1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 #include "statistics.h"
31 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
32 #undef FLOAT /* Likewise. */
33 #undef ABS /* Likewise. */
34 #undef PC /* Likewise. */
36 /* Value used by some passes to "recognize" noop moves as valid
38 #define NOOP_MOVE_INSN_CODE INT_MAX
40 /* Register Transfer Language EXPRESSIONS CODES */
42 #define RTX_CODE enum rtx_code
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
46 #include "rtl.def" /* rtl expressions are documented here */
49 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
51 Assumes default enum value assignment. */
53 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
54 /* The cast here, saves many elsewhere. */
56 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59 /* We check bit 0-1 of some rtx class codes in the predicates below. */
61 /* Bit 0 = comparison if 0, arithmetic is 1
62 Bit 1 = 1 if commutative. */
68 /* Must follow the four preceding values. */
75 /* Bit 0 = 1 if constant. */
84 #define RTX_OBJ_MASK (~1)
85 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
86 #define RTX_COMPARE_MASK (~1)
87 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
88 #define RTX_ARITHMETIC_MASK (~1)
89 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
90 #define RTX_BINARY_MASK (~3)
91 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
92 #define RTX_COMMUTATIVE_MASK (~2)
93 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
94 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
95 #define RTX_EXPR_FIRST (RTX_COMPARE)
96 #define RTX_EXPR_LAST (RTX_UNARY)
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_size[NUM_RTX_CODE];
111 extern const unsigned char rtx_next[NUM_RTX_CODE];
113 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
114 relative to which the offsets are calculated, as explained in rtl.def. */
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align: 8;
120 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
121 unsigned min_after_vec: 1; /* minimum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned max_after_vec: 1; /* maximum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned min_after_base: 1; /* minimum address target label is
127 unsigned max_after_base: 1; /* maximum address target label is
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
133 } addr_diff_vec_flags;
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. If any element is nonzero, it means
138 the value of the corresponding attribute is unknown. */
139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
140 while EXPR can describe a larger underlying object, which might have a
141 stricter alignment; OFFSET is the offset of the MEM within that object. */
142 typedef struct mem_attrs GTY(())
144 HOST_WIDE_INT alias; /* Memory alias set. */
145 tree expr; /* expr corresponding to MEM. */
146 rtx offset; /* Offset from start of DECL, as CONST_INT. */
147 rtx size; /* Size in bytes, as a CONST_INT. */
148 unsigned int align; /* Alignment of MEM in bits. */
151 /* Structure used to describe the attributes of a REG in similar way as
152 mem_attrs does for MEM above. */
154 typedef struct reg_attrs GTY(())
156 tree decl; /* decl corresponding to REG. */
157 HOST_WIDE_INT offset; /* Offset from start of DECL. */
160 /* Common union for an element of an rtx. */
169 enum machine_mode rttype;
170 addr_diff_vec_flags rt_addr_diff_vec_flags;
171 struct cselib_val_struct *rt_cselib;
172 struct bitmap_head_def *rtbit;
174 struct basic_block_def *bb;
178 typedef union rtunion_def rtunion;
180 /* RTL expression ("rtx"). */
182 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
183 chain_prev ("RTX_PREV (&%h)")))
185 /* The kind of expression this is. */
186 ENUM_BITFIELD(rtx_code) code: 16;
188 /* The kind of value the expression has. */
189 ENUM_BITFIELD(machine_mode) mode : 8;
191 /* 1 in a MEM if we should keep the alias set for this mem unchanged
192 when we access a component.
193 1 in a CALL_INSN if it is a sibling call.
194 1 in a SET that is for a return.
195 In a CODE_LABEL, part of the two-bit alternate entry field. */
196 unsigned int jump : 1;
197 /* In a CODE_LABEL, part of the two-bit alternate entry field.
198 1 in a MEM if it cannot trap. */
199 unsigned int call : 1;
200 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
201 1 in a SUBREG if it references an unsigned object whose mode has been
202 from a promoted to a wider mode.
203 1 in a SYMBOL_REF if it addresses something in the per-function
205 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
206 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
207 unsigned int unchanging : 1;
208 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
209 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
210 if it has been deleted.
211 1 in a REG expression if corresponds to a variable declared by the user,
212 0 for an internally generated temporary.
213 1 in a SUBREG with a negative value.
214 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
215 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
216 unsigned int volatil : 1;
217 /* 1 in a MEM referring to a field of an aggregate.
218 0 if the MEM was a variable or the result of a * operator in C;
219 1 if it was the result of a . or -> operator (on a struct) in C.
220 1 in a REG if the register is used only in exit code a loop.
221 1 in a SUBREG expression if was generated from a variable with a
223 1 in a CODE_LABEL if the label is used for nonlocal gotos
224 and must not be deleted even if its count is zero.
225 1 in a LABEL_REF if this is a reference to a label outside the
227 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
228 together with the preceding insn. Valid only within sched.
229 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
230 from the target of a branch. Valid from reorg until end of compilation;
232 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
233 dead code. Valid only during dead-code elimination phase; cleared
235 unsigned int in_struct : 1;
236 /* At the end of RTL generation, 1 if this rtx is used. This is used for
237 copying shared structure. See `unshare_all_rtl'.
238 In a REG, this is not needed for that purpose, and used instead
239 in `leaf_renumber_regs_insn'.
240 1 in a SYMBOL_REF, means that emit_library_call
241 has used it as the function. */
242 unsigned int used : 1;
243 /* FIXME. This should be unused now that we do inlinining on trees,
244 but it is now being used for MEM_SCALAR_P. It should be renamed,
245 or some other field should be overloaded. */
246 unsigned integrated : 1;
247 /* 1 in an INSN or a SET if this rtx is related to the call frame,
248 either changing how we compute the frame address or saving and
249 restoring registers in the prologue and epilogue.
250 1 in a REG or MEM if it is a pointer.
251 1 in a SYMBOL_REF if it addresses something in the per-function
252 constant string pool. */
253 unsigned frame_related : 1;
254 /* 1 in a REG or PARALLEL that is the current function's return value.
255 1 in a SYMBOL_REF for a weak symbol. */
256 unsigned return_val : 1;
258 /* The first element of the operands of this rtx.
259 The number of operands and their types are controlled
260 by the `code' field, according to rtl.def. */
263 HOST_WIDE_INT hwint[1];
264 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
267 /* The size in bytes of an rtx header (code, mode and flags). */
268 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
270 /* The size in bytes of an rtx with code CODE. */
271 #define RTX_SIZE(CODE) rtx_size[CODE]
273 #define NULL_RTX (rtx) 0
275 /* The "next" and "previous" RTX, relative to this one. */
277 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
278 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
280 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
282 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
283 || GET_CODE (X) == CALL_INSN \
284 || GET_CODE (X) == JUMP_INSN \
285 || GET_CODE (X) == NOTE \
286 || GET_CODE (X) == BARRIER \
287 || GET_CODE (X) == CODE_LABEL) \
288 && PREV_INSN (X) != NULL \
289 && NEXT_INSN (PREV_INSN (X)) == X \
290 ? PREV_INSN (X) : NULL)
292 /* Define macros to access the `code' field of the rtx. */
294 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
295 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
297 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
298 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
300 /* RTL vector. These appear inside RTX's when there is a need
301 for a variable number of things. The principle use is inside
302 PARALLEL expressions. */
304 struct rtvec_def GTY(()) {
305 int num_elem; /* number of elements */
306 rtx GTY ((length ("%h.num_elem"))) elem[1];
309 #define NULL_RTVEC (rtvec) 0
311 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
312 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
314 /* Predicate yielding nonzero iff X is an rtx for a register. */
315 #define REG_P(X) (GET_CODE (X) == REG)
317 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
318 #define MEM_P(X) (GET_CODE (X) == MEM)
320 /* Predicate yielding nonzero iff X is a label insn. */
321 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
323 /* Predicate yielding nonzero iff X is a jump insn. */
324 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
326 /* Predicate yielding nonzero iff X is a call insn. */
327 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
329 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
330 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
332 /* Predicate yielding nonzero iff X is a real insn. */
334 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
336 /* Predicate yielding nonzero iff X is a note insn. */
337 #define NOTE_P(X) (GET_CODE (X) == NOTE)
339 /* Predicate yielding nonzero iff X is a barrier insn. */
340 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
342 /* Predicate yielding nonzero iff X is a data for a jump table. */
343 #define JUMP_TABLE_DATA_P(INSN) \
344 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
345 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
347 /* 1 if X is a unary operator. */
350 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
352 /* 1 if X is a binary operator. */
354 #define BINARY_P(X) \
355 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
357 /* 1 if X is an arithmetic operator. */
359 #define ARITHMETIC_P(X) \
360 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
361 == RTX_ARITHMETIC_RESULT)
363 /* 1 if X is an arithmetic operator. */
365 #define COMMUTATIVE_ARITH_P(X) \
366 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
368 /* 1 if X is a commutative arithmetic operator or a comparison operator.
369 These two are sometimes selected together because it is possible to
370 swap the two operands. */
372 #define SWAPPABLE_OPERANDS_P(X) \
373 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
374 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
375 | (1 << RTX_COMPARE)))
377 /* 1 if X is a non-commutative operator. */
379 #define NON_COMMUTATIVE_P(X) \
380 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
381 == RTX_NON_COMMUTATIVE_RESULT)
383 /* 1 if X is a commutative operator on integers. */
385 #define COMMUTATIVE_P(X) \
386 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
387 == RTX_COMMUTATIVE_RESULT)
389 /* 1 if X is a relational operator. */
391 #define COMPARISON_P(X) \
392 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
394 /* 1 if X is a constant value that is an integer. */
396 #define CONSTANT_P(X) \
397 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
398 || GET_CODE (X) == CONST_VECTOR)
400 /* 1 if X can be used to represent an object. */
401 #define OBJECT_P(X) \
402 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
404 /* General accessor macros for accessing the fields of an rtx. */
406 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
407 /* The bit with a star outside the statement expr and an & inside is
408 so that N can be evaluated only once. */
409 #define RTL_CHECK1(RTX, N, C1) __extension__ \
410 (*({ rtx const _rtx = (RTX); const int _n = (N); \
411 const enum rtx_code _code = GET_CODE (_rtx); \
412 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
413 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
415 if (GET_RTX_FORMAT(_code)[_n] != C1) \
416 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
418 &_rtx->u.fld[_n]; }))
420 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
421 (*({ rtx const _rtx = (RTX); const int _n = (N); \
422 const enum rtx_code _code = GET_CODE (_rtx); \
423 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
424 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
426 if (GET_RTX_FORMAT(_code)[_n] != C1 \
427 && GET_RTX_FORMAT(_code)[_n] != C2) \
428 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
430 &_rtx->u.fld[_n]; }))
432 #define RTL_CHECKC1(RTX, N, C) __extension__ \
433 (*({ rtx const _rtx = (RTX); const int _n = (N); \
434 if (GET_CODE (_rtx) != (C)) \
435 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
437 &_rtx->u.fld[_n]; }))
439 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
440 (*({ rtx const _rtx = (RTX); const int _n = (N); \
441 const enum rtx_code _code = GET_CODE (_rtx); \
442 if (_code != (C1) && _code != (C2)) \
443 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
445 &_rtx->u.fld[_n]; }))
447 #define RTVEC_ELT(RTVEC, I) __extension__ \
448 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
449 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
450 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
452 &_rtvec->elem[_i]; }))
454 #define XWINT(RTX, N) __extension__ \
455 (*({ rtx const _rtx = (RTX); const int _n = (N); \
456 const enum rtx_code _code = GET_CODE (_rtx); \
457 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
458 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
460 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
461 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
463 &_rtx->u.hwint[_n]; }))
465 #define XCWINT(RTX, N, C) __extension__ \
466 (*({ rtx const _rtx = (RTX); \
467 if (GET_CODE (_rtx) != (C)) \
468 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
470 &_rtx->u.hwint[N]; }))
472 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
475 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
478 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
481 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
484 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
485 const char *, int, const char *)
487 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
491 #else /* not ENABLE_RTL_CHECKING */
493 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
494 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
495 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
496 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
497 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
498 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
499 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
503 /* General accessor macros for accessing the flags of an rtx. */
505 /* Access an individual rtx flag, with no checking of any kind. */
506 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
508 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
509 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
510 ({ rtx const _rtx = (RTX); \
511 if (GET_CODE(_rtx) != C1) \
512 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
516 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
517 ({ rtx const _rtx = (RTX); \
518 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
519 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
523 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
524 ({ rtx const _rtx = (RTX); \
525 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
526 && GET_CODE(_rtx) != C3) \
527 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
531 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
532 ({ rtx const _rtx = (RTX); \
533 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
534 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
535 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
539 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
540 ({ rtx const _rtx = (RTX); \
541 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
542 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
543 && GET_CODE(_rtx) != C5) \
544 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
548 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
550 ({ rtx const _rtx = (RTX); \
551 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
552 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
553 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
554 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
558 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
560 ({ rtx const _rtx = (RTX); \
561 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
562 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
563 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
564 && GET_CODE(_rtx) != C7) \
565 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
569 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
571 ({ rtx const _rtx = (RTX); \
572 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
573 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
574 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
575 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
576 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
580 extern void rtl_check_failed_flag (const char *, rtx, const char *,
585 #else /* not ENABLE_RTL_FLAG_CHECKING */
587 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
588 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
589 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
590 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
591 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
592 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
593 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
594 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
597 #define CLEAR_RTX_FLAGS(RTX) \
599 rtx const _rtx = (RTX); \
601 _rtx->frame_related = 0; \
602 _rtx->in_struct = 0; \
604 _rtx->unchanging = 0; \
607 _rtx->unused_flag = 0; \
610 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
611 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
612 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
613 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
614 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
615 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
616 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
617 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
618 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
620 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
621 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
623 /* These are like XINT, etc. except that they expect a '0' field instead
624 of the normal type code. */
626 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
627 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
628 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
629 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
630 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
631 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
632 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
633 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
634 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
635 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
636 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
637 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
638 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
640 /* Access a '0' field with any type. */
641 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
643 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
644 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
645 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
646 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
647 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
648 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
649 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
650 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
651 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
652 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
653 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
655 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
656 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
658 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
660 /* ACCESS MACROS for particular fields of insns. */
662 /* Holds a unique number for each insn.
663 These are not necessarily sequentially increasing. */
664 #define INSN_UID(INSN) XINT (INSN, 0)
666 /* Chain insns together in sequence. */
667 #define PREV_INSN(INSN) XEXP (INSN, 1)
668 #define NEXT_INSN(INSN) XEXP (INSN, 2)
670 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
671 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
672 /* The body of an insn. */
673 #define PATTERN(INSN) XEXP (INSN, 5)
675 /* Code number of instruction, from when it was recognized.
676 -1 means this instruction has not been recognized yet. */
677 #define INSN_CODE(INSN) XINT (INSN, 6)
679 /* Set up in flow.c; empty before then.
680 Holds a chain of INSN_LIST rtx's whose first operands point at
681 previous insns with direct data-flow connections to this one.
682 That means that those insns set variables whose next use is in this insn.
683 They are always in the same basic block as this insn. */
684 #define LOG_LINKS(INSN) XEXP(INSN, 7)
686 #define RTX_UNCHANGING_P(RTX) \
687 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
688 #define RTX_FRAME_RELATED_P(RTX) \
689 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
690 JUMP_INSN, BARRIER, SET)->frame_related)
692 /* 1 if RTX is an insn that has been deleted. */
693 #define INSN_DELETED_P(RTX) \
694 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
695 CODE_LABEL, BARRIER, NOTE)->volatil)
697 /* 1 if RTX is a call to a const or pure function. */
698 #define CONST_OR_PURE_CALL_P(RTX) \
699 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
700 EXPR_LIST)->unchanging)
702 /* 1 if RTX is a call_insn for a sibling call. */
703 #define SIBLING_CALL_P(RTX) \
704 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
706 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
707 #define INSN_ANNULLED_BRANCH_P(RTX) \
708 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
710 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
711 elimination phase. */
712 #define INSN_DEAD_CODE_P(RTX) \
713 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
715 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
716 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
717 executed if the branch is taken. For annulled branches with this bit
718 clear, the insn should be executed only if the branch is not taken. */
719 #define INSN_FROM_TARGET_P(RTX) \
720 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
722 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
724 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
726 /* Holds a list of notes on what this insn does to various REGs.
727 It is a chain of EXPR_LIST rtx's, where the second operand is the
728 chain pointer and the first operand is the REG being described.
729 The mode field of the EXPR_LIST contains not a real machine mode
730 but a value from enum reg_note. */
732 #define REG_NOTES(INSN) XEXP(INSN, 8)
734 /* Don't forget to change reg_note_name in rtl.c. */
737 /* The value in REG dies in this insn (i.e., it is not needed past
738 this insn). If REG is set in this insn, the REG_DEAD note may,
739 but need not, be omitted. */
742 /* The REG is autoincremented or autodecremented. */
745 /* Describes the insn as a whole; it says that the insn sets a register
746 to a constant value or to be equivalent to a memory address. If the
747 register is spilled to the stack then the constant value should be
748 substituted for it. The contents of the REG_EQUIV is the constant
749 value or memory address, which may be different from the source of
750 the SET although it has the same value. A REG_EQUIV note may also
751 appear on an insn which copies a register parameter to a pseudo-register,
752 if there is a memory address which could be used to hold that
753 pseudo-register throughout the function. */
756 /* Like REG_EQUIV except that the destination is only momentarily equal
757 to the specified rtx. Therefore, it cannot be used for substitution;
758 but it can be used for cse. */
761 /* This insn copies the return-value of a library call out of the hard reg
762 for return values. This note is actually an INSN_LIST and it points to
763 the first insn involved in setting up arguments for the call. flow.c
764 uses this to delete the entire library call when its result is dead. */
767 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
768 and points at the one that has the REG_RETVAL. This note is also an
772 /* The register is always nonnegative during the containing loop. This is
773 used in branches so that decrement and branch instructions terminating
774 on zero can be matched. There must be an insn pattern in the md file
775 named `decrement_and_branch_until_zero' or else this will never be added
776 to any instructions. */
779 /* There is no conflict *after this insn* between the register in the note
780 and the destination of this insn. */
783 /* Identifies a register set in this insn and never used. */
786 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
787 respectively. Normally, these are required to be consecutive insns, but
788 we permit putting a cc0-setting insn in the delay slot of a branch as
789 long as only one copy of the insn exists. In that case, these notes
790 point from one to the other to allow code generation to determine what
791 any require information and to properly update CC_STATUS. These notes
793 REG_CC_SETTER, REG_CC_USER,
795 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
796 CODE_LABEL contained in the REG_LABEL note is used by the insn.
797 This note is an INSN_LIST. */
800 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
801 write-after-read and write-after-write dependencies respectively.
802 Data dependencies, which are the only type of LOG_LINK created by
803 flow, are represented by a 0 reg note kind. */
804 REG_DEP_ANTI, REG_DEP_OUTPUT,
806 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
807 It has an integer value. For jumps, it is the probability that this is a
808 taken branch. For calls, it is the probability that this call won't
812 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn
813 before that the code to profile the value is inserted. It contains
814 the results of profiling. */
817 /* Attached to a call insn; indicates that the call is malloc-like and
818 that the pointer returned cannot alias anything else. */
821 /* Used to optimize rtl generated by dynamic stack allocations for targets
822 where SETJMP_VIA_SAVE_AREA is true. */
825 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
826 CONCAT of two integer value. First specifies the branch predictor
827 that added the note, second specifies the predicted hitrate of branch
828 in the same format as REG_BR_PROB note uses. */
831 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
832 for DWARF to interpret what they imply. The attached rtx is used
833 instead of intuition. */
834 REG_FRAME_RELATED_EXPR,
836 /* Indicates that REG holds the exception context for the function.
837 This context is shared by inline functions, so the code to acquire
838 the real exception context is delayed until after inlining. */
841 /* Indicates what exception region an INSN belongs in. This is used to
842 indicate what region to which a call may throw. REGION 0 indicates
843 that a call cannot throw at all. REGION -1 indicates that it cannot
844 throw, nor will it execute a non-local goto. */
847 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
850 /* Indicates that this insn (which is part of the prologue) computes
851 a value which might not be used later, and if so it's OK to delete
852 the insn. Normally, deleting any insn in the prologue is an error.
853 At present the parameter is unused and set to (const_int 0). */
856 /* Indicates that a call does not return. */
859 /* Indicates that an indirect jump is a non-local goto instead of a
863 /* Indicates that a jump crosses between hot and cold sections
864 in a (partitioned) assembly or .o file, and therefore should not be
865 reduced to a simpler jump by optimizations. */
868 /* This kind of note is generated at each to `setjmp',
869 and similar functions that can return twice. */
872 /* Indicate calls that always returns. */
875 /* Indicate that the memory load references a vtable. The expression
876 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
880 /* The base value for branch probability notes. */
881 #define REG_BR_PROB_BASE 10000
883 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
884 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
885 #define PUT_REG_NOTE_KIND(LINK, KIND) \
886 PUT_MODE (LINK, (enum machine_mode) (KIND))
888 /* Names for REG_NOTE's in EXPR_LIST insn's. */
890 extern const char * const reg_note_name[];
891 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
893 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
894 USE and CLOBBER expressions.
895 USE expressions list the registers filled with arguments that
896 are passed to the function.
897 CLOBBER expressions document the registers explicitly clobbered
899 Pseudo registers can not be mentioned in this list. */
900 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
902 /* The label-number of a code-label. The assembler label
903 is made from `L' and the label-number printed in decimal.
904 Label numbers are unique in a compilation. */
905 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
907 #define LINE_NUMBER NOTE
909 /* In a NOTE that is a line number, this is a string for the file name that the
910 line is in. We use the same field to record block numbers temporarily in
911 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
912 between ints and pointers if we use a different macro for the block number.)
916 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
917 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
918 #ifdef USE_MAPPED_LOCATION
919 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
920 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
921 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
922 #define SET_INSN_DELETED(INSN) \
923 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
925 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
926 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
927 (XLOC).line = NOTE_LINE_NUMBER (INSN))
928 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
929 #define SET_INSN_DELETED(INSN) \
930 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
931 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
933 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
934 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
935 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
936 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
937 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
938 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
939 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
941 /* In a NOTE that is a line number, this is the line number.
942 Other kinds of NOTEs are identified by negative numbers here. */
943 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
945 /* Nonzero if INSN is a note marking the beginning of a basic block. */
946 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
947 (GET_CODE (INSN) == NOTE \
948 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
950 /* Algorithm and flags for prediction. */
951 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
952 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
953 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
955 /* Variable declaration and the location of a variable. */
956 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
958 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
961 /* Codes that appear in the NOTE_LINE_NUMBER field
962 for kinds of notes that are not line numbers.
964 Notice that we do not try to use zero here for any of
965 the special note codes because sometimes the source line
966 actually can be zero! This happens (for example) when we
967 are generating code for the per-translation-unit constructor
968 and destructor routines for some C++ translation unit.
970 If you should change any of the following values, or if you
971 should add a new value here, don't forget to change the
972 note_insn_name array in rtl.c. */
976 /* Keep all of these numbers negative. Adjust as needed. */
977 NOTE_INSN_BIAS = -100,
979 /* This note is used to get rid of an insn
980 when it isn't safe to patch the insn out of the chain. */
983 /* These are used to mark the beginning and end of a lexical block.
984 See NOTE_BLOCK and reorder_blocks. */
988 /* These mark the extremes of a loop. */
992 /* Generated at the place in a loop that `continue' jumps to. */
994 /* Generated at the start of a duplicated exit test. */
997 /* Generated at the end of a conditional at the top of the loop.
998 This is used to perform a lame form of loop rotation in lieu
999 of actually understanding the loop structure. The note is
1000 discarded after rotation is complete. */
1001 NOTE_INSN_LOOP_END_TOP_COND,
1003 /* This kind of note is generated at the end of the function body,
1004 just before the return insn or return label. In an optimizing
1005 compilation it is deleted by the first jump optimization, after
1006 enabling that optimizer to determine whether control can fall
1007 off the end of the function body without a return statement. */
1008 NOTE_INSN_FUNCTION_END,
1010 /* This marks the point immediately after the last prologue insn. */
1011 NOTE_INSN_PROLOGUE_END,
1013 /* This marks the point immediately prior to the first epilogue insn. */
1014 NOTE_INSN_EPILOGUE_BEG,
1016 /* Generated in place of user-declared labels when they are deleted. */
1017 NOTE_INSN_DELETED_LABEL,
1019 /* This note indicates the start of the real body of the function,
1020 i.e. the point just after all of the parms have been moved into
1021 their homes, etc. */
1022 NOTE_INSN_FUNCTION_BEG,
1024 /* These note where exception handling regions begin and end.
1025 Uses NOTE_EH_HANDLER to identify the region in question. */
1026 NOTE_INSN_EH_REGION_BEG,
1027 NOTE_INSN_EH_REGION_END,
1029 /* Generated whenever a duplicate line number note is output. For example,
1030 one is output after the end of an inline function, in order to prevent
1031 the line containing the inline call from being counted twice in gcov. */
1032 NOTE_INSN_REPEATED_LINE_NUMBER,
1034 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
1035 NOTE_INSN_BASIC_BLOCK,
1037 /* Record the expected value of a register at a location. Uses
1038 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
1039 NOTE_INSN_EXPECTED_VALUE,
1041 /* Record a prediction. Uses NOTE_PREDICTION. */
1042 NOTE_INSN_PREDICTION,
1044 /* Record that the current basic block is unlikely to be executed and
1045 should be moved to the UNLIKELY_EXECUTED_TEXT_SECTION. */
1046 NOTE_INSN_UNLIKELY_EXECUTED_CODE,
1048 /* The location of a variable. */
1049 NOTE_INSN_VAR_LOCATION,
1054 /* Names for NOTE insn's other than line numbers. */
1056 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
1057 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1058 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
1060 /* The name of a label, in case it corresponds to an explicit label
1061 in the input source code. */
1062 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1064 /* In jump.c, each label contains a count of the number
1065 of LABEL_REFs that point at it, so unused labels can be deleted. */
1066 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
1068 /* Labels carry a two-bit field composed of the ->jump and ->call
1069 bits. This field indicates whether the label is an alternate
1070 entry point, and if so, what kind. */
1073 LABEL_NORMAL = 0, /* ordinary label */
1074 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1075 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1076 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1079 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1081 /* Retrieve the kind of LABEL. */
1082 #define LABEL_KIND(LABEL) __extension__ \
1083 ({ rtx const _label = (LABEL); \
1084 if (GET_CODE (_label) != CODE_LABEL) \
1085 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1087 (enum label_kind) ((_label->jump << 1) | _label->call); })
1089 /* Set the kind of LABEL. */
1090 #define SET_LABEL_KIND(LABEL, KIND) do { \
1091 rtx _label = (LABEL); \
1092 unsigned int _kind = (KIND); \
1093 if (GET_CODE (_label) != CODE_LABEL) \
1094 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1096 _label->jump = ((_kind >> 1) & 1); \
1097 _label->call = (_kind & 1); \
1102 /* Retrieve the kind of LABEL. */
1103 #define LABEL_KIND(LABEL) \
1104 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1106 /* Set the kind of LABEL. */
1107 #define SET_LABEL_KIND(LABEL, KIND) do { \
1108 rtx _label = (LABEL); \
1109 unsigned int _kind = (KIND); \
1110 _label->jump = ((_kind >> 1) & 1); \
1111 _label->call = (_kind & 1); \
1114 #endif /* rtl flag checking */
1116 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1118 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1119 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1120 be decremented and possibly the label can be deleted. */
1121 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
1123 /* Once basic blocks are found in flow.c,
1124 each CODE_LABEL starts a chain that goes through
1125 all the LABEL_REFs that jump to that label.
1126 The chain eventually winds up at the CODE_LABEL: it is circular. */
1127 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1129 /* This is the field in the LABEL_REF through which the circular chain
1130 of references to a particular label is linked.
1131 This chain is set up in flow.c. */
1133 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
1135 /* Once basic blocks are found in flow.c,
1136 Each LABEL_REF points to its containing instruction with this field. */
1138 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
1140 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
1141 the number the register originally had; for a pseudo register turned into
1142 a hard reg this will hold the old pseudo register number. */
1144 #define REGNO(RTX) XCUINT (RTX, 0, REG)
1145 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1147 /* 1 if RTX is a reg or parallel that is the current function's return
1149 #define REG_FUNCTION_VALUE_P(RTX) \
1150 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1152 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1153 #define REG_USERVAR_P(RTX) \
1154 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1156 /* 1 if RTX is a reg that holds a pointer value. */
1157 #define REG_POINTER(RTX) \
1158 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1160 /* 1 if RTX is a mem that holds a pointer value. */
1161 #define MEM_POINTER(RTX) \
1162 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1164 /* 1 if the given register REG corresponds to a hard register. */
1165 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1167 /* 1 if the given register number REG_NO corresponds to a hard register. */
1168 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1170 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1172 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1174 /* For a CONST_DOUBLE:
1175 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1176 low-order word and ..._HIGH the high-order.
1177 For a float, there is a REAL_VALUE_TYPE structure, and
1178 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1179 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1180 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1181 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1183 /* For a CONST_VECTOR, return element #n. */
1184 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1186 /* For a CONST_VECTOR, return the number of elements in a vector. */
1187 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1189 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1190 SUBREG_BYTE extracts the byte-number. */
1192 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1193 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1196 /* Return the right cost to give to an operation
1197 to make the cost of the corresponding register-to-register instruction
1198 N times that of a fast register-to-register instruction. */
1199 #define COSTS_N_INSNS(N) ((N) * 4)
1201 /* Maximum cost of an rtl expression. This value has the special meaning
1202 not to use an rtx with this cost under any circumstances. */
1203 #define MAX_COST INT_MAX
1205 extern int rtx_cost (rtx, enum rtx_code);
1206 extern int address_cost (rtx, enum machine_mode);
1207 extern unsigned int subreg_lsb (rtx);
1208 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1210 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1211 unsigned int, enum machine_mode);
1212 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1213 unsigned int, enum machine_mode);
1214 extern unsigned int subreg_regno (rtx);
1215 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1216 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1219 /* 1 if RTX is a subreg containing a reg that is already known to be
1220 sign- or zero-extended from the mode of the subreg to the mode of
1221 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1224 When used as a LHS, is means that this extension must be done
1225 when assigning to SUBREG_REG. */
1227 #define SUBREG_PROMOTED_VAR_P(RTX) \
1228 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1230 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1232 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1234 _rtx->volatil = 1; \
1236 _rtx->volatil = 0; \
1237 _rtx->unchanging = (VAL); \
1240 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1241 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1242 ? -1 : (RTX)->unchanging)
1244 /* Access various components of an ASM_OPERANDS rtx. */
1246 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1247 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1248 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1249 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1250 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1251 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1252 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1253 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1254 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1255 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1256 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1257 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1258 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1259 #ifdef USE_MAPPED_LOCATION
1260 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1262 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1263 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1266 /* 1 if RTX is a mem and we should keep the alias set for this mem
1267 unchanged when we access a component. Set to 1, or example, when we
1268 are already in a non-addressable component of an aggregate. */
1269 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1270 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1272 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1273 #define MEM_VOLATILE_P(RTX) \
1274 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1275 ASM_INPUT)->volatil)
1277 /* 1 if RTX is a mem that refers to an aggregate, either to the
1278 aggregate itself of to a field of the aggregate. If zero, RTX may
1279 or may not be such a reference. */
1280 #define MEM_IN_STRUCT_P(RTX) \
1281 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1283 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may
1284 not refer to a scalar. */
1285 #define MEM_SCALAR_P(RTX) \
1286 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->integrated)
1288 /* 1 if RTX is a mem that cannot trap. */
1289 #define MEM_NOTRAP_P(RTX) \
1290 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1292 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1293 RTX. Otherwise, vice versa. Use this macro only when you are
1294 *sure* that you know that the MEM is in a structure, or is a
1295 scalar. VAL is evaluated only once. */
1296 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1300 MEM_IN_STRUCT_P (RTX) = 1; \
1301 MEM_SCALAR_P (RTX) = 0; \
1305 MEM_IN_STRUCT_P (RTX) = 0; \
1306 MEM_SCALAR_P (RTX) = 1; \
1310 /* The memory attribute block. We provide access macros for each value
1311 in the block and provide defaults if none specified. */
1312 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1314 /* The register attribute block. We provide access macros for each value
1315 in the block and provide defaults if none specified. */
1316 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1318 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1319 set, and may alias anything. Otherwise, the MEM can only alias
1320 MEMs in a conflicting alias set. This value is set in a
1321 language-dependent manner in the front-end, and should not be
1322 altered in the back-end. These set numbers are tested with
1323 alias_sets_conflict_p. */
1324 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1326 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1327 refer to part of a DECL. It may also be a COMPONENT_REF. */
1328 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1330 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1331 RTX that is always a CONST_INT. */
1332 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1334 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1335 is always a CONST_INT. */
1336 #define MEM_SIZE(RTX) \
1337 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1338 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1341 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1342 mode as a default when STRICT_ALIGNMENT, but not if not. */
1343 #define MEM_ALIGN(RTX) \
1344 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1345 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1346 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1348 /* For a REG rtx, the decl it is known to refer to, if it is known to
1349 refer to part of a DECL. */
1350 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1352 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1353 RTX that is always a CONST_INT. */
1354 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1356 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1357 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1358 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1359 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1360 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1361 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1362 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1363 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1364 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1366 /* 1 if RTX is a label_ref to a label outside the loop containing the
1368 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1369 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1371 /* 1 if RTX is a label_ref for a nonlocal label. */
1372 /* Likewise in an expr_list for a reg_label note. */
1373 #define LABEL_REF_NONLOCAL_P(RTX) \
1374 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1375 REG_LABEL)->volatil)
1377 /* 1 if RTX is a code_label that should always be considered to be needed. */
1378 #define LABEL_PRESERVE_P(RTX) \
1379 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1381 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1382 #define REG_LOOP_TEST_P(RTX) \
1383 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1385 /* During sched, 1 if RTX is an insn that must be scheduled together
1386 with the preceding insn. */
1387 #define SCHED_GROUP_P(RTX) \
1388 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1391 /* For a SET rtx, SET_DEST is the place that is set
1392 and SET_SRC is the value it is set to. */
1393 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1394 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1395 #define SET_IS_RETURN_P(RTX) \
1396 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1398 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1399 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1400 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1402 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1403 conditionally executing the code on, COND_EXEC_CODE is the code
1404 to execute if the condition is true. */
1405 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1406 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1408 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1410 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1411 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1413 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1414 tree constant pool. This information is private to varasm.c. */
1415 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1416 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1417 (RTX), SYMBOL_REF)->frame_related)
1419 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1420 #define SYMBOL_REF_FLAG(RTX) \
1421 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1423 /* 1 if RTX is a symbol_ref that has been the library function in
1424 emit_library_call. */
1425 #define SYMBOL_REF_USED(RTX) \
1426 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1428 /* 1 if RTX is a symbol_ref for a weak symbol. */
1429 #define SYMBOL_REF_WEAK(RTX) \
1430 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1432 /* The tree (decl or constant) associated with the symbol, or null. */
1433 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1435 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1436 information derivable from the tree decl associated with this symbol.
1437 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1438 decl. In some cases this is a bug. But beyond that, it's nice to cache
1439 this information to avoid recomputing it. Finally, this allows space for
1440 the target to store more than one bit of information, as with
1442 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1444 /* These flags are common enough to be defined for all targets. They
1445 are computed by the default version of targetm.encode_section_info. */
1447 /* Set if this symbol is a function. */
1448 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1449 #define SYMBOL_REF_FUNCTION_P(RTX) \
1450 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1451 /* Set if targetm.binds_local_p is true. */
1452 #define SYMBOL_FLAG_LOCAL (1 << 1)
1453 #define SYMBOL_REF_LOCAL_P(RTX) \
1454 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1455 /* Set if targetm.in_small_data_p is true. */
1456 #define SYMBOL_FLAG_SMALL (1 << 2)
1457 #define SYMBOL_REF_SMALL_P(RTX) \
1458 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1459 /* The three-bit field at [5:3] is true for TLS variables; use
1460 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1461 #define SYMBOL_FLAG_TLS_SHIFT 3
1462 #define SYMBOL_REF_TLS_MODEL(RTX) \
1463 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1464 /* Set if this symbol is not defined in this translation unit. */
1465 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1466 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1467 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1469 /* Subsequent bits are available for the target to use. */
1470 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1471 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1473 /* Define a macro to look for REG_INC notes,
1474 but save time on machines where they never exist. */
1476 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1477 #define FIND_REG_INC_NOTE(INSN, REG) \
1478 ((REG) != NULL_RTX && REG_P ((REG)) \
1479 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1480 : find_reg_note ((INSN), REG_INC, (REG)))
1482 #define FIND_REG_INC_NOTE(INSN, REG) 0
1485 /* Indicate whether the machine has any sort of auto increment addressing.
1486 If not, we can avoid checking for REG_INC notes. */
1488 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1489 #define AUTO_INC_DEC
1492 #ifndef HAVE_PRE_INCREMENT
1493 #define HAVE_PRE_INCREMENT 0
1496 #ifndef HAVE_PRE_DECREMENT
1497 #define HAVE_PRE_DECREMENT 0
1500 #ifndef HAVE_POST_INCREMENT
1501 #define HAVE_POST_INCREMENT 0
1504 #ifndef HAVE_POST_DECREMENT
1505 #define HAVE_POST_DECREMENT 0
1508 #ifndef HAVE_POST_MODIFY_DISP
1509 #define HAVE_POST_MODIFY_DISP 0
1512 #ifndef HAVE_POST_MODIFY_REG
1513 #define HAVE_POST_MODIFY_REG 0
1516 #ifndef HAVE_PRE_MODIFY_DISP
1517 #define HAVE_PRE_MODIFY_DISP 0
1520 #ifndef HAVE_PRE_MODIFY_REG
1521 #define HAVE_PRE_MODIFY_REG 0
1525 /* Some architectures do not have complete pre/post increment/decrement
1526 instruction sets, or only move some modes efficiently. These macros
1527 allow us to tune autoincrement generation. */
1529 #ifndef USE_LOAD_POST_INCREMENT
1530 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1533 #ifndef USE_LOAD_POST_DECREMENT
1534 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1537 #ifndef USE_LOAD_PRE_INCREMENT
1538 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1541 #ifndef USE_LOAD_PRE_DECREMENT
1542 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1545 #ifndef USE_STORE_POST_INCREMENT
1546 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1549 #ifndef USE_STORE_POST_DECREMENT
1550 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1553 #ifndef USE_STORE_PRE_INCREMENT
1554 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1557 #ifndef USE_STORE_PRE_DECREMENT
1558 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1561 /* Nonzero if we need to distinguish between the return value of this function
1562 and the return value of a function called by this function. This helps
1564 This is 1 until after the rtl generation pass.
1565 ??? It appears that this is 1 only when expanding trees to RTL. */
1566 extern int rtx_equal_function_value_matters;
1568 /* Nonzero when we are generating CONCATs. */
1569 extern int generating_concat_p;
1571 /* Generally useful functions. */
1574 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1576 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1579 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1580 extern void purge_builtin_constant_p (void);
1583 extern void set_stack_check_libfunc (rtx);
1584 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1585 extern rtx plus_constant_wide (rtx, HOST_WIDE_INT);
1586 extern rtx plus_constant_for_output_wide (rtx, HOST_WIDE_INT);
1587 extern void optimize_save_area_alloca (rtx);
1590 extern rtvec gen_rtvec (int, ...);
1591 extern rtx copy_insn_1 (rtx);
1592 extern rtx copy_insn (rtx);
1593 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1594 extern rtx emit_copy_of_insn_after (rtx, rtx);
1595 extern void set_reg_attrs_from_mem (rtx, rtx);
1596 extern void set_mem_attrs_from_reg (rtx, rtx);
1597 extern void set_reg_attrs_for_parm (rtx, rtx);
1598 extern void set_reg_pointer_align (rtx, unsigned int);
1599 extern int mem_expr_equal_p (tree, tree);
1602 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1603 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1605 extern rtvec rtvec_alloc (int);
1606 extern rtx copy_rtx (rtx);
1607 extern void dump_rtx_statistics (void);
1610 extern rtx copy_rtx_if_shared (rtx);
1613 extern rtx copy_most_rtx (rtx, rtx);
1614 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1615 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1616 extern int rtx_equal_p (rtx, rtx);
1619 extern rtvec gen_rtvec_v (int, rtx *);
1620 extern rtx gen_reg_rtx (enum machine_mode);
1621 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1622 extern rtx gen_label_rtx (void);
1623 extern int subreg_hard_regno (rtx, int);
1624 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1627 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1630 extern rtx gen_highpart (enum machine_mode, rtx);
1631 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1632 extern rtx gen_realpart (enum machine_mode, rtx);
1633 extern rtx gen_imagpart (enum machine_mode, rtx);
1634 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1637 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1638 extern int subreg_lowpart_p (rtx);
1639 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1641 extern unsigned int subreg_highpart_offset (enum machine_mode,
1643 extern rtx make_safe_from (rtx, rtx);
1644 extern rtx convert_memory_address (enum machine_mode, rtx);
1645 extern rtx get_insns (void);
1646 extern const char *get_insn_name (int);
1647 extern rtx get_last_insn (void);
1648 extern rtx get_last_insn_anywhere (void);
1649 extern rtx get_first_nonnote_insn (void);
1650 extern rtx get_last_nonnote_insn (void);
1651 extern void start_sequence (void);
1652 extern void push_to_sequence (rtx);
1653 extern void end_sequence (void);
1654 extern void push_to_full_sequence (rtx, rtx);
1655 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1659 extern rtx force_const_mem (enum machine_mode, rtx);
1662 extern rtx get_pool_constant (rtx);
1663 extern rtx get_pool_constant_mark (rtx, bool *);
1664 extern enum machine_mode get_pool_mode (rtx);
1665 extern rtx get_pool_constant_for_function (struct function *, rtx);
1666 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1667 extern int get_pool_offset (rtx);
1668 extern rtx simplify_subtraction (rtx);
1671 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1672 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1673 extern rtx assign_stack_temp_for_type (enum machine_mode,
1674 HOST_WIDE_INT, int, tree);
1675 extern rtx assign_temp (tree, int, int, int);
1678 extern rtx emit_insn_before (rtx, rtx);
1679 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1680 extern rtx emit_jump_insn_before (rtx, rtx);
1681 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1682 extern rtx emit_call_insn_before (rtx, rtx);
1683 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1684 extern rtx emit_barrier_before (rtx);
1685 extern rtx emit_label_before (rtx, rtx);
1686 extern rtx emit_note_before (int, rtx);
1687 extern rtx emit_insn_after (rtx, rtx);
1688 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1689 extern rtx emit_jump_insn_after (rtx, rtx);
1690 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1691 extern rtx emit_call_insn_after (rtx, rtx);
1692 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1693 extern rtx emit_barrier_after (rtx);
1694 extern rtx emit_label_after (rtx, rtx);
1695 extern rtx emit_note_after (int, rtx);
1696 extern rtx emit_note_copy_after (rtx, rtx);
1697 extern rtx emit_insn (rtx);
1698 extern rtx emit_jump_insn (rtx);
1699 extern rtx emit_call_insn (rtx);
1700 extern rtx emit_label (rtx);
1701 extern rtx emit_barrier (void);
1702 extern rtx emit_note (int);
1703 extern rtx emit_note_copy (rtx);
1704 extern rtx emit_line_note (location_t);
1705 extern rtx make_insn_raw (rtx);
1706 extern void add_function_usage_to (rtx, rtx);
1707 extern rtx last_call_insn (void);
1708 extern rtx previous_insn (rtx);
1709 extern rtx next_insn (rtx);
1710 extern rtx prev_nonnote_insn (rtx);
1711 extern rtx next_nonnote_insn (rtx);
1712 extern rtx prev_real_insn (rtx);
1713 extern rtx next_real_insn (rtx);
1714 extern rtx prev_active_insn (rtx);
1715 extern rtx next_active_insn (rtx);
1716 extern int active_insn_p (rtx);
1717 extern rtx prev_label (rtx);
1718 extern rtx next_label (rtx);
1719 extern rtx skip_consecutive_labels (rtx);
1720 extern rtx next_cc0_user (rtx);
1721 extern rtx prev_cc0_setter (rtx);
1723 #define emit_insn_before_sameloc(INSN, BEFORE) \
1724 emit_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1725 #define emit_jump_insn_before_sameloc(INSN, BEFORE) \
1726 emit_jump_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1727 #define emit_call_insn_before_sameloc(INSN, BEFORE) \
1728 emit_call_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1729 #define emit_insn_after_sameloc(INSN, AFTER) \
1730 emit_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1731 #define emit_jump_insn_after_sameloc(INSN, AFTER) \
1732 emit_jump_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1733 #define emit_call_insn_after_sameloc(INSN, AFTER) \
1734 emit_call_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1736 /* In cfglayout.c */
1737 extern tree choose_inner_scope (tree, tree);
1738 extern int insn_line (rtx);
1739 extern const char * insn_file (rtx);
1740 extern int locator_line (int);
1741 extern const char * locator_file (int);
1742 extern int prologue_locator, epilogue_locator;
1745 extern enum rtx_code reverse_condition (enum rtx_code);
1746 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1747 extern enum rtx_code swap_condition (enum rtx_code);
1748 extern enum rtx_code unsigned_condition (enum rtx_code);
1749 extern enum rtx_code signed_condition (enum rtx_code);
1750 extern void mark_jump_label (rtx, rtx, int);
1751 extern void cleanup_barriers (void);
1754 extern bool squeeze_notes (rtx *, rtx *);
1755 extern rtx delete_related_insns (rtx);
1756 extern void delete_jump (rtx);
1757 extern void delete_barrier (rtx);
1758 extern rtx get_label_before (rtx);
1759 extern rtx get_label_after (rtx);
1760 extern rtx follow_jumps (rtx);
1763 extern rtx *find_constant_term_loc (rtx *);
1766 extern rtx try_split (rtx, rtx, int);
1767 extern int split_branch_probability;
1769 /* In unknown file */
1770 extern rtx split_insns (rtx, rtx);
1772 /* In simplify-rtx.c */
1773 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1775 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1777 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1778 enum machine_mode, rtx, rtx, rtx);
1779 extern rtx simplify_const_relational_operation (enum rtx_code,
1780 enum machine_mode, rtx, rtx);
1781 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1782 enum machine_mode, rtx, rtx);
1783 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1784 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1786 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1787 enum machine_mode, rtx, rtx, rtx);
1788 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1789 enum machine_mode, rtx, rtx);
1790 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1792 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1794 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1795 extern rtx simplify_rtx (rtx);
1796 extern rtx avoid_constant_pool_reference (rtx);
1799 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1803 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1805 /* Functions in rtlanal.c */
1807 /* Single set is implemented as macro for performance reasons. */
1808 #define single_set(I) (INSN_P (I) \
1809 ? (GET_CODE (PATTERN (I)) == SET \
1810 ? PATTERN (I) : single_set_1 (I)) \
1812 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1814 /* Structure used for passing data to REPLACE_LABEL. */
1815 typedef struct replace_label_data
1819 bool update_label_nuses;
1820 } replace_label_data;
1822 extern int rtx_addr_can_trap_p (rtx);
1823 extern bool nonzero_address_p (rtx);
1824 extern int rtx_unstable_p (rtx);
1825 extern int rtx_varies_p (rtx, int);
1826 extern int rtx_addr_varies_p (rtx, int);
1827 extern HOST_WIDE_INT get_integer_term (rtx);
1828 extern rtx get_related_value (rtx);
1829 extern rtx get_jump_table_offset (rtx, rtx *);
1830 extern int global_reg_mentioned_p (rtx);
1831 extern int reg_mentioned_p (rtx, rtx);
1832 extern int count_occurrences (rtx, rtx, int);
1833 extern int reg_referenced_p (rtx, rtx);
1834 extern int reg_used_between_p (rtx, rtx, rtx);
1835 extern int reg_referenced_between_p (rtx, rtx, rtx);
1836 extern int reg_set_between_p (rtx, rtx, rtx);
1837 extern int regs_set_between_p (rtx, rtx, rtx);
1838 extern int commutative_operand_precedence (rtx);
1839 extern int swap_commutative_operands_p (rtx, rtx);
1840 extern int modified_between_p (rtx, rtx, rtx);
1841 extern int no_labels_between_p (rtx, rtx);
1842 extern int no_jumps_between_p (rtx, rtx);
1843 extern int modified_in_p (rtx, rtx);
1844 extern int insn_dependent_p (rtx, rtx);
1845 extern int reg_set_p (rtx, rtx);
1846 extern rtx single_set_2 (rtx, rtx);
1847 extern int multiple_sets (rtx);
1848 extern int set_noop_p (rtx);
1849 extern int noop_move_p (rtx);
1850 extern rtx find_last_value (rtx, rtx *, rtx, int);
1851 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1852 extern int reg_overlap_mentioned_p (rtx, rtx);
1853 extern rtx set_of (rtx, rtx);
1854 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1855 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1856 extern int dead_or_set_p (rtx, rtx);
1857 extern int dead_or_set_regno_p (rtx, unsigned int);
1858 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1859 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1860 extern rtx find_reg_equal_equiv_note (rtx);
1861 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1862 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1863 extern int pure_call_p (rtx);
1864 extern void remove_note (rtx, rtx);
1865 extern int side_effects_p (rtx);
1866 extern int volatile_refs_p (rtx);
1867 extern int volatile_insn_p (rtx);
1868 extern int may_trap_p (rtx);
1869 extern int inequality_comparisons_p (rtx);
1870 extern rtx replace_rtx (rtx, rtx, rtx);
1871 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1872 extern int replace_label (rtx *, void *);
1873 extern int rtx_referenced_p (rtx, rtx);
1874 extern bool tablejump_p (rtx, rtx *, rtx *);
1875 extern int computed_jump_p (rtx);
1876 typedef int (*rtx_function) (rtx *, void *);
1877 extern int for_each_rtx (rtx *, rtx_function, void *);
1878 extern rtx regno_use_in (unsigned int, rtx);
1879 extern int auto_inc_p (rtx);
1880 extern int in_expr_list_p (rtx, rtx);
1881 extern void remove_node_from_expr_list (rtx, rtx *);
1882 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1883 extern int loc_mentioned_in_p (rtx *, rtx);
1884 extern rtx find_first_parameter_load (rtx, rtx);
1885 extern bool keep_with_call_p (rtx);
1886 extern bool label_is_jump_target_p (rtx, rtx);
1890 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1894 void free_EXPR_LIST_list (rtx *);
1895 void free_INSN_LIST_list (rtx *);
1896 void free_EXPR_LIST_node (rtx);
1897 void free_INSN_LIST_node (rtx);
1898 rtx alloc_INSN_LIST (rtx, rtx);
1899 rtx alloc_EXPR_LIST (int, rtx, rtx);
1903 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1904 Always at least 3, since the combiner could put that many together
1905 and we want this to remain correct for all the remaining passes. */
1907 extern int max_parallel;
1909 /* Free up register info memory. */
1910 extern void free_reg_info (void);
1913 extern int asm_noperands (rtx);
1914 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1915 enum machine_mode *);
1917 extern enum reg_class reg_preferred_class (int);
1918 extern enum reg_class reg_alternate_class (int);
1920 extern void split_all_insns (int);
1921 extern void split_all_insns_noflow (void);
1923 #define MAX_SAVED_CONST_INT 64
1924 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1926 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1927 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1928 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1929 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1930 extern GTY(()) rtx const_true_rtx;
1932 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1934 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1935 same as VOIDmode. */
1937 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1939 /* Likewise, for the constants 1 and 2. */
1941 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1942 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1944 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1945 is used to represent the frame pointer. This is because the
1946 hard frame pointer and the automatic variables are separated by an amount
1947 that cannot be determined until after register allocation. We can assume
1948 that in this case ELIMINABLE_REGS will be defined, one action of which
1949 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1950 #ifndef HARD_FRAME_POINTER_REGNUM
1951 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1954 /* Index labels for global_rtl. */
1955 enum global_rtl_index
1961 /* For register elimination to work properly these hard_frame_pointer_rtx,
1962 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1963 the same register. */
1964 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1965 GR_ARG_POINTER = GR_FRAME_POINTER,
1967 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1968 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1970 GR_HARD_FRAME_POINTER,
1972 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1973 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1974 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1979 GR_VIRTUAL_INCOMING_ARGS,
1980 GR_VIRTUAL_STACK_ARGS,
1981 GR_VIRTUAL_STACK_DYNAMIC,
1982 GR_VIRTUAL_OUTGOING_ARGS,
1988 /* Pointers to standard pieces of rtx are stored here. */
1989 extern GTY(()) rtx global_rtl[GR_MAX];
1991 /* Standard pieces of rtx, to be substituted directly into things. */
1992 #define pc_rtx (global_rtl[GR_PC])
1993 #define cc0_rtx (global_rtl[GR_CC0])
1995 /* All references to certain hard regs, except those created
1996 by allocating pseudo regs into them (when that's possible),
1997 go through these unique rtx objects. */
1998 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1999 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2000 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2001 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2003 extern GTY(()) rtx pic_offset_table_rtx;
2004 extern GTY(()) rtx static_chain_rtx;
2005 extern GTY(()) rtx static_chain_incoming_rtx;
2006 extern GTY(()) rtx return_address_pointer_rtx;
2008 /* Include the RTL generation functions. */
2012 #ifndef USE_MAPPED_LOCATION
2013 #undef gen_rtx_ASM_OPERANDS
2014 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
2015 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
2019 /* There are some RTL codes that require special attention; the
2020 generation functions included above do the raw handling. If you
2021 add to this list, modify special_rtx in gengenrtl.c as well. */
2023 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2024 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2025 extern rtx gen_raw_REG (enum machine_mode, int);
2026 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2027 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2028 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2030 /* We need the cast here to ensure that we get the same result both with
2031 and without prototypes. */
2032 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
2034 /* Virtual registers are used during RTL generation to refer to locations into
2035 the stack frame when the actual location isn't known until RTL generation
2036 is complete. The routine instantiate_virtual_regs replaces these with
2037 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2040 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2042 /* This points to the first word of the incoming arguments passed on the stack,
2043 either by the caller or by the callee when pretending it was passed by the
2046 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2048 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2050 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2051 variable on the stack. Otherwise, it points to the first variable on
2054 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2056 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2058 /* This points to the location of dynamically-allocated memory on the stack
2059 immediately after the stack pointer has been adjusted by the amount
2062 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2064 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2066 /* This points to the location in the stack at which outgoing arguments should
2067 be written when the stack is pre-pushed (arguments pushed using push
2068 insns always use sp). */
2070 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2072 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2074 /* This points to the Canonical Frame Address of the function. This
2075 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2076 but is calculated relative to the arg pointer for simplicity; the
2077 frame pointer nor stack pointer are necessarily fixed relative to
2078 the CFA until after reload. */
2080 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2082 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2084 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2086 /* Nonzero if REGNUM is a pointer into the stack frame. */
2087 #define REGNO_PTR_FRAME_P(REGNUM) \
2088 ((REGNUM) == STACK_POINTER_REGNUM \
2089 || (REGNUM) == FRAME_POINTER_REGNUM \
2090 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2091 || (REGNUM) == ARG_POINTER_REGNUM \
2092 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2093 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2095 /* REGNUM never really appearing in the INSN stream. */
2096 #define INVALID_REGNUM (~(unsigned int) 0)
2098 extern rtx output_constant_def (tree, int);
2099 extern rtx lookup_constant_def (tree);
2101 /* Nonzero after the second flow pass has completed.
2102 Set to 1 or 0 by toplev.c */
2103 extern int flow2_completed;
2105 /* Nonzero after end of reload pass.
2106 Set to 1 or 0 by reload1.c. */
2108 extern int reload_completed;
2110 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2111 extern int epilogue_completed;
2113 /* Set to 1 while reload_as_needed is operating.
2114 Required by some machines to handle any generated moves differently. */
2116 extern int reload_in_progress;
2118 /* If this is nonzero, we do not bother generating VOLATILE
2119 around volatile memory references, and we are willing to
2120 output indirect addresses. If cse is to follow, we reject
2121 indirect addresses so a useful potential cse is generated;
2122 if it is used only once, instruction combination will produce
2123 the same indirect address eventually. */
2124 extern int cse_not_expected;
2126 /* Set to nonzero before life analysis to indicate that it is unsafe to
2127 generate any new pseudo registers. */
2128 extern int no_new_pseudos;
2130 /* Translates rtx code to tree code, for those codes needed by
2131 REAL_ARITHMETIC. The function returns an int because the caller may not
2132 know what `enum tree_code' means. */
2134 extern int rtx_to_tree_code (enum rtx_code);
2137 extern int delete_trivially_dead_insns (rtx, int);
2139 extern int cse_main (rtx, int, int, FILE *);
2141 extern void cse_condition_code_reg (void);
2144 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2145 extern int condjump_p (rtx);
2146 extern int any_condjump_p (rtx);
2147 extern int any_uncondjump_p (rtx);
2148 extern int safe_to_remove_jump_p (rtx);
2149 extern rtx pc_set (rtx);
2150 extern rtx condjump_label (rtx);
2151 extern int simplejump_p (rtx);
2152 extern int returnjump_p (rtx);
2153 extern int onlyjump_p (rtx);
2154 extern int only_sets_cc0_p (rtx);
2155 extern int sets_cc0_p (rtx);
2156 extern int invert_jump_1 (rtx, rtx);
2157 extern int invert_jump (rtx, rtx, int);
2158 extern int rtx_renumbered_equal_p (rtx, rtx);
2159 extern int true_regnum (rtx);
2160 extern unsigned int reg_or_subregno (rtx);
2161 extern int redirect_jump_1 (rtx, rtx);
2162 extern int redirect_jump (rtx, rtx, int);
2163 extern void rebuild_jump_labels (rtx);
2164 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2165 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2167 extern void delete_for_peephole (rtx, rtx);
2168 extern int condjump_in_parallel_p (rtx);
2169 extern void purge_line_number_notes (rtx);
2171 /* In emit-rtl.c. */
2172 extern int max_reg_num (void);
2173 extern int max_label_num (void);
2174 extern int get_first_label_num (void);
2175 extern void maybe_set_first_label_num (rtx);
2176 extern void delete_insns_since (rtx);
2177 extern void mark_reg_pointer (rtx, int);
2178 extern void mark_user_reg (rtx);
2179 extern void reset_used_flags (rtx);
2180 extern void set_used_flags (rtx);
2181 extern void reorder_insns (rtx, rtx, rtx);
2182 extern void reorder_insns_nobb (rtx, rtx, rtx);
2183 extern int get_max_uid (void);
2184 extern int in_sequence_p (void);
2185 extern void force_next_line_note (void);
2186 extern void init_emit (void);
2187 extern void init_emit_once (int);
2188 extern void push_topmost_sequence (void);
2189 extern void pop_topmost_sequence (void);
2190 extern void reverse_comparison (rtx);
2191 extern void set_new_first_and_last_insn (rtx, rtx);
2192 extern void set_new_last_label_num (int);
2193 extern void unshare_all_rtl (void);
2194 extern void unshare_all_rtl_again (rtx);
2195 extern void unshare_all_rtl_in_chain (rtx);
2196 extern void verify_rtl_sharing (void);
2197 extern void set_first_insn (rtx);
2198 extern void set_last_insn (rtx);
2199 extern void link_cc0_insns (rtx);
2200 extern void add_insn (rtx);
2201 extern void add_insn_before (rtx, rtx);
2202 extern void add_insn_after (rtx, rtx);
2203 extern void remove_insn (rtx);
2204 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
2205 extern enum rtx_code classify_insn (rtx);
2206 extern rtx emit (rtx);
2207 /* Query and clear/ restore no_line_numbers. This is used by the
2208 switch / case handling in stmt.c to give proper line numbers in
2209 warnings about unreachable code. */
2210 int force_line_numbers (void);
2211 void restore_line_number_status (int old_value);
2212 extern void renumber_insns (FILE *);
2213 extern void remove_unnecessary_notes (void);
2214 extern rtx delete_insn (rtx);
2215 extern rtx entry_of_function (void);
2216 extern void delete_insn_chain (rtx, rtx);
2217 extern rtx unlink_insn_chain (rtx, rtx);
2218 extern rtx delete_insn_and_edges (rtx);
2219 extern void delete_insn_chain_and_edges (rtx, rtx);
2220 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2223 extern int combine_instructions (rtx, unsigned int);
2224 extern unsigned int extended_count (rtx, enum machine_mode, int);
2225 extern rtx remove_death (unsigned int, rtx);
2227 extern void dump_combine_stats (FILE *);
2228 extern void dump_combine_total_stats (FILE *);
2231 extern void web_main (void);
2233 /* In sched-rgn.c. */
2235 extern void schedule_insns (FILE *);
2238 /* In sched-ebb.c. */
2240 extern void schedule_ebbs (FILE *);
2243 /* In haifa-sched.c. */
2244 extern void fix_sched_param (const char *, const char *);
2246 /* In print-rtl.c */
2247 extern const char *print_rtx_head;
2248 extern void debug_rtx (rtx);
2249 extern void debug_rtx_list (rtx, int);
2250 extern void debug_rtx_range (rtx, rtx);
2251 extern rtx debug_rtx_find (rtx, int);
2253 extern void print_mem_expr (FILE *, tree);
2254 extern void print_rtl (FILE *, rtx);
2255 extern void print_simple_rtl (FILE *, rtx);
2256 extern int print_rtl_single (FILE *, rtx);
2257 extern void print_inline_rtx (FILE *, rtx, int);
2261 extern void init_loop (void);
2263 extern void loop_optimize (rtx, FILE *, int);
2265 extern void branch_target_load_optimize (bool);
2268 extern void reposition_prologue_and_epilogue_notes (rtx);
2269 extern void thread_prologue_and_epilogue_insns (rtx);
2270 extern int prologue_epilogue_contains (rtx);
2271 extern int sibcall_epilogue_contains (rtx);
2272 extern void mark_temp_addr_taken (rtx);
2273 extern void update_temp_slot_address (rtx, rtx);
2274 extern void purge_hard_subreg_sets (rtx);
2277 extern void set_file_and_line_for_stmt (location_t);
2278 extern void expand_null_return (void);
2279 extern void expand_naked_return (void);
2280 extern void emit_jump (rtx);
2281 extern int preserve_subexpressions_p (void);
2284 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2288 extern void recompute_reg_usage (rtx, int);
2289 extern int initialize_uninitialized_subregs (void);
2290 extern void delete_dead_jumptables (void);
2292 extern void print_rtl_with_bb (FILE *, rtx);
2293 extern void dump_flow_info (FILE *);
2297 extern void init_expmed (void);
2298 extern void expand_inc (rtx, rtx);
2299 extern void expand_dec (rtx, rtx);
2300 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2301 unsigned HOST_WIDE_INT, rtx, int, int);
2304 extern bool can_copy_p (enum machine_mode);
2305 extern rtx fis_get_condition (rtx);
2307 extern int gcse_main (rtx, FILE *);
2308 extern int bypass_jumps (FILE *);
2309 extern void gcse_after_reload_main (rtx, FILE *);
2313 extern void mark_elimination (int, int);
2315 extern int global_alloc (FILE *);
2316 extern void dump_global_regs (FILE *);
2319 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2320 extern void retry_global_alloc (int, HARD_REG_SET);
2322 extern void build_insn_chain (rtx);
2325 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2326 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2327 extern void globalize_reg (int);
2328 extern void init_reg_modes_once (void);
2329 extern void init_regs (void);
2330 extern void init_fake_stack_mems (void);
2331 extern void init_reg_sets (void);
2332 extern void regset_release_memory (void);
2333 extern void regclass_init (void);
2334 extern void regclass (rtx, int, FILE *);
2335 extern void reg_scan (rtx, unsigned int, int);
2336 extern void reg_scan_update (rtx, rtx, unsigned int);
2337 extern void fix_register (const char *, int, int);
2339 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2340 enum machine_mode, unsigned int);
2342 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2347 extern void regmove_optimize (rtx, int, FILE *);
2349 extern void combine_stack_adjustments (void);
2353 extern void dbr_schedule (rtx, FILE *);
2356 /* In local-alloc.c */
2358 extern void dump_local_alloc (FILE *);
2360 extern int local_alloc (void);
2362 /* In reg-stack.c */
2364 extern bool reg_to_stack (FILE *);
2373 LCT_CONST_MAKE_BLOCK = 3,
2374 LCT_PURE_MAKE_BLOCK = 4,
2377 LCT_ALWAYS_RETURN = 7,
2378 LCT_RETURNS_TWICE = 8
2381 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2383 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2384 enum machine_mode, int, ...);
2387 extern int set_dominates_use (int, int, int, rtx, rtx);
2390 extern int in_data_section (void);
2391 extern void init_varasm_once (void);
2394 extern void init_rtl (void);
2395 extern void traverse_md_constants (int (*) (void **, void *), void *);
2396 struct md_constant { char *name, *value; };
2399 extern int read_skip_spaces (FILE *);
2400 extern rtx read_rtx (FILE *);
2403 extern const char *read_rtx_filename;
2404 extern int read_rtx_lineno;
2406 /* Redefine abort to report an internal error w/o coredump, and
2407 reporting the location of the error in the source file. This logic
2408 is duplicated in rtl.h and tree.h because every file that needs the
2409 special abort includes one or both. toplev.h gets too few files,
2410 system.h gets too many. */
2412 extern void fancy_abort (const char *, int, const char *)
2414 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2417 extern void clear_reg_alias_info (rtx);
2418 extern rtx canon_rtx (rtx);
2419 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2420 extern rtx get_addr (rtx);
2421 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2423 extern int read_dependence (rtx, rtx);
2424 extern int anti_dependence (rtx, rtx);
2425 extern int output_dependence (rtx, rtx);
2426 extern int unchanging_anti_dependence (rtx, rtx);
2427 extern void mark_constant_function (void);
2428 extern void init_alias_once (void);
2429 extern void init_alias_analysis (void);
2430 extern void end_alias_analysis (void);
2431 extern rtx addr_side_effect_eval (rtx, int, int);
2432 extern bool memory_modified_in_insn_p (rtx, rtx);
2433 extern rtx find_base_term (rtx);
2434 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2435 extern rtx get_reg_known_value (unsigned int);
2436 extern bool get_reg_known_equiv_p (unsigned int);
2439 extern int stack_regs_mentioned (rtx insn);
2443 extern GTY(()) rtx stack_limit_rtx;
2445 /* In regrename.c */
2446 extern void regrename_optimize (void);
2447 extern void copyprop_hardreg_forward (void);
2450 extern void if_convert (int);
2453 extern void invert_br_probabilities (rtx);
2454 extern bool expensive_function_p (int);
2456 extern void tracer (void);
2458 /* In var-tracking.c */
2459 extern void variable_tracking_main (void);
2461 /* In stor-layout.c. */
2462 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2465 /* In loop-unswitch.c */
2466 extern rtx reversed_condition (rtx);
2467 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2470 extern rtx canon_condition (rtx);
2471 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2474 extern void reg_alloc (void);
2476 /* In modulo-sched.c. */
2478 extern void sms_schedule (FILE *);
2483 rtx (*gen_lowpart) (enum machine_mode, rtx);
2484 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2485 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2486 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2487 unsigned int, unsigned int *);
2489 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2492 /* Each pass can provide its own. */
2493 extern struct rtl_hooks rtl_hooks;
2495 /* ... but then it has to restore these. */
2496 extern const struct rtl_hooks general_rtl_hooks;
2498 /* Keep this for the nonce. */
2499 #define gen_lowpart rtl_hooks.gen_lowpart
2501 #endif /* ! GCC_RTL_H */
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