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predict.c: Fix formatting.
[thirdparty/gcc.git] / gcc / rtl.h
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6f29feb1 1/* Register Transfer Language (RTL) definitions for GNU C-Compiler
af841dbd 2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
f52eda29 3 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
6f29feb1 4
1322177d 5This file is part of GCC.
6f29feb1 6
1322177d
LB		 7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
6f29feb1 11
1322177d
LB		 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
6f29feb1
JW		 16
17You should have received a copy of the GNU General Public License
1322177d
LB		 18along with GCC; see the file COPYING. If not, write to the Free
19Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2002111-1307, USA. */
6f29feb1 21
88657302
RH		 22#ifndef GCC_RTL_H
23#define GCC_RTL_H
6f29feb1 24
36edd3cc
BS		 25struct function;
26
6f29feb1
JW		 27#include "machmode.h"
28
29#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
1cfc3092 30#undef FLOAT /* Likewise. */
ac889e46 31#undef ABS /* Likewise. */
71ae9cc6 32#undef PC /* Likewise. */
6f29feb1 33
173b24b9 34/* Value used by some passes to "recognize" noop moves as valid
eebedaa5 35 instructions. */
b5832b43
JH		 36#define NOOP_MOVE_INSN_CODE INT_MAX
37
6f29feb1
JW		 38/* Register Transfer Language EXPRESSIONS CODES */
39
40#define RTX_CODE enum rtx_code
41enum 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
6dc42e49 47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
6f29feb1 48 NUM_RTX_CODE.
6dc42e49 49 Assumes default enum value assignment. */
6f29feb1 50
cf403648 51#define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
6f29feb1
JW		 52 /* The cast here, saves many elsewhere. */
53
86460bab 54extern const unsigned char rtx_length[NUM_RTX_CODE];
0f41302f 55#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
6f29feb1 56
86460bab 57extern const char * const rtx_name[NUM_RTX_CODE];
0f41302f 58#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
6f29feb1 59
86460bab 60extern const char * const rtx_format[NUM_RTX_CODE];
0f41302f 61#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
6f29feb1 62
86460bab 63extern const char rtx_class[NUM_RTX_CODE];
0f41302f 64#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
6f29feb1 65\f
33f7f353
JR		 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. */
68typedef 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. */
173b24b9
RK		 74 unsigned min_after_vec: 1; /* minimum address target label is
75 after the ADDR_DIFF_VEC. */
76 unsigned max_after_vec: 1; /* maximum address target label is
77 after the ADDR_DIFF_VEC. */
78 unsigned min_after_base: 1; /* minimum address target label is
79 after BASE. */
80 unsigned max_after_base: 1; /* maximum address target label is
81 after BASE. */
33f7f353
JR		 82 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
83 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
84 unsigned : 2;
85 unsigned scale : 8;
86} addr_diff_vec_flags;
87
173b24b9
RK		 88/* Structure used to describe the attributes of a MEM. These are hashed
89 so MEMs that the same attributes share a data structure. This means
90 they cannot be modified in place. If any element is nonzero, it means
91 the value of the corresponding attribute is unknown. */
92typedef struct
93{
eebedaa5 94 HOST_WIDE_INT alias; /* Memory alias set. */
998d7deb 95 tree expr; /* expr corresponding to MEM. */
eebedaa5 96 rtx offset; /* Offset from start of DECL, as CONST_INT. */
173b24b9 97 rtx size; /* Size in bytes, as a CONST_INT. */
d022d93e 98 unsigned int align; /* Alignment of MEM in bits. */
173b24b9
RK		 99} mem_attrs;
100
6f29feb1
JW		 101/* Common union for an element of an rtx. */
102
103typedef union rtunion_def
104{
5f4f0e22 105 HOST_WIDE_INT rtwint;
6f29feb1 106 int rtint;
770ae6cc 107 unsigned int rtuint;
3cce094d 108 const char *rtstr;
2f78c311
ZW		 109 rtx rtx;
110 rtvec rtvec;
6f29feb1 111 enum machine_mode rttype;
33f7f353 112 addr_diff_vec_flags rt_addr_diff_vec_flags;
eab5c70a 113 struct cselib_val_struct *rt_cselib;
0dfa1860 114 struct bitmap_head_def *rtbit;
2f78c311 115 tree rttree;
e881bb1b 116 struct basic_block_def *bb;
173b24b9 117 mem_attrs *rtmem;
6f29feb1
JW		 118} rtunion;
119
120/* RTL expression ("rtx"). */
121
2f78c311 122struct rtx_def
6f29feb1 123{
6f29feb1 124 /* The kind of expression this is. */
c149cc37 125 ENUM_BITFIELD(rtx_code) code: 16;
18def38f 126
6f29feb1 127 /* The kind of value the expression has. */
c149cc37
RL		 128 ENUM_BITFIELD(machine_mode) mode : 8;
129
0a1c58a2 130 /* 1 in an INSN if it can alter flow of control
b8ec5764 131 within this function.
10b76d73 132 MEM_KEEP_ALIAS_SET_P in a MEM.
3258e996
RK		 133 LINK_COST_ZERO in an INSN_LIST.
134 SET_IS_RETURN_P in a SET. */
6f29feb1 135 unsigned int jump : 1;
b8ec5764
VM		 136 /* 1 in an INSN if it can call another function.
137 LINK_COST_FREE in an INSN_LIST. */
6f29feb1 138 unsigned int call : 1;
49982682
JW		 139 /* 1 in a REG if value of this expression will never change during
140 the current function, even though it is not manifestly constant.
141 1 in a MEM if contents of memory are constant. This does not
142 necessarily mean that the value of this expression is constant.
07be3989 143 1 in a SUBREG if it is from a promoted variable that is unsigned.
6f29feb1
JW		 144 1 in a SYMBOL_REF if it addresses something in the per-function
145 constants pool.
146 1 in a CALL_INSN if it is a const call.
147 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
148 reorg until end of compilation; cleared before used. */
149 unsigned int unchanging : 1;
150 /* 1 in a MEM expression if contents of memory are volatile.
151 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
152 if it is deleted.
153 1 in a REG expression if corresponds to a variable declared by the user.
154 0 for an internally generated temporary.
2a406d2a
RS		 155 In a SYMBOL_REF, this flag is used for machine-specific purposes.
156 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
6f29feb1 157 unsigned int volatil : 1;
8358a974 158 /* 1 in a MEM referring to a field of an aggregate.
6f29feb1
JW		 159 0 if the MEM was a variable or the result of a * operator in C;
160 1 if it was the result of a . or -> operator (on a struct) in C.
161 1 in a REG if the register is used only in exit code a loop.
f590cca1 162 1 in a SUBREG expression if was generated from a variable with a
07be3989 163 promoted mode.
6f29feb1
JW		 164 1 in a CODE_LABEL if the label is used for nonlocal gotos
165 and must not be deleted even if its count is zero.
166 1 in a LABEL_REF if this is a reference to a label outside the
167 current loop.
168 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
d45cf215 169 together with the preceding insn. Valid only within sched.
6f29feb1
JW		 170 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
171 from the target of a branch. Valid from reorg until end of compilation;
b53978a3
JO		 172 cleared before used.
173 1 in an INSN if this insn is dead code. Valid only during
eebedaa5 174 dead-code elimination phase; cleared before use. */
6f29feb1
JW		 175 unsigned int in_struct : 1;
176 /* 1 if this rtx is used. This is used for copying shared structure.
177 See `unshare_all_rtl'.
f590cca1 178 In a REG, this is not needed for that purpose, and used instead
6f29feb1
JW		 179 in `leaf_renumber_regs_insn'.
180 In a SYMBOL_REF, means that emit_library_call
181 has used it as the function. */
182 unsigned int used : 1;
183 /* Nonzero if this rtx came from procedure integration.
184 In a REG, nonzero means this reg refers to the return value
ff0b6b99
FS		 185 of the current function.
186 1 in a SYMBOL_REF if the symbol is weak. */
6f29feb1 187 unsigned integrated : 1;
b664de3a 188 /* 1 in an INSN or a SET if this rtx is related to the call frame,
c6df88cb 189 either changing how we compute the frame address or saving and
f590cca1 190 restoring registers in the prologue and epilogue.
c6df88cb 191 1 in a MEM if the MEM refers to a scalar, rather than a member of
bd7cf17e 192 an aggregate.
3502dc9c 193 1 in a REG if the register is a pointer.
bd7cf17e
JJ		 194 1 in a SYMBOL_REF if it addresses something in the per-function
195 constant string pool. */
469ac993 196 unsigned frame_related : 1;
0a25f1f5 197
6f29feb1
JW		 198 /* The first element of the operands of this rtx.
199 The number of operands and their types are controlled
200 by the `code' field, according to rtl.def. */
201 rtunion fld[1];
2f78c311 202};
6f29feb1
JW		 203
204#define NULL_RTX (rtx) 0
205
206/* Define macros to access the `code' field of the rtx. */
207
dbbbbf3b
JDA		 208#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
209#define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
6f29feb1 210
dbbbbf3b
JDA		 211#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
212#define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
6f29feb1
JW		 213
214#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
215#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
469ac993 216#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
6f29feb1
JW		 217
218/* RTL vector. These appear inside RTX's when there is a need
219 for a variable number of things. The principle use is inside
220 PARALLEL expressions. */
221
2f78c311 222struct rtvec_def {
e9a25f70 223 int num_elem; /* number of elements */
2f78c311
ZW		 224 rtx elem[1];
225};
6f29feb1
JW		 226
227#define NULL_RTVEC (rtvec) 0
228
229#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
e9a25f70 230#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
6f29feb1 231
b53978a3 232/* Predicate yielding nonzero iff X is an rtl for a register. */
6f29feb1
JW		 233#define REG_P(X) (GET_CODE (X) == REG)
234
b53978a3
JO		 235/* Predicate yielding nonzero iff X is a label insn. */
236#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
237
238/* Predicate yielding nonzero iff X is a jump insn. */
239#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
240
241/* Predicate yielding nonzero iff X is a note insn. */
242#define NOTE_P(X) (GET_CODE (X) == NOTE)
243
244/* Predicate yielding nonzero iff X is a barrier insn. */
245#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
246
247/* Predicate yielding nonzero iff X is a data for a jump table. */
248#define JUMP_TABLE_DATA_P(INSN) \
249 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
250 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
251
6f29feb1
JW		 252/* 1 if X is a constant value that is an integer. */
253
254#define CONSTANT_P(X) \
255 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
256 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
ee5332b8
RH		 257 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
258 || GET_CODE (X) == CONSTANT_P_RTX)
6f29feb1
JW		 259
260/* General accessor macros for accessing the fields of an rtx. */
261
f4524c9e 262#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
ef178af3
ZW		 263/* The bit with a star outside the statement expr and an & inside is
264 so that N can be evaluated only once. */
8784fdcd 265#define RTL_CHECK1(RTX, N, C1) __extension__ \
83ab3839 266(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 267 enum rtx_code _code = GET_CODE (_rtx); \
268 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
f52eda29
GS		 269 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
270 __FUNCTION__); \
ef178af3 271 if (GET_RTX_FORMAT(_code)[_n] != C1) \
f52eda29
GS		 272 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
273 __FUNCTION__); \
ef178af3
ZW		 274 &_rtx->fld[_n]; }))
275
8784fdcd 276#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
83ab3839 277(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 278 enum rtx_code _code = GET_CODE (_rtx); \
279 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
f52eda29
GS		 280 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
281 __FUNCTION__); \
ef178af3
ZW		 282 if (GET_RTX_FORMAT(_code)[_n] != C1 \
283 && GET_RTX_FORMAT(_code)[_n] != C2) \
284 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
fbfc1192 285 __FUNCTION__); \
ef178af3
ZW		 286 &_rtx->fld[_n]; }))
287
8784fdcd 288#define RTL_CHECKC1(RTX, N, C) __extension__ \
83ab3839 289(*({ rtx _rtx = (RTX); int _n = (N); \
f52eda29
GS		 290 if (GET_CODE (_rtx) != (C)) \
291 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
292 __FUNCTION__); \
83ab3839
RH		 293 &_rtx->fld[_n]; }))
294
8784fdcd 295#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
83ab3839
RH		 296(*({ rtx _rtx = (RTX); int _n = (N); \
297 enum rtx_code _code = GET_CODE (_rtx); \
f52eda29
GS		 298 if (_code != (C1) && _code != (C2)) \
299 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
300 __FUNCTION__); \
83ab3839
RH		 301 &_rtx->fld[_n]; }))
302
8784fdcd 303#define RTVEC_ELT(RTVEC, I) __extension__ \
83ab3839 304(*({ rtvec _rtvec = (RTVEC); int _i = (I); \
ef178af3
ZW		 305 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
306 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
fbfc1192 307 __FUNCTION__); \
ef178af3
ZW		 308 &_rtvec->elem[_i]; }))
309
cdadb1dd 310extern void rtl_check_failed_bounds PARAMS ((rtx, int,
ef178af3
ZW		 311 const char *, int, const char *))
312 ATTRIBUTE_NORETURN;
cdadb1dd 313extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
ef178af3
ZW		 314 const char *, int, const char *))
315 ATTRIBUTE_NORETURN;
cdadb1dd 316extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
ef178af3
ZW		 317 const char *, int, const char *))
318 ATTRIBUTE_NORETURN;
cdadb1dd 319extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
83ab3839
RH		 320 const char *, int, const char *))
321 ATTRIBUTE_NORETURN;
cdadb1dd 322extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
83ab3839
RH		 323 const char *, int, const char *))
324 ATTRIBUTE_NORETURN;
cdadb1dd 325extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
ef178af3
ZW		 326 const char *, int, const char *))
327 ATTRIBUTE_NORETURN;
328
f4524c9e 329#else /* not ENABLE_RTL_CHECKING */
ef178af3 330
83ab3839
RH		 331#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
332#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
333#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
818a3b15 334#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
83ab3839 335#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
ef178af3
ZW		 336
337#endif
338
f52eda29
GS		 339#define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
340#define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
341#define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
342#define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
343#define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
344#define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
345#define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
346#define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
347#define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
348#define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
ef178af3
ZW		 349
350#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
351#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
352
353/* These are like XWINT, etc. except that they expect a '0' field instead
354 of the normal type code. */
355
f52eda29
GS		 356#define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
357#define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
358#define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
359#define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
360#define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
361#define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
362#define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
363#define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
364#define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
365#define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
366#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
367#define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
368#define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem)
369
370#define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
371#define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
372#define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
373#define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
374#define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
375#define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
376#define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
377#define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
378#define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
379#define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
380#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
381#define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
83ab3839
RH		 382
383#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
384#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
385
f52eda29 386#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
6f29feb1
JW		 387\f
388/* ACCESS MACROS for particular fields of insns. */
389
4e872036
AS		 390/* Determines whether X is an insn. */
391#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
392
6f29feb1
JW		 393/* Holds a unique number for each insn.
394 These are not necessarily sequentially increasing. */
f52eda29 395#define INSN_UID(INSN) XINT (INSN, 0)
6f29feb1
JW		 396
397/* Chain insns together in sequence. */
f52eda29
GS		 398#define PREV_INSN(INSN) XEXP (INSN, 1)
399#define NEXT_INSN(INSN) XEXP (INSN, 2)
6f29feb1
JW		 400
401/* The body of an insn. */
f52eda29 402#define PATTERN(INSN) XEXP (INSN, 3)
6f29feb1
JW		 403
404/* Code number of instruction, from when it was recognized.
405 -1 means this instruction has not been recognized yet. */
f52eda29 406#define INSN_CODE(INSN) XINT (INSN, 4)
6f29feb1
JW		 407
408/* Set up in flow.c; empty before then.
409 Holds a chain of INSN_LIST rtx's whose first operands point at
410 previous insns with direct data-flow connections to this one.
411 That means that those insns set variables whose next use is in this insn.
412 They are always in the same basic block as this insn. */
8f985ec4 413#define LOG_LINKS(INSN) XEXP(INSN, 5)
6f29feb1
JW		 414
415/* 1 if insn has been deleted. */
416#define INSN_DELETED_P(INSN) ((INSN)->volatil)
417
24a28584
JH		 418/* 1 if insn is a call to a const or pure function. */
419#define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging)
6f29feb1 420
0a1c58a2
JL		 421/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
422#define SIBLING_CALL_P(INSN) ((INSN)->jump)
423
6f29feb1 424/* 1 if insn is a branch that should not unconditionally execute its
eebedaa5 425 delay slots, i.e., it is an annulled branch. */
6f29feb1
JW		 426#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
427
eebedaa5 428/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
b53978a3
JO		 429#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
430
6f29feb1 431/* 1 if insn is in a delay slot and is from the target of the branch. If
6dc42e49 432 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
6f29feb1
JW		 433 executed if the branch is taken. For annulled branches with this bit
434 clear, the insn should be executed only if the branch is not taken. */
435#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
436
f590cca1
RH		 437#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
438
439#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
440
6f29feb1 441/* Holds a list of notes on what this insn does to various REGs.
f590cca1
RH		 442 It is a chain of EXPR_LIST rtx's, where the second operand is the
443 chain pointer and the first operand is the REG being described.
6f29feb1 444 The mode field of the EXPR_LIST contains not a real machine mode
f590cca1 445 but a value from enum reg_note. */
6f29feb1 446
8f985ec4 447#define REG_NOTES(INSN) XEXP(INSN, 6)
6f29feb1
JW		 448
449/* Don't forget to change reg_note_name in rtl.c. */
f590cca1
RH		 450enum reg_note
451{
452 /* The value in REG dies in this insn (i.e., it is not needed past
453 this insn). If REG is set in this insn, the REG_DEAD note may,
454 but need not, be omitted. */
455 REG_DEAD = 1,
456
457 /* The REG is autoincremented or autodecremented. */
458 REG_INC,
459
460 /* Describes the insn as a whole; it says that the insn sets a register
461 to a constant value or to be equivalent to a memory address. If the
462 register is spilled to the stack then the constant value should be
463 substituted for it. The contents of the REG_EQUIV is the constant
464 value or memory address, which may be different from the source of
465 the SET although it has the same value. A REG_EQUIV note may also
466 appear on an insn which copies a register parameter to a pseudo-register,
467 if there is a memory address which could be used to hold that
468 pseudo-register throughout the function. */
be1bb652 469 REG_EQUIV,
f590cca1
RH		 470
471 /* Like REG_EQUIV except that the destination is only momentarily equal
472 to the specified rtx. Therefore, it cannot be used for substitution;
473 but it can be used for cse. */
474 REG_EQUAL,
475
476 /* The register set in this insn held 0 before the insn. The contents of
477 the note is the insn that stored the 0. If that insn is deleted or
478 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
479 is actually an INSN_LIST, not an EXPR_LIST. */
480 REG_WAS_0,
481
482 /* This insn copies the return-value of a library call out of the hard reg
483 for return values. This note is actually an INSN_LIST and it points to
484 the first insn involved in setting up arguments for the call. flow.c
485 uses this to delete the entire library call when its result is dead. */
486 REG_RETVAL,
487
488 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
be1bb652
RH		 489 and points at the one that has the REG_RETVAL. This note is also an
490 INSN_LIST. */
f590cca1
RH		 491 REG_LIBCALL,
492
493 /* The register is always nonnegative during the containing loop. This is
494 used in branches so that decrement and branch instructions terminating
495 on zero can be matched. There must be an insn pattern in the md file
496 named `decrement_and_branch_until_zero' or else this will never be added
497 to any instructions. */
498 REG_NONNEG,
499
500 /* There is no conflict *after this insn* between the register in the note
501 and the destination of this insn. */
502 REG_NO_CONFLICT,
503
504 /* Identifies a register set in this insn and never used. */
505 REG_UNUSED,
506
507 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
508 respectively. Normally, these are required to be consecutive insns, but
509 we permit putting a cc0-setting insn in the delay slot of a branch as
510 long as only one copy of the insn exists. In that case, these notes
511 point from one to the other to allow code generation to determine what
be1bb652
RH		 512 any require information and to properly update CC_STATUS. These notes
513 are INSN_LISTs. */
f590cca1
RH		 514 REG_CC_SETTER, REG_CC_USER,
515
516 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
be1bb652
RH		 517 CODE_LABEL contained in the REG_LABEL note is used by the insn.
518 This note is an INSN_LIST. */
f590cca1
RH		 519 REG_LABEL,
520
521 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
522 write-after-read and write-after-write dependencies respectively.
523 Data dependencies, which are the only type of LOG_LINK created by
524 flow, are represented by a 0 reg note kind. */
525 REG_DEP_ANTI, REG_DEP_OUTPUT,
526
4db384c9
JH		 527 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
528 It has an integer value. For jumps, it is the probability that this is a
529 taken branch. For calls, it is the probability that this call won't
530 return. */
f590cca1
RH		 531 REG_BR_PROB,
532
533 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
534 the first insn after each CALL_INSN. It indicates how many times this
535 block was executed. */
536 REG_EXEC_COUNT,
537
538 /* Attached to a call insn; indicates that the call is malloc-like and
539 that the pointer returned cannot alias anything else. */
540 REG_NOALIAS,
541
542 /* Used to optimize rtl generated by dynamic stack allocations for targets
543 where SETJMP_VIA_SAVE_AREA is true. */
544 REG_SAVE_AREA,
545
4db384c9
JH		 546 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
547 CONCAT of two integer value. First specifies the branch predictor
548 that added the note, second specifies the predicted hitrate of branch
549 in the same format as REG_BR_PROB note uses. */
f590cca1
RH		 550 REG_BR_PRED,
551
552 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
553 for DWARF to interpret what they imply. The attached rtx is used
554 instead of intuition. */
555 REG_FRAME_RELATED_EXPR,
556
557 /* Indicates that REG holds the exception context for the function.
558 This context is shared by inline functions, so the code to acquire
559 the real exception context is delayed until after inlining. */
560 REG_EH_CONTEXT,
561
562 /* Indicates what exception region an INSN belongs in. This is used to
563 indicate what region to which a call may throw. REGION 0 indicates
564 that a call cannot throw at all. REGION -1 indicates that it cannot
565 throw, nor will it execute a non-local goto. */
566 REG_EH_REGION,
567
f590cca1 568 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
8cd8f856
GK		 569 REG_SAVE_NOTE,
570
571 /* Indicates that this insn (which is part of the prologue) computes
572 a value which might not be used later, and if so it's OK to delete
573 the insn. Normally, deleting any insn in the prologue is an error.
574 At present the parameter is unused and set to (const_int 0). */
ca3920ad
JW		 575 REG_MAYBE_DEAD,
576
577 /* Indicates that a call does not return. */
4b01bd16
RH		 578 REG_NORETURN,
579
580 /* Indicates that an indirect jump is a non-local goto instead of a
581 computed goto. */
570a98eb
JH		 582 REG_NON_LOCAL_GOTO,
583
584 /* This kind of note is generated at each to `setjmp',
585 and similar functions that can return twice. */
9d98f8f9
JH		 586 REG_SETJMP,
587
588 /* Indicate calls that always returns. */
4a8d0c9c
RH		 589 REG_ALWAYS_RETURN,
590
591 /* Indicate that the memory load references a vtable. The expression
592 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
593 REG_VTABLE_REF
f590cca1
RH		 594};
595
7ae21caf
DE		 596/* The base value for branch probability notes. */
597#define REG_BR_PROB_BASE 10000
6f29feb1
JW		 598
599/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
600#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
f52eda29
GS		 601#define PUT_REG_NOTE_KIND(LINK, KIND) \
602 PUT_MODE (LINK, (enum machine_mode) (KIND))
6f29feb1
JW		 603
604/* Names for REG_NOTE's in EXPR_LIST insn's. */
605
1f9a015e 606extern const char * const reg_note_name[];
0f41302f 607#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
6f29feb1 608
e51c6661
RK		 609/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
610 USE and CLOBBER expressions.
611 USE expressions list the registers filled with arguments that
612 are passed to the function.
613 CLOBBER expressions document the registers explicitly clobbered
614 by this CALL_INSN.
615 Pseudo registers can not be mentioned in this list. */
8f985ec4 616#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
e51c6661 617
6f29feb1
JW		 618/* The label-number of a code-label. The assembler label
619 is made from `L' and the label-number printed in decimal.
620 Label numbers are unique in a compilation. */
f52eda29 621#define CODE_LABEL_NUMBER(INSN) XINT (INSN, 5)
6f29feb1
JW		 622
623#define LINE_NUMBER NOTE
624
0dfa1860
MM		 625/* In a NOTE that is a line number, this is a string for the file name that the
626 line is in. We use the same field to record block numbers temporarily in
627 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
628 between ints and pointers if we use a different macro for the block number.)
629 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
4fe9b91c 630 information as an rtx in the field. */
6f29feb1 631
f52eda29
GS		 632#define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 3, NOTE)
633#define NOTE_BLOCK(INSN) XCTREE (INSN, 3, NOTE)
634#define NOTE_EH_HANDLER(INSN) XCINT (INSN, 3, NOTE)
635#define NOTE_RANGE_INFO(INSN) XCEXP (INSN, 3, NOTE)
636#define NOTE_LIVE_INFO(INSN) XCEXP (INSN, 3, NOTE)
637#define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 3, NOTE)
638#define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 3, NOTE)
0dfa1860 639
6f29feb1
JW		 640/* In a NOTE that is a line number, this is the line number.
641 Other kinds of NOTEs are identified by negative numbers here. */
f52eda29 642#define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 4, NOTE)
6f29feb1 643
589ca5cb
MM		 644/* Nonzero if INSN is a note marking the beginning of a basic block. */
645#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
646 (GET_CODE (INSN) == NOTE \
647 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
648
6f29feb1 649/* Codes that appear in the NOTE_LINE_NUMBER field
a31efb86 650 for kinds of notes that are not line numbers.
6f29feb1 651
a31efb86
DE		 652 Notice that we do not try to use zero here for any of
653 the special note codes because sometimes the source line
654 actually can be zero! This happens (for example) when we
655 are generating code for the per-translation-unit constructor
656 and destructor routines for some C++ translation unit.
657
658 If you should change any of the following values, or if you
659 should add a new value here, don't forget to change the
660 note_insn_name array in rtl.c. */
6f29feb1 661
d636c18c
RH		 662enum insn_note
663{
664 /* Keep all of these numbers negative. Adjust as needed. */
665 NOTE_INSN_BIAS = -100,
666
667 /* This note is used to get rid of an insn
668 when it isn't safe to patch the insn out of the chain. */
669 NOTE_INSN_DELETED,
670
671 /* These are used to mark the beginning and end of a lexical block.
672 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
673 NOTE_INSN_BLOCK_BEG,
674 NOTE_INSN_BLOCK_END,
675
676 /* These mark the extremes of a loop. */
677 NOTE_INSN_LOOP_BEG,
678 NOTE_INSN_LOOP_END,
679
680 /* Generated at the place in a loop that `continue' jumps to. */
681 NOTE_INSN_LOOP_CONT,
682 /* Generated at the start of a duplicated exit test. */
683 NOTE_INSN_LOOP_VTOP,
684
685 /* This kind of note is generated at the end of the function body,
686 just before the return insn or return label. In an optimizing
687 compilation it is deleted by the first jump optimization, after
688 enabling that optimizer to determine whether control can fall
689 off the end of the function body without a return statement. */
690 NOTE_INSN_FUNCTION_END,
691
d636c18c
RH		 692 /* This marks the point immediately after the last prologue insn. */
693 NOTE_INSN_PROLOGUE_END,
694
695 /* This marks the point immediately prior to the first epilogue insn. */
696 NOTE_INSN_EPILOGUE_BEG,
697
698 /* Generated in place of user-declared labels when they are deleted. */
699 NOTE_INSN_DELETED_LABEL,
700
701 /* This note indicates the start of the real body of the function,
702 i.e. the point just after all of the parms have been moved into
703 their homes, etc. */
704 NOTE_INSN_FUNCTION_BEG,
705
706 /* These note where exception handling regions begin and end.
707 Uses NOTE_EH_HANDLER to identify the region in question. */
708 NOTE_INSN_EH_REGION_BEG,
709 NOTE_INSN_EH_REGION_END,
710
711 /* Generated whenever a duplicate line number note is output. For example,
712 one is output after the end of an inline function, in order to prevent
eebedaa5 713 the line containing the inline call from being counted twice in gcov. */
b3b42a4d 714 NOTE_INSN_REPEATED_LINE_NUMBER,
d636c18c
RH		 715
716 /* Start/end of a live range region, where pseudos allocated on the stack
717 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
b3b42a4d 718 NOTE_INSN_RANGE_BEG,
d636c18c
RH		 719 NOTE_INSN_RANGE_END,
720
721 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
722 NOTE_INSN_LIVE,
723
eebedaa5 724 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
d636c18c
RH		 725 NOTE_INSN_BASIC_BLOCK,
726
994a57cd
RH		 727 /* Record the expected value of a register at a location. Uses
728 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
729 NOTE_INSN_EXPECTED_VALUE,
730
d636c18c
RH		 731 NOTE_INSN_MAX
732};
10f07067 733
6f29feb1
JW		 734/* Names for NOTE insn's other than line numbers. */
735
d636c18c
RH		 736extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
737#define GET_NOTE_INSN_NAME(NOTE_CODE) \
dbbbbf3b 738 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
6f29feb1
JW		 739
740/* The name of a label, in case it corresponds to an explicit label
741 in the input source code. */
f52eda29 742#define LABEL_NAME(RTX) XCSTR (RTX, 6, CODE_LABEL)
6f29feb1
JW		 743
744/* In jump.c, each label contains a count of the number
745 of LABEL_REFs that point at it, so unused labels can be deleted. */
f52eda29 746#define LABEL_NUSES(RTX) XCINT (RTX, 3, CODE_LABEL)
6f29feb1 747
8cd0faaf 748/* Associate a name with a CODE_LABEL. */
f52eda29 749#define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
8cd0faaf 750
e9a25f70 751/* The original regno this ADDRESSOF was built for. */
f52eda29 752#define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
e9a25f70
JL		 753
754/* The variable in the register we took the address of. */
f52eda29 755#define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
e9a25f70 756
6f29feb1
JW		 757/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
758 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
759 be decremented and possibly the label can be deleted. */
f52eda29 760#define JUMP_LABEL(INSN) XCEXP (INSN, 7, JUMP_INSN)
6f29feb1
JW		 761
762/* Once basic blocks are found in flow.c,
763 each CODE_LABEL starts a chain that goes through
764 all the LABEL_REFs that jump to that label.
be1bb652 765 The chain eventually winds up at the CODE_LABEL: it is circular. */
f52eda29 766#define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
6f29feb1
JW		 767\f
768/* This is the field in the LABEL_REF through which the circular chain
769 of references to a particular label is linked.
770 This chain is set up in flow.c. */
771
f52eda29 772#define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
6f29feb1
JW		 773
774/* Once basic blocks are found in flow.c,
775 Each LABEL_REF points to its containing instruction with this field. */
776
f52eda29 777#define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
6f29feb1 778
08394eef
BS		 779/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
780 the number the register originally had; for a pseudo register turned into
781 a hard reg this will hold the old pseudo register number. */
6f29feb1 782
f52eda29
GS		 783#define REGNO(RTX) XCUINT (RTX, 0, REG)
784#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
6f29feb1
JW		 785
786/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
787 is the current function's return value. */
788
789#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
790
791/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
792#define REG_USERVAR_P(RTX) ((RTX)->volatil)
793
3502dc9c
JDA		 794/* 1 in a REG rtx if the register is a pointer. */
795#define REG_POINTER(RTX) ((RTX)->frame_related)
796
cdbca172
JO		 797/* 1 if the given register REG corresponds to a hard register. */
798#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
799
800/* 1 if the given register number REG_NO corresponds to a hard register. */
f52eda29 801#define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
cdbca172 802
6f29feb1
JW		 803/* For a CONST_INT rtx, INTVAL extracts the integer. */
804
83ab3839 805#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
6f29feb1 806
a36556a8
ZW		 807/* For a CONST_DOUBLE:
808 The usual two ints that hold the value.
809 For a DImode, that is all there are;
810 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
811 For a float, the number of ints varies,
812 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
813 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
a79e3a45
RK		 814#define CONST_DOUBLE_LOW(r) XCWINT (r, 1, CONST_DOUBLE)
815#define CONST_DOUBLE_HIGH(r) XCWINT (r, 2, CONST_DOUBLE)
a36556a8
ZW		 816
817/* Link for chain of all CONST_DOUBLEs in use in current function. */
a79e3a45 818#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 0, CONST_DOUBLE)
a36556a8 819
6f29feb1 820/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
ddef6bc7 821 SUBREG_BYTE extracts the byte-number. */
6f29feb1 822
f52eda29
GS		 823#define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
824#define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
ddef6bc7
JJ		 825
826/* in rtlanal.c */
33aceff2 827extern unsigned int subreg_lsb PARAMS ((rtx));
ddef6bc7
JJ		 828extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
829 enum machine_mode,
830 unsigned int,
831 enum machine_mode));
832extern unsigned int subreg_regno PARAMS ((rtx));
6f29feb1 833
07be3989
RK		 834/* 1 if the REG contained in SUBREG_REG is already known to be
835 sign- or zero-extended from the mode of the SUBREG to the mode of
836 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
f590cca1 837 extension.
07be3989
RK		 838
839 When used as a LHS, is means that this extension must be done
840 when assigning to SUBREG_REG. */
841
842#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
843#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
844
6f29feb1
JW		 845/* Access various components of an ASM_OPERANDS rtx. */
846
f52eda29
GS		 847#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
848#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
849#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
850#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
851#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
852#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
853#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
6462bb43 854#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
f52eda29 855 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
3bdf5ad1 856#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
f52eda29 857 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
3bdf5ad1 858#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
f52eda29
GS		 859 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
860#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
861#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
6f29feb1 862
10b76d73
RK		 863/* For a MEM RTX, 1 if we should keep the alias set for this mem
864 unchanged when we access a component. Set to 1, or example, when we
865 are already in a non-addressable component of an aggregate. */
866#define MEM_KEEP_ALIAS_SET_P(RTX) ((RTX)->jump)
867
6f29feb1
JW		 868/* For a MEM rtx, 1 if it's a volatile reference.
869 Also in an ASM_OPERANDS rtx. */
870#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
871
3bdf5ad1
RK		 872/* For a MEM rtx, 1 if it refers to an aggregate, either to the
873 aggregate itself of to a field of the aggregate. If zero, RTX may
4eb00163 874 or may not be such a reference. */
6f29feb1
JW		 875#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
876
c6df88cb 877/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
3ef42a0c 878 not refer to a scalar. */
c6df88cb
MM		 879#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
880
c6df88cb
MM		 881/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
882 RTX. Otherwise, vice versa. Use this macro only when you are
883 *sure* that you know that the MEM is in a structure, or is a
884 scalar. VAL is evaluated only once. */
f52eda29
GS		 885#define MEM_SET_IN_STRUCT_P(RTX, VAL) \
886do { \
f9e158c3
JM		 887 if (VAL) \
888 { \
889 MEM_IN_STRUCT_P (RTX) = 1; \
890 MEM_SCALAR_P (RTX) = 0; \
891 } \
892 else \
893 { \
894 MEM_IN_STRUCT_P (RTX) = 0; \
895 MEM_SCALAR_P (RTX) = 1; \
896 } \
897} while (0)
c6df88cb 898
173b24b9
RK		 899/* The memory attribute block. We provide access macros for each value
900 in the block and provide defaults if none specified. */
901#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
902
41472af8
MM		 903/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
904 set, and may alias anything. Otherwise, the MEM can only alias
905 MEMs in the same alias set. This value is set in a
906 language-dependent manner in the front-end, and should not be
907 altered in the back-end. These set numbers are tested for zero,
908 and compared for equality; they have no other significance. In
909 some front-ends, these numbers may correspond in some way to types,
910 or other language-level entities, but they need not, and the
911 back-end makes no such assumptions. */
173b24b9
RK		 912#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
913
914/* For a MEM rtx, the decl it is known to refer to, if it is known to
998d7deb
RH		 915 refer to part of a DECL. It may also be a COMPONENT_REF. */
916#define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
173b24b9 917
998d7deb 918/* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
173b24b9
RK		 919 RTX that is always a CONST_INT. */
920#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
921
922/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
923 is always a CONST_INT. */
10b76d73
RK		 924#define MEM_SIZE(RTX) \
925(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
926 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
927 : 0)
173b24b9 928
d022d93e 929/* For a MEM rtx, the alignment in bits. */
8ac61af7
RK		 930#define MEM_ALIGN(RTX) \
931(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
932 : GET_MODE (RTX) != BLKmode ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) \
933 : BITS_PER_UNIT)
934
3bdf5ad1
RK		 935
936/* Copy the attributes that apply to memory locations from RHS to LHS. */
10b76d73
RK		 937#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
938 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
939 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
940 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
941 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
942 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
173b24b9 943 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
41472af8 944
6f29feb1
JW		 945/* For a LABEL_REF, 1 means that this reference is to a label outside the
946 loop containing the reference. */
947#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
948
adfaf10a 949/* For a LABEL_REF, 1 means it is for a nonlocal label. */
2a406d2a 950/* Likewise in an EXPR_LIST for a REG_LABEL note. */
adfaf10a
RS		 951#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
952
6f29feb1
JW		 953/* For a CODE_LABEL, 1 means always consider this label to be needed. */
954#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
955
956/* For a REG, 1 means the register is used only in an exit test of a loop. */
957#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
958
959/* During sched, for an insn, 1 means that the insn must be scheduled together
d45cf215 960 with the preceding insn. */
6f29feb1
JW		 961#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
962
b8ec5764
VM		 963/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
964 cost of the dependence link. The cost of executing an instruction
965 may vary based on how the results are used. LINK_COST_ZERO is 1 when
966 the cost through the link varies and is unchanged (i.e., the link has
967 zero additional cost). LINK_COST_FREE is 1 when the cost through the
968 link is zero (i.e., the link makes the cost free). In other cases,
969 the adjustment to the cost is recomputed each time it is needed. */
970#define LINK_COST_ZERO(X) ((X)->jump)
971#define LINK_COST_FREE(X) ((X)->call)
972
6f29feb1
JW		 973/* For a SET rtx, SET_DEST is the place that is set
974 and SET_SRC is the value it is set to. */
83ab3839
RH		 975#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
976#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
3258e996 977#define SET_IS_RETURN_P(RTX) ((RTX)->jump)
6f29feb1
JW		 978
979/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
f52eda29
GS		 980#define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
981#define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
6f29feb1 982
0c99ec5c
RH		 983/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
984 conditionally executing the code on, COND_EXEC_CODE is the code
985 to execute if the condition is true. */
f52eda29
GS		 986#define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
987#define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
0c99ec5c 988
6f29feb1
JW		 989/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
990#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
991
bd7cf17e
JJ		 992/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
993#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
994
6f29feb1
JW		 995/* Flag in a SYMBOL_REF for machine-specific purposes. */
996#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
997
998/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
999#define SYMBOL_REF_USED(RTX) ((RTX)->used)
1000
ff0b6b99
FS		 1001/* 1 means a SYMBOL_REF is weak. */
1002#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
1003
6f29feb1
JW		 1004/* Define a macro to look for REG_INC notes,
1005 but save time on machines where they never exist. */
1006
58e54c44
RS		 1007/* Don't continue this line--convex cc version 4.1 would lose. */
1008#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
f52eda29
GS		 1009#define FIND_REG_INC_NOTE(INSN, REG) \
1010 ((REG) != NULL_RTX && REG_P ((REG)) \
1011 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1012 : find_reg_note ((INSN), REG_INC, (REG)))
6f29feb1 1013#else
f52eda29 1014#define FIND_REG_INC_NOTE(INSN, REG) 0
6f29feb1
JW		 1015#endif
1016
1017/* Indicate whether the machine has any sort of auto increment addressing.
1018 If not, we can avoid checking for REG_INC notes. */
1019
58e54c44
RS		 1020/* Don't continue this line--convex cc version 4.1 would lose. */
1021#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 1022#define AUTO_INC_DEC
1023#endif
0dfa1860 1024
940da324
JL		 1025#ifndef HAVE_PRE_INCREMENT
1026#define HAVE_PRE_INCREMENT 0
1027#endif
1028
1029#ifndef HAVE_PRE_DECREMENT
1030#define HAVE_PRE_DECREMENT 0
1031#endif
1032
1033#ifndef HAVE_POST_INCREMENT
1034#define HAVE_POST_INCREMENT 0
1035#endif
1036
1037#ifndef HAVE_POST_DECREMENT
1038#define HAVE_POST_DECREMENT 0
1039#endif
1040
4b983fdc
RH		 1041#ifndef HAVE_POST_MODIFY_DISP
1042#define HAVE_POST_MODIFY_DISP 0
1043#endif
1044
1045#ifndef HAVE_POST_MODIFY_REG
1046#define HAVE_POST_MODIFY_REG 0
1047#endif
1048
1049#ifndef HAVE_PRE_MODIFY_DISP
1050#define HAVE_PRE_MODIFY_DISP 0
1051#endif
1052
1053#ifndef HAVE_PRE_MODIFY_REG
1054#define HAVE_PRE_MODIFY_REG 0
1055#endif
1056
6e01bd94
MH		 1057
1058/* Some architectures do not have complete pre/post increment/decrement
1059 instruction sets, or only move some modes efficiently. These macros
1060 allow us to tune autoincrement generation. */
1061
1062#ifndef USE_LOAD_POST_INCREMENT
1063#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1064#endif
1065
1066#ifndef USE_LOAD_POST_DECREMENT
1067#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1068#endif
1069
1070#ifndef USE_LOAD_PRE_INCREMENT
1071#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1072#endif
1073
1074#ifndef USE_LOAD_PRE_DECREMENT
1075#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1076#endif
1077
1078#ifndef USE_STORE_POST_INCREMENT
1079#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1080#endif
1081
1082#ifndef USE_STORE_POST_DECREMENT
1083#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1084#endif
1085
1086#ifndef USE_STORE_PRE_INCREMENT
1087#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1088#endif
1089
1090#ifndef USE_STORE_PRE_DECREMENT
1091#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1092#endif
1093
1094
0dfa1860
MM		 1095/* Accessors for RANGE_INFO. */
1096/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1097#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
0dfa1860
MM		 1098
1099/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1100#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
0dfa1860
MM		 1101
1102/* For RANGE_{START,END} notes, return the vector containing the registers used
1103 in the range. */
83ab3839
RH		 1104#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1105#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1106#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
0dfa1860
MM		 1107
1108/* For RANGE_{START,END} notes, the number of calls within the range. */
83ab3839 1109#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
0dfa1860
MM		 1110
1111/* For RANGE_{START,END} notes, the number of insns within the range. */
83ab3839 1112#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
0dfa1860
MM		 1113
1114/* For RANGE_{START,END} notes, a unique # to identify this range. */
83ab3839 1115#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
0dfa1860 1116
eebedaa5 1117/* For RANGE_{START,END} notes, the basic block # the range starts with. */
83ab3839 1118#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
0dfa1860 1119
eebedaa5 1120/* For RANGE_{START,END} notes, the basic block # the range ends with. */
83ab3839 1121#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
0dfa1860
MM		 1122
1123/* For RANGE_{START,END} notes, the loop depth the range is in. */
83ab3839 1124#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
0dfa1860
MM		 1125
1126/* For RANGE_{START,END} notes, the bitmap of live registers at the start
1127 of the range. */
83ab3839 1128#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
0dfa1860
MM		 1129
1130/* For RANGE_{START,END} notes, the bitmap of live registers at the end
1131 of the range. */
83ab3839 1132#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
0dfa1860
MM		 1133
1134/* For RANGE_START notes, the marker # of the start of the range. */
83ab3839 1135#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
0dfa1860
MM		 1136
1137/* For RANGE_START notes, the marker # of the end of the range. */
83ab3839 1138#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
0dfa1860
MM		 1139
1140/* Original pseudo register # for a live range note. */
83ab3839 1141#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
0dfa1860
MM		 1142
1143/* Pseudo register # original register is copied into or -1. */
83ab3839 1144#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
0dfa1860
MM		 1145
1146/* How many times a register in a live range note was referenced. */
83ab3839 1147#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
0dfa1860
MM		 1148
1149/* How many times a register in a live range note was set. */
83ab3839 1150#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
0dfa1860
MM		 1151
1152/* How many times a register in a live range note died. */
83ab3839 1153#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
0dfa1860
MM		 1154
1155/* Whether the original value is needed to be copied into the range register at
eebedaa5 1156 the start of the range. */
83ab3839 1157#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
0dfa1860
MM		 1158
1159/* # of insns the register copy is live over. */
83ab3839 1160#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
0dfa1860
MM		 1161
1162/* # of calls the register copy is live over. */
83ab3839 1163#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
0dfa1860
MM		 1164
1165/* DECL_NODE pointer of the declaration if the register is a user defined
1166 variable. */
83ab3839 1167#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
0dfa1860
MM		 1168
1169/* BLOCK_NODE pointer to the block the variable is declared in if the
1170 register is a user defined variable. */
83ab3839 1171#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
0dfa1860
MM		 1172
1173/* EXPR_LIST of the distinct ranges a variable is in. */
1174#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1175
1176/* Block a variable is declared in. */
1177#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1178
1179/* # of distinct ranges a variable is in. */
1180#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1181
1182/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1183#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1184
1185/* For a NOTE_INSN_LIVE note, the original basic block number. */
1186#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
4e872036
AS		 1187
1188/* Determine if the insn is a PHI node. */
1189#define PHI_NODE_P(X) \
f52eda29 1190 ((X) && GET_CODE (X) == INSN \
4e872036
AS		 1191 && GET_CODE (PATTERN (X)) == SET \
1192 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
6f29feb1 1193\f
bf6bb899
BS		 1194/* Nonzero if we need to distinguish between the return value of this function
1195 and the return value of a function called by this function. This helps
1196 integrate.c.
1197 This is 1 until after the rtl generation pass. */
1198extern int rtx_equal_function_value_matters;
1199
1b3d8f8a
GK		 1200/* Nonzero when we are generating CONCATs. */
1201extern int generating_concat_p;
1202
6f29feb1
JW		 1203/* Generally useful functions. */
1204
ac957f13 1205/* In expmed.c */
cdadb1dd 1206extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
5f4f0e22 1207
f52eda29 1208#define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
5f4f0e22 1209
5f2d6cfa 1210/* In builtins.c */
2f78c311 1211extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
5f2d6cfa 1212
50b2596f 1213/* In explow.c */
c6991660 1214extern void set_stack_check_libfunc PARAMS ((rtx));
cdadb1dd 1215extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
7e4ce834 1216 enum machine_mode));
cdadb1dd
KG		 1217extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1218extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1219extern void optimize_save_area_alloca PARAMS ((rtx));
5f4f0e22 1220
4eb00163 1221/* In emit-rtl.c */
cdadb1dd 1222extern rtx gen_rtx PARAMS ((enum rtx_code,
bdea67fa 1223 enum machine_mode, ...));
cdadb1dd 1224extern rtvec gen_rtvec PARAMS ((int, ...));
cdadb1dd
KG		 1225extern rtx copy_insn_1 PARAMS ((rtx));
1226extern rtx copy_insn PARAMS ((rtx));
4eb00163
JO		 1227
1228/* In rtl.c */
5fe2e41b
GK		 1229extern rtx rtx_alloc PARAMS ((RTX_CODE));
1230extern rtvec rtvec_alloc PARAMS ((int));
cdadb1dd 1231extern rtx copy_rtx PARAMS ((rtx));
4eb00163
JO		 1232
1233/* In emit-rtl.c */
cdadb1dd 1234extern rtx copy_rtx_if_shared PARAMS ((rtx));
4eb00163
JO		 1235
1236/* In rtl.c */
cdadb1dd
KG		 1237extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1238extern rtx shallow_copy_rtx PARAMS ((rtx));
1239extern int rtx_equal_p PARAMS ((rtx, rtx));
4eb00163
JO		 1240
1241/* In emit-rtl.c */
cdadb1dd
KG		 1242extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1243extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1244extern rtx gen_label_rtx PARAMS ((void));
ddef6bc7 1245extern int subreg_hard_regno PARAMS ((rtx, int));
cdadb1dd
KG		 1246extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1247extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1248
1249/* In cse.c */
cdadb1dd 1250extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1251
1252/* In emit-rtl.c */
cdadb1dd 1253extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
5222e470
JH		 1254extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1255 enum machine_mode, rtx));
cdadb1dd
KG		 1256extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1257extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
770ae6cc
RK		 1258extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1259 enum machine_mode));
ddef6bc7
JJ		 1260extern rtx constant_subword PARAMS ((rtx, int,
1261 enum machine_mode));
4eb00163
JO		 1262
1263/* In emit-rtl.c */
770ae6cc
RK		 1264extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1265 enum machine_mode));
cdadb1dd 1266extern int subreg_lowpart_p PARAMS ((rtx));
e0e08ac2
JH		 1267extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1268 enum machine_mode));
1269extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1270 enum machine_mode));
cdadb1dd
KG		 1271extern rtx make_safe_from PARAMS ((rtx, rtx));
1272extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
cdadb1dd
KG		 1273extern rtx get_insns PARAMS ((void));
1274extern const char *get_insn_name PARAMS ((int));
1275extern rtx get_last_insn PARAMS ((void));
1276extern rtx get_last_insn_anywhere PARAMS ((void));
1277extern void start_sequence PARAMS ((void));
1278extern void push_to_sequence PARAMS ((rtx));
1279extern void end_sequence PARAMS ((void));
c14f7160
ML		 1280extern void push_to_full_sequence PARAMS ((rtx, rtx));
1281extern void end_full_sequence PARAMS ((rtx*, rtx*));
cdadb1dd 1282extern rtx gen_sequence PARAMS ((void));
4eb00163
JO		 1283
1284/* In varasm.c */
cdadb1dd 1285extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
03f54026 1286extern rtx mem_for_const_double PARAMS ((rtx));
cdadb1dd 1287extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
4eb00163 1288
4eb00163 1289/* In varasm.c */
cdadb1dd
KG		 1290extern rtx get_pool_constant PARAMS ((rtx));
1291extern enum machine_mode get_pool_mode PARAMS ((rtx));
1292extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1293extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1294extern int get_pool_offset PARAMS ((rtx));
1295extern rtx simplify_subtraction PARAMS ((rtx));
4eb00163
JO		 1296
1297/* In function.c */
cdadb1dd 1298extern rtx assign_stack_local PARAMS ((enum machine_mode,
e5e809f4 1299 HOST_WIDE_INT, int));
cdadb1dd 1300extern rtx assign_stack_temp PARAMS ((enum machine_mode,
e5e809f4 1301 HOST_WIDE_INT, int));
a06ef755
RK		 1302extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode,
1303 HOST_WIDE_INT, int, tree));
2f78c311 1304extern rtx assign_temp PARAMS ((tree, int, int, int));
4eb00163 1305/* In emit-rtl.c */
cdadb1dd
KG		 1306extern rtx emit_insn_before PARAMS ((rtx, rtx));
1307extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1308extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1309extern rtx emit_barrier_before PARAMS ((rtx));
1310extern rtx emit_label_before PARAMS ((rtx, rtx));
1311extern rtx emit_note_before PARAMS ((int, rtx));
1312extern rtx emit_insn_after PARAMS ((rtx, rtx));
1313extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1314extern rtx emit_barrier_after PARAMS ((rtx));
1315extern rtx emit_label_after PARAMS ((rtx, rtx));
1316extern rtx emit_note_after PARAMS ((int, rtx));
3cce094d 1317extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
cdadb1dd
KG		 1318extern rtx emit_insn PARAMS ((rtx));
1319extern rtx emit_insns PARAMS ((rtx));
1320extern rtx emit_insns_before PARAMS ((rtx, rtx));
1321extern rtx emit_insns_after PARAMS ((rtx, rtx));
1322extern rtx emit_jump_insn PARAMS ((rtx));
1323extern rtx emit_call_insn PARAMS ((rtx));
1324extern rtx emit_label PARAMS ((rtx));
1325extern rtx emit_barrier PARAMS ((void));
3cce094d
KG		 1326extern rtx emit_line_note PARAMS ((const char *, int));
1327extern rtx emit_note PARAMS ((const char *, int));
1328extern rtx emit_line_note_force PARAMS ((const char *, int));
cdadb1dd
KG		 1329extern rtx make_insn_raw PARAMS ((rtx));
1330extern rtx previous_insn PARAMS ((rtx));
1331extern rtx next_insn PARAMS ((rtx));
1332extern rtx prev_nonnote_insn PARAMS ((rtx));
1333extern rtx next_nonnote_insn PARAMS ((rtx));
1334extern rtx prev_real_insn PARAMS ((rtx));
1335extern rtx next_real_insn PARAMS ((rtx));
1336extern rtx prev_active_insn PARAMS ((rtx));
1337extern rtx next_active_insn PARAMS ((rtx));
69732dcb 1338extern int active_insn_p PARAMS ((rtx));
cdadb1dd
KG		 1339extern rtx prev_label PARAMS ((rtx));
1340extern rtx next_label PARAMS ((rtx));
1341extern rtx next_cc0_user PARAMS ((rtx));
1342extern rtx prev_cc0_setter PARAMS ((rtx));
4eb00163
JO		 1343
1344/* In jump.c */
cdadb1dd
KG		 1345extern rtx next_nondeleted_insn PARAMS ((rtx));
1346extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
7913f3d0 1347extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
cdadb1dd
KG		 1348extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1349extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1350extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1e5fd094 1351extern void mark_jump_label PARAMS ((rtx, rtx, int));
01f62f01 1352extern void cleanup_barriers PARAMS ((void));
4eb00163 1353
4eb00163 1354/* In jump.c */
2b7d71b2 1355extern bool squeeze_notes PARAMS ((rtx *, rtx *));
53c17031 1356extern rtx delete_related_insns PARAMS ((rtx));
cdadb1dd
KG		 1357extern void delete_jump PARAMS ((rtx));
1358extern void delete_barrier PARAMS ((rtx));
1359extern rtx get_label_before PARAMS ((rtx));
1360extern rtx get_label_after PARAMS ((rtx));
1361extern rtx follow_jumps PARAMS ((rtx));
4eb00163
JO		 1362
1363/* In recog.c */
b72f00af 1364extern rtx *find_constant_term_loc PARAMS ((rtx *));
4eb00163
JO		 1365
1366/* In emit-rtl.c */
cdadb1dd 1367extern rtx try_split PARAMS ((rtx, rtx, int));
6b24c259 1368extern int split_branch_probability;
4eb00163
JO		 1369
1370/* In unknown file */
cdadb1dd 1371extern rtx split_insns PARAMS ((rtx, rtx));
4eb00163
JO		 1372
1373/* In simplify-rtx.c */
d9c695ff
RK		 1374extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1375 enum machine_mode, rtx,
1376 enum machine_mode));
1377extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1378 enum machine_mode, rtx,
1379 rtx));
1380extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1381 enum machine_mode,
1382 enum machine_mode, rtx, rtx,
1383 rtx));
1384extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1385 enum machine_mode, rtx,
1386 rtx));
1387extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1388 enum machine_mode,
1389 rtx, rtx));
1390extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1391 enum machine_mode, rtx,
1392 enum machine_mode));
1393extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1394 enum machine_mode,
1395 enum machine_mode,
1396 rtx, rtx, rtx));
1397extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
141e454b 1398 enum machine_mode,
d9c695ff
RK		 1399 enum machine_mode,
1400 rtx, rtx));
eea50aa0
JH		 1401extern rtx simplify_subreg PARAMS ((enum machine_mode,
1402 rtx,
1403 enum machine_mode,
1404 unsigned int));
949c5d62
JH		 1405extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1406 rtx,
1407 enum machine_mode,
1408 unsigned int));
d9c695ff 1409extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
cdadb1dd 1410extern rtx simplify_rtx PARAMS ((rtx));
732910b9 1411extern rtx avoid_constant_pool_reference PARAMS ((rtx));
4eb00163 1412
4eb00163 1413/* In function.c */
2f78c311 1414extern rtx gen_mem_addressof PARAMS ((rtx, tree));
4eb00163 1415
4eb00163 1416/* In regclass.c */
770ae6cc
RK		 1417extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1418 unsigned int));
4eb00163
JO		 1419
1420/* In emit-rtl.c */
3d238248 1421extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
9ae8ffe7 1422
e9a25f70
JL		 1423/* Functions in rtlanal.c */
1424
b1cdafbb
JH		 1425/* Single set is implemented as macro for performance reasons. */
1426#define single_set(I) (INSN_P (I) \
1427 ? (GET_CODE (PATTERN (I)) == SET \
1428 ? PATTERN (I) : single_set_1 (I)) \
1429 : NULL_RTX)
2130b7fb 1430#define single_set_1(I) single_set_2 (I, PATTERN (I))
b1cdafbb 1431
e38fe8e0 1432extern int rtx_addr_can_trap_p PARAMS ((rtx));
cdadb1dd 1433extern int rtx_unstable_p PARAMS ((rtx));
e38fe8e0
BS		 1434extern int rtx_varies_p PARAMS ((rtx, int));
1435extern int rtx_addr_varies_p PARAMS ((rtx, int));
cdadb1dd
KG		 1436extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1437extern rtx get_related_value PARAMS ((rtx));
d644189f 1438extern rtx get_jump_table_offset PARAMS ((rtx, rtx *));
cdadb1dd 1439extern int reg_mentioned_p PARAMS ((rtx, rtx));
4b983fdc 1440extern int count_occurrences PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1441extern int reg_referenced_p PARAMS ((rtx, rtx));
1442extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1443extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1444extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1445extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
9b3bd424 1446extern int commutative_operand_precedence PARAMS ((rtx));
e5c56fd9 1447extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1448extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1449extern int no_labels_between_p PARAMS ((rtx, rtx));
1450extern int no_jumps_between_p PARAMS ((rtx, rtx));
1451extern int modified_in_p PARAMS ((rtx, rtx));
4eb00163 1452extern int insn_dependent_p PARAMS ((rtx, rtx));
cdadb1dd 1453extern int reg_set_p PARAMS ((rtx, rtx));
2130b7fb 1454extern rtx single_set_2 PARAMS ((rtx, rtx));
cdadb1dd 1455extern int multiple_sets PARAMS ((rtx));
7142e318 1456extern int set_noop_p PARAMS ((rtx));
0005550b 1457extern int noop_move_p PARAMS ((rtx));
cdadb1dd 1458extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
770ae6cc
RK		 1459extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1460 rtx, rtx *));
cdadb1dd 1461extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
91b2d119 1462extern rtx set_of PARAMS ((rtx, rtx));
770ae6cc
RK		 1463extern void note_stores PARAMS ((rtx,
1464 void (*) (rtx, rtx, void *),
1465 void *));
e2373f95
RK		 1466extern void note_uses PARAMS ((rtx *,
1467 void (*) (rtx *, void *),
1468 void *));
cdadb1dd
KG		 1469extern rtx reg_set_last PARAMS ((rtx, rtx));
1470extern int dead_or_set_p PARAMS ((rtx, rtx));
770ae6cc 1471extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
cdadb1dd 1472extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
770ae6cc
RK		 1473extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1474 unsigned int));
d9c695ff 1475extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
cdadb1dd 1476extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
770ae6cc
RK		 1477extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1478 unsigned int));
cdadb1dd
KG		 1479extern void remove_note PARAMS ((rtx, rtx));
1480extern int side_effects_p PARAMS ((rtx));
1481extern int volatile_refs_p PARAMS ((rtx));
1482extern int volatile_insn_p PARAMS ((rtx));
1483extern int may_trap_p PARAMS ((rtx));
1484extern int inequality_comparisons_p PARAMS ((rtx));
1485extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
770ae6cc
RK		 1486extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1487 int));
cdadb1dd
KG		 1488extern int computed_jump_p PARAMS ((rtx));
1489typedef int (*rtx_function) PARAMS ((rtx *, void *));
1490extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
770ae6cc 1491extern rtx regno_use_in PARAMS ((unsigned int, rtx));
cdadb1dd 1492extern int auto_inc_p PARAMS ((rtx));
5f0d2358 1493extern int in_expr_list_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1494extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1495extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
db7ba742 1496extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
833366d6 1497extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
6f29feb1 1498
ae0b51ef
JL		 1499/* flow.c */
1500
cdadb1dd
KG		 1501extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1502void init_EXPR_INSN_LIST_cache PARAMS ((void));
1503void free_EXPR_LIST_list PARAMS ((rtx *));
1504void free_INSN_LIST_list PARAMS ((rtx *));
1505void free_EXPR_LIST_node PARAMS ((rtx));
1506void free_INSN_LIST_node PARAMS ((rtx));
1507rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1508rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
ae0b51ef
JL		 1509
1510/* regclass.c */
1511
6f29feb1
JW		 1512/* Maximum number of parallel sets and clobbers in any insn in this fn.
1513 Always at least 3, since the combiner could put that many togetherm
1514 and we want this to remain correct for all the remaining passes. */
1515
1516extern int max_parallel;
1517
e0c6d139 1518/* Free up register info memory. */
cdadb1dd 1519extern void free_reg_info PARAMS ((void));
e0c6d139 1520
ae0b51ef 1521/* recog.c */
cdadb1dd 1522extern int asm_noperands PARAMS ((rtx));
3cce094d 1523extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
9b3142b3
KG		 1524 const char **,
1525 enum machine_mode *));
6f29feb1 1526
cdadb1dd
KG		 1527extern enum reg_class reg_preferred_class PARAMS ((int));
1528extern enum reg_class reg_alternate_class PARAMS ((int));
6f29feb1 1529
cdadb1dd 1530extern rtx get_first_nonparm_insn PARAMS ((void));
6f29feb1 1531
cdadb1dd 1532extern void split_all_insns PARAMS ((int));
6f862f2f 1533extern void split_all_insns_noflow PARAMS ((void));
6a73406e 1534
68d75312 1535#define MAX_SAVED_CONST_INT 64
5da077de 1536extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
68d75312 1537
5da077de
AS		 1538#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1539#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1540#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1541#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
6f29feb1 1542extern rtx const_true_rtx;
a8efe40d
RK		 1543
1544extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1545
f590cca1 1546/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
a8efe40d
RK		 1547 same as VOIDmode. */
1548
1549#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1550
1551/* Likewise, for the constants 1 and 2. */
1552
1553#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1554#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
6f29feb1 1555
5da077de
AS		 1556/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1557 is used to represent the frame pointer. This is because the
1558 hard frame pointer and the automatic variables are separated by an amount
1559 that cannot be determined until after register allocation. We can assume
1560 that in this case ELIMINABLE_REGS will be defined, one action of which
eebedaa5 1561 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
5da077de
AS		 1562#ifndef HARD_FRAME_POINTER_REGNUM
1563#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1564#endif
1565
1566/* Index labels for global_rtl. */
1567enum global_rtl_index
68d75312 1568{
5da077de
AS		 1569 GR_PC,
1570 GR_CC0,
1571 GR_STACK_POINTER,
1572 GR_FRAME_POINTER,
1573/* For register elimination to work properly these hard_frame_pointer_rtx,
1574 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1575 the same register. */
1576#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1577 GR_ARG_POINTER = GR_FRAME_POINTER,
1578#endif
1579#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1580 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1581#else
1582 GR_HARD_FRAME_POINTER,
1583#endif
1584#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1585#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1586 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1587#else
1588 GR_ARG_POINTER,
1589#endif
1590#endif
1591 GR_VIRTUAL_INCOMING_ARGS,
1592 GR_VIRTUAL_STACK_ARGS,
1593 GR_VIRTUAL_STACK_DYNAMIC,
1594 GR_VIRTUAL_OUTGOING_ARGS,
1595 GR_VIRTUAL_CFA,
1596
1597 GR_MAX
1598};
1599
1600/* Pointers to standard pieces of rtx are stored here. */
1601extern rtx global_rtl[GR_MAX];
1602
1603/* Standard pieces of rtx, to be substituted directly into things. */
1604#define pc_rtx (global_rtl[GR_PC])
1605#define cc0_rtx (global_rtl[GR_CC0])
68d75312 1606
6f29feb1
JW		 1607/* All references to certain hard regs, except those created
1608 by allocating pseudo regs into them (when that's possible),
1609 go through these unique rtx objects. */
5da077de
AS		 1610#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1611#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1612#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1613#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
68d75312 1614
6f29feb1
JW		 1615extern rtx pic_offset_table_rtx;
1616extern rtx struct_value_rtx;
1617extern rtx struct_value_incoming_rtx;
1618extern rtx static_chain_rtx;
1619extern rtx static_chain_incoming_rtx;
07ebc930 1620extern rtx return_address_pointer_rtx;
3b80f6ca
RH		 1621
1622/* Include the RTL generation functions. */
1623
1624#ifndef NO_GENRTL_H
1625#include "genrtl.h"
1626#endif
1627
41472af8
MM		 1628/* There are some RTL codes that require special attention; the
1629 generation functions included above do the raw handling. If you
b4213325
MM		 1630 add to this list, modify special_rtx in gengenrtl.c as well. You
1631 should also modify gen_rtx to use the special function. */
3b80f6ca 1632
a79e3a45 1633extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode,
0133b7d9 1634 HOST_WIDE_INT, HOST_WIDE_INT));
cdadb1dd 1635extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
08394eef 1636extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
cdadb1dd 1637extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
ddef6bc7 1638extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
cdadb1dd 1639extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
3b80f6ca 1640
ddef6bc7
JJ		 1641extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1642
aefdd5ab
JL		 1643/* We need the cast here to ensure that we get the same result both with
1644 and without prototypes. */
1645#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
3b80f6ca 1646
6f29feb1
JW		 1647/* Virtual registers are used during RTL generation to refer to locations into
1648 the stack frame when the actual location isn't known until RTL generation
1649 is complete. The routine instantiate_virtual_regs replaces these with
1650 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1651 a constant. */
1652
1653#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1654
1655/* This points to the first word of the incoming arguments passed on the stack,
1656 either by the caller or by the callee when pretending it was passed by the
1657 caller. */
1658
5da077de 1659#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
6f29feb1
JW		 1660
1661#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1662
60343c3b 1663/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
6f29feb1
JW		 1664 variable on the stack. Otherwise, it points to the first variable on
1665 the stack. */
1666
5da077de 1667#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
6f29feb1
JW		 1668
1669#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1670
1671/* This points to the location of dynamically-allocated memory on the stack
1672 immediately after the stack pointer has been adjusted by the amount
1673 desired. */
1674
5da077de 1675#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
6f29feb1
JW		 1676
1677#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1678
1679/* This points to the location in the stack at which outgoing arguments should
1680 be written when the stack is pre-pushed (arguments pushed using push
1681 insns always use sp). */
1682
5da077de 1683#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
6f29feb1
JW		 1684
1685#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1686
71038426
RH		 1687/* This points to the Canonical Frame Address of the function. This
1688 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1689 but is calculated relative to the arg pointer for simplicity; the
f590cca1 1690 frame pointer nor stack pointer are necessarily fixed relative to
71038426
RH		 1691 the CFA until after reload. */
1692
5da077de 1693#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
71038426
RH		 1694
1695#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1696
1697#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
6f29feb1 1698
a06ef755
RK		 1699/* Nonzero if REGNUM is a pointer into the stack frame. */
1700#define REGNO_PTR_FRAME_P(REGNUM) \
1701 ((REGNUM) == STACK_POINTER_REGNUM \
1702 || (REGNUM) == FRAME_POINTER_REGNUM \
1703 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1704 || (REGNUM) == ARG_POINTER_REGNUM \
1705 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1706 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1707
848e0190 1708/* REGNUM never really appearing in the INSN stream. */
cf403648 1709#define INVALID_REGNUM (~(unsigned int) 0)
848e0190 1710
cdadb1dd 1711extern rtx find_next_ref PARAMS ((rtx, rtx));
f837a861 1712
2f78c311
ZW		 1713extern rtx output_constant_def PARAMS ((tree, int));
1714extern rtx immed_real_const PARAMS ((tree));
6f29feb1
JW		 1715
1716/* Define a default value for STORE_FLAG_VALUE. */
1717
1718#ifndef STORE_FLAG_VALUE
1719#define STORE_FLAG_VALUE 1
1720#endif
1721
0ea0e871
JL		 1722/* Nonzero after the second flow pass has completed.
1723 Set to 1 or 0 by toplev.c */
1724extern int flow2_completed;
1725
6f29feb1 1726/* Nonzero after end of reload pass.
0ea0e871 1727 Set to 1 or 0 by reload1.c. */
6f29feb1
JW		 1728
1729extern int reload_completed;
1730
1731/* Set to 1 while reload_as_needed is operating.
1732 Required by some machines to handle any generated moves differently. */
1733
1734extern int reload_in_progress;
1735
1736/* If this is nonzero, we do not bother generating VOLATILE
1737 around volatile memory references, and we are willing to
1738 output indirect addresses. If cse is to follow, we reject
1739 indirect addresses so a useful potential cse is generated;
1740 if it is used only once, instruction combination will produce
1741 the same indirect address eventually. */
1742extern int cse_not_expected;
1743
f1db3576
JL		 1744/* Set to nonzero before life analysis to indicate that it is unsafe to
1745 generate any new pseudo registers. */
1746extern int no_new_pseudos;
1747
f5118aa5 1748/* Translates rtx code to tree code, for those codes needed by
88efc60a
RK		 1749 REAL_ARITHMETIC. The function returns an int because the caller may not
1750 know what `enum tree_code' means. */
1751
cdadb1dd 1752extern int rtx_to_tree_code PARAMS ((enum rtx_code));
9ae8ffe7 1753
ac957f13 1754/* In tree.c */
ac957f13 1755struct obstack;
cdadb1dd 1756extern void gcc_obstack_init PARAMS ((struct obstack *));
1f8f4a0b 1757
ac957f13
JL		 1758/* In cse.c */
1759struct cse_basic_block_data;
f1c1dfc3
BS		 1760
1761/* Return the right cost to give to an operation
1762 to make the cost of the corresponding register-to-register instruction
1763 N times that of a fast register-to-register instruction. */
1764#define COSTS_N_INSNS(N) ((N) * 4)
1765
1766/* Maximum cost of a rtl expression. This value has the special meaning
1767 not to use an rtx with this cost under any circumstances. */
1768#define MAX_COST INT_MAX
1769
cdadb1dd 1770extern int rtx_cost PARAMS ((rtx, enum rtx_code));
01329426 1771extern int address_cost PARAMS ((rtx, enum machine_mode));
4793dca1 1772extern void delete_trivially_dead_insns PARAMS ((rtx, int, int));
ac957f13 1773#ifdef BUFSIZ
cdadb1dd 1774extern int cse_main PARAMS ((rtx, int, int, FILE *));
ac957f13 1775#endif
cdadb1dd 1776extern void cse_end_of_basic_block PARAMS ((rtx,
ac957f13
JL		 1777 struct cse_basic_block_data *,
1778 int, int, int));
1779
1780/* In jump.c */
cdadb1dd
KG		 1781extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1782extern int condjump_p PARAMS ((rtx));
e4c85816
JH		 1783extern int any_condjump_p PARAMS ((rtx));
1784extern int any_uncondjump_p PARAMS ((rtx));
1785extern int safe_to_remove_jump_p PARAMS ((rtx));
1786extern rtx pc_set PARAMS ((rtx));
cdadb1dd
KG		 1787extern rtx condjump_label PARAMS ((rtx));
1788extern int simplejump_p PARAMS ((rtx));
1789extern int returnjump_p PARAMS ((rtx));
1790extern int onlyjump_p PARAMS ((rtx));
44ce0063 1791extern int only_sets_cc0_p PARAMS ((rtx));
cdadb1dd 1792extern int sets_cc0_p PARAMS ((rtx));
2ea64f10 1793extern int invert_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1794extern int invert_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1795extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1796extern int true_regnum PARAMS ((rtx));
2ea64f10 1797extern int redirect_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1798extern int redirect_jump PARAMS ((rtx, rtx, int));
cdadb1dd 1799extern void rebuild_jump_labels PARAMS ((rtx));
ab94bc48
JH		 1800extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1801extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1802 rtx, rtx, rtx));
cdadb1dd
KG		 1803extern void delete_for_peephole PARAMS ((rtx, rtx));
1804extern int condjump_in_parallel_p PARAMS ((rtx));
1805extern void never_reached_warning PARAMS ((rtx));
0045d504
JH		 1806extern void purge_line_number_notes PARAMS ((rtx));
1807extern void copy_loop_headers PARAMS ((rtx));
14bf4a33 1808
eebedaa5 1809/* In emit-rtl.c. */
cdadb1dd
KG		 1810extern int max_reg_num PARAMS ((void));
1811extern int max_label_num PARAMS ((void));
1812extern int get_first_label_num PARAMS ((void));
1813extern void delete_insns_since PARAMS ((rtx));
1814extern void mark_reg_pointer PARAMS ((rtx, int));
1815extern void mark_user_reg PARAMS ((rtx));
1816extern void reset_used_flags PARAMS ((rtx));
1817extern void reorder_insns PARAMS ((rtx, rtx, rtx));
3c030e88 1818extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
cdadb1dd
KG		 1819extern int get_max_uid PARAMS ((void));
1820extern int in_sequence_p PARAMS ((void));
1821extern void force_next_line_note PARAMS ((void));
1822extern void clear_emit_caches PARAMS ((void));
1823extern void init_emit PARAMS ((void));
1824extern void init_emit_once PARAMS ((int));
1825extern void push_topmost_sequence PARAMS ((void));
1826extern void pop_topmost_sequence PARAMS ((void));
1827extern int subreg_realpart_p PARAMS ((rtx));
1828extern void reverse_comparison PARAMS ((rtx));
1829extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1830extern void set_new_first_and_last_label_num PARAMS ((int, int));
1831extern void set_new_last_label_num PARAMS ((int));
d1b81779 1832extern void unshare_all_rtl_again PARAMS ((rtx));
cdadb1dd
KG		 1833extern void set_last_insn PARAMS ((rtx));
1834extern void link_cc0_insns PARAMS ((rtx));
1835extern void add_insn PARAMS ((rtx));
1836extern void add_insn_before PARAMS ((rtx, rtx));
1837extern void add_insn_after PARAMS ((rtx, rtx));
1838extern void remove_insn PARAMS ((rtx));
1839extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1840extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1841extern enum rtx_code classify_insn PARAMS ((rtx));
1842extern rtx emit PARAMS ((rtx));
a11759a3
JR		 1843/* Query and clear/ restore no_line_numbers. This is used by the
1844 switch / case handling in stmt.c to give proper line numbers in
1845 warnings about unreachable code. */
cdadb1dd
KG		 1846int force_line_numbers PARAMS ((void));
1847void restore_line_number_status PARAMS ((int old_value));
1848extern void renumber_insns PARAMS ((FILE *));
f8855270 1849extern void remove_unnecessary_notes PARAMS ((void));
53c17031
JH		 1850extern rtx delete_insn PARAMS ((rtx));
1851extern void delete_insn_chain PARAMS ((rtx, rtx));
ac957f13 1852
ac957f13 1853/* In combine.c */
770ae6cc
RK		 1854extern int combine_instructions PARAMS ((rtx, unsigned int));
1855extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1856extern rtx remove_death PARAMS ((unsigned int, rtx));
ac957f13 1857#ifdef BUFSIZ
cdadb1dd
KG		 1858extern void dump_combine_stats PARAMS ((FILE *));
1859extern void dump_combine_total_stats PARAMS ((FILE *));
ac957f13
JL		 1860#endif
1861
eebedaa5 1862/* In sched.c. */
ac957f13 1863#ifdef BUFSIZ
cdadb1dd 1864extern void schedule_insns PARAMS ((FILE *));
18e720b3 1865extern void schedule_ebbs PARAMS ((FILE *));
ac957f13 1866#endif
cdadb1dd 1867extern void fix_sched_param PARAMS ((const char *, const char *));
ac957f13
JL		 1868
1869/* In print-rtl.c */
47c10e9b 1870extern const char *print_rtx_head;
cdadb1dd
KG		 1871extern void debug_rtx PARAMS ((rtx));
1872extern void debug_rtx_list PARAMS ((rtx, int));
4c85a96d 1873extern void debug_rtx_range PARAMS ((rtx, rtx));
cdadb1dd 1874extern rtx debug_rtx_find PARAMS ((rtx, int));
ac957f13 1875#ifdef BUFSIZ
998d7deb 1876extern void print_mem_expr PARAMS ((FILE *, tree));
cdadb1dd 1877extern void print_rtl PARAMS ((FILE *, rtx));
75b7557d 1878extern void print_simple_rtl PARAMS ((FILE *, rtx));
cdadb1dd
KG		 1879extern int print_rtl_single PARAMS ((FILE *, rtx));
1880extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
ac957f13
JL		 1881#endif
1882
1883/* In loop.c */
cdadb1dd
KG		 1884extern void init_loop PARAMS ((void));
1885extern rtx libcall_other_reg PARAMS ((rtx, rtx));
ac957f13 1886#ifdef BUFSIZ
1bf14ad7 1887extern void loop_optimize PARAMS ((rtx, FILE *, int));
ac957f13 1888#endif
cdadb1dd 1889extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
ac957f13
JL		 1890
1891/* In function.c */
cdadb1dd
KG		 1892extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1893extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1894extern int prologue_epilogue_contains PARAMS ((rtx));
0a1c58a2 1895extern int sibcall_epilogue_contains PARAMS ((rtx));
591ccf92 1896extern void preserve_rtl_expr_result PARAMS ((rtx));
cdadb1dd
KG		 1897extern void mark_temp_addr_taken PARAMS ((rtx));
1898extern void update_temp_slot_address PARAMS ((rtx, rtx));
cdadb1dd 1899extern void purge_addressof PARAMS ((rtx));
659e47fb 1900extern void purge_hard_subreg_sets PARAMS ((rtx));
ac957f13 1901
ac957f13 1902/* In stmt.c */
47ee9bcb 1903extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
cdadb1dd
KG		 1904extern void expand_null_return PARAMS ((void));
1905extern void emit_jump PARAMS ((rtx));
1906extern int preserve_subexpressions_p PARAMS ((void));
ac957f13
JL		 1907
1908/* In expr.c */
3bdf5ad1
RK		 1909extern void move_by_pieces PARAMS ((rtx, rtx,
1910 unsigned HOST_WIDE_INT,
1911 unsigned int));
2e245dac 1912
ac957f13 1913/* In flow.c */
0626ef8a
AM		 1914extern void recompute_reg_usage PARAMS ((rtx, int));
1915extern int initialize_uninitialized_subregs PARAMS ((void));
ac957f13 1916#ifdef BUFSIZ
0626ef8a
AM		 1917extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1918extern void dump_flow_info PARAMS ((FILE *));
ac957f13
JL		 1919#endif
1920
1921/* In expmed.c */
cdadb1dd
KG		 1922extern void init_expmed PARAMS ((void));
1923extern void expand_inc PARAMS ((rtx, rtx));
1924extern void expand_dec PARAMS ((rtx, rtx));
1925extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
ac957f13
JL		 1926 unsigned HOST_WIDE_INT, rtx,
1927 int, int));
1928
50b2596f
KG		 1929/* In gcse.c */
1930#ifdef BUFSIZ
cdadb1dd 1931extern int gcse_main PARAMS ((rtx, FILE *));
50b2596f
KG		 1932#endif
1933
ac957f13 1934/* In global.c */
cdadb1dd 1935extern void mark_elimination PARAMS ((int, int));
ac957f13 1936#ifdef BUFSIZ
cdadb1dd
KG		 1937extern int global_alloc PARAMS ((FILE *));
1938extern void dump_global_regs PARAMS ((FILE *));
ac957f13 1939#endif
cab634f2 1940#ifdef HARD_CONST
cdadb1dd 1941extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
cab634f2 1942#endif
d29c259b 1943extern void build_insn_chain PARAMS ((rtx));
ac957f13
JL		 1944
1945/* In regclass.c */
cdadb1dd
KG		 1946extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1947extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1948extern void globalize_reg PARAMS ((int));
1949extern void init_regs PARAMS ((void));
1950extern void init_reg_sets PARAMS ((void));
1951extern void regset_release_memory PARAMS ((void));
1952extern void regclass_init PARAMS ((void));
1953extern void regclass PARAMS ((rtx, int, FILE *));
770ae6cc
RK		 1954extern void reg_scan PARAMS ((rtx, unsigned int, int));
1955extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
cdadb1dd
KG		 1956extern void fix_register PARAMS ((const char *, int, int));
1957
1958extern void delete_null_pointer_checks PARAMS ((rtx));
a157febd 1959
50b2596f
KG		 1960/* In regmove.c */
1961#ifdef BUFSIZ
cdadb1dd 1962extern void regmove_optimize PARAMS ((rtx, int, FILE *));
50b2596f 1963#endif
1e7f0a48 1964extern void combine_stack_adjustments PARAMS ((void));
50b2596f
KG		 1965
1966/* In reorg.c */
1967#ifdef BUFSIZ
cdadb1dd 1968extern void dbr_schedule PARAMS ((rtx, FILE *));
50b2596f
KG		 1969#endif
1970
ac957f13
JL		 1971/* In local-alloc.c */
1972#ifdef BUFSIZ
cdadb1dd 1973extern void dump_local_alloc PARAMS ((FILE *));
ac957f13 1974#endif
cdadb1dd
KG		 1975extern int local_alloc PARAMS ((void));
1976extern int function_invariant_p PARAMS ((rtx));
ac957f13 1977
ac957f13 1978/* In profile.c */
cdadb1dd 1979extern void init_branch_prob PARAMS ((const char *));
51891abe
JH		 1980extern void branch_prob PARAMS ((void));
1981extern void end_branch_prob PARAMS ((void));
cdadb1dd 1982extern void output_func_start_profiler PARAMS ((void));
ac957f13
JL		 1983
1984/* In reg-stack.c */
1985#ifdef BUFSIZ
cdadb1dd 1986extern void reg_to_stack PARAMS ((rtx, FILE *));
ac957f13 1987#endif
ac957f13
JL		 1988
1989/* In fold-const.c */
05bccae2
RK		 1990extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1991 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1992 unsigned HOST_WIDE_INT *,
1993 HOST_WIDE_INT *));
1994extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1995 unsigned HOST_WIDE_INT *,
1996 HOST_WIDE_INT *));
1997extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1998 HOST_WIDE_INT,
1999 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2000 unsigned HOST_WIDE_INT *,
2001 HOST_WIDE_INT *));
2002extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2003 HOST_WIDE_INT, unsigned int,
2004 unsigned HOST_WIDE_INT *,
2005 HOST_WIDE_INT *, int));
2006extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2007 HOST_WIDE_INT, unsigned int,
2008 unsigned HOST_WIDE_INT *,
2009 HOST_WIDE_INT *, int));
2010extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2011 HOST_WIDE_INT, unsigned int,
2012 unsigned HOST_WIDE_INT *,
2013 HOST_WIDE_INT *));
2014extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2015 HOST_WIDE_INT, unsigned int,
2016 unsigned HOST_WIDE_INT *,
2017 HOST_WIDE_INT *));
ac957f13
JL		 2018
2019/* In calls.c */
ebb1b59a
BS		 2020enum libcall_type
2021{
2022 LCT_NORMAL = 0,
2023 LCT_CONST = 1,
2024 LCT_PURE = 2,
2025 LCT_CONST_MAKE_BLOCK = 3,
695ee791 2026 LCT_PURE_MAKE_BLOCK = 4,
9555a122 2027 LCT_NORETURN = 5,
9d98f8f9 2028 LCT_THROW = 6,
9defc9b7
RH		 2029 LCT_ALWAYS_RETURN = 7,
2030 LCT_RETURNS_TWICE = 8
ebb1b59a
BS		 2031};
2032
2033extern void emit_library_call PARAMS ((rtx, enum libcall_type,
2034 enum machine_mode, int,
2035 ...));
2036extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
2037 enum machine_mode, int,
2038 ...));
ac957f13
JL		 2039
2040/* In unroll.c */
cdadb1dd 2041extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
ac957f13
JL		 2042
2043/* In varasm.c */
cdadb1dd 2044extern int in_data_section PARAMS ((void));
cdadb1dd 2045extern void init_varasm_once PARAMS ((void));
ac957f13
JL		 2046
2047/* In rtl.c */
cdadb1dd 2048extern void init_rtl PARAMS ((void));
c25c12b8
R		 2049extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
2050 void *));
2051struct md_constant { char *name, *value; };
ac957f13 2052
bcdaba58 2053#ifdef BUFSIZ
cdadb1dd
KG		 2054extern int read_skip_spaces PARAMS ((FILE *));
2055extern rtx read_rtx PARAMS ((FILE *));
bcdaba58
RH		 2056#endif
2057
2058extern const char *read_rtx_filename;
2059extern int read_rtx_lineno;
2060
987009bf
ZW		 2061/* Redefine abort to report an internal error w/o coredump, and
2062 reporting the location of the error in the source file. This logic
2063 is duplicated in rtl.h and tree.h because every file that needs the
2064 special abort includes one or both. toplev.h gets too few files,
2065 system.h gets too many. */
2066
cdadb1dd 2067extern void fancy_abort PARAMS ((const char *, int, const char *))
987009bf 2068 ATTRIBUTE_NORETURN;
fbfc1192 2069#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
987009bf 2070
ac957f13 2071/* In alias.c */
43fe47ca 2072extern void clear_reg_alias_info PARAMS ((rtx));
db048faf 2073extern rtx canon_rtx PARAMS ((rtx));
cdadb1dd 2074extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
e38fe8e0 2075 int (*)(rtx, int)));
a13d4ebf
AM		 2076extern rtx get_addr PARAMS ((rtx));
2077extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2078 rtx, int (*)(rtx, int)));
cdadb1dd
KG		 2079extern int read_dependence PARAMS ((rtx, rtx));
2080extern int anti_dependence PARAMS ((rtx, rtx));
2081extern int output_dependence PARAMS ((rtx, rtx));
2082extern void mark_constant_function PARAMS ((void));
2083extern void init_alias_once PARAMS ((void));
2084extern void init_alias_analysis PARAMS ((void));
2085extern void end_alias_analysis PARAMS ((void));
cdadb1dd 2086extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
4c649323 2087
0a1c58a2
JL		 2088/* In sibcall.c */
2089typedef enum {
2090 sibcall_use_normal = 1,
2091 sibcall_use_tail_recursion,
2092 sibcall_use_sibcall
2093} sibcall_use_t;
2094
2095extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2096extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2097
21b2cd73 2098#ifdef STACK_REGS
cdadb1dd 2099extern int stack_regs_mentioned PARAMS ((rtx insn));
21b2cd73
JH		 2100#endif
2101
a157febd 2102/* In toplev.c */
a157febd 2103extern rtx stack_limit_rtx;
dfdb644f 2104
7b82b5da 2105/* In regrename.c */
7b82b5da 2106extern void regrename_optimize PARAMS ((void));
8582c27b 2107extern void copyprop_hardreg_forward PARAMS ((void));
7b82b5da 2108
4db384c9 2109/* In ifcvt.c */
2ea64f10
RH		 2110extern void if_convert PARAMS ((int));
2111
4db384c9
JH		 2112/* In predict.c */
2113extern void invert_br_probabilities PARAMS ((rtx));
6ab16dd9 2114extern bool expensive_function_p PARAMS ((int));
88657302 2115#endif /* ! GCC_RTL_H */
Mirror of https://gcc.gnu.org/git/gcc.git