1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 91-98, 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
26 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
27 #undef FLOAT /* Likewise. */
28 #undef ABS /* Likewise. */
29 #undef PC /* Likewise. */
35 /* Register Transfer Language EXPRESSIONS CODES */
37 #define RTX_CODE enum rtx_code
40 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
41 #include "rtl.def" /* rtl expressions are documented here */
44 LAST_AND_UNUSED_RTX_CODE
}; /* A convenient way to get a value for
46 Assumes default enum value assignment. */
48 #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
49 /* The cast here, saves many elsewhere. */
51 extern 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
;
94 struct basic_block_def
*bb
;
97 /* RTL expression ("rtx"). */
99 typedef struct rtx_def
101 #ifdef ONLY_INT_FIELDS
102 #ifdef CODE_FIELD_BUG
103 unsigned int code
: 16;
108 /* The kind of expression this is. */
109 enum rtx_code code
: 16;
111 /* The kind of value the expression has. */
112 #ifdef ONLY_INT_FIELDS
115 enum machine_mode mode
: 8;
117 /* 1 in an INSN if it can alter flow of control
118 within this function. Not yet used! */
119 unsigned int jump
: 1;
120 /* 1 in an INSN if it can call another function. Not yet used! */
121 unsigned int call
: 1;
122 /* 1 in a MEM or REG if value of this expression will never change
123 during the current function, even though it is not
125 1 in a SUBREG if it is from a promoted variable that is unsigned.
126 1 in a SYMBOL_REF if it addresses something in the per-function
128 1 in a CALL_INSN if it is a const call.
129 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
130 reorg until end of compilation; cleared before used. */
131 unsigned int unchanging
: 1;
132 /* 1 in a MEM expression if contents of memory are volatile.
133 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
135 1 in a REG expression if corresponds to a variable declared by the user.
136 0 for an internally generated temporary.
137 In a SYMBOL_REF, this flag is used for machine-specific purposes.
138 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
139 unsigned int volatil
: 1;
140 /* 1 in a MEM referring to a field of an aggregate.
141 0 if the MEM was a variable or the result of a * operator in C;
142 1 if it was the result of a . or -> operator (on a struct) in C.
143 1 in a REG if the register is used only in exit code a loop.
144 1 in a SUBREG expression if was generated from a variable with a
146 1 in a CODE_LABEL if the label is used for nonlocal gotos
147 and must not be deleted even if its count is zero.
148 1 in a LABEL_REF if this is a reference to a label outside the
150 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
151 together with the preceding insn. Valid only within sched.
152 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
153 from the target of a branch. Valid from reorg until end of compilation;
154 cleared before used. */
155 unsigned int in_struct
: 1;
156 /* 1 if this rtx is used. This is used for copying shared structure.
157 See `unshare_all_rtl'.
158 In a REG, this is not needed for that purpose, and used instead
159 in `leaf_renumber_regs_insn'.
160 In a SYMBOL_REF, means that emit_library_call
161 has used it as the function. */
162 unsigned int used
: 1;
163 /* Nonzero if this rtx came from procedure integration.
164 In a REG, nonzero means this reg refers to the return value
165 of the current function. */
166 unsigned integrated
: 1;
167 /* 1 in an INSN or a SET if this rtx is related to the call frame,
168 either changing how we compute the frame address or saving and
169 restoring registers in the prologue and epilogue.
170 1 in a MEM if the MEM refers to a scalar, rather than a member of
172 unsigned frame_related
: 1;
173 /* The first element of the operands of this rtx.
174 The number of operands and their types are controlled
175 by the `code' field, according to rtl.def. */
179 #define NULL_RTX (rtx) 0
181 /* Define macros to access the `code' field of the rtx. */
183 #ifdef SHORT_ENUM_BUG
184 #define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
185 #define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
187 #define GET_CODE(RTX) ((RTX)->code)
188 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
191 #define GET_MODE(RTX) ((RTX)->mode)
192 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
194 #define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
195 #define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
196 #define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
198 /* RTL vector. These appear inside RTX's when there is a need
199 for a variable number of things. The principle use is inside
200 PARALLEL expressions. */
202 typedef struct rtvec_def
{
203 int num_elem
; /* number of elements */
207 #define NULL_RTVEC (rtvec) 0
209 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
210 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
212 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx)
214 /* 1 if X is a REG. */
216 #define REG_P(X) (GET_CODE (X) == REG)
218 /* 1 if X is a constant value that is an integer. */
220 #define CONSTANT_P(X) \
221 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
222 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
223 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
224 || GET_CODE (X) == CONSTANT_P_RTX)
226 /* General accessor macros for accessing the fields of an rtx. */
228 #define XEXP(RTX, N) ((RTX)->fld[N].rtx)
229 #define XINT(RTX, N) ((RTX)->fld[N].rtint)
230 #define XWINT(RTX, N) ((RTX)->fld[N].rtwint)
231 #define XSTR(RTX, N) ((RTX)->fld[N].rtstr)
232 #define XVEC(RTX, N) ((RTX)->fld[N].rtvec)
233 #define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem)
234 #define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx)
235 #define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit)
236 #define XTREE(RTX, N) ((RTX)->fld[N].rttree)
239 /* ACCESS MACROS for particular fields of insns. */
241 /* Holds a unique number for each insn.
242 These are not necessarily sequentially increasing. */
243 #define INSN_UID(INSN) ((INSN)->fld[0].rtint)
245 /* Chain insns together in sequence. */
246 #define PREV_INSN(INSN) ((INSN)->fld[1].rtx)
247 #define NEXT_INSN(INSN) ((INSN)->fld[2].rtx)
249 /* The body of an insn. */
250 #define PATTERN(INSN) ((INSN)->fld[3].rtx)
252 /* Code number of instruction, from when it was recognized.
253 -1 means this instruction has not been recognized yet. */
254 #define INSN_CODE(INSN) ((INSN)->fld[4].rtint)
256 /* Set up in flow.c; empty before then.
257 Holds a chain of INSN_LIST rtx's whose first operands point at
258 previous insns with direct data-flow connections to this one.
259 That means that those insns set variables whose next use is in this insn.
260 They are always in the same basic block as this insn. */
261 #define LOG_LINKS(INSN) ((INSN)->fld[5].rtx)
263 /* 1 if insn has been deleted. */
264 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
266 /* 1 if insn is a call to a const function. */
267 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
269 /* 1 if insn is a branch that should not unconditionally execute its
270 delay slots, i.e., it is an annulled branch. */
271 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
273 /* 1 if insn is in a delay slot and is from the target of the branch. If
274 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
275 executed if the branch is taken. For annulled branches with this bit
276 clear, the insn should be executed only if the branch is not taken. */
277 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
279 /* Holds a list of notes on what this insn does to various REGs.
280 It is a chain of EXPR_LIST rtx's, where the second operand
281 is the chain pointer and the first operand is the REG being described.
282 The mode field of the EXPR_LIST contains not a real machine mode
283 but a value that says what this note says about the REG:
284 REG_DEAD means that the value in REG dies in this insn (i.e., it is
285 not needed past this insn). If REG is set in this insn, the REG_DEAD
286 note may, but need not, be omitted.
287 REG_INC means that the REG is autoincremented or autodecremented.
288 REG_EQUIV describes the insn as a whole; it says that the insn
289 sets a register to a constant value or to be equivalent to a memory
290 address. If the register is spilled to the stack then the constant
291 value should be substituted for it. The contents of the REG_EQUIV
292 is the constant value or memory address, which may be different
293 from the source of the SET although it has the same value. A
294 REG_EQUIV note may also appear on an insn which copies a register
295 parameter to a pseudo-register, if there is a memory address which
296 could be used to hold that pseudo-register throughout the function.
297 REG_EQUAL is like REG_EQUIV except that the destination
298 is only momentarily equal to the specified rtx. Therefore, it
299 cannot be used for substitution; but it can be used for cse.
300 REG_RETVAL means that this insn copies the return-value of
301 a library call out of the hard reg for return values. This note
302 is actually an INSN_LIST and it points to the first insn involved
303 in setting up arguments for the call. flow.c uses this to delete
304 the entire library call when its result is dead.
305 REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
306 of the library call and points at the one that has the REG_RETVAL.
307 REG_WAS_0 says that the register set in this insn held 0 before the insn.
308 The contents of the note is the insn that stored the 0.
309 If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
310 The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
311 REG_NONNEG means that the register is always nonnegative during
312 the containing loop. This is used in branches so that decrement and
313 branch instructions terminating on zero can be matched. There must be
314 an insn pattern in the md file named `decrement_and_branch_until_zero'
315 or else this will never be added to any instructions.
316 REG_NO_CONFLICT means there is no conflict *after this insn*
317 between the register in the note and the destination of this insn.
318 REG_UNUSED identifies a register set in this insn and never used.
319 REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
320 CC0, respectively. Normally, these are required to be consecutive insns,
321 but we permit putting a cc0-setting insn in the delay slot of a branch
322 as long as only one copy of the insn exists. In that case, these notes
323 point from one to the other to allow code generation to determine what
324 any require information and to properly update CC_STATUS.
325 REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
326 say that the CODE_LABEL contained in the REG_LABEL note is used
328 REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
329 dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
330 (write after write) dependencies. Data dependencies, which are the only
331 type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
332 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
333 -fbranch-probabilities is given. It has an integer value. For jumps,
334 it is the probability that this is a taken branch. For calls, it is the
335 probability that this call won't return.
336 REG_EXEC_COUNT is attached to the first insn of each basic block, and
337 the first insn after each CALL_INSN. It indicates how many times this
339 REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
340 allocations for targets where SETJMP_VIA_SAVE_AREA is true.
341 REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
342 flags computed by get_jump_flags() after dbr scheduling is complete.
343 REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
344 but are too complex for DWARF to interpret what they imply. The attached
345 rtx is used instead of intuition. */
346 /* REG_EH_REGION is used to indicate what exception region an INSN
347 belongs in. This can be used to indicate what region a call may throw
348 to. a REGION of 0 indicates that a call cannot throw at all.
349 REG_EH_RETHROW is used to indicate what that a call is actually a
350 call to rethrow, and specifies which region the rethrow is targetting.
351 This provides a way to generate the non standard flow edges required
355 #define REG_NOTES(INSN) ((INSN)->fld[6].rtx)
357 #define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags)
359 /* Don't forget to change reg_note_name in rtl.c. */
360 enum reg_note
{ REG_DEAD
= 1, REG_INC
= 2, REG_EQUIV
= 3, REG_WAS_0
= 4,
361 REG_EQUAL
= 5, REG_RETVAL
= 6, REG_LIBCALL
= 7,
362 REG_NONNEG
= 8, REG_NO_CONFLICT
= 9, REG_UNUSED
= 10,
363 REG_CC_SETTER
= 11, REG_CC_USER
= 12, REG_LABEL
= 13,
364 REG_DEP_ANTI
= 14, REG_DEP_OUTPUT
= 15, REG_BR_PROB
= 16,
365 REG_EXEC_COUNT
= 17, REG_NOALIAS
= 18, REG_SAVE_AREA
= 19,
366 REG_BR_PRED
= 20, REG_EH_CONTEXT
= 21,
367 REG_FRAME_RELATED_EXPR
= 22, REG_EH_REGION
= 23,
368 REG_EH_RETHROW
= 24 };
369 /* The base value for branch probability notes. */
370 #define REG_BR_PROB_BASE 10000
372 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
373 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
374 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
376 /* Names for REG_NOTE's in EXPR_LIST insn's. */
378 extern char *reg_note_name
[];
379 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
381 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
382 USE and CLOBBER expressions.
383 USE expressions list the registers filled with arguments that
384 are passed to the function.
385 CLOBBER expressions document the registers explicitly clobbered
387 Pseudo registers can not be mentioned in this list. */
388 #define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx)
390 /* The label-number of a code-label. The assembler label
391 is made from `L' and the label-number printed in decimal.
392 Label numbers are unique in a compilation. */
393 #define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint)
395 #define LINE_NUMBER NOTE
397 /* In a NOTE that is a line number, this is a string for the file name that the
398 line is in. We use the same field to record block numbers temporarily in
399 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
400 between ints and pointers if we use a different macro for the block number.)
401 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
402 information as a rtx in the field. */
404 #define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr)
405 #define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint)
406 #define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx)
407 #define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx)
408 #define NOTE_BASIC_BLOCK(INSN) ((INSN)->fld[3].bb)
410 /* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new
411 block node for a live range block. */
412 #define NOTE_BLOCK_LIVE_RANGE_BLOCK -1
414 /* In a NOTE that is a line number, this is the line number.
415 Other kinds of NOTEs are identified by negative numbers here. */
416 #define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint)
418 /* Codes that appear in the NOTE_LINE_NUMBER field
419 for kinds of notes that are not line numbers.
421 Notice that we do not try to use zero here for any of
422 the special note codes because sometimes the source line
423 actually can be zero! This happens (for example) when we
424 are generating code for the per-translation-unit constructor
425 and destructor routines for some C++ translation unit.
427 If you should change any of the following values, or if you
428 should add a new value here, don't forget to change the
429 note_insn_name array in rtl.c. */
431 /* This note is used to get rid of an insn
432 when it isn't safe to patch the insn out of the chain. */
433 #define NOTE_INSN_DELETED -1
434 #define NOTE_INSN_BLOCK_BEG -2
435 #define NOTE_INSN_BLOCK_END -3
436 #define NOTE_INSN_LOOP_BEG -4
437 #define NOTE_INSN_LOOP_END -5
438 /* This kind of note is generated at the end of the function body,
439 just before the return insn or return label.
440 In an optimizing compilation it is deleted by the first jump optimization,
441 after enabling that optimizer to determine whether control can fall
442 off the end of the function body without a return statement. */
443 #define NOTE_INSN_FUNCTION_END -6
444 /* This kind of note is generated just after each call to `setjmp', et al. */
445 #define NOTE_INSN_SETJMP -7
446 /* Generated at the place in a loop that `continue' jumps to. */
447 #define NOTE_INSN_LOOP_CONT -8
448 /* Generated at the start of a duplicated exit test. */
449 #define NOTE_INSN_LOOP_VTOP -9
450 /* This marks the point immediately after the last prologue insn. */
451 #define NOTE_INSN_PROLOGUE_END -10
452 /* This marks the point immediately prior to the first epilogue insn. */
453 #define NOTE_INSN_EPILOGUE_BEG -11
454 /* Generated in place of user-declared labels when they are deleted. */
455 #define NOTE_INSN_DELETED_LABEL -12
456 /* This note indicates the start of the real body of the function,
457 i.e. the point just after all of the parms have been moved into
459 #define NOTE_INSN_FUNCTION_BEG -13
460 /* These note where exception handling regions begin and end. */
461 #define NOTE_INSN_EH_REGION_BEG -14
462 #define NOTE_INSN_EH_REGION_END -15
463 /* Generated whenever a duplicate line number note is output. For example,
464 one is output after the end of an inline function, in order to prevent
465 the line containing the inline call from being counted twice in gcov. */
466 #define NOTE_REPEATED_LINE_NUMBER -16
468 /* Start/end of a live range region, where pseudos allocated on the stack can
469 be allocated to temporary registers. */
470 #define NOTE_INSN_RANGE_START -17
471 #define NOTE_INSN_RANGE_END -18
472 /* Record which registers are currently live. */
473 #define NOTE_INSN_LIVE -19
474 /* Record the struct for the following basic block. */
475 #define NOTE_INSN_BASIC_BLOCK -20
477 #if 0 /* These are not used, and I don't know what they were for. --rms. */
478 #define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr)
479 #define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint)
480 #define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx)
481 #define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint)
482 #define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint)
485 /* Names for NOTE insn's other than line numbers. */
487 extern char *note_insn_name
[];
488 #define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
490 /* The name of a label, in case it corresponds to an explicit label
491 in the input source code. */
492 #define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr)
494 /* In jump.c, each label contains a count of the number
495 of LABEL_REFs that point at it, so unused labels can be deleted. */
496 #define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint)
498 /* The original regno this ADDRESSOF was built for. */
499 #define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint)
501 /* The variable in the register we took the address of. */
502 #define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2))
503 #define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T))
505 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
506 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
507 be decremented and possibly the label can be deleted. */
508 #define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx)
510 /* Once basic blocks are found in flow.c,
511 each CODE_LABEL starts a chain that goes through
512 all the LABEL_REFs that jump to that label.
513 The chain eventually winds up at the CODE_LABEL; it is circular. */
514 #define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx)
516 /* This is the field in the LABEL_REF through which the circular chain
517 of references to a particular label is linked.
518 This chain is set up in flow.c. */
520 #define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx)
522 /* Once basic blocks are found in flow.c,
523 Each LABEL_REF points to its containing instruction with this field. */
525 #define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx)
527 /* For a REG rtx, REGNO extracts the register number. */
529 #define REGNO(RTX) ((RTX)->fld[0].rtint)
531 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
532 is the current function's return value. */
534 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
536 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
537 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
539 /* For a CONST_INT rtx, INTVAL extracts the integer. */
541 #define INTVAL(RTX) ((RTX)->fld[0].rtwint)
543 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
544 SUBREG_WORD extracts the word-number. */
546 #define SUBREG_REG(RTX) ((RTX)->fld[0].rtx)
547 #define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint)
549 /* 1 if the REG contained in SUBREG_REG is already known to be
550 sign- or zero-extended from the mode of the SUBREG to the mode of
551 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
554 When used as a LHS, is means that this extension must be done
555 when assigning to SUBREG_REG. */
557 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
558 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
560 /* Access various components of an ASM_OPERANDS rtx. */
562 #define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0)
563 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1)
564 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2)
565 #define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3)
566 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4)
567 #define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N))
568 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3)
569 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0)
570 #define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N)))
571 #define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5)
572 #define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6)
574 /* For a MEM rtx, 1 if it's a volatile reference.
575 Also in an ASM_OPERANDS rtx. */
576 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
578 /* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero,
579 RTX may or may not refer to a field of an aggregate. */
580 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
582 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
583 not refer to a scalar.*/
584 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
586 /* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P
587 attributes from RHS to LHS. */
588 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
589 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
590 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
591 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS))
593 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
594 RTX. Otherwise, vice versa. Use this macro only when you are
595 *sure* that you know that the MEM is in a structure, or is a
596 scalar. VAL is evaluated only once. */
597 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
598 ((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \
599 : (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1))
601 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
602 set, and may alias anything. Otherwise, the MEM can only alias
603 MEMs in the same alias set. This value is set in a
604 language-dependent manner in the front-end, and should not be
605 altered in the back-end. These set numbers are tested for zero,
606 and compared for equality; they have no other significance. In
607 some front-ends, these numbers may correspond in some way to types,
608 or other language-level entities, but they need not, and the
609 back-end makes no such assumptions. */
610 #define MEM_ALIAS_SET(RTX) (XINT (RTX, 1))
612 /* For a LABEL_REF, 1 means that this reference is to a label outside the
613 loop containing the reference. */
614 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
616 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
617 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
618 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
620 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
621 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
623 /* For a REG, 1 means the register is used only in an exit test of a loop. */
624 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
626 /* During sched, for an insn, 1 means that the insn must be scheduled together
627 with the preceding insn. */
628 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
630 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
631 cost of the dependence link. The cost of executing an instruction
632 may vary based on how the results are used. LINK_COST_ZERO is 1 when
633 the cost through the link varies and is unchanged (i.e., the link has
634 zero additional cost). LINK_COST_FREE is 1 when the cost through the
635 link is zero (i.e., the link makes the cost free). In other cases,
636 the adjustment to the cost is recomputed each time it is needed. */
637 #define LINK_COST_ZERO(X) ((X)->jump)
638 #define LINK_COST_FREE(X) ((X)->call)
640 /* For a SET rtx, SET_DEST is the place that is set
641 and SET_SRC is the value it is set to. */
642 #define SET_DEST(RTX) ((RTX)->fld[0].rtx)
643 #define SET_SRC(RTX) ((RTX)->fld[1].rtx)
645 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
646 #define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx)
647 #define TRAP_CODE(RTX) (RTX)->fld[1].rtx
649 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
650 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
652 /* Flag in a SYMBOL_REF for machine-specific purposes. */
653 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
655 /* 1 in a SYMBOL_REF if it represents a symbol which might have to change
656 if its inlined or unrolled. */
657 #define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
659 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
660 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
662 /* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn
663 of the function that is not involved in copying parameters to
664 pseudo-registers. FIRST_PARM_INSN is the very first insn of
665 the function, including the parameter copying.
666 We keep this around in case we must splice
667 this function into the assembly code at the end of the file.
668 FIRST_LABELNO is the first label number used by the function (inclusive).
669 LAST_LABELNO is the last label used by the function (exclusive).
670 MAX_REGNUM is the largest pseudo-register used by that function.
671 FUNCTION_ARGS_SIZE is the size of the argument block in the stack.
672 POPS_ARGS is the number of bytes of input arguments popped by the function
673 STACK_SLOT_LIST is the list of stack slots.
674 FORCED_LABELS is the list of labels whose address was taken.
675 FUNCTION_FLAGS are where single-bit flags are saved.
676 OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list.
677 ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values
678 for the function arguments.
679 ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the
681 INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and
682 INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays.
684 We want this to lay down like an INSN. The PREV_INSN field
685 is always NULL. The NEXT_INSN field always points to the
686 first function insn of the function being squirreled away. */
688 #define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx)
689 #define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx)
690 #define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint)
691 #define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint)
692 #define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint)
693 #define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint)
694 #define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint)
695 #define POPS_ARGS(RTX) ((RTX)->fld[9].rtint)
696 #define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx)
697 #define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx)
698 #define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint)
699 #define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint)
700 #define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec)
701 #define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx)
702 #define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec)
703 #define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr)
704 #define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr)
705 #define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec)
707 /* In FUNCTION_FLAGS we save some variables computed when emitting the code
708 for the function and which must be `or'ed into the current flag values when
709 insns from that function are being inlined. */
711 /* These ought to be an enum, but non-ANSI compilers don't like that. */
712 #define FUNCTION_FLAGS_CALLS_ALLOCA 01
713 #define FUNCTION_FLAGS_CALLS_SETJMP 02
714 #define FUNCTION_FLAGS_RETURNS_STRUCT 04
715 #define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010
716 #define FUNCTION_FLAGS_NEEDS_CONTEXT 020
717 #define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040
718 #define FUNCTION_FLAGS_RETURNS_POINTER 0100
719 #define FUNCTION_FLAGS_USES_CONST_POOL 0200
720 #define FUNCTION_FLAGS_CALLS_LONGJMP 0400
721 #define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000
722 #define FUNCTION_FLAGS_HAS_COMPUTED_JUMP 02000
724 /* Define a macro to look for REG_INC notes,
725 but save time on machines where they never exist. */
727 /* Don't continue this line--convex cc version 4.1 would lose. */
728 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
729 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
731 #define FIND_REG_INC_NOTE(insn, reg) 0
734 /* Indicate whether the machine has any sort of auto increment addressing.
735 If not, we can avoid checking for REG_INC notes. */
737 /* Don't continue this line--convex cc version 4.1 would lose. */
738 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
742 #ifndef HAVE_PRE_INCREMENT
743 #define HAVE_PRE_INCREMENT 0
746 #ifndef HAVE_PRE_DECREMENT
747 #define HAVE_PRE_DECREMENT 0
750 #ifndef HAVE_POST_INCREMENT
751 #define HAVE_POST_INCREMENT 0
754 #ifndef HAVE_POST_DECREMENT
755 #define HAVE_POST_DECREMENT 0
758 /* Accessors for RANGE_INFO. */
759 /* For RANGE_{START,END} notes return the RANGE_START note. */
760 #define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0))
762 /* For RANGE_{START,END} notes return the RANGE_START note. */
763 #define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1))
765 /* For RANGE_{START,END} notes, return the vector containing the registers used
767 #define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2))
768 #define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N))
769 #define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2))
771 /* For RANGE_{START,END} notes, the number of calls within the range. */
772 #define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3))
774 /* For RANGE_{START,END} notes, the number of insns within the range. */
775 #define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4))
777 /* For RANGE_{START,END} notes, a unique # to identify this range. */
778 #define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5))
780 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
781 #define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6))
783 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
784 #define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7))
786 /* For RANGE_{START,END} notes, the loop depth the range is in. */
787 #define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8))
789 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
791 #define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9))
793 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
795 #define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10))
797 /* For RANGE_START notes, the marker # of the start of the range. */
798 #define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11))
800 /* For RANGE_START notes, the marker # of the end of the range. */
801 #define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12))
803 /* Original pseudo register # for a live range note. */
804 #define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0))
806 /* Pseudo register # original register is copied into or -1. */
807 #define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1))
809 /* How many times a register in a live range note was referenced. */
810 #define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2))
812 /* How many times a register in a live range note was set. */
813 #define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3))
815 /* How many times a register in a live range note died. */
816 #define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4))
818 /* Whether the original value is needed to be copied into the range register at
819 the start of the range. */
820 #define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5))
822 /* # of insns the register copy is live over. */
823 #define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6))
825 /* # of calls the register copy is live over. */
826 #define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7))
828 /* DECL_NODE pointer of the declaration if the register is a user defined
830 #define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8))
832 /* BLOCK_NODE pointer to the block the variable is declared in if the
833 register is a user defined variable. */
834 #define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9))
836 /* EXPR_LIST of the distinct ranges a variable is in. */
837 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
839 /* Block a variable is declared in. */
840 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
842 /* # of distinct ranges a variable is in. */
843 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
845 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
846 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
848 /* For a NOTE_INSN_LIVE note, the original basic block number. */
849 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
851 /* Generally useful functions. */
853 /* The following functions accept a wide integer argument. Rather than
854 having to cast on every function call, we use a macro instead, that is
855 defined here and in tree.h. */
858 #define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
859 #define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
861 extern int exact_log2_wide
PROTO((unsigned HOST_WIDE_INT
));
862 extern int floor_log2_wide
PROTO((unsigned HOST_WIDE_INT
));
865 extern int ceil_log2
PROTO((unsigned HOST_WIDE_INT
));
867 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
869 #define plus_constant_for_output(X,C) \
870 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
873 extern rtx plus_constant_wide
PROTO((rtx
, HOST_WIDE_INT
));
874 extern rtx plus_constant_for_output_wide
PROTO((rtx
, HOST_WIDE_INT
));
875 extern void optimize_save_area_alloca
PROTO((rtx
));
877 extern rtx gen_rtx
PVPROTO((enum rtx_code
,
878 enum machine_mode
, ...));
879 extern rtvec gen_rtvec
PVPROTO((int, ...));
882 extern rtx read_rtx
PROTO((FILE *));
885 extern char *oballoc
PROTO((int));
886 extern char *permalloc
PROTO((int));
887 extern rtx rtx_alloc
PROTO((RTX_CODE
));
888 extern rtvec rtvec_alloc
PROTO((int));
889 extern rtx copy_rtx
PROTO((rtx
));
890 extern rtx copy_rtx_if_shared
PROTO((rtx
));
891 extern rtx copy_most_rtx
PROTO((rtx
, rtx
));
892 extern rtx shallow_copy_rtx
PROTO((rtx
));
893 extern rtvec gen_rtvec_v
PROTO((int, rtx
*));
894 extern rtvec gen_rtvec_vv
PROTO((int, rtunion
*));
895 extern rtx gen_reg_rtx
PROTO((enum machine_mode
));
896 extern rtx gen_label_rtx
PROTO((void));
897 extern rtx gen_inline_header_rtx
PROTO((rtx
, rtx
, int, int, int, int,
898 int, int, rtx
, rtx
, int, int,
900 rtvec
, char *, char *, rtvec
));
901 extern rtx gen_lowpart_common
PROTO((enum machine_mode
, rtx
));
902 extern rtx gen_lowpart
PROTO((enum machine_mode
, rtx
));
903 extern rtx gen_lowpart_if_possible
PROTO((enum machine_mode
, rtx
));
904 extern rtx gen_highpart
PROTO((enum machine_mode
, rtx
));
905 extern rtx gen_realpart
PROTO((enum machine_mode
, rtx
));
906 extern rtx gen_imagpart
PROTO((enum machine_mode
, rtx
));
907 extern rtx operand_subword
PROTO((rtx
, int, int, enum machine_mode
));
908 extern rtx operand_subword_force
PROTO((rtx
, int, enum machine_mode
));
909 extern int subreg_lowpart_p
PROTO((rtx
));
910 extern rtx make_safe_from
PROTO((rtx
, rtx
));
911 extern rtx convert_memory_address
PROTO((enum machine_mode
, rtx
));
912 extern rtx memory_address
PROTO((enum machine_mode
, rtx
));
913 extern rtx get_insns
PROTO((void));
914 extern rtx get_last_insn
PROTO((void));
915 extern rtx get_last_insn_anywhere
PROTO((void));
916 extern void start_sequence
PROTO((void));
917 extern void push_to_sequence
PROTO((rtx
));
918 extern void end_sequence
PROTO((void));
919 extern rtx gen_sequence
PROTO((void));
920 extern rtx immed_double_const
PROTO((HOST_WIDE_INT
, HOST_WIDE_INT
, enum machine_mode
));
921 extern rtx force_const_mem
PROTO((enum machine_mode
, rtx
));
922 extern rtx force_reg
PROTO((enum machine_mode
, rtx
));
923 extern rtx get_pool_constant
PROTO((rtx
));
924 extern enum machine_mode get_pool_mode
PROTO((rtx
));
925 extern int get_pool_offset
PROTO((rtx
));
926 extern rtx simplify_subtraction
PROTO((rtx
));
927 extern rtx assign_stack_local
PROTO((enum machine_mode
,
928 HOST_WIDE_INT
, int));
929 extern rtx assign_stack_temp
PROTO((enum machine_mode
,
930 HOST_WIDE_INT
, int));
931 extern rtx assign_temp
PROTO((union tree_node
*,
933 extern rtx protect_from_queue
PROTO((rtx
, int));
934 extern void emit_queue
PROTO((void));
935 extern rtx emit_move_insn
PROTO((rtx
, rtx
));
936 extern rtx emit_insn_before
PROTO((rtx
, rtx
));
937 extern rtx emit_jump_insn_before
PROTO((rtx
, rtx
));
938 extern rtx emit_call_insn_before
PROTO((rtx
, rtx
));
939 extern rtx emit_barrier_before
PROTO((rtx
));
940 extern rtx emit_label_before
PROTO((rtx
, rtx
));
941 extern rtx emit_note_before
PROTO((int, rtx
));
942 extern rtx emit_insn_after
PROTO((rtx
, rtx
));
943 extern rtx emit_jump_insn_after
PROTO((rtx
, rtx
));
944 extern rtx emit_barrier_after
PROTO((rtx
));
945 extern rtx emit_label_after
PROTO((rtx
, rtx
));
946 extern rtx emit_note_after
PROTO((int, rtx
));
947 extern rtx emit_line_note_after
PROTO((char *, int, rtx
));
948 extern rtx emit_insn
PROTO((rtx
));
949 extern rtx emit_insns
PROTO((rtx
));
950 extern rtx emit_insns_before
PROTO((rtx
, rtx
));
951 extern rtx emit_insns_after
PROTO((rtx
, rtx
));
952 extern rtx emit_jump_insn
PROTO((rtx
));
953 extern rtx emit_call_insn
PROTO((rtx
));
954 extern rtx emit_label
PROTO((rtx
));
955 extern rtx emit_barrier
PROTO((void));
956 extern rtx emit_line_note
PROTO((char *, int));
957 extern rtx emit_note
PROTO((char *, int));
958 extern rtx emit_line_note_force
PROTO((char *, int));
959 extern rtx make_insn_raw
PROTO((rtx
));
960 extern rtx previous_insn
PROTO((rtx
));
961 extern rtx next_insn
PROTO((rtx
));
962 extern rtx prev_nonnote_insn
PROTO((rtx
));
963 extern rtx next_nonnote_insn
PROTO((rtx
));
964 extern rtx prev_real_insn
PROTO((rtx
));
965 extern rtx next_real_insn
PROTO((rtx
));
966 extern rtx prev_active_insn
PROTO((rtx
));
967 extern rtx next_active_insn
PROTO((rtx
));
968 extern rtx prev_label
PROTO((rtx
));
969 extern rtx next_label
PROTO((rtx
));
970 extern rtx next_cc0_user
PROTO((rtx
));
971 extern rtx prev_cc0_setter
PROTO((rtx
));
972 extern rtx next_nondeleted_insn
PROTO((rtx
));
973 extern enum rtx_code reverse_condition
PROTO((enum rtx_code
));
974 extern enum rtx_code swap_condition
PROTO((enum rtx_code
));
975 extern enum rtx_code unsigned_condition
PROTO((enum rtx_code
));
976 extern enum rtx_code signed_condition
PROTO((enum rtx_code
));
977 extern rtx find_equiv_reg
PROTO((rtx
, rtx
, enum reg_class
, int, short *, int, enum machine_mode
));
978 extern rtx squeeze_notes
PROTO((rtx
, rtx
));
979 extern rtx delete_insn
PROTO((rtx
));
980 extern void delete_jump
PROTO((rtx
));
981 extern rtx get_label_before
PROTO((rtx
));
982 extern rtx get_label_after
PROTO((rtx
));
983 extern rtx follow_jumps
PROTO((rtx
));
984 extern rtx adj_offsettable_operand
PROTO((rtx
, int));
985 extern rtx try_split
PROTO((rtx
, rtx
, int));
986 extern rtx split_insns
PROTO((rtx
, rtx
));
987 extern rtx simplify_unary_operation
PROTO((enum rtx_code
, enum machine_mode
, rtx
, enum machine_mode
));
988 extern rtx simplify_binary_operation
PROTO((enum rtx_code
, enum machine_mode
, rtx
, rtx
));
989 extern rtx simplify_ternary_operation
PROTO((enum rtx_code
, enum machine_mode
, enum machine_mode
, rtx
, rtx
, rtx
));
990 extern rtx simplify_relational_operation
PROTO((enum rtx_code
, enum machine_mode
, rtx
, rtx
));
991 extern rtx gen_move_insn
PROTO((rtx
, rtx
));
992 extern rtx gen_jump
PROTO((rtx
));
993 extern rtx gen_beq
PROTO((rtx
));
994 extern rtx gen_bge
PROTO((rtx
));
995 extern rtx gen_ble
PROTO((rtx
));
996 extern rtx gen_mem_addressof
PROTO((rtx
, union tree_node
*));
997 extern rtx eliminate_constant_term
PROTO((rtx
, rtx
*));
998 extern rtx expand_complex_abs
PROTO((enum machine_mode
, rtx
, rtx
, int));
999 extern enum machine_mode choose_hard_reg_mode
PROTO((int, int));
1000 extern void set_unique_reg_note
PROTO((rtx
, enum reg_note
, rtx
));
1002 /* Functions in rtlanal.c */
1004 extern int rtx_unstable_p
PROTO((rtx
));
1005 extern int rtx_varies_p
PROTO((rtx
));
1006 extern int rtx_addr_varies_p
PROTO((rtx
));
1007 extern HOST_WIDE_INT get_integer_term
PROTO((rtx
));
1008 extern rtx get_related_value
PROTO((rtx
));
1009 extern int reg_mentioned_p
PROTO((rtx
, rtx
));
1010 extern int reg_referenced_p
PROTO((rtx
, rtx
));
1011 extern int reg_used_between_p
PROTO((rtx
, rtx
, rtx
));
1012 extern int reg_referenced_between_p
PROTO((rtx
, rtx
, rtx
));
1013 extern int reg_set_between_p
PROTO((rtx
, rtx
, rtx
));
1014 extern int regs_set_between_p
PROTO((rtx
, rtx
, rtx
));
1015 extern int modified_between_p
PROTO((rtx
, rtx
, rtx
));
1016 extern int no_labels_between_p
PROTO((rtx
, rtx
));
1017 extern int no_jumps_between_p
PROTO((rtx
, rtx
));
1018 extern int modified_in_p
PROTO((rtx
, rtx
));
1019 extern int reg_set_p
PROTO((rtx
, rtx
));
1020 extern rtx single_set
PROTO((rtx
));
1021 extern int multiple_sets
PROTO((rtx
));
1022 extern rtx find_last_value
PROTO((rtx
, rtx
*, rtx
, int));
1023 extern int refers_to_regno_p
PROTO((int, int, rtx
, rtx
*));
1024 extern int reg_overlap_mentioned_p
PROTO((rtx
, rtx
));
1025 extern void note_stores
PROTO((rtx
, void (*)(rtx
, rtx
)));
1026 extern rtx reg_set_last
PROTO((rtx
, rtx
));
1027 extern int rtx_equal_p
PROTO((rtx
, rtx
));
1028 extern int dead_or_set_p
PROTO((rtx
, rtx
));
1029 extern int dead_or_set_regno_p
PROTO((rtx
, int));
1030 extern rtx find_reg_note
PROTO((rtx
, enum reg_note
, rtx
));
1031 extern rtx find_regno_note
PROTO((rtx
, enum reg_note
, int));
1032 extern int find_reg_fusage
PROTO((rtx
, enum rtx_code
, rtx
));
1033 extern int find_regno_fusage
PROTO((rtx
, enum rtx_code
, int));
1034 extern void remove_note
PROTO((rtx
, rtx
));
1035 extern int side_effects_p
PROTO((rtx
));
1036 extern int volatile_refs_p
PROTO((rtx
));
1037 extern int volatile_insn_p
PROTO((rtx
));
1038 extern int may_trap_p
PROTO((rtx
));
1039 extern int inequality_comparisons_p
PROTO ((rtx
));
1040 extern rtx replace_rtx
PROTO((rtx
, rtx
, rtx
));
1041 extern rtx replace_regs
PROTO((rtx
, rtx
*, int, int));
1042 extern int computed_jump_p
PROTO((rtx
));
1043 typedef int (*rtx_function
) PROTO((rtx
*, void *));
1044 extern int for_each_rtx
PROTO((rtx
*, rtx_function
, void *));
1045 extern rtx regno_use_in
PROTO((int, rtx
));
1046 extern int auto_inc_p
PROTO((rtx
));
1050 extern rtx find_use_as_address
PROTO((rtx
, rtx
, HOST_WIDE_INT
));
1054 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1055 Always at least 3, since the combiner could put that many togetherm
1056 and we want this to remain correct for all the remaining passes. */
1058 extern int max_parallel
;
1060 /* Free up register info memory. */
1061 extern void free_reg_info
PROTO((void));
1064 extern int asm_noperands
PROTO((rtx
));
1065 extern char *decode_asm_operands
PROTO((rtx
, rtx
*, rtx
**,
1067 enum machine_mode
*));
1069 extern enum reg_class reg_preferred_class
PROTO((int));
1070 extern enum reg_class reg_alternate_class
PROTO((int));
1072 extern rtx get_first_nonparm_insn
PROTO((void));
1074 extern void split_block_insns
PROTO((int, int));
1075 extern void update_flow_info
PROTO((rtx
, rtx
, rtx
, rtx
));
1077 /* Standard pieces of rtx, to be substituted directly into things. */
1078 #define pc_rtx (&global_rtl.pc_val)
1079 #define cc0_rtx (&global_rtl.cc0_val)
1081 #define MAX_SAVED_CONST_INT 64
1082 extern struct rtx_def const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1084 #define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT])
1085 #define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1])
1086 #define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2])
1087 #define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1])
1088 extern rtx const_true_rtx
;
1090 extern rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1092 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1093 same as VOIDmode. */
1095 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1097 /* Likewise, for the constants 1 and 2. */
1099 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1100 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1102 extern struct _global_rtl
1104 struct rtx_def pc_val
, cc0_val
;
1105 struct rtx_def stack_pointer_val
, frame_pointer_val
;
1106 struct rtx_def hard_frame_pointer_val
;
1107 struct rtx_def arg_pointer_val
;
1108 struct rtx_def virtual_incoming_args_val
;
1109 struct rtx_def virtual_stack_vars_val
;
1110 struct rtx_def virtual_stack_dynamic_val
;
1111 struct rtx_def virtual_outgoing_args_val
;
1112 struct rtx_def virtual_cfa_val
;
1115 /* All references to certain hard regs, except those created
1116 by allocating pseudo regs into them (when that's possible),
1117 go through these unique rtx objects. */
1118 #define stack_pointer_rtx (&global_rtl.stack_pointer_val)
1119 #define frame_pointer_rtx (&global_rtl.frame_pointer_val)
1121 extern rtx pic_offset_table_rtx
;
1122 extern rtx struct_value_rtx
;
1123 extern rtx struct_value_incoming_rtx
;
1124 extern rtx static_chain_rtx
;
1125 extern rtx static_chain_incoming_rtx
;
1126 extern rtx return_address_pointer_rtx
;
1128 /* Include the RTL generation functions. */
1134 /* There are some RTL codes that require special attention; the
1135 generation functions included above do the raw handling. If you
1136 add to this list, modify special_rtx in gengenrtl.c as well. You
1137 should also modify gen_rtx to use the special function. */
1139 extern rtx gen_rtx_CONST_DOUBLE
PROTO((enum machine_mode
, rtx
,
1140 HOST_WIDE_INT
, HOST_WIDE_INT
));
1141 extern rtx gen_rtx_CONST_INT
PROTO((enum machine_mode
, HOST_WIDE_INT
));
1142 extern rtx gen_rtx_REG
PROTO((enum machine_mode
, int));
1143 extern rtx gen_rtx_MEM
PROTO((enum machine_mode
, rtx
));
1145 /* We need the cast here to ensure that we get the same result both with
1146 and without prototypes. */
1147 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1150 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1151 is used to represent the frame pointer. This is because the
1152 hard frame pointer and the automatic variables are separated by an amount
1153 that cannot be determined until after register allocation. We can assume
1154 that in this case ELIMINABLE_REGS will be defined, one action of which
1155 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1156 #ifndef HARD_FRAME_POINTER_REGNUM
1157 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1160 /* For register elimination to work properly these hard_frame_pointer_rtx,
1161 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1162 the same register. */
1163 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1164 #define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val)
1166 #define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1169 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1170 #define arg_pointer_rtx (&global_rtl.frame_pointer_val)
1172 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1173 #define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val)
1175 #define arg_pointer_rtx (&global_rtl.arg_pointer_val)
1179 /* Virtual registers are used during RTL generation to refer to locations into
1180 the stack frame when the actual location isn't known until RTL generation
1181 is complete. The routine instantiate_virtual_regs replaces these with
1182 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1185 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1187 /* This points to the first word of the incoming arguments passed on the stack,
1188 either by the caller or by the callee when pretending it was passed by the
1191 #define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val)
1193 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1195 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1196 variable on the stack. Otherwise, it points to the first variable on
1199 #define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val)
1201 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1203 /* This points to the location of dynamically-allocated memory on the stack
1204 immediately after the stack pointer has been adjusted by the amount
1207 #define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val)
1209 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1211 /* This points to the location in the stack at which outgoing arguments should
1212 be written when the stack is pre-pushed (arguments pushed using push
1213 insns always use sp). */
1215 #define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val)
1217 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1219 /* This points to the Canonical Frame Address of the function. This
1220 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1221 but is calculated relative to the arg pointer for simplicity; the
1222 frame pointer nor stack pointer are necessarily fixed relative to
1223 the CFA until after reload. */
1225 #define virtual_cfa_rtx (&global_rtl.virtual_cfa_val)
1227 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1229 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1231 extern rtx find_next_ref
PROTO((rtx
, rtx
));
1232 extern rtx
*find_single_use
PROTO((rtx
, rtx
, rtx
*));
1234 extern rtx output_constant_def
PROTO((union tree_node
*));
1235 extern rtx immed_real_const
PROTO((union tree_node
*));
1236 extern union tree_node
*make_tree
PROTO((union tree_node
*, rtx
));
1238 /* Define a default value for STORE_FLAG_VALUE. */
1240 #ifndef STORE_FLAG_VALUE
1241 #define STORE_FLAG_VALUE 1
1244 /* Nonzero after the second flow pass has completed.
1245 Set to 1 or 0 by toplev.c */
1246 extern int flow2_completed
;
1248 /* Nonzero after end of reload pass.
1249 Set to 1 or 0 by reload1.c. */
1251 extern int reload_completed
;
1253 /* Set to 1 while reload_as_needed is operating.
1254 Required by some machines to handle any generated moves differently. */
1256 extern int reload_in_progress
;
1258 /* If this is nonzero, we do not bother generating VOLATILE
1259 around volatile memory references, and we are willing to
1260 output indirect addresses. If cse is to follow, we reject
1261 indirect addresses so a useful potential cse is generated;
1262 if it is used only once, instruction combination will produce
1263 the same indirect address eventually. */
1264 extern int cse_not_expected
;
1266 /* Set to nonzero before life analysis to indicate that it is unsafe to
1267 generate any new pseudo registers. */
1268 extern int no_new_pseudos
;
1270 /* Indexed by pseudo register number, gives the rtx for that pseudo.
1271 Allocated in parallel with regno_pointer_flag. */
1272 extern rtx
*regno_reg_rtx
;
1274 /* Vector indexed by regno; contain the alignment in bytes and type
1275 pointed to for a register that contains a pointer, if known. */
1276 extern char *regno_pointer_align
;
1277 #define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO]
1279 /* Translates rtx code to tree code, for those codes needed by
1280 REAL_ARITHMETIC. The function returns an int because the caller may not
1281 know what `enum tree_code' means. */
1283 extern int rtx_to_tree_code
PROTO((enum rtx_code
));
1286 extern void obfree
PROTO ((char *));
1288 extern void gcc_obstack_init
PROTO ((struct obstack
*));
1289 extern void pop_obstacks
PROTO ((void));
1290 extern void push_obstacks
PROTO ((struct obstack
*,
1293 extern int read_skip_spaces
PROTO ((FILE *));
1297 struct cse_basic_block_data
;
1298 extern int rtx_cost
PROTO ((rtx
, enum rtx_code
));
1299 extern void delete_trivially_dead_insns
PROTO ((rtx
, int));
1301 extern int cse_main
PROTO ((rtx
, int, int, FILE *));
1303 extern void cse_end_of_basic_block
PROTO ((rtx
,
1304 struct cse_basic_block_data
*,
1308 extern int comparison_dominates_p
PROTO ((enum rtx_code
, enum rtx_code
));
1309 extern int condjump_p
PROTO ((rtx
));
1310 extern rtx condjump_label
PROTO ((rtx
));
1311 extern int simplejump_p
PROTO ((rtx
));
1312 extern int returnjump_p
PROTO ((rtx
));
1313 extern int sets_cc0_p
PROTO ((rtx
));
1314 extern int invert_jump
PROTO ((rtx
, rtx
));
1315 extern int rtx_renumbered_equal_p
PROTO ((rtx
, rtx
));
1316 extern int true_regnum
PROTO ((rtx
));
1317 extern int redirect_jump
PROTO ((rtx
, rtx
));
1318 extern void jump_optimize
PROTO ((rtx
, int, int, int));
1319 extern void thread_jumps
PROTO ((rtx
, int, int));
1320 extern int redirect_exp
PROTO ((rtx
*, rtx
, rtx
, rtx
));
1321 extern int rtx_equal_for_thread_p
PROTO ((rtx
, rtx
, rtx
));
1322 extern int invert_exp
PROTO ((rtx
, rtx
));
1323 extern int can_reverse_comparison_p
PROTO ((rtx
, rtx
));
1324 extern void delete_for_peephole
PROTO ((rtx
, rtx
));
1325 extern int condjump_in_parallel_p
PROTO ((rtx
));
1327 /* Flags for jump_optimize() */
1328 #define JUMP_CROSS_JUMP 1
1329 #define JUMP_NOOP_MOVES 1
1330 #define JUMP_AFTER_REGSCAN 1
1332 /* In emit-rtl.c. */
1333 extern int max_reg_num
PROTO ((void));
1334 extern int max_label_num
PROTO ((void));
1335 extern int get_first_label_num
PROTO ((void));
1336 extern void delete_insns_since
PROTO ((rtx
));
1337 extern void mark_reg_pointer
PROTO ((rtx
, int));
1338 extern void mark_user_reg
PROTO ((rtx
));
1339 extern void reset_used_flags
PROTO ((rtx
));
1340 extern void reorder_insns
PROTO ((rtx
, rtx
, rtx
));
1341 extern int get_max_uid
PROTO ((void));
1342 extern int in_sequence_p
PROTO ((void));
1343 extern void force_next_line_note
PROTO ((void));
1344 extern void init_emit
PROTO ((void));
1345 extern void init_emit_once
PROTO ((int));
1346 extern void push_topmost_sequence
PROTO ((void));
1347 extern void pop_topmost_sequence
PROTO ((void));
1348 extern int subreg_realpart_p
PROTO ((rtx
));
1349 extern void reverse_comparison
PROTO ((rtx
));
1350 extern void set_new_first_and_last_insn
PROTO ((rtx
, rtx
));
1351 extern void set_new_first_and_last_label_num
PROTO ((int, int));
1352 extern void unshare_all_rtl
PROTO ((rtx
));
1353 extern void set_last_insn
PROTO ((rtx
));
1354 extern void link_cc0_insns
PROTO ((rtx
));
1355 extern void add_insn
PROTO ((rtx
));
1356 extern void add_insn_before
PROTO ((rtx
, rtx
));
1357 extern void add_insn_after
PROTO ((rtx
, rtx
));
1358 extern void remove_insn
PROTO ((rtx
));
1359 extern void reorder_insns_with_line_notes
PROTO ((rtx
, rtx
, rtx
));
1360 extern void emit_insn_after_with_line_notes
PROTO ((rtx
, rtx
, rtx
));
1361 extern enum rtx_code classify_insn
PROTO ((rtx
));
1362 extern void init_virtual_regs
PROTO ((void));
1363 extern rtx emit
PROTO ((rtx
));
1364 /* Query and clear/ restore no_line_numbers. This is used by the
1365 switch / case handling in stmt.c to give proper line numbers in
1366 warnings about unreachable code. */
1367 int force_line_numbers
PROTO((void));
1368 void restore_line_number_status
PROTO((int old_value
));
1370 /* In insn-emit.c */
1371 extern void add_clobbers
PROTO ((rtx
, int));
1374 extern void combine_instructions
PROTO ((rtx
, int));
1375 extern int extended_count
PROTO ((rtx
, enum machine_mode
, int));
1376 extern rtx remove_death
PROTO ((int, rtx
));
1378 extern void dump_combine_stats
PROTO ((FILE *));
1379 extern void dump_combine_total_stats
PROTO ((FILE *));
1384 extern void schedule_insns
PROTO ((FILE *));
1387 extern void fix_sched_param
PROTO ((char *, char *));
1390 /* In print-rtl.c */
1391 extern void debug_rtx
PROTO ((rtx
));
1392 extern void debug_rtx_list
PROTO ((rtx
, int));
1393 extern rtx debug_rtx_find
PROTO ((rtx
, int));
1395 extern void print_rtl
PROTO ((FILE *, rtx
));
1396 extern int print_rtl_single
PROTO ((FILE *, rtx
));
1397 extern void print_inline_rtx
PROTO ((FILE *, rtx
, int));
1401 extern void init_loop
PROTO ((void));
1402 extern rtx libcall_other_reg
PROTO ((rtx
, rtx
));
1404 extern void loop_optimize
PROTO ((rtx
, FILE *, int, int));
1406 extern void record_excess_regs
PROTO ((rtx
, rtx
, rtx
*));
1409 extern void reposition_prologue_and_epilogue_notes
PROTO ((rtx
));
1410 extern void thread_prologue_and_epilogue_insns
PROTO ((rtx
));
1411 extern void use_variable
PROTO ((rtx
));
1412 extern HOST_WIDE_INT get_frame_size
PROTO ((void));
1413 extern void preserve_rtl_expr_result
PROTO ((rtx
));
1414 extern void mark_temp_addr_taken
PROTO ((rtx
));
1415 extern void update_temp_slot_address
PROTO ((rtx
, rtx
));
1416 extern void use_variable_after
PROTO ((rtx
, rtx
));
1417 extern void purge_addressof
PROTO ((rtx
));
1420 extern int operands_match_p
PROTO ((rtx
, rtx
));
1421 extern int safe_from_earlyclobber
PROTO ((rtx
, rtx
));
1424 extern void expand_null_return
PROTO((void));
1425 extern void emit_jump
PROTO ((rtx
));
1426 extern int preserve_subexpressions_p
PROTO ((void));
1428 /* List (chain of EXPR_LIST) of labels heading the current handlers for
1430 extern rtx nonlocal_goto_handler_labels
;
1433 extern void init_expr_once
PROTO ((void));
1434 extern void move_by_pieces
PROTO ((rtx
, rtx
, int, int));
1439 extern void stupid_life_analysis
PROTO ((rtx
, int, FILE *));
1443 extern void allocate_bb_life_data
PROTO ((void));
1444 extern void allocate_reg_life_data
PROTO ((void));
1445 extern void recompute_reg_usage
PROTO ((rtx
, int));
1447 extern void dump_flow_info
PROTO ((FILE *));
1449 extern void free_bb_mem
PROTO ((void));
1452 extern void init_expmed
PROTO ((void));
1453 extern void expand_inc
PROTO ((rtx
, rtx
));
1454 extern void expand_dec
PROTO ((rtx
, rtx
));
1455 extern rtx expand_mult_highpart
PROTO ((enum machine_mode
, rtx
,
1456 unsigned HOST_WIDE_INT
, rtx
,
1461 extern int gcse_main
PROTO ((rtx
, FILE *));
1465 extern void mark_elimination
PROTO ((int, int));
1467 extern int global_alloc
PROTO ((FILE *));
1468 extern void dump_global_regs
PROTO ((FILE *));
1471 extern void retry_global_alloc
PROTO ((int, HARD_REG_SET
));
1475 extern int reg_classes_intersect_p
PROTO ((enum reg_class
, enum reg_class
));
1476 extern int reg_class_subset_p
PROTO ((enum reg_class
, enum reg_class
));
1477 extern void globalize_reg
PROTO ((int));
1478 extern void init_regs
PROTO ((void));
1479 extern void init_reg_sets
PROTO ((void));
1480 extern void regset_release_memory
PROTO ((void));
1481 extern void regclass_init
PROTO ((void));
1482 extern void regclass
PROTO ((rtx
, int));
1483 extern void reg_scan
PROTO ((rtx
, int, int));
1484 extern void reg_scan_update
PROTO ((rtx
, rtx
, int));
1485 extern void fix_register
PROTO ((char *, int, int));
1489 extern void regmove_optimize
PROTO ((rtx
, int, FILE *));
1494 extern void dbr_schedule
PROTO ((rtx
, FILE *));
1498 extern void init_optabs
PROTO ((void));
1500 /* In local-alloc.c */
1502 extern void dump_local_alloc
PROTO ((FILE *));
1504 extern void local_alloc
PROTO ((void));
1505 extern int function_invariant_p
PROTO ((rtx
));
1508 extern void reload_cse_regs
PROTO ((rtx
));
1509 extern void init_reload
PROTO ((void));
1510 extern void mark_home_live
PROTO ((int));
1512 extern int reload
PROTO ((rtx
, int, FILE *));
1515 /* In caller-save.c */
1516 extern void init_caller_save
PROTO ((void));
1519 extern void init_branch_prob
PROTO ((const char *));
1521 extern void branch_prob
PROTO ((rtx
, FILE *));
1522 extern void end_branch_prob
PROTO ((FILE *));
1524 extern void output_func_start_profiler
PROTO ((void));
1526 /* In reg-stack.c */
1528 extern void reg_to_stack
PROTO ((rtx
, FILE *));
1530 extern int stack_regs_mentioned_p
PROTO ((rtx
));
1532 /* In fold-const.c */
1533 extern int add_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1534 HOST_WIDE_INT
, HOST_WIDE_INT
,
1535 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1536 extern int neg_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1537 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1538 extern int mul_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1539 HOST_WIDE_INT
, HOST_WIDE_INT
,
1540 HOST_WIDE_INT
*, HOST_WIDE_INT
*));
1541 extern void lshift_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1542 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1543 HOST_WIDE_INT
*, int));
1544 extern void rshift_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1546 HOST_WIDE_INT
*, HOST_WIDE_INT
*, int));
1547 extern void lrotate_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1548 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1550 extern void rrotate_double
PROTO ((HOST_WIDE_INT
, HOST_WIDE_INT
,
1551 HOST_WIDE_INT
, int, HOST_WIDE_INT
*,
1555 /* Emit library call. */
1556 extern void emit_library_call
PVPROTO ((rtx
, int, enum machine_mode
,
1558 extern rtx emit_library_call_value
PVPROTO((rtx
, rtx
, int,
1563 extern int set_dominates_use
PROTO ((int, int, int, rtx
, rtx
));
1566 extern void bss_section
PROTO ((void));
1567 extern int in_data_section
PROTO ((void));
1568 extern int supports_one_only
PROTO ((void));
1571 extern void init_rtl
PROTO ((void));
1572 extern void rtx_free
PROTO ((rtx
));
1575 extern int true_dependence
PROTO ((rtx
, enum machine_mode
, rtx
,
1577 extern int read_dependence
PROTO ((rtx
, rtx
));
1578 extern int anti_dependence
PROTO ((rtx
, rtx
));
1579 extern int output_dependence
PROTO ((rtx
, rtx
));
1580 extern void init_alias_once
PROTO ((void));
1581 extern void init_alias_analysis
PROTO ((void));
1582 extern void end_alias_analysis
PROTO ((void));
1584 extern void record_base_value
PROTO ((int, rtx
, int));
1585 extern void record_alias_subset
PROTO ((int, int));
1586 extern rtx addr_side_effect_eval
PROTO ((rtx
, int, int));