1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002 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
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
34 /* Value used by some passes to "recognize" noop moves as valid
36 #define NOOP_MOVE_INSN_CODE INT_MAX
38 /* Register Transfer Language EXPRESSIONS CODES */
40 #define RTX_CODE enum rtx_code
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
49 Assumes default enum value assignment. */
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
54 extern const unsigned char rtx_length[NUM_RTX_CODE];
55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
57 extern const char * const rtx_name[NUM_RTX_CODE];
58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
60 extern const char * const rtx_format[NUM_RTX_CODE];
61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
63 extern const char rtx_class[NUM_RTX_CODE];
64 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
66 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
67 relative to which the offsets are calculated, as explained in rtl.def. */
70 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
71 unsigned min_align: 8;
73 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
74 unsigned min_after_vec: 1; /* minimum address target label is
75 after the ADDR_DIFF_VEC. */
76 unsigned max_after_vec: 1; /* maximum address target label is
77 after the ADDR_DIFF_VEC. */
78 unsigned min_after_base: 1; /* minimum address target label is
80 unsigned max_after_base: 1; /* maximum address target label is
82 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
83 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
86 } addr_diff_vec_flags;
88 /* Structure used to describe the attributes of a MEM. These are hashed
89 so MEMs that the same attributes share a data structure. This means
90 they cannot be modified in place. If any element is nonzero, it means
91 the value of the corresponding attribute is unknown. */
94 HOST_WIDE_INT alias; /* Memory alias set. */
95 tree expr; /* expr corresponding to MEM. */
96 rtx offset; /* Offset from start of DECL, as CONST_INT. */
97 rtx size; /* Size in bytes, as a CONST_INT. */
98 unsigned int align; /* Alignment of MEM in bits. */
101 /* Common union for an element of an rtx. */
103 typedef union rtunion_def
105 HOST_WIDE_INT rtwint;
111 enum machine_mode rttype;
112 addr_diff_vec_flags rt_addr_diff_vec_flags;
113 struct cselib_val_struct *rt_cselib;
114 struct bitmap_head_def *rtbit;
116 struct basic_block_def *bb;
120 /* RTL expression ("rtx"). */
124 /* The kind of expression this is. */
125 ENUM_BITFIELD(rtx_code) code: 16;
127 /* The kind of value the expression has. */
128 ENUM_BITFIELD(machine_mode) mode : 8;
130 /* 1 in an INSN if it can alter flow of control
131 within this function.
132 MEM_KEEP_ALIAS_SET_P in a MEM.
133 LINK_COST_ZERO in an INSN_LIST.
134 SET_IS_RETURN_P in a SET. */
135 unsigned int jump : 1;
136 /* 1 in an INSN if it can call another function.
137 LINK_COST_FREE in an INSN_LIST. */
138 unsigned int call : 1;
139 /* 1 in a REG if value of this expression will never change during
140 the current function, even though it is not manifestly constant.
141 1 in a MEM if contents of memory are constant. This does not
142 necessarily mean that the value of this expression is constant.
143 1 in a SUBREG if it is from a promoted variable that is unsigned.
144 1 in a SYMBOL_REF if it addresses something in the per-function
146 1 in a CALL_INSN if it is a const call.
147 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
148 reorg until end of compilation; cleared before used. */
149 unsigned int unchanging : 1;
150 /* 1 in a MEM expression if contents of memory are volatile.
151 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
153 1 in a REG expression if corresponds to a variable declared by the user.
154 0 for an internally generated temporary.
155 In a SYMBOL_REF, this flag is used for machine-specific purposes.
156 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
157 unsigned int volatil : 1;
158 /* 1 in a MEM referring to a field of an aggregate.
159 0 if the MEM was a variable or the result of a * operator in C;
160 1 if it was the result of a . or -> operator (on a struct) in C.
161 1 in a REG if the register is used only in exit code a loop.
162 1 in a SUBREG expression if was generated from a variable with a
164 1 in a CODE_LABEL if the label is used for nonlocal gotos
165 and must not be deleted even if its count is zero.
166 1 in a LABEL_REF if this is a reference to a label outside the
168 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
169 together with the preceding insn. Valid only within sched.
170 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
171 from the target of a branch. Valid from reorg until end of compilation;
173 1 in an INSN if this insn is dead code. Valid only during
174 dead-code elimination phase; cleared before use. */
175 unsigned int in_struct : 1;
176 /* 1 if this rtx is used. This is used for copying shared structure.
177 See `unshare_all_rtl'.
178 In a REG, this is not needed for that purpose, and used instead
179 in `leaf_renumber_regs_insn'.
180 In a SYMBOL_REF, means that emit_library_call
181 has used it as the function. */
182 unsigned int used : 1;
183 /* Nonzero if this rtx came from procedure integration.
184 In a REG, nonzero means this reg refers to the return value
185 of the current function.
186 1 in a SYMBOL_REF if the symbol is weak. */
187 unsigned integrated : 1;
188 /* 1 in an INSN or a SET if this rtx is related to the call frame,
189 either changing how we compute the frame address or saving and
190 restoring registers in the prologue and epilogue.
191 1 in a MEM if the MEM refers to a scalar, rather than a member of
193 1 in a REG if the register is a pointer.
194 1 in a SYMBOL_REF if it addresses something in the per-function
195 constant string pool. */
196 unsigned frame_related : 1;
198 /* The first element of the operands of this rtx.
199 The number of operands and their types are controlled
200 by the `code' field, according to rtl.def. */
204 #define NULL_RTX (rtx) 0
206 /* Define macros to access the `code' field of the rtx. */
208 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
209 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
211 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
212 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
214 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
215 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
216 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
218 /* RTL vector. These appear inside RTX's when there is a need
219 for a variable number of things. The principle use is inside
220 PARALLEL expressions. */
223 int num_elem; /* number of elements */
227 #define NULL_RTVEC (rtvec) 0
229 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
230 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
232 /* Predicate yielding nonzero iff X is an rtl for a register. */
233 #define REG_P(X) (GET_CODE (X) == REG)
235 /* Predicate yielding nonzero iff X is a label insn. */
236 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
238 /* Predicate yielding nonzero iff X is a jump insn. */
239 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
241 /* Predicate yielding nonzero iff X is a note insn. */
242 #define NOTE_P(X) (GET_CODE (X) == NOTE)
244 /* Predicate yielding nonzero iff X is a barrier insn. */
245 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
247 /* Predicate yielding nonzero iff X is a data for a jump table. */
248 #define JUMP_TABLE_DATA_P(INSN) \
249 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
250 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
252 /* 1 if X is a constant value that is an integer. */
254 #define CONSTANT_P(X) \
255 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
256 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
257 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
258 || GET_CODE (X) == CONST_VECTOR \
259 || GET_CODE (X) == CONSTANT_P_RTX)
261 /* General accessor macros for accessing the fields of an rtx. */
263 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
264 /* The bit with a star outside the statement expr and an & inside is
265 so that N can be evaluated only once. */
266 #define RTL_CHECK1(RTX, N, C1) __extension__ \
267 (*({ rtx const _rtx = (RTX); const int _n = (N); \
268 const enum rtx_code _code = GET_CODE (_rtx); \
269 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
270 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
272 if (GET_RTX_FORMAT(_code)[_n] != C1) \
273 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
277 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
278 (*({ rtx const _rtx = (RTX); const int _n = (N); \
279 const enum rtx_code _code = GET_CODE (_rtx); \
280 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
281 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
283 if (GET_RTX_FORMAT(_code)[_n] != C1 \
284 && GET_RTX_FORMAT(_code)[_n] != C2) \
285 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
289 #define RTL_CHECKC1(RTX, N, C) __extension__ \
290 (*({ rtx const _rtx = (RTX); const int _n = (N); \
291 if (GET_CODE (_rtx) != (C)) \
292 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
296 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
297 (*({ rtx const _rtx = (RTX); const int _n = (N); \
298 const enum rtx_code _code = GET_CODE (_rtx); \
299 if (_code != (C1) && _code != (C2)) \
300 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
304 #define RTVEC_ELT(RTVEC, I) __extension__ \
305 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
306 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
307 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
309 &_rtvec->elem[_i]; }))
311 extern void rtl_check_failed_bounds PARAMS ((rtx, int,
312 const char *, int, const char *))
314 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
315 const char *, int, const char *))
317 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
318 const char *, int, const char *))
320 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
321 const char *, int, const char *))
323 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
324 const char *, int, const char *))
326 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
327 const char *, int, const char *))
330 #else /* not ENABLE_RTL_CHECKING */
332 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
333 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
334 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
335 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
336 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
340 #define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
341 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
342 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
343 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
344 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
345 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
346 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
347 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
348 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
349 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
351 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
352 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
354 /* These are like XWINT, etc. except that they expect a '0' field instead
355 of the normal type code. */
357 #define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
358 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
359 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
360 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
361 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
362 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
363 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
364 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
365 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
366 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
367 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
368 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
369 #define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem)
371 #define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
372 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
373 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
374 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
375 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
376 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
377 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
378 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
379 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
380 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
381 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
382 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
384 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
385 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
387 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
389 /* ACCESS MACROS for particular fields of insns. */
391 /* Determines whether X is an insn. */
392 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
394 /* Holds a unique number for each insn.
395 These are not necessarily sequentially increasing. */
396 #define INSN_UID(INSN) XINT (INSN, 0)
398 /* Chain insns together in sequence. */
399 #define PREV_INSN(INSN) XEXP (INSN, 1)
400 #define NEXT_INSN(INSN) XEXP (INSN, 2)
402 /* The body of an insn. */
403 #define PATTERN(INSN) XEXP (INSN, 3)
405 /* Code number of instruction, from when it was recognized.
406 -1 means this instruction has not been recognized yet. */
407 #define INSN_CODE(INSN) XINT (INSN, 4)
409 /* Set up in flow.c; empty before then.
410 Holds a chain of INSN_LIST rtx's whose first operands point at
411 previous insns with direct data-flow connections to this one.
412 That means that those insns set variables whose next use is in this insn.
413 They are always in the same basic block as this insn. */
414 #define LOG_LINKS(INSN) XEXP(INSN, 5)
416 /* 1 if insn has been deleted. */
417 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
419 /* 1 if insn is a call to a const or pure function. */
420 #define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging)
422 /* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
423 #define SIBLING_CALL_P(INSN) ((INSN)->jump)
425 /* 1 if insn is a branch that should not unconditionally execute its
426 delay slots, i.e., it is an annulled branch. */
427 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
429 /* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
430 #define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
432 /* 1 if insn is in a delay slot and is from the target of the branch. If
433 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
434 executed if the branch is taken. For annulled branches with this bit
435 clear, the insn should be executed only if the branch is not taken. */
436 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
438 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
440 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
442 /* Holds a list of notes on what this insn does to various REGs.
443 It is a chain of EXPR_LIST rtx's, where the second operand is the
444 chain pointer and the first operand is the REG being described.
445 The mode field of the EXPR_LIST contains not a real machine mode
446 but a value from enum reg_note. */
448 #define REG_NOTES(INSN) XEXP(INSN, 6)
450 /* Don't forget to change reg_note_name in rtl.c. */
453 /* The value in REG dies in this insn (i.e., it is not needed past
454 this insn). If REG is set in this insn, the REG_DEAD note may,
455 but need not, be omitted. */
458 /* The REG is autoincremented or autodecremented. */
461 /* Describes the insn as a whole; it says that the insn sets a register
462 to a constant value or to be equivalent to a memory address. If the
463 register is spilled to the stack then the constant value should be
464 substituted for it. The contents of the REG_EQUIV is the constant
465 value or memory address, which may be different from the source of
466 the SET although it has the same value. A REG_EQUIV note may also
467 appear on an insn which copies a register parameter to a pseudo-register,
468 if there is a memory address which could be used to hold that
469 pseudo-register throughout the function. */
472 /* Like REG_EQUIV except that the destination is only momentarily equal
473 to the specified rtx. Therefore, it cannot be used for substitution;
474 but it can be used for cse. */
477 /* The register set in this insn held 0 before the insn. The contents of
478 the note is the insn that stored the 0. If that insn is deleted or
479 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
480 is actually an INSN_LIST, not an EXPR_LIST. */
483 /* This insn copies the return-value of a library call out of the hard reg
484 for return values. This note is actually an INSN_LIST and it points to
485 the first insn involved in setting up arguments for the call. flow.c
486 uses this to delete the entire library call when its result is dead. */
489 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
490 and points at the one that has the REG_RETVAL. This note is also an
494 /* The register is always nonnegative during the containing loop. This is
495 used in branches so that decrement and branch instructions terminating
496 on zero can be matched. There must be an insn pattern in the md file
497 named `decrement_and_branch_until_zero' or else this will never be added
498 to any instructions. */
501 /* There is no conflict *after this insn* between the register in the note
502 and the destination of this insn. */
505 /* Identifies a register set in this insn and never used. */
508 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
509 respectively. Normally, these are required to be consecutive insns, but
510 we permit putting a cc0-setting insn in the delay slot of a branch as
511 long as only one copy of the insn exists. In that case, these notes
512 point from one to the other to allow code generation to determine what
513 any require information and to properly update CC_STATUS. These notes
515 REG_CC_SETTER, REG_CC_USER,
517 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
518 CODE_LABEL contained in the REG_LABEL note is used by the insn.
519 This note is an INSN_LIST. */
522 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
523 write-after-read and write-after-write dependencies respectively.
524 Data dependencies, which are the only type of LOG_LINK created by
525 flow, are represented by a 0 reg note kind. */
526 REG_DEP_ANTI, REG_DEP_OUTPUT,
528 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
529 It has an integer value. For jumps, it is the probability that this is a
530 taken branch. For calls, it is the probability that this call won't
534 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
535 the first insn after each CALL_INSN. It indicates how many times this
536 block was executed. */
539 /* Attached to a call insn; indicates that the call is malloc-like and
540 that the pointer returned cannot alias anything else. */
543 /* Used to optimize rtl generated by dynamic stack allocations for targets
544 where SETJMP_VIA_SAVE_AREA is true. */
547 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
548 CONCAT of two integer value. First specifies the branch predictor
549 that added the note, second specifies the predicted hitrate of branch
550 in the same format as REG_BR_PROB note uses. */
553 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
554 for DWARF to interpret what they imply. The attached rtx is used
555 instead of intuition. */
556 REG_FRAME_RELATED_EXPR,
558 /* Indicates that REG holds the exception context for the function.
559 This context is shared by inline functions, so the code to acquire
560 the real exception context is delayed until after inlining. */
563 /* Indicates what exception region an INSN belongs in. This is used to
564 indicate what region to which a call may throw. REGION 0 indicates
565 that a call cannot throw at all. REGION -1 indicates that it cannot
566 throw, nor will it execute a non-local goto. */
569 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
572 /* Indicates that this insn (which is part of the prologue) computes
573 a value which might not be used later, and if so it's OK to delete
574 the insn. Normally, deleting any insn in the prologue is an error.
575 At present the parameter is unused and set to (const_int 0). */
578 /* Indicates that a call does not return. */
581 /* Indicates that an indirect jump is a non-local goto instead of a
585 /* This kind of note is generated at each to `setjmp',
586 and similar functions that can return twice. */
589 /* Indicate calls that always returns. */
592 /* Indicate that the memory load references a vtable. The expression
593 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
597 /* The base value for branch probability notes. */
598 #define REG_BR_PROB_BASE 10000
600 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
601 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
602 #define PUT_REG_NOTE_KIND(LINK, KIND) \
603 PUT_MODE (LINK, (enum machine_mode) (KIND))
605 /* Names for REG_NOTE's in EXPR_LIST insn's. */
607 extern const char * const reg_note_name[];
608 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
610 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
611 USE and CLOBBER expressions.
612 USE expressions list the registers filled with arguments that
613 are passed to the function.
614 CLOBBER expressions document the registers explicitly clobbered
616 Pseudo registers can not be mentioned in this list. */
617 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
619 /* The label-number of a code-label. The assembler label
620 is made from `L' and the label-number printed in decimal.
621 Label numbers are unique in a compilation. */
622 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 5)
624 #define LINE_NUMBER NOTE
626 /* In a NOTE that is a line number, this is a string for the file name that the
627 line is in. We use the same field to record block numbers temporarily in
628 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
629 between ints and pointers if we use a different macro for the block number.)
630 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
631 information as an rtx in the field. */
633 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 3, NOTE)
634 #define NOTE_BLOCK(INSN) XCTREE (INSN, 3, NOTE)
635 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 3, NOTE)
636 #define NOTE_RANGE_INFO(INSN) XCEXP (INSN, 3, NOTE)
637 #define NOTE_LIVE_INFO(INSN) XCEXP (INSN, 3, NOTE)
638 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 3, NOTE)
639 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 3, NOTE)
641 /* In a NOTE that is a line number, this is the line number.
642 Other kinds of NOTEs are identified by negative numbers here. */
643 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 4, NOTE)
645 /* Nonzero if INSN is a note marking the beginning of a basic block. */
646 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
647 (GET_CODE (INSN) == NOTE \
648 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
650 /* Codes that appear in the NOTE_LINE_NUMBER field
651 for kinds of notes that are not line numbers.
653 Notice that we do not try to use zero here for any of
654 the special note codes because sometimes the source line
655 actually can be zero! This happens (for example) when we
656 are generating code for the per-translation-unit constructor
657 and destructor routines for some C++ translation unit.
659 If you should change any of the following values, or if you
660 should add a new value here, don't forget to change the
661 note_insn_name array in rtl.c. */
665 /* Keep all of these numbers negative. Adjust as needed. */
666 NOTE_INSN_BIAS = -100,
668 /* This note is used to get rid of an insn
669 when it isn't safe to patch the insn out of the chain. */
672 /* These are used to mark the beginning and end of a lexical block.
673 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
677 /* These mark the extremes of a loop. */
681 /* Generated at the place in a loop that `continue' jumps to. */
683 /* Generated at the start of a duplicated exit test. */
686 /* Generated at the end of a conditional at the top of the loop.
687 This is used to perform a lame form of loop rotation in lieu
688 of actually understanding the loop structure. The note is
689 discarded after rotation is complete. */
690 NOTE_INSN_LOOP_END_TOP_COND,
692 /* This kind of note is generated at the end of the function body,
693 just before the return insn or return label. In an optimizing
694 compilation it is deleted by the first jump optimization, after
695 enabling that optimizer to determine whether control can fall
696 off the end of the function body without a return statement. */
697 NOTE_INSN_FUNCTION_END,
699 /* This marks the point immediately after the last prologue insn. */
700 NOTE_INSN_PROLOGUE_END,
702 /* This marks the point immediately prior to the first epilogue insn. */
703 NOTE_INSN_EPILOGUE_BEG,
705 /* Generated in place of user-declared labels when they are deleted. */
706 NOTE_INSN_DELETED_LABEL,
708 /* This note indicates the start of the real body of the function,
709 i.e. the point just after all of the parms have been moved into
711 NOTE_INSN_FUNCTION_BEG,
713 /* These note where exception handling regions begin and end.
714 Uses NOTE_EH_HANDLER to identify the region in question. */
715 NOTE_INSN_EH_REGION_BEG,
716 NOTE_INSN_EH_REGION_END,
718 /* Generated whenever a duplicate line number note is output. For example,
719 one is output after the end of an inline function, in order to prevent
720 the line containing the inline call from being counted twice in gcov. */
721 NOTE_INSN_REPEATED_LINE_NUMBER,
723 /* Start/end of a live range region, where pseudos allocated on the stack
724 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
728 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
731 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
732 NOTE_INSN_BASIC_BLOCK,
734 /* Record the expected value of a register at a location. Uses
735 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
736 NOTE_INSN_EXPECTED_VALUE,
741 /* Names for NOTE insn's other than line numbers. */
743 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
744 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
745 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
747 /* The name of a label, in case it corresponds to an explicit label
748 in the input source code. */
749 #define LABEL_NAME(RTX) XCSTR (RTX, 6, CODE_LABEL)
751 /* In jump.c, each label contains a count of the number
752 of LABEL_REFs that point at it, so unused labels can be deleted. */
753 #define LABEL_NUSES(RTX) XCINT (RTX, 3, CODE_LABEL)
755 /* Associate a name with a CODE_LABEL. */
756 #define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
758 /* The original regno this ADDRESSOF was built for. */
759 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
761 /* The variable in the register we took the address of. */
762 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
764 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
765 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
766 be decremented and possibly the label can be deleted. */
767 #define JUMP_LABEL(INSN) XCEXP (INSN, 7, JUMP_INSN)
769 /* Once basic blocks are found in flow.c,
770 each CODE_LABEL starts a chain that goes through
771 all the LABEL_REFs that jump to that label.
772 The chain eventually winds up at the CODE_LABEL: it is circular. */
773 #define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
775 /* This is the field in the LABEL_REF through which the circular chain
776 of references to a particular label is linked.
777 This chain is set up in flow.c. */
779 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
781 /* Once basic blocks are found in flow.c,
782 Each LABEL_REF points to its containing instruction with this field. */
784 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
786 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
787 the number the register originally had; for a pseudo register turned into
788 a hard reg this will hold the old pseudo register number. */
790 #define REGNO(RTX) XCUINT (RTX, 0, REG)
791 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
793 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
794 is the current function's return value. */
796 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
798 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
799 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
801 /* 1 in a REG rtx if the register is a pointer. */
802 #define REG_POINTER(RTX) ((RTX)->frame_related)
804 /* 1 if the given register REG corresponds to a hard register. */
805 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
807 /* 1 if the given register number REG_NO corresponds to a hard register. */
808 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
810 /* For a CONST_INT rtx, INTVAL extracts the integer. */
812 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
814 /* For a CONST_DOUBLE:
815 The usual two ints that hold the value.
816 For a DImode, that is all there are;
817 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
818 For a float, the number of ints varies,
819 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
820 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
821 #define CONST_DOUBLE_LOW(r) XCWINT (r, 1, CONST_DOUBLE)
822 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 2, CONST_DOUBLE)
824 /* Link for chain of all CONST_DOUBLEs in use in current function. */
825 #define CONST_DOUBLE_CHAIN(r) XCEXP (r, 0, CONST_DOUBLE)
827 /* For a CONST_VECTOR, return element #n. */
828 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
830 /* For a CONST_VECTOR, return the number of elements in a vector. */
831 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
833 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
834 SUBREG_BYTE extracts the byte-number. */
836 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
837 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
840 extern unsigned int subreg_lsb PARAMS ((rtx));
841 extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
845 extern unsigned int subreg_regno PARAMS ((rtx));
847 /* 1 if the REG contained in SUBREG_REG is already known to be
848 sign- or zero-extended from the mode of the SUBREG to the mode of
849 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
852 When used as a LHS, is means that this extension must be done
853 when assigning to SUBREG_REG. */
855 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
856 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
859 (RTX)->volatil = 1; \
861 (RTX)->volatil = 0; \
862 (RTX)->unchanging = (VAL); \
865 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->volatil ? -1 : (RTX)->unchanging)
867 /* Access various components of an ASM_OPERANDS rtx. */
869 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
870 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
871 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
872 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
873 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
874 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
875 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
876 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
877 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
878 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
879 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
880 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
881 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
882 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
883 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
885 /* For a MEM RTX, 1 if we should keep the alias set for this mem
886 unchanged when we access a component. Set to 1, or example, when we
887 are already in a non-addressable component of an aggregate. */
888 #define MEM_KEEP_ALIAS_SET_P(RTX) ((RTX)->jump)
890 /* For a MEM rtx, 1 if it's a volatile reference.
891 Also in an ASM_OPERANDS rtx. */
892 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
894 /* For a MEM rtx, 1 if it refers to an aggregate, either to the
895 aggregate itself of to a field of the aggregate. If zero, RTX may
896 or may not be such a reference. */
897 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
899 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
900 not refer to a scalar. */
901 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
903 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
904 RTX. Otherwise, vice versa. Use this macro only when you are
905 *sure* that you know that the MEM is in a structure, or is a
906 scalar. VAL is evaluated only once. */
907 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
911 MEM_IN_STRUCT_P (RTX) = 1; \
912 MEM_SCALAR_P (RTX) = 0; \
916 MEM_IN_STRUCT_P (RTX) = 0; \
917 MEM_SCALAR_P (RTX) = 1; \
921 /* The memory attribute block. We provide access macros for each value
922 in the block and provide defaults if none specified. */
923 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
925 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
926 set, and may alias anything. Otherwise, the MEM can only alias
927 MEMs in the same alias set. This value is set in a
928 language-dependent manner in the front-end, and should not be
929 altered in the back-end. These set numbers are tested for zero,
930 and compared for equality; they have no other significance. In
931 some front-ends, these numbers may correspond in some way to types,
932 or other language-level entities, but they need not, and the
933 back-end makes no such assumptions. */
934 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
936 /* For a MEM rtx, the decl it is known to refer to, if it is known to
937 refer to part of a DECL. It may also be a COMPONENT_REF. */
938 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
940 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
941 RTX that is always a CONST_INT. */
942 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
944 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
945 is always a CONST_INT. */
946 #define MEM_SIZE(RTX) \
947 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
948 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
951 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
952 mode as a default when STRICT_ALIGNMENT, but not if not. */
953 #define MEM_ALIGN(RTX) \
954 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
955 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
956 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
958 /* Copy the attributes that apply to memory locations from RHS to LHS. */
959 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
960 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
961 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
962 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
963 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
964 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
965 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
967 /* For a LABEL_REF, 1 means that this reference is to a label outside the
968 loop containing the reference. */
969 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
971 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
972 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
973 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
975 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
976 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
978 /* For a REG, 1 means the register is used only in an exit test of a loop. */
979 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
981 /* During sched, for an insn, 1 means that the insn must be scheduled together
982 with the preceding insn. */
983 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
985 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
986 cost of the dependence link. The cost of executing an instruction
987 may vary based on how the results are used. LINK_COST_ZERO is 1 when
988 the cost through the link varies and is unchanged (i.e., the link has
989 zero additional cost). LINK_COST_FREE is 1 when the cost through the
990 link is zero (i.e., the link makes the cost free). In other cases,
991 the adjustment to the cost is recomputed each time it is needed. */
992 #define LINK_COST_ZERO(X) ((X)->jump)
993 #define LINK_COST_FREE(X) ((X)->call)
995 /* For a SET rtx, SET_DEST is the place that is set
996 and SET_SRC is the value it is set to. */
997 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
998 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
999 #define SET_IS_RETURN_P(RTX) ((RTX)->jump)
1001 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1002 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1003 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1005 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1006 conditionally executing the code on, COND_EXEC_CODE is the code
1007 to execute if the condition is true. */
1008 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1009 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1011 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
1012 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
1014 /* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
1015 #define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
1017 /* Flag in a SYMBOL_REF for machine-specific purposes. */
1018 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
1020 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
1021 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
1023 /* 1 means a SYMBOL_REF is weak. */
1024 #define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
1026 /* Define a macro to look for REG_INC notes,
1027 but save time on machines where they never exist. */
1029 /* Don't continue this line--convex cc version 4.1 would lose. */
1030 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1031 #define FIND_REG_INC_NOTE(INSN, REG) \
1032 ((REG) != NULL_RTX && REG_P ((REG)) \
1033 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1034 : find_reg_note ((INSN), REG_INC, (REG)))
1036 #define FIND_REG_INC_NOTE(INSN, REG) 0
1039 /* Indicate whether the machine has any sort of auto increment addressing.
1040 If not, we can avoid checking for REG_INC notes. */
1042 /* Don't continue this line--convex cc version 4.1 would lose. */
1043 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1044 #define AUTO_INC_DEC
1047 #ifndef HAVE_PRE_INCREMENT
1048 #define HAVE_PRE_INCREMENT 0
1051 #ifndef HAVE_PRE_DECREMENT
1052 #define HAVE_PRE_DECREMENT 0
1055 #ifndef HAVE_POST_INCREMENT
1056 #define HAVE_POST_INCREMENT 0
1059 #ifndef HAVE_POST_DECREMENT
1060 #define HAVE_POST_DECREMENT 0
1063 #ifndef HAVE_POST_MODIFY_DISP
1064 #define HAVE_POST_MODIFY_DISP 0
1067 #ifndef HAVE_POST_MODIFY_REG
1068 #define HAVE_POST_MODIFY_REG 0
1071 #ifndef HAVE_PRE_MODIFY_DISP
1072 #define HAVE_PRE_MODIFY_DISP 0
1075 #ifndef HAVE_PRE_MODIFY_REG
1076 #define HAVE_PRE_MODIFY_REG 0
1080 /* Some architectures do not have complete pre/post increment/decrement
1081 instruction sets, or only move some modes efficiently. These macros
1082 allow us to tune autoincrement generation. */
1084 #ifndef USE_LOAD_POST_INCREMENT
1085 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1088 #ifndef USE_LOAD_POST_DECREMENT
1089 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1092 #ifndef USE_LOAD_PRE_INCREMENT
1093 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1096 #ifndef USE_LOAD_PRE_DECREMENT
1097 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1100 #ifndef USE_STORE_POST_INCREMENT
1101 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1104 #ifndef USE_STORE_POST_DECREMENT
1105 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1108 #ifndef USE_STORE_PRE_INCREMENT
1109 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1112 #ifndef USE_STORE_PRE_DECREMENT
1113 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1117 /* Accessors for RANGE_INFO. */
1118 /* For RANGE_{START,END} notes return the RANGE_START note. */
1119 #define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
1121 /* For RANGE_{START,END} notes return the RANGE_START note. */
1122 #define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
1124 /* For RANGE_{START,END} notes, return the vector containing the registers used
1126 #define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1127 #define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1128 #define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
1130 /* For RANGE_{START,END} notes, the number of calls within the range. */
1131 #define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
1133 /* For RANGE_{START,END} notes, the number of insns within the range. */
1134 #define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
1136 /* For RANGE_{START,END} notes, a unique # to identify this range. */
1137 #define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
1139 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
1140 #define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
1142 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
1143 #define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
1145 /* For RANGE_{START,END} notes, the loop depth the range is in. */
1146 #define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
1148 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
1150 #define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
1152 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
1154 #define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
1156 /* For RANGE_START notes, the marker # of the start of the range. */
1157 #define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
1159 /* For RANGE_START notes, the marker # of the end of the range. */
1160 #define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
1162 /* Original pseudo register # for a live range note. */
1163 #define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
1165 /* Pseudo register # original register is copied into or -1. */
1166 #define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
1168 /* How many times a register in a live range note was referenced. */
1169 #define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
1171 /* How many times a register in a live range note was set. */
1172 #define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
1174 /* How many times a register in a live range note died. */
1175 #define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
1177 /* Whether the original value is needed to be copied into the range register at
1178 the start of the range. */
1179 #define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
1181 /* # of insns the register copy is live over. */
1182 #define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
1184 /* # of calls the register copy is live over. */
1185 #define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
1187 /* DECL_NODE pointer of the declaration if the register is a user defined
1189 #define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
1191 /* BLOCK_NODE pointer to the block the variable is declared in if the
1192 register is a user defined variable. */
1193 #define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
1195 /* EXPR_LIST of the distinct ranges a variable is in. */
1196 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1198 /* Block a variable is declared in. */
1199 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1201 /* # of distinct ranges a variable is in. */
1202 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1204 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1205 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1207 /* For a NOTE_INSN_LIVE note, the original basic block number. */
1208 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
1210 /* Determine if the insn is a PHI node. */
1211 #define PHI_NODE_P(X) \
1212 ((X) && GET_CODE (X) == INSN \
1213 && GET_CODE (PATTERN (X)) == SET \
1214 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1216 /* Nonzero if we need to distinguish between the return value of this function
1217 and the return value of a function called by this function. This helps
1219 This is 1 until after the rtl generation pass. */
1220 extern int rtx_equal_function_value_matters;
1222 /* Nonzero when we are generating CONCATs. */
1223 extern int generating_concat_p;
1225 /* Generally useful functions. */
1228 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
1230 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1233 extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
1236 extern void set_stack_check_libfunc PARAMS ((rtx));
1237 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
1238 enum machine_mode));
1239 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1240 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1241 extern void optimize_save_area_alloca PARAMS ((rtx));
1244 extern rtx gen_rtx PARAMS ((enum rtx_code,
1245 enum machine_mode, ...));
1246 extern rtvec gen_rtvec PARAMS ((int, ...));
1247 extern rtx copy_insn_1 PARAMS ((rtx));
1248 extern rtx copy_insn PARAMS ((rtx));
1249 extern rtx gen_int_mode PARAMS ((HOST_WIDE_INT,
1250 enum machine_mode));
1253 extern rtx rtx_alloc PARAMS ((RTX_CODE));
1254 extern rtvec rtvec_alloc PARAMS ((int));
1255 extern rtx copy_rtx PARAMS ((rtx));
1258 extern rtx copy_rtx_if_shared PARAMS ((rtx));
1261 extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1262 extern rtx shallow_copy_rtx PARAMS ((rtx));
1263 extern int rtx_equal_p PARAMS ((rtx, rtx));
1266 extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1267 extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1268 extern rtx gen_label_rtx PARAMS ((void));
1269 extern int subreg_hard_regno PARAMS ((rtx, int));
1270 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1271 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
1274 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
1277 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1278 extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1279 enum machine_mode, rtx));
1280 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1281 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
1282 extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1283 enum machine_mode));
1284 extern rtx constant_subword PARAMS ((rtx, int,
1285 enum machine_mode));
1288 extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1289 enum machine_mode));
1290 extern int subreg_lowpart_p PARAMS ((rtx));
1291 extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1292 enum machine_mode));
1293 extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1294 enum machine_mode));
1295 extern rtx make_safe_from PARAMS ((rtx, rtx));
1296 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
1297 extern rtx get_insns PARAMS ((void));
1298 extern const char *get_insn_name PARAMS ((int));
1299 extern rtx get_last_insn PARAMS ((void));
1300 extern rtx get_last_insn_anywhere PARAMS ((void));
1301 extern void start_sequence PARAMS ((void));
1302 extern void push_to_sequence PARAMS ((rtx));
1303 extern void end_sequence PARAMS ((void));
1304 extern void push_to_full_sequence PARAMS ((rtx, rtx));
1305 extern void end_full_sequence PARAMS ((rtx*, rtx*));
1306 extern rtx gen_sequence PARAMS ((void));
1309 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1310 extern rtx mem_for_const_double PARAMS ((rtx));
1311 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
1314 extern rtx get_pool_constant PARAMS ((rtx));
1315 extern rtx get_pool_constant_mark PARAMS ((rtx, bool *));
1316 extern enum machine_mode get_pool_mode PARAMS ((rtx));
1317 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1318 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1319 extern int get_pool_offset PARAMS ((rtx));
1320 extern rtx simplify_subtraction PARAMS ((rtx));
1323 extern rtx assign_stack_local PARAMS ((enum machine_mode,
1324 HOST_WIDE_INT, int));
1325 extern rtx assign_stack_temp PARAMS ((enum machine_mode,
1326 HOST_WIDE_INT, int));
1327 extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode,
1328 HOST_WIDE_INT, int, tree));
1329 extern rtx assign_temp PARAMS ((tree, int, int, int));
1331 extern rtx emit_insn_before PARAMS ((rtx, rtx));
1332 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1333 extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1334 extern rtx emit_barrier_before PARAMS ((rtx));
1335 extern rtx emit_label_before PARAMS ((rtx, rtx));
1336 extern rtx emit_note_before PARAMS ((int, rtx));
1337 extern rtx emit_insn_after PARAMS ((rtx, rtx));
1338 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1339 extern rtx emit_barrier_after PARAMS ((rtx));
1340 extern rtx emit_label_after PARAMS ((rtx, rtx));
1341 extern rtx emit_note_after PARAMS ((int, rtx));
1342 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
1343 extern rtx emit_insn PARAMS ((rtx));
1344 extern rtx emit_insns PARAMS ((rtx));
1345 extern rtx emit_insns_before PARAMS ((rtx, rtx));
1346 extern rtx emit_insns_after PARAMS ((rtx, rtx));
1347 extern rtx emit_jump_insn PARAMS ((rtx));
1348 extern rtx emit_call_insn PARAMS ((rtx));
1349 extern rtx emit_label PARAMS ((rtx));
1350 extern rtx emit_barrier PARAMS ((void));
1351 extern rtx emit_line_note PARAMS ((const char *, int));
1352 extern rtx emit_note PARAMS ((const char *, int));
1353 extern rtx emit_line_note_force PARAMS ((const char *, int));
1354 extern rtx make_insn_raw PARAMS ((rtx));
1355 extern rtx previous_insn PARAMS ((rtx));
1356 extern rtx next_insn PARAMS ((rtx));
1357 extern rtx prev_nonnote_insn PARAMS ((rtx));
1358 extern rtx next_nonnote_insn PARAMS ((rtx));
1359 extern rtx prev_real_insn PARAMS ((rtx));
1360 extern rtx next_real_insn PARAMS ((rtx));
1361 extern rtx prev_active_insn PARAMS ((rtx));
1362 extern rtx next_active_insn PARAMS ((rtx));
1363 extern int active_insn_p PARAMS ((rtx));
1364 extern rtx prev_label PARAMS ((rtx));
1365 extern rtx next_label PARAMS ((rtx));
1366 extern rtx next_cc0_user PARAMS ((rtx));
1367 extern rtx prev_cc0_setter PARAMS ((rtx));
1370 extern rtx next_nondeleted_insn PARAMS ((rtx));
1371 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
1372 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
1373 extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1374 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1375 extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1376 extern void mark_jump_label PARAMS ((rtx, rtx, int));
1377 extern void cleanup_barriers PARAMS ((void));
1380 extern bool squeeze_notes PARAMS ((rtx *, rtx *));
1381 extern rtx delete_related_insns PARAMS ((rtx));
1382 extern void delete_jump PARAMS ((rtx));
1383 extern void delete_barrier PARAMS ((rtx));
1384 extern rtx get_label_before PARAMS ((rtx));
1385 extern rtx get_label_after PARAMS ((rtx));
1386 extern rtx follow_jumps PARAMS ((rtx));
1389 extern rtx *find_constant_term_loc PARAMS ((rtx *));
1392 extern rtx try_split PARAMS ((rtx, rtx, int));
1393 extern int split_branch_probability;
1395 /* In unknown file */
1396 extern rtx split_insns PARAMS ((rtx, rtx));
1398 /* In simplify-rtx.c */
1399 extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1400 enum machine_mode, rtx,
1401 enum machine_mode));
1402 extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1403 enum machine_mode, rtx,
1405 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1407 enum machine_mode, rtx, rtx,
1409 extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1410 enum machine_mode, rtx,
1412 extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1415 extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1416 enum machine_mode, rtx,
1417 enum machine_mode));
1418 extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1422 extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
1426 extern rtx simplify_subreg PARAMS ((enum machine_mode,
1430 extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1434 extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
1435 extern rtx simplify_rtx PARAMS ((rtx));
1436 extern rtx avoid_constant_pool_reference PARAMS ((rtx));
1439 extern rtx gen_mem_addressof PARAMS ((rtx, tree));
1442 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1446 extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
1448 /* Functions in rtlanal.c */
1450 /* Single set is implemented as macro for performance reasons. */
1451 #define single_set(I) (INSN_P (I) \
1452 ? (GET_CODE (PATTERN (I)) == SET \
1453 ? PATTERN (I) : single_set_1 (I)) \
1455 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1457 extern int rtx_addr_can_trap_p PARAMS ((rtx));
1458 extern int rtx_unstable_p PARAMS ((rtx));
1459 extern int rtx_varies_p PARAMS ((rtx, int));
1460 extern int rtx_addr_varies_p PARAMS ((rtx, int));
1461 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1462 extern rtx get_related_value PARAMS ((rtx));
1463 extern rtx get_jump_table_offset PARAMS ((rtx, rtx *));
1464 extern int global_reg_mentioned_p PARAMS ((rtx));
1465 extern int reg_mentioned_p PARAMS ((rtx, rtx));
1466 extern int count_occurrences PARAMS ((rtx, rtx, int));
1467 extern int reg_referenced_p PARAMS ((rtx, rtx));
1468 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1469 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1470 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1471 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
1472 extern int commutative_operand_precedence PARAMS ((rtx));
1473 extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
1474 extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1475 extern int no_labels_between_p PARAMS ((rtx, rtx));
1476 extern int no_jumps_between_p PARAMS ((rtx, rtx));
1477 extern int modified_in_p PARAMS ((rtx, rtx));
1478 extern int insn_dependent_p PARAMS ((rtx, rtx));
1479 extern int reg_set_p PARAMS ((rtx, rtx));
1480 extern rtx single_set_2 PARAMS ((rtx, rtx));
1481 extern int multiple_sets PARAMS ((rtx));
1482 extern int set_noop_p PARAMS ((rtx));
1483 extern int noop_move_p PARAMS ((rtx));
1484 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
1485 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1487 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
1488 extern rtx set_of PARAMS ((rtx, rtx));
1489 extern void note_stores PARAMS ((rtx,
1490 void (*) (rtx, rtx, void *),
1492 extern void note_uses PARAMS ((rtx *,
1493 void (*) (rtx *, void *),
1495 extern rtx reg_set_last PARAMS ((rtx, rtx));
1496 extern int dead_or_set_p PARAMS ((rtx, rtx));
1497 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
1498 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
1499 extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1501 extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
1502 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
1503 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1505 extern int pure_call_p PARAMS ((rtx));
1506 extern void remove_note PARAMS ((rtx, rtx));
1507 extern int side_effects_p PARAMS ((rtx));
1508 extern int volatile_refs_p PARAMS ((rtx));
1509 extern int volatile_insn_p PARAMS ((rtx));
1510 extern int may_trap_p PARAMS ((rtx));
1511 extern int inequality_comparisons_p PARAMS ((rtx));
1512 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
1513 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1515 extern int computed_jump_p PARAMS ((rtx));
1516 typedef int (*rtx_function) PARAMS ((rtx *, void *));
1517 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
1518 extern rtx regno_use_in PARAMS ((unsigned int, rtx));
1519 extern int auto_inc_p PARAMS ((rtx));
1520 extern int in_expr_list_p PARAMS ((rtx, rtx));
1521 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1522 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
1523 extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
1524 extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
1525 extern bool keep_with_call_p PARAMS ((rtx));
1529 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1530 void init_EXPR_INSN_LIST_cache PARAMS ((void));
1531 void free_EXPR_LIST_list PARAMS ((rtx *));
1532 void free_INSN_LIST_list PARAMS ((rtx *));
1533 void free_EXPR_LIST_node PARAMS ((rtx));
1534 void free_INSN_LIST_node PARAMS ((rtx));
1535 rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1536 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
1540 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1541 Always at least 3, since the combiner could put that many togetherm
1542 and we want this to remain correct for all the remaining passes. */
1544 extern int max_parallel;
1546 /* Free up register info memory. */
1547 extern void free_reg_info PARAMS ((void));
1550 extern int asm_noperands PARAMS ((rtx));
1551 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
1553 enum machine_mode *));
1555 extern enum reg_class reg_preferred_class PARAMS ((int));
1556 extern enum reg_class reg_alternate_class PARAMS ((int));
1558 extern rtx get_first_nonparm_insn PARAMS ((void));
1560 extern void split_all_insns PARAMS ((int));
1561 extern void split_all_insns_noflow PARAMS ((void));
1563 #define MAX_SAVED_CONST_INT 64
1564 extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1566 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1567 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1568 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1569 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1570 extern rtx const_true_rtx;
1572 extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1574 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1575 same as VOIDmode. */
1577 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1579 /* Likewise, for the constants 1 and 2. */
1581 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1582 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1584 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1585 is used to represent the frame pointer. This is because the
1586 hard frame pointer and the automatic variables are separated by an amount
1587 that cannot be determined until after register allocation. We can assume
1588 that in this case ELIMINABLE_REGS will be defined, one action of which
1589 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1590 #ifndef HARD_FRAME_POINTER_REGNUM
1591 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1594 /* Index labels for global_rtl. */
1595 enum global_rtl_index
1601 /* For register elimination to work properly these hard_frame_pointer_rtx,
1602 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1603 the same register. */
1604 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1605 GR_ARG_POINTER = GR_FRAME_POINTER,
1607 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1608 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1610 GR_HARD_FRAME_POINTER,
1612 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1613 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1614 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1619 GR_VIRTUAL_INCOMING_ARGS,
1620 GR_VIRTUAL_STACK_ARGS,
1621 GR_VIRTUAL_STACK_DYNAMIC,
1622 GR_VIRTUAL_OUTGOING_ARGS,
1628 /* Pointers to standard pieces of rtx are stored here. */
1629 extern rtx global_rtl[GR_MAX];
1631 /* Standard pieces of rtx, to be substituted directly into things. */
1632 #define pc_rtx (global_rtl[GR_PC])
1633 #define cc0_rtx (global_rtl[GR_CC0])
1635 /* All references to certain hard regs, except those created
1636 by allocating pseudo regs into them (when that's possible),
1637 go through these unique rtx objects. */
1638 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1639 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1640 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1641 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1643 extern rtx pic_offset_table_rtx;
1644 extern rtx struct_value_rtx;
1645 extern rtx struct_value_incoming_rtx;
1646 extern rtx static_chain_rtx;
1647 extern rtx static_chain_incoming_rtx;
1648 extern rtx return_address_pointer_rtx;
1650 /* Include the RTL generation functions. */
1656 /* There are some RTL codes that require special attention; the
1657 generation functions included above do the raw handling. If you
1658 add to this list, modify special_rtx in gengenrtl.c as well. You
1659 should also modify gen_rtx to use the special function. */
1661 extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode,
1662 HOST_WIDE_INT, HOST_WIDE_INT));
1663 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
1664 extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
1665 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
1666 extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
1667 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
1669 extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1671 /* We need the cast here to ensure that we get the same result both with
1672 and without prototypes. */
1673 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1675 /* Virtual registers are used during RTL generation to refer to locations into
1676 the stack frame when the actual location isn't known until RTL generation
1677 is complete. The routine instantiate_virtual_regs replaces these with
1678 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1681 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1683 /* This points to the first word of the incoming arguments passed on the stack,
1684 either by the caller or by the callee when pretending it was passed by the
1687 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1689 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1691 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1692 variable on the stack. Otherwise, it points to the first variable on
1695 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1697 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1699 /* This points to the location of dynamically-allocated memory on the stack
1700 immediately after the stack pointer has been adjusted by the amount
1703 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1705 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1707 /* This points to the location in the stack at which outgoing arguments should
1708 be written when the stack is pre-pushed (arguments pushed using push
1709 insns always use sp). */
1711 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1713 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1715 /* This points to the Canonical Frame Address of the function. This
1716 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1717 but is calculated relative to the arg pointer for simplicity; the
1718 frame pointer nor stack pointer are necessarily fixed relative to
1719 the CFA until after reload. */
1721 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1723 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1725 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1727 /* Nonzero if REGNUM is a pointer into the stack frame. */
1728 #define REGNO_PTR_FRAME_P(REGNUM) \
1729 ((REGNUM) == STACK_POINTER_REGNUM \
1730 || (REGNUM) == FRAME_POINTER_REGNUM \
1731 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1732 || (REGNUM) == ARG_POINTER_REGNUM \
1733 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1734 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1736 /* REGNUM never really appearing in the INSN stream. */
1737 #define INVALID_REGNUM (~(unsigned int) 0)
1739 extern rtx find_next_ref PARAMS ((rtx, rtx));
1741 extern rtx output_constant_def PARAMS ((tree, int));
1742 extern rtx immed_real_const PARAMS ((tree));
1744 /* Define a default value for STORE_FLAG_VALUE. */
1746 #ifndef STORE_FLAG_VALUE
1747 #define STORE_FLAG_VALUE 1
1750 /* Nonzero after the second flow pass has completed.
1751 Set to 1 or 0 by toplev.c */
1752 extern int flow2_completed;
1754 /* Nonzero after end of reload pass.
1755 Set to 1 or 0 by reload1.c. */
1757 extern int reload_completed;
1759 /* Set to 1 while reload_as_needed is operating.
1760 Required by some machines to handle any generated moves differently. */
1762 extern int reload_in_progress;
1764 /* If this is nonzero, we do not bother generating VOLATILE
1765 around volatile memory references, and we are willing to
1766 output indirect addresses. If cse is to follow, we reject
1767 indirect addresses so a useful potential cse is generated;
1768 if it is used only once, instruction combination will produce
1769 the same indirect address eventually. */
1770 extern int cse_not_expected;
1772 /* Set to nonzero before life analysis to indicate that it is unsafe to
1773 generate any new pseudo registers. */
1774 extern int no_new_pseudos;
1776 /* Translates rtx code to tree code, for those codes needed by
1777 REAL_ARITHMETIC. The function returns an int because the caller may not
1778 know what `enum tree_code' means. */
1780 extern int rtx_to_tree_code PARAMS ((enum rtx_code));
1784 extern void gcc_obstack_init PARAMS ((struct obstack *));
1787 struct cse_basic_block_data;
1789 /* Return the right cost to give to an operation
1790 to make the cost of the corresponding register-to-register instruction
1791 N times that of a fast register-to-register instruction. */
1792 #define COSTS_N_INSNS(N) ((N) * 4)
1794 /* Maximum cost of a rtl expression. This value has the special meaning
1795 not to use an rtx with this cost under any circumstances. */
1796 #define MAX_COST INT_MAX
1798 extern int rtx_cost PARAMS ((rtx, enum rtx_code));
1799 extern int address_cost PARAMS ((rtx, enum machine_mode));
1800 extern int delete_trivially_dead_insns PARAMS ((rtx, int));
1802 extern int cse_main PARAMS ((rtx, int, int, FILE *));
1804 extern void cse_end_of_basic_block PARAMS ((rtx,
1805 struct cse_basic_block_data *,
1809 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1810 extern int condjump_p PARAMS ((rtx));
1811 extern int any_condjump_p PARAMS ((rtx));
1812 extern int any_uncondjump_p PARAMS ((rtx));
1813 extern int safe_to_remove_jump_p PARAMS ((rtx));
1814 extern rtx pc_set PARAMS ((rtx));
1815 extern rtx condjump_label PARAMS ((rtx));
1816 extern int simplejump_p PARAMS ((rtx));
1817 extern int returnjump_p PARAMS ((rtx));
1818 extern int onlyjump_p PARAMS ((rtx));
1819 extern int only_sets_cc0_p PARAMS ((rtx));
1820 extern int sets_cc0_p PARAMS ((rtx));
1821 extern int invert_jump_1 PARAMS ((rtx, rtx));
1822 extern int invert_jump PARAMS ((rtx, rtx, int));
1823 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1824 extern int true_regnum PARAMS ((rtx));
1825 extern int redirect_jump_1 PARAMS ((rtx, rtx));
1826 extern int redirect_jump PARAMS ((rtx, rtx, int));
1827 extern void rebuild_jump_labels PARAMS ((rtx));
1828 extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1829 extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1831 extern void delete_for_peephole PARAMS ((rtx, rtx));
1832 extern int condjump_in_parallel_p PARAMS ((rtx));
1833 extern void never_reached_warning PARAMS ((rtx, rtx));
1834 extern void purge_line_number_notes PARAMS ((rtx));
1835 extern void copy_loop_headers PARAMS ((rtx));
1837 /* In emit-rtl.c. */
1838 extern int max_reg_num PARAMS ((void));
1839 extern int max_label_num PARAMS ((void));
1840 extern int get_first_label_num PARAMS ((void));
1841 extern void delete_insns_since PARAMS ((rtx));
1842 extern void mark_reg_pointer PARAMS ((rtx, int));
1843 extern void mark_user_reg PARAMS ((rtx));
1844 extern void reset_used_flags PARAMS ((rtx));
1845 extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1846 extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
1847 extern int get_max_uid PARAMS ((void));
1848 extern int in_sequence_p PARAMS ((void));
1849 extern void force_next_line_note PARAMS ((void));
1850 extern void clear_emit_caches PARAMS ((void));
1851 extern void init_emit PARAMS ((void));
1852 extern void init_emit_once PARAMS ((int));
1853 extern void push_topmost_sequence PARAMS ((void));
1854 extern void pop_topmost_sequence PARAMS ((void));
1855 extern int subreg_realpart_p PARAMS ((rtx));
1856 extern void reverse_comparison PARAMS ((rtx));
1857 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1858 extern void set_new_first_and_last_label_num PARAMS ((int, int));
1859 extern void set_new_last_label_num PARAMS ((int));
1860 extern void unshare_all_rtl_again PARAMS ((rtx));
1861 extern void set_first_insn PARAMS ((rtx));
1862 extern void set_last_insn PARAMS ((rtx));
1863 extern void link_cc0_insns PARAMS ((rtx));
1864 extern void add_insn PARAMS ((rtx));
1865 extern void add_insn_before PARAMS ((rtx, rtx));
1866 extern void add_insn_after PARAMS ((rtx, rtx));
1867 extern void remove_insn PARAMS ((rtx));
1868 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1869 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1870 extern enum rtx_code classify_insn PARAMS ((rtx));
1871 extern rtx emit PARAMS ((rtx));
1872 /* Query and clear/ restore no_line_numbers. This is used by the
1873 switch / case handling in stmt.c to give proper line numbers in
1874 warnings about unreachable code. */
1875 int force_line_numbers PARAMS ((void));
1876 void restore_line_number_status PARAMS ((int old_value));
1877 extern void renumber_insns PARAMS ((FILE *));
1878 extern void remove_unnecessary_notes PARAMS ((void));
1879 extern rtx delete_insn PARAMS ((rtx));
1880 extern void delete_insn_chain PARAMS ((rtx, rtx));
1881 extern rtx delete_insn_and_edges PARAMS ((rtx));
1882 extern void delete_insn_chain_and_edges PARAMS ((rtx, rtx));
1885 extern int combine_instructions PARAMS ((rtx, unsigned int));
1886 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1887 extern rtx remove_death PARAMS ((unsigned int, rtx));
1889 extern void dump_combine_stats PARAMS ((FILE *));
1890 extern void dump_combine_total_stats PARAMS ((FILE *));
1895 extern void schedule_insns PARAMS ((FILE *));
1896 extern void schedule_ebbs PARAMS ((FILE *));
1898 extern void fix_sched_param PARAMS ((const char *, const char *));
1900 /* In print-rtl.c */
1901 extern const char *print_rtx_head;
1902 extern void debug_rtx PARAMS ((rtx));
1903 extern void debug_rtx_list PARAMS ((rtx, int));
1904 extern void debug_rtx_range PARAMS ((rtx, rtx));
1905 extern rtx debug_rtx_find PARAMS ((rtx, int));
1907 extern void print_mem_expr PARAMS ((FILE *, tree));
1908 extern void print_rtl PARAMS ((FILE *, rtx));
1909 extern void print_simple_rtl PARAMS ((FILE *, rtx));
1910 extern int print_rtl_single PARAMS ((FILE *, rtx));
1911 extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
1915 extern void init_loop PARAMS ((void));
1916 extern rtx libcall_other_reg PARAMS ((rtx, rtx));
1918 extern void loop_optimize PARAMS ((rtx, FILE *, int));
1920 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
1923 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1924 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1925 extern int prologue_epilogue_contains PARAMS ((rtx));
1926 extern int sibcall_epilogue_contains PARAMS ((rtx));
1927 extern void preserve_rtl_expr_result PARAMS ((rtx));
1928 extern void mark_temp_addr_taken PARAMS ((rtx));
1929 extern void update_temp_slot_address PARAMS ((rtx, rtx));
1930 extern void purge_addressof PARAMS ((rtx));
1931 extern void purge_hard_subreg_sets PARAMS ((rtx));
1934 extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
1935 extern void expand_null_return PARAMS ((void));
1936 extern void emit_jump PARAMS ((rtx));
1937 extern int preserve_subexpressions_p PARAMS ((void));
1940 extern void move_by_pieces PARAMS ((rtx, rtx,
1941 unsigned HOST_WIDE_INT,
1945 extern void recompute_reg_usage PARAMS ((rtx, int));
1946 extern int initialize_uninitialized_subregs PARAMS ((void));
1947 extern void delete_dead_jumptables PARAMS ((void));
1949 extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1950 extern void dump_flow_info PARAMS ((FILE *));
1954 extern void init_expmed PARAMS ((void));
1955 extern void expand_inc PARAMS ((rtx, rtx));
1956 extern void expand_dec PARAMS ((rtx, rtx));
1957 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
1958 unsigned HOST_WIDE_INT, rtx,
1963 extern int gcse_main PARAMS ((rtx, FILE *));
1967 extern void mark_elimination PARAMS ((int, int));
1969 extern int global_alloc PARAMS ((FILE *));
1970 extern void dump_global_regs PARAMS ((FILE *));
1973 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
1975 extern void build_insn_chain PARAMS ((rtx));
1978 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1979 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1980 extern void globalize_reg PARAMS ((int));
1981 extern void init_regs PARAMS ((void));
1982 extern void init_reg_sets PARAMS ((void));
1983 extern void regset_release_memory PARAMS ((void));
1984 extern void regclass_init PARAMS ((void));
1985 extern void regclass PARAMS ((rtx, int, FILE *));
1986 extern void reg_scan PARAMS ((rtx, unsigned int, int));
1987 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
1988 extern void fix_register PARAMS ((const char *, int, int));
1990 extern void delete_null_pointer_checks PARAMS ((rtx));
1994 extern void regmove_optimize PARAMS ((rtx, int, FILE *));
1996 extern void combine_stack_adjustments PARAMS ((void));
2000 extern void dbr_schedule PARAMS ((rtx, FILE *));
2003 /* In local-alloc.c */
2005 extern void dump_local_alloc PARAMS ((FILE *));
2007 extern int local_alloc PARAMS ((void));
2008 extern int function_invariant_p PARAMS ((rtx));
2011 extern void init_branch_prob PARAMS ((const char *));
2012 extern void branch_prob PARAMS ((void));
2013 extern void end_branch_prob PARAMS ((void));
2014 extern void output_func_start_profiler PARAMS ((void));
2016 /* In reg-stack.c */
2018 extern void reg_to_stack PARAMS ((rtx, FILE *));
2021 /* In fold-const.c */
2022 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2023 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2024 unsigned HOST_WIDE_INT *,
2026 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2027 unsigned HOST_WIDE_INT *,
2029 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
2031 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2032 unsigned HOST_WIDE_INT *,
2034 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2035 HOST_WIDE_INT, unsigned int,
2036 unsigned HOST_WIDE_INT *,
2037 HOST_WIDE_INT *, int));
2038 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2039 HOST_WIDE_INT, unsigned int,
2040 unsigned HOST_WIDE_INT *,
2041 HOST_WIDE_INT *, int));
2042 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2043 HOST_WIDE_INT, unsigned int,
2044 unsigned HOST_WIDE_INT *,
2046 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2047 HOST_WIDE_INT, unsigned int,
2048 unsigned HOST_WIDE_INT *,
2057 LCT_CONST_MAKE_BLOCK = 3,
2058 LCT_PURE_MAKE_BLOCK = 4,
2061 LCT_ALWAYS_RETURN = 7,
2062 LCT_RETURNS_TWICE = 8
2065 extern void emit_library_call PARAMS ((rtx, enum libcall_type,
2066 enum machine_mode, int,
2068 extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
2069 enum machine_mode, int,
2073 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
2076 extern int in_data_section PARAMS ((void));
2077 extern void init_varasm_once PARAMS ((void));
2080 extern void init_rtl PARAMS ((void));
2081 extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
2083 struct md_constant { char *name, *value; };
2086 extern int read_skip_spaces PARAMS ((FILE *));
2087 extern rtx read_rtx PARAMS ((FILE *));
2090 extern const char *read_rtx_filename;
2091 extern int read_rtx_lineno;
2093 /* Redefine abort to report an internal error w/o coredump, and
2094 reporting the location of the error in the source file. This logic
2095 is duplicated in rtl.h and tree.h because every file that needs the
2096 special abort includes one or both. toplev.h gets too few files,
2097 system.h gets too many. */
2099 extern void fancy_abort PARAMS ((const char *, int, const char *))
2101 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2104 extern void clear_reg_alias_info PARAMS ((rtx));
2105 extern rtx canon_rtx PARAMS ((rtx));
2106 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2107 int (*)(rtx, int)));
2108 extern rtx get_addr PARAMS ((rtx));
2109 extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2110 rtx, int (*)(rtx, int)));
2111 extern int read_dependence PARAMS ((rtx, rtx));
2112 extern int anti_dependence PARAMS ((rtx, rtx));
2113 extern int output_dependence PARAMS ((rtx, rtx));
2114 extern void mark_constant_function PARAMS ((void));
2115 extern void init_alias_once PARAMS ((void));
2116 extern void init_alias_analysis PARAMS ((void));
2117 extern void end_alias_analysis PARAMS ((void));
2118 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
2122 sibcall_use_normal = 1,
2123 sibcall_use_tail_recursion,
2127 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2128 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2131 extern int stack_regs_mentioned PARAMS ((rtx insn));
2135 extern rtx stack_limit_rtx;
2137 /* In regrename.c */
2138 extern void regrename_optimize PARAMS ((void));
2139 extern void copyprop_hardreg_forward PARAMS ((void));
2142 extern void if_convert PARAMS ((int));
2145 extern void invert_br_probabilities PARAMS ((rtx));
2146 extern bool expensive_function_p PARAMS ((int));
2147 #endif /* ! GCC_RTL_H */