GCC Middle and Back End API Reference
rtl.h
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1 /* Register Transfer Language (RTL) definitions for GCC
2  Copyright (C) 1987-2013 Free Software Foundation, Inc.
3 
4 This file is part of GCC.
5 
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10 
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19 
20 #ifndef GCC_RTL_H
21 #define GCC_RTL_H
22 
23 #include "statistics.h"
24 #include "machmode.h"
25 #include "input.h"
26 #include "real.h"
27 #include "vec.h"
28 #include "fixed-value.h"
29 #include "alias.h"
30 #include "hashtab.h"
31 #include "flags.h"
32 
33 /* Value used by some passes to "recognize" noop moves as valid
34  instructions. */
35 #define NOOP_MOVE_INSN_CODE INT_MAX
36 
37 /* Register Transfer Language EXPRESSIONS CODES */
38 
39 #define RTX_CODE enum rtx_code
40 enum rtx_code {
41 
42 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
43 #include "rtl.def" /* rtl expressions are documented here */
44 #undef DEF_RTL_EXPR
45 
46  LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
47  NUM_RTX_CODE.
48  Assumes default enum value assignment. */
49 
50 /* The cast here, saves many elsewhere. */
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 
53 /* Similar, but since generator files get more entries... */
54 #ifdef GENERATOR_FILE
55 # define NON_GENERATOR_NUM_RTX_CODE ((int) MATCH_OPERAND)
56 #endif
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. */
138 typedef struct GTY(()) mem_attrs
139 {
140  /* The expression that the MEM accesses, or null if not known.
141  This expression might be larger than the memory reference itself.
142  (In other words, the MEM might access only part of the object.) */
143  tree expr;
144 
145  /* The offset of the memory reference from the start of EXPR.
146  Only valid if OFFSET_KNOWN_P. */
147  HOST_WIDE_INT offset;
148 
149  /* The size of the memory reference in bytes. Only valid if
150  SIZE_KNOWN_P. */
151  HOST_WIDE_INT size;
152 
153  /* The alias set of the memory reference. */
154  alias_set_type alias;
155 
156  /* The alignment of the reference in bits. Always a multiple of
157  BITS_PER_UNIT. Note that EXPR may have a stricter alignment
158  than the memory reference itself. */
159  unsigned int align;
160 
161  /* The address space that the memory reference uses. */
162  unsigned char addrspace;
163 
164  /* True if OFFSET is known. */
165  bool offset_known_p;
166 
167  /* True if SIZE is known. */
168  bool size_known_p;
169 } mem_attrs;
170 
171 /* Structure used to describe the attributes of a REG in similar way as
172  mem_attrs does for MEM above. Note that the OFFSET field is calculated
173  in the same way as for mem_attrs, rather than in the same way as a
174  SUBREG_BYTE. For example, if a big-endian target stores a byte
175  object in the low part of a 4-byte register, the OFFSET field
176  will be -3 rather than 0. */
177 
178 typedef struct GTY(()) reg_attrs {
179  tree decl; /* decl corresponding to REG. */
180  HOST_WIDE_INT offset; /* Offset from start of DECL. */
181 } reg_attrs;
182 
183 /* Common union for an element of an rtx. */
184 
185 union rtunion_def
186 {
187  int rt_int;
188  unsigned int rt_uint;
189  const char *rt_str;
190  rtx rt_rtx;
191  rtvec rt_rtvec;
192  enum machine_mode rt_type;
193  addr_diff_vec_flags rt_addr_diff_vec_flags;
194  struct cselib_val_struct *rt_cselib;
195  tree rt_tree;
196  basic_block rt_bb;
197  mem_attrs *rt_mem;
198  reg_attrs *rt_reg;
199  struct constant_descriptor_rtx *rt_constant;
200  struct dw_cfi_struct *rt_cfi;
201 };
202 typedef union rtunion_def rtunion;
203 
204 /* This structure remembers the position of a SYMBOL_REF within an
205  object_block structure. A SYMBOL_REF only provides this information
206  if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
207 struct GTY(()) block_symbol {
208  /* The usual SYMBOL_REF fields. */
209  rtunion GTY ((skip)) fld[3];
210 
211  /* The block that contains this object. */
212  struct object_block *block;
213 
214  /* The offset of this object from the start of its block. It is negative
215  if the symbol has not yet been assigned an offset. */
216  HOST_WIDE_INT offset;
217 };
218 
219 /* Describes a group of objects that are to be placed together in such
220  a way that their relative positions are known. */
221 struct GTY(()) object_block {
222  /* The section in which these objects should be placed. */
223  section *sect;
224 
225  /* The alignment of the first object, measured in bits. */
226  unsigned int alignment;
227 
228  /* The total size of the objects, measured in bytes. */
229  HOST_WIDE_INT size;
230 
231  /* The SYMBOL_REFs for each object. The vector is sorted in
232  order of increasing offset and the following conditions will
233  hold for each element X:
234 
235  SYMBOL_REF_HAS_BLOCK_INFO_P (X)
236  !SYMBOL_REF_ANCHOR_P (X)
237  SYMBOL_REF_BLOCK (X) == [address of this structure]
238  SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
239  vec<rtx, va_gc> *objects;
240 
241  /* All the anchor SYMBOL_REFs used to address these objects, sorted
242  in order of increasing offset, and then increasing TLS model.
243  The following conditions will hold for each element X in this vector:
244 
245  SYMBOL_REF_HAS_BLOCK_INFO_P (X)
246  SYMBOL_REF_ANCHOR_P (X)
247  SYMBOL_REF_BLOCK (X) == [address of this structure]
248  SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
249  vec<rtx, va_gc> *anchors;
250 };
251 
252 /* RTL expression ("rtx"). */
253 
254 struct GTY((chain_next ("RTX_NEXT (&%h)"),
255  chain_prev ("RTX_PREV (&%h)"), variable_size)) rtx_def {
256  /* The kind of expression this is. */
257  ENUM_BITFIELD(rtx_code) code: 16;
258 
259  /* The kind of value the expression has. */
260  ENUM_BITFIELD(machine_mode) mode : 8;
261 
262  /* 1 in a MEM if we should keep the alias set for this mem unchanged
263  when we access a component.
264  1 in a CALL_INSN if it is a sibling call.
265  1 in a SET that is for a return.
266  In a CODE_LABEL, part of the two-bit alternate entry field.
267  1 in a CONCAT is VAL_EXPR_IS_COPIED in var-tracking.c.
268  1 in a VALUE is SP_BASED_VALUE_P in cselib.c.
269  1 in a SUBREG generated by LRA for reload insns. */
270  unsigned int jump : 1;
271  /* In a CODE_LABEL, part of the two-bit alternate entry field.
272  1 in a MEM if it cannot trap.
273  1 in a CALL_INSN logically equivalent to
274  ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
275  unsigned int call : 1;
276  /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
277  1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
278  1 in a SYMBOL_REF if it addresses something in the per-function
279  constants pool.
280  1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
281  1 in a NOTE, or EXPR_LIST for a const call.
282  1 in a JUMP_INSN of an annulling branch.
283  1 in a CONCAT is VAL_EXPR_IS_CLOBBERED in var-tracking.c.
284  1 in a preserved VALUE is PRESERVED_VALUE_P in cselib.c.
285  1 in a clobber temporarily created for LRA. */
286  unsigned int unchanging : 1;
287  /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
288  1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
289  if it has been deleted.
290  1 in a REG expression if corresponds to a variable declared by the user,
291  0 for an internally generated temporary.
292  1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
293  1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
294  non-local label.
295  In a SYMBOL_REF, this flag is used for machine-specific purposes.
296  In a PREFETCH, this flag indicates that it should be considered a scheduling
297  barrier.
298  1 in a CONCAT is VAL_NEEDS_RESOLUTION in var-tracking.c. */
299  unsigned int volatil : 1;
300  /* 1 in a REG if the register is used only in exit code a loop.
301  1 in a SUBREG expression if was generated from a variable with a
302  promoted mode.
303  1 in a CODE_LABEL if the label is used for nonlocal gotos
304  and must not be deleted even if its count is zero.
305  1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
306  together with the preceding insn. Valid only within sched.
307  1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
308  from the target of a branch. Valid from reorg until end of compilation;
309  cleared before used.
310 
311  The name of the field is historical. It used to be used in MEMs
312  to record whether the MEM accessed part of a structure. */
313  unsigned int in_struct : 1;
314  /* At the end of RTL generation, 1 if this rtx is used. This is used for
315  copying shared structure. See `unshare_all_rtl'.
316  In a REG, this is not needed for that purpose, and used instead
317  in `leaf_renumber_regs_insn'.
318  1 in a SYMBOL_REF, means that emit_library_call
319  has used it as the function.
320  1 in a CONCAT is VAL_HOLDS_TRACK_EXPR in var-tracking.c.
321  1 in a VALUE or DEBUG_EXPR is VALUE_RECURSED_INTO in var-tracking.c. */
322  unsigned int used : 1;
323  /* 1 in an INSN or a SET if this rtx is related to the call frame,
324  either changing how we compute the frame address or saving and
325  restoring registers in the prologue and epilogue.
326  1 in a REG or MEM if it is a pointer.
327  1 in a SYMBOL_REF if it addresses something in the per-function
328  constant string pool.
329  1 in a VALUE is VALUE_CHANGED in var-tracking.c. */
330  unsigned frame_related : 1;
331  /* 1 in a REG or PARALLEL that is the current function's return value.
332  1 in a SYMBOL_REF for a weak symbol.
333  1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P.
334  1 in a CONCAT is VAL_EXPR_HAS_REVERSE in var-tracking.c.
335  1 in a VALUE or DEBUG_EXPR is NO_LOC_P in var-tracking.c. */
336  unsigned return_val : 1;
337 
338  /* The first element of the operands of this rtx.
339  The number of operands and their types are controlled
340  by the `code' field, according to rtl.def. */
341  union u {
342  rtunion fld[1];
343  HOST_WIDE_INT hwint[1];
344  struct block_symbol block_sym;
345  struct real_value rv;
346  struct fixed_value fv;
347  } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
348 };
349 
350 /* The size in bytes of an rtx header (code, mode and flags). */
351 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
352 
353 /* The size in bytes of an rtx with code CODE. */
354 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
355 
356 #define NULL_RTX (rtx) 0
357 
358 /* The "next" and "previous" RTX, relative to this one. */
359 
360 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
361  : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
362 
363 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
364  */
365 #define RTX_PREV(X) ((INSN_P (X) \
366  || NOTE_P (X) \
367  || JUMP_TABLE_DATA_P (X) \
368  || BARRIER_P (X) \
369  || LABEL_P (X)) \
370  && PREV_INSN (X) != NULL \
371  && NEXT_INSN (PREV_INSN (X)) == X \
372  ? PREV_INSN (X) : NULL)
373 
374 /* Define macros to access the `code' field of the rtx. */
375 
376 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
377 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
378 
379 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
380 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
381 
382 /* RTL vector. These appear inside RTX's when there is a need
383  for a variable number of things. The principle use is inside
384  PARALLEL expressions. */
385 
386 struct GTY((variable_size)) rtvec_def {
387  int num_elem; /* number of elements */
388  rtx GTY ((length ("%h.num_elem"))) elem[1];
389 };
390 
391 #define NULL_RTVEC (rtvec) 0
392 
393 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
394 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
395 
396 /* Predicate yielding nonzero iff X is an rtx for a register. */
397 #define REG_P(X) (GET_CODE (X) == REG)
398 
399 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
400 #define MEM_P(X) (GET_CODE (X) == MEM)
401 
402 /* Match CONST_*s that can represent compile-time constant integers. */
403 #define CASE_CONST_SCALAR_INT \
404  case CONST_INT: \
405  case CONST_DOUBLE
406 
407 /* Match CONST_*s for which pointer equality corresponds to value equality. */
408 #define CASE_CONST_UNIQUE \
409  case CONST_INT: \
410  case CONST_DOUBLE: \
411  case CONST_FIXED
412 
413 /* Match all CONST_* rtxes. */
414 #define CASE_CONST_ANY \
415  case CONST_INT: \
416  case CONST_DOUBLE: \
417  case CONST_FIXED: \
418  case CONST_VECTOR
419 
420 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
421 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
422 
423 /* Predicate yielding nonzero iff X is an rtx for a constant fixed-point. */
424 #define CONST_FIXED_P(X) (GET_CODE (X) == CONST_FIXED)
425 
426 /* Predicate yielding true iff X is an rtx for a double-int
427  or floating point constant. */
428 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
429 
430 /* Predicate yielding true iff X is an rtx for a double-int. */
431 #define CONST_DOUBLE_AS_INT_P(X) \
432  (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == VOIDmode)
433 
434 /* Predicate yielding true iff X is an rtx for a integer const. */
435 #define CONST_SCALAR_INT_P(X) \
436  (CONST_INT_P (X) || CONST_DOUBLE_AS_INT_P (X))
437 
438 /* Predicate yielding true iff X is an rtx for a double-int. */
439 #define CONST_DOUBLE_AS_FLOAT_P(X) \
440  (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != VOIDmode)
441 
442 /* Predicate yielding nonzero iff X is a label insn. */
443 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
444 
445 /* Predicate yielding nonzero iff X is a jump insn. */
446 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
447 
448 /* Predicate yielding nonzero iff X is a call insn. */
449 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
450 
451 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
452 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
453 
454 /* Predicate yielding nonzero iff X is a debug note/insn. */
455 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
456 
457 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
458 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
459 
460 /* Nonzero if DEBUG_INSN_P may possibly hold. */
461 #define MAY_HAVE_DEBUG_INSNS (flag_var_tracking_assignments)
462 
463 /* Predicate yielding nonzero iff X is a real insn. */
464 #define INSN_P(X) \
465  (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
466 
467 /* Predicate yielding nonzero iff X is a note insn. */
468 #define NOTE_P(X) (GET_CODE (X) == NOTE)
469 
470 /* Predicate yielding nonzero iff X is a barrier insn. */
471 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
472 
473 /* Predicate yielding nonzero iff X is a data for a jump table. */
474 #define JUMP_TABLE_DATA_P(INSN) (GET_CODE (INSN) == JUMP_TABLE_DATA)
475 
476 /* Predicate yielding nonzero iff X is a return or simple_return. */
477 #define ANY_RETURN_P(X) \
478  (GET_CODE (X) == RETURN || GET_CODE (X) == SIMPLE_RETURN)
479 
480 /* 1 if X is a unary operator. */
481 
482 #define UNARY_P(X) \
483  (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
484 
485 /* 1 if X is a binary operator. */
486 
487 #define BINARY_P(X) \
488  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
489 
490 /* 1 if X is an arithmetic operator. */
491 
492 #define ARITHMETIC_P(X) \
493  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
494  == RTX_ARITHMETIC_RESULT)
495 
496 /* 1 if X is an arithmetic operator. */
497 
498 #define COMMUTATIVE_ARITH_P(X) \
499  (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
500 
501 /* 1 if X is a commutative arithmetic operator or a comparison operator.
502  These two are sometimes selected together because it is possible to
503  swap the two operands. */
504 
505 #define SWAPPABLE_OPERANDS_P(X) \
506  ((1 << GET_RTX_CLASS (GET_CODE (X))) \
507  & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
508  | (1 << RTX_COMPARE)))
509 
510 /* 1 if X is a non-commutative operator. */
511 
512 #define NON_COMMUTATIVE_P(X) \
513  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
514  == RTX_NON_COMMUTATIVE_RESULT)
515 
516 /* 1 if X is a commutative operator on integers. */
517 
518 #define COMMUTATIVE_P(X) \
519  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
520  == RTX_COMMUTATIVE_RESULT)
521 
522 /* 1 if X is a relational operator. */
523 
524 #define COMPARISON_P(X) \
525  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
526 
527 /* 1 if X is a constant value that is an integer. */
528 
529 #define CONSTANT_P(X) \
530  (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
531 
532 /* 1 if X can be used to represent an object. */
533 #define OBJECT_P(X) \
534  ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
535 
536 /* General accessor macros for accessing the fields of an rtx. */
537 
538 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
539 /* The bit with a star outside the statement expr and an & inside is
540  so that N can be evaluated only once. */
541 #define RTL_CHECK1(RTX, N, C1) __extension__ \
542 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
543  const enum rtx_code _code = GET_CODE (_rtx); \
544  if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
545  rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
546  __FUNCTION__); \
547  if (GET_RTX_FORMAT(_code)[_n] != C1) \
548  rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
549  __FUNCTION__); \
550  &_rtx->u.fld[_n]; }))
551 
552 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
553 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
554  const enum rtx_code _code = GET_CODE (_rtx); \
555  if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
556  rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
557  __FUNCTION__); \
558  if (GET_RTX_FORMAT(_code)[_n] != C1 \
559  && GET_RTX_FORMAT(_code)[_n] != C2) \
560  rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
561  __FUNCTION__); \
562  &_rtx->u.fld[_n]; }))
563 
564 #define RTL_CHECKC1(RTX, N, C) __extension__ \
565 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
566  if (GET_CODE (_rtx) != (C)) \
567  rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
568  __FUNCTION__); \
569  &_rtx->u.fld[_n]; }))
570 
571 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
572 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
573  const enum rtx_code _code = GET_CODE (_rtx); \
574  if (_code != (C1) && _code != (C2)) \
575  rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
576  __FUNCTION__); \
577  &_rtx->u.fld[_n]; }))
578 
579 #define RTVEC_ELT(RTVEC, I) __extension__ \
580 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
581  if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
582  rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
583  __FUNCTION__); \
584  &_rtvec->elem[_i]; }))
585 
586 #define XWINT(RTX, N) __extension__ \
587 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
588  const enum rtx_code _code = GET_CODE (_rtx); \
589  if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
590  rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
591  __FUNCTION__); \
592  if (GET_RTX_FORMAT(_code)[_n] != 'w') \
593  rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
594  __FUNCTION__); \
595  &_rtx->u.hwint[_n]; }))
596 
597 #define XCWINT(RTX, N, C) __extension__ \
598 (*({ __typeof (RTX) const _rtx = (RTX); \
599  if (GET_CODE (_rtx) != (C)) \
600  rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
601  __FUNCTION__); \
602  &_rtx->u.hwint[N]; }))
603 
604 #define XCMWINT(RTX, N, C, M) __extension__ \
605 (*({ __typeof (RTX) const _rtx = (RTX); \
606  if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
607  rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
608  __LINE__, __FUNCTION__); \
609  &_rtx->u.hwint[N]; }))
610 
611 #define XCNMPRV(RTX, C, M) __extension__ \
612 ({ __typeof (RTX) const _rtx = (RTX); \
613  if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
614  rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
615  __LINE__, __FUNCTION__); \
616  &_rtx->u.rv; })
617 
618 #define XCNMPFV(RTX, C, M) __extension__ \
619 ({ __typeof (RTX) const _rtx = (RTX); \
620  if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
621  rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
622  __LINE__, __FUNCTION__); \
623  &_rtx->u.fv; })
624 
625 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
626 ({ __typeof (RTX) const _symbol = (RTX); \
627  const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
628  if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
629  rtl_check_failed_block_symbol (__FILE__, __LINE__, \
630  __FUNCTION__); \
631  &_symbol->u.block_sym; })
632 
633 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
634  const char *)
635  ATTRIBUTE_NORETURN;
636 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
637  const char *)
638  ATTRIBUTE_NORETURN;
639 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
640  int, const char *)
641  ATTRIBUTE_NORETURN;
642 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
643  int, const char *)
644  ATTRIBUTE_NORETURN;
645 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
646  const char *, int, const char *)
647  ATTRIBUTE_NORETURN;
648 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
649  bool, const char *, int, const char *)
650  ATTRIBUTE_NORETURN;
651 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
652  ATTRIBUTE_NORETURN;
653 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
654  const char *)
655  ATTRIBUTE_NORETURN;
656 
657 #else /* not ENABLE_RTL_CHECKING */
658 
659 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
660 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
661 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
662 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
663 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
664 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
665 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
666 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
667 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
668 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
669 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
670 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
671 
672 #endif
673 
674 /* General accessor macros for accessing the flags of an rtx. */
675 
676 /* Access an individual rtx flag, with no checking of any kind. */
677 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
678 
679 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
680 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
681 ({ __typeof (RTX) const _rtx = (RTX); \
682  if (GET_CODE(_rtx) != C1) \
683  rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
684  __FUNCTION__); \
685  _rtx; })
686 
687 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
688 ({ __typeof (RTX) const _rtx = (RTX); \
689  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
690  rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
691  __FUNCTION__); \
692  _rtx; })
693 
694 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
695 ({ __typeof (RTX) const _rtx = (RTX); \
696  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
697  && GET_CODE(_rtx) != C3) \
698  rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
699  __FUNCTION__); \
700  _rtx; })
701 
702 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
703 ({ __typeof (RTX) const _rtx = (RTX); \
704  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
705  && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
706  rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
707  __FUNCTION__); \
708  _rtx; })
709 
710 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
711 ({ __typeof (RTX) const _rtx = (RTX); \
712  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
713  && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
714  && GET_CODE(_rtx) != C5) \
715  rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
716  __FUNCTION__); \
717  _rtx; })
718 
719 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
720  __extension__ \
721 ({ __typeof (RTX) const _rtx = (RTX); \
722  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
723  && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
724  && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
725  rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
726  __FUNCTION__); \
727  _rtx; })
728 
729 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
730  __extension__ \
731 ({ __typeof (RTX) const _rtx = (RTX); \
732  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
733  && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
734  && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
735  && GET_CODE(_rtx) != C7) \
736  rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
737  __FUNCTION__); \
738  _rtx; })
739 
740 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
741  __extension__ \
742 ({ __typeof (RTX) const _rtx = (RTX); \
743  if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
744  && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
745  && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
746  && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
747  rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
748  __FUNCTION__); \
749  _rtx; })
750 
751 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
752  int, const char *)
753  ATTRIBUTE_NORETURN
754  ;
755 
756 #else /* not ENABLE_RTL_FLAG_CHECKING */
757 
758 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
759 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
760 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
761 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
762 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
763 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
764 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
765 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
766 #endif
767 
768 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
769 #define XUINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_uint)
770 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
771 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
772 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
773 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
774 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
775 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
776 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
777 #define XCFI(RTX, N) (RTL_CHECK1 (RTX, N, 'C').rt_cfi)
778 
779 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
780 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
781 
782 /* These are like XINT, etc. except that they expect a '0' field instead
783  of the normal type code. */
784 
785 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
786 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
787 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
788 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
789 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
790 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
791 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
792 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
793 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
794 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
795 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
796 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
797 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
798 
799 /* Access a '0' field with any type. */
800 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
801 
802 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
803 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
804 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
805 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
806 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
807 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
808 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
809 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
810 #define XCCFI(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cfi)
811 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
812 
813 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
814 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
815 
816 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
817 
818 /* ACCESS MACROS for particular fields of insns. */
819 
820 /* Holds a unique number for each insn.
821  These are not necessarily sequentially increasing. */
822 #define INSN_UID(INSN) XINT (INSN, 0)
823 
824 /* Chain insns together in sequence. */
825 #define PREV_INSN(INSN) XEXP (INSN, 1)
826 #define NEXT_INSN(INSN) XEXP (INSN, 2)
827 
828 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
829 
830 /* The body of an insn. */
831 #define PATTERN(INSN) XEXP (INSN, 4)
832 
833 #define INSN_LOCATION(INSN) XUINT (INSN, 5)
834 
835 #define INSN_HAS_LOCATION(INSN) ((LOCATION_LOCUS (INSN_LOCATION (INSN)))\
836  != UNKNOWN_LOCATION)
837 
838 /* LOCATION of an RTX if relevant. */
839 #define RTL_LOCATION(X) (INSN_P (X) ? \
840  INSN_LOCATION (X) : UNKNOWN_LOCATION)
841 
842 /* Code number of instruction, from when it was recognized.
843  -1 means this instruction has not been recognized yet. */
844 #define INSN_CODE(INSN) XINT (INSN, 6)
845 
846 #define RTX_FRAME_RELATED_P(RTX) \
847  (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
848  CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
849 
850 /* 1 if RTX is an insn that has been deleted. */
851 #define INSN_DELETED_P(RTX) \
852  (RTL_FLAG_CHECK8("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
853  CALL_INSN, JUMP_INSN, JUMP_TABLE_DATA, \
854  CODE_LABEL, BARRIER, NOTE)->volatil)
855 
856 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
857  TREE_READONLY. */
858 #define RTL_CONST_CALL_P(RTX) \
859  (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
860 
861 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
862  DECL_PURE_P. */
863 #define RTL_PURE_CALL_P(RTX) \
864  (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
865 
866 /* 1 if RTX is a call to a const or pure function. */
867 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
868  (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
869 
870 /* 1 if RTX is a call to a looping const or pure function. Built from
871  ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
872 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
873  (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
874 
875 /* 1 if RTX is a call_insn for a sibling call. */
876 #define SIBLING_CALL_P(RTX) \
877  (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
878 
879 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
880 #define INSN_ANNULLED_BRANCH_P(RTX) \
881  (RTL_FLAG_CHECK1("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN)->unchanging)
882 
883 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
884  If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
885  executed if the branch is taken. For annulled branches with this bit
886  clear, the insn should be executed only if the branch is not taken. */
887 #define INSN_FROM_TARGET_P(RTX) \
888  (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
889 
890 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
891  See the comments for ADDR_DIFF_VEC in rtl.def. */
892 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
893 
894 /* In a VALUE, the value cselib has assigned to RTX.
895  This is a "struct cselib_val_struct", see cselib.h. */
896 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
897 
898 /* Holds a list of notes on what this insn does to various REGs.
899  It is a chain of EXPR_LIST rtx's, where the second operand is the
900  chain pointer and the first operand is the REG being described.
901  The mode field of the EXPR_LIST contains not a real machine mode
902  but a value from enum reg_note. */
903 #define REG_NOTES(INSN) XEXP(INSN, 7)
904 
905 /* In an ENTRY_VALUE this is the DECL_INCOMING_RTL of the argument in
906  question. */
907 #define ENTRY_VALUE_EXP(RTX) (RTL_CHECKC1 (RTX, 0, ENTRY_VALUE).rt_rtx)
908 
909 enum reg_note
910 {
911 #define DEF_REG_NOTE(NAME) NAME,
912 #include "reg-notes.def"
913 #undef DEF_REG_NOTE
914  REG_NOTE_MAX
915 };
916 
917 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
918 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
919 #define PUT_REG_NOTE_KIND(LINK, KIND) \
920  PUT_MODE (LINK, (enum machine_mode) (KIND))
921 
922 /* Names for REG_NOTE's in EXPR_LIST insn's. */
923 
924 extern const char * const reg_note_name[];
925 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
926 
927 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
928  USE and CLOBBER expressions.
929  USE expressions list the registers filled with arguments that
930  are passed to the function.
931  CLOBBER expressions document the registers explicitly clobbered
932  by this CALL_INSN.
933  Pseudo registers can not be mentioned in this list. */
934 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
935 
936 /* The label-number of a code-label. The assembler label
937  is made from `L' and the label-number printed in decimal.
938  Label numbers are unique in a compilation. */
939 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
940 
941 /* In a NOTE that is a line number, this is a string for the file name that the
942  line is in. We use the same field to record block numbers temporarily in
943  NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
944  between ints and pointers if we use a different macro for the block number.)
945  */
946 
947 /* Opaque data. */
948 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
949 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
950 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
951 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
952 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
953 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
954 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
955 #define NOTE_CFI(INSN) XCCFI (INSN, 4, NOTE)
956 #define NOTE_LABEL_NUMBER(INSN) XCINT (INSN, 4, NOTE)
957 
958 /* In a NOTE that is a line number, this is the line number.
959  Other kinds of NOTEs are identified by negative numbers here. */
960 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
961 
962 /* Nonzero if INSN is a note marking the beginning of a basic block. */
963 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
964  (NOTE_P (INSN) && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
965 
966 /* Variable declaration and the location of a variable. */
967 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
968 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
969 
970 /* Initialization status of the variable in the location. Status
971  can be unknown, uninitialized or initialized. See enumeration
972  type below. */
973 #define PAT_VAR_LOCATION_STATUS(PAT) \
974  ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
975 
976 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
977 #define NOTE_VAR_LOCATION_DECL(NOTE) \
978  PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
979 #define NOTE_VAR_LOCATION_LOC(NOTE) \
980  PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
981 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
982  PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
983 
984 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
985 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
986 
987 /* Accessors for a tree-expanded var location debug insn. */
988 #define INSN_VAR_LOCATION_DECL(INSN) \
989  PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
990 #define INSN_VAR_LOCATION_LOC(INSN) \
991  PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
992 #define INSN_VAR_LOCATION_STATUS(INSN) \
993  PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
994 
995 /* Expand to the RTL that denotes an unknown variable location in a
996  DEBUG_INSN. */
997 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
998 
999 /* Determine whether X is such an unknown location. */
1000 #define VAR_LOC_UNKNOWN_P(X) \
1001  (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
1002 
1003 /* 1 if RTX is emitted after a call, but it should take effect before
1004  the call returns. */
1005 #define NOTE_DURING_CALL_P(RTX) \
1006  (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
1007 
1008 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
1009 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
1010 
1011 /* VAR_DECL/PARM_DECL DEBUG_IMPLICIT_PTR takes address of. */
1012 #define DEBUG_IMPLICIT_PTR_DECL(RTX) XCTREE (RTX, 0, DEBUG_IMPLICIT_PTR)
1013 
1014 /* PARM_DECL DEBUG_PARAMETER_REF references. */
1015 #define DEBUG_PARAMETER_REF_DECL(RTX) XCTREE (RTX, 0, DEBUG_PARAMETER_REF)
1016 
1017 /* Codes that appear in the NOTE_KIND field for kinds of notes
1018  that are not line numbers. These codes are all negative.
1019 
1020  Notice that we do not try to use zero here for any of
1021  the special note codes because sometimes the source line
1022  actually can be zero! This happens (for example) when we
1023  are generating code for the per-translation-unit constructor
1024  and destructor routines for some C++ translation unit. */
1025 
1026 enum insn_note
1027 {
1028 #define DEF_INSN_NOTE(NAME) NAME,
1029 #include "insn-notes.def"
1030 #undef DEF_INSN_NOTE
1031 
1032  NOTE_INSN_MAX
1033 };
1034 
1035 /* Names for NOTE insn's other than line numbers. */
1036 
1037 extern const char * const note_insn_name[NOTE_INSN_MAX];
1038 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1039  (note_insn_name[(NOTE_CODE)])
1040 
1041 /* The name of a label, in case it corresponds to an explicit label
1042  in the input source code. */
1043 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1044 
1045 /* In jump.c, each label contains a count of the number
1046  of LABEL_REFs that point at it, so unused labels can be deleted. */
1047 #define LABEL_NUSES(RTX) XCINT (RTX, 5, CODE_LABEL)
1048 
1049 /* Labels carry a two-bit field composed of the ->jump and ->call
1050  bits. This field indicates whether the label is an alternate
1051  entry point, and if so, what kind. */
1052 enum label_kind
1053 {
1054  LABEL_NORMAL = 0, /* ordinary label */
1055  LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1056  LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1057  LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1058 };
1059 
1060 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1061 
1062 /* Retrieve the kind of LABEL. */
1063 #define LABEL_KIND(LABEL) __extension__ \
1064 ({ __typeof (LABEL) const _label = (LABEL); \
1065  if (! LABEL_P (_label)) \
1066  rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1067  __FUNCTION__); \
1068  (enum label_kind) ((_label->jump << 1) | _label->call); })
1069 
1070 /* Set the kind of LABEL. */
1071 #define SET_LABEL_KIND(LABEL, KIND) do { \
1072  __typeof (LABEL) const _label = (LABEL); \
1073  const unsigned int _kind = (KIND); \
1074  if (! LABEL_P (_label)) \
1075  rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1076  __FUNCTION__); \
1077  _label->jump = ((_kind >> 1) & 1); \
1078  _label->call = (_kind & 1); \
1079 } while (0)
1080 
1081 #else
1082 
1083 /* Retrieve the kind of LABEL. */
1084 #define LABEL_KIND(LABEL) \
1085  ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1086 
1087 /* Set the kind of LABEL. */
1088 #define SET_LABEL_KIND(LABEL, KIND) do { \
1089  rtx const _label = (LABEL); \
1090  const unsigned int _kind = (KIND); \
1091  _label->jump = ((_kind >> 1) & 1); \
1092  _label->call = (_kind & 1); \
1093 } while (0)
1094 
1095 #endif /* rtl flag checking */
1096 
1097 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1098 
1099 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1100  so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1101  be decremented and possibly the label can be deleted. */
1102 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1103 
1104 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1105  goes through all the LABEL_REFs that jump to that label. The chain
1106  eventually winds up at the CODE_LABEL: it is circular. */
1107 #define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
1108 
1109 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1110  be used on RHS. Use SET_REGNO to change the value. */
1111 #define REGNO(RTX) (rhs_regno(RTX))
1112 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1113 #define SET_REGNO_RAW(RTX,N) (XCUINT (RTX, 0, REG) = N)
1114 
1115 /* ORIGINAL_REGNO holds the number the register originally had; for a
1116  pseudo register turned into a hard reg this will hold the old pseudo
1117  register number. */
1118 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1119 
1120 /* Force the REGNO macro to only be used on the lhs. */
1121 static inline unsigned int
1122 rhs_regno (const_rtx x)
1123 {
1124  return XCUINT (x, 0, REG);
1125 }
1126 
1127 
1128 /* 1 if RTX is a reg or parallel that is the current function's return
1129  value. */
1130 #define REG_FUNCTION_VALUE_P(RTX) \
1131  (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1132 
1133 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1134 #define REG_USERVAR_P(RTX) \
1135  (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1136 
1137 /* 1 if RTX is a reg that holds a pointer value. */
1138 #define REG_POINTER(RTX) \
1139  (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1140 
1141 /* 1 if RTX is a mem that holds a pointer value. */
1142 #define MEM_POINTER(RTX) \
1143  (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1144 
1145 /* 1 if the given register REG corresponds to a hard register. */
1146 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1147 
1148 /* 1 if the given register number REG_NO corresponds to a hard register. */
1149 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1150 
1151 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1152 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1153 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1154 
1155 /* For a CONST_DOUBLE:
1156  For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1157  low-order word and ..._HIGH the high-order.
1158  For a float, there is a REAL_VALUE_TYPE structure, and
1159  CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1160 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1161 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1162 #define CONST_DOUBLE_REAL_VALUE(r) \
1163  ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1164 
1165 #define CONST_FIXED_VALUE(r) \
1166  ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1167 #define CONST_FIXED_VALUE_HIGH(r) \
1168  ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1169 #define CONST_FIXED_VALUE_LOW(r) \
1170  ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1171 
1172 /* For a CONST_VECTOR, return element #n. */
1173 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1174 
1175 /* For a CONST_VECTOR, return the number of elements in a vector. */
1176 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1177 
1178 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1179  SUBREG_BYTE extracts the byte-number. */
1180 
1181 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1182 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1183 
1184 /* in rtlanal.c */
1185 /* Return the right cost to give to an operation
1186  to make the cost of the corresponding register-to-register instruction
1187  N times that of a fast register-to-register instruction. */
1188 #define COSTS_N_INSNS(N) ((N) * 4)
1189 
1190 /* Maximum cost of an rtl expression. This value has the special meaning
1191  not to use an rtx with this cost under any circumstances. */
1192 #define MAX_COST INT_MAX
1193 
1194 /* A structure to hold all available cost information about an rtl
1195  expression. */
1196 struct full_rtx_costs
1197 {
1198  int speed;
1199  int size;
1200 };
1201 
1202 /* Initialize a full_rtx_costs structure C to the maximum cost. */
1203 static inline void
1204 init_costs_to_max (struct full_rtx_costs *c)
1205 {
1206  c->speed = MAX_COST;
1207  c->size = MAX_COST;
1208 }
1209 
1210 /* Initialize a full_rtx_costs structure C to zero cost. */
1211 static inline void
1212 init_costs_to_zero (struct full_rtx_costs *c)
1213 {
1214  c->speed = 0;
1215  c->size = 0;
1216 }
1217 
1218 /* Compare two full_rtx_costs structures A and B, returning true
1219  if A < B when optimizing for speed. */
1220 static inline bool
1221 costs_lt_p (struct full_rtx_costs *a, struct full_rtx_costs *b,
1222  bool speed)
1223 {
1224  if (speed)
1225  return (a->speed < b->speed
1226  || (a->speed == b->speed && a->size < b->size));
1227  else
1228  return (a->size < b->size
1229  || (a->size == b->size && a->speed < b->speed));
1230 }
1231 
1232 /* Increase both members of the full_rtx_costs structure C by the
1233  cost of N insns. */
1234 static inline void
1235 costs_add_n_insns (struct full_rtx_costs *c, int n)
1236 {
1237  c->speed += COSTS_N_INSNS (n);
1238  c->size += COSTS_N_INSNS (n);
1239 }
1240 
1241 /* Information about an address. This structure is supposed to be able
1242  to represent all supported target addresses. Please extend it if it
1243  is not yet general enough. */
1244 struct address_info {
1245  /* The mode of the value being addressed, or VOIDmode if this is
1246  a load-address operation with no known address mode. */
1247  enum machine_mode mode;
1248 
1249  /* The address space. */
1250  addr_space_t as;
1251 
1252  /* A pointer to the top-level address. */
1253  rtx *outer;
1254 
1255  /* A pointer to the inner address, after all address mutations
1256  have been stripped from the top-level address. It can be one
1257  of the following:
1258 
1259  - A {PRE,POST}_{INC,DEC} of *BASE. SEGMENT, INDEX and DISP are null.
1260 
1261  - A {PRE,POST}_MODIFY of *BASE. In this case either INDEX or DISP
1262  points to the step value, depending on whether the step is variable
1263  or constant respectively. SEGMENT is null.
1264 
1265  - A plain sum of the form SEGMENT + BASE + INDEX + DISP,
1266  with null fields evaluating to 0. */
1267  rtx *inner;
1268 
1269  /* Components that make up *INNER. Each one may be null or nonnull.
1270  When nonnull, their meanings are as follows:
1271 
1272  - *SEGMENT is the "segment" of memory to which the address refers.
1273  This value is entirely target-specific and is only called a "segment"
1274  because that's its most typical use. It contains exactly one UNSPEC,
1275  pointed to by SEGMENT_TERM. The contents of *SEGMENT do not need
1276  reloading.
1277 
1278  - *BASE is a variable expression representing a base address.
1279  It contains exactly one REG, SUBREG or MEM, pointed to by BASE_TERM.
1280 
1281  - *INDEX is a variable expression representing an index value.
1282  It may be a scaled expression, such as a MULT. It has exactly
1283  one REG, SUBREG or MEM, pointed to by INDEX_TERM.
1284 
1285  - *DISP is a constant, possibly mutated. DISP_TERM points to the
1286  unmutated RTX_CONST_OBJ. */
1287  rtx *segment;
1288  rtx *base;
1289  rtx *index;
1290  rtx *disp;
1291 
1292  rtx *segment_term;
1293  rtx *base_term;
1294  rtx *index_term;
1295  rtx *disp_term;
1296 
1297  /* In a {PRE,POST}_MODIFY address, this points to a second copy
1298  of BASE_TERM, otherwise it is null. */
1299  rtx *base_term2;
1300 
1301  /* ADDRESS if this structure describes an address operand, MEM if
1302  it describes a MEM address. */
1303  enum rtx_code addr_outer_code;
1304 
1305  /* If BASE is nonnull, this is the code of the rtx that contains it. */
1306  enum rtx_code base_outer_code;
1307 
1308  /* True if this is an RTX_AUTOINC address. */
1309  bool autoinc_p;
1310 };
1311 
1312 extern void init_rtlanal (void);
1313 extern int rtx_cost (rtx, enum rtx_code, int, bool);
1314 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1315 extern void get_full_rtx_cost (rtx, enum rtx_code, int,
1316  struct full_rtx_costs *);
1317 extern unsigned int subreg_lsb (const_rtx);
1318 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1319  unsigned int);
1320 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1321  unsigned int, enum machine_mode);
1322 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1323  unsigned int, enum machine_mode);
1324 extern unsigned int subreg_regno (const_rtx);
1325 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1326  unsigned int, enum machine_mode);
1327 extern unsigned int subreg_nregs (const_rtx);
1328 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1329 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1330 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1331 extern bool constant_pool_constant_p (rtx);
1332 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1333 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1334 extern void split_double (rtx, rtx *, rtx *);
1335 extern rtx *strip_address_mutations (rtx *, enum rtx_code * = 0);
1336 extern void decompose_address (struct address_info *, rtx *,
1337  enum machine_mode, addr_space_t, enum rtx_code);
1338 extern void decompose_lea_address (struct address_info *, rtx *);
1339 extern void decompose_mem_address (struct address_info *, rtx);
1340 extern void update_address (struct address_info *);
1341 extern HOST_WIDE_INT get_index_scale (const struct address_info *);
1342 extern enum rtx_code get_index_code (const struct address_info *);
1343 
1344 #ifndef GENERATOR_FILE
1345 /* Return the cost of SET X. SPEED_P is true if optimizing for speed
1346  rather than size. */
1347 
1348 static inline int
1349 set_rtx_cost (rtx x, bool speed_p)
1350 {
1351  return rtx_cost (x, INSN, 4, speed_p);
1352 }
1353 
1354 /* Like set_rtx_cost, but return both the speed and size costs in C. */
1355 
1356 static inline void
1357 get_full_set_rtx_cost (rtx x, struct full_rtx_costs *c)
1358 {
1359  get_full_rtx_cost (x, INSN, 4, c);
1360 }
1361 
1362 /* Return the cost of moving X into a register, relative to the cost
1363  of a register move. SPEED_P is true if optimizing for speed rather
1364  than size. */
1365 
1366 static inline int
1367 set_src_cost (rtx x, bool speed_p)
1368 {
1369  return rtx_cost (x, SET, 1, speed_p);
1370 }
1371 
1372 /* Like set_src_cost, but return both the speed and size costs in C. */
1373 
1374 static inline void
1375 get_full_set_src_cost (rtx x, struct full_rtx_costs *c)
1376 {
1377  get_full_rtx_cost (x, SET, 1, c);
1378 }
1379 #endif
1380 
1381 /* 1 if RTX is a subreg containing a reg that is already known to be
1382  sign- or zero-extended from the mode of the subreg to the mode of
1383  the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1384  extension.
1385 
1386  When used as a LHS, is means that this extension must be done
1387  when assigning to SUBREG_REG. */
1388 
1389 #define SUBREG_PROMOTED_VAR_P(RTX) \
1390  (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1391 
1392 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1393 do { \
1394  rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1395  if ((VAL) < 0) \
1396  _rtx->volatil = 1; \
1397  else { \
1398  _rtx->volatil = 0; \
1399  _rtx->unchanging = (VAL); \
1400  } \
1401 } while (0)
1402 
1403 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1404  this gives the necessary extensions:
1405  0 - signed
1406  1 - normal unsigned
1407  -1 - pointer unsigned, which most often can be handled like unsigned
1408  extension, except for generating instructions where we need to
1409  emit special code (ptr_extend insns) on some architectures. */
1410 
1411 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1412  ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1413  ? -1 : (int) (RTX)->unchanging)
1414 
1415 /* True if the subreg was generated by LRA for reload insns. Such
1416  subregs are valid only during LRA. */
1417 #define LRA_SUBREG_P(RTX) \
1418  (RTL_FLAG_CHECK1("LRA_SUBREG_P", (RTX), SUBREG)->jump)
1419 
1420 /* Access various components of an ASM_OPERANDS rtx. */
1421 
1422 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1423 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1424 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1425 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1426 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1427 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1428 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1429 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1430  XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1431 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1432  XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1433 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1434  GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1435 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1436 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1437 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1438 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1439 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1440 
1441 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1442 #define MEM_READONLY_P(RTX) \
1443  (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1444 
1445 /* 1 if RTX is a mem and we should keep the alias set for this mem
1446  unchanged when we access a component. Set to 1, or example, when we
1447  are already in a non-addressable component of an aggregate. */
1448 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1449  (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1450 
1451 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1452 #define MEM_VOLATILE_P(RTX) \
1453  (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1454  ASM_INPUT)->volatil)
1455 
1456 /* 1 if RTX is a mem that cannot trap. */
1457 #define MEM_NOTRAP_P(RTX) \
1458  (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1459 
1460 /* The memory attribute block. We provide access macros for each value
1461  in the block and provide defaults if none specified. */
1462 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1463 
1464 /* The register attribute block. We provide access macros for each value
1465  in the block and provide defaults if none specified. */
1466 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1467 
1468 #ifndef GENERATOR_FILE
1469 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1470  set, and may alias anything. Otherwise, the MEM can only alias
1471  MEMs in a conflicting alias set. This value is set in a
1472  language-dependent manner in the front-end, and should not be
1473  altered in the back-end. These set numbers are tested with
1474  alias_sets_conflict_p. */
1475 #define MEM_ALIAS_SET(RTX) (get_mem_attrs (RTX)->alias)
1476 
1477 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1478  refer to part of a DECL. It may also be a COMPONENT_REF. */
1479 #define MEM_EXPR(RTX) (get_mem_attrs (RTX)->expr)
1480 
1481 /* For a MEM rtx, true if its MEM_OFFSET is known. */
1482 #define MEM_OFFSET_KNOWN_P(RTX) (get_mem_attrs (RTX)->offset_known_p)
1483 
1484 /* For a MEM rtx, the offset from the start of MEM_EXPR. */
1485 #define MEM_OFFSET(RTX) (get_mem_attrs (RTX)->offset)
1486 
1487 /* For a MEM rtx, the address space. */
1488 #define MEM_ADDR_SPACE(RTX) (get_mem_attrs (RTX)->addrspace)
1489 
1490 /* For a MEM rtx, true if its MEM_SIZE is known. */
1491 #define MEM_SIZE_KNOWN_P(RTX) (get_mem_attrs (RTX)->size_known_p)
1492 
1493 /* For a MEM rtx, the size in bytes of the MEM. */
1494 #define MEM_SIZE(RTX) (get_mem_attrs (RTX)->size)
1495 
1496 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1497  mode as a default when STRICT_ALIGNMENT, but not if not. */
1498 #define MEM_ALIGN(RTX) (get_mem_attrs (RTX)->align)
1499 #else
1500 #define MEM_ADDR_SPACE(RTX) ADDR_SPACE_GENERIC
1501 #endif
1502 
1503 /* For a REG rtx, the decl it is known to refer to, if it is known to
1504  refer to part of a DECL. */
1505 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1506 
1507 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1508  HOST_WIDE_INT. */
1509 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1510 
1511 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1512 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1513  (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1514  MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1515  MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1516  MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1517  MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1518  MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1519 
1520 /* 1 if RTX is a label_ref for a nonlocal label. */
1521 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1522  REG_LABEL_TARGET note. */
1523 #define LABEL_REF_NONLOCAL_P(RTX) \
1524  (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1525 
1526 /* 1 if RTX is a code_label that should always be considered to be needed. */
1527 #define LABEL_PRESERVE_P(RTX) \
1528  (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1529 
1530 /* During sched, 1 if RTX is an insn that must be scheduled together
1531  with the preceding insn. */
1532 #define SCHED_GROUP_P(RTX) \
1533  (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1534  JUMP_INSN, CALL_INSN \
1535  )->in_struct)
1536 
1537 /* For a SET rtx, SET_DEST is the place that is set
1538  and SET_SRC is the value it is set to. */
1539 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1540 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1541 #define SET_IS_RETURN_P(RTX) \
1542  (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1543 
1544 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1545 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1546 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1547 
1548 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1549  conditionally executing the code on, COND_EXEC_CODE is the code
1550  to execute if the condition is true. */
1551 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1552 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1553 
1554 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1555  constants pool. */
1556 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1557  (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1558 
1559 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1560  tree constant pool. This information is private to varasm.c. */
1561 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1562  (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1563  (RTX), SYMBOL_REF)->frame_related)
1564 
1565 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1566 #define SYMBOL_REF_FLAG(RTX) \
1567  (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1568 
1569 /* 1 if RTX is a symbol_ref that has been the library function in
1570  emit_library_call. */
1571 #define SYMBOL_REF_USED(RTX) \
1572  (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1573 
1574 /* 1 if RTX is a symbol_ref for a weak symbol. */
1575 #define SYMBOL_REF_WEAK(RTX) \
1576  (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1577 
1578 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1579  SYMBOL_REF_CONSTANT. */
1580 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1581 
1582 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1583  pool symbol. */
1584 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1585  (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1586 
1587 /* The tree (decl or constant) associated with the symbol, or null. */
1588 #define SYMBOL_REF_DECL(RTX) \
1589  (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1590 
1591 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1592 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1593  (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1594 
1595 /* The rtx constant pool entry for a symbol, or null. */
1596 #define SYMBOL_REF_CONSTANT(RTX) \
1597  (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1598 
1599 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1600  information derivable from the tree decl associated with this symbol.
1601  Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1602  decl. In some cases this is a bug. But beyond that, it's nice to cache
1603  this information to avoid recomputing it. Finally, this allows space for
1604  the target to store more than one bit of information, as with
1605  SYMBOL_REF_FLAG. */
1606 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1607 
1608 /* These flags are common enough to be defined for all targets. They
1609  are computed by the default version of targetm.encode_section_info. */
1610 
1611 /* Set if this symbol is a function. */
1612 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1613 #define SYMBOL_REF_FUNCTION_P(RTX) \
1614  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1615 /* Set if targetm.binds_local_p is true. */
1616 #define SYMBOL_FLAG_LOCAL (1 << 1)
1617 #define SYMBOL_REF_LOCAL_P(RTX) \
1618  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1619 /* Set if targetm.in_small_data_p is true. */
1620 #define SYMBOL_FLAG_SMALL (1 << 2)
1621 #define SYMBOL_REF_SMALL_P(RTX) \
1622  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1623 /* The three-bit field at [5:3] is true for TLS variables; use
1624  SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1625 #define SYMBOL_FLAG_TLS_SHIFT 3
1626 #define SYMBOL_REF_TLS_MODEL(RTX) \
1627  ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1628 /* Set if this symbol is not defined in this translation unit. */
1629 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1630 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1631  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1632 /* Set if this symbol has a block_symbol structure associated with it. */
1633 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1634 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1635  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1636 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1637  SYMBOL_REF_HAS_BLOCK_INFO_P. */
1638 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1639 #define SYMBOL_REF_ANCHOR_P(RTX) \
1640  ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1641 
1642 /* Subsequent bits are available for the target to use. */
1643 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1644 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1645 
1646 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1647  structure to which the symbol belongs, or NULL if it has not been
1648  assigned a block. */
1649 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1650 
1651 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1652  the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1653  RTX has not yet been assigned to a block, or it has not been given an
1654  offset within that block. */
1655 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1656 
1657 /* True if RTX is flagged to be a scheduling barrier. */
1658 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1659  (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1660 
1661 /* Indicate whether the machine has any sort of auto increment addressing.
1662  If not, we can avoid checking for REG_INC notes. */
1663 
1664 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1665  || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1666  || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_POST_MODIFY_DISP) \
1667  || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1668 #define AUTO_INC_DEC
1669 #endif
1670 
1671 /* Define a macro to look for REG_INC notes,
1672  but save time on machines where they never exist. */
1673 
1674 #ifdef AUTO_INC_DEC
1675 #define FIND_REG_INC_NOTE(INSN, REG) \
1676  ((REG) != NULL_RTX && REG_P ((REG)) \
1677  ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1678  : find_reg_note ((INSN), REG_INC, (REG)))
1679 #else
1680 #define FIND_REG_INC_NOTE(INSN, REG) 0
1681 #endif
1682 
1683 #ifndef HAVE_PRE_INCREMENT
1684 #define HAVE_PRE_INCREMENT 0
1685 #endif
1686 
1687 #ifndef HAVE_PRE_DECREMENT
1688 #define HAVE_PRE_DECREMENT 0
1689 #endif
1690 
1691 #ifndef HAVE_POST_INCREMENT
1692 #define HAVE_POST_INCREMENT 0
1693 #endif
1694 
1695 #ifndef HAVE_POST_DECREMENT
1696 #define HAVE_POST_DECREMENT 0
1697 #endif
1698 
1699 #ifndef HAVE_POST_MODIFY_DISP
1700 #define HAVE_POST_MODIFY_DISP 0
1701 #endif
1702 
1703 #ifndef HAVE_POST_MODIFY_REG
1704 #define HAVE_POST_MODIFY_REG 0
1705 #endif
1706 
1707 #ifndef HAVE_PRE_MODIFY_DISP
1708 #define HAVE_PRE_MODIFY_DISP 0
1709 #endif
1710 
1711 #ifndef HAVE_PRE_MODIFY_REG
1712 #define HAVE_PRE_MODIFY_REG 0
1713 #endif
1714 
1715 
1716 /* Some architectures do not have complete pre/post increment/decrement
1717  instruction sets, or only move some modes efficiently. These macros
1718  allow us to tune autoincrement generation. */
1719 
1720 #ifndef USE_LOAD_POST_INCREMENT
1721 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1722 #endif
1723 
1724 #ifndef USE_LOAD_POST_DECREMENT
1725 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1726 #endif
1727 
1728 #ifndef USE_LOAD_PRE_INCREMENT
1729 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1730 #endif
1731 
1732 #ifndef USE_LOAD_PRE_DECREMENT
1733 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1734 #endif
1735 
1736 #ifndef USE_STORE_POST_INCREMENT
1737 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1738 #endif
1739 
1740 #ifndef USE_STORE_POST_DECREMENT
1741 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1742 #endif
1743 
1744 #ifndef USE_STORE_PRE_INCREMENT
1745 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1746 #endif
1747 
1748 #ifndef USE_STORE_PRE_DECREMENT
1749 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1750 #endif
1751 
1752 /* Nonzero when we are generating CONCATs. */
1753 extern int generating_concat_p;
1754 
1755 /* Nonzero when we are expanding trees to RTL. */
1756 extern int currently_expanding_to_rtl;
1757 
1758 /* Generally useful functions. */
1759 
1760 /* In explow.c */
1761 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1762 extern rtx plus_constant (enum machine_mode, rtx, HOST_WIDE_INT);
1763 
1764 /* In rtl.c */
1765 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1766 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1767 
1768 extern rtvec rtvec_alloc (int);
1769 extern rtvec shallow_copy_rtvec (rtvec);
1770 extern bool shared_const_p (const_rtx);
1771 extern rtx copy_rtx (rtx);
1772 extern void dump_rtx_statistics (void);
1773 
1774 /* In emit-rtl.c */
1775 extern rtx copy_rtx_if_shared (rtx);
1776 
1777 /* In rtl.c */
1778 extern unsigned int rtx_size (const_rtx);
1779 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1780 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1781 extern int rtx_equal_p (const_rtx, const_rtx);
1782 extern hashval_t iterative_hash_rtx (const_rtx, hashval_t);
1783 
1784 /* In emit-rtl.c */
1785 extern rtvec gen_rtvec_v (int, rtx *);
1786 extern rtx gen_reg_rtx (enum machine_mode);
1787 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1788 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1789 extern rtx gen_reg_rtx_and_attrs (rtx);
1790 extern rtx gen_label_rtx (void);
1791 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1792 
1793 /* In cse.c */
1794 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1795 
1796 /* In emit-rtl.c */
1797 extern rtx gen_highpart (enum machine_mode, rtx);
1798 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1799 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1800 
1801 /* In emit-rtl.c */
1802 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1803 extern bool paradoxical_subreg_p (const_rtx);
1804 extern int subreg_lowpart_p (const_rtx);
1805 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1806  enum machine_mode);
1807 extern unsigned int subreg_highpart_offset (enum machine_mode,
1808  enum machine_mode);
1809 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1810 extern rtx make_safe_from (rtx, rtx);
1811 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1812  addr_space_t);
1813 #define convert_memory_address(to_mode,x) \
1814  convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1815 extern const char *get_insn_name (int);
1816 extern rtx get_last_insn_anywhere (void);
1817 extern rtx get_first_nonnote_insn (void);
1818 extern rtx get_last_nonnote_insn (void);
1819 extern void start_sequence (void);
1820 extern void push_to_sequence (rtx);
1821 extern void push_to_sequence2 (rtx, rtx);
1822 extern void end_sequence (void);
1823 extern double_int rtx_to_double_int (const_rtx);
1824 extern rtx immed_double_int_const (double_int, enum machine_mode);
1825 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1826  enum machine_mode);
1827 
1828 /* In loop-iv.c */
1829 
1830 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1831 
1832 /* In varasm.c */
1833 extern rtx force_const_mem (enum machine_mode, rtx);
1834 
1835 /* In varasm.c */
1836 
1837 struct function;
1838 extern rtx get_pool_constant (rtx);
1839 extern rtx get_pool_constant_mark (rtx, bool *);
1840 extern enum machine_mode get_pool_mode (const_rtx);
1841 extern rtx simplify_subtraction (rtx);
1842 extern void decide_function_section (tree);
1843 
1844 /* In function.c */
1845 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1846 #define ASLK_REDUCE_ALIGN 1
1847 #define ASLK_RECORD_PAD 2
1848 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, int);
1849 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT);
1850 extern rtx assign_stack_temp_for_type (enum machine_mode, HOST_WIDE_INT, tree);
1851 extern rtx assign_temp (tree, int, int);
1852 
1853 /* In emit-rtl.c */
1854 extern rtx emit_insn_before (rtx, rtx);
1855 extern rtx emit_insn_before_noloc (rtx, rtx, basic_block);
1856 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1857 extern rtx emit_jump_insn_before (rtx, rtx);
1858 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1859 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1860 extern rtx emit_call_insn_before (rtx, rtx);
1861 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1862 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1863 extern rtx emit_debug_insn_before (rtx, rtx);
1864 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1865 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1866 extern rtx emit_barrier_before (rtx);
1867 extern rtx emit_label_before (rtx, rtx);
1868 extern rtx emit_note_before (enum insn_note, rtx);
1869 extern rtx emit_insn_after (rtx, rtx);
1870 extern rtx emit_insn_after_noloc (rtx, rtx, basic_block);
1871 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1872 extern rtx emit_jump_insn_after (rtx, rtx);
1873 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1874 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1875 extern rtx emit_call_insn_after (rtx, rtx);
1876 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1877 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1878 extern rtx emit_debug_insn_after (rtx, rtx);
1879 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1880 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1881 extern rtx emit_barrier_after (rtx);
1882 extern rtx emit_label_after (rtx, rtx);
1883 extern rtx emit_note_after (enum insn_note, rtx);
1884 extern rtx emit_insn (rtx);
1885 extern rtx emit_debug_insn (rtx);
1886 extern rtx emit_jump_insn (rtx);
1887 extern rtx emit_call_insn (rtx);
1888 extern rtx emit_label (rtx);
1889 extern rtx emit_jump_table_data (rtx);
1890 extern rtx emit_barrier (void);
1891 extern rtx emit_note (enum insn_note);
1892 extern rtx emit_note_copy (rtx);
1893 extern rtx gen_clobber (rtx);
1894 extern rtx emit_clobber (rtx);
1895 extern rtx gen_use (rtx);
1896 extern rtx emit_use (rtx);
1897 extern rtx make_insn_raw (rtx);
1898 extern void add_function_usage_to (rtx, rtx);
1899 extern rtx last_call_insn (void);
1900 extern rtx previous_insn (rtx);
1901 extern rtx next_insn (rtx);
1902 extern rtx prev_nonnote_insn (rtx);
1903 extern rtx prev_nonnote_insn_bb (rtx);
1904 extern rtx next_nonnote_insn (rtx);
1905 extern rtx next_nonnote_insn_bb (rtx);
1906 extern rtx prev_nondebug_insn (rtx);
1907 extern rtx next_nondebug_insn (rtx);
1908 extern rtx prev_nonnote_nondebug_insn (rtx);
1909 extern rtx next_nonnote_nondebug_insn (rtx);
1910 extern rtx prev_real_insn (rtx);
1911 extern rtx next_real_insn (rtx);
1912 extern rtx prev_active_insn (rtx);
1913 extern rtx next_active_insn (rtx);
1914 extern int active_insn_p (const_rtx);
1915 extern rtx next_cc0_user (rtx);
1916 extern rtx prev_cc0_setter (rtx);
1917 
1918 /* In emit-rtl.c */
1919 extern int insn_line (const_rtx);
1920 extern const char * insn_file (const_rtx);
1921 extern tree insn_scope (const_rtx);
1922 extern location_t prologue_location, epilogue_location;
1923 
1924 /* In jump.c */
1925 extern enum rtx_code reverse_condition (enum rtx_code);
1926 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1927 extern enum rtx_code swap_condition (enum rtx_code);
1928 extern enum rtx_code unsigned_condition (enum rtx_code);
1929 extern enum rtx_code signed_condition (enum rtx_code);
1930 extern void mark_jump_label (rtx, rtx, int);
1931 
1932 /* In jump.c */
1933 extern rtx delete_related_insns (rtx);
1934 
1935 /* In recog.c */
1936 extern rtx *find_constant_term_loc (rtx *);
1937 
1938 /* In emit-rtl.c */
1939 extern rtx try_split (rtx, rtx, int);
1940 extern int split_branch_probability;
1941 
1942 /* In unknown file */
1943 extern rtx split_insns (rtx, rtx);
1944 
1945 /* In simplify-rtx.c */
1946 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1947  rtx, enum machine_mode);
1948 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1949  enum machine_mode);
1950 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1951  rtx, rtx);
1952 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1953  rtx);
1954 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1955  enum machine_mode, rtx, rtx, rtx);
1956 extern rtx simplify_const_relational_operation (enum rtx_code,
1957  enum machine_mode, rtx, rtx);
1958 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1959  enum machine_mode, rtx, rtx);
1960 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1961 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1962  enum machine_mode);
1963 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1964  enum machine_mode, rtx, rtx, rtx);
1965 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1966  enum machine_mode, rtx, rtx);
1967 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1968  unsigned int);
1969 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1970  unsigned int);
1971 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1972  rtx (*fn) (rtx, const_rtx, void *), void *);
1973 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1974 extern rtx simplify_rtx (const_rtx);
1975 extern rtx avoid_constant_pool_reference (rtx);
1976 extern rtx delegitimize_mem_from_attrs (rtx);
1977 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1978 extern bool val_signbit_p (enum machine_mode, unsigned HOST_WIDE_INT);
1979 extern bool val_signbit_known_set_p (enum machine_mode,
1980  unsigned HOST_WIDE_INT);
1981 extern bool val_signbit_known_clear_p (enum machine_mode,
1982  unsigned HOST_WIDE_INT);
1983 
1984 /* In reginfo.c */
1985 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1986  bool);
1987 
1988 /* In emit-rtl.c */
1989 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1990 extern rtx set_dst_reg_note (rtx, enum reg_note, rtx, rtx);
1991 extern void set_insn_deleted (rtx);
1992 
1993 /* Functions in rtlanal.c */
1994 
1995 /* Single set is implemented as macro for performance reasons. */
1996 #define single_set(I) (INSN_P (I) \
1997  ? (GET_CODE (PATTERN (I)) == SET \
1998  ? PATTERN (I) : single_set_1 (I)) \
1999  : NULL_RTX)
2000 #define single_set_1(I) single_set_2 (I, PATTERN (I))
2001 
2002 /* Structure used for passing data to REPLACE_LABEL. */
2003 typedef struct replace_label_data
2004 {
2005  rtx r1;
2006  rtx r2;
2007  bool update_label_nuses;
2008 } replace_label_data;
2009 
2010 extern enum machine_mode get_address_mode (rtx mem);
2011 extern int rtx_addr_can_trap_p (const_rtx);
2012 extern bool nonzero_address_p (const_rtx);
2013 extern int rtx_unstable_p (const_rtx);
2014 extern bool rtx_varies_p (const_rtx, bool);
2015 extern bool rtx_addr_varies_p (const_rtx, bool);
2016 extern rtx get_call_rtx_from (rtx);
2017 extern HOST_WIDE_INT get_integer_term (const_rtx);
2018 extern rtx get_related_value (const_rtx);
2019 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
2020 extern void split_const (rtx, rtx *, rtx *);
2021 extern bool unsigned_reg_p (rtx);
2022 extern int reg_mentioned_p (const_rtx, const_rtx);
2023 extern int count_occurrences (const_rtx, const_rtx, int);
2024 extern int reg_referenced_p (const_rtx, const_rtx);
2025 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
2026 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
2027 extern int commutative_operand_precedence (rtx);
2028 extern bool swap_commutative_operands_p (rtx, rtx);
2029 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
2030 extern int no_labels_between_p (const_rtx, const_rtx);
2031 extern int modified_in_p (const_rtx, const_rtx);
2032 extern int reg_set_p (const_rtx, const_rtx);
2033 extern rtx single_set_2 (const_rtx, const_rtx);
2034 extern int multiple_sets (const_rtx);
2035 extern int set_noop_p (const_rtx);
2036 extern int noop_move_p (const_rtx);
2037 extern rtx find_last_value (rtx, rtx *, rtx, int);
2038 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
2039 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
2040 extern const_rtx set_of (const_rtx, const_rtx);
2041 extern void record_hard_reg_sets (rtx, const_rtx, void *);
2042 extern void record_hard_reg_uses (rtx *, void *);
2043 #ifdef HARD_CONST
2044 extern void find_all_hard_reg_sets (const_rtx, HARD_REG_SET *);
2045 #endif
2046 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
2047 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
2048 extern int dead_or_set_p (const_rtx, const_rtx);
2049 extern int dead_or_set_regno_p (const_rtx, unsigned int);
2050 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
2051 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
2052 extern rtx find_reg_equal_equiv_note (const_rtx);
2053 extern rtx find_constant_src (const_rtx);
2054 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
2055 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
2056 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
2057 extern void add_reg_note (rtx, enum reg_note, rtx);
2058 extern void remove_note (rtx, const_rtx);
2059 extern void remove_reg_equal_equiv_notes (rtx);
2060 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
2061 extern int side_effects_p (const_rtx);
2062 extern int volatile_refs_p (const_rtx);
2063 extern int volatile_insn_p (const_rtx);
2064 extern int may_trap_p_1 (const_rtx, unsigned);
2065 extern int may_trap_p (const_rtx);
2066 extern int may_trap_or_fault_p (const_rtx);
2067 extern bool can_throw_internal (const_rtx);
2068 extern bool can_throw_external (const_rtx);
2069 extern bool insn_could_throw_p (const_rtx);
2070 extern bool insn_nothrow_p (const_rtx);
2071 extern bool can_nonlocal_goto (const_rtx);
2072 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
2073 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
2074 extern int inequality_comparisons_p (const_rtx);
2075 extern rtx replace_rtx (rtx, rtx, rtx);
2076 extern int replace_label (rtx *, void *);
2077 extern int rtx_referenced_p (rtx, rtx);
2078 extern bool tablejump_p (const_rtx, rtx *, rtx *);
2079 extern int computed_jump_p (const_rtx);
2080 
2081 typedef int (*rtx_function) (rtx *, void *);
2082 extern int for_each_rtx (rtx *, rtx_function, void *);
2083 
2084 /* Callback for for_each_inc_dec, to process the autoinc operation OP
2085  within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is
2086  NULL. The callback is passed the same opaque ARG passed to
2087  for_each_inc_dec. Return zero to continue looking for other
2088  autoinc operations, -1 to skip OP's operands, and any other value
2089  to interrupt the traversal and return that value to the caller of
2090  for_each_inc_dec. */
2091 typedef int (*for_each_inc_dec_fn) (rtx mem, rtx op, rtx dest, rtx src,
2092  rtx srcoff, void *arg);
2093 extern int for_each_inc_dec (rtx *, for_each_inc_dec_fn, void *arg);
2094 
2095 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
2096  rtx *, rtx *);
2097 extern int rtx_equal_p_cb (const_rtx, const_rtx,
2098  rtx_equal_p_callback_function);
2099 
2100 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
2101  enum machine_mode *);
2102 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
2103  bool, hash_rtx_callback_function);
2104 
2105 extern rtx regno_use_in (unsigned int, rtx);
2106 extern int auto_inc_p (const_rtx);
2107 extern int in_expr_list_p (const_rtx, const_rtx);
2108 extern void remove_node_from_expr_list (const_rtx, rtx *);
2109 extern int loc_mentioned_in_p (rtx *, const_rtx);
2110 extern rtx find_first_parameter_load (rtx, rtx);
2111 extern bool keep_with_call_p (const_rtx);
2112 extern bool label_is_jump_target_p (const_rtx, const_rtx);
2113 extern int insn_rtx_cost (rtx, bool);
2114 
2115 /* Given an insn and condition, return a canonical description of
2116  the test being made. */
2117 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
2118 
2119 /* Given a JUMP_INSN, return a canonical description of the test
2120  being made. */
2121 extern rtx get_condition (rtx, rtx *, int, int);
2122 
2123 /* Information about a subreg of a hard register. */
2124 struct subreg_info
2125 {
2126  /* Offset of first hard register involved in the subreg. */
2127  int offset;
2128  /* Number of hard registers involved in the subreg. */
2129  int nregs;
2130  /* Whether this subreg can be represented as a hard reg with the new
2131  mode. */
2132  bool representable_p;
2133 };
2134 
2135 extern void subreg_get_info (unsigned int, enum machine_mode,
2136  unsigned int, enum machine_mode,
2137  struct subreg_info *);
2138 
2139 /* lists.c */
2140 
2141 extern void free_EXPR_LIST_list (rtx *);
2142 extern void free_INSN_LIST_list (rtx *);
2143 extern void free_EXPR_LIST_node (rtx);
2144 extern void free_INSN_LIST_node (rtx);
2145 extern rtx alloc_INSN_LIST (rtx, rtx);
2146 extern rtx copy_INSN_LIST (rtx);
2147 extern rtx concat_INSN_LIST (rtx, rtx);
2148 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
2149 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
2150 extern rtx remove_list_elem (rtx, rtx *);
2151 extern rtx remove_free_INSN_LIST_node (rtx *);
2152 extern rtx remove_free_EXPR_LIST_node (rtx *);
2153 
2154 
2155 /* reginfo.c */
2156 
2157 /* Resize reg info. */
2158 extern bool resize_reg_info (void);
2159 /* Free up register info memory. */
2160 extern void free_reg_info (void);
2161 extern void init_subregs_of_mode (void);
2162 extern void finish_subregs_of_mode (void);
2163 
2164 /* recog.c */
2165 extern rtx extract_asm_operands (rtx);
2166 extern int asm_noperands (const_rtx);
2167 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
2168  enum machine_mode *, location_t *);
2169 
2170 extern enum reg_class reg_preferred_class (int);
2171 extern enum reg_class reg_alternate_class (int);
2172 extern enum reg_class reg_allocno_class (int);
2173 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
2174  enum reg_class);
2175 
2176 extern void split_all_insns (void);
2177 extern unsigned int split_all_insns_noflow (void);
2178 
2179 #define MAX_SAVED_CONST_INT 64
2180 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
2181 
2182 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
2183 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
2184 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
2185 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
2186 extern GTY(()) rtx const_true_rtx;
2187 
2188 extern GTY(()) rtx const_tiny_rtx[4][(int) MAX_MACHINE_MODE];
2189 
2190 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
2191  same as VOIDmode. */
2192 
2193 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
2194 
2195 /* Likewise, for the constants 1 and 2 and -1. */
2196 
2197 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
2198 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
2199 #define CONSTM1_RTX(MODE) (const_tiny_rtx[3][(int) (MODE)])
2200 
2201 extern GTY(()) rtx pc_rtx;
2202 extern GTY(()) rtx cc0_rtx;
2203 extern GTY(()) rtx ret_rtx;
2204 extern GTY(()) rtx simple_return_rtx;
2205 
2206 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
2207  is used to represent the frame pointer. This is because the
2208  hard frame pointer and the automatic variables are separated by an amount
2209  that cannot be determined until after register allocation. We can assume
2210  that in this case ELIMINABLE_REGS will be defined, one action of which
2211  will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
2212 #ifndef HARD_FRAME_POINTER_REGNUM
2213 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
2214 #endif
2215 
2216 #ifndef HARD_FRAME_POINTER_IS_FRAME_POINTER
2217 #define HARD_FRAME_POINTER_IS_FRAME_POINTER \
2218  (HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM)
2219 #endif
2220 
2221 #ifndef HARD_FRAME_POINTER_IS_ARG_POINTER
2222 #define HARD_FRAME_POINTER_IS_ARG_POINTER \
2223  (HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM)
2224 #endif
2225 
2226 /* Index labels for global_rtl. */
2227 enum global_rtl_index
2228 {
2229  GR_STACK_POINTER,
2230  GR_FRAME_POINTER,
2231 /* For register elimination to work properly these hard_frame_pointer_rtx,
2232  frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2233  the same register. */
2234 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2235  GR_ARG_POINTER = GR_FRAME_POINTER,
2236 #endif
2237 #if HARD_FRAME_POINTER_IS_FRAME_POINTER
2238  GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2239 #else
2240  GR_HARD_FRAME_POINTER,
2241 #endif
2242 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2243 #if HARD_FRAME_POINTER_IS_ARG_POINTER
2244  GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2245 #else
2246  GR_ARG_POINTER,
2247 #endif
2248 #endif
2249  GR_VIRTUAL_INCOMING_ARGS,
2250  GR_VIRTUAL_STACK_ARGS,
2251  GR_VIRTUAL_STACK_DYNAMIC,
2252  GR_VIRTUAL_OUTGOING_ARGS,
2253  GR_VIRTUAL_CFA,
2254  GR_VIRTUAL_PREFERRED_STACK_BOUNDARY,
2255 
2256  GR_MAX
2257 };
2258 
2259 /* Target-dependent globals. */
2260 struct GTY(()) target_rtl {
2261  /* All references to the hard registers in global_rtl_index go through
2262  these unique rtl objects. On machines where the frame-pointer and
2263  arg-pointer are the same register, they use the same unique object.
2264 
2265  After register allocation, other rtl objects which used to be pseudo-regs
2266  may be clobbered to refer to the frame-pointer register.
2267  But references that were originally to the frame-pointer can be
2268  distinguished from the others because they contain frame_pointer_rtx.
2269 
2270  When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
2271  tricky: until register elimination has taken place hard_frame_pointer_rtx
2272  should be used if it is being set, and frame_pointer_rtx otherwise. After
2273  register elimination hard_frame_pointer_rtx should always be used.
2274  On machines where the two registers are same (most) then these are the
2275  same. */
2276  rtx x_global_rtl[GR_MAX];
2277 
2278  /* A unique representation of (REG:Pmode PIC_OFFSET_TABLE_REGNUM). */
2279  rtx x_pic_offset_table_rtx;
2280 
2281  /* A unique representation of (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM).
2282  This is used to implement __builtin_return_address for some machines;
2283  see for instance the MIPS port. */
2284  rtx x_return_address_pointer_rtx;
2285 
2286  /* Commonly used RTL for hard registers. These objects are not
2287  necessarily unique, so we allocate them separately from global_rtl.
2288  They are initialized once per compilation unit, then copied into
2289  regno_reg_rtx at the beginning of each function. */
2290  rtx x_initial_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
2291 
2292  /* A sample (mem:M stack_pointer_rtx) rtx for each mode M. */
2293  rtx x_top_of_stack[MAX_MACHINE_MODE];
2294 
2295  /* Static hunks of RTL used by the aliasing code; these are treated
2296  as persistent to avoid unnecessary RTL allocations. */
2297  rtx x_static_reg_base_value[FIRST_PSEUDO_REGISTER];
2298 
2299  /* The default memory attributes for each mode. */
2300  struct mem_attrs *x_mode_mem_attrs[(int) MAX_MACHINE_MODE];
2301 };
2302 
2303 extern GTY(()) struct target_rtl default_target_rtl;
2304 #if SWITCHABLE_TARGET
2305 extern struct target_rtl *this_target_rtl;
2306 #else
2307 #define this_target_rtl (&default_target_rtl)
2308 #endif
2309 
2310 #define global_rtl \
2311  (this_target_rtl->x_global_rtl)
2312 #define pic_offset_table_rtx \
2313  (this_target_rtl->x_pic_offset_table_rtx)
2314 #define return_address_pointer_rtx \
2315  (this_target_rtl->x_return_address_pointer_rtx)
2316 #define top_of_stack \
2317  (this_target_rtl->x_top_of_stack)
2318 #define mode_mem_attrs \
2319  (this_target_rtl->x_mode_mem_attrs)
2320 
2321 /* All references to certain hard regs, except those created
2322  by allocating pseudo regs into them (when that's possible),
2323  go through these unique rtx objects. */
2324 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2325 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2326 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2327 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2328 
2329 #ifndef GENERATOR_FILE
2330 /* Return the attributes of a MEM rtx. */
2331 static inline struct mem_attrs *
2332 get_mem_attrs (const_rtx x)
2333 {
2334  struct mem_attrs *attrs;
2335 
2336  attrs = MEM_ATTRS (x);
2337  if (!attrs)
2338  attrs = mode_mem_attrs[(int) GET_MODE (x)];
2339  return attrs;
2340 }
2341 #endif
2342 
2343 /* Include the RTL generation functions. */
2344 
2345 #ifndef GENERATOR_FILE
2346 #include "genrtl.h"
2347 #undef gen_rtx_ASM_INPUT
2348 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2349  gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2350 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2351  gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2352 #endif
2353 
2354 /* There are some RTL codes that require special attention; the
2355  generation functions included above do the raw handling. If you
2356  add to this list, modify special_rtx in gengenrtl.c as well. */
2357 
2358 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2359 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2360 extern rtx gen_raw_REG (enum machine_mode, int);
2361 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2362 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2363 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2364 
2365 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2366 
2367 /* Virtual registers are used during RTL generation to refer to locations into
2368  the stack frame when the actual location isn't known until RTL generation
2369  is complete. The routine instantiate_virtual_regs replaces these with
2370  the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2371  a constant. */
2372 
2373 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2374 
2375 /* This points to the first word of the incoming arguments passed on the stack,
2376  either by the caller or by the callee when pretending it was passed by the
2377  caller. */
2378 
2379 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2380 
2381 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2382 
2383 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2384  variable on the stack. Otherwise, it points to the first variable on
2385  the stack. */
2386 
2387 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2388 
2389 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2390 
2391 /* This points to the location of dynamically-allocated memory on the stack
2392  immediately after the stack pointer has been adjusted by the amount
2393  desired. */
2394 
2395 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2396 
2397 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2398 
2399 /* This points to the location in the stack at which outgoing arguments should
2400  be written when the stack is pre-pushed (arguments pushed using push
2401  insns always use sp). */
2402 
2403 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2404 
2405 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2406 
2407 /* This points to the Canonical Frame Address of the function. This
2408  should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2409  but is calculated relative to the arg pointer for simplicity; the
2410  frame pointer nor stack pointer are necessarily fixed relative to
2411  the CFA until after reload. */
2412 
2413 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2414 
2415 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2416 
2417 #define LAST_VIRTUAL_POINTER_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2418 
2419 /* This is replaced by crtl->preferred_stack_boundary / BITS_PER_UNIT
2420  when finalized. */
2421 
2422 #define virtual_preferred_stack_boundary_rtx \
2423  (global_rtl[GR_VIRTUAL_PREFERRED_STACK_BOUNDARY])
2424 
2425 #define VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM \
2426  ((FIRST_VIRTUAL_REGISTER) + 5)
2427 
2428 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 5)
2429 
2430 /* Nonzero if REGNUM is a pointer into the stack frame. */
2431 #define REGNO_PTR_FRAME_P(REGNUM) \
2432  ((REGNUM) == STACK_POINTER_REGNUM \
2433  || (REGNUM) == FRAME_POINTER_REGNUM \
2434  || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2435  || (REGNUM) == ARG_POINTER_REGNUM \
2436  || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2437  && (REGNUM) <= LAST_VIRTUAL_POINTER_REGISTER))
2438 
2439 /* REGNUM never really appearing in the INSN stream. */
2440 #define INVALID_REGNUM (~(unsigned int) 0)
2441 
2442 /* REGNUM for which no debug information can be generated. */
2443 #define IGNORED_DWARF_REGNUM (INVALID_REGNUM - 1)
2444 
2445 extern rtx output_constant_def (tree, int);
2446 extern rtx lookup_constant_def (tree);
2447 
2448 /* Nonzero after end of reload pass.
2449  Set to 1 or 0 by reload1.c. */
2450 
2451 extern int reload_completed;
2452 
2453 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2454 extern int epilogue_completed;
2455 
2456 /* Set to 1 while reload_as_needed is operating.
2457  Required by some machines to handle any generated moves differently. */
2458 
2459 extern int reload_in_progress;
2460 
2461 /* Set to 1 while in lra. */
2462 extern int lra_in_progress;
2463 
2464 /* This macro indicates whether you may create a new
2465  pseudo-register. */
2466 
2467 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2468 
2469 #ifdef STACK_REGS
2470 /* Nonzero after end of regstack pass.
2471  Set to 1 or 0 by reg-stack.c. */
2472 extern int regstack_completed;
2473 #endif
2474 
2475 /* If this is nonzero, we do not bother generating VOLATILE
2476  around volatile memory references, and we are willing to
2477  output indirect addresses. If cse is to follow, we reject
2478  indirect addresses so a useful potential cse is generated;
2479  if it is used only once, instruction combination will produce
2480  the same indirect address eventually. */
2481 extern int cse_not_expected;
2482 
2483 /* Translates rtx code to tree code, for those codes needed by
2484  REAL_ARITHMETIC. The function returns an int because the caller may not
2485  know what `enum tree_code' means. */
2486 
2487 extern int rtx_to_tree_code (enum rtx_code);
2488 
2489 /* In cse.c */
2490 extern int delete_trivially_dead_insns (rtx, int);
2491 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2492 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2493 
2494 /* In dse.c */
2495 extern bool check_for_inc_dec (rtx insn);
2496 
2497 /* In jump.c */
2498 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2499 extern bool jump_to_label_p (rtx);
2500 extern int condjump_p (const_rtx);
2501 extern int any_condjump_p (const_rtx);
2502 extern int any_uncondjump_p (const_rtx);
2503 extern rtx pc_set (const_rtx);
2504 extern rtx condjump_label (const_rtx);
2505 extern int simplejump_p (const_rtx);
2506 extern int returnjump_p (rtx);
2507 extern int eh_returnjump_p (rtx);
2508 extern int onlyjump_p (const_rtx);
2509 extern int only_sets_cc0_p (const_rtx);
2510 extern int sets_cc0_p (const_rtx);
2511 extern int invert_jump_1 (rtx, rtx);
2512 extern int invert_jump (rtx, rtx, int);
2513 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2514 extern int true_regnum (const_rtx);
2515 extern unsigned int reg_or_subregno (const_rtx);
2516 extern int redirect_jump_1 (rtx, rtx);
2517 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2518 extern int redirect_jump (rtx, rtx, int);
2519 extern void rebuild_jump_labels (rtx);
2520 extern void rebuild_jump_labels_chain (rtx);
2521 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2522 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2523 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2524  const_rtx, const_rtx);
2525 extern void delete_for_peephole (rtx, rtx);
2526 extern int condjump_in_parallel_p (const_rtx);
2527 
2528 /* In emit-rtl.c. */
2529 extern int max_reg_num (void);
2530 extern int max_label_num (void);
2531 extern int get_first_label_num (void);
2532 extern void maybe_set_first_label_num (rtx);
2533 extern void delete_insns_since (rtx);
2534 extern void mark_reg_pointer (rtx, int);
2535 extern void mark_user_reg (rtx);
2536 extern void reset_used_flags (rtx);
2537 extern void set_used_flags (rtx);
2538 extern void reorder_insns (rtx, rtx, rtx);
2539 extern void reorder_insns_nobb (rtx, rtx, rtx);
2540 extern int get_max_insn_count (void);
2541 extern int in_sequence_p (void);
2542 extern void init_emit (void);
2543 extern void init_emit_regs (void);
2544 extern void init_emit_once (void);
2545 extern void push_topmost_sequence (void);
2546 extern void pop_topmost_sequence (void);
2547 extern void set_new_first_and_last_insn (rtx, rtx);
2548 extern unsigned int unshare_all_rtl (void);
2549 extern void unshare_all_rtl_again (rtx);
2550 extern void unshare_all_rtl_in_chain (rtx);
2551 extern void verify_rtl_sharing (void);
2552 extern void add_insn (rtx);
2553 extern void add_insn_before (rtx, rtx, basic_block);
2554 extern void add_insn_after (rtx, rtx, basic_block);
2555 extern void remove_insn (rtx);
2556 extern rtx emit (rtx);
2557 extern void delete_insn (rtx);
2558 extern rtx entry_of_function (void);
2559 extern void emit_insn_at_entry (rtx);
2560 extern void delete_insn_chain (rtx, rtx, bool);
2561 extern rtx unlink_insn_chain (rtx, rtx);
2562 extern void delete_insn_and_edges (rtx);
2563 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2564 extern rtx gen_const_mem (enum machine_mode, rtx);
2565 extern rtx gen_frame_mem (enum machine_mode, rtx);
2566 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2567 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2568  const_rtx, unsigned int);
2569 
2570 /* In combine.c */
2571 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2572 extern rtx remove_death (unsigned int, rtx);
2573 extern void dump_combine_stats (FILE *);
2574 extern void dump_combine_total_stats (FILE *);
2575 extern rtx make_compound_operation (rtx, enum rtx_code);
2576 
2577 /* In cfgcleanup.c */
2578 extern void delete_dead_jumptables (void);
2579 
2580 /* In sched-rgn.c. */
2581 extern void schedule_insns (void);
2582 
2583 /* In sched-ebb.c. */
2584 extern void schedule_ebbs (void);
2585 
2586 /* In sel-sched-dump.c. */
2587 extern void sel_sched_fix_param (const char *param, const char *val);
2588 
2589 /* In print-rtl.c */
2590 extern const char *print_rtx_head;
2591 extern void debug (const rtx_def &ref);
2592 extern void debug (const rtx_def *ptr);
2593 extern void debug_rtx (const_rtx);
2594 extern void debug_rtx_list (const_rtx, int);
2595 extern void debug_rtx_range (const_rtx, const_rtx);
2596 extern const_rtx debug_rtx_find (const_rtx, int);
2597 extern void print_mem_expr (FILE *, const_tree);
2598 extern void print_rtl (FILE *, const_rtx);
2599 extern void print_simple_rtl (FILE *, const_rtx);
2600 extern int print_rtl_single (FILE *, const_rtx);
2601 extern int print_rtl_single_with_indent (FILE *, const_rtx, int);
2602 extern void print_inline_rtx (FILE *, const_rtx, int);
2603 
2604 /* Functions in sched-vis.c. FIXME: Ideally these functions would
2605  not be in sched-vis.c but in rtl.c, because they are not only used
2606  by the scheduler anymore but for all "slim" RTL dumping. */
2607 extern void dump_value_slim (FILE *, const_rtx, int);
2608 extern void dump_insn_slim (FILE *, const_rtx);
2609 extern void dump_rtl_slim (FILE *, const_rtx, const_rtx, int, int);
2610 extern void print_value (pretty_printer *, const_rtx, int);
2611 extern void print_pattern (pretty_printer *, const_rtx, int);
2612 extern void print_insn (pretty_printer *, const_rtx, int);
2613 extern void rtl_dump_bb_for_graph (pretty_printer *, basic_block);
2614 extern const char *str_pattern_slim (const_rtx);
2615 
2616 /* In function.c */
2617 extern void reposition_prologue_and_epilogue_notes (void);
2618 extern int prologue_epilogue_contains (const_rtx);
2619 extern int sibcall_epilogue_contains (const_rtx);
2620 extern void update_temp_slot_address (rtx, rtx);
2621 extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
2622 extern void set_return_jump_label (rtx);
2623 
2624 /* In stmt.c */
2625 extern void expand_null_return (void);
2626 extern void expand_naked_return (void);
2627 extern void emit_jump (rtx);
2628 
2629 /* In expr.c */
2630 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2631  unsigned int, int);
2632 extern HOST_WIDE_INT find_args_size_adjust (rtx);
2633 extern int fixup_args_size_notes (rtx, rtx, int);
2634 
2635 /* In cfgrtl.c */
2636 extern void print_rtl_with_bb (FILE *, const_rtx, int);
2637 extern rtx duplicate_insn_chain (rtx, rtx);
2638 
2639 /* In expmed.c */
2640 extern void init_expmed (void);
2641 extern void expand_inc (rtx, rtx);
2642 extern void expand_dec (rtx, rtx);
2643 
2644 /* In lower-subreg.c */
2645 extern void init_lower_subreg (void);
2646 
2647 /* In gcse.c */
2648 extern bool can_copy_p (enum machine_mode);
2649 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2650 extern rtx fis_get_condition (rtx);
2651 
2652 /* In ira.c */
2653 #ifdef HARD_CONST
2654 extern HARD_REG_SET eliminable_regset;
2655 #endif
2656 extern void mark_elimination (int, int);
2657 
2658 /* In reginfo.c */
2659 extern int reg_classes_intersect_p (reg_class_t, reg_class_t);
2660 extern int reg_class_subset_p (reg_class_t, reg_class_t);
2661 extern void globalize_reg (tree, int);
2662 extern void init_reg_modes_target (void);
2663 extern void init_regs (void);
2664 extern void reinit_regs (void);
2665 extern void init_fake_stack_mems (void);
2666 extern void save_register_info (void);
2667 extern void init_reg_sets (void);
2668 extern void regclass (rtx, int);
2669 extern void reg_scan (rtx, unsigned int);
2670 extern void fix_register (const char *, int, int);
2671 extern bool invalid_mode_change_p (unsigned int, enum reg_class);
2672 
2673 /* In reload1.c */
2674 extern int function_invariant_p (const_rtx);
2675 
2676 /* In calls.c */
2677 enum libcall_type
2678 {
2679  LCT_NORMAL = 0,
2680  LCT_CONST = 1,
2681  LCT_PURE = 2,
2682  LCT_NORETURN = 3,
2683  LCT_THROW = 4,
2684  LCT_RETURNS_TWICE = 5
2685 };
2686 
2687 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2688  ...);
2689 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2690  enum machine_mode, int, ...);
2691 
2692 /* In varasm.c */
2693 extern void init_varasm_once (void);
2694 
2695 extern rtx make_debug_expr_from_rtl (const_rtx);
2696 
2697 /* In read-rtl.c */
2698 extern bool read_rtx (const char *, rtx *);
2699 
2700 /* In alias.c */
2701 extern rtx canon_rtx (rtx);
2702 extern int true_dependence (const_rtx, enum machine_mode, const_rtx);
2703 extern rtx get_addr (rtx);
2704 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx,
2705  const_rtx, rtx);
2706 extern int read_dependence (const_rtx, const_rtx);
2707 extern int anti_dependence (const_rtx, const_rtx);
2708 extern int canon_anti_dependence (const_rtx, bool,
2709  const_rtx, enum machine_mode, rtx);
2710 extern int output_dependence (const_rtx, const_rtx);
2711 extern int may_alias_p (const_rtx, const_rtx);
2712 extern void init_alias_target (void);
2713 extern void init_alias_analysis (void);
2714 extern void end_alias_analysis (void);
2715 extern void vt_equate_reg_base_value (const_rtx, const_rtx);
2716 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2717 extern bool memory_must_be_modified_in_insn_p (const_rtx, const_rtx);
2718 extern bool may_be_sp_based_p (rtx);
2719 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2720 extern rtx get_reg_known_value (unsigned int);
2721 extern bool get_reg_known_equiv_p (unsigned int);
2722 extern rtx get_reg_base_value (unsigned int);
2723 
2724 #ifdef STACK_REGS
2725 extern int stack_regs_mentioned (const_rtx insn);
2726 #endif
2727 
2728 /* In toplev.c */
2729 extern GTY(()) rtx stack_limit_rtx;
2730 
2731 /* In predict.c */
2732 extern void invert_br_probabilities (rtx);
2733 extern bool expensive_function_p (int);
2734 
2735 /* In var-tracking.c */
2736 extern unsigned int variable_tracking_main (void);
2737 
2738 /* In stor-layout.c. */
2739 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2740  rtx *, rtx *);
2741 
2742 /* In loop-unswitch.c */
2743 extern rtx reversed_condition (rtx);
2744 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2745 
2746 /* In loop-iv.c */
2747 extern rtx canon_condition (rtx);
2748 extern void simplify_using_condition (rtx, rtx *, bitmap);
2749 
2750 /* In final.c */
2751 extern unsigned int compute_alignments (void);
2752 extern void update_alignments (vec<rtx> &);
2753 extern int asm_str_count (const char *templ);
2754 
2755 struct rtl_hooks
2756 {
2757  rtx (*gen_lowpart) (enum machine_mode, rtx);
2758  rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2759  rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2760  unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2761  rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2762  unsigned int, unsigned int *);
2763  bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2764 
2765  /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2766 };
2767 
2768 /* Each pass can provide its own. */
2769 extern struct rtl_hooks rtl_hooks;
2770 
2771 /* ... but then it has to restore these. */
2772 extern const struct rtl_hooks general_rtl_hooks;
2773 
2774 /* Keep this for the nonce. */
2775 #define gen_lowpart rtl_hooks.gen_lowpart
2776 
2777 extern void insn_locations_init (void);
2778 extern void insn_locations_finalize (void);
2779 extern void set_curr_insn_location (location_t);
2780 extern location_t curr_insn_location (void);
2781 extern bool optimize_insn_for_size_p (void);
2782 extern bool optimize_insn_for_speed_p (void);
2783 
2784 /* rtl-error.c */
2785 extern void _fatal_insn_not_found (const_rtx, const char *, int, const char *)
2786  ATTRIBUTE_NORETURN;
2787 extern void _fatal_insn (const char *, const_rtx, const char *, int, const char *)
2788  ATTRIBUTE_NORETURN;
2789 
2790 #define fatal_insn(msgid, insn) \
2791  _fatal_insn (msgid, insn, __FILE__, __LINE__, __FUNCTION__)
2792 #define fatal_insn_not_found(insn) \
2793  _fatal_insn_not_found (insn, __FILE__, __LINE__, __FUNCTION__)
2794 
2795 
2796 
2797 #endif /* ! GCC_RTL_H */