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 3, 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 COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "statistics.h"
30 #include "fixed-value.h"
33 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
34 #undef FLOAT /* Likewise. */
35 #undef ABS /* Likewise. */
36 #undef PC /* Likewise. */
38 /* Value used by some passes to "recognize" noop moves as valid
40 #define NOOP_MOVE_INSN_CODE INT_MAX
42 /* Register Transfer Language EXPRESSIONS CODES */
44 #define RTX_CODE enum rtx_code
47 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
48 #include "rtl.def" /* rtl expressions are documented here */
51 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
53 Assumes default enum value assignment. */
55 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
56 /* The cast here, saves many elsewhere. */
58 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
61 /* We check bit 0-1 of some rtx class codes in the predicates below. */
63 /* Bit 0 = comparison if 0, arithmetic is 1
64 Bit 1 = 1 if commutative. */
70 /* Must follow the four preceding values. */
77 /* Bit 0 = 1 if constant. */
86 #define RTX_OBJ_MASK (~1)
87 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
88 #define RTX_COMPARE_MASK (~1)
89 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
90 #define RTX_ARITHMETIC_MASK (~1)
91 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
92 #define RTX_BINARY_MASK (~3)
93 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
94 #define RTX_COMMUTATIVE_MASK (~2)
95 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
96 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
98 extern const unsigned char rtx_length[NUM_RTX_CODE];
99 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
101 extern const char * const rtx_name[NUM_RTX_CODE];
102 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
104 extern const char * const rtx_format[NUM_RTX_CODE];
105 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
107 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
108 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
110 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
111 extern const unsigned char rtx_next[NUM_RTX_CODE];
113 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
114 relative to which the offsets are calculated, as explained in rtl.def. */
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align: 8;
120 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
121 unsigned min_after_vec: 1; /* minimum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned max_after_vec: 1; /* maximum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned min_after_base: 1; /* minimum address target label is
127 unsigned max_after_base: 1; /* maximum address target label is
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
133 } addr_diff_vec_flags;
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. If any element is nonzero, it means
138 the value of the corresponding attribute is unknown. */
139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
140 while EXPR can describe a larger underlying object, which might have a
141 stricter alignment; OFFSET is the offset of the MEM within that object. */
142 typedef struct mem_attrs GTY(())
144 alias_set_type alias; /* Memory alias set. */
145 tree expr; /* expr corresponding to MEM. */
146 rtx offset; /* Offset from start of DECL, as CONST_INT. */
147 rtx size; /* Size in bytes, as a CONST_INT. */
148 unsigned int align; /* Alignment of MEM in bits. */
151 /* Structure used to describe the attributes of a REG in similar way as
152 mem_attrs does for MEM above. Note that the OFFSET field is calculated
153 in the same way as for mem_attrs, rather than in the same way as a
154 SUBREG_BYTE. For example, if a big-endian target stores a byte
155 object in the low part of a 4-byte register, the OFFSET field
156 will be -3 rather than 0. */
158 typedef struct reg_attrs GTY(())
160 tree decl; /* decl corresponding to REG. */
161 HOST_WIDE_INT offset; /* Offset from start of DECL. */
164 /* Common union for an element of an rtx. */
169 unsigned int rt_uint;
173 enum machine_mode rt_type;
174 addr_diff_vec_flags rt_addr_diff_vec_flags;
175 struct cselib_val_struct *rt_cselib;
176 struct bitmap_head_def *rt_bit;
178 struct basic_block_def *rt_bb;
181 struct constant_descriptor_rtx *rt_constant;
183 typedef union rtunion_def rtunion;
185 /* This structure remembers the position of a SYMBOL_REF within an
186 object_block structure. A SYMBOL_REF only provides this information
187 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
188 struct block_symbol GTY(()) {
189 /* The usual SYMBOL_REF fields. */
190 rtunion GTY ((skip)) fld[3];
192 /* The block that contains this object. */
193 struct object_block *block;
195 /* The offset of this object from the start of its block. It is negative
196 if the symbol has not yet been assigned an offset. */
197 HOST_WIDE_INT offset;
201 DEF_VEC_ALLOC_P(rtx,heap);
202 DEF_VEC_ALLOC_P(rtx,gc);
204 /* Describes a group of objects that are to be placed together in such
205 a way that their relative positions are known. */
206 struct object_block GTY(())
208 /* The section in which these objects should be placed. */
211 /* The alignment of the first object, measured in bits. */
212 unsigned int alignment;
214 /* The total size of the objects, measured in bytes. */
217 /* The SYMBOL_REFs for each object. The vector is sorted in
218 order of increasing offset and the following conditions will
219 hold for each element X:
221 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
222 !SYMBOL_REF_ANCHOR_P (X)
223 SYMBOL_REF_BLOCK (X) == [address of this structure]
224 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
225 VEC(rtx,gc) *objects;
227 /* All the anchor SYMBOL_REFs used to address these objects, sorted
228 in order of increasing offset, and then increasing TLS model.
229 The following conditions will hold for each element X in this vector:
231 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
232 SYMBOL_REF_ANCHOR_P (X)
233 SYMBOL_REF_BLOCK (X) == [address of this structure]
234 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
235 VEC(rtx,gc) *anchors;
238 /* RTL expression ("rtx"). */
240 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
241 chain_prev ("RTX_PREV (&%h)")))
243 /* The kind of expression this is. */
244 ENUM_BITFIELD(rtx_code) code: 16;
246 /* The kind of value the expression has. */
247 ENUM_BITFIELD(machine_mode) mode : 8;
249 /* 1 in a MEM if we should keep the alias set for this mem unchanged
250 when we access a component.
251 1 in a CALL_INSN if it is a sibling call.
252 1 in a SET that is for a return.
253 In a CODE_LABEL, part of the two-bit alternate entry field. */
254 unsigned int jump : 1;
255 /* In a CODE_LABEL, part of the two-bit alternate entry field.
256 1 in a MEM if it cannot trap. */
257 unsigned int call : 1;
258 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
259 1 in a SUBREG if it references an unsigned object whose mode has been
260 from a promoted to a wider mode.
261 1 in a SYMBOL_REF if it addresses something in the per-function
263 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
264 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
265 unsigned int unchanging : 1;
266 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
267 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
268 if it has been deleted.
269 1 in a REG expression if corresponds to a variable declared by the user,
270 0 for an internally generated temporary.
271 1 in a SUBREG with a negative value.
272 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
274 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
275 unsigned int volatil : 1;
276 /* 1 in a MEM referring to a field of an aggregate.
277 0 if the MEM was a variable or the result of a * operator in C;
278 1 if it was the result of a . or -> operator (on a struct) in C.
279 1 in a REG if the register is used only in exit code a loop.
280 1 in a SUBREG expression if was generated from a variable with a
282 1 in a CODE_LABEL if the label is used for nonlocal gotos
283 and must not be deleted even if its count is zero.
284 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
285 together with the preceding insn. Valid only within sched.
286 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
287 from the target of a branch. Valid from reorg until end of compilation;
288 cleared before used. */
289 unsigned int in_struct : 1;
290 /* At the end of RTL generation, 1 if this rtx is used. This is used for
291 copying shared structure. See `unshare_all_rtl'.
292 In a REG, this is not needed for that purpose, and used instead
293 in `leaf_renumber_regs_insn'.
294 1 in a SYMBOL_REF, means that emit_library_call
295 has used it as the function. */
296 unsigned int used : 1;
297 /* 1 in an INSN or a SET if this rtx is related to the call frame,
298 either changing how we compute the frame address or saving and
299 restoring registers in the prologue and epilogue.
300 1 in a REG or MEM if it is a pointer.
301 1 in a SYMBOL_REF if it addresses something in the per-function
302 constant string pool. */
303 unsigned frame_related : 1;
304 /* 1 in a REG or PARALLEL that is the current function's return value.
305 1 in a MEM if it refers to a scalar.
306 1 in a SYMBOL_REF for a weak symbol. */
307 unsigned return_val : 1;
309 /* The first element of the operands of this rtx.
310 The number of operands and their types are controlled
311 by the `code' field, according to rtl.def. */
314 HOST_WIDE_INT hwint[1];
315 struct block_symbol block_sym;
316 struct real_value rv;
317 struct fixed_value fv;
318 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
321 /* The size in bytes of an rtx header (code, mode and flags). */
322 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
324 /* The size in bytes of an rtx with code CODE. */
325 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
327 #define NULL_RTX (rtx) 0
329 /* The "next" and "previous" RTX, relative to this one. */
331 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
332 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
334 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
336 #define RTX_PREV(X) ((INSN_P (X) \
340 && PREV_INSN (X) != NULL \
341 && NEXT_INSN (PREV_INSN (X)) == X \
342 ? PREV_INSN (X) : NULL)
344 /* Define macros to access the `code' field of the rtx. */
346 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
347 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
349 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
350 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
352 /* RTL vector. These appear inside RTX's when there is a need
353 for a variable number of things. The principle use is inside
354 PARALLEL expressions. */
356 struct rtvec_def GTY(()) {
357 int num_elem; /* number of elements */
358 rtx GTY ((length ("%h.num_elem"))) elem[1];
361 #define NULL_RTVEC (rtvec) 0
363 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
364 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
366 /* Predicate yielding nonzero iff X is an rtx for a register. */
367 #define REG_P(X) (GET_CODE (X) == REG)
369 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
370 #define MEM_P(X) (GET_CODE (X) == MEM)
372 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
373 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
375 /* Predicate yielding nonzero iff X is a label insn. */
376 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
378 /* Predicate yielding nonzero iff X is a jump insn. */
379 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
381 /* Predicate yielding nonzero iff X is a call insn. */
382 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
384 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
385 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
387 /* Predicate yielding nonzero iff X is a real insn. */
389 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
391 /* Predicate yielding nonzero iff X is a note insn. */
392 #define NOTE_P(X) (GET_CODE (X) == NOTE)
394 /* Predicate yielding nonzero iff X is a barrier insn. */
395 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
397 /* Predicate yielding nonzero iff X is a data for a jump table. */
398 #define JUMP_TABLE_DATA_P(INSN) \
399 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
400 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
402 /* 1 if X is a unary operator. */
405 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
407 /* 1 if X is a binary operator. */
409 #define BINARY_P(X) \
410 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
412 /* 1 if X is an arithmetic operator. */
414 #define ARITHMETIC_P(X) \
415 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
416 == RTX_ARITHMETIC_RESULT)
418 /* 1 if X is an arithmetic operator. */
420 #define COMMUTATIVE_ARITH_P(X) \
421 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
423 /* 1 if X is a commutative arithmetic operator or a comparison operator.
424 These two are sometimes selected together because it is possible to
425 swap the two operands. */
427 #define SWAPPABLE_OPERANDS_P(X) \
428 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
429 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
430 | (1 << RTX_COMPARE)))
432 /* 1 if X is a non-commutative operator. */
434 #define NON_COMMUTATIVE_P(X) \
435 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
436 == RTX_NON_COMMUTATIVE_RESULT)
438 /* 1 if X is a commutative operator on integers. */
440 #define COMMUTATIVE_P(X) \
441 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
442 == RTX_COMMUTATIVE_RESULT)
444 /* 1 if X is a relational operator. */
446 #define COMPARISON_P(X) \
447 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
449 /* 1 if X is a constant value that is an integer. */
451 #define CONSTANT_P(X) \
452 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
454 /* 1 if X can be used to represent an object. */
455 #define OBJECT_P(X) \
456 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
458 /* General accessor macros for accessing the fields of an rtx. */
460 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
461 /* The bit with a star outside the statement expr and an & inside is
462 so that N can be evaluated only once. */
463 #define RTL_CHECK1(RTX, N, C1) __extension__ \
464 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
465 const enum rtx_code _code = GET_CODE (_rtx); \
466 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
467 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
469 if (GET_RTX_FORMAT(_code)[_n] != C1) \
470 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
472 &_rtx->u.fld[_n]; }))
474 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
475 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
476 const enum rtx_code _code = GET_CODE (_rtx); \
477 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
478 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
480 if (GET_RTX_FORMAT(_code)[_n] != C1 \
481 && GET_RTX_FORMAT(_code)[_n] != C2) \
482 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
484 &_rtx->u.fld[_n]; }))
486 #define RTL_CHECKC1(RTX, N, C) __extension__ \
487 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
488 if (GET_CODE (_rtx) != (C)) \
489 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
491 &_rtx->u.fld[_n]; }))
493 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
494 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
495 const enum rtx_code _code = GET_CODE (_rtx); \
496 if (_code != (C1) && _code != (C2)) \
497 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
499 &_rtx->u.fld[_n]; }))
501 #define RTVEC_ELT(RTVEC, I) __extension__ \
502 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
503 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
504 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
506 &_rtvec->elem[_i]; }))
508 #define XWINT(RTX, N) __extension__ \
509 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
510 const enum rtx_code _code = GET_CODE (_rtx); \
511 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
512 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
514 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
515 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
517 &_rtx->u.hwint[_n]; }))
519 #define XCWINT(RTX, N, C) __extension__ \
520 (*({ __typeof (RTX) const _rtx = (RTX); \
521 if (GET_CODE (_rtx) != (C)) \
522 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
524 &_rtx->u.hwint[N]; }))
526 #define XCMWINT(RTX, N, C, M) __extension__ \
527 (*({ __typeof (RTX) const _rtx = (RTX); \
528 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
529 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
530 __LINE__, __FUNCTION__); \
531 &_rtx->u.hwint[N]; }))
533 #define XCNMPRV(RTX, C, M) __extension__ \
534 ({ __typeof (RTX) const _rtx = (RTX); \
535 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
536 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
537 __LINE__, __FUNCTION__); \
540 #define XCNMPFV(RTX, C, M) __extension__ \
541 ({ __typeof (RTX) const _rtx = (RTX); \
542 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
543 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
544 __LINE__, __FUNCTION__); \
547 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
548 ({ __typeof (RTX) const _symbol = (RTX); \
549 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
550 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
551 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
553 &_symbol->u.block_sym; })
555 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
558 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
561 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
564 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
567 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
568 const char *, int, const char *)
570 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
571 bool, const char *, int, const char *)
573 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
575 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
579 #else /* not ENABLE_RTL_CHECKING */
581 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
582 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
583 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
584 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
585 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
586 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
587 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
588 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
589 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
590 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
591 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
592 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
596 /* General accessor macros for accessing the flags of an rtx. */
598 /* Access an individual rtx flag, with no checking of any kind. */
599 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
601 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
602 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
603 ({ __typeof (RTX) const _rtx = (RTX); \
604 if (GET_CODE(_rtx) != C1) \
605 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
609 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
610 ({ __typeof (RTX) const _rtx = (RTX); \
611 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
612 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
616 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
617 ({ __typeof (RTX) const _rtx = (RTX); \
618 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
619 && GET_CODE(_rtx) != C3) \
620 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
624 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
625 ({ __typeof (RTX) const _rtx = (RTX); \
626 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
627 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
628 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
632 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
633 ({ __typeof (RTX) const _rtx = (RTX); \
634 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
635 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
636 && GET_CODE(_rtx) != C5) \
637 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
641 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
643 ({ __typeof (RTX) const _rtx = (RTX); \
644 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
645 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
646 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
647 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
651 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
653 ({ __typeof (RTX) const _rtx = (RTX); \
654 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
655 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
656 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
657 && GET_CODE(_rtx) != C7) \
658 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
662 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
664 ({ __typeof (RTX) const _rtx = (RTX); \
665 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
666 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
667 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
668 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
669 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
673 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
678 #else /* not ENABLE_RTL_FLAG_CHECKING */
680 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
681 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
682 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
683 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
684 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
685 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
686 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
687 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
690 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
691 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
692 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
693 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
694 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
695 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
696 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
697 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
698 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
700 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
701 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
703 /* These are like XINT, etc. except that they expect a '0' field instead
704 of the normal type code. */
706 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
707 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
708 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
709 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
710 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
711 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
712 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
713 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
714 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
715 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
716 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
717 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
718 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
719 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
721 /* Access a '0' field with any type. */
722 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
724 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
725 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
726 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
727 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
728 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
729 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
730 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
731 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
732 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
733 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
735 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
736 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
738 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
740 /* ACCESS MACROS for particular fields of insns. */
742 /* Holds a unique number for each insn.
743 These are not necessarily sequentially increasing. */
744 #define INSN_UID(INSN) XINT (INSN, 0)
746 /* Chain insns together in sequence. */
747 #define PREV_INSN(INSN) XEXP (INSN, 1)
748 #define NEXT_INSN(INSN) XEXP (INSN, 2)
750 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
751 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
752 /* The body of an insn. */
753 #define PATTERN(INSN) XEXP (INSN, 5)
755 /* Code number of instruction, from when it was recognized.
756 -1 means this instruction has not been recognized yet. */
757 #define INSN_CODE(INSN) XINT (INSN, 6)
759 #define RTX_FRAME_RELATED_P(RTX) \
760 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
761 JUMP_INSN, BARRIER, SET)->frame_related)
763 /* 1 if RTX is an insn that has been deleted. */
764 #define INSN_DELETED_P(RTX) \
765 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
766 CODE_LABEL, BARRIER, NOTE)->volatil)
768 /* 1 if RTX is a call to a const or pure function. */
769 #define CONST_OR_PURE_CALL_P(RTX) \
770 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
771 EXPR_LIST)->unchanging)
773 /* 1 if RTX is a call_insn for a sibling call. */
774 #define SIBLING_CALL_P(RTX) \
775 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
777 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
778 #define INSN_ANNULLED_BRANCH_P(RTX) \
779 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
781 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
782 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
783 executed if the branch is taken. For annulled branches with this bit
784 clear, the insn should be executed only if the branch is not taken. */
785 #define INSN_FROM_TARGET_P(RTX) \
786 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
788 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
789 See the comments for ADDR_DIFF_VEC in rtl.def. */
790 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
792 /* In a VALUE, the value cselib has assigned to RTX.
793 This is a "struct cselib_val_struct", see cselib.h. */
794 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
796 /* Holds a list of notes on what this insn does to various REGs.
797 It is a chain of EXPR_LIST rtx's, where the second operand is the
798 chain pointer and the first operand is the REG being described.
799 The mode field of the EXPR_LIST contains not a real machine mode
800 but a value from enum reg_note. */
801 #define REG_NOTES(INSN) XEXP(INSN, 7)
805 #define DEF_REG_NOTE(NAME) NAME,
806 #include "reg-notes.def"
811 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
812 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
813 #define PUT_REG_NOTE_KIND(LINK, KIND) \
814 PUT_MODE (LINK, (enum machine_mode) (KIND))
816 /* Names for REG_NOTE's in EXPR_LIST insn's. */
818 extern const char * const reg_note_name[];
819 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
821 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
822 USE and CLOBBER expressions.
823 USE expressions list the registers filled with arguments that
824 are passed to the function.
825 CLOBBER expressions document the registers explicitly clobbered
827 Pseudo registers can not be mentioned in this list. */
828 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
830 /* The label-number of a code-label. The assembler label
831 is made from `L' and the label-number printed in decimal.
832 Label numbers are unique in a compilation. */
833 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
835 /* In a NOTE that is a line number, this is a string for the file name that the
836 line is in. We use the same field to record block numbers temporarily in
837 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
838 between ints and pointers if we use a different macro for the block number.)
842 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
843 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
844 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
845 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
846 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
847 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
848 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
850 /* In a NOTE that is a line number, this is the line number.
851 Other kinds of NOTEs are identified by negative numbers here. */
852 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
854 /* Nonzero if INSN is a note marking the beginning of a basic block. */
855 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
856 (GET_CODE (INSN) == NOTE \
857 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
859 /* Variable declaration and the location of a variable. */
860 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
862 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
865 /* Initialization status of the variable in the location. Status
866 can be unknown, uninitialized or initialized. See enumeration
868 #define NOTE_VAR_LOCATION_STATUS(INSN) (XCINT (XCEXP (INSN, 4, NOTE), \
871 /* Possible initialization status of a variable. When requested
872 by the user, this information is tracked and recorded in the DWARF
873 debug information, along with the variable's location. */
876 VAR_INIT_STATUS_UNKNOWN,
877 VAR_INIT_STATUS_UNINITIALIZED,
878 VAR_INIT_STATUS_INITIALIZED
881 /* Codes that appear in the NOTE_KIND field for kinds of notes
882 that are not line numbers. These codes are all negative.
884 Notice that we do not try to use zero here for any of
885 the special note codes because sometimes the source line
886 actually can be zero! This happens (for example) when we
887 are generating code for the per-translation-unit constructor
888 and destructor routines for some C++ translation unit. */
892 #define DEF_INSN_NOTE(NAME) NAME,
893 #include "insn-notes.def"
899 /* Names for NOTE insn's other than line numbers. */
901 extern const char * const note_insn_name[NOTE_INSN_MAX];
902 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
903 (note_insn_name[(NOTE_CODE)])
905 /* The name of a label, in case it corresponds to an explicit label
906 in the input source code. */
907 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
909 /* In jump.c, each label contains a count of the number
910 of LABEL_REFs that point at it, so unused labels can be deleted. */
911 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
913 /* Labels carry a two-bit field composed of the ->jump and ->call
914 bits. This field indicates whether the label is an alternate
915 entry point, and if so, what kind. */
918 LABEL_NORMAL = 0, /* ordinary label */
919 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
920 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
921 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
924 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
926 /* Retrieve the kind of LABEL. */
927 #define LABEL_KIND(LABEL) __extension__ \
928 ({ __typeof (LABEL) const _label = (LABEL); \
929 if (GET_CODE (_label) != CODE_LABEL) \
930 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
932 (enum label_kind) ((_label->jump << 1) | _label->call); })
934 /* Set the kind of LABEL. */
935 #define SET_LABEL_KIND(LABEL, KIND) do { \
936 __typeof (LABEL) const _label = (LABEL); \
937 const unsigned int _kind = (KIND); \
938 if (GET_CODE (_label) != CODE_LABEL) \
939 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
941 _label->jump = ((_kind >> 1) & 1); \
942 _label->call = (_kind & 1); \
947 /* Retrieve the kind of LABEL. */
948 #define LABEL_KIND(LABEL) \
949 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
951 /* Set the kind of LABEL. */
952 #define SET_LABEL_KIND(LABEL, KIND) do { \
953 rtx const _label = (LABEL); \
954 const unsigned int _kind = (KIND); \
955 _label->jump = ((_kind >> 1) & 1); \
956 _label->call = (_kind & 1); \
959 #endif /* rtl flag checking */
961 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
963 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
964 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
965 be decremented and possibly the label can be deleted. */
966 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
968 /* Once basic blocks are found, each CODE_LABEL starts a chain that
969 goes through all the LABEL_REFs that jump to that label. The chain
970 eventually winds up at the CODE_LABEL: it is circular. */
971 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
973 /* For a REG rtx, REGNO extracts the register number. REGNO can only
974 be used on RHS. Use SET_REGNO to change the value. */
975 #define REGNO(RTX) (rhs_regno(RTX))
976 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
978 /* ORIGINAL_REGNO holds the number the register originally had; for a
979 pseudo register turned into a hard reg this will hold the old pseudo
981 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
983 /* Force the REGNO macro to only be used on the lhs. */
984 static inline unsigned int
985 rhs_regno (const_rtx x)
987 return XCUINT (x, 0, REG);
992 /* 1 if RTX is a reg or parallel that is the current function's return
994 #define REG_FUNCTION_VALUE_P(RTX) \
995 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
997 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
998 #define REG_USERVAR_P(RTX) \
999 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1001 /* 1 if RTX is a reg that holds a pointer value. */
1002 #define REG_POINTER(RTX) \
1003 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1005 /* 1 if RTX is a mem that holds a pointer value. */
1006 #define MEM_POINTER(RTX) \
1007 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1009 /* 1 if the given register REG corresponds to a hard register. */
1010 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1012 /* 1 if the given register number REG_NO corresponds to a hard register. */
1013 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1015 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1016 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1017 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1019 /* For a CONST_DOUBLE:
1020 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1021 low-order word and ..._HIGH the high-order.
1022 For a float, there is a REAL_VALUE_TYPE structure, and
1023 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1024 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1025 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1026 #define CONST_DOUBLE_REAL_VALUE(r) \
1027 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1029 #define CONST_FIXED_VALUE(r) \
1030 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1031 #define CONST_FIXED_VALUE_HIGH(r) \
1032 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1033 #define CONST_FIXED_VALUE_LOW(r) \
1034 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1036 /* For a CONST_VECTOR, return element #n. */
1037 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1039 /* For a CONST_VECTOR, return the number of elements in a vector. */
1040 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1042 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1043 SUBREG_BYTE extracts the byte-number. */
1045 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1046 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1049 /* Return the right cost to give to an operation
1050 to make the cost of the corresponding register-to-register instruction
1051 N times that of a fast register-to-register instruction. */
1052 #define COSTS_N_INSNS(N) ((N) * 4)
1054 /* Maximum cost of an rtl expression. This value has the special meaning
1055 not to use an rtx with this cost under any circumstances. */
1056 #define MAX_COST INT_MAX
1058 extern void init_rtlanal (void);
1059 extern int rtx_cost (rtx, enum rtx_code);
1060 extern int address_cost (rtx, enum machine_mode);
1061 extern unsigned int subreg_lsb (const_rtx);
1062 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1064 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1065 unsigned int, enum machine_mode);
1066 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1067 unsigned int, enum machine_mode);
1068 extern unsigned int subreg_regno (const_rtx);
1069 extern unsigned int subreg_nregs (const_rtx);
1070 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1071 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1072 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1073 extern bool constant_pool_constant_p (rtx);
1074 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1077 /* 1 if RTX is a subreg containing a reg that is already known to be
1078 sign- or zero-extended from the mode of the subreg to the mode of
1079 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1082 When used as a LHS, is means that this extension must be done
1083 when assigning to SUBREG_REG. */
1085 #define SUBREG_PROMOTED_VAR_P(RTX) \
1086 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1088 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1090 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1092 _rtx->volatil = 1; \
1094 _rtx->volatil = 0; \
1095 _rtx->unchanging = (VAL); \
1098 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1099 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1100 ? -1 : (RTX)->unchanging)
1102 /* Access various components of an ASM_OPERANDS rtx. */
1104 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1105 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1106 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1107 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1108 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1109 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1110 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1111 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1112 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1113 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1114 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1115 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1116 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1117 #ifdef USE_MAPPED_LOCATION
1118 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1119 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1121 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1122 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1123 #define ASM_INPUT_SOURCE_FILE(RTX) XCSTR (RTX, 1, ASM_INPUT)
1124 #define ASM_INPUT_SOURCE_LINE(RTX) XCINT (RTX, 2, ASM_INPUT)
1127 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1128 #define MEM_READONLY_P(RTX) \
1129 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1131 /* 1 if RTX is a mem and we should keep the alias set for this mem
1132 unchanged when we access a component. Set to 1, or example, when we
1133 are already in a non-addressable component of an aggregate. */
1134 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1135 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1137 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1138 #define MEM_VOLATILE_P(RTX) \
1139 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1140 ASM_INPUT)->volatil)
1142 /* 1 if RTX is a mem that refers to an aggregate, either to the
1143 aggregate itself or to a field of the aggregate. If zero, RTX may
1144 or may not be such a reference. */
1145 #define MEM_IN_STRUCT_P(RTX) \
1146 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1148 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1149 not refer to a scalar. */
1150 #define MEM_SCALAR_P(RTX) \
1151 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1153 /* 1 if RTX is a mem that cannot trap. */
1154 #define MEM_NOTRAP_P(RTX) \
1155 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1157 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1158 RTX. Otherwise, vice versa. Use this macro only when you are
1159 *sure* that you know that the MEM is in a structure, or is a
1160 scalar. VAL is evaluated only once. */
1161 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1165 MEM_IN_STRUCT_P (RTX) = 1; \
1166 MEM_SCALAR_P (RTX) = 0; \
1170 MEM_IN_STRUCT_P (RTX) = 0; \
1171 MEM_SCALAR_P (RTX) = 1; \
1175 /* The memory attribute block. We provide access macros for each value
1176 in the block and provide defaults if none specified. */
1177 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1179 /* The register attribute block. We provide access macros for each value
1180 in the block and provide defaults if none specified. */
1181 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1183 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1184 set, and may alias anything. Otherwise, the MEM can only alias
1185 MEMs in a conflicting alias set. This value is set in a
1186 language-dependent manner in the front-end, and should not be
1187 altered in the back-end. These set numbers are tested with
1188 alias_sets_conflict_p. */
1189 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1191 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1192 refer to part of a DECL. It may also be a COMPONENT_REF. */
1193 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1195 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1196 RTX that is always a CONST_INT. */
1197 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1199 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1200 is always a CONST_INT. */
1201 #define MEM_SIZE(RTX) \
1202 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1203 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1206 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1207 mode as a default when STRICT_ALIGNMENT, but not if not. */
1208 #define MEM_ALIGN(RTX) \
1209 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1210 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1211 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1213 /* For a REG rtx, the decl it is known to refer to, if it is known to
1214 refer to part of a DECL. */
1215 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1217 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1219 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1221 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1222 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1223 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1224 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1225 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1226 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1227 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1228 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1229 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1230 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1232 /* 1 if RTX is a label_ref for a nonlocal label. */
1233 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1234 REG_LABEL_TARGET note. */
1235 #define LABEL_REF_NONLOCAL_P(RTX) \
1236 (RTL_FLAG_CHECK3("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1237 REG_LABEL_OPERAND, REG_LABEL_TARGET)->volatil)
1239 /* 1 if RTX is a code_label that should always be considered to be needed. */
1240 #define LABEL_PRESERVE_P(RTX) \
1241 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1243 /* During sched, 1 if RTX is an insn that must be scheduled together
1244 with the preceding insn. */
1245 #define SCHED_GROUP_P(RTX) \
1246 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1249 /* For a SET rtx, SET_DEST is the place that is set
1250 and SET_SRC is the value it is set to. */
1251 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1252 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1253 #define SET_IS_RETURN_P(RTX) \
1254 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1256 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1257 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1258 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1260 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1261 conditionally executing the code on, COND_EXEC_CODE is the code
1262 to execute if the condition is true. */
1263 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1264 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1266 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1268 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1269 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1271 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1272 tree constant pool. This information is private to varasm.c. */
1273 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1274 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1275 (RTX), SYMBOL_REF)->frame_related)
1277 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1278 #define SYMBOL_REF_FLAG(RTX) \
1279 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1281 /* 1 if RTX is a symbol_ref that has been the library function in
1282 emit_library_call. */
1283 #define SYMBOL_REF_USED(RTX) \
1284 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1286 /* 1 if RTX is a symbol_ref for a weak symbol. */
1287 #define SYMBOL_REF_WEAK(RTX) \
1288 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1290 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1291 SYMBOL_REF_CONSTANT. */
1292 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1294 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1296 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1297 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1299 /* The tree (decl or constant) associated with the symbol, or null. */
1300 #define SYMBOL_REF_DECL(RTX) \
1301 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1303 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1304 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1305 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1307 /* The rtx constant pool entry for a symbol, or null. */
1308 #define SYMBOL_REF_CONSTANT(RTX) \
1309 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1311 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1312 information derivable from the tree decl associated with this symbol.
1313 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1314 decl. In some cases this is a bug. But beyond that, it's nice to cache
1315 this information to avoid recomputing it. Finally, this allows space for
1316 the target to store more than one bit of information, as with
1318 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1320 /* These flags are common enough to be defined for all targets. They
1321 are computed by the default version of targetm.encode_section_info. */
1323 /* Set if this symbol is a function. */
1324 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1325 #define SYMBOL_REF_FUNCTION_P(RTX) \
1326 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1327 /* Set if targetm.binds_local_p is true. */
1328 #define SYMBOL_FLAG_LOCAL (1 << 1)
1329 #define SYMBOL_REF_LOCAL_P(RTX) \
1330 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1331 /* Set if targetm.in_small_data_p is true. */
1332 #define SYMBOL_FLAG_SMALL (1 << 2)
1333 #define SYMBOL_REF_SMALL_P(RTX) \
1334 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1335 /* The three-bit field at [5:3] is true for TLS variables; use
1336 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1337 #define SYMBOL_FLAG_TLS_SHIFT 3
1338 #define SYMBOL_REF_TLS_MODEL(RTX) \
1339 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1340 /* Set if this symbol is not defined in this translation unit. */
1341 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1342 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1343 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1344 /* Set if this symbol has a block_symbol structure associated with it. */
1345 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1346 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1347 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1348 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1349 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1350 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1351 #define SYMBOL_REF_ANCHOR_P(RTX) \
1352 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1354 /* Subsequent bits are available for the target to use. */
1355 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1356 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1358 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1359 structure to which the symbol belongs, or NULL if it has not been
1360 assigned a block. */
1361 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1363 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1364 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1365 RTX has not yet been assigned to a block, or it has not been given an
1366 offset within that block. */
1367 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1369 /* Indicate whether the machine has any sort of auto increment addressing.
1370 If not, we can avoid checking for REG_INC notes. */
1372 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1373 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1374 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1375 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1376 #define AUTO_INC_DEC
1379 /* Define a macro to look for REG_INC notes,
1380 but save time on machines where they never exist. */
1383 #define FIND_REG_INC_NOTE(INSN, REG) \
1384 ((REG) != NULL_RTX && REG_P ((REG)) \
1385 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1386 : find_reg_note ((INSN), REG_INC, (REG)))
1388 #define FIND_REG_INC_NOTE(INSN, REG) 0
1391 #ifndef HAVE_PRE_INCREMENT
1392 #define HAVE_PRE_INCREMENT 0
1395 #ifndef HAVE_PRE_DECREMENT
1396 #define HAVE_PRE_DECREMENT 0
1399 #ifndef HAVE_POST_INCREMENT
1400 #define HAVE_POST_INCREMENT 0
1403 #ifndef HAVE_POST_DECREMENT
1404 #define HAVE_POST_DECREMENT 0
1407 #ifndef HAVE_POST_MODIFY_DISP
1408 #define HAVE_POST_MODIFY_DISP 0
1411 #ifndef HAVE_POST_MODIFY_REG
1412 #define HAVE_POST_MODIFY_REG 0
1415 #ifndef HAVE_PRE_MODIFY_DISP
1416 #define HAVE_PRE_MODIFY_DISP 0
1419 #ifndef HAVE_PRE_MODIFY_REG
1420 #define HAVE_PRE_MODIFY_REG 0
1424 /* Some architectures do not have complete pre/post increment/decrement
1425 instruction sets, or only move some modes efficiently. These macros
1426 allow us to tune autoincrement generation. */
1428 #ifndef USE_LOAD_POST_INCREMENT
1429 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1432 #ifndef USE_LOAD_POST_DECREMENT
1433 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1436 #ifndef USE_LOAD_PRE_INCREMENT
1437 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1440 #ifndef USE_LOAD_PRE_DECREMENT
1441 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1444 #ifndef USE_STORE_POST_INCREMENT
1445 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1448 #ifndef USE_STORE_POST_DECREMENT
1449 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1452 #ifndef USE_STORE_PRE_INCREMENT
1453 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1456 #ifndef USE_STORE_PRE_DECREMENT
1457 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1460 /* Nonzero when we are generating CONCATs. */
1461 extern int generating_concat_p;
1463 /* Nonzero when we are expanding trees to RTL. */
1464 extern int currently_expanding_to_rtl;
1466 /* Generally useful functions. */
1469 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1472 extern void set_stack_check_libfunc (rtx);
1473 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1474 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1477 extern rtx gen_blockage (void);
1478 extern rtvec gen_rtvec (int, ...);
1479 extern rtx copy_insn_1 (rtx);
1480 extern rtx copy_insn (rtx);
1481 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1482 extern rtx emit_copy_of_insn_after (rtx, rtx);
1483 extern void set_reg_attrs_from_value (rtx, rtx);
1484 extern void set_mem_attrs_from_reg (rtx, rtx);
1485 extern void set_reg_attrs_for_parm (rtx, rtx);
1486 extern void adjust_reg_mode (rtx, enum machine_mode);
1487 extern int mem_expr_equal_p (const_tree, const_tree);
1490 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1491 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1493 extern rtvec rtvec_alloc (int);
1494 extern bool shared_const_p (const_rtx);
1495 extern rtx copy_rtx (rtx);
1496 extern void dump_rtx_statistics (void);
1499 extern rtx copy_rtx_if_shared (rtx);
1502 extern unsigned int rtx_size (const_rtx);
1503 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1504 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1505 extern int rtx_equal_p (const_rtx, const_rtx);
1508 extern rtvec gen_rtvec_v (int, rtx *);
1509 extern rtx gen_reg_rtx (enum machine_mode);
1510 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1511 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1512 extern rtx gen_label_rtx (void);
1513 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1516 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1519 extern rtx gen_highpart (enum machine_mode, rtx);
1520 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1521 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1524 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1525 extern int subreg_lowpart_p (const_rtx);
1526 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1528 extern unsigned int subreg_highpart_offset (enum machine_mode,
1530 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1531 extern rtx make_safe_from (rtx, rtx);
1532 extern rtx convert_memory_address (enum machine_mode, rtx);
1533 extern rtx get_insns (void);
1534 extern const char *get_insn_name (int);
1535 extern rtx get_last_insn (void);
1536 extern rtx get_last_insn_anywhere (void);
1537 extern rtx get_first_nonnote_insn (void);
1538 extern rtx get_last_nonnote_insn (void);
1539 extern void start_sequence (void);
1540 extern void push_to_sequence (rtx);
1541 extern void push_to_sequence2 (rtx, rtx);
1542 extern void end_sequence (void);
1543 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1548 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1551 extern rtx force_const_mem (enum machine_mode, rtx);
1556 extern rtx get_pool_constant (rtx);
1557 extern rtx get_pool_constant_mark (rtx, bool *);
1558 extern enum machine_mode get_pool_mode (const_rtx);
1559 extern rtx simplify_subtraction (rtx);
1562 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1563 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1564 extern rtx assign_stack_temp_for_type (enum machine_mode,
1565 HOST_WIDE_INT, int, tree);
1566 extern rtx assign_temp (tree, int, int, int);
1569 extern rtx emit_insn_before (rtx, rtx);
1570 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1571 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1572 extern rtx emit_jump_insn_before (rtx, rtx);
1573 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1574 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1575 extern rtx emit_call_insn_before (rtx, rtx);
1576 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1577 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1578 extern rtx emit_barrier_before (rtx);
1579 extern rtx emit_label_before (rtx, rtx);
1580 extern rtx emit_note_before (enum insn_note, rtx);
1581 extern rtx emit_insn_after (rtx, rtx);
1582 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1583 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1584 extern rtx emit_jump_insn_after (rtx, rtx);
1585 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1586 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1587 extern rtx emit_call_insn_after (rtx, rtx);
1588 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1589 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1590 extern rtx emit_barrier_after (rtx);
1591 extern rtx emit_label_after (rtx, rtx);
1592 extern rtx emit_note_after (enum insn_note, rtx);
1593 extern rtx emit_insn (rtx);
1594 extern rtx emit_jump_insn (rtx);
1595 extern rtx emit_call_insn (rtx);
1596 extern rtx emit_label (rtx);
1597 extern rtx emit_barrier (void);
1598 extern rtx emit_note (enum insn_note);
1599 extern rtx emit_note_copy (rtx);
1600 extern rtx make_insn_raw (rtx);
1601 extern rtx make_jump_insn_raw (rtx);
1602 extern void add_function_usage_to (rtx, rtx);
1603 extern rtx last_call_insn (void);
1604 extern rtx previous_insn (rtx);
1605 extern rtx next_insn (rtx);
1606 extern rtx prev_nonnote_insn (rtx);
1607 extern rtx next_nonnote_insn (rtx);
1608 extern rtx prev_real_insn (rtx);
1609 extern rtx next_real_insn (rtx);
1610 extern rtx prev_active_insn (rtx);
1611 extern rtx next_active_insn (rtx);
1612 extern int active_insn_p (const_rtx);
1613 extern rtx prev_label (rtx);
1614 extern rtx next_label (rtx);
1615 extern rtx skip_consecutive_labels (rtx);
1616 extern rtx next_cc0_user (rtx);
1617 extern rtx prev_cc0_setter (rtx);
1619 /* In cfglayout.c */
1620 extern int insn_line (const_rtx);
1621 extern const char * insn_file (const_rtx);
1622 extern int locator_line (int);
1623 extern const char * locator_file (int);
1624 extern int prologue_locator, epilogue_locator;
1627 extern enum rtx_code reverse_condition (enum rtx_code);
1628 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1629 extern enum rtx_code swap_condition (enum rtx_code);
1630 extern enum rtx_code unsigned_condition (enum rtx_code);
1631 extern enum rtx_code signed_condition (enum rtx_code);
1632 extern void mark_jump_label (rtx, rtx, int);
1633 extern unsigned int cleanup_barriers (void);
1636 extern rtx delete_related_insns (rtx);
1639 extern rtx *find_constant_term_loc (rtx *);
1642 extern rtx try_split (rtx, rtx, int);
1643 extern int split_branch_probability;
1645 /* In unknown file */
1646 extern rtx split_insns (rtx, rtx);
1648 /* In simplify-rtx.c */
1649 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1650 rtx, enum machine_mode);
1651 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1653 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1655 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1657 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1658 enum machine_mode, rtx, rtx, rtx);
1659 extern rtx simplify_const_relational_operation (enum rtx_code,
1660 enum machine_mode, rtx, rtx);
1661 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1662 enum machine_mode, rtx, rtx);
1663 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1664 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1666 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1667 enum machine_mode, rtx, rtx, rtx);
1668 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1669 enum machine_mode, rtx, rtx);
1670 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1672 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1674 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1675 extern rtx simplify_rtx (const_rtx);
1676 extern rtx avoid_constant_pool_reference (rtx);
1677 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1680 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1684 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1685 extern void set_insn_deleted (rtx);
1687 /* Functions in rtlanal.c */
1689 /* Single set is implemented as macro for performance reasons. */
1690 #define single_set(I) (INSN_P (I) \
1691 ? (GET_CODE (PATTERN (I)) == SET \
1692 ? PATTERN (I) : single_set_1 (I)) \
1694 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1696 /* Structure used for passing data to REPLACE_LABEL. */
1697 typedef struct replace_label_data
1701 bool update_label_nuses;
1702 } replace_label_data;
1704 extern int rtx_addr_can_trap_p (const_rtx);
1705 extern bool nonzero_address_p (const_rtx);
1706 extern int rtx_unstable_p (const_rtx);
1707 extern bool rtx_varies_p (const_rtx, bool);
1708 extern bool rtx_addr_varies_p (const_rtx, bool);
1709 extern HOST_WIDE_INT get_integer_term (const_rtx);
1710 extern rtx get_related_value (const_rtx);
1711 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1712 extern void split_const (rtx, rtx *, rtx *);
1713 extern int reg_mentioned_p (const_rtx, const_rtx);
1714 extern int count_occurrences (const_rtx, const_rtx, int);
1715 extern int reg_referenced_p (const_rtx, const_rtx);
1716 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1717 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1718 extern int commutative_operand_precedence (rtx);
1719 extern bool swap_commutative_operands_p (rtx, rtx);
1720 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1721 extern int no_labels_between_p (const_rtx, const_rtx);
1722 extern int modified_in_p (const_rtx, const_rtx);
1723 extern int reg_set_p (const_rtx, const_rtx);
1724 extern rtx single_set_2 (const_rtx, const_rtx);
1725 extern int multiple_sets (const_rtx);
1726 extern int set_noop_p (const_rtx);
1727 extern int noop_move_p (const_rtx);
1728 extern rtx find_last_value (rtx, rtx *, rtx, int);
1729 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1730 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1731 extern const_rtx set_of (const_rtx, const_rtx);
1732 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1733 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1734 extern int dead_or_set_p (const_rtx, const_rtx);
1735 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1736 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1737 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1738 extern rtx find_reg_equal_equiv_note (const_rtx);
1739 extern rtx find_constant_src (const_rtx);
1740 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1741 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1742 extern int pure_call_p (const_rtx);
1743 extern void remove_note (rtx, const_rtx);
1744 extern void remove_reg_equal_equiv_notes (rtx);
1745 extern int side_effects_p (const_rtx);
1746 extern int volatile_refs_p (const_rtx);
1747 extern int volatile_insn_p (const_rtx);
1748 extern int may_trap_p_1 (const_rtx, unsigned);
1749 extern int may_trap_p (const_rtx);
1750 extern int may_trap_after_code_motion_p (const_rtx);
1751 extern int may_trap_or_fault_p (const_rtx);
1752 extern int inequality_comparisons_p (const_rtx);
1753 extern rtx replace_rtx (rtx, rtx, rtx);
1754 extern int replace_label (rtx *, void *);
1755 extern int rtx_referenced_p (rtx, rtx);
1756 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1757 extern int computed_jump_p (const_rtx);
1758 typedef int (*rtx_function) (rtx *, void *);
1759 extern int for_each_rtx (rtx *, rtx_function, void *);
1760 extern rtx regno_use_in (unsigned int, rtx);
1761 extern int auto_inc_p (const_rtx);
1762 extern int in_expr_list_p (const_rtx, const_rtx);
1763 extern void remove_node_from_expr_list (const_rtx, rtx *);
1764 extern int loc_mentioned_in_p (rtx *, const_rtx);
1765 extern rtx find_first_parameter_load (rtx, rtx);
1766 extern bool keep_with_call_p (const_rtx);
1767 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1768 extern int insn_rtx_cost (rtx);
1770 /* Given an insn and condition, return a canonical description of
1771 the test being made. */
1772 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1774 /* Given a JUMP_INSN, return a canonical description of the test
1776 extern rtx get_condition (rtx, rtx *, int, int);
1780 void free_EXPR_LIST_list (rtx *);
1781 void free_INSN_LIST_list (rtx *);
1782 void free_EXPR_LIST_node (rtx);
1783 void free_INSN_LIST_node (rtx);
1784 rtx alloc_INSN_LIST (rtx, rtx);
1785 rtx alloc_EXPR_LIST (int, rtx, rtx);
1786 void remove_free_INSN_LIST_elem (rtx, rtx *);
1787 rtx remove_list_elem (rtx, rtx *);
1791 /* Free up register info memory. */
1792 extern void free_reg_info (void);
1795 extern int asm_noperands (const_rtx);
1796 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1797 enum machine_mode *, location_t *);
1799 extern enum reg_class reg_preferred_class (int);
1800 extern enum reg_class reg_alternate_class (int);
1802 extern void split_all_insns (void);
1803 extern unsigned int split_all_insns_noflow (void);
1805 #define MAX_SAVED_CONST_INT 64
1806 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1808 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1809 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1810 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1811 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1812 extern GTY(()) rtx const_true_rtx;
1814 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1816 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1817 same as VOIDmode. */
1819 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1821 /* Likewise, for the constants 1 and 2. */
1823 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1824 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1826 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1827 is used to represent the frame pointer. This is because the
1828 hard frame pointer and the automatic variables are separated by an amount
1829 that cannot be determined until after register allocation. We can assume
1830 that in this case ELIMINABLE_REGS will be defined, one action of which
1831 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1832 #ifndef HARD_FRAME_POINTER_REGNUM
1833 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1836 /* Index labels for global_rtl. */
1837 enum global_rtl_index
1843 /* For register elimination to work properly these hard_frame_pointer_rtx,
1844 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1845 the same register. */
1846 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1847 GR_ARG_POINTER = GR_FRAME_POINTER,
1849 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1850 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1852 GR_HARD_FRAME_POINTER,
1854 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1855 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1856 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1861 GR_VIRTUAL_INCOMING_ARGS,
1862 GR_VIRTUAL_STACK_ARGS,
1863 GR_VIRTUAL_STACK_DYNAMIC,
1864 GR_VIRTUAL_OUTGOING_ARGS,
1870 /* Pointers to standard pieces of rtx are stored here. */
1871 extern GTY(()) rtx global_rtl[GR_MAX];
1873 /* Standard pieces of rtx, to be substituted directly into things. */
1874 #define pc_rtx (global_rtl[GR_PC])
1875 #define cc0_rtx (global_rtl[GR_CC0])
1877 /* All references to certain hard regs, except those created
1878 by allocating pseudo regs into them (when that's possible),
1879 go through these unique rtx objects. */
1880 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1881 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1882 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1883 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1885 extern GTY(()) rtx pic_offset_table_rtx;
1886 extern GTY(()) rtx static_chain_rtx;
1887 extern GTY(()) rtx static_chain_incoming_rtx;
1888 extern GTY(()) rtx return_address_pointer_rtx;
1890 /* Include the RTL generation functions. */
1892 #ifndef GENERATOR_FILE
1894 #undef gen_rtx_ASM_INPUT
1895 #ifdef USE_MAPPED_LOCATION
1896 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
1897 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
1898 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
1899 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
1901 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
1902 gen_rtx_fmt_ssi (ASM_INPUT, (MODE), (ARG0), "", 0)
1903 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
1904 gen_rtx_fmt_ssi (ASM_INPUT, (MODE), (ARG0), (LOC).file, (LOC).line)
1905 #undef gen_rtx_ASM_OPERANDS
1906 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1907 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1911 /* There are some RTL codes that require special attention; the
1912 generation functions included above do the raw handling. If you
1913 add to this list, modify special_rtx in gengenrtl.c as well. */
1915 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1916 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1917 extern rtx gen_raw_REG (enum machine_mode, int);
1918 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1919 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1920 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1922 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1924 /* Virtual registers are used during RTL generation to refer to locations into
1925 the stack frame when the actual location isn't known until RTL generation
1926 is complete. The routine instantiate_virtual_regs replaces these with
1927 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1930 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1932 /* This points to the first word of the incoming arguments passed on the stack,
1933 either by the caller or by the callee when pretending it was passed by the
1936 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1938 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1940 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1941 variable on the stack. Otherwise, it points to the first variable on
1944 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1946 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1948 /* This points to the location of dynamically-allocated memory on the stack
1949 immediately after the stack pointer has been adjusted by the amount
1952 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1954 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1956 /* This points to the location in the stack at which outgoing arguments should
1957 be written when the stack is pre-pushed (arguments pushed using push
1958 insns always use sp). */
1960 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1962 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1964 /* This points to the Canonical Frame Address of the function. This
1965 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1966 but is calculated relative to the arg pointer for simplicity; the
1967 frame pointer nor stack pointer are necessarily fixed relative to
1968 the CFA until after reload. */
1970 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1972 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1974 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1976 /* Nonzero if REGNUM is a pointer into the stack frame. */
1977 #define REGNO_PTR_FRAME_P(REGNUM) \
1978 ((REGNUM) == STACK_POINTER_REGNUM \
1979 || (REGNUM) == FRAME_POINTER_REGNUM \
1980 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1981 || (REGNUM) == ARG_POINTER_REGNUM \
1982 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1983 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1985 /* REGNUM never really appearing in the INSN stream. */
1986 #define INVALID_REGNUM (~(unsigned int) 0)
1988 extern rtx output_constant_def (tree, int);
1989 extern rtx lookup_constant_def (tree);
1991 /* Nonzero after end of reload pass.
1992 Set to 1 or 0 by reload1.c. */
1994 extern int reload_completed;
1996 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1997 extern int epilogue_completed;
1999 /* Set to 1 while reload_as_needed is operating.
2000 Required by some machines to handle any generated moves differently. */
2002 extern int reload_in_progress;
2004 /* This macro indicates whether you may create a new
2007 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2010 /* Nonzero after end of regstack pass.
2011 Set to 1 or 0 by reg-stack.c. */
2012 extern int regstack_completed;
2015 /* If this is nonzero, we do not bother generating VOLATILE
2016 around volatile memory references, and we are willing to
2017 output indirect addresses. If cse is to follow, we reject
2018 indirect addresses so a useful potential cse is generated;
2019 if it is used only once, instruction combination will produce
2020 the same indirect address eventually. */
2021 extern int cse_not_expected;
2023 /* Translates rtx code to tree code, for those codes needed by
2024 REAL_ARITHMETIC. The function returns an int because the caller may not
2025 know what `enum tree_code' means. */
2027 extern int rtx_to_tree_code (enum rtx_code);
2030 extern int delete_trivially_dead_insns (rtx, int);
2031 extern int cse_main (rtx, int);
2032 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2033 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2036 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2037 extern int condjump_p (const_rtx);
2038 extern int any_condjump_p (const_rtx);
2039 extern int any_uncondjump_p (const_rtx);
2040 extern rtx pc_set (const_rtx);
2041 extern rtx condjump_label (const_rtx);
2042 extern int simplejump_p (const_rtx);
2043 extern int returnjump_p (rtx);
2044 extern int onlyjump_p (const_rtx);
2045 extern int only_sets_cc0_p (const_rtx);
2046 extern int sets_cc0_p (const_rtx);
2047 extern int invert_jump_1 (rtx, rtx);
2048 extern int invert_jump (rtx, rtx, int);
2049 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2050 extern int true_regnum (const_rtx);
2051 extern unsigned int reg_or_subregno (const_rtx);
2052 extern int redirect_jump_1 (rtx, rtx);
2053 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2054 extern int redirect_jump (rtx, rtx, int);
2055 extern void rebuild_jump_labels (rtx);
2056 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2057 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2058 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2059 const_rtx, const_rtx);
2060 extern void delete_for_peephole (rtx, rtx);
2061 extern int condjump_in_parallel_p (const_rtx);
2063 /* In emit-rtl.c. */
2064 extern int max_reg_num (void);
2065 extern int max_label_num (void);
2066 extern int get_first_label_num (void);
2067 extern void maybe_set_first_label_num (rtx);
2068 extern void delete_insns_since (rtx);
2069 extern void mark_reg_pointer (rtx, int);
2070 extern void mark_user_reg (rtx);
2071 extern void reset_used_flags (rtx);
2072 extern void set_used_flags (rtx);
2073 extern void reorder_insns (rtx, rtx, rtx);
2074 extern void reorder_insns_nobb (rtx, rtx, rtx);
2075 extern int get_max_uid (void);
2076 extern int in_sequence_p (void);
2077 extern void force_next_line_note (void);
2078 extern void init_emit (void);
2079 extern void init_emit_regs (void);
2080 extern void init_emit_once (int);
2081 extern void push_topmost_sequence (void);
2082 extern void pop_topmost_sequence (void);
2083 extern void set_new_first_and_last_insn (rtx, rtx);
2084 extern unsigned int unshare_all_rtl (void);
2085 extern void unshare_all_rtl_again (rtx);
2086 extern void unshare_all_rtl_in_chain (rtx);
2087 extern void verify_rtl_sharing (void);
2088 extern void set_first_insn (rtx);
2089 extern void set_last_insn (rtx);
2090 extern void link_cc0_insns (rtx);
2091 extern void add_insn (rtx);
2092 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2093 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2094 extern void remove_insn (rtx);
2095 extern rtx emit (rtx);
2096 extern rtx delete_insn (rtx);
2097 extern rtx entry_of_function (void);
2098 extern void emit_insn_at_entry (rtx);
2099 extern void delete_insn_chain (rtx, rtx, bool);
2100 extern rtx unlink_insn_chain (rtx, rtx);
2101 extern rtx delete_insn_and_edges (rtx);
2102 extern void delete_insn_chain_and_edges (rtx, rtx);
2103 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2104 extern rtx gen_const_mem (enum machine_mode, rtx);
2105 extern rtx gen_frame_mem (enum machine_mode, rtx);
2106 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2107 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2108 const_rtx, unsigned int);
2111 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2112 extern rtx remove_death (unsigned int, rtx);
2113 extern void dump_combine_stats (FILE *);
2114 extern void dump_combine_total_stats (FILE *);
2116 /* In cfgcleanup.c */
2117 extern void delete_dead_jumptables (void);
2119 /* In sched-vis.c. */
2120 extern void print_insn (char *, rtx, int);
2121 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2122 extern void dump_insn_slim (FILE *f, rtx x);
2123 extern void debug_insn_slim (rtx x);
2125 /* In sched-rgn.c. */
2126 extern void schedule_insns (void);
2128 /* In sched-ebb.c. */
2129 extern void schedule_ebbs (void);
2131 /* In haifa-sched.c. */
2132 extern void fix_sched_param (const char *, const char *);
2134 /* In print-rtl.c */
2135 extern const char *print_rtx_head;
2136 extern void debug_rtx (const_rtx);
2137 extern void debug_rtx_list (const_rtx, int);
2138 extern void debug_rtx_range (const_rtx, const_rtx);
2139 extern const_rtx debug_rtx_find (const_rtx, int);
2140 extern void print_mem_expr (FILE *, const_tree);
2141 extern void print_rtl (FILE *, const_rtx);
2142 extern void print_simple_rtl (FILE *, const_rtx);
2143 extern int print_rtl_single (FILE *, const_rtx);
2144 extern void print_inline_rtx (FILE *, const_rtx, int);
2147 extern void reposition_prologue_and_epilogue_notes (void);
2148 extern int prologue_epilogue_contains (const_rtx);
2149 extern int sibcall_epilogue_contains (const_rtx);
2150 extern void mark_temp_addr_taken (rtx);
2151 extern void update_temp_slot_address (rtx, rtx);
2154 extern void expand_null_return (void);
2155 extern void expand_naked_return (void);
2156 extern void emit_jump (rtx);
2159 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2163 extern void print_rtl_with_bb (FILE *, const_rtx);
2166 extern void dump_reg_info (FILE *);
2167 extern void dump_flow_info (FILE *, int);
2170 extern void init_expmed (void);
2171 extern void expand_inc (rtx, rtx);
2172 extern void expand_dec (rtx, rtx);
2175 extern bool can_copy_p (enum machine_mode);
2176 extern rtx fis_get_condition (rtx);
2179 extern void mark_elimination (int, int);
2180 extern void dump_global_regs (FILE *);
2182 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2183 extern void retry_global_alloc (int, HARD_REG_SET);
2187 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2188 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2189 extern void globalize_reg (int);
2190 extern void init_reg_modes_target (void);
2191 extern void init_regs (void);
2192 extern void init_fake_stack_mems (void);
2193 extern void save_register_info (void);
2194 extern void init_reg_sets (void);
2195 extern void regclass (rtx, int);
2196 extern void reg_scan (rtx, unsigned int);
2197 extern void fix_register (const char *, int, int);
2199 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2200 enum machine_mode, unsigned int);
2202 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2206 extern void dbr_schedule (rtx);
2208 /* In local-alloc.c */
2209 extern void dump_local_alloc (FILE *);
2212 extern int function_invariant_p (const_rtx);
2220 LCT_CONST_MAKE_BLOCK = 3,
2221 LCT_PURE_MAKE_BLOCK = 4,
2224 LCT_RETURNS_TWICE = 7
2227 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2229 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2230 enum machine_mode, int, ...);
2233 extern void init_varasm_once (void);
2234 extern enum tls_model decl_default_tls_model (const_tree);
2237 extern void traverse_md_constants (int (*) (void **, void *), void *);
2238 struct md_constant { char *name, *value; };
2241 extern int read_skip_spaces (FILE *);
2242 extern bool read_rtx (FILE *, rtx *, int *);
2243 extern void copy_rtx_ptr_loc (const void *, const void *);
2244 extern void print_rtx_ptr_loc (const void *);
2245 extern const char *join_c_conditions (const char *, const char *);
2246 extern void print_c_condition (const char *);
2247 extern const char *read_rtx_filename;
2248 extern int read_rtx_lineno;
2251 extern rtx canon_rtx (rtx);
2252 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2253 extern rtx get_addr (rtx);
2254 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2255 bool (*)(const_rtx, bool));
2256 extern int read_dependence (const_rtx, const_rtx);
2257 extern int anti_dependence (const_rtx, const_rtx);
2258 extern int output_dependence (const_rtx, const_rtx);
2259 extern void init_alias_target (void);
2260 extern void init_alias_analysis (void);
2261 extern void end_alias_analysis (void);
2262 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2263 extern rtx find_base_term (rtx);
2264 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2265 extern rtx get_reg_known_value (unsigned int);
2266 extern bool get_reg_known_equiv_p (unsigned int);
2269 extern int stack_regs_mentioned (const_rtx insn);
2273 extern GTY(()) rtx stack_limit_rtx;
2276 extern void invert_br_probabilities (rtx);
2277 extern bool expensive_function_p (int);
2278 /* In cfgexpand.c */
2279 extern void add_reg_br_prob_note (rtx last, int probability);
2281 /* In var-tracking.c */
2282 extern unsigned int variable_tracking_main (void);
2284 /* In stor-layout.c. */
2285 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2288 /* In loop-unswitch.c */
2289 extern rtx reversed_condition (rtx);
2290 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2293 extern rtx canon_condition (rtx);
2294 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2298 rtx (*gen_lowpart) (enum machine_mode, rtx);
2299 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2300 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2301 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2302 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2303 unsigned int, unsigned int *);
2304 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2306 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2309 /* Each pass can provide its own. */
2310 extern struct rtl_hooks rtl_hooks;
2312 /* ... but then it has to restore these. */
2313 extern const struct rtl_hooks general_rtl_hooks;
2315 /* Keep this for the nonce. */
2316 #define gen_lowpart rtl_hooks.gen_lowpart
2318 extern void insn_locators_alloc (void);
2319 extern void insn_locators_finalize (void);
2320 extern void set_curr_insn_source_location (location_t);
2321 extern void set_curr_insn_block (tree);
2322 extern int curr_insn_locator (void);
2324 #endif /* ! GCC_RTL_H */
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