1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 91-98, 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
26 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
27 #undef FLOAT /* Likewise. */
28 #undef ABS /* Likewise. */
29 #undef PC /* Likewise. */
35 /* Register Transfer Language EXPRESSIONS CODES */
37 #define RTX_CODE enum rtx_code
40 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
41 #include "rtl.def" /* rtl expressions are documented here */
44 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
46 Assumes default enum value assignment. */
48 #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
49 /* The cast here, saves many elsewhere. */
51 extern const int rtx_length[];
52 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
54 extern const char * const rtx_name[];
55 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
57 extern const char * const rtx_format[];
58 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
60 extern const char rtx_class[];
61 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
63 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
64 relative to which the offsets are calculated, as explained in rtl.def. */
67 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
68 unsigned min_align: 8;
70 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
71 unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
72 unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
73 unsigned min_after_base: 1; /* minimum address target label is after BASE. */
74 unsigned max_after_base: 1; /* maximum address target label is after BASE. */
75 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
76 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
79 } addr_diff_vec_flags;
81 /* Common union for an element of an rtx. */
83 typedef union rtunion_def
89 struct rtvec_def *rtvec;
90 enum machine_mode rttype;
91 addr_diff_vec_flags rt_addr_diff_vec_flags;
92 struct bitmap_head_def *rtbit;
93 union tree_node *rttree;
94 struct basic_block_def *bb;
97 /* RTL expression ("rtx"). */
99 typedef struct rtx_def
101 #ifdef ONLY_INT_FIELDS
102 #ifdef CODE_FIELD_BUG
103 unsigned int code : 16;
108 /* The kind of expression this is. */
109 enum rtx_code code : 16;
111 /* The kind of value the expression has. */
112 #ifdef ONLY_INT_FIELDS
115 enum machine_mode mode : 8;
117 /* LINK_COST_ZERO in an INSN_LIST. */
118 unsigned int jump : 1;
119 /* LINK_COST_FREE in an INSN_LIST. */
120 unsigned int call : 1;
121 /* 1 in a MEM or REG if value of this expression will never change
122 during the current function, even though it is not
124 1 in a SUBREG if it is from a promoted variable that is unsigned.
125 1 in a SYMBOL_REF if it addresses something in the per-function
127 1 in a CALL_INSN if it is a const call.
128 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
129 reorg until end of compilation; cleared before used. */
130 unsigned int unchanging : 1;
131 /* 1 in a MEM expression if contents of memory are volatile.
132 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
134 1 in a REG expression if corresponds to a variable declared by the user.
135 0 for an internally generated temporary.
136 In a SYMBOL_REF, this flag is used for machine-specific purposes.
137 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
138 unsigned int volatil : 1;
139 /* 1 in a MEM referring to a field of an aggregate.
140 0 if the MEM was a variable or the result of a * operator in C;
141 1 if it was the result of a . or -> operator (on a struct) in C.
142 1 in a REG if the register is used only in exit code a loop.
143 1 in a SUBREG expression if was generated from a variable with a
145 1 in a CODE_LABEL if the label is used for nonlocal gotos
146 and must not be deleted even if its count is zero.
147 1 in a LABEL_REF if this is a reference to a label outside the
149 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
150 together with the preceding insn. Valid only within sched.
151 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
152 from the target of a branch. Valid from reorg until end of compilation;
153 cleared before used. */
154 unsigned int in_struct : 1;
155 /* 1 if this rtx is used. This is used for copying shared structure.
156 See `unshare_all_rtl'.
157 In a REG, this is not needed for that purpose, and used instead
158 in `leaf_renumber_regs_insn'.
159 In a SYMBOL_REF, means that emit_library_call
160 has used it as the function. */
161 unsigned int used : 1;
162 /* Nonzero if this rtx came from procedure integration.
163 In a REG, nonzero means this reg refers to the return value
164 of the current function. */
165 unsigned integrated : 1;
166 /* 1 in an INSN or a SET if this rtx is related to the call frame,
167 either changing how we compute the frame address or saving and
168 restoring registers in the prologue and epilogue.
169 1 in a MEM if the MEM refers to a scalar, rather than a member of
171 unsigned frame_related : 1;
172 /* The first element of the operands of this rtx.
173 The number of operands and their types are controlled
174 by the `code' field, according to rtl.def. */
178 #define NULL_RTX (rtx) 0
180 /* Define macros to access the `code' field of the rtx. */
182 #ifdef SHORT_ENUM_BUG
183 #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
184 #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
186 #define GET_CODE(RTX) ((RTX)->code)
187 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
190 #define GET_MODE(RTX) ((RTX)->mode)
191 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
193 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
194 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
195 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
197 /* RTL vector. These appear inside RTX's when there is a need
198 for a variable number of things. The principle use is inside
199 PARALLEL expressions. */
201 typedef struct rtvec_def{
202 int num_elem; /* number of elements */
203 struct rtx_def *elem[1];
206 #define NULL_RTVEC (rtvec) 0
208 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
209 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
211 /* 1 if X is a REG. */
213 #define REG_P(X) (GET_CODE (X) == REG)
215 /* 1 if X is a constant value that is an integer. */
217 #define CONSTANT_P(X) \
218 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
219 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
220 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
221 || GET_CODE (X) == CONSTANT_P_RTX)
223 /* General accessor macros for accessing the fields of an rtx. */
225 #if defined ENABLE_CHECKING && (__GNUC__ > 2 || __GNUC_MINOR__ > 6)
226 /* The bit with a star outside the statement expr and an & inside is
227 so that N can be evaluated only once. */
228 #define RTL_CHECK1(RTX, N, C1) \
229 (*({ rtx _rtx = (RTX); int _n = (N); \
230 enum rtx_code _code = GET_CODE (_rtx); \
231 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
232 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
233 __PRETTY_FUNCTION__); \
234 if (GET_RTX_FORMAT(_code)[_n] != C1) \
235 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
236 __PRETTY_FUNCTION__); \
239 #define RTL_CHECK2(RTX, N, C1, C2) \
240 (*({ rtx _rtx = (RTX); int _n = (N); \
241 enum rtx_code _code = GET_CODE (_rtx); \
242 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
243 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
244 __PRETTY_FUNCTION__); \
245 if (GET_RTX_FORMAT(_code)[_n] != C1 \
246 && GET_RTX_FORMAT(_code)[_n] != C2) \
247 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
248 __PRETTY_FUNCTION__); \
251 #define RTL_CHECKC1(RTX, N, C) \
252 (*({ rtx _rtx = (RTX); int _n = (N); \
253 if (GET_CODE (_rtx) != C) \
254 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, \
255 __PRETTY_FUNCTION__); \
258 #define RTL_CHECKC2(RTX, N, C1, C2) \
259 (*({ rtx _rtx = (RTX); int _n = (N); \
260 enum rtx_code _code = GET_CODE (_rtx); \
261 if (_code != C1 && _code != C2) \
262 rtl_check_failed_code2 (_rtx, C1, C2, __FILE__, __LINE__, \
263 __PRETTY_FUNCTION__); \
266 #define RTVEC_ELT(RTVEC, I) \
267 (*({ rtvec _rtvec = (RTVEC); int _i = (I); \
268 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
269 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
270 __PRETTY_FUNCTION__); \
271 &_rtvec->elem[_i]; }))
273 extern void rtl_check_failed_bounds PROTO((rtx, int,
274 const char *, int, const char *))
276 extern void rtl_check_failed_type1 PROTO((rtx, int, int,
277 const char *, int, const char *))
279 extern void rtl_check_failed_type2 PROTO((rtx, int, int, int,
280 const char *, int, const char *))
282 extern void rtl_check_failed_code1 PROTO((rtx, enum rtx_code,
283 const char *, int, const char *))
285 extern void rtl_check_failed_code2 PROTO((rtx, enum rtx_code, enum rtx_code,
286 const char *, int, const char *))
288 extern void rtvec_check_failed_bounds PROTO((rtvec, int,
289 const char *, int, const char *))
292 #else /* not ENABLE_CHECKING */
294 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
295 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
296 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
297 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
298 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
302 #define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
303 #define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
304 #define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
305 #define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
306 #define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
307 #define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
308 #define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
309 #define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
310 #define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
312 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
313 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
315 /* These are like XWINT, etc. except that they expect a '0' field instead
316 of the normal type code. */
318 #define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
319 #define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
320 #define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
321 #define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
322 #define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
323 #define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
324 #define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
325 #define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
326 #define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
327 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
329 #define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
330 #define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
331 #define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
332 #define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
333 #define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
334 #define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
335 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
336 #define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
337 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
338 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
340 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
341 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
343 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
345 /* ACCESS MACROS for particular fields of insns. */
347 /* Holds a unique number for each insn.
348 These are not necessarily sequentially increasing. */
349 #define INSN_UID(INSN) XINT(INSN, 0)
351 /* Chain insns together in sequence. */
352 #define PREV_INSN(INSN) XEXP(INSN, 1)
353 #define NEXT_INSN(INSN) XEXP(INSN, 2)
355 /* The body of an insn. */
356 #define PATTERN(INSN) XEXP(INSN, 3)
358 /* Code number of instruction, from when it was recognized.
359 -1 means this instruction has not been recognized yet. */
360 #define INSN_CODE(INSN) XINT(INSN, 4)
362 /* Set up in flow.c; empty before then.
363 Holds a chain of INSN_LIST rtx's whose first operands point at
364 previous insns with direct data-flow connections to this one.
365 That means that those insns set variables whose next use is in this insn.
366 They are always in the same basic block as this insn. */
367 #define LOG_LINKS(INSN) XEXP(INSN, 5)
369 /* 1 if insn has been deleted. */
370 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
372 /* 1 if insn is a call to a const function. */
373 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
375 /* 1 if insn is a branch that should not unconditionally execute its
376 delay slots, i.e., it is an annulled branch. */
377 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
379 /* 1 if insn is in a delay slot and is from the target of the branch. If
380 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
381 executed if the branch is taken. For annulled branches with this bit
382 clear, the insn should be executed only if the branch is not taken. */
383 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
385 /* Holds a list of notes on what this insn does to various REGs.
386 It is a chain of EXPR_LIST rtx's, where the second operand
387 is the chain pointer and the first operand is the REG being described.
388 The mode field of the EXPR_LIST contains not a real machine mode
389 but a value that says what this note says about the REG:
390 REG_DEAD means that the value in REG dies in this insn (i.e., it is
391 not needed past this insn). If REG is set in this insn, the REG_DEAD
392 note may, but need not, be omitted.
393 REG_INC means that the REG is autoincremented or autodecremented.
394 REG_EQUIV describes the insn as a whole; it says that the insn
395 sets a register to a constant value or to be equivalent to a memory
396 address. If the register is spilled to the stack then the constant
397 value should be substituted for it. The contents of the REG_EQUIV
398 is the constant value or memory address, which may be different
399 from the source of the SET although it has the same value. A
400 REG_EQUIV note may also appear on an insn which copies a register
401 parameter to a pseudo-register, if there is a memory address which
402 could be used to hold that pseudo-register throughout the function.
403 REG_EQUAL is like REG_EQUIV except that the destination
404 is only momentarily equal to the specified rtx. Therefore, it
405 cannot be used for substitution; but it can be used for cse.
406 REG_RETVAL means that this insn copies the return-value of
407 a library call out of the hard reg for return values. This note
408 is actually an INSN_LIST and it points to the first insn involved
409 in setting up arguments for the call. flow.c uses this to delete
410 the entire library call when its result is dead.
411 REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
412 of the library call and points at the one that has the REG_RETVAL.
413 REG_WAS_0 says that the register set in this insn held 0 before the insn.
414 The contents of the note is the insn that stored the 0.
415 If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
416 The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
417 REG_NONNEG means that the register is always nonnegative during
418 the containing loop. This is used in branches so that decrement and
419 branch instructions terminating on zero can be matched. There must be
420 an insn pattern in the md file named `decrement_and_branch_until_zero'
421 or else this will never be added to any instructions.
422 REG_NO_CONFLICT means there is no conflict *after this insn*
423 between the register in the note and the destination of this insn.
424 REG_UNUSED identifies a register set in this insn and never used.
425 REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
426 CC0, respectively. Normally, these are required to be consecutive insns,
427 but we permit putting a cc0-setting insn in the delay slot of a branch
428 as long as only one copy of the insn exists. In that case, these notes
429 point from one to the other to allow code generation to determine what
430 any require information and to properly update CC_STATUS.
431 REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
432 say that the CODE_LABEL contained in the REG_LABEL note is used
434 REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
435 dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
436 (write after write) dependencies. Data dependencies, which are the only
437 type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
438 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
439 -fbranch-probabilities is given. It has an integer value. For jumps,
440 it is the probability that this is a taken branch. For calls, it is the
441 probability that this call won't return.
442 REG_EXEC_COUNT is attached to the first insn of each basic block, and
443 the first insn after each CALL_INSN. It indicates how many times this
445 REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
446 allocations for targets where SETJMP_VIA_SAVE_AREA is true.
447 REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
448 flags computed by get_jump_flags() after dbr scheduling is complete.
449 REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
450 but are too complex for DWARF to interpret what they imply. The attached
451 rtx is used instead of intuition. */
452 /* REG_EH_REGION is used to indicate what exception region an INSN
453 belongs in. This can be used to indicate what region a call may throw
454 to. a REGION of 0 indicates that a call cannot throw at all.
455 a REGION of -1 indicates that it cannot throw, nor will it execute
457 REG_EH_RETHROW is used to indicate that a call is actually a
458 call to rethrow, and specifies the rethrow symbol for the region
459 the rethrow is targetting. This provides a way to generate the
460 non standard flow edges required for a rethrow. */
463 #define REG_NOTES(INSN) XEXP(INSN, 6)
465 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
467 /* Don't forget to change reg_note_name in rtl.c. */
468 enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4,
469 REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7,
470 REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10,
471 REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13,
472 REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15, REG_BR_PROB = 16,
473 REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19,
474 REG_BR_PRED = 20, REG_EH_CONTEXT = 21,
475 REG_FRAME_RELATED_EXPR = 22, REG_EH_REGION = 23,
476 REG_EH_RETHROW = 24 };
477 /* The base value for branch probability notes. */
478 #define REG_BR_PROB_BASE 10000
480 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
481 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
482 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
484 /* Names for REG_NOTE's in EXPR_LIST insn's. */
486 extern const char * const reg_note_name[];
487 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
489 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
490 USE and CLOBBER expressions.
491 USE expressions list the registers filled with arguments that
492 are passed to the function.
493 CLOBBER expressions document the registers explicitly clobbered
495 Pseudo registers can not be mentioned in this list. */
496 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
498 /* The label-number of a code-label. The assembler label
499 is made from `L' and the label-number printed in decimal.
500 Label numbers are unique in a compilation. */
501 #define CODE_LABEL_NUMBER(INSN) XINT(INSN, 3)
503 #define LINE_NUMBER NOTE
505 /* In a NOTE that is a line number, this is a string for the file name that the
506 line is in. We use the same field to record block numbers temporarily in
507 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
508 between ints and pointers if we use a different macro for the block number.)
509 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
510 information as a rtx in the field. */
512 #define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
513 #define NOTE_BLOCK_NUMBER(INSN) XCINT(INSN, 3, NOTE)
514 #define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
515 #define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
516 #define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
517 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
519 /* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new
520 block node for a live range block. */
521 #define NOTE_BLOCK_LIVE_RANGE_BLOCK -1
523 /* In a NOTE that is a line number, this is the line number.
524 Other kinds of NOTEs are identified by negative numbers here. */
525 #define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
527 /* Codes that appear in the NOTE_LINE_NUMBER field
528 for kinds of notes that are not line numbers.
530 Notice that we do not try to use zero here for any of
531 the special note codes because sometimes the source line
532 actually can be zero! This happens (for example) when we
533 are generating code for the per-translation-unit constructor
534 and destructor routines for some C++ translation unit.
536 If you should change any of the following values, or if you
537 should add a new value here, don't forget to change the
538 note_insn_name array in rtl.c. */
540 /* This note is used to get rid of an insn
541 when it isn't safe to patch the insn out of the chain. */
542 #define NOTE_INSN_DELETED -1
543 #define NOTE_INSN_BLOCK_BEG -2
544 #define NOTE_INSN_BLOCK_END -3
545 #define NOTE_INSN_LOOP_BEG -4
546 #define NOTE_INSN_LOOP_END -5
547 /* This kind of note is generated at the end of the function body,
548 just before the return insn or return label.
549 In an optimizing compilation it is deleted by the first jump optimization,
550 after enabling that optimizer to determine whether control can fall
551 off the end of the function body without a return statement. */
552 #define NOTE_INSN_FUNCTION_END -6
553 /* This kind of note is generated just after each call to `setjmp', et al. */
554 #define NOTE_INSN_SETJMP -7
555 /* Generated at the place in a loop that `continue' jumps to. */
556 #define NOTE_INSN_LOOP_CONT -8
557 /* Generated at the start of a duplicated exit test. */
558 #define NOTE_INSN_LOOP_VTOP -9
559 /* This marks the point immediately after the last prologue insn. */
560 #define NOTE_INSN_PROLOGUE_END -10
561 /* This marks the point immediately prior to the first epilogue insn. */
562 #define NOTE_INSN_EPILOGUE_BEG -11
563 /* Generated in place of user-declared labels when they are deleted. */
564 #define NOTE_INSN_DELETED_LABEL -12
565 /* This note indicates the start of the real body of the function,
566 i.e. the point just after all of the parms have been moved into
568 #define NOTE_INSN_FUNCTION_BEG -13
569 /* These note where exception handling regions begin and end. */
570 #define NOTE_INSN_EH_REGION_BEG -14
571 #define NOTE_INSN_EH_REGION_END -15
572 /* Generated whenever a duplicate line number note is output. For example,
573 one is output after the end of an inline function, in order to prevent
574 the line containing the inline call from being counted twice in gcov. */
575 #define NOTE_REPEATED_LINE_NUMBER -16
577 /* Start/end of a live range region, where pseudos allocated on the stack can
578 be allocated to temporary registers. */
579 #define NOTE_INSN_RANGE_START -17
580 #define NOTE_INSN_RANGE_END -18
581 /* Record which registers are currently live. */
582 #define NOTE_INSN_LIVE -19
583 /* Record the struct for the following basic block. */
584 #define NOTE_INSN_BASIC_BLOCK -20
586 /* Names for NOTE insn's other than line numbers. */
588 extern const char * const note_insn_name[];
589 #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
591 /* The name of a label, in case it corresponds to an explicit label
592 in the input source code. */
593 #define LABEL_NAME(RTX) XCSTR(RTX, 4, CODE_LABEL)
595 /* In jump.c, each label contains a count of the number
596 of LABEL_REFs that point at it, so unused labels can be deleted. */
597 #define LABEL_NUSES(RTX) XCINT(RTX, 5, CODE_LABEL)
599 /* The original regno this ADDRESSOF was built for. */
600 #define ADDRESSOF_REGNO(RTX) XCINT(RTX, 1, ADDRESSOF)
602 /* The variable in the register we took the address of. */
603 #define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
605 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
606 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
607 be decremented and possibly the label can be deleted. */
608 #define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
610 /* Once basic blocks are found in flow.c,
611 each CODE_LABEL starts a chain that goes through
612 all the LABEL_REFs that jump to that label.
613 The chain eventually winds up at the CODE_LABEL; it is circular. */
614 #define LABEL_REFS(LABEL) XCEXP(LABEL, 6, CODE_LABEL)
616 /* This is the field in the LABEL_REF through which the circular chain
617 of references to a particular label is linked.
618 This chain is set up in flow.c. */
620 #define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
622 /* Once basic blocks are found in flow.c,
623 Each LABEL_REF points to its containing instruction with this field. */
625 #define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
627 /* For a REG rtx, REGNO extracts the register number. */
629 #define REGNO(RTX) XCINT(RTX, 0, REG)
631 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
632 is the current function's return value. */
634 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
636 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
637 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
639 /* For a CONST_INT rtx, INTVAL extracts the integer. */
641 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
643 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
644 SUBREG_WORD extracts the word-number. */
646 #define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
647 #define SUBREG_WORD(RTX) XCINT(RTX, 1, SUBREG)
649 /* 1 if the REG contained in SUBREG_REG is already known to be
650 sign- or zero-extended from the mode of the SUBREG to the mode of
651 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
654 When used as a LHS, is means that this extension must be done
655 when assigning to SUBREG_REG. */
657 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
658 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
660 /* Access various components of an ASM_OPERANDS rtx. */
662 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
663 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
664 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
665 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
666 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
667 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
668 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
669 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
670 #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
671 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
672 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
674 /* For a MEM rtx, 1 if it's a volatile reference.
675 Also in an ASM_OPERANDS rtx. */
676 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
678 /* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero,
679 RTX may or may not refer to a field of an aggregate. */
680 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
682 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
683 not refer to a scalar.*/
684 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
686 /* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P
687 attributes from RHS to LHS. */
688 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
689 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
690 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
691 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS))
693 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
694 RTX. Otherwise, vice versa. Use this macro only when you are
695 *sure* that you know that the MEM is in a structure, or is a
696 scalar. VAL is evaluated only once. */
697 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
698 ((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \
699 : (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1))
701 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
702 set, and may alias anything. Otherwise, the MEM can only alias
703 MEMs in the same alias set. This value is set in a
704 language-dependent manner in the front-end, and should not be
705 altered in the back-end. These set numbers are tested for zero,
706 and compared for equality; they have no other significance. In
707 some front-ends, these numbers may correspond in some way to types,
708 or other language-level entities, but they need not, and the
709 back-end makes no such assumptions. */
710 #define MEM_ALIAS_SET(RTX) XCINT(RTX, 1, MEM)
712 /* For a LABEL_REF, 1 means that this reference is to a label outside the
713 loop containing the reference. */
714 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
716 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
717 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
718 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
720 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
721 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
723 /* For a REG, 1 means the register is used only in an exit test of a loop. */
724 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
726 /* During sched, for an insn, 1 means that the insn must be scheduled together
727 with the preceding insn. */
728 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
730 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
731 cost of the dependence link. The cost of executing an instruction
732 may vary based on how the results are used. LINK_COST_ZERO is 1 when
733 the cost through the link varies and is unchanged (i.e., the link has
734 zero additional cost). LINK_COST_FREE is 1 when the cost through the
735 link is zero (i.e., the link makes the cost free). In other cases,
736 the adjustment to the cost is recomputed each time it is needed. */
737 #define LINK_COST_ZERO(X) ((X)->jump)
738 #define LINK_COST_FREE(X) ((X)->call)
740 /* For a SET rtx, SET_DEST is the place that is set
741 and SET_SRC is the value it is set to. */
742 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
743 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
745 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
746 #define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
747 #define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
749 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
750 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
752 /* Flag in a SYMBOL_REF for machine-specific purposes. */
753 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
755 /* 1 in a SYMBOL_REF if it represents a symbol which might have to change
756 if its inlined or unrolled. */
757 #define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
759 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
760 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
762 /* Define a macro to look for REG_INC notes,
763 but save time on machines where they never exist. */
765 /* Don't continue this line--convex cc version 4.1 would lose. */
766 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
767 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
769 #define FIND_REG_INC_NOTE(insn, reg) 0
772 /* Indicate whether the machine has any sort of auto increment addressing.
773 If not, we can avoid checking for REG_INC notes. */
775 /* Don't continue this line--convex cc version 4.1 would lose. */
776 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
780 #ifndef HAVE_PRE_INCREMENT
781 #define HAVE_PRE_INCREMENT 0
784 #ifndef HAVE_PRE_DECREMENT
785 #define HAVE_PRE_DECREMENT 0
788 #ifndef HAVE_POST_INCREMENT
789 #define HAVE_POST_INCREMENT 0
792 #ifndef HAVE_POST_DECREMENT
793 #define HAVE_POST_DECREMENT 0
797 /* Some architectures do not have complete pre/post increment/decrement
798 instruction sets, or only move some modes efficiently. These macros
799 allow us to tune autoincrement generation. */
801 #ifndef USE_LOAD_POST_INCREMENT
802 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
805 #ifndef USE_LOAD_POST_DECREMENT
806 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
809 #ifndef USE_LOAD_PRE_INCREMENT
810 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
813 #ifndef USE_LOAD_PRE_DECREMENT
814 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
817 #ifndef USE_STORE_POST_INCREMENT
818 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
821 #ifndef USE_STORE_POST_DECREMENT
822 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
825 #ifndef USE_STORE_PRE_INCREMENT
826 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
829 #ifndef USE_STORE_PRE_DECREMENT
830 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
834 /* Accessors for RANGE_INFO. */
835 /* For RANGE_{START,END} notes return the RANGE_START note. */
836 #define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
838 /* For RANGE_{START,END} notes return the RANGE_START note. */
839 #define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
841 /* For RANGE_{START,END} notes, return the vector containing the registers used
843 #define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
844 #define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
845 #define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
847 /* For RANGE_{START,END} notes, the number of calls within the range. */
848 #define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
850 /* For RANGE_{START,END} notes, the number of insns within the range. */
851 #define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
853 /* For RANGE_{START,END} notes, a unique # to identify this range. */
854 #define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
856 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
857 #define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
859 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
860 #define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
862 /* For RANGE_{START,END} notes, the loop depth the range is in. */
863 #define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
865 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
867 #define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
869 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
871 #define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
873 /* For RANGE_START notes, the marker # of the start of the range. */
874 #define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
876 /* For RANGE_START notes, the marker # of the end of the range. */
877 #define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
879 /* Original pseudo register # for a live range note. */
880 #define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
882 /* Pseudo register # original register is copied into or -1. */
883 #define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
885 /* How many times a register in a live range note was referenced. */
886 #define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
888 /* How many times a register in a live range note was set. */
889 #define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
891 /* How many times a register in a live range note died. */
892 #define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
894 /* Whether the original value is needed to be copied into the range register at
895 the start of the range. */
896 #define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
898 /* # of insns the register copy is live over. */
899 #define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
901 /* # of calls the register copy is live over. */
902 #define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
904 /* DECL_NODE pointer of the declaration if the register is a user defined
906 #define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
908 /* BLOCK_NODE pointer to the block the variable is declared in if the
909 register is a user defined variable. */
910 #define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
912 /* EXPR_LIST of the distinct ranges a variable is in. */
913 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
915 /* Block a variable is declared in. */
916 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
918 /* # of distinct ranges a variable is in. */
919 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
921 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
922 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
924 /* For a NOTE_INSN_LIVE note, the original basic block number. */
925 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
927 /* Nonzero if we need to distinguish between the return value of this function
928 and the return value of a function called by this function. This helps
930 This is 1 until after the rtl generation pass. */
931 extern int rtx_equal_function_value_matters;
933 /* Generally useful functions. */
935 /* The following functions accept a wide integer argument. Rather than
936 having to cast on every function call, we use a macro instead, that is
937 defined here and in tree.h. */
940 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
941 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
943 extern int exact_log2_wide PROTO((unsigned HOST_WIDE_INT));
944 extern int floor_log2_wide PROTO((unsigned HOST_WIDE_INT));
947 extern int ceil_log2 PROTO((unsigned HOST_WIDE_INT));
949 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
951 #define plus_constant_for_output(X,C) \
952 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
955 extern HOST_WIDE_INT trunc_int_for_mode PROTO((HOST_WIDE_INT,
957 extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT));
958 extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT));
959 extern void optimize_save_area_alloca PROTO((rtx));
961 extern rtx gen_rtx PVPROTO((enum rtx_code,
962 enum machine_mode, ...));
963 extern rtvec gen_rtvec PVPROTO((int, ...));
966 extern rtx read_rtx PROTO((FILE *));
969 extern char *oballoc PROTO((int));
970 extern char *permalloc PROTO((int));
971 extern rtx rtx_alloc PROTO((RTX_CODE));
972 extern rtvec rtvec_alloc PROTO((int));
973 extern rtx copy_rtx PROTO((rtx));
974 extern rtx copy_rtx_if_shared PROTO((rtx));
975 extern rtx copy_most_rtx PROTO((rtx, rtx));
976 extern rtx shallow_copy_rtx PROTO((rtx));
977 extern rtvec gen_rtvec_v PROTO((int, rtx *));
978 extern rtx gen_reg_rtx PROTO((enum machine_mode));
979 extern rtx gen_label_rtx PROTO((void));
980 extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx));
981 extern rtx gen_lowpart PROTO((enum machine_mode, rtx));
982 extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx));
983 extern rtx gen_highpart PROTO((enum machine_mode, rtx));
984 extern rtx gen_realpart PROTO((enum machine_mode, rtx));
985 extern rtx gen_imagpart PROTO((enum machine_mode, rtx));
986 extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode));
987 extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode));
988 extern int subreg_lowpart_p PROTO((rtx));
989 extern rtx make_safe_from PROTO((rtx, rtx));
990 extern rtx convert_memory_address PROTO((enum machine_mode, rtx));
991 extern rtx memory_address PROTO((enum machine_mode, rtx));
992 extern rtx get_insns PROTO((void));
993 extern rtx get_last_insn PROTO((void));
994 extern rtx get_last_insn_anywhere PROTO((void));
995 extern void start_sequence PROTO((void));
996 extern void push_to_sequence PROTO((rtx));
997 extern void end_sequence PROTO((void));
998 extern rtx gen_sequence PROTO((void));
999 extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1000 extern rtx force_const_mem PROTO((enum machine_mode, rtx));
1001 extern rtx force_reg PROTO((enum machine_mode, rtx));
1002 extern rtx get_pool_constant PROTO((rtx));
1003 extern enum machine_mode get_pool_mode PROTO((rtx));
1004 extern int get_pool_offset PROTO((rtx));
1005 extern rtx simplify_subtraction PROTO((rtx));
1006 extern rtx assign_stack_local PROTO((enum machine_mode,
1007 HOST_WIDE_INT, int));
1008 extern rtx assign_stack_temp PROTO((enum machine_mode,
1009 HOST_WIDE_INT, int));
1010 extern rtx assign_temp PROTO((union tree_node *,
1012 extern rtx protect_from_queue PROTO((rtx, int));
1013 extern void emit_queue PROTO((void));
1014 extern rtx emit_move_insn PROTO((rtx, rtx));
1015 extern rtx emit_insn_before PROTO((rtx, rtx));
1016 extern rtx emit_jump_insn_before PROTO((rtx, rtx));
1017 extern rtx emit_call_insn_before PROTO((rtx, rtx));
1018 extern rtx emit_barrier_before PROTO((rtx));
1019 extern rtx emit_label_before PROTO((rtx, rtx));
1020 extern rtx emit_note_before PROTO((int, rtx));
1021 extern rtx emit_insn_after PROTO((rtx, rtx));
1022 extern rtx emit_jump_insn_after PROTO((rtx, rtx));
1023 extern rtx emit_barrier_after PROTO((rtx));
1024 extern rtx emit_label_after PROTO((rtx, rtx));
1025 extern rtx emit_note_after PROTO((int, rtx));
1026 extern rtx emit_line_note_after PROTO((char *, int, rtx));
1027 extern rtx emit_insn PROTO((rtx));
1028 extern rtx emit_insns PROTO((rtx));
1029 extern rtx emit_insns_before PROTO((rtx, rtx));
1030 extern rtx emit_insns_after PROTO((rtx, rtx));
1031 extern rtx emit_jump_insn PROTO((rtx));
1032 extern rtx emit_call_insn PROTO((rtx));
1033 extern rtx emit_label PROTO((rtx));
1034 extern rtx emit_barrier PROTO((void));
1035 extern rtx emit_line_note PROTO((char *, int));
1036 extern rtx emit_note PROTO((char *, int));
1037 extern rtx emit_line_note_force PROTO((char *, int));
1038 extern rtx make_insn_raw PROTO((rtx));
1039 extern rtx previous_insn PROTO((rtx));
1040 extern rtx next_insn PROTO((rtx));
1041 extern rtx prev_nonnote_insn PROTO((rtx));
1042 extern rtx next_nonnote_insn PROTO((rtx));
1043 extern rtx prev_real_insn PROTO((rtx));
1044 extern rtx next_real_insn PROTO((rtx));
1045 extern rtx prev_active_insn PROTO((rtx));
1046 extern rtx next_active_insn PROTO((rtx));
1047 extern rtx prev_label PROTO((rtx));
1048 extern rtx next_label PROTO((rtx));
1049 extern rtx next_cc0_user PROTO((rtx));
1050 extern rtx prev_cc0_setter PROTO((rtx));
1051 extern rtx next_nondeleted_insn PROTO((rtx));
1052 extern enum rtx_code reverse_condition PROTO((enum rtx_code));
1053 extern enum rtx_code swap_condition PROTO((enum rtx_code));
1054 extern enum rtx_code unsigned_condition PROTO((enum rtx_code));
1055 extern enum rtx_code signed_condition PROTO((enum rtx_code));
1056 extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode));
1057 extern rtx squeeze_notes PROTO((rtx, rtx));
1058 extern rtx delete_insn PROTO((rtx));
1059 extern void delete_jump PROTO((rtx));
1060 extern rtx get_label_before PROTO((rtx));
1061 extern rtx get_label_after PROTO((rtx));
1062 extern rtx follow_jumps PROTO((rtx));
1063 extern rtx adj_offsettable_operand PROTO((rtx, int));
1064 extern rtx try_split PROTO((rtx, rtx, int));
1065 extern rtx split_insns PROTO((rtx, rtx));
1066 extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode));
1067 extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
1068 extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx));
1069 extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
1070 extern rtx gen_move_insn PROTO((rtx, rtx));
1071 extern rtx gen_jump PROTO((rtx));
1072 extern rtx gen_beq PROTO((rtx));
1073 extern rtx gen_bge PROTO((rtx));
1074 extern rtx gen_ble PROTO((rtx));
1075 extern rtx gen_mem_addressof PROTO((rtx, union tree_node *));
1076 extern rtx eliminate_constant_term PROTO((rtx, rtx *));
1077 extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int));
1078 extern enum machine_mode choose_hard_reg_mode PROTO((int, int));
1079 extern void set_unique_reg_note PROTO((rtx, enum reg_note, rtx));
1081 /* Functions in rtlanal.c */
1083 extern int rtx_unstable_p PROTO((rtx));
1084 extern int rtx_varies_p PROTO((rtx));
1085 extern int rtx_addr_varies_p PROTO((rtx));
1086 extern HOST_WIDE_INT get_integer_term PROTO((rtx));
1087 extern rtx get_related_value PROTO((rtx));
1088 extern int reg_mentioned_p PROTO((rtx, rtx));
1089 extern int reg_referenced_p PROTO((rtx, rtx));
1090 extern int reg_used_between_p PROTO((rtx, rtx, rtx));
1091 extern int reg_referenced_between_p PROTO((rtx, rtx, rtx));
1092 extern int reg_set_between_p PROTO((rtx, rtx, rtx));
1093 extern int regs_set_between_p PROTO((rtx, rtx, rtx));
1094 extern int modified_between_p PROTO((rtx, rtx, rtx));
1095 extern int no_labels_between_p PROTO((rtx, rtx));
1096 extern int no_jumps_between_p PROTO((rtx, rtx));
1097 extern int modified_in_p PROTO((rtx, rtx));
1098 extern int reg_set_p PROTO((rtx, rtx));
1099 extern rtx single_set PROTO((rtx));
1100 extern int multiple_sets PROTO((rtx));
1101 extern rtx find_last_value PROTO((rtx, rtx *, rtx, int));
1102 extern int refers_to_regno_p PROTO((int, int, rtx, rtx *));
1103 extern int reg_overlap_mentioned_p PROTO((rtx, rtx));
1104 extern void note_stores PROTO((rtx, void (*)(rtx, rtx)));
1105 extern rtx reg_set_last PROTO((rtx, rtx));
1106 extern int rtx_equal_p PROTO((rtx, rtx));
1107 extern int dead_or_set_p PROTO((rtx, rtx));
1108 extern int dead_or_set_regno_p PROTO((rtx, int));
1109 extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx));
1110 extern rtx find_regno_note PROTO((rtx, enum reg_note, int));
1111 extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx));
1112 extern int find_regno_fusage PROTO((rtx, enum rtx_code, int));
1113 extern void remove_note PROTO((rtx, rtx));
1114 extern int side_effects_p PROTO((rtx));
1115 extern int volatile_refs_p PROTO((rtx));
1116 extern int volatile_insn_p PROTO((rtx));
1117 extern int may_trap_p PROTO((rtx));
1118 extern int inequality_comparisons_p PROTO ((rtx));
1119 extern rtx replace_rtx PROTO((rtx, rtx, rtx));
1120 extern rtx replace_regs PROTO((rtx, rtx *, int, int));
1121 extern int computed_jump_p PROTO((rtx));
1122 typedef int (*rtx_function) PROTO((rtx *, void *));
1123 extern int for_each_rtx PROTO((rtx *, rtx_function, void *));
1124 extern rtx regno_use_in PROTO((int, rtx));
1125 extern int auto_inc_p PROTO((rtx));
1126 extern void remove_node_from_expr_list PROTO((rtx, rtx *));
1130 extern rtx find_use_as_address PROTO((rtx, rtx, HOST_WIDE_INT));
1131 void init_EXPR_INSN_LIST_cache PROTO((void));
1132 void free_EXPR_LIST_list PROTO((rtx *));
1133 void free_INSN_LIST_list PROTO((rtx *));
1134 void free_EXPR_LIST_node PROTO((rtx));
1135 void free_INSN_LIST_node PROTO((rtx));
1136 rtx alloc_INSN_LIST PROTO((rtx, rtx));
1137 rtx alloc_EXPR_LIST PROTO((int, rtx, rtx));
1141 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1142 Always at least 3, since the combiner could put that many togetherm
1143 and we want this to remain correct for all the remaining passes. */
1145 extern int max_parallel;
1147 /* Free up register info memory. */
1148 extern void free_reg_info PROTO((void));
1151 extern int asm_noperands PROTO((rtx));
1152 extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **,
1154 enum machine_mode *));
1156 extern enum reg_class reg_preferred_class PROTO((int));
1157 extern enum reg_class reg_alternate_class PROTO((int));
1159 extern rtx get_first_nonparm_insn PROTO((void));
1161 extern void split_block_insns PROTO((int, int));
1162 extern void update_flow_info PROTO((rtx, rtx, rtx, rtx));
1164 /* Standard pieces of rtx, to be substituted directly into things. */
1165 #define pc_rtx (&global_rtl.pc_val)
1166 #define cc0_rtx (&global_rtl.cc0_val)
1168 #define MAX_SAVED_CONST_INT 64
1169 extern struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1171 #define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT])
1172 #define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1])
1173 #define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2])
1174 #define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1])
1175 extern rtx const_true_rtx;
1177 extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1179 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1180 same as VOIDmode. */
1182 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1184 /* Likewise, for the constants 1 and 2. */
1186 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1187 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1189 extern struct _global_rtl
1191 struct rtx_def pc_val, cc0_val;
1192 struct rtx_def stack_pointer_val, frame_pointer_val;
1193 struct rtx_def hard_frame_pointer_val;
1194 struct rtx_def arg_pointer_val;
1195 struct rtx_def virtual_incoming_args_val;
1196 struct rtx_def virtual_stack_vars_val;
1197 struct rtx_def virtual_stack_dynamic_val;
1198 struct rtx_def virtual_outgoing_args_val;
1199 struct rtx_def virtual_cfa_val;
1202 /* All references to certain hard regs, except those created
1203 by allocating pseudo regs into them (when that's possible),
1204 go through these unique rtx objects. */
1205 #define stack_pointer_rtx (&global_rtl.stack_pointer_val)
1206 #define frame_pointer_rtx (&global_rtl.frame_pointer_val)
1208 extern rtx pic_offset_table_rtx;
1209 extern rtx struct_value_rtx;
1210 extern rtx struct_value_incoming_rtx;
1211 extern rtx static_chain_rtx;
1212 extern rtx static_chain_incoming_rtx;
1213 extern rtx return_address_pointer_rtx;
1215 /* Include the RTL generation functions. */
1221 /* There are some RTL codes that require special attention; the
1222 generation functions included above do the raw handling. If you
1223 add to this list, modify special_rtx in gengenrtl.c as well. You
1224 should also modify gen_rtx to use the special function. */
1226 extern rtx gen_rtx_CONST_DOUBLE PROTO((enum machine_mode, rtx,
1227 HOST_WIDE_INT, HOST_WIDE_INT));
1228 extern rtx gen_rtx_CONST_INT PROTO((enum machine_mode, HOST_WIDE_INT));
1229 extern rtx gen_rtx_REG PROTO((enum machine_mode, int));
1230 extern rtx gen_rtx_MEM PROTO((enum machine_mode, rtx));
1232 /* We need the cast here to ensure that we get the same result both with
1233 and without prototypes. */
1234 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1237 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1238 is used to represent the frame pointer. This is because the
1239 hard frame pointer and the automatic variables are separated by an amount
1240 that cannot be determined until after register allocation. We can assume
1241 that in this case ELIMINABLE_REGS will be defined, one action of which
1242 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1243 #ifndef HARD_FRAME_POINTER_REGNUM
1244 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1247 /* For register elimination to work properly these hard_frame_pointer_rtx,
1248 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1249 the same register. */
1250 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1251 #define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val)
1253 #define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1256 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1257 #define arg_pointer_rtx (&global_rtl.frame_pointer_val)
1259 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1260 #define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1262 #define arg_pointer_rtx (&global_rtl.arg_pointer_val)
1266 /* Virtual registers are used during RTL generation to refer to locations into
1267 the stack frame when the actual location isn't known until RTL generation
1268 is complete. The routine instantiate_virtual_regs replaces these with
1269 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1272 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1274 /* This points to the first word of the incoming arguments passed on the stack,
1275 either by the caller or by the callee when pretending it was passed by the
1278 #define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val)
1280 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1282 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1283 variable on the stack. Otherwise, it points to the first variable on
1286 #define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val)
1288 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1290 /* This points to the location of dynamically-allocated memory on the stack
1291 immediately after the stack pointer has been adjusted by the amount
1294 #define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val)
1296 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1298 /* This points to the location in the stack at which outgoing arguments should
1299 be written when the stack is pre-pushed (arguments pushed using push
1300 insns always use sp). */
1302 #define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val)
1304 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1306 /* This points to the Canonical Frame Address of the function. This
1307 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1308 but is calculated relative to the arg pointer for simplicity; the
1309 frame pointer nor stack pointer are necessarily fixed relative to
1310 the CFA until after reload. */
1312 #define virtual_cfa_rtx (&global_rtl.virtual_cfa_val)
1314 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1316 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1318 extern rtx find_next_ref PROTO((rtx, rtx));
1319 extern rtx *find_single_use PROTO((rtx, rtx, rtx *));
1321 extern rtx output_constant_def PROTO((union tree_node *));
1322 extern rtx immed_real_const PROTO((union tree_node *));
1323 extern union tree_node *make_tree PROTO((union tree_node *, rtx));
1325 /* Define a default value for STORE_FLAG_VALUE. */
1327 #ifndef STORE_FLAG_VALUE
1328 #define STORE_FLAG_VALUE 1
1331 /* Nonzero after the second flow pass has completed.
1332 Set to 1 or 0 by toplev.c */
1333 extern int flow2_completed;
1335 /* Nonzero after end of reload pass.
1336 Set to 1 or 0 by reload1.c. */
1338 extern int reload_completed;
1340 /* Set to 1 while reload_as_needed is operating.
1341 Required by some machines to handle any generated moves differently. */
1343 extern int reload_in_progress;
1345 /* If this is nonzero, we do not bother generating VOLATILE
1346 around volatile memory references, and we are willing to
1347 output indirect addresses. If cse is to follow, we reject
1348 indirect addresses so a useful potential cse is generated;
1349 if it is used only once, instruction combination will produce
1350 the same indirect address eventually. */
1351 extern int cse_not_expected;
1353 /* Set to nonzero before life analysis to indicate that it is unsafe to
1354 generate any new pseudo registers. */
1355 extern int no_new_pseudos;
1357 /* Translates rtx code to tree code, for those codes needed by
1358 REAL_ARITHMETIC. The function returns an int because the caller may not
1359 know what `enum tree_code' means. */
1361 extern int rtx_to_tree_code PROTO((enum rtx_code));
1364 extern void obfree PROTO ((char *));
1366 extern void gcc_obstack_init PROTO ((struct obstack *));
1367 extern void pop_obstacks PROTO ((void));
1368 extern void push_obstacks PROTO ((struct obstack *,
1371 extern int read_skip_spaces PROTO ((FILE *));
1375 struct cse_basic_block_data;
1376 extern int rtx_cost PROTO ((rtx, enum rtx_code));
1377 extern void delete_trivially_dead_insns PROTO ((rtx, int));
1379 extern int cse_main PROTO ((rtx, int, int, FILE *));
1381 extern void cse_end_of_basic_block PROTO ((rtx,
1382 struct cse_basic_block_data *,
1386 extern int comparison_dominates_p PROTO ((enum rtx_code, enum rtx_code));
1387 extern int condjump_p PROTO ((rtx));
1388 extern rtx condjump_label PROTO ((rtx));
1389 extern int simplejump_p PROTO ((rtx));
1390 extern int returnjump_p PROTO ((rtx));
1391 extern int onlyjump_p PROTO ((rtx));
1392 extern int sets_cc0_p PROTO ((rtx));
1393 extern int invert_jump PROTO ((rtx, rtx));
1394 extern int rtx_renumbered_equal_p PROTO ((rtx, rtx));
1395 extern int true_regnum PROTO ((rtx));
1396 extern int redirect_jump PROTO ((rtx, rtx));
1397 extern void jump_optimize PROTO ((rtx, int, int, int));
1398 extern void rebuild_jump_labels PROTO ((rtx));
1399 extern void thread_jumps PROTO ((rtx, int, int));
1400 extern int redirect_exp PROTO ((rtx *, rtx, rtx, rtx));
1401 extern int rtx_equal_for_thread_p PROTO ((rtx, rtx, rtx));
1402 extern int invert_exp PROTO ((rtx, rtx));
1403 extern int can_reverse_comparison_p PROTO ((rtx, rtx));
1404 extern void delete_for_peephole PROTO ((rtx, rtx));
1405 extern int condjump_in_parallel_p PROTO ((rtx));
1406 extern void never_reached_warning PROTO ((rtx));
1408 /* Flags for jump_optimize() */
1409 #define JUMP_CROSS_JUMP 1
1410 #define JUMP_NOOP_MOVES 1
1411 #define JUMP_AFTER_REGSCAN 1
1413 /* In emit-rtl.c. */
1414 extern int max_reg_num PROTO ((void));
1415 extern int max_label_num PROTO ((void));
1416 extern int get_first_label_num PROTO ((void));
1417 extern void delete_insns_since PROTO ((rtx));
1418 extern void mark_reg_pointer PROTO ((rtx, int));
1419 extern void mark_user_reg PROTO ((rtx));
1420 extern void reset_used_flags PROTO ((rtx));
1421 extern void reorder_insns PROTO ((rtx, rtx, rtx));
1422 extern int get_max_uid PROTO ((void));
1423 extern int in_sequence_p PROTO ((void));
1424 extern void force_next_line_note PROTO ((void));
1425 extern void clear_emit_caches PROTO ((void));
1426 extern void init_emit PROTO ((void));
1427 extern void init_emit_once PROTO ((int));
1428 extern void push_topmost_sequence PROTO ((void));
1429 extern void pop_topmost_sequence PROTO ((void));
1430 extern int subreg_realpart_p PROTO ((rtx));
1431 extern void reverse_comparison PROTO ((rtx));
1432 extern void set_new_first_and_last_insn PROTO ((rtx, rtx));
1433 extern void set_new_first_and_last_label_num PROTO ((int, int));
1434 extern void set_new_last_label_num PROTO ((int));
1435 extern void unshare_all_rtl PROTO ((rtx));
1436 extern void set_last_insn PROTO ((rtx));
1437 extern void link_cc0_insns PROTO ((rtx));
1438 extern void add_insn PROTO ((rtx));
1439 extern void add_insn_before PROTO ((rtx, rtx));
1440 extern void add_insn_after PROTO ((rtx, rtx));
1441 extern void remove_insn PROTO ((rtx));
1442 extern void reorder_insns_with_line_notes PROTO ((rtx, rtx, rtx));
1443 extern void emit_insn_after_with_line_notes PROTO ((rtx, rtx, rtx));
1444 extern enum rtx_code classify_insn PROTO ((rtx));
1445 extern rtx emit PROTO ((rtx));
1446 /* Query and clear/ restore no_line_numbers. This is used by the
1447 switch / case handling in stmt.c to give proper line numbers in
1448 warnings about unreachable code. */
1449 int force_line_numbers PROTO((void));
1450 void restore_line_number_status PROTO((int old_value));
1452 /* In insn-emit.c */
1453 extern void add_clobbers PROTO ((rtx, int));
1456 extern void combine_instructions PROTO ((rtx, int));
1457 extern int extended_count PROTO ((rtx, enum machine_mode, int));
1458 extern rtx remove_death PROTO ((int, rtx));
1460 extern void dump_combine_stats PROTO ((FILE *));
1461 extern void dump_combine_total_stats PROTO ((FILE *));
1466 extern void schedule_insns PROTO ((FILE *));
1468 extern void fix_sched_param PROTO ((const char *, const char *));
1470 /* In print-rtl.c */
1471 extern void debug_rtx PROTO ((rtx));
1472 extern void debug_rtx_list PROTO ((rtx, int));
1473 extern rtx debug_rtx_find PROTO ((rtx, int));
1475 extern void print_rtl PROTO ((FILE *, rtx));
1476 extern int print_rtl_single PROTO ((FILE *, rtx));
1477 extern void print_inline_rtx PROTO ((FILE *, rtx, int));
1481 extern void init_loop PROTO ((void));
1482 extern rtx libcall_other_reg PROTO ((rtx, rtx));
1484 extern void loop_optimize PROTO ((rtx, FILE *, int, int));
1486 extern void record_excess_regs PROTO ((rtx, rtx, rtx *));
1489 extern void reposition_prologue_and_epilogue_notes PROTO ((rtx));
1490 extern void thread_prologue_and_epilogue_insns PROTO ((rtx));
1491 extern int prologue_epilogue_contains PROTO ((rtx));
1492 extern void use_variable PROTO ((rtx));
1493 extern HOST_WIDE_INT get_frame_size PROTO ((void));
1494 extern void preserve_rtl_expr_result PROTO ((rtx));
1495 extern void mark_temp_addr_taken PROTO ((rtx));
1496 extern void update_temp_slot_address PROTO ((rtx, rtx));
1497 extern void use_variable_after PROTO ((rtx, rtx));
1498 extern void purge_addressof PROTO ((rtx));
1501 extern int operands_match_p PROTO ((rtx, rtx));
1502 extern int safe_from_earlyclobber PROTO ((rtx, rtx));
1505 extern void set_file_and_line_for_stmt PROTO ((char *, int));
1506 extern void expand_null_return PROTO((void));
1507 extern void emit_jump PROTO ((rtx));
1508 extern int preserve_subexpressions_p PROTO ((void));
1511 extern void init_expr_once PROTO ((void));
1512 extern void move_by_pieces PROTO ((rtx, rtx, int, int));
1517 extern void stupid_life_analysis PROTO ((rtx, int, FILE *));
1521 extern void allocate_bb_life_data PROTO ((void));
1522 extern void allocate_reg_life_data PROTO ((void));
1523 extern void recompute_reg_usage PROTO ((rtx, int));
1525 extern void dump_flow_info PROTO ((FILE *));
1527 extern void free_bb_mem PROTO ((void));
1528 extern void replace_insns PROTO ((rtx, rtx, rtx, rtx));
1531 extern void init_expmed PROTO ((void));
1532 extern void expand_inc PROTO ((rtx, rtx));
1533 extern void expand_dec PROTO ((rtx, rtx));
1534 extern rtx expand_mult_highpart PROTO ((enum machine_mode, rtx,
1535 unsigned HOST_WIDE_INT, rtx,
1540 extern int gcse_main PROTO ((rtx, FILE *));
1544 extern void mark_elimination PROTO ((int, int));
1546 extern int global_alloc PROTO ((FILE *));
1547 extern void dump_global_regs PROTO ((FILE *));
1550 extern void retry_global_alloc PROTO ((int, HARD_REG_SET));
1554 extern int reg_classes_intersect_p PROTO ((enum reg_class, enum reg_class));
1555 extern int reg_class_subset_p PROTO ((enum reg_class, enum reg_class));
1556 extern void globalize_reg PROTO ((int));
1557 extern void init_regs PROTO ((void));
1558 extern void init_reg_sets PROTO ((void));
1559 extern void regset_release_memory PROTO ((void));
1560 extern void regclass_init PROTO ((void));
1561 extern void regclass PROTO ((rtx, int));
1562 extern void reg_scan PROTO ((rtx, int, int));
1563 extern void reg_scan_update PROTO ((rtx, rtx, int));
1564 extern void fix_register PROTO ((char *, int, int));
1568 extern void regmove_optimize PROTO ((rtx, int, FILE *));
1573 extern void dbr_schedule PROTO ((rtx, FILE *));
1577 extern void init_optabs PROTO ((void));
1579 /* In local-alloc.c */
1581 extern void dump_local_alloc PROTO ((FILE *));
1583 extern int local_alloc PROTO ((void));
1584 extern int function_invariant_p PROTO ((rtx));
1587 extern void reload_cse_regs PROTO ((rtx));
1588 extern void init_reload PROTO ((void));
1589 extern void mark_home_live PROTO ((int));
1591 extern int reload PROTO ((rtx, int, FILE *));
1594 /* In caller-save.c */
1595 extern void init_caller_save PROTO ((void));
1598 extern void init_branch_prob PROTO ((const char *));
1600 extern void branch_prob PROTO ((rtx, FILE *));
1601 extern void end_branch_prob PROTO ((FILE *));
1603 extern void output_func_start_profiler PROTO ((void));
1605 /* In reg-stack.c */
1607 extern void reg_to_stack PROTO ((rtx, FILE *));
1610 /* In fold-const.c */
1611 extern int add_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1612 HOST_WIDE_INT, HOST_WIDE_INT,
1613 HOST_WIDE_INT *, HOST_WIDE_INT *));
1614 extern int neg_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1615 HOST_WIDE_INT *, HOST_WIDE_INT *));
1616 extern int mul_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1617 HOST_WIDE_INT, HOST_WIDE_INT,
1618 HOST_WIDE_INT *, HOST_WIDE_INT *));
1619 extern void lshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1620 HOST_WIDE_INT, int, HOST_WIDE_INT *,
1621 HOST_WIDE_INT *, int));
1622 extern void rshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1624 HOST_WIDE_INT *, HOST_WIDE_INT *, int));
1625 extern void lrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1626 HOST_WIDE_INT, int, HOST_WIDE_INT *,
1628 extern void rrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1629 HOST_WIDE_INT, int, HOST_WIDE_INT *,
1633 /* Emit library call. */
1634 extern void emit_library_call PVPROTO ((rtx, int, enum machine_mode,
1636 extern rtx emit_library_call_value PVPROTO((rtx, rtx, int,
1641 extern int set_dominates_use PROTO ((int, int, int, rtx, rtx));
1644 extern void bss_section PROTO ((void));
1645 extern int in_data_section PROTO ((void));
1646 extern int supports_one_only PROTO ((void));
1649 extern void init_rtl PROTO ((void));
1650 extern void rtx_free PROTO ((rtx));
1652 /* Redefine abort to report an internal error w/o coredump, and
1653 reporting the location of the error in the source file. This logic
1654 is duplicated in rtl.h and tree.h because every file that needs the
1655 special abort includes one or both. toplev.h gets too few files,
1656 system.h gets too many. */
1658 extern void fancy_abort PROTO((const char *, int, const char *))
1660 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
1661 #define abort() fancy_abort (__FILE__, __LINE__, 0)
1663 #define abort() fancy_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
1667 extern int true_dependence PROTO ((rtx, enum machine_mode, rtx,
1669 extern int read_dependence PROTO ((rtx, rtx));
1670 extern int anti_dependence PROTO ((rtx, rtx));
1671 extern int output_dependence PROTO ((rtx, rtx));
1672 extern void mark_constant_function PROTO ((void));
1673 extern void init_alias_once PROTO ((void));
1674 extern void init_alias_analysis PROTO ((void));
1675 extern void end_alias_analysis PROTO ((void));
1677 extern void record_base_value PROTO ((int, rtx, int));
1678 extern void record_alias_subset PROTO ((int, int));
1679 extern rtx addr_side_effect_eval PROTO ((rtx, int, int));
1682 extern int stack_regs_mentioned PROTO((rtx insn));