aboutsummaryrefslogtreecommitdiff
path: root/gcc/java/decl.c
blob: b7aa61650d3548a5d06c847ce0f0aed302f9992d (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
/* Process declarations and variables for the GNU compiler for the
   Java(TM) language.
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
   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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

Java and all Java-based marks are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries.
The Free Software Foundation is independent of Sun Microsystems, Inc.  */

/* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "real.h"
#include "toplev.h"
#include "flags.h"
#include "java-tree.h"
#include "jcf.h"
#include "function.h"
#include "expr.h"
#include "libfuncs.h"
#include "except.h"
#include "java-except.h"
#include "ggc.h"
#include "timevar.h"
#include "cgraph.h"
#include "tree-inline.h"
#include "target.h"
#include "version.h"

#if defined (DEBUG_JAVA_BINDING_LEVELS)
extern void indent (void);
#endif

static tree push_jvm_slot (int, tree);
static tree lookup_name_current_level (tree);
static tree push_promoted_type (const char *, tree);
static struct binding_level *make_binding_level (void);
static tree create_primitive_vtable (const char *);
static tree check_local_unnamed_variable (tree, tree, tree);
static void parse_version (void);

/* Used when computing the ABI version.  */
#define GCJ_BINARYCOMPAT_ADDITION 5

/* The ABI version number.  */
tree gcj_abi_version;

/* Name of the Cloneable class.  */
tree java_lang_cloneable_identifier_node;

/* Name of the Serializable class.  */
tree java_io_serializable_identifier_node;

/* The DECL_MAP is a mapping from (index, type) to a decl node.
   If index < max_locals, it is the index of a local variable.
   if index >= max_locals, then index-max_locals is a stack slot.
   The DECL_MAP mapping is represented as a TREE_VEC whose elements
   are a list of decls (VAR_DECL or PARM_DECL) chained by
   DECL_LOCAL_SLOT_CHAIN; the index finds the TREE_VEC element, and then
   we search the chain for a decl with a matching TREE_TYPE. */

static GTY(()) tree decl_map;

/* The base_decl_map is contains one variable of ptr_type: this is
   used to contain every variable of reference type that is ever
   stored in a local variable slot.  */

static GTY(()) tree base_decl_map;

/* An index used to make temporary identifiers unique.  */
static int uniq;

/* A list of local variables VAR_DECLs for this method that we have seen
   debug information, but we have not reached their starting (byte) PC yet. */

static GTY(()) tree pending_local_decls;

#if defined(DEBUG_JAVA_BINDING_LEVELS)
int binding_depth = 0;
int is_class_level = 0;
int current_pc;

void
indent (void)
{
  int i;

  for (i = 0; i < binding_depth*2; i++)
    putc (' ', stderr);
}
#endif /* defined(DEBUG_JAVA_BINDING_LEVELS) */

/* True if decl is a named local variable, i.e. if it is an alias
   that's used only for debugging purposes.  */

static bool
debug_variable_p (tree decl)
{
  if (TREE_CODE (decl) == PARM_DECL)
    return false;

  if (LOCAL_SLOT_P (decl))
    return false;

  return true;
}
 
/* Copy the value in decl into every live alias in the same local
   variable slot.  Some of these will be dead stores removed by the
   optimizer.  */

void 
update_aliases (tree decl, int index, int pc)
{
  tree decl_type = TREE_TYPE (decl);
  tree tmp;

  if (debug_variable_p (decl))
    abort ();

  for (tmp = TREE_VEC_ELT (decl_map, index); 
       tmp != NULL_TREE; 
       tmp = DECL_LOCAL_SLOT_CHAIN (tmp))
    {
      tree tmp_type = TREE_TYPE (tmp);
      if (tmp != decl
	  && LOCAL_SLOT_P (tmp) == 0
	  && (pc == -1
	      || (pc >= DECL_LOCAL_START_PC (tmp)
		  && pc <= DECL_LOCAL_END_PC (tmp)))
	  && (tmp_type == decl_type
	      || (INTEGRAL_TYPE_P (tmp_type)
		  && INTEGRAL_TYPE_P (decl_type)
		  && TYPE_PRECISION (decl_type) <= 32
		  && TYPE_PRECISION (tmp_type) <= 32)
	      || (TREE_CODE (tmp_type) == POINTER_TYPE
		  && TREE_CODE (decl_type) == POINTER_TYPE)))
	{
	  tree src = build1 (NOP_EXPR, tmp_type, decl);
	  if (LOCAL_VAR_OUT_OF_SCOPE_P (tmp))
	    abort ();
	  java_add_stmt (build2 (MODIFY_EXPR, tmp_type, tmp, src));
	}
    }
}

static tree
push_jvm_slot (int index, tree decl)
{
  DECL_CONTEXT (decl) = current_function_decl;
  layout_decl (decl, 0);

  /* Now link the decl into the decl_map. */
  if (DECL_LANG_SPECIFIC (decl) == NULL)
    {
      MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (decl);
      DECL_LOCAL_START_PC (decl) = 0;
      DECL_LOCAL_END_PC (decl) = DECL_CODE_LENGTH (current_function_decl);
      DECL_LOCAL_SLOT_NUMBER (decl) = index;
    }
  DECL_LOCAL_SLOT_CHAIN (decl) = TREE_VEC_ELT (decl_map, index);
  TREE_VEC_ELT (decl_map, index) = decl;

  return decl;
}

/*  At the point of its creation a local variable decl inherits
    whatever is already in the same slot.  In the case of a local
    variable that is declared but unused, we won't find anything.  */

static void
initialize_local_variable (tree decl, int index)
{
  tree decl_type = TREE_TYPE (decl);
  if (TREE_CODE (decl_type) == POINTER_TYPE)
    {
      tree tmp = TREE_VEC_ELT (base_decl_map, index);

      if (tmp)
        {
	  /* At the point of its creation this decl inherits whatever
	     is in the slot.  */
	  tree src = build1 (NOP_EXPR, decl_type, tmp);
	  java_add_stmt (build2 (MODIFY_EXPR, decl_type, decl, src));	
	}
    }
  else
    {
      tree tmp;
  
      for (tmp = TREE_VEC_ELT (decl_map, index); 
	   tmp != NULL_TREE; 
	   tmp = DECL_LOCAL_SLOT_CHAIN (tmp))
	{
	  tree tmp_type = TREE_TYPE (tmp);
	  if (tmp != decl
	      && ! debug_variable_p (tmp)
	      && (tmp_type == decl_type
		  || (INTEGRAL_TYPE_P (tmp_type)
		      && INTEGRAL_TYPE_P (decl_type)
		      && TYPE_PRECISION (decl_type) <= 32
		      && TYPE_PRECISION (tmp_type) <= 32
		      && TYPE_PRECISION (tmp_type)
			 >= TYPE_PRECISION (decl_type))))
	    {
	      java_add_stmt (build2 (MODIFY_EXPR, decl_type, decl, tmp));	
	      return;
	    }
	}  
    }
}

/* Find the best declaration based upon type.  If 'decl' fits 'type' better
   than 'best', return 'decl'.  Otherwise return 'best'.  */

static tree
check_local_unnamed_variable (tree best, tree decl, tree type)
{
  tree decl_type = TREE_TYPE (decl);
  
  if (LOCAL_VAR_OUT_OF_SCOPE_P (decl))
    abort ();

  /* Use the same decl for all integer types <= 32 bits.  This is
     necessary because sometimes a value is stored as (for example)
     boolean but loaded as int.  */
  if (decl_type == type
      || (INTEGRAL_TYPE_P (decl_type)
	  && INTEGRAL_TYPE_P (type)
	  && TYPE_PRECISION (decl_type) <= 32
	  && TYPE_PRECISION (type) <= 32
	  && TYPE_PRECISION (decl_type) >= TYPE_PRECISION (type))      
      /*  ptr_type_node is used for null pointers, which are
	  assignment compatible with everything.  */
      || (TREE_CODE (decl_type) == POINTER_TYPE
	  && type == ptr_type_node)
      /* Whenever anyone wants to use a slot that is initially
	 occupied by a PARM_DECL of pointer type they must get that
	 decl, even if they asked for a pointer to a different type.
	 However, if someone wants a scalar variable in a slot that
	 initially held a pointer arg -- or vice versa -- we create a
	 new VAR_DECL.  

      	 ???: As long as verification is correct, this will be a
	 compatible type.  But maybe we should create a dummy variable
	 and replace all references to it with the DECL and a
	 NOP_EXPR.  
      */
      || (TREE_CODE (decl_type) == POINTER_TYPE
	  && TREE_CODE (decl) == PARM_DECL
	  && TREE_CODE (type) == POINTER_TYPE))
    {
      if (best == NULL_TREE
	  || (decl_type == type && TREE_TYPE (best) != type))
	return decl;
    }

  return best;
}


/* Find a VAR_DECL (or PARM_DECL) at local index INDEX that has type TYPE,
   that is valid at PC (or -1 if any pc).
   If there is no existing matching decl, allocate one.  */

tree
find_local_variable (int index, tree type, int pc ATTRIBUTE_UNUSED)
{
  tree tmp = TREE_VEC_ELT (decl_map, index);
  tree decl = NULL_TREE;

  /* Scan through every declaration that has been created in this
     slot.  We're only looking for variables that correspond to local
     index declarations and PARM_DECLs, not named variables: such
     local variables are used only for debugging information.  */
  while (tmp != NULL_TREE)
    {
      if (! debug_variable_p (tmp))
	decl = check_local_unnamed_variable (decl, tmp, type);
      tmp = DECL_LOCAL_SLOT_CHAIN (tmp);
    }

  /* gcj has a function called promote_type(), which is used by both
     the bytecode compiler and the source compiler.  Unfortunately,
     the type systems for the Java VM and the Java language are not
     the same: a boolean in the VM promotes to an int, not to a wide
     boolean.  If our caller wants something to hold a boolean, that
     had better be an int, because that slot might be re-used
     later in integer context.  */
  if (TREE_CODE (type) == BOOLEAN_TYPE)
    type = integer_type_node;

  /* If we don't find a match, create one with the type passed in.
     The name of the variable is #n#m, which n is the variable index
     in the local variable area and m is a dummy identifier for
     uniqueness -- multiple variables may share the same local
     variable index.  We don't call pushdecl() to push pointer types
     into a binding expr because they'll all be replaced by a single
     variable that is used for every reference in that local variable
     slot.  */
  if (! decl)
    {
      char buf[64];
      tree name;
      sprintf (buf, "#slot#%d#%d", index, uniq++);
      name = get_identifier (buf);
      decl = build_decl (VAR_DECL, name, type);
      DECL_IGNORED_P (decl) = 1;
      DECL_ARTIFICIAL (decl) = 1;
      decl = push_jvm_slot (index, decl);
      LOCAL_SLOT_P (decl) = 1;

      if (TREE_CODE (type) != POINTER_TYPE)
	pushdecl_function_level (decl);
    }

  /* As well as creating a local variable that matches the type, we
     also create a base variable (of ptr_type) that will hold all its
     aliases.  */
  if (TREE_CODE (type) == POINTER_TYPE
      && ! TREE_VEC_ELT (base_decl_map, index))
    {
      char buf[64];
      tree name;
      tree base_decl;
      sprintf (buf, "#ref#%d#%d", index, uniq++);
      name = get_identifier (buf);
      base_decl
	= TREE_VEC_ELT (base_decl_map, index)
	= build_decl (VAR_DECL, name, ptr_type_node);
      pushdecl_function_level (base_decl);
      DECL_IGNORED_P (base_decl) = 1;
      DECL_ARTIFICIAL (base_decl) = 1;
    }

  return decl;
}

/* Called during gimplification for every variable.  If the variable
   is a temporary of pointer type, replace it with a common variable
   thath is used to hold all pointer types that are ever stored in
   that slot.  Set WANT_LVALUE if you want a variable that is to be
   written to.  */

tree 
java_replace_reference (tree var_decl, bool want_lvalue)
{
  tree decl_type;

  if (! base_decl_map)
    return var_decl;

  decl_type = TREE_TYPE (var_decl);

  if (TREE_CODE (decl_type) == POINTER_TYPE)
    {
      if (DECL_LANG_SPECIFIC (var_decl)
	  && LOCAL_SLOT_P (var_decl))
	{
	  int index = DECL_LOCAL_SLOT_NUMBER (var_decl);
	  tree base_decl = TREE_VEC_ELT (base_decl_map, index); 

	  if (! base_decl)
	    abort ();

	  if (! want_lvalue)
	    base_decl = build1 (NOP_EXPR, decl_type, base_decl);

	  return base_decl;
	}
    }

  return var_decl;
}


/* Same as find_local_index, except that INDEX is a stack index. */

tree
find_stack_slot (int index, tree type)
{
  return find_local_variable (index + DECL_MAX_LOCALS (current_function_decl),
			      type, -1);
}

struct binding_level GTY(())
  {
    /* A chain of _DECL nodes for all variables, constants, functions,
     * and typedef types.  These are in the reverse of the order supplied.
     */
    tree names;

    /* For each level, a list of shadowed outer-level local definitions
       to be restored when this level is popped.
       Each link is a TREE_LIST whose TREE_PURPOSE is an identifier and
       whose TREE_VALUE is its old definition (a kind of ..._DECL node).  */
    tree shadowed;

    /* For each level (except not the global one),
       a chain of BLOCK nodes for all the levels
       that were entered and exited one level down.  */
    tree blocks;

    /* The binding level which this one is contained in (inherits from).  */
    struct binding_level *level_chain;

    /* The bytecode PC that marks the end of this level. */
    int end_pc;
    /* The bytecode PC that marks the start of this level. */
    int start_pc;

    /* The statements in this binding level.  */
    tree stmts;

    /* An exception range associated with this binding level.  */
    struct eh_range * GTY((skip (""))) exception_range;

    /* Binding depth at which this level began.  Used only for debugging.  */
    unsigned binding_depth;
  };

#define NULL_BINDING_LEVEL (struct binding_level *) NULL

/* The binding level currently in effect.  */

static GTY(()) struct binding_level *current_binding_level;

/* A chain of binding_level structures awaiting reuse.  */

static GTY(()) struct binding_level *free_binding_level;

/* The outermost binding level, for names of file scope.
   This is created when the compiler is started and exists
   through the entire run.  */

static GTY(()) struct binding_level *global_binding_level;

/* The binding level that holds variables declared at the outermost
   level within a function body.  */

static struct binding_level *function_binding_level;

/* A PC value bigger than any PC value we may ever may encounter. */

#define LARGEST_PC (( (unsigned int)1 << (HOST_BITS_PER_INT - 1)) - 1)

/* Binding level structures are initialized by copying this one.  */

static const struct binding_level clear_binding_level
= {
    NULL_TREE, /* names */
    NULL_TREE, /* shadowed */
    NULL_TREE, /* blocks */
    NULL_BINDING_LEVEL, /* level_chain */
    LARGEST_PC, /* end_pc */
    0, /* start_pc */
    NULL, /* stmts */
    NULL, /* exception_range */
    0, /* binding_depth */
  };

#if 0
/* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
   that have names.  Here so we can clear out their names' definitions
   at the end of the function.  */

static tree named_labels;

/* A list of LABEL_DECLs from outer contexts that are currently shadowed.  */

static tree shadowed_labels;
#endif

tree java_global_trees[JTI_MAX];
  
/* Build (and pushdecl) a "promoted type" for all standard
   types shorter than int.  */

static tree
push_promoted_type (const char *name, tree actual_type)
{
  tree type = make_node (TREE_CODE (actual_type));
#if 1
  tree in_min = TYPE_MIN_VALUE (int_type_node);
  tree in_max = TYPE_MAX_VALUE (int_type_node);
#else
  tree in_min = TYPE_MIN_VALUE (actual_type);
  tree in_max = TYPE_MAX_VALUE (actual_type);
#endif
  TYPE_MIN_VALUE (type) = copy_node (in_min);
  TREE_TYPE (TYPE_MIN_VALUE (type)) = type;
  TYPE_MAX_VALUE (type) = copy_node (in_max);
  TREE_TYPE (TYPE_MAX_VALUE (type)) = type;
  TYPE_PRECISION (type) = TYPE_PRECISION (int_type_node);
  layout_type (type);
  pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
  return type;
}

/* Return a definition for a builtin function named NAME and whose data type
   is TYPE.  TYPE should be a function type with argument types.
   FUNCTION_CODE tells later passes how to compile calls to this function.
   See tree.h for its possible values.

   If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
   the name to be called if we can't opencode the function.  If
   ATTRS is nonzero, use that for the function's attribute list.  */

tree
builtin_function (const char *name,
		  tree type,
		  int function_code,
		  enum built_in_class cl,
		  const char *library_name,
		  tree ARG_UNUSED (attrs))
{
  tree decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
  DECL_EXTERNAL (decl) = 1;
  TREE_PUBLIC (decl) = 1;
  if (library_name)
    SET_DECL_ASSEMBLER_NAME (decl, get_identifier (library_name));
  make_decl_rtl (decl);
  pushdecl (decl);
  DECL_BUILT_IN_CLASS (decl) = cl;
  DECL_FUNCTION_CODE (decl) = function_code;
  return decl;
}

/* Return tree that represents a vtable for a primitive array.  */
static tree
create_primitive_vtable (const char *name)
{
  tree r;
  char buf[50];

  sprintf (buf, "_Jv_%sVTable", name);
  r = build_decl (VAR_DECL, get_identifier (buf), ptr_type_node);
  DECL_EXTERNAL (r) = 1;
  return r;
}

static tree
do_nothing (tree t)
{
  return t;
}

/* Parse the version string and compute the ABI version number.  */
static void
parse_version (void)
{
  const char *p = version_string;
  unsigned int major = 0, minor = 0;
  unsigned int abi_version;

  /* Skip leading junk.  */
  while (*p && !ISDIGIT (*p))
    ++p;
  gcc_assert (*p);

  /* Extract major version.  */
  while (ISDIGIT (*p))
    {
      major = major * 10 + *p - '0';
      ++p;
    }

  gcc_assert (*p == '.' && ISDIGIT (p[1]));
  ++p;

  /* Extract minor version.  */
  while (ISDIGIT (*p))
    {
      minor = minor * 10 + *p - '0';
      ++p;
    }

  /* Implicit in this computation is the idea that we won't break the
     old-style binary ABI in a sub-minor release (e.g., from 4.0.0 to
     4.0.1).  */
  abi_version = 10000 * major + 10 * minor;
  /* It is helpful to distinguish BC ABI from ordinary ABI at this
     level, since at some point we will recognize a variety of BC ABIs
     (objects generated by different version of gcj), but will
     probably always require strict matching for ordinary ABI.  */
  if (flag_indirect_dispatch)
    abi_version += GCJ_BINARYCOMPAT_ADDITION;

  gcj_abi_version = build_int_cstu (ptr_type_node, abi_version);
}

void
java_init_decl_processing (void)
{
  tree endlink;
  tree field = NULL_TREE;
  tree t;

  init_class_processing ();

  current_function_decl = NULL;
  current_binding_level = NULL_BINDING_LEVEL;
  free_binding_level = NULL_BINDING_LEVEL;
  pushlevel (0);	/* make the binding_level structure for global names */
  global_binding_level = current_binding_level;

  /* The code here must be similar to build_common_tree_nodes{,_2} in
     tree.c, especially as to the order of initializing common nodes.  */
  error_mark_node = make_node (ERROR_MARK);
  TREE_TYPE (error_mark_node) = error_mark_node;

  /* Create sizetype first - needed for other types. */
  initialize_sizetypes (false);

  byte_type_node = make_signed_type (8);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("byte"), byte_type_node));
  short_type_node = make_signed_type (16);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("short"), short_type_node));
  int_type_node = make_signed_type (32);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("int"), int_type_node));
  long_type_node = make_signed_type (64);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("long"), long_type_node));

  unsigned_byte_type_node = make_unsigned_type (8);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("unsigned byte"),
			unsigned_byte_type_node));
  unsigned_short_type_node = make_unsigned_type (16);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("unsigned short"),
			unsigned_short_type_node));
  unsigned_int_type_node = make_unsigned_type (32);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("unsigned int"),
			unsigned_int_type_node));
  unsigned_long_type_node = make_unsigned_type (64);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("unsigned long"),
			unsigned_long_type_node));

  /* This is not a java type, however tree-dfa requires a definition for
     size_type_node.  */
  size_type_node = make_unsigned_type (POINTER_SIZE);
  set_sizetype (size_type_node);

  /* Define these next since types below may used them.  */
  integer_type_node = java_type_for_size (INT_TYPE_SIZE, 0);
  integer_zero_node = build_int_cst (NULL_TREE, 0);
  integer_one_node = build_int_cst (NULL_TREE, 1);
  integer_two_node = build_int_cst (NULL_TREE, 2);
  integer_four_node = build_int_cst (NULL_TREE, 4);
  integer_minus_one_node = build_int_cst (NULL_TREE, -1);

  /* A few values used for range checking in the lexer.  */
  decimal_int_max = build_int_cstu (unsigned_int_type_node, 0x80000000);
#if HOST_BITS_PER_WIDE_INT == 64
  decimal_long_max = build_int_cstu (unsigned_long_type_node,
				     0x8000000000000000LL);
#elif HOST_BITS_PER_WIDE_INT == 32
  decimal_long_max = build_int_cst_wide (unsigned_long_type_node,
					 0, 0x80000000);
#else
 #error "unsupported size"
#endif

  size_zero_node = size_int (0);
  size_one_node = size_int (1);
  bitsize_zero_node = bitsize_int (0);
  bitsize_one_node = bitsize_int (1);
  bitsize_unit_node = bitsize_int (BITS_PER_UNIT);

  long_zero_node = build_int_cst (long_type_node, 0);

  void_type_node = make_node (VOID_TYPE);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("void"), void_type_node));
  layout_type (void_type_node);	/* Uses size_zero_node */

  ptr_type_node = build_pointer_type (void_type_node);
  const_ptr_type_node
    = build_pointer_type (build_type_variant (void_type_node, 1, 0));

  t = make_node (VOID_TYPE);
  layout_type (t); /* Uses size_zero_node */
  return_address_type_node = build_pointer_type (t);

  null_pointer_node = build_int_cst (ptr_type_node, 0);

#if 0
  /* Make a type to be the domain of a few array types
     whose domains don't really matter.
     200 is small enough that it always fits in size_t
     and large enough that it can hold most function names for the
     initializations of __FUNCTION__ and __PRETTY_FUNCTION__.  */
  short_array_type_node = build_prim_array_type (short_type_node, 200);
#endif
  char_type_node = make_node (CHAR_TYPE);
  TYPE_PRECISION (char_type_node) = 16;
  fixup_unsigned_type (char_type_node);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("char"), char_type_node));

  boolean_type_node = make_node (BOOLEAN_TYPE);
  TYPE_PRECISION (boolean_type_node) = 1;
  fixup_unsigned_type (boolean_type_node);
  pushdecl (build_decl (TYPE_DECL, get_identifier ("boolean"),
			boolean_type_node));
  boolean_false_node = TYPE_MIN_VALUE (boolean_type_node);
  boolean_true_node = TYPE_MAX_VALUE (boolean_type_node);

  promoted_byte_type_node
    = push_promoted_type ("promoted_byte", byte_type_node);
  promoted_short_type_node
    = push_promoted_type ("promoted_short", short_type_node);
  promoted_char_type_node
    = push_promoted_type ("promoted_char", char_type_node);
  promoted_boolean_type_node
    = push_promoted_type ("promoted_boolean", boolean_type_node);

  float_type_node = make_node (REAL_TYPE);
  TYPE_PRECISION (float_type_node) = 32;
  pushdecl (build_decl (TYPE_DECL, get_identifier ("float"),
                        float_type_node));
  layout_type (float_type_node);

  double_type_node = make_node (REAL_TYPE);
  TYPE_PRECISION (double_type_node) = 64;
  pushdecl (build_decl (TYPE_DECL, get_identifier ("double"),
                        double_type_node));
  layout_type (double_type_node);

  float_zero_node = build_real (float_type_node, dconst0);
  double_zero_node = build_real (double_type_node, dconst0);

  /* These are the vtables for arrays of primitives.  */
  boolean_array_vtable = create_primitive_vtable ("boolean");
  byte_array_vtable = create_primitive_vtable ("byte");
  char_array_vtable = create_primitive_vtable ("char");
  short_array_vtable = create_primitive_vtable ("short");
  int_array_vtable = create_primitive_vtable ("int");
  long_array_vtable = create_primitive_vtable ("long");
  float_array_vtable = create_primitive_vtable ("float");
  double_array_vtable = create_primitive_vtable ("double");

  one_elt_array_domain_type = build_index_type (integer_one_node);
  utf8const_type = make_node (RECORD_TYPE);
  PUSH_FIELD (utf8const_type, field, "hash", unsigned_short_type_node);
  PUSH_FIELD (utf8const_type, field, "length", unsigned_short_type_node);
  FINISH_RECORD (utf8const_type);
  utf8const_ptr_type = build_pointer_type (utf8const_type);

  atable_type = build_array_type (ptr_type_node, 
				  one_elt_array_domain_type);
  TYPE_NONALIASED_COMPONENT (atable_type) = 1;
  atable_ptr_type = build_pointer_type (atable_type);

  itable_type = build_array_type (ptr_type_node, 
				  one_elt_array_domain_type);
  TYPE_NONALIASED_COMPONENT (itable_type) = 1;
  itable_ptr_type = build_pointer_type (itable_type);

  symbol_type = make_node (RECORD_TYPE);
  PUSH_FIELD (symbol_type, field, "clname", utf8const_ptr_type);
  PUSH_FIELD (symbol_type, field, "name", utf8const_ptr_type);
  PUSH_FIELD (symbol_type, field, "signature", utf8const_ptr_type);
  FINISH_RECORD (symbol_type);

  symbols_array_type = build_array_type (symbol_type, 
					 one_elt_array_domain_type);
  symbols_array_ptr_type = build_pointer_type (symbols_array_type);

  assertion_entry_type = make_node (RECORD_TYPE);
  PUSH_FIELD (assertion_entry_type, field, "assertion_code", integer_type_node);
  PUSH_FIELD (assertion_entry_type, field, "op1", utf8const_ptr_type);
  PUSH_FIELD (assertion_entry_type, field, "op2", utf8const_ptr_type);
  FINISH_RECORD (assertion_entry_type);
  
  assertion_table_type = build_array_type (assertion_entry_type,
                                           one_elt_array_domain_type);

  /* As you're adding items here, please update the code right after
     this section, so that the filename containing the source code of
     the pre-defined class gets registered correctly. */
  unqualified_object_id_node = get_identifier ("Object");
  object_type_node = lookup_class (get_identifier ("java.lang.Object"));
  object_ptr_type_node = promote_type (object_type_node);
  string_type_node = lookup_class (get_identifier ("java.lang.String"));
  string_ptr_type_node = promote_type (string_type_node);
  class_type_node = lookup_class (get_identifier ("java.lang.Class"));
  throwable_type_node = lookup_class (get_identifier ("java.lang.Throwable"));
  exception_type_node = lookup_class (get_identifier ("java.lang.Exception"));
  runtime_exception_type_node = 
    lookup_class (get_identifier ("java.lang.RuntimeException"));
  error_exception_type_node = 
    lookup_class (get_identifier ("java.lang.Error"));

  rawdata_ptr_type_node
    = promote_type (lookup_class (get_identifier ("gnu.gcj.RawData")));

  add_predefined_file (get_identifier ("java/lang/Class.java"));
  add_predefined_file (get_identifier ("java/lang/Error.java"));
  add_predefined_file (get_identifier ("java/lang/Object.java"));
  add_predefined_file (get_identifier ("java/lang/RuntimeException.java"));
  add_predefined_file (get_identifier ("java/lang/String.java"));
  add_predefined_file (get_identifier ("java/lang/Throwable.java"));
  add_predefined_file (get_identifier ("gnu/gcj/RawData.java"));
  add_predefined_file (get_identifier ("java/lang/Exception.java"));
  add_predefined_file (get_identifier ("java/lang/ClassNotFoundException.java"));
  add_predefined_file (get_identifier ("java/lang/NoClassDefFoundError.java"));

  methodtable_type = make_node (RECORD_TYPE);
  layout_type (methodtable_type);
  build_decl (TYPE_DECL, get_identifier ("methodtable"), methodtable_type);
  methodtable_ptr_type = build_pointer_type (methodtable_type);

  TYPE_identifier_node = get_identifier ("TYPE");
  init_identifier_node = get_identifier ("<init>");
  clinit_identifier_node = get_identifier ("<clinit>");
  finit_identifier_node = get_identifier ("finit$");
  instinit_identifier_node = get_identifier ("instinit$");
  void_signature_node = get_identifier ("()V");
  length_identifier_node = get_identifier ("length");
  finalize_identifier_node = get_identifier ("finalize");
  this_identifier_node = get_identifier ("this");
  super_identifier_node = get_identifier ("super");
  continue_identifier_node = get_identifier ("continue");
  access0_identifier_node = get_identifier ("access$0");
  classdollar_identifier_node = get_identifier ("class$");

  java_lang_cloneable_identifier_node = get_identifier ("java.lang.Cloneable");
  java_io_serializable_identifier_node =
    get_identifier ("java.io.Serializable");

  /* for lack of a better place to put this stub call */
  init_expr_processing();

  constants_type_node = make_node (RECORD_TYPE);
  PUSH_FIELD (constants_type_node, field, "size", unsigned_int_type_node);
  PUSH_FIELD (constants_type_node, field, "tags", ptr_type_node);
  PUSH_FIELD (constants_type_node, field, "data", ptr_type_node);
  FINISH_RECORD (constants_type_node);
  build_decl (TYPE_DECL, get_identifier ("constants"), constants_type_node);

  access_flags_type_node = unsigned_short_type_node;

  dtable_type = make_node (RECORD_TYPE);
  dtable_ptr_type = build_pointer_type (dtable_type);

  otable_type = build_array_type (integer_type_node, 
				  one_elt_array_domain_type);
  TYPE_NONALIASED_COMPONENT (otable_type) = 1;
  otable_ptr_type = build_pointer_type (otable_type);

  PUSH_FIELD (object_type_node, field, "vtable", dtable_ptr_type);
  DECL_FCONTEXT (field) = object_type_node;
  TYPE_VFIELD (object_type_node) = field;

  /* This isn't exactly true, but it is what we have in the source.
     There is an unresolved issue here, which is whether the vtable
     should be marked by the GC.  */
  if (! flag_hash_synchronization)
    PUSH_FIELD (object_type_node, field, "sync_info",
		build_pointer_type (object_type_node));
  for (t = TYPE_FIELDS (object_type_node); t != NULL_TREE; t = TREE_CHAIN (t))
    FIELD_PRIVATE (t) = 1;
  FINISH_RECORD (object_type_node);

  field_type_node = make_node (RECORD_TYPE);
  field_ptr_type_node = build_pointer_type (field_type_node);
  method_type_node = make_node (RECORD_TYPE);
  method_ptr_type_node = build_pointer_type (method_type_node);

  set_super_info (0, class_type_node, object_type_node, 0);
  set_super_info (0, string_type_node, object_type_node, 0);
  class_ptr_type = build_pointer_type (class_type_node);

  PUSH_FIELD (class_type_node, field, "next_or_version", class_ptr_type);
  PUSH_FIELD (class_type_node, field, "name", utf8const_ptr_type);
  PUSH_FIELD (class_type_node, field, "accflags", access_flags_type_node);
  PUSH_FIELD (class_type_node, field, "superclass", class_ptr_type);
  PUSH_FIELD (class_type_node, field, "constants", constants_type_node);
  PUSH_FIELD (class_type_node, field, "methods", method_ptr_type_node);
  PUSH_FIELD (class_type_node, field, "method_count", short_type_node);
  PUSH_FIELD (class_type_node, field, "vtable_method_count", short_type_node);
  PUSH_FIELD (class_type_node, field, "fields", field_ptr_type_node);
  PUSH_FIELD (class_type_node, field, "size_in_bytes", int_type_node);
  PUSH_FIELD (class_type_node, field, "field_count", short_type_node);
  PUSH_FIELD (class_type_node, field, "static_field_count", short_type_node);
  PUSH_FIELD (class_type_node, field, "vtable", dtable_ptr_type);
  PUSH_FIELD (class_type_node, field, "otable", otable_ptr_type);
  PUSH_FIELD (class_type_node, field, "otable_syms", 
  	      symbols_array_ptr_type);
  PUSH_FIELD (class_type_node, field, "atable", atable_ptr_type);
  PUSH_FIELD (class_type_node, field, "atable_syms", 
  	      symbols_array_ptr_type);
  PUSH_FIELD (class_type_node, field, "itable", itable_ptr_type);
  PUSH_FIELD (class_type_node, field, "itable_syms", 
  	      symbols_array_ptr_type);
  PUSH_FIELD (class_type_node, field, "catch_classes", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "interfaces",
	      build_pointer_type (class_ptr_type));
  PUSH_FIELD (class_type_node, field, "loader", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "interface_count", short_type_node);
  PUSH_FIELD (class_type_node, field, "state", byte_type_node);
  PUSH_FIELD (class_type_node, field, "thread", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "depth", short_type_node);
  PUSH_FIELD (class_type_node, field, "ancestors", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "idt", ptr_type_node);  
  PUSH_FIELD (class_type_node, field, "arrayclass", ptr_type_node);  
  PUSH_FIELD (class_type_node, field, "protectionDomain", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "assertion_table", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "hack_signers", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "chain", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "aux_info", ptr_type_node);
  PUSH_FIELD (class_type_node, field, "engine", ptr_type_node);
  for (t = TYPE_FIELDS (class_type_node);  t != NULL_TREE;  t = TREE_CHAIN (t))
    FIELD_PRIVATE (t) = 1;
  push_super_field (class_type_node, object_type_node);

  FINISH_RECORD (class_type_node);
  build_decl (TYPE_DECL, get_identifier ("Class"), class_type_node);

  field_info_union_node = make_node (UNION_TYPE);
  PUSH_FIELD (field_info_union_node, field, "boffset", int_type_node);
  PUSH_FIELD (field_info_union_node, field, "addr", ptr_type_node);
#if 0
  PUSH_FIELD (field_info_union_node, field, "idx", unsigned_short_type_node);
#endif
  layout_type (field_info_union_node);

  PUSH_FIELD (field_type_node, field, "name", utf8const_ptr_type);
  PUSH_FIELD (field_type_node, field, "type", class_ptr_type);
  PUSH_FIELD (field_type_node, field, "accflags", access_flags_type_node);
  PUSH_FIELD (field_type_node, field, "bsize", unsigned_short_type_node);
  PUSH_FIELD (field_type_node, field, "info", field_info_union_node);
  FINISH_RECORD (field_type_node);
  build_decl (TYPE_DECL, get_identifier ("Field"), field_type_node);

  nativecode_ptr_array_type_node
    = build_array_type (nativecode_ptr_type_node, one_elt_array_domain_type);

  PUSH_FIELD (dtable_type, field, "class", class_ptr_type);
  PUSH_FIELD (dtable_type, field, "methods", nativecode_ptr_array_type_node);
  FINISH_RECORD (dtable_type);
  build_decl (TYPE_DECL, get_identifier ("dispatchTable"), dtable_type);

  jexception_type = make_node (RECORD_TYPE);
  PUSH_FIELD (jexception_type, field, "start_pc", ptr_type_node);
  PUSH_FIELD (jexception_type, field, "end_pc", ptr_type_node);
  PUSH_FIELD (jexception_type, field, "handler_pc", ptr_type_node);
  PUSH_FIELD (jexception_type, field, "catch_type", class_ptr_type);
  FINISH_RECORD (jexception_type);
  build_decl (TYPE_DECL, get_identifier ("jexception"), field_type_node);
  jexception_ptr_type = build_pointer_type (jexception_type);

  lineNumberEntry_type = make_node (RECORD_TYPE);
  PUSH_FIELD (lineNumberEntry_type, field, "line_nr", unsigned_short_type_node);
  PUSH_FIELD (lineNumberEntry_type, field, "start_pc", ptr_type_node);
  FINISH_RECORD (lineNumberEntry_type);

  lineNumbers_type = make_node (RECORD_TYPE);
  PUSH_FIELD (lineNumbers_type, field, "length", unsigned_int_type_node);
  FINISH_RECORD (lineNumbers_type);

  PUSH_FIELD (method_type_node, field, "name", utf8const_ptr_type);
  PUSH_FIELD (method_type_node, field, "signature", utf8const_ptr_type);
  PUSH_FIELD (method_type_node, field, "accflags", access_flags_type_node);
  PUSH_FIELD (method_type_node, field, "index", unsigned_short_type_node);
  PUSH_FIELD (method_type_node, field, "ncode", nativecode_ptr_type_node);
  PUSH_FIELD (method_type_node, field, "throws", ptr_type_node);
  FINISH_RECORD (method_type_node);
  build_decl (TYPE_DECL, get_identifier ("Method"), method_type_node);

  endlink = end_params_node = tree_cons (NULL_TREE, void_type_node, NULL_TREE);

  t = tree_cons (NULL_TREE, class_ptr_type,
		 tree_cons (NULL_TREE, int_type_node, endlink));
  alloc_object_node = builtin_function ("_Jv_AllocObject",
					build_function_type (ptr_type_node, t),
					0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_MALLOC (alloc_object_node) = 1;
  alloc_no_finalizer_node = 
    builtin_function ("_Jv_AllocObjectNoFinalizer",
		      build_function_type (ptr_type_node, t),
		      0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_MALLOC (alloc_no_finalizer_node) = 1;

  t = tree_cons (NULL_TREE, ptr_type_node, endlink);
  soft_initclass_node = builtin_function ("_Jv_InitClass",
					  build_function_type (void_type_node,
							       t),
					  0, NOT_BUILT_IN, NULL, NULL_TREE);

  throw_node = builtin_function ("_Jv_Throw",
				 build_function_type (ptr_type_node, t),
				 0, NOT_BUILT_IN, NULL, NULL_TREE);
  /* Mark throw_nodes as `noreturn' functions with side effects.  */
  TREE_THIS_VOLATILE (throw_node) = 1;
  TREE_SIDE_EFFECTS (throw_node) = 1;

  t = build_function_type (int_type_node, endlink);
  soft_monitorenter_node 
    = builtin_function ("_Jv_MonitorEnter", t, 0, NOT_BUILT_IN,
			NULL, NULL_TREE);
  soft_monitorexit_node 
    = builtin_function ("_Jv_MonitorExit", t, 0, NOT_BUILT_IN,
			NULL, NULL_TREE);
  
  t = tree_cons (NULL_TREE, int_type_node, 
		 tree_cons (NULL_TREE, int_type_node, endlink));
  soft_newarray_node
      = builtin_function ("_Jv_NewPrimArray",
			  build_function_type(ptr_type_node, t),
			  0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_MALLOC (soft_newarray_node) = 1;

  t = tree_cons (NULL_TREE, int_type_node,
		 tree_cons (NULL_TREE, class_ptr_type,
			    tree_cons (NULL_TREE, object_ptr_type_node, endlink)));
  soft_anewarray_node
      = builtin_function ("_Jv_NewObjectArray",
			  build_function_type (ptr_type_node, t),
			  0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_MALLOC (soft_anewarray_node) = 1;

  /* There is no endlink here because _Jv_NewMultiArray is a varargs
     function.  */
  t = tree_cons (NULL_TREE, ptr_type_node,
		 tree_cons (NULL_TREE, int_type_node, NULL_TREE));
  soft_multianewarray_node
      = builtin_function ("_Jv_NewMultiArray",
			  build_function_type (ptr_type_node, t),
			  0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_MALLOC (soft_multianewarray_node) = 1;

  t = build_function_type (void_type_node, 
			   tree_cons (NULL_TREE, int_type_node, endlink));
  soft_badarrayindex_node
      = builtin_function ("_Jv_ThrowBadArrayIndex", t, 
			  0, NOT_BUILT_IN, NULL, NULL_TREE);
  /* Mark soft_badarrayindex_node as a `noreturn' function with side
     effects.  */
  TREE_THIS_VOLATILE (soft_badarrayindex_node) = 1;
  TREE_SIDE_EFFECTS (soft_badarrayindex_node) = 1;

  soft_nullpointer_node
    = builtin_function ("_Jv_ThrowNullPointerException",
			build_function_type (void_type_node, endlink),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  /* Mark soft_nullpointer_node as a `noreturn' function with side
     effects.  */
  TREE_THIS_VOLATILE (soft_nullpointer_node) = 1;
  TREE_SIDE_EFFECTS (soft_nullpointer_node) = 1;

  t = tree_cons (NULL_TREE, class_ptr_type,
		 tree_cons (NULL_TREE, object_ptr_type_node, endlink));
  soft_checkcast_node
    = builtin_function ("_Jv_CheckCast",
			build_function_type (ptr_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  t = tree_cons (NULL_TREE, object_ptr_type_node,
		 tree_cons (NULL_TREE, class_ptr_type, endlink));
  soft_instanceof_node
    = builtin_function ("_Jv_IsInstanceOf",
			build_function_type (boolean_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_PURE (soft_instanceof_node) = 1;
  t = tree_cons (NULL_TREE, object_ptr_type_node,
		 tree_cons (NULL_TREE, object_ptr_type_node, endlink));
  soft_checkarraystore_node
    = builtin_function ("_Jv_CheckArrayStore",
			build_function_type (void_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  t = tree_cons (NULL_TREE, ptr_type_node,
		 tree_cons (NULL_TREE, ptr_type_node,
			    tree_cons (NULL_TREE, int_type_node, endlink)));
  soft_lookupinterfacemethod_node 
    = builtin_function ("_Jv_LookupInterfaceMethodIdx",
			build_function_type (ptr_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  DECL_IS_PURE (soft_lookupinterfacemethod_node) = 1;
  t = tree_cons (NULL_TREE, ptr_type_node,
		 tree_cons (NULL_TREE, ptr_type_node,
			    tree_cons (NULL_TREE, ptr_type_node, endlink)));
  soft_lookupinterfacemethodbyname_node 
    = builtin_function ("_Jv_LookupInterfaceMethod",
			build_function_type (ptr_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  t = tree_cons (NULL_TREE, object_ptr_type_node,
		 tree_cons (NULL_TREE, ptr_type_node,
			    tree_cons (NULL_TREE, ptr_type_node, 
			               tree_cons (NULL_TREE, int_type_node, 
				                  endlink))));
  soft_lookupjnimethod_node
    = builtin_function ("_Jv_LookupJNIMethod",
			build_function_type (ptr_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  t = tree_cons (NULL_TREE, ptr_type_node, endlink);
  soft_getjnienvnewframe_node
    = builtin_function ("_Jv_GetJNIEnvNewFrame",
			build_function_type (ptr_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);
  soft_jnipopsystemframe_node
    = builtin_function ("_Jv_JNI_PopSystemFrame",
			build_function_type (ptr_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);

  soft_idiv_node
    = builtin_function ("_Jv_divI",
			build_function_type (int_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);

  soft_irem_node
    = builtin_function ("_Jv_remI",
			build_function_type (int_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);

  soft_ldiv_node
    = builtin_function ("_Jv_divJ",
			build_function_type (long_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);

  soft_lrem_node
    = builtin_function ("_Jv_remJ",
			build_function_type (long_type_node, t),
			0, NOT_BUILT_IN, NULL, NULL_TREE);

  /* Initialize variables for except.c.  */
  eh_personality_libfunc = init_one_libfunc (USING_SJLJ_EXCEPTIONS
                                             ? "__gcj_personality_sj0"
                                             : "__gcj_personality_v0");

  lang_eh_runtime_type = do_nothing;

  init_jcf_parse ();
    
  initialize_builtins ();
  soft_fmod_node = built_in_decls[BUILT_IN_FMOD];
#if 0
  soft_fmodf_node = built_in_decls[BUILT_IN_FMODF];
#endif

  parse_version ();
}


/* Look up NAME in the current binding level and its superiors
   in the namespace of variables, functions and typedefs.
   Return a ..._DECL node of some kind representing its definition,
   or return 0 if it is undefined.  */

tree
lookup_name (tree name)
{
  tree val;
  if (current_binding_level != global_binding_level
      && IDENTIFIER_LOCAL_VALUE (name))
    val = IDENTIFIER_LOCAL_VALUE (name);
  else
    val = IDENTIFIER_GLOBAL_VALUE (name);
  return val;
}

/* Similar to `lookup_name' but look only at current binding level and
   the previous one if its the parameter level.  */

static tree
lookup_name_current_level (tree name)
{
  tree t;

  if (current_binding_level == global_binding_level)
    return IDENTIFIER_GLOBAL_VALUE (name);

  if (IDENTIFIER_LOCAL_VALUE (name) == 0)
    return 0;

  for (t = current_binding_level->names; t; t = TREE_CHAIN (t))
    if (DECL_NAME (t) == name)
      break;

  return t;
}

/* Use a binding level to record a labeled block declaration */

void
push_labeled_block (tree lb)
{
  tree name = DECL_NAME (LABELED_BLOCK_LABEL (lb));
  struct binding_level *b = current_binding_level;
  tree oldlocal = IDENTIFIER_LOCAL_VALUE (name);
  if (oldlocal != 0)
      b->shadowed = tree_cons (name, oldlocal, b->shadowed);
  TREE_CHAIN (lb) = b->names;
  b->names = lb;
  IDENTIFIER_LOCAL_VALUE (name) = lb;
}

/* Pop the current binding level, reinstalling values for the previous
   labeled block */

void
pop_labeled_block (void)
{
  struct binding_level *b = current_binding_level;
  tree label =  b->names;
  IDENTIFIER_LOCAL_VALUE (DECL_NAME (LABELED_BLOCK_LABEL (label))) = 
    NULL_TREE;
  if (b->shadowed)
    IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (b->shadowed)) = 
      TREE_VALUE (b->shadowed);

  /* Pop the current level, and free the structure for reuse.  */
  current_binding_level = current_binding_level->level_chain;
  b->level_chain = free_binding_level;
  free_binding_level = b;
}

/* Record a decl-node X as belonging to the current lexical scope.
   Check for errors (such as an incompatible declaration for the same
   name already seen in the same scope).

   Returns either X or an old decl for the same name.
   If an old decl is returned, it may have been smashed
   to agree with what X says.  */

tree
pushdecl (tree x)
{
  tree t;
  tree name = DECL_NAME (x);
  struct binding_level *b = current_binding_level;
  
  if (TREE_CODE (x) != TYPE_DECL)
    DECL_CONTEXT (x) = current_function_decl;
  if (name)
    {
      t = lookup_name_current_level (name);
      if (t != 0 && t == error_mark_node)
	/* error_mark_node is 0 for a while during initialization!  */
	{
	  t = 0;
	  error ("%J'%D' used prior to declaration", x, x);
	}

      /* If we're naming a hitherto-unnamed type, set its TYPE_NAME
	 to point to the TYPE_DECL.
	 Since Java does not have typedefs, a type can only have
	 one (true) name, given by a class, interface, or builtin. */
      if (TREE_CODE (x) == TYPE_DECL
	  && TYPE_NAME (TREE_TYPE (x)) == 0
	  && TREE_TYPE (x) != error_mark_node)
	{
	  TYPE_NAME (TREE_TYPE (x)) = x;
	  TYPE_STUB_DECL (TREE_TYPE (x)) = x;
	}

      /* This name is new in its binding level.
	 Install the new declaration and return it.  */
      if (b == global_binding_level)
	{
	  /* Install a global value.  */
	  
	  IDENTIFIER_GLOBAL_VALUE (name) = x;
	}
      else
	{
	  /* Here to install a non-global value.  */
	  tree oldlocal = IDENTIFIER_LOCAL_VALUE (name);
	  IDENTIFIER_LOCAL_VALUE (name) = x;

#if 0
	  /* Warn if shadowing an argument at the top level of the body.  */
	  if (oldlocal != 0 && !DECL_EXTERNAL (x)
	      /* This warning doesn't apply to the parms of a nested fcn.  */
	      && ! current_binding_level->parm_flag
	      /* Check that this is one level down from the parms.  */
	      && current_binding_level->level_chain->parm_flag
	      /* Check that the decl being shadowed
		 comes from the parm level, one level up.  */
	      && chain_member (oldlocal, current_binding_level->level_chain->names))
	    {
	      if (TREE_CODE (oldlocal) == PARM_DECL)
		pedwarn ("declaration of %qs shadows a parameter",
			 IDENTIFIER_POINTER (name));
	      else
		pedwarn ("declaration of %qs shadows a symbol from the parameter list",
			 IDENTIFIER_POINTER (name));
	    }

	  /* Maybe warn if shadowing something else.  */
	  else if (warn_shadow && !DECL_EXTERNAL (x)
		   /* No shadow warnings for internally generated vars.  */
		   && DECL_SOURCE_LINE (x) != 0
		   /* No shadow warnings for vars made for inlining.  */
		   && ! DECL_FROM_INLINE (x))
	    {
	      const char *warnstring = 0;

	      if (TREE_CODE (x) == PARM_DECL
		  && current_binding_level->level_chain->parm_flag)
		/* Don't warn about the parm names in function declarator
		   within a function declarator.
		   It would be nice to avoid warning in any function
		   declarator in a declaration, as opposed to a definition,
		   but there is no way to tell it's not a definition.  */
		;
	      else if (oldlocal != 0 && TREE_CODE (oldlocal) == PARM_DECL)
		warnstring = "declaration of %qs shadows a parameter";
	      else if (oldlocal != 0)
		warnstring = "declaration of %qs shadows previous local";
	      else if (IDENTIFIER_GLOBAL_VALUE (name) != 0
		       && IDENTIFIER_GLOBAL_VALUE (name) != error_mark_node)
		warnstring = "declaration of %qs shadows global declaration";

	      if (warnstring)
		warning (warnstring, IDENTIFIER_POINTER (name));
	    }
#endif

	  /* If storing a local value, there may already be one (inherited).
	     If so, record it for restoration when this binding level ends.  */
	  if (oldlocal != 0)
	    b->shadowed = tree_cons (name, oldlocal, b->shadowed);
	}
    }

  /* Put decls on list in reverse order.
     We will reverse them later if necessary.  */
  TREE_CHAIN (x) = b->names;
  b->names = x;

  return x;
}

void
pushdecl_force_head (tree x)
{
  current_binding_level->names = x;
}

/* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL, if appropriate.  */

tree
pushdecl_top_level (tree x)
{
  tree t;
  struct binding_level *b = current_binding_level;

  current_binding_level = global_binding_level;
  t = pushdecl (x);
  current_binding_level = b;
  return t;
}

/* Like pushdecl, only it places X in FUNCTION_BINDING_LEVEL, if appropriate.  */

tree
pushdecl_function_level (tree x)
{
  tree t;
  struct binding_level *b = current_binding_level;

  current_binding_level = function_binding_level;
  t = pushdecl (x);
  current_binding_level = b;
  return t;
}

/* Nonzero if we are currently in the global binding level.  */

int
global_bindings_p (void)
{
  return current_binding_level == global_binding_level;
}

/* Return the list of declarations of the current level.
   Note that this list is in reverse order unless/until
   you nreverse it; and when you do nreverse it, you must
   store the result back using `storedecls' or you will lose.  */

tree
getdecls (void)
{
  return current_binding_level->names;
}

/* Create a new `struct binding_level'.  */

static struct binding_level *
make_binding_level (void)
{
  /* NOSTRICT */
  return ggc_alloc_cleared (sizeof (struct binding_level));
}

void
pushlevel (int unused ATTRIBUTE_UNUSED)
{
  struct binding_level *newlevel = NULL_BINDING_LEVEL;

#if 0
  /* If this is the top level of a function,
     just make sure that NAMED_LABELS is 0.  */

  if (current_binding_level == global_binding_level)
    named_labels = 0;
#endif

  /* Reuse or create a struct for this binding level.  */

  if (free_binding_level)
    {
      newlevel = free_binding_level;
      free_binding_level = free_binding_level->level_chain;
    }
  else
    {
      newlevel = make_binding_level ();
    }

  /* Add this level to the front of the chain (stack) of levels that
     are active.  */

  *newlevel = clear_binding_level;
  newlevel->level_chain = current_binding_level;
  current_binding_level = newlevel;
#if defined(DEBUG_JAVA_BINDING_LEVELS)
  newlevel->binding_depth = binding_depth;
  indent ();
  fprintf (stderr, "push %s level %p pc %d\n",
	   (is_class_level) ? "class" : "block", newlevel, current_pc);
  is_class_level = 0;
  binding_depth++;
#endif /* defined(DEBUG_JAVA_BINDING_LEVELS) */
}

/* Exit a binding level.
   Pop the level off, and restore the state of the identifier-decl mappings
   that were in effect when this level was entered.

   If KEEP is nonzero, this level had explicit declarations, so
   and create a "block" (a BLOCK node) for the level
   to record its declarations and subblocks for symbol table output.

   If FUNCTIONBODY is nonzero, this level is the body of a function,
   so create a block as if KEEP were set and also clear out all
   label names.

   If REVERSE is nonzero, reverse the order of decls before putting
   them into the BLOCK.  */

tree
poplevel (int keep, int reverse, int functionbody)
{
  tree link;
  /* The chain of decls was accumulated in reverse order.
     Put it into forward order, just for cleanliness.  */
  tree decls;
  tree subblocks = current_binding_level->blocks;
  tree block = 0;
  tree decl;
  tree bind = 0;

#if defined(DEBUG_JAVA_BINDING_LEVELS)
  binding_depth--;
  indent ();
  if (current_binding_level->end_pc != LARGEST_PC)
    fprintf (stderr, "pop  %s level %p pc %d (end pc %d)\n",
	     (is_class_level) ? "class" : "block", current_binding_level, current_pc,
	     current_binding_level->end_pc);
  else
    fprintf (stderr, "pop  %s level %p pc %d\n",
	     (is_class_level) ? "class" : "block", current_binding_level, current_pc);
#if 0
  if (is_class_level != (current_binding_level == class_binding_level))
    {
      indent ();
      fprintf (stderr, "XXX is_class_level != (current_binding_level == class_binding_level)\n");
    }
  is_class_level = 0;
#endif
#endif /* defined(DEBUG_JAVA_BINDING_LEVELS) */

  /* Get the decls in the order they were written.
     Usually current_binding_level->names is in reverse order.
     But parameter decls were previously put in forward order.  */

  if (reverse)
    current_binding_level->names
      = decls = nreverse (current_binding_level->names);
  else
    decls = current_binding_level->names;

  for (decl = decls; decl; decl = TREE_CHAIN (decl))
    if (TREE_CODE (decl) == VAR_DECL
	&& DECL_LANG_SPECIFIC (decl) != NULL
	&& DECL_LOCAL_SLOT_NUMBER (decl))
      LOCAL_VAR_OUT_OF_SCOPE_P (decl) = 1;

  /* If there were any declarations in that level,
     or if this level is a function body,
     create a BLOCK to record them for the life of this function.  */

  block = 0;
  if (keep || functionbody)
    {
      block = make_node (BLOCK);
      TREE_TYPE (block) = void_type_node;
    }

  if (current_binding_level->exception_range)
    expand_end_java_handler (current_binding_level->exception_range);

  if (block != 0)
    {
      /* If any statements have been generated at this level, create a
	 BIND_EXPR to hold them and copy the variables to it.  This
	 only applies to the bytecode compiler.  */
      if (current_binding_level->stmts)
	{
	  tree decl = decls;
	  tree *var = &BLOCK_VARS (block);

	  /* Copy decls from names list, ignoring labels.  */
	  while (decl)
	    {
	      tree next = TREE_CHAIN (decl);
	      if (TREE_CODE (decl) != LABEL_DECL)
		{
		  *var = decl;
		  var = &TREE_CHAIN (decl);
		}
	      decl = next;
	    }
	  *var = NULL;
	    
	  bind = build3 (BIND_EXPR, TREE_TYPE (block), BLOCK_VARS (block), 
			 BLOCK_EXPR_BODY (block), block);
	  BIND_EXPR_BODY (bind) = current_binding_level->stmts;
	  
	  if (BIND_EXPR_BODY (bind)
	      && TREE_SIDE_EFFECTS (BIND_EXPR_BODY (bind)))
	    TREE_SIDE_EFFECTS (bind) = 1;
	  
	  /* FIXME: gimplifier brain damage.  */
	  if (BIND_EXPR_BODY (bind) == NULL)
	    BIND_EXPR_BODY (bind) = build_java_empty_stmt ();

	  current_binding_level->stmts = NULL;
	}
      else
	{
	  BLOCK_VARS (block) = decls;
	}
      BLOCK_SUBBLOCKS (block) = subblocks;
    }	

  /* In each subblock, record that this is its superior.  */

  for (link = subblocks; link; link = TREE_CHAIN (link))
    BLOCK_SUPERCONTEXT (link) = block;

  /* Clear out the meanings of the local variables of this level.  */

  for (link = decls; link; link = TREE_CHAIN (link))
    {
      tree name = DECL_NAME (link);
      if (name != 0 && IDENTIFIER_LOCAL_VALUE (name) == link)
	{
	  /* If the ident. was used or addressed via a local extern decl,
	     don't forget that fact.  */
	  if (DECL_EXTERNAL (link))
	    {
	      if (TREE_USED (link))
		TREE_USED (name) = 1;
	      if (TREE_ADDRESSABLE (link))
		TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (link)) = 1;
	    }
	  IDENTIFIER_LOCAL_VALUE (name) = 0;
	}
    }

  /* Restore all name-meanings of the outer levels
     that were shadowed by this level.  */

  for (link = current_binding_level->shadowed; link; link = TREE_CHAIN (link))
    IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link);

  /* If the level being exited is the top level of a function,
     check over all the labels, and clear out the current
     (function local) meanings of their names.  */

  if (functionbody)
    {
      /* If this is the top level block of a function,
	 the vars are the function's parameters.
	 Don't leave them in the BLOCK because they are
	 found in the FUNCTION_DECL instead.  */

      BLOCK_VARS (block) = 0;

      /* Clear out the definitions of all label names,
	 since their scopes end here,
	 and add them to BLOCK_VARS.  */

#if 0
      for (link = named_labels; link; link = TREE_CHAIN (link))
	{
	  tree label = TREE_VALUE (link);

	  if (DECL_INITIAL (label) == 0)
	    {
	      error ("%Jlabel '%D' used but not defined", label, label);
	      /* Avoid crashing later.  */
	      define_label (input_location, DECL_NAME (label));
	    }
	  else if (warn_unused[UNUSED_LABEL] && !TREE_USED (label))
	    warning ("%Jlabel '%D' defined but not used", label, label);
	  IDENTIFIER_LABEL_VALUE (DECL_NAME (label)) = 0;

	  /* Put the labels into the "variables" of the
	     top-level block, so debugger can see them.  */
	  TREE_CHAIN (label) = BLOCK_VARS (block);
	  BLOCK_VARS (block) = label;
	}
#endif
    }

  /* Pop the current level, and free the structure for reuse.  */

  {
    struct binding_level *level = current_binding_level;
    current_binding_level = current_binding_level->level_chain;

    level->level_chain = free_binding_level;
    free_binding_level = level;
  }

  /* Dispose of the block that we just made inside some higher level.  */
  if (functionbody)
    {
      DECL_INITIAL (current_function_decl) = block;
      DECL_SAVED_TREE (current_function_decl) = bind;
    }
  else 
    {
      if (block)
	{
	  current_binding_level->blocks
	    = chainon (current_binding_level->blocks, block);
	}
      /* If we did not make a block for the level just exited,
	 any blocks made for inner levels
	 (since they cannot be recorded as subblocks in that level)
	 must be carried forward so they will later become subblocks
	 of something else.  */
      else if (subblocks)
	current_binding_level->blocks
	  = chainon (current_binding_level->blocks, subblocks);

      if (bind)
	java_add_stmt (bind);
    }

  if (block)
    TREE_USED (block) = 1;
  return block;
}

void
maybe_pushlevels (int pc)
{
#if defined(DEBUG_JAVA_BINDING_LEVELS)
  current_pc = pc;
#endif

  while (pending_local_decls != NULL_TREE &&
	 DECL_LOCAL_START_PC (pending_local_decls) <= pc)
    {
      tree *ptr = &pending_local_decls;
      tree decl = *ptr, next;
      int end_pc = DECL_LOCAL_END_PC (decl);

      while (*ptr != NULL_TREE
	     && DECL_LOCAL_START_PC (*ptr) <= pc
	     && DECL_LOCAL_END_PC (*ptr) == end_pc)
	ptr = &TREE_CHAIN (*ptr);
      pending_local_decls = *ptr;
      *ptr = NULL_TREE;

      /* Force non-nested range to be nested in current range by
	 truncating variable lifetimes. */
      if (end_pc > current_binding_level->end_pc)
	{
	  end_pc = current_binding_level->end_pc;
	  DECL_LOCAL_END_PC (decl) = end_pc;
	}

      maybe_start_try (pc, end_pc);
      
      pushlevel (1);

      current_binding_level->end_pc = end_pc;
      current_binding_level->start_pc = pc;      
      current_binding_level->names = NULL;
      for ( ; decl != NULL_TREE; decl = next)
	{
	  next = TREE_CHAIN (decl);
	  push_jvm_slot (DECL_LOCAL_SLOT_NUMBER (decl), decl);
	  pushdecl (decl);
	  initialize_local_variable (decl, DECL_LOCAL_SLOT_NUMBER (decl));
	}
    }      

  maybe_start_try (pc, 0);
}

void
maybe_poplevels (int pc)
{
#if defined(DEBUG_JAVA_BINDING_LEVELS)
  current_pc = pc;
#endif

  while (current_binding_level->end_pc <= pc)
    poplevel (1, 0, 0);
}

/* Terminate any binding which began during the range beginning at
   start_pc.  This tidies up improperly nested local variable ranges
   and exception handlers; a variable declared within an exception
   range is forcibly terminated when that exception ends. */

void
force_poplevels (int start_pc)
{
  while (current_binding_level->start_pc > start_pc)
    {
      if (pedantic && current_binding_level->start_pc > start_pc)
	warning ("%JIn %D: overlapped variable and exception ranges at %d",
                 current_function_decl, current_function_decl,
		 current_binding_level->start_pc);
      poplevel (1, 0, 0);
    }
}

/* Insert BLOCK at the end of the list of subblocks of the
   current binding level.  This is used when a BIND_EXPR is expanded,
   to handle the BLOCK node inside the BIND_EXPR.  */

void
insert_block (tree block)
{
  TREE_USED (block) = 1;
  current_binding_level->blocks
    = chainon (current_binding_level->blocks, block);
}

/* integrate_decl_tree calls this function. */

void
java_dup_lang_specific_decl (tree node)
{
  int lang_decl_size;
  struct lang_decl *x;

  if (!DECL_LANG_SPECIFIC (node))
    return;

  lang_decl_size = sizeof (struct lang_decl);
  x = ggc_alloc (lang_decl_size);
  memcpy (x, DECL_LANG_SPECIFIC (node), lang_decl_size);
  DECL_LANG_SPECIFIC (node) = x;
}

void
give_name_to_locals (JCF *jcf)
{
  int i, n = DECL_LOCALVARIABLES_OFFSET (current_function_decl);
  int code_offset = DECL_CODE_OFFSET (current_function_decl);
  tree parm;
  pending_local_decls = NULL_TREE;
  if (n == 0)
    return;
  JCF_SEEK (jcf, n);
  n = JCF_readu2 (jcf);
  for (i = 0; i < n; i++)
    {
      int start_pc = JCF_readu2 (jcf);
      int length = JCF_readu2 (jcf);
      int name_index = JCF_readu2 (jcf);
      int signature_index = JCF_readu2 (jcf);
      int slot = JCF_readu2 (jcf);
      tree name = get_name_constant (jcf, name_index);
      tree type = parse_signature (jcf, signature_index);
      if (slot < DECL_ARG_SLOT_COUNT (current_function_decl)
	  && start_pc == 0
	  && length == DECL_CODE_LENGTH (current_function_decl))
	{
	  tree decl = TREE_VEC_ELT (decl_map, slot);
	  DECL_NAME (decl) = name;
	  SET_DECL_ASSEMBLER_NAME (decl, name);
	  if (TREE_CODE (decl) != PARM_DECL || TREE_TYPE (decl) != type)
	    warning ("bad type in parameter debug info");
	}
      else
	{
	  tree *ptr;
	  int end_pc = start_pc + length;
	  tree decl = build_decl (VAR_DECL, name, type);
	  if (end_pc > DECL_CODE_LENGTH (current_function_decl))
	    {
	      warning ("%Jbad PC range for debug info for local '%D'",
                       decl, decl);
	      end_pc = DECL_CODE_LENGTH (current_function_decl);
	    }

	  /* Adjust start_pc if necessary so that the local's first
	     store operation will use the relevant DECL as a
	     destination. Fore more information, read the leading
	     comments for expr.c:maybe_adjust_start_pc. */
	  start_pc = maybe_adjust_start_pc (jcf, code_offset, start_pc, slot);

	  MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (decl);
	  DECL_LOCAL_SLOT_NUMBER (decl) = slot;
	  DECL_LOCAL_START_PC (decl) = start_pc;
#if 0
	  /* FIXME: The range used internally for exceptions and local
	     variable ranges, is a half-open interval: 
	     start_pc <= pc < end_pc.  However, the range used in the
	     Java VM spec is inclusive at both ends: 
	     start_pc <= pc <= end_pc. */
	  end_pc++;
#endif
	  DECL_LOCAL_END_PC (decl) = end_pc;

	  /* Now insert the new decl in the proper place in
	     pending_local_decls.  We are essentially doing an insertion sort,
	     which works fine, since the list input will normally already
	     be sorted. */
	  ptr = &pending_local_decls;
	  while (*ptr != NULL_TREE
		 && (DECL_LOCAL_START_PC (*ptr) > start_pc
		     || (DECL_LOCAL_START_PC (*ptr) == start_pc
			 && DECL_LOCAL_END_PC (*ptr) < end_pc)))
	    ptr = &TREE_CHAIN (*ptr);
	  TREE_CHAIN (decl) = *ptr;
	  *ptr = decl;
	}
    }

  pending_local_decls = nreverse (pending_local_decls);

  /* Fill in default names for the parameters. */ 
  for (parm = DECL_ARGUMENTS (current_function_decl), i = 0;
       parm != NULL_TREE;  parm = TREE_CHAIN (parm), i++)
    {
      if (DECL_NAME (parm) == NULL_TREE)
	{
	  int arg_i = METHOD_STATIC (current_function_decl) ? i+1 : i;
	  if (arg_i == 0)
	    DECL_NAME (parm) = get_identifier ("this");
	  else
	    {
	      char buffer[12];
	      sprintf (buffer, "ARG_%d", arg_i);
	      DECL_NAME (parm) = get_identifier (buffer);
	    }
	  SET_DECL_ASSEMBLER_NAME (parm, DECL_NAME (parm));
	}
    }
}

tree
build_result_decl (tree fndecl)
{
  tree restype = TREE_TYPE (TREE_TYPE (fndecl));
  tree result = DECL_RESULT (fndecl);
  if (! result)
    {
      /* To be compatible with C_PROMOTING_INTEGER_TYPE_P in cc1/cc1plus. */
      if (INTEGRAL_TYPE_P (restype)
	  && TYPE_PRECISION (restype) < TYPE_PRECISION (integer_type_node))
	restype = integer_type_node;
      result = build_decl (RESULT_DECL, NULL_TREE, restype);
      DECL_ARTIFICIAL (result) = 1;
      DECL_IGNORED_P (result) = 1;
      DECL_CONTEXT (result) = fndecl;
      DECL_RESULT (fndecl) = result;
    }
  return result;
}

void
start_java_method (tree fndecl)
{
  tree tem, *ptr;
  int i;

  uniq = 0;

  current_function_decl = fndecl;
  announce_function (fndecl);

  i = DECL_MAX_LOCALS(fndecl) + DECL_MAX_STACK(fndecl);
  decl_map = make_tree_vec (i);
  base_decl_map = make_tree_vec (i);
  type_map = xrealloc (type_map, i * sizeof (tree));

#if defined(DEBUG_JAVA_BINDING_LEVELS)
  fprintf (stderr, "%s:\n", lang_printable_name (fndecl, 2));
  current_pc = 0;
#endif /* defined(DEBUG_JAVA_BINDING_LEVELS) */
  pushlevel (1);  /* Push parameters. */

  ptr = &DECL_ARGUMENTS (fndecl);
  for (tem = TYPE_ARG_TYPES (TREE_TYPE (fndecl)), i = 0;
       tem != end_params_node; tem = TREE_CHAIN (tem), i++)
    {
      tree parm_name = NULL_TREE, parm_decl;
      tree parm_type = TREE_VALUE (tem);
      if (i >= DECL_MAX_LOCALS (fndecl))
	abort ();

      parm_decl = build_decl (PARM_DECL, parm_name, parm_type);
      DECL_CONTEXT (parm_decl) = fndecl;
      if (targetm.calls.promote_prototypes (parm_type)
	  && TYPE_PRECISION (parm_type) < TYPE_PRECISION (integer_type_node)
	  && INTEGRAL_TYPE_P (parm_type))
	parm_type = integer_type_node;
      DECL_ARG_TYPE (parm_decl) = parm_type;

      *ptr = parm_decl;
      ptr = &TREE_CHAIN (parm_decl);

      /* Add parm_decl to the decl_map. */
      push_jvm_slot (i, parm_decl);

      type_map[i] = TREE_TYPE (parm_decl);
      if (TYPE_IS_WIDE (TREE_TYPE (parm_decl)))
	{
	  i++;
	  type_map[i] = void_type_node;
	}
    }
  *ptr = NULL_TREE;
  DECL_ARG_SLOT_COUNT (current_function_decl) = i;

  while (i < DECL_MAX_LOCALS(fndecl))
    type_map[i++] = NULL_TREE;

  build_result_decl (fndecl);

  /* Push local variables.  */
  pushlevel (2);

  function_binding_level = current_binding_level;
}

void
end_java_method (void)
{
  tree fndecl = current_function_decl;

  /* pop out of function */
  poplevel (1, 1, 0);

  /* pop out of its parameters */
  poplevel (1, 0, 1);

  BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
  
  if (DECL_SAVED_TREE (fndecl))
    {
      tree fbody, block_body;
      /* Before we check initialization, attached all class initialization
	 variable to the block_body */
      fbody = DECL_SAVED_TREE (fndecl);
      block_body = BIND_EXPR_BODY (fbody);
      htab_traverse (DECL_FUNCTION_INIT_TEST_TABLE (fndecl),
		     attach_init_test_initialization_flags, block_body);
    }

  flag_unit_at_a_time = 0;
  finish_method (fndecl);

  if (! flag_unit_at_a_time)
    {
      /* Nulling these fields when we no longer need them saves
	 memory.  */
      DECL_SAVED_TREE (fndecl) = NULL;
      DECL_STRUCT_FUNCTION (fndecl) = NULL;
      DECL_INITIAL (fndecl) = NULL_TREE;
    }
  current_function_decl = NULL_TREE;
}

/* Prepare a method for expansion.  */

void
finish_method (tree fndecl)
{
  tree *tp = &DECL_SAVED_TREE (fndecl);

  /* Wrap body of synchronized methods in a monitorenter,
     plus monitorexit cleanup.  */
  if (METHOD_SYNCHRONIZED (fndecl))
    {
      tree enter, exit, lock;
      if (METHOD_STATIC (fndecl))
	lock = build_class_ref (DECL_CONTEXT (fndecl));
      else
	lock = DECL_ARGUMENTS (fndecl);
      BUILD_MONITOR_ENTER (enter, lock);
      BUILD_MONITOR_EXIT (exit, lock);
      *tp = build2 (COMPOUND_EXPR, void_type_node, enter,
		    build2 (TRY_FINALLY_EXPR, void_type_node, *tp, exit));
    }

  /* Prepend class initialization for static methods reachable from
     other classes.  */
  if (METHOD_STATIC (fndecl) && ! METHOD_PRIVATE (fndecl)
      && ! DECL_CLINIT_P (fndecl)
      && ! CLASS_INTERFACE (TYPE_NAME (DECL_CONTEXT (fndecl))))
    {
      tree clas = DECL_CONTEXT (fndecl);
      tree init = build3 (CALL_EXPR, void_type_node,
			  build_address_of (soft_initclass_node),
			  build_tree_list (NULL_TREE, build_class_ref (clas)),
			  NULL_TREE);
      *tp = build2 (COMPOUND_EXPR, TREE_TYPE (*tp), init, *tp);
    }

  /* Convert function tree to GENERIC prior to inlining.  */
  java_genericize (fndecl);

  /* Store the end of the function, so that we get good line number
     info for the epilogue.  */
  if (DECL_STRUCT_FUNCTION (fndecl))
    cfun = DECL_STRUCT_FUNCTION (fndecl);
  else
    allocate_struct_function (fndecl);
#ifdef USE_MAPPED_LOCATION
  cfun->function_end_locus = DECL_FUNCTION_LAST_LINE (fndecl);
#else
  cfun->function_end_locus.file = DECL_SOURCE_FILE (fndecl);
  cfun->function_end_locus.line = DECL_FUNCTION_LAST_LINE (fndecl);
#endif

  /* Defer inlining and expansion to the cgraph optimizers.  */
  cgraph_finalize_function (fndecl, false);
}

/* Optimize and expand a function's entire body.  */

void
java_expand_body (tree fndecl)
{
  tree_rest_of_compilation (fndecl);
}

/* We pessimistically marked all methods and fields external until we
   knew what set of classes we were planning to compile.  Now mark those
   associated with CLASS to be generated locally as not external.  */

static void
java_mark_decl_local (tree decl)
{
  DECL_EXTERNAL (decl) = 0;

  /* If we've already constructed DECL_RTL, give encode_section_info
     a second chance, now that we've changed the flags.  */
  if (DECL_RTL_SET_P (decl))
    make_decl_rtl (decl);
}

void
java_mark_class_local (tree class)
{
  tree t;

  for (t = TYPE_FIELDS (class); t ; t = TREE_CHAIN (t))
    if (FIELD_STATIC (t))
      java_mark_decl_local (t);

  for (t = TYPE_METHODS (class); t ; t = TREE_CHAIN (t))
    if (!METHOD_ABSTRACT (t) && (!METHOD_NATIVE (t) || flag_jni))
      java_mark_decl_local (t);
}

/* Add a statement to a compound_expr.  */

tree
add_stmt_to_compound (tree existing, tree type, tree stmt)
{
  if (!stmt)
    return existing;
  else if (existing)
    {
      tree expr = build2 (COMPOUND_EXPR, type, existing, stmt);
      TREE_SIDE_EFFECTS (expr) = TREE_SIDE_EFFECTS (existing)
				 | TREE_SIDE_EFFECTS (stmt);
      return expr;
    }
  else
    return stmt;
}

/* Add a statement to the compound_expr currently being
   constructed.  */

tree
java_add_stmt (tree stmt)
{
  if (input_filename)
    SET_EXPR_LOCATION (stmt, input_location);
  
  return current_binding_level->stmts 
    = add_stmt_to_compound (current_binding_level->stmts, 
			    TREE_TYPE (stmt), stmt);
}

/* Add a variable to the current scope.  */

tree
java_add_local_var (tree decl)
{
  tree *vars = &current_binding_level->names;
  tree next = *vars;
  TREE_CHAIN (decl) = next;
  *vars = decl;
  DECL_CONTEXT (decl) = current_function_decl;
  MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (decl);
  return decl;
}

/* Return a pointer to the compound_expr currently being
   constructed.  */

tree *
get_stmts (void)
{
  return &current_binding_level->stmts;
}

/* Register an exception range as belonging to the current binding
   level.  There may only be one: if there are more, we'll create more
   binding levels.  However, each range can have multiple handlers,
   and these are expanded when we call expand_end_java_handler().  */

void
register_exception_range (struct eh_range *range, int pc, int end_pc)
{
  if (current_binding_level->exception_range)
    abort ();
  current_binding_level->exception_range = range;
  current_binding_level->end_pc = end_pc;
  current_binding_level->start_pc = pc;      
}

#include "gt-java-decl.h"