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, 2003 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 extern const unsigned char rtx_next
[NUM_RTX_CODE
];
68 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
69 relative to which the offsets are calculated, as explained in rtl.def. */
72 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
73 unsigned min_align
: 8;
75 unsigned base_after_vec
: 1; /* BASE is after the ADDR_DIFF_VEC. */
76 unsigned min_after_vec
: 1; /* minimum address target label is
77 after the ADDR_DIFF_VEC. */
78 unsigned max_after_vec
: 1; /* maximum address target label is
79 after the ADDR_DIFF_VEC. */
80 unsigned min_after_base
: 1; /* minimum address target label is
82 unsigned max_after_base
: 1; /* maximum address target label is
84 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
85 unsigned offset_unsigned
: 1; /* offsets have to be treated as unsigned. */
88 } addr_diff_vec_flags
;
90 /* Structure used to describe the attributes of a MEM. These are hashed
91 so MEMs that the same attributes share a data structure. This means
92 they cannot be modified in place. If any element is nonzero, it means
93 the value of the corresponding attribute is unknown. */
94 /* ALIGN and SIZE are the alignment and size of the MEM itself,
95 while EXPR can describe a larger underlying object, which might have a
96 stricter alignment; OFFSET is the offset of the MEM within that object. */
97 typedef struct mem_attrs
GTY(())
99 HOST_WIDE_INT alias
; /* Memory alias set. */
100 tree expr
; /* expr corresponding to MEM. */
101 rtx offset
; /* Offset from start of DECL, as CONST_INT. */
102 rtx size
; /* Size in bytes, as a CONST_INT. */
103 unsigned int align
; /* Alignment of MEM in bits. */
106 /* Structure used to describe the attributes of a REG in similar way as
107 mem_attrs does for MEM above. */
109 typedef struct reg_attrs
GTY(())
111 tree decl
; /* decl corresponding to REG. */
112 HOST_WIDE_INT offset
; /* Offset from start of DECL. */
115 /* Common union for an element of an rtx. */
119 HOST_WIDE_INT rtwint
;
125 enum machine_mode rttype
;
126 addr_diff_vec_flags rt_addr_diff_vec_flags
;
127 struct cselib_val_struct
*rt_cselib
;
128 struct bitmap_head_def
*rtbit
;
130 struct basic_block_def
*bb
;
134 typedef union rtunion_def rtunion
;
136 /* RTL expression ("rtx"). */
138 struct rtx_def
GTY((chain_next ("RTX_NEXT (&%h)"),
139 chain_prev ("RTX_PREV (&%h)")))
141 /* The kind of expression this is. */
142 ENUM_BITFIELD(rtx_code
) code
: 16;
144 /* The kind of value the expression has. */
145 ENUM_BITFIELD(machine_mode
) mode
: 8;
147 /* 1 in a MEM if we should keep the alias set for this mem unchanged
148 when we access a component.
149 1 in a CALL_INSN if it is a sibling call.
150 1 in a SET that is for a return.
151 In a CODE_LABEL, part of the two-bit alternate entry field. */
152 unsigned int jump
: 1;
153 /* In a CODE_LABEL, part of the two-bit alternate entry field.
154 1 in a MEM if it cannot trap. */
155 unsigned int call
: 1;
156 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
157 1 in a SUBREG if it references an unsigned object whose mode has been
158 from a promoted to a wider mode.
159 1 in a SYMBOL_REF if it addresses something in the per-function
161 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
162 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
163 unsigned int unchanging
: 1;
164 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
165 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
166 if it has been deleted.
167 1 in a REG expression if corresponds to a variable declared by the user,
168 0 for an internally generated temporary.
169 1 in a SUBREG with a negative value.
170 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
171 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
172 unsigned int volatil
: 1;
173 /* 1 in a MEM referring to a field of an aggregate.
174 0 if the MEM was a variable or the result of a * operator in C;
175 1 if it was the result of a . or -> operator (on a struct) in C.
176 1 in a REG if the register is used only in exit code a loop.
177 1 in a SUBREG expression if was generated from a variable with a
179 1 in a CODE_LABEL if the label is used for nonlocal gotos
180 and must not be deleted even if its count is zero.
181 1 in a LABEL_REF if this is a reference to a label outside the
183 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
184 together with the preceding insn. Valid only within sched.
185 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
186 from the target of a branch. Valid from reorg until end of compilation;
188 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
189 dead code. Valid only during dead-code elimination phase; cleared
191 unsigned int in_struct
: 1;
192 /* At the end of RTL generation, 1 if this rtx is used. This is used for
193 copying shared structure. See `unshare_all_rtl'.
194 In a REG, this is not needed for that purpose, and used instead
195 in `leaf_renumber_regs_insn'.
196 1 in a SYMBOL_REF, means that emit_library_call
197 has used it as the function. */
198 unsigned int used
: 1;
199 /* Nonzero if this rtx came from procedure integration.
200 1 in a REG or PARALLEL means this rtx refers to the return value
201 of the current function.
202 1 in a SYMBOL_REF if the symbol is weak. */
203 unsigned integrated
: 1;
204 /* 1 in an INSN or a SET if this rtx is related to the call frame,
205 either changing how we compute the frame address or saving and
206 restoring registers in the prologue and epilogue.
207 1 in a MEM if the MEM refers to a scalar, rather than a member of
209 1 in a REG if the register is a pointer.
210 1 in a SYMBOL_REF if it addresses something in the per-function
211 constant string pool. */
212 unsigned frame_related
: 1;
214 /* The first element of the operands of this rtx.
215 The number of operands and their types are controlled
216 by the `code' field, according to rtl.def. */
217 rtunion
GTY ((special ("rtx_def"),
218 desc ("GET_CODE (&%0)"))) fld
[1];
221 #define NULL_RTX (rtx) 0
223 /* The "next" and "previous" RTX, relative to this one. */
225 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
226 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
228 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
230 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
231 || GET_CODE (X) == CALL_INSN \
232 || GET_CODE (X) == JUMP_INSN \
233 || GET_CODE (X) == NOTE \
234 || GET_CODE (X) == BARRIER \
235 || GET_CODE (X) == CODE_LABEL) \
236 && PREV_INSN (X) != NULL \
237 && NEXT_INSN (PREV_INSN (X)) == X \
238 ? PREV_INSN (X) : NULL)
240 /* Define macros to access the `code' field of the rtx. */
242 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
243 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE))
245 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
246 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE))
248 /* RTL vector. These appear inside RTX's when there is a need
249 for a variable number of things. The principle use is inside
250 PARALLEL expressions. */
252 struct rtvec_def
GTY(()) {
253 int num_elem
; /* number of elements */
254 rtx
GTY ((length ("%h.num_elem"))) elem
[1];
257 #define NULL_RTVEC (rtvec) 0
259 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
260 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
262 /* Predicate yielding nonzero iff X is an rtl for a register. */
263 #define REG_P(X) (GET_CODE (X) == REG)
265 /* Predicate yielding nonzero iff X is a label insn. */
266 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
268 /* Predicate yielding nonzero iff X is a jump insn. */
269 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
271 /* Predicate yielding nonzero iff X is a note insn. */
272 #define NOTE_P(X) (GET_CODE (X) == NOTE)
274 /* Predicate yielding nonzero iff X is a barrier insn. */
275 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
277 /* Predicate yielding nonzero iff X is a data for a jump table. */
278 #define JUMP_TABLE_DATA_P(INSN) \
279 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
280 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
282 /* 1 if X is a constant value that is an integer. */
284 #define CONSTANT_P(X) \
285 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
286 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
287 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
288 || GET_CODE (X) == CONST_VECTOR \
289 || GET_CODE (X) == CONSTANT_P_RTX)
291 /* General accessor macros for accessing the fields of an rtx. */
293 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
294 /* The bit with a star outside the statement expr and an & inside is
295 so that N can be evaluated only once. */
296 #define RTL_CHECK1(RTX, N, C1) __extension__ \
297 (*({ rtx const _rtx = (RTX); const int _n = (N); \
298 const enum rtx_code _code = GET_CODE (_rtx); \
299 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
300 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
302 if (GET_RTX_FORMAT(_code)[_n] != C1) \
303 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
307 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
308 (*({ rtx const _rtx = (RTX); const int _n = (N); \
309 const enum rtx_code _code = GET_CODE (_rtx); \
310 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
311 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
313 if (GET_RTX_FORMAT(_code)[_n] != C1 \
314 && GET_RTX_FORMAT(_code)[_n] != C2) \
315 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
319 #define RTL_CHECKC1(RTX, N, C) __extension__ \
320 (*({ rtx const _rtx = (RTX); const int _n = (N); \
321 if (GET_CODE (_rtx) != (C)) \
322 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
326 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
327 (*({ rtx const _rtx = (RTX); const int _n = (N); \
328 const enum rtx_code _code = GET_CODE (_rtx); \
329 if (_code != (C1) && _code != (C2)) \
330 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
334 #define RTVEC_ELT(RTVEC, I) __extension__ \
335 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
336 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
337 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
339 &_rtvec->elem[_i]; }))
341 extern void rtl_check_failed_bounds
PARAMS ((rtx
, int,
342 const char *, int, const char *))
344 extern void rtl_check_failed_type1
PARAMS ((rtx
, int, int,
345 const char *, int, const char *))
347 extern void rtl_check_failed_type2
PARAMS ((rtx
, int, int, int,
348 const char *, int, const char *))
350 extern void rtl_check_failed_code1
PARAMS ((rtx
, enum rtx_code
,
351 const char *, int, const char *))
353 extern void rtl_check_failed_code2
PARAMS ((rtx
, enum rtx_code
, enum rtx_code
,
354 const char *, int, const char *))
356 extern void rtvec_check_failed_bounds
PARAMS ((rtvec
, int,
357 const char *, int, const char *))
360 #else /* not ENABLE_RTL_CHECKING */
362 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N])
363 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N])
364 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N])
365 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N])
366 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
370 /* General accessor macros for accessing the flags of an rtx. */
372 /* Access an individual rtx flag, with no checking of any kind. */
373 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
375 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
376 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
377 ({ rtx const _rtx = (RTX); \
378 if (GET_CODE(_rtx) != C1) \
379 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
383 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
384 ({ rtx const _rtx = (RTX); \
385 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
386 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
390 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
391 ({ rtx const _rtx = (RTX); \
392 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
393 && GET_CODE(_rtx) != C3) \
394 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
398 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
399 ({ rtx const _rtx = (RTX); \
400 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
401 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
402 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
406 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
407 ({ rtx const _rtx = (RTX); \
408 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
409 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
410 && GET_CODE(_rtx) != C5) \
411 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
415 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
417 ({ rtx const _rtx = (RTX); \
418 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
419 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
420 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
421 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
425 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
427 ({ rtx const _rtx = (RTX); \
428 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
429 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
430 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
431 && GET_CODE(_rtx) != C7) \
432 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
436 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
438 ({ rtx const _rtx = (RTX); \
439 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
440 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
441 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
442 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
443 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
447 extern void rtl_check_failed_flag
PARAMS ((const char *, rtx
, const char *,
452 #else /* not ENABLE_RTL_FLAG_CHECKING */
454 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
455 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
456 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
457 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
458 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
459 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
460 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
461 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
464 #define CLEAR_RTX_FLAGS(RTX) \
466 rtx const _rtx = (RTX); \
468 _rtx->frame_related = 0; \
469 _rtx->in_struct = 0; \
470 _rtx->integrated = 0; \
472 _rtx->unchanging = 0; \
477 #define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint)
478 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
479 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
480 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
481 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
482 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
483 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
484 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
485 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
486 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
488 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
489 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
491 /* These are like XWINT, etc. except that they expect a '0' field instead
492 of the normal type code. */
494 #define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint)
495 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
496 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
497 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
498 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
499 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
500 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
501 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
502 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
503 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
504 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
505 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
506 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
507 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
509 #define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint)
510 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
511 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
512 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
513 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
514 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
515 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
516 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
517 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
518 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
519 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
520 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
522 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
523 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
525 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
527 /* ACCESS MACROS for particular fields of insns. */
529 /* Determines whether X is an insn. */
530 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
532 /* Holds a unique number for each insn.
533 These are not necessarily sequentially increasing. */
534 #define INSN_UID(INSN) XINT (INSN, 0)
536 /* Chain insns together in sequence. */
537 #define PREV_INSN(INSN) XEXP (INSN, 1)
538 #define NEXT_INSN(INSN) XEXP (INSN, 2)
540 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
541 #define INSN_SCOPE(INSN) XTREE (INSN, 4)
542 /* The body of an insn. */
543 #define PATTERN(INSN) XEXP (INSN, 5)
545 /* Code number of instruction, from when it was recognized.
546 -1 means this instruction has not been recognized yet. */
547 #define INSN_CODE(INSN) XINT (INSN, 6)
549 /* Set up in flow.c; empty before then.
550 Holds a chain of INSN_LIST rtx's whose first operands point at
551 previous insns with direct data-flow connections to this one.
552 That means that those insns set variables whose next use is in this insn.
553 They are always in the same basic block as this insn. */
554 #define LOG_LINKS(INSN) XEXP(INSN, 7)
556 #define RTX_INTEGRATED_P(RTX) \
557 (RTL_FLAG_CHECK8("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \
558 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \
560 #define RTX_UNCHANGING_P(RTX) \
561 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
562 #define RTX_FRAME_RELATED_P(RTX) \
563 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
564 JUMP_INSN, BARRIER, SET)->frame_related)
566 /* 1 if RTX is an insn that has been deleted. */
567 #define INSN_DELETED_P(RTX) \
568 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
569 CODE_LABEL, BARRIER, NOTE)->volatil)
571 /* 1 if RTX is a call to a const or pure function. */
572 #define CONST_OR_PURE_CALL_P(RTX) \
573 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
574 EXPR_LIST)->unchanging)
576 /* 1 if RTX is a call_insn for a sibling call. */
577 #define SIBLING_CALL_P(RTX) \
578 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
580 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
581 #define INSN_ANNULLED_BRANCH_P(RTX) \
582 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
584 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
585 elimination phase. */
586 #define INSN_DEAD_CODE_P(RTX) \
587 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
589 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
590 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
591 executed if the branch is taken. For annulled branches with this bit
592 clear, the insn should be executed only if the branch is not taken. */
593 #define INSN_FROM_TARGET_P(RTX) \
594 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
596 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
598 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
600 /* Holds a list of notes on what this insn does to various REGs.
601 It is a chain of EXPR_LIST rtx's, where the second operand is the
602 chain pointer and the first operand is the REG being described.
603 The mode field of the EXPR_LIST contains not a real machine mode
604 but a value from enum reg_note. */
606 #define REG_NOTES(INSN) XEXP(INSN, 8)
608 /* Don't forget to change reg_note_name in rtl.c. */
611 /* The value in REG dies in this insn (i.e., it is not needed past
612 this insn). If REG is set in this insn, the REG_DEAD note may,
613 but need not, be omitted. */
616 /* The REG is autoincremented or autodecremented. */
619 /* Describes the insn as a whole; it says that the insn sets a register
620 to a constant value or to be equivalent to a memory address. If the
621 register is spilled to the stack then the constant value should be
622 substituted for it. The contents of the REG_EQUIV is the constant
623 value or memory address, which may be different from the source of
624 the SET although it has the same value. A REG_EQUIV note may also
625 appear on an insn which copies a register parameter to a pseudo-register,
626 if there is a memory address which could be used to hold that
627 pseudo-register throughout the function. */
630 /* Like REG_EQUIV except that the destination is only momentarily equal
631 to the specified rtx. Therefore, it cannot be used for substitution;
632 but it can be used for cse. */
635 /* The register set in this insn held 0 before the insn. The contents of
636 the note is the insn that stored the 0. If that insn is deleted or
637 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note
638 is actually an INSN_LIST, not an EXPR_LIST. */
641 /* This insn copies the return-value of a library call out of the hard reg
642 for return values. This note is actually an INSN_LIST and it points to
643 the first insn involved in setting up arguments for the call. flow.c
644 uses this to delete the entire library call when its result is dead. */
647 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
648 and points at the one that has the REG_RETVAL. This note is also an
652 /* The register is always nonnegative during the containing loop. This is
653 used in branches so that decrement and branch instructions terminating
654 on zero can be matched. There must be an insn pattern in the md file
655 named `decrement_and_branch_until_zero' or else this will never be added
656 to any instructions. */
659 /* There is no conflict *after this insn* between the register in the note
660 and the destination of this insn. */
663 /* Identifies a register set in this insn and never used. */
666 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
667 respectively. Normally, these are required to be consecutive insns, but
668 we permit putting a cc0-setting insn in the delay slot of a branch as
669 long as only one copy of the insn exists. In that case, these notes
670 point from one to the other to allow code generation to determine what
671 any require information and to properly update CC_STATUS. These notes
673 REG_CC_SETTER
, REG_CC_USER
,
675 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
676 CODE_LABEL contained in the REG_LABEL note is used by the insn.
677 This note is an INSN_LIST. */
680 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
681 write-after-read and write-after-write dependencies respectively.
682 Data dependencies, which are the only type of LOG_LINK created by
683 flow, are represented by a 0 reg note kind. */
684 REG_DEP_ANTI
, REG_DEP_OUTPUT
,
686 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
687 It has an integer value. For jumps, it is the probability that this is a
688 taken branch. For calls, it is the probability that this call won't
692 /* Attached to a call insn; indicates that the call is malloc-like and
693 that the pointer returned cannot alias anything else. */
696 /* Used to optimize rtl generated by dynamic stack allocations for targets
697 where SETJMP_VIA_SAVE_AREA is true. */
700 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
701 CONCAT of two integer value. First specifies the branch predictor
702 that added the note, second specifies the predicted hitrate of branch
703 in the same format as REG_BR_PROB note uses. */
706 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
707 for DWARF to interpret what they imply. The attached rtx is used
708 instead of intuition. */
709 REG_FRAME_RELATED_EXPR
,
711 /* Indicates that REG holds the exception context for the function.
712 This context is shared by inline functions, so the code to acquire
713 the real exception context is delayed until after inlining. */
716 /* Indicates what exception region an INSN belongs in. This is used to
717 indicate what region to which a call may throw. REGION 0 indicates
718 that a call cannot throw at all. REGION -1 indicates that it cannot
719 throw, nor will it execute a non-local goto. */
722 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
725 /* Indicates that this insn (which is part of the prologue) computes
726 a value which might not be used later, and if so it's OK to delete
727 the insn. Normally, deleting any insn in the prologue is an error.
728 At present the parameter is unused and set to (const_int 0). */
731 /* Indicates that a call does not return. */
734 /* Indicates that an indirect jump is a non-local goto instead of a
738 /* This kind of note is generated at each to `setjmp',
739 and similar functions that can return twice. */
742 /* Indicate calls that always returns. */
745 /* Indicate that the memory load references a vtable. The expression
746 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
750 /* The base value for branch probability notes. */
751 #define REG_BR_PROB_BASE 10000
753 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
754 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
755 #define PUT_REG_NOTE_KIND(LINK, KIND) \
756 PUT_MODE (LINK, (enum machine_mode) (KIND))
758 /* Names for REG_NOTE's in EXPR_LIST insn's. */
760 extern const char * const reg_note_name
[];
761 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
763 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
764 USE and CLOBBER expressions.
765 USE expressions list the registers filled with arguments that
766 are passed to the function.
767 CLOBBER expressions document the registers explicitly clobbered
769 Pseudo registers can not be mentioned in this list. */
770 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
772 /* The label-number of a code-label. The assembler label
773 is made from `L' and the label-number printed in decimal.
774 Label numbers are unique in a compilation. */
775 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
777 #define LINE_NUMBER NOTE
779 /* In a NOTE that is a line number, this is a string for the file name that the
780 line is in. We use the same field to record block numbers temporarily in
781 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
782 between ints and pointers if we use a different macro for the block number.)
785 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
786 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
787 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
788 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
789 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
790 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
791 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
793 /* In a NOTE that is a line number, this is the line number.
794 Other kinds of NOTEs are identified by negative numbers here. */
795 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
797 /* Nonzero if INSN is a note marking the beginning of a basic block. */
798 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
799 (GET_CODE (INSN) == NOTE \
800 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
802 /* Algorithm and flags for prediction. */
803 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
804 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
805 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
807 /* Codes that appear in the NOTE_LINE_NUMBER field
808 for kinds of notes that are not line numbers.
810 Notice that we do not try to use zero here for any of
811 the special note codes because sometimes the source line
812 actually can be zero! This happens (for example) when we
813 are generating code for the per-translation-unit constructor
814 and destructor routines for some C++ translation unit.
816 If you should change any of the following values, or if you
817 should add a new value here, don't forget to change the
818 note_insn_name array in rtl.c. */
822 /* Keep all of these numbers negative. Adjust as needed. */
823 NOTE_INSN_BIAS
= -100,
825 /* This note is used to get rid of an insn
826 when it isn't safe to patch the insn out of the chain. */
829 /* These are used to mark the beginning and end of a lexical block.
830 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
834 /* These mark the extremes of a loop. */
838 /* Generated at the place in a loop that `continue' jumps to. */
840 /* Generated at the start of a duplicated exit test. */
843 /* Generated at the end of a conditional at the top of the loop.
844 This is used to perform a lame form of loop rotation in lieu
845 of actually understanding the loop structure. The note is
846 discarded after rotation is complete. */
847 NOTE_INSN_LOOP_END_TOP_COND
,
849 /* This kind of note is generated at the end of the function body,
850 just before the return insn or return label. In an optimizing
851 compilation it is deleted by the first jump optimization, after
852 enabling that optimizer to determine whether control can fall
853 off the end of the function body without a return statement. */
854 NOTE_INSN_FUNCTION_END
,
856 /* This marks the point immediately after the last prologue insn. */
857 NOTE_INSN_PROLOGUE_END
,
859 /* This marks the point immediately prior to the first epilogue insn. */
860 NOTE_INSN_EPILOGUE_BEG
,
862 /* Generated in place of user-declared labels when they are deleted. */
863 NOTE_INSN_DELETED_LABEL
,
865 /* This note indicates the start of the real body of the function,
866 i.e. the point just after all of the parms have been moved into
868 NOTE_INSN_FUNCTION_BEG
,
870 /* These note where exception handling regions begin and end.
871 Uses NOTE_EH_HANDLER to identify the region in question. */
872 NOTE_INSN_EH_REGION_BEG
,
873 NOTE_INSN_EH_REGION_END
,
875 /* Generated whenever a duplicate line number note is output. For example,
876 one is output after the end of an inline function, in order to prevent
877 the line containing the inline call from being counted twice in gcov. */
878 NOTE_INSN_REPEATED_LINE_NUMBER
,
880 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
881 NOTE_INSN_BASIC_BLOCK
,
883 /* Record the expected value of a register at a location. Uses
884 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
885 NOTE_INSN_EXPECTED_VALUE
,
887 /* Record a prediction. Uses NOTE_PREDICTION. */
888 NOTE_INSN_PREDICTION
,
893 /* Names for NOTE insn's other than line numbers. */
895 extern const char * const note_insn_name
[NOTE_INSN_MAX
- NOTE_INSN_BIAS
];
896 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
897 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
899 /* The name of a label, in case it corresponds to an explicit label
900 in the input source code. */
901 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
903 /* In jump.c, each label contains a count of the number
904 of LABEL_REFs that point at it, so unused labels can be deleted. */
905 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
907 /* Labels carry a two-bit field composed of the ->jump and ->call
908 bits. This field indicates whether the label is an alternate
909 entry point, and if so, what kind. */
912 LABEL_NORMAL
= 0, /* ordinary label */
913 LABEL_STATIC_ENTRY
, /* alternate entry point, not exported */
914 LABEL_GLOBAL_ENTRY
, /* alternate entry point, exported */
915 LABEL_WEAK_ENTRY
/* alternate entry point, exported as weak symbol */
918 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
920 /* Retrieve the kind of LABEL. */
921 #define LABEL_KIND(LABEL) __extension__ \
922 ({ rtx const _label = (LABEL); \
923 if (GET_CODE (_label) != CODE_LABEL) \
924 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
926 (enum label_kind) ((_label->jump << 1) | _label->call); })
928 /* Set the kind of LABEL. */
929 #define SET_LABEL_KIND(LABEL, KIND) do { \
930 rtx _label = (LABEL); \
931 unsigned int _kind = (KIND); \
932 if (GET_CODE (_label) != CODE_LABEL) \
933 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
935 _label->jump = ((_kind >> 1) & 1); \
936 _label->call = (_kind & 1); \
941 /* Retrieve the kind of LABEL. */
942 #define LABEL_KIND(LABEL) \
943 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
945 /* Set the kind of LABEL. */
946 #define SET_LABEL_KIND(LABEL, KIND) do { \
947 rtx _label = (LABEL); \
948 unsigned int _kind = (KIND); \
949 _label->jump = ((_kind >> 1) & 1); \
950 _label->call = (_kind & 1); \
953 #endif /* rtl flag checking */
955 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
957 /* The original regno this ADDRESSOF was built for. */
958 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
960 /* The variable in the register we took the address of. */
961 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
963 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
964 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
965 be decremented and possibly the label can be deleted. */
966 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
968 /* Once basic blocks are found in flow.c,
969 each CODE_LABEL starts a chain that goes through
970 all the LABEL_REFs that jump to that label.
971 The chain eventually winds up at the CODE_LABEL: it is circular. */
972 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
974 /* This is the field in the LABEL_REF through which the circular chain
975 of references to a particular label is linked.
976 This chain is set up in flow.c. */
978 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
980 /* Once basic blocks are found in flow.c,
981 Each LABEL_REF points to its containing instruction with this field. */
983 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
985 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
986 the number the register originally had; for a pseudo register turned into
987 a hard reg this will hold the old pseudo register number. */
989 #define REGNO(RTX) XCUINT (RTX, 0, REG)
990 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
992 /* 1 if RTX is a reg or parallel that is the current function's return
994 #define REG_FUNCTION_VALUE_P(RTX) \
995 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated)
997 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
998 #define REG_USERVAR_P(RTX) \
999 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1001 /* 1 if RTX is a reg that holds a pointer value. */
1002 #define REG_POINTER(RTX) \
1003 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1005 /* 1 if the given register REG corresponds to a hard register. */
1006 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1008 /* 1 if the given register number REG_NO corresponds to a hard register. */
1009 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1011 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1013 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1015 /* For a CONST_DOUBLE:
1016 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1017 low-order word and ..._HIGH the high-order.
1018 For a float, there is a REAL_VALUE_TYPE structure, and
1019 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1020 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1021 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1022 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1024 /* For a CONST_VECTOR, return element #n. */
1025 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1027 /* For a CONST_VECTOR, return the number of elements in a vector. */
1028 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1030 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1031 SUBREG_BYTE extracts the byte-number. */
1033 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1034 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1037 extern unsigned int subreg_lsb
PARAMS ((rtx
));
1038 extern unsigned int subreg_regno_offset
PARAMS ((unsigned int,
1041 enum machine_mode
));
1042 extern bool subreg_offset_representable_p
PARAMS ((unsigned int,
1045 enum machine_mode
));
1046 extern unsigned int subreg_regno
PARAMS ((rtx
));
1048 /* 1 if RTX is a subreg containing a reg that is already known to be
1049 sign- or zero-extended from the mode of the subreg to the mode of
1050 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1053 When used as a LHS, is means that this extension must be done
1054 when assigning to SUBREG_REG. */
1056 #define SUBREG_PROMOTED_VAR_P(RTX) \
1057 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1059 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1061 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1063 _rtx->volatil = 1; \
1065 _rtx->volatil = 0; \
1066 _rtx->unchanging = (VAL); \
1069 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1070 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1071 ? -1 : (RTX)->unchanging)
1073 /* Access various components of an ASM_OPERANDS rtx. */
1075 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1076 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1077 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1078 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1079 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1080 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1081 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1082 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1083 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1084 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1085 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1086 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1087 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1088 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1089 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1091 /* 1 if RTX is a mem and we should keep the alias set for this mem
1092 unchanged when we access a component. Set to 1, or example, when we
1093 are already in a non-addressable component of an aggregate. */
1094 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1095 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1097 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1098 #define MEM_VOLATILE_P(RTX) \
1099 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1100 ASM_INPUT)->volatil)
1102 /* 1 if RTX is a mem that refers to an aggregate, either to the
1103 aggregate itself of to a field of the aggregate. If zero, RTX may
1104 or may not be such a reference. */
1105 #define MEM_IN_STRUCT_P(RTX) \
1106 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1108 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may
1109 not refer to a scalar. */
1110 #define MEM_SCALAR_P(RTX) \
1111 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related)
1113 /* 1 if RTX is a mem that cannot trap. */
1114 #define MEM_NOTRAP_P(RTX) \
1115 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1117 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1118 RTX. Otherwise, vice versa. Use this macro only when you are
1119 *sure* that you know that the MEM is in a structure, or is a
1120 scalar. VAL is evaluated only once. */
1121 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1125 MEM_IN_STRUCT_P (RTX) = 1; \
1126 MEM_SCALAR_P (RTX) = 0; \
1130 MEM_IN_STRUCT_P (RTX) = 0; \
1131 MEM_SCALAR_P (RTX) = 1; \
1135 /* The memory attribute block. We provide access macros for each value
1136 in the block and provide defaults if none specified. */
1137 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1139 /* The register attribute block. We provide access macros for each value
1140 in the block and provide defaults if none specified. */
1141 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1143 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1144 set, and may alias anything. Otherwise, the MEM can only alias
1145 MEMs in a conflicting alias set. This value is set in a
1146 language-dependent manner in the front-end, and should not be
1147 altered in the back-end. These set numbers are tested with
1148 alias_sets_conflict_p. */
1149 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1151 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1152 refer to part of a DECL. It may also be a COMPONENT_REF. */
1153 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1155 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1156 RTX that is always a CONST_INT. */
1157 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1159 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1160 is always a CONST_INT. */
1161 #define MEM_SIZE(RTX) \
1162 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1163 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1166 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1167 mode as a default when STRICT_ALIGNMENT, but not if not. */
1168 #define MEM_ALIGN(RTX) \
1169 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1170 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1171 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1173 /* For a REG rtx, the decl it is known to refer to, if it is known to
1174 refer to part of a DECL. */
1175 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1177 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1178 RTX that is always a CONST_INT. */
1179 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1181 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1182 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1183 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1184 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1185 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1186 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1187 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1188 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1189 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1191 /* 1 if RTX is a label_ref to a label outside the loop containing the
1193 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1194 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1196 /* 1 if RTX is a label_ref for a nonlocal label. */
1197 /* Likewise in an expr_list for a reg_label note. */
1198 #define LABEL_REF_NONLOCAL_P(RTX) \
1199 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1200 REG_LABEL)->volatil)
1202 /* 1 if RTX is a code_label that should always be considered to be needed. */
1203 #define LABEL_PRESERVE_P(RTX) \
1204 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1206 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1207 #define REG_LOOP_TEST_P(RTX) \
1208 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1210 /* During sched, 1 if RTX is an insn that must be scheduled together
1211 with the preceding insn. */
1212 #define SCHED_GROUP_P(RTX) \
1213 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1216 /* For a SET rtx, SET_DEST is the place that is set
1217 and SET_SRC is the value it is set to. */
1218 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1219 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1220 #define SET_IS_RETURN_P(RTX) \
1221 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1223 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1224 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1225 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1227 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1228 conditionally executing the code on, COND_EXEC_CODE is the code
1229 to execute if the condition is true. */
1230 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1231 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1233 /* 1 if RTX is a symbol_ref that addresses this function's constants pool. */
1234 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1235 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1237 /* 1 if RTX is a symbol_ref that addresses this function's string constant
1239 #define STRING_POOL_ADDRESS_P(RTX) \
1240 (RTL_FLAG_CHECK1("STRING_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->frame_related)
1242 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1243 #define SYMBOL_REF_FLAG(RTX) \
1244 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1246 /* 1 if RTX is a symbol_ref that has been the library function in
1247 emit_library_call. */
1248 #define SYMBOL_REF_USED(RTX) \
1249 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1251 /* 1 if RTX is a symbol_ref for a weak symbol. */
1252 #define SYMBOL_REF_WEAK(RTX) \
1253 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated)
1255 /* The tree (decl or constant) associated with the symbol, or null. */
1256 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1258 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1259 information derivable from the tree decl associated with this symbol.
1260 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1261 decl. In some cases this is a bug. But beyond that, it's nice to cache
1262 this information to avoid recomputing it. Finally, this allows space for
1263 the target to store more than one bit of information, as with
1265 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1267 /* These flags are common enough to be defined for all targets. They
1268 are computed by the default version of targetm.encode_section_info. */
1270 /* Set if this symbol is a function. */
1271 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1272 #define SYMBOL_REF_FUNCTION_P(RTX) \
1273 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1274 /* Set if targetm.binds_local_p is true. */
1275 #define SYMBOL_FLAG_LOCAL (1 << 1)
1276 #define SYMBOL_REF_LOCAL_P(RTX) \
1277 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1278 /* Set if targetm.in_small_data_p is true. */
1279 #define SYMBOL_FLAG_SMALL (1 << 2)
1280 #define SYMBOL_REF_SMALL_P(RTX) \
1281 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1282 /* The three-bit field at [5:3] is true for TLS variables; use
1283 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1284 #define SYMBOL_FLAG_TLS_SHIFT 3
1285 #define SYMBOL_REF_TLS_MODEL(RTX) \
1286 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1287 /* Set if this symbol is not defined in this translation unit. */
1288 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1289 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1290 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1292 /* Subsequent bits are available for the target to use. */
1293 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1294 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1296 /* Define a macro to look for REG_INC notes,
1297 but save time on machines where they never exist. */
1299 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1300 #define FIND_REG_INC_NOTE(INSN, REG) \
1301 ((REG) != NULL_RTX && REG_P ((REG)) \
1302 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1303 : find_reg_note ((INSN), REG_INC, (REG)))
1305 #define FIND_REG_INC_NOTE(INSN, REG) 0
1308 /* Indicate whether the machine has any sort of auto increment addressing.
1309 If not, we can avoid checking for REG_INC notes. */
1311 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1312 #define AUTO_INC_DEC
1315 #ifndef HAVE_PRE_INCREMENT
1316 #define HAVE_PRE_INCREMENT 0
1319 #ifndef HAVE_PRE_DECREMENT
1320 #define HAVE_PRE_DECREMENT 0
1323 #ifndef HAVE_POST_INCREMENT
1324 #define HAVE_POST_INCREMENT 0
1327 #ifndef HAVE_POST_DECREMENT
1328 #define HAVE_POST_DECREMENT 0
1331 #ifndef HAVE_POST_MODIFY_DISP
1332 #define HAVE_POST_MODIFY_DISP 0
1335 #ifndef HAVE_POST_MODIFY_REG
1336 #define HAVE_POST_MODIFY_REG 0
1339 #ifndef HAVE_PRE_MODIFY_DISP
1340 #define HAVE_PRE_MODIFY_DISP 0
1343 #ifndef HAVE_PRE_MODIFY_REG
1344 #define HAVE_PRE_MODIFY_REG 0
1348 /* Some architectures do not have complete pre/post increment/decrement
1349 instruction sets, or only move some modes efficiently. These macros
1350 allow us to tune autoincrement generation. */
1352 #ifndef USE_LOAD_POST_INCREMENT
1353 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1356 #ifndef USE_LOAD_POST_DECREMENT
1357 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1360 #ifndef USE_LOAD_PRE_INCREMENT
1361 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1364 #ifndef USE_LOAD_PRE_DECREMENT
1365 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1368 #ifndef USE_STORE_POST_INCREMENT
1369 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1372 #ifndef USE_STORE_POST_DECREMENT
1373 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1376 #ifndef USE_STORE_PRE_INCREMENT
1377 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1380 #ifndef USE_STORE_PRE_DECREMENT
1381 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1384 /* Determine if the insn is a PHI node. */
1385 #define PHI_NODE_P(X) \
1386 ((X) && GET_CODE (X) == INSN \
1387 && GET_CODE (PATTERN (X)) == SET \
1388 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1390 /* Nonzero if we need to distinguish between the return value of this function
1391 and the return value of a function called by this function. This helps
1393 This is 1 until after the rtl generation pass. */
1394 extern int rtx_equal_function_value_matters
;
1396 /* Nonzero when we are generating CONCATs. */
1397 extern int generating_concat_p
;
1399 /* Generally useful functions. */
1402 extern int ceil_log2
PARAMS ((unsigned HOST_WIDE_INT
));
1404 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1407 extern rtx expand_builtin_expect_jump
PARAMS ((tree
, rtx
, rtx
));
1408 extern void purge_builtin_constant_p
PARAMS ((void));
1411 extern void set_stack_check_libfunc
PARAMS ((rtx
));
1412 extern HOST_WIDE_INT trunc_int_for_mode
PARAMS ((HOST_WIDE_INT
,
1413 enum machine_mode
));
1414 extern rtx plus_constant_wide
PARAMS ((rtx
, HOST_WIDE_INT
));
1415 extern rtx plus_constant_for_output_wide
PARAMS ((rtx
, HOST_WIDE_INT
));
1416 extern void optimize_save_area_alloca
PARAMS ((rtx
));
1419 extern rtx gen_rtx
PARAMS ((enum rtx_code
,
1420 enum machine_mode
, ...));
1421 extern rtvec gen_rtvec
PARAMS ((int, ...));
1422 extern rtx copy_insn_1
PARAMS ((rtx
));
1423 extern rtx copy_insn
PARAMS ((rtx
));
1424 extern rtx gen_int_mode
PARAMS ((HOST_WIDE_INT
,
1425 enum machine_mode
));
1426 extern rtx emit_copy_of_insn_after
PARAMS ((rtx
, rtx
));
1427 extern void set_reg_attrs_from_mem
PARAMS ((rtx
, rtx
));
1428 extern void set_mem_attrs_from_reg
PARAMS ((rtx
, rtx
));
1429 extern void set_reg_attrs_for_parm
PARAMS ((rtx
, rtx
));
1432 extern rtx rtx_alloc
PARAMS ((RTX_CODE
));
1433 extern rtvec rtvec_alloc
PARAMS ((int));
1434 extern rtx copy_rtx
PARAMS ((rtx
));
1437 extern rtx copy_rtx_if_shared
PARAMS ((rtx
));
1440 extern rtx copy_most_rtx
PARAMS ((rtx
, rtx
));
1441 extern rtx shallow_copy_rtx
PARAMS ((rtx
));
1442 extern int rtx_equal_p
PARAMS ((rtx
, rtx
));
1445 extern rtvec gen_rtvec_v
PARAMS ((int, rtx
*));
1446 extern rtx gen_reg_rtx
PARAMS ((enum machine_mode
));
1447 extern rtx gen_rtx_REG_offset
PARAMS ((rtx
, enum machine_mode
,
1448 unsigned int, int));
1449 extern rtx gen_label_rtx
PARAMS ((void));
1450 extern int subreg_hard_regno
PARAMS ((rtx
, int));
1451 extern rtx gen_lowpart_common
PARAMS ((enum machine_mode
, rtx
));
1452 extern rtx gen_lowpart
PARAMS ((enum machine_mode
, rtx
));
1455 extern rtx gen_lowpart_if_possible
PARAMS ((enum machine_mode
, rtx
));
1458 extern rtx gen_highpart
PARAMS ((enum machine_mode
, rtx
));
1459 extern rtx gen_highpart_mode
PARAMS ((enum machine_mode
,
1460 enum machine_mode
, rtx
));
1461 extern rtx gen_realpart
PARAMS ((enum machine_mode
, rtx
));
1462 extern rtx gen_imagpart
PARAMS ((enum machine_mode
, rtx
));
1463 extern rtx operand_subword
PARAMS ((rtx
, unsigned int, int,
1464 enum machine_mode
));
1465 extern rtx constant_subword
PARAMS ((rtx
, int,
1466 enum machine_mode
));
1469 extern rtx operand_subword_force
PARAMS ((rtx
, unsigned int,
1470 enum machine_mode
));
1471 extern int subreg_lowpart_p
PARAMS ((rtx
));
1472 extern unsigned int subreg_lowpart_offset
PARAMS ((enum machine_mode
,
1473 enum machine_mode
));
1474 extern unsigned int subreg_highpart_offset
PARAMS ((enum machine_mode
,
1475 enum machine_mode
));
1476 extern rtx make_safe_from
PARAMS ((rtx
, rtx
));
1477 extern rtx convert_memory_address
PARAMS ((enum machine_mode
, rtx
));
1478 extern rtx get_insns
PARAMS ((void));
1479 extern const char *get_insn_name
PARAMS ((int));
1480 extern rtx get_last_insn
PARAMS ((void));
1481 extern rtx get_last_insn_anywhere
PARAMS ((void));
1482 extern rtx get_first_nonnote_insn
PARAMS ((void));
1483 extern rtx get_last_nonnote_insn
PARAMS ((void));
1484 extern void start_sequence
PARAMS ((void));
1485 extern void push_to_sequence
PARAMS ((rtx
));
1486 extern void end_sequence
PARAMS ((void));
1487 extern void push_to_full_sequence
PARAMS ((rtx
, rtx
));
1488 extern void end_full_sequence
PARAMS ((rtx
*, rtx
*));
1491 extern rtx immed_double_const
PARAMS ((HOST_WIDE_INT
, HOST_WIDE_INT
, enum machine_mode
));
1492 extern rtx mem_for_const_double
PARAMS ((rtx
));
1493 extern rtx force_const_mem
PARAMS ((enum machine_mode
, rtx
));
1496 extern rtx get_pool_constant
PARAMS ((rtx
));
1497 extern rtx get_pool_constant_mark
PARAMS ((rtx
, bool *));
1498 extern enum machine_mode get_pool_mode
PARAMS ((rtx
));
1499 extern rtx get_pool_constant_for_function
PARAMS ((struct function
*, rtx
));
1500 extern enum machine_mode get_pool_mode_for_function
PARAMS ((struct function
*, rtx
));
1501 extern int get_pool_offset
PARAMS ((rtx
));
1502 extern rtx simplify_subtraction
PARAMS ((rtx
));
1505 extern rtx assign_stack_local
PARAMS ((enum machine_mode
,
1506 HOST_WIDE_INT
, int));
1507 extern rtx assign_stack_temp
PARAMS ((enum machine_mode
,
1508 HOST_WIDE_INT
, int));
1509 extern rtx assign_stack_temp_for_type
PARAMS ((enum machine_mode
,
1510 HOST_WIDE_INT
, int, tree
));
1511 extern rtx assign_temp
PARAMS ((tree
, int, int, int));
1513 extern rtx emit_insn_before
PARAMS ((rtx
, rtx
));
1514 extern rtx emit_insn_before_scope
PARAMS ((rtx
, rtx
, tree
));
1515 extern rtx emit_jump_insn_before
PARAMS ((rtx
, rtx
));
1516 extern rtx emit_jump_insn_before_scope
PARAMS ((rtx
, rtx
, tree
));
1517 extern rtx emit_call_insn_before
PARAMS ((rtx
, rtx
));
1518 extern rtx emit_call_insn_before_scope
PARAMS ((rtx
, rtx
, tree
));
1519 extern rtx emit_barrier_before
PARAMS ((rtx
));
1520 extern rtx emit_label_before
PARAMS ((rtx
, rtx
));
1521 extern rtx emit_note_before
PARAMS ((int, rtx
));
1522 extern rtx emit_insn_after
PARAMS ((rtx
, rtx
));
1523 extern rtx emit_insn_after_scope
PARAMS ((rtx
, rtx
, tree
));
1524 extern rtx emit_jump_insn_after
PARAMS ((rtx
, rtx
));
1525 extern rtx emit_jump_insn_after_scope
PARAMS ((rtx
, rtx
, tree
));
1526 extern rtx emit_call_insn_after
PARAMS ((rtx
, rtx
));
1527 extern rtx emit_call_insn_after_scope
PARAMS ((rtx
, rtx
, tree
));
1528 extern rtx emit_barrier_after
PARAMS ((rtx
));
1529 extern rtx emit_label_after
PARAMS ((rtx
, rtx
));
1530 extern rtx emit_note_after
PARAMS ((int, rtx
));
1531 extern rtx emit_line_note_after
PARAMS ((const char *, int, rtx
));
1532 extern rtx emit_insn
PARAMS ((rtx
));
1533 extern rtx emit_jump_insn
PARAMS ((rtx
));
1534 extern rtx emit_call_insn
PARAMS ((rtx
));
1535 extern rtx emit_label
PARAMS ((rtx
));
1536 extern rtx emit_barrier
PARAMS ((void));
1537 extern rtx emit_line_note
PARAMS ((const char *, int));
1538 extern rtx emit_note
PARAMS ((const char *, int));
1539 extern rtx emit_line_note_force
PARAMS ((const char *, int));
1540 extern rtx make_insn_raw
PARAMS ((rtx
));
1541 extern rtx previous_insn
PARAMS ((rtx
));
1542 extern rtx next_insn
PARAMS ((rtx
));
1543 extern rtx prev_nonnote_insn
PARAMS ((rtx
));
1544 extern rtx next_nonnote_insn
PARAMS ((rtx
));
1545 extern rtx prev_real_insn
PARAMS ((rtx
));
1546 extern rtx next_real_insn
PARAMS ((rtx
));
1547 extern rtx prev_active_insn
PARAMS ((rtx
));
1548 extern rtx next_active_insn
PARAMS ((rtx
));
1549 extern int active_insn_p
PARAMS ((rtx
));
1550 extern rtx prev_label
PARAMS ((rtx
));
1551 extern rtx next_label
PARAMS ((rtx
));
1552 extern rtx next_cc0_user
PARAMS ((rtx
));
1553 extern rtx prev_cc0_setter
PARAMS ((rtx
));
1555 /* In cfglayout.c */
1556 extern tree choose_inner_scope
PARAMS ((tree
, tree
));
1559 extern rtx next_nondeleted_insn
PARAMS ((rtx
));
1560 extern enum rtx_code reverse_condition
PARAMS ((enum rtx_code
));
1561 extern enum rtx_code reverse_condition_maybe_unordered
PARAMS ((enum rtx_code
));
1562 extern enum rtx_code swap_condition
PARAMS ((enum rtx_code
));
1563 extern enum rtx_code unsigned_condition
PARAMS ((enum rtx_code
));
1564 extern enum rtx_code signed_condition
PARAMS ((enum rtx_code
));
1565 extern void mark_jump_label
PARAMS ((rtx
, rtx
, int));
1566 extern void cleanup_barriers
PARAMS ((void));
1569 extern bool squeeze_notes
PARAMS ((rtx
*, rtx
*));
1570 extern rtx delete_related_insns
PARAMS ((rtx
));
1571 extern void delete_jump
PARAMS ((rtx
));
1572 extern void delete_barrier
PARAMS ((rtx
));
1573 extern rtx get_label_before
PARAMS ((rtx
));
1574 extern rtx get_label_after
PARAMS ((rtx
));
1575 extern rtx follow_jumps
PARAMS ((rtx
));
1578 extern rtx
*find_constant_term_loc
PARAMS ((rtx
*));
1581 extern rtx try_split
PARAMS ((rtx
, rtx
, int));
1582 extern int split_branch_probability
;
1584 /* In unknown file */
1585 extern rtx split_insns
PARAMS ((rtx
, rtx
));
1587 /* In simplify-rtx.c */
1588 extern rtx simplify_unary_operation
PARAMS ((enum rtx_code
,
1589 enum machine_mode
, rtx
,
1590 enum machine_mode
));
1591 extern rtx simplify_binary_operation
PARAMS ((enum rtx_code
,
1592 enum machine_mode
, rtx
,
1594 extern rtx simplify_ternary_operation
PARAMS ((enum rtx_code
,
1596 enum machine_mode
, rtx
, rtx
,
1598 extern rtx simplify_relational_operation
PARAMS ((enum rtx_code
,
1599 enum machine_mode
, rtx
,
1601 extern rtx simplify_gen_binary
PARAMS ((enum rtx_code
,
1604 extern rtx simplify_gen_unary
PARAMS ((enum rtx_code
,
1605 enum machine_mode
, rtx
,
1606 enum machine_mode
));
1607 extern rtx simplify_gen_ternary
PARAMS ((enum rtx_code
,
1611 extern rtx simplify_gen_relational
PARAMS ((enum rtx_code
,
1615 extern rtx simplify_subreg
PARAMS ((enum machine_mode
,
1619 extern rtx simplify_gen_subreg
PARAMS ((enum machine_mode
,
1623 extern rtx simplify_replace_rtx
PARAMS ((rtx
, rtx
, rtx
));
1624 extern rtx simplify_rtx
PARAMS ((rtx
));
1625 extern rtx avoid_constant_pool_reference
PARAMS ((rtx
));
1628 extern rtx gen_mem_addressof
PARAMS ((rtx
, tree
, int));
1631 extern enum machine_mode choose_hard_reg_mode
PARAMS ((unsigned int,
1635 extern rtx set_unique_reg_note
PARAMS ((rtx
, enum reg_note
, rtx
));
1637 /* Functions in rtlanal.c */
1639 /* Single set is implemented as macro for performance reasons. */
1640 #define single_set(I) (INSN_P (I) \
1641 ? (GET_CODE (PATTERN (I)) == SET \
1642 ? PATTERN (I) : single_set_1 (I)) \
1644 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1646 /* Structure used for passing data to REPLACE_LABEL. */
1647 typedef struct replace_label_data
1651 bool update_label_nuses
;
1652 } replace_label_data
;
1654 extern int rtx_addr_can_trap_p
PARAMS ((rtx
));
1655 extern bool nonzero_address_p
PARAMS ((rtx
));
1656 extern int rtx_unstable_p
PARAMS ((rtx
));
1657 extern int rtx_varies_p
PARAMS ((rtx
, int));
1658 extern int rtx_addr_varies_p
PARAMS ((rtx
, int));
1659 extern HOST_WIDE_INT get_integer_term
PARAMS ((rtx
));
1660 extern rtx get_related_value
PARAMS ((rtx
));
1661 extern rtx get_jump_table_offset
PARAMS ((rtx
, rtx
*));
1662 extern int global_reg_mentioned_p
PARAMS ((rtx
));
1663 extern int reg_mentioned_p
PARAMS ((rtx
, rtx
));
1664 extern int count_occurrences
PARAMS ((rtx
, rtx
, int));
1665 extern int reg_referenced_p
PARAMS ((rtx
, rtx
));
1666 extern int reg_used_between_p
PARAMS ((rtx
, rtx
, rtx
));
1667 extern int reg_referenced_between_p
PARAMS ((rtx
, rtx
, rtx
));
1668 extern int reg_set_between_p
PARAMS ((rtx
, rtx
, rtx
));
1669 extern int regs_set_between_p
PARAMS ((rtx
, rtx
, rtx
));
1670 extern int commutative_operand_precedence
PARAMS ((rtx
));
1671 extern int swap_commutative_operands_p
PARAMS ((rtx
, rtx
));
1672 extern int modified_between_p
PARAMS ((rtx
, rtx
, rtx
));
1673 extern int no_labels_between_p
PARAMS ((rtx
, rtx
));
1674 extern int no_jumps_between_p
PARAMS ((rtx
, rtx
));
1675 extern int modified_in_p
PARAMS ((rtx
, rtx
));
1676 extern int insn_dependent_p
PARAMS ((rtx
, rtx
));
1677 extern int reg_set_p
PARAMS ((rtx
, rtx
));
1678 extern rtx single_set_2
PARAMS ((rtx
, rtx
));
1679 extern int multiple_sets
PARAMS ((rtx
));
1680 extern int set_noop_p
PARAMS ((rtx
));
1681 extern int noop_move_p
PARAMS ((rtx
));
1682 extern rtx find_last_value
PARAMS ((rtx
, rtx
*, rtx
, int));
1683 extern int refers_to_regno_p
PARAMS ((unsigned int, unsigned int,
1685 extern int reg_overlap_mentioned_p
PARAMS ((rtx
, rtx
));
1686 extern rtx set_of
PARAMS ((rtx
, rtx
));
1687 extern void note_stores
PARAMS ((rtx
,
1688 void (*) (rtx
, rtx
, void *),
1690 extern void note_uses
PARAMS ((rtx
*,
1691 void (*) (rtx
*, void *),
1693 extern rtx reg_set_last
PARAMS ((rtx
, rtx
));
1694 extern int dead_or_set_p
PARAMS ((rtx
, rtx
));
1695 extern int dead_or_set_regno_p
PARAMS ((rtx
, unsigned int));
1696 extern rtx find_reg_note
PARAMS ((rtx
, enum reg_note
, rtx
));
1697 extern rtx find_regno_note
PARAMS ((rtx
, enum reg_note
,
1699 extern rtx find_reg_equal_equiv_note
PARAMS ((rtx
));
1700 extern int find_reg_fusage
PARAMS ((rtx
, enum rtx_code
, rtx
));
1701 extern int find_regno_fusage
PARAMS ((rtx
, enum rtx_code
,
1703 extern int pure_call_p
PARAMS ((rtx
));
1704 extern void remove_note
PARAMS ((rtx
, rtx
));
1705 extern int side_effects_p
PARAMS ((rtx
));
1706 extern int volatile_refs_p
PARAMS ((rtx
));
1707 extern int volatile_insn_p
PARAMS ((rtx
));
1708 extern int may_trap_p
PARAMS ((rtx
));
1709 extern int inequality_comparisons_p
PARAMS ((rtx
));
1710 extern rtx replace_rtx
PARAMS ((rtx
, rtx
, rtx
));
1711 extern rtx replace_regs
PARAMS ((rtx
, rtx
*, unsigned int,
1713 extern int replace_label
PARAMS ((rtx
*, void *));
1714 extern int rtx_referenced_p
PARAMS ((rtx
, rtx
));
1715 extern bool tablejump_p
PARAMS ((rtx
, rtx
*, rtx
*));
1716 extern int computed_jump_p
PARAMS ((rtx
));
1717 typedef int (*rtx_function
) PARAMS ((rtx
*, void *));
1718 extern int for_each_rtx
PARAMS ((rtx
*, rtx_function
, void *));
1719 extern rtx regno_use_in
PARAMS ((unsigned int, rtx
));
1720 extern int auto_inc_p
PARAMS ((rtx
));
1721 extern int in_expr_list_p
PARAMS ((rtx
, rtx
));
1722 extern void remove_node_from_expr_list
PARAMS ((rtx
, rtx
*));
1723 extern int insns_safe_to_move_p
PARAMS ((rtx
, rtx
, rtx
*));
1724 extern int loc_mentioned_in_p
PARAMS ((rtx
*, rtx
));
1725 extern rtx find_first_parameter_load
PARAMS ((rtx
, rtx
));
1726 extern bool keep_with_call_p
PARAMS ((rtx
));
1730 extern rtx find_use_as_address
PARAMS ((rtx
, rtx
, HOST_WIDE_INT
));
1734 void free_EXPR_LIST_list
PARAMS ((rtx
*));
1735 void free_INSN_LIST_list
PARAMS ((rtx
*));
1736 void free_EXPR_LIST_node
PARAMS ((rtx
));
1737 void free_INSN_LIST_node
PARAMS ((rtx
));
1738 rtx alloc_INSN_LIST
PARAMS ((rtx
, rtx
));
1739 rtx alloc_EXPR_LIST
PARAMS ((int, rtx
, rtx
));
1743 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1744 Always at least 3, since the combiner could put that many togetherm
1745 and we want this to remain correct for all the remaining passes. */
1747 extern int max_parallel
;
1749 /* Free up register info memory. */
1750 extern void free_reg_info
PARAMS ((void));
1753 extern int asm_noperands
PARAMS ((rtx
));
1754 extern const char *decode_asm_operands
PARAMS ((rtx
, rtx
*, rtx
**,
1756 enum machine_mode
*));
1758 extern enum reg_class reg_preferred_class
PARAMS ((int));
1759 extern enum reg_class reg_alternate_class
PARAMS ((int));
1761 extern rtx get_first_nonparm_insn
PARAMS ((void));
1763 extern void split_all_insns
PARAMS ((int));
1764 extern void split_all_insns_noflow
PARAMS ((void));
1766 #define MAX_SAVED_CONST_INT 64
1767 extern GTY(()) rtx const_int_rtx
[MAX_SAVED_CONST_INT
* 2 + 1];
1769 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1770 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1771 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1772 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1773 extern GTY(()) rtx const_true_rtx
;
1775 extern GTY(()) rtx const_tiny_rtx
[3][(int) MAX_MACHINE_MODE
];
1777 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1778 same as VOIDmode. */
1780 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1782 /* Likewise, for the constants 1 and 2. */
1784 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1785 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1787 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1788 is used to represent the frame pointer. This is because the
1789 hard frame pointer and the automatic variables are separated by an amount
1790 that cannot be determined until after register allocation. We can assume
1791 that in this case ELIMINABLE_REGS will be defined, one action of which
1792 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1793 #ifndef HARD_FRAME_POINTER_REGNUM
1794 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1797 /* Index labels for global_rtl. */
1798 enum global_rtl_index
1804 /* For register elimination to work properly these hard_frame_pointer_rtx,
1805 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1806 the same register. */
1807 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1808 GR_ARG_POINTER
= GR_FRAME_POINTER
,
1810 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1811 GR_HARD_FRAME_POINTER
= GR_FRAME_POINTER
,
1813 GR_HARD_FRAME_POINTER
,
1815 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1816 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1817 GR_ARG_POINTER
= GR_HARD_FRAME_POINTER
,
1822 GR_VIRTUAL_INCOMING_ARGS
,
1823 GR_VIRTUAL_STACK_ARGS
,
1824 GR_VIRTUAL_STACK_DYNAMIC
,
1825 GR_VIRTUAL_OUTGOING_ARGS
,
1831 /* Pointers to standard pieces of rtx are stored here. */
1832 extern GTY(()) rtx global_rtl
[GR_MAX
];
1834 /* Standard pieces of rtx, to be substituted directly into things. */
1835 #define pc_rtx (global_rtl[GR_PC])
1836 #define cc0_rtx (global_rtl[GR_CC0])
1838 /* All references to certain hard regs, except those created
1839 by allocating pseudo regs into them (when that's possible),
1840 go through these unique rtx objects. */
1841 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1842 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1843 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1844 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1846 extern GTY(()) rtx pic_offset_table_rtx
;
1847 extern GTY(()) rtx struct_value_rtx
;
1848 extern GTY(()) rtx struct_value_incoming_rtx
;
1849 extern GTY(()) rtx static_chain_rtx
;
1850 extern GTY(()) rtx static_chain_incoming_rtx
;
1851 extern GTY(()) rtx return_address_pointer_rtx
;
1853 /* Include the RTL generation functions. */
1859 /* There are some RTL codes that require special attention; the
1860 generation functions included above do the raw handling. If you
1861 add to this list, modify special_rtx in gengenrtl.c as well. You
1862 should also modify gen_rtx to use the special function. */
1864 extern rtx gen_rtx_CONST_INT
PARAMS ((enum machine_mode
, HOST_WIDE_INT
));
1865 extern rtx gen_rtx_CONST_VECTOR
PARAMS ((enum machine_mode
, rtvec
));
1866 extern rtx gen_raw_REG
PARAMS ((enum machine_mode
, int));
1867 extern rtx gen_rtx_REG
PARAMS ((enum machine_mode
, unsigned));
1868 extern rtx gen_rtx_SUBREG
PARAMS ((enum machine_mode
, rtx
, int));
1869 extern rtx gen_rtx_MEM
PARAMS ((enum machine_mode
, rtx
));
1871 extern rtx gen_lowpart_SUBREG
PARAMS ((enum machine_mode
, rtx
));
1873 /* We need the cast here to ensure that we get the same result both with
1874 and without prototypes. */
1875 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1877 /* Virtual registers are used during RTL generation to refer to locations into
1878 the stack frame when the actual location isn't known until RTL generation
1879 is complete. The routine instantiate_virtual_regs replaces these with
1880 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1883 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1885 /* This points to the first word of the incoming arguments passed on the stack,
1886 either by the caller or by the callee when pretending it was passed by the
1889 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1891 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1893 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1894 variable on the stack. Otherwise, it points to the first variable on
1897 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1899 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1901 /* This points to the location of dynamically-allocated memory on the stack
1902 immediately after the stack pointer has been adjusted by the amount
1905 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1907 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1909 /* This points to the location in the stack at which outgoing arguments should
1910 be written when the stack is pre-pushed (arguments pushed using push
1911 insns always use sp). */
1913 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1915 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1917 /* This points to the Canonical Frame Address of the function. This
1918 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1919 but is calculated relative to the arg pointer for simplicity; the
1920 frame pointer nor stack pointer are necessarily fixed relative to
1921 the CFA until after reload. */
1923 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1925 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1927 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1929 /* Nonzero if REGNUM is a pointer into the stack frame. */
1930 #define REGNO_PTR_FRAME_P(REGNUM) \
1931 ((REGNUM) == STACK_POINTER_REGNUM \
1932 || (REGNUM) == FRAME_POINTER_REGNUM \
1933 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1934 || (REGNUM) == ARG_POINTER_REGNUM \
1935 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1936 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1938 /* REGNUM never really appearing in the INSN stream. */
1939 #define INVALID_REGNUM (~(unsigned int) 0)
1941 extern rtx find_next_ref
PARAMS ((rtx
, rtx
));
1943 extern rtx output_constant_def
PARAMS ((tree
, int));
1945 /* Define a default value for STORE_FLAG_VALUE. */
1947 #ifndef STORE_FLAG_VALUE
1948 #define STORE_FLAG_VALUE 1
1951 /* Nonzero after the second flow pass has completed.
1952 Set to 1 or 0 by toplev.c */
1953 extern int flow2_completed
;
1955 /* Nonzero after end of reload pass.
1956 Set to 1 or 0 by reload1.c. */
1958 extern int reload_completed
;
1960 /* Set to 1 while reload_as_needed is operating.
1961 Required by some machines to handle any generated moves differently. */
1963 extern int reload_in_progress
;
1965 /* If this is nonzero, we do not bother generating VOLATILE
1966 around volatile memory references, and we are willing to
1967 output indirect addresses. If cse is to follow, we reject
1968 indirect addresses so a useful potential cse is generated;
1969 if it is used only once, instruction combination will produce
1970 the same indirect address eventually. */
1971 extern int cse_not_expected
;
1973 /* Set to nonzero before life analysis to indicate that it is unsafe to
1974 generate any new pseudo registers. */
1975 extern int no_new_pseudos
;
1977 /* Translates rtx code to tree code, for those codes needed by
1978 REAL_ARITHMETIC. The function returns an int because the caller may not
1979 know what `enum tree_code' means. */
1981 extern int rtx_to_tree_code
PARAMS ((enum rtx_code
));
1984 struct cse_basic_block_data
;
1986 /* Return the right cost to give to an operation
1987 to make the cost of the corresponding register-to-register instruction
1988 N times that of a fast register-to-register instruction. */
1989 #define COSTS_N_INSNS(N) ((N) * 4)
1991 /* Maximum cost of a rtl expression. This value has the special meaning
1992 not to use an rtx with this cost under any circumstances. */
1993 #define MAX_COST INT_MAX
1995 extern int rtx_cost
PARAMS ((rtx
, enum rtx_code
));
1996 extern int address_cost
PARAMS ((rtx
, enum machine_mode
));
1997 extern int delete_trivially_dead_insns
PARAMS ((rtx
, int));
1999 extern int cse_main
PARAMS ((rtx
, int, int, FILE *));
2001 extern void cse_end_of_basic_block
PARAMS ((rtx
,
2002 struct cse_basic_block_data
*,
2006 extern int comparison_dominates_p
PARAMS ((enum rtx_code
, enum rtx_code
));
2007 extern int condjump_p
PARAMS ((rtx
));
2008 extern int any_condjump_p
PARAMS ((rtx
));
2009 extern int any_uncondjump_p
PARAMS ((rtx
));
2010 extern int safe_to_remove_jump_p
PARAMS ((rtx
));
2011 extern rtx pc_set
PARAMS ((rtx
));
2012 extern rtx condjump_label
PARAMS ((rtx
));
2013 extern int simplejump_p
PARAMS ((rtx
));
2014 extern int returnjump_p
PARAMS ((rtx
));
2015 extern int onlyjump_p
PARAMS ((rtx
));
2016 extern int only_sets_cc0_p
PARAMS ((rtx
));
2017 extern int sets_cc0_p
PARAMS ((rtx
));
2018 extern int invert_jump_1
PARAMS ((rtx
, rtx
));
2019 extern int invert_jump
PARAMS ((rtx
, rtx
, int));
2020 extern int rtx_renumbered_equal_p
PARAMS ((rtx
, rtx
));
2021 extern int true_regnum
PARAMS ((rtx
));
2022 extern unsigned int reg_or_subregno
PARAMS ((rtx
));
2023 extern int redirect_jump_1
PARAMS ((rtx
, rtx
));
2024 extern int redirect_jump
PARAMS ((rtx
, rtx
, int));
2025 extern void rebuild_jump_labels
PARAMS ((rtx
));
2026 extern enum rtx_code reversed_comparison_code
PARAMS ((rtx
, rtx
));
2027 extern enum rtx_code reversed_comparison_code_parts
PARAMS ((enum rtx_code
,
2029 extern void delete_for_peephole
PARAMS ((rtx
, rtx
));
2030 extern int condjump_in_parallel_p
PARAMS ((rtx
));
2031 extern void never_reached_warning
PARAMS ((rtx
, rtx
));
2032 extern void purge_line_number_notes
PARAMS ((rtx
));
2033 extern void copy_loop_headers
PARAMS ((rtx
));
2035 /* In emit-rtl.c. */
2036 extern int max_reg_num
PARAMS ((void));
2037 extern int max_label_num
PARAMS ((void));
2038 extern int get_first_label_num
PARAMS ((void));
2039 extern void delete_insns_since
PARAMS ((rtx
));
2040 extern void mark_reg_pointer
PARAMS ((rtx
, int));
2041 extern void mark_user_reg
PARAMS ((rtx
));
2042 extern void reset_used_flags
PARAMS ((rtx
));
2043 extern void reorder_insns
PARAMS ((rtx
, rtx
, rtx
));
2044 extern void reorder_insns_nobb
PARAMS ((rtx
, rtx
, rtx
));
2045 extern int get_max_uid
PARAMS ((void));
2046 extern int in_sequence_p
PARAMS ((void));
2047 extern void force_next_line_note
PARAMS ((void));
2048 extern void init_emit
PARAMS ((void));
2049 extern void init_emit_once
PARAMS ((int));
2050 extern void push_topmost_sequence
PARAMS ((void));
2051 extern void pop_topmost_sequence
PARAMS ((void));
2052 extern int subreg_realpart_p
PARAMS ((rtx
));
2053 extern void reverse_comparison
PARAMS ((rtx
));
2054 extern void set_new_first_and_last_insn
PARAMS ((rtx
, rtx
));
2055 extern void set_new_first_and_last_label_num
PARAMS ((int, int));
2056 extern void set_new_last_label_num
PARAMS ((int));
2057 extern void unshare_all_rtl_again
PARAMS ((rtx
));
2058 extern void set_first_insn
PARAMS ((rtx
));
2059 extern void set_last_insn
PARAMS ((rtx
));
2060 extern void link_cc0_insns
PARAMS ((rtx
));
2061 extern void add_insn
PARAMS ((rtx
));
2062 extern void add_insn_before
PARAMS ((rtx
, rtx
));
2063 extern void add_insn_after
PARAMS ((rtx
, rtx
));
2064 extern void remove_insn
PARAMS ((rtx
));
2065 extern void reorder_insns_with_line_notes
PARAMS ((rtx
, rtx
, rtx
));
2066 extern void emit_insn_after_with_line_notes
PARAMS ((rtx
, rtx
, rtx
));
2067 extern enum rtx_code classify_insn
PARAMS ((rtx
));
2068 extern rtx emit
PARAMS ((rtx
));
2069 /* Query and clear/ restore no_line_numbers. This is used by the
2070 switch / case handling in stmt.c to give proper line numbers in
2071 warnings about unreachable code. */
2072 int force_line_numbers
PARAMS ((void));
2073 void restore_line_number_status
PARAMS ((int old_value
));
2074 extern void renumber_insns
PARAMS ((FILE *));
2075 extern void remove_unnecessary_notes
PARAMS ((void));
2076 extern rtx delete_insn
PARAMS ((rtx
));
2077 extern void delete_insn_chain
PARAMS ((rtx
, rtx
));
2078 extern rtx delete_insn_and_edges
PARAMS ((rtx
));
2079 extern void delete_insn_chain_and_edges
PARAMS ((rtx
, rtx
));
2082 extern int combine_instructions
PARAMS ((rtx
, unsigned int));
2083 extern unsigned int extended_count
PARAMS ((rtx
, enum machine_mode
, int));
2084 extern rtx remove_death
PARAMS ((unsigned int, rtx
));
2086 extern void dump_combine_stats
PARAMS ((FILE *));
2087 extern void dump_combine_total_stats
PARAMS ((FILE *));
2092 extern void schedule_insns
PARAMS ((FILE *));
2093 extern void schedule_ebbs
PARAMS ((FILE *));
2095 extern void fix_sched_param
PARAMS ((const char *, const char *));
2097 /* In print-rtl.c */
2098 extern const char *print_rtx_head
;
2099 extern void debug_rtx
PARAMS ((rtx
));
2100 extern void debug_rtx_list
PARAMS ((rtx
, int));
2101 extern void debug_rtx_range
PARAMS ((rtx
, rtx
));
2102 extern rtx debug_rtx_find
PARAMS ((rtx
, int));
2104 extern void print_mem_expr
PARAMS ((FILE *, tree
));
2105 extern void print_rtl
PARAMS ((FILE *, rtx
));
2106 extern void print_simple_rtl
PARAMS ((FILE *, rtx
));
2107 extern int print_rtl_single
PARAMS ((FILE *, rtx
));
2108 extern void print_inline_rtx
PARAMS ((FILE *, rtx
, int));
2112 extern void init_loop
PARAMS ((void));
2113 extern rtx libcall_other_reg
PARAMS ((rtx
, rtx
));
2115 extern void loop_optimize
PARAMS ((rtx
, FILE *, int));
2117 extern void record_excess_regs
PARAMS ((rtx
, rtx
, rtx
*));
2120 extern void reposition_prologue_and_epilogue_notes
PARAMS ((rtx
));
2121 extern void thread_prologue_and_epilogue_insns
PARAMS ((rtx
));
2122 extern int prologue_epilogue_contains
PARAMS ((rtx
));
2123 extern int sibcall_epilogue_contains
PARAMS ((rtx
));
2124 extern void preserve_rtl_expr_result
PARAMS ((rtx
));
2125 extern void mark_temp_addr_taken
PARAMS ((rtx
));
2126 extern void update_temp_slot_address
PARAMS ((rtx
, rtx
));
2127 extern void purge_addressof
PARAMS ((rtx
));
2128 extern void purge_hard_subreg_sets
PARAMS ((rtx
));
2131 extern void set_file_and_line_for_stmt
PARAMS ((const char *, int));
2132 extern void expand_null_return
PARAMS ((void));
2133 extern void emit_jump
PARAMS ((rtx
));
2134 extern int preserve_subexpressions_p
PARAMS ((void));
2137 extern void move_by_pieces
PARAMS ((rtx
, rtx
,
2138 unsigned HOST_WIDE_INT
,
2142 extern void recompute_reg_usage
PARAMS ((rtx
, int));
2143 extern int initialize_uninitialized_subregs
PARAMS ((void));
2144 extern void delete_dead_jumptables
PARAMS ((void));
2146 extern void print_rtl_with_bb
PARAMS ((FILE *, rtx
));
2147 extern void dump_flow_info
PARAMS ((FILE *));
2151 extern void init_expmed
PARAMS ((void));
2152 extern void expand_inc
PARAMS ((rtx
, rtx
));
2153 extern void expand_dec
PARAMS ((rtx
, rtx
));
2154 extern rtx expand_mult_highpart
PARAMS ((enum machine_mode
, rtx
,
2155 unsigned HOST_WIDE_INT
, rtx
,
2159 extern bool can_copy_p
PARAMS ((enum machine_mode
));
2161 extern int gcse_main
PARAMS ((rtx
, FILE *));
2162 extern int bypass_jumps
PARAMS ((FILE *));
2166 extern void mark_elimination
PARAMS ((int, int));
2168 extern int global_alloc
PARAMS ((FILE *));
2169 extern void dump_global_regs
PARAMS ((FILE *));
2172 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2173 extern void retry_global_alloc
PARAMS ((int, HARD_REG_SET
));
2175 extern void build_insn_chain
PARAMS ((rtx
));
2178 extern int reg_classes_intersect_p
PARAMS ((enum reg_class
, enum reg_class
));
2179 extern int reg_class_subset_p
PARAMS ((enum reg_class
, enum reg_class
));
2180 extern void globalize_reg
PARAMS ((int));
2181 extern void init_regs
PARAMS ((void));
2182 extern void init_fake_stack_mems
PARAMS ((void));
2183 extern void init_reg_sets
PARAMS ((void));
2184 extern void regset_release_memory
PARAMS ((void));
2185 extern void regclass_init
PARAMS ((void));
2186 extern void regclass
PARAMS ((rtx
, int, FILE *));
2187 extern void reg_scan
PARAMS ((rtx
, unsigned int, int));
2188 extern void reg_scan_update
PARAMS ((rtx
, rtx
, unsigned int));
2189 extern void fix_register
PARAMS ((const char *, int, int));
2191 extern void cannot_change_mode_set_regs
PARAMS ((HARD_REG_SET
*,
2195 extern bool invalid_mode_change_p
PARAMS ((unsigned int,
2197 enum machine_mode
));
2199 extern int delete_null_pointer_checks
PARAMS ((rtx
));
2203 extern void regmove_optimize
PARAMS ((rtx
, int, FILE *));
2205 extern void combine_stack_adjustments
PARAMS ((void));
2209 extern void dbr_schedule
PARAMS ((rtx
, FILE *));
2212 /* In local-alloc.c */
2214 extern void dump_local_alloc
PARAMS ((FILE *));
2216 extern int local_alloc
PARAMS ((void));
2217 extern int function_invariant_p
PARAMS ((rtx
));
2220 extern void coverage_init (const char *);
2221 extern void coverage_finish (void);
2222 extern void coverage_end_function (void);
2225 extern void init_branch_prob
PARAMS ((void));
2226 extern void branch_prob
PARAMS ((void));
2227 extern void end_branch_prob
PARAMS ((void));
2229 /* In reg-stack.c */
2231 extern bool reg_to_stack
PARAMS ((rtx
, FILE *));
2234 /* In fold-const.c */
2235 extern int add_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2236 unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2237 unsigned HOST_WIDE_INT
*,
2239 extern int neg_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2240 unsigned HOST_WIDE_INT
*,
2242 extern int mul_double
PARAMS ((unsigned HOST_WIDE_INT
,
2244 unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2245 unsigned HOST_WIDE_INT
*,
2247 extern void lshift_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2248 HOST_WIDE_INT
, unsigned int,
2249 unsigned HOST_WIDE_INT
*,
2250 HOST_WIDE_INT
*, int));
2251 extern void rshift_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2252 HOST_WIDE_INT
, unsigned int,
2253 unsigned HOST_WIDE_INT
*,
2254 HOST_WIDE_INT
*, int));
2255 extern void lrotate_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2256 HOST_WIDE_INT
, unsigned int,
2257 unsigned HOST_WIDE_INT
*,
2259 extern void rrotate_double
PARAMS ((unsigned HOST_WIDE_INT
, HOST_WIDE_INT
,
2260 HOST_WIDE_INT
, unsigned int,
2261 unsigned HOST_WIDE_INT
*,
2270 LCT_CONST_MAKE_BLOCK
= 3,
2271 LCT_PURE_MAKE_BLOCK
= 4,
2274 LCT_ALWAYS_RETURN
= 7,
2275 LCT_RETURNS_TWICE
= 8
2278 extern void emit_library_call
PARAMS ((rtx
, enum libcall_type
,
2279 enum machine_mode
, int,
2281 extern rtx emit_library_call_value
PARAMS ((rtx
, rtx
, enum libcall_type
,
2282 enum machine_mode
, int,
2286 extern int set_dominates_use
PARAMS ((int, int, int, rtx
, rtx
));
2289 extern int in_data_section
PARAMS ((void));
2290 extern void init_varasm_once
PARAMS ((void));
2293 extern void init_rtl
PARAMS ((void));
2294 extern void traverse_md_constants
PARAMS ((int (*) (void **, void *),
2296 struct md_constant
{ char *name
, *value
; };
2299 extern int read_skip_spaces
PARAMS ((FILE *));
2300 extern rtx read_rtx
PARAMS ((FILE *));
2303 extern const char *read_rtx_filename
;
2304 extern int read_rtx_lineno
;
2306 /* Redefine abort to report an internal error w/o coredump, and
2307 reporting the location of the error in the source file. This logic
2308 is duplicated in rtl.h and tree.h because every file that needs the
2309 special abort includes one or both. toplev.h gets too few files,
2310 system.h gets too many. */
2312 extern void fancy_abort
PARAMS ((const char *, int, const char *))
2314 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2317 extern void clear_reg_alias_info
PARAMS ((rtx
));
2318 extern rtx canon_rtx
PARAMS ((rtx
));
2319 extern int true_dependence
PARAMS ((rtx
, enum machine_mode
, rtx
,
2320 int (*)(rtx
, int)));
2321 extern rtx get_addr
PARAMS ((rtx
));
2322 extern int canon_true_dependence
PARAMS ((rtx
, enum machine_mode
, rtx
,
2323 rtx
, int (*)(rtx
, int)));
2324 extern int read_dependence
PARAMS ((rtx
, rtx
));
2325 extern int anti_dependence
PARAMS ((rtx
, rtx
));
2326 extern int output_dependence
PARAMS ((rtx
, rtx
));
2327 extern void mark_constant_function
PARAMS ((void));
2328 extern void init_alias_once
PARAMS ((void));
2329 extern void init_alias_analysis
PARAMS ((void));
2330 extern void end_alias_analysis
PARAMS ((void));
2331 extern rtx addr_side_effect_eval
PARAMS ((rtx
, int, int));
2332 extern bool memory_modified_in_insn_p
PARAMS ((rtx
, rtx
));
2333 extern rtx find_base_term
PARAMS ((rtx
));
2337 sibcall_use_normal
= 1,
2338 sibcall_use_tail_recursion
,
2342 extern void optimize_sibling_and_tail_recursive_calls
PARAMS ((void));
2343 extern void replace_call_placeholder
PARAMS ((rtx
, sibcall_use_t
));
2346 extern int stack_regs_mentioned
PARAMS ((rtx insn
));
2350 extern GTY(()) rtx stack_limit_rtx
;
2352 /* In regrename.c */
2353 extern void regrename_optimize
PARAMS ((void));
2354 extern void copyprop_hardreg_forward
PARAMS ((void));
2357 extern void if_convert
PARAMS ((int));
2360 extern void invert_br_probabilities
PARAMS ((rtx
));
2361 extern bool expensive_function_p
PARAMS ((int));
2363 extern void tracer
PARAMS ((void));
2367 /* Nonzero if this is a call to a `const' function. */
2369 /* Nonzero if this is a call to a `volatile' function. */
2370 #define ECF_NORETURN 2
2371 /* Nonzero if this is a call to malloc or a related function. */
2372 #define ECF_MALLOC 4
2373 /* Nonzero if it is plausible that this is a call to alloca. */
2374 #define ECF_MAY_BE_ALLOCA 8
2375 /* Nonzero if this is a call to a function that won't throw an exception. */
2376 #define ECF_NOTHROW 16
2377 /* Nonzero if this is a call to setjmp or a related function. */
2378 #define ECF_RETURNS_TWICE 32
2379 /* Nonzero if this is a call to `longjmp'. */
2380 #define ECF_LONGJMP 64
2381 /* Nonzero if this is a syscall that makes a new process in the image of
2383 #define ECF_FORK_OR_EXEC 128
2384 #define ECF_SIBCALL 256
2385 /* Nonzero if this is a call to "pure" function (like const function,
2386 but may read memory. */
2387 #define ECF_PURE 512
2388 /* Nonzero if this is a call to a function that returns with the stack
2389 pointer depressed. */
2390 #define ECF_SP_DEPRESSED 1024
2391 /* Nonzero if this call is known to always return. */
2392 #define ECF_ALWAYS_RETURN 2048
2393 /* Create libcall block around the call. */
2394 #define ECF_LIBCALL_BLOCK 4096
2396 extern int flags_from_decl_or_type
PARAMS ((tree
));
2398 #endif /* ! GCC_RTL_H */