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
25 #include "statistics.h"
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
34 /* Value used by some passes to "recognize" noop moves as valid
36 #define NOOP_MOVE_INSN_CODE INT_MAX
38 /* Register Transfer Language EXPRESSIONS CODES */
40 #define RTX_CODE enum rtx_code
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
49 Assumes default enum value assignment. */
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
54 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
57 /* We check bit 0-1 of some rtx class codes in the predicates below. */
59 /* Bit 0 = comparison if 0, arithmetic is 1
60 Bit 1 = 1 if commutative. */
66 /* Must follow the four preceding values. */
73 /* Bit 0 = 1 if constant. */
82 #define RTX_OBJ_MASK (~1)
83 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
84 #define RTX_COMPARE_MASK (~1)
85 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
86 #define RTX_ARITHMETIC_MASK (~1)
87 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
88 #define RTX_BINARY_MASK (~3)
89 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
90 #define RTX_COMMUTATIVE_MASK (~2)
91 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
92 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
93 #define RTX_EXPR_FIRST (RTX_COMPARE)
94 #define RTX_EXPR_LAST (RTX_UNARY)
96 extern const unsigned char rtx_length[NUM_RTX_CODE];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
99 extern const char * const rtx_name[NUM_RTX_CODE];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
102 extern const char * const rtx_format[NUM_RTX_CODE];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
105 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
108 extern const unsigned char rtx_size[NUM_RTX_CODE];
109 extern const unsigned char rtx_next[NUM_RTX_CODE];
111 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
112 relative to which the offsets are calculated, as explained in rtl.def. */
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align: 8;
118 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
119 unsigned min_after_vec: 1; /* minimum address target label is
120 after the ADDR_DIFF_VEC. */
121 unsigned max_after_vec: 1; /* maximum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned min_after_base: 1; /* minimum address target label is
125 unsigned max_after_base: 1; /* maximum address target label is
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
131 } addr_diff_vec_flags;
133 /* Structure used to describe the attributes of a MEM. These are hashed
134 so MEMs that the same attributes share a data structure. This means
135 they cannot be modified in place. If any element is nonzero, it means
136 the value of the corresponding attribute is unknown. */
137 /* ALIGN and SIZE are the alignment and size of the MEM itself,
138 while EXPR can describe a larger underlying object, which might have a
139 stricter alignment; OFFSET is the offset of the MEM within that object. */
140 typedef struct mem_attrs GTY(())
142 HOST_WIDE_INT alias; /* Memory alias set. */
143 tree expr; /* expr corresponding to MEM. */
144 rtx offset; /* Offset from start of DECL, as CONST_INT. */
145 rtx size; /* Size in bytes, as a CONST_INT. */
146 unsigned int align; /* Alignment of MEM in bits. */
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
152 typedef struct reg_attrs GTY(())
154 tree decl; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset; /* Offset from start of DECL. */
158 /* Common union for an element of an rtx. */
163 unsigned int rt_uint;
167 enum machine_mode rt_type;
168 addr_diff_vec_flags rt_addr_diff_vec_flags;
169 struct cselib_val_struct *rt_cselib;
170 struct bitmap_head_def *rt_bit;
172 struct basic_block_def *rt_bb;
176 typedef union rtunion_def rtunion;
178 /* RTL expression ("rtx"). */
180 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
181 chain_prev ("RTX_PREV (&%h)")))
183 /* The kind of expression this is. */
184 ENUM_BITFIELD(rtx_code) code: 16;
186 /* The kind of value the expression has. */
187 ENUM_BITFIELD(machine_mode) mode : 8;
189 /* 1 in a MEM if we should keep the alias set for this mem unchanged
190 when we access a component.
191 1 in a CALL_INSN if it is a sibling call.
192 1 in a SET that is for a return.
193 In a CODE_LABEL, part of the two-bit alternate entry field. */
194 unsigned int jump : 1;
195 /* In a CODE_LABEL, part of the two-bit alternate entry field.
196 1 in a MEM if it cannot trap. */
197 unsigned int call : 1;
198 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
199 1 in a SUBREG if it references an unsigned object whose mode has been
200 from a promoted to a wider mode.
201 1 in a SYMBOL_REF if it addresses something in the per-function
203 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
204 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
205 unsigned int unchanging : 1;
206 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
207 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
208 if it has been deleted.
209 1 in a REG expression if corresponds to a variable declared by the user,
210 0 for an internally generated temporary.
211 1 in a SUBREG with a negative value.
212 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
213 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
214 unsigned int volatil : 1;
215 /* 1 in a MEM referring to a field of an aggregate.
216 0 if the MEM was a variable or the result of a * operator in C;
217 1 if it was the result of a . or -> operator (on a struct) in C.
218 1 in a REG if the register is used only in exit code a loop.
219 1 in a SUBREG expression if was generated from a variable with a
221 1 in a CODE_LABEL if the label is used for nonlocal gotos
222 and must not be deleted even if its count is zero.
223 1 in a LABEL_REF if this is a reference to a label outside the
225 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
226 together with the preceding insn. Valid only within sched.
227 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
228 from the target of a branch. Valid from reorg until end of compilation;
230 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
231 dead code. Valid only during dead-code elimination phase; cleared
233 unsigned int in_struct : 1;
234 /* At the end of RTL generation, 1 if this rtx is used. This is used for
235 copying shared structure. See `unshare_all_rtl'.
236 In a REG, this is not needed for that purpose, and used instead
237 in `leaf_renumber_regs_insn'.
238 1 in a SYMBOL_REF, means that emit_library_call
239 has used it as the function. */
240 unsigned int used : 1;
241 /* 1 in an INSN or a SET if this rtx is related to the call frame,
242 either changing how we compute the frame address or saving and
243 restoring registers in the prologue and epilogue.
244 1 in a REG or MEM if it is a pointer.
245 1 in a SYMBOL_REF if it addresses something in the per-function
246 constant string pool. */
247 unsigned frame_related : 1;
248 /* 1 in a REG or PARALLEL that is the current function's return value.
249 1 in a MEM if it refers to a scalar.
250 1 in a SYMBOL_REF for a weak symbol. */
251 unsigned return_val : 1;
253 /* The first element of the operands of this rtx.
254 The number of operands and their types are controlled
255 by the `code' field, according to rtl.def. */
258 HOST_WIDE_INT hwint[1];
259 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
262 /* The size in bytes of an rtx header (code, mode and flags). */
263 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
265 /* The size in bytes of an rtx with code CODE. */
266 #define RTX_SIZE(CODE) rtx_size[CODE]
268 #define NULL_RTX (rtx) 0
270 /* The "next" and "previous" RTX, relative to this one. */
272 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
273 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
275 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
277 #define RTX_PREV(X) ((INSN_P (X) \
281 && PREV_INSN (X) != NULL \
282 && NEXT_INSN (PREV_INSN (X)) == X \
283 ? PREV_INSN (X) : NULL)
285 /* Define macros to access the `code' field of the rtx. */
287 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
288 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
290 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
291 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
293 /* RTL vector. These appear inside RTX's when there is a need
294 for a variable number of things. The principle use is inside
295 PARALLEL expressions. */
297 struct rtvec_def GTY(()) {
298 int num_elem; /* number of elements */
299 rtx GTY ((length ("%h.num_elem"))) elem[1];
302 #define NULL_RTVEC (rtvec) 0
304 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
305 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
307 /* Predicate yielding nonzero iff X is an rtx for a register. */
308 #define REG_P(X) (GET_CODE (X) == REG)
310 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
311 #define MEM_P(X) (GET_CODE (X) == MEM)
313 /* Predicate yielding nonzero iff X is a label insn. */
314 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
316 /* Predicate yielding nonzero iff X is a jump insn. */
317 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
319 /* Predicate yielding nonzero iff X is a call insn. */
320 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
322 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
323 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
325 /* Predicate yielding nonzero iff X is a real insn. */
327 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
329 /* Predicate yielding nonzero iff X is a note insn. */
330 #define NOTE_P(X) (GET_CODE (X) == NOTE)
332 /* Predicate yielding nonzero iff X is a barrier insn. */
333 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
335 /* Predicate yielding nonzero iff X is a data for a jump table. */
336 #define JUMP_TABLE_DATA_P(INSN) \
337 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
338 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
340 /* 1 if X is a unary operator. */
343 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
345 /* 1 if X is a binary operator. */
347 #define BINARY_P(X) \
348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
350 /* 1 if X is an arithmetic operator. */
352 #define ARITHMETIC_P(X) \
353 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
354 == RTX_ARITHMETIC_RESULT)
356 /* 1 if X is an arithmetic operator. */
358 #define COMMUTATIVE_ARITH_P(X) \
359 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
361 /* 1 if X is a commutative arithmetic operator or a comparison operator.
362 These two are sometimes selected together because it is possible to
363 swap the two operands. */
365 #define SWAPPABLE_OPERANDS_P(X) \
366 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
367 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
368 | (1 << RTX_COMPARE)))
370 /* 1 if X is a non-commutative operator. */
372 #define NON_COMMUTATIVE_P(X) \
373 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
374 == RTX_NON_COMMUTATIVE_RESULT)
376 /* 1 if X is a commutative operator on integers. */
378 #define COMMUTATIVE_P(X) \
379 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
380 == RTX_COMMUTATIVE_RESULT)
382 /* 1 if X is a relational operator. */
384 #define COMPARISON_P(X) \
385 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
387 /* 1 if X is a constant value that is an integer. */
389 #define CONSTANT_P(X) \
390 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
391 || GET_CODE (X) == CONST_VECTOR)
393 /* 1 if X can be used to represent an object. */
394 #define OBJECT_P(X) \
395 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
397 /* General accessor macros for accessing the fields of an rtx. */
399 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
400 /* The bit with a star outside the statement expr and an & inside is
401 so that N can be evaluated only once. */
402 #define RTL_CHECK1(RTX, N, C1) __extension__ \
403 (*({ rtx const _rtx = (RTX); const int _n = (N); \
404 const enum rtx_code _code = GET_CODE (_rtx); \
405 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
406 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
408 if (GET_RTX_FORMAT(_code)[_n] != C1) \
409 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
411 &_rtx->u.fld[_n]; }))
413 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
414 (*({ rtx const _rtx = (RTX); const int _n = (N); \
415 const enum rtx_code _code = GET_CODE (_rtx); \
416 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
417 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
419 if (GET_RTX_FORMAT(_code)[_n] != C1 \
420 && GET_RTX_FORMAT(_code)[_n] != C2) \
421 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
423 &_rtx->u.fld[_n]; }))
425 #define RTL_CHECKC1(RTX, N, C) __extension__ \
426 (*({ rtx const _rtx = (RTX); const int _n = (N); \
427 if (GET_CODE (_rtx) != (C)) \
428 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
430 &_rtx->u.fld[_n]; }))
432 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
433 (*({ rtx const _rtx = (RTX); const int _n = (N); \
434 const enum rtx_code _code = GET_CODE (_rtx); \
435 if (_code != (C1) && _code != (C2)) \
436 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
438 &_rtx->u.fld[_n]; }))
440 #define RTVEC_ELT(RTVEC, I) __extension__ \
441 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
442 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
443 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
445 &_rtvec->elem[_i]; }))
447 #define XWINT(RTX, N) __extension__ \
448 (*({ rtx const _rtx = (RTX); const int _n = (N); \
449 const enum rtx_code _code = GET_CODE (_rtx); \
450 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
451 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
453 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
454 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
456 &_rtx->u.hwint[_n]; }))
458 #define XCWINT(RTX, N, C) __extension__ \
459 (*({ rtx const _rtx = (RTX); \
460 if (GET_CODE (_rtx) != (C)) \
461 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
463 &_rtx->u.hwint[N]; }))
465 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
468 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
471 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
474 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
477 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
478 const char *, int, const char *)
480 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
484 #else /* not ENABLE_RTL_CHECKING */
486 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
487 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
488 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
489 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
490 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
491 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
492 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
496 /* General accessor macros for accessing the flags of an rtx. */
498 /* Access an individual rtx flag, with no checking of any kind. */
499 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
501 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
502 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
503 ({ rtx const _rtx = (RTX); \
504 if (GET_CODE(_rtx) != C1) \
505 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
509 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
510 ({ rtx const _rtx = (RTX); \
511 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
512 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
516 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
517 ({ rtx const _rtx = (RTX); \
518 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
519 && GET_CODE(_rtx) != C3) \
520 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
524 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
525 ({ rtx const _rtx = (RTX); \
526 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
527 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
528 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
532 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
533 ({ rtx const _rtx = (RTX); \
534 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
535 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
536 && GET_CODE(_rtx) != C5) \
537 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
541 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
543 ({ rtx const _rtx = (RTX); \
544 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
545 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
546 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
547 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
551 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
553 ({ rtx const _rtx = (RTX); \
554 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
555 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
556 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
557 && GET_CODE(_rtx) != C7) \
558 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
562 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
564 ({ rtx const _rtx = (RTX); \
565 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
566 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
567 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
568 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
569 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
573 extern void rtl_check_failed_flag (const char *, rtx, const char *,
578 #else /* not ENABLE_RTL_FLAG_CHECKING */
580 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
581 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
582 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
583 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
584 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
585 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
586 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
587 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
590 #define CLEAR_RTX_FLAGS(RTX) \
592 rtx const _rtx = (RTX); \
595 _rtx->unchanging = 0; \
597 _rtx->in_struct = 0; \
599 _rtx->frame_related = 0; \
600 _rtx->return_val = 0; \
603 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
604 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
605 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
606 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
607 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
608 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
609 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
610 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
611 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
613 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
614 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
616 /* These are like XINT, etc. except that they expect a '0' field instead
617 of the normal type code. */
619 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
620 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
621 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
622 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
623 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
624 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
625 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
626 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
627 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
628 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
629 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
630 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
631 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
633 /* Access a '0' field with any type. */
634 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
636 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
637 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
638 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
639 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
640 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
641 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
642 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
643 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
644 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
645 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
646 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
648 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
649 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
651 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
653 /* ACCESS MACROS for particular fields of insns. */
655 /* Holds a unique number for each insn.
656 These are not necessarily sequentially increasing. */
657 #define INSN_UID(INSN) XINT (INSN, 0)
659 /* Chain insns together in sequence. */
660 #define PREV_INSN(INSN) XEXP (INSN, 1)
661 #define NEXT_INSN(INSN) XEXP (INSN, 2)
663 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
664 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
665 /* The body of an insn. */
666 #define PATTERN(INSN) XEXP (INSN, 5)
668 /* Code number of instruction, from when it was recognized.
669 -1 means this instruction has not been recognized yet. */
670 #define INSN_CODE(INSN) XINT (INSN, 6)
672 /* Set up in flow.c; empty before then.
673 Holds a chain of INSN_LIST rtx's whose first operands point at
674 previous insns with direct data-flow connections to this one.
675 That means that those insns set variables whose next use is in this insn.
676 They are always in the same basic block as this insn. */
677 #define LOG_LINKS(INSN) XEXP(INSN, 7)
679 #define RTX_FRAME_RELATED_P(RTX) \
680 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
681 JUMP_INSN, BARRIER, SET)->frame_related)
683 /* 1 if RTX is an insn that has been deleted. */
684 #define INSN_DELETED_P(RTX) \
685 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
686 CODE_LABEL, BARRIER, NOTE)->volatil)
688 /* 1 if RTX is a call to a const or pure function. */
689 #define CONST_OR_PURE_CALL_P(RTX) \
690 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
691 EXPR_LIST)->unchanging)
693 /* 1 if RTX is a call_insn for a sibling call. */
694 #define SIBLING_CALL_P(RTX) \
695 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
697 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
698 #define INSN_ANNULLED_BRANCH_P(RTX) \
699 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
701 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
702 elimination phase. */
703 #define INSN_DEAD_CODE_P(RTX) \
704 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
706 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
707 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
708 executed if the branch is taken. For annulled branches with this bit
709 clear, the insn should be executed only if the branch is not taken. */
710 #define INSN_FROM_TARGET_P(RTX) \
711 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
713 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
715 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
717 /* Holds a list of notes on what this insn does to various REGs.
718 It is a chain of EXPR_LIST rtx's, where the second operand is the
719 chain pointer and the first operand is the REG being described.
720 The mode field of the EXPR_LIST contains not a real machine mode
721 but a value from enum reg_note. */
723 #define REG_NOTES(INSN) XEXP(INSN, 8)
725 /* Don't forget to change reg_note_name in rtl.c. */
728 /* The value in REG dies in this insn (i.e., it is not needed past
729 this insn). If REG is set in this insn, the REG_DEAD note may,
730 but need not, be omitted. */
733 /* The REG is autoincremented or autodecremented. */
736 /* Describes the insn as a whole; it says that the insn sets a register
737 to a constant value or to be equivalent to a memory address. If the
738 register is spilled to the stack then the constant value should be
739 substituted for it. The contents of the REG_EQUIV is the constant
740 value or memory address, which may be different from the source of
741 the SET although it has the same value. A REG_EQUIV note may also
742 appear on an insn which copies a register parameter to a pseudo-register,
743 if there is a memory address which could be used to hold that
744 pseudo-register throughout the function. */
747 /* Like REG_EQUIV except that the destination is only momentarily equal
748 to the specified rtx. Therefore, it cannot be used for substitution;
749 but it can be used for cse. */
752 /* This insn copies the return-value of a library call out of the hard reg
753 for return values. This note is actually an INSN_LIST and it points to
754 the first insn involved in setting up arguments for the call. flow.c
755 uses this to delete the entire library call when its result is dead. */
758 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
759 and points at the one that has the REG_RETVAL. This note is also an
763 /* The register is always nonnegative during the containing loop. This is
764 used in branches so that decrement and branch instructions terminating
765 on zero can be matched. There must be an insn pattern in the md file
766 named `decrement_and_branch_until_zero' or else this will never be added
767 to any instructions. */
770 /* There is no conflict *after this insn* between the register in the note
771 and the destination of this insn. */
774 /* Identifies a register set in this insn and never used. */
777 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
778 respectively. Normally, these are required to be consecutive insns, but
779 we permit putting a cc0-setting insn in the delay slot of a branch as
780 long as only one copy of the insn exists. In that case, these notes
781 point from one to the other to allow code generation to determine what
782 any require information and to properly update CC_STATUS. These notes
784 REG_CC_SETTER, REG_CC_USER,
786 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
787 CODE_LABEL contained in the REG_LABEL note is used by the insn.
788 This note is an INSN_LIST. */
791 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
792 write-after-read and write-after-write dependencies respectively.
793 Data dependencies, which are the only type of LOG_LINK created by
794 flow, are represented by a 0 reg note kind. */
795 REG_DEP_ANTI, REG_DEP_OUTPUT,
797 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
798 It has an integer value. For jumps, it is the probability that this is a
799 taken branch. For calls, it is the probability that this call won't
803 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn
804 before that the code to profile the value is inserted. It contains
805 the results of profiling. */
808 /* Attached to a call insn; indicates that the call is malloc-like and
809 that the pointer returned cannot alias anything else. */
812 /* Used to optimize rtl generated by dynamic stack allocations for targets
813 where SETJMP_VIA_SAVE_AREA is true. */
816 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
817 CONCAT of two integer value. First specifies the branch predictor
818 that added the note, second specifies the predicted hitrate of branch
819 in the same format as REG_BR_PROB note uses. */
822 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
823 for DWARF to interpret what they imply. The attached rtx is used
824 instead of intuition. */
825 REG_FRAME_RELATED_EXPR,
827 /* Indicates that REG holds the exception context for the function.
828 This context is shared by inline functions, so the code to acquire
829 the real exception context is delayed until after inlining. */
832 /* Indicates what exception region an INSN belongs in. This is used to
833 indicate what region to which a call may throw. REGION 0 indicates
834 that a call cannot throw at all. REGION -1 indicates that it cannot
835 throw, nor will it execute a non-local goto. */
838 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
841 /* Indicates that this insn (which is part of the prologue) computes
842 a value which might not be used later, and if so it's OK to delete
843 the insn. Normally, deleting any insn in the prologue is an error.
844 At present the parameter is unused and set to (const_int 0). */
847 /* Indicates that a call does not return. */
850 /* Indicates that an indirect jump is a non-local goto instead of a
854 /* Indicates that a jump crosses between hot and cold sections
855 in a (partitioned) assembly or .o file, and therefore should not be
856 reduced to a simpler jump by optimizations. */
859 /* This kind of note is generated at each to `setjmp',
860 and similar functions that can return twice. */
863 /* Indicate calls that always returns. */
867 /* The base value for branch probability notes. */
868 #define REG_BR_PROB_BASE 10000
870 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
871 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
872 #define PUT_REG_NOTE_KIND(LINK, KIND) \
873 PUT_MODE (LINK, (enum machine_mode) (KIND))
875 /* Names for REG_NOTE's in EXPR_LIST insn's. */
877 extern const char * const reg_note_name[];
878 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
880 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
881 USE and CLOBBER expressions.
882 USE expressions list the registers filled with arguments that
883 are passed to the function.
884 CLOBBER expressions document the registers explicitly clobbered
886 Pseudo registers can not be mentioned in this list. */
887 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
889 /* The label-number of a code-label. The assembler label
890 is made from `L' and the label-number printed in decimal.
891 Label numbers are unique in a compilation. */
892 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
894 #define LINE_NUMBER NOTE
896 /* In a NOTE that is a line number, this is a string for the file name that the
897 line is in. We use the same field to record block numbers temporarily in
898 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
899 between ints and pointers if we use a different macro for the block number.)
903 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
904 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
905 #ifdef USE_MAPPED_LOCATION
906 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
907 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
908 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
909 #define SET_INSN_DELETED(INSN) \
910 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
912 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
913 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
914 (XLOC).line = NOTE_LINE_NUMBER (INSN))
915 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
916 #define SET_INSN_DELETED(INSN) \
917 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
918 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
920 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
921 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
922 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
923 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
924 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
925 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
926 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
928 /* In a NOTE that is a line number, this is the line number.
929 Other kinds of NOTEs are identified by negative numbers here. */
930 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
932 /* Nonzero if INSN is a note marking the beginning of a basic block. */
933 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
934 (GET_CODE (INSN) == NOTE \
935 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
937 /* Algorithm and flags for prediction. */
938 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
939 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
940 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
942 /* Variable declaration and the location of a variable. */
943 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
945 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
948 /* Codes that appear in the NOTE_LINE_NUMBER field
949 for kinds of notes that are not line numbers.
951 Notice that we do not try to use zero here for any of
952 the special note codes because sometimes the source line
953 actually can be zero! This happens (for example) when we
954 are generating code for the per-translation-unit constructor
955 and destructor routines for some C++ translation unit.
957 If you should change any of the following values, or if you
958 should add a new value here, don't forget to change the
959 note_insn_name array in rtl.c. */
963 /* Keep all of these numbers negative. Adjust as needed. */
964 NOTE_INSN_BIAS = -100,
966 /* This note is used to get rid of an insn
967 when it isn't safe to patch the insn out of the chain. */
970 /* These are used to mark the beginning and end of a lexical block.
971 See NOTE_BLOCK and reorder_blocks. */
975 /* These mark the extremes of a loop. */
979 /* Generated at the place in a loop that `continue' jumps to. */
981 /* Generated at the start of a duplicated exit test. */
984 /* Mark that a block shouldn't be scheduled. This is currently
985 used in modulo scheduling. Modulo scheduling adds this note
986 to the blocks of the modulo-scheduled loops to disable scheduling
987 them in the later traditional scheduling passes. */
988 NOTE_DISABLE_SCHED_OF_BLOCK,
990 /* This kind of note is generated at the end of the function body,
991 just before the return insn or return label. In an optimizing
992 compilation it is deleted by the first jump optimization, after
993 enabling that optimizer to determine whether control can fall
994 off the end of the function body without a return statement. */
995 NOTE_INSN_FUNCTION_END,
997 /* This marks the point immediately after the last prologue insn. */
998 NOTE_INSN_PROLOGUE_END,
1000 /* This marks the point immediately prior to the first epilogue insn. */
1001 NOTE_INSN_EPILOGUE_BEG,
1003 /* Generated in place of user-declared labels when they are deleted. */
1004 NOTE_INSN_DELETED_LABEL,
1006 /* This note indicates the start of the real body of the function,
1007 i.e. the point just after all of the parms have been moved into
1008 their homes, etc. */
1009 NOTE_INSN_FUNCTION_BEG,
1011 /* These note where exception handling regions begin and end.
1012 Uses NOTE_EH_HANDLER to identify the region in question. */
1013 NOTE_INSN_EH_REGION_BEG,
1014 NOTE_INSN_EH_REGION_END,
1016 /* Generated whenever a duplicate line number note is output. For example,
1017 one is output after the end of an inline function, in order to prevent
1018 the line containing the inline call from being counted twice in gcov. */
1019 NOTE_INSN_REPEATED_LINE_NUMBER,
1021 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
1022 NOTE_INSN_BASIC_BLOCK,
1024 /* Record the expected value of a register at a location. Uses
1025 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
1026 NOTE_INSN_EXPECTED_VALUE,
1028 /* Record that the current basic block is unlikely to be executed and
1029 should be moved to the UNLIKELY_EXECUTED_TEXT_SECTION. */
1030 NOTE_INSN_UNLIKELY_EXECUTED_CODE,
1032 /* The location of a variable. */
1033 NOTE_INSN_VAR_LOCATION,
1038 /* Names for NOTE insn's other than line numbers. */
1040 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
1041 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1042 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
1044 /* The name of a label, in case it corresponds to an explicit label
1045 in the input source code. */
1046 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1048 /* In jump.c, each label contains a count of the number
1049 of LABEL_REFs that point at it, so unused labels can be deleted. */
1050 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
1052 /* Labels carry a two-bit field composed of the ->jump and ->call
1053 bits. This field indicates whether the label is an alternate
1054 entry point, and if so, what kind. */
1057 LABEL_NORMAL = 0, /* ordinary label */
1058 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1059 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1060 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1063 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1065 /* Retrieve the kind of LABEL. */
1066 #define LABEL_KIND(LABEL) __extension__ \
1067 ({ rtx const _label = (LABEL); \
1068 if (GET_CODE (_label) != CODE_LABEL) \
1069 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1071 (enum label_kind) ((_label->jump << 1) | _label->call); })
1073 /* Set the kind of LABEL. */
1074 #define SET_LABEL_KIND(LABEL, KIND) do { \
1075 rtx _label = (LABEL); \
1076 unsigned int _kind = (KIND); \
1077 if (GET_CODE (_label) != CODE_LABEL) \
1078 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1080 _label->jump = ((_kind >> 1) & 1); \
1081 _label->call = (_kind & 1); \
1086 /* Retrieve the kind of LABEL. */
1087 #define LABEL_KIND(LABEL) \
1088 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1090 /* Set the kind of LABEL. */
1091 #define SET_LABEL_KIND(LABEL, KIND) do { \
1092 rtx _label = (LABEL); \
1093 unsigned int _kind = (KIND); \
1094 _label->jump = ((_kind >> 1) & 1); \
1095 _label->call = (_kind & 1); \
1098 #endif /* rtl flag checking */
1100 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1102 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1103 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1104 be decremented and possibly the label can be deleted. */
1105 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
1107 /* Once basic blocks are found in flow.c,
1108 each CODE_LABEL starts a chain that goes through
1109 all the LABEL_REFs that jump to that label.
1110 The chain eventually winds up at the CODE_LABEL: it is circular. */
1111 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1113 /* This is the field in the LABEL_REF through which the circular chain
1114 of references to a particular label is linked.
1115 This chain is set up in flow.c. */
1117 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
1119 /* Once basic blocks are found in flow.c,
1120 Each LABEL_REF points to its containing instruction with this field. */
1122 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
1124 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
1125 the number the register originally had; for a pseudo register turned into
1126 a hard reg this will hold the old pseudo register number. */
1128 #define REGNO(RTX) XCUINT (RTX, 0, REG)
1129 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1131 /* 1 if RTX is a reg or parallel that is the current function's return
1133 #define REG_FUNCTION_VALUE_P(RTX) \
1134 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1136 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1137 #define REG_USERVAR_P(RTX) \
1138 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1140 /* 1 if RTX is a reg that holds a pointer value. */
1141 #define REG_POINTER(RTX) \
1142 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1144 /* 1 if RTX is a mem that holds a pointer value. */
1145 #define MEM_POINTER(RTX) \
1146 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1148 /* 1 if the given register REG corresponds to a hard register. */
1149 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1151 /* 1 if the given register number REG_NO corresponds to a hard register. */
1152 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1154 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1156 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1158 /* For a CONST_DOUBLE:
1159 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1160 low-order word and ..._HIGH the high-order.
1161 For a float, there is a REAL_VALUE_TYPE structure, and
1162 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1163 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1164 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1165 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1167 /* For a CONST_VECTOR, return element #n. */
1168 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1170 /* For a CONST_VECTOR, return the number of elements in a vector. */
1171 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1173 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1174 SUBREG_BYTE extracts the byte-number. */
1176 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1177 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1180 /* Return the right cost to give to an operation
1181 to make the cost of the corresponding register-to-register instruction
1182 N times that of a fast register-to-register instruction. */
1183 #define COSTS_N_INSNS(N) ((N) * 4)
1185 /* Maximum cost of an rtl expression. This value has the special meaning
1186 not to use an rtx with this cost under any circumstances. */
1187 #define MAX_COST INT_MAX
1189 extern int rtx_cost (rtx, enum rtx_code);
1190 extern int address_cost (rtx, enum machine_mode);
1191 extern unsigned int subreg_lsb (rtx);
1192 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1194 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1195 unsigned int, enum machine_mode);
1196 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1197 unsigned int, enum machine_mode);
1198 extern unsigned int subreg_regno (rtx);
1199 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1200 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1203 /* 1 if RTX is a subreg containing a reg that is already known to be
1204 sign- or zero-extended from the mode of the subreg to the mode of
1205 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1208 When used as a LHS, is means that this extension must be done
1209 when assigning to SUBREG_REG. */
1211 #define SUBREG_PROMOTED_VAR_P(RTX) \
1212 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1214 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1216 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1218 _rtx->volatil = 1; \
1220 _rtx->volatil = 0; \
1221 _rtx->unchanging = (VAL); \
1224 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1225 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1226 ? -1 : (RTX)->unchanging)
1228 /* Access various components of an ASM_OPERANDS rtx. */
1230 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1231 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1232 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1233 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1234 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1235 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1236 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1237 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1238 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1239 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1240 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1241 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1242 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1243 #ifdef USE_MAPPED_LOCATION
1244 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1246 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1247 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1250 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1251 #define MEM_READONLY_P(RTX) \
1252 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1254 /* 1 if RTX is a mem and we should keep the alias set for this mem
1255 unchanged when we access a component. Set to 1, or example, when we
1256 are already in a non-addressable component of an aggregate. */
1257 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1258 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1260 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1261 #define MEM_VOLATILE_P(RTX) \
1262 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1263 ASM_INPUT)->volatil)
1265 /* 1 if RTX is a mem that refers to an aggregate, either to the
1266 aggregate itself of to a field of the aggregate. If zero, RTX may
1267 or may not be such a reference. */
1268 #define MEM_IN_STRUCT_P(RTX) \
1269 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1271 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1272 not refer to a scalar. */
1273 #define MEM_SCALAR_P(RTX) \
1274 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1276 /* 1 if RTX is a mem that cannot trap. */
1277 #define MEM_NOTRAP_P(RTX) \
1278 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1280 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1281 RTX. Otherwise, vice versa. Use this macro only when you are
1282 *sure* that you know that the MEM is in a structure, or is a
1283 scalar. VAL is evaluated only once. */
1284 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1288 MEM_IN_STRUCT_P (RTX) = 1; \
1289 MEM_SCALAR_P (RTX) = 0; \
1293 MEM_IN_STRUCT_P (RTX) = 0; \
1294 MEM_SCALAR_P (RTX) = 1; \
1298 /* The memory attribute block. We provide access macros for each value
1299 in the block and provide defaults if none specified. */
1300 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1302 /* The register attribute block. We provide access macros for each value
1303 in the block and provide defaults if none specified. */
1304 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1306 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1307 set, and may alias anything. Otherwise, the MEM can only alias
1308 MEMs in a conflicting alias set. This value is set in a
1309 language-dependent manner in the front-end, and should not be
1310 altered in the back-end. These set numbers are tested with
1311 alias_sets_conflict_p. */
1312 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1314 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1315 refer to part of a DECL. It may also be a COMPONENT_REF. */
1316 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1318 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1319 RTX that is always a CONST_INT. */
1320 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1322 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1323 is always a CONST_INT. */
1324 #define MEM_SIZE(RTX) \
1325 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1326 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1329 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1330 mode as a default when STRICT_ALIGNMENT, but not if not. */
1331 #define MEM_ALIGN(RTX) \
1332 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1333 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1334 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1336 /* For a REG rtx, the decl it is known to refer to, if it is known to
1337 refer to part of a DECL. */
1338 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1340 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1341 RTX that is always a CONST_INT. */
1342 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1344 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1345 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1346 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1347 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1348 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1349 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1350 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1351 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1352 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1354 /* 1 if RTX is a label_ref to a label outside the loop containing the
1356 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1357 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1359 /* 1 if RTX is a label_ref for a nonlocal label. */
1360 /* Likewise in an expr_list for a reg_label note. */
1361 #define LABEL_REF_NONLOCAL_P(RTX) \
1362 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1363 REG_LABEL)->volatil)
1365 /* 1 if RTX is a code_label that should always be considered to be needed. */
1366 #define LABEL_PRESERVE_P(RTX) \
1367 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1369 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1370 #define REG_LOOP_TEST_P(RTX) \
1371 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1373 /* During sched, 1 if RTX is an insn that must be scheduled together
1374 with the preceding insn. */
1375 #define SCHED_GROUP_P(RTX) \
1376 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1379 /* For a SET rtx, SET_DEST is the place that is set
1380 and SET_SRC is the value it is set to. */
1381 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1382 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1383 #define SET_IS_RETURN_P(RTX) \
1384 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1386 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1387 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1388 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1390 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1391 conditionally executing the code on, COND_EXEC_CODE is the code
1392 to execute if the condition is true. */
1393 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1394 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1396 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1398 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1399 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1401 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1402 tree constant pool. This information is private to varasm.c. */
1403 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1404 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1405 (RTX), SYMBOL_REF)->frame_related)
1407 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1408 #define SYMBOL_REF_FLAG(RTX) \
1409 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1411 /* 1 if RTX is a symbol_ref that has been the library function in
1412 emit_library_call. */
1413 #define SYMBOL_REF_USED(RTX) \
1414 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1416 /* 1 if RTX is a symbol_ref for a weak symbol. */
1417 #define SYMBOL_REF_WEAK(RTX) \
1418 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1420 /* The tree (decl or constant) associated with the symbol, or null. */
1421 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1423 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1424 information derivable from the tree decl associated with this symbol.
1425 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1426 decl. In some cases this is a bug. But beyond that, it's nice to cache
1427 this information to avoid recomputing it. Finally, this allows space for
1428 the target to store more than one bit of information, as with
1430 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1432 /* These flags are common enough to be defined for all targets. They
1433 are computed by the default version of targetm.encode_section_info. */
1435 /* Set if this symbol is a function. */
1436 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1437 #define SYMBOL_REF_FUNCTION_P(RTX) \
1438 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1439 /* Set if targetm.binds_local_p is true. */
1440 #define SYMBOL_FLAG_LOCAL (1 << 1)
1441 #define SYMBOL_REF_LOCAL_P(RTX) \
1442 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1443 /* Set if targetm.in_small_data_p is true. */
1444 #define SYMBOL_FLAG_SMALL (1 << 2)
1445 #define SYMBOL_REF_SMALL_P(RTX) \
1446 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1447 /* The three-bit field at [5:3] is true for TLS variables; use
1448 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1449 #define SYMBOL_FLAG_TLS_SHIFT 3
1450 #define SYMBOL_REF_TLS_MODEL(RTX) \
1451 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1452 /* Set if this symbol is not defined in this translation unit. */
1453 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1454 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1455 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1457 /* Subsequent bits are available for the target to use. */
1458 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1459 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1461 /* Define a macro to look for REG_INC notes,
1462 but save time on machines where they never exist. */
1464 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1465 #define FIND_REG_INC_NOTE(INSN, REG) \
1466 ((REG) != NULL_RTX && REG_P ((REG)) \
1467 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1468 : find_reg_note ((INSN), REG_INC, (REG)))
1470 #define FIND_REG_INC_NOTE(INSN, REG) 0
1473 /* Indicate whether the machine has any sort of auto increment addressing.
1474 If not, we can avoid checking for REG_INC notes. */
1476 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1477 #define AUTO_INC_DEC
1480 #ifndef HAVE_PRE_INCREMENT
1481 #define HAVE_PRE_INCREMENT 0
1484 #ifndef HAVE_PRE_DECREMENT
1485 #define HAVE_PRE_DECREMENT 0
1488 #ifndef HAVE_POST_INCREMENT
1489 #define HAVE_POST_INCREMENT 0
1492 #ifndef HAVE_POST_DECREMENT
1493 #define HAVE_POST_DECREMENT 0
1496 #ifndef HAVE_POST_MODIFY_DISP
1497 #define HAVE_POST_MODIFY_DISP 0
1500 #ifndef HAVE_POST_MODIFY_REG
1501 #define HAVE_POST_MODIFY_REG 0
1504 #ifndef HAVE_PRE_MODIFY_DISP
1505 #define HAVE_PRE_MODIFY_DISP 0
1508 #ifndef HAVE_PRE_MODIFY_REG
1509 #define HAVE_PRE_MODIFY_REG 0
1513 /* Some architectures do not have complete pre/post increment/decrement
1514 instruction sets, or only move some modes efficiently. These macros
1515 allow us to tune autoincrement generation. */
1517 #ifndef USE_LOAD_POST_INCREMENT
1518 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1521 #ifndef USE_LOAD_POST_DECREMENT
1522 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1525 #ifndef USE_LOAD_PRE_INCREMENT
1526 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1529 #ifndef USE_LOAD_PRE_DECREMENT
1530 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1533 #ifndef USE_STORE_POST_INCREMENT
1534 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1537 #ifndef USE_STORE_POST_DECREMENT
1538 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1541 #ifndef USE_STORE_PRE_INCREMENT
1542 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1545 #ifndef USE_STORE_PRE_DECREMENT
1546 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1549 /* Nonzero when we are generating CONCATs. */
1550 extern int generating_concat_p;
1552 /* Nonzero when we are expanding trees to RTL. */
1553 extern int currently_expanding_to_rtl;
1555 /* Generally useful functions. */
1558 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1561 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1562 extern void purge_builtin_constant_p (void);
1565 extern void set_stack_check_libfunc (rtx);
1566 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1567 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1568 extern void optimize_save_area_alloca (void);
1571 extern rtvec gen_rtvec (int, ...);
1572 extern rtx copy_insn_1 (rtx);
1573 extern rtx copy_insn (rtx);
1574 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1575 extern rtx emit_copy_of_insn_after (rtx, rtx);
1576 extern void set_reg_attrs_from_mem (rtx, rtx);
1577 extern void set_mem_attrs_from_reg (rtx, rtx);
1578 extern void set_reg_attrs_for_parm (rtx, rtx);
1579 extern void set_reg_pointer_align (rtx, unsigned int);
1580 extern int mem_expr_equal_p (tree, tree);
1583 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1584 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1586 extern rtvec rtvec_alloc (int);
1587 extern rtx copy_rtx (rtx);
1588 extern void dump_rtx_statistics (void);
1591 extern rtx copy_rtx_if_shared (rtx);
1594 extern rtx copy_most_rtx (rtx, rtx);
1595 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1596 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1597 extern int rtx_equal_p (rtx, rtx);
1600 extern rtvec gen_rtvec_v (int, rtx *);
1601 extern rtx gen_reg_rtx (enum machine_mode);
1602 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1603 extern rtx gen_label_rtx (void);
1604 extern int subreg_hard_regno (rtx, int);
1605 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1608 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1611 extern rtx gen_highpart (enum machine_mode, rtx);
1612 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1613 extern rtx gen_realpart (enum machine_mode, rtx);
1614 extern rtx gen_imagpart (enum machine_mode, rtx);
1615 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1618 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1619 extern int subreg_lowpart_p (rtx);
1620 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1622 extern unsigned int subreg_highpart_offset (enum machine_mode,
1624 extern rtx make_safe_from (rtx, rtx);
1625 extern rtx convert_memory_address (enum machine_mode, rtx);
1626 extern rtx get_insns (void);
1627 extern const char *get_insn_name (int);
1628 extern rtx get_last_insn (void);
1629 extern rtx get_last_insn_anywhere (void);
1630 extern rtx get_first_nonnote_insn (void);
1631 extern rtx get_last_nonnote_insn (void);
1632 extern void start_sequence (void);
1633 extern void push_to_sequence (rtx);
1634 extern void end_sequence (void);
1635 extern void push_to_full_sequence (rtx, rtx);
1636 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1640 extern rtx force_const_mem (enum machine_mode, rtx);
1645 extern rtx get_pool_constant (rtx);
1646 extern rtx get_pool_constant_mark (rtx, bool *);
1647 extern enum machine_mode get_pool_mode (rtx);
1648 extern rtx get_pool_constant_for_function (struct function *, rtx);
1649 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1650 extern int get_pool_offset (rtx);
1651 extern rtx simplify_subtraction (rtx);
1654 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1655 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1656 extern rtx assign_stack_temp_for_type (enum machine_mode,
1657 HOST_WIDE_INT, int, tree);
1658 extern rtx assign_temp (tree, int, int, int);
1661 extern rtx emit_insn_before (rtx, rtx);
1662 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1663 extern rtx emit_jump_insn_before (rtx, rtx);
1664 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1665 extern rtx emit_call_insn_before (rtx, rtx);
1666 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1667 extern rtx emit_barrier_before (rtx);
1668 extern rtx emit_label_before (rtx, rtx);
1669 extern rtx emit_note_before (int, rtx);
1670 extern rtx emit_insn_after (rtx, rtx);
1671 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1672 extern rtx emit_jump_insn_after (rtx, rtx);
1673 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1674 extern rtx emit_call_insn_after (rtx, rtx);
1675 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1676 extern rtx emit_barrier_after (rtx);
1677 extern rtx emit_label_after (rtx, rtx);
1678 extern rtx emit_note_after (int, rtx);
1679 extern rtx emit_note_copy_after (rtx, rtx);
1680 extern rtx emit_insn (rtx);
1681 extern rtx emit_jump_insn (rtx);
1682 extern rtx emit_call_insn (rtx);
1683 extern rtx emit_label (rtx);
1684 extern rtx emit_barrier (void);
1685 extern rtx emit_note (int);
1686 extern rtx emit_note_copy (rtx);
1687 extern rtx emit_line_note (location_t);
1688 extern rtx make_insn_raw (rtx);
1689 extern void add_function_usage_to (rtx, rtx);
1690 extern rtx last_call_insn (void);
1691 extern rtx previous_insn (rtx);
1692 extern rtx next_insn (rtx);
1693 extern rtx prev_nonnote_insn (rtx);
1694 extern rtx next_nonnote_insn (rtx);
1695 extern rtx prev_real_insn (rtx);
1696 extern rtx next_real_insn (rtx);
1697 extern rtx prev_active_insn (rtx);
1698 extern rtx next_active_insn (rtx);
1699 extern int active_insn_p (rtx);
1700 extern rtx prev_label (rtx);
1701 extern rtx next_label (rtx);
1702 extern rtx skip_consecutive_labels (rtx);
1703 extern rtx next_cc0_user (rtx);
1704 extern rtx prev_cc0_setter (rtx);
1706 #define emit_insn_before_sameloc(INSN, BEFORE) \
1707 emit_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1708 #define emit_jump_insn_before_sameloc(INSN, BEFORE) \
1709 emit_jump_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1710 #define emit_call_insn_before_sameloc(INSN, BEFORE) \
1711 emit_call_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1712 #define emit_insn_after_sameloc(INSN, AFTER) \
1713 emit_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1714 #define emit_jump_insn_after_sameloc(INSN, AFTER) \
1715 emit_jump_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1716 #define emit_call_insn_after_sameloc(INSN, AFTER) \
1717 emit_call_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1719 /* In cfglayout.c */
1720 extern tree choose_inner_scope (tree, tree);
1721 extern int insn_line (rtx);
1722 extern const char * insn_file (rtx);
1723 extern int locator_line (int);
1724 extern const char * locator_file (int);
1725 extern int prologue_locator, epilogue_locator;
1728 extern enum rtx_code reverse_condition (enum rtx_code);
1729 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1730 extern enum rtx_code swap_condition (enum rtx_code);
1731 extern enum rtx_code unsigned_condition (enum rtx_code);
1732 extern enum rtx_code signed_condition (enum rtx_code);
1733 extern void mark_jump_label (rtx, rtx, int);
1734 extern void cleanup_barriers (void);
1737 extern bool squeeze_notes (rtx *, rtx *);
1738 extern rtx delete_related_insns (rtx);
1739 extern void delete_jump (rtx);
1740 extern void delete_barrier (rtx);
1741 extern rtx get_label_before (rtx);
1742 extern rtx get_label_after (rtx);
1743 extern rtx follow_jumps (rtx);
1746 extern rtx *find_constant_term_loc (rtx *);
1749 extern rtx try_split (rtx, rtx, int);
1750 extern int split_branch_probability;
1752 /* In unknown file */
1753 extern rtx split_insns (rtx, rtx);
1755 /* In simplify-rtx.c */
1756 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1758 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1760 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1761 enum machine_mode, rtx, rtx, rtx);
1762 extern rtx simplify_const_relational_operation (enum rtx_code,
1763 enum machine_mode, rtx, rtx);
1764 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1765 enum machine_mode, rtx, rtx);
1766 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1767 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1769 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1770 enum machine_mode, rtx, rtx, rtx);
1771 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1772 enum machine_mode, rtx, rtx);
1773 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1775 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1777 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1778 extern rtx simplify_rtx (rtx);
1779 extern rtx avoid_constant_pool_reference (rtx);
1782 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1786 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1788 /* Functions in rtlanal.c */
1790 /* Single set is implemented as macro for performance reasons. */
1791 #define single_set(I) (INSN_P (I) \
1792 ? (GET_CODE (PATTERN (I)) == SET \
1793 ? PATTERN (I) : single_set_1 (I)) \
1795 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1797 /* Structure used for passing data to REPLACE_LABEL. */
1798 typedef struct replace_label_data
1802 bool update_label_nuses;
1803 } replace_label_data;
1805 extern int rtx_addr_can_trap_p (rtx);
1806 extern bool nonzero_address_p (rtx);
1807 extern int rtx_unstable_p (rtx);
1808 extern int rtx_varies_p (rtx, int);
1809 extern int rtx_addr_varies_p (rtx, int);
1810 extern HOST_WIDE_INT get_integer_term (rtx);
1811 extern rtx get_related_value (rtx);
1812 extern rtx get_jump_table_offset (rtx, rtx *);
1813 extern int global_reg_mentioned_p (rtx);
1814 extern int reg_mentioned_p (rtx, rtx);
1815 extern int count_occurrences (rtx, rtx, int);
1816 extern int reg_referenced_p (rtx, rtx);
1817 extern int reg_used_between_p (rtx, rtx, rtx);
1818 extern int reg_referenced_between_p (rtx, rtx, rtx);
1819 extern int reg_set_between_p (rtx, rtx, rtx);
1820 extern int regs_set_between_p (rtx, rtx, rtx);
1821 extern int commutative_operand_precedence (rtx);
1822 extern int swap_commutative_operands_p (rtx, rtx);
1823 extern int modified_between_p (rtx, rtx, rtx);
1824 extern int no_labels_between_p (rtx, rtx);
1825 extern int no_jumps_between_p (rtx, rtx);
1826 extern int modified_in_p (rtx, rtx);
1827 extern int insn_dependent_p (rtx, rtx);
1828 extern int reg_set_p (rtx, rtx);
1829 extern rtx single_set_2 (rtx, rtx);
1830 extern int multiple_sets (rtx);
1831 extern int set_noop_p (rtx);
1832 extern int noop_move_p (rtx);
1833 extern rtx find_last_value (rtx, rtx *, rtx, int);
1834 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1835 extern int reg_overlap_mentioned_p (rtx, rtx);
1836 extern rtx set_of (rtx, rtx);
1837 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1838 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1839 extern int dead_or_set_p (rtx, rtx);
1840 extern int dead_or_set_regno_p (rtx, unsigned int);
1841 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1842 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1843 extern rtx find_reg_equal_equiv_note (rtx);
1844 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1845 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1846 extern int pure_call_p (rtx);
1847 extern void remove_note (rtx, rtx);
1848 extern int side_effects_p (rtx);
1849 extern int volatile_refs_p (rtx);
1850 extern int volatile_insn_p (rtx);
1851 extern int may_trap_p (rtx);
1852 extern int inequality_comparisons_p (rtx);
1853 extern rtx replace_rtx (rtx, rtx, rtx);
1854 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1855 extern int replace_label (rtx *, void *);
1856 extern int rtx_referenced_p (rtx, rtx);
1857 extern bool tablejump_p (rtx, rtx *, rtx *);
1858 extern int computed_jump_p (rtx);
1859 typedef int (*rtx_function) (rtx *, void *);
1860 extern int for_each_rtx (rtx *, rtx_function, void *);
1861 extern rtx regno_use_in (unsigned int, rtx);
1862 extern int auto_inc_p (rtx);
1863 extern int in_expr_list_p (rtx, rtx);
1864 extern void remove_node_from_expr_list (rtx, rtx *);
1865 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1866 extern int loc_mentioned_in_p (rtx *, rtx);
1867 extern rtx find_first_parameter_load (rtx, rtx);
1868 extern bool keep_with_call_p (rtx);
1869 extern bool label_is_jump_target_p (rtx, rtx);
1870 extern int insn_rtx_cost (rtx);
1874 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1878 void free_EXPR_LIST_list (rtx *);
1879 void free_INSN_LIST_list (rtx *);
1880 void free_EXPR_LIST_node (rtx);
1881 void free_INSN_LIST_node (rtx);
1882 rtx alloc_INSN_LIST (rtx, rtx);
1883 rtx alloc_EXPR_LIST (int, rtx, rtx);
1887 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1888 Always at least 3, since the combiner could put that many together
1889 and we want this to remain correct for all the remaining passes. */
1891 extern int max_parallel;
1893 /* Free up register info memory. */
1894 extern void free_reg_info (void);
1897 extern int asm_noperands (rtx);
1898 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1899 enum machine_mode *);
1901 extern enum reg_class reg_preferred_class (int);
1902 extern enum reg_class reg_alternate_class (int);
1904 extern void split_all_insns (int);
1905 extern void split_all_insns_noflow (void);
1907 #define MAX_SAVED_CONST_INT 64
1908 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1910 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1911 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1912 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1913 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1914 extern GTY(()) rtx const_true_rtx;
1916 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1918 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1919 same as VOIDmode. */
1921 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1923 /* Likewise, for the constants 1 and 2. */
1925 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1926 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1928 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1929 is used to represent the frame pointer. This is because the
1930 hard frame pointer and the automatic variables are separated by an amount
1931 that cannot be determined until after register allocation. We can assume
1932 that in this case ELIMINABLE_REGS will be defined, one action of which
1933 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1934 #ifndef HARD_FRAME_POINTER_REGNUM
1935 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1938 /* Index labels for global_rtl. */
1939 enum global_rtl_index
1945 /* For register elimination to work properly these hard_frame_pointer_rtx,
1946 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1947 the same register. */
1948 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1949 GR_ARG_POINTER = GR_FRAME_POINTER,
1951 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1952 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1954 GR_HARD_FRAME_POINTER,
1956 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1957 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1958 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1963 GR_VIRTUAL_INCOMING_ARGS,
1964 GR_VIRTUAL_STACK_ARGS,
1965 GR_VIRTUAL_STACK_DYNAMIC,
1966 GR_VIRTUAL_OUTGOING_ARGS,
1972 /* Pointers to standard pieces of rtx are stored here. */
1973 extern GTY(()) rtx global_rtl[GR_MAX];
1975 /* Standard pieces of rtx, to be substituted directly into things. */
1976 #define pc_rtx (global_rtl[GR_PC])
1977 #define cc0_rtx (global_rtl[GR_CC0])
1979 /* All references to certain hard regs, except those created
1980 by allocating pseudo regs into them (when that's possible),
1981 go through these unique rtx objects. */
1982 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1983 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1984 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1985 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1987 extern GTY(()) rtx pic_offset_table_rtx;
1988 extern GTY(()) rtx static_chain_rtx;
1989 extern GTY(()) rtx static_chain_incoming_rtx;
1990 extern GTY(()) rtx return_address_pointer_rtx;
1992 /* Include the RTL generation functions. */
1994 #ifndef GENERATOR_FILE
1996 #ifndef USE_MAPPED_LOCATION
1997 #undef gen_rtx_ASM_OPERANDS
1998 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1999 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
2003 /* There are some RTL codes that require special attention; the
2004 generation functions included above do the raw handling. If you
2005 add to this list, modify special_rtx in gengenrtl.c as well. */
2007 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2008 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2009 extern rtx gen_raw_REG (enum machine_mode, int);
2010 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2011 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2012 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2014 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2016 /* Virtual registers are used during RTL generation to refer to locations into
2017 the stack frame when the actual location isn't known until RTL generation
2018 is complete. The routine instantiate_virtual_regs replaces these with
2019 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2022 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2024 /* This points to the first word of the incoming arguments passed on the stack,
2025 either by the caller or by the callee when pretending it was passed by the
2028 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2030 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2032 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2033 variable on the stack. Otherwise, it points to the first variable on
2036 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2038 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2040 /* This points to the location of dynamically-allocated memory on the stack
2041 immediately after the stack pointer has been adjusted by the amount
2044 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2046 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2048 /* This points to the location in the stack at which outgoing arguments should
2049 be written when the stack is pre-pushed (arguments pushed using push
2050 insns always use sp). */
2052 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2054 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2056 /* This points to the Canonical Frame Address of the function. This
2057 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2058 but is calculated relative to the arg pointer for simplicity; the
2059 frame pointer nor stack pointer are necessarily fixed relative to
2060 the CFA until after reload. */
2062 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2064 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2066 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2068 /* Nonzero if REGNUM is a pointer into the stack frame. */
2069 #define REGNO_PTR_FRAME_P(REGNUM) \
2070 ((REGNUM) == STACK_POINTER_REGNUM \
2071 || (REGNUM) == FRAME_POINTER_REGNUM \
2072 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2073 || (REGNUM) == ARG_POINTER_REGNUM \
2074 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2075 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2077 /* REGNUM never really appearing in the INSN stream. */
2078 #define INVALID_REGNUM (~(unsigned int) 0)
2080 extern rtx output_constant_def (tree, int);
2081 extern rtx lookup_constant_def (tree);
2083 /* Nonzero after the second flow pass has completed.
2084 Set to 1 or 0 by toplev.c */
2085 extern int flow2_completed;
2087 /* Nonzero after end of reload pass.
2088 Set to 1 or 0 by reload1.c. */
2090 extern int reload_completed;
2092 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2093 extern int epilogue_completed;
2095 /* Set to 1 while reload_as_needed is operating.
2096 Required by some machines to handle any generated moves differently. */
2098 extern int reload_in_progress;
2100 /* If this is nonzero, we do not bother generating VOLATILE
2101 around volatile memory references, and we are willing to
2102 output indirect addresses. If cse is to follow, we reject
2103 indirect addresses so a useful potential cse is generated;
2104 if it is used only once, instruction combination will produce
2105 the same indirect address eventually. */
2106 extern int cse_not_expected;
2108 /* Set to nonzero before life analysis to indicate that it is unsafe to
2109 generate any new pseudo registers. */
2110 extern int no_new_pseudos;
2112 /* Translates rtx code to tree code, for those codes needed by
2113 REAL_ARITHMETIC. The function returns an int because the caller may not
2114 know what `enum tree_code' means. */
2116 extern int rtx_to_tree_code (enum rtx_code);
2119 extern int delete_trivially_dead_insns (rtx, int);
2120 extern int cse_main (rtx, int, int, FILE *);
2121 extern void cse_condition_code_reg (void);
2122 extern int exp_equiv_p (rtx, rtx, int, bool);
2123 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
2126 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2127 extern int condjump_p (rtx);
2128 extern int any_condjump_p (rtx);
2129 extern int any_uncondjump_p (rtx);
2130 extern int safe_to_remove_jump_p (rtx);
2131 extern rtx pc_set (rtx);
2132 extern rtx condjump_label (rtx);
2133 extern int simplejump_p (rtx);
2134 extern int returnjump_p (rtx);
2135 extern int onlyjump_p (rtx);
2136 extern int only_sets_cc0_p (rtx);
2137 extern int sets_cc0_p (rtx);
2138 extern int invert_jump_1 (rtx, rtx);
2139 extern int invert_jump (rtx, rtx, int);
2140 extern int rtx_renumbered_equal_p (rtx, rtx);
2141 extern int true_regnum (rtx);
2142 extern unsigned int reg_or_subregno (rtx);
2143 extern int redirect_jump_1 (rtx, rtx);
2144 extern int redirect_jump (rtx, rtx, int);
2145 extern void rebuild_jump_labels (rtx);
2146 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2147 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2149 extern void delete_for_peephole (rtx, rtx);
2150 extern int condjump_in_parallel_p (rtx);
2151 extern void purge_line_number_notes (rtx);
2153 /* In emit-rtl.c. */
2154 extern int max_reg_num (void);
2155 extern int max_label_num (void);
2156 extern int get_first_label_num (void);
2157 extern void maybe_set_first_label_num (rtx);
2158 extern void delete_insns_since (rtx);
2159 extern void mark_reg_pointer (rtx, int);
2160 extern void mark_user_reg (rtx);
2161 extern void reset_used_flags (rtx);
2162 extern void set_used_flags (rtx);
2163 extern void reorder_insns (rtx, rtx, rtx);
2164 extern void reorder_insns_nobb (rtx, rtx, rtx);
2165 extern int get_max_uid (void);
2166 extern int in_sequence_p (void);
2167 extern void force_next_line_note (void);
2168 extern void init_emit (void);
2169 extern void init_emit_once (int);
2170 extern void push_topmost_sequence (void);
2171 extern void pop_topmost_sequence (void);
2172 extern void reverse_comparison (rtx);
2173 extern void set_new_first_and_last_insn (rtx, rtx);
2174 extern void set_new_last_label_num (int);
2175 extern void unshare_all_rtl (void);
2176 extern void unshare_all_rtl_again (rtx);
2177 extern void unshare_all_rtl_in_chain (rtx);
2178 extern void verify_rtl_sharing (void);
2179 extern void set_first_insn (rtx);
2180 extern void set_last_insn (rtx);
2181 extern void link_cc0_insns (rtx);
2182 extern void add_insn (rtx);
2183 extern void add_insn_before (rtx, rtx);
2184 extern void add_insn_after (rtx, rtx);
2185 extern void remove_insn (rtx);
2186 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
2187 extern enum rtx_code classify_insn (rtx);
2188 extern rtx emit (rtx);
2189 extern void renumber_insns (FILE *);
2190 extern void remove_unnecessary_notes (void);
2191 extern rtx delete_insn (rtx);
2192 extern rtx entry_of_function (void);
2193 extern void delete_insn_chain (rtx, rtx);
2194 extern rtx unlink_insn_chain (rtx, rtx);
2195 extern rtx delete_insn_and_edges (rtx);
2196 extern void delete_insn_chain_and_edges (rtx, rtx);
2197 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2200 extern int combine_instructions (rtx, unsigned int);
2201 extern unsigned int extended_count (rtx, enum machine_mode, int);
2202 extern rtx remove_death (unsigned int, rtx);
2203 extern void dump_combine_stats (FILE *);
2204 extern void dump_combine_total_stats (FILE *);
2206 extern void web_main (void);
2208 /* In sched-rgn.c. */
2209 extern void schedule_insns (FILE *);
2211 /* In sched-ebb.c. */
2212 extern void schedule_ebbs (FILE *);
2214 /* In haifa-sched.c. */
2215 extern void fix_sched_param (const char *, const char *);
2217 /* In print-rtl.c */
2218 extern const char *print_rtx_head;
2219 extern void debug_rtx (rtx);
2220 extern void debug_rtx_list (rtx, int);
2221 extern void debug_rtx_range (rtx, rtx);
2222 extern rtx debug_rtx_find (rtx, int);
2223 extern void print_mem_expr (FILE *, tree);
2224 extern void print_rtl (FILE *, rtx);
2225 extern void print_simple_rtl (FILE *, rtx);
2226 extern int print_rtl_single (FILE *, rtx);
2227 extern void print_inline_rtx (FILE *, rtx, int);
2230 extern void init_loop (void);
2231 extern void loop_optimize (rtx, FILE *, int);
2232 extern void branch_target_load_optimize (bool);
2235 extern void reposition_prologue_and_epilogue_notes (rtx);
2236 extern void thread_prologue_and_epilogue_insns (rtx);
2237 extern int prologue_epilogue_contains (rtx);
2238 extern int sibcall_epilogue_contains (rtx);
2239 extern void mark_temp_addr_taken (rtx);
2240 extern void update_temp_slot_address (rtx, rtx);
2243 extern void expand_null_return (void);
2244 extern void expand_naked_return (void);
2245 extern void emit_jump (rtx);
2248 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2252 extern void recompute_reg_usage (rtx, int);
2253 extern int initialize_uninitialized_subregs (void);
2254 extern void delete_dead_jumptables (void);
2255 extern void print_rtl_with_bb (FILE *, rtx);
2256 extern void dump_flow_info (FILE *);
2259 extern void init_expmed (void);
2260 extern void expand_inc (rtx, rtx);
2261 extern void expand_dec (rtx, rtx);
2262 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2263 unsigned HOST_WIDE_INT, rtx, int, int);
2266 extern bool can_copy_p (enum machine_mode);
2267 extern rtx fis_get_condition (rtx);
2268 extern int gcse_main (rtx, FILE *);
2269 extern int bypass_jumps (FILE *);
2271 /* In postreload-gcse.c */
2272 extern void gcse_after_reload_main (rtx);
2275 extern void mark_elimination (int, int);
2276 extern int global_alloc (FILE *);
2277 extern void dump_global_regs (FILE *);
2279 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2280 extern void retry_global_alloc (int, HARD_REG_SET);
2282 extern void build_insn_chain (rtx);
2285 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2286 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2287 extern void globalize_reg (int);
2288 extern void init_reg_modes_once (void);
2289 extern void init_regs (void);
2290 extern void init_fake_stack_mems (void);
2291 extern void init_reg_sets (void);
2292 extern void regset_release_memory (void);
2293 extern void regclass_init (void);
2294 extern void regclass (rtx, int, FILE *);
2295 extern void reg_scan (rtx, unsigned int, int);
2296 extern void reg_scan_update (rtx, rtx, unsigned int);
2297 extern void fix_register (const char *, int, int);
2299 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2300 enum machine_mode, unsigned int);
2302 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2306 extern void regmove_optimize (rtx, int, FILE *);
2307 extern void combine_stack_adjustments (void);
2310 extern void dbr_schedule (rtx, FILE *);
2312 /* In local-alloc.c */
2313 extern void dump_local_alloc (FILE *);
2314 extern int local_alloc (void);
2316 /* In reg-stack.c */
2317 extern bool reg_to_stack (FILE *);
2325 LCT_CONST_MAKE_BLOCK = 3,
2326 LCT_PURE_MAKE_BLOCK = 4,
2329 LCT_ALWAYS_RETURN = 7,
2330 LCT_RETURNS_TWICE = 8
2333 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2335 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2336 enum machine_mode, int, ...);
2339 extern int set_dominates_use (int, int, int, rtx, rtx);
2342 extern int in_data_section (void);
2343 extern void init_varasm_once (void);
2346 extern void init_rtl (void);
2347 extern void traverse_md_constants (int (*) (void **, void *), void *);
2348 struct md_constant { char *name, *value; };
2351 extern int read_skip_spaces (FILE *);
2352 extern rtx read_rtx (FILE *);
2353 extern const char *read_rtx_filename;
2354 extern int read_rtx_lineno;
2356 /* Redefine abort to report an internal error w/o coredump, and
2357 reporting the location of the error in the source file. This logic
2358 is duplicated in rtl.h and tree.h because every file that needs the
2359 special abort includes one or both. toplev.h gets too few files,
2360 system.h gets too many. */
2362 extern void fancy_abort (const char *, int, const char *)
2364 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2367 extern void clear_reg_alias_info (rtx);
2368 extern rtx canon_rtx (rtx);
2369 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2370 extern rtx get_addr (rtx);
2371 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2373 extern int read_dependence (rtx, rtx);
2374 extern int anti_dependence (rtx, rtx);
2375 extern int output_dependence (rtx, rtx);
2376 extern void mark_constant_function (void);
2377 extern void init_alias_once (void);
2378 extern void init_alias_analysis (void);
2379 extern void end_alias_analysis (void);
2380 extern rtx addr_side_effect_eval (rtx, int, int);
2381 extern bool memory_modified_in_insn_p (rtx, rtx);
2382 extern rtx find_base_term (rtx);
2383 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2384 extern rtx get_reg_known_value (unsigned int);
2385 extern bool get_reg_known_equiv_p (unsigned int);
2388 extern int stack_regs_mentioned (rtx insn);
2392 extern GTY(()) rtx stack_limit_rtx;
2394 /* In regrename.c */
2395 extern void regrename_optimize (void);
2396 extern void copyprop_hardreg_forward (void);
2399 extern void if_convert (int);
2402 extern void invert_br_probabilities (rtx);
2403 extern bool expensive_function_p (int);
2405 extern void tracer (unsigned int);
2407 /* In var-tracking.c */
2408 extern void variable_tracking_main (void);
2410 /* In stor-layout.c. */
2411 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2414 /* In loop-unswitch.c */
2415 extern rtx reversed_condition (rtx);
2416 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2419 extern rtx canon_condition (rtx);
2420 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2423 extern void reg_alloc (void);
2425 /* In modulo-sched.c. */
2426 extern void sms_schedule (FILE *);
2430 rtx (*gen_lowpart) (enum machine_mode, rtx);
2431 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2432 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2433 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2434 unsigned int, unsigned int *);
2436 /* Whenever you add entries here, make sure you adjust hosthooks-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 #endif /* ! GCC_RTL_H */
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