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1 280 jeremybenn
/* Register Transfer Language (RTL) definitions for GCC
2
   Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3
   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4
   Free Software Foundation, Inc.
5
 
6
This file is part of GCC.
7
 
8
GCC is free software; you can redistribute it and/or modify it under
9
the terms of the GNU General Public License as published by the Free
10
Software Foundation; either version 3, or (at your option) any later
11
version.
12
 
13
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14
WARRANTY; without even the implied warranty of MERCHANTABILITY or
15
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16
for more details.
17
 
18
You should have received a copy of the GNU General Public License
19
along with GCC; see the file COPYING3.  If not see
20
<http://www.gnu.org/licenses/>.  */
21
 
22
#ifndef GCC_RTL_H
23
#define GCC_RTL_H
24
 
25
#include "statistics.h"
26
#include "machmode.h"
27
#include "input.h"
28
#include "real.h"
29
#include "vec.h"
30
#include "fixed-value.h"
31
#include "alias.h"
32
 
33
#undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
34
#undef FLOAT /* Likewise.  */
35
#undef ABS /* Likewise.  */
36
#undef PC /* Likewise.  */
37
 
38
/* Value used by some passes to "recognize" noop moves as valid
39
 instructions.  */
40
#define NOOP_MOVE_INSN_CODE     INT_MAX
41
 
42
/* Register Transfer Language EXPRESSIONS CODES */
43
 
44
#define RTX_CODE        enum rtx_code
45
enum rtx_code  {
46
 
47
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   ENUM ,
48
#include "rtl.def"              /* rtl expressions are documented here */
49
#undef DEF_RTL_EXPR
50
 
51
  LAST_AND_UNUSED_RTX_CODE};    /* A convenient way to get a value for
52
                                   NUM_RTX_CODE.
53
                                   Assumes default enum value assignment.  */
54
 
55
#define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
56
                                /* The cast here, saves many elsewhere.  */
57
 
58
/* Register Transfer Language EXPRESSIONS CODE CLASSES */
59
 
60
enum rtx_class  {
61
  /* We check bit 0-1 of some rtx class codes in the predicates below.  */
62
 
63
  /* Bit 0 = comparison if 0, arithmetic is 1
64
     Bit 1 = 1 if commutative.  */
65
  RTX_COMPARE,          /* 0 */
66
  RTX_COMM_COMPARE,
67
  RTX_BIN_ARITH,
68
  RTX_COMM_ARITH,
69
 
70
  /* Must follow the four preceding values.  */
71
  RTX_UNARY,            /* 4 */
72
 
73
  RTX_EXTRA,
74
  RTX_MATCH,
75
  RTX_INSN,
76
 
77
  /* Bit 0 = 1 if constant.  */
78
  RTX_OBJ,              /* 8 */
79
  RTX_CONST_OBJ,
80
 
81
  RTX_TERNARY,
82
  RTX_BITFIELD_OPS,
83
  RTX_AUTOINC
84
};
85
 
86
#define RTX_OBJ_MASK (~1)
87
#define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
88
#define RTX_COMPARE_MASK (~1)
89
#define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
90
#define RTX_ARITHMETIC_MASK (~1)
91
#define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
92
#define RTX_BINARY_MASK (~3)
93
#define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
94
#define RTX_COMMUTATIVE_MASK (~2)
95
#define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
96
#define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
97
 
98
extern const unsigned char rtx_length[NUM_RTX_CODE];
99
#define GET_RTX_LENGTH(CODE)            (rtx_length[(int) (CODE)])
100
 
101
extern const char * const rtx_name[NUM_RTX_CODE];
102
#define GET_RTX_NAME(CODE)              (rtx_name[(int) (CODE)])
103
 
104
extern const char * const rtx_format[NUM_RTX_CODE];
105
#define GET_RTX_FORMAT(CODE)            (rtx_format[(int) (CODE)])
106
 
107
extern const enum rtx_class rtx_class[NUM_RTX_CODE];
108
#define GET_RTX_CLASS(CODE)             (rtx_class[(int) (CODE)])
109
 
110
extern const unsigned char rtx_code_size[NUM_RTX_CODE];
111
extern const unsigned char rtx_next[NUM_RTX_CODE];
112
 
113
/* The flags and bitfields of an ADDR_DIFF_VEC.  BASE is the base label
114
   relative to which the offsets are calculated, as explained in rtl.def.  */
115
typedef struct
116
{
117
  /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118
  unsigned min_align: 8;
119
  /* Flags: */
120
  unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC.  */
121
  unsigned min_after_vec: 1;  /* minimum address target label is
122
                                 after the ADDR_DIFF_VEC.  */
123
  unsigned max_after_vec: 1;  /* maximum address target label is
124
                                 after the ADDR_DIFF_VEC.  */
125
  unsigned min_after_base: 1; /* minimum address target label is
126
                                 after BASE.  */
127
  unsigned max_after_base: 1; /* maximum address target label is
128
                                 after BASE.  */
129
  /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130
  unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned.  */
131
  unsigned : 2;
132
  unsigned scale : 8;
133
} addr_diff_vec_flags;
134
 
135
/* Structure used to describe the attributes of a MEM.  These are hashed
136
   so MEMs that the same attributes share a data structure.  This means
137
   they cannot be modified in place.  If any element is nonzero, it means
138
   the value of the corresponding attribute is unknown.  */
139
/* ALIGN and SIZE are the alignment and size of the MEM itself,
140
   while EXPR can describe a larger underlying object, which might have a
141
   stricter alignment; OFFSET is the offset of the MEM within that object.  */
142
typedef struct GTY(()) mem_attrs
143
{
144
  tree expr;                    /* expr corresponding to MEM.  */
145
  rtx offset;                   /* Offset from start of DECL, as CONST_INT.  */
146
  rtx size;                     /* Size in bytes, as a CONST_INT.  */
147
  alias_set_type alias;         /* Memory alias set.  */
148
  unsigned int align;           /* Alignment of MEM in bits.  */
149
  unsigned char addrspace;      /* Address space (0 for generic).  */
150
} mem_attrs;
151
 
152
/* Structure used to describe the attributes of a REG in similar way as
153
   mem_attrs does for MEM above.  Note that the OFFSET field is calculated
154
   in the same way as for mem_attrs, rather than in the same way as a
155
   SUBREG_BYTE.  For example, if a big-endian target stores a byte
156
   object in the low part of a 4-byte register, the OFFSET field
157
   will be -3 rather than 0.  */
158
 
159
typedef struct GTY(()) reg_attrs {
160
  tree decl;                    /* decl corresponding to REG.  */
161
  HOST_WIDE_INT offset;         /* Offset from start of DECL.  */
162
} reg_attrs;
163
 
164
/* Common union for an element of an rtx.  */
165
 
166
union rtunion_def
167
{
168
  int rt_int;
169
  unsigned int rt_uint;
170
  const char *rt_str;
171
  rtx rt_rtx;
172
  rtvec rt_rtvec;
173
  enum machine_mode rt_type;
174
  addr_diff_vec_flags rt_addr_diff_vec_flags;
175
  struct cselib_val_struct *rt_cselib;
176
  struct bitmap_head_def *rt_bit;
177
  tree rt_tree;
178
  struct basic_block_def *rt_bb;
179
  mem_attrs *rt_mem;
180
  reg_attrs *rt_reg;
181
  struct constant_descriptor_rtx *rt_constant;
182
};
183
typedef union rtunion_def rtunion;
184
 
185
/* This structure remembers the position of a SYMBOL_REF within an
186
   object_block structure.  A SYMBOL_REF only provides this information
187
   if SYMBOL_REF_HAS_BLOCK_INFO_P is true.  */
188
struct GTY(()) block_symbol {
189
  /* The usual SYMBOL_REF fields.  */
190
  rtunion GTY ((skip)) fld[3];
191
 
192
  /* The block that contains this object.  */
193
  struct object_block *block;
194
 
195
  /* The offset of this object from the start of its block.  It is negative
196
     if the symbol has not yet been assigned an offset.  */
197
  HOST_WIDE_INT offset;
198
};
199
 
200
DEF_VEC_P(rtx);
201
DEF_VEC_ALLOC_P(rtx,heap);
202
DEF_VEC_ALLOC_P(rtx,gc);
203
 
204
/* Describes a group of objects that are to be placed together in such
205
   a way that their relative positions are known.  */
206
struct GTY(()) object_block {
207
  /* The section in which these objects should be placed.  */
208
  section *sect;
209
 
210
  /* The alignment of the first object, measured in bits.  */
211
  unsigned int alignment;
212
 
213
  /* The total size of the objects, measured in bytes.  */
214
  HOST_WIDE_INT size;
215
 
216
  /* The SYMBOL_REFs for each object.  The vector is sorted in
217
     order of increasing offset and the following conditions will
218
     hold for each element X:
219
 
220
         SYMBOL_REF_HAS_BLOCK_INFO_P (X)
221
         !SYMBOL_REF_ANCHOR_P (X)
222
         SYMBOL_REF_BLOCK (X) == [address of this structure]
223
         SYMBOL_REF_BLOCK_OFFSET (X) >= 0.  */
224
  VEC(rtx,gc) *objects;
225
 
226
  /* All the anchor SYMBOL_REFs used to address these objects, sorted
227
     in order of increasing offset, and then increasing TLS model.
228
     The following conditions will hold for each element X in this vector:
229
 
230
         SYMBOL_REF_HAS_BLOCK_INFO_P (X)
231
         SYMBOL_REF_ANCHOR_P (X)
232
         SYMBOL_REF_BLOCK (X) == [address of this structure]
233
         SYMBOL_REF_BLOCK_OFFSET (X) >= 0.  */
234
  VEC(rtx,gc) *anchors;
235
};
236
 
237
/* RTL expression ("rtx").  */
238
 
239
struct GTY((chain_next ("RTX_NEXT (&%h)"),
240
                    chain_prev ("RTX_PREV (&%h)"))) rtx_def {
241
  /* The kind of expression this is.  */
242
  ENUM_BITFIELD(rtx_code) code: 16;
243
 
244
  /* The kind of value the expression has.  */
245
  ENUM_BITFIELD(machine_mode) mode : 8;
246
 
247
  /* 1 in a MEM if we should keep the alias set for this mem unchanged
248
     when we access a component.
249
     1 in a CALL_INSN if it is a sibling call.
250
     1 in a SET that is for a return.
251
     In a CODE_LABEL, part of the two-bit alternate entry field.  */
252
  unsigned int jump : 1;
253
  /* In a CODE_LABEL, part of the two-bit alternate entry field.
254
     1 in a MEM if it cannot trap.
255
     1 in a CALL_INSN logically equivalent to
256
       ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
257
  unsigned int call : 1;
258
  /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
259
     1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
260
     1 in a SYMBOL_REF if it addresses something in the per-function
261
     constants pool.
262
     1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
263
     1 in a NOTE, or EXPR_LIST for a const call.
264
     1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch.  */
265
  unsigned int unchanging : 1;
266
  /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
267
     1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
268
     if it has been deleted.
269
     1 in a REG expression if corresponds to a variable declared by the user,
270
 
271
     1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
272
     1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
273
     non-local label.
274
     In a SYMBOL_REF, this flag is used for machine-specific purposes.
275
     In a PREFETCH, this flag indicates that it should be considered a scheduling
276
     barrier.  */
277
  unsigned int volatil : 1;
278
  /* 1 in a MEM referring to a field of an aggregate.
279
 
280
     1 if it was the result of a . or -> operator (on a struct) in C.
281
     1 in a REG if the register is used only in exit code a loop.
282
     1 in a SUBREG expression if was generated from a variable with a
283
     promoted mode.
284
     1 in a CODE_LABEL if the label is used for nonlocal gotos
285
     and must not be deleted even if its count is zero.
286
     1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
287
     together with the preceding insn.  Valid only within sched.
288
     1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
289
     from the target of a branch.  Valid from reorg until end of compilation;
290
     cleared before used.  */
291
  unsigned int in_struct : 1;
292
  /* At the end of RTL generation, 1 if this rtx is used.  This is used for
293
     copying shared structure.  See `unshare_all_rtl'.
294
     In a REG, this is not needed for that purpose, and used instead
295
     in `leaf_renumber_regs_insn'.
296
     1 in a SYMBOL_REF, means that emit_library_call
297
     has used it as the function.  */
298
  unsigned int used : 1;
299
  /* 1 in an INSN or a SET if this rtx is related to the call frame,
300
     either changing how we compute the frame address or saving and
301
     restoring registers in the prologue and epilogue.
302
     1 in a REG or MEM if it is a pointer.
303
     1 in a SYMBOL_REF if it addresses something in the per-function
304
     constant string pool.  */
305
  unsigned frame_related : 1;
306
  /* 1 in a REG or PARALLEL that is the current function's return value.
307
     1 in a MEM if it refers to a scalar.
308
     1 in a SYMBOL_REF for a weak symbol.
309
     1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
310
  unsigned return_val : 1;
311
 
312
  /* The first element of the operands of this rtx.
313
     The number of operands and their types are controlled
314
     by the `code' field, according to rtl.def.  */
315
  union u {
316
    rtunion fld[1];
317
    HOST_WIDE_INT hwint[1];
318
    struct block_symbol block_sym;
319
    struct real_value rv;
320
    struct fixed_value fv;
321
  } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
322
};
323
 
324
/* The size in bytes of an rtx header (code, mode and flags).  */
325
#define RTX_HDR_SIZE offsetof (struct rtx_def, u)
326
 
327
/* The size in bytes of an rtx with code CODE.  */
328
#define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
329
 
330
#define NULL_RTX (rtx) 0
331
 
332
/* The "next" and "previous" RTX, relative to this one.  */
333
 
334
#define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL                 \
335
                     : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
336
 
337
/* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
338
 */
339
#define RTX_PREV(X) ((INSN_P (X)                        \
340
                      || NOTE_P (X)                     \
341
                      || BARRIER_P (X)                  \
342
                      || LABEL_P (X))                   \
343
                     && PREV_INSN (X) != NULL           \
344
                     && NEXT_INSN (PREV_INSN (X)) == X  \
345
                     ? PREV_INSN (X) : NULL)
346
 
347
/* Define macros to access the `code' field of the rtx.  */
348
 
349
#define GET_CODE(RTX)       ((enum rtx_code) (RTX)->code)
350
#define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
351
 
352
#define GET_MODE(RTX)       ((enum machine_mode) (RTX)->mode)
353
#define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
354
 
355
/* RTL vector.  These appear inside RTX's when there is a need
356
   for a variable number of things.  The principle use is inside
357
   PARALLEL expressions.  */
358
 
359
struct GTY(()) rtvec_def {
360
  int num_elem;         /* number of elements */
361
  rtx GTY ((length ("%h.num_elem"))) elem[1];
362
};
363
 
364
#define NULL_RTVEC (rtvec) 0
365
 
366
#define GET_NUM_ELEM(RTVEC)             ((RTVEC)->num_elem)
367
#define PUT_NUM_ELEM(RTVEC, NUM)        ((RTVEC)->num_elem = (NUM))
368
 
369
/* Predicate yielding nonzero iff X is an rtx for a register.  */
370
#define REG_P(X) (GET_CODE (X) == REG)
371
 
372
/* Predicate yielding nonzero iff X is an rtx for a memory location.  */
373
#define MEM_P(X) (GET_CODE (X) == MEM)
374
 
375
/* Predicate yielding nonzero iff X is an rtx for a constant integer.  */
376
#define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
377
 
378
/* Predicate yielding nonzero iff X is a label insn.  */
379
#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
380
 
381
/* Predicate yielding nonzero iff X is a jump insn.  */
382
#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
383
 
384
/* Predicate yielding nonzero iff X is a call insn.  */
385
#define CALL_P(X) (GET_CODE (X) == CALL_INSN)
386
 
387
/* Predicate yielding nonzero iff X is an insn that cannot jump.  */
388
#define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
389
 
390
/* Predicate yielding nonzero iff X is a debug note/insn.  */
391
#define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
392
 
393
/* Predicate yielding nonzero iff X is an insn that is not a debug insn.  */
394
#define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
395
 
396
/* Nonzero if DEBUG_INSN_P may possibly hold.  */
397
#define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
398
 
399
/* Predicate yielding nonzero iff X is a real insn.  */
400
#define INSN_P(X) \
401
  (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
402
 
403
/* Predicate yielding nonzero iff X is a note insn.  */
404
#define NOTE_P(X) (GET_CODE (X) == NOTE)
405
 
406
/* Predicate yielding nonzero iff X is a barrier insn.  */
407
#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
408
 
409
/* Predicate yielding nonzero iff X is a data for a jump table.  */
410
#define JUMP_TABLE_DATA_P(INSN) \
411
  (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
412
                     GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
413
 
414
/* 1 if X is a unary operator.  */
415
 
416
#define UNARY_P(X)   \
417
  (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
418
 
419
/* 1 if X is a binary operator.  */
420
 
421
#define BINARY_P(X)   \
422
  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
423
 
424
/* 1 if X is an arithmetic operator.  */
425
 
426
#define ARITHMETIC_P(X)   \
427
  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK)                 \
428
    == RTX_ARITHMETIC_RESULT)
429
 
430
/* 1 if X is an arithmetic operator.  */
431
 
432
#define COMMUTATIVE_ARITH_P(X)   \
433
  (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
434
 
435
/* 1 if X is a commutative arithmetic operator or a comparison operator.
436
   These two are sometimes selected together because it is possible to
437
   swap the two operands.  */
438
 
439
#define SWAPPABLE_OPERANDS_P(X)   \
440
  ((1 << GET_RTX_CLASS (GET_CODE (X)))                                  \
441
    & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE)                  \
442
       | (1 << RTX_COMPARE)))
443
 
444
/* 1 if X is a non-commutative operator.  */
445
 
446
#define NON_COMMUTATIVE_P(X)   \
447
  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK)                \
448
    == RTX_NON_COMMUTATIVE_RESULT)
449
 
450
/* 1 if X is a commutative operator on integers.  */
451
 
452
#define COMMUTATIVE_P(X)   \
453
  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK)                \
454
    == RTX_COMMUTATIVE_RESULT)
455
 
456
/* 1 if X is a relational operator.  */
457
 
458
#define COMPARISON_P(X)   \
459
  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
460
 
461
/* 1 if X is a constant value that is an integer.  */
462
 
463
#define CONSTANT_P(X)   \
464
  (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
465
 
466
/* 1 if X can be used to represent an object.  */
467
#define OBJECT_P(X)                                                     \
468
  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
469
 
470
/* General accessor macros for accessing the fields of an rtx.  */
471
 
472
#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
473
/* The bit with a star outside the statement expr and an & inside is
474
   so that N can be evaluated only once.  */
475
#define RTL_CHECK1(RTX, N, C1) __extension__                            \
476
(*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
477
     const enum rtx_code _code = GET_CODE (_rtx);                       \
478
     if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                 \
479
       rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
480
                                __FUNCTION__);                          \
481
     if (GET_RTX_FORMAT(_code)[_n] != C1)                               \
482
       rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__,        \
483
                               __FUNCTION__);                           \
484
     &_rtx->u.fld[_n]; }))
485
 
486
#define RTL_CHECK2(RTX, N, C1, C2) __extension__                        \
487
(*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
488
     const enum rtx_code _code = GET_CODE (_rtx);                       \
489
     if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                 \
490
       rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
491
                                __FUNCTION__);                          \
492
     if (GET_RTX_FORMAT(_code)[_n] != C1                                \
493
         && GET_RTX_FORMAT(_code)[_n] != C2)                            \
494
       rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__,    \
495
                               __FUNCTION__);                           \
496
     &_rtx->u.fld[_n]; }))
497
 
498
#define RTL_CHECKC1(RTX, N, C) __extension__                            \
499
(*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
500
     if (GET_CODE (_rtx) != (C))                                        \
501
       rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__,           \
502
                               __FUNCTION__);                           \
503
     &_rtx->u.fld[_n]; }))
504
 
505
#define RTL_CHECKC2(RTX, N, C1, C2) __extension__                       \
506
(*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
507
     const enum rtx_code _code = GET_CODE (_rtx);                       \
508
     if (_code != (C1) && _code != (C2))                                \
509
       rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__,    \
510
                               __FUNCTION__); \
511
     &_rtx->u.fld[_n]; }))
512
 
513
#define RTVEC_ELT(RTVEC, I) __extension__                               \
514
(*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I);       \
515
     if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec))                          \
516
       rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__,       \
517
                                  __FUNCTION__);                        \
518
     &_rtvec->elem[_i]; }))
519
 
520
#define XWINT(RTX, N) __extension__                                     \
521
(*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
522
     const enum rtx_code _code = GET_CODE (_rtx);                       \
523
     if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                 \
524
       rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
525
                                __FUNCTION__);                          \
526
     if (GET_RTX_FORMAT(_code)[_n] != 'w')                              \
527
       rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__,       \
528
                               __FUNCTION__);                           \
529
     &_rtx->u.hwint[_n]; }))
530
 
531
#define XCWINT(RTX, N, C) __extension__                                 \
532
(*({ __typeof (RTX) const _rtx = (RTX);                                 \
533
     if (GET_CODE (_rtx) != (C))                                        \
534
       rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__,           \
535
                               __FUNCTION__);                           \
536
     &_rtx->u.hwint[N]; }))
537
 
538
#define XCMWINT(RTX, N, C, M) __extension__                             \
539
(*({ __typeof (RTX) const _rtx = (RTX);                                 \
540
     if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M))              \
541
       rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__,     \
542
                                   __LINE__, __FUNCTION__);             \
543
     &_rtx->u.hwint[N]; }))
544
 
545
#define XCNMPRV(RTX, C, M) __extension__                                \
546
({ __typeof (RTX) const _rtx = (RTX);                                   \
547
   if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M))                \
548
     rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__,        \
549
                                 __LINE__, __FUNCTION__);               \
550
   &_rtx->u.rv; })
551
 
552
#define XCNMPFV(RTX, C, M) __extension__                                \
553
({ __typeof (RTX) const _rtx = (RTX);                                   \
554
   if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M))                \
555
     rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__,        \
556
                                 __LINE__, __FUNCTION__);               \
557
   &_rtx->u.fv; })
558
 
559
#define BLOCK_SYMBOL_CHECK(RTX) __extension__                           \
560
({ __typeof (RTX) const _symbol = (RTX);                                \
561
   const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
562
   if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0)                        \
563
     rtl_check_failed_block_symbol (__FILE__, __LINE__,                 \
564
                                    __FUNCTION__);                      \
565
   &_symbol->u.block_sym; })
566
 
567
extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
568
                                     const char *)
569
    ATTRIBUTE_NORETURN;
570
extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
571
                                    const char *)
572
    ATTRIBUTE_NORETURN;
573
extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
574
                                    int, const char *)
575
    ATTRIBUTE_NORETURN;
576
extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
577
                                    int, const char *)
578
    ATTRIBUTE_NORETURN;
579
extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
580
                                    const char *, int, const char *)
581
    ATTRIBUTE_NORETURN;
582
extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
583
                                        bool, const char *, int, const char *)
584
    ATTRIBUTE_NORETURN;
585
extern void rtl_check_failed_block_symbol (const char *, int, const char *)
586
    ATTRIBUTE_NORETURN;
587
extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
588
                                       const char *)
589
    ATTRIBUTE_NORETURN;
590
 
591
#else   /* not ENABLE_RTL_CHECKING */
592
 
593
#define RTL_CHECK1(RTX, N, C1)      ((RTX)->u.fld[N])
594
#define RTL_CHECK2(RTX, N, C1, C2)  ((RTX)->u.fld[N])
595
#define RTL_CHECKC1(RTX, N, C)      ((RTX)->u.fld[N])
596
#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
597
#define RTVEC_ELT(RTVEC, I)         ((RTVEC)->elem[I])
598
#define XWINT(RTX, N)               ((RTX)->u.hwint[N])
599
#define XCWINT(RTX, N, C)           ((RTX)->u.hwint[N])
600
#define XCMWINT(RTX, N, C, M)       ((RTX)->u.hwint[N])
601
#define XCNMWINT(RTX, N, C, M)      ((RTX)->u.hwint[N])
602
#define XCNMPRV(RTX, C, M)          (&(RTX)->u.rv)
603
#define XCNMPFV(RTX, C, M)          (&(RTX)->u.fv)
604
#define BLOCK_SYMBOL_CHECK(RTX)     (&(RTX)->u.block_sym)
605
 
606
#endif
607
 
608
/* General accessor macros for accessing the flags of an rtx.  */
609
 
610
/* Access an individual rtx flag, with no checking of any kind.  */
611
#define RTX_FLAG(RTX, FLAG)     ((RTX)->FLAG)
612
 
613
#if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
614
#define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__                    \
615
({ __typeof (RTX) const _rtx = (RTX);                                   \
616
   if (GET_CODE(_rtx) != C1)                                            \
617
     rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
618
                             __FUNCTION__);                             \
619
   _rtx; })
620
 
621
#define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__                \
622
({ __typeof (RTX) const _rtx = (RTX);                                   \
623
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2)                    \
624
     rtl_check_failed_flag  (NAME,_rtx, __FILE__, __LINE__,             \
625
                              __FUNCTION__);                            \
626
   _rtx; })
627
 
628
#define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__            \
629
({ __typeof (RTX) const _rtx = (RTX);                                   \
630
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
631
       && GET_CODE(_rtx) != C3)                                         \
632
     rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
633
                             __FUNCTION__);                             \
634
   _rtx; })
635
 
636
#define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__        \
637
({ __typeof (RTX) const _rtx = (RTX);                                   \
638
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
639
       && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4)                 \
640
     rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
641
                              __FUNCTION__);                            \
642
   _rtx; })
643
 
644
#define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__    \
645
({ __typeof (RTX) const _rtx = (RTX);                                   \
646
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
647
       && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
648
       && GET_CODE(_rtx) != C5)                                         \
649
     rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
650
                             __FUNCTION__);                             \
651
   _rtx; })
652
 
653
#define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6)              \
654
  __extension__                                                         \
655
({ __typeof (RTX) const _rtx = (RTX);                                   \
656
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
657
       && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
658
       && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6)                 \
659
     rtl_check_failed_flag  (NAME,_rtx, __FILE__, __LINE__,             \
660
                             __FUNCTION__);                             \
661
   _rtx; })
662
 
663
#define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7)          \
664
  __extension__                                                         \
665
({ __typeof (RTX) const _rtx = (RTX);                                   \
666
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
667
       && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
668
       && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6                  \
669
       && GET_CODE(_rtx) != C7)                                         \
670
     rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
671
                             __FUNCTION__);                             \
672
   _rtx; })
673
 
674
#define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8)      \
675
  __extension__                                                         \
676
({ __typeof (RTX) const _rtx = (RTX);                                   \
677
   if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
678
       && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
679
       && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6                  \
680
       && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8)                 \
681
     rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
682
                             __FUNCTION__);                             \
683
   _rtx; })
684
 
685
extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
686
                                   int, const char *)
687
    ATTRIBUTE_NORETURN
688
    ;
689
 
690
#else   /* not ENABLE_RTL_FLAG_CHECKING */
691
 
692
#define RTL_FLAG_CHECK1(NAME, RTX, C1)                                  (RTX)
693
#define RTL_FLAG_CHECK2(NAME, RTX, C1, C2)                              (RTX)
694
#define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3)                          (RTX)
695
#define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4)                      (RTX)
696
#define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5)          (RTX)
697
#define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6)              (RTX)
698
#define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7)          (RTX)
699
#define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8)      (RTX)
700
#endif
701
 
702
#define XINT(RTX, N)    (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
703
#define XSTR(RTX, N)    (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
704
#define XEXP(RTX, N)    (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
705
#define XVEC(RTX, N)    (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
706
#define XMODE(RTX, N)   (RTL_CHECK1 (RTX, N, 'M').rt_type)
707
#define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
708
#define XTREE(RTX, N)   (RTL_CHECK1 (RTX, N, 't').rt_tree)
709
#define XBBDEF(RTX, N)  (RTL_CHECK1 (RTX, N, 'B').rt_bb)
710
#define XTMPL(RTX, N)   (RTL_CHECK1 (RTX, N, 'T').rt_str)
711
 
712
#define XVECEXP(RTX, N, M)      RTVEC_ELT (XVEC (RTX, N), M)
713
#define XVECLEN(RTX, N)         GET_NUM_ELEM (XVEC (RTX, N))
714
 
715
/* These are like XINT, etc. except that they expect a '0' field instead
716
   of the normal type code.  */
717
 
718
#define X0INT(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_int)
719
#define X0UINT(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_uint)
720
#define X0STR(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_str)
721
#define X0EXP(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_rtx)
722
#define X0VEC(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
723
#define X0MODE(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_type)
724
#define X0BITMAP(RTX, N)   (RTL_CHECK1 (RTX, N, '0').rt_bit)
725
#define X0TREE(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_tree)
726
#define X0BBDEF(RTX, N)    (RTL_CHECK1 (RTX, N, '0').rt_bb)
727
#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
728
#define X0CSELIB(RTX, N)   (RTL_CHECK1 (RTX, N, '0').rt_cselib)
729
#define X0MEMATTR(RTX, N)  (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
730
#define X0REGATTR(RTX, N)  (RTL_CHECKC1 (RTX, N, REG).rt_reg)
731
#define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
732
 
733
/* Access a '0' field with any type.  */
734
#define X0ANY(RTX, N)      RTL_CHECK1 (RTX, N, '0')
735
 
736
#define XCINT(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_int)
737
#define XCUINT(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_uint)
738
#define XCSTR(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_str)
739
#define XCEXP(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_rtx)
740
#define XCVEC(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
741
#define XCMODE(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_type)
742
#define XCBITMAP(RTX, N, C)   (RTL_CHECKC1 (RTX, N, C).rt_bit)
743
#define XCTREE(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_tree)
744
#define XCBBDEF(RTX, N, C)    (RTL_CHECKC1 (RTX, N, C).rt_bb)
745
#define XCCSELIB(RTX, N, C)   (RTL_CHECKC1 (RTX, N, C).rt_cselib)
746
 
747
#define XCVECEXP(RTX, N, M, C)  RTVEC_ELT (XCVEC (RTX, N, C), M)
748
#define XCVECLEN(RTX, N, C)     GET_NUM_ELEM (XCVEC (RTX, N, C))
749
 
750
#define XC2EXP(RTX, N, C1, C2)      (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
751
 
752
/* ACCESS MACROS for particular fields of insns.  */
753
 
754
/* Holds a unique number for each insn.
755
   These are not necessarily sequentially increasing.  */
756
#define INSN_UID(INSN)  XINT (INSN, 0)
757
 
758
/* Chain insns together in sequence.  */
759
#define PREV_INSN(INSN) XEXP (INSN, 1)
760
#define NEXT_INSN(INSN) XEXP (INSN, 2)
761
 
762
#define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
763
#define INSN_LOCATOR(INSN) XINT (INSN, 4)
764
/* LOCATION of an RTX if relevant.  */
765
#define RTL_LOCATION(X) (INSN_P (X) ? \
766
                         locator_location (INSN_LOCATOR (X)) \
767
                         : UNKNOWN_LOCATION)
768
/* LOCATION of current INSN.  */
769
#define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
770
/* The body of an insn.  */
771
#define PATTERN(INSN)   XEXP (INSN, 5)
772
 
773
/* Code number of instruction, from when it was recognized.
774
   -1 means this instruction has not been recognized yet.  */
775
#define INSN_CODE(INSN) XINT (INSN, 6)
776
 
777
#define RTX_FRAME_RELATED_P(RTX)                                        \
778
  (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN,      \
779
                   CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
780
 
781
/* 1 if RTX is an insn that has been deleted.  */
782
#define INSN_DELETED_P(RTX)                                             \
783
  (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN,           \
784
                   CALL_INSN, JUMP_INSN,                                \
785
                   CODE_LABEL, BARRIER, NOTE)->volatil)
786
 
787
/* 1 if RTX is a call to a const function.  Built from ECF_CONST and
788
   TREE_READONLY.  */
789
#define RTL_CONST_CALL_P(RTX)                                   \
790
  (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
791
 
792
/* 1 if RTX is a call to a pure function.  Built from ECF_PURE and
793
   DECL_PURE_P.  */
794
#define RTL_PURE_CALL_P(RTX)                                    \
795
  (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
796
 
797
/* 1 if RTX is a call to a const or pure function.  */
798
#define RTL_CONST_OR_PURE_CALL_P(RTX) \
799
  (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
800
 
801
/* 1 if RTX is a call to a looping const or pure function.  Built from
802
   ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P.  */
803
#define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX)                                   \
804
  (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
805
 
806
/* 1 if RTX is a call_insn for a sibling call.  */
807
#define SIBLING_CALL_P(RTX)                                             \
808
  (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
809
 
810
/* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch.  */
811
#define INSN_ANNULLED_BRANCH_P(RTX)                                     \
812
  (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
813
 
814
/* 1 if RTX is an insn in a delay slot and is from the target of the branch.
815
   If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
816
   executed if the branch is taken.  For annulled branches with this bit
817
   clear, the insn should be executed only if the branch is not taken.  */
818
#define INSN_FROM_TARGET_P(RTX)                                         \
819
  (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
820
 
821
/* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
822
   See the comments for ADDR_DIFF_VEC in rtl.def.  */
823
#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
824
 
825
/* In a VALUE, the value cselib has assigned to RTX.
826
   This is a "struct cselib_val_struct", see cselib.h.  */
827
#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
828
 
829
/* Holds a list of notes on what this insn does to various REGs.
830
   It is a chain of EXPR_LIST rtx's, where the second operand is the
831
   chain pointer and the first operand is the REG being described.
832
   The mode field of the EXPR_LIST contains not a real machine mode
833
   but a value from enum reg_note.  */
834
#define REG_NOTES(INSN) XEXP(INSN, 7)
835
 
836
enum reg_note
837
{
838
#define DEF_REG_NOTE(NAME) NAME,
839
#include "reg-notes.def"
840
#undef DEF_REG_NOTE
841
  REG_NOTE_MAX
842
};
843
 
844
/* Define macros to extract and insert the reg-note kind in an EXPR_LIST.  */
845
#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
846
#define PUT_REG_NOTE_KIND(LINK, KIND) \
847
  PUT_MODE (LINK, (enum machine_mode) (KIND))
848
 
849
/* Names for REG_NOTE's in EXPR_LIST insn's.  */
850
 
851
extern const char * const reg_note_name[];
852
#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
853
 
854
/* This field is only present on CALL_INSNs.  It holds a chain of EXPR_LIST of
855
   USE and CLOBBER expressions.
856
     USE expressions list the registers filled with arguments that
857
   are passed to the function.
858
     CLOBBER expressions document the registers explicitly clobbered
859
   by this CALL_INSN.
860
     Pseudo registers can not be mentioned in this list.  */
861
#define CALL_INSN_FUNCTION_USAGE(INSN)  XEXP(INSN, 8)
862
 
863
/* The label-number of a code-label.  The assembler label
864
   is made from `L' and the label-number printed in decimal.
865
   Label numbers are unique in a compilation.  */
866
#define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
867
 
868
/* In a NOTE that is a line number, this is a string for the file name that the
869
   line is in.  We use the same field to record block numbers temporarily in
870
   NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes.  (We avoid lots of casts
871
   between ints and pointers if we use a different macro for the block number.)
872
   */
873
 
874
/* Opaque data.  */
875
#define NOTE_DATA(INSN)         RTL_CHECKC1 (INSN, 4, NOTE)
876
#define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
877
#define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
878
#define NOTE_BLOCK(INSN)        XCTREE (INSN, 4, NOTE)
879
#define NOTE_EH_HANDLER(INSN)   XCINT (INSN, 4, NOTE)
880
#define NOTE_BASIC_BLOCK(INSN)  XCBBDEF (INSN, 4, NOTE)
881
#define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
882
 
883
/* In a NOTE that is a line number, this is the line number.
884
   Other kinds of NOTEs are identified by negative numbers here.  */
885
#define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
886
 
887
/* Nonzero if INSN is a note marking the beginning of a basic block.  */
888
#define NOTE_INSN_BASIC_BLOCK_P(INSN)                   \
889
  (GET_CODE (INSN) == NOTE                              \
890
   && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
891
 
892
/* Variable declaration and the location of a variable.  */
893
#define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
894
#define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
895
 
896
/* Initialization status of the variable in the location.  Status
897
   can be unknown, uninitialized or initialized.  See enumeration
898
   type below.  */
899
#define PAT_VAR_LOCATION_STATUS(PAT) \
900
  ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
901
 
902
/* Accessors for a NOTE_INSN_VAR_LOCATION.  */
903
#define NOTE_VAR_LOCATION_DECL(NOTE) \
904
  PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
905
#define NOTE_VAR_LOCATION_LOC(NOTE) \
906
  PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
907
#define NOTE_VAR_LOCATION_STATUS(NOTE) \
908
  PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
909
 
910
/* The VAR_LOCATION rtx in a DEBUG_INSN.  */
911
#define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
912
 
913
/* Accessors for a tree-expanded var location debug insn.  */
914
#define INSN_VAR_LOCATION_DECL(INSN) \
915
  PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
916
#define INSN_VAR_LOCATION_LOC(INSN) \
917
  PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
918
#define INSN_VAR_LOCATION_STATUS(INSN) \
919
  PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
920
 
921
/* Expand to the RTL that denotes an unknown variable location in a
922
   DEBUG_INSN.  */
923
#define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
924
 
925
/* Determine whether X is such an unknown location.  */
926
#define VAR_LOC_UNKNOWN_P(X) \
927
  (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
928
 
929
/* 1 if RTX is emitted after a call, but it should take effect before
930
   the call returns.  */
931
#define NOTE_DURING_CALL_P(RTX)                         \
932
  (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
933
 
934
/* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX.  */
935
#define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
936
 
937
/* Possible initialization status of a variable.   When requested
938
   by the user, this information is tracked and recorded in the DWARF
939
   debug information, along with the variable's location.  */
940
enum var_init_status
941
{
942
  VAR_INIT_STATUS_UNKNOWN,
943
  VAR_INIT_STATUS_UNINITIALIZED,
944
  VAR_INIT_STATUS_INITIALIZED
945
};
946
 
947
/* Codes that appear in the NOTE_KIND field for kinds of notes
948
   that are not line numbers.  These codes are all negative.
949
 
950
   Notice that we do not try to use zero here for any of
951
   the special note codes because sometimes the source line
952
   actually can be zero!  This happens (for example) when we
953
   are generating code for the per-translation-unit constructor
954
   and destructor routines for some C++ translation unit.  */
955
 
956
enum insn_note
957
{
958
#define DEF_INSN_NOTE(NAME) NAME,
959
#include "insn-notes.def"
960
#undef DEF_INSN_NOTE
961
 
962
  NOTE_INSN_MAX
963
};
964
 
965
/* Names for NOTE insn's other than line numbers.  */
966
 
967
extern const char * const note_insn_name[NOTE_INSN_MAX];
968
#define GET_NOTE_INSN_NAME(NOTE_CODE) \
969
  (note_insn_name[(NOTE_CODE)])
970
 
971
/* The name of a label, in case it corresponds to an explicit label
972
   in the input source code.  */
973
#define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
974
 
975
/* In jump.c, each label contains a count of the number
976
   of LABEL_REFs that point at it, so unused labels can be deleted.  */
977
#define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
978
 
979
/* Labels carry a two-bit field composed of the ->jump and ->call
980
   bits.  This field indicates whether the label is an alternate
981
   entry point, and if so, what kind.  */
982
enum label_kind
983
{
984
  LABEL_NORMAL = 0,      /* ordinary label */
985
  LABEL_STATIC_ENTRY,   /* alternate entry point, not exported */
986
  LABEL_GLOBAL_ENTRY,   /* alternate entry point, exported */
987
  LABEL_WEAK_ENTRY      /* alternate entry point, exported as weak symbol */
988
};
989
 
990
#if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
991
 
992
/* Retrieve the kind of LABEL.  */
993
#define LABEL_KIND(LABEL) __extension__                                 \
994
({ __typeof (LABEL) const _label = (LABEL);                             \
995
   if (GET_CODE (_label) != CODE_LABEL)                                 \
996
     rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__,   \
997
                            __FUNCTION__);                              \
998
   (enum label_kind) ((_label->jump << 1) | _label->call); })
999
 
1000
/* Set the kind of LABEL.  */
1001
#define SET_LABEL_KIND(LABEL, KIND) do {                                \
1002
   __typeof (LABEL) const _label = (LABEL);                             \
1003
   const unsigned int _kind = (KIND);                                   \
1004
   if (GET_CODE (_label) != CODE_LABEL)                                 \
1005
     rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1006
                            __FUNCTION__);                              \
1007
   _label->jump = ((_kind >> 1) & 1);                                   \
1008
   _label->call = (_kind & 1);                                          \
1009
} while (0)
1010
 
1011
#else
1012
 
1013
/* Retrieve the kind of LABEL.  */
1014
#define LABEL_KIND(LABEL) \
1015
   ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1016
 
1017
/* Set the kind of LABEL.  */
1018
#define SET_LABEL_KIND(LABEL, KIND) do {                                \
1019
   rtx const _label = (LABEL);                                          \
1020
   const unsigned int _kind = (KIND);                                   \
1021
   _label->jump = ((_kind >> 1) & 1);                                   \
1022
   _label->call = (_kind & 1);                                          \
1023
} while (0)
1024
 
1025
#endif /* rtl flag checking */
1026
 
1027
#define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1028
 
1029
/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1030
   so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1031
   be decremented and possibly the label can be deleted.  */
1032
#define JUMP_LABEL(INSN)   XCEXP (INSN, 8, JUMP_INSN)
1033
 
1034
/* Once basic blocks are found, each CODE_LABEL starts a chain that
1035
   goes through all the LABEL_REFs that jump to that label.  The chain
1036
   eventually winds up at the CODE_LABEL: it is circular.  */
1037
#define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1038
 
1039
/* For a REG rtx, REGNO extracts the register number.  REGNO can only
1040
   be used on RHS.  Use SET_REGNO to change the value.  */
1041
#define REGNO(RTX) (rhs_regno(RTX))
1042
#define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1043
 
1044
/* ORIGINAL_REGNO holds the number the register originally had; for a
1045
   pseudo register turned into a hard reg this will hold the old pseudo
1046
   register number.  */
1047
#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1048
 
1049
/* Force the REGNO macro to only be used on the lhs.  */
1050
static inline unsigned int
1051
rhs_regno (const_rtx x)
1052
{
1053
  return XCUINT (x, 0, REG);
1054
}
1055
 
1056
 
1057
 
1058
/* 1 if RTX is a reg or parallel that is the current function's return
1059
   value.  */
1060
#define REG_FUNCTION_VALUE_P(RTX)                                       \
1061
  (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1062
 
1063
/* 1 if RTX is a reg that corresponds to a variable declared by the user.  */
1064
#define REG_USERVAR_P(RTX)                                              \
1065
  (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1066
 
1067
/* 1 if RTX is a reg that holds a pointer value.  */
1068
#define REG_POINTER(RTX)                                                \
1069
  (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1070
 
1071
/* 1 if RTX is a mem that holds a pointer value.  */
1072
#define MEM_POINTER(RTX)                                                \
1073
  (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1074
 
1075
/* 1 if the given register REG corresponds to a hard register.  */
1076
#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1077
 
1078
/* 1 if the given register number REG_NO corresponds to a hard register.  */
1079
#define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1080
 
1081
/* For a CONST_INT rtx, INTVAL extracts the integer.  */
1082
#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1083
#define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1084
 
1085
/* For a CONST_DOUBLE:
1086
   For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1087
     low-order word and ..._HIGH the high-order.
1088
   For a float, there is a REAL_VALUE_TYPE structure, and
1089
     CONST_DOUBLE_REAL_VALUE(r) is a pointer to it.  */
1090
#define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1091
#define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1092
#define CONST_DOUBLE_REAL_VALUE(r) \
1093
  ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1094
 
1095
#define CONST_FIXED_VALUE(r) \
1096
  ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1097
#define CONST_FIXED_VALUE_HIGH(r) \
1098
  ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1099
#define CONST_FIXED_VALUE_LOW(r) \
1100
  ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1101
 
1102
/* For a CONST_VECTOR, return element #n.  */
1103
#define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1104
 
1105
/* For a CONST_VECTOR, return the number of elements in a vector.  */
1106
#define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1107
 
1108
/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1109
   SUBREG_BYTE extracts the byte-number.  */
1110
 
1111
#define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1112
#define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1113
 
1114
/* in rtlanal.c */
1115
/* Return the right cost to give to an operation
1116
   to make the cost of the corresponding register-to-register instruction
1117
   N times that of a fast register-to-register instruction.  */
1118
#define COSTS_N_INSNS(N) ((N) * 4)
1119
 
1120
/* Maximum cost of an rtl expression.  This value has the special meaning
1121
   not to use an rtx with this cost under any circumstances.  */
1122
#define MAX_COST INT_MAX
1123
 
1124
extern void init_rtlanal (void);
1125
extern int rtx_cost (rtx, enum rtx_code, bool);
1126
extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1127
extern unsigned int subreg_lsb (const_rtx);
1128
extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1129
                                  unsigned int);
1130
extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1131
                                         unsigned int, enum machine_mode);
1132
extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1133
                                           unsigned int, enum machine_mode);
1134
extern unsigned int subreg_regno (const_rtx);
1135
extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1136
                                  unsigned int, enum machine_mode);
1137
extern unsigned int subreg_nregs (const_rtx);
1138
extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1139
extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1140
extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1141
extern bool constant_pool_constant_p (rtx);
1142
extern bool truncated_to_mode (enum machine_mode, const_rtx);
1143
extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1144
 
1145
 
1146
/* 1 if RTX is a subreg containing a reg that is already known to be
1147
   sign- or zero-extended from the mode of the subreg to the mode of
1148
   the reg.  SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1149
   extension.
1150
 
1151
   When used as a LHS, is means that this extension must be done
1152
   when assigning to SUBREG_REG.  */
1153
 
1154
#define SUBREG_PROMOTED_VAR_P(RTX)                                      \
1155
  (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1156
 
1157
#define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL)                          \
1158
do {                                                                    \
1159
  rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1160
  if ((VAL) < 0)                                                 \
1161
    _rtx->volatil = 1;                                                  \
1162
  else {                                                                \
1163
    _rtx->volatil = 0;                                                   \
1164
    _rtx->unchanging = (VAL);                                           \
1165
  }                                                                     \
1166
} while (0)
1167
 
1168
/* Valid for subregs which are SUBREG_PROMOTED_VAR_P().  In that case
1169
   this gives the necessary extensions:
1170
 
1171
   1  - normal unsigned
1172
   -1 - pointer unsigned, which most often can be handled like unsigned
1173
        extension, except for generating instructions where we need to
1174
        emit special code (ptr_extend insns) on some architectures.  */
1175
 
1176
#define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1177
  ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1178
   ? -1 : (int) (RTX)->unchanging)
1179
 
1180
/* Access various components of an ASM_OPERANDS rtx.  */
1181
 
1182
#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1183
#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1184
#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1185
#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1186
#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1187
#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1188
#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1189
#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1190
  XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1191
#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1192
  XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1193
#define ASM_OPERANDS_INPUT_MODE(RTX, N)  \
1194
  GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1195
#define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1196
#define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1197
#define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1198
#define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1199
#define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1200
 
1201
/* 1 if RTX is a mem that is statically allocated in read-only memory.  */
1202
#define MEM_READONLY_P(RTX) \
1203
  (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1204
 
1205
/* 1 if RTX is a mem and we should keep the alias set for this mem
1206
   unchanged when we access a component.  Set to 1, or example, when we
1207
   are already in a non-addressable component of an aggregate.  */
1208
#define MEM_KEEP_ALIAS_SET_P(RTX)                                       \
1209
  (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1210
 
1211
/* 1 if RTX is a mem or asm_operand for a volatile reference.  */
1212
#define MEM_VOLATILE_P(RTX)                                             \
1213
  (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS,          \
1214
                   ASM_INPUT)->volatil)
1215
 
1216
/* 1 if RTX is a mem that refers to an aggregate, either to the
1217
   aggregate itself or to a field of the aggregate.  If zero, RTX may
1218
   or may not be such a reference.  */
1219
#define MEM_IN_STRUCT_P(RTX)                                            \
1220
  (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1221
 
1222
/* 1 if RTX is a MEM that refers to a scalar.  If zero, RTX may or may
1223
   not refer to a scalar.  */
1224
#define MEM_SCALAR_P(RTX)                                               \
1225
  (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1226
 
1227
/* 1 if RTX is a mem that cannot trap.  */
1228
#define MEM_NOTRAP_P(RTX) \
1229
  (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1230
 
1231
/* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1232
   RTX.  Otherwise, vice versa.  Use this macro only when you are
1233
   *sure* that you know that the MEM is in a structure, or is a
1234
   scalar.  VAL is evaluated only once.  */
1235
#define MEM_SET_IN_STRUCT_P(RTX, VAL)           \
1236
do {                                            \
1237
  if (VAL)                                      \
1238
    {                                           \
1239
      MEM_IN_STRUCT_P (RTX) = 1;                \
1240
      MEM_SCALAR_P (RTX) = 0;                    \
1241
    }                                           \
1242
  else                                          \
1243
    {                                           \
1244
      MEM_IN_STRUCT_P (RTX) = 0;         \
1245
      MEM_SCALAR_P (RTX) = 1;                   \
1246
    }                                           \
1247
} while (0)
1248
 
1249
/* The memory attribute block.  We provide access macros for each value
1250
   in the block and provide defaults if none specified.  */
1251
#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1252
 
1253
/* The register attribute block.  We provide access macros for each value
1254
   in the block and provide defaults if none specified.  */
1255
#define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1256
 
1257
/* For a MEM rtx, the alias set.  If 0, this MEM is not in any alias
1258
   set, and may alias anything.  Otherwise, the MEM can only alias
1259
   MEMs in a conflicting alias set.  This value is set in a
1260
   language-dependent manner in the front-end, and should not be
1261
   altered in the back-end.  These set numbers are tested with
1262
   alias_sets_conflict_p.  */
1263
#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1264
 
1265
/* For a MEM rtx, the decl it is known to refer to, if it is known to
1266
   refer to part of a DECL.  It may also be a COMPONENT_REF.  */
1267
#define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1268
 
1269
/* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1270
   RTX that is always a CONST_INT.  */
1271
#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1272
 
1273
/* For a MEM rtx, the address space.  */
1274
#define MEM_ADDR_SPACE(RTX) (MEM_ATTRS (RTX) == 0 ? ADDR_SPACE_GENERIC \
1275
                                                  : MEM_ATTRS (RTX)->addrspace)
1276
 
1277
/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1278
   is always a CONST_INT.  */
1279
#define MEM_SIZE(RTX)                                                   \
1280
(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size                            \
1281
 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1282
 : 0)
1283
 
1284
/* For a MEM rtx, the alignment in bits.  We can use the alignment of the
1285
   mode as a default when STRICT_ALIGNMENT, but not if not.  */
1286
#define MEM_ALIGN(RTX)                                                  \
1287
(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align                           \
1288
 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode                       \
1289
    ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1290
 
1291
/* For a REG rtx, the decl it is known to refer to, if it is known to
1292
   refer to part of a DECL.  */
1293
#define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1294
 
1295
/* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1296
   HOST_WIDE_INT.  */
1297
#define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1298
 
1299
/* Copy the attributes that apply to memory locations from RHS to LHS.  */
1300
#define MEM_COPY_ATTRIBUTES(LHS, RHS)                           \
1301
  (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS),                 \
1302
   MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS),               \
1303
   MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS),                     \
1304
   MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS),                     \
1305
   MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS),                 \
1306
   MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS),     \
1307
   MEM_POINTER (LHS) = MEM_POINTER (RHS),                       \
1308
   MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1309
 
1310
/* 1 if RTX is a label_ref for a nonlocal label.  */
1311
/* Likewise in an expr_list for a REG_LABEL_OPERAND or
1312
   REG_LABEL_TARGET note.  */
1313
#define LABEL_REF_NONLOCAL_P(RTX)                                       \
1314
  (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1315
 
1316
/* 1 if RTX is a code_label that should always be considered to be needed.  */
1317
#define LABEL_PRESERVE_P(RTX)                                           \
1318
  (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1319
 
1320
/* During sched, 1 if RTX is an insn that must be scheduled together
1321
   with the preceding insn.  */
1322
#define SCHED_GROUP_P(RTX)                                              \
1323
  (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN,            \
1324
                   JUMP_INSN, CALL_INSN                                 \
1325
                   )->in_struct)
1326
 
1327
/* For a SET rtx, SET_DEST is the place that is set
1328
   and SET_SRC is the value it is set to.  */
1329
#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1330
#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1331
#define SET_IS_RETURN_P(RTX)                                            \
1332
  (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1333
 
1334
/* For a TRAP_IF rtx, TRAP_CONDITION is an expression.  */
1335
#define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1336
#define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1337
 
1338
/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1339
   conditionally executing the code on, COND_EXEC_CODE is the code
1340
   to execute if the condition is true.  */
1341
#define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1342
#define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1343
 
1344
/* 1 if RTX is a symbol_ref that addresses this function's rtl
1345
   constants pool.  */
1346
#define CONSTANT_POOL_ADDRESS_P(RTX)                                    \
1347
  (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1348
 
1349
/* 1 if RTX is a symbol_ref that addresses a value in the file's
1350
   tree constant pool.  This information is private to varasm.c.  */
1351
#define TREE_CONSTANT_POOL_ADDRESS_P(RTX)                               \
1352
  (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P",                      \
1353
                   (RTX), SYMBOL_REF)->frame_related)
1354
 
1355
/* Used if RTX is a symbol_ref, for machine-specific purposes.  */
1356
#define SYMBOL_REF_FLAG(RTX)                                            \
1357
  (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1358
 
1359
/* 1 if RTX is a symbol_ref that has been the library function in
1360
   emit_library_call.  */
1361
#define SYMBOL_REF_USED(RTX)                                            \
1362
  (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1363
 
1364
/* 1 if RTX is a symbol_ref for a weak symbol.  */
1365
#define SYMBOL_REF_WEAK(RTX)                                            \
1366
  (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1367
 
1368
/* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1369
   SYMBOL_REF_CONSTANT.  */
1370
#define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1371
 
1372
/* Set RTX's SYMBOL_REF_DECL to DECL.  RTX must not be a constant
1373
   pool symbol.  */
1374
#define SET_SYMBOL_REF_DECL(RTX, DECL) \
1375
  (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1376
 
1377
/* The tree (decl or constant) associated with the symbol, or null.  */
1378
#define SYMBOL_REF_DECL(RTX) \
1379
  (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1380
 
1381
/* Set RTX's SYMBOL_REF_CONSTANT to C.  RTX must be a constant pool symbol.  */
1382
#define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1383
  (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1384
 
1385
/* The rtx constant pool entry for a symbol, or null.  */
1386
#define SYMBOL_REF_CONSTANT(RTX) \
1387
  (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1388
 
1389
/* A set of flags on a symbol_ref that are, in some respects, redundant with
1390
   information derivable from the tree decl associated with this symbol.
1391
   Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1392
   decl.  In some cases this is a bug.  But beyond that, it's nice to cache
1393
   this information to avoid recomputing it.  Finally, this allows space for
1394
   the target to store more than one bit of information, as with
1395
   SYMBOL_REF_FLAG.  */
1396
#define SYMBOL_REF_FLAGS(RTX)   X0INT ((RTX), 1)
1397
 
1398
/* These flags are common enough to be defined for all targets.  They
1399
   are computed by the default version of targetm.encode_section_info.  */
1400
 
1401
/* Set if this symbol is a function.  */
1402
#define SYMBOL_FLAG_FUNCTION    (1 << 0)
1403
#define SYMBOL_REF_FUNCTION_P(RTX) \
1404
  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1405
/* Set if targetm.binds_local_p is true.  */
1406
#define SYMBOL_FLAG_LOCAL       (1 << 1)
1407
#define SYMBOL_REF_LOCAL_P(RTX) \
1408
  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1409
/* Set if targetm.in_small_data_p is true.  */
1410
#define SYMBOL_FLAG_SMALL       (1 << 2)
1411
#define SYMBOL_REF_SMALL_P(RTX) \
1412
  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1413
/* The three-bit field at [5:3] is true for TLS variables; use
1414
   SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model.  */
1415
#define SYMBOL_FLAG_TLS_SHIFT   3
1416
#define SYMBOL_REF_TLS_MODEL(RTX) \
1417
  ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1418
/* Set if this symbol is not defined in this translation unit.  */
1419
#define SYMBOL_FLAG_EXTERNAL    (1 << 6)
1420
#define SYMBOL_REF_EXTERNAL_P(RTX) \
1421
  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1422
/* Set if this symbol has a block_symbol structure associated with it.  */
1423
#define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1424
#define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1425
  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1426
/* Set if this symbol is a section anchor.  SYMBOL_REF_ANCHOR_P implies
1427
   SYMBOL_REF_HAS_BLOCK_INFO_P.  */
1428
#define SYMBOL_FLAG_ANCHOR      (1 << 8)
1429
#define SYMBOL_REF_ANCHOR_P(RTX) \
1430
  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1431
 
1432
/* Subsequent bits are available for the target to use.  */
1433
#define SYMBOL_FLAG_MACH_DEP_SHIFT      9
1434
#define SYMBOL_FLAG_MACH_DEP            (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1435
 
1436
/* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1437
   structure to which the symbol belongs, or NULL if it has not been
1438
   assigned a block.  */
1439
#define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1440
 
1441
/* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1442
   the first object in SYMBOL_REF_BLOCK (RTX).  The value is negative if
1443
   RTX has not yet been assigned to a block, or it has not been given an
1444
   offset within that block.  */
1445
#define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1446
 
1447
/* True if RTX is flagged to be a scheduling barrier.  */
1448
#define PREFETCH_SCHEDULE_BARRIER_P(RTX)                                        \
1449
  (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1450
 
1451
/* Indicate whether the machine has any sort of auto increment addressing.
1452
   If not, we can avoid checking for REG_INC notes.  */
1453
 
1454
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1455
     || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1456
     || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1457
     || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1458
#define AUTO_INC_DEC
1459
#endif
1460
 
1461
/* Define a macro to look for REG_INC notes,
1462
   but save time on machines where they never exist.  */
1463
 
1464
#ifdef AUTO_INC_DEC
1465
#define FIND_REG_INC_NOTE(INSN, REG)                    \
1466
  ((REG) != NULL_RTX && REG_P ((REG))                   \
1467
   ? find_regno_note ((INSN), REG_INC, REGNO (REG))     \
1468
   : find_reg_note ((INSN), REG_INC, (REG)))
1469
#else
1470
#define FIND_REG_INC_NOTE(INSN, REG) 0
1471
#endif
1472
 
1473
#ifndef HAVE_PRE_INCREMENT
1474
#define HAVE_PRE_INCREMENT 0
1475
#endif
1476
 
1477
#ifndef HAVE_PRE_DECREMENT
1478
#define HAVE_PRE_DECREMENT 0
1479
#endif
1480
 
1481
#ifndef HAVE_POST_INCREMENT
1482
#define HAVE_POST_INCREMENT 0
1483
#endif
1484
 
1485
#ifndef HAVE_POST_DECREMENT
1486
#define HAVE_POST_DECREMENT 0
1487
#endif
1488
 
1489
#ifndef HAVE_POST_MODIFY_DISP
1490
#define HAVE_POST_MODIFY_DISP 0
1491
#endif
1492
 
1493
#ifndef HAVE_POST_MODIFY_REG
1494
#define HAVE_POST_MODIFY_REG 0
1495
#endif
1496
 
1497
#ifndef HAVE_PRE_MODIFY_DISP
1498
#define HAVE_PRE_MODIFY_DISP 0
1499
#endif
1500
 
1501
#ifndef HAVE_PRE_MODIFY_REG
1502
#define HAVE_PRE_MODIFY_REG 0
1503
#endif
1504
 
1505
 
1506
/* Some architectures do not have complete pre/post increment/decrement
1507
   instruction sets, or only move some modes efficiently.  These macros
1508
   allow us to tune autoincrement generation.  */
1509
 
1510
#ifndef USE_LOAD_POST_INCREMENT
1511
#define USE_LOAD_POST_INCREMENT(MODE)   HAVE_POST_INCREMENT
1512
#endif
1513
 
1514
#ifndef USE_LOAD_POST_DECREMENT
1515
#define USE_LOAD_POST_DECREMENT(MODE)   HAVE_POST_DECREMENT
1516
#endif
1517
 
1518
#ifndef USE_LOAD_PRE_INCREMENT
1519
#define USE_LOAD_PRE_INCREMENT(MODE)    HAVE_PRE_INCREMENT
1520
#endif
1521
 
1522
#ifndef USE_LOAD_PRE_DECREMENT
1523
#define USE_LOAD_PRE_DECREMENT(MODE)    HAVE_PRE_DECREMENT
1524
#endif
1525
 
1526
#ifndef USE_STORE_POST_INCREMENT
1527
#define USE_STORE_POST_INCREMENT(MODE)  HAVE_POST_INCREMENT
1528
#endif
1529
 
1530
#ifndef USE_STORE_POST_DECREMENT
1531
#define USE_STORE_POST_DECREMENT(MODE)  HAVE_POST_DECREMENT
1532
#endif
1533
 
1534
#ifndef USE_STORE_PRE_INCREMENT
1535
#define USE_STORE_PRE_INCREMENT(MODE)   HAVE_PRE_INCREMENT
1536
#endif
1537
 
1538
#ifndef USE_STORE_PRE_DECREMENT
1539
#define USE_STORE_PRE_DECREMENT(MODE)   HAVE_PRE_DECREMENT
1540
#endif
1541
 
1542
/* Nonzero when we are generating CONCATs.  */
1543
extern int generating_concat_p;
1544
 
1545
/* Nonzero when we are expanding trees to RTL.  */
1546
extern int currently_expanding_to_rtl;
1547
 
1548
/* Generally useful functions.  */
1549
 
1550
/* In expmed.c */
1551
extern int ceil_log2 (unsigned HOST_WIDE_INT);
1552
 
1553
/* In explow.c */
1554
extern void set_stack_check_libfunc (rtx);
1555
extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1556
extern rtx plus_constant (rtx, HOST_WIDE_INT);
1557
 
1558
/* In emit-rtl.c */
1559
extern rtx gen_blockage (void);
1560
extern rtvec gen_rtvec (int, ...);
1561
extern rtx copy_insn_1 (rtx);
1562
extern rtx copy_insn (rtx);
1563
extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1564
extern rtx emit_copy_of_insn_after (rtx, rtx);
1565
extern void set_reg_attrs_from_value (rtx, rtx);
1566
extern void set_reg_attrs_for_parm (rtx, rtx);
1567
extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1568
extern void adjust_reg_mode (rtx, enum machine_mode);
1569
extern int mem_expr_equal_p (const_tree, const_tree);
1570
 
1571
/* In rtl.c */
1572
extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1573
#define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1574
 
1575
extern rtvec rtvec_alloc (int);
1576
extern rtvec shallow_copy_rtvec (rtvec);
1577
extern bool shared_const_p (const_rtx);
1578
extern rtx copy_rtx (rtx);
1579
extern void dump_rtx_statistics (void);
1580
 
1581
/* In emit-rtl.c */
1582
extern rtx copy_rtx_if_shared (rtx);
1583
 
1584
/* In rtl.c */
1585
extern unsigned int rtx_size (const_rtx);
1586
extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1587
#define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1588
extern int rtx_equal_p (const_rtx, const_rtx);
1589
 
1590
/* In emit-rtl.c */
1591
extern rtvec gen_rtvec_v (int, rtx *);
1592
extern rtx gen_reg_rtx (enum machine_mode);
1593
extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1594
extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1595
extern rtx gen_reg_rtx_and_attrs (rtx);
1596
extern rtx gen_label_rtx (void);
1597
extern rtx gen_lowpart_common (enum machine_mode, rtx);
1598
 
1599
/* In cse.c */
1600
extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1601
 
1602
/* In emit-rtl.c */
1603
extern rtx gen_highpart (enum machine_mode, rtx);
1604
extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1605
extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1606
 
1607
/* In emit-rtl.c */
1608
extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1609
extern int subreg_lowpart_p (const_rtx);
1610
extern unsigned int subreg_lowpart_offset (enum machine_mode,
1611
                                           enum machine_mode);
1612
extern unsigned int subreg_highpart_offset (enum machine_mode,
1613
                                            enum machine_mode);
1614
extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1615
extern rtx make_safe_from (rtx, rtx);
1616
extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1617
                                              addr_space_t);
1618
#define convert_memory_address(to_mode,x) \
1619
        convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1620
extern rtx get_insns (void);
1621
extern const char *get_insn_name (int);
1622
extern rtx get_last_insn (void);
1623
extern rtx get_last_insn_anywhere (void);
1624
extern rtx get_first_nonnote_insn (void);
1625
extern rtx get_last_nonnote_insn (void);
1626
extern void start_sequence (void);
1627
extern void push_to_sequence (rtx);
1628
extern void push_to_sequence2 (rtx, rtx);
1629
extern void end_sequence (void);
1630
extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1631
                               enum machine_mode);
1632
 
1633
/* In loop-iv.c  */
1634
 
1635
extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1636
 
1637
/* In varasm.c  */
1638
extern rtx force_const_mem (enum machine_mode, rtx);
1639
 
1640
/* In varasm.c  */
1641
 
1642
struct function;
1643
extern rtx get_pool_constant (rtx);
1644
extern rtx get_pool_constant_mark (rtx, bool *);
1645
extern enum machine_mode get_pool_mode (const_rtx);
1646
extern rtx simplify_subtraction (rtx);
1647
 
1648
/* In function.c  */
1649
extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1650
extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1651
extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1652
extern rtx assign_stack_temp_for_type (enum machine_mode,
1653
                                       HOST_WIDE_INT, int, tree);
1654
extern rtx assign_temp (tree, int, int, int);
1655
 
1656
/* In emit-rtl.c */
1657
extern rtx emit_insn_before (rtx, rtx);
1658
extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1659
extern rtx emit_insn_before_setloc (rtx, rtx, int);
1660
extern rtx emit_jump_insn_before (rtx, rtx);
1661
extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1662
extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1663
extern rtx emit_call_insn_before (rtx, rtx);
1664
extern rtx emit_call_insn_before_noloc (rtx, rtx);
1665
extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1666
extern rtx emit_debug_insn_before (rtx, rtx);
1667
extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1668
extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1669
extern rtx emit_barrier_before (rtx);
1670
extern rtx emit_label_before (rtx, rtx);
1671
extern rtx emit_note_before (enum insn_note, rtx);
1672
extern rtx emit_insn_after (rtx, rtx);
1673
extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1674
extern rtx emit_insn_after_setloc (rtx, rtx, int);
1675
extern rtx emit_jump_insn_after (rtx, rtx);
1676
extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1677
extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1678
extern rtx emit_call_insn_after (rtx, rtx);
1679
extern rtx emit_call_insn_after_noloc (rtx, rtx);
1680
extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1681
extern rtx emit_debug_insn_after (rtx, rtx);
1682
extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1683
extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1684
extern rtx emit_barrier_after (rtx);
1685
extern rtx emit_label_after (rtx, rtx);
1686
extern rtx emit_note_after (enum insn_note, rtx);
1687
extern rtx emit_insn (rtx);
1688
extern rtx emit_debug_insn (rtx);
1689
extern rtx emit_jump_insn (rtx);
1690
extern rtx emit_call_insn (rtx);
1691
extern rtx emit_label (rtx);
1692
extern rtx emit_barrier (void);
1693
extern rtx emit_note (enum insn_note);
1694
extern rtx emit_note_copy (rtx);
1695
extern rtx gen_clobber (rtx);
1696
extern rtx emit_clobber (rtx);
1697
extern rtx gen_use (rtx);
1698
extern rtx emit_use (rtx);
1699
extern rtx make_insn_raw (rtx);
1700
extern rtx make_debug_insn_raw (rtx);
1701
extern rtx make_jump_insn_raw (rtx);
1702
extern void add_function_usage_to (rtx, rtx);
1703
extern rtx last_call_insn (void);
1704
extern rtx previous_insn (rtx);
1705
extern rtx next_insn (rtx);
1706
extern rtx prev_nonnote_insn (rtx);
1707
extern rtx prev_nonnote_insn_bb (rtx);
1708
extern rtx next_nonnote_insn (rtx);
1709
extern rtx next_nonnote_insn_bb (rtx);
1710
extern rtx prev_nondebug_insn (rtx);
1711
extern rtx next_nondebug_insn (rtx);
1712 378 julius
extern rtx prev_nonnote_nondebug_insn (rtx);
1713
extern rtx next_nonnote_nondebug_insn (rtx);
1714 280 jeremybenn
extern rtx prev_real_insn (rtx);
1715
extern rtx next_real_insn (rtx);
1716
extern rtx prev_active_insn (rtx);
1717
extern rtx next_active_insn (rtx);
1718
extern int active_insn_p (const_rtx);
1719
extern rtx prev_label (rtx);
1720
extern rtx next_label (rtx);
1721
extern rtx skip_consecutive_labels (rtx);
1722
extern rtx next_cc0_user (rtx);
1723
extern rtx prev_cc0_setter (rtx);
1724
 
1725
/* In cfglayout.c  */
1726
extern int insn_line (const_rtx);
1727
extern const char * insn_file (const_rtx);
1728
extern location_t locator_location (int);
1729
extern int locator_line (int);
1730
extern const char * locator_file (int);
1731
extern bool locator_eq (int, int);
1732
extern int prologue_locator, epilogue_locator;
1733
 
1734
/* In jump.c */
1735
extern enum rtx_code reverse_condition (enum rtx_code);
1736
extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1737
extern enum rtx_code swap_condition (enum rtx_code);
1738
extern enum rtx_code unsigned_condition (enum rtx_code);
1739
extern enum rtx_code signed_condition (enum rtx_code);
1740
extern void mark_jump_label (rtx, rtx, int);
1741
extern unsigned int cleanup_barriers (void);
1742
 
1743
/* In jump.c */
1744
extern rtx delete_related_insns (rtx);
1745
 
1746
/* In recog.c  */
1747
extern rtx *find_constant_term_loc (rtx *);
1748
 
1749
/* In emit-rtl.c  */
1750
extern rtx try_split (rtx, rtx, int);
1751
extern int split_branch_probability;
1752
 
1753
/* In unknown file  */
1754
extern rtx split_insns (rtx, rtx);
1755
 
1756
/* In simplify-rtx.c  */
1757
extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1758
                                           rtx, enum machine_mode);
1759
extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1760
                                     enum machine_mode);
1761
extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1762
                                            rtx, rtx);
1763
extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1764
                                      rtx);
1765
extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1766
                                       enum machine_mode, rtx, rtx, rtx);
1767
extern rtx simplify_const_relational_operation (enum rtx_code,
1768
                                                enum machine_mode, rtx, rtx);
1769
extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1770
                                          enum machine_mode, rtx, rtx);
1771
extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1772
extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1773
                               enum machine_mode);
1774
extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1775
                                 enum machine_mode, rtx, rtx, rtx);
1776
extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1777
                                    enum machine_mode, rtx, rtx);
1778
extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1779
                            unsigned int);
1780
extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1781
                                unsigned int);
1782
extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1783
                                    rtx (*fn) (rtx, const_rtx, void *), void *);
1784
extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1785
extern rtx simplify_rtx (const_rtx);
1786
extern rtx avoid_constant_pool_reference (rtx);
1787
extern rtx delegitimize_mem_from_attrs (rtx);
1788
extern bool mode_signbit_p (enum machine_mode, const_rtx);
1789
 
1790
/* In reginfo.c  */
1791
extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1792
                                               bool);
1793
 
1794
/* In emit-rtl.c  */
1795
extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1796
extern void set_insn_deleted (rtx);
1797
 
1798
/* Functions in rtlanal.c */
1799
 
1800
/* Single set is implemented as macro for performance reasons.  */
1801
#define single_set(I) (INSN_P (I) \
1802
                       ? (GET_CODE (PATTERN (I)) == SET \
1803
                          ? PATTERN (I) : single_set_1 (I)) \
1804
                       : NULL_RTX)
1805
#define single_set_1(I) single_set_2 (I, PATTERN (I))
1806
 
1807
/* Structure used for passing data to REPLACE_LABEL.  */
1808
typedef struct replace_label_data
1809
{
1810
  rtx r1;
1811
  rtx r2;
1812
  bool update_label_nuses;
1813
} replace_label_data;
1814
 
1815
extern int rtx_addr_can_trap_p (const_rtx);
1816
extern bool nonzero_address_p (const_rtx);
1817
extern int rtx_unstable_p (const_rtx);
1818
extern bool rtx_varies_p (const_rtx, bool);
1819
extern bool rtx_addr_varies_p (const_rtx, bool);
1820
extern HOST_WIDE_INT get_integer_term (const_rtx);
1821
extern rtx get_related_value (const_rtx);
1822
extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1823
extern void split_const (rtx, rtx *, rtx *);
1824
extern int reg_mentioned_p (const_rtx, const_rtx);
1825
extern int count_occurrences (const_rtx, const_rtx, int);
1826
extern int reg_referenced_p (const_rtx, const_rtx);
1827
extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1828
extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1829
extern int commutative_operand_precedence (rtx);
1830
extern bool swap_commutative_operands_p (rtx, rtx);
1831
extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1832
extern int no_labels_between_p (const_rtx, const_rtx);
1833
extern int modified_in_p (const_rtx, const_rtx);
1834
extern int reg_set_p (const_rtx, const_rtx);
1835
extern rtx single_set_2 (const_rtx, const_rtx);
1836
extern int multiple_sets (const_rtx);
1837
extern int set_noop_p (const_rtx);
1838
extern int noop_move_p (const_rtx);
1839
extern rtx find_last_value (rtx, rtx *, rtx, int);
1840
extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1841
extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1842
extern const_rtx set_of (const_rtx, const_rtx);
1843
extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1844
extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1845
extern int dead_or_set_p (const_rtx, const_rtx);
1846
extern int dead_or_set_regno_p (const_rtx, unsigned int);
1847
extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1848
extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1849
extern rtx find_reg_equal_equiv_note (const_rtx);
1850
extern rtx find_constant_src (const_rtx);
1851
extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1852
extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1853
extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1854
extern void add_reg_note (rtx, enum reg_note, rtx);
1855
extern void remove_note (rtx, const_rtx);
1856
extern void remove_reg_equal_equiv_notes (rtx);
1857
extern int side_effects_p (const_rtx);
1858
extern int volatile_refs_p (const_rtx);
1859
extern int volatile_insn_p (const_rtx);
1860
extern int may_trap_p_1 (const_rtx, unsigned);
1861
extern int may_trap_p (const_rtx);
1862
extern int may_trap_or_fault_p (const_rtx);
1863
extern bool can_throw_internal (const_rtx);
1864
extern bool can_throw_external (const_rtx);
1865
extern bool insn_could_throw_p (const_rtx);
1866
extern bool insn_nothrow_p (const_rtx);
1867
extern bool can_nonlocal_goto (const_rtx);
1868
extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1869
extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1870
extern int inequality_comparisons_p (const_rtx);
1871
extern rtx replace_rtx (rtx, rtx, rtx);
1872
extern int replace_label (rtx *, void *);
1873
extern int rtx_referenced_p (rtx, rtx);
1874
extern bool tablejump_p (const_rtx, rtx *, rtx *);
1875
extern int computed_jump_p (const_rtx);
1876
 
1877
typedef int (*rtx_function) (rtx *, void *);
1878
extern int for_each_rtx (rtx *, rtx_function, void *);
1879
 
1880
typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1881
                                              rtx *, rtx *);
1882
extern int rtx_equal_p_cb (const_rtx, const_rtx,
1883
                           rtx_equal_p_callback_function);
1884
 
1885
typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1886
                                           enum machine_mode *);
1887
extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1888
                             bool, hash_rtx_callback_function);
1889
 
1890
extern rtx regno_use_in (unsigned int, rtx);
1891
extern int auto_inc_p (const_rtx);
1892
extern int in_expr_list_p (const_rtx, const_rtx);
1893
extern void remove_node_from_expr_list (const_rtx, rtx *);
1894
extern int loc_mentioned_in_p (rtx *, const_rtx);
1895
extern rtx find_first_parameter_load (rtx, rtx);
1896
extern bool keep_with_call_p (const_rtx);
1897
extern bool label_is_jump_target_p (const_rtx, const_rtx);
1898
extern int insn_rtx_cost (rtx, bool);
1899
 
1900
/* Given an insn and condition, return a canonical description of
1901
   the test being made.  */
1902
extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1903
 
1904
/* Given a JUMP_INSN, return a canonical description of the test
1905
   being made.  */
1906
extern rtx get_condition (rtx, rtx *, int, int);
1907
 
1908
/* Information about a subreg of a hard register.  */
1909
struct subreg_info
1910
{
1911
  /* Offset of first hard register involved in the subreg.  */
1912
  int offset;
1913
  /* Number of hard registers involved in the subreg.  */
1914
  int nregs;
1915
  /* Whether this subreg can be represented as a hard reg with the new
1916
     mode.  */
1917
  bool representable_p;
1918
};
1919
 
1920
extern void subreg_get_info (unsigned int, enum machine_mode,
1921
                             unsigned int, enum machine_mode,
1922
                             struct subreg_info *);
1923
 
1924
/* lists.c */
1925
 
1926
extern void free_EXPR_LIST_list         (rtx *);
1927
extern void free_INSN_LIST_list         (rtx *);
1928
extern void free_EXPR_LIST_node         (rtx);
1929
extern void free_INSN_LIST_node         (rtx);
1930
extern rtx alloc_INSN_LIST                      (rtx, rtx);
1931
extern rtx alloc_EXPR_LIST                      (int, rtx, rtx);
1932
extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1933
extern rtx remove_list_elem (rtx, rtx *);
1934
extern rtx remove_free_INSN_LIST_node (rtx *);
1935
extern rtx remove_free_EXPR_LIST_node (rtx *);
1936
 
1937
 
1938
/* reginfo.c */
1939
 
1940
/* Initialize may_move_cost and friends for mode M.  */
1941
extern void init_move_cost (enum machine_mode);
1942
/* Resize reg info.  */
1943
extern bool resize_reg_info (void);
1944
/* Free up register info memory.  */
1945
extern void free_reg_info (void);
1946
extern void init_subregs_of_mode (void);
1947
extern void finish_subregs_of_mode (void);
1948
 
1949
/* recog.c */
1950
extern rtx extract_asm_operands (rtx);
1951
extern int asm_noperands (const_rtx);
1952
extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1953
                                        enum machine_mode *, location_t *);
1954
 
1955
extern enum reg_class reg_preferred_class (int);
1956
extern enum reg_class reg_alternate_class (int);
1957
extern enum reg_class reg_cover_class (int);
1958
extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1959
                               enum reg_class);
1960
 
1961
extern void split_all_insns (void);
1962
extern unsigned int split_all_insns_noflow (void);
1963
 
1964
#define MAX_SAVED_CONST_INT 64
1965
extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1966
 
1967
#define const0_rtx      (const_int_rtx[MAX_SAVED_CONST_INT])
1968
#define const1_rtx      (const_int_rtx[MAX_SAVED_CONST_INT+1])
1969
#define const2_rtx      (const_int_rtx[MAX_SAVED_CONST_INT+2])
1970
#define constm1_rtx     (const_int_rtx[MAX_SAVED_CONST_INT-1])
1971
extern GTY(()) rtx const_true_rtx;
1972
 
1973
extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1974
 
1975
/* Returns a constant 0 rtx in mode MODE.  Integer modes are treated the
1976
   same as VOIDmode.  */
1977
 
1978
#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1979
 
1980
/* Likewise, for the constants 1 and 2.  */
1981
 
1982
#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1983
#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1984
 
1985
/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1986
   is used to represent the frame pointer.  This is because the
1987
   hard frame pointer and the automatic variables are separated by an amount
1988
   that cannot be determined until after register allocation.  We can assume
1989
   that in this case ELIMINABLE_REGS will be defined, one action of which
1990
   will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM.  */
1991
#ifndef HARD_FRAME_POINTER_REGNUM
1992
#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1993
#endif
1994
 
1995
/* Index labels for global_rtl.  */
1996
enum global_rtl_index
1997
{
1998
  GR_PC,
1999
  GR_CC0,
2000
  GR_STACK_POINTER,
2001
  GR_FRAME_POINTER,
2002
/* For register elimination to work properly these hard_frame_pointer_rtx,
2003
   frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2004
   the same register.  */
2005
#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2006
  GR_ARG_POINTER = GR_FRAME_POINTER,
2007
#endif
2008
#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
2009
  GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2010
#else
2011
  GR_HARD_FRAME_POINTER,
2012
#endif
2013
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2014
#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2015
  GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2016
#else
2017
  GR_ARG_POINTER,
2018
#endif
2019
#endif
2020
  GR_VIRTUAL_INCOMING_ARGS,
2021
  GR_VIRTUAL_STACK_ARGS,
2022
  GR_VIRTUAL_STACK_DYNAMIC,
2023
  GR_VIRTUAL_OUTGOING_ARGS,
2024
  GR_VIRTUAL_CFA,
2025
 
2026
  GR_MAX
2027
};
2028
 
2029
/* Pointers to standard pieces of rtx are stored here.  */
2030
extern GTY(()) rtx global_rtl[GR_MAX];
2031
 
2032
/* Standard pieces of rtx, to be substituted directly into things.  */
2033
#define pc_rtx                  (global_rtl[GR_PC])
2034
#define cc0_rtx                 (global_rtl[GR_CC0])
2035
 
2036
/* All references to certain hard regs, except those created
2037
   by allocating pseudo regs into them (when that's possible),
2038
   go through these unique rtx objects.  */
2039
#define stack_pointer_rtx       (global_rtl[GR_STACK_POINTER])
2040
#define frame_pointer_rtx       (global_rtl[GR_FRAME_POINTER])
2041
#define hard_frame_pointer_rtx  (global_rtl[GR_HARD_FRAME_POINTER])
2042
#define arg_pointer_rtx         (global_rtl[GR_ARG_POINTER])
2043
 
2044
extern GTY(()) rtx pic_offset_table_rtx;
2045
extern GTY(()) rtx return_address_pointer_rtx;
2046
 
2047
/* Include the RTL generation functions.  */
2048
 
2049
#ifndef GENERATOR_FILE
2050
#include "genrtl.h"
2051
#undef gen_rtx_ASM_INPUT
2052
#define gen_rtx_ASM_INPUT(MODE, ARG0)                           \
2053
  gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2054
#define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC)                  \
2055
  gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2056
#endif
2057
 
2058
/* There are some RTL codes that require special attention; the
2059
   generation functions included above do the raw handling.  If you
2060
   add to this list, modify special_rtx in gengenrtl.c as well.  */
2061
 
2062
extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2063
extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2064
extern rtx gen_raw_REG (enum machine_mode, int);
2065
extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2066
extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2067
extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2068
 
2069
#define GEN_INT(N)  gen_rtx_CONST_INT (VOIDmode, (N))
2070
 
2071
/* Virtual registers are used during RTL generation to refer to locations into
2072
   the stack frame when the actual location isn't known until RTL generation
2073
   is complete.  The routine instantiate_virtual_regs replaces these with
2074
   the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2075
   a constant.  */
2076
 
2077
#define FIRST_VIRTUAL_REGISTER  (FIRST_PSEUDO_REGISTER)
2078
 
2079
/* This points to the first word of the incoming arguments passed on the stack,
2080
   either by the caller or by the callee when pretending it was passed by the
2081
   caller.  */
2082
 
2083
#define virtual_incoming_args_rtx       (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2084
 
2085
#define VIRTUAL_INCOMING_ARGS_REGNUM    (FIRST_VIRTUAL_REGISTER)
2086
 
2087
/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2088
   variable on the stack.  Otherwise, it points to the first variable on
2089
   the stack.  */
2090
 
2091
#define virtual_stack_vars_rtx          (global_rtl[GR_VIRTUAL_STACK_ARGS])
2092
 
2093
#define VIRTUAL_STACK_VARS_REGNUM       ((FIRST_VIRTUAL_REGISTER) + 1)
2094
 
2095
/* This points to the location of dynamically-allocated memory on the stack
2096
   immediately after the stack pointer has been adjusted by the amount
2097
   desired.  */
2098
 
2099
#define virtual_stack_dynamic_rtx       (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2100
 
2101
#define VIRTUAL_STACK_DYNAMIC_REGNUM    ((FIRST_VIRTUAL_REGISTER) + 2)
2102
 
2103
/* This points to the location in the stack at which outgoing arguments should
2104
   be written when the stack is pre-pushed (arguments pushed using push
2105
   insns always use sp).  */
2106
 
2107
#define virtual_outgoing_args_rtx       (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2108
 
2109
#define VIRTUAL_OUTGOING_ARGS_REGNUM    ((FIRST_VIRTUAL_REGISTER) + 3)
2110
 
2111
/* This points to the Canonical Frame Address of the function.  This
2112
   should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2113
   but is calculated relative to the arg pointer for simplicity; the
2114
   frame pointer nor stack pointer are necessarily fixed relative to
2115
   the CFA until after reload.  */
2116
 
2117
#define virtual_cfa_rtx                 (global_rtl[GR_VIRTUAL_CFA])
2118
 
2119
#define VIRTUAL_CFA_REGNUM              ((FIRST_VIRTUAL_REGISTER) + 4)
2120
 
2121
#define LAST_VIRTUAL_REGISTER           ((FIRST_VIRTUAL_REGISTER) + 4)
2122
 
2123
/* Nonzero if REGNUM is a pointer into the stack frame.  */
2124
#define REGNO_PTR_FRAME_P(REGNUM)               \
2125
  ((REGNUM) == STACK_POINTER_REGNUM             \
2126
   || (REGNUM) == FRAME_POINTER_REGNUM          \
2127
   || (REGNUM) == HARD_FRAME_POINTER_REGNUM     \
2128
   || (REGNUM) == ARG_POINTER_REGNUM            \
2129
   || ((REGNUM) >= FIRST_VIRTUAL_REGISTER       \
2130
       && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2131
 
2132
/* REGNUM never really appearing in the INSN stream.  */
2133
#define INVALID_REGNUM                  (~(unsigned int) 0)
2134
 
2135
extern rtx output_constant_def (tree, int);
2136
extern rtx lookup_constant_def (tree);
2137
 
2138
/* Nonzero after end of reload pass.
2139
   Set to 1 or 0 by reload1.c.  */
2140
 
2141
extern int reload_completed;
2142
 
2143
/* Nonzero after thread_prologue_and_epilogue_insns has run.  */
2144
extern int epilogue_completed;
2145
 
2146
/* Set to 1 while reload_as_needed is operating.
2147
   Required by some machines to handle any generated moves differently.  */
2148
 
2149
extern int reload_in_progress;
2150
 
2151
/* This macro indicates whether you may create a new
2152
   pseudo-register.  */
2153
 
2154
#define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2155
 
2156
#ifdef STACK_REGS
2157
/* Nonzero after end of regstack pass.
2158
   Set to 1 or 0 by reg-stack.c.  */
2159
extern int regstack_completed;
2160
#endif
2161
 
2162
/* If this is nonzero, we do not bother generating VOLATILE
2163
   around volatile memory references, and we are willing to
2164
   output indirect addresses.  If cse is to follow, we reject
2165
   indirect addresses so a useful potential cse is generated;
2166
   if it is used only once, instruction combination will produce
2167
   the same indirect address eventually.  */
2168
extern int cse_not_expected;
2169
 
2170
/* Translates rtx code to tree code, for those codes needed by
2171
   REAL_ARITHMETIC.  The function returns an int because the caller may not
2172
   know what `enum tree_code' means.  */
2173
 
2174
extern int rtx_to_tree_code (enum rtx_code);
2175
 
2176
/* In cse.c */
2177
extern int delete_trivially_dead_insns (rtx, int);
2178
extern int cse_main (rtx, int);
2179
extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2180
extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2181
 
2182
/* In jump.c */
2183
extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2184
extern int condjump_p (const_rtx);
2185
extern int any_condjump_p (const_rtx);
2186
extern int any_uncondjump_p (const_rtx);
2187
extern rtx pc_set (const_rtx);
2188
extern rtx condjump_label (const_rtx);
2189
extern int simplejump_p (const_rtx);
2190
extern int returnjump_p (rtx);
2191
extern int eh_returnjump_p (rtx);
2192
extern int onlyjump_p (const_rtx);
2193
extern int only_sets_cc0_p (const_rtx);
2194
extern int sets_cc0_p (const_rtx);
2195
extern int invert_jump_1 (rtx, rtx);
2196
extern int invert_jump (rtx, rtx, int);
2197
extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2198
extern int true_regnum (const_rtx);
2199
extern unsigned int reg_or_subregno (const_rtx);
2200
extern int redirect_jump_1 (rtx, rtx);
2201
extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2202
extern int redirect_jump (rtx, rtx, int);
2203
extern void rebuild_jump_labels (rtx);
2204
extern rtx reversed_comparison (const_rtx, enum machine_mode);
2205
extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2206
extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2207
                                                     const_rtx, const_rtx);
2208
extern void delete_for_peephole (rtx, rtx);
2209
extern int condjump_in_parallel_p (const_rtx);
2210
 
2211
/* In emit-rtl.c.  */
2212
extern int max_reg_num (void);
2213
extern int max_label_num (void);
2214
extern int get_first_label_num (void);
2215
extern void maybe_set_first_label_num (rtx);
2216
extern void delete_insns_since (rtx);
2217
extern void mark_reg_pointer (rtx, int);
2218
extern void mark_user_reg (rtx);
2219
extern void reset_used_flags (rtx);
2220
extern void set_used_flags (rtx);
2221
extern void reorder_insns (rtx, rtx, rtx);
2222
extern void reorder_insns_nobb (rtx, rtx, rtx);
2223
extern int get_max_uid (void);
2224
extern int get_max_insn_count (void);
2225
extern int in_sequence_p (void);
2226
extern void force_next_line_note (void);
2227
extern void init_emit (void);
2228
extern void init_emit_regs (void);
2229
extern void init_emit_once (void);
2230
extern void push_topmost_sequence (void);
2231
extern void pop_topmost_sequence (void);
2232
extern void set_new_first_and_last_insn (rtx, rtx);
2233
extern unsigned int unshare_all_rtl (void);
2234
extern void unshare_all_rtl_again (rtx);
2235
extern void unshare_all_rtl_in_chain (rtx);
2236
extern void verify_rtl_sharing (void);
2237
extern void set_first_insn (rtx);
2238
extern void set_last_insn (rtx);
2239
extern void link_cc0_insns (rtx);
2240
extern void add_insn (rtx);
2241
extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2242
extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2243
extern void remove_insn (rtx);
2244
extern rtx emit (rtx);
2245
extern rtx delete_insn (rtx);
2246
extern rtx entry_of_function (void);
2247
extern void emit_insn_at_entry (rtx);
2248
extern void delete_insn_chain (rtx, rtx, bool);
2249
extern rtx unlink_insn_chain (rtx, rtx);
2250
extern rtx delete_insn_and_edges (rtx);
2251
extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2252
extern rtx gen_const_mem (enum machine_mode, rtx);
2253
extern rtx gen_frame_mem (enum machine_mode, rtx);
2254
extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2255
extern bool validate_subreg (enum machine_mode, enum machine_mode,
2256
                             const_rtx, unsigned int);
2257
 
2258
/* In combine.c  */
2259
extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2260
extern rtx remove_death (unsigned int, rtx);
2261
extern void dump_combine_stats (FILE *);
2262
extern void dump_combine_total_stats (FILE *);
2263
 
2264
/* In cfgcleanup.c  */
2265
extern void delete_dead_jumptables (void);
2266
 
2267
/* In sched-vis.c.  */
2268
extern void debug_bb_n_slim (int);
2269
extern void debug_bb_slim (struct basic_block_def *);
2270
extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2271
extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2272
extern void dump_insn_slim (FILE *f, rtx x);
2273
extern void debug_insn_slim (rtx x);
2274
 
2275
/* In sched-rgn.c.  */
2276
extern void schedule_insns (void);
2277
 
2278
/* In sched-ebb.c.  */
2279
extern void schedule_ebbs (void);
2280
 
2281
/* In haifa-sched.c.  */
2282
extern void fix_sched_param (const char *, const char *);
2283
 
2284
/* In sel-sched-dump.c.  */
2285
extern void sel_sched_fix_param (const char *param, const char *val);
2286
 
2287
/* In print-rtl.c */
2288
extern const char *print_rtx_head;
2289
extern void debug_rtx (const_rtx);
2290
extern void debug_rtx_list (const_rtx, int);
2291
extern void debug_rtx_range (const_rtx, const_rtx);
2292
extern const_rtx debug_rtx_find (const_rtx, int);
2293
extern void print_mem_expr (FILE *, const_tree);
2294
extern void print_rtl (FILE *, const_rtx);
2295
extern void print_simple_rtl (FILE *, const_rtx);
2296
extern int print_rtl_single (FILE *, const_rtx);
2297
extern void print_inline_rtx (FILE *, const_rtx, int);
2298
 
2299
/* In function.c */
2300
extern void reposition_prologue_and_epilogue_notes (void);
2301
extern int prologue_epilogue_contains (const_rtx);
2302
extern int sibcall_epilogue_contains (const_rtx);
2303
extern void mark_temp_addr_taken (rtx);
2304
extern void update_temp_slot_address (rtx, rtx);
2305
extern void maybe_copy_epilogue_insn (rtx, rtx);
2306
 
2307
/* In stmt.c */
2308
extern void expand_null_return (void);
2309
extern void expand_naked_return (void);
2310
extern void emit_jump (rtx);
2311
 
2312
/* In expr.c */
2313
extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2314
                           unsigned int, int);
2315
 
2316
/* In cfgrtl.c */
2317
extern void print_rtl_with_bb (FILE *, const_rtx);
2318
 
2319
/* In cfg.c.  */
2320
extern void dump_reg_info (FILE *);
2321
extern void dump_flow_info (FILE *, int);
2322
 
2323
/* In expmed.c */
2324
extern void init_expmed (void);
2325
extern void expand_inc (rtx, rtx);
2326
extern void expand_dec (rtx, rtx);
2327
 
2328
/* In gcse.c */
2329
extern bool can_copy_p (enum machine_mode);
2330
extern bool can_assign_to_reg_without_clobbers_p (rtx);
2331
extern rtx fis_get_condition (rtx);
2332
 
2333
/* In ira.c */
2334
#ifdef HARD_CONST
2335
extern HARD_REG_SET eliminable_regset;
2336
#endif
2337
extern void mark_elimination (int, int);
2338
 
2339
/* In reginfo.c */
2340
extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2341
extern int reg_class_subset_p (enum reg_class, enum reg_class);
2342
extern void globalize_reg (int);
2343
extern void init_reg_modes_target (void);
2344
extern void init_regs (void);
2345
extern void reinit_regs (void);
2346
extern void init_fake_stack_mems (void);
2347
extern void save_register_info (void);
2348
extern void init_reg_sets (void);
2349
extern void regclass (rtx, int);
2350
extern void reg_scan (rtx, unsigned int);
2351
extern void fix_register (const char *, int, int);
2352
extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2353
                                   enum machine_mode);
2354
 
2355
/* In reorg.c */
2356
extern void dbr_schedule (rtx);
2357
 
2358
/* In reload1.c */
2359
extern int function_invariant_p (const_rtx);
2360
 
2361
/* In calls.c */
2362
enum libcall_type
2363
{
2364
  LCT_NORMAL = 0,
2365
  LCT_CONST = 1,
2366
  LCT_PURE = 2,
2367
  LCT_NORETURN = 3,
2368
  LCT_THROW = 4,
2369
  LCT_RETURNS_TWICE = 5
2370
};
2371
 
2372
extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2373
                               ...);
2374
extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2375
                                    enum machine_mode, int, ...);
2376
 
2377
/* In varasm.c */
2378
extern void init_varasm_once (void);
2379
extern enum tls_model decl_default_tls_model (const_tree);
2380
 
2381
/* In rtl.c */
2382
extern void traverse_md_constants (int (*) (void **, void *), void *);
2383
struct md_constant { char *name, *value; };
2384
 
2385
/* In read-rtl.c */
2386
extern int read_skip_spaces (FILE *);
2387
extern bool read_rtx (FILE *, rtx *, int *);
2388
extern void copy_rtx_ptr_loc (const void *, const void *);
2389
extern void print_rtx_ptr_loc (const void *);
2390
extern const char *join_c_conditions (const char *, const char *);
2391
extern void print_c_condition (const char *);
2392
extern const char *read_rtx_filename;
2393
extern int read_rtx_lineno;
2394
 
2395
/* In alias.c */
2396
extern rtx canon_rtx (rtx);
2397
extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2398
extern rtx get_addr (rtx);
2399
extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2400
                                  rtx, bool (*)(const_rtx, bool));
2401
extern int read_dependence (const_rtx, const_rtx);
2402
extern int anti_dependence (const_rtx, const_rtx);
2403
extern int output_dependence (const_rtx, const_rtx);
2404
extern void init_alias_target (void);
2405
extern void init_alias_analysis (void);
2406
extern void end_alias_analysis (void);
2407
extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2408
extern rtx find_base_term (rtx);
2409
extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2410
extern rtx get_reg_known_value (unsigned int);
2411
extern bool get_reg_known_equiv_p (unsigned int);
2412
 
2413
#ifdef STACK_REGS
2414
extern int stack_regs_mentioned (const_rtx insn);
2415
#endif
2416
 
2417
/* In toplev.c */
2418
extern GTY(()) rtx stack_limit_rtx;
2419
 
2420
/* In predict.c */
2421
extern void invert_br_probabilities (rtx);
2422
extern bool expensive_function_p (int);
2423
 
2424
/* In var-tracking.c */
2425
extern unsigned int variable_tracking_main (void);
2426
 
2427
/* In stor-layout.c.  */
2428
extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2429
                             rtx *, rtx *);
2430
 
2431
/* In loop-unswitch.c  */
2432
extern rtx reversed_condition (rtx);
2433
extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2434
 
2435
/* In loop-iv.c  */
2436
extern rtx canon_condition (rtx);
2437
extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2438
 
2439
/* In final.c  */
2440
extern unsigned int compute_alignments (void);
2441
extern int asm_str_count (const char *templ);
2442
 
2443
struct rtl_hooks
2444
{
2445
  rtx (*gen_lowpart) (enum machine_mode, rtx);
2446
  rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2447
  rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2448
                           unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2449
  rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2450
                                  unsigned int, unsigned int *);
2451
  bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2452
 
2453
  /* Whenever you add entries here, make sure you adjust rtlhooks-def.h.  */
2454
};
2455
 
2456
/* Each pass can provide its own.  */
2457
extern struct rtl_hooks rtl_hooks;
2458
 
2459
/* ... but then it has to restore these.  */
2460
extern const struct rtl_hooks general_rtl_hooks;
2461
 
2462
/* Keep this for the nonce.  */
2463
#define gen_lowpart rtl_hooks.gen_lowpart
2464
 
2465
extern void insn_locators_alloc (void);
2466
extern void insn_locators_free (void);
2467
extern void insn_locators_finalize (void);
2468
extern void set_curr_insn_source_location (location_t);
2469
extern location_t get_curr_insn_source_location (void);
2470
extern void set_curr_insn_block (tree);
2471
extern tree get_curr_insn_block (void);
2472
extern int curr_insn_locator (void);
2473
extern bool optimize_insn_for_size_p (void);
2474
extern bool optimize_insn_for_speed_p (void);
2475
 
2476
#endif /* ! GCC_RTL_H */

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