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, 2007
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
26 #include "statistics.h"
32 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
33 #undef FLOAT /* Likewise. */
34 #undef ABS /* Likewise. */
35 #undef PC /* Likewise. */
37 /* Value used by some passes to "recognize" noop moves as valid
39 #define NOOP_MOVE_INSN_CODE INT_MAX
41 /* Register Transfer Language EXPRESSIONS CODES */
43 #define RTX_CODE enum rtx_code
46 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
47 #include "rtl.def" /* rtl expressions are documented here */
50 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
52 Assumes default enum value assignment. */
54 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
55 /* The cast here, saves many elsewhere. */
57 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
60 /* We check bit 0-1 of some rtx class codes in the predicates below. */
62 /* Bit 0 = comparison if 0, arithmetic is 1
63 Bit 1 = 1 if commutative. */
69 /* Must follow the four preceding values. */
76 /* Bit 0 = 1 if constant. */
85 #define RTX_OBJ_MASK (~1)
86 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
87 #define RTX_COMPARE_MASK (~1)
88 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
89 #define RTX_ARITHMETIC_MASK (~1)
90 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
91 #define RTX_BINARY_MASK (~3)
92 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
93 #define RTX_COMMUTATIVE_MASK (~2)
94 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
95 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
97 extern const unsigned char rtx_length[NUM_RTX_CODE];
98 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
100 extern const char * const rtx_name[NUM_RTX_CODE];
101 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
103 extern const char * const rtx_format[NUM_RTX_CODE];
104 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
106 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
107 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
109 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
110 extern const unsigned char rtx_next[NUM_RTX_CODE];
112 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
113 relative to which the offsets are calculated, as explained in rtl.def. */
116 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
117 unsigned min_align: 8;
119 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
120 unsigned min_after_vec: 1; /* minimum address target label is
121 after the ADDR_DIFF_VEC. */
122 unsigned max_after_vec: 1; /* maximum address target label is
123 after the ADDR_DIFF_VEC. */
124 unsigned min_after_base: 1; /* minimum address target label is
126 unsigned max_after_base: 1; /* maximum address target label is
128 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
129 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
132 } addr_diff_vec_flags;
134 /* Structure used to describe the attributes of a MEM. These are hashed
135 so MEMs that the same attributes share a data structure. This means
136 they cannot be modified in place. If any element is nonzero, it means
137 the value of the corresponding attribute is unknown. */
138 /* ALIGN and SIZE are the alignment and size of the MEM itself,
139 while EXPR can describe a larger underlying object, which might have a
140 stricter alignment; OFFSET is the offset of the MEM within that object. */
141 typedef struct mem_attrs GTY(())
143 HOST_WIDE_INT alias; /* Memory alias set. */
144 tree expr; /* expr corresponding to MEM. */
145 rtx offset; /* Offset from start of DECL, as CONST_INT. */
146 rtx size; /* Size in bytes, as a CONST_INT. */
147 unsigned int align; /* Alignment of MEM in bits. */
150 /* Structure used to describe the attributes of a REG in similar way as
151 mem_attrs does for MEM above. */
153 typedef struct reg_attrs GTY(())
155 tree decl; /* decl corresponding to REG. */
156 HOST_WIDE_INT offset; /* Offset from start of DECL. */
159 /* Common union for an element of an rtx. */
164 unsigned int rt_uint;
168 enum machine_mode rt_type;
169 addr_diff_vec_flags rt_addr_diff_vec_flags;
170 struct cselib_val_struct *rt_cselib;
171 struct bitmap_head_def *rt_bit;
173 struct basic_block_def *rt_bb;
176 struct constant_descriptor_rtx *rt_constant;
178 typedef union rtunion_def rtunion;
180 /* This structure remembers the position of a SYMBOL_REF within an
181 object_block structure. A SYMBOL_REF only provides this information
182 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
183 struct block_symbol GTY(()) {
184 /* The usual SYMBOL_REF fields. */
185 rtunion GTY ((skip)) fld[3];
187 /* The block that contains this object. */
188 struct object_block *block;
190 /* The offset of this object from the start of its block. It is negative
191 if the symbol has not yet been assigned an offset. */
192 HOST_WIDE_INT offset;
196 DEF_VEC_ALLOC_P(rtx,heap);
197 DEF_VEC_ALLOC_P(rtx,gc);
199 /* Describes a group of objects that are to be placed together in such
200 a way that their relative positions are known. */
201 struct object_block GTY(())
203 /* The section in which these objects should be placed. */
206 /* The alignment of the first object, measured in bits. */
207 unsigned int alignment;
209 /* The total size of the objects, measured in bytes. */
212 /* The SYMBOL_REFs for each object. The vector is sorted in
213 order of increasing offset and the following conditions will
214 hold for each element X:
216 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
217 !SYMBOL_REF_ANCHOR_P (X)
218 SYMBOL_REF_BLOCK (X) == [address of this structure]
219 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
220 VEC(rtx,gc) *objects;
222 /* All the anchor SYMBOL_REFs used to address these objects, sorted
223 in order of increasing offset, and then increasing TLS model.
224 The following conditions will hold for each element X in this vector:
226 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
227 SYMBOL_REF_ANCHOR_P (X)
228 SYMBOL_REF_BLOCK (X) == [address of this structure]
229 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
230 VEC(rtx,gc) *anchors;
233 /* RTL expression ("rtx"). */
235 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
236 chain_prev ("RTX_PREV (&%h)")))
238 /* The kind of expression this is. */
239 ENUM_BITFIELD(rtx_code) code: 16;
241 /* The kind of value the expression has. */
242 ENUM_BITFIELD(machine_mode) mode : 8;
244 /* 1 in a MEM if we should keep the alias set for this mem unchanged
245 when we access a component.
246 1 in a CALL_INSN if it is a sibling call.
247 1 in a SET that is for a return.
248 In a CODE_LABEL, part of the two-bit alternate entry field. */
249 unsigned int jump : 1;
250 /* In a CODE_LABEL, part of the two-bit alternate entry field.
251 1 in a MEM if it cannot trap. */
252 unsigned int call : 1;
253 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
254 1 in a SUBREG if it references an unsigned object whose mode has been
255 from a promoted to a wider mode.
256 1 in a SYMBOL_REF if it addresses something in the per-function
258 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
259 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
260 unsigned int unchanging : 1;
261 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
262 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
263 if it has been deleted.
264 1 in a REG expression if corresponds to a variable declared by the user,
265 0 for an internally generated temporary.
266 1 in a SUBREG with a negative value.
267 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
268 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
269 unsigned int volatil : 1;
270 /* 1 in a MEM referring to a field of an aggregate.
271 0 if the MEM was a variable or the result of a * operator in C;
272 1 if it was the result of a . or -> operator (on a struct) in C.
273 1 in a REG if the register is used only in exit code a loop.
274 1 in a SUBREG expression if was generated from a variable with a
276 1 in a CODE_LABEL if the label is used for nonlocal gotos
277 and must not be deleted even if its count is zero.
278 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
279 together with the preceding insn. Valid only within sched.
280 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
281 from the target of a branch. Valid from reorg until end of compilation;
282 cleared before used. */
283 unsigned int in_struct : 1;
284 /* At the end of RTL generation, 1 if this rtx is used. This is used for
285 copying shared structure. See `unshare_all_rtl'.
286 In a REG, this is not needed for that purpose, and used instead
287 in `leaf_renumber_regs_insn'.
288 1 in a SYMBOL_REF, means that emit_library_call
289 has used it as the function. */
290 unsigned int used : 1;
291 /* 1 in an INSN or a SET if this rtx is related to the call frame,
292 either changing how we compute the frame address or saving and
293 restoring registers in the prologue and epilogue.
294 1 in a REG or MEM if it is a pointer.
295 1 in a SYMBOL_REF if it addresses something in the per-function
296 constant string pool. */
297 unsigned frame_related : 1;
298 /* 1 in a REG or PARALLEL that is the current function's return value.
299 1 in a MEM if it refers to a scalar.
300 1 in a SYMBOL_REF for a weak symbol. */
301 unsigned return_val : 1;
303 /* The first element of the operands of this rtx.
304 The number of operands and their types are controlled
305 by the `code' field, according to rtl.def. */
308 HOST_WIDE_INT hwint[1];
309 struct block_symbol block_sym;
310 struct real_value rv;
311 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
314 /* The size in bytes of an rtx header (code, mode and flags). */
315 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
317 /* The size in bytes of an rtx with code CODE. */
318 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
320 #define NULL_RTX (rtx) 0
322 /* The "next" and "previous" RTX, relative to this one. */
324 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
325 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
327 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
329 #define RTX_PREV(X) ((INSN_P (X) \
333 && PREV_INSN (X) != NULL \
334 && NEXT_INSN (PREV_INSN (X)) == X \
335 ? PREV_INSN (X) : NULL)
337 /* Define macros to access the `code' field of the rtx. */
339 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
340 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
342 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
343 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
345 /* RTL vector. These appear inside RTX's when there is a need
346 for a variable number of things. The principle use is inside
347 PARALLEL expressions. */
349 struct rtvec_def GTY(()) {
350 int num_elem; /* number of elements */
351 rtx GTY ((length ("%h.num_elem"))) elem[1];
354 #define NULL_RTVEC (rtvec) 0
356 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
357 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
359 /* Predicate yielding nonzero iff X is an rtx for a register. */
360 #define REG_P(X) (GET_CODE (X) == REG)
362 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
363 #define MEM_P(X) (GET_CODE (X) == MEM)
365 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
366 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
368 /* Predicate yielding nonzero iff X is a label insn. */
369 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
371 /* Predicate yielding nonzero iff X is a jump insn. */
372 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
374 /* Predicate yielding nonzero iff X is a call insn. */
375 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
377 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
378 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
380 /* Predicate yielding nonzero iff X is a real insn. */
382 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
384 /* Predicate yielding nonzero iff X is a note insn. */
385 #define NOTE_P(X) (GET_CODE (X) == NOTE)
387 /* Predicate yielding nonzero iff X is a barrier insn. */
388 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
390 /* Predicate yielding nonzero iff X is a data for a jump table. */
391 #define JUMP_TABLE_DATA_P(INSN) \
392 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
393 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
395 /* 1 if X is a unary operator. */
398 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
400 /* 1 if X is a binary operator. */
402 #define BINARY_P(X) \
403 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
405 /* 1 if X is an arithmetic operator. */
407 #define ARITHMETIC_P(X) \
408 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
409 == RTX_ARITHMETIC_RESULT)
411 /* 1 if X is an arithmetic operator. */
413 #define COMMUTATIVE_ARITH_P(X) \
414 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
416 /* 1 if X is a commutative arithmetic operator or a comparison operator.
417 These two are sometimes selected together because it is possible to
418 swap the two operands. */
420 #define SWAPPABLE_OPERANDS_P(X) \
421 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
422 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
423 | (1 << RTX_COMPARE)))
425 /* 1 if X is a non-commutative operator. */
427 #define NON_COMMUTATIVE_P(X) \
428 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
429 == RTX_NON_COMMUTATIVE_RESULT)
431 /* 1 if X is a commutative operator on integers. */
433 #define COMMUTATIVE_P(X) \
434 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
435 == RTX_COMMUTATIVE_RESULT)
437 /* 1 if X is a relational operator. */
439 #define COMPARISON_P(X) \
440 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
442 /* 1 if X is a constant value that is an integer. */
444 #define CONSTANT_P(X) \
445 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
447 /* 1 if X can be used to represent an object. */
448 #define OBJECT_P(X) \
449 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
451 /* General accessor macros for accessing the fields of an rtx. */
453 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
454 /* The bit with a star outside the statement expr and an & inside is
455 so that N can be evaluated only once. */
456 #define RTL_CHECK1(RTX, N, C1) __extension__ \
457 (*({ rtx const _rtx = (RTX); const int _n = (N); \
458 const enum rtx_code _code = GET_CODE (_rtx); \
459 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
460 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
462 if (GET_RTX_FORMAT(_code)[_n] != C1) \
463 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
465 &_rtx->u.fld[_n]; }))
467 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
468 (*({ rtx const _rtx = (RTX); const int _n = (N); \
469 const enum rtx_code _code = GET_CODE (_rtx); \
470 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
471 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
473 if (GET_RTX_FORMAT(_code)[_n] != C1 \
474 && GET_RTX_FORMAT(_code)[_n] != C2) \
475 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
477 &_rtx->u.fld[_n]; }))
479 #define RTL_CHECKC1(RTX, N, C) __extension__ \
480 (*({ rtx const _rtx = (RTX); const int _n = (N); \
481 if (GET_CODE (_rtx) != (C)) \
482 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
484 &_rtx->u.fld[_n]; }))
486 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
487 (*({ rtx const _rtx = (RTX); const int _n = (N); \
488 const enum rtx_code _code = GET_CODE (_rtx); \
489 if (_code != (C1) && _code != (C2)) \
490 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
492 &_rtx->u.fld[_n]; }))
494 #define RTVEC_ELT(RTVEC, I) __extension__ \
495 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
496 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
497 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
499 &_rtvec->elem[_i]; }))
501 #define XWINT(RTX, N) __extension__ \
502 (*({ rtx const _rtx = (RTX); const int _n = (N); \
503 const enum rtx_code _code = GET_CODE (_rtx); \
504 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
505 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
507 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
508 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
510 &_rtx->u.hwint[_n]; }))
512 #define XCWINT(RTX, N, C) __extension__ \
513 (*({ rtx const _rtx = (RTX); \
514 if (GET_CODE (_rtx) != (C)) \
515 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
517 &_rtx->u.hwint[N]; }))
519 #define XCMWINT(RTX, N, C, M) __extension__ \
520 (*({ rtx const _rtx = (RTX); \
521 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
522 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
523 __LINE__, __FUNCTION__); \
524 &_rtx->u.hwint[N]; }))
526 #define XCNMPRV(RTX, C, M) __extension__ \
527 ({ rtx const _rtx = (RTX); \
528 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
529 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
530 __LINE__, __FUNCTION__); \
533 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
534 ({ rtx const _symbol = (RTX); \
535 unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
536 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
537 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
539 &_symbol->u.block_sym; })
541 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
544 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
547 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
550 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
553 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
554 const char *, int, const char *)
556 extern void rtl_check_failed_code_mode (rtx, enum rtx_code, enum machine_mode,
557 bool, const char *, int, const char *)
559 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
561 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
565 #else /* not ENABLE_RTL_CHECKING */
567 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
568 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
569 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
570 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
571 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
572 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
573 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
574 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
575 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
576 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
577 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
581 /* General accessor macros for accessing the flags of an rtx. */
583 /* Access an individual rtx flag, with no checking of any kind. */
584 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
586 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
587 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
588 ({ rtx const _rtx = (RTX); \
589 if (GET_CODE(_rtx) != C1) \
590 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
594 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
595 ({ rtx const _rtx = (RTX); \
596 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
597 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
601 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
602 ({ rtx const _rtx = (RTX); \
603 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
604 && GET_CODE(_rtx) != C3) \
605 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
609 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
610 ({ rtx const _rtx = (RTX); \
611 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
612 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
613 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
617 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
618 ({ rtx const _rtx = (RTX); \
619 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
620 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
621 && GET_CODE(_rtx) != C5) \
622 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
626 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
628 ({ rtx const _rtx = (RTX); \
629 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
630 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
631 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
632 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
636 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
638 ({ rtx const _rtx = (RTX); \
639 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
640 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
641 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
642 && GET_CODE(_rtx) != C7) \
643 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
647 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
649 ({ rtx const _rtx = (RTX); \
650 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
651 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
652 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
653 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
654 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
658 extern void rtl_check_failed_flag (const char *, rtx, const char *,
663 #else /* not ENABLE_RTL_FLAG_CHECKING */
665 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
666 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
667 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
668 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
669 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
670 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
671 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
672 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
675 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
676 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
677 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
678 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
679 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
680 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
681 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
682 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
683 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
685 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
686 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
688 /* These are like XINT, etc. except that they expect a '0' field instead
689 of the normal type code. */
691 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
692 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
693 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
694 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
695 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
696 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
697 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
698 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
699 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
700 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
701 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
702 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
703 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
704 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
706 /* Access a '0' field with any type. */
707 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
709 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
710 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
711 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
712 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
713 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
714 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
715 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
716 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
717 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
718 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
720 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
721 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
723 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
725 /* ACCESS MACROS for particular fields of insns. */
727 /* Holds a unique number for each insn.
728 These are not necessarily sequentially increasing. */
729 #define INSN_UID(INSN) XINT (INSN, 0)
731 /* Chain insns together in sequence. */
732 #define PREV_INSN(INSN) XEXP (INSN, 1)
733 #define NEXT_INSN(INSN) XEXP (INSN, 2)
735 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
736 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
737 /* The body of an insn. */
738 #define PATTERN(INSN) XEXP (INSN, 5)
740 /* Code number of instruction, from when it was recognized.
741 -1 means this instruction has not been recognized yet. */
742 #define INSN_CODE(INSN) XINT (INSN, 6)
744 #define RTX_FRAME_RELATED_P(RTX) \
745 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
746 JUMP_INSN, BARRIER, SET)->frame_related)
748 /* 1 if RTX is an insn that has been deleted. */
749 #define INSN_DELETED_P(RTX) \
750 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
751 CODE_LABEL, BARRIER, NOTE)->volatil)
753 /* 1 if RTX is a call to a const or pure function. */
754 #define CONST_OR_PURE_CALL_P(RTX) \
755 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
756 EXPR_LIST)->unchanging)
758 /* 1 if RTX is a call_insn for a sibling call. */
759 #define SIBLING_CALL_P(RTX) \
760 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
762 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
763 #define INSN_ANNULLED_BRANCH_P(RTX) \
764 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
766 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
767 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
768 executed if the branch is taken. For annulled branches with this bit
769 clear, the insn should be executed only if the branch is not taken. */
770 #define INSN_FROM_TARGET_P(RTX) \
771 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
773 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
774 See the comments for ADDR_DIFF_VEC in rtl.def. */
775 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
777 /* In a VALUE, the value cselib has assigned to RTX.
778 This is a "struct cselib_val_struct", see cselib.h. */
779 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
781 /* Holds a list of notes on what this insn does to various REGs.
782 It is a chain of EXPR_LIST rtx's, where the second operand is the
783 chain pointer and the first operand is the REG being described.
784 The mode field of the EXPR_LIST contains not a real machine mode
785 but a value from enum reg_note. */
786 #define REG_NOTES(INSN) XEXP(INSN, 7)
790 #define DEF_REG_NOTE(NAME) NAME,
791 #include "reg-notes.def"
796 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
797 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
798 #define PUT_REG_NOTE_KIND(LINK, KIND) \
799 PUT_MODE (LINK, (enum machine_mode) (KIND))
801 /* Names for REG_NOTE's in EXPR_LIST insn's. */
803 extern const char * const reg_note_name[];
804 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
806 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
807 USE and CLOBBER expressions.
808 USE expressions list the registers filled with arguments that
809 are passed to the function.
810 CLOBBER expressions document the registers explicitly clobbered
812 Pseudo registers can not be mentioned in this list. */
813 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
815 /* The label-number of a code-label. The assembler label
816 is made from `L' and the label-number printed in decimal.
817 Label numbers are unique in a compilation. */
818 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
820 /* In a NOTE that is a line number, this is a string for the file name that the
821 line is in. We use the same field to record block numbers temporarily in
822 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
823 between ints and pointers if we use a different macro for the block number.)
827 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
828 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
829 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
830 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
831 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
832 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
833 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
835 /* In a NOTE that is a line number, this is the line number.
836 Other kinds of NOTEs are identified by negative numbers here. */
837 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
839 /* Nonzero if INSN is a note marking the beginning of a basic block. */
840 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
841 (GET_CODE (INSN) == NOTE \
842 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
844 /* Variable declaration and the location of a variable. */
845 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
847 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
850 /* Codes that appear in the NOTE_KIND field for kinds of notes
851 that are not line numbers. These codes are all negative.
853 Notice that we do not try to use zero here for any of
854 the special note codes because sometimes the source line
855 actually can be zero! This happens (for example) when we
856 are generating code for the per-translation-unit constructor
857 and destructor routines for some C++ translation unit. */
861 #define DEF_INSN_NOTE(NAME) NAME,
862 #include "insn-notes.def"
868 /* Names for NOTE insn's other than line numbers. */
870 extern const char * const note_insn_name[NOTE_INSN_MAX];
871 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
872 (note_insn_name[(NOTE_CODE)])
874 /* The name of a label, in case it corresponds to an explicit label
875 in the input source code. */
876 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
878 /* In jump.c, each label contains a count of the number
879 of LABEL_REFs that point at it, so unused labels can be deleted. */
880 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
882 /* Labels carry a two-bit field composed of the ->jump and ->call
883 bits. This field indicates whether the label is an alternate
884 entry point, and if so, what kind. */
887 LABEL_NORMAL = 0, /* ordinary label */
888 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
889 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
890 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
893 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
895 /* Retrieve the kind of LABEL. */
896 #define LABEL_KIND(LABEL) __extension__ \
897 ({ rtx const _label = (LABEL); \
898 if (GET_CODE (_label) != CODE_LABEL) \
899 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
901 (enum label_kind) ((_label->jump << 1) | _label->call); })
903 /* Set the kind of LABEL. */
904 #define SET_LABEL_KIND(LABEL, KIND) do { \
905 rtx _label = (LABEL); \
906 unsigned int _kind = (KIND); \
907 if (GET_CODE (_label) != CODE_LABEL) \
908 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
910 _label->jump = ((_kind >> 1) & 1); \
911 _label->call = (_kind & 1); \
916 /* Retrieve the kind of LABEL. */
917 #define LABEL_KIND(LABEL) \
918 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
920 /* Set the kind of LABEL. */
921 #define SET_LABEL_KIND(LABEL, KIND) do { \
922 rtx _label = (LABEL); \
923 unsigned int _kind = (KIND); \
924 _label->jump = ((_kind >> 1) & 1); \
925 _label->call = (_kind & 1); \
928 #endif /* rtl flag checking */
930 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
932 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
933 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
934 be decremented and possibly the label can be deleted. */
935 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
937 /* Once basic blocks are found, each CODE_LABEL starts a chain that
938 goes through all the LABEL_REFs that jump to that label. The chain
939 eventually winds up at the CODE_LABEL: it is circular. */
940 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
942 /* For a REG rtx, REGNO extracts the register number. REGNO can only
943 be used on RHS. Use SET_REGNO to change the value. */
944 #define REGNO(RTX) (rhs_regno(RTX))
945 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
947 /* ORIGINAL_REGNO holds the number the register originally had; for a
948 pseudo register turned into a hard reg this will hold the old pseudo
950 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
952 /* Force the REGNO macro to only be used on the lhs. */
953 static inline unsigned int
956 return XCUINT (x, 0, REG);
961 /* 1 if RTX is a reg or parallel that is the current function's return
963 #define REG_FUNCTION_VALUE_P(RTX) \
964 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
966 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
967 #define REG_USERVAR_P(RTX) \
968 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
970 /* 1 if RTX is a reg that holds a pointer value. */
971 #define REG_POINTER(RTX) \
972 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
974 /* 1 if RTX is a mem that holds a pointer value. */
975 #define MEM_POINTER(RTX) \
976 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
978 /* 1 if the given register REG corresponds to a hard register. */
979 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
981 /* 1 if the given register number REG_NO corresponds to a hard register. */
982 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
984 /* For a CONST_INT rtx, INTVAL extracts the integer. */
985 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
986 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
988 /* For a CONST_DOUBLE:
989 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
990 low-order word and ..._HIGH the high-order.
991 For a float, there is a REAL_VALUE_TYPE structure, and
992 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
993 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
994 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
995 #define CONST_DOUBLE_REAL_VALUE(r) \
996 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
998 /* For a CONST_VECTOR, return element #n. */
999 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1001 /* For a CONST_VECTOR, return the number of elements in a vector. */
1002 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1004 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1005 SUBREG_BYTE extracts the byte-number. */
1007 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1008 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1011 /* Return the right cost to give to an operation
1012 to make the cost of the corresponding register-to-register instruction
1013 N times that of a fast register-to-register instruction. */
1014 #define COSTS_N_INSNS(N) ((N) * 4)
1016 /* Maximum cost of an rtl expression. This value has the special meaning
1017 not to use an rtx with this cost under any circumstances. */
1018 #define MAX_COST INT_MAX
1020 extern void init_rtlanal (void);
1021 extern int rtx_cost (rtx, enum rtx_code);
1022 extern int address_cost (rtx, enum machine_mode);
1023 extern unsigned int subreg_lsb (rtx);
1024 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1026 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1027 unsigned int, enum machine_mode);
1028 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1029 unsigned int, enum machine_mode);
1030 extern unsigned int subreg_regno (rtx);
1031 extern unsigned int subreg_nregs (rtx);
1032 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1033 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1034 extern bool constant_pool_constant_p (rtx);
1035 extern bool truncated_to_mode (enum machine_mode, rtx);
1038 /* 1 if RTX is a subreg containing a reg that is already known to be
1039 sign- or zero-extended from the mode of the subreg to the mode of
1040 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1043 When used as a LHS, is means that this extension must be done
1044 when assigning to SUBREG_REG. */
1046 #define SUBREG_PROMOTED_VAR_P(RTX) \
1047 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1049 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1051 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1053 _rtx->volatil = 1; \
1055 _rtx->volatil = 0; \
1056 _rtx->unchanging = (VAL); \
1059 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1060 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1061 ? -1 : (RTX)->unchanging)
1063 /* Access various components of an ASM_OPERANDS rtx. */
1065 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1066 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1067 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1068 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1069 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1070 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1071 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1072 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1073 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1074 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1075 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1076 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1077 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1078 #ifdef USE_MAPPED_LOCATION
1079 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1080 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1082 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1083 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1084 #define ASM_INPUT_SOURCE_FILE(RTX) XCSTR (RTX, 1, ASM_INPUT)
1085 #define ASM_INPUT_SOURCE_LINE(RTX) XCINT (RTX, 2, ASM_INPUT)
1088 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1089 #define MEM_READONLY_P(RTX) \
1090 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1092 /* 1 if RTX is a mem and we should keep the alias set for this mem
1093 unchanged when we access a component. Set to 1, or example, when we
1094 are already in a non-addressable component of an aggregate. */
1095 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1096 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1098 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1099 #define MEM_VOLATILE_P(RTX) \
1100 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1101 ASM_INPUT)->volatil)
1103 /* 1 if RTX is a mem that refers to an aggregate, either to the
1104 aggregate itself or to a field of the aggregate. If zero, RTX may
1105 or may not be such a reference. */
1106 #define MEM_IN_STRUCT_P(RTX) \
1107 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1109 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1110 not refer to a scalar. */
1111 #define MEM_SCALAR_P(RTX) \
1112 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1114 /* 1 if RTX is a mem that cannot trap. */
1115 #define MEM_NOTRAP_P(RTX) \
1116 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1118 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1119 RTX. Otherwise, vice versa. Use this macro only when you are
1120 *sure* that you know that the MEM is in a structure, or is a
1121 scalar. VAL is evaluated only once. */
1122 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1126 MEM_IN_STRUCT_P (RTX) = 1; \
1127 MEM_SCALAR_P (RTX) = 0; \
1131 MEM_IN_STRUCT_P (RTX) = 0; \
1132 MEM_SCALAR_P (RTX) = 1; \
1136 /* The memory attribute block. We provide access macros for each value
1137 in the block and provide defaults if none specified. */
1138 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1140 /* The register attribute block. We provide access macros for each value
1141 in the block and provide defaults if none specified. */
1142 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1144 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1145 set, and may alias anything. Otherwise, the MEM can only alias
1146 MEMs in a conflicting alias set. This value is set in a
1147 language-dependent manner in the front-end, and should not be
1148 altered in the back-end. These set numbers are tested with
1149 alias_sets_conflict_p. */
1150 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1152 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1153 refer to part of a DECL. It may also be a COMPONENT_REF. */
1154 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1156 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1157 RTX that is always a CONST_INT. */
1158 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1160 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1161 is always a CONST_INT. */
1162 #define MEM_SIZE(RTX) \
1163 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1164 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1167 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1168 mode as a default when STRICT_ALIGNMENT, but not if not. */
1169 #define MEM_ALIGN(RTX) \
1170 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1171 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1172 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1174 /* For a REG rtx, the decl it is known to refer to, if it is known to
1175 refer to part of a DECL. */
1176 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1178 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1179 RTX that is always a CONST_INT. */
1180 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1182 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1183 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1184 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1185 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1186 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1187 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1188 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1189 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1190 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1191 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1193 /* 1 if RTX is a label_ref for a nonlocal label. */
1194 /* Likewise in an expr_list for a reg_label note. */
1195 #define LABEL_REF_NONLOCAL_P(RTX) \
1196 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1197 REG_LABEL)->volatil)
1199 /* 1 if RTX is a code_label that should always be considered to be needed. */
1200 #define LABEL_PRESERVE_P(RTX) \
1201 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1203 /* During sched, 1 if RTX is an insn that must be scheduled together
1204 with the preceding insn. */
1205 #define SCHED_GROUP_P(RTX) \
1206 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1209 /* For a SET rtx, SET_DEST is the place that is set
1210 and SET_SRC is the value it is set to. */
1211 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1212 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1213 #define SET_IS_RETURN_P(RTX) \
1214 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1216 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1217 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1218 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1220 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1221 conditionally executing the code on, COND_EXEC_CODE is the code
1222 to execute if the condition is true. */
1223 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1224 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1226 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1228 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1229 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1231 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1232 tree constant pool. This information is private to varasm.c. */
1233 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1234 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1235 (RTX), SYMBOL_REF)->frame_related)
1237 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1238 #define SYMBOL_REF_FLAG(RTX) \
1239 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1241 /* 1 if RTX is a symbol_ref that has been the library function in
1242 emit_library_call. */
1243 #define SYMBOL_REF_USED(RTX) \
1244 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1246 /* 1 if RTX is a symbol_ref for a weak symbol. */
1247 #define SYMBOL_REF_WEAK(RTX) \
1248 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1250 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1251 SYMBOL_REF_CONSTANT. */
1252 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1254 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1256 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1257 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1259 /* The tree (decl or constant) associated with the symbol, or null. */
1260 #define SYMBOL_REF_DECL(RTX) \
1261 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1263 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1264 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1265 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1267 /* The rtx constant pool entry for a symbol, or null. */
1268 #define SYMBOL_REF_CONSTANT(RTX) \
1269 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1271 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1272 information derivable from the tree decl associated with this symbol.
1273 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1274 decl. In some cases this is a bug. But beyond that, it's nice to cache
1275 this information to avoid recomputing it. Finally, this allows space for
1276 the target to store more than one bit of information, as with
1278 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1280 /* These flags are common enough to be defined for all targets. They
1281 are computed by the default version of targetm.encode_section_info. */
1283 /* Set if this symbol is a function. */
1284 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1285 #define SYMBOL_REF_FUNCTION_P(RTX) \
1286 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1287 /* Set if targetm.binds_local_p is true. */
1288 #define SYMBOL_FLAG_LOCAL (1 << 1)
1289 #define SYMBOL_REF_LOCAL_P(RTX) \
1290 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1291 /* Set if targetm.in_small_data_p is true. */
1292 #define SYMBOL_FLAG_SMALL (1 << 2)
1293 #define SYMBOL_REF_SMALL_P(RTX) \
1294 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1295 /* The three-bit field at [5:3] is true for TLS variables; use
1296 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1297 #define SYMBOL_FLAG_TLS_SHIFT 3
1298 #define SYMBOL_REF_TLS_MODEL(RTX) \
1299 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1300 /* Set if this symbol is not defined in this translation unit. */
1301 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1302 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1303 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1304 /* Set if this symbol has a block_symbol structure associated with it. */
1305 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1306 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1307 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1308 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1309 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1310 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1311 #define SYMBOL_REF_ANCHOR_P(RTX) \
1312 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1314 /* Subsequent bits are available for the target to use. */
1315 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1316 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1318 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1319 structure to which the symbol belongs, or NULL if it has not been
1320 assigned a block. */
1321 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1323 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1324 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1325 RTX has not yet been assigned to a block, or it has not been given an
1326 offset within that block. */
1327 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1329 /* Indicate whether the machine has any sort of auto increment addressing.
1330 If not, we can avoid checking for REG_INC notes. */
1332 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1333 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1334 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1335 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1336 #define AUTO_INC_DEC
1339 /* Define a macro to look for REG_INC notes,
1340 but save time on machines where they never exist. */
1343 #define FIND_REG_INC_NOTE(INSN, REG) \
1344 ((REG) != NULL_RTX && REG_P ((REG)) \
1345 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1346 : find_reg_note ((INSN), REG_INC, (REG)))
1348 #define FIND_REG_INC_NOTE(INSN, REG) 0
1351 #ifndef HAVE_PRE_INCREMENT
1352 #define HAVE_PRE_INCREMENT 0
1355 #ifndef HAVE_PRE_DECREMENT
1356 #define HAVE_PRE_DECREMENT 0
1359 #ifndef HAVE_POST_INCREMENT
1360 #define HAVE_POST_INCREMENT 0
1363 #ifndef HAVE_POST_DECREMENT
1364 #define HAVE_POST_DECREMENT 0
1367 #ifndef HAVE_POST_MODIFY_DISP
1368 #define HAVE_POST_MODIFY_DISP 0
1371 #ifndef HAVE_POST_MODIFY_REG
1372 #define HAVE_POST_MODIFY_REG 0
1375 #ifndef HAVE_PRE_MODIFY_DISP
1376 #define HAVE_PRE_MODIFY_DISP 0
1379 #ifndef HAVE_PRE_MODIFY_REG
1380 #define HAVE_PRE_MODIFY_REG 0
1384 /* Some architectures do not have complete pre/post increment/decrement
1385 instruction sets, or only move some modes efficiently. These macros
1386 allow us to tune autoincrement generation. */
1388 #ifndef USE_LOAD_POST_INCREMENT
1389 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1392 #ifndef USE_LOAD_POST_DECREMENT
1393 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1396 #ifndef USE_LOAD_PRE_INCREMENT
1397 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1400 #ifndef USE_LOAD_PRE_DECREMENT
1401 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1404 #ifndef USE_STORE_POST_INCREMENT
1405 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1408 #ifndef USE_STORE_POST_DECREMENT
1409 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1412 #ifndef USE_STORE_PRE_INCREMENT
1413 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1416 #ifndef USE_STORE_PRE_DECREMENT
1417 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1420 /* Nonzero when we are generating CONCATs. */
1421 extern int generating_concat_p;
1423 /* Nonzero when we are expanding trees to RTL. */
1424 extern int currently_expanding_to_rtl;
1426 /* Generally useful functions. */
1429 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1432 extern void set_stack_check_libfunc (rtx);
1433 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1434 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1437 extern rtx gen_blockage (void);
1438 extern rtvec gen_rtvec (int, ...);
1439 extern rtx copy_insn_1 (rtx);
1440 extern rtx copy_insn (rtx);
1441 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1442 extern rtx emit_copy_of_insn_after (rtx, rtx);
1443 extern void set_reg_attrs_from_mem (rtx, rtx);
1444 extern void set_mem_attrs_from_reg (rtx, rtx);
1445 extern void set_reg_attrs_for_parm (rtx, rtx);
1446 extern int mem_expr_equal_p (tree, tree);
1449 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1450 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1452 extern rtvec rtvec_alloc (int);
1453 extern bool shared_const_p (rtx);
1454 extern rtx copy_rtx (rtx);
1455 extern void dump_rtx_statistics (void);
1458 extern rtx copy_rtx_if_shared (rtx);
1461 extern unsigned int rtx_size (rtx);
1462 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1463 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1464 extern int rtx_equal_p (rtx, rtx);
1467 extern rtvec gen_rtvec_v (int, rtx *);
1468 extern rtx gen_reg_rtx (enum machine_mode);
1469 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1470 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1471 extern rtx gen_label_rtx (void);
1472 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1475 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1478 extern rtx gen_highpart (enum machine_mode, rtx);
1479 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1480 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1483 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1484 extern int subreg_lowpart_p (rtx);
1485 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1487 extern unsigned int subreg_highpart_offset (enum machine_mode,
1489 extern rtx make_safe_from (rtx, rtx);
1490 extern rtx convert_memory_address (enum machine_mode, rtx);
1491 extern rtx get_insns (void);
1492 extern const char *get_insn_name (int);
1493 extern rtx get_last_insn (void);
1494 extern rtx get_last_insn_anywhere (void);
1495 extern rtx get_first_nonnote_insn (void);
1496 extern rtx get_last_nonnote_insn (void);
1497 extern void start_sequence (void);
1498 extern void push_to_sequence (rtx);
1499 extern void push_to_sequence2 (rtx, rtx);
1500 extern void end_sequence (void);
1501 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1506 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1509 extern rtx force_const_mem (enum machine_mode, rtx);
1514 extern rtx get_pool_constant (rtx);
1515 extern rtx get_pool_constant_mark (rtx, bool *);
1516 extern enum machine_mode get_pool_mode (rtx);
1517 extern rtx simplify_subtraction (rtx);
1520 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1521 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1522 extern rtx assign_stack_temp_for_type (enum machine_mode,
1523 HOST_WIDE_INT, int, tree);
1524 extern rtx assign_temp (tree, int, int, int);
1527 extern rtx emit_insn_before (rtx, rtx);
1528 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1529 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1530 extern rtx emit_jump_insn_before (rtx, rtx);
1531 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1532 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1533 extern rtx emit_call_insn_before (rtx, rtx);
1534 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1535 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1536 extern rtx emit_barrier_before (rtx);
1537 extern rtx emit_label_before (rtx, rtx);
1538 extern rtx emit_note_before (enum insn_note, rtx);
1539 extern rtx emit_insn_after (rtx, rtx);
1540 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1541 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1542 extern rtx emit_jump_insn_after (rtx, rtx);
1543 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1544 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1545 extern rtx emit_call_insn_after (rtx, rtx);
1546 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1547 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1548 extern rtx emit_barrier_after (rtx);
1549 extern rtx emit_label_after (rtx, rtx);
1550 extern rtx emit_note_after (enum insn_note, rtx);
1551 extern rtx emit_insn (rtx);
1552 extern rtx emit_jump_insn (rtx);
1553 extern rtx emit_call_insn (rtx);
1554 extern rtx emit_label (rtx);
1555 extern rtx emit_barrier (void);
1556 extern rtx emit_note (enum insn_note);
1557 extern rtx emit_note_copy (rtx);
1558 extern rtx make_insn_raw (rtx);
1559 extern rtx make_jump_insn_raw (rtx);
1560 extern void add_function_usage_to (rtx, rtx);
1561 extern rtx last_call_insn (void);
1562 extern rtx previous_insn (rtx);
1563 extern rtx next_insn (rtx);
1564 extern rtx prev_nonnote_insn (rtx);
1565 extern rtx next_nonnote_insn (rtx);
1566 extern rtx prev_real_insn (rtx);
1567 extern rtx next_real_insn (rtx);
1568 extern rtx prev_active_insn (rtx);
1569 extern rtx next_active_insn (rtx);
1570 extern int active_insn_p (rtx);
1571 extern rtx prev_label (rtx);
1572 extern rtx next_label (rtx);
1573 extern rtx skip_consecutive_labels (rtx);
1574 extern rtx next_cc0_user (rtx);
1575 extern rtx prev_cc0_setter (rtx);
1577 /* In cfglayout.c */
1578 extern int insn_line (rtx);
1579 extern const char * insn_file (rtx);
1580 extern int locator_line (int);
1581 extern const char * locator_file (int);
1582 extern int prologue_locator, epilogue_locator;
1585 extern enum rtx_code reverse_condition (enum rtx_code);
1586 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1587 extern enum rtx_code swap_condition (enum rtx_code);
1588 extern enum rtx_code unsigned_condition (enum rtx_code);
1589 extern enum rtx_code signed_condition (enum rtx_code);
1590 extern void mark_jump_label (rtx, rtx, int);
1591 extern unsigned int cleanup_barriers (void);
1594 extern rtx delete_related_insns (rtx);
1597 extern rtx *find_constant_term_loc (rtx *);
1600 extern rtx try_split (rtx, rtx, int);
1601 extern int split_branch_probability;
1603 /* In unknown file */
1604 extern rtx split_insns (rtx, rtx);
1606 /* In simplify-rtx.c */
1607 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1608 rtx, enum machine_mode);
1609 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1611 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1613 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1615 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1616 enum machine_mode, rtx, rtx, rtx);
1617 extern rtx simplify_const_relational_operation (enum rtx_code,
1618 enum machine_mode, rtx, rtx);
1619 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1620 enum machine_mode, rtx, rtx);
1621 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1622 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1624 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1625 enum machine_mode, rtx, rtx, rtx);
1626 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1627 enum machine_mode, rtx, rtx);
1628 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1630 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1632 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1633 extern rtx simplify_rtx (rtx);
1634 extern rtx avoid_constant_pool_reference (rtx);
1635 extern bool mode_signbit_p (enum machine_mode, rtx);
1638 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1642 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1643 extern void set_insn_deleted (rtx);
1645 /* Functions in rtlanal.c */
1647 /* Single set is implemented as macro for performance reasons. */
1648 #define single_set(I) (INSN_P (I) \
1649 ? (GET_CODE (PATTERN (I)) == SET \
1650 ? PATTERN (I) : single_set_1 (I)) \
1652 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1654 /* Structure used for passing data to REPLACE_LABEL. */
1655 typedef struct replace_label_data
1659 bool update_label_nuses;
1660 } replace_label_data;
1662 extern int rtx_addr_can_trap_p (rtx);
1663 extern bool nonzero_address_p (rtx);
1664 extern int rtx_unstable_p (rtx);
1665 extern int rtx_varies_p (rtx, int);
1666 extern int rtx_addr_varies_p (rtx, int);
1667 extern HOST_WIDE_INT get_integer_term (rtx);
1668 extern rtx get_related_value (rtx);
1669 extern bool offset_within_block_p (rtx, HOST_WIDE_INT);
1670 extern void split_const (rtx, rtx *, rtx *);
1671 extern int reg_mentioned_p (rtx, rtx);
1672 extern int count_occurrences (rtx, rtx, int);
1673 extern int reg_referenced_p (rtx, rtx);
1674 extern int reg_used_between_p (rtx, rtx, rtx);
1675 extern int reg_set_between_p (rtx, rtx, rtx);
1676 extern int commutative_operand_precedence (rtx);
1677 extern int swap_commutative_operands_p (rtx, rtx);
1678 extern int modified_between_p (rtx, rtx, rtx);
1679 extern int no_labels_between_p (rtx, rtx);
1680 extern int modified_in_p (rtx, rtx);
1681 extern int reg_set_p (rtx, rtx);
1682 extern rtx single_set_2 (rtx, rtx);
1683 extern int multiple_sets (rtx);
1684 extern int set_noop_p (rtx);
1685 extern int noop_move_p (rtx);
1686 extern rtx find_last_value (rtx, rtx *, rtx, int);
1687 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1688 extern int reg_overlap_mentioned_p (rtx, rtx);
1689 extern rtx set_of (rtx, rtx);
1690 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1691 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1692 extern int dead_or_set_p (rtx, rtx);
1693 extern int dead_or_set_regno_p (rtx, unsigned int);
1694 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1695 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1696 extern rtx find_reg_equal_equiv_note (rtx);
1697 extern rtx find_constant_src (rtx);
1698 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1699 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1700 extern int pure_call_p (rtx);
1701 extern void remove_note (rtx, rtx);
1702 extern void remove_reg_equal_equiv_notes (rtx);
1703 extern int side_effects_p (rtx);
1704 extern int volatile_refs_p (rtx);
1705 extern int volatile_insn_p (rtx);
1706 extern int may_trap_p (rtx);
1707 extern int may_trap_after_code_motion_p (rtx);
1708 extern int may_trap_or_fault_p (rtx);
1709 extern int inequality_comparisons_p (rtx);
1710 extern rtx replace_rtx (rtx, rtx, rtx);
1711 extern int replace_label (rtx *, void *);
1712 extern int rtx_referenced_p (rtx, rtx);
1713 extern bool tablejump_p (rtx, rtx *, rtx *);
1714 extern int computed_jump_p (rtx);
1715 typedef int (*rtx_function) (rtx *, void *);
1716 extern int for_each_rtx (rtx *, rtx_function, void *);
1717 extern rtx regno_use_in (unsigned int, rtx);
1718 extern int auto_inc_p (rtx);
1719 extern int in_expr_list_p (rtx, rtx);
1720 extern void remove_node_from_expr_list (rtx, rtx *);
1721 extern int loc_mentioned_in_p (rtx *, rtx);
1722 extern rtx find_first_parameter_load (rtx, rtx);
1723 extern bool keep_with_call_p (rtx);
1724 extern bool label_is_jump_target_p (rtx, rtx);
1725 extern int insn_rtx_cost (rtx);
1727 /* Given an insn and condition, return a canonical description of
1728 the test being made. */
1729 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1731 /* Given a JUMP_INSN, return a canonical description of the test
1733 extern rtx get_condition (rtx, rtx *, int, int);
1737 void free_EXPR_LIST_list (rtx *);
1738 void free_INSN_LIST_list (rtx *);
1739 void free_EXPR_LIST_node (rtx);
1740 void free_INSN_LIST_node (rtx);
1741 rtx alloc_INSN_LIST (rtx, rtx);
1742 rtx alloc_EXPR_LIST (int, rtx, rtx);
1743 void remove_free_INSN_LIST_elem (rtx, rtx *);
1744 rtx remove_list_elem (rtx, rtx *);
1748 /* Free up register info memory. */
1749 extern void free_reg_info (void);
1752 extern int asm_noperands (rtx);
1753 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1754 enum machine_mode *, location_t *);
1756 extern enum reg_class reg_preferred_class (int);
1757 extern enum reg_class reg_alternate_class (int);
1759 extern void split_all_insns (void);
1760 extern unsigned int split_all_insns_noflow (void);
1762 #define MAX_SAVED_CONST_INT 64
1763 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1765 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1766 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1767 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1768 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1769 extern GTY(()) rtx const_true_rtx;
1771 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1773 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1774 same as VOIDmode. */
1776 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1778 /* Likewise, for the constants 1 and 2. */
1780 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1781 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1783 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1784 is used to represent the frame pointer. This is because the
1785 hard frame pointer and the automatic variables are separated by an amount
1786 that cannot be determined until after register allocation. We can assume
1787 that in this case ELIMINABLE_REGS will be defined, one action of which
1788 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1789 #ifndef HARD_FRAME_POINTER_REGNUM
1790 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1793 /* Index labels for global_rtl. */
1794 enum global_rtl_index
1800 /* For register elimination to work properly these hard_frame_pointer_rtx,
1801 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1802 the same register. */
1803 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1804 GR_ARG_POINTER = GR_FRAME_POINTER,
1806 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1807 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1809 GR_HARD_FRAME_POINTER,
1811 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1812 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1813 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1818 GR_VIRTUAL_INCOMING_ARGS,
1819 GR_VIRTUAL_STACK_ARGS,
1820 GR_VIRTUAL_STACK_DYNAMIC,
1821 GR_VIRTUAL_OUTGOING_ARGS,
1827 /* Pointers to standard pieces of rtx are stored here. */
1828 extern GTY(()) rtx global_rtl[GR_MAX];
1830 /* Standard pieces of rtx, to be substituted directly into things. */
1831 #define pc_rtx (global_rtl[GR_PC])
1832 #define cc0_rtx (global_rtl[GR_CC0])
1834 /* All references to certain hard regs, except those created
1835 by allocating pseudo regs into them (when that's possible),
1836 go through these unique rtx objects. */
1837 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1838 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1839 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1840 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1842 extern GTY(()) rtx pic_offset_table_rtx;
1843 extern GTY(()) rtx static_chain_rtx;
1844 extern GTY(()) rtx static_chain_incoming_rtx;
1845 extern GTY(()) rtx return_address_pointer_rtx;
1847 /* Include the RTL generation functions. */
1849 #ifndef GENERATOR_FILE
1851 #undef gen_rtx_ASM_INPUT
1852 #ifdef USE_MAPPED_LOCATION
1853 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
1854 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
1855 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
1856 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
1858 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
1859 gen_rtx_fmt_ssi (ASM_INPUT, (MODE), (ARG0), "", 0)
1860 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
1861 gen_rtx_fmt_ssi (ASM_INPUT, (MODE), (ARG0), (LOC).file, (LOC).line)
1862 #undef gen_rtx_ASM_OPERANDS
1863 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1864 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1868 /* There are some RTL codes that require special attention; the
1869 generation functions included above do the raw handling. If you
1870 add to this list, modify special_rtx in gengenrtl.c as well. */
1872 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1873 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1874 extern rtx gen_raw_REG (enum machine_mode, int);
1875 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1876 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1877 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1879 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1881 /* Virtual registers are used during RTL generation to refer to locations into
1882 the stack frame when the actual location isn't known until RTL generation
1883 is complete. The routine instantiate_virtual_regs replaces these with
1884 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1887 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1889 /* This points to the first word of the incoming arguments passed on the stack,
1890 either by the caller or by the callee when pretending it was passed by the
1893 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1895 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1897 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1898 variable on the stack. Otherwise, it points to the first variable on
1901 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1903 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1905 /* This points to the location of dynamically-allocated memory on the stack
1906 immediately after the stack pointer has been adjusted by the amount
1909 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1911 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1913 /* This points to the location in the stack at which outgoing arguments should
1914 be written when the stack is pre-pushed (arguments pushed using push
1915 insns always use sp). */
1917 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1919 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1921 /* This points to the Canonical Frame Address of the function. This
1922 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1923 but is calculated relative to the arg pointer for simplicity; the
1924 frame pointer nor stack pointer are necessarily fixed relative to
1925 the CFA until after reload. */
1927 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1929 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1931 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1933 /* Nonzero if REGNUM is a pointer into the stack frame. */
1934 #define REGNO_PTR_FRAME_P(REGNUM) \
1935 ((REGNUM) == STACK_POINTER_REGNUM \
1936 || (REGNUM) == FRAME_POINTER_REGNUM \
1937 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1938 || (REGNUM) == ARG_POINTER_REGNUM \
1939 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1940 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1942 /* REGNUM never really appearing in the INSN stream. */
1943 #define INVALID_REGNUM (~(unsigned int) 0)
1945 extern rtx output_constant_def (tree, int);
1946 extern rtx lookup_constant_def (tree);
1948 /* Nonzero after end of reload pass.
1949 Set to 1 or 0 by reload1.c. */
1951 extern int reload_completed;
1953 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1954 extern int epilogue_completed;
1956 /* Set to 1 while reload_as_needed is operating.
1957 Required by some machines to handle any generated moves differently. */
1959 extern int reload_in_progress;
1961 /* This macro indicates whether you may create a new
1964 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
1967 /* Nonzero after end of regstack pass.
1968 Set to 1 or 0 by reg-stack.c. */
1969 extern int regstack_completed;
1972 /* If this is nonzero, we do not bother generating VOLATILE
1973 around volatile memory references, and we are willing to
1974 output indirect addresses. If cse is to follow, we reject
1975 indirect addresses so a useful potential cse is generated;
1976 if it is used only once, instruction combination will produce
1977 the same indirect address eventually. */
1978 extern int cse_not_expected;
1980 /* Translates rtx code to tree code, for those codes needed by
1981 REAL_ARITHMETIC. The function returns an int because the caller may not
1982 know what `enum tree_code' means. */
1984 extern int rtx_to_tree_code (enum rtx_code);
1987 extern int delete_trivially_dead_insns (rtx, int);
1988 extern int cse_main (rtx, int);
1989 extern int exp_equiv_p (rtx, rtx, int, bool);
1990 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
1993 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
1994 extern int condjump_p (rtx);
1995 extern int any_condjump_p (rtx);
1996 extern int any_uncondjump_p (rtx);
1997 extern rtx pc_set (rtx);
1998 extern rtx condjump_label (rtx);
1999 extern int simplejump_p (rtx);
2000 extern int returnjump_p (rtx);
2001 extern int onlyjump_p (rtx);
2002 extern int only_sets_cc0_p (rtx);
2003 extern int sets_cc0_p (rtx);
2004 extern int invert_jump_1 (rtx, rtx);
2005 extern int invert_jump (rtx, rtx, int);
2006 extern int rtx_renumbered_equal_p (rtx, rtx);
2007 extern int true_regnum (rtx);
2008 extern unsigned int reg_or_subregno (rtx);
2009 extern int redirect_jump_1 (rtx, rtx);
2010 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2011 extern int redirect_jump (rtx, rtx, int);
2012 extern void rebuild_jump_labels (rtx);
2013 extern rtx reversed_comparison (rtx, enum machine_mode);
2014 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2015 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2017 extern void delete_for_peephole (rtx, rtx);
2018 extern int condjump_in_parallel_p (rtx);
2020 /* In emit-rtl.c. */
2021 extern int max_reg_num (void);
2022 extern int max_label_num (void);
2023 extern int get_first_label_num (void);
2024 extern void maybe_set_first_label_num (rtx);
2025 extern void delete_insns_since (rtx);
2026 extern void mark_reg_pointer (rtx, int);
2027 extern void mark_user_reg (rtx);
2028 extern void reset_used_flags (rtx);
2029 extern void set_used_flags (rtx);
2030 extern void reorder_insns (rtx, rtx, rtx);
2031 extern void reorder_insns_nobb (rtx, rtx, rtx);
2032 extern int get_max_uid (void);
2033 extern int in_sequence_p (void);
2034 extern void force_next_line_note (void);
2035 extern void init_emit (void);
2036 extern void init_emit_once (int);
2037 extern void push_topmost_sequence (void);
2038 extern void pop_topmost_sequence (void);
2039 extern void set_new_first_and_last_insn (rtx, rtx);
2040 extern unsigned int unshare_all_rtl (void);
2041 extern void unshare_all_rtl_again (rtx);
2042 extern void unshare_all_rtl_in_chain (rtx);
2043 extern void verify_rtl_sharing (void);
2044 extern void set_first_insn (rtx);
2045 extern void set_last_insn (rtx);
2046 extern void link_cc0_insns (rtx);
2047 extern void add_insn (rtx);
2048 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2049 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2050 extern void remove_insn (rtx);
2051 extern rtx emit (rtx);
2052 extern rtx delete_insn (rtx);
2053 extern rtx entry_of_function (void);
2054 extern void emit_insn_at_entry (rtx);
2055 extern void delete_insn_chain (rtx, rtx, bool);
2056 extern rtx unlink_insn_chain (rtx, rtx);
2057 extern rtx delete_insn_and_edges (rtx);
2058 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2059 extern rtx gen_const_mem (enum machine_mode, rtx);
2060 extern rtx gen_frame_mem (enum machine_mode, rtx);
2061 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2062 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2066 extern unsigned int extended_count (rtx, enum machine_mode, int);
2067 extern rtx remove_death (unsigned int, rtx);
2068 extern void dump_combine_stats (FILE *);
2069 extern void dump_combine_total_stats (FILE *);
2071 /* In cfgcleanup.c */
2072 extern void delete_dead_jumptables (void);
2074 /* In sched-vis.c. */
2075 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2076 extern void dump_insn_slim (FILE *f, rtx x);
2077 extern void debug_insn_slim (rtx x);
2079 /* In sched-rgn.c. */
2080 extern void schedule_insns (void);
2082 /* In sched-ebb.c. */
2083 extern void schedule_ebbs (void);
2085 /* In haifa-sched.c. */
2086 extern void fix_sched_param (const char *, const char *);
2088 /* In print-rtl.c */
2089 extern const char *print_rtx_head;
2090 extern void debug_rtx (rtx);
2091 extern void debug_rtx_list (rtx, int);
2092 extern void debug_rtx_range (rtx, rtx);
2093 extern rtx debug_rtx_find (rtx, int);
2094 extern void print_mem_expr (FILE *, tree);
2095 extern void print_rtl (FILE *, rtx);
2096 extern void print_simple_rtl (FILE *, rtx);
2097 extern int print_rtl_single (FILE *, rtx);
2098 extern void print_inline_rtx (FILE *, rtx, int);
2101 extern void reposition_prologue_and_epilogue_notes (void);
2102 extern int prologue_epilogue_contains (rtx);
2103 extern int sibcall_epilogue_contains (rtx);
2104 extern void mark_temp_addr_taken (rtx);
2105 extern void update_temp_slot_address (rtx, rtx);
2108 extern void expand_null_return (void);
2109 extern void expand_naked_return (void);
2110 extern void emit_jump (rtx);
2113 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2117 extern void print_rtl_with_bb (FILE *, rtx);
2120 extern void dump_reg_info (FILE *);
2121 extern void dump_flow_info (FILE *, int);
2124 extern void init_expmed (void);
2125 extern void expand_inc (rtx, rtx);
2126 extern void expand_dec (rtx, rtx);
2129 extern bool can_copy_p (enum machine_mode);
2130 extern rtx fis_get_condition (rtx);
2133 extern void mark_elimination (int, int);
2134 extern void dump_global_regs (FILE *);
2136 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2137 extern void retry_global_alloc (int, HARD_REG_SET);
2139 extern void build_insn_chain (rtx);
2142 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2143 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2144 extern void globalize_reg (int);
2145 extern void init_reg_modes_once (void);
2146 extern void init_regs (void);
2147 extern void init_fake_stack_mems (void);
2148 extern void init_reg_sets (void);
2149 extern void regclass (rtx, int);
2150 extern void reg_scan (rtx, unsigned int);
2151 extern void fix_register (const char *, int, int);
2153 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2154 enum machine_mode, unsigned int);
2156 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2160 extern void dbr_schedule (rtx);
2162 /* In local-alloc.c */
2163 extern void dump_local_alloc (FILE *);
2166 extern int function_invariant_p (rtx);
2174 LCT_CONST_MAKE_BLOCK = 3,
2175 LCT_PURE_MAKE_BLOCK = 4,
2178 LCT_RETURNS_TWICE = 7
2181 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2183 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2184 enum machine_mode, int, ...);
2187 extern void init_varasm_once (void);
2188 extern enum tls_model decl_default_tls_model (tree);
2191 extern void traverse_md_constants (int (*) (void **, void *), void *);
2192 struct md_constant { char *name, *value; };
2195 extern int read_skip_spaces (FILE *);
2196 extern bool read_rtx (FILE *, rtx *, int *);
2197 extern void copy_rtx_ptr_loc (const void *, const void *);
2198 extern void print_rtx_ptr_loc (const void *);
2199 extern const char *join_c_conditions (const char *, const char *);
2200 extern void print_c_condition (const char *);
2201 extern const char *read_rtx_filename;
2202 extern int read_rtx_lineno;
2205 extern rtx canon_rtx (rtx);
2206 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2207 extern rtx get_addr (rtx);
2208 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2210 extern int read_dependence (rtx, rtx);
2211 extern int anti_dependence (rtx, rtx);
2212 extern int output_dependence (rtx, rtx);
2213 extern void init_alias_once (void);
2214 extern void init_alias_analysis (void);
2215 extern void end_alias_analysis (void);
2216 extern bool memory_modified_in_insn_p (rtx, rtx);
2217 extern rtx find_base_term (rtx);
2218 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2219 extern rtx get_reg_known_value (unsigned int);
2220 extern bool get_reg_known_equiv_p (unsigned int);
2223 extern int stack_regs_mentioned (rtx insn);
2227 extern GTY(()) rtx stack_limit_rtx;
2230 extern void invert_br_probabilities (rtx);
2231 extern bool expensive_function_p (int);
2232 /* In cfgexpand.c */
2233 extern void add_reg_br_prob_note (rtx last, int probability);
2235 extern void tracer (void);
2237 /* In var-tracking.c */
2238 extern unsigned int variable_tracking_main (void);
2240 /* In stor-layout.c. */
2241 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2244 /* In loop-unswitch.c */
2245 extern rtx reversed_condition (rtx);
2246 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2249 extern rtx canon_condition (rtx);
2250 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2254 rtx (*gen_lowpart) (enum machine_mode, rtx);
2255 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2256 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2257 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2258 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2259 unsigned int, unsigned int *);
2260 bool (*reg_truncated_to_mode) (enum machine_mode, rtx);
2262 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2265 /* Each pass can provide its own. */
2266 extern struct rtl_hooks rtl_hooks;
2268 /* ... but then it has to restore these. */
2269 extern const struct rtl_hooks general_rtl_hooks;
2271 /* Keep this for the nonce. */
2272 #define gen_lowpart rtl_hooks.gen_lowpart
2274 extern void insn_locators_alloc (void);
2275 extern void insn_locators_finalize (void);
2276 extern void set_curr_insn_source_location (location_t);
2277 extern void set_curr_insn_block (tree);
2278 extern int curr_insn_locator (void);
2280 #endif /* ! GCC_RTL_H */
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