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re PR debug/4461 (Invalid dawrf2 debug code)
[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 257 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
69ef87e2 258 || GET_CODE (X) == CONST_VECTOR \
ee5332b8 259 || GET_CODE (X) == CONSTANT_P_RTX)
6f29feb1
JW		 260
261/* General accessor macros for accessing the fields of an rtx. */
262
f4524c9e 263#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
ef178af3
ZW		 264/* The bit with a star outside the statement expr and an & inside is
265 so that N can be evaluated only once. */
8784fdcd 266#define RTL_CHECK1(RTX, N, C1) __extension__ \
83ab3839 267(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 268 enum rtx_code _code = GET_CODE (_rtx); \
269 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
f52eda29
GS		 270 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
271 __FUNCTION__); \
ef178af3 272 if (GET_RTX_FORMAT(_code)[_n] != C1) \
f52eda29
GS		 273 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
274 __FUNCTION__); \
ef178af3
ZW		 275 &_rtx->fld[_n]; }))
276
8784fdcd 277#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
83ab3839 278(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 279 enum rtx_code _code = GET_CODE (_rtx); \
280 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
f52eda29
GS		 281 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
282 __FUNCTION__); \
ef178af3
ZW		 283 if (GET_RTX_FORMAT(_code)[_n] != C1 \
284 && GET_RTX_FORMAT(_code)[_n] != C2) \
285 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
fbfc1192 286 __FUNCTION__); \
ef178af3
ZW		 287 &_rtx->fld[_n]; }))
288
8784fdcd 289#define RTL_CHECKC1(RTX, N, C) __extension__ \
83ab3839 290(*({ rtx _rtx = (RTX); int _n = (N); \
f52eda29
GS		 291 if (GET_CODE (_rtx) != (C)) \
292 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
293 __FUNCTION__); \
83ab3839
RH		 294 &_rtx->fld[_n]; }))
295
8784fdcd 296#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
83ab3839
RH		 297(*({ rtx _rtx = (RTX); int _n = (N); \
298 enum rtx_code _code = GET_CODE (_rtx); \
f52eda29
GS		 299 if (_code != (C1) && _code != (C2)) \
300 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
301 __FUNCTION__); \
83ab3839
RH		 302 &_rtx->fld[_n]; }))
303
8784fdcd 304#define RTVEC_ELT(RTVEC, I) __extension__ \
83ab3839 305(*({ rtvec _rtvec = (RTVEC); int _i = (I); \
ef178af3
ZW		 306 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
307 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
fbfc1192 308 __FUNCTION__); \
ef178af3
ZW		 309 &_rtvec->elem[_i]; }))
310
cdadb1dd 311extern void rtl_check_failed_bounds PARAMS ((rtx, int,
ef178af3
ZW		 312 const char *, int, const char *))
313 ATTRIBUTE_NORETURN;
cdadb1dd 314extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
ef178af3
ZW		 315 const char *, int, const char *))
316 ATTRIBUTE_NORETURN;
cdadb1dd 317extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
ef178af3
ZW		 318 const char *, int, const char *))
319 ATTRIBUTE_NORETURN;
cdadb1dd 320extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
83ab3839
RH		 321 const char *, int, const char *))
322 ATTRIBUTE_NORETURN;
cdadb1dd 323extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
83ab3839
RH		 324 const char *, int, const char *))
325 ATTRIBUTE_NORETURN;
cdadb1dd 326extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
ef178af3
ZW		 327 const char *, int, const char *))
328 ATTRIBUTE_NORETURN;
329
f4524c9e 330#else /* not ENABLE_RTL_CHECKING */
ef178af3 331
83ab3839
RH		 332#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
333#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
334#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
818a3b15 335#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
83ab3839 336#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
ef178af3
ZW		 337
338#endif
339
f52eda29
GS		 340#define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
341#define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
342#define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
343#define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
344#define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
345#define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
346#define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
347#define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
348#define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
349#define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
ef178af3
ZW		 350
351#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
352#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
353
354/* These are like XWINT, etc. except that they expect a '0' field instead
355 of the normal type code. */
356
f52eda29
GS		 357#define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
358#define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
359#define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
360#define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
361#define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
362#define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
363#define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
364#define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
365#define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
366#define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
367#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
368#define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
369#define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem)
370
371#define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
372#define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
373#define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
374#define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
375#define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
376#define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
377#define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
378#define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
379#define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
380#define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
381#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
382#define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
83ab3839
RH		 383
384#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
385#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
386
f52eda29 387#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
6f29feb1
JW		 388\f
389/* ACCESS MACROS for particular fields of insns. */
390
4e872036
AS		 391/* Determines whether X is an insn. */
392#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
393
6f29feb1
JW		 394/* Holds a unique number for each insn.
395 These are not necessarily sequentially increasing. */
f52eda29 396#define INSN_UID(INSN) XINT (INSN, 0)
6f29feb1
JW		 397
398/* Chain insns together in sequence. */
f52eda29
GS		 399#define PREV_INSN(INSN) XEXP (INSN, 1)
400#define NEXT_INSN(INSN) XEXP (INSN, 2)
6f29feb1
JW		 401
402/* The body of an insn. */
f52eda29 403#define PATTERN(INSN) XEXP (INSN, 3)
6f29feb1
JW		 404
405/* Code number of instruction, from when it was recognized.
406 -1 means this instruction has not been recognized yet. */
f52eda29 407#define INSN_CODE(INSN) XINT (INSN, 4)
6f29feb1
JW		 408
409/* Set up in flow.c; empty before then.
410 Holds a chain of INSN_LIST rtx's whose first operands point at
411 previous insns with direct data-flow connections to this one.
412 That means that those insns set variables whose next use is in this insn.
413 They are always in the same basic block as this insn. */
8f985ec4 414#define LOG_LINKS(INSN) XEXP(INSN, 5)
6f29feb1
JW		 415
416/* 1 if insn has been deleted. */
417#define INSN_DELETED_P(INSN) ((INSN)->volatil)
418
24a28584
JH		 419/* 1 if insn is a call to a const or pure function. */
420#define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging)
6f29feb1 421
0a1c58a2
JL		 422/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
423#define SIBLING_CALL_P(INSN) ((INSN)->jump)
424
6f29feb1 425/* 1 if insn is a branch that should not unconditionally execute its
eebedaa5 426 delay slots, i.e., it is an annulled branch. */
6f29feb1
JW		 427#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
428
eebedaa5 429/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
b53978a3
JO		 430#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
431
6f29feb1 432/* 1 if insn is in a delay slot and is from the target of the branch. If
6dc42e49 433 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
6f29feb1
JW		 434 executed if the branch is taken. For annulled branches with this bit
435 clear, the insn should be executed only if the branch is not taken. */
436#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
437
f590cca1
RH		 438#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
439
440#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
441
6f29feb1 442/* Holds a list of notes on what this insn does to various REGs.
f590cca1
RH		 443 It is a chain of EXPR_LIST rtx's, where the second operand is the
444 chain pointer and the first operand is the REG being described.
6f29feb1 445 The mode field of the EXPR_LIST contains not a real machine mode
f590cca1 446 but a value from enum reg_note. */
6f29feb1 447
8f985ec4 448#define REG_NOTES(INSN) XEXP(INSN, 6)
6f29feb1
JW		 449
450/* Don't forget to change reg_note_name in rtl.c. */
f590cca1
RH		 451enum reg_note
452{
453 /* The value in REG dies in this insn (i.e., it is not needed past
454 this insn). If REG is set in this insn, the REG_DEAD note may,
455 but need not, be omitted. */
456 REG_DEAD = 1,
457
458 /* The REG is autoincremented or autodecremented. */
459 REG_INC,
460
461 /* Describes the insn as a whole; it says that the insn sets a register
462 to a constant value or to be equivalent to a memory address. If the
463 register is spilled to the stack then the constant value should be
464 substituted for it. The contents of the REG_EQUIV is the constant
465 value or memory address, which may be different from the source of
466 the SET although it has the same value. A REG_EQUIV note may also
467 appear on an insn which copies a register parameter to a pseudo-register,
468 if there is a memory address which could be used to hold that
469 pseudo-register throughout the function. */
be1bb652 470 REG_EQUIV,
f590cca1
RH		 471
472 /* Like REG_EQUIV except that the destination is only momentarily equal
473 to the specified rtx. Therefore, it cannot be used for substitution;
474 but it can be used for cse. */
475 REG_EQUAL,
476
477 /* The register set in this insn held 0 before the insn. The contents of
478 the note is the insn that stored the 0. If that insn is deleted or
479 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
480 is actually an INSN_LIST, not an EXPR_LIST. */
481 REG_WAS_0,
482
483 /* This insn copies the return-value of a library call out of the hard reg
484 for return values. This note is actually an INSN_LIST and it points to
485 the first insn involved in setting up arguments for the call. flow.c
486 uses this to delete the entire library call when its result is dead. */
487 REG_RETVAL,
488
489 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
be1bb652
RH		 490 and points at the one that has the REG_RETVAL. This note is also an
491 INSN_LIST. */
f590cca1
RH		 492 REG_LIBCALL,
493
494 /* The register is always nonnegative during the containing loop. This is
495 used in branches so that decrement and branch instructions terminating
496 on zero can be matched. There must be an insn pattern in the md file
497 named `decrement_and_branch_until_zero' or else this will never be added
498 to any instructions. */
499 REG_NONNEG,
500
501 /* There is no conflict *after this insn* between the register in the note
502 and the destination of this insn. */
503 REG_NO_CONFLICT,
504
505 /* Identifies a register set in this insn and never used. */
506 REG_UNUSED,
507
508 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
509 respectively. Normally, these are required to be consecutive insns, but
510 we permit putting a cc0-setting insn in the delay slot of a branch as
511 long as only one copy of the insn exists. In that case, these notes
512 point from one to the other to allow code generation to determine what
be1bb652
RH		 513 any require information and to properly update CC_STATUS. These notes
514 are INSN_LISTs. */
f590cca1
RH		 515 REG_CC_SETTER, REG_CC_USER,
516
517 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
be1bb652
RH		 518 CODE_LABEL contained in the REG_LABEL note is used by the insn.
519 This note is an INSN_LIST. */
f590cca1
RH		 520 REG_LABEL,
521
522 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
523 write-after-read and write-after-write dependencies respectively.
524 Data dependencies, which are the only type of LOG_LINK created by
525 flow, are represented by a 0 reg note kind. */
526 REG_DEP_ANTI, REG_DEP_OUTPUT,
527
4db384c9
JH		 528 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
529 It has an integer value. For jumps, it is the probability that this is a
530 taken branch. For calls, it is the probability that this call won't
531 return. */
f590cca1
RH		 532 REG_BR_PROB,
533
534 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
535 the first insn after each CALL_INSN. It indicates how many times this
536 block was executed. */
537 REG_EXEC_COUNT,
538
539 /* Attached to a call insn; indicates that the call is malloc-like and
540 that the pointer returned cannot alias anything else. */
541 REG_NOALIAS,
542
543 /* Used to optimize rtl generated by dynamic stack allocations for targets
544 where SETJMP_VIA_SAVE_AREA is true. */
545 REG_SAVE_AREA,
546
4db384c9
JH		 547 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
548 CONCAT of two integer value. First specifies the branch predictor
549 that added the note, second specifies the predicted hitrate of branch
550 in the same format as REG_BR_PROB note uses. */
f590cca1
RH		 551 REG_BR_PRED,
552
553 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
554 for DWARF to interpret what they imply. The attached rtx is used
555 instead of intuition. */
556 REG_FRAME_RELATED_EXPR,
557
558 /* Indicates that REG holds the exception context for the function.
559 This context is shared by inline functions, so the code to acquire
560 the real exception context is delayed until after inlining. */
561 REG_EH_CONTEXT,
562
563 /* Indicates what exception region an INSN belongs in. This is used to
564 indicate what region to which a call may throw. REGION 0 indicates
565 that a call cannot throw at all. REGION -1 indicates that it cannot
566 throw, nor will it execute a non-local goto. */
567 REG_EH_REGION,
568
f590cca1 569 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
8cd8f856
GK		 570 REG_SAVE_NOTE,
571
572 /* Indicates that this insn (which is part of the prologue) computes
573 a value which might not be used later, and if so it's OK to delete
574 the insn. Normally, deleting any insn in the prologue is an error.
575 At present the parameter is unused and set to (const_int 0). */
ca3920ad
JW		 576 REG_MAYBE_DEAD,
577
578 /* Indicates that a call does not return. */
4b01bd16
RH		 579 REG_NORETURN,
580
581 /* Indicates that an indirect jump is a non-local goto instead of a
582 computed goto. */
570a98eb
JH		 583 REG_NON_LOCAL_GOTO,
584
585 /* This kind of note is generated at each to `setjmp',
586 and similar functions that can return twice. */
9d98f8f9
JH		 587 REG_SETJMP,
588
589 /* Indicate calls that always returns. */
4a8d0c9c
RH		 590 REG_ALWAYS_RETURN,
591
592 /* Indicate that the memory load references a vtable. The expression
593 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
594 REG_VTABLE_REF
f590cca1
RH		 595};
596
7ae21caf
DE		 597/* The base value for branch probability notes. */
598#define REG_BR_PROB_BASE 10000
6f29feb1
JW		 599
600/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
601#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
f52eda29
GS		 602#define PUT_REG_NOTE_KIND(LINK, KIND) \
603 PUT_MODE (LINK, (enum machine_mode) (KIND))
6f29feb1
JW		 604
605/* Names for REG_NOTE's in EXPR_LIST insn's. */
606
1f9a015e 607extern const char * const reg_note_name[];
0f41302f 608#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
6f29feb1 609
e51c6661
RK		 610/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
611 USE and CLOBBER expressions.
612 USE expressions list the registers filled with arguments that
613 are passed to the function.
614 CLOBBER expressions document the registers explicitly clobbered
615 by this CALL_INSN.
616 Pseudo registers can not be mentioned in this list. */
8f985ec4 617#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
e51c6661 618
6f29feb1
JW		 619/* The label-number of a code-label. The assembler label
620 is made from `L' and the label-number printed in decimal.
621 Label numbers are unique in a compilation. */
f52eda29 622#define CODE_LABEL_NUMBER(INSN) XINT (INSN, 5)
6f29feb1
JW		 623
624#define LINE_NUMBER NOTE
625
0dfa1860
MM		 626/* In a NOTE that is a line number, this is a string for the file name that the
627 line is in. We use the same field to record block numbers temporarily in
628 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
629 between ints and pointers if we use a different macro for the block number.)
630 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
4fe9b91c 631 information as an rtx in the field. */
6f29feb1 632
f52eda29
GS		 633#define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 3, NOTE)
634#define NOTE_BLOCK(INSN) XCTREE (INSN, 3, NOTE)
635#define NOTE_EH_HANDLER(INSN) XCINT (INSN, 3, NOTE)
636#define NOTE_RANGE_INFO(INSN) XCEXP (INSN, 3, NOTE)
637#define NOTE_LIVE_INFO(INSN) XCEXP (INSN, 3, NOTE)
638#define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 3, NOTE)
639#define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 3, NOTE)
0dfa1860 640
6f29feb1
JW		 641/* In a NOTE that is a line number, this is the line number.
642 Other kinds of NOTEs are identified by negative numbers here. */
f52eda29 643#define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 4, NOTE)
6f29feb1 644
589ca5cb
MM		 645/* Nonzero if INSN is a note marking the beginning of a basic block. */
646#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
647 (GET_CODE (INSN) == NOTE \
648 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
649
6f29feb1 650/* Codes that appear in the NOTE_LINE_NUMBER field
a31efb86 651 for kinds of notes that are not line numbers.
6f29feb1 652
a31efb86
DE		 653 Notice that we do not try to use zero here for any of
654 the special note codes because sometimes the source line
655 actually can be zero! This happens (for example) when we
656 are generating code for the per-translation-unit constructor
657 and destructor routines for some C++ translation unit.
658
659 If you should change any of the following values, or if you
660 should add a new value here, don't forget to change the
661 note_insn_name array in rtl.c. */
6f29feb1 662
d636c18c
RH		 663enum insn_note
664{
665 /* Keep all of these numbers negative. Adjust as needed. */
666 NOTE_INSN_BIAS = -100,
667
668 /* This note is used to get rid of an insn
669 when it isn't safe to patch the insn out of the chain. */
670 NOTE_INSN_DELETED,
671
672 /* These are used to mark the beginning and end of a lexical block.
673 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
674 NOTE_INSN_BLOCK_BEG,
675 NOTE_INSN_BLOCK_END,
676
677 /* These mark the extremes of a loop. */
678 NOTE_INSN_LOOP_BEG,
679 NOTE_INSN_LOOP_END,
680
681 /* Generated at the place in a loop that `continue' jumps to. */
682 NOTE_INSN_LOOP_CONT,
683 /* Generated at the start of a duplicated exit test. */
684 NOTE_INSN_LOOP_VTOP,
685
e803a64b
RH		 686 /* Generated at the end of a conditional at the top of the loop.
687 This is used to perform a lame form of loop rotation in lieu
688 of actually understanding the loop structure. The note is
689 discarded after rotation is complete. */
690 NOTE_INSN_LOOP_END_TOP_COND,
691
d636c18c
RH		 692 /* This kind of note is generated at the end of the function body,
693 just before the return insn or return label. In an optimizing
694 compilation it is deleted by the first jump optimization, after
695 enabling that optimizer to determine whether control can fall
696 off the end of the function body without a return statement. */
697 NOTE_INSN_FUNCTION_END,
698
d636c18c
RH		 699 /* This marks the point immediately after the last prologue insn. */
700 NOTE_INSN_PROLOGUE_END,
701
702 /* This marks the point immediately prior to the first epilogue insn. */
703 NOTE_INSN_EPILOGUE_BEG,
704
705 /* Generated in place of user-declared labels when they are deleted. */
706 NOTE_INSN_DELETED_LABEL,
707
708 /* This note indicates the start of the real body of the function,
709 i.e. the point just after all of the parms have been moved into
710 their homes, etc. */
711 NOTE_INSN_FUNCTION_BEG,
712
713 /* These note where exception handling regions begin and end.
714 Uses NOTE_EH_HANDLER to identify the region in question. */
715 NOTE_INSN_EH_REGION_BEG,
716 NOTE_INSN_EH_REGION_END,
717
718 /* Generated whenever a duplicate line number note is output. For example,
719 one is output after the end of an inline function, in order to prevent
eebedaa5 720 the line containing the inline call from being counted twice in gcov. */
b3b42a4d 721 NOTE_INSN_REPEATED_LINE_NUMBER,
d636c18c
RH		 722
723 /* Start/end of a live range region, where pseudos allocated on the stack
724 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
b3b42a4d 725 NOTE_INSN_RANGE_BEG,
d636c18c
RH		 726 NOTE_INSN_RANGE_END,
727
728 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
729 NOTE_INSN_LIVE,
730
eebedaa5 731 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
d636c18c
RH		 732 NOTE_INSN_BASIC_BLOCK,
733
994a57cd
RH		 734 /* Record the expected value of a register at a location. Uses
735 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
736 NOTE_INSN_EXPECTED_VALUE,
737
d636c18c
RH		 738 NOTE_INSN_MAX
739};
10f07067 740
6f29feb1
JW		 741/* Names for NOTE insn's other than line numbers. */
742
d636c18c
RH		 743extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
744#define GET_NOTE_INSN_NAME(NOTE_CODE) \
dbbbbf3b 745 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
6f29feb1
JW		 746
747/* The name of a label, in case it corresponds to an explicit label
748 in the input source code. */
f52eda29 749#define LABEL_NAME(RTX) XCSTR (RTX, 6, CODE_LABEL)
6f29feb1
JW		 750
751/* In jump.c, each label contains a count of the number
752 of LABEL_REFs that point at it, so unused labels can be deleted. */
f52eda29 753#define LABEL_NUSES(RTX) XCINT (RTX, 3, CODE_LABEL)
6f29feb1 754
8cd0faaf 755/* Associate a name with a CODE_LABEL. */
f52eda29 756#define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
8cd0faaf 757
e9a25f70 758/* The original regno this ADDRESSOF was built for. */
f52eda29 759#define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
e9a25f70
JL		 760
761/* The variable in the register we took the address of. */
f52eda29 762#define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
e9a25f70 763
6f29feb1
JW		 764/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
765 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
766 be decremented and possibly the label can be deleted. */
f52eda29 767#define JUMP_LABEL(INSN) XCEXP (INSN, 7, JUMP_INSN)
6f29feb1
JW		 768
769/* Once basic blocks are found in flow.c,
770 each CODE_LABEL starts a chain that goes through
771 all the LABEL_REFs that jump to that label.
be1bb652 772 The chain eventually winds up at the CODE_LABEL: it is circular. */
f52eda29 773#define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
6f29feb1
JW		 774\f
775/* This is the field in the LABEL_REF through which the circular chain
776 of references to a particular label is linked.
777 This chain is set up in flow.c. */
778
f52eda29 779#define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
6f29feb1
JW		 780
781/* Once basic blocks are found in flow.c,
782 Each LABEL_REF points to its containing instruction with this field. */
783
f52eda29 784#define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
6f29feb1 785
08394eef
BS		 786/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
787 the number the register originally had; for a pseudo register turned into
788 a hard reg this will hold the old pseudo register number. */
6f29feb1 789
f52eda29
GS		 790#define REGNO(RTX) XCUINT (RTX, 0, REG)
791#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
6f29feb1
JW		 792
793/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
794 is the current function's return value. */
795
796#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
797
798/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
799#define REG_USERVAR_P(RTX) ((RTX)->volatil)
800
3502dc9c
JDA		 801/* 1 in a REG rtx if the register is a pointer. */
802#define REG_POINTER(RTX) ((RTX)->frame_related)
803
cdbca172
JO		 804/* 1 if the given register REG corresponds to a hard register. */
805#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
806
807/* 1 if the given register number REG_NO corresponds to a hard register. */
f52eda29 808#define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
cdbca172 809
6f29feb1
JW		 810/* For a CONST_INT rtx, INTVAL extracts the integer. */
811
83ab3839 812#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
6f29feb1 813
a36556a8
ZW		 814/* For a CONST_DOUBLE:
815 The usual two ints that hold the value.
816 For a DImode, that is all there are;
817 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
818 For a float, the number of ints varies,
819 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
820 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
a79e3a45
RK		 821#define CONST_DOUBLE_LOW(r) XCWINT (r, 1, CONST_DOUBLE)
822#define CONST_DOUBLE_HIGH(r) XCWINT (r, 2, CONST_DOUBLE)
a36556a8
ZW		 823
824/* Link for chain of all CONST_DOUBLEs in use in current function. */
a79e3a45 825#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 0, CONST_DOUBLE)
a36556a8 826
69ef87e2
AH		 827/* For a CONST_VECTOR, return element #n. */
828#define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
829
830/* For a CONST_VECTOR, return the number of elements in a vector. */
831#define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
832
6f29feb1 833/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
ddef6bc7 834 SUBREG_BYTE extracts the byte-number. */
6f29feb1 835
f52eda29
GS		 836#define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
837#define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
ddef6bc7
JJ		 838
839/* in rtlanal.c */
33aceff2 840extern unsigned int subreg_lsb PARAMS ((rtx));
ddef6bc7
JJ		 841extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
842 enum machine_mode,
843 unsigned int,
844 enum machine_mode));
845extern unsigned int subreg_regno PARAMS ((rtx));
6f29feb1 846
07be3989
RK		 847/* 1 if the REG contained in SUBREG_REG is already known to be
848 sign- or zero-extended from the mode of the SUBREG to the mode of
849 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
f590cca1 850 extension.
07be3989
RK		 851
852 When used as a LHS, is means that this extension must be done
853 when assigning to SUBREG_REG. */
854
855#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
856#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
857
6f29feb1
JW		 858/* Access various components of an ASM_OPERANDS rtx. */
859
f52eda29
GS		 860#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
861#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
862#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
863#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
864#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
865#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
866#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
6462bb43 867#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
f52eda29 868 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
3bdf5ad1 869#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
f52eda29 870 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
3bdf5ad1 871#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
f52eda29
GS		 872 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
873#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
874#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
6f29feb1 875
10b76d73
RK		 876/* For a MEM RTX, 1 if we should keep the alias set for this mem
877 unchanged when we access a component. Set to 1, or example, when we
878 are already in a non-addressable component of an aggregate. */
879#define MEM_KEEP_ALIAS_SET_P(RTX) ((RTX)->jump)
880
6f29feb1
JW		 881/* For a MEM rtx, 1 if it's a volatile reference.
882 Also in an ASM_OPERANDS rtx. */
883#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
884
3bdf5ad1
RK		 885/* For a MEM rtx, 1 if it refers to an aggregate, either to the
886 aggregate itself of to a field of the aggregate. If zero, RTX may
4eb00163 887 or may not be such a reference. */
6f29feb1
JW		 888#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
889
c6df88cb 890/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
3ef42a0c 891 not refer to a scalar. */
c6df88cb
MM		 892#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
893
c6df88cb
MM		 894/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
895 RTX. Otherwise, vice versa. Use this macro only when you are
896 *sure* that you know that the MEM is in a structure, or is a
897 scalar. VAL is evaluated only once. */
f52eda29
GS		 898#define MEM_SET_IN_STRUCT_P(RTX, VAL) \
899do { \
f9e158c3
JM		 900 if (VAL) \
901 { \
902 MEM_IN_STRUCT_P (RTX) = 1; \
903 MEM_SCALAR_P (RTX) = 0; \
904 } \
905 else \
906 { \
907 MEM_IN_STRUCT_P (RTX) = 0; \
908 MEM_SCALAR_P (RTX) = 1; \
909 } \
910} while (0)
c6df88cb 911
173b24b9
RK		 912/* The memory attribute block. We provide access macros for each value
913 in the block and provide defaults if none specified. */
914#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
915
41472af8
MM		 916/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
917 set, and may alias anything. Otherwise, the MEM can only alias
918 MEMs in the same alias set. This value is set in a
919 language-dependent manner in the front-end, and should not be
920 altered in the back-end. These set numbers are tested for zero,
921 and compared for equality; they have no other significance. In
922 some front-ends, these numbers may correspond in some way to types,
923 or other language-level entities, but they need not, and the
924 back-end makes no such assumptions. */
173b24b9
RK		 925#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
926
927/* For a MEM rtx, the decl it is known to refer to, if it is known to
998d7deb
RH		 928 refer to part of a DECL. It may also be a COMPONENT_REF. */
929#define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
173b24b9 930
998d7deb 931/* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
173b24b9
RK		 932 RTX that is always a CONST_INT. */
933#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
934
935/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
936 is always a CONST_INT. */
10b76d73
RK		 937#define MEM_SIZE(RTX) \
938(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
939 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
940 : 0)
173b24b9 941
917afb0c
RK		 942/* For a MEM rtx, the alignment in bits. We can use the alignment of the
943 mode as a default when STRICT_ALIGNMENT, but not if not. */
8ac61af7
RK		 944#define MEM_ALIGN(RTX) \
945(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
917afb0c
RK		 946 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
947 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
3bdf5ad1
RK		 948
949/* Copy the attributes that apply to memory locations from RHS to LHS. */
10b76d73
RK		 950#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
951 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
952 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
953 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
954 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
955 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
173b24b9 956 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
41472af8 957
6f29feb1
JW		 958/* For a LABEL_REF, 1 means that this reference is to a label outside the
959 loop containing the reference. */
960#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
961
adfaf10a 962/* For a LABEL_REF, 1 means it is for a nonlocal label. */
2a406d2a 963/* Likewise in an EXPR_LIST for a REG_LABEL note. */
adfaf10a
RS		 964#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
965
6f29feb1
JW		 966/* For a CODE_LABEL, 1 means always consider this label to be needed. */
967#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
968
969/* For a REG, 1 means the register is used only in an exit test of a loop. */
970#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
971
972/* During sched, for an insn, 1 means that the insn must be scheduled together
d45cf215 973 with the preceding insn. */
6f29feb1
JW		 974#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
975
b8ec5764
VM		 976/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
977 cost of the dependence link. The cost of executing an instruction
978 may vary based on how the results are used. LINK_COST_ZERO is 1 when
979 the cost through the link varies and is unchanged (i.e., the link has
980 zero additional cost). LINK_COST_FREE is 1 when the cost through the
981 link is zero (i.e., the link makes the cost free). In other cases,
982 the adjustment to the cost is recomputed each time it is needed. */
983#define LINK_COST_ZERO(X) ((X)->jump)
984#define LINK_COST_FREE(X) ((X)->call)
985
6f29feb1
JW		 986/* For a SET rtx, SET_DEST is the place that is set
987 and SET_SRC is the value it is set to. */
83ab3839
RH		 988#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
989#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
3258e996 990#define SET_IS_RETURN_P(RTX) ((RTX)->jump)
6f29feb1
JW		 991
992/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
f52eda29
GS		 993#define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
994#define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
6f29feb1 995
0c99ec5c
RH		 996/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
997 conditionally executing the code on, COND_EXEC_CODE is the code
998 to execute if the condition is true. */
f52eda29
GS		 999#define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1000#define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
0c99ec5c 1001
6f29feb1
JW		 1002/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
1003#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
1004
bd7cf17e
JJ		 1005/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
1006#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
1007
6f29feb1
JW		 1008/* Flag in a SYMBOL_REF for machine-specific purposes. */
1009#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
1010
1011/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
1012#define SYMBOL_REF_USED(RTX) ((RTX)->used)
1013
ff0b6b99
FS		 1014/* 1 means a SYMBOL_REF is weak. */
1015#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
1016
6f29feb1
JW		 1017/* Define a macro to look for REG_INC notes,
1018 but save time on machines where they never exist. */
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))
f52eda29
GS		 1022#define FIND_REG_INC_NOTE(INSN, REG) \
1023 ((REG) != NULL_RTX && REG_P ((REG)) \
1024 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1025 : find_reg_note ((INSN), REG_INC, (REG)))
6f29feb1 1026#else
f52eda29 1027#define FIND_REG_INC_NOTE(INSN, REG) 0
6f29feb1
JW		 1028#endif
1029
1030/* Indicate whether the machine has any sort of auto increment addressing.
1031 If not, we can avoid checking for REG_INC notes. */
1032
58e54c44
RS		 1033/* Don't continue this line--convex cc version 4.1 would lose. */
1034#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 1035#define AUTO_INC_DEC
1036#endif
0dfa1860 1037
940da324
JL		 1038#ifndef HAVE_PRE_INCREMENT
1039#define HAVE_PRE_INCREMENT 0
1040#endif
1041
1042#ifndef HAVE_PRE_DECREMENT
1043#define HAVE_PRE_DECREMENT 0
1044#endif
1045
1046#ifndef HAVE_POST_INCREMENT
1047#define HAVE_POST_INCREMENT 0
1048#endif
1049
1050#ifndef HAVE_POST_DECREMENT
1051#define HAVE_POST_DECREMENT 0
1052#endif
1053
4b983fdc
RH		 1054#ifndef HAVE_POST_MODIFY_DISP
1055#define HAVE_POST_MODIFY_DISP 0
1056#endif
1057
1058#ifndef HAVE_POST_MODIFY_REG
1059#define HAVE_POST_MODIFY_REG 0
1060#endif
1061
1062#ifndef HAVE_PRE_MODIFY_DISP
1063#define HAVE_PRE_MODIFY_DISP 0
1064#endif
1065
1066#ifndef HAVE_PRE_MODIFY_REG
1067#define HAVE_PRE_MODIFY_REG 0
1068#endif
1069
6e01bd94
MH		 1070
1071/* Some architectures do not have complete pre/post increment/decrement
1072 instruction sets, or only move some modes efficiently. These macros
1073 allow us to tune autoincrement generation. */
1074
1075#ifndef USE_LOAD_POST_INCREMENT
1076#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1077#endif
1078
1079#ifndef USE_LOAD_POST_DECREMENT
1080#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1081#endif
1082
1083#ifndef USE_LOAD_PRE_INCREMENT
1084#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1085#endif
1086
1087#ifndef USE_LOAD_PRE_DECREMENT
1088#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1089#endif
1090
1091#ifndef USE_STORE_POST_INCREMENT
1092#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1093#endif
1094
1095#ifndef USE_STORE_POST_DECREMENT
1096#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1097#endif
1098
1099#ifndef USE_STORE_PRE_INCREMENT
1100#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1101#endif
1102
1103#ifndef USE_STORE_PRE_DECREMENT
1104#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1105#endif
1106
1107
0dfa1860
MM		 1108/* Accessors for RANGE_INFO. */
1109/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1110#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
0dfa1860
MM		 1111
1112/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1113#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
0dfa1860
MM		 1114
1115/* For RANGE_{START,END} notes, return the vector containing the registers used
1116 in the range. */
83ab3839
RH		 1117#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1118#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1119#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
0dfa1860
MM		 1120
1121/* For RANGE_{START,END} notes, the number of calls within the range. */
83ab3839 1122#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
0dfa1860
MM		 1123
1124/* For RANGE_{START,END} notes, the number of insns within the range. */
83ab3839 1125#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
0dfa1860
MM		 1126
1127/* For RANGE_{START,END} notes, a unique # to identify this range. */
83ab3839 1128#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
0dfa1860 1129
eebedaa5 1130/* For RANGE_{START,END} notes, the basic block # the range starts with. */
83ab3839 1131#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
0dfa1860 1132
eebedaa5 1133/* For RANGE_{START,END} notes, the basic block # the range ends with. */
83ab3839 1134#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
0dfa1860
MM		 1135
1136/* For RANGE_{START,END} notes, the loop depth the range is in. */
83ab3839 1137#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
0dfa1860
MM		 1138
1139/* For RANGE_{START,END} notes, the bitmap of live registers at the start
1140 of the range. */
83ab3839 1141#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
0dfa1860
MM		 1142
1143/* For RANGE_{START,END} notes, the bitmap of live registers at the end
1144 of the range. */
83ab3839 1145#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
0dfa1860
MM		 1146
1147/* For RANGE_START notes, the marker # of the start of the range. */
83ab3839 1148#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
0dfa1860
MM		 1149
1150/* For RANGE_START notes, the marker # of the end of the range. */
83ab3839 1151#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
0dfa1860
MM		 1152
1153/* Original pseudo register # for a live range note. */
83ab3839 1154#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
0dfa1860
MM		 1155
1156/* Pseudo register # original register is copied into or -1. */
83ab3839 1157#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
0dfa1860
MM		 1158
1159/* How many times a register in a live range note was referenced. */
83ab3839 1160#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
0dfa1860
MM		 1161
1162/* How many times a register in a live range note was set. */
83ab3839 1163#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
0dfa1860
MM		 1164
1165/* How many times a register in a live range note died. */
83ab3839 1166#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
0dfa1860
MM		 1167
1168/* Whether the original value is needed to be copied into the range register at
eebedaa5 1169 the start of the range. */
83ab3839 1170#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
0dfa1860
MM		 1171
1172/* # of insns the register copy is live over. */
83ab3839 1173#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
0dfa1860
MM		 1174
1175/* # of calls the register copy is live over. */
83ab3839 1176#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
0dfa1860
MM		 1177
1178/* DECL_NODE pointer of the declaration if the register is a user defined
1179 variable. */
83ab3839 1180#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
0dfa1860
MM		 1181
1182/* BLOCK_NODE pointer to the block the variable is declared in if the
1183 register is a user defined variable. */
83ab3839 1184#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
0dfa1860
MM		 1185
1186/* EXPR_LIST of the distinct ranges a variable is in. */
1187#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1188
1189/* Block a variable is declared in. */
1190#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1191
1192/* # of distinct ranges a variable is in. */
1193#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1194
1195/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1196#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1197
1198/* For a NOTE_INSN_LIVE note, the original basic block number. */
1199#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
4e872036
AS		 1200
1201/* Determine if the insn is a PHI node. */
1202#define PHI_NODE_P(X) \
f52eda29 1203 ((X) && GET_CODE (X) == INSN \
4e872036
AS		 1204 && GET_CODE (PATTERN (X)) == SET \
1205 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
6f29feb1 1206\f
bf6bb899
BS		 1207/* Nonzero if we need to distinguish between the return value of this function
1208 and the return value of a function called by this function. This helps
1209 integrate.c.
1210 This is 1 until after the rtl generation pass. */
1211extern int rtx_equal_function_value_matters;
1212
1b3d8f8a
GK		 1213/* Nonzero when we are generating CONCATs. */
1214extern int generating_concat_p;
1215
6f29feb1
JW		 1216/* Generally useful functions. */
1217
ac957f13 1218/* In expmed.c */
cdadb1dd 1219extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
5f4f0e22 1220
f52eda29 1221#define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
5f4f0e22 1222
5f2d6cfa 1223/* In builtins.c */
2f78c311 1224extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
5f2d6cfa 1225
50b2596f 1226/* In explow.c */
c6991660 1227extern void set_stack_check_libfunc PARAMS ((rtx));
cdadb1dd 1228extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
7e4ce834 1229 enum machine_mode));
cdadb1dd
KG		 1230extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1231extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1232extern void optimize_save_area_alloca PARAMS ((rtx));
5f4f0e22 1233
4eb00163 1234/* In emit-rtl.c */
cdadb1dd 1235extern rtx gen_rtx PARAMS ((enum rtx_code,
bdea67fa 1236 enum machine_mode, ...));
cdadb1dd 1237extern rtvec gen_rtvec PARAMS ((int, ...));
cdadb1dd
KG		 1238extern rtx copy_insn_1 PARAMS ((rtx));
1239extern rtx copy_insn PARAMS ((rtx));
4eb00163
JO		 1240
1241/* In rtl.c */
5fe2e41b
GK		 1242extern rtx rtx_alloc PARAMS ((RTX_CODE));
1243extern rtvec rtvec_alloc PARAMS ((int));
cdadb1dd 1244extern rtx copy_rtx PARAMS ((rtx));
4eb00163
JO		 1245
1246/* In emit-rtl.c */
cdadb1dd 1247extern rtx copy_rtx_if_shared PARAMS ((rtx));
4eb00163
JO		 1248
1249/* In rtl.c */
cdadb1dd
KG		 1250extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1251extern rtx shallow_copy_rtx PARAMS ((rtx));
1252extern int rtx_equal_p PARAMS ((rtx, rtx));
4eb00163
JO		 1253
1254/* In emit-rtl.c */
cdadb1dd
KG		 1255extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1256extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1257extern rtx gen_label_rtx PARAMS ((void));
ddef6bc7 1258extern int subreg_hard_regno PARAMS ((rtx, int));
cdadb1dd
KG		 1259extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1260extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1261
1262/* In cse.c */
cdadb1dd 1263extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1264
1265/* In emit-rtl.c */
cdadb1dd 1266extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
5222e470
JH		 1267extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1268 enum machine_mode, rtx));
cdadb1dd
KG		 1269extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1270extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
770ae6cc
RK		 1271extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1272 enum machine_mode));
ddef6bc7
JJ		 1273extern rtx constant_subword PARAMS ((rtx, int,
1274 enum machine_mode));
4eb00163
JO		 1275
1276/* In emit-rtl.c */
770ae6cc
RK		 1277extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1278 enum machine_mode));
cdadb1dd 1279extern int subreg_lowpart_p PARAMS ((rtx));
e0e08ac2
JH		 1280extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1281 enum machine_mode));
1282extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1283 enum machine_mode));
cdadb1dd
KG		 1284extern rtx make_safe_from PARAMS ((rtx, rtx));
1285extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
cdadb1dd
KG		 1286extern rtx get_insns PARAMS ((void));
1287extern const char *get_insn_name PARAMS ((int));
1288extern rtx get_last_insn PARAMS ((void));
1289extern rtx get_last_insn_anywhere PARAMS ((void));
1290extern void start_sequence PARAMS ((void));
1291extern void push_to_sequence PARAMS ((rtx));
1292extern void end_sequence PARAMS ((void));
c14f7160
ML		 1293extern void push_to_full_sequence PARAMS ((rtx, rtx));
1294extern void end_full_sequence PARAMS ((rtx*, rtx*));
cdadb1dd 1295extern rtx gen_sequence PARAMS ((void));
4eb00163
JO		 1296
1297/* In varasm.c */
cdadb1dd 1298extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
03f54026 1299extern rtx mem_for_const_double PARAMS ((rtx));
cdadb1dd 1300extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
4eb00163 1301
4eb00163 1302/* In varasm.c */
cdadb1dd 1303extern rtx get_pool_constant PARAMS ((rtx));
149d6f9e 1304extern rtx get_pool_constant_mark PARAMS ((rtx, bool *));
cdadb1dd
KG		 1305extern enum machine_mode get_pool_mode PARAMS ((rtx));
1306extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1307extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1308extern int get_pool_offset PARAMS ((rtx));
1309extern rtx simplify_subtraction PARAMS ((rtx));
4eb00163
JO		 1310
1311/* In function.c */
cdadb1dd 1312extern rtx assign_stack_local PARAMS ((enum machine_mode,
e5e809f4 1313 HOST_WIDE_INT, int));
cdadb1dd 1314extern rtx assign_stack_temp PARAMS ((enum machine_mode,
e5e809f4 1315 HOST_WIDE_INT, int));
a06ef755
RK		 1316extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode,
1317 HOST_WIDE_INT, int, tree));
2f78c311 1318extern rtx assign_temp PARAMS ((tree, int, int, int));
4eb00163 1319/* In emit-rtl.c */
cdadb1dd
KG		 1320extern rtx emit_insn_before PARAMS ((rtx, rtx));
1321extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1322extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1323extern rtx emit_barrier_before PARAMS ((rtx));
1324extern rtx emit_label_before PARAMS ((rtx, rtx));
1325extern rtx emit_note_before PARAMS ((int, rtx));
1326extern rtx emit_insn_after PARAMS ((rtx, rtx));
1327extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1328extern rtx emit_barrier_after PARAMS ((rtx));
1329extern rtx emit_label_after PARAMS ((rtx, rtx));
1330extern rtx emit_note_after PARAMS ((int, rtx));
3cce094d 1331extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
cdadb1dd
KG		 1332extern rtx emit_insn PARAMS ((rtx));
1333extern rtx emit_insns PARAMS ((rtx));
1334extern rtx emit_insns_before PARAMS ((rtx, rtx));
1335extern rtx emit_insns_after PARAMS ((rtx, rtx));
1336extern rtx emit_jump_insn PARAMS ((rtx));
1337extern rtx emit_call_insn PARAMS ((rtx));
1338extern rtx emit_label PARAMS ((rtx));
1339extern rtx emit_barrier PARAMS ((void));
3cce094d
KG		 1340extern rtx emit_line_note PARAMS ((const char *, int));
1341extern rtx emit_note PARAMS ((const char *, int));
1342extern rtx emit_line_note_force PARAMS ((const char *, int));
cdadb1dd
KG		 1343extern rtx make_insn_raw PARAMS ((rtx));
1344extern rtx previous_insn PARAMS ((rtx));
1345extern rtx next_insn PARAMS ((rtx));
1346extern rtx prev_nonnote_insn PARAMS ((rtx));
1347extern rtx next_nonnote_insn PARAMS ((rtx));
1348extern rtx prev_real_insn PARAMS ((rtx));
1349extern rtx next_real_insn PARAMS ((rtx));
1350extern rtx prev_active_insn PARAMS ((rtx));
1351extern rtx next_active_insn PARAMS ((rtx));
69732dcb 1352extern int active_insn_p PARAMS ((rtx));
cdadb1dd
KG		 1353extern rtx prev_label PARAMS ((rtx));
1354extern rtx next_label PARAMS ((rtx));
1355extern rtx next_cc0_user PARAMS ((rtx));
1356extern rtx prev_cc0_setter PARAMS ((rtx));
4eb00163
JO		 1357
1358/* In jump.c */
cdadb1dd
KG		 1359extern rtx next_nondeleted_insn PARAMS ((rtx));
1360extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
7913f3d0 1361extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
cdadb1dd
KG		 1362extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1363extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1364extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1e5fd094 1365extern void mark_jump_label PARAMS ((rtx, rtx, int));
01f62f01 1366extern void cleanup_barriers PARAMS ((void));
4eb00163 1367
4eb00163 1368/* In jump.c */
2b7d71b2 1369extern bool squeeze_notes PARAMS ((rtx *, rtx *));
53c17031 1370extern rtx delete_related_insns PARAMS ((rtx));
cdadb1dd
KG		 1371extern void delete_jump PARAMS ((rtx));
1372extern void delete_barrier PARAMS ((rtx));
1373extern rtx get_label_before PARAMS ((rtx));
1374extern rtx get_label_after PARAMS ((rtx));
1375extern rtx follow_jumps PARAMS ((rtx));
4eb00163
JO		 1376
1377/* In recog.c */
b72f00af 1378extern rtx *find_constant_term_loc PARAMS ((rtx *));
4eb00163
JO		 1379
1380/* In emit-rtl.c */
cdadb1dd 1381extern rtx try_split PARAMS ((rtx, rtx, int));
6b24c259 1382extern int split_branch_probability;
4eb00163
JO		 1383
1384/* In unknown file */
cdadb1dd 1385extern rtx split_insns PARAMS ((rtx, rtx));
4eb00163
JO		 1386
1387/* In simplify-rtx.c */
d9c695ff
RK		 1388extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1389 enum machine_mode, rtx,
1390 enum machine_mode));
1391extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1392 enum machine_mode, rtx,
1393 rtx));
1394extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1395 enum machine_mode,
1396 enum machine_mode, rtx, rtx,
1397 rtx));
1398extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1399 enum machine_mode, rtx,
1400 rtx));
1401extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1402 enum machine_mode,
1403 rtx, rtx));
1404extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1405 enum machine_mode, rtx,
1406 enum machine_mode));
1407extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1408 enum machine_mode,
1409 enum machine_mode,
1410 rtx, rtx, rtx));
1411extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
141e454b 1412 enum machine_mode,
d9c695ff
RK		 1413 enum machine_mode,
1414 rtx, rtx));
eea50aa0
JH		 1415extern rtx simplify_subreg PARAMS ((enum machine_mode,
1416 rtx,
1417 enum machine_mode,
1418 unsigned int));
949c5d62
JH		 1419extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1420 rtx,
1421 enum machine_mode,
1422 unsigned int));
d9c695ff 1423extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
cdadb1dd 1424extern rtx simplify_rtx PARAMS ((rtx));
732910b9 1425extern rtx avoid_constant_pool_reference PARAMS ((rtx));
4eb00163 1426
4eb00163 1427/* In function.c */
2f78c311 1428extern rtx gen_mem_addressof PARAMS ((rtx, tree));
4eb00163 1429
4eb00163 1430/* In regclass.c */
770ae6cc
RK		 1431extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1432 unsigned int));
4eb00163
JO		 1433
1434/* In emit-rtl.c */
3d238248 1435extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
9ae8ffe7 1436
e9a25f70
JL		 1437/* Functions in rtlanal.c */
1438
b1cdafbb
JH		 1439/* Single set is implemented as macro for performance reasons. */
1440#define single_set(I) (INSN_P (I) \
1441 ? (GET_CODE (PATTERN (I)) == SET \
1442 ? PATTERN (I) : single_set_1 (I)) \
1443 : NULL_RTX)
2130b7fb 1444#define single_set_1(I) single_set_2 (I, PATTERN (I))
b1cdafbb 1445
e38fe8e0 1446extern int rtx_addr_can_trap_p PARAMS ((rtx));
cdadb1dd 1447extern int rtx_unstable_p PARAMS ((rtx));
e38fe8e0
BS		 1448extern int rtx_varies_p PARAMS ((rtx, int));
1449extern int rtx_addr_varies_p PARAMS ((rtx, int));
cdadb1dd
KG		 1450extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1451extern rtx get_related_value PARAMS ((rtx));
d644189f 1452extern rtx get_jump_table_offset PARAMS ((rtx, rtx *));
cdadb1dd 1453extern int reg_mentioned_p PARAMS ((rtx, rtx));
4b983fdc 1454extern int count_occurrences PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1455extern int reg_referenced_p PARAMS ((rtx, rtx));
1456extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1457extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1458extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1459extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
9b3bd424 1460extern int commutative_operand_precedence PARAMS ((rtx));
e5c56fd9 1461extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1462extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1463extern int no_labels_between_p PARAMS ((rtx, rtx));
1464extern int no_jumps_between_p PARAMS ((rtx, rtx));
1465extern int modified_in_p PARAMS ((rtx, rtx));
4eb00163 1466extern int insn_dependent_p PARAMS ((rtx, rtx));
cdadb1dd 1467extern int reg_set_p PARAMS ((rtx, rtx));
2130b7fb 1468extern rtx single_set_2 PARAMS ((rtx, rtx));
cdadb1dd 1469extern int multiple_sets PARAMS ((rtx));
7142e318 1470extern int set_noop_p PARAMS ((rtx));
0005550b 1471extern int noop_move_p PARAMS ((rtx));
cdadb1dd 1472extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
770ae6cc
RK		 1473extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1474 rtx, rtx *));
cdadb1dd 1475extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
91b2d119 1476extern rtx set_of PARAMS ((rtx, rtx));
770ae6cc
RK		 1477extern void note_stores PARAMS ((rtx,
1478 void (*) (rtx, rtx, void *),
1479 void *));
e2373f95
RK		 1480extern void note_uses PARAMS ((rtx *,
1481 void (*) (rtx *, void *),
1482 void *));
cdadb1dd
KG		 1483extern rtx reg_set_last PARAMS ((rtx, rtx));
1484extern int dead_or_set_p PARAMS ((rtx, rtx));
770ae6cc 1485extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
cdadb1dd 1486extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
770ae6cc
RK		 1487extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1488 unsigned int));
d9c695ff 1489extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
cdadb1dd 1490extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
770ae6cc
RK		 1491extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1492 unsigned int));
cdadb1dd
KG		 1493extern void remove_note PARAMS ((rtx, rtx));
1494extern int side_effects_p PARAMS ((rtx));
1495extern int volatile_refs_p PARAMS ((rtx));
1496extern int volatile_insn_p PARAMS ((rtx));
1497extern int may_trap_p PARAMS ((rtx));
1498extern int inequality_comparisons_p PARAMS ((rtx));
1499extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
770ae6cc
RK		 1500extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1501 int));
cdadb1dd
KG		 1502extern int computed_jump_p PARAMS ((rtx));
1503typedef int (*rtx_function) PARAMS ((rtx *, void *));
1504extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
770ae6cc 1505extern rtx regno_use_in PARAMS ((unsigned int, rtx));
cdadb1dd 1506extern int auto_inc_p PARAMS ((rtx));
5f0d2358 1507extern int in_expr_list_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1508extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1509extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
db7ba742 1510extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
833366d6 1511extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
6f29feb1 1512
ae0b51ef
JL		 1513/* flow.c */
1514
cdadb1dd
KG		 1515extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1516void init_EXPR_INSN_LIST_cache PARAMS ((void));
1517void free_EXPR_LIST_list PARAMS ((rtx *));
1518void free_INSN_LIST_list PARAMS ((rtx *));
1519void free_EXPR_LIST_node PARAMS ((rtx));
1520void free_INSN_LIST_node PARAMS ((rtx));
1521rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1522rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
ae0b51ef
JL		 1523
1524/* regclass.c */
1525
6f29feb1
JW		 1526/* Maximum number of parallel sets and clobbers in any insn in this fn.
1527 Always at least 3, since the combiner could put that many togetherm
1528 and we want this to remain correct for all the remaining passes. */
1529
1530extern int max_parallel;
1531
e0c6d139 1532/* Free up register info memory. */
cdadb1dd 1533extern void free_reg_info PARAMS ((void));
e0c6d139 1534
ae0b51ef 1535/* recog.c */
cdadb1dd 1536extern int asm_noperands PARAMS ((rtx));
3cce094d 1537extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
9b3142b3
KG		 1538 const char **,
1539 enum machine_mode *));
6f29feb1 1540
cdadb1dd
KG		 1541extern enum reg_class reg_preferred_class PARAMS ((int));
1542extern enum reg_class reg_alternate_class PARAMS ((int));
6f29feb1 1543
cdadb1dd 1544extern rtx get_first_nonparm_insn PARAMS ((void));
6f29feb1 1545
cdadb1dd 1546extern void split_all_insns PARAMS ((int));
6f862f2f 1547extern void split_all_insns_noflow PARAMS ((void));
6a73406e 1548
68d75312 1549#define MAX_SAVED_CONST_INT 64
5da077de 1550extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
68d75312 1551
5da077de
AS		 1552#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1553#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1554#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1555#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
6f29feb1 1556extern rtx const_true_rtx;
a8efe40d
RK		 1557
1558extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1559
f590cca1 1560/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
a8efe40d
RK		 1561 same as VOIDmode. */
1562
1563#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1564
1565/* Likewise, for the constants 1 and 2. */
1566
1567#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1568#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
6f29feb1 1569
5da077de
AS		 1570/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1571 is used to represent the frame pointer. This is because the
1572 hard frame pointer and the automatic variables are separated by an amount
1573 that cannot be determined until after register allocation. We can assume
1574 that in this case ELIMINABLE_REGS will be defined, one action of which
eebedaa5 1575 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
5da077de
AS		 1576#ifndef HARD_FRAME_POINTER_REGNUM
1577#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1578#endif
1579
1580/* Index labels for global_rtl. */
1581enum global_rtl_index
68d75312 1582{
5da077de
AS		 1583 GR_PC,
1584 GR_CC0,
1585 GR_STACK_POINTER,
1586 GR_FRAME_POINTER,
1587/* For register elimination to work properly these hard_frame_pointer_rtx,
1588 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1589 the same register. */
1590#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1591 GR_ARG_POINTER = GR_FRAME_POINTER,
1592#endif
1593#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1594 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1595#else
1596 GR_HARD_FRAME_POINTER,
1597#endif
1598#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1599#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1600 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1601#else
1602 GR_ARG_POINTER,
1603#endif
1604#endif
1605 GR_VIRTUAL_INCOMING_ARGS,
1606 GR_VIRTUAL_STACK_ARGS,
1607 GR_VIRTUAL_STACK_DYNAMIC,
1608 GR_VIRTUAL_OUTGOING_ARGS,
1609 GR_VIRTUAL_CFA,
1610
1611 GR_MAX
1612};
1613
1614/* Pointers to standard pieces of rtx are stored here. */
1615extern rtx global_rtl[GR_MAX];
1616
1617/* Standard pieces of rtx, to be substituted directly into things. */
1618#define pc_rtx (global_rtl[GR_PC])
1619#define cc0_rtx (global_rtl[GR_CC0])
68d75312 1620
6f29feb1
JW		 1621/* All references to certain hard regs, except those created
1622 by allocating pseudo regs into them (when that's possible),
1623 go through these unique rtx objects. */
5da077de
AS		 1624#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1625#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1626#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1627#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
68d75312 1628
6f29feb1
JW		 1629extern rtx pic_offset_table_rtx;
1630extern rtx struct_value_rtx;
1631extern rtx struct_value_incoming_rtx;
1632extern rtx static_chain_rtx;
1633extern rtx static_chain_incoming_rtx;
07ebc930 1634extern rtx return_address_pointer_rtx;
3b80f6ca
RH		 1635
1636/* Include the RTL generation functions. */
1637
1638#ifndef NO_GENRTL_H
1639#include "genrtl.h"
1640#endif
1641
41472af8
MM		 1642/* There are some RTL codes that require special attention; the
1643 generation functions included above do the raw handling. If you
b4213325
MM		 1644 add to this list, modify special_rtx in gengenrtl.c as well. You
1645 should also modify gen_rtx to use the special function. */
3b80f6ca 1646
a79e3a45 1647extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode,
0133b7d9 1648 HOST_WIDE_INT, HOST_WIDE_INT));
cdadb1dd 1649extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
08394eef 1650extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
cdadb1dd 1651extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
ddef6bc7 1652extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
cdadb1dd 1653extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
3b80f6ca 1654
ddef6bc7
JJ		 1655extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1656
aefdd5ab
JL		 1657/* We need the cast here to ensure that we get the same result both with
1658 and without prototypes. */
1659#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
3b80f6ca 1660
6f29feb1
JW		 1661/* Virtual registers are used during RTL generation to refer to locations into
1662 the stack frame when the actual location isn't known until RTL generation
1663 is complete. The routine instantiate_virtual_regs replaces these with
1664 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1665 a constant. */
1666
1667#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1668
1669/* This points to the first word of the incoming arguments passed on the stack,
1670 either by the caller or by the callee when pretending it was passed by the
1671 caller. */
1672
5da077de 1673#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
6f29feb1
JW		 1674
1675#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1676
60343c3b 1677/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
6f29feb1
JW		 1678 variable on the stack. Otherwise, it points to the first variable on
1679 the stack. */
1680
5da077de 1681#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
6f29feb1
JW		 1682
1683#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1684
1685/* This points to the location of dynamically-allocated memory on the stack
1686 immediately after the stack pointer has been adjusted by the amount
1687 desired. */
1688
5da077de 1689#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
6f29feb1
JW		 1690
1691#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1692
1693/* This points to the location in the stack at which outgoing arguments should
1694 be written when the stack is pre-pushed (arguments pushed using push
1695 insns always use sp). */
1696
5da077de 1697#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
6f29feb1
JW		 1698
1699#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1700
71038426
RH		 1701/* This points to the Canonical Frame Address of the function. This
1702 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1703 but is calculated relative to the arg pointer for simplicity; the
f590cca1 1704 frame pointer nor stack pointer are necessarily fixed relative to
71038426
RH		 1705 the CFA until after reload. */
1706
5da077de 1707#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
71038426
RH		 1708
1709#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1710
1711#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
6f29feb1 1712
a06ef755
RK		 1713/* Nonzero if REGNUM is a pointer into the stack frame. */
1714#define REGNO_PTR_FRAME_P(REGNUM) \
1715 ((REGNUM) == STACK_POINTER_REGNUM \
1716 || (REGNUM) == FRAME_POINTER_REGNUM \
1717 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1718 || (REGNUM) == ARG_POINTER_REGNUM \
1719 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1720 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1721
848e0190 1722/* REGNUM never really appearing in the INSN stream. */
cf403648 1723#define INVALID_REGNUM (~(unsigned int) 0)
848e0190 1724
cdadb1dd 1725extern rtx find_next_ref PARAMS ((rtx, rtx));
f837a861 1726
2f78c311
ZW		 1727extern rtx output_constant_def PARAMS ((tree, int));
1728extern rtx immed_real_const PARAMS ((tree));
6f29feb1
JW		 1729
1730/* Define a default value for STORE_FLAG_VALUE. */
1731
1732#ifndef STORE_FLAG_VALUE
1733#define STORE_FLAG_VALUE 1
1734#endif
1735
0ea0e871
JL		 1736/* Nonzero after the second flow pass has completed.
1737 Set to 1 or 0 by toplev.c */
1738extern int flow2_completed;
1739
6f29feb1 1740/* Nonzero after end of reload pass.
0ea0e871 1741 Set to 1 or 0 by reload1.c. */
6f29feb1
JW		 1742
1743extern int reload_completed;
1744
1745/* Set to 1 while reload_as_needed is operating.
1746 Required by some machines to handle any generated moves differently. */
1747
1748extern int reload_in_progress;
1749
1750/* If this is nonzero, we do not bother generating VOLATILE
1751 around volatile memory references, and we are willing to
1752 output indirect addresses. If cse is to follow, we reject
1753 indirect addresses so a useful potential cse is generated;
1754 if it is used only once, instruction combination will produce
1755 the same indirect address eventually. */
1756extern int cse_not_expected;
1757
f1db3576
JL		 1758/* Set to nonzero before life analysis to indicate that it is unsafe to
1759 generate any new pseudo registers. */
1760extern int no_new_pseudos;
1761
f5118aa5 1762/* Translates rtx code to tree code, for those codes needed by
88efc60a
RK		 1763 REAL_ARITHMETIC. The function returns an int because the caller may not
1764 know what `enum tree_code' means. */
1765
cdadb1dd 1766extern int rtx_to_tree_code PARAMS ((enum rtx_code));
9ae8ffe7 1767
ac957f13 1768/* In tree.c */
ac957f13 1769struct obstack;
cdadb1dd 1770extern void gcc_obstack_init PARAMS ((struct obstack *));
1f8f4a0b 1771
ac957f13
JL		 1772/* In cse.c */
1773struct cse_basic_block_data;
f1c1dfc3
BS		 1774
1775/* Return the right cost to give to an operation
1776 to make the cost of the corresponding register-to-register instruction
1777 N times that of a fast register-to-register instruction. */
1778#define COSTS_N_INSNS(N) ((N) * 4)
1779
1780/* Maximum cost of a rtl expression. This value has the special meaning
1781 not to use an rtx with this cost under any circumstances. */
1782#define MAX_COST INT_MAX
1783
cdadb1dd 1784extern int rtx_cost PARAMS ((rtx, enum rtx_code));
01329426 1785extern int address_cost PARAMS ((rtx, enum machine_mode));
4793dca1 1786extern void delete_trivially_dead_insns PARAMS ((rtx, int, int));
ac957f13 1787#ifdef BUFSIZ
cdadb1dd 1788extern int cse_main PARAMS ((rtx, int, int, FILE *));
ac957f13 1789#endif
cdadb1dd 1790extern void cse_end_of_basic_block PARAMS ((rtx,
ac957f13
JL		 1791 struct cse_basic_block_data *,
1792 int, int, int));
1793
1794/* In jump.c */
cdadb1dd
KG		 1795extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1796extern int condjump_p PARAMS ((rtx));
e4c85816
JH		 1797extern int any_condjump_p PARAMS ((rtx));
1798extern int any_uncondjump_p PARAMS ((rtx));
1799extern int safe_to_remove_jump_p PARAMS ((rtx));
1800extern rtx pc_set PARAMS ((rtx));
cdadb1dd
KG		 1801extern rtx condjump_label PARAMS ((rtx));
1802extern int simplejump_p PARAMS ((rtx));
1803extern int returnjump_p PARAMS ((rtx));
1804extern int onlyjump_p PARAMS ((rtx));
44ce0063 1805extern int only_sets_cc0_p PARAMS ((rtx));
cdadb1dd 1806extern int sets_cc0_p PARAMS ((rtx));
2ea64f10 1807extern int invert_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1808extern int invert_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1809extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1810extern int true_regnum PARAMS ((rtx));
2ea64f10 1811extern int redirect_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1812extern int redirect_jump PARAMS ((rtx, rtx, int));
cdadb1dd 1813extern void rebuild_jump_labels PARAMS ((rtx));
ab94bc48
JH		 1814extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1815extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1816 rtx, rtx, rtx));
cdadb1dd
KG		 1817extern void delete_for_peephole PARAMS ((rtx, rtx));
1818extern int condjump_in_parallel_p PARAMS ((rtx));
56d44285 1819extern void never_reached_warning PARAMS ((rtx, rtx));
0045d504
JH		 1820extern void purge_line_number_notes PARAMS ((rtx));
1821extern void copy_loop_headers PARAMS ((rtx));
14bf4a33 1822
eebedaa5 1823/* In emit-rtl.c. */
cdadb1dd
KG		 1824extern int max_reg_num PARAMS ((void));
1825extern int max_label_num PARAMS ((void));
1826extern int get_first_label_num PARAMS ((void));
1827extern void delete_insns_since PARAMS ((rtx));
1828extern void mark_reg_pointer PARAMS ((rtx, int));
1829extern void mark_user_reg PARAMS ((rtx));
1830extern void reset_used_flags PARAMS ((rtx));
1831extern void reorder_insns PARAMS ((rtx, rtx, rtx));
3c030e88 1832extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
cdadb1dd
KG		 1833extern int get_max_uid PARAMS ((void));
1834extern int in_sequence_p PARAMS ((void));
1835extern void force_next_line_note PARAMS ((void));
1836extern void clear_emit_caches PARAMS ((void));
1837extern void init_emit PARAMS ((void));
1838extern void init_emit_once PARAMS ((int));
1839extern void push_topmost_sequence PARAMS ((void));
1840extern void pop_topmost_sequence PARAMS ((void));
1841extern int subreg_realpart_p PARAMS ((rtx));
1842extern void reverse_comparison PARAMS ((rtx));
1843extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1844extern void set_new_first_and_last_label_num PARAMS ((int, int));
1845extern void set_new_last_label_num PARAMS ((int));
d1b81779 1846extern void unshare_all_rtl_again PARAMS ((rtx));
cdadb1dd
KG		 1847extern void set_last_insn PARAMS ((rtx));
1848extern void link_cc0_insns PARAMS ((rtx));
1849extern void add_insn PARAMS ((rtx));
1850extern void add_insn_before PARAMS ((rtx, rtx));
1851extern void add_insn_after PARAMS ((rtx, rtx));
1852extern void remove_insn PARAMS ((rtx));
1853extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1854extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1855extern enum rtx_code classify_insn PARAMS ((rtx));
1856extern rtx emit PARAMS ((rtx));
a11759a3
JR		 1857/* Query and clear/ restore no_line_numbers. This is used by the
1858 switch / case handling in stmt.c to give proper line numbers in
1859 warnings about unreachable code. */
cdadb1dd
KG		 1860int force_line_numbers PARAMS ((void));
1861void restore_line_number_status PARAMS ((int old_value));
1862extern void renumber_insns PARAMS ((FILE *));
f8855270 1863extern void remove_unnecessary_notes PARAMS ((void));
53c17031
JH		 1864extern rtx delete_insn PARAMS ((rtx));
1865extern void delete_insn_chain PARAMS ((rtx, rtx));
ac957f13 1866
ac957f13 1867/* In combine.c */
770ae6cc
RK		 1868extern int combine_instructions PARAMS ((rtx, unsigned int));
1869extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1870extern rtx remove_death PARAMS ((unsigned int, rtx));
ac957f13 1871#ifdef BUFSIZ
cdadb1dd
KG		 1872extern void dump_combine_stats PARAMS ((FILE *));
1873extern void dump_combine_total_stats PARAMS ((FILE *));
ac957f13
JL		 1874#endif
1875
eebedaa5 1876/* In sched.c. */
ac957f13 1877#ifdef BUFSIZ
cdadb1dd 1878extern void schedule_insns PARAMS ((FILE *));
18e720b3 1879extern void schedule_ebbs PARAMS ((FILE *));
ac957f13 1880#endif
cdadb1dd 1881extern void fix_sched_param PARAMS ((const char *, const char *));
ac957f13
JL		 1882
1883/* In print-rtl.c */
47c10e9b 1884extern const char *print_rtx_head;
cdadb1dd
KG		 1885extern void debug_rtx PARAMS ((rtx));
1886extern void debug_rtx_list PARAMS ((rtx, int));
4c85a96d 1887extern void debug_rtx_range PARAMS ((rtx, rtx));
cdadb1dd 1888extern rtx debug_rtx_find PARAMS ((rtx, int));
ac957f13 1889#ifdef BUFSIZ
998d7deb 1890extern void print_mem_expr PARAMS ((FILE *, tree));
cdadb1dd 1891extern void print_rtl PARAMS ((FILE *, rtx));
75b7557d 1892extern void print_simple_rtl PARAMS ((FILE *, rtx));
cdadb1dd
KG		 1893extern int print_rtl_single PARAMS ((FILE *, rtx));
1894extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
ac957f13
JL		 1895#endif
1896
1897/* In loop.c */
cdadb1dd
KG		 1898extern void init_loop PARAMS ((void));
1899extern rtx libcall_other_reg PARAMS ((rtx, rtx));
ac957f13 1900#ifdef BUFSIZ
1bf14ad7 1901extern void loop_optimize PARAMS ((rtx, FILE *, int));
ac957f13 1902#endif
cdadb1dd 1903extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
ac957f13
JL		 1904
1905/* In function.c */
cdadb1dd
KG		 1906extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1907extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1908extern int prologue_epilogue_contains PARAMS ((rtx));
0a1c58a2 1909extern int sibcall_epilogue_contains PARAMS ((rtx));
591ccf92 1910extern void preserve_rtl_expr_result PARAMS ((rtx));
cdadb1dd
KG		 1911extern void mark_temp_addr_taken PARAMS ((rtx));
1912extern void update_temp_slot_address PARAMS ((rtx, rtx));
cdadb1dd 1913extern void purge_addressof PARAMS ((rtx));
659e47fb 1914extern void purge_hard_subreg_sets PARAMS ((rtx));
ac957f13 1915
ac957f13 1916/* In stmt.c */
47ee9bcb 1917extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
cdadb1dd
KG		 1918extern void expand_null_return PARAMS ((void));
1919extern void emit_jump PARAMS ((rtx));
1920extern int preserve_subexpressions_p PARAMS ((void));
ac957f13
JL		 1921
1922/* In expr.c */
3bdf5ad1
RK		 1923extern void move_by_pieces PARAMS ((rtx, rtx,
1924 unsigned HOST_WIDE_INT,
1925 unsigned int));
2e245dac 1926
ac957f13 1927/* In flow.c */
0626ef8a
AM		 1928extern void recompute_reg_usage PARAMS ((rtx, int));
1929extern int initialize_uninitialized_subregs PARAMS ((void));
ac957f13 1930#ifdef BUFSIZ
0626ef8a
AM		 1931extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1932extern void dump_flow_info PARAMS ((FILE *));
ac957f13
JL		 1933#endif
1934
1935/* In expmed.c */
cdadb1dd
KG		 1936extern void init_expmed PARAMS ((void));
1937extern void expand_inc PARAMS ((rtx, rtx));
1938extern void expand_dec PARAMS ((rtx, rtx));
1939extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
ac957f13
JL		 1940 unsigned HOST_WIDE_INT, rtx,
1941 int, int));
1942
50b2596f
KG		 1943/* In gcse.c */
1944#ifdef BUFSIZ
cdadb1dd 1945extern int gcse_main PARAMS ((rtx, FILE *));
50b2596f
KG		 1946#endif
1947
ac957f13 1948/* In global.c */
cdadb1dd 1949extern void mark_elimination PARAMS ((int, int));
ac957f13 1950#ifdef BUFSIZ
cdadb1dd
KG		 1951extern int global_alloc PARAMS ((FILE *));
1952extern void dump_global_regs PARAMS ((FILE *));
ac957f13 1953#endif
cab634f2 1954#ifdef HARD_CONST
cdadb1dd 1955extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
cab634f2 1956#endif
d29c259b 1957extern void build_insn_chain PARAMS ((rtx));
ac957f13
JL		 1958
1959/* In regclass.c */
cdadb1dd
KG		 1960extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1961extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1962extern void globalize_reg PARAMS ((int));
1963extern void init_regs PARAMS ((void));
1964extern void init_reg_sets PARAMS ((void));
1965extern void regset_release_memory PARAMS ((void));
1966extern void regclass_init PARAMS ((void));
1967extern void regclass PARAMS ((rtx, int, FILE *));
770ae6cc
RK		 1968extern void reg_scan PARAMS ((rtx, unsigned int, int));
1969extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
cdadb1dd
KG		 1970extern void fix_register PARAMS ((const char *, int, int));
1971
1972extern void delete_null_pointer_checks PARAMS ((rtx));
a157febd 1973
50b2596f
KG		 1974/* In regmove.c */
1975#ifdef BUFSIZ
cdadb1dd 1976extern void regmove_optimize PARAMS ((rtx, int, FILE *));
50b2596f 1977#endif
1e7f0a48 1978extern void combine_stack_adjustments PARAMS ((void));
50b2596f
KG		 1979
1980/* In reorg.c */
1981#ifdef BUFSIZ
cdadb1dd 1982extern void dbr_schedule PARAMS ((rtx, FILE *));
50b2596f
KG		 1983#endif
1984
ac957f13
JL		 1985/* In local-alloc.c */
1986#ifdef BUFSIZ
cdadb1dd 1987extern void dump_local_alloc PARAMS ((FILE *));
ac957f13 1988#endif
cdadb1dd
KG		 1989extern int local_alloc PARAMS ((void));
1990extern int function_invariant_p PARAMS ((rtx));
ac957f13 1991
ac957f13 1992/* In profile.c */
cdadb1dd 1993extern void init_branch_prob PARAMS ((const char *));
51891abe
JH		 1994extern void branch_prob PARAMS ((void));
1995extern void end_branch_prob PARAMS ((void));
cdadb1dd 1996extern void output_func_start_profiler PARAMS ((void));
ac957f13
JL		 1997
1998/* In reg-stack.c */
1999#ifdef BUFSIZ
cdadb1dd 2000extern void reg_to_stack PARAMS ((rtx, FILE *));
ac957f13 2001#endif
ac957f13
JL		 2002
2003/* In fold-const.c */
05bccae2
RK		 2004extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2005 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2006 unsigned HOST_WIDE_INT *,
2007 HOST_WIDE_INT *));
2008extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2009 unsigned HOST_WIDE_INT *,
2010 HOST_WIDE_INT *));
2011extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
2012 HOST_WIDE_INT,
2013 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2014 unsigned HOST_WIDE_INT *,
2015 HOST_WIDE_INT *));
2016extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2017 HOST_WIDE_INT, unsigned int,
2018 unsigned HOST_WIDE_INT *,
2019 HOST_WIDE_INT *, int));
2020extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2021 HOST_WIDE_INT, unsigned int,
2022 unsigned HOST_WIDE_INT *,
2023 HOST_WIDE_INT *, int));
2024extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2025 HOST_WIDE_INT, unsigned int,
2026 unsigned HOST_WIDE_INT *,
2027 HOST_WIDE_INT *));
2028extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
2029 HOST_WIDE_INT, unsigned int,
2030 unsigned HOST_WIDE_INT *,
2031 HOST_WIDE_INT *));
ac957f13
JL		 2032
2033/* In calls.c */
ebb1b59a
BS		 2034enum libcall_type
2035{
2036 LCT_NORMAL = 0,
2037 LCT_CONST = 1,
2038 LCT_PURE = 2,
2039 LCT_CONST_MAKE_BLOCK = 3,
695ee791 2040 LCT_PURE_MAKE_BLOCK = 4,
9555a122 2041 LCT_NORETURN = 5,
9d98f8f9 2042 LCT_THROW = 6,
9defc9b7
RH		 2043 LCT_ALWAYS_RETURN = 7,
2044 LCT_RETURNS_TWICE = 8
ebb1b59a
BS		 2045};
2046
2047extern void emit_library_call PARAMS ((rtx, enum libcall_type,
2048 enum machine_mode, int,
2049 ...));
2050extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
2051 enum machine_mode, int,
2052 ...));
ac957f13
JL		 2053
2054/* In unroll.c */
cdadb1dd 2055extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
ac957f13
JL		 2056
2057/* In varasm.c */
cdadb1dd 2058extern int in_data_section PARAMS ((void));
cdadb1dd 2059extern void init_varasm_once PARAMS ((void));
ac957f13
JL		 2060
2061/* In rtl.c */
cdadb1dd 2062extern void init_rtl PARAMS ((void));
c25c12b8
R		 2063extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
2064 void *));
2065struct md_constant { char *name, *value; };
ac957f13 2066
bcdaba58 2067#ifdef BUFSIZ
cdadb1dd
KG		 2068extern int read_skip_spaces PARAMS ((FILE *));
2069extern rtx read_rtx PARAMS ((FILE *));
bcdaba58
RH		 2070#endif
2071
2072extern const char *read_rtx_filename;
2073extern int read_rtx_lineno;
2074
987009bf
ZW		 2075/* Redefine abort to report an internal error w/o coredump, and
2076 reporting the location of the error in the source file. This logic
2077 is duplicated in rtl.h and tree.h because every file that needs the
2078 special abort includes one or both. toplev.h gets too few files,
2079 system.h gets too many. */
2080
cdadb1dd 2081extern void fancy_abort PARAMS ((const char *, int, const char *))
987009bf 2082 ATTRIBUTE_NORETURN;
fbfc1192 2083#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
987009bf 2084
ac957f13 2085/* In alias.c */
43fe47ca 2086extern void clear_reg_alias_info PARAMS ((rtx));
db048faf 2087extern rtx canon_rtx PARAMS ((rtx));
cdadb1dd 2088extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
e38fe8e0 2089 int (*)(rtx, int)));
a13d4ebf
AM		 2090extern rtx get_addr PARAMS ((rtx));
2091extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2092 rtx, int (*)(rtx, int)));
cdadb1dd
KG		 2093extern int read_dependence PARAMS ((rtx, rtx));
2094extern int anti_dependence PARAMS ((rtx, rtx));
2095extern int output_dependence PARAMS ((rtx, rtx));
2096extern void mark_constant_function PARAMS ((void));
2097extern void init_alias_once PARAMS ((void));
2098extern void init_alias_analysis PARAMS ((void));
2099extern void end_alias_analysis PARAMS ((void));
cdadb1dd 2100extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
4c649323 2101
0a1c58a2
JL		 2102/* In sibcall.c */
2103typedef enum {
2104 sibcall_use_normal = 1,
2105 sibcall_use_tail_recursion,
2106 sibcall_use_sibcall
2107} sibcall_use_t;
2108
2109extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2110extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2111
21b2cd73 2112#ifdef STACK_REGS
cdadb1dd 2113extern int stack_regs_mentioned PARAMS ((rtx insn));
21b2cd73
JH		 2114#endif
2115
a157febd 2116/* In toplev.c */
a157febd 2117extern rtx stack_limit_rtx;
dfdb644f 2118
7b82b5da 2119/* In regrename.c */
7b82b5da 2120extern void regrename_optimize PARAMS ((void));
8582c27b 2121extern void copyprop_hardreg_forward PARAMS ((void));
7b82b5da 2122
4db384c9 2123/* In ifcvt.c */
2ea64f10
RH		 2124extern void if_convert PARAMS ((int));
2125
4db384c9
JH		 2126/* In predict.c */
2127extern void invert_br_probabilities PARAMS ((rtx));
6ab16dd9 2128extern bool expensive_function_p PARAMS ((int));
88657302 2129#endif /* ! GCC_RTL_H */
GNU Compiler Collection
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