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 #include "gansidecl.h"
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 */
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 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx)
213 /* 1 if X is a REG. */
215 #define REG_P(X) (GET_CODE (X) == REG)
217 /* 1 if X is a constant value that is an integer. */
219 #define CONSTANT_P(X) \
220 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
221 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
222 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
223 || GET_CODE (X) == CONSTANT_P_RTX)
225 /* General accessor macros for accessing the fields of an rtx. */
227 #define XEXP(RTX, N) ((RTX)->fld[N].rtx)
228 #define XINT(RTX, N) ((RTX)->fld[N].rtint)
229 #define XWINT(RTX, N) ((RTX)->fld[N].rtwint)
230 #define XSTR(RTX, N) ((RTX)->fld[N].rtstr)
231 #define XVEC(RTX, N) ((RTX)->fld[N].rtvec)
232 #define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem)
233 #define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx)
234 #define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit)
235 #define XTREE(RTX, N) ((RTX)->fld[N].rttree)
238 /* ACCESS MACROS for particular fields of insns. */
240 /* Holds a unique number for each insn.
241 These are not necessarily sequentially increasing. */
242 #define INSN_UID(INSN) ((INSN)->fld[0].rtint)
244 /* Chain insns together in sequence. */
245 #define PREV_INSN(INSN) ((INSN)->fld[1].rtx)
246 #define NEXT_INSN(INSN) ((INSN)->fld[2].rtx)
248 /* The body of an insn. */
249 #define PATTERN(INSN) ((INSN)->fld[3].rtx)
251 /* Code number of instruction, from when it was recognized.
252 -1 means this instruction has not been recognized yet. */
253 #define INSN_CODE(INSN) ((INSN)->fld[4].rtint)
255 /* Set up in flow.c; empty before then.
256 Holds a chain of INSN_LIST rtx's whose first operands point at
257 previous insns with direct data-flow connections to this one.
258 That means that those insns set variables whose next use is in this insn.
259 They are always in the same basic block as this insn. */
260 #define LOG_LINKS(INSN) ((INSN)->fld[5].rtx)
262 /* 1 if insn has been deleted. */
263 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
265 /* 1 if insn is a call to a const function. */
266 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
268 /* 1 if insn is a branch that should not unconditionally execute its
269 delay slots, i.e., it is an annulled branch. */
270 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
272 /* 1 if insn is in a delay slot and is from the target of the branch. If
273 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
274 executed if the branch is taken. For annulled branches with this bit
275 clear, the insn should be executed only if the branch is not taken. */
276 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
278 /* Holds a list of notes on what this insn does to various REGs.
279 It is a chain of EXPR_LIST rtx's, where the second operand
280 is the chain pointer and the first operand is the REG being described.
281 The mode field of the EXPR_LIST contains not a real machine mode
282 but a value that says what this note says about the REG:
283 REG_DEAD means that the value in REG dies in this insn (i.e., it is
284 not needed past this insn). If REG is set in this insn, the REG_DEAD
285 note may, but need not, be omitted.
286 REG_INC means that the REG is autoincremented or autodecremented.
287 REG_EQUIV describes the insn as a whole; it says that the insn
288 sets a register to a constant value or to be equivalent to a memory
289 address. If the register is spilled to the stack then the constant
290 value should be substituted for it. The contents of the REG_EQUIV
291 is the constant value or memory address, which may be different
292 from the source of the SET although it has the same value. A
293 REG_EQUIV note may also appear on an insn which copies a register
294 parameter to a pseudo-register, if there is a memory address which
295 could be used to hold that pseudo-register throughout the function.
296 REG_EQUAL is like REG_EQUIV except that the destination
297 is only momentarily equal to the specified rtx. Therefore, it
298 cannot be used for substitution; but it can be used for cse.
299 REG_RETVAL means that this insn copies the return-value of
300 a library call out of the hard reg for return values. This note
301 is actually an INSN_LIST and it points to the first insn involved
302 in setting up arguments for the call. flow.c uses this to delete
303 the entire library call when its result is dead.
304 REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
305 of the library call and points at the one that has the REG_RETVAL.
306 REG_WAS_0 says that the register set in this insn held 0 before the insn.
307 The contents of the note is the insn that stored the 0.
308 If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
309 The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
310 REG_NONNEG means that the register is always nonnegative during
311 the containing loop. This is used in branches so that decrement and
312 branch instructions terminating on zero can be matched. There must be
313 an insn pattern in the md file named `decrement_and_branch_until_zero'
314 or else this will never be added to any instructions.
315 REG_NO_CONFLICT means there is no conflict *after this insn*
316 between the register in the note and the destination of this insn.
317 REG_UNUSED identifies a register set in this insn and never used.
318 REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
319 CC0, respectively. Normally, these are required to be consecutive insns,
320 but we permit putting a cc0-setting insn in the delay slot of a branch
321 as long as only one copy of the insn exists. In that case, these notes
322 point from one to the other to allow code generation to determine what
323 any require information and to properly update CC_STATUS.
324 REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
325 say that the CODE_LABEL contained in the REG_LABEL note is used
327 REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
328 dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
329 (write after write) dependencies. Data dependencies, which are the only
330 type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
331 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
332 -fbranch-probabilities is given. It has an integer value. For jumps,
333 it is the probability that this is a taken branch. For calls, it is the
334 probability that this call won't return.
335 REG_EXEC_COUNT is attached to the first insn of each basic block, and
336 the first insn after each CALL_INSN. It indicates how many times this
338 REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
339 allocations for targets where SETJMP_VIA_SAVE_AREA is true.
340 REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
341 flags computed by get_jump_flags() after dbr scheduling is complete. */
344 #define REG_NOTES(INSN) ((INSN)->fld[6].rtx)
346 #define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags)
348 /* Don't forget to change reg_note_name in rtl.c. */
349 enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4,
350 REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7,
351 REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10,
352 REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13,
353 REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15, REG_BR_PROB = 16,
354 REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19,
355 REG_BR_PRED = 20, REG_EH_CONTEXT = 21 };
356 /* The base value for branch probability notes. */
357 #define REG_BR_PROB_BASE 10000
359 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
360 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
361 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
363 /* Names for REG_NOTE's in EXPR_LIST insn's. */
365 extern char *reg_note_name[];
366 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
368 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
369 USE and CLOBBER expressions.
370 USE expressions list the registers filled with arguments that
371 are passed to the function.
372 CLOBBER expressions document the registers explicitly clobbered
374 Pseudo registers can not be mentioned in this list. */
375 #define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx)
377 /* The label-number of a code-label. The assembler label
378 is made from `L' and the label-number printed in decimal.
379 Label numbers are unique in a compilation. */
380 #define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint)
382 #define LINE_NUMBER NOTE
384 /* In a NOTE that is a line number, this is a string for the file name that the
385 line is in. We use the same field to record block numbers temporarily in
386 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
387 between ints and pointers if we use a different macro for the block number.)
388 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
389 information as a rtx in the field. */
391 #define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr)
392 #define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint)
393 #define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx)
394 #define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx)
396 /* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new
397 block node for a live range block. */
398 #define NOTE_BLOCK_LIVE_RANGE_BLOCK -1
400 /* In a NOTE that is a line number, this is the line number.
401 Other kinds of NOTEs are identified by negative numbers here. */
402 #define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint)
404 /* Codes that appear in the NOTE_LINE_NUMBER field
405 for kinds of notes that are not line numbers.
407 Notice that we do not try to use zero here for any of
408 the special note codes because sometimes the source line
409 actually can be zero! This happens (for example) when we
410 are generating code for the per-translation-unit constructor
411 and destructor routines for some C++ translation unit.
413 If you should change any of the following values, or if you
414 should add a new value here, don't forget to change the
415 note_insn_name array in rtl.c. */
417 /* This note is used to get rid of an insn
418 when it isn't safe to patch the insn out of the chain. */
419 #define NOTE_INSN_DELETED -1
420 #define NOTE_INSN_BLOCK_BEG -2
421 #define NOTE_INSN_BLOCK_END -3
422 #define NOTE_INSN_LOOP_BEG -4
423 #define NOTE_INSN_LOOP_END -5
424 /* This kind of note is generated at the end of the function body,
425 just before the return insn or return label.
426 In an optimizing compilation it is deleted by the first jump optimization,
427 after enabling that optimizer to determine whether control can fall
428 off the end of the function body without a return statement. */
429 #define NOTE_INSN_FUNCTION_END -6
430 /* This kind of note is generated just after each call to `setjmp', et al. */
431 #define NOTE_INSN_SETJMP -7
432 /* Generated at the place in a loop that `continue' jumps to. */
433 #define NOTE_INSN_LOOP_CONT -8
434 /* Generated at the start of a duplicated exit test. */
435 #define NOTE_INSN_LOOP_VTOP -9
436 /* This marks the point immediately after the last prologue insn. */
437 #define NOTE_INSN_PROLOGUE_END -10
438 /* This marks the point immediately prior to the first epilogue insn. */
439 #define NOTE_INSN_EPILOGUE_BEG -11
440 /* Generated in place of user-declared labels when they are deleted. */
441 #define NOTE_INSN_DELETED_LABEL -12
442 /* This note indicates the start of the real body of the function,
443 i.e. the point just after all of the parms have been moved into
445 #define NOTE_INSN_FUNCTION_BEG -13
446 /* These note where exception handling regions begin and end. */
447 #define NOTE_INSN_EH_REGION_BEG -14
448 #define NOTE_INSN_EH_REGION_END -15
449 /* Generated whenever a duplicate line number note is output. For example,
450 one is output after the end of an inline function, in order to prevent
451 the line containing the inline call from being counted twice in gcov. */
452 #define NOTE_REPEATED_LINE_NUMBER -16
454 /* Start/end of a live range region, where pseudos allocated on the stack can
455 be allocated to temporary registers. */
456 #define NOTE_INSN_RANGE_START -17
457 #define NOTE_INSN_RANGE_END -18
458 /* Record which registers are currently live. */
459 #define NOTE_INSN_LIVE -19
461 #if 0 /* These are not used, and I don't know what they were for. --rms. */
462 #define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr)
463 #define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint)
464 #define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx)
465 #define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint)
466 #define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint)
469 /* Names for NOTE insn's other than line numbers. */
471 extern char *note_insn_name[];
472 #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
474 /* The name of a label, in case it corresponds to an explicit label
475 in the input source code. */
476 #define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr)
478 /* In jump.c, each label contains a count of the number
479 of LABEL_REFs that point at it, so unused labels can be deleted. */
480 #define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint)
482 /* The original regno this ADDRESSOF was built for. */
483 #define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint)
485 /* The variable in the register we took the address of. */
486 #define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2))
487 #define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T))
489 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
490 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
491 be decremented and possibly the label can be deleted. */
492 #define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx)
494 /* Once basic blocks are found in flow.c,
495 each CODE_LABEL starts a chain that goes through
496 all the LABEL_REFs that jump to that label.
497 The chain eventually winds up at the CODE_LABEL; it is circular. */
498 #define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx)
500 /* This is the field in the LABEL_REF through which the circular chain
501 of references to a particular label is linked.
502 This chain is set up in flow.c. */
504 #define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx)
506 /* Once basic blocks are found in flow.c,
507 Each LABEL_REF points to its containing instruction with this field. */
509 #define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx)
511 /* For a REG rtx, REGNO extracts the register number. */
513 #define REGNO(RTX) ((RTX)->fld[0].rtint)
515 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
516 is the current function's return value. */
518 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
520 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
521 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
523 /* For a CONST_INT rtx, INTVAL extracts the integer. */
525 #define INTVAL(RTX) ((RTX)->fld[0].rtwint)
527 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
528 SUBREG_WORD extracts the word-number. */
530 #define SUBREG_REG(RTX) ((RTX)->fld[0].rtx)
531 #define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint)
533 /* 1 if the REG contained in SUBREG_REG is already known to be
534 sign- or zero-extended from the mode of the SUBREG to the mode of
535 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
538 When used as a LHS, is means that this extension must be done
539 when assigning to SUBREG_REG. */
541 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
542 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
544 /* Access various components of an ASM_OPERANDS rtx. */
546 #define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0)
547 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1)
548 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2)
549 #define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3)
550 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4)
551 #define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N))
552 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3)
553 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0)
554 #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N)))
555 #define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5)
556 #define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6)
558 /* For a MEM rtx, 1 if it's a volatile reference.
559 Also in an ASM_OPERANDS rtx. */
560 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
562 /* For a MEM rtx, 1 if it refers to a field of an aggregate. */
563 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
565 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
566 set, and may alias anything. Otherwise, the MEM can only alias
567 MEMs in the same alias set. This value is set in a
568 language-dependent manner in the front-end, and should not be
569 altered in the back-end. These set numbers are tested for zero,
570 and compared for equality; they have no other significance. In
571 some front-ends, these numbers may correspond in some way to types,
572 or other language-level entities, but they need not, and the
573 back-end makes no such assumptions. */
574 #define MEM_ALIAS_SET(RTX) (XINT (RTX, 1))
576 /* For a LABEL_REF, 1 means that this reference is to a label outside the
577 loop containing the reference. */
578 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
580 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
581 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
582 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
584 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
585 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
587 /* For a REG, 1 means the register is used only in an exit test of a loop. */
588 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
590 /* During sched, for an insn, 1 means that the insn must be scheduled together
591 with the preceding insn. */
592 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
594 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
595 cost of the dependence link. The cost of executing an instruction
596 may vary based on how the results are used. LINK_COST_ZERO is 1 when
597 the cost through the link varies and is unchanged (i.e., the link has
598 zero additional cost). LINK_COST_FREE is 1 when the cost through the
599 link is zero (i.e., the link makes the cost free). In other cases,
600 the adjustment to the cost is recomputed each time it is needed. */
601 #define LINK_COST_ZERO(X) ((X)->jump)
602 #define LINK_COST_FREE(X) ((X)->call)
604 /* For a SET rtx, SET_DEST is the place that is set
605 and SET_SRC is the value it is set to. */
606 #define SET_DEST(RTX) ((RTX)->fld[0].rtx)
607 #define SET_SRC(RTX) ((RTX)->fld[1].rtx)
609 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
610 #define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx)
611 #define TRAP_CODE(RTX) (RTX)->fld[1].rtx
613 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
614 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
616 /* Flag in a SYMBOL_REF for machine-specific purposes. */
617 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
619 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
620 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
622 /* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn
623 of the function that is not involved in copying parameters to
624 pseudo-registers. FIRST_PARM_INSN is the very first insn of
625 the function, including the parameter copying.
626 We keep this around in case we must splice
627 this function into the assembly code at the end of the file.
628 FIRST_LABELNO is the first label number used by the function (inclusive).
629 LAST_LABELNO is the last label used by the function (exclusive).
630 MAX_REGNUM is the largest pseudo-register used by that function.
631 FUNCTION_ARGS_SIZE is the size of the argument block in the stack.
632 POPS_ARGS is the number of bytes of input arguments popped by the function
633 STACK_SLOT_LIST is the list of stack slots.
634 FORCED_LABELS is the list of labels whose address was taken.
635 FUNCTION_FLAGS are where single-bit flags are saved.
636 OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list.
637 ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values
638 for the function arguments.
639 ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the
641 INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and
642 INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays.
644 We want this to lay down like an INSN. The PREV_INSN field
645 is always NULL. The NEXT_INSN field always points to the
646 first function insn of the function being squirreled away. */
648 #define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx)
649 #define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx)
650 #define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint)
651 #define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint)
652 #define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint)
653 #define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint)
654 #define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint)
655 #define POPS_ARGS(RTX) ((RTX)->fld[9].rtint)
656 #define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx)
657 #define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx)
658 #define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint)
659 #define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint)
660 #define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec)
661 #define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx)
662 #define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec)
663 #define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr)
664 #define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr)
665 #define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec)
667 /* In FUNCTION_FLAGS we save some variables computed when emitting the code
668 for the function and which must be `or'ed into the current flag values when
669 insns from that function are being inlined. */
671 /* These ought to be an enum, but non-ANSI compilers don't like that. */
672 #define FUNCTION_FLAGS_CALLS_ALLOCA 01
673 #define FUNCTION_FLAGS_CALLS_SETJMP 02
674 #define FUNCTION_FLAGS_RETURNS_STRUCT 04
675 #define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010
676 #define FUNCTION_FLAGS_NEEDS_CONTEXT 020
677 #define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040
678 #define FUNCTION_FLAGS_RETURNS_POINTER 0100
679 #define FUNCTION_FLAGS_USES_CONST_POOL 0200
680 #define FUNCTION_FLAGS_CALLS_LONGJMP 0400
681 #define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000
683 /* Define a macro to look for REG_INC notes,
684 but save time on machines where they never exist. */
686 /* Don't continue this line--convex cc version 4.1 would lose. */
687 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
688 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
690 #define FIND_REG_INC_NOTE(insn, reg) 0
693 /* Indicate whether the machine has any sort of auto increment addressing.
694 If not, we can avoid checking for REG_INC notes. */
696 /* Don't continue this line--convex cc version 4.1 would lose. */
697 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
701 /* Accessors for RANGE_INFO. */
702 /* For RANGE_{START,END} notes return the RANGE_START note. */
703 #define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0))
705 /* For RANGE_{START,END} notes return the RANGE_START note. */
706 #define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1))
708 /* For RANGE_{START,END} notes, return the vector containing the registers used
710 #define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2))
711 #define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N))
712 #define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2))
714 /* For RANGE_{START,END} notes, the number of calls within the range. */
715 #define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3))
717 /* For RANGE_{START,END} notes, the number of insns within the range. */
718 #define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4))
720 /* For RANGE_{START,END} notes, a unique # to identify this range. */
721 #define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5))
723 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
724 #define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6))
726 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
727 #define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7))
729 /* For RANGE_{START,END} notes, the loop depth the range is in. */
730 #define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8))
732 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
734 #define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9))
736 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
738 #define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10))
740 /* For RANGE_START notes, the marker # of the start of the range. */
741 #define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11))
743 /* For RANGE_START notes, the marker # of the end of the range. */
744 #define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12))
746 /* Original pseudo register # for a live range note. */
747 #define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0))
749 /* Pseudo register # original register is copied into or -1. */
750 #define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1))
752 /* How many times a register in a live range note was referenced. */
753 #define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2))
755 /* How many times a register in a live range note was set. */
756 #define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3))
758 /* How many times a register in a live range note died. */
759 #define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4))
761 /* Whether the original value is needed to be copied into the range register at
762 the start of the range. */
763 #define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5))
765 /* # of insns the register copy is live over. */
766 #define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6))
768 /* # of calls the register copy is live over. */
769 #define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7))
771 /* DECL_NODE pointer of the declaration if the register is a user defined
773 #define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8))
775 /* BLOCK_NODE pointer to the block the variable is declared in if the
776 register is a user defined variable. */
777 #define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9))
779 /* EXPR_LIST of the distinct ranges a variable is in. */
780 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
782 /* Block a variable is declared in. */
783 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
785 /* # of distinct ranges a variable is in. */
786 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
788 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
789 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
791 /* For a NOTE_INSN_LIVE note, the original basic block number. */
792 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
794 /* Generally useful functions. */
796 /* The following functions accept a wide integer argument. Rather than
797 having to cast on every function call, we use a macro instead, that is
798 defined here and in tree.h. */
801 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
802 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
804 extern int exact_log2_wide PROTO((unsigned HOST_WIDE_INT));
805 extern int floor_log2_wide PROTO((unsigned HOST_WIDE_INT));
808 extern int ceil_log2 PROTO((unsigned HOST_WIDE_INT));
810 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
812 #define plus_constant_for_output(X,C) \
813 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
816 extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT));
817 extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT));
818 extern void optimize_save_area_alloca PROTO((rtx));
820 extern rtx gen_rtx PVPROTO((enum rtx_code,
821 enum machine_mode, ...));
822 extern rtvec gen_rtvec PVPROTO((int, ...));
825 extern rtx read_rtx PROTO((FILE *));
829 /* At present, don't prototype xrealloc, since all of the callers don't
830 cast their pointers to char *, and all of the xrealloc's don't use
832 extern char *xmalloc PROTO((size_t));
833 extern char *xcalloc PROTO((size_t, size_t));
834 extern char *xrealloc PROTO((void *, size_t));
836 extern char *xmalloc ();
837 extern char *xcalloc ();
838 extern char *xrealloc ();
841 extern char *oballoc PROTO((int));
842 extern char *permalloc PROTO((int));
843 extern rtx rtx_alloc PROTO((RTX_CODE));
844 extern rtvec rtvec_alloc PROTO((int));
845 extern rtx copy_rtx PROTO((rtx));
846 extern rtx copy_rtx_if_shared PROTO((rtx));
847 extern rtx copy_most_rtx PROTO((rtx, rtx));
848 extern rtvec gen_rtvec_v PROTO((int, rtx *));
849 extern rtvec gen_rtvec_vv PROTO((int, rtunion *));
850 extern rtx gen_reg_rtx PROTO((enum machine_mode));
851 extern rtx gen_label_rtx PROTO((void));
852 extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int,
853 int, int, rtx, rtx, int, int,
855 rtvec, char *, char *, rtvec));
856 extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx));
857 extern rtx gen_lowpart PROTO((enum machine_mode, rtx));
858 extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx));
859 extern rtx gen_highpart PROTO((enum machine_mode, rtx));
860 extern rtx gen_realpart PROTO((enum machine_mode, rtx));
861 extern rtx gen_imagpart PROTO((enum machine_mode, rtx));
862 extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode));
863 extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode));
864 extern int subreg_lowpart_p PROTO((rtx));
865 extern rtx make_safe_from PROTO((rtx, rtx));
866 extern rtx convert_memory_address PROTO((enum machine_mode, rtx));
867 extern rtx memory_address PROTO((enum machine_mode, rtx));
868 extern rtx get_insns PROTO((void));
869 extern rtx get_last_insn PROTO((void));
870 extern rtx get_last_insn_anywhere PROTO((void));
871 extern void start_sequence PROTO((void));
872 extern void push_to_sequence PROTO((rtx));
873 extern void end_sequence PROTO((void));
874 extern rtx gen_sequence PROTO((void));
875 extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
876 extern rtx force_const_mem PROTO((enum machine_mode, rtx));
877 extern rtx force_reg PROTO((enum machine_mode, rtx));
878 extern rtx get_pool_constant PROTO((rtx));
879 extern enum machine_mode get_pool_mode PROTO((rtx));
880 extern int get_pool_offset PROTO((rtx));
881 extern rtx simplify_subtraction PROTO((rtx));
882 extern rtx assign_stack_local PROTO((enum machine_mode,
883 HOST_WIDE_INT, int));
884 extern rtx assign_stack_temp PROTO((enum machine_mode,
885 HOST_WIDE_INT, int));
886 extern rtx assign_temp PROTO((union tree_node *,
888 extern rtx protect_from_queue PROTO((rtx, int));
889 extern void emit_queue PROTO((void));
890 extern rtx emit_move_insn PROTO((rtx, rtx));
891 extern rtx emit_insn_before PROTO((rtx, rtx));
892 extern rtx emit_jump_insn_before PROTO((rtx, rtx));
893 extern rtx emit_call_insn_before PROTO((rtx, rtx));
894 extern rtx emit_barrier_before PROTO((rtx));
895 extern rtx emit_note_before PROTO((int, rtx));
896 extern rtx emit_insn_after PROTO((rtx, rtx));
897 extern rtx emit_jump_insn_after PROTO((rtx, rtx));
898 extern rtx emit_barrier_after PROTO((rtx));
899 extern rtx emit_label_after PROTO((rtx, rtx));
900 extern rtx emit_note_after PROTO((int, rtx));
901 extern rtx emit_line_note_after PROTO((char *, int, rtx));
902 extern rtx emit_insn PROTO((rtx));
903 extern rtx emit_insns PROTO((rtx));
904 extern rtx emit_insns_before PROTO((rtx, rtx));
905 extern rtx emit_insns_after PROTO((rtx, rtx));
906 extern rtx emit_jump_insn PROTO((rtx));
907 extern rtx emit_call_insn PROTO((rtx));
908 extern rtx emit_label PROTO((rtx));
909 extern rtx emit_barrier PROTO((void));
910 extern rtx emit_line_note PROTO((char *, int));
911 extern rtx emit_note PROTO((char *, int));
912 extern rtx emit_line_note_force PROTO((char *, int));
913 extern rtx make_insn_raw PROTO((rtx));
914 extern rtx previous_insn PROTO((rtx));
915 extern rtx next_insn PROTO((rtx));
916 extern rtx prev_nonnote_insn PROTO((rtx));
917 extern rtx next_nonnote_insn PROTO((rtx));
918 extern rtx prev_real_insn PROTO((rtx));
919 extern rtx next_real_insn PROTO((rtx));
920 extern rtx prev_active_insn PROTO((rtx));
921 extern rtx next_active_insn PROTO((rtx));
922 extern rtx prev_label PROTO((rtx));
923 extern rtx next_label PROTO((rtx));
924 extern rtx next_cc0_user PROTO((rtx));
925 extern rtx prev_cc0_setter PROTO((rtx));
926 extern rtx next_nondeleted_insn PROTO((rtx));
927 extern enum rtx_code reverse_condition PROTO((enum rtx_code));
928 extern enum rtx_code swap_condition PROTO((enum rtx_code));
929 extern enum rtx_code unsigned_condition PROTO((enum rtx_code));
930 extern enum rtx_code signed_condition PROTO((enum rtx_code));
931 extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode));
932 extern rtx squeeze_notes PROTO((rtx, rtx));
933 extern rtx delete_insn PROTO((rtx));
934 extern void delete_jump PROTO((rtx));
935 extern rtx get_label_before PROTO((rtx));
936 extern rtx get_label_after PROTO((rtx));
937 extern rtx follow_jumps PROTO((rtx));
938 extern rtx adj_offsettable_operand PROTO((rtx, int));
939 extern rtx try_split PROTO((rtx, rtx, int));
940 extern rtx split_insns PROTO((rtx, rtx));
941 extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode));
942 extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
943 extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx));
944 extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
945 extern rtx nonlocal_label_rtx_list PROTO((void));
946 extern rtx gen_move_insn PROTO((rtx, rtx));
947 extern rtx gen_jump PROTO((rtx));
948 extern rtx gen_beq PROTO((rtx));
949 extern rtx gen_bge PROTO((rtx));
950 extern rtx gen_ble PROTO((rtx));
951 extern rtx gen_mem_addressof PROTO((rtx, union tree_node *));
952 extern rtx eliminate_constant_term PROTO((rtx, rtx *));
953 extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int));
954 extern enum machine_mode choose_hard_reg_mode PROTO((int, int));
955 extern int rtx_varies_p PROTO((rtx));
956 extern int may_trap_p PROTO((rtx));
957 extern int side_effects_p PROTO((rtx));
958 extern int volatile_refs_p PROTO((rtx));
959 extern int volatile_insn_p PROTO((rtx));
960 extern void remove_note PROTO((rtx, rtx));
961 extern int refers_to_regno_p PROTO((int, int, rtx, rtx *));
962 extern int reg_overlap_mentioned_p PROTO((rtx, rtx));
964 /* Functions in rtlanal.c */
966 extern int rtx_unstable_p PROTO((rtx));
967 extern int rtx_varies_p PROTO((rtx));
968 extern int rtx_addr_varies_p PROTO((rtx));
969 extern HOST_WIDE_INT get_integer_term PROTO((rtx));
970 extern rtx get_related_value PROTO((rtx));
971 extern int reg_mentioned_p PROTO((rtx, rtx));
972 extern int reg_referenced_p PROTO((rtx, rtx));
973 extern int reg_used_between_p PROTO((rtx, rtx, rtx));
974 extern int reg_referenced_between_p PROTO((rtx, rtx, rtx));
975 extern int reg_set_between_p PROTO((rtx, rtx, rtx));
976 extern int modified_between_p PROTO((rtx, rtx, rtx));
977 extern int no_labels_between_p PROTO((rtx, rtx));
978 extern int modified_in_p PROTO((rtx, rtx));
979 extern int reg_set_p PROTO((rtx, rtx));
980 extern rtx single_set PROTO((rtx));
981 extern rtx find_last_value PROTO((rtx, rtx *, rtx));
982 extern int refers_to_regno_p PROTO((int, int, rtx, rtx *));
983 extern int reg_overlap_mentioned_p PROTO((rtx, rtx));
984 extern rtx find_use_as_address PROTO((rtx, rtx, HOST_WIDE_INT));
985 extern void note_stores PROTO((rtx, void (*)()));
986 extern rtx reg_set_last PROTO((rtx, rtx));
987 extern int rtx_equal_p PROTO((rtx, rtx));
988 extern int dead_or_set_p PROTO((rtx, rtx));
989 extern int dead_or_set_regno_p PROTO((rtx, int));
990 extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx));
991 extern rtx find_regno_note PROTO((rtx, enum reg_note, int));
992 extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx));
993 extern int find_regno_fusage PROTO((rtx, enum rtx_code, int));
994 extern void remove_note PROTO((rtx, rtx));
995 extern int side_effects_p PROTO((rtx));
996 extern int volatile_refs_p PROTO((rtx));
997 extern int volatile_insn_p PROTO((rtx));
998 extern int may_trap_p PROTO((rtx));
999 extern int inequality_comparison_p PROTO((rtx));
1000 extern rtx replace_rtx PROTO((rtx, rtx, rtx));
1001 extern rtx replace_regs PROTO((rtx, rtx *, int, int));
1002 extern int computed_jump_p PROTO((rtx));
1004 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1005 Always at least 3, since the combiner could put that many togetherm
1006 and we want this to remain correct for all the remaining passes. */
1008 extern int max_parallel;
1010 extern int asm_noperands PROTO((rtx));
1011 extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **, char **, enum machine_mode *));
1013 extern enum reg_class reg_preferred_class PROTO((int));
1014 extern enum reg_class reg_alternate_class PROTO((int));
1016 extern rtx get_first_nonparm_insn PROTO((void));
1018 /* Standard pieces of rtx, to be substituted directly into things. */
1019 #define pc_rtx (&global_rtl.pc_val)
1020 #define cc0_rtx (&global_rtl.cc0_val)
1022 #define MAX_SAVED_CONST_INT 64
1023 extern struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1025 #define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT])
1026 #define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1])
1027 #define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2])
1028 #define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1])
1029 extern rtx const_true_rtx;
1031 extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1033 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1034 same as VOIDmode. */
1036 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1038 /* Likewise, for the constants 1 and 2. */
1040 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1041 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1043 extern struct _global_rtl
1045 struct rtx_def pc_val, cc0_val;
1046 struct rtx_def stack_pointer_val, frame_pointer_val;
1047 struct rtx_def hard_frame_pointer_val;
1048 struct rtx_def arg_pointer_val;
1049 struct rtx_def virtual_incoming_args_val;
1050 struct rtx_def virtual_stack_vars_val;
1051 struct rtx_def virtual_stack_dynamic_val;
1052 struct rtx_def virtual_outgoing_args_val;
1055 /* All references to certain hard regs, except those created
1056 by allocating pseudo regs into them (when that's possible),
1057 go through these unique rtx objects. */
1058 #define stack_pointer_rtx (&global_rtl.stack_pointer_val)
1059 #define frame_pointer_rtx (&global_rtl.frame_pointer_val)
1061 extern rtx pic_offset_table_rtx;
1062 extern rtx struct_value_rtx;
1063 extern rtx struct_value_incoming_rtx;
1064 extern rtx static_chain_rtx;
1065 extern rtx static_chain_incoming_rtx;
1068 /* Include the RTL generation functions. */
1074 /* There are some RTL codes that require special attention; the
1075 generation functions included above do the raw handling. If you
1076 add to this list, modify special_rtx in gengenrtl.c as well. You
1077 should also modify gen_rtx to use the special function. */
1079 extern rtx gen_rtx_CONST_INT PROTO((enum machine_mode, HOST_WIDE_INT));
1080 extern rtx gen_rtx_REG PROTO((enum machine_mode, int));
1081 extern rtx gen_rtx_MEM PROTO((enum machine_mode, rtx));
1083 /* We need the cast here to ensure that we get the same result both with
1084 and without prototypes. */
1085 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1088 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1089 is used to represent the frame pointer. This is because the
1090 hard frame pointer and the automatic variables are separated by an amount
1091 that cannot be determined until after register allocation. We can assume
1092 that in this case ELIMINABLE_REGS will be defined, one action of which
1093 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1094 #ifndef HARD_FRAME_POINTER_REGNUM
1095 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1098 /* For register elimination to work properly these hard_frame_pointer_rtx,
1099 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1100 the same register. */
1101 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1102 #define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val)
1104 #define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1107 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1108 #define arg_pointer_rtx (&global_rtl.frame_pointer_val)
1110 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1111 #define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1113 #define arg_pointer_rtx (&global_rtl.arg_pointer_val)
1117 /* Virtual registers are used during RTL generation to refer to locations into
1118 the stack frame when the actual location isn't known until RTL generation
1119 is complete. The routine instantiate_virtual_regs replaces these with
1120 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1123 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1125 /* This points to the first word of the incoming arguments passed on the stack,
1126 either by the caller or by the callee when pretending it was passed by the
1129 #define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val)
1131 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1133 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1134 variable on the stack. Otherwise, it points to the first variable on
1137 #define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val)
1139 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1141 /* This points to the location of dynamically-allocated memory on the stack
1142 immediately after the stack pointer has been adjusted by the amount
1145 #define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val)
1147 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1149 /* This points to the location in the stack at which outgoing arguments should
1150 be written when the stack is pre-pushed (arguments pushed using push
1151 insns always use sp). */
1153 #define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val)
1155 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1157 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 3)
1159 extern rtx find_next_ref PROTO((rtx, rtx));
1160 extern rtx *find_single_use PROTO((rtx, rtx, rtx *));
1162 extern rtx output_constant_def PROTO((union tree_node *));
1163 extern rtx immed_real_const PROTO((union tree_node *));
1164 extern union tree_node *make_tree PROTO((union tree_node *, rtx));
1166 /* Abort routines */
1167 extern void fatal_insn_not_found PROTO((rtx));
1168 extern void fatal_insn PROTO((char *, rtx));
1170 /* Define a default value for STORE_FLAG_VALUE. */
1172 #ifndef STORE_FLAG_VALUE
1173 #define STORE_FLAG_VALUE 1
1176 /* Nonzero after end of reload pass.
1177 Set to 1 or 0 by toplev.c. */
1179 extern int reload_completed;
1181 /* Set to 1 while reload_as_needed is operating.
1182 Required by some machines to handle any generated moves differently. */
1184 extern int reload_in_progress;
1186 /* If this is nonzero, we do not bother generating VOLATILE
1187 around volatile memory references, and we are willing to
1188 output indirect addresses. If cse is to follow, we reject
1189 indirect addresses so a useful potential cse is generated;
1190 if it is used only once, instruction combination will produce
1191 the same indirect address eventually. */
1192 extern int cse_not_expected;
1194 /* Indexed by pseudo register number, gives the rtx for that pseudo.
1195 Allocated in parallel with regno_pointer_flag. */
1196 extern rtx *regno_reg_rtx;
1198 /* Vector indexed by regno; contain the alignment in bytes and type
1199 pointed to for a register that contains a pointer, if known. */
1200 extern char *regno_pointer_align;
1201 #define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO]
1203 /* Translates rtx code to tree code, for those codes needed by
1204 REAL_ARITHMETIC. The function returns an int because the caller may not
1205 know what `enum tree_code' means. */
1207 extern int rtx_to_tree_code PROTO((enum rtx_code));
1210 extern int reg_set_p PROTO ((rtx, rtx));
1211 extern int reg_mentioned_p PROTO ((rtx, rtx));
1212 extern int reg_referenced_p PROTO ((rtx, rtx));
1213 extern int reg_used_between_p PROTO ((rtx, rtx, rtx));
1214 extern int reg_set_p PROTO ((rtx, rtx));
1215 extern int reg_referenced_between_p PROTO ((rtx, rtx, rtx));
1216 extern int reg_set_between_p PROTO ((rtx, rtx, rtx));
1217 extern int rtx_unstable_p PROTO ((rtx));
1218 extern int rtx_addr_varies_p PROTO ((rtx));
1219 extern int rtx_equal_p PROTO ((rtx, rtx));
1220 extern int inequality_comparisons_p PROTO ((rtx));
1221 extern int dead_or_set_p PROTO ((rtx, rtx));
1222 extern int dead_or_set_regno_p PROTO ((rtx, int));
1223 extern int no_labels_between_p PROTO ((rtx, rtx));
1224 extern int modified_between_p PROTO ((rtx, rtx, rtx));
1225 extern int modified_in_p PROTO ((rtx, rtx));
1228 extern void obfree PROTO ((char *));
1230 extern void gcc_obstack_init PROTO ((struct obstack *));
1231 extern void pop_obstacks PROTO ((void));
1232 extern void push_obstacks PROTO ((struct obstack *,
1235 extern int read_skip_spaces PROTO ((FILE *));
1239 struct cse_basic_block_data;
1240 extern int rtx_cost PROTO ((rtx, enum rtx_code));
1241 extern void delete_trivially_dead_insns PROTO ((rtx, int));
1243 extern int cse_main PROTO ((rtx, int, int, FILE *));
1245 extern void cse_end_of_basic_block PROTO ((rtx,
1246 struct cse_basic_block_data *,
1250 extern int comparison_dominates_p PROTO ((enum rtx_code, enum rtx_code));
1251 extern int condjump_p PROTO ((rtx));
1252 extern int simplejump_p PROTO ((rtx));
1253 extern int sets_cc0_p PROTO ((rtx));
1254 extern int invert_jump PROTO ((rtx, rtx));
1255 extern int rtx_renumbered_equal_p PROTO ((rtx, rtx));
1256 extern int true_regnum PROTO ((rtx));
1257 extern int redirect_jump PROTO ((rtx, rtx));
1258 extern void jump_optimize PROTO ((rtx, int, int, int));
1259 extern void thread_jumps PROTO ((rtx, int, int));
1260 extern int redirect_exp PROTO ((rtx *, rtx, rtx, rtx));
1261 extern int rtx_equal_for_thread_p PROTO ((rtx, rtx, rtx));
1262 extern int invert_exp PROTO ((rtx, rtx));
1263 extern int can_reverse_comparison_p PROTO ((rtx, rtx));
1264 extern void delete_for_peephole PROTO ((rtx, rtx));
1265 extern int condjump_in_parallel_p PROTO ((rtx));
1267 /* Flags for jump_optimize() */
1268 #define JUMP_CROSS_JUMP 1
1269 #define JUMP_NOOP_MOVES 1
1270 #define JUMP_AFTER_REGSCAN 1
1272 /* In emit-rtl.c. */
1273 extern int max_reg_num PROTO ((void));
1274 extern int max_label_num PROTO ((void));
1275 extern int get_first_label_num PROTO ((void));
1276 extern void delete_insns_since PROTO ((rtx));
1277 extern void mark_reg_pointer PROTO ((rtx, int));
1278 extern void mark_user_reg PROTO ((rtx));
1279 extern void reset_used_flags PROTO ((rtx));
1280 extern void reorder_insns PROTO ((rtx, rtx, rtx));
1281 extern int get_max_uid PROTO ((void));
1282 extern int in_sequence_p PROTO ((void));
1283 extern void force_next_line_note PROTO ((void));
1284 extern void init_emit PROTO ((void));
1285 extern void init_emit_once PROTO ((int));
1286 extern void push_topmost_sequence PROTO ((void));
1287 extern void pop_topmost_sequence PROTO ((void));
1288 extern int subreg_realpart_p PROTO ((rtx));
1289 extern void reverse_comparison PROTO ((rtx));
1290 extern void set_new_first_and_last_insn PROTO ((rtx, rtx));
1291 extern void set_new_first_and_last_label_num PROTO ((int, int));
1292 extern void unshare_all_rtl PROTO ((rtx));
1293 extern void set_last_insn PROTO ((rtx));
1294 extern void link_cc0_insns PROTO ((rtx));
1295 extern void add_insn PROTO ((rtx));
1296 extern void add_insn_before PROTO ((rtx, rtx));
1297 extern void add_insn_after PROTO ((rtx, rtx));
1298 extern void reorder_insns_with_line_notes PROTO ((rtx, rtx, rtx));
1299 extern void emit_insn_after_with_line_notes PROTO ((rtx, rtx, rtx));
1300 extern enum rtx_code classify_insn PROTO ((rtx));
1301 extern rtx emit PROTO ((rtx));
1302 /* Query and clear/ restore no_line_numbers. This is used by the
1303 switch / case handling in stmt.c to give proper line numbers in
1304 warnings about unreachable code. */
1305 int force_line_numbers PROTO((void));
1306 void restore_line_number_status PROTO((int old_value));
1308 /* In insn-emit.c */
1309 extern void add_clobbers PROTO ((rtx, int));
1312 extern void combine_instructions PROTO ((rtx, int));
1313 extern int extended_count PROTO ((rtx, enum machine_mode, int));
1314 extern rtx remove_death PROTO ((int, rtx));
1316 extern void dump_combine_stats PROTO ((FILE *));
1317 extern void dump_combine_total_stats PROTO ((FILE *));
1322 extern void schedule_insns PROTO ((FILE *));
1325 extern void fix_sched_param PROTO ((char *, char *));
1328 /* In print-rtl.c */
1329 extern void debug_rtx PROTO ((rtx));
1330 extern void debug_rtx_list PROTO ((rtx, int));
1331 extern rtx debug_rtx_find PROTO ((rtx, int));
1333 extern void print_rtl PROTO ((FILE *, rtx));
1334 extern void print_rtl_single PROTO ((FILE *, rtx));
1335 extern void print_inline_rtx PROTO ((FILE *, rtx, int));
1339 extern void init_loop PROTO ((void));
1341 extern void loop_optimize PROTO ((rtx, FILE *, int));
1343 extern void record_excess_regs PROTO ((rtx, rtx, rtx *));
1346 extern void reposition_prologue_and_epilogue_notes PROTO ((rtx));
1347 extern void thread_prologue_and_epilogue_insns PROTO ((rtx));
1348 extern void use_variable PROTO ((rtx));
1349 extern HOST_WIDE_INT get_frame_size PROTO ((void));
1350 extern void preserve_rtl_expr_result PROTO ((rtx));
1351 extern void mark_temp_addr_taken PROTO ((rtx));
1352 extern void update_temp_slot_address PROTO ((rtx, rtx));
1353 extern void use_variable_after PROTO ((rtx, rtx));
1354 extern void purge_addressof PROTO ((rtx));
1357 extern int operands_match_p PROTO ((rtx, rtx));
1358 extern int safe_from_earlyclobber PROTO ((rtx, rtx));
1359 extern int strict_memory_address_p PROTO ((enum machine_mode, rtx));
1362 extern int memory_address_p PROTO ((enum machine_mode, rtx));
1363 extern int constrain_operands PROTO ((int, int));
1364 extern int mode_dependent_address_p PROTO ((rtx));
1365 extern void init_recog_no_volatile PROTO ((void));
1366 extern int offsettable_memref_p PROTO ((rtx));
1367 extern int offsettable_nonstrict_memref_p PROTO ((rtx));
1368 extern int reg_fits_class_p PROTO ((rtx, register enum reg_class,
1369 int, enum machine_mode));
1370 extern int check_asm_operands PROTO ((rtx));
1371 extern int address_operand PROTO ((rtx, enum machine_mode));
1372 extern int const_int_operand PROTO ((rtx, enum machine_mode));
1373 extern int const_double_operand PROTO ((rtx, enum machine_mode));
1374 extern int general_operand PROTO ((rtx, enum machine_mode));
1375 extern int immediate_operand PROTO ((rtx, enum machine_mode));
1376 extern int nonimmediate_operand PROTO ((rtx, enum machine_mode));
1377 extern int memory_operand PROTO ((rtx, enum machine_mode));
1378 extern int nonmemory_operand PROTO ((rtx, enum machine_mode));
1379 extern int push_operand PROTO ((rtx, enum machine_mode));
1380 extern int register_operand PROTO ((rtx, enum machine_mode));
1381 extern int scratch_operand PROTO ((rtx, enum machine_mode));
1382 extern int indirect_operand PROTO ((rtx, enum machine_mode));
1383 extern int mode_independent_operand PROTO ((rtx, enum machine_mode));
1384 extern int comparison_operator PROTO ((rtx, enum machine_mode));
1385 extern void init_recog_no_volatile PROTO ((void));
1386 extern void init_recog PROTO ((void));
1387 extern int validate_replace_rtx PROTO ((rtx, rtx, rtx));
1388 extern int offsettable_address_p PROTO ((int, enum machine_mode, rtx));
1389 extern int next_insn_tests_no_inequality PROTO ((rtx));
1390 extern int recog_memoized PROTO ((rtx));
1391 extern int validate_change PROTO ((rtx, rtx *, rtx, int));
1392 extern int apply_change_group PROTO ((void));
1393 extern void cancel_changes PROTO ((int));
1394 extern int num_validated_changes PROTO ((void));
1396 /* In insn-recog.c */
1397 extern int recog PROTO ((rtx, rtx, int *));
1400 extern void expand_null_return PROTO((void));
1401 extern void emit_jump PROTO ((rtx));
1402 extern int preserve_subexpressions_p PROTO ((void));
1405 extern void init_expr_once PROTO ((void));
1409 extern void stupid_life_analysis PROTO ((rtx, int, FILE *));
1413 extern void allocate_for_life_analysis PROTO ((void));
1414 extern void recompute_reg_usage PROTO ((rtx));
1416 extern void dump_flow_info PROTO ((FILE *));
1420 extern void init_expmed PROTO ((void));
1421 extern void expand_inc PROTO ((rtx, rtx));
1422 extern void expand_dec PROTO ((rtx, rtx));
1423 extern rtx expand_mult_highpart PROTO ((enum machine_mode, rtx,
1424 unsigned HOST_WIDE_INT, rtx,
1429 extern void gcse_main PROTO ((rtx, FILE *));
1433 extern void mark_elimination PROTO ((int, int));
1435 extern int global_alloc PROTO ((FILE *));
1436 extern void dump_global_regs PROTO ((FILE *));
1439 extern void retry_global_alloc PROTO ((int, HARD_REG_SET));
1443 extern int reg_classes_intersect_p PROTO ((enum reg_class, enum reg_class));
1444 extern int reg_class_subset_p PROTO ((enum reg_class, enum reg_class));
1445 extern void globalize_reg PROTO ((int));
1446 extern void init_regs PROTO ((void));
1447 extern void init_reg_sets PROTO ((void));
1448 extern void regset_release_memory PROTO ((void));
1449 extern void regclass_init PROTO ((void));
1450 extern void regclass PROTO ((rtx, int));
1451 extern void reg_scan PROTO ((rtx, int, int));
1452 extern void reg_scan_update PROTO ((rtx, rtx, int));
1453 extern void fix_register PROTO ((char *, int, int));
1457 extern void regmove_optimize PROTO ((rtx, int, FILE *));
1462 extern void dbr_schedule PROTO ((rtx, FILE *));
1466 extern void init_optabs PROTO ((void));
1468 /* In local-alloc.c */
1470 extern void dump_local_alloc PROTO ((FILE *));
1472 extern void local_alloc PROTO ((void));
1475 extern void reload_cse_regs PROTO ((rtx));
1476 extern void init_reload PROTO ((void));
1477 extern void mark_home_live PROTO ((int));
1479 extern int reload PROTO ((rtx, int, FILE *));
1482 /* In caller-save.c */
1483 extern void init_caller_save PROTO ((void));
1486 extern void init_branch_prob PROTO ((char *));
1488 extern void branch_prob PROTO ((rtx, FILE *));
1489 extern void end_branch_prob PROTO ((FILE *));
1491 extern void output_func_start_profiler PROTO ((void));
1493 /* In reg-stack.c */
1495 extern void reg_to_stack PROTO ((rtx, FILE *));
1497 extern int stack_regs_mentioned_p PROTO ((rtx));
1499 /* In fold-const.c */
1500 extern int add_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1501 HOST_WIDE_INT, HOST_WIDE_INT,
1502 HOST_WIDE_INT *, HOST_WIDE_INT *));
1503 extern int neg_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1504 HOST_WIDE_INT *, HOST_WIDE_INT *));
1505 extern int mul_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1506 HOST_WIDE_INT, HOST_WIDE_INT,
1507 HOST_WIDE_INT *, HOST_WIDE_INT *));
1508 extern void lshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1509 HOST_WIDE_INT, int, HOST_WIDE_INT *,
1510 HOST_WIDE_INT *, int));
1511 extern void rshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1513 HOST_WIDE_INT *, HOST_WIDE_INT *, int));
1514 extern void lrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1515 HOST_WIDE_INT, int, HOST_WIDE_INT *,
1517 extern void rrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
1518 HOST_WIDE_INT, int, HOST_WIDE_INT *,
1522 /* Emit library call. */
1523 extern void emit_library_call PVPROTO ((rtx, int, enum machine_mode,
1525 extern rtx emit_library_call_value PVPROTO((rtx, rtx, int,
1530 extern int set_dominates_use PROTO ((int, int, int, rtx, rtx));
1533 extern void bss_section PROTO ((void));
1534 extern int in_data_section PROTO ((void));
1535 extern int supports_one_only PROTO ((void));
1538 extern void init_rtl PROTO ((void));
1539 extern void rtx_free PROTO ((rtx));
1542 extern int true_dependence PROTO ((rtx, enum machine_mode, rtx,
1544 extern int read_dependence PROTO ((rtx, rtx));
1545 extern int anti_dependence PROTO ((rtx, rtx));
1546 extern int output_dependence PROTO ((rtx, rtx));
1547 extern void init_alias_once PROTO ((void));
1548 extern void init_alias_analysis PROTO ((void));
1549 extern void end_alias_analysis PROTO ((void));
1551 extern void record_base_value PROTO ((int, rtx, int));