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emit-rtl.c (try_split): Update mark_jump_label call.
[gcc.git] / gcc / rtl.h
1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
4
5 This file is part of GNU CC.
6
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 struct function;
26
27 #include "machmode.h"
28
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
33
34 #ifndef TREE_CODE
35 union tree_node;
36 #endif
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 extern const int rtx_length[];
55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
56
57 extern const char * const rtx_name[];
58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
59
60 extern const char * const rtx_format[];
61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
62
63 extern const char rtx_class[];
64 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
65 \f
66 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
67 relative to which the offsets are calculated, as explained in rtl.def. */
68 typedef struct
69 {
70 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
71 unsigned min_align: 8;
72 /* Flags: */
73 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
74 unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
75 unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
76 unsigned min_after_base: 1; /* minimum address target label is after BASE. */
77 unsigned max_after_base: 1; /* maximum address target label is after BASE. */
78 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
79 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
80 unsigned : 2;
81 unsigned scale : 8;
82 } addr_diff_vec_flags;
83
84 /* Common union for an element of an rtx. */
85
86 typedef union rtunion_def
87 {
88 HOST_WIDE_INT rtwint;
89 int rtint;
90 unsigned int rtuint;
91 const char *rtstr;
92 struct rtx_def *rtx;
93 struct rtvec_def *rtvec;
94 enum machine_mode rttype;
95 addr_diff_vec_flags rt_addr_diff_vec_flags;
96 struct cselib_val_struct *rt_cselib;
97 struct bitmap_head_def *rtbit;
98 union tree_node *rttree;
99 struct basic_block_def *bb;
100 } rtunion;
101
102 /* RTL expression ("rtx"). */
103
104 typedef struct rtx_def
105 {
106 /* The kind of expression this is. */
107 ENUM_BITFIELD(rtx_code) code: 16;
108
109 /* The kind of value the expression has. */
110 ENUM_BITFIELD(machine_mode) mode : 8;
111
112 /* 1 in an INSN if it can alter flow of control
113 within this function.
114 LINK_COST_ZERO in an INSN_LIST. */
115 unsigned int jump : 1;
116 /* 1 in an INSN if it can call another function.
117 LINK_COST_FREE in an INSN_LIST. */
118 unsigned int call : 1;
119 /* 1 in a REG if value of this expression will never change during
120 the current function, even though it is not manifestly constant.
121 1 in a MEM if contents of memory are constant. This does not
122 necessarily mean that the value of this expression is constant.
123 1 in a SUBREG if it is from a promoted variable that is unsigned.
124 1 in a SYMBOL_REF if it addresses something in the per-function
125 constants pool.
126 1 in a CALL_INSN if it is a const call.
127 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
128 reorg until end of compilation; cleared before used. */
129 unsigned int unchanging : 1;
130 /* 1 in a MEM expression if contents of memory are volatile.
131 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
132 if it is deleted.
133 1 in a REG expression if corresponds to a variable declared by the user.
134 0 for an internally generated temporary.
135 In a SYMBOL_REF, this flag is used for machine-specific purposes.
136 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
137 unsigned int volatil : 1;
138 /* 1 in a MEM referring to a field of an aggregate.
139 0 if the MEM was a variable or the result of a * operator in C;
140 1 if it was the result of a . or -> operator (on a struct) in C.
141 1 in a REG if the register is used only in exit code a loop.
142 1 in a SUBREG expression if was generated from a variable with a
143 promoted mode.
144 1 in a CODE_LABEL if the label is used for nonlocal gotos
145 and must not be deleted even if its count is zero.
146 1 in a LABEL_REF if this is a reference to a label outside the
147 current loop.
148 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
149 together with the preceding insn. Valid only within sched.
150 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
151 from the target of a branch. Valid from reorg until end of compilation;
152 cleared before used.
153 1 in an INSN if this insn is dead code. Valid only during
154 dead-code elimination phase; cleared before use. */
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 1 in a SYMBOL_REF if the symbol is weak. */
167 unsigned integrated : 1;
168 /* 1 in an INSN or a SET if this rtx is related to the call frame,
169 either changing how we compute the frame address or saving and
170 restoring registers in the prologue and epilogue.
171 1 in a MEM if the MEM refers to a scalar, rather than a member of
172 an aggregate.
173 1 in a REG if the register is a pointer.
174 1 in a SYMBOL_REF if it addresses something in the per-function
175 constant string pool. */
176 unsigned frame_related : 1;
177
178 /* The first element of the operands of this rtx.
179 The number of operands and their types are controlled
180 by the `code' field, according to rtl.def. */
181 rtunion fld[1];
182 } *rtx;
183
184 #define NULL_RTX (rtx) 0
185
186 /* Define macros to access the `code' field of the rtx. */
187
188 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
189 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
190
191 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
192 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
193
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)
197
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. */
201
202 typedef struct rtvec_def{
203 int num_elem; /* number of elements */
204 struct rtx_def *elem[1];
205 } *rtvec;
206
207 #define NULL_RTVEC (rtvec) 0
208
209 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
210 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
211
212 /* Predicate yielding nonzero iff X is an rtl for a register. */
213 #define REG_P(X) (GET_CODE (X) == REG)
214
215 /* Predicate yielding nonzero iff X is a label insn. */
216 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
217
218 /* Predicate yielding nonzero iff X is a jump insn. */
219 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
220
221 /* Predicate yielding nonzero iff X is a note insn. */
222 #define NOTE_P(X) (GET_CODE (X) == NOTE)
223
224 /* Predicate yielding nonzero iff X is a barrier insn. */
225 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
226
227 /* Predicate yielding nonzero iff X is a data for a jump table. */
228 #define JUMP_TABLE_DATA_P(INSN) \
229 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
230 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
231
232 /* 1 if X is a constant value that is an integer. */
233
234 #define CONSTANT_P(X) \
235 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
236 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
237 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
238 || GET_CODE (X) == CONSTANT_P_RTX)
239
240 /* General accessor macros for accessing the fields of an rtx. */
241
242 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
243 /* The bit with a star outside the statement expr and an & inside is
244 so that N can be evaluated only once. */
245 #define RTL_CHECK1(RTX, N, C1) __extension__ \
246 (*({ rtx _rtx = (RTX); int _n = (N); \
247 enum rtx_code _code = GET_CODE (_rtx); \
248 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
249 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
250 if (GET_RTX_FORMAT(_code)[_n] != C1) \
251 rtl_check_failed_type1(_rtx, _n, C1, __FILE__, __LINE__, __FUNCTION__); \
252 &_rtx->fld[_n]; }))
253
254 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
255 (*({ rtx _rtx = (RTX); int _n = (N); \
256 enum rtx_code _code = GET_CODE (_rtx); \
257 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
258 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
259 if (GET_RTX_FORMAT(_code)[_n] != C1 \
260 && GET_RTX_FORMAT(_code)[_n] != C2) \
261 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
262 __FUNCTION__); \
263 &_rtx->fld[_n]; }))
264
265 #define RTL_CHECKC1(RTX, N, C) __extension__ \
266 (*({ rtx _rtx = (RTX); int _n = (N); \
267 if (GET_CODE (_rtx) != C) \
268 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, __FUNCTION__); \
269 &_rtx->fld[_n]; }))
270
271 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
272 (*({ rtx _rtx = (RTX); int _n = (N); \
273 enum rtx_code _code = GET_CODE (_rtx); \
274 if (_code != C1 && _code != C2) \
275 rtl_check_failed_code2(_rtx, C1, C2, __FILE__, __LINE__, __FUNCTION__); \
276 &_rtx->fld[_n]; }))
277
278 #define RTVEC_ELT(RTVEC, I) __extension__ \
279 (*({ rtvec _rtvec = (RTVEC); int _i = (I); \
280 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
281 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
282 __FUNCTION__); \
283 &_rtvec->elem[_i]; }))
284
285 extern void rtl_check_failed_bounds PARAMS ((rtx, int,
286 const char *, int, const char *))
287 ATTRIBUTE_NORETURN;
288 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
289 const char *, int, const char *))
290 ATTRIBUTE_NORETURN;
291 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
292 const char *, int, const char *))
293 ATTRIBUTE_NORETURN;
294 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
295 const char *, int, const char *))
296 ATTRIBUTE_NORETURN;
297 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
298 const char *, int, const char *))
299 ATTRIBUTE_NORETURN;
300 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
301 const char *, int, const char *))
302 ATTRIBUTE_NORETURN;
303
304 #else /* not ENABLE_RTL_CHECKING */
305
306 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
307 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
308 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
309 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
310 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
311
312 #endif
313
314 #define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
315 #define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
316 #define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
317 #define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
318 #define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
319 #define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
320 #define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
321 #define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
322 #define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
323 #define XTMPL(RTX, N) (RTL_CHECK1(RTX, N, 'T').rtstr)
324
325 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
326 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
327
328 /* These are like XWINT, etc. except that they expect a '0' field instead
329 of the normal type code. */
330
331 #define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
332 #define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
333 #define X0UINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtuint)
334 #define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
335 #define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
336 #define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
337 #define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
338 #define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
339 #define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
340 #define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
341 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
342 #define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
343
344 #define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
345 #define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
346 #define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
347 #define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
348 #define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
349 #define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
350 #define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
351 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
352 #define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
353 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
354 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
355 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
356
357 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
358 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
359
360 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
361 \f
362 /* ACCESS MACROS for particular fields of insns. */
363
364 /* Determines whether X is an insn. */
365 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
366
367 /* Holds a unique number for each insn.
368 These are not necessarily sequentially increasing. */
369 #define INSN_UID(INSN) XINT(INSN, 0)
370
371 /* Chain insns together in sequence. */
372 #define PREV_INSN(INSN) XEXP(INSN, 1)
373 #define NEXT_INSN(INSN) XEXP(INSN, 2)
374
375 /* The body of an insn. */
376 #define PATTERN(INSN) XEXP(INSN, 3)
377
378 /* Code number of instruction, from when it was recognized.
379 -1 means this instruction has not been recognized yet. */
380 #define INSN_CODE(INSN) XINT(INSN, 4)
381
382 /* Set up in flow.c; empty before then.
383 Holds a chain of INSN_LIST rtx's whose first operands point at
384 previous insns with direct data-flow connections to this one.
385 That means that those insns set variables whose next use is in this insn.
386 They are always in the same basic block as this insn. */
387 #define LOG_LINKS(INSN) XEXP(INSN, 5)
388
389 /* 1 if insn has been deleted. */
390 #define INSN_DELETED_P(INSN) ((INSN)->volatil)
391
392 /* 1 if insn is a call to a const function. */
393 #define CONST_CALL_P(INSN) ((INSN)->unchanging)
394
395 /* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
396 #define SIBLING_CALL_P(INSN) ((INSN)->jump)
397
398 /* 1 if insn is a branch that should not unconditionally execute its
399 delay slots, i.e., it is an annulled branch. */
400 #define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
401
402 /* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
403 #define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
404
405 /* 1 if insn is in a delay slot and is from the target of the branch. If
406 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
407 executed if the branch is taken. For annulled branches with this bit
408 clear, the insn should be executed only if the branch is not taken. */
409 #define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
410
411 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
412
413 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
414
415 /* Holds a list of notes on what this insn does to various REGs.
416 It is a chain of EXPR_LIST rtx's, where the second operand is the
417 chain pointer and the first operand is the REG being described.
418 The mode field of the EXPR_LIST contains not a real machine mode
419 but a value from enum reg_note. */
420
421 #define REG_NOTES(INSN) XEXP(INSN, 6)
422
423 /* Don't forget to change reg_note_name in rtl.c. */
424 enum reg_note
425 {
426 /* The value in REG dies in this insn (i.e., it is not needed past
427 this insn). If REG is set in this insn, the REG_DEAD note may,
428 but need not, be omitted. */
429 REG_DEAD = 1,
430
431 /* The REG is autoincremented or autodecremented. */
432 REG_INC,
433
434 /* Describes the insn as a whole; it says that the insn sets a register
435 to a constant value or to be equivalent to a memory address. If the
436 register is spilled to the stack then the constant value should be
437 substituted for it. The contents of the REG_EQUIV is the constant
438 value or memory address, which may be different from the source of
439 the SET although it has the same value. A REG_EQUIV note may also
440 appear on an insn which copies a register parameter to a pseudo-register,
441 if there is a memory address which could be used to hold that
442 pseudo-register throughout the function. */
443 REG_EQUIV,
444
445 /* Like REG_EQUIV except that the destination is only momentarily equal
446 to the specified rtx. Therefore, it cannot be used for substitution;
447 but it can be used for cse. */
448 REG_EQUAL,
449
450 /* The register set in this insn held 0 before the insn. The contents of
451 the note is the insn that stored the 0. If that insn is deleted or
452 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
453 is actually an INSN_LIST, not an EXPR_LIST. */
454 REG_WAS_0,
455
456 /* This insn copies the return-value of a library call out of the hard reg
457 for return values. This note is actually an INSN_LIST and it points to
458 the first insn involved in setting up arguments for the call. flow.c
459 uses this to delete the entire library call when its result is dead. */
460 REG_RETVAL,
461
462 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
463 and points at the one that has the REG_RETVAL. This note is also an
464 INSN_LIST. */
465 REG_LIBCALL,
466
467 /* The register is always nonnegative during the containing loop. This is
468 used in branches so that decrement and branch instructions terminating
469 on zero can be matched. There must be an insn pattern in the md file
470 named `decrement_and_branch_until_zero' or else this will never be added
471 to any instructions. */
472 REG_NONNEG,
473
474 /* There is no conflict *after this insn* between the register in the note
475 and the destination of this insn. */
476 REG_NO_CONFLICT,
477
478 /* Identifies a register set in this insn and never used. */
479 REG_UNUSED,
480
481 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
482 respectively. Normally, these are required to be consecutive insns, but
483 we permit putting a cc0-setting insn in the delay slot of a branch as
484 long as only one copy of the insn exists. In that case, these notes
485 point from one to the other to allow code generation to determine what
486 any require information and to properly update CC_STATUS. These notes
487 are INSN_LISTs. */
488 REG_CC_SETTER, REG_CC_USER,
489
490 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
491 CODE_LABEL contained in the REG_LABEL note is used by the insn.
492 This note is an INSN_LIST. */
493 REG_LABEL,
494
495 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
496 write-after-read and write-after-write dependencies respectively.
497 Data dependencies, which are the only type of LOG_LINK created by
498 flow, are represented by a 0 reg note kind. */
499 REG_DEP_ANTI, REG_DEP_OUTPUT,
500
501 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
502 It has an integer value. For jumps, it is the probability that this is a
503 taken branch. For calls, it is the probability that this call won't
504 return. */
505 REG_BR_PROB,
506
507 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
508 the first insn after each CALL_INSN. It indicates how many times this
509 block was executed. */
510 REG_EXEC_COUNT,
511
512 /* Attached to a call insn; indicates that the call is malloc-like and
513 that the pointer returned cannot alias anything else. */
514 REG_NOALIAS,
515
516 /* Used to optimize rtl generated by dynamic stack allocations for targets
517 where SETJMP_VIA_SAVE_AREA is true. */
518 REG_SAVE_AREA,
519
520 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
521 CONCAT of two integer value. First specifies the branch predictor
522 that added the note, second specifies the predicted hitrate of branch
523 in the same format as REG_BR_PROB note uses. */
524 REG_BR_PRED,
525
526 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
527 for DWARF to interpret what they imply. The attached rtx is used
528 instead of intuition. */
529 REG_FRAME_RELATED_EXPR,
530
531 /* Indicates that REG holds the exception context for the function.
532 This context is shared by inline functions, so the code to acquire
533 the real exception context is delayed until after inlining. */
534 REG_EH_CONTEXT,
535
536 /* Indicates what exception region an INSN belongs in. This is used to
537 indicate what region to which a call may throw. REGION 0 indicates
538 that a call cannot throw at all. REGION -1 indicates that it cannot
539 throw, nor will it execute a non-local goto. */
540 REG_EH_REGION,
541
542 /* Indicates that a call is actually a call to rethrow, and specifies the
543 rethrow symbol for the region the rethrow is targetting. This provides
544 a way to generate the non standard flow edges required for a rethrow. */
545 REG_EH_RETHROW,
546
547 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
548 REG_SAVE_NOTE,
549
550 /* Indicates that this insn (which is part of the prologue) computes
551 a value which might not be used later, and if so it's OK to delete
552 the insn. Normally, deleting any insn in the prologue is an error.
553 At present the parameter is unused and set to (const_int 0). */
554 REG_MAYBE_DEAD,
555
556 /* Indicates that a call does not return. */
557 REG_NORETURN,
558
559 /* Indicates that an indirect jump is a non-local goto instead of a
560 computed goto. */
561 REG_NON_LOCAL_GOTO
562 };
563
564 /* The base value for branch probability notes. */
565 #define REG_BR_PROB_BASE 10000
566
567 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
568 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
569 #define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
570
571 /* Names for REG_NOTE's in EXPR_LIST insn's. */
572
573 extern const char * const reg_note_name[];
574 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
575
576 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
577 USE and CLOBBER expressions.
578 USE expressions list the registers filled with arguments that
579 are passed to the function.
580 CLOBBER expressions document the registers explicitly clobbered
581 by this CALL_INSN.
582 Pseudo registers can not be mentioned in this list. */
583 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
584
585 /* The label-number of a code-label. The assembler label
586 is made from `L' and the label-number printed in decimal.
587 Label numbers are unique in a compilation. */
588 #define CODE_LABEL_NUMBER(INSN) XINT(INSN, 5)
589
590 #define LINE_NUMBER NOTE
591
592 /* In a NOTE that is a line number, this is a string for the file name that the
593 line is in. We use the same field to record block numbers temporarily in
594 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
595 between ints and pointers if we use a different macro for the block number.)
596 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
597 information as a rtx in the field. */
598
599 #define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
600 #define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
601 #define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
602 #define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
603 #define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
604 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
605 #define NOTE_EXPECTED_VALUE(INSN) XCEXP(INSN, 3, NOTE)
606
607 /* In a NOTE that is a line number, this is the line number.
608 Other kinds of NOTEs are identified by negative numbers here. */
609 #define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
610
611 /* Nonzero if INSN is a note marking the beginning of a basic block. */
612 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
613 (GET_CODE (INSN) == NOTE \
614 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
615
616 /* Codes that appear in the NOTE_LINE_NUMBER field
617 for kinds of notes that are not line numbers.
618
619 Notice that we do not try to use zero here for any of
620 the special note codes because sometimes the source line
621 actually can be zero! This happens (for example) when we
622 are generating code for the per-translation-unit constructor
623 and destructor routines for some C++ translation unit.
624
625 If you should change any of the following values, or if you
626 should add a new value here, don't forget to change the
627 note_insn_name array in rtl.c. */
628
629 enum insn_note
630 {
631 /* Keep all of these numbers negative. Adjust as needed. */
632 NOTE_INSN_BIAS = -100,
633
634 /* This note is used to get rid of an insn
635 when it isn't safe to patch the insn out of the chain. */
636 NOTE_INSN_DELETED,
637
638 /* These are used to mark the beginning and end of a lexical block.
639 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
640 NOTE_INSN_BLOCK_BEG,
641 NOTE_INSN_BLOCK_END,
642
643 /* These mark the extremes of a loop. */
644 NOTE_INSN_LOOP_BEG,
645 NOTE_INSN_LOOP_END,
646
647 /* Generated at the place in a loop that `continue' jumps to. */
648 NOTE_INSN_LOOP_CONT,
649 /* Generated at the start of a duplicated exit test. */
650 NOTE_INSN_LOOP_VTOP,
651
652 /* This kind of note is generated at the end of the function body,
653 just before the return insn or return label. In an optimizing
654 compilation it is deleted by the first jump optimization, after
655 enabling that optimizer to determine whether control can fall
656 off the end of the function body without a return statement. */
657 NOTE_INSN_FUNCTION_END,
658
659 /* This kind of note is generated just after each call to `setjmp',
660 and similar functions that can return twice. */
661 NOTE_INSN_SETJMP,
662
663 /* This marks the point immediately after the last prologue insn. */
664 NOTE_INSN_PROLOGUE_END,
665
666 /* This marks the point immediately prior to the first epilogue insn. */
667 NOTE_INSN_EPILOGUE_BEG,
668
669 /* Generated in place of user-declared labels when they are deleted. */
670 NOTE_INSN_DELETED_LABEL,
671
672 /* This note indicates the start of the real body of the function,
673 i.e. the point just after all of the parms have been moved into
674 their homes, etc. */
675 NOTE_INSN_FUNCTION_BEG,
676
677 /* These note where exception handling regions begin and end.
678 Uses NOTE_EH_HANDLER to identify the region in question. */
679 NOTE_INSN_EH_REGION_BEG,
680 NOTE_INSN_EH_REGION_END,
681
682 /* Generated whenever a duplicate line number note is output. For example,
683 one is output after the end of an inline function, in order to prevent
684 the line containing the inline call from being counted twice in gcov. */
685 NOTE_INSN_REPEATED_LINE_NUMBER,
686
687 /* Start/end of a live range region, where pseudos allocated on the stack
688 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
689 NOTE_INSN_RANGE_BEG,
690 NOTE_INSN_RANGE_END,
691
692 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
693 NOTE_INSN_LIVE,
694
695 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
696 NOTE_INSN_BASIC_BLOCK,
697
698 /* Record the expected value of a register at a location. Uses
699 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
700 NOTE_INSN_EXPECTED_VALUE,
701
702 NOTE_INSN_MAX
703 };
704
705 /* Names for NOTE insn's other than line numbers. */
706
707 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
708 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
709 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
710
711 /* The name of a label, in case it corresponds to an explicit label
712 in the input source code. */
713 #define LABEL_NAME(RTX) XCSTR(RTX, 6, CODE_LABEL)
714
715 /* In jump.c, each label contains a count of the number
716 of LABEL_REFs that point at it, so unused labels can be deleted. */
717 #define LABEL_NUSES(RTX) XCINT(RTX, 3, CODE_LABEL)
718
719 /* Associate a name with a CODE_LABEL. */
720 #define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
721
722 /* The original regno this ADDRESSOF was built for. */
723 #define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
724
725 /* The variable in the register we took the address of. */
726 #define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
727
728 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
729 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
730 be decremented and possibly the label can be deleted. */
731 #define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
732
733 /* Once basic blocks are found in flow.c,
734 each CODE_LABEL starts a chain that goes through
735 all the LABEL_REFs that jump to that label.
736 The chain eventually winds up at the CODE_LABEL: it is circular. */
737 #define LABEL_REFS(LABEL) XCEXP(LABEL, 4, CODE_LABEL)
738 \f
739 /* This is the field in the LABEL_REF through which the circular chain
740 of references to a particular label is linked.
741 This chain is set up in flow.c. */
742
743 #define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
744
745 /* Once basic blocks are found in flow.c,
746 Each LABEL_REF points to its containing instruction with this field. */
747
748 #define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
749
750 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
751 the number the register originally had; for a pseudo register turned into
752 a hard reg this will hold the old pseudo register number. */
753
754 #define REGNO(RTX) XCUINT(RTX, 0, REG)
755 #define ORIGINAL_REGNO(RTX) X0UINT(RTX, 1)
756
757 /* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
758 is the current function's return value. */
759
760 #define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
761
762 /* 1 in a REG rtx if it corresponds to a variable declared by the user. */
763 #define REG_USERVAR_P(RTX) ((RTX)->volatil)
764
765 /* 1 in a REG rtx if the register is a pointer. */
766 #define REG_POINTER(RTX) ((RTX)->frame_related)
767
768 /* 1 if the given register REG corresponds to a hard register. */
769 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
770
771 /* 1 if the given register number REG_NO corresponds to a hard register. */
772 #define HARD_REGISTER_NUM_P(REG_NO) (REG_NO < FIRST_PSEUDO_REGISTER)
773
774 /* For a CONST_INT rtx, INTVAL extracts the integer. */
775
776 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
777
778 /* For a CONST_DOUBLE:
779 The usual two ints that hold the value.
780 For a DImode, that is all there are;
781 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
782 For a float, the number of ints varies,
783 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
784 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
785 #define CONST_DOUBLE_LOW(r) XCWINT (r, 2, CONST_DOUBLE)
786 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 3, CONST_DOUBLE)
787
788 /* Link for chain of all CONST_DOUBLEs in use in current function. */
789 #define CONST_DOUBLE_CHAIN(r) XCEXP (r, 1, CONST_DOUBLE)
790 /* The MEM which represents this CONST_DOUBLE's value in memory,
791 or const0_rtx if no MEM has been made for it yet,
792 or cc0_rtx if it is not on the chain. */
793 #define CONST_DOUBLE_MEM(r) XCEXP (r, 0, CONST_DOUBLE)
794
795 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
796 SUBREG_BYTE extracts the byte-number. */
797
798 #define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
799 #define SUBREG_BYTE(RTX) XCUINT(RTX, 1, SUBREG)
800
801 /* in rtlanal.c */
802 extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
803 enum machine_mode,
804 unsigned int,
805 enum machine_mode));
806 extern unsigned int subreg_regno PARAMS ((rtx));
807
808 /* 1 if the REG contained in SUBREG_REG is already known to be
809 sign- or zero-extended from the mode of the SUBREG to the mode of
810 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
811 extension.
812
813 When used as a LHS, is means that this extension must be done
814 when assigning to SUBREG_REG. */
815
816 #define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
817 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
818
819 /* Access various components of an ASM_OPERANDS rtx. */
820
821 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
822 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
823 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
824 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
825 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
826 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
827 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
828 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
829 XCVECEXP ((RTX), 4, (N), ASM_OPERANDS)
830 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
831 XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
832 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
833 GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
834 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
835 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
836
837 /* For a MEM rtx, 1 if it's a volatile reference.
838 Also in an ASM_OPERANDS rtx. */
839 #define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
840
841 /* For a MEM rtx, 1 if it refers to an aggregate, either to the
842 aggregate itself of to a field of the aggregate. If zero, RTX may
843 or may not be such a reference. */
844 #define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
845
846 /* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
847 not refer to a scalar.*/
848 #define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
849
850 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
851 RTX. Otherwise, vice versa. Use this macro only when you are
852 *sure* that you know that the MEM is in a structure, or is a
853 scalar. VAL is evaluated only once. */
854 #define MEM_SET_IN_STRUCT_P(RTX, VAL) do { \
855 if (VAL) \
856 { \
857 MEM_IN_STRUCT_P (RTX) = 1; \
858 MEM_SCALAR_P (RTX) = 0; \
859 } \
860 else \
861 { \
862 MEM_IN_STRUCT_P (RTX) = 0; \
863 MEM_SCALAR_P (RTX) = 1; \
864 } \
865 } while (0)
866
867 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
868 set, and may alias anything. Otherwise, the MEM can only alias
869 MEMs in the same alias set. This value is set in a
870 language-dependent manner in the front-end, and should not be
871 altered in the back-end. These set numbers are tested for zero,
872 and compared for equality; they have no other significance. In
873 some front-ends, these numbers may correspond in some way to types,
874 or other language-level entities, but they need not, and the
875 back-end makes no such assumptions. */
876 #define MEM_ALIAS_SET(RTX) XCWINT(RTX, 1, MEM)
877
878 /* Copy the attributes that apply to memory locations from RHS to LHS. */
879 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
880 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
881 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
882 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
883 MEM_ALIAS_SET (LHS) = MEM_ALIAS_SET (RHS), \
884 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS))
885
886 /* For a LABEL_REF, 1 means that this reference is to a label outside the
887 loop containing the reference. */
888 #define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
889
890 /* For a LABEL_REF, 1 means it is for a nonlocal label. */
891 /* Likewise in an EXPR_LIST for a REG_LABEL note. */
892 #define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
893
894 /* For a CODE_LABEL, 1 means always consider this label to be needed. */
895 #define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
896
897 /* For a REG, 1 means the register is used only in an exit test of a loop. */
898 #define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
899
900 /* During sched, for an insn, 1 means that the insn must be scheduled together
901 with the preceding insn. */
902 #define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
903
904 /* During sched, for the LOG_LINKS of an insn, these cache the adjusted
905 cost of the dependence link. The cost of executing an instruction
906 may vary based on how the results are used. LINK_COST_ZERO is 1 when
907 the cost through the link varies and is unchanged (i.e., the link has
908 zero additional cost). LINK_COST_FREE is 1 when the cost through the
909 link is zero (i.e., the link makes the cost free). In other cases,
910 the adjustment to the cost is recomputed each time it is needed. */
911 #define LINK_COST_ZERO(X) ((X)->jump)
912 #define LINK_COST_FREE(X) ((X)->call)
913
914 /* For a SET rtx, SET_DEST is the place that is set
915 and SET_SRC is the value it is set to. */
916 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
917 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
918
919 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
920 #define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
921 #define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
922
923 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
924 conditionally executing the code on, COND_EXEC_CODE is the code
925 to execute if the condition is true. */
926 #define COND_EXEC_TEST(RTX) XCEXP(RTX, 0, COND_EXEC)
927 #define COND_EXEC_CODE(RTX) XCEXP(RTX, 1, COND_EXEC)
928
929 /* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
930 #define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
931
932 /* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
933 #define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
934
935 /* Flag in a SYMBOL_REF for machine-specific purposes. */
936 #define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
937
938 /* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
939 #define SYMBOL_REF_USED(RTX) ((RTX)->used)
940
941 /* 1 means a SYMBOL_REF is weak. */
942 #define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
943
944 /* Define a macro to look for REG_INC notes,
945 but save time on machines where they never exist. */
946
947 /* Don't continue this line--convex cc version 4.1 would lose. */
948 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
949 #define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
950 #else
951 #define FIND_REG_INC_NOTE(insn, reg) 0
952 #endif
953
954 /* Indicate whether the machine has any sort of auto increment addressing.
955 If not, we can avoid checking for REG_INC notes. */
956
957 /* Don't continue this line--convex cc version 4.1 would lose. */
958 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
959 #define AUTO_INC_DEC
960 #endif
961
962 #ifndef HAVE_PRE_INCREMENT
963 #define HAVE_PRE_INCREMENT 0
964 #endif
965
966 #ifndef HAVE_PRE_DECREMENT
967 #define HAVE_PRE_DECREMENT 0
968 #endif
969
970 #ifndef HAVE_POST_INCREMENT
971 #define HAVE_POST_INCREMENT 0
972 #endif
973
974 #ifndef HAVE_POST_DECREMENT
975 #define HAVE_POST_DECREMENT 0
976 #endif
977
978 #ifndef HAVE_POST_MODIFY_DISP
979 #define HAVE_POST_MODIFY_DISP 0
980 #endif
981
982 #ifndef HAVE_POST_MODIFY_REG
983 #define HAVE_POST_MODIFY_REG 0
984 #endif
985
986 #ifndef HAVE_PRE_MODIFY_DISP
987 #define HAVE_PRE_MODIFY_DISP 0
988 #endif
989
990 #ifndef HAVE_PRE_MODIFY_REG
991 #define HAVE_PRE_MODIFY_REG 0
992 #endif
993
994
995 /* Some architectures do not have complete pre/post increment/decrement
996 instruction sets, or only move some modes efficiently. These macros
997 allow us to tune autoincrement generation. */
998
999 #ifndef USE_LOAD_POST_INCREMENT
1000 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1001 #endif
1002
1003 #ifndef USE_LOAD_POST_DECREMENT
1004 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1005 #endif
1006
1007 #ifndef USE_LOAD_PRE_INCREMENT
1008 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1009 #endif
1010
1011 #ifndef USE_LOAD_PRE_DECREMENT
1012 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1013 #endif
1014
1015 #ifndef USE_STORE_POST_INCREMENT
1016 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1017 #endif
1018
1019 #ifndef USE_STORE_POST_DECREMENT
1020 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1021 #endif
1022
1023 #ifndef USE_STORE_PRE_INCREMENT
1024 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1025 #endif
1026
1027 #ifndef USE_STORE_PRE_DECREMENT
1028 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1029 #endif
1030
1031
1032 /* Accessors for RANGE_INFO. */
1033 /* For RANGE_{START,END} notes return the RANGE_START note. */
1034 #define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
1035
1036 /* For RANGE_{START,END} notes return the RANGE_START note. */
1037 #define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
1038
1039 /* For RANGE_{START,END} notes, return the vector containing the registers used
1040 in the range. */
1041 #define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1042 #define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1043 #define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
1044
1045 /* For RANGE_{START,END} notes, the number of calls within the range. */
1046 #define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
1047
1048 /* For RANGE_{START,END} notes, the number of insns within the range. */
1049 #define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
1050
1051 /* For RANGE_{START,END} notes, a unique # to identify this range. */
1052 #define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
1053
1054 /* For RANGE_{START,END} notes, the basic block # the range starts with. */
1055 #define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
1056
1057 /* For RANGE_{START,END} notes, the basic block # the range ends with. */
1058 #define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
1059
1060 /* For RANGE_{START,END} notes, the loop depth the range is in. */
1061 #define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
1062
1063 /* For RANGE_{START,END} notes, the bitmap of live registers at the start
1064 of the range. */
1065 #define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
1066
1067 /* For RANGE_{START,END} notes, the bitmap of live registers at the end
1068 of the range. */
1069 #define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
1070
1071 /* For RANGE_START notes, the marker # of the start of the range. */
1072 #define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
1073
1074 /* For RANGE_START notes, the marker # of the end of the range. */
1075 #define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
1076
1077 /* Original pseudo register # for a live range note. */
1078 #define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
1079
1080 /* Pseudo register # original register is copied into or -1. */
1081 #define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
1082
1083 /* How many times a register in a live range note was referenced. */
1084 #define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
1085
1086 /* How many times a register in a live range note was set. */
1087 #define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
1088
1089 /* How many times a register in a live range note died. */
1090 #define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
1091
1092 /* Whether the original value is needed to be copied into the range register at
1093 the start of the range. */
1094 #define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
1095
1096 /* # of insns the register copy is live over. */
1097 #define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
1098
1099 /* # of calls the register copy is live over. */
1100 #define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
1101
1102 /* DECL_NODE pointer of the declaration if the register is a user defined
1103 variable. */
1104 #define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
1105
1106 /* BLOCK_NODE pointer to the block the variable is declared in if the
1107 register is a user defined variable. */
1108 #define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
1109
1110 /* EXPR_LIST of the distinct ranges a variable is in. */
1111 #define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1112
1113 /* Block a variable is declared in. */
1114 #define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1115
1116 /* # of distinct ranges a variable is in. */
1117 #define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1118
1119 /* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1120 #define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1121
1122 /* For a NOTE_INSN_LIVE note, the original basic block number. */
1123 #define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
1124
1125 /* Determine if the insn is a PHI node. */
1126 #define PHI_NODE_P(X) \
1127 (X && GET_CODE (X) == INSN \
1128 && GET_CODE (PATTERN (X)) == SET \
1129 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1130 \f
1131 /* Nonzero if we need to distinguish between the return value of this function
1132 and the return value of a function called by this function. This helps
1133 integrate.c.
1134 This is 1 until after the rtl generation pass. */
1135 extern int rtx_equal_function_value_matters;
1136
1137 /* Nonzero when we are generating CONCATs. */
1138 extern int generating_concat_p;
1139
1140 /* Generally useful functions. */
1141
1142 /* In expmed.c */
1143 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
1144
1145 #define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1146
1147 /* In builtins.c */
1148 extern rtx expand_builtin_expect_jump PARAMS ((union tree_node *, rtx, rtx));
1149
1150 /* In explow.c */
1151 extern void set_stack_check_libfunc PARAMS ((rtx));
1152 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
1153 enum machine_mode));
1154 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1155 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1156 extern void optimize_save_area_alloca PARAMS ((rtx));
1157
1158 /* In emit-rtl.c */
1159 extern rtx gen_rtx PARAMS ((enum rtx_code,
1160 enum machine_mode, ...));
1161 extern rtvec gen_rtvec PARAMS ((int, ...));
1162
1163 /* In other files */
1164 extern rtx rtx_alloc PARAMS ((RTX_CODE));
1165 extern rtvec rtvec_alloc PARAMS ((int));
1166 extern rtx copy_insn_1 PARAMS ((rtx));
1167 extern rtx copy_insn PARAMS ((rtx));
1168
1169 /* In rtl.c */
1170 extern rtx copy_rtx PARAMS ((rtx));
1171
1172 /* In emit-rtl.c */
1173 extern rtx copy_rtx_if_shared PARAMS ((rtx));
1174
1175 /* In rtl.c */
1176 extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1177 extern rtx shallow_copy_rtx PARAMS ((rtx));
1178 extern int rtx_equal_p PARAMS ((rtx, rtx));
1179
1180 /* In emit-rtl.c */
1181 extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1182 extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1183 extern rtx gen_label_rtx PARAMS ((void));
1184 extern int subreg_hard_regno PARAMS ((rtx, int));
1185 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1186 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
1187
1188 /* In cse.c */
1189 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
1190
1191 /* In emit-rtl.c */
1192 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1193 extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1194 enum machine_mode, rtx));
1195 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1196 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
1197 extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1198 enum machine_mode));
1199 extern rtx constant_subword PARAMS ((rtx, int,
1200 enum machine_mode));
1201
1202 /* In emit-rtl.c */
1203 extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1204 enum machine_mode));
1205 extern int subreg_lowpart_p PARAMS ((rtx));
1206 extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1207 enum machine_mode));
1208 extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1209 enum machine_mode));
1210 extern rtx make_safe_from PARAMS ((rtx, rtx));
1211 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
1212 extern rtx get_insns PARAMS ((void));
1213 extern const char *get_insn_name PARAMS ((int));
1214 extern rtx get_last_insn PARAMS ((void));
1215 extern rtx get_last_insn_anywhere PARAMS ((void));
1216 extern void start_sequence PARAMS ((void));
1217 extern void push_to_sequence PARAMS ((rtx));
1218 extern void end_sequence PARAMS ((void));
1219 extern void push_to_full_sequence PARAMS ((rtx, rtx));
1220 extern void end_full_sequence PARAMS ((rtx*, rtx*));
1221 extern rtx gen_sequence PARAMS ((void));
1222
1223 /* In varasm.c */
1224 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1225 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
1226
1227 /* In varasm.c */
1228 extern rtx get_pool_constant PARAMS ((rtx));
1229 extern enum machine_mode get_pool_mode PARAMS ((rtx));
1230 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1231 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1232 extern int get_pool_offset PARAMS ((rtx));
1233 extern rtx simplify_subtraction PARAMS ((rtx));
1234
1235 /* In function.c */
1236 extern rtx assign_stack_local PARAMS ((enum machine_mode,
1237 HOST_WIDE_INT, int));
1238 extern rtx assign_stack_temp PARAMS ((enum machine_mode,
1239 HOST_WIDE_INT, int));
1240 extern rtx assign_temp PARAMS ((union tree_node *,
1241 int, int, int));
1242 /* In emit-rtl.c */
1243 extern rtx emit_insn_before PARAMS ((rtx, rtx));
1244 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1245 extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1246 extern rtx emit_barrier_before PARAMS ((rtx));
1247 extern rtx emit_label_before PARAMS ((rtx, rtx));
1248 extern rtx emit_note_before PARAMS ((int, rtx));
1249 extern rtx emit_insn_after PARAMS ((rtx, rtx));
1250 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1251 extern rtx emit_barrier_after PARAMS ((rtx));
1252 extern rtx emit_label_after PARAMS ((rtx, rtx));
1253 extern rtx emit_note_after PARAMS ((int, rtx));
1254 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
1255 extern rtx emit_insn PARAMS ((rtx));
1256 extern rtx emit_insns PARAMS ((rtx));
1257 extern rtx emit_insns_before PARAMS ((rtx, rtx));
1258 extern rtx emit_insns_after PARAMS ((rtx, rtx));
1259 extern rtx emit_jump_insn PARAMS ((rtx));
1260 extern rtx emit_call_insn PARAMS ((rtx));
1261 extern rtx emit_label PARAMS ((rtx));
1262 extern rtx emit_barrier PARAMS ((void));
1263 extern rtx emit_line_note PARAMS ((const char *, int));
1264 extern rtx emit_note PARAMS ((const char *, int));
1265 extern rtx emit_line_note_force PARAMS ((const char *, int));
1266 extern rtx make_insn_raw PARAMS ((rtx));
1267 extern rtx previous_insn PARAMS ((rtx));
1268 extern rtx next_insn PARAMS ((rtx));
1269 extern rtx prev_nonnote_insn PARAMS ((rtx));
1270 extern rtx next_nonnote_insn PARAMS ((rtx));
1271 extern rtx prev_real_insn PARAMS ((rtx));
1272 extern rtx next_real_insn PARAMS ((rtx));
1273 extern rtx prev_active_insn PARAMS ((rtx));
1274 extern rtx next_active_insn PARAMS ((rtx));
1275 extern int active_insn_p PARAMS ((rtx));
1276 extern rtx prev_label PARAMS ((rtx));
1277 extern rtx next_label PARAMS ((rtx));
1278 extern rtx next_cc0_user PARAMS ((rtx));
1279 extern rtx prev_cc0_setter PARAMS ((rtx));
1280
1281 /* In jump.c */
1282 extern rtx next_nondeleted_insn PARAMS ((rtx));
1283 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
1284 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
1285 extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1286 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1287 extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1288 extern void mark_jump_label PARAMS ((rtx, rtx, int));
1289
1290 /* In jump.c */
1291 extern rtx squeeze_notes PARAMS ((rtx, rtx));
1292 extern rtx delete_insn PARAMS ((rtx));
1293 extern void delete_jump PARAMS ((rtx));
1294 extern void delete_barrier PARAMS ((rtx));
1295 extern rtx get_label_before PARAMS ((rtx));
1296 extern rtx get_label_after PARAMS ((rtx));
1297 extern rtx follow_jumps PARAMS ((rtx));
1298
1299 /* In recog.c */
1300 extern rtx *find_constant_term_loc PARAMS ((rtx *));
1301
1302 /* In emit-rtl.c */
1303 extern rtx try_split PARAMS ((rtx, rtx, int));
1304
1305 /* In unknown file */
1306 extern rtx split_insns PARAMS ((rtx, rtx));
1307
1308 /* In simplify-rtx.c */
1309 extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1310 enum machine_mode, rtx,
1311 enum machine_mode));
1312 extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1313 enum machine_mode, rtx,
1314 rtx));
1315 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1316 enum machine_mode,
1317 enum machine_mode, rtx, rtx,
1318 rtx));
1319 extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1320 enum machine_mode, rtx,
1321 rtx));
1322 extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1323 enum machine_mode,
1324 rtx, rtx));
1325 extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1326 enum machine_mode, rtx,
1327 enum machine_mode));
1328 extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1329 enum machine_mode,
1330 enum machine_mode,
1331 rtx, rtx, rtx));
1332 extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
1333 enum machine_mode,
1334 enum machine_mode,
1335 rtx, rtx));
1336 extern rtx simplify_subreg PARAMS ((enum machine_mode,
1337 rtx,
1338 enum machine_mode,
1339 unsigned int));
1340 extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1341 rtx,
1342 enum machine_mode,
1343 unsigned int));
1344 extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
1345 extern rtx simplify_rtx PARAMS ((rtx));
1346
1347 /* In function.c */
1348 extern rtx gen_mem_addressof PARAMS ((rtx, union tree_node *));
1349
1350 /* In regclass.c */
1351 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1352 unsigned int));
1353
1354 /* In emit-rtl.c */
1355 extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
1356
1357 /* Functions in rtlanal.c */
1358
1359 /* Single set is implemented as macro for performance reasons. */
1360 #define single_set(I) (INSN_P (I) \
1361 ? (GET_CODE (PATTERN (I)) == SET \
1362 ? PATTERN (I) : single_set_1 (I)) \
1363 : NULL_RTX)
1364 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1365
1366 extern int rtx_addr_can_trap_p PARAMS ((rtx));
1367 extern int rtx_unstable_p PARAMS ((rtx));
1368 extern int rtx_varies_p PARAMS ((rtx, int));
1369 extern int rtx_addr_varies_p PARAMS ((rtx, int));
1370 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1371 extern rtx get_related_value PARAMS ((rtx));
1372 extern int reg_mentioned_p PARAMS ((rtx, rtx));
1373 extern int count_occurrences PARAMS ((rtx, rtx, int));
1374 extern int reg_referenced_p PARAMS ((rtx, rtx));
1375 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1376 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1377 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1378 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
1379 extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
1380 extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1381 extern int no_labels_between_p PARAMS ((rtx, rtx));
1382 extern int no_jumps_between_p PARAMS ((rtx, rtx));
1383 extern int modified_in_p PARAMS ((rtx, rtx));
1384 extern int insn_dependent_p PARAMS ((rtx, rtx));
1385 extern int reg_set_p PARAMS ((rtx, rtx));
1386 extern rtx single_set_2 PARAMS ((rtx, rtx));
1387 extern int multiple_sets PARAMS ((rtx));
1388 extern int set_noop_p PARAMS ((rtx));
1389 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
1390 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1391 rtx, rtx *));
1392 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
1393 extern rtx set_of PARAMS ((rtx, rtx));
1394 extern void note_stores PARAMS ((rtx,
1395 void (*) (rtx, rtx, void *),
1396 void *));
1397 extern void note_uses PARAMS ((rtx *,
1398 void (*) (rtx *, void *),
1399 void *));
1400 extern rtx reg_set_last PARAMS ((rtx, rtx));
1401 extern int dead_or_set_p PARAMS ((rtx, rtx));
1402 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
1403 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
1404 extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1405 unsigned int));
1406 extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
1407 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
1408 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1409 unsigned int));
1410 extern void remove_note PARAMS ((rtx, rtx));
1411 extern int side_effects_p PARAMS ((rtx));
1412 extern int volatile_refs_p PARAMS ((rtx));
1413 extern int volatile_insn_p PARAMS ((rtx));
1414 extern int may_trap_p PARAMS ((rtx));
1415 extern int inequality_comparisons_p PARAMS ((rtx));
1416 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
1417 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1418 int));
1419 extern int computed_jump_p PARAMS ((rtx));
1420 typedef int (*rtx_function) PARAMS ((rtx *, void *));
1421 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
1422 extern rtx regno_use_in PARAMS ((unsigned int, rtx));
1423 extern int auto_inc_p PARAMS ((rtx));
1424 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1425 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
1426 extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
1427
1428 /* flow.c */
1429
1430 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1431 void init_EXPR_INSN_LIST_cache PARAMS ((void));
1432 void free_EXPR_LIST_list PARAMS ((rtx *));
1433 void free_INSN_LIST_list PARAMS ((rtx *));
1434 void free_EXPR_LIST_node PARAMS ((rtx));
1435 void free_INSN_LIST_node PARAMS ((rtx));
1436 rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1437 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
1438 void clear_log_links PARAMS ((rtx));
1439
1440 /* regclass.c */
1441
1442 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1443 Always at least 3, since the combiner could put that many togetherm
1444 and we want this to remain correct for all the remaining passes. */
1445
1446 extern int max_parallel;
1447
1448 /* Free up register info memory. */
1449 extern void free_reg_info PARAMS ((void));
1450
1451 /* recog.c */
1452 extern int asm_noperands PARAMS ((rtx));
1453 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
1454 const char **,
1455 enum machine_mode *));
1456
1457 extern enum reg_class reg_preferred_class PARAMS ((int));
1458 extern enum reg_class reg_alternate_class PARAMS ((int));
1459
1460 extern rtx get_first_nonparm_insn PARAMS ((void));
1461
1462 extern void split_all_insns PARAMS ((int));
1463
1464 #define MAX_SAVED_CONST_INT 64
1465 extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1466
1467 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1468 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1469 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1470 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1471 extern rtx const_true_rtx;
1472
1473 extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1474
1475 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1476 same as VOIDmode. */
1477
1478 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1479
1480 /* Likewise, for the constants 1 and 2. */
1481
1482 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1483 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1484
1485 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1486 is used to represent the frame pointer. This is because the
1487 hard frame pointer and the automatic variables are separated by an amount
1488 that cannot be determined until after register allocation. We can assume
1489 that in this case ELIMINABLE_REGS will be defined, one action of which
1490 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1491 #ifndef HARD_FRAME_POINTER_REGNUM
1492 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1493 #endif
1494
1495 /* Index labels for global_rtl. */
1496 enum global_rtl_index
1497 {
1498 GR_PC,
1499 GR_CC0,
1500 GR_STACK_POINTER,
1501 GR_FRAME_POINTER,
1502 /* For register elimination to work properly these hard_frame_pointer_rtx,
1503 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1504 the same register. */
1505 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1506 GR_ARG_POINTER = GR_FRAME_POINTER,
1507 #endif
1508 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1509 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1510 #else
1511 GR_HARD_FRAME_POINTER,
1512 #endif
1513 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1514 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1515 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1516 #else
1517 GR_ARG_POINTER,
1518 #endif
1519 #endif
1520 GR_VIRTUAL_INCOMING_ARGS,
1521 GR_VIRTUAL_STACK_ARGS,
1522 GR_VIRTUAL_STACK_DYNAMIC,
1523 GR_VIRTUAL_OUTGOING_ARGS,
1524 GR_VIRTUAL_CFA,
1525
1526 GR_MAX
1527 };
1528
1529 /* Pointers to standard pieces of rtx are stored here. */
1530 extern rtx global_rtl[GR_MAX];
1531
1532 /* Standard pieces of rtx, to be substituted directly into things. */
1533 #define pc_rtx (global_rtl[GR_PC])
1534 #define cc0_rtx (global_rtl[GR_CC0])
1535
1536 /* All references to certain hard regs, except those created
1537 by allocating pseudo regs into them (when that's possible),
1538 go through these unique rtx objects. */
1539 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1540 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1541 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1542 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1543
1544 extern rtx pic_offset_table_rtx;
1545 extern rtx struct_value_rtx;
1546 extern rtx struct_value_incoming_rtx;
1547 extern rtx static_chain_rtx;
1548 extern rtx static_chain_incoming_rtx;
1549 extern rtx return_address_pointer_rtx;
1550
1551 /* Include the RTL generation functions. */
1552
1553 #ifndef NO_GENRTL_H
1554 #include "genrtl.h"
1555 #endif
1556
1557 /* There are some RTL codes that require special attention; the
1558 generation functions included above do the raw handling. If you
1559 add to this list, modify special_rtx in gengenrtl.c as well. You
1560 should also modify gen_rtx to use the special function. */
1561
1562 extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
1563 HOST_WIDE_INT, HOST_WIDE_INT));
1564 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
1565 extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
1566 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
1567 extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
1568 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
1569
1570 extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1571
1572 /* We need the cast here to ensure that we get the same result both with
1573 and without prototypes. */
1574 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1575
1576 /* Virtual registers are used during RTL generation to refer to locations into
1577 the stack frame when the actual location isn't known until RTL generation
1578 is complete. The routine instantiate_virtual_regs replaces these with
1579 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1580 a constant. */
1581
1582 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1583
1584 /* This points to the first word of the incoming arguments passed on the stack,
1585 either by the caller or by the callee when pretending it was passed by the
1586 caller. */
1587
1588 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1589
1590 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1591
1592 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1593 variable on the stack. Otherwise, it points to the first variable on
1594 the stack. */
1595
1596 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1597
1598 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1599
1600 /* This points to the location of dynamically-allocated memory on the stack
1601 immediately after the stack pointer has been adjusted by the amount
1602 desired. */
1603
1604 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1605
1606 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1607
1608 /* This points to the location in the stack at which outgoing arguments should
1609 be written when the stack is pre-pushed (arguments pushed using push
1610 insns always use sp). */
1611
1612 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1613
1614 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1615
1616 /* This points to the Canonical Frame Address of the function. This
1617 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1618 but is calculated relative to the arg pointer for simplicity; the
1619 frame pointer nor stack pointer are necessarily fixed relative to
1620 the CFA until after reload. */
1621
1622 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1623
1624 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1625
1626 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1627
1628 /* REGNUM never really appearing in the INSN stream. */
1629 #define INVALID_REGNUM (~(unsigned int)0)
1630
1631 extern rtx find_next_ref PARAMS ((rtx, rtx));
1632
1633 extern rtx output_constant_def PARAMS ((union tree_node *, int));
1634 extern rtx immed_real_const PARAMS ((union tree_node *));
1635
1636 /* Define a default value for STORE_FLAG_VALUE. */
1637
1638 #ifndef STORE_FLAG_VALUE
1639 #define STORE_FLAG_VALUE 1
1640 #endif
1641
1642 /* Nonzero after the second flow pass has completed.
1643 Set to 1 or 0 by toplev.c */
1644 extern int flow2_completed;
1645
1646 /* Nonzero after end of reload pass.
1647 Set to 1 or 0 by reload1.c. */
1648
1649 extern int reload_completed;
1650
1651 /* Set to 1 while reload_as_needed is operating.
1652 Required by some machines to handle any generated moves differently. */
1653
1654 extern int reload_in_progress;
1655
1656 /* If this is nonzero, we do not bother generating VOLATILE
1657 around volatile memory references, and we are willing to
1658 output indirect addresses. If cse is to follow, we reject
1659 indirect addresses so a useful potential cse is generated;
1660 if it is used only once, instruction combination will produce
1661 the same indirect address eventually. */
1662 extern int cse_not_expected;
1663
1664 /* Set to nonzero before life analysis to indicate that it is unsafe to
1665 generate any new pseudo registers. */
1666 extern int no_new_pseudos;
1667
1668 /* Translates rtx code to tree code, for those codes needed by
1669 REAL_ARITHMETIC. The function returns an int because the caller may not
1670 know what `enum tree_code' means. */
1671
1672 extern int rtx_to_tree_code PARAMS ((enum rtx_code));
1673
1674 /* In tree.c */
1675 struct obstack;
1676 extern void gcc_obstack_init PARAMS ((struct obstack *));
1677
1678 /* In cse.c */
1679 struct cse_basic_block_data;
1680
1681 /* Return the right cost to give to an operation
1682 to make the cost of the corresponding register-to-register instruction
1683 N times that of a fast register-to-register instruction. */
1684 #define COSTS_N_INSNS(N) ((N) * 4)
1685
1686 /* Maximum cost of a rtl expression. This value has the special meaning
1687 not to use an rtx with this cost under any circumstances. */
1688 #define MAX_COST INT_MAX
1689
1690 extern int rtx_cost PARAMS ((rtx, enum rtx_code));
1691 extern int address_cost PARAMS ((rtx, enum machine_mode));
1692 extern void delete_trivially_dead_insns PARAMS ((rtx, int));
1693 #ifdef BUFSIZ
1694 extern int cse_main PARAMS ((rtx, int, int, FILE *));
1695 #endif
1696 extern void cse_end_of_basic_block PARAMS ((rtx,
1697 struct cse_basic_block_data *,
1698 int, int, int));
1699
1700 /* In jump.c */
1701 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1702 extern int condjump_p PARAMS ((rtx));
1703 extern int any_condjump_p PARAMS ((rtx));
1704 extern int any_uncondjump_p PARAMS ((rtx));
1705 extern int safe_to_remove_jump_p PARAMS ((rtx));
1706 extern rtx pc_set PARAMS ((rtx));
1707 extern rtx condjump_label PARAMS ((rtx));
1708 extern int simplejump_p PARAMS ((rtx));
1709 extern int returnjump_p PARAMS ((rtx));
1710 extern int onlyjump_p PARAMS ((rtx));
1711 extern int sets_cc0_p PARAMS ((rtx));
1712 extern int invert_jump_1 PARAMS ((rtx, rtx));
1713 extern int invert_jump PARAMS ((rtx, rtx, int));
1714 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1715 extern int true_regnum PARAMS ((rtx));
1716 extern int redirect_jump_1 PARAMS ((rtx, rtx));
1717 extern int redirect_jump PARAMS ((rtx, rtx, int));
1718 extern void jump_optimize PARAMS ((rtx, int, int));
1719 extern void jump_optimize_minimal PARAMS ((rtx));
1720 extern void rebuild_jump_labels PARAMS ((rtx));
1721 extern void thread_jumps PARAMS ((rtx, int, int));
1722 extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
1723 extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
1724 extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1725 extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1726 rtx, rtx, rtx));
1727 extern void delete_for_peephole PARAMS ((rtx, rtx));
1728 extern int condjump_in_parallel_p PARAMS ((rtx));
1729 extern void never_reached_warning PARAMS ((rtx));
1730
1731 /* Flags for jump_optimize() */
1732 #define JUMP_NOOP_MOVES 1
1733 #define JUMP_AFTER_REGSCAN 1
1734
1735 /* In emit-rtl.c. */
1736 extern int max_reg_num PARAMS ((void));
1737 extern int max_label_num PARAMS ((void));
1738 extern int get_first_label_num PARAMS ((void));
1739 extern void delete_insns_since PARAMS ((rtx));
1740 extern void mark_reg_pointer PARAMS ((rtx, int));
1741 extern void mark_user_reg PARAMS ((rtx));
1742 extern void reset_used_flags PARAMS ((rtx));
1743 extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1744 extern int get_max_uid PARAMS ((void));
1745 extern int in_sequence_p PARAMS ((void));
1746 extern void force_next_line_note PARAMS ((void));
1747 extern void clear_emit_caches PARAMS ((void));
1748 extern void init_emit PARAMS ((void));
1749 extern void init_emit_once PARAMS ((int));
1750 extern void push_topmost_sequence PARAMS ((void));
1751 extern void pop_topmost_sequence PARAMS ((void));
1752 extern int subreg_realpart_p PARAMS ((rtx));
1753 extern void reverse_comparison PARAMS ((rtx));
1754 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1755 extern void set_new_first_and_last_label_num PARAMS ((int, int));
1756 extern void set_new_last_label_num PARAMS ((int));
1757 extern void unshare_all_rtl_again PARAMS ((rtx));
1758 extern void set_last_insn PARAMS ((rtx));
1759 extern void link_cc0_insns PARAMS ((rtx));
1760 extern void add_insn PARAMS ((rtx));
1761 extern void add_insn_before PARAMS ((rtx, rtx));
1762 extern void add_insn_after PARAMS ((rtx, rtx));
1763 extern void remove_insn PARAMS ((rtx));
1764 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1765 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1766 extern enum rtx_code classify_insn PARAMS ((rtx));
1767 extern rtx emit PARAMS ((rtx));
1768 /* Query and clear/ restore no_line_numbers. This is used by the
1769 switch / case handling in stmt.c to give proper line numbers in
1770 warnings about unreachable code. */
1771 int force_line_numbers PARAMS ((void));
1772 void restore_line_number_status PARAMS ((int old_value));
1773 extern void renumber_insns PARAMS ((FILE *));
1774 extern void remove_unnecessary_notes PARAMS ((void));
1775
1776 /* In combine.c */
1777 extern int combine_instructions PARAMS ((rtx, unsigned int));
1778 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1779 extern rtx remove_death PARAMS ((unsigned int, rtx));
1780 #ifdef BUFSIZ
1781 extern void dump_combine_stats PARAMS ((FILE *));
1782 extern void dump_combine_total_stats PARAMS ((FILE *));
1783 #endif
1784
1785 /* In sched.c. */
1786 #ifdef BUFSIZ
1787 extern void schedule_insns PARAMS ((FILE *));
1788 extern void schedule_ebbs PARAMS ((FILE *));
1789 #endif
1790 extern void fix_sched_param PARAMS ((const char *, const char *));
1791
1792 /* In print-rtl.c */
1793 extern const char *print_rtx_head;
1794 extern void debug_rtx PARAMS ((rtx));
1795 extern void debug_rtx_list PARAMS ((rtx, int));
1796 extern void debug_rtx_range PARAMS ((rtx, rtx));
1797 extern rtx debug_rtx_find PARAMS ((rtx, int));
1798 #ifdef BUFSIZ
1799 extern void print_rtl PARAMS ((FILE *, rtx));
1800 extern void print_simple_rtl PARAMS ((FILE *, rtx));
1801 extern int print_rtl_single PARAMS ((FILE *, rtx));
1802 extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
1803 #endif
1804
1805 /* In loop.c */
1806 extern void init_loop PARAMS ((void));
1807 extern rtx libcall_other_reg PARAMS ((rtx, rtx));
1808 #ifdef BUFSIZ
1809 extern void loop_optimize PARAMS ((rtx, FILE *, int));
1810 #endif
1811 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
1812
1813 /* In function.c */
1814 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1815 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1816 extern int prologue_epilogue_contains PARAMS ((rtx));
1817 extern int sibcall_epilogue_contains PARAMS ((rtx));
1818 extern void preserve_rtl_expr_result PARAMS ((rtx));
1819 extern void mark_temp_addr_taken PARAMS ((rtx));
1820 extern void update_temp_slot_address PARAMS ((rtx, rtx));
1821 extern void purge_addressof PARAMS ((rtx));
1822 extern void purge_hard_subreg_sets PARAMS ((rtx));
1823
1824 /* In stmt.c */
1825 extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
1826 extern void expand_null_return PARAMS ((void));
1827 extern void emit_jump PARAMS ((rtx));
1828 extern int preserve_subexpressions_p PARAMS ((void));
1829
1830 /* In expr.c */
1831 extern void move_by_pieces PARAMS ((rtx, rtx,
1832 unsigned HOST_WIDE_INT,
1833 unsigned int));
1834
1835 /* In flow.c */
1836 extern void recompute_reg_usage PARAMS ((rtx, int));
1837 #ifdef BUFSIZ
1838 extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1839 extern void dump_flow_info PARAMS ((FILE *));
1840 #endif
1841
1842 /* In expmed.c */
1843 extern void init_expmed PARAMS ((void));
1844 extern void expand_inc PARAMS ((rtx, rtx));
1845 extern void expand_dec PARAMS ((rtx, rtx));
1846 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
1847 unsigned HOST_WIDE_INT, rtx,
1848 int, int));
1849
1850 /* In gcse.c */
1851 #ifdef BUFSIZ
1852 extern int gcse_main PARAMS ((rtx, FILE *));
1853 #endif
1854
1855 /* In global.c */
1856 extern void mark_elimination PARAMS ((int, int));
1857 #ifdef BUFSIZ
1858 extern int global_alloc PARAMS ((FILE *));
1859 extern void dump_global_regs PARAMS ((FILE *));
1860 #endif
1861 #ifdef HARD_CONST
1862 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
1863 #endif
1864 extern void build_insn_chain PARAMS ((rtx));
1865
1866 /* In regclass.c */
1867 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1868 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1869 extern void globalize_reg PARAMS ((int));
1870 extern void init_regs PARAMS ((void));
1871 extern void init_reg_sets PARAMS ((void));
1872 extern void regset_release_memory PARAMS ((void));
1873 extern void regclass_init PARAMS ((void));
1874 extern void regclass PARAMS ((rtx, int, FILE *));
1875 extern void reg_scan PARAMS ((rtx, unsigned int, int));
1876 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
1877 extern void fix_register PARAMS ((const char *, int, int));
1878
1879 extern void delete_null_pointer_checks PARAMS ((rtx));
1880
1881 /* In regmove.c */
1882 #ifdef BUFSIZ
1883 extern void regmove_optimize PARAMS ((rtx, int, FILE *));
1884 #endif
1885 extern void combine_stack_adjustments PARAMS ((void));
1886
1887 /* In reorg.c */
1888 #ifdef BUFSIZ
1889 extern void dbr_schedule PARAMS ((rtx, FILE *));
1890 #endif
1891
1892 /* In local-alloc.c */
1893 #ifdef BUFSIZ
1894 extern void dump_local_alloc PARAMS ((FILE *));
1895 #endif
1896 extern int local_alloc PARAMS ((void));
1897 extern int function_invariant_p PARAMS ((rtx));
1898
1899 /* In profile.c */
1900 extern void init_branch_prob PARAMS ((const char *));
1901 extern void branch_prob PARAMS ((void));
1902 extern void end_branch_prob PARAMS ((void));
1903 extern void output_func_start_profiler PARAMS ((void));
1904
1905 /* In reg-stack.c */
1906 #ifdef BUFSIZ
1907 extern void reg_to_stack PARAMS ((rtx, FILE *));
1908 #endif
1909
1910 /* In fold-const.c */
1911 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1912 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1913 unsigned HOST_WIDE_INT *,
1914 HOST_WIDE_INT *));
1915 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1916 unsigned HOST_WIDE_INT *,
1917 HOST_WIDE_INT *));
1918 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1919 HOST_WIDE_INT,
1920 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1921 unsigned HOST_WIDE_INT *,
1922 HOST_WIDE_INT *));
1923 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1924 HOST_WIDE_INT, unsigned int,
1925 unsigned HOST_WIDE_INT *,
1926 HOST_WIDE_INT *, int));
1927 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1928 HOST_WIDE_INT, unsigned int,
1929 unsigned HOST_WIDE_INT *,
1930 HOST_WIDE_INT *, int));
1931 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1932 HOST_WIDE_INT, unsigned int,
1933 unsigned HOST_WIDE_INT *,
1934 HOST_WIDE_INT *));
1935 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1936 HOST_WIDE_INT, unsigned int,
1937 unsigned HOST_WIDE_INT *,
1938 HOST_WIDE_INT *));
1939
1940 /* In calls.c */
1941 enum libcall_type
1942 {
1943 LCT_NORMAL = 0,
1944 LCT_CONST = 1,
1945 LCT_PURE = 2,
1946 LCT_CONST_MAKE_BLOCK = 3,
1947 LCT_PURE_MAKE_BLOCK = 4,
1948 LCT_NORETURN = 5,
1949 LCT_THROW = 6
1950 };
1951
1952 extern void emit_library_call PARAMS ((rtx, enum libcall_type,
1953 enum machine_mode, int,
1954 ...));
1955 extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
1956 enum machine_mode, int,
1957 ...));
1958
1959 /* In unroll.c */
1960 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
1961
1962 /* In varasm.c */
1963 extern int in_data_section PARAMS ((void));
1964 extern void init_varasm_once PARAMS ((void));
1965
1966 /* In rtl.c */
1967 extern void init_rtl PARAMS ((void));
1968 extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
1969 void *));
1970 struct md_constant { char *name, *value; };
1971
1972 #ifdef BUFSIZ
1973 extern int read_skip_spaces PARAMS ((FILE *));
1974 extern rtx read_rtx PARAMS ((FILE *));
1975 #endif
1976
1977 extern const char *read_rtx_filename;
1978 extern int read_rtx_lineno;
1979
1980 /* Redefine abort to report an internal error w/o coredump, and
1981 reporting the location of the error in the source file. This logic
1982 is duplicated in rtl.h and tree.h because every file that needs the
1983 special abort includes one or both. toplev.h gets too few files,
1984 system.h gets too many. */
1985
1986 extern void fancy_abort PARAMS ((const char *, int, const char *))
1987 ATTRIBUTE_NORETURN;
1988 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
1989
1990 /* In alias.c */
1991 extern rtx canon_rtx PARAMS ((rtx));
1992 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
1993 int (*)(rtx, int)));
1994 extern rtx get_addr PARAMS ((rtx));
1995 extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
1996 rtx, int (*)(rtx, int)));
1997 extern int read_dependence PARAMS ((rtx, rtx));
1998 extern int anti_dependence PARAMS ((rtx, rtx));
1999 extern int output_dependence PARAMS ((rtx, rtx));
2000 extern void mark_constant_function PARAMS ((void));
2001 extern void init_alias_once PARAMS ((void));
2002 extern void init_alias_analysis PARAMS ((void));
2003 extern void end_alias_analysis PARAMS ((void));
2004 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
2005 extern void set_mem_alias_set PARAMS ((rtx, HOST_WIDE_INT));
2006
2007 /* In sibcall.c */
2008 typedef enum {
2009 sibcall_use_normal = 1,
2010 sibcall_use_tail_recursion,
2011 sibcall_use_sibcall
2012 } sibcall_use_t;
2013
2014 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2015 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2016
2017 #ifdef STACK_REGS
2018 extern int stack_regs_mentioned PARAMS ((rtx insn));
2019 #endif
2020
2021 /* In toplev.c */
2022 extern rtx stack_limit_rtx;
2023
2024 /* In regrename.c */
2025 extern void regrename_optimize PARAMS ((void));
2026
2027 /* In ifcvt.c */
2028 extern void if_convert PARAMS ((int));
2029
2030 /* In predict.c */
2031 extern void invert_br_probabilities PARAMS ((rtx));
2032 #endif /* ! GCC_RTL_H */