOVD_FIRSTPRIVATE | GOVD_LASTPRIVATE
				      | GOVD_PRIVATE | GOVD_REDUCTION
				      | GOVD_LINEAR | GOVD_MAP)) != 0)
		break;
	      ctx = ctx->outer_context;
	    }
	  if (ctx == NULL)
	    return 0;
	}
      code = OMP_CLAUSE_SHARED;
    }
  else if (flags & GOVD_PRIVATE)
    code = OMP_CLAUSE_PRIVATE;
  else if (flags & GOVD_FIRSTPRIVATE)
    code = OMP_CLAUSE_FIRSTPRIVATE;
  else if (flags & GOVD_LASTPRIVATE)
    code = OMP_CLAUSE_LASTPRIVATE;
  else if (flags & GOVD_ALIGNED)
    return 0;
  else
    gcc_unreachable ();

  clause = build_omp_clause (input_location, code);
  OMP_CLAUSE_DECL (clause) = decl;
  OMP_CLAUSE_CHAIN (clause) = *list_p;
  if (private_debug)
    OMP_CLAUSE_PRIVATE_DEBUG (clause) = 1;
  else if (code == OMP_CLAUSE_PRIVATE && (flags & GOVD_PRIVATE_OUTER_REF))
    OMP_CLAUSE_PRIVATE_OUTER_REF (clause) = 1;
  else if (code == OMP_CLAUSE_MAP)
    {
      OMP_CLAUSE_MAP_KIND (clause) = flags & GOVD_MAP_TO_ONLY
				     ? OMP_CLAUSE_MAP_TO
				     : OMP_CLAUSE_MAP_TOFROM;
      if (DECL_SIZE (decl)
	  && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
	{
	  tree decl2 = DECL_VALUE_EXPR (decl);
	  gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
	  decl2 = TREE_OPERAND (decl2, 0);
	  gcc_assert (DECL_P (decl2));
	  tree mem = build_simple_mem_ref (decl2);
	  OMP_CLAUSE_DECL (clause) = mem;
	  OMP_CLAUSE_SIZE (clause) = TYPE_SIZE_UNIT (TREE_TYPE (decl));
	  if (gimplify_omp_ctxp->outer_context)
	    {
	      struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp->outer_context;
	      omp_notice_variable (ctx, decl2, true);
	      omp_notice_variable (ctx, OMP_CLAUSE_SIZE (clause), true);
	    }
	  tree nc = build_omp_clause (OMP_CLAUSE_LOCATION (clause),
				      OMP_CLAUSE_MAP);
	  OMP_CLAUSE_DECL (nc) = decl;
	  OMP_CLAUSE_SIZE (nc) = size_zero_node;
	  OMP_CLAUSE_MAP_KIND (nc) = OMP_CLAUSE_MAP_POINTER;
	  OMP_CLAUSE_CHAIN (nc) = OMP_CLAUSE_CHAIN (clause);
	  OMP_CLAUSE_CHAIN (clause) = nc;
	}
      else
	OMP_CLAUSE_SIZE (clause) = DECL_SIZE_UNIT (decl);
    }
  if (code == OMP_CLAUSE_FIRSTPRIVATE && (flags & GOVD_LASTPRIVATE) != 0)
    {
      tree nc = build_omp_clause (input_location, OMP_CLAUSE_LASTPRIVATE);
      OMP_CLAUSE_DECL (nc) = decl;
      OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (nc) = 1;
      OMP_CLAUSE_CHAIN (nc) = *list_p;
      OMP_CLAUSE_CHAIN (clause) = nc;
      struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp;
      gimplify_omp_ctxp = ctx->outer_context;
      lang_hooks.decls.omp_finish_clause (nc, pre_p);
      gimplify_omp_ctxp = ctx;
    }
  *list_p = clause;
  struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp;
  gimplify_omp_ctxp = ctx->outer_context;
  lang_hooks.decls.omp_finish_clause (clause, pre_p);
  gimplify_omp_ctxp = ctx;
  return 0;
}

static void
gimplify_adjust_omp_clauses (gimple_seq *pre_p, tree *list_p)
{
  struct gimplify_omp_ctx *ctx = gimplify_omp_ctxp;
  tree c, decl;

  while ((c = *list_p) != NULL)
    {
      splay_tree_node n;
      bool remove = false;

      switch (OMP_CLAUSE_CODE (c))
	{
	case OMP_CLAUSE_PRIVATE:
	case OMP_CLAUSE_SHARED:
	case OMP_CLAUSE_FIRSTPRIVATE:
	case OMP_CLAUSE_LINEAR:
	  decl = OMP_CLAUSE_DECL (c);
	  n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
	  remove = !(n->value & GOVD_SEEN);
	  if (! remove)
	    {
	      bool shared = OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED;
	      if ((n->value & GOVD_DEBUG_PRIVATE)
		  || lang_hooks.decls.omp_private_debug_clause (decl, shared))
		{
		  gcc_assert ((n->value & GOVD_DEBUG_PRIVATE) == 0
			      || ((n->value & GOVD_DATA_SHARE_CLASS)
				  == GOVD_PRIVATE));
		  OMP_CLAUSE_SET_CODE (c, OMP_CLAUSE_PRIVATE);
		  OMP_CLAUSE_PRIVATE_DEBUG (c) = 1;
		}
	      if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR
		  && ctx->outer_context
		  && !(OMP_CLAUSE_LINEAR_NO_COPYIN (c)
		       && OMP_CLAUSE_LINEAR_NO_COPYOUT (c)))
		{
		  if (ctx->outer_context->combined_loop
		      && !OMP_CLAUSE_LINEAR_NO_COPYIN (c))
		    {
		      n = splay_tree_lookup (ctx->outer_context->variables,
					     (splay_tree_key) decl);
		      if (n == NULL
			  || (n->value & GOVD_DATA_SHARE_CLASS) == 0)
			{
			  int flags = GOVD_FIRSTPRIVATE;
			  /* #pragma omp distribute does not allow
			     lastprivate clause.  */
			  if (!ctx->outer_context->distribute)
			    flags |= GOVD_LASTPRIVATE;
			  if (n == NULL)
			    omp_add_variable (ctx->outer_context, decl,
					      flags | GOVD_SEEN);
			  else
			    n->value |= flags | GOVD_SEEN;
			}
		    }
		  else if (!is_global_var (decl))
		    omp_notice_variable (ctx->outer_context, decl, true);
		}
	    }
	  break;

	case OMP_CLAUSE_LASTPRIVATE:
	  /* Make sure OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE is set to
	     accurately reflect the presence of a FIRSTPRIVATE clause.  */
	  decl = OMP_CLAUSE_DECL (c);
	  n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
	  OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE (c)
	    = (n->value & GOVD_FIRSTPRIVATE) != 0;
	  break;

	case OMP_CLAUSE_ALIGNED:
	  decl = OMP_CLAUSE_DECL (c);
	  if (!is_global_var (decl))
	    {
	      n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
	      remove = n == NULL || !(n->value & GOVD_SEEN);
	      if (!remove && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE)
		{
		  struct gimplify_omp_ctx *octx;
		  if (n != NULL
		      && (n->value & (GOVD_DATA_SHARE_CLASS
				      & ~GOVD_FIRSTPRIVATE)))
		    remove = true;
		  else
		    for (octx = ctx->outer_context; octx;
			 octx = octx->outer_context)
		      {
			n = splay_tree_lookup (octx->variables,
					       (splay_tree_key) decl);
			if (n == NULL)
			  continue;
			if (n->value & GOVD_LOCAL)
			  break;
			/* We have to avoid assigning a shared variable
			   to itself when trying to add
			   __builtin_assume_aligned.  */
			if (n->value & GOVD_SHARED)
			  {
			    remove = true;
			    break;
			  }
		      }
		}
	    }
	  else if (TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
	    {
	      n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
	      if (n != NULL && (n->value & GOVD_DATA_SHARE_CLASS) != 0)
		remove = true;
	    }
	  break;

	case OMP_CLAUSE_MAP:
	  decl = OMP_CLAUSE_DECL (c);
	  if (!DECL_P (decl))
	    break;
	  n = splay_tree_lookup (ctx->variables, (splay_tree_key) decl);
	  if (ctx->region_type == ORT_TARGET && !(n->value & GOVD_SEEN))
	    remove = true;
	  else if (DECL_SIZE (decl)
		   && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST
		   && OMP_CLAUSE_MAP_KIND (c) != OMP_CLAUSE_MAP_POINTER)
	    {
	      tree decl2 = DECL_VALUE_EXPR (decl);
	      gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
	      decl2 = TREE_OPERAND (decl2, 0);
	      gcc_assert (DECL_P (decl2));
	      tree mem = build_simple_mem_ref (decl2);
	      OMP_CLAUSE_DECL (c) = mem;
	      OMP_CLAUSE_SIZE (c) = TYPE_SIZE_UNIT (TREE_TYPE (decl));
	      if (ctx->outer_context)
		{
		  omp_notice_variable (ctx->outer_context, decl2, true);
		  omp_notice_variable (ctx->outer_context,
				       OMP_CLAUSE_SIZE (c), true);
		}
	      tree nc = build_omp_clause (OMP_CLAUSE_LOCATION (c),
					  OMP_CLAUSE_MAP);
	      OMP_CLAUSE_DECL (nc) = decl;
	      OMP_CLAUSE_SIZE (nc) = size_zero_node;
	      OMP_CLAUSE_MAP_KIND (nc) = OMP_CLAUSE_MAP_POINTER;
	      OMP_CLAUSE_CHAIN (nc) = OMP_CLAUSE_CHAIN (c);
	      OMP_CLAUSE_CHAIN (c) = nc;
	      c = nc;
	    }
	  else if (OMP_CLAUSE_SIZE (c) == NULL_TREE)
	    OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl);
	  break;

	case OMP_CLAUSE_TO:
	case OMP_CLAUSE_FROM:
	  decl = OMP_CLAUSE_DECL (c);
	  if (!DECL_P (decl))
	    break;
	  if (DECL_SIZE (decl)
	      && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST)
	    {
	      tree decl2 = DECL_VALUE_EXPR (decl);
	      gcc_assert (TREE_CODE (decl2) == INDIRECT_REF);
	      decl2 = TREE_OPERAND (decl2, 0);
	      gcc_assert (DECL_P (decl2));
	      tree mem = build_simple_mem_ref (decl2);
	      OMP_CLAUSE_DECL (c) = mem;
	      OMP_CLAUSE_SIZE (c) = TYPE_SIZE_UNIT (TREE_TYPE (decl));
	      if (ctx->outer_context)
		{
		  omp_notice_variable (ctx->outer_context, decl2, true);
		  omp_notice_variable (ctx->outer_context,
				       OMP_CLAUSE_SIZE (c), true);
		}
	    }
	  else if (OMP_CLAUSE_SIZE (c) == NULL_TREE)
	    OMP_CLAUSE_SIZE (c) = DECL_SIZE_UNIT (decl);
	  break;

	case OMP_CLAUSE_REDUCTION:
	case OMP_CLAUSE_COPYIN:
	case OMP_CLAUSE_COPYPRIVATE:
	case OMP_CLAUSE_IF:
	case OMP_CLAUSE_NUM_THREADS:
	case OMP_CLAUSE_NUM_TEAMS:
	case OMP_CLAUSE_THREAD_LIMIT:
	case OMP_CLAUSE_DIST_SCHEDULE:
	case OMP_CLAUSE_DEVICE:
	case OMP_CLAUSE_SCHEDULE:
	case OMP_CLAUSE_NOWAIT:
	case OMP_CLAUSE_ORDERED:
	case OMP_CLAUSE_DEFAULT:
	case OMP_CLAUSE_UNTIED:
	case OMP_CLAUSE_COLLAPSE:
	case OMP_CLAUSE_FINAL:
	case OMP_CLAUSE_MERGEABLE:
	case OMP_CLAUSE_PROC_BIND:
	case OMP_CLAUSE_SAFELEN:
	case OMP_CLAUSE_DEPEND:
	  break;

	default:
	  gcc_unreachable ();
	}

      if (remove)
	*list_p = OMP_CLAUSE_CHAIN (c);
      else
	list_p = &OMP_CLAUSE_CHAIN (c);
    }

  /* Add in any implicit data sharing.  */
  struct gimplify_adjust_omp_clauses_data data;
  data.list_p = list_p;
  data.pre_p = pre_p;
  splay_tree_foreach (ctx->variables, gimplify_adjust_omp_clauses_1, &data);

  gimplify_omp_ctxp = ctx->outer_context;
  delete_omp_context (ctx);
}

/* Gimplify the contents of an OMP_PARALLEL statement.  This involves
   gimplification of the body, as well as scanning the body for used
   variables.  We need to do this scan now, because variable-sized
   decls will be decomposed during gimplification.  */

static void
gimplify_omp_parallel (tree *expr_p, gimple_seq *pre_p)
{
  tree expr = *expr_p;
  gimple g;
  gimple_seq body = NULL;

  gimplify_scan_omp_clauses (&OMP_PARALLEL_CLAUSES (expr), pre_p,
			     OMP_PARALLEL_COMBINED (expr)
			     ? ORT_COMBINED_PARALLEL
			     : ORT_PARALLEL);

  push_gimplify_context ();

  g = gimplify_and_return_first (OMP_PARALLEL_BODY (expr), &body);
  if (gimple_code (g) == GIMPLE_BIND)
    pop_gimplify_context (g);
  else
    pop_gimplify_context (NULL);

  gimplify_adjust_omp_clauses (pre_p, &OMP_PARALLEL_CLAUSES (expr));

  g = gimple_build_omp_parallel (body,
				 OMP_PARALLEL_CLAUSES (expr),
				 NULL_TREE, NULL_TREE);
  if (OMP_PARALLEL_COMBINED (expr))
    gimple_omp_set_subcode (g, GF_OMP_PARALLEL_COMBINED);
  gimplify_seq_add_stmt (pre_p, g);
  *expr_p = NULL_TREE;
}

/* Gimplify the contents of an OMP_TASK statement.  This involves
   gimplification of the body, as well as scanning the body for used
   variables.  We need to do this scan now, because variable-sized
   decls will be decomposed during gimplification.  */

static void
gimplify_omp_task (tree *expr_p, gimple_seq *pre_p)
{
  tree expr = *expr_p;
  gimple g;
  gimple_seq body = NULL;

  gimplify_scan_omp_clauses (&OMP_TASK_CLAUSES (expr), pre_p,
			     find_omp_clause (OMP_TASK_CLAUSES (expr),
					      OMP_CLAUSE_UNTIED)
			     ? ORT_UNTIED_TASK : ORT_TASK);

  push_gimplify_context ();

  g = gimplify_and_return_first (OMP_TASK_BODY (expr), &body);
  if (gimple_code (g) == GIMPLE_BIND)
    pop_gimplify_context (g);
  else
    pop_gimplify_context (NULL);

  gimplify_adjust_omp_clauses (pre_p, &OMP_TASK_CLAUSES (expr));

  g = gimple_build_omp_task (body,
			     OMP_TASK_CLAUSES (expr),
			     NULL_TREE, NULL_TREE,
			     NULL_TREE, NULL_TREE, NULL_TREE);
  gimplify_seq_add_stmt (pre_p, g);
  *expr_p = NULL_TREE;
}

/* Helper function of gimplify_omp_for, find OMP_FOR resp. OMP_SIMD
   with non-NULL OMP_FOR_INIT.  */

static tree
find_combined_omp_for (tree *tp, int *walk_subtrees, void *)
{
  *walk_subtrees = 0;
  switch (TREE_CODE (*tp))
    {
    case OMP_FOR:
      *walk_subtrees = 1;
      /* FALLTHRU */
    case OMP_SIMD:
      if (OMP_FOR_INIT (*tp) != NULL_TREE)
	return *tp;
      break;
    case BIND_EXPR:
    case STATEMENT_LIST:
    case OMP_PARALLEL:
      *walk_subtrees = 1;
      break;
    default:
      break;
    }
  return NULL_TREE;
}

/* Gimplify the gross structure of an OMP_FOR statement.  */

static enum gimplify_status
gimplify_omp_for (tree *expr_p, gimple_seq *pre_p)
{
  tree for_stmt, orig_for_stmt, decl, var, t;
  enum gimplify_status ret = GS_ALL_DONE;
  enum gimplify_status tret;
  gimple gfor;
  gimple_seq for_body, for_pre_body;
  int i;
  bool simd;
  bitmap has_decl_expr = NULL;

  orig_for_stmt = for_stmt = *expr_p;

  simd = (TREE_CODE (for_stmt) == OMP_SIMD
	  || TREE_CODE (for_stmt) == CILK_SIMD);
  gimplify_scan_omp_clauses (&OMP_FOR_CLAUSES (for_stmt), pre_p,
			     simd ? ORT_SIMD : ORT_WORKSHARE);
  if (TREE_CODE (for_stmt) == OMP_DISTRIBUTE)
    gimplify_omp_ctxp->distribute = true;

  /* Handle OMP_FOR_INIT.  */
  for_pre_body = NULL;
  if (simd && OMP_FOR_PRE_BODY (for_stmt))
    {
      has_decl_expr = BITMAP_ALLOC (NULL);
      if (TREE_CODE (OMP_FOR_PRE_BODY (for_stmt)) == DECL_EXPR
	  && TREE_CODE (DECL_EXPR_DECL (OMP_FOR_PRE_BODY (for_stmt)))
	     == VAR_DECL)
	{
	  t = OMP_FOR_PRE_BODY (for_stmt);
	  bitmap_set_bit (has_decl_expr, DECL_UID (DECL_EXPR_DECL (t)));
	}
      else if (TREE_CODE (OMP_FOR_PRE_BODY (for_stmt)) == STATEMENT_LIST)
	{
	  tree_stmt_iterator si;
	  for (si = tsi_start (OMP_FOR_PRE_BODY (for_stmt)); !tsi_end_p (si);
	       tsi_next (&si))
	    {
	      t = tsi_stmt (si);
	      if (TREE_CODE (t) == DECL_EXPR
		  && TREE_CODE (DECL_EXPR_DECL (t)) == VAR_DECL)
		bitmap_set_bit (has_decl_expr, DECL_UID (DECL_EXPR_DECL (t)));
	    }
	}
    }
  gimplify_and_add (OMP_FOR_PRE_BODY (for_stmt), &for_pre_body);
  OMP_FOR_PRE_BODY (for_stmt) = NULL_TREE;

  if (OMP_FOR_INIT (for_stmt) == NULL_TREE)
    {
      for_stmt = walk_tree (&OMP_FOR_BODY (for_stmt), find_combined_omp_for,
			    NULL, NULL);
      gcc_assert (for_stmt != NULL_TREE);
      gimplify_omp_ctxp->combined_loop = true;
    }

  for_body = NULL;
  gcc_assert (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt))
	      == TREE_VEC_LENGTH (OMP_FOR_COND (for_stmt)));
  gcc_assert (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt))
	      == TREE_VEC_LENGTH (OMP_FOR_INCR (for_stmt)));
  for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++)
    {
      t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i);
      gcc_assert (TREE_CODE (t) == MODIFY_EXPR);
      decl = TREE_OPERAND (t, 0);
      gcc_assert (DECL_P (decl));
      gcc_assert (INTEGRAL_TYPE_P (TREE_TYPE (decl))
		  || POINTER_TYPE_P (TREE_TYPE (decl)));

      /* Make sure the iteration variable is private.  */
      tree c = NULL_TREE;
      tree c2 = NULL_TREE;
      if (orig_for_stmt != for_stmt)
	/* Do this only on innermost construct for combined ones.  */;
      else if (simd)
	{
	  splay_tree_node n = splay_tree_lookup (gimplify_omp_ctxp->variables,
						 (splay_tree_key)decl);
	  omp_is_private (gimplify_omp_ctxp, decl,
			  1 + (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt))
			       != 1));
	  if (n != NULL && (n->value & GOVD_DATA_SHARE_CLASS) != 0)
	    omp_notice_variable (gimplify_omp_ctxp, decl, true);
	  else if (TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == 1)
	    {
	      c = build_omp_clause (input_location, OMP_CLAUSE_LINEAR);
	      OMP_CLAUSE_LINEAR_NO_COPYIN (c) = 1;
	      if (has_decl_expr
		  && bitmap_bit_p (has_decl_expr, DECL_UID (decl)))
		OMP_CLAUSE_LINEAR_NO_COPYOUT (c) = 1;
	      OMP_CLAUSE_DECL (c) = decl;
	      OMP_CLAUSE_CHAIN (c) = OMP_FOR_CLAUSES (for_stmt);
	      OMP_FOR_CLAUSES (for_stmt) = c;
	      omp_add_variable (gimplify_omp_ctxp, decl,
				GOVD_LINEAR | GOVD_EXPLICIT | GOVD_SEEN);
	    }
	  else
	    {
	      bool lastprivate
		= (!has_decl_expr
		   || !bitmap_bit_p (has_decl_expr, DECL_UID (decl)));
	      if (lastprivate
		  && gimplify_omp_ctxp->outer_context
		  && gimplify_omp_ctxp->outer_context->region_type
		     == ORT_WORKSHARE
		  && gimplify_omp_ctxp->outer_context->combined_loop
		  && !gimplify_omp_ctxp->outer_context->distribute)
		{
		  struct gimplify_omp_ctx *outer
		    = gimplify_omp_ctxp->outer_context;
		  n = splay_tree_lookup (outer->variables,
					 (splay_tree_key) decl);
		  if (n != NULL
		      && (n->value & GOVD_DATA_SHARE_CLASS) == GOVD_LOCAL)
		    lastprivate = false;
		  else if (omp_check_private (outer, decl, false))
		    error ("lastprivate variable %qE is private in outer "
			   "context", DECL_NAME (decl));
		  else
		    {
		      omp_add_variable (outer, decl,
					GOVD_LASTPRIVATE | GOVD_SEEN);
		      if (outer->outer_context)
			omp_notice_variable (outer->outer_context, decl, true);
		    }
		}
	      c = build_omp_clause (input_location,
				    lastprivate ? OMP_CLAUSE_LASTPRIVATE
						: OMP_CLAUSE_PRIVATE);
	      OMP_CLAUSE_DECL (c) = decl;
	      OMP_CLAUSE_CHAIN (c) = OMP_FOR_CLAUSES (for_stmt);
	      OMP_FOR_CLAUSES (for_stmt) = c;
	      omp_add_variable (gimplify_omp_ctxp, decl,
				(lastprivate ? GOVD_LASTPRIVATE : GOVD_PRIVATE)
				| GOVD_EXPLICIT | GOVD_SEEN);
	      c = NULL_TREE;
	    }
	}
      else if (omp_is_private (gimplify_omp_ctxp, decl, 0))
	omp_notice_variable (gimplify_omp_ctxp, decl, true);
      else
	omp_add_variable (gimplify_omp_ctxp, decl, GOVD_PRIVATE | GOVD_SEEN);

      /* If DECL is not a gimple register, create a temporary variable to act
	 as an iteration counter.  This is valid, since DECL cannot be
	 modified in the body of the loop.  Similarly for any iteration vars
	 in simd with collapse > 1 where the iterator vars must be
	 lastprivate.  */
      if (orig_for_stmt != for_stmt)
	var = decl;
      else if (!is_gimple_reg (decl)
	       || (simd && TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) > 1))
	{
	  var = create_tmp_var (TREE_TYPE (decl), get_name (decl));
	  TREE_OPERAND (t, 0) = var;

	  gimplify_seq_add_stmt (&for_body, gimple_build_assign (decl, var));

	  if (simd && TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) == 1)
	    {
	      c2 = build_omp_clause (input_location, OMP_CLAUSE_LINEAR);
	      OMP_CLAUSE_LINEAR_NO_COPYIN (c2) = 1;
	      OMP_CLAUSE_LINEAR_NO_COPYOUT (c2) = 1;
	      OMP_CLAUSE_DECL (c2) = var;
	      OMP_CLAUSE_CHAIN (c2) = OMP_FOR_CLAUSES (for_stmt);
	      OMP_FOR_CLAUSES (for_stmt) = c2;
	      omp_add_variable (gimplify_omp_ctxp, var,
				GOVD_LINEAR | GOVD_EXPLICIT | GOVD_SEEN);
	      if (c == NULL_TREE)
		{
		  c = c2;
		  c2 = NULL_TREE;
		}
	    }
	  else
	    omp_add_variable (gimplify_omp_ctxp, var,
			      GOVD_PRIVATE | GOVD_SEEN);
	}
      else
	var = decl;

      tret = gimplify_expr (&TREE_OPERAND (t, 1), &for_pre_body, NULL,
			    is_gimple_val, fb_rvalue);
      ret = MIN (ret, tret);
      if (ret == GS_ERROR)
	return ret;

      /* Handle OMP_FOR_COND.  */
      t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), i);
      gcc_assert (COMPARISON_CLASS_P (t));
      gcc_assert (TREE_OPERAND (t, 0) == decl);

      tret = gimplify_expr (&TREE_OPERAND (t, 1), &for_pre_body, NULL,
			    is_gimple_val, fb_rvalue);
      ret = MIN (ret, tret);

      /* Handle OMP_FOR_INCR.  */
      t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i);
      switch (TREE_CODE (t))
	{
	case PREINCREMENT_EXPR:
	case POSTINCREMENT_EXPR:
	  {
	    tree decl = TREE_OPERAND (t, 0);
	    /* c_omp_for_incr_canonicalize_ptr() should have been
	       called to massage things appropriately.  */
	    gcc_assert (!POINTER_TYPE_P (TREE_TYPE (decl)));

	    if (orig_for_stmt != for_stmt)
	      break;
	    t = build_int_cst (TREE_TYPE (decl), 1);
	    if (c)
	      OMP_CLAUSE_LINEAR_STEP (c) = t;
	    t = build2 (PLUS_EXPR, TREE_TYPE (decl), var, t);
	    t = build2 (MODIFY_EXPR, TREE_TYPE (var), var, t);
	    TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i) = t;
	    break;
	  }

	case PREDECREMENT_EXPR:
	case POSTDECREMENT_EXPR:
	  /* c_omp_for_incr_canonicalize_ptr() should have been
	     called to massage things appropriately.  */
	  gcc_assert (!POINTER_TYPE_P (TREE_TYPE (decl)));
	  if (orig_for_stmt != for_stmt)
	    break;
	  t = build_int_cst (TREE_TYPE (decl), -1);
	  if (c)
	    OMP_CLAUSE_LINEAR_STEP (c) = t;
	  t = build2 (PLUS_EXPR, TREE_TYPE (decl), var, t);
	  t = build2 (MODIFY_EXPR, TREE_TYPE (var), var, t);
	  TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i) = t;
	  break;

	case MODIFY_EXPR:
	  gcc_assert (TREE_OPERAND (t, 0) == decl);
	  TREE_OPERAND (t, 0) = var;

	  t = TREE_OPERAND (t, 1);
	  switch (TREE_CODE (t))
	    {
	    case PLUS_EXPR:
	      if (TREE_OPERAND (t, 1) == decl)
		{
		  TREE_OPERAND (t, 1) = TREE_OPERAND (t, 0);
		  TREE_OPERAND (t, 0) = var;
		  break;
		}

	      /* Fallthru.  */
	    case MINUS_EXPR:
	    case POINTER_PLUS_EXPR:
	      gcc_assert (TREE_OPERAND (t, 0) == decl);
	      TREE_OPERAND (t, 0) = var;
	      break;
	    default:
	      gcc_unreachable ();
	    }

	  tret = gimplify_expr (&TREE_OPERAND (t, 1), &for_pre_body, NULL,
				is_gimple_val, fb_rvalue);
	  ret = MIN (ret, tret);
	  if (c)
	    {
	      tree step = TREE_OPERAND (t, 1);
	      tree stept = TREE_TYPE (decl);
	      if (POINTER_TYPE_P (stept))
		stept = sizetype;
	      step = fold_convert (stept, step);
	      if (TREE_CODE (t) == MINUS_EXPR)
		step = fold_build1 (NEGATE_EXPR, stept, step);
	      OMP_CLAUSE_LINEAR_STEP (c) = step;
	      if (step != TREE_OPERAND (t, 1))
		{
		  tret = gimplify_expr (&OMP_CLAUSE_LINEAR_STEP (c),
					&for_pre_body, NULL,
					is_gimple_val, fb_rvalue);
		  ret = MIN (ret, tret);
		}
	    }
	  break;

	default:
	  gcc_unreachable ();
	}

      if (c2)
	{
	  gcc_assert (c);
	  OMP_CLAUSE_LINEAR_STEP (c2) = OMP_CLAUSE_LINEAR_STEP (c);
	}

      if ((var != decl || TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)) > 1)
	  && orig_for_stmt == for_stmt)
	{
	  for (c = OMP_FOR_CLAUSES (for_stmt); c ; c = OMP_CLAUSE_CHAIN (c))
	    if (((OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE
		  && OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c) == NULL)
		 || (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LINEAR
		     && !OMP_CLAUSE_LINEAR_NO_COPYOUT (c)
		     && OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c) == NULL))
		&& OMP_CLAUSE_DECL (c) == decl)
	      {
		t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i);
		gcc_assert (TREE_CODE (t) == MODIFY_EXPR);
		gcc_assert (TREE_OPERAND (t, 0) == var);
		t = TREE_OPERAND (t, 1);
		gcc_assert (TREE_CODE (t) == PLUS_EXPR
			    || TREE_CODE (t) == MINUS_EXPR
			    || TREE_CODE (t) == POINTER_PLUS_EXPR);
		gcc_assert (TREE_OPERAND (t, 0) == var);
		t = build2 (TREE_CODE (t), TREE_TYPE (decl), decl,
			    TREE_OPERAND (t, 1));
		gimple_seq *seq;
		if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE)
		  seq = &OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (c);
		else
		  seq = &OMP_CLAUSE_LINEAR_GIMPLE_SEQ (c);
		gimplify_assign (decl, t, seq);
	    }
	}
    }

  BITMAP_FREE (has_decl_expr);

  gimplify_and_add (OMP_FOR_BODY (orig_for_stmt), &for_body);

  if (orig_for_stmt != for_stmt)
    for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++)
      {
	t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i);
	decl = TREE_OPERAND (t, 0);
	var = create_tmp_var (TREE_TYPE (decl), get_name (decl));
	omp_add_variable (gimplify_omp_ctxp, var, GOVD_PRIVATE | GOVD_SEEN);
	TREE_OPERAND (t, 0) = var;
	t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i);
	TREE_OPERAND (t, 1) = copy_node (TREE_OPERAND (t, 1));
	TREE_OPERAND (TREE_OPERAND (t, 1), 0) = var;
      }

  gimplify_adjust_omp_clauses (pre_p, &OMP_FOR_CLAUSES (orig_for_stmt));

  int kind;
  switch (TREE_CODE (orig_for_stmt))
    {
    case OMP_FOR: kind = GF_OMP_FOR_KIND_FOR; break;
    case OMP_SIMD: kind = GF_OMP_FOR_KIND_SIMD; break;
    case CILK_SIMD: kind = GF_OMP_FOR_KIND_CILKSIMD; break;
    case OMP_DISTRIBUTE: kind = GF_OMP_FOR_KIND_DISTRIBUTE; break;
    default:
      gcc_unreachable ();
    }
  gfor = gimple_build_omp_for (for_body, kind, OMP_FOR_CLAUSES (orig_for_stmt),
			       TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)),
			       for_pre_body);
  if (orig_for_stmt != for_stmt)
    gimple_omp_for_set_combined_p (gfor, true);
  if (gimplify_omp_ctxp
      && (gimplify_omp_ctxp->combined_loop
	  || (gimplify_omp_ctxp->region_type == ORT_COMBINED_PARALLEL
	      && gimplify_omp_ctxp->outer_context
	      && gimplify_omp_ctxp->outer_context->combined_loop)))
    {
      gimple_omp_for_set_combined_into_p (gfor, true);
      if (gimplify_omp_ctxp->combined_loop)
	gcc_assert (TREE_CODE (orig_for_stmt) == OMP_SIMD);
      else
	gcc_assert (TREE_CODE (orig_for_stmt) == OMP_FOR);
    }

  for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INIT (for_stmt)); i++)
    {
      t = TREE_VEC_ELT (OMP_FOR_INIT (for_stmt), i);
      gimple_omp_for_set_index (gfor, i, TREE_OPERAND (t, 0));
      gimple_omp_for_set_initial (gfor, i, TREE_OPERAND (t, 1));
      t = TREE_VEC_ELT (OMP_FOR_COND (for_stmt), i);
      gimple_omp_for_set_cond (gfor, i, TREE_CODE (t));
      gimple_omp_for_set_final (gfor, i, TREE_OPERAND (t, 1));
      t = TREE_VEC_ELT (OMP_FOR_INCR (for_stmt), i);
      gimple_omp_for_set_incr (gfor, i, TREE_OPERAND (t, 1));
    }

  gimplify_seq_add_stmt (pre_p, gfor);
  if (ret != GS_ALL_DONE)
    return GS_ERROR;
  *expr_p = NULL_TREE;
  return GS_ALL_DONE;
}

/* Gimplify the gross structure of other OpenMP constructs.
   In particular, OMP_SECTIONS, OMP_SINGLE, OMP_TARGET, OMP_TARGET_DATA
   and OMP_TEAMS.  */

static void
gimplify_omp_workshare (tree *expr_p, gimple_seq *pre_p)
{
  tree expr = *expr_p;
  gimple stmt;
  gimple_seq body = NULL;
  enum omp_region_type ort = ORT_WORKSHARE;

  switch (TREE_CODE (expr))
    {
    case OMP_SECTIONS:
    case OMP_SINGLE:
      break;
    case OMP_TARGET:
      ort = ORT_TARGET;
      break;
    case OMP_TARGET_DATA:
      ort = ORT_TARGET_DATA;
      break;
    case OMP_TEAMS:
      ort = ORT_TEAMS;
      break;
    default:
      gcc_unreachable ();
    }
  gimplify_scan_omp_clauses (&OMP_CLAUSES (expr), pre_p, ort);
  if (ort == ORT_TARGET || ort == ORT_TARGET_DATA)
    {
      push_gimplify_context ();
      gimple g = gimplify_and_return_first (OMP_BODY (expr), &body);
      if (gimple_code (g) == GIMPLE_BIND)
	pop_gimplify_context (g);
      else
	pop_gimplify_context (NULL);
      if (ort == ORT_TARGET_DATA)
	{
	  gimple_seq cleanup = NULL;
	  tree fn = builtin_decl_explicit (BUILT_IN_GOMP_TARGET_END_DATA);
	  g = gimple_build_call (fn, 0);
	  gimple_seq_add_stmt (&cleanup, g);
	  g = gimple_build_try (body, cleanup, GIMPLE_TRY_FINALLY);
	  body = NULL;
	  gimple_seq_add_stmt (&body, g);
	}
    }
  else
    gimplify_and_add (OMP_BODY (expr), &body);
  gimplify_adjust_omp_clauses (pre_p, &OMP_CLAUSES (expr));

  switch (TREE_CODE (expr))
    {
    case OMP_SECTIONS:
      stmt = gimple_build_omp_sections (body, OMP_CLAUSES (expr));
      break;
    case OMP_SINGLE:
      stmt = gimple_build_omp_single (body, OMP_CLAUSES (expr));
      break;
    case OMP_TARGET:
      stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_REGION,
				      OMP_CLAUSES (expr));
      break;
    case OMP_TARGET_DATA:
      stmt = gimple_build_omp_target (body, GF_OMP_TARGET_KIND_DATA,
				      OMP_CLAUSES (expr));
      break;
    case OMP_TEAMS:
      stmt = gimple_build_omp_teams (body, OMP_CLAUSES (expr));
      break;
    default:
      gcc_unreachable ();
    }

  gimplify_seq_add_stmt (pre_p, stmt);
  *expr_p = NULL_TREE;
}

/* Gimplify the gross structure of OpenMP target update construct.  */

static void
gimplify_omp_target_update (tree *expr_p, gimple_seq *pre_p)
{
  tree expr = *expr_p;
  gimple stmt;

  gimplify_scan_omp_clauses (&OMP_TARGET_UPDATE_CLAUSES (expr), pre_p,
			     ORT_WORKSHARE);
  gimplify_adjust_omp_clauses (pre_p, &OMP_TARGET_UPDATE_CLAUSES (expr));
  stmt = gimple_build_omp_target (NULL, GF_OMP_TARGET_KIND_UPDATE,
				  OMP_TARGET_UPDATE_CLAUSES (expr));

  gimplify_seq_add_stmt (pre_p, stmt);
  *expr_p = NULL_TREE;
}

/* A subroutine of gimplify_omp_atomic.  The front end is supposed to have
   stabilized the lhs of the atomic operation as *ADDR.  Return true if
   EXPR is this stabilized form.  */

static bool
goa_lhs_expr_p (tree expr, tree addr)
{
  /* Also include casts to other type variants.  The C front end is fond
     of adding these for e.g. volatile variables.  This is like
     STRIP_TYPE_NOPS but includes the main variant lookup.  */
  STRIP_USELESS_TYPE_CONVERSION (expr);

  if (TREE_CODE (expr) == INDIRECT_REF)
    {
      expr = TREE_OPERAND (expr, 0);
      while (expr != addr
	     && (CONVERT_EXPR_P (expr)
		 || TREE_CODE (expr) == NON_LVALUE_EXPR)
	     && TREE_CODE (expr) == TREE_CODE (addr)
	     && types_compatible_p (TREE_TYPE (expr), TREE_TYPE (addr)))
	{
	  expr = TREE_OPERAND (expr, 0);
	  addr = TREE_OPERAND (addr, 0);
	}
      if (expr == addr)
	return true;
      return (TREE_CODE (addr) == ADDR_EXPR
	      && TREE_CODE (expr) == ADDR_EXPR
	      && TREE_OPERAND (addr, 0) == TREE_OPERAND (expr, 0));
    }
  if (TREE_CODE (addr) == ADDR_EXPR && expr == TREE_OPERAND (addr, 0))
    return true;
  return false;
}

/* Walk *EXPR_P and replace appearances of *LHS_ADDR with LHS_VAR.  If an
   expression does not involve the lhs, evaluate it into a temporary.
   Return 1 if the lhs appeared as a subexpression, 0 if it did not,
   or -1 if an error was encountered.  */

static int
goa_stabilize_expr (tree *expr_p, gimple_seq *pre_p, tree lhs_addr,
		    tree lhs_var)
{
  tree expr = *expr_p;
  int saw_lhs;

  if (goa_lhs_expr_p (expr, lhs_addr))
    {
      *expr_p = lhs_var;
      return 1;
    }
  if (is_gimple_val (expr))
    return 0;

  saw_lhs = 0;
  switch (TREE_CODE_CLASS (TREE_CODE (expr)))
    {
    case tcc_binary:
    case tcc_comparison:
      saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p, lhs_addr,
				     lhs_var);
    case tcc_unary:
      saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p, lhs_addr,
				     lhs_var);
      break;
    case tcc_expression:
      switch (TREE_CODE (expr))
	{
	case TRUTH_ANDIF_EXPR:
	case TRUTH_ORIF_EXPR:
	case TRUTH_AND_EXPR:
	case TRUTH_OR_EXPR:
	case TRUTH_XOR_EXPR:
	  saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 1), pre_p,
					 lhs_addr, lhs_var);
	case TRUTH_NOT_EXPR:
	  saw_lhs |= goa_stabilize_expr (&TREE_OPERAND (expr, 0), pre_p,
					 lhs_addr, lhs_var);
	  break;
	case COMPOUND_EXPR:
	  /* Break out any preevaluations from cp_build_modify_expr.  */
	  for (; TREE_CODE (expr) == COMPOUND_EXPR;
	       expr = TREE_OPERAND (expr, 1))
	    gimplify_stmt (&TREE_OPERAND (expr, 0), pre_p);
	  *expr_p = expr;
	  return goa_stabilize_expr (expr_p, pre_p, lhs_addr, lhs_var);
	default:
	  break;
	}
      break;
    default:
      break;
    }

  if (saw_lhs == 0)
    {
      enum gimplify_status gs;
      gs = gimplify_expr (expr_p, pre_p, NULL, is_gimple_val, fb_rvalue);
      if (gs != GS_ALL_DONE)
	saw_lhs = -1;
    }

  return saw_lhs;
}

/* Gimplify an OMP_ATOMIC statement.  */

static enum gimplify_status
gimplify_omp_atomic (tree *expr_p, gimple_seq *pre_p)
{
  tree addr = TREE_OPERAND (*expr_p, 0);
  tree rhs = TREE_CODE (*expr_p) == OMP_ATOMIC_READ
	     ? NULL : TREE_OPERAND (*expr_p, 1);
  tree type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (addr)));
  tree tmp_load;
  gimple loadstmt, storestmt;

  tmp_load = create_tmp_reg (type, NULL);
  if (rhs && goa_stabilize_expr (&rhs, pre_p, addr, tmp_load) < 0)
    return GS_ERROR;

  if (gimplify_expr (&addr, pre_p, NULL, is_gimple_val, fb_rvalue)
      != GS_ALL_DONE)
    return GS_ERROR;

  loadstmt = gimple_build_omp_atomic_load (tmp_load, addr);
  gimplify_seq_add_stmt (pre_p, loadstmt);
  if (rhs && gimplify_expr (&rhs, pre_p, NULL, is_gimple_val, fb_rvalue)
      != GS_ALL_DONE)
    return GS_ERROR;

  if (TREE_CODE (*expr_p) == OMP_ATOMIC_READ)
    rhs = tmp_load;
  storestmt = gimple_build_omp_atomic_store (rhs);
  gimplify_seq_add_stmt (pre_p, storestmt);
  if (OMP_ATOMIC_SEQ_CST (*expr_p))
    {
      gimple_omp_atomic_set_seq_cst (loadstmt);
      gimple_omp_atomic_set_seq_cst (storestmt);
    }
  switch (TREE_CODE (*expr_p))
    {
    case OMP_ATOMIC_READ:
    case OMP_ATOMIC_CAPTURE_OLD:
      *expr_p = tmp_load;
      gimple_omp_atomic_set_need_value (loadstmt);
      break;
    case OMP_ATOMIC_CAPTURE_NEW:
      *expr_p = rhs;
      gimple_omp_atomic_set_need_value (storestmt);
      break;
    default:
      *expr_p = NULL;
      break;
    }

  return GS_ALL_DONE;
}

/* Gimplify a TRANSACTION_EXPR.  This involves gimplification of the
   body, and adding some EH bits.  */

static enum gimplify_status
gimplify_transaction (tree *expr_p, gimple_seq *pre_p)
{
  tree expr = *expr_p, temp, tbody = TRANSACTION_EXPR_BODY (expr);
  gimple g;
  gimple_seq body = NULL;
  int subcode = 0;

  /* Wrap the transaction body in a BIND_EXPR so we have a context
     where to put decls for OpenMP.  */
  if (TREE_CODE (tbody) != BIND_EXPR)
    {
      tree bind = build3 (BIND_EXPR, void_type_node, NULL, tbody, NULL);
      TREE_SIDE_EFFECTS (bind) = 1;
      SET_EXPR_LOCATION (bind, EXPR_LOCATION (tbody));
      TRANSACTION_EXPR_BODY (expr) = bind;
    }

  push_gimplify_context ();
  temp = voidify_wrapper_expr (*expr_p, NULL);

  g = gimplify_and_return_first (TRANSACTION_EXPR_BODY (expr), &body);
  pop_gimplify_context (g);

  g = gimple_build_transaction (body, NULL);
  if (TRANSACTION_EXPR_OUTER (expr))
    subcode = GTMA_IS_OUTER;
  else if (TRANSACTION_EXPR_RELAXED (expr))
    subcode = GTMA_IS_RELAXED;
  gimple_transaction_set_subcode (g, subcode);

  gimplify_seq_add_stmt (pre_p, g);

  if (temp)
    {
      *expr_p = temp;
      return GS_OK;
    }

  *expr_p = NULL_TREE;
  return GS_ALL_DONE;
}

/* Convert the GENERIC expression tree *EXPR_P to GIMPLE.  If the
   expression produces a value to be used as an operand inside a GIMPLE
   statement, the value will be stored back in *EXPR_P.  This value will
   be a tree of class tcc_declaration, tcc_constant, tcc_reference or
   an SSA_NAME.  The corresponding sequence of GIMPLE statements is
   emitted in PRE_P and POST_P.

   Additionally, this process may overwrite parts of the input
   expression during gimplification.  Ideally, it should be
   possible to do non-destructive gimplification.

   EXPR_P points to the GENERIC expression to convert to GIMPLE.  If
      the expression needs to evaluate to a value to be used as
      an operand in a GIMPLE statement, this value will be stored in
      *EXPR_P on exit.  This happens when the caller specifies one
      of fb_lvalue or fb_rvalue fallback flags.

   PRE_P will contain the sequence of GIMPLE statements corresponding
       to the evaluation of EXPR and all the side-effects that must
       be executed before the main expression.  On exit, the last
       statement of PRE_P is the core statement being gimplified.  For
       instance, when gimplifying 'if (++a)' the last statement in
       PRE_P will be 'if (t.1)' where t.1 is the result of
       pre-incrementing 'a'.

   POST_P will contain the sequence of GIMPLE statements corresponding
       to the evaluation of all the side-effects that must be executed
       after the main expression.  If this is NULL, the post
       side-effects are stored at the end of PRE_P.

       The reason why the output is split in two is to handle post
       side-effects explicitly.  In some cases, an expression may have
       inner and outer post side-effects which need to be emitted in
       an order different from the one given by the recursive
       traversal.  For instance, for the expression (*p--)++ the post
       side-effects of '--' must actually occur *after* the post
       side-effects of '++'.  However, gimplification will first visit
       the inner expression, so if a separate POST sequence was not
       used, the resulting sequence would be:

       	    1	t.1 = *p
       	    2	p = p - 1
       	    3	t.2 = t.1 + 1
       	    4	*p = t.2

       However, the post-decrement operation in line #2 must not be
       evaluated until after the store to *p at line #4, so the
       correct sequence should be:

       	    1	t.1 = *p
       	    2	t.2 = t.1 + 1
       	    3	*p = t.2
       	    4	p = p - 1

       So, by specifying a separate post queue, it is possible
       to emit the post side-effects in the correct order.
       If POST_P is NULL, an internal queue will be used.  Before
       returning to the caller, the sequence POST_P is appended to
       the main output sequence PRE_P.

   GIMPLE_TEST_F points to a function that takes a tree T and
       returns nonzero if T is in the GIMPLE form requested by the
       caller.  The GIMPLE predicates are in gimple.c.

   FALLBACK tells the function what sort of a temporary we want if
       gimplification cannot produce an expression that complies with
       GIMPLE_TEST_F.

       fb_none means that no temporary should be generated
       fb_rvalue means that an rvalue is OK to generate
       fb_lvalue means that an lvalue is OK to generate
       fb_either means that either is OK, but an lvalue is preferable.
       fb_mayfail means that gimplification may fail (in which case
       GS_ERROR will be returned)

   The return value is either GS_ERROR or GS_ALL_DONE, since this
   function iterates until EXPR is completely gimplified or an error
   occurs.  */

enum gimplify_status
gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
	       bool (*gimple_test_f) (tree), fallback_t fallback)
{
  tree tmp;
  gimple_seq internal_pre = NULL;
  gimple_seq internal_post = NULL;
  tree save_expr;
  bool is_statement;
  location_t saved_location;
  enum gimplify_status ret;
  gimple_stmt_iterator pre_last_gsi, post_last_gsi;

  save_expr = *expr_p;
  if (save_expr == NULL_TREE)
    return GS_ALL_DONE;

  /* If we are gimplifying a top-level statement, PRE_P must be valid.  */
  is_statement = gimple_test_f == is_gimple_stmt;
  if (is_statement)
    gcc_assert (pre_p);

  /* Consistency checks.  */
  if (gimple_test_f == is_gimple_reg)
    gcc_assert (fallback & (fb_rvalue | fb_lvalue));
  else if (gimple_test_f == is_gimple_val
           || gimple_test_f == is_gimple_call_addr
           || gimple_test_f == is_gimple_condexpr
           || gimple_test_f == is_gimple_mem_rhs
           || gimple_test_f == is_gimple_mem_rhs_or_call
           || gimple_test_f == is_gimple_reg_rhs
           || gimple_test_f == is_gimple_reg_rhs_or_call
           || gimple_test_f == is_gimple_asm_val
	   || gimple_test_f == is_gimple_mem_ref_addr)
    gcc_assert (fallback & fb_rvalue);
  else if (gimple_test_f == is_gimple_min_lval
	   || gimple_test_f == is_gimple_lvalue)
    gcc_assert (fallback & fb_lvalue);
  else if (gimple_test_f == is_gimple_addressable)
    gcc_assert (fallback & fb_either);
  else if (gimple_test_f == is_gimple_stmt)
    gcc_assert (fallback == fb_none);
  else
    {
      /* We should have recognized the GIMPLE_TEST_F predicate to
	 know what kind of fallback to use in case a temporary is
	 needed to hold the value or address of *EXPR_P.  */
      gcc_unreachable ();
    }

  /* We used to check the predicate here and return immediately if it
     succeeds.  This is wrong; the design is for gimplification to be
     idempotent, and for the predicates to only test for valid forms, not
     whether they are fully simplified.  */
  if (pre_p == NULL)
    pre_p = &internal_pre;

  if (post_p == NULL)
    post_p = &internal_post;

  /* Remember the last statements added to PRE_P and POST_P.  Every
     new statement added by the gimplification helpers needs to be
     annotated with location information.  To centralize the
     responsibility, we remember the last statement that had been
     added to both queues before gimplifying *EXPR_P.  If
     gimplification produces new statements in PRE_P and POST_P, those
     statements will be annotated with the same location information
     as *EXPR_P.  */
  pre_last_gsi = gsi_last (*pre_p);
  post_last_gsi = gsi_last (*post_p);

  saved_location = input_location;
  if (save_expr != error_mark_node
      && EXPR_HAS_LOCATION (*expr_p))
    input_location = EXPR_LOCATION (*expr_p);

  /* Loop over the specific gimplifiers until the toplevel node
     remains the same.  */
  do
    {
      /* Strip away as many useless type conversions as possible
	 at the toplevel.  */
      STRIP_USELESS_TYPE_CONVERSION (*expr_p);

      /* Remember the expr.  */
      save_expr = *expr_p;

      /* Die, die, die, my darling.  */
      if (save_expr == error_mark_node
	  || (TREE_TYPE (save_expr)
	      && TREE_TYPE (save_expr) == error_mark_node))
	{
	  ret = GS_ERROR;
	  break;
	}

      /* Do any language-specific gimplification.  */
      ret = ((enum gimplify_status)
	     lang_hooks.gimplify_expr (expr_p, pre_p, post_p));
      if (ret == GS_OK)
	{
	  if (*expr_p == NULL_TREE)
	    break;
	  if (*expr_p != save_expr)
	    continue;
	}
      else if (ret != GS_UNHANDLED)
	break;

      /* Make sure that all the cases set 'ret' appropriately.  */
      ret = GS_UNHANDLED;
      switch (TREE_CODE (*expr_p))
	{
	  /* First deal with the special cases.  */

	case POSTINCREMENT_EXPR:
	case POSTDECREMENT_EXPR:
	case PREINCREMENT_EXPR:
	case PREDECREMENT_EXPR:
	  ret = gimplify_self_mod_expr (expr_p, pre_p, post_p,
					fallback != fb_none,
					TREE_TYPE (*expr_p));
	  break;

	case VIEW_CONVERT_EXPR:
	  if (is_gimple_reg_type (TREE_TYPE (*expr_p))
	      && is_gimple_reg_type (TREE_TYPE (TREE_OPERAND (*expr_p, 0))))
	    {
	      ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
				   post_p, is_gimple_val, fb_rvalue);
	      recalculate_side_effects (*expr_p);
	      break;
	    }
	  /* Fallthru.  */

	case ARRAY_REF:
	case ARRAY_RANGE_REF:
	case REALPART_EXPR:
	case IMAGPART_EXPR:
	case COMPONENT_REF:
	  ret = gimplify_compound_lval (expr_p, pre_p, post_p,
					fallback ? fallback : fb_rvalue);
	  break;

	case COND_EXPR:
	  ret = gimplify_cond_expr (expr_p, pre_p, fallback);

	  /* C99 code may assign to an array in a structure value of a
	     conditional expression, and this has undefined behavior
	     only on execution, so create a temporary if an lvalue is
	     required.  */
	  if (fallback == fb_lvalue)
	    {
	      *expr_p = get_initialized_tmp_var (*expr_p, pre_p, post_p);
	      mark_addressable (*expr_p);
	      ret = GS_OK;
	    }
	  break;

	case CALL_EXPR:
	  ret = gimplify_call_expr (expr_p, pre_p, fallback != fb_none);

	  /* C99 code may assign to an array in a structure returned
	     from a function, and this has undefined behavior only on
	     execution, so create a temporary if an lvalue is
	     required.  */
	  if (fallback == fb_lvalue)
	    {
	      *expr_p = get_initialized_tmp_var (*expr_p, pre_p, post_p);
	      mark_addressable (*expr_p);
	      ret = GS_OK;
	    }
	  break;

	case TREE_LIST:
	  gcc_unreachable ();

	case COMPOUND_EXPR:
	  ret = gimplify_compound_expr (expr_p, pre_p, fallback != fb_none);
	  break;

	case COMPOUND_LITERAL_EXPR:
	  ret = gimplify_compound_literal_expr (expr_p, pre_p,
						gimple_test_f, fallback);
	  break;

	case MODIFY_EXPR:
	case INIT_EXPR:
	  ret = gimplify_modify_expr (expr_p, pre_p, post_p,
				      fallback != fb_none);
	  break;

	case TRUTH_ANDIF_EXPR:
	case TRUTH_ORIF_EXPR:
	  {
	    /* Preserve the original type of the expression and the
	       source location of the outer expression.  */
	    tree org_type = TREE_TYPE (*expr_p);
	    *expr_p = gimple_boolify (*expr_p);
	    *expr_p = build3_loc (input_location, COND_EXPR,
				  org_type, *expr_p,
				  fold_convert_loc
				    (input_location,
				     org_type, boolean_true_node),
				  fold_convert_loc
				    (input_location,
				     org_type, boolean_false_node));
	    ret = GS_OK;
	    break;
	  }

	case TRUTH_NOT_EXPR:
	  {
	    tree type = TREE_TYPE (*expr_p);
	    /* The parsers are careful to generate TRUTH_NOT_EXPR
	       only with operands that are always zero or one.
	       We do not fold here but handle the only interesting case
	       manually, as fold may re-introduce the TRUTH_NOT_EXPR.  */
	    *expr_p = gimple_boolify (*expr_p);
	    if (TYPE_PRECISION (TREE_TYPE (*expr_p)) == 1)
	      *expr_p = build1_loc (input_location, BIT_NOT_EXPR,
				    TREE_TYPE (*expr_p),
				    TREE_OPERAND (*expr_p, 0));
	    else
	      *expr_p = build2_loc (input_location, BIT_XOR_EXPR,
				    TREE_TYPE (*expr_p),
				    TREE_OPERAND (*expr_p, 0),
				    build_int_cst (TREE_TYPE (*expr_p), 1));
	    if (!useless_type_conversion_p (type, TREE_TYPE (*expr_p)))
	      *expr_p = fold_convert_loc (input_location, type, *expr_p);
	    ret = GS_OK;
	    break;
	  }

	case ADDR_EXPR:
	  ret = gimplify_addr_expr (expr_p, pre_p, post_p);
	  break;

	case ANNOTATE_EXPR:
	  {
	    tree cond = TREE_OPERAND (*expr_p, 0);
	    tree id = TREE_OPERAND (*expr_p, 1);
	    tree type = TREE_TYPE (cond);
	    if (!INTEGRAL_TYPE_P (type))
	      {
		*expr_p = cond;
		ret = GS_OK;
		break;
	      }
	    tree tmp = create_tmp_var (type, NULL);
	    gimplify_arg (&cond, pre_p, EXPR_LOCATION (*expr_p));
	    gimple call = gimple_build_call_internal (IFN_ANNOTATE, 2,
						      cond, id);
	    gimple_call_set_lhs (call, tmp);
	    gimplify_seq_add_stmt (pre_p, call);
	    *expr_p = tmp;
	    ret = GS_ALL_DONE;
	    break;
	  }

	case VA_ARG_EXPR:
	  ret = gimplify_va_arg_expr (expr_p, pre_p, post_p);
	  break;

	CASE_CONVERT:
	  if (IS_EMPTY_STMT (*expr_p))
	    {
	      ret = GS_ALL_DONE;
	      break;
	    }

	  if (VOID_TYPE_P (TREE_TYPE (*expr_p))
	      || fallback == fb_none)
	    {
	      /* Just strip a conversion to void (or in void context) and
		 try again.  */
	      *expr_p = TREE_OPERAND (*expr_p, 0);
	      ret = GS_OK;
	      break;
	    }

	  ret = gimplify_conversion (expr_p);
	  if (ret == GS_ERROR)
	    break;
	  if (*expr_p != save_expr)
	    break;
	  /* FALLTHRU */

	case FIX_TRUNC_EXPR:
	  /* unary_expr: ... | '(' cast ')' val | ...  */
	  ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
			       is_gimple_val, fb_rvalue);
	  recalculate_side_effects (*expr_p);
	  break;

	case INDIRECT_REF:
	  {
	    bool volatilep = TREE_THIS_VOLATILE (*expr_p);
	    bool notrap = TREE_THIS_NOTRAP (*expr_p);
	    tree saved_ptr_type = TREE_TYPE (TREE_OPERAND (*expr_p, 0));

	    *expr_p = fold_indirect_ref_loc (input_location, *expr_p);
	    if (*expr_p != save_expr)
	      {
		ret = GS_OK;
		break;
	      }

	    ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
				 is_gimple_reg, fb_rvalue);
	    if (ret == GS_ERROR)
	      break;

	    recalculate_side_effects (*expr_p);
	    *expr_p = fold_build2_loc (input_location, MEM_REF,
				       TREE_TYPE (*expr_p),
				       TREE_OPERAND (*expr_p, 0),
				       build_int_cst (saved_ptr_type, 0));
	    TREE_THIS_VOLATILE (*expr_p) = volatilep;
	    TREE_THIS_NOTRAP (*expr_p) = notrap;
	    ret = GS_OK;
	    break;
	  }

	/* We arrive here through the various re-gimplifcation paths.  */
	case MEM_REF:
	  /* First try re-folding the whole thing.  */
	  tmp = fold_binary (MEM_REF, TREE_TYPE (*expr_p),
			     TREE_OPERAND (*expr_p, 0),
			     TREE_OPERAND (*expr_p, 1));
	  if (tmp)
	    {
	      *expr_p = tmp;
	      recalculate_side_effects (*expr_p);
	      ret = GS_OK;
	      break;
	    }
	  /* Avoid re-gimplifying the address operand if it is already
	     in suitable form.  Re-gimplifying would mark the address
	     operand addressable.  Always gimplify when not in SSA form
	     as we still may have to gimplify decls with value-exprs.  */
	  if (!gimplify_ctxp || !gimplify_ctxp->into_ssa
	      || !is_gimple_mem_ref_addr (TREE_OPERAND (*expr_p, 0)))
	    {
	      ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
				   is_gimple_mem_ref_addr, fb_rvalue);
	      if (ret == GS_ERROR)
		break;
	    }
	  recalculate_side_effects (*expr_p);
	  ret = GS_ALL_DONE;
	  break;

	/* Constants need not be gimplified.  */
	case INTEGER_CST:
	case REAL_CST:
	case FIXED_CST:
	case STRING_CST:
	case COMPLEX_CST:
	case VECTOR_CST:
	  /* Drop the overflow flag on constants, we do not want
	     that in the GIMPLE IL.  */
	  if (TREE_OVERFLOW_P (*expr_p))
	    *expr_p = drop_tree_overflow (*expr_p);
	  ret = GS_ALL_DONE;
	  break;

	case CONST_DECL:
	  /* If we require an lvalue, such as for ADDR_EXPR, retain the
	     CONST_DECL node.  Otherwise the decl is replaceable by its
	     value.  */
	  /* ??? Should be == fb_lvalue, but ADDR_EXPR passes fb_either.  */
	  if (fallback & fb_lvalue)
	    ret = GS_ALL_DONE;
	  else
	    {
	      *expr_p = DECL_INITIAL (*expr_p);
	      ret = GS_OK;
	    }
	  break;

	case DECL_EXPR:
	  ret = gimplify_decl_expr (expr_p, pre_p);
	  break;

	case BIND_EXPR:
	  ret = gimplify_bind_expr (expr_p, pre_p);
	  break;

	case LOOP_EXPR:
	  ret = gimplify_loop_expr (expr_p, pre_p);
	  break;

	case SWITCH_EXPR:
	  ret = gimplify_switch_expr (expr_p, pre_p);
	  break;

	case EXIT_EXPR:
	  ret = gimplify_exit_expr (expr_p);
	  break;

	case GOTO_EXPR:
	  /* If the target is not LABEL, then it is a computed jump
	     and the target needs to be gimplified.  */
	  if (TREE_CODE (GOTO_DESTINATION (*expr_p)) != LABEL_DECL)
	    {
	      ret = gimplify_expr (&GOTO_DESTINATION (*expr_p), pre_p,
				   NULL, is_gimple_val, fb_rvalue);
	      if (ret == GS_ERROR)
		break;
	    }
	  gimplify_seq_add_stmt (pre_p,
			  gimple_build_goto (GOTO_DESTINATION (*expr_p)));
	  ret = GS_ALL_DONE;
	  break;

	case PREDICT_EXPR:
	  gimplify_seq_add_stmt (pre_p,
			gimple_build_predict (PREDICT_EXPR_PREDICTOR (*expr_p),
					      PREDICT_EXPR_OUTCOME (*expr_p)));
	  ret = GS_ALL_DONE;
	  break;

	case LABEL_EXPR:
	  ret = GS_ALL_DONE;
	  gcc_assert (decl_function_context (LABEL_EXPR_LABEL (*expr_p))
		      == current_function_decl);
	  gimplify_seq_add_stmt (pre_p,
			  gimple_build_label (LABEL_EXPR_LABEL (*expr_p)));
	  break;

	case CASE_LABEL_EXPR:
	  ret = gimplify_case_label_expr (expr_p, pre_p);
	  break;

	case RETURN_EXPR:
	  ret = gimplify_return_expr (*expr_p, pre_p);
	  break;

	case CONSTRUCTOR:
	  /* Don't reduce this in place; let gimplify_init_constructor work its
	     magic.  Buf if we're just elaborating this for side effects, just
	     gimplify any element that has side-effects.  */
	  if (fallback == fb_none)
	    {
	      unsigned HOST_WIDE_INT ix;
	      tree val;
	      tree temp = NULL_TREE;
	      FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (*expr_p), ix, val)
		if (TREE_SIDE_EFFECTS (val))
		  append_to_statement_list (val, &temp);

	      *expr_p = temp;
	      ret = temp ? GS_OK : GS_ALL_DONE;
	    }
	  /* C99 code may assign to an array in a constructed
	     structure or union, and this has undefined behavior only
	     on execution, so create a temporary if an lvalue is
	     required.  */
	  else if (fallback == fb_lvalue)
	    {
	      *expr_p = get_initialized_tmp_var (*expr_p, pre_p, post_p);
	      mark_addressable (*expr_p);
	      ret = GS_OK;
	    }
	  else
	    ret = GS_ALL_DONE;
	  break;

	  /* The following are special cases that are not handled by the
	     original GIMPLE grammar.  */

	  /* SAVE_EXPR nodes are converted into a GIMPLE identifier and
	     eliminated.  */
	case SAVE_EXPR:
	  ret = gimplify_save_expr (expr_p, pre_p, post_p);
	  break;

	case BIT_FIELD_REF:
	  ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
			       post_p, is_gimple_lvalue, fb_either);
	  recalculate_side_effects (*expr_p);
	  break;

	case TARGET_MEM_REF:
	  {
	    enum gimplify_status r0 = GS_ALL_DONE, r1 = GS_ALL_DONE;

	    if (TMR_BASE (*expr_p))
	      r0 = gimplify_expr (&TMR_BASE (*expr_p), pre_p,
				  post_p, is_gimple_mem_ref_addr, fb_either);
	    if (TMR_INDEX (*expr_p))
	      r1 = gimplify_expr (&TMR_INDEX (*expr_p), pre_p,
				  post_p, is_gimple_val, fb_rvalue);
	    if (TMR_INDEX2 (*expr_p))
	      r1 = gimplify_expr (&TMR_INDEX2 (*expr_p), pre_p,
				  post_p, is_gimple_val, fb_rvalue);
	    /* TMR_STEP and TMR_OFFSET are always integer constants.  */
	    ret = MIN (r0, r1);
	  }
	  break;

	case NON_LVALUE_EXPR:
	  /* This should have been stripped above.  */
	  gcc_unreachable ();

	case ASM_EXPR:
	  ret = gimplify_asm_expr (expr_p, pre_p, post_p);
	  break;

	case TRY_FINALLY_EXPR:
	case TRY_CATCH_EXPR:
	  {
	    gimple_seq eval, cleanup;
	    gimple try_;

	    /* Calls to destructors are generated automatically in FINALLY/CATCH
	       block. They should have location as UNKNOWN_LOCATION. However,
	       gimplify_call_expr will reset these call stmts to input_location
	       if it finds stmt's location is unknown. To prevent resetting for
	       destructors, we set the input_location to unknown.
	       Note that this only affects the destructor calls in FINALLY/CATCH
	       block, and will automatically reset to its original value by the
	       end of gimplify_expr.  */
	    input_location = UNKNOWN_LOCATION;
	    eval = cleanup = NULL;
	    gimplify_and_add (TREE_OPERAND (*expr_p, 0), &eval);
	    gimplify_and_add (TREE_OPERAND (*expr_p, 1), &cleanup);
	    /* Don't create bogus GIMPLE_TRY with empty cleanup.  */
	    if (gimple_seq_empty_p (cleanup))
	      {
		gimple_seq_add_seq (pre_p, eval);
		ret = GS_ALL_DONE;
		break;
	      }
	    try_ = gimple_build_try (eval, cleanup,
				     TREE_CODE (*expr_p) == TRY_FINALLY_EXPR
				     ? GIMPLE_TRY_FINALLY
				     : GIMPLE_TRY_CATCH);
	    if (LOCATION_LOCUS (saved_location) != UNKNOWN_LOCATION)
	      gimple_set_location (try_, saved_location);
	    else
	      gimple_set_location (try_, EXPR_LOCATION (save_expr));
	    if (TREE_CODE (*expr_p) == TRY_CATCH_EXPR)
	      gimple_try_set_catch_is_cleanup (try_,
					       TRY_CATCH_IS_CLEANUP (*expr_p));
	    gimplify_seq_add_stmt (pre_p, try_);
	    ret = GS_ALL_DONE;
	    break;
	  }

	case CLEANUP_POINT_EXPR:
	  ret = gimplify_cleanup_point_expr (expr_p, pre_p);
	  break;

	case TARGET_EXPR:
	  ret = gimplify_target_expr (expr_p, pre_p, post_p);
	  break;

	case CATCH_EXPR:
	  {
	    gimple c;
	    gimple_seq handler = NULL;
	    gimplify_and_add (CATCH_BODY (*expr_p), &handler);
	    c = gimple_build_catch (CATCH_TYPES (*expr_p), handler);
	    gimplify_seq_add_stmt (pre_p, c);
	    ret = GS_ALL_DONE;
	    break;
	  }

	case EH_FILTER_EXPR:
	  {
	    gimple ehf;
	    gimple_seq failure = NULL;

	    gimplify_and_add (EH_FILTER_FAILURE (*expr_p), &failure);
	    ehf = gimple_build_eh_filter (EH_FILTER_TYPES (*expr_p), failure);
	    gimple_set_no_warning (ehf, TREE_NO_WARNING (*expr_p));
	    gimplify_seq_add_stmt (pre_p, ehf);
	    ret = GS_ALL_DONE;
	    break;
	  }

	case OBJ_TYPE_REF:
	  {
	    enum gimplify_status r0, r1;
	    r0 = gimplify_expr (&OBJ_TYPE_REF_OBJECT (*expr_p), pre_p,
				post_p, is_gimple_val, fb_rvalue);
	    r1 = gimplify_expr (&OBJ_TYPE_REF_EXPR (*expr_p), pre_p,
				post_p, is_gimple_val, fb_rvalue);
	    TREE_SIDE_EFFECTS (*expr_p) = 0;
	    ret = MIN (r0, r1);
	  }
	  break;

	case LABEL_DECL:
	  /* We get here when taking the address of a label.  We mark
	     the label as "forced"; meaning it can never be removed and
	     it is a potential target for any computed goto.  */
	  FORCED_LABEL (*expr_p) = 1;
	  ret = GS_ALL_DONE;
	  break;

	case STATEMENT_LIST:
	  ret = gimplify_statement_list (expr_p, pre_p);
	  break;

	case WITH_SIZE_EXPR:
	  {
	    gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
			   post_p == &internal_post ? NULL : post_p,
			   gimple_test_f, fallback);
	    gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p,
			   is_gimple_val, fb_rvalue);
	    ret = GS_ALL_DONE;
	  }
	  break;

	case VAR_DECL:
	case PARM_DECL:
	  ret = gimplify_var_or_parm_decl (expr_p);
	  break;

	case RESULT_DECL:
	  /* When within an OpenMP context, notice uses of variables.  */
	  if (gimplify_omp_ctxp)
	    omp_notice_variable (gimplify_omp_ctxp, *expr_p, true);
	  ret = GS_ALL_DONE;
	  break;

	case SSA_NAME:
	  /* Allow callbacks into the gimplifier during optimization.  */
	  ret = GS_ALL_DONE;
	  break;

	case OMP_PARALLEL:
	  gimplify_omp_parallel (expr_p, pre_p);
	  ret = GS_ALL_DONE;
	  break;

	case OMP_TASK:
	  gimplify_omp_task (expr_p, pre_p);
	  ret = GS_ALL_DONE;
	  break;

	case OMP_FOR:
	case OMP_SIMD:
	case CILK_SIMD:
	case OMP_DISTRIBUTE:
	  ret = gimplify_omp_for (expr_p, pre_p);
	  break;

	case OMP_SECTIONS:
	case OMP_SINGLE:
	case OMP_TARGET:
	case OMP_TARGET_DATA:
	case OMP_TEAMS:
	  gimplify_omp_workshare (expr_p, pre_p);
	  ret = GS_ALL_DONE;
	  break;

	case OMP_TARGET_UPDATE:
	  gimplify_omp_target_update (expr_p, pre_p);
	  ret = GS_ALL_DONE;
	  break;

	case OMP_SECTION:
	case OMP_MASTER:
	case OMP_TASKGROUP:
	case OMP_ORDERED:
	case OMP_CRITICAL:
	  {
	    gimple_seq body = NULL;
	    gimple g;

	    gimplify_and_add (OMP_BODY (*expr_p), &body);
	    switch (TREE_CODE (*expr_p))
	      {
	      case OMP_SECTION:
	        g = gimple_build_omp_section (body);
	        break;
	      case OMP_MASTER:
	        g = gimple_build_omp_master (body);
		break;
	      case OMP_TASKGROUP:
		{
		  gimple_seq cleanup = NULL;
		  tree fn
		    = builtin_decl_explicit (BUILT_IN_GOMP_TASKGROUP_END);
		  g = gimple_build_call (fn, 0);
		  gimple_seq_add_stmt (&cleanup, g);
		  g = gimple_build_try (body, cleanup, GIMPLE_TRY_FINALLY);
		  body = NULL;
		  gimple_seq_add_stmt (&body, g);
		  g = gimple_build_omp_taskgroup (body);
		}
		break;
	      case OMP_ORDERED:
		g = gimple_build_omp_ordered (body);
		break;
	      case OMP_CRITICAL:
		g = gimple_build_omp_critical (body,
		    			       OMP_CRITICAL_NAME (*expr_p));
		break;
	      default:
		gcc_unreachable ();
	      }
	    gimplify_seq_add_stmt (pre_p, g);
	    ret = GS_ALL_DONE;
	    break;
	  }

	case OMP_ATOMIC:
	case OMP_ATOMIC_READ:
	case OMP_ATOMIC_CAPTURE_OLD:
	case OMP_ATOMIC_CAPTURE_NEW:
	  ret = gimplify_omp_atomic (expr_p, pre_p);
	  break;

	case TRANSACTION_EXPR:
	  ret = gimplify_transaction (expr_p, pre_p);
	  break;

	case TRUTH_AND_EXPR:
	case TRUTH_OR_EXPR:
	case TRUTH_XOR_EXPR:
	  {
	    tree orig_type = TREE_TYPE (*expr_p);
	    tree new_type, xop0, xop1;
	    *expr_p = gimple_boolify (*expr_p);
	    new_type = TREE_TYPE (*expr_p);
	    if (!useless_type_conversion_p (orig_type, new_type))
	      {
		*expr_p = fold_convert_loc (input_location, orig_type, *expr_p);
		ret = GS_OK;
		break;
	      }

	  /* Boolified binary truth expressions are semantically equivalent
	     to bitwise binary expressions.  Canonicalize them to the
	     bitwise variant.  */
	    switch (TREE_CODE (*expr_p))
	      {
	      case TRUTH_AND_EXPR:
		TREE_SET_CODE (*expr_p, BIT_AND_EXPR);
		break;
	      case TRUTH_OR_EXPR:
		TREE_SET_CODE (*expr_p, BIT_IOR_EXPR);
		break;
	      case TRUTH_XOR_EXPR:
		TREE_SET_CODE (*expr_p, BIT_XOR_EXPR);
		break;
	      default:
		break;
	      }
	    /* Now make sure that operands have compatible type to
	       expression's new_type.  */
	    xop0 = TREE_OPERAND (*expr_p, 0);
	    xop1 = TREE_OPERAND (*expr_p, 1);
	    if (!useless_type_conversion_p (new_type, TREE_TYPE (xop0)))
	      TREE_OPERAND (*expr_p, 0) = fold_convert_loc (input_location,
							    new_type,
	      						    xop0);
	    if (!useless_type_conversion_p (new_type, TREE_TYPE (xop1)))
	      TREE_OPERAND (*expr_p, 1) = fold_convert_loc (input_location,
							    new_type,
	      						    xop1);
	    /* Continue classified as tcc_binary.  */
	    goto expr_2;
	  }

	case FMA_EXPR:
	case VEC_COND_EXPR:
	case VEC_PERM_EXPR:
	  /* Classified as tcc_expression.  */
	  goto expr_3;

	case POINTER_PLUS_EXPR:
	  {
	    enum gimplify_status r0, r1;
	    r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
				post_p, is_gimple_val, fb_rvalue);
	    r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p,
				post_p, is_gimple_val, fb_rvalue);
	    recalculate_side_effects (*expr_p);
	    ret = MIN (r0, r1);
	    /* Convert &X + CST to invariant &MEM[&X, CST].  Do this
	       after gimplifying operands - this is similar to how
	       it would be folding all gimplified stmts on creation
	       to have them canonicalized, which is what we eventually
	       should do anyway.  */
	    if (TREE_CODE (TREE_OPERAND (*expr_p, 1)) == INTEGER_CST
		&& is_gimple_min_invariant (TREE_OPERAND (*expr_p, 0)))
	      {
		*expr_p = build_fold_addr_expr_with_type_loc
		   (input_location,
		    fold_build2 (MEM_REF, TREE_TYPE (TREE_TYPE (*expr_p)),
				 TREE_OPERAND (*expr_p, 0),
				 fold_convert (ptr_type_node,
					       TREE_OPERAND (*expr_p, 1))),
		    TREE_TYPE (*expr_p));
		ret = MIN (ret, GS_OK);
	      }
	    break;
	  }

	case CILK_SYNC_STMT:
	  {
	    if (!fn_contains_cilk_spawn_p (cfun))
	      {
		error_at (EXPR_LOCATION (*expr_p),
			  "expected %<_Cilk_spawn%> before %<_Cilk_sync%>");
		ret = GS_ERROR;
	      }
	    else
	      {
		gimplify_cilk_sync (expr_p, pre_p);
		ret = GS_ALL_DONE;
	      }
	    break;
	  }
	
	default:
	  switch (TREE_CODE_CLASS (TREE_CODE (*expr_p)))
	    {
	    case tcc_comparison:
	      /* Handle comparison of objects of non scalar mode aggregates
	     	 with a call to memcmp.  It would be nice to only have to do
	     	 this for variable-sized objects, but then we'd have to allow
	     	 the same nest of reference nodes we allow for MODIFY_EXPR and
	     	 that's too complex.

		 Compare scalar mode aggregates as scalar mode values.  Using
		 memcmp for them would be very inefficient at best, and is
		 plain wrong if bitfields are involved.  */
		{
		  tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));

		  /* Vector comparisons need no boolification.  */
		  if (TREE_CODE (type) == VECTOR_TYPE)
		    goto expr_2;
		  else if (!AGGREGATE_TYPE_P (type))
		    {
		      tree org_type = TREE_TYPE (*expr_p);
		      *expr_p = gimple_boolify (*expr_p);
		      if (!useless_type_conversion_p (org_type,
						      TREE_TYPE (*expr_p)))
			{
			  *expr_p = fold_convert_loc (input_location,
						      org_type, *expr_p);
			  ret = GS_OK;
			}
		      else
			goto expr_2;
		    }
		  else if (TYPE_MODE (type) != BLKmode)
		    ret = gimplify_scalar_mode_aggregate_compare (expr_p);
		  else
		    ret = gimplify_variable_sized_compare (expr_p);

		  break;
		}

	    /* If *EXPR_P does not need to be special-cased, handle it
	       according to its class.  */
	    case tcc_unary:
	      ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
				   post_p, is_gimple_val, fb_rvalue);
	      break;

	    case tcc_binary:
	    expr_2:
	      {
		enum gimplify_status r0, r1;

		r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
		                    post_p, is_gimple_val, fb_rvalue);
		r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p,
				    post_p, is_gimple_val, fb_rvalue);

		ret = MIN (r0, r1);
		break;
	      }

	    expr_3:
	      {
		enum gimplify_status r0, r1, r2;

		r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
		                    post_p, is_gimple_val, fb_rvalue);
		r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p,
				    post_p, is_gimple_val, fb_rvalue);
		r2 = gimplify_expr (&TREE_OPERAND (*expr_p, 2), pre_p,
				    post_p, is_gimple_val, fb_rvalue);

		ret = MIN (MIN (r0, r1), r2);
		break;
	      }

	    case tcc_declaration:
	    case tcc_constant:
	      ret = GS_ALL_DONE;
	      goto dont_recalculate;

	    default:
	      gcc_unreachable ();
	    }

	  recalculate_side_effects (*expr_p);

	dont_recalculate:
	  break;
	}

      gcc_assert (*expr_p || ret != GS_OK);
    }
  while (ret == GS_OK);

  /* If we encountered an error_mark somewhere nested inside, either
     stub out the statement or propagate the error back out.  */
  if (ret == GS_ERROR)
    {
      if (is_statement)
	*expr_p = NULL;
      goto out;
    }

  /* This was only valid as a return value from the langhook, which
     we handled.  Make sure it doesn't escape from any other context.  */
  gcc_assert (ret != GS_UNHANDLED);

  if (fallback == fb_none && *expr_p && !is_gimple_stmt (*expr_p))
    {
      /* We aren't looking for a value, and we don't have a valid
	 statement.  If it doesn't have side-effects, throw it away.  */
      if (!TREE_SIDE_EFFECTS (*expr_p))
	*expr_p = NULL;
      else if (!TREE_THIS_VOLATILE (*expr_p))
	{
	  /* This is probably a _REF that contains something nested that
	     has side effects.  Recurse through the operands to find it.  */
	  enum tree_code code = TREE_CODE (*expr_p);

	  switch (code)
	    {
	    case COMPONENT_REF:
	    case REALPART_EXPR:
	    case IMAGPART_EXPR:
	    case VIEW_CONVERT_EXPR:
	      gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
			     gimple_test_f, fallback);
	      break;

	    case ARRAY_REF:
	    case ARRAY_RANGE_REF:
	      gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
			     gimple_test_f, fallback);
	      gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p, post_p,
			     gimple_test_f, fallback);
	      break;

	    default:
	       /* Anything else with side-effects must be converted to
		  a valid statement before we get here.  */
	      gcc_unreachable ();
	    }

	  *expr_p = NULL;
	}
      else if (COMPLETE_TYPE_P (TREE_TYPE (*expr_p))
	       && TYPE_MODE (TREE_TYPE (*expr_p)) != BLKmode)
	{
	  /* Historically, the compiler has treated a bare reference
	     to a non-BLKmode volatile lvalue as forcing a load.  */
	  tree type = TYPE_MAIN_VARIANT (TREE_TYPE (*expr_p));

	  /* Normally, we do not want to create a temporary for a
	     TREE_ADDRESSABLE type because such a type should not be
	     copied by bitwise-assignment.  However, we make an
	     exception here, as all we are doing here is ensuring that
	     we read the bytes that make up the type.  We use
	     create_tmp_var_raw because create_tmp_var will abort when
	     given a TREE_ADDRESSABLE type.  */
	  tree tmp = create_tmp_var_raw (type, "vol");
	  gimple_add_tmp_var (tmp);
	  gimplify_assign (tmp, *expr_p, pre_p);
	  *expr_p = NULL;
	}
      else
	/* We can't do anything useful with a volatile reference to
	   an incomplete type, so just throw it away.  Likewise for
	   a BLKmode type, since any implicit inner load should
	   already have been turned into an explicit one by the
	   gimplification process.  */
	*expr_p = NULL;
    }

  /* If we are gimplifying at the statement level, we're done.  Tack
     everything together and return.  */
  if (fallback == fb_none || is_statement)
    {
      /* Since *EXPR_P has been converted into a GIMPLE tuple, clear
         it out for GC to reclaim it.  */
      *expr_p = NULL_TREE;

      if (!gimple_seq_empty_p (internal_pre)
	  || !gimple_seq_empty_p (internal_post))
	{
	  gimplify_seq_add_seq (&internal_pre, internal_post);
	  gimplify_seq_add_seq (pre_p, internal_pre);
	}

      /* The result of gimplifying *EXPR_P is going to be the last few
	 statements in *PRE_P and *POST_P.  Add location information
	 to all the statements that were added by the gimplification
	 helpers.  */
      if (!gimple_seq_empty_p (*pre_p))
	annotate_all_with_location_after (*pre_p, pre_last_gsi, input_location);

      if (!gimple_seq_empty_p (*post_p))
	annotate_all_with_location_after (*post_p, post_last_gsi,
					  input_location);

      goto out;
    }

#ifdef ENABLE_GIMPLE_CHECKING
  if (*expr_p)
    {
      enum tree_code code = TREE_CODE (*expr_p);
      /* These expressions should already be in gimple IR form.  */
      gcc_assert (code != MODIFY_EXPR
		  && code != ASM_EXPR
		  && code != BIND_EXPR
		  && code != CATCH_EXPR
		  && (code != COND_EXPR || gimplify_ctxp->allow_rhs_cond_expr)
		  && code != EH_FILTER_EXPR
		  && code != GOTO_EXPR
		  && code != LABEL_EXPR
		  && code != LOOP_EXPR
		  && code != SWITCH_EXPR
		  && code != TRY_FINALLY_EXPR
		  && code != OMP_CRITICAL
		  && code != OMP_FOR
		  && code != OMP_MASTER
		  && code != OMP_TASKGROUP
		  && code != OMP_ORDERED
		  && code != OMP_PARALLEL
		  && code != OMP_SECTIONS
		  && code != OMP_SECTION
		  && code != OMP_SINGLE);
    }
#endif

  /* Otherwise we're gimplifying a subexpression, so the resulting
     value is interesting.  If it's a valid operand that matches
     GIMPLE_TEST_F, we're done. Unless we are handling some
     post-effects internally; if that's the case, we need to copy into
     a temporary before adding the post-effects to POST_P.  */
  if (gimple_seq_empty_p (internal_post) && (*gimple_test_f) (*expr_p))
    goto out;

  /* Otherwise, we need to create a new temporary for the gimplified
     expression.  */

  /* We can't return an lvalue if we have an internal postqueue.  The
     object the lvalue refers to would (probably) be modified by the
     postqueue; we need to copy the value out first, which means an
     rvalue.  */
  if ((fallback & fb_lvalue)
      && gimple_seq_empty_p (internal_post)
      && is_gimple_addressable (*expr_p))
    {
      /* An lvalue will do.  Take the address of the expression, store it
	 in a temporary, and replace the expression with an INDIRECT_REF of
	 that temporary.  */
      tmp = build_fold_addr_expr_loc (input_location, *expr_p);
      gimplify_expr (&tmp, pre_p, post_p, is_gimple_reg, fb_rvalue);
      *expr_p = build_simple_mem_ref (tmp);
    }
  else if ((fallback & fb_rvalue) && is_gimple_reg_rhs_or_call (*expr_p))
    {
      /* An rvalue will do.  Assign the gimplified expression into a
	 new temporary TMP and replace the original expression with
	 TMP.  First, make sure that the expression has a type so that
	 it can be assigned into a temporary.  */
      gcc_assert (!VOID_TYPE_P (TREE_TYPE (*expr_p)));
      *expr_p = get_formal_tmp_var (*expr_p, pre_p);
    }
  else
    {
#ifdef ENABLE_GIMPLE_CHECKING
      if (!(fallback & fb_mayfail))
	{
	  fprintf (stderr, "gimplification failed:\n");
	  print_generic_expr (stderr, *expr_p, 0);
	  debug_tree (*expr_p);
	  internal_error ("gimplification failed");
	}
#endif
      gcc_assert (fallback & fb_mayfail);

      /* If this is an asm statement, and the user asked for the
	 impossible, don't die.  Fail and let gimplify_asm_expr
	 issue an error.  */
      ret = GS_ERROR;
      goto out;
    }

  /* Make sure the temporary matches our predicate.  */
  gcc_assert ((*gimple_test_f) (*expr_p));

  if (!gimple_seq_empty_p (internal_post))
    {
      annotate_all_with_location (internal_post, input_location);
      gimplify_seq_add_seq (pre_p, internal_post);
    }

 out:
  input_location = saved_location;
  return ret;
}

/* Look through TYPE for variable-sized objects and gimplify each such
   size that we find.  Add to LIST_P any statements generated.  */

void
gimplify_type_sizes (tree type, gimple_seq *list_p)
{
  tree field, t;

  if (type == NULL || type == error_mark_node)
    return;

  /* We first do the main variant, then copy into any other variants.  */
  type = TYPE_MAIN_VARIANT (type);

  /* Avoid infinite recursion.  */
  if (TYPE_SIZES_GIMPLIFIED (type))
    return;

  TYPE_SIZES_GIMPLIFIED (type) = 1;

  switch (TREE_CODE (type))
    {
    case INTEGER_TYPE:
    case ENUMERAL_TYPE:
    case BOOLEAN_TYPE:
    case REAL_TYPE:
    case FIXED_POINT_TYPE:
      gimplify_one_sizepos (&TYPE_MIN_VALUE (type), list_p);
      gimplify_one_sizepos (&TYPE_MAX_VALUE (type), list_p);

      for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
	{
	  TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type);
	  TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type);
	}
      break;

    case ARRAY_TYPE:
      /* These types may not have declarations, so handle them here.  */
      gimplify_type_sizes (TREE_TYPE (type), list_p);
      gimplify_type_sizes (TYPE_DOMAIN (type), list_p);
      /* Ensure VLA bounds aren't removed, for -O0 they should be variables
	 with assigned stack slots, for -O1+ -g they should be tracked
	 by VTA.  */
      if (!(TYPE_NAME (type)
	    && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
	    && DECL_IGNORED_P (TYPE_NAME (type)))
	  && TYPE_DOMAIN (type)
	  && INTEGRAL_TYPE_P (TYPE_DOMAIN (type)))
	{
	  t = TYPE_MIN_VALUE (TYPE_DOMAIN (type));
	  if (t && TREE_CODE (t) == VAR_DECL && DECL_ARTIFICIAL (t))
	    DECL_IGNORED_P (t) = 0;
	  t = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
	  if (t && TREE_CODE (t) == VAR_DECL && DECL_ARTIFICIAL (t))
	    DECL_IGNORED_P (t) = 0;
	}
      break;

    case RECORD_TYPE:
    case UNION_TYPE:
    case QUAL_UNION_TYPE:
      for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
	if (TREE_CODE (field) == FIELD_DECL)
	  {
	    gimplify_one_sizepos (&DECL_FIELD_OFFSET (field), list_p);
	    gimplify_one_sizepos (&DECL_SIZE (field), list_p);
	    gimplify_one_sizepos (&DECL_SIZE_UNIT (field), list_p);
	    gimplify_type_sizes (TREE_TYPE (field), list_p);
	  }
      break;

    case POINTER_TYPE:
    case REFERENCE_TYPE:
	/* We used to recurse on the pointed-to type here, which turned out to
	   be incorrect because its definition might refer to variables not
	   yet initialized at this point if a forward declaration is involved.

	   It was actually useful for anonymous pointed-to types to ensure
	   that the sizes evaluation dominates every possible later use of the
	   values.  Restricting to such types here would be safe since there
	   is no possible forward declaration around, but would introduce an
	   undesirable middle-end semantic to anonymity.  We then defer to
	   front-ends the responsibility of ensuring that the sizes are
	   evaluated both early and late enough, e.g. by attaching artificial
	   type declarations to the tree.  */
      break;

    default:
      break;
    }

  gimplify_one_sizepos (&TYPE_SIZE (type), list_p);
  gimplify_one_sizepos (&TYPE_SIZE_UNIT (type), list_p);

  for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
    {
      TYPE_SIZE (t) = TYPE_SIZE (type);
      TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type);
      TYPE_SIZES_GIMPLIFIED (t) = 1;
    }
}

/* A subroutine of gimplify_type_sizes to make sure that *EXPR_P,
   a size or position, has had all of its SAVE_EXPRs evaluated.
   We add any required statements to *STMT_P.  */

void
gimplify_one_sizepos (tree *expr_p, gimple_seq *stmt_p)
{
  tree expr = *expr_p;

  /* We don't do anything if the value isn't there, is constant, or contains
     A PLACEHOLDER_EXPR.  We also don't want to do anything if it's already
     a VAR_DECL.  If it's a VAR_DECL from another function, the gimplifier
     will want to replace it with a new variable, but that will cause problems
     if this type is from outside the function.  It's OK to have that here.  */
  if (is_gimple_sizepos (expr))
    return;

  *expr_p = unshare_expr (expr);

  gimplify_expr (expr_p, stmt_p, NULL, is_gimple_val, fb_rvalue);
}

/* Gimplify the body of statements of FNDECL and return a GIMPLE_BIND node
   containing the sequence of corresponding GIMPLE statements.  If DO_PARMS
   is true, also gimplify the parameters.  */

gimple
gimplify_body (tree fndecl, bool do_parms)
{
  location_t saved_location = input_location;
  gimple_seq parm_stmts, seq;
  gimple outer_bind;
  struct cgraph_node *cgn;

  timevar_push (TV_TREE_GIMPLIFY);

  /* Initialize for optimize_insn_for_s{ize,peed}_p possibly called during
     gimplification.  */
  default_rtl_profile ();

  gcc_assert (gimplify_ctxp == NULL);
  push_gimplify_context ();

  if (flag_openmp)
    {
      gcc_assert (gimplify_omp_ctxp == NULL);
      if (lookup_attribute ("omp declare target", DECL_ATTRIBUTES (fndecl)))
	gimplify_omp_ctxp = new_omp_context (ORT_TARGET);
    }

  /* Unshare most shared trees in the body and in that of any nested functions.
     It would seem we don't have to do this for nested functions because
     they are supposed to be output and then the outer function gimplified
     first, but the g++ front end doesn't always do it that way.  */
  unshare_body (fndecl);
  unvisit_body (fndecl);

  cgn = cgraph_get_node (fndecl);
  if (cgn && cgn->origin)
    nonlocal_vlas = pointer_set_create ();

  /* Make sure input_location isn't set to something weird.  */
  input_location = DECL_SOURCE_LOCATION (fndecl);

  /* Resolve callee-copies.  This has to be done before processing
     the body so that DECL_VALUE_EXPR gets processed correctly.  */
  parm_stmts = do_parms ? gimplify_parameters () : NULL;

  /* Gimplify the function's body.  */
  seq = NULL;
  gimplify_stmt (&DECL_SAVED_TREE (fndecl), &seq);
  outer_bind = gimple_seq_first_stmt (seq);
  if (!outer_bind)
    {
      outer_bind = gimple_build_nop ();
      gimplify_seq_add_stmt (&seq, outer_bind);
    }

  /* The body must contain exactly one statement, a GIMPLE_BIND.  If this is
     not the case, wrap everything in a GIMPLE_BIND to make it so.  */
  if (gimple_code (outer_bind) == GIMPLE_BIND
      && gimple_seq_first (seq) == gimple_seq_last (seq))
    ;
  else
    outer_bind = gimple_build_bind (NULL_TREE, seq, NULL);

  DECL_SAVED_TREE (fndecl) = NULL_TREE;

  /* If we had callee-copies statements, insert them at the beginning
     of the function and clear DECL_VALUE_EXPR_P on the parameters.  */
  if (!gimple_seq_empty_p (parm_stmts))
    {
      tree parm;

      gimplify_seq_add_seq (&parm_stmts, gimple_bind_body (outer_bind));
      gimple_bind_set_body (outer_bind, parm_stmts);

      for (parm = DECL_ARGUMENTS (current_function_decl);
	   parm; parm = DECL_CHAIN (parm))
	if (DECL_HAS_VALUE_EXPR_P (parm))
	  {
	    DECL_HAS_VALUE_EXPR_P (parm) = 0;
	    DECL_IGNORED_P (parm) = 0;
	  }
    }

  if (nonlocal_vlas)
    {
      if (nonlocal_vla_vars)
	{
	  /* tree-nested.c may later on call declare_vars (..., true);
	     which relies on BLOCK_VARS chain to be the tail of the
	     gimple_bind_vars chain.  Ensure we don't violate that
	     assumption.  */
	  if (gimple_bind_block (outer_bind)
	      == DECL_INITIAL (current_function_decl))
	    declare_vars (nonlocal_vla_vars, outer_bind, true);
	  else
	    BLOCK_VARS (DECL_INITIAL (current_function_decl))
	      = chainon (BLOCK_VARS (DECL_INITIAL (current_function_decl)),
			 nonlocal_vla_vars);
	  nonlocal_vla_vars = NULL_TREE;
	}
      pointer_set_destroy (nonlocal_vlas);
      nonlocal_vlas = NULL;
    }

  if ((flag_openmp || flag_openmp_simd) && gimplify_omp_ctxp)
    {
      delete_omp_context (gimplify_omp_ctxp);
      gimplify_omp_ctxp = NULL;
    }

  pop_gimplify_context (outer_bind);
  gcc_assert (gimplify_ctxp == NULL);

#ifdef ENABLE_CHECKING
  if (!seen_error ())
    verify_gimple_in_seq (gimple_bind_body (outer_bind));
#endif

  timevar_pop (TV_TREE_GIMPLIFY);
  input_location = saved_location;

  return outer_bind;
}

typedef char *char_p; /* For DEF_VEC_P.  */

/* Return whether we should exclude FNDECL from instrumentation.  */

static bool
flag_instrument_functions_exclude_p (tree fndecl)
{
  vec<char_p> *v;

  v = (vec<char_p> *) flag_instrument_functions_exclude_functions;
  if (v && v->length () > 0)
    {
      const char *name;
      int i;
      char *s;

      name = lang_hooks.decl_printable_name (fndecl, 0);
      FOR_EACH_VEC_ELT (*v, i, s)
	if (strstr (name, s) != NULL)
	  return true;
    }

  v = (vec<char_p> *) flag_instrument_functions_exclude_files;
  if (v && v->length () > 0)
    {
      const char *name;
      int i;
      char *s;

      name = DECL_SOURCE_FILE (fndecl);
      FOR_EACH_VEC_ELT (*v, i, s)
	if (strstr (name, s) != NULL)
	  return true;
    }

  return false;
}

/* Entry point to the gimplification pass.  FNDECL is the FUNCTION_DECL
   node for the function we want to gimplify.

   Return the sequence of GIMPLE statements corresponding to the body
   of FNDECL.  */

void
gimplify_function_tree (tree fndecl)
{
  tree parm, ret;
  gimple_seq seq;
  gimple bind;

  gcc_assert (!gimple_body (fndecl));

  if (DECL_STRUCT_FUNCTION (fndecl))
    push_cfun (DECL_STRUCT_FUNCTION (fndecl));
  else
    push_struct_function (fndecl);

  for (parm = DECL_ARGUMENTS (fndecl); parm ; parm = DECL_CHAIN (parm))
    {
      /* Preliminarily mark non-addressed complex variables as eligible
         for promotion to gimple registers.  We'll transform their uses
         as we find them.  */
      if ((TREE_CODE (TREE_TYPE (parm)) == COMPLEX_TYPE
	   || TREE_CODE (TREE_TYPE (parm)) == VECTOR_TYPE)
          && !TREE_THIS_VOLATILE (parm)
          && !needs_to_live_in_memory (parm))
        DECL_GIMPLE_REG_P (parm) = 1;
    }

  ret = DECL_RESULT (fndecl);
  if ((TREE_CODE (TREE_TYPE (ret)) == COMPLEX_TYPE
       || TREE_CODE (TREE_TYPE (ret)) == VECTOR_TYPE)
      && !needs_to_live_in_memory (ret))
    DECL_GIMPLE_REG_P (ret) = 1;

  bind = gimplify_body (fndecl, true);

  /* The tree body of the function is no longer needed, replace it
     with the new GIMPLE body.  */
  seq = NULL;
  gimple_seq_add_stmt (&seq, bind);
  gimple_set_body (fndecl, seq);

  /* If we're instrumenting function entry/exit, then prepend the call to
     the entry hook and wrap the whole function in a TRY_FINALLY_EXPR to
     catch the exit hook.  */
  /* ??? Add some way to ignore exceptions for this TFE.  */
  if (flag_instrument_function_entry_exit
      && !DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (fndecl)
      && !flag_instrument_functions_exclude_p (fndecl))
    {
      tree x;
      gimple new_bind;
      gimple tf;
      gimple_seq cleanup = NULL, body = NULL;
      tree tmp_var;
      gimple call;

      x = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
      call = gimple_build_call (x, 1, integer_zero_node);
      tmp_var = create_tmp_var (ptr_type_node, "return_addr");
      gimple_call_set_lhs (call, tmp_var);
      gimplify_seq_add_stmt (&cleanup, call);
      x = builtin_decl_implicit (BUILT_IN_PROFILE_FUNC_EXIT);
      call = gimple_build_call (x, 2,
				build_fold_addr_expr (current_function_decl),
				tmp_var);
      gimplify_seq_add_stmt (&cleanup, call);
      tf = gimple_build_try (seq, cleanup, GIMPLE_TRY_FINALLY);

      x = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
      call = gimple_build_call (x, 1, integer_zero_node);
      tmp_var = create_tmp_var (ptr_type_node, "return_addr");
      gimple_call_set_lhs (call, tmp_var);
      gimplify_seq_add_stmt (&body, call);
      x = builtin_decl_implicit (BUILT_IN_PROFILE_FUNC_ENTER);
      call = gimple_build_call (x, 2,
				build_fold_addr_expr (current_function_decl),
				tmp_var);
      gimplify_seq_add_stmt (&body, call);
      gimplify_seq_add_stmt (&body, tf);
      new_bind = gimple_build_bind (NULL, body, gimple_bind_block (bind));
      /* Clear the block for BIND, since it is no longer directly inside
         the function, but within a try block.  */
      gimple_bind_set_block (bind, NULL);

      /* Replace the current function body with the body
         wrapped in the try/finally TF.  */
      seq = NULL;
      gimple_seq_add_stmt (&seq, new_bind);
      gimple_set_body (fndecl, seq);
    }

  DECL_SAVED_TREE (fndecl) = NULL_TREE;
  cfun->curr_properties = PROP_gimple_any;

  pop_cfun ();
}

/* Return a dummy expression of type TYPE in order to keep going after an
   error.  */

static tree
dummy_object (tree type)
{
  tree t = build_int_cst (build_pointer_type (type), 0);
  return build2 (MEM_REF, type, t, t);
}

/* Gimplify __builtin_va_arg, aka VA_ARG_EXPR, which is not really a
   builtin function, but a very special sort of operator.  */

enum gimplify_status
gimplify_va_arg_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
{
  tree promoted_type, have_va_type;
  tree valist = TREE_OPERAND (*expr_p, 0);
  tree type = TREE_TYPE (*expr_p);
  tree t;
  location_t loc = EXPR_LOCATION (*expr_p);

  /* Verify that valist is of the proper type.  */
  have_va_type = TREE_TYPE (valist);
  if (have_va_type == error_mark_node)
    return GS_ERROR;
  have_va_type = targetm.canonical_va_list_type (have_va_type);

  if (have_va_type == NULL_TREE)
    {
      error_at (loc, "first argument to %<va_arg%> not of type %<va_list%>");
      return GS_ERROR;
    }

  /* Generate a diagnostic for requesting data of a type that cannot
     be passed through `...' due to type promotion at the call site.  */
  if ((promoted_type = lang_hooks.types.type_promotes_to (type))
	   != type)
    {
      static bool gave_help;
      bool warned;

      /* Unfortunately, this is merely undefined, rather than a constraint
	 violation, so we cannot make this an error.  If this call is never
	 executed, the program is still strictly conforming.  */
      warned = warning_at (loc, 0,
	  		   "%qT is promoted to %qT when passed through %<...%>",
			   type, promoted_type);
      if (!gave_help && warned)
	{
	  gave_help = true;
	  inform (loc, "(so you should pass %qT not %qT to %<va_arg%>)",
		  promoted_type, type);
	}

      /* We can, however, treat "undefined" any way we please.
	 Call abort to encourage the user to fix the program.  */
      if (warned)
	inform (loc, "if this code is reached, the program will abort");
      /* Before the abort, allow the evaluation of the va_list
	 expression to exit or longjmp.  */
      gimplify_and_add (valist, pre_p);
      t = build_call_expr_loc (loc,
			       builtin_decl_implicit (BUILT_IN_TRAP), 0);
      gimplify_and_add (t, pre_p);

      /* This is dead code, but go ahead and finish so that the
	 mode of the result comes out right.  */
      *expr_p = dummy_object (type);
      return GS_ALL_DONE;
    }
  else
    {
      /* Make it easier for the backends by protecting the valist argument
	 from multiple evaluations.  */
      if (TREE_CODE (have_va_type) == ARRAY_TYPE)
	{
	  /* For this case, the backends will be expecting a pointer to
	     TREE_TYPE (abi), but it's possible we've
	     actually been given an array (an actual TARGET_FN_ABI_VA_LIST).
	     So fix it.  */
	  if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
	    {
	      tree p1 = build_pointer_type (TREE_TYPE (have_va_type));
	      valist = fold_convert_loc (loc, p1,
					 build_fold_addr_expr_loc (loc, valist));
	    }

	  gimplify_expr (&valist, pre_p, post_p, is_gimple_val, fb_rvalue);
	}
      else
	gimplify_expr (&valist, pre_p, post_p, is_gimple_min_lval, fb_lvalue);

      if (!targetm.gimplify_va_arg_expr)
	/* FIXME: Once most targets are converted we should merely
	   assert this is non-null.  */
	return GS_ALL_DONE;

      *expr_p = targetm.gimplify_va_arg_expr (valist, type, pre_p, post_p);
      return GS_OK;
    }
}

/* Build a new GIMPLE_ASSIGN tuple and append it to the end of *SEQ_P.

   DST/SRC are the destination and source respectively.  You can pass
   ungimplified trees in DST or SRC, in which case they will be
   converted to a gimple operand if necessary.

   This function returns the newly created GIMPLE_ASSIGN tuple.  */

gimple
gimplify_assign (tree dst, tree src, gimple_seq *seq_p)
{
  tree t = build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
  gimplify_and_add (t, seq_p);
  ggc_free (t);
  return gimple_seq_last_stmt (*seq_p);
}

inline hashval_t
gimplify_hasher::hash (const value_type *p)
{
  tree t = p->val;
  return iterative_hash_expr (t, 0);
}

inline bool
gimplify_hasher::equal (const value_type *p1, const compare_type *p2)
{
  tree t1 = p1->val;
  tree t2 = p2->val;
  enum tree_code code = TREE_CODE (t1);

  if (TREE_CODE (t2) != code
      || TREE_TYPE (t1) != TREE_TYPE (t2))
    return false;

  if (!operand_equal_p (t1, t2, 0))
    return false;

#ifdef ENABLE_CHECKING
  /* Only allow them to compare equal if they also hash equal; otherwise
     results are nondeterminate, and we fail bootstrap comparison.  */
  gcc_assert (hash (p1) == hash (p2));
#endif

  return true;
}