1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 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
30 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
31 #undef FLOAT /* Likewise. */
32 #undef ABS /* Likewise. */
33 #undef PC /* Likewise. */
35 /* Value used by some passes to "recognize" noop moves as valid
37 #define NOOP_MOVE_INSN_CODE INT_MAX
39 /* Register Transfer Language EXPRESSIONS CODES */
41 #define RTX_CODE enum rtx_code
44 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
45 #include "rtl.def" /* rtl expressions are documented here */
48 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
50 Assumes default enum value assignment. */
52 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
53 /* The cast here, saves many elsewhere. */
55 extern const unsigned char rtx_length[NUM_RTX_CODE];
56 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
58 extern const char * const rtx_name[NUM_RTX_CODE];
59 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
61 extern const char * const rtx_format[NUM_RTX_CODE];
62 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
64 extern const char rtx_class[NUM_RTX_CODE];
65 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
67 extern const unsigned char rtx_size[NUM_RTX_CODE];
68 extern const unsigned char rtx_next[NUM_RTX_CODE];
70 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
71 relative to which the offsets are calculated, as explained in rtl.def. */
74 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
75 unsigned min_align: 8;
77 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
78 unsigned min_after_vec: 1; /* minimum address target label is
79 after the ADDR_DIFF_VEC. */
80 unsigned max_after_vec: 1; /* maximum address target label is
81 after the ADDR_DIFF_VEC. */
82 unsigned min_after_base: 1; /* minimum address target label is
84 unsigned max_after_base: 1; /* maximum address target label is
86 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
87 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
90 } addr_diff_vec_flags;
92 /* Structure used to describe the attributes of a MEM. These are hashed
93 so MEMs that the same attributes share a data structure. This means
94 they cannot be modified in place. If any element is nonzero, it means
95 the value of the corresponding attribute is unknown. */
96 /* ALIGN and SIZE are the alignment and size of the MEM itself,
97 while EXPR can describe a larger underlying object, which might have a
98 stricter alignment; OFFSET is the offset of the MEM within that object. */
99 typedef struct mem_attrs GTY(())
101 HOST_WIDE_INT alias; /* Memory alias set. */
102 tree expr; /* expr corresponding to MEM. */
103 rtx offset; /* Offset from start of DECL, as CONST_INT. */
104 rtx size; /* Size in bytes, as a CONST_INT. */
105 unsigned int align; /* Alignment of MEM in bits. */
108 /* Structure used to describe the attributes of a REG in similar way as
109 mem_attrs does for MEM above. */
111 typedef struct reg_attrs GTY(())
113 tree decl; /* decl corresponding to REG. */
114 HOST_WIDE_INT offset; /* Offset from start of DECL. */
117 /* Common union for an element of an rtx. */
126 enum machine_mode rttype;
127 addr_diff_vec_flags rt_addr_diff_vec_flags;
128 struct cselib_val_struct *rt_cselib;
129 struct bitmap_head_def *rtbit;
131 struct basic_block_def *bb;
135 typedef union rtunion_def rtunion;
137 /* RTL expression ("rtx"). */
139 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
140 chain_prev ("RTX_PREV (&%h)")))
142 /* The kind of expression this is. */
143 ENUM_BITFIELD(rtx_code) code: 16;
145 /* The kind of value the expression has. */
146 ENUM_BITFIELD(machine_mode) mode : 8;
148 /* 1 in a MEM if we should keep the alias set for this mem unchanged
149 when we access a component.
150 1 in a CALL_INSN if it is a sibling call.
151 1 in a SET that is for a return.
152 In a CODE_LABEL, part of the two-bit alternate entry field. */
153 unsigned int jump : 1;
154 /* In a CODE_LABEL, part of the two-bit alternate entry field.
155 1 in a MEM if it cannot trap. */
156 unsigned int call : 1;
157 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
158 1 in a SUBREG if it references an unsigned object whose mode has been
159 from a promoted to a wider mode.
160 1 in a SYMBOL_REF if it addresses something in the per-function
162 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
163 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
164 unsigned int unchanging : 1;
165 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
166 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
167 if it has been deleted.
168 1 in a REG expression if corresponds to a variable declared by the user,
169 0 for an internally generated temporary.
170 1 in a SUBREG with a negative value.
171 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
172 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
173 unsigned int volatil : 1;
174 /* 1 in a MEM referring to a field of an aggregate.
175 0 if the MEM was a variable or the result of a * operator in C;
176 1 if it was the result of a . or -> operator (on a struct) in C.
177 1 in a REG if the register is used only in exit code a loop.
178 1 in a SUBREG expression if was generated from a variable with a
180 1 in a CODE_LABEL if the label is used for nonlocal gotos
181 and must not be deleted even if its count is zero.
182 1 in a LABEL_REF if this is a reference to a label outside the
184 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
185 together with the preceding insn. Valid only within sched.
186 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
187 from the target of a branch. Valid from reorg until end of compilation;
189 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
190 dead code. Valid only during dead-code elimination phase; cleared
192 unsigned int in_struct : 1;
193 /* At the end of RTL generation, 1 if this rtx is used. This is used for
194 copying shared structure. See `unshare_all_rtl'.
195 In a REG, this is not needed for that purpose, and used instead
196 in `leaf_renumber_regs_insn'.
197 1 in a SYMBOL_REF, means that emit_library_call
198 has used it as the function. */
199 unsigned int used : 1;
200 /* Nonzero if this rtx came from procedure integration.
201 1 in a REG or PARALLEL means this rtx refers to the return value
202 of the current function.
203 1 in a SYMBOL_REF if the symbol is weak. */
204 unsigned integrated : 1;
205 /* 1 in an INSN or a SET if this rtx is related to the call frame,
206 either changing how we compute the frame address or saving and
207 restoring registers in the prologue and epilogue.
208 1 in a MEM if the MEM refers to a scalar, rather than a member of
210 1 in a REG if the register is a pointer.
211 1 in a SYMBOL_REF if it addresses something in the per-function
212 constant string pool. */
213 unsigned frame_related : 1;
215 /* The first element of the operands of this rtx.
216 The number of operands and their types are controlled
217 by the `code' field, according to rtl.def. */
220 HOST_WIDE_INT hwint[1];
221 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
224 /* The size in bytes of an rtx header (code, mode and flags). */
225 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
227 /* The size in bytes of an rtx with code CODE. */
228 #define RTX_SIZE(CODE) rtx_size[CODE]
230 #define NULL_RTX (rtx) 0
232 /* The "next" and "previous" RTX, relative to this one. */
234 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
235 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
237 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
239 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
240 || GET_CODE (X) == CALL_INSN \
241 || GET_CODE (X) == JUMP_INSN \
242 || GET_CODE (X) == NOTE \
243 || GET_CODE (X) == BARRIER \
244 || GET_CODE (X) == CODE_LABEL) \
245 && PREV_INSN (X) != NULL \
246 && NEXT_INSN (PREV_INSN (X)) == X \
247 ? PREV_INSN (X) : NULL)
249 /* Define macros to access the `code' field of the rtx. */
251 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
252 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
254 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
255 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
257 /* RTL vector. These appear inside RTX's when there is a need
258 for a variable number of things. The principle use is inside
259 PARALLEL expressions. */
261 struct rtvec_def GTY(()) {
262 int num_elem; /* number of elements */
263 rtx GTY ((length ("%h.num_elem"))) elem[1];
266 #define NULL_RTVEC (rtvec) 0
268 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
269 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
271 /* Predicate yielding nonzero iff X is an rtl for a register. */
272 #define REG_P(X) (GET_CODE (X) == REG)
274 /* Predicate yielding nonzero iff X is a label insn. */
275 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
277 /* Predicate yielding nonzero iff X is a jump insn. */
278 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
280 /* Predicate yielding nonzero iff X is a note insn. */
281 #define NOTE_P(X) (GET_CODE (X) == NOTE)
283 /* Predicate yielding nonzero iff X is a barrier insn. */
284 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
286 /* Predicate yielding nonzero iff X is a data for a jump table. */
287 #define JUMP_TABLE_DATA_P(INSN) \
288 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
289 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
291 /* 1 if X is a constant value that is an integer. */
293 #define CONSTANT_P(X) \
294 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
295 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
296 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
297 || GET_CODE (X) == CONST_VECTOR \
298 || GET_CODE (X) == CONSTANT_P_RTX)
300 /* General accessor macros for accessing the fields of an rtx. */
302 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
303 /* The bit with a star outside the statement expr and an & inside is
304 so that N can be evaluated only once. */
305 #define RTL_CHECK1(RTX, N, C1) __extension__ \
306 (*({ rtx const _rtx = (RTX); const int _n = (N); \
307 const enum rtx_code _code = GET_CODE (_rtx); \
308 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
309 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
311 if (GET_RTX_FORMAT(_code)[_n] != C1) \
312 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
314 &_rtx->u.fld[_n]; }))
316 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
317 (*({ rtx const _rtx = (RTX); const int _n = (N); \
318 const enum rtx_code _code = GET_CODE (_rtx); \
319 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
320 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
322 if (GET_RTX_FORMAT(_code)[_n] != C1 \
323 && GET_RTX_FORMAT(_code)[_n] != C2) \
324 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
326 &_rtx->u.fld[_n]; }))
328 #define RTL_CHECKC1(RTX, N, C) __extension__ \
329 (*({ rtx const _rtx = (RTX); const int _n = (N); \
330 if (GET_CODE (_rtx) != (C)) \
331 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
333 &_rtx->u.fld[_n]; }))
335 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
336 (*({ rtx const _rtx = (RTX); const int _n = (N); \
337 const enum rtx_code _code = GET_CODE (_rtx); \
338 if (_code != (C1) && _code != (C2)) \
339 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
341 &_rtx->u.fld[_n]; }))
343 #define RTVEC_ELT(RTVEC, I) __extension__ \
344 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
345 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
346 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
348 &_rtvec->elem[_i]; }))
350 #define XWINT(RTX, N) __extension__ \
351 (*({ rtx const _rtx = (RTX); const int _n = (N); \
352 const enum rtx_code _code = GET_CODE (_rtx); \
353 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
354 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
356 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
357 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
359 &_rtx->u.hwint[_n]; }))
361 #define XCWINT(RTX, N, C) __extension__ \
362 (*({ rtx const _rtx = (RTX); \
363 if (GET_CODE (_rtx) != (C)) \
364 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
366 &_rtx->u.hwint[N]; }))
368 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
371 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
374 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
377 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
380 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
381 const char *, int, const char *)
383 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
387 #else /* not ENABLE_RTL_CHECKING */
389 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
390 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
391 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
392 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
393 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
394 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
395 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
399 /* General accessor macros for accessing the flags of an rtx. */
401 /* Access an individual rtx flag, with no checking of any kind. */
402 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
404 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
405 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
406 ({ rtx const _rtx = (RTX); \
407 if (GET_CODE(_rtx) != C1) \
408 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
412 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
413 ({ rtx const _rtx = (RTX); \
414 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
415 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
419 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
420 ({ rtx const _rtx = (RTX); \
421 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
422 && GET_CODE(_rtx) != C3) \
423 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
427 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
428 ({ rtx const _rtx = (RTX); \
429 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
430 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
431 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
435 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
436 ({ rtx const _rtx = (RTX); \
437 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
438 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
439 && GET_CODE(_rtx) != C5) \
440 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
444 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
446 ({ rtx const _rtx = (RTX); \
447 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
448 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
449 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
450 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
454 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
456 ({ rtx const _rtx = (RTX); \
457 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
458 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
459 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
460 && GET_CODE(_rtx) != C7) \
461 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
465 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
467 ({ rtx const _rtx = (RTX); \
468 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
469 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
470 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
471 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
472 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
476 extern void rtl_check_failed_flag (const char *, rtx, const char *,
481 #else /* not ENABLE_RTL_FLAG_CHECKING */
483 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
484 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
485 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
486 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
487 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
488 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
489 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
490 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
493 #define CLEAR_RTX_FLAGS(RTX) \
495 rtx const _rtx = (RTX); \
497 _rtx->frame_related = 0; \
498 _rtx->in_struct = 0; \
499 _rtx->integrated = 0; \
501 _rtx->unchanging = 0; \
506 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
507 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
508 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
509 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
510 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
511 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
512 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
513 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
514 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
516 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
517 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
519 /* These are like XINT, etc. except that they expect a '0' field instead
520 of the normal type code. */
522 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
523 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
524 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
525 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
526 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
527 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
528 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
529 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
530 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
531 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
532 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
533 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
534 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
536 /* Access a '0' field with any type. */
537 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
539 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
540 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
541 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
542 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
543 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
544 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
545 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
546 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
547 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
548 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
549 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
551 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
552 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
554 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
556 /* ACCESS MACROS for particular fields of insns. */
558 /* Determines whether X is an insn. */
559 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i')
561 /* Holds a unique number for each insn.
562 These are not necessarily sequentially increasing. */
563 #define INSN_UID(INSN) XINT (INSN, 0)
565 /* Chain insns together in sequence. */
566 #define PREV_INSN(INSN) XEXP (INSN, 1)
567 #define NEXT_INSN(INSN) XEXP (INSN, 2)
569 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
570 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
571 /* The body of an insn. */
572 #define PATTERN(INSN) XEXP (INSN, 5)
574 /* Code number of instruction, from when it was recognized.
575 -1 means this instruction has not been recognized yet. */
576 #define INSN_CODE(INSN) XINT (INSN, 6)
578 /* Set up in flow.c; empty before then.
579 Holds a chain of INSN_LIST rtx's whose first operands point at
580 previous insns with direct data-flow connections to this one.
581 That means that those insns set variables whose next use is in this insn.
582 They are always in the same basic block as this insn. */
583 #define LOG_LINKS(INSN) XEXP(INSN, 7)
585 #define RTX_INTEGRATED_P(RTX) \
586 (RTL_FLAG_CHECK8("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \
587 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \
589 #define RTX_UNCHANGING_P(RTX) \
590 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
591 #define RTX_FRAME_RELATED_P(RTX) \
592 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
593 JUMP_INSN, BARRIER, SET)->frame_related)
595 /* 1 if RTX is an insn that has been deleted. */
596 #define INSN_DELETED_P(RTX) \
597 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
598 CODE_LABEL, BARRIER, NOTE)->volatil)
600 /* 1 if RTX is a call to a const or pure function. */
601 #define CONST_OR_PURE_CALL_P(RTX) \
602 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
603 EXPR_LIST)->unchanging)
605 /* 1 if RTX is a call_insn for a sibling call. */
606 #define SIBLING_CALL_P(RTX) \
607 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
609 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
610 #define INSN_ANNULLED_BRANCH_P(RTX) \
611 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
613 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
614 elimination phase. */
615 #define INSN_DEAD_CODE_P(RTX) \
616 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
618 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
619 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
620 executed if the branch is taken. For annulled branches with this bit
621 clear, the insn should be executed only if the branch is not taken. */
622 #define INSN_FROM_TARGET_P(RTX) \
623 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
625 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
627 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
629 /* Holds a list of notes on what this insn does to various REGs.
630 It is a chain of EXPR_LIST rtx's, where the second operand is the
631 chain pointer and the first operand is the REG being described.
632 The mode field of the EXPR_LIST contains not a real machine mode
633 but a value from enum reg_note. */
635 #define REG_NOTES(INSN) XEXP(INSN, 8)
637 /* Don't forget to change reg_note_name in rtl.c. */
640 /* The value in REG dies in this insn (i.e., it is not needed past
641 this insn). If REG is set in this insn, the REG_DEAD note may,
642 but need not, be omitted. */
645 /* The REG is autoincremented or autodecremented. */
648 /* Describes the insn as a whole; it says that the insn sets a register
649 to a constant value or to be equivalent to a memory address. If the
650 register is spilled to the stack then the constant value should be
651 substituted for it. The contents of the REG_EQUIV is the constant
652 value or memory address, which may be different from the source of
653 the SET although it has the same value. A REG_EQUIV note may also
654 appear on an insn which copies a register parameter to a pseudo-register,
655 if there is a memory address which could be used to hold that
656 pseudo-register throughout the function. */
659 /* Like REG_EQUIV except that the destination is only momentarily equal
660 to the specified rtx. Therefore, it cannot be used for substitution;
661 but it can be used for cse. */
664 /* This insn copies the return-value of a library call out of the hard reg
665 for return values. This note is actually an INSN_LIST and it points to
666 the first insn involved in setting up arguments for the call. flow.c
667 uses this to delete the entire library call when its result is dead. */
670 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
671 and points at the one that has the REG_RETVAL. This note is also an
675 /* The register is always nonnegative during the containing loop. This is
676 used in branches so that decrement and branch instructions terminating
677 on zero can be matched. There must be an insn pattern in the md file
678 named `decrement_and_branch_until_zero' or else this will never be added
679 to any instructions. */
682 /* There is no conflict *after this insn* between the register in the note
683 and the destination of this insn. */
686 /* Identifies a register set in this insn and never used. */
689 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
690 respectively. Normally, these are required to be consecutive insns, but
691 we permit putting a cc0-setting insn in the delay slot of a branch as
692 long as only one copy of the insn exists. In that case, these notes
693 point from one to the other to allow code generation to determine what
694 any require information and to properly update CC_STATUS. These notes
696 REG_CC_SETTER, REG_CC_USER,
698 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
699 CODE_LABEL contained in the REG_LABEL note is used by the insn.
700 This note is an INSN_LIST. */
703 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
704 write-after-read and write-after-write dependencies respectively.
705 Data dependencies, which are the only type of LOG_LINK created by
706 flow, are represented by a 0 reg note kind. */
707 REG_DEP_ANTI, REG_DEP_OUTPUT,
709 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
710 It has an integer value. For jumps, it is the probability that this is a
711 taken branch. For calls, it is the probability that this call won't
715 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn
716 before that the code to profile the value is inserted. It contains
717 the results of profiling. */
720 /* Attached to a call insn; indicates that the call is malloc-like and
721 that the pointer returned cannot alias anything else. */
724 /* Used to optimize rtl generated by dynamic stack allocations for targets
725 where SETJMP_VIA_SAVE_AREA is true. */
728 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
729 CONCAT of two integer value. First specifies the branch predictor
730 that added the note, second specifies the predicted hitrate of branch
731 in the same format as REG_BR_PROB note uses. */
734 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
735 for DWARF to interpret what they imply. The attached rtx is used
736 instead of intuition. */
737 REG_FRAME_RELATED_EXPR,
739 /* Indicates that REG holds the exception context for the function.
740 This context is shared by inline functions, so the code to acquire
741 the real exception context is delayed until after inlining. */
744 /* Indicates what exception region an INSN belongs in. This is used to
745 indicate what region to which a call may throw. REGION 0 indicates
746 that a call cannot throw at all. REGION -1 indicates that it cannot
747 throw, nor will it execute a non-local goto. */
750 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
753 /* Indicates that this insn (which is part of the prologue) computes
754 a value which might not be used later, and if so it's OK to delete
755 the insn. Normally, deleting any insn in the prologue is an error.
756 At present the parameter is unused and set to (const_int 0). */
759 /* Indicates that a call does not return. */
762 /* Indicates that an indirect jump is a non-local goto instead of a
766 /* This kind of note is generated at each to `setjmp',
767 and similar functions that can return twice. */
770 /* Indicate calls that always returns. */
773 /* Indicate that the memory load references a vtable. The expression
774 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
778 /* The base value for branch probability notes. */
779 #define REG_BR_PROB_BASE 10000
781 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
782 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
783 #define PUT_REG_NOTE_KIND(LINK, KIND) \
784 PUT_MODE (LINK, (enum machine_mode) (KIND))
786 /* Names for REG_NOTE's in EXPR_LIST insn's. */
788 extern const char * const reg_note_name[];
789 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
791 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
792 USE and CLOBBER expressions.
793 USE expressions list the registers filled with arguments that
794 are passed to the function.
795 CLOBBER expressions document the registers explicitly clobbered
797 Pseudo registers can not be mentioned in this list. */
798 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
800 /* The label-number of a code-label. The assembler label
801 is made from `L' and the label-number printed in decimal.
802 Label numbers are unique in a compilation. */
803 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
805 #define LINE_NUMBER NOTE
807 /* In a NOTE that is a line number, this is a string for the file name that the
808 line is in. We use the same field to record block numbers temporarily in
809 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
810 between ints and pointers if we use a different macro for the block number.)
814 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
815 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
816 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
817 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
818 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
819 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
820 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
821 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
823 /* In a NOTE that is a line number, this is the line number.
824 Other kinds of NOTEs are identified by negative numbers here. */
825 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
827 /* Nonzero if INSN is a note marking the beginning of a basic block. */
828 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
829 (GET_CODE (INSN) == NOTE \
830 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
832 /* Algorithm and flags for prediction. */
833 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
834 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
835 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
837 /* Codes that appear in the NOTE_LINE_NUMBER field
838 for kinds of notes that are not line numbers.
840 Notice that we do not try to use zero here for any of
841 the special note codes because sometimes the source line
842 actually can be zero! This happens (for example) when we
843 are generating code for the per-translation-unit constructor
844 and destructor routines for some C++ translation unit.
846 If you should change any of the following values, or if you
847 should add a new value here, don't forget to change the
848 note_insn_name array in rtl.c. */
852 /* Keep all of these numbers negative. Adjust as needed. */
853 NOTE_INSN_BIAS = -100,
855 /* This note is used to get rid of an insn
856 when it isn't safe to patch the insn out of the chain. */
859 /* These are used to mark the beginning and end of a lexical block.
860 See NOTE_BLOCK, identify_blocks and reorder_blocks. */
864 /* These mark the extremes of a loop. */
868 /* Generated at the place in a loop that `continue' jumps to. */
870 /* Generated at the start of a duplicated exit test. */
873 /* Generated at the end of a conditional at the top of the loop.
874 This is used to perform a lame form of loop rotation in lieu
875 of actually understanding the loop structure. The note is
876 discarded after rotation is complete. */
877 NOTE_INSN_LOOP_END_TOP_COND,
879 /* This kind of note is generated at the end of the function body,
880 just before the return insn or return label. In an optimizing
881 compilation it is deleted by the first jump optimization, after
882 enabling that optimizer to determine whether control can fall
883 off the end of the function body without a return statement. */
884 NOTE_INSN_FUNCTION_END,
886 /* This marks the point immediately after the last prologue insn. */
887 NOTE_INSN_PROLOGUE_END,
889 /* This marks the point immediately prior to the first epilogue insn. */
890 NOTE_INSN_EPILOGUE_BEG,
892 /* Generated in place of user-declared labels when they are deleted. */
893 NOTE_INSN_DELETED_LABEL,
895 /* This note indicates the start of the real body of the function,
896 i.e. the point just after all of the parms have been moved into
898 NOTE_INSN_FUNCTION_BEG,
900 /* These note where exception handling regions begin and end.
901 Uses NOTE_EH_HANDLER to identify the region in question. */
902 NOTE_INSN_EH_REGION_BEG,
903 NOTE_INSN_EH_REGION_END,
905 /* Generated whenever a duplicate line number note is output. For example,
906 one is output after the end of an inline function, in order to prevent
907 the line containing the inline call from being counted twice in gcov. */
908 NOTE_INSN_REPEATED_LINE_NUMBER,
910 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
911 NOTE_INSN_BASIC_BLOCK,
913 /* Record the expected value of a register at a location. Uses
914 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
915 NOTE_INSN_EXPECTED_VALUE,
917 /* Record a prediction. Uses NOTE_PREDICTION. */
918 NOTE_INSN_PREDICTION,
923 /* Names for NOTE insn's other than line numbers. */
925 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
926 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
927 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
929 /* The name of a label, in case it corresponds to an explicit label
930 in the input source code. */
931 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
933 /* In jump.c, each label contains a count of the number
934 of LABEL_REFs that point at it, so unused labels can be deleted. */
935 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
937 /* Labels carry a two-bit field composed of the ->jump and ->call
938 bits. This field indicates whether the label is an alternate
939 entry point, and if so, what kind. */
942 LABEL_NORMAL = 0, /* ordinary label */
943 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
944 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
945 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
948 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
950 /* Retrieve the kind of LABEL. */
951 #define LABEL_KIND(LABEL) __extension__ \
952 ({ rtx const _label = (LABEL); \
953 if (GET_CODE (_label) != CODE_LABEL) \
954 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
956 (enum label_kind) ((_label->jump << 1) | _label->call); })
958 /* Set the kind of LABEL. */
959 #define SET_LABEL_KIND(LABEL, KIND) do { \
960 rtx _label = (LABEL); \
961 unsigned int _kind = (KIND); \
962 if (GET_CODE (_label) != CODE_LABEL) \
963 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
965 _label->jump = ((_kind >> 1) & 1); \
966 _label->call = (_kind & 1); \
971 /* Retrieve the kind of LABEL. */
972 #define LABEL_KIND(LABEL) \
973 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
975 /* Set the kind of LABEL. */
976 #define SET_LABEL_KIND(LABEL, KIND) do { \
977 rtx _label = (LABEL); \
978 unsigned int _kind = (KIND); \
979 _label->jump = ((_kind >> 1) & 1); \
980 _label->call = (_kind & 1); \
983 #endif /* rtl flag checking */
985 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
987 /* The original regno this ADDRESSOF was built for. */
988 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
990 /* The variable in the register we took the address of. */
991 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
993 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
994 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
995 be decremented and possibly the label can be deleted. */
996 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
998 /* Once basic blocks are found in flow.c,
999 each CODE_LABEL starts a chain that goes through
1000 all the LABEL_REFs that jump to that label.
1001 The chain eventually winds up at the CODE_LABEL: it is circular. */
1002 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1004 /* This is the field in the LABEL_REF through which the circular chain
1005 of references to a particular label is linked.
1006 This chain is set up in flow.c. */
1008 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
1010 /* Once basic blocks are found in flow.c,
1011 Each LABEL_REF points to its containing instruction with this field. */
1013 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
1015 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
1016 the number the register originally had; for a pseudo register turned into
1017 a hard reg this will hold the old pseudo register number. */
1019 #define REGNO(RTX) XCUINT (RTX, 0, REG)
1020 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1022 /* 1 if RTX is a reg or parallel that is the current function's return
1024 #define REG_FUNCTION_VALUE_P(RTX) \
1025 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated)
1027 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1028 #define REG_USERVAR_P(RTX) \
1029 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1031 /* 1 if RTX is a reg that holds a pointer value. */
1032 #define REG_POINTER(RTX) \
1033 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1035 /* 1 if the given register REG corresponds to a hard register. */
1036 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1038 /* 1 if the given register number REG_NO corresponds to a hard register. */
1039 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1041 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1043 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1045 /* For a CONST_DOUBLE:
1046 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1047 low-order word and ..._HIGH the high-order.
1048 For a float, there is a REAL_VALUE_TYPE structure, and
1049 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1050 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1051 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1052 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1054 /* For a CONST_VECTOR, return element #n. */
1055 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1057 /* For a CONST_VECTOR, return the number of elements in a vector. */
1058 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1060 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1061 SUBREG_BYTE extracts the byte-number. */
1063 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1064 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1067 extern unsigned int subreg_lsb (rtx);
1068 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1069 unsigned int, enum machine_mode);
1070 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1071 unsigned int, enum machine_mode);
1072 extern unsigned int subreg_regno (rtx);
1074 /* 1 if RTX is a subreg containing a reg that is already known to be
1075 sign- or zero-extended from the mode of the subreg to the mode of
1076 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1079 When used as a LHS, is means that this extension must be done
1080 when assigning to SUBREG_REG. */
1082 #define SUBREG_PROMOTED_VAR_P(RTX) \
1083 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1085 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1087 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1089 _rtx->volatil = 1; \
1091 _rtx->volatil = 0; \
1092 _rtx->unchanging = (VAL); \
1095 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1096 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1097 ? -1 : (RTX)->unchanging)
1099 /* Access various components of an ASM_OPERANDS rtx. */
1101 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1102 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1103 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1104 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1105 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1106 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1107 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1108 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1109 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1110 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1111 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1112 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1113 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1114 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1115 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1117 /* 1 if RTX is a mem and we should keep the alias set for this mem
1118 unchanged when we access a component. Set to 1, or example, when we
1119 are already in a non-addressable component of an aggregate. */
1120 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1121 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1123 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1124 #define MEM_VOLATILE_P(RTX) \
1125 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1126 ASM_INPUT)->volatil)
1128 /* 1 if RTX is a mem that refers to an aggregate, either to the
1129 aggregate itself of to a field of the aggregate. If zero, RTX may
1130 or may not be such a reference. */
1131 #define MEM_IN_STRUCT_P(RTX) \
1132 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1134 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may
1135 not refer to a scalar. */
1136 #define MEM_SCALAR_P(RTX) \
1137 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related)
1139 /* 1 if RTX is a mem that cannot trap. */
1140 #define MEM_NOTRAP_P(RTX) \
1141 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1143 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1144 RTX. Otherwise, vice versa. Use this macro only when you are
1145 *sure* that you know that the MEM is in a structure, or is a
1146 scalar. VAL is evaluated only once. */
1147 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1151 MEM_IN_STRUCT_P (RTX) = 1; \
1152 MEM_SCALAR_P (RTX) = 0; \
1156 MEM_IN_STRUCT_P (RTX) = 0; \
1157 MEM_SCALAR_P (RTX) = 1; \
1161 /* The memory attribute block. We provide access macros for each value
1162 in the block and provide defaults if none specified. */
1163 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1165 /* The register attribute block. We provide access macros for each value
1166 in the block and provide defaults if none specified. */
1167 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1169 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1170 set, and may alias anything. Otherwise, the MEM can only alias
1171 MEMs in a conflicting alias set. This value is set in a
1172 language-dependent manner in the front-end, and should not be
1173 altered in the back-end. These set numbers are tested with
1174 alias_sets_conflict_p. */
1175 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1177 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1178 refer to part of a DECL. It may also be a COMPONENT_REF. */
1179 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1181 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1182 RTX that is always a CONST_INT. */
1183 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1185 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1186 is always a CONST_INT. */
1187 #define MEM_SIZE(RTX) \
1188 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1189 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1192 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1193 mode as a default when STRICT_ALIGNMENT, but not if not. */
1194 #define MEM_ALIGN(RTX) \
1195 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1196 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1197 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1199 /* For a REG rtx, the decl it is known to refer to, if it is known to
1200 refer to part of a DECL. */
1201 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1203 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1204 RTX that is always a CONST_INT. */
1205 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1207 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1208 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1209 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1210 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1211 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1212 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1213 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1214 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1215 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1217 /* 1 if RTX is a label_ref to a label outside the loop containing the
1219 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1220 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1222 /* 1 if RTX is a label_ref for a nonlocal label. */
1223 /* Likewise in an expr_list for a reg_label note. */
1224 #define LABEL_REF_NONLOCAL_P(RTX) \
1225 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1226 REG_LABEL)->volatil)
1228 /* 1 if RTX is a code_label that should always be considered to be needed. */
1229 #define LABEL_PRESERVE_P(RTX) \
1230 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1232 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1233 #define REG_LOOP_TEST_P(RTX) \
1234 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1236 /* During sched, 1 if RTX is an insn that must be scheduled together
1237 with the preceding insn. */
1238 #define SCHED_GROUP_P(RTX) \
1239 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1242 /* For a SET rtx, SET_DEST is the place that is set
1243 and SET_SRC is the value it is set to. */
1244 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1245 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1246 #define SET_IS_RETURN_P(RTX) \
1247 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1249 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1250 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1251 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1253 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1254 conditionally executing the code on, COND_EXEC_CODE is the code
1255 to execute if the condition is true. */
1256 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1257 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1259 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1261 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1262 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1264 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1265 tree constant pool. This information is private to varasm.c. */
1266 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1267 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1268 (RTX), SYMBOL_REF)->frame_related)
1270 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1271 #define SYMBOL_REF_FLAG(RTX) \
1272 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1274 /* 1 if RTX is a symbol_ref that has been the library function in
1275 emit_library_call. */
1276 #define SYMBOL_REF_USED(RTX) \
1277 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1279 /* 1 if RTX is a symbol_ref for a weak symbol. */
1280 #define SYMBOL_REF_WEAK(RTX) \
1281 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated)
1283 /* The tree (decl or constant) associated with the symbol, or null. */
1284 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1286 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1287 information derivable from the tree decl associated with this symbol.
1288 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1289 decl. In some cases this is a bug. But beyond that, it's nice to cache
1290 this information to avoid recomputing it. Finally, this allows space for
1291 the target to store more than one bit of information, as with
1293 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1295 /* These flags are common enough to be defined for all targets. They
1296 are computed by the default version of targetm.encode_section_info. */
1298 /* Set if this symbol is a function. */
1299 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1300 #define SYMBOL_REF_FUNCTION_P(RTX) \
1301 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1302 /* Set if targetm.binds_local_p is true. */
1303 #define SYMBOL_FLAG_LOCAL (1 << 1)
1304 #define SYMBOL_REF_LOCAL_P(RTX) \
1305 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1306 /* Set if targetm.in_small_data_p is true. */
1307 #define SYMBOL_FLAG_SMALL (1 << 2)
1308 #define SYMBOL_REF_SMALL_P(RTX) \
1309 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1310 /* The three-bit field at [5:3] is true for TLS variables; use
1311 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1312 #define SYMBOL_FLAG_TLS_SHIFT 3
1313 #define SYMBOL_REF_TLS_MODEL(RTX) \
1314 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1315 /* Set if this symbol is not defined in this translation unit. */
1316 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1317 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1318 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1320 /* Subsequent bits are available for the target to use. */
1321 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1322 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1324 /* Define a macro to look for REG_INC notes,
1325 but save time on machines where they never exist. */
1327 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1328 #define FIND_REG_INC_NOTE(INSN, REG) \
1329 ((REG) != NULL_RTX && REG_P ((REG)) \
1330 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1331 : find_reg_note ((INSN), REG_INC, (REG)))
1333 #define FIND_REG_INC_NOTE(INSN, REG) 0
1336 /* Indicate whether the machine has any sort of auto increment addressing.
1337 If not, we can avoid checking for REG_INC notes. */
1339 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1340 #define AUTO_INC_DEC
1343 #ifndef HAVE_PRE_INCREMENT
1344 #define HAVE_PRE_INCREMENT 0
1347 #ifndef HAVE_PRE_DECREMENT
1348 #define HAVE_PRE_DECREMENT 0
1351 #ifndef HAVE_POST_INCREMENT
1352 #define HAVE_POST_INCREMENT 0
1355 #ifndef HAVE_POST_DECREMENT
1356 #define HAVE_POST_DECREMENT 0
1359 #ifndef HAVE_POST_MODIFY_DISP
1360 #define HAVE_POST_MODIFY_DISP 0
1363 #ifndef HAVE_POST_MODIFY_REG
1364 #define HAVE_POST_MODIFY_REG 0
1367 #ifndef HAVE_PRE_MODIFY_DISP
1368 #define HAVE_PRE_MODIFY_DISP 0
1371 #ifndef HAVE_PRE_MODIFY_REG
1372 #define HAVE_PRE_MODIFY_REG 0
1376 /* Some architectures do not have complete pre/post increment/decrement
1377 instruction sets, or only move some modes efficiently. These macros
1378 allow us to tune autoincrement generation. */
1380 #ifndef USE_LOAD_POST_INCREMENT
1381 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1384 #ifndef USE_LOAD_POST_DECREMENT
1385 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1388 #ifndef USE_LOAD_PRE_INCREMENT
1389 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1392 #ifndef USE_LOAD_PRE_DECREMENT
1393 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1396 #ifndef USE_STORE_POST_INCREMENT
1397 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1400 #ifndef USE_STORE_POST_DECREMENT
1401 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1404 #ifndef USE_STORE_PRE_INCREMENT
1405 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1408 #ifndef USE_STORE_PRE_DECREMENT
1409 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1412 /* Determine if the insn is a PHI node. */
1413 #define PHI_NODE_P(X) \
1414 ((X) && GET_CODE (X) == INSN \
1415 && GET_CODE (PATTERN (X)) == SET \
1416 && GET_CODE (SET_SRC (PATTERN (X))) == PHI)
1418 /* Nonzero if we need to distinguish between the return value of this function
1419 and the return value of a function called by this function. This helps
1421 This is 1 until after the rtl generation pass. */
1422 extern int rtx_equal_function_value_matters;
1424 /* Nonzero when we are generating CONCATs. */
1425 extern int generating_concat_p;
1427 /* Generally useful functions. */
1430 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1432 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1435 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1436 extern void purge_builtin_constant_p (void);
1439 extern void set_stack_check_libfunc (rtx);
1440 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1441 extern rtx plus_constant_wide (rtx, HOST_WIDE_INT);
1442 extern rtx plus_constant_for_output_wide (rtx, HOST_WIDE_INT);
1443 extern void optimize_save_area_alloca (rtx);
1446 extern rtx gen_rtx (enum rtx_code, enum machine_mode, ...);
1447 extern rtvec gen_rtvec (int, ...);
1448 extern rtx copy_insn_1 (rtx);
1449 extern rtx copy_insn (rtx);
1450 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1451 extern rtx emit_copy_of_insn_after (rtx, rtx);
1452 extern void set_reg_attrs_from_mem (rtx, rtx);
1453 extern void set_mem_attrs_from_reg (rtx, rtx);
1454 extern void set_reg_attrs_for_parm (rtx, rtx);
1455 extern int mem_expr_equal_p (tree, tree);
1458 extern rtx rtx_alloc (RTX_CODE);
1459 extern rtvec rtvec_alloc (int);
1460 extern rtx copy_rtx (rtx);
1461 extern void dump_rtx_statistics (void);
1464 extern rtx copy_rtx_if_shared (rtx);
1467 extern rtx copy_most_rtx (rtx, rtx);
1468 extern rtx shallow_copy_rtx (rtx);
1469 extern int rtx_equal_p (rtx, rtx);
1472 extern rtvec gen_rtvec_v (int, rtx *);
1473 extern rtx gen_reg_rtx (enum machine_mode);
1474 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1475 extern rtx gen_label_rtx (void);
1476 extern int subreg_hard_regno (rtx, int);
1477 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1478 extern rtx gen_lowpart (enum machine_mode, rtx);
1481 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1484 extern rtx gen_highpart (enum machine_mode, rtx);
1485 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1486 extern rtx gen_realpart (enum machine_mode, rtx);
1487 extern rtx gen_imagpart (enum machine_mode, rtx);
1488 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1491 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1492 extern int subreg_lowpart_p (rtx);
1493 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1495 extern unsigned int subreg_highpart_offset (enum machine_mode,
1497 extern rtx make_safe_from (rtx, rtx);
1498 extern rtx convert_memory_address (enum machine_mode, rtx);
1499 extern rtx get_insns (void);
1500 extern const char *get_insn_name (int);
1501 extern rtx get_last_insn (void);
1502 extern rtx get_last_insn_anywhere (void);
1503 extern rtx get_first_nonnote_insn (void);
1504 extern rtx get_last_nonnote_insn (void);
1505 extern void start_sequence (void);
1506 extern void push_to_sequence (rtx);
1507 extern void end_sequence (void);
1508 extern void push_to_full_sequence (rtx, rtx);
1509 extern void end_full_sequence (rtx*, rtx*);
1510 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1514 extern rtx force_const_mem (enum machine_mode, rtx);
1517 extern rtx get_pool_constant (rtx);
1518 extern rtx get_pool_constant_mark (rtx, bool *);
1519 extern enum machine_mode get_pool_mode (rtx);
1520 extern rtx get_pool_constant_for_function (struct function *, rtx);
1521 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1522 extern int get_pool_offset (rtx);
1523 extern rtx simplify_subtraction (rtx);
1526 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1527 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1528 extern rtx assign_stack_temp_for_type (enum machine_mode,
1529 HOST_WIDE_INT, int, tree);
1530 extern rtx assign_temp (tree, int, int, int);
1533 extern rtx emit_insn_before (rtx, rtx);
1534 extern rtx emit_insn_before_noloc (rtx, rtx);
1535 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1536 extern rtx emit_jump_insn_before (rtx, rtx);
1537 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1538 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1539 extern rtx emit_call_insn_before (rtx, rtx);
1540 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1541 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1542 extern rtx emit_barrier_before (rtx);
1543 extern rtx emit_label_before (rtx, rtx);
1544 extern rtx emit_note_before (int, rtx);
1545 extern rtx emit_insn_after (rtx, rtx);
1546 extern rtx emit_insn_after_noloc (rtx, rtx);
1547 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1548 extern rtx emit_jump_insn_after (rtx, rtx);
1549 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1550 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1551 extern rtx emit_call_insn_after (rtx, rtx);
1552 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1553 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1554 extern rtx emit_barrier_after (rtx);
1555 extern rtx emit_label_after (rtx, rtx);
1556 extern rtx emit_note_after (int, rtx);
1557 extern rtx emit_note_copy_after (rtx, rtx);
1558 extern rtx emit_insn (rtx);
1559 extern rtx emit_jump_insn (rtx);
1560 extern rtx emit_call_insn (rtx);
1561 extern rtx emit_label (rtx);
1562 extern rtx emit_barrier (void);
1563 extern rtx emit_note (int);
1564 extern rtx emit_note_copy (rtx);
1565 extern rtx emit_line_note (location_t);
1566 extern rtx make_insn_raw (rtx);
1567 extern void add_function_usage_to (rtx, rtx);
1568 extern rtx last_call_insn (void);
1569 extern rtx previous_insn (rtx);
1570 extern rtx next_insn (rtx);
1571 extern rtx prev_nonnote_insn (rtx);
1572 extern rtx next_nonnote_insn (rtx);
1573 extern rtx prev_real_insn (rtx);
1574 extern rtx next_real_insn (rtx);
1575 extern rtx prev_active_insn (rtx);
1576 extern rtx next_active_insn (rtx);
1577 extern int active_insn_p (rtx);
1578 extern rtx prev_label (rtx);
1579 extern rtx next_label (rtx);
1580 extern rtx next_cc0_user (rtx);
1581 extern rtx prev_cc0_setter (rtx);
1583 /* In cfglayout.c */
1584 extern tree choose_inner_scope (tree, tree);
1585 extern int insn_line (rtx);
1586 extern const char * insn_file (rtx);
1587 extern int locator_line (int);
1588 extern const char * locator_file (int);
1589 extern int prologue_locator, epilogue_locator;
1592 extern enum rtx_code reverse_condition (enum rtx_code);
1593 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1594 extern enum rtx_code swap_condition (enum rtx_code);
1595 extern enum rtx_code unsigned_condition (enum rtx_code);
1596 extern enum rtx_code signed_condition (enum rtx_code);
1597 extern void mark_jump_label (rtx, rtx, int);
1598 extern void cleanup_barriers (void);
1601 extern bool squeeze_notes (rtx *, rtx *);
1602 extern rtx delete_related_insns (rtx);
1603 extern void delete_jump (rtx);
1604 extern void delete_barrier (rtx);
1605 extern rtx get_label_before (rtx);
1606 extern rtx get_label_after (rtx);
1607 extern rtx follow_jumps (rtx);
1610 extern rtx *find_constant_term_loc (rtx *);
1613 extern rtx try_split (rtx, rtx, int);
1614 extern int split_branch_probability;
1616 /* In unknown file */
1617 extern rtx split_insns (rtx, rtx);
1619 /* In simplify-rtx.c */
1620 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1622 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1624 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1625 enum machine_mode, rtx, rtx, rtx);
1626 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1628 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1629 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1631 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1632 enum machine_mode, rtx, rtx, rtx);
1633 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1634 enum machine_mode, rtx, rtx);
1635 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1637 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1639 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1640 extern rtx simplify_rtx (rtx);
1641 extern rtx avoid_constant_pool_reference (rtx);
1642 extern bool constant_pool_reference_p (rtx);
1645 extern rtx gen_mem_addressof (rtx, tree, int);
1648 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1652 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1654 /* Functions in rtlanal.c */
1656 /* Single set is implemented as macro for performance reasons. */
1657 #define single_set(I) (INSN_P (I) \
1658 ? (GET_CODE (PATTERN (I)) == SET \
1659 ? PATTERN (I) : single_set_1 (I)) \
1661 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1663 /* Structure used for passing data to REPLACE_LABEL. */
1664 typedef struct replace_label_data
1668 bool update_label_nuses;
1669 } replace_label_data;
1671 extern int rtx_addr_can_trap_p (rtx);
1672 extern bool nonzero_address_p (rtx);
1673 extern int rtx_unstable_p (rtx);
1674 extern int rtx_varies_p (rtx, int);
1675 extern int rtx_addr_varies_p (rtx, int);
1676 extern HOST_WIDE_INT get_integer_term (rtx);
1677 extern rtx get_related_value (rtx);
1678 extern rtx get_jump_table_offset (rtx, rtx *);
1679 extern int global_reg_mentioned_p (rtx);
1680 extern int reg_mentioned_p (rtx, rtx);
1681 extern int count_occurrences (rtx, rtx, int);
1682 extern int reg_referenced_p (rtx, rtx);
1683 extern int reg_used_between_p (rtx, rtx, rtx);
1684 extern int reg_referenced_between_p (rtx, rtx, rtx);
1685 extern int reg_set_between_p (rtx, rtx, rtx);
1686 extern int regs_set_between_p (rtx, rtx, rtx);
1687 extern int commutative_operand_precedence (rtx);
1688 extern int swap_commutative_operands_p (rtx, rtx);
1689 extern int modified_between_p (rtx, rtx, rtx);
1690 extern int no_labels_between_p (rtx, rtx);
1691 extern int no_jumps_between_p (rtx, rtx);
1692 extern int modified_in_p (rtx, rtx);
1693 extern int insn_dependent_p (rtx, rtx);
1694 extern int reg_set_p (rtx, rtx);
1695 extern rtx single_set_2 (rtx, rtx);
1696 extern int multiple_sets (rtx);
1697 extern int set_noop_p (rtx);
1698 extern int noop_move_p (rtx);
1699 extern rtx find_last_value (rtx, rtx *, rtx, int);
1700 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1701 extern int reg_overlap_mentioned_p (rtx, rtx);
1702 extern rtx set_of (rtx, rtx);
1703 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1704 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1705 extern rtx reg_set_last (rtx, rtx);
1706 extern int dead_or_set_p (rtx, rtx);
1707 extern int dead_or_set_regno_p (rtx, unsigned int);
1708 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1709 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1710 extern rtx find_reg_equal_equiv_note (rtx);
1711 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1712 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1713 extern int pure_call_p (rtx);
1714 extern void remove_note (rtx, rtx);
1715 extern int side_effects_p (rtx);
1716 extern int volatile_refs_p (rtx);
1717 extern int volatile_insn_p (rtx);
1718 extern int may_trap_p (rtx);
1719 extern int inequality_comparisons_p (rtx);
1720 extern rtx replace_rtx (rtx, rtx, rtx);
1721 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1722 extern int replace_label (rtx *, void *);
1723 extern int rtx_referenced_p (rtx, rtx);
1724 extern bool tablejump_p (rtx, rtx *, rtx *);
1725 extern int computed_jump_p (rtx);
1726 typedef int (*rtx_function) (rtx *, void *);
1727 extern int for_each_rtx (rtx *, rtx_function, void *);
1728 extern rtx regno_use_in (unsigned int, rtx);
1729 extern int auto_inc_p (rtx);
1730 extern int in_expr_list_p (rtx, rtx);
1731 extern void remove_node_from_expr_list (rtx, rtx *);
1732 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1733 extern int loc_mentioned_in_p (rtx *, rtx);
1734 extern rtx find_first_parameter_load (rtx, rtx);
1735 extern bool keep_with_call_p (rtx);
1736 extern bool label_is_jump_target_p (rtx, rtx);
1740 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1744 void free_EXPR_LIST_list (rtx *);
1745 void free_INSN_LIST_list (rtx *);
1746 void free_EXPR_LIST_node (rtx);
1747 void free_INSN_LIST_node (rtx);
1748 rtx alloc_INSN_LIST (rtx, rtx);
1749 rtx alloc_EXPR_LIST (int, rtx, rtx);
1753 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1754 Always at least 3, since the combiner could put that many together
1755 and we want this to remain correct for all the remaining passes. */
1757 extern int max_parallel;
1759 /* Free up register info memory. */
1760 extern void free_reg_info (void);
1763 extern int asm_noperands (rtx);
1764 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1765 enum machine_mode *);
1767 extern enum reg_class reg_preferred_class (int);
1768 extern enum reg_class reg_alternate_class (int);
1770 extern rtx get_first_nonparm_insn (void);
1772 extern void split_all_insns (int);
1773 extern void split_all_insns_noflow (void);
1775 #define MAX_SAVED_CONST_INT 64
1776 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1778 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1779 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1780 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1781 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1782 extern GTY(()) rtx const_true_rtx;
1784 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1786 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1787 same as VOIDmode. */
1789 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1791 /* Likewise, for the constants 1 and 2. */
1793 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1794 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1796 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1797 is used to represent the frame pointer. This is because the
1798 hard frame pointer and the automatic variables are separated by an amount
1799 that cannot be determined until after register allocation. We can assume
1800 that in this case ELIMINABLE_REGS will be defined, one action of which
1801 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1802 #ifndef HARD_FRAME_POINTER_REGNUM
1803 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1806 /* Index labels for global_rtl. */
1807 enum global_rtl_index
1813 /* For register elimination to work properly these hard_frame_pointer_rtx,
1814 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1815 the same register. */
1816 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1817 GR_ARG_POINTER = GR_FRAME_POINTER,
1819 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1820 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1822 GR_HARD_FRAME_POINTER,
1824 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1825 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1826 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1831 GR_VIRTUAL_INCOMING_ARGS,
1832 GR_VIRTUAL_STACK_ARGS,
1833 GR_VIRTUAL_STACK_DYNAMIC,
1834 GR_VIRTUAL_OUTGOING_ARGS,
1840 /* Pointers to standard pieces of rtx are stored here. */
1841 extern GTY(()) rtx global_rtl[GR_MAX];
1843 /* Standard pieces of rtx, to be substituted directly into things. */
1844 #define pc_rtx (global_rtl[GR_PC])
1845 #define cc0_rtx (global_rtl[GR_CC0])
1847 /* All references to certain hard regs, except those created
1848 by allocating pseudo regs into them (when that's possible),
1849 go through these unique rtx objects. */
1850 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1851 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1852 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1853 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1855 extern GTY(()) rtx pic_offset_table_rtx;
1856 extern GTY(()) rtx static_chain_rtx;
1857 extern GTY(()) rtx static_chain_incoming_rtx;
1858 extern GTY(()) rtx return_address_pointer_rtx;
1860 /* Include the RTL generation functions. */
1866 /* There are some RTL codes that require special attention; the
1867 generation functions included above do the raw handling. If you
1868 add to this list, modify special_rtx in gengenrtl.c as well. You
1869 should also modify gen_rtx to use the special function. */
1871 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1872 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1873 extern rtx gen_raw_REG (enum machine_mode, int);
1874 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1875 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1876 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1878 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
1880 /* We need the cast here to ensure that we get the same result both with
1881 and without prototypes. */
1882 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
1884 /* Virtual registers are used during RTL generation to refer to locations into
1885 the stack frame when the actual location isn't known until RTL generation
1886 is complete. The routine instantiate_virtual_regs replaces these with
1887 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1890 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1892 /* This points to the first word of the incoming arguments passed on the stack,
1893 either by the caller or by the callee when pretending it was passed by the
1896 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1898 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1900 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1901 variable on the stack. Otherwise, it points to the first variable on
1904 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1906 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1908 /* This points to the location of dynamically-allocated memory on the stack
1909 immediately after the stack pointer has been adjusted by the amount
1912 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1914 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1916 /* This points to the location in the stack at which outgoing arguments should
1917 be written when the stack is pre-pushed (arguments pushed using push
1918 insns always use sp). */
1920 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1922 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1924 /* This points to the Canonical Frame Address of the function. This
1925 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1926 but is calculated relative to the arg pointer for simplicity; the
1927 frame pointer nor stack pointer are necessarily fixed relative to
1928 the CFA until after reload. */
1930 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1932 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1934 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1936 /* Nonzero if REGNUM is a pointer into the stack frame. */
1937 #define REGNO_PTR_FRAME_P(REGNUM) \
1938 ((REGNUM) == STACK_POINTER_REGNUM \
1939 || (REGNUM) == FRAME_POINTER_REGNUM \
1940 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1941 || (REGNUM) == ARG_POINTER_REGNUM \
1942 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1943 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1945 /* REGNUM never really appearing in the INSN stream. */
1946 #define INVALID_REGNUM (~(unsigned int) 0)
1948 extern rtx output_constant_def (tree, int);
1949 extern rtx lookup_constant_def (tree);
1951 /* Called from integrate.c when a deferred constant is inlined. */
1952 extern void notice_rtl_inlining_of_deferred_constant (void);
1954 /* Nonzero after the second flow pass has completed.
1955 Set to 1 or 0 by toplev.c */
1956 extern int flow2_completed;
1958 /* Nonzero after end of reload pass.
1959 Set to 1 or 0 by reload1.c. */
1961 extern int reload_completed;
1963 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1964 extern int epilogue_completed;
1966 /* Set to 1 while reload_as_needed is operating.
1967 Required by some machines to handle any generated moves differently. */
1969 extern int reload_in_progress;
1971 /* If this is nonzero, we do not bother generating VOLATILE
1972 around volatile memory references, and we are willing to
1973 output indirect addresses. If cse is to follow, we reject
1974 indirect addresses so a useful potential cse is generated;
1975 if it is used only once, instruction combination will produce
1976 the same indirect address eventually. */
1977 extern int cse_not_expected;
1979 /* Set to nonzero before life analysis to indicate that it is unsafe to
1980 generate any new pseudo registers. */
1981 extern int no_new_pseudos;
1983 /* Translates rtx code to tree code, for those codes needed by
1984 REAL_ARITHMETIC. The function returns an int because the caller may not
1985 know what `enum tree_code' means. */
1987 extern int rtx_to_tree_code (enum rtx_code);
1990 struct cse_basic_block_data;
1992 /* Return the right cost to give to an operation
1993 to make the cost of the corresponding register-to-register instruction
1994 N times that of a fast register-to-register instruction. */
1995 #define COSTS_N_INSNS(N) ((N) * 4)
1997 /* Maximum cost of an rtl expression. This value has the special meaning
1998 not to use an rtx with this cost under any circumstances. */
1999 #define MAX_COST INT_MAX
2001 extern int rtx_cost (rtx, enum rtx_code);
2002 extern int address_cost (rtx, enum machine_mode);
2003 extern int delete_trivially_dead_insns (rtx, int);
2005 extern int cse_main (rtx, int, int, FILE *);
2007 extern void cse_end_of_basic_block (rtx, struct cse_basic_block_data *,
2009 extern void cse_condition_code_reg (void);
2012 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2013 extern int condjump_p (rtx);
2014 extern int any_condjump_p (rtx);
2015 extern int any_uncondjump_p (rtx);
2016 extern int safe_to_remove_jump_p (rtx);
2017 extern rtx pc_set (rtx);
2018 extern rtx condjump_label (rtx);
2019 extern int simplejump_p (rtx);
2020 extern int returnjump_p (rtx);
2021 extern int onlyjump_p (rtx);
2022 extern int only_sets_cc0_p (rtx);
2023 extern int sets_cc0_p (rtx);
2024 extern int invert_jump_1 (rtx, rtx);
2025 extern int invert_jump (rtx, rtx, int);
2026 extern int rtx_renumbered_equal_p (rtx, rtx);
2027 extern int true_regnum (rtx);
2028 extern unsigned int reg_or_subregno (rtx);
2029 extern int redirect_jump_1 (rtx, rtx);
2030 extern int redirect_jump (rtx, rtx, int);
2031 extern void rebuild_jump_labels (rtx);
2032 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2033 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2035 extern void delete_for_peephole (rtx, rtx);
2036 extern int condjump_in_parallel_p (rtx);
2037 extern void never_reached_warning (rtx, rtx);
2038 extern void purge_line_number_notes (rtx);
2039 extern void copy_loop_headers (rtx);
2041 /* In emit-rtl.c. */
2042 extern int max_reg_num (void);
2043 extern int max_label_num (void);
2044 extern int get_first_label_num (void);
2045 extern void delete_insns_since (rtx);
2046 extern void mark_reg_pointer (rtx, int);
2047 extern void mark_user_reg (rtx);
2048 extern void reset_used_flags (rtx);
2049 extern void set_used_flags (rtx);
2050 extern void reorder_insns (rtx, rtx, rtx);
2051 extern void reorder_insns_nobb (rtx, rtx, rtx);
2052 extern int get_max_uid (void);
2053 extern int in_sequence_p (void);
2054 extern void force_next_line_note (void);
2055 extern void init_emit (void);
2056 extern void init_emit_once (int);
2057 extern void push_topmost_sequence (void);
2058 extern void pop_topmost_sequence (void);
2059 extern int subreg_realpart_p (rtx);
2060 extern void reverse_comparison (rtx);
2061 extern void set_new_first_and_last_insn (rtx, rtx);
2062 extern void set_new_last_label_num (int);
2063 extern void unshare_all_rtl_again (rtx);
2064 extern void unshare_all_rtl_in_chain (rtx);
2065 extern void verify_rtl_sharing (void);
2066 extern void set_first_insn (rtx);
2067 extern void set_last_insn (rtx);
2068 extern void link_cc0_insns (rtx);
2069 extern void add_insn (rtx);
2070 extern void add_insn_before (rtx, rtx);
2071 extern void add_insn_after (rtx, rtx);
2072 extern void remove_insn (rtx);
2073 extern void reorder_insns_with_line_notes (rtx, rtx, rtx);
2074 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
2075 extern enum rtx_code classify_insn (rtx);
2076 extern rtx emit (rtx);
2077 /* Query and clear/ restore no_line_numbers. This is used by the
2078 switch / case handling in stmt.c to give proper line numbers in
2079 warnings about unreachable code. */
2080 int force_line_numbers (void);
2081 void restore_line_number_status (int old_value);
2082 extern void renumber_insns (FILE *);
2083 extern void remove_unnecessary_notes (void);
2084 extern rtx delete_insn (rtx);
2085 extern void delete_insn_chain (rtx, rtx);
2086 extern rtx unlink_insn_chain (rtx, rtx);
2087 extern rtx delete_insn_and_edges (rtx);
2088 extern void delete_insn_chain_and_edges (rtx, rtx);
2091 extern int combine_instructions (rtx, unsigned int);
2092 extern unsigned int extended_count (rtx, enum machine_mode, int);
2093 extern rtx remove_death (unsigned int, rtx);
2095 extern void dump_combine_stats (FILE *);
2096 extern void dump_combine_total_stats (FILE *);
2099 extern void web_main (void);
2103 extern void schedule_insns (FILE *);
2104 extern void schedule_ebbs (FILE *);
2106 extern void fix_sched_param (const char *, const char *);
2108 /* In print-rtl.c */
2109 extern const char *print_rtx_head;
2110 extern void debug_rtx (rtx);
2111 extern void debug_rtx_list (rtx, int);
2112 extern void debug_rtx_range (rtx, rtx);
2113 extern rtx debug_rtx_find (rtx, int);
2115 extern void print_mem_expr (FILE *, tree);
2116 extern void print_rtl (FILE *, rtx);
2117 extern void print_simple_rtl (FILE *, rtx);
2118 extern int print_rtl_single (FILE *, rtx);
2119 extern void print_inline_rtx (FILE *, rtx, int);
2123 extern void init_loop (void);
2124 extern rtx libcall_other_reg (rtx, rtx);
2126 extern void loop_optimize (rtx, FILE *, int);
2128 extern void branch_target_load_optimize (rtx, bool);
2129 extern void record_excess_regs (rtx, rtx, rtx *);
2132 extern void reposition_prologue_and_epilogue_notes (rtx);
2133 extern void thread_prologue_and_epilogue_insns (rtx);
2134 extern int prologue_epilogue_contains (rtx);
2135 extern int sibcall_epilogue_contains (rtx);
2136 extern void preserve_rtl_expr_result (rtx);
2137 extern void mark_temp_addr_taken (rtx);
2138 extern void update_temp_slot_address (rtx, rtx);
2139 extern void purge_addressof (rtx);
2140 extern void purge_hard_subreg_sets (rtx);
2143 extern void set_file_and_line_for_stmt (location_t);
2144 extern void expand_null_return (void);
2145 extern void expand_naked_return (void);
2146 extern void emit_jump (rtx);
2147 extern int preserve_subexpressions_p (void);
2150 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2154 extern void recompute_reg_usage (rtx, int);
2155 extern int initialize_uninitialized_subregs (void);
2156 extern void delete_dead_jumptables (void);
2158 extern void print_rtl_with_bb (FILE *, rtx);
2159 extern void dump_flow_info (FILE *);
2163 extern void init_expmed (void);
2164 extern void expand_inc (rtx, rtx);
2165 extern void expand_dec (rtx, rtx);
2166 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2167 unsigned HOST_WIDE_INT, rtx, int, int);
2170 extern bool can_copy_p (enum machine_mode);
2171 extern rtx fis_get_condition (rtx);
2173 extern int gcse_main (rtx, FILE *);
2174 extern int bypass_jumps (FILE *);
2178 extern void mark_elimination (int, int);
2180 extern int global_alloc (FILE *);
2181 extern void dump_global_regs (FILE *);
2184 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2185 extern void retry_global_alloc (int, HARD_REG_SET);
2187 extern void build_insn_chain (rtx);
2190 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2191 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2192 extern void globalize_reg (int);
2193 extern void init_reg_modes_once (void);
2194 extern void init_regs (void);
2195 extern void init_fake_stack_mems (void);
2196 extern void init_reg_sets (void);
2197 extern void regset_release_memory (void);
2198 extern void regclass_init (void);
2199 extern void regclass (rtx, int, FILE *);
2200 extern void reg_scan (rtx, unsigned int, int);
2201 extern void reg_scan_update (rtx, rtx, unsigned int);
2202 extern void fix_register (const char *, int, int);
2203 extern void init_subregs_of_mode (void);
2204 extern void record_subregs_of_mode (rtx);
2206 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2207 enum machine_mode, unsigned int);
2209 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2212 extern int delete_null_pointer_checks (rtx);
2216 extern void regmove_optimize (rtx, int, FILE *);
2218 extern void combine_stack_adjustments (void);
2222 extern void dbr_schedule (rtx, FILE *);
2225 /* In local-alloc.c */
2227 extern void dump_local_alloc (FILE *);
2229 extern int local_alloc (void);
2230 extern int function_invariant_p (rtx);
2233 extern void init_branch_prob (void);
2234 extern void branch_prob (void);
2235 extern void end_branch_prob (void);
2237 /* In reg-stack.c */
2239 extern bool reg_to_stack (rtx, FILE *);
2248 LCT_CONST_MAKE_BLOCK = 3,
2249 LCT_PURE_MAKE_BLOCK = 4,
2252 LCT_ALWAYS_RETURN = 7,
2253 LCT_RETURNS_TWICE = 8
2256 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2258 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2259 enum machine_mode, int, ...);
2262 extern int set_dominates_use (int, int, int, rtx, rtx);
2265 extern int in_data_section (void);
2266 extern void init_varasm_once (void);
2269 extern void init_rtl (void);
2270 extern void traverse_md_constants (int (*) (void **, void *), void *);
2271 struct md_constant { char *name, *value; };
2274 extern int read_skip_spaces (FILE *);
2275 extern rtx read_rtx (FILE *);
2278 extern const char *read_rtx_filename;
2279 extern int read_rtx_lineno;
2281 /* Redefine abort to report an internal error w/o coredump, and
2282 reporting the location of the error in the source file. This logic
2283 is duplicated in rtl.h and tree.h because every file that needs the
2284 special abort includes one or both. toplev.h gets too few files,
2285 system.h gets too many. */
2287 extern void fancy_abort (const char *, int, const char *)
2289 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2292 extern void clear_reg_alias_info (rtx);
2293 extern rtx canon_rtx (rtx);
2294 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2295 extern rtx get_addr (rtx);
2296 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2298 extern int read_dependence (rtx, rtx);
2299 extern int anti_dependence (rtx, rtx);
2300 extern int output_dependence (rtx, rtx);
2301 extern int unchanging_anti_dependence (rtx, rtx);
2302 extern void mark_constant_function (void);
2303 extern void init_alias_once (void);
2304 extern void init_alias_analysis (void);
2305 extern void end_alias_analysis (void);
2306 extern rtx addr_side_effect_eval (rtx, int, int);
2307 extern bool memory_modified_in_insn_p (rtx, rtx);
2308 extern rtx find_base_term (rtx);
2309 extern rtx get_reg_known_value (unsigned int);
2310 extern bool get_reg_known_equiv_p (unsigned int);
2314 sibcall_use_normal = 1,
2315 sibcall_use_tail_recursion,
2319 extern void optimize_sibling_and_tail_recursive_calls (void);
2320 extern void replace_call_placeholder (rtx, sibcall_use_t);
2323 extern int stack_regs_mentioned (rtx insn);
2327 extern GTY(()) rtx stack_limit_rtx;
2329 /* In regrename.c */
2330 extern void regrename_optimize (void);
2331 extern void copyprop_hardreg_forward (void);
2334 extern void if_convert (int);
2337 extern void invert_br_probabilities (rtx);
2338 extern bool expensive_function_p (int);
2340 extern void tracer (unsigned int);
2342 #endif /* ! GCC_RTL_H */
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