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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,
90a74703 3 1999, 2000, 2001 Free Software Foundation, Inc.
6f29feb1
JW		 4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING. If not, write to
e99215a3
RK		 19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, 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
88efc60a
RK		 34#ifndef TREE_CODE
35union tree_node;
36#endif
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
JW		 50
51#define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
aa0b4465 54extern const int rtx_length[];
0f41302f 55#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
6f29feb1 56
5f06c983 57extern const char * const rtx_name[];
0f41302f 58#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
6f29feb1 59
aa0b4465 60extern const char * const rtx_format[];
0f41302f 61#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
6f29feb1 62
1f9a015e 63extern const char rtx_class[];
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. */
74 unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
75 unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
76 unsigned min_after_base: 1; /* minimum address target label is after BASE. */
77 unsigned max_after_base: 1; /* maximum address target label is after BASE. */
78 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
79 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
80 unsigned : 2;
81 unsigned scale : 8;
82} addr_diff_vec_flags;
83
6f29feb1
JW		 84/* Common union for an element of an rtx. */
85
86typedef union rtunion_def
87{
5f4f0e22 88 HOST_WIDE_INT rtwint;
6f29feb1 89 int rtint;
770ae6cc 90 unsigned int rtuint;
3cce094d 91 const char *rtstr;
6f29feb1
JW		 92 struct rtx_def *rtx;
93 struct rtvec_def *rtvec;
94 enum machine_mode rttype;
33f7f353 95 addr_diff_vec_flags rt_addr_diff_vec_flags;
eab5c70a 96 struct cselib_val_struct *rt_cselib;
0dfa1860
MM		 97 struct bitmap_head_def *rtbit;
98 union tree_node *rttree;
e881bb1b 99 struct basic_block_def *bb;
6f29feb1
JW		 100} rtunion;
101
102/* RTL expression ("rtx"). */
103
104typedef struct rtx_def
105{
6f29feb1 106 /* The kind of expression this is. */
c149cc37 107 ENUM_BITFIELD(rtx_code) code: 16;
18def38f 108
6f29feb1 109 /* The kind of value the expression has. */
c149cc37
RL		 110 ENUM_BITFIELD(machine_mode) mode : 8;
111
0a1c58a2
JL		 112 /* 1 in an INSN if it can alter flow of control
113 within this function.
114 LINK_COST_ZERO in an INSN_LIST. */
6f29feb1 115 unsigned int jump : 1;
0a1c58a2
JL		 116 /* 1 in an INSN if it can call another function.
117 LINK_COST_FREE in an INSN_LIST. */
6f29feb1 118 unsigned int call : 1;
49982682
JW		 119 /* 1 in a REG if value of this expression will never change during
120 the current function, even though it is not manifestly constant.
121 1 in a MEM if contents of memory are constant. This does not
122 necessarily mean that the value of this expression is constant.
07be3989 123 1 in a SUBREG if it is from a promoted variable that is unsigned.
6f29feb1
JW		 124 1 in a SYMBOL_REF if it addresses something in the per-function
125 constants pool.
126 1 in a CALL_INSN if it is a const call.
127 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
128 reorg until end of compilation; cleared before used. */
129 unsigned int unchanging : 1;
130 /* 1 in a MEM expression if contents of memory are volatile.
131 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
132 if it is deleted.
133 1 in a REG expression if corresponds to a variable declared by the user.
134 0 for an internally generated temporary.
2a406d2a
RS		 135 In a SYMBOL_REF, this flag is used for machine-specific purposes.
136 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
6f29feb1 137 unsigned int volatil : 1;
8358a974 138 /* 1 in a MEM referring to a field of an aggregate.
6f29feb1
JW		 139 0 if the MEM was a variable or the result of a * operator in C;
140 1 if it was the result of a . or -> operator (on a struct) in C.
141 1 in a REG if the register is used only in exit code a loop.
f590cca1 142 1 in a SUBREG expression if was generated from a variable with a
07be3989 143 promoted mode.
6f29feb1
JW		 144 1 in a CODE_LABEL if the label is used for nonlocal gotos
145 and must not be deleted even if its count is zero.
146 1 in a LABEL_REF if this is a reference to a label outside the
147 current loop.
148 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
d45cf215 149 together with the preceding insn. Valid only within sched.
6f29feb1
JW		 150 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
151 from the target of a branch. Valid from reorg until end of compilation;
b53978a3
JO		 152 cleared before used.
153 1 in an INSN if this insn is dead code. Valid only during
154 dead-code elimination phase; cleared before use. */
6f29feb1
JW		 155 unsigned int in_struct : 1;
156 /* 1 if this rtx is used. This is used for copying shared structure.
157 See `unshare_all_rtl'.
f590cca1 158 In a REG, this is not needed for that purpose, and used instead
6f29feb1
JW		 159 in `leaf_renumber_regs_insn'.
160 In a SYMBOL_REF, means that emit_library_call
161 has used it as the function. */
162 unsigned int used : 1;
163 /* Nonzero if this rtx came from procedure integration.
164 In a REG, nonzero means this reg refers to the return value
ff0b6b99
FS		 165 of the current function.
166 1 in a SYMBOL_REF if the symbol is weak. */
6f29feb1 167 unsigned integrated : 1;
b664de3a 168 /* 1 in an INSN or a SET if this rtx is related to the call frame,
c6df88cb 169 either changing how we compute the frame address or saving and
f590cca1 170 restoring registers in the prologue and epilogue.
c6df88cb 171 1 in a MEM if the MEM refers to a scalar, rather than a member of
bd7cf17e 172 an aggregate.
3502dc9c 173 1 in a REG if the register is a pointer.
bd7cf17e
JJ		 174 1 in a SYMBOL_REF if it addresses something in the per-function
175 constant string pool. */
469ac993 176 unsigned frame_related : 1;
0a25f1f5 177
6f29feb1
JW		 178 /* The first element of the operands of this rtx.
179 The number of operands and their types are controlled
180 by the `code' field, according to rtl.def. */
181 rtunion fld[1];
182} *rtx;
183
184#define NULL_RTX (rtx) 0
185
186/* Define macros to access the `code' field of the rtx. */
187
dbbbbf3b
JDA		 188#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
189#define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
6f29feb1 190
dbbbbf3b
JDA		 191#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
192#define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
6f29feb1
JW		 193
194#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
195#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
469ac993 196#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
6f29feb1
JW		 197
198/* RTL vector. These appear inside RTX's when there is a need
199 for a variable number of things. The principle use is inside
200 PARALLEL expressions. */
201
202typedef struct rtvec_def{
e9a25f70 203 int num_elem; /* number of elements */
8f985ec4 204 struct rtx_def *elem[1];
6f29feb1
JW		 205} *rtvec;
206
207#define NULL_RTVEC (rtvec) 0
208
209#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
e9a25f70 210#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
6f29feb1 211
b53978a3 212/* Predicate yielding nonzero iff X is an rtl for a register. */
6f29feb1
JW		 213#define REG_P(X) (GET_CODE (X) == REG)
214
b53978a3
JO		 215/* Predicate yielding nonzero iff X is a label insn. */
216#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
217
218/* Predicate yielding nonzero iff X is a jump insn. */
219#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
220
221/* Predicate yielding nonzero iff X is a note insn. */
222#define NOTE_P(X) (GET_CODE (X) == NOTE)
223
224/* Predicate yielding nonzero iff X is a barrier insn. */
225#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
226
227/* Predicate yielding nonzero iff X is a data for a jump table. */
228#define JUMP_TABLE_DATA_P(INSN) \
229 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
230 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
231
6f29feb1
JW		 232/* 1 if X is a constant value that is an integer. */
233
234#define CONSTANT_P(X) \
235 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
236 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
ee5332b8
RH		 237 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
238 || GET_CODE (X) == CONSTANT_P_RTX)
6f29feb1
JW		 239
240/* General accessor macros for accessing the fields of an rtx. */
241
f4524c9e 242#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
ef178af3
ZW		 243/* The bit with a star outside the statement expr and an & inside is
244 so that N can be evaluated only once. */
8784fdcd 245#define RTL_CHECK1(RTX, N, C1) __extension__ \
83ab3839 246(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 247 enum rtx_code _code = GET_CODE (_rtx); \
248 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
fbfc1192 249 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
ef178af3 250 if (GET_RTX_FORMAT(_code)[_n] != C1) \
fbfc1192 251 rtl_check_failed_type1(_rtx, _n, C1, __FILE__, __LINE__, __FUNCTION__); \
ef178af3
ZW		 252 &_rtx->fld[_n]; }))
253
8784fdcd 254#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
83ab3839 255(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 256 enum rtx_code _code = GET_CODE (_rtx); \
257 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
fbfc1192 258 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
ef178af3
ZW		 259 if (GET_RTX_FORMAT(_code)[_n] != C1 \
260 && GET_RTX_FORMAT(_code)[_n] != C2) \
261 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
fbfc1192 262 __FUNCTION__); \
ef178af3
ZW		 263 &_rtx->fld[_n]; }))
264
8784fdcd 265#define RTL_CHECKC1(RTX, N, C) __extension__ \
83ab3839
RH		 266(*({ rtx _rtx = (RTX); int _n = (N); \
267 if (GET_CODE (_rtx) != C) \
fbfc1192 268 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, __FUNCTION__); \
83ab3839
RH		 269 &_rtx->fld[_n]; }))
270
8784fdcd 271#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
83ab3839
RH		 272(*({ rtx _rtx = (RTX); int _n = (N); \
273 enum rtx_code _code = GET_CODE (_rtx); \
274 if (_code != C1 && _code != C2) \
fbfc1192 275 rtl_check_failed_code2(_rtx, C1, C2, __FILE__, __LINE__, __FUNCTION__); \
83ab3839
RH		 276 &_rtx->fld[_n]; }))
277
8784fdcd 278#define RTVEC_ELT(RTVEC, I) __extension__ \
83ab3839 279(*({ rtvec _rtvec = (RTVEC); int _i = (I); \
ef178af3
ZW		 280 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
281 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
fbfc1192 282 __FUNCTION__); \
ef178af3
ZW		 283 &_rtvec->elem[_i]; }))
284
cdadb1dd 285extern void rtl_check_failed_bounds PARAMS ((rtx, int,
ef178af3
ZW		 286 const char *, int, const char *))
287 ATTRIBUTE_NORETURN;
cdadb1dd 288extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
ef178af3
ZW		 289 const char *, int, const char *))
290 ATTRIBUTE_NORETURN;
cdadb1dd 291extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
ef178af3
ZW		 292 const char *, int, const char *))
293 ATTRIBUTE_NORETURN;
cdadb1dd 294extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
83ab3839
RH		 295 const char *, int, const char *))
296 ATTRIBUTE_NORETURN;
cdadb1dd 297extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
83ab3839
RH		 298 const char *, int, const char *))
299 ATTRIBUTE_NORETURN;
cdadb1dd 300extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
ef178af3
ZW		 301 const char *, int, const char *))
302 ATTRIBUTE_NORETURN;
303
f4524c9e 304#else /* not ENABLE_RTL_CHECKING */
ef178af3 305
83ab3839
RH		 306#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
307#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
308#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
818a3b15 309#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
83ab3839 310#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
ef178af3
ZW		 311
312#endif
313
314#define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
315#define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
316#define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
317#define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
318#define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
319#define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
320#define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
321#define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
322#define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
323
324#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
325#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
326
327/* These are like XWINT, etc. except that they expect a '0' field instead
328 of the normal type code. */
329
330#define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
331#define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
08394eef 332#define X0UINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtuint)
ef178af3
ZW		 333#define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
334#define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
335#define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
336#define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
337#define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
338#define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
339#define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
340#define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
eab5c70a 341#define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
0dfa1860 342
83ab3839
RH		 343#define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
344#define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
770ae6cc 345#define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
83ab3839
RH		 346#define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
347#define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
348#define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
349#define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
350#define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
351#define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
352#define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
353#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
eab5c70a 354#define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
83ab3839
RH		 355
356#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
357#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
358
359#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
6f29feb1
JW		 360\f
361/* ACCESS MACROS for particular fields of insns. */
362
4e872036
AS		 363/* Determines whether X is an insn. */
364#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
365
6f29feb1
JW		 366/* Holds a unique number for each insn.
367 These are not necessarily sequentially increasing. */
8f985ec4 368#define INSN_UID(INSN) XINT(INSN, 0)
6f29feb1
JW		 369
370/* Chain insns together in sequence. */
8f985ec4
ZW		 371#define PREV_INSN(INSN) XEXP(INSN, 1)
372#define NEXT_INSN(INSN) XEXP(INSN, 2)
6f29feb1
JW		 373
374/* The body of an insn. */
8f985ec4 375#define PATTERN(INSN) XEXP(INSN, 3)
6f29feb1
JW		 376
377/* Code number of instruction, from when it was recognized.
378 -1 means this instruction has not been recognized yet. */
8f985ec4 379#define INSN_CODE(INSN) XINT(INSN, 4)
6f29feb1
JW		 380
381/* Set up in flow.c; empty before then.
382 Holds a chain of INSN_LIST rtx's whose first operands point at
383 previous insns with direct data-flow connections to this one.
384 That means that those insns set variables whose next use is in this insn.
385 They are always in the same basic block as this insn. */
8f985ec4 386#define LOG_LINKS(INSN) XEXP(INSN, 5)
6f29feb1
JW		 387
388/* 1 if insn has been deleted. */
389#define INSN_DELETED_P(INSN) ((INSN)->volatil)
390
391/* 1 if insn is a call to a const function. */
392#define CONST_CALL_P(INSN) ((INSN)->unchanging)
393
0a1c58a2
JL		 394/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
395#define SIBLING_CALL_P(INSN) ((INSN)->jump)
396
6f29feb1
JW		 397/* 1 if insn is a branch that should not unconditionally execute its
398 delay slots, i.e., it is an annulled branch. */
399#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
400
b53978a3
JO		 401/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
402#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
403
6f29feb1 404/* 1 if insn is in a delay slot and is from the target of the branch. If
6dc42e49 405 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
6f29feb1
JW		 406 executed if the branch is taken. For annulled branches with this bit
407 clear, the insn should be executed only if the branch is not taken. */
408#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
409
f590cca1
RH		 410#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
411
412#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
413
6f29feb1 414/* Holds a list of notes on what this insn does to various REGs.
f590cca1
RH		 415 It is a chain of EXPR_LIST rtx's, where the second operand is the
416 chain pointer and the first operand is the REG being described.
6f29feb1 417 The mode field of the EXPR_LIST contains not a real machine mode
f590cca1 418 but a value from enum reg_note. */
6f29feb1 419
8f985ec4 420#define REG_NOTES(INSN) XEXP(INSN, 6)
6f29feb1
JW		 421
422/* Don't forget to change reg_note_name in rtl.c. */
f590cca1
RH		 423enum reg_note
424{
425 /* The value in REG dies in this insn (i.e., it is not needed past
426 this insn). If REG is set in this insn, the REG_DEAD note may,
427 but need not, be omitted. */
428 REG_DEAD = 1,
429
430 /* The REG is autoincremented or autodecremented. */
431 REG_INC,
432
433 /* Describes the insn as a whole; it says that the insn sets a register
434 to a constant value or to be equivalent to a memory address. If the
435 register is spilled to the stack then the constant value should be
436 substituted for it. The contents of the REG_EQUIV is the constant
437 value or memory address, which may be different from the source of
438 the SET although it has the same value. A REG_EQUIV note may also
439 appear on an insn which copies a register parameter to a pseudo-register,
440 if there is a memory address which could be used to hold that
441 pseudo-register throughout the function. */
be1bb652 442 REG_EQUIV,
f590cca1
RH		 443
444 /* Like REG_EQUIV except that the destination is only momentarily equal
445 to the specified rtx. Therefore, it cannot be used for substitution;
446 but it can be used for cse. */
447 REG_EQUAL,
448
449 /* The register set in this insn held 0 before the insn. The contents of
450 the note is the insn that stored the 0. If that insn is deleted or
451 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
452 is actually an INSN_LIST, not an EXPR_LIST. */
453 REG_WAS_0,
454
455 /* This insn copies the return-value of a library call out of the hard reg
456 for return values. This note is actually an INSN_LIST and it points to
457 the first insn involved in setting up arguments for the call. flow.c
458 uses this to delete the entire library call when its result is dead. */
459 REG_RETVAL,
460
461 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
be1bb652
RH		 462 and points at the one that has the REG_RETVAL. This note is also an
463 INSN_LIST. */
f590cca1
RH		 464 REG_LIBCALL,
465
466 /* The register is always nonnegative during the containing loop. This is
467 used in branches so that decrement and branch instructions terminating
468 on zero can be matched. There must be an insn pattern in the md file
469 named `decrement_and_branch_until_zero' or else this will never be added
470 to any instructions. */
471 REG_NONNEG,
472
473 /* There is no conflict *after this insn* between the register in the note
474 and the destination of this insn. */
475 REG_NO_CONFLICT,
476
477 /* Identifies a register set in this insn and never used. */
478 REG_UNUSED,
479
480 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
481 respectively. Normally, these are required to be consecutive insns, but
482 we permit putting a cc0-setting insn in the delay slot of a branch as
483 long as only one copy of the insn exists. In that case, these notes
484 point from one to the other to allow code generation to determine what
be1bb652
RH		 485 any require information and to properly update CC_STATUS. These notes
486 are INSN_LISTs. */
f590cca1
RH		 487 REG_CC_SETTER, REG_CC_USER,
488
489 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
be1bb652
RH		 490 CODE_LABEL contained in the REG_LABEL note is used by the insn.
491 This note is an INSN_LIST. */
f590cca1
RH		 492 REG_LABEL,
493
494 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
495 write-after-read and write-after-write dependencies respectively.
496 Data dependencies, which are the only type of LOG_LINK created by
497 flow, are represented by a 0 reg note kind. */
498 REG_DEP_ANTI, REG_DEP_OUTPUT,
499
4db384c9
JH		 500 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
501 It has an integer value. For jumps, it is the probability that this is a
502 taken branch. For calls, it is the probability that this call won't
503 return. */
f590cca1
RH		 504 REG_BR_PROB,
505
506 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
507 the first insn after each CALL_INSN. It indicates how many times this
508 block was executed. */
509 REG_EXEC_COUNT,
510
511 /* Attached to a call insn; indicates that the call is malloc-like and
512 that the pointer returned cannot alias anything else. */
513 REG_NOALIAS,
514
515 /* Used to optimize rtl generated by dynamic stack allocations for targets
516 where SETJMP_VIA_SAVE_AREA is true. */
517 REG_SAVE_AREA,
518
4db384c9
JH		 519 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
520 CONCAT of two integer value. First specifies the branch predictor
521 that added the note, second specifies the predicted hitrate of branch
522 in the same format as REG_BR_PROB note uses. */
f590cca1
RH		 523 REG_BR_PRED,
524
525 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
526 for DWARF to interpret what they imply. The attached rtx is used
527 instead of intuition. */
528 REG_FRAME_RELATED_EXPR,
529
530 /* Indicates that REG holds the exception context for the function.
531 This context is shared by inline functions, so the code to acquire
532 the real exception context is delayed until after inlining. */
533 REG_EH_CONTEXT,
534
535 /* Indicates what exception region an INSN belongs in. This is used to
536 indicate what region to which a call may throw. REGION 0 indicates
537 that a call cannot throw at all. REGION -1 indicates that it cannot
538 throw, nor will it execute a non-local goto. */
539 REG_EH_REGION,
540
541 /* Indicates that a call is actually a call to rethrow, and specifies the
542 rethrow symbol for the region the rethrow is targetting. This provides
543 a way to generate the non standard flow edges required for a rethrow. */
544 REG_EH_RETHROW,
545
546 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
8cd8f856
GK		 547 REG_SAVE_NOTE,
548
549 /* Indicates that this insn (which is part of the prologue) computes
550 a value which might not be used later, and if so it's OK to delete
551 the insn. Normally, deleting any insn in the prologue is an error.
552 At present the parameter is unused and set to (const_int 0). */
ca3920ad
JW		 553 REG_MAYBE_DEAD,
554
555 /* Indicates that a call does not return. */
4b01bd16
RH		 556 REG_NORETURN,
557
558 /* Indicates that an indirect jump is a non-local goto instead of a
559 computed goto. */
560 REG_NON_LOCAL_GOTO
f590cca1
RH		 561};
562
7ae21caf
DE		 563/* The base value for branch probability notes. */
564#define REG_BR_PROB_BASE 10000
6f29feb1
JW		 565
566/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
567#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
568#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
569
570/* Names for REG_NOTE's in EXPR_LIST insn's. */
571
1f9a015e 572extern const char * const reg_note_name[];
0f41302f 573#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
6f29feb1 574
e51c6661
RK		 575/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
576 USE and CLOBBER expressions.
577 USE expressions list the registers filled with arguments that
578 are passed to the function.
579 CLOBBER expressions document the registers explicitly clobbered
580 by this CALL_INSN.
581 Pseudo registers can not be mentioned in this list. */
8f985ec4 582#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
e51c6661 583
6f29feb1
JW		 584/* The label-number of a code-label. The assembler label
585 is made from `L' and the label-number printed in decimal.
586 Label numbers are unique in a compilation. */
be1bb652 587#define CODE_LABEL_NUMBER(INSN) XINT(INSN, 5)
6f29feb1
JW		 588
589#define LINE_NUMBER NOTE
590
0dfa1860
MM		 591/* In a NOTE that is a line number, this is a string for the file name that the
592 line is in. We use the same field to record block numbers temporarily in
593 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
594 between ints and pointers if we use a different macro for the block number.)
595 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
596 information as a rtx in the field. */
6f29feb1 597
83ab3839 598#define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
1a4450c7 599#define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
83ab3839
RH		 600#define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
601#define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
602#define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
603#define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
994a57cd 604#define NOTE_EXPECTED_VALUE(INSN) XCEXP(INSN, 3, NOTE)
0dfa1860 605
6f29feb1
JW		 606/* In a NOTE that is a line number, this is the line number.
607 Other kinds of NOTEs are identified by negative numbers here. */
83ab3839 608#define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
6f29feb1 609
589ca5cb
MM		 610/* Nonzero if INSN is a note marking the beginning of a basic block. */
611#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
612 (GET_CODE (INSN) == NOTE \
613 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
614
6f29feb1 615/* Codes that appear in the NOTE_LINE_NUMBER field
a31efb86 616 for kinds of notes that are not line numbers.
6f29feb1 617
a31efb86
DE		 618 Notice that we do not try to use zero here for any of
619 the special note codes because sometimes the source line
620 actually can be zero! This happens (for example) when we
621 are generating code for the per-translation-unit constructor
622 and destructor routines for some C++ translation unit.
623
624 If you should change any of the following values, or if you
625 should add a new value here, don't forget to change the
626 note_insn_name array in rtl.c. */
6f29feb1 627
d636c18c
RH		 628enum insn_note
629{
630 /* Keep all of these numbers negative. Adjust as needed. */
631 NOTE_INSN_BIAS = -100,
632
633 /* This note is used to get rid of an insn
634 when it isn't safe to patch the insn out of the chain. */
635 NOTE_INSN_DELETED,
636
637 /* These are used to mark the beginning and end of a lexical block.
638 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
639 NOTE_INSN_BLOCK_BEG,
640 NOTE_INSN_BLOCK_END,
641
642 /* These mark the extremes of a loop. */
643 NOTE_INSN_LOOP_BEG,
644 NOTE_INSN_LOOP_END,
645
646 /* Generated at the place in a loop that `continue' jumps to. */
647 NOTE_INSN_LOOP_CONT,
648 /* Generated at the start of a duplicated exit test. */
649 NOTE_INSN_LOOP_VTOP,
650
651 /* This kind of note is generated at the end of the function body,
652 just before the return insn or return label. In an optimizing
653 compilation it is deleted by the first jump optimization, after
654 enabling that optimizer to determine whether control can fall
655 off the end of the function body without a return statement. */
656 NOTE_INSN_FUNCTION_END,
657
658 /* This kind of note is generated just after each call to `setjmp',
659 and similar functions that can return twice. */
660 NOTE_INSN_SETJMP,
661
662 /* This marks the point immediately after the last prologue insn. */
663 NOTE_INSN_PROLOGUE_END,
664
665 /* This marks the point immediately prior to the first epilogue insn. */
666 NOTE_INSN_EPILOGUE_BEG,
667
668 /* Generated in place of user-declared labels when they are deleted. */
669 NOTE_INSN_DELETED_LABEL,
670
671 /* This note indicates the start of the real body of the function,
672 i.e. the point just after all of the parms have been moved into
673 their homes, etc. */
674 NOTE_INSN_FUNCTION_BEG,
675
676 /* These note where exception handling regions begin and end.
677 Uses NOTE_EH_HANDLER to identify the region in question. */
678 NOTE_INSN_EH_REGION_BEG,
679 NOTE_INSN_EH_REGION_END,
680
681 /* Generated whenever a duplicate line number note is output. For example,
682 one is output after the end of an inline function, in order to prevent
683 the line containing the inline call from being counted twice in gcov. */
b3b42a4d 684 NOTE_INSN_REPEATED_LINE_NUMBER,
d636c18c
RH		 685
686 /* Start/end of a live range region, where pseudos allocated on the stack
687 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
b3b42a4d 688 NOTE_INSN_RANGE_BEG,
d636c18c
RH		 689 NOTE_INSN_RANGE_END,
690
691 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
692 NOTE_INSN_LIVE,
693
694 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
695 NOTE_INSN_BASIC_BLOCK,
696
994a57cd
RH		 697 /* Record the expected value of a register at a location. Uses
698 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
699 NOTE_INSN_EXPECTED_VALUE,
700
d636c18c
RH		 701 NOTE_INSN_MAX
702};
10f07067 703
6f29feb1
JW		 704/* Names for NOTE insn's other than line numbers. */
705
d636c18c
RH		 706extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
707#define GET_NOTE_INSN_NAME(NOTE_CODE) \
dbbbbf3b 708 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
6f29feb1
JW		 709
710/* The name of a label, in case it corresponds to an explicit label
711 in the input source code. */
be1bb652 712#define LABEL_NAME(RTX) XCSTR(RTX, 6, CODE_LABEL)
6f29feb1
JW		 713
714/* In jump.c, each label contains a count of the number
715 of LABEL_REFs that point at it, so unused labels can be deleted. */
be1bb652 716#define LABEL_NUSES(RTX) XCINT(RTX, 3, CODE_LABEL)
6f29feb1 717
8cd0faaf
CM		 718/* Associate a name with a CODE_LABEL. */
719#define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
720
e9a25f70 721/* The original regno this ADDRESSOF was built for. */
770ae6cc 722#define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
e9a25f70
JL		 723
724/* The variable in the register we took the address of. */
83ab3839 725#define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
e9a25f70 726
6f29feb1
JW		 727/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
728 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
729 be decremented and possibly the label can be deleted. */
83ab3839 730#define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
6f29feb1
JW		 731
732/* Once basic blocks are found in flow.c,
733 each CODE_LABEL starts a chain that goes through
734 all the LABEL_REFs that jump to that label.
be1bb652
RH		 735 The chain eventually winds up at the CODE_LABEL: it is circular. */
736#define LABEL_REFS(LABEL) XCEXP(LABEL, 4, CODE_LABEL)
6f29feb1
JW		 737\f
738/* This is the field in the LABEL_REF through which the circular chain
739 of references to a particular label is linked.
740 This chain is set up in flow.c. */
741
83ab3839 742#define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
6f29feb1
JW		 743
744/* Once basic blocks are found in flow.c,
745 Each LABEL_REF points to its containing instruction with this field. */
746
83ab3839 747#define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
6f29feb1 748
08394eef
BS		 749/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
750 the number the register originally had; for a pseudo register turned into
751 a hard reg this will hold the old pseudo register number. */
6f29feb1 752
770ae6cc 753#define REGNO(RTX) XCUINT(RTX, 0, REG)
08394eef 754#define ORIGINAL_REGNO(RTX) X0UINT(RTX, 1)
6f29feb1
JW		 755
756/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
757 is the current function's return value. */
758
759#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
760
761/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
762#define REG_USERVAR_P(RTX) ((RTX)->volatil)
763
3502dc9c
JDA		 764/* 1 in a REG rtx if the register is a pointer. */
765#define REG_POINTER(RTX) ((RTX)->frame_related)
766
cdbca172
JO		 767/* 1 if the given register REG corresponds to a hard register. */
768#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
769
770/* 1 if the given register number REG_NO corresponds to a hard register. */
771#define HARD_REGISTER_NUM_P(REG_NO) (REG_NO < FIRST_PSEUDO_REGISTER)
772
6f29feb1
JW		 773/* For a CONST_INT rtx, INTVAL extracts the integer. */
774
83ab3839 775#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
6f29feb1 776
a36556a8
ZW		 777/* For a CONST_DOUBLE:
778 The usual two ints that hold the value.
779 For a DImode, that is all there are;
780 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
781 For a float, the number of ints varies,
782 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
783 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
784#define CONST_DOUBLE_LOW(r) XCWINT (r, 2, CONST_DOUBLE)
785#define CONST_DOUBLE_HIGH(r) XCWINT (r, 3, CONST_DOUBLE)
786
787/* Link for chain of all CONST_DOUBLEs in use in current function. */
788#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 1, CONST_DOUBLE)
789/* The MEM which represents this CONST_DOUBLE's value in memory,
790 or const0_rtx if no MEM has been made for it yet,
791 or cc0_rtx if it is not on the chain. */
792#define CONST_DOUBLE_MEM(r) XCEXP (r, 0, CONST_DOUBLE)
793
6f29feb1 794/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
ddef6bc7 795 SUBREG_BYTE extracts the byte-number. */
6f29feb1 796
83ab3839 797#define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
ddef6bc7
JJ		 798#define SUBREG_BYTE(RTX) XCUINT(RTX, 1, SUBREG)
799
800/* in rtlanal.c */
801extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
802 enum machine_mode,
803 unsigned int,
804 enum machine_mode));
805extern unsigned int subreg_regno PARAMS ((rtx));
6f29feb1 806
07be3989
RK		 807/* 1 if the REG contained in SUBREG_REG is already known to be
808 sign- or zero-extended from the mode of the SUBREG to the mode of
809 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
f590cca1 810 extension.
07be3989
RK		 811
812 When used as a LHS, is means that this extension must be done
813 when assigning to SUBREG_REG. */
814
815#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
816#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
817
6f29feb1
JW		 818/* Access various components of an ASM_OPERANDS rtx. */
819
83ab3839
RH		 820#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
821#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
822#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
823#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
824#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
825#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
826#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
6462bb43
AO		 827#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
828 XCVECEXP ((RTX), 4, (N), ASM_OPERANDS)
3bdf5ad1
RK		 829#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
830 XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
831#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
832 GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
83ab3839
RH		 833#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
834#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
6f29feb1
JW		 835
836/* For a MEM rtx, 1 if it's a volatile reference.
837 Also in an ASM_OPERANDS rtx. */
838#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
839
3bdf5ad1
RK		 840/* For a MEM rtx, 1 if it refers to an aggregate, either to the
841 aggregate itself of to a field of the aggregate. If zero, RTX may
4eb00163 842 or may not be such a reference. */
6f29feb1
JW		 843#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
844
c6df88cb
MM		 845/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
846 not refer to a scalar.*/
847#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
848
c6df88cb
MM		 849/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
850 RTX. Otherwise, vice versa. Use this macro only when you are
851 *sure* that you know that the MEM is in a structure, or is a
852 scalar. VAL is evaluated only once. */
f9e158c3
JM		 853#define MEM_SET_IN_STRUCT_P(RTX, VAL) do { \
854 if (VAL) \
855 { \
856 MEM_IN_STRUCT_P (RTX) = 1; \
857 MEM_SCALAR_P (RTX) = 0; \
858 } \
859 else \
860 { \
861 MEM_IN_STRUCT_P (RTX) = 0; \
862 MEM_SCALAR_P (RTX) = 1; \
863 } \
864} while (0)
c6df88cb 865
41472af8
MM		 866/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
867 set, and may alias anything. Otherwise, the MEM can only alias
868 MEMs in the same alias set. This value is set in a
869 language-dependent manner in the front-end, and should not be
870 altered in the back-end. These set numbers are tested for zero,
871 and compared for equality; they have no other significance. In
872 some front-ends, these numbers may correspond in some way to types,
873 or other language-level entities, but they need not, and the
874 back-end makes no such assumptions. */
3bdf5ad1
RK		 875#define MEM_ALIAS_SET(RTX) XCWINT(RTX, 1, MEM)
876
877/* Copy the attributes that apply to memory locations from RHS to LHS. */
878#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
879 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
880 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
881 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
882 MEM_ALIAS_SET (LHS) = MEM_ALIAS_SET (RHS), \
883 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS))
41472af8 884
6f29feb1
JW		 885/* For a LABEL_REF, 1 means that this reference is to a label outside the
886 loop containing the reference. */
887#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
888
adfaf10a 889/* For a LABEL_REF, 1 means it is for a nonlocal label. */
2a406d2a 890/* Likewise in an EXPR_LIST for a REG_LABEL note. */
adfaf10a
RS		 891#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
892
6f29feb1
JW		 893/* For a CODE_LABEL, 1 means always consider this label to be needed. */
894#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
895
896/* For a REG, 1 means the register is used only in an exit test of a loop. */
897#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
898
899/* During sched, for an insn, 1 means that the insn must be scheduled together
d45cf215 900 with the preceding insn. */
6f29feb1
JW		 901#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
902
c376c05b
TW		 903/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
904 cost of the dependence link. The cost of executing an instruction
905 may vary based on how the results are used. LINK_COST_ZERO is 1 when
906 the cost through the link varies and is unchanged (i.e., the link has
907 zero additional cost). LINK_COST_FREE is 1 when the cost through the
908 link is zero (i.e., the link makes the cost free). In other cases,
909 the adjustment to the cost is recomputed each time it is needed. */
910#define LINK_COST_ZERO(X) ((X)->jump)
911#define LINK_COST_FREE(X) ((X)->call)
912
6f29feb1
JW		 913/* For a SET rtx, SET_DEST is the place that is set
914 and SET_SRC is the value it is set to. */
83ab3839
RH		 915#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
916#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
6f29feb1
JW		 917
918/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
83ab3839
RH		 919#define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
920#define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
6f29feb1 921
0c99ec5c
RH		 922/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
923 conditionally executing the code on, COND_EXEC_CODE is the code
924 to execute if the condition is true. */
925#define COND_EXEC_TEST(RTX) XCEXP(RTX, 0, COND_EXEC)
926#define COND_EXEC_CODE(RTX) XCEXP(RTX, 1, COND_EXEC)
927
6f29feb1
JW		 928/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
929#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
930
bd7cf17e
JJ		 931/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
932#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
933
6f29feb1
JW		 934/* Flag in a SYMBOL_REF for machine-specific purposes. */
935#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
936
937/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
938#define SYMBOL_REF_USED(RTX) ((RTX)->used)
939
ff0b6b99
FS		 940/* 1 means a SYMBOL_REF is weak. */
941#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
942
6f29feb1
JW		 943/* Define a macro to look for REG_INC notes,
944 but save time on machines where they never exist. */
945
58e54c44
RS		 946/* Don't continue this line--convex cc version 4.1 would lose. */
947#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 948#define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
949#else
950#define FIND_REG_INC_NOTE(insn, reg) 0
951#endif
952
953/* Indicate whether the machine has any sort of auto increment addressing.
954 If not, we can avoid checking for REG_INC notes. */
955
58e54c44
RS		 956/* Don't continue this line--convex cc version 4.1 would lose. */
957#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 958#define AUTO_INC_DEC
959#endif
0dfa1860 960
940da324
JL		 961#ifndef HAVE_PRE_INCREMENT
962#define HAVE_PRE_INCREMENT 0
963#endif
964
965#ifndef HAVE_PRE_DECREMENT
966#define HAVE_PRE_DECREMENT 0
967#endif
968
969#ifndef HAVE_POST_INCREMENT
970#define HAVE_POST_INCREMENT 0
971#endif
972
973#ifndef HAVE_POST_DECREMENT
974#define HAVE_POST_DECREMENT 0
975#endif
976
4b983fdc
RH		 977#ifndef HAVE_POST_MODIFY_DISP
978#define HAVE_POST_MODIFY_DISP 0
979#endif
980
981#ifndef HAVE_POST_MODIFY_REG
982#define HAVE_POST_MODIFY_REG 0
983#endif
984
985#ifndef HAVE_PRE_MODIFY_DISP
986#define HAVE_PRE_MODIFY_DISP 0
987#endif
988
989#ifndef HAVE_PRE_MODIFY_REG
990#define HAVE_PRE_MODIFY_REG 0
991#endif
992
6e01bd94
MH		 993
994/* Some architectures do not have complete pre/post increment/decrement
995 instruction sets, or only move some modes efficiently. These macros
996 allow us to tune autoincrement generation. */
997
998#ifndef USE_LOAD_POST_INCREMENT
999#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1000#endif
1001
1002#ifndef USE_LOAD_POST_DECREMENT
1003#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1004#endif
1005
1006#ifndef USE_LOAD_PRE_INCREMENT
1007#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1008#endif
1009
1010#ifndef USE_LOAD_PRE_DECREMENT
1011#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1012#endif
1013
1014#ifndef USE_STORE_POST_INCREMENT
1015#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1016#endif
1017
1018#ifndef USE_STORE_POST_DECREMENT
1019#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1020#endif
1021
1022#ifndef USE_STORE_PRE_INCREMENT
1023#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1024#endif
1025
1026#ifndef USE_STORE_PRE_DECREMENT
1027#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1028#endif
1029
1030
0dfa1860
MM		 1031/* Accessors for RANGE_INFO. */
1032/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1033#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
0dfa1860
MM		 1034
1035/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1036#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
0dfa1860
MM		 1037
1038/* For RANGE_{START,END} notes, return the vector containing the registers used
1039 in the range. */
83ab3839
RH		 1040#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1041#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1042#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
0dfa1860
MM		 1043
1044/* For RANGE_{START,END} notes, the number of calls within the range. */
83ab3839 1045#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
0dfa1860
MM		 1046
1047/* For RANGE_{START,END} notes, the number of insns within the range. */
83ab3839 1048#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
0dfa1860
MM		 1049
1050/* For RANGE_{START,END} notes, a unique # to identify this range. */
83ab3839 1051#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
0dfa1860
MM		 1052
1053/* For RANGE_{START,END} notes, the basic block # the range starts with. */
83ab3839 1054#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
0dfa1860
MM		 1055
1056/* For RANGE_{START,END} notes, the basic block # the range ends with. */
83ab3839 1057#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
0dfa1860
MM		 1058
1059/* For RANGE_{START,END} notes, the loop depth the range is in. */
83ab3839 1060#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
0dfa1860
MM		 1061
1062/* For RANGE_{START,END} notes, the bitmap of live registers at the start
1063 of the range. */
83ab3839 1064#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
0dfa1860
MM		 1065
1066/* For RANGE_{START,END} notes, the bitmap of live registers at the end
1067 of the range. */
83ab3839 1068#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
0dfa1860
MM		 1069
1070/* For RANGE_START notes, the marker # of the start of the range. */
83ab3839 1071#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
0dfa1860
MM		 1072
1073/* For RANGE_START notes, the marker # of the end of the range. */
83ab3839 1074#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
0dfa1860
MM		 1075
1076/* Original pseudo register # for a live range note. */
83ab3839 1077#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
0dfa1860
MM		 1078
1079/* Pseudo register # original register is copied into or -1. */
83ab3839 1080#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
0dfa1860
MM		 1081
1082/* How many times a register in a live range note was referenced. */
83ab3839 1083#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
0dfa1860
MM		 1084
1085/* How many times a register in a live range note was set. */
83ab3839 1086#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
0dfa1860
MM		 1087
1088/* How many times a register in a live range note died. */
83ab3839 1089#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
0dfa1860
MM		 1090
1091/* Whether the original value is needed to be copied into the range register at
1092 the start of the range. */
83ab3839 1093#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
0dfa1860
MM		 1094
1095/* # of insns the register copy is live over. */
83ab3839 1096#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
0dfa1860
MM		 1097
1098/* # of calls the register copy is live over. */
83ab3839 1099#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
0dfa1860
MM		 1100
1101/* DECL_NODE pointer of the declaration if the register is a user defined
1102 variable. */
83ab3839 1103#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
0dfa1860
MM		 1104
1105/* BLOCK_NODE pointer to the block the variable is declared in if the
1106 register is a user defined variable. */
83ab3839 1107#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
0dfa1860
MM		 1108
1109/* EXPR_LIST of the distinct ranges a variable is in. */
1110#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1111
1112/* Block a variable is declared in. */
1113#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1114
1115/* # of distinct ranges a variable is in. */
1116#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1117
1118/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1119#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1120
1121/* For a NOTE_INSN_LIVE note, the original basic block number. */
1122#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
4e872036
AS		 1123
1124/* Determine if the insn is a PHI node. */
1125#define PHI_NODE_P(X) \
1126 (X && GET_CODE (X) == INSN \
1127 && GET_CODE (PATTERN (X)) == SET \
1128 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
6f29feb1 1129\f
bf6bb899
BS		 1130/* Nonzero if we need to distinguish between the return value of this function
1131 and the return value of a function called by this function. This helps
1132 integrate.c.
1133 This is 1 until after the rtl generation pass. */
1134extern int rtx_equal_function_value_matters;
1135
1b3d8f8a
GK		 1136/* Nonzero when we are generating CONCATs. */
1137extern int generating_concat_p;
1138
6f29feb1
JW		 1139/* Generally useful functions. */
1140
ac957f13 1141/* In expmed.c */
cdadb1dd 1142extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
5f4f0e22
CH		 1143
1144#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1145
1146#define plus_constant_for_output(X,C) \
1147 plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
1148
5f2d6cfa
MM		 1149/* In builtins.c */
1150extern rtx expand_builtin_expect_jump PARAMS ((union tree_node *, rtx, rtx));
1151
50b2596f 1152/* In explow.c */
c6991660 1153extern void set_stack_check_libfunc PARAMS ((rtx));
cdadb1dd 1154extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
7e4ce834 1155 enum machine_mode));
cdadb1dd
KG		 1156extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1157extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1158extern void optimize_save_area_alloca PARAMS ((rtx));
5f4f0e22 1159
4eb00163 1160/* In emit-rtl.c */
cdadb1dd 1161extern rtx gen_rtx PARAMS ((enum rtx_code,
bdea67fa 1162 enum machine_mode, ...));
cdadb1dd
KG		 1163extern rtvec gen_rtvec PARAMS ((int, ...));
1164
4eb00163 1165/* In other files */
cdadb1dd
KG		 1166extern rtx rtx_alloc PARAMS ((RTX_CODE));
1167extern rtvec rtvec_alloc PARAMS ((int));
1168extern rtx copy_insn_1 PARAMS ((rtx));
1169extern rtx copy_insn PARAMS ((rtx));
4eb00163
JO		 1170
1171/* In rtl.c */
cdadb1dd 1172extern rtx copy_rtx PARAMS ((rtx));
4eb00163
JO		 1173
1174/* In emit-rtl.c */
cdadb1dd 1175extern rtx copy_rtx_if_shared PARAMS ((rtx));
4eb00163
JO		 1176
1177/* In rtl.c */
cdadb1dd
KG		 1178extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1179extern rtx shallow_copy_rtx PARAMS ((rtx));
1180extern int rtx_equal_p PARAMS ((rtx, rtx));
4eb00163
JO		 1181
1182/* In emit-rtl.c */
cdadb1dd
KG		 1183extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1184extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1185extern rtx gen_label_rtx PARAMS ((void));
ddef6bc7 1186extern int subreg_hard_regno PARAMS ((rtx, int));
cdadb1dd
KG		 1187extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1188extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1189
1190/* In cse.c */
cdadb1dd 1191extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1192
1193/* In emit-rtl.c */
cdadb1dd
KG		 1194extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
1195extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1196extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
770ae6cc
RK		 1197extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1198 enum machine_mode));
ddef6bc7
JJ		 1199extern rtx constant_subword PARAMS ((rtx, int,
1200 enum machine_mode));
4eb00163
JO		 1201
1202/* In emit-rtl.c */
770ae6cc
RK		 1203extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1204 enum machine_mode));
cdadb1dd 1205extern int subreg_lowpart_p PARAMS ((rtx));
e0e08ac2
JH		 1206extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1207 enum machine_mode));
1208extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1209 enum machine_mode));
cdadb1dd
KG		 1210extern rtx make_safe_from PARAMS ((rtx, rtx));
1211extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
cdadb1dd
KG		 1212extern rtx get_insns PARAMS ((void));
1213extern const char *get_insn_name PARAMS ((int));
1214extern rtx get_last_insn PARAMS ((void));
1215extern rtx get_last_insn_anywhere PARAMS ((void));
1216extern void start_sequence PARAMS ((void));
1217extern void push_to_sequence PARAMS ((rtx));
1218extern void end_sequence PARAMS ((void));
c14f7160
ML		 1219extern void push_to_full_sequence PARAMS ((rtx, rtx));
1220extern void end_full_sequence PARAMS ((rtx*, rtx*));
cdadb1dd 1221extern rtx gen_sequence PARAMS ((void));
4eb00163
JO		 1222
1223/* In varasm.c */
cdadb1dd
KG		 1224extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1225extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
4eb00163 1226
4eb00163 1227/* In varasm.c */
cdadb1dd
KG		 1228extern rtx get_pool_constant PARAMS ((rtx));
1229extern enum machine_mode get_pool_mode PARAMS ((rtx));
1230extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1231extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1232extern int get_pool_offset PARAMS ((rtx));
1233extern rtx simplify_subtraction PARAMS ((rtx));
4eb00163
JO		 1234
1235/* In function.c */
cdadb1dd 1236extern rtx assign_stack_local PARAMS ((enum machine_mode,
e5e809f4 1237 HOST_WIDE_INT, int));
cdadb1dd 1238extern rtx assign_stack_temp PARAMS ((enum machine_mode,
e5e809f4 1239 HOST_WIDE_INT, int));
cdadb1dd 1240extern rtx assign_temp PARAMS ((union tree_node *,
e5e809f4 1241 int, int, int));
4eb00163 1242/* In emit-rtl.c */
cdadb1dd
KG		 1243extern rtx emit_insn_before PARAMS ((rtx, rtx));
1244extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1245extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1246extern rtx emit_barrier_before PARAMS ((rtx));
1247extern rtx emit_label_before PARAMS ((rtx, rtx));
1248extern rtx emit_note_before PARAMS ((int, rtx));
1249extern rtx emit_insn_after PARAMS ((rtx, rtx));
1250extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1251extern rtx emit_barrier_after PARAMS ((rtx));
1252extern rtx emit_label_after PARAMS ((rtx, rtx));
1253extern rtx emit_note_after PARAMS ((int, rtx));
3cce094d 1254extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
cdadb1dd
KG		 1255extern rtx emit_insn PARAMS ((rtx));
1256extern rtx emit_insns PARAMS ((rtx));
1257extern rtx emit_insns_before PARAMS ((rtx, rtx));
1258extern rtx emit_insns_after PARAMS ((rtx, rtx));
1259extern rtx emit_jump_insn PARAMS ((rtx));
1260extern rtx emit_call_insn PARAMS ((rtx));
1261extern rtx emit_label PARAMS ((rtx));
1262extern rtx emit_barrier PARAMS ((void));
3cce094d
KG		 1263extern rtx emit_line_note PARAMS ((const char *, int));
1264extern rtx emit_note PARAMS ((const char *, int));
1265extern rtx emit_line_note_force PARAMS ((const char *, int));
cdadb1dd
KG		 1266extern rtx make_insn_raw PARAMS ((rtx));
1267extern rtx previous_insn PARAMS ((rtx));
1268extern rtx next_insn PARAMS ((rtx));
1269extern rtx prev_nonnote_insn PARAMS ((rtx));
1270extern rtx next_nonnote_insn PARAMS ((rtx));
1271extern rtx prev_real_insn PARAMS ((rtx));
1272extern rtx next_real_insn PARAMS ((rtx));
1273extern rtx prev_active_insn PARAMS ((rtx));
1274extern rtx next_active_insn PARAMS ((rtx));
69732dcb 1275extern int active_insn_p PARAMS ((rtx));
cdadb1dd
KG		 1276extern rtx prev_label PARAMS ((rtx));
1277extern rtx next_label PARAMS ((rtx));
1278extern rtx next_cc0_user PARAMS ((rtx));
1279extern rtx prev_cc0_setter PARAMS ((rtx));
4eb00163
JO		 1280
1281/* In jump.c */
cdadb1dd
KG		 1282extern rtx next_nondeleted_insn PARAMS ((rtx));
1283extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
7913f3d0 1284extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
cdadb1dd
KG		 1285extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1286extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1287extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
90a74703 1288extern void mark_jump_label PARAMS ((rtx, rtx, int, int));
4eb00163 1289
4eb00163 1290/* In jump.c */
cdadb1dd
KG		 1291extern rtx squeeze_notes PARAMS ((rtx, rtx));
1292extern rtx delete_insn PARAMS ((rtx));
1293extern void delete_jump PARAMS ((rtx));
1294extern void delete_barrier PARAMS ((rtx));
1295extern rtx get_label_before PARAMS ((rtx));
1296extern rtx get_label_after PARAMS ((rtx));
1297extern rtx follow_jumps PARAMS ((rtx));
4eb00163
JO		 1298
1299/* In recog.c */
cdadb1dd 1300extern rtx adj_offsettable_operand PARAMS ((rtx, int));
4eb00163
JO		 1301
1302/* In emit-rtl.c */
cdadb1dd 1303extern rtx try_split PARAMS ((rtx, rtx, int));
4eb00163
JO		 1304
1305/* In unknown file */
cdadb1dd 1306extern rtx split_insns PARAMS ((rtx, rtx));
4eb00163
JO		 1307
1308/* In simplify-rtx.c */
d9c695ff
RK		 1309extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1310 enum machine_mode, rtx,
1311 enum machine_mode));
1312extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1313 enum machine_mode, rtx,
1314 rtx));
1315extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1316 enum machine_mode,
1317 enum machine_mode, rtx, rtx,
1318 rtx));
1319extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1320 enum machine_mode, rtx,
1321 rtx));
1322extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1323 enum machine_mode,
1324 rtx, rtx));
1325extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1326 enum machine_mode, rtx,
1327 enum machine_mode));
1328extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1329 enum machine_mode,
1330 enum machine_mode,
1331 rtx, rtx, rtx));
1332extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
141e454b 1333 enum machine_mode,
d9c695ff
RK		 1334 enum machine_mode,
1335 rtx, rtx));
eea50aa0
JH		 1336extern rtx simplify_subreg PARAMS ((enum machine_mode,
1337 rtx,
1338 enum machine_mode,
1339 unsigned int));
949c5d62
JH		 1340extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1341 rtx,
1342 enum machine_mode,
1343 unsigned int));
d9c695ff 1344extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
cdadb1dd 1345extern rtx simplify_rtx PARAMS ((rtx));
4eb00163 1346
4eb00163 1347/* In function.c */
cdadb1dd 1348extern rtx gen_mem_addressof PARAMS ((rtx, union tree_node *));
4eb00163 1349
4eb00163 1350/* In regclass.c */
770ae6cc
RK		 1351extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1352 unsigned int));
4eb00163
JO		 1353
1354/* In emit-rtl.c */
cdadb1dd 1355extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
9ae8ffe7 1356
e9a25f70
JL		 1357/* Functions in rtlanal.c */
1358
b1cdafbb
JH		 1359/* Single set is implemented as macro for performance reasons. */
1360#define single_set(I) (INSN_P (I) \
1361 ? (GET_CODE (PATTERN (I)) == SET \
1362 ? PATTERN (I) : single_set_1 (I)) \
1363 : NULL_RTX)
2130b7fb 1364#define single_set_1(I) single_set_2 (I, PATTERN (I))
b1cdafbb 1365
e38fe8e0 1366extern int rtx_addr_can_trap_p PARAMS ((rtx));
cdadb1dd 1367extern int rtx_unstable_p PARAMS ((rtx));
e38fe8e0
BS		 1368extern int rtx_varies_p PARAMS ((rtx, int));
1369extern int rtx_addr_varies_p PARAMS ((rtx, int));
cdadb1dd
KG		 1370extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1371extern rtx get_related_value PARAMS ((rtx));
1372extern int reg_mentioned_p PARAMS ((rtx, rtx));
4b983fdc 1373extern int count_occurrences PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1374extern int reg_referenced_p PARAMS ((rtx, rtx));
1375extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1376extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1377extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1378extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
e5c56fd9 1379extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1380extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1381extern int no_labels_between_p PARAMS ((rtx, rtx));
1382extern int no_jumps_between_p PARAMS ((rtx, rtx));
1383extern int modified_in_p PARAMS ((rtx, rtx));
4eb00163 1384extern int insn_dependent_p PARAMS ((rtx, rtx));
cdadb1dd 1385extern int reg_set_p PARAMS ((rtx, rtx));
2130b7fb 1386extern rtx single_set_2 PARAMS ((rtx, rtx));
cdadb1dd 1387extern int multiple_sets PARAMS ((rtx));
7142e318 1388extern int set_noop_p PARAMS ((rtx));
cdadb1dd 1389extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
770ae6cc
RK		 1390extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1391 rtx, rtx *));
cdadb1dd 1392extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
91b2d119 1393extern rtx set_of PARAMS ((rtx, rtx));
770ae6cc
RK		 1394extern void note_stores PARAMS ((rtx,
1395 void (*) (rtx, rtx, void *),
1396 void *));
e2373f95
RK		 1397extern void note_uses PARAMS ((rtx *,
1398 void (*) (rtx *, void *),
1399 void *));
cdadb1dd
KG		 1400extern rtx reg_set_last PARAMS ((rtx, rtx));
1401extern int dead_or_set_p PARAMS ((rtx, rtx));
770ae6cc 1402extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
cdadb1dd 1403extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
770ae6cc
RK		 1404extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1405 unsigned int));
d9c695ff 1406extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
cdadb1dd 1407extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
770ae6cc
RK		 1408extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1409 unsigned int));
cdadb1dd
KG		 1410extern void remove_note PARAMS ((rtx, rtx));
1411extern int side_effects_p PARAMS ((rtx));
1412extern int volatile_refs_p PARAMS ((rtx));
1413extern int volatile_insn_p PARAMS ((rtx));
1414extern int may_trap_p PARAMS ((rtx));
1415extern int inequality_comparisons_p PARAMS ((rtx));
1416extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
770ae6cc
RK		 1417extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1418 int));
cdadb1dd
KG		 1419extern int computed_jump_p PARAMS ((rtx));
1420typedef int (*rtx_function) PARAMS ((rtx *, void *));
1421extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
770ae6cc 1422extern rtx regno_use_in PARAMS ((unsigned int, rtx));
cdadb1dd
KG		 1423extern int auto_inc_p PARAMS ((rtx));
1424extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1425extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
db7ba742 1426extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
6f29feb1 1427
ae0b51ef
JL		 1428/* flow.c */
1429
cdadb1dd
KG		 1430extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1431void init_EXPR_INSN_LIST_cache PARAMS ((void));
1432void free_EXPR_LIST_list PARAMS ((rtx *));
1433void free_INSN_LIST_list PARAMS ((rtx *));
1434void free_EXPR_LIST_node PARAMS ((rtx));
1435void free_INSN_LIST_node PARAMS ((rtx));
1436rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1437rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
d9d4fb43 1438void clear_log_links PARAMS ((rtx));
ae0b51ef
JL		 1439
1440/* regclass.c */
1441
6f29feb1
JW		 1442/* Maximum number of parallel sets and clobbers in any insn in this fn.
1443 Always at least 3, since the combiner could put that many togetherm
1444 and we want this to remain correct for all the remaining passes. */
1445
1446extern int max_parallel;
1447
e0c6d139 1448/* Free up register info memory. */
cdadb1dd 1449extern void free_reg_info PARAMS ((void));
e0c6d139 1450
ae0b51ef 1451/* recog.c */
cdadb1dd 1452extern int asm_noperands PARAMS ((rtx));
3cce094d 1453extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
9b3142b3
KG		 1454 const char **,
1455 enum machine_mode *));
6f29feb1 1456
cdadb1dd
KG		 1457extern enum reg_class reg_preferred_class PARAMS ((int));
1458extern enum reg_class reg_alternate_class PARAMS ((int));
6f29feb1 1459
cdadb1dd 1460extern rtx get_first_nonparm_insn PARAMS ((void));
6f29feb1 1461
cdadb1dd 1462extern void split_all_insns PARAMS ((int));
6a73406e 1463
68d75312 1464#define MAX_SAVED_CONST_INT 64
5da077de 1465extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
68d75312 1466
5da077de
AS		 1467#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1468#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1469#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1470#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
6f29feb1 1471extern rtx const_true_rtx;
a8efe40d
RK		 1472
1473extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1474
f590cca1 1475/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
a8efe40d
RK		 1476 same as VOIDmode. */
1477
1478#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1479
1480/* Likewise, for the constants 1 and 2. */
1481
1482#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1483#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
6f29feb1 1484
5da077de
AS		 1485/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1486 is used to represent the frame pointer. This is because the
1487 hard frame pointer and the automatic variables are separated by an amount
1488 that cannot be determined until after register allocation. We can assume
1489 that in this case ELIMINABLE_REGS will be defined, one action of which
1490 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1491#ifndef HARD_FRAME_POINTER_REGNUM
1492#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1493#endif
1494
1495/* Index labels for global_rtl. */
1496enum global_rtl_index
68d75312 1497{
5da077de
AS		 1498 GR_PC,
1499 GR_CC0,
1500 GR_STACK_POINTER,
1501 GR_FRAME_POINTER,
1502/* For register elimination to work properly these hard_frame_pointer_rtx,
1503 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1504 the same register. */
1505#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1506 GR_ARG_POINTER = GR_FRAME_POINTER,
1507#endif
1508#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1509 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1510#else
1511 GR_HARD_FRAME_POINTER,
1512#endif
1513#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1514#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1515 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1516#else
1517 GR_ARG_POINTER,
1518#endif
1519#endif
1520 GR_VIRTUAL_INCOMING_ARGS,
1521 GR_VIRTUAL_STACK_ARGS,
1522 GR_VIRTUAL_STACK_DYNAMIC,
1523 GR_VIRTUAL_OUTGOING_ARGS,
1524 GR_VIRTUAL_CFA,
1525
1526 GR_MAX
1527};
1528
1529/* Pointers to standard pieces of rtx are stored here. */
1530extern rtx global_rtl[GR_MAX];
1531
1532/* Standard pieces of rtx, to be substituted directly into things. */
1533#define pc_rtx (global_rtl[GR_PC])
1534#define cc0_rtx (global_rtl[GR_CC0])
68d75312 1535
6f29feb1
JW		 1536/* All references to certain hard regs, except those created
1537 by allocating pseudo regs into them (when that's possible),
1538 go through these unique rtx objects. */
5da077de
AS		 1539#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1540#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1541#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1542#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
68d75312 1543
6f29feb1
JW		 1544extern rtx pic_offset_table_rtx;
1545extern rtx struct_value_rtx;
1546extern rtx struct_value_incoming_rtx;
1547extern rtx static_chain_rtx;
1548extern rtx static_chain_incoming_rtx;
07ebc930 1549extern rtx return_address_pointer_rtx;
3b80f6ca
RH		 1550
1551/* Include the RTL generation functions. */
1552
1553#ifndef NO_GENRTL_H
1554#include "genrtl.h"
1555#endif
1556
41472af8
MM		 1557/* There are some RTL codes that require special attention; the
1558 generation functions included above do the raw handling. If you
b4213325
MM		 1559 add to this list, modify special_rtx in gengenrtl.c as well. You
1560 should also modify gen_rtx to use the special function. */
3b80f6ca 1561
cdadb1dd 1562extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
0133b7d9 1563 HOST_WIDE_INT, HOST_WIDE_INT));
cdadb1dd 1564extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
08394eef 1565extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
cdadb1dd 1566extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
ddef6bc7 1567extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
cdadb1dd 1568extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
3b80f6ca 1569
ddef6bc7
JJ		 1570extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1571
aefdd5ab
JL		 1572/* We need the cast here to ensure that we get the same result both with
1573 and without prototypes. */
1574#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
3b80f6ca 1575
6f29feb1
JW		 1576/* Virtual registers are used during RTL generation to refer to locations into
1577 the stack frame when the actual location isn't known until RTL generation
1578 is complete. The routine instantiate_virtual_regs replaces these with
1579 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1580 a constant. */
1581
1582#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1583
1584/* This points to the first word of the incoming arguments passed on the stack,
1585 either by the caller or by the callee when pretending it was passed by the
1586 caller. */
1587
5da077de 1588#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
6f29feb1
JW		 1589
1590#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1591
60343c3b 1592/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
6f29feb1
JW		 1593 variable on the stack. Otherwise, it points to the first variable on
1594 the stack. */
1595
5da077de 1596#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
6f29feb1
JW		 1597
1598#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1599
1600/* This points to the location of dynamically-allocated memory on the stack
1601 immediately after the stack pointer has been adjusted by the amount
1602 desired. */
1603
5da077de 1604#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
6f29feb1
JW		 1605
1606#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1607
1608/* This points to the location in the stack at which outgoing arguments should
1609 be written when the stack is pre-pushed (arguments pushed using push
1610 insns always use sp). */
1611
5da077de 1612#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
6f29feb1
JW		 1613
1614#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1615
71038426
RH		 1616/* This points to the Canonical Frame Address of the function. This
1617 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1618 but is calculated relative to the arg pointer for simplicity; the
f590cca1 1619 frame pointer nor stack pointer are necessarily fixed relative to
71038426
RH		 1620 the CFA until after reload. */
1621
5da077de 1622#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
71038426
RH		 1623
1624#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1625
1626#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
6f29feb1 1627
848e0190
JH		 1628/* REGNUM never really appearing in the INSN stream. */
1629#define INVALID_REGNUM (~(unsigned int)0)
1630
cdadb1dd 1631extern rtx find_next_ref PARAMS ((rtx, rtx));
f837a861 1632
bd7cf17e 1633extern rtx output_constant_def PARAMS ((union tree_node *, int));
cdadb1dd 1634extern rtx immed_real_const PARAMS ((union tree_node *));
6f29feb1
JW		 1635
1636/* Define a default value for STORE_FLAG_VALUE. */
1637
1638#ifndef STORE_FLAG_VALUE
1639#define STORE_FLAG_VALUE 1
1640#endif
1641
0ea0e871
JL		 1642/* Nonzero after the second flow pass has completed.
1643 Set to 1 or 0 by toplev.c */
1644extern int flow2_completed;
1645
6f29feb1 1646/* Nonzero after end of reload pass.
0ea0e871 1647 Set to 1 or 0 by reload1.c. */
6f29feb1
JW		 1648
1649extern int reload_completed;
1650
1651/* Set to 1 while reload_as_needed is operating.
1652 Required by some machines to handle any generated moves differently. */
1653
1654extern int reload_in_progress;
1655
1656/* If this is nonzero, we do not bother generating VOLATILE
1657 around volatile memory references, and we are willing to
1658 output indirect addresses. If cse is to follow, we reject
1659 indirect addresses so a useful potential cse is generated;
1660 if it is used only once, instruction combination will produce
1661 the same indirect address eventually. */
1662extern int cse_not_expected;
1663
f1db3576
JL		 1664/* Set to nonzero before life analysis to indicate that it is unsafe to
1665 generate any new pseudo registers. */
1666extern int no_new_pseudos;
1667
f5118aa5 1668/* Translates rtx code to tree code, for those codes needed by
88efc60a
RK		 1669 REAL_ARITHMETIC. The function returns an int because the caller may not
1670 know what `enum tree_code' means. */
1671
cdadb1dd 1672extern int rtx_to_tree_code PARAMS ((enum rtx_code));
9ae8ffe7 1673
ac957f13 1674/* In tree.c */
ac957f13 1675struct obstack;
cdadb1dd 1676extern void gcc_obstack_init PARAMS ((struct obstack *));
1f8f4a0b 1677
ac957f13
JL		 1678/* In cse.c */
1679struct cse_basic_block_data;
f1c1dfc3
BS		 1680
1681/* Return the right cost to give to an operation
1682 to make the cost of the corresponding register-to-register instruction
1683 N times that of a fast register-to-register instruction. */
1684#define COSTS_N_INSNS(N) ((N) * 4)
1685
1686/* Maximum cost of a rtl expression. This value has the special meaning
1687 not to use an rtx with this cost under any circumstances. */
1688#define MAX_COST INT_MAX
1689
cdadb1dd 1690extern int rtx_cost PARAMS ((rtx, enum rtx_code));
01329426 1691extern int address_cost PARAMS ((rtx, enum machine_mode));
cdadb1dd 1692extern void delete_trivially_dead_insns PARAMS ((rtx, int));
ac957f13 1693#ifdef BUFSIZ
cdadb1dd 1694extern int cse_main PARAMS ((rtx, int, int, FILE *));
ac957f13 1695#endif
cdadb1dd 1696extern void cse_end_of_basic_block PARAMS ((rtx,
ac957f13
JL		 1697 struct cse_basic_block_data *,
1698 int, int, int));
1699
1700/* In jump.c */
cdadb1dd
KG		 1701extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1702extern int condjump_p PARAMS ((rtx));
e4c85816
JH		 1703extern int any_condjump_p PARAMS ((rtx));
1704extern int any_uncondjump_p PARAMS ((rtx));
1705extern int safe_to_remove_jump_p PARAMS ((rtx));
1706extern rtx pc_set PARAMS ((rtx));
cdadb1dd
KG		 1707extern rtx condjump_label PARAMS ((rtx));
1708extern int simplejump_p PARAMS ((rtx));
1709extern int returnjump_p PARAMS ((rtx));
1710extern int onlyjump_p PARAMS ((rtx));
1711extern int sets_cc0_p PARAMS ((rtx));
2ea64f10 1712extern int invert_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1713extern int invert_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1714extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1715extern int true_regnum PARAMS ((rtx));
2ea64f10 1716extern int redirect_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1717extern int redirect_jump PARAMS ((rtx, rtx, int));
cdadb1dd 1718extern void jump_optimize PARAMS ((rtx, int, int, int));
0a1c58a2 1719extern void jump_optimize_minimal PARAMS ((rtx));
cdadb1dd
KG		 1720extern void rebuild_jump_labels PARAMS ((rtx));
1721extern void thread_jumps PARAMS ((rtx, int, int));
cdadb1dd 1722extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
cdadb1dd 1723extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
ab94bc48
JH		 1724extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1725extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1726 rtx, rtx, rtx));
cdadb1dd
KG		 1727extern void delete_for_peephole PARAMS ((rtx, rtx));
1728extern int condjump_in_parallel_p PARAMS ((rtx));
1729extern void never_reached_warning PARAMS ((rtx));
ac957f13 1730
14bf4a33 1731/* Flags for jump_optimize() */
a05924f9
JH		 1732#define JUMP_CROSS_JUMP 1
1733#define JUMP_CROSS_JUMP_DEATH_MATTERS 2
1734#define JUMP_NOOP_MOVES 1
1735#define JUMP_AFTER_REGSCAN 1
14bf4a33 1736
ac957f13 1737/* In emit-rtl.c. */
cdadb1dd
KG		 1738extern int max_reg_num PARAMS ((void));
1739extern int max_label_num PARAMS ((void));
1740extern int get_first_label_num PARAMS ((void));
1741extern void delete_insns_since PARAMS ((rtx));
1742extern void mark_reg_pointer PARAMS ((rtx, int));
1743extern void mark_user_reg PARAMS ((rtx));
1744extern void reset_used_flags PARAMS ((rtx));
1745extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1746extern int get_max_uid PARAMS ((void));
1747extern int in_sequence_p PARAMS ((void));
1748extern void force_next_line_note PARAMS ((void));
1749extern void clear_emit_caches PARAMS ((void));
1750extern void init_emit PARAMS ((void));
1751extern void init_emit_once PARAMS ((int));
1752extern void push_topmost_sequence PARAMS ((void));
1753extern void pop_topmost_sequence PARAMS ((void));
1754extern int subreg_realpart_p PARAMS ((rtx));
1755extern void reverse_comparison PARAMS ((rtx));
1756extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1757extern void set_new_first_and_last_label_num PARAMS ((int, int));
1758extern void set_new_last_label_num PARAMS ((int));
d1b81779 1759extern void unshare_all_rtl_again PARAMS ((rtx));
cdadb1dd
KG		 1760extern void set_last_insn PARAMS ((rtx));
1761extern void link_cc0_insns PARAMS ((rtx));
1762extern void add_insn PARAMS ((rtx));
1763extern void add_insn_before PARAMS ((rtx, rtx));
1764extern void add_insn_after PARAMS ((rtx, rtx));
1765extern void remove_insn PARAMS ((rtx));
1766extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1767extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1768extern enum rtx_code classify_insn PARAMS ((rtx));
1769extern rtx emit PARAMS ((rtx));
a11759a3
JR		 1770/* Query and clear/ restore no_line_numbers. This is used by the
1771 switch / case handling in stmt.c to give proper line numbers in
1772 warnings about unreachable code. */
cdadb1dd
KG		 1773int force_line_numbers PARAMS ((void));
1774void restore_line_number_status PARAMS ((int old_value));
1775extern void renumber_insns PARAMS ((FILE *));
f8855270 1776extern void remove_unnecessary_notes PARAMS ((void));
ac957f13 1777
ac957f13 1778/* In combine.c */
770ae6cc
RK		 1779extern int combine_instructions PARAMS ((rtx, unsigned int));
1780extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1781extern rtx remove_death PARAMS ((unsigned int, rtx));
ac957f13 1782#ifdef BUFSIZ
cdadb1dd
KG		 1783extern void dump_combine_stats PARAMS ((FILE *));
1784extern void dump_combine_total_stats PARAMS ((FILE *));
ac957f13
JL		 1785#endif
1786
1787/* In sched.c. */
1788#ifdef BUFSIZ
cdadb1dd 1789extern void schedule_insns PARAMS ((FILE *));
18e720b3 1790extern void schedule_ebbs PARAMS ((FILE *));
ac957f13 1791#endif
cdadb1dd 1792extern void fix_sched_param PARAMS ((const char *, const char *));
ac957f13
JL		 1793
1794/* In print-rtl.c */
47c10e9b 1795extern const char *print_rtx_head;
cdadb1dd
KG		 1796extern void debug_rtx PARAMS ((rtx));
1797extern void debug_rtx_list PARAMS ((rtx, int));
4c85a96d 1798extern void debug_rtx_range PARAMS ((rtx, rtx));
cdadb1dd 1799extern rtx debug_rtx_find PARAMS ((rtx, int));
ac957f13 1800#ifdef BUFSIZ
cdadb1dd 1801extern void print_rtl PARAMS ((FILE *, rtx));
75b7557d 1802extern void print_simple_rtl PARAMS ((FILE *, rtx));
cdadb1dd
KG		 1803extern int print_rtl_single PARAMS ((FILE *, rtx));
1804extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
ac957f13
JL		 1805#endif
1806
1807/* In loop.c */
cdadb1dd
KG		 1808extern void init_loop PARAMS ((void));
1809extern rtx libcall_other_reg PARAMS ((rtx, rtx));
ac957f13 1810#ifdef BUFSIZ
1bf14ad7 1811extern void loop_optimize PARAMS ((rtx, FILE *, int));
ac957f13 1812#endif
cdadb1dd 1813extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
ac957f13
JL		 1814
1815/* In function.c */
cdadb1dd
KG		 1816extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1817extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1818extern int prologue_epilogue_contains PARAMS ((rtx));
0a1c58a2 1819extern int sibcall_epilogue_contains PARAMS ((rtx));
591ccf92 1820extern void preserve_rtl_expr_result PARAMS ((rtx));
cdadb1dd
KG		 1821extern void mark_temp_addr_taken PARAMS ((rtx));
1822extern void update_temp_slot_address PARAMS ((rtx, rtx));
cdadb1dd 1823extern void purge_addressof PARAMS ((rtx));
659e47fb 1824extern void purge_hard_subreg_sets PARAMS ((rtx));
ac957f13 1825
ac957f13 1826/* In stmt.c */
47ee9bcb 1827extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
cdadb1dd
KG		 1828extern void expand_null_return PARAMS ((void));
1829extern void emit_jump PARAMS ((rtx));
1830extern int preserve_subexpressions_p PARAMS ((void));
ac957f13
JL		 1831
1832/* In expr.c */
3bdf5ad1
RK		 1833extern void move_by_pieces PARAMS ((rtx, rtx,
1834 unsigned HOST_WIDE_INT,
1835 unsigned int));
2e245dac 1836
ac957f13 1837/* In flow.c */
cdadb1dd 1838extern void recompute_reg_usage PARAMS ((rtx, int));
ac957f13 1839#ifdef BUFSIZ
cdadb1dd
KG		 1840extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1841extern void dump_flow_info PARAMS ((FILE *));
ac957f13
JL		 1842#endif
1843
1844/* In expmed.c */
cdadb1dd
KG		 1845extern void init_expmed PARAMS ((void));
1846extern void expand_inc PARAMS ((rtx, rtx));
1847extern void expand_dec PARAMS ((rtx, rtx));
1848extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
ac957f13
JL		 1849 unsigned HOST_WIDE_INT, rtx,
1850 int, int));
1851
50b2596f
KG		 1852/* In gcse.c */
1853#ifdef BUFSIZ
cdadb1dd 1854extern int gcse_main PARAMS ((rtx, FILE *));
50b2596f
KG		 1855#endif
1856
ac957f13 1857/* In global.c */
cdadb1dd 1858extern void mark_elimination PARAMS ((int, int));
ac957f13 1859#ifdef BUFSIZ
cdadb1dd
KG		 1860extern int global_alloc PARAMS ((FILE *));
1861extern void dump_global_regs PARAMS ((FILE *));
ac957f13 1862#endif
cab634f2 1863#ifdef HARD_CONST
cdadb1dd 1864extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
cab634f2 1865#endif
d29c259b 1866extern void build_insn_chain PARAMS ((rtx));
ac957f13
JL		 1867
1868/* In regclass.c */
cdadb1dd
KG		 1869extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1870extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1871extern void globalize_reg PARAMS ((int));
1872extern void init_regs PARAMS ((void));
1873extern void init_reg_sets PARAMS ((void));
1874extern void regset_release_memory PARAMS ((void));
1875extern void regclass_init PARAMS ((void));
1876extern void regclass PARAMS ((rtx, int, FILE *));
770ae6cc
RK		 1877extern void reg_scan PARAMS ((rtx, unsigned int, int));
1878extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
cdadb1dd
KG		 1879extern void fix_register PARAMS ((const char *, int, int));
1880
1881extern void delete_null_pointer_checks PARAMS ((rtx));
a157febd 1882
50b2596f
KG		 1883/* In regmove.c */
1884#ifdef BUFSIZ
cdadb1dd 1885extern void regmove_optimize PARAMS ((rtx, int, FILE *));
50b2596f 1886#endif
1e7f0a48 1887extern void combine_stack_adjustments PARAMS ((void));
50b2596f
KG		 1888
1889/* In reorg.c */
1890#ifdef BUFSIZ
cdadb1dd 1891extern void dbr_schedule PARAMS ((rtx, FILE *));
50b2596f
KG		 1892#endif
1893
ac957f13
JL		 1894/* In local-alloc.c */
1895#ifdef BUFSIZ
cdadb1dd 1896extern void dump_local_alloc PARAMS ((FILE *));
ac957f13 1897#endif
cdadb1dd
KG		 1898extern int local_alloc PARAMS ((void));
1899extern int function_invariant_p PARAMS ((rtx));
ac957f13 1900
ac957f13 1901/* In profile.c */
cdadb1dd 1902extern void init_branch_prob PARAMS ((const char *));
51891abe
JH		 1903extern void branch_prob PARAMS ((void));
1904extern void end_branch_prob PARAMS ((void));
cdadb1dd 1905extern void output_func_start_profiler PARAMS ((void));
ac957f13
JL		 1906
1907/* In reg-stack.c */
1908#ifdef BUFSIZ
cdadb1dd 1909extern void reg_to_stack PARAMS ((rtx, FILE *));
ac957f13 1910#endif
ac957f13
JL		 1911
1912/* In fold-const.c */
05bccae2
RK		 1913extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1914 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1915 unsigned HOST_WIDE_INT *,
1916 HOST_WIDE_INT *));
1917extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1918 unsigned HOST_WIDE_INT *,
1919 HOST_WIDE_INT *));
1920extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1921 HOST_WIDE_INT,
1922 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1923 unsigned HOST_WIDE_INT *,
1924 HOST_WIDE_INT *));
1925extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1926 HOST_WIDE_INT, unsigned int,
1927 unsigned HOST_WIDE_INT *,
1928 HOST_WIDE_INT *, int));
1929extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1930 HOST_WIDE_INT, unsigned int,
1931 unsigned HOST_WIDE_INT *,
1932 HOST_WIDE_INT *, int));
1933extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1934 HOST_WIDE_INT, unsigned int,
1935 unsigned HOST_WIDE_INT *,
1936 HOST_WIDE_INT *));
1937extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1938 HOST_WIDE_INT, unsigned int,
1939 unsigned HOST_WIDE_INT *,
1940 HOST_WIDE_INT *));
ac957f13
JL		 1941
1942/* In calls.c */
ebb1b59a
BS		 1943enum libcall_type
1944{
1945 LCT_NORMAL = 0,
1946 LCT_CONST = 1,
1947 LCT_PURE = 2,
1948 LCT_CONST_MAKE_BLOCK = 3,
695ee791 1949 LCT_PURE_MAKE_BLOCK = 4,
9555a122
RH		 1950 LCT_NORETURN = 5,
1951 LCT_THROW = 6
ebb1b59a
BS		 1952};
1953
1954extern void emit_library_call PARAMS ((rtx, enum libcall_type,
1955 enum machine_mode, int,
1956 ...));
1957extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
1958 enum machine_mode, int,
1959 ...));
ac957f13
JL		 1960
1961/* In unroll.c */
cdadb1dd 1962extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
ac957f13
JL		 1963
1964/* In varasm.c */
cdadb1dd 1965extern int in_data_section PARAMS ((void));
cdadb1dd 1966extern void init_varasm_once PARAMS ((void));
ac957f13
JL		 1967
1968/* In rtl.c */
cdadb1dd 1969extern void init_rtl PARAMS ((void));
c25c12b8
R		 1970extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
1971 void *));
1972struct md_constant { char *name, *value; };
ac957f13 1973
bcdaba58 1974#ifdef BUFSIZ
cdadb1dd
KG		 1975extern int read_skip_spaces PARAMS ((FILE *));
1976extern rtx read_rtx PARAMS ((FILE *));
bcdaba58
RH		 1977#endif
1978
1979extern const char *read_rtx_filename;
1980extern int read_rtx_lineno;
1981
987009bf
ZW		 1982/* Redefine abort to report an internal error w/o coredump, and
1983 reporting the location of the error in the source file. This logic
1984 is duplicated in rtl.h and tree.h because every file that needs the
1985 special abort includes one or both. toplev.h gets too few files,
1986 system.h gets too many. */
1987
cdadb1dd 1988extern void fancy_abort PARAMS ((const char *, int, const char *))
987009bf 1989 ATTRIBUTE_NORETURN;
fbfc1192 1990#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
987009bf 1991
ac957f13 1992/* In alias.c */
db048faf 1993extern rtx canon_rtx PARAMS ((rtx));
cdadb1dd 1994extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
e38fe8e0 1995 int (*)(rtx, int)));
a13d4ebf
AM		 1996extern rtx get_addr PARAMS ((rtx));
1997extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
1998 rtx, int (*)(rtx, int)));
cdadb1dd
KG		 1999extern int read_dependence PARAMS ((rtx, rtx));
2000extern int anti_dependence PARAMS ((rtx, rtx));
2001extern int output_dependence PARAMS ((rtx, rtx));
2002extern void mark_constant_function PARAMS ((void));
2003extern void init_alias_once PARAMS ((void));
2004extern void init_alias_analysis PARAMS ((void));
2005extern void end_alias_analysis PARAMS ((void));
cdadb1dd 2006extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
4c649323 2007
0a1c58a2
JL		 2008/* In sibcall.c */
2009typedef enum {
2010 sibcall_use_normal = 1,
2011 sibcall_use_tail_recursion,
2012 sibcall_use_sibcall
2013} sibcall_use_t;
2014
2015extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2016extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2017
21b2cd73 2018#ifdef STACK_REGS
cdadb1dd 2019extern int stack_regs_mentioned PARAMS ((rtx insn));
21b2cd73
JH		 2020#endif
2021
a157febd 2022/* In toplev.c */
a157febd 2023extern rtx stack_limit_rtx;
dfdb644f 2024
7b82b5da 2025/* In regrename.c */
7b82b5da
SC		 2026extern void regrename_optimize PARAMS ((void));
2027
4db384c9 2028/* In ifcvt.c */
2ea64f10
RH		 2029extern void if_convert PARAMS ((int));
2030
4db384c9
JH		 2031/* In predict.c */
2032extern void invert_br_probabilities PARAMS ((rtx));
88657302 2033#endif /* ! GCC_RTL_H */
GNU Compiler Collection
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