aboutsummaryrefslogtreecommitdiff
path: root/gcc/tree.h
blob: 55a5d8f8618c1adb946dcda0b18ffc9326a47ef0 (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
/* Front-end tree definitions for GNU compiler.
   Copyright (C) 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, 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 COPYING.  If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.  */

#ifndef GCC_TREE_H
#define GCC_TREE_H

#include "hashtab.h"
#include "machmode.h"
#include "input.h"
#include "statistics.h"
#include "vec.h"

/* Codes of tree nodes */

#define DEFTREECODE(SYM, STRING, TYPE, NARGS)   SYM,

enum tree_code {
#include "tree.def"

  LAST_AND_UNUSED_TREE_CODE	/* A convenient way to get a value for
				   NUM_TREE_CODES.  */
};

#undef DEFTREECODE

extern unsigned char tree_contains_struct[256][64];
#define CODE_CONTAINS_STRUCT(CODE, STRUCT) (tree_contains_struct[(CODE)][(STRUCT)])

/* Number of language-independent tree codes.  */
#define NUM_TREE_CODES ((int) LAST_AND_UNUSED_TREE_CODE)

/* Tree code classes.  */

/* Each tree_code has an associated code class represented by a
   TREE_CODE_CLASS.  */

enum tree_code_class {
  tcc_exceptional, /* An exceptional code (fits no category).  */
  tcc_constant,    /* A constant.  */
  /* Order of tcc_type and tcc_declaration is important.  */
  tcc_type,        /* A type object code.  */
  tcc_declaration, /* A declaration (also serving as variable refs).  */
  tcc_reference,   /* A reference to storage.  */
  tcc_comparison,  /* A comparison expression.  */
  tcc_unary,       /* A unary arithmetic expression.  */
  tcc_binary,      /* A binary arithmetic expression.  */
  tcc_statement,   /* A statement expression, which have side effects
		      but usually no interesting value.  */
  tcc_expression   /* Any other expression.  */
};

/* Each tree code class has an associated string representation.
   These must correspond to the tree_code_class entries.  */

extern const char *const tree_code_class_strings[];

/* Returns the string representing CLASS.  */

#define TREE_CODE_CLASS_STRING(CLASS)\
        tree_code_class_strings[(int) (CLASS)]

#define MAX_TREE_CODES 256
extern const enum tree_code_class tree_code_type[];
#define TREE_CODE_CLASS(CODE)	tree_code_type[(int) (CODE)]

/* Nonzero if CODE represents an exceptional code.  */

#define EXCEPTIONAL_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_exceptional)

/* Nonzero if CODE represents a constant.  */

#define CONSTANT_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_constant)

/* Nonzero if CODE represents a type.  */

#define TYPE_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_type)

/* Nonzero if CODE represents a declaration.  */

#define DECL_P(CODE)\
        (TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_declaration)

/* Nonzero if CODE represents a memory tag.  */

#define MTAG_P(CODE) \
  (TREE_CODE (CODE) == STRUCT_FIELD_TAG		\
   || TREE_CODE (CODE) == NAME_MEMORY_TAG	\
   || TREE_CODE (CODE) == SYMBOL_MEMORY_TAG)
        

/* Nonzero if DECL represents a VAR_DECL or FUNCTION_DECL.  */

#define VAR_OR_FUNCTION_DECL_P(DECL)\
  (TREE_CODE (DECL) == VAR_DECL || TREE_CODE (DECL) == FUNCTION_DECL)

/* Nonzero if CODE represents a INDIRECT_REF.  Keep these checks in
   ascending code order.  */

#define INDIRECT_REF_P(CODE)\
  (TREE_CODE (CODE) == INDIRECT_REF \
   || TREE_CODE (CODE) == ALIGN_INDIRECT_REF \
   || TREE_CODE (CODE) == MISALIGNED_INDIRECT_REF)

/* Nonzero if CODE represents a reference.  */

#define REFERENCE_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_reference)

/* Nonzero if CODE represents a comparison.  */

#define COMPARISON_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_comparison)

/* Nonzero if CODE represents a unary arithmetic expression.  */

#define UNARY_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_unary)

/* Nonzero if CODE represents a binary arithmetic expression.  */

#define BINARY_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_binary)

/* Nonzero if CODE represents a statement expression.  */

#define STATEMENT_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_statement)

/* Nonzero if CODE represents any other expression.  */

#define EXPRESSION_CLASS_P(CODE)\
	(TREE_CODE_CLASS (TREE_CODE (CODE)) == tcc_expression)

/* Returns nonzero iff CODE represents a type or declaration.  */

#define IS_TYPE_OR_DECL_P(CODE)\
	(TYPE_P (CODE) || DECL_P (CODE))

/* Returns nonzero iff CLASS is the tree-code class of an
   expression.  */

#define IS_EXPR_CODE_CLASS(CLASS)\
	((CLASS) >= tcc_reference && (CLASS) <= tcc_expression)

/* Returns nonzero iff NODE is an expression of some kind.  */

#define EXPR_P(NODE) IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (NODE)))

/* Returns nonzero iff NODE is an OpenMP directive.  */

#define OMP_DIRECTIVE_P(NODE)				\
    (TREE_CODE (NODE) == OMP_PARALLEL			\
     || TREE_CODE (NODE) == OMP_FOR			\
     || TREE_CODE (NODE) == OMP_SECTIONS		\
     || TREE_CODE (NODE) == OMP_SINGLE			\
     || TREE_CODE (NODE) == OMP_SECTION			\
     || TREE_CODE (NODE) == OMP_MASTER			\
     || TREE_CODE (NODE) == OMP_ORDERED			\
     || TREE_CODE (NODE) == OMP_CRITICAL		\
     || TREE_CODE (NODE) == OMP_RETURN			\
     || TREE_CODE (NODE) == OMP_CONTINUE)

/* Number of argument-words in each kind of tree-node.  */

extern const unsigned char tree_code_length[];
#define TREE_CODE_LENGTH(CODE)	tree_code_length[(int) (CODE)]

/* Names of tree components.  */

extern const char *const tree_code_name[];

/* A vectors of trees.  */
DEF_VEC_P(tree);
DEF_VEC_ALLOC_P(tree,gc);
DEF_VEC_ALLOC_P(tree,heap);


/* Classify which part of the compiler has defined a given builtin function.
   Note that we assume below that this is no more than two bits.  */
enum built_in_class
{
  NOT_BUILT_IN = 0,
  BUILT_IN_FRONTEND,
  BUILT_IN_MD,
  BUILT_IN_NORMAL
};

/* Names for the above.  */
extern const char *const built_in_class_names[4];

/* Codes that identify the various built in functions
   so that expand_call can identify them quickly.  */

#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) ENUM,
enum built_in_function
{
#include "builtins.def"

  /* Complex division routines in libgcc.  These are done via builtins
     because emit_library_call_value can't handle complex values.  */
  BUILT_IN_COMPLEX_MUL_MIN,
  BUILT_IN_COMPLEX_MUL_MAX
    = BUILT_IN_COMPLEX_MUL_MIN
      + MAX_MODE_COMPLEX_FLOAT
      - MIN_MODE_COMPLEX_FLOAT,

  BUILT_IN_COMPLEX_DIV_MIN,
  BUILT_IN_COMPLEX_DIV_MAX
    = BUILT_IN_COMPLEX_DIV_MIN
      + MAX_MODE_COMPLEX_FLOAT
      - MIN_MODE_COMPLEX_FLOAT,

  /* Upper bound on non-language-specific builtins.  */
  END_BUILTINS
};
#undef DEF_BUILTIN

/* Names for the above.  */
extern const char * built_in_names[(int) END_BUILTINS];

/* Helper macros for math builtins.  */

#define BUILTIN_EXP10_P(FN) \
 ((FN) == BUILT_IN_EXP10 || (FN) == BUILT_IN_EXP10F || (FN) == BUILT_IN_EXP10L \
  || (FN) == BUILT_IN_POW10 || (FN) == BUILT_IN_POW10F || (FN) == BUILT_IN_POW10L)

#define BUILTIN_EXPONENT_P(FN) (BUILTIN_EXP10_P (FN) \
  || (FN) == BUILT_IN_EXP || (FN) == BUILT_IN_EXPF || (FN) == BUILT_IN_EXPL \
  || (FN) == BUILT_IN_EXP2 || (FN) == BUILT_IN_EXP2F || (FN) == BUILT_IN_EXP2L)

#define BUILTIN_SQRT_P(FN) \
 ((FN) == BUILT_IN_SQRT || (FN) == BUILT_IN_SQRTF || (FN) == BUILT_IN_SQRTL)

#define BUILTIN_CBRT_P(FN) \
 ((FN) == BUILT_IN_CBRT || (FN) == BUILT_IN_CBRTF || (FN) == BUILT_IN_CBRTL)

#define BUILTIN_ROOT_P(FN) (BUILTIN_SQRT_P (FN) || BUILTIN_CBRT_P (FN))

#define CASE_FLT_FN(FN) case FN: case FN##F: case FN##L
#define CASE_INT_FN(FN) case FN: case FN##L: case FN##LL

/* An array of _DECL trees for the above.  */
extern GTY(()) tree built_in_decls[(int) END_BUILTINS];
extern GTY(()) tree implicit_built_in_decls[(int) END_BUILTINS];

/* In an OMP_CLAUSE node.  */

/* Number of operands and names for each clause.  */
extern unsigned const char omp_clause_num_ops[];
extern const char * const omp_clause_code_name[];

/* Clause codes.  Do not reorder, as this is used to index into the tables
   omp_clause_num_ops and omp_clause_code_name.  */
enum omp_clause_code
{
  /* Clause zero is special-cased inside the parser
     (c_parser_omp_variable_list).  */
  OMP_CLAUSE_ERROR = 0,

  /* OpenMP clause: private (variable_list).  */
  OMP_CLAUSE_PRIVATE,

  /* OpenMP clause: shared (variable_list).  */
  OMP_CLAUSE_SHARED,

  /* OpenMP clause: firstprivate (variable_list).  */
  OMP_CLAUSE_FIRSTPRIVATE,

  /* OpenMP clause: lastprivate (variable_list).  */
  OMP_CLAUSE_LASTPRIVATE,

  /* OpenMP clause: reduction (operator:variable_list).
     OMP_CLAUSE_REDUCTION_CODE: The tree_code of the operator.
     Operand 1: OMP_CLAUSE_REDUCTION_INIT: Stmt-list to initialize the var.
     Operand 2: OMP_CLAUSE_REDUCTION_MERGE: Stmt-list to merge private var 
                into the shared one.
     Operand 3: OMP_CLAUSE_REDUCTION_PLACEHOLDER: A dummy VAR_DECL
                placeholder used in OMP_CLAUSE_REDUCTION_MERGE.  */
  OMP_CLAUSE_REDUCTION,

  /* OpenMP clause: copyin (variable_list).  */
  OMP_CLAUSE_COPYIN,

  /* OpenMP clause: copyprivate (variable_list).  */
  OMP_CLAUSE_COPYPRIVATE,

  /* OpenMP clause: if (scalar-expression).  */
  OMP_CLAUSE_IF,

  /* OpenMP clause: num_threads (integer-expression).  */
  OMP_CLAUSE_NUM_THREADS,

  /* OpenMP clause: schedule.  */
  OMP_CLAUSE_SCHEDULE,

  /* OpenMP clause: nowait.  */
  OMP_CLAUSE_NOWAIT,

  /* OpenMP clause: ordered.  */
  OMP_CLAUSE_ORDERED,

  /* OpenMP clause: default.  */
  OMP_CLAUSE_DEFAULT
};

/* The definition of tree nodes fills the next several pages.  */

/* A tree node can represent a data type, a variable, an expression
   or a statement.  Each node has a TREE_CODE which says what kind of
   thing it represents.  Some common codes are:
   INTEGER_TYPE -- represents a type of integers.
   ARRAY_TYPE -- represents a type of pointer.
   VAR_DECL -- represents a declared variable.
   INTEGER_CST -- represents a constant integer value.
   PLUS_EXPR -- represents a sum (an expression).

   As for the contents of a tree node: there are some fields
   that all nodes share.  Each TREE_CODE has various special-purpose
   fields as well.  The fields of a node are never accessed directly,
   always through accessor macros.  */

/* Every kind of tree node starts with this structure,
   so all nodes have these fields.

   See the accessor macros, defined below, for documentation of the
   fields.  */
union tree_ann_d;

struct tree_common GTY(())
{
  tree chain;
  tree type;
  union tree_ann_d *ann;

  ENUM_BITFIELD(tree_code) code : 8;

  unsigned side_effects_flag : 1;
  unsigned constant_flag : 1;
  unsigned addressable_flag : 1;
  unsigned volatile_flag : 1;
  unsigned readonly_flag : 1;
  unsigned unsigned_flag : 1;
  unsigned asm_written_flag: 1;
  unsigned nowarning_flag : 1;

  unsigned used_flag : 1;
  unsigned nothrow_flag : 1;
  unsigned static_flag : 1;
  unsigned public_flag : 1;
  unsigned private_flag : 1;
  unsigned protected_flag : 1;
  unsigned deprecated_flag : 1;
  unsigned invariant_flag : 1;

  unsigned lang_flag_0 : 1;
  unsigned lang_flag_1 : 1;
  unsigned lang_flag_2 : 1;
  unsigned lang_flag_3 : 1;
  unsigned lang_flag_4 : 1;
  unsigned lang_flag_5 : 1;
  unsigned lang_flag_6 : 1;
  unsigned visited : 1;
};

/* The following table lists the uses of each of the above flags and
   for which types of nodes they are defined.  Note that expressions
   include decls.

   addressable_flag:

       TREE_ADDRESSABLE in
	   VAR_DECL, FUNCTION_DECL, FIELD_DECL, CONSTRUCTOR, LABEL_DECL,
	   ..._TYPE, IDENTIFIER_NODE.
	   In a STMT_EXPR, it means we want the result of the enclosed
	   expression.
       CALL_EXPR_TAILCALL in CALL_EXPR

   static_flag:

       TREE_STATIC in
           VAR_DECL, FUNCTION_DECL, CONSTRUCTOR, ADDR_EXPR
       BINFO_VIRTUAL_P in
           TREE_BINFO
       TREE_CONSTANT_OVERFLOW in
           INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
       TREE_SYMBOL_REFERENCED in
           IDENTIFIER_NODE
       CLEANUP_EH_ONLY in
           TARGET_EXPR, WITH_CLEANUP_EXPR
       ASM_INPUT_P in
           ASM_EXPR
       EH_FILTER_MUST_NOT_THROW in EH_FILTER_EXPR
       TYPE_REF_CAN_ALIAS_ALL in
           POINTER_TYPE, REFERENCE_TYPE

   public_flag:

       TREE_OVERFLOW in
           INTEGER_CST, REAL_CST, COMPLEX_CST, VECTOR_CST
       TREE_PUBLIC in
           VAR_DECL or FUNCTION_DECL or IDENTIFIER_NODE
       ASM_VOLATILE_P in
           ASM_EXPR
       TYPE_CACHED_VALUES_P in
          ..._TYPE
       SAVE_EXPR_RESOLVED_P in
	  SAVE_EXPR
       OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE in
	  OMP_CLAUSE_LASTPRIVATE
       OMP_CLAUSE_PRIVATE_DEBUG in
	  OMP_CLAUSE_PRIVATE

   private_flag:

       TREE_PRIVATE in
           ..._DECL
       CALL_EXPR_RETURN_SLOT_OPT in
           CALL_EXPR
       DECL_BY_REFERENCE in
           PARM_DECL, RESULT_DECL
       OMP_RETURN_NOWAIT in
	   OMP_RETURN
       OMP_SECTION_LAST in
	   OMP_SECTION
       OMP_PARALLEL_COMBINED in
	   OMP_PARALLEL

   protected_flag:

       TREE_PROTECTED in
           BLOCK
	   ..._DECL
       CALL_FROM_THUNK_P in
           CALL_EXPR

   side_effects_flag:

       TREE_SIDE_EFFECTS in
           all expressions
	   all decls
	   all constants

       FORCED_LABEL in
	   LABEL_DECL

   volatile_flag:

       TREE_THIS_VOLATILE in
           all expressions
       TYPE_VOLATILE in
           ..._TYPE

   readonly_flag:

       TREE_READONLY in
           all expressions
       TYPE_READONLY in
           ..._TYPE

   constant_flag:

       TREE_CONSTANT in
           all expressions
	   all decls
	   all constants
       TYPE_SIZES_GIMPLIFIED
           ..._TYPE

   unsigned_flag:

       TYPE_UNSIGNED in
           all types
       DECL_UNSIGNED in
           all decls
       BIT_FIELD_REF_UNSIGNED in
           BIT_FIELD_REF

   asm_written_flag:

       TREE_ASM_WRITTEN in
           VAR_DECL, FUNCTION_DECL, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
	   BLOCK, SSA_NAME

   used_flag:

       TREE_USED in
           expressions, IDENTIFIER_NODE

   nothrow_flag:

       TREE_NOTHROW in
           CALL_EXPR, FUNCTION_DECL

       TYPE_ALIGN_OK in
	   ..._TYPE

       TREE_THIS_NOTRAP in
          (ALIGN/MISALIGNED_)INDIRECT_REF, ARRAY_REF, ARRAY_RANGE_REF

   deprecated_flag:

	TREE_DEPRECATED in
	   ..._DECL

	IDENTIFIER_TRANSPARENT_ALIAS in
	   IDENTIFIER_NODE

   visited:

   	Used in tree traversals to mark visited nodes.

   invariant_flag:

	TREE_INVARIANT in
	    all expressions.

   nowarning_flag:

       TREE_NO_WARNING in
           ... any expr or decl node
*/
#undef DEFTREESTRUCT
#define DEFTREESTRUCT(ENUM, NAME) ENUM,
enum tree_node_structure_enum {
#include "treestruct.def"
  LAST_TS_ENUM
};
#undef DEFTREESTRUCT

/* Define accessors for the fields that all tree nodes have
   (though some fields are not used for all kinds of nodes).  */

/* The tree-code says what kind of node it is.
   Codes are defined in tree.def.  */
#define TREE_CODE(NODE) ((enum tree_code) (NODE)->common.code)
#define TREE_SET_CODE(NODE, VALUE) ((NODE)->common.code = (VALUE))

/* When checking is enabled, errors will be generated if a tree node
   is accessed incorrectly. The macros die with a fatal error.  */
#if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)

#define TREE_CHECK(T, CODE) __extension__				\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != (CODE))					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, 	\
			 (CODE), 0);					\
    __t; })

#define TREE_NOT_CHECK(T, CODE) __extension__				\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) == (CODE))					\
      tree_not_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,	\
			     (CODE), 0);				\
    __t; })

#define TREE_CHECK2(T, CODE1, CODE2) __extension__			\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != (CODE1)					\
	&& TREE_CODE (__t) != (CODE2))					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,		\
 			 (CODE1), (CODE2), 0);				\
    __t; })

#define TREE_NOT_CHECK2(T, CODE1, CODE2) __extension__			\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) == (CODE1)					\
	|| TREE_CODE (__t) == (CODE2))					\
      tree_not_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,	\
			     (CODE1), (CODE2), 0);			\
    __t; })

#define TREE_CHECK3(T, CODE1, CODE2, CODE3) __extension__		\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != (CODE1)					\
	&& TREE_CODE (__t) != (CODE2)					\
	&& TREE_CODE (__t) != (CODE3))					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,		\
			     (CODE1), (CODE2), (CODE3), 0);		\
    __t; })

#define TREE_NOT_CHECK3(T, CODE1, CODE2, CODE3) __extension__		\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) == (CODE1)					\
	|| TREE_CODE (__t) == (CODE2)					\
	|| TREE_CODE (__t) == (CODE3))					\
      tree_not_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,	\
			     (CODE1), (CODE2), (CODE3), 0);		\
    __t; })

#define TREE_CHECK4(T, CODE1, CODE2, CODE3, CODE4) __extension__	\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != (CODE1)					\
	&& TREE_CODE (__t) != (CODE2)					\
	&& TREE_CODE (__t) != (CODE3)					\
	&& TREE_CODE (__t) != (CODE4))					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,		\
			     (CODE1), (CODE2), (CODE3), (CODE4), 0);	\
    __t; })

#define NON_TREE_CHECK4(T, CODE1, CODE2, CODE3, CODE4) __extension__	\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) == (CODE1)					\
	|| TREE_CODE (__t) == (CODE2)					\
	|| TREE_CODE (__t) == (CODE3)					\
	|| TREE_CODE (__t) == (CODE4))					\
      tree_not_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,	\
			     (CODE1), (CODE2), (CODE3), (CODE4), 0);	\
    __t; })

#define TREE_CHECK5(T, CODE1, CODE2, CODE3, CODE4, CODE5) __extension__	\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != (CODE1)					\
	&& TREE_CODE (__t) != (CODE2)					\
	&& TREE_CODE (__t) != (CODE3)					\
	&& TREE_CODE (__t) != (CODE4)					\
	&& TREE_CODE (__t) != (CODE5))					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,		\
			     (CODE1), (CODE2), (CODE3), (CODE4), (CODE5), 0);\
    __t; })

#define TREE_NOT_CHECK5(T, CODE1, CODE2, CODE3, CODE4, CODE5) __extension__ \
({  const tree __t = (T);						\
    if (TREE_CODE (__t) == (CODE1)					\
	|| TREE_CODE (__t) == (CODE2)					\
	|| TREE_CODE (__t) == (CODE3)					\
	|| TREE_CODE (__t) == (CODE4)					\
	|| TREE_CODE (__t) == (CODE5))					\
      tree_not_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,	\
			     (CODE1), (CODE2), (CODE3), (CODE4), (CODE5), 0);\
    __t; })

#define CONTAINS_STRUCT_CHECK(T, STRUCT) __extension__			\
({  const tree __t = (T);						\
  if (tree_contains_struct[TREE_CODE(__t)][(STRUCT)] != 1)		\
      tree_contains_struct_check_failed (__t, (STRUCT), __FILE__, __LINE__,	\
			       __FUNCTION__);				\
    __t; })

#define TREE_CLASS_CHECK(T, CLASS) __extension__			\
({  const tree __t = (T);						\
    if (TREE_CODE_CLASS (TREE_CODE(__t)) != (CLASS))			\
      tree_class_check_failed (__t, (CLASS), __FILE__, __LINE__,	\
			       __FUNCTION__);				\
    __t; })

#define TREE_RANGE_CHECK(T, CODE1, CODE2) __extension__			\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) < (CODE1) || TREE_CODE (__t) > (CODE2))		\
      tree_range_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,	\
			       (CODE1), (CODE2));			\
    __t; })

#define OMP_CLAUSE_SUBCODE_CHECK(T, CODE) __extension__			\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != OMP_CLAUSE)					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,  	\
			 OMP_CLAUSE, 0);				\
    if (__t->omp_clause.code != (CODE))					\
      omp_clause_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, 	\
			       (CODE));					\
    __t; })

#define OMP_CLAUSE_RANGE_CHECK(T, CODE1, CODE2) __extension__		\
({  const tree __t = (T);						\
    if (TREE_CODE (__t) != OMP_CLAUSE)					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,  	\
			 OMP_CLAUSE, 0);				\
    if ((int) __t->omp_clause.code < (int) (CODE1)			\
        || (int) __t->omp_clause.code > (int) (CODE2))			\
      omp_clause_range_check_failed (__t, __FILE__, __LINE__,		\
				     __FUNCTION__, (CODE1), (CODE2));	\
    __t; })

/* These checks have to be special cased.  */
#define EXPR_CHECK(T) __extension__					\
({  const tree __t = (T);						\
    char const __c = TREE_CODE_CLASS (TREE_CODE (__t));			\
    if (!IS_EXPR_CODE_CLASS (__c))					\
      tree_class_check_failed (__t, tcc_expression, __FILE__, __LINE__,	\
			       __FUNCTION__);				\
    __t; })

/* These checks have to be special cased.  */
#define NON_TYPE_CHECK(T) __extension__					\
({  const tree __t = (T);						\
    if (TYPE_P (__t))							\
      tree_not_class_check_failed (__t, tcc_type, __FILE__, __LINE__,	\
				   __FUNCTION__);			\
    __t; })

#define TREE_VEC_ELT_CHECK(T, I) __extension__				\
(*({const tree __t = (T);						\
    const int __i = (I);						\
    if (TREE_CODE (__t) != TREE_VEC)					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,		\
  			 TREE_VEC, 0);					\
    if (__i < 0 || __i >= __t->vec.length)				\
      tree_vec_elt_check_failed (__i, __t->vec.length,			\
				 __FILE__, __LINE__, __FUNCTION__);	\
    &__t->vec.a[__i]; }))

#define PHI_NODE_ELT_CHECK(t, i) __extension__				\
(*({const tree __t = t;							\
    const int __i = (i);						\
    if (TREE_CODE (__t) != PHI_NODE)					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,  	\
			 PHI_NODE, 0);					\
    if (__i < 0 || __i >= __t->phi.capacity)				\
      phi_node_elt_check_failed (__i, __t->phi.num_args,		\
				 __FILE__, __LINE__, __FUNCTION__);	\
    &__t->phi.a[__i]; }))

#define OMP_CLAUSE_ELT_CHECK(t, i) __extension__			\
(*({const tree __t = t;							\
    const int __i = (i);						\
    if (TREE_CODE (__t) != OMP_CLAUSE)					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__,  	\
			 OMP_CLAUSE, 0);				\
    if (__i < 0 || __i >= omp_clause_num_ops [__t->omp_clause.code])	\
      omp_clause_operand_check_failed (__i, __t, __FILE__, __LINE__,	\
	                               __FUNCTION__);			\
    &__t->omp_clause.ops[__i]; }))

/* Special checks for TREE_OPERANDs.  */
#define TREE_OPERAND_CHECK(T, I) __extension__				\
(*({const tree __t = EXPR_CHECK (T);					\
    const int __i = (I);						\
    if (__i < 0 || __i >= TREE_CODE_LENGTH (TREE_CODE (__t)))		\
      tree_operand_check_failed (__i, TREE_CODE (__t),			\
				 __FILE__, __LINE__, __FUNCTION__);	\
    &__t->exp.operands[__i]; }))

#define TREE_OPERAND_CHECK_CODE(T, CODE, I) __extension__		\
(*({const tree __t = (T);						\
    const int __i = (I);						\
    if (TREE_CODE (__t) != CODE)					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, (CODE), 0);\
    if (__i < 0 || __i >= TREE_CODE_LENGTH (CODE))			\
      tree_operand_check_failed (__i, (CODE),				\
				 __FILE__, __LINE__, __FUNCTION__);	\
    &__t->exp.operands[__i]; }))

#define TREE_RTL_OPERAND_CHECK(T, CODE, I) __extension__		\
(*(rtx *)								\
 ({const tree __t = (T);						\
    const int __i = (I);						\
    if (TREE_CODE (__t) != (CODE))					\
      tree_check_failed (__t, __FILE__, __LINE__, __FUNCTION__, (CODE), 0); \
    if (__i < 0 || __i >= TREE_CODE_LENGTH ((CODE)))			\
      tree_operand_check_failed (__i, (CODE),				\
				 __FILE__, __LINE__, __FUNCTION__);	\
    &__t->exp.operands[__i]; }))

extern void tree_contains_struct_check_failed (const tree,
					       const enum tree_node_structure_enum,				     
					       const char *, int, const char *)
  ATTRIBUTE_NORETURN;

extern void tree_check_failed (const tree, const char *, int, const char *,
			       ...) ATTRIBUTE_NORETURN;
extern void tree_not_check_failed (const tree, const char *, int, const char *,
				   ...) ATTRIBUTE_NORETURN;
extern void tree_class_check_failed (const tree, const enum tree_code_class,
				     const char *, int, const char *)
    ATTRIBUTE_NORETURN;
extern void tree_range_check_failed (const tree, const char *, int,
				     const char *, enum tree_code,
				     enum tree_code);
extern void tree_not_class_check_failed (const tree,
					 const enum tree_code_class,
					 const char *, int, const char *)
    ATTRIBUTE_NORETURN;
extern void tree_vec_elt_check_failed (int, int, const char *,
				       int, const char *)
    ATTRIBUTE_NORETURN;
extern void phi_node_elt_check_failed (int, int, const char *,
				       int, const char *)
    ATTRIBUTE_NORETURN;
extern void tree_operand_check_failed (int, enum tree_code,
				       const char *, int, const char *)
    ATTRIBUTE_NORETURN;
extern void omp_clause_check_failed (const tree, const char *, int,
				     const char *, enum omp_clause_code)
    ATTRIBUTE_NORETURN;
extern void omp_clause_operand_check_failed (int, tree, const char *,
				             int, const char *)
    ATTRIBUTE_NORETURN;
extern void omp_clause_range_check_failed (const tree, const char *, int,
			       const char *, enum omp_clause_code,
			       enum omp_clause_code)
    ATTRIBUTE_NORETURN;

#else /* not ENABLE_TREE_CHECKING, or not gcc */

#define CONTAINS_STRUCT_CHECK(T, ENUM)          (T)
#define TREE_CHECK(T, CODE)			(T)
#define TREE_NOT_CHECK(T, CODE)			(T)
#define TREE_CHECK2(T, CODE1, CODE2)		(T)
#define TREE_NOT_CHECK2(T, CODE1, CODE2)	(T)
#define TREE_CHECK3(T, CODE1, CODE2, CODE3)	(T)
#define TREE_NOT_CHECK3(T, CODE1, CODE2, CODE3)	(T)
#define TREE_CHECK4(T, CODE1, CODE2, CODE3, CODE4) (T)
#define TREE_NOT_CHECK4(T, CODE1, CODE2, CODE3, CODE4) (T)
#define TREE_CHECK5(T, CODE1, CODE2, CODE3, CODE4, CODE5) (T)
#define TREE_NOT_CHECK5(T, CODE1, CODE2, CODE3, CODE4, CODE5) (T)
#define TREE_CLASS_CHECK(T, CODE)		(T)
#define TREE_RANGE_CHECK(T, CODE1, CODE2)	(T)
#define EXPR_CHECK(T)				(T)
#define NON_TYPE_CHECK(T)			(T)
#define TREE_VEC_ELT_CHECK(T, I)		((T)->vec.a[I])
#define TREE_OPERAND_CHECK(T, I)		((T)->exp.operands[I])
#define TREE_OPERAND_CHECK_CODE(T, CODE, I)	((T)->exp.operands[I])
#define TREE_RTL_OPERAND_CHECK(T, CODE, I)  (*(rtx *) &((T)->exp.operands[I]))
#define PHI_NODE_ELT_CHECK(T, i)	((T)->phi.a[i])
#define OMP_CLAUSE_ELT_CHECK(T, i)	        ((T)->omp_clause.ops[i])
#define OMP_CLAUSE_RANGE_CHECK(T, CODE1, CODE2)	(T)
#define OMP_CLAUSE_SUBCODE_CHECK(T, CODE)	(T)

#endif

#define TREE_BLOCK(NODE)		(EXPR_CHECK (NODE)->exp.block)

#include "tree-check.h"

#define TYPE_CHECK(T)		TREE_CLASS_CHECK (T, tcc_type)
#define DECL_MINIMAL_CHECK(T)   CONTAINS_STRUCT_CHECK (T, TS_DECL_MINIMAL)
#define TREE_MEMORY_TAG_CHECK(T)       CONTAINS_STRUCT_CHECK (T, TS_MEMORY_TAG)
#define DECL_COMMON_CHECK(T)    CONTAINS_STRUCT_CHECK (T, TS_DECL_COMMON)
#define DECL_WRTL_CHECK(T)      CONTAINS_STRUCT_CHECK (T, TS_DECL_WRTL)
#define DECL_WITH_VIS_CHECK(T)  CONTAINS_STRUCT_CHECK (T, TS_DECL_WITH_VIS)
#define DECL_NON_COMMON_CHECK(T) CONTAINS_STRUCT_CHECK (T, TS_DECL_NON_COMMON)
#define CST_CHECK(T)		TREE_CLASS_CHECK (T, tcc_constant)
#define STMT_CHECK(T)		TREE_CLASS_CHECK (T, tcc_statement)
#define FUNC_OR_METHOD_CHECK(T)	TREE_CHECK2 (T, FUNCTION_TYPE, METHOD_TYPE)
#define PTR_OR_REF_CHECK(T)	TREE_CHECK2 (T, POINTER_TYPE, REFERENCE_TYPE)

#define RECORD_OR_UNION_CHECK(T)	\
  TREE_CHECK3 (T, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE)
#define NOT_RECORD_OR_UNION_CHECK(T) \
  TREE_NOT_CHECK3 (T, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE)

#define NUMERICAL_TYPE_CHECK(T)					\
  TREE_CHECK4 (T, INTEGER_TYPE, ENUMERAL_TYPE, BOOLEAN_TYPE, REAL_TYPE)

/* In all nodes that are expressions, this is the data type of the expression.
   In POINTER_TYPE nodes, this is the type that the pointer points to.
   In ARRAY_TYPE nodes, this is the type of the elements.
   In VECTOR_TYPE nodes, this is the type of the elements.  */
#define TREE_TYPE(NODE) ((NODE)->common.type)

/* Here is how primitive or already-canonicalized types' hash codes
   are made.  */
#define TYPE_HASH(TYPE) (TYPE_UID (TYPE))

/* A simple hash function for an arbitrary tree node.  This must not be
   used in hash tables which are saved to a PCH.  */
#define TREE_HASH(NODE) ((size_t) (NODE) & 0777777)

/* Nodes are chained together for many purposes.
   Types are chained together to record them for being output to the debugger
   (see the function `chain_type').
   Decls in the same scope are chained together to record the contents
   of the scope.
   Statement nodes for successive statements used to be chained together.
   Often lists of things are represented by TREE_LIST nodes that
   are chained together.  */

#define TREE_CHAIN(NODE) ((NODE)->common.chain)

/* Given an expression as a tree, strip any NON_LVALUE_EXPRs and NOP_EXPRs
   that don't change the machine mode.  */

#define STRIP_NOPS(EXP)						\
  while ((TREE_CODE (EXP) == NOP_EXPR				\
	  || TREE_CODE (EXP) == CONVERT_EXPR			\
	  || TREE_CODE (EXP) == NON_LVALUE_EXPR)		\
	 && TREE_OPERAND (EXP, 0) != error_mark_node		\
	 && (TYPE_MODE (TREE_TYPE (EXP))			\
	     == TYPE_MODE (TREE_TYPE (TREE_OPERAND (EXP, 0)))))	\
    (EXP) = TREE_OPERAND (EXP, 0)

/* Like STRIP_NOPS, but don't let the signedness change either.  */

#define STRIP_SIGN_NOPS(EXP) \
  while ((TREE_CODE (EXP) == NOP_EXPR				\
	  || TREE_CODE (EXP) == CONVERT_EXPR			\
	  || TREE_CODE (EXP) == NON_LVALUE_EXPR)		\
	 && TREE_OPERAND (EXP, 0) != error_mark_node		\
	 && (TYPE_MODE (TREE_TYPE (EXP))			\
	     == TYPE_MODE (TREE_TYPE (TREE_OPERAND (EXP, 0))))	\
	 && (TYPE_UNSIGNED (TREE_TYPE (EXP))			\
	     == TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (EXP, 0))))) \
    (EXP) = TREE_OPERAND (EXP, 0)

/* Like STRIP_NOPS, but don't alter the TREE_TYPE either.  */

#define STRIP_TYPE_NOPS(EXP) \
  while ((TREE_CODE (EXP) == NOP_EXPR				\
	  || TREE_CODE (EXP) == CONVERT_EXPR			\
	  || TREE_CODE (EXP) == NON_LVALUE_EXPR)		\
	 && TREE_OPERAND (EXP, 0) != error_mark_node		\
	 && (TREE_TYPE (EXP)					\
	     == TREE_TYPE (TREE_OPERAND (EXP, 0))))		\
    (EXP) = TREE_OPERAND (EXP, 0)

/* Remove unnecessary type conversions according to
   tree_ssa_useless_type_conversion.  */

#define STRIP_USELESS_TYPE_CONVERSION(EXP)				\
      while (tree_ssa_useless_type_conversion (EXP))			\
	EXP = TREE_OPERAND (EXP, 0)

/* Nonzero if TYPE represents an integral type.  Note that we do not
   include COMPLEX types here.  Keep these checks in ascending code
   order.  */

#define INTEGRAL_TYPE_P(TYPE)  \
  (TREE_CODE (TYPE) == ENUMERAL_TYPE  \
   || TREE_CODE (TYPE) == BOOLEAN_TYPE \
   || TREE_CODE (TYPE) == INTEGER_TYPE)

/* Nonzero if TYPE represents a scalar floating-point type.  */

#define SCALAR_FLOAT_TYPE_P(TYPE) (TREE_CODE (TYPE) == REAL_TYPE)

/* Nonzero if TYPE represents a complex floating-point type.  */

#define COMPLEX_FLOAT_TYPE_P(TYPE)	\
  (TREE_CODE (TYPE) == COMPLEX_TYPE	\
   && TREE_CODE (TREE_TYPE (TYPE)) == REAL_TYPE)

/* Nonzero if TYPE represents a vector floating-point type.  */

#define VECTOR_FLOAT_TYPE_P(TYPE)	\
  (TREE_CODE (TYPE) == VECTOR_TYPE	\
   && TREE_CODE (TREE_TYPE (TYPE)) == REAL_TYPE)

/* Nonzero if TYPE represents a floating-point type, including complex
   and vector floating-point types.  The vector and complex check does
   not use the previous two macros to enable early folding.  */

#define FLOAT_TYPE_P(TYPE)			\
  (SCALAR_FLOAT_TYPE_P (TYPE)			\
   || ((TREE_CODE (TYPE) == COMPLEX_TYPE 	\
        || TREE_CODE (TYPE) == VECTOR_TYPE)	\
       && SCALAR_FLOAT_TYPE_P (TREE_TYPE (TYPE))))

/* Nonzero if TYPE represents an aggregate (multi-component) type.
   Keep these checks in ascending code order.  */

#define AGGREGATE_TYPE_P(TYPE) \
  (TREE_CODE (TYPE) == ARRAY_TYPE || TREE_CODE (TYPE) == RECORD_TYPE \
   || TREE_CODE (TYPE) == UNION_TYPE || TREE_CODE (TYPE) == QUAL_UNION_TYPE)

/* Nonzero if TYPE represents a pointer or reference type.
   (It should be renamed to INDIRECT_TYPE_P.)  Keep these checks in
   ascending code order.  */

#define POINTER_TYPE_P(TYPE) \
  (TREE_CODE (TYPE) == POINTER_TYPE || TREE_CODE (TYPE) == REFERENCE_TYPE)

/* Nonzero if this type is a complete type.  */
#define COMPLETE_TYPE_P(NODE) (TYPE_SIZE (NODE) != NULL_TREE)

/* Nonzero if this type is the (possibly qualified) void type.  */
#define VOID_TYPE_P(NODE) (TREE_CODE (NODE) == VOID_TYPE)

/* Nonzero if this type is complete or is cv void.  */
#define COMPLETE_OR_VOID_TYPE_P(NODE) \
  (COMPLETE_TYPE_P (NODE) || VOID_TYPE_P (NODE))

/* Nonzero if this type is complete or is an array with unspecified bound.  */
#define COMPLETE_OR_UNBOUND_ARRAY_TYPE_P(NODE) \
  (COMPLETE_TYPE_P (TREE_CODE (NODE) == ARRAY_TYPE ? TREE_TYPE (NODE) : (NODE)))


/* Define many boolean fields that all tree nodes have.  */

/* In VAR_DECL nodes, nonzero means address of this is needed.
   So it cannot be in a register.
   In a FUNCTION_DECL, nonzero means its address is needed.
   So it must be compiled even if it is an inline function.
   In a FIELD_DECL node, it means that the programmer is permitted to
   construct the address of this field.  This is used for aliasing
   purposes: see record_component_aliases.
   In CONSTRUCTOR nodes, it means object constructed must be in memory.
   In LABEL_DECL nodes, it means a goto for this label has been seen
   from a place outside all binding contours that restore stack levels.
   In ..._TYPE nodes, it means that objects of this type must
   be fully addressable.  This means that pieces of this
   object cannot go into register parameters, for example.
   In IDENTIFIER_NODEs, this means that some extern decl for this name
   had its address taken.  That matters for inline functions.  */
#define TREE_ADDRESSABLE(NODE) ((NODE)->common.addressable_flag)

/* Set on a CALL_EXPR if the call is in a tail position, ie. just before the
   exit of a function.  Calls for which this is true are candidates for tail
   call optimizations.  */
#define CALL_EXPR_TAILCALL(NODE) (CALL_EXPR_CHECK(NODE)->common.addressable_flag)

/* In a VAR_DECL, nonzero means allocate static storage.
   In a FUNCTION_DECL, nonzero if function has been defined.
   In a CONSTRUCTOR, nonzero means allocate static storage.

   ??? This is also used in lots of other nodes in unclear ways which
   should be cleaned up some day.  */
#define TREE_STATIC(NODE) ((NODE)->common.static_flag)

/* In a TARGET_EXPR, WITH_CLEANUP_EXPR, means that the pertinent cleanup
   should only be executed if an exception is thrown, not on normal exit
   of its scope.  */
#define CLEANUP_EH_ONLY(NODE) ((NODE)->common.static_flag)

/* In an expr node (usually a conversion) this means the node was made
   implicitly and should not lead to any sort of warning.  In a decl node,
   warnings concerning the decl should be suppressed.  This is used at
   least for used-before-set warnings, and it set after one warning is
   emitted.  */
#define TREE_NO_WARNING(NODE) ((NODE)->common.nowarning_flag)

/* In an INTEGER_CST, REAL_CST, COMPLEX_CST, or VECTOR_CST this means
   there was an overflow in folding.  This is distinct from
   TREE_OVERFLOW because ANSI C requires a diagnostic when overflows
   occur in constant expressions.  */
#define TREE_CONSTANT_OVERFLOW(NODE) (CST_CHECK (NODE)->common.static_flag)

/* In an IDENTIFIER_NODE, this means that assemble_name was called with
   this string as an argument.  */
#define TREE_SYMBOL_REFERENCED(NODE) \
  (IDENTIFIER_NODE_CHECK (NODE)->common.static_flag)

/* Nonzero in a pointer or reference type means the data pointed to
   by this type can alias anything.  */
#define TYPE_REF_CAN_ALIAS_ALL(NODE) \
  (PTR_OR_REF_CHECK (NODE)->common.static_flag)

/* In an INTEGER_CST, REAL_CST, COMPLEX_CST, or VECTOR_CST, this means
   there was an overflow in folding, and no warning has been issued
   for this subexpression.  TREE_OVERFLOW implies TREE_CONSTANT_OVERFLOW,
   but not vice versa.  */

#define TREE_OVERFLOW(NODE) (CST_CHECK (NODE)->common.public_flag)

/* In a VAR_DECL or FUNCTION_DECL,
   nonzero means name is to be accessible from outside this module.
   In an IDENTIFIER_NODE, nonzero means an external declaration
   accessible from outside this module was previously seen
   for this name in an inner scope.  */
#define TREE_PUBLIC(NODE) ((NODE)->common.public_flag)

/* In a _TYPE, indicates whether TYPE_CACHED_VALUES contains a vector
   of cached values, or is something else.  */
#define TYPE_CACHED_VALUES_P(NODE) (TYPE_CHECK(NODE)->common.public_flag)

/* In a SAVE_EXPR, indicates that the original expression has already
   been substituted with a VAR_DECL that contains the value.  */
#define SAVE_EXPR_RESOLVED_P(NODE) \
  (TREE_CHECK (NODE, SAVE_EXPR)->common.public_flag)

/* In any expression, decl, or constant, nonzero means it has side effects or
   reevaluation of the whole expression could produce a different value.
   This is set if any subexpression is a function call, a side effect or a
   reference to a volatile variable.  In a ..._DECL, this is set only if the
   declaration said `volatile'.  This will never be set for a constant.  */
#define TREE_SIDE_EFFECTS(NODE) \
  (NON_TYPE_CHECK (NODE)->common.side_effects_flag)

/* In a LABEL_DECL, nonzero means this label had its address taken
   and therefore can never be deleted and is a jump target for
   computed gotos.  */
#define FORCED_LABEL(NODE) ((NODE)->common.side_effects_flag)

/* Nonzero means this expression is volatile in the C sense:
   its address should be of type `volatile WHATEVER *'.
   In other words, the declared item is volatile qualified.
   This is used in _DECL nodes and _REF nodes.
   On a FUNCTION_DECL node, this means the function does not
   return normally.  This is the same effect as setting
   the attribute noreturn on the function in C.

   In a ..._TYPE node, means this type is volatile-qualified.
   But use TYPE_VOLATILE instead of this macro when the node is a type,
   because eventually we may make that a different bit.

   If this bit is set in an expression, so is TREE_SIDE_EFFECTS.  */
#define TREE_THIS_VOLATILE(NODE) ((NODE)->common.volatile_flag)

/* Nonzero means this node will not trap.  In an INDIRECT_REF, means
   accessing the memory pointed to won't generate a trap.  However,
   this only applies to an object when used appropriately: it doesn't
   mean that writing a READONLY mem won't trap. Similarly for
   ALIGN_INDIRECT_REF and MISALIGNED_INDIRECT_REF.

   In ARRAY_REF and ARRAY_RANGE_REF means that we know that the index
   (or slice of the array) always belongs to the range of the array.
   I.e. that the access will not trap, provided that the access to
   the base to the array will not trap.  */
#define TREE_THIS_NOTRAP(NODE) ((NODE)->common.nothrow_flag)

/* In a VAR_DECL, PARM_DECL or FIELD_DECL, or any kind of ..._REF node,
   nonzero means it may not be the lhs of an assignment.  */
#define TREE_READONLY(NODE) (NON_TYPE_CHECK (NODE)->common.readonly_flag)

/* Nonzero if NODE is a _DECL with TREE_READONLY set.  */
#define TREE_READONLY_DECL_P(NODE)\
	(DECL_P (NODE) && TREE_READONLY (NODE))

/* Value of expression is constant.  Always on in all ..._CST nodes.  May
   also appear in an expression or decl where the value is constant.  */
#define TREE_CONSTANT(NODE) (NON_TYPE_CHECK (NODE)->common.constant_flag)

/* Nonzero if NODE, a type, has had its sizes gimplified.  */
#define TYPE_SIZES_GIMPLIFIED(NODE) (TYPE_CHECK (NODE)->common.constant_flag)

/* In a decl (most significantly a FIELD_DECL), means an unsigned field.  */
#define DECL_UNSIGNED(NODE) (DECL_COMMON_CHECK (NODE)->common.unsigned_flag)

/* In a BIT_FIELD_REF, means the bitfield is to be interpreted as unsigned.  */
#define BIT_FIELD_REF_UNSIGNED(NODE) \
  (BIT_FIELD_REF_CHECK (NODE)->common.unsigned_flag)

/* In integral and pointer types, means an unsigned type.  */
#define TYPE_UNSIGNED(NODE) (TYPE_CHECK (NODE)->common.unsigned_flag)

#define TYPE_TRAP_SIGNED(NODE) \
  (flag_trapv && ! TYPE_UNSIGNED (NODE))

/* Nonzero in a VAR_DECL means assembler code has been written.
   Nonzero in a FUNCTION_DECL means that the function has been compiled.
   This is interesting in an inline function, since it might not need
   to be compiled separately.
   Nonzero in a RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE or ENUMERAL_TYPE
   if the sdb debugging info for the type has been written.
   In a BLOCK node, nonzero if reorder_blocks has already seen this block.
   In an SSA_NAME node, nonzero if the SSA_NAME occurs in an abnormal
   PHI node.  */
#define TREE_ASM_WRITTEN(NODE) ((NODE)->common.asm_written_flag)

/* Nonzero in a _DECL if the name is used in its scope.
   Nonzero in an expr node means inhibit warning if value is unused.
   In IDENTIFIER_NODEs, this means that some extern decl for this name
   was used.  
   In a BLOCK, this means that the block contains variables that are used.  */
#define TREE_USED(NODE) ((NODE)->common.used_flag)

/* In a FUNCTION_DECL, nonzero means a call to the function cannot throw
   an exception.  In a CALL_EXPR, nonzero means the call cannot throw.  */
#define TREE_NOTHROW(NODE) ((NODE)->common.nothrow_flag)

/* In a CALL_EXPR, means that it's safe to use the target of the call
   expansion as the return slot for a call that returns in memory.  */
#define CALL_EXPR_RETURN_SLOT_OPT(NODE) ((NODE)->common.private_flag)

/* In a RESULT_DECL or PARM_DECL, means that it is passed by invisible
   reference (and the TREE_TYPE is a pointer to the true type).  */
#define DECL_BY_REFERENCE(NODE) (DECL_COMMON_CHECK (NODE)->common.private_flag)

/* In a CALL_EXPR, means that the call is the jump from a thunk to the
   thunked-to function.  */
#define CALL_FROM_THUNK_P(NODE) (CALL_EXPR_CHECK (NODE)->common.protected_flag)

/* In a type, nonzero means that all objects of the type are guaranteed by the
   language or front-end to be properly aligned, so we can indicate that a MEM
   of this type is aligned at least to the alignment of the type, even if it
   doesn't appear that it is.  We see this, for example, in object-oriented
   languages where a tag field may show this is an object of a more-aligned
   variant of the more generic type.

   In an SSA_NAME node, nonzero if the SSA_NAME node is on the SSA_NAME
   freelist.  */
#define TYPE_ALIGN_OK(NODE) (TYPE_CHECK (NODE)->common.nothrow_flag)

/* Used in classes in C++.  */
#define TREE_PRIVATE(NODE) ((NODE)->common.private_flag)
/* Used in classes in C++.
   In a BLOCK node, this is BLOCK_HANDLER_BLOCK.  */
#define TREE_PROTECTED(NODE) ((NODE)->common.protected_flag)

/* Nonzero in a _DECL if the use of the name is defined as a
   deprecated feature by __attribute__((deprecated)).  */
#define TREE_DEPRECATED(NODE) \
  ((NODE)->common.deprecated_flag)

/* Nonzero in an IDENTIFIER_NODE if the name is a local alias, whose
   uses are to be substituted for uses of the TREE_CHAINed identifier.  */
#define IDENTIFIER_TRANSPARENT_ALIAS(NODE) \
  (IDENTIFIER_NODE_CHECK (NODE)->common.deprecated_flag)

/* Value of expression is function invariant.  A strict subset of
   TREE_CONSTANT, such an expression is constant over any one function
   invocation, though not across different invocations.  May appear in
   any expression node.  */
#define TREE_INVARIANT(NODE) ((NODE)->common.invariant_flag)

/* These flags are available for each language front end to use internally.  */
#define TREE_LANG_FLAG_0(NODE) ((NODE)->common.lang_flag_0)
#define TREE_LANG_FLAG_1(NODE) ((NODE)->common.lang_flag_1)
#define TREE_LANG_FLAG_2(NODE) ((NODE)->common.lang_flag_2)
#define TREE_LANG_FLAG_3(NODE) ((NODE)->common.lang_flag_3)
#define TREE_LANG_FLAG_4(NODE) ((NODE)->common.lang_flag_4)
#define TREE_LANG_FLAG_5(NODE) ((NODE)->common.lang_flag_5)
#define TREE_LANG_FLAG_6(NODE) ((NODE)->common.lang_flag_6)

/* Define additional fields and accessors for nodes representing constants.  */

/* In an INTEGER_CST node.  These two together make a 2-word integer.
   If the data type is signed, the value is sign-extended to 2 words
   even though not all of them may really be in use.
   In an unsigned constant shorter than 2 words, the extra bits are 0.  */
#define TREE_INT_CST(NODE) (INTEGER_CST_CHECK (NODE)->int_cst.int_cst)
#define TREE_INT_CST_LOW(NODE) (TREE_INT_CST (NODE).low)
#define TREE_INT_CST_HIGH(NODE) (TREE_INT_CST (NODE).high)

#define INT_CST_LT(A, B)				\
  (TREE_INT_CST_HIGH (A) < TREE_INT_CST_HIGH (B)	\
   || (TREE_INT_CST_HIGH (A) == TREE_INT_CST_HIGH (B)	\
       && TREE_INT_CST_LOW (A) < TREE_INT_CST_LOW (B)))

#define INT_CST_LT_UNSIGNED(A, B)				\
  (((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (A)		\
    < (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (B))		\
   || (((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (A)		\
	== (unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (B))	\
       && TREE_INT_CST_LOW (A) < TREE_INT_CST_LOW (B)))

struct tree_int_cst GTY(())
{
  struct tree_common common;
  double_int int_cst;
};

/* In a REAL_CST node.  struct real_value is an opaque entity, with
   manipulators defined in real.h.  We don't want tree.h depending on
   real.h and transitively on tm.h.  */
struct real_value;

#define TREE_REAL_CST_PTR(NODE) (REAL_CST_CHECK (NODE)->real_cst.real_cst_ptr)
#define TREE_REAL_CST(NODE) (*TREE_REAL_CST_PTR (NODE))

struct tree_real_cst GTY(())
{
  struct tree_common common;
  struct real_value * real_cst_ptr;
};

/* In a STRING_CST */
#define TREE_STRING_LENGTH(NODE) (STRING_CST_CHECK (NODE)->string.length)
#define TREE_STRING_POINTER(NODE) \
  ((const char *)(STRING_CST_CHECK (NODE)->string.str))

struct tree_string GTY(())
{
  struct tree_common common;
  int length;
  char str[1];
};

/* In a COMPLEX_CST node.  */
#define TREE_REALPART(NODE) (COMPLEX_CST_CHECK (NODE)->complex.real)
#define TREE_IMAGPART(NODE) (COMPLEX_CST_CHECK (NODE)->complex.imag)

struct tree_complex GTY(())
{
  struct tree_common common;
  tree real;
  tree imag;
};

/* In a VECTOR_CST node.  */
#define TREE_VECTOR_CST_ELTS(NODE) (VECTOR_CST_CHECK (NODE)->vector.elements)

struct tree_vector GTY(())
{
  struct tree_common common;
  tree elements;
};

#include "symtab.h"

/* Define fields and accessors for some special-purpose tree nodes.  */

#define IDENTIFIER_LENGTH(NODE) \
  (IDENTIFIER_NODE_CHECK (NODE)->identifier.id.len)
#define IDENTIFIER_POINTER(NODE) \
  ((const char *) IDENTIFIER_NODE_CHECK (NODE)->identifier.id.str)
#define IDENTIFIER_HASH_VALUE(NODE) \
  (IDENTIFIER_NODE_CHECK (NODE)->identifier.id.hash_value)

/* Translate a hash table identifier pointer to a tree_identifier
   pointer, and vice versa.  */

#define HT_IDENT_TO_GCC_IDENT(NODE) \
  ((tree) ((char *) (NODE) - sizeof (struct tree_common)))
#define GCC_IDENT_TO_HT_IDENT(NODE) (&((struct tree_identifier *) (NODE))->id)

struct tree_identifier GTY(())
{
  struct tree_common common;
  struct ht_identifier id;
};

/* In a TREE_LIST node.  */
#define TREE_PURPOSE(NODE) (TREE_LIST_CHECK (NODE)->list.purpose)
#define TREE_VALUE(NODE) (TREE_LIST_CHECK (NODE)->list.value)

struct tree_list GTY(())
{
  struct tree_common common;
  tree purpose;
  tree value;
};

/* In a TREE_VEC node.  */
#define TREE_VEC_LENGTH(NODE) (TREE_VEC_CHECK (NODE)->vec.length)
#define TREE_VEC_END(NODE) \
  ((void) TREE_VEC_CHECK (NODE), &((NODE)->vec.a[(NODE)->vec.length]))

#define TREE_VEC_ELT(NODE,I) TREE_VEC_ELT_CHECK (NODE, I)

struct tree_vec GTY(())
{
  struct tree_common common;
  int length;
  tree GTY ((length ("TREE_VEC_LENGTH ((tree)&%h)"))) a[1];
};

/* In a CONSTRUCTOR node.  */
#define CONSTRUCTOR_ELTS(NODE) (CONSTRUCTOR_CHECK (NODE)->constructor.elts)

/* Iterate through the vector V of CONSTRUCTOR_ELT elements, yielding the
   value of each element (stored within VAL). IX must be a scratch variable
   of unsigned integer type.  */
#define FOR_EACH_CONSTRUCTOR_VALUE(V, IX, VAL) \
  for (IX = 0; (IX >= VEC_length (constructor_elt, V)) \
	       ? false \
	       : ((VAL = VEC_index (constructor_elt, V, IX)->value), \
	       true); \
       (IX)++)

/* Iterate through the vector V of CONSTRUCTOR_ELT elements, yielding both
   the value of each element (stored within VAL) and its index (stored
   within INDEX). IX must be a scratch variable of unsigned integer type.  */
#define FOR_EACH_CONSTRUCTOR_ELT(V, IX, INDEX, VAL) \
  for (IX = 0; (IX >= VEC_length (constructor_elt, V)) \
	       ? false \
	       : ((VAL = VEC_index (constructor_elt, V, IX)->value), \
		  (INDEX = VEC_index (constructor_elt, V, IX)->index), \
	       true); \
       (IX)++)

/* Append a new constructor element to V, with the specified INDEX and VAL.  */
#define CONSTRUCTOR_APPEND_ELT(V, INDEX, VALUE) \
  do { \
    constructor_elt *_ce___ = VEC_safe_push (constructor_elt, gc, V, NULL); \
    _ce___->index = INDEX; \
    _ce___->value = VALUE; \
  } while (0)

/* A single element of a CONSTRUCTOR. VALUE holds the actual value of the
   element. INDEX can optionally design the position of VALUE: in arrays,
   it is the index where VALUE has to be placed; in structures, it is the
   FIELD_DECL of the member.  */
typedef struct constructor_elt_d GTY(())
{
  tree index;
  tree value;
} constructor_elt;

DEF_VEC_O(constructor_elt);
DEF_VEC_ALLOC_O(constructor_elt,gc);

struct tree_constructor GTY(())
{
  struct tree_common common;
  VEC(constructor_elt,gc) *elts;
};

/* Define fields and accessors for some nodes that represent expressions.  */

/* Nonzero if NODE is an empty statement (NOP_EXPR <0>).  */
#define IS_EMPTY_STMT(NODE)	(TREE_CODE (NODE) == NOP_EXPR \
				 && VOID_TYPE_P (TREE_TYPE (NODE)) \
				 && integer_zerop (TREE_OPERAND (NODE, 0)))

/* In ordinary expression nodes.  */
#define TREE_OPERAND(NODE, I) TREE_OPERAND_CHECK (NODE, I)
#define TREE_COMPLEXITY(NODE) (EXPR_CHECK (NODE)->exp.complexity)

/* In a LOOP_EXPR node.  */
#define LOOP_EXPR_BODY(NODE) TREE_OPERAND_CHECK_CODE (NODE, LOOP_EXPR, 0)

#ifdef USE_MAPPED_LOCATION
/* The source location of this expression.  Non-tree_exp nodes such as
   decls and constants can be shared among multiple locations, so
   return nothing.  */
#define EXPR_LOCATION(NODE)					\
  (EXPR_P (NODE) ? (NODE)->exp.locus : UNKNOWN_LOCATION)
#define SET_EXPR_LOCATION(NODE, FROM) \
  (EXPR_CHECK (NODE)->exp.locus = (FROM))
#define EXPR_HAS_LOCATION(NODE) (EXPR_LOCATION (NODE) != UNKNOWN_LOCATION)
/* EXPR_LOCUS and SET_EXPR_LOCUS are deprecated.  */
#define EXPR_LOCUS(NODE)					\
  (EXPR_P (NODE) ? &(NODE)->exp.locus : (location_t *)NULL)
#define SET_EXPR_LOCUS(NODE, FROM) \
  do { source_location *loc_tmp = FROM; \
       EXPR_CHECK (NODE)->exp.locus \
       = loc_tmp == NULL ? UNKNOWN_LOCATION : *loc_tmp; } while (0)
#define EXPR_FILENAME(NODE) \
  LOCATION_FILE (EXPR_CHECK (NODE)->exp.locus)
#define EXPR_LINENO(NODE) \
  LOCATION_LINE (EXPR_CHECK (NODE)->exp.locus)
#else
/* The source location of this expression.  Non-tree_exp nodes such as
   decls and constants can be shared among multiple locations, so
   return nothing.  */
#define EXPR_LOCUS(NODE)					\
  (EXPR_P (NODE) ? (NODE)->exp.locus : (location_t *)NULL)
#define SET_EXPR_LOCUS(NODE, FROM) \
  (EXPR_CHECK (NODE)->exp.locus = (FROM))
#define SET_EXPR_LOCATION(NODE, FROM) annotate_with_locus (NODE, FROM)
#define EXPR_FILENAME(NODE) \
  (EXPR_CHECK (NODE)->exp.locus->file)
#define EXPR_LINENO(NODE) \
  (EXPR_CHECK (NODE)->exp.locus->line)
#define EXPR_HAS_LOCATION(NODE) (EXPR_LOCUS (NODE) != NULL)
#define EXPR_LOCATION(NODE) \
  (EXPR_HAS_LOCATION(NODE) ? *(NODE)->exp.locus : UNKNOWN_LOCATION)
#endif

/* In a TARGET_EXPR node.  */
#define TARGET_EXPR_SLOT(NODE) TREE_OPERAND_CHECK_CODE (NODE, TARGET_EXPR, 0)
#define TARGET_EXPR_INITIAL(NODE) TREE_OPERAND_CHECK_CODE (NODE, TARGET_EXPR, 1)
#define TARGET_EXPR_CLEANUP(NODE) TREE_OPERAND_CHECK_CODE (NODE, TARGET_EXPR, 2)

/* DECL_EXPR accessor. This gives access to the DECL associated with
   the given declaration statement.  */
#define DECL_EXPR_DECL(NODE)    TREE_OPERAND (DECL_EXPR_CHECK (NODE), 0)

#define EXIT_EXPR_COND(NODE)	     TREE_OPERAND (EXIT_EXPR_CHECK (NODE), 0)

/* SWITCH_EXPR accessors. These give access to the condition, body and
   original condition type (before any compiler conversions)
   of the switch statement, respectively.  */
#define SWITCH_COND(NODE)       TREE_OPERAND (SWITCH_EXPR_CHECK (NODE), 0)
#define SWITCH_BODY(NODE)       TREE_OPERAND (SWITCH_EXPR_CHECK (NODE), 1)
#define SWITCH_LABELS(NODE)     TREE_OPERAND (SWITCH_EXPR_CHECK (NODE), 2)

/* CASE_LABEL_EXPR accessors. These give access to the high and low values
   of a case label, respectively.  */
#define CASE_LOW(NODE)          	TREE_OPERAND (CASE_LABEL_EXPR_CHECK (NODE), 0)
#define CASE_HIGH(NODE)         	TREE_OPERAND (CASE_LABEL_EXPR_CHECK (NODE), 1)
#define CASE_LABEL(NODE)		TREE_OPERAND (CASE_LABEL_EXPR_CHECK (NODE), 2)

/* The operands of a TARGET_MEM_REF.  */
#define TMR_SYMBOL(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 0))
#define TMR_BASE(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 1))
#define TMR_INDEX(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 2))
#define TMR_STEP(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 3))
#define TMR_OFFSET(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 4))
#define TMR_ORIGINAL(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 5))
#define TMR_TAG(NODE) (TREE_OPERAND (TARGET_MEM_REF_CHECK (NODE), 6))

/* The operands of a BIND_EXPR.  */
#define BIND_EXPR_VARS(NODE) (TREE_OPERAND (BIND_EXPR_CHECK (NODE), 0))
#define BIND_EXPR_BODY(NODE) (TREE_OPERAND (BIND_EXPR_CHECK (NODE), 1))
#define BIND_EXPR_BLOCK(NODE) (TREE_OPERAND (BIND_EXPR_CHECK (NODE), 2))

/* GOTO_EXPR accessor. This gives access to the label associated with
   a goto statement.  */
#define GOTO_DESTINATION(NODE)  TREE_OPERAND ((NODE), 0)

/* ASM_EXPR accessors. ASM_STRING returns a STRING_CST for the
   instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
   ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
   statement.  */
#define ASM_STRING(NODE)        TREE_OPERAND (ASM_EXPR_CHECK (NODE), 0)
#define ASM_OUTPUTS(NODE)       TREE_OPERAND (ASM_EXPR_CHECK (NODE), 1)
#define ASM_INPUTS(NODE)        TREE_OPERAND (ASM_EXPR_CHECK (NODE), 2)
#define ASM_CLOBBERS(NODE)      TREE_OPERAND (ASM_EXPR_CHECK (NODE), 3)
/* Nonzero if we want to create an ASM_INPUT instead of an
   ASM_OPERAND with no operands.  */
#define ASM_INPUT_P(NODE) (TREE_STATIC (NODE))
#define ASM_VOLATILE_P(NODE) (TREE_PUBLIC (NODE))

/* COND_EXPR accessors.  */
#define COND_EXPR_COND(NODE)	(TREE_OPERAND (COND_EXPR_CHECK (NODE), 0))
#define COND_EXPR_THEN(NODE)	(TREE_OPERAND (COND_EXPR_CHECK (NODE), 1))
#define COND_EXPR_ELSE(NODE)	(TREE_OPERAND (COND_EXPR_CHECK (NODE), 2))

/* LABEL_EXPR accessor. This gives access to the label associated with
   the given label expression.  */
#define LABEL_EXPR_LABEL(NODE)  TREE_OPERAND (LABEL_EXPR_CHECK (NODE), 0)

/* VDEF_EXPR accessors are specified in tree-flow.h, along with the other
   accessors for SSA operands.  */

/* CATCH_EXPR accessors.  */
#define CATCH_TYPES(NODE)	TREE_OPERAND (CATCH_EXPR_CHECK (NODE), 0)
#define CATCH_BODY(NODE)	TREE_OPERAND (CATCH_EXPR_CHECK (NODE), 1)

/* EH_FILTER_EXPR accessors.  */
#define EH_FILTER_TYPES(NODE)	TREE_OPERAND (EH_FILTER_EXPR_CHECK (NODE), 0)
#define EH_FILTER_FAILURE(NODE)	TREE_OPERAND (EH_FILTER_EXPR_CHECK (NODE), 1)
#define EH_FILTER_MUST_NOT_THROW(NODE) TREE_STATIC (EH_FILTER_EXPR_CHECK (NODE))

/* OBJ_TYPE_REF accessors.  */
#define OBJ_TYPE_REF_EXPR(NODE)	  TREE_OPERAND (OBJ_TYPE_REF_CHECK (NODE), 0)
#define OBJ_TYPE_REF_OBJECT(NODE) TREE_OPERAND (OBJ_TYPE_REF_CHECK (NODE), 1)
#define OBJ_TYPE_REF_TOKEN(NODE)  TREE_OPERAND (OBJ_TYPE_REF_CHECK (NODE), 2)

/* ASSERT_EXPR accessors.  */
#define ASSERT_EXPR_VAR(NODE)	TREE_OPERAND (ASSERT_EXPR_CHECK (NODE), 0)
#define ASSERT_EXPR_COND(NODE)	TREE_OPERAND (ASSERT_EXPR_CHECK (NODE), 1)

/* OpenMP directive and clause accessors.  */

#define OMP_BODY(NODE) \
  TREE_OPERAND (TREE_RANGE_CHECK (NODE, OMP_PARALLEL, OMP_CRITICAL), 0)
#define OMP_CLAUSES(NODE) \
  TREE_OPERAND (TREE_RANGE_CHECK (NODE, OMP_PARALLEL, OMP_SINGLE), 1)

#define OMP_PARALLEL_BODY(NODE)    TREE_OPERAND (OMP_PARALLEL_CHECK (NODE), 0)
#define OMP_PARALLEL_CLAUSES(NODE) TREE_OPERAND (OMP_PARALLEL_CHECK (NODE), 1)
#define OMP_PARALLEL_FN(NODE) TREE_OPERAND (OMP_PARALLEL_CHECK (NODE), 2)
#define OMP_PARALLEL_DATA_ARG(NODE) TREE_OPERAND (OMP_PARALLEL_CHECK (NODE), 3)

#define OMP_FOR_BODY(NODE)	   TREE_OPERAND (OMP_FOR_CHECK (NODE), 0)
#define OMP_FOR_CLAUSES(NODE)	   TREE_OPERAND (OMP_FOR_CHECK (NODE), 1)
#define OMP_FOR_INIT(NODE)	   TREE_OPERAND (OMP_FOR_CHECK (NODE), 2)
#define OMP_FOR_COND(NODE)	   TREE_OPERAND (OMP_FOR_CHECK (NODE), 3)
#define OMP_FOR_INCR(NODE)	   TREE_OPERAND (OMP_FOR_CHECK (NODE), 4)
#define OMP_FOR_PRE_BODY(NODE)	   TREE_OPERAND (OMP_FOR_CHECK (NODE), 5)

#define OMP_SECTIONS_BODY(NODE)    TREE_OPERAND (OMP_SECTIONS_CHECK (NODE), 0)
#define OMP_SECTIONS_CLAUSES(NODE) TREE_OPERAND (OMP_SECTIONS_CHECK (NODE), 1)

#define OMP_SECTION_BODY(NODE)	   TREE_OPERAND (OMP_SECTION_CHECK (NODE), 0)

#define OMP_SINGLE_BODY(NODE)	   TREE_OPERAND (OMP_SINGLE_CHECK (NODE), 0)
#define OMP_SINGLE_CLAUSES(NODE)   TREE_OPERAND (OMP_SINGLE_CHECK (NODE), 1)

#define OMP_MASTER_BODY(NODE)	   TREE_OPERAND (OMP_MASTER_CHECK (NODE), 0)

#define OMP_ORDERED_BODY(NODE)	   TREE_OPERAND (OMP_ORDERED_CHECK (NODE), 0)

#define OMP_CRITICAL_BODY(NODE)    TREE_OPERAND (OMP_CRITICAL_CHECK (NODE), 0)
#define OMP_CRITICAL_NAME(NODE)    TREE_OPERAND (OMP_CRITICAL_CHECK (NODE), 1)

#define OMP_CLAUSE_CHAIN(NODE)     TREE_CHAIN (OMP_CLAUSE_CHECK (NODE))
#define OMP_CLAUSE_DECL(NODE)      					\
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_RANGE_CHECK (OMP_CLAUSE_CHECK (NODE),	\
					      OMP_CLAUSE_PRIVATE,	\
	                                      OMP_CLAUSE_COPYPRIVATE), 0)

/* True on an OMP_SECTION statement that was the last lexical member.
   This status is meaningful in the implementation of lastprivate.  */
#define OMP_SECTION_LAST(NODE) \
  TREE_PRIVATE (OMP_SECTION_CHECK (NODE))

/* True on an OMP_RETURN statement if the return does not require a
   thread synchronization via some sort of barrier.  The exact barrier
   that would otherwise be emitted is dependent on the OMP statement
   with which this return is associated.  */
#define OMP_RETURN_NOWAIT(NODE) \
  TREE_PRIVATE (OMP_RETURN_CHECK (NODE))

/* True on an OMP_PARALLEL statement if it represents an explicit
   combined parallel work-sharing constructs.  */
#define OMP_PARALLEL_COMBINED(NODE) \
  TREE_PRIVATE (OMP_PARALLEL_CHECK (NODE))

/* True on a PRIVATE clause if its decl is kept around for debugging
   information only and its DECL_VALUE_EXPR is supposed to point
   to what it has been remapped to.  */
#define OMP_CLAUSE_PRIVATE_DEBUG(NODE) \
  TREE_PUBLIC (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_PRIVATE))

/* True on a LASTPRIVATE clause if a FIRSTPRIVATE clause for the same
   decl is present in the chain.  */
#define OMP_CLAUSE_LASTPRIVATE_FIRSTPRIVATE(NODE) \
  TREE_PUBLIC (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_LASTPRIVATE))

#define OMP_CLAUSE_IF_EXPR(NODE) \
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_IF), 0)
#define OMP_CLAUSE_NUM_THREADS_EXPR(NODE) \
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_NUM_THREADS),0)
#define OMP_CLAUSE_SCHEDULE_CHUNK_EXPR(NODE) \
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_SCHEDULE), 0)

#define OMP_CLAUSE_REDUCTION_CODE(NODE)	\
  (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_REDUCTION)->omp_clause.subcode.reduction_code)
#define OMP_CLAUSE_REDUCTION_INIT(NODE) \
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_REDUCTION), 1)
#define OMP_CLAUSE_REDUCTION_MERGE(NODE) \
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_REDUCTION), 2)
#define OMP_CLAUSE_REDUCTION_PLACEHOLDER(NODE) \
  OMP_CLAUSE_OPERAND (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_REDUCTION), 3)

enum omp_clause_schedule_kind
{
  OMP_CLAUSE_SCHEDULE_STATIC,
  OMP_CLAUSE_SCHEDULE_DYNAMIC,
  OMP_CLAUSE_SCHEDULE_GUIDED,
  OMP_CLAUSE_SCHEDULE_RUNTIME
};

#define OMP_CLAUSE_SCHEDULE_KIND(NODE) \
  (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_SCHEDULE)->omp_clause.subcode.schedule_kind)

enum omp_clause_default_kind
{
  OMP_CLAUSE_DEFAULT_UNSPECIFIED,
  OMP_CLAUSE_DEFAULT_SHARED,
  OMP_CLAUSE_DEFAULT_NONE,
  OMP_CLAUSE_DEFAULT_PRIVATE
};

#define OMP_CLAUSE_DEFAULT_KIND(NODE) \
  (OMP_CLAUSE_SUBCODE_CHECK (NODE, OMP_CLAUSE_DEFAULT)->omp_clause.subcode.default_kind)

struct tree_exp GTY(())
{
  struct tree_common common;
  source_locus locus;
  int complexity;
  tree block;
  tree GTY ((special ("tree_exp"),
	     desc ("TREE_CODE ((tree) &%0)")))
    operands[1];
};

/* SSA_NAME accessors.  */

/* Returns the variable being referenced.  Once released, this is the
   only field that can be relied upon.  */
#define SSA_NAME_VAR(NODE)	SSA_NAME_CHECK (NODE)->ssa_name.var

/* Returns the statement which defines this reference.   Note that
   we use the same field when chaining SSA_NAME nodes together on
   the SSA_NAME freelist.  */
#define SSA_NAME_DEF_STMT(NODE)	SSA_NAME_CHECK (NODE)->common.chain

/* Returns the SSA version number of this SSA name.  Note that in
   tree SSA, version numbers are not per variable and may be recycled.  */
#define SSA_NAME_VERSION(NODE)	SSA_NAME_CHECK (NODE)->ssa_name.version

/* Nonzero if this SSA name occurs in an abnormal PHI.  SSA_NAMES are
   never output, so we can safely use the ASM_WRITTEN_FLAG for this
   status bit.  */
#define SSA_NAME_OCCURS_IN_ABNORMAL_PHI(NODE) \
    SSA_NAME_CHECK (NODE)->common.asm_written_flag

/* Nonzero if this SSA_NAME expression is currently on the free list of
   SSA_NAMES.  Using NOTHROW_FLAG seems reasonably safe since throwing
   has no meaning for an SSA_NAME.  */
#define SSA_NAME_IN_FREE_LIST(NODE) \
    SSA_NAME_CHECK (NODE)->common.nothrow_flag

/* Attributes for SSA_NAMEs for pointer-type variables.  */
#define SSA_NAME_PTR_INFO(N) \
    SSA_NAME_CHECK (N)->ssa_name.ptr_info

/* Get the value of this SSA_NAME, if available.  */
#define SSA_NAME_VALUE(N) \
   SSA_NAME_CHECK (N)->ssa_name.value_handle

#ifndef _TREE_FLOW_H
struct ptr_info_def;
#endif



/* Immediate use linking structure.  This structure is used for maintaining
   a doubly linked list of uses of an SSA_NAME.  */
typedef struct ssa_use_operand_d GTY(())
{
  struct ssa_use_operand_d* GTY((skip(""))) prev;
  struct ssa_use_operand_d* GTY((skip(""))) next;
  tree GTY((skip(""))) stmt;
  tree *GTY((skip(""))) use;
} ssa_use_operand_t;

/* Return the immediate_use information for an SSA_NAME. */
#define SSA_NAME_IMM_USE_NODE(NODE) SSA_NAME_CHECK (NODE)->ssa_name.imm_uses

struct tree_ssa_name GTY(())
{
  struct tree_common common;

  /* _DECL wrapped by this SSA name.  */
  tree var;

  /* SSA version number.  */
  unsigned int version;

  /* Pointer attributes used for alias analysis.  */
  struct ptr_info_def *ptr_info;

  /* Value for SSA name used by various passes.

     Right now only invariants are allowed to persist beyond a pass in
     this field; in the future we will allow VALUE_HANDLEs to persist
     as well.  */
  tree value_handle;

  /* Immediate uses list for this SSA_NAME.  */
  struct ssa_use_operand_d imm_uses;
};

/* In a PHI_NODE node.  */

/* These 2 macros should be considered off limits for use by developers.  If 
   you wish to access the use or def fields of a PHI_NODE in the SSA 
   optimizers, use the accessor macros found in tree-ssa-operands.h.  
   These two macros are to be used only by those accessor macros, and other 
   select places where we *absolutely* must take the address of the tree.  */

#define PHI_RESULT_TREE(NODE)		PHI_NODE_CHECK (NODE)->phi.result
#define PHI_ARG_DEF_TREE(NODE, I)	PHI_NODE_ELT_CHECK (NODE, I).def

/* PHI_NODEs for each basic block are chained together in a single linked
   list.  The head of the list is linked from the block annotation, and
   the link to the next PHI is in PHI_CHAIN.  */
#define PHI_CHAIN(NODE)		TREE_CHAIN (PHI_NODE_CHECK (NODE))

#define PHI_NUM_ARGS(NODE)		PHI_NODE_CHECK (NODE)->phi.num_args
#define PHI_ARG_CAPACITY(NODE)		PHI_NODE_CHECK (NODE)->phi.capacity
#define PHI_ARG_ELT(NODE, I)		PHI_NODE_ELT_CHECK (NODE, I)
#define PHI_ARG_EDGE(NODE, I) 		(EDGE_PRED (PHI_BB ((NODE)), (I)))
#define PHI_BB(NODE)			PHI_NODE_CHECK (NODE)->phi.bb
#define PHI_ARG_IMM_USE_NODE(NODE, I)	PHI_NODE_ELT_CHECK (NODE, I).imm_use

struct phi_arg_d GTY(())
{
  /* imm_use MUST be the first element in struct because we do some
     pointer arithmetic with it.  See phi_arg_index_from_use.  */
  struct ssa_use_operand_d imm_use;
  tree def;
};

struct tree_phi_node GTY(())
{
  struct tree_common common;
  tree result;
  int num_args;
  int capacity;

  /* Basic block to that the phi node belongs.  */
  struct basic_block_def *bb;

  /* Arguments of the PHI node.  These are maintained in the same
     order as predecessor edge vector BB->PREDS.  */
  struct phi_arg_d GTY ((length ("((tree)&%h)->phi.num_args"))) a[1];
};

#define OMP_CLAUSE_CODE(NODE)					\
	(OMP_CLAUSE_CHECK (NODE))->omp_clause.code

#define OMP_CLAUSE_SET_CODE(NODE, CODE)				\
	((OMP_CLAUSE_CHECK (NODE))->omp_clause.code = (CODE))

#define OMP_CLAUSE_CODE(NODE)					\
	(OMP_CLAUSE_CHECK (NODE))->omp_clause.code

#define OMP_CLAUSE_OPERAND(NODE, I)				\
	OMP_CLAUSE_ELT_CHECK (NODE, I)

struct tree_omp_clause GTY(())
{
  struct tree_common common;
  enum omp_clause_code code;
  union omp_clause_subcode {
    enum omp_clause_default_kind  default_kind;
    enum omp_clause_schedule_kind schedule_kind;
    enum tree_code                reduction_code;
  } GTY ((skip)) subcode;
  tree GTY ((length ("omp_clause_num_ops[OMP_CLAUSE_CODE ((tree)&%h)]"))) ops[1];
};


struct varray_head_tag;

/* In a BLOCK node.  */
#define BLOCK_VARS(NODE) (BLOCK_CHECK (NODE)->block.vars)
#define BLOCK_SUBBLOCKS(NODE) (BLOCK_CHECK (NODE)->block.subblocks)
#define BLOCK_SUPERCONTEXT(NODE) (BLOCK_CHECK (NODE)->block.supercontext)
/* Note: when changing this, make sure to find the places
   that use chainon or nreverse.  */
#define BLOCK_CHAIN(NODE) TREE_CHAIN (BLOCK_CHECK (NODE))
#define BLOCK_ABSTRACT_ORIGIN(NODE) (BLOCK_CHECK (NODE)->block.abstract_origin)
#define BLOCK_ABSTRACT(NODE) (BLOCK_CHECK (NODE)->block.abstract_flag)

/* Nonzero means that this block is prepared to handle exceptions
   listed in the BLOCK_VARS slot.  */
#define BLOCK_HANDLER_BLOCK(NODE) \
  (BLOCK_CHECK (NODE)->block.handler_block_flag)

/* An index number for this block.  These values are not guaranteed to
   be unique across functions -- whether or not they are depends on
   the debugging output format in use.  */
#define BLOCK_NUMBER(NODE) (BLOCK_CHECK (NODE)->block.block_num)

/* If block reordering splits a lexical block into discontiguous
   address ranges, we'll make a copy of the original block.

   Note that this is logically distinct from BLOCK_ABSTRACT_ORIGIN.
   In that case, we have one source block that has been replicated
   (through inlining or unrolling) into many logical blocks, and that
   these logical blocks have different physical variables in them.

   In this case, we have one logical block split into several
   non-contiguous address ranges.  Most debug formats can't actually
   represent this idea directly, so we fake it by creating multiple
   logical blocks with the same variables in them.  However, for those
   that do support non-contiguous regions, these allow the original
   logical block to be reconstructed, along with the set of address
   ranges.

   One of the logical block fragments is arbitrarily chosen to be
   the ORIGIN.  The other fragments will point to the origin via
   BLOCK_FRAGMENT_ORIGIN; the origin itself will have this pointer
   be null.  The list of fragments will be chained through
   BLOCK_FRAGMENT_CHAIN from the origin.  */

#define BLOCK_FRAGMENT_ORIGIN(NODE) (BLOCK_CHECK (NODE)->block.fragment_origin)
#define BLOCK_FRAGMENT_CHAIN(NODE) (BLOCK_CHECK (NODE)->block.fragment_chain)

/* For an inlined function, this gives the location where it was called
   from.  This is only set in the top level block, which corresponds to the
   inlined function scope.  This is used in the debug output routines.  */

#define BLOCK_SOURCE_LOCATION(NODE) (BLOCK_CHECK (NODE)->block.locus)

struct tree_block GTY(())
{
  struct tree_common common;

  unsigned handler_block_flag : 1;
  unsigned abstract_flag : 1;
  unsigned block_num : 30;

  tree vars;
  tree subblocks;
  tree supercontext;
  tree abstract_origin;
  tree fragment_origin;
  tree fragment_chain;
  location_t locus;
};

/* Define fields and accessors for nodes representing data types.  */

/* See tree.def for documentation of the use of these fields.
   Look at the documentation of the various ..._TYPE tree codes.

   Note that the type.values, type.minval, and type.maxval fields are
   overloaded and used for different macros in different kinds of types.
   Each macro must check to ensure the tree node is of the proper kind of
   type.  Note also that some of the front-ends also overload these fields,
   so they must be checked as well.  */

#define TYPE_UID(NODE) (TYPE_CHECK (NODE)->type.uid)
#define TYPE_SIZE(NODE) (TYPE_CHECK (NODE)->type.size)
#define TYPE_SIZE_UNIT(NODE) (TYPE_CHECK (NODE)->type.size_unit)
#define TYPE_MODE(NODE) (TYPE_CHECK (NODE)->type.mode)
#define TYPE_VALUES(NODE) (ENUMERAL_TYPE_CHECK (NODE)->type.values)
#define TYPE_DOMAIN(NODE) (ARRAY_TYPE_CHECK (NODE)->type.values)
#define TYPE_FIELDS(NODE) (RECORD_OR_UNION_CHECK (NODE)->type.values)
#define TYPE_CACHED_VALUES(NODE) (TYPE_CHECK(NODE)->type.values)
#define TYPE_ORIG_SIZE_TYPE(NODE)			\
  (INTEGER_TYPE_CHECK (NODE)->type.values		\
  ? TREE_TYPE ((NODE)->type.values) : NULL_TREE)
#define TYPE_METHODS(NODE) (RECORD_OR_UNION_CHECK (NODE)->type.maxval)
#define TYPE_VFIELD(NODE) (RECORD_OR_UNION_CHECK (NODE)->type.minval)
#define TYPE_ARG_TYPES(NODE) (FUNC_OR_METHOD_CHECK (NODE)->type.values)
#define TYPE_METHOD_BASETYPE(NODE) (FUNC_OR_METHOD_CHECK (NODE)->type.maxval)
#define TYPE_OFFSET_BASETYPE(NODE) (OFFSET_TYPE_CHECK (NODE)->type.maxval)
#define TYPE_POINTER_TO(NODE) (TYPE_CHECK (NODE)->type.pointer_to)
#define TYPE_REFERENCE_TO(NODE) (TYPE_CHECK (NODE)->type.reference_to)
#define TYPE_NEXT_PTR_TO(NODE) (POINTER_TYPE_CHECK (NODE)->type.minval)
#define TYPE_NEXT_REF_TO(NODE) (REFERENCE_TYPE_CHECK (NODE)->type.minval)
#define TYPE_MIN_VALUE(NODE) (NUMERICAL_TYPE_CHECK (NODE)->type.minval)
#define TYPE_MAX_VALUE(NODE) (NUMERICAL_TYPE_CHECK (NODE)->type.maxval)
#define TYPE_PRECISION(NODE) (TYPE_CHECK (NODE)->type.precision)
#define TYPE_SYMTAB_ADDRESS(NODE) (TYPE_CHECK (NODE)->type.symtab.address)
#define TYPE_SYMTAB_POINTER(NODE) (TYPE_CHECK (NODE)->type.symtab.pointer)
#define TYPE_SYMTAB_DIE(NODE) (TYPE_CHECK (NODE)->type.symtab.die)
#define TYPE_NAME(NODE) (TYPE_CHECK (NODE)->type.name)
#define TYPE_NEXT_VARIANT(NODE) (TYPE_CHECK (NODE)->type.next_variant)
#define TYPE_MAIN_VARIANT(NODE) (TYPE_CHECK (NODE)->type.main_variant)
#define TYPE_CONTEXT(NODE) (TYPE_CHECK (NODE)->type.context)
#define TYPE_LANG_SPECIFIC(NODE) (TYPE_CHECK (NODE)->type.lang_specific)

/* For a VECTOR_TYPE node, this describes a different type which is emitted
   in the debugging output.  We use this to describe a vector as a
   structure containing an array.  */
#define TYPE_DEBUG_REPRESENTATION_TYPE(NODE) (VECTOR_TYPE_CHECK (NODE)->type.values)

/* For record and union types, information about this type, as a base type
   for itself.  */
#define TYPE_BINFO(NODE) (RECORD_OR_UNION_CHECK(NODE)->type.binfo)

/* For non record and union types, used in a language-dependent way.  */
#define TYPE_LANG_SLOT_1(NODE) (NOT_RECORD_OR_UNION_CHECK(NODE)->type.binfo)

/* The (language-specific) typed-based alias set for this type.
   Objects whose TYPE_ALIAS_SETs are different cannot alias each
   other.  If the TYPE_ALIAS_SET is -1, no alias set has yet been
   assigned to this type.  If the TYPE_ALIAS_SET is 0, objects of this
   type can alias objects of any type.  */
#define TYPE_ALIAS_SET(NODE) (TYPE_CHECK (NODE)->type.alias_set)

/* Nonzero iff the typed-based alias set for this type has been
   calculated.  */
#define TYPE_ALIAS_SET_KNOWN_P(NODE) (TYPE_CHECK (NODE)->type.alias_set != -1)

/* A TREE_LIST of IDENTIFIER nodes of the attributes that apply
   to this type.  */
#define TYPE_ATTRIBUTES(NODE) (TYPE_CHECK (NODE)->type.attributes)

/* The alignment necessary for objects of this type.
   The value is an int, measured in bits.  */
#define TYPE_ALIGN(NODE) (TYPE_CHECK (NODE)->type.align)

/* 1 if the alignment for this type was requested by "aligned" attribute,
   0 if it is the default for this type.  */
#define TYPE_USER_ALIGN(NODE) (TYPE_CHECK (NODE)->type.user_align)

/* The alignment for NODE, in bytes.  */
#define TYPE_ALIGN_UNIT(NODE) (TYPE_ALIGN (NODE) / BITS_PER_UNIT)

/* If your language allows you to declare types, and you want debug info
   for them, then you need to generate corresponding TYPE_DECL nodes.
   These "stub" TYPE_DECL nodes have no name, and simply point at the
   type node.  You then set the TYPE_STUB_DECL field of the type node
   to point back at the TYPE_DECL node.  This allows the debug routines
   to know that the two nodes represent the same type, so that we only
   get one debug info record for them.  */
#define TYPE_STUB_DECL(NODE) TREE_CHAIN (NODE)

/* In a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, it means the type
   has BLKmode only because it lacks the alignment requirement for
   its size.  */
#define TYPE_NO_FORCE_BLK(NODE) (TYPE_CHECK (NODE)->type.no_force_blk_flag)

/* In an INTEGER_TYPE, it means the type represents a size.  We use
   this both for validity checking and to permit optimizations that
   are unsafe for other types.  Note that the C `size_t' type should
   *not* have this flag set.  The `size_t' type is simply a typedef
   for an ordinary integer type that happens to be the type of an
   expression returned by `sizeof'; `size_t' has no special
   properties.  Expressions whose type have TYPE_IS_SIZETYPE set are
   always actual sizes.  */
#define TYPE_IS_SIZETYPE(NODE) \
  (INTEGER_TYPE_CHECK (NODE)->type.no_force_blk_flag)

/* In a FUNCTION_TYPE, indicates that the function returns with the stack
   pointer depressed.  */
#define TYPE_RETURNS_STACK_DEPRESSED(NODE) \
  (FUNCTION_TYPE_CHECK (NODE)->type.no_force_blk_flag)

/* Nonzero in a type considered volatile as a whole.  */
#define TYPE_VOLATILE(NODE) (TYPE_CHECK (NODE)->common.volatile_flag)

/* Means this type is const-qualified.  */
#define TYPE_READONLY(NODE) (TYPE_CHECK (NODE)->common.readonly_flag)

/* If nonzero, this type is `restrict'-qualified, in the C sense of
   the term.  */
#define TYPE_RESTRICT(NODE) (TYPE_CHECK (NODE)->type.restrict_flag)

/* There is a TYPE_QUAL value for each type qualifier.  They can be
   combined by bitwise-or to form the complete set of qualifiers for a
   type.  */

#define TYPE_UNQUALIFIED   0x0
#define TYPE_QUAL_CONST    0x1
#define TYPE_QUAL_VOLATILE 0x2
#define TYPE_QUAL_RESTRICT 0x4

/* The set of type qualifiers for this type.  */
#define TYPE_QUALS(NODE)					\
  ((TYPE_READONLY (NODE) * TYPE_QUAL_CONST)			\
   | (TYPE_VOLATILE (NODE) * TYPE_QUAL_VOLATILE)		\
   | (TYPE_RESTRICT (NODE) * TYPE_QUAL_RESTRICT))

/* These flags are available for each language front end to use internally.  */
#define TYPE_LANG_FLAG_0(NODE) (TYPE_CHECK (NODE)->type.lang_flag_0)
#define TYPE_LANG_FLAG_1(NODE) (TYPE_CHECK (NODE)->type.lang_flag_1)
#define TYPE_LANG_FLAG_2(NODE) (TYPE_CHECK (NODE)->type.lang_flag_2)
#define TYPE_LANG_FLAG_3(NODE) (TYPE_CHECK (NODE)->type.lang_flag_3)
#define TYPE_LANG_FLAG_4(NODE) (TYPE_CHECK (NODE)->type.lang_flag_4)
#define TYPE_LANG_FLAG_5(NODE) (TYPE_CHECK (NODE)->type.lang_flag_5)
#define TYPE_LANG_FLAG_6(NODE) (TYPE_CHECK (NODE)->type.lang_flag_6)

/* Used to keep track of visited nodes in tree traversals.  This is set to
   0 by copy_node and make_node.  */
#define TREE_VISITED(NODE) ((NODE)->common.visited)

/* If set in an ARRAY_TYPE, indicates a string type (for languages
   that distinguish string from array of char).
   If set in a INTEGER_TYPE, indicates a character type.  */
#define TYPE_STRING_FLAG(NODE) (TYPE_CHECK (NODE)->type.string_flag)

/* If non-NULL, this is an upper bound of the size (in bytes) of an
   object of the given ARRAY_TYPE.  This allows temporaries to be
   allocated.  */
#define TYPE_ARRAY_MAX_SIZE(ARRAY_TYPE) \
  (ARRAY_TYPE_CHECK (ARRAY_TYPE)->type.maxval)

/* For a VECTOR_TYPE, this is the number of sub-parts of the vector.  */
#define TYPE_VECTOR_SUBPARTS(VECTOR_TYPE) \
  (((unsigned HOST_WIDE_INT) 1) \
   << VECTOR_TYPE_CHECK (VECTOR_TYPE)->type.precision)

/* Set precision to n when we have 2^n sub-parts of the vector.  */
#define SET_TYPE_VECTOR_SUBPARTS(VECTOR_TYPE, X) \
  (VECTOR_TYPE_CHECK (VECTOR_TYPE)->type.precision = exact_log2 (X))

/* Indicates that objects of this type must be initialized by calling a
   function when they are created.  */
#define TYPE_NEEDS_CONSTRUCTING(NODE) \
  (TYPE_CHECK (NODE)->type.needs_constructing_flag)

/* Indicates that objects of this type (a UNION_TYPE), should be passed
   the same way that the first union alternative would be passed.  */
#define TYPE_TRANSPARENT_UNION(NODE)  \
  (UNION_TYPE_CHECK (NODE)->type.transparent_union_flag)

/* For an ARRAY_TYPE, indicates that it is not permitted to
   take the address of a component of the type.  */
#define TYPE_NONALIASED_COMPONENT(NODE) \
  (ARRAY_TYPE_CHECK (NODE)->type.transparent_union_flag)

/* Indicated that objects of this type should be laid out in as
   compact a way as possible.  */
#define TYPE_PACKED(NODE) (TYPE_CHECK (NODE)->type.packed_flag)

/* Used by type_contains_placeholder_p to avoid recomputation.
   Values are: 0 (unknown), 1 (false), 2 (true).  Never access
   this field directly.  */
#define TYPE_CONTAINS_PLACEHOLDER_INTERNAL(NODE) \
  (TYPE_CHECK (NODE)->type.contains_placeholder_bits)

struct die_struct;

struct tree_type GTY(())
{
  struct tree_common common;
  tree values;
  tree size;
  tree size_unit;
  tree attributes;
  unsigned int uid;

  unsigned int precision : 9;
  ENUM_BITFIELD(machine_mode) mode : 7;

  unsigned string_flag : 1;
  unsigned no_force_blk_flag : 1;
  unsigned needs_constructing_flag : 1;
  unsigned transparent_union_flag : 1;
  unsigned packed_flag : 1;
  unsigned restrict_flag : 1;
  unsigned contains_placeholder_bits : 2;

  unsigned lang_flag_0 : 1;
  unsigned lang_flag_1 : 1;
  unsigned lang_flag_2 : 1;
  unsigned lang_flag_3 : 1;
  unsigned lang_flag_4 : 1;
  unsigned lang_flag_5 : 1;
  unsigned lang_flag_6 : 1;
  unsigned user_align : 1;

  unsigned int align;
  tree pointer_to;
  tree reference_to;
  union tree_type_symtab {
    int GTY ((tag ("0"))) address;
    char * GTY ((tag ("1"))) pointer;
    struct die_struct * GTY ((tag ("2"))) die;
  } GTY ((desc ("debug_hooks == &sdb_debug_hooks ? 1 : debug_hooks == &dwarf2_debug_hooks ? 2 : 0"),
	  descbits ("2"))) symtab;
  tree name;
  tree minval;
  tree maxval;
  tree next_variant;
  tree main_variant;
  tree binfo;
  tree context;
  HOST_WIDE_INT alias_set;
  /* Points to a structure whose details depend on the language in use.  */
  struct lang_type *lang_specific;
};

/* Define accessor macros for information about type inheritance
   and basetypes.

   A "basetype" means a particular usage of a data type for inheritance
   in another type.  Each such basetype usage has its own "binfo"
   object to describe it.  The binfo object is a TREE_VEC node.

   Inheritance is represented by the binfo nodes allocated for a
   given type.  For example, given types C and D, such that D is
   inherited by C, 3 binfo nodes will be allocated: one for describing
   the binfo properties of C, similarly one for D, and one for
   describing the binfo properties of D as a base type for C.
   Thus, given a pointer to class C, one can get a pointer to the binfo
   of D acting as a basetype for C by looking at C's binfo's basetypes.  */

/* BINFO specific flags.  */

/* Nonzero means that the derivation chain is via a `virtual' declaration.  */
#define BINFO_VIRTUAL_P(NODE) (TREE_BINFO_CHECK (NODE)->common.static_flag)

/* Flags for language dependent use.  */
#define BINFO_MARKED(NODE) TREE_LANG_FLAG_0(TREE_BINFO_CHECK(NODE))
#define BINFO_FLAG_1(NODE) TREE_LANG_FLAG_1(TREE_BINFO_CHECK(NODE))
#define BINFO_FLAG_2(NODE) TREE_LANG_FLAG_2(TREE_BINFO_CHECK(NODE))
#define BINFO_FLAG_3(NODE) TREE_LANG_FLAG_3(TREE_BINFO_CHECK(NODE))
#define BINFO_FLAG_4(NODE) TREE_LANG_FLAG_4(TREE_BINFO_CHECK(NODE))
#define BINFO_FLAG_5(NODE) TREE_LANG_FLAG_5(TREE_BINFO_CHECK(NODE))
#define BINFO_FLAG_6(NODE) TREE_LANG_FLAG_6(TREE_BINFO_CHECK(NODE))

/* The actual data type node being inherited in this basetype.  */
#define BINFO_TYPE(NODE) TREE_TYPE (TREE_BINFO_CHECK(NODE))

/* The offset where this basetype appears in its containing type.
   BINFO_OFFSET slot holds the offset (in bytes)
   from the base of the complete object to the base of the part of the
   object that is allocated on behalf of this `type'.
   This is always 0 except when there is multiple inheritance.  */

#define BINFO_OFFSET(NODE) (TREE_BINFO_CHECK(NODE)->binfo.offset)
#define BINFO_OFFSET_ZEROP(NODE) (integer_zerop (BINFO_OFFSET (NODE)))

/* The virtual function table belonging to this basetype.  Virtual
   function tables provide a mechanism for run-time method dispatching.
   The entries of a virtual function table are language-dependent.  */

#define BINFO_VTABLE(NODE) (TREE_BINFO_CHECK(NODE)->binfo.vtable)

/* The virtual functions in the virtual function table.  This is
   a TREE_LIST that is used as an initial approximation for building
   a virtual function table for this basetype.  */
#define BINFO_VIRTUALS(NODE) (TREE_BINFO_CHECK(NODE)->binfo.virtuals)

/* A vector of binfos for the direct basetypes inherited by this
   basetype.

   If this basetype describes type D as inherited in C, and if the
   basetypes of D are E and F, then this vector contains binfos for
   inheritance of E and F by C.  */
#define BINFO_BASE_BINFOS(NODE) (&TREE_BINFO_CHECK(NODE)->binfo.base_binfos)

/* The number of basetypes for NODE.  */
#define BINFO_N_BASE_BINFOS(NODE) (VEC_length (tree, BINFO_BASE_BINFOS (NODE)))

/* Accessor macro to get to the Nth base binfo of this binfo.  */
#define BINFO_BASE_BINFO(NODE,N) \
 (VEC_index (tree, BINFO_BASE_BINFOS (NODE), (N)))
#define BINFO_BASE_ITERATE(NODE,N,B) \
 (VEC_iterate (tree, BINFO_BASE_BINFOS (NODE), (N), (B)))
#define BINFO_BASE_APPEND(NODE,T) \
 (VEC_quick_push (tree, BINFO_BASE_BINFOS (NODE), (T)))

/* For a BINFO record describing a virtual base class, i.e., one where
   TREE_VIA_VIRTUAL is set, this field assists in locating the virtual
   base.  The actual contents are language-dependent.  In the C++
   front-end this field is an INTEGER_CST giving an offset into the
   vtable where the offset to the virtual base can be found.  */
#define BINFO_VPTR_FIELD(NODE) (TREE_BINFO_CHECK(NODE)->binfo.vptr_field)

/* Indicates the accesses this binfo has to its bases. The values are
   access_public_node, access_protected_node or access_private_node.
   If this array is not present, public access is implied.  */
#define BINFO_BASE_ACCESSES(NODE) (TREE_BINFO_CHECK(NODE)->binfo.base_accesses)

#define BINFO_BASE_ACCESS(NODE,N) \
  VEC_index (tree, BINFO_BASE_ACCESSES (NODE), (N))
#define BINFO_BASE_ACCESS_APPEND(NODE,T) \
  VEC_quick_push (tree, BINFO_BASE_ACCESSES (NODE), (T))

/* The index in the VTT where this subobject's sub-VTT can be found.
   NULL_TREE if there is no sub-VTT.  */
#define BINFO_SUBVTT_INDEX(NODE) (TREE_BINFO_CHECK(NODE)->binfo.vtt_subvtt)

/* The index in the VTT where the vptr for this subobject can be
   found.  NULL_TREE if there is no secondary vptr in the VTT.  */
#define BINFO_VPTR_INDEX(NODE) (TREE_BINFO_CHECK(NODE)->binfo.vtt_vptr)

/* The BINFO_INHERITANCE_CHAIN points at the binfo for the base
   inheriting this base for non-virtual bases. For virtual bases it
   points either to the binfo for which this is a primary binfo, or to
   the binfo of the most derived type.  */
#define BINFO_INHERITANCE_CHAIN(NODE) \
	(TREE_BINFO_CHECK(NODE)->binfo.inheritance)

struct tree_binfo GTY (())
{
  struct tree_common common;

  tree offset;
  tree vtable;
  tree virtuals;
  tree vptr_field;
  VEC(tree,gc) *base_accesses;
  tree inheritance;

  tree vtt_subvtt;
  tree vtt_vptr;

  VEC(tree,none) base_binfos;
};


/* Define fields and accessors for nodes representing declared names.  */

/* Nonzero if DECL represents a variable for the SSA passes.  */
#define SSA_VAR_P(DECL)							\
	(TREE_CODE (DECL) == VAR_DECL					\
	 || TREE_CODE (DECL) == PARM_DECL				\
	 || TREE_CODE (DECL) == RESULT_DECL				\
	 || MTAG_P (DECL)						\
	 || (TREE_CODE (DECL) == SSA_NAME				\
	     && (TREE_CODE (SSA_NAME_VAR (DECL)) == VAR_DECL		\
		 || TREE_CODE (SSA_NAME_VAR (DECL)) == PARM_DECL	\
		 || TREE_CODE (SSA_NAME_VAR (DECL)) == RESULT_DECL	\
		 || MTAG_P (SSA_NAME_VAR (DECL)))))




/* Enumerate visibility settings.  */
#ifndef SYMBOL_VISIBILITY_DEFINED
#define SYMBOL_VISIBILITY_DEFINED
enum symbol_visibility
{
  VISIBILITY_DEFAULT,
  VISIBILITY_INTERNAL,
  VISIBILITY_HIDDEN,
  VISIBILITY_PROTECTED
};
#endif

struct function;


/* This is the name of the object as written by the user.
   It is an IDENTIFIER_NODE.  */
#define DECL_NAME(NODE) (DECL_MINIMAL_CHECK (NODE)->decl_minimal.name)

/* Every ..._DECL node gets a unique number.  */
#define DECL_UID(NODE) (DECL_MINIMAL_CHECK (NODE)->decl_minimal.uid)

/* These two fields describe where in the source code the declaration
   was.  If the declaration appears in several places (as for a C
   function that is declared first and then defined later), this
   information should refer to the definition.  */
#define DECL_SOURCE_LOCATION(NODE) (DECL_MINIMAL_CHECK (NODE)->decl_minimal.locus)
#define DECL_SOURCE_FILE(NODE) LOCATION_FILE (DECL_SOURCE_LOCATION (NODE))
#define DECL_SOURCE_LINE(NODE) LOCATION_LINE (DECL_SOURCE_LOCATION (NODE))
#ifdef USE_MAPPED_LOCATION
#define DECL_IS_BUILTIN(DECL) \
  (DECL_SOURCE_LOCATION (DECL) <= BUILTINS_LOCATION)
#else
#define DECL_IS_BUILTIN(DECL) (DECL_SOURCE_LINE(DECL) == 0)
#endif

/*  For FIELD_DECLs, this is the RECORD_TYPE, UNION_TYPE, or
    QUAL_UNION_TYPE node that the field is a member of.  For VAR_DECL,
    PARM_DECL, FUNCTION_DECL, LABEL_DECL, and CONST_DECL nodes, this
    points to either the FUNCTION_DECL for the containing function,
    the RECORD_TYPE or UNION_TYPE for the containing type, or
    NULL_TREE or a TRANSLATION_UNIT_DECL if the given decl has "file
    scope".  */
#define DECL_CONTEXT(NODE) (DECL_MINIMAL_CHECK (NODE)->decl_minimal.context)
#define DECL_FIELD_CONTEXT(NODE) (FIELD_DECL_CHECK (NODE)->decl_minimal.context)
struct tree_decl_minimal GTY(())
{
  struct tree_common common;
  location_t locus;
  unsigned int uid;
  tree name;
  tree context;
};

/* When computing aliasing information, we represent the memory pointed-to
   by pointers with artificial variables called "memory tags" (MT).  There
   are two kinds of tags, namely symbol and name:
   
   Symbol tags (SMT) are used in flow-insensitive alias analysis, they
   represent all the pointed-to locations and variables pointed-to by
   the same pointer symbol.  Usually, this set is computed using
   type-based analysis (i.e., alias set classes), but this may not
   always be the case.

   Name tags (NMT) are used in flow-sensitive points-to alias
   analysis, they represent the variables and memory locations
   pointed-to by a specific SSA_NAME pointer.

   In general, given a pointer P with a symbol tag SMT, the alias set
   of SMT should be the union of all the alias sets of the NMTs of
   every SSA_NAME for P.  */
struct tree_memory_tag GTY(())
{
  struct tree_decl_minimal common;
  unsigned int is_global:1;
  unsigned int is_used_alone:1;
  unsigned int old_used_alone:1;
};

#define MTAG_GLOBAL(NODE) (TREE_MEMORY_TAG_CHECK (NODE)->mtag.is_global)

/* This flag is true if a SMT is used as the V_MAY_DEF or VUSE operand
   directly, because the access had all of the SMT's aliases pruned
   from it.  */
#define SMT_USED_ALONE(NODE) (SYMBOL_MEMORY_TAG_CHECK (NODE)->mtag.is_used_alone)

/* This flag is used to temporarily store the old value of the used alone
   flag when updating so we know whether to mark the symbol for
   renaming.  */
#define SMT_OLD_USED_ALONE(NODE) (SYMBOL_MEMORY_TAG_CHECK (NODE)->mtag.old_used_alone)

struct tree_struct_field_tag GTY(())
{
  struct tree_memory_tag common;
  
  /* Parent variable.  */
  tree parent_var;
 
  /* Offset inside structure.  */
  unsigned HOST_WIDE_INT offset;

  /* Size of the field.  */
  unsigned HOST_WIDE_INT size;

};
#define SFT_PARENT_VAR(NODE) (STRUCT_FIELD_TAG_CHECK (NODE)->sft.parent_var)
#define SFT_OFFSET(NODE) (STRUCT_FIELD_TAG_CHECK (NODE)->sft.offset)
#define SFT_SIZE(NODE) (STRUCT_FIELD_TAG_CHECK (NODE)->sft.size)

/* For any sort of a ..._DECL node, this points to the original (abstract)
   decl node which this decl is an instance of, or else it is NULL indicating
   that this decl is not an instance of some other decl.  For example,
   in a nested declaration of an inline function, this points back to the
   definition.  */
#define DECL_ABSTRACT_ORIGIN(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.abstract_origin)

/* Like DECL_ABSTRACT_ORIGIN, but returns NODE if there's no abstract
   origin.  This is useful when setting the DECL_ABSTRACT_ORIGIN.  */
#define DECL_ORIGIN(NODE) \
  (DECL_ABSTRACT_ORIGIN (NODE) ? DECL_ABSTRACT_ORIGIN (NODE) : (NODE))

/* Nonzero for any sort of ..._DECL node means this decl node represents an
   inline instance of some original (abstract) decl from an inline function;
   suppress any warnings about shadowing some other variable.  FUNCTION_DECL
   nodes can also have their abstract origin set to themselves.  */
#define DECL_FROM_INLINE(NODE) (DECL_ABSTRACT_ORIGIN (NODE) != NULL_TREE \
				&& DECL_ABSTRACT_ORIGIN (NODE) != (NODE))

/* In a DECL this is the field where attributes are stored.  */
#define DECL_ATTRIBUTES(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.attributes)

/* For a FUNCTION_DECL, holds the tree of BINDINGs.
   For a TRANSLATION_UNIT_DECL, holds the namespace's BLOCK.
   For a VAR_DECL, holds the initial value.
   For a PARM_DECL, not used--default
   values for parameters are encoded in the type of the function,
   not in the PARM_DECL slot.
   For a FIELD_DECL, this is used for enumeration values and the C
   frontend uses it for temporarily storing bitwidth of bitfields. 

   ??? Need to figure out some way to check this isn't a PARM_DECL.  */
#define DECL_INITIAL(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.initial)

/* Holds the size of the datum, in bits, as a tree expression.
   Need not be constant.  */
#define DECL_SIZE(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.size)
/* Likewise for the size in bytes.  */
#define DECL_SIZE_UNIT(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.size_unit)
/* Holds the alignment required for the datum, in bits.  */
#define DECL_ALIGN(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.u1.a.align)
/* The alignment of NODE, in bytes.  */
#define DECL_ALIGN_UNIT(NODE) (DECL_ALIGN (NODE) / BITS_PER_UNIT)
/* For FIELD_DECLs, off_align holds the number of low-order bits of
   DECL_FIELD_OFFSET which are known to be always zero.
   DECL_OFFSET_ALIGN thus returns the alignment that DECL_FIELD_OFFSET
   has.  */
#define DECL_USER_ALIGN(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.user_align)
/* Holds the machine mode corresponding to the declaration of a variable or
   field.  Always equal to TYPE_MODE (TREE_TYPE (decl)) except for a
   FIELD_DECL.  */
#define DECL_MODE(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.mode)

/* For FUNCTION_DECL, if it is built-in, this identifies which built-in
   operation it is.  Note, however, that this field is overloaded, with
   DECL_BUILT_IN_CLASS as the discriminant, so the latter must always be
   checked before any access to the former.  */
#define DECL_FUNCTION_CODE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl_common.u1.f)
#define DECL_DEBUG_EXPR_IS_FROM(NODE) \
  (DECL_COMMON_CHECK (NODE)->decl_common.debug_expr_is_from)

/* Nonzero for a given ..._DECL node means that the name of this node should
   be ignored for symbolic debug purposes.  */ 
#define DECL_IGNORED_P(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.ignored_flag)

/* Nonzero for a given ..._DECL node means that this node represents an
   "abstract instance" of the given declaration (e.g. in the original
   declaration of an inline function).  When generating symbolic debugging
   information, we mustn't try to generate any address information for nodes
   marked as "abstract instances" because we don't actually generate
   any code or allocate any data space for such instances.  */
#define DECL_ABSTRACT(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.abstract_flag)

/* Language-specific decl information.  */
#define DECL_LANG_SPECIFIC(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_specific)

/* In a VAR_DECL or FUNCTION_DECL, nonzero means external reference:
   do not allocate storage, and refer to a definition elsewhere.  Note that
   this does not necessarily imply the entity represented by NODE
   has no program source-level definition in this translation unit.  For
   example, for a FUNCTION_DECL, DECL_SAVED_TREE may be non-NULL and
   DECL_EXTERNAL may be true simultaneously; that can be the case for
   a C99 "extern inline" function.  */
#define DECL_EXTERNAL(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.decl_flag_2)

/* In a VAR_DECL for a RECORD_TYPE, sets number for non-init_priority
   initializations.  */
#define DEFAULT_INIT_PRIORITY 65535
#define MAX_INIT_PRIORITY 65535
#define MAX_RESERVED_INIT_PRIORITY 100


/* Nonzero in a ..._DECL means this variable is ref'd from a nested function.
   For VAR_DECL nodes, PARM_DECL nodes, and FUNCTION_DECL nodes.

   For LABEL_DECL nodes, nonzero if nonlocal gotos to the label are permitted.

   Also set in some languages for variables, etc., outside the normal
   lexical scope, such as class instance variables.  */
#define DECL_NONLOCAL(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.nonlocal_flag)

/* Used in VAR_DECLs to indicate that the variable is a vtable.
   Used in FIELD_DECLs for vtable pointers.
   Used in FUNCTION_DECLs to indicate that the function is virtual.  */
#define DECL_VIRTUAL_P(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.virtual_flag)

/* Used to indicate that this DECL represents a compiler-generated entity.  */
#define DECL_ARTIFICIAL(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.artificial_flag)

/* Additional flags for language-specific uses.  */
#define DECL_LANG_FLAG_0(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_0)
#define DECL_LANG_FLAG_1(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_1)
#define DECL_LANG_FLAG_2(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_2)
#define DECL_LANG_FLAG_3(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_3)
#define DECL_LANG_FLAG_4(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_4)
#define DECL_LANG_FLAG_5(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_5)
#define DECL_LANG_FLAG_6(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_6)
#define DECL_LANG_FLAG_7(NODE) (DECL_COMMON_CHECK (NODE)->decl_common.lang_flag_7)

/* Used to indicate an alias set for the memory pointed to by this
   particular FIELD_DECL, PARM_DECL, or VAR_DECL, which must have
   pointer (or reference) type.  */
#define DECL_POINTER_ALIAS_SET(NODE) \
  (DECL_COMMON_CHECK (NODE)->decl_common.pointer_alias_set)

/* Nonzero if an alias set has been assigned to this declaration.  */
#define DECL_POINTER_ALIAS_SET_KNOWN_P(NODE) \
  (DECL_POINTER_ALIAS_SET (NODE) != - 1)

/* Nonzero for a decl which is at file scope.  */
#define DECL_FILE_SCOPE_P(EXP) 					\
  (! DECL_CONTEXT (EXP)						\
   || TREE_CODE (DECL_CONTEXT (EXP)) == TRANSLATION_UNIT_DECL)

/* Nonzero for a decl that is decorated using attribute used.
   This indicates compiler tools that this decl needs to be preserved.  */
#define DECL_PRESERVE_P(DECL) \
  DECL_COMMON_CHECK (DECL)->decl_common.preserve_flag
 
/* For function local variables of COMPLEX type, indicates that the
   variable is not aliased, and that all modifications to the variable
   have been adjusted so that they are killing assignments.  Thus the
   variable may now be treated as a GIMPLE register, and use real
   instead of virtual ops in SSA form.  */
#define DECL_COMPLEX_GIMPLE_REG_P(DECL) \
  DECL_COMMON_CHECK (DECL)->decl_common.gimple_reg_flag

/* This is true if DECL is call clobbered in the current function.
   The result of this flag should always be the same as
   bitmap_bit_p (call_clobbered_vars, DECL_UID (decl)).  */
#define DECL_CALL_CLOBBERED(DECL) \
  DECL_COMMON_CHECK (DECL)->decl_common.call_clobbered_flag

struct tree_decl_common GTY(())
{
  struct tree_decl_minimal common;
  tree size;

  ENUM_BITFIELD(machine_mode) mode : 8;

  unsigned nonlocal_flag : 1;
  unsigned virtual_flag : 1;
  unsigned ignored_flag : 1;
  unsigned abstract_flag : 1;
  unsigned artificial_flag : 1;
  unsigned user_align : 1;
  unsigned preserve_flag: 1;
  unsigned debug_expr_is_from : 1;

  unsigned lang_flag_0 : 1;
  unsigned lang_flag_1 : 1;
  unsigned lang_flag_2 : 1;
  unsigned lang_flag_3 : 1;
  unsigned lang_flag_4 : 1;
  unsigned lang_flag_5 : 1;
  unsigned lang_flag_6 : 1;
  unsigned lang_flag_7 : 1;
 
  /* In LABEL_DECL, this is DECL_ERROR_ISSUED.
     In VAR_DECL and PARM_DECL, this is DECL_REGISTER.  */
  unsigned decl_flag_0 : 1;
  /* In FIELD_DECL, this is DECL_PACKED.  */
  unsigned decl_flag_1 : 1;
  /* In FIELD_DECL, this is DECL_BIT_FIELD
     In VAR_DECL and FUNCTION_DECL, this is DECL_EXTERNAL. 
     In TYPE_DECL, this is TYPE_DECL_SUPRESS_DEBUG.  */  
  unsigned decl_flag_2 : 1;  
  /* In FIELD_DECL, this is DECL_NONADDRESSABLE_P
     In VAR_DECL and PARM_DECL, this is DECL_HAS_VALUE_EXPR.  */
  unsigned decl_flag_3 : 1;  
  /* Logically, these two would go in a theoretical base shared by var and 
     parm decl. */
  unsigned gimple_reg_flag : 1;
  unsigned call_clobbered_flag : 1;
  
  union tree_decl_u1 {
    /* In a FUNCTION_DECL for which DECL_BUILT_IN holds, this is
       DECL_FUNCTION_CODE.  */
    enum built_in_function f;
    /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this
       is used by language-dependent code.  */
    HOST_WIDE_INT i;
    /* DECL_ALIGN and DECL_OFFSET_ALIGN.  (These are not used for
       FUNCTION_DECLs).  */
    struct tree_decl_u1_a {
      unsigned int align : 24;
      unsigned int off_align : 8;
    } a;
  } GTY ((skip)) u1;

  tree size_unit;
  tree initial;
  tree attributes;
  tree abstract_origin;
  
  HOST_WIDE_INT pointer_alias_set; 
  /* Points to a structure whose details depend on the language in use.  */
  struct lang_decl *lang_specific;
};

extern tree decl_value_expr_lookup (tree);
extern void decl_value_expr_insert (tree, tree);

/* In a VAR_DECL or PARM_DECL, the location at which the value may be found,
   if transformations have made this more complicated than evaluating the
   decl itself.  This should only be used for debugging; once this field has
   been set, the decl itself may not legitimately appear in the function.  */
#define DECL_HAS_VALUE_EXPR_P(NODE) \
  (TREE_CHECK2 (NODE, VAR_DECL, PARM_DECL)->decl_common.decl_flag_3)
#define DECL_VALUE_EXPR(NODE) \
  (decl_value_expr_lookup (DECL_WRTL_CHECK (NODE))) 
#define SET_DECL_VALUE_EXPR(NODE, VAL)			\
  (decl_value_expr_insert (DECL_WRTL_CHECK (NODE), VAL))

/* Holds the RTL expression for the value of a variable or function.
   This value can be evaluated lazily for functions, variables with
   static storage duration, and labels.  */
#define DECL_RTL(NODE)					\
  (DECL_WRTL_CHECK (NODE)->decl_with_rtl.rtl		\
   ? (NODE)->decl_with_rtl.rtl					\
   : (make_decl_rtl (NODE), (NODE)->decl_with_rtl.rtl))

/* Set the DECL_RTL for NODE to RTL.  */
#define SET_DECL_RTL(NODE, RTL) set_decl_rtl (NODE, RTL)

/* Returns nonzero if NODE is a tree node that can contain RTL.  */
#define HAS_RTL_P(NODE) (CODE_CONTAINS_STRUCT (TREE_CODE (NODE), TS_DECL_WRTL))

/* Returns nonzero if the DECL_RTL for NODE has already been set.  */
#define DECL_RTL_SET_P(NODE)  (HAS_RTL_P (NODE) && DECL_WRTL_CHECK (NODE)->decl_with_rtl.rtl != NULL)

/* Copy the RTL from NODE1 to NODE2.  If the RTL was not set for
   NODE1, it will not be set for NODE2; this is a lazy copy.  */
#define COPY_DECL_RTL(NODE1, NODE2) \
  (DECL_WRTL_CHECK (NODE2)->decl_with_rtl.rtl = DECL_WRTL_CHECK (NODE1)->decl_with_rtl.rtl)

/* The DECL_RTL for NODE, if it is set, or NULL, if it is not set.  */
#define DECL_RTL_IF_SET(NODE) (DECL_RTL_SET_P (NODE) ? DECL_RTL (NODE) : NULL)

/* In VAR_DECL and PARM_DECL nodes, nonzero means declared `register'.  */
#define DECL_REGISTER(NODE) (DECL_WRTL_CHECK (NODE)->decl_common.decl_flag_0)

struct tree_decl_with_rtl GTY(())
{
  struct tree_decl_common common;
  rtx rtl;
};

/* In a FIELD_DECL, this is the field position, counting in bytes, of the
   byte containing the bit closest to the beginning of the structure.  */
#define DECL_FIELD_OFFSET(NODE) (FIELD_DECL_CHECK (NODE)->field_decl.offset)

/* In a FIELD_DECL, this is the offset, in bits, of the first bit of the
   field from DECL_FIELD_OFFSET.  */
#define DECL_FIELD_BIT_OFFSET(NODE) (FIELD_DECL_CHECK (NODE)->field_decl.bit_offset)

/* In a FIELD_DECL, this indicates whether the field was a bit-field and
   if so, the type that was originally specified for it.
   TREE_TYPE may have been modified (in finish_struct).  */
#define DECL_BIT_FIELD_TYPE(NODE) (FIELD_DECL_CHECK (NODE)->field_decl.bit_field_type)

/* For a FIELD_DECL in a QUAL_UNION_TYPE, records the expression, which
   if nonzero, indicates that the field occupies the type.  */
#define DECL_QUALIFIER(NODE) (FIELD_DECL_CHECK (NODE)->field_decl.qualifier)

/* For FIELD_DECLs, off_align holds the number of low-order bits of
   DECL_FIELD_OFFSET which are known to be always zero.
   DECL_OFFSET_ALIGN thus returns the alignment that DECL_FIELD_OFFSET
   has.  */
#define DECL_OFFSET_ALIGN(NODE) \
  (((unsigned HOST_WIDE_INT)1) << FIELD_DECL_CHECK (NODE)->decl_common.u1.a.off_align)

/* Specify that DECL_ALIGN(NODE) is a multiple of X.  */
#define SET_DECL_OFFSET_ALIGN(NODE, X) \
  (FIELD_DECL_CHECK (NODE)->decl_common.u1.a.off_align = exact_log2 ((X) & -(X)))
/* 1 if the alignment for this type was requested by "aligned" attribute,
   0 if it is the default for this type.  */

/* For FIELD_DECLS, DECL_FCONTEXT is the *first* baseclass in
   which this FIELD_DECL is defined.  This information is needed when
   writing debugging information about vfield and vbase decls for C++.  */
#define DECL_FCONTEXT(NODE) (FIELD_DECL_CHECK (NODE)->field_decl.fcontext)

/* In a FIELD_DECL, indicates this field should be bit-packed.  */
#define DECL_PACKED(NODE) (FIELD_DECL_CHECK (NODE)->decl_common.decl_flag_1)

/* Nonzero in a FIELD_DECL means it is a bit field, and must be accessed
   specially.  */
#define DECL_BIT_FIELD(NODE) (FIELD_DECL_CHECK (NODE)->decl_common.decl_flag_2)

/* Used in a FIELD_DECL to indicate that we cannot form the address of
   this component.  */
#define DECL_NONADDRESSABLE_P(NODE) \
  (FIELD_DECL_CHECK (NODE)->decl_common.decl_flag_3)

struct tree_field_decl GTY(())
{
  struct tree_decl_common common;

  tree offset;	
  tree bit_field_type;	
  tree qualifier;
  tree bit_offset;
  tree fcontext;
 
};

/* A numeric unique identifier for a LABEL_DECL.  The UID allocation is
   dense, unique within any one function, and may be used to index arrays.
   If the value is -1, then no UID has been assigned.  */
#define LABEL_DECL_UID(NODE) \
  (LABEL_DECL_CHECK (NODE)->decl_common.pointer_alias_set)

/* In LABEL_DECL nodes, nonzero means that an error message about
   jumping into such a binding contour has been printed for this label.  */
#define DECL_ERROR_ISSUED(NODE) (LABEL_DECL_CHECK (NODE)->decl_common.decl_flag_0)

struct tree_label_decl GTY(())
{
  struct tree_decl_with_rtl common;
  /* Java's verifier has some need to store information about labels,
     and was using fields that no longer exist on labels.  
     Once the verifier doesn't need these anymore, they should be removed.  */
  tree java_field_1;
  tree java_field_2;
  tree java_field_3;
  unsigned int java_field_4;

};

struct tree_result_decl GTY(())
{
  struct tree_decl_with_rtl common;
};

struct tree_const_decl GTY(())
{
  struct tree_decl_with_rtl common;
};

/* For a PARM_DECL, records the data type used to pass the argument,
   which may be different from the type seen in the program.  */
#define DECL_ARG_TYPE(NODE) (PARM_DECL_CHECK (NODE)->decl_common.initial)

/* For PARM_DECL, holds an RTL for the stack slot or register
   where the data was actually passed.  */
#define DECL_INCOMING_RTL(NODE) (PARM_DECL_CHECK (NODE)->parm_decl.incoming_rtl)

struct tree_parm_decl GTY(())
{
  struct tree_decl_with_rtl common;
  rtx incoming_rtl;  
};


/* Nonzero in a decl means that the gimplifier has seen (or placed)
   this variable in a BIND_EXPR.  */
#define DECL_SEEN_IN_BIND_EXPR_P(NODE) \
  (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.seen_in_bind_expr)

/* Used to indicate that the linkage status of this DECL is not yet known,
   so it should not be output now.  */
#define DECL_DEFER_OUTPUT(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.defer_output)

/* Nonzero for a given ..._DECL node means that no warnings should be
   generated just because this node is unused.  */
#define DECL_IN_SYSTEM_HEADER(NODE) \
  (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.in_system_header_flag)

  /* Used to indicate that this DECL has weak linkage.  */
#define DECL_WEAK(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.weak_flag)

/* Internal to the gimplifier.  Indicates that the value is a formal
   temporary controlled by the gimplifier.  */
#define DECL_GIMPLE_FORMAL_TEMP_P(DECL) \
  DECL_WITH_VIS_CHECK (DECL)->decl_with_vis.gimple_formal_temp

/* Used to indicate that the DECL is a dllimport.  */
#define DECL_DLLIMPORT_P(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.dllimport_flag)

/* DECL_BASED_ON_RESTRICT_P records whether a VAR_DECL is a temporary
   based on a variable with a restrict qualified type.  If it is,
   DECL_RESTRICT_BASE returns the restrict qualified variable on which
   it is based.  */

#define DECL_BASED_ON_RESTRICT_P(NODE) \
  (VAR_DECL_CHECK (NODE)->decl_with_vis.based_on_restrict_p)
#define DECL_GET_RESTRICT_BASE(NODE) \
  (decl_restrict_base_lookup (VAR_DECL_CHECK (NODE)))
#define SET_DECL_RESTRICT_BASE(NODE, VAL) \
  (decl_restrict_base_insert (VAR_DECL_CHECK (NODE), (VAL)))

extern tree decl_restrict_base_lookup (tree);
extern void decl_restrict_base_insert (tree, tree);

/* Used in a DECL to indicate that, even if it TREE_PUBLIC, it need
   not be put out unless it is needed in this translation unit.
   Entities like this are shared across translation units (like weak
   entities), but are guaranteed to be generated by any translation
   unit that needs them, and therefore need not be put out anywhere
   where they are not needed.  DECL_COMDAT is just a hint to the
   back-end; it is up to front-ends which set this flag to ensure
   that there will never be any harm, other than bloat, in putting out
   something which is DECL_COMDAT.  */
#define DECL_COMDAT(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.comdat_flag)

/* The name of the object as the assembler will see it (but before any
   translations made by ASM_OUTPUT_LABELREF).  Often this is the same
   as DECL_NAME.  It is an IDENTIFIER_NODE.  */
#define DECL_ASSEMBLER_NAME(NODE) decl_assembler_name (NODE)

/* Return true if NODE is a NODE that can contain a DECL_ASSEMBLER_NAME. 
   This is true of all DECL nodes except FIELD_DECL.  */
#define HAS_DECL_ASSEMBLER_NAME_P(NODE) \
  (CODE_CONTAINS_STRUCT (TREE_CODE (NODE), TS_DECL_WITH_VIS))

/* Returns nonzero if the DECL_ASSEMBLER_NAME for NODE has been set.  If zero,
   the NODE might still have a DECL_ASSEMBLER_NAME -- it just hasn't been set
   yet.  */
#define DECL_ASSEMBLER_NAME_SET_P(NODE) \
  (HAS_DECL_ASSEMBLER_NAME_P (NODE) &&  DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.assembler_name != NULL_TREE)

/* Set the DECL_ASSEMBLER_NAME for NODE to NAME.  */
#define SET_DECL_ASSEMBLER_NAME(NODE, NAME) \
  (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.assembler_name = (NAME))

/* Copy the DECL_ASSEMBLER_NAME from DECL1 to DECL2.  Note that if DECL1's
   DECL_ASSEMBLER_NAME has not yet been set, using this macro will not cause
   the DECL_ASSEMBLER_NAME of either DECL to be set.  In other words, the
   semantics of using this macro, are different than saying:

     SET_DECL_ASSEMBLER_NAME(DECL2, DECL_ASSEMBLER_NAME (DECL1))

   which will try to set the DECL_ASSEMBLER_NAME for DECL1.  */

#define COPY_DECL_ASSEMBLER_NAME(DECL1, DECL2)				\
  (DECL_ASSEMBLER_NAME_SET_P (DECL1)					\
   ? (void) SET_DECL_ASSEMBLER_NAME (DECL2,				\
				     DECL_ASSEMBLER_NAME (DECL1))	\
   : (void) 0)

/* Records the section name in a section attribute.  Used to pass
   the name from decl_attributes to make_function_rtl and make_decl_rtl.  */
#define DECL_SECTION_NAME(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.section_name)

/* Value of the decls's visibility attribute */
#define DECL_VISIBILITY(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.visibility)

/* Nonzero means that the decl had its visibility specified rather than
   being inferred.  */
#define DECL_VISIBILITY_SPECIFIED(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.visibility_specified)

/* Used in TREE_PUBLIC decls to indicate that copies of this DECL in
   multiple translation units should be merged.  */
#define DECL_ONE_ONLY(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.one_only)

struct tree_decl_with_vis GTY(())
{
 struct tree_decl_with_rtl common;
 tree assembler_name;
 tree section_name;
  
 /* Belong to VAR_DECL exclusively.  */
 unsigned defer_output:1;
 unsigned hard_register:1;
 unsigned thread_local:1;
 unsigned common_flag:1; 
 unsigned in_text_section : 1;
 unsigned gimple_formal_temp : 1;
 unsigned dllimport_flag : 1; 
 unsigned based_on_restrict_p : 1;
 /* Used by C++.  Might become a generic decl flag.  */
 unsigned shadowed_for_var_p : 1;
 
 /* Don't belong to VAR_DECL exclusively.  */
 unsigned in_system_header_flag : 1;
 unsigned weak_flag:1;
 unsigned seen_in_bind_expr : 1;
 unsigned comdat_flag : 1;
 ENUM_BITFIELD(symbol_visibility) visibility : 2;
 unsigned visibility_specified : 1;
 /* Belong to FUNCTION_DECL exclusively.  */
 unsigned one_only : 1;
 unsigned init_priority_p:1;

 /* Belongs to VAR_DECL exclusively.  */
 ENUM_BITFIELD(tls_model) tls_model : 3;
 /* 11 unused bits. */
};

/* In a VAR_DECL that's static,
   nonzero if the space is in the text section.  */
#define DECL_IN_TEXT_SECTION(NODE) (VAR_DECL_CHECK (NODE)->decl_with_vis.in_text_section)

/* Nonzero for a given ..._DECL node means that this node should be
   put in .common, if possible.  If a DECL_INITIAL is given, and it
   is not error_mark_node, then the decl cannot be put in .common.  */
#define DECL_COMMON(NODE) (DECL_WITH_VIS_CHECK (NODE)->decl_with_vis.common_flag)

/* In a VAR_DECL, nonzero if the decl is a register variable with
   an explicit asm specification.  */
#define DECL_HARD_REGISTER(NODE)  (VAR_DECL_CHECK (NODE)->decl_with_vis.hard_register)

extern tree decl_debug_expr_lookup (tree);
extern void decl_debug_expr_insert (tree, tree);
/* For VAR_DECL, this is set to either an expression that it was split
   from (if DECL_DEBUG_EXPR_IS_FROM is true), otherwise a tree_list of
   subexpressions that it was split into.  */
#define DECL_DEBUG_EXPR(NODE) \
  (decl_debug_expr_lookup (VAR_DECL_CHECK (NODE)))

#define SET_DECL_DEBUG_EXPR(NODE, VAL) \
  (decl_debug_expr_insert (VAR_DECL_CHECK (NODE), VAL))


extern unsigned short decl_init_priority_lookup (tree);
extern void decl_init_priority_insert (tree, unsigned short);

/* In a non-local VAR_DECL with static storage duration, this is the
   initialization priority.  If this value is zero, the NODE will be
   initialized at the DEFAULT_INIT_PRIORITY.  Only used by C++ FE*/

#define DECL_HAS_INIT_PRIORITY_P(NODE) \
  (VAR_DECL_CHECK (NODE)->decl_with_vis.init_priority_p)
#define DECL_INIT_PRIORITY(NODE) \
  (decl_init_priority_lookup (VAR_DECL_CHECK (NODE)))
#define SET_DECL_INIT_PRIORITY(NODE, VAL) \
  (decl_init_priority_insert (VAR_DECL_CHECK (NODE), VAL))

/* In a VAR_DECL, the model to use if the data should be allocated from
   thread-local storage.  */
#define DECL_TLS_MODEL(NODE) (VAR_DECL_CHECK (NODE)->decl_with_vis.tls_model)

/* In a VAR_DECL, nonzero if the data should be allocated from
   thread-local storage.  */
#define DECL_THREAD_LOCAL_P(NODE) \
  (VAR_DECL_CHECK (NODE)->decl_with_vis.tls_model != TLS_MODEL_NONE)

struct tree_var_decl GTY(())
{
  struct tree_decl_with_vis common;
};


/* This field is used to reference anything in decl.result and is meant only
   for use by the garbage collector.  */
#define DECL_RESULT_FLD(NODE) (DECL_NON_COMMON_CHECK (NODE)->decl_non_common.result)

/* The DECL_VINDEX is used for FUNCTION_DECLS in two different ways.
   Before the struct containing the FUNCTION_DECL is laid out,
   DECL_VINDEX may point to a FUNCTION_DECL in a base class which
   is the FUNCTION_DECL which this FUNCTION_DECL will replace as a virtual
   function.  When the class is laid out, this pointer is changed
   to an INTEGER_CST node which is suitable for use as an index
   into the virtual function table.  
   C++ also uses this field in namespaces, hence the DECL_NON_COMMON_CHECK.  */
#define DECL_VINDEX(NODE) (DECL_NON_COMMON_CHECK (NODE)->decl_non_common.vindex)

struct tree_decl_non_common GTY(())

{
  struct tree_decl_with_vis common;
  /* C++ uses this in namespaces.  */
  tree saved_tree;
  /* C++ uses this in templates.  */
  tree arguments;	
  /* Almost all FE's use this.  */
  tree result; 
  /* C++ uses this in namespaces.  */
  tree vindex;
};

/* In FUNCTION_DECL, holds the decl for the return value.  */
#define DECL_RESULT(NODE) (FUNCTION_DECL_CHECK (NODE)->decl_non_common.result)

/* In a FUNCTION_DECL, nonzero if the function cannot be inlined.  */
#define DECL_UNINLINABLE(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.uninlinable)

/* In a FUNCTION_DECL, the saved representation of the body of the
   entire function.  */
#define DECL_SAVED_TREE(NODE) (FUNCTION_DECL_CHECK (NODE)->decl_non_common.saved_tree)

/* Nonzero in a FUNCTION_DECL means this function should be treated
   as if it were a malloc, meaning it returns a pointer that is
   not an alias.  */
#define DECL_IS_MALLOC(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.malloc_flag)

/* Nonzero in a FUNCTION_DECL means this function may return more
   than once.  */
#define DECL_IS_RETURNS_TWICE(NODE) \
  (FUNCTION_DECL_CHECK (NODE)->function_decl.returns_twice_flag)

/* Nonzero in a FUNCTION_DECL means this function should be treated
   as "pure" function (like const function, but may read global memory).  */
#define DECL_IS_PURE(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.pure_flag)

/* Nonzero in a FUNCTION_DECL means this function should be treated
   as "novops" function (function that does not read global memory,
   but may have arbitrary side effects).  */
#define DECL_IS_NOVOPS(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.novops_flag)

/* Used in FUNCTION_DECLs to indicate that they should be run automatically
   at the beginning or end of execution.  */
#define DECL_STATIC_CONSTRUCTOR(NODE) \
  (FUNCTION_DECL_CHECK (NODE)->function_decl.static_ctor_flag)

#define DECL_STATIC_DESTRUCTOR(NODE) \
(FUNCTION_DECL_CHECK (NODE)->function_decl.static_dtor_flag)

/* Used in FUNCTION_DECLs to indicate that function entry and exit should
   be instrumented with calls to support routines.  */
#define DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT(NODE) \
  (FUNCTION_DECL_CHECK (NODE)->function_decl.no_instrument_function_entry_exit)

/* Used in FUNCTION_DECLs to indicate that limit-stack-* should be
   disabled in this function.  */
#define DECL_NO_LIMIT_STACK(NODE) \
  (FUNCTION_DECL_CHECK (NODE)->function_decl.no_limit_stack)

/* In a FUNCTION_DECL with a nonzero DECL_CONTEXT, indicates that a
   static chain is not needed.  */
#define DECL_NO_STATIC_CHAIN(NODE) \
  (FUNCTION_DECL_CHECK (NODE)->function_decl.regdecl_flag)

/* Nonzero for a decl that cgraph has decided should be inlined into
   at least one call site.  It is not meaningful to look at this
   directly; always use cgraph_function_possibly_inlined_p.  */
#define DECL_POSSIBLY_INLINED(DECL) \
  FUNCTION_DECL_CHECK (DECL)->function_decl.possibly_inlined

/* Nonzero in a FUNCTION_DECL means this function can be substituted
   where it is called.  */
#define DECL_INLINE(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.inline_flag)

/* Nonzero in a FUNCTION_DECL means that this function was declared inline,
   such as via the `inline' keyword in C/C++.  This flag controls the linkage
   semantics of 'inline'; whether or not the function is inlined is
   controlled by DECL_INLINE.  */
#define DECL_DECLARED_INLINE_P(NODE) \
  (FUNCTION_DECL_CHECK (NODE)->function_decl.declared_inline_flag)

/* For FUNCTION_DECL, this holds a pointer to a structure ("struct function")
   that describes the status of this function.  */
#define DECL_STRUCT_FUNCTION(NODE) (FUNCTION_DECL_CHECK (NODE)->function_decl.f)

/* In a FUNCTION_DECL, nonzero means a built in function.  */
#define DECL_BUILT_IN(NODE) (DECL_BUILT_IN_CLASS (NODE) != NOT_BUILT_IN)

/* For a builtin function, identify which part of the compiler defined it.  */
#define DECL_BUILT_IN_CLASS(NODE) \
   (FUNCTION_DECL_CHECK (NODE)->function_decl.built_in_class)

/* In FUNCTION_DECL, a chain of ..._DECL nodes.
   VAR_DECL and PARM_DECL reserve the arguments slot for language-specific
   uses.  */
#define DECL_ARGUMENTS(NODE) (FUNCTION_DECL_CHECK (NODE)->decl_non_common.arguments)
#define DECL_ARGUMENT_FLD(NODE) (DECL_NON_COMMON_CHECK (NODE)->decl_non_common.arguments)

/* FUNCTION_DECL inherits from DECL_NON_COMMON because of the use of the
   arguments/result/saved_tree fields by front ends.   It was either inherit
   FUNCTION_DECL from non_common, or inherit non_common from FUNCTION_DECL,
   which seemed a bit strange.  */

struct tree_function_decl GTY(())
{
  struct tree_decl_non_common common;
  
  unsigned static_ctor_flag : 1;
  unsigned static_dtor_flag : 1;
  unsigned uninlinable : 1;
  unsigned possibly_inlined : 1;
  unsigned novops_flag : 1;
  unsigned returns_twice_flag : 1;
  unsigned malloc_flag : 1;
  unsigned pure_flag : 1;
  
  unsigned declared_inline_flag : 1;
  unsigned regdecl_flag : 1;
  unsigned inline_flag : 1;
  unsigned no_instrument_function_entry_exit : 1;
  unsigned no_limit_stack : 1;
  ENUM_BITFIELD(built_in_class) built_in_class : 2;

  struct function *f;
};

/* For a TYPE_DECL, holds the "original" type.  (TREE_TYPE has the copy.) */
#define DECL_ORIGINAL_TYPE(NODE) (TYPE_DECL_CHECK (NODE)->decl_non_common.result)

/* In a TYPE_DECL nonzero means the detail info about this type is not dumped
   into stabs.  Instead it will generate cross reference ('x') of names.
   This uses the same flag as DECL_EXTERNAL.  */
#define TYPE_DECL_SUPPRESS_DEBUG(NODE) \
  (TYPE_DECL_CHECK (NODE)->decl_common.decl_flag_2)

struct tree_type_decl GTY(())
{
  struct tree_decl_non_common common;

};

/* A STATEMENT_LIST chains statements together in GENERIC and GIMPLE.
   To reduce overhead, the nodes containing the statements are not trees.
   This avoids the overhead of tree_common on all linked list elements.

   Use the interface in tree-iterator.h to access this node.  */

#define STATEMENT_LIST_HEAD(NODE) \
  (STATEMENT_LIST_CHECK (NODE)->stmt_list.head)
#define STATEMENT_LIST_TAIL(NODE) \
  (STATEMENT_LIST_CHECK (NODE)->stmt_list.tail)

struct tree_statement_list_node
  GTY ((chain_next ("%h.next"), chain_prev ("%h.prev")))
{
  struct tree_statement_list_node *prev;
  struct tree_statement_list_node *next;
  tree stmt;
};

struct tree_statement_list
  GTY(())
{
  struct tree_common common;
  struct tree_statement_list_node *head;
  struct tree_statement_list_node *tail;
};

#define VALUE_HANDLE_ID(NODE)		\
  (VALUE_HANDLE_CHECK (NODE)->value_handle.id)

#define VALUE_HANDLE_EXPR_SET(NODE)	\
  (VALUE_HANDLE_CHECK (NODE)->value_handle.expr_set)

#define VALUE_HANDLE_VUSES(NODE)        \
  (VALUE_HANDLE_CHECK (NODE)->value_handle.vuses)

/* Defined and used in tree-ssa-pre.c.  */
struct value_set;

struct tree_value_handle GTY(())
{
  struct tree_common common;

  /* The set of expressions represented by this handle.  */
  struct value_set * GTY ((skip)) expr_set;

  /* Unique ID for this value handle.  IDs are handed out in a
     conveniently dense form starting at 0, so that we can make
     bitmaps of value handles.  */
  unsigned int id;

  /* Set of virtual uses represented by this handle.  */
  VEC (tree, gc) *vuses;
};

/* Define the overall contents of a tree node.
   It may be any of the structures declared above
   for various types of node.  */

union tree_node GTY ((ptr_alias (union lang_tree_node),
		      desc ("tree_node_structure (&%h)")))
{
  struct tree_common GTY ((tag ("TS_COMMON"))) common;
  struct tree_int_cst GTY ((tag ("TS_INT_CST"))) int_cst;
  struct tree_real_cst GTY ((tag ("TS_REAL_CST"))) real_cst;
  struct tree_vector GTY ((tag ("TS_VECTOR"))) vector;
  struct tree_string GTY ((tag ("TS_STRING"))) string;
  struct tree_complex GTY ((tag ("TS_COMPLEX"))) complex;
  struct tree_identifier GTY ((tag ("TS_IDENTIFIER"))) identifier;
  struct tree_decl_minimal GTY((tag ("TS_DECL_MINIMAL"))) decl_minimal;
  struct tree_decl_common GTY ((tag ("TS_DECL_COMMON"))) decl_common;
  struct tree_decl_with_rtl GTY ((tag ("TS_DECL_WRTL"))) decl_with_rtl;
  struct tree_decl_non_common  GTY ((tag ("TS_DECL_NON_COMMON"))) decl_non_common;
  struct tree_parm_decl  GTY  ((tag ("TS_PARM_DECL"))) parm_decl;
  struct tree_decl_with_vis GTY ((tag ("TS_DECL_WITH_VIS"))) decl_with_vis;
  struct tree_var_decl GTY ((tag ("TS_VAR_DECL"))) var_decl;
  struct tree_field_decl GTY ((tag ("TS_FIELD_DECL"))) field_decl;
  struct tree_label_decl GTY ((tag ("TS_LABEL_DECL"))) label_decl;
  struct tree_result_decl GTY ((tag ("TS_RESULT_DECL"))) result_decl;
  struct tree_const_decl GTY ((tag ("TS_CONST_DECL"))) const_decl;
  struct tree_type_decl GTY ((tag ("TS_TYPE_DECL"))) type_decl;
  struct tree_function_decl GTY ((tag ("TS_FUNCTION_DECL"))) function_decl;
  struct tree_type GTY ((tag ("TS_TYPE"))) type;
  struct tree_list GTY ((tag ("TS_LIST"))) list;
  struct tree_vec GTY ((tag ("TS_VEC"))) vec;
  struct tree_exp GTY ((tag ("TS_EXP"))) exp;
  struct tree_ssa_name GTY ((tag ("TS_SSA_NAME"))) ssa_name;
  struct tree_phi_node GTY ((tag ("TS_PHI_NODE"))) phi;
  struct tree_block GTY ((tag ("TS_BLOCK"))) block;
  struct tree_binfo GTY ((tag ("TS_BINFO"))) binfo;
  struct tree_statement_list GTY ((tag ("TS_STATEMENT_LIST"))) stmt_list;
  struct tree_value_handle GTY ((tag ("TS_VALUE_HANDLE"))) value_handle;
  struct tree_constructor GTY ((tag ("TS_CONSTRUCTOR"))) constructor;
  struct tree_memory_tag GTY ((tag ("TS_MEMORY_TAG"))) mtag;
  struct tree_struct_field_tag GTY ((tag ("TS_STRUCT_FIELD_TAG"))) sft; 
  struct tree_omp_clause GTY ((tag ("TS_OMP_CLAUSE"))) omp_clause;
};

/* Standard named or nameless data types of the C compiler.  */

enum tree_index
{
  TI_ERROR_MARK,
  TI_INTQI_TYPE,
  TI_INTHI_TYPE,
  TI_INTSI_TYPE,
  TI_INTDI_TYPE,
  TI_INTTI_TYPE,

  TI_UINTQI_TYPE,
  TI_UINTHI_TYPE,
  TI_UINTSI_TYPE,
  TI_UINTDI_TYPE,
  TI_UINTTI_TYPE,

  TI_INTEGER_ZERO,
  TI_INTEGER_ONE,
  TI_INTEGER_MINUS_ONE,
  TI_NULL_POINTER,

  TI_SIZE_ZERO,
  TI_SIZE_ONE,

  TI_BITSIZE_ZERO,
  TI_BITSIZE_ONE,
  TI_BITSIZE_UNIT,

  TI_PUBLIC,
  TI_PROTECTED,
  TI_PRIVATE,

  TI_BOOLEAN_FALSE,
  TI_BOOLEAN_TRUE,

  TI_COMPLEX_INTEGER_TYPE,
  TI_COMPLEX_FLOAT_TYPE,
  TI_COMPLEX_DOUBLE_TYPE,
  TI_COMPLEX_LONG_DOUBLE_TYPE,

  TI_FLOAT_TYPE,
  TI_DOUBLE_TYPE,
  TI_LONG_DOUBLE_TYPE,

  TI_FLOAT_PTR_TYPE,
  TI_DOUBLE_PTR_TYPE,
  TI_LONG_DOUBLE_PTR_TYPE,
  TI_INTEGER_PTR_TYPE,

  TI_VOID_TYPE,
  TI_PTR_TYPE,
  TI_CONST_PTR_TYPE,
  TI_SIZE_TYPE,
  TI_PID_TYPE,
  TI_PTRDIFF_TYPE,
  TI_VA_LIST_TYPE,
  TI_VA_LIST_GPR_COUNTER_FIELD,
  TI_VA_LIST_FPR_COUNTER_FIELD,
  TI_BOOLEAN_TYPE,
  TI_FILEPTR_TYPE,

  TI_DFLOAT32_TYPE,
  TI_DFLOAT64_TYPE,
  TI_DFLOAT128_TYPE,
  TI_DFLOAT32_PTR_TYPE,
  TI_DFLOAT64_PTR_TYPE,
  TI_DFLOAT128_PTR_TYPE,

  TI_VOID_LIST_NODE,

  TI_MAIN_IDENTIFIER,

  TI_MAX
};

extern GTY(()) tree global_trees[TI_MAX];

#define error_mark_node			global_trees[TI_ERROR_MARK]

#define intQI_type_node			global_trees[TI_INTQI_TYPE]
#define intHI_type_node			global_trees[TI_INTHI_TYPE]
#define intSI_type_node			global_trees[TI_INTSI_TYPE]
#define intDI_type_node			global_trees[TI_INTDI_TYPE]
#define intTI_type_node			global_trees[TI_INTTI_TYPE]

#define unsigned_intQI_type_node	global_trees[TI_UINTQI_TYPE]
#define unsigned_intHI_type_node	global_trees[TI_UINTHI_TYPE]
#define unsigned_intSI_type_node	global_trees[TI_UINTSI_TYPE]
#define unsigned_intDI_type_node	global_trees[TI_UINTDI_TYPE]
#define unsigned_intTI_type_node	global_trees[TI_UINTTI_TYPE]

#define integer_zero_node		global_trees[TI_INTEGER_ZERO]
#define integer_one_node		global_trees[TI_INTEGER_ONE]
#define integer_minus_one_node		global_trees[TI_INTEGER_MINUS_ONE]
#define size_zero_node			global_trees[TI_SIZE_ZERO]
#define size_one_node			global_trees[TI_SIZE_ONE]
#define bitsize_zero_node		global_trees[TI_BITSIZE_ZERO]
#define bitsize_one_node		global_trees[TI_BITSIZE_ONE]
#define bitsize_unit_node		global_trees[TI_BITSIZE_UNIT]

/* Base access nodes.  */
#define access_public_node		global_trees[TI_PUBLIC]
#define access_protected_node	        global_trees[TI_PROTECTED]
#define access_private_node		global_trees[TI_PRIVATE]

#define null_pointer_node		global_trees[TI_NULL_POINTER]

#define float_type_node			global_trees[TI_FLOAT_TYPE]
#define double_type_node		global_trees[TI_DOUBLE_TYPE]
#define long_double_type_node		global_trees[TI_LONG_DOUBLE_TYPE]

#define float_ptr_type_node		global_trees[TI_FLOAT_PTR_TYPE]
#define double_ptr_type_node		global_trees[TI_DOUBLE_PTR_TYPE]
#define long_double_ptr_type_node	global_trees[TI_LONG_DOUBLE_PTR_TYPE]
#define integer_ptr_type_node		global_trees[TI_INTEGER_PTR_TYPE]

#define complex_integer_type_node	global_trees[TI_COMPLEX_INTEGER_TYPE]
#define complex_float_type_node		global_trees[TI_COMPLEX_FLOAT_TYPE]
#define complex_double_type_node	global_trees[TI_COMPLEX_DOUBLE_TYPE]
#define complex_long_double_type_node	global_trees[TI_COMPLEX_LONG_DOUBLE_TYPE]

#define void_type_node			global_trees[TI_VOID_TYPE]
/* The C type `void *'.  */
#define ptr_type_node			global_trees[TI_PTR_TYPE]
/* The C type `const void *'.  */
#define const_ptr_type_node		global_trees[TI_CONST_PTR_TYPE]
/* The C type `size_t'.  */
#define size_type_node                  global_trees[TI_SIZE_TYPE]
#define pid_type_node                   global_trees[TI_PID_TYPE]
#define ptrdiff_type_node		global_trees[TI_PTRDIFF_TYPE]
#define va_list_type_node		global_trees[TI_VA_LIST_TYPE]
#define va_list_gpr_counter_field	global_trees[TI_VA_LIST_GPR_COUNTER_FIELD]
#define va_list_fpr_counter_field	global_trees[TI_VA_LIST_FPR_COUNTER_FIELD]
/* The C type `FILE *'.  */
#define fileptr_type_node		global_trees[TI_FILEPTR_TYPE]

#define boolean_type_node		global_trees[TI_BOOLEAN_TYPE]
#define boolean_false_node		global_trees[TI_BOOLEAN_FALSE]
#define boolean_true_node		global_trees[TI_BOOLEAN_TRUE]

/* The decimal floating point types. */
#define dfloat32_type_node              global_trees[TI_DFLOAT32_TYPE]
#define dfloat64_type_node              global_trees[TI_DFLOAT64_TYPE]
#define dfloat128_type_node             global_trees[TI_DFLOAT128_TYPE]
#define dfloat32_ptr_type_node          global_trees[TI_DFLOAT32_PTR_TYPE]
#define dfloat64_ptr_type_node          global_trees[TI_DFLOAT64_PTR_TYPE]
#define dfloat128_ptr_type_node         global_trees[TI_DFLOAT128_PTR_TYPE]

/* The node that should be placed at the end of a parameter list to
   indicate that the function does not take a variable number of
   arguments.  The TREE_VALUE will be void_type_node and there will be
   no TREE_CHAIN.  Language-independent code should not assume
   anything else about this node.  */
#define void_list_node                  global_trees[TI_VOID_LIST_NODE]

#define main_identifier_node		global_trees[TI_MAIN_IDENTIFIER]
#define MAIN_NAME_P(NODE) (IDENTIFIER_NODE_CHECK (NODE) == main_identifier_node)

/* An enumeration of the standard C integer types.  These must be
   ordered so that shorter types appear before longer ones, and so
   that signed types appear before unsigned ones, for the correct
   functioning of interpret_integer() in c-lex.c.  */
enum integer_type_kind
{
  itk_char,
  itk_signed_char,
  itk_unsigned_char,
  itk_short,
  itk_unsigned_short,
  itk_int,
  itk_unsigned_int,
  itk_long,
  itk_unsigned_long,
  itk_long_long,
  itk_unsigned_long_long,
  itk_none
};

typedef enum integer_type_kind integer_type_kind;

/* The standard C integer types.  Use integer_type_kind to index into
   this array.  */
extern GTY(()) tree integer_types[itk_none];

#define char_type_node			integer_types[itk_char]
#define signed_char_type_node		integer_types[itk_signed_char]
#define unsigned_char_type_node		integer_types[itk_unsigned_char]
#define short_integer_type_node		integer_types[itk_short]
#define short_unsigned_type_node	integer_types[itk_unsigned_short]
#define integer_type_node		integer_types[itk_int]
#define unsigned_type_node		integer_types[itk_unsigned_int]
#define long_integer_type_node		integer_types[itk_long]
#define long_unsigned_type_node		integer_types[itk_unsigned_long]
#define long_long_integer_type_node	integer_types[itk_long_long]
#define long_long_unsigned_type_node	integer_types[itk_unsigned_long_long]

/* Set to the default thread-local storage (tls) model to use.  */

extern enum tls_model flag_tls_default;


/* A pointer-to-function member type looks like:

     struct {
       __P __pfn;
       ptrdiff_t __delta;
     };

   If __pfn is NULL, it is a NULL pointer-to-member-function.

   (Because the vtable is always the first thing in the object, we
   don't need its offset.)  If the function is virtual, then PFN is
   one plus twice the index into the vtable; otherwise, it is just a
   pointer to the function.

   Unfortunately, using the lowest bit of PFN doesn't work in
   architectures that don't impose alignment requirements on function
   addresses, or that use the lowest bit to tell one ISA from another,
   for example.  For such architectures, we use the lowest bit of
   DELTA instead of the lowest bit of the PFN, and DELTA will be
   multiplied by 2.  */

enum ptrmemfunc_vbit_where_t
{
  ptrmemfunc_vbit_in_pfn,
  ptrmemfunc_vbit_in_delta
};

#define NULL_TREE (tree) NULL

extern tree decl_assembler_name (tree);

/* Compute the number of bytes occupied by 'node'.  This routine only
   looks at TREE_CODE and, if the code is TREE_VEC, TREE_VEC_LENGTH.  */

extern size_t tree_size (tree);

/* Compute the number of bytes occupied by a tree with code CODE.  This
   function cannot be used for TREE_VEC or PHI_NODE codes, which are of
   variable length.  */
extern size_t tree_code_size (enum tree_code);

/* Lowest level primitive for allocating a node.
   The TREE_CODE is the only argument.  Contents are initialized
   to zero except for a few of the common fields.  */

extern tree make_node_stat (enum tree_code MEM_STAT_DECL);
#define make_node(t) make_node_stat (t MEM_STAT_INFO)

/* Make a copy of a node, with all the same contents.  */

extern tree copy_node_stat (tree MEM_STAT_DECL);
#define copy_node(t) copy_node_stat (t MEM_STAT_INFO)

/* Make a copy of a chain of TREE_LIST nodes.  */

extern tree copy_list (tree);

/* Make a BINFO.  */
extern tree make_tree_binfo_stat (unsigned MEM_STAT_DECL);
#define make_tree_binfo(t) make_tree_binfo_stat (t MEM_STAT_INFO)

/* Make a TREE_VEC.  */

extern tree make_tree_vec_stat (int MEM_STAT_DECL);
#define make_tree_vec(t) make_tree_vec_stat (t MEM_STAT_INFO)

/* Tree nodes for SSA analysis.  */

extern void init_phinodes (void);
extern void fini_phinodes (void);
extern void release_phi_node (tree);
#ifdef GATHER_STATISTICS
extern void phinodes_print_statistics (void);
#endif

extern void init_ssanames (void);
extern void fini_ssanames (void);
extern tree make_ssa_name (tree, tree);
extern tree duplicate_ssa_name (tree, tree);
extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
extern void release_ssa_name (tree);
extern void release_defs (tree);
extern void replace_ssa_name_symbol (tree, tree);

#ifdef GATHER_STATISTICS
extern void ssanames_print_statistics (void);
#endif

/* Return the (unique) IDENTIFIER_NODE node for a given name.
   The name is supplied as a char *.  */

extern tree get_identifier (const char *);

#if GCC_VERSION >= 3000
#define get_identifier(str) \
  (__builtin_constant_p (str)				\
    ? get_identifier_with_length ((str), strlen (str))  \
    : get_identifier (str))
#endif


/* Identical to get_identifier, except that the length is assumed
   known.  */

extern tree get_identifier_with_length (const char *, size_t);

/* If an identifier with the name TEXT (a null-terminated string) has
   previously been referred to, return that node; otherwise return
   NULL_TREE.  */

extern tree maybe_get_identifier (const char *);

/* Construct various types of nodes.  */

extern tree build_nt (enum tree_code, ...);

extern tree build0_stat (enum tree_code, tree MEM_STAT_DECL);
#define build0(c,t) build0_stat (c,t MEM_STAT_INFO)
extern tree build1_stat (enum tree_code, tree, tree MEM_STAT_DECL);
#define build1(c,t1,t2) build1_stat (c,t1,t2 MEM_STAT_INFO)
extern tree build2_stat (enum tree_code, tree, tree, tree MEM_STAT_DECL);
#define build2(c,t1,t2,t3) build2_stat (c,t1,t2,t3 MEM_STAT_INFO)
extern tree build3_stat (enum tree_code, tree, tree, tree, tree MEM_STAT_DECL);
#define build3(c,t1,t2,t3,t4) build3_stat (c,t1,t2,t3,t4 MEM_STAT_INFO)
extern tree build4_stat (enum tree_code, tree, tree, tree, tree,
			 tree MEM_STAT_DECL);
#define build4(c,t1,t2,t3,t4,t5) build4_stat (c,t1,t2,t3,t4,t5 MEM_STAT_INFO)
extern tree build5_stat (enum tree_code, tree, tree, tree, tree, tree,
			 tree MEM_STAT_DECL);
#define build5(c,t1,t2,t3,t4,t5,t6) build5_stat (c,t1,t2,t3,t4,t5,t6 MEM_STAT_INFO)
extern tree build7_stat (enum tree_code, tree, tree, tree, tree, tree,
			 tree, tree, tree MEM_STAT_DECL);
#define build7(c,t1,t2,t3,t4,t5,t6,t7,t8) \
  build7_stat (c,t1,t2,t3,t4,t5,t6,t7,t8 MEM_STAT_INFO)

extern tree build_int_cst (tree, HOST_WIDE_INT);
extern tree build_int_cst_type (tree, HOST_WIDE_INT);
extern tree build_int_cstu (tree, unsigned HOST_WIDE_INT);
extern tree build_int_cst_wide (tree, unsigned HOST_WIDE_INT, HOST_WIDE_INT);
extern tree build_vector (tree, tree);
extern tree build_vector_from_ctor (tree, VEC(constructor_elt,gc) *);
extern tree build_constructor (tree, VEC(constructor_elt,gc) *);
extern tree build_constructor_single (tree, tree, tree);
extern tree build_constructor_from_list (tree, tree);
extern tree build_real_from_int_cst (tree, tree);
extern tree build_complex (tree, tree, tree);
extern tree build_string (int, const char *);
extern tree build_tree_list_stat (tree, tree MEM_STAT_DECL);
#define build_tree_list(t,q) build_tree_list_stat(t,q MEM_STAT_INFO)
extern tree build_decl_stat (enum tree_code, tree, tree MEM_STAT_DECL);
extern tree build_fn_decl (const char *, tree); 
#define build_decl(c,t,q) build_decl_stat (c,t,q MEM_STAT_INFO)
extern tree build_block (tree, tree, tree, tree);
#ifndef USE_MAPPED_LOCATION
extern void annotate_with_file_line (tree, const char *, int);
extern void annotate_with_locus (tree, location_t);
#endif
extern tree build_empty_stmt (void);
extern tree build_omp_clause (enum omp_clause_code);

/* Construct various nodes representing data types.  */

extern tree make_signed_type (int);
extern tree make_unsigned_type (int);
extern tree signed_type_for (tree);
extern tree unsigned_type_for (tree);
extern void initialize_sizetypes (bool);
extern void set_sizetype (tree);
extern void fixup_unsigned_type (tree);
extern tree build_pointer_type_for_mode (tree, enum machine_mode, bool);
extern tree build_pointer_type (tree);
extern tree build_reference_type_for_mode (tree, enum machine_mode, bool);
extern tree build_reference_type (tree);
extern tree build_vector_type_for_mode (tree, enum machine_mode);
extern tree build_vector_type (tree innertype, int nunits);
extern tree build_type_no_quals (tree);
extern tree build_index_type (tree);
extern tree build_index_2_type (tree, tree);
extern tree build_array_type (tree, tree);
extern tree build_function_type (tree, tree);
extern tree build_function_type_list (tree, ...);
extern tree build_method_type_directly (tree, tree, tree);
extern tree build_method_type (tree, tree);
extern tree build_offset_type (tree, tree);
extern tree build_complex_type (tree);
extern tree build_resx (int);
extern tree array_type_nelts (tree);
extern bool in_array_bounds_p (tree);

extern tree value_member (tree, tree);
extern tree purpose_member (tree, tree);

extern int attribute_list_equal (tree, tree);
extern int attribute_list_contained (tree, tree);
extern int tree_int_cst_equal (tree, tree);
extern int tree_int_cst_lt (tree, tree);
extern int tree_int_cst_compare (tree, tree);
extern int host_integerp (tree, int);
extern HOST_WIDE_INT tree_low_cst (tree, int);
extern int tree_int_cst_msb (tree);
extern int tree_int_cst_sgn (tree);
extern int tree_int_cst_sign_bit (tree);
extern int tree_expr_nonnegative_p (tree);
extern bool may_negate_without_overflow_p (tree);
extern tree get_inner_array_type (tree);

/* From expmed.c.  Since rtl.h is included after tree.h, we can't
   put the prototype here.  Rtl.h does declare the prototype if
   tree.h had been included.  */

extern tree make_tree (tree, rtx);

/* Return a type like TTYPE except that its TYPE_ATTRIBUTES
   is ATTRIBUTE.

   Such modified types already made are recorded so that duplicates
   are not made.  */

extern tree build_type_attribute_variant (tree, tree);
extern tree build_decl_attribute_variant (tree, tree);

/* Structure describing an attribute and a function to handle it.  */
struct attribute_spec
{
  /* The name of the attribute (without any leading or trailing __),
     or NULL to mark the end of a table of attributes.  */
  const char *const name;
  /* The minimum length of the list of arguments of the attribute.  */
  const int min_length;
  /* The maximum length of the list of arguments of the attribute
     (-1 for no maximum).  */
  const int max_length;
  /* Whether this attribute requires a DECL.  If it does, it will be passed
     from types of DECLs, function return types and array element types to
     the DECLs, function types and array types respectively; but when
     applied to a type in any other circumstances, it will be ignored with
     a warning.  (If greater control is desired for a given attribute,
     this should be false, and the flags argument to the handler may be
     used to gain greater control in that case.)  */
  const bool decl_required;
  /* Whether this attribute requires a type.  If it does, it will be passed
     from a DECL to the type of that DECL.  */
  const bool type_required;
  /* Whether this attribute requires a function (or method) type.  If it does,
     it will be passed from a function pointer type to the target type,
     and from a function return type (which is not itself a function
     pointer type) to the function type.  */
  const bool function_type_required;
  /* Function to handle this attribute.  NODE points to the node to which
     the attribute is to be applied.  If a DECL, it should be modified in
     place; if a TYPE, a copy should be created.  NAME is the name of the
     attribute (possibly with leading or trailing __).  ARGS is the TREE_LIST
     of the arguments (which may be NULL).  FLAGS gives further information
     about the context of the attribute.  Afterwards, the attributes will
     be added to the DECL_ATTRIBUTES or TYPE_ATTRIBUTES, as appropriate,
     unless *NO_ADD_ATTRS is set to true (which should be done on error,
     as well as in any other cases when the attributes should not be added
     to the DECL or TYPE).  Depending on FLAGS, any attributes to be
     applied to another type or DECL later may be returned;
     otherwise the return value should be NULL_TREE.  This pointer may be
     NULL if no special handling is required beyond the checks implied
     by the rest of this structure.  */
  tree (*const handler) (tree *node, tree name, tree args,
				 int flags, bool *no_add_attrs);
};

/* Flags that may be passed in the third argument of decl_attributes, and
   to handler functions for attributes.  */
enum attribute_flags
{
  /* The type passed in is the type of a DECL, and any attributes that
     should be passed in again to be applied to the DECL rather than the
     type should be returned.  */
  ATTR_FLAG_DECL_NEXT = 1,
  /* The type passed in is a function return type, and any attributes that
     should be passed in again to be applied to the function type rather
     than the return type should be returned.  */
  ATTR_FLAG_FUNCTION_NEXT = 2,
  /* The type passed in is an array element type, and any attributes that
     should be passed in again to be applied to the array type rather
     than the element type should be returned.  */
  ATTR_FLAG_ARRAY_NEXT = 4,
  /* The type passed in is a structure, union or enumeration type being
     created, and should be modified in place.  */
  ATTR_FLAG_TYPE_IN_PLACE = 8,
  /* The attributes are being applied by default to a library function whose
     name indicates known behavior, and should be silently ignored if they
     are not in fact compatible with the function type.  */
  ATTR_FLAG_BUILT_IN = 16
};

/* Default versions of target-overridable functions.  */

extern tree merge_decl_attributes (tree, tree);
extern tree merge_type_attributes (tree, tree);

/* Given a tree node and a string, return nonzero if the tree node is
   a valid attribute name for the string.  */

extern int is_attribute_p (const char *, tree);

/* Given an attribute name and a list of attributes, return the list element
   of the attribute or NULL_TREE if not found.  */

extern tree lookup_attribute (const char *, tree);

/* Given two attributes lists, return a list of their union.  */

extern tree merge_attributes (tree, tree);

#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
/* Given two Windows decl attributes lists, possibly including
   dllimport, return a list of their union .  */
extern tree merge_dllimport_decl_attributes (tree, tree);

/* Handle a "dllimport" or "dllexport" attribute.  */
extern tree handle_dll_attribute (tree *, tree, tree, int, bool *);
#endif

/* Check whether CAND is suitable to be returned from get_qualified_type
   (BASE, TYPE_QUALS).  */

extern bool check_qualified_type (tree, tree, int);

/* Return a version of the TYPE, qualified as indicated by the
   TYPE_QUALS, if one exists.  If no qualified version exists yet,
   return NULL_TREE.  */

extern tree get_qualified_type (tree, int);

/* Like get_qualified_type, but creates the type if it does not
   exist.  This function never returns NULL_TREE.  */

extern tree build_qualified_type (tree, int);

/* Like build_qualified_type, but only deals with the `const' and
   `volatile' qualifiers.  This interface is retained for backwards
   compatibility with the various front-ends; new code should use
   build_qualified_type instead.  */

#define build_type_variant(TYPE, CONST_P, VOLATILE_P)			\
  build_qualified_type ((TYPE),						\
			((CONST_P) ? TYPE_QUAL_CONST : 0)		\
			| ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))

/* Make a copy of a type node.  */

extern tree build_distinct_type_copy (tree);
extern tree build_variant_type_copy (tree);

/* Finish up a builtin RECORD_TYPE. Give it a name and provide its
   fields. Optionally specify an alignment, and then lay it out.  */

extern void finish_builtin_struct (tree, const char *,
							 tree, tree);

/* Given a ..._TYPE node, calculate the TYPE_SIZE, TYPE_SIZE_UNIT,
   TYPE_ALIGN and TYPE_MODE fields.  If called more than once on one
   node, does nothing except for the first time.  */

extern void layout_type (tree);

/* These functions allow a front-end to perform a manual layout of a
   RECORD_TYPE.  (For instance, if the placement of subsequent fields
   depends on the placement of fields so far.)  Begin by calling
   start_record_layout.  Then, call place_field for each of the
   fields.  Then, call finish_record_layout.  See layout_type for the
   default way in which these functions are used.  */

typedef struct record_layout_info_s
{
  /* The RECORD_TYPE that we are laying out.  */
  tree t;
  /* The offset into the record so far, in bytes, not including bits in
     BITPOS.  */
  tree offset;
  /* The last known alignment of SIZE.  */
  unsigned int offset_align;
  /* The bit position within the last OFFSET_ALIGN bits, in bits.  */
  tree bitpos;
  /* The alignment of the record so far, in bits.  */
  unsigned int record_align;
  /* The alignment of the record so far, ignoring #pragma pack and
     __attribute__ ((packed)), in bits.  */
  unsigned int unpacked_align;
  /* The previous field layed out.  */
  tree prev_field;
  /* The static variables (i.e., class variables, as opposed to
     instance variables) encountered in T.  */
  tree pending_statics;
  /* Bits remaining in the current alignment group */
  int remaining_in_alignment;
  /* True if prev_field was packed and we haven't found any non-packed
     fields that we have put in the same alignment group.  */
  int prev_packed;
  /* True if we've seen a packed field that didn't have normal
     alignment anyway.  */
  int packed_maybe_necessary;
} *record_layout_info;

extern void set_lang_adjust_rli (void (*) (record_layout_info));
extern record_layout_info start_record_layout (tree);
extern tree bit_from_pos (tree, tree);
extern tree byte_from_pos (tree, tree);
extern void pos_from_bit (tree *, tree *, unsigned int, tree);
extern void normalize_offset (tree *, tree *, unsigned int);
extern tree rli_size_unit_so_far (record_layout_info);
extern tree rli_size_so_far (record_layout_info);
extern void normalize_rli (record_layout_info);
extern void place_field (record_layout_info, tree);
extern void compute_record_mode (tree);
extern void finish_record_layout (record_layout_info, int);

/* Given a hashcode and a ..._TYPE node (for which the hashcode was made),
   return a canonicalized ..._TYPE node, so that duplicates are not made.
   How the hash code is computed is up to the caller, as long as any two
   callers that could hash identical-looking type nodes agree.  */

extern tree type_hash_canon (unsigned int, tree);

/* Given a VAR_DECL, PARM_DECL, RESULT_DECL or FIELD_DECL node,
   calculates the DECL_SIZE, DECL_SIZE_UNIT, DECL_ALIGN and DECL_MODE
   fields.  Call this only once for any given decl node.

   Second argument is the boundary that this field can be assumed to
   be starting at (in bits).  Zero means it can be assumed aligned
   on any boundary that may be needed.  */

extern void layout_decl (tree, unsigned);

/* Given a VAR_DECL, PARM_DECL or RESULT_DECL, clears the results of
   a previous call to layout_decl and calls it again.  */

extern void relayout_decl (tree);

/* Return the mode for data of a given size SIZE and mode class CLASS.
   If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
   The value is BLKmode if no other mode is found.  This is like
   mode_for_size, but is passed a tree.  */

extern enum machine_mode mode_for_size_tree (tree, enum mode_class, int);

/* Return an expr equal to X but certainly not valid as an lvalue.  */

extern tree non_lvalue (tree);

extern tree convert (tree, tree);
extern unsigned int expr_align (tree);
extern tree expr_first (tree);
extern tree expr_last (tree);
extern tree expr_only (tree);
extern tree size_in_bytes (tree);
extern HOST_WIDE_INT int_size_in_bytes (tree);
extern tree bit_position (tree);
extern HOST_WIDE_INT int_bit_position (tree);
extern tree byte_position (tree);
extern HOST_WIDE_INT int_byte_position (tree);

/* Define data structures, macros, and functions for handling sizes
   and the various types used to represent sizes.  */

enum size_type_kind
{
  SIZETYPE,		/* Normal representation of sizes in bytes.  */
  SSIZETYPE,		/* Signed representation of sizes in bytes.  */
  BITSIZETYPE,		/* Normal representation of sizes in bits.  */
  SBITSIZETYPE,		/* Signed representation of sizes in bits.  */
  TYPE_KIND_LAST};

extern GTY(()) tree sizetype_tab[(int) TYPE_KIND_LAST];

#define sizetype sizetype_tab[(int) SIZETYPE]
#define bitsizetype sizetype_tab[(int) BITSIZETYPE]
#define ssizetype sizetype_tab[(int) SSIZETYPE]
#define sbitsizetype sizetype_tab[(int) SBITSIZETYPE]

extern tree size_int_kind (HOST_WIDE_INT, enum size_type_kind);
extern tree size_binop (enum tree_code, tree, tree);
extern tree size_diffop (tree, tree);

#define size_int(L) size_int_kind (L, SIZETYPE)
#define ssize_int(L) size_int_kind (L, SSIZETYPE)
#define bitsize_int(L) size_int_kind (L, BITSIZETYPE)
#define sbitsize_int(L) size_int_kind (L, SBITSIZETYPE)

extern tree round_up (tree, int);
extern tree round_down (tree, int);
extern tree get_pending_sizes (void);
extern void put_pending_size (tree);
extern void put_pending_sizes (tree);

/* Type for sizes of data-type.  */

#define BITS_PER_UNIT_LOG \
  ((BITS_PER_UNIT > 1) + (BITS_PER_UNIT > 2) + (BITS_PER_UNIT > 4) \
   + (BITS_PER_UNIT > 8) + (BITS_PER_UNIT > 16) + (BITS_PER_UNIT > 32) \
   + (BITS_PER_UNIT > 64) + (BITS_PER_UNIT > 128) + (BITS_PER_UNIT > 256))

/* If nonzero, an upper limit on alignment of structure fields, in bits,  */
extern unsigned int maximum_field_alignment;
/* and its original value in bytes, specified via -fpack-struct=<value>.  */
extern unsigned int initial_max_fld_align;

/* Concatenate two lists (chains of TREE_LIST nodes) X and Y
   by making the last node in X point to Y.
   Returns X, except if X is 0 returns Y.  */

extern tree chainon (tree, tree);

/* Make a new TREE_LIST node from specified PURPOSE, VALUE and CHAIN.  */

extern tree tree_cons_stat (tree, tree, tree MEM_STAT_DECL);
#define tree_cons(t,q,w) tree_cons_stat (t,q,w MEM_STAT_INFO)

/* Return the last tree node in a chain.  */

extern tree tree_last (tree);

/* Reverse the order of elements in a chain, and return the new head.  */

extern tree nreverse (tree);

/* Returns the length of a chain of nodes
   (number of chain pointers to follow before reaching a null pointer).  */

extern int list_length (tree);

/* Returns the number of FIELD_DECLs in a type.  */

extern int fields_length (tree);

/* Given an initializer INIT, return TRUE if INIT is zero or some
   aggregate of zeros.  Otherwise return FALSE.  */

extern bool initializer_zerop (tree);

extern void categorize_ctor_elements (tree, HOST_WIDE_INT *, HOST_WIDE_INT *,
				      HOST_WIDE_INT *, bool *);
extern HOST_WIDE_INT count_type_elements (tree, bool);

/* integer_zerop (tree x) is nonzero if X is an integer constant of value 0.  */

extern int integer_zerop (tree);

/* integer_onep (tree x) is nonzero if X is an integer constant of value 1.  */

extern int integer_onep (tree);

/* integer_all_onesp (tree x) is nonzero if X is an integer constant
   all of whose significant bits are 1.  */

extern int integer_all_onesp (tree);

/* integer_pow2p (tree x) is nonzero is X is an integer constant with
   exactly one bit 1.  */

extern int integer_pow2p (tree);

/* integer_nonzerop (tree x) is nonzero if X is an integer constant
   with a nonzero value.  */

extern int integer_nonzerop (tree);

extern bool zero_p (tree);
extern bool cst_and_fits_in_hwi (tree);
extern tree num_ending_zeros (tree);

/* staticp (tree x) is nonzero if X is a reference to data allocated
   at a fixed address in memory.  Returns the outermost data.  */

extern tree staticp (tree);

/* save_expr (EXP) returns an expression equivalent to EXP
   but it can be used multiple times within context CTX
   and only evaluate EXP once.  */

extern tree save_expr (tree);

/* Look inside EXPR and into any simple arithmetic operations.  Return
   the innermost non-arithmetic node.  */

extern tree skip_simple_arithmetic (tree);

/* Return which tree structure is used by T.  */

enum tree_node_structure_enum tree_node_structure (tree);

/* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size
   or offset that depends on a field within a record.

   Note that we only allow such expressions within simple arithmetic
   or a COND_EXPR.  */

extern bool contains_placeholder_p (tree);

/* This macro calls the above function but short-circuits the common
   case of a constant to save time.  Also check for null.  */

#define CONTAINS_PLACEHOLDER_P(EXP) \
  ((EXP) != 0 && ! TREE_CONSTANT (EXP) && contains_placeholder_p (EXP))

/* Return 1 if any part of the computation of TYPE involves a PLACEHOLDER_EXPR.
   This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and field
   positions.  */

extern bool type_contains_placeholder_p (tree);

/* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
   return a tree with all occurrences of references to F in a
   PLACEHOLDER_EXPR replaced by R.   Note that we assume here that EXP
   contains only arithmetic expressions.  */

extern tree substitute_in_expr (tree, tree, tree);

/* This macro calls the above function but short-circuits the common
   case of a constant to save time and also checks for NULL.  */

#define SUBSTITUTE_IN_EXPR(EXP, F, R) \
  ((EXP) == 0 || TREE_CONSTANT (EXP) ? (EXP) : substitute_in_expr (EXP, F, R))

/* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
   for it within OBJ, a tree that is an object or a chain of references.  */

extern tree substitute_placeholder_in_expr (tree, tree);

/* This macro calls the above function but short-circuits the common
   case of a constant to save time and also checks for NULL.  */

#define SUBSTITUTE_PLACEHOLDER_IN_EXPR(EXP, OBJ) \
  ((EXP) == 0 || TREE_CONSTANT (EXP) ? (EXP)	\
   : substitute_placeholder_in_expr (EXP, OBJ))

/* variable_size (EXP) is like save_expr (EXP) except that it
   is for the special case of something that is part of a
   variable size for a data type.  It makes special arrangements
   to compute the value at the right time when the data type
   belongs to a function parameter.  */

extern tree variable_size (tree);

/* stabilize_reference (EXP) returns a reference equivalent to EXP
   but it can be used multiple times
   and only evaluate the subexpressions once.  */

extern tree stabilize_reference (tree);

/* Subroutine of stabilize_reference; this is called for subtrees of
   references.  Any expression with side-effects must be put in a SAVE_EXPR
   to ensure that it is only evaluated once.  */

extern tree stabilize_reference_1 (tree);

/* Return EXP, stripped of any conversions to wider types
   in such a way that the result of converting to type FOR_TYPE
   is the same as if EXP were converted to FOR_TYPE.
   If FOR_TYPE is 0, it signifies EXP's type.  */

extern tree get_unwidened (tree, tree);

/* Return OP or a simpler expression for a narrower value
   which can be sign-extended or zero-extended to give back OP.
   Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
   or 0 if the value should be sign-extended.  */

extern tree get_narrower (tree, int *);

/* Given an expression EXP that may be a COMPONENT_REF or an ARRAY_REF,
   look for nested component-refs or array-refs at constant positions
   and find the ultimate containing object, which is returned.  */

extern tree get_inner_reference (tree, HOST_WIDE_INT *, HOST_WIDE_INT *,
				 tree *, enum machine_mode *, int *, int *,
				 bool);

/* Return 1 if T is an expression that get_inner_reference handles.  */

extern int handled_component_p (tree);

/* Return a tree of sizetype representing the size, in bytes, of the element
   of EXP, an ARRAY_REF.  */

extern tree array_ref_element_size (tree);

/* Return a tree representing the lower bound of the array mentioned in
   EXP, an ARRAY_REF.  */

extern tree array_ref_low_bound (tree);

/* Return a tree representing the upper bound of the array mentioned in
   EXP, an ARRAY_REF.  */

extern tree array_ref_up_bound (tree);

/* Return a tree representing the offset, in bytes, of the field referenced
   by EXP.  This does not include any offset in DECL_FIELD_BIT_OFFSET.  */

extern tree component_ref_field_offset (tree);

/* Given a DECL or TYPE, return the scope in which it was declared, or
   NUL_TREE if there is no containing scope.  */

extern tree get_containing_scope (tree);

/* Return the FUNCTION_DECL which provides this _DECL with its context,
   or zero if none.  */
extern tree decl_function_context (tree);

/* Return the RECORD_TYPE, UNION_TYPE, or QUAL_UNION_TYPE which provides
   this _DECL with its context, or zero if none.  */
extern tree decl_type_context (tree);

/* Return 1 if EXPR is the real constant zero.  */
extern int real_zerop (tree);

/* Declare commonly used variables for tree structure.  */

/* Nonzero means lvalues are limited to those valid in pedantic ANSI C.
   Zero means allow extended lvalues.  */

extern int pedantic_lvalues;

/* Points to the FUNCTION_DECL of the function whose body we are reading.  */

extern GTY(()) tree current_function_decl;

/* Nonzero means a FUNC_BEGIN label was emitted.  */
extern GTY(()) const char * current_function_func_begin_label;

/* In tree.c */
extern unsigned crc32_string (unsigned, const char *);
extern void clean_symbol_name (char *);
extern tree get_file_function_name_long (const char *);
extern tree get_callee_fndecl (tree);
extern void change_decl_assembler_name (tree, tree);
extern int type_num_arguments (tree);
extern bool associative_tree_code (enum tree_code);
extern bool commutative_tree_code (enum tree_code);
extern tree upper_bound_in_type (tree, tree);
extern tree lower_bound_in_type (tree, tree);
extern int operand_equal_for_phi_arg_p (tree, tree);
extern bool empty_body_p (tree);

/* In stmt.c */

extern void expand_expr_stmt (tree);
extern int warn_if_unused_value (tree, location_t);
extern void expand_label (tree);
extern void expand_goto (tree);

extern rtx expand_stack_save (void);
extern void expand_stack_restore (tree);
extern void expand_return (tree);
extern int is_body_block (tree);

/* In tree-eh.c */
extern void using_eh_for_cleanups (void);

/* In fold-const.c */

/* Fold constants as much as possible in an expression.
   Returns the simplified expression.
   Acts only on the top level of the expression;
   if the argument itself cannot be simplified, its
   subexpressions are not changed.  */

extern tree fold (tree);
extern tree fold_unary (enum tree_code, tree, tree);
extern tree fold_binary (enum tree_code, tree, tree, tree);
extern tree fold_ternary (enum tree_code, tree, tree, tree, tree);
extern tree fold_build1_stat (enum tree_code, tree, tree MEM_STAT_DECL);
#define fold_build1(c,t1,t2) fold_build1_stat (c, t1, t2 MEM_STAT_INFO)
extern tree fold_build2_stat (enum tree_code, tree, tree, tree MEM_STAT_DECL);
#define fold_build2(c,t1,t2,t3) fold_build2_stat (c, t1, t2, t3 MEM_STAT_INFO)
extern tree fold_build3_stat (enum tree_code, tree, tree, tree, tree MEM_STAT_DECL);
#define fold_build3(c,t1,t2,t3,t4) fold_build3_stat (c, t1, t2, t3, t4 MEM_STAT_INFO)
extern tree fold_build1_initializer (enum tree_code, tree, tree);
extern tree fold_build2_initializer (enum tree_code, tree, tree, tree);
extern tree fold_build3_initializer (enum tree_code, tree, tree, tree, tree);
extern tree fold_convert (tree, tree);
extern tree fold_single_bit_test (enum tree_code, tree, tree, tree);
extern tree fold_ignored_result (tree);
extern tree fold_abs_const (tree, tree);
extern tree fold_indirect_ref_1 (tree, tree);

extern tree force_fit_type (tree, int, bool, bool);

extern int add_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
		       unsigned HOST_WIDE_INT, HOST_WIDE_INT,
		       unsigned HOST_WIDE_INT *, HOST_WIDE_INT *);
extern int neg_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
		       unsigned HOST_WIDE_INT *, HOST_WIDE_INT *);
extern int mul_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
		       unsigned HOST_WIDE_INT, HOST_WIDE_INT,
		       unsigned HOST_WIDE_INT *, HOST_WIDE_INT *);
extern void lshift_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
			   HOST_WIDE_INT, unsigned int,
			   unsigned HOST_WIDE_INT *, HOST_WIDE_INT *, int);
extern void rshift_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
			   HOST_WIDE_INT, unsigned int,
			   unsigned HOST_WIDE_INT *, HOST_WIDE_INT *, int);
extern void lrotate_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
			    HOST_WIDE_INT, unsigned int,
			    unsigned HOST_WIDE_INT *, HOST_WIDE_INT *);
extern void rrotate_double (unsigned HOST_WIDE_INT, HOST_WIDE_INT,
			    HOST_WIDE_INT, unsigned int,
			    unsigned HOST_WIDE_INT *, HOST_WIDE_INT *);

extern int div_and_round_double (enum tree_code, int, unsigned HOST_WIDE_INT,
				 HOST_WIDE_INT, unsigned HOST_WIDE_INT,
				 HOST_WIDE_INT, unsigned HOST_WIDE_INT *,
				 HOST_WIDE_INT *, unsigned HOST_WIDE_INT *,
				 HOST_WIDE_INT *);

enum operand_equal_flag
{
  OEP_ONLY_CONST = 1,
  OEP_PURE_SAME = 2
};

extern int operand_equal_p (tree, tree, unsigned int);

extern tree omit_one_operand (tree, tree, tree);
extern tree omit_two_operands (tree, tree, tree, tree);
extern tree invert_truthvalue (tree);
extern tree fold_unary_to_constant (enum tree_code, tree, tree);
extern tree fold_binary_to_constant (enum tree_code, tree, tree, tree);
extern tree fold_read_from_constant_string (tree);
extern tree int_const_binop (enum tree_code, tree, tree, int);
extern tree build_fold_addr_expr (tree);
extern tree fold_build_cleanup_point_expr (tree type, tree expr);
extern tree fold_strip_sign_ops (tree);
extern tree build_fold_addr_expr_with_type (tree, tree);
extern tree build_fold_indirect_ref (tree);
extern tree fold_indirect_ref (tree);
extern tree constant_boolean_node (int, tree);
extern tree build_low_bits_mask (tree, unsigned);

extern bool tree_swap_operands_p (tree, tree, bool);
extern void swap_tree_operands (tree, tree *, tree *);
extern enum tree_code swap_tree_comparison (enum tree_code);

extern bool ptr_difference_const (tree, tree, HOST_WIDE_INT *);
extern enum tree_code invert_tree_comparison (enum tree_code, bool);

extern bool tree_expr_nonzero_p (tree);

/* In builtins.c */
extern tree fold_builtin (tree, tree, bool);
extern tree fold_builtin_fputs (tree, bool, bool, tree);
extern tree fold_builtin_strcpy (tree, tree, tree);
extern tree fold_builtin_strncpy (tree, tree, tree);
extern tree fold_builtin_memory_chk (tree, tree, tree, bool,
				     enum built_in_function);
extern tree fold_builtin_stxcpy_chk (tree, tree, tree, bool,
				     enum built_in_function);
extern tree fold_builtin_strncpy_chk (tree, tree);
extern tree fold_builtin_snprintf_chk (tree, tree, enum built_in_function);
extern bool fold_builtin_next_arg (tree);
extern enum built_in_function builtin_mathfn_code (tree);
extern tree build_function_call_expr (tree, tree);
extern tree mathfn_built_in (tree, enum built_in_function fn);
extern tree strip_float_extensions (tree);
extern tree c_strlen (tree, int);
extern tree std_gimplify_va_arg_expr (tree, tree, tree *, tree *);
extern tree build_va_arg_indirect_ref (tree);
tree build_string_literal (int, const char *);

/* In convert.c */
extern tree strip_float_extensions (tree);

/* In alias.c */
extern void record_component_aliases (tree);
extern HOST_WIDE_INT get_alias_set (tree);
extern int alias_sets_conflict_p (HOST_WIDE_INT, HOST_WIDE_INT);
extern int alias_sets_might_conflict_p (HOST_WIDE_INT, HOST_WIDE_INT);
extern int objects_must_conflict_p (tree, tree);

/* In tree.c */
extern int really_constant_p (tree);
extern int int_fits_type_p (tree, tree);
extern bool variably_modified_type_p (tree, tree);
extern int tree_log2 (tree);
extern int tree_floor_log2 (tree);
extern int simple_cst_equal (tree, tree);
extern hashval_t iterative_hash_expr (tree, hashval_t);
extern int compare_tree_int (tree, unsigned HOST_WIDE_INT);
extern int type_list_equal (tree, tree);
extern int chain_member (tree, tree);
extern tree type_hash_lookup (unsigned int, tree);
extern void type_hash_add (unsigned int, tree);
extern int simple_cst_list_equal (tree, tree);
extern void dump_tree_statistics (void);
extern void expand_function_end (void);
extern void expand_function_start (tree);
extern void stack_protect_prologue (void);
extern void stack_protect_epilogue (void);
extern void recompute_tree_invariant_for_addr_expr (tree);
extern bool is_global_var (tree t);
extern bool needs_to_live_in_memory (tree);
extern tree reconstruct_complex_type (tree, tree);

extern int real_onep (tree);
extern int real_twop (tree);
extern int real_minus_onep (tree);
extern void init_ttree (void);
extern void build_common_tree_nodes (bool, bool);
extern void build_common_tree_nodes_2 (int);
extern void build_common_builtin_nodes (void);
extern tree build_nonstandard_integer_type (unsigned HOST_WIDE_INT, int);
extern tree build_range_type (tree, tree, tree);
extern HOST_WIDE_INT int_cst_value (tree);
extern tree tree_fold_gcd (tree, tree);
extern tree build_addr (tree, tree);

extern bool fields_compatible_p (tree, tree);
extern tree find_compatible_field (tree, tree);

/* In function.c */
extern void expand_main_function (void);
extern void init_dummy_function_start (void);
extern void expand_dummy_function_end (void);
extern unsigned int init_function_for_compilation (void);
extern void allocate_struct_function (tree);
extern void init_function_start (tree);
extern bool use_register_for_decl (tree);
extern void setjmp_vars_warning (tree);
extern void setjmp_args_warning (void);
extern void init_temp_slots (void);
extern void free_temp_slots (void);
extern void pop_temp_slots (void);
extern void push_temp_slots (void);
extern void preserve_temp_slots (rtx);
extern int aggregate_value_p (tree, tree);
extern void push_function_context (void);
extern void pop_function_context (void);
extern void push_function_context_to (tree);
extern void pop_function_context_from (tree);
extern tree gimplify_parameters (void);

/* In print-rtl.c */
#ifdef BUFSIZ
extern void print_rtl (FILE *, rtx);
#endif

/* In print-tree.c */
extern void debug_tree (tree);
#ifdef BUFSIZ
extern void print_node (FILE *, const char *, tree, int);
extern void print_node_brief (FILE *, const char *, tree, int);
extern void indent_to (FILE *, int);
#endif

/* In tree-inline.c:  */
extern bool debug_find_tree (tree, tree);
/* This is in tree-inline.c since the routine uses
   data structures from the inliner.  */
extern tree unsave_expr_now (tree);
extern tree build_duplicate_type (tree);

/* In emit-rtl.c */
extern rtx emit_line_note (location_t);

/* In calls.c */

/* Nonzero if this is a call to a function whose return value depends
   solely on its arguments, has no side effects, and does not read
   global memory.  */
#define ECF_CONST		1
/* Nonzero if this call will never return.  */
#define ECF_NORETURN		2
/* Nonzero if this is a call to malloc or a related function.  */
#define ECF_MALLOC		4
/* Nonzero if it is plausible that this is a call to alloca.  */
#define ECF_MAY_BE_ALLOCA	8
/* Nonzero if this is a call to a function that won't throw an exception.  */
#define ECF_NOTHROW		16
/* Nonzero if this is a call to setjmp or a related function.  */
#define ECF_RETURNS_TWICE	32
/* Nonzero if this call replaces the current stack frame.  */
#define ECF_SIBCALL		64
/* Nonzero if this is a call to "pure" function (like const function,
   but may read memory.  */
#define ECF_PURE		128
/* Nonzero if this is a call to a function that returns with the stack
   pointer depressed.  */
#define ECF_SP_DEPRESSED	256
/* Create libcall block around the call.  */
#define ECF_LIBCALL_BLOCK	512
/* Function does not read or write memory (but may have side effects, so
   it does not necessarily fit ECF_CONST).  */
#define ECF_NOVOPS		1024

extern int flags_from_decl_or_type (tree);
extern int call_expr_flags (tree);

extern int setjmp_call_p (tree);
extern bool alloca_call_p (tree);
extern bool must_pass_in_stack_var_size (enum machine_mode, tree);
extern bool must_pass_in_stack_var_size_or_pad (enum machine_mode, tree);

/* In attribs.c.  */

/* Process the attributes listed in ATTRIBUTES and install them in *NODE,
   which is either a DECL (including a TYPE_DECL) or a TYPE.  If a DECL,
   it should be modified in place; if a TYPE, a copy should be created
   unless ATTR_FLAG_TYPE_IN_PLACE is set in FLAGS.  FLAGS gives further
   information, in the form of a bitwise OR of flags in enum attribute_flags
   from tree.h.  Depending on these flags, some attributes may be
   returned to be applied at a later stage (for example, to apply
   a decl attribute to the declaration rather than to its type).  */
extern tree decl_attributes (tree *, tree, int);

/* In integrate.c */
extern void set_decl_abstract_flags (tree, int);
extern void set_decl_origin_self (tree);

/* In stor-layout.c */
extern void set_min_and_max_values_for_integral_type (tree, int, bool);
extern void fixup_signed_type (tree);
extern void internal_reference_types (void);
extern unsigned int update_alignment_for_field (record_layout_info, tree,
                                                unsigned int);
/* varasm.c */
extern void make_decl_rtl (tree);
extern void make_decl_one_only (tree);
extern int supports_one_only (void);
extern void resolve_unique_section (tree, int, int);
extern void mark_referenced (tree);
extern void mark_decl_referenced (tree);
extern void notice_global_symbol (tree);
extern void set_user_assembler_name (tree, const char *);
extern void process_pending_assemble_externals (void);
extern void finish_aliases_1 (void);
extern void finish_aliases_2 (void);

/* In stmt.c */
extern void expand_computed_goto (tree);
extern bool parse_output_constraint (const char **, int, int, int,
				     bool *, bool *, bool *);
extern bool parse_input_constraint (const char **, int, int, int, int,
				    const char * const *, bool *, bool *);
extern void expand_asm_expr (tree);
extern tree resolve_asm_operand_names (tree, tree, tree);
extern void expand_case (tree);
extern void expand_decl (tree);
extern void expand_anon_union_decl (tree, tree, tree);
#ifdef HARD_CONST
/* Silly ifdef to avoid having all includers depend on hard-reg-set.h.  */
extern tree tree_overlaps_hard_reg_set (tree, HARD_REG_SET *);
#endif

/* In gimplify.c.  */
extern tree create_artificial_label (void);
extern void gimplify_function_tree (tree);
extern const char *get_name (tree);
extern tree unshare_expr (tree);
extern void sort_case_labels (tree);

/* If KIND=='I', return a suitable global initializer (constructor) name.
   If KIND=='D', return a suitable global clean-up (destructor) name.  */
extern tree get_file_function_name (int);

/* Interface of the DWARF2 unwind info support.  */

/* Generate a new label for the CFI info to refer to.  */

extern char *dwarf2out_cfi_label (void);

/* Entry point to update the canonical frame address (CFA).  */

extern void dwarf2out_def_cfa (const char *, unsigned, HOST_WIDE_INT);

/* Add the CFI for saving a register window.  */

extern void dwarf2out_window_save (const char *);

/* Add a CFI to update the running total of the size of arguments pushed
   onto the stack.  */

extern void dwarf2out_args_size (const char *, HOST_WIDE_INT);

/* Entry point for saving a register to the stack.  */

extern void dwarf2out_reg_save (const char *, unsigned, HOST_WIDE_INT);

/* Entry point for saving the return address in the stack.  */

extern void dwarf2out_return_save (const char *, HOST_WIDE_INT);

/* Entry point for saving the return address in a register.  */

extern void dwarf2out_return_reg (const char *, unsigned);

/* Entry point for saving the first register into the second.  */

extern void dwarf2out_reg_save_reg (const char *, rtx, rtx);

/* In tree-inline.c  */

/* The type of a set of already-visited pointers.  Functions for creating
   and manipulating it are declared in pointer-set.h */
struct pointer_set_t;

/* The type of a callback function for walking over tree structure.  */

typedef tree (*walk_tree_fn) (tree *, int *, void *);
extern tree walk_tree (tree*, walk_tree_fn, void*, struct pointer_set_t*);
extern tree walk_tree_without_duplicates (tree*, walk_tree_fn, void*);

/* Assign the RTX to declaration.  */

extern void set_decl_rtl (tree, rtx);
extern void set_decl_incoming_rtl (tree, rtx);

/* Enum and arrays used for tree allocation stats.
   Keep in sync with tree.c:tree_node_kind_names.  */
typedef enum
{
  d_kind,
  t_kind,
  b_kind,
  s_kind,
  r_kind,
  e_kind,
  c_kind,
  id_kind,
  perm_list_kind,
  temp_list_kind,
  vec_kind,
  binfo_kind,
  phi_kind,
  ssa_name_kind,
  constr_kind,
  x_kind,
  lang_decl,
  lang_type,
  omp_clause_kind,
  all_kinds
} tree_node_kind;

extern int tree_node_counts[];
extern int tree_node_sizes[];

/* True if we are in gimple form and the actions of the folders need to
   be restricted.  False if we are not in gimple form and folding is not
   restricted to creating gimple expressions.  */
extern bool in_gimple_form;

/* In tree-gimple.c.  */
extern tree get_base_address (tree t);

/* In tree-vectorizer.c.  */
extern void vect_set_verbosity_level (const char *);

struct tree_map GTY(())
{
  unsigned int hash;
  tree from;
  tree to;
};

extern unsigned int tree_map_hash (const void *);
extern int tree_map_marked_p (const void *);
extern int tree_map_eq (const void *, const void *);

/* In tree-ssa-address.c.  */
extern tree tree_mem_ref_addr (tree, tree);
extern void copy_mem_ref_info (tree, tree);

/* In tree-vrp.c */
extern bool ssa_name_nonzero_p (tree);
extern bool ssa_name_nonnegative_p (tree);

/* In tree-object-size.c.  */
extern void init_object_sizes (void);
extern void fini_object_sizes (void);
extern unsigned HOST_WIDE_INT compute_builtin_object_size (tree, int);

/* In expr.c.  */
extern unsigned HOST_WIDE_INT highest_pow2_factor (tree);

#endif  /* GCC_TREE_H  */