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c-common.c: Fix comment typos.
[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 4
1322177d 5This file is part of GCC.
6f29feb1 6
1322177d
LB		 7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
6f29feb1 11
1322177d
LB		 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
6f29feb1
JW		 16
17You should have received a copy of the GNU General Public License
1322177d
LB		 18along with GCC; see the file COPYING. If not, write to the Free
19Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2002111-1307, USA. */
6f29feb1 21
88657302
RH		 22#ifndef GCC_RTL_H
23#define GCC_RTL_H
6f29feb1 24
36edd3cc
BS		 25struct function;
26
6f29feb1
JW		 27#include "machmode.h"
28
29#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
1cfc3092 30#undef FLOAT /* Likewise. */
ac889e46 31#undef ABS /* Likewise. */
71ae9cc6 32#undef PC /* Likewise. */
6f29feb1 33
173b24b9
RK		 34/* Value used by some passes to "recognize" noop moves as valid
35 instructions. */
b5832b43
JH		 36#define NOOP_MOVE_INSN_CODE INT_MAX
37
6f29feb1
JW		 38/* Register Transfer Language EXPRESSIONS CODES */
39
40#define RTX_CODE enum rtx_code
41enum rtx_code {
42
43#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44#include "rtl.def" /* rtl expressions are documented here */
45#undef DEF_RTL_EXPR
46
6dc42e49 47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
6f29feb1 48 NUM_RTX_CODE.
6dc42e49 49 Assumes default enum value assignment. */
6f29feb1
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. */
173b24b9
RK		 74 unsigned min_after_vec: 1; /* minimum address target label is
75 after the ADDR_DIFF_VEC. */
76 unsigned max_after_vec: 1; /* maximum address target label is
77 after the ADDR_DIFF_VEC. */
78 unsigned min_after_base: 1; /* minimum address target label is
79 after BASE. */
80 unsigned max_after_base: 1; /* maximum address target label is
81 after BASE. */
33f7f353
JR		 82 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
83 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
84 unsigned : 2;
85 unsigned scale : 8;
86} addr_diff_vec_flags;
87
173b24b9
RK		 88/* Structure used to describe the attributes of a MEM. These are hashed
89 so MEMs that the same attributes share a data structure. This means
90 they cannot be modified in place. If any element is nonzero, it means
91 the value of the corresponding attribute is unknown. */
92typedef struct
93{
94 HOST_WIDE_INT alias; /* Memory alias set. */
95 tree decl; /* decl corresponding to MEM. */
96 rtx offset; /* Offset from start of DECL, as CONST_INT. */
97 rtx size; /* Size in bytes, as a CONST_INT. */
98 unsigned int align; /* Alignment of MEM in bytes. */
99} mem_attrs;
100
6f29feb1
JW		 101/* Common union for an element of an rtx. */
102
103typedef union rtunion_def
104{
5f4f0e22 105 HOST_WIDE_INT rtwint;
6f29feb1 106 int rtint;
770ae6cc 107 unsigned int rtuint;
3cce094d 108 const char *rtstr;
2f78c311
ZW		 109 rtx rtx;
110 rtvec rtvec;
6f29feb1 111 enum machine_mode rttype;
33f7f353 112 addr_diff_vec_flags rt_addr_diff_vec_flags;
eab5c70a 113 struct cselib_val_struct *rt_cselib;
0dfa1860 114 struct bitmap_head_def *rtbit;
2f78c311 115 tree rttree;
e881bb1b 116 struct basic_block_def *bb;
173b24b9 117 mem_attrs *rtmem;
6f29feb1
JW		 118} rtunion;
119
120/* RTL expression ("rtx"). */
121
2f78c311 122struct rtx_def
6f29feb1 123{
6f29feb1 124 /* The kind of expression this is. */
c149cc37 125 ENUM_BITFIELD(rtx_code) code: 16;
18def38f 126
6f29feb1 127 /* The kind of value the expression has. */
c149cc37
RL		 128 ENUM_BITFIELD(machine_mode) mode : 8;
129
0a1c58a2 130 /* 1 in an INSN if it can alter flow of control
b8ec5764
VM		 131 within this function.
132 LINK_COST_ZERO in an INSN_LIST. */
6f29feb1 133 unsigned int jump : 1;
b8ec5764
VM		 134 /* 1 in an INSN if it can call another function.
135 LINK_COST_FREE in an INSN_LIST. */
6f29feb1 136 unsigned int call : 1;
49982682
JW		 137 /* 1 in a REG if value of this expression will never change during
138 the current function, even though it is not manifestly constant.
139 1 in a MEM if contents of memory are constant. This does not
140 necessarily mean that the value of this expression is constant.
07be3989 141 1 in a SUBREG if it is from a promoted variable that is unsigned.
6f29feb1
JW		 142 1 in a SYMBOL_REF if it addresses something in the per-function
143 constants pool.
144 1 in a CALL_INSN if it is a const call.
145 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
146 reorg until end of compilation; cleared before used. */
147 unsigned int unchanging : 1;
148 /* 1 in a MEM expression if contents of memory are volatile.
149 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
150 if it is deleted.
151 1 in a REG expression if corresponds to a variable declared by the user.
152 0 for an internally generated temporary.
2a406d2a
RS		 153 In a SYMBOL_REF, this flag is used for machine-specific purposes.
154 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
6f29feb1 155 unsigned int volatil : 1;
8358a974 156 /* 1 in a MEM referring to a field of an aggregate.
6f29feb1
JW		 157 0 if the MEM was a variable or the result of a * operator in C;
158 1 if it was the result of a . or -> operator (on a struct) in C.
159 1 in a REG if the register is used only in exit code a loop.
f590cca1 160 1 in a SUBREG expression if was generated from a variable with a
07be3989 161 promoted mode.
6f29feb1
JW		 162 1 in a CODE_LABEL if the label is used for nonlocal gotos
163 and must not be deleted even if its count is zero.
164 1 in a LABEL_REF if this is a reference to a label outside the
165 current loop.
166 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
d45cf215 167 together with the preceding insn. Valid only within sched.
6f29feb1
JW		 168 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
169 from the target of a branch. Valid from reorg until end of compilation;
b53978a3
JO		 170 cleared before used.
171 1 in an INSN if this insn is dead code. Valid only during
172 dead-code elimination phase; cleared before use. */
6f29feb1
JW		 173 unsigned int in_struct : 1;
174 /* 1 if this rtx is used. This is used for copying shared structure.
175 See `unshare_all_rtl'.
f590cca1 176 In a REG, this is not needed for that purpose, and used instead
6f29feb1
JW		 177 in `leaf_renumber_regs_insn'.
178 In a SYMBOL_REF, means that emit_library_call
179 has used it as the function. */
180 unsigned int used : 1;
181 /* Nonzero if this rtx came from procedure integration.
182 In a REG, nonzero means this reg refers to the return value
ff0b6b99
FS		 183 of the current function.
184 1 in a SYMBOL_REF if the symbol is weak. */
6f29feb1 185 unsigned integrated : 1;
b664de3a 186 /* 1 in an INSN or a SET if this rtx is related to the call frame,
c6df88cb 187 either changing how we compute the frame address or saving and
f590cca1 188 restoring registers in the prologue and epilogue.
c6df88cb 189 1 in a MEM if the MEM refers to a scalar, rather than a member of
bd7cf17e 190 an aggregate.
3502dc9c 191 1 in a REG if the register is a pointer.
bd7cf17e
JJ		 192 1 in a SYMBOL_REF if it addresses something in the per-function
193 constant string pool. */
469ac993 194 unsigned frame_related : 1;
0a25f1f5 195
6f29feb1
JW		 196 /* The first element of the operands of this rtx.
197 The number of operands and their types are controlled
198 by the `code' field, according to rtl.def. */
199 rtunion fld[1];
2f78c311 200};
6f29feb1
JW		 201
202#define NULL_RTX (rtx) 0
203
204/* Define macros to access the `code' field of the rtx. */
205
dbbbbf3b
JDA		 206#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
207#define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
6f29feb1 208
dbbbbf3b
JDA		 209#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
210#define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
6f29feb1
JW		 211
212#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
213#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
469ac993 214#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
6f29feb1
JW		 215
216/* RTL vector. These appear inside RTX's when there is a need
217 for a variable number of things. The principle use is inside
218 PARALLEL expressions. */
219
2f78c311 220struct rtvec_def {
e9a25f70 221 int num_elem; /* number of elements */
2f78c311
ZW		 222 rtx elem[1];
223};
6f29feb1
JW		 224
225#define NULL_RTVEC (rtvec) 0
226
227#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
e9a25f70 228#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
6f29feb1 229
b53978a3 230/* Predicate yielding nonzero iff X is an rtl for a register. */
6f29feb1
JW		 231#define REG_P(X) (GET_CODE (X) == REG)
232
b53978a3
JO		 233/* Predicate yielding nonzero iff X is a label insn. */
234#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
235
236/* Predicate yielding nonzero iff X is a jump insn. */
237#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
238
239/* Predicate yielding nonzero iff X is a note insn. */
240#define NOTE_P(X) (GET_CODE (X) == NOTE)
241
242/* Predicate yielding nonzero iff X is a barrier insn. */
243#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
244
245/* Predicate yielding nonzero iff X is a data for a jump table. */
246#define JUMP_TABLE_DATA_P(INSN) \
247 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
248 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
249
6f29feb1
JW		 250/* 1 if X is a constant value that is an integer. */
251
252#define CONSTANT_P(X) \
253 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
254 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
ee5332b8
RH		 255 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
256 || GET_CODE (X) == CONSTANT_P_RTX)
6f29feb1
JW		 257
258/* General accessor macros for accessing the fields of an rtx. */
259
f4524c9e 260#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
ef178af3
ZW		 261/* The bit with a star outside the statement expr and an & inside is
262 so that N can be evaluated only once. */
8784fdcd 263#define RTL_CHECK1(RTX, N, C1) __extension__ \
83ab3839 264(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 265 enum rtx_code _code = GET_CODE (_rtx); \
266 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
fbfc1192 267 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
ef178af3 268 if (GET_RTX_FORMAT(_code)[_n] != C1) \
fbfc1192 269 rtl_check_failed_type1(_rtx, _n, C1, __FILE__, __LINE__, __FUNCTION__); \
ef178af3
ZW		 270 &_rtx->fld[_n]; }))
271
8784fdcd 272#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
83ab3839 273(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 274 enum rtx_code _code = GET_CODE (_rtx); \
275 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
fbfc1192 276 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
ef178af3
ZW		 277 if (GET_RTX_FORMAT(_code)[_n] != C1 \
278 && GET_RTX_FORMAT(_code)[_n] != C2) \
279 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
fbfc1192 280 __FUNCTION__); \
ef178af3
ZW		 281 &_rtx->fld[_n]; }))
282
8784fdcd 283#define RTL_CHECKC1(RTX, N, C) __extension__ \
83ab3839
RH		 284(*({ rtx _rtx = (RTX); int _n = (N); \
285 if (GET_CODE (_rtx) != C) \
fbfc1192 286 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, __FUNCTION__); \
83ab3839
RH		 287 &_rtx->fld[_n]; }))
288
8784fdcd 289#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
83ab3839
RH		 290(*({ rtx _rtx = (RTX); int _n = (N); \
291 enum rtx_code _code = GET_CODE (_rtx); \
292 if (_code != C1 && _code != C2) \
fbfc1192 293 rtl_check_failed_code2(_rtx, C1, C2, __FILE__, __LINE__, __FUNCTION__); \
83ab3839
RH		 294 &_rtx->fld[_n]; }))
295
8784fdcd 296#define RTVEC_ELT(RTVEC, I) __extension__ \
83ab3839 297(*({ rtvec _rtvec = (RTVEC); int _i = (I); \
ef178af3
ZW		 298 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
299 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
fbfc1192 300 __FUNCTION__); \
ef178af3
ZW		 301 &_rtvec->elem[_i]; }))
302
cdadb1dd 303extern void rtl_check_failed_bounds PARAMS ((rtx, int,
ef178af3
ZW		 304 const char *, int, const char *))
305 ATTRIBUTE_NORETURN;
cdadb1dd 306extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
ef178af3
ZW		 307 const char *, int, const char *))
308 ATTRIBUTE_NORETURN;
cdadb1dd 309extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
ef178af3
ZW		 310 const char *, int, const char *))
311 ATTRIBUTE_NORETURN;
cdadb1dd 312extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
83ab3839
RH		 313 const char *, int, const char *))
314 ATTRIBUTE_NORETURN;
cdadb1dd 315extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
83ab3839
RH		 316 const char *, int, const char *))
317 ATTRIBUTE_NORETURN;
cdadb1dd 318extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
ef178af3
ZW		 319 const char *, int, const char *))
320 ATTRIBUTE_NORETURN;
321
f4524c9e 322#else /* not ENABLE_RTL_CHECKING */
ef178af3 323
83ab3839
RH		 324#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
325#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
326#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
818a3b15 327#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
83ab3839 328#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
ef178af3
ZW		 329
330#endif
331
332#define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
333#define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
334#define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
335#define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
336#define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
337#define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
338#define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
339#define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
340#define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
1f3b37a3 341#define XTMPL(RTX, N) (RTL_CHECK1(RTX, N, 'T').rtstr)
ef178af3
ZW		 342
343#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
344#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
345
346/* These are like XWINT, etc. except that they expect a '0' field instead
347 of the normal type code. */
348
349#define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
350#define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
08394eef 351#define X0UINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtuint)
ef178af3
ZW		 352#define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
353#define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
354#define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
355#define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
356#define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
357#define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
358#define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
359#define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
eab5c70a 360#define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
173b24b9 361#define X0MEMATTR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtmem)
0dfa1860 362
83ab3839
RH		 363#define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
364#define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
770ae6cc 365#define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
83ab3839
RH		 366#define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
367#define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
368#define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
369#define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
370#define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
371#define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
372#define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
373#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
eab5c70a 374#define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
83ab3839
RH		 375
376#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
377#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
378
379#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
6f29feb1
JW		 380\f
381/* ACCESS MACROS for particular fields of insns. */
382
4e872036
AS		 383/* Determines whether X is an insn. */
384#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
385
6f29feb1
JW		 386/* Holds a unique number for each insn.
387 These are not necessarily sequentially increasing. */
8f985ec4 388#define INSN_UID(INSN) XINT(INSN, 0)
6f29feb1
JW		 389
390/* Chain insns together in sequence. */
8f985ec4
ZW		 391#define PREV_INSN(INSN) XEXP(INSN, 1)
392#define NEXT_INSN(INSN) XEXP(INSN, 2)
6f29feb1
JW		 393
394/* The body of an insn. */
8f985ec4 395#define PATTERN(INSN) XEXP(INSN, 3)
6f29feb1
JW		 396
397/* Code number of instruction, from when it was recognized.
398 -1 means this instruction has not been recognized yet. */
8f985ec4 399#define INSN_CODE(INSN) XINT(INSN, 4)
6f29feb1
JW		 400
401/* Set up in flow.c; empty before then.
402 Holds a chain of INSN_LIST rtx's whose first operands point at
403 previous insns with direct data-flow connections to this one.
404 That means that those insns set variables whose next use is in this insn.
405 They are always in the same basic block as this insn. */
8f985ec4 406#define LOG_LINKS(INSN) XEXP(INSN, 5)
6f29feb1
JW		 407
408/* 1 if insn has been deleted. */
409#define INSN_DELETED_P(INSN) ((INSN)->volatil)
410
24a28584
JH		 411/* 1 if insn is a call to a const or pure function. */
412#define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging)
6f29feb1 413
0a1c58a2
JL		 414/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
415#define SIBLING_CALL_P(INSN) ((INSN)->jump)
416
6f29feb1
JW		 417/* 1 if insn is a branch that should not unconditionally execute its
418 delay slots, i.e., it is an annulled branch. */
419#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
420
b53978a3
JO		 421/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
422#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
423
6f29feb1 424/* 1 if insn is in a delay slot and is from the target of the branch. If
6dc42e49 425 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
6f29feb1
JW		 426 executed if the branch is taken. For annulled branches with this bit
427 clear, the insn should be executed only if the branch is not taken. */
428#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
429
f590cca1
RH		 430#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
431
432#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
433
6f29feb1 434/* Holds a list of notes on what this insn does to various REGs.
f590cca1
RH		 435 It is a chain of EXPR_LIST rtx's, where the second operand is the
436 chain pointer and the first operand is the REG being described.
6f29feb1 437 The mode field of the EXPR_LIST contains not a real machine mode
f590cca1 438 but a value from enum reg_note. */
6f29feb1 439
8f985ec4 440#define REG_NOTES(INSN) XEXP(INSN, 6)
6f29feb1
JW		 441
442/* Don't forget to change reg_note_name in rtl.c. */
f590cca1
RH		 443enum reg_note
444{
445 /* The value in REG dies in this insn (i.e., it is not needed past
446 this insn). If REG is set in this insn, the REG_DEAD note may,
447 but need not, be omitted. */
448 REG_DEAD = 1,
449
450 /* The REG is autoincremented or autodecremented. */
451 REG_INC,
452
453 /* Describes the insn as a whole; it says that the insn sets a register
454 to a constant value or to be equivalent to a memory address. If the
455 register is spilled to the stack then the constant value should be
456 substituted for it. The contents of the REG_EQUIV is the constant
457 value or memory address, which may be different from the source of
458 the SET although it has the same value. A REG_EQUIV note may also
459 appear on an insn which copies a register parameter to a pseudo-register,
460 if there is a memory address which could be used to hold that
461 pseudo-register throughout the function. */
be1bb652 462 REG_EQUIV,
f590cca1
RH		 463
464 /* Like REG_EQUIV except that the destination is only momentarily equal
465 to the specified rtx. Therefore, it cannot be used for substitution;
466 but it can be used for cse. */
467 REG_EQUAL,
468
469 /* The register set in this insn held 0 before the insn. The contents of
470 the note is the insn that stored the 0. If that insn is deleted or
471 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
472 is actually an INSN_LIST, not an EXPR_LIST. */
473 REG_WAS_0,
474
475 /* This insn copies the return-value of a library call out of the hard reg
476 for return values. This note is actually an INSN_LIST and it points to
477 the first insn involved in setting up arguments for the call. flow.c
478 uses this to delete the entire library call when its result is dead. */
479 REG_RETVAL,
480
481 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
be1bb652
RH		 482 and points at the one that has the REG_RETVAL. This note is also an
483 INSN_LIST. */
f590cca1
RH		 484 REG_LIBCALL,
485
486 /* The register is always nonnegative during the containing loop. This is
487 used in branches so that decrement and branch instructions terminating
488 on zero can be matched. There must be an insn pattern in the md file
489 named `decrement_and_branch_until_zero' or else this will never be added
490 to any instructions. */
491 REG_NONNEG,
492
493 /* There is no conflict *after this insn* between the register in the note
494 and the destination of this insn. */
495 REG_NO_CONFLICT,
496
497 /* Identifies a register set in this insn and never used. */
498 REG_UNUSED,
499
500 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
501 respectively. Normally, these are required to be consecutive insns, but
502 we permit putting a cc0-setting insn in the delay slot of a branch as
503 long as only one copy of the insn exists. In that case, these notes
504 point from one to the other to allow code generation to determine what
be1bb652
RH		 505 any require information and to properly update CC_STATUS. These notes
506 are INSN_LISTs. */
f590cca1
RH		 507 REG_CC_SETTER, REG_CC_USER,
508
509 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
be1bb652
RH		 510 CODE_LABEL contained in the REG_LABEL note is used by the insn.
511 This note is an INSN_LIST. */
f590cca1
RH		 512 REG_LABEL,
513
514 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
515 write-after-read and write-after-write dependencies respectively.
516 Data dependencies, which are the only type of LOG_LINK created by
517 flow, are represented by a 0 reg note kind. */
518 REG_DEP_ANTI, REG_DEP_OUTPUT,
519
4db384c9
JH		 520 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
521 It has an integer value. For jumps, it is the probability that this is a
522 taken branch. For calls, it is the probability that this call won't
523 return. */
f590cca1
RH		 524 REG_BR_PROB,
525
526 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
527 the first insn after each CALL_INSN. It indicates how many times this
528 block was executed. */
529 REG_EXEC_COUNT,
530
531 /* Attached to a call insn; indicates that the call is malloc-like and
532 that the pointer returned cannot alias anything else. */
533 REG_NOALIAS,
534
535 /* Used to optimize rtl generated by dynamic stack allocations for targets
536 where SETJMP_VIA_SAVE_AREA is true. */
537 REG_SAVE_AREA,
538
4db384c9
JH		 539 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
540 CONCAT of two integer value. First specifies the branch predictor
541 that added the note, second specifies the predicted hitrate of branch
542 in the same format as REG_BR_PROB note uses. */
f590cca1
RH		 543 REG_BR_PRED,
544
545 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
546 for DWARF to interpret what they imply. The attached rtx is used
547 instead of intuition. */
548 REG_FRAME_RELATED_EXPR,
549
550 /* Indicates that REG holds the exception context for the function.
551 This context is shared by inline functions, so the code to acquire
552 the real exception context is delayed until after inlining. */
553 REG_EH_CONTEXT,
554
555 /* Indicates what exception region an INSN belongs in. This is used to
556 indicate what region to which a call may throw. REGION 0 indicates
557 that a call cannot throw at all. REGION -1 indicates that it cannot
558 throw, nor will it execute a non-local goto. */
559 REG_EH_REGION,
560
f590cca1 561 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
8cd8f856
GK		 562 REG_SAVE_NOTE,
563
564 /* Indicates that this insn (which is part of the prologue) computes
565 a value which might not be used later, and if so it's OK to delete
566 the insn. Normally, deleting any insn in the prologue is an error.
567 At present the parameter is unused and set to (const_int 0). */
ca3920ad
JW		 568 REG_MAYBE_DEAD,
569
570 /* Indicates that a call does not return. */
4b01bd16
RH		 571 REG_NORETURN,
572
573 /* Indicates that an indirect jump is a non-local goto instead of a
574 computed goto. */
570a98eb
JH		 575 REG_NON_LOCAL_GOTO,
576
577 /* This kind of note is generated at each to `setjmp',
578 and similar functions that can return twice. */
9d98f8f9
JH		 579 REG_SETJMP,
580
581 /* Indicate calls that always returns. */
582 REG_ALWAYS_RETURN
f590cca1
RH		 583};
584
7ae21caf
DE		 585/* The base value for branch probability notes. */
586#define REG_BR_PROB_BASE 10000
6f29feb1
JW		 587
588/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
589#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
590#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
591
592/* Names for REG_NOTE's in EXPR_LIST insn's. */
593
1f9a015e 594extern const char * const reg_note_name[];
0f41302f 595#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
6f29feb1 596
e51c6661
RK		 597/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
598 USE and CLOBBER expressions.
599 USE expressions list the registers filled with arguments that
600 are passed to the function.
601 CLOBBER expressions document the registers explicitly clobbered
602 by this CALL_INSN.
603 Pseudo registers can not be mentioned in this list. */
8f985ec4 604#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
e51c6661 605
6f29feb1
JW		 606/* The label-number of a code-label. The assembler label
607 is made from `L' and the label-number printed in decimal.
608 Label numbers are unique in a compilation. */
be1bb652 609#define CODE_LABEL_NUMBER(INSN) XINT(INSN, 5)
6f29feb1
JW		 610
611#define LINE_NUMBER NOTE
612
0dfa1860
MM		 613/* In a NOTE that is a line number, this is a string for the file name that the
614 line is in. We use the same field to record block numbers temporarily in
615 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
616 between ints and pointers if we use a different macro for the block number.)
617 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
4fe9b91c 618 information as an rtx in the field. */
6f29feb1 619
83ab3839 620#define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
1a4450c7 621#define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
83ab3839
RH		 622#define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
623#define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
624#define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
625#define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
994a57cd 626#define NOTE_EXPECTED_VALUE(INSN) XCEXP(INSN, 3, NOTE)
0dfa1860 627
6f29feb1
JW		 628/* In a NOTE that is a line number, this is the line number.
629 Other kinds of NOTEs are identified by negative numbers here. */
83ab3839 630#define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
6f29feb1 631
589ca5cb
MM		 632/* Nonzero if INSN is a note marking the beginning of a basic block. */
633#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
634 (GET_CODE (INSN) == NOTE \
635 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
636
6f29feb1 637/* Codes that appear in the NOTE_LINE_NUMBER field
a31efb86 638 for kinds of notes that are not line numbers.
6f29feb1 639
a31efb86
DE		 640 Notice that we do not try to use zero here for any of
641 the special note codes because sometimes the source line
642 actually can be zero! This happens (for example) when we
643 are generating code for the per-translation-unit constructor
644 and destructor routines for some C++ translation unit.
645
646 If you should change any of the following values, or if you
647 should add a new value here, don't forget to change the
648 note_insn_name array in rtl.c. */
6f29feb1 649
d636c18c
RH		 650enum insn_note
651{
652 /* Keep all of these numbers negative. Adjust as needed. */
653 NOTE_INSN_BIAS = -100,
654
655 /* This note is used to get rid of an insn
656 when it isn't safe to patch the insn out of the chain. */
657 NOTE_INSN_DELETED,
658
659 /* These are used to mark the beginning and end of a lexical block.
660 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
661 NOTE_INSN_BLOCK_BEG,
662 NOTE_INSN_BLOCK_END,
663
664 /* These mark the extremes of a loop. */
665 NOTE_INSN_LOOP_BEG,
666 NOTE_INSN_LOOP_END,
667
668 /* Generated at the place in a loop that `continue' jumps to. */
669 NOTE_INSN_LOOP_CONT,
670 /* Generated at the start of a duplicated exit test. */
671 NOTE_INSN_LOOP_VTOP,
672
673 /* This kind of note is generated at the end of the function body,
674 just before the return insn or return label. In an optimizing
675 compilation it is deleted by the first jump optimization, after
676 enabling that optimizer to determine whether control can fall
677 off the end of the function body without a return statement. */
678 NOTE_INSN_FUNCTION_END,
679
d636c18c
RH		 680 /* This marks the point immediately after the last prologue insn. */
681 NOTE_INSN_PROLOGUE_END,
682
683 /* This marks the point immediately prior to the first epilogue insn. */
684 NOTE_INSN_EPILOGUE_BEG,
685
686 /* Generated in place of user-declared labels when they are deleted. */
687 NOTE_INSN_DELETED_LABEL,
688
689 /* This note indicates the start of the real body of the function,
690 i.e. the point just after all of the parms have been moved into
691 their homes, etc. */
692 NOTE_INSN_FUNCTION_BEG,
693
694 /* These note where exception handling regions begin and end.
695 Uses NOTE_EH_HANDLER to identify the region in question. */
696 NOTE_INSN_EH_REGION_BEG,
697 NOTE_INSN_EH_REGION_END,
698
699 /* Generated whenever a duplicate line number note is output. For example,
700 one is output after the end of an inline function, in order to prevent
701 the line containing the inline call from being counted twice in gcov. */
b3b42a4d 702 NOTE_INSN_REPEATED_LINE_NUMBER,
d636c18c
RH		 703
704 /* Start/end of a live range region, where pseudos allocated on the stack
705 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
b3b42a4d 706 NOTE_INSN_RANGE_BEG,
d636c18c
RH		 707 NOTE_INSN_RANGE_END,
708
709 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
710 NOTE_INSN_LIVE,
711
712 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
713 NOTE_INSN_BASIC_BLOCK,
714
994a57cd
RH		 715 /* Record the expected value of a register at a location. Uses
716 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
717 NOTE_INSN_EXPECTED_VALUE,
718
d636c18c
RH		 719 NOTE_INSN_MAX
720};
10f07067 721
6f29feb1
JW		 722/* Names for NOTE insn's other than line numbers. */
723
d636c18c
RH		 724extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
725#define GET_NOTE_INSN_NAME(NOTE_CODE) \
dbbbbf3b 726 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
6f29feb1
JW		 727
728/* The name of a label, in case it corresponds to an explicit label
729 in the input source code. */
be1bb652 730#define LABEL_NAME(RTX) XCSTR(RTX, 6, CODE_LABEL)
6f29feb1
JW		 731
732/* In jump.c, each label contains a count of the number
733 of LABEL_REFs that point at it, so unused labels can be deleted. */
be1bb652 734#define LABEL_NUSES(RTX) XCINT(RTX, 3, CODE_LABEL)
6f29feb1 735
8cd0faaf
CM		 736/* Associate a name with a CODE_LABEL. */
737#define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
738
e9a25f70 739/* The original regno this ADDRESSOF was built for. */
770ae6cc 740#define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
e9a25f70
JL		 741
742/* The variable in the register we took the address of. */
83ab3839 743#define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
e9a25f70 744
6f29feb1
JW		 745/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
746 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
747 be decremented and possibly the label can be deleted. */
83ab3839 748#define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
6f29feb1
JW		 749
750/* Once basic blocks are found in flow.c,
751 each CODE_LABEL starts a chain that goes through
752 all the LABEL_REFs that jump to that label.
be1bb652
RH		 753 The chain eventually winds up at the CODE_LABEL: it is circular. */
754#define LABEL_REFS(LABEL) XCEXP(LABEL, 4, CODE_LABEL)
6f29feb1
JW		 755\f
756/* This is the field in the LABEL_REF through which the circular chain
757 of references to a particular label is linked.
758 This chain is set up in flow.c. */
759
83ab3839 760#define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
6f29feb1
JW		 761
762/* Once basic blocks are found in flow.c,
763 Each LABEL_REF points to its containing instruction with this field. */
764
83ab3839 765#define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
6f29feb1 766
08394eef
BS		 767/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
768 the number the register originally had; for a pseudo register turned into
769 a hard reg this will hold the old pseudo register number. */
6f29feb1 770
770ae6cc 771#define REGNO(RTX) XCUINT(RTX, 0, REG)
08394eef 772#define ORIGINAL_REGNO(RTX) X0UINT(RTX, 1)
6f29feb1
JW		 773
774/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
775 is the current function's return value. */
776
777#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
778
779/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
780#define REG_USERVAR_P(RTX) ((RTX)->volatil)
781
3502dc9c
JDA		 782/* 1 in a REG rtx if the register is a pointer. */
783#define REG_POINTER(RTX) ((RTX)->frame_related)
784
cdbca172
JO		 785/* 1 if the given register REG corresponds to a hard register. */
786#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
787
788/* 1 if the given register number REG_NO corresponds to a hard register. */
789#define HARD_REGISTER_NUM_P(REG_NO) (REG_NO < FIRST_PSEUDO_REGISTER)
790
6f29feb1
JW		 791/* For a CONST_INT rtx, INTVAL extracts the integer. */
792
83ab3839 793#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
6f29feb1 794
a36556a8
ZW		 795/* For a CONST_DOUBLE:
796 The usual two ints that hold the value.
797 For a DImode, that is all there are;
798 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
799 For a float, the number of ints varies,
800 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
801 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
802#define CONST_DOUBLE_LOW(r) XCWINT (r, 2, CONST_DOUBLE)
803#define CONST_DOUBLE_HIGH(r) XCWINT (r, 3, CONST_DOUBLE)
804
805/* Link for chain of all CONST_DOUBLEs in use in current function. */
806#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 1, CONST_DOUBLE)
807/* The MEM which represents this CONST_DOUBLE's value in memory,
808 or const0_rtx if no MEM has been made for it yet,
809 or cc0_rtx if it is not on the chain. */
810#define CONST_DOUBLE_MEM(r) XCEXP (r, 0, CONST_DOUBLE)
811
6f29feb1 812/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
ddef6bc7 813 SUBREG_BYTE extracts the byte-number. */
6f29feb1 814
83ab3839 815#define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
ddef6bc7
JJ		 816#define SUBREG_BYTE(RTX) XCUINT(RTX, 1, SUBREG)
817
818/* in rtlanal.c */
819extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
820 enum machine_mode,
821 unsigned int,
822 enum machine_mode));
823extern unsigned int subreg_regno PARAMS ((rtx));
6f29feb1 824
07be3989
RK		 825/* 1 if the REG contained in SUBREG_REG is already known to be
826 sign- or zero-extended from the mode of the SUBREG to the mode of
827 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
f590cca1 828 extension.
07be3989
RK		 829
830 When used as a LHS, is means that this extension must be done
831 when assigning to SUBREG_REG. */
832
833#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
834#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
835
6f29feb1
JW		 836/* Access various components of an ASM_OPERANDS rtx. */
837
83ab3839
RH		 838#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
839#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
840#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
841#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
842#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
843#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
844#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
6462bb43
AO		 845#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
846 XCVECEXP ((RTX), 4, (N), ASM_OPERANDS)
3bdf5ad1
RK		 847#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
848 XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
849#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
850 GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
83ab3839
RH		 851#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
852#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
6f29feb1
JW		 853
854/* For a MEM rtx, 1 if it's a volatile reference.
855 Also in an ASM_OPERANDS rtx. */
856#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
857
3bdf5ad1
RK		 858/* For a MEM rtx, 1 if it refers to an aggregate, either to the
859 aggregate itself of to a field of the aggregate. If zero, RTX may
4eb00163 860 or may not be such a reference. */
6f29feb1
JW		 861#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
862
c6df88cb
MM		 863/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
864 not refer to a scalar.*/
865#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
866
c6df88cb
MM		 867/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
868 RTX. Otherwise, vice versa. Use this macro only when you are
869 *sure* that you know that the MEM is in a structure, or is a
870 scalar. VAL is evaluated only once. */
f9e158c3
JM		 871#define MEM_SET_IN_STRUCT_P(RTX, VAL) do { \
872 if (VAL) \
873 { \
874 MEM_IN_STRUCT_P (RTX) = 1; \
875 MEM_SCALAR_P (RTX) = 0; \
876 } \
877 else \
878 { \
879 MEM_IN_STRUCT_P (RTX) = 0; \
880 MEM_SCALAR_P (RTX) = 1; \
881 } \
882} while (0)
c6df88cb 883
173b24b9
RK		 884/* The memory attribute block. We provide access macros for each value
885 in the block and provide defaults if none specified. */
886#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
887
41472af8
MM		 888/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
889 set, and may alias anything. Otherwise, the MEM can only alias
890 MEMs in the same alias set. This value is set in a
891 language-dependent manner in the front-end, and should not be
892 altered in the back-end. These set numbers are tested for zero,
893 and compared for equality; they have no other significance. In
894 some front-ends, these numbers may correspond in some way to types,
895 or other language-level entities, but they need not, and the
896 back-end makes no such assumptions. */
173b24b9
RK		 897#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
898
899/* For a MEM rtx, the decl it is known to refer to, if it is known to
900 refer to part of a DECL. */
901#define MEM_DECL(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->decl)
902
903/* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
904 RTX that is always a CONST_INT. */
905#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
906
907/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
908 is always a CONST_INT. */
909#define MEM_SIZE(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->size)
910
911/* For a MEM rtx, the alignment in bytes. */
912#define MEM_ALIGN(RTX) (MEM_ATTRS (RTX) == 0 ? 1 : MEM_ATTRS (RTX)->align)
3bdf5ad1
RK		 913
914/* Copy the attributes that apply to memory locations from RHS to LHS. */
915#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
916 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
917 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
918 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
173b24b9
RK		 919 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
920 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
41472af8 921
6f29feb1
JW		 922/* For a LABEL_REF, 1 means that this reference is to a label outside the
923 loop containing the reference. */
924#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
925
adfaf10a 926/* For a LABEL_REF, 1 means it is for a nonlocal label. */
2a406d2a 927/* Likewise in an EXPR_LIST for a REG_LABEL note. */
adfaf10a
RS		 928#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
929
6f29feb1
JW		 930/* For a CODE_LABEL, 1 means always consider this label to be needed. */
931#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
932
933/* For a REG, 1 means the register is used only in an exit test of a loop. */
934#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
935
936/* During sched, for an insn, 1 means that the insn must be scheduled together
d45cf215 937 with the preceding insn. */
6f29feb1
JW		 938#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
939
b8ec5764
VM		 940/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
941 cost of the dependence link. The cost of executing an instruction
942 may vary based on how the results are used. LINK_COST_ZERO is 1 when
943 the cost through the link varies and is unchanged (i.e., the link has
944 zero additional cost). LINK_COST_FREE is 1 when the cost through the
945 link is zero (i.e., the link makes the cost free). In other cases,
946 the adjustment to the cost is recomputed each time it is needed. */
947#define LINK_COST_ZERO(X) ((X)->jump)
948#define LINK_COST_FREE(X) ((X)->call)
949
6f29feb1
JW		 950/* For a SET rtx, SET_DEST is the place that is set
951 and SET_SRC is the value it is set to. */
83ab3839
RH		 952#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
953#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
6f29feb1
JW		 954
955/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
83ab3839
RH		 956#define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
957#define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
6f29feb1 958
0c99ec5c
RH		 959/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
960 conditionally executing the code on, COND_EXEC_CODE is the code
961 to execute if the condition is true. */
962#define COND_EXEC_TEST(RTX) XCEXP(RTX, 0, COND_EXEC)
963#define COND_EXEC_CODE(RTX) XCEXP(RTX, 1, COND_EXEC)
964
6f29feb1
JW		 965/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
966#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
967
bd7cf17e
JJ		 968/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
969#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
970
6f29feb1
JW		 971/* Flag in a SYMBOL_REF for machine-specific purposes. */
972#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
973
974/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
975#define SYMBOL_REF_USED(RTX) ((RTX)->used)
976
ff0b6b99
FS		 977/* 1 means a SYMBOL_REF is weak. */
978#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
979
6f29feb1
JW		 980/* Define a macro to look for REG_INC notes,
981 but save time on machines where they never exist. */
982
58e54c44
RS		 983/* Don't continue this line--convex cc version 4.1 would lose. */
984#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
e75ecd26
HPN		 985#define FIND_REG_INC_NOTE(insn, reg) \
986 (reg != NULL_RTX && REG_P ((rtx) (reg)) \
987 ? find_regno_note ((insn), REG_INC, REGNO ((rtx) (reg))) \
988 : find_reg_note ((insn), REG_INC, (reg)))
6f29feb1
JW		 989#else
990#define FIND_REG_INC_NOTE(insn, reg) 0
991#endif
992
993/* Indicate whether the machine has any sort of auto increment addressing.
994 If not, we can avoid checking for REG_INC notes. */
995
58e54c44
RS		 996/* Don't continue this line--convex cc version 4.1 would lose. */
997#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 998#define AUTO_INC_DEC
999#endif
0dfa1860 1000
940da324
JL		 1001#ifndef HAVE_PRE_INCREMENT
1002#define HAVE_PRE_INCREMENT 0
1003#endif
1004
1005#ifndef HAVE_PRE_DECREMENT
1006#define HAVE_PRE_DECREMENT 0
1007#endif
1008
1009#ifndef HAVE_POST_INCREMENT
1010#define HAVE_POST_INCREMENT 0
1011#endif
1012
1013#ifndef HAVE_POST_DECREMENT
1014#define HAVE_POST_DECREMENT 0
1015#endif
1016
4b983fdc
RH		 1017#ifndef HAVE_POST_MODIFY_DISP
1018#define HAVE_POST_MODIFY_DISP 0
1019#endif
1020
1021#ifndef HAVE_POST_MODIFY_REG
1022#define HAVE_POST_MODIFY_REG 0
1023#endif
1024
1025#ifndef HAVE_PRE_MODIFY_DISP
1026#define HAVE_PRE_MODIFY_DISP 0
1027#endif
1028
1029#ifndef HAVE_PRE_MODIFY_REG
1030#define HAVE_PRE_MODIFY_REG 0
1031#endif
1032
6e01bd94
MH		 1033
1034/* Some architectures do not have complete pre/post increment/decrement
1035 instruction sets, or only move some modes efficiently. These macros
1036 allow us to tune autoincrement generation. */
1037
1038#ifndef USE_LOAD_POST_INCREMENT
1039#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1040#endif
1041
1042#ifndef USE_LOAD_POST_DECREMENT
1043#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1044#endif
1045
1046#ifndef USE_LOAD_PRE_INCREMENT
1047#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1048#endif
1049
1050#ifndef USE_LOAD_PRE_DECREMENT
1051#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1052#endif
1053
1054#ifndef USE_STORE_POST_INCREMENT
1055#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1056#endif
1057
1058#ifndef USE_STORE_POST_DECREMENT
1059#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1060#endif
1061
1062#ifndef USE_STORE_PRE_INCREMENT
1063#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1064#endif
1065
1066#ifndef USE_STORE_PRE_DECREMENT
1067#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1068#endif
1069
1070
0dfa1860
MM		 1071/* Accessors for RANGE_INFO. */
1072/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1073#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
0dfa1860
MM		 1074
1075/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1076#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
0dfa1860
MM		 1077
1078/* For RANGE_{START,END} notes, return the vector containing the registers used
1079 in the range. */
83ab3839
RH		 1080#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1081#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1082#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
0dfa1860
MM		 1083
1084/* For RANGE_{START,END} notes, the number of calls within the range. */
83ab3839 1085#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
0dfa1860
MM		 1086
1087/* For RANGE_{START,END} notes, the number of insns within the range. */
83ab3839 1088#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
0dfa1860
MM		 1089
1090/* For RANGE_{START,END} notes, a unique # to identify this range. */
83ab3839 1091#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
0dfa1860
MM		 1092
1093/* For RANGE_{START,END} notes, the basic block # the range starts with. */
83ab3839 1094#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
0dfa1860
MM		 1095
1096/* For RANGE_{START,END} notes, the basic block # the range ends with. */
83ab3839 1097#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
0dfa1860
MM		 1098
1099/* For RANGE_{START,END} notes, the loop depth the range is in. */
83ab3839 1100#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
0dfa1860
MM		 1101
1102/* For RANGE_{START,END} notes, the bitmap of live registers at the start
1103 of the range. */
83ab3839 1104#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
0dfa1860
MM		 1105
1106/* For RANGE_{START,END} notes, the bitmap of live registers at the end
1107 of the range. */
83ab3839 1108#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
0dfa1860
MM		 1109
1110/* For RANGE_START notes, the marker # of the start of the range. */
83ab3839 1111#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
0dfa1860
MM		 1112
1113/* For RANGE_START notes, the marker # of the end of the range. */
83ab3839 1114#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
0dfa1860
MM		 1115
1116/* Original pseudo register # for a live range note. */
83ab3839 1117#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
0dfa1860
MM		 1118
1119/* Pseudo register # original register is copied into or -1. */
83ab3839 1120#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
0dfa1860
MM		 1121
1122/* How many times a register in a live range note was referenced. */
83ab3839 1123#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
0dfa1860
MM		 1124
1125/* How many times a register in a live range note was set. */
83ab3839 1126#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
0dfa1860
MM		 1127
1128/* How many times a register in a live range note died. */
83ab3839 1129#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
0dfa1860
MM		 1130
1131/* Whether the original value is needed to be copied into the range register at
1132 the start of the range. */
83ab3839 1133#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
0dfa1860
MM		 1134
1135/* # of insns the register copy is live over. */
83ab3839 1136#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
0dfa1860
MM		 1137
1138/* # of calls the register copy is live over. */
83ab3839 1139#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
0dfa1860
MM		 1140
1141/* DECL_NODE pointer of the declaration if the register is a user defined
1142 variable. */
83ab3839 1143#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
0dfa1860
MM		 1144
1145/* BLOCK_NODE pointer to the block the variable is declared in if the
1146 register is a user defined variable. */
83ab3839 1147#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
0dfa1860
MM		 1148
1149/* EXPR_LIST of the distinct ranges a variable is in. */
1150#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1151
1152/* Block a variable is declared in. */
1153#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1154
1155/* # of distinct ranges a variable is in. */
1156#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1157
1158/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1159#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1160
1161/* For a NOTE_INSN_LIVE note, the original basic block number. */
1162#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
4e872036
AS		 1163
1164/* Determine if the insn is a PHI node. */
1165#define PHI_NODE_P(X) \
1166 (X && GET_CODE (X) == INSN \
1167 && GET_CODE (PATTERN (X)) == SET \
1168 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
6f29feb1 1169\f
bf6bb899
BS		 1170/* Nonzero if we need to distinguish between the return value of this function
1171 and the return value of a function called by this function. This helps
1172 integrate.c.
1173 This is 1 until after the rtl generation pass. */
1174extern int rtx_equal_function_value_matters;
1175
1b3d8f8a
GK		 1176/* Nonzero when we are generating CONCATs. */
1177extern int generating_concat_p;
1178
6f29feb1
JW		 1179/* Generally useful functions. */
1180
ac957f13 1181/* In expmed.c */
cdadb1dd 1182extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
5f4f0e22
CH		 1183
1184#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1185
5f2d6cfa 1186/* In builtins.c */
2f78c311 1187extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx));
5f2d6cfa 1188
50b2596f 1189/* In explow.c */
c6991660 1190extern void set_stack_check_libfunc PARAMS ((rtx));
cdadb1dd 1191extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
7e4ce834 1192 enum machine_mode));
cdadb1dd
KG		 1193extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1194extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1195extern void optimize_save_area_alloca PARAMS ((rtx));
5f4f0e22 1196
4eb00163 1197/* In emit-rtl.c */
cdadb1dd 1198extern rtx gen_rtx PARAMS ((enum rtx_code,
bdea67fa 1199 enum machine_mode, ...));
cdadb1dd 1200extern rtvec gen_rtvec PARAMS ((int, ...));
cdadb1dd
KG		 1201extern rtx copy_insn_1 PARAMS ((rtx));
1202extern rtx copy_insn PARAMS ((rtx));
4eb00163
JO		 1203
1204/* In rtl.c */
5fe2e41b
GK		 1205extern rtx rtx_alloc PARAMS ((RTX_CODE));
1206extern rtvec rtvec_alloc PARAMS ((int));
cdadb1dd 1207extern rtx copy_rtx PARAMS ((rtx));
4eb00163
JO		 1208
1209/* In emit-rtl.c */
cdadb1dd 1210extern rtx copy_rtx_if_shared PARAMS ((rtx));
4eb00163
JO		 1211
1212/* In rtl.c */
cdadb1dd
KG		 1213extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1214extern rtx shallow_copy_rtx PARAMS ((rtx));
1215extern int rtx_equal_p PARAMS ((rtx, rtx));
4eb00163
JO		 1216
1217/* In emit-rtl.c */
cdadb1dd
KG		 1218extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1219extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1220extern rtx gen_label_rtx PARAMS ((void));
ddef6bc7 1221extern int subreg_hard_regno PARAMS ((rtx, int));
cdadb1dd
KG		 1222extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1223extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1224
1225/* In cse.c */
cdadb1dd 1226extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1227
1228/* In emit-rtl.c */
cdadb1dd 1229extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
5222e470
JH		 1230extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1231 enum machine_mode, rtx));
cdadb1dd
KG		 1232extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1233extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
770ae6cc
RK		 1234extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1235 enum machine_mode));
ddef6bc7
JJ		 1236extern rtx constant_subword PARAMS ((rtx, int,
1237 enum machine_mode));
4eb00163
JO		 1238
1239/* In emit-rtl.c */
770ae6cc
RK		 1240extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1241 enum machine_mode));
cdadb1dd 1242extern int subreg_lowpart_p PARAMS ((rtx));
e0e08ac2
JH		 1243extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1244 enum machine_mode));
1245extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1246 enum machine_mode));
cdadb1dd
KG		 1247extern rtx make_safe_from PARAMS ((rtx, rtx));
1248extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
cdadb1dd
KG		 1249extern rtx get_insns PARAMS ((void));
1250extern const char *get_insn_name PARAMS ((int));
1251extern rtx get_last_insn PARAMS ((void));
1252extern rtx get_last_insn_anywhere PARAMS ((void));
1253extern void start_sequence PARAMS ((void));
1254extern void push_to_sequence PARAMS ((rtx));
1255extern void end_sequence PARAMS ((void));
c14f7160
ML		 1256extern void push_to_full_sequence PARAMS ((rtx, rtx));
1257extern void end_full_sequence PARAMS ((rtx*, rtx*));
cdadb1dd 1258extern rtx gen_sequence PARAMS ((void));
4eb00163
JO		 1259
1260/* In varasm.c */
cdadb1dd
KG		 1261extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1262extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
4eb00163 1263
4eb00163 1264/* In varasm.c */
cdadb1dd
KG		 1265extern rtx get_pool_constant PARAMS ((rtx));
1266extern enum machine_mode get_pool_mode PARAMS ((rtx));
1267extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1268extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1269extern int get_pool_offset PARAMS ((rtx));
1270extern rtx simplify_subtraction PARAMS ((rtx));
4eb00163
JO		 1271
1272/* In function.c */
cdadb1dd 1273extern rtx assign_stack_local PARAMS ((enum machine_mode,
e5e809f4 1274 HOST_WIDE_INT, int));
cdadb1dd 1275extern rtx assign_stack_temp PARAMS ((enum machine_mode,
e5e809f4 1276 HOST_WIDE_INT, int));
2f78c311 1277extern rtx assign_temp PARAMS ((tree, int, int, int));
4eb00163 1278/* In emit-rtl.c */
cdadb1dd
KG		 1279extern rtx emit_insn_before PARAMS ((rtx, rtx));
1280extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1281extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1282extern rtx emit_barrier_before PARAMS ((rtx));
1283extern rtx emit_label_before PARAMS ((rtx, rtx));
1284extern rtx emit_note_before PARAMS ((int, rtx));
1285extern rtx emit_insn_after PARAMS ((rtx, rtx));
1286extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1287extern rtx emit_barrier_after PARAMS ((rtx));
1288extern rtx emit_label_after PARAMS ((rtx, rtx));
1289extern rtx emit_note_after PARAMS ((int, rtx));
3cce094d 1290extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
cdadb1dd
KG		 1291extern rtx emit_insn PARAMS ((rtx));
1292extern rtx emit_insns PARAMS ((rtx));
1293extern rtx emit_insns_before PARAMS ((rtx, rtx));
1294extern rtx emit_insns_after PARAMS ((rtx, rtx));
1295extern rtx emit_jump_insn PARAMS ((rtx));
1296extern rtx emit_call_insn PARAMS ((rtx));
1297extern rtx emit_label PARAMS ((rtx));
1298extern rtx emit_barrier PARAMS ((void));
3cce094d
KG		 1299extern rtx emit_line_note PARAMS ((const char *, int));
1300extern rtx emit_note PARAMS ((const char *, int));
1301extern rtx emit_line_note_force PARAMS ((const char *, int));
cdadb1dd
KG		 1302extern rtx make_insn_raw PARAMS ((rtx));
1303extern rtx previous_insn PARAMS ((rtx));
1304extern rtx next_insn PARAMS ((rtx));
1305extern rtx prev_nonnote_insn PARAMS ((rtx));
1306extern rtx next_nonnote_insn PARAMS ((rtx));
1307extern rtx prev_real_insn PARAMS ((rtx));
1308extern rtx next_real_insn PARAMS ((rtx));
1309extern rtx prev_active_insn PARAMS ((rtx));
1310extern rtx next_active_insn PARAMS ((rtx));
69732dcb 1311extern int active_insn_p PARAMS ((rtx));
cdadb1dd
KG		 1312extern rtx prev_label PARAMS ((rtx));
1313extern rtx next_label PARAMS ((rtx));
1314extern rtx next_cc0_user PARAMS ((rtx));
1315extern rtx prev_cc0_setter PARAMS ((rtx));
4eb00163
JO		 1316
1317/* In jump.c */
cdadb1dd
KG		 1318extern rtx next_nondeleted_insn PARAMS ((rtx));
1319extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
7913f3d0 1320extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
cdadb1dd
KG		 1321extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1322extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1323extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1e5fd094 1324extern void mark_jump_label PARAMS ((rtx, rtx, int));
01f62f01 1325extern void cleanup_barriers PARAMS ((void));
4eb00163 1326
4eb00163 1327/* In jump.c */
2270623a 1328extern void squeeze_notes PARAMS ((rtx *, rtx *));
53c17031 1329extern rtx delete_related_insns PARAMS ((rtx));
cdadb1dd
KG		 1330extern void delete_jump PARAMS ((rtx));
1331extern void delete_barrier PARAMS ((rtx));
1332extern rtx get_label_before PARAMS ((rtx));
1333extern rtx get_label_after PARAMS ((rtx));
1334extern rtx follow_jumps PARAMS ((rtx));
4eb00163
JO		 1335
1336/* In recog.c */
b72f00af 1337extern rtx *find_constant_term_loc PARAMS ((rtx *));
4eb00163
JO		 1338
1339/* In emit-rtl.c */
cdadb1dd 1340extern rtx try_split PARAMS ((rtx, rtx, int));
6b24c259 1341extern int split_branch_probability;
4eb00163
JO		 1342
1343/* In unknown file */
cdadb1dd 1344extern rtx split_insns PARAMS ((rtx, rtx));
4eb00163
JO		 1345
1346/* In simplify-rtx.c */
d9c695ff
RK		 1347extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1348 enum machine_mode, rtx,
1349 enum machine_mode));
1350extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1351 enum machine_mode, rtx,
1352 rtx));
1353extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1354 enum machine_mode,
1355 enum machine_mode, rtx, rtx,
1356 rtx));
1357extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1358 enum machine_mode, rtx,
1359 rtx));
1360extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1361 enum machine_mode,
1362 rtx, rtx));
1363extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1364 enum machine_mode, rtx,
1365 enum machine_mode));
1366extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1367 enum machine_mode,
1368 enum machine_mode,
1369 rtx, rtx, rtx));
1370extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
141e454b 1371 enum machine_mode,
d9c695ff
RK		 1372 enum machine_mode,
1373 rtx, rtx));
eea50aa0
JH		 1374extern rtx simplify_subreg PARAMS ((enum machine_mode,
1375 rtx,
1376 enum machine_mode,
1377 unsigned int));
949c5d62
JH		 1378extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1379 rtx,
1380 enum machine_mode,
1381 unsigned int));
d9c695ff 1382extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
cdadb1dd 1383extern rtx simplify_rtx PARAMS ((rtx));
732910b9 1384extern rtx avoid_constant_pool_reference PARAMS ((rtx));
4eb00163 1385
4eb00163 1386/* In function.c */
2f78c311 1387extern rtx gen_mem_addressof PARAMS ((rtx, tree));
4eb00163 1388
4eb00163 1389/* In regclass.c */
770ae6cc
RK		 1390extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1391 unsigned int));
4eb00163
JO		 1392
1393/* In emit-rtl.c */
cdadb1dd 1394extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
9ae8ffe7 1395
e9a25f70
JL		 1396/* Functions in rtlanal.c */
1397
b1cdafbb
JH		 1398/* Single set is implemented as macro for performance reasons. */
1399#define single_set(I) (INSN_P (I) \
1400 ? (GET_CODE (PATTERN (I)) == SET \
1401 ? PATTERN (I) : single_set_1 (I)) \
1402 : NULL_RTX)
2130b7fb 1403#define single_set_1(I) single_set_2 (I, PATTERN (I))
b1cdafbb 1404
e38fe8e0 1405extern int rtx_addr_can_trap_p PARAMS ((rtx));
cdadb1dd 1406extern int rtx_unstable_p PARAMS ((rtx));
e38fe8e0
BS		 1407extern int rtx_varies_p PARAMS ((rtx, int));
1408extern int rtx_addr_varies_p PARAMS ((rtx, int));
cdadb1dd
KG		 1409extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1410extern rtx get_related_value PARAMS ((rtx));
1411extern int reg_mentioned_p PARAMS ((rtx, rtx));
4b983fdc 1412extern int count_occurrences PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1413extern int reg_referenced_p PARAMS ((rtx, rtx));
1414extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1415extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1416extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1417extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
9b3bd424 1418extern int commutative_operand_precedence PARAMS ((rtx));
e5c56fd9 1419extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1420extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1421extern int no_labels_between_p PARAMS ((rtx, rtx));
1422extern int no_jumps_between_p PARAMS ((rtx, rtx));
1423extern int modified_in_p PARAMS ((rtx, rtx));
4eb00163 1424extern int insn_dependent_p PARAMS ((rtx, rtx));
cdadb1dd 1425extern int reg_set_p PARAMS ((rtx, rtx));
2130b7fb 1426extern rtx single_set_2 PARAMS ((rtx, rtx));
cdadb1dd 1427extern int multiple_sets PARAMS ((rtx));
7142e318 1428extern int set_noop_p PARAMS ((rtx));
0005550b 1429extern int noop_move_p PARAMS ((rtx));
cdadb1dd 1430extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
770ae6cc
RK		 1431extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1432 rtx, rtx *));
cdadb1dd 1433extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
91b2d119 1434extern rtx set_of PARAMS ((rtx, rtx));
770ae6cc
RK		 1435extern void note_stores PARAMS ((rtx,
1436 void (*) (rtx, rtx, void *),
1437 void *));
e2373f95
RK		 1438extern void note_uses PARAMS ((rtx *,
1439 void (*) (rtx *, void *),
1440 void *));
cdadb1dd
KG		 1441extern rtx reg_set_last PARAMS ((rtx, rtx));
1442extern int dead_or_set_p PARAMS ((rtx, rtx));
770ae6cc 1443extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
cdadb1dd 1444extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
770ae6cc
RK		 1445extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1446 unsigned int));
d9c695ff 1447extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
cdadb1dd 1448extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
770ae6cc
RK		 1449extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1450 unsigned int));
cdadb1dd
KG		 1451extern void remove_note PARAMS ((rtx, rtx));
1452extern int side_effects_p PARAMS ((rtx));
1453extern int volatile_refs_p PARAMS ((rtx));
1454extern int volatile_insn_p PARAMS ((rtx));
1455extern int may_trap_p PARAMS ((rtx));
1456extern int inequality_comparisons_p PARAMS ((rtx));
1457extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
770ae6cc
RK		 1458extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1459 int));
cdadb1dd
KG		 1460extern int computed_jump_p PARAMS ((rtx));
1461typedef int (*rtx_function) PARAMS ((rtx *, void *));
1462extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
770ae6cc 1463extern rtx regno_use_in PARAMS ((unsigned int, rtx));
cdadb1dd
KG		 1464extern int auto_inc_p PARAMS ((rtx));
1465extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1466extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
db7ba742 1467extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
833366d6 1468extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
6f29feb1 1469
ae0b51ef
JL		 1470/* flow.c */
1471
cdadb1dd
KG		 1472extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1473void init_EXPR_INSN_LIST_cache PARAMS ((void));
1474void free_EXPR_LIST_list PARAMS ((rtx *));
1475void free_INSN_LIST_list PARAMS ((rtx *));
1476void free_EXPR_LIST_node PARAMS ((rtx));
1477void free_INSN_LIST_node PARAMS ((rtx));
1478rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1479rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
d9d4fb43 1480void clear_log_links PARAMS ((rtx));
ae0b51ef
JL		 1481
1482/* regclass.c */
1483
6f29feb1
JW		 1484/* Maximum number of parallel sets and clobbers in any insn in this fn.
1485 Always at least 3, since the combiner could put that many togetherm
1486 and we want this to remain correct for all the remaining passes. */
1487
1488extern int max_parallel;
1489
e0c6d139 1490/* Free up register info memory. */
cdadb1dd 1491extern void free_reg_info PARAMS ((void));
e0c6d139 1492
ae0b51ef 1493/* recog.c */
cdadb1dd 1494extern int asm_noperands PARAMS ((rtx));
3cce094d 1495extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
9b3142b3
KG		 1496 const char **,
1497 enum machine_mode *));
6f29feb1 1498
cdadb1dd
KG		 1499extern enum reg_class reg_preferred_class PARAMS ((int));
1500extern enum reg_class reg_alternate_class PARAMS ((int));
6f29feb1 1501
cdadb1dd 1502extern rtx get_first_nonparm_insn PARAMS ((void));
6f29feb1 1503
cdadb1dd 1504extern void split_all_insns PARAMS ((int));
6f862f2f 1505extern void split_all_insns_noflow PARAMS ((void));
6a73406e 1506
68d75312 1507#define MAX_SAVED_CONST_INT 64
5da077de 1508extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
68d75312 1509
5da077de
AS		 1510#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1511#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1512#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1513#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
6f29feb1 1514extern rtx const_true_rtx;
a8efe40d
RK		 1515
1516extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1517
f590cca1 1518/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
a8efe40d
RK		 1519 same as VOIDmode. */
1520
1521#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1522
1523/* Likewise, for the constants 1 and 2. */
1524
1525#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1526#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
6f29feb1 1527
5da077de
AS		 1528/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1529 is used to represent the frame pointer. This is because the
1530 hard frame pointer and the automatic variables are separated by an amount
1531 that cannot be determined until after register allocation. We can assume
1532 that in this case ELIMINABLE_REGS will be defined, one action of which
1533 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1534#ifndef HARD_FRAME_POINTER_REGNUM
1535#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1536#endif
1537
1538/* Index labels for global_rtl. */
1539enum global_rtl_index
68d75312 1540{
5da077de
AS		 1541 GR_PC,
1542 GR_CC0,
1543 GR_STACK_POINTER,
1544 GR_FRAME_POINTER,
1545/* For register elimination to work properly these hard_frame_pointer_rtx,
1546 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1547 the same register. */
1548#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1549 GR_ARG_POINTER = GR_FRAME_POINTER,
1550#endif
1551#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1552 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1553#else
1554 GR_HARD_FRAME_POINTER,
1555#endif
1556#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1557#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1558 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1559#else
1560 GR_ARG_POINTER,
1561#endif
1562#endif
1563 GR_VIRTUAL_INCOMING_ARGS,
1564 GR_VIRTUAL_STACK_ARGS,
1565 GR_VIRTUAL_STACK_DYNAMIC,
1566 GR_VIRTUAL_OUTGOING_ARGS,
1567 GR_VIRTUAL_CFA,
1568
1569 GR_MAX
1570};
1571
1572/* Pointers to standard pieces of rtx are stored here. */
1573extern rtx global_rtl[GR_MAX];
1574
1575/* Standard pieces of rtx, to be substituted directly into things. */
1576#define pc_rtx (global_rtl[GR_PC])
1577#define cc0_rtx (global_rtl[GR_CC0])
68d75312 1578
6f29feb1
JW		 1579/* All references to certain hard regs, except those created
1580 by allocating pseudo regs into them (when that's possible),
1581 go through these unique rtx objects. */
5da077de
AS		 1582#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1583#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1584#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1585#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
68d75312 1586
6f29feb1
JW		 1587extern rtx pic_offset_table_rtx;
1588extern rtx struct_value_rtx;
1589extern rtx struct_value_incoming_rtx;
1590extern rtx static_chain_rtx;
1591extern rtx static_chain_incoming_rtx;
07ebc930 1592extern rtx return_address_pointer_rtx;
3b80f6ca
RH		 1593
1594/* Include the RTL generation functions. */
1595
1596#ifndef NO_GENRTL_H
1597#include "genrtl.h"
1598#endif
1599
41472af8
MM		 1600/* There are some RTL codes that require special attention; the
1601 generation functions included above do the raw handling. If you
b4213325
MM		 1602 add to this list, modify special_rtx in gengenrtl.c as well. You
1603 should also modify gen_rtx to use the special function. */
3b80f6ca 1604
cdadb1dd 1605extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
0133b7d9 1606 HOST_WIDE_INT, HOST_WIDE_INT));
cdadb1dd 1607extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
08394eef 1608extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
cdadb1dd 1609extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
ddef6bc7 1610extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
cdadb1dd 1611extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
3b80f6ca 1612
ddef6bc7
JJ		 1613extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1614
aefdd5ab
JL		 1615/* We need the cast here to ensure that we get the same result both with
1616 and without prototypes. */
1617#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
3b80f6ca 1618
6f29feb1
JW		 1619/* Virtual registers are used during RTL generation to refer to locations into
1620 the stack frame when the actual location isn't known until RTL generation
1621 is complete. The routine instantiate_virtual_regs replaces these with
1622 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1623 a constant. */
1624
1625#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1626
1627/* This points to the first word of the incoming arguments passed on the stack,
1628 either by the caller or by the callee when pretending it was passed by the
1629 caller. */
1630
5da077de 1631#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
6f29feb1
JW		 1632
1633#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1634
60343c3b 1635/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
6f29feb1
JW		 1636 variable on the stack. Otherwise, it points to the first variable on
1637 the stack. */
1638
5da077de 1639#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
6f29feb1
JW		 1640
1641#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1642
1643/* This points to the location of dynamically-allocated memory on the stack
1644 immediately after the stack pointer has been adjusted by the amount
1645 desired. */
1646
5da077de 1647#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
6f29feb1
JW		 1648
1649#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1650
1651/* This points to the location in the stack at which outgoing arguments should
1652 be written when the stack is pre-pushed (arguments pushed using push
1653 insns always use sp). */
1654
5da077de 1655#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
6f29feb1
JW		 1656
1657#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1658
71038426
RH		 1659/* This points to the Canonical Frame Address of the function. This
1660 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1661 but is calculated relative to the arg pointer for simplicity; the
f590cca1 1662 frame pointer nor stack pointer are necessarily fixed relative to
71038426
RH		 1663 the CFA until after reload. */
1664
5da077de 1665#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
71038426
RH		 1666
1667#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1668
1669#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
6f29feb1 1670
848e0190
JH		 1671/* REGNUM never really appearing in the INSN stream. */
1672#define INVALID_REGNUM (~(unsigned int)0)
1673
cdadb1dd 1674extern rtx find_next_ref PARAMS ((rtx, rtx));
f837a861 1675
2f78c311
ZW		 1676extern rtx output_constant_def PARAMS ((tree, int));
1677extern rtx immed_real_const PARAMS ((tree));
6f29feb1
JW		 1678
1679/* Define a default value for STORE_FLAG_VALUE. */
1680
1681#ifndef STORE_FLAG_VALUE
1682#define STORE_FLAG_VALUE 1
1683#endif
1684
0ea0e871
JL		 1685/* Nonzero after the second flow pass has completed.
1686 Set to 1 or 0 by toplev.c */
1687extern int flow2_completed;
1688
6f29feb1 1689/* Nonzero after end of reload pass.
0ea0e871 1690 Set to 1 or 0 by reload1.c. */
6f29feb1
JW		 1691
1692extern int reload_completed;
1693
1694/* Set to 1 while reload_as_needed is operating.
1695 Required by some machines to handle any generated moves differently. */
1696
1697extern int reload_in_progress;
1698
1699/* If this is nonzero, we do not bother generating VOLATILE
1700 around volatile memory references, and we are willing to
1701 output indirect addresses. If cse is to follow, we reject
1702 indirect addresses so a useful potential cse is generated;
1703 if it is used only once, instruction combination will produce
1704 the same indirect address eventually. */
1705extern int cse_not_expected;
1706
f1db3576
JL		 1707/* Set to nonzero before life analysis to indicate that it is unsafe to
1708 generate any new pseudo registers. */
1709extern int no_new_pseudos;
1710
f5118aa5 1711/* Translates rtx code to tree code, for those codes needed by
88efc60a
RK		 1712 REAL_ARITHMETIC. The function returns an int because the caller may not
1713 know what `enum tree_code' means. */
1714
cdadb1dd 1715extern int rtx_to_tree_code PARAMS ((enum rtx_code));
9ae8ffe7 1716
ac957f13 1717/* In tree.c */
ac957f13 1718struct obstack;
cdadb1dd 1719extern void gcc_obstack_init PARAMS ((struct obstack *));
1f8f4a0b 1720
ac957f13
JL		 1721/* In cse.c */
1722struct cse_basic_block_data;
f1c1dfc3
BS		 1723
1724/* Return the right cost to give to an operation
1725 to make the cost of the corresponding register-to-register instruction
1726 N times that of a fast register-to-register instruction. */
1727#define COSTS_N_INSNS(N) ((N) * 4)
1728
1729/* Maximum cost of a rtl expression. This value has the special meaning
1730 not to use an rtx with this cost under any circumstances. */
1731#define MAX_COST INT_MAX
1732
cdadb1dd 1733extern int rtx_cost PARAMS ((rtx, enum rtx_code));
01329426 1734extern int address_cost PARAMS ((rtx, enum machine_mode));
4793dca1 1735extern void delete_trivially_dead_insns PARAMS ((rtx, int, int));
ac957f13 1736#ifdef BUFSIZ
cdadb1dd 1737extern int cse_main PARAMS ((rtx, int, int, FILE *));
ac957f13 1738#endif
cdadb1dd 1739extern void cse_end_of_basic_block PARAMS ((rtx,
ac957f13
JL		 1740 struct cse_basic_block_data *,
1741 int, int, int));
1742
1743/* In jump.c */
cdadb1dd
KG		 1744extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1745extern int condjump_p PARAMS ((rtx));
e4c85816
JH		 1746extern int any_condjump_p PARAMS ((rtx));
1747extern int any_uncondjump_p PARAMS ((rtx));
1748extern int safe_to_remove_jump_p PARAMS ((rtx));
1749extern rtx pc_set PARAMS ((rtx));
cdadb1dd
KG		 1750extern rtx condjump_label PARAMS ((rtx));
1751extern int simplejump_p PARAMS ((rtx));
1752extern int returnjump_p PARAMS ((rtx));
1753extern int onlyjump_p PARAMS ((rtx));
44ce0063 1754extern int only_sets_cc0_p PARAMS ((rtx));
cdadb1dd 1755extern int sets_cc0_p PARAMS ((rtx));
2ea64f10 1756extern int invert_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1757extern int invert_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1758extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1759extern int true_regnum PARAMS ((rtx));
2ea64f10 1760extern int redirect_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1761extern int redirect_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1762extern void rebuild_jump_labels PARAMS ((rtx));
1763extern void thread_jumps PARAMS ((rtx, int, int));
cdadb1dd 1764extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
cdadb1dd 1765extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
ab94bc48
JH		 1766extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1767extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1768 rtx, rtx, rtx));
cdadb1dd
KG		 1769extern void delete_for_peephole PARAMS ((rtx, rtx));
1770extern int condjump_in_parallel_p PARAMS ((rtx));
1771extern void never_reached_warning PARAMS ((rtx));
0045d504
JH		 1772extern void purge_line_number_notes PARAMS ((rtx));
1773extern void copy_loop_headers PARAMS ((rtx));
14bf4a33 1774
ac957f13 1775/* In emit-rtl.c. */
cdadb1dd
KG		 1776extern int max_reg_num PARAMS ((void));
1777extern int max_label_num PARAMS ((void));
1778extern int get_first_label_num PARAMS ((void));
1779extern void delete_insns_since PARAMS ((rtx));
1780extern void mark_reg_pointer PARAMS ((rtx, int));
1781extern void mark_user_reg PARAMS ((rtx));
1782extern void reset_used_flags PARAMS ((rtx));
1783extern void reorder_insns PARAMS ((rtx, rtx, rtx));
3c030e88 1784extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx));
cdadb1dd
KG		 1785extern int get_max_uid PARAMS ((void));
1786extern int in_sequence_p PARAMS ((void));
1787extern void force_next_line_note PARAMS ((void));
1788extern void clear_emit_caches PARAMS ((void));
1789extern void init_emit PARAMS ((void));
1790extern void init_emit_once PARAMS ((int));
1791extern void push_topmost_sequence PARAMS ((void));
1792extern void pop_topmost_sequence PARAMS ((void));
1793extern int subreg_realpart_p PARAMS ((rtx));
1794extern void reverse_comparison PARAMS ((rtx));
1795extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1796extern void set_new_first_and_last_label_num PARAMS ((int, int));
1797extern void set_new_last_label_num PARAMS ((int));
d1b81779 1798extern void unshare_all_rtl_again PARAMS ((rtx));
cdadb1dd
KG		 1799extern void set_last_insn PARAMS ((rtx));
1800extern void link_cc0_insns PARAMS ((rtx));
1801extern void add_insn PARAMS ((rtx));
1802extern void add_insn_before PARAMS ((rtx, rtx));
1803extern void add_insn_after PARAMS ((rtx, rtx));
1804extern void remove_insn PARAMS ((rtx));
1805extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1806extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1807extern enum rtx_code classify_insn PARAMS ((rtx));
1808extern rtx emit PARAMS ((rtx));
a11759a3
JR		 1809/* Query and clear/ restore no_line_numbers. This is used by the
1810 switch / case handling in stmt.c to give proper line numbers in
1811 warnings about unreachable code. */
cdadb1dd
KG		 1812int force_line_numbers PARAMS ((void));
1813void restore_line_number_status PARAMS ((int old_value));
1814extern void renumber_insns PARAMS ((FILE *));
f8855270 1815extern void remove_unnecessary_notes PARAMS ((void));
53c17031
JH		 1816extern rtx delete_insn PARAMS ((rtx));
1817extern void delete_insn_chain PARAMS ((rtx, rtx));
ac957f13 1818
ac957f13 1819/* In combine.c */
770ae6cc
RK		 1820extern int combine_instructions PARAMS ((rtx, unsigned int));
1821extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1822extern rtx remove_death PARAMS ((unsigned int, rtx));
ac957f13 1823#ifdef BUFSIZ
cdadb1dd
KG		 1824extern void dump_combine_stats PARAMS ((FILE *));
1825extern void dump_combine_total_stats PARAMS ((FILE *));
ac957f13
JL		 1826#endif
1827
1828/* In sched.c. */
1829#ifdef BUFSIZ
cdadb1dd 1830extern void schedule_insns PARAMS ((FILE *));
18e720b3 1831extern void schedule_ebbs PARAMS ((FILE *));
ac957f13 1832#endif
cdadb1dd 1833extern void fix_sched_param PARAMS ((const char *, const char *));
ac957f13
JL		 1834
1835/* In print-rtl.c */
47c10e9b 1836extern const char *print_rtx_head;
cdadb1dd
KG		 1837extern void debug_rtx PARAMS ((rtx));
1838extern void debug_rtx_list PARAMS ((rtx, int));
4c85a96d 1839extern void debug_rtx_range PARAMS ((rtx, rtx));
cdadb1dd 1840extern rtx debug_rtx_find PARAMS ((rtx, int));
ac957f13 1841#ifdef BUFSIZ
cdadb1dd 1842extern void print_rtl PARAMS ((FILE *, rtx));
75b7557d 1843extern void print_simple_rtl PARAMS ((FILE *, rtx));
cdadb1dd
KG		 1844extern int print_rtl_single PARAMS ((FILE *, rtx));
1845extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
ac957f13
JL		 1846#endif
1847
1848/* In loop.c */
cdadb1dd
KG		 1849extern void init_loop PARAMS ((void));
1850extern rtx libcall_other_reg PARAMS ((rtx, rtx));
ac957f13 1851#ifdef BUFSIZ
1bf14ad7 1852extern void loop_optimize PARAMS ((rtx, FILE *, int));
ac957f13 1853#endif
cdadb1dd 1854extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
ac957f13
JL		 1855
1856/* In function.c */
cdadb1dd
KG		 1857extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1858extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1859extern int prologue_epilogue_contains PARAMS ((rtx));
0a1c58a2 1860extern int sibcall_epilogue_contains PARAMS ((rtx));
591ccf92 1861extern void preserve_rtl_expr_result PARAMS ((rtx));
cdadb1dd
KG		 1862extern void mark_temp_addr_taken PARAMS ((rtx));
1863extern void update_temp_slot_address PARAMS ((rtx, rtx));
cdadb1dd 1864extern void purge_addressof PARAMS ((rtx));
659e47fb 1865extern void purge_hard_subreg_sets PARAMS ((rtx));
ac957f13 1866
ac957f13 1867/* In stmt.c */
47ee9bcb 1868extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
cdadb1dd
KG		 1869extern void expand_null_return PARAMS ((void));
1870extern void emit_jump PARAMS ((rtx));
1871extern int preserve_subexpressions_p PARAMS ((void));
ac957f13
JL		 1872
1873/* In expr.c */
3bdf5ad1
RK		 1874extern void move_by_pieces PARAMS ((rtx, rtx,
1875 unsigned HOST_WIDE_INT,
1876 unsigned int));
2e245dac 1877
ac957f13 1878/* In flow.c */
cdadb1dd 1879extern void recompute_reg_usage PARAMS ((rtx, int));
ac957f13 1880#ifdef BUFSIZ
cdadb1dd
KG		 1881extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1882extern void dump_flow_info PARAMS ((FILE *));
ac957f13
JL		 1883#endif
1884
1885/* In expmed.c */
cdadb1dd
KG		 1886extern void init_expmed PARAMS ((void));
1887extern void expand_inc PARAMS ((rtx, rtx));
1888extern void expand_dec PARAMS ((rtx, rtx));
1889extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
ac957f13
JL		 1890 unsigned HOST_WIDE_INT, rtx,
1891 int, int));
1892
50b2596f
KG		 1893/* In gcse.c */
1894#ifdef BUFSIZ
cdadb1dd 1895extern int gcse_main PARAMS ((rtx, FILE *));
50b2596f
KG		 1896#endif
1897
ac957f13 1898/* In global.c */
cdadb1dd 1899extern void mark_elimination PARAMS ((int, int));
ac957f13 1900#ifdef BUFSIZ
cdadb1dd
KG		 1901extern int global_alloc PARAMS ((FILE *));
1902extern void dump_global_regs PARAMS ((FILE *));
ac957f13 1903#endif
cab634f2 1904#ifdef HARD_CONST
cdadb1dd 1905extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
cab634f2 1906#endif
d29c259b 1907extern void build_insn_chain PARAMS ((rtx));
ac957f13
JL		 1908
1909/* In regclass.c */
cdadb1dd
KG		 1910extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1911extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1912extern void globalize_reg PARAMS ((int));
1913extern void init_regs PARAMS ((void));
1914extern void init_reg_sets PARAMS ((void));
1915extern void regset_release_memory PARAMS ((void));
1916extern void regclass_init PARAMS ((void));
1917extern void regclass PARAMS ((rtx, int, FILE *));
770ae6cc
RK		 1918extern void reg_scan PARAMS ((rtx, unsigned int, int));
1919extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
cdadb1dd
KG		 1920extern void fix_register PARAMS ((const char *, int, int));
1921
1922extern void delete_null_pointer_checks PARAMS ((rtx));
a157febd 1923
50b2596f
KG		 1924/* In regmove.c */
1925#ifdef BUFSIZ
cdadb1dd 1926extern void regmove_optimize PARAMS ((rtx, int, FILE *));
50b2596f 1927#endif
1e7f0a48 1928extern void combine_stack_adjustments PARAMS ((void));
50b2596f
KG		 1929
1930/* In reorg.c */
1931#ifdef BUFSIZ
cdadb1dd 1932extern void dbr_schedule PARAMS ((rtx, FILE *));
50b2596f
KG		 1933#endif
1934
ac957f13
JL		 1935/* In local-alloc.c */
1936#ifdef BUFSIZ
cdadb1dd 1937extern void dump_local_alloc PARAMS ((FILE *));
ac957f13 1938#endif
cdadb1dd
KG		 1939extern int local_alloc PARAMS ((void));
1940extern int function_invariant_p PARAMS ((rtx));
ac957f13 1941
ac957f13 1942/* In profile.c */
cdadb1dd 1943extern void init_branch_prob PARAMS ((const char *));
51891abe
JH		 1944extern void branch_prob PARAMS ((void));
1945extern void end_branch_prob PARAMS ((void));
cdadb1dd 1946extern void output_func_start_profiler PARAMS ((void));
ac957f13
JL		 1947
1948/* In reg-stack.c */
1949#ifdef BUFSIZ
cdadb1dd 1950extern void reg_to_stack PARAMS ((rtx, FILE *));
ac957f13 1951#endif
ac957f13
JL		 1952
1953/* In fold-const.c */
05bccae2
RK		 1954extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1955 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1956 unsigned HOST_WIDE_INT *,
1957 HOST_WIDE_INT *));
1958extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1959 unsigned HOST_WIDE_INT *,
1960 HOST_WIDE_INT *));
1961extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1962 HOST_WIDE_INT,
1963 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1964 unsigned HOST_WIDE_INT *,
1965 HOST_WIDE_INT *));
1966extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1967 HOST_WIDE_INT, unsigned int,
1968 unsigned HOST_WIDE_INT *,
1969 HOST_WIDE_INT *, int));
1970extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1971 HOST_WIDE_INT, unsigned int,
1972 unsigned HOST_WIDE_INT *,
1973 HOST_WIDE_INT *, int));
1974extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1975 HOST_WIDE_INT, unsigned int,
1976 unsigned HOST_WIDE_INT *,
1977 HOST_WIDE_INT *));
1978extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1979 HOST_WIDE_INT, unsigned int,
1980 unsigned HOST_WIDE_INT *,
1981 HOST_WIDE_INT *));
ac957f13
JL		 1982
1983/* In calls.c */
ebb1b59a
BS		 1984enum libcall_type
1985{
1986 LCT_NORMAL = 0,
1987 LCT_CONST = 1,
1988 LCT_PURE = 2,
1989 LCT_CONST_MAKE_BLOCK = 3,
695ee791 1990 LCT_PURE_MAKE_BLOCK = 4,
9555a122 1991 LCT_NORETURN = 5,
9d98f8f9 1992 LCT_THROW = 6,
9defc9b7
RH		 1993 LCT_ALWAYS_RETURN = 7,
1994 LCT_RETURNS_TWICE = 8
ebb1b59a
BS		 1995};
1996
1997extern void emit_library_call PARAMS ((rtx, enum libcall_type,
1998 enum machine_mode, int,
1999 ...));
2000extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
2001 enum machine_mode, int,
2002 ...));
ac957f13
JL		 2003
2004/* In unroll.c */
cdadb1dd 2005extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
ac957f13
JL		 2006
2007/* In varasm.c */
cdadb1dd 2008extern int in_data_section PARAMS ((void));
cdadb1dd 2009extern void init_varasm_once PARAMS ((void));
ac957f13
JL		 2010
2011/* In rtl.c */
cdadb1dd 2012extern void init_rtl PARAMS ((void));
c25c12b8
R		 2013extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
2014 void *));
2015struct md_constant { char *name, *value; };
ac957f13 2016
bcdaba58 2017#ifdef BUFSIZ
cdadb1dd
KG		 2018extern int read_skip_spaces PARAMS ((FILE *));
2019extern rtx read_rtx PARAMS ((FILE *));
bcdaba58
RH		 2020#endif
2021
2022extern const char *read_rtx_filename;
2023extern int read_rtx_lineno;
2024
987009bf
ZW		 2025/* Redefine abort to report an internal error w/o coredump, and
2026 reporting the location of the error in the source file. This logic
2027 is duplicated in rtl.h and tree.h because every file that needs the
2028 special abort includes one or both. toplev.h gets too few files,
2029 system.h gets too many. */
2030
cdadb1dd 2031extern void fancy_abort PARAMS ((const char *, int, const char *))
987009bf 2032 ATTRIBUTE_NORETURN;
fbfc1192 2033#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
987009bf 2034
ac957f13 2035/* In alias.c */
43fe47ca 2036extern void clear_reg_alias_info PARAMS ((rtx));
db048faf 2037extern rtx canon_rtx PARAMS ((rtx));
cdadb1dd 2038extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
e38fe8e0 2039 int (*)(rtx, int)));
a13d4ebf
AM		 2040extern rtx get_addr PARAMS ((rtx));
2041extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2042 rtx, int (*)(rtx, int)));
cdadb1dd
KG		 2043extern int read_dependence PARAMS ((rtx, rtx));
2044extern int anti_dependence PARAMS ((rtx, rtx));
2045extern int output_dependence PARAMS ((rtx, rtx));
2046extern void mark_constant_function PARAMS ((void));
2047extern void init_alias_once PARAMS ((void));
2048extern void init_alias_analysis PARAMS ((void));
2049extern void end_alias_analysis PARAMS ((void));
cdadb1dd 2050extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
4c649323 2051
0a1c58a2
JL		 2052/* In sibcall.c */
2053typedef enum {
2054 sibcall_use_normal = 1,
2055 sibcall_use_tail_recursion,
2056 sibcall_use_sibcall
2057} sibcall_use_t;
2058
2059extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2060extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2061
21b2cd73 2062#ifdef STACK_REGS
cdadb1dd 2063extern int stack_regs_mentioned PARAMS ((rtx insn));
21b2cd73
JH		 2064#endif
2065
a157febd 2066/* In toplev.c */
a157febd 2067extern rtx stack_limit_rtx;
dfdb644f 2068
7b82b5da 2069/* In regrename.c */
7b82b5da
SC		 2070extern void regrename_optimize PARAMS ((void));
2071
4db384c9 2072/* In ifcvt.c */
2ea64f10
RH		 2073extern void if_convert PARAMS ((int));
2074
4db384c9
JH		 2075/* In predict.c */
2076extern void invert_br_probabilities PARAMS ((rtx));
6ab16dd9 2077extern bool expensive_function_p PARAMS ((int));
88657302 2078#endif /* ! GCC_RTL_H */
GNU Compiler Collection
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