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 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
24 #include "statistics.h"
31 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
32 #undef FLOAT /* Likewise. */
33 #undef ABS /* Likewise. */
34 #undef PC /* Likewise. */
36 /* Value used by some passes to "recognize" noop moves as valid
38 #define NOOP_MOVE_INSN_CODE INT_MAX
40 /* Register Transfer Language EXPRESSIONS CODES */
42 #define RTX_CODE enum rtx_code
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
46 #include "rtl.def" /* rtl expressions are documented here */
49 LAST_AND_UNUSED_RTX_CODE
}; /* A convenient way to get a value for
51 Assumes default enum value assignment. */
53 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
54 /* The cast here, saves many elsewhere. */
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)
95 #define RTX_EXPR_FIRST (RTX_COMPARE)
96 #define RTX_EXPR_LAST (RTX_UNARY)
98 extern const unsigned char rtx_length
[NUM_RTX_CODE
];
99 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
101 extern const char * const rtx_name
[NUM_RTX_CODE
];
102 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
104 extern const char * const rtx_format
[NUM_RTX_CODE
];
105 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
107 extern const enum rtx_class rtx_class
[NUM_RTX_CODE
];
108 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
110 extern const unsigned char rtx_size
[NUM_RTX_CODE
];
111 extern const unsigned char rtx_next
[NUM_RTX_CODE
];
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. */
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align
: 8;
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
127 unsigned max_after_base
: 1; /* maximum address target label is
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned
: 1; /* offsets have to be treated as unsigned. */
133 } addr_diff_vec_flags
;
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. If any element is nonzero, it means
138 the value of the corresponding attribute is unknown. */
139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
140 while EXPR can describe a larger underlying object, which might have a
141 stricter alignment; OFFSET is the offset of the MEM within that object. */
142 typedef struct mem_attrs
GTY(())
144 HOST_WIDE_INT alias
; /* Memory alias set. */
145 tree expr
; /* expr corresponding to MEM. */
146 rtx offset
; /* Offset from start of DECL, as CONST_INT. */
147 rtx size
; /* Size in bytes, as a CONST_INT. */
148 unsigned int align
; /* Alignment of MEM in bits. */
151 /* Structure used to describe the attributes of a REG in similar way as
152 mem_attrs does for MEM above. */
154 typedef struct reg_attrs
GTY(())
156 tree decl
; /* decl corresponding to REG. */
157 HOST_WIDE_INT offset
; /* Offset from start of DECL. */
160 /* Common union for an element of an rtx. */
169 enum machine_mode rttype
;
170 addr_diff_vec_flags rt_addr_diff_vec_flags
;
171 struct cselib_val_struct
*rt_cselib
;
172 struct bitmap_head_def
*rtbit
;
174 struct basic_block_def
*bb
;
178 typedef union rtunion_def rtunion
;
180 /* RTL expression ("rtx"). */
182 struct rtx_def
GTY((chain_next ("RTX_NEXT (&%h)"),
183 chain_prev ("RTX_PREV (&%h)")))
185 /* The kind of expression this is. */
186 ENUM_BITFIELD(rtx_code
) code
: 16;
188 /* The kind of value the expression has. */
189 ENUM_BITFIELD(machine_mode
) mode
: 8;
191 /* 1 in a MEM if we should keep the alias set for this mem unchanged
192 when we access a component.
193 1 in a CALL_INSN if it is a sibling call.
194 1 in a SET that is for a return.
195 In a CODE_LABEL, part of the two-bit alternate entry field. */
196 unsigned int jump
: 1;
197 /* In a CODE_LABEL, part of the two-bit alternate entry field.
198 1 in a MEM if it cannot trap. */
199 unsigned int call
: 1;
200 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
201 1 in a SUBREG if it references an unsigned object whose mode has been
202 from a promoted to a wider mode.
203 1 in a SYMBOL_REF if it addresses something in the per-function
205 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
206 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
207 unsigned int unchanging
: 1;
208 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
209 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
210 if it has been deleted.
211 1 in a REG expression if corresponds to a variable declared by the user,
212 0 for an internally generated temporary.
213 1 in a SUBREG with a negative value.
214 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
215 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
216 unsigned int volatil
: 1;
217 /* 1 in a MEM referring to a field of an aggregate.
218 0 if the MEM was a variable or the result of a * operator in C;
219 1 if it was the result of a . or -> operator (on a struct) in C.
220 1 in a REG if the register is used only in exit code a loop.
221 1 in a SUBREG expression if was generated from a variable with a
223 1 in a CODE_LABEL if the label is used for nonlocal gotos
224 and must not be deleted even if its count is zero.
225 1 in a LABEL_REF if this is a reference to a label outside the
227 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
228 together with the preceding insn. Valid only within sched.
229 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
230 from the target of a branch. Valid from reorg until end of compilation;
232 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
233 dead code. Valid only during dead-code elimination phase; cleared
235 unsigned int in_struct
: 1;
236 /* At the end of RTL generation, 1 if this rtx is used. This is used for
237 copying shared structure. See `unshare_all_rtl'.
238 In a REG, this is not needed for that purpose, and used instead
239 in `leaf_renumber_regs_insn'.
240 1 in a SYMBOL_REF, means that emit_library_call
241 has used it as the function. */
242 unsigned int used
: 1;
243 /* 1 in an INSN or a SET if this rtx is related to the call frame,
244 either changing how we compute the frame address or saving and
245 restoring registers in the prologue and epilogue.
246 1 in a REG or MEM if it is a pointer.
247 1 in a SYMBOL_REF if it addresses something in the per-function
248 constant string pool. */
249 unsigned frame_related
: 1;
250 /* 1 in a REG or PARALLEL that is the current function's return value.
251 1 in a MEM if it refers to a scalar.
252 1 in a SYMBOL_REF for a weak symbol. */
253 unsigned return_val
: 1;
255 /* The first element of the operands of this rtx.
256 The number of operands and their types are controlled
257 by the `code' field, according to rtl.def. */
260 HOST_WIDE_INT hwint
[1];
261 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u
;
264 /* The size in bytes of an rtx header (code, mode and flags). */
265 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
267 /* The size in bytes of an rtx with code CODE. */
268 #define RTX_SIZE(CODE) rtx_size[CODE]
270 #define NULL_RTX (rtx) 0
272 /* The "next" and "previous" RTX, relative to this one. */
274 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
275 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
277 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
279 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
280 || GET_CODE (X) == CALL_INSN \
281 || GET_CODE (X) == JUMP_INSN \
282 || GET_CODE (X) == NOTE \
283 || GET_CODE (X) == BARRIER \
284 || GET_CODE (X) == CODE_LABEL) \
285 && PREV_INSN (X) != NULL \
286 && NEXT_INSN (PREV_INSN (X)) == X \
287 ? PREV_INSN (X) : NULL)
289 /* Define macros to access the `code' field of the rtx. */
291 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
292 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
294 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
295 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
297 /* RTL vector. These appear inside RTX's when there is a need
298 for a variable number of things. The principle use is inside
299 PARALLEL expressions. */
301 struct rtvec_def
GTY(()) {
302 int num_elem
; /* number of elements */
303 rtx
GTY ((length ("%h.num_elem"))) elem
[1];
306 #define NULL_RTVEC (rtvec) 0
308 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
309 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
311 /* Predicate yielding nonzero iff X is an rtx for a register. */
312 #define REG_P(X) (GET_CODE (X) == REG)
314 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
315 #define MEM_P(X) (GET_CODE (X) == MEM)
317 /* Predicate yielding nonzero iff X is a label insn. */
318 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
320 /* Predicate yielding nonzero iff X is a jump insn. */
321 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
323 /* Predicate yielding nonzero iff X is a call insn. */
324 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
326 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
327 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
329 /* Predicate yielding nonzero iff X is a real insn. */
331 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
333 /* Predicate yielding nonzero iff X is a note insn. */
334 #define NOTE_P(X) (GET_CODE (X) == NOTE)
336 /* Predicate yielding nonzero iff X is a barrier insn. */
337 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
339 /* Predicate yielding nonzero iff X is a data for a jump table. */
340 #define JUMP_TABLE_DATA_P(INSN) \
341 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
342 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
344 /* 1 if X is a unary operator. */
347 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
349 /* 1 if X is a binary operator. */
351 #define BINARY_P(X) \
352 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
354 /* 1 if X is an arithmetic operator. */
356 #define ARITHMETIC_P(X) \
357 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
358 == RTX_ARITHMETIC_RESULT)
360 /* 1 if X is an arithmetic operator. */
362 #define COMMUTATIVE_ARITH_P(X) \
363 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
365 /* 1 if X is a commutative arithmetic operator or a comparison operator.
366 These two are sometimes selected together because it is possible to
367 swap the two operands. */
369 #define SWAPPABLE_OPERANDS_P(X) \
370 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
371 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
372 | (1 << RTX_COMPARE)))
374 /* 1 if X is a non-commutative operator. */
376 #define NON_COMMUTATIVE_P(X) \
377 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
378 == RTX_NON_COMMUTATIVE_RESULT)
380 /* 1 if X is a commutative operator on integers. */
382 #define COMMUTATIVE_P(X) \
383 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
384 == RTX_COMMUTATIVE_RESULT)
386 /* 1 if X is a relational operator. */
388 #define COMPARISON_P(X) \
389 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
391 /* 1 if X is a constant value that is an integer. */
393 #define CONSTANT_P(X) \
394 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
395 || GET_CODE (X) == CONST_VECTOR)
397 /* 1 if X can be used to represent an object. */
398 #define OBJECT_P(X) \
399 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
401 /* General accessor macros for accessing the fields of an rtx. */
403 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
404 /* The bit with a star outside the statement expr and an & inside is
405 so that N can be evaluated only once. */
406 #define RTL_CHECK1(RTX, N, C1) __extension__ \
407 (*({ rtx const _rtx = (RTX); const int _n = (N); \
408 const enum rtx_code _code = GET_CODE (_rtx); \
409 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
410 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
412 if (GET_RTX_FORMAT(_code)[_n] != C1) \
413 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
415 &_rtx->u.fld[_n]; }))
417 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
418 (*({ rtx const _rtx = (RTX); const int _n = (N); \
419 const enum rtx_code _code = GET_CODE (_rtx); \
420 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
421 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
423 if (GET_RTX_FORMAT(_code)[_n] != C1 \
424 && GET_RTX_FORMAT(_code)[_n] != C2) \
425 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
427 &_rtx->u.fld[_n]; }))
429 #define RTL_CHECKC1(RTX, N, C) __extension__ \
430 (*({ rtx const _rtx = (RTX); const int _n = (N); \
431 if (GET_CODE (_rtx) != (C)) \
432 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
434 &_rtx->u.fld[_n]; }))
436 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
437 (*({ rtx const _rtx = (RTX); const int _n = (N); \
438 const enum rtx_code _code = GET_CODE (_rtx); \
439 if (_code != (C1) && _code != (C2)) \
440 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
442 &_rtx->u.fld[_n]; }))
444 #define RTVEC_ELT(RTVEC, I) __extension__ \
445 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
446 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
447 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
449 &_rtvec->elem[_i]; }))
451 #define XWINT(RTX, N) __extension__ \
452 (*({ rtx const _rtx = (RTX); const int _n = (N); \
453 const enum rtx_code _code = GET_CODE (_rtx); \
454 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
455 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
457 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
458 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
460 &_rtx->u.hwint[_n]; }))
462 #define XCWINT(RTX, N, C) __extension__ \
463 (*({ rtx const _rtx = (RTX); \
464 if (GET_CODE (_rtx) != (C)) \
465 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
467 &_rtx->u.hwint[N]; }))
469 extern void rtl_check_failed_bounds (rtx
, int, const char *, int,
472 extern void rtl_check_failed_type1 (rtx
, int, int, const char *, int,
475 extern void rtl_check_failed_type2 (rtx
, int, int, int, const char *,
478 extern void rtl_check_failed_code1 (rtx
, enum rtx_code
, const char *,
481 extern void rtl_check_failed_code2 (rtx
, enum rtx_code
, enum rtx_code
,
482 const char *, int, const char *)
484 extern void rtvec_check_failed_bounds (rtvec
, int, const char *, int,
488 #else /* not ENABLE_RTL_CHECKING */
490 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
491 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
492 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
493 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
494 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
495 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
496 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
500 /* General accessor macros for accessing the flags of an rtx. */
502 /* Access an individual rtx flag, with no checking of any kind. */
503 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
505 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
506 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
507 ({ rtx const _rtx = (RTX); \
508 if (GET_CODE(_rtx) != C1) \
509 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
513 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
514 ({ rtx const _rtx = (RTX); \
515 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
516 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
520 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
521 ({ rtx const _rtx = (RTX); \
522 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
523 && GET_CODE(_rtx) != C3) \
524 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
528 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
529 ({ rtx const _rtx = (RTX); \
530 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
531 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
532 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
536 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
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) \
541 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
545 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
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 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
555 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
557 ({ rtx const _rtx = (RTX); \
558 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
559 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
560 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
561 && GET_CODE(_rtx) != C7) \
562 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
566 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
568 ({ rtx const _rtx = (RTX); \
569 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
570 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
571 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
572 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
573 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
577 extern void rtl_check_failed_flag (const char *, rtx
, const char *,
582 #else /* not ENABLE_RTL_FLAG_CHECKING */
584 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
585 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
586 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
587 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
588 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
589 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
590 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
591 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
594 #define CLEAR_RTX_FLAGS(RTX) \
596 rtx const _rtx = (RTX); \
599 _rtx->unchanging = 0; \
601 _rtx->in_struct = 0; \
603 _rtx->frame_related = 0; \
604 _rtx->return_val = 0; \
607 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
608 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
609 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
610 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
611 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
612 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
613 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
614 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
615 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
617 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
618 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
620 /* These are like XINT, etc. except that they expect a '0' field instead
621 of the normal type code. */
623 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
624 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
625 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
626 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
627 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
628 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
629 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
630 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
631 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
632 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
633 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
634 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
635 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
637 /* Access a '0' field with any type. */
638 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
640 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
641 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
642 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
643 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
644 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
645 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
646 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
647 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
648 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
649 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
650 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
652 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
653 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
655 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
657 /* ACCESS MACROS for particular fields of insns. */
659 /* Holds a unique number for each insn.
660 These are not necessarily sequentially increasing. */
661 #define INSN_UID(INSN) XINT (INSN, 0)
663 /* Chain insns together in sequence. */
664 #define PREV_INSN(INSN) XEXP (INSN, 1)
665 #define NEXT_INSN(INSN) XEXP (INSN, 2)
667 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
668 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
669 /* The body of an insn. */
670 #define PATTERN(INSN) XEXP (INSN, 5)
672 /* Code number of instruction, from when it was recognized.
673 -1 means this instruction has not been recognized yet. */
674 #define INSN_CODE(INSN) XINT (INSN, 6)
676 /* Set up in flow.c; empty before then.
677 Holds a chain of INSN_LIST rtx's whose first operands point at
678 previous insns with direct data-flow connections to this one.
679 That means that those insns set variables whose next use is in this insn.
680 They are always in the same basic block as this insn. */
681 #define LOG_LINKS(INSN) XEXP(INSN, 7)
683 #define RTX_UNCHANGING_P(RTX) \
684 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
685 #define RTX_FRAME_RELATED_P(RTX) \
686 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
687 JUMP_INSN, BARRIER, SET)->frame_related)
689 /* 1 if RTX is an insn that has been deleted. */
690 #define INSN_DELETED_P(RTX) \
691 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
692 CODE_LABEL, BARRIER, NOTE)->volatil)
694 /* 1 if RTX is a call to a const or pure function. */
695 #define CONST_OR_PURE_CALL_P(RTX) \
696 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
697 EXPR_LIST)->unchanging)
699 /* 1 if RTX is a call_insn for a sibling call. */
700 #define SIBLING_CALL_P(RTX) \
701 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
703 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
704 #define INSN_ANNULLED_BRANCH_P(RTX) \
705 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
707 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
708 elimination phase. */
709 #define INSN_DEAD_CODE_P(RTX) \
710 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
712 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
713 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
714 executed if the branch is taken. For annulled branches with this bit
715 clear, the insn should be executed only if the branch is not taken. */
716 #define INSN_FROM_TARGET_P(RTX) \
717 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
719 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
721 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
723 /* Holds a list of notes on what this insn does to various REGs.
724 It is a chain of EXPR_LIST rtx's, where the second operand is the
725 chain pointer and the first operand is the REG being described.
726 The mode field of the EXPR_LIST contains not a real machine mode
727 but a value from enum reg_note. */
729 #define REG_NOTES(INSN) XEXP(INSN, 8)
731 /* Don't forget to change reg_note_name in rtl.c. */
734 /* The value in REG dies in this insn (i.e., it is not needed past
735 this insn). If REG is set in this insn, the REG_DEAD note may,
736 but need not, be omitted. */
739 /* The REG is autoincremented or autodecremented. */
742 /* Describes the insn as a whole; it says that the insn sets a register
743 to a constant value or to be equivalent to a memory address. If the
744 register is spilled to the stack then the constant value should be
745 substituted for it. The contents of the REG_EQUIV is the constant
746 value or memory address, which may be different from the source of
747 the SET although it has the same value. A REG_EQUIV note may also
748 appear on an insn which copies a register parameter to a pseudo-register,
749 if there is a memory address which could be used to hold that
750 pseudo-register throughout the function. */
753 /* Like REG_EQUIV except that the destination is only momentarily equal
754 to the specified rtx. Therefore, it cannot be used for substitution;
755 but it can be used for cse. */
758 /* This insn copies the return-value of a library call out of the hard reg
759 for return values. This note is actually an INSN_LIST and it points to
760 the first insn involved in setting up arguments for the call. flow.c
761 uses this to delete the entire library call when its result is dead. */
764 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
765 and points at the one that has the REG_RETVAL. This note is also an
769 /* The register is always nonnegative during the containing loop. This is
770 used in branches so that decrement and branch instructions terminating
771 on zero can be matched. There must be an insn pattern in the md file
772 named `decrement_and_branch_until_zero' or else this will never be added
773 to any instructions. */
776 /* There is no conflict *after this insn* between the register in the note
777 and the destination of this insn. */
780 /* Identifies a register set in this insn and never used. */
783 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
784 respectively. Normally, these are required to be consecutive insns, but
785 we permit putting a cc0-setting insn in the delay slot of a branch as
786 long as only one copy of the insn exists. In that case, these notes
787 point from one to the other to allow code generation to determine what
788 any require information and to properly update CC_STATUS. These notes
790 REG_CC_SETTER
, REG_CC_USER
,
792 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
793 CODE_LABEL contained in the REG_LABEL note is used by the insn.
794 This note is an INSN_LIST. */
797 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
798 write-after-read and write-after-write dependencies respectively.
799 Data dependencies, which are the only type of LOG_LINK created by
800 flow, are represented by a 0 reg note kind. */
801 REG_DEP_ANTI
, REG_DEP_OUTPUT
,
803 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
804 It has an integer value. For jumps, it is the probability that this is a
805 taken branch. For calls, it is the probability that this call won't
809 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn
810 before that the code to profile the value is inserted. It contains
811 the results of profiling. */
814 /* Attached to a call insn; indicates that the call is malloc-like and
815 that the pointer returned cannot alias anything else. */
818 /* Used to optimize rtl generated by dynamic stack allocations for targets
819 where SETJMP_VIA_SAVE_AREA is true. */
822 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
823 CONCAT of two integer value. First specifies the branch predictor
824 that added the note, second specifies the predicted hitrate of branch
825 in the same format as REG_BR_PROB note uses. */
828 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
829 for DWARF to interpret what they imply. The attached rtx is used
830 instead of intuition. */
831 REG_FRAME_RELATED_EXPR
,
833 /* Indicates that REG holds the exception context for the function.
834 This context is shared by inline functions, so the code to acquire
835 the real exception context is delayed until after inlining. */
838 /* Indicates what exception region an INSN belongs in. This is used to
839 indicate what region to which a call may throw. REGION 0 indicates
840 that a call cannot throw at all. REGION -1 indicates that it cannot
841 throw, nor will it execute a non-local goto. */
844 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
847 /* Indicates that this insn (which is part of the prologue) computes
848 a value which might not be used later, and if so it's OK to delete
849 the insn. Normally, deleting any insn in the prologue is an error.
850 At present the parameter is unused and set to (const_int 0). */
853 /* Indicates that a call does not return. */
856 /* Indicates that an indirect jump is a non-local goto instead of a
860 /* Indicates that a jump crosses between hot and cold sections
861 in a (partitioned) assembly or .o file, and therefore should not be
862 reduced to a simpler jump by optimizations. */
865 /* This kind of note is generated at each to `setjmp',
866 and similar functions that can return twice. */
869 /* Indicate calls that always returns. */
872 /* Indicate that the memory load references a vtable. The expression
873 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
877 /* The base value for branch probability notes. */
878 #define REG_BR_PROB_BASE 10000
880 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
881 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
882 #define PUT_REG_NOTE_KIND(LINK, KIND) \
883 PUT_MODE (LINK, (enum machine_mode) (KIND))
885 /* Names for REG_NOTE's in EXPR_LIST insn's. */
887 extern const char * const reg_note_name
[];
888 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
890 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
891 USE and CLOBBER expressions.
892 USE expressions list the registers filled with arguments that
893 are passed to the function.
894 CLOBBER expressions document the registers explicitly clobbered
896 Pseudo registers can not be mentioned in this list. */
897 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
899 /* The label-number of a code-label. The assembler label
900 is made from `L' and the label-number printed in decimal.
901 Label numbers are unique in a compilation. */
902 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
904 #define LINE_NUMBER NOTE
906 /* In a NOTE that is a line number, this is a string for the file name that the
907 line is in. We use the same field to record block numbers temporarily in
908 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
909 between ints and pointers if we use a different macro for the block number.)
913 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
914 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
915 #ifdef USE_MAPPED_LOCATION
916 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
917 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
918 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
919 #define SET_INSN_DELETED(INSN) \
920 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
922 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
923 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
924 (XLOC).line = NOTE_LINE_NUMBER (INSN))
925 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
926 #define SET_INSN_DELETED(INSN) \
927 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
928 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
930 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
931 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
932 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
933 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
934 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
935 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
936 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
938 /* In a NOTE that is a line number, this is the line number.
939 Other kinds of NOTEs are identified by negative numbers here. */
940 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
942 /* Nonzero if INSN is a note marking the beginning of a basic block. */
943 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
944 (GET_CODE (INSN) == NOTE \
945 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
947 /* Algorithm and flags for prediction. */
948 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
949 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
950 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
952 /* Variable declaration and the location of a variable. */
953 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
955 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
958 /* Codes that appear in the NOTE_LINE_NUMBER field
959 for kinds of notes that are not line numbers.
961 Notice that we do not try to use zero here for any of
962 the special note codes because sometimes the source line
963 actually can be zero! This happens (for example) when we
964 are generating code for the per-translation-unit constructor
965 and destructor routines for some C++ translation unit.
967 If you should change any of the following values, or if you
968 should add a new value here, don't forget to change the
969 note_insn_name array in rtl.c. */
973 /* Keep all of these numbers negative. Adjust as needed. */
974 NOTE_INSN_BIAS
= -100,
976 /* This note is used to get rid of an insn
977 when it isn't safe to patch the insn out of the chain. */
980 /* These are used to mark the beginning and end of a lexical block.
981 See NOTE_BLOCK and reorder_blocks. */
985 /* These mark the extremes of a loop. */
989 /* Generated at the place in a loop that `continue' jumps to. */
991 /* Generated at the start of a duplicated exit test. */
994 /* Generated at the end of a conditional at the top of the loop.
995 This is used to perform a lame form of loop rotation in lieu
996 of actually understanding the loop structure. The note is
997 discarded after rotation is complete. */
998 NOTE_INSN_LOOP_END_TOP_COND
,
1000 /* This kind of note is generated at the end of the function body,
1001 just before the return insn or return label. In an optimizing
1002 compilation it is deleted by the first jump optimization, after
1003 enabling that optimizer to determine whether control can fall
1004 off the end of the function body without a return statement. */
1005 NOTE_INSN_FUNCTION_END
,
1007 /* This marks the point immediately after the last prologue insn. */
1008 NOTE_INSN_PROLOGUE_END
,
1010 /* This marks the point immediately prior to the first epilogue insn. */
1011 NOTE_INSN_EPILOGUE_BEG
,
1013 /* Generated in place of user-declared labels when they are deleted. */
1014 NOTE_INSN_DELETED_LABEL
,
1016 /* This note indicates the start of the real body of the function,
1017 i.e. the point just after all of the parms have been moved into
1018 their homes, etc. */
1019 NOTE_INSN_FUNCTION_BEG
,
1021 /* These note where exception handling regions begin and end.
1022 Uses NOTE_EH_HANDLER to identify the region in question. */
1023 NOTE_INSN_EH_REGION_BEG
,
1024 NOTE_INSN_EH_REGION_END
,
1026 /* Generated whenever a duplicate line number note is output. For example,
1027 one is output after the end of an inline function, in order to prevent
1028 the line containing the inline call from being counted twice in gcov. */
1029 NOTE_INSN_REPEATED_LINE_NUMBER
,
1031 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
1032 NOTE_INSN_BASIC_BLOCK
,
1034 /* Record the expected value of a register at a location. Uses
1035 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
1036 NOTE_INSN_EXPECTED_VALUE
,
1038 /* Record a prediction. Uses NOTE_PREDICTION. */
1039 NOTE_INSN_PREDICTION
,
1041 /* Record that the current basic block is unlikely to be executed and
1042 should be moved to the UNLIKELY_EXECUTED_TEXT_SECTION. */
1043 NOTE_INSN_UNLIKELY_EXECUTED_CODE
,
1045 /* The location of a variable. */
1046 NOTE_INSN_VAR_LOCATION
,
1051 /* Names for NOTE insn's other than line numbers. */
1053 extern const char * const note_insn_name
[NOTE_INSN_MAX
- NOTE_INSN_BIAS
];
1054 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1055 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
1057 /* The name of a label, in case it corresponds to an explicit label
1058 in the input source code. */
1059 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1061 /* In jump.c, each label contains a count of the number
1062 of LABEL_REFs that point at it, so unused labels can be deleted. */
1063 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
1065 /* Labels carry a two-bit field composed of the ->jump and ->call
1066 bits. This field indicates whether the label is an alternate
1067 entry point, and if so, what kind. */
1070 LABEL_NORMAL
= 0, /* ordinary label */
1071 LABEL_STATIC_ENTRY
, /* alternate entry point, not exported */
1072 LABEL_GLOBAL_ENTRY
, /* alternate entry point, exported */
1073 LABEL_WEAK_ENTRY
/* alternate entry point, exported as weak symbol */
1076 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1078 /* Retrieve the kind of LABEL. */
1079 #define LABEL_KIND(LABEL) __extension__ \
1080 ({ rtx const _label = (LABEL); \
1081 if (GET_CODE (_label) != CODE_LABEL) \
1082 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1084 (enum label_kind) ((_label->jump << 1) | _label->call); })
1086 /* Set the kind of LABEL. */
1087 #define SET_LABEL_KIND(LABEL, KIND) do { \
1088 rtx _label = (LABEL); \
1089 unsigned int _kind = (KIND); \
1090 if (GET_CODE (_label) != CODE_LABEL) \
1091 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1093 _label->jump = ((_kind >> 1) & 1); \
1094 _label->call = (_kind & 1); \
1099 /* Retrieve the kind of LABEL. */
1100 #define LABEL_KIND(LABEL) \
1101 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1103 /* Set the kind of LABEL. */
1104 #define SET_LABEL_KIND(LABEL, KIND) do { \
1105 rtx _label = (LABEL); \
1106 unsigned int _kind = (KIND); \
1107 _label->jump = ((_kind >> 1) & 1); \
1108 _label->call = (_kind & 1); \
1111 #endif /* rtl flag checking */
1113 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1115 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1116 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1117 be decremented and possibly the label can be deleted. */
1118 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
1120 /* Once basic blocks are found in flow.c,
1121 each CODE_LABEL starts a chain that goes through
1122 all the LABEL_REFs that jump to that label.
1123 The chain eventually winds up at the CODE_LABEL: it is circular. */
1124 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1126 /* This is the field in the LABEL_REF through which the circular chain
1127 of references to a particular label is linked.
1128 This chain is set up in flow.c. */
1130 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
1132 /* Once basic blocks are found in flow.c,
1133 Each LABEL_REF points to its containing instruction with this field. */
1135 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
1137 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
1138 the number the register originally had; for a pseudo register turned into
1139 a hard reg this will hold the old pseudo register number. */
1141 #define REGNO(RTX) XCUINT (RTX, 0, REG)
1142 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1144 /* 1 if RTX is a reg or parallel that is the current function's return
1146 #define REG_FUNCTION_VALUE_P(RTX) \
1147 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1149 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1150 #define REG_USERVAR_P(RTX) \
1151 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1153 /* 1 if RTX is a reg that holds a pointer value. */
1154 #define REG_POINTER(RTX) \
1155 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1157 /* 1 if RTX is a mem that holds a pointer value. */
1158 #define MEM_POINTER(RTX) \
1159 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1161 /* 1 if the given register REG corresponds to a hard register. */
1162 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1164 /* 1 if the given register number REG_NO corresponds to a hard register. */
1165 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1167 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1169 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1171 /* For a CONST_DOUBLE:
1172 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1173 low-order word and ..._HIGH the high-order.
1174 For a float, there is a REAL_VALUE_TYPE structure, and
1175 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1176 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1177 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1178 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1180 /* For a CONST_VECTOR, return element #n. */
1181 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1183 /* For a CONST_VECTOR, return the number of elements in a vector. */
1184 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1186 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1187 SUBREG_BYTE extracts the byte-number. */
1189 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1190 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1193 /* Return the right cost to give to an operation
1194 to make the cost of the corresponding register-to-register instruction
1195 N times that of a fast register-to-register instruction. */
1196 #define COSTS_N_INSNS(N) ((N) * 4)
1198 /* Maximum cost of an rtl expression. This value has the special meaning
1199 not to use an rtx with this cost under any circumstances. */
1200 #define MAX_COST INT_MAX
1202 extern int rtx_cost (rtx
, enum rtx_code
);
1203 extern int address_cost (rtx
, enum machine_mode
);
1204 extern unsigned int subreg_lsb (rtx
);
1205 extern unsigned int subreg_lsb_1 (enum machine_mode
, enum machine_mode
,
1207 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode
,
1208 unsigned int, enum machine_mode
);
1209 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode
,
1210 unsigned int, enum machine_mode
);
1211 extern unsigned int subreg_regno (rtx
);
1212 extern unsigned HOST_WIDE_INT
nonzero_bits (rtx
, enum machine_mode
);
1213 extern unsigned int num_sign_bit_copies (rtx
, enum machine_mode
);
1216 /* 1 if RTX is a subreg containing a reg that is already known to be
1217 sign- or zero-extended from the mode of the subreg to the mode of
1218 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1221 When used as a LHS, is means that this extension must be done
1222 when assigning to SUBREG_REG. */
1224 #define SUBREG_PROMOTED_VAR_P(RTX) \
1225 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1227 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1229 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1231 _rtx->volatil = 1; \
1233 _rtx->volatil = 0; \
1234 _rtx->unchanging = (VAL); \
1237 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1238 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1239 ? -1 : (RTX)->unchanging)
1241 /* Access various components of an ASM_OPERANDS rtx. */
1243 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1244 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1245 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1246 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1247 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1248 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1249 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1250 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1251 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1252 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1253 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1254 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1255 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1256 #ifdef USE_MAPPED_LOCATION
1257 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1259 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1260 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1263 /* 1 if RTX is a mem and we should keep the alias set for this mem
1264 unchanged when we access a component. Set to 1, or example, when we
1265 are already in a non-addressable component of an aggregate. */
1266 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1267 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1269 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1270 #define MEM_VOLATILE_P(RTX) \
1271 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1272 ASM_INPUT)->volatil)
1274 /* 1 if RTX is a mem that refers to an aggregate, either to the
1275 aggregate itself of to a field of the aggregate. If zero, RTX may
1276 or may not be such a reference. */
1277 #define MEM_IN_STRUCT_P(RTX) \
1278 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1280 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1281 not refer to a scalar. */
1282 #define MEM_SCALAR_P(RTX) \
1283 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1285 /* 1 if RTX is a mem that cannot trap. */
1286 #define MEM_NOTRAP_P(RTX) \
1287 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1289 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1290 RTX. Otherwise, vice versa. Use this macro only when you are
1291 *sure* that you know that the MEM is in a structure, or is a
1292 scalar. VAL is evaluated only once. */
1293 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1297 MEM_IN_STRUCT_P (RTX) = 1; \
1298 MEM_SCALAR_P (RTX) = 0; \
1302 MEM_IN_STRUCT_P (RTX) = 0; \
1303 MEM_SCALAR_P (RTX) = 1; \
1307 /* The memory attribute block. We provide access macros for each value
1308 in the block and provide defaults if none specified. */
1309 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1311 /* The register attribute block. We provide access macros for each value
1312 in the block and provide defaults if none specified. */
1313 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1315 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1316 set, and may alias anything. Otherwise, the MEM can only alias
1317 MEMs in a conflicting alias set. This value is set in a
1318 language-dependent manner in the front-end, and should not be
1319 altered in the back-end. These set numbers are tested with
1320 alias_sets_conflict_p. */
1321 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1323 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1324 refer to part of a DECL. It may also be a COMPONENT_REF. */
1325 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1327 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1328 RTX that is always a CONST_INT. */
1329 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1331 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1332 is always a CONST_INT. */
1333 #define MEM_SIZE(RTX) \
1334 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1335 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1338 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1339 mode as a default when STRICT_ALIGNMENT, but not if not. */
1340 #define MEM_ALIGN(RTX) \
1341 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1342 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1343 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1345 /* For a REG rtx, the decl it is known to refer to, if it is known to
1346 refer to part of a DECL. */
1347 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1349 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1350 RTX that is always a CONST_INT. */
1351 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1353 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1354 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1355 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1356 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1357 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1358 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1359 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1360 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1361 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1363 /* 1 if RTX is a label_ref to a label outside the loop containing the
1365 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1366 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1368 /* 1 if RTX is a label_ref for a nonlocal label. */
1369 /* Likewise in an expr_list for a reg_label note. */
1370 #define LABEL_REF_NONLOCAL_P(RTX) \
1371 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1372 REG_LABEL)->volatil)
1374 /* 1 if RTX is a code_label that should always be considered to be needed. */
1375 #define LABEL_PRESERVE_P(RTX) \
1376 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1378 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1379 #define REG_LOOP_TEST_P(RTX) \
1380 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1382 /* During sched, 1 if RTX is an insn that must be scheduled together
1383 with the preceding insn. */
1384 #define SCHED_GROUP_P(RTX) \
1385 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1388 /* For a SET rtx, SET_DEST is the place that is set
1389 and SET_SRC is the value it is set to. */
1390 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1391 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1392 #define SET_IS_RETURN_P(RTX) \
1393 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1395 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1396 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1397 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1399 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1400 conditionally executing the code on, COND_EXEC_CODE is the code
1401 to execute if the condition is true. */
1402 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1403 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1405 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1407 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1408 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1410 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1411 tree constant pool. This information is private to varasm.c. */
1412 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1413 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1414 (RTX), SYMBOL_REF)->frame_related)
1416 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1417 #define SYMBOL_REF_FLAG(RTX) \
1418 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1420 /* 1 if RTX is a symbol_ref that has been the library function in
1421 emit_library_call. */
1422 #define SYMBOL_REF_USED(RTX) \
1423 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1425 /* 1 if RTX is a symbol_ref for a weak symbol. */
1426 #define SYMBOL_REF_WEAK(RTX) \
1427 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1429 /* The tree (decl or constant) associated with the symbol, or null. */
1430 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1432 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1433 information derivable from the tree decl associated with this symbol.
1434 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1435 decl. In some cases this is a bug. But beyond that, it's nice to cache
1436 this information to avoid recomputing it. Finally, this allows space for
1437 the target to store more than one bit of information, as with
1439 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1441 /* These flags are common enough to be defined for all targets. They
1442 are computed by the default version of targetm.encode_section_info. */
1444 /* Set if this symbol is a function. */
1445 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1446 #define SYMBOL_REF_FUNCTION_P(RTX) \
1447 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1448 /* Set if targetm.binds_local_p is true. */
1449 #define SYMBOL_FLAG_LOCAL (1 << 1)
1450 #define SYMBOL_REF_LOCAL_P(RTX) \
1451 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1452 /* Set if targetm.in_small_data_p is true. */
1453 #define SYMBOL_FLAG_SMALL (1 << 2)
1454 #define SYMBOL_REF_SMALL_P(RTX) \
1455 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1456 /* The three-bit field at [5:3] is true for TLS variables; use
1457 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1458 #define SYMBOL_FLAG_TLS_SHIFT 3
1459 #define SYMBOL_REF_TLS_MODEL(RTX) \
1460 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1461 /* Set if this symbol is not defined in this translation unit. */
1462 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1463 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1464 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1466 /* Subsequent bits are available for the target to use. */
1467 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1468 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1470 /* Define a macro to look for REG_INC notes,
1471 but save time on machines where they never exist. */
1473 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1474 #define FIND_REG_INC_NOTE(INSN, REG) \
1475 ((REG) != NULL_RTX && REG_P ((REG)) \
1476 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1477 : find_reg_note ((INSN), REG_INC, (REG)))
1479 #define FIND_REG_INC_NOTE(INSN, REG) 0
1482 /* Indicate whether the machine has any sort of auto increment addressing.
1483 If not, we can avoid checking for REG_INC notes. */
1485 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1486 #define AUTO_INC_DEC
1489 #ifndef HAVE_PRE_INCREMENT
1490 #define HAVE_PRE_INCREMENT 0
1493 #ifndef HAVE_PRE_DECREMENT
1494 #define HAVE_PRE_DECREMENT 0
1497 #ifndef HAVE_POST_INCREMENT
1498 #define HAVE_POST_INCREMENT 0
1501 #ifndef HAVE_POST_DECREMENT
1502 #define HAVE_POST_DECREMENT 0
1505 #ifndef HAVE_POST_MODIFY_DISP
1506 #define HAVE_POST_MODIFY_DISP 0
1509 #ifndef HAVE_POST_MODIFY_REG
1510 #define HAVE_POST_MODIFY_REG 0
1513 #ifndef HAVE_PRE_MODIFY_DISP
1514 #define HAVE_PRE_MODIFY_DISP 0
1517 #ifndef HAVE_PRE_MODIFY_REG
1518 #define HAVE_PRE_MODIFY_REG 0
1522 /* Some architectures do not have complete pre/post increment/decrement
1523 instruction sets, or only move some modes efficiently. These macros
1524 allow us to tune autoincrement generation. */
1526 #ifndef USE_LOAD_POST_INCREMENT
1527 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1530 #ifndef USE_LOAD_POST_DECREMENT
1531 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1534 #ifndef USE_LOAD_PRE_INCREMENT
1535 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1538 #ifndef USE_LOAD_PRE_DECREMENT
1539 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1542 #ifndef USE_STORE_POST_INCREMENT
1543 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1546 #ifndef USE_STORE_POST_DECREMENT
1547 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1550 #ifndef USE_STORE_PRE_INCREMENT
1551 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1554 #ifndef USE_STORE_PRE_DECREMENT
1555 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1558 /* Nonzero if we need to distinguish between the return value of this function
1559 and the return value of a function called by this function. This helps
1561 This is 1 until after the rtl generation pass.
1562 ??? It appears that this is 1 only when expanding trees to RTL. */
1563 extern int rtx_equal_function_value_matters
;
1565 /* Nonzero when we are generating CONCATs. */
1566 extern int generating_concat_p
;
1568 /* Generally useful functions. */
1571 extern int ceil_log2 (unsigned HOST_WIDE_INT
);
1573 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1576 extern rtx
expand_builtin_expect_jump (tree
, rtx
, rtx
);
1577 extern void purge_builtin_constant_p (void);
1580 extern void set_stack_check_libfunc (rtx
);
1581 extern HOST_WIDE_INT
trunc_int_for_mode (HOST_WIDE_INT
, enum machine_mode
);
1582 extern rtx
plus_constant_wide (rtx
, HOST_WIDE_INT
);
1583 extern rtx
plus_constant_for_output_wide (rtx
, HOST_WIDE_INT
);
1584 extern void optimize_save_area_alloca (rtx
);
1587 extern rtvec
gen_rtvec (int, ...);
1588 extern rtx
copy_insn_1 (rtx
);
1589 extern rtx
copy_insn (rtx
);
1590 extern rtx
gen_int_mode (HOST_WIDE_INT
, enum machine_mode
);
1591 extern rtx
emit_copy_of_insn_after (rtx
, rtx
);
1592 extern void set_reg_attrs_from_mem (rtx
, rtx
);
1593 extern void set_mem_attrs_from_reg (rtx
, rtx
);
1594 extern void set_reg_attrs_for_parm (rtx
, rtx
);
1595 extern void set_reg_pointer_align (rtx
, unsigned int);
1596 extern int mem_expr_equal_p (tree
, tree
);
1599 extern rtx
rtx_alloc_stat (RTX_CODE MEM_STAT_DECL
);
1600 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1602 extern rtvec
rtvec_alloc (int);
1603 extern rtx
copy_rtx (rtx
);
1604 extern void dump_rtx_statistics (void);
1607 extern rtx
copy_rtx_if_shared (rtx
);
1610 extern rtx
copy_most_rtx (rtx
, rtx
);
1611 extern rtx
shallow_copy_rtx_stat (rtx MEM_STAT_DECL
);
1612 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1613 extern int rtx_equal_p (rtx
, rtx
);
1616 extern rtvec
gen_rtvec_v (int, rtx
*);
1617 extern rtx
gen_reg_rtx (enum machine_mode
);
1618 extern rtx
gen_rtx_REG_offset (rtx
, enum machine_mode
, unsigned int, int);
1619 extern rtx
gen_label_rtx (void);
1620 extern int subreg_hard_regno (rtx
, int);
1621 extern rtx
gen_lowpart_common (enum machine_mode
, rtx
);
1624 extern rtx
gen_lowpart_if_possible (enum machine_mode
, rtx
);
1627 extern rtx
gen_highpart (enum machine_mode
, rtx
);
1628 extern rtx
gen_highpart_mode (enum machine_mode
, enum machine_mode
, rtx
);
1629 extern rtx
gen_realpart (enum machine_mode
, rtx
);
1630 extern rtx
gen_imagpart (enum machine_mode
, rtx
);
1631 extern rtx
operand_subword (rtx
, unsigned int, int, enum machine_mode
);
1634 extern rtx
operand_subword_force (rtx
, unsigned int, enum machine_mode
);
1635 extern int subreg_lowpart_p (rtx
);
1636 extern unsigned int subreg_lowpart_offset (enum machine_mode
,
1638 extern unsigned int subreg_highpart_offset (enum machine_mode
,
1640 extern rtx
make_safe_from (rtx
, rtx
);
1641 extern rtx
convert_memory_address (enum machine_mode
, rtx
);
1642 extern rtx
get_insns (void);
1643 extern const char *get_insn_name (int);
1644 extern rtx
get_last_insn (void);
1645 extern rtx
get_last_insn_anywhere (void);
1646 extern rtx
get_first_nonnote_insn (void);
1647 extern rtx
get_last_nonnote_insn (void);
1648 extern void start_sequence (void);
1649 extern void push_to_sequence (rtx
);
1650 extern void end_sequence (void);
1651 extern void push_to_full_sequence (rtx
, rtx
);
1652 extern rtx
immed_double_const (HOST_WIDE_INT
, HOST_WIDE_INT
,
1656 extern rtx
force_const_mem (enum machine_mode
, rtx
);
1659 extern rtx
get_pool_constant (rtx
);
1660 extern rtx
get_pool_constant_mark (rtx
, bool *);
1661 extern enum machine_mode
get_pool_mode (rtx
);
1662 extern rtx
get_pool_constant_for_function (struct function
*, rtx
);
1663 extern enum machine_mode
get_pool_mode_for_function (struct function
*, rtx
);
1664 extern int get_pool_offset (rtx
);
1665 extern rtx
simplify_subtraction (rtx
);
1668 extern rtx
assign_stack_local (enum machine_mode
, HOST_WIDE_INT
, int);
1669 extern rtx
assign_stack_temp (enum machine_mode
, HOST_WIDE_INT
, int);
1670 extern rtx
assign_stack_temp_for_type (enum machine_mode
,
1671 HOST_WIDE_INT
, int, tree
);
1672 extern rtx
assign_temp (tree
, int, int, int);
1675 extern rtx
emit_insn_before (rtx
, rtx
);
1676 extern rtx
emit_insn_before_setloc (rtx
, rtx
, int);
1677 extern rtx
emit_jump_insn_before (rtx
, rtx
);
1678 extern rtx
emit_jump_insn_before_setloc (rtx
, rtx
, int);
1679 extern rtx
emit_call_insn_before (rtx
, rtx
);
1680 extern rtx
emit_call_insn_before_setloc (rtx
, rtx
, int);
1681 extern rtx
emit_barrier_before (rtx
);
1682 extern rtx
emit_label_before (rtx
, rtx
);
1683 extern rtx
emit_note_before (int, rtx
);
1684 extern rtx
emit_insn_after (rtx
, rtx
);
1685 extern rtx
emit_insn_after_setloc (rtx
, rtx
, int);
1686 extern rtx
emit_jump_insn_after (rtx
, rtx
);
1687 extern rtx
emit_jump_insn_after_setloc (rtx
, rtx
, int);
1688 extern rtx
emit_call_insn_after (rtx
, rtx
);
1689 extern rtx
emit_call_insn_after_setloc (rtx
, rtx
, int);
1690 extern rtx
emit_barrier_after (rtx
);
1691 extern rtx
emit_label_after (rtx
, rtx
);
1692 extern rtx
emit_note_after (int, rtx
);
1693 extern rtx
emit_note_copy_after (rtx
, rtx
);
1694 extern rtx
emit_insn (rtx
);
1695 extern rtx
emit_jump_insn (rtx
);
1696 extern rtx
emit_call_insn (rtx
);
1697 extern rtx
emit_label (rtx
);
1698 extern rtx
emit_barrier (void);
1699 extern rtx
emit_note (int);
1700 extern rtx
emit_note_copy (rtx
);
1701 extern rtx
emit_line_note (location_t
);
1702 extern rtx
make_insn_raw (rtx
);
1703 extern void add_function_usage_to (rtx
, rtx
);
1704 extern rtx
last_call_insn (void);
1705 extern rtx
previous_insn (rtx
);
1706 extern rtx
next_insn (rtx
);
1707 extern rtx
prev_nonnote_insn (rtx
);
1708 extern rtx
next_nonnote_insn (rtx
);
1709 extern rtx
prev_real_insn (rtx
);
1710 extern rtx
next_real_insn (rtx
);
1711 extern rtx
prev_active_insn (rtx
);
1712 extern rtx
next_active_insn (rtx
);
1713 extern int active_insn_p (rtx
);
1714 extern rtx
prev_label (rtx
);
1715 extern rtx
next_label (rtx
);
1716 extern rtx
skip_consecutive_labels (rtx
);
1717 extern rtx
next_cc0_user (rtx
);
1718 extern rtx
prev_cc0_setter (rtx
);
1720 #define emit_insn_before_sameloc(INSN, BEFORE) \
1721 emit_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1722 #define emit_jump_insn_before_sameloc(INSN, BEFORE) \
1723 emit_jump_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1724 #define emit_call_insn_before_sameloc(INSN, BEFORE) \
1725 emit_call_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1726 #define emit_insn_after_sameloc(INSN, AFTER) \
1727 emit_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1728 #define emit_jump_insn_after_sameloc(INSN, AFTER) \
1729 emit_jump_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1730 #define emit_call_insn_after_sameloc(INSN, AFTER) \
1731 emit_call_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1733 /* In cfglayout.c */
1734 extern tree
choose_inner_scope (tree
, tree
);
1735 extern int insn_line (rtx
);
1736 extern const char * insn_file (rtx
);
1737 extern int locator_line (int);
1738 extern const char * locator_file (int);
1739 extern int prologue_locator
, epilogue_locator
;
1742 extern enum rtx_code
reverse_condition (enum rtx_code
);
1743 extern enum rtx_code
reverse_condition_maybe_unordered (enum rtx_code
);
1744 extern enum rtx_code
swap_condition (enum rtx_code
);
1745 extern enum rtx_code
unsigned_condition (enum rtx_code
);
1746 extern enum rtx_code
signed_condition (enum rtx_code
);
1747 extern void mark_jump_label (rtx
, rtx
, int);
1748 extern void cleanup_barriers (void);
1751 extern bool squeeze_notes (rtx
*, rtx
*);
1752 extern rtx
delete_related_insns (rtx
);
1753 extern void delete_jump (rtx
);
1754 extern void delete_barrier (rtx
);
1755 extern rtx
get_label_before (rtx
);
1756 extern rtx
get_label_after (rtx
);
1757 extern rtx
follow_jumps (rtx
);
1760 extern rtx
*find_constant_term_loc (rtx
*);
1763 extern rtx
try_split (rtx
, rtx
, int);
1764 extern int split_branch_probability
;
1766 /* In unknown file */
1767 extern rtx
split_insns (rtx
, rtx
);
1769 /* In simplify-rtx.c */
1770 extern rtx
simplify_unary_operation (enum rtx_code
, enum machine_mode
, rtx
,
1772 extern rtx
simplify_binary_operation (enum rtx_code
, enum machine_mode
, rtx
,
1774 extern rtx
simplify_ternary_operation (enum rtx_code
, enum machine_mode
,
1775 enum machine_mode
, rtx
, rtx
, rtx
);
1776 extern rtx
simplify_const_relational_operation (enum rtx_code
,
1777 enum machine_mode
, rtx
, rtx
);
1778 extern rtx
simplify_relational_operation (enum rtx_code
, enum machine_mode
,
1779 enum machine_mode
, rtx
, rtx
);
1780 extern rtx
simplify_gen_binary (enum rtx_code
, enum machine_mode
, rtx
, rtx
);
1781 extern rtx
simplify_gen_unary (enum rtx_code
, enum machine_mode
, rtx
,
1783 extern rtx
simplify_gen_ternary (enum rtx_code
, enum machine_mode
,
1784 enum machine_mode
, rtx
, rtx
, rtx
);
1785 extern rtx
simplify_gen_relational (enum rtx_code
, enum machine_mode
,
1786 enum machine_mode
, rtx
, rtx
);
1787 extern rtx
simplify_subreg (enum machine_mode
, rtx
, enum machine_mode
,
1789 extern rtx
simplify_gen_subreg (enum machine_mode
, rtx
, enum machine_mode
,
1791 extern rtx
simplify_replace_rtx (rtx
, rtx
, rtx
);
1792 extern rtx
simplify_rtx (rtx
);
1793 extern rtx
avoid_constant_pool_reference (rtx
);
1796 extern enum machine_mode
choose_hard_reg_mode (unsigned int, unsigned int,
1800 extern rtx
set_unique_reg_note (rtx
, enum reg_note
, rtx
);
1802 /* Functions in rtlanal.c */
1804 /* Single set is implemented as macro for performance reasons. */
1805 #define single_set(I) (INSN_P (I) \
1806 ? (GET_CODE (PATTERN (I)) == SET \
1807 ? PATTERN (I) : single_set_1 (I)) \
1809 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1811 /* Structure used for passing data to REPLACE_LABEL. */
1812 typedef struct replace_label_data
1816 bool update_label_nuses
;
1817 } replace_label_data
;
1819 extern int rtx_addr_can_trap_p (rtx
);
1820 extern bool nonzero_address_p (rtx
);
1821 extern int rtx_unstable_p (rtx
);
1822 extern int rtx_varies_p (rtx
, int);
1823 extern int rtx_addr_varies_p (rtx
, int);
1824 extern HOST_WIDE_INT
get_integer_term (rtx
);
1825 extern rtx
get_related_value (rtx
);
1826 extern rtx
get_jump_table_offset (rtx
, rtx
*);
1827 extern int global_reg_mentioned_p (rtx
);
1828 extern int reg_mentioned_p (rtx
, rtx
);
1829 extern int count_occurrences (rtx
, rtx
, int);
1830 extern int reg_referenced_p (rtx
, rtx
);
1831 extern int reg_used_between_p (rtx
, rtx
, rtx
);
1832 extern int reg_referenced_between_p (rtx
, rtx
, rtx
);
1833 extern int reg_set_between_p (rtx
, rtx
, rtx
);
1834 extern int regs_set_between_p (rtx
, rtx
, rtx
);
1835 extern int commutative_operand_precedence (rtx
);
1836 extern int swap_commutative_operands_p (rtx
, rtx
);
1837 extern int modified_between_p (rtx
, rtx
, rtx
);
1838 extern int no_labels_between_p (rtx
, rtx
);
1839 extern int no_jumps_between_p (rtx
, rtx
);
1840 extern int modified_in_p (rtx
, rtx
);
1841 extern int insn_dependent_p (rtx
, rtx
);
1842 extern int reg_set_p (rtx
, rtx
);
1843 extern rtx
single_set_2 (rtx
, rtx
);
1844 extern int multiple_sets (rtx
);
1845 extern int set_noop_p (rtx
);
1846 extern int noop_move_p (rtx
);
1847 extern rtx
find_last_value (rtx
, rtx
*, rtx
, int);
1848 extern int refers_to_regno_p (unsigned int, unsigned int, rtx
, rtx
*);
1849 extern int reg_overlap_mentioned_p (rtx
, rtx
);
1850 extern rtx
set_of (rtx
, rtx
);
1851 extern void note_stores (rtx
, void (*) (rtx
, rtx
, void *), void *);
1852 extern void note_uses (rtx
*, void (*) (rtx
*, void *), void *);
1853 extern int dead_or_set_p (rtx
, rtx
);
1854 extern int dead_or_set_regno_p (rtx
, unsigned int);
1855 extern rtx
find_reg_note (rtx
, enum reg_note
, rtx
);
1856 extern rtx
find_regno_note (rtx
, enum reg_note
, unsigned int);
1857 extern rtx
find_reg_equal_equiv_note (rtx
);
1858 extern int find_reg_fusage (rtx
, enum rtx_code
, rtx
);
1859 extern int find_regno_fusage (rtx
, enum rtx_code
, unsigned int);
1860 extern int pure_call_p (rtx
);
1861 extern void remove_note (rtx
, rtx
);
1862 extern int side_effects_p (rtx
);
1863 extern int volatile_refs_p (rtx
);
1864 extern int volatile_insn_p (rtx
);
1865 extern int may_trap_p (rtx
);
1866 extern int inequality_comparisons_p (rtx
);
1867 extern rtx
replace_rtx (rtx
, rtx
, rtx
);
1868 extern rtx
replace_regs (rtx
, rtx
*, unsigned int, int);
1869 extern int replace_label (rtx
*, void *);
1870 extern int rtx_referenced_p (rtx
, rtx
);
1871 extern bool tablejump_p (rtx
, rtx
*, rtx
*);
1872 extern int computed_jump_p (rtx
);
1873 typedef int (*rtx_function
) (rtx
*, void *);
1874 extern int for_each_rtx (rtx
*, rtx_function
, void *);
1875 extern rtx
regno_use_in (unsigned int, rtx
);
1876 extern int auto_inc_p (rtx
);
1877 extern int in_expr_list_p (rtx
, rtx
);
1878 extern void remove_node_from_expr_list (rtx
, rtx
*);
1879 extern int insns_safe_to_move_p (rtx
, rtx
, rtx
*);
1880 extern int loc_mentioned_in_p (rtx
*, rtx
);
1881 extern rtx
find_first_parameter_load (rtx
, rtx
);
1882 extern bool keep_with_call_p (rtx
);
1883 extern bool label_is_jump_target_p (rtx
, rtx
);
1887 extern rtx
find_use_as_address (rtx
, rtx
, HOST_WIDE_INT
);
1891 void free_EXPR_LIST_list (rtx
*);
1892 void free_INSN_LIST_list (rtx
*);
1893 void free_EXPR_LIST_node (rtx
);
1894 void free_INSN_LIST_node (rtx
);
1895 rtx
alloc_INSN_LIST (rtx
, rtx
);
1896 rtx
alloc_EXPR_LIST (int, rtx
, rtx
);
1900 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1901 Always at least 3, since the combiner could put that many together
1902 and we want this to remain correct for all the remaining passes. */
1904 extern int max_parallel
;
1906 /* Free up register info memory. */
1907 extern void free_reg_info (void);
1910 extern int asm_noperands (rtx
);
1911 extern const char *decode_asm_operands (rtx
, rtx
*, rtx
**, const char **,
1912 enum machine_mode
*);
1914 extern enum reg_class
reg_preferred_class (int);
1915 extern enum reg_class
reg_alternate_class (int);
1917 extern void split_all_insns (int);
1918 extern void split_all_insns_noflow (void);
1920 #define MAX_SAVED_CONST_INT 64
1921 extern GTY(()) rtx const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1923 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1924 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1925 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1926 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1927 extern GTY(()) rtx const_true_rtx
;
1929 extern GTY(()) rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1931 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1932 same as VOIDmode. */
1934 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1936 /* Likewise, for the constants 1 and 2. */
1938 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1939 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1941 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1942 is used to represent the frame pointer. This is because the
1943 hard frame pointer and the automatic variables are separated by an amount
1944 that cannot be determined until after register allocation. We can assume
1945 that in this case ELIMINABLE_REGS will be defined, one action of which
1946 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1947 #ifndef HARD_FRAME_POINTER_REGNUM
1948 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1951 /* Index labels for global_rtl. */
1952 enum global_rtl_index
1958 /* For register elimination to work properly these hard_frame_pointer_rtx,
1959 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1960 the same register. */
1961 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1962 GR_ARG_POINTER
= GR_FRAME_POINTER
,
1964 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1965 GR_HARD_FRAME_POINTER
= GR_FRAME_POINTER
,
1967 GR_HARD_FRAME_POINTER
,
1969 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1970 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1971 GR_ARG_POINTER
= GR_HARD_FRAME_POINTER
,
1976 GR_VIRTUAL_INCOMING_ARGS
,
1977 GR_VIRTUAL_STACK_ARGS
,
1978 GR_VIRTUAL_STACK_DYNAMIC
,
1979 GR_VIRTUAL_OUTGOING_ARGS
,
1985 /* Pointers to standard pieces of rtx are stored here. */
1986 extern GTY(()) rtx global_rtl
[GR_MAX
];
1988 /* Standard pieces of rtx, to be substituted directly into things. */
1989 #define pc_rtx (global_rtl[GR_PC])
1990 #define cc0_rtx (global_rtl[GR_CC0])
1992 /* All references to certain hard regs, except those created
1993 by allocating pseudo regs into them (when that's possible),
1994 go through these unique rtx objects. */
1995 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1996 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1997 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1998 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2000 extern GTY(()) rtx pic_offset_table_rtx
;
2001 extern GTY(()) rtx static_chain_rtx
;
2002 extern GTY(()) rtx static_chain_incoming_rtx
;
2003 extern GTY(()) rtx return_address_pointer_rtx
;
2005 /* Include the RTL generation functions. */
2009 #ifndef USE_MAPPED_LOCATION
2010 #undef gen_rtx_ASM_OPERANDS
2011 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
2012 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
2016 /* There are some RTL codes that require special attention; the
2017 generation functions included above do the raw handling. If you
2018 add to this list, modify special_rtx in gengenrtl.c as well. */
2020 extern rtx
gen_rtx_CONST_INT (enum machine_mode
, HOST_WIDE_INT
);
2021 extern rtx
gen_rtx_CONST_VECTOR (enum machine_mode
, rtvec
);
2022 extern rtx
gen_raw_REG (enum machine_mode
, int);
2023 extern rtx
gen_rtx_REG (enum machine_mode
, unsigned);
2024 extern rtx
gen_rtx_SUBREG (enum machine_mode
, rtx
, int);
2025 extern rtx
gen_rtx_MEM (enum machine_mode
, rtx
);
2027 /* We need the cast here to ensure that we get the same result both with
2028 and without prototypes. */
2029 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
2031 /* Virtual registers are used during RTL generation to refer to locations into
2032 the stack frame when the actual location isn't known until RTL generation
2033 is complete. The routine instantiate_virtual_regs replaces these with
2034 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2037 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2039 /* This points to the first word of the incoming arguments passed on the stack,
2040 either by the caller or by the callee when pretending it was passed by the
2043 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2045 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2047 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2048 variable on the stack. Otherwise, it points to the first variable on
2051 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2053 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2055 /* This points to the location of dynamically-allocated memory on the stack
2056 immediately after the stack pointer has been adjusted by the amount
2059 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2061 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2063 /* This points to the location in the stack at which outgoing arguments should
2064 be written when the stack is pre-pushed (arguments pushed using push
2065 insns always use sp). */
2067 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2069 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2071 /* This points to the Canonical Frame Address of the function. This
2072 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2073 but is calculated relative to the arg pointer for simplicity; the
2074 frame pointer nor stack pointer are necessarily fixed relative to
2075 the CFA until after reload. */
2077 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2079 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2081 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2083 /* Nonzero if REGNUM is a pointer into the stack frame. */
2084 #define REGNO_PTR_FRAME_P(REGNUM) \
2085 ((REGNUM) == STACK_POINTER_REGNUM \
2086 || (REGNUM) == FRAME_POINTER_REGNUM \
2087 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2088 || (REGNUM) == ARG_POINTER_REGNUM \
2089 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2090 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2092 /* REGNUM never really appearing in the INSN stream. */
2093 #define INVALID_REGNUM (~(unsigned int) 0)
2095 extern rtx
output_constant_def (tree
, int);
2096 extern rtx
lookup_constant_def (tree
);
2098 /* Nonzero after the second flow pass has completed.
2099 Set to 1 or 0 by toplev.c */
2100 extern int flow2_completed
;
2102 /* Nonzero after end of reload pass.
2103 Set to 1 or 0 by reload1.c. */
2105 extern int reload_completed
;
2107 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2108 extern int epilogue_completed
;
2110 /* Set to 1 while reload_as_needed is operating.
2111 Required by some machines to handle any generated moves differently. */
2113 extern int reload_in_progress
;
2115 /* If this is nonzero, we do not bother generating VOLATILE
2116 around volatile memory references, and we are willing to
2117 output indirect addresses. If cse is to follow, we reject
2118 indirect addresses so a useful potential cse is generated;
2119 if it is used only once, instruction combination will produce
2120 the same indirect address eventually. */
2121 extern int cse_not_expected
;
2123 /* Set to nonzero before life analysis to indicate that it is unsafe to
2124 generate any new pseudo registers. */
2125 extern int no_new_pseudos
;
2127 /* Translates rtx code to tree code, for those codes needed by
2128 REAL_ARITHMETIC. The function returns an int because the caller may not
2129 know what `enum tree_code' means. */
2131 extern int rtx_to_tree_code (enum rtx_code
);
2134 extern int delete_trivially_dead_insns (rtx
, int);
2136 extern int cse_main (rtx
, int, int, FILE *);
2138 extern void cse_condition_code_reg (void);
2141 extern int comparison_dominates_p (enum rtx_code
, enum rtx_code
);
2142 extern int condjump_p (rtx
);
2143 extern int any_condjump_p (rtx
);
2144 extern int any_uncondjump_p (rtx
);
2145 extern int safe_to_remove_jump_p (rtx
);
2146 extern rtx
pc_set (rtx
);
2147 extern rtx
condjump_label (rtx
);
2148 extern int simplejump_p (rtx
);
2149 extern int returnjump_p (rtx
);
2150 extern int onlyjump_p (rtx
);
2151 extern int only_sets_cc0_p (rtx
);
2152 extern int sets_cc0_p (rtx
);
2153 extern int invert_jump_1 (rtx
, rtx
);
2154 extern int invert_jump (rtx
, rtx
, int);
2155 extern int rtx_renumbered_equal_p (rtx
, rtx
);
2156 extern int true_regnum (rtx
);
2157 extern unsigned int reg_or_subregno (rtx
);
2158 extern int redirect_jump_1 (rtx
, rtx
);
2159 extern int redirect_jump (rtx
, rtx
, int);
2160 extern void rebuild_jump_labels (rtx
);
2161 extern enum rtx_code
reversed_comparison_code (rtx
, rtx
);
2162 extern enum rtx_code
reversed_comparison_code_parts (enum rtx_code
,
2164 extern void delete_for_peephole (rtx
, rtx
);
2165 extern int condjump_in_parallel_p (rtx
);
2166 extern void purge_line_number_notes (rtx
);
2168 /* In emit-rtl.c. */
2169 extern int max_reg_num (void);
2170 extern int max_label_num (void);
2171 extern int get_first_label_num (void);
2172 extern void maybe_set_first_label_num (rtx
);
2173 extern void delete_insns_since (rtx
);
2174 extern void mark_reg_pointer (rtx
, int);
2175 extern void mark_user_reg (rtx
);
2176 extern void reset_used_flags (rtx
);
2177 extern void set_used_flags (rtx
);
2178 extern void reorder_insns (rtx
, rtx
, rtx
);
2179 extern void reorder_insns_nobb (rtx
, rtx
, rtx
);
2180 extern int get_max_uid (void);
2181 extern int in_sequence_p (void);
2182 extern void force_next_line_note (void);
2183 extern void init_emit (void);
2184 extern void init_emit_once (int);
2185 extern void push_topmost_sequence (void);
2186 extern void pop_topmost_sequence (void);
2187 extern void reverse_comparison (rtx
);
2188 extern void set_new_first_and_last_insn (rtx
, rtx
);
2189 extern void set_new_last_label_num (int);
2190 extern void unshare_all_rtl (void);
2191 extern void unshare_all_rtl_again (rtx
);
2192 extern void unshare_all_rtl_in_chain (rtx
);
2193 extern void verify_rtl_sharing (void);
2194 extern void set_first_insn (rtx
);
2195 extern void set_last_insn (rtx
);
2196 extern void link_cc0_insns (rtx
);
2197 extern void add_insn (rtx
);
2198 extern void add_insn_before (rtx
, rtx
);
2199 extern void add_insn_after (rtx
, rtx
);
2200 extern void remove_insn (rtx
);
2201 extern void emit_insn_after_with_line_notes (rtx
, rtx
, rtx
);
2202 extern enum rtx_code
classify_insn (rtx
);
2203 extern rtx
emit (rtx
);
2204 /* Query and clear/ restore no_line_numbers. This is used by the
2205 switch / case handling in stmt.c to give proper line numbers in
2206 warnings about unreachable code. */
2207 int force_line_numbers (void);
2208 void restore_line_number_status (int old_value
);
2209 extern void renumber_insns (FILE *);
2210 extern void remove_unnecessary_notes (void);
2211 extern rtx
delete_insn (rtx
);
2212 extern rtx
entry_of_function (void);
2213 extern void delete_insn_chain (rtx
, rtx
);
2214 extern rtx
unlink_insn_chain (rtx
, rtx
);
2215 extern rtx
delete_insn_and_edges (rtx
);
2216 extern void delete_insn_chain_and_edges (rtx
, rtx
);
2217 extern rtx
gen_lowpart_SUBREG (enum machine_mode
, rtx
);
2220 extern int combine_instructions (rtx
, unsigned int);
2221 extern unsigned int extended_count (rtx
, enum machine_mode
, int);
2222 extern rtx
remove_death (unsigned int, rtx
);
2224 extern void dump_combine_stats (FILE *);
2225 extern void dump_combine_total_stats (FILE *);
2228 extern void web_main (void);
2230 /* In sched-rgn.c. */
2232 extern void schedule_insns (FILE *);
2235 /* In sched-ebb.c. */
2237 extern void schedule_ebbs (FILE *);
2240 /* In haifa-sched.c. */
2241 extern void fix_sched_param (const char *, const char *);
2243 /* In print-rtl.c */
2244 extern const char *print_rtx_head
;
2245 extern void debug_rtx (rtx
);
2246 extern void debug_rtx_list (rtx
, int);
2247 extern void debug_rtx_range (rtx
, rtx
);
2248 extern rtx
debug_rtx_find (rtx
, int);
2250 extern void print_mem_expr (FILE *, tree
);
2251 extern void print_rtl (FILE *, rtx
);
2252 extern void print_simple_rtl (FILE *, rtx
);
2253 extern int print_rtl_single (FILE *, rtx
);
2254 extern void print_inline_rtx (FILE *, rtx
, int);
2258 extern void init_loop (void);
2260 extern void loop_optimize (rtx
, FILE *, int);
2262 extern void branch_target_load_optimize (bool);
2265 extern void reposition_prologue_and_epilogue_notes (rtx
);
2266 extern void thread_prologue_and_epilogue_insns (rtx
);
2267 extern int prologue_epilogue_contains (rtx
);
2268 extern int sibcall_epilogue_contains (rtx
);
2269 extern void mark_temp_addr_taken (rtx
);
2270 extern void update_temp_slot_address (rtx
, rtx
);
2271 extern void purge_hard_subreg_sets (rtx
);
2274 extern void set_file_and_line_for_stmt (location_t
);
2275 extern void expand_null_return (void);
2276 extern void expand_naked_return (void);
2277 extern void emit_jump (rtx
);
2278 extern int preserve_subexpressions_p (void);
2281 extern rtx
move_by_pieces (rtx
, rtx
, unsigned HOST_WIDE_INT
,
2285 extern void recompute_reg_usage (rtx
, int);
2286 extern int initialize_uninitialized_subregs (void);
2287 extern void delete_dead_jumptables (void);
2289 extern void print_rtl_with_bb (FILE *, rtx
);
2290 extern void dump_flow_info (FILE *);
2294 extern void init_expmed (void);
2295 extern void expand_inc (rtx
, rtx
);
2296 extern void expand_dec (rtx
, rtx
);
2297 extern rtx
expand_mult_highpart (enum machine_mode
, rtx
,
2298 unsigned HOST_WIDE_INT
, rtx
, int, int);
2301 extern bool can_copy_p (enum machine_mode
);
2302 extern rtx
fis_get_condition (rtx
);
2304 extern int gcse_main (rtx
, FILE *);
2305 extern int bypass_jumps (FILE *);
2306 extern void gcse_after_reload_main (rtx
, FILE *);
2310 extern void mark_elimination (int, int);
2312 extern int global_alloc (FILE *);
2313 extern void dump_global_regs (FILE *);
2316 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2317 extern void retry_global_alloc (int, HARD_REG_SET
);
2319 extern void build_insn_chain (rtx
);
2322 extern int reg_classes_intersect_p (enum reg_class
, enum reg_class
);
2323 extern int reg_class_subset_p (enum reg_class
, enum reg_class
);
2324 extern void globalize_reg (int);
2325 extern void init_reg_modes_once (void);
2326 extern void init_regs (void);
2327 extern void init_fake_stack_mems (void);
2328 extern void init_reg_sets (void);
2329 extern void regset_release_memory (void);
2330 extern void regclass_init (void);
2331 extern void regclass (rtx
, int, FILE *);
2332 extern void reg_scan (rtx
, unsigned int, int);
2333 extern void reg_scan_update (rtx
, rtx
, unsigned int);
2334 extern void fix_register (const char *, int, int);
2336 extern void cannot_change_mode_set_regs (HARD_REG_SET
*,
2337 enum machine_mode
, unsigned int);
2339 extern bool invalid_mode_change_p (unsigned int, enum reg_class
,
2344 extern void regmove_optimize (rtx
, int, FILE *);
2346 extern void combine_stack_adjustments (void);
2350 extern void dbr_schedule (rtx
, FILE *);
2353 /* In local-alloc.c */
2355 extern void dump_local_alloc (FILE *);
2357 extern int local_alloc (void);
2359 /* In reg-stack.c */
2361 extern bool reg_to_stack (FILE *);
2370 LCT_CONST_MAKE_BLOCK
= 3,
2371 LCT_PURE_MAKE_BLOCK
= 4,
2374 LCT_ALWAYS_RETURN
= 7,
2375 LCT_RETURNS_TWICE
= 8
2378 extern void emit_library_call (rtx
, enum libcall_type
, enum machine_mode
, int,
2380 extern rtx
emit_library_call_value (rtx
, rtx
, enum libcall_type
,
2381 enum machine_mode
, int, ...);
2384 extern int set_dominates_use (int, int, int, rtx
, rtx
);
2387 extern int in_data_section (void);
2388 extern void init_varasm_once (void);
2391 extern void init_rtl (void);
2392 extern void traverse_md_constants (int (*) (void **, void *), void *);
2393 struct md_constant
{ char *name
, *value
; };
2396 extern int read_skip_spaces (FILE *);
2397 extern rtx
read_rtx (FILE *);
2400 extern const char *read_rtx_filename
;
2401 extern int read_rtx_lineno
;
2403 /* Redefine abort to report an internal error w/o coredump, and
2404 reporting the location of the error in the source file. This logic
2405 is duplicated in rtl.h and tree.h because every file that needs the
2406 special abort includes one or both. toplev.h gets too few files,
2407 system.h gets too many. */
2409 extern void fancy_abort (const char *, int, const char *)
2411 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2414 extern void clear_reg_alias_info (rtx
);
2415 extern rtx
canon_rtx (rtx
);
2416 extern int true_dependence (rtx
, enum machine_mode
, rtx
, int (*)(rtx
, int));
2417 extern rtx
get_addr (rtx
);
2418 extern int canon_true_dependence (rtx
, enum machine_mode
, rtx
, rtx
,
2420 extern int read_dependence (rtx
, rtx
);
2421 extern int anti_dependence (rtx
, rtx
);
2422 extern int output_dependence (rtx
, rtx
);
2423 extern int unchanging_anti_dependence (rtx
, rtx
);
2424 extern void mark_constant_function (void);
2425 extern void init_alias_once (void);
2426 extern void init_alias_analysis (void);
2427 extern void end_alias_analysis (void);
2428 extern rtx
addr_side_effect_eval (rtx
, int, int);
2429 extern bool memory_modified_in_insn_p (rtx
, rtx
);
2430 extern rtx
find_base_term (rtx
);
2431 extern rtx
gen_hard_reg_clobber (enum machine_mode
, unsigned int);
2432 extern rtx
get_reg_known_value (unsigned int);
2433 extern bool get_reg_known_equiv_p (unsigned int);
2436 extern int stack_regs_mentioned (rtx insn
);
2440 extern GTY(()) rtx stack_limit_rtx
;
2442 /* In regrename.c */
2443 extern void regrename_optimize (void);
2444 extern void copyprop_hardreg_forward (void);
2447 extern void if_convert (int);
2450 extern void invert_br_probabilities (rtx
);
2451 extern bool expensive_function_p (int);
2453 extern void tracer (void);
2455 /* In var-tracking.c */
2456 extern void variable_tracking_main (void);
2458 /* In stor-layout.c. */
2459 extern void get_mode_bounds (enum machine_mode
, int, enum machine_mode
,
2462 /* In loop-unswitch.c */
2463 extern rtx
reversed_condition (rtx
);
2464 extern rtx
compare_and_jump_seq (rtx
, rtx
, enum rtx_code
, rtx
, int, rtx
);
2467 extern rtx
canon_condition (rtx
);
2468 extern void simplify_using_condition (rtx
, rtx
*, struct bitmap_head_def
*);
2471 extern void reg_alloc (void);
2473 /* In modulo-sched.c. */
2475 extern void sms_schedule (FILE *);
2480 rtx (*gen_lowpart
) (enum machine_mode
, rtx
);
2481 rtx (*reg_nonzero_bits
) (rtx
, enum machine_mode
, rtx
, enum machine_mode
,
2482 unsigned HOST_WIDE_INT
, unsigned HOST_WIDE_INT
*);
2483 rtx (*reg_num_sign_bit_copies
) (rtx
, enum machine_mode
, rtx
, enum machine_mode
,
2484 unsigned int, unsigned int *);
2486 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2489 /* Each pass can provide its own. */
2490 extern struct rtl_hooks rtl_hooks
;
2492 /* ... but then it has to restore these. */
2493 extern const struct rtl_hooks general_rtl_hooks
;
2495 /* Keep this for the nonce. */
2496 #define gen_lowpart rtl_hooks.gen_lowpart
2498 #endif /* ! GCC_RTL_H */