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
|
/* Register Transfer Language (RTL) definitions for GNU C-Compiler
Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _RTL_H
#define _RTL_H
#include "machmode.h"
#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
#undef FLOAT /* Likewise. */
#undef ABS /* Likewise. */
#undef PC /* Likewise. */
#ifndef TREE_CODE
union tree_node;
#endif
/* Register Transfer Language EXPRESSIONS CODES */
#define RTX_CODE enum rtx_code
enum rtx_code {
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
#include "rtl.def" /* rtl expressions are documented here */
#undef DEF_RTL_EXPR
LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
NUM_RTX_CODE.
Assumes default enum value assignment. */
#define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
/* The cast here, saves many elsewhere. */
extern int rtx_length[];
#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
extern char *rtx_name[];
#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
extern char *rtx_format[];
#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
extern char rtx_class[];
#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
relative to which the offsets are calculated, as explained in rtl.def. */
typedef struct
{
/* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
unsigned min_align: 8;
/* Flags: */
unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
unsigned min_after_base: 1; /* minimum address target label is after BASE. */
unsigned max_after_base: 1; /* maximum address target label is after BASE. */
/* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
unsigned : 2;
unsigned scale : 8;
} addr_diff_vec_flags;
/* Common union for an element of an rtx. */
typedef union rtunion_def
{
HOST_WIDE_INT rtwint;
int rtint;
char *rtstr;
struct rtx_def *rtx;
struct rtvec_def *rtvec;
enum machine_mode rttype;
addr_diff_vec_flags rt_addr_diff_vec_flags;
struct bitmap_head_def *rtbit;
union tree_node *rttree;
struct basic_block_def *bb;
} rtunion;
/* RTL expression ("rtx"). */
typedef struct rtx_def
{
#ifdef ONLY_INT_FIELDS
#ifdef CODE_FIELD_BUG
unsigned int code : 16;
#else
unsigned short code;
#endif
#else
/* The kind of expression this is. */
enum rtx_code code : 16;
#endif
/* The kind of value the expression has. */
#ifdef ONLY_INT_FIELDS
int mode : 8;
#else
enum machine_mode mode : 8;
#endif
/* LINK_COST_ZERO in an INSN_LIST. */
unsigned int jump : 1;
/* LINK_COST_FREE in an INSN_LIST. */
unsigned int call : 1;
/* 1 in a MEM or REG if value of this expression will never change
during the current function, even though it is not
manifestly constant.
1 in a SUBREG if it is from a promoted variable that is unsigned.
1 in a SYMBOL_REF if it addresses something in the per-function
constants pool.
1 in a CALL_INSN if it is a const call.
1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
reorg until end of compilation; cleared before used. */
unsigned int unchanging : 1;
/* 1 in a MEM expression if contents of memory are volatile.
1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
if it is deleted.
1 in a REG expression if corresponds to a variable declared by the user.
0 for an internally generated temporary.
In a SYMBOL_REF, this flag is used for machine-specific purposes.
In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
unsigned int volatil : 1;
/* 1 in a MEM referring to a field of an aggregate.
0 if the MEM was a variable or the result of a * operator in C;
1 if it was the result of a . or -> operator (on a struct) in C.
1 in a REG if the register is used only in exit code a loop.
1 in a SUBREG expression if was generated from a variable with a
promoted mode.
1 in a CODE_LABEL if the label is used for nonlocal gotos
and must not be deleted even if its count is zero.
1 in a LABEL_REF if this is a reference to a label outside the
current loop.
1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
together with the preceding insn. Valid only within sched.
1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
from the target of a branch. Valid from reorg until end of compilation;
cleared before used. */
unsigned int in_struct : 1;
/* 1 if this rtx is used. This is used for copying shared structure.
See `unshare_all_rtl'.
In a REG, this is not needed for that purpose, and used instead
in `leaf_renumber_regs_insn'.
In a SYMBOL_REF, means that emit_library_call
has used it as the function. */
unsigned int used : 1;
/* Nonzero if this rtx came from procedure integration.
In a REG, nonzero means this reg refers to the return value
of the current function. */
unsigned integrated : 1;
/* 1 in an INSN or a SET if this rtx is related to the call frame,
either changing how we compute the frame address or saving and
restoring registers in the prologue and epilogue.
1 in a MEM if the MEM refers to a scalar, rather than a member of
an aggregate. */
unsigned frame_related : 1;
/* The first element of the operands of this rtx.
The number of operands and their types are controlled
by the `code' field, according to rtl.def. */
rtunion fld[1];
} *rtx;
#define NULL_RTX (rtx) 0
/* Define macros to access the `code' field of the rtx. */
#ifdef SHORT_ENUM_BUG
#define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
#define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
#else
#define GET_CODE(RTX) ((RTX)->code)
#define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
#endif
#define GET_MODE(RTX) ((RTX)->mode)
#define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
/* RTL vector. These appear inside RTX's when there is a need
for a variable number of things. The principle use is inside
PARALLEL expressions. */
typedef struct rtvec_def{
int num_elem; /* number of elements */
rtunion elem[1];
} *rtvec;
#define NULL_RTVEC (rtvec) 0
#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx)
/* 1 if X is a REG. */
#define REG_P(X) (GET_CODE (X) == REG)
/* 1 if X is a constant value that is an integer. */
#define CONSTANT_P(X) \
(GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
|| GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
|| GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
|| GET_CODE (X) == CONSTANT_P_RTX)
/* General accessor macros for accessing the fields of an rtx. */
#define XEXP(RTX, N) ((RTX)->fld[N].rtx)
#define XINT(RTX, N) ((RTX)->fld[N].rtint)
#define XWINT(RTX, N) ((RTX)->fld[N].rtwint)
#define XSTR(RTX, N) ((RTX)->fld[N].rtstr)
#define XVEC(RTX, N) ((RTX)->fld[N].rtvec)
#define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem)
#define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx)
#define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit)
#define XTREE(RTX, N) ((RTX)->fld[N].rttree)
/* ACCESS MACROS for particular fields of insns. */
/* Holds a unique number for each insn.
These are not necessarily sequentially increasing. */
#define INSN_UID(INSN) ((INSN)->fld[0].rtint)
/* Chain insns together in sequence. */
#define PREV_INSN(INSN) ((INSN)->fld[1].rtx)
#define NEXT_INSN(INSN) ((INSN)->fld[2].rtx)
/* The body of an insn. */
#define PATTERN(INSN) ((INSN)->fld[3].rtx)
/* Code number of instruction, from when it was recognized.
-1 means this instruction has not been recognized yet. */
#define INSN_CODE(INSN) ((INSN)->fld[4].rtint)
/* Set up in flow.c; empty before then.
Holds a chain of INSN_LIST rtx's whose first operands point at
previous insns with direct data-flow connections to this one.
That means that those insns set variables whose next use is in this insn.
They are always in the same basic block as this insn. */
#define LOG_LINKS(INSN) ((INSN)->fld[5].rtx)
/* 1 if insn has been deleted. */
#define INSN_DELETED_P(INSN) ((INSN)->volatil)
/* 1 if insn is a call to a const function. */
#define CONST_CALL_P(INSN) ((INSN)->unchanging)
/* 1 if insn is a branch that should not unconditionally execute its
delay slots, i.e., it is an annulled branch. */
#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
/* 1 if insn is in a delay slot and is from the target of the branch. If
the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
executed if the branch is taken. For annulled branches with this bit
clear, the insn should be executed only if the branch is not taken. */
#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
/* Holds a list of notes on what this insn does to various REGs.
It is a chain of EXPR_LIST rtx's, where the second operand
is the chain pointer and the first operand is the REG being described.
The mode field of the EXPR_LIST contains not a real machine mode
but a value that says what this note says about the REG:
REG_DEAD means that the value in REG dies in this insn (i.e., it is
not needed past this insn). If REG is set in this insn, the REG_DEAD
note may, but need not, be omitted.
REG_INC means that the REG is autoincremented or autodecremented.
REG_EQUIV describes the insn as a whole; it says that the insn
sets a register to a constant value or to be equivalent to a memory
address. If the register is spilled to the stack then the constant
value should be substituted for it. The contents of the REG_EQUIV
is the constant value or memory address, which may be different
from the source of the SET although it has the same value. A
REG_EQUIV note may also appear on an insn which copies a register
parameter to a pseudo-register, if there is a memory address which
could be used to hold that pseudo-register throughout the function.
REG_EQUAL is like REG_EQUIV except that the destination
is only momentarily equal to the specified rtx. Therefore, it
cannot be used for substitution; but it can be used for cse.
REG_RETVAL means that this insn copies the return-value of
a library call out of the hard reg for return values. This note
is actually an INSN_LIST and it points to the first insn involved
in setting up arguments for the call. flow.c uses this to delete
the entire library call when its result is dead.
REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
of the library call and points at the one that has the REG_RETVAL.
REG_WAS_0 says that the register set in this insn held 0 before the insn.
The contents of the note is the insn that stored the 0.
If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
REG_NONNEG means that the register is always nonnegative during
the containing loop. This is used in branches so that decrement and
branch instructions terminating on zero can be matched. There must be
an insn pattern in the md file named `decrement_and_branch_until_zero'
or else this will never be added to any instructions.
REG_NO_CONFLICT means there is no conflict *after this insn*
between the register in the note and the destination of this insn.
REG_UNUSED identifies a register set in this insn and never used.
REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
CC0, respectively. Normally, these are required to be consecutive insns,
but we permit putting a cc0-setting insn in the delay slot of a branch
as long as only one copy of the insn exists. In that case, these notes
point from one to the other to allow code generation to determine what
any require information and to properly update CC_STATUS.
REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
say that the CODE_LABEL contained in the REG_LABEL note is used
by the insn.
REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
(write after write) dependencies. Data dependencies, which are the only
type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
/* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
-fbranch-probabilities is given. It has an integer value. For jumps,
it is the probability that this is a taken branch. For calls, it is the
probability that this call won't return.
REG_EXEC_COUNT is attached to the first insn of each basic block, and
the first insn after each CALL_INSN. It indicates how many times this
block was executed.
REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
allocations for targets where SETJMP_VIA_SAVE_AREA is true.
REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
flags computed by get_jump_flags() after dbr scheduling is complete.
REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
but are too complex for DWARF to interpret what they imply. The attached
rtx is used instead of intuition. */
/* REG_EH_REGION is used to indicate what exception region an INSN
belongs in. This can be used to indicate what region a call may throw
to. A REGION of 0 indicates that a call cannot throw at all.
A REGION of -1 indicates that it cannot throw, nor will it execute
a non-local goto.
REG_EH_RETHROW is used to indicate what that a call is actually a
call to rethrow, and specifies which region the rethrow is targetting.
This provides a way to generate the non standard flow edges required
for a rethrow. */
#define REG_NOTES(INSN) ((INSN)->fld[6].rtx)
#define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags)
/* Don't forget to change reg_note_name in rtl.c. */
enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4,
REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7,
REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10,
REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13,
REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15, REG_BR_PROB = 16,
REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19,
REG_BR_PRED = 20, REG_EH_CONTEXT = 21,
REG_FRAME_RELATED_EXPR = 22, REG_EH_REGION = 23,
REG_EH_RETHROW = 24 };
/* The base value for branch probability notes. */
#define REG_BR_PROB_BASE 10000
/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
/* Names for REG_NOTE's in EXPR_LIST insn's. */
extern char *reg_note_name[];
#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
USE and CLOBBER expressions.
USE expressions list the registers filled with arguments that
are passed to the function.
CLOBBER expressions document the registers explicitly clobbered
by this CALL_INSN.
Pseudo registers can not be mentioned in this list. */
#define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx)
/* The label-number of a code-label. The assembler label
is made from `L' and the label-number printed in decimal.
Label numbers are unique in a compilation. */
#define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint)
#define LINE_NUMBER NOTE
/* In a NOTE that is a line number, this is a string for the file name that the
line is in. We use the same field to record block numbers temporarily in
NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
between ints and pointers if we use a different macro for the block number.)
The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
information as a rtx in the field. */
#define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr)
#define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint)
#define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx)
#define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx)
#define NOTE_BASIC_BLOCK(INSN) ((INSN)->fld[3].bb)
/* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new
block node for a live range block. */
#define NOTE_BLOCK_LIVE_RANGE_BLOCK -1
/* In a NOTE that is a line number, this is the line number.
Other kinds of NOTEs are identified by negative numbers here. */
#define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint)
/* Codes that appear in the NOTE_LINE_NUMBER field
for kinds of notes that are not line numbers.
Notice that we do not try to use zero here for any of
the special note codes because sometimes the source line
actually can be zero! This happens (for example) when we
are generating code for the per-translation-unit constructor
and destructor routines for some C++ translation unit.
If you should change any of the following values, or if you
should add a new value here, don't forget to change the
note_insn_name array in rtl.c. */
/* This note is used to get rid of an insn
when it isn't safe to patch the insn out of the chain. */
#define NOTE_INSN_DELETED -1
#define NOTE_INSN_BLOCK_BEG -2
#define NOTE_INSN_BLOCK_END -3
#define NOTE_INSN_LOOP_BEG -4
#define NOTE_INSN_LOOP_END -5
/* This kind of note is generated at the end of the function body,
just before the return insn or return label.
In an optimizing compilation it is deleted by the first jump optimization,
after enabling that optimizer to determine whether control can fall
off the end of the function body without a return statement. */
#define NOTE_INSN_FUNCTION_END -6
/* This kind of note is generated just after each call to `setjmp', et al. */
#define NOTE_INSN_SETJMP -7
/* Generated at the place in a loop that `continue' jumps to. */
#define NOTE_INSN_LOOP_CONT -8
/* Generated at the start of a duplicated exit test. */
#define NOTE_INSN_LOOP_VTOP -9
/* This marks the point immediately after the last prologue insn. */
#define NOTE_INSN_PROLOGUE_END -10
/* This marks the point immediately prior to the first epilogue insn. */
#define NOTE_INSN_EPILOGUE_BEG -11
/* Generated in place of user-declared labels when they are deleted. */
#define NOTE_INSN_DELETED_LABEL -12
/* This note indicates the start of the real body of the function,
i.e. the point just after all of the parms have been moved into
their homes, etc. */
#define NOTE_INSN_FUNCTION_BEG -13
/* These note where exception handling regions begin and end. */
#define NOTE_INSN_EH_REGION_BEG -14
#define NOTE_INSN_EH_REGION_END -15
/* Generated whenever a duplicate line number note is output. For example,
one is output after the end of an inline function, in order to prevent
the line containing the inline call from being counted twice in gcov. */
#define NOTE_REPEATED_LINE_NUMBER -16
/* Start/end of a live range region, where pseudos allocated on the stack can
be allocated to temporary registers. */
#define NOTE_INSN_RANGE_START -17
#define NOTE_INSN_RANGE_END -18
/* Record which registers are currently live. */
#define NOTE_INSN_LIVE -19
/* Record the struct for the following basic block. */
#define NOTE_INSN_BASIC_BLOCK -20
#if 0 /* These are not used, and I don't know what they were for. --rms. */
#define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr)
#define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint)
#define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx)
#define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint)
#define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint)
#endif /* 0 */
/* Names for NOTE insn's other than line numbers. */
extern char *note_insn_name[];
#define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
/* The name of a label, in case it corresponds to an explicit label
in the input source code. */
#define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr)
/* In jump.c, each label contains a count of the number
of LABEL_REFs that point at it, so unused labels can be deleted. */
#define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint)
/* The original regno this ADDRESSOF was built for. */
#define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint)
/* The variable in the register we took the address of. */
#define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2))
#define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T))
/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
be decremented and possibly the label can be deleted. */
#define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx)
/* Once basic blocks are found in flow.c,
each CODE_LABEL starts a chain that goes through
all the LABEL_REFs that jump to that label.
The chain eventually winds up at the CODE_LABEL; it is circular. */
#define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx)
/* This is the field in the LABEL_REF through which the circular chain
of references to a particular label is linked.
This chain is set up in flow.c. */
#define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx)
/* Once basic blocks are found in flow.c,
Each LABEL_REF points to its containing instruction with this field. */
#define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx)
/* For a REG rtx, REGNO extracts the register number. */
#define REGNO(RTX) ((RTX)->fld[0].rtint)
/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
is the current function's return value. */
#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
#define REG_USERVAR_P(RTX) ((RTX)->volatil)
/* For a CONST_INT rtx, INTVAL extracts the integer. */
#define INTVAL(RTX) ((RTX)->fld[0].rtwint)
/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
SUBREG_WORD extracts the word-number. */
#define SUBREG_REG(RTX) ((RTX)->fld[0].rtx)
#define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint)
/* 1 if the REG contained in SUBREG_REG is already known to be
sign- or zero-extended from the mode of the SUBREG to the mode of
the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
extension.
When used as a LHS, is means that this extension must be done
when assigning to SUBREG_REG. */
#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
/* Access various components of an ASM_OPERANDS rtx. */
#define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0)
#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1)
#define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2)
#define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3)
#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4)
#define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N))
#define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3)
#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0)
#define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N)))
#define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5)
#define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6)
/* For a MEM rtx, 1 if it's a volatile reference.
Also in an ASM_OPERANDS rtx. */
#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
/* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero,
RTX may or may not refer to a field of an aggregate. */
#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
not refer to a scalar.*/
#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
/* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P
attributes from RHS to LHS. */
#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
(MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS))
/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
RTX. Otherwise, vice versa. Use this macro only when you are
*sure* that you know that the MEM is in a structure, or is a
scalar. VAL is evaluated only once. */
#define MEM_SET_IN_STRUCT_P(RTX, VAL) \
((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \
: (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1))
/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
set, and may alias anything. Otherwise, the MEM can only alias
MEMs in the same alias set. This value is set in a
language-dependent manner in the front-end, and should not be
altered in the back-end. These set numbers are tested for zero,
and compared for equality; they have no other significance. In
some front-ends, these numbers may correspond in some way to types,
or other language-level entities, but they need not, and the
back-end makes no such assumptions. */
#define MEM_ALIAS_SET(RTX) (XINT (RTX, 1))
/* For a LABEL_REF, 1 means that this reference is to a label outside the
loop containing the reference. */
#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
/* For a LABEL_REF, 1 means it is for a nonlocal label. */
/* Likewise in an EXPR_LIST for a REG_LABEL note. */
#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
/* For a CODE_LABEL, 1 means always consider this label to be needed. */
#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
/* For a REG, 1 means the register is used only in an exit test of a loop. */
#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
/* During sched, for an insn, 1 means that the insn must be scheduled together
with the preceding insn. */
#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
cost of the dependence link. The cost of executing an instruction
may vary based on how the results are used. LINK_COST_ZERO is 1 when
the cost through the link varies and is unchanged (i.e., the link has
zero additional cost). LINK_COST_FREE is 1 when the cost through the
link is zero (i.e., the link makes the cost free). In other cases,
the adjustment to the cost is recomputed each time it is needed. */
#define LINK_COST_ZERO(X) ((X)->jump)
#define LINK_COST_FREE(X) ((X)->call)
/* For a SET rtx, SET_DEST is the place that is set
and SET_SRC is the value it is set to. */
#define SET_DEST(RTX) ((RTX)->fld[0].rtx)
#define SET_SRC(RTX) ((RTX)->fld[1].rtx)
/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
#define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx)
#define TRAP_CODE(RTX) (RTX)->fld[1].rtx
/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
/* Flag in a SYMBOL_REF for machine-specific purposes. */
#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
/* 1 in a SYMBOL_REF if it represents a symbol which might have to change
if its inlined or unrolled. */
#define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
#define SYMBOL_REF_USED(RTX) ((RTX)->used)
/* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn
of the function that is not involved in copying parameters to
pseudo-registers. FIRST_PARM_INSN is the very first insn of
the function, including the parameter copying.
We keep this around in case we must splice
this function into the assembly code at the end of the file.
FIRST_LABELNO is the first label number used by the function (inclusive).
LAST_LABELNO is the last label used by the function (exclusive).
MAX_REGNUM is the largest pseudo-register used by that function.
FUNCTION_ARGS_SIZE is the size of the argument block in the stack.
POPS_ARGS is the number of bytes of input arguments popped by the function
STACK_SLOT_LIST is the list of stack slots.
FORCED_LABELS is the list of labels whose address was taken.
FUNCTION_FLAGS are where single-bit flags are saved.
OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list.
ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values
for the function arguments.
ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the
function.
INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and
INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays.
We want this to lay down like an INSN. The PREV_INSN field
is always NULL. The NEXT_INSN field always points to the
first function insn of the function being squirreled away. */
#define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx)
#define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx)
#define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint)
#define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint)
#define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint)
#define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint)
#define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint)
#define POPS_ARGS(RTX) ((RTX)->fld[9].rtint)
#define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx)
#define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx)
#define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint)
#define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint)
#define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec)
#define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx)
#define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec)
#define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr)
#define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr)
#define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec)
/* In FUNCTION_FLAGS we save some variables computed when emitting the code
for the function and which must be `or'ed into the current flag values when
insns from that function are being inlined. */
/* These ought to be an enum, but non-ANSI compilers don't like that. */
#define FUNCTION_FLAGS_CALLS_ALLOCA 01
#define FUNCTION_FLAGS_CALLS_SETJMP 02
#define FUNCTION_FLAGS_RETURNS_STRUCT 04
#define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010
#define FUNCTION_FLAGS_NEEDS_CONTEXT 020
#define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040
#define FUNCTION_FLAGS_RETURNS_POINTER 0100
#define FUNCTION_FLAGS_USES_CONST_POOL 0200
#define FUNCTION_FLAGS_CALLS_LONGJMP 0400
#define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000
#define FUNCTION_FLAGS_HAS_COMPUTED_JUMP 02000
/* Define a macro to look for REG_INC notes,
but save time on machines where they never exist. */
/* Don't continue this line--convex cc version 4.1 would lose. */
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
#define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
#else
#define FIND_REG_INC_NOTE(insn, reg) 0
#endif
/* Indicate whether the machine has any sort of auto increment addressing.
If not, we can avoid checking for REG_INC notes. */
/* Don't continue this line--convex cc version 4.1 would lose. */
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
#define AUTO_INC_DEC
#endif
#ifndef HAVE_PRE_INCREMENT
#define HAVE_PRE_INCREMENT 0
#endif
#ifndef HAVE_PRE_DECREMENT
#define HAVE_PRE_DECREMENT 0
#endif
#ifndef HAVE_POST_INCREMENT
#define HAVE_POST_INCREMENT 0
#endif
#ifndef HAVE_POST_DECREMENT
#define HAVE_POST_DECREMENT 0
#endif
/* Some architectures do not have complete pre/post increment/decrement
instruction sets, or only move some modes efficiently. These macros
allow us to tune autoincrement generation. */
#ifndef USE_LOAD_POST_INCREMENT
#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
#endif
#ifndef USE_LOAD_POST_DECREMENT
#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
#endif
#ifndef USE_LOAD_PRE_INCREMENT
#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
#endif
#ifndef USE_LOAD_PRE_DECREMENT
#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
#endif
#ifndef USE_STORE_POST_INCREMENT
#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
#endif
#ifndef USE_STORE_POST_DECREMENT
#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
#endif
#ifndef USE_STORE_PRE_INCREMENT
#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
#endif
#ifndef USE_STORE_PRE_DECREMENT
#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
#endif
/* Accessors for RANGE_INFO. */
/* For RANGE_{START,END} notes return the RANGE_START note. */
#define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0))
/* For RANGE_{START,END} notes return the RANGE_START note. */
#define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1))
/* For RANGE_{START,END} notes, return the vector containing the registers used
in the range. */
#define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2))
#define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N))
#define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2))
/* For RANGE_{START,END} notes, the number of calls within the range. */
#define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3))
/* For RANGE_{START,END} notes, the number of insns within the range. */
#define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4))
/* For RANGE_{START,END} notes, a unique # to identify this range. */
#define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5))
/* For RANGE_{START,END} notes, the basic block # the range starts with. */
#define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6))
/* For RANGE_{START,END} notes, the basic block # the range ends with. */
#define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7))
/* For RANGE_{START,END} notes, the loop depth the range is in. */
#define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8))
/* For RANGE_{START,END} notes, the bitmap of live registers at the start
of the range. */
#define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9))
/* For RANGE_{START,END} notes, the bitmap of live registers at the end
of the range. */
#define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10))
/* For RANGE_START notes, the marker # of the start of the range. */
#define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11))
/* For RANGE_START notes, the marker # of the end of the range. */
#define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12))
/* Original pseudo register # for a live range note. */
#define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0))
/* Pseudo register # original register is copied into or -1. */
#define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1))
/* How many times a register in a live range note was referenced. */
#define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2))
/* How many times a register in a live range note was set. */
#define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3))
/* How many times a register in a live range note died. */
#define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4))
/* Whether the original value is needed to be copied into the range register at
the start of the range. */
#define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5))
/* # of insns the register copy is live over. */
#define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6))
/* # of calls the register copy is live over. */
#define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7))
/* DECL_NODE pointer of the declaration if the register is a user defined
variable. */
#define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8))
/* BLOCK_NODE pointer to the block the variable is declared in if the
register is a user defined variable. */
#define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9))
/* EXPR_LIST of the distinct ranges a variable is in. */
#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
/* Block a variable is declared in. */
#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
/* # of distinct ranges a variable is in. */
#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
/* For a NOTE_INSN_LIVE note, the original basic block number. */
#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
/* Generally useful functions. */
/* The following functions accept a wide integer argument. Rather than
having to cast on every function call, we use a macro instead, that is
defined here and in tree.h. */
#ifndef exact_log2
#define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
#define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
#endif
extern int exact_log2_wide PROTO((unsigned HOST_WIDE_INT));
extern int floor_log2_wide PROTO((unsigned HOST_WIDE_INT));
/* In expmed.c */
extern int ceil_log2 PROTO((unsigned HOST_WIDE_INT));
#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
#define plus_constant_for_output(X,C) \
plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
/* In explow.c */
extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT));
extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT));
extern void optimize_save_area_alloca PROTO((rtx));
extern rtx gen_rtx PVPROTO((enum rtx_code,
enum machine_mode, ...));
extern rtvec gen_rtvec PVPROTO((int, ...));
#ifdef BUFSIZ
extern rtx read_rtx PROTO((FILE *));
#endif
extern char *oballoc PROTO((int));
extern char *permalloc PROTO((int));
extern rtx rtx_alloc PROTO((RTX_CODE));
extern rtvec rtvec_alloc PROTO((int));
extern rtx copy_rtx PROTO((rtx));
extern rtx copy_rtx_if_shared PROTO((rtx));
extern rtx copy_most_rtx PROTO((rtx, rtx));
extern rtx shallow_copy_rtx PROTO((rtx));
extern rtvec gen_rtvec_v PROTO((int, rtx *));
extern rtvec gen_rtvec_vv PROTO((int, rtunion *));
extern rtx gen_reg_rtx PROTO((enum machine_mode));
extern rtx gen_label_rtx PROTO((void));
extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int,
int, int, rtx, rtx, int, int,
rtvec, rtx,
rtvec, char *, char *, rtvec));
extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx));
extern rtx gen_lowpart PROTO((enum machine_mode, rtx));
extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx));
extern rtx gen_highpart PROTO((enum machine_mode, rtx));
extern rtx gen_realpart PROTO((enum machine_mode, rtx));
extern rtx gen_imagpart PROTO((enum machine_mode, rtx));
extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode));
extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode));
extern int subreg_lowpart_p PROTO((rtx));
extern rtx make_safe_from PROTO((rtx, rtx));
extern rtx convert_memory_address PROTO((enum machine_mode, rtx));
extern rtx memory_address PROTO((enum machine_mode, rtx));
extern rtx get_insns PROTO((void));
extern rtx get_last_insn PROTO((void));
extern rtx get_last_insn_anywhere PROTO((void));
extern void start_sequence PROTO((void));
extern void push_to_sequence PROTO((rtx));
extern void end_sequence PROTO((void));
extern rtx gen_sequence PROTO((void));
extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
extern rtx force_const_mem PROTO((enum machine_mode, rtx));
extern rtx force_reg PROTO((enum machine_mode, rtx));
extern rtx get_pool_constant PROTO((rtx));
extern enum machine_mode get_pool_mode PROTO((rtx));
extern int get_pool_offset PROTO((rtx));
extern rtx simplify_subtraction PROTO((rtx));
extern rtx assign_stack_local PROTO((enum machine_mode,
HOST_WIDE_INT, int));
extern rtx assign_stack_temp PROTO((enum machine_mode,
HOST_WIDE_INT, int));
extern rtx assign_temp PROTO((union tree_node *,
int, int, int));
extern rtx protect_from_queue PROTO((rtx, int));
extern void emit_queue PROTO((void));
extern rtx emit_move_insn PROTO((rtx, rtx));
extern rtx emit_insn_before PROTO((rtx, rtx));
extern rtx emit_jump_insn_before PROTO((rtx, rtx));
extern rtx emit_call_insn_before PROTO((rtx, rtx));
extern rtx emit_barrier_before PROTO((rtx));
extern rtx emit_label_before PROTO((rtx, rtx));
extern rtx emit_note_before PROTO((int, rtx));
extern rtx emit_insn_after PROTO((rtx, rtx));
extern rtx emit_jump_insn_after PROTO((rtx, rtx));
extern rtx emit_barrier_after PROTO((rtx));
extern rtx emit_label_after PROTO((rtx, rtx));
extern rtx emit_note_after PROTO((int, rtx));
extern rtx emit_line_note_after PROTO((char *, int, rtx));
extern rtx emit_insn PROTO((rtx));
extern rtx emit_insns PROTO((rtx));
extern rtx emit_insns_before PROTO((rtx, rtx));
extern rtx emit_insns_after PROTO((rtx, rtx));
extern rtx emit_jump_insn PROTO((rtx));
extern rtx emit_call_insn PROTO((rtx));
extern rtx emit_label PROTO((rtx));
extern rtx emit_barrier PROTO((void));
extern rtx emit_line_note PROTO((char *, int));
extern rtx emit_note PROTO((char *, int));
extern rtx emit_line_note_force PROTO((char *, int));
extern rtx make_insn_raw PROTO((rtx));
extern rtx previous_insn PROTO((rtx));
extern rtx next_insn PROTO((rtx));
extern rtx prev_nonnote_insn PROTO((rtx));
extern rtx next_nonnote_insn PROTO((rtx));
extern rtx prev_real_insn PROTO((rtx));
extern rtx next_real_insn PROTO((rtx));
extern rtx prev_active_insn PROTO((rtx));
extern rtx next_active_insn PROTO((rtx));
extern rtx prev_label PROTO((rtx));
extern rtx next_label PROTO((rtx));
extern rtx next_cc0_user PROTO((rtx));
extern rtx prev_cc0_setter PROTO((rtx));
extern rtx next_nondeleted_insn PROTO((rtx));
extern enum rtx_code reverse_condition PROTO((enum rtx_code));
extern enum rtx_code swap_condition PROTO((enum rtx_code));
extern enum rtx_code unsigned_condition PROTO((enum rtx_code));
extern enum rtx_code signed_condition PROTO((enum rtx_code));
extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode));
extern rtx squeeze_notes PROTO((rtx, rtx));
extern rtx delete_insn PROTO((rtx));
extern void delete_jump PROTO((rtx));
extern rtx get_label_before PROTO((rtx));
extern rtx get_label_after PROTO((rtx));
extern rtx follow_jumps PROTO((rtx));
extern rtx adj_offsettable_operand PROTO((rtx, int));
extern rtx try_split PROTO((rtx, rtx, int));
extern rtx split_insns PROTO((rtx, rtx));
extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode));
extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx));
extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
extern rtx gen_move_insn PROTO((rtx, rtx));
extern rtx gen_jump PROTO((rtx));
extern rtx gen_beq PROTO((rtx));
extern rtx gen_bge PROTO((rtx));
extern rtx gen_ble PROTO((rtx));
extern rtx gen_mem_addressof PROTO((rtx, union tree_node *));
extern rtx eliminate_constant_term PROTO((rtx, rtx *));
extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int));
extern enum machine_mode choose_hard_reg_mode PROTO((int, int));
extern void set_unique_reg_note PROTO((rtx, enum reg_note, rtx));
/* Functions in rtlanal.c */
extern int rtx_unstable_p PROTO((rtx));
extern int rtx_varies_p PROTO((rtx));
extern int rtx_addr_varies_p PROTO((rtx));
extern HOST_WIDE_INT get_integer_term PROTO((rtx));
extern rtx get_related_value PROTO((rtx));
extern int reg_mentioned_p PROTO((rtx, rtx));
extern int reg_referenced_p PROTO((rtx, rtx));
extern int reg_used_between_p PROTO((rtx, rtx, rtx));
extern int reg_referenced_between_p PROTO((rtx, rtx, rtx));
extern int reg_set_between_p PROTO((rtx, rtx, rtx));
extern int regs_set_between_p PROTO((rtx, rtx, rtx));
extern int modified_between_p PROTO((rtx, rtx, rtx));
extern int no_labels_between_p PROTO((rtx, rtx));
extern int no_jumps_between_p PROTO((rtx, rtx));
extern int modified_in_p PROTO((rtx, rtx));
extern int reg_set_p PROTO((rtx, rtx));
extern rtx single_set PROTO((rtx));
extern int multiple_sets PROTO((rtx));
extern rtx find_last_value PROTO((rtx, rtx *, rtx, int));
extern int refers_to_regno_p PROTO((int, int, rtx, rtx *));
extern int reg_overlap_mentioned_p PROTO((rtx, rtx));
extern void note_stores PROTO((rtx, void (*)(rtx, rtx)));
extern rtx reg_set_last PROTO((rtx, rtx));
extern int rtx_equal_p PROTO((rtx, rtx));
extern int dead_or_set_p PROTO((rtx, rtx));
extern int dead_or_set_regno_p PROTO((rtx, int));
extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx));
extern rtx find_regno_note PROTO((rtx, enum reg_note, int));
extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx));
extern int find_regno_fusage PROTO((rtx, enum rtx_code, int));
extern void remove_note PROTO((rtx, rtx));
extern int side_effects_p PROTO((rtx));
extern int volatile_refs_p PROTO((rtx));
extern int volatile_insn_p PROTO((rtx));
extern int may_trap_p PROTO((rtx));
extern int inequality_comparisons_p PROTO ((rtx));
extern rtx replace_rtx PROTO((rtx, rtx, rtx));
extern rtx replace_regs PROTO((rtx, rtx *, int, int));
extern int computed_jump_p PROTO((rtx));
typedef int (*rtx_function) PROTO((rtx *, void *));
extern int for_each_rtx PROTO((rtx *, rtx_function, void *));
extern rtx regno_use_in PROTO((int, rtx));
extern int auto_inc_p PROTO((rtx));
extern void remove_node_from_expr_list PROTO((rtx, rtx *));
extern int insns_safe_to_move_p PROTO((rtx, rtx, rtx *));
/* flow.c */
extern rtx find_use_as_address PROTO((rtx, rtx, HOST_WIDE_INT));
/* regclass.c */
/* Maximum number of parallel sets and clobbers in any insn in this fn.
Always at least 3, since the combiner could put that many togetherm
and we want this to remain correct for all the remaining passes. */
extern int max_parallel;
/* Free up register info memory. */
extern void free_reg_info PROTO((void));
/* recog.c */
extern int asm_noperands PROTO((rtx));
extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **,
const char **,
enum machine_mode *));
extern enum reg_class reg_preferred_class PROTO((int));
extern enum reg_class reg_alternate_class PROTO((int));
extern rtx get_first_nonparm_insn PROTO((void));
extern void split_block_insns PROTO((int, int));
extern void update_flow_info PROTO((rtx, rtx, rtx, rtx));
/* Standard pieces of rtx, to be substituted directly into things. */
#define pc_rtx (&global_rtl.pc_val)
#define cc0_rtx (&global_rtl.cc0_val)
#define MAX_SAVED_CONST_INT 64
extern struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
#define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT])
#define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1])
#define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2])
#define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1])
extern rtx const_true_rtx;
extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
same as VOIDmode. */
#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
/* Likewise, for the constants 1 and 2. */
#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
extern struct _global_rtl
{
struct rtx_def pc_val, cc0_val;
struct rtx_def stack_pointer_val, frame_pointer_val;
struct rtx_def hard_frame_pointer_val;
struct rtx_def arg_pointer_val;
struct rtx_def virtual_incoming_args_val;
struct rtx_def virtual_stack_vars_val;
struct rtx_def virtual_stack_dynamic_val;
struct rtx_def virtual_outgoing_args_val;
struct rtx_def virtual_cfa_val;
} global_rtl;
/* All references to certain hard regs, except those created
by allocating pseudo regs into them (when that's possible),
go through these unique rtx objects. */
#define stack_pointer_rtx (&global_rtl.stack_pointer_val)
#define frame_pointer_rtx (&global_rtl.frame_pointer_val)
extern rtx pic_offset_table_rtx;
extern rtx struct_value_rtx;
extern rtx struct_value_incoming_rtx;
extern rtx static_chain_rtx;
extern rtx static_chain_incoming_rtx;
extern rtx return_address_pointer_rtx;
/* Include the RTL generation functions. */
#ifndef NO_GENRTL_H
#include "genrtl.h"
#endif
/* There are some RTL codes that require special attention; the
generation functions included above do the raw handling. If you
add to this list, modify special_rtx in gengenrtl.c as well. You
should also modify gen_rtx to use the special function. */
extern rtx gen_rtx_CONST_DOUBLE PROTO((enum machine_mode, rtx,
HOST_WIDE_INT, HOST_WIDE_INT));
extern rtx gen_rtx_CONST_INT PROTO((enum machine_mode, HOST_WIDE_INT));
extern rtx gen_rtx_REG PROTO((enum machine_mode, int));
extern rtx gen_rtx_MEM PROTO((enum machine_mode, rtx));
/* We need the cast here to ensure that we get the same result both with
and without prototypes. */
#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
is used to represent the frame pointer. This is because the
hard frame pointer and the automatic variables are separated by an amount
that cannot be determined until after register allocation. We can assume
that in this case ELIMINABLE_REGS will be defined, one action of which
will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
#ifndef HARD_FRAME_POINTER_REGNUM
#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
#endif
/* For register elimination to work properly these hard_frame_pointer_rtx,
frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
the same register. */
#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
#define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val)
#else
#define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val)
#endif
#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
#define arg_pointer_rtx (&global_rtl.frame_pointer_val)
#else
#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
#define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val)
#else
#define arg_pointer_rtx (&global_rtl.arg_pointer_val)
#endif
#endif
/* Virtual registers are used during RTL generation to refer to locations into
the stack frame when the actual location isn't known until RTL generation
is complete. The routine instantiate_virtual_regs replaces these with
the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
a constant. */
#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
/* This points to the first word of the incoming arguments passed on the stack,
either by the caller or by the callee when pretending it was passed by the
caller. */
#define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val)
#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
variable on the stack. Otherwise, it points to the first variable on
the stack. */
#define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val)
#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
/* This points to the location of dynamically-allocated memory on the stack
immediately after the stack pointer has been adjusted by the amount
desired. */
#define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val)
#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
/* This points to the location in the stack at which outgoing arguments should
be written when the stack is pre-pushed (arguments pushed using push
insns always use sp). */
#define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val)
#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
/* This points to the Canonical Frame Address of the function. This
should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
but is calculated relative to the arg pointer for simplicity; the
frame pointer nor stack pointer are necessarily fixed relative to
the CFA until after reload. */
#define virtual_cfa_rtx (&global_rtl.virtual_cfa_val)
#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
extern rtx find_next_ref PROTO((rtx, rtx));
extern rtx *find_single_use PROTO((rtx, rtx, rtx *));
extern rtx output_constant_def PROTO((union tree_node *));
extern rtx immed_real_const PROTO((union tree_node *));
extern union tree_node *make_tree PROTO((union tree_node *, rtx));
/* Define a default value for STORE_FLAG_VALUE. */
#ifndef STORE_FLAG_VALUE
#define STORE_FLAG_VALUE 1
#endif
/* Nonzero after the second flow pass has completed.
Set to 1 or 0 by toplev.c */
extern int flow2_completed;
/* Nonzero after end of reload pass.
Set to 1 or 0 by reload1.c. */
extern int reload_completed;
/* Set to 1 while reload_as_needed is operating.
Required by some machines to handle any generated moves differently. */
extern int reload_in_progress;
/* If this is nonzero, we do not bother generating VOLATILE
around volatile memory references, and we are willing to
output indirect addresses. If cse is to follow, we reject
indirect addresses so a useful potential cse is generated;
if it is used only once, instruction combination will produce
the same indirect address eventually. */
extern int cse_not_expected;
/* Set to nonzero before life analysis to indicate that it is unsafe to
generate any new pseudo registers. */
extern int no_new_pseudos;
/* Indexed by pseudo register number, gives the rtx for that pseudo.
Allocated in parallel with regno_pointer_flag. */
extern rtx *regno_reg_rtx;
/* Vector indexed by regno; contain the alignment in bytes and type
pointed to for a register that contains a pointer, if known. */
extern char *regno_pointer_align;
#define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO]
/* Translates rtx code to tree code, for those codes needed by
REAL_ARITHMETIC. The function returns an int because the caller may not
know what `enum tree_code' means. */
extern int rtx_to_tree_code PROTO((enum rtx_code));
/* In tree.c */
extern void obfree PROTO ((char *));
struct obstack;
extern void gcc_obstack_init PROTO ((struct obstack *));
extern void pop_obstacks PROTO ((void));
extern void push_obstacks PROTO ((struct obstack *,
struct obstack *));
#ifdef BUFSIZ
extern int read_skip_spaces PROTO ((FILE *));
#endif
/* In cse.c */
struct cse_basic_block_data;
extern int rtx_cost PROTO ((rtx, enum rtx_code));
extern void delete_trivially_dead_insns PROTO ((rtx, int));
#ifdef BUFSIZ
extern int cse_main PROTO ((rtx, int, int, FILE *));
#endif
extern void cse_end_of_basic_block PROTO ((rtx,
struct cse_basic_block_data *,
int, int, int));
/* In jump.c */
extern int comparison_dominates_p PROTO ((enum rtx_code, enum rtx_code));
extern int condjump_p PROTO ((rtx));
extern rtx condjump_label PROTO ((rtx));
extern int simplejump_p PROTO ((rtx));
extern int returnjump_p PROTO ((rtx));
extern int sets_cc0_p PROTO ((rtx));
extern int invert_jump PROTO ((rtx, rtx));
extern int rtx_renumbered_equal_p PROTO ((rtx, rtx));
extern int true_regnum PROTO ((rtx));
extern int redirect_jump PROTO ((rtx, rtx));
extern void jump_optimize PROTO ((rtx, int, int, int));
extern void rebuild_jump_labels PROTO ((rtx));
extern void thread_jumps PROTO ((rtx, int, int));
extern int redirect_exp PROTO ((rtx *, rtx, rtx, rtx));
extern int rtx_equal_for_thread_p PROTO ((rtx, rtx, rtx));
extern int invert_exp PROTO ((rtx, rtx));
extern int can_reverse_comparison_p PROTO ((rtx, rtx));
extern void delete_for_peephole PROTO ((rtx, rtx));
extern int condjump_in_parallel_p PROTO ((rtx));
/* Flags for jump_optimize() */
#define JUMP_CROSS_JUMP 1
#define JUMP_NOOP_MOVES 1
#define JUMP_AFTER_REGSCAN 1
/* In emit-rtl.c. */
extern int max_reg_num PROTO ((void));
extern int max_label_num PROTO ((void));
extern int get_first_label_num PROTO ((void));
extern void delete_insns_since PROTO ((rtx));
extern void mark_reg_pointer PROTO ((rtx, int));
extern void mark_user_reg PROTO ((rtx));
extern void reset_used_flags PROTO ((rtx));
extern void reorder_insns PROTO ((rtx, rtx, rtx));
extern int get_max_uid PROTO ((void));
extern int in_sequence_p PROTO ((void));
extern void force_next_line_note PROTO ((void));
extern void init_emit PROTO ((void));
extern void init_emit_once PROTO ((int));
extern void push_topmost_sequence PROTO ((void));
extern void pop_topmost_sequence PROTO ((void));
extern int subreg_realpart_p PROTO ((rtx));
extern void reverse_comparison PROTO ((rtx));
extern void set_new_first_and_last_insn PROTO ((rtx, rtx));
extern void set_new_first_and_last_label_num PROTO ((int, int));
extern void unshare_all_rtl_again PROTO ((rtx));
extern void set_last_insn PROTO ((rtx));
extern void link_cc0_insns PROTO ((rtx));
extern void add_insn PROTO ((rtx));
extern void add_insn_before PROTO ((rtx, rtx));
extern void add_insn_after PROTO ((rtx, rtx));
extern void remove_insn PROTO ((rtx));
extern void reorder_insns_with_line_notes PROTO ((rtx, rtx, rtx));
extern void emit_insn_after_with_line_notes PROTO ((rtx, rtx, rtx));
extern enum rtx_code classify_insn PROTO ((rtx));
extern void init_virtual_regs PROTO ((void));
extern rtx emit PROTO ((rtx));
/* Query and clear/ restore no_line_numbers. This is used by the
switch / case handling in stmt.c to give proper line numbers in
warnings about unreachable code. */
int force_line_numbers PROTO((void));
void restore_line_number_status PROTO((int old_value));
/* In insn-emit.c */
extern void add_clobbers PROTO ((rtx, int));
/* In combine.c */
extern void combine_instructions PROTO ((rtx, int));
extern int extended_count PROTO ((rtx, enum machine_mode, int));
extern rtx remove_death PROTO ((int, rtx));
#ifdef BUFSIZ
extern void dump_combine_stats PROTO ((FILE *));
extern void dump_combine_total_stats PROTO ((FILE *));
#endif
/* In sched.c. */
#ifdef BUFSIZ
extern void schedule_insns PROTO ((FILE *));
#endif
#ifdef HAIFA
extern void fix_sched_param PROTO ((char *, char *));
#endif
/* In print-rtl.c */
extern void debug_rtx PROTO ((rtx));
extern void debug_rtx_list PROTO ((rtx, int));
extern rtx debug_rtx_find PROTO ((rtx, int));
#ifdef BUFSIZ
extern void print_rtl PROTO ((FILE *, rtx));
extern int print_rtl_single PROTO ((FILE *, rtx));
extern void print_inline_rtx PROTO ((FILE *, rtx, int));
#endif
/* In loop.c */
extern void init_loop PROTO ((void));
extern rtx libcall_other_reg PROTO ((rtx, rtx));
#ifdef BUFSIZ
extern void loop_optimize PROTO ((rtx, FILE *, int, int));
#endif
extern void record_excess_regs PROTO ((rtx, rtx, rtx *));
/* In function.c */
extern void reposition_prologue_and_epilogue_notes PROTO ((rtx));
extern void thread_prologue_and_epilogue_insns PROTO ((rtx));
extern void use_variable PROTO ((rtx));
extern HOST_WIDE_INT get_frame_size PROTO ((void));
extern void preserve_rtl_expr_result PROTO ((rtx));
extern void mark_temp_addr_taken PROTO ((rtx));
extern void update_temp_slot_address PROTO ((rtx, rtx));
extern void use_variable_after PROTO ((rtx, rtx));
extern void purge_addressof PROTO ((rtx));
/* In reload.c */
extern int operands_match_p PROTO ((rtx, rtx));
extern int safe_from_earlyclobber PROTO ((rtx, rtx));
/* In stmt.c */
extern void expand_null_return PROTO((void));
extern void emit_jump PROTO ((rtx));
extern int preserve_subexpressions_p PROTO ((void));
/* List (chain of EXPR_LIST) of labels heading the current handlers for
nonlocal gotos. */
extern rtx nonlocal_goto_handler_labels;
/* In expr.c */
extern void init_expr_once PROTO ((void));
extern void move_by_pieces PROTO ((rtx, rtx, int, int));
/* In stupid.c */
#ifdef BUFSIZ
extern void stupid_life_analysis PROTO ((rtx, int, FILE *));
#endif
/* In flow.c */
extern void allocate_bb_life_data PROTO ((void));
extern void allocate_reg_life_data PROTO ((void));
extern void recompute_reg_usage PROTO ((rtx, int));
#ifdef BUFSIZ
extern void dump_flow_info PROTO ((FILE *));
#endif
extern void free_bb_mem PROTO ((void));
/* In expmed.c */
extern void init_expmed PROTO ((void));
extern void expand_inc PROTO ((rtx, rtx));
extern void expand_dec PROTO ((rtx, rtx));
extern rtx expand_mult_highpart PROTO ((enum machine_mode, rtx,
unsigned HOST_WIDE_INT, rtx,
int, int));
/* In gcse.c */
#ifdef BUFSIZ
extern int gcse_main PROTO ((rtx, FILE *));
#endif
/* In global.c */
extern void mark_elimination PROTO ((int, int));
#ifdef BUFSIZ
extern int global_alloc PROTO ((FILE *));
extern void dump_global_regs PROTO ((FILE *));
#endif
#ifdef HARD_CONST
extern void retry_global_alloc PROTO ((int, HARD_REG_SET));
#endif
/* In regclass.c */
extern int reg_classes_intersect_p PROTO ((enum reg_class, enum reg_class));
extern int reg_class_subset_p PROTO ((enum reg_class, enum reg_class));
extern void globalize_reg PROTO ((int));
extern void init_regs PROTO ((void));
extern void init_reg_sets PROTO ((void));
extern void regset_release_memory PROTO ((void));
extern void regclass_init PROTO ((void));
extern void regclass PROTO ((rtx, int));
extern void reg_scan PROTO ((rtx, int, int));
extern void reg_scan_update PROTO ((rtx, rtx, int));
extern void fix_register PROTO ((char *, int, int));
/* In regmove.c */
#ifdef BUFSIZ
extern void regmove_optimize PROTO ((rtx, int, FILE *));
#endif
/* In reorg.c */
#ifdef BUFSIZ
extern void dbr_schedule PROTO ((rtx, FILE *));
#endif
/* In optabs.c */
extern void init_optabs PROTO ((void));
/* In local-alloc.c */
#ifdef BUFSIZ
extern void dump_local_alloc PROTO ((FILE *));
#endif
extern int local_alloc PROTO ((void));
extern int function_invariant_p PROTO ((rtx));
/* In reload1.c */
extern void reload_cse_regs PROTO ((rtx));
extern void init_reload PROTO ((void));
extern void mark_home_live PROTO ((int));
#ifdef BUFSIZ
extern int reload PROTO ((rtx, int, FILE *));
#endif
/* In caller-save.c */
extern void init_caller_save PROTO ((void));
/* In profile.c */
extern void init_branch_prob PROTO ((const char *));
#ifdef BUFSIZ
extern void branch_prob PROTO ((rtx, FILE *));
extern void end_branch_prob PROTO ((FILE *));
#endif
extern void output_func_start_profiler PROTO ((void));
/* In reg-stack.c */
#ifdef BUFSIZ
extern void reg_to_stack PROTO ((rtx, FILE *));
#endif
extern int stack_regs_mentioned_p PROTO ((rtx));
/* In fold-const.c */
extern int add_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT *, HOST_WIDE_INT *));
extern int neg_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT *, HOST_WIDE_INT *));
extern int mul_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT *, HOST_WIDE_INT *));
extern void lshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, int, HOST_WIDE_INT *,
HOST_WIDE_INT *, int));
extern void rshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, int,
HOST_WIDE_INT *, HOST_WIDE_INT *, int));
extern void lrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, int, HOST_WIDE_INT *,
HOST_WIDE_INT *));
extern void rrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
HOST_WIDE_INT, int, HOST_WIDE_INT *,
HOST_WIDE_INT *));
/* In calls.c */
/* Emit library call. */
extern void emit_library_call PVPROTO ((rtx, int, enum machine_mode,
int, ...));
extern rtx emit_library_call_value PVPROTO((rtx, rtx, int,
enum machine_mode,
int, ...));
/* In unroll.c */
extern int set_dominates_use PROTO ((int, int, int, rtx, rtx));
/* In varasm.c */
extern void bss_section PROTO ((void));
extern int in_data_section PROTO ((void));
extern int supports_one_only PROTO ((void));
/* In rtl.c */
extern void init_rtl PROTO ((void));
extern void rtx_free PROTO ((rtx));
/* In alias.c */
extern int true_dependence PROTO ((rtx, enum machine_mode, rtx,
int (*)(rtx)));
extern int read_dependence PROTO ((rtx, rtx));
extern int anti_dependence PROTO ((rtx, rtx));
extern int output_dependence PROTO ((rtx, rtx));
extern void init_alias_once PROTO ((void));
extern void init_alias_analysis PROTO ((void));
extern void end_alias_analysis PROTO ((void));
extern void record_base_value PROTO ((int, rtx, int));
extern void record_alias_subset PROTO ((int, int));
extern rtx addr_side_effect_eval PROTO ((rtx, int, int));
#ifdef STACK_REGS
extern int stack_regs_mentioned PROTO((rtx insn));
#endif
#endif /* _RTL_H */
|