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_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
854 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
856 /* In a NOTE that is a line number, this is the line number.
857 Other kinds of NOTEs are identified by negative numbers here. */
858 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
860 /* Nonzero if INSN is a note marking the beginning of a basic block. */
861 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
862 (GET_CODE (INSN) == NOTE \
863 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
865 /* Variable declaration and the location of a variable. */
866 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
868 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
871 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
872 that are not line numbers. These codes are all negative.
874 Notice that we do not try to use zero here for any of
875 the special note codes because sometimes the source line
876 actually can be zero! This happens (for example) when we
877 are generating code for the per-translation-unit constructor
878 and destructor routines for some C++ translation unit. */
882 /* Keep all of these numbers negative. Adjust as needed. */
883 NOTE_INSN_BIAS = -100,
885 #define DEF_INSN_NOTE(NAME) NAME,
886 #include "insn-notes.def"
892 /* Names for NOTE insn's other than line numbers. */
894 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
895 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
896 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
898 /* The name of a label, in case it corresponds to an explicit label
899 in the input source code. */
900 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
902 /* In jump.c, each label contains a count of the number
903 of LABEL_REFs that point at it, so unused labels can be deleted. */
904 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
906 /* APPLE LOCAL begin for-fsf-4_4 3274130 5295549 */ \
907 /* The alignment of the label, as the log-base-2 of the alignment in bytes. */
908 #define LABEL_ALIGN_LOG(RTX) (XCUINT (RTX, 8, CODE_LABEL) & 0xFF)
909 /* The maximum number of bytes to skip to achieve that alignment. */
910 #define LABEL_MAX_SKIP(RTX) (XCUINT (RTX, 8, CODE_LABEL) >> 8)
911 #define SET_LABEL_ALIGN(RTX, ALIGN, MAX_SKIP) \
912 (XCUINT (RTX, 8, CODE_LABEL) = (ALIGN) | ((MAX_SKIP) << 8))
914 /* APPLE LOCAL end for-fsf-4_4 3274130 5295549 */ \
915 /* Labels carry a two-bit field composed of the ->jump and ->call
916 bits. This field indicates whether the label is an alternate
917 entry point, and if so, what kind. */
920 LABEL_NORMAL = 0, /* ordinary label */
921 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
922 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
923 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
926 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
928 /* Retrieve the kind of LABEL. */
929 #define LABEL_KIND(LABEL) __extension__ \
930 ({ rtx const _label = (LABEL); \
931 if (GET_CODE (_label) != CODE_LABEL) \
932 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
934 (enum label_kind) ((_label->jump << 1) | _label->call); })
936 /* Set the kind of LABEL. */
937 #define SET_LABEL_KIND(LABEL, KIND) do { \
938 rtx _label = (LABEL); \
939 unsigned int _kind = (KIND); \
940 if (GET_CODE (_label) != CODE_LABEL) \
941 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
943 _label->jump = ((_kind >> 1) & 1); \
944 _label->call = (_kind & 1); \
949 /* Retrieve the kind of LABEL. */
950 #define LABEL_KIND(LABEL) \
951 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
953 /* Set the kind of LABEL. */
954 #define SET_LABEL_KIND(LABEL, KIND) do { \
955 rtx _label = (LABEL); \
956 unsigned int _kind = (KIND); \
957 _label->jump = ((_kind >> 1) & 1); \
958 _label->call = (_kind & 1); \
961 #endif /* rtl flag checking */
963 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
965 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
966 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
967 be decremented and possibly the label can be deleted. */
968 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
970 /* Once basic blocks are found in flow.c,
971 each CODE_LABEL starts a chain that goes through
972 all the LABEL_REFs that jump to that label.
973 The chain eventually winds up at the CODE_LABEL: it is circular. */
974 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
976 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
977 the number the register originally had; for a pseudo register turned into
978 a hard reg this will hold the old pseudo register number. */
980 #define REGNO(RTX) XCUINT (RTX, 0, REG)
981 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
983 /* 1 if RTX is a reg or parallel that is the current function's return
985 #define REG_FUNCTION_VALUE_P(RTX) \
986 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
988 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
989 #define REG_USERVAR_P(RTX) \
990 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
992 /* 1 if RTX is a reg that holds a pointer value. */
993 #define REG_POINTER(RTX) \
994 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
996 /* 1 if RTX is a mem that holds a pointer value. */
997 #define MEM_POINTER(RTX) \
998 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1000 /* 1 if the given register REG corresponds to a hard register. */
1001 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1003 /* 1 if the given register number REG_NO corresponds to a hard register. */
1004 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1006 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1007 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1008 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1010 /* For a CONST_DOUBLE:
1011 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1012 low-order word and ..._HIGH the high-order.
1013 For a float, there is a REAL_VALUE_TYPE structure, and
1014 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1015 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1016 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1017 #define CONST_DOUBLE_REAL_VALUE(r) \
1018 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1020 /* For a CONST_VECTOR, return element #n. */
1021 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1023 /* For a CONST_VECTOR, return the number of elements in a vector. */
1024 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1026 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1027 SUBREG_BYTE extracts the byte-number. */
1029 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1030 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1033 /* Return the right cost to give to an operation
1034 to make the cost of the corresponding register-to-register instruction
1035 N times that of a fast register-to-register instruction. */
1036 #define COSTS_N_INSNS(N) ((N) * 4)
1038 /* Maximum cost of an rtl expression. This value has the special meaning
1039 not to use an rtx with this cost under any circumstances. */
1040 #define MAX_COST INT_MAX
1042 extern void init_rtlanal (void);
1043 extern int rtx_cost (rtx, enum rtx_code);
1044 extern int address_cost (rtx, enum machine_mode);
1045 extern unsigned int subreg_lsb (rtx);
1046 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1048 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1049 unsigned int, enum machine_mode);
1050 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1051 unsigned int, enum machine_mode);
1052 extern unsigned int subreg_regno (rtx);
1053 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1054 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1055 extern bool constant_pool_constant_p (rtx);
1056 extern bool truncated_to_mode (enum machine_mode, rtx);
1059 /* 1 if RTX is a subreg containing a reg that is already known to be
1060 sign- or zero-extended from the mode of the subreg to the mode of
1061 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1064 When used as a LHS, is means that this extension must be done
1065 when assigning to SUBREG_REG. */
1067 #define SUBREG_PROMOTED_VAR_P(RTX) \
1068 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1070 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1072 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1074 _rtx->volatil = 1; \
1076 _rtx->volatil = 0; \
1077 _rtx->unchanging = (VAL); \
1080 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1081 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1082 ? -1 : (RTX)->unchanging)
1084 /* Access various components of an ASM_OPERANDS rtx. */
1086 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1087 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1088 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1089 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1090 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1091 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1092 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1093 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1094 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1095 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1096 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1097 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1098 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1099 #ifdef USE_MAPPED_LOCATION
1100 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1102 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1103 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1106 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1107 #define MEM_READONLY_P(RTX) \
1108 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1110 /* 1 if RTX is a mem and we should keep the alias set for this mem
1111 unchanged when we access a component. Set to 1, or example, when we
1112 are already in a non-addressable component of an aggregate. */
1113 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1114 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1116 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1117 #define MEM_VOLATILE_P(RTX) \
1118 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1119 ASM_INPUT)->volatil)
1121 /* 1 if RTX is a mem that refers to an aggregate, either to the
1122 aggregate itself or to a field of the aggregate. If zero, RTX may
1123 or may not be such a reference. */
1124 #define MEM_IN_STRUCT_P(RTX) \
1125 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1127 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1128 not refer to a scalar. */
1129 #define MEM_SCALAR_P(RTX) \
1130 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1132 /* 1 if RTX is a mem that cannot trap. */
1133 #define MEM_NOTRAP_P(RTX) \
1134 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1136 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1137 RTX. Otherwise, vice versa. Use this macro only when you are
1138 *sure* that you know that the MEM is in a structure, or is a
1139 scalar. VAL is evaluated only once. */
1140 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1144 MEM_IN_STRUCT_P (RTX) = 1; \
1145 MEM_SCALAR_P (RTX) = 0; \
1149 MEM_IN_STRUCT_P (RTX) = 0; \
1150 MEM_SCALAR_P (RTX) = 1; \
1154 /* The memory attribute block. We provide access macros for each value
1155 in the block and provide defaults if none specified. */
1156 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1158 /* The register attribute block. We provide access macros for each value
1159 in the block and provide defaults if none specified. */
1160 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1162 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1163 set, and may alias anything. Otherwise, the MEM can only alias
1164 MEMs in a conflicting alias set. This value is set in a
1165 language-dependent manner in the front-end, and should not be
1166 altered in the back-end. These set numbers are tested with
1167 alias_sets_conflict_p. */
1168 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1170 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1171 refer to part of a DECL. It may also be a COMPONENT_REF. */
1172 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1174 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1175 RTX that is always a CONST_INT. */
1176 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1178 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1179 is always a CONST_INT. */
1180 #define MEM_SIZE(RTX) \
1181 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1182 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1185 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1186 mode as a default when STRICT_ALIGNMENT, but not if not. */
1187 #define MEM_ALIGN(RTX) \
1188 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1189 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1190 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1192 /* For a REG rtx, the decl it is known to refer to, if it is known to
1193 refer to part of a DECL. */
1194 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1196 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1198 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1200 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1201 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1202 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1203 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1204 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1205 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1206 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1207 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1208 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1210 /* 1 if RTX is a label_ref for a nonlocal label. */
1211 /* Likewise in an expr_list for a reg_label note. */
1212 #define LABEL_REF_NONLOCAL_P(RTX) \
1213 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1214 REG_LABEL)->volatil)
1216 /* 1 if RTX is a code_label that should always be considered to be needed. */
1217 #define LABEL_PRESERVE_P(RTX) \
1218 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1220 /* During sched, 1 if RTX is an insn that must be scheduled together
1221 with the preceding insn. */
1222 #define SCHED_GROUP_P(RTX) \
1223 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1226 /* For a SET rtx, SET_DEST is the place that is set
1227 and SET_SRC is the value it is set to. */
1228 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1229 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1230 #define SET_IS_RETURN_P(RTX) \
1231 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1233 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1234 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1235 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1237 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1238 conditionally executing the code on, COND_EXEC_CODE is the code
1239 to execute if the condition is true. */
1240 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1241 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1243 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1245 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1246 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1248 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1249 tree constant pool. This information is private to varasm.c. */
1250 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1251 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1252 (RTX), SYMBOL_REF)->frame_related)
1254 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1255 #define SYMBOL_REF_FLAG(RTX) \
1256 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1258 /* 1 if RTX is a symbol_ref that has been the library function in
1259 emit_library_call. */
1260 #define SYMBOL_REF_USED(RTX) \
1261 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1263 /* 1 if RTX is a symbol_ref for a weak symbol. */
1264 #define SYMBOL_REF_WEAK(RTX) \
1265 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1267 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1268 SYMBOL_REF_CONSTANT. */
1269 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1271 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1273 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1274 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1276 /* The tree (decl or constant) associated with the symbol, or null. */
1277 #define SYMBOL_REF_DECL(RTX) \
1278 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1280 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1281 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1282 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1284 /* The rtx constant pool entry for a symbol, or null. */
1285 #define SYMBOL_REF_CONSTANT(RTX) \
1286 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1288 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1289 information derivable from the tree decl associated with this symbol.
1290 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1291 decl. In some cases this is a bug. But beyond that, it's nice to cache
1292 this information to avoid recomputing it. Finally, this allows space for
1293 the target to store more than one bit of information, as with
1295 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1297 /* These flags are common enough to be defined for all targets. They
1298 are computed by the default version of targetm.encode_section_info. */
1300 /* Set if this symbol is a function. */
1301 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1302 #define SYMBOL_REF_FUNCTION_P(RTX) \
1303 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1304 /* Set if targetm.binds_local_p is true. */
1305 #define SYMBOL_FLAG_LOCAL (1 << 1)
1306 #define SYMBOL_REF_LOCAL_P(RTX) \
1307 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1308 /* Set if targetm.in_small_data_p is true. */
1309 #define SYMBOL_FLAG_SMALL (1 << 2)
1310 #define SYMBOL_REF_SMALL_P(RTX) \
1311 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1312 /* The three-bit field at [5:3] is true for TLS variables; use
1313 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1314 #define SYMBOL_FLAG_TLS_SHIFT 3
1315 #define SYMBOL_REF_TLS_MODEL(RTX) \
1316 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1317 /* Set if this symbol is not defined in this translation unit. */
1318 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1319 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1320 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1321 /* Set if this symbol has a block_symbol structure associated with it. */
1322 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1323 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1324 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1325 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1326 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1327 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1328 #define SYMBOL_REF_ANCHOR_P(RTX) \
1329 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1331 /* Subsequent bits are available for the target to use. */
1332 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1333 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1335 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1336 structure to which the symbol belongs, or NULL if it has not been
1337 assigned a block. */
1338 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1340 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1341 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1342 RTX has not yet been assigned to a block, or it has not been given an
1343 offset within that block. */
1344 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1346 /* Define a macro to look for REG_INC notes,
1347 but save time on machines where they never exist. */
1349 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1350 #define FIND_REG_INC_NOTE(INSN, REG) \
1351 ((REG) != NULL_RTX && REG_P ((REG)) \
1352 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1353 : find_reg_note ((INSN), REG_INC, (REG)))
1355 #define FIND_REG_INC_NOTE(INSN, REG) 0
1358 /* Indicate whether the machine has any sort of auto increment addressing.
1359 If not, we can avoid checking for REG_INC notes. */
1361 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1362 #define AUTO_INC_DEC
1365 #ifndef HAVE_PRE_INCREMENT
1366 #define HAVE_PRE_INCREMENT 0
1369 #ifndef HAVE_PRE_DECREMENT
1370 #define HAVE_PRE_DECREMENT 0
1373 #ifndef HAVE_POST_INCREMENT
1374 #define HAVE_POST_INCREMENT 0
1377 #ifndef HAVE_POST_DECREMENT
1378 #define HAVE_POST_DECREMENT 0
1381 #ifndef HAVE_POST_MODIFY_DISP
1382 #define HAVE_POST_MODIFY_DISP 0
1385 #ifndef HAVE_POST_MODIFY_REG
1386 #define HAVE_POST_MODIFY_REG 0
1389 #ifndef HAVE_PRE_MODIFY_DISP
1390 #define HAVE_PRE_MODIFY_DISP 0
1393 #ifndef HAVE_PRE_MODIFY_REG
1394 #define HAVE_PRE_MODIFY_REG 0
1398 /* Some architectures do not have complete pre/post increment/decrement
1399 instruction sets, or only move some modes efficiently. These macros
1400 allow us to tune autoincrement generation. */
1402 #ifndef USE_LOAD_POST_INCREMENT
1403 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1406 #ifndef USE_LOAD_POST_DECREMENT
1407 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1410 #ifndef USE_LOAD_PRE_INCREMENT
1411 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1414 #ifndef USE_LOAD_PRE_DECREMENT
1415 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1418 #ifndef USE_STORE_POST_INCREMENT
1419 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1422 #ifndef USE_STORE_POST_DECREMENT
1423 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1426 #ifndef USE_STORE_PRE_INCREMENT
1427 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1430 #ifndef USE_STORE_PRE_DECREMENT
1431 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1434 /* Nonzero when we are generating CONCATs. */
1435 extern int generating_concat_p;
1437 /* Nonzero when we are expanding trees to RTL. */
1438 extern int currently_expanding_to_rtl;
1440 /* Generally useful functions. */
1443 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1446 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1449 extern void set_stack_check_libfunc (rtx);
1450 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1451 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1454 extern rtvec gen_rtvec (int, ...);
1455 extern rtx copy_insn_1 (rtx);
1456 extern rtx copy_insn (rtx);
1457 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1458 extern rtx emit_copy_of_insn_after (rtx, rtx);
1459 extern void set_reg_attrs_from_mem (rtx, rtx);
1460 extern void set_mem_attrs_from_reg (rtx, rtx);
1461 extern void set_reg_attrs_for_parm (rtx, rtx);
1462 extern int mem_expr_equal_p (tree, tree);
1465 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1466 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1468 extern rtvec rtvec_alloc (int);
1469 extern rtx copy_rtx (rtx);
1470 extern void dump_rtx_statistics (void);
1473 extern rtx copy_rtx_if_shared (rtx);
1476 extern unsigned int rtx_size (rtx);
1477 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1478 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1479 extern int rtx_equal_p (rtx, rtx);
1482 extern rtvec gen_rtvec_v (int, rtx *);
1483 extern rtx gen_reg_rtx (enum machine_mode);
1484 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1485 extern rtx gen_label_rtx (void);
1486 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1489 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1492 extern rtx gen_highpart (enum machine_mode, rtx);
1493 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1494 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1497 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1498 extern int subreg_lowpart_p (rtx);
1499 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1501 extern unsigned int subreg_highpart_offset (enum machine_mode,
1503 extern rtx make_safe_from (rtx, rtx);
1504 extern rtx convert_memory_address (enum machine_mode, rtx);
1505 extern rtx get_insns (void);
1506 extern const char *get_insn_name (int);
1507 extern rtx get_last_insn (void);
1508 extern rtx get_last_insn_anywhere (void);
1509 extern rtx get_first_nonnote_insn (void);
1510 extern rtx get_last_nonnote_insn (void);
1511 extern void start_sequence (void);
1512 extern void push_to_sequence (rtx);
1513 extern void end_sequence (void);
1514 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1519 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1522 extern rtx force_const_mem (enum machine_mode, rtx);
1527 extern rtx get_pool_constant (rtx);
1528 extern rtx get_pool_constant_mark (rtx, bool *);
1529 extern enum machine_mode get_pool_mode (rtx);
1530 extern rtx simplify_subtraction (rtx);
1533 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1534 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1535 extern rtx assign_stack_temp_for_type (enum machine_mode,
1536 HOST_WIDE_INT, int, tree);
1537 extern rtx assign_temp (tree, int, int, int);
1540 extern rtx emit_insn_before (rtx, rtx);
1541 extern rtx emit_insn_before_noloc (rtx, rtx);
1542 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1543 extern rtx emit_jump_insn_before (rtx, rtx);
1544 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1545 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1546 extern rtx emit_call_insn_before (rtx, rtx);
1547 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1548 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1549 extern rtx emit_barrier_before (rtx);
1550 extern rtx emit_label_before (rtx, rtx);
1551 extern rtx emit_note_before (int, rtx);
1552 extern rtx emit_insn_after (rtx, rtx);
1553 extern rtx emit_insn_after_noloc (rtx, rtx);
1554 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1555 extern rtx emit_jump_insn_after (rtx, rtx);
1556 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1557 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1558 extern rtx emit_call_insn_after (rtx, rtx);
1559 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1560 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1561 extern rtx emit_barrier_after (rtx);
1562 extern rtx emit_label_after (rtx, rtx);
1563 extern rtx emit_note_after (int, rtx);
1564 extern rtx emit_note_copy_after (rtx, rtx);
1565 extern rtx emit_insn (rtx);
1566 extern rtx emit_jump_insn (rtx);
1567 extern rtx emit_call_insn (rtx);
1568 extern rtx emit_label (rtx);
1569 extern rtx emit_barrier (void);
1570 extern rtx emit_note (int);
1571 extern rtx emit_note_copy (rtx);
1572 extern rtx emit_line_note (location_t);
1573 extern rtx make_insn_raw (rtx);
1574 extern rtx make_jump_insn_raw (rtx);
1575 extern void add_function_usage_to (rtx, rtx);
1576 extern rtx last_call_insn (void);
1577 extern rtx previous_insn (rtx);
1578 extern rtx next_insn (rtx);
1579 extern rtx prev_nonnote_insn (rtx);
1580 extern rtx next_nonnote_insn (rtx);
1581 extern rtx prev_real_insn (rtx);
1582 extern rtx next_real_insn (rtx);
1583 extern rtx prev_active_insn (rtx);
1584 extern rtx next_active_insn (rtx);
1585 extern int active_insn_p (rtx);
1586 extern rtx prev_label (rtx);
1587 extern rtx next_label (rtx);
1588 extern rtx skip_consecutive_labels (rtx);
1589 extern rtx next_cc0_user (rtx);
1590 extern rtx prev_cc0_setter (rtx);
1592 /* In cfglayout.c */
1593 extern int insn_line (rtx);
1594 extern const char * insn_file (rtx);
1595 extern int locator_line (int);
1596 extern const char * locator_file (int);
1597 extern int prologue_locator, epilogue_locator;
1600 extern enum rtx_code reverse_condition (enum rtx_code);
1601 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1602 extern enum rtx_code swap_condition (enum rtx_code);
1603 extern enum rtx_code unsigned_condition (enum rtx_code);
1604 extern enum rtx_code signed_condition (enum rtx_code);
1605 extern void mark_jump_label (rtx, rtx, int);
1606 extern unsigned int cleanup_barriers (void);
1609 extern bool squeeze_notes (rtx *, rtx *);
1610 extern rtx delete_related_insns (rtx);
1611 extern void delete_jump (rtx);
1612 extern rtx get_label_before (rtx);
1613 extern rtx get_label_after (rtx);
1614 extern rtx follow_jumps (rtx);
1617 extern rtx *find_constant_term_loc (rtx *);
1620 extern rtx try_split (rtx, rtx, int);
1621 extern int split_branch_probability;
1623 /* In unknown file */
1624 extern rtx split_insns (rtx, rtx);
1626 /* In simplify-rtx.c */
1627 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1628 rtx, enum machine_mode);
1629 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1631 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1633 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1635 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1636 enum machine_mode, rtx, rtx, rtx);
1637 extern rtx simplify_const_relational_operation (enum rtx_code,
1638 enum machine_mode, rtx, rtx);
1639 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1640 enum machine_mode, rtx, rtx);
1641 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1642 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1644 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1645 enum machine_mode, rtx, rtx, rtx);
1646 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1647 enum machine_mode, rtx, rtx);
1648 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1650 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1652 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1653 extern rtx simplify_rtx (rtx);
1654 extern rtx avoid_constant_pool_reference (rtx);
1655 extern bool constant_pool_reference_p (rtx x);
1656 extern bool mode_signbit_p (enum machine_mode, rtx);
1659 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1663 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1665 /* Functions in rtlanal.c */
1667 /* Single set is implemented as macro for performance reasons. */
1668 #define single_set(I) (INSN_P (I) \
1669 ? (GET_CODE (PATTERN (I)) == SET \
1670 ? PATTERN (I) : single_set_1 (I)) \
1672 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1674 /* Structure used for passing data to REPLACE_LABEL. */
1675 typedef struct replace_label_data
1679 bool update_label_nuses;
1680 } replace_label_data;
1682 extern int rtx_addr_can_trap_p (rtx);
1683 extern bool nonzero_address_p (rtx);
1684 extern int rtx_unstable_p (rtx);
1685 extern int rtx_varies_p (rtx, int);
1686 extern int rtx_addr_varies_p (rtx, int);
1687 extern HOST_WIDE_INT get_integer_term (rtx);
1688 extern rtx get_related_value (rtx);
1689 extern int reg_mentioned_p (rtx, rtx);
1690 extern int count_occurrences (rtx, rtx, int);
1691 extern int reg_referenced_p (rtx, rtx);
1692 extern int reg_used_between_p (rtx, rtx, rtx);
1693 extern int reg_set_between_p (rtx, rtx, rtx);
1694 extern int commutative_operand_precedence (rtx);
1695 extern int swap_commutative_operands_p (rtx, rtx);
1696 extern int modified_between_p (rtx, rtx, rtx);
1697 extern int no_labels_between_p (rtx, rtx);
1698 extern int modified_in_p (rtx, rtx);
1699 extern int reg_set_p (rtx, rtx);
1700 extern rtx single_set_2 (rtx, rtx);
1701 extern int multiple_sets (rtx);
1702 extern int set_noop_p (rtx);
1703 extern int noop_move_p (rtx);
1704 extern rtx find_last_value (rtx, rtx *, rtx, int);
1705 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1706 extern int reg_overlap_mentioned_p (rtx, rtx);
1707 extern rtx set_of (rtx, rtx);
1708 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1709 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1710 extern int dead_or_set_p (rtx, rtx);
1711 extern int dead_or_set_regno_p (rtx, unsigned int);
1712 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1713 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1714 extern rtx find_reg_equal_equiv_note (rtx);
1715 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1716 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1717 extern int pure_call_p (rtx);
1718 extern void remove_note (rtx, rtx);
1719 extern int side_effects_p (rtx);
1720 extern int volatile_refs_p (rtx);
1721 extern int volatile_insn_p (rtx);
1722 extern int may_trap_p (rtx);
1723 extern int may_trap_after_code_motion_p (rtx);
1724 extern int may_trap_or_fault_p (rtx);
1725 extern int inequality_comparisons_p (rtx);
1726 extern rtx replace_rtx (rtx, rtx, rtx);
1727 extern int replace_label (rtx *, void *);
1728 extern int rtx_referenced_p (rtx, rtx);
1729 extern bool tablejump_p (rtx, rtx *, rtx *);
1730 extern int computed_jump_p (rtx);
1731 typedef int (*rtx_function) (rtx *, void *);
1732 extern int for_each_rtx (rtx *, rtx_function, void *);
1733 extern rtx regno_use_in (unsigned int, rtx);
1734 extern int auto_inc_p (rtx);
1735 extern int in_expr_list_p (rtx, rtx);
1736 extern void remove_node_from_expr_list (rtx, rtx *);
1737 extern int loc_mentioned_in_p (rtx *, rtx);
1738 extern rtx find_first_parameter_load (rtx, rtx);
1739 extern bool keep_with_call_p (rtx);
1740 extern bool label_is_jump_target_p (rtx, rtx);
1741 extern int insn_rtx_cost (rtx);
1743 /* Given an insn and condition, return a canonical description of
1744 the test being made. */
1745 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1747 /* Given a JUMP_INSN, return a canonical description of the test
1749 extern rtx get_condition (rtx, rtx *, int, int);
1754 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1758 void free_EXPR_LIST_list (rtx *);
1759 void free_INSN_LIST_list (rtx *);
1760 void free_EXPR_LIST_node (rtx);
1761 void free_INSN_LIST_node (rtx);
1762 rtx alloc_INSN_LIST (rtx, rtx);
1763 rtx alloc_EXPR_LIST (int, rtx, rtx);
1764 void free_DEPS_LIST_list (rtx *);
1765 rtx alloc_DEPS_LIST (rtx, rtx, int);
1766 void remove_free_DEPS_LIST_elem (rtx, rtx *);
1767 void remove_free_INSN_LIST_elem (rtx, rtx *);
1768 rtx remove_list_elem (rtx, rtx *);
1769 rtx copy_DEPS_LIST_list (rtx);
1773 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1774 Always at least 3, since the combiner could put that many together
1775 and we want this to remain correct for all the remaining passes. */
1777 extern int max_parallel;
1779 /* Free up register info memory. */
1780 extern void free_reg_info (void);
1783 extern int asm_noperands (rtx);
1784 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1785 enum machine_mode *);
1787 extern enum reg_class reg_preferred_class (int);
1788 extern enum reg_class reg_alternate_class (int);
1790 extern void split_all_insns (int);
1791 extern unsigned int split_all_insns_noflow (void);
1793 #define MAX_SAVED_CONST_INT 64
1794 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1796 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1797 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1798 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1799 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1800 extern GTY(()) rtx const_true_rtx;
1802 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1804 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1805 same as VOIDmode. */
1807 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1809 /* Likewise, for the constants 1 and 2. */
1811 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1812 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1814 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1815 is used to represent the frame pointer. This is because the
1816 hard frame pointer and the automatic variables are separated by an amount
1817 that cannot be determined until after register allocation. We can assume
1818 that in this case ELIMINABLE_REGS will be defined, one action of which
1819 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1820 #ifndef HARD_FRAME_POINTER_REGNUM
1821 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1824 /* Index labels for global_rtl. */
1825 enum global_rtl_index
1831 /* For register elimination to work properly these hard_frame_pointer_rtx,
1832 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1833 the same register. */
1834 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1835 GR_ARG_POINTER = GR_FRAME_POINTER,
1837 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1838 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1840 GR_HARD_FRAME_POINTER,
1842 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1843 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1844 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1849 GR_VIRTUAL_INCOMING_ARGS,
1850 GR_VIRTUAL_STACK_ARGS,
1851 GR_VIRTUAL_STACK_DYNAMIC,
1852 GR_VIRTUAL_OUTGOING_ARGS,
1858 /* Pointers to standard pieces of rtx are stored here. */
1859 extern GTY(()) rtx global_rtl[GR_MAX];
1861 /* Standard pieces of rtx, to be substituted directly into things. */
1862 #define pc_rtx (global_rtl[GR_PC])
1863 #define cc0_rtx (global_rtl[GR_CC0])
1865 /* All references to certain hard regs, except those created
1866 by allocating pseudo regs into them (when that's possible),
1867 go through these unique rtx objects. */
1868 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1869 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1870 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1871 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1873 extern GTY(()) rtx pic_offset_table_rtx;
1874 extern GTY(()) rtx static_chain_rtx;
1875 extern GTY(()) rtx static_chain_incoming_rtx;
1876 extern GTY(()) rtx return_address_pointer_rtx;
1878 /* Include the RTL generation functions. */
1880 #ifndef GENERATOR_FILE
1882 #ifndef USE_MAPPED_LOCATION
1883 #undef gen_rtx_ASM_OPERANDS
1884 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1885 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1889 /* There are some RTL codes that require special attention; the
1890 generation functions included above do the raw handling. If you
1891 add to this list, modify special_rtx in gengenrtl.c as well. */
1893 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1894 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1895 extern rtx gen_raw_REG (enum machine_mode, int);
1896 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1897 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1898 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1900 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1902 /* Virtual registers are used during RTL generation to refer to locations into
1903 the stack frame when the actual location isn't known until RTL generation
1904 is complete. The routine instantiate_virtual_regs replaces these with
1905 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1908 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1910 /* This points to the first word of the incoming arguments passed on the stack,
1911 either by the caller or by the callee when pretending it was passed by the
1914 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1916 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1918 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1919 variable on the stack. Otherwise, it points to the first variable on
1922 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1924 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1926 /* This points to the location of dynamically-allocated memory on the stack
1927 immediately after the stack pointer has been adjusted by the amount
1930 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1932 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1934 /* This points to the location in the stack at which outgoing arguments should
1935 be written when the stack is pre-pushed (arguments pushed using push
1936 insns always use sp). */
1938 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1940 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1942 /* This points to the Canonical Frame Address of the function. This
1943 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1944 but is calculated relative to the arg pointer for simplicity; the
1945 frame pointer nor stack pointer are necessarily fixed relative to
1946 the CFA until after reload. */
1948 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1950 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1952 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1954 /* Nonzero if REGNUM is a pointer into the stack frame. */
1955 #define REGNO_PTR_FRAME_P(REGNUM) \
1956 ((REGNUM) == STACK_POINTER_REGNUM \
1957 || (REGNUM) == FRAME_POINTER_REGNUM \
1958 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1959 || (REGNUM) == ARG_POINTER_REGNUM \
1960 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1961 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1963 /* REGNUM never really appearing in the INSN stream. */
1964 #define INVALID_REGNUM (~(unsigned int) 0)
1966 extern rtx output_constant_def (tree, int);
1967 extern rtx lookup_constant_def (tree);
1969 /* Nonzero after the second flow pass has completed.
1970 Set to 1 or 0 by toplev.c */
1971 extern int flow2_completed;
1973 /* Nonzero after end of reload pass.
1974 Set to 1 or 0 by reload1.c. */
1976 extern int reload_completed;
1978 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1979 extern int epilogue_completed;
1981 /* Set to 1 while reload_as_needed is operating.
1982 Required by some machines to handle any generated moves differently. */
1984 extern int reload_in_progress;
1987 /* Nonzero after end of regstack pass.
1988 Set to 1 or 0 by reg-stack.c. */
1989 extern int regstack_completed;
1992 /* If this is nonzero, we do not bother generating VOLATILE
1993 around volatile memory references, and we are willing to
1994 output indirect addresses. If cse is to follow, we reject
1995 indirect addresses so a useful potential cse is generated;
1996 if it is used only once, instruction combination will produce
1997 the same indirect address eventually. */
1998 extern int cse_not_expected;
2000 /* Set to nonzero before life analysis to indicate that it is unsafe to
2001 generate any new pseudo registers. */
2002 extern int no_new_pseudos;
2004 /* Translates rtx code to tree code, for those codes needed by
2005 REAL_ARITHMETIC. The function returns an int because the caller may not
2006 know what `enum tree_code' means. */
2008 extern int rtx_to_tree_code (enum rtx_code);
2011 extern int delete_trivially_dead_insns (rtx, int);
2012 extern int cse_main (rtx, int);
2013 extern int exp_equiv_p (rtx, rtx, int, bool);
2014 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
2017 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2018 extern int condjump_p (rtx);
2019 extern int any_condjump_p (rtx);
2020 extern int any_uncondjump_p (rtx);
2021 extern rtx pc_set (rtx);
2022 extern rtx condjump_label (rtx);
2023 extern int simplejump_p (rtx);
2024 extern int returnjump_p (rtx);
2025 extern int onlyjump_p (rtx);
2026 extern int only_sets_cc0_p (rtx);
2027 extern int sets_cc0_p (rtx);
2028 extern int invert_jump_1 (rtx, rtx);
2029 extern int invert_jump (rtx, rtx, int);
2030 extern int rtx_renumbered_equal_p (rtx, rtx);
2031 extern int true_regnum (rtx);
2032 extern unsigned int reg_or_subregno (rtx);
2033 extern int redirect_jump_1 (rtx, rtx);
2034 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2035 extern int redirect_jump (rtx, rtx, int);
2036 extern void rebuild_jump_labels (rtx);
2037 extern rtx reversed_comparison (rtx, enum machine_mode);
2038 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2039 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2041 extern void delete_for_peephole (rtx, rtx);
2042 extern int condjump_in_parallel_p (rtx);
2043 extern unsigned int purge_line_number_notes (void);
2045 /* In emit-rtl.c. */
2046 extern int max_reg_num (void);
2047 extern int max_label_num (void);
2048 extern int get_first_label_num (void);
2049 extern void maybe_set_first_label_num (rtx);
2050 extern void delete_insns_since (rtx);
2051 extern void mark_reg_pointer (rtx, int);
2052 extern void mark_user_reg (rtx);
2053 extern void reset_used_flags (rtx);
2054 extern void set_used_flags (rtx);
2055 extern void reorder_insns (rtx, rtx, rtx);
2056 extern void reorder_insns_nobb (rtx, rtx, rtx);
2057 extern int get_max_uid (void);
2058 extern int in_sequence_p (void);
2059 extern void force_next_line_note (void);
2060 extern void init_emit (void);
2061 extern void init_emit_once (int);
2062 extern void push_topmost_sequence (void);
2063 extern void pop_topmost_sequence (void);
2064 extern void set_new_first_and_last_insn (rtx, rtx);
2065 extern unsigned int unshare_all_rtl (void);
2066 extern void unshare_all_rtl_again (rtx);
2067 extern void unshare_all_rtl_in_chain (rtx);
2068 extern void verify_rtl_sharing (void);
2069 extern void set_first_insn (rtx);
2070 extern void set_last_insn (rtx);
2071 extern void link_cc0_insns (rtx);
2072 extern void add_insn (rtx);
2073 extern void add_insn_before (rtx, rtx);
2074 extern void add_insn_after (rtx, rtx);
2075 extern void remove_insn (rtx);
2076 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
2077 extern rtx emit (rtx);
2078 extern void renumber_insns (void);
2079 extern rtx delete_insn (rtx);
2080 extern rtx entry_of_function (void);
2081 extern void emit_insn_at_entry (rtx);
2082 extern void delete_insn_chain (rtx, rtx);
2083 extern rtx unlink_insn_chain (rtx, rtx);
2084 extern rtx delete_insn_and_edges (rtx);
2085 extern void delete_insn_chain_and_edges (rtx, rtx);
2086 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2087 extern rtx gen_const_mem (enum machine_mode, rtx);
2088 extern rtx gen_frame_mem (enum machine_mode, rtx);
2089 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2090 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2094 extern unsigned int extended_count (rtx, enum machine_mode, int);
2095 extern rtx remove_death (unsigned int, rtx);
2096 extern void dump_combine_stats (FILE *);
2097 extern void dump_combine_total_stats (FILE *);
2099 /* In sched-vis.c. */
2100 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2101 extern void dump_insn_slim (FILE *f, rtx x);
2102 extern void debug_insn_slim (rtx x);
2104 /* In sched-rgn.c. */
2105 extern void schedule_insns (void);
2107 /* In sched-ebb.c. */
2108 extern void schedule_ebbs (void);
2110 /* In haifa-sched.c. */
2111 extern void fix_sched_param (const char *, const char *);
2113 /* In print-rtl.c */
2114 extern const char *print_rtx_head;
2115 extern void debug_rtx (rtx);
2116 extern void debug_rtx_list (rtx, int);
2117 extern void debug_rtx_range (rtx, rtx);
2118 extern rtx debug_rtx_find (rtx, int);
2119 extern void print_mem_expr (FILE *, tree);
2120 extern void print_rtl (FILE *, rtx);
2121 extern void print_simple_rtl (FILE *, rtx);
2122 extern int print_rtl_single (FILE *, rtx);
2123 extern void print_inline_rtx (FILE *, rtx, int);
2126 extern void branch_target_load_optimize (bool);
2129 extern void reposition_prologue_and_epilogue_notes (rtx);
2130 extern void thread_prologue_and_epilogue_insns (rtx);
2131 extern int prologue_epilogue_contains (rtx);
2132 extern int sibcall_epilogue_contains (rtx);
2133 extern void mark_temp_addr_taken (rtx);
2134 extern void update_temp_slot_address (rtx, rtx);
2137 extern void expand_null_return (void);
2138 extern void expand_naked_return (void);
2139 extern void emit_jump (rtx);
2142 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2146 extern void delete_dead_jumptables (void);
2147 extern void print_rtl_with_bb (FILE *, rtx);
2148 extern void dump_flow_info (FILE *, int);
2151 extern void init_expmed (void);
2152 extern void expand_inc (rtx, rtx);
2153 extern void expand_dec (rtx, rtx);
2156 extern bool can_copy_p (enum machine_mode);
2157 extern rtx fis_get_condition (rtx);
2160 extern void mark_elimination (int, int);
2161 extern void dump_global_regs (FILE *);
2163 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2164 extern void retry_global_alloc (int, HARD_REG_SET);
2166 extern void build_insn_chain (rtx);
2169 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2170 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2171 extern void globalize_reg (int);
2172 extern void init_reg_modes_once (void);
2173 extern void init_regs (void);
2174 extern void init_fake_stack_mems (void);
2175 extern void init_reg_sets (void);
2176 extern void regclass_init (void);
2177 extern void regclass (rtx, int);
2178 extern void reg_scan (rtx, unsigned int);
2179 extern void fix_register (const char *, int, int);
2180 extern void init_subregs_of_mode (void);
2181 extern void record_subregs_of_mode (rtx);
2183 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2184 enum machine_mode, unsigned int);
2186 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2190 extern void dbr_schedule (rtx);
2192 /* In local-alloc.c */
2193 extern void dump_local_alloc (FILE *);
2196 extern int function_invariant_p (rtx);
2204 LCT_CONST_MAKE_BLOCK = 3,
2205 LCT_PURE_MAKE_BLOCK = 4,
2208 LCT_RETURNS_TWICE = 7
2211 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2213 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2214 enum machine_mode, int, ...);
2217 extern void init_varasm_once (void);
2218 extern enum tls_model decl_default_tls_model (tree);
2221 extern void traverse_md_constants (int (*) (void **, void *), void *);
2222 struct md_constant { char *name, *value; };
2225 extern int read_skip_spaces (FILE *);
2226 extern bool read_rtx (FILE *, rtx *, int *);
2227 extern void copy_rtx_ptr_loc (const void *, const void *);
2228 extern void print_rtx_ptr_loc (const void *);
2229 extern const char *join_c_conditions (const char *, const char *);
2230 extern void print_c_condition (const char *);
2231 extern const char *read_rtx_filename;
2232 extern int read_rtx_lineno;
2235 extern void clear_reg_alias_info (rtx);
2236 extern rtx canon_rtx (rtx);
2237 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2238 extern rtx get_addr (rtx);
2239 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2241 extern int read_dependence (rtx, rtx);
2242 extern int anti_dependence (rtx, rtx);
2243 extern int output_dependence (rtx, rtx);
2244 extern void init_alias_once (void);
2245 extern void init_alias_analysis (void);
2246 extern void end_alias_analysis (void);
2247 extern bool memory_modified_in_insn_p (rtx, rtx);
2248 extern rtx find_base_term (rtx);
2249 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2250 extern rtx get_reg_known_value (unsigned int);
2251 extern bool get_reg_known_equiv_p (unsigned int);
2254 extern int stack_regs_mentioned (rtx insn);
2258 extern GTY(()) rtx stack_limit_rtx;
2261 extern void invert_br_probabilities (rtx);
2262 extern bool expensive_function_p (int);
2264 extern void tracer (unsigned int);
2266 /* In var-tracking.c */
2267 extern unsigned int variable_tracking_main (void);
2269 /* In stor-layout.c. */
2270 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2273 /* In loop-unswitch.c */
2274 extern rtx reversed_condition (rtx);
2275 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2278 extern rtx canon_condition (rtx);
2279 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2283 rtx (*gen_lowpart) (enum machine_mode, rtx);
2284 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2285 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2286 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2287 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2288 unsigned int, unsigned int *);
2289 bool (*reg_truncated_to_mode) (enum machine_mode, rtx);
2291 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2294 /* Each pass can provide its own. */
2295 extern struct rtl_hooks rtl_hooks;
2297 /* ... but then it has to restore these. */
2298 extern const struct rtl_hooks general_rtl_hooks;
2300 /* Keep this for the nonce. */
2301 #define gen_lowpart rtl_hooks.gen_lowpart
2303 #endif /* ! GCC_RTL_H */
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