aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.9/gcc/toplev.c
blob: 21e07bc8e9b211cd6b9456865f61359eeaab3fda (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
/* Top level of GCC compilers (cc1, cc1plus, etc.)
   Copyright (C) 1987-2014 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

/* This is the top level of cc1/c++.
   It parses command args, opens files, invokes the various passes
   in the proper order, and counts the time used by each.
   Error messages and low-level interface to malloc also handled here.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "line-map.h"
#include "input.h"
#include "tree.h"
#include "varasm.h"
#include "tree-inline.h"
#include "realmpfr.h"	/* For GMP/MPFR/MPC versions, in print_version.  */
#include "version.h"
#include "rtl.h"
#include "tm_p.h"
#include "flags.h"
#include "insn-attr.h"
#include "insn-config.h"
#include "insn-flags.h"
#include "hard-reg-set.h"
#include "recog.h"
#include "output.h"
#include "except.h"
#include "function.h"
#include "toplev.h"
#include "expr.h"
#include "intl.h"
#include "regs.h"
#include "timevar.h"
#include "diagnostic.h"
#include "tree-diagnostic.h"
#include "tree-pretty-print.h"
#include "params.h"
#include "reload.h"
#include "ira.h"
#include "dwarf2asm.h"
#include "debug.h"
#include "target.h"
#include "common/common-target.h"
#include "langhooks.h"
#include "cfgloop.h" /* for init_set_costs */
#include "hosthooks.h"
#include "cgraph.h"
#include "opts.h"
#include "opts-diagnostic.h"
#include "coverage.h"
#include "value-prof.h"
#include "alloc-pool.h"
#include "asan.h"
#include "tsan.h"
#include "tree-ssa-alias.h"
#include "internal-fn.h"
#include "gimple-expr.h"
#include "gimple.h"
#include "plugin.h"
#include "diagnostic-color.h"
#include "context.h"
#include "pass_manager.h"
#include "optabs.h"
#include "auto-profile.h"

#if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
#include "dbxout.h"
#endif

#ifdef SDB_DEBUGGING_INFO
#include "sdbout.h"
#endif

#ifdef XCOFF_DEBUGGING_INFO
#include "xcoffout.h"		/* Needed for external data
				   declarations for e.g. AIX 4.x.  */
#endif

static void general_init (const char *);
static void do_compile (void);
static void process_options (void);
static void backend_init (void);
static int lang_dependent_init (const char *);
static void init_asm_output (const char *);
static void finalize (bool);

static void crash_signal (int) ATTRIBUTE_NORETURN;
static void compile_file (void);

/* True if we don't need a backend (e.g. preprocessing only).  */
static bool no_backend;

/* Length of line when printing switch values.  */
#define MAX_LINE 75

/* Decoded options, and number of such options.  */
struct cl_decoded_option *save_decoded_options;
unsigned int save_decoded_options_count;

/* Used to enable -fvar-tracking, -fweb and -frename-registers according
   to optimize in process_options ().  */
#define AUTODETECT_VALUE 2

/* Debug hooks - dependent upon command line options.  */

const struct gcc_debug_hooks *debug_hooks;

/* The FUNCTION_DECL for the function currently being compiled,
   or 0 if between functions.  */
tree current_function_decl;

/* Set to the FUNC_BEGIN label of the current function, or NULL
   if none.  */
const char * current_function_func_begin_label;

/* A random sequence of characters, unless overridden by user.  */
static const char *flag_random_seed;

/* A local time stamp derived from the time of compilation. It will be
   zero if the system cannot provide a time.  It will be -1u, if the
   user has specified a particular random seed.  */
unsigned local_tick;

/* Random number for this compilation */
HOST_WIDE_INT random_seed;

/* -f flags.  */

/* When non-NULL, indicates that whenever space is allocated on the
   stack, the resulting stack pointer must not pass this
   address---that is, for stacks that grow downward, the stack pointer
   must always be greater than or equal to this address; for stacks
   that grow upward, the stack pointer must be less than this address.
   At present, the rtx may be either a REG or a SYMBOL_REF, although
   the support provided depends on the backend.  */
rtx stack_limit_rtx;

struct target_flag_state default_target_flag_state;
#if SWITCHABLE_TARGET
struct target_flag_state *this_target_flag_state = &default_target_flag_state;
#else
#define this_target_flag_state (&default_target_flag_state)
#endif

/* The user symbol prefix after having resolved same.  */
const char *user_label_prefix;

/* Output files for assembler code (real compiler output)
   and debugging dumps.  */

FILE *asm_out_file;
FILE *aux_info_file;
FILE *stack_usage_file = NULL;

/* The current working directory of a translation.  It's generally the
   directory from which compilation was initiated, but a preprocessed
   file may specify the original directory in which it was
   created.  */

static const char *src_pwd;

/* Primary module's id (non-zero). If no module-info was read in, this will
   be zero.  */

unsigned primary_module_id = 0;

/* Current module id.  */

unsigned current_module_id = 0;

/* Include all auxiliary modules specified in the profile. This
   will bypass the ggc_memory limit check.  */
bool include_all_aux = 0;

/* Initialize src_pwd with the given string, and return true.  If it
   was already initialized, return false.  As a special case, it may
   be called with a NULL argument to test whether src_pwd has NOT been
   initialized yet.  */

bool
set_src_pwd (const char *pwd)
{
  if (src_pwd)
    {
      if (strcmp (src_pwd, pwd) == 0)
	return true;
      else
	return false;
    }

  src_pwd = xstrdup (pwd);
  return true;
}

/* Return the directory from which the translation unit was initiated,
   in case set_src_pwd() was not called before to assign it a
   different value.  */

const char *
get_src_pwd (void)
{
  if (! src_pwd)
    {
      src_pwd = getpwd ();
      if (!src_pwd)
	src_pwd = ".";
    }

   return src_pwd;
}

/* Called when the start of a function definition is parsed,
   this function prints on stderr the name of the function.  */
void
announce_function (tree decl)
{
  if (!quiet_flag)
    {
      if (rtl_dump_and_exit)
	fprintf (stderr, "%s ",
		 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
      else
	fprintf (stderr, " %s",
		 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
      fflush (stderr);
      pp_needs_newline (global_dc->printer) = true;
      diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
    }
}

/* Initialize local_tick with a random number or -1 if
   flag_random_seed is set.  */

static void
init_local_tick (void)
{
  if (!flag_random_seed)
    {
      /* Try urandom first. Time of day is too likely to collide. 
	 In case of any error we just use the local tick. */

      int fd = open ("/dev/urandom", O_RDONLY);
      if (fd >= 0)
        {
          read (fd, &random_seed, sizeof (random_seed));
          close (fd);
        }

      /* Now get the tick anyways  */
#ifdef HAVE_GETTIMEOFDAY
      {
	struct timeval tv;

	gettimeofday (&tv, NULL);
	local_tick = (unsigned) tv.tv_sec * 1000 + tv.tv_usec / 1000;
      }
#else
      {
	time_t now = time (NULL);

	if (now != (time_t)-1)
	  local_tick = (unsigned) now;
      }
#endif
    }
  else
    local_tick = -1;
}

/* Set up a default flag_random_seed and local_tick, unless the user
   already specified one.  Must be called after init_local_tick.  */

static void
init_random_seed (void)
{
  if (flag_random_seed)
    {
      char *endp;

      /* When the driver passed in a hex number don't crc it again */
      random_seed = strtoul (flag_random_seed, &endp, 0);
      if (!(endp > flag_random_seed && *endp == 0))
        random_seed = crc32_string (0, flag_random_seed);
    }
  else if (!random_seed)
    random_seed = local_tick ^ getpid ();  /* Old racey fallback method */
}

/* Obtain the random_seed.  Unless NOINIT, initialize it if
   it's not provided in the command line.  */

HOST_WIDE_INT
get_random_seed (bool noinit)
{
  if (!flag_random_seed && !noinit)
    init_random_seed ();
  return random_seed;
}

/* Modify the random_seed string to VAL.  Return its previous
   value.  */

const char *
set_random_seed (const char *val)
{
  const char *old = flag_random_seed;
  flag_random_seed = val;
  return old;
}

/* Handler for fatal signals, such as SIGSEGV.  These are transformed
   into ICE messages, which is much more user friendly.  In case the
   error printer crashes, reset the signal to prevent infinite recursion.  */

static void
crash_signal (int signo)
{
  signal (signo, SIG_DFL);

  /* If we crashed while processing an ASM statement, then be a little more
     graceful.  It's most likely the user's fault.  */
  if (this_is_asm_operands)
    {
      output_operand_lossage ("unrecoverable error");
      exit (FATAL_EXIT_CODE);
    }

  internal_error ("%s", strsignal (signo));
}

/* A subroutine of wrapup_global_declarations.  We've come to the end of
   the compilation unit.  All deferred variables should be undeferred,
   and all incomplete decls should be finalized.  */

void
wrapup_global_declaration_1 (tree decl)
{
  /* We're not deferring this any longer.  Assignment is conditional to
     avoid needlessly dirtying PCH pages.  */
  if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
      && DECL_DEFER_OUTPUT (decl) != 0)
    DECL_DEFER_OUTPUT (decl) = 0;

  if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
    lang_hooks.finish_incomplete_decl (decl);
}

/* A subroutine of wrapup_global_declarations.  Decide whether or not DECL
   needs to be output.  Return true if it is output.  */

bool
wrapup_global_declaration_2 (tree decl)
{
  if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl)
      || (TREE_CODE (decl) == VAR_DECL && DECL_HAS_VALUE_EXPR_P (decl)))
    return false;

  /* Don't write out static consts, unless we still need them.

     We also keep static consts if not optimizing (for debugging),
     unless the user specified -fno-keep-static-consts.
     ??? They might be better written into the debug information.
     This is possible when using DWARF.

     A language processor that wants static constants to be always
     written out (even if it is not used) is responsible for
     calling rest_of_decl_compilation itself.  E.g. the C front-end
     calls rest_of_decl_compilation from finish_decl.
     One motivation for this is that is conventional in some
     environments to write things like:
     static const char rcsid[] = "... version string ...";
     intending to force the string to be in the executable.

     A language processor that would prefer to have unneeded
     static constants "optimized away" would just defer writing
     them out until here.  E.g. C++ does this, because static
     constants are often defined in header files.

     ??? A tempting alternative (for both C and C++) would be
     to force a constant to be written if and only if it is
     defined in a main file, as opposed to an include file.  */

  if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
    {
      varpool_node *node;
      bool needed = true;
      node = varpool_get_node (decl);

      if (!node && flag_ltrans)
	needed = false;
      else if (node && node->definition)
	needed = false;
      else if (node && node->alias)
	needed = false;
      else if (!cgraph_global_info_ready
	       && (TREE_USED (decl)
		   || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
	/* needed */;
      else if (node && node->analyzed)
	/* needed */;
      else if (DECL_COMDAT (decl))
	needed = false;
      else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
	       && (optimize || !flag_keep_static_consts
		   || DECL_ARTIFICIAL (decl)))
	needed = false;

      if (needed)
	{
	  rest_of_decl_compilation (decl, 1, 1);
	  return true;
	}
    }

  return false;
}

/* Do any final processing required for the declarations in VEC, of
   which there are LEN.  We write out inline functions and variables
   that have been deferred until this point, but which are required.
   Returns nonzero if anything was put out.  */

bool
wrapup_global_declarations (tree *vec, int len)
{
  bool reconsider, output_something = false;
  int i;

  for (i = 0; i < len; i++)
    wrapup_global_declaration_1 (vec[i]);

  /* Now emit any global variables or functions that we have been
     putting off.  We need to loop in case one of the things emitted
     here references another one which comes earlier in the list.  */
  do
    {
      reconsider = false;
      for (i = 0; i < len; i++)
	reconsider |= wrapup_global_declaration_2 (vec[i]);
      if (reconsider)
	output_something = true;
    }
  while (reconsider);

  return output_something;
}

/* A subroutine of check_global_declarations.  Issue appropriate warnings
   for the global declaration DECL.  */

void
check_global_declaration_1 (tree decl)
{
  /* Warn about any function declared static but not defined.  We don't
     warn about variables, because many programs have static variables
     that exist only to get some text into the object file.  */
  if (TREE_CODE (decl) == FUNCTION_DECL
      && DECL_INITIAL (decl) == 0
      && DECL_EXTERNAL (decl)
      && ! DECL_ARTIFICIAL (decl)
      && ! TREE_NO_WARNING (decl)
      && ! TREE_PUBLIC (decl)
      && (warn_unused_function
	  || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
    {
      if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
	pedwarn (input_location, 0, "%q+F used but never defined", decl);
      else
	warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
      /* This symbol is effectively an "extern" declaration now.  */
      TREE_PUBLIC (decl) = 1;
    }

  /* Warn about static fns or vars defined but not used.  */
  if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
       /* We don't warn about "static const" variables because the
	  "rcs_id" idiom uses that construction.  */
       || (warn_unused_variable
	   && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
      && ! DECL_IN_SYSTEM_HEADER (decl)
      && ! TREE_USED (decl)
      /* The TREE_USED bit for file-scope decls is kept in the identifier,
	 to handle multiple external decls in different scopes.  */
      && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
      && ! DECL_EXTERNAL (decl)
      && ! TREE_PUBLIC (decl)
      /* A volatile variable might be used in some non-obvious way.  */
      && ! TREE_THIS_VOLATILE (decl)
      /* Global register variables must be declared to reserve them.  */
      && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
      /* Otherwise, ask the language.  */
      && lang_hooks.decls.warn_unused_global (decl))
    warning ((TREE_CODE (decl) == FUNCTION_DECL)
	     ? OPT_Wunused_function
             : OPT_Wunused_variable,
	     "%q+D defined but not used", decl);
}

/* Issue appropriate warnings for the global declarations in V (of
   which there are LEN).  */

void
check_global_declarations (tree *v, int len)
{
  int i;

  for (i = 0; i < len; i++)
    check_global_declaration_1 (v[i]);
}

/* Emit debugging information for all global declarations in VEC.  */

void
emit_debug_global_declarations (tree *vec, int len)
{
  int i;

  /* Avoid confusing the debug information machinery when there are errors.  */
  if (seen_error ())
    return;

  timevar_push (TV_SYMOUT);
  for (i = 0; i < len; i++)
    debug_hooks->global_decl (vec[i]);
  timevar_pop (TV_SYMOUT);
}

/* Compile an entire translation unit.  Write a file of assembly
   output and various debugging dumps.  */

static void
compile_file (void)
{
  timevar_start (TV_PHASE_PARSING);
  timevar_push (TV_PARSE_GLOBAL);

  /* Call the parser, which parses the entire file (calling
     rest_of_compilation for each function).  */
  lang_hooks.parse_file ();

  timevar_pop (TV_PARSE_GLOBAL);
  timevar_stop (TV_PHASE_PARSING);

  /* Compilation is now finished except for writing
     what's left of the symbol table output.  */

  if (flag_syntax_only || flag_wpa)
    return;

  ggc_protect_identifiers = false;

  /* This must also call finalize_compilation_unit.  */
  lang_hooks.decls.final_write_globals ();

  if (seen_error ())
    return;

  if (flag_dyn_ipa)
    coverage_finish ();

  timevar_start (TV_PHASE_LATE_ASM);

  /* Compilation unit is finalized.  When producing non-fat LTO object, we are
     basically finished.  */
  if (in_lto_p || !flag_lto || flag_fat_lto_objects)
    {
      /* File-scope initialization for AddressSanitizer.  */
      if (flag_sanitize & SANITIZE_ADDRESS)
        asan_finish_file ();

      if (flag_sanitize & SANITIZE_THREAD)
	tsan_finish_file ();

      output_shared_constant_pool ();
      output_object_blocks ();
      finish_tm_clone_pairs ();

      /* Write out any pending weak symbol declarations.  */
      weak_finish ();

      /* This must be at the end before unwind and debug info.
	 Some target ports emit PIC setup thunks here.  */
      targetm.asm_out.code_end ();

      /* Do dbx symbols.  */
      timevar_push (TV_SYMOUT);

    #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
      if (dwarf2out_do_frame ())
	dwarf2out_frame_finish ();
    #endif

      (*debug_hooks->finish) (main_input_filename);
      timevar_pop (TV_SYMOUT);

      /* Output some stuff at end of file if nec.  */

      dw2_output_indirect_constants ();

      /* Flush any pending external directives.  */
      process_pending_assemble_externals ();
   }

  /* Emit LTO marker if LTO info has been previously emitted.  This is
     used by collect2 to determine whether an object file contains IL.
     We used to emit an undefined reference here, but this produces
     link errors if an object file with IL is stored into a shared
     library without invoking lto1.  */
  if (flag_generate_lto)
    {
#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
      ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
				      "__gnu_lto_v1",
				      (unsigned HOST_WIDE_INT) 1, 8);
#elif defined ASM_OUTPUT_ALIGNED_COMMON
      ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
				 (unsigned HOST_WIDE_INT) 1, 8);
#else
      ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
			 (unsigned HOST_WIDE_INT) 1,
			 (unsigned HOST_WIDE_INT) 1);
#endif
      /* Let linker plugin know that this is a slim object and must be LTOed
         even when user did not ask for it.  */
      if (!flag_fat_lto_objects)
        {
#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
	  ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
					  "__gnu_lto_slim",
					  (unsigned HOST_WIDE_INT) 1, 8);
#elif defined ASM_OUTPUT_ALIGNED_COMMON
	  ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_slim",
				     (unsigned HOST_WIDE_INT) 1, 8);
#else
	  ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_slim",
			     (unsigned HOST_WIDE_INT) 1,
			     (unsigned HOST_WIDE_INT) 1);
#endif
        }
    }

  /* Attach a special .ident directive to the end of the file to identify
     the version of GCC which compiled this code.  The format of the .ident
     string is patterned after the ones produced by native SVR4 compilers.  */
  if (!flag_no_ident)
    {
      const char *pkg_version = "(GNU) ";
      char *ident_str;

      if (strcmp ("(GCC) ", pkgversion_string))
	pkg_version = pkgversion_string;

      ident_str = ACONCAT (("GCC: ", pkg_version, version_string, NULL));
      targetm.asm_out.output_ident (ident_str);
    }

  /* Auto profile finalization. */
  if (flag_auto_profile)
    end_auto_profile ();

  /* Invoke registered plugin callbacks.  */
  invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);

  /* This must be at the end.  Some target ports emit end of file directives
     into the assembly file here, and hence we can not output anything to the
     assembly file after this point.  */
  targetm.asm_out.file_end ();

  timevar_stop (TV_PHASE_LATE_ASM);
}

/* Print version information to FILE.
   Each line begins with INDENT (for the case where FILE is the
   assembler output file).  */

void
print_version (FILE *file, const char *indent)
{
  static const char fmt1[] =
#ifdef __GNUC__
    N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
#else
    N_("%s%s%s %sversion %s (%s) compiled by CC, ")
#endif
    ;
  static const char fmt2[] =
    N_("GMP version %s, MPFR version %s, MPC version %s\n");
  static const char fmt3[] =
    N_("%s%swarning: %s header version %s differs from library version %s.\n");
  static const char fmt4[] =
    N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
#ifndef __VERSION__
#define __VERSION__ "[?]"
#endif
  fprintf (file,
	   file == stderr ? _(fmt1) : fmt1,
	   indent, *indent != 0 ? " " : "",
	   lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
	   indent, __VERSION__);

  /* We need to stringify the GMP macro values.  Ugh, gmp_version has
     two string formats, "i.j.k" and "i.j" when k is zero.  As of
     gmp-4.3.0, GMP always uses the 3 number format.  */
#define GCC_GMP_STRINGIFY_VERSION3(X) #X
#define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
#define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
#define GCC_GMP_VERSION \
  GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
#if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
#define GCC_GMP_STRINGIFY_VERSION \
  GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
  GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
#else
#define GCC_GMP_STRINGIFY_VERSION \
  GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
  GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
  GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
#endif
  fprintf (file,
	   file == stderr ? _(fmt2) : fmt2,
	   GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
  if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
    fprintf (file,
	     file == stderr ? _(fmt3) : fmt3,
	     indent, *indent != 0 ? " " : "",
	     "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
  if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
    fprintf (file,
	     file == stderr ? _(fmt3) : fmt3,
	     indent, *indent != 0 ? " " : "",
	     "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
  if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
    fprintf (file,
	     file == stderr ? _(fmt3) : fmt3,
	     indent, *indent != 0 ? " " : "",
	     "MPC", MPC_VERSION_STRING, mpc_get_version ());
  fprintf (file,
	   file == stderr ? _(fmt4) : fmt4,
	   indent, *indent != 0 ? " " : "",
	   PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));

  print_plugins_versions (file, indent);
}

static int
print_to_asm_out_file (print_switch_type type, const char * text)
{
  bool prepend_sep = true;

  switch (type)
    {
    case SWITCH_TYPE_LINE_END:
      putc ('\n', asm_out_file);
      return 1;

    case SWITCH_TYPE_LINE_START:
      fputs (ASM_COMMENT_START, asm_out_file);
      return strlen (ASM_COMMENT_START);

    case SWITCH_TYPE_DESCRIPTIVE:
      if (ASM_COMMENT_START[0] == 0)
	prepend_sep = false;
      /* Drop through.  */
    case SWITCH_TYPE_PASSED:
    case SWITCH_TYPE_ENABLED:
      if (prepend_sep)
	fputc (' ', asm_out_file);
      fputs (text, asm_out_file);
      /* No need to return the length here as
	 print_single_switch has already done it.  */
      return 0;

    default:
      return -1;
    }
}

static int
print_to_stderr (print_switch_type type, const char * text)
{
  switch (type)
    {
    case SWITCH_TYPE_LINE_END:
      putc ('\n', stderr);
      return 1;

    case SWITCH_TYPE_LINE_START:
      return 0;

    case SWITCH_TYPE_PASSED:
    case SWITCH_TYPE_ENABLED:
      fputc (' ', stderr);
      /* Drop through.  */

    case SWITCH_TYPE_DESCRIPTIVE:
      fputs (text, stderr);
      /* No need to return the length here as
	 print_single_switch has already done it.  */
      return 0;

    default:
      return -1;
    }
}

/* Print an option value and return the adjusted position in the line.
   ??? print_fn doesn't handle errors, eg disk full; presumably other
   code will catch a disk full though.  */

static int
print_single_switch (print_switch_fn_type print_fn,
		     int pos,
		     print_switch_type type,
		     const char * text)
{
  /* The ultrix fprintf returns 0 on success, so compute the result
     we want here since we need it for the following test.  The +1
     is for the separator character that will probably be emitted.  */
  int len = strlen (text) + 1;

  if (pos != 0
      && pos + len > MAX_LINE)
    {
      print_fn (SWITCH_TYPE_LINE_END, NULL);
      pos = 0;
    }

  if (pos == 0)
    pos += print_fn (SWITCH_TYPE_LINE_START, NULL);

  print_fn (type, text);
  return pos + len;
}

/* Print active target switches using PRINT_FN.
   POS is the current cursor position and MAX is the size of a "line".
   Each line begins with INDENT and ends with TERM.
   Each switch is separated from the next by SEP.  */

static void
print_switch_values (print_switch_fn_type print_fn)
{
  int pos = 0;
  size_t j;

  /* Fill in the -frandom-seed option, if the user didn't pass it, so
     that it can be printed below.  This helps reproducibility.  */
  if (!flag_random_seed)
    init_random_seed ();

  /* Print the options as passed.  */
  pos = print_single_switch (print_fn, pos,
			     SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));

  for (j = 1; j < save_decoded_options_count; j++)
    {
      switch (save_decoded_options[j].opt_index)
	{
	case OPT_o:
	case OPT_d:
	case OPT_dumpbase:
	case OPT_dumpdir:
	case OPT_auxbase:
	case OPT_quiet:
	case OPT_version:
	  /* Ignore these.  */
	  continue;
	}

      pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED,
				 save_decoded_options[j].orig_option_with_args_text);
    }

  if (pos > 0)
    print_fn (SWITCH_TYPE_LINE_END, NULL);

  /* Print the -f and -m options that have been enabled.
     We don't handle language specific options but printing argv
     should suffice.  */
  pos = print_single_switch (print_fn, 0,
			     SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));

  for (j = 0; j < cl_options_count; j++)
    if (cl_options[j].cl_report
	&& option_enabled (j, &global_options) > 0)
      pos = print_single_switch (print_fn, pos,
				 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);

  print_fn (SWITCH_TYPE_LINE_END, NULL);
}

/* Open assembly code output file.  Do this even if -fsyntax-only is
   on, because then the driver will have provided the name of a
   temporary file or bit bucket for us.  NAME is the file specified on
   the command line, possibly NULL.  */
static void
init_asm_output (const char *name)
{
  if (name == NULL && asm_file_name == 0)
    asm_out_file = stdout;
  else
    {
      if (asm_file_name == 0)
	{
	  int len = strlen (dump_base_name);
	  char *dumpname = XNEWVEC (char, len + 6);

	  memcpy (dumpname, dump_base_name, len + 1);
	  strip_off_ending (dumpname, len);
	  strcat (dumpname, ".s");
	  asm_file_name = dumpname;
	}
      if (!strcmp (asm_file_name, "-"))
	asm_out_file = stdout;
      else
	asm_out_file = fopen (asm_file_name, "w");
      if (asm_out_file == 0)
	fatal_error ("can%'t open %s for writing: %m", asm_file_name);
    }

  if (!flag_syntax_only)
    {
      targetm.asm_out.file_start ();

      if (flag_record_gcc_switches)
	{
	  if (targetm.asm_out.record_gcc_switches)
	    {
	      /* Let the target know that we are about to start recording.  */
	      targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
						   NULL);
	      /* Now record the switches.  */
	      print_switch_values (targetm.asm_out.record_gcc_switches);
	      /* Let the target know that the recording is over.  */
	      targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
						   NULL);
	    }
	  else
	    inform (input_location, "-frecord-gcc-switches is not supported by the current target");
	}

      if (flag_verbose_asm)
	{
	  /* Print the list of switches in effect
	     into the assembler file as comments.  */
	  print_version (asm_out_file, ASM_COMMENT_START);
	  print_switch_values (print_to_asm_out_file);
	  putc ('\n', asm_out_file);
	}
    }
}

/* A helper function; used as the reallocator function for cpp's line
   table.  */
static void *
realloc_for_line_map (void *ptr, size_t len)
{
  return GGC_RESIZEVAR (void, ptr, len);
}

/* A helper function: used as the allocator function for
   identifier_to_locale.  */
static void *
alloc_for_identifier_to_locale (size_t len)
{
  return ggc_alloc_atomic (len);
}

/* Output stack usage information.  */
void
output_stack_usage (void)
{
  static bool warning_issued = false;
  enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED };
  const char *stack_usage_kind_str[] = {
    "static",
    "dynamic",
    "dynamic,bounded"
  };
  HOST_WIDE_INT stack_usage = current_function_static_stack_size;
  enum stack_usage_kind_type stack_usage_kind;

  if (stack_usage < 0)
    {
      if (!warning_issued)
	{
	  warning (0, "stack usage computation not supported for this target");
	  warning_issued = true;
	}
      return;
    }

  stack_usage_kind = STATIC;

  /* Add the maximum amount of space pushed onto the stack.  */
  if (current_function_pushed_stack_size > 0)
    {
      stack_usage += current_function_pushed_stack_size;
      stack_usage_kind = DYNAMIC_BOUNDED;
    }

  /* Now on to the tricky part: dynamic stack allocation.  */
  if (current_function_allocates_dynamic_stack_space)
    {
      if (current_function_has_unbounded_dynamic_stack_size)
	stack_usage_kind = DYNAMIC;
      else
	stack_usage_kind = DYNAMIC_BOUNDED;

      /* Add the size even in the unbounded case, this can't hurt.  */
      stack_usage += current_function_dynamic_stack_size;
    }

  if (flag_stack_usage)
    {
      expanded_location loc
	= expand_location (DECL_SOURCE_LOCATION (current_function_decl));
      /* We don't want to print the full qualified name because it can be long,
	 so we strip the scope prefix, but we may need to deal with the suffix
	 created by the compiler.  */
      const char *suffix
	= strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), '.');
      const char *name
	= lang_hooks.decl_printable_name (current_function_decl, 2);
      if (suffix)
	{
	  const char *dot = strchr (name, '.');
	  while (dot && strcasecmp (dot, suffix) != 0)
	    {
	      name = dot + 1;
	      dot = strchr (name, '.');
	    }
	}
      else
	{
	  const char *dot = strrchr (name, '.');
	  if (dot)
	    name = dot + 1;
	}

      fprintf (stack_usage_file,
	       "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC"\t%s\n",
	       lbasename (loc.file),
	       loc.line,
	       loc.column,
	       name,
	       stack_usage,
	       stack_usage_kind_str[stack_usage_kind]);
    }

  if (warn_stack_usage >= 0)
    {
      const location_t loc = DECL_SOURCE_LOCATION (current_function_decl);

      if (stack_usage_kind == DYNAMIC)
	warning_at (loc, OPT_Wstack_usage_, "stack usage might be unbounded");
      else if (stack_usage > warn_stack_usage)
	{
	  if (stack_usage_kind == DYNAMIC_BOUNDED)
	    warning_at (loc,
			OPT_Wstack_usage_, "stack usage might be %wd bytes",
			stack_usage);
	  else
	    warning_at (loc, OPT_Wstack_usage_, "stack usage is %wd bytes",
			stack_usage);
	}
    }
}

/* Open an auxiliary output file.  */
static FILE *
open_auxiliary_file (const char *ext)
{
  char *filename;
  FILE *file;

  filename = concat (aux_base_name, ".", ext, NULL);
  file = fopen (filename, "w");
  if (!file)
    fatal_error ("can%'t open %s for writing: %m", filename);
  free (filename);
  return file;
}

/* Initialization of the front end environment, before command line
   options are parsed.  Signal handlers, internationalization etc.
   ARGV0 is main's argv[0].  */
static void
general_init (const char *argv0)
{
  const char *p;

  p = argv0 + strlen (argv0);
  while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
    --p;
  progname = p;

  xmalloc_set_program_name (progname);

  hex_init ();

  /* Unlock the stdio streams.  */
  unlock_std_streams ();

  gcc_init_libintl ();

  identifier_to_locale_alloc = alloc_for_identifier_to_locale;
  identifier_to_locale_free = ggc_free;

  /* Initialize the diagnostics reporting machinery, so option parsing
     can give warnings and errors.  */
  diagnostic_initialize (global_dc, N_OPTS);
  /* Set a default printer.  Language specific initializations will
     override it later.  */
  tree_diagnostics_defaults (global_dc);
  /* FIXME: This should probably be moved to C-family
     language-specific initializations.  */
  /* By default print macro expansion contexts in the diagnostic
     finalizer -- for tokens resulting from macro expansion.  */
  diagnostic_finalizer (global_dc) = virt_loc_aware_diagnostic_finalizer;

  global_dc->show_caret
    = global_options_init.x_flag_diagnostics_show_caret;
  global_dc->show_option_requested
    = global_options_init.x_flag_diagnostics_show_option;
  global_dc->show_column
    = global_options_init.x_flag_show_column;
  global_dc->internal_error = plugins_internal_error_function;
  global_dc->option_enabled = option_enabled;
  global_dc->option_state = &global_options;
  global_dc->option_name = option_name;

  /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages.  */
#ifdef SIGSEGV
  signal (SIGSEGV, crash_signal);
#endif
#ifdef SIGILL
  signal (SIGILL, crash_signal);
#endif
#ifdef SIGBUS
  signal (SIGBUS, crash_signal);
#endif
#ifdef SIGABRT
  signal (SIGABRT, crash_signal);
#endif
#if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
  signal (SIGIOT, crash_signal);
#endif
#ifdef SIGFPE
  signal (SIGFPE, crash_signal);
#endif

  /* Other host-specific signal setup.  */
  (*host_hooks.extra_signals)();

  /* Initialize the garbage-collector, string pools and tree type hash
     table.  */
  init_ggc ();
  init_stringpool ();
  line_table = ggc_alloc_line_maps ();
  linemap_init (line_table);
  line_table->reallocator = realloc_for_line_map;
  line_table->round_alloc_size = ggc_round_alloc_size;
  init_ttree ();

  /* Initialize register usage now so switches may override.  */
  init_reg_sets ();

  /* Register the language-independent parameters.  */
  global_init_params ();

  /* This must be done after global_init_params but before argument
     processing.  */
  init_ggc_heuristics ();

  /* Create the singleton holder for global state.
     Doing so also creates the pass manager and with it the passes.  */
  g = new gcc::context ();

  statistics_early_init ();
  finish_params ();
}

/* Return true if the current target supports -fsection-anchors.  */

static bool
target_supports_section_anchors_p (void)
{
  if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
    return false;

  if (targetm.asm_out.output_anchor == NULL)
    return false;

  return true;
}

/* Default the align_* variables to 1 if they're still unset, and
   set up the align_*_log variables.  */
static void
init_alignments (void)
{
  if (align_loops <= 0)
    align_loops = 1;
  if (align_loops_max_skip > align_loops)
    align_loops_max_skip = align_loops - 1;
  align_loops_log = floor_log2 (align_loops * 2 - 1);
  if (align_jumps <= 0)
    align_jumps = 1;
  if (align_jumps_max_skip > align_jumps)
    align_jumps_max_skip = align_jumps - 1;
  align_jumps_log = floor_log2 (align_jumps * 2 - 1);
  if (align_labels <= 0)
    align_labels = 1;
  align_labels_log = floor_log2 (align_labels * 2 - 1);
  if (align_labels_max_skip > align_labels)
    align_labels_max_skip = align_labels - 1;
  if (align_functions <= 0)
    align_functions = 1;
  align_functions_log = floor_log2 (align_functions * 2 - 1);
}

/* Process the options that have been parsed.  */
static void
process_options (void)
{
  /* Just in case lang_hooks.post_options ends up calling a debug_hook.
     This can happen with incorrect pre-processed input. */
  debug_hooks = &do_nothing_debug_hooks;

  maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;

  /* Default to -fdiagnostics-color=auto if GCC_COLORS is in the environment,
     otherwise default to -fdiagnostics-color=never.  */
  if (!global_options_set.x_flag_diagnostics_show_color
      && getenv ("GCC_COLORS"))
    pp_show_color (global_dc->printer)
      = colorize_init (DIAGNOSTICS_COLOR_AUTO);

  /* Allow the front end to perform consistency checks and do further
     initialization based on the command line options.  This hook also
     sets the original filename if appropriate (e.g. foo.i -> foo.c)
     so we can correctly initialize debug output.  */
  no_backend = lang_hooks.post_options (&main_input_filename);

  /* Some machines may reject certain combinations of options.  */
  targetm.target_option.override ();

  /* Avoid any informative notes in the second run of -fcompare-debug.  */
  if (flag_compare_debug) 
    diagnostic_inhibit_notes (global_dc);

  if (flag_section_anchors && !target_supports_section_anchors_p ())
    {
      warning (OPT_fsection_anchors,
	       "this target does not support %qs", "-fsection-anchors");
      flag_section_anchors = 0;
    }

  if (flag_short_enums == 2)
    flag_short_enums = targetm.default_short_enums ();

  /* Set aux_base_name if not already set.  */
  if (aux_base_name)
    ;
  else if (main_input_filename)
    {
      char *name = xstrdup (lbasename (main_input_filename));

      strip_off_ending (name, strlen (name));
      aux_base_name = name;
    }
  else
    aux_base_name = "gccaux";

#ifndef HAVE_cloog
  if (flag_graphite
      || flag_graphite_identity
      || flag_loop_block
      || flag_loop_interchange
      || flag_loop_strip_mine
      || flag_loop_parallelize_all)
    sorry ("Graphite loop optimizations cannot be used (-fgraphite, "
	   "-fgraphite-identity, -floop-block, "
	   "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
	   "and -ftree-loop-linear)");
#endif

  /* One region RA really helps to decrease the code size.  */
  if (flag_ira_region == IRA_REGION_AUTODETECT)
    flag_ira_region
      = optimize_size || !optimize ? IRA_REGION_ONE : IRA_REGION_MIXED;

  if (flag_strict_volatile_bitfields > 0 && !abi_version_at_least (2))
    {
      warning (0, "-fstrict-volatile-bitfields disabled; "
	       "it is incompatible with ABI versions < 2");
      flag_strict_volatile_bitfields = 0;
    }

  /* Unrolling all loops implies that standard loop unrolling must also
     be done.  */
  if (flag_unroll_all_loops)
    flag_unroll_loops = 1;

  /* web and rename-registers help when run after loop unrolling.  */
  if (flag_web == AUTODETECT_VALUE)
    flag_web = flag_unroll_loops || flag_peel_loops;

  if (flag_rename_registers == AUTODETECT_VALUE)
    flag_rename_registers = flag_unroll_loops || flag_peel_loops;

  if (flag_non_call_exceptions)
    flag_asynchronous_unwind_tables = 1;
  if (flag_asynchronous_unwind_tables)
    flag_unwind_tables = 1;

  if (flag_value_profile_transformations)
    flag_profile_values = 1;

  /* Warn about options that are not supported on this machine.  */
#ifndef INSN_SCHEDULING
  if (flag_schedule_insns || flag_schedule_insns_after_reload)
    warning (0, "instruction scheduling not supported on this target machine");
#endif
#ifndef DELAY_SLOTS
  if (flag_delayed_branch)
    warning (0, "this target machine does not have delayed branches");
#endif

  user_label_prefix = USER_LABEL_PREFIX;
  if (flag_leading_underscore != -1)
    {
      /* If the default prefix is more complicated than "" or "_",
	 issue a warning and ignore this option.  */
      if (user_label_prefix[0] == 0 ||
	  (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
	{
	  user_label_prefix = flag_leading_underscore ? "_" : "";
	}
      else
	warning (0, "-f%sleading-underscore not supported on this target machine",
		 flag_leading_underscore ? "" : "no-");
    }

  /* If we are in verbose mode, write out the version and maybe all the
     option flags in use.  */
  if (version_flag)
    {
      print_version (stderr, "");
      if (! quiet_flag)
	print_switch_values (print_to_stderr);
    }

  if (flag_syntax_only)
    {
      write_symbols = NO_DEBUG;
      profile_flag = 0;
    }

  if (flag_gtoggle)
    {
      if (debug_info_level == DINFO_LEVEL_NONE)
	{
	  debug_info_level = DINFO_LEVEL_NORMAL;

	  if (write_symbols == NO_DEBUG)
	    write_symbols = PREFERRED_DEBUGGING_TYPE;
	}
      else
	debug_info_level = DINFO_LEVEL_NONE;
    }

  if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
    {
      FILE *final_output = fopen (flag_dump_final_insns, "w");
      if (!final_output)
	{
	  error ("could not open final insn dump file %qs: %m",
		 flag_dump_final_insns);
	  flag_dump_final_insns = NULL;
	}
      else if (fclose (final_output))
	{
	  error ("could not close zeroed insn dump file %qs: %m",
		 flag_dump_final_insns);
	  flag_dump_final_insns = NULL;
	}
    }

  /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
     level is 0.  */
  if (debug_info_level == DINFO_LEVEL_NONE)
    write_symbols = NO_DEBUG;

  if (write_symbols == NO_DEBUG)
    ;
#if defined(DBX_DEBUGGING_INFO)
  else if (write_symbols == DBX_DEBUG)
    debug_hooks = &dbx_debug_hooks;
#endif
#if defined(XCOFF_DEBUGGING_INFO)
  else if (write_symbols == XCOFF_DEBUG)
    debug_hooks = &xcoff_debug_hooks;
#endif
#ifdef SDB_DEBUGGING_INFO
  else if (write_symbols == SDB_DEBUG)
    debug_hooks = &sdb_debug_hooks;
#endif
#ifdef DWARF2_DEBUGGING_INFO
  else if (write_symbols == DWARF2_DEBUG)
    debug_hooks = &dwarf2_debug_hooks;
#endif
#ifdef VMS_DEBUGGING_INFO
  else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
    debug_hooks = &vmsdbg_debug_hooks;
#endif
  else
    error ("target system does not support the \"%s\" debug format",
	   debug_type_names[write_symbols]);

  if (flag_auto_profile && debug_info_level == DINFO_LEVEL_NONE)
    debug_hooks = &auto_profile_debug_hooks;

  /* We know which debug output will be used so we can set flag_var_tracking
     and flag_var_tracking_uninit if the user has not specified them.  */
  if (debug_info_level < DINFO_LEVEL_NORMAL
      || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
    {
      if (flag_var_tracking == 1
	  || flag_var_tracking_uninit == 1)
        {
	  if (debug_info_level < DINFO_LEVEL_NORMAL)
	    warning (0, "variable tracking requested, but useless unless "
		     "producing debug info");
	  else
	    warning (0, "variable tracking requested, but not supported "
		     "by this debug format");
	}
      flag_var_tracking = 0;
      flag_var_tracking_uninit = 0;
    }

  /* The debug hooks are used to implement -fdump-go-spec because it
     gives a simple and stable API for all the information we need to
     dump.  */
  if (flag_dump_go_spec != NULL)
    debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks);

  /* If the user specifically requested variable tracking with tagging
     uninitialized variables, we need to turn on variable tracking.
     (We already determined above that variable tracking is feasible.)  */
  if (flag_var_tracking_uninit == 1)
    flag_var_tracking = 1;

  if (flag_var_tracking == AUTODETECT_VALUE)
    flag_var_tracking = optimize >= 1;

  if (flag_var_tracking_uninit == AUTODETECT_VALUE)
    flag_var_tracking_uninit = flag_var_tracking;

  if (flag_var_tracking_assignments == AUTODETECT_VALUE)
    flag_var_tracking_assignments = flag_var_tracking
      && !(flag_selective_scheduling || flag_selective_scheduling2);

  if (flag_var_tracking_assignments_toggle)
    flag_var_tracking_assignments = !flag_var_tracking_assignments;

  if (flag_var_tracking_assignments && !flag_var_tracking)
    flag_var_tracking = flag_var_tracking_assignments = -1;

  if (flag_var_tracking_assignments
      && (flag_selective_scheduling || flag_selective_scheduling2))
    warning (0, "var-tracking-assignments changes selective scheduling");

  if (flag_tree_cselim == AUTODETECT_VALUE)
#ifdef HAVE_conditional_move
    flag_tree_cselim = 1;
#else
    flag_tree_cselim = 0;
#endif

  /* If auxiliary info generation is desired, open the output file.
     This goes in the same directory as the source file--unlike
     all the other output files.  */
  if (flag_gen_aux_info)
    {
      aux_info_file = fopen (aux_info_file_name, "w");
      if (aux_info_file == 0)
	fatal_error ("can%'t open %s: %m", aux_info_file_name);
    }

  if (!targetm_common.have_named_sections)
    {
      if (flag_function_sections)
	{
	  warning (0, "-ffunction-sections not supported for this target");
	  flag_function_sections = 0;
	}
      if (flag_data_sections)
	{
	  warning (0, "-fdata-sections not supported for this target");
	  flag_data_sections = 0;
	}
    }

#ifndef HAVE_prefetch
  if (flag_prefetch_loop_arrays > 0)
    {
      warning (0, "-fprefetch-loop-arrays not supported for this target");
      flag_prefetch_loop_arrays = 0;
    }
#else
  if (flag_prefetch_loop_arrays > 0 && !HAVE_prefetch)
    {
      warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
      flag_prefetch_loop_arrays = 0;
    }
#endif

  /* This combination of options isn't handled for i386 targets and doesn't
     make much sense anyway, so don't allow it.  */
  if (flag_prefetch_loop_arrays > 0 && optimize_size)
    {
      warning (0, "-fprefetch-loop-arrays is not supported with -Os");
      flag_prefetch_loop_arrays = 0;
    }

  /* The presence of IEEE signaling NaNs, implies all math can trap.  */
  if (flag_signaling_nans)
    flag_trapping_math = 1;

  /* We cannot reassociate if we want traps or signed zeros.  */
  if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
    {
      warning (0, "-fassociative-math disabled; other options take precedence");
      flag_associative_math = 0;
    }

  /* With -fcx-limited-range, we do cheap and quick complex arithmetic.  */
  if (flag_cx_limited_range)
    flag_complex_method = 0;

  /* With -fcx-fortran-rules, we do something in-between cheap and C99.  */
  if (flag_cx_fortran_rules)
    flag_complex_method = 1;

  /* Targets must be able to place spill slots at lower addresses.  If the
     target already uses a soft frame pointer, the transition is trivial.  */
  if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
    {
      warning (0, "-fstack-protector not supported for this target");
      flag_stack_protect = 0;
    }
  if (!flag_stack_protect)
    warn_stack_protect = 0;

  /* Address Sanitizer needs porting to each target architecture.  */

  if ((flag_sanitize & SANITIZE_ADDRESS)
      && !FRAME_GROWS_DOWNWARD)
    {
      warning (0,
	       "-fsanitize=address and -fsanitize=kernel-address "
	       "are not supported for this target");
      flag_sanitize &= ~SANITIZE_ADDRESS;
    }

  if ((flag_sanitize & SANITIZE_USER_ADDRESS)
      && targetm.asan_shadow_offset == NULL)
    {
      warning (0, "-fsanitize=address not supported for this target");
      flag_sanitize &= ~SANITIZE_ADDRESS;
    }

  /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
     have not been set.  */
  if (!global_options_set.x_warnings_are_errors
      && warn_coverage_mismatch
      && (global_dc->classify_diagnostic[OPT_Wcoverage_mismatch] ==
          DK_UNSPECIFIED))
    diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_mismatch,
                                    DK_ERROR, UNKNOWN_LOCATION);

  /* Save the current optimization options.  */
  optimization_default_node = build_optimization_node (&global_options);
  optimization_current_node = optimization_default_node;
}

/* This function can be called multiple times to reinitialize the compiler
   back end when register classes or instruction sets have changed,
   before each function.  */
static void
backend_init_target (void)
{
  /* Initialize alignment variables.  */
  init_alignments ();

  /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
     to initialize reg_raw_mode[].  */
  init_emit_regs ();

  /* This invokes target hooks to set fixed_reg[] etc, which is
     mode-dependent.  */
  init_regs ();

  /* This depends on stack_pointer_rtx.  */
  init_fake_stack_mems ();

  /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
     mode-dependent.  */
  init_alias_target ();

  /* Depends on HARD_FRAME_POINTER_REGNUM.  */
  init_reload ();

  /* The following initialization functions need to generate rtl, so
     provide a dummy function context for them.  */
  init_dummy_function_start ();

  /* rtx_cost is mode-dependent, so cached values need to be recomputed
     on a mode change.  */
  init_expmed ();
  init_lower_subreg ();

  /* We may need to recompute regno_save_code[] and regno_restore_code[]
     after a mode change as well.  */
  caller_save_initialized_p = false;

  expand_dummy_function_end ();
}

/* Initialize the compiler back end.  This function is called only once,
   when starting the compiler.  */
static void
backend_init (void)
{
  init_emit_once ();

  init_rtlanal ();
  init_inline_once ();
  init_varasm_once ();
  save_register_info ();

  /* Initialize the target-specific back end pieces.  */
  ira_init_once ();
  backend_init_target ();
}

/* Initialize excess precision settings.  */
static void
init_excess_precision (void)
{
  /* Adjust excess precision handling based on the target options.  If
     the front end cannot handle it, flag_excess_precision_cmdline
     will already have been set accordingly in the post_options
     hook.  */
  gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
  flag_excess_precision = flag_excess_precision_cmdline;
  if (flag_unsafe_math_optimizations)
    flag_excess_precision = EXCESS_PRECISION_FAST;
  if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
    {
      int flt_eval_method = TARGET_FLT_EVAL_METHOD;
      switch (flt_eval_method)
	{
	case -1:
	case 0:
	  /* Either the target acts unpredictably (-1) or has all the
	     operations required not to have excess precision (0).  */
	  flag_excess_precision = EXCESS_PRECISION_FAST;
	  break;
	case 1:
	case 2:
	  /* In these cases, predictable excess precision makes
	     sense.  */
	  break;
	default:
	  /* Any other implementation-defined FLT_EVAL_METHOD values
	     require the compiler to handle the associated excess
	     precision rules in excess_precision_type.  */
	  gcc_unreachable ();
	}
    }
}

/* Initialize things that are both lang-dependent and target-dependent.
   This function can be called more than once if target parameters change.  */
static void
lang_dependent_init_target (void)
{
  /* This determines excess precision settings.  */
  init_excess_precision ();

  /* This creates various _DECL nodes, so needs to be called after the
     front end is initialized.  It also depends on the HAVE_xxx macros
     generated from the target machine description.  */
  init_optabs ();

  /* The following initialization functions need to generate rtl, so
     provide a dummy function context for them.  */
  init_dummy_function_start ();

  /* Do the target-specific parts of expr initialization.  */
  init_expr_target ();

  /* Although the actions of these functions are language-independent,
     they use optabs, so we cannot call them from backend_init.  */
  init_set_costs ();
  ira_init ();

  expand_dummy_function_end ();
}

/* Language-dependent initialization.  Returns nonzero on success.  */
static int
lang_dependent_init (const char *name)
{
  location_t save_loc = input_location;
  if (dump_base_name == 0)
    dump_base_name = name && name[0] ? name : "gccdump";

  /* Other front-end initialization.  */
  input_location = BUILTINS_LOCATION;
  if (lang_hooks.init () == 0)
    return 0;
  input_location = save_loc;

  if (!flag_wpa)
    {
      init_asm_output (name);

      /* If stack usage information is desired, open the output file.  */
      if (flag_stack_usage)
	stack_usage_file = open_auxiliary_file ("su");
    }

  /* This creates various _DECL nodes, so needs to be called after the
     front end is initialized.  */
  init_eh ();

  /* Do the target-specific parts of the initialization.  */
  lang_dependent_init_target ();

  if (!flag_wpa)
    {
      /* If dbx symbol table desired, initialize writing it and output the
	 predefined types.  */
      timevar_push (TV_SYMOUT);

      /* Now we have the correct original filename, we can initialize
	 debug output.  */
      (*debug_hooks->init) (name);

      timevar_pop (TV_SYMOUT);
    }

  return 1;
}


/* Reinitialize everything when target parameters, such as register usage,
   have changed.  */
void
target_reinit (void)
{
  struct rtl_data saved_x_rtl;
  rtx *saved_regno_reg_rtx;
  tree saved_optimization_current_node;
  struct target_optabs *saved_this_fn_optabs;

  /* Temporarily switch to the default optimization node, so that
     *this_target_optabs is set to the default, not reflecting
     whatever a previous function used for the optimize
     attribute.  */
  saved_optimization_current_node = optimization_current_node;
  saved_this_fn_optabs = this_fn_optabs;
  if (saved_optimization_current_node != optimization_default_node)
    {
      optimization_current_node = optimization_default_node;
      cl_optimization_restore
	(&global_options,
	 TREE_OPTIMIZATION (optimization_default_node));
    }
  this_fn_optabs = this_target_optabs;

  /* Save *crtl and regno_reg_rtx around the reinitialization
     to allow target_reinit being called even after prepare_function_start.  */
  saved_regno_reg_rtx = regno_reg_rtx;
  if (saved_regno_reg_rtx)
    {  
      saved_x_rtl = *crtl;
      memset (crtl, '\0', sizeof (*crtl));
      regno_reg_rtx = NULL;
    }

  /* Reinitialize RTL backend.  */
  backend_init_target ();

  /* Reinitialize lang-dependent parts.  */
  lang_dependent_init_target ();

  /* Restore the original optimization node.  */
  if (saved_optimization_current_node != optimization_default_node)
    {
      optimization_current_node = saved_optimization_current_node;
      cl_optimization_restore (&global_options,
			       TREE_OPTIMIZATION (optimization_current_node));
    }
  this_fn_optabs = saved_this_fn_optabs;

  /* Restore regno_reg_rtx at the end, as free_after_compilation from
     expand_dummy_function_end clears it.  */
  if (saved_regno_reg_rtx)
    {
      *crtl = saved_x_rtl;
      regno_reg_rtx = saved_regno_reg_rtx;
      saved_regno_reg_rtx = NULL;
    }
}

void
dump_memory_report (bool final)
{
  dump_line_table_statistics ();
  ggc_print_statistics ();
  stringpool_statistics ();
  dump_tree_statistics ();
  dump_gimple_statistics ();
  dump_rtx_statistics ();
  dump_alloc_pool_statistics ();
  dump_bitmap_statistics ();
  dump_vec_loc_statistics ();
  dump_ggc_loc_statistics (final);
  dump_alias_stats (stderr);
  dump_pta_stats (stderr);
}

/* Clean up: close opened files, etc.  */

static void
finalize (bool no_backend)
{
  /* Close the dump files.  */
  if (flag_gen_aux_info)
    {
      fclose (aux_info_file);
      if (seen_error ())
	unlink (aux_info_file_name);
    }

  /* Close non-debugging input and output files.  Take special care to note
     whether fclose returns an error, since the pages might still be on the
     buffer chain while the file is open.  */

  if (asm_out_file)
    {
      if (ferror (asm_out_file) != 0)
	fatal_error ("error writing to %s: %m", asm_file_name);
      if (fclose (asm_out_file) != 0)
	fatal_error ("error closing %s: %m", asm_file_name);
    }

  if (stack_usage_file)
    fclose (stack_usage_file);

  if (!no_backend)
    {
      statistics_fini ();

      g->get_passes ()->finish_optimization_passes ();

      ira_finish_once ();
    }

  if (mem_report)
    dump_memory_report (true);

  if (profile_report)
    dump_profile_report ();

  /* Language-specific end of compilation actions.  */
  lang_hooks.finish ();
}

/* Initialize the compiler, and compile the input file.  */
static void
do_compile (void)
{
  /* Initialize timing first.  The C front ends read the main file in
     the post_options hook, and C++ does file timings.  */
  if (time_report || !quiet_flag  || flag_detailed_statistics)
    timevar_init ();
  timevar_start (TV_TOTAL);

  process_options ();

  /* Don't do any more if an error has already occurred.  */
  if (!seen_error ())
    {
      timevar_start (TV_PHASE_SETUP);

      /* This must be run always, because it is needed to compute the FP
	 predefined macros, such as __LDBL_MAX__, for targets using non
	 default FP formats.  */
      init_adjust_machine_modes ();

      /* Set up the back-end if requested.  */
      if (!no_backend)
	backend_init ();

      /* Language-dependent initialization.  Returns true on success.  */
      if (lang_dependent_init (main_input_filename))
        {
          /* Initialize yet another pass.  */

          ggc_protect_identifiers = true;

          init_cgraph ();
          init_final (main_input_filename);
          coverage_init (aux_base_name, main_input_filename);
          statistics_init ();
          invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);

          timevar_stop (TV_PHASE_SETUP);

          compile_file ();
	  if (flag_record_compilation_info_in_elf)
	    write_compilation_info_to_asm ();
        }
      else
        {
          timevar_stop (TV_PHASE_SETUP);
        }

      timevar_start (TV_PHASE_FINALIZE);

      finalize (no_backend);

      timevar_stop (TV_PHASE_FINALIZE);
    }

  /* Stop timing and print the times.  */
  timevar_stop (TV_TOTAL);
  timevar_print (stderr);
}

/* Entry point of cc1, cc1plus, jc1, f771, etc.
   Exit code is FATAL_EXIT_CODE if can't open files or if there were
   any errors, or SUCCESS_EXIT_CODE if compilation succeeded.

   It is not safe to call this function more than once.  */

int
toplev_main (int argc, char **argv)
{
  /* Parsing and gimplification sometimes need quite large stack.
     Increase stack size limits if possible.  */
  stack_limit_increase (64 * 1024 * 1024);

  expandargv (&argc, &argv);

  /* Initialization of GCC's environment, and diagnostics.  */
  general_init (argv[0]);

  /* One-off initialization of options that does not need to be
     repeated when options are added for particular functions.  */
  init_options_once ();

  /* Initialize global options structures; this must be repeated for
     each structure used for parsing options.  */
  init_options_struct (&global_options, &global_options_set);
  lang_hooks.init_options_struct (&global_options);

  /* Convert the options to an array.  */
  decode_cmdline_options_to_array_default_mask (argc,
						CONST_CAST2 (const char **,
							     char **, argv),
						&save_decoded_options,
						&save_decoded_options_count);

  /* Perform language-specific options initialization.  */
  lang_hooks.init_options (save_decoded_options_count, save_decoded_options);

  /* Parse the options and do minimal processing; basically just
     enough to default flags appropriately.  */
  decode_options (&global_options, &global_options_set,
		  save_decoded_options, save_decoded_options_count,
		  UNKNOWN_LOCATION, global_dc);

  handle_common_deferred_options ();

  init_local_tick ();

  initialize_plugins ();

  if (version_flag)
    print_version (stderr, "");

  if (help_flag)
    print_plugins_help (stderr, "");

  /* Exit early if we can (e.g. -help).  */
  if (!exit_after_options)
    do_compile ();

  if (warningcount || errorcount || werrorcount)
    print_ignored_options ();

  /* Invoke registered plugin callbacks if any.  Some plugins could
     emit some diagnostics here.  */
  invoke_plugin_callbacks (PLUGIN_FINISH, NULL);

  diagnostic_finish (global_dc);

  finalize_plugins ();
  location_adhoc_data_fini (line_table);
  if (seen_error () || werrorcount)
    return (FATAL_EXIT_CODE);

  return (SUCCESS_EXIT_CODE);
}