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
92 struct rtvec_def
*rtvec
;
93 enum machine_mode rttype
;
94 addr_diff_vec_flags rt_addr_diff_vec_flags
;
95 struct bitmap_head_def
*rtbit
;
96 union tree_node
*rttree
;
97 struct basic_block_def
*bb
;
100 /* RTL expression ("rtx"). */
102 typedef struct rtx_def
104 #ifdef ONLY_INT_FIELDS
105 #ifdef CODE_FIELD_BUG
106 unsigned int code
: 16;
111 /* The kind of expression this is. */
112 enum rtx_code code
: 16;
115 /* The kind of value the expression has. */
116 #ifdef ONLY_INT_FIELDS
119 enum machine_mode mode
: 8;
121 /* LINK_COST_ZERO in an INSN_LIST. */
122 unsigned int jump
: 1;
123 /* LINK_COST_FREE in an INSN_LIST. */
124 unsigned int call
: 1;
125 /* 1 in a MEM or REG if value of this expression will never change
126 during the current function, even though it is not
128 1 in a SUBREG if it is from a promoted variable that is unsigned.
129 1 in a SYMBOL_REF if it addresses something in the per-function
131 1 in a CALL_INSN if it is a const call.
132 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
133 reorg until end of compilation; cleared before used. */
134 unsigned int unchanging
: 1;
135 /* 1 in a MEM expression if contents of memory are volatile.
136 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
138 1 in a REG expression if corresponds to a variable declared by the user.
139 0 for an internally generated temporary.
140 In a SYMBOL_REF, this flag is used for machine-specific purposes.
141 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
142 unsigned int volatil
: 1;
143 /* 1 in a MEM referring to a field of an aggregate.
144 0 if the MEM was a variable or the result of a * operator in C;
145 1 if it was the result of a . or -> operator (on a struct) in C.
146 1 in a REG if the register is used only in exit code a loop.
147 1 in a SUBREG expression if was generated from a variable with a
149 1 in a CODE_LABEL if the label is used for nonlocal gotos
150 and must not be deleted even if its count is zero.
151 1 in a LABEL_REF if this is a reference to a label outside the
153 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
154 together with the preceding insn. Valid only within sched.
155 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
156 from the target of a branch. Valid from reorg until end of compilation;
157 cleared before used. */
158 unsigned int in_struct
: 1;
159 /* 1 if this rtx is used. This is used for copying shared structure.
160 See `unshare_all_rtl'.
161 In a REG, this is not needed for that purpose, and used instead
162 in `leaf_renumber_regs_insn'.
163 In a SYMBOL_REF, means that emit_library_call
164 has used it as the function. */
165 unsigned int used
: 1;
166 /* Nonzero if this rtx came from procedure integration.
167 In a REG, nonzero means this reg refers to the return value
168 of the current function. */
169 unsigned integrated
: 1;
170 /* 1 in an INSN or a SET if this rtx is related to the call frame,
171 either changing how we compute the frame address or saving and
172 restoring registers in the prologue and epilogue.
173 1 in a MEM if the MEM refers to a scalar, rather than a member of
175 unsigned frame_related
: 1;
177 /* The first element of the operands of this rtx.
178 The number of operands and their types are controlled
179 by the `code' field, according to rtl.def. */
183 #define NULL_RTX (rtx) 0
185 /* Define macros to access the `code' field of the rtx. */
187 #ifdef SHORT_ENUM_BUG
188 #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
189 #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
191 #define GET_CODE(RTX) ((RTX)->code)
192 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
195 #define GET_MODE(RTX) ((RTX)->mode)
196 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
198 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
199 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
200 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
202 /* RTL vector. These appear inside RTX's when there is a need
203 for a variable number of things. The principle use is inside
204 PARALLEL expressions. */
206 typedef struct rtvec_def
{
207 int num_elem
; /* number of elements */
208 struct rtx_def
*elem
[1];
211 #define NULL_RTVEC (rtvec) 0
213 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
214 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
216 /* 1 if X is a REG. */
218 #define REG_P(X) (GET_CODE (X) == REG)
220 /* 1 if X is a constant value that is an integer. */
222 #define CONSTANT_P(X) \
223 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
224 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
225 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
226 || GET_CODE (X) == CONSTANT_P_RTX)
228 /* General accessor macros for accessing the fields of an rtx. */
230 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
231 /* The bit with a star outside the statement expr and an & inside is
232 so that N can be evaluated only once. */
233 #define RTL_CHECK1(RTX, N, C1) \
234 (*({ rtx _rtx = (RTX); int _n = (N); \
235 enum rtx_code _code = GET_CODE (_rtx); \
236 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
237 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
238 __PRETTY_FUNCTION__); \
239 if (GET_RTX_FORMAT(_code)[_n] != C1) \
240 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
241 __PRETTY_FUNCTION__); \
244 #define RTL_CHECK2(RTX, N, C1, C2) \
245 (*({ rtx _rtx = (RTX); int _n = (N); \
246 enum rtx_code _code = GET_CODE (_rtx); \
247 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
248 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
249 __PRETTY_FUNCTION__); \
250 if (GET_RTX_FORMAT(_code)[_n] != C1 \
251 && GET_RTX_FORMAT(_code)[_n] != C2) \
252 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
253 __PRETTY_FUNCTION__); \
256 #define RTL_CHECKC1(RTX, N, C) \
257 (*({ rtx _rtx = (RTX); int _n = (N); \
258 if (GET_CODE (_rtx) != C) \
259 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, \
260 __PRETTY_FUNCTION__); \
263 #define RTL_CHECKC2(RTX, N, C1, C2) \
264 (*({ rtx _rtx = (RTX); int _n = (N); \
265 enum rtx_code _code = GET_CODE (_rtx); \
266 if (_code != C1 && _code != C2) \
267 rtl_check_failed_code2 (_rtx, C1, C2, __FILE__, __LINE__, \
268 __PRETTY_FUNCTION__); \
271 #define RTVEC_ELT(RTVEC, I) \
272 (*({ rtvec _rtvec = (RTVEC); int _i = (I); \
273 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
274 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
275 __PRETTY_FUNCTION__); \
276 &_rtvec->elem[_i]; }))
278 extern void rtl_check_failed_bounds
PARAMS ((rtx
, int,
279 const char *, int, const char *))
281 extern void rtl_check_failed_type1
PARAMS ((rtx
, int, int,
282 const char *, int, const char *))
284 extern void rtl_check_failed_type2
PARAMS ((rtx
, int, int, int,
285 const char *, int, const char *))
287 extern void rtl_check_failed_code1
PARAMS ((rtx
, enum rtx_code
,
288 const char *, int, const char *))
290 extern void rtl_check_failed_code2
PARAMS ((rtx
, enum rtx_code
, enum rtx_code
,
291 const char *, int, const char *))
293 extern void rtvec_check_failed_bounds
PARAMS ((rtvec
, int,
294 const char *, int, const char *))
297 #else /* not ENABLE_RTL_CHECKING */
299 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
300 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
301 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
302 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
303 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
307 #define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
308 #define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
309 #define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
310 #define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
311 #define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
312 #define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
313 #define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
314 #define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
315 #define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
317 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
318 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
320 /* These are like XWINT, etc. except that they expect a '0' field instead
321 of the normal type code. */
323 #define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
324 #define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
325 #define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
326 #define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
327 #define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
328 #define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
329 #define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
330 #define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
331 #define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
332 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
334 #define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
335 #define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
336 #define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
337 #define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
338 #define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
339 #define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
340 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
341 #define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
342 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
343 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
345 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
346 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
348 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
350 /* ACCESS MACROS for particular fields of insns. */
352 /* Holds a unique number for each insn.
353 These are not necessarily sequentially increasing. */
354 #define INSN_UID(INSN) XINT(INSN, 0)
356 /* Chain insns together in sequence. */
357 #define PREV_INSN(INSN) XEXP(INSN, 1)
358 #define NEXT_INSN(INSN) XEXP(INSN, 2)
360 /* The body of an insn. */
361 #define PATTERN(INSN) XEXP(INSN, 3)
363 /* Code number of instruction, from when it was recognized.
364 -1 means this instruction has not been recognized yet. */
365 #define INSN_CODE(INSN) XINT(INSN, 4)
367 /* Set up in flow.c; empty before then.
368 Holds a chain of INSN_LIST rtx's whose first operands point at
369 previous insns with direct data-flow connections to this one.
370 That means that those insns set variables whose next use is in this insn.
371 They are always in the same basic block as this insn. */
372 #define LOG_LINKS(INSN) XEXP(INSN, 5)
374 /* 1 if insn has been deleted. */
375 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
377 /* 1 if insn is a call to a const function. */
378 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
380 /* 1 if insn is a branch that should not unconditionally execute its
381 delay slots, i.e., it is an annulled branch. */
382 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
384 /* 1 if insn is in a delay slot and is from the target of the branch. If
385 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
386 executed if the branch is taken. For annulled branches with this bit
387 clear, the insn should be executed only if the branch is not taken. */
388 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
390 /* Holds a list of notes on what this insn does to various REGs.
391 It is a chain of EXPR_LIST rtx's, where the second operand
392 is the chain pointer and the first operand is the REG being described.
393 The mode field of the EXPR_LIST contains not a real machine mode
394 but a value that says what this note says about the REG:
395 REG_DEAD means that the value in REG dies in this insn (i.e., it is
396 not needed past this insn). If REG is set in this insn, the REG_DEAD
397 note may, but need not, be omitted.
398 REG_INC means that the REG is autoincremented or autodecremented.
399 REG_EQUIV describes the insn as a whole; it says that the insn
400 sets a register to a constant value or to be equivalent to a memory
401 address. If the register is spilled to the stack then the constant
402 value should be substituted for it. The contents of the REG_EQUIV
403 is the constant value or memory address, which may be different
404 from the source of the SET although it has the same value. A
405 REG_EQUIV note may also appear on an insn which copies a register
406 parameter to a pseudo-register, if there is a memory address which
407 could be used to hold that pseudo-register throughout the function.
408 REG_EQUAL is like REG_EQUIV except that the destination
409 is only momentarily equal to the specified rtx. Therefore, it
410 cannot be used for substitution; but it can be used for cse.
411 REG_RETVAL means that this insn copies the return-value of
412 a library call out of the hard reg for return values. This note
413 is actually an INSN_LIST and it points to the first insn involved
414 in setting up arguments for the call. flow.c uses this to delete
415 the entire library call when its result is dead.
416 REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
417 of the library call and points at the one that has the REG_RETVAL.
418 REG_WAS_0 says that the register set in this insn held 0 before the insn.
419 The contents of the note is the insn that stored the 0.
420 If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
421 The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
422 REG_NONNEG means that the register is always nonnegative during
423 the containing loop. This is used in branches so that decrement and
424 branch instructions terminating on zero can be matched. There must be
425 an insn pattern in the md file named `decrement_and_branch_until_zero'
426 or else this will never be added to any instructions.
427 REG_NO_CONFLICT means there is no conflict *after this insn*
428 between the register in the note and the destination of this insn.
429 REG_UNUSED identifies a register set in this insn and never used.
430 REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
431 CC0, respectively. Normally, these are required to be consecutive insns,
432 but we permit putting a cc0-setting insn in the delay slot of a branch
433 as long as only one copy of the insn exists. In that case, these notes
434 point from one to the other to allow code generation to determine what
435 any require information and to properly update CC_STATUS.
436 REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
437 say that the CODE_LABEL contained in the REG_LABEL note is used
439 REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
440 dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
441 (write after write) dependencies. Data dependencies, which are the only
442 type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
443 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
444 -fbranch-probabilities is given. It has an integer value. For jumps,
445 it is the probability that this is a taken branch. For calls, it is the
446 probability that this call won't return.
447 REG_EXEC_COUNT is attached to the first insn of each basic block, and
448 the first insn after each CALL_INSN. It indicates how many times this
450 REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
451 allocations for targets where SETJMP_VIA_SAVE_AREA is true.
452 REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
453 flags computed by get_jump_flags() after dbr scheduling is complete.
454 REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
455 but are too complex for DWARF to interpret what they imply. The attached
456 rtx is used instead of intuition.
457 REG_EH_REGION is used to indicate what exception region an INSN
458 belongs in. This can be used to indicate what region a call may throw
459 to. a REGION of 0 indicates that a call cannot throw at all.
460 a REGION of -1 indicates that it cannot throw, nor will it execute
462 REG_EH_RETHROW is used to indicate that a call is actually a
463 call to rethrow, and specifies the rethrow symbol for the region
464 the rethrow is targetting. This provides a way to generate the
465 non standard flow edges required for a rethrow.
466 REG_SAVE_NOTE is used by haifa-sched to save NOTE_INSN notes
467 across scheduling. */
469 #define REG_NOTES(INSN) XEXP(INSN, 6)
471 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
473 /* Don't forget to change reg_note_name in rtl.c. */
474 enum reg_note
{ REG_DEAD
= 1, REG_INC
= 2, REG_EQUIV
= 3, REG_WAS_0
= 4,
475 REG_EQUAL
= 5, REG_RETVAL
= 6, REG_LIBCALL
= 7,
476 REG_NONNEG
= 8, REG_NO_CONFLICT
= 9, REG_UNUSED
= 10,
477 REG_CC_SETTER
= 11, REG_CC_USER
= 12, REG_LABEL
= 13,
478 REG_DEP_ANTI
= 14, REG_DEP_OUTPUT
= 15, REG_BR_PROB
= 16,
479 REG_EXEC_COUNT
= 17, REG_NOALIAS
= 18, REG_SAVE_AREA
= 19,
480 REG_BR_PRED
= 20, REG_EH_CONTEXT
= 21,
481 REG_FRAME_RELATED_EXPR
= 22, REG_EH_REGION
= 23,
482 REG_EH_RETHROW
= 24, REG_SAVE_NOTE
= 25 };
483 /* The base value for branch probability notes. */
484 #define REG_BR_PROB_BASE 10000
486 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
487 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
488 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
490 /* Names for REG_NOTE's in EXPR_LIST insn's. */
492 extern const char * const reg_note_name
[];
493 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
495 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
496 USE and CLOBBER expressions.
497 USE expressions list the registers filled with arguments that
498 are passed to the function.
499 CLOBBER expressions document the registers explicitly clobbered
501 Pseudo registers can not be mentioned in this list. */
502 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
504 /* The label-number of a code-label. The assembler label
505 is made from `L' and the label-number printed in decimal.
506 Label numbers are unique in a compilation. */
507 #define CODE_LABEL_NUMBER(INSN) XINT(INSN, 3)
509 #define LINE_NUMBER NOTE
511 /* In a NOTE that is a line number, this is a string for the file name that the
512 line is in. We use the same field to record block numbers temporarily in
513 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
514 between ints and pointers if we use a different macro for the block number.)
515 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
516 information as a rtx in the field. */
518 #define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
519 #define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
520 #define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
521 #define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
522 #define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
523 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
525 /* In a NOTE that is a line number, this is the line number.
526 Other kinds of NOTEs are identified by negative numbers here. */
527 #define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
529 /* Codes that appear in the NOTE_LINE_NUMBER field
530 for kinds of notes that are not line numbers.
532 Notice that we do not try to use zero here for any of
533 the special note codes because sometimes the source line
534 actually can be zero! This happens (for example) when we
535 are generating code for the per-translation-unit constructor
536 and destructor routines for some C++ translation unit.
538 If you should change any of the following values, or if you
539 should add a new value here, don't forget to change the
540 note_insn_name array in rtl.c. */
542 /* This note is used to get rid of an insn
543 when it isn't safe to patch the insn out of the chain. */
544 #define NOTE_INSN_DELETED -1
545 #define NOTE_INSN_BLOCK_BEG -2
546 #define NOTE_INSN_BLOCK_END -3
547 #define NOTE_INSN_LOOP_BEG -4
548 #define NOTE_INSN_LOOP_END -5
549 /* This kind of note is generated at the end of the function body,
550 just before the return insn or return label.
551 In an optimizing compilation it is deleted by the first jump optimization,
552 after enabling that optimizer to determine whether control can fall
553 off the end of the function body without a return statement. */
554 #define NOTE_INSN_FUNCTION_END -6
555 /* This kind of note is generated just after each call to `setjmp', et al. */
556 #define NOTE_INSN_SETJMP -7
557 /* Generated at the place in a loop that `continue' jumps to. */
558 #define NOTE_INSN_LOOP_CONT -8
559 /* Generated at the start of a duplicated exit test. */
560 #define NOTE_INSN_LOOP_VTOP -9
561 /* This marks the point immediately after the last prologue insn. */
562 #define NOTE_INSN_PROLOGUE_END -10
563 /* This marks the point immediately prior to the first epilogue insn. */
564 #define NOTE_INSN_EPILOGUE_BEG -11
565 /* Generated in place of user-declared labels when they are deleted. */
566 #define NOTE_INSN_DELETED_LABEL -12
567 /* This note indicates the start of the real body of the function,
568 i.e. the point just after all of the parms have been moved into
570 #define NOTE_INSN_FUNCTION_BEG -13
571 /* These note where exception handling regions begin and end. */
572 #define NOTE_INSN_EH_REGION_BEG -14
573 #define NOTE_INSN_EH_REGION_END -15
574 /* Generated whenever a duplicate line number note is output. For example,
575 one is output after the end of an inline function, in order to prevent
576 the line containing the inline call from being counted twice in gcov. */
577 #define NOTE_REPEATED_LINE_NUMBER -16
579 /* Start/end of a live range region, where pseudos allocated on the stack can
580 be allocated to temporary registers. */
581 #define NOTE_INSN_RANGE_START -17
582 #define NOTE_INSN_RANGE_END -18
583 /* Record which registers are currently live. */
584 #define NOTE_INSN_LIVE -19
585 /* Record the struct for the following basic block. */
586 #define NOTE_INSN_BASIC_BLOCK -20
588 /* Names for NOTE insn's other than line numbers. */
590 extern const char * const note_insn_name
[];
591 #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
593 /* The name of a label, in case it corresponds to an explicit label
594 in the input source code. */
595 #define LABEL_NAME(RTX) XCSTR(RTX, 4, CODE_LABEL)
597 /* In jump.c, each label contains a count of the number
598 of LABEL_REFs that point at it, so unused labels can be deleted. */
599 #define LABEL_NUSES(RTX) XCINT(RTX, 5, CODE_LABEL)
601 /* Associate a name with a CODE_LABEL. */
602 #define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
604 /* The original regno this ADDRESSOF was built for. */
605 #define ADDRESSOF_REGNO(RTX) XCINT(RTX, 1, ADDRESSOF)
607 /* The variable in the register we took the address of. */
608 #define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
610 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
611 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
612 be decremented and possibly the label can be deleted. */
613 #define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
615 /* Once basic blocks are found in flow.c,
616 each CODE_LABEL starts a chain that goes through
617 all the LABEL_REFs that jump to that label.
618 The chain eventually winds up at the CODE_LABEL; it is circular. */
619 #define LABEL_REFS(LABEL) XCEXP(LABEL, 6, CODE_LABEL)
621 /* This is the field in the LABEL_REF through which the circular chain
622 of references to a particular label is linked.
623 This chain is set up in flow.c. */
625 #define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
627 /* Once basic blocks are found in flow.c,
628 Each LABEL_REF points to its containing instruction with this field. */
630 #define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
632 /* For a REG rtx, REGNO extracts the register number. */
634 #define REGNO(RTX) XCINT(RTX, 0, REG)
636 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
637 is the current function's return value. */
639 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
641 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
642 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
644 /* For a CONST_INT rtx, INTVAL extracts the integer. */
646 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
648 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
649 SUBREG_WORD extracts the word-number. */
651 #define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
652 #define SUBREG_WORD(RTX) XCINT(RTX, 1, SUBREG)
654 /* 1 if the REG contained in SUBREG_REG is already known to be
655 sign- or zero-extended from the mode of the SUBREG to the mode of
656 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
659 When used as a LHS, is means that this extension must be done
660 when assigning to SUBREG_REG. */
662 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
663 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
665 /* Access various components of an ASM_OPERANDS rtx. */
667 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
668 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
669 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
670 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
671 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
672 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
673 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
674 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
675 #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
676 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
677 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
679 /* For a MEM rtx, 1 if it's a volatile reference.
680 Also in an ASM_OPERANDS rtx. */
681 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
683 /* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero,
684 RTX may or may not refer to a field of an aggregate. */
685 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
687 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
688 not refer to a scalar.*/
689 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
691 /* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P
692 attributes from RHS to LHS. */
693 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
694 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
695 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
696 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS))
698 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
699 RTX. Otherwise, vice versa. Use this macro only when you are
700 *sure* that you know that the MEM is in a structure, or is a
701 scalar. VAL is evaluated only once. */
702 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
703 ((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \
704 : (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1))
706 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
707 set, and may alias anything. Otherwise, the MEM can only alias
708 MEMs in the same alias set. This value is set in a
709 language-dependent manner in the front-end, and should not be
710 altered in the back-end. These set numbers are tested for zero,
711 and compared for equality; they have no other significance. In
712 some front-ends, these numbers may correspond in some way to types,
713 or other language-level entities, but they need not, and the
714 back-end makes no such assumptions. */
715 #define MEM_ALIAS_SET(RTX) XCINT(RTX, 1, MEM)
717 /* For a LABEL_REF, 1 means that this reference is to a label outside the
718 loop containing the reference. */
719 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
721 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
722 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
723 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
725 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
726 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
728 /* For a REG, 1 means the register is used only in an exit test of a loop. */
729 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
731 /* During sched, for an insn, 1 means that the insn must be scheduled together
732 with the preceding insn. */
733 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
735 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
736 cost of the dependence link. The cost of executing an instruction
737 may vary based on how the results are used. LINK_COST_ZERO is 1 when
738 the cost through the link varies and is unchanged (i.e., the link has
739 zero additional cost). LINK_COST_FREE is 1 when the cost through the
740 link is zero (i.e., the link makes the cost free). In other cases,
741 the adjustment to the cost is recomputed each time it is needed. */
742 #define LINK_COST_ZERO(X) ((X)->jump)
743 #define LINK_COST_FREE(X) ((X)->call)
745 /* For a SET rtx, SET_DEST is the place that is set
746 and SET_SRC is the value it is set to. */
747 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
748 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
750 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
751 #define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
752 #define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
754 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
755 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
757 /* Flag in a SYMBOL_REF for machine-specific purposes. */
758 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
760 /* 1 in a SYMBOL_REF if it represents a symbol which might have to change
761 if its inlined or unrolled. */
762 #define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
764 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
765 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
767 /* Define a macro to look for REG_INC notes,
768 but save time on machines where they never exist. */
770 /* Don't continue this line--convex cc version 4.1 would lose. */
771 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
772 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
774 #define FIND_REG_INC_NOTE(insn, reg) 0
777 /* Indicate whether the machine has any sort of auto increment addressing.
778 If not, we can avoid checking for REG_INC notes. */
780 /* Don't continue this line--convex cc version 4.1 would lose. */
781 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
785 #ifndef HAVE_PRE_INCREMENT
786 #define HAVE_PRE_INCREMENT 0
789 #ifndef HAVE_PRE_DECREMENT
790 #define HAVE_PRE_DECREMENT 0
793 #ifndef HAVE_POST_INCREMENT
794 #define HAVE_POST_INCREMENT 0
797 #ifndef HAVE_POST_DECREMENT
798 #define HAVE_POST_DECREMENT 0
802 /* Some architectures do not have complete pre/post increment/decrement
803 instruction sets, or only move some modes efficiently. These macros
804 allow us to tune autoincrement generation. */
806 #ifndef USE_LOAD_POST_INCREMENT
807 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
810 #ifndef USE_LOAD_POST_DECREMENT
811 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
814 #ifndef USE_LOAD_PRE_INCREMENT
815 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
818 #ifndef USE_LOAD_PRE_DECREMENT
819 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
822 #ifndef USE_STORE_POST_INCREMENT
823 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
826 #ifndef USE_STORE_POST_DECREMENT
827 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
830 #ifndef USE_STORE_PRE_INCREMENT
831 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
834 #ifndef USE_STORE_PRE_DECREMENT
835 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
839 /* Accessors for RANGE_INFO. */
840 /* For RANGE_{START,END} notes return the RANGE_START note. */
841 #define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
843 /* For RANGE_{START,END} notes return the RANGE_START note. */
844 #define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
846 /* For RANGE_{START,END} notes, return the vector containing the registers used
848 #define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
849 #define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
850 #define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
852 /* For RANGE_{START,END} notes, the number of calls within the range. */
853 #define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
855 /* For RANGE_{START,END} notes, the number of insns within the range. */
856 #define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
858 /* For RANGE_{START,END} notes, a unique # to identify this range. */
859 #define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
861 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
862 #define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
864 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
865 #define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
867 /* For RANGE_{START,END} notes, the loop depth the range is in. */
868 #define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
870 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
872 #define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
874 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
876 #define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
878 /* For RANGE_START notes, the marker # of the start of the range. */
879 #define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
881 /* For RANGE_START notes, the marker # of the end of the range. */
882 #define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
884 /* Original pseudo register # for a live range note. */
885 #define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
887 /* Pseudo register # original register is copied into or -1. */
888 #define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
890 /* How many times a register in a live range note was referenced. */
891 #define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
893 /* How many times a register in a live range note was set. */
894 #define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
896 /* How many times a register in a live range note died. */
897 #define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
899 /* Whether the original value is needed to be copied into the range register at
900 the start of the range. */
901 #define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
903 /* # of insns the register copy is live over. */
904 #define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
906 /* # of calls the register copy is live over. */
907 #define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
909 /* DECL_NODE pointer of the declaration if the register is a user defined
911 #define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
913 /* BLOCK_NODE pointer to the block the variable is declared in if the
914 register is a user defined variable. */
915 #define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
917 /* EXPR_LIST of the distinct ranges a variable is in. */
918 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
920 /* Block a variable is declared in. */
921 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
923 /* # of distinct ranges a variable is in. */
924 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
926 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
927 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
929 /* For a NOTE_INSN_LIVE note, the original basic block number. */
930 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
932 /* Nonzero if we need to distinguish between the return value of this function
933 and the return value of a function called by this function. This helps
935 This is 1 until after the rtl generation pass. */
936 extern int rtx_equal_function_value_matters
;
938 /* Generally useful functions. */
940 /* The following functions accept a wide integer argument. Rather than
941 having to cast on every function call, we use a macro instead, that is
942 defined here and in tree.h. */
945 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
946 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
948 extern int exact_log2_wide
PARAMS ((unsigned HOST_WIDE_INT
));
949 extern int floor_log2_wide
PARAMS ((unsigned HOST_WIDE_INT
));
952 extern int ceil_log2
PARAMS ((unsigned HOST_WIDE_INT
));
954 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
956 #define plus_constant_for_output(X,C) \
957 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
960 extern void set_stack_check_libfunc
PARAMS ((rtx
));
961 extern HOST_WIDE_INT trunc_int_for_mode
PARAMS ((HOST_WIDE_INT
,
963 extern rtx plus_constant_wide
PARAMS ((rtx
, HOST_WIDE_INT
));
964 extern rtx plus_constant_for_output_wide
PARAMS ((rtx
, HOST_WIDE_INT
));
965 extern void optimize_save_area_alloca
PARAMS ((rtx
));
967 extern rtx gen_rtx
PARAMS ((enum rtx_code
,
968 enum machine_mode
, ...));
969 extern rtvec gen_rtvec
PARAMS ((int, ...));
971 extern char *oballoc
PARAMS ((int));
972 extern char *permalloc
PARAMS ((int));
973 extern rtx rtx_alloc
PARAMS ((RTX_CODE
));
974 extern rtvec rtvec_alloc
PARAMS ((int));
975 extern rtx copy_insn_1
PARAMS ((rtx
));
976 extern rtx copy_insn
PARAMS ((rtx
));
977 extern rtx copy_rtx
PARAMS ((rtx
));
978 extern rtx copy_rtx_if_shared
PARAMS ((rtx
));
979 extern rtx copy_most_rtx
PARAMS ((rtx
, rtx
));
980 extern rtx shallow_copy_rtx
PARAMS ((rtx
));
981 extern int rtx_equal_p
PARAMS ((rtx
, rtx
));
982 extern rtvec gen_rtvec_v
PARAMS ((int, rtx
*));
983 extern rtx gen_reg_rtx
PARAMS ((enum machine_mode
));
984 extern rtx gen_label_rtx
PARAMS ((void));
985 extern rtx gen_lowpart_common
PARAMS ((enum machine_mode
, rtx
));
986 extern rtx gen_lowpart
PARAMS ((enum machine_mode
, rtx
));
987 extern rtx gen_lowpart_if_possible
PARAMS ((enum machine_mode
, rtx
));
988 extern rtx gen_highpart
PARAMS ((enum machine_mode
, rtx
));
989 extern rtx gen_realpart
PARAMS ((enum machine_mode
, rtx
));
990 extern rtx gen_imagpart
PARAMS ((enum machine_mode
, rtx
));
991 extern rtx operand_subword
PARAMS ((rtx
, int, int, enum machine_mode
));
992 extern rtx operand_subword_force
PARAMS ((rtx
, int, enum machine_mode
));
993 extern int subreg_lowpart_p
PARAMS ((rtx
));
994 extern rtx make_safe_from
PARAMS ((rtx
, rtx
));
995 extern rtx convert_memory_address
PARAMS ((enum machine_mode
, rtx
));
996 extern rtx memory_address
PARAMS ((enum machine_mode
, rtx
));
997 extern rtx get_insns
PARAMS ((void));
998 extern const char *get_insn_name
PARAMS ((int));
999 extern rtx get_last_insn
PARAMS ((void));
1000 extern rtx get_last_insn_anywhere
PARAMS ((void));
1001 extern void start_sequence
PARAMS ((void));
1002 extern void push_to_sequence
PARAMS ((rtx
));
1003 extern void end_sequence
PARAMS ((void));
1004 extern rtx gen_sequence
PARAMS ((void));
1005 extern rtx immed_double_const
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
, enum machine_mode
));
1006 extern rtx force_const_mem
PARAMS ((enum machine_mode
, rtx
));
1007 extern rtx force_reg
PARAMS ((enum machine_mode
, rtx
));
1008 extern rtx get_pool_constant
PARAMS ((rtx
));
1009 extern enum machine_mode get_pool_mode
PARAMS ((rtx
));
1010 extern rtx get_pool_constant_for_function
PARAMS ((struct function
*, rtx
));
1011 extern enum machine_mode get_pool_mode_for_function
PARAMS ((struct function
*, rtx
));
1012 extern int get_pool_offset
PARAMS ((rtx
));
1013 extern rtx simplify_subtraction
PARAMS ((rtx
));
1014 extern rtx assign_stack_local
PARAMS ((enum machine_mode
,
1015 HOST_WIDE_INT
, int));
1016 extern rtx assign_stack_temp
PARAMS ((enum machine_mode
,
1017 HOST_WIDE_INT
, int));
1018 extern rtx assign_temp
PARAMS ((union tree_node
*,
1020 extern rtx protect_from_queue
PARAMS ((rtx
, int));
1021 extern void emit_queue
PARAMS ((void));
1022 extern rtx emit_move_insn
PARAMS ((rtx
, rtx
));
1023 extern rtx emit_insn_before
PARAMS ((rtx
, rtx
));
1024 extern rtx emit_jump_insn_before
PARAMS ((rtx
, rtx
));
1025 extern rtx emit_call_insn_before
PARAMS ((rtx
, rtx
));
1026 extern rtx emit_barrier_before
PARAMS ((rtx
));
1027 extern rtx emit_label_before
PARAMS ((rtx
, rtx
));
1028 extern rtx emit_note_before
PARAMS ((int, rtx
));
1029 extern rtx emit_insn_after
PARAMS ((rtx
, rtx
));
1030 extern rtx emit_jump_insn_after
PARAMS ((rtx
, rtx
));
1031 extern rtx emit_barrier_after
PARAMS ((rtx
));
1032 extern rtx emit_label_after
PARAMS ((rtx
, rtx
));
1033 extern rtx emit_note_after
PARAMS ((int, rtx
));
1034 extern rtx emit_line_note_after
PARAMS ((char *, int, rtx
));
1035 extern rtx emit_insn
PARAMS ((rtx
));
1036 extern rtx emit_insns
PARAMS ((rtx
));
1037 extern rtx emit_insns_before
PARAMS ((rtx
, rtx
));
1038 extern rtx emit_insns_after
PARAMS ((rtx
, rtx
));
1039 extern rtx emit_jump_insn
PARAMS ((rtx
));
1040 extern rtx emit_call_insn
PARAMS ((rtx
));
1041 extern rtx emit_label
PARAMS ((rtx
));
1042 extern rtx emit_barrier
PARAMS ((void));
1043 extern rtx emit_line_note
PARAMS ((char *, int));
1044 extern rtx emit_note
PARAMS ((char *, int));
1045 extern rtx emit_line_note_force
PARAMS ((char *, int));
1046 extern rtx make_insn_raw
PARAMS ((rtx
));
1047 extern rtx previous_insn
PARAMS ((rtx
));
1048 extern rtx next_insn
PARAMS ((rtx
));
1049 extern rtx prev_nonnote_insn
PARAMS ((rtx
));
1050 extern rtx next_nonnote_insn
PARAMS ((rtx
));
1051 extern rtx prev_real_insn
PARAMS ((rtx
));
1052 extern rtx next_real_insn
PARAMS ((rtx
));
1053 extern rtx prev_active_insn
PARAMS ((rtx
));
1054 extern rtx next_active_insn
PARAMS ((rtx
));
1055 extern int active_insn_p
PARAMS ((rtx
));
1056 extern rtx prev_label
PARAMS ((rtx
));
1057 extern rtx next_label
PARAMS ((rtx
));
1058 extern rtx next_cc0_user
PARAMS ((rtx
));
1059 extern rtx prev_cc0_setter
PARAMS ((rtx
));
1060 extern rtx next_nondeleted_insn
PARAMS ((rtx
));
1061 extern enum rtx_code reverse_condition
PARAMS ((enum rtx_code
));
1062 extern enum rtx_code reverse_condition_maybe_unordered
PARAMS ((enum rtx_code
));
1063 extern enum rtx_code swap_condition
PARAMS ((enum rtx_code
));
1064 extern enum rtx_code unsigned_condition
PARAMS ((enum rtx_code
));
1065 extern enum rtx_code signed_condition
PARAMS ((enum rtx_code
));
1066 extern rtx find_equiv_reg
PARAMS ((rtx
, rtx
, enum reg_class
, int, short *, int, enum machine_mode
));
1067 extern rtx squeeze_notes
PARAMS ((rtx
, rtx
));
1068 extern rtx delete_insn
PARAMS ((rtx
));
1069 extern void delete_jump
PARAMS ((rtx
));
1070 extern void delete_barrier
PARAMS ((rtx
));
1071 extern rtx get_label_before
PARAMS ((rtx
));
1072 extern rtx get_label_after
PARAMS ((rtx
));
1073 extern rtx follow_jumps
PARAMS ((rtx
));
1074 extern rtx adj_offsettable_operand
PARAMS ((rtx
, int));
1075 extern rtx try_split
PARAMS ((rtx
, rtx
, int));
1076 extern rtx split_insns
PARAMS ((rtx
, rtx
));
1077 extern rtx simplify_unary_operation
PARAMS ((enum rtx_code
, enum machine_mode
, rtx
, enum machine_mode
));
1078 extern rtx simplify_binary_operation
PARAMS ((enum rtx_code
, enum machine_mode
, rtx
, rtx
));
1079 extern rtx simplify_ternary_operation
PARAMS ((enum rtx_code
, enum machine_mode
, enum machine_mode
, rtx
, rtx
, rtx
));
1080 extern rtx simplify_relational_operation
PARAMS ((enum rtx_code
, enum machine_mode
, rtx
, rtx
));
1081 extern rtx simplify_gen_binary
PARAMS ((enum rtx_code
, enum machine_mode
,
1083 extern rtx simplify_rtx
PARAMS ((rtx
));
1084 extern rtx gen_move_insn
PARAMS ((rtx
, rtx
));
1085 extern rtx gen_jump
PARAMS ((rtx
));
1086 extern rtx gen_beq
PARAMS ((rtx
));
1087 extern rtx gen_bge
PARAMS ((rtx
));
1088 extern rtx gen_ble
PARAMS ((rtx
));
1089 extern rtx gen_mem_addressof
PARAMS ((rtx
, union tree_node
*));
1090 extern rtx eliminate_constant_term
PARAMS ((rtx
, rtx
*));
1091 extern rtx expand_complex_abs
PARAMS ((enum machine_mode
, rtx
, rtx
, int));
1092 extern enum machine_mode choose_hard_reg_mode
PARAMS ((int, int));
1093 extern void set_unique_reg_note
PARAMS ((rtx
, enum reg_note
, rtx
));
1095 /* Functions in rtlanal.c */
1097 extern int rtx_unstable_p
PARAMS ((rtx
));
1098 extern int rtx_varies_p
PARAMS ((rtx
));
1099 extern int rtx_addr_varies_p
PARAMS ((rtx
));
1100 extern HOST_WIDE_INT get_integer_term
PARAMS ((rtx
));
1101 extern rtx get_related_value
PARAMS ((rtx
));
1102 extern int reg_mentioned_p
PARAMS ((rtx
, rtx
));
1103 extern int reg_referenced_p
PARAMS ((rtx
, rtx
));
1104 extern int reg_used_between_p
PARAMS ((rtx
, rtx
, rtx
));
1105 extern int reg_referenced_between_p
PARAMS ((rtx
, rtx
, rtx
));
1106 extern int reg_set_between_p
PARAMS ((rtx
, rtx
, rtx
));
1107 extern int regs_set_between_p
PARAMS ((rtx
, rtx
, rtx
));
1108 extern int modified_between_p
PARAMS ((rtx
, rtx
, rtx
));
1109 extern int no_labels_between_p
PARAMS ((rtx
, rtx
));
1110 extern int no_jumps_between_p
PARAMS ((rtx
, rtx
));
1111 extern int modified_in_p
PARAMS ((rtx
, rtx
));
1112 extern int reg_set_p
PARAMS ((rtx
, rtx
));
1113 extern rtx single_set
PARAMS ((rtx
));
1114 extern int multiple_sets
PARAMS ((rtx
));
1115 extern rtx find_last_value
PARAMS ((rtx
, rtx
*, rtx
, int));
1116 extern int refers_to_regno_p
PARAMS ((int, int, rtx
, rtx
*));
1117 extern int reg_overlap_mentioned_p
PARAMS ((rtx
, rtx
));
1118 extern void note_stores
PARAMS ((rtx
, void (*)(rtx
, rtx
, void *), void *));
1119 extern rtx reg_set_last
PARAMS ((rtx
, rtx
));
1120 extern int dead_or_set_p
PARAMS ((rtx
, rtx
));
1121 extern int dead_or_set_regno_p
PARAMS ((rtx
, int));
1122 extern rtx find_reg_note
PARAMS ((rtx
, enum reg_note
, rtx
));
1123 extern rtx find_regno_note
PARAMS ((rtx
, enum reg_note
, int));
1124 extern int find_reg_fusage
PARAMS ((rtx
, enum rtx_code
, rtx
));
1125 extern int find_regno_fusage
PARAMS ((rtx
, enum rtx_code
, int));
1126 extern void remove_note
PARAMS ((rtx
, rtx
));
1127 extern int side_effects_p
PARAMS ((rtx
));
1128 extern int volatile_refs_p
PARAMS ((rtx
));
1129 extern int volatile_insn_p
PARAMS ((rtx
));
1130 extern int may_trap_p
PARAMS ((rtx
));
1131 extern int inequality_comparisons_p
PARAMS ((rtx
));
1132 extern rtx replace_rtx
PARAMS ((rtx
, rtx
, rtx
));
1133 extern rtx replace_regs
PARAMS ((rtx
, rtx
*, int, int));
1134 extern int computed_jump_p
PARAMS ((rtx
));
1135 typedef int (*rtx_function
) PARAMS ((rtx
*, void *));
1136 extern int for_each_rtx
PARAMS ((rtx
*, rtx_function
, void *));
1137 extern rtx regno_use_in
PARAMS ((int, rtx
));
1138 extern int auto_inc_p
PARAMS ((rtx
));
1139 extern void remove_node_from_expr_list
PARAMS ((rtx
, rtx
*));
1140 extern int insns_safe_to_move_p
PARAMS ((rtx
, rtx
, rtx
*));
1144 extern rtx find_use_as_address
PARAMS ((rtx
, rtx
, HOST_WIDE_INT
));
1145 void init_EXPR_INSN_LIST_cache
PARAMS ((void));
1146 void free_EXPR_LIST_list
PARAMS ((rtx
*));
1147 void free_INSN_LIST_list
PARAMS ((rtx
*));
1148 void free_EXPR_LIST_node
PARAMS ((rtx
));
1149 void free_INSN_LIST_node
PARAMS ((rtx
));
1150 rtx alloc_INSN_LIST
PARAMS ((rtx
, rtx
));
1151 rtx alloc_EXPR_LIST
PARAMS ((int, rtx
, rtx
));
1155 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1156 Always at least 3, since the combiner could put that many togetherm
1157 and we want this to remain correct for all the remaining passes. */
1159 extern int max_parallel
;
1161 /* Free up register info memory. */
1162 extern void free_reg_info
PARAMS ((void));
1165 extern int asm_noperands
PARAMS ((rtx
));
1166 extern char *decode_asm_operands
PARAMS ((rtx
, rtx
*, rtx
**,
1168 enum machine_mode
*));
1170 extern enum reg_class reg_preferred_class
PARAMS ((int));
1171 extern enum reg_class reg_alternate_class
PARAMS ((int));
1173 extern rtx get_first_nonparm_insn
PARAMS ((void));
1175 extern void split_all_insns
PARAMS ((int));
1177 #define MAX_SAVED_CONST_INT 64
1178 extern rtx const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1180 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1181 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1182 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1183 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1184 extern rtx const_true_rtx
;
1186 extern rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1188 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1189 same as VOIDmode. */
1191 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1193 /* Likewise, for the constants 1 and 2. */
1195 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1196 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1198 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1199 is used to represent the frame pointer. This is because the
1200 hard frame pointer and the automatic variables are separated by an amount
1201 that cannot be determined until after register allocation. We can assume
1202 that in this case ELIMINABLE_REGS will be defined, one action of which
1203 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1204 #ifndef HARD_FRAME_POINTER_REGNUM
1205 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1208 /* Index labels for global_rtl. */
1209 enum global_rtl_index
1215 /* For register elimination to work properly these hard_frame_pointer_rtx,
1216 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1217 the same register. */
1218 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1219 GR_ARG_POINTER
= GR_FRAME_POINTER
,
1221 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1222 GR_HARD_FRAME_POINTER
= GR_FRAME_POINTER
,
1224 GR_HARD_FRAME_POINTER
,
1226 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1227 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1228 GR_ARG_POINTER
= GR_HARD_FRAME_POINTER
,
1233 GR_VIRTUAL_INCOMING_ARGS
,
1234 GR_VIRTUAL_STACK_ARGS
,
1235 GR_VIRTUAL_STACK_DYNAMIC
,
1236 GR_VIRTUAL_OUTGOING_ARGS
,
1242 /* Pointers to standard pieces of rtx are stored here. */
1243 extern rtx global_rtl
[GR_MAX
];
1245 /* Standard pieces of rtx, to be substituted directly into things. */
1246 #define pc_rtx (global_rtl[GR_PC])
1247 #define cc0_rtx (global_rtl[GR_CC0])
1249 /* All references to certain hard regs, except those created
1250 by allocating pseudo regs into them (when that's possible),
1251 go through these unique rtx objects. */
1252 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1253 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1254 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1255 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1257 extern rtx pic_offset_table_rtx
;
1258 extern rtx struct_value_rtx
;
1259 extern rtx struct_value_incoming_rtx
;
1260 extern rtx static_chain_rtx
;
1261 extern rtx static_chain_incoming_rtx
;
1262 extern rtx return_address_pointer_rtx
;
1264 /* Include the RTL generation functions. */
1270 /* There are some RTL codes that require special attention; the
1271 generation functions included above do the raw handling. If you
1272 add to this list, modify special_rtx in gengenrtl.c as well. You
1273 should also modify gen_rtx to use the special function. */
1275 extern rtx gen_rtx_CONST_DOUBLE
PARAMS ((enum machine_mode
, rtx
,
1276 HOST_WIDE_INT
, HOST_WIDE_INT
));
1277 extern rtx gen_rtx_CONST_INT
PARAMS ((enum machine_mode
, HOST_WIDE_INT
));
1278 extern rtx gen_rtx_REG
PARAMS ((enum machine_mode
, int));
1279 extern rtx gen_rtx_MEM
PARAMS ((enum machine_mode
, rtx
));
1281 /* We need the cast here to ensure that we get the same result both with
1282 and without prototypes. */
1283 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1285 /* Virtual registers are used during RTL generation to refer to locations into
1286 the stack frame when the actual location isn't known until RTL generation
1287 is complete. The routine instantiate_virtual_regs replaces these with
1288 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1291 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1293 /* This points to the first word of the incoming arguments passed on the stack,
1294 either by the caller or by the callee when pretending it was passed by the
1297 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1299 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1301 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1302 variable on the stack. Otherwise, it points to the first variable on
1305 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1307 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1309 /* This points to the location of dynamically-allocated memory on the stack
1310 immediately after the stack pointer has been adjusted by the amount
1313 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1315 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1317 /* This points to the location in the stack at which outgoing arguments should
1318 be written when the stack is pre-pushed (arguments pushed using push
1319 insns always use sp). */
1321 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1323 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1325 /* This points to the Canonical Frame Address of the function. This
1326 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1327 but is calculated relative to the arg pointer for simplicity; the
1328 frame pointer nor stack pointer are necessarily fixed relative to
1329 the CFA until after reload. */
1331 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1333 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1335 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1337 extern rtx find_next_ref
PARAMS ((rtx
, rtx
));
1338 extern rtx
*find_single_use
PARAMS ((rtx
, rtx
, rtx
*));
1340 extern rtx output_constant_def
PARAMS ((union tree_node
*));
1341 extern rtx immed_real_const
PARAMS ((union tree_node
*));
1342 extern union tree_node
*make_tree
PARAMS ((union tree_node
*, rtx
));
1344 /* Define a default value for STORE_FLAG_VALUE. */
1346 #ifndef STORE_FLAG_VALUE
1347 #define STORE_FLAG_VALUE 1
1350 /* Nonzero after the second flow pass has completed.
1351 Set to 1 or 0 by toplev.c */
1352 extern int flow2_completed
;
1354 /* Nonzero after end of reload pass.
1355 Set to 1 or 0 by reload1.c. */
1357 extern int reload_completed
;
1359 /* Set to 1 while reload_as_needed is operating.
1360 Required by some machines to handle any generated moves differently. */
1362 extern int reload_in_progress
;
1364 /* If this is nonzero, we do not bother generating VOLATILE
1365 around volatile memory references, and we are willing to
1366 output indirect addresses. If cse is to follow, we reject
1367 indirect addresses so a useful potential cse is generated;
1368 if it is used only once, instruction combination will produce
1369 the same indirect address eventually. */
1370 extern int cse_not_expected
;
1372 /* Set to nonzero before life analysis to indicate that it is unsafe to
1373 generate any new pseudo registers. */
1374 extern int no_new_pseudos
;
1376 /* Translates rtx code to tree code, for those codes needed by
1377 REAL_ARITHMETIC. The function returns an int because the caller may not
1378 know what `enum tree_code' means. */
1380 extern int rtx_to_tree_code
PARAMS ((enum rtx_code
));
1383 extern void obfree
PARAMS ((char *));
1385 extern void gcc_obstack_init
PARAMS ((struct obstack
*));
1386 extern void pop_obstacks
PARAMS ((void));
1387 extern void push_obstacks
PARAMS ((struct obstack
*,
1390 struct cse_basic_block_data
;
1391 extern int rtx_cost
PARAMS ((rtx
, enum rtx_code
));
1392 extern void delete_trivially_dead_insns
PARAMS ((rtx
, int));
1394 extern int cse_main
PARAMS ((rtx
, int, int, FILE *));
1396 extern void cse_end_of_basic_block
PARAMS ((rtx
,
1397 struct cse_basic_block_data
*,
1401 extern int comparison_dominates_p
PARAMS ((enum rtx_code
, enum rtx_code
));
1402 extern int condjump_p
PARAMS ((rtx
));
1403 extern rtx condjump_label
PARAMS ((rtx
));
1404 extern int simplejump_p
PARAMS ((rtx
));
1405 extern int returnjump_p
PARAMS ((rtx
));
1406 extern int onlyjump_p
PARAMS ((rtx
));
1407 extern int sets_cc0_p
PARAMS ((rtx
));
1408 extern int invert_jump
PARAMS ((rtx
, rtx
));
1409 extern int rtx_renumbered_equal_p
PARAMS ((rtx
, rtx
));
1410 extern int true_regnum
PARAMS ((rtx
));
1411 extern int redirect_jump
PARAMS ((rtx
, rtx
));
1412 extern void jump_optimize
PARAMS ((rtx
, int, int, int));
1413 extern void rebuild_jump_labels
PARAMS ((rtx
));
1414 extern void thread_jumps
PARAMS ((rtx
, int, int));
1415 extern int redirect_exp
PARAMS ((rtx
*, rtx
, rtx
, rtx
));
1416 extern int rtx_equal_for_thread_p
PARAMS ((rtx
, rtx
, rtx
));
1417 extern int invert_exp
PARAMS ((rtx
, rtx
));
1418 extern int can_reverse_comparison_p
PARAMS ((rtx
, rtx
));
1419 extern void delete_for_peephole
PARAMS ((rtx
, rtx
));
1420 extern int condjump_in_parallel_p
PARAMS ((rtx
));
1421 extern void never_reached_warning
PARAMS ((rtx
));
1423 /* Flags for jump_optimize() */
1424 #define JUMP_CROSS_JUMP 1
1425 #define JUMP_CROSS_JUMP_DEATH_MATTERS 2
1426 #define JUMP_NOOP_MOVES 1
1427 #define JUMP_AFTER_REGSCAN 1
1429 /* In emit-rtl.c. */
1430 extern int max_reg_num
PARAMS ((void));
1431 extern int max_label_num
PARAMS ((void));
1432 extern int get_first_label_num
PARAMS ((void));
1433 extern void delete_insns_since
PARAMS ((rtx
));
1434 extern void mark_reg_pointer
PARAMS ((rtx
, int));
1435 extern void mark_user_reg
PARAMS ((rtx
));
1436 extern void reset_used_flags
PARAMS ((rtx
));
1437 extern void reorder_insns
PARAMS ((rtx
, rtx
, rtx
));
1438 extern int get_max_uid
PARAMS ((void));
1439 extern int in_sequence_p
PARAMS ((void));
1440 extern void force_next_line_note
PARAMS ((void));
1441 extern void clear_emit_caches
PARAMS ((void));
1442 extern void init_emit
PARAMS ((void));
1443 extern void init_emit_once
PARAMS ((int));
1444 extern void push_topmost_sequence
PARAMS ((void));
1445 extern void pop_topmost_sequence
PARAMS ((void));
1446 extern int subreg_realpart_p
PARAMS ((rtx
));
1447 extern void reverse_comparison
PARAMS ((rtx
));
1448 extern void set_new_first_and_last_insn
PARAMS ((rtx
, rtx
));
1449 extern void set_new_first_and_last_label_num
PARAMS ((int, int));
1450 extern void set_new_last_label_num
PARAMS ((int));
1451 extern void unshare_all_rtl_again
PARAMS ((rtx
));
1452 extern void set_last_insn
PARAMS ((rtx
));
1453 extern void link_cc0_insns
PARAMS ((rtx
));
1454 extern void add_insn
PARAMS ((rtx
));
1455 extern void add_insn_before
PARAMS ((rtx
, rtx
));
1456 extern void add_insn_after
PARAMS ((rtx
, rtx
));
1457 extern void remove_insn
PARAMS ((rtx
));
1458 extern void reorder_insns_with_line_notes
PARAMS ((rtx
, rtx
, rtx
));
1459 extern void emit_insn_after_with_line_notes
PARAMS ((rtx
, rtx
, rtx
));
1460 extern enum rtx_code classify_insn
PARAMS ((rtx
));
1461 extern rtx emit
PARAMS ((rtx
));
1462 /* Query and clear/ restore no_line_numbers. This is used by the
1463 switch / case handling in stmt.c to give proper line numbers in
1464 warnings about unreachable code. */
1465 int force_line_numbers
PARAMS ((void));
1466 void restore_line_number_status
PARAMS ((int old_value
));
1467 extern void renumber_insns
PARAMS ((FILE *));
1468 extern void remove_unncessary_notes
PARAMS ((void));
1470 /* In insn-emit.c */
1471 extern void add_clobbers
PARAMS ((rtx
, int));
1474 extern int combine_instructions
PARAMS ((rtx
, int));
1475 extern int extended_count
PARAMS ((rtx
, enum machine_mode
, int));
1476 extern rtx remove_death
PARAMS ((int, rtx
));
1478 extern void dump_combine_stats
PARAMS ((FILE *));
1479 extern void dump_combine_total_stats
PARAMS ((FILE *));
1484 extern void schedule_insns
PARAMS ((FILE *));
1486 extern void fix_sched_param
PARAMS ((const char *, const char *));
1488 /* In print-rtl.c */
1489 extern void debug_rtx
PARAMS ((rtx
));
1490 extern void debug_rtx_list
PARAMS ((rtx
, int));
1491 extern rtx debug_rtx_find
PARAMS ((rtx
, int));
1493 extern void print_rtl
PARAMS ((FILE *, rtx
));
1494 extern int print_rtl_single
PARAMS ((FILE *, rtx
));
1495 extern void print_inline_rtx
PARAMS ((FILE *, rtx
, int));
1499 extern void init_loop
PARAMS ((void));
1500 extern rtx libcall_other_reg
PARAMS ((rtx
, rtx
));
1502 extern void loop_optimize
PARAMS ((rtx
, FILE *, int, int));
1504 extern void record_excess_regs
PARAMS ((rtx
, rtx
, rtx
*));
1507 extern void reposition_prologue_and_epilogue_notes
PARAMS ((rtx
));
1508 extern void thread_prologue_and_epilogue_insns
PARAMS ((rtx
));
1509 extern int prologue_epilogue_contains
PARAMS ((rtx
));
1510 extern HOST_WIDE_INT get_frame_size
PARAMS ((void));
1511 extern void preserve_rtl_expr_result
PARAMS ((rtx
));
1512 extern void mark_temp_addr_taken
PARAMS ((rtx
));
1513 extern void update_temp_slot_address
PARAMS ((rtx
, rtx
));
1514 extern void purge_addressof
PARAMS ((rtx
));
1517 extern int operands_match_p
PARAMS ((rtx
, rtx
));
1518 extern int safe_from_earlyclobber
PARAMS ((rtx
, rtx
));
1521 extern void set_file_and_line_for_stmt
PARAMS ((const char *, int));
1522 extern void expand_null_return
PARAMS ((void));
1523 extern void emit_jump
PARAMS ((rtx
));
1524 extern int preserve_subexpressions_p
PARAMS ((void));
1527 extern void init_expr_once
PARAMS ((void));
1528 extern void move_by_pieces
PARAMS ((rtx
, rtx
, int, unsigned int));
1533 extern void stupid_life_analysis
PARAMS ((rtx
, int, FILE *));
1537 extern void allocate_bb_life_data
PARAMS ((void));
1538 extern void allocate_reg_life_data
PARAMS ((void));
1539 extern void recompute_reg_usage
PARAMS ((rtx
, int));
1541 extern void print_rtl_with_bb
PARAMS ((FILE *, rtx
));
1542 extern void dump_flow_info
PARAMS ((FILE *));
1546 extern void init_expmed
PARAMS ((void));
1547 extern void expand_inc
PARAMS ((rtx
, rtx
));
1548 extern void expand_dec
PARAMS ((rtx
, rtx
));
1549 extern rtx expand_mult_highpart
PARAMS ((enum machine_mode
, rtx
,
1550 unsigned HOST_WIDE_INT
, rtx
,
1555 extern int gcse_main
PARAMS ((rtx
, FILE *));
1559 extern void mark_elimination
PARAMS ((int, int));
1561 extern int global_alloc
PARAMS ((FILE *));
1562 extern void dump_global_regs
PARAMS ((FILE *));
1565 extern void retry_global_alloc
PARAMS ((int, HARD_REG_SET
));
1567 extern void build_insn_chain
PARAMS ((rtx
));
1570 extern int reg_classes_intersect_p
PARAMS ((enum reg_class
, enum reg_class
));
1571 extern int reg_class_subset_p
PARAMS ((enum reg_class
, enum reg_class
));
1572 extern void globalize_reg
PARAMS ((int));
1573 extern void init_regs
PARAMS ((void));
1574 extern void init_reg_sets
PARAMS ((void));
1575 extern void regset_release_memory
PARAMS ((void));
1576 extern void regclass_init
PARAMS ((void));
1577 extern void regclass
PARAMS ((rtx
, int, FILE *));
1578 extern void reg_scan
PARAMS ((rtx
, int, int));
1579 extern void reg_scan_update
PARAMS ((rtx
, rtx
, int));
1580 extern void fix_register
PARAMS ((const char *, int, int));
1582 extern void delete_null_pointer_checks
PARAMS ((rtx
));
1586 extern void regmove_optimize
PARAMS ((rtx
, int, FILE *));
1591 extern void dbr_schedule
PARAMS ((rtx
, FILE *));
1595 extern void init_optabs
PARAMS ((void));
1597 /* In local-alloc.c */
1599 extern void dump_local_alloc
PARAMS ((FILE *));
1601 extern int local_alloc
PARAMS ((void));
1602 extern int function_invariant_p
PARAMS ((rtx
));
1605 extern void reload_cse_regs
PARAMS ((rtx
));
1606 extern void init_reload
PARAMS ((void));
1607 extern void mark_home_live
PARAMS ((int));
1609 extern int reload
PARAMS ((rtx
, int, FILE *));
1612 /* In caller-save.c */
1613 extern void init_caller_save
PARAMS ((void));
1616 extern void init_branch_prob
PARAMS ((const char *));
1618 extern void branch_prob
PARAMS ((rtx
, FILE *));
1619 extern void end_branch_prob
PARAMS ((FILE *));
1621 extern void output_func_start_profiler
PARAMS ((void));
1623 /* In reg-stack.c */
1625 extern void reg_to_stack
PARAMS ((rtx
, FILE *));
1628 /* In fold-const.c */
1629 extern int add_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1630 HOST_WIDE_INT
, HOST_WIDE_INT
,
1631 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1632 extern int neg_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1633 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1634 extern int mul_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1635 HOST_WIDE_INT
, HOST_WIDE_INT
,
1636 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1637 extern void lshift_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1638 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1639 HOST_WIDE_INT
*, int));
1640 extern void rshift_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1642 HOST_WIDE_INT
*, HOST_WIDE_INT
*, int));
1643 extern void lrotate_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1644 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1646 extern void rrotate_double
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1647 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1651 extern void emit_library_call
PARAMS ((rtx
, int, enum machine_mode
,
1653 extern rtx emit_library_call_value
PARAMS ((rtx
, rtx
, int,
1658 extern int set_dominates_use
PARAMS ((int, int, int, rtx
, rtx
));
1661 extern void bss_section
PARAMS ((void));
1662 extern int in_data_section
PARAMS ((void));
1663 extern int supports_one_only
PARAMS ((void));
1664 extern void init_varasm_once
PARAMS ((void));
1667 extern void init_rtl
PARAMS ((void));
1668 extern void rtx_free
PARAMS ((rtx
));
1671 extern int read_skip_spaces
PARAMS ((FILE *));
1672 extern rtx read_rtx
PARAMS ((FILE *));
1675 extern const char *read_rtx_filename
;
1676 extern int read_rtx_lineno
;
1678 /* Redefine abort to report an internal error w/o coredump, and
1679 reporting the location of the error in the source file. This logic
1680 is duplicated in rtl.h and tree.h because every file that needs the
1681 special abort includes one or both. toplev.h gets too few files,
1682 system.h gets too many. */
1684 extern void fancy_abort
PARAMS ((const char *, int, const char *))
1686 #if (GCC_VERSION >= 2007)
1687 #define abort() fancy_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
1689 #define abort() fancy_abort (__FILE__, __LINE__, 0)
1693 extern int true_dependence
PARAMS ((rtx
, enum machine_mode
, rtx
,
1695 extern int read_dependence
PARAMS ((rtx
, rtx
));
1696 extern int anti_dependence
PARAMS ((rtx
, rtx
));
1697 extern int output_dependence
PARAMS ((rtx
, rtx
));
1698 extern void mark_constant_function
PARAMS ((void));
1699 extern void init_alias_once
PARAMS ((void));
1700 extern void init_alias_analysis
PARAMS ((void));
1701 extern void end_alias_analysis
PARAMS ((void));
1703 extern void record_base_value
PARAMS ((int, rtx
, int));
1704 extern void record_alias_subset
PARAMS ((int, int));
1705 extern rtx addr_side_effect_eval
PARAMS ((rtx
, int, int));
1708 extern int stack_regs_mentioned
PARAMS ((rtx insn
));
1713 extern rtx stack_limit_rtx
;