1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
34 /* Value used by some passes to "recognize" noop moves as valid
36 #define NOOP_MOVE_INSN_CODE INT_MAX
38 /* Register Transfer Language EXPRESSIONS CODES */
40 #define RTX_CODE enum rtx_code
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
47 LAST_AND_UNUSED_RTX_CODE
}; /* A convenient way to get a value for
49 Assumes default enum value assignment. */
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
54 extern const unsigned char rtx_length
[NUM_RTX_CODE
];
55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
57 extern const char * const rtx_name
[NUM_RTX_CODE
];
58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
60 extern const char * const rtx_format
[NUM_RTX_CODE
];
61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
63 extern const char rtx_class
[NUM_RTX_CODE
];
64 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
66 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
67 relative to which the offsets are calculated, as explained in rtl.def. */
70 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
71 unsigned min_align
: 8;
73 unsigned base_after_vec
: 1; /* BASE is after the ADDR_DIFF_VEC. */
74 unsigned min_after_vec
: 1; /* minimum address target label is
75 after the ADDR_DIFF_VEC. */
76 unsigned max_after_vec
: 1; /* maximum address target label is
77 after the ADDR_DIFF_VEC. */
78 unsigned min_after_base
: 1; /* minimum address target label is
80 unsigned max_after_base
: 1; /* maximum address target label is
82 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
83 unsigned offset_unsigned
: 1; /* offsets have to be treated as unsigned. */
86 } addr_diff_vec_flags
;
88 /* Structure used to describe the attributes of a MEM. These are hashed
89 so MEMs that the same attributes share a data structure. This means
90 they cannot be modified in place. If any element is nonzero, it means
91 the value of the corresponding attribute is unknown. */
92 typedef struct mem_attrs
GTY(())
94 HOST_WIDE_INT alias
; /* Memory alias set. */
95 tree expr
; /* expr corresponding to MEM. */
96 rtx offset
; /* Offset from start of DECL, as CONST_INT. */
97 rtx size
; /* Size in bytes, as a CONST_INT. */
98 unsigned int align
; /* Alignment of MEM in bits. */
101 /* Common union for an element of an rtx. */
103 typedef union rtunion_def
105 HOST_WIDE_INT rtwint
;
111 enum machine_mode rttype
;
112 addr_diff_vec_flags rt_addr_diff_vec_flags
;
113 struct cselib_val_struct
*rt_cselib
;
114 struct bitmap_head_def
*rtbit
;
116 struct basic_block_def
*bb
;
120 /* RTL expression ("rtx"). */
124 /* The kind of expression this is. */
125 ENUM_BITFIELD(rtx_code
) code
: 16;
127 /* The kind of value the expression has. */
128 ENUM_BITFIELD(machine_mode
) mode
: 8;
130 /* 1 in a MEM if we should keep the alias set for this mem unchanged
131 when we access a component.
132 1 in a CALL_INSN if it is a sibling call.
133 1 in a SET that is for a return. */
134 unsigned int jump
: 1;
135 /* This flag is currently unused. */
136 unsigned int call
: 1;
137 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
138 1 in a SUBREG if it references an unsigned object whose mode has been
139 from a promoted to a wider mode.
140 1 in a SYMBOL_REF if it addresses something in the per-function
142 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
143 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
144 unsigned int unchanging
: 1;
145 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
146 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
147 if it has been deleted.
148 1 in a REG expression if corresponds to a variable declared by the user,
149 0 for an internally generated temporary.
150 1 in a SUBREG with a negative value.
151 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
152 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
153 unsigned int volatil
: 1;
154 /* 1 in a MEM referring to a field of an aggregate.
155 0 if the MEM was a variable or the result of a * operator in C;
156 1 if it was the result of a . or -> operator (on a struct) in C.
157 1 in a REG if the register is used only in exit code a loop.
158 1 in a SUBREG expression if was generated from a variable with a
160 1 in a CODE_LABEL if the label is used for nonlocal gotos
161 and must not be deleted even if its count is zero.
162 1 in a LABEL_REF if this is a reference to a label outside the
164 1 in an INSN, JUMP_INSN, CALL_INSN, CODE_LABEL, BARRIER, or NOTE if
165 this insn must be scheduled together with the preceding insn. Valid
167 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
168 from the target of a branch. Valid from reorg until end of compilation;
170 1 in an INSN or related rtx if this insn is dead code. Valid only during
171 dead-code elimination phase; cleared before use. */
172 unsigned int in_struct
: 1;
173 /* At the end of RTL generation, 1 if this rtx is used. This is used for
174 copying shared structure. See `unshare_all_rtl'.
175 In a REG, this is not needed for that purpose, and used instead
176 in `leaf_renumber_regs_insn'.
177 1 in a SYMBOL_REF, means that emit_library_call
178 has used it as the function. */
179 unsigned int used
: 1;
180 /* Nonzero if this rtx came from procedure integration.
181 1 in a REG means this reg refers to the return value
182 of the current function.
183 1 in a SYMBOL_REF if the symbol is weak. */
184 unsigned integrated
: 1;
185 /* 1 in an INSN or a SET if this rtx is related to the call frame,
186 either changing how we compute the frame address or saving and
187 restoring registers in the prologue and epilogue.
188 1 in a MEM if the MEM refers to a scalar, rather than a member of
190 1 in a REG if the register is a pointer.
191 1 in a SYMBOL_REF if it addresses something in the per-function
192 constant string pool. */
193 unsigned frame_related
: 1;
195 /* The first element of the operands of this rtx.
196 The number of operands and their types are controlled
197 by the `code' field, according to rtl.def. */
201 #define NULL_RTX (rtx) 0
203 /* Define macros to access the `code' field of the rtx. */
205 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
206 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
208 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
209 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
211 /* RTL vector. These appear inside RTX's when there is a need
212 for a variable number of things. The principle use is inside
213 PARALLEL expressions. */
215 struct rtvec_def
GTY(()) {
216 int num_elem
; /* number of elements */
217 rtx
GTY ((length ("%h.num_elem"))) elem
[1];
220 #define NULL_RTVEC (rtvec) 0
222 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
223 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
225 /* Predicate yielding nonzero iff X is an rtl for a register. */
226 #define REG_P(X) (GET_CODE (X) == REG)
228 /* Predicate yielding nonzero iff X is a label insn. */
229 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
231 /* Predicate yielding nonzero iff X is a jump insn. */
232 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
234 /* Predicate yielding nonzero iff X is a note insn. */
235 #define NOTE_P(X) (GET_CODE (X) == NOTE)
237 /* Predicate yielding nonzero iff X is a barrier insn. */
238 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
240 /* Predicate yielding nonzero iff X is cc0. */
242 #define CC0_P(X) ((X) == cc0_rtx)
247 /* Predicate yielding nonzero iff X is a data for a jump table. */
248 #define JUMP_TABLE_DATA_P(INSN) \
249 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
250 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
252 /* 1 if X is a constant value that is an integer. */
254 #define CONSTANT_P(X) \
255 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
256 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
257 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
258 || GET_CODE (X) == CONST_VECTOR \
259 || GET_CODE (X) == CONSTANT_P_RTX)
261 /* General accessor macros for accessing the fields of an rtx. */
263 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
264 /* The bit with a star outside the statement expr and an & inside is
265 so that N can be evaluated only once. */
266 #define RTL_CHECK1(RTX, N, C1) __extension__ \
267 (*({ rtx const _rtx = (RTX); const int _n = (N); \
268 const enum rtx_code _code = GET_CODE (_rtx); \
269 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
270 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
272 if (GET_RTX_FORMAT(_code)[_n] != C1) \
273 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
277 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
278 (*({ rtx const _rtx = (RTX); const int _n = (N); \
279 const enum rtx_code _code = GET_CODE (_rtx); \
280 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
281 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
283 if (GET_RTX_FORMAT(_code)[_n] != C1 \
284 && GET_RTX_FORMAT(_code)[_n] != C2) \
285 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
289 #define RTL_CHECKC1(RTX, N, C) __extension__ \
290 (*({ rtx const _rtx = (RTX); const int _n = (N); \
291 if (GET_CODE (_rtx) != (C)) \
292 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
296 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
297 (*({ rtx const _rtx = (RTX); const int _n = (N); \
298 const enum rtx_code _code = GET_CODE (_rtx); \
299 if (_code != (C1) && _code != (C2)) \
300 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
304 #define RTVEC_ELT(RTVEC, I) __extension__ \
305 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
306 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
307 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
309 &_rtvec->elem[_i]; }))
311 extern void rtl_check_failed_bounds
PARAMS ((rtx
, int,
312 const char *, int, const char *))
314 extern void rtl_check_failed_type1
PARAMS ((rtx
, int, int,
315 const char *, int, const char *))
317 extern void rtl_check_failed_type2
PARAMS ((rtx
, int, int, int,
318 const char *, int, const char *))
320 extern void rtl_check_failed_code1
PARAMS ((rtx
, enum rtx_code
,
321 const char *, int, const char *))
323 extern void rtl_check_failed_code2
PARAMS ((rtx
, enum rtx_code
, enum rtx_code
,
324 const char *, int, const char *))
326 extern void rtvec_check_failed_bounds
PARAMS ((rtvec
, int,
327 const char *, int, const char *))
330 #else /* not ENABLE_RTL_CHECKING */
332 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
333 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
334 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
335 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
336 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
340 /* General accessor macros for accessing the flags of an rtx. */
342 /* Access an individual rtx flag, with no checking of any kind. */
343 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
345 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
346 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
347 ({ rtx const _rtx = (RTX); \
348 if (GET_CODE(_rtx) != C1) \
349 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
353 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
354 ({ rtx const _rtx = (RTX); \
355 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
356 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
360 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
361 ({ rtx const _rtx = (RTX); \
362 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
363 && GET_CODE(_rtx) != C3) \
364 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
368 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
369 ({ rtx const _rtx = (RTX); \
370 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
371 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
372 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
376 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
377 ({ rtx const _rtx = (RTX); \
378 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
379 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
380 && GET_CODE(_rtx) != C5) \
381 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
385 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
387 ({ rtx const _rtx = (RTX); \
388 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
389 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
390 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
391 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
395 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
397 ({ rtx const _rtx = (RTX); \
398 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
399 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
400 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
401 && GET_CODE(_rtx) != C7) \
402 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
406 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
408 ({ rtx const _rtx = (RTX); \
409 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
410 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
411 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
412 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
413 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
417 extern void rtl_check_failed_flag
PARAMS ((const char *, rtx
, const char *,
422 #else /* not ENABLE_RTL_FLAG_CHECKING */
424 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
425 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
426 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
427 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
428 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
429 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
430 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
431 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
434 #define CLEAR_RTX_FLAGS(RTX) \
436 rtx const _rtx = (RTX); \
438 _rtx->frame_related = 0; \
439 _rtx->in_struct = 0; \
440 _rtx->integrated = 0; \
442 _rtx->unchanging = 0; \
447 #define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
448 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
449 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
450 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
451 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
452 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
453 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
454 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
455 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
456 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
458 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
459 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
461 /* These are like XWINT, etc. except that they expect a '0' field instead
462 of the normal type code. */
464 #define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
465 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
466 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
467 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
468 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
469 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
470 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
471 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
472 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
473 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
474 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
475 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
476 #define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem)
478 #define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
479 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
480 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
481 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
482 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
483 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
484 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
485 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
486 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
487 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
488 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
489 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
491 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
492 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
494 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
496 /* ACCESS MACROS for particular fields of insns. */
498 /* Determines whether X is an insn. */
499 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
501 /* Holds a unique number for each insn.
502 These are not necessarily sequentially increasing. */
503 #define INSN_UID(INSN) XINT (INSN, 0)
505 /* Chain insns together in sequence. */
506 #define PREV_INSN(INSN) XEXP (INSN, 1)
507 #define NEXT_INSN(INSN) XEXP (INSN, 2)
509 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
510 #define INSN_SCOPE(INSN) XTREE (INSN, 4)
511 /* The body of an insn. */
512 #define PATTERN(INSN) XEXP (INSN, 5)
514 /* Code number of instruction, from when it was recognized.
515 -1 means this instruction has not been recognized yet. */
516 #define INSN_CODE(INSN) XINT (INSN, 6)
518 /* Set up in flow.c; empty before then.
519 Holds a chain of INSN_LIST rtx's whose first operands point at
520 previous insns with direct data-flow connections to this one.
521 That means that those insns set variables whose next use is in this insn.
522 They are always in the same basic block as this insn. */
523 #define LOG_LINKS(INSN) XEXP(INSN, 7)
525 #define RTX_INTEGRATED_P(RTX) \
526 (RTL_FLAG_CHECK8("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \
527 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \
529 #define RTX_UNCHANGING_P(RTX) \
530 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
531 #define RTX_FRAME_RELATED_P(RTX) \
532 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
533 JUMP_INSN, BARRIER, SET)->frame_related)
535 /* 1 if RTX is an insn that has been deleted. */
536 #define INSN_DELETED_P(RTX) \
537 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
538 CODE_LABEL, BARRIER, NOTE)->volatil)
540 /* 1 if RTX is a call to a const or pure function. */
541 #define CONST_OR_PURE_CALL_P(RTX) \
542 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
543 EXPR_LIST)->unchanging)
545 /* 1 if RTX is a call_insn for a sibling call. */
546 #define SIBLING_CALL_P(RTX) \
547 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
549 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
550 #define INSN_ANNULLED_BRANCH_P(RTX) \
551 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
553 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
554 elimination phase. */
555 #define INSN_DEAD_CODE_P(RTX) \
556 (RTL_FLAG_CHECK1("INSN_DEAD_CODE_P", (RTX), INSN)->in_struct)
558 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
559 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
560 executed if the branch is taken. For annulled branches with this bit
561 clear, the insn should be executed only if the branch is not taken. */
562 #define INSN_FROM_TARGET_P(RTX) \
563 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
565 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
567 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
569 /* Holds a list of notes on what this insn does to various REGs.
570 It is a chain of EXPR_LIST rtx's, where the second operand is the
571 chain pointer and the first operand is the REG being described.
572 The mode field of the EXPR_LIST contains not a real machine mode
573 but a value from enum reg_note. */
575 #define REG_NOTES(INSN) XEXP(INSN, 8)
577 /* Don't forget to change reg_note_name in rtl.c. */
580 /* The value in REG dies in this insn (i.e., it is not needed past
581 this insn). If REG is set in this insn, the REG_DEAD note may,
582 but need not, be omitted. */
585 /* The REG is autoincremented or autodecremented. */
588 /* Describes the insn as a whole; it says that the insn sets a register
589 to a constant value or to be equivalent to a memory address. If the
590 register is spilled to the stack then the constant value should be
591 substituted for it. The contents of the REG_EQUIV is the constant
592 value or memory address, which may be different from the source of
593 the SET although it has the same value. A REG_EQUIV note may also
594 appear on an insn which copies a register parameter to a pseudo-register,
595 if there is a memory address which could be used to hold that
596 pseudo-register throughout the function. */
599 /* Like REG_EQUIV except that the destination is only momentarily equal
600 to the specified rtx. Therefore, it cannot be used for substitution;
601 but it can be used for cse. */
604 /* The register set in this insn held 0 before the insn. The contents of
605 the note is the insn that stored the 0. If that insn is deleted or
606 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
607 is actually an INSN_LIST, not an EXPR_LIST. */
610 /* This insn copies the return-value of a library call out of the hard reg
611 for return values. This note is actually an INSN_LIST and it points to
612 the first insn involved in setting up arguments for the call. flow.c
613 uses this to delete the entire library call when its result is dead. */
616 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
617 and points at the one that has the REG_RETVAL. This note is also an
621 /* The register is always nonnegative during the containing loop. This is
622 used in branches so that decrement and branch instructions terminating
623 on zero can be matched. There must be an insn pattern in the md file
624 named `decrement_and_branch_until_zero' or else this will never be added
625 to any instructions. */
628 /* There is no conflict *after this insn* between the register in the note
629 and the destination of this insn. */
632 /* Identifies a register set in this insn and never used. */
635 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
636 respectively. Normally, these are required to be consecutive insns, but
637 we permit putting a cc0-setting insn in the delay slot of a branch as
638 long as only one copy of the insn exists. In that case, these notes
639 point from one to the other to allow code generation to determine what
640 any require information and to properly update CC_STATUS. These notes
642 REG_CC_SETTER
, REG_CC_USER
,
644 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
645 CODE_LABEL contained in the REG_LABEL note is used by the insn.
646 This note is an INSN_LIST. */
649 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
650 write-after-read and write-after-write dependencies respectively.
651 Data dependencies, which are the only type of LOG_LINK created by
652 flow, are represented by a 0 reg note kind. */
653 REG_DEP_ANTI
, REG_DEP_OUTPUT
,
655 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
656 It has an integer value. For jumps, it is the probability that this is a
657 taken branch. For calls, it is the probability that this call won't
661 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and
662 the first insn after each CALL_INSN. It indicates how many times this
663 block was executed. */
666 /* Attached to a call insn; indicates that the call is malloc-like and
667 that the pointer returned cannot alias anything else. */
670 /* Used to optimize rtl generated by dynamic stack allocations for targets
671 where SETJMP_VIA_SAVE_AREA is true. */
674 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
675 CONCAT of two integer value. First specifies the branch predictor
676 that added the note, second specifies the predicted hitrate of branch
677 in the same format as REG_BR_PROB note uses. */
680 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
681 for DWARF to interpret what they imply. The attached rtx is used
682 instead of intuition. */
683 REG_FRAME_RELATED_EXPR
,
685 /* Indicates that REG holds the exception context for the function.
686 This context is shared by inline functions, so the code to acquire
687 the real exception context is delayed until after inlining. */
690 /* Indicates what exception region an INSN belongs in. This is used to
691 indicate what region to which a call may throw. REGION 0 indicates
692 that a call cannot throw at all. REGION -1 indicates that it cannot
693 throw, nor will it execute a non-local goto. */
696 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
699 /* Indicates that this insn (which is part of the prologue) computes
700 a value which might not be used later, and if so it's OK to delete
701 the insn. Normally, deleting any insn in the prologue is an error.
702 At present the parameter is unused and set to (const_int 0). */
705 /* Indicates that a call does not return. */
708 /* Indicates that an indirect jump is a non-local goto instead of a
712 /* This kind of note is generated at each to `setjmp',
713 and similar functions that can return twice. */
716 /* Indicate calls that always returns. */
719 /* Indicate that the memory load references a vtable. The expression
720 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
724 /* The base value for branch probability notes. */
725 #define REG_BR_PROB_BASE 10000
727 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
728 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
729 #define PUT_REG_NOTE_KIND(LINK, KIND) \
730 PUT_MODE (LINK, (enum machine_mode) (KIND))
732 /* Names for REG_NOTE's in EXPR_LIST insn's. */
734 extern const char * const reg_note_name
[];
735 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
737 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
738 USE and CLOBBER expressions.
739 USE expressions list the registers filled with arguments that
740 are passed to the function.
741 CLOBBER expressions document the registers explicitly clobbered
743 Pseudo registers can not be mentioned in this list. */
744 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
746 /* The label-number of a code-label. The assembler label
747 is made from `L' and the label-number printed in decimal.
748 Label numbers are unique in a compilation. */
749 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
751 #define LINE_NUMBER NOTE
753 /* In a NOTE that is a line number, this is a string for the file name that the
754 line is in. We use the same field to record block numbers temporarily in
755 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
756 between ints and pointers if we use a different macro for the block number.)
759 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
760 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
761 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
762 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
763 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
764 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
766 /* In a NOTE that is a line number, this is the line number.
767 Other kinds of NOTEs are identified by negative numbers here. */
768 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
770 /* Nonzero if INSN is a note marking the beginning of a basic block. */
771 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
772 (GET_CODE (INSN) == NOTE \
773 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
775 /* Algorithm and flags for prediction. */
776 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
777 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
778 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
780 /* Codes that appear in the NOTE_LINE_NUMBER field
781 for kinds of notes that are not line numbers.
783 Notice that we do not try to use zero here for any of
784 the special note codes because sometimes the source line
785 actually can be zero! This happens (for example) when we
786 are generating code for the per-translation-unit constructor
787 and destructor routines for some C++ translation unit.
789 If you should change any of the following values, or if you
790 should add a new value here, don't forget to change the
791 note_insn_name array in rtl.c. */
795 /* Keep all of these numbers negative. Adjust as needed. */
796 NOTE_INSN_BIAS
= -100,
798 /* This note is used to get rid of an insn
799 when it isn't safe to patch the insn out of the chain. */
802 /* These are used to mark the beginning and end of a lexical block.
803 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
807 /* These mark the extremes of a loop. */
811 /* Generated at the place in a loop that `continue' jumps to. */
813 /* Generated at the start of a duplicated exit test. */
816 /* Generated at the end of a conditional at the top of the loop.
817 This is used to perform a lame form of loop rotation in lieu
818 of actually understanding the loop structure. The note is
819 discarded after rotation is complete. */
820 NOTE_INSN_LOOP_END_TOP_COND
,
822 /* This kind of note is generated at the end of the function body,
823 just before the return insn or return label. In an optimizing
824 compilation it is deleted by the first jump optimization, after
825 enabling that optimizer to determine whether control can fall
826 off the end of the function body without a return statement. */
827 NOTE_INSN_FUNCTION_END
,
829 /* This marks the point immediately after the last prologue insn. */
830 NOTE_INSN_PROLOGUE_END
,
832 /* This marks the point immediately prior to the first epilogue insn. */
833 NOTE_INSN_EPILOGUE_BEG
,
835 /* Generated in place of user-declared labels when they are deleted. */
836 NOTE_INSN_DELETED_LABEL
,
838 /* This note indicates the start of the real body of the function,
839 i.e. the point just after all of the parms have been moved into
841 NOTE_INSN_FUNCTION_BEG
,
843 /* These note where exception handling regions begin and end.
844 Uses NOTE_EH_HANDLER to identify the region in question. */
845 NOTE_INSN_EH_REGION_BEG
,
846 NOTE_INSN_EH_REGION_END
,
848 /* Generated whenever a duplicate line number note is output. For example,
849 one is output after the end of an inline function, in order to prevent
850 the line containing the inline call from being counted twice in gcov. */
851 NOTE_INSN_REPEATED_LINE_NUMBER
,
853 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
854 NOTE_INSN_BASIC_BLOCK
,
856 /* Record the expected value of a register at a location. Uses
857 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
858 NOTE_INSN_EXPECTED_VALUE
,
860 /* Record a prediction. Uses NOTE_PREDICTION. */
861 NOTE_INSN_PREDICTION
,
866 /* Names for NOTE insn's other than line numbers. */
868 extern const char * const note_insn_name
[NOTE_INSN_MAX
- NOTE_INSN_BIAS
];
869 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
870 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
872 /* The name of a label, in case it corresponds to an explicit label
873 in the input source code. */
874 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
876 /* In jump.c, each label contains a count of the number
877 of LABEL_REFs that point at it, so unused labels can be deleted. */
878 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
880 /* Associate a name with a CODE_LABEL. */
881 #define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 8, CODE_LABEL)
883 /* The original regno this ADDRESSOF was built for. */
884 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
886 /* The variable in the register we took the address of. */
887 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
889 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
890 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
891 be decremented and possibly the label can be deleted. */
892 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
894 /* Once basic blocks are found in flow.c,
895 each CODE_LABEL starts a chain that goes through
896 all the LABEL_REFs that jump to that label.
897 The chain eventually winds up at the CODE_LABEL: it is circular. */
898 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
900 /* This is the field in the LABEL_REF through which the circular chain
901 of references to a particular label is linked.
902 This chain is set up in flow.c. */
904 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
906 /* Once basic blocks are found in flow.c,
907 Each LABEL_REF points to its containing instruction with this field. */
909 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
911 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
912 the number the register originally had; for a pseudo register turned into
913 a hard reg this will hold the old pseudo register number. */
915 #define REGNO(RTX) XCUINT (RTX, 0, REG)
916 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
918 /* 1 if RTX is a reg that is the current function's return value. */
919 #define REG_FUNCTION_VALUE_P(RTX) \
920 (RTL_FLAG_CHECK1("REG_FUNCTION_VALUE_P", (RTX), REG)->integrated)
922 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
923 #define REG_USERVAR_P(RTX) \
924 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
926 /* 1 if RTX is a reg that holds a pointer value. */
927 #define REG_POINTER(RTX) \
928 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
930 /* 1 if the given register REG corresponds to a hard register. */
931 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
933 /* 1 if the given register number REG_NO corresponds to a hard register. */
934 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
936 /* For a CONST_INT rtx, INTVAL extracts the integer. */
938 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
940 /* For a CONST_DOUBLE:
941 The usual two ints that hold the value.
942 For a DImode, that is all there are;
943 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
944 For a float, the number of ints varies,
945 and CONST_DOUBLE_LOW is the one that should come first *in memory*.
946 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
947 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
948 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
950 /* For a CONST_VECTOR, return element #n. */
951 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
953 /* For a CONST_VECTOR, return the number of elements in a vector. */
954 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
956 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
957 SUBREG_BYTE extracts the byte-number. */
959 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
960 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
963 extern unsigned int subreg_lsb
PARAMS ((rtx
));
964 extern unsigned int subreg_regno_offset
PARAMS ((unsigned int,
968 extern unsigned int subreg_regno
PARAMS ((rtx
));
970 /* 1 if RTX is a subreg containing a reg that is already known to be
971 sign- or zero-extended from the mode of the subreg to the mode of
972 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
975 When used as a LHS, is means that this extension must be done
976 when assigning to SUBREG_REG. */
978 #define SUBREG_PROMOTED_VAR_P(RTX) \
979 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
981 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
983 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
988 _rtx->unchanging = (VAL); \
991 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
992 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
993 ? -1 : (RTX)->unchanging)
995 /* Access various components of an ASM_OPERANDS rtx. */
997 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
998 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
999 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1000 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1001 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1002 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1003 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1004 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1005 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1006 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1007 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1008 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1009 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1010 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1011 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1013 /* 1 if RTX is a mem and we should keep the alias set for this mem
1014 unchanged when we access a component. Set to 1, or example, when we
1015 are already in a non-addressable component of an aggregate. */
1016 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1017 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1019 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1020 #define MEM_VOLATILE_P(RTX) \
1021 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1022 ASM_INPUT)->volatil)
1024 /* 1 if RTX is a mem that refers to an aggregate, either to the
1025 aggregate itself of to a field of the aggregate. If zero, RTX may
1026 or may not be such a reference. */
1027 #define MEM_IN_STRUCT_P(RTX) \
1028 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1030 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may
1031 not refer to a scalar. */
1032 #define MEM_SCALAR_P(RTX) \
1033 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related)
1035 /* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1036 RTX. Otherwise, vice versa. Use this macro only when you are
1037 *sure* that you know that the MEM is in a structure, or is a
1038 scalar. VAL is evaluated only once. */
1039 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1043 MEM_IN_STRUCT_P (RTX) = 1; \
1044 MEM_SCALAR_P (RTX) = 0; \
1048 MEM_IN_STRUCT_P (RTX) = 0; \
1049 MEM_SCALAR_P (RTX) = 1; \
1053 /* The memory attribute block. We provide access macros for each value
1054 in the block and provide defaults if none specified. */
1055 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1057 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1058 set, and may alias anything. Otherwise, the MEM can only alias
1059 MEMs in the same alias set. This value is set in a
1060 language-dependent manner in the front-end, and should not be
1061 altered in the back-end. These set numbers are tested for zero,
1062 and compared for equality; they have no other significance. In
1063 some front-ends, these numbers may correspond in some way to types,
1064 or other language-level entities, but they need not, and the
1065 back-end makes no such assumptions. */
1066 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1068 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1069 refer to part of a DECL. It may also be a COMPONENT_REF. */
1070 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1072 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1073 RTX that is always a CONST_INT. */
1074 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1076 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1077 is always a CONST_INT. */
1078 #define MEM_SIZE(RTX) \
1079 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1080 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1083 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1084 mode as a default when STRICT_ALIGNMENT, but not if not. */
1085 #define MEM_ALIGN(RTX) \
1086 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1087 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1088 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1090 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1091 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1092 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1093 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1094 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1095 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1096 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1097 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1099 /* 1 if RTX is a label_ref to a label outside the loop containing the
1101 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1102 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1104 /* 1 if RTX is a label_ref for a nonlocal label. */
1105 /* Likewise in an expr_list for a reg_label note. */
1106 #define LABEL_REF_NONLOCAL_P(RTX) \
1107 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1108 REG_LABEL)->volatil)
1110 /* 1 if RTX is a code_label that should always be considered to be needed. */
1111 #define LABEL_PRESERVE_P(RTX) \
1112 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1114 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1115 #define REG_LOOP_TEST_P(RTX) \
1116 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1118 /* During sched, 1 if RTX is an insn that must be scheduled together
1119 with the preceding insn. */
1120 #define SCHED_GROUP_P(RTX) \
1121 (RTL_FLAG_CHECK6("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN, \
1122 CODE_LABEL, BARRIER, NOTE)->in_struct)
1124 /* For a SET rtx, SET_DEST is the place that is set
1125 and SET_SRC is the value it is set to. */
1126 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1127 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1128 #define SET_IS_RETURN_P(RTX) \
1129 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1131 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1132 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1133 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1135 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1136 conditionally executing the code on, COND_EXEC_CODE is the code
1137 to execute if the condition is true. */
1138 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1139 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1141 /* 1 if RTX is a symbol_ref that addresses this function's constants pool. */
1142 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1143 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1145 /* 1 if RTX is a symbol_ref that addresses this function's string constant
1147 #define STRING_POOL_ADDRESS_P(RTX) \
1148 (RTL_FLAG_CHECK1("STRING_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->frame_related)
1150 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1151 #define SYMBOL_REF_FLAG(RTX) \
1152 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1154 /* 1 if RTX is a symbol_ref that has been the library function in
1155 emit_library_call. */
1156 #define SYMBOL_REF_USED(RTX) \
1157 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1159 /* 1 if RTX is a symbol_ref for a weak symbol. */
1160 #define SYMBOL_REF_WEAK(RTX) \
1161 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated)
1163 /* Define a macro to look for REG_INC notes,
1164 but save time on machines where they never exist. */
1166 /* Don't continue this line--convex cc version 4.1 would lose. */
1167 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1168 #define FIND_REG_INC_NOTE(INSN, REG) \
1169 ((REG) != NULL_RTX && REG_P ((REG)) \
1170 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1171 : find_reg_note ((INSN), REG_INC, (REG)))
1173 #define FIND_REG_INC_NOTE(INSN, REG) 0
1176 /* Indicate whether the machine has any sort of auto increment addressing.
1177 If not, we can avoid checking for REG_INC notes. */
1179 /* Don't continue this line--convex cc version 4.1 would lose. */
1180 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1181 #define AUTO_INC_DEC
1184 #ifndef HAVE_PRE_INCREMENT
1185 #define HAVE_PRE_INCREMENT 0
1188 #ifndef HAVE_PRE_DECREMENT
1189 #define HAVE_PRE_DECREMENT 0
1192 #ifndef HAVE_POST_INCREMENT
1193 #define HAVE_POST_INCREMENT 0
1196 #ifndef HAVE_POST_DECREMENT
1197 #define HAVE_POST_DECREMENT 0
1200 #ifndef HAVE_POST_MODIFY_DISP
1201 #define HAVE_POST_MODIFY_DISP 0
1204 #ifndef HAVE_POST_MODIFY_REG
1205 #define HAVE_POST_MODIFY_REG 0
1208 #ifndef HAVE_PRE_MODIFY_DISP
1209 #define HAVE_PRE_MODIFY_DISP 0
1212 #ifndef HAVE_PRE_MODIFY_REG
1213 #define HAVE_PRE_MODIFY_REG 0
1217 /* Some architectures do not have complete pre/post increment/decrement
1218 instruction sets, or only move some modes efficiently. These macros
1219 allow us to tune autoincrement generation. */
1221 #ifndef USE_LOAD_POST_INCREMENT
1222 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1225 #ifndef USE_LOAD_POST_DECREMENT
1226 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1229 #ifndef USE_LOAD_PRE_INCREMENT
1230 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1233 #ifndef USE_LOAD_PRE_DECREMENT
1234 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1237 #ifndef USE_STORE_POST_INCREMENT
1238 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1241 #ifndef USE_STORE_POST_DECREMENT
1242 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1245 #ifndef USE_STORE_PRE_INCREMENT
1246 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1249 #ifndef USE_STORE_PRE_DECREMENT
1250 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1253 /* Determine if the insn is a PHI node. */
1254 #define PHI_NODE_P(X) \
1255 ((X) && GET_CODE (X) == INSN \
1256 && GET_CODE (PATTERN (X)) == SET \
1257 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1259 /* Nonzero if we need to distinguish between the return value of this function
1260 and the return value of a function called by this function. This helps
1262 This is 1 until after the rtl generation pass. */
1263 extern int rtx_equal_function_value_matters
;
1265 /* Nonzero when we are generating CONCATs. */
1266 extern int generating_concat_p
;
1268 /* Generally useful functions. */
1271 extern int ceil_log2
PARAMS ((unsigned HOST_WIDE_INT
));
1273 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1276 extern rtx expand_builtin_expect_jump
PARAMS ((tree
, rtx
, rtx
));
1279 extern void set_stack_check_libfunc
PARAMS ((rtx
));
1280 extern HOST_WIDE_INT trunc_int_for_mode
PARAMS ((HOST_WIDE_INT
,
1281 enum machine_mode
));
1282 extern rtx plus_constant_wide
PARAMS ((rtx
, HOST_WIDE_INT
));
1283 extern rtx plus_constant_for_output_wide
PARAMS ((rtx
, HOST_WIDE_INT
));
1284 extern void optimize_save_area_alloca
PARAMS ((rtx
));
1287 extern rtx gen_rtx
PARAMS ((enum rtx_code
,
1288 enum machine_mode
, ...));
1289 extern rtvec gen_rtvec
PARAMS ((int, ...));
1290 extern rtx copy_insn_1
PARAMS ((rtx
));
1291 extern rtx copy_insn
PARAMS ((rtx
));
1292 extern rtx gen_int_mode
PARAMS ((HOST_WIDE_INT
,
1293 enum machine_mode
));
1294 extern rtx emit_copy_of_insn_after
PARAMS ((rtx
, rtx
));
1297 extern rtx rtx_alloc
PARAMS ((RTX_CODE
));
1298 extern rtvec rtvec_alloc
PARAMS ((int));
1299 extern rtx copy_rtx
PARAMS ((rtx
));
1302 extern rtx copy_rtx_if_shared
PARAMS ((rtx
));
1305 extern rtx copy_most_rtx
PARAMS ((rtx
, rtx
));
1306 extern rtx shallow_copy_rtx
PARAMS ((rtx
));
1307 extern int rtx_equal_p
PARAMS ((rtx
, rtx
));
1310 extern rtvec gen_rtvec_v
PARAMS ((int, rtx
*));
1311 extern rtx gen_reg_rtx
PARAMS ((enum machine_mode
));
1312 extern rtx gen_label_rtx
PARAMS ((void));
1313 extern int subreg_hard_regno
PARAMS ((rtx
, int));
1314 extern rtx gen_lowpart_common
PARAMS ((enum machine_mode
, rtx
));
1315 extern rtx gen_lowpart
PARAMS ((enum machine_mode
, rtx
));
1318 extern rtx gen_lowpart_if_possible
PARAMS ((enum machine_mode
, rtx
));
1321 extern rtx gen_highpart
PARAMS ((enum machine_mode
, rtx
));
1322 extern rtx gen_highpart_mode
PARAMS ((enum machine_mode
,
1323 enum machine_mode
, rtx
));
1324 extern rtx gen_realpart
PARAMS ((enum machine_mode
, rtx
));
1325 extern rtx gen_imagpart
PARAMS ((enum machine_mode
, rtx
));
1326 extern rtx operand_subword
PARAMS ((rtx
, unsigned int, int,
1327 enum machine_mode
));
1328 extern rtx constant_subword
PARAMS ((rtx
, int,
1329 enum machine_mode
));
1332 extern rtx operand_subword_force
PARAMS ((rtx
, unsigned int,
1333 enum machine_mode
));
1334 extern int subreg_lowpart_p
PARAMS ((rtx
));
1335 extern unsigned int subreg_lowpart_offset
PARAMS ((enum machine_mode
,
1336 enum machine_mode
));
1337 extern unsigned int subreg_highpart_offset
PARAMS ((enum machine_mode
,
1338 enum machine_mode
));
1339 extern rtx make_safe_from
PARAMS ((rtx
, rtx
));
1340 extern rtx convert_memory_address
PARAMS ((enum machine_mode
, rtx
));
1341 extern rtx get_insns
PARAMS ((void));
1342 extern const char *get_insn_name
PARAMS ((int));
1343 extern rtx get_last_insn
PARAMS ((void));
1344 extern rtx get_last_insn_anywhere
PARAMS ((void));
1345 extern rtx get_first_nonnote_insn
PARAMS ((void));
1346 extern rtx get_last_nonnote_insn
PARAMS ((void));
1347 extern void start_sequence
PARAMS ((void));
1348 extern void push_to_sequence
PARAMS ((rtx
));
1349 extern void end_sequence
PARAMS ((void));
1350 extern void push_to_full_sequence
PARAMS ((rtx
, rtx
));
1351 extern void end_full_sequence
PARAMS ((rtx
*, rtx
*));
1352 extern rtx gen_sequence
PARAMS ((void));
1355 extern rtx immed_double_const
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
, enum machine_mode
));
1356 extern rtx mem_for_const_double
PARAMS ((rtx
));
1357 extern rtx force_const_mem
PARAMS ((enum machine_mode
, rtx
));
1360 extern rtx get_pool_constant
PARAMS ((rtx
));
1361 extern rtx get_pool_constant_mark
PARAMS ((rtx
, bool *));
1362 extern enum machine_mode get_pool_mode
PARAMS ((rtx
));
1363 extern rtx get_pool_constant_for_function
PARAMS ((struct function
*, rtx
));
1364 extern enum machine_mode get_pool_mode_for_function
PARAMS ((struct function
*, rtx
));
1365 extern int get_pool_offset
PARAMS ((rtx
));
1366 extern rtx simplify_subtraction
PARAMS ((rtx
));
1369 extern rtx assign_stack_local
PARAMS ((enum machine_mode
,
1370 HOST_WIDE_INT
, int));
1371 extern rtx assign_stack_temp
PARAMS ((enum machine_mode
,
1372 HOST_WIDE_INT
, int));
1373 extern rtx assign_stack_temp_for_type
PARAMS ((enum machine_mode
,
1374 HOST_WIDE_INT
, int, tree
));
1375 extern rtx assign_temp
PARAMS ((tree
, int, int, int));
1377 extern rtx emit_insn_before
PARAMS ((rtx
, rtx
));
1378 extern rtx emit_insn_before_scope
PARAMS ((rtx
, rtx
, tree
));
1379 extern rtx emit_jump_insn_before
PARAMS ((rtx
, rtx
));
1380 extern rtx emit_jump_insn_before_scope
PARAMS ((rtx
, rtx
, tree
));
1381 extern rtx emit_call_insn_before
PARAMS ((rtx
, rtx
));
1382 extern rtx emit_call_insn_before_scope
PARAMS ((rtx
, rtx
, tree
));
1383 extern rtx emit_barrier_before
PARAMS ((rtx
));
1384 extern rtx emit_label_before
PARAMS ((rtx
, rtx
));
1385 extern rtx emit_note_before
PARAMS ((int, rtx
));
1386 extern rtx emit_insn_after
PARAMS ((rtx
, rtx
));
1387 extern rtx emit_insn_after_scope
PARAMS ((rtx
, rtx
, tree
));
1388 extern rtx emit_jump_insn_after
PARAMS ((rtx
, rtx
));
1389 extern rtx emit_jump_insn_after_scope
PARAMS ((rtx
, rtx
, tree
));
1390 extern rtx emit_call_insn_after
PARAMS ((rtx
, rtx
));
1391 extern rtx emit_call_insn_after_scope
PARAMS ((rtx
, rtx
, tree
));
1392 extern rtx emit_barrier_after
PARAMS ((rtx
));
1393 extern rtx emit_label_after
PARAMS ((rtx
, rtx
));
1394 extern rtx emit_note_after
PARAMS ((int, rtx
));
1395 extern rtx emit_line_note_after
PARAMS ((const char *, int, rtx
));
1396 extern rtx emit_insn
PARAMS ((rtx
));
1397 extern rtx emit_insns
PARAMS ((rtx
));
1398 extern rtx emit_insns_before
PARAMS ((rtx
, rtx
));
1399 extern rtx emit_insns_before_scope
PARAMS ((rtx
, rtx
, tree
));
1400 extern rtx emit_insns_after
PARAMS ((rtx
, rtx
));
1401 extern rtx emit_insns_after_scope
PARAMS ((rtx
, rtx
, tree
));
1402 extern rtx emit_jump_insn
PARAMS ((rtx
));
1403 extern rtx emit_call_insn
PARAMS ((rtx
));
1404 extern rtx emit_label
PARAMS ((rtx
));
1405 extern rtx emit_barrier
PARAMS ((void));
1406 extern rtx emit_line_note
PARAMS ((const char *, int));
1407 extern rtx emit_note
PARAMS ((const char *, int));
1408 extern rtx emit_line_note_force
PARAMS ((const char *, int));
1409 extern rtx make_insn_raw
PARAMS ((rtx
));
1410 extern rtx previous_insn
PARAMS ((rtx
));
1411 extern rtx next_insn
PARAMS ((rtx
));
1412 extern rtx prev_nonnote_insn
PARAMS ((rtx
));
1413 extern rtx next_nonnote_insn
PARAMS ((rtx
));
1414 extern rtx prev_real_insn
PARAMS ((rtx
));
1415 extern rtx next_real_insn
PARAMS ((rtx
));
1416 extern rtx prev_active_insn
PARAMS ((rtx
));
1417 extern rtx next_active_insn
PARAMS ((rtx
));
1418 extern int active_insn_p
PARAMS ((rtx
));
1419 extern rtx prev_label
PARAMS ((rtx
));
1420 extern rtx next_label
PARAMS ((rtx
));
1421 extern rtx next_cc0_user
PARAMS ((rtx
));
1422 extern rtx prev_cc0_setter
PARAMS ((rtx
));
1425 extern rtx next_nondeleted_insn
PARAMS ((rtx
));
1426 extern enum rtx_code reverse_condition
PARAMS ((enum rtx_code
));
1427 extern enum rtx_code reverse_condition_maybe_unordered
PARAMS ((enum rtx_code
));
1428 extern enum rtx_code swap_condition
PARAMS ((enum rtx_code
));
1429 extern enum rtx_code unsigned_condition
PARAMS ((enum rtx_code
));
1430 extern enum rtx_code signed_condition
PARAMS ((enum rtx_code
));
1431 extern void mark_jump_label
PARAMS ((rtx
, rtx
, int));
1432 extern void cleanup_barriers
PARAMS ((void));
1435 extern bool squeeze_notes
PARAMS ((rtx
*, rtx
*));
1436 extern rtx delete_related_insns
PARAMS ((rtx
));
1437 extern void delete_jump
PARAMS ((rtx
));
1438 extern void delete_barrier
PARAMS ((rtx
));
1439 extern rtx get_label_before
PARAMS ((rtx
));
1440 extern rtx get_label_after
PARAMS ((rtx
));
1441 extern rtx follow_jumps
PARAMS ((rtx
));
1444 extern rtx
*find_constant_term_loc
PARAMS ((rtx
*));
1447 extern rtx try_split
PARAMS ((rtx
, rtx
, int));
1448 extern int split_branch_probability
;
1450 /* In unknown file */
1451 extern rtx split_insns
PARAMS ((rtx
, rtx
));
1453 /* In simplify-rtx.c */
1454 extern rtx simplify_unary_operation
PARAMS ((enum rtx_code
,
1455 enum machine_mode
, rtx
,
1456 enum machine_mode
));
1457 extern rtx simplify_binary_operation
PARAMS ((enum rtx_code
,
1458 enum machine_mode
, rtx
,
1460 extern rtx simplify_ternary_operation
PARAMS ((enum rtx_code
,
1462 enum machine_mode
, rtx
, rtx
,
1464 extern rtx simplify_relational_operation
PARAMS ((enum rtx_code
,
1465 enum machine_mode
, rtx
,
1467 extern rtx simplify_gen_binary
PARAMS ((enum rtx_code
,
1470 extern rtx simplify_gen_unary
PARAMS ((enum rtx_code
,
1471 enum machine_mode
, rtx
,
1472 enum machine_mode
));
1473 extern rtx simplify_gen_ternary
PARAMS ((enum rtx_code
,
1477 extern rtx simplify_gen_relational
PARAMS ((enum rtx_code
,
1481 extern rtx simplify_subreg
PARAMS ((enum machine_mode
,
1485 extern rtx simplify_gen_subreg
PARAMS ((enum machine_mode
,
1489 extern rtx simplify_replace_rtx
PARAMS ((rtx
, rtx
, rtx
));
1490 extern rtx simplify_rtx
PARAMS ((rtx
));
1491 extern rtx avoid_constant_pool_reference
PARAMS ((rtx
));
1494 extern rtx gen_mem_addressof
PARAMS ((rtx
, tree
));
1497 extern enum machine_mode choose_hard_reg_mode
PARAMS ((unsigned int,
1501 extern rtx set_unique_reg_note
PARAMS ((rtx
, enum reg_note
, rtx
));
1503 /* Functions in rtlanal.c */
1505 /* Single set is implemented as macro for performance reasons. */
1506 #define single_set(I) (INSN_P (I) \
1507 ? (GET_CODE (PATTERN (I)) == SET \
1508 ? PATTERN (I) : single_set_1 (I)) \
1510 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1512 extern int rtx_addr_can_trap_p
PARAMS ((rtx
));
1513 extern int rtx_unstable_p
PARAMS ((rtx
));
1514 extern int rtx_varies_p
PARAMS ((rtx
, int));
1515 extern int rtx_addr_varies_p
PARAMS ((rtx
, int));
1516 extern HOST_WIDE_INT get_integer_term
PARAMS ((rtx
));
1517 extern rtx get_related_value
PARAMS ((rtx
));
1518 extern rtx get_jump_table_offset
PARAMS ((rtx
, rtx
*));
1519 extern int global_reg_mentioned_p
PARAMS ((rtx
));
1520 extern int reg_mentioned_p
PARAMS ((rtx
, rtx
));
1521 extern int count_occurrences
PARAMS ((rtx
, rtx
, int));
1522 extern int reg_referenced_p
PARAMS ((rtx
, rtx
));
1523 extern int reg_used_between_p
PARAMS ((rtx
, rtx
, rtx
));
1524 extern int reg_referenced_between_p
PARAMS ((rtx
, rtx
, rtx
));
1525 extern int reg_set_between_p
PARAMS ((rtx
, rtx
, rtx
));
1526 extern int regs_set_between_p
PARAMS ((rtx
, rtx
, rtx
));
1527 extern int commutative_operand_precedence
PARAMS ((rtx
));
1528 extern int swap_commutative_operands_p
PARAMS ((rtx
, rtx
));
1529 extern int modified_between_p
PARAMS ((rtx
, rtx
, rtx
));
1530 extern int no_labels_between_p
PARAMS ((rtx
, rtx
));
1531 extern int no_jumps_between_p
PARAMS ((rtx
, rtx
));
1532 extern int modified_in_p
PARAMS ((rtx
, rtx
));
1533 extern int insn_dependent_p
PARAMS ((rtx
, rtx
));
1534 extern int reg_set_p
PARAMS ((rtx
, rtx
));
1535 extern rtx single_set_2
PARAMS ((rtx
, rtx
));
1536 extern int multiple_sets
PARAMS ((rtx
));
1537 extern int set_noop_p
PARAMS ((rtx
));
1538 extern int noop_move_p
PARAMS ((rtx
));
1539 extern rtx find_last_value
PARAMS ((rtx
, rtx
*, rtx
, int));
1540 extern int refers_to_regno_p
PARAMS ((unsigned int, unsigned int,
1542 extern int reg_overlap_mentioned_p
PARAMS ((rtx
, rtx
));
1543 extern rtx set_of
PARAMS ((rtx
, rtx
));
1544 extern void note_stores
PARAMS ((rtx
,
1545 void (*) (rtx
, rtx
, void *),
1547 extern void note_uses
PARAMS ((rtx
*,
1548 void (*) (rtx
*, void *),
1550 extern rtx reg_set_last
PARAMS ((rtx
, rtx
));
1551 extern int dead_or_set_p
PARAMS ((rtx
, rtx
));
1552 extern int dead_or_set_regno_p
PARAMS ((rtx
, unsigned int));
1553 extern rtx find_reg_note
PARAMS ((rtx
, enum reg_note
, rtx
));
1554 extern rtx find_regno_note
PARAMS ((rtx
, enum reg_note
,
1556 extern rtx find_reg_equal_equiv_note
PARAMS ((rtx
));
1557 extern int find_reg_fusage
PARAMS ((rtx
, enum rtx_code
, rtx
));
1558 extern int find_regno_fusage
PARAMS ((rtx
, enum rtx_code
,
1560 extern int pure_call_p
PARAMS ((rtx
));
1561 extern void remove_note
PARAMS ((rtx
, rtx
));
1562 extern int side_effects_p
PARAMS ((rtx
));
1563 extern int volatile_refs_p
PARAMS ((rtx
));
1564 extern int volatile_insn_p
PARAMS ((rtx
));
1565 extern int may_trap_p
PARAMS ((rtx
));
1566 extern int inequality_comparisons_p
PARAMS ((rtx
));
1567 extern rtx replace_rtx
PARAMS ((rtx
, rtx
, rtx
));
1568 extern rtx replace_regs
PARAMS ((rtx
, rtx
*, unsigned int,
1570 extern int computed_jump_p
PARAMS ((rtx
));
1571 typedef int (*rtx_function
) PARAMS ((rtx
*, void *));
1572 extern int for_each_rtx
PARAMS ((rtx
*, rtx_function
, void *));
1573 extern rtx regno_use_in
PARAMS ((unsigned int, rtx
));
1574 extern int auto_inc_p
PARAMS ((rtx
));
1575 extern int in_expr_list_p
PARAMS ((rtx
, rtx
));
1576 extern void remove_node_from_expr_list
PARAMS ((rtx
, rtx
*));
1577 extern int insns_safe_to_move_p
PARAMS ((rtx
, rtx
, rtx
*));
1578 extern int loc_mentioned_in_p
PARAMS ((rtx
*, rtx
));
1579 extern rtx find_first_parameter_load
PARAMS ((rtx
, rtx
));
1580 extern bool keep_with_call_p
PARAMS ((rtx
));
1584 extern rtx find_use_as_address
PARAMS ((rtx
, rtx
, HOST_WIDE_INT
));
1588 void free_EXPR_LIST_list
PARAMS ((rtx
*));
1589 void free_INSN_LIST_list
PARAMS ((rtx
*));
1590 void free_EXPR_LIST_node
PARAMS ((rtx
));
1591 void free_INSN_LIST_node
PARAMS ((rtx
));
1592 rtx alloc_INSN_LIST
PARAMS ((rtx
, rtx
));
1593 rtx alloc_EXPR_LIST
PARAMS ((int, rtx
, rtx
));
1597 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1598 Always at least 3, since the combiner could put that many togetherm
1599 and we want this to remain correct for all the remaining passes. */
1601 extern int max_parallel
;
1603 /* Free up register info memory. */
1604 extern void free_reg_info
PARAMS ((void));
1607 extern int asm_noperands
PARAMS ((rtx
));
1608 extern const char *decode_asm_operands
PARAMS ((rtx
, rtx
*, rtx
**,
1610 enum machine_mode
*));
1612 extern enum reg_class reg_preferred_class
PARAMS ((int));
1613 extern enum reg_class reg_alternate_class
PARAMS ((int));
1615 extern rtx get_first_nonparm_insn
PARAMS ((void));
1617 extern void split_all_insns
PARAMS ((int));
1618 extern void split_all_insns_noflow
PARAMS ((void));
1620 #define MAX_SAVED_CONST_INT 64
1621 extern GTY(()) rtx const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1623 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1624 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1625 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1626 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1627 extern GTY(()) rtx const_true_rtx
;
1629 extern GTY(()) rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1631 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1632 same as VOIDmode. */
1634 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1636 /* Likewise, for the constants 1 and 2. */
1638 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1639 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1641 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1642 is used to represent the frame pointer. This is because the
1643 hard frame pointer and the automatic variables are separated by an amount
1644 that cannot be determined until after register allocation. We can assume
1645 that in this case ELIMINABLE_REGS will be defined, one action of which
1646 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1647 #ifndef HARD_FRAME_POINTER_REGNUM
1648 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1651 /* Index labels for global_rtl. */
1652 enum global_rtl_index
1658 /* For register elimination to work properly these hard_frame_pointer_rtx,
1659 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1660 the same register. */
1661 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1662 GR_ARG_POINTER
= GR_FRAME_POINTER
,
1664 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1665 GR_HARD_FRAME_POINTER
= GR_FRAME_POINTER
,
1667 GR_HARD_FRAME_POINTER
,
1669 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1670 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1671 GR_ARG_POINTER
= GR_HARD_FRAME_POINTER
,
1676 GR_VIRTUAL_INCOMING_ARGS
,
1677 GR_VIRTUAL_STACK_ARGS
,
1678 GR_VIRTUAL_STACK_DYNAMIC
,
1679 GR_VIRTUAL_OUTGOING_ARGS
,
1685 /* Pointers to standard pieces of rtx are stored here. */
1686 extern GTY(()) rtx global_rtl
[GR_MAX
];
1688 /* Standard pieces of rtx, to be substituted directly into things. */
1689 #define pc_rtx (global_rtl[GR_PC])
1690 #define cc0_rtx (global_rtl[GR_CC0])
1692 /* All references to certain hard regs, except those created
1693 by allocating pseudo regs into them (when that's possible),
1694 go through these unique rtx objects. */
1695 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1696 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1697 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1698 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1700 extern GTY(()) rtx pic_offset_table_rtx
;
1701 extern GTY(()) rtx struct_value_rtx
;
1702 extern GTY(()) rtx struct_value_incoming_rtx
;
1703 extern GTY(()) rtx static_chain_rtx
;
1704 extern GTY(()) rtx static_chain_incoming_rtx
;
1705 extern GTY(()) rtx return_address_pointer_rtx
;
1707 /* Include the RTL generation functions. */
1713 /* There are some RTL codes that require special attention; the
1714 generation functions included above do the raw handling. If you
1715 add to this list, modify special_rtx in gengenrtl.c as well. You
1716 should also modify gen_rtx to use the special function. */
1718 extern rtx gen_rtx_CONST_INT
PARAMS ((enum machine_mode
, HOST_WIDE_INT
));
1719 extern rtx gen_raw_REG
PARAMS ((enum machine_mode
, int));
1720 extern rtx gen_rtx_REG
PARAMS ((enum machine_mode
, unsigned));
1721 extern rtx gen_rtx_SUBREG
PARAMS ((enum machine_mode
, rtx
, int));
1722 extern rtx gen_rtx_MEM
PARAMS ((enum machine_mode
, rtx
));
1724 extern rtx gen_lowpart_SUBREG
PARAMS ((enum machine_mode
, rtx
));
1726 /* We need the cast here to ensure that we get the same result both with
1727 and without prototypes. */
1728 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1730 /* Virtual registers are used during RTL generation to refer to locations into
1731 the stack frame when the actual location isn't known until RTL generation
1732 is complete. The routine instantiate_virtual_regs replaces these with
1733 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1736 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1738 /* This points to the first word of the incoming arguments passed on the stack,
1739 either by the caller or by the callee when pretending it was passed by the
1742 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1744 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1746 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1747 variable on the stack. Otherwise, it points to the first variable on
1750 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1752 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1754 /* This points to the location of dynamically-allocated memory on the stack
1755 immediately after the stack pointer has been adjusted by the amount
1758 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1760 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1762 /* This points to the location in the stack at which outgoing arguments should
1763 be written when the stack is pre-pushed (arguments pushed using push
1764 insns always use sp). */
1766 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1768 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1770 /* This points to the Canonical Frame Address of the function. This
1771 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1772 but is calculated relative to the arg pointer for simplicity; the
1773 frame pointer nor stack pointer are necessarily fixed relative to
1774 the CFA until after reload. */
1776 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1778 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1780 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1782 /* Nonzero if REGNUM is a pointer into the stack frame. */
1783 #define REGNO_PTR_FRAME_P(REGNUM) \
1784 ((REGNUM) == STACK_POINTER_REGNUM \
1785 || (REGNUM) == FRAME_POINTER_REGNUM \
1786 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1787 || (REGNUM) == ARG_POINTER_REGNUM \
1788 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1789 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1791 /* REGNUM never really appearing in the INSN stream. */
1792 #define INVALID_REGNUM (~(unsigned int) 0)
1794 extern rtx find_next_ref
PARAMS ((rtx
, rtx
));
1796 extern rtx output_constant_def
PARAMS ((tree
, int));
1798 /* Define a default value for STORE_FLAG_VALUE. */
1800 #ifndef STORE_FLAG_VALUE
1801 #define STORE_FLAG_VALUE 1
1804 /* Nonzero after the second flow pass has completed.
1805 Set to 1 or 0 by toplev.c */
1806 extern int flow2_completed
;
1808 /* Nonzero after end of reload pass.
1809 Set to 1 or 0 by reload1.c. */
1811 extern int reload_completed
;
1813 /* Set to 1 while reload_as_needed is operating.
1814 Required by some machines to handle any generated moves differently. */
1816 extern int reload_in_progress
;
1818 /* If this is nonzero, we do not bother generating VOLATILE
1819 around volatile memory references, and we are willing to
1820 output indirect addresses. If cse is to follow, we reject
1821 indirect addresses so a useful potential cse is generated;
1822 if it is used only once, instruction combination will produce
1823 the same indirect address eventually. */
1824 extern int cse_not_expected
;
1826 /* Set to nonzero before life analysis to indicate that it is unsafe to
1827 generate any new pseudo registers. */
1828 extern int no_new_pseudos
;
1830 /* Translates rtx code to tree code, for those codes needed by
1831 REAL_ARITHMETIC. The function returns an int because the caller may not
1832 know what `enum tree_code' means. */
1834 extern int rtx_to_tree_code
PARAMS ((enum rtx_code
));
1838 extern void gcc_obstack_init
PARAMS ((struct obstack
*));
1841 struct cse_basic_block_data
;
1843 /* Return the right cost to give to an operation
1844 to make the cost of the corresponding register-to-register instruction
1845 N times that of a fast register-to-register instruction. */
1846 #define COSTS_N_INSNS(N) ((N) * 4)
1848 /* Maximum cost of a rtl expression. This value has the special meaning
1849 not to use an rtx with this cost under any circumstances. */
1850 #define MAX_COST INT_MAX
1852 extern int rtx_cost
PARAMS ((rtx
, enum rtx_code
));
1853 extern int address_cost
PARAMS ((rtx
, enum machine_mode
));
1854 extern int delete_trivially_dead_insns
PARAMS ((rtx
, int));
1856 extern int cse_main
PARAMS ((rtx
, int, int, FILE *));
1858 extern void cse_end_of_basic_block
PARAMS ((rtx
,
1859 struct cse_basic_block_data
*,
1863 extern int comparison_dominates_p
PARAMS ((enum rtx_code
, enum rtx_code
));
1864 extern int condjump_p
PARAMS ((rtx
));
1865 extern int any_condjump_p
PARAMS ((rtx
));
1866 extern int any_uncondjump_p
PARAMS ((rtx
));
1867 extern int safe_to_remove_jump_p
PARAMS ((rtx
));
1868 extern rtx pc_set
PARAMS ((rtx
));
1869 extern rtx condjump_label
PARAMS ((rtx
));
1870 extern int simplejump_p
PARAMS ((rtx
));
1871 extern int returnjump_p
PARAMS ((rtx
));
1872 extern int onlyjump_p
PARAMS ((rtx
));
1873 extern int only_sets_cc0_p
PARAMS ((rtx
));
1874 extern int sets_cc0_p
PARAMS ((rtx
));
1875 extern int invert_jump_1
PARAMS ((rtx
, rtx
));
1876 extern int invert_jump
PARAMS ((rtx
, rtx
, int));
1877 extern int rtx_renumbered_equal_p
PARAMS ((rtx
, rtx
));
1878 extern int true_regnum
PARAMS ((rtx
));
1879 extern int redirect_jump_1
PARAMS ((rtx
, rtx
));
1880 extern int redirect_jump
PARAMS ((rtx
, rtx
, int));
1881 extern void rebuild_jump_labels
PARAMS ((rtx
));
1882 extern enum rtx_code reversed_comparison_code
PARAMS ((rtx
, rtx
));
1883 extern enum rtx_code reversed_comparison_code_parts
PARAMS ((enum rtx_code
,
1885 extern void delete_for_peephole
PARAMS ((rtx
, rtx
));
1886 extern int condjump_in_parallel_p
PARAMS ((rtx
));
1887 extern void never_reached_warning
PARAMS ((rtx
, rtx
));
1888 extern void purge_line_number_notes
PARAMS ((rtx
));
1889 extern void copy_loop_headers
PARAMS ((rtx
));
1891 /* In emit-rtl.c. */
1892 extern int max_reg_num
PARAMS ((void));
1893 extern int max_label_num
PARAMS ((void));
1894 extern int get_first_label_num
PARAMS ((void));
1895 extern void delete_insns_since
PARAMS ((rtx
));
1896 extern void mark_reg_pointer
PARAMS ((rtx
, int));
1897 extern void mark_user_reg
PARAMS ((rtx
));
1898 extern void reset_used_flags
PARAMS ((rtx
));
1899 extern void reorder_insns
PARAMS ((rtx
, rtx
, rtx
));
1900 extern void reorder_insns_nobb
PARAMS ((rtx
, rtx
, rtx
));
1901 extern int get_max_uid
PARAMS ((void));
1902 extern int in_sequence_p
PARAMS ((void));
1903 extern void force_next_line_note
PARAMS ((void));
1904 extern void init_emit
PARAMS ((void));
1905 extern void init_emit_once
PARAMS ((int));
1906 extern void push_topmost_sequence
PARAMS ((void));
1907 extern void pop_topmost_sequence
PARAMS ((void));
1908 extern int subreg_realpart_p
PARAMS ((rtx
));
1909 extern void reverse_comparison
PARAMS ((rtx
));
1910 extern void set_new_first_and_last_insn
PARAMS ((rtx
, rtx
));
1911 extern void set_new_first_and_last_label_num
PARAMS ((int, int));
1912 extern void set_new_last_label_num
PARAMS ((int));
1913 extern void unshare_all_rtl_again
PARAMS ((rtx
));
1914 extern void set_first_insn
PARAMS ((rtx
));
1915 extern void set_last_insn
PARAMS ((rtx
));
1916 extern void link_cc0_insns
PARAMS ((rtx
));
1917 extern void add_insn
PARAMS ((rtx
));
1918 extern void add_insn_before
PARAMS ((rtx
, rtx
));
1919 extern void add_insn_after
PARAMS ((rtx
, rtx
));
1920 extern void remove_insn
PARAMS ((rtx
));
1921 extern void reorder_insns_with_line_notes
PARAMS ((rtx
, rtx
, rtx
));
1922 extern void emit_insn_after_with_line_notes
PARAMS ((rtx
, rtx
, rtx
));
1923 extern enum rtx_code classify_insn
PARAMS ((rtx
));
1924 extern rtx emit
PARAMS ((rtx
));
1925 /* Query and clear/ restore no_line_numbers. This is used by the
1926 switch / case handling in stmt.c to give proper line numbers in
1927 warnings about unreachable code. */
1928 int force_line_numbers
PARAMS ((void));
1929 void restore_line_number_status
PARAMS ((int old_value
));
1930 extern void renumber_insns
PARAMS ((FILE *));
1931 extern void remove_unnecessary_notes
PARAMS ((void));
1932 extern rtx delete_insn
PARAMS ((rtx
));
1933 extern void delete_insn_chain
PARAMS ((rtx
, rtx
));
1934 extern rtx delete_insn_and_edges
PARAMS ((rtx
));
1935 extern void delete_insn_chain_and_edges
PARAMS ((rtx
, rtx
));
1938 extern int combine_instructions
PARAMS ((rtx
, unsigned int));
1939 extern unsigned int extended_count
PARAMS ((rtx
, enum machine_mode
, int));
1940 extern rtx remove_death
PARAMS ((unsigned int, rtx
));
1942 extern void dump_combine_stats
PARAMS ((FILE *));
1943 extern void dump_combine_total_stats
PARAMS ((FILE *));
1948 extern void schedule_insns
PARAMS ((FILE *));
1949 extern void schedule_ebbs
PARAMS ((FILE *));
1951 extern void fix_sched_param
PARAMS ((const char *, const char *));
1953 /* In print-rtl.c */
1954 extern const char *print_rtx_head
;
1955 extern void debug_rtx
PARAMS ((rtx
));
1956 extern void debug_rtx_list
PARAMS ((rtx
, int));
1957 extern void debug_rtx_range
PARAMS ((rtx
, rtx
));
1958 extern rtx debug_rtx_find
PARAMS ((rtx
, int));
1960 extern void print_mem_expr
PARAMS ((FILE *, tree
));
1961 extern void print_rtl
PARAMS ((FILE *, rtx
));
1962 extern void print_simple_rtl
PARAMS ((FILE *, rtx
));
1963 extern int print_rtl_single
PARAMS ((FILE *, rtx
));
1964 extern void print_inline_rtx
PARAMS ((FILE *, rtx
, int));
1968 extern void init_loop
PARAMS ((void));
1969 extern rtx libcall_other_reg
PARAMS ((rtx
, rtx
));
1971 extern void loop_optimize
PARAMS ((rtx
, FILE *, int));
1973 extern void record_excess_regs
PARAMS ((rtx
, rtx
, rtx
*));
1976 extern void reposition_prologue_and_epilogue_notes
PARAMS ((rtx
));
1977 extern void thread_prologue_and_epilogue_insns
PARAMS ((rtx
));
1978 extern int prologue_epilogue_contains
PARAMS ((rtx
));
1979 extern int sibcall_epilogue_contains
PARAMS ((rtx
));
1980 extern void preserve_rtl_expr_result
PARAMS ((rtx
));
1981 extern void mark_temp_addr_taken
PARAMS ((rtx
));
1982 extern void update_temp_slot_address
PARAMS ((rtx
, rtx
));
1983 extern void purge_addressof
PARAMS ((rtx
));
1984 extern void purge_hard_subreg_sets
PARAMS ((rtx
));
1987 extern void set_file_and_line_for_stmt
PARAMS ((const char *, int));
1988 extern void expand_null_return
PARAMS ((void));
1989 extern void emit_jump
PARAMS ((rtx
));
1990 extern int preserve_subexpressions_p
PARAMS ((void));
1993 extern void move_by_pieces
PARAMS ((rtx
, rtx
,
1994 unsigned HOST_WIDE_INT
,
1998 extern void recompute_reg_usage
PARAMS ((rtx
, int));
1999 extern int initialize_uninitialized_subregs
PARAMS ((void));
2000 extern void delete_dead_jumptables
PARAMS ((void));
2002 extern void print_rtl_with_bb
PARAMS ((FILE *, rtx
));
2003 extern void dump_flow_info
PARAMS ((FILE *));
2007 extern void init_expmed
PARAMS ((void));
2008 extern void expand_inc
PARAMS ((rtx
, rtx
));
2009 extern void expand_dec
PARAMS ((rtx
, rtx
));
2010 extern rtx expand_mult_highpart
PARAMS ((enum machine_mode
, rtx
,
2011 unsigned HOST_WIDE_INT
, rtx
,
2016 extern int gcse_main
PARAMS ((rtx
, FILE *));
2020 extern void mark_elimination
PARAMS ((int, int));
2022 extern int global_alloc
PARAMS ((FILE *));
2023 extern void dump_global_regs
PARAMS ((FILE *));
2026 extern void retry_global_alloc
PARAMS ((int, HARD_REG_SET
));
2028 extern void build_insn_chain
PARAMS ((rtx
));
2031 extern int reg_classes_intersect_p
PARAMS ((enum reg_class
, enum reg_class
));
2032 extern int reg_class_subset_p
PARAMS ((enum reg_class
, enum reg_class
));
2033 extern void globalize_reg
PARAMS ((int));
2034 extern void init_regs
PARAMS ((void));
2035 extern void init_reg_sets
PARAMS ((void));
2036 extern void regset_release_memory
PARAMS ((void));
2037 extern void regclass_init
PARAMS ((void));
2038 extern void regclass
PARAMS ((rtx
, int, FILE *));
2039 extern void reg_scan
PARAMS ((rtx
, unsigned int, int));
2040 extern void reg_scan_update
PARAMS ((rtx
, rtx
, unsigned int));
2041 extern void fix_register
PARAMS ((const char *, int, int));
2043 extern void delete_null_pointer_checks
PARAMS ((rtx
));
2047 extern void regmove_optimize
PARAMS ((rtx
, int, FILE *));
2049 extern void combine_stack_adjustments
PARAMS ((void));
2053 extern void dbr_schedule
PARAMS ((rtx
, FILE *));
2056 /* In local-alloc.c */
2058 extern void dump_local_alloc
PARAMS ((FILE *));
2060 extern int local_alloc
PARAMS ((void));
2061 extern int function_invariant_p
PARAMS ((rtx
));
2064 extern void init_branch_prob
PARAMS ((const char *));
2065 extern void branch_prob
PARAMS ((void));
2066 extern void end_branch_prob
PARAMS ((void));
2067 extern void output_func_start_profiler
PARAMS ((void));
2069 /* In reg-stack.c */
2071 extern void reg_to_stack
PARAMS ((rtx
, FILE *));
2074 /* In fold-const.c */
2075 extern int add_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2076 unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2077 unsigned HOST_WIDE_INT
*,
2079 extern int neg_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2080 unsigned HOST_WIDE_INT
*,
2082 extern int mul_double
PARAMS ((unsigned HOST_WIDE_INT
,
2084 unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2085 unsigned HOST_WIDE_INT
*,
2087 extern void lshift_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2088 HOST_WIDE_INT
, unsigned int,
2089 unsigned HOST_WIDE_INT
*,
2090 HOST_WIDE_INT
*, int));
2091 extern void rshift_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2092 HOST_WIDE_INT
, unsigned int,
2093 unsigned HOST_WIDE_INT
*,
2094 HOST_WIDE_INT
*, int));
2095 extern void lrotate_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2096 HOST_WIDE_INT
, unsigned int,
2097 unsigned HOST_WIDE_INT
*,
2099 extern void rrotate_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2100 HOST_WIDE_INT
, unsigned int,
2101 unsigned HOST_WIDE_INT
*,
2110 LCT_CONST_MAKE_BLOCK
= 3,
2111 LCT_PURE_MAKE_BLOCK
= 4,
2114 LCT_ALWAYS_RETURN
= 7,
2115 LCT_RETURNS_TWICE
= 8
2118 extern void emit_library_call
PARAMS ((rtx
, enum libcall_type
,
2119 enum machine_mode
, int,
2121 extern rtx emit_library_call_value
PARAMS ((rtx
, rtx
, enum libcall_type
,
2122 enum machine_mode
, int,
2126 extern int set_dominates_use
PARAMS ((int, int, int, rtx
, rtx
));
2129 extern int in_data_section
PARAMS ((void));
2130 extern void init_varasm_once
PARAMS ((void));
2133 extern void init_rtl
PARAMS ((void));
2134 extern void traverse_md_constants
PARAMS ((int (*) (void **, void *),
2136 struct md_constant
{ char *name
, *value
; };
2139 extern int read_skip_spaces
PARAMS ((FILE *));
2140 extern rtx read_rtx
PARAMS ((FILE *));
2143 extern const char *read_rtx_filename
;
2144 extern int read_rtx_lineno
;
2146 /* Redefine abort to report an internal error w/o coredump, and
2147 reporting the location of the error in the source file. This logic
2148 is duplicated in rtl.h and tree.h because every file that needs the
2149 special abort includes one or both. toplev.h gets too few files,
2150 system.h gets too many. */
2152 extern void fancy_abort
PARAMS ((const char *, int, const char *))
2154 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2157 extern void clear_reg_alias_info
PARAMS ((rtx
));
2158 extern rtx canon_rtx
PARAMS ((rtx
));
2159 extern int true_dependence
PARAMS ((rtx
, enum machine_mode
, rtx
,
2160 int (*)(rtx
, int)));
2161 extern rtx get_addr
PARAMS ((rtx
));
2162 extern int canon_true_dependence
PARAMS ((rtx
, enum machine_mode
, rtx
,
2163 rtx
, int (*)(rtx
, int)));
2164 extern int read_dependence
PARAMS ((rtx
, rtx
));
2165 extern int anti_dependence
PARAMS ((rtx
, rtx
));
2166 extern int output_dependence
PARAMS ((rtx
, rtx
));
2167 extern void mark_constant_function
PARAMS ((void));
2168 extern void init_alias_once
PARAMS ((void));
2169 extern void init_alias_analysis
PARAMS ((void));
2170 extern void end_alias_analysis
PARAMS ((void));
2171 extern rtx addr_side_effect_eval
PARAMS ((rtx
, int, int));
2175 sibcall_use_normal
= 1,
2176 sibcall_use_tail_recursion
,
2180 extern void optimize_sibling_and_tail_recursive_calls
PARAMS ((void));
2181 extern void replace_call_placeholder
PARAMS ((rtx
, sibcall_use_t
));
2184 extern int stack_regs_mentioned
PARAMS ((rtx insn
));
2188 extern GTY(()) rtx stack_limit_rtx
;
2190 /* In regrename.c */
2191 extern void regrename_optimize
PARAMS ((void));
2192 extern void copyprop_hardreg_forward
PARAMS ((void));
2195 extern void if_convert
PARAMS ((int));
2198 extern void invert_br_probabilities
PARAMS ((rtx
));
2199 extern bool expensive_function_p
PARAMS ((int));
2201 extern void tracer
PARAMS ((void));
2202 #endif /* ! GCC_RTL_H */