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 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
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. */
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 int rtx_length[];
55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
57 extern const char * const rtx_name[];
58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
60 extern const char * const rtx_format[];
61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
63 extern const char rtx_class[];
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 after the ADDR_DIFF_VEC. */
75 unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
76 unsigned min_after_base: 1; /* minimum address target label is after BASE. */
77 unsigned max_after_base: 1; /* maximum address target label is after BASE. */
78 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
79 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
82 } addr_diff_vec_flags;
84 /* Common union for an element of an rtx. */
86 typedef union rtunion_def
93 struct rtvec_def *rtvec;
94 enum machine_mode rttype;
95 addr_diff_vec_flags rt_addr_diff_vec_flags;
96 struct cselib_val_struct *rt_cselib;
97 struct bitmap_head_def *rtbit;
98 union tree_node *rttree;
99 struct basic_block_def *bb;
102 /* RTL expression ("rtx"). */
104 typedef struct rtx_def
106 #ifdef ONLY_INT_FIELDS
107 #ifdef CODE_FIELD_BUG
108 unsigned int code : 16;
113 /* The kind of expression this is. */
114 enum rtx_code code : 16;
117 /* The kind of value the expression has. */
118 #ifdef ONLY_INT_FIELDS
121 enum machine_mode mode : 8;
123 /* 1 in an INSN if it can alter flow of control
124 within this function.
125 LINK_COST_ZERO in an INSN_LIST. */
126 unsigned int jump : 1;
127 /* 1 in an INSN if it can call another function.
128 LINK_COST_FREE in an INSN_LIST. */
129 unsigned int call : 1;
130 /* 1 in a MEM or REG if value of this expression will never change
131 during the current function, even though it is not
133 1 in a SUBREG if it is from a promoted variable that is unsigned.
134 1 in a SYMBOL_REF if it addresses something in the per-function
136 1 in a CALL_INSN if it is a const call.
137 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
138 reorg until end of compilation; cleared before used. */
139 unsigned int unchanging : 1;
140 /* 1 in a MEM expression if contents of memory are volatile.
141 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
143 1 in a REG expression if corresponds to a variable declared by the user.
144 0 for an internally generated temporary.
145 In a SYMBOL_REF, this flag is used for machine-specific purposes.
146 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
147 unsigned int volatil : 1;
148 /* 1 in a MEM referring to a field of an aggregate.
149 0 if the MEM was a variable or the result of a * operator in C;
150 1 if it was the result of a . or -> operator (on a struct) in C.
151 1 in a REG if the register is used only in exit code a loop.
152 1 in a SUBREG expression if was generated from a variable with a
154 1 in a CODE_LABEL if the label is used for nonlocal gotos
155 and must not be deleted even if its count is zero.
156 1 in a LABEL_REF if this is a reference to a label outside the
158 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
159 together with the preceding insn. Valid only within sched.
160 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
161 from the target of a branch. Valid from reorg until end of compilation;
162 cleared before used. */
163 unsigned int in_struct : 1;
164 /* 1 if this rtx is used. This is used for copying shared structure.
165 See `unshare_all_rtl'.
166 In a REG, this is not needed for that purpose, and used instead
167 in `leaf_renumber_regs_insn'.
168 In a SYMBOL_REF, means that emit_library_call
169 has used it as the function. */
170 unsigned int used : 1;
171 /* Nonzero if this rtx came from procedure integration.
172 In a REG, nonzero means this reg refers to the return value
173 of the current function. */
174 unsigned integrated : 1;
175 /* 1 in an INSN or a SET if this rtx is related to the call frame,
176 either changing how we compute the frame address or saving and
177 restoring registers in the prologue and epilogue.
178 1 in a MEM if the MEM refers to a scalar, rather than a member of
180 unsigned frame_related : 1;
182 /* The first element of the operands of this rtx.
183 The number of operands and their types are controlled
184 by the `code' field, according to rtl.def. */
188 #define NULL_RTX (rtx) 0
190 /* Define macros to access the `code' field of the rtx. */
192 #ifdef SHORT_ENUM_BUG
193 #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
194 #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
196 #define GET_CODE(RTX) ((RTX)->code)
197 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
200 #define GET_MODE(RTX) ((RTX)->mode)
201 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
203 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
204 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
205 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
207 /* RTL vector. These appear inside RTX's when there is a need
208 for a variable number of things. The principle use is inside
209 PARALLEL expressions. */
211 typedef struct rtvec_def{
212 int num_elem; /* number of elements */
213 struct rtx_def *elem[1];
216 #define NULL_RTVEC (rtvec) 0
218 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
219 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
221 /* 1 if X is a REG. */
223 #define REG_P(X) (GET_CODE (X) == REG)
225 /* 1 if X is a constant value that is an integer. */
227 #define CONSTANT_P(X) \
228 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
229 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
230 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
231 || GET_CODE (X) == CONSTANT_P_RTX)
233 /* General accessor macros for accessing the fields of an rtx. */
235 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
236 /* The bit with a star outside the statement expr and an & inside is
237 so that N can be evaluated only once. */
238 #define RTL_CHECK1(RTX, N, C1) \
239 (*({ rtx _rtx = (RTX); int _n = (N); \
240 enum rtx_code _code = GET_CODE (_rtx); \
241 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
242 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
243 __PRETTY_FUNCTION__); \
244 if (GET_RTX_FORMAT(_code)[_n] != C1) \
245 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
246 __PRETTY_FUNCTION__); \
249 #define RTL_CHECK2(RTX, N, C1, C2) \
250 (*({ rtx _rtx = (RTX); int _n = (N); \
251 enum rtx_code _code = GET_CODE (_rtx); \
252 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
253 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
254 __PRETTY_FUNCTION__); \
255 if (GET_RTX_FORMAT(_code)[_n] != C1 \
256 && GET_RTX_FORMAT(_code)[_n] != C2) \
257 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
258 __PRETTY_FUNCTION__); \
261 #define RTL_CHECKC1(RTX, N, C) \
262 (*({ rtx _rtx = (RTX); int _n = (N); \
263 if (GET_CODE (_rtx) != C) \
264 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, \
265 __PRETTY_FUNCTION__); \
268 #define RTL_CHECKC2(RTX, N, C1, C2) \
269 (*({ rtx _rtx = (RTX); int _n = (N); \
270 enum rtx_code _code = GET_CODE (_rtx); \
271 if (_code != C1 && _code != C2) \
272 rtl_check_failed_code2 (_rtx, C1, C2, __FILE__, __LINE__, \
273 __PRETTY_FUNCTION__); \
276 #define RTVEC_ELT(RTVEC, I) \
277 (*({ rtvec _rtvec = (RTVEC); int _i = (I); \
278 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
279 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
280 __PRETTY_FUNCTION__); \
281 &_rtvec->elem[_i]; }))
283 extern void rtl_check_failed_bounds PARAMS ((rtx, int,
284 const char *, int, const char *))
286 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
287 const char *, int, const char *))
289 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
290 const char *, int, const char *))
292 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
293 const char *, int, const char *))
295 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
296 const char *, int, const char *))
298 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
299 const char *, int, const char *))
302 #else /* not ENABLE_RTL_CHECKING */
304 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
305 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
306 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
307 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
308 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
312 #define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
313 #define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
314 #define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
315 #define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
316 #define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
317 #define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
318 #define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
319 #define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
320 #define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
322 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
323 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
325 /* These are like XWINT, etc. except that they expect a '0' field instead
326 of the normal type code. */
328 #define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
329 #define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
330 #define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
331 #define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
332 #define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
333 #define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
334 #define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
335 #define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
336 #define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
337 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
338 #define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
340 #define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
341 #define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
342 #define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
343 #define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
344 #define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
345 #define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
346 #define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
347 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
348 #define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
349 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
350 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
351 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
353 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
354 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
356 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
358 /* ACCESS MACROS for particular fields of insns. */
360 /* Holds a unique number for each insn.
361 These are not necessarily sequentially increasing. */
362 #define INSN_UID(INSN) XINT(INSN, 0)
364 /* Chain insns together in sequence. */
365 #define PREV_INSN(INSN) XEXP(INSN, 1)
366 #define NEXT_INSN(INSN) XEXP(INSN, 2)
368 /* The body of an insn. */
369 #define PATTERN(INSN) XEXP(INSN, 3)
371 /* Code number of instruction, from when it was recognized.
372 -1 means this instruction has not been recognized yet. */
373 #define INSN_CODE(INSN) XINT(INSN, 4)
375 /* Set up in flow.c; empty before then.
376 Holds a chain of INSN_LIST rtx's whose first operands point at
377 previous insns with direct data-flow connections to this one.
378 That means that those insns set variables whose next use is in this insn.
379 They are always in the same basic block as this insn. */
380 #define LOG_LINKS(INSN) XEXP(INSN, 5)
382 /* 1 if insn has been deleted. */
383 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
385 /* 1 if insn is a call to a const function. */
386 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
388 /* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
389 #define SIBLING_CALL_P(INSN) ((INSN)->jump)
391 /* 1 if insn is a branch that should not unconditionally execute its
392 delay slots, i.e., it is an annulled branch. */
393 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
395 /* 1 if insn is in a delay slot and is from the target of the branch. If
396 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
397 executed if the branch is taken. For annulled branches with this bit
398 clear, the insn should be executed only if the branch is not taken. */
399 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
401 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
403 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
405 /* Holds a list of notes on what this insn does to various REGs.
406 It is a chain of EXPR_LIST rtx's, where the second operand is the
407 chain pointer and the first operand is the REG being described.
408 The mode field of the EXPR_LIST contains not a real machine mode
409 but a value from enum reg_note. */
411 #define REG_NOTES(INSN) XEXP(INSN, 6)
413 /* Don't forget to change reg_note_name in rtl.c. */
416 /* The value in REG dies in this insn (i.e., it is not needed past
417 this insn). If REG is set in this insn, the REG_DEAD note may,
418 but need not, be omitted. */
421 /* The REG is autoincremented or autodecremented. */
424 /* Describes the insn as a whole; it says that the insn sets a register
425 to a constant value or to be equivalent to a memory address. If the
426 register is spilled to the stack then the constant value should be
427 substituted for it. The contents of the REG_EQUIV is the constant
428 value or memory address, which may be different from the source of
429 the SET although it has the same value. A REG_EQUIV note may also
430 appear on an insn which copies a register parameter to a pseudo-register,
431 if there is a memory address which could be used to hold that
432 pseudo-register throughout the function. */
435 /* Like REG_EQUIV except that the destination is only momentarily equal
436 to the specified rtx. Therefore, it cannot be used for substitution;
437 but it can be used for cse. */
440 /* The register set in this insn held 0 before the insn. The contents of
441 the note is the insn that stored the 0. If that insn is deleted or
442 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
443 is actually an INSN_LIST, not an EXPR_LIST. */
446 /* This insn copies the return-value of a library call out of the hard reg
447 for return values. This note is actually an INSN_LIST and it points to
448 the first insn involved in setting up arguments for the call. flow.c
449 uses this to delete the entire library call when its result is dead. */
452 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
453 and points at the one that has the REG_RETVAL. */
456 /* The register is always nonnegative during the containing loop. This is
457 used in branches so that decrement and branch instructions terminating
458 on zero can be matched. There must be an insn pattern in the md file
459 named `decrement_and_branch_until_zero' or else this will never be added
460 to any instructions. */
463 /* There is no conflict *after this insn* between the register in the note
464 and the destination of this insn. */
467 /* Identifies a register set in this insn and never used. */
470 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
471 respectively. Normally, these are required to be consecutive insns, but
472 we permit putting a cc0-setting insn in the delay slot of a branch as
473 long as only one copy of the insn exists. In that case, these notes
474 point from one to the other to allow code generation to determine what
475 any require information and to properly update CC_STATUS. */
476 REG_CC_SETTER, REG_CC_USER,
478 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
479 CODE_LABEL contained in the REG_LABEL note is used by the insn. */
482 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
483 write-after-read and write-after-write dependencies respectively.
484 Data dependencies, which are the only type of LOG_LINK created by
485 flow, are represented by a 0 reg note kind. */
486 REG_DEP_ANTI, REG_DEP_OUTPUT,
488 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
489 -fbranch-probabilities is given. It has an integer value. For jumps,
490 it is the probability that this is a taken branch. For calls, it is
491 the probability that this call won't return. */
494 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
495 the first insn after each CALL_INSN. It indicates how many times this
496 block was executed. */
499 /* Attached to a call insn; indicates that the call is malloc-like and
500 that the pointer returned cannot alias anything else. */
503 /* Used to optimize rtl generated by dynamic stack allocations for targets
504 where SETJMP_VIA_SAVE_AREA is true. */
507 /* Attached to JUMP_INSNs only, it holds the branch prediction flags
508 computed by get_jump_flags() after dbr scheduling is complete. */
511 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
512 for DWARF to interpret what they imply. The attached rtx is used
513 instead of intuition. */
514 REG_FRAME_RELATED_EXPR,
516 /* Indicates that REG holds the exception context for the function.
517 This context is shared by inline functions, so the code to acquire
518 the real exception context is delayed until after inlining. */
521 /* Indicates what exception region an INSN belongs in. This is used to
522 indicate what region to which a call may throw. REGION 0 indicates
523 that a call cannot throw at all. REGION -1 indicates that it cannot
524 throw, nor will it execute a non-local goto. */
527 /* Indicates that a call is actually a call to rethrow, and specifies the
528 rethrow symbol for the region the rethrow is targetting. This provides
529 a way to generate the non standard flow edges required for a rethrow. */
532 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
536 /* The base value for branch probability notes. */
537 #define REG_BR_PROB_BASE 10000
539 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
540 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
541 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
543 /* Names for REG_NOTE's in EXPR_LIST insn's. */
545 extern const char * const reg_note_name[];
546 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
548 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
549 USE and CLOBBER expressions.
550 USE expressions list the registers filled with arguments that
551 are passed to the function.
552 CLOBBER expressions document the registers explicitly clobbered
554 Pseudo registers can not be mentioned in this list. */
555 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
557 /* The label-number of a code-label. The assembler label
558 is made from `L' and the label-number printed in decimal.
559 Label numbers are unique in a compilation. */
560 #define CODE_LABEL_NUMBER(INSN) XINT(INSN, 3)
562 #define LINE_NUMBER NOTE
564 /* In a NOTE that is a line number, this is a string for the file name that the
565 line is in. We use the same field to record block numbers temporarily in
566 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
567 between ints and pointers if we use a different macro for the block number.)
568 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
569 information as a rtx in the field. */
571 #define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
572 #define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
573 #define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
574 #define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
575 #define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
576 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
578 /* In a NOTE that is a line number, this is the line number.
579 Other kinds of NOTEs are identified by negative numbers here. */
580 #define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
582 /* Codes that appear in the NOTE_LINE_NUMBER field
583 for kinds of notes that are not line numbers.
585 Notice that we do not try to use zero here for any of
586 the special note codes because sometimes the source line
587 actually can be zero! This happens (for example) when we
588 are generating code for the per-translation-unit constructor
589 and destructor routines for some C++ translation unit.
591 If you should change any of the following values, or if you
592 should add a new value here, don't forget to change the
593 note_insn_name array in rtl.c. */
595 /* This note is used to get rid of an insn
596 when it isn't safe to patch the insn out of the chain. */
597 #define NOTE_INSN_DELETED -1
598 #define NOTE_INSN_BLOCK_BEG -2
599 #define NOTE_INSN_BLOCK_END -3
600 #define NOTE_INSN_LOOP_BEG -4
601 #define NOTE_INSN_LOOP_END -5
602 /* This kind of note is generated at the end of the function body,
603 just before the return insn or return label.
604 In an optimizing compilation it is deleted by the first jump optimization,
605 after enabling that optimizer to determine whether control can fall
606 off the end of the function body without a return statement. */
607 #define NOTE_INSN_FUNCTION_END -6
608 /* This kind of note is generated just after each call to `setjmp', et al. */
609 #define NOTE_INSN_SETJMP -7
610 /* Generated at the place in a loop that `continue' jumps to. */
611 #define NOTE_INSN_LOOP_CONT -8
612 /* Generated at the start of a duplicated exit test. */
613 #define NOTE_INSN_LOOP_VTOP -9
614 /* This marks the point immediately after the last prologue insn. */
615 #define NOTE_INSN_PROLOGUE_END -10
616 /* This marks the point immediately prior to the first epilogue insn. */
617 #define NOTE_INSN_EPILOGUE_BEG -11
618 /* Generated in place of user-declared labels when they are deleted. */
619 #define NOTE_INSN_DELETED_LABEL -12
620 /* This note indicates the start of the real body of the function,
621 i.e. the point just after all of the parms have been moved into
623 #define NOTE_INSN_FUNCTION_BEG -13
624 /* These note where exception handling regions begin and end. */
625 #define NOTE_INSN_EH_REGION_BEG -14
626 #define NOTE_INSN_EH_REGION_END -15
627 /* Generated whenever a duplicate line number note is output. For example,
628 one is output after the end of an inline function, in order to prevent
629 the line containing the inline call from being counted twice in gcov. */
630 #define NOTE_REPEATED_LINE_NUMBER -16
632 /* Start/end of a live range region, where pseudos allocated on the stack can
633 be allocated to temporary registers. */
634 #define NOTE_INSN_RANGE_START -17
635 #define NOTE_INSN_RANGE_END -18
636 /* Record which registers are currently live. */
637 #define NOTE_INSN_LIVE -19
638 /* Record the struct for the following basic block. */
639 #define NOTE_INSN_BASIC_BLOCK -20
641 /* Names for NOTE insn's other than line numbers. */
643 extern const char * const note_insn_name[];
644 #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
646 /* The name of a label, in case it corresponds to an explicit label
647 in the input source code. */
648 #define LABEL_NAME(RTX) XCSTR(RTX, 4, CODE_LABEL)
650 /* In jump.c, each label contains a count of the number
651 of LABEL_REFs that point at it, so unused labels can be deleted. */
652 #define LABEL_NUSES(RTX) XCINT(RTX, 5, CODE_LABEL)
654 /* Associate a name with a CODE_LABEL. */
655 #define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
657 /* The original regno this ADDRESSOF was built for. */
658 #define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
660 /* The variable in the register we took the address of. */
661 #define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
663 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
664 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
665 be decremented and possibly the label can be deleted. */
666 #define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
668 /* Once basic blocks are found in flow.c,
669 each CODE_LABEL starts a chain that goes through
670 all the LABEL_REFs that jump to that label.
671 The chain eventually winds up at the CODE_LABEL; it is circular. */
672 #define LABEL_REFS(LABEL) XCEXP(LABEL, 6, CODE_LABEL)
674 /* This is the field in the LABEL_REF through which the circular chain
675 of references to a particular label is linked.
676 This chain is set up in flow.c. */
678 #define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
680 /* Once basic blocks are found in flow.c,
681 Each LABEL_REF points to its containing instruction with this field. */
683 #define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
685 /* For a REG rtx, REGNO extracts the register number. */
687 #define REGNO(RTX) XCUINT(RTX, 0, REG)
689 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
690 is the current function's return value. */
692 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
694 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
695 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
697 /* For a CONST_INT rtx, INTVAL extracts the integer. */
699 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
701 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
702 SUBREG_WORD extracts the word-number. */
704 #define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
705 #define SUBREG_WORD(RTX) XCUINT(RTX, 1, SUBREG)
707 /* 1 if the REG contained in SUBREG_REG is already known to be
708 sign- or zero-extended from the mode of the SUBREG to the mode of
709 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
712 When used as a LHS, is means that this extension must be done
713 when assigning to SUBREG_REG. */
715 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
716 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
718 /* Access various components of an ASM_OPERANDS rtx. */
720 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
721 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
722 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
723 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
724 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
725 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
726 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
727 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
728 #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
729 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
730 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
732 /* For a MEM rtx, 1 if it's a volatile reference.
733 Also in an ASM_OPERANDS rtx. */
734 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
736 /* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero,
737 RTX may or may not refer to a field of an aggregate. */
738 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
740 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
741 not refer to a scalar.*/
742 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
744 /* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P
745 attributes from RHS to LHS. */
746 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
747 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
748 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
749 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS))
751 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
752 RTX. Otherwise, vice versa. Use this macro only when you are
753 *sure* that you know that the MEM is in a structure, or is a
754 scalar. VAL is evaluated only once. */
755 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
756 ((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \
757 : (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1))
759 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
760 set, and may alias anything. Otherwise, the MEM can only alias
761 MEMs in the same alias set. This value is set in a
762 language-dependent manner in the front-end, and should not be
763 altered in the back-end. These set numbers are tested for zero,
764 and compared for equality; they have no other significance. In
765 some front-ends, these numbers may correspond in some way to types,
766 or other language-level entities, but they need not, and the
767 back-end makes no such assumptions. */
768 #define MEM_ALIAS_SET(RTX) XCINT(RTX, 1, MEM)
770 /* For a LABEL_REF, 1 means that this reference is to a label outside the
771 loop containing the reference. */
772 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
774 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
775 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
776 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
778 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
779 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
781 /* For a REG, 1 means the register is used only in an exit test of a loop. */
782 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
784 /* During sched, for an insn, 1 means that the insn must be scheduled together
785 with the preceding insn. */
786 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
788 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
789 cost of the dependence link. The cost of executing an instruction
790 may vary based on how the results are used. LINK_COST_ZERO is 1 when
791 the cost through the link varies and is unchanged (i.e., the link has
792 zero additional cost). LINK_COST_FREE is 1 when the cost through the
793 link is zero (i.e., the link makes the cost free). In other cases,
794 the adjustment to the cost is recomputed each time it is needed. */
795 #define LINK_COST_ZERO(X) ((X)->jump)
796 #define LINK_COST_FREE(X) ((X)->call)
798 /* For a SET rtx, SET_DEST is the place that is set
799 and SET_SRC is the value it is set to. */
800 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
801 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
803 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
804 #define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
805 #define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
807 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
808 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
810 /* Flag in a SYMBOL_REF for machine-specific purposes. */
811 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
813 /* 1 in a SYMBOL_REF if it represents a symbol which might have to change
814 if its inlined or unrolled. */
815 #define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
817 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
818 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
820 /* Define a macro to look for REG_INC notes,
821 but save time on machines where they never exist. */
823 /* Don't continue this line--convex cc version 4.1 would lose. */
824 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
825 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
827 #define FIND_REG_INC_NOTE(insn, reg) 0
830 /* Indicate whether the machine has any sort of auto increment addressing.
831 If not, we can avoid checking for REG_INC notes. */
833 /* Don't continue this line--convex cc version 4.1 would lose. */
834 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
838 #ifndef HAVE_PRE_INCREMENT
839 #define HAVE_PRE_INCREMENT 0
842 #ifndef HAVE_PRE_DECREMENT
843 #define HAVE_PRE_DECREMENT 0
846 #ifndef HAVE_POST_INCREMENT
847 #define HAVE_POST_INCREMENT 0
850 #ifndef HAVE_POST_DECREMENT
851 #define HAVE_POST_DECREMENT 0
855 /* Some architectures do not have complete pre/post increment/decrement
856 instruction sets, or only move some modes efficiently. These macros
857 allow us to tune autoincrement generation. */
859 #ifndef USE_LOAD_POST_INCREMENT
860 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
863 #ifndef USE_LOAD_POST_DECREMENT
864 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
867 #ifndef USE_LOAD_PRE_INCREMENT
868 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
871 #ifndef USE_LOAD_PRE_DECREMENT
872 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
875 #ifndef USE_STORE_POST_INCREMENT
876 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
879 #ifndef USE_STORE_POST_DECREMENT
880 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
883 #ifndef USE_STORE_PRE_INCREMENT
884 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
887 #ifndef USE_STORE_PRE_DECREMENT
888 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
892 /* Accessors for RANGE_INFO. */
893 /* For RANGE_{START,END} notes return the RANGE_START note. */
894 #define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
896 /* For RANGE_{START,END} notes return the RANGE_START note. */
897 #define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
899 /* For RANGE_{START,END} notes, return the vector containing the registers used
901 #define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
902 #define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
903 #define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
905 /* For RANGE_{START,END} notes, the number of calls within the range. */
906 #define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
908 /* For RANGE_{START,END} notes, the number of insns within the range. */
909 #define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
911 /* For RANGE_{START,END} notes, a unique # to identify this range. */
912 #define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
914 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
915 #define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
917 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
918 #define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
920 /* For RANGE_{START,END} notes, the loop depth the range is in. */
921 #define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
923 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
925 #define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
927 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
929 #define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
931 /* For RANGE_START notes, the marker # of the start of the range. */
932 #define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
934 /* For RANGE_START notes, the marker # of the end of the range. */
935 #define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
937 /* Original pseudo register # for a live range note. */
938 #define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
940 /* Pseudo register # original register is copied into or -1. */
941 #define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
943 /* How many times a register in a live range note was referenced. */
944 #define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
946 /* How many times a register in a live range note was set. */
947 #define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
949 /* How many times a register in a live range note died. */
950 #define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
952 /* Whether the original value is needed to be copied into the range register at
953 the start of the range. */
954 #define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
956 /* # of insns the register copy is live over. */
957 #define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
959 /* # of calls the register copy is live over. */
960 #define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
962 /* DECL_NODE pointer of the declaration if the register is a user defined
964 #define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
966 /* BLOCK_NODE pointer to the block the variable is declared in if the
967 register is a user defined variable. */
968 #define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
970 /* EXPR_LIST of the distinct ranges a variable is in. */
971 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
973 /* Block a variable is declared in. */
974 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
976 /* # of distinct ranges a variable is in. */
977 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
979 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
980 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
982 /* For a NOTE_INSN_LIVE note, the original basic block number. */
983 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
985 /* Nonzero if we need to distinguish between the return value of this function
986 and the return value of a function called by this function. This helps
988 This is 1 until after the rtl generation pass. */
989 extern int rtx_equal_function_value_matters;
991 /* Generally useful functions. */
993 /* The following functions accept a wide integer argument. Rather than
994 having to cast on every function call, we use a macro instead, that is
995 defined here and in tree.h. */
998 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
999 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
1001 extern int exact_log2_wide PARAMS ((unsigned HOST_WIDE_INT));
1002 extern int floor_log2_wide PARAMS ((unsigned HOST_WIDE_INT));
1005 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
1007 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1009 #define plus_constant_for_output(X,C) \
1010 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
1013 extern void set_stack_check_libfunc PARAMS ((rtx));
1014 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
1015 enum machine_mode));
1016 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1017 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1018 extern void optimize_save_area_alloca PARAMS ((rtx));
1020 extern rtx gen_rtx PARAMS ((enum rtx_code,
1021 enum machine_mode, ...));
1022 extern rtvec gen_rtvec PARAMS ((int, ...));
1024 extern char *oballoc PARAMS ((int));
1025 extern char *permalloc PARAMS ((int));
1026 extern rtx rtx_alloc PARAMS ((RTX_CODE));
1027 extern rtvec rtvec_alloc PARAMS ((int));
1028 extern rtx copy_insn_1 PARAMS ((rtx));
1029 extern rtx copy_insn PARAMS ((rtx));
1030 extern rtx copy_rtx PARAMS ((rtx));
1031 extern rtx copy_rtx_if_shared PARAMS ((rtx));
1032 extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1033 extern rtx shallow_copy_rtx PARAMS ((rtx));
1034 extern int rtx_equal_p PARAMS ((rtx, rtx));
1035 extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1036 extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1037 extern rtx gen_label_rtx PARAMS ((void));
1038 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1039 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
1040 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
1041 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1042 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1043 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
1044 extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1045 enum machine_mode));
1046 extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1047 enum machine_mode));
1048 extern int subreg_lowpart_p PARAMS ((rtx));
1049 extern rtx make_safe_from PARAMS ((rtx, rtx));
1050 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
1051 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1052 extern rtx get_insns PARAMS ((void));
1053 extern const char *get_insn_name PARAMS ((int));
1054 extern rtx get_last_insn PARAMS ((void));
1055 extern rtx get_last_insn_anywhere PARAMS ((void));
1056 extern void start_sequence PARAMS ((void));
1057 extern void push_to_sequence PARAMS ((rtx));
1058 extern void end_sequence PARAMS ((void));
1059 extern void push_to_full_sequence PARAMS ((rtx, rtx));
1060 extern void end_full_sequence PARAMS ((rtx*, rtx*));
1061 extern rtx gen_sequence PARAMS ((void));
1062 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1063 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
1064 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1065 extern rtx get_pool_constant PARAMS ((rtx));
1066 extern enum machine_mode get_pool_mode PARAMS ((rtx));
1067 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1068 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1069 extern int get_pool_offset PARAMS ((rtx));
1070 extern rtx simplify_subtraction PARAMS ((rtx));
1071 extern rtx assign_stack_local PARAMS ((enum machine_mode,
1072 HOST_WIDE_INT, int));
1073 extern rtx assign_stack_temp PARAMS ((enum machine_mode,
1074 HOST_WIDE_INT, int));
1075 extern rtx assign_temp PARAMS ((union tree_node *,
1077 extern rtx protect_from_queue PARAMS ((rtx, int));
1078 extern void emit_queue PARAMS ((void));
1079 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1080 extern rtx emit_insn_before PARAMS ((rtx, rtx));
1081 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1082 extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1083 extern rtx emit_barrier_before PARAMS ((rtx));
1084 extern rtx emit_label_before PARAMS ((rtx, rtx));
1085 extern rtx emit_note_before PARAMS ((int, rtx));
1086 extern rtx emit_insn_after PARAMS ((rtx, rtx));
1087 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1088 extern rtx emit_barrier_after PARAMS ((rtx));
1089 extern rtx emit_label_after PARAMS ((rtx, rtx));
1090 extern rtx emit_note_after PARAMS ((int, rtx));
1091 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
1092 extern rtx emit_insn PARAMS ((rtx));
1093 extern rtx emit_insns PARAMS ((rtx));
1094 extern rtx emit_insns_before PARAMS ((rtx, rtx));
1095 extern rtx emit_insns_after PARAMS ((rtx, rtx));
1096 extern rtx emit_jump_insn PARAMS ((rtx));
1097 extern rtx emit_call_insn PARAMS ((rtx));
1098 extern rtx emit_label PARAMS ((rtx));
1099 extern rtx emit_barrier PARAMS ((void));
1100 extern rtx emit_line_note PARAMS ((const char *, int));
1101 extern rtx emit_note PARAMS ((const char *, int));
1102 extern rtx emit_line_note_force PARAMS ((const char *, int));
1103 extern rtx make_insn_raw PARAMS ((rtx));
1104 extern rtx previous_insn PARAMS ((rtx));
1105 extern rtx next_insn PARAMS ((rtx));
1106 extern rtx prev_nonnote_insn PARAMS ((rtx));
1107 extern rtx next_nonnote_insn PARAMS ((rtx));
1108 extern rtx prev_real_insn PARAMS ((rtx));
1109 extern rtx next_real_insn PARAMS ((rtx));
1110 extern rtx prev_active_insn PARAMS ((rtx));
1111 extern rtx next_active_insn PARAMS ((rtx));
1112 extern int active_insn_p PARAMS ((rtx));
1113 extern rtx prev_label PARAMS ((rtx));
1114 extern rtx next_label PARAMS ((rtx));
1115 extern rtx next_cc0_user PARAMS ((rtx));
1116 extern rtx prev_cc0_setter PARAMS ((rtx));
1117 extern rtx next_nondeleted_insn PARAMS ((rtx));
1118 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
1119 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
1120 extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1121 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1122 extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1123 extern rtx find_equiv_reg PARAMS ((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode));
1124 extern rtx squeeze_notes PARAMS ((rtx, rtx));
1125 extern rtx delete_insn PARAMS ((rtx));
1126 extern void delete_jump PARAMS ((rtx));
1127 extern void delete_barrier PARAMS ((rtx));
1128 extern rtx get_label_before PARAMS ((rtx));
1129 extern rtx get_label_after PARAMS ((rtx));
1130 extern rtx follow_jumps PARAMS ((rtx));
1131 extern rtx adj_offsettable_operand PARAMS ((rtx, int));
1132 extern rtx try_split PARAMS ((rtx, rtx, int));
1133 extern rtx split_insns PARAMS ((rtx, rtx));
1134 extern rtx simplify_unary_operation PARAMS ((enum rtx_code, enum machine_mode, rtx, enum machine_mode));
1135 extern rtx simplify_binary_operation PARAMS ((enum rtx_code, enum machine_mode, rtx, rtx));
1136 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx));
1137 extern rtx simplify_relational_operation PARAMS ((enum rtx_code, enum machine_mode, rtx, rtx));
1138 extern rtx simplify_gen_binary PARAMS ((enum rtx_code, enum machine_mode,
1140 extern rtx simplify_rtx PARAMS ((rtx));
1141 extern rtx gen_move_insn PARAMS ((rtx, rtx));
1142 extern rtx gen_jump PARAMS ((rtx));
1143 extern rtx gen_beq PARAMS ((rtx));
1144 extern rtx gen_bge PARAMS ((rtx));
1145 extern rtx gen_ble PARAMS ((rtx));
1146 extern rtx gen_mem_addressof PARAMS ((rtx, union tree_node *));
1147 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1148 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx,
1150 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1152 extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
1154 /* Functions in rtlanal.c */
1156 extern int rtx_unstable_p PARAMS ((rtx));
1157 extern int rtx_varies_p PARAMS ((rtx));
1158 extern int rtx_addr_varies_p PARAMS ((rtx));
1159 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1160 extern rtx get_related_value PARAMS ((rtx));
1161 extern int reg_mentioned_p PARAMS ((rtx, rtx));
1162 extern int reg_referenced_p PARAMS ((rtx, rtx));
1163 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1164 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1165 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1166 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
1167 extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1168 extern int no_labels_between_p PARAMS ((rtx, rtx));
1169 extern int no_jumps_between_p PARAMS ((rtx, rtx));
1170 extern int modified_in_p PARAMS ((rtx, rtx));
1171 extern int reg_set_p PARAMS ((rtx, rtx));
1172 extern rtx single_set PARAMS ((rtx));
1173 extern int multiple_sets PARAMS ((rtx));
1174 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
1175 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1177 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
1178 extern void note_stores PARAMS ((rtx,
1179 void (*) (rtx, rtx, void *),
1181 extern rtx reg_set_last PARAMS ((rtx, rtx));
1182 extern int dead_or_set_p PARAMS ((rtx, rtx));
1183 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
1184 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
1185 extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1187 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
1188 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1190 extern void remove_note PARAMS ((rtx, rtx));
1191 extern int side_effects_p PARAMS ((rtx));
1192 extern int volatile_refs_p PARAMS ((rtx));
1193 extern int volatile_insn_p PARAMS ((rtx));
1194 extern int may_trap_p PARAMS ((rtx));
1195 extern int inequality_comparisons_p PARAMS ((rtx));
1196 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
1197 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1199 extern int computed_jump_p PARAMS ((rtx));
1200 typedef int (*rtx_function) PARAMS ((rtx *, void *));
1201 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
1202 extern rtx regno_use_in PARAMS ((unsigned int, rtx));
1203 extern int auto_inc_p PARAMS ((rtx));
1204 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1205 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
1209 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1210 void init_EXPR_INSN_LIST_cache PARAMS ((void));
1211 void free_EXPR_LIST_list PARAMS ((rtx *));
1212 void free_INSN_LIST_list PARAMS ((rtx *));
1213 void free_EXPR_LIST_node PARAMS ((rtx));
1214 void free_INSN_LIST_node PARAMS ((rtx));
1215 rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1216 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
1217 void clear_log_links PARAMS ((rtx));
1221 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1222 Always at least 3, since the combiner could put that many togetherm
1223 and we want this to remain correct for all the remaining passes. */
1225 extern int max_parallel;
1227 /* Free up register info memory. */
1228 extern void free_reg_info PARAMS ((void));
1231 extern int asm_noperands PARAMS ((rtx));
1232 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
1234 enum machine_mode *));
1236 extern enum reg_class reg_preferred_class PARAMS ((int));
1237 extern enum reg_class reg_alternate_class PARAMS ((int));
1239 extern rtx get_first_nonparm_insn PARAMS ((void));
1241 extern void split_all_insns PARAMS ((int));
1243 #define MAX_SAVED_CONST_INT 64
1244 extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1246 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1247 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1248 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1249 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1250 extern rtx const_true_rtx;
1252 extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1254 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1255 same as VOIDmode. */
1257 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1259 /* Likewise, for the constants 1 and 2. */
1261 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1262 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1264 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1265 is used to represent the frame pointer. This is because the
1266 hard frame pointer and the automatic variables are separated by an amount
1267 that cannot be determined until after register allocation. We can assume
1268 that in this case ELIMINABLE_REGS will be defined, one action of which
1269 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1270 #ifndef HARD_FRAME_POINTER_REGNUM
1271 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1274 /* Index labels for global_rtl. */
1275 enum global_rtl_index
1281 /* For register elimination to work properly these hard_frame_pointer_rtx,
1282 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1283 the same register. */
1284 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1285 GR_ARG_POINTER = GR_FRAME_POINTER,
1287 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1288 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1290 GR_HARD_FRAME_POINTER,
1292 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1293 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1294 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1299 GR_VIRTUAL_INCOMING_ARGS,
1300 GR_VIRTUAL_STACK_ARGS,
1301 GR_VIRTUAL_STACK_DYNAMIC,
1302 GR_VIRTUAL_OUTGOING_ARGS,
1308 /* Pointers to standard pieces of rtx are stored here. */
1309 extern rtx global_rtl[GR_MAX];
1311 /* Standard pieces of rtx, to be substituted directly into things. */
1312 #define pc_rtx (global_rtl[GR_PC])
1313 #define cc0_rtx (global_rtl[GR_CC0])
1315 /* All references to certain hard regs, except those created
1316 by allocating pseudo regs into them (when that's possible),
1317 go through these unique rtx objects. */
1318 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1319 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1320 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1321 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1323 extern rtx pic_offset_table_rtx;
1324 extern rtx struct_value_rtx;
1325 extern rtx struct_value_incoming_rtx;
1326 extern rtx static_chain_rtx;
1327 extern rtx static_chain_incoming_rtx;
1328 extern rtx return_address_pointer_rtx;
1330 /* Include the RTL generation functions. */
1336 /* There are some RTL codes that require special attention; the
1337 generation functions included above do the raw handling. If you
1338 add to this list, modify special_rtx in gengenrtl.c as well. You
1339 should also modify gen_rtx to use the special function. */
1341 extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
1342 HOST_WIDE_INT, HOST_WIDE_INT));
1343 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
1344 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
1345 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
1347 /* We need the cast here to ensure that we get the same result both with
1348 and without prototypes. */
1349 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1351 /* Virtual registers are used during RTL generation to refer to locations into
1352 the stack frame when the actual location isn't known until RTL generation
1353 is complete. The routine instantiate_virtual_regs replaces these with
1354 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1357 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1359 /* This points to the first word of the incoming arguments passed on the stack,
1360 either by the caller or by the callee when pretending it was passed by the
1363 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1365 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1367 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1368 variable on the stack. Otherwise, it points to the first variable on
1371 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1373 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1375 /* This points to the location of dynamically-allocated memory on the stack
1376 immediately after the stack pointer has been adjusted by the amount
1379 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1381 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1383 /* This points to the location in the stack at which outgoing arguments should
1384 be written when the stack is pre-pushed (arguments pushed using push
1385 insns always use sp). */
1387 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1389 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1391 /* This points to the Canonical Frame Address of the function. This
1392 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1393 but is calculated relative to the arg pointer for simplicity; the
1394 frame pointer nor stack pointer are necessarily fixed relative to
1395 the CFA until after reload. */
1397 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1399 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1401 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1403 extern rtx find_next_ref PARAMS ((rtx, rtx));
1404 extern rtx *find_single_use PARAMS ((rtx, rtx, rtx *));
1406 extern rtx output_constant_def PARAMS ((union tree_node *));
1407 extern rtx immed_real_const PARAMS ((union tree_node *));
1408 extern union tree_node *make_tree PARAMS ((union tree_node *, rtx));
1410 /* Define a default value for STORE_FLAG_VALUE. */
1412 #ifndef STORE_FLAG_VALUE
1413 #define STORE_FLAG_VALUE 1
1416 /* Nonzero after the second flow pass has completed.
1417 Set to 1 or 0 by toplev.c */
1418 extern int flow2_completed;
1420 /* Nonzero after end of reload pass.
1421 Set to 1 or 0 by reload1.c. */
1423 extern int reload_completed;
1425 /* Set to 1 while reload_as_needed is operating.
1426 Required by some machines to handle any generated moves differently. */
1428 extern int reload_in_progress;
1430 /* If this is nonzero, we do not bother generating VOLATILE
1431 around volatile memory references, and we are willing to
1432 output indirect addresses. If cse is to follow, we reject
1433 indirect addresses so a useful potential cse is generated;
1434 if it is used only once, instruction combination will produce
1435 the same indirect address eventually. */
1436 extern int cse_not_expected;
1438 /* Set to nonzero before life analysis to indicate that it is unsafe to
1439 generate any new pseudo registers. */
1440 extern int no_new_pseudos;
1442 /* Translates rtx code to tree code, for those codes needed by
1443 REAL_ARITHMETIC. The function returns an int because the caller may not
1444 know what `enum tree_code' means. */
1446 extern int rtx_to_tree_code PARAMS ((enum rtx_code));
1449 extern void obfree PARAMS ((char *));
1451 extern void gcc_obstack_init PARAMS ((struct obstack *));
1452 extern void pop_obstacks PARAMS ((void));
1453 extern void push_obstacks PARAMS ((struct obstack *,
1456 struct cse_basic_block_data;
1457 extern int rtx_cost PARAMS ((rtx, enum rtx_code));
1458 extern void delete_trivially_dead_insns PARAMS ((rtx, int));
1460 extern int cse_main PARAMS ((rtx, int, int, FILE *));
1462 extern void cse_end_of_basic_block PARAMS ((rtx,
1463 struct cse_basic_block_data *,
1467 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1468 extern int condjump_p PARAMS ((rtx));
1469 extern rtx condjump_label PARAMS ((rtx));
1470 extern int simplejump_p PARAMS ((rtx));
1471 extern int returnjump_p PARAMS ((rtx));
1472 extern int onlyjump_p PARAMS ((rtx));
1473 extern int sets_cc0_p PARAMS ((rtx));
1474 extern int invert_jump PARAMS ((rtx, rtx));
1475 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1476 extern int true_regnum PARAMS ((rtx));
1477 extern int redirect_jump PARAMS ((rtx, rtx));
1478 extern void jump_optimize PARAMS ((rtx, int, int, int));
1479 extern void jump_optimize_minimal PARAMS ((rtx));
1480 extern void rebuild_jump_labels PARAMS ((rtx));
1481 extern void thread_jumps PARAMS ((rtx, int, int));
1482 extern int redirect_exp PARAMS ((rtx *, rtx, rtx, rtx));
1483 extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
1484 extern int invert_exp PARAMS ((rtx, rtx));
1485 extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
1486 extern void delete_for_peephole PARAMS ((rtx, rtx));
1487 extern int condjump_in_parallel_p PARAMS ((rtx));
1488 extern void never_reached_warning PARAMS ((rtx));
1490 /* Flags for jump_optimize() */
1491 #define JUMP_CROSS_JUMP 1
1492 #define JUMP_CROSS_JUMP_DEATH_MATTERS 2
1493 #define JUMP_NOOP_MOVES 1
1494 #define JUMP_AFTER_REGSCAN 1
1496 /* In emit-rtl.c. */
1497 extern int max_reg_num PARAMS ((void));
1498 extern int max_label_num PARAMS ((void));
1499 extern int get_first_label_num PARAMS ((void));
1500 extern void delete_insns_since PARAMS ((rtx));
1501 extern void mark_reg_pointer PARAMS ((rtx, int));
1502 extern void mark_user_reg PARAMS ((rtx));
1503 extern void reset_used_flags PARAMS ((rtx));
1504 extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1505 extern int get_max_uid PARAMS ((void));
1506 extern int in_sequence_p PARAMS ((void));
1507 extern void force_next_line_note PARAMS ((void));
1508 extern void clear_emit_caches PARAMS ((void));
1509 extern void init_emit PARAMS ((void));
1510 extern void init_emit_once PARAMS ((int));
1511 extern void push_topmost_sequence PARAMS ((void));
1512 extern void pop_topmost_sequence PARAMS ((void));
1513 extern int subreg_realpart_p PARAMS ((rtx));
1514 extern void reverse_comparison PARAMS ((rtx));
1515 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1516 extern void set_new_first_and_last_label_num PARAMS ((int, int));
1517 extern void set_new_last_label_num PARAMS ((int));
1518 extern void unshare_all_rtl_again PARAMS ((rtx));
1519 extern void set_last_insn PARAMS ((rtx));
1520 extern void link_cc0_insns PARAMS ((rtx));
1521 extern void add_insn PARAMS ((rtx));
1522 extern void add_insn_before PARAMS ((rtx, rtx));
1523 extern void add_insn_after PARAMS ((rtx, rtx));
1524 extern void remove_insn PARAMS ((rtx));
1525 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1526 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1527 extern enum rtx_code classify_insn PARAMS ((rtx));
1528 extern rtx emit PARAMS ((rtx));
1529 /* Query and clear/ restore no_line_numbers. This is used by the
1530 switch / case handling in stmt.c to give proper line numbers in
1531 warnings about unreachable code. */
1532 int force_line_numbers PARAMS ((void));
1533 void restore_line_number_status PARAMS ((int old_value));
1534 extern void renumber_insns PARAMS ((FILE *));
1535 extern void remove_unncessary_notes PARAMS ((void));
1537 /* In insn-emit.c */
1538 extern void add_clobbers PARAMS ((rtx, int));
1541 extern int combine_instructions PARAMS ((rtx, unsigned int));
1542 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1543 extern rtx remove_death PARAMS ((unsigned int, rtx));
1545 extern void dump_combine_stats PARAMS ((FILE *));
1546 extern void dump_combine_total_stats PARAMS ((FILE *));
1551 extern void schedule_insns PARAMS ((FILE *));
1553 extern void fix_sched_param PARAMS ((const char *, const char *));
1555 /* In print-rtl.c */
1556 extern void debug_rtx PARAMS ((rtx));
1557 extern void debug_rtx_list PARAMS ((rtx, int));
1558 extern rtx debug_rtx_find PARAMS ((rtx, int));
1560 extern void print_rtl PARAMS ((FILE *, rtx));
1561 extern int print_rtl_single PARAMS ((FILE *, rtx));
1562 extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
1566 extern void init_loop PARAMS ((void));
1567 extern rtx libcall_other_reg PARAMS ((rtx, rtx));
1569 extern void loop_optimize PARAMS ((rtx, FILE *, int, int));
1571 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
1574 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1575 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1576 extern int prologue_epilogue_contains PARAMS ((rtx));
1577 extern int sibcall_epilogue_contains PARAMS ((rtx));
1578 extern HOST_WIDE_INT get_frame_size PARAMS ((void));
1579 extern void preserve_rtl_expr_result PARAMS ((rtx));
1580 extern void mark_temp_addr_taken PARAMS ((rtx));
1581 extern void update_temp_slot_address PARAMS ((rtx, rtx));
1582 extern void purge_addressof PARAMS ((rtx));
1585 extern int operands_match_p PARAMS ((rtx, rtx));
1586 extern int safe_from_earlyclobber PARAMS ((rtx, rtx));
1589 extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
1590 extern void expand_null_return PARAMS ((void));
1591 extern void emit_jump PARAMS ((rtx));
1592 extern int preserve_subexpressions_p PARAMS ((void));
1595 extern void init_expr_once PARAMS ((void));
1596 extern void move_by_pieces PARAMS ((rtx, rtx, int, unsigned int));
1599 extern void allocate_bb_life_data PARAMS ((void));
1600 extern void allocate_reg_life_data PARAMS ((void));
1601 extern void recompute_reg_usage PARAMS ((rtx, int));
1603 extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1604 extern void dump_flow_info PARAMS ((FILE *));
1608 extern void init_expmed PARAMS ((void));
1609 extern void expand_inc PARAMS ((rtx, rtx));
1610 extern void expand_dec PARAMS ((rtx, rtx));
1611 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
1612 unsigned HOST_WIDE_INT, rtx,
1617 extern int gcse_main PARAMS ((rtx, FILE *));
1621 extern void mark_elimination PARAMS ((int, int));
1623 extern int global_alloc PARAMS ((FILE *));
1624 extern void dump_global_regs PARAMS ((FILE *));
1627 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
1629 extern void build_insn_chain PARAMS ((rtx));
1632 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1633 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1634 extern void globalize_reg PARAMS ((int));
1635 extern void init_regs PARAMS ((void));
1636 extern void init_reg_sets PARAMS ((void));
1637 extern void regset_release_memory PARAMS ((void));
1638 extern void regclass_init PARAMS ((void));
1639 extern void regclass PARAMS ((rtx, int, FILE *));
1640 extern void reg_scan PARAMS ((rtx, unsigned int, int));
1641 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
1642 extern void fix_register PARAMS ((const char *, int, int));
1644 extern void delete_null_pointer_checks PARAMS ((rtx));
1648 extern void regmove_optimize PARAMS ((rtx, int, FILE *));
1650 extern void combine_stack_adjustments PARAMS ((void));
1654 extern void dbr_schedule PARAMS ((rtx, FILE *));
1658 extern void init_optabs PARAMS ((void));
1660 /* In local-alloc.c */
1662 extern void dump_local_alloc PARAMS ((FILE *));
1664 extern int local_alloc PARAMS ((void));
1665 extern int function_invariant_p PARAMS ((rtx));
1668 extern void reload_cse_regs PARAMS ((rtx));
1669 extern void init_reload PARAMS ((void));
1670 extern void mark_home_live PARAMS ((int));
1672 extern int reload PARAMS ((rtx, int, FILE *));
1675 /* In caller-save.c */
1676 extern void init_caller_save PARAMS ((void));
1679 extern void init_branch_prob PARAMS ((const char *));
1681 extern void branch_prob PARAMS ((rtx, FILE *));
1682 extern void end_branch_prob PARAMS ((FILE *));
1684 extern void output_func_start_profiler PARAMS ((void));
1686 /* In reg-stack.c */
1688 extern void reg_to_stack PARAMS ((rtx, FILE *));
1691 /* In fold-const.c */
1692 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1693 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1694 unsigned HOST_WIDE_INT *,
1696 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1697 unsigned HOST_WIDE_INT *,
1699 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1701 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1702 unsigned HOST_WIDE_INT *,
1704 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1705 HOST_WIDE_INT, unsigned int,
1706 unsigned HOST_WIDE_INT *,
1707 HOST_WIDE_INT *, int));
1708 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1709 HOST_WIDE_INT, unsigned int,
1710 unsigned HOST_WIDE_INT *,
1711 HOST_WIDE_INT *, int));
1712 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1713 HOST_WIDE_INT, unsigned int,
1714 unsigned HOST_WIDE_INT *,
1716 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1717 HOST_WIDE_INT, unsigned int,
1718 unsigned HOST_WIDE_INT *,
1722 extern void emit_library_call PARAMS ((rtx, int, enum machine_mode,
1724 extern rtx emit_library_call_value PARAMS ((rtx, rtx, int,
1729 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
1732 extern void bss_section PARAMS ((void));
1733 extern int in_data_section PARAMS ((void));
1734 extern int supports_one_only PARAMS ((void));
1735 extern void init_varasm_once PARAMS ((void));
1738 extern void init_rtl PARAMS ((void));
1739 extern void rtx_free PARAMS ((rtx));
1742 extern int read_skip_spaces PARAMS ((FILE *));
1743 extern rtx read_rtx PARAMS ((FILE *));
1746 extern const char *read_rtx_filename;
1747 extern int read_rtx_lineno;
1749 /* Redefine abort to report an internal error w/o coredump, and
1750 reporting the location of the error in the source file. This logic
1751 is duplicated in rtl.h and tree.h because every file that needs the
1752 special abort includes one or both. toplev.h gets too few files,
1753 system.h gets too many. */
1755 extern void fancy_abort PARAMS ((const char *, int, const char *))
1757 #if (GCC_VERSION >= 2007)
1758 #define abort() fancy_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
1760 #define abort() fancy_abort (__FILE__, __LINE__, 0)
1764 extern rtx canon_rtx PARAMS ((rtx));
1765 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
1767 extern int read_dependence PARAMS ((rtx, rtx));
1768 extern int anti_dependence PARAMS ((rtx, rtx));
1769 extern int output_dependence PARAMS ((rtx, rtx));
1770 extern void mark_constant_function PARAMS ((void));
1771 extern void init_alias_once PARAMS ((void));
1772 extern void init_alias_analysis PARAMS ((void));
1773 extern void end_alias_analysis PARAMS ((void));
1775 extern void record_base_value PARAMS ((int, rtx, int));
1776 extern void record_alias_subset PARAMS ((int, int));
1777 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
1781 sibcall_use_normal = 1,
1782 sibcall_use_tail_recursion,
1786 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
1787 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
1790 extern int stack_regs_mentioned PARAMS ((rtx insn));
1794 extern void convert_to_ssa PARAMS ((void));
1795 extern void convert_from_ssa PARAMS ((void));
1799 extern rtx stack_limit_rtx;
1801 /* In regrename.c */
1803 extern void regrename_optimize PARAMS ((void));