1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006 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, 51 Franklin Street, Fifth Floor, Boston, MA
25 #include "statistics.h"
31 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
32 #undef FLOAT /* Likewise. */
33 #undef ABS /* Likewise. */
34 #undef PC /* Likewise. */
36 /* Value used by some passes to "recognize" noop moves as valid
38 #define NOOP_MOVE_INSN_CODE INT_MAX
40 /* Register Transfer Language EXPRESSIONS CODES */
42 #define RTX_CODE enum rtx_code
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
46 #include "rtl.def" /* rtl expressions are documented here */
49 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
51 Assumes default enum value assignment. */
53 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
54 /* The cast here, saves many elsewhere. */
56 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59 /* We check bit 0-1 of some rtx class codes in the predicates below. */
61 /* Bit 0 = comparison if 0, arithmetic is 1
62 Bit 1 = 1 if commutative. */
68 /* Must follow the four preceding values. */
75 /* Bit 0 = 1 if constant. */
84 #define RTX_OBJ_MASK (~1)
85 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
86 #define RTX_COMPARE_MASK (~1)
87 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
88 #define RTX_ARITHMETIC_MASK (~1)
89 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
90 #define RTX_BINARY_MASK (~3)
91 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
92 #define RTX_COMMUTATIVE_MASK (~2)
93 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
94 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
96 extern const unsigned char rtx_length[NUM_RTX_CODE];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
99 extern const char * const rtx_name[NUM_RTX_CODE];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
102 extern const char * const rtx_format[NUM_RTX_CODE];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
105 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
108 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
109 extern const unsigned char rtx_next[NUM_RTX_CODE];
111 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
112 relative to which the offsets are calculated, as explained in rtl.def. */
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align: 8;
118 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
119 unsigned min_after_vec: 1; /* minimum address target label is
120 after the ADDR_DIFF_VEC. */
121 unsigned max_after_vec: 1; /* maximum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned min_after_base: 1; /* minimum address target label is
125 unsigned max_after_base: 1; /* maximum address target label is
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
131 } addr_diff_vec_flags;
133 /* Structure used to describe the attributes of a MEM. These are hashed
134 so MEMs that the same attributes share a data structure. This means
135 they cannot be modified in place. If any element is nonzero, it means
136 the value of the corresponding attribute is unknown. */
137 /* ALIGN and SIZE are the alignment and size of the MEM itself,
138 while EXPR can describe a larger underlying object, which might have a
139 stricter alignment; OFFSET is the offset of the MEM within that object. */
140 typedef struct mem_attrs GTY(())
142 HOST_WIDE_INT alias; /* Memory alias set. */
143 tree expr; /* expr corresponding to MEM. */
144 rtx offset; /* Offset from start of DECL, as CONST_INT. */
145 rtx size; /* Size in bytes, as a CONST_INT. */
146 unsigned int align; /* Alignment of MEM in bits. */
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
152 typedef struct reg_attrs GTY(())
154 tree decl; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset; /* Offset from start of DECL. */
158 /* Common union for an element of an rtx. */
163 unsigned int rt_uint;
167 enum machine_mode rt_type;
168 addr_diff_vec_flags rt_addr_diff_vec_flags;
169 struct cselib_val_struct *rt_cselib;
170 struct bitmap_head_def *rt_bit;
172 struct basic_block_def *rt_bb;
175 struct constant_descriptor_rtx *rt_constant;
177 typedef union rtunion_def rtunion;
179 /* This structure remembers the position of a SYMBOL_REF within an
180 object_block structure. A SYMBOL_REF only provides this information
181 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
182 struct block_symbol GTY(()) {
183 /* The usual SYMBOL_REF fields. */
184 rtunion GTY ((skip)) fld[3];
186 /* The block that contains this object. */
187 struct object_block *block;
189 /* The offset of this object from the start of its block. It is negative
190 if the symbol has not yet been assigned an offset. */
191 HOST_WIDE_INT offset;
195 DEF_VEC_ALLOC_P(rtx,heap);
196 DEF_VEC_ALLOC_P(rtx,gc);
198 /* Describes a group of objects that are to be placed together in such
199 a way that their relative positions are known. */
200 struct object_block GTY(())
202 /* The section in which these objects should be placed. */
205 /* The alignment of the first object, measured in bits. */
206 unsigned int alignment;
208 /* The total size of the objects, measured in bytes. */
211 /* The SYMBOL_REFs for each object. The vector is sorted in
212 order of increasing offset and the following conditions will
213 hold for each element X:
215 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
216 !SYMBOL_REF_ANCHOR_P (X)
217 SYMBOL_REF_BLOCK (X) == [address of this structure]
218 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
219 VEC(rtx,gc) *objects;
221 /* All the anchor SYMBOL_REFs used to address these objects, sorted
222 in order of increasing offset, and then increasing TLS model.
223 The following conditions will hold for each element X in this vector:
225 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
226 SYMBOL_REF_ANCHOR_P (X)
227 SYMBOL_REF_BLOCK (X) == [address of this structure]
228 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
229 VEC(rtx,gc) *anchors;
232 /* RTL expression ("rtx"). */
234 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
235 chain_prev ("RTX_PREV (&%h)")))
237 /* The kind of expression this is. */
238 ENUM_BITFIELD(rtx_code) code: 16;
240 /* The kind of value the expression has. */
241 ENUM_BITFIELD(machine_mode) mode : 8;
243 /* 1 in a MEM if we should keep the alias set for this mem unchanged
244 when we access a component.
245 1 in a CALL_INSN if it is a sibling call.
246 1 in a SET that is for a return.
247 In a CODE_LABEL, part of the two-bit alternate entry field. */
248 unsigned int jump : 1;
249 /* In a CODE_LABEL, part of the two-bit alternate entry field.
250 1 in a MEM if it cannot trap. */
251 unsigned int call : 1;
252 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
253 1 in a SUBREG if it references an unsigned object whose mode has been
254 from a promoted to a wider mode.
255 1 in a SYMBOL_REF if it addresses something in the per-function
257 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
258 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
259 unsigned int unchanging : 1;
260 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
261 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
262 if it has been deleted.
263 1 in a REG expression if corresponds to a variable declared by the user,
264 0 for an internally generated temporary.
265 1 in a SUBREG with a negative value.
266 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
267 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
268 unsigned int volatil : 1;
269 /* 1 in a MEM referring to a field of an aggregate.
270 0 if the MEM was a variable or the result of a * operator in C;
271 1 if it was the result of a . or -> operator (on a struct) in C.
272 1 in a REG if the register is used only in exit code a loop.
273 1 in a SUBREG expression if was generated from a variable with a
275 1 in a CODE_LABEL if the label is used for nonlocal gotos
276 and must not be deleted even if its count is zero.
277 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
278 together with the preceding insn. Valid only within sched.
279 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
280 from the target of a branch. Valid from reorg until end of compilation;
281 cleared before used. */
282 unsigned int in_struct : 1;
283 /* At the end of RTL generation, 1 if this rtx is used. This is used for
284 copying shared structure. See `unshare_all_rtl'.
285 In a REG, this is not needed for that purpose, and used instead
286 in `leaf_renumber_regs_insn'.
287 1 in a SYMBOL_REF, means that emit_library_call
288 has used it as the function. */
289 unsigned int used : 1;
290 /* 1 in an INSN or a SET if this rtx is related to the call frame,
291 either changing how we compute the frame address or saving and
292 restoring registers in the prologue and epilogue.
293 1 in a REG or MEM if it is a pointer.
294 1 in a SYMBOL_REF if it addresses something in the per-function
295 constant string pool. */
296 unsigned frame_related : 1;
297 /* 1 in a REG or PARALLEL that is the current function's return value.
298 1 in a MEM if it refers to a scalar.
299 1 in a SYMBOL_REF for a weak symbol. */
300 unsigned return_val : 1;
302 /* The first element of the operands of this rtx.
303 The number of operands and their types are controlled
304 by the `code' field, according to rtl.def. */
307 HOST_WIDE_INT hwint[1];
308 struct block_symbol block_sym;
309 struct real_value rv;
310 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
313 /* The size in bytes of an rtx header (code, mode and flags). */
314 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
316 /* The size in bytes of an rtx with code CODE. */
317 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
319 #define NULL_RTX (rtx) 0
321 /* The "next" and "previous" RTX, relative to this one. */
323 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
324 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
326 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
328 #define RTX_PREV(X) ((INSN_P (X) \
332 && PREV_INSN (X) != NULL \
333 && NEXT_INSN (PREV_INSN (X)) == X \
334 ? PREV_INSN (X) : NULL)
336 /* Define macros to access the `code' field of the rtx. */
338 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
339 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
341 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
342 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
344 /* RTL vector. These appear inside RTX's when there is a need
345 for a variable number of things. The principle use is inside
346 PARALLEL expressions. */
348 struct rtvec_def GTY(()) {
349 int num_elem; /* number of elements */
350 rtx GTY ((length ("%h.num_elem"))) elem[1];
353 #define NULL_RTVEC (rtvec) 0
355 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
356 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
358 /* Predicate yielding nonzero iff X is an rtx for a register. */
359 #define REG_P(X) (GET_CODE (X) == REG)
361 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
362 #define MEM_P(X) (GET_CODE (X) == MEM)
364 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
365 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
367 /* Predicate yielding nonzero iff X is a label insn. */
368 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
370 /* Predicate yielding nonzero iff X is a jump insn. */
371 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
373 /* Predicate yielding nonzero iff X is a call insn. */
374 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
376 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
377 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
379 /* Predicate yielding nonzero iff X is a real insn. */
381 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
383 /* Predicate yielding nonzero iff X is a note insn. */
384 #define NOTE_P(X) (GET_CODE (X) == NOTE)
386 /* Predicate yielding nonzero iff X is a barrier insn. */
387 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
389 /* Predicate yielding nonzero iff X is a data for a jump table. */
390 #define JUMP_TABLE_DATA_P(INSN) \
391 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
392 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
394 /* 1 if X is a unary operator. */
397 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
399 /* 1 if X is a binary operator. */
401 #define BINARY_P(X) \
402 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
404 /* 1 if X is an arithmetic operator. */
406 #define ARITHMETIC_P(X) \
407 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
408 == RTX_ARITHMETIC_RESULT)
410 /* 1 if X is an arithmetic operator. */
412 #define COMMUTATIVE_ARITH_P(X) \
413 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
415 /* 1 if X is a commutative arithmetic operator or a comparison operator.
416 These two are sometimes selected together because it is possible to
417 swap the two operands. */
419 #define SWAPPABLE_OPERANDS_P(X) \
420 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
421 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
422 | (1 << RTX_COMPARE)))
424 /* 1 if X is a non-commutative operator. */
426 #define NON_COMMUTATIVE_P(X) \
427 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
428 == RTX_NON_COMMUTATIVE_RESULT)
430 /* 1 if X is a commutative operator on integers. */
432 #define COMMUTATIVE_P(X) \
433 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
434 == RTX_COMMUTATIVE_RESULT)
436 /* 1 if X is a relational operator. */
438 #define COMPARISON_P(X) \
439 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
441 /* 1 if X is a constant value that is an integer. */
443 #define CONSTANT_P(X) \
444 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
446 /* 1 if X can be used to represent an object. */
447 #define OBJECT_P(X) \
448 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
450 /* General accessor macros for accessing the fields of an rtx. */
452 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
453 /* The bit with a star outside the statement expr and an & inside is
454 so that N can be evaluated only once. */
455 #define RTL_CHECK1(RTX, N, C1) __extension__ \
456 (*({ rtx const _rtx = (RTX); const int _n = (N); \
457 const enum rtx_code _code = GET_CODE (_rtx); \
458 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
459 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
461 if (GET_RTX_FORMAT(_code)[_n] != C1) \
462 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
464 &_rtx->u.fld[_n]; }))
466 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
467 (*({ rtx const _rtx = (RTX); const int _n = (N); \
468 const enum rtx_code _code = GET_CODE (_rtx); \
469 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
470 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
472 if (GET_RTX_FORMAT(_code)[_n] != C1 \
473 && GET_RTX_FORMAT(_code)[_n] != C2) \
474 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
476 &_rtx->u.fld[_n]; }))
478 #define RTL_CHECKC1(RTX, N, C) __extension__ \
479 (*({ rtx const _rtx = (RTX); const int _n = (N); \
480 if (GET_CODE (_rtx) != (C)) \
481 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
483 &_rtx->u.fld[_n]; }))
485 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
486 (*({ rtx const _rtx = (RTX); const int _n = (N); \
487 const enum rtx_code _code = GET_CODE (_rtx); \
488 if (_code != (C1) && _code != (C2)) \
489 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
491 &_rtx->u.fld[_n]; }))
493 #define RTVEC_ELT(RTVEC, I) __extension__ \
494 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
495 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
496 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
498 &_rtvec->elem[_i]; }))
500 #define XWINT(RTX, N) __extension__ \
501 (*({ rtx const _rtx = (RTX); const int _n = (N); \
502 const enum rtx_code _code = GET_CODE (_rtx); \
503 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
504 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
506 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
507 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
509 &_rtx->u.hwint[_n]; }))
511 #define XCWINT(RTX, N, C) __extension__ \
512 (*({ rtx const _rtx = (RTX); \
513 if (GET_CODE (_rtx) != (C)) \
514 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
516 &_rtx->u.hwint[N]; }))
518 #define XCMWINT(RTX, N, C, M) __extension__ \
519 (*({ rtx const _rtx = (RTX); \
520 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
521 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
522 __LINE__, __FUNCTION__); \
523 &_rtx->u.hwint[N]; }))
525 #define XCNMPRV(RTX, C, M) __extension__ \
526 ({ rtx const _rtx = (RTX); \
527 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
528 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
529 __LINE__, __FUNCTION__); \
532 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
533 ({ rtx const _symbol = (RTX); \
534 unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
535 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
536 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
538 &_symbol->u.block_sym; })
540 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
543 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
546 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
549 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
552 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
553 const char *, int, const char *)
555 extern void rtl_check_failed_code_mode (rtx, enum rtx_code, enum machine_mode,
556 bool, const char *, int, const char *)
558 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
560 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
564 #else /* not ENABLE_RTL_CHECKING */
566 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
567 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
568 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
569 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
570 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
571 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
572 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
573 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
574 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
575 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
576 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
580 /* General accessor macros for accessing the flags of an rtx. */
582 /* Access an individual rtx flag, with no checking of any kind. */
583 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
585 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
586 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
587 ({ rtx const _rtx = (RTX); \
588 if (GET_CODE(_rtx) != C1) \
589 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
593 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
594 ({ rtx const _rtx = (RTX); \
595 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
596 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
600 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
601 ({ rtx const _rtx = (RTX); \
602 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
603 && GET_CODE(_rtx) != C3) \
604 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
608 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
609 ({ rtx const _rtx = (RTX); \
610 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
611 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
612 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
616 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
617 ({ rtx const _rtx = (RTX); \
618 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
619 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
620 && GET_CODE(_rtx) != C5) \
621 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
625 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
627 ({ rtx const _rtx = (RTX); \
628 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
629 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
630 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
631 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
635 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
637 ({ rtx const _rtx = (RTX); \
638 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
639 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
640 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
641 && GET_CODE(_rtx) != C7) \
642 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
646 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
648 ({ rtx const _rtx = (RTX); \
649 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
650 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
651 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
652 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
653 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
657 extern void rtl_check_failed_flag (const char *, rtx, const char *,
662 #else /* not ENABLE_RTL_FLAG_CHECKING */
664 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
665 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
666 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
667 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
668 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
669 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
670 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
671 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
674 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
675 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
676 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
677 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
678 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
679 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
680 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
681 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
682 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
684 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
685 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
687 /* These are like XINT, etc. except that they expect a '0' field instead
688 of the normal type code. */
690 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
691 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
692 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
693 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
694 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
695 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
696 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
697 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
698 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
699 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
700 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
701 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
702 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
703 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
705 /* Access a '0' field with any type. */
706 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
708 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
709 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
710 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
711 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
712 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
713 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
714 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
715 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
716 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
717 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
719 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
720 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
722 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
724 /* ACCESS MACROS for particular fields of insns. */
726 /* Holds a unique number for each insn.
727 These are not necessarily sequentially increasing. */
728 #define INSN_UID(INSN) XINT (INSN, 0)
730 /* Chain insns together in sequence. */
731 #define PREV_INSN(INSN) XEXP (INSN, 1)
732 #define NEXT_INSN(INSN) XEXP (INSN, 2)
734 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
735 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
736 /* The body of an insn. */
737 #define PATTERN(INSN) XEXP (INSN, 5)
739 /* Code number of instruction, from when it was recognized.
740 -1 means this instruction has not been recognized yet. */
741 #define INSN_CODE(INSN) XINT (INSN, 6)
743 /* Set up in flow.c; empty before then.
744 Holds a chain of INSN_LIST rtx's whose first operands point at
745 previous insns with direct data-flow connections to this one.
746 That means that those insns set variables whose next use is in this insn.
747 They are always in the same basic block as this insn. */
748 #define LOG_LINKS(INSN) XEXP(INSN, 7)
750 #define RTX_FRAME_RELATED_P(RTX) \
751 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
752 JUMP_INSN, BARRIER, SET)->frame_related)
754 /* 1 if RTX is an insn that has been deleted. */
755 #define INSN_DELETED_P(RTX) \
756 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
757 CODE_LABEL, BARRIER, NOTE)->volatil)
759 /* 1 if RTX is a call to a const or pure function. */
760 #define CONST_OR_PURE_CALL_P(RTX) \
761 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
762 EXPR_LIST)->unchanging)
764 /* 1 if RTX is a call_insn for a sibling call. */
765 #define SIBLING_CALL_P(RTX) \
766 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
768 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
769 #define INSN_ANNULLED_BRANCH_P(RTX) \
770 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
772 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
773 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
774 executed if the branch is taken. For annulled branches with this bit
775 clear, the insn should be executed only if the branch is not taken. */
776 #define INSN_FROM_TARGET_P(RTX) \
777 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
779 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
780 See the comments for ADDR_DIFF_VEC in rtl.def. */
781 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
783 /* In a VALUE, the value cselib has assigned to RTX.
784 This is a "struct cselib_val_struct", see cselib.h. */
785 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
787 /* Holds a list of notes on what this insn does to various REGs.
788 It is a chain of EXPR_LIST rtx's, where the second operand is the
789 chain pointer and the first operand is the REG being described.
790 The mode field of the EXPR_LIST contains not a real machine mode
791 but a value from enum reg_note. */
792 #define REG_NOTES(INSN) XEXP(INSN, 8)
796 #define DEF_REG_NOTE(NAME) NAME,
797 #include "reg-notes.def"
802 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
803 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
804 #define PUT_REG_NOTE_KIND(LINK, KIND) \
805 PUT_MODE (LINK, (enum machine_mode) (KIND))
807 /* Names for REG_NOTE's in EXPR_LIST insn's. */
809 extern const char * const reg_note_name[];
810 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
812 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
813 USE and CLOBBER expressions.
814 USE expressions list the registers filled with arguments that
815 are passed to the function.
816 CLOBBER expressions document the registers explicitly clobbered
818 Pseudo registers can not be mentioned in this list. */
819 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
821 /* The label-number of a code-label. The assembler label
822 is made from `L' and the label-number printed in decimal.
823 Label numbers are unique in a compilation. */
824 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
826 /* In a NOTE that is a line number, this is a string for the file name that the
827 line is in. We use the same field to record block numbers temporarily in
828 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
829 between ints and pointers if we use a different macro for the block number.)
833 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
834 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
835 #ifdef USE_MAPPED_LOCATION
836 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
837 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
838 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
839 #define SET_INSN_DELETED(INSN) \
840 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
842 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
843 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
844 (XLOC).line = NOTE_LINE_NUMBER (INSN))
845 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
846 #define SET_INSN_DELETED(INSN) \
847 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
848 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
850 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
851 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
852 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
853 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
855 /* In a NOTE that is a line number, this is the line number.
856 Other kinds of NOTEs are identified by negative numbers here. */
857 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
859 /* Nonzero if INSN is a note marking the beginning of a basic block. */
860 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
861 (GET_CODE (INSN) == NOTE \
862 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
864 /* Variable declaration and the location of a variable. */
865 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
867 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
870 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
871 that are not line numbers. These codes are all negative.
873 Notice that we do not try to use zero here for any of
874 the special note codes because sometimes the source line
875 actually can be zero! This happens (for example) when we
876 are generating code for the per-translation-unit constructor
877 and destructor routines for some C++ translation unit. */
881 /* Keep all of these numbers negative. Adjust as needed. */
882 NOTE_INSN_BIAS = -100,
884 #define DEF_INSN_NOTE(NAME) NAME,
885 #include "insn-notes.def"
891 /* Names for NOTE insn's other than line numbers. */
893 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
894 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
895 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
897 /* The name of a label, in case it corresponds to an explicit label
898 in the input source code. */
899 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
901 /* In jump.c, each label contains a count of the number
902 of LABEL_REFs that point at it, so unused labels can be deleted. */
903 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
905 /* Labels carry a two-bit field composed of the ->jump and ->call
906 bits. This field indicates whether the label is an alternate
907 entry point, and if so, what kind. */
910 LABEL_NORMAL = 0, /* ordinary label */
911 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
912 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
913 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
916 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
918 /* Retrieve the kind of LABEL. */
919 #define LABEL_KIND(LABEL) __extension__ \
920 ({ rtx const _label = (LABEL); \
921 if (GET_CODE (_label) != CODE_LABEL) \
922 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
924 (enum label_kind) ((_label->jump << 1) | _label->call); })
926 /* Set the kind of LABEL. */
927 #define SET_LABEL_KIND(LABEL, KIND) do { \
928 rtx _label = (LABEL); \
929 unsigned int _kind = (KIND); \
930 if (GET_CODE (_label) != CODE_LABEL) \
931 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
933 _label->jump = ((_kind >> 1) & 1); \
934 _label->call = (_kind & 1); \
939 /* Retrieve the kind of LABEL. */
940 #define LABEL_KIND(LABEL) \
941 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
943 /* Set the kind of LABEL. */
944 #define SET_LABEL_KIND(LABEL, KIND) do { \
945 rtx _label = (LABEL); \
946 unsigned int _kind = (KIND); \
947 _label->jump = ((_kind >> 1) & 1); \
948 _label->call = (_kind & 1); \
951 #endif /* rtl flag checking */
953 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
955 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
956 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
957 be decremented and possibly the label can be deleted. */
958 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
960 /* Once basic blocks are found in flow.c,
961 each CODE_LABEL starts a chain that goes through
962 all the LABEL_REFs that jump to that label.
963 The chain eventually winds up at the CODE_LABEL: it is circular. */
964 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
966 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
967 the number the register originally had; for a pseudo register turned into
968 a hard reg this will hold the old pseudo register number. */
970 #define REGNO(RTX) XCUINT (RTX, 0, REG)
971 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
973 /* 1 if RTX is a reg or parallel that is the current function's return
975 #define REG_FUNCTION_VALUE_P(RTX) \
976 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
978 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
979 #define REG_USERVAR_P(RTX) \
980 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
982 /* 1 if RTX is a reg that holds a pointer value. */
983 #define REG_POINTER(RTX) \
984 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
986 /* 1 if RTX is a mem that holds a pointer value. */
987 #define MEM_POINTER(RTX) \
988 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
990 /* 1 if the given register REG corresponds to a hard register. */
991 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
993 /* 1 if the given register number REG_NO corresponds to a hard register. */
994 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
996 /* For a CONST_INT rtx, INTVAL extracts the integer. */
997 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
998 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1000 /* For a CONST_DOUBLE:
1001 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1002 low-order word and ..._HIGH the high-order.
1003 For a float, there is a REAL_VALUE_TYPE structure, and
1004 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1005 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1006 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1007 #define CONST_DOUBLE_REAL_VALUE(r) \
1008 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1010 /* For a CONST_VECTOR, return element #n. */
1011 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1013 /* For a CONST_VECTOR, return the number of elements in a vector. */
1014 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1016 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1017 SUBREG_BYTE extracts the byte-number. */
1019 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1020 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1023 /* Return the right cost to give to an operation
1024 to make the cost of the corresponding register-to-register instruction
1025 N times that of a fast register-to-register instruction. */
1026 #define COSTS_N_INSNS(N) ((N) * 4)
1028 /* Maximum cost of an rtl expression. This value has the special meaning
1029 not to use an rtx with this cost under any circumstances. */
1030 #define MAX_COST INT_MAX
1032 extern void init_rtlanal (void);
1033 extern int rtx_cost (rtx, enum rtx_code);
1034 extern int address_cost (rtx, enum machine_mode);
1035 extern unsigned int subreg_lsb (rtx);
1036 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1038 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1039 unsigned int, enum machine_mode);
1040 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1041 unsigned int, enum machine_mode);
1042 extern unsigned int subreg_regno (rtx);
1043 extern unsigned int subreg_nregs (rtx);
1044 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1045 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1046 extern bool constant_pool_constant_p (rtx);
1047 extern bool truncated_to_mode (enum machine_mode, rtx);
1050 /* 1 if RTX is a subreg containing a reg that is already known to be
1051 sign- or zero-extended from the mode of the subreg to the mode of
1052 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1055 When used as a LHS, is means that this extension must be done
1056 when assigning to SUBREG_REG. */
1058 #define SUBREG_PROMOTED_VAR_P(RTX) \
1059 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1061 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1063 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1065 _rtx->volatil = 1; \
1067 _rtx->volatil = 0; \
1068 _rtx->unchanging = (VAL); \
1071 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1072 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1073 ? -1 : (RTX)->unchanging)
1075 /* Access various components of an ASM_OPERANDS rtx. */
1077 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1078 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1079 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1080 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1081 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1082 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1083 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1084 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1085 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1086 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1087 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1088 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1089 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1090 #ifdef USE_MAPPED_LOCATION
1091 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1093 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1094 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1097 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1098 #define MEM_READONLY_P(RTX) \
1099 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1101 /* 1 if RTX is a mem and we should keep the alias set for this mem
1102 unchanged when we access a component. Set to 1, or example, when we
1103 are already in a non-addressable component of an aggregate. */
1104 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1105 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1107 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1108 #define MEM_VOLATILE_P(RTX) \
1109 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1110 ASM_INPUT)->volatil)
1112 /* 1 if RTX is a mem that refers to an aggregate, either to the
1113 aggregate itself or to a field of the aggregate. If zero, RTX may
1114 or may not be such a reference. */
1115 #define MEM_IN_STRUCT_P(RTX) \
1116 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1118 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1119 not refer to a scalar. */
1120 #define MEM_SCALAR_P(RTX) \
1121 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1123 /* 1 if RTX is a mem that cannot trap. */
1124 #define MEM_NOTRAP_P(RTX) \
1125 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1127 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1128 RTX. Otherwise, vice versa. Use this macro only when you are
1129 *sure* that you know that the MEM is in a structure, or is a
1130 scalar. VAL is evaluated only once. */
1131 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1135 MEM_IN_STRUCT_P (RTX) = 1; \
1136 MEM_SCALAR_P (RTX) = 0; \
1140 MEM_IN_STRUCT_P (RTX) = 0; \
1141 MEM_SCALAR_P (RTX) = 1; \
1145 /* The memory attribute block. We provide access macros for each value
1146 in the block and provide defaults if none specified. */
1147 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1149 /* The register attribute block. We provide access macros for each value
1150 in the block and provide defaults if none specified. */
1151 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1153 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1154 set, and may alias anything. Otherwise, the MEM can only alias
1155 MEMs in a conflicting alias set. This value is set in a
1156 language-dependent manner in the front-end, and should not be
1157 altered in the back-end. These set numbers are tested with
1158 alias_sets_conflict_p. */
1159 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1161 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1162 refer to part of a DECL. It may also be a COMPONENT_REF. */
1163 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1165 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1166 RTX that is always a CONST_INT. */
1167 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1169 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1170 is always a CONST_INT. */
1171 #define MEM_SIZE(RTX) \
1172 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1173 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1176 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1177 mode as a default when STRICT_ALIGNMENT, but not if not. */
1178 #define MEM_ALIGN(RTX) \
1179 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1180 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1181 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1183 /* For a REG rtx, the decl it is known to refer to, if it is known to
1184 refer to part of a DECL. */
1185 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1187 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1188 RTX that is always a CONST_INT. */
1189 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1191 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1192 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1193 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1194 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1195 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1196 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1197 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1198 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1199 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1200 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1202 /* 1 if RTX is a label_ref for a nonlocal label. */
1203 /* Likewise in an expr_list for a reg_label note. */
1204 #define LABEL_REF_NONLOCAL_P(RTX) \
1205 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1206 REG_LABEL)->volatil)
1208 /* 1 if RTX is a code_label that should always be considered to be needed. */
1209 #define LABEL_PRESERVE_P(RTX) \
1210 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1212 /* During sched, 1 if RTX is an insn that must be scheduled together
1213 with the preceding insn. */
1214 #define SCHED_GROUP_P(RTX) \
1215 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1218 /* For a SET rtx, SET_DEST is the place that is set
1219 and SET_SRC is the value it is set to. */
1220 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1221 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1222 #define SET_IS_RETURN_P(RTX) \
1223 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1225 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1226 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1227 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1229 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1230 conditionally executing the code on, COND_EXEC_CODE is the code
1231 to execute if the condition is true. */
1232 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1233 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1235 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1237 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1238 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1240 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1241 tree constant pool. This information is private to varasm.c. */
1242 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1243 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1244 (RTX), SYMBOL_REF)->frame_related)
1246 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1247 #define SYMBOL_REF_FLAG(RTX) \
1248 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1250 /* 1 if RTX is a symbol_ref that has been the library function in
1251 emit_library_call. */
1252 #define SYMBOL_REF_USED(RTX) \
1253 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1255 /* 1 if RTX is a symbol_ref for a weak symbol. */
1256 #define SYMBOL_REF_WEAK(RTX) \
1257 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1259 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1260 SYMBOL_REF_CONSTANT. */
1261 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1263 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1265 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1266 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1268 /* The tree (decl or constant) associated with the symbol, or null. */
1269 #define SYMBOL_REF_DECL(RTX) \
1270 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1272 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1273 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1274 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1276 /* The rtx constant pool entry for a symbol, or null. */
1277 #define SYMBOL_REF_CONSTANT(RTX) \
1278 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1280 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1281 information derivable from the tree decl associated with this symbol.
1282 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1283 decl. In some cases this is a bug. But beyond that, it's nice to cache
1284 this information to avoid recomputing it. Finally, this allows space for
1285 the target to store more than one bit of information, as with
1287 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1289 /* These flags are common enough to be defined for all targets. They
1290 are computed by the default version of targetm.encode_section_info. */
1292 /* Set if this symbol is a function. */
1293 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1294 #define SYMBOL_REF_FUNCTION_P(RTX) \
1295 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1296 /* Set if targetm.binds_local_p is true. */
1297 #define SYMBOL_FLAG_LOCAL (1 << 1)
1298 #define SYMBOL_REF_LOCAL_P(RTX) \
1299 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1300 /* Set if targetm.in_small_data_p is true. */
1301 #define SYMBOL_FLAG_SMALL (1 << 2)
1302 #define SYMBOL_REF_SMALL_P(RTX) \
1303 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1304 /* The three-bit field at [5:3] is true for TLS variables; use
1305 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1306 #define SYMBOL_FLAG_TLS_SHIFT 3
1307 #define SYMBOL_REF_TLS_MODEL(RTX) \
1308 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1309 /* Set if this symbol is not defined in this translation unit. */
1310 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1311 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1312 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1313 /* Set if this symbol has a block_symbol structure associated with it. */
1314 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1315 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1316 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1317 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1318 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1319 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1320 #define SYMBOL_REF_ANCHOR_P(RTX) \
1321 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1323 /* Subsequent bits are available for the target to use. */
1324 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1325 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1327 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1328 structure to which the symbol belongs, or NULL if it has not been
1329 assigned a block. */
1330 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1332 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1333 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1334 RTX has not yet been assigned to a block, or it has not been given an
1335 offset within that block. */
1336 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1338 /* Define a macro to look for REG_INC notes,
1339 but save time on machines where they never exist. */
1341 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1342 #define FIND_REG_INC_NOTE(INSN, REG) \
1343 ((REG) != NULL_RTX && REG_P ((REG)) \
1344 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1345 : find_reg_note ((INSN), REG_INC, (REG)))
1347 #define FIND_REG_INC_NOTE(INSN, REG) 0
1350 /* Indicate whether the machine has any sort of auto increment addressing.
1351 If not, we can avoid checking for REG_INC notes. */
1353 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1354 #define AUTO_INC_DEC
1357 #ifndef HAVE_PRE_INCREMENT
1358 #define HAVE_PRE_INCREMENT 0
1361 #ifndef HAVE_PRE_DECREMENT
1362 #define HAVE_PRE_DECREMENT 0
1365 #ifndef HAVE_POST_INCREMENT
1366 #define HAVE_POST_INCREMENT 0
1369 #ifndef HAVE_POST_DECREMENT
1370 #define HAVE_POST_DECREMENT 0
1373 #ifndef HAVE_POST_MODIFY_DISP
1374 #define HAVE_POST_MODIFY_DISP 0
1377 #ifndef HAVE_POST_MODIFY_REG
1378 #define HAVE_POST_MODIFY_REG 0
1381 #ifndef HAVE_PRE_MODIFY_DISP
1382 #define HAVE_PRE_MODIFY_DISP 0
1385 #ifndef HAVE_PRE_MODIFY_REG
1386 #define HAVE_PRE_MODIFY_REG 0
1390 /* Some architectures do not have complete pre/post increment/decrement
1391 instruction sets, or only move some modes efficiently. These macros
1392 allow us to tune autoincrement generation. */
1394 #ifndef USE_LOAD_POST_INCREMENT
1395 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1398 #ifndef USE_LOAD_POST_DECREMENT
1399 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1402 #ifndef USE_LOAD_PRE_INCREMENT
1403 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1406 #ifndef USE_LOAD_PRE_DECREMENT
1407 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1410 #ifndef USE_STORE_POST_INCREMENT
1411 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1414 #ifndef USE_STORE_POST_DECREMENT
1415 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1418 #ifndef USE_STORE_PRE_INCREMENT
1419 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1422 #ifndef USE_STORE_PRE_DECREMENT
1423 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1426 /* Nonzero when we are generating CONCATs. */
1427 extern int generating_concat_p;
1429 /* Nonzero when we are expanding trees to RTL. */
1430 extern int currently_expanding_to_rtl;
1432 /* Generally useful functions. */
1435 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1438 extern void set_stack_check_libfunc (rtx);
1439 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1440 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1443 extern rtvec gen_rtvec (int, ...);
1444 extern rtx copy_insn_1 (rtx);
1445 extern rtx copy_insn (rtx);
1446 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1447 extern rtx emit_copy_of_insn_after (rtx, rtx);
1448 extern void set_reg_attrs_from_mem (rtx, rtx);
1449 extern void set_mem_attrs_from_reg (rtx, rtx);
1450 extern void set_reg_attrs_for_parm (rtx, rtx);
1451 extern int mem_expr_equal_p (tree, tree);
1454 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1455 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1457 extern rtvec rtvec_alloc (int);
1458 extern rtx copy_rtx (rtx);
1459 extern void dump_rtx_statistics (void);
1462 extern rtx copy_rtx_if_shared (rtx);
1465 extern unsigned int rtx_size (rtx);
1466 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1467 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1468 extern int rtx_equal_p (rtx, rtx);
1471 extern rtvec gen_rtvec_v (int, rtx *);
1472 extern rtx gen_reg_rtx (enum machine_mode);
1473 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1474 extern rtx gen_label_rtx (void);
1475 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1478 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1481 extern rtx gen_highpart (enum machine_mode, rtx);
1482 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1483 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1486 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1487 extern int subreg_lowpart_p (rtx);
1488 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1490 extern unsigned int subreg_highpart_offset (enum machine_mode,
1492 extern rtx make_safe_from (rtx, rtx);
1493 extern rtx convert_memory_address (enum machine_mode, rtx);
1494 extern rtx get_insns (void);
1495 extern const char *get_insn_name (int);
1496 extern rtx get_last_insn (void);
1497 extern rtx get_last_insn_anywhere (void);
1498 extern rtx get_first_nonnote_insn (void);
1499 extern rtx get_last_nonnote_insn (void);
1500 extern void start_sequence (void);
1501 extern void push_to_sequence (rtx);
1502 extern void end_sequence (void);
1503 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1508 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1511 extern rtx force_const_mem (enum machine_mode, rtx);
1516 extern rtx get_pool_constant (rtx);
1517 extern rtx get_pool_constant_mark (rtx, bool *);
1518 extern enum machine_mode get_pool_mode (rtx);
1519 extern rtx simplify_subtraction (rtx);
1522 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1523 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1524 extern rtx assign_stack_temp_for_type (enum machine_mode,
1525 HOST_WIDE_INT, int, tree);
1526 extern rtx assign_temp (tree, int, int, int);
1529 extern rtx emit_insn_before (rtx, rtx);
1530 extern rtx emit_insn_before_noloc (rtx, rtx);
1531 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1532 extern rtx emit_jump_insn_before (rtx, rtx);
1533 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1534 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1535 extern rtx emit_call_insn_before (rtx, rtx);
1536 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1537 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1538 extern rtx emit_barrier_before (rtx);
1539 extern rtx emit_label_before (rtx, rtx);
1540 extern rtx emit_note_before (int, rtx);
1541 extern rtx emit_insn_after (rtx, rtx);
1542 extern rtx emit_insn_after_noloc (rtx, rtx);
1543 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1544 extern rtx emit_jump_insn_after (rtx, rtx);
1545 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1546 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1547 extern rtx emit_call_insn_after (rtx, rtx);
1548 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1549 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1550 extern rtx emit_barrier_after (rtx);
1551 extern rtx emit_label_after (rtx, rtx);
1552 extern rtx emit_note_after (int, rtx);
1553 extern rtx emit_insn (rtx);
1554 extern rtx emit_jump_insn (rtx);
1555 extern rtx emit_call_insn (rtx);
1556 extern rtx emit_label (rtx);
1557 extern rtx emit_barrier (void);
1558 extern rtx emit_note (int);
1559 extern rtx emit_note_copy (rtx);
1560 extern rtx emit_line_note (location_t);
1561 extern rtx make_insn_raw (rtx);
1562 extern rtx make_jump_insn_raw (rtx);
1563 extern void add_function_usage_to (rtx, rtx);
1564 extern rtx last_call_insn (void);
1565 extern rtx previous_insn (rtx);
1566 extern rtx next_insn (rtx);
1567 extern rtx prev_nonnote_insn (rtx);
1568 extern rtx next_nonnote_insn (rtx);
1569 extern rtx prev_real_insn (rtx);
1570 extern rtx next_real_insn (rtx);
1571 extern rtx prev_active_insn (rtx);
1572 extern rtx next_active_insn (rtx);
1573 extern int active_insn_p (rtx);
1574 extern rtx prev_label (rtx);
1575 extern rtx next_label (rtx);
1576 extern rtx skip_consecutive_labels (rtx);
1577 extern rtx next_cc0_user (rtx);
1578 extern rtx prev_cc0_setter (rtx);
1580 /* In cfglayout.c */
1581 extern int insn_line (rtx);
1582 extern const char * insn_file (rtx);
1583 extern int locator_line (int);
1584 extern const char * locator_file (int);
1585 extern int prologue_locator, epilogue_locator;
1588 extern enum rtx_code reverse_condition (enum rtx_code);
1589 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1590 extern enum rtx_code swap_condition (enum rtx_code);
1591 extern enum rtx_code unsigned_condition (enum rtx_code);
1592 extern enum rtx_code signed_condition (enum rtx_code);
1593 extern void mark_jump_label (rtx, rtx, int);
1594 extern unsigned int cleanup_barriers (void);
1597 extern bool squeeze_notes (rtx *, rtx *);
1598 extern rtx delete_related_insns (rtx);
1599 extern void delete_jump (rtx);
1600 extern rtx get_label_before (rtx);
1601 extern rtx get_label_after (rtx);
1602 extern rtx follow_jumps (rtx);
1605 extern rtx *find_constant_term_loc (rtx *);
1608 extern rtx try_split (rtx, rtx, int);
1609 extern int split_branch_probability;
1611 /* In unknown file */
1612 extern rtx split_insns (rtx, rtx);
1614 /* In simplify-rtx.c */
1615 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1616 rtx, enum machine_mode);
1617 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1619 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1621 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1623 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1624 enum machine_mode, rtx, rtx, rtx);
1625 extern rtx simplify_const_relational_operation (enum rtx_code,
1626 enum machine_mode, rtx, rtx);
1627 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1628 enum machine_mode, rtx, rtx);
1629 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1630 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1632 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1633 enum machine_mode, rtx, rtx, rtx);
1634 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1635 enum machine_mode, rtx, rtx);
1636 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1638 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1640 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1641 extern rtx simplify_rtx (rtx);
1642 extern rtx avoid_constant_pool_reference (rtx);
1643 extern bool constant_pool_reference_p (rtx x);
1644 extern bool mode_signbit_p (enum machine_mode, rtx);
1647 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1651 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1653 /* Functions in rtlanal.c */
1655 /* Single set is implemented as macro for performance reasons. */
1656 #define single_set(I) (INSN_P (I) \
1657 ? (GET_CODE (PATTERN (I)) == SET \
1658 ? PATTERN (I) : single_set_1 (I)) \
1660 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1662 /* Structure used for passing data to REPLACE_LABEL. */
1663 typedef struct replace_label_data
1667 bool update_label_nuses;
1668 } replace_label_data;
1670 extern int rtx_addr_can_trap_p (rtx);
1671 extern bool nonzero_address_p (rtx);
1672 extern int rtx_unstable_p (rtx);
1673 extern int rtx_varies_p (rtx, int);
1674 extern int rtx_addr_varies_p (rtx, int);
1675 extern HOST_WIDE_INT get_integer_term (rtx);
1676 extern rtx get_related_value (rtx);
1677 extern int reg_mentioned_p (rtx, rtx);
1678 extern int count_occurrences (rtx, rtx, int);
1679 extern int reg_referenced_p (rtx, rtx);
1680 extern int reg_used_between_p (rtx, rtx, rtx);
1681 extern int reg_set_between_p (rtx, rtx, rtx);
1682 extern int commutative_operand_precedence (rtx);
1683 extern int swap_commutative_operands_p (rtx, rtx);
1684 extern int modified_between_p (rtx, rtx, rtx);
1685 extern int no_labels_between_p (rtx, rtx);
1686 extern int modified_in_p (rtx, rtx);
1687 extern int reg_set_p (rtx, rtx);
1688 extern rtx single_set_2 (rtx, rtx);
1689 extern int multiple_sets (rtx);
1690 extern int set_noop_p (rtx);
1691 extern int noop_move_p (rtx);
1692 extern rtx find_last_value (rtx, rtx *, rtx, int);
1693 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1694 extern int reg_overlap_mentioned_p (rtx, rtx);
1695 extern rtx set_of (rtx, rtx);
1696 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1697 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1698 extern int dead_or_set_p (rtx, rtx);
1699 extern int dead_or_set_regno_p (rtx, unsigned int);
1700 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1701 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1702 extern rtx find_reg_equal_equiv_note (rtx);
1703 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1704 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1705 extern int pure_call_p (rtx);
1706 extern void remove_note (rtx, rtx);
1707 extern int side_effects_p (rtx);
1708 extern int volatile_refs_p (rtx);
1709 extern int volatile_insn_p (rtx);
1710 extern int may_trap_p (rtx);
1711 extern int may_trap_after_code_motion_p (rtx);
1712 extern int may_trap_or_fault_p (rtx);
1713 extern int inequality_comparisons_p (rtx);
1714 extern rtx replace_rtx (rtx, rtx, rtx);
1715 extern int replace_label (rtx *, void *);
1716 extern int rtx_referenced_p (rtx, rtx);
1717 extern bool tablejump_p (rtx, rtx *, rtx *);
1718 extern int computed_jump_p (rtx);
1719 typedef int (*rtx_function) (rtx *, void *);
1720 extern int for_each_rtx (rtx *, rtx_function, void *);
1721 extern rtx regno_use_in (unsigned int, rtx);
1722 extern int auto_inc_p (rtx);
1723 extern int in_expr_list_p (rtx, rtx);
1724 extern void remove_node_from_expr_list (rtx, rtx *);
1725 extern int loc_mentioned_in_p (rtx *, rtx);
1726 extern rtx find_first_parameter_load (rtx, rtx);
1727 extern bool keep_with_call_p (rtx);
1728 extern bool label_is_jump_target_p (rtx, rtx);
1729 extern int insn_rtx_cost (rtx);
1731 /* Given an insn and condition, return a canonical description of
1732 the test being made. */
1733 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1735 /* Given a JUMP_INSN, return a canonical description of the test
1737 extern rtx get_condition (rtx, rtx *, int, int);
1742 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1746 void free_EXPR_LIST_list (rtx *);
1747 void free_INSN_LIST_list (rtx *);
1748 void free_EXPR_LIST_node (rtx);
1749 void free_INSN_LIST_node (rtx);
1750 rtx alloc_INSN_LIST (rtx, rtx);
1751 rtx alloc_EXPR_LIST (int, rtx, rtx);
1752 void free_DEPS_LIST_list (rtx *);
1753 rtx alloc_DEPS_LIST (rtx, rtx, int);
1754 void remove_free_DEPS_LIST_elem (rtx, rtx *);
1755 void remove_free_INSN_LIST_elem (rtx, rtx *);
1756 rtx remove_list_elem (rtx, rtx *);
1757 rtx copy_DEPS_LIST_list (rtx);
1761 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1762 Always at least 3, since the combiner could put that many together
1763 and we want this to remain correct for all the remaining passes. */
1765 extern int max_parallel;
1767 /* Free up register info memory. */
1768 extern void free_reg_info (void);
1771 extern int asm_noperands (rtx);
1772 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1773 enum machine_mode *);
1775 extern enum reg_class reg_preferred_class (int);
1776 extern enum reg_class reg_alternate_class (int);
1778 extern void split_all_insns (int);
1779 extern unsigned int split_all_insns_noflow (void);
1781 #define MAX_SAVED_CONST_INT 64
1782 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1784 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1785 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1786 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1787 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1788 extern GTY(()) rtx const_true_rtx;
1790 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1792 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1793 same as VOIDmode. */
1795 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1797 /* Likewise, for the constants 1 and 2. */
1799 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1800 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1802 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1803 is used to represent the frame pointer. This is because the
1804 hard frame pointer and the automatic variables are separated by an amount
1805 that cannot be determined until after register allocation. We can assume
1806 that in this case ELIMINABLE_REGS will be defined, one action of which
1807 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1808 #ifndef HARD_FRAME_POINTER_REGNUM
1809 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1812 /* Index labels for global_rtl. */
1813 enum global_rtl_index
1819 /* For register elimination to work properly these hard_frame_pointer_rtx,
1820 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1821 the same register. */
1822 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1823 GR_ARG_POINTER = GR_FRAME_POINTER,
1825 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1826 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1828 GR_HARD_FRAME_POINTER,
1830 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1831 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1832 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1837 GR_VIRTUAL_INCOMING_ARGS,
1838 GR_VIRTUAL_STACK_ARGS,
1839 GR_VIRTUAL_STACK_DYNAMIC,
1840 GR_VIRTUAL_OUTGOING_ARGS,
1846 /* Pointers to standard pieces of rtx are stored here. */
1847 extern GTY(()) rtx global_rtl[GR_MAX];
1849 /* Standard pieces of rtx, to be substituted directly into things. */
1850 #define pc_rtx (global_rtl[GR_PC])
1851 #define cc0_rtx (global_rtl[GR_CC0])
1853 /* All references to certain hard regs, except those created
1854 by allocating pseudo regs into them (when that's possible),
1855 go through these unique rtx objects. */
1856 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1857 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1858 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1859 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1861 extern GTY(()) rtx pic_offset_table_rtx;
1862 extern GTY(()) rtx static_chain_rtx;
1863 extern GTY(()) rtx static_chain_incoming_rtx;
1864 extern GTY(()) rtx return_address_pointer_rtx;
1866 /* Include the RTL generation functions. */
1868 #ifndef GENERATOR_FILE
1870 #ifndef USE_MAPPED_LOCATION
1871 #undef gen_rtx_ASM_OPERANDS
1872 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1873 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1877 /* There are some RTL codes that require special attention; the
1878 generation functions included above do the raw handling. If you
1879 add to this list, modify special_rtx in gengenrtl.c as well. */
1881 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1882 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1883 extern rtx gen_raw_REG (enum machine_mode, int);
1884 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1885 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1886 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1888 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1890 /* Virtual registers are used during RTL generation to refer to locations into
1891 the stack frame when the actual location isn't known until RTL generation
1892 is complete. The routine instantiate_virtual_regs replaces these with
1893 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1896 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1898 /* This points to the first word of the incoming arguments passed on the stack,
1899 either by the caller or by the callee when pretending it was passed by the
1902 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1904 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1906 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1907 variable on the stack. Otherwise, it points to the first variable on
1910 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1912 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1914 /* This points to the location of dynamically-allocated memory on the stack
1915 immediately after the stack pointer has been adjusted by the amount
1918 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1920 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1922 /* This points to the location in the stack at which outgoing arguments should
1923 be written when the stack is pre-pushed (arguments pushed using push
1924 insns always use sp). */
1926 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1928 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1930 /* This points to the Canonical Frame Address of the function. This
1931 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1932 but is calculated relative to the arg pointer for simplicity; the
1933 frame pointer nor stack pointer are necessarily fixed relative to
1934 the CFA until after reload. */
1936 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1938 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1940 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1942 /* Nonzero if REGNUM is a pointer into the stack frame. */
1943 #define REGNO_PTR_FRAME_P(REGNUM) \
1944 ((REGNUM) == STACK_POINTER_REGNUM \
1945 || (REGNUM) == FRAME_POINTER_REGNUM \
1946 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1947 || (REGNUM) == ARG_POINTER_REGNUM \
1948 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1949 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1951 /* REGNUM never really appearing in the INSN stream. */
1952 #define INVALID_REGNUM (~(unsigned int) 0)
1954 extern rtx output_constant_def (tree, int);
1955 extern rtx lookup_constant_def (tree);
1957 /* Nonzero after the second flow pass has completed.
1958 Set to 1 or 0 by toplev.c */
1959 extern int flow2_completed;
1961 /* Nonzero after end of reload pass.
1962 Set to 1 or 0 by reload1.c. */
1964 extern int reload_completed;
1966 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1967 extern int epilogue_completed;
1969 /* Set to 1 while reload_as_needed is operating.
1970 Required by some machines to handle any generated moves differently. */
1972 extern int reload_in_progress;
1975 /* Nonzero after end of regstack pass.
1976 Set to 1 or 0 by reg-stack.c. */
1977 extern int regstack_completed;
1980 /* If this is nonzero, we do not bother generating VOLATILE
1981 around volatile memory references, and we are willing to
1982 output indirect addresses. If cse is to follow, we reject
1983 indirect addresses so a useful potential cse is generated;
1984 if it is used only once, instruction combination will produce
1985 the same indirect address eventually. */
1986 extern int cse_not_expected;
1988 /* Set to nonzero before life analysis to indicate that it is unsafe to
1989 generate any new pseudo registers. */
1990 extern int no_new_pseudos;
1992 /* Translates rtx code to tree code, for those codes needed by
1993 REAL_ARITHMETIC. The function returns an int because the caller may not
1994 know what `enum tree_code' means. */
1996 extern int rtx_to_tree_code (enum rtx_code);
1999 extern int delete_trivially_dead_insns (rtx, int);
2000 extern int cse_main (rtx, int);
2001 extern int exp_equiv_p (rtx, rtx, int, bool);
2002 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
2005 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2006 extern int condjump_p (rtx);
2007 extern int any_condjump_p (rtx);
2008 extern int any_uncondjump_p (rtx);
2009 extern rtx pc_set (rtx);
2010 extern rtx condjump_label (rtx);
2011 extern int simplejump_p (rtx);
2012 extern int returnjump_p (rtx);
2013 extern int onlyjump_p (rtx);
2014 extern int only_sets_cc0_p (rtx);
2015 extern int sets_cc0_p (rtx);
2016 extern int invert_jump_1 (rtx, rtx);
2017 extern int invert_jump (rtx, rtx, int);
2018 extern int rtx_renumbered_equal_p (rtx, rtx);
2019 extern int true_regnum (rtx);
2020 extern unsigned int reg_or_subregno (rtx);
2021 extern int redirect_jump_1 (rtx, rtx);
2022 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2023 extern int redirect_jump (rtx, rtx, int);
2024 extern void rebuild_jump_labels (rtx);
2025 extern rtx reversed_comparison (rtx, enum machine_mode);
2026 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2027 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2029 extern void delete_for_peephole (rtx, rtx);
2030 extern int condjump_in_parallel_p (rtx);
2032 /* In emit-rtl.c. */
2033 extern int max_reg_num (void);
2034 extern int max_label_num (void);
2035 extern int get_first_label_num (void);
2036 extern void maybe_set_first_label_num (rtx);
2037 extern void delete_insns_since (rtx);
2038 extern void mark_reg_pointer (rtx, int);
2039 extern void mark_user_reg (rtx);
2040 extern void reset_used_flags (rtx);
2041 extern void set_used_flags (rtx);
2042 extern void reorder_insns (rtx, rtx, rtx);
2043 extern void reorder_insns_nobb (rtx, rtx, rtx);
2044 extern int get_max_uid (void);
2045 extern int in_sequence_p (void);
2046 extern void force_next_line_note (void);
2047 extern void init_emit (void);
2048 extern void init_emit_once (int);
2049 extern void push_topmost_sequence (void);
2050 extern void pop_topmost_sequence (void);
2051 extern void set_new_first_and_last_insn (rtx, rtx);
2052 extern unsigned int unshare_all_rtl (void);
2053 extern void unshare_all_rtl_again (rtx);
2054 extern void unshare_all_rtl_in_chain (rtx);
2055 extern void verify_rtl_sharing (void);
2056 extern void set_first_insn (rtx);
2057 extern void set_last_insn (rtx);
2058 extern void link_cc0_insns (rtx);
2059 extern void add_insn (rtx);
2060 extern void add_insn_before (rtx, rtx);
2061 extern void add_insn_after (rtx, rtx);
2062 extern void remove_insn (rtx);
2063 extern rtx emit (rtx);
2064 extern void renumber_insns (void);
2065 extern rtx delete_insn (rtx);
2066 extern rtx entry_of_function (void);
2067 extern void emit_insn_at_entry (rtx);
2068 extern void delete_insn_chain (rtx, rtx);
2069 extern rtx unlink_insn_chain (rtx, rtx);
2070 extern rtx delete_insn_and_edges (rtx);
2071 extern void delete_insn_chain_and_edges (rtx, rtx);
2072 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2073 extern rtx gen_const_mem (enum machine_mode, rtx);
2074 extern rtx gen_frame_mem (enum machine_mode, rtx);
2075 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2076 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2080 extern unsigned int extended_count (rtx, enum machine_mode, int);
2081 extern rtx remove_death (unsigned int, rtx);
2082 extern void dump_combine_stats (FILE *);
2083 extern void dump_combine_total_stats (FILE *);
2085 /* In sched-vis.c. */
2086 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2087 extern void dump_insn_slim (FILE *f, rtx x);
2088 extern void debug_insn_slim (rtx x);
2090 /* In sched-rgn.c. */
2091 extern void schedule_insns (void);
2093 /* In sched-ebb.c. */
2094 extern void schedule_ebbs (void);
2096 /* In haifa-sched.c. */
2097 extern void fix_sched_param (const char *, const char *);
2099 /* In print-rtl.c */
2100 extern const char *print_rtx_head;
2101 extern void debug_rtx (rtx);
2102 extern void debug_rtx_list (rtx, int);
2103 extern void debug_rtx_range (rtx, rtx);
2104 extern rtx debug_rtx_find (rtx, int);
2105 extern void print_mem_expr (FILE *, tree);
2106 extern void print_rtl (FILE *, rtx);
2107 extern void print_simple_rtl (FILE *, rtx);
2108 extern int print_rtl_single (FILE *, rtx);
2109 extern void print_inline_rtx (FILE *, rtx, int);
2112 extern void branch_target_load_optimize (bool);
2115 extern void reposition_prologue_and_epilogue_notes (rtx);
2116 extern void thread_prologue_and_epilogue_insns (rtx);
2117 extern int prologue_epilogue_contains (rtx);
2118 extern int sibcall_epilogue_contains (rtx);
2119 extern void mark_temp_addr_taken (rtx);
2120 extern void update_temp_slot_address (rtx, rtx);
2123 extern void expand_null_return (void);
2124 extern void expand_naked_return (void);
2125 extern void emit_jump (rtx);
2128 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2132 extern void delete_dead_jumptables (void);
2133 extern void print_rtl_with_bb (FILE *, rtx);
2134 extern void dump_flow_info (FILE *, int);
2137 extern void init_expmed (void);
2138 extern void expand_inc (rtx, rtx);
2139 extern void expand_dec (rtx, rtx);
2142 extern bool can_copy_p (enum machine_mode);
2143 extern rtx fis_get_condition (rtx);
2146 extern void mark_elimination (int, int);
2147 extern void dump_global_regs (FILE *);
2149 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2150 extern void retry_global_alloc (int, HARD_REG_SET);
2152 extern void build_insn_chain (rtx);
2155 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2156 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2157 extern void globalize_reg (int);
2158 extern void init_reg_modes_once (void);
2159 extern void init_regs (void);
2160 extern void init_fake_stack_mems (void);
2161 extern void init_reg_sets (void);
2162 extern void regclass_init (void);
2163 extern void regclass (rtx, int);
2164 extern void reg_scan (rtx, unsigned int);
2165 extern void fix_register (const char *, int, int);
2166 extern void init_subregs_of_mode (void);
2167 extern void record_subregs_of_mode (rtx);
2169 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2170 enum machine_mode, unsigned int);
2172 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2176 extern void dbr_schedule (rtx);
2178 /* In local-alloc.c */
2179 extern void dump_local_alloc (FILE *);
2182 extern int function_invariant_p (rtx);
2190 LCT_CONST_MAKE_BLOCK = 3,
2191 LCT_PURE_MAKE_BLOCK = 4,
2194 LCT_RETURNS_TWICE = 7
2197 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2199 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2200 enum machine_mode, int, ...);
2203 extern void init_varasm_once (void);
2204 extern enum tls_model decl_default_tls_model (tree);
2207 extern void traverse_md_constants (int (*) (void **, void *), void *);
2208 struct md_constant { char *name, *value; };
2211 extern int read_skip_spaces (FILE *);
2212 extern bool read_rtx (FILE *, rtx *, int *);
2213 extern void copy_rtx_ptr_loc (const void *, const void *);
2214 extern void print_rtx_ptr_loc (const void *);
2215 extern const char *join_c_conditions (const char *, const char *);
2216 extern void print_c_condition (const char *);
2217 extern const char *read_rtx_filename;
2218 extern int read_rtx_lineno;
2221 extern void clear_reg_alias_info (rtx);
2222 extern rtx canon_rtx (rtx);
2223 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2224 extern rtx get_addr (rtx);
2225 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2227 extern int read_dependence (rtx, rtx);
2228 extern int anti_dependence (rtx, rtx);
2229 extern int output_dependence (rtx, rtx);
2230 extern void init_alias_once (void);
2231 extern void init_alias_analysis (void);
2232 extern void end_alias_analysis (void);
2233 extern bool memory_modified_in_insn_p (rtx, rtx);
2234 extern rtx find_base_term (rtx);
2235 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2236 extern rtx get_reg_known_value (unsigned int);
2237 extern bool get_reg_known_equiv_p (unsigned int);
2240 extern int stack_regs_mentioned (rtx insn);
2244 extern GTY(()) rtx stack_limit_rtx;
2247 extern void invert_br_probabilities (rtx);
2248 extern bool expensive_function_p (int);
2249 /* In cfgexpand.c */
2250 extern void add_reg_br_prob_note (rtx last, int probability);
2252 extern void tracer (unsigned int);
2254 /* In var-tracking.c */
2255 extern unsigned int variable_tracking_main (void);
2257 /* In stor-layout.c. */
2258 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2261 /* In loop-unswitch.c */
2262 extern rtx reversed_condition (rtx);
2263 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2266 extern rtx canon_condition (rtx);
2267 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2271 rtx (*gen_lowpart) (enum machine_mode, rtx);
2272 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2273 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2274 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2275 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2276 unsigned int, unsigned int *);
2277 bool (*reg_truncated_to_mode) (enum machine_mode, rtx);
2279 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2282 /* Each pass can provide its own. */
2283 extern struct rtl_hooks rtl_hooks;
2285 /* ... but then it has to restore these. */
2286 extern const struct rtl_hooks general_rtl_hooks;
2288 /* Keep this for the nonce. */
2289 #define gen_lowpart rtl_hooks.gen_lowpart
2291 #endif /* ! GCC_RTL_H */
OSDN Git Service
