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g++.exp (g++_exit, [...]): Removed.
[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,
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)
1f3b37a3 323#define XTMPL(RTX, N) (RTL_CHECK1(RTX, N, 'T').rtstr)
ef178af3
ZW		 324
325#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
326#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
327
328/* These are like XWINT, etc. except that they expect a '0' field instead
329 of the normal type code. */
330
331#define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
332#define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
08394eef 333#define X0UINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtuint)
ef178af3
ZW		 334#define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
335#define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
336#define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
337#define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
338#define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
339#define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
340#define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
341#define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
eab5c70a 342#define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
0dfa1860 343
83ab3839
RH		 344#define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
345#define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
770ae6cc 346#define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
83ab3839
RH		 347#define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
348#define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
349#define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
350#define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
351#define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
352#define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
353#define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
354#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
eab5c70a 355#define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
83ab3839
RH		 356
357#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
358#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
359
360#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
6f29feb1
JW		 361\f
362/* ACCESS MACROS for particular fields of insns. */
363
4e872036
AS		 364/* Determines whether X is an insn. */
365#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
366
6f29feb1
JW		 367/* Holds a unique number for each insn.
368 These are not necessarily sequentially increasing. */
8f985ec4 369#define INSN_UID(INSN) XINT(INSN, 0)
6f29feb1
JW		 370
371/* Chain insns together in sequence. */
8f985ec4
ZW		 372#define PREV_INSN(INSN) XEXP(INSN, 1)
373#define NEXT_INSN(INSN) XEXP(INSN, 2)
6f29feb1
JW		 374
375/* The body of an insn. */
8f985ec4 376#define PATTERN(INSN) XEXP(INSN, 3)
6f29feb1
JW		 377
378/* Code number of instruction, from when it was recognized.
379 -1 means this instruction has not been recognized yet. */
8f985ec4 380#define INSN_CODE(INSN) XINT(INSN, 4)
6f29feb1
JW		 381
382/* Set up in flow.c; empty before then.
383 Holds a chain of INSN_LIST rtx's whose first operands point at
384 previous insns with direct data-flow connections to this one.
385 That means that those insns set variables whose next use is in this insn.
386 They are always in the same basic block as this insn. */
8f985ec4 387#define LOG_LINKS(INSN) XEXP(INSN, 5)
6f29feb1
JW		 388
389/* 1 if insn has been deleted. */
390#define INSN_DELETED_P(INSN) ((INSN)->volatil)
391
392/* 1 if insn is a call to a const function. */
393#define CONST_CALL_P(INSN) ((INSN)->unchanging)
394
0a1c58a2
JL		 395/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
396#define SIBLING_CALL_P(INSN) ((INSN)->jump)
397
6f29feb1
JW		 398/* 1 if insn is a branch that should not unconditionally execute its
399 delay slots, i.e., it is an annulled branch. */
400#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
401
b53978a3
JO		 402/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
403#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
404
6f29feb1 405/* 1 if insn is in a delay slot and is from the target of the branch. If
6dc42e49 406 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
6f29feb1
JW		 407 executed if the branch is taken. For annulled branches with this bit
408 clear, the insn should be executed only if the branch is not taken. */
409#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
410
f590cca1
RH		 411#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
412
413#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
414
6f29feb1 415/* Holds a list of notes on what this insn does to various REGs.
f590cca1
RH		 416 It is a chain of EXPR_LIST rtx's, where the second operand is the
417 chain pointer and the first operand is the REG being described.
6f29feb1 418 The mode field of the EXPR_LIST contains not a real machine mode
f590cca1 419 but a value from enum reg_note. */
6f29feb1 420
8f985ec4 421#define REG_NOTES(INSN) XEXP(INSN, 6)
6f29feb1
JW		 422
423/* Don't forget to change reg_note_name in rtl.c. */
f590cca1
RH		 424enum reg_note
425{
426 /* The value in REG dies in this insn (i.e., it is not needed past
427 this insn). If REG is set in this insn, the REG_DEAD note may,
428 but need not, be omitted. */
429 REG_DEAD = 1,
430
431 /* The REG is autoincremented or autodecremented. */
432 REG_INC,
433
434 /* Describes the insn as a whole; it says that the insn sets a register
435 to a constant value or to be equivalent to a memory address. If the
436 register is spilled to the stack then the constant value should be
437 substituted for it. The contents of the REG_EQUIV is the constant
438 value or memory address, which may be different from the source of
439 the SET although it has the same value. A REG_EQUIV note may also
440 appear on an insn which copies a register parameter to a pseudo-register,
441 if there is a memory address which could be used to hold that
442 pseudo-register throughout the function. */
be1bb652 443 REG_EQUIV,
f590cca1
RH		 444
445 /* Like REG_EQUIV except that the destination is only momentarily equal
446 to the specified rtx. Therefore, it cannot be used for substitution;
447 but it can be used for cse. */
448 REG_EQUAL,
449
450 /* The register set in this insn held 0 before the insn. The contents of
451 the note is the insn that stored the 0. If that insn is deleted or
452 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
453 is actually an INSN_LIST, not an EXPR_LIST. */
454 REG_WAS_0,
455
456 /* This insn copies the return-value of a library call out of the hard reg
457 for return values. This note is actually an INSN_LIST and it points to
458 the first insn involved in setting up arguments for the call. flow.c
459 uses this to delete the entire library call when its result is dead. */
460 REG_RETVAL,
461
462 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
be1bb652
RH		 463 and points at the one that has the REG_RETVAL. This note is also an
464 INSN_LIST. */
f590cca1
RH		 465 REG_LIBCALL,
466
467 /* The register is always nonnegative during the containing loop. This is
468 used in branches so that decrement and branch instructions terminating
469 on zero can be matched. There must be an insn pattern in the md file
470 named `decrement_and_branch_until_zero' or else this will never be added
471 to any instructions. */
472 REG_NONNEG,
473
474 /* There is no conflict *after this insn* between the register in the note
475 and the destination of this insn. */
476 REG_NO_CONFLICT,
477
478 /* Identifies a register set in this insn and never used. */
479 REG_UNUSED,
480
481 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
482 respectively. Normally, these are required to be consecutive insns, but
483 we permit putting a cc0-setting insn in the delay slot of a branch as
484 long as only one copy of the insn exists. In that case, these notes
485 point from one to the other to allow code generation to determine what
be1bb652
RH		 486 any require information and to properly update CC_STATUS. These notes
487 are INSN_LISTs. */
f590cca1
RH		 488 REG_CC_SETTER, REG_CC_USER,
489
490 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
be1bb652
RH		 491 CODE_LABEL contained in the REG_LABEL note is used by the insn.
492 This note is an INSN_LIST. */
f590cca1
RH		 493 REG_LABEL,
494
495 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
496 write-after-read and write-after-write dependencies respectively.
497 Data dependencies, which are the only type of LOG_LINK created by
498 flow, are represented by a 0 reg note kind. */
499 REG_DEP_ANTI, REG_DEP_OUTPUT,
500
4db384c9
JH		 501 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
502 It has an integer value. For jumps, it is the probability that this is a
503 taken branch. For calls, it is the probability that this call won't
504 return. */
f590cca1
RH		 505 REG_BR_PROB,
506
507 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
508 the first insn after each CALL_INSN. It indicates how many times this
509 block was executed. */
510 REG_EXEC_COUNT,
511
512 /* Attached to a call insn; indicates that the call is malloc-like and
513 that the pointer returned cannot alias anything else. */
514 REG_NOALIAS,
515
516 /* Used to optimize rtl generated by dynamic stack allocations for targets
517 where SETJMP_VIA_SAVE_AREA is true. */
518 REG_SAVE_AREA,
519
4db384c9
JH		 520 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
521 CONCAT of two integer value. First specifies the branch predictor
522 that added the note, second specifies the predicted hitrate of branch
523 in the same format as REG_BR_PROB note uses. */
f590cca1
RH		 524 REG_BR_PRED,
525
526 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
527 for DWARF to interpret what they imply. The attached rtx is used
528 instead of intuition. */
529 REG_FRAME_RELATED_EXPR,
530
531 /* Indicates that REG holds the exception context for the function.
532 This context is shared by inline functions, so the code to acquire
533 the real exception context is delayed until after inlining. */
534 REG_EH_CONTEXT,
535
536 /* Indicates what exception region an INSN belongs in. This is used to
537 indicate what region to which a call may throw. REGION 0 indicates
538 that a call cannot throw at all. REGION -1 indicates that it cannot
539 throw, nor will it execute a non-local goto. */
540 REG_EH_REGION,
541
542 /* Indicates that a call is actually a call to rethrow, and specifies the
543 rethrow symbol for the region the rethrow is targetting. This provides
544 a way to generate the non standard flow edges required for a rethrow. */
545 REG_EH_RETHROW,
546
547 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
8cd8f856
GK		 548 REG_SAVE_NOTE,
549
550 /* Indicates that this insn (which is part of the prologue) computes
551 a value which might not be used later, and if so it's OK to delete
552 the insn. Normally, deleting any insn in the prologue is an error.
553 At present the parameter is unused and set to (const_int 0). */
ca3920ad
JW		 554 REG_MAYBE_DEAD,
555
556 /* Indicates that a call does not return. */
4b01bd16
RH		 557 REG_NORETURN,
558
559 /* Indicates that an indirect jump is a non-local goto instead of a
560 computed goto. */
561 REG_NON_LOCAL_GOTO
f590cca1
RH		 562};
563
7ae21caf
DE		 564/* The base value for branch probability notes. */
565#define REG_BR_PROB_BASE 10000
6f29feb1
JW		 566
567/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
568#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
569#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
570
571/* Names for REG_NOTE's in EXPR_LIST insn's. */
572
1f9a015e 573extern const char * const reg_note_name[];
0f41302f 574#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
6f29feb1 575
e51c6661
RK		 576/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
577 USE and CLOBBER expressions.
578 USE expressions list the registers filled with arguments that
579 are passed to the function.
580 CLOBBER expressions document the registers explicitly clobbered
581 by this CALL_INSN.
582 Pseudo registers can not be mentioned in this list. */
8f985ec4 583#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
e51c6661 584
6f29feb1
JW		 585/* The label-number of a code-label. The assembler label
586 is made from `L' and the label-number printed in decimal.
587 Label numbers are unique in a compilation. */
be1bb652 588#define CODE_LABEL_NUMBER(INSN) XINT(INSN, 5)
6f29feb1
JW		 589
590#define LINE_NUMBER NOTE
591
0dfa1860
MM		 592/* In a NOTE that is a line number, this is a string for the file name that the
593 line is in. We use the same field to record block numbers temporarily in
594 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
595 between ints and pointers if we use a different macro for the block number.)
596 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
597 information as a rtx in the field. */
6f29feb1 598
83ab3839 599#define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
1a4450c7 600#define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
83ab3839
RH		 601#define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
602#define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
603#define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
604#define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
994a57cd 605#define NOTE_EXPECTED_VALUE(INSN) XCEXP(INSN, 3, NOTE)
0dfa1860 606
6f29feb1
JW		 607/* In a NOTE that is a line number, this is the line number.
608 Other kinds of NOTEs are identified by negative numbers here. */
83ab3839 609#define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
6f29feb1 610
589ca5cb
MM		 611/* Nonzero if INSN is a note marking the beginning of a basic block. */
612#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
613 (GET_CODE (INSN) == NOTE \
614 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
615
6f29feb1 616/* Codes that appear in the NOTE_LINE_NUMBER field
a31efb86 617 for kinds of notes that are not line numbers.
6f29feb1 618
a31efb86
DE		 619 Notice that we do not try to use zero here for any of
620 the special note codes because sometimes the source line
621 actually can be zero! This happens (for example) when we
622 are generating code for the per-translation-unit constructor
623 and destructor routines for some C++ translation unit.
624
625 If you should change any of the following values, or if you
626 should add a new value here, don't forget to change the
627 note_insn_name array in rtl.c. */
6f29feb1 628
d636c18c
RH		 629enum insn_note
630{
631 /* Keep all of these numbers negative. Adjust as needed. */
632 NOTE_INSN_BIAS = -100,
633
634 /* This note is used to get rid of an insn
635 when it isn't safe to patch the insn out of the chain. */
636 NOTE_INSN_DELETED,
637
638 /* These are used to mark the beginning and end of a lexical block.
639 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
640 NOTE_INSN_BLOCK_BEG,
641 NOTE_INSN_BLOCK_END,
642
643 /* These mark the extremes of a loop. */
644 NOTE_INSN_LOOP_BEG,
645 NOTE_INSN_LOOP_END,
646
647 /* Generated at the place in a loop that `continue' jumps to. */
648 NOTE_INSN_LOOP_CONT,
649 /* Generated at the start of a duplicated exit test. */
650 NOTE_INSN_LOOP_VTOP,
651
652 /* This kind of note is generated at the end of the function body,
653 just before the return insn or return label. In an optimizing
654 compilation it is deleted by the first jump optimization, after
655 enabling that optimizer to determine whether control can fall
656 off the end of the function body without a return statement. */
657 NOTE_INSN_FUNCTION_END,
658
659 /* This kind of note is generated just after each call to `setjmp',
660 and similar functions that can return twice. */
661 NOTE_INSN_SETJMP,
662
663 /* This marks the point immediately after the last prologue insn. */
664 NOTE_INSN_PROLOGUE_END,
665
666 /* This marks the point immediately prior to the first epilogue insn. */
667 NOTE_INSN_EPILOGUE_BEG,
668
669 /* Generated in place of user-declared labels when they are deleted. */
670 NOTE_INSN_DELETED_LABEL,
671
672 /* This note indicates the start of the real body of the function,
673 i.e. the point just after all of the parms have been moved into
674 their homes, etc. */
675 NOTE_INSN_FUNCTION_BEG,
676
677 /* These note where exception handling regions begin and end.
678 Uses NOTE_EH_HANDLER to identify the region in question. */
679 NOTE_INSN_EH_REGION_BEG,
680 NOTE_INSN_EH_REGION_END,
681
682 /* Generated whenever a duplicate line number note is output. For example,
683 one is output after the end of an inline function, in order to prevent
684 the line containing the inline call from being counted twice in gcov. */
b3b42a4d 685 NOTE_INSN_REPEATED_LINE_NUMBER,
d636c18c
RH		 686
687 /* Start/end of a live range region, where pseudos allocated on the stack
688 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
b3b42a4d 689 NOTE_INSN_RANGE_BEG,
d636c18c
RH		 690 NOTE_INSN_RANGE_END,
691
692 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
693 NOTE_INSN_LIVE,
694
695 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
696 NOTE_INSN_BASIC_BLOCK,
697
994a57cd
RH		 698 /* Record the expected value of a register at a location. Uses
699 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
700 NOTE_INSN_EXPECTED_VALUE,
701
d636c18c
RH		 702 NOTE_INSN_MAX
703};
10f07067 704
6f29feb1
JW		 705/* Names for NOTE insn's other than line numbers. */
706
d636c18c
RH		 707extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
708#define GET_NOTE_INSN_NAME(NOTE_CODE) \
dbbbbf3b 709 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
6f29feb1
JW		 710
711/* The name of a label, in case it corresponds to an explicit label
712 in the input source code. */
be1bb652 713#define LABEL_NAME(RTX) XCSTR(RTX, 6, CODE_LABEL)
6f29feb1
JW		 714
715/* In jump.c, each label contains a count of the number
716 of LABEL_REFs that point at it, so unused labels can be deleted. */
be1bb652 717#define LABEL_NUSES(RTX) XCINT(RTX, 3, CODE_LABEL)
6f29feb1 718
8cd0faaf
CM		 719/* Associate a name with a CODE_LABEL. */
720#define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
721
e9a25f70 722/* The original regno this ADDRESSOF was built for. */
770ae6cc 723#define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
e9a25f70
JL		 724
725/* The variable in the register we took the address of. */
83ab3839 726#define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
e9a25f70 727
6f29feb1
JW		 728/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
729 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
730 be decremented and possibly the label can be deleted. */
83ab3839 731#define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
6f29feb1
JW		 732
733/* Once basic blocks are found in flow.c,
734 each CODE_LABEL starts a chain that goes through
735 all the LABEL_REFs that jump to that label.
be1bb652
RH		 736 The chain eventually winds up at the CODE_LABEL: it is circular. */
737#define LABEL_REFS(LABEL) XCEXP(LABEL, 4, CODE_LABEL)
6f29feb1
JW		 738\f
739/* This is the field in the LABEL_REF through which the circular chain
740 of references to a particular label is linked.
741 This chain is set up in flow.c. */
742
83ab3839 743#define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
6f29feb1
JW		 744
745/* Once basic blocks are found in flow.c,
746 Each LABEL_REF points to its containing instruction with this field. */
747
83ab3839 748#define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
6f29feb1 749
08394eef
BS		 750/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
751 the number the register originally had; for a pseudo register turned into
752 a hard reg this will hold the old pseudo register number. */
6f29feb1 753
770ae6cc 754#define REGNO(RTX) XCUINT(RTX, 0, REG)
08394eef 755#define ORIGINAL_REGNO(RTX) X0UINT(RTX, 1)
6f29feb1
JW		 756
757/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
758 is the current function's return value. */
759
760#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
761
762/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
763#define REG_USERVAR_P(RTX) ((RTX)->volatil)
764
3502dc9c
JDA		 765/* 1 in a REG rtx if the register is a pointer. */
766#define REG_POINTER(RTX) ((RTX)->frame_related)
767
cdbca172
JO		 768/* 1 if the given register REG corresponds to a hard register. */
769#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
770
771/* 1 if the given register number REG_NO corresponds to a hard register. */
772#define HARD_REGISTER_NUM_P(REG_NO) (REG_NO < FIRST_PSEUDO_REGISTER)
773
6f29feb1
JW		 774/* For a CONST_INT rtx, INTVAL extracts the integer. */
775
83ab3839 776#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
6f29feb1 777
a36556a8
ZW		 778/* For a CONST_DOUBLE:
779 The usual two ints that hold the value.
780 For a DImode, that is all there are;
781 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
782 For a float, the number of ints varies,
783 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
784 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
785#define CONST_DOUBLE_LOW(r) XCWINT (r, 2, CONST_DOUBLE)
786#define CONST_DOUBLE_HIGH(r) XCWINT (r, 3, CONST_DOUBLE)
787
788/* Link for chain of all CONST_DOUBLEs in use in current function. */
789#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 1, CONST_DOUBLE)
790/* The MEM which represents this CONST_DOUBLE's value in memory,
791 or const0_rtx if no MEM has been made for it yet,
792 or cc0_rtx if it is not on the chain. */
793#define CONST_DOUBLE_MEM(r) XCEXP (r, 0, CONST_DOUBLE)
794
6f29feb1 795/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
ddef6bc7 796 SUBREG_BYTE extracts the byte-number. */
6f29feb1 797
83ab3839 798#define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
ddef6bc7
JJ		 799#define SUBREG_BYTE(RTX) XCUINT(RTX, 1, SUBREG)
800
801/* in rtlanal.c */
802extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
803 enum machine_mode,
804 unsigned int,
805 enum machine_mode));
806extern unsigned int subreg_regno PARAMS ((rtx));
6f29feb1 807
07be3989
RK		 808/* 1 if the REG contained in SUBREG_REG is already known to be
809 sign- or zero-extended from the mode of the SUBREG to the mode of
810 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
f590cca1 811 extension.
07be3989
RK		 812
813 When used as a LHS, is means that this extension must be done
814 when assigning to SUBREG_REG. */
815
816#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
817#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
818
6f29feb1
JW		 819/* Access various components of an ASM_OPERANDS rtx. */
820
83ab3839
RH		 821#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
822#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
823#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
824#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
825#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
826#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
827#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
6462bb43
AO		 828#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
829 XCVECEXP ((RTX), 4, (N), ASM_OPERANDS)
3bdf5ad1
RK		 830#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
831 XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
832#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
833 GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
83ab3839
RH		 834#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
835#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
6f29feb1
JW		 836
837/* For a MEM rtx, 1 if it's a volatile reference.
838 Also in an ASM_OPERANDS rtx. */
839#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
840
3bdf5ad1
RK		 841/* For a MEM rtx, 1 if it refers to an aggregate, either to the
842 aggregate itself of to a field of the aggregate. If zero, RTX may
4eb00163 843 or may not be such a reference. */
6f29feb1
JW		 844#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
845
c6df88cb
MM		 846/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
847 not refer to a scalar.*/
848#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
849
c6df88cb
MM		 850/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
851 RTX. Otherwise, vice versa. Use this macro only when you are
852 *sure* that you know that the MEM is in a structure, or is a
853 scalar. VAL is evaluated only once. */
f9e158c3
JM		 854#define MEM_SET_IN_STRUCT_P(RTX, VAL) do { \
855 if (VAL) \
856 { \
857 MEM_IN_STRUCT_P (RTX) = 1; \
858 MEM_SCALAR_P (RTX) = 0; \
859 } \
860 else \
861 { \
862 MEM_IN_STRUCT_P (RTX) = 0; \
863 MEM_SCALAR_P (RTX) = 1; \
864 } \
865} while (0)
c6df88cb 866
41472af8
MM		 867/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
868 set, and may alias anything. Otherwise, the MEM can only alias
869 MEMs in the same alias set. This value is set in a
870 language-dependent manner in the front-end, and should not be
871 altered in the back-end. These set numbers are tested for zero,
872 and compared for equality; they have no other significance. In
873 some front-ends, these numbers may correspond in some way to types,
874 or other language-level entities, but they need not, and the
875 back-end makes no such assumptions. */
3bdf5ad1
RK		 876#define MEM_ALIAS_SET(RTX) XCWINT(RTX, 1, MEM)
877
878/* Copy the attributes that apply to memory locations from RHS to LHS. */
879#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
880 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
881 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
882 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
883 MEM_ALIAS_SET (LHS) = MEM_ALIAS_SET (RHS), \
884 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS))
41472af8 885
6f29feb1
JW		 886/* For a LABEL_REF, 1 means that this reference is to a label outside the
887 loop containing the reference. */
888#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
889
adfaf10a 890/* For a LABEL_REF, 1 means it is for a nonlocal label. */
2a406d2a 891/* Likewise in an EXPR_LIST for a REG_LABEL note. */
adfaf10a
RS		 892#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
893
6f29feb1
JW		 894/* For a CODE_LABEL, 1 means always consider this label to be needed. */
895#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
896
897/* For a REG, 1 means the register is used only in an exit test of a loop. */
898#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
899
900/* During sched, for an insn, 1 means that the insn must be scheduled together
d45cf215 901 with the preceding insn. */
6f29feb1
JW		 902#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
903
c376c05b
TW		 904/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
905 cost of the dependence link. The cost of executing an instruction
906 may vary based on how the results are used. LINK_COST_ZERO is 1 when
907 the cost through the link varies and is unchanged (i.e., the link has
908 zero additional cost). LINK_COST_FREE is 1 when the cost through the
909 link is zero (i.e., the link makes the cost free). In other cases,
910 the adjustment to the cost is recomputed each time it is needed. */
911#define LINK_COST_ZERO(X) ((X)->jump)
912#define LINK_COST_FREE(X) ((X)->call)
913
6f29feb1
JW		 914/* For a SET rtx, SET_DEST is the place that is set
915 and SET_SRC is the value it is set to. */
83ab3839
RH		 916#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
917#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
6f29feb1
JW		 918
919/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
83ab3839
RH		 920#define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
921#define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
6f29feb1 922
0c99ec5c
RH		 923/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
924 conditionally executing the code on, COND_EXEC_CODE is the code
925 to execute if the condition is true. */
926#define COND_EXEC_TEST(RTX) XCEXP(RTX, 0, COND_EXEC)
927#define COND_EXEC_CODE(RTX) XCEXP(RTX, 1, COND_EXEC)
928
6f29feb1
JW		 929/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
930#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
931
bd7cf17e
JJ		 932/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
933#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
934
6f29feb1
JW		 935/* Flag in a SYMBOL_REF for machine-specific purposes. */
936#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
937
938/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
939#define SYMBOL_REF_USED(RTX) ((RTX)->used)
940
ff0b6b99
FS		 941/* 1 means a SYMBOL_REF is weak. */
942#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
943
6f29feb1
JW		 944/* Define a macro to look for REG_INC notes,
945 but save time on machines where they never exist. */
946
58e54c44
RS		 947/* Don't continue this line--convex cc version 4.1 would lose. */
948#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 949#define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
950#else
951#define FIND_REG_INC_NOTE(insn, reg) 0
952#endif
953
954/* Indicate whether the machine has any sort of auto increment addressing.
955 If not, we can avoid checking for REG_INC notes. */
956
58e54c44
RS		 957/* Don't continue this line--convex cc version 4.1 would lose. */
958#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 959#define AUTO_INC_DEC
960#endif
0dfa1860 961
940da324
JL		 962#ifndef HAVE_PRE_INCREMENT
963#define HAVE_PRE_INCREMENT 0
964#endif
965
966#ifndef HAVE_PRE_DECREMENT
967#define HAVE_PRE_DECREMENT 0
968#endif
969
970#ifndef HAVE_POST_INCREMENT
971#define HAVE_POST_INCREMENT 0
972#endif
973
974#ifndef HAVE_POST_DECREMENT
975#define HAVE_POST_DECREMENT 0
976#endif
977
4b983fdc
RH		 978#ifndef HAVE_POST_MODIFY_DISP
979#define HAVE_POST_MODIFY_DISP 0
980#endif
981
982#ifndef HAVE_POST_MODIFY_REG
983#define HAVE_POST_MODIFY_REG 0
984#endif
985
986#ifndef HAVE_PRE_MODIFY_DISP
987#define HAVE_PRE_MODIFY_DISP 0
988#endif
989
990#ifndef HAVE_PRE_MODIFY_REG
991#define HAVE_PRE_MODIFY_REG 0
992#endif
993
6e01bd94
MH		 994
995/* Some architectures do not have complete pre/post increment/decrement
996 instruction sets, or only move some modes efficiently. These macros
997 allow us to tune autoincrement generation. */
998
999#ifndef USE_LOAD_POST_INCREMENT
1000#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1001#endif
1002
1003#ifndef USE_LOAD_POST_DECREMENT
1004#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1005#endif
1006
1007#ifndef USE_LOAD_PRE_INCREMENT
1008#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1009#endif
1010
1011#ifndef USE_LOAD_PRE_DECREMENT
1012#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1013#endif
1014
1015#ifndef USE_STORE_POST_INCREMENT
1016#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1017#endif
1018
1019#ifndef USE_STORE_POST_DECREMENT
1020#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1021#endif
1022
1023#ifndef USE_STORE_PRE_INCREMENT
1024#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1025#endif
1026
1027#ifndef USE_STORE_PRE_DECREMENT
1028#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1029#endif
1030
1031
0dfa1860
MM		 1032/* Accessors for RANGE_INFO. */
1033/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1034#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
0dfa1860
MM		 1035
1036/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1037#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
0dfa1860
MM		 1038
1039/* For RANGE_{START,END} notes, return the vector containing the registers used
1040 in the range. */
83ab3839
RH		 1041#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1042#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1043#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
0dfa1860
MM		 1044
1045/* For RANGE_{START,END} notes, the number of calls within the range. */
83ab3839 1046#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
0dfa1860
MM		 1047
1048/* For RANGE_{START,END} notes, the number of insns within the range. */
83ab3839 1049#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
0dfa1860
MM		 1050
1051/* For RANGE_{START,END} notes, a unique # to identify this range. */
83ab3839 1052#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
0dfa1860
MM		 1053
1054/* For RANGE_{START,END} notes, the basic block # the range starts with. */
83ab3839 1055#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
0dfa1860
MM		 1056
1057/* For RANGE_{START,END} notes, the basic block # the range ends with. */
83ab3839 1058#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
0dfa1860
MM		 1059
1060/* For RANGE_{START,END} notes, the loop depth the range is in. */
83ab3839 1061#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
0dfa1860
MM		 1062
1063/* For RANGE_{START,END} notes, the bitmap of live registers at the start
1064 of the range. */
83ab3839 1065#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
0dfa1860
MM		 1066
1067/* For RANGE_{START,END} notes, the bitmap of live registers at the end
1068 of the range. */
83ab3839 1069#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
0dfa1860
MM		 1070
1071/* For RANGE_START notes, the marker # of the start of the range. */
83ab3839 1072#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
0dfa1860
MM		 1073
1074/* For RANGE_START notes, the marker # of the end of the range. */
83ab3839 1075#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
0dfa1860
MM		 1076
1077/* Original pseudo register # for a live range note. */
83ab3839 1078#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
0dfa1860
MM		 1079
1080/* Pseudo register # original register is copied into or -1. */
83ab3839 1081#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
0dfa1860
MM		 1082
1083/* How many times a register in a live range note was referenced. */
83ab3839 1084#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
0dfa1860
MM		 1085
1086/* How many times a register in a live range note was set. */
83ab3839 1087#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
0dfa1860
MM		 1088
1089/* How many times a register in a live range note died. */
83ab3839 1090#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
0dfa1860
MM		 1091
1092/* Whether the original value is needed to be copied into the range register at
1093 the start of the range. */
83ab3839 1094#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
0dfa1860
MM		 1095
1096/* # of insns the register copy is live over. */
83ab3839 1097#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
0dfa1860
MM		 1098
1099/* # of calls the register copy is live over. */
83ab3839 1100#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
0dfa1860
MM		 1101
1102/* DECL_NODE pointer of the declaration if the register is a user defined
1103 variable. */
83ab3839 1104#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
0dfa1860
MM		 1105
1106/* BLOCK_NODE pointer to the block the variable is declared in if the
1107 register is a user defined variable. */
83ab3839 1108#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
0dfa1860
MM		 1109
1110/* EXPR_LIST of the distinct ranges a variable is in. */
1111#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1112
1113/* Block a variable is declared in. */
1114#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1115
1116/* # of distinct ranges a variable is in. */
1117#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1118
1119/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1120#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1121
1122/* For a NOTE_INSN_LIVE note, the original basic block number. */
1123#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
4e872036
AS		 1124
1125/* Determine if the insn is a PHI node. */
1126#define PHI_NODE_P(X) \
1127 (X && GET_CODE (X) == INSN \
1128 && GET_CODE (PATTERN (X)) == SET \
1129 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
6f29feb1 1130\f
bf6bb899
BS		 1131/* Nonzero if we need to distinguish between the return value of this function
1132 and the return value of a function called by this function. This helps
1133 integrate.c.
1134 This is 1 until after the rtl generation pass. */
1135extern int rtx_equal_function_value_matters;
1136
1b3d8f8a
GK		 1137/* Nonzero when we are generating CONCATs. */
1138extern int generating_concat_p;
1139
6f29feb1
JW		 1140/* Generally useful functions. */
1141
ac957f13 1142/* In expmed.c */
cdadb1dd 1143extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
5f4f0e22
CH		 1144
1145#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1146
5f2d6cfa
MM		 1147/* In builtins.c */
1148extern rtx expand_builtin_expect_jump PARAMS ((union tree_node *, rtx, rtx));
1149
50b2596f 1150/* In explow.c */
c6991660 1151extern void set_stack_check_libfunc PARAMS ((rtx));
cdadb1dd 1152extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
7e4ce834 1153 enum machine_mode));
cdadb1dd
KG		 1154extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1155extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1156extern void optimize_save_area_alloca PARAMS ((rtx));
5f4f0e22 1157
4eb00163 1158/* In emit-rtl.c */
cdadb1dd 1159extern rtx gen_rtx PARAMS ((enum rtx_code,
bdea67fa 1160 enum machine_mode, ...));
cdadb1dd
KG		 1161extern rtvec gen_rtvec PARAMS ((int, ...));
1162
4eb00163 1163/* In other files */
cdadb1dd
KG		 1164extern rtx rtx_alloc PARAMS ((RTX_CODE));
1165extern rtvec rtvec_alloc PARAMS ((int));
1166extern rtx copy_insn_1 PARAMS ((rtx));
1167extern rtx copy_insn PARAMS ((rtx));
4eb00163
JO		 1168
1169/* In rtl.c */
cdadb1dd 1170extern rtx copy_rtx PARAMS ((rtx));
4eb00163
JO		 1171
1172/* In emit-rtl.c */
cdadb1dd 1173extern rtx copy_rtx_if_shared PARAMS ((rtx));
4eb00163
JO		 1174
1175/* In rtl.c */
cdadb1dd
KG		 1176extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1177extern rtx shallow_copy_rtx PARAMS ((rtx));
1178extern int rtx_equal_p PARAMS ((rtx, rtx));
4eb00163
JO		 1179
1180/* In emit-rtl.c */
cdadb1dd
KG		 1181extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1182extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1183extern rtx gen_label_rtx PARAMS ((void));
ddef6bc7 1184extern int subreg_hard_regno PARAMS ((rtx, int));
cdadb1dd
KG		 1185extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1186extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1187
1188/* In cse.c */
cdadb1dd 1189extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1190
1191/* In emit-rtl.c */
cdadb1dd 1192extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
5222e470
JH		 1193extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1194 enum machine_mode, rtx));
cdadb1dd
KG		 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));
1e5fd094 1288extern void mark_jump_label PARAMS ((rtx, rtx, int));
01f62f01 1289extern void cleanup_barriers PARAMS ((void));
4eb00163 1290
4eb00163 1291/* In jump.c */
cdadb1dd
KG		 1292extern rtx squeeze_notes PARAMS ((rtx, rtx));
1293extern rtx delete_insn PARAMS ((rtx));
1294extern void delete_jump PARAMS ((rtx));
1295extern void delete_barrier PARAMS ((rtx));
1296extern rtx get_label_before PARAMS ((rtx));
1297extern rtx get_label_after PARAMS ((rtx));
1298extern rtx follow_jumps PARAMS ((rtx));
4eb00163
JO		 1299
1300/* In recog.c */
b72f00af 1301extern rtx *find_constant_term_loc PARAMS ((rtx *));
4eb00163
JO		 1302
1303/* In emit-rtl.c */
cdadb1dd 1304extern rtx try_split PARAMS ((rtx, rtx, int));
6b24c259 1305extern int split_branch_probability;
4eb00163
JO		 1306
1307/* In unknown file */
cdadb1dd 1308extern rtx split_insns PARAMS ((rtx, rtx));
4eb00163
JO		 1309
1310/* In simplify-rtx.c */
d9c695ff
RK		 1311extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1312 enum machine_mode, rtx,
1313 enum machine_mode));
1314extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1315 enum machine_mode, rtx,
1316 rtx));
1317extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1318 enum machine_mode,
1319 enum machine_mode, rtx, rtx,
1320 rtx));
1321extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1322 enum machine_mode, rtx,
1323 rtx));
1324extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1325 enum machine_mode,
1326 rtx, rtx));
1327extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1328 enum machine_mode, rtx,
1329 enum machine_mode));
1330extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1331 enum machine_mode,
1332 enum machine_mode,
1333 rtx, rtx, rtx));
1334extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
141e454b 1335 enum machine_mode,
d9c695ff
RK		 1336 enum machine_mode,
1337 rtx, rtx));
eea50aa0
JH		 1338extern rtx simplify_subreg PARAMS ((enum machine_mode,
1339 rtx,
1340 enum machine_mode,
1341 unsigned int));
949c5d62
JH		 1342extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1343 rtx,
1344 enum machine_mode,
1345 unsigned int));
d9c695ff 1346extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
cdadb1dd 1347extern rtx simplify_rtx PARAMS ((rtx));
4eb00163 1348
4eb00163 1349/* In function.c */
cdadb1dd 1350extern rtx gen_mem_addressof PARAMS ((rtx, union tree_node *));
4eb00163 1351
4eb00163 1352/* In regclass.c */
770ae6cc
RK		 1353extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1354 unsigned int));
4eb00163
JO		 1355
1356/* In emit-rtl.c */
cdadb1dd 1357extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
9ae8ffe7 1358
e9a25f70
JL		 1359/* Functions in rtlanal.c */
1360
b1cdafbb
JH		 1361/* Single set is implemented as macro for performance reasons. */
1362#define single_set(I) (INSN_P (I) \
1363 ? (GET_CODE (PATTERN (I)) == SET \
1364 ? PATTERN (I) : single_set_1 (I)) \
1365 : NULL_RTX)
2130b7fb 1366#define single_set_1(I) single_set_2 (I, PATTERN (I))
b1cdafbb 1367
e38fe8e0 1368extern int rtx_addr_can_trap_p PARAMS ((rtx));
cdadb1dd 1369extern int rtx_unstable_p PARAMS ((rtx));
e38fe8e0
BS		 1370extern int rtx_varies_p PARAMS ((rtx, int));
1371extern int rtx_addr_varies_p PARAMS ((rtx, int));
cdadb1dd
KG		 1372extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1373extern rtx get_related_value PARAMS ((rtx));
1374extern int reg_mentioned_p PARAMS ((rtx, rtx));
4b983fdc 1375extern int count_occurrences PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1376extern int reg_referenced_p PARAMS ((rtx, rtx));
1377extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1378extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1379extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1380extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
e5c56fd9 1381extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1382extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1383extern int no_labels_between_p PARAMS ((rtx, rtx));
1384extern int no_jumps_between_p PARAMS ((rtx, rtx));
1385extern int modified_in_p PARAMS ((rtx, rtx));
4eb00163 1386extern int insn_dependent_p PARAMS ((rtx, rtx));
cdadb1dd 1387extern int reg_set_p PARAMS ((rtx, rtx));
2130b7fb 1388extern rtx single_set_2 PARAMS ((rtx, rtx));
cdadb1dd 1389extern int multiple_sets PARAMS ((rtx));
7142e318 1390extern int set_noop_p PARAMS ((rtx));
0005550b 1391extern int noop_move_p PARAMS ((rtx));
cdadb1dd 1392extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
770ae6cc
RK		 1393extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1394 rtx, rtx *));
cdadb1dd 1395extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
91b2d119 1396extern rtx set_of PARAMS ((rtx, rtx));
770ae6cc
RK		 1397extern void note_stores PARAMS ((rtx,
1398 void (*) (rtx, rtx, void *),
1399 void *));
e2373f95
RK		 1400extern void note_uses PARAMS ((rtx *,
1401 void (*) (rtx *, void *),
1402 void *));
cdadb1dd
KG		 1403extern rtx reg_set_last PARAMS ((rtx, rtx));
1404extern int dead_or_set_p PARAMS ((rtx, rtx));
770ae6cc 1405extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
cdadb1dd 1406extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
770ae6cc
RK		 1407extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1408 unsigned int));
d9c695ff 1409extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
cdadb1dd 1410extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
770ae6cc
RK		 1411extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1412 unsigned int));
cdadb1dd
KG		 1413extern void remove_note PARAMS ((rtx, rtx));
1414extern int side_effects_p PARAMS ((rtx));
1415extern int volatile_refs_p PARAMS ((rtx));
1416extern int volatile_insn_p PARAMS ((rtx));
1417extern int may_trap_p PARAMS ((rtx));
1418extern int inequality_comparisons_p PARAMS ((rtx));
1419extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
770ae6cc
RK		 1420extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1421 int));
cdadb1dd
KG		 1422extern int computed_jump_p PARAMS ((rtx));
1423typedef int (*rtx_function) PARAMS ((rtx *, void *));
1424extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
770ae6cc 1425extern rtx regno_use_in PARAMS ((unsigned int, rtx));
cdadb1dd
KG		 1426extern int auto_inc_p PARAMS ((rtx));
1427extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1428extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
db7ba742 1429extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
6f29feb1 1430
ae0b51ef
JL		 1431/* flow.c */
1432
cdadb1dd
KG		 1433extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1434void init_EXPR_INSN_LIST_cache PARAMS ((void));
1435void free_EXPR_LIST_list PARAMS ((rtx *));
1436void free_INSN_LIST_list PARAMS ((rtx *));
1437void free_EXPR_LIST_node PARAMS ((rtx));
1438void free_INSN_LIST_node PARAMS ((rtx));
1439rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1440rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
d9d4fb43 1441void clear_log_links PARAMS ((rtx));
ae0b51ef
JL		 1442
1443/* regclass.c */
1444
6f29feb1
JW		 1445/* Maximum number of parallel sets and clobbers in any insn in this fn.
1446 Always at least 3, since the combiner could put that many togetherm
1447 and we want this to remain correct for all the remaining passes. */
1448
1449extern int max_parallel;
1450
e0c6d139 1451/* Free up register info memory. */
cdadb1dd 1452extern void free_reg_info PARAMS ((void));
e0c6d139 1453
ae0b51ef 1454/* recog.c */
cdadb1dd 1455extern int asm_noperands PARAMS ((rtx));
3cce094d 1456extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
9b3142b3
KG		 1457 const char **,
1458 enum machine_mode *));
6f29feb1 1459
cdadb1dd
KG		 1460extern enum reg_class reg_preferred_class PARAMS ((int));
1461extern enum reg_class reg_alternate_class PARAMS ((int));
6f29feb1 1462
cdadb1dd 1463extern rtx get_first_nonparm_insn PARAMS ((void));
6f29feb1 1464
cdadb1dd 1465extern void split_all_insns PARAMS ((int));
6f862f2f 1466extern void split_all_insns_noflow PARAMS ((void));
6a73406e 1467
68d75312 1468#define MAX_SAVED_CONST_INT 64
5da077de 1469extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
68d75312 1470
5da077de
AS		 1471#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1472#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1473#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1474#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
6f29feb1 1475extern rtx const_true_rtx;
a8efe40d
RK		 1476
1477extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1478
f590cca1 1479/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
a8efe40d
RK		 1480 same as VOIDmode. */
1481
1482#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1483
1484/* Likewise, for the constants 1 and 2. */
1485
1486#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1487#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
6f29feb1 1488
5da077de
AS		 1489/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1490 is used to represent the frame pointer. This is because the
1491 hard frame pointer and the automatic variables are separated by an amount
1492 that cannot be determined until after register allocation. We can assume
1493 that in this case ELIMINABLE_REGS will be defined, one action of which
1494 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1495#ifndef HARD_FRAME_POINTER_REGNUM
1496#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1497#endif
1498
1499/* Index labels for global_rtl. */
1500enum global_rtl_index
68d75312 1501{
5da077de
AS		 1502 GR_PC,
1503 GR_CC0,
1504 GR_STACK_POINTER,
1505 GR_FRAME_POINTER,
1506/* For register elimination to work properly these hard_frame_pointer_rtx,
1507 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1508 the same register. */
1509#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1510 GR_ARG_POINTER = GR_FRAME_POINTER,
1511#endif
1512#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1513 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1514#else
1515 GR_HARD_FRAME_POINTER,
1516#endif
1517#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1518#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1519 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1520#else
1521 GR_ARG_POINTER,
1522#endif
1523#endif
1524 GR_VIRTUAL_INCOMING_ARGS,
1525 GR_VIRTUAL_STACK_ARGS,
1526 GR_VIRTUAL_STACK_DYNAMIC,
1527 GR_VIRTUAL_OUTGOING_ARGS,
1528 GR_VIRTUAL_CFA,
1529
1530 GR_MAX
1531};
1532
1533/* Pointers to standard pieces of rtx are stored here. */
1534extern rtx global_rtl[GR_MAX];
1535
1536/* Standard pieces of rtx, to be substituted directly into things. */
1537#define pc_rtx (global_rtl[GR_PC])
1538#define cc0_rtx (global_rtl[GR_CC0])
68d75312 1539
6f29feb1
JW		 1540/* All references to certain hard regs, except those created
1541 by allocating pseudo regs into them (when that's possible),
1542 go through these unique rtx objects. */
5da077de
AS		 1543#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1544#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1545#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1546#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
68d75312 1547
6f29feb1
JW		 1548extern rtx pic_offset_table_rtx;
1549extern rtx struct_value_rtx;
1550extern rtx struct_value_incoming_rtx;
1551extern rtx static_chain_rtx;
1552extern rtx static_chain_incoming_rtx;
07ebc930 1553extern rtx return_address_pointer_rtx;
3b80f6ca
RH		 1554
1555/* Include the RTL generation functions. */
1556
1557#ifndef NO_GENRTL_H
1558#include "genrtl.h"
1559#endif
1560
41472af8
MM		 1561/* There are some RTL codes that require special attention; the
1562 generation functions included above do the raw handling. If you
b4213325
MM		 1563 add to this list, modify special_rtx in gengenrtl.c as well. You
1564 should also modify gen_rtx to use the special function. */
3b80f6ca 1565
cdadb1dd 1566extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
0133b7d9 1567 HOST_WIDE_INT, HOST_WIDE_INT));
cdadb1dd 1568extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
08394eef 1569extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
cdadb1dd 1570extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
ddef6bc7 1571extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
cdadb1dd 1572extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
3b80f6ca 1573
ddef6bc7
JJ		 1574extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1575
aefdd5ab
JL		 1576/* We need the cast here to ensure that we get the same result both with
1577 and without prototypes. */
1578#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
3b80f6ca 1579
6f29feb1
JW		 1580/* Virtual registers are used during RTL generation to refer to locations into
1581 the stack frame when the actual location isn't known until RTL generation
1582 is complete. The routine instantiate_virtual_regs replaces these with
1583 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1584 a constant. */
1585
1586#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1587
1588/* This points to the first word of the incoming arguments passed on the stack,
1589 either by the caller or by the callee when pretending it was passed by the
1590 caller. */
1591
5da077de 1592#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
6f29feb1
JW		 1593
1594#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1595
60343c3b 1596/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
6f29feb1
JW		 1597 variable on the stack. Otherwise, it points to the first variable on
1598 the stack. */
1599
5da077de 1600#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
6f29feb1
JW		 1601
1602#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1603
1604/* This points to the location of dynamically-allocated memory on the stack
1605 immediately after the stack pointer has been adjusted by the amount
1606 desired. */
1607
5da077de 1608#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
6f29feb1
JW		 1609
1610#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1611
1612/* This points to the location in the stack at which outgoing arguments should
1613 be written when the stack is pre-pushed (arguments pushed using push
1614 insns always use sp). */
1615
5da077de 1616#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
6f29feb1
JW		 1617
1618#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1619
71038426
RH		 1620/* This points to the Canonical Frame Address of the function. This
1621 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1622 but is calculated relative to the arg pointer for simplicity; the
f590cca1 1623 frame pointer nor stack pointer are necessarily fixed relative to
71038426
RH		 1624 the CFA until after reload. */
1625
5da077de 1626#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
71038426
RH		 1627
1628#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1629
1630#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
6f29feb1 1631
848e0190
JH		 1632/* REGNUM never really appearing in the INSN stream. */
1633#define INVALID_REGNUM (~(unsigned int)0)
1634
cdadb1dd 1635extern rtx find_next_ref PARAMS ((rtx, rtx));
f837a861 1636
bd7cf17e 1637extern rtx output_constant_def PARAMS ((union tree_node *, int));
cdadb1dd 1638extern rtx immed_real_const PARAMS ((union tree_node *));
6f29feb1
JW		 1639
1640/* Define a default value for STORE_FLAG_VALUE. */
1641
1642#ifndef STORE_FLAG_VALUE
1643#define STORE_FLAG_VALUE 1
1644#endif
1645
0ea0e871
JL		 1646/* Nonzero after the second flow pass has completed.
1647 Set to 1 or 0 by toplev.c */
1648extern int flow2_completed;
1649
6f29feb1 1650/* Nonzero after end of reload pass.
0ea0e871 1651 Set to 1 or 0 by reload1.c. */
6f29feb1
JW		 1652
1653extern int reload_completed;
1654
1655/* Set to 1 while reload_as_needed is operating.
1656 Required by some machines to handle any generated moves differently. */
1657
1658extern int reload_in_progress;
1659
1660/* If this is nonzero, we do not bother generating VOLATILE
1661 around volatile memory references, and we are willing to
1662 output indirect addresses. If cse is to follow, we reject
1663 indirect addresses so a useful potential cse is generated;
1664 if it is used only once, instruction combination will produce
1665 the same indirect address eventually. */
1666extern int cse_not_expected;
1667
f1db3576
JL		 1668/* Set to nonzero before life analysis to indicate that it is unsafe to
1669 generate any new pseudo registers. */
1670extern int no_new_pseudos;
1671
f5118aa5 1672/* Translates rtx code to tree code, for those codes needed by
88efc60a
RK		 1673 REAL_ARITHMETIC. The function returns an int because the caller may not
1674 know what `enum tree_code' means. */
1675
cdadb1dd 1676extern int rtx_to_tree_code PARAMS ((enum rtx_code));
9ae8ffe7 1677
ac957f13 1678/* In tree.c */
ac957f13 1679struct obstack;
cdadb1dd 1680extern void gcc_obstack_init PARAMS ((struct obstack *));
1f8f4a0b 1681
ac957f13
JL		 1682/* In cse.c */
1683struct cse_basic_block_data;
f1c1dfc3
BS		 1684
1685/* Return the right cost to give to an operation
1686 to make the cost of the corresponding register-to-register instruction
1687 N times that of a fast register-to-register instruction. */
1688#define COSTS_N_INSNS(N) ((N) * 4)
1689
1690/* Maximum cost of a rtl expression. This value has the special meaning
1691 not to use an rtx with this cost under any circumstances. */
1692#define MAX_COST INT_MAX
1693
cdadb1dd 1694extern int rtx_cost PARAMS ((rtx, enum rtx_code));
01329426 1695extern int address_cost PARAMS ((rtx, enum machine_mode));
4793dca1 1696extern void delete_trivially_dead_insns PARAMS ((rtx, int, int));
ac957f13 1697#ifdef BUFSIZ
cdadb1dd 1698extern int cse_main PARAMS ((rtx, int, int, FILE *));
ac957f13 1699#endif
cdadb1dd 1700extern void cse_end_of_basic_block PARAMS ((rtx,
ac957f13
JL		 1701 struct cse_basic_block_data *,
1702 int, int, int));
1703
1704/* In jump.c */
cdadb1dd
KG		 1705extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1706extern int condjump_p PARAMS ((rtx));
e4c85816
JH		 1707extern int any_condjump_p PARAMS ((rtx));
1708extern int any_uncondjump_p PARAMS ((rtx));
1709extern int safe_to_remove_jump_p PARAMS ((rtx));
1710extern rtx pc_set PARAMS ((rtx));
cdadb1dd
KG		 1711extern rtx condjump_label PARAMS ((rtx));
1712extern int simplejump_p PARAMS ((rtx));
1713extern int returnjump_p PARAMS ((rtx));
1714extern int onlyjump_p PARAMS ((rtx));
1715extern int sets_cc0_p PARAMS ((rtx));
2ea64f10 1716extern int invert_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1717extern int invert_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1718extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1719extern int true_regnum PARAMS ((rtx));
2ea64f10 1720extern int redirect_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1721extern int redirect_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1722extern void rebuild_jump_labels PARAMS ((rtx));
1723extern void thread_jumps PARAMS ((rtx, int, int));
cdadb1dd 1724extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
cdadb1dd 1725extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
ab94bc48
JH		 1726extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1727extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1728 rtx, rtx, rtx));
cdadb1dd
KG		 1729extern void delete_for_peephole PARAMS ((rtx, rtx));
1730extern int condjump_in_parallel_p PARAMS ((rtx));
1731extern void never_reached_warning PARAMS ((rtx));
0045d504
JH		 1732extern void purge_line_number_notes PARAMS ((rtx));
1733extern void copy_loop_headers PARAMS ((rtx));
14bf4a33 1734
ac957f13 1735/* In emit-rtl.c. */
cdadb1dd
KG		 1736extern int max_reg_num PARAMS ((void));
1737extern int max_label_num PARAMS ((void));
1738extern int get_first_label_num PARAMS ((void));
1739extern void delete_insns_since PARAMS ((rtx));
1740extern void mark_reg_pointer PARAMS ((rtx, int));
1741extern void mark_user_reg PARAMS ((rtx));
1742extern void reset_used_flags PARAMS ((rtx));
1743extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1744extern int get_max_uid PARAMS ((void));
1745extern int in_sequence_p PARAMS ((void));
1746extern void force_next_line_note PARAMS ((void));
1747extern void clear_emit_caches PARAMS ((void));
1748extern void init_emit PARAMS ((void));
1749extern void init_emit_once PARAMS ((int));
1750extern void push_topmost_sequence PARAMS ((void));
1751extern void pop_topmost_sequence PARAMS ((void));
1752extern int subreg_realpart_p PARAMS ((rtx));
1753extern void reverse_comparison PARAMS ((rtx));
1754extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1755extern void set_new_first_and_last_label_num PARAMS ((int, int));
1756extern void set_new_last_label_num PARAMS ((int));
d1b81779 1757extern void unshare_all_rtl_again PARAMS ((rtx));
cdadb1dd
KG		 1758extern void set_last_insn PARAMS ((rtx));
1759extern void link_cc0_insns PARAMS ((rtx));
1760extern void add_insn PARAMS ((rtx));
1761extern void add_insn_before PARAMS ((rtx, rtx));
1762extern void add_insn_after PARAMS ((rtx, rtx));
1763extern void remove_insn PARAMS ((rtx));
1764extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1765extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1766extern enum rtx_code classify_insn PARAMS ((rtx));
1767extern rtx emit PARAMS ((rtx));
a11759a3
JR		 1768/* Query and clear/ restore no_line_numbers. This is used by the
1769 switch / case handling in stmt.c to give proper line numbers in
1770 warnings about unreachable code. */
cdadb1dd
KG		 1771int force_line_numbers PARAMS ((void));
1772void restore_line_number_status PARAMS ((int old_value));
1773extern void renumber_insns PARAMS ((FILE *));
f8855270 1774extern void remove_unnecessary_notes PARAMS ((void));
ac957f13 1775
ac957f13 1776/* In combine.c */
770ae6cc
RK		 1777extern int combine_instructions PARAMS ((rtx, unsigned int));
1778extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1779extern rtx remove_death PARAMS ((unsigned int, rtx));
ac957f13 1780#ifdef BUFSIZ
cdadb1dd
KG		 1781extern void dump_combine_stats PARAMS ((FILE *));
1782extern void dump_combine_total_stats PARAMS ((FILE *));
ac957f13
JL		 1783#endif
1784
1785/* In sched.c. */
1786#ifdef BUFSIZ
cdadb1dd 1787extern void schedule_insns PARAMS ((FILE *));
18e720b3 1788extern void schedule_ebbs PARAMS ((FILE *));
ac957f13 1789#endif
cdadb1dd 1790extern void fix_sched_param PARAMS ((const char *, const char *));
ac957f13
JL		 1791
1792/* In print-rtl.c */
47c10e9b 1793extern const char *print_rtx_head;
cdadb1dd
KG		 1794extern void debug_rtx PARAMS ((rtx));
1795extern void debug_rtx_list PARAMS ((rtx, int));
4c85a96d 1796extern void debug_rtx_range PARAMS ((rtx, rtx));
cdadb1dd 1797extern rtx debug_rtx_find PARAMS ((rtx, int));
ac957f13 1798#ifdef BUFSIZ
cdadb1dd 1799extern void print_rtl PARAMS ((FILE *, rtx));
75b7557d 1800extern void print_simple_rtl PARAMS ((FILE *, rtx));
cdadb1dd
KG		 1801extern int print_rtl_single PARAMS ((FILE *, rtx));
1802extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
ac957f13
JL		 1803#endif
1804
1805/* In loop.c */
cdadb1dd
KG		 1806extern void init_loop PARAMS ((void));
1807extern rtx libcall_other_reg PARAMS ((rtx, rtx));
ac957f13 1808#ifdef BUFSIZ
1bf14ad7 1809extern void loop_optimize PARAMS ((rtx, FILE *, int));
ac957f13 1810#endif
cdadb1dd 1811extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
ac957f13
JL		 1812
1813/* In function.c */
cdadb1dd
KG		 1814extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1815extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1816extern int prologue_epilogue_contains PARAMS ((rtx));
0a1c58a2 1817extern int sibcall_epilogue_contains PARAMS ((rtx));
591ccf92 1818extern void preserve_rtl_expr_result PARAMS ((rtx));
cdadb1dd
KG		 1819extern void mark_temp_addr_taken PARAMS ((rtx));
1820extern void update_temp_slot_address PARAMS ((rtx, rtx));
cdadb1dd 1821extern void purge_addressof PARAMS ((rtx));
659e47fb 1822extern void purge_hard_subreg_sets PARAMS ((rtx));
ac957f13 1823
ac957f13 1824/* In stmt.c */
47ee9bcb 1825extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
cdadb1dd
KG		 1826extern void expand_null_return PARAMS ((void));
1827extern void emit_jump PARAMS ((rtx));
1828extern int preserve_subexpressions_p PARAMS ((void));
ac957f13
JL		 1829
1830/* In expr.c */
3bdf5ad1
RK		 1831extern void move_by_pieces PARAMS ((rtx, rtx,
1832 unsigned HOST_WIDE_INT,
1833 unsigned int));
2e245dac 1834
ac957f13 1835/* In flow.c */
cdadb1dd 1836extern void recompute_reg_usage PARAMS ((rtx, int));
ac957f13 1837#ifdef BUFSIZ
cdadb1dd
KG		 1838extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1839extern void dump_flow_info PARAMS ((FILE *));
ac957f13
JL		 1840#endif
1841
1842/* In expmed.c */
cdadb1dd
KG		 1843extern void init_expmed PARAMS ((void));
1844extern void expand_inc PARAMS ((rtx, rtx));
1845extern void expand_dec PARAMS ((rtx, rtx));
1846extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
ac957f13
JL		 1847 unsigned HOST_WIDE_INT, rtx,
1848 int, int));
1849
50b2596f
KG		 1850/* In gcse.c */
1851#ifdef BUFSIZ
cdadb1dd 1852extern int gcse_main PARAMS ((rtx, FILE *));
50b2596f
KG		 1853#endif
1854
ac957f13 1855/* In global.c */
cdadb1dd 1856extern void mark_elimination PARAMS ((int, int));
ac957f13 1857#ifdef BUFSIZ
cdadb1dd
KG		 1858extern int global_alloc PARAMS ((FILE *));
1859extern void dump_global_regs PARAMS ((FILE *));
ac957f13 1860#endif
cab634f2 1861#ifdef HARD_CONST
cdadb1dd 1862extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
cab634f2 1863#endif
d29c259b 1864extern void build_insn_chain PARAMS ((rtx));
ac957f13
JL		 1865
1866/* In regclass.c */
cdadb1dd
KG		 1867extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1868extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1869extern void globalize_reg PARAMS ((int));
1870extern void init_regs PARAMS ((void));
1871extern void init_reg_sets PARAMS ((void));
1872extern void regset_release_memory PARAMS ((void));
1873extern void regclass_init PARAMS ((void));
1874extern void regclass PARAMS ((rtx, int, FILE *));
770ae6cc
RK		 1875extern void reg_scan PARAMS ((rtx, unsigned int, int));
1876extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
cdadb1dd
KG		 1877extern void fix_register PARAMS ((const char *, int, int));
1878
1879extern void delete_null_pointer_checks PARAMS ((rtx));
a157febd 1880
50b2596f
KG		 1881/* In regmove.c */
1882#ifdef BUFSIZ
cdadb1dd 1883extern void regmove_optimize PARAMS ((rtx, int, FILE *));
50b2596f 1884#endif
1e7f0a48 1885extern void combine_stack_adjustments PARAMS ((void));
50b2596f
KG		 1886
1887/* In reorg.c */
1888#ifdef BUFSIZ
cdadb1dd 1889extern void dbr_schedule PARAMS ((rtx, FILE *));
50b2596f
KG		 1890#endif
1891
ac957f13
JL		 1892/* In local-alloc.c */
1893#ifdef BUFSIZ
cdadb1dd 1894extern void dump_local_alloc PARAMS ((FILE *));
ac957f13 1895#endif
cdadb1dd
KG		 1896extern int local_alloc PARAMS ((void));
1897extern int function_invariant_p PARAMS ((rtx));
ac957f13 1898
ac957f13 1899/* In profile.c */
cdadb1dd 1900extern void init_branch_prob PARAMS ((const char *));
51891abe
JH		 1901extern void branch_prob PARAMS ((void));
1902extern void end_branch_prob PARAMS ((void));
cdadb1dd 1903extern void output_func_start_profiler PARAMS ((void));
ac957f13
JL		 1904
1905/* In reg-stack.c */
1906#ifdef BUFSIZ
cdadb1dd 1907extern void reg_to_stack PARAMS ((rtx, FILE *));
ac957f13 1908#endif
ac957f13
JL		 1909
1910/* In fold-const.c */
05bccae2
RK		 1911extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1912 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1913 unsigned HOST_WIDE_INT *,
1914 HOST_WIDE_INT *));
1915extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1916 unsigned HOST_WIDE_INT *,
1917 HOST_WIDE_INT *));
1918extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1919 HOST_WIDE_INT,
1920 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1921 unsigned HOST_WIDE_INT *,
1922 HOST_WIDE_INT *));
1923extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1924 HOST_WIDE_INT, unsigned int,
1925 unsigned HOST_WIDE_INT *,
1926 HOST_WIDE_INT *, int));
1927extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1928 HOST_WIDE_INT, unsigned int,
1929 unsigned HOST_WIDE_INT *,
1930 HOST_WIDE_INT *, int));
1931extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1932 HOST_WIDE_INT, unsigned int,
1933 unsigned HOST_WIDE_INT *,
1934 HOST_WIDE_INT *));
1935extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1936 HOST_WIDE_INT, unsigned int,
1937 unsigned HOST_WIDE_INT *,
1938 HOST_WIDE_INT *));
ac957f13
JL		 1939
1940/* In calls.c */
ebb1b59a
BS		 1941enum libcall_type
1942{
1943 LCT_NORMAL = 0,
1944 LCT_CONST = 1,
1945 LCT_PURE = 2,
1946 LCT_CONST_MAKE_BLOCK = 3,
695ee791 1947 LCT_PURE_MAKE_BLOCK = 4,
9555a122
RH		 1948 LCT_NORETURN = 5,
1949 LCT_THROW = 6
ebb1b59a
BS		 1950};
1951
1952extern void emit_library_call PARAMS ((rtx, enum libcall_type,
1953 enum machine_mode, int,
1954 ...));
1955extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
1956 enum machine_mode, int,
1957 ...));
ac957f13
JL		 1958
1959/* In unroll.c */
cdadb1dd 1960extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
ac957f13
JL		 1961
1962/* In varasm.c */
cdadb1dd 1963extern int in_data_section PARAMS ((void));
cdadb1dd 1964extern void init_varasm_once PARAMS ((void));
ac957f13
JL		 1965
1966/* In rtl.c */
cdadb1dd 1967extern void init_rtl PARAMS ((void));
c25c12b8
R		 1968extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
1969 void *));
1970struct md_constant { char *name, *value; };
ac957f13 1971
bcdaba58 1972#ifdef BUFSIZ
cdadb1dd
KG		 1973extern int read_skip_spaces PARAMS ((FILE *));
1974extern rtx read_rtx PARAMS ((FILE *));
bcdaba58
RH		 1975#endif
1976
1977extern const char *read_rtx_filename;
1978extern int read_rtx_lineno;
1979
987009bf
ZW		 1980/* Redefine abort to report an internal error w/o coredump, and
1981 reporting the location of the error in the source file. This logic
1982 is duplicated in rtl.h and tree.h because every file that needs the
1983 special abort includes one or both. toplev.h gets too few files,
1984 system.h gets too many. */
1985
cdadb1dd 1986extern void fancy_abort PARAMS ((const char *, int, const char *))
987009bf 1987 ATTRIBUTE_NORETURN;
fbfc1192 1988#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
987009bf 1989
ac957f13 1990/* In alias.c */
db048faf 1991extern rtx canon_rtx PARAMS ((rtx));
cdadb1dd 1992extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
e38fe8e0 1993 int (*)(rtx, int)));
a13d4ebf
AM		 1994extern rtx get_addr PARAMS ((rtx));
1995extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
1996 rtx, int (*)(rtx, int)));
cdadb1dd
KG		 1997extern int read_dependence PARAMS ((rtx, rtx));
1998extern int anti_dependence PARAMS ((rtx, rtx));
1999extern int output_dependence PARAMS ((rtx, rtx));
2000extern void mark_constant_function PARAMS ((void));
2001extern void init_alias_once PARAMS ((void));
2002extern void init_alias_analysis PARAMS ((void));
2003extern void end_alias_analysis PARAMS ((void));
cdadb1dd 2004extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
ba4828e0 2005extern void set_mem_alias_set PARAMS ((rtx, HOST_WIDE_INT));
4c649323 2006
0a1c58a2
JL		 2007/* In sibcall.c */
2008typedef enum {
2009 sibcall_use_normal = 1,
2010 sibcall_use_tail_recursion,
2011 sibcall_use_sibcall
2012} sibcall_use_t;
2013
2014extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2015extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2016
21b2cd73 2017#ifdef STACK_REGS
cdadb1dd 2018extern int stack_regs_mentioned PARAMS ((rtx insn));
21b2cd73
JH		 2019#endif
2020
a157febd 2021/* In toplev.c */
a157febd 2022extern rtx stack_limit_rtx;
dfdb644f 2023
7b82b5da 2024/* In regrename.c */
7b82b5da
SC		 2025extern void regrename_optimize PARAMS ((void));
2026
4db384c9 2027/* In ifcvt.c */
2ea64f10
RH		 2028extern void if_convert PARAMS ((int));
2029
4db384c9
JH		 2030/* In predict.c */
2031extern void invert_br_probabilities PARAMS ((rtx));
88657302 2032#endif /* ! GCC_RTL_H */
GNU Compiler Collection
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