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 /* Set up in flow.c; empty before then.
745 Holds a chain of INSN_LIST rtx's whose first operands point at
746 previous insns with direct data-flow connections to this one.
747 That means that those insns set variables whose next use is in this insn.
748 They are always in the same basic block as this insn. */
749 #define LOG_LINKS(INSN) XEXP(INSN, 7)
751 #define RTX_FRAME_RELATED_P(RTX) \
752 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
753 JUMP_INSN, BARRIER, SET)->frame_related)
755 /* 1 if RTX is an insn that has been deleted. */
756 #define INSN_DELETED_P(RTX) \
757 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
758 CODE_LABEL, BARRIER, NOTE)->volatil)
760 /* 1 if RTX is a call to a const or pure function. */
761 #define CONST_OR_PURE_CALL_P(RTX) \
762 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
763 EXPR_LIST)->unchanging)
765 /* 1 if RTX is a call_insn for a sibling call. */
766 #define SIBLING_CALL_P(RTX) \
767 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
769 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
770 #define INSN_ANNULLED_BRANCH_P(RTX) \
771 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
773 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
774 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
775 executed if the branch is taken. For annulled branches with this bit
776 clear, the insn should be executed only if the branch is not taken. */
777 #define INSN_FROM_TARGET_P(RTX) \
778 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
780 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
781 See the comments for ADDR_DIFF_VEC in rtl.def. */
782 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
784 /* In a VALUE, the value cselib has assigned to RTX.
785 This is a "struct cselib_val_struct", see cselib.h. */
786 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
788 /* Holds a list of notes on what this insn does to various REGs.
789 It is a chain of EXPR_LIST rtx's, where the second operand is the
790 chain pointer and the first operand is the REG being described.
791 The mode field of the EXPR_LIST contains not a real machine mode
792 but a value from enum reg_note. */
793 #define REG_NOTES(INSN) XEXP(INSN, 8)
797 #define DEF_REG_NOTE(NAME) NAME,
798 #include "reg-notes.def"
803 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
804 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
805 #define PUT_REG_NOTE_KIND(LINK, KIND) \
806 PUT_MODE (LINK, (enum machine_mode) (KIND))
808 /* Names for REG_NOTE's in EXPR_LIST insn's. */
810 extern const char * const reg_note_name[];
811 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
813 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
814 USE and CLOBBER expressions.
815 USE expressions list the registers filled with arguments that
816 are passed to the function.
817 CLOBBER expressions document the registers explicitly clobbered
819 Pseudo registers can not be mentioned in this list. */
820 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
822 /* The label-number of a code-label. The assembler label
823 is made from `L' and the label-number printed in decimal.
824 Label numbers are unique in a compilation. */
825 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
827 /* In a NOTE that is a line number, this is a string for the file name that the
828 line is in. We use the same field to record block numbers temporarily in
829 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
830 between ints and pointers if we use a different macro for the block number.)
834 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
835 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
836 #ifdef USE_MAPPED_LOCATION
837 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
838 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
839 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
840 #define SET_INSN_DELETED(INSN) \
841 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
843 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
844 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
845 (XLOC).line = NOTE_LINE_NUMBER (INSN))
846 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
847 #define SET_INSN_DELETED(INSN) \
848 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
849 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
851 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
852 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
853 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (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 /* Labels carry a two-bit field composed of the ->jump and ->call
907 bits. This field indicates whether the label is an alternate
908 entry point, and if so, what kind. */
911 LABEL_NORMAL = 0, /* ordinary label */
912 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
913 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
914 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
917 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
919 /* Retrieve the kind of LABEL. */
920 #define LABEL_KIND(LABEL) __extension__ \
921 ({ rtx const _label = (LABEL); \
922 if (GET_CODE (_label) != CODE_LABEL) \
923 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
925 (enum label_kind) ((_label->jump << 1) | _label->call); })
927 /* Set the kind of LABEL. */
928 #define SET_LABEL_KIND(LABEL, KIND) do { \
929 rtx _label = (LABEL); \
930 unsigned int _kind = (KIND); \
931 if (GET_CODE (_label) != CODE_LABEL) \
932 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
934 _label->jump = ((_kind >> 1) & 1); \
935 _label->call = (_kind & 1); \
940 /* Retrieve the kind of LABEL. */
941 #define LABEL_KIND(LABEL) \
942 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
944 /* Set the kind of LABEL. */
945 #define SET_LABEL_KIND(LABEL, KIND) do { \
946 rtx _label = (LABEL); \
947 unsigned int _kind = (KIND); \
948 _label->jump = ((_kind >> 1) & 1); \
949 _label->call = (_kind & 1); \
952 #endif /* rtl flag checking */
954 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
956 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
957 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
958 be decremented and possibly the label can be deleted. */
959 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
961 /* Once basic blocks are found in flow.c,
962 each CODE_LABEL starts a chain that goes through
963 all the LABEL_REFs that jump to that label.
964 The chain eventually winds up at the CODE_LABEL: it is circular. */
965 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
967 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
968 the number the register originally had; for a pseudo register turned into
969 a hard reg this will hold the old pseudo register number. */
971 #define REGNO(RTX) XCUINT (RTX, 0, REG)
972 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
974 /* 1 if RTX is a reg or parallel that is the current function's return
976 #define REG_FUNCTION_VALUE_P(RTX) \
977 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
979 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
980 #define REG_USERVAR_P(RTX) \
981 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
983 /* 1 if RTX is a reg that holds a pointer value. */
984 #define REG_POINTER(RTX) \
985 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
987 /* 1 if RTX is a mem that holds a pointer value. */
988 #define MEM_POINTER(RTX) \
989 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
991 /* 1 if the given register REG corresponds to a hard register. */
992 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
994 /* 1 if the given register number REG_NO corresponds to a hard register. */
995 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
997 /* For a CONST_INT rtx, INTVAL extracts the integer. */
998 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
999 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1001 /* For a CONST_DOUBLE:
1002 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1003 low-order word and ..._HIGH the high-order.
1004 For a float, there is a REAL_VALUE_TYPE structure, and
1005 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1006 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1007 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1008 #define CONST_DOUBLE_REAL_VALUE(r) \
1009 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1011 /* For a CONST_VECTOR, return element #n. */
1012 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1014 /* For a CONST_VECTOR, return the number of elements in a vector. */
1015 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1017 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1018 SUBREG_BYTE extracts the byte-number. */
1020 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1021 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1024 /* Return the right cost to give to an operation
1025 to make the cost of the corresponding register-to-register instruction
1026 N times that of a fast register-to-register instruction. */
1027 #define COSTS_N_INSNS(N) ((N) * 4)
1029 /* Maximum cost of an rtl expression. This value has the special meaning
1030 not to use an rtx with this cost under any circumstances. */
1031 #define MAX_COST INT_MAX
1033 extern void init_rtlanal (void);
1034 extern int rtx_cost (rtx, enum rtx_code);
1035 extern int address_cost (rtx, enum machine_mode);
1036 extern unsigned int subreg_lsb (rtx);
1037 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1039 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1040 unsigned int, enum machine_mode);
1041 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1042 unsigned int, enum machine_mode);
1043 extern unsigned int subreg_regno (rtx);
1044 extern unsigned int subreg_nregs (rtx);
1045 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1046 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1047 extern bool constant_pool_constant_p (rtx);
1048 extern bool truncated_to_mode (enum machine_mode, rtx);
1051 /* 1 if RTX is a subreg containing a reg that is already known to be
1052 sign- or zero-extended from the mode of the subreg to the mode of
1053 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1056 When used as a LHS, is means that this extension must be done
1057 when assigning to SUBREG_REG. */
1059 #define SUBREG_PROMOTED_VAR_P(RTX) \
1060 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1062 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1064 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1066 _rtx->volatil = 1; \
1068 _rtx->volatil = 0; \
1069 _rtx->unchanging = (VAL); \
1072 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1073 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1074 ? -1 : (RTX)->unchanging)
1076 /* Access various components of an ASM_OPERANDS rtx. */
1078 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1079 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1080 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1081 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1082 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1083 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1084 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1085 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1086 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1087 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1088 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1089 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1090 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1091 #ifdef USE_MAPPED_LOCATION
1092 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1094 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1095 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1098 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1099 #define MEM_READONLY_P(RTX) \
1100 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1102 /* 1 if RTX is a mem and we should keep the alias set for this mem
1103 unchanged when we access a component. Set to 1, or example, when we
1104 are already in a non-addressable component of an aggregate. */
1105 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1106 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1108 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1109 #define MEM_VOLATILE_P(RTX) \
1110 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1111 ASM_INPUT)->volatil)
1113 /* 1 if RTX is a mem that refers to an aggregate, either to the
1114 aggregate itself or to a field of the aggregate. If zero, RTX may
1115 or may not be such a reference. */
1116 #define MEM_IN_STRUCT_P(RTX) \
1117 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1119 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1120 not refer to a scalar. */
1121 #define MEM_SCALAR_P(RTX) \
1122 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1124 /* 1 if RTX is a mem that cannot trap. */
1125 #define MEM_NOTRAP_P(RTX) \
1126 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1128 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1129 RTX. Otherwise, vice versa. Use this macro only when you are
1130 *sure* that you know that the MEM is in a structure, or is a
1131 scalar. VAL is evaluated only once. */
1132 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1136 MEM_IN_STRUCT_P (RTX) = 1; \
1137 MEM_SCALAR_P (RTX) = 0; \
1141 MEM_IN_STRUCT_P (RTX) = 0; \
1142 MEM_SCALAR_P (RTX) = 1; \
1146 /* The memory attribute block. We provide access macros for each value
1147 in the block and provide defaults if none specified. */
1148 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1150 /* The register attribute block. We provide access macros for each value
1151 in the block and provide defaults if none specified. */
1152 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1154 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1155 set, and may alias anything. Otherwise, the MEM can only alias
1156 MEMs in a conflicting alias set. This value is set in a
1157 language-dependent manner in the front-end, and should not be
1158 altered in the back-end. These set numbers are tested with
1159 alias_sets_conflict_p. */
1160 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1162 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1163 refer to part of a DECL. It may also be a COMPONENT_REF. */
1164 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1166 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1167 RTX that is always a CONST_INT. */
1168 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1170 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1171 is always a CONST_INT. */
1172 #define MEM_SIZE(RTX) \
1173 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1174 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1177 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1178 mode as a default when STRICT_ALIGNMENT, but not if not. */
1179 #define MEM_ALIGN(RTX) \
1180 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1181 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1182 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1184 /* For a REG rtx, the decl it is known to refer to, if it is known to
1185 refer to part of a DECL. */
1186 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1188 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1189 RTX that is always a CONST_INT. */
1190 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1192 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1193 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1194 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1195 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1196 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1197 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1198 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1199 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1200 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1201 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1203 /* 1 if RTX is a label_ref for a nonlocal label. */
1204 /* Likewise in an expr_list for a reg_label note. */
1205 #define LABEL_REF_NONLOCAL_P(RTX) \
1206 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1207 REG_LABEL)->volatil)
1209 /* 1 if RTX is a code_label that should always be considered to be needed. */
1210 #define LABEL_PRESERVE_P(RTX) \
1211 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1213 /* During sched, 1 if RTX is an insn that must be scheduled together
1214 with the preceding insn. */
1215 #define SCHED_GROUP_P(RTX) \
1216 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1219 /* For a SET rtx, SET_DEST is the place that is set
1220 and SET_SRC is the value it is set to. */
1221 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1222 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1223 #define SET_IS_RETURN_P(RTX) \
1224 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1226 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1227 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1228 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1230 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1231 conditionally executing the code on, COND_EXEC_CODE is the code
1232 to execute if the condition is true. */
1233 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1234 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1236 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1238 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1239 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1241 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1242 tree constant pool. This information is private to varasm.c. */
1243 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1244 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1245 (RTX), SYMBOL_REF)->frame_related)
1247 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1248 #define SYMBOL_REF_FLAG(RTX) \
1249 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1251 /* 1 if RTX is a symbol_ref that has been the library function in
1252 emit_library_call. */
1253 #define SYMBOL_REF_USED(RTX) \
1254 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1256 /* 1 if RTX is a symbol_ref for a weak symbol. */
1257 #define SYMBOL_REF_WEAK(RTX) \
1258 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1260 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1261 SYMBOL_REF_CONSTANT. */
1262 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1264 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1266 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1267 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1269 /* The tree (decl or constant) associated with the symbol, or null. */
1270 #define SYMBOL_REF_DECL(RTX) \
1271 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1273 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1274 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1275 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1277 /* The rtx constant pool entry for a symbol, or null. */
1278 #define SYMBOL_REF_CONSTANT(RTX) \
1279 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1281 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1282 information derivable from the tree decl associated with this symbol.
1283 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1284 decl. In some cases this is a bug. But beyond that, it's nice to cache
1285 this information to avoid recomputing it. Finally, this allows space for
1286 the target to store more than one bit of information, as with
1288 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1290 /* These flags are common enough to be defined for all targets. They
1291 are computed by the default version of targetm.encode_section_info. */
1293 /* Set if this symbol is a function. */
1294 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1295 #define SYMBOL_REF_FUNCTION_P(RTX) \
1296 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1297 /* Set if targetm.binds_local_p is true. */
1298 #define SYMBOL_FLAG_LOCAL (1 << 1)
1299 #define SYMBOL_REF_LOCAL_P(RTX) \
1300 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1301 /* Set if targetm.in_small_data_p is true. */
1302 #define SYMBOL_FLAG_SMALL (1 << 2)
1303 #define SYMBOL_REF_SMALL_P(RTX) \
1304 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1305 /* The three-bit field at [5:3] is true for TLS variables; use
1306 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1307 #define SYMBOL_FLAG_TLS_SHIFT 3
1308 #define SYMBOL_REF_TLS_MODEL(RTX) \
1309 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1310 /* Set if this symbol is not defined in this translation unit. */
1311 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1312 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1313 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1314 /* Set if this symbol has a block_symbol structure associated with it. */
1315 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1316 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1317 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1318 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1319 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1320 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1321 #define SYMBOL_REF_ANCHOR_P(RTX) \
1322 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1324 /* Subsequent bits are available for the target to use. */
1325 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1326 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1328 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1329 structure to which the symbol belongs, or NULL if it has not been
1330 assigned a block. */
1331 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1333 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1334 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1335 RTX has not yet been assigned to a block, or it has not been given an
1336 offset within that block. */
1337 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1339 /* Define a macro to look for REG_INC notes,
1340 but save time on machines where they never exist. */
1342 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
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 /* Indicate whether the machine has any sort of auto increment addressing.
1352 If not, we can avoid checking for REG_INC notes. */
1354 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1355 #define AUTO_INC_DEC
1358 #ifndef HAVE_PRE_INCREMENT
1359 #define HAVE_PRE_INCREMENT 0
1362 #ifndef HAVE_PRE_DECREMENT
1363 #define HAVE_PRE_DECREMENT 0
1366 #ifndef HAVE_POST_INCREMENT
1367 #define HAVE_POST_INCREMENT 0
1370 #ifndef HAVE_POST_DECREMENT
1371 #define HAVE_POST_DECREMENT 0
1374 #ifndef HAVE_POST_MODIFY_DISP
1375 #define HAVE_POST_MODIFY_DISP 0
1378 #ifndef HAVE_POST_MODIFY_REG
1379 #define HAVE_POST_MODIFY_REG 0
1382 #ifndef HAVE_PRE_MODIFY_DISP
1383 #define HAVE_PRE_MODIFY_DISP 0
1386 #ifndef HAVE_PRE_MODIFY_REG
1387 #define HAVE_PRE_MODIFY_REG 0
1391 /* Some architectures do not have complete pre/post increment/decrement
1392 instruction sets, or only move some modes efficiently. These macros
1393 allow us to tune autoincrement generation. */
1395 #ifndef USE_LOAD_POST_INCREMENT
1396 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1399 #ifndef USE_LOAD_POST_DECREMENT
1400 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1403 #ifndef USE_LOAD_PRE_INCREMENT
1404 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1407 #ifndef USE_LOAD_PRE_DECREMENT
1408 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1411 #ifndef USE_STORE_POST_INCREMENT
1412 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1415 #ifndef USE_STORE_POST_DECREMENT
1416 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1419 #ifndef USE_STORE_PRE_INCREMENT
1420 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1423 #ifndef USE_STORE_PRE_DECREMENT
1424 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1427 /* Nonzero when we are generating CONCATs. */
1428 extern int generating_concat_p;
1430 /* Nonzero when we are expanding trees to RTL. */
1431 extern int currently_expanding_to_rtl;
1433 /* Generally useful functions. */
1436 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1439 extern void set_stack_check_libfunc (rtx);
1440 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1441 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1444 extern rtvec gen_rtvec (int, ...);
1445 extern rtx copy_insn_1 (rtx);
1446 extern rtx copy_insn (rtx);
1447 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1448 extern rtx emit_copy_of_insn_after (rtx, rtx);
1449 extern void set_reg_attrs_from_mem (rtx, rtx);
1450 extern void set_mem_attrs_from_reg (rtx, rtx);
1451 extern void set_reg_attrs_for_parm (rtx, rtx);
1452 extern int mem_expr_equal_p (tree, tree);
1455 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1456 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1458 extern rtvec rtvec_alloc (int);
1459 extern rtx copy_rtx (rtx);
1460 extern void dump_rtx_statistics (void);
1463 extern rtx copy_rtx_if_shared (rtx);
1466 extern unsigned int rtx_size (rtx);
1467 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1468 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1469 extern int rtx_equal_p (rtx, rtx);
1472 extern rtvec gen_rtvec_v (int, rtx *);
1473 extern rtx gen_reg_rtx (enum machine_mode);
1474 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1475 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1476 extern rtx gen_label_rtx (void);
1477 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1480 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1483 extern rtx gen_highpart (enum machine_mode, rtx);
1484 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1485 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1488 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1489 extern int subreg_lowpart_p (rtx);
1490 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1492 extern unsigned int subreg_highpart_offset (enum machine_mode,
1494 extern rtx make_safe_from (rtx, rtx);
1495 extern rtx convert_memory_address (enum machine_mode, rtx);
1496 extern rtx get_insns (void);
1497 extern const char *get_insn_name (int);
1498 extern rtx get_last_insn (void);
1499 extern rtx get_last_insn_anywhere (void);
1500 extern rtx get_first_nonnote_insn (void);
1501 extern rtx get_last_nonnote_insn (void);
1502 extern void start_sequence (void);
1503 extern void push_to_sequence (rtx);
1504 extern void end_sequence (void);
1505 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1510 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1513 extern rtx force_const_mem (enum machine_mode, rtx);
1518 extern rtx get_pool_constant (rtx);
1519 extern rtx get_pool_constant_mark (rtx, bool *);
1520 extern enum machine_mode get_pool_mode (rtx);
1521 extern rtx simplify_subtraction (rtx);
1524 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1525 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1526 extern rtx assign_stack_temp_for_type (enum machine_mode,
1527 HOST_WIDE_INT, int, tree);
1528 extern rtx assign_temp (tree, int, int, int);
1531 extern rtx emit_insn_before (rtx, rtx);
1532 extern rtx emit_insn_before_noloc (rtx, rtx);
1533 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1534 extern rtx emit_jump_insn_before (rtx, rtx);
1535 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1536 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1537 extern rtx emit_call_insn_before (rtx, rtx);
1538 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1539 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1540 extern rtx emit_barrier_before (rtx);
1541 extern rtx emit_label_before (rtx, rtx);
1542 extern rtx emit_note_before (int, rtx);
1543 extern rtx emit_insn_after (rtx, rtx);
1544 extern rtx emit_insn_after_noloc (rtx, rtx);
1545 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1546 extern rtx emit_jump_insn_after (rtx, rtx);
1547 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1548 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1549 extern rtx emit_call_insn_after (rtx, rtx);
1550 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1551 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1552 extern rtx emit_barrier_after (rtx);
1553 extern rtx emit_label_after (rtx, rtx);
1554 extern rtx emit_note_after (int, rtx);
1555 extern rtx emit_insn (rtx);
1556 extern rtx emit_jump_insn (rtx);
1557 extern rtx emit_call_insn (rtx);
1558 extern rtx emit_label (rtx);
1559 extern rtx emit_barrier (void);
1560 extern rtx emit_note (int);
1561 extern rtx emit_note_copy (rtx);
1562 extern rtx emit_line_note (location_t);
1563 extern rtx make_insn_raw (rtx);
1564 extern rtx make_jump_insn_raw (rtx);
1565 extern void add_function_usage_to (rtx, rtx);
1566 extern rtx last_call_insn (void);
1567 extern rtx previous_insn (rtx);
1568 extern rtx next_insn (rtx);
1569 extern rtx prev_nonnote_insn (rtx);
1570 extern rtx next_nonnote_insn (rtx);
1571 extern rtx prev_real_insn (rtx);
1572 extern rtx next_real_insn (rtx);
1573 extern rtx prev_active_insn (rtx);
1574 extern rtx next_active_insn (rtx);
1575 extern int active_insn_p (rtx);
1576 extern rtx prev_label (rtx);
1577 extern rtx next_label (rtx);
1578 extern rtx skip_consecutive_labels (rtx);
1579 extern rtx next_cc0_user (rtx);
1580 extern rtx prev_cc0_setter (rtx);
1582 /* In cfglayout.c */
1583 extern int insn_line (rtx);
1584 extern const char * insn_file (rtx);
1585 extern int locator_line (int);
1586 extern const char * locator_file (int);
1587 extern int prologue_locator, epilogue_locator;
1590 extern enum rtx_code reverse_condition (enum rtx_code);
1591 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1592 extern enum rtx_code swap_condition (enum rtx_code);
1593 extern enum rtx_code unsigned_condition (enum rtx_code);
1594 extern enum rtx_code signed_condition (enum rtx_code);
1595 extern void mark_jump_label (rtx, rtx, int);
1596 extern unsigned int cleanup_barriers (void);
1599 extern bool squeeze_notes (rtx *, rtx *);
1600 extern rtx delete_related_insns (rtx);
1601 extern void delete_jump (rtx);
1602 extern rtx get_label_before (rtx);
1603 extern rtx get_label_after (rtx);
1604 extern rtx follow_jumps (rtx);
1607 extern rtx *find_constant_term_loc (rtx *);
1610 extern rtx try_split (rtx, rtx, int);
1611 extern int split_branch_probability;
1613 /* In unknown file */
1614 extern rtx split_insns (rtx, rtx);
1616 /* In simplify-rtx.c */
1617 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1618 rtx, enum machine_mode);
1619 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1621 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1623 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1625 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1626 enum machine_mode, rtx, rtx, rtx);
1627 extern rtx simplify_const_relational_operation (enum rtx_code,
1628 enum machine_mode, rtx, rtx);
1629 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1630 enum machine_mode, rtx, rtx);
1631 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1632 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1634 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1635 enum machine_mode, rtx, rtx, rtx);
1636 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1637 enum machine_mode, rtx, rtx);
1638 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1640 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1642 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1643 extern rtx simplify_rtx (rtx);
1644 extern rtx avoid_constant_pool_reference (rtx);
1645 extern bool constant_pool_reference_p (rtx x);
1646 extern bool mode_signbit_p (enum machine_mode, rtx);
1649 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1653 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1655 /* Functions in rtlanal.c */
1657 /* Single set is implemented as macro for performance reasons. */
1658 #define single_set(I) (INSN_P (I) \
1659 ? (GET_CODE (PATTERN (I)) == SET \
1660 ? PATTERN (I) : single_set_1 (I)) \
1662 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1664 /* Structure used for passing data to REPLACE_LABEL. */
1665 typedef struct replace_label_data
1669 bool update_label_nuses;
1670 } replace_label_data;
1672 extern int rtx_addr_can_trap_p (rtx);
1673 extern bool nonzero_address_p (rtx);
1674 extern int rtx_unstable_p (rtx);
1675 extern int rtx_varies_p (rtx, int);
1676 extern int rtx_addr_varies_p (rtx, int);
1677 extern HOST_WIDE_INT get_integer_term (rtx);
1678 extern rtx get_related_value (rtx);
1679 extern int reg_mentioned_p (rtx, rtx);
1680 extern int count_occurrences (rtx, rtx, int);
1681 extern int reg_referenced_p (rtx, rtx);
1682 extern int reg_used_between_p (rtx, rtx, rtx);
1683 extern int reg_set_between_p (rtx, rtx, rtx);
1684 extern int commutative_operand_precedence (rtx);
1685 extern int swap_commutative_operands_p (rtx, rtx);
1686 extern int modified_between_p (rtx, rtx, rtx);
1687 extern int no_labels_between_p (rtx, rtx);
1688 extern int modified_in_p (rtx, rtx);
1689 extern int reg_set_p (rtx, rtx);
1690 extern rtx single_set_2 (rtx, rtx);
1691 extern int multiple_sets (rtx);
1692 extern int set_noop_p (rtx);
1693 extern int noop_move_p (rtx);
1694 extern rtx find_last_value (rtx, rtx *, rtx, int);
1695 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1696 extern int reg_overlap_mentioned_p (rtx, rtx);
1697 extern rtx set_of (rtx, rtx);
1698 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1699 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1700 extern int dead_or_set_p (rtx, rtx);
1701 extern int dead_or_set_regno_p (rtx, unsigned int);
1702 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1703 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1704 extern rtx find_reg_equal_equiv_note (rtx);
1705 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1706 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1707 extern int pure_call_p (rtx);
1708 extern void remove_note (rtx, rtx);
1709 extern int side_effects_p (rtx);
1710 extern int volatile_refs_p (rtx);
1711 extern int volatile_insn_p (rtx);
1712 extern int may_trap_p (rtx);
1713 extern int may_trap_after_code_motion_p (rtx);
1714 extern int may_trap_or_fault_p (rtx);
1715 extern int inequality_comparisons_p (rtx);
1716 extern rtx replace_rtx (rtx, rtx, rtx);
1717 extern int replace_label (rtx *, void *);
1718 extern int rtx_referenced_p (rtx, rtx);
1719 extern bool tablejump_p (rtx, rtx *, rtx *);
1720 extern int computed_jump_p (rtx);
1721 typedef int (*rtx_function) (rtx *, void *);
1722 extern int for_each_rtx (rtx *, rtx_function, void *);
1723 extern rtx regno_use_in (unsigned int, rtx);
1724 extern int auto_inc_p (rtx);
1725 extern int in_expr_list_p (rtx, rtx);
1726 extern void remove_node_from_expr_list (rtx, rtx *);
1727 extern int loc_mentioned_in_p (rtx *, rtx);
1728 extern rtx find_first_parameter_load (rtx, rtx);
1729 extern bool keep_with_call_p (rtx);
1730 extern bool label_is_jump_target_p (rtx, rtx);
1731 extern int insn_rtx_cost (rtx);
1733 /* Given an insn and condition, return a canonical description of
1734 the test being made. */
1735 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1737 /* Given a JUMP_INSN, return a canonical description of the test
1739 extern rtx get_condition (rtx, rtx *, int, int);
1744 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1748 void free_EXPR_LIST_list (rtx *);
1749 void free_INSN_LIST_list (rtx *);
1750 void free_EXPR_LIST_node (rtx);
1751 void free_INSN_LIST_node (rtx);
1752 rtx alloc_INSN_LIST (rtx, rtx);
1753 rtx alloc_EXPR_LIST (int, rtx, rtx);
1754 void remove_free_INSN_LIST_elem (rtx, rtx *);
1755 rtx remove_list_elem (rtx, rtx *);
1759 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1760 Always at least 3, since the combiner could put that many together
1761 and we want this to remain correct for all the remaining passes. */
1763 extern int max_parallel;
1765 /* Free up register info memory. */
1766 extern void free_reg_info (void);
1769 extern int asm_noperands (rtx);
1770 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1771 enum machine_mode *);
1773 extern enum reg_class reg_preferred_class (int);
1774 extern enum reg_class reg_alternate_class (int);
1776 extern void split_all_insns (int);
1777 extern unsigned int split_all_insns_noflow (void);
1779 #define MAX_SAVED_CONST_INT 64
1780 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1782 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1783 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1784 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1785 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1786 extern GTY(()) rtx const_true_rtx;
1788 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1790 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1791 same as VOIDmode. */
1793 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1795 /* Likewise, for the constants 1 and 2. */
1797 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1798 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1800 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1801 is used to represent the frame pointer. This is because the
1802 hard frame pointer and the automatic variables are separated by an amount
1803 that cannot be determined until after register allocation. We can assume
1804 that in this case ELIMINABLE_REGS will be defined, one action of which
1805 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1806 #ifndef HARD_FRAME_POINTER_REGNUM
1807 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1810 /* Index labels for global_rtl. */
1811 enum global_rtl_index
1817 /* For register elimination to work properly these hard_frame_pointer_rtx,
1818 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1819 the same register. */
1820 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1821 GR_ARG_POINTER = GR_FRAME_POINTER,
1823 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1824 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1826 GR_HARD_FRAME_POINTER,
1828 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1829 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1830 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1835 GR_VIRTUAL_INCOMING_ARGS,
1836 GR_VIRTUAL_STACK_ARGS,
1837 GR_VIRTUAL_STACK_DYNAMIC,
1838 GR_VIRTUAL_OUTGOING_ARGS,
1844 /* Pointers to standard pieces of rtx are stored here. */
1845 extern GTY(()) rtx global_rtl[GR_MAX];
1847 /* Standard pieces of rtx, to be substituted directly into things. */
1848 #define pc_rtx (global_rtl[GR_PC])
1849 #define cc0_rtx (global_rtl[GR_CC0])
1851 /* All references to certain hard regs, except those created
1852 by allocating pseudo regs into them (when that's possible),
1853 go through these unique rtx objects. */
1854 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1855 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1856 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1857 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1859 extern GTY(()) rtx pic_offset_table_rtx;
1860 extern GTY(()) rtx static_chain_rtx;
1861 extern GTY(()) rtx static_chain_incoming_rtx;
1862 extern GTY(()) rtx return_address_pointer_rtx;
1864 /* Include the RTL generation functions. */
1866 #ifndef GENERATOR_FILE
1868 #ifndef USE_MAPPED_LOCATION
1869 #undef gen_rtx_ASM_OPERANDS
1870 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1871 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1875 /* There are some RTL codes that require special attention; the
1876 generation functions included above do the raw handling. If you
1877 add to this list, modify special_rtx in gengenrtl.c as well. */
1879 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1880 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1881 extern rtx gen_raw_REG (enum machine_mode, int);
1882 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1883 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1884 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1886 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1888 /* Virtual registers are used during RTL generation to refer to locations into
1889 the stack frame when the actual location isn't known until RTL generation
1890 is complete. The routine instantiate_virtual_regs replaces these with
1891 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1894 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1896 /* This points to the first word of the incoming arguments passed on the stack,
1897 either by the caller or by the callee when pretending it was passed by the
1900 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1902 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1904 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1905 variable on the stack. Otherwise, it points to the first variable on
1908 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1910 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1912 /* This points to the location of dynamically-allocated memory on the stack
1913 immediately after the stack pointer has been adjusted by the amount
1916 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1918 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1920 /* This points to the location in the stack at which outgoing arguments should
1921 be written when the stack is pre-pushed (arguments pushed using push
1922 insns always use sp). */
1924 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1926 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1928 /* This points to the Canonical Frame Address of the function. This
1929 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1930 but is calculated relative to the arg pointer for simplicity; the
1931 frame pointer nor stack pointer are necessarily fixed relative to
1932 the CFA until after reload. */
1934 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1936 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1938 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1940 /* Nonzero if REGNUM is a pointer into the stack frame. */
1941 #define REGNO_PTR_FRAME_P(REGNUM) \
1942 ((REGNUM) == STACK_POINTER_REGNUM \
1943 || (REGNUM) == FRAME_POINTER_REGNUM \
1944 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1945 || (REGNUM) == ARG_POINTER_REGNUM \
1946 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1947 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1949 /* REGNUM never really appearing in the INSN stream. */
1950 #define INVALID_REGNUM (~(unsigned int) 0)
1952 extern rtx output_constant_def (tree, int);
1953 extern rtx lookup_constant_def (tree);
1955 /* Nonzero after the second flow pass has completed.
1956 Set to 1 or 0 by toplev.c */
1957 extern int flow2_completed;
1959 /* Nonzero after end of reload pass.
1960 Set to 1 or 0 by reload1.c. */
1962 extern int reload_completed;
1964 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1965 extern int epilogue_completed;
1967 /* Set to 1 while reload_as_needed is operating.
1968 Required by some machines to handle any generated moves differently. */
1970 extern int reload_in_progress;
1973 /* Nonzero after end of regstack pass.
1974 Set to 1 or 0 by reg-stack.c. */
1975 extern int regstack_completed;
1978 /* If this is nonzero, we do not bother generating VOLATILE
1979 around volatile memory references, and we are willing to
1980 output indirect addresses. If cse is to follow, we reject
1981 indirect addresses so a useful potential cse is generated;
1982 if it is used only once, instruction combination will produce
1983 the same indirect address eventually. */
1984 extern int cse_not_expected;
1986 /* Set to nonzero before life analysis to indicate that it is unsafe to
1987 generate any new pseudo registers. */
1988 extern int no_new_pseudos;
1990 /* Translates rtx code to tree code, for those codes needed by
1991 REAL_ARITHMETIC. The function returns an int because the caller may not
1992 know what `enum tree_code' means. */
1994 extern int rtx_to_tree_code (enum rtx_code);
1997 extern int delete_trivially_dead_insns (rtx, int);
1998 extern int cse_main (rtx, int);
1999 extern int exp_equiv_p (rtx, rtx, int, bool);
2000 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
2003 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2004 extern int condjump_p (rtx);
2005 extern int any_condjump_p (rtx);
2006 extern int any_uncondjump_p (rtx);
2007 extern rtx pc_set (rtx);
2008 extern rtx condjump_label (rtx);
2009 extern int simplejump_p (rtx);
2010 extern int returnjump_p (rtx);
2011 extern int onlyjump_p (rtx);
2012 extern int only_sets_cc0_p (rtx);
2013 extern int sets_cc0_p (rtx);
2014 extern int invert_jump_1 (rtx, rtx);
2015 extern int invert_jump (rtx, rtx, int);
2016 extern int rtx_renumbered_equal_p (rtx, rtx);
2017 extern int true_regnum (rtx);
2018 extern unsigned int reg_or_subregno (rtx);
2019 extern int redirect_jump_1 (rtx, rtx);
2020 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2021 extern int redirect_jump (rtx, rtx, int);
2022 extern void rebuild_jump_labels (rtx);
2023 extern rtx reversed_comparison (rtx, enum machine_mode);
2024 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2025 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2027 extern void delete_for_peephole (rtx, rtx);
2028 extern int condjump_in_parallel_p (rtx);
2030 /* In emit-rtl.c. */
2031 extern int max_reg_num (void);
2032 extern int max_label_num (void);
2033 extern int get_first_label_num (void);
2034 extern void maybe_set_first_label_num (rtx);
2035 extern void delete_insns_since (rtx);
2036 extern void mark_reg_pointer (rtx, int);
2037 extern void mark_user_reg (rtx);
2038 extern void reset_used_flags (rtx);
2039 extern void set_used_flags (rtx);
2040 extern void reorder_insns (rtx, rtx, rtx);
2041 extern void reorder_insns_nobb (rtx, rtx, rtx);
2042 extern int get_max_uid (void);
2043 extern int in_sequence_p (void);
2044 extern void force_next_line_note (void);
2045 extern void init_emit (void);
2046 extern void init_emit_once (int);
2047 extern void push_topmost_sequence (void);
2048 extern void pop_topmost_sequence (void);
2049 extern void set_new_first_and_last_insn (rtx, rtx);
2050 extern unsigned int unshare_all_rtl (void);
2051 extern void unshare_all_rtl_again (rtx);
2052 extern void unshare_all_rtl_in_chain (rtx);
2053 extern void verify_rtl_sharing (void);
2054 extern void set_first_insn (rtx);
2055 extern void set_last_insn (rtx);
2056 extern void link_cc0_insns (rtx);
2057 extern void add_insn (rtx);
2058 extern void add_insn_before (rtx, rtx);
2059 extern void add_insn_after (rtx, rtx);
2060 extern void remove_insn (rtx);
2061 extern rtx emit (rtx);
2062 extern void renumber_insns (void);
2063 extern rtx delete_insn (rtx);
2064 extern rtx entry_of_function (void);
2065 extern void emit_insn_at_entry (rtx);
2066 extern void delete_insn_chain (rtx, rtx);
2067 extern rtx unlink_insn_chain (rtx, rtx);
2068 extern rtx delete_insn_and_edges (rtx);
2069 extern void delete_insn_chain_and_edges (rtx, rtx);
2070 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2071 extern rtx gen_const_mem (enum machine_mode, rtx);
2072 extern rtx gen_frame_mem (enum machine_mode, rtx);
2073 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2074 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2078 extern unsigned int extended_count (rtx, enum machine_mode, int);
2079 extern rtx remove_death (unsigned int, rtx);
2080 extern void dump_combine_stats (FILE *);
2081 extern void dump_combine_total_stats (FILE *);
2083 /* In sched-vis.c. */
2084 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2085 extern void dump_insn_slim (FILE *f, rtx x);
2086 extern void debug_insn_slim (rtx x);
2088 /* In sched-rgn.c. */
2089 extern void schedule_insns (void);
2091 /* In sched-ebb.c. */
2092 extern void schedule_ebbs (void);
2094 /* In haifa-sched.c. */
2095 extern void fix_sched_param (const char *, const char *);
2097 /* In print-rtl.c */
2098 extern const char *print_rtx_head;
2099 extern void debug_rtx (rtx);
2100 extern void debug_rtx_list (rtx, int);
2101 extern void debug_rtx_range (rtx, rtx);
2102 extern rtx debug_rtx_find (rtx, int);
2103 extern void print_mem_expr (FILE *, tree);
2104 extern void print_rtl (FILE *, rtx);
2105 extern void print_simple_rtl (FILE *, rtx);
2106 extern int print_rtl_single (FILE *, rtx);
2107 extern void print_inline_rtx (FILE *, rtx, int);
2110 extern void branch_target_load_optimize (bool);
2113 extern void reposition_prologue_and_epilogue_notes (rtx);
2114 extern void thread_prologue_and_epilogue_insns (rtx);
2115 extern int prologue_epilogue_contains (rtx);
2116 extern int sibcall_epilogue_contains (rtx);
2117 extern void mark_temp_addr_taken (rtx);
2118 extern void update_temp_slot_address (rtx, rtx);
2121 extern void expand_null_return (void);
2122 extern void expand_naked_return (void);
2123 extern void emit_jump (rtx);
2126 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2130 extern void delete_dead_jumptables (void);
2131 extern void print_rtl_with_bb (FILE *, rtx);
2132 extern void dump_flow_info (FILE *, int);
2135 extern void init_expmed (void);
2136 extern void expand_inc (rtx, rtx);
2137 extern void expand_dec (rtx, rtx);
2140 extern bool can_copy_p (enum machine_mode);
2141 extern rtx fis_get_condition (rtx);
2144 extern void mark_elimination (int, int);
2145 extern void dump_global_regs (FILE *);
2147 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2148 extern void retry_global_alloc (int, HARD_REG_SET);
2150 extern void build_insn_chain (rtx);
2153 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2154 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2155 extern void globalize_reg (int);
2156 extern void init_reg_modes_once (void);
2157 extern void init_regs (void);
2158 extern void init_fake_stack_mems (void);
2159 extern void init_reg_sets (void);
2160 extern void regclass_init (void);
2161 extern void regclass (rtx, int);
2162 extern void reg_scan (rtx, unsigned int);
2163 extern void reg_scan_update (rtx, rtx, unsigned int);
2164 extern void fix_register (const char *, int, int);
2165 extern void init_subregs_of_mode (void);
2166 extern void record_subregs_of_mode (rtx);
2168 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2169 enum machine_mode, unsigned int);
2171 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2175 extern void dbr_schedule (rtx);
2177 /* In local-alloc.c */
2178 extern void dump_local_alloc (FILE *);
2181 extern int function_invariant_p (rtx);
2189 LCT_CONST_MAKE_BLOCK = 3,
2190 LCT_PURE_MAKE_BLOCK = 4,
2193 LCT_RETURNS_TWICE = 7
2196 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2198 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2199 enum machine_mode, int, ...);
2202 extern void init_varasm_once (void);
2203 extern enum tls_model decl_default_tls_model (tree);
2206 extern void traverse_md_constants (int (*) (void **, void *), void *);
2207 struct md_constant { char *name, *value; };
2210 extern int read_skip_spaces (FILE *);
2211 extern bool read_rtx (FILE *, rtx *, int *);
2212 extern void copy_rtx_ptr_loc (const void *, const void *);
2213 extern void print_rtx_ptr_loc (const void *);
2214 extern const char *join_c_conditions (const char *, const char *);
2215 extern void print_c_condition (const char *);
2216 extern const char *read_rtx_filename;
2217 extern int read_rtx_lineno;
2220 extern void clear_reg_alias_info (rtx);
2221 extern rtx canon_rtx (rtx);
2222 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2223 extern rtx get_addr (rtx);
2224 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2226 extern int read_dependence (rtx, rtx);
2227 extern int anti_dependence (rtx, rtx);
2228 extern int output_dependence (rtx, rtx);
2229 extern void init_alias_once (void);
2230 extern void init_alias_analysis (void);
2231 extern void end_alias_analysis (void);
2232 extern bool memory_modified_in_insn_p (rtx, rtx);
2233 extern rtx find_base_term (rtx);
2234 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2235 extern rtx get_reg_known_value (unsigned int);
2236 extern bool get_reg_known_equiv_p (unsigned int);
2239 extern int stack_regs_mentioned (rtx insn);
2243 extern GTY(()) rtx stack_limit_rtx;
2246 extern void invert_br_probabilities (rtx);
2247 extern bool expensive_function_p (int);
2248 /* In cfgexpand.c */
2249 extern void add_reg_br_prob_note (rtx last, int probability);
2251 extern void tracer (unsigned int);
2253 /* In var-tracking.c */
2254 extern unsigned int variable_tracking_main (void);
2256 /* In stor-layout.c. */
2257 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2260 /* In loop-unswitch.c */
2261 extern rtx reversed_condition (rtx);
2262 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2265 extern rtx canon_condition (rtx);
2266 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2270 rtx (*gen_lowpart) (enum machine_mode, rtx);
2271 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2272 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2273 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2274 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2275 unsigned int, unsigned int *);
2276 bool (*reg_truncated_to_mode) (enum machine_mode, rtx);
2278 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2281 /* Each pass can provide its own. */
2282 extern struct rtl_hooks rtl_hooks;
2284 /* ... but then it has to restore these. */
2285 extern const struct rtl_hooks general_rtl_hooks;
2287 /* Keep this for the nonce. */
2288 #define gen_lowpart rtl_hooks.gen_lowpart
2290 #endif /* ! GCC_RTL_H */
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