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, 2008, 2009
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 GTY(()) mem_attrs
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 alias_set_type alias; /* Memory alias set. */
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 GTY(()) reg_attrs {
159 tree decl; /* decl corresponding to REG. */
160 HOST_WIDE_INT offset; /* Offset from start of DECL. */
163 /* Common union for an element of an rtx. */
168 unsigned int rt_uint;
172 enum machine_mode rt_type;
173 addr_diff_vec_flags rt_addr_diff_vec_flags;
174 struct cselib_val_struct *rt_cselib;
175 struct bitmap_head_def *rt_bit;
177 struct basic_block_def *rt_bb;
180 struct constant_descriptor_rtx *rt_constant;
182 typedef union rtunion_def rtunion;
184 /* This structure remembers the position of a SYMBOL_REF within an
185 object_block structure. A SYMBOL_REF only provides this information
186 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
187 struct GTY(()) block_symbol {
188 /* The usual SYMBOL_REF fields. */
189 rtunion GTY ((skip)) fld[3];
191 /* The block that contains this object. */
192 struct object_block *block;
194 /* The offset of this object from the start of its block. It is negative
195 if the symbol has not yet been assigned an offset. */
196 HOST_WIDE_INT offset;
200 DEF_VEC_ALLOC_P(rtx,heap);
201 DEF_VEC_ALLOC_P(rtx,gc);
203 /* Describes a group of objects that are to be placed together in such
204 a way that their relative positions are known. */
205 struct GTY(()) object_block {
206 /* The section in which these objects should be placed. */
209 /* The alignment of the first object, measured in bits. */
210 unsigned int alignment;
212 /* The total size of the objects, measured in bytes. */
215 /* The SYMBOL_REFs for each object. The vector is sorted in
216 order of increasing offset and the following conditions will
217 hold for each element X:
219 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
220 !SYMBOL_REF_ANCHOR_P (X)
221 SYMBOL_REF_BLOCK (X) == [address of this structure]
222 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
223 VEC(rtx,gc) *objects;
225 /* All the anchor SYMBOL_REFs used to address these objects, sorted
226 in order of increasing offset, and then increasing TLS model.
227 The following conditions will hold for each element X in this vector:
229 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
230 SYMBOL_REF_ANCHOR_P (X)
231 SYMBOL_REF_BLOCK (X) == [address of this structure]
232 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
233 VEC(rtx,gc) *anchors;
236 /* RTL expression ("rtx"). */
238 struct GTY((chain_next ("RTX_NEXT (&%h)"),
239 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
240 /* The kind of expression this is. */
241 ENUM_BITFIELD(rtx_code) code: 16;
243 /* The kind of value the expression has. */
244 ENUM_BITFIELD(machine_mode) mode : 8;
246 /* 1 in a MEM if we should keep the alias set for this mem unchanged
247 when we access a component.
248 1 in a CALL_INSN if it is a sibling call.
249 1 in a SET that is for a return.
250 In a CODE_LABEL, part of the two-bit alternate entry field. */
251 unsigned int jump : 1;
252 /* In a CODE_LABEL, part of the two-bit alternate entry field.
253 1 in a MEM if it cannot trap.
254 1 in a CALL_INSN logically equivalent to
255 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
256 unsigned int call : 1;
257 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
258 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
259 1 in a SYMBOL_REF if it addresses something in the per-function
261 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
262 1 in a NOTE, or EXPR_LIST for a const call.
263 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
264 unsigned int unchanging : 1;
265 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
266 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
267 if it has been deleted.
268 1 in a REG expression if corresponds to a variable declared by the user,
269 0 for an internally generated temporary.
270 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
271 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
273 In a SYMBOL_REF, this flag is used for machine-specific purposes.
274 In a PREFETCH, this flag indicates that it should be considered a scheduling
276 unsigned int volatil : 1;
277 /* 1 in a MEM referring to a field of an aggregate.
278 0 if the MEM was a variable or the result of a * operator in C;
279 1 if it was the result of a . or -> operator (on a struct) in C.
280 1 in a REG if the register is used only in exit code a loop.
281 1 in a SUBREG expression if was generated from a variable with a
283 1 in a CODE_LABEL if the label is used for nonlocal gotos
284 and must not be deleted even if its count is zero.
285 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
286 together with the preceding insn. Valid only within sched.
287 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
288 from the target of a branch. Valid from reorg until end of compilation;
289 cleared before used. */
290 unsigned int in_struct : 1;
291 /* At the end of RTL generation, 1 if this rtx is used. This is used for
292 copying shared structure. See `unshare_all_rtl'.
293 In a REG, this is not needed for that purpose, and used instead
294 in `leaf_renumber_regs_insn'.
295 1 in a SYMBOL_REF, means that emit_library_call
296 has used it as the function. */
297 unsigned int used : 1;
298 /* 1 in an INSN or a SET if this rtx is related to the call frame,
299 either changing how we compute the frame address or saving and
300 restoring registers in the prologue and epilogue.
301 1 in a REG or MEM if it is a pointer.
302 1 in a SYMBOL_REF if it addresses something in the per-function
303 constant string pool. */
304 unsigned frame_related : 1;
305 /* 1 in a REG or PARALLEL that is the current function's return value.
306 1 in a MEM if it refers to a scalar.
307 1 in a SYMBOL_REF for a weak symbol.
308 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
309 unsigned return_val : 1;
311 /* The first element of the operands of this rtx.
312 The number of operands and their types are controlled
313 by the `code' field, according to rtl.def. */
316 HOST_WIDE_INT hwint[1];
317 struct block_symbol block_sym;
318 struct real_value rv;
319 struct fixed_value fv;
320 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
323 /* The size in bytes of an rtx header (code, mode and flags). */
324 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
326 /* The size in bytes of an rtx with code CODE. */
327 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
329 #define NULL_RTX (rtx) 0
331 /* The "next" and "previous" RTX, relative to this one. */
333 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
334 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
336 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
338 #define RTX_PREV(X) ((INSN_P (X) \
342 && PREV_INSN (X) != NULL \
343 && NEXT_INSN (PREV_INSN (X)) == X \
344 ? PREV_INSN (X) : NULL)
346 /* Define macros to access the `code' field of the rtx. */
348 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
349 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
351 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
352 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
354 /* RTL vector. These appear inside RTX's when there is a need
355 for a variable number of things. The principle use is inside
356 PARALLEL expressions. */
358 struct GTY(()) rtvec_def {
359 int num_elem; /* number of elements */
360 rtx GTY ((length ("%h.num_elem"))) elem[1];
363 #define NULL_RTVEC (rtvec) 0
365 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
366 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
368 /* Predicate yielding nonzero iff X is an rtx for a register. */
369 #define REG_P(X) (GET_CODE (X) == REG)
371 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
372 #define MEM_P(X) (GET_CODE (X) == MEM)
374 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
375 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
377 /* Predicate yielding nonzero iff X is a label insn. */
378 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
380 /* Predicate yielding nonzero iff X is a jump insn. */
381 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
383 /* Predicate yielding nonzero iff X is a call insn. */
384 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
386 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
387 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
389 /* Predicate yielding nonzero iff X is a debug note/insn. */
390 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
392 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
393 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
395 /* Nonzero if DEBUG_INSN_P may possibly hold. */
396 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
398 /* Predicate yielding nonzero iff X is a real insn. */
400 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
402 /* Predicate yielding nonzero iff X is a note insn. */
403 #define NOTE_P(X) (GET_CODE (X) == NOTE)
405 /* Predicate yielding nonzero iff X is a barrier insn. */
406 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
408 /* Predicate yielding nonzero iff X is a data for a jump table. */
409 #define JUMP_TABLE_DATA_P(INSN) \
410 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
411 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
413 /* 1 if X is a unary operator. */
416 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
418 /* 1 if X is a binary operator. */
420 #define BINARY_P(X) \
421 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
423 /* 1 if X is an arithmetic operator. */
425 #define ARITHMETIC_P(X) \
426 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
427 == RTX_ARITHMETIC_RESULT)
429 /* 1 if X is an arithmetic operator. */
431 #define COMMUTATIVE_ARITH_P(X) \
432 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
434 /* 1 if X is a commutative arithmetic operator or a comparison operator.
435 These two are sometimes selected together because it is possible to
436 swap the two operands. */
438 #define SWAPPABLE_OPERANDS_P(X) \
439 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
440 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
441 | (1 << RTX_COMPARE)))
443 /* 1 if X is a non-commutative operator. */
445 #define NON_COMMUTATIVE_P(X) \
446 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
447 == RTX_NON_COMMUTATIVE_RESULT)
449 /* 1 if X is a commutative operator on integers. */
451 #define COMMUTATIVE_P(X) \
452 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
453 == RTX_COMMUTATIVE_RESULT)
455 /* 1 if X is a relational operator. */
457 #define COMPARISON_P(X) \
458 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
460 /* 1 if X is a constant value that is an integer. */
462 #define CONSTANT_P(X) \
463 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
465 /* 1 if X can be used to represent an object. */
466 #define OBJECT_P(X) \
467 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
469 /* General accessor macros for accessing the fields of an rtx. */
471 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
472 /* The bit with a star outside the statement expr and an & inside is
473 so that N can be evaluated only once. */
474 #define RTL_CHECK1(RTX, N, C1) __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 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
483 &_rtx->u.fld[_n]; }))
485 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
486 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
487 const enum rtx_code _code = GET_CODE (_rtx); \
488 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
489 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
491 if (GET_RTX_FORMAT(_code)[_n] != C1 \
492 && GET_RTX_FORMAT(_code)[_n] != C2) \
493 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
495 &_rtx->u.fld[_n]; }))
497 #define RTL_CHECKC1(RTX, N, C) __extension__ \
498 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
499 if (GET_CODE (_rtx) != (C)) \
500 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
502 &_rtx->u.fld[_n]; }))
504 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
505 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
506 const enum rtx_code _code = GET_CODE (_rtx); \
507 if (_code != (C1) && _code != (C2)) \
508 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
510 &_rtx->u.fld[_n]; }))
512 #define RTVEC_ELT(RTVEC, I) __extension__ \
513 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
514 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
515 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
517 &_rtvec->elem[_i]; }))
519 #define XWINT(RTX, N) __extension__ \
520 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
521 const enum rtx_code _code = GET_CODE (_rtx); \
522 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
523 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
525 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
526 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
528 &_rtx->u.hwint[_n]; }))
530 #define XCWINT(RTX, N, C) __extension__ \
531 (*({ __typeof (RTX) const _rtx = (RTX); \
532 if (GET_CODE (_rtx) != (C)) \
533 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
535 &_rtx->u.hwint[N]; }))
537 #define XCMWINT(RTX, N, C, M) __extension__ \
538 (*({ __typeof (RTX) const _rtx = (RTX); \
539 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
540 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
541 __LINE__, __FUNCTION__); \
542 &_rtx->u.hwint[N]; }))
544 #define XCNMPRV(RTX, C, M) __extension__ \
545 ({ __typeof (RTX) const _rtx = (RTX); \
546 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
547 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
548 __LINE__, __FUNCTION__); \
551 #define XCNMPFV(RTX, C, M) __extension__ \
552 ({ __typeof (RTX) const _rtx = (RTX); \
553 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
554 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
555 __LINE__, __FUNCTION__); \
558 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
559 ({ __typeof (RTX) const _symbol = (RTX); \
560 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
561 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
562 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
564 &_symbol->u.block_sym; })
566 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
569 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
572 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
575 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
578 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
579 const char *, int, const char *)
581 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
582 bool, const char *, int, const char *)
584 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
586 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
590 #else /* not ENABLE_RTL_CHECKING */
592 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
593 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
594 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
595 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
596 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
597 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
598 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
599 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
600 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
601 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
602 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
603 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
607 /* General accessor macros for accessing the flags of an rtx. */
609 /* Access an individual rtx flag, with no checking of any kind. */
610 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
612 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
613 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
614 ({ __typeof (RTX) const _rtx = (RTX); \
615 if (GET_CODE(_rtx) != C1) \
616 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
620 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
621 ({ __typeof (RTX) const _rtx = (RTX); \
622 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
623 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
627 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
628 ({ __typeof (RTX) const _rtx = (RTX); \
629 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
630 && GET_CODE(_rtx) != C3) \
631 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
635 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
636 ({ __typeof (RTX) const _rtx = (RTX); \
637 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
638 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
639 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
643 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
644 ({ __typeof (RTX) const _rtx = (RTX); \
645 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
646 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
647 && GET_CODE(_rtx) != C5) \
648 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
652 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
654 ({ __typeof (RTX) const _rtx = (RTX); \
655 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
656 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
657 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
658 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
662 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
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) \
669 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
673 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
675 ({ __typeof (RTX) const _rtx = (RTX); \
676 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
677 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
678 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
679 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
680 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
684 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
689 #else /* not ENABLE_RTL_FLAG_CHECKING */
691 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
692 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
693 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
694 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
695 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
696 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
697 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
698 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
701 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
702 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
703 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
704 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
705 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
706 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
707 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
708 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
709 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
711 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
712 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
714 /* These are like XINT, etc. except that they expect a '0' field instead
715 of the normal type code. */
717 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
718 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
719 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
720 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
721 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
722 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
723 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
724 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
725 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
726 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
727 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
728 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
729 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
730 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
732 /* Access a '0' field with any type. */
733 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
735 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
736 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
737 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
738 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
739 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
740 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
741 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
742 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
743 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
744 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
746 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
747 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
749 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
751 /* ACCESS MACROS for particular fields of insns. */
753 /* Holds a unique number for each insn.
754 These are not necessarily sequentially increasing. */
755 #define INSN_UID(INSN) XINT (INSN, 0)
757 /* Chain insns together in sequence. */
758 #define PREV_INSN(INSN) XEXP (INSN, 1)
759 #define NEXT_INSN(INSN) XEXP (INSN, 2)
761 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
762 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
763 /* LOCATION of an RTX if relevant. */
764 #define RTL_LOCATION(X) (INSN_P (X) ? \
765 locator_location (INSN_LOCATOR (x)) \
767 /* LOCATION of current INSN. */
768 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
769 /* The body of an insn. */
770 #define PATTERN(INSN) XEXP (INSN, 5)
772 /* Code number of instruction, from when it was recognized.
773 -1 means this instruction has not been recognized yet. */
774 #define INSN_CODE(INSN) XINT (INSN, 6)
776 #define RTX_FRAME_RELATED_P(RTX) \
777 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
778 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
780 /* 1 if RTX is an insn that has been deleted. */
781 #define INSN_DELETED_P(RTX) \
782 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
783 CALL_INSN, JUMP_INSN, \
784 CODE_LABEL, BARRIER, NOTE)->volatil)
786 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
788 #define RTL_CONST_CALL_P(RTX) \
789 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
791 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
793 #define RTL_PURE_CALL_P(RTX) \
794 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
796 /* 1 if RTX is a call to a const or pure function. */
797 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
798 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
800 /* 1 if RTX is a call to a looping const or pure function. Built from
801 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
802 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
803 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
805 /* 1 if RTX is a call_insn for a sibling call. */
806 #define SIBLING_CALL_P(RTX) \
807 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
809 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
810 #define INSN_ANNULLED_BRANCH_P(RTX) \
811 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
813 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
814 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
815 executed if the branch is taken. For annulled branches with this bit
816 clear, the insn should be executed only if the branch is not taken. */
817 #define INSN_FROM_TARGET_P(RTX) \
818 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
820 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
821 See the comments for ADDR_DIFF_VEC in rtl.def. */
822 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
824 /* In a VALUE, the value cselib has assigned to RTX.
825 This is a "struct cselib_val_struct", see cselib.h. */
826 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
828 /* Holds a list of notes on what this insn does to various REGs.
829 It is a chain of EXPR_LIST rtx's, where the second operand is the
830 chain pointer and the first operand is the REG being described.
831 The mode field of the EXPR_LIST contains not a real machine mode
832 but a value from enum reg_note. */
833 #define REG_NOTES(INSN) XEXP(INSN, 7)
837 #define DEF_REG_NOTE(NAME) NAME,
838 #include "reg-notes.def"
843 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
844 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
845 #define PUT_REG_NOTE_KIND(LINK, KIND) \
846 PUT_MODE (LINK, (enum machine_mode) (KIND))
848 /* Names for REG_NOTE's in EXPR_LIST insn's. */
850 extern const char * const reg_note_name[];
851 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
853 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
854 USE and CLOBBER expressions.
855 USE expressions list the registers filled with arguments that
856 are passed to the function.
857 CLOBBER expressions document the registers explicitly clobbered
859 Pseudo registers can not be mentioned in this list. */
860 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
862 /* The label-number of a code-label. The assembler label
863 is made from `L' and the label-number printed in decimal.
864 Label numbers are unique in a compilation. */
865 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
867 /* In a NOTE that is a line number, this is a string for the file name that the
868 line is in. We use the same field to record block numbers temporarily in
869 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
870 between ints and pointers if we use a different macro for the block number.)
874 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
875 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
876 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
877 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
878 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
879 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
880 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
882 /* In a NOTE that is a line number, this is the line number.
883 Other kinds of NOTEs are identified by negative numbers here. */
884 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
886 /* Nonzero if INSN is a note marking the beginning of a basic block. */
887 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
888 (GET_CODE (INSN) == NOTE \
889 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
891 /* Variable declaration and the location of a variable. */
892 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
893 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
895 /* Initialization status of the variable in the location. Status
896 can be unknown, uninitialized or initialized. See enumeration
898 #define PAT_VAR_LOCATION_STATUS(PAT) \
899 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
901 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
902 #define NOTE_VAR_LOCATION_DECL(NOTE) \
903 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
904 #define NOTE_VAR_LOCATION_LOC(NOTE) \
905 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
906 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
907 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
909 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
910 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
912 /* Accessors for a tree-expanded var location debug insn. */
913 #define INSN_VAR_LOCATION_DECL(INSN) \
914 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
915 #define INSN_VAR_LOCATION_LOC(INSN) \
916 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
917 #define INSN_VAR_LOCATION_STATUS(INSN) \
918 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
920 /* Expand to the RTL that denotes an unknown variable location in a
922 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
924 /* Determine whether X is such an unknown location. */
925 #define VAR_LOC_UNKNOWN_P(X) \
926 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
928 /* 1 if RTX is emitted after a call, but it should take effect before
930 #define NOTE_DURING_CALL_P(RTX) \
931 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
933 /* Possible initialization status of a variable. When requested
934 by the user, this information is tracked and recorded in the DWARF
935 debug information, along with the variable's location. */
938 VAR_INIT_STATUS_UNKNOWN,
939 VAR_INIT_STATUS_UNINITIALIZED,
940 VAR_INIT_STATUS_INITIALIZED
943 /* Codes that appear in the NOTE_KIND field for kinds of notes
944 that are not line numbers. These codes are all negative.
946 Notice that we do not try to use zero here for any of
947 the special note codes because sometimes the source line
948 actually can be zero! This happens (for example) when we
949 are generating code for the per-translation-unit constructor
950 and destructor routines for some C++ translation unit. */
954 #define DEF_INSN_NOTE(NAME) NAME,
955 #include "insn-notes.def"
961 /* Names for NOTE insn's other than line numbers. */
963 extern const char * const note_insn_name[NOTE_INSN_MAX];
964 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
965 (note_insn_name[(NOTE_CODE)])
967 /* The name of a label, in case it corresponds to an explicit label
968 in the input source code. */
969 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
971 /* In jump.c, each label contains a count of the number
972 of LABEL_REFs that point at it, so unused labels can be deleted. */
973 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
975 /* Labels carry a two-bit field composed of the ->jump and ->call
976 bits. This field indicates whether the label is an alternate
977 entry point, and if so, what kind. */
980 LABEL_NORMAL = 0, /* ordinary label */
981 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
982 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
983 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
986 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
988 /* Retrieve the kind of LABEL. */
989 #define LABEL_KIND(LABEL) __extension__ \
990 ({ __typeof (LABEL) const _label = (LABEL); \
991 if (GET_CODE (_label) != CODE_LABEL) \
992 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
994 (enum label_kind) ((_label->jump << 1) | _label->call); })
996 /* Set the kind of LABEL. */
997 #define SET_LABEL_KIND(LABEL, KIND) do { \
998 __typeof (LABEL) const _label = (LABEL); \
999 const unsigned int _kind = (KIND); \
1000 if (GET_CODE (_label) != CODE_LABEL) \
1001 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1003 _label->jump = ((_kind >> 1) & 1); \
1004 _label->call = (_kind & 1); \
1009 /* Retrieve the kind of LABEL. */
1010 #define LABEL_KIND(LABEL) \
1011 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1013 /* Set the kind of LABEL. */
1014 #define SET_LABEL_KIND(LABEL, KIND) do { \
1015 rtx const _label = (LABEL); \
1016 const unsigned int _kind = (KIND); \
1017 _label->jump = ((_kind >> 1) & 1); \
1018 _label->call = (_kind & 1); \
1021 #endif /* rtl flag checking */
1023 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1025 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1026 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1027 be decremented and possibly the label can be deleted. */
1028 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1030 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1031 goes through all the LABEL_REFs that jump to that label. The chain
1032 eventually winds up at the CODE_LABEL: it is circular. */
1033 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1035 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1036 be used on RHS. Use SET_REGNO to change the value. */
1037 #define REGNO(RTX) (rhs_regno(RTX))
1038 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1040 /* ORIGINAL_REGNO holds the number the register originally had; for a
1041 pseudo register turned into a hard reg this will hold the old pseudo
1043 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1045 /* Force the REGNO macro to only be used on the lhs. */
1046 static inline unsigned int
1047 rhs_regno (const_rtx x)
1049 return XCUINT (x, 0, REG);
1054 /* 1 if RTX is a reg or parallel that is the current function's return
1056 #define REG_FUNCTION_VALUE_P(RTX) \
1057 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1059 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1060 #define REG_USERVAR_P(RTX) \
1061 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1063 /* 1 if RTX is a reg that holds a pointer value. */
1064 #define REG_POINTER(RTX) \
1065 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1067 /* 1 if RTX is a mem that holds a pointer value. */
1068 #define MEM_POINTER(RTX) \
1069 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1071 /* 1 if the given register REG corresponds to a hard register. */
1072 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1074 /* 1 if the given register number REG_NO corresponds to a hard register. */
1075 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1077 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1078 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1079 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1081 /* For a CONST_DOUBLE:
1082 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1083 low-order word and ..._HIGH the high-order.
1084 For a float, there is a REAL_VALUE_TYPE structure, and
1085 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1086 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1087 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1088 #define CONST_DOUBLE_REAL_VALUE(r) \
1089 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1091 #define CONST_FIXED_VALUE(r) \
1092 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1093 #define CONST_FIXED_VALUE_HIGH(r) \
1094 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1095 #define CONST_FIXED_VALUE_LOW(r) \
1096 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1098 /* For a CONST_VECTOR, return element #n. */
1099 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1101 /* For a CONST_VECTOR, return the number of elements in a vector. */
1102 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1104 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1105 SUBREG_BYTE extracts the byte-number. */
1107 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1108 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1111 /* Return the right cost to give to an operation
1112 to make the cost of the corresponding register-to-register instruction
1113 N times that of a fast register-to-register instruction. */
1114 #define COSTS_N_INSNS(N) ((N) * 4)
1116 /* Maximum cost of an rtl expression. This value has the special meaning
1117 not to use an rtx with this cost under any circumstances. */
1118 #define MAX_COST INT_MAX
1120 extern void init_rtlanal (void);
1121 extern int rtx_cost (rtx, enum rtx_code, bool);
1122 extern int address_cost (rtx, enum machine_mode, bool);
1123 extern unsigned int subreg_lsb (const_rtx);
1124 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1126 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1127 unsigned int, enum machine_mode);
1128 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1129 unsigned int, enum machine_mode);
1130 extern unsigned int subreg_regno (const_rtx);
1131 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1132 unsigned int, enum machine_mode);
1133 extern unsigned int subreg_nregs (const_rtx);
1134 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1135 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1136 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1137 extern bool constant_pool_constant_p (rtx);
1138 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1139 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1142 /* 1 if RTX is a subreg containing a reg that is already known to be
1143 sign- or zero-extended from the mode of the subreg to the mode of
1144 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1147 When used as a LHS, is means that this extension must be done
1148 when assigning to SUBREG_REG. */
1150 #define SUBREG_PROMOTED_VAR_P(RTX) \
1151 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1153 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1155 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1157 _rtx->volatil = 1; \
1159 _rtx->volatil = 0; \
1160 _rtx->unchanging = (VAL); \
1164 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1165 this gives the necessary extensions:
1168 -1 - pointer unsigned, which most often can be handled like unsigned
1169 extension, except for generating instructions where we need to
1170 emit special code (ptr_extend insns) on some architectures. */
1172 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1173 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1174 ? -1 : (int) (RTX)->unchanging)
1176 /* Access various components of an ASM_OPERANDS rtx. */
1178 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1179 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1180 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1181 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1182 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1183 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1184 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1185 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1186 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1187 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1188 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1189 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1190 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1191 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1192 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1194 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1195 #define MEM_READONLY_P(RTX) \
1196 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1198 /* 1 if RTX is a mem and we should keep the alias set for this mem
1199 unchanged when we access a component. Set to 1, or example, when we
1200 are already in a non-addressable component of an aggregate. */
1201 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1202 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1204 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1205 #define MEM_VOLATILE_P(RTX) \
1206 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1207 ASM_INPUT)->volatil)
1209 /* 1 if RTX is a mem that refers to an aggregate, either to the
1210 aggregate itself or to a field of the aggregate. If zero, RTX may
1211 or may not be such a reference. */
1212 #define MEM_IN_STRUCT_P(RTX) \
1213 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1215 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1216 not refer to a scalar. */
1217 #define MEM_SCALAR_P(RTX) \
1218 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1220 /* 1 if RTX is a mem that cannot trap. */
1221 #define MEM_NOTRAP_P(RTX) \
1222 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1224 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1225 RTX. Otherwise, vice versa. Use this macro only when you are
1226 *sure* that you know that the MEM is in a structure, or is a
1227 scalar. VAL is evaluated only once. */
1228 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1232 MEM_IN_STRUCT_P (RTX) = 1; \
1233 MEM_SCALAR_P (RTX) = 0; \
1237 MEM_IN_STRUCT_P (RTX) = 0; \
1238 MEM_SCALAR_P (RTX) = 1; \
1242 /* The memory attribute block. We provide access macros for each value
1243 in the block and provide defaults if none specified. */
1244 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1246 /* The register attribute block. We provide access macros for each value
1247 in the block and provide defaults if none specified. */
1248 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1250 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1251 set, and may alias anything. Otherwise, the MEM can only alias
1252 MEMs in a conflicting alias set. This value is set in a
1253 language-dependent manner in the front-end, and should not be
1254 altered in the back-end. These set numbers are tested with
1255 alias_sets_conflict_p. */
1256 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1258 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1259 refer to part of a DECL. It may also be a COMPONENT_REF. */
1260 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1262 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1263 RTX that is always a CONST_INT. */
1264 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1266 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1267 is always a CONST_INT. */
1268 #define MEM_SIZE(RTX) \
1269 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1270 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1273 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1274 mode as a default when STRICT_ALIGNMENT, but not if not. */
1275 #define MEM_ALIGN(RTX) \
1276 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1277 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1278 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1280 /* For a REG rtx, the decl it is known to refer to, if it is known to
1281 refer to part of a DECL. */
1282 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1284 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1286 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1288 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1289 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1290 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1291 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1292 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1293 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1294 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1295 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1296 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1297 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1299 /* 1 if RTX is a label_ref for a nonlocal label. */
1300 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1301 REG_LABEL_TARGET note. */
1302 #define LABEL_REF_NONLOCAL_P(RTX) \
1303 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1305 /* 1 if RTX is a code_label that should always be considered to be needed. */
1306 #define LABEL_PRESERVE_P(RTX) \
1307 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1309 /* During sched, 1 if RTX is an insn that must be scheduled together
1310 with the preceding insn. */
1311 #define SCHED_GROUP_P(RTX) \
1312 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1313 JUMP_INSN, CALL_INSN \
1316 /* For a SET rtx, SET_DEST is the place that is set
1317 and SET_SRC is the value it is set to. */
1318 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1319 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1320 #define SET_IS_RETURN_P(RTX) \
1321 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1323 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1324 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1325 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1327 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1328 conditionally executing the code on, COND_EXEC_CODE is the code
1329 to execute if the condition is true. */
1330 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1331 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1333 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1335 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1336 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1338 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1339 tree constant pool. This information is private to varasm.c. */
1340 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1341 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1342 (RTX), SYMBOL_REF)->frame_related)
1344 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1345 #define SYMBOL_REF_FLAG(RTX) \
1346 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1348 /* 1 if RTX is a symbol_ref that has been the library function in
1349 emit_library_call. */
1350 #define SYMBOL_REF_USED(RTX) \
1351 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1353 /* 1 if RTX is a symbol_ref for a weak symbol. */
1354 #define SYMBOL_REF_WEAK(RTX) \
1355 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1357 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1358 SYMBOL_REF_CONSTANT. */
1359 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1361 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1363 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1364 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1366 /* The tree (decl or constant) associated with the symbol, or null. */
1367 #define SYMBOL_REF_DECL(RTX) \
1368 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1370 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1371 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1372 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1374 /* The rtx constant pool entry for a symbol, or null. */
1375 #define SYMBOL_REF_CONSTANT(RTX) \
1376 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1378 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1379 information derivable from the tree decl associated with this symbol.
1380 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1381 decl. In some cases this is a bug. But beyond that, it's nice to cache
1382 this information to avoid recomputing it. Finally, this allows space for
1383 the target to store more than one bit of information, as with
1385 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1387 /* These flags are common enough to be defined for all targets. They
1388 are computed by the default version of targetm.encode_section_info. */
1390 /* Set if this symbol is a function. */
1391 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1392 #define SYMBOL_REF_FUNCTION_P(RTX) \
1393 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1394 /* Set if targetm.binds_local_p is true. */
1395 #define SYMBOL_FLAG_LOCAL (1 << 1)
1396 #define SYMBOL_REF_LOCAL_P(RTX) \
1397 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1398 /* Set if targetm.in_small_data_p is true. */
1399 #define SYMBOL_FLAG_SMALL (1 << 2)
1400 #define SYMBOL_REF_SMALL_P(RTX) \
1401 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1402 /* The three-bit field at [5:3] is true for TLS variables; use
1403 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1404 #define SYMBOL_FLAG_TLS_SHIFT 3
1405 #define SYMBOL_REF_TLS_MODEL(RTX) \
1406 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1407 /* Set if this symbol is not defined in this translation unit. */
1408 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1409 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1410 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1411 /* Set if this symbol has a block_symbol structure associated with it. */
1412 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1413 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1414 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1415 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1416 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1417 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1418 #define SYMBOL_REF_ANCHOR_P(RTX) \
1419 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1421 /* Subsequent bits are available for the target to use. */
1422 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1423 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1425 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1426 structure to which the symbol belongs, or NULL if it has not been
1427 assigned a block. */
1428 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1430 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1431 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1432 RTX has not yet been assigned to a block, or it has not been given an
1433 offset within that block. */
1434 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1436 /* True if RTX is flagged to be a scheduling barrier. */
1437 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1438 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1440 /* Indicate whether the machine has any sort of auto increment addressing.
1441 If not, we can avoid checking for REG_INC notes. */
1443 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1444 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1445 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1446 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1447 #define AUTO_INC_DEC
1450 /* Define a macro to look for REG_INC notes,
1451 but save time on machines where they never exist. */
1454 #define FIND_REG_INC_NOTE(INSN, REG) \
1455 ((REG) != NULL_RTX && REG_P ((REG)) \
1456 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1457 : find_reg_note ((INSN), REG_INC, (REG)))
1459 #define FIND_REG_INC_NOTE(INSN, REG) 0
1462 #ifndef HAVE_PRE_INCREMENT
1463 #define HAVE_PRE_INCREMENT 0
1466 #ifndef HAVE_PRE_DECREMENT
1467 #define HAVE_PRE_DECREMENT 0
1470 #ifndef HAVE_POST_INCREMENT
1471 #define HAVE_POST_INCREMENT 0
1474 #ifndef HAVE_POST_DECREMENT
1475 #define HAVE_POST_DECREMENT 0
1478 #ifndef HAVE_POST_MODIFY_DISP
1479 #define HAVE_POST_MODIFY_DISP 0
1482 #ifndef HAVE_POST_MODIFY_REG
1483 #define HAVE_POST_MODIFY_REG 0
1486 #ifndef HAVE_PRE_MODIFY_DISP
1487 #define HAVE_PRE_MODIFY_DISP 0
1490 #ifndef HAVE_PRE_MODIFY_REG
1491 #define HAVE_PRE_MODIFY_REG 0
1495 /* Some architectures do not have complete pre/post increment/decrement
1496 instruction sets, or only move some modes efficiently. These macros
1497 allow us to tune autoincrement generation. */
1499 #ifndef USE_LOAD_POST_INCREMENT
1500 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1503 #ifndef USE_LOAD_POST_DECREMENT
1504 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1507 #ifndef USE_LOAD_PRE_INCREMENT
1508 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1511 #ifndef USE_LOAD_PRE_DECREMENT
1512 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1515 #ifndef USE_STORE_POST_INCREMENT
1516 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1519 #ifndef USE_STORE_POST_DECREMENT
1520 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1523 #ifndef USE_STORE_PRE_INCREMENT
1524 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1527 #ifndef USE_STORE_PRE_DECREMENT
1528 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1531 /* Nonzero when we are generating CONCATs. */
1532 extern int generating_concat_p;
1534 /* Nonzero when we are expanding trees to RTL. */
1535 extern int currently_expanding_to_rtl;
1537 /* Generally useful functions. */
1540 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1543 extern void set_stack_check_libfunc (rtx);
1544 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1545 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1548 extern rtx gen_blockage (void);
1549 extern rtvec gen_rtvec (int, ...);
1550 extern rtx copy_insn_1 (rtx);
1551 extern rtx copy_insn (rtx);
1552 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1553 extern rtx emit_copy_of_insn_after (rtx, rtx);
1554 extern void set_reg_attrs_from_value (rtx, rtx);
1555 extern void set_reg_attrs_for_parm (rtx, rtx);
1556 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1557 extern void adjust_reg_mode (rtx, enum machine_mode);
1558 extern int mem_expr_equal_p (const_tree, const_tree);
1561 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1562 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1564 extern rtvec rtvec_alloc (int);
1565 extern bool shared_const_p (const_rtx);
1566 extern rtx copy_rtx (rtx);
1567 extern void dump_rtx_statistics (void);
1570 extern rtx copy_rtx_if_shared (rtx);
1573 extern unsigned int rtx_size (const_rtx);
1574 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1575 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1576 extern int rtx_equal_p (const_rtx, const_rtx);
1579 extern rtvec gen_rtvec_v (int, rtx *);
1580 extern rtx gen_reg_rtx (enum machine_mode);
1581 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1582 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1583 extern rtx gen_reg_rtx_and_attrs (rtx);
1584 extern rtx gen_label_rtx (void);
1585 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1588 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1591 extern rtx gen_highpart (enum machine_mode, rtx);
1592 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1593 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1596 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1597 extern int subreg_lowpart_p (const_rtx);
1598 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1600 extern unsigned int subreg_highpart_offset (enum machine_mode,
1602 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1603 extern rtx make_safe_from (rtx, rtx);
1604 extern rtx convert_memory_address (enum machine_mode, rtx);
1605 extern rtx get_insns (void);
1606 extern const char *get_insn_name (int);
1607 extern rtx get_last_insn (void);
1608 extern rtx get_last_insn_anywhere (void);
1609 extern rtx get_first_nonnote_insn (void);
1610 extern rtx get_last_nonnote_insn (void);
1611 extern void start_sequence (void);
1612 extern void push_to_sequence (rtx);
1613 extern void push_to_sequence2 (rtx, rtx);
1614 extern void end_sequence (void);
1615 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1620 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1623 extern rtx force_const_mem (enum machine_mode, rtx);
1628 extern rtx get_pool_constant (rtx);
1629 extern rtx get_pool_constant_mark (rtx, bool *);
1630 extern enum machine_mode get_pool_mode (const_rtx);
1631 extern rtx simplify_subtraction (rtx);
1634 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1635 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1636 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1637 extern rtx assign_stack_temp_for_type (enum machine_mode,
1638 HOST_WIDE_INT, int, tree);
1639 extern rtx assign_temp (tree, int, int, int);
1642 extern rtx emit_insn_before (rtx, rtx);
1643 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1644 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1645 extern rtx emit_jump_insn_before (rtx, rtx);
1646 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1647 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1648 extern rtx emit_call_insn_before (rtx, rtx);
1649 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1650 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1651 extern rtx emit_debug_insn_before (rtx, rtx);
1652 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1653 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1654 extern rtx emit_barrier_before (rtx);
1655 extern rtx emit_label_before (rtx, rtx);
1656 extern rtx emit_note_before (enum insn_note, rtx);
1657 extern rtx emit_insn_after (rtx, rtx);
1658 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1659 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1660 extern rtx emit_jump_insn_after (rtx, rtx);
1661 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1662 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1663 extern rtx emit_call_insn_after (rtx, rtx);
1664 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1665 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1666 extern rtx emit_debug_insn_after (rtx, rtx);
1667 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1668 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1669 extern rtx emit_barrier_after (rtx);
1670 extern rtx emit_label_after (rtx, rtx);
1671 extern rtx emit_note_after (enum insn_note, rtx);
1672 extern rtx emit_insn (rtx);
1673 extern rtx emit_debug_insn (rtx);
1674 extern rtx emit_jump_insn (rtx);
1675 extern rtx emit_call_insn (rtx);
1676 extern rtx emit_label (rtx);
1677 extern rtx emit_barrier (void);
1678 extern rtx emit_note (enum insn_note);
1679 extern rtx emit_note_copy (rtx);
1680 extern rtx gen_clobber (rtx);
1681 extern rtx emit_clobber (rtx);
1682 extern rtx gen_use (rtx);
1683 extern rtx emit_use (rtx);
1684 extern rtx make_insn_raw (rtx);
1685 extern rtx make_debug_insn_raw (rtx);
1686 extern rtx make_jump_insn_raw (rtx);
1687 extern void add_function_usage_to (rtx, rtx);
1688 extern rtx last_call_insn (void);
1689 extern rtx previous_insn (rtx);
1690 extern rtx next_insn (rtx);
1691 extern rtx prev_nonnote_insn (rtx);
1692 extern rtx prev_nonnote_insn_bb (rtx);
1693 extern rtx next_nonnote_insn (rtx);
1694 extern rtx next_nonnote_insn_bb (rtx);
1695 extern rtx prev_nondebug_insn (rtx);
1696 extern rtx next_nondebug_insn (rtx);
1697 extern rtx prev_real_insn (rtx);
1698 extern rtx next_real_insn (rtx);
1699 extern rtx prev_active_insn (rtx);
1700 extern rtx next_active_insn (rtx);
1701 extern int active_insn_p (const_rtx);
1702 extern rtx prev_label (rtx);
1703 extern rtx next_label (rtx);
1704 extern rtx skip_consecutive_labels (rtx);
1705 extern rtx next_cc0_user (rtx);
1706 extern rtx prev_cc0_setter (rtx);
1708 /* In cfglayout.c */
1709 extern int insn_line (const_rtx);
1710 extern const char * insn_file (const_rtx);
1711 extern location_t locator_location (int);
1712 extern int locator_line (int);
1713 extern const char * locator_file (int);
1714 extern bool locator_eq (int, int);
1715 extern int prologue_locator, epilogue_locator;
1718 extern enum rtx_code reverse_condition (enum rtx_code);
1719 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1720 extern enum rtx_code swap_condition (enum rtx_code);
1721 extern enum rtx_code unsigned_condition (enum rtx_code);
1722 extern enum rtx_code signed_condition (enum rtx_code);
1723 extern void mark_jump_label (rtx, rtx, int);
1724 extern unsigned int cleanup_barriers (void);
1727 extern rtx delete_related_insns (rtx);
1730 extern rtx *find_constant_term_loc (rtx *);
1733 extern rtx try_split (rtx, rtx, int);
1734 extern int split_branch_probability;
1736 /* In unknown file */
1737 extern rtx split_insns (rtx, rtx);
1739 /* In simplify-rtx.c */
1740 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1741 rtx, enum machine_mode);
1742 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1744 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1746 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1748 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1749 enum machine_mode, rtx, rtx, rtx);
1750 extern rtx simplify_const_relational_operation (enum rtx_code,
1751 enum machine_mode, rtx, rtx);
1752 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1753 enum machine_mode, rtx, rtx);
1754 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1755 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1757 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1758 enum machine_mode, rtx, rtx, rtx);
1759 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1760 enum machine_mode, rtx, rtx);
1761 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1763 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1765 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1766 extern rtx simplify_rtx (const_rtx);
1767 extern rtx avoid_constant_pool_reference (rtx);
1768 extern rtx delegitimize_mem_from_attrs (rtx);
1769 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1772 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1776 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1777 extern void set_insn_deleted (rtx);
1779 /* Functions in rtlanal.c */
1781 /* Single set is implemented as macro for performance reasons. */
1782 #define single_set(I) (INSN_P (I) \
1783 ? (GET_CODE (PATTERN (I)) == SET \
1784 ? PATTERN (I) : single_set_1 (I)) \
1786 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1788 /* Structure used for passing data to REPLACE_LABEL. */
1789 typedef struct replace_label_data
1793 bool update_label_nuses;
1794 } replace_label_data;
1796 extern int rtx_addr_can_trap_p (const_rtx);
1797 extern bool nonzero_address_p (const_rtx);
1798 extern int rtx_unstable_p (const_rtx);
1799 extern bool rtx_varies_p (const_rtx, bool);
1800 extern bool rtx_addr_varies_p (const_rtx, bool);
1801 extern HOST_WIDE_INT get_integer_term (const_rtx);
1802 extern rtx get_related_value (const_rtx);
1803 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1804 extern void split_const (rtx, rtx *, rtx *);
1805 extern int reg_mentioned_p (const_rtx, const_rtx);
1806 extern int count_occurrences (const_rtx, const_rtx, int);
1807 extern int reg_referenced_p (const_rtx, const_rtx);
1808 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1809 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1810 extern int commutative_operand_precedence (rtx);
1811 extern bool swap_commutative_operands_p (rtx, rtx);
1812 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1813 extern int no_labels_between_p (const_rtx, const_rtx);
1814 extern int modified_in_p (const_rtx, const_rtx);
1815 extern int reg_set_p (const_rtx, const_rtx);
1816 extern rtx single_set_2 (const_rtx, const_rtx);
1817 extern int multiple_sets (const_rtx);
1818 extern int set_noop_p (const_rtx);
1819 extern int noop_move_p (const_rtx);
1820 extern rtx find_last_value (rtx, rtx *, rtx, int);
1821 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1822 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1823 extern const_rtx set_of (const_rtx, const_rtx);
1824 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1825 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1826 extern int dead_or_set_p (const_rtx, const_rtx);
1827 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1828 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1829 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1830 extern rtx find_reg_equal_equiv_note (const_rtx);
1831 extern rtx find_constant_src (const_rtx);
1832 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1833 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1834 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1835 extern void add_reg_note (rtx, enum reg_note, rtx);
1836 extern void remove_note (rtx, const_rtx);
1837 extern void remove_reg_equal_equiv_notes (rtx);
1838 extern int side_effects_p (const_rtx);
1839 extern int volatile_refs_p (const_rtx);
1840 extern int volatile_insn_p (const_rtx);
1841 extern int may_trap_p_1 (const_rtx, unsigned);
1842 extern int may_trap_p (const_rtx);
1843 extern int may_trap_or_fault_p (const_rtx);
1844 extern bool can_throw_internal (const_rtx);
1845 extern bool can_throw_external (const_rtx);
1846 extern bool insn_could_throw_p (const_rtx);
1847 extern bool insn_nothrow_p (const_rtx);
1848 extern bool can_nonlocal_goto (const_rtx);
1849 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1850 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1851 extern int inequality_comparisons_p (const_rtx);
1852 extern rtx replace_rtx (rtx, rtx, rtx);
1853 extern int replace_label (rtx *, void *);
1854 extern int rtx_referenced_p (rtx, rtx);
1855 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1856 extern int computed_jump_p (const_rtx);
1858 typedef int (*rtx_function) (rtx *, void *);
1859 extern int for_each_rtx (rtx *, rtx_function, void *);
1861 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1863 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1864 rtx_equal_p_callback_function);
1866 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1867 enum machine_mode *);
1868 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1869 bool, hash_rtx_callback_function);
1871 extern rtx regno_use_in (unsigned int, rtx);
1872 extern int auto_inc_p (const_rtx);
1873 extern int in_expr_list_p (const_rtx, const_rtx);
1874 extern void remove_node_from_expr_list (const_rtx, rtx *);
1875 extern int loc_mentioned_in_p (rtx *, const_rtx);
1876 extern rtx find_first_parameter_load (rtx, rtx);
1877 extern bool keep_with_call_p (const_rtx);
1878 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1879 extern int insn_rtx_cost (rtx, bool);
1881 /* Given an insn and condition, return a canonical description of
1882 the test being made. */
1883 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1885 /* Given a JUMP_INSN, return a canonical description of the test
1887 extern rtx get_condition (rtx, rtx *, int, int);
1889 /* Information about a subreg of a hard register. */
1892 /* Offset of first hard register involved in the subreg. */
1894 /* Number of hard registers involved in the subreg. */
1896 /* Whether this subreg can be represented as a hard reg with the new
1898 bool representable_p;
1901 extern void subreg_get_info (unsigned int, enum machine_mode,
1902 unsigned int, enum machine_mode,
1903 struct subreg_info *);
1907 extern void free_EXPR_LIST_list (rtx *);
1908 extern void free_INSN_LIST_list (rtx *);
1909 extern void free_EXPR_LIST_node (rtx);
1910 extern void free_INSN_LIST_node (rtx);
1911 extern rtx alloc_INSN_LIST (rtx, rtx);
1912 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1913 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1914 extern rtx remove_list_elem (rtx, rtx *);
1915 extern rtx remove_free_INSN_LIST_node (rtx *);
1916 extern rtx remove_free_EXPR_LIST_node (rtx *);
1921 /* Initialize may_move_cost and friends for mode M. */
1922 extern void init_move_cost (enum machine_mode);
1923 /* Resize reg info. */
1924 extern bool resize_reg_info (void);
1925 /* Free up register info memory. */
1926 extern void free_reg_info (void);
1929 extern int asm_noperands (const_rtx);
1930 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1931 enum machine_mode *, location_t *);
1933 extern enum reg_class reg_preferred_class (int);
1934 extern enum reg_class reg_alternate_class (int);
1935 extern enum reg_class reg_cover_class (int);
1936 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1939 extern void split_all_insns (void);
1940 extern unsigned int split_all_insns_noflow (void);
1942 #define MAX_SAVED_CONST_INT 64
1943 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1945 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1946 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1947 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1948 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1949 extern GTY(()) rtx const_true_rtx;
1951 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1953 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1954 same as VOIDmode. */
1956 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1958 /* Likewise, for the constants 1 and 2. */
1960 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1961 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1963 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1964 is used to represent the frame pointer. This is because the
1965 hard frame pointer and the automatic variables are separated by an amount
1966 that cannot be determined until after register allocation. We can assume
1967 that in this case ELIMINABLE_REGS will be defined, one action of which
1968 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1969 #ifndef HARD_FRAME_POINTER_REGNUM
1970 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1973 /* Index labels for global_rtl. */
1974 enum global_rtl_index
1980 /* For register elimination to work properly these hard_frame_pointer_rtx,
1981 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1982 the same register. */
1983 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1984 GR_ARG_POINTER = GR_FRAME_POINTER,
1986 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1987 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1989 GR_HARD_FRAME_POINTER,
1991 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1992 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1993 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1998 GR_VIRTUAL_INCOMING_ARGS,
1999 GR_VIRTUAL_STACK_ARGS,
2000 GR_VIRTUAL_STACK_DYNAMIC,
2001 GR_VIRTUAL_OUTGOING_ARGS,
2007 /* Pointers to standard pieces of rtx are stored here. */
2008 extern GTY(()) rtx global_rtl[GR_MAX];
2010 /* Standard pieces of rtx, to be substituted directly into things. */
2011 #define pc_rtx (global_rtl[GR_PC])
2012 #define cc0_rtx (global_rtl[GR_CC0])
2014 /* All references to certain hard regs, except those created
2015 by allocating pseudo regs into them (when that's possible),
2016 go through these unique rtx objects. */
2017 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2018 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2019 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2020 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2022 extern GTY(()) rtx pic_offset_table_rtx;
2023 extern GTY(()) rtx static_chain_rtx;
2024 extern GTY(()) rtx static_chain_incoming_rtx;
2025 extern GTY(()) rtx return_address_pointer_rtx;
2027 /* Include the RTL generation functions. */
2029 #ifndef GENERATOR_FILE
2031 #undef gen_rtx_ASM_INPUT
2032 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2033 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2034 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2035 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2038 /* There are some RTL codes that require special attention; the
2039 generation functions included above do the raw handling. If you
2040 add to this list, modify special_rtx in gengenrtl.c as well. */
2042 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2043 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2044 extern rtx gen_raw_REG (enum machine_mode, int);
2045 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2046 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2047 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2049 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2051 /* Virtual registers are used during RTL generation to refer to locations into
2052 the stack frame when the actual location isn't known until RTL generation
2053 is complete. The routine instantiate_virtual_regs replaces these with
2054 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2057 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2059 /* This points to the first word of the incoming arguments passed on the stack,
2060 either by the caller or by the callee when pretending it was passed by the
2063 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2065 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2067 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2068 variable on the stack. Otherwise, it points to the first variable on
2071 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2073 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2075 /* This points to the location of dynamically-allocated memory on the stack
2076 immediately after the stack pointer has been adjusted by the amount
2079 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2081 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2083 /* This points to the location in the stack at which outgoing arguments should
2084 be written when the stack is pre-pushed (arguments pushed using push
2085 insns always use sp). */
2087 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2089 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2091 /* This points to the Canonical Frame Address of the function. This
2092 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2093 but is calculated relative to the arg pointer for simplicity; the
2094 frame pointer nor stack pointer are necessarily fixed relative to
2095 the CFA until after reload. */
2097 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2099 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2101 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2103 /* Nonzero if REGNUM is a pointer into the stack frame. */
2104 #define REGNO_PTR_FRAME_P(REGNUM) \
2105 ((REGNUM) == STACK_POINTER_REGNUM \
2106 || (REGNUM) == FRAME_POINTER_REGNUM \
2107 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2108 || (REGNUM) == ARG_POINTER_REGNUM \
2109 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2110 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2112 /* REGNUM never really appearing in the INSN stream. */
2113 #define INVALID_REGNUM (~(unsigned int) 0)
2115 extern rtx output_constant_def (tree, int);
2116 extern rtx lookup_constant_def (tree);
2118 /* Nonzero after end of reload pass.
2119 Set to 1 or 0 by reload1.c. */
2121 extern int reload_completed;
2123 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2124 extern int epilogue_completed;
2126 /* Set to 1 while reload_as_needed is operating.
2127 Required by some machines to handle any generated moves differently. */
2129 extern int reload_in_progress;
2131 /* This macro indicates whether you may create a new
2134 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2137 /* Nonzero after end of regstack pass.
2138 Set to 1 or 0 by reg-stack.c. */
2139 extern int regstack_completed;
2142 /* If this is nonzero, we do not bother generating VOLATILE
2143 around volatile memory references, and we are willing to
2144 output indirect addresses. If cse is to follow, we reject
2145 indirect addresses so a useful potential cse is generated;
2146 if it is used only once, instruction combination will produce
2147 the same indirect address eventually. */
2148 extern int cse_not_expected;
2150 /* Translates rtx code to tree code, for those codes needed by
2151 REAL_ARITHMETIC. The function returns an int because the caller may not
2152 know what `enum tree_code' means. */
2154 extern int rtx_to_tree_code (enum rtx_code);
2157 extern int delete_trivially_dead_insns (rtx, int);
2158 extern int cse_main (rtx, int);
2159 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2160 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2163 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2164 extern int condjump_p (const_rtx);
2165 extern int any_condjump_p (const_rtx);
2166 extern int any_uncondjump_p (const_rtx);
2167 extern rtx pc_set (const_rtx);
2168 extern rtx condjump_label (const_rtx);
2169 extern int simplejump_p (const_rtx);
2170 extern int returnjump_p (rtx);
2171 extern int eh_returnjump_p (rtx);
2172 extern int onlyjump_p (const_rtx);
2173 extern int only_sets_cc0_p (const_rtx);
2174 extern int sets_cc0_p (const_rtx);
2175 extern int invert_jump_1 (rtx, rtx);
2176 extern int invert_jump (rtx, rtx, int);
2177 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2178 extern int true_regnum (const_rtx);
2179 extern unsigned int reg_or_subregno (const_rtx);
2180 extern int redirect_jump_1 (rtx, rtx);
2181 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2182 extern int redirect_jump (rtx, rtx, int);
2183 extern void rebuild_jump_labels (rtx);
2184 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2185 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2186 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2187 const_rtx, const_rtx);
2188 extern void delete_for_peephole (rtx, rtx);
2189 extern int condjump_in_parallel_p (const_rtx);
2191 /* In emit-rtl.c. */
2192 extern int max_reg_num (void);
2193 extern int max_label_num (void);
2194 extern int get_first_label_num (void);
2195 extern void maybe_set_first_label_num (rtx);
2196 extern void delete_insns_since (rtx);
2197 extern void mark_reg_pointer (rtx, int);
2198 extern void mark_user_reg (rtx);
2199 extern void reset_used_flags (rtx);
2200 extern void set_used_flags (rtx);
2201 extern void reorder_insns (rtx, rtx, rtx);
2202 extern void reorder_insns_nobb (rtx, rtx, rtx);
2203 extern int get_max_uid (void);
2204 extern int get_max_insn_count (void);
2205 extern int in_sequence_p (void);
2206 extern void force_next_line_note (void);
2207 extern void init_emit (void);
2208 extern void init_emit_regs (void);
2209 extern void init_emit_once (int);
2210 extern void push_topmost_sequence (void);
2211 extern void pop_topmost_sequence (void);
2212 extern void set_new_first_and_last_insn (rtx, rtx);
2213 extern unsigned int unshare_all_rtl (void);
2214 extern void unshare_all_rtl_again (rtx);
2215 extern void unshare_all_rtl_in_chain (rtx);
2216 extern void verify_rtl_sharing (void);
2217 extern void set_first_insn (rtx);
2218 extern void set_last_insn (rtx);
2219 extern void link_cc0_insns (rtx);
2220 extern void add_insn (rtx);
2221 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2222 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2223 extern void remove_insn (rtx);
2224 extern rtx emit (rtx);
2225 extern rtx delete_insn (rtx);
2226 extern rtx entry_of_function (void);
2227 extern void emit_insn_at_entry (rtx);
2228 extern void delete_insn_chain (rtx, rtx, bool);
2229 extern rtx unlink_insn_chain (rtx, rtx);
2230 extern rtx delete_insn_and_edges (rtx);
2231 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2232 extern rtx gen_const_mem (enum machine_mode, rtx);
2233 extern rtx gen_frame_mem (enum machine_mode, rtx);
2234 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2235 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2236 const_rtx, unsigned int);
2239 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2240 extern rtx remove_death (unsigned int, rtx);
2241 extern void dump_combine_stats (FILE *);
2242 extern void dump_combine_total_stats (FILE *);
2244 /* In cfgcleanup.c */
2245 extern void delete_dead_jumptables (void);
2247 /* In sched-vis.c. */
2248 extern void debug_bb_n_slim (int);
2249 extern void debug_bb_slim (struct basic_block_def *);
2250 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2251 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2252 extern void dump_insn_slim (FILE *f, rtx x);
2253 extern void debug_insn_slim (rtx x);
2255 /* In sched-rgn.c. */
2256 extern void schedule_insns (void);
2258 /* In sched-ebb.c. */
2259 extern void schedule_ebbs (void);
2261 /* In haifa-sched.c. */
2262 extern void fix_sched_param (const char *, const char *);
2264 /* In sel-sched-dump.c. */
2265 extern void sel_sched_fix_param (const char *param, const char *val);
2267 /* In print-rtl.c */
2268 extern const char *print_rtx_head;
2269 extern void debug_rtx (const_rtx);
2270 extern void debug_rtx_list (const_rtx, int);
2271 extern void debug_rtx_range (const_rtx, const_rtx);
2272 extern const_rtx debug_rtx_find (const_rtx, int);
2273 extern void print_mem_expr (FILE *, const_tree);
2274 extern void print_rtl (FILE *, const_rtx);
2275 extern void print_simple_rtl (FILE *, const_rtx);
2276 extern int print_rtl_single (FILE *, const_rtx);
2277 extern void print_inline_rtx (FILE *, const_rtx, int);
2280 extern void reposition_prologue_and_epilogue_notes (void);
2281 extern int prologue_epilogue_contains (const_rtx);
2282 extern int sibcall_epilogue_contains (const_rtx);
2283 extern void mark_temp_addr_taken (rtx);
2284 extern void update_temp_slot_address (rtx, rtx);
2285 extern void maybe_copy_epilogue_insn (rtx, rtx);
2288 extern void expand_null_return (void);
2289 extern void expand_naked_return (void);
2290 extern void emit_jump (rtx);
2293 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2297 extern void print_rtl_with_bb (FILE *, const_rtx);
2300 extern void dump_reg_info (FILE *);
2301 extern void dump_flow_info (FILE *, int);
2304 extern void init_expmed (void);
2305 extern void expand_inc (rtx, rtx);
2306 extern void expand_dec (rtx, rtx);
2309 extern bool can_copy_p (enum machine_mode);
2310 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2311 extern rtx fis_get_condition (rtx);
2315 extern HARD_REG_SET eliminable_regset;
2317 extern void mark_elimination (int, int);
2320 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2321 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2322 extern void globalize_reg (int);
2323 extern void init_reg_modes_target (void);
2324 extern void init_regs (void);
2325 extern void reinit_regs (void);
2326 extern void init_fake_stack_mems (void);
2327 extern void save_register_info (void);
2328 extern void init_reg_sets (void);
2329 extern void regclass (rtx, int);
2330 extern void reg_scan (rtx, unsigned int);
2331 extern void fix_register (const char *, int, int);
2332 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2336 extern void dbr_schedule (rtx);
2339 extern int function_invariant_p (const_rtx);
2349 LCT_RETURNS_TWICE = 5
2352 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2354 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2355 enum machine_mode, int, ...);
2358 extern void init_varasm_once (void);
2359 extern enum tls_model decl_default_tls_model (const_tree);
2362 extern void traverse_md_constants (int (*) (void **, void *), void *);
2363 struct md_constant { char *name, *value; };
2366 extern int read_skip_spaces (FILE *);
2367 extern bool read_rtx (FILE *, rtx *, int *);
2368 extern void copy_rtx_ptr_loc (const void *, const void *);
2369 extern void print_rtx_ptr_loc (const void *);
2370 extern const char *join_c_conditions (const char *, const char *);
2371 extern void print_c_condition (const char *);
2372 extern const char *read_rtx_filename;
2373 extern int read_rtx_lineno;
2376 extern rtx canon_rtx (rtx);
2377 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2378 extern rtx get_addr (rtx);
2379 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2380 rtx, bool (*)(const_rtx, bool));
2381 extern int read_dependence (const_rtx, const_rtx);
2382 extern int anti_dependence (const_rtx, const_rtx);
2383 extern int output_dependence (const_rtx, const_rtx);
2384 extern void init_alias_target (void);
2385 extern void init_alias_analysis (void);
2386 extern void end_alias_analysis (void);
2387 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2388 extern rtx find_base_term (rtx);
2389 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2390 extern rtx get_reg_known_value (unsigned int);
2391 extern bool get_reg_known_equiv_p (unsigned int);
2394 extern int stack_regs_mentioned (const_rtx insn);
2398 extern GTY(()) rtx stack_limit_rtx;
2401 extern void invert_br_probabilities (rtx);
2402 extern bool expensive_function_p (int);
2403 /* In cfgexpand.c */
2404 extern void add_reg_br_prob_note (rtx last, int probability);
2405 extern rtx wrap_constant (enum machine_mode, rtx);
2406 extern rtx unwrap_constant (rtx);
2408 /* In var-tracking.c */
2409 extern unsigned int variable_tracking_main (void);
2411 /* In stor-layout.c. */
2412 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2415 /* In loop-unswitch.c */
2416 extern rtx reversed_condition (rtx);
2417 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2420 extern rtx canon_condition (rtx);
2421 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2424 extern unsigned int compute_alignments (void);
2428 rtx (*gen_lowpart) (enum machine_mode, rtx);
2429 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2430 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2431 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2432 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2433 unsigned int, unsigned int *);
2434 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2436 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2439 /* Each pass can provide its own. */
2440 extern struct rtl_hooks rtl_hooks;
2442 /* ... but then it has to restore these. */
2443 extern const struct rtl_hooks general_rtl_hooks;
2445 /* Keep this for the nonce. */
2446 #define gen_lowpart rtl_hooks.gen_lowpart
2448 extern void insn_locators_alloc (void);
2449 extern void insn_locators_free (void);
2450 extern void insn_locators_finalize (void);
2451 extern void set_curr_insn_source_location (location_t);
2452 extern location_t get_curr_insn_source_location (void);
2453 extern void set_curr_insn_block (tree);
2454 extern tree get_curr_insn_block (void);
2455 extern int curr_insn_locator (void);
2456 extern bool optimize_insn_for_size_p (void);
2457 extern bool optimize_insn_for_speed_p (void);
2459 #endif /* ! GCC_RTL_H */
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