1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 91-97, 1998 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 int rtx_length
[];
52 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
54 extern char *rtx_name
[];
55 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
57 extern char *rtx_format
[];
58 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
60 extern 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
;
96 /* RTL expression ("rtx"). */
98 typedef struct rtx_def
100 #ifdef ONLY_INT_FIELDS
101 #ifdef CODE_FIELD_BUG
102 unsigned int code
: 16;
107 /* The kind of expression this is. */
108 enum rtx_code code
: 16;
110 /* The kind of value the expression has. */
111 #ifdef ONLY_INT_FIELDS
114 enum machine_mode mode
: 8;
116 /* 1 in an INSN if it can alter flow of control
117 within this function. Not yet used! */
118 unsigned int jump
: 1;
119 /* 1 in an INSN if it can call another function. Not yet used! */
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 /* Nonzero if this rtx is related to the call frame, either changing how
167 we compute the frame address or saving and restoring registers in
168 the prologue and epilogue. */
169 unsigned frame_related
: 1;
170 /* The first element of the operands of this rtx.
171 The number of operands and their types are controlled
172 by the `code' field, according to rtl.def. */
176 #define NULL_RTX (rtx) 0
178 /* Define macros to access the `code' field of the rtx. */
180 #ifdef SHORT_ENUM_BUG
181 #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
182 #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
184 #define GET_CODE(RTX) ((RTX)->code)
185 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
188 #define GET_MODE(RTX) ((RTX)->mode)
189 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
191 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
192 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
193 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
195 /* RTL vector. These appear inside RTX's when there is a need
196 for a variable number of things. The principle use is inside
197 PARALLEL expressions. */
199 typedef struct rtvec_def
{
200 int num_elem
; /* number of elements */
204 #define NULL_RTVEC (rtvec) 0
206 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
207 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
209 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx)
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)
222 /* General accessor macros for accessing the fields of an rtx. */
224 #define XEXP(RTX, N) ((RTX)->fld[N].rtx)
225 #define XINT(RTX, N) ((RTX)->fld[N].rtint)
226 #define XWINT(RTX, N) ((RTX)->fld[N].rtwint)
227 #define XSTR(RTX, N) ((RTX)->fld[N].rtstr)
228 #define XVEC(RTX, N) ((RTX)->fld[N].rtvec)
229 #define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem)
230 #define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx)
231 #define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit)
232 #define XTREE(RTX, N) ((RTX)->fld[N].rttree)
235 /* ACCESS MACROS for particular fields of insns. */
237 /* Holds a unique number for each insn.
238 These are not necessarily sequentially increasing. */
239 #define INSN_UID(INSN) ((INSN)->fld[0].rtint)
241 /* Chain insns together in sequence. */
242 #define PREV_INSN(INSN) ((INSN)->fld[1].rtx)
243 #define NEXT_INSN(INSN) ((INSN)->fld[2].rtx)
245 /* The body of an insn. */
246 #define PATTERN(INSN) ((INSN)->fld[3].rtx)
248 /* Code number of instruction, from when it was recognized.
249 -1 means this instruction has not been recognized yet. */
250 #define INSN_CODE(INSN) ((INSN)->fld[4].rtint)
252 /* Set up in flow.c; empty before then.
253 Holds a chain of INSN_LIST rtx's whose first operands point at
254 previous insns with direct data-flow connections to this one.
255 That means that those insns set variables whose next use is in this insn.
256 They are always in the same basic block as this insn. */
257 #define LOG_LINKS(INSN) ((INSN)->fld[5].rtx)
259 /* 1 if insn has been deleted. */
260 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
262 /* 1 if insn is a call to a const function. */
263 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
265 /* 1 if insn is a branch that should not unconditionally execute its
266 delay slots, i.e., it is an annulled branch. */
267 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
269 /* 1 if insn is in a delay slot and is from the target of the branch. If
270 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
271 executed if the branch is taken. For annulled branches with this bit
272 clear, the insn should be executed only if the branch is not taken. */
273 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
275 /* Holds a list of notes on what this insn does to various REGs.
276 It is a chain of EXPR_LIST rtx's, where the second operand
277 is the chain pointer and the first operand is the REG being described.
278 The mode field of the EXPR_LIST contains not a real machine mode
279 but a value that says what this note says about the REG:
280 REG_DEAD means that the value in REG dies in this insn (i.e., it is
281 not needed past this insn). If REG is set in this insn, the REG_DEAD
282 note may, but need not, be omitted.
283 REG_INC means that the REG is autoincremented or autodecremented.
284 REG_EQUIV describes the insn as a whole; it says that the insn
285 sets a register to a constant value or to be equivalent to a memory
286 address. If the register is spilled to the stack then the constant
287 value should be substituted for it. The contents of the REG_EQUIV
288 is the constant value or memory address, which may be different
289 from the source of the SET although it has the same value. A
290 REG_EQUIV note may also appear on an insn which copies a register
291 parameter to a pseudo-register, if there is a memory address which
292 could be used to hold that pseudo-register throughout the function.
293 REG_EQUAL is like REG_EQUIV except that the destination
294 is only momentarily equal to the specified rtx. Therefore, it
295 cannot be used for substitution; but it can be used for cse.
296 REG_RETVAL means that this insn copies the return-value of
297 a library call out of the hard reg for return values. This note
298 is actually an INSN_LIST and it points to the first insn involved
299 in setting up arguments for the call. flow.c uses this to delete
300 the entire library call when its result is dead.
301 REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
302 of the library call and points at the one that has the REG_RETVAL.
303 REG_WAS_0 says that the register set in this insn held 0 before the insn.
304 The contents of the note is the insn that stored the 0.
305 If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
306 The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
307 REG_NONNEG means that the register is always nonnegative during
308 the containing loop. This is used in branches so that decrement and
309 branch instructions terminating on zero can be matched. There must be
310 an insn pattern in the md file named `decrement_and_branch_until_zero'
311 or else this will never be added to any instructions.
312 REG_NO_CONFLICT means there is no conflict *after this insn*
313 between the register in the note and the destination of this insn.
314 REG_UNUSED identifies a register set in this insn and never used.
315 REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
316 CC0, respectively. Normally, these are required to be consecutive insns,
317 but we permit putting a cc0-setting insn in the delay slot of a branch
318 as long as only one copy of the insn exists. In that case, these notes
319 point from one to the other to allow code generation to determine what
320 any require information and to properly update CC_STATUS.
321 REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
322 say that the CODE_LABEL contained in the REG_LABEL note is used
324 REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
325 dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
326 (write after write) dependencies. Data dependencies, which are the only
327 type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
328 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
329 -fbranch-probabilities is given. It has an integer value. For jumps,
330 it is the probability that this is a taken branch. For calls, it is the
331 probability that this call won't return.
332 REG_EXEC_COUNT is attached to the first insn of each basic block, and
333 the first insn after each CALL_INSN. It indicates how many times this
335 REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
336 allocations for targets where SETJMP_VIA_SAVE_AREA is true.
337 REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
338 flags computed by get_jump_flags() after dbr scheduling is complete.
339 REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
340 but are too complex for DWARF to interpret what they imply. The attached
341 rtx is used instead of intuition. */
342 /* REG_EH_REGION is used to indicate what exception region an INSN
343 belongs in. This can be used to indicate what region a call may throw
344 to. a REGION of 0 indicates that a call cannot throw at all.
345 REG_EH_RETHROW is used to indicate what that a call is actually a
346 call to rethrow, and specifies which region the rethrow is targetting.
347 This provides a way to generate the non standard flow edges required
351 #define REG_NOTES(INSN) ((INSN)->fld[6].rtx)
353 #define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags)
355 /* Don't forget to change reg_note_name in rtl.c. */
356 enum reg_note
{ REG_DEAD
= 1, REG_INC
= 2, REG_EQUIV
= 3, REG_WAS_0
= 4,
357 REG_EQUAL
= 5, REG_RETVAL
= 6, REG_LIBCALL
= 7,
358 REG_NONNEG
= 8, REG_NO_CONFLICT
= 9, REG_UNUSED
= 10,
359 REG_CC_SETTER
= 11, REG_CC_USER
= 12, REG_LABEL
= 13,
360 REG_DEP_ANTI
= 14, REG_DEP_OUTPUT
= 15, REG_BR_PROB
= 16,
361 REG_EXEC_COUNT
= 17, REG_NOALIAS
= 18, REG_SAVE_AREA
= 19,
362 REG_BR_PRED
= 20, REG_EH_CONTEXT
= 21,
363 REG_FRAME_RELATED_EXPR
= 22, REG_EH_REGION
= 23,
364 REG_EH_RETHROW
= 24 };
365 /* The base value for branch probability notes. */
366 #define REG_BR_PROB_BASE 10000
368 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
369 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
370 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
372 /* Names for REG_NOTE's in EXPR_LIST insn's. */
374 extern char *reg_note_name
[];
375 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
377 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
378 USE and CLOBBER expressions.
379 USE expressions list the registers filled with arguments that
380 are passed to the function.
381 CLOBBER expressions document the registers explicitly clobbered
383 Pseudo registers can not be mentioned in this list. */
384 #define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx)
386 /* The label-number of a code-label. The assembler label
387 is made from `L' and the label-number printed in decimal.
388 Label numbers are unique in a compilation. */
389 #define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint)
391 #define LINE_NUMBER NOTE
393 /* In a NOTE that is a line number, this is a string for the file name that the
394 line is in. We use the same field to record block numbers temporarily in
395 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
396 between ints and pointers if we use a different macro for the block number.)
397 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
398 information as a rtx in the field. */
400 #define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr)
401 #define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint)
402 #define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx)
403 #define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx)
405 /* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new
406 block node for a live range block. */
407 #define NOTE_BLOCK_LIVE_RANGE_BLOCK -1
409 /* In a NOTE that is a line number, this is the line number.
410 Other kinds of NOTEs are identified by negative numbers here. */
411 #define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint)
413 /* Codes that appear in the NOTE_LINE_NUMBER field
414 for kinds of notes that are not line numbers.
416 Notice that we do not try to use zero here for any of
417 the special note codes because sometimes the source line
418 actually can be zero! This happens (for example) when we
419 are generating code for the per-translation-unit constructor
420 and destructor routines for some C++ translation unit.
422 If you should change any of the following values, or if you
423 should add a new value here, don't forget to change the
424 note_insn_name array in rtl.c. */
426 /* This note is used to get rid of an insn
427 when it isn't safe to patch the insn out of the chain. */
428 #define NOTE_INSN_DELETED -1
429 #define NOTE_INSN_BLOCK_BEG -2
430 #define NOTE_INSN_BLOCK_END -3
431 #define NOTE_INSN_LOOP_BEG -4
432 #define NOTE_INSN_LOOP_END -5
433 /* This kind of note is generated at the end of the function body,
434 just before the return insn or return label.
435 In an optimizing compilation it is deleted by the first jump optimization,
436 after enabling that optimizer to determine whether control can fall
437 off the end of the function body without a return statement. */
438 #define NOTE_INSN_FUNCTION_END -6
439 /* This kind of note is generated just after each call to `setjmp', et al. */
440 #define NOTE_INSN_SETJMP -7
441 /* Generated at the place in a loop that `continue' jumps to. */
442 #define NOTE_INSN_LOOP_CONT -8
443 /* Generated at the start of a duplicated exit test. */
444 #define NOTE_INSN_LOOP_VTOP -9
445 /* This marks the point immediately after the last prologue insn. */
446 #define NOTE_INSN_PROLOGUE_END -10
447 /* This marks the point immediately prior to the first epilogue insn. */
448 #define NOTE_INSN_EPILOGUE_BEG -11
449 /* Generated in place of user-declared labels when they are deleted. */
450 #define NOTE_INSN_DELETED_LABEL -12
451 /* This note indicates the start of the real body of the function,
452 i.e. the point just after all of the parms have been moved into
454 #define NOTE_INSN_FUNCTION_BEG -13
455 /* These note where exception handling regions begin and end. */
456 #define NOTE_INSN_EH_REGION_BEG -14
457 #define NOTE_INSN_EH_REGION_END -15
458 /* Generated whenever a duplicate line number note is output. For example,
459 one is output after the end of an inline function, in order to prevent
460 the line containing the inline call from being counted twice in gcov. */
461 #define NOTE_REPEATED_LINE_NUMBER -16
463 /* Start/end of a live range region, where pseudos allocated on the stack can
464 be allocated to temporary registers. */
465 #define NOTE_INSN_RANGE_START -17
466 #define NOTE_INSN_RANGE_END -18
467 /* Record which registers are currently live. */
468 #define NOTE_INSN_LIVE -19
470 #if 0 /* These are not used, and I don't know what they were for. --rms. */
471 #define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr)
472 #define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint)
473 #define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx)
474 #define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint)
475 #define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint)
478 /* Names for NOTE insn's other than line numbers. */
480 extern char *note_insn_name
[];
481 #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
483 /* The name of a label, in case it corresponds to an explicit label
484 in the input source code. */
485 #define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr)
487 /* In jump.c, each label contains a count of the number
488 of LABEL_REFs that point at it, so unused labels can be deleted. */
489 #define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint)
491 /* The original regno this ADDRESSOF was built for. */
492 #define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint)
494 /* The variable in the register we took the address of. */
495 #define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2))
496 #define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T))
498 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
499 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
500 be decremented and possibly the label can be deleted. */
501 #define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx)
503 /* Once basic blocks are found in flow.c,
504 each CODE_LABEL starts a chain that goes through
505 all the LABEL_REFs that jump to that label.
506 The chain eventually winds up at the CODE_LABEL; it is circular. */
507 #define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx)
509 /* This is the field in the LABEL_REF through which the circular chain
510 of references to a particular label is linked.
511 This chain is set up in flow.c. */
513 #define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx)
515 /* Once basic blocks are found in flow.c,
516 Each LABEL_REF points to its containing instruction with this field. */
518 #define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx)
520 /* For a REG rtx, REGNO extracts the register number. */
522 #define REGNO(RTX) ((RTX)->fld[0].rtint)
524 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
525 is the current function's return value. */
527 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
529 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
530 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
532 /* For a CONST_INT rtx, INTVAL extracts the integer. */
534 #define INTVAL(RTX) ((RTX)->fld[0].rtwint)
536 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
537 SUBREG_WORD extracts the word-number. */
539 #define SUBREG_REG(RTX) ((RTX)->fld[0].rtx)
540 #define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint)
542 /* 1 if the REG contained in SUBREG_REG is already known to be
543 sign- or zero-extended from the mode of the SUBREG to the mode of
544 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
547 When used as a LHS, is means that this extension must be done
548 when assigning to SUBREG_REG. */
550 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
551 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
553 /* Access various components of an ASM_OPERANDS rtx. */
555 #define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0)
556 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1)
557 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2)
558 #define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3)
559 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4)
560 #define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N))
561 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3)
562 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0)
563 #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N)))
564 #define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5)
565 #define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6)
567 /* For a MEM rtx, 1 if it's a volatile reference.
568 Also in an ASM_OPERANDS rtx. */
569 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
571 /* For a MEM rtx, 1 if it refers to a field of an aggregate. */
572 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
574 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
575 set, and may alias anything. Otherwise, the MEM can only alias
576 MEMs in the same alias set. This value is set in a
577 language-dependent manner in the front-end, and should not be
578 altered in the back-end. These set numbers are tested for zero,
579 and compared for equality; they have no other significance. In
580 some front-ends, these numbers may correspond in some way to types,
581 or other language-level entities, but they need not, and the
582 back-end makes no such assumptions. */
583 #define MEM_ALIAS_SET(RTX) (XINT (RTX, 1))
585 /* For a LABEL_REF, 1 means that this reference is to a label outside the
586 loop containing the reference. */
587 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
589 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
590 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
591 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
593 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
594 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
596 /* For a REG, 1 means the register is used only in an exit test of a loop. */
597 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
599 /* During sched, for an insn, 1 means that the insn must be scheduled together
600 with the preceding insn. */
601 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
603 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
604 cost of the dependence link. The cost of executing an instruction
605 may vary based on how the results are used. LINK_COST_ZERO is 1 when
606 the cost through the link varies and is unchanged (i.e., the link has
607 zero additional cost). LINK_COST_FREE is 1 when the cost through the
608 link is zero (i.e., the link makes the cost free). In other cases,
609 the adjustment to the cost is recomputed each time it is needed. */
610 #define LINK_COST_ZERO(X) ((X)->jump)
611 #define LINK_COST_FREE(X) ((X)->call)
613 /* For a SET rtx, SET_DEST is the place that is set
614 and SET_SRC is the value it is set to. */
615 #define SET_DEST(RTX) ((RTX)->fld[0].rtx)
616 #define SET_SRC(RTX) ((RTX)->fld[1].rtx)
618 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
619 #define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx)
620 #define TRAP_CODE(RTX) (RTX)->fld[1].rtx
622 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
623 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
625 /* Flag in a SYMBOL_REF for machine-specific purposes. */
626 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
628 /* 1 in a SYMBOL_REF if it represents a symbol which might have to change
629 if its inlined or unrolled. */
630 #define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
632 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
633 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
635 /* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn
636 of the function that is not involved in copying parameters to
637 pseudo-registers. FIRST_PARM_INSN is the very first insn of
638 the function, including the parameter copying.
639 We keep this around in case we must splice
640 this function into the assembly code at the end of the file.
641 FIRST_LABELNO is the first label number used by the function (inclusive).
642 LAST_LABELNO is the last label used by the function (exclusive).
643 MAX_REGNUM is the largest pseudo-register used by that function.
644 FUNCTION_ARGS_SIZE is the size of the argument block in the stack.
645 POPS_ARGS is the number of bytes of input arguments popped by the function
646 STACK_SLOT_LIST is the list of stack slots.
647 FORCED_LABELS is the list of labels whose address was taken.
648 FUNCTION_FLAGS are where single-bit flags are saved.
649 OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list.
650 ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values
651 for the function arguments.
652 ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the
654 INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and
655 INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays.
657 We want this to lay down like an INSN. The PREV_INSN field
658 is always NULL. The NEXT_INSN field always points to the
659 first function insn of the function being squirreled away. */
661 #define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx)
662 #define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx)
663 #define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint)
664 #define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint)
665 #define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint)
666 #define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint)
667 #define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint)
668 #define POPS_ARGS(RTX) ((RTX)->fld[9].rtint)
669 #define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx)
670 #define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx)
671 #define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint)
672 #define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint)
673 #define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec)
674 #define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx)
675 #define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec)
676 #define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr)
677 #define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr)
678 #define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec)
680 /* In FUNCTION_FLAGS we save some variables computed when emitting the code
681 for the function and which must be `or'ed into the current flag values when
682 insns from that function are being inlined. */
684 /* These ought to be an enum, but non-ANSI compilers don't like that. */
685 #define FUNCTION_FLAGS_CALLS_ALLOCA 01
686 #define FUNCTION_FLAGS_CALLS_SETJMP 02
687 #define FUNCTION_FLAGS_RETURNS_STRUCT 04
688 #define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010
689 #define FUNCTION_FLAGS_NEEDS_CONTEXT 020
690 #define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040
691 #define FUNCTION_FLAGS_RETURNS_POINTER 0100
692 #define FUNCTION_FLAGS_USES_CONST_POOL 0200
693 #define FUNCTION_FLAGS_CALLS_LONGJMP 0400
694 #define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000
696 /* Define a macro to look for REG_INC notes,
697 but save time on machines where they never exist. */
699 /* Don't continue this line--convex cc version 4.1 would lose. */
700 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
701 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
703 #define FIND_REG_INC_NOTE(insn, reg) 0
706 /* Indicate whether the machine has any sort of auto increment addressing.
707 If not, we can avoid checking for REG_INC notes. */
709 /* Don't continue this line--convex cc version 4.1 would lose. */
710 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
714 #ifndef HAVE_PRE_INCREMENT
715 #define HAVE_PRE_INCREMENT 0
718 #ifndef HAVE_PRE_DECREMENT
719 #define HAVE_PRE_DECREMENT 0
722 #ifndef HAVE_POST_INCREMENT
723 #define HAVE_POST_INCREMENT 0
726 #ifndef HAVE_POST_DECREMENT
727 #define HAVE_POST_DECREMENT 0
730 /* Accessors for RANGE_INFO. */
731 /* For RANGE_{START,END} notes return the RANGE_START note. */
732 #define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0))
734 /* For RANGE_{START,END} notes return the RANGE_START note. */
735 #define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1))
737 /* For RANGE_{START,END} notes, return the vector containing the registers used
739 #define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2))
740 #define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N))
741 #define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2))
743 /* For RANGE_{START,END} notes, the number of calls within the range. */
744 #define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3))
746 /* For RANGE_{START,END} notes, the number of insns within the range. */
747 #define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4))
749 /* For RANGE_{START,END} notes, a unique # to identify this range. */
750 #define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5))
752 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
753 #define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6))
755 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
756 #define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7))
758 /* For RANGE_{START,END} notes, the loop depth the range is in. */
759 #define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8))
761 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
763 #define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9))
765 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
767 #define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10))
769 /* For RANGE_START notes, the marker # of the start of the range. */
770 #define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11))
772 /* For RANGE_START notes, the marker # of the end of the range. */
773 #define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12))
775 /* Original pseudo register # for a live range note. */
776 #define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0))
778 /* Pseudo register # original register is copied into or -1. */
779 #define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1))
781 /* How many times a register in a live range note was referenced. */
782 #define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2))
784 /* How many times a register in a live range note was set. */
785 #define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3))
787 /* How many times a register in a live range note died. */
788 #define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4))
790 /* Whether the original value is needed to be copied into the range register at
791 the start of the range. */
792 #define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5))
794 /* # of insns the register copy is live over. */
795 #define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6))
797 /* # of calls the register copy is live over. */
798 #define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7))
800 /* DECL_NODE pointer of the declaration if the register is a user defined
802 #define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8))
804 /* BLOCK_NODE pointer to the block the variable is declared in if the
805 register is a user defined variable. */
806 #define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9))
808 /* EXPR_LIST of the distinct ranges a variable is in. */
809 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
811 /* Block a variable is declared in. */
812 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
814 /* # of distinct ranges a variable is in. */
815 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
817 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
818 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
820 /* For a NOTE_INSN_LIVE note, the original basic block number. */
821 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
823 /* Generally useful functions. */
825 /* The following functions accept a wide integer argument. Rather than
826 having to cast on every function call, we use a macro instead, that is
827 defined here and in tree.h. */
830 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
831 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
833 extern int exact_log2_wide
PROTO((unsigned HOST_WIDE_INT
));
834 extern int floor_log2_wide
PROTO((unsigned HOST_WIDE_INT
));
837 extern int ceil_log2
PROTO((unsigned HOST_WIDE_INT
));
839 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
841 #define plus_constant_for_output(X,C) \
842 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
845 extern rtx plus_constant_wide
PROTO((rtx
, HOST_WIDE_INT
));
846 extern rtx plus_constant_for_output_wide
PROTO((rtx
, HOST_WIDE_INT
));
847 extern void optimize_save_area_alloca
PROTO((rtx
));
849 extern rtx gen_rtx
PVPROTO((enum rtx_code
,
850 enum machine_mode
, ...));
851 extern rtvec gen_rtvec
PVPROTO((int, ...));
854 extern rtx read_rtx
PROTO((FILE *));
857 extern char *oballoc
PROTO((int));
858 extern char *permalloc
PROTO((int));
859 extern rtx rtx_alloc
PROTO((RTX_CODE
));
860 extern rtvec rtvec_alloc
PROTO((int));
861 extern rtx copy_rtx
PROTO((rtx
));
862 extern rtx copy_rtx_if_shared
PROTO((rtx
));
863 extern rtx copy_most_rtx
PROTO((rtx
, rtx
));
864 extern rtvec gen_rtvec_v
PROTO((int, rtx
*));
865 extern rtvec gen_rtvec_vv
PROTO((int, rtunion
*));
866 extern rtx gen_reg_rtx
PROTO((enum machine_mode
));
867 extern rtx gen_label_rtx
PROTO((void));
868 extern rtx gen_inline_header_rtx
PROTO((rtx
, rtx
, int, int, int, int,
869 int, int, rtx
, rtx
, int, int,
871 rtvec
, char *, char *, rtvec
));
872 extern rtx gen_lowpart_common
PROTO((enum machine_mode
, rtx
));
873 extern rtx gen_lowpart
PROTO((enum machine_mode
, rtx
));
874 extern rtx gen_lowpart_if_possible
PROTO((enum machine_mode
, rtx
));
875 extern rtx gen_highpart
PROTO((enum machine_mode
, rtx
));
876 extern rtx gen_realpart
PROTO((enum machine_mode
, rtx
));
877 extern rtx gen_imagpart
PROTO((enum machine_mode
, rtx
));
878 extern rtx operand_subword
PROTO((rtx
, int, int, enum machine_mode
));
879 extern rtx operand_subword_force
PROTO((rtx
, int, enum machine_mode
));
880 extern int subreg_lowpart_p
PROTO((rtx
));
881 extern rtx make_safe_from
PROTO((rtx
, rtx
));
882 extern rtx convert_memory_address
PROTO((enum machine_mode
, rtx
));
883 extern rtx memory_address
PROTO((enum machine_mode
, rtx
));
884 extern rtx get_insns
PROTO((void));
885 extern rtx get_last_insn
PROTO((void));
886 extern rtx get_last_insn_anywhere
PROTO((void));
887 extern void start_sequence
PROTO((void));
888 extern void push_to_sequence
PROTO((rtx
));
889 extern void end_sequence
PROTO((void));
890 extern rtx gen_sequence
PROTO((void));
891 extern rtx immed_double_const
PROTO((HOST_WIDE_INT
, HOST_WIDE_INT
, enum machine_mode
));
892 extern rtx force_const_mem
PROTO((enum machine_mode
, rtx
));
893 extern rtx force_reg
PROTO((enum machine_mode
, rtx
));
894 extern rtx get_pool_constant
PROTO((rtx
));
895 extern enum machine_mode get_pool_mode
PROTO((rtx
));
896 extern int get_pool_offset
PROTO((rtx
));
897 extern rtx simplify_subtraction
PROTO((rtx
));
898 extern rtx assign_stack_local
PROTO((enum machine_mode
,
899 HOST_WIDE_INT
, int));
900 extern rtx assign_stack_temp
PROTO((enum machine_mode
,
901 HOST_WIDE_INT
, int));
902 extern rtx assign_temp
PROTO((union tree_node
*,
904 extern rtx protect_from_queue
PROTO((rtx
, int));
905 extern void emit_queue
PROTO((void));
906 extern rtx emit_move_insn
PROTO((rtx
, rtx
));
907 extern rtx emit_insn_before
PROTO((rtx
, rtx
));
908 extern rtx emit_jump_insn_before
PROTO((rtx
, rtx
));
909 extern rtx emit_call_insn_before
PROTO((rtx
, rtx
));
910 extern rtx emit_barrier_before
PROTO((rtx
));
911 extern rtx emit_note_before
PROTO((int, rtx
));
912 extern rtx emit_insn_after
PROTO((rtx
, rtx
));
913 extern rtx emit_jump_insn_after
PROTO((rtx
, rtx
));
914 extern rtx emit_barrier_after
PROTO((rtx
));
915 extern rtx emit_label_after
PROTO((rtx
, rtx
));
916 extern rtx emit_note_after
PROTO((int, rtx
));
917 extern rtx emit_line_note_after
PROTO((char *, int, rtx
));
918 extern rtx emit_insn
PROTO((rtx
));
919 extern rtx emit_insns
PROTO((rtx
));
920 extern rtx emit_insns_before
PROTO((rtx
, rtx
));
921 extern rtx emit_insns_after
PROTO((rtx
, rtx
));
922 extern rtx emit_jump_insn
PROTO((rtx
));
923 extern rtx emit_call_insn
PROTO((rtx
));
924 extern rtx emit_label
PROTO((rtx
));
925 extern rtx emit_barrier
PROTO((void));
926 extern rtx emit_line_note
PROTO((char *, int));
927 extern rtx emit_note
PROTO((char *, int));
928 extern rtx emit_line_note_force
PROTO((char *, int));
929 extern rtx make_insn_raw
PROTO((rtx
));
930 extern rtx previous_insn
PROTO((rtx
));
931 extern rtx next_insn
PROTO((rtx
));
932 extern rtx prev_nonnote_insn
PROTO((rtx
));
933 extern rtx next_nonnote_insn
PROTO((rtx
));
934 extern rtx prev_real_insn
PROTO((rtx
));
935 extern rtx next_real_insn
PROTO((rtx
));
936 extern rtx prev_active_insn
PROTO((rtx
));
937 extern rtx next_active_insn
PROTO((rtx
));
938 extern rtx prev_label
PROTO((rtx
));
939 extern rtx next_label
PROTO((rtx
));
940 extern rtx next_cc0_user
PROTO((rtx
));
941 extern rtx prev_cc0_setter
PROTO((rtx
));
942 extern rtx next_nondeleted_insn
PROTO((rtx
));
943 extern enum rtx_code reverse_condition
PROTO((enum rtx_code
));
944 extern enum rtx_code swap_condition
PROTO((enum rtx_code
));
945 extern enum rtx_code unsigned_condition
PROTO((enum rtx_code
));
946 extern enum rtx_code signed_condition
PROTO((enum rtx_code
));
947 extern rtx find_equiv_reg
PROTO((rtx
, rtx
, enum reg_class
, int, short *, int, enum machine_mode
));
948 extern rtx squeeze_notes
PROTO((rtx
, rtx
));
949 extern rtx delete_insn
PROTO((rtx
));
950 extern void delete_jump
PROTO((rtx
));
951 extern rtx get_label_before
PROTO((rtx
));
952 extern rtx get_label_after
PROTO((rtx
));
953 extern rtx follow_jumps
PROTO((rtx
));
954 extern rtx adj_offsettable_operand
PROTO((rtx
, int));
955 extern rtx try_split
PROTO((rtx
, rtx
, int));
956 extern rtx split_insns
PROTO((rtx
, rtx
));
957 extern rtx simplify_unary_operation
PROTO((enum rtx_code
, enum machine_mode
, rtx
, enum machine_mode
));
958 extern rtx simplify_binary_operation
PROTO((enum rtx_code
, enum machine_mode
, rtx
, rtx
));
959 extern rtx simplify_ternary_operation
PROTO((enum rtx_code
, enum machine_mode
, enum machine_mode
, rtx
, rtx
, rtx
));
960 extern rtx simplify_relational_operation
PROTO((enum rtx_code
, enum machine_mode
, rtx
, rtx
));
961 extern rtx nonlocal_label_rtx_list
PROTO((void));
962 extern rtx gen_move_insn
PROTO((rtx
, rtx
));
963 extern rtx gen_jump
PROTO((rtx
));
964 extern rtx gen_beq
PROTO((rtx
));
965 extern rtx gen_bge
PROTO((rtx
));
966 extern rtx gen_ble
PROTO((rtx
));
967 extern rtx gen_mem_addressof
PROTO((rtx
, union tree_node
*));
968 extern rtx eliminate_constant_term
PROTO((rtx
, rtx
*));
969 extern rtx expand_complex_abs
PROTO((enum machine_mode
, rtx
, rtx
, int));
970 extern enum machine_mode choose_hard_reg_mode
PROTO((int, int));
972 /* Functions in rtlanal.c */
974 extern int rtx_unstable_p
PROTO((rtx
));
975 extern int rtx_varies_p
PROTO((rtx
));
976 extern int rtx_addr_varies_p
PROTO((rtx
));
977 extern HOST_WIDE_INT get_integer_term
PROTO((rtx
));
978 extern rtx get_related_value
PROTO((rtx
));
979 extern int reg_mentioned_p
PROTO((rtx
, rtx
));
980 extern int reg_referenced_p
PROTO((rtx
, rtx
));
981 extern int reg_used_between_p
PROTO((rtx
, rtx
, rtx
));
982 extern int reg_referenced_between_p
PROTO((rtx
, rtx
, rtx
));
983 extern int reg_set_between_p
PROTO((rtx
, rtx
, rtx
));
984 extern int regs_set_between_p
PROTO((rtx
, rtx
, rtx
));
985 extern int modified_between_p
PROTO((rtx
, rtx
, rtx
));
986 extern int no_labels_between_p
PROTO((rtx
, rtx
));
987 extern int modified_in_p
PROTO((rtx
, rtx
));
988 extern int reg_set_p
PROTO((rtx
, rtx
));
989 extern rtx single_set
PROTO((rtx
));
990 extern int multiple_sets
PROTO((rtx
));
991 extern rtx find_last_value
PROTO((rtx
, rtx
*, rtx
));
992 extern int refers_to_regno_p
PROTO((int, int, rtx
, rtx
*));
993 extern int reg_overlap_mentioned_p
PROTO((rtx
, rtx
));
994 extern void note_stores
PROTO((rtx
, void (*)()));
995 extern rtx reg_set_last
PROTO((rtx
, rtx
));
996 extern int rtx_equal_p
PROTO((rtx
, rtx
));
997 extern int dead_or_set_p
PROTO((rtx
, rtx
));
998 extern int dead_or_set_regno_p
PROTO((rtx
, int));
999 extern rtx find_reg_note
PROTO((rtx
, enum reg_note
, rtx
));
1000 extern rtx find_regno_note
PROTO((rtx
, enum reg_note
, int));
1001 extern int find_reg_fusage
PROTO((rtx
, enum rtx_code
, rtx
));
1002 extern int find_regno_fusage
PROTO((rtx
, enum rtx_code
, int));
1003 extern void remove_note
PROTO((rtx
, rtx
));
1004 extern int side_effects_p
PROTO((rtx
));
1005 extern int volatile_refs_p
PROTO((rtx
));
1006 extern int volatile_insn_p
PROTO((rtx
));
1007 extern int may_trap_p
PROTO((rtx
));
1008 extern int inequality_comparisons_p
PROTO ((rtx
));
1009 extern rtx replace_rtx
PROTO((rtx
, rtx
, rtx
));
1010 extern rtx replace_regs
PROTO((rtx
, rtx
*, int, int));
1011 extern int computed_jump_p
PROTO((rtx
));
1012 typedef int (*rtx_function
) PROTO((rtx
*, void *));
1013 extern int for_each_rtx
PROTO((rtx
*, rtx_function
, void *));
1017 extern rtx find_use_as_address
PROTO((rtx
, rtx
, HOST_WIDE_INT
));
1021 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1022 Always at least 3, since the combiner could put that many togetherm
1023 and we want this to remain correct for all the remaining passes. */
1025 extern int max_parallel
;
1027 /* Free up register info memory. */
1028 extern void free_reg_info
PROTO((void));
1031 extern int asm_noperands
PROTO((rtx
));
1032 extern char *decode_asm_operands
PROTO((rtx
, rtx
*, rtx
**, char **, enum machine_mode
*));
1034 extern enum reg_class reg_preferred_class
PROTO((int));
1035 extern enum reg_class reg_alternate_class
PROTO((int));
1037 extern rtx get_first_nonparm_insn
PROTO((void));
1039 /* Standard pieces of rtx, to be substituted directly into things. */
1040 #define pc_rtx (&global_rtl.pc_val)
1041 #define cc0_rtx (&global_rtl.cc0_val)
1043 #define MAX_SAVED_CONST_INT 64
1044 extern struct rtx_def const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1046 #define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT])
1047 #define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1])
1048 #define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2])
1049 #define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1])
1050 extern rtx const_true_rtx
;
1052 extern rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1054 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1055 same as VOIDmode. */
1057 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1059 /* Likewise, for the constants 1 and 2. */
1061 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1062 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1064 extern struct _global_rtl
1066 struct rtx_def pc_val
, cc0_val
;
1067 struct rtx_def stack_pointer_val
, frame_pointer_val
;
1068 struct rtx_def hard_frame_pointer_val
;
1069 struct rtx_def arg_pointer_val
;
1070 struct rtx_def virtual_incoming_args_val
;
1071 struct rtx_def virtual_stack_vars_val
;
1072 struct rtx_def virtual_stack_dynamic_val
;
1073 struct rtx_def virtual_outgoing_args_val
;
1074 struct rtx_def virtual_cfa_val
;
1077 /* All references to certain hard regs, except those created
1078 by allocating pseudo regs into them (when that's possible),
1079 go through these unique rtx objects. */
1080 #define stack_pointer_rtx (&global_rtl.stack_pointer_val)
1081 #define frame_pointer_rtx (&global_rtl.frame_pointer_val)
1083 extern rtx pic_offset_table_rtx
;
1084 extern rtx struct_value_rtx
;
1085 extern rtx struct_value_incoming_rtx
;
1086 extern rtx static_chain_rtx
;
1087 extern rtx static_chain_incoming_rtx
;
1088 extern rtx return_address_pointer_rtx
;
1090 /* Include the RTL generation functions. */
1096 /* There are some RTL codes that require special attention; the
1097 generation functions included above do the raw handling. If you
1098 add to this list, modify special_rtx in gengenrtl.c as well. You
1099 should also modify gen_rtx to use the special function. */
1101 extern rtx gen_rtx_CONST_INT
PROTO((enum machine_mode
, HOST_WIDE_INT
));
1102 extern rtx gen_rtx_REG
PROTO((enum machine_mode
, int));
1103 extern rtx gen_rtx_MEM
PROTO((enum machine_mode
, rtx
));
1105 /* We need the cast here to ensure that we get the same result both with
1106 and without prototypes. */
1107 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1110 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1111 is used to represent the frame pointer. This is because the
1112 hard frame pointer and the automatic variables are separated by an amount
1113 that cannot be determined until after register allocation. We can assume
1114 that in this case ELIMINABLE_REGS will be defined, one action of which
1115 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1116 #ifndef HARD_FRAME_POINTER_REGNUM
1117 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1120 /* For register elimination to work properly these hard_frame_pointer_rtx,
1121 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1122 the same register. */
1123 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1124 #define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val)
1126 #define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1129 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1130 #define arg_pointer_rtx (&global_rtl.frame_pointer_val)
1132 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1133 #define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1135 #define arg_pointer_rtx (&global_rtl.arg_pointer_val)
1139 /* Virtual registers are used during RTL generation to refer to locations into
1140 the stack frame when the actual location isn't known until RTL generation
1141 is complete. The routine instantiate_virtual_regs replaces these with
1142 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1145 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1147 /* This points to the first word of the incoming arguments passed on the stack,
1148 either by the caller or by the callee when pretending it was passed by the
1151 #define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val)
1153 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1155 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1156 variable on the stack. Otherwise, it points to the first variable on
1159 #define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val)
1161 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1163 /* This points to the location of dynamically-allocated memory on the stack
1164 immediately after the stack pointer has been adjusted by the amount
1167 #define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val)
1169 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1171 /* This points to the location in the stack at which outgoing arguments should
1172 be written when the stack is pre-pushed (arguments pushed using push
1173 insns always use sp). */
1175 #define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val)
1177 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1179 /* This points to the Canonical Frame Address of the function. This
1180 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1181 but is calculated relative to the arg pointer for simplicity; the
1182 frame pointer nor stack pointer are necessarily fixed relative to
1183 the CFA until after reload. */
1185 #define virtual_cfa_rtx (&global_rtl.virtual_cfa_val)
1187 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1189 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1191 extern rtx find_next_ref
PROTO((rtx
, rtx
));
1192 extern rtx
*find_single_use
PROTO((rtx
, rtx
, rtx
*));
1194 extern rtx output_constant_def
PROTO((union tree_node
*));
1195 extern rtx immed_real_const
PROTO((union tree_node
*));
1196 extern union tree_node
*make_tree
PROTO((union tree_node
*, rtx
));
1198 /* Define a default value for STORE_FLAG_VALUE. */
1200 #ifndef STORE_FLAG_VALUE
1201 #define STORE_FLAG_VALUE 1
1204 /* Nonzero after the second flow pass has completed.
1205 Set to 1 or 0 by toplev.c */
1206 extern int flow2_completed
;
1208 /* Nonzero after end of reload pass.
1209 Set to 1 or 0 by reload1.c. */
1211 extern int reload_completed
;
1213 /* Set to 1 while reload_as_needed is operating.
1214 Required by some machines to handle any generated moves differently. */
1216 extern int reload_in_progress
;
1218 /* If this is nonzero, we do not bother generating VOLATILE
1219 around volatile memory references, and we are willing to
1220 output indirect addresses. If cse is to follow, we reject
1221 indirect addresses so a useful potential cse is generated;
1222 if it is used only once, instruction combination will produce
1223 the same indirect address eventually. */
1224 extern int cse_not_expected
;
1226 /* Set to nonzero before life analysis to indicate that it is unsafe to
1227 generate any new pseudo registers. */
1228 extern int no_new_pseudos
;
1230 /* Indexed by pseudo register number, gives the rtx for that pseudo.
1231 Allocated in parallel with regno_pointer_flag. */
1232 extern rtx
*regno_reg_rtx
;
1234 /* Vector indexed by regno; contain the alignment in bytes and type
1235 pointed to for a register that contains a pointer, if known. */
1236 extern char *regno_pointer_align
;
1237 #define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO]
1239 /* Translates rtx code to tree code, for those codes needed by
1240 REAL_ARITHMETIC. The function returns an int because the caller may not
1241 know what `enum tree_code' means. */
1243 extern int rtx_to_tree_code
PROTO((enum rtx_code
));
1246 extern void obfree
PROTO ((char *));
1248 extern void gcc_obstack_init
PROTO ((struct obstack
*));
1249 extern void pop_obstacks
PROTO ((void));
1250 extern void push_obstacks
PROTO ((struct obstack
*,
1253 extern int read_skip_spaces
PROTO ((FILE *));
1257 struct cse_basic_block_data
;
1258 extern int rtx_cost
PROTO ((rtx
, enum rtx_code
));
1259 extern void delete_trivially_dead_insns
PROTO ((rtx
, int));
1261 extern int cse_main
PROTO ((rtx
, int, int, FILE *));
1263 extern void cse_end_of_basic_block
PROTO ((rtx
,
1264 struct cse_basic_block_data
*,
1268 extern int comparison_dominates_p
PROTO ((enum rtx_code
, enum rtx_code
));
1269 extern int condjump_p
PROTO ((rtx
));
1270 extern int simplejump_p
PROTO ((rtx
));
1271 extern int sets_cc0_p
PROTO ((rtx
));
1272 extern int invert_jump
PROTO ((rtx
, rtx
));
1273 extern int rtx_renumbered_equal_p
PROTO ((rtx
, rtx
));
1274 extern int true_regnum
PROTO ((rtx
));
1275 extern int redirect_jump
PROTO ((rtx
, rtx
));
1276 extern void jump_optimize
PROTO ((rtx
, int, int, int));
1277 extern void thread_jumps
PROTO ((rtx
, int, int));
1278 extern int redirect_exp
PROTO ((rtx
*, rtx
, rtx
, rtx
));
1279 extern int rtx_equal_for_thread_p
PROTO ((rtx
, rtx
, rtx
));
1280 extern int invert_exp
PROTO ((rtx
, rtx
));
1281 extern int can_reverse_comparison_p
PROTO ((rtx
, rtx
));
1282 extern void delete_for_peephole
PROTO ((rtx
, rtx
));
1283 extern int condjump_in_parallel_p
PROTO ((rtx
));
1285 /* Flags for jump_optimize() */
1286 #define JUMP_CROSS_JUMP 1
1287 #define JUMP_NOOP_MOVES 1
1288 #define JUMP_AFTER_REGSCAN 1
1290 /* In emit-rtl.c. */
1291 extern int max_reg_num
PROTO ((void));
1292 extern int max_label_num
PROTO ((void));
1293 extern int get_first_label_num
PROTO ((void));
1294 extern void delete_insns_since
PROTO ((rtx
));
1295 extern void mark_reg_pointer
PROTO ((rtx
, int));
1296 extern void mark_user_reg
PROTO ((rtx
));
1297 extern void reset_used_flags
PROTO ((rtx
));
1298 extern void reorder_insns
PROTO ((rtx
, rtx
, rtx
));
1299 extern int get_max_uid
PROTO ((void));
1300 extern int in_sequence_p
PROTO ((void));
1301 extern void force_next_line_note
PROTO ((void));
1302 extern void init_emit
PROTO ((void));
1303 extern void init_emit_once
PROTO ((int));
1304 extern void push_topmost_sequence
PROTO ((void));
1305 extern void pop_topmost_sequence
PROTO ((void));
1306 extern int subreg_realpart_p
PROTO ((rtx
));
1307 extern void reverse_comparison
PROTO ((rtx
));
1308 extern void set_new_first_and_last_insn
PROTO ((rtx
, rtx
));
1309 extern void set_new_first_and_last_label_num
PROTO ((int, int));
1310 extern void unshare_all_rtl
PROTO ((rtx
));
1311 extern void set_last_insn
PROTO ((rtx
));
1312 extern void link_cc0_insns
PROTO ((rtx
));
1313 extern void add_insn
PROTO ((rtx
));
1314 extern void add_insn_before
PROTO ((rtx
, rtx
));
1315 extern void add_insn_after
PROTO ((rtx
, rtx
));
1316 extern void reorder_insns_with_line_notes
PROTO ((rtx
, rtx
, rtx
));
1317 extern void emit_insn_after_with_line_notes
PROTO ((rtx
, rtx
, rtx
));
1318 extern enum rtx_code classify_insn
PROTO ((rtx
));
1319 extern void init_virtual_regs
PROTO ((void));
1320 extern rtx emit
PROTO ((rtx
));
1321 /* Query and clear/ restore no_line_numbers. This is used by the
1322 switch / case handling in stmt.c to give proper line numbers in
1323 warnings about unreachable code. */
1324 int force_line_numbers
PROTO((void));
1325 void restore_line_number_status
PROTO((int old_value
));
1327 /* In insn-emit.c */
1328 extern void add_clobbers
PROTO ((rtx
, int));
1331 extern void combine_instructions
PROTO ((rtx
, int));
1332 extern int extended_count
PROTO ((rtx
, enum machine_mode
, int));
1333 extern rtx remove_death
PROTO ((int, rtx
));
1335 extern void dump_combine_stats
PROTO ((FILE *));
1336 extern void dump_combine_total_stats
PROTO ((FILE *));
1341 extern void schedule_insns
PROTO ((FILE *));
1344 extern void fix_sched_param
PROTO ((char *, char *));
1347 /* In print-rtl.c */
1348 extern void debug_rtx
PROTO ((rtx
));
1349 extern void debug_rtx_list
PROTO ((rtx
, int));
1350 extern rtx debug_rtx_find
PROTO ((rtx
, int));
1352 extern void print_rtl
PROTO ((FILE *, rtx
));
1353 extern int print_rtl_single
PROTO ((FILE *, rtx
));
1354 extern void print_inline_rtx
PROTO ((FILE *, rtx
, int));
1358 extern void init_loop
PROTO ((void));
1360 extern void loop_optimize
PROTO ((rtx
, FILE *, int, int));
1362 extern void record_excess_regs
PROTO ((rtx
, rtx
, rtx
*));
1365 extern void reposition_prologue_and_epilogue_notes
PROTO ((rtx
));
1366 extern void thread_prologue_and_epilogue_insns
PROTO ((rtx
));
1367 extern void use_variable
PROTO ((rtx
));
1368 extern HOST_WIDE_INT get_frame_size
PROTO ((void));
1369 extern void preserve_rtl_expr_result
PROTO ((rtx
));
1370 extern void mark_temp_addr_taken
PROTO ((rtx
));
1371 extern void update_temp_slot_address
PROTO ((rtx
, rtx
));
1372 extern void use_variable_after
PROTO ((rtx
, rtx
));
1373 extern void purge_addressof
PROTO ((rtx
));
1376 extern int operands_match_p
PROTO ((rtx
, rtx
));
1377 extern int safe_from_earlyclobber
PROTO ((rtx
, rtx
));
1380 extern void expand_null_return
PROTO((void));
1381 extern void emit_jump
PROTO ((rtx
));
1382 extern int preserve_subexpressions_p
PROTO ((void));
1385 extern void init_expr_once
PROTO ((void));
1386 extern void move_by_pieces
PROTO ((rtx
, rtx
, int, int));
1391 extern void stupid_life_analysis
PROTO ((rtx
, int, FILE *));
1395 extern void allocate_for_life_analysis
PROTO ((void));
1396 extern void recompute_reg_usage
PROTO ((rtx
, int));
1398 extern void dump_flow_info
PROTO ((FILE *));
1400 extern void free_bb_memory
PROTO ((void));
1403 extern void init_expmed
PROTO ((void));
1404 extern void expand_inc
PROTO ((rtx
, rtx
));
1405 extern void expand_dec
PROTO ((rtx
, rtx
));
1406 extern rtx expand_mult_highpart
PROTO ((enum machine_mode
, rtx
,
1407 unsigned HOST_WIDE_INT
, rtx
,
1412 extern void gcse_main
PROTO ((rtx
, FILE *));
1416 extern void mark_elimination
PROTO ((int, int));
1418 extern int global_alloc
PROTO ((FILE *));
1419 extern void dump_global_regs
PROTO ((FILE *));
1422 extern void retry_global_alloc
PROTO ((int, HARD_REG_SET
));
1426 extern int reg_classes_intersect_p
PROTO ((enum reg_class
, enum reg_class
));
1427 extern int reg_class_subset_p
PROTO ((enum reg_class
, enum reg_class
));
1428 extern void globalize_reg
PROTO ((int));
1429 extern void init_regs
PROTO ((void));
1430 extern void init_reg_sets
PROTO ((void));
1431 extern void regset_release_memory
PROTO ((void));
1432 extern void regclass_init
PROTO ((void));
1433 extern void regclass
PROTO ((rtx
, int));
1434 extern void reg_scan
PROTO ((rtx
, int, int));
1435 extern void reg_scan_update
PROTO ((rtx
, rtx
, int));
1436 extern void fix_register
PROTO ((char *, int, int));
1440 extern void regmove_optimize
PROTO ((rtx
, int, FILE *));
1445 extern void dbr_schedule
PROTO ((rtx
, FILE *));
1449 extern void init_optabs
PROTO ((void));
1451 /* In local-alloc.c */
1453 extern void dump_local_alloc
PROTO ((FILE *));
1455 extern void local_alloc
PROTO ((void));
1456 extern int function_invariant_p
PROTO ((rtx
));
1459 extern void reload_cse_regs
PROTO ((rtx
));
1460 extern void init_reload
PROTO ((void));
1461 extern void mark_home_live
PROTO ((int));
1463 extern int reload
PROTO ((rtx
, int, FILE *));
1466 /* In caller-save.c */
1467 extern void init_caller_save
PROTO ((void));
1470 extern void init_branch_prob
PROTO ((char *));
1472 extern void branch_prob
PROTO ((rtx
, FILE *));
1473 extern void end_branch_prob
PROTO ((FILE *));
1475 extern void output_func_start_profiler
PROTO ((void));
1477 /* In reg-stack.c */
1479 extern void reg_to_stack
PROTO ((rtx
, FILE *));
1481 extern int stack_regs_mentioned_p
PROTO ((rtx
));
1483 /* In fold-const.c */
1484 extern int add_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1485 HOST_WIDE_INT
, HOST_WIDE_INT
,
1486 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1487 extern int neg_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1488 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1489 extern int mul_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1490 HOST_WIDE_INT
, HOST_WIDE_INT
,
1491 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1492 extern void lshift_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1493 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1494 HOST_WIDE_INT
*, int));
1495 extern void rshift_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1497 HOST_WIDE_INT
*, HOST_WIDE_INT
*, int));
1498 extern void lrotate_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1499 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1501 extern void rrotate_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1502 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1506 /* Emit library call. */
1507 extern void emit_library_call
PVPROTO ((rtx
, int, enum machine_mode
,
1509 extern rtx emit_library_call_value
PVPROTO((rtx
, rtx
, int,
1514 extern int set_dominates_use
PROTO ((int, int, int, rtx
, rtx
));
1517 extern void bss_section
PROTO ((void));
1518 extern int in_data_section
PROTO ((void));
1519 extern int supports_one_only
PROTO ((void));
1522 extern void init_rtl
PROTO ((void));
1523 extern void rtx_free
PROTO ((rtx
));
1526 extern int true_dependence
PROTO ((rtx
, enum machine_mode
, rtx
,
1528 extern int read_dependence
PROTO ((rtx
, rtx
));
1529 extern int anti_dependence
PROTO ((rtx
, rtx
));
1530 extern int output_dependence
PROTO ((rtx
, rtx
));
1531 extern void init_alias_once
PROTO ((void));
1532 extern void init_alias_analysis
PROTO ((void));
1533 extern void end_alias_analysis
PROTO ((void));
1535 extern void record_base_value
PROTO ((int, rtx
, int));
1536 extern void record_alias_subset
PROTO ((int, int));
1537 extern rtx addr_side_effect_eval
PROTO ((rtx
, int, int));