1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "statistics.h"
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
34 /* Value used by some passes to "recognize" noop moves as valid
36 #define NOOP_MOVE_INSN_CODE INT_MAX
38 /* Register Transfer Language EXPRESSIONS CODES */
40 #define RTX_CODE enum rtx_code
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
47 LAST_AND_UNUSED_RTX_CODE
}; /* A convenient way to get a value for
49 Assumes default enum value assignment. */
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
54 #define to_rtx_code(CODE) ((enum rtx_code) (CODE))
56 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59 /* We check bit 0-1 of some rtx class codes in the predicates below. */
61 /* Bit 0 = comparison if 0, arithmetic is 1
62 Bit 1 = 1 if commutative. */
68 /* Must follow the four preceding values. */
75 /* Bit 0 = 1 if constant. */
84 #define RTX_OBJ_MASK (~1)
85 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
86 #define RTX_COMPARE_MASK (~1)
87 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
88 #define RTX_ARITHMETIC_MASK (~1)
89 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
90 #define RTX_BINARY_MASK (~3)
91 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
92 #define RTX_COMMUTATIVE_MASK (~2)
93 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
94 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
96 extern const unsigned char rtx_length
[NUM_RTX_CODE
];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
99 extern const char * const rtx_name
[NUM_RTX_CODE
];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
102 extern const char * const rtx_format
[NUM_RTX_CODE
];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
105 extern const enum rtx_class rtx_class
[NUM_RTX_CODE
];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
108 extern const unsigned char rtx_size
[NUM_RTX_CODE
];
109 extern const unsigned char rtx_next
[NUM_RTX_CODE
];
111 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
112 relative to which the offsets are calculated, as explained in rtl.def. */
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align
: 8;
118 unsigned base_after_vec
: 1; /* BASE is after the ADDR_DIFF_VEC. */
119 unsigned min_after_vec
: 1; /* minimum address target label is
120 after the ADDR_DIFF_VEC. */
121 unsigned max_after_vec
: 1; /* maximum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned min_after_base
: 1; /* minimum address target label is
125 unsigned max_after_base
: 1; /* maximum address target label is
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned
: 1; /* offsets have to be treated as unsigned. */
131 } addr_diff_vec_flags
;
133 /* Structure used to describe the attributes of a MEM. These are hashed
134 so MEMs that the same attributes share a data structure. This means
135 they cannot be modified in place. If any element is nonzero, it means
136 the value of the corresponding attribute is unknown. */
137 /* ALIGN and SIZE are the alignment and size of the MEM itself,
138 while EXPR can describe a larger underlying object, which might have a
139 stricter alignment; OFFSET is the offset of the MEM within that object. */
140 typedef struct mem_attrs
GTY(())
142 HOST_WIDE_INT alias
; /* Memory alias set. */
143 tree expr
; /* expr corresponding to MEM. */
144 rtx offset
; /* Offset from start of DECL, as CONST_INT. */
145 rtx size
; /* Size in bytes, as a CONST_INT. */
146 unsigned int align
; /* Alignment of MEM in bits. */
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
152 typedef struct reg_attrs
GTY(())
154 tree decl
; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset
; /* Offset from start of DECL. */
158 /* Common union for an element of an rtx. */
163 unsigned int rt_uint
;
167 enum machine_mode rt_type
;
168 addr_diff_vec_flags rt_addr_diff_vec_flags
;
169 struct cselib_val_struct
*rt_cselib
;
170 struct bitmap_head_def
*rt_bit
;
172 struct basic_block_def
*rt_bb
;
176 typedef union rtunion_def rtunion
;
178 /* RTL expression ("rtx"). */
180 struct rtx_def
GTY((chain_next ("RTX_NEXT (&%h)"),
181 chain_prev ("RTX_PREV (&%h)")))
183 /* The kind of expression this is. */
184 ENUM_BITFIELD(rtx_code
) code
: 16;
186 /* The kind of value the expression has. */
187 ENUM_BITFIELD(machine_mode
) mode
: 8;
189 /* 1 in a MEM if we should keep the alias set for this mem unchanged
190 when we access a component.
191 1 in a CALL_INSN if it is a sibling call.
192 1 in a SET that is for a return.
193 In a CODE_LABEL, part of the two-bit alternate entry field. */
194 unsigned int jump
: 1;
195 /* In a CODE_LABEL, part of the two-bit alternate entry field.
196 1 in a MEM if it cannot trap. */
197 unsigned int call
: 1;
198 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
199 1 in a SUBREG if it references an unsigned object whose mode has been
200 from a promoted to a wider mode.
201 1 in a SYMBOL_REF if it addresses something in the per-function
203 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
204 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
205 unsigned int unchanging
: 1;
206 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
207 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
208 if it has been deleted.
209 1 in a REG expression if corresponds to a variable declared by the user,
210 0 for an internally generated temporary.
211 1 in a SUBREG with a negative value.
212 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
213 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
214 unsigned int volatil
: 1;
215 /* 1 in a MEM referring to a field of an aggregate.
216 0 if the MEM was a variable or the result of a * operator in C;
217 1 if it was the result of a . or -> operator (on a struct) in C.
218 1 in a REG if the register is used only in exit code a loop.
219 1 in a SUBREG expression if was generated from a variable with a
221 1 in a CODE_LABEL if the label is used for nonlocal gotos
222 and must not be deleted even if its count is zero.
223 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
224 together with the preceding insn. Valid only within sched.
225 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
226 from the target of a branch. Valid from reorg until end of compilation;
227 cleared before used. */
228 unsigned int in_struct
: 1;
229 /* At the end of RTL generation, 1 if this rtx is used. This is used for
230 copying shared structure. See `unshare_all_rtl'.
231 In a REG, this is not needed for that purpose, and used instead
232 in `leaf_renumber_regs_insn'.
233 1 in a SYMBOL_REF, means that emit_library_call
234 has used it as the function. */
235 unsigned int used
: 1;
236 /* 1 in an INSN or a SET if this rtx is related to the call frame,
237 either changing how we compute the frame address or saving and
238 restoring registers in the prologue and epilogue.
239 1 in a REG or MEM if it is a pointer.
240 1 in a SYMBOL_REF if it addresses something in the per-function
241 constant string pool. */
242 unsigned frame_related
: 1;
243 /* 1 in a REG or PARALLEL that is the current function's return value.
244 1 in a MEM if it refers to a scalar.
245 1 in a SYMBOL_REF for a weak symbol. */
246 unsigned return_val
: 1;
248 /* The first element of the operands of this rtx.
249 The number of operands and their types are controlled
250 by the `code' field, according to rtl.def. */
253 HOST_WIDE_INT hwint
[1];
254 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u
;
257 /* The size in bytes of an rtx header (code, mode and flags). */
258 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
260 /* The size in bytes of an rtx with code CODE. */
261 #define RTX_SIZE(CODE) rtx_size[CODE]
263 #define NULL_RTX (rtx) 0
265 /* The "next" and "previous" RTX, relative to this one. */
267 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
268 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
270 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
272 #define RTX_PREV(X) ((INSN_P (X) \
276 && PREV_INSN (X) != NULL \
277 && NEXT_INSN (PREV_INSN (X)) == X \
278 ? PREV_INSN (X) : NULL)
280 /* Define macros to access the `code' field of the rtx. */
282 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
283 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
285 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
286 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
288 /* RTL vector. These appear inside RTX's when there is a need
289 for a variable number of things. The principle use is inside
290 PARALLEL expressions. */
292 struct rtvec_def
GTY(()) {
293 int num_elem
; /* number of elements */
294 rtx
GTY ((length ("%h.num_elem"))) elem
[1];
297 #define NULL_RTVEC (rtvec) 0
299 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
300 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
302 /* Predicate yielding nonzero iff X is an rtx for a register. */
303 #define REG_P(X) (GET_CODE (X) == REG)
305 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
306 #define MEM_P(X) (GET_CODE (X) == MEM)
308 /* Predicate yielding nonzero iff X is a label insn. */
309 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
311 /* Predicate yielding nonzero iff X is a jump insn. */
312 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
314 /* Predicate yielding nonzero iff X is a call insn. */
315 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
317 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
318 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
320 /* Predicate yielding nonzero iff X is a real insn. */
322 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
324 /* Predicate yielding nonzero iff X is a note insn. */
325 #define NOTE_P(X) (GET_CODE (X) == NOTE)
327 /* Predicate yielding nonzero iff X is a barrier insn. */
328 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
330 /* Predicate yielding nonzero iff X is a data for a jump table. */
331 #define JUMP_TABLE_DATA_P(INSN) \
332 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
333 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
335 /* 1 if X is a unary operator. */
338 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
340 /* 1 if X is a binary operator. */
342 #define BINARY_P(X) \
343 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
345 /* 1 if X is an arithmetic operator. */
347 #define ARITHMETIC_P(X) \
348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
349 == RTX_ARITHMETIC_RESULT)
351 /* 1 if X is an arithmetic operator. */
353 #define COMMUTATIVE_ARITH_P(X) \
354 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
356 /* 1 if X is a commutative arithmetic operator or a comparison operator.
357 These two are sometimes selected together because it is possible to
358 swap the two operands. */
360 #define SWAPPABLE_OPERANDS_P(X) \
361 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
362 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
363 | (1 << RTX_COMPARE)))
365 /* 1 if X is a non-commutative operator. */
367 #define NON_COMMUTATIVE_P(X) \
368 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
369 == RTX_NON_COMMUTATIVE_RESULT)
371 /* 1 if X is a commutative operator on integers. */
373 #define COMMUTATIVE_P(X) \
374 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
375 == RTX_COMMUTATIVE_RESULT)
377 /* 1 if X is a relational operator. */
379 #define COMPARISON_P(X) \
380 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
382 /* 1 if X is a constant value that is an integer. */
384 #define CONSTANT_P(X) \
385 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
387 /* 1 if X can be used to represent an object. */
388 #define OBJECT_P(X) \
389 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
391 /* General accessor macros for accessing the fields of an rtx. */
393 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
394 /* The bit with a star outside the statement expr and an & inside is
395 so that N can be evaluated only once. */
396 #define RTL_CHECK1(RTX, N, C1) __extension__ \
397 (*({ rtx const _rtx = (RTX); const int _n = (N); \
398 const enum rtx_code _code = GET_CODE (_rtx); \
399 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
400 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
402 if (GET_RTX_FORMAT(_code)[_n] != C1) \
403 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
405 &_rtx->u.fld[_n]; }))
407 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
408 (*({ rtx const _rtx = (RTX); const int _n = (N); \
409 const enum rtx_code _code = GET_CODE (_rtx); \
410 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
411 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
413 if (GET_RTX_FORMAT(_code)[_n] != C1 \
414 && GET_RTX_FORMAT(_code)[_n] != C2) \
415 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
417 &_rtx->u.fld[_n]; }))
419 #define RTL_CHECKC1(RTX, N, C) __extension__ \
420 (*({ rtx const _rtx = (RTX); const int _n = (N); \
421 if (GET_CODE (_rtx) != (C)) \
422 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
424 &_rtx->u.fld[_n]; }))
426 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
427 (*({ rtx const _rtx = (RTX); const int _n = (N); \
428 const enum rtx_code _code = GET_CODE (_rtx); \
429 if (_code != (C1) && _code != (C2)) \
430 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
432 &_rtx->u.fld[_n]; }))
434 #define RTVEC_ELT(RTVEC, I) __extension__ \
435 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
436 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
437 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
439 &_rtvec->elem[_i]; }))
441 #define XWINT(RTX, N) __extension__ \
442 (*({ rtx const _rtx = (RTX); const int _n = (N); \
443 const enum rtx_code _code = GET_CODE (_rtx); \
444 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
445 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
447 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
448 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
450 &_rtx->u.hwint[_n]; }))
452 #define XCWINT(RTX, N, C) __extension__ \
453 (*({ rtx const _rtx = (RTX); \
454 if (GET_CODE (_rtx) != (C)) \
455 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
457 &_rtx->u.hwint[N]; }))
459 extern void rtl_check_failed_bounds (rtx
, int, const char *, int,
462 extern void rtl_check_failed_type1 (rtx
, int, int, const char *, int,
465 extern void rtl_check_failed_type2 (rtx
, int, int, int, const char *,
468 extern void rtl_check_failed_code1 (rtx
, enum rtx_code
, const char *,
471 extern void rtl_check_failed_code2 (rtx
, enum rtx_code
, enum rtx_code
,
472 const char *, int, const char *)
474 extern void rtvec_check_failed_bounds (rtvec
, int, const char *, int,
478 #else /* not ENABLE_RTL_CHECKING */
480 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
481 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
482 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
483 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
484 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
485 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
486 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
490 /* General accessor macros for accessing the flags of an rtx. */
492 /* Access an individual rtx flag, with no checking of any kind. */
493 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
495 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
496 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
497 ({ rtx const _rtx = (RTX); \
498 if (GET_CODE(_rtx) != C1) \
499 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
503 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
504 ({ rtx const _rtx = (RTX); \
505 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
506 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
510 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
511 ({ rtx const _rtx = (RTX); \
512 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
513 && GET_CODE(_rtx) != C3) \
514 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
518 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
519 ({ rtx const _rtx = (RTX); \
520 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
521 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
522 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
526 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
527 ({ rtx const _rtx = (RTX); \
528 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
529 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
530 && GET_CODE(_rtx) != C5) \
531 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
535 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
537 ({ rtx const _rtx = (RTX); \
538 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
539 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
540 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
541 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
545 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
547 ({ rtx const _rtx = (RTX); \
548 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
549 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
550 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
551 && GET_CODE(_rtx) != C7) \
552 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
556 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
558 ({ rtx const _rtx = (RTX); \
559 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
560 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
561 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
562 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
563 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
567 extern void rtl_check_failed_flag (const char *, rtx
, const char *,
572 #else /* not ENABLE_RTL_FLAG_CHECKING */
574 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
575 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
576 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
577 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
578 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
579 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
580 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
581 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
584 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
585 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
586 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
587 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
588 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
589 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
590 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
591 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
592 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
594 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
595 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
597 /* These are like XINT, etc. except that they expect a '0' field instead
598 of the normal type code. */
600 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
601 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
602 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
603 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
604 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
605 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
606 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
607 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
608 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
609 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
610 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
611 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
612 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
614 /* Access a '0' field with any type. */
615 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
617 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
618 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
619 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
620 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
621 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
622 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
623 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
624 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
625 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
626 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
628 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
629 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
631 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
633 /* ACCESS MACROS for particular fields of insns. */
635 /* Holds a unique number for each insn.
636 These are not necessarily sequentially increasing. */
637 #define INSN_UID(INSN) XINT (INSN, 0)
639 /* Chain insns together in sequence. */
640 #define PREV_INSN(INSN) XEXP (INSN, 1)
641 #define NEXT_INSN(INSN) XEXP (INSN, 2)
643 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
644 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
645 /* The body of an insn. */
646 #define PATTERN(INSN) XEXP (INSN, 5)
648 /* Code number of instruction, from when it was recognized.
649 -1 means this instruction has not been recognized yet. */
650 #define INSN_CODE(INSN) XINT (INSN, 6)
652 /* Set up in flow.c; empty before then.
653 Holds a chain of INSN_LIST rtx's whose first operands point at
654 previous insns with direct data-flow connections to this one.
655 That means that those insns set variables whose next use is in this insn.
656 They are always in the same basic block as this insn. */
657 #define LOG_LINKS(INSN) XEXP(INSN, 7)
659 #define RTX_FRAME_RELATED_P(RTX) \
660 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
661 JUMP_INSN, BARRIER, SET)->frame_related)
663 /* 1 if RTX is an insn that has been deleted. */
664 #define INSN_DELETED_P(RTX) \
665 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
666 CODE_LABEL, BARRIER, NOTE)->volatil)
668 /* 1 if RTX is a call to a const or pure function. */
669 #define CONST_OR_PURE_CALL_P(RTX) \
670 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
671 EXPR_LIST)->unchanging)
673 /* 1 if RTX is a call_insn for a sibling call. */
674 #define SIBLING_CALL_P(RTX) \
675 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
677 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
678 #define INSN_ANNULLED_BRANCH_P(RTX) \
679 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
681 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
682 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
683 executed if the branch is taken. For annulled branches with this bit
684 clear, the insn should be executed only if the branch is not taken. */
685 #define INSN_FROM_TARGET_P(RTX) \
686 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
688 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
689 See the comments for ADDR_DIFF_VEC in rtl.def. */
690 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
692 /* In a VALUE, the value cselib has assigned to RTX.
693 This is a "struct cselib_val_struct", see cselib.h. */
694 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
696 /* Holds a list of notes on what this insn does to various REGs.
697 It is a chain of EXPR_LIST rtx's, where the second operand is the
698 chain pointer and the first operand is the REG being described.
699 The mode field of the EXPR_LIST contains not a real machine mode
700 but a value from enum reg_note. */
701 #define REG_NOTES(INSN) XEXP(INSN, 8)
705 #define DEF_REG_NOTE(NAME) NAME,
706 #include "reg-notes.def"
711 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
712 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
713 #define PUT_REG_NOTE_KIND(LINK, KIND) \
714 PUT_MODE (LINK, (enum machine_mode) (KIND))
716 /* Names for REG_NOTE's in EXPR_LIST insn's. */
718 extern const char * const reg_note_name
[];
719 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
721 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
722 USE and CLOBBER expressions.
723 USE expressions list the registers filled with arguments that
724 are passed to the function.
725 CLOBBER expressions document the registers explicitly clobbered
727 Pseudo registers can not be mentioned in this list. */
728 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
730 /* The label-number of a code-label. The assembler label
731 is made from `L' and the label-number printed in decimal.
732 Label numbers are unique in a compilation. */
733 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
735 /* In a NOTE that is a line number, this is a string for the file name that the
736 line is in. We use the same field to record block numbers temporarily in
737 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
738 between ints and pointers if we use a different macro for the block number.)
742 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
743 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
744 #ifdef USE_MAPPED_LOCATION
745 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
746 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
747 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
748 #define SET_INSN_DELETED(INSN) \
749 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
751 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
752 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
753 (XLOC).line = NOTE_LINE_NUMBER (INSN))
754 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
755 #define SET_INSN_DELETED(INSN) \
756 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
757 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
759 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
760 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
761 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
762 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
763 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
765 /* In a NOTE that is a line number, this is the line number.
766 Other kinds of NOTEs are identified by negative numbers here. */
767 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
769 /* Nonzero if INSN is a note marking the beginning of a basic block. */
770 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
771 (GET_CODE (INSN) == NOTE \
772 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
774 /* Variable declaration and the location of a variable. */
775 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
777 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
780 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
781 that are not line numbers. These codes are all negative.
783 Notice that we do not try to use zero here for any of
784 the special note codes because sometimes the source line
785 actually can be zero! This happens (for example) when we
786 are generating code for the per-translation-unit constructor
787 and destructor routines for some C++ translation unit. */
791 /* Keep all of these numbers negative. Adjust as needed. */
792 NOTE_INSN_BIAS
= -100,
794 #define DEF_INSN_NOTE(NAME) NAME,
795 #include "insn-notes.def"
801 /* Names for NOTE insn's other than line numbers. */
803 extern const char * const note_insn_name
[NOTE_INSN_MAX
- NOTE_INSN_BIAS
];
804 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
805 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
807 /* The name of a label, in case it corresponds to an explicit label
808 in the input source code. */
809 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
811 /* In jump.c, each label contains a count of the number
812 of LABEL_REFs that point at it, so unused labels can be deleted. */
813 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
815 /* Labels carry a two-bit field composed of the ->jump and ->call
816 bits. This field indicates whether the label is an alternate
817 entry point, and if so, what kind. */
820 LABEL_NORMAL
= 0, /* ordinary label */
821 LABEL_STATIC_ENTRY
, /* alternate entry point, not exported */
822 LABEL_GLOBAL_ENTRY
, /* alternate entry point, exported */
823 LABEL_WEAK_ENTRY
/* alternate entry point, exported as weak symbol */
826 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
828 /* Retrieve the kind of LABEL. */
829 #define LABEL_KIND(LABEL) __extension__ \
830 ({ rtx const _label = (LABEL); \
831 if (GET_CODE (_label) != CODE_LABEL) \
832 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
834 (enum label_kind) ((_label->jump << 1) | _label->call); })
836 /* Set the kind of LABEL. */
837 #define SET_LABEL_KIND(LABEL, KIND) do { \
838 rtx _label = (LABEL); \
839 unsigned int _kind = (KIND); \
840 if (GET_CODE (_label) != CODE_LABEL) \
841 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
843 _label->jump = ((_kind >> 1) & 1); \
844 _label->call = (_kind & 1); \
849 /* Retrieve the kind of LABEL. */
850 #define LABEL_KIND(LABEL) \
851 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
853 /* Set the kind of LABEL. */
854 #define SET_LABEL_KIND(LABEL, KIND) do { \
855 rtx _label = (LABEL); \
856 unsigned int _kind = (KIND); \
857 _label->jump = ((_kind >> 1) & 1); \
858 _label->call = (_kind & 1); \
861 #endif /* rtl flag checking */
863 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
865 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
866 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
867 be decremented and possibly the label can be deleted. */
868 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
870 /* Once basic blocks are found in flow.c,
871 each CODE_LABEL starts a chain that goes through
872 all the LABEL_REFs that jump to that label.
873 The chain eventually winds up at the CODE_LABEL: it is circular. */
874 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
876 /* This is the field in the LABEL_REF through which the circular chain
877 of references to a particular label is linked.
878 FIXME: This chain is used in loop.c and in the SH backend.
879 Since loop.c is about to go away, it could be a win to replace
880 the uses of this in the SH backend with something else. */
881 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
883 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
884 the number the register originally had; for a pseudo register turned into
885 a hard reg this will hold the old pseudo register number. */
887 #define REGNO(RTX) XCUINT (RTX, 0, REG)
888 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
890 /* 1 if RTX is a reg or parallel that is the current function's return
892 #define REG_FUNCTION_VALUE_P(RTX) \
893 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
895 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
896 #define REG_USERVAR_P(RTX) \
897 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
899 /* 1 if RTX is a reg that holds a pointer value. */
900 #define REG_POINTER(RTX) \
901 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
903 /* 1 if RTX is a mem that holds a pointer value. */
904 #define MEM_POINTER(RTX) \
905 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
907 /* 1 if the given register REG corresponds to a hard register. */
908 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
910 /* 1 if the given register number REG_NO corresponds to a hard register. */
911 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
913 /* For a CONST_INT rtx, INTVAL extracts the integer. */
914 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
916 /* For a CONST_DOUBLE:
917 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
918 low-order word and ..._HIGH the high-order.
919 For a float, there is a REAL_VALUE_TYPE structure, and
920 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
921 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
922 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
923 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
925 /* For a CONST_VECTOR, return element #n. */
926 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
928 /* For a CONST_VECTOR, return the number of elements in a vector. */
929 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
931 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
932 SUBREG_BYTE extracts the byte-number. */
934 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
935 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
938 /* Return the right cost to give to an operation
939 to make the cost of the corresponding register-to-register instruction
940 N times that of a fast register-to-register instruction. */
941 #define COSTS_N_INSNS(N) ((N) * 4)
943 /* Maximum cost of an rtl expression. This value has the special meaning
944 not to use an rtx with this cost under any circumstances. */
945 #define MAX_COST INT_MAX
947 extern void init_rtlanal (void);
948 extern int rtx_cost (rtx
, enum rtx_code
);
949 extern int address_cost (rtx
, enum machine_mode
);
950 extern unsigned int subreg_lsb (rtx
);
951 extern unsigned int subreg_lsb_1 (enum machine_mode
, enum machine_mode
,
953 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode
,
954 unsigned int, enum machine_mode
);
955 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode
,
956 unsigned int, enum machine_mode
);
957 extern unsigned int subreg_regno (rtx
);
958 extern unsigned HOST_WIDE_INT
nonzero_bits (rtx
, enum machine_mode
);
959 extern unsigned int num_sign_bit_copies (rtx
, enum machine_mode
);
962 /* 1 if RTX is a subreg containing a reg that is already known to be
963 sign- or zero-extended from the mode of the subreg to the mode of
964 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
967 When used as a LHS, is means that this extension must be done
968 when assigning to SUBREG_REG. */
970 #define SUBREG_PROMOTED_VAR_P(RTX) \
971 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
973 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
975 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
980 _rtx->unchanging = (VAL); \
983 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
984 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
985 ? -1 : (RTX)->unchanging)
987 /* Access various components of an ASM_OPERANDS rtx. */
989 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
990 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
991 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
992 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
993 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
994 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
995 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
996 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
997 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
998 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
999 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1000 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1001 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1002 #ifdef USE_MAPPED_LOCATION
1003 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1005 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1006 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1009 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1010 #define MEM_READONLY_P(RTX) \
1011 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1013 /* 1 if RTX is a mem and we should keep the alias set for this mem
1014 unchanged when we access a component. Set to 1, or example, when we
1015 are already in a non-addressable component of an aggregate. */
1016 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1017 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1019 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1020 #define MEM_VOLATILE_P(RTX) \
1021 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1022 ASM_INPUT)->volatil)
1024 /* 1 if RTX is a mem that refers to an aggregate, either to the
1025 aggregate itself of to a field of the aggregate. If zero, RTX may
1026 or may not be such a reference. */
1027 #define MEM_IN_STRUCT_P(RTX) \
1028 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1030 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1031 not refer to a scalar. */
1032 #define MEM_SCALAR_P(RTX) \
1033 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1035 /* 1 if RTX is a mem that cannot trap. */
1036 #define MEM_NOTRAP_P(RTX) \
1037 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1039 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1040 RTX. Otherwise, vice versa. Use this macro only when you are
1041 *sure* that you know that the MEM is in a structure, or is a
1042 scalar. VAL is evaluated only once. */
1043 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1047 MEM_IN_STRUCT_P (RTX) = 1; \
1048 MEM_SCALAR_P (RTX) = 0; \
1052 MEM_IN_STRUCT_P (RTX) = 0; \
1053 MEM_SCALAR_P (RTX) = 1; \
1057 /* The memory attribute block. We provide access macros for each value
1058 in the block and provide defaults if none specified. */
1059 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1061 /* The register attribute block. We provide access macros for each value
1062 in the block and provide defaults if none specified. */
1063 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1065 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1066 set, and may alias anything. Otherwise, the MEM can only alias
1067 MEMs in a conflicting alias set. This value is set in a
1068 language-dependent manner in the front-end, and should not be
1069 altered in the back-end. These set numbers are tested with
1070 alias_sets_conflict_p. */
1071 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1073 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1074 refer to part of a DECL. It may also be a COMPONENT_REF. */
1075 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1077 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1078 RTX that is always a CONST_INT. */
1079 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1081 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1082 is always a CONST_INT. */
1083 #define MEM_SIZE(RTX) \
1084 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1085 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1088 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1089 mode as a default when STRICT_ALIGNMENT, but not if not. */
1090 #define MEM_ALIGN(RTX) \
1091 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1092 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1093 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1095 /* For a REG rtx, the decl it is known to refer to, if it is known to
1096 refer to part of a DECL. */
1097 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1099 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1100 RTX that is always a CONST_INT. */
1101 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1103 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1104 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1105 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1106 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1107 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1108 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1109 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1110 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1111 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1113 /* 1 if RTX is a label_ref to a label outside the loop containing the
1115 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1116 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1118 /* 1 if RTX is a label_ref for a nonlocal label. */
1119 /* Likewise in an expr_list for a reg_label note. */
1120 #define LABEL_REF_NONLOCAL_P(RTX) \
1121 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1122 REG_LABEL)->volatil)
1124 /* 1 if RTX is a code_label that should always be considered to be needed. */
1125 #define LABEL_PRESERVE_P(RTX) \
1126 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1128 /* During sched, 1 if RTX is an insn that must be scheduled together
1129 with the preceding insn. */
1130 #define SCHED_GROUP_P(RTX) \
1131 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1134 /* For a SET rtx, SET_DEST is the place that is set
1135 and SET_SRC is the value it is set to. */
1136 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1137 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1138 #define SET_IS_RETURN_P(RTX) \
1139 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1141 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1142 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1143 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1145 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1146 conditionally executing the code on, COND_EXEC_CODE is the code
1147 to execute if the condition is true. */
1148 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1149 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1151 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1153 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1154 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1156 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1157 tree constant pool. This information is private to varasm.c. */
1158 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1159 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1160 (RTX), SYMBOL_REF)->frame_related)
1162 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1163 #define SYMBOL_REF_FLAG(RTX) \
1164 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1166 /* 1 if RTX is a symbol_ref that has been the library function in
1167 emit_library_call. */
1168 #define SYMBOL_REF_USED(RTX) \
1169 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1171 /* 1 if RTX is a symbol_ref for a weak symbol. */
1172 #define SYMBOL_REF_WEAK(RTX) \
1173 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1175 /* The tree (decl or constant) associated with the symbol, or null. */
1176 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1178 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1179 information derivable from the tree decl associated with this symbol.
1180 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1181 decl. In some cases this is a bug. But beyond that, it's nice to cache
1182 this information to avoid recomputing it. Finally, this allows space for
1183 the target to store more than one bit of information, as with
1185 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1187 /* These flags are common enough to be defined for all targets. They
1188 are computed by the default version of targetm.encode_section_info. */
1190 /* Set if this symbol is a function. */
1191 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1192 #define SYMBOL_REF_FUNCTION_P(RTX) \
1193 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1194 /* Set if targetm.binds_local_p is true. */
1195 #define SYMBOL_FLAG_LOCAL (1 << 1)
1196 #define SYMBOL_REF_LOCAL_P(RTX) \
1197 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1198 /* Set if targetm.in_small_data_p is true. */
1199 #define SYMBOL_FLAG_SMALL (1 << 2)
1200 #define SYMBOL_REF_SMALL_P(RTX) \
1201 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1202 /* The three-bit field at [5:3] is true for TLS variables; use
1203 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1204 #define SYMBOL_FLAG_TLS_SHIFT 3
1205 #define SYMBOL_REF_TLS_MODEL(RTX) \
1206 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1207 /* Set if this symbol is not defined in this translation unit. */
1208 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1209 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1210 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1212 /* Subsequent bits are available for the target to use. */
1213 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1214 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1216 /* Define a macro to look for REG_INC notes,
1217 but save time on machines where they never exist. */
1219 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1220 #define FIND_REG_INC_NOTE(INSN, REG) \
1221 ((REG) != NULL_RTX && REG_P ((REG)) \
1222 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1223 : find_reg_note ((INSN), REG_INC, (REG)))
1225 #define FIND_REG_INC_NOTE(INSN, REG) 0
1228 /* Indicate whether the machine has any sort of auto increment addressing.
1229 If not, we can avoid checking for REG_INC notes. */
1231 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1232 #define AUTO_INC_DEC
1235 #ifndef HAVE_PRE_INCREMENT
1236 #define HAVE_PRE_INCREMENT 0
1239 #ifndef HAVE_PRE_DECREMENT
1240 #define HAVE_PRE_DECREMENT 0
1243 #ifndef HAVE_POST_INCREMENT
1244 #define HAVE_POST_INCREMENT 0
1247 #ifndef HAVE_POST_DECREMENT
1248 #define HAVE_POST_DECREMENT 0
1251 #ifndef HAVE_POST_MODIFY_DISP
1252 #define HAVE_POST_MODIFY_DISP 0
1255 #ifndef HAVE_POST_MODIFY_REG
1256 #define HAVE_POST_MODIFY_REG 0
1259 #ifndef HAVE_PRE_MODIFY_DISP
1260 #define HAVE_PRE_MODIFY_DISP 0
1263 #ifndef HAVE_PRE_MODIFY_REG
1264 #define HAVE_PRE_MODIFY_REG 0
1268 /* Some architectures do not have complete pre/post increment/decrement
1269 instruction sets, or only move some modes efficiently. These macros
1270 allow us to tune autoincrement generation. */
1272 #ifndef USE_LOAD_POST_INCREMENT
1273 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1276 #ifndef USE_LOAD_POST_DECREMENT
1277 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1280 #ifndef USE_LOAD_PRE_INCREMENT
1281 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1284 #ifndef USE_LOAD_PRE_DECREMENT
1285 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1288 #ifndef USE_STORE_POST_INCREMENT
1289 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1292 #ifndef USE_STORE_POST_DECREMENT
1293 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1296 #ifndef USE_STORE_PRE_INCREMENT
1297 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1300 #ifndef USE_STORE_PRE_DECREMENT
1301 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1304 /* Nonzero when we are generating CONCATs. */
1305 extern int generating_concat_p
;
1307 /* Nonzero when we are expanding trees to RTL. */
1308 extern int currently_expanding_to_rtl
;
1310 /* Generally useful functions. */
1313 extern int ceil_log2 (unsigned HOST_WIDE_INT
);
1316 extern rtx
expand_builtin_expect_jump (tree
, rtx
, rtx
);
1319 extern void set_stack_check_libfunc (rtx
);
1320 extern HOST_WIDE_INT
trunc_int_for_mode (HOST_WIDE_INT
, enum machine_mode
);
1321 extern rtx
plus_constant (rtx
, HOST_WIDE_INT
);
1324 extern rtvec
gen_rtvec (int, ...);
1325 extern rtx
copy_insn_1 (rtx
);
1326 extern rtx
copy_insn (rtx
);
1327 extern rtx
gen_int_mode (HOST_WIDE_INT
, enum machine_mode
);
1328 extern rtx
emit_copy_of_insn_after (rtx
, rtx
);
1329 extern void set_reg_attrs_from_mem (rtx
, rtx
);
1330 extern void set_mem_attrs_from_reg (rtx
, rtx
);
1331 extern void set_reg_attrs_for_parm (rtx
, rtx
);
1332 extern int mem_expr_equal_p (tree
, tree
);
1335 extern rtx
rtx_alloc_stat (RTX_CODE MEM_STAT_DECL
);
1336 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1338 extern rtvec
rtvec_alloc (int);
1339 extern rtx
copy_rtx (rtx
);
1340 extern void dump_rtx_statistics (void);
1343 extern rtx
copy_rtx_if_shared (rtx
);
1346 extern rtx
shallow_copy_rtx_stat (rtx MEM_STAT_DECL
);
1347 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1348 extern int rtx_equal_p (rtx
, rtx
);
1351 extern rtvec
gen_rtvec_v (int, rtx
*);
1352 extern rtx
gen_reg_rtx (enum machine_mode
);
1353 extern rtx
gen_rtx_REG_offset (rtx
, enum machine_mode
, unsigned int, int);
1354 extern rtx
gen_label_rtx (void);
1355 extern rtx
gen_lowpart_common (enum machine_mode
, rtx
);
1358 extern rtx
gen_lowpart_if_possible (enum machine_mode
, rtx
);
1361 extern rtx
gen_highpart (enum machine_mode
, rtx
);
1362 extern rtx
gen_highpart_mode (enum machine_mode
, enum machine_mode
, rtx
);
1363 extern rtx
operand_subword (rtx
, unsigned int, int, enum machine_mode
);
1366 extern rtx
operand_subword_force (rtx
, unsigned int, enum machine_mode
);
1367 extern int subreg_lowpart_p (rtx
);
1368 extern unsigned int subreg_lowpart_offset (enum machine_mode
,
1370 extern unsigned int subreg_highpart_offset (enum machine_mode
,
1372 extern rtx
make_safe_from (rtx
, rtx
);
1373 extern rtx
convert_memory_address (enum machine_mode
, rtx
);
1374 extern rtx
get_insns (void);
1375 extern const char *get_insn_name (int);
1376 extern rtx
get_last_insn (void);
1377 extern rtx
get_last_insn_anywhere (void);
1378 extern rtx
get_first_nonnote_insn (void);
1379 extern rtx
get_last_nonnote_insn (void);
1380 extern void start_sequence (void);
1381 extern void push_to_sequence (rtx
);
1382 extern void end_sequence (void);
1383 extern rtx
immed_double_const (HOST_WIDE_INT
, HOST_WIDE_INT
,
1388 extern rtx
lowpart_subreg (enum machine_mode
, rtx
, enum machine_mode
);
1391 extern rtx
force_const_mem (enum machine_mode
, rtx
);
1396 extern rtx
get_pool_constant (rtx
);
1397 extern rtx
get_pool_constant_mark (rtx
, bool *);
1398 extern enum machine_mode
get_pool_mode (rtx
);
1399 extern rtx
get_pool_constant_for_function (struct function
*, rtx
);
1400 extern rtx
simplify_subtraction (rtx
);
1403 extern rtx
assign_stack_local (enum machine_mode
, HOST_WIDE_INT
, int);
1404 extern rtx
assign_stack_temp (enum machine_mode
, HOST_WIDE_INT
, int);
1405 extern rtx
assign_stack_temp_for_type (enum machine_mode
,
1406 HOST_WIDE_INT
, int, tree
);
1407 extern rtx
assign_temp (tree
, int, int, int);
1410 extern rtx
emit_insn_before (rtx
, rtx
);
1411 extern rtx
emit_insn_before_noloc (rtx
, rtx
);
1412 extern rtx
emit_insn_before_setloc (rtx
, rtx
, int);
1413 extern rtx
emit_jump_insn_before (rtx
, rtx
);
1414 extern rtx
emit_jump_insn_before_noloc (rtx
, rtx
);
1415 extern rtx
emit_jump_insn_before_setloc (rtx
, rtx
, int);
1416 extern rtx
emit_call_insn_before (rtx
, rtx
);
1417 extern rtx
emit_call_insn_before_noloc (rtx
, rtx
);
1418 extern rtx
emit_call_insn_before_setloc (rtx
, rtx
, int);
1419 extern rtx
emit_barrier_before (rtx
);
1420 extern rtx
emit_label_before (rtx
, rtx
);
1421 extern rtx
emit_note_before (int, rtx
);
1422 extern rtx
emit_insn_after (rtx
, rtx
);
1423 extern rtx
emit_insn_after_noloc (rtx
, rtx
);
1424 extern rtx
emit_insn_after_setloc (rtx
, rtx
, int);
1425 extern rtx
emit_jump_insn_after (rtx
, rtx
);
1426 extern rtx
emit_jump_insn_after_noloc (rtx
, rtx
);
1427 extern rtx
emit_jump_insn_after_setloc (rtx
, rtx
, int);
1428 extern rtx
emit_call_insn_after (rtx
, rtx
);
1429 extern rtx
emit_call_insn_after_noloc (rtx
, rtx
);
1430 extern rtx
emit_call_insn_after_setloc (rtx
, rtx
, int);
1431 extern rtx
emit_barrier_after (rtx
);
1432 extern rtx
emit_label_after (rtx
, rtx
);
1433 extern rtx
emit_note_after (int, rtx
);
1434 extern rtx
emit_note_copy_after (rtx
, rtx
);
1435 extern rtx
emit_insn (rtx
);
1436 extern rtx
emit_jump_insn (rtx
);
1437 extern rtx
emit_call_insn (rtx
);
1438 extern rtx
emit_label (rtx
);
1439 extern rtx
emit_barrier (void);
1440 extern rtx
emit_note (int);
1441 extern rtx
emit_note_copy (rtx
);
1442 extern rtx
emit_line_note (location_t
);
1443 extern rtx
make_insn_raw (rtx
);
1444 extern void add_function_usage_to (rtx
, rtx
);
1445 extern rtx
last_call_insn (void);
1446 extern rtx
previous_insn (rtx
);
1447 extern rtx
next_insn (rtx
);
1448 extern rtx
prev_nonnote_insn (rtx
);
1449 extern rtx
next_nonnote_insn (rtx
);
1450 extern rtx
prev_real_insn (rtx
);
1451 extern rtx
next_real_insn (rtx
);
1452 extern rtx
prev_active_insn (rtx
);
1453 extern rtx
next_active_insn (rtx
);
1454 extern int active_insn_p (rtx
);
1455 extern rtx
prev_label (rtx
);
1456 extern rtx
next_label (rtx
);
1457 extern rtx
skip_consecutive_labels (rtx
);
1458 extern rtx
next_cc0_user (rtx
);
1459 extern rtx
prev_cc0_setter (rtx
);
1461 /* In cfglayout.c */
1462 extern int insn_line (rtx
);
1463 extern const char * insn_file (rtx
);
1464 extern int locator_line (int);
1465 extern const char * locator_file (int);
1466 extern int prologue_locator
, epilogue_locator
;
1469 extern enum rtx_code
reverse_condition (enum rtx_code
);
1470 extern enum rtx_code
reverse_condition_maybe_unordered (enum rtx_code
);
1471 extern enum rtx_code
swap_condition (enum rtx_code
);
1472 extern enum rtx_code
unsigned_condition (enum rtx_code
);
1473 extern enum rtx_code
signed_condition (enum rtx_code
);
1474 extern void mark_jump_label (rtx
, rtx
, int);
1475 extern void cleanup_barriers (void);
1478 extern bool squeeze_notes (rtx
*, rtx
*);
1479 extern rtx
delete_related_insns (rtx
);
1480 extern void delete_jump (rtx
);
1481 extern rtx
get_label_before (rtx
);
1482 extern rtx
get_label_after (rtx
);
1483 extern rtx
follow_jumps (rtx
);
1486 extern rtx
*find_constant_term_loc (rtx
*);
1489 extern rtx
try_split (rtx
, rtx
, int);
1490 extern int split_branch_probability
;
1492 /* In unknown file */
1493 extern rtx
split_insns (rtx
, rtx
);
1495 /* In simplify-rtx.c */
1496 extern rtx
simplify_const_unary_operation (enum rtx_code
, enum machine_mode
,
1497 rtx
, enum machine_mode
);
1498 extern rtx
simplify_unary_operation (enum rtx_code
, enum machine_mode
, rtx
,
1500 extern rtx
simplify_const_binary_operation (enum rtx_code
, enum machine_mode
,
1502 extern rtx
simplify_binary_operation (enum rtx_code
, enum machine_mode
, rtx
,
1504 extern rtx
simplify_ternary_operation (enum rtx_code
, enum machine_mode
,
1505 enum machine_mode
, rtx
, rtx
, rtx
);
1506 extern rtx
simplify_const_relational_operation (enum rtx_code
,
1507 enum machine_mode
, rtx
, rtx
);
1508 extern rtx
simplify_relational_operation (enum rtx_code
, enum machine_mode
,
1509 enum machine_mode
, rtx
, rtx
);
1510 extern rtx
simplify_gen_binary (enum rtx_code
, enum machine_mode
, rtx
, rtx
);
1511 extern rtx
simplify_gen_unary (enum rtx_code
, enum machine_mode
, rtx
,
1513 extern rtx
simplify_gen_ternary (enum rtx_code
, enum machine_mode
,
1514 enum machine_mode
, rtx
, rtx
, rtx
);
1515 extern rtx
simplify_gen_relational (enum rtx_code
, enum machine_mode
,
1516 enum machine_mode
, rtx
, rtx
);
1517 extern rtx
simplify_subreg (enum machine_mode
, rtx
, enum machine_mode
,
1519 extern rtx
simplify_gen_subreg (enum machine_mode
, rtx
, enum machine_mode
,
1521 extern rtx
simplify_replace_rtx (rtx
, rtx
, rtx
);
1522 extern rtx
simplify_rtx (rtx
);
1523 extern rtx
avoid_constant_pool_reference (rtx
);
1524 extern bool mode_signbit_p (enum machine_mode
, rtx
);
1527 extern enum machine_mode
choose_hard_reg_mode (unsigned int, unsigned int,
1531 extern rtx
set_unique_reg_note (rtx
, enum reg_note
, rtx
);
1533 /* Functions in rtlanal.c */
1535 /* Single set is implemented as macro for performance reasons. */
1536 #define single_set(I) (INSN_P (I) \
1537 ? (GET_CODE (PATTERN (I)) == SET \
1538 ? PATTERN (I) : single_set_1 (I)) \
1540 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1542 /* Structure used for passing data to REPLACE_LABEL. */
1543 typedef struct replace_label_data
1547 bool update_label_nuses
;
1548 } replace_label_data
;
1550 extern int rtx_addr_can_trap_p (rtx
);
1551 extern bool nonzero_address_p (rtx
);
1552 extern int rtx_unstable_p (rtx
);
1553 extern int rtx_varies_p (rtx
, int);
1554 extern int rtx_addr_varies_p (rtx
, int);
1555 extern HOST_WIDE_INT
get_integer_term (rtx
);
1556 extern rtx
get_related_value (rtx
);
1557 extern int global_reg_mentioned_p (rtx
);
1558 extern int reg_mentioned_p (rtx
, rtx
);
1559 extern int count_occurrences (rtx
, rtx
, int);
1560 extern int reg_referenced_p (rtx
, rtx
);
1561 extern int reg_used_between_p (rtx
, rtx
, rtx
);
1562 extern int reg_set_between_p (rtx
, rtx
, rtx
);
1563 extern int commutative_operand_precedence (rtx
);
1564 extern int swap_commutative_operands_p (rtx
, rtx
);
1565 extern int modified_between_p (rtx
, rtx
, rtx
);
1566 extern int no_labels_between_p (rtx
, rtx
);
1567 extern int modified_in_p (rtx
, rtx
);
1568 extern int reg_set_p (rtx
, rtx
);
1569 extern rtx
single_set_2 (rtx
, rtx
);
1570 extern int multiple_sets (rtx
);
1571 extern int set_noop_p (rtx
);
1572 extern int noop_move_p (rtx
);
1573 extern rtx
find_last_value (rtx
, rtx
*, rtx
, int);
1574 extern int refers_to_regno_p (unsigned int, unsigned int, rtx
, rtx
*);
1575 extern int reg_overlap_mentioned_p (rtx
, rtx
);
1576 extern rtx
set_of (rtx
, rtx
);
1577 extern void note_stores (rtx
, void (*) (rtx
, rtx
, void *), void *);
1578 extern void note_uses (rtx
*, void (*) (rtx
*, void *), void *);
1579 extern int dead_or_set_p (rtx
, rtx
);
1580 extern int dead_or_set_regno_p (rtx
, unsigned int);
1581 extern rtx
find_reg_note (rtx
, enum reg_note
, rtx
);
1582 extern rtx
find_regno_note (rtx
, enum reg_note
, unsigned int);
1583 extern rtx
find_reg_equal_equiv_note (rtx
);
1584 extern int find_reg_fusage (rtx
, enum rtx_code
, rtx
);
1585 extern int find_regno_fusage (rtx
, enum rtx_code
, unsigned int);
1586 extern int pure_call_p (rtx
);
1587 extern void remove_note (rtx
, rtx
);
1588 extern int side_effects_p (rtx
);
1589 extern int volatile_refs_p (rtx
);
1590 extern int volatile_insn_p (rtx
);
1591 extern int may_trap_p (rtx
);
1592 extern int inequality_comparisons_p (rtx
);
1593 extern rtx
replace_rtx (rtx
, rtx
, rtx
);
1594 extern rtx
replace_regs (rtx
, rtx
*, unsigned int, int);
1595 extern int replace_label (rtx
*, void *);
1596 extern int rtx_referenced_p (rtx
, rtx
);
1597 extern bool tablejump_p (rtx
, rtx
*, rtx
*);
1598 extern int computed_jump_p (rtx
);
1599 typedef int (*rtx_function
) (rtx
*, void *);
1600 extern int for_each_rtx (rtx
*, rtx_function
, void *);
1601 extern rtx
regno_use_in (unsigned int, rtx
);
1602 extern int auto_inc_p (rtx
);
1603 extern int in_expr_list_p (rtx
, rtx
);
1604 extern void remove_node_from_expr_list (rtx
, rtx
*);
1605 extern int insns_safe_to_move_p (rtx
, rtx
, rtx
*);
1606 extern int loc_mentioned_in_p (rtx
*, rtx
);
1607 extern rtx
find_first_parameter_load (rtx
, rtx
);
1608 extern bool keep_with_call_p (rtx
);
1609 extern bool label_is_jump_target_p (rtx
, rtx
);
1610 extern int insn_rtx_cost (rtx
);
1612 /* Given an insn and condition, return a canonical description of
1613 the test being made. */
1614 extern rtx
canonicalize_condition (rtx
, rtx
, int, rtx
*, rtx
, int, int);
1616 /* Given a JUMP_INSN, return a canonical description of the test
1618 extern rtx
get_condition (rtx
, rtx
*, int, int);
1623 extern rtx
find_use_as_address (rtx
, rtx
, HOST_WIDE_INT
);
1627 void free_EXPR_LIST_list (rtx
*);
1628 void free_INSN_LIST_list (rtx
*);
1629 void free_EXPR_LIST_node (rtx
);
1630 void free_INSN_LIST_node (rtx
);
1631 rtx
alloc_INSN_LIST (rtx
, rtx
);
1632 rtx
alloc_EXPR_LIST (int, rtx
, rtx
);
1636 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1637 Always at least 3, since the combiner could put that many together
1638 and we want this to remain correct for all the remaining passes. */
1640 extern int max_parallel
;
1642 /* Free up register info memory. */
1643 extern void free_reg_info (void);
1646 extern int asm_noperands (rtx
);
1647 extern const char *decode_asm_operands (rtx
, rtx
*, rtx
**, const char **,
1648 enum machine_mode
*);
1650 extern enum reg_class
reg_preferred_class (int);
1651 extern enum reg_class
reg_alternate_class (int);
1653 extern void split_all_insns (int);
1654 extern void split_all_insns_noflow (void);
1656 #define MAX_SAVED_CONST_INT 64
1657 extern GTY(()) rtx const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1659 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1660 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1661 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1662 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1663 extern GTY(()) rtx const_true_rtx
;
1665 extern GTY(()) rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1667 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1668 same as VOIDmode. */
1670 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1672 /* Likewise, for the constants 1 and 2. */
1674 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1675 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1677 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1678 is used to represent the frame pointer. This is because the
1679 hard frame pointer and the automatic variables are separated by an amount
1680 that cannot be determined until after register allocation. We can assume
1681 that in this case ELIMINABLE_REGS will be defined, one action of which
1682 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1683 #ifndef HARD_FRAME_POINTER_REGNUM
1684 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1687 /* Index labels for global_rtl. */
1688 enum global_rtl_index
1694 /* For register elimination to work properly these hard_frame_pointer_rtx,
1695 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1696 the same register. */
1697 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1698 GR_ARG_POINTER
= GR_FRAME_POINTER
,
1700 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1701 GR_HARD_FRAME_POINTER
= GR_FRAME_POINTER
,
1703 GR_HARD_FRAME_POINTER
,
1705 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1706 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1707 GR_ARG_POINTER
= GR_HARD_FRAME_POINTER
,
1712 GR_VIRTUAL_INCOMING_ARGS
,
1713 GR_VIRTUAL_STACK_ARGS
,
1714 GR_VIRTUAL_STACK_DYNAMIC
,
1715 GR_VIRTUAL_OUTGOING_ARGS
,
1721 /* Pointers to standard pieces of rtx are stored here. */
1722 extern GTY(()) rtx global_rtl
[GR_MAX
];
1724 /* Standard pieces of rtx, to be substituted directly into things. */
1725 #define pc_rtx (global_rtl[GR_PC])
1726 #define cc0_rtx (global_rtl[GR_CC0])
1728 /* All references to certain hard regs, except those created
1729 by allocating pseudo regs into them (when that's possible),
1730 go through these unique rtx objects. */
1731 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1732 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1733 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1734 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1736 extern GTY(()) rtx pic_offset_table_rtx
;
1737 extern GTY(()) rtx static_chain_rtx
;
1738 extern GTY(()) rtx static_chain_incoming_rtx
;
1739 extern GTY(()) rtx return_address_pointer_rtx
;
1741 /* Include the RTL generation functions. */
1743 #ifndef GENERATOR_FILE
1745 #ifndef USE_MAPPED_LOCATION
1746 #undef gen_rtx_ASM_OPERANDS
1747 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1748 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1752 /* There are some RTL codes that require special attention; the
1753 generation functions included above do the raw handling. If you
1754 add to this list, modify special_rtx in gengenrtl.c as well. */
1756 extern rtx
gen_rtx_CONST_INT (enum machine_mode
, HOST_WIDE_INT
);
1757 extern rtx
gen_rtx_CONST_VECTOR (enum machine_mode
, rtvec
);
1758 extern rtx
gen_raw_REG (enum machine_mode
, int);
1759 extern rtx
gen_rtx_REG (enum machine_mode
, unsigned);
1760 extern rtx
gen_rtx_SUBREG (enum machine_mode
, rtx
, int);
1761 extern rtx
gen_rtx_MEM (enum machine_mode
, rtx
);
1763 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1765 /* Virtual registers are used during RTL generation to refer to locations into
1766 the stack frame when the actual location isn't known until RTL generation
1767 is complete. The routine instantiate_virtual_regs replaces these with
1768 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1771 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1773 /* This points to the first word of the incoming arguments passed on the stack,
1774 either by the caller or by the callee when pretending it was passed by the
1777 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1779 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1781 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1782 variable on the stack. Otherwise, it points to the first variable on
1785 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1787 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1789 /* This points to the location of dynamically-allocated memory on the stack
1790 immediately after the stack pointer has been adjusted by the amount
1793 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1795 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1797 /* This points to the location in the stack at which outgoing arguments should
1798 be written when the stack is pre-pushed (arguments pushed using push
1799 insns always use sp). */
1801 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1803 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1805 /* This points to the Canonical Frame Address of the function. This
1806 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1807 but is calculated relative to the arg pointer for simplicity; the
1808 frame pointer nor stack pointer are necessarily fixed relative to
1809 the CFA until after reload. */
1811 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1813 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1815 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1817 /* Nonzero if REGNUM is a pointer into the stack frame. */
1818 #define REGNO_PTR_FRAME_P(REGNUM) \
1819 ((REGNUM) == STACK_POINTER_REGNUM \
1820 || (REGNUM) == FRAME_POINTER_REGNUM \
1821 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1822 || (REGNUM) == ARG_POINTER_REGNUM \
1823 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1824 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1826 /* REGNUM never really appearing in the INSN stream. */
1827 #define INVALID_REGNUM (~(unsigned int) 0)
1829 extern rtx
output_constant_def (tree
, int);
1830 extern rtx
lookup_constant_def (tree
);
1832 /* Nonzero after the second flow pass has completed.
1833 Set to 1 or 0 by toplev.c */
1834 extern int flow2_completed
;
1836 /* Nonzero after end of reload pass.
1837 Set to 1 or 0 by reload1.c. */
1839 extern int reload_completed
;
1841 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1842 extern int epilogue_completed
;
1844 /* Set to 1 while reload_as_needed is operating.
1845 Required by some machines to handle any generated moves differently. */
1847 extern int reload_in_progress
;
1849 /* If this is nonzero, we do not bother generating VOLATILE
1850 around volatile memory references, and we are willing to
1851 output indirect addresses. If cse is to follow, we reject
1852 indirect addresses so a useful potential cse is generated;
1853 if it is used only once, instruction combination will produce
1854 the same indirect address eventually. */
1855 extern int cse_not_expected
;
1857 /* Set to nonzero before life analysis to indicate that it is unsafe to
1858 generate any new pseudo registers. */
1859 extern int no_new_pseudos
;
1861 /* Translates rtx code to tree code, for those codes needed by
1862 REAL_ARITHMETIC. The function returns an int because the caller may not
1863 know what `enum tree_code' means. */
1865 extern int rtx_to_tree_code (enum rtx_code
);
1868 extern int delete_trivially_dead_insns (rtx
, int);
1869 extern int cse_main (rtx
, int, FILE *);
1870 extern void cse_condition_code_reg (void);
1871 extern int exp_equiv_p (rtx
, rtx
, int, bool);
1872 extern unsigned hash_rtx (rtx x
, enum machine_mode
, int *, int *, bool);
1875 extern int comparison_dominates_p (enum rtx_code
, enum rtx_code
);
1876 extern int condjump_p (rtx
);
1877 extern int any_condjump_p (rtx
);
1878 extern int any_uncondjump_p (rtx
);
1879 extern rtx
pc_set (rtx
);
1880 extern rtx
condjump_label (rtx
);
1881 extern int simplejump_p (rtx
);
1882 extern int returnjump_p (rtx
);
1883 extern int onlyjump_p (rtx
);
1884 extern int only_sets_cc0_p (rtx
);
1885 extern int sets_cc0_p (rtx
);
1886 extern int invert_jump_1 (rtx
, rtx
);
1887 extern int invert_jump (rtx
, rtx
, int);
1888 extern int rtx_renumbered_equal_p (rtx
, rtx
);
1889 extern int true_regnum (rtx
);
1890 extern unsigned int reg_or_subregno (rtx
);
1891 extern int redirect_jump_1 (rtx
, rtx
);
1892 extern void redirect_jump_2 (rtx
, rtx
, rtx
, int, int);
1893 extern int redirect_jump (rtx
, rtx
, int);
1894 extern void rebuild_jump_labels (rtx
);
1895 extern rtx
reversed_comparison (rtx
, enum machine_mode
);
1896 extern enum rtx_code
reversed_comparison_code (rtx
, rtx
);
1897 extern enum rtx_code
reversed_comparison_code_parts (enum rtx_code
,
1899 extern void delete_for_peephole (rtx
, rtx
);
1900 extern int condjump_in_parallel_p (rtx
);
1901 extern void purge_line_number_notes (rtx
);
1903 /* In emit-rtl.c. */
1904 extern int max_reg_num (void);
1905 extern int max_label_num (void);
1906 extern int get_first_label_num (void);
1907 extern void maybe_set_first_label_num (rtx
);
1908 extern void delete_insns_since (rtx
);
1909 extern void mark_reg_pointer (rtx
, int);
1910 extern void mark_user_reg (rtx
);
1911 extern void reset_used_flags (rtx
);
1912 extern void set_used_flags (rtx
);
1913 extern void reorder_insns (rtx
, rtx
, rtx
);
1914 extern void reorder_insns_nobb (rtx
, rtx
, rtx
);
1915 extern int get_max_uid (void);
1916 extern int in_sequence_p (void);
1917 extern void force_next_line_note (void);
1918 extern void init_emit (void);
1919 extern void init_emit_once (int);
1920 extern void push_topmost_sequence (void);
1921 extern void pop_topmost_sequence (void);
1922 extern void set_new_first_and_last_insn (rtx
, rtx
);
1923 extern void unshare_all_rtl (void);
1924 extern void unshare_all_rtl_again (rtx
);
1925 extern void unshare_all_rtl_in_chain (rtx
);
1926 extern void verify_rtl_sharing (void);
1927 extern void set_first_insn (rtx
);
1928 extern void set_last_insn (rtx
);
1929 extern void link_cc0_insns (rtx
);
1930 extern void add_insn (rtx
);
1931 extern void add_insn_before (rtx
, rtx
);
1932 extern void add_insn_after (rtx
, rtx
);
1933 extern void remove_insn (rtx
);
1934 extern void emit_insn_after_with_line_notes (rtx
, rtx
, rtx
);
1935 extern rtx
emit (rtx
);
1936 extern void renumber_insns (FILE *);
1937 extern void remove_unnecessary_notes (void);
1938 extern rtx
delete_insn (rtx
);
1939 extern rtx
entry_of_function (void);
1940 extern void delete_insn_chain (rtx
, rtx
);
1941 extern rtx
unlink_insn_chain (rtx
, rtx
);
1942 extern rtx
delete_insn_and_edges (rtx
);
1943 extern void delete_insn_chain_and_edges (rtx
, rtx
);
1944 extern rtx
gen_lowpart_SUBREG (enum machine_mode
, rtx
);
1945 extern rtx
gen_const_mem (enum machine_mode
, rtx
);
1946 extern bool validate_subreg (enum machine_mode
, enum machine_mode
,
1950 extern int combine_instructions (rtx
, unsigned int);
1951 extern unsigned int extended_count (rtx
, enum machine_mode
, int);
1952 extern rtx
remove_death (unsigned int, rtx
);
1953 extern void dump_combine_stats (FILE *);
1954 extern void dump_combine_total_stats (FILE *);
1956 extern void web_main (void);
1958 /* In sched-rgn.c. */
1959 extern void schedule_insns (FILE *);
1961 /* In sched-ebb.c. */
1962 extern void schedule_ebbs (FILE *);
1964 /* In haifa-sched.c. */
1965 extern void fix_sched_param (const char *, const char *);
1967 /* In print-rtl.c */
1968 extern const char *print_rtx_head
;
1969 extern void debug_rtx (rtx
);
1970 extern void debug_rtx_list (rtx
, int);
1971 extern void debug_rtx_range (rtx
, rtx
);
1972 extern rtx
debug_rtx_find (rtx
, int);
1973 extern void print_mem_expr (FILE *, tree
);
1974 extern void print_rtl (FILE *, rtx
);
1975 extern void print_simple_rtl (FILE *, rtx
);
1976 extern int print_rtl_single (FILE *, rtx
);
1977 extern void print_inline_rtx (FILE *, rtx
, int);
1980 extern void init_loop (void);
1981 extern void loop_optimize (rtx
, FILE *, int);
1984 extern void branch_target_load_optimize (bool);
1987 extern void reposition_prologue_and_epilogue_notes (rtx
);
1988 extern void thread_prologue_and_epilogue_insns (rtx
);
1989 extern int prologue_epilogue_contains (rtx
);
1990 extern int sibcall_epilogue_contains (rtx
);
1991 extern void mark_temp_addr_taken (rtx
);
1992 extern void update_temp_slot_address (rtx
, rtx
);
1995 extern void expand_null_return (void);
1996 extern void expand_naked_return (void);
1997 extern void emit_jump (rtx
);
2000 extern rtx
move_by_pieces (rtx
, rtx
, unsigned HOST_WIDE_INT
,
2004 extern void recompute_reg_usage (void);
2005 extern int initialize_uninitialized_subregs (void);
2006 extern void delete_dead_jumptables (void);
2007 extern void print_rtl_with_bb (FILE *, rtx
);
2008 extern void dump_flow_info (FILE *);
2011 extern void init_expmed (void);
2012 extern void expand_inc (rtx
, rtx
);
2013 extern void expand_dec (rtx
, rtx
);
2016 extern bool can_copy_p (enum machine_mode
);
2017 extern rtx
fis_get_condition (rtx
);
2018 extern int gcse_main (rtx
, FILE *);
2019 extern int bypass_jumps (FILE *);
2021 /* In postreload-gcse.c */
2022 extern void gcse_after_reload_main (rtx
);
2025 extern void mark_elimination (int, int);
2026 extern int global_alloc (FILE *);
2027 extern void dump_global_regs (FILE *);
2029 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2030 extern void retry_global_alloc (int, HARD_REG_SET
);
2032 extern void build_insn_chain (rtx
);
2035 extern int reg_classes_intersect_p (enum reg_class
, enum reg_class
);
2036 extern int reg_class_subset_p (enum reg_class
, enum reg_class
);
2037 extern void globalize_reg (int);
2038 extern void init_reg_modes_once (void);
2039 extern void init_regs (void);
2040 extern void init_fake_stack_mems (void);
2041 extern void init_reg_sets (void);
2042 extern void regclass_init (void);
2043 extern void regclass (rtx
, int, FILE *);
2044 extern void reg_scan (rtx
, unsigned int);
2045 extern void reg_scan_update (rtx
, rtx
, unsigned int);
2046 extern void fix_register (const char *, int, int);
2047 extern void init_subregs_of_mode (void);
2048 extern void record_subregs_of_mode (rtx
);
2050 extern void cannot_change_mode_set_regs (HARD_REG_SET
*,
2051 enum machine_mode
, unsigned int);
2053 extern bool invalid_mode_change_p (unsigned int, enum reg_class
,
2057 extern void regmove_optimize (rtx
, int, FILE *);
2058 extern void combine_stack_adjustments (void);
2061 extern void dbr_schedule (rtx
, FILE *);
2063 /* In local-alloc.c */
2064 extern void dump_local_alloc (FILE *);
2065 extern int local_alloc (void);
2068 extern int function_invariant_p (rtx
);
2070 /* In reg-stack.c */
2071 extern bool reg_to_stack (FILE *);
2079 LCT_CONST_MAKE_BLOCK
= 3,
2080 LCT_PURE_MAKE_BLOCK
= 4,
2083 LCT_RETURNS_TWICE
= 7
2086 extern void emit_library_call (rtx
, enum libcall_type
, enum machine_mode
, int,
2088 extern rtx
emit_library_call_value (rtx
, rtx
, enum libcall_type
,
2089 enum machine_mode
, int, ...);
2092 extern int in_data_section (void);
2093 extern void init_varasm_once (void);
2096 extern void traverse_md_constants (int (*) (void **, void *), void *);
2097 struct md_constant
{ char *name
, *value
; };
2100 extern int read_skip_spaces (FILE *);
2101 extern bool read_rtx (FILE *, rtx
*, int *);
2102 extern void copy_rtx_ptr_loc (const void *, const void *);
2103 extern void print_rtx_ptr_loc (const void *);
2104 extern const char *join_c_conditions (const char *, const char *);
2105 extern void print_c_condition (const char *);
2106 extern const char *read_rtx_filename
;
2107 extern int read_rtx_lineno
;
2110 extern void clear_reg_alias_info (rtx
);
2111 extern rtx
canon_rtx (rtx
);
2112 extern int true_dependence (rtx
, enum machine_mode
, rtx
, int (*)(rtx
, int));
2113 extern rtx
get_addr (rtx
);
2114 extern int canon_true_dependence (rtx
, enum machine_mode
, rtx
, rtx
,
2116 extern int read_dependence (rtx
, rtx
);
2117 extern int anti_dependence (rtx
, rtx
);
2118 extern int output_dependence (rtx
, rtx
);
2119 extern void mark_constant_function (void);
2120 extern void init_alias_once (void);
2121 extern void init_alias_analysis (void);
2122 extern void end_alias_analysis (void);
2123 extern bool memory_modified_in_insn_p (rtx
, rtx
);
2124 extern rtx
find_base_term (rtx
);
2125 extern rtx
gen_hard_reg_clobber (enum machine_mode
, unsigned int);
2126 extern rtx
get_reg_known_value (unsigned int);
2127 extern bool get_reg_known_equiv_p (unsigned int);
2130 extern int stack_regs_mentioned (rtx insn
);
2134 extern GTY(()) rtx stack_limit_rtx
;
2136 /* In regrename.c */
2137 extern void regrename_optimize (void);
2138 extern void copyprop_hardreg_forward (void);
2141 extern void if_convert (int);
2144 extern void invert_br_probabilities (rtx
);
2145 extern bool expensive_function_p (int);
2147 extern void tracer (unsigned int);
2149 /* In var-tracking.c */
2150 extern void variable_tracking_main (void);
2152 /* In stor-layout.c. */
2153 extern void get_mode_bounds (enum machine_mode
, int, enum machine_mode
,
2156 /* In loop-unswitch.c */
2157 extern rtx
reversed_condition (rtx
);
2158 extern rtx
compare_and_jump_seq (rtx
, rtx
, enum rtx_code
, rtx
, int, rtx
);
2161 extern rtx
canon_condition (rtx
);
2162 extern void simplify_using_condition (rtx
, rtx
*, struct bitmap_head_def
*);
2165 extern void reg_alloc (void);
2167 /* In modulo-sched.c. */
2168 extern void sms_schedule (FILE *);
2172 rtx (*gen_lowpart
) (enum machine_mode
, rtx
);
2173 rtx (*gen_lowpart_no_emit
) (enum machine_mode
, rtx
);
2174 rtx (*reg_nonzero_bits
) (rtx
, enum machine_mode
, rtx
, enum machine_mode
,
2175 unsigned HOST_WIDE_INT
, unsigned HOST_WIDE_INT
*);
2176 rtx (*reg_num_sign_bit_copies
) (rtx
, enum machine_mode
, rtx
, enum machine_mode
,
2177 unsigned int, unsigned int *);
2179 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2182 /* Each pass can provide its own. */
2183 extern struct rtl_hooks rtl_hooks
;
2185 /* ... but then it has to restore these. */
2186 extern const struct rtl_hooks general_rtl_hooks
;
2188 /* Keep this for the nonce. */
2189 #define gen_lowpart rtl_hooks.gen_lowpart
2191 #endif /* ! GCC_RTL_H */