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* config/mips/mips.c (mips_legitimate_address_p): Limit "la" addresses.
[gcc.git] / gcc / rtl.h
CommitLineData
6f29feb1 1/* Register Transfer Language (RTL) definitions for GNU C-Compiler
af841dbd 2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
90a74703 3 1999, 2000, 2001 Free Software Foundation, Inc.
6f29feb1
JW		 4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING. If not, write to
e99215a3
RK		 19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA. */
6f29feb1 21
88657302
RH		 22#ifndef GCC_RTL_H
23#define GCC_RTL_H
6f29feb1 24
36edd3cc
BS		 25struct function;
26
6f29feb1
JW		 27#include "machmode.h"
28
29#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
1cfc3092 30#undef FLOAT /* Likewise. */
ac889e46 31#undef ABS /* Likewise. */
71ae9cc6 32#undef PC /* Likewise. */
6f29feb1 33
88efc60a
RK		 34#ifndef TREE_CODE
35union tree_node;
36#endif
37
b5832b43
JH		 38/* Value used by some passes to "recognize" noop moves as valid instructions.
39 */
40#define NOOP_MOVE_INSN_CODE INT_MAX
41
6f29feb1
JW		 42/* Register Transfer Language EXPRESSIONS CODES */
43
44#define RTX_CODE enum rtx_code
45enum rtx_code {
46
47#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
48#include "rtl.def" /* rtl expressions are documented here */
49#undef DEF_RTL_EXPR
50
6dc42e49 51 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
6f29feb1 52 NUM_RTX_CODE.
6dc42e49 53 Assumes default enum value assignment. */
6f29feb1
JW		 54
55#define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
56 /* The cast here, saves many elsewhere. */
57
aa0b4465 58extern const int rtx_length[];
0f41302f 59#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
6f29feb1 60
5f06c983 61extern const char * const rtx_name[];
0f41302f 62#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
6f29feb1 63
aa0b4465 64extern const char * const rtx_format[];
0f41302f 65#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
6f29feb1 66
1f9a015e 67extern const char rtx_class[];
0f41302f 68#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
6f29feb1 69\f
33f7f353
JR		 70/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
71 relative to which the offsets are calculated, as explained in rtl.def. */
72typedef struct
73{
74 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
75 unsigned min_align: 8;
76 /* Flags: */
77 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
78 unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
79 unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
80 unsigned min_after_base: 1; /* minimum address target label is after BASE. */
81 unsigned max_after_base: 1; /* maximum address target label is after BASE. */
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
6f29feb1
JW		 88/* Common union for an element of an rtx. */
89
90typedef union rtunion_def
91{
5f4f0e22 92 HOST_WIDE_INT rtwint;
6f29feb1 93 int rtint;
770ae6cc 94 unsigned int rtuint;
3cce094d 95 const char *rtstr;
6f29feb1
JW		 96 struct rtx_def *rtx;
97 struct rtvec_def *rtvec;
98 enum machine_mode rttype;
33f7f353 99 addr_diff_vec_flags rt_addr_diff_vec_flags;
eab5c70a 100 struct cselib_val_struct *rt_cselib;
0dfa1860
MM		 101 struct bitmap_head_def *rtbit;
102 union tree_node *rttree;
e881bb1b 103 struct basic_block_def *bb;
6f29feb1
JW		 104} rtunion;
105
106/* RTL expression ("rtx"). */
107
108typedef struct rtx_def
109{
6f29feb1 110 /* The kind of expression this is. */
c149cc37 111 ENUM_BITFIELD(rtx_code) code: 16;
18def38f 112
6f29feb1 113 /* The kind of value the expression has. */
c149cc37
RL		 114 ENUM_BITFIELD(machine_mode) mode : 8;
115
0a1c58a2
JL		 116 /* 1 in an INSN if it can alter flow of control
117 within this function.
118 LINK_COST_ZERO in an INSN_LIST. */
6f29feb1 119 unsigned int jump : 1;
0a1c58a2
JL		 120 /* 1 in an INSN if it can call another function.
121 LINK_COST_FREE in an INSN_LIST. */
6f29feb1 122 unsigned int call : 1;
49982682
JW		 123 /* 1 in a REG if value of this expression will never change during
124 the current function, even though it is not manifestly constant.
125 1 in a MEM if contents of memory are constant. This does not
126 necessarily mean that the value of this expression is constant.
07be3989 127 1 in a SUBREG if it is from a promoted variable that is unsigned.
6f29feb1
JW		 128 1 in a SYMBOL_REF if it addresses something in the per-function
129 constants pool.
130 1 in a CALL_INSN if it is a const call.
131 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
132 reorg until end of compilation; cleared before used. */
133 unsigned int unchanging : 1;
134 /* 1 in a MEM expression if contents of memory are volatile.
135 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
136 if it is deleted.
137 1 in a REG expression if corresponds to a variable declared by the user.
138 0 for an internally generated temporary.
2a406d2a
RS		 139 In a SYMBOL_REF, this flag is used for machine-specific purposes.
140 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
6f29feb1 141 unsigned int volatil : 1;
8358a974 142 /* 1 in a MEM referring to a field of an aggregate.
6f29feb1
JW		 143 0 if the MEM was a variable or the result of a * operator in C;
144 1 if it was the result of a . or -> operator (on a struct) in C.
145 1 in a REG if the register is used only in exit code a loop.
f590cca1 146 1 in a SUBREG expression if was generated from a variable with a
07be3989 147 promoted mode.
6f29feb1
JW		 148 1 in a CODE_LABEL if the label is used for nonlocal gotos
149 and must not be deleted even if its count is zero.
150 1 in a LABEL_REF if this is a reference to a label outside the
151 current loop.
152 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
d45cf215 153 together with the preceding insn. Valid only within sched.
6f29feb1
JW		 154 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
155 from the target of a branch. Valid from reorg until end of compilation;
b53978a3
JO		 156 cleared before used.
157 1 in an INSN if this insn is dead code. Valid only during
158 dead-code elimination phase; cleared before use. */
6f29feb1
JW		 159 unsigned int in_struct : 1;
160 /* 1 if this rtx is used. This is used for copying shared structure.
161 See `unshare_all_rtl'.
f590cca1 162 In a REG, this is not needed for that purpose, and used instead
6f29feb1
JW		 163 in `leaf_renumber_regs_insn'.
164 In a SYMBOL_REF, means that emit_library_call
165 has used it as the function. */
166 unsigned int used : 1;
167 /* Nonzero if this rtx came from procedure integration.
168 In a REG, nonzero means this reg refers to the return value
ff0b6b99
FS		 169 of the current function.
170 1 in a SYMBOL_REF if the symbol is weak. */
6f29feb1 171 unsigned integrated : 1;
b664de3a 172 /* 1 in an INSN or a SET if this rtx is related to the call frame,
c6df88cb 173 either changing how we compute the frame address or saving and
f590cca1 174 restoring registers in the prologue and epilogue.
c6df88cb 175 1 in a MEM if the MEM refers to a scalar, rather than a member of
bd7cf17e 176 an aggregate.
3502dc9c 177 1 in a REG if the register is a pointer.
bd7cf17e
JJ		 178 1 in a SYMBOL_REF if it addresses something in the per-function
179 constant string pool. */
469ac993 180 unsigned frame_related : 1;
0a25f1f5 181
6f29feb1
JW		 182 /* The first element of the operands of this rtx.
183 The number of operands and their types are controlled
184 by the `code' field, according to rtl.def. */
185 rtunion fld[1];
186} *rtx;
187
188#define NULL_RTX (rtx) 0
189
190/* Define macros to access the `code' field of the rtx. */
191
dbbbbf3b
JDA		 192#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
193#define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
6f29feb1 194
dbbbbf3b
JDA		 195#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
196#define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
6f29feb1
JW		 197
198#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
199#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
469ac993 200#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
6f29feb1
JW		 201
202/* RTL vector. These appear inside RTX's when there is a need
203 for a variable number of things. The principle use is inside
204 PARALLEL expressions. */
205
206typedef struct rtvec_def{
e9a25f70 207 int num_elem; /* number of elements */
8f985ec4 208 struct rtx_def *elem[1];
6f29feb1
JW		 209} *rtvec;
210
211#define NULL_RTVEC (rtvec) 0
212
213#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
e9a25f70 214#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
6f29feb1 215
b53978a3 216/* Predicate yielding nonzero iff X is an rtl for a register. */
6f29feb1
JW		 217#define REG_P(X) (GET_CODE (X) == REG)
218
b53978a3
JO		 219/* Predicate yielding nonzero iff X is a label insn. */
220#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
221
222/* Predicate yielding nonzero iff X is a jump insn. */
223#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
224
225/* Predicate yielding nonzero iff X is a note insn. */
226#define NOTE_P(X) (GET_CODE (X) == NOTE)
227
228/* Predicate yielding nonzero iff X is a barrier insn. */
229#define BARRIER_P(X) (GET_CODE (X) == BARRIER)
230
231/* Predicate yielding nonzero iff X is a data for a jump table. */
232#define JUMP_TABLE_DATA_P(INSN) \
233 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
234 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
235
6f29feb1
JW		 236/* 1 if X is a constant value that is an integer. */
237
238#define CONSTANT_P(X) \
239 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
240 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
ee5332b8
RH		 241 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
242 || GET_CODE (X) == CONSTANT_P_RTX)
6f29feb1
JW		 243
244/* General accessor macros for accessing the fields of an rtx. */
245
f4524c9e 246#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
ef178af3
ZW		 247/* The bit with a star outside the statement expr and an & inside is
248 so that N can be evaluated only once. */
8784fdcd 249#define RTL_CHECK1(RTX, N, C1) __extension__ \
83ab3839 250(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 251 enum rtx_code _code = GET_CODE (_rtx); \
252 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
fbfc1192 253 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
ef178af3 254 if (GET_RTX_FORMAT(_code)[_n] != C1) \
fbfc1192 255 rtl_check_failed_type1(_rtx, _n, C1, __FILE__, __LINE__, __FUNCTION__); \
ef178af3
ZW		 256 &_rtx->fld[_n]; }))
257
8784fdcd 258#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
83ab3839 259(*({ rtx _rtx = (RTX); int _n = (N); \
ef178af3
ZW		 260 enum rtx_code _code = GET_CODE (_rtx); \
261 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
fbfc1192 262 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, __FUNCTION__); \
ef178af3
ZW		 263 if (GET_RTX_FORMAT(_code)[_n] != C1 \
264 && GET_RTX_FORMAT(_code)[_n] != C2) \
265 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
fbfc1192 266 __FUNCTION__); \
ef178af3
ZW		 267 &_rtx->fld[_n]; }))
268
8784fdcd 269#define RTL_CHECKC1(RTX, N, C) __extension__ \
83ab3839
RH		 270(*({ rtx _rtx = (RTX); int _n = (N); \
271 if (GET_CODE (_rtx) != C) \
fbfc1192 272 rtl_check_failed_code1 (_rtx, C, __FILE__, __LINE__, __FUNCTION__); \
83ab3839
RH		 273 &_rtx->fld[_n]; }))
274
8784fdcd 275#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
83ab3839
RH		 276(*({ rtx _rtx = (RTX); int _n = (N); \
277 enum rtx_code _code = GET_CODE (_rtx); \
278 if (_code != C1 && _code != C2) \
fbfc1192 279 rtl_check_failed_code2(_rtx, C1, C2, __FILE__, __LINE__, __FUNCTION__); \
83ab3839
RH		 280 &_rtx->fld[_n]; }))
281
8784fdcd 282#define RTVEC_ELT(RTVEC, I) __extension__ \
83ab3839 283(*({ rtvec _rtvec = (RTVEC); int _i = (I); \
ef178af3
ZW		 284 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
285 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
fbfc1192 286 __FUNCTION__); \
ef178af3
ZW		 287 &_rtvec->elem[_i]; }))
288
cdadb1dd 289extern void rtl_check_failed_bounds PARAMS ((rtx, int,
ef178af3
ZW		 290 const char *, int, const char *))
291 ATTRIBUTE_NORETURN;
cdadb1dd 292extern void rtl_check_failed_type1 PARAMS ((rtx, int, int,
ef178af3
ZW		 293 const char *, int, const char *))
294 ATTRIBUTE_NORETURN;
cdadb1dd 295extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int,
ef178af3
ZW		 296 const char *, int, const char *))
297 ATTRIBUTE_NORETURN;
cdadb1dd 298extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code,
83ab3839
RH		 299 const char *, int, const char *))
300 ATTRIBUTE_NORETURN;
cdadb1dd 301extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code,
83ab3839
RH		 302 const char *, int, const char *))
303 ATTRIBUTE_NORETURN;
cdadb1dd 304extern void rtvec_check_failed_bounds PARAMS ((rtvec, int,
ef178af3
ZW		 305 const char *, int, const char *))
306 ATTRIBUTE_NORETURN;
307
f4524c9e 308#else /* not ENABLE_RTL_CHECKING */
ef178af3 309
83ab3839
RH		 310#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
311#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
312#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
818a3b15 313#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
83ab3839 314#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
ef178af3
ZW		 315
316#endif
317
318#define XWINT(RTX, N) (RTL_CHECK1(RTX, N, 'w').rtwint)
319#define XINT(RTX, N) (RTL_CHECK2(RTX, N, 'i', 'n').rtint)
320#define XSTR(RTX, N) (RTL_CHECK2(RTX, N, 's', 'S').rtstr)
321#define XEXP(RTX, N) (RTL_CHECK2(RTX, N, 'e', 'u').rtx)
322#define XVEC(RTX, N) (RTL_CHECK2(RTX, N, 'E', 'V').rtvec)
323#define XMODE(RTX, N) (RTL_CHECK1(RTX, N, 'M').rttype)
324#define XBITMAP(RTX, N) (RTL_CHECK1(RTX, N, 'b').rtbit)
325#define XTREE(RTX, N) (RTL_CHECK1(RTX, N, 't').rttree)
326#define XBBDEF(RTX, N) (RTL_CHECK1(RTX, N, 'B').bb)
1f3b37a3 327#define XTMPL(RTX, N) (RTL_CHECK1(RTX, N, 'T').rtstr)
ef178af3
ZW		 328
329#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
330#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
331
332/* These are like XWINT, etc. except that they expect a '0' field instead
333 of the normal type code. */
334
335#define X0WINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtwint)
336#define X0INT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtint)
08394eef 337#define X0UINT(RTX, N) (RTL_CHECK1(RTX, N, '0').rtuint)
ef178af3
ZW		 338#define X0STR(RTX, N) (RTL_CHECK1(RTX, N, '0').rtstr)
339#define X0EXP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtx)
340#define X0VEC(RTX, N) (RTL_CHECK1(RTX, N, '0').rtvec)
341#define X0MODE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttype)
342#define X0BITMAP(RTX, N) (RTL_CHECK1(RTX, N, '0').rtbit)
343#define X0TREE(RTX, N) (RTL_CHECK1(RTX, N, '0').rttree)
344#define X0BBDEF(RTX, N) (RTL_CHECK1(RTX, N, '0').bb)
345#define X0ADVFLAGS(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_addr_diff_vec_flags)
eab5c70a 346#define X0CSELIB(RTX, N) (RTL_CHECK1(RTX, N, '0').rt_cselib)
0dfa1860 347
83ab3839
RH		 348#define XCWINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtwint)
349#define XCINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtint)
770ae6cc 350#define XCUINT(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtuint)
83ab3839
RH		 351#define XCSTR(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtstr)
352#define XCEXP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtx)
353#define XCVEC(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtvec)
354#define XCMODE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttype)
355#define XCBITMAP(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rtbit)
356#define XCTREE(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rttree)
357#define XCBBDEF(RTX, N, C) (RTL_CHECKC1(RTX, N, C).bb)
358#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_addr_diff_vec_flags)
eab5c70a 359#define XCCSELIB(RTX, N, C) (RTL_CHECKC1(RTX, N, C).rt_cselib)
83ab3839
RH		 360
361#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
362#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
363
364#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2(RTX, N, C1, C2).rtx)
6f29feb1
JW		 365\f
366/* ACCESS MACROS for particular fields of insns. */
367
4e872036
AS		 368/* Determines whether X is an insn. */
369#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
370
6f29feb1
JW		 371/* Holds a unique number for each insn.
372 These are not necessarily sequentially increasing. */
8f985ec4 373#define INSN_UID(INSN) XINT(INSN, 0)
6f29feb1
JW		 374
375/* Chain insns together in sequence. */
8f985ec4
ZW		 376#define PREV_INSN(INSN) XEXP(INSN, 1)
377#define NEXT_INSN(INSN) XEXP(INSN, 2)
6f29feb1
JW		 378
379/* The body of an insn. */
8f985ec4 380#define PATTERN(INSN) XEXP(INSN, 3)
6f29feb1
JW		 381
382/* Code number of instruction, from when it was recognized.
383 -1 means this instruction has not been recognized yet. */
8f985ec4 384#define INSN_CODE(INSN) XINT(INSN, 4)
6f29feb1
JW		 385
386/* Set up in flow.c; empty before then.
387 Holds a chain of INSN_LIST rtx's whose first operands point at
388 previous insns with direct data-flow connections to this one.
389 That means that those insns set variables whose next use is in this insn.
390 They are always in the same basic block as this insn. */
8f985ec4 391#define LOG_LINKS(INSN) XEXP(INSN, 5)
6f29feb1
JW		 392
393/* 1 if insn has been deleted. */
394#define INSN_DELETED_P(INSN) ((INSN)->volatil)
395
24a28584
JH		 396/* 1 if insn is a call to a const or pure function. */
397#define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging)
6f29feb1 398
0a1c58a2
JL		 399/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */
400#define SIBLING_CALL_P(INSN) ((INSN)->jump)
401
6f29feb1
JW		 402/* 1 if insn is a branch that should not unconditionally execute its
403 delay slots, i.e., it is an annulled branch. */
404#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
405
b53978a3
JO		 406/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */
407#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct)
408
6f29feb1 409/* 1 if insn is in a delay slot and is from the target of the branch. If
6dc42e49 410 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
6f29feb1
JW		 411 executed if the branch is taken. For annulled branches with this bit
412 clear, the insn should be executed only if the branch is not taken. */
413#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
414
f590cca1
RH		 415#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
416
417#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
418
6f29feb1 419/* Holds a list of notes on what this insn does to various REGs.
f590cca1
RH		 420 It is a chain of EXPR_LIST rtx's, where the second operand is the
421 chain pointer and the first operand is the REG being described.
6f29feb1 422 The mode field of the EXPR_LIST contains not a real machine mode
f590cca1 423 but a value from enum reg_note. */
6f29feb1 424
8f985ec4 425#define REG_NOTES(INSN) XEXP(INSN, 6)
6f29feb1
JW		 426
427/* Don't forget to change reg_note_name in rtl.c. */
f590cca1
RH		 428enum reg_note
429{
430 /* The value in REG dies in this insn (i.e., it is not needed past
431 this insn). If REG is set in this insn, the REG_DEAD note may,
432 but need not, be omitted. */
433 REG_DEAD = 1,
434
435 /* The REG is autoincremented or autodecremented. */
436 REG_INC,
437
438 /* Describes the insn as a whole; it says that the insn sets a register
439 to a constant value or to be equivalent to a memory address. If the
440 register is spilled to the stack then the constant value should be
441 substituted for it. The contents of the REG_EQUIV is the constant
442 value or memory address, which may be different from the source of
443 the SET although it has the same value. A REG_EQUIV note may also
444 appear on an insn which copies a register parameter to a pseudo-register,
445 if there is a memory address which could be used to hold that
446 pseudo-register throughout the function. */
be1bb652 447 REG_EQUIV,
f590cca1
RH		 448
449 /* Like REG_EQUIV except that the destination is only momentarily equal
450 to the specified rtx. Therefore, it cannot be used for substitution;
451 but it can be used for cse. */
452 REG_EQUAL,
453
454 /* The register set in this insn held 0 before the insn. The contents of
455 the note is the insn that stored the 0. If that insn is deleted or
456 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
457 is actually an INSN_LIST, not an EXPR_LIST. */
458 REG_WAS_0,
459
460 /* This insn copies the return-value of a library call out of the hard reg
461 for return values. This note is actually an INSN_LIST and it points to
462 the first insn involved in setting up arguments for the call. flow.c
463 uses this to delete the entire library call when its result is dead. */
464 REG_RETVAL,
465
466 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
be1bb652
RH		 467 and points at the one that has the REG_RETVAL. This note is also an
468 INSN_LIST. */
f590cca1
RH		 469 REG_LIBCALL,
470
471 /* The register is always nonnegative during the containing loop. This is
472 used in branches so that decrement and branch instructions terminating
473 on zero can be matched. There must be an insn pattern in the md file
474 named `decrement_and_branch_until_zero' or else this will never be added
475 to any instructions. */
476 REG_NONNEG,
477
478 /* There is no conflict *after this insn* between the register in the note
479 and the destination of this insn. */
480 REG_NO_CONFLICT,
481
482 /* Identifies a register set in this insn and never used. */
483 REG_UNUSED,
484
485 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
486 respectively. Normally, these are required to be consecutive insns, but
487 we permit putting a cc0-setting insn in the delay slot of a branch as
488 long as only one copy of the insn exists. In that case, these notes
489 point from one to the other to allow code generation to determine what
be1bb652
RH		 490 any require information and to properly update CC_STATUS. These notes
491 are INSN_LISTs. */
f590cca1
RH		 492 REG_CC_SETTER, REG_CC_USER,
493
494 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
be1bb652
RH		 495 CODE_LABEL contained in the REG_LABEL note is used by the insn.
496 This note is an INSN_LIST. */
f590cca1
RH		 497 REG_LABEL,
498
499 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
500 write-after-read and write-after-write dependencies respectively.
501 Data dependencies, which are the only type of LOG_LINK created by
502 flow, are represented by a 0 reg note kind. */
503 REG_DEP_ANTI, REG_DEP_OUTPUT,
504
4db384c9
JH		 505 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
506 It has an integer value. For jumps, it is the probability that this is a
507 taken branch. For calls, it is the probability that this call won't
508 return. */
f590cca1
RH		 509 REG_BR_PROB,
510
511 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
512 the first insn after each CALL_INSN. It indicates how many times this
513 block was executed. */
514 REG_EXEC_COUNT,
515
516 /* Attached to a call insn; indicates that the call is malloc-like and
517 that the pointer returned cannot alias anything else. */
518 REG_NOALIAS,
519
520 /* Used to optimize rtl generated by dynamic stack allocations for targets
521 where SETJMP_VIA_SAVE_AREA is true. */
522 REG_SAVE_AREA,
523
4db384c9
JH		 524 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
525 CONCAT of two integer value. First specifies the branch predictor
526 that added the note, second specifies the predicted hitrate of branch
527 in the same format as REG_BR_PROB note uses. */
f590cca1
RH		 528 REG_BR_PRED,
529
530 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
531 for DWARF to interpret what they imply. The attached rtx is used
532 instead of intuition. */
533 REG_FRAME_RELATED_EXPR,
534
535 /* Indicates that REG holds the exception context for the function.
536 This context is shared by inline functions, so the code to acquire
537 the real exception context is delayed until after inlining. */
538 REG_EH_CONTEXT,
539
540 /* Indicates what exception region an INSN belongs in. This is used to
541 indicate what region to which a call may throw. REGION 0 indicates
542 that a call cannot throw at all. REGION -1 indicates that it cannot
543 throw, nor will it execute a non-local goto. */
544 REG_EH_REGION,
545
546 /* Indicates that a call is actually a call to rethrow, and specifies the
547 rethrow symbol for the region the rethrow is targetting. This provides
548 a way to generate the non standard flow edges required for a rethrow. */
549 REG_EH_RETHROW,
550
551 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
8cd8f856
GK		 552 REG_SAVE_NOTE,
553
554 /* Indicates that this insn (which is part of the prologue) computes
555 a value which might not be used later, and if so it's OK to delete
556 the insn. Normally, deleting any insn in the prologue is an error.
557 At present the parameter is unused and set to (const_int 0). */
ca3920ad
JW		 558 REG_MAYBE_DEAD,
559
560 /* Indicates that a call does not return. */
4b01bd16
RH		 561 REG_NORETURN,
562
563 /* Indicates that an indirect jump is a non-local goto instead of a
564 computed goto. */
570a98eb
JH		 565 REG_NON_LOCAL_GOTO,
566
567 /* This kind of note is generated at each to `setjmp',
568 and similar functions that can return twice. */
569 REG_SETJMP
f590cca1
RH		 570};
571
7ae21caf
DE		 572/* The base value for branch probability notes. */
573#define REG_BR_PROB_BASE 10000
6f29feb1
JW		 574
575/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
576#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
577#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
578
579/* Names for REG_NOTE's in EXPR_LIST insn's. */
580
1f9a015e 581extern const char * const reg_note_name[];
0f41302f 582#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
6f29feb1 583
e51c6661
RK		 584/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
585 USE and CLOBBER expressions.
586 USE expressions list the registers filled with arguments that
587 are passed to the function.
588 CLOBBER expressions document the registers explicitly clobbered
589 by this CALL_INSN.
590 Pseudo registers can not be mentioned in this list. */
8f985ec4 591#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
e51c6661 592
6f29feb1
JW		 593/* The label-number of a code-label. The assembler label
594 is made from `L' and the label-number printed in decimal.
595 Label numbers are unique in a compilation. */
be1bb652 596#define CODE_LABEL_NUMBER(INSN) XINT(INSN, 5)
6f29feb1
JW		 597
598#define LINE_NUMBER NOTE
599
0dfa1860
MM		 600/* In a NOTE that is a line number, this is a string for the file name that the
601 line is in. We use the same field to record block numbers temporarily in
602 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
603 between ints and pointers if we use a different macro for the block number.)
604 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
605 information as a rtx in the field. */
6f29feb1 606
83ab3839 607#define NOTE_SOURCE_FILE(INSN) XCSTR(INSN, 3, NOTE)
1a4450c7 608#define NOTE_BLOCK(INSN) XCTREE(INSN, 3, NOTE)
83ab3839
RH		 609#define NOTE_EH_HANDLER(INSN) XCINT(INSN, 3, NOTE)
610#define NOTE_RANGE_INFO(INSN) XCEXP(INSN, 3, NOTE)
611#define NOTE_LIVE_INFO(INSN) XCEXP(INSN, 3, NOTE)
612#define NOTE_BASIC_BLOCK(INSN) XCBBDEF(INSN, 3, NOTE)
994a57cd 613#define NOTE_EXPECTED_VALUE(INSN) XCEXP(INSN, 3, NOTE)
0dfa1860 614
6f29feb1
JW		 615/* In a NOTE that is a line number, this is the line number.
616 Other kinds of NOTEs are identified by negative numbers here. */
83ab3839 617#define NOTE_LINE_NUMBER(INSN) XCINT(INSN, 4, NOTE)
6f29feb1 618
589ca5cb
MM		 619/* Nonzero if INSN is a note marking the beginning of a basic block. */
620#define NOTE_INSN_BASIC_BLOCK_P(INSN) \
621 (GET_CODE (INSN) == NOTE \
622 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
623
6f29feb1 624/* Codes that appear in the NOTE_LINE_NUMBER field
a31efb86 625 for kinds of notes that are not line numbers.
6f29feb1 626
a31efb86
DE		 627 Notice that we do not try to use zero here for any of
628 the special note codes because sometimes the source line
629 actually can be zero! This happens (for example) when we
630 are generating code for the per-translation-unit constructor
631 and destructor routines for some C++ translation unit.
632
633 If you should change any of the following values, or if you
634 should add a new value here, don't forget to change the
635 note_insn_name array in rtl.c. */
6f29feb1 636
d636c18c
RH		 637enum insn_note
638{
639 /* Keep all of these numbers negative. Adjust as needed. */
640 NOTE_INSN_BIAS = -100,
641
642 /* This note is used to get rid of an insn
643 when it isn't safe to patch the insn out of the chain. */
644 NOTE_INSN_DELETED,
645
646 /* These are used to mark the beginning and end of a lexical block.
647 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
648 NOTE_INSN_BLOCK_BEG,
649 NOTE_INSN_BLOCK_END,
650
651 /* These mark the extremes of a loop. */
652 NOTE_INSN_LOOP_BEG,
653 NOTE_INSN_LOOP_END,
654
655 /* Generated at the place in a loop that `continue' jumps to. */
656 NOTE_INSN_LOOP_CONT,
657 /* Generated at the start of a duplicated exit test. */
658 NOTE_INSN_LOOP_VTOP,
659
660 /* This kind of note is generated at the end of the function body,
661 just before the return insn or return label. In an optimizing
662 compilation it is deleted by the first jump optimization, after
663 enabling that optimizer to determine whether control can fall
664 off the end of the function body without a return statement. */
665 NOTE_INSN_FUNCTION_END,
666
d636c18c
RH		 667 /* This marks the point immediately after the last prologue insn. */
668 NOTE_INSN_PROLOGUE_END,
669
670 /* This marks the point immediately prior to the first epilogue insn. */
671 NOTE_INSN_EPILOGUE_BEG,
672
673 /* Generated in place of user-declared labels when they are deleted. */
674 NOTE_INSN_DELETED_LABEL,
675
676 /* This note indicates the start of the real body of the function,
677 i.e. the point just after all of the parms have been moved into
678 their homes, etc. */
679 NOTE_INSN_FUNCTION_BEG,
680
681 /* These note where exception handling regions begin and end.
682 Uses NOTE_EH_HANDLER to identify the region in question. */
683 NOTE_INSN_EH_REGION_BEG,
684 NOTE_INSN_EH_REGION_END,
685
686 /* Generated whenever a duplicate line number note is output. For example,
687 one is output after the end of an inline function, in order to prevent
688 the line containing the inline call from being counted twice in gcov. */
b3b42a4d 689 NOTE_INSN_REPEATED_LINE_NUMBER,
d636c18c
RH		 690
691 /* Start/end of a live range region, where pseudos allocated on the stack
692 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */
b3b42a4d 693 NOTE_INSN_RANGE_BEG,
d636c18c
RH		 694 NOTE_INSN_RANGE_END,
695
696 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */
697 NOTE_INSN_LIVE,
698
699 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
700 NOTE_INSN_BASIC_BLOCK,
701
994a57cd
RH		 702 /* Record the expected value of a register at a location. Uses
703 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
704 NOTE_INSN_EXPECTED_VALUE,
705
d636c18c
RH		 706 NOTE_INSN_MAX
707};
10f07067 708
6f29feb1
JW		 709/* Names for NOTE insn's other than line numbers. */
710
d636c18c
RH		 711extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
712#define GET_NOTE_INSN_NAME(NOTE_CODE) \
dbbbbf3b 713 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
6f29feb1
JW		 714
715/* The name of a label, in case it corresponds to an explicit label
716 in the input source code. */
be1bb652 717#define LABEL_NAME(RTX) XCSTR(RTX, 6, CODE_LABEL)
6f29feb1
JW		 718
719/* In jump.c, each label contains a count of the number
720 of LABEL_REFs that point at it, so unused labels can be deleted. */
be1bb652 721#define LABEL_NUSES(RTX) XCINT(RTX, 3, CODE_LABEL)
6f29feb1 722
8cd0faaf
CM		 723/* Associate a name with a CODE_LABEL. */
724#define LABEL_ALTERNATE_NAME(RTX) XCSTR(RTX, 7, CODE_LABEL)
725
e9a25f70 726/* The original regno this ADDRESSOF was built for. */
770ae6cc 727#define ADDRESSOF_REGNO(RTX) XCUINT(RTX, 1, ADDRESSOF)
e9a25f70
JL		 728
729/* The variable in the register we took the address of. */
83ab3839 730#define ADDRESSOF_DECL(RTX) XCTREE(RTX, 2, ADDRESSOF)
e9a25f70 731
6f29feb1
JW		 732/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
733 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
734 be decremented and possibly the label can be deleted. */
83ab3839 735#define JUMP_LABEL(INSN) XCEXP(INSN, 7, JUMP_INSN)
6f29feb1
JW		 736
737/* Once basic blocks are found in flow.c,
738 each CODE_LABEL starts a chain that goes through
739 all the LABEL_REFs that jump to that label.
be1bb652
RH		 740 The chain eventually winds up at the CODE_LABEL: it is circular. */
741#define LABEL_REFS(LABEL) XCEXP(LABEL, 4, CODE_LABEL)
6f29feb1
JW		 742\f
743/* This is the field in the LABEL_REF through which the circular chain
744 of references to a particular label is linked.
745 This chain is set up in flow.c. */
746
83ab3839 747#define LABEL_NEXTREF(REF) XCEXP(REF, 1, LABEL_REF)
6f29feb1
JW		 748
749/* Once basic blocks are found in flow.c,
750 Each LABEL_REF points to its containing instruction with this field. */
751
83ab3839 752#define CONTAINING_INSN(RTX) XCEXP(RTX, 2, LABEL_REF)
6f29feb1 753
08394eef
BS		 754/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
755 the number the register originally had; for a pseudo register turned into
756 a hard reg this will hold the old pseudo register number. */
6f29feb1 757
770ae6cc 758#define REGNO(RTX) XCUINT(RTX, 0, REG)
08394eef 759#define ORIGINAL_REGNO(RTX) X0UINT(RTX, 1)
6f29feb1
JW		 760
761/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
762 is the current function's return value. */
763
764#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
765
766/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
767#define REG_USERVAR_P(RTX) ((RTX)->volatil)
768
3502dc9c
JDA		 769/* 1 in a REG rtx if the register is a pointer. */
770#define REG_POINTER(RTX) ((RTX)->frame_related)
771
cdbca172
JO		 772/* 1 if the given register REG corresponds to a hard register. */
773#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
774
775/* 1 if the given register number REG_NO corresponds to a hard register. */
776#define HARD_REGISTER_NUM_P(REG_NO) (REG_NO < FIRST_PSEUDO_REGISTER)
777
6f29feb1
JW		 778/* For a CONST_INT rtx, INTVAL extracts the integer. */
779
83ab3839 780#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
6f29feb1 781
a36556a8
ZW		 782/* For a CONST_DOUBLE:
783 The usual two ints that hold the value.
784 For a DImode, that is all there are;
785 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
786 For a float, the number of ints varies,
787 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
788 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
789#define CONST_DOUBLE_LOW(r) XCWINT (r, 2, CONST_DOUBLE)
790#define CONST_DOUBLE_HIGH(r) XCWINT (r, 3, CONST_DOUBLE)
791
792/* Link for chain of all CONST_DOUBLEs in use in current function. */
793#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 1, CONST_DOUBLE)
794/* The MEM which represents this CONST_DOUBLE's value in memory,
795 or const0_rtx if no MEM has been made for it yet,
796 or cc0_rtx if it is not on the chain. */
797#define CONST_DOUBLE_MEM(r) XCEXP (r, 0, CONST_DOUBLE)
798
6f29feb1 799/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
ddef6bc7 800 SUBREG_BYTE extracts the byte-number. */
6f29feb1 801
83ab3839 802#define SUBREG_REG(RTX) XCEXP(RTX, 0, SUBREG)
ddef6bc7
JJ		 803#define SUBREG_BYTE(RTX) XCUINT(RTX, 1, SUBREG)
804
805/* in rtlanal.c */
806extern unsigned int subreg_regno_offset PARAMS ((unsigned int,
807 enum machine_mode,
808 unsigned int,
809 enum machine_mode));
810extern unsigned int subreg_regno PARAMS ((rtx));
6f29feb1 811
07be3989
RK		 812/* 1 if the REG contained in SUBREG_REG is already known to be
813 sign- or zero-extended from the mode of the SUBREG to the mode of
814 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
f590cca1 815 extension.
07be3989
RK		 816
817 When used as a LHS, is means that this extension must be done
818 when assigning to SUBREG_REG. */
819
820#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
821#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
822
6f29feb1
JW		 823/* Access various components of an ASM_OPERANDS rtx. */
824
83ab3839
RH		 825#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR ((RTX), 0, ASM_OPERANDS)
826#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR ((RTX), 1, ASM_OPERANDS)
827#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT ((RTX), 2, ASM_OPERANDS)
828#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC ((RTX), 3, ASM_OPERANDS)
829#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC ((RTX), 4, ASM_OPERANDS)
830#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP ((RTX), 3, (N), ASM_OPERANDS)
831#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN ((RTX), 3, ASM_OPERANDS)
6462bb43
AO		 832#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
833 XCVECEXP ((RTX), 4, (N), ASM_OPERANDS)
3bdf5ad1
RK		 834#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
835 XSTR (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS), 0)
836#define ASM_OPERANDS_INPUT_MODE(RTX, N) \
837 GET_MODE (XCVECEXP ((RTX), 4, (N), ASM_OPERANDS))
83ab3839
RH		 838#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR ((RTX), 5, ASM_OPERANDS)
839#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT ((RTX), 6, ASM_OPERANDS)
6f29feb1
JW		 840
841/* For a MEM rtx, 1 if it's a volatile reference.
842 Also in an ASM_OPERANDS rtx. */
843#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
844
3bdf5ad1
RK		 845/* For a MEM rtx, 1 if it refers to an aggregate, either to the
846 aggregate itself of to a field of the aggregate. If zero, RTX may
4eb00163 847 or may not be such a reference. */
6f29feb1
JW		 848#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
849
c6df88cb
MM		 850/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
851 not refer to a scalar.*/
852#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
853
c6df88cb
MM		 854/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
855 RTX. Otherwise, vice versa. Use this macro only when you are
856 *sure* that you know that the MEM is in a structure, or is a
857 scalar. VAL is evaluated only once. */
f9e158c3
JM		 858#define MEM_SET_IN_STRUCT_P(RTX, VAL) do { \
859 if (VAL) \
860 { \
861 MEM_IN_STRUCT_P (RTX) = 1; \
862 MEM_SCALAR_P (RTX) = 0; \
863 } \
864 else \
865 { \
866 MEM_IN_STRUCT_P (RTX) = 0; \
867 MEM_SCALAR_P (RTX) = 1; \
868 } \
869} while (0)
c6df88cb 870
41472af8
MM		 871/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
872 set, and may alias anything. Otherwise, the MEM can only alias
873 MEMs in the same alias set. This value is set in a
874 language-dependent manner in the front-end, and should not be
875 altered in the back-end. These set numbers are tested for zero,
876 and compared for equality; they have no other significance. In
877 some front-ends, these numbers may correspond in some way to types,
878 or other language-level entities, but they need not, and the
879 back-end makes no such assumptions. */
3bdf5ad1
RK		 880#define MEM_ALIAS_SET(RTX) XCWINT(RTX, 1, MEM)
881
882/* Copy the attributes that apply to memory locations from RHS to LHS. */
883#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
884 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
885 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
886 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
887 MEM_ALIAS_SET (LHS) = MEM_ALIAS_SET (RHS), \
888 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS))
41472af8 889
6f29feb1
JW		 890/* For a LABEL_REF, 1 means that this reference is to a label outside the
891 loop containing the reference. */
892#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
893
adfaf10a 894/* For a LABEL_REF, 1 means it is for a nonlocal label. */
2a406d2a 895/* Likewise in an EXPR_LIST for a REG_LABEL note. */
adfaf10a
RS		 896#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
897
6f29feb1
JW		 898/* For a CODE_LABEL, 1 means always consider this label to be needed. */
899#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
900
901/* For a REG, 1 means the register is used only in an exit test of a loop. */
902#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
903
904/* During sched, for an insn, 1 means that the insn must be scheduled together
d45cf215 905 with the preceding insn. */
6f29feb1
JW		 906#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
907
c376c05b
TW		 908/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
909 cost of the dependence link. The cost of executing an instruction
910 may vary based on how the results are used. LINK_COST_ZERO is 1 when
911 the cost through the link varies and is unchanged (i.e., the link has
912 zero additional cost). LINK_COST_FREE is 1 when the cost through the
913 link is zero (i.e., the link makes the cost free). In other cases,
914 the adjustment to the cost is recomputed each time it is needed. */
915#define LINK_COST_ZERO(X) ((X)->jump)
916#define LINK_COST_FREE(X) ((X)->call)
917
6f29feb1
JW		 918/* For a SET rtx, SET_DEST is the place that is set
919 and SET_SRC is the value it is set to. */
83ab3839
RH		 920#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
921#define SET_SRC(RTX) XCEXP(RTX, 1, SET)
6f29feb1
JW		 922
923/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
83ab3839
RH		 924#define TRAP_CONDITION(RTX) XCEXP(RTX, 0, TRAP_IF)
925#define TRAP_CODE(RTX) XCEXP(RTX, 1, TRAP_IF)
6f29feb1 926
0c99ec5c
RH		 927/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
928 conditionally executing the code on, COND_EXEC_CODE is the code
929 to execute if the condition is true. */
930#define COND_EXEC_TEST(RTX) XCEXP(RTX, 0, COND_EXEC)
931#define COND_EXEC_CODE(RTX) XCEXP(RTX, 1, COND_EXEC)
932
6f29feb1
JW		 933/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
934#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
935
bd7cf17e
JJ		 936/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */
937#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related)
938
6f29feb1
JW		 939/* Flag in a SYMBOL_REF for machine-specific purposes. */
940#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
941
942/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
943#define SYMBOL_REF_USED(RTX) ((RTX)->used)
944
ff0b6b99
FS		 945/* 1 means a SYMBOL_REF is weak. */
946#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated)
947
6f29feb1
JW		 948/* Define a macro to look for REG_INC notes,
949 but save time on machines where they never exist. */
950
58e54c44
RS		 951/* Don't continue this line--convex cc version 4.1 would lose. */
952#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 953#define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
954#else
955#define FIND_REG_INC_NOTE(insn, reg) 0
956#endif
957
958/* Indicate whether the machine has any sort of auto increment addressing.
959 If not, we can avoid checking for REG_INC notes. */
960
58e54c44
RS		 961/* Don't continue this line--convex cc version 4.1 would lose. */
962#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
6f29feb1
JW		 963#define AUTO_INC_DEC
964#endif
0dfa1860 965
940da324
JL		 966#ifndef HAVE_PRE_INCREMENT
967#define HAVE_PRE_INCREMENT 0
968#endif
969
970#ifndef HAVE_PRE_DECREMENT
971#define HAVE_PRE_DECREMENT 0
972#endif
973
974#ifndef HAVE_POST_INCREMENT
975#define HAVE_POST_INCREMENT 0
976#endif
977
978#ifndef HAVE_POST_DECREMENT
979#define HAVE_POST_DECREMENT 0
980#endif
981
4b983fdc
RH		 982#ifndef HAVE_POST_MODIFY_DISP
983#define HAVE_POST_MODIFY_DISP 0
984#endif
985
986#ifndef HAVE_POST_MODIFY_REG
987#define HAVE_POST_MODIFY_REG 0
988#endif
989
990#ifndef HAVE_PRE_MODIFY_DISP
991#define HAVE_PRE_MODIFY_DISP 0
992#endif
993
994#ifndef HAVE_PRE_MODIFY_REG
995#define HAVE_PRE_MODIFY_REG 0
996#endif
997
6e01bd94
MH		 998
999/* Some architectures do not have complete pre/post increment/decrement
1000 instruction sets, or only move some modes efficiently. These macros
1001 allow us to tune autoincrement generation. */
1002
1003#ifndef USE_LOAD_POST_INCREMENT
1004#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1005#endif
1006
1007#ifndef USE_LOAD_POST_DECREMENT
1008#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1009#endif
1010
1011#ifndef USE_LOAD_PRE_INCREMENT
1012#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1013#endif
1014
1015#ifndef USE_LOAD_PRE_DECREMENT
1016#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1017#endif
1018
1019#ifndef USE_STORE_POST_INCREMENT
1020#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1021#endif
1022
1023#ifndef USE_STORE_POST_DECREMENT
1024#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1025#endif
1026
1027#ifndef USE_STORE_PRE_INCREMENT
1028#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1029#endif
1030
1031#ifndef USE_STORE_PRE_DECREMENT
1032#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1033#endif
1034
1035
0dfa1860
MM		 1036/* Accessors for RANGE_INFO. */
1037/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1038#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO)
0dfa1860
MM		 1039
1040/* For RANGE_{START,END} notes return the RANGE_START note. */
83ab3839 1041#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO)
0dfa1860
MM		 1042
1043/* For RANGE_{START,END} notes, return the vector containing the registers used
1044 in the range. */
83ab3839
RH		 1045#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO)
1046#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO)
1047#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO)
0dfa1860
MM		 1048
1049/* For RANGE_{START,END} notes, the number of calls within the range. */
83ab3839 1050#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO)
0dfa1860
MM		 1051
1052/* For RANGE_{START,END} notes, the number of insns within the range. */
83ab3839 1053#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO)
0dfa1860
MM		 1054
1055/* For RANGE_{START,END} notes, a unique # to identify this range. */
83ab3839 1056#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO)
0dfa1860
MM		 1057
1058/* For RANGE_{START,END} notes, the basic block # the range starts with. */
83ab3839 1059#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO)
0dfa1860
MM		 1060
1061/* For RANGE_{START,END} notes, the basic block # the range ends with. */
83ab3839 1062#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO)
0dfa1860
MM		 1063
1064/* For RANGE_{START,END} notes, the loop depth the range is in. */
83ab3839 1065#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO)
0dfa1860
MM		 1066
1067/* For RANGE_{START,END} notes, the bitmap of live registers at the start
1068 of the range. */
83ab3839 1069#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO)
0dfa1860
MM		 1070
1071/* For RANGE_{START,END} notes, the bitmap of live registers at the end
1072 of the range. */
83ab3839 1073#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO)
0dfa1860
MM		 1074
1075/* For RANGE_START notes, the marker # of the start of the range. */
83ab3839 1076#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO)
0dfa1860
MM		 1077
1078/* For RANGE_START notes, the marker # of the end of the range. */
83ab3839 1079#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO)
0dfa1860
MM		 1080
1081/* Original pseudo register # for a live range note. */
83ab3839 1082#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG)
0dfa1860
MM		 1083
1084/* Pseudo register # original register is copied into or -1. */
83ab3839 1085#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG)
0dfa1860
MM		 1086
1087/* How many times a register in a live range note was referenced. */
83ab3839 1088#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2)
0dfa1860
MM		 1089
1090/* How many times a register in a live range note was set. */
83ab3839 1091#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3)
0dfa1860
MM		 1092
1093/* How many times a register in a live range note died. */
83ab3839 1094#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4)
0dfa1860
MM		 1095
1096/* Whether the original value is needed to be copied into the range register at
1097 the start of the range. */
83ab3839 1098#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5)
0dfa1860
MM		 1099
1100/* # of insns the register copy is live over. */
83ab3839 1101#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6)
0dfa1860
MM		 1102
1103/* # of calls the register copy is live over. */
83ab3839 1104#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7)
0dfa1860
MM		 1105
1106/* DECL_NODE pointer of the declaration if the register is a user defined
1107 variable. */
83ab3839 1108#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8)
0dfa1860
MM		 1109
1110/* BLOCK_NODE pointer to the block the variable is declared in if the
1111 register is a user defined variable. */
83ab3839 1112#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9)
0dfa1860
MM		 1113
1114/* EXPR_LIST of the distinct ranges a variable is in. */
1115#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
1116
1117/* Block a variable is declared in. */
1118#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
1119
1120/* # of distinct ranges a variable is in. */
1121#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
1122
1123/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
1124#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
1125
1126/* For a NOTE_INSN_LIVE note, the original basic block number. */
1127#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
4e872036
AS		 1128
1129/* Determine if the insn is a PHI node. */
1130#define PHI_NODE_P(X) \
1131 (X && GET_CODE (X) == INSN \
1132 && GET_CODE (PATTERN (X)) == SET \
1133 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
6f29feb1 1134\f
bf6bb899
BS		 1135/* Nonzero if we need to distinguish between the return value of this function
1136 and the return value of a function called by this function. This helps
1137 integrate.c.
1138 This is 1 until after the rtl generation pass. */
1139extern int rtx_equal_function_value_matters;
1140
1b3d8f8a
GK		 1141/* Nonzero when we are generating CONCATs. */
1142extern int generating_concat_p;
1143
6f29feb1
JW		 1144/* Generally useful functions. */
1145
ac957f13 1146/* In expmed.c */
cdadb1dd 1147extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT));
5f4f0e22
CH		 1148
1149#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
1150
5f2d6cfa
MM		 1151/* In builtins.c */
1152extern rtx expand_builtin_expect_jump PARAMS ((union tree_node *, rtx, rtx));
1153
50b2596f 1154/* In explow.c */
c6991660 1155extern void set_stack_check_libfunc PARAMS ((rtx));
cdadb1dd 1156extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT,
7e4ce834 1157 enum machine_mode));
cdadb1dd
KG		 1158extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT));
1159extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT));
1160extern void optimize_save_area_alloca PARAMS ((rtx));
5f4f0e22 1161
4eb00163 1162/* In emit-rtl.c */
cdadb1dd 1163extern rtx gen_rtx PARAMS ((enum rtx_code,
bdea67fa 1164 enum machine_mode, ...));
cdadb1dd
KG		 1165extern rtvec gen_rtvec PARAMS ((int, ...));
1166
4eb00163 1167/* In other files */
cdadb1dd
KG		 1168extern rtx rtx_alloc PARAMS ((RTX_CODE));
1169extern rtvec rtvec_alloc PARAMS ((int));
1170extern rtx copy_insn_1 PARAMS ((rtx));
1171extern rtx copy_insn PARAMS ((rtx));
4eb00163
JO		 1172
1173/* In rtl.c */
cdadb1dd 1174extern rtx copy_rtx PARAMS ((rtx));
4eb00163
JO		 1175
1176/* In emit-rtl.c */
cdadb1dd 1177extern rtx copy_rtx_if_shared PARAMS ((rtx));
4eb00163
JO		 1178
1179/* In rtl.c */
cdadb1dd
KG		 1180extern rtx copy_most_rtx PARAMS ((rtx, rtx));
1181extern rtx shallow_copy_rtx PARAMS ((rtx));
1182extern int rtx_equal_p PARAMS ((rtx, rtx));
4eb00163
JO		 1183
1184/* In emit-rtl.c */
cdadb1dd
KG		 1185extern rtvec gen_rtvec_v PARAMS ((int, rtx *));
1186extern rtx gen_reg_rtx PARAMS ((enum machine_mode));
1187extern rtx gen_label_rtx PARAMS ((void));
ddef6bc7 1188extern int subreg_hard_regno PARAMS ((rtx, int));
cdadb1dd
KG		 1189extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx));
1190extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1191
1192/* In cse.c */
cdadb1dd 1193extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx));
4eb00163
JO		 1194
1195/* In emit-rtl.c */
cdadb1dd 1196extern rtx gen_highpart PARAMS ((enum machine_mode, rtx));
5222e470
JH		 1197extern rtx gen_highpart_mode PARAMS ((enum machine_mode,
1198 enum machine_mode, rtx));
cdadb1dd
KG		 1199extern rtx gen_realpart PARAMS ((enum machine_mode, rtx));
1200extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx));
770ae6cc
RK		 1201extern rtx operand_subword PARAMS ((rtx, unsigned int, int,
1202 enum machine_mode));
ddef6bc7
JJ		 1203extern rtx constant_subword PARAMS ((rtx, int,
1204 enum machine_mode));
4eb00163
JO		 1205
1206/* In emit-rtl.c */
770ae6cc
RK		 1207extern rtx operand_subword_force PARAMS ((rtx, unsigned int,
1208 enum machine_mode));
cdadb1dd 1209extern int subreg_lowpart_p PARAMS ((rtx));
e0e08ac2
JH		 1210extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode,
1211 enum machine_mode));
1212extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode,
1213 enum machine_mode));
cdadb1dd
KG		 1214extern rtx make_safe_from PARAMS ((rtx, rtx));
1215extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx));
cdadb1dd
KG		 1216extern rtx get_insns PARAMS ((void));
1217extern const char *get_insn_name PARAMS ((int));
1218extern rtx get_last_insn PARAMS ((void));
1219extern rtx get_last_insn_anywhere PARAMS ((void));
1220extern void start_sequence PARAMS ((void));
1221extern void push_to_sequence PARAMS ((rtx));
1222extern void end_sequence PARAMS ((void));
c14f7160
ML		 1223extern void push_to_full_sequence PARAMS ((rtx, rtx));
1224extern void end_full_sequence PARAMS ((rtx*, rtx*));
cdadb1dd 1225extern rtx gen_sequence PARAMS ((void));
4eb00163
JO		 1226
1227/* In varasm.c */
cdadb1dd
KG		 1228extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
1229extern rtx force_const_mem PARAMS ((enum machine_mode, rtx));
4eb00163 1230
4eb00163 1231/* In varasm.c */
cdadb1dd
KG		 1232extern rtx get_pool_constant PARAMS ((rtx));
1233extern enum machine_mode get_pool_mode PARAMS ((rtx));
1234extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx));
1235extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx));
1236extern int get_pool_offset PARAMS ((rtx));
1237extern rtx simplify_subtraction PARAMS ((rtx));
4eb00163
JO		 1238
1239/* In function.c */
cdadb1dd 1240extern rtx assign_stack_local PARAMS ((enum machine_mode,
e5e809f4 1241 HOST_WIDE_INT, int));
cdadb1dd 1242extern rtx assign_stack_temp PARAMS ((enum machine_mode,
e5e809f4 1243 HOST_WIDE_INT, int));
cdadb1dd 1244extern rtx assign_temp PARAMS ((union tree_node *,
e5e809f4 1245 int, int, int));
4eb00163 1246/* In emit-rtl.c */
cdadb1dd
KG		 1247extern rtx emit_insn_before PARAMS ((rtx, rtx));
1248extern rtx emit_jump_insn_before PARAMS ((rtx, rtx));
1249extern rtx emit_call_insn_before PARAMS ((rtx, rtx));
1250extern rtx emit_barrier_before PARAMS ((rtx));
1251extern rtx emit_label_before PARAMS ((rtx, rtx));
1252extern rtx emit_note_before PARAMS ((int, rtx));
1253extern rtx emit_insn_after PARAMS ((rtx, rtx));
1254extern rtx emit_jump_insn_after PARAMS ((rtx, rtx));
1255extern rtx emit_barrier_after PARAMS ((rtx));
1256extern rtx emit_label_after PARAMS ((rtx, rtx));
1257extern rtx emit_note_after PARAMS ((int, rtx));
3cce094d 1258extern rtx emit_line_note_after PARAMS ((const char *, int, rtx));
cdadb1dd
KG		 1259extern rtx emit_insn PARAMS ((rtx));
1260extern rtx emit_insns PARAMS ((rtx));
1261extern rtx emit_insns_before PARAMS ((rtx, rtx));
1262extern rtx emit_insns_after PARAMS ((rtx, rtx));
1263extern rtx emit_jump_insn PARAMS ((rtx));
1264extern rtx emit_call_insn PARAMS ((rtx));
1265extern rtx emit_label PARAMS ((rtx));
1266extern rtx emit_barrier PARAMS ((void));
3cce094d
KG		 1267extern rtx emit_line_note PARAMS ((const char *, int));
1268extern rtx emit_note PARAMS ((const char *, int));
1269extern rtx emit_line_note_force PARAMS ((const char *, int));
cdadb1dd
KG		 1270extern rtx make_insn_raw PARAMS ((rtx));
1271extern rtx previous_insn PARAMS ((rtx));
1272extern rtx next_insn PARAMS ((rtx));
1273extern rtx prev_nonnote_insn PARAMS ((rtx));
1274extern rtx next_nonnote_insn PARAMS ((rtx));
1275extern rtx prev_real_insn PARAMS ((rtx));
1276extern rtx next_real_insn PARAMS ((rtx));
1277extern rtx prev_active_insn PARAMS ((rtx));
1278extern rtx next_active_insn PARAMS ((rtx));
69732dcb 1279extern int active_insn_p PARAMS ((rtx));
cdadb1dd
KG		 1280extern rtx prev_label PARAMS ((rtx));
1281extern rtx next_label PARAMS ((rtx));
1282extern rtx next_cc0_user PARAMS ((rtx));
1283extern rtx prev_cc0_setter PARAMS ((rtx));
4eb00163
JO		 1284
1285/* In jump.c */
cdadb1dd
KG		 1286extern rtx next_nondeleted_insn PARAMS ((rtx));
1287extern enum rtx_code reverse_condition PARAMS ((enum rtx_code));
7913f3d0 1288extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code));
cdadb1dd
KG		 1289extern enum rtx_code swap_condition PARAMS ((enum rtx_code));
1290extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code));
1291extern enum rtx_code signed_condition PARAMS ((enum rtx_code));
1e5fd094 1292extern void mark_jump_label PARAMS ((rtx, rtx, int));
01f62f01 1293extern void cleanup_barriers PARAMS ((void));
4eb00163 1294
4eb00163 1295/* In jump.c */
cdadb1dd
KG		 1296extern rtx squeeze_notes PARAMS ((rtx, rtx));
1297extern rtx delete_insn PARAMS ((rtx));
1298extern void delete_jump PARAMS ((rtx));
1299extern void delete_barrier PARAMS ((rtx));
1300extern rtx get_label_before PARAMS ((rtx));
1301extern rtx get_label_after PARAMS ((rtx));
1302extern rtx follow_jumps PARAMS ((rtx));
4eb00163
JO		 1303
1304/* In recog.c */
b72f00af 1305extern rtx *find_constant_term_loc PARAMS ((rtx *));
4eb00163
JO		 1306
1307/* In emit-rtl.c */
cdadb1dd 1308extern rtx try_split PARAMS ((rtx, rtx, int));
6b24c259 1309extern int split_branch_probability;
4eb00163
JO		 1310
1311/* In unknown file */
cdadb1dd 1312extern rtx split_insns PARAMS ((rtx, rtx));
4eb00163
JO		 1313
1314/* In simplify-rtx.c */
d9c695ff
RK		 1315extern rtx simplify_unary_operation PARAMS ((enum rtx_code,
1316 enum machine_mode, rtx,
1317 enum machine_mode));
1318extern rtx simplify_binary_operation PARAMS ((enum rtx_code,
1319 enum machine_mode, rtx,
1320 rtx));
1321extern rtx simplify_ternary_operation PARAMS ((enum rtx_code,
1322 enum machine_mode,
1323 enum machine_mode, rtx, rtx,
1324 rtx));
1325extern rtx simplify_relational_operation PARAMS ((enum rtx_code,
1326 enum machine_mode, rtx,
1327 rtx));
1328extern rtx simplify_gen_binary PARAMS ((enum rtx_code,
1329 enum machine_mode,
1330 rtx, rtx));
1331extern rtx simplify_gen_unary PARAMS ((enum rtx_code,
1332 enum machine_mode, rtx,
1333 enum machine_mode));
1334extern rtx simplify_gen_ternary PARAMS ((enum rtx_code,
1335 enum machine_mode,
1336 enum machine_mode,
1337 rtx, rtx, rtx));
1338extern rtx simplify_gen_relational PARAMS ((enum rtx_code,
141e454b 1339 enum machine_mode,
d9c695ff
RK		 1340 enum machine_mode,
1341 rtx, rtx));
eea50aa0
JH		 1342extern rtx simplify_subreg PARAMS ((enum machine_mode,
1343 rtx,
1344 enum machine_mode,
1345 unsigned int));
949c5d62
JH		 1346extern rtx simplify_gen_subreg PARAMS ((enum machine_mode,
1347 rtx,
1348 enum machine_mode,
1349 unsigned int));
d9c695ff 1350extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx));
cdadb1dd 1351extern rtx simplify_rtx PARAMS ((rtx));
732910b9 1352extern rtx avoid_constant_pool_reference PARAMS ((rtx));
4eb00163 1353
4eb00163 1354/* In function.c */
cdadb1dd 1355extern rtx gen_mem_addressof PARAMS ((rtx, union tree_node *));
4eb00163 1356
4eb00163 1357/* In regclass.c */
770ae6cc
RK		 1358extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int,
1359 unsigned int));
4eb00163
JO		 1360
1361/* In emit-rtl.c */
cdadb1dd 1362extern void set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx));
9ae8ffe7 1363
e9a25f70
JL		 1364/* Functions in rtlanal.c */
1365
b1cdafbb
JH		 1366/* Single set is implemented as macro for performance reasons. */
1367#define single_set(I) (INSN_P (I) \
1368 ? (GET_CODE (PATTERN (I)) == SET \
1369 ? PATTERN (I) : single_set_1 (I)) \
1370 : NULL_RTX)
2130b7fb 1371#define single_set_1(I) single_set_2 (I, PATTERN (I))
b1cdafbb 1372
e38fe8e0 1373extern int rtx_addr_can_trap_p PARAMS ((rtx));
cdadb1dd 1374extern int rtx_unstable_p PARAMS ((rtx));
e38fe8e0
BS		 1375extern int rtx_varies_p PARAMS ((rtx, int));
1376extern int rtx_addr_varies_p PARAMS ((rtx, int));
cdadb1dd
KG		 1377extern HOST_WIDE_INT get_integer_term PARAMS ((rtx));
1378extern rtx get_related_value PARAMS ((rtx));
1379extern int reg_mentioned_p PARAMS ((rtx, rtx));
4b983fdc 1380extern int count_occurrences PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1381extern int reg_referenced_p PARAMS ((rtx, rtx));
1382extern int reg_used_between_p PARAMS ((rtx, rtx, rtx));
1383extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx));
1384extern int reg_set_between_p PARAMS ((rtx, rtx, rtx));
1385extern int regs_set_between_p PARAMS ((rtx, rtx, rtx));
e5c56fd9 1386extern int swap_commutative_operands_p PARAMS ((rtx, rtx));
cdadb1dd
KG		 1387extern int modified_between_p PARAMS ((rtx, rtx, rtx));
1388extern int no_labels_between_p PARAMS ((rtx, rtx));
1389extern int no_jumps_between_p PARAMS ((rtx, rtx));
1390extern int modified_in_p PARAMS ((rtx, rtx));
4eb00163 1391extern int insn_dependent_p PARAMS ((rtx, rtx));
cdadb1dd 1392extern int reg_set_p PARAMS ((rtx, rtx));
2130b7fb 1393extern rtx single_set_2 PARAMS ((rtx, rtx));
cdadb1dd 1394extern int multiple_sets PARAMS ((rtx));
7142e318 1395extern int set_noop_p PARAMS ((rtx));
0005550b 1396extern int noop_move_p PARAMS ((rtx));
cdadb1dd 1397extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int));
770ae6cc
RK		 1398extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int,
1399 rtx, rtx *));
cdadb1dd 1400extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx));
91b2d119 1401extern rtx set_of PARAMS ((rtx, rtx));
770ae6cc
RK		 1402extern void note_stores PARAMS ((rtx,
1403 void (*) (rtx, rtx, void *),
1404 void *));
e2373f95
RK		 1405extern void note_uses PARAMS ((rtx *,
1406 void (*) (rtx *, void *),
1407 void *));
cdadb1dd
KG		 1408extern rtx reg_set_last PARAMS ((rtx, rtx));
1409extern int dead_or_set_p PARAMS ((rtx, rtx));
770ae6cc 1410extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int));
cdadb1dd 1411extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx));
770ae6cc
RK		 1412extern rtx find_regno_note PARAMS ((rtx, enum reg_note,
1413 unsigned int));
d9c695ff 1414extern rtx find_reg_equal_equiv_note PARAMS ((rtx));
cdadb1dd 1415extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx));
770ae6cc
RK		 1416extern int find_regno_fusage PARAMS ((rtx, enum rtx_code,
1417 unsigned int));
cdadb1dd
KG		 1418extern void remove_note PARAMS ((rtx, rtx));
1419extern int side_effects_p PARAMS ((rtx));
1420extern int volatile_refs_p PARAMS ((rtx));
1421extern int volatile_insn_p PARAMS ((rtx));
1422extern int may_trap_p PARAMS ((rtx));
1423extern int inequality_comparisons_p PARAMS ((rtx));
1424extern rtx replace_rtx PARAMS ((rtx, rtx, rtx));
770ae6cc
RK		 1425extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int,
1426 int));
cdadb1dd
KG		 1427extern int computed_jump_p PARAMS ((rtx));
1428typedef int (*rtx_function) PARAMS ((rtx *, void *));
1429extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *));
770ae6cc 1430extern rtx regno_use_in PARAMS ((unsigned int, rtx));
cdadb1dd
KG		 1431extern int auto_inc_p PARAMS ((rtx));
1432extern void remove_node_from_expr_list PARAMS ((rtx, rtx *));
1433extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *));
db7ba742 1434extern int loc_mentioned_in_p PARAMS ((rtx *, rtx));
833366d6 1435extern rtx find_first_parameter_load PARAMS ((rtx, rtx));
6f29feb1 1436
ae0b51ef
JL		 1437/* flow.c */
1438
cdadb1dd
KG		 1439extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT));
1440void init_EXPR_INSN_LIST_cache PARAMS ((void));
1441void free_EXPR_LIST_list PARAMS ((rtx *));
1442void free_INSN_LIST_list PARAMS ((rtx *));
1443void free_EXPR_LIST_node PARAMS ((rtx));
1444void free_INSN_LIST_node PARAMS ((rtx));
1445rtx alloc_INSN_LIST PARAMS ((rtx, rtx));
1446rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx));
d9d4fb43 1447void clear_log_links PARAMS ((rtx));
ae0b51ef
JL		 1448
1449/* regclass.c */
1450
6f29feb1
JW		 1451/* Maximum number of parallel sets and clobbers in any insn in this fn.
1452 Always at least 3, since the combiner could put that many togetherm
1453 and we want this to remain correct for all the remaining passes. */
1454
1455extern int max_parallel;
1456
e0c6d139 1457/* Free up register info memory. */
cdadb1dd 1458extern void free_reg_info PARAMS ((void));
e0c6d139 1459
ae0b51ef 1460/* recog.c */
cdadb1dd 1461extern int asm_noperands PARAMS ((rtx));
3cce094d 1462extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **,
9b3142b3
KG		 1463 const char **,
1464 enum machine_mode *));
6f29feb1 1465
cdadb1dd
KG		 1466extern enum reg_class reg_preferred_class PARAMS ((int));
1467extern enum reg_class reg_alternate_class PARAMS ((int));
6f29feb1 1468
cdadb1dd 1469extern rtx get_first_nonparm_insn PARAMS ((void));
6f29feb1 1470
cdadb1dd 1471extern void split_all_insns PARAMS ((int));
6f862f2f 1472extern void split_all_insns_noflow PARAMS ((void));
6a73406e 1473
68d75312 1474#define MAX_SAVED_CONST_INT 64
5da077de 1475extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
68d75312 1476
5da077de
AS		 1477#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1478#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1479#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1480#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
6f29feb1 1481extern rtx const_true_rtx;
a8efe40d
RK		 1482
1483extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1484
f590cca1 1485/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
a8efe40d
RK		 1486 same as VOIDmode. */
1487
1488#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1489
1490/* Likewise, for the constants 1 and 2. */
1491
1492#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1493#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
6f29feb1 1494
5da077de
AS		 1495/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1496 is used to represent the frame pointer. This is because the
1497 hard frame pointer and the automatic variables are separated by an amount
1498 that cannot be determined until after register allocation. We can assume
1499 that in this case ELIMINABLE_REGS will be defined, one action of which
1500 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1501#ifndef HARD_FRAME_POINTER_REGNUM
1502#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1503#endif
1504
1505/* Index labels for global_rtl. */
1506enum global_rtl_index
68d75312 1507{
5da077de
AS		 1508 GR_PC,
1509 GR_CC0,
1510 GR_STACK_POINTER,
1511 GR_FRAME_POINTER,
1512/* For register elimination to work properly these hard_frame_pointer_rtx,
1513 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1514 the same register. */
1515#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1516 GR_ARG_POINTER = GR_FRAME_POINTER,
1517#endif
1518#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1519 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1520#else
1521 GR_HARD_FRAME_POINTER,
1522#endif
1523#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1524#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1525 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1526#else
1527 GR_ARG_POINTER,
1528#endif
1529#endif
1530 GR_VIRTUAL_INCOMING_ARGS,
1531 GR_VIRTUAL_STACK_ARGS,
1532 GR_VIRTUAL_STACK_DYNAMIC,
1533 GR_VIRTUAL_OUTGOING_ARGS,
1534 GR_VIRTUAL_CFA,
1535
1536 GR_MAX
1537};
1538
1539/* Pointers to standard pieces of rtx are stored here. */
1540extern rtx global_rtl[GR_MAX];
1541
1542/* Standard pieces of rtx, to be substituted directly into things. */
1543#define pc_rtx (global_rtl[GR_PC])
1544#define cc0_rtx (global_rtl[GR_CC0])
68d75312 1545
6f29feb1
JW		 1546/* All references to certain hard regs, except those created
1547 by allocating pseudo regs into them (when that's possible),
1548 go through these unique rtx objects. */
5da077de
AS		 1549#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1550#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1551#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1552#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
68d75312 1553
6f29feb1
JW		 1554extern rtx pic_offset_table_rtx;
1555extern rtx struct_value_rtx;
1556extern rtx struct_value_incoming_rtx;
1557extern rtx static_chain_rtx;
1558extern rtx static_chain_incoming_rtx;
07ebc930 1559extern rtx return_address_pointer_rtx;
3b80f6ca
RH		 1560
1561/* Include the RTL generation functions. */
1562
1563#ifndef NO_GENRTL_H
1564#include "genrtl.h"
1565#endif
1566
41472af8
MM		 1567/* There are some RTL codes that require special attention; the
1568 generation functions included above do the raw handling. If you
b4213325
MM		 1569 add to this list, modify special_rtx in gengenrtl.c as well. You
1570 should also modify gen_rtx to use the special function. */
3b80f6ca 1571
cdadb1dd 1572extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, rtx,
0133b7d9 1573 HOST_WIDE_INT, HOST_WIDE_INT));
cdadb1dd 1574extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT));
08394eef 1575extern rtx gen_raw_REG PARAMS ((enum machine_mode, int));
cdadb1dd 1576extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int));
ddef6bc7 1577extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int));
cdadb1dd 1578extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx));
3b80f6ca 1579
ddef6bc7
JJ		 1580extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx));
1581
aefdd5ab
JL		 1582/* We need the cast here to ensure that we get the same result both with
1583 and without prototypes. */
1584#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
3b80f6ca 1585
6f29feb1
JW		 1586/* Virtual registers are used during RTL generation to refer to locations into
1587 the stack frame when the actual location isn't known until RTL generation
1588 is complete. The routine instantiate_virtual_regs replaces these with
1589 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1590 a constant. */
1591
1592#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1593
1594/* This points to the first word of the incoming arguments passed on the stack,
1595 either by the caller or by the callee when pretending it was passed by the
1596 caller. */
1597
5da077de 1598#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
6f29feb1
JW		 1599
1600#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1601
60343c3b 1602/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
6f29feb1
JW		 1603 variable on the stack. Otherwise, it points to the first variable on
1604 the stack. */
1605
5da077de 1606#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
6f29feb1
JW		 1607
1608#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1609
1610/* This points to the location of dynamically-allocated memory on the stack
1611 immediately after the stack pointer has been adjusted by the amount
1612 desired. */
1613
5da077de 1614#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
6f29feb1
JW		 1615
1616#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1617
1618/* This points to the location in the stack at which outgoing arguments should
1619 be written when the stack is pre-pushed (arguments pushed using push
1620 insns always use sp). */
1621
5da077de 1622#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
6f29feb1
JW		 1623
1624#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1625
71038426
RH		 1626/* This points to the Canonical Frame Address of the function. This
1627 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1628 but is calculated relative to the arg pointer for simplicity; the
f590cca1 1629 frame pointer nor stack pointer are necessarily fixed relative to
71038426
RH		 1630 the CFA until after reload. */
1631
5da077de 1632#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
71038426
RH		 1633
1634#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1635
1636#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
6f29feb1 1637
848e0190
JH		 1638/* REGNUM never really appearing in the INSN stream. */
1639#define INVALID_REGNUM (~(unsigned int)0)
1640
cdadb1dd 1641extern rtx find_next_ref PARAMS ((rtx, rtx));
f837a861 1642
bd7cf17e 1643extern rtx output_constant_def PARAMS ((union tree_node *, int));
cdadb1dd 1644extern rtx immed_real_const PARAMS ((union tree_node *));
6f29feb1
JW		 1645
1646/* Define a default value for STORE_FLAG_VALUE. */
1647
1648#ifndef STORE_FLAG_VALUE
1649#define STORE_FLAG_VALUE 1
1650#endif
1651
0ea0e871
JL		 1652/* Nonzero after the second flow pass has completed.
1653 Set to 1 or 0 by toplev.c */
1654extern int flow2_completed;
1655
6f29feb1 1656/* Nonzero after end of reload pass.
0ea0e871 1657 Set to 1 or 0 by reload1.c. */
6f29feb1
JW		 1658
1659extern int reload_completed;
1660
1661/* Set to 1 while reload_as_needed is operating.
1662 Required by some machines to handle any generated moves differently. */
1663
1664extern int reload_in_progress;
1665
1666/* If this is nonzero, we do not bother generating VOLATILE
1667 around volatile memory references, and we are willing to
1668 output indirect addresses. If cse is to follow, we reject
1669 indirect addresses so a useful potential cse is generated;
1670 if it is used only once, instruction combination will produce
1671 the same indirect address eventually. */
1672extern int cse_not_expected;
1673
f1db3576
JL		 1674/* Set to nonzero before life analysis to indicate that it is unsafe to
1675 generate any new pseudo registers. */
1676extern int no_new_pseudos;
1677
f5118aa5 1678/* Translates rtx code to tree code, for those codes needed by
88efc60a
RK		 1679 REAL_ARITHMETIC. The function returns an int because the caller may not
1680 know what `enum tree_code' means. */
1681
cdadb1dd 1682extern int rtx_to_tree_code PARAMS ((enum rtx_code));
9ae8ffe7 1683
ac957f13 1684/* In tree.c */
ac957f13 1685struct obstack;
cdadb1dd 1686extern void gcc_obstack_init PARAMS ((struct obstack *));
1f8f4a0b 1687
ac957f13
JL		 1688/* In cse.c */
1689struct cse_basic_block_data;
f1c1dfc3
BS		 1690
1691/* Return the right cost to give to an operation
1692 to make the cost of the corresponding register-to-register instruction
1693 N times that of a fast register-to-register instruction. */
1694#define COSTS_N_INSNS(N) ((N) * 4)
1695
1696/* Maximum cost of a rtl expression. This value has the special meaning
1697 not to use an rtx with this cost under any circumstances. */
1698#define MAX_COST INT_MAX
1699
cdadb1dd 1700extern int rtx_cost PARAMS ((rtx, enum rtx_code));
01329426 1701extern int address_cost PARAMS ((rtx, enum machine_mode));
4793dca1 1702extern void delete_trivially_dead_insns PARAMS ((rtx, int, int));
ac957f13 1703#ifdef BUFSIZ
cdadb1dd 1704extern int cse_main PARAMS ((rtx, int, int, FILE *));
ac957f13 1705#endif
cdadb1dd 1706extern void cse_end_of_basic_block PARAMS ((rtx,
ac957f13
JL		 1707 struct cse_basic_block_data *,
1708 int, int, int));
1709
1710/* In jump.c */
cdadb1dd
KG		 1711extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code));
1712extern int condjump_p PARAMS ((rtx));
e4c85816
JH		 1713extern int any_condjump_p PARAMS ((rtx));
1714extern int any_uncondjump_p PARAMS ((rtx));
1715extern int safe_to_remove_jump_p PARAMS ((rtx));
1716extern rtx pc_set PARAMS ((rtx));
cdadb1dd
KG		 1717extern rtx condjump_label PARAMS ((rtx));
1718extern int simplejump_p PARAMS ((rtx));
1719extern int returnjump_p PARAMS ((rtx));
1720extern int onlyjump_p PARAMS ((rtx));
1721extern int sets_cc0_p PARAMS ((rtx));
2ea64f10 1722extern int invert_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1723extern int invert_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1724extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx));
1725extern int true_regnum PARAMS ((rtx));
2ea64f10 1726extern int redirect_jump_1 PARAMS ((rtx, rtx));
9ba11d5a 1727extern int redirect_jump PARAMS ((rtx, rtx, int));
cdadb1dd
KG		 1728extern void rebuild_jump_labels PARAMS ((rtx));
1729extern void thread_jumps PARAMS ((rtx, int, int));
cdadb1dd 1730extern int rtx_equal_for_thread_p PARAMS ((rtx, rtx, rtx));
cdadb1dd 1731extern int can_reverse_comparison_p PARAMS ((rtx, rtx));
ab94bc48
JH		 1732extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx));
1733extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code,
1734 rtx, rtx, rtx));
cdadb1dd
KG		 1735extern void delete_for_peephole PARAMS ((rtx, rtx));
1736extern int condjump_in_parallel_p PARAMS ((rtx));
1737extern void never_reached_warning PARAMS ((rtx));
0045d504
JH		 1738extern void purge_line_number_notes PARAMS ((rtx));
1739extern void copy_loop_headers PARAMS ((rtx));
14bf4a33 1740
ac957f13 1741/* In emit-rtl.c. */
cdadb1dd
KG		 1742extern int max_reg_num PARAMS ((void));
1743extern int max_label_num PARAMS ((void));
1744extern int get_first_label_num PARAMS ((void));
1745extern void delete_insns_since PARAMS ((rtx));
1746extern void mark_reg_pointer PARAMS ((rtx, int));
1747extern void mark_user_reg PARAMS ((rtx));
1748extern void reset_used_flags PARAMS ((rtx));
1749extern void reorder_insns PARAMS ((rtx, rtx, rtx));
1750extern int get_max_uid PARAMS ((void));
1751extern int in_sequence_p PARAMS ((void));
1752extern void force_next_line_note PARAMS ((void));
1753extern void clear_emit_caches PARAMS ((void));
1754extern void init_emit PARAMS ((void));
1755extern void init_emit_once PARAMS ((int));
1756extern void push_topmost_sequence PARAMS ((void));
1757extern void pop_topmost_sequence PARAMS ((void));
1758extern int subreg_realpart_p PARAMS ((rtx));
1759extern void reverse_comparison PARAMS ((rtx));
1760extern void set_new_first_and_last_insn PARAMS ((rtx, rtx));
1761extern void set_new_first_and_last_label_num PARAMS ((int, int));
1762extern void set_new_last_label_num PARAMS ((int));
d1b81779 1763extern void unshare_all_rtl_again PARAMS ((rtx));
cdadb1dd
KG		 1764extern void set_last_insn PARAMS ((rtx));
1765extern void link_cc0_insns PARAMS ((rtx));
1766extern void add_insn PARAMS ((rtx));
1767extern void add_insn_before PARAMS ((rtx, rtx));
1768extern void add_insn_after PARAMS ((rtx, rtx));
1769extern void remove_insn PARAMS ((rtx));
1770extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx));
1771extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx));
1772extern enum rtx_code classify_insn PARAMS ((rtx));
1773extern rtx emit PARAMS ((rtx));
a11759a3
JR		 1774/* Query and clear/ restore no_line_numbers. This is used by the
1775 switch / case handling in stmt.c to give proper line numbers in
1776 warnings about unreachable code. */
cdadb1dd
KG		 1777int force_line_numbers PARAMS ((void));
1778void restore_line_number_status PARAMS ((int old_value));
1779extern void renumber_insns PARAMS ((FILE *));
f8855270 1780extern void remove_unnecessary_notes PARAMS ((void));
ac957f13 1781
ac957f13 1782/* In combine.c */
770ae6cc
RK		 1783extern int combine_instructions PARAMS ((rtx, unsigned int));
1784extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int));
1785extern rtx remove_death PARAMS ((unsigned int, rtx));
ac957f13 1786#ifdef BUFSIZ
cdadb1dd
KG		 1787extern void dump_combine_stats PARAMS ((FILE *));
1788extern void dump_combine_total_stats PARAMS ((FILE *));
ac957f13
JL		 1789#endif
1790
1791/* In sched.c. */
1792#ifdef BUFSIZ
cdadb1dd 1793extern void schedule_insns PARAMS ((FILE *));
18e720b3 1794extern void schedule_ebbs PARAMS ((FILE *));
ac957f13 1795#endif
cdadb1dd 1796extern void fix_sched_param PARAMS ((const char *, const char *));
ac957f13
JL		 1797
1798/* In print-rtl.c */
47c10e9b 1799extern const char *print_rtx_head;
cdadb1dd
KG		 1800extern void debug_rtx PARAMS ((rtx));
1801extern void debug_rtx_list PARAMS ((rtx, int));
4c85a96d 1802extern void debug_rtx_range PARAMS ((rtx, rtx));
cdadb1dd 1803extern rtx debug_rtx_find PARAMS ((rtx, int));
ac957f13 1804#ifdef BUFSIZ
cdadb1dd 1805extern void print_rtl PARAMS ((FILE *, rtx));
75b7557d 1806extern void print_simple_rtl PARAMS ((FILE *, rtx));
cdadb1dd
KG		 1807extern int print_rtl_single PARAMS ((FILE *, rtx));
1808extern void print_inline_rtx PARAMS ((FILE *, rtx, int));
ac957f13
JL		 1809#endif
1810
1811/* In loop.c */
cdadb1dd
KG		 1812extern void init_loop PARAMS ((void));
1813extern rtx libcall_other_reg PARAMS ((rtx, rtx));
ac957f13 1814#ifdef BUFSIZ
1bf14ad7 1815extern void loop_optimize PARAMS ((rtx, FILE *, int));
ac957f13 1816#endif
cdadb1dd 1817extern void record_excess_regs PARAMS ((rtx, rtx, rtx *));
ac957f13
JL		 1818
1819/* In function.c */
cdadb1dd
KG		 1820extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx));
1821extern void thread_prologue_and_epilogue_insns PARAMS ((rtx));
1822extern int prologue_epilogue_contains PARAMS ((rtx));
0a1c58a2 1823extern int sibcall_epilogue_contains PARAMS ((rtx));
591ccf92 1824extern void preserve_rtl_expr_result PARAMS ((rtx));
cdadb1dd
KG		 1825extern void mark_temp_addr_taken PARAMS ((rtx));
1826extern void update_temp_slot_address PARAMS ((rtx, rtx));
cdadb1dd 1827extern void purge_addressof PARAMS ((rtx));
659e47fb 1828extern void purge_hard_subreg_sets PARAMS ((rtx));
ac957f13 1829
ac957f13 1830/* In stmt.c */
47ee9bcb 1831extern void set_file_and_line_for_stmt PARAMS ((const char *, int));
cdadb1dd
KG		 1832extern void expand_null_return PARAMS ((void));
1833extern void emit_jump PARAMS ((rtx));
1834extern int preserve_subexpressions_p PARAMS ((void));
ac957f13
JL		 1835
1836/* In expr.c */
3bdf5ad1
RK		 1837extern void move_by_pieces PARAMS ((rtx, rtx,
1838 unsigned HOST_WIDE_INT,
1839 unsigned int));
2e245dac 1840
ac957f13 1841/* In flow.c */
cdadb1dd 1842extern void recompute_reg_usage PARAMS ((rtx, int));
ac957f13 1843#ifdef BUFSIZ
cdadb1dd
KG		 1844extern void print_rtl_with_bb PARAMS ((FILE *, rtx));
1845extern void dump_flow_info PARAMS ((FILE *));
ac957f13
JL		 1846#endif
1847
1848/* In expmed.c */
cdadb1dd
KG		 1849extern void init_expmed PARAMS ((void));
1850extern void expand_inc PARAMS ((rtx, rtx));
1851extern void expand_dec PARAMS ((rtx, rtx));
1852extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx,
ac957f13
JL		 1853 unsigned HOST_WIDE_INT, rtx,
1854 int, int));
1855
50b2596f
KG		 1856/* In gcse.c */
1857#ifdef BUFSIZ
cdadb1dd 1858extern int gcse_main PARAMS ((rtx, FILE *));
50b2596f
KG		 1859#endif
1860
ac957f13 1861/* In global.c */
cdadb1dd 1862extern void mark_elimination PARAMS ((int, int));
ac957f13 1863#ifdef BUFSIZ
cdadb1dd
KG		 1864extern int global_alloc PARAMS ((FILE *));
1865extern void dump_global_regs PARAMS ((FILE *));
ac957f13 1866#endif
cab634f2 1867#ifdef HARD_CONST
cdadb1dd 1868extern void retry_global_alloc PARAMS ((int, HARD_REG_SET));
cab634f2 1869#endif
d29c259b 1870extern void build_insn_chain PARAMS ((rtx));
ac957f13
JL		 1871
1872/* In regclass.c */
cdadb1dd
KG		 1873extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class));
1874extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class));
1875extern void globalize_reg PARAMS ((int));
1876extern void init_regs PARAMS ((void));
1877extern void init_reg_sets PARAMS ((void));
1878extern void regset_release_memory PARAMS ((void));
1879extern void regclass_init PARAMS ((void));
1880extern void regclass PARAMS ((rtx, int, FILE *));
770ae6cc
RK		 1881extern void reg_scan PARAMS ((rtx, unsigned int, int));
1882extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int));
cdadb1dd
KG		 1883extern void fix_register PARAMS ((const char *, int, int));
1884
1885extern void delete_null_pointer_checks PARAMS ((rtx));
a157febd 1886
50b2596f
KG		 1887/* In regmove.c */
1888#ifdef BUFSIZ
cdadb1dd 1889extern void regmove_optimize PARAMS ((rtx, int, FILE *));
50b2596f 1890#endif
1e7f0a48 1891extern void combine_stack_adjustments PARAMS ((void));
50b2596f
KG		 1892
1893/* In reorg.c */
1894#ifdef BUFSIZ
cdadb1dd 1895extern void dbr_schedule PARAMS ((rtx, FILE *));
50b2596f
KG		 1896#endif
1897
ac957f13
JL		 1898/* In local-alloc.c */
1899#ifdef BUFSIZ
cdadb1dd 1900extern void dump_local_alloc PARAMS ((FILE *));
ac957f13 1901#endif
cdadb1dd
KG		 1902extern int local_alloc PARAMS ((void));
1903extern int function_invariant_p PARAMS ((rtx));
ac957f13 1904
ac957f13 1905/* In profile.c */
cdadb1dd 1906extern void init_branch_prob PARAMS ((const char *));
51891abe
JH		 1907extern void branch_prob PARAMS ((void));
1908extern void end_branch_prob PARAMS ((void));
cdadb1dd 1909extern void output_func_start_profiler PARAMS ((void));
ac957f13
JL		 1910
1911/* In reg-stack.c */
1912#ifdef BUFSIZ
cdadb1dd 1913extern void reg_to_stack PARAMS ((rtx, FILE *));
ac957f13 1914#endif
ac957f13
JL		 1915
1916/* In fold-const.c */
05bccae2
RK		 1917extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1918 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1919 unsigned HOST_WIDE_INT *,
1920 HOST_WIDE_INT *));
1921extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1922 unsigned HOST_WIDE_INT *,
1923 HOST_WIDE_INT *));
1924extern int mul_double PARAMS ((unsigned HOST_WIDE_INT,
1925 HOST_WIDE_INT,
1926 unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1927 unsigned HOST_WIDE_INT *,
1928 HOST_WIDE_INT *));
1929extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1930 HOST_WIDE_INT, unsigned int,
1931 unsigned HOST_WIDE_INT *,
1932 HOST_WIDE_INT *, int));
1933extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1934 HOST_WIDE_INT, unsigned int,
1935 unsigned HOST_WIDE_INT *,
1936 HOST_WIDE_INT *, int));
1937extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1938 HOST_WIDE_INT, unsigned int,
1939 unsigned HOST_WIDE_INT *,
1940 HOST_WIDE_INT *));
1941extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT,
1942 HOST_WIDE_INT, unsigned int,
1943 unsigned HOST_WIDE_INT *,
1944 HOST_WIDE_INT *));
ac957f13
JL		 1945
1946/* In calls.c */
ebb1b59a
BS		 1947enum libcall_type
1948{
1949 LCT_NORMAL = 0,
1950 LCT_CONST = 1,
1951 LCT_PURE = 2,
1952 LCT_CONST_MAKE_BLOCK = 3,
695ee791 1953 LCT_PURE_MAKE_BLOCK = 4,
9555a122
RH		 1954 LCT_NORETURN = 5,
1955 LCT_THROW = 6
ebb1b59a
BS		 1956};
1957
1958extern void emit_library_call PARAMS ((rtx, enum libcall_type,
1959 enum machine_mode, int,
1960 ...));
1961extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type,
1962 enum machine_mode, int,
1963 ...));
ac957f13
JL		 1964
1965/* In unroll.c */
cdadb1dd 1966extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx));
ac957f13
JL		 1967
1968/* In varasm.c */
cdadb1dd 1969extern int in_data_section PARAMS ((void));
cdadb1dd 1970extern void init_varasm_once PARAMS ((void));
ac957f13
JL		 1971
1972/* In rtl.c */
cdadb1dd 1973extern void init_rtl PARAMS ((void));
c25c12b8
R		 1974extern void traverse_md_constants PARAMS ((int (*) (void **, void *),
1975 void *));
1976struct md_constant { char *name, *value; };
ac957f13 1977
bcdaba58 1978#ifdef BUFSIZ
cdadb1dd
KG		 1979extern int read_skip_spaces PARAMS ((FILE *));
1980extern rtx read_rtx PARAMS ((FILE *));
bcdaba58
RH		 1981#endif
1982
1983extern const char *read_rtx_filename;
1984extern int read_rtx_lineno;
1985
987009bf
ZW		 1986/* Redefine abort to report an internal error w/o coredump, and
1987 reporting the location of the error in the source file. This logic
1988 is duplicated in rtl.h and tree.h because every file that needs the
1989 special abort includes one or both. toplev.h gets too few files,
1990 system.h gets too many. */
1991
cdadb1dd 1992extern void fancy_abort PARAMS ((const char *, int, const char *))
987009bf 1993 ATTRIBUTE_NORETURN;
fbfc1192 1994#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
987009bf 1995
ac957f13 1996/* In alias.c */
db048faf 1997extern rtx canon_rtx PARAMS ((rtx));
cdadb1dd 1998extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx,
e38fe8e0 1999 int (*)(rtx, int)));
a13d4ebf
AM		 2000extern rtx get_addr PARAMS ((rtx));
2001extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx,
2002 rtx, int (*)(rtx, int)));
cdadb1dd
KG		 2003extern int read_dependence PARAMS ((rtx, rtx));
2004extern int anti_dependence PARAMS ((rtx, rtx));
2005extern int output_dependence PARAMS ((rtx, rtx));
2006extern void mark_constant_function PARAMS ((void));
2007extern void init_alias_once PARAMS ((void));
2008extern void init_alias_analysis PARAMS ((void));
2009extern void end_alias_analysis PARAMS ((void));
cdadb1dd 2010extern rtx addr_side_effect_eval PARAMS ((rtx, int, int));
ba4828e0 2011extern void set_mem_alias_set PARAMS ((rtx, HOST_WIDE_INT));
4c649323 2012
0a1c58a2
JL		 2013/* In sibcall.c */
2014typedef enum {
2015 sibcall_use_normal = 1,
2016 sibcall_use_tail_recursion,
2017 sibcall_use_sibcall
2018} sibcall_use_t;
2019
2020extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void));
2021extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t));
2022
21b2cd73 2023#ifdef STACK_REGS
cdadb1dd 2024extern int stack_regs_mentioned PARAMS ((rtx insn));
21b2cd73
JH		 2025#endif
2026
a157febd 2027/* In toplev.c */
a157febd 2028extern rtx stack_limit_rtx;
dfdb644f 2029
7b82b5da 2030/* In regrename.c */
7b82b5da
SC		 2031extern void regrename_optimize PARAMS ((void));
2032
4db384c9 2033/* In ifcvt.c */
2ea64f10
RH		 2034extern void if_convert PARAMS ((int));
2035
4db384c9
JH		 2036/* In predict.c */
2037extern void invert_br_probabilities PARAMS ((rtx));
88657302 2038#endif /* ! GCC_RTL_H */
GNU Compiler Collection
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