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Makefile.in (GTFILES): Remove stmt.c
[gcc.git] / gcc / rtl.h
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.
4
5 This file is part of GCC.
6
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
10 version.
11
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
15 for more details.
16
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
20 02111-1307, USA. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 #include "statistics.h"
26 #include "machmode.h"
27 #include "input.h"
28
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. */
33
34 /* Value used by some passes to "recognize" noop moves as valid
35 instructions. */
36 #define NOOP_MOVE_INSN_CODE INT_MAX
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
55
56 enum rtx_class {
57 /* We check bit 0-1 of some rtx class codes in the predicates below. */
58
59 /* Bit 0 = comparison if 0, arithmetic is 1
60 Bit 1 = 1 if commutative. */
61 RTX_COMPARE, /* 0 */
62 RTX_COMM_COMPARE,
63 RTX_BIN_ARITH,
64 RTX_COMM_ARITH,
65
66 /* Must follow the four preceding values. */
67 RTX_UNARY, /* 4 */
68
69 RTX_EXTRA,
70 RTX_MATCH,
71 RTX_INSN,
72
73 /* Bit 0 = 1 if constant. */
74 RTX_OBJ, /* 8 */
75 RTX_CONST_OBJ,
76
77 RTX_TERNARY,
78 RTX_BITFIELD_OPS,
79 RTX_AUTOINC
80 };
81
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)
95
96 extern const unsigned char rtx_length[NUM_RTX_CODE];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
98
99 extern const char * const rtx_name[NUM_RTX_CODE];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
101
102 extern const char * const rtx_format[NUM_RTX_CODE];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
104
105 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
107
108 extern const unsigned char rtx_size[NUM_RTX_CODE];
109 extern const unsigned char rtx_next[NUM_RTX_CODE];
110 \f
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. */
113 typedef struct
114 {
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align: 8;
117 /* Flags: */
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
124 after BASE. */
125 unsigned max_after_base: 1; /* maximum address target label is
126 after BASE. */
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
129 unsigned : 2;
130 unsigned scale : 8;
131 } addr_diff_vec_flags;
132
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(())
141 {
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. */
147 } mem_attrs;
148
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
151
152 typedef struct reg_attrs GTY(())
153 {
154 tree decl; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset; /* Offset from start of DECL. */
156 } reg_attrs;
157
158 /* Common union for an element of an rtx. */
159
160 union rtunion_def
161 {
162 int rt_int;
163 unsigned int rt_uint;
164 const char *rt_str;
165 rtx rt_rtx;
166 rtvec rt_rtvec;
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;
171 tree rt_tree;
172 struct basic_block_def *rt_bb;
173 mem_attrs *rt_mem;
174 reg_attrs *rt_reg;
175 };
176 typedef union rtunion_def rtunion;
177
178 /* RTL expression ("rtx"). */
179
180 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
181 chain_prev ("RTX_PREV (&%h)")))
182 {
183 /* The kind of expression this is. */
184 ENUM_BITFIELD(rtx_code) code: 16;
185
186 /* The kind of value the expression has. */
187 ENUM_BITFIELD(machine_mode) mode : 8;
188
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
202 constants pool.
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
220 promoted mode.
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
224 current loop.
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;
229 cleared before used.
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
232 before use. */
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;
252
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. */
256 union u {
257 rtunion fld[1];
258 HOST_WIDE_INT hwint[1];
259 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
260 };
261
262 /* The size in bytes of an rtx header (code, mode and flags). */
263 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
264
265 /* The size in bytes of an rtx with code CODE. */
266 #define RTX_SIZE(CODE) rtx_size[CODE]
267
268 #define NULL_RTX (rtx) 0
269
270 /* The "next" and "previous" RTX, relative to this one. */
271
272 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
273 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
274
275 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
276 */
277 #define RTX_PREV(X) ((INSN_P (X) \
278 || NOTE_P (X) \
279 || BARRIER_P (X) \
280 || LABEL_P (X)) \
281 && PREV_INSN (X) != NULL \
282 && NEXT_INSN (PREV_INSN (X)) == X \
283 ? PREV_INSN (X) : NULL)
284
285 /* Define macros to access the `code' field of the rtx. */
286
287 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
288 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
289
290 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
291 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
292
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. */
296
297 struct rtvec_def GTY(()) {
298 int num_elem; /* number of elements */
299 rtx GTY ((length ("%h.num_elem"))) elem[1];
300 };
301
302 #define NULL_RTVEC (rtvec) 0
303
304 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
305 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
306
307 /* Predicate yielding nonzero iff X is an rtx for a register. */
308 #define REG_P(X) (GET_CODE (X) == REG)
309
310 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
311 #define MEM_P(X) (GET_CODE (X) == MEM)
312
313 /* Predicate yielding nonzero iff X is a label insn. */
314 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
315
316 /* Predicate yielding nonzero iff X is a jump insn. */
317 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
318
319 /* Predicate yielding nonzero iff X is a call insn. */
320 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
321
322 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
323 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
324
325 /* Predicate yielding nonzero iff X is a real insn. */
326 #define INSN_P(X) \
327 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
328
329 /* Predicate yielding nonzero iff X is a note insn. */
330 #define NOTE_P(X) (GET_CODE (X) == NOTE)
331
332 /* Predicate yielding nonzero iff X is a barrier insn. */
333 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
334
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))
339
340 /* 1 if X is a unary operator. */
341
342 #define UNARY_P(X) \
343 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
344
345 /* 1 if X is a binary operator. */
346
347 #define BINARY_P(X) \
348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
349
350 /* 1 if X is an arithmetic operator. */
351
352 #define ARITHMETIC_P(X) \
353 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
354 == RTX_ARITHMETIC_RESULT)
355
356 /* 1 if X is an arithmetic operator. */
357
358 #define COMMUTATIVE_ARITH_P(X) \
359 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
360
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. */
364
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)))
369
370 /* 1 if X is a non-commutative operator. */
371
372 #define NON_COMMUTATIVE_P(X) \
373 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
374 == RTX_NON_COMMUTATIVE_RESULT)
375
376 /* 1 if X is a commutative operator on integers. */
377
378 #define COMMUTATIVE_P(X) \
379 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
380 == RTX_COMMUTATIVE_RESULT)
381
382 /* 1 if X is a relational operator. */
383
384 #define COMPARISON_P(X) \
385 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
386
387 /* 1 if X is a constant value that is an integer. */
388
389 #define CONSTANT_P(X) \
390 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
391 || GET_CODE (X) == CONST_VECTOR)
392
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)
396
397 /* General accessor macros for accessing the fields of an rtx. */
398
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__, \
407 __FUNCTION__); \
408 if (GET_RTX_FORMAT(_code)[_n] != C1) \
409 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
410 __FUNCTION__); \
411 &_rtx->u.fld[_n]; }))
412
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__, \
418 __FUNCTION__); \
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__, \
422 __FUNCTION__); \
423 &_rtx->u.fld[_n]; }))
424
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__, \
429 __FUNCTION__); \
430 &_rtx->u.fld[_n]; }))
431
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__, \
437 __FUNCTION__); \
438 &_rtx->u.fld[_n]; }))
439
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__, \
444 __FUNCTION__); \
445 &_rtvec->elem[_i]; }))
446
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__, \
452 __FUNCTION__); \
453 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
454 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
455 __FUNCTION__); \
456 &_rtx->u.hwint[_n]; }))
457
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__, \
462 __FUNCTION__); \
463 &_rtx->u.hwint[N]; }))
464
465 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
466 const char *)
467 ATTRIBUTE_NORETURN;
468 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
469 const char *)
470 ATTRIBUTE_NORETURN;
471 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
472 int, const char *)
473 ATTRIBUTE_NORETURN;
474 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
475 int, const char *)
476 ATTRIBUTE_NORETURN;
477 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
478 const char *, int, const char *)
479 ATTRIBUTE_NORETURN;
480 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
481 const char *)
482 ATTRIBUTE_NORETURN;
483
484 #else /* not ENABLE_RTL_CHECKING */
485
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])
493
494 #endif
495
496 /* General accessor macros for accessing the flags of an rtx. */
497
498 /* Access an individual rtx flag, with no checking of any kind. */
499 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
500
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__, \
506 __FUNCTION__); \
507 _rtx; })
508
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__, \
513 __FUNCTION__); \
514 _rtx; })
515
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__, \
521 __FUNCTION__); \
522 _rtx; })
523
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__, \
529 __FUNCTION__); \
530 _rtx; })
531
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__, \
538 __FUNCTION__); \
539 _rtx; })
540
541 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
542 __extension__ \
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__, \
548 __FUNCTION__); \
549 _rtx; })
550
551 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
552 __extension__ \
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__, \
559 __FUNCTION__); \
560 _rtx; })
561
562 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
563 __extension__ \
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__, \
570 __FUNCTION__); \
571 _rtx; })
572
573 extern void rtl_check_failed_flag (const char *, rtx, const char *,
574 int, const char *)
575 ATTRIBUTE_NORETURN
576 ;
577
578 #else /* not ENABLE_RTL_FLAG_CHECKING */
579
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)
588 #endif
589
590 #define CLEAR_RTX_FLAGS(RTX) \
591 do { \
592 rtx const _rtx = (RTX); \
593 _rtx->jump = 0; \
594 _rtx->call = 0; \
595 _rtx->unchanging = 0; \
596 _rtx->volatil = 0; \
597 _rtx->in_struct = 0; \
598 _rtx->used = 0; \
599 _rtx->frame_related = 0; \
600 _rtx->return_val = 0; \
601 } while (0)
602
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)
612
613 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
614 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
615
616 /* These are like XINT, etc. except that they expect a '0' field instead
617 of the normal type code. */
618
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)
632
633 /* Access a '0' field with any type. */
634 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
635
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)
647
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))
650
651 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
652 \f
653 /* ACCESS MACROS for particular fields of insns. */
654
655 /* Holds a unique number for each insn.
656 These are not necessarily sequentially increasing. */
657 #define INSN_UID(INSN) XINT (INSN, 0)
658
659 /* Chain insns together in sequence. */
660 #define PREV_INSN(INSN) XEXP (INSN, 1)
661 #define NEXT_INSN(INSN) XEXP (INSN, 2)
662
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)
667
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)
671
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)
678
679 #define RTX_UNCHANGING_P(RTX) \
680 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
681 #define RTX_FRAME_RELATED_P(RTX) \
682 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
683 JUMP_INSN, BARRIER, SET)->frame_related)
684
685 /* 1 if RTX is an insn that has been deleted. */
686 #define INSN_DELETED_P(RTX) \
687 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
688 CODE_LABEL, BARRIER, NOTE)->volatil)
689
690 /* 1 if RTX is a call to a const or pure function. */
691 #define CONST_OR_PURE_CALL_P(RTX) \
692 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
693 EXPR_LIST)->unchanging)
694
695 /* 1 if RTX is a call_insn for a sibling call. */
696 #define SIBLING_CALL_P(RTX) \
697 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
698
699 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
700 #define INSN_ANNULLED_BRANCH_P(RTX) \
701 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
702
703 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
704 elimination phase. */
705 #define INSN_DEAD_CODE_P(RTX) \
706 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
707
708 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
709 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
710 executed if the branch is taken. For annulled branches with this bit
711 clear, the insn should be executed only if the branch is not taken. */
712 #define INSN_FROM_TARGET_P(RTX) \
713 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
714
715 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
716
717 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
718
719 /* Holds a list of notes on what this insn does to various REGs.
720 It is a chain of EXPR_LIST rtx's, where the second operand is the
721 chain pointer and the first operand is the REG being described.
722 The mode field of the EXPR_LIST contains not a real machine mode
723 but a value from enum reg_note. */
724
725 #define REG_NOTES(INSN) XEXP(INSN, 8)
726
727 /* Don't forget to change reg_note_name in rtl.c. */
728 enum reg_note
729 {
730 /* The value in REG dies in this insn (i.e., it is not needed past
731 this insn). If REG is set in this insn, the REG_DEAD note may,
732 but need not, be omitted. */
733 REG_DEAD = 1,
734
735 /* The REG is autoincremented or autodecremented. */
736 REG_INC,
737
738 /* Describes the insn as a whole; it says that the insn sets a register
739 to a constant value or to be equivalent to a memory address. If the
740 register is spilled to the stack then the constant value should be
741 substituted for it. The contents of the REG_EQUIV is the constant
742 value or memory address, which may be different from the source of
743 the SET although it has the same value. A REG_EQUIV note may also
744 appear on an insn which copies a register parameter to a pseudo-register,
745 if there is a memory address which could be used to hold that
746 pseudo-register throughout the function. */
747 REG_EQUIV,
748
749 /* Like REG_EQUIV except that the destination is only momentarily equal
750 to the specified rtx. Therefore, it cannot be used for substitution;
751 but it can be used for cse. */
752 REG_EQUAL,
753
754 /* This insn copies the return-value of a library call out of the hard reg
755 for return values. This note is actually an INSN_LIST and it points to
756 the first insn involved in setting up arguments for the call. flow.c
757 uses this to delete the entire library call when its result is dead. */
758 REG_RETVAL,
759
760 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
761 and points at the one that has the REG_RETVAL. This note is also an
762 INSN_LIST. */
763 REG_LIBCALL,
764
765 /* The register is always nonnegative during the containing loop. This is
766 used in branches so that decrement and branch instructions terminating
767 on zero can be matched. There must be an insn pattern in the md file
768 named `decrement_and_branch_until_zero' or else this will never be added
769 to any instructions. */
770 REG_NONNEG,
771
772 /* There is no conflict *after this insn* between the register in the note
773 and the destination of this insn. */
774 REG_NO_CONFLICT,
775
776 /* Identifies a register set in this insn and never used. */
777 REG_UNUSED,
778
779 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
780 respectively. Normally, these are required to be consecutive insns, but
781 we permit putting a cc0-setting insn in the delay slot of a branch as
782 long as only one copy of the insn exists. In that case, these notes
783 point from one to the other to allow code generation to determine what
784 any require information and to properly update CC_STATUS. These notes
785 are INSN_LISTs. */
786 REG_CC_SETTER, REG_CC_USER,
787
788 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
789 CODE_LABEL contained in the REG_LABEL note is used by the insn.
790 This note is an INSN_LIST. */
791 REG_LABEL,
792
793 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
794 write-after-read and write-after-write dependencies respectively.
795 Data dependencies, which are the only type of LOG_LINK created by
796 flow, are represented by a 0 reg note kind. */
797 REG_DEP_ANTI, REG_DEP_OUTPUT,
798
799 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
800 It has an integer value. For jumps, it is the probability that this is a
801 taken branch. For calls, it is the probability that this call won't
802 return. */
803 REG_BR_PROB,
804
805 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn
806 before that the code to profile the value is inserted. It contains
807 the results of profiling. */
808 REG_VALUE_PROFILE,
809
810 /* Attached to a call insn; indicates that the call is malloc-like and
811 that the pointer returned cannot alias anything else. */
812 REG_NOALIAS,
813
814 /* Used to optimize rtl generated by dynamic stack allocations for targets
815 where SETJMP_VIA_SAVE_AREA is true. */
816 REG_SAVE_AREA,
817
818 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
819 CONCAT of two integer value. First specifies the branch predictor
820 that added the note, second specifies the predicted hitrate of branch
821 in the same format as REG_BR_PROB note uses. */
822 REG_BR_PRED,
823
824 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
825 for DWARF to interpret what they imply. The attached rtx is used
826 instead of intuition. */
827 REG_FRAME_RELATED_EXPR,
828
829 /* Indicates that REG holds the exception context for the function.
830 This context is shared by inline functions, so the code to acquire
831 the real exception context is delayed until after inlining. */
832 REG_EH_CONTEXT,
833
834 /* Indicates what exception region an INSN belongs in. This is used to
835 indicate what region to which a call may throw. REGION 0 indicates
836 that a call cannot throw at all. REGION -1 indicates that it cannot
837 throw, nor will it execute a non-local goto. */
838 REG_EH_REGION,
839
840 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
841 REG_SAVE_NOTE,
842
843 /* Indicates that this insn (which is part of the prologue) computes
844 a value which might not be used later, and if so it's OK to delete
845 the insn. Normally, deleting any insn in the prologue is an error.
846 At present the parameter is unused and set to (const_int 0). */
847 REG_MAYBE_DEAD,
848
849 /* Indicates that a call does not return. */
850 REG_NORETURN,
851
852 /* Indicates that an indirect jump is a non-local goto instead of a
853 computed goto. */
854 REG_NON_LOCAL_GOTO,
855
856 /* Indicates that a jump crosses between hot and cold sections
857 in a (partitioned) assembly or .o file, and therefore should not be
858 reduced to a simpler jump by optimizations. */
859 REG_CROSSING_JUMP,
860
861 /* This kind of note is generated at each to `setjmp',
862 and similar functions that can return twice. */
863 REG_SETJMP,
864
865 /* Indicate calls that always returns. */
866 REG_ALWAYS_RETURN
867 };
868
869 /* The base value for branch probability notes. */
870 #define REG_BR_PROB_BASE 10000
871
872 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
873 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
874 #define PUT_REG_NOTE_KIND(LINK, KIND) \
875 PUT_MODE (LINK, (enum machine_mode) (KIND))
876
877 /* Names for REG_NOTE's in EXPR_LIST insn's. */
878
879 extern const char * const reg_note_name[];
880 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
881
882 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
883 USE and CLOBBER expressions.
884 USE expressions list the registers filled with arguments that
885 are passed to the function.
886 CLOBBER expressions document the registers explicitly clobbered
887 by this CALL_INSN.
888 Pseudo registers can not be mentioned in this list. */
889 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
890
891 /* The label-number of a code-label. The assembler label
892 is made from `L' and the label-number printed in decimal.
893 Label numbers are unique in a compilation. */
894 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
895
896 #define LINE_NUMBER NOTE
897
898 /* In a NOTE that is a line number, this is a string for the file name that the
899 line is in. We use the same field to record block numbers temporarily in
900 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
901 between ints and pointers if we use a different macro for the block number.)
902 */
903
904 /* Opaque data. */
905 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
906 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
907 #ifdef USE_MAPPED_LOCATION
908 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
909 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
910 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
911 #define SET_INSN_DELETED(INSN) \
912 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
913 #else
914 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
915 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
916 (XLOC).line = NOTE_LINE_NUMBER (INSN))
917 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
918 #define SET_INSN_DELETED(INSN) \
919 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
920 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
921 #endif
922 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
923 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
924 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
925 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
926 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
927 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
928 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
929
930 /* In a NOTE that is a line number, this is the line number.
931 Other kinds of NOTEs are identified by negative numbers here. */
932 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
933
934 /* Nonzero if INSN is a note marking the beginning of a basic block. */
935 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
936 (GET_CODE (INSN) == NOTE \
937 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
938
939 /* Algorithm and flags for prediction. */
940 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
941 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
942 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
943
944 /* Variable declaration and the location of a variable. */
945 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
946 0, VAR_LOCATION))
947 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
948 1, VAR_LOCATION))
949
950 /* Codes that appear in the NOTE_LINE_NUMBER field
951 for kinds of notes that are not line numbers.
952
953 Notice that we do not try to use zero here for any of
954 the special note codes because sometimes the source line
955 actually can be zero! This happens (for example) when we
956 are generating code for the per-translation-unit constructor
957 and destructor routines for some C++ translation unit.
958
959 If you should change any of the following values, or if you
960 should add a new value here, don't forget to change the
961 note_insn_name array in rtl.c. */
962
963 enum insn_note
964 {
965 /* Keep all of these numbers negative. Adjust as needed. */
966 NOTE_INSN_BIAS = -100,
967
968 /* This note is used to get rid of an insn
969 when it isn't safe to patch the insn out of the chain. */
970 NOTE_INSN_DELETED,
971
972 /* These are used to mark the beginning and end of a lexical block.
973 See NOTE_BLOCK and reorder_blocks. */
974 NOTE_INSN_BLOCK_BEG,
975 NOTE_INSN_BLOCK_END,
976
977 /* These mark the extremes of a loop. */
978 NOTE_INSN_LOOP_BEG,
979 NOTE_INSN_LOOP_END,
980
981 /* Generated at the place in a loop that `continue' jumps to. */
982 NOTE_INSN_LOOP_CONT,
983 /* Generated at the start of a duplicated exit test. */
984 NOTE_INSN_LOOP_VTOP,
985
986 /* Mark that a block shouldn't be scheduled. This is currently
987 used in modulo scheduling. Modulo scheduling adds this note
988 to the blocks of the modulo-scheduled loops to disable scheduling
989 them in the later traditional scheduling passes. */
990 NOTE_DISABLE_SCHED_OF_BLOCK,
991
992 /* This kind of note is generated at the end of the function body,
993 just before the return insn or return label. In an optimizing
994 compilation it is deleted by the first jump optimization, after
995 enabling that optimizer to determine whether control can fall
996 off the end of the function body without a return statement. */
997 NOTE_INSN_FUNCTION_END,
998
999 /* This marks the point immediately after the last prologue insn. */
1000 NOTE_INSN_PROLOGUE_END,
1001
1002 /* This marks the point immediately prior to the first epilogue insn. */
1003 NOTE_INSN_EPILOGUE_BEG,
1004
1005 /* Generated in place of user-declared labels when they are deleted. */
1006 NOTE_INSN_DELETED_LABEL,
1007
1008 /* This note indicates the start of the real body of the function,
1009 i.e. the point just after all of the parms have been moved into
1010 their homes, etc. */
1011 NOTE_INSN_FUNCTION_BEG,
1012
1013 /* These note where exception handling regions begin and end.
1014 Uses NOTE_EH_HANDLER to identify the region in question. */
1015 NOTE_INSN_EH_REGION_BEG,
1016 NOTE_INSN_EH_REGION_END,
1017
1018 /* Generated whenever a duplicate line number note is output. For example,
1019 one is output after the end of an inline function, in order to prevent
1020 the line containing the inline call from being counted twice in gcov. */
1021 NOTE_INSN_REPEATED_LINE_NUMBER,
1022
1023 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
1024 NOTE_INSN_BASIC_BLOCK,
1025
1026 /* Record the expected value of a register at a location. Uses
1027 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
1028 NOTE_INSN_EXPECTED_VALUE,
1029
1030 /* Record that the current basic block is unlikely to be executed and
1031 should be moved to the UNLIKELY_EXECUTED_TEXT_SECTION. */
1032 NOTE_INSN_UNLIKELY_EXECUTED_CODE,
1033
1034 /* The location of a variable. */
1035 NOTE_INSN_VAR_LOCATION,
1036
1037 NOTE_INSN_MAX
1038 };
1039
1040 /* Names for NOTE insn's other than line numbers. */
1041
1042 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
1043 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1044 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
1045
1046 /* The name of a label, in case it corresponds to an explicit label
1047 in the input source code. */
1048 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1049
1050 /* In jump.c, each label contains a count of the number
1051 of LABEL_REFs that point at it, so unused labels can be deleted. */
1052 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
1053
1054 /* Labels carry a two-bit field composed of the ->jump and ->call
1055 bits. This field indicates whether the label is an alternate
1056 entry point, and if so, what kind. */
1057 enum label_kind
1058 {
1059 LABEL_NORMAL = 0, /* ordinary label */
1060 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1061 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1062 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1063 };
1064
1065 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1066
1067 /* Retrieve the kind of LABEL. */
1068 #define LABEL_KIND(LABEL) __extension__ \
1069 ({ rtx const _label = (LABEL); \
1070 if (GET_CODE (_label) != CODE_LABEL) \
1071 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1072 __FUNCTION__); \
1073 (enum label_kind) ((_label->jump << 1) | _label->call); })
1074
1075 /* Set the kind of LABEL. */
1076 #define SET_LABEL_KIND(LABEL, KIND) do { \
1077 rtx _label = (LABEL); \
1078 unsigned int _kind = (KIND); \
1079 if (GET_CODE (_label) != CODE_LABEL) \
1080 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1081 __FUNCTION__); \
1082 _label->jump = ((_kind >> 1) & 1); \
1083 _label->call = (_kind & 1); \
1084 } while (0)
1085
1086 #else
1087
1088 /* Retrieve the kind of LABEL. */
1089 #define LABEL_KIND(LABEL) \
1090 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1091
1092 /* Set the kind of LABEL. */
1093 #define SET_LABEL_KIND(LABEL, KIND) do { \
1094 rtx _label = (LABEL); \
1095 unsigned int _kind = (KIND); \
1096 _label->jump = ((_kind >> 1) & 1); \
1097 _label->call = (_kind & 1); \
1098 } while (0)
1099
1100 #endif /* rtl flag checking */
1101
1102 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1103
1104 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1105 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1106 be decremented and possibly the label can be deleted. */
1107 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
1108
1109 /* Once basic blocks are found in flow.c,
1110 each CODE_LABEL starts a chain that goes through
1111 all the LABEL_REFs that jump to that label.
1112 The chain eventually winds up at the CODE_LABEL: it is circular. */
1113 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1114 \f
1115 /* This is the field in the LABEL_REF through which the circular chain
1116 of references to a particular label is linked.
1117 This chain is set up in flow.c. */
1118
1119 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
1120
1121 /* Once basic blocks are found in flow.c,
1122 Each LABEL_REF points to its containing instruction with this field. */
1123
1124 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
1125
1126 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
1127 the number the register originally had; for a pseudo register turned into
1128 a hard reg this will hold the old pseudo register number. */
1129
1130 #define REGNO(RTX) XCUINT (RTX, 0, REG)
1131 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1132
1133 /* 1 if RTX is a reg or parallel that is the current function's return
1134 value. */
1135 #define REG_FUNCTION_VALUE_P(RTX) \
1136 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1137
1138 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1139 #define REG_USERVAR_P(RTX) \
1140 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1141
1142 /* 1 if RTX is a reg that holds a pointer value. */
1143 #define REG_POINTER(RTX) \
1144 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1145
1146 /* 1 if RTX is a mem that holds a pointer value. */
1147 #define MEM_POINTER(RTX) \
1148 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1149
1150 /* 1 if the given register REG corresponds to a hard register. */
1151 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1152
1153 /* 1 if the given register number REG_NO corresponds to a hard register. */
1154 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1155
1156 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1157
1158 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1159
1160 /* For a CONST_DOUBLE:
1161 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1162 low-order word and ..._HIGH the high-order.
1163 For a float, there is a REAL_VALUE_TYPE structure, and
1164 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1165 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1166 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1167 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1168
1169 /* For a CONST_VECTOR, return element #n. */
1170 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1171
1172 /* For a CONST_VECTOR, return the number of elements in a vector. */
1173 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1174
1175 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1176 SUBREG_BYTE extracts the byte-number. */
1177
1178 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1179 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1180
1181 /* in rtlanal.c */
1182 /* Return the right cost to give to an operation
1183 to make the cost of the corresponding register-to-register instruction
1184 N times that of a fast register-to-register instruction. */
1185 #define COSTS_N_INSNS(N) ((N) * 4)
1186
1187 /* Maximum cost of an rtl expression. This value has the special meaning
1188 not to use an rtx with this cost under any circumstances. */
1189 #define MAX_COST INT_MAX
1190
1191 extern int rtx_cost (rtx, enum rtx_code);
1192 extern int address_cost (rtx, enum machine_mode);
1193 extern unsigned int subreg_lsb (rtx);
1194 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1195 unsigned int);
1196 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1197 unsigned int, enum machine_mode);
1198 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1199 unsigned int, enum machine_mode);
1200 extern unsigned int subreg_regno (rtx);
1201 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1202 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1203
1204
1205 /* 1 if RTX is a subreg containing a reg that is already known to be
1206 sign- or zero-extended from the mode of the subreg to the mode of
1207 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1208 extension.
1209
1210 When used as a LHS, is means that this extension must be done
1211 when assigning to SUBREG_REG. */
1212
1213 #define SUBREG_PROMOTED_VAR_P(RTX) \
1214 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1215
1216 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1217 do { \
1218 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1219 if ((VAL) < 0) \
1220 _rtx->volatil = 1; \
1221 else { \
1222 _rtx->volatil = 0; \
1223 _rtx->unchanging = (VAL); \
1224 } \
1225 } while (0)
1226 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1227 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1228 ? -1 : (RTX)->unchanging)
1229
1230 /* Access various components of an ASM_OPERANDS rtx. */
1231
1232 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1233 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1234 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1235 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1236 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1237 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1238 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1239 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1240 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1241 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1242 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1243 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1244 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1245 #ifdef USE_MAPPED_LOCATION
1246 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1247 #else
1248 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1249 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1250 #endif
1251
1252 /* 1 if RTX is a mem and we should keep the alias set for this mem
1253 unchanged when we access a component. Set to 1, or example, when we
1254 are already in a non-addressable component of an aggregate. */
1255 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1256 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1257
1258 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1259 #define MEM_VOLATILE_P(RTX) \
1260 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1261 ASM_INPUT)->volatil)
1262
1263 /* 1 if RTX is a mem that refers to an aggregate, either to the
1264 aggregate itself of to a field of the aggregate. If zero, RTX may
1265 or may not be such a reference. */
1266 #define MEM_IN_STRUCT_P(RTX) \
1267 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1268
1269 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1270 not refer to a scalar. */
1271 #define MEM_SCALAR_P(RTX) \
1272 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1273
1274 /* 1 if RTX is a mem that cannot trap. */
1275 #define MEM_NOTRAP_P(RTX) \
1276 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1277
1278 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1279 RTX. Otherwise, vice versa. Use this macro only when you are
1280 *sure* that you know that the MEM is in a structure, or is a
1281 scalar. VAL is evaluated only once. */
1282 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1283 do { \
1284 if (VAL) \
1285 { \
1286 MEM_IN_STRUCT_P (RTX) = 1; \
1287 MEM_SCALAR_P (RTX) = 0; \
1288 } \
1289 else \
1290 { \
1291 MEM_IN_STRUCT_P (RTX) = 0; \
1292 MEM_SCALAR_P (RTX) = 1; \
1293 } \
1294 } while (0)
1295
1296 /* The memory attribute block. We provide access macros for each value
1297 in the block and provide defaults if none specified. */
1298 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1299
1300 /* The register attribute block. We provide access macros for each value
1301 in the block and provide defaults if none specified. */
1302 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1303
1304 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1305 set, and may alias anything. Otherwise, the MEM can only alias
1306 MEMs in a conflicting alias set. This value is set in a
1307 language-dependent manner in the front-end, and should not be
1308 altered in the back-end. These set numbers are tested with
1309 alias_sets_conflict_p. */
1310 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1311
1312 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1313 refer to part of a DECL. It may also be a COMPONENT_REF. */
1314 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1315
1316 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1317 RTX that is always a CONST_INT. */
1318 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1319
1320 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1321 is always a CONST_INT. */
1322 #define MEM_SIZE(RTX) \
1323 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1324 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1325 : 0)
1326
1327 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1328 mode as a default when STRICT_ALIGNMENT, but not if not. */
1329 #define MEM_ALIGN(RTX) \
1330 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1331 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1332 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1333
1334 /* For a REG rtx, the decl it is known to refer to, if it is known to
1335 refer to part of a DECL. */
1336 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1337
1338 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1339 RTX that is always a CONST_INT. */
1340 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1341
1342 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1343 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1344 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1345 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1346 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1347 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1348 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1349 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1350 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1351
1352 /* 1 if RTX is a label_ref to a label outside the loop containing the
1353 reference. */
1354 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1355 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1356
1357 /* 1 if RTX is a label_ref for a nonlocal label. */
1358 /* Likewise in an expr_list for a reg_label note. */
1359 #define LABEL_REF_NONLOCAL_P(RTX) \
1360 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1361 REG_LABEL)->volatil)
1362
1363 /* 1 if RTX is a code_label that should always be considered to be needed. */
1364 #define LABEL_PRESERVE_P(RTX) \
1365 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1366
1367 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1368 #define REG_LOOP_TEST_P(RTX) \
1369 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1370
1371 /* During sched, 1 if RTX is an insn that must be scheduled together
1372 with the preceding insn. */
1373 #define SCHED_GROUP_P(RTX) \
1374 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1375 )->in_struct)
1376
1377 /* For a SET rtx, SET_DEST is the place that is set
1378 and SET_SRC is the value it is set to. */
1379 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1380 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1381 #define SET_IS_RETURN_P(RTX) \
1382 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1383
1384 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1385 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1386 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1387
1388 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1389 conditionally executing the code on, COND_EXEC_CODE is the code
1390 to execute if the condition is true. */
1391 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1392 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1393
1394 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1395 constants pool. */
1396 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1397 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1398
1399 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1400 tree constant pool. This information is private to varasm.c. */
1401 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1402 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1403 (RTX), SYMBOL_REF)->frame_related)
1404
1405 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1406 #define SYMBOL_REF_FLAG(RTX) \
1407 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1408
1409 /* 1 if RTX is a symbol_ref that has been the library function in
1410 emit_library_call. */
1411 #define SYMBOL_REF_USED(RTX) \
1412 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1413
1414 /* 1 if RTX is a symbol_ref for a weak symbol. */
1415 #define SYMBOL_REF_WEAK(RTX) \
1416 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1417
1418 /* The tree (decl or constant) associated with the symbol, or null. */
1419 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1420
1421 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1422 information derivable from the tree decl associated with this symbol.
1423 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1424 decl. In some cases this is a bug. But beyond that, it's nice to cache
1425 this information to avoid recomputing it. Finally, this allows space for
1426 the target to store more than one bit of information, as with
1427 SYMBOL_REF_FLAG. */
1428 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1429
1430 /* These flags are common enough to be defined for all targets. They
1431 are computed by the default version of targetm.encode_section_info. */
1432
1433 /* Set if this symbol is a function. */
1434 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1435 #define SYMBOL_REF_FUNCTION_P(RTX) \
1436 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1437 /* Set if targetm.binds_local_p is true. */
1438 #define SYMBOL_FLAG_LOCAL (1 << 1)
1439 #define SYMBOL_REF_LOCAL_P(RTX) \
1440 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1441 /* Set if targetm.in_small_data_p is true. */
1442 #define SYMBOL_FLAG_SMALL (1 << 2)
1443 #define SYMBOL_REF_SMALL_P(RTX) \
1444 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1445 /* The three-bit field at [5:3] is true for TLS variables; use
1446 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1447 #define SYMBOL_FLAG_TLS_SHIFT 3
1448 #define SYMBOL_REF_TLS_MODEL(RTX) \
1449 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1450 /* Set if this symbol is not defined in this translation unit. */
1451 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1452 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1453 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1454
1455 /* Subsequent bits are available for the target to use. */
1456 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1457 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1458
1459 /* Define a macro to look for REG_INC notes,
1460 but save time on machines where they never exist. */
1461
1462 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1463 #define FIND_REG_INC_NOTE(INSN, REG) \
1464 ((REG) != NULL_RTX && REG_P ((REG)) \
1465 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1466 : find_reg_note ((INSN), REG_INC, (REG)))
1467 #else
1468 #define FIND_REG_INC_NOTE(INSN, REG) 0
1469 #endif
1470
1471 /* Indicate whether the machine has any sort of auto increment addressing.
1472 If not, we can avoid checking for REG_INC notes. */
1473
1474 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1475 #define AUTO_INC_DEC
1476 #endif
1477
1478 #ifndef HAVE_PRE_INCREMENT
1479 #define HAVE_PRE_INCREMENT 0
1480 #endif
1481
1482 #ifndef HAVE_PRE_DECREMENT
1483 #define HAVE_PRE_DECREMENT 0
1484 #endif
1485
1486 #ifndef HAVE_POST_INCREMENT
1487 #define HAVE_POST_INCREMENT 0
1488 #endif
1489
1490 #ifndef HAVE_POST_DECREMENT
1491 #define HAVE_POST_DECREMENT 0
1492 #endif
1493
1494 #ifndef HAVE_POST_MODIFY_DISP
1495 #define HAVE_POST_MODIFY_DISP 0
1496 #endif
1497
1498 #ifndef HAVE_POST_MODIFY_REG
1499 #define HAVE_POST_MODIFY_REG 0
1500 #endif
1501
1502 #ifndef HAVE_PRE_MODIFY_DISP
1503 #define HAVE_PRE_MODIFY_DISP 0
1504 #endif
1505
1506 #ifndef HAVE_PRE_MODIFY_REG
1507 #define HAVE_PRE_MODIFY_REG 0
1508 #endif
1509
1510
1511 /* Some architectures do not have complete pre/post increment/decrement
1512 instruction sets, or only move some modes efficiently. These macros
1513 allow us to tune autoincrement generation. */
1514
1515 #ifndef USE_LOAD_POST_INCREMENT
1516 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1517 #endif
1518
1519 #ifndef USE_LOAD_POST_DECREMENT
1520 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1521 #endif
1522
1523 #ifndef USE_LOAD_PRE_INCREMENT
1524 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1525 #endif
1526
1527 #ifndef USE_LOAD_PRE_DECREMENT
1528 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1529 #endif
1530
1531 #ifndef USE_STORE_POST_INCREMENT
1532 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1533 #endif
1534
1535 #ifndef USE_STORE_POST_DECREMENT
1536 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1537 #endif
1538
1539 #ifndef USE_STORE_PRE_INCREMENT
1540 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1541 #endif
1542
1543 #ifndef USE_STORE_PRE_DECREMENT
1544 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1545 #endif
1546 \f
1547 /* Nonzero when we are generating CONCATs. */
1548 extern int generating_concat_p;
1549
1550 /* Nonzero when we are expanding trees to RTL. */
1551 extern int currently_expanding_to_rtl;
1552
1553 /* Generally useful functions. */
1554
1555 /* In expmed.c */
1556 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1557
1558 /* In builtins.c */
1559 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1560 extern void purge_builtin_constant_p (void);
1561
1562 /* In explow.c */
1563 extern void set_stack_check_libfunc (rtx);
1564 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1565 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1566 extern void optimize_save_area_alloca (void);
1567
1568 /* In emit-rtl.c */
1569 extern rtvec gen_rtvec (int, ...);
1570 extern rtx copy_insn_1 (rtx);
1571 extern rtx copy_insn (rtx);
1572 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1573 extern rtx emit_copy_of_insn_after (rtx, rtx);
1574 extern void set_reg_attrs_from_mem (rtx, rtx);
1575 extern void set_mem_attrs_from_reg (rtx, rtx);
1576 extern void set_reg_attrs_for_parm (rtx, rtx);
1577 extern void set_reg_pointer_align (rtx, unsigned int);
1578 extern int mem_expr_equal_p (tree, tree);
1579
1580 /* In rtl.c */
1581 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1582 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1583
1584 extern rtvec rtvec_alloc (int);
1585 extern rtx copy_rtx (rtx);
1586 extern void dump_rtx_statistics (void);
1587
1588 /* In emit-rtl.c */
1589 extern rtx copy_rtx_if_shared (rtx);
1590
1591 /* In rtl.c */
1592 extern rtx copy_most_rtx (rtx, rtx);
1593 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1594 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1595 extern int rtx_equal_p (rtx, rtx);
1596
1597 /* In emit-rtl.c */
1598 extern rtvec gen_rtvec_v (int, rtx *);
1599 extern rtx gen_reg_rtx (enum machine_mode);
1600 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1601 extern rtx gen_label_rtx (void);
1602 extern int subreg_hard_regno (rtx, int);
1603 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1604
1605 /* In cse.c */
1606 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1607
1608 /* In emit-rtl.c */
1609 extern rtx gen_highpart (enum machine_mode, rtx);
1610 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1611 extern rtx gen_realpart (enum machine_mode, rtx);
1612 extern rtx gen_imagpart (enum machine_mode, rtx);
1613 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1614
1615 /* In emit-rtl.c */
1616 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1617 extern int subreg_lowpart_p (rtx);
1618 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1619 enum machine_mode);
1620 extern unsigned int subreg_highpart_offset (enum machine_mode,
1621 enum machine_mode);
1622 extern rtx make_safe_from (rtx, rtx);
1623 extern rtx convert_memory_address (enum machine_mode, rtx);
1624 extern rtx get_insns (void);
1625 extern const char *get_insn_name (int);
1626 extern rtx get_last_insn (void);
1627 extern rtx get_last_insn_anywhere (void);
1628 extern rtx get_first_nonnote_insn (void);
1629 extern rtx get_last_nonnote_insn (void);
1630 extern void start_sequence (void);
1631 extern void push_to_sequence (rtx);
1632 extern void end_sequence (void);
1633 extern void push_to_full_sequence (rtx, rtx);
1634 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1635 enum machine_mode);
1636
1637 /* In varasm.c */
1638 extern rtx force_const_mem (enum machine_mode, rtx);
1639
1640 /* In varasm.c */
1641
1642 struct function;
1643 extern rtx get_pool_constant (rtx);
1644 extern rtx get_pool_constant_mark (rtx, bool *);
1645 extern enum machine_mode get_pool_mode (rtx);
1646 extern rtx get_pool_constant_for_function (struct function *, rtx);
1647 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1648 extern int get_pool_offset (rtx);
1649 extern rtx simplify_subtraction (rtx);
1650
1651 /* In function.c */
1652 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1653 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1654 extern rtx assign_stack_temp_for_type (enum machine_mode,
1655 HOST_WIDE_INT, int, tree);
1656 extern rtx assign_temp (tree, int, int, int);
1657
1658 /* In emit-rtl.c */
1659 extern rtx emit_insn_before (rtx, rtx);
1660 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1661 extern rtx emit_jump_insn_before (rtx, rtx);
1662 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1663 extern rtx emit_call_insn_before (rtx, rtx);
1664 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1665 extern rtx emit_barrier_before (rtx);
1666 extern rtx emit_label_before (rtx, rtx);
1667 extern rtx emit_note_before (int, rtx);
1668 extern rtx emit_insn_after (rtx, rtx);
1669 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1670 extern rtx emit_jump_insn_after (rtx, rtx);
1671 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1672 extern rtx emit_call_insn_after (rtx, rtx);
1673 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1674 extern rtx emit_barrier_after (rtx);
1675 extern rtx emit_label_after (rtx, rtx);
1676 extern rtx emit_note_after (int, rtx);
1677 extern rtx emit_note_copy_after (rtx, rtx);
1678 extern rtx emit_insn (rtx);
1679 extern rtx emit_jump_insn (rtx);
1680 extern rtx emit_call_insn (rtx);
1681 extern rtx emit_label (rtx);
1682 extern rtx emit_barrier (void);
1683 extern rtx emit_note (int);
1684 extern rtx emit_note_copy (rtx);
1685 extern rtx emit_line_note (location_t);
1686 extern rtx make_insn_raw (rtx);
1687 extern void add_function_usage_to (rtx, rtx);
1688 extern rtx last_call_insn (void);
1689 extern rtx previous_insn (rtx);
1690 extern rtx next_insn (rtx);
1691 extern rtx prev_nonnote_insn (rtx);
1692 extern rtx next_nonnote_insn (rtx);
1693 extern rtx prev_real_insn (rtx);
1694 extern rtx next_real_insn (rtx);
1695 extern rtx prev_active_insn (rtx);
1696 extern rtx next_active_insn (rtx);
1697 extern int active_insn_p (rtx);
1698 extern rtx prev_label (rtx);
1699 extern rtx next_label (rtx);
1700 extern rtx skip_consecutive_labels (rtx);
1701 extern rtx next_cc0_user (rtx);
1702 extern rtx prev_cc0_setter (rtx);
1703
1704 #define emit_insn_before_sameloc(INSN, BEFORE) \
1705 emit_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1706 #define emit_jump_insn_before_sameloc(INSN, BEFORE) \
1707 emit_jump_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1708 #define emit_call_insn_before_sameloc(INSN, BEFORE) \
1709 emit_call_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1710 #define emit_insn_after_sameloc(INSN, AFTER) \
1711 emit_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1712 #define emit_jump_insn_after_sameloc(INSN, AFTER) \
1713 emit_jump_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1714 #define emit_call_insn_after_sameloc(INSN, AFTER) \
1715 emit_call_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1716
1717 /* In cfglayout.c */
1718 extern tree choose_inner_scope (tree, tree);
1719 extern int insn_line (rtx);
1720 extern const char * insn_file (rtx);
1721 extern int locator_line (int);
1722 extern const char * locator_file (int);
1723 extern int prologue_locator, epilogue_locator;
1724
1725 /* In jump.c */
1726 extern enum rtx_code reverse_condition (enum rtx_code);
1727 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1728 extern enum rtx_code swap_condition (enum rtx_code);
1729 extern enum rtx_code unsigned_condition (enum rtx_code);
1730 extern enum rtx_code signed_condition (enum rtx_code);
1731 extern void mark_jump_label (rtx, rtx, int);
1732 extern void cleanup_barriers (void);
1733
1734 /* In jump.c */
1735 extern bool squeeze_notes (rtx *, rtx *);
1736 extern rtx delete_related_insns (rtx);
1737 extern void delete_jump (rtx);
1738 extern void delete_barrier (rtx);
1739 extern rtx get_label_before (rtx);
1740 extern rtx get_label_after (rtx);
1741 extern rtx follow_jumps (rtx);
1742
1743 /* In recog.c */
1744 extern rtx *find_constant_term_loc (rtx *);
1745
1746 /* In emit-rtl.c */
1747 extern rtx try_split (rtx, rtx, int);
1748 extern int split_branch_probability;
1749
1750 /* In unknown file */
1751 extern rtx split_insns (rtx, rtx);
1752
1753 /* In simplify-rtx.c */
1754 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1755 enum machine_mode);
1756 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1757 rtx);
1758 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1759 enum machine_mode, rtx, rtx, rtx);
1760 extern rtx simplify_const_relational_operation (enum rtx_code,
1761 enum machine_mode, rtx, rtx);
1762 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1763 enum machine_mode, rtx, rtx);
1764 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1765 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1766 enum machine_mode);
1767 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1768 enum machine_mode, rtx, rtx, rtx);
1769 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1770 enum machine_mode, rtx, rtx);
1771 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1772 unsigned int);
1773 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1774 unsigned int);
1775 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1776 extern rtx simplify_rtx (rtx);
1777 extern rtx avoid_constant_pool_reference (rtx);
1778
1779 /* In regclass.c */
1780 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1781 bool);
1782
1783 /* In emit-rtl.c */
1784 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1785
1786 /* Functions in rtlanal.c */
1787
1788 /* Single set is implemented as macro for performance reasons. */
1789 #define single_set(I) (INSN_P (I) \
1790 ? (GET_CODE (PATTERN (I)) == SET \
1791 ? PATTERN (I) : single_set_1 (I)) \
1792 : NULL_RTX)
1793 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1794
1795 /* Structure used for passing data to REPLACE_LABEL. */
1796 typedef struct replace_label_data
1797 {
1798 rtx r1;
1799 rtx r2;
1800 bool update_label_nuses;
1801 } replace_label_data;
1802
1803 extern int rtx_addr_can_trap_p (rtx);
1804 extern bool nonzero_address_p (rtx);
1805 extern int rtx_unstable_p (rtx);
1806 extern int rtx_varies_p (rtx, int);
1807 extern int rtx_addr_varies_p (rtx, int);
1808 extern HOST_WIDE_INT get_integer_term (rtx);
1809 extern rtx get_related_value (rtx);
1810 extern rtx get_jump_table_offset (rtx, rtx *);
1811 extern int global_reg_mentioned_p (rtx);
1812 extern int reg_mentioned_p (rtx, rtx);
1813 extern int count_occurrences (rtx, rtx, int);
1814 extern int reg_referenced_p (rtx, rtx);
1815 extern int reg_used_between_p (rtx, rtx, rtx);
1816 extern int reg_referenced_between_p (rtx, rtx, rtx);
1817 extern int reg_set_between_p (rtx, rtx, rtx);
1818 extern int regs_set_between_p (rtx, rtx, rtx);
1819 extern int commutative_operand_precedence (rtx);
1820 extern int swap_commutative_operands_p (rtx, rtx);
1821 extern int modified_between_p (rtx, rtx, rtx);
1822 extern int no_labels_between_p (rtx, rtx);
1823 extern int no_jumps_between_p (rtx, rtx);
1824 extern int modified_in_p (rtx, rtx);
1825 extern int insn_dependent_p (rtx, rtx);
1826 extern int reg_set_p (rtx, rtx);
1827 extern rtx single_set_2 (rtx, rtx);
1828 extern int multiple_sets (rtx);
1829 extern int set_noop_p (rtx);
1830 extern int noop_move_p (rtx);
1831 extern rtx find_last_value (rtx, rtx *, rtx, int);
1832 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1833 extern int reg_overlap_mentioned_p (rtx, rtx);
1834 extern rtx set_of (rtx, rtx);
1835 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1836 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1837 extern int dead_or_set_p (rtx, rtx);
1838 extern int dead_or_set_regno_p (rtx, unsigned int);
1839 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1840 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1841 extern rtx find_reg_equal_equiv_note (rtx);
1842 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1843 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1844 extern int pure_call_p (rtx);
1845 extern void remove_note (rtx, rtx);
1846 extern int side_effects_p (rtx);
1847 extern int volatile_refs_p (rtx);
1848 extern int volatile_insn_p (rtx);
1849 extern int may_trap_p (rtx);
1850 extern int inequality_comparisons_p (rtx);
1851 extern rtx replace_rtx (rtx, rtx, rtx);
1852 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1853 extern int replace_label (rtx *, void *);
1854 extern int rtx_referenced_p (rtx, rtx);
1855 extern bool tablejump_p (rtx, rtx *, rtx *);
1856 extern int computed_jump_p (rtx);
1857 typedef int (*rtx_function) (rtx *, void *);
1858 extern int for_each_rtx (rtx *, rtx_function, void *);
1859 extern rtx regno_use_in (unsigned int, rtx);
1860 extern int auto_inc_p (rtx);
1861 extern int in_expr_list_p (rtx, rtx);
1862 extern void remove_node_from_expr_list (rtx, rtx *);
1863 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1864 extern int loc_mentioned_in_p (rtx *, rtx);
1865 extern rtx find_first_parameter_load (rtx, rtx);
1866 extern bool keep_with_call_p (rtx);
1867 extern bool label_is_jump_target_p (rtx, rtx);
1868 extern int insn_rtx_cost (rtx);
1869
1870 /* flow.c */
1871
1872 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1873
1874 /* lists.c */
1875
1876 void free_EXPR_LIST_list (rtx *);
1877 void free_INSN_LIST_list (rtx *);
1878 void free_EXPR_LIST_node (rtx);
1879 void free_INSN_LIST_node (rtx);
1880 rtx alloc_INSN_LIST (rtx, rtx);
1881 rtx alloc_EXPR_LIST (int, rtx, rtx);
1882
1883 /* regclass.c */
1884
1885 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1886 Always at least 3, since the combiner could put that many together
1887 and we want this to remain correct for all the remaining passes. */
1888
1889 extern int max_parallel;
1890
1891 /* Free up register info memory. */
1892 extern void free_reg_info (void);
1893
1894 /* recog.c */
1895 extern int asm_noperands (rtx);
1896 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1897 enum machine_mode *);
1898
1899 extern enum reg_class reg_preferred_class (int);
1900 extern enum reg_class reg_alternate_class (int);
1901
1902 extern void split_all_insns (int);
1903 extern void split_all_insns_noflow (void);
1904
1905 #define MAX_SAVED_CONST_INT 64
1906 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1907
1908 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1909 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1910 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1911 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1912 extern GTY(()) rtx const_true_rtx;
1913
1914 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1915
1916 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1917 same as VOIDmode. */
1918
1919 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1920
1921 /* Likewise, for the constants 1 and 2. */
1922
1923 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1924 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1925
1926 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1927 is used to represent the frame pointer. This is because the
1928 hard frame pointer and the automatic variables are separated by an amount
1929 that cannot be determined until after register allocation. We can assume
1930 that in this case ELIMINABLE_REGS will be defined, one action of which
1931 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1932 #ifndef HARD_FRAME_POINTER_REGNUM
1933 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1934 #endif
1935
1936 /* Index labels for global_rtl. */
1937 enum global_rtl_index
1938 {
1939 GR_PC,
1940 GR_CC0,
1941 GR_STACK_POINTER,
1942 GR_FRAME_POINTER,
1943 /* For register elimination to work properly these hard_frame_pointer_rtx,
1944 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1945 the same register. */
1946 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1947 GR_ARG_POINTER = GR_FRAME_POINTER,
1948 #endif
1949 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1950 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1951 #else
1952 GR_HARD_FRAME_POINTER,
1953 #endif
1954 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1955 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1956 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1957 #else
1958 GR_ARG_POINTER,
1959 #endif
1960 #endif
1961 GR_VIRTUAL_INCOMING_ARGS,
1962 GR_VIRTUAL_STACK_ARGS,
1963 GR_VIRTUAL_STACK_DYNAMIC,
1964 GR_VIRTUAL_OUTGOING_ARGS,
1965 GR_VIRTUAL_CFA,
1966
1967 GR_MAX
1968 };
1969
1970 /* Pointers to standard pieces of rtx are stored here. */
1971 extern GTY(()) rtx global_rtl[GR_MAX];
1972
1973 /* Standard pieces of rtx, to be substituted directly into things. */
1974 #define pc_rtx (global_rtl[GR_PC])
1975 #define cc0_rtx (global_rtl[GR_CC0])
1976
1977 /* All references to certain hard regs, except those created
1978 by allocating pseudo regs into them (when that's possible),
1979 go through these unique rtx objects. */
1980 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1981 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1982 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1983 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1984
1985 extern GTY(()) rtx pic_offset_table_rtx;
1986 extern GTY(()) rtx static_chain_rtx;
1987 extern GTY(()) rtx static_chain_incoming_rtx;
1988 extern GTY(()) rtx return_address_pointer_rtx;
1989
1990 /* Include the RTL generation functions. */
1991
1992 #ifndef GENERATOR_FILE
1993 #include "genrtl.h"
1994 #ifndef USE_MAPPED_LOCATION
1995 #undef gen_rtx_ASM_OPERANDS
1996 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1997 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1998 #endif
1999 #endif
2000
2001 /* There are some RTL codes that require special attention; the
2002 generation functions included above do the raw handling. If you
2003 add to this list, modify special_rtx in gengenrtl.c as well. */
2004
2005 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2006 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2007 extern rtx gen_raw_REG (enum machine_mode, int);
2008 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2009 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2010 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2011
2012 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2013
2014 /* Virtual registers are used during RTL generation to refer to locations into
2015 the stack frame when the actual location isn't known until RTL generation
2016 is complete. The routine instantiate_virtual_regs replaces these with
2017 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2018 a constant. */
2019
2020 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2021
2022 /* This points to the first word of the incoming arguments passed on the stack,
2023 either by the caller or by the callee when pretending it was passed by the
2024 caller. */
2025
2026 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2027
2028 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2029
2030 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2031 variable on the stack. Otherwise, it points to the first variable on
2032 the stack. */
2033
2034 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2035
2036 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2037
2038 /* This points to the location of dynamically-allocated memory on the stack
2039 immediately after the stack pointer has been adjusted by the amount
2040 desired. */
2041
2042 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2043
2044 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2045
2046 /* This points to the location in the stack at which outgoing arguments should
2047 be written when the stack is pre-pushed (arguments pushed using push
2048 insns always use sp). */
2049
2050 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2051
2052 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2053
2054 /* This points to the Canonical Frame Address of the function. This
2055 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2056 but is calculated relative to the arg pointer for simplicity; the
2057 frame pointer nor stack pointer are necessarily fixed relative to
2058 the CFA until after reload. */
2059
2060 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2061
2062 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2063
2064 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2065
2066 /* Nonzero if REGNUM is a pointer into the stack frame. */
2067 #define REGNO_PTR_FRAME_P(REGNUM) \
2068 ((REGNUM) == STACK_POINTER_REGNUM \
2069 || (REGNUM) == FRAME_POINTER_REGNUM \
2070 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2071 || (REGNUM) == ARG_POINTER_REGNUM \
2072 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2073 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2074
2075 /* REGNUM never really appearing in the INSN stream. */
2076 #define INVALID_REGNUM (~(unsigned int) 0)
2077
2078 extern rtx output_constant_def (tree, int);
2079 extern rtx lookup_constant_def (tree);
2080
2081 /* Nonzero after the second flow pass has completed.
2082 Set to 1 or 0 by toplev.c */
2083 extern int flow2_completed;
2084
2085 /* Nonzero after end of reload pass.
2086 Set to 1 or 0 by reload1.c. */
2087
2088 extern int reload_completed;
2089
2090 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2091 extern int epilogue_completed;
2092
2093 /* Set to 1 while reload_as_needed is operating.
2094 Required by some machines to handle any generated moves differently. */
2095
2096 extern int reload_in_progress;
2097
2098 /* If this is nonzero, we do not bother generating VOLATILE
2099 around volatile memory references, and we are willing to
2100 output indirect addresses. If cse is to follow, we reject
2101 indirect addresses so a useful potential cse is generated;
2102 if it is used only once, instruction combination will produce
2103 the same indirect address eventually. */
2104 extern int cse_not_expected;
2105
2106 /* Set to nonzero before life analysis to indicate that it is unsafe to
2107 generate any new pseudo registers. */
2108 extern int no_new_pseudos;
2109
2110 /* Translates rtx code to tree code, for those codes needed by
2111 REAL_ARITHMETIC. The function returns an int because the caller may not
2112 know what `enum tree_code' means. */
2113
2114 extern int rtx_to_tree_code (enum rtx_code);
2115
2116 /* In cse.c */
2117 extern int delete_trivially_dead_insns (rtx, int);
2118 extern int cse_main (rtx, int, int, FILE *);
2119 extern void cse_condition_code_reg (void);
2120
2121 /* In jump.c */
2122 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2123 extern int condjump_p (rtx);
2124 extern int any_condjump_p (rtx);
2125 extern int any_uncondjump_p (rtx);
2126 extern int safe_to_remove_jump_p (rtx);
2127 extern rtx pc_set (rtx);
2128 extern rtx condjump_label (rtx);
2129 extern int simplejump_p (rtx);
2130 extern int returnjump_p (rtx);
2131 extern int onlyjump_p (rtx);
2132 extern int only_sets_cc0_p (rtx);
2133 extern int sets_cc0_p (rtx);
2134 extern int invert_jump_1 (rtx, rtx);
2135 extern int invert_jump (rtx, rtx, int);
2136 extern int rtx_renumbered_equal_p (rtx, rtx);
2137 extern int true_regnum (rtx);
2138 extern unsigned int reg_or_subregno (rtx);
2139 extern int redirect_jump_1 (rtx, rtx);
2140 extern int redirect_jump (rtx, rtx, int);
2141 extern void rebuild_jump_labels (rtx);
2142 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2143 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2144 rtx, rtx, rtx);
2145 extern void delete_for_peephole (rtx, rtx);
2146 extern int condjump_in_parallel_p (rtx);
2147 extern void purge_line_number_notes (rtx);
2148
2149 /* In emit-rtl.c. */
2150 extern int max_reg_num (void);
2151 extern int max_label_num (void);
2152 extern int get_first_label_num (void);
2153 extern void maybe_set_first_label_num (rtx);
2154 extern void delete_insns_since (rtx);
2155 extern void mark_reg_pointer (rtx, int);
2156 extern void mark_user_reg (rtx);
2157 extern void reset_used_flags (rtx);
2158 extern void set_used_flags (rtx);
2159 extern void reorder_insns (rtx, rtx, rtx);
2160 extern void reorder_insns_nobb (rtx, rtx, rtx);
2161 extern int get_max_uid (void);
2162 extern int in_sequence_p (void);
2163 extern void force_next_line_note (void);
2164 extern void init_emit (void);
2165 extern void init_emit_once (int);
2166 extern void push_topmost_sequence (void);
2167 extern void pop_topmost_sequence (void);
2168 extern void reverse_comparison (rtx);
2169 extern void set_new_first_and_last_insn (rtx, rtx);
2170 extern void set_new_last_label_num (int);
2171 extern void unshare_all_rtl (void);
2172 extern void unshare_all_rtl_again (rtx);
2173 extern void unshare_all_rtl_in_chain (rtx);
2174 extern void verify_rtl_sharing (void);
2175 extern void set_first_insn (rtx);
2176 extern void set_last_insn (rtx);
2177 extern void link_cc0_insns (rtx);
2178 extern void add_insn (rtx);
2179 extern void add_insn_before (rtx, rtx);
2180 extern void add_insn_after (rtx, rtx);
2181 extern void remove_insn (rtx);
2182 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
2183 extern enum rtx_code classify_insn (rtx);
2184 extern rtx emit (rtx);
2185 extern void renumber_insns (FILE *);
2186 extern void remove_unnecessary_notes (void);
2187 extern rtx delete_insn (rtx);
2188 extern rtx entry_of_function (void);
2189 extern void delete_insn_chain (rtx, rtx);
2190 extern rtx unlink_insn_chain (rtx, rtx);
2191 extern rtx delete_insn_and_edges (rtx);
2192 extern void delete_insn_chain_and_edges (rtx, rtx);
2193 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2194
2195 /* In combine.c */
2196 extern int combine_instructions (rtx, unsigned int);
2197 extern unsigned int extended_count (rtx, enum machine_mode, int);
2198 extern rtx remove_death (unsigned int, rtx);
2199 extern void dump_combine_stats (FILE *);
2200 extern void dump_combine_total_stats (FILE *);
2201 /* In web.c */
2202 extern void web_main (void);
2203
2204 /* In sched-rgn.c. */
2205 extern void schedule_insns (FILE *);
2206
2207 /* In sched-ebb.c. */
2208 extern void schedule_ebbs (FILE *);
2209
2210 /* In haifa-sched.c. */
2211 extern void fix_sched_param (const char *, const char *);
2212
2213 /* In print-rtl.c */
2214 extern const char *print_rtx_head;
2215 extern void debug_rtx (rtx);
2216 extern void debug_rtx_list (rtx, int);
2217 extern void debug_rtx_range (rtx, rtx);
2218 extern rtx debug_rtx_find (rtx, int);
2219 extern void print_mem_expr (FILE *, tree);
2220 extern void print_rtl (FILE *, rtx);
2221 extern void print_simple_rtl (FILE *, rtx);
2222 extern int print_rtl_single (FILE *, rtx);
2223 extern void print_inline_rtx (FILE *, rtx, int);
2224
2225 /* In loop.c */
2226 extern void init_loop (void);
2227 extern void loop_optimize (rtx, FILE *, int);
2228 extern void branch_target_load_optimize (bool);
2229
2230 /* In function.c */
2231 extern void reposition_prologue_and_epilogue_notes (rtx);
2232 extern void thread_prologue_and_epilogue_insns (rtx);
2233 extern int prologue_epilogue_contains (rtx);
2234 extern int sibcall_epilogue_contains (rtx);
2235 extern void mark_temp_addr_taken (rtx);
2236 extern void update_temp_slot_address (rtx, rtx);
2237
2238 /* In stmt.c */
2239 extern void expand_null_return (void);
2240 extern void expand_naked_return (void);
2241 extern void emit_jump (rtx);
2242 extern int preserve_subexpressions_p (void);
2243
2244 /* In expr.c */
2245 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2246 unsigned int, int);
2247
2248 /* In flow.c */
2249 extern void recompute_reg_usage (rtx, int);
2250 extern int initialize_uninitialized_subregs (void);
2251 extern void delete_dead_jumptables (void);
2252 extern void print_rtl_with_bb (FILE *, rtx);
2253 extern void dump_flow_info (FILE *);
2254
2255 /* In expmed.c */
2256 extern void init_expmed (void);
2257 extern void expand_inc (rtx, rtx);
2258 extern void expand_dec (rtx, rtx);
2259 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2260 unsigned HOST_WIDE_INT, rtx, int, int);
2261
2262 /* In gcse.c */
2263 extern bool can_copy_p (enum machine_mode);
2264 extern rtx fis_get_condition (rtx);
2265 extern int gcse_main (rtx, FILE *);
2266 extern int bypass_jumps (FILE *);
2267 extern void gcse_after_reload_main (rtx, FILE *);
2268
2269 /* In global.c */
2270 extern void mark_elimination (int, int);
2271 extern int global_alloc (FILE *);
2272 extern void dump_global_regs (FILE *);
2273 #ifdef HARD_CONST
2274 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2275 extern void retry_global_alloc (int, HARD_REG_SET);
2276 #endif
2277 extern void build_insn_chain (rtx);
2278
2279 /* In regclass.c */
2280 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2281 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2282 extern void globalize_reg (int);
2283 extern void init_reg_modes_once (void);
2284 extern void init_regs (void);
2285 extern void init_fake_stack_mems (void);
2286 extern void init_reg_sets (void);
2287 extern void regset_release_memory (void);
2288 extern void regclass_init (void);
2289 extern void regclass (rtx, int, FILE *);
2290 extern void reg_scan (rtx, unsigned int, int);
2291 extern void reg_scan_update (rtx, rtx, unsigned int);
2292 extern void fix_register (const char *, int, int);
2293 #ifdef HARD_CONST
2294 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2295 enum machine_mode, unsigned int);
2296 #endif
2297 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2298 enum machine_mode);
2299
2300 /* In regmove.c */
2301 extern void regmove_optimize (rtx, int, FILE *);
2302 extern void combine_stack_adjustments (void);
2303
2304 /* In reorg.c */
2305 extern void dbr_schedule (rtx, FILE *);
2306
2307 /* In local-alloc.c */
2308 extern void dump_local_alloc (FILE *);
2309 extern int local_alloc (void);
2310
2311 /* In reg-stack.c */
2312 extern bool reg_to_stack (FILE *);
2313
2314 /* In calls.c */
2315 enum libcall_type
2316 {
2317 LCT_NORMAL = 0,
2318 LCT_CONST = 1,
2319 LCT_PURE = 2,
2320 LCT_CONST_MAKE_BLOCK = 3,
2321 LCT_PURE_MAKE_BLOCK = 4,
2322 LCT_NORETURN = 5,
2323 LCT_THROW = 6,
2324 LCT_ALWAYS_RETURN = 7,
2325 LCT_RETURNS_TWICE = 8
2326 };
2327
2328 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2329 ...);
2330 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2331 enum machine_mode, int, ...);
2332
2333 /* In unroll.c */
2334 extern int set_dominates_use (int, int, int, rtx, rtx);
2335
2336 /* In varasm.c */
2337 extern int in_data_section (void);
2338 extern void init_varasm_once (void);
2339
2340 /* In rtl.c */
2341 extern void init_rtl (void);
2342 extern void traverse_md_constants (int (*) (void **, void *), void *);
2343 struct md_constant { char *name, *value; };
2344
2345 /* In read-rtl.c */
2346 extern int read_skip_spaces (FILE *);
2347 extern rtx read_rtx (FILE *);
2348 extern const char *read_rtx_filename;
2349 extern int read_rtx_lineno;
2350
2351 /* Redefine abort to report an internal error w/o coredump, and
2352 reporting the location of the error in the source file. This logic
2353 is duplicated in rtl.h and tree.h because every file that needs the
2354 special abort includes one or both. toplev.h gets too few files,
2355 system.h gets too many. */
2356
2357 extern void fancy_abort (const char *, int, const char *)
2358 ATTRIBUTE_NORETURN;
2359 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2360
2361 /* In alias.c */
2362 extern void clear_reg_alias_info (rtx);
2363 extern rtx canon_rtx (rtx);
2364 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2365 extern rtx get_addr (rtx);
2366 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2367 int (*)(rtx, int));
2368 extern int read_dependence (rtx, rtx);
2369 extern int anti_dependence (rtx, rtx);
2370 extern int output_dependence (rtx, rtx);
2371 extern int unchanging_anti_dependence (rtx, rtx);
2372 extern void mark_constant_function (void);
2373 extern void init_alias_once (void);
2374 extern void init_alias_analysis (void);
2375 extern void end_alias_analysis (void);
2376 extern rtx addr_side_effect_eval (rtx, int, int);
2377 extern bool memory_modified_in_insn_p (rtx, rtx);
2378 extern rtx find_base_term (rtx);
2379 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2380 extern rtx get_reg_known_value (unsigned int);
2381 extern bool get_reg_known_equiv_p (unsigned int);
2382
2383 #ifdef STACK_REGS
2384 extern int stack_regs_mentioned (rtx insn);
2385 #endif
2386
2387 /* In toplev.c */
2388 extern GTY(()) rtx stack_limit_rtx;
2389
2390 /* In regrename.c */
2391 extern void regrename_optimize (void);
2392 extern void copyprop_hardreg_forward (void);
2393
2394 /* In ifcvt.c */
2395 extern void if_convert (int);
2396
2397 /* In predict.c */
2398 extern void invert_br_probabilities (rtx);
2399 extern bool expensive_function_p (int);
2400 /* In tracer.c */
2401 extern void tracer (unsigned int);
2402
2403 /* In var-tracking.c */
2404 extern void variable_tracking_main (void);
2405
2406 /* In stor-layout.c. */
2407 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2408 rtx *, rtx *);
2409
2410 /* In loop-unswitch.c */
2411 extern rtx reversed_condition (rtx);
2412 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2413
2414 /* In loop-iv.c */
2415 extern rtx canon_condition (rtx);
2416 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2417
2418 /* In ra.c. */
2419 extern void reg_alloc (void);
2420
2421 /* In modulo-sched.c. */
2422 extern void sms_schedule (FILE *);
2423 \f
2424 struct rtl_hooks
2425 {
2426 rtx (*gen_lowpart) (enum machine_mode, rtx);
2427 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2428 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2429 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2430 unsigned int, unsigned int *);
2431
2432 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2433 };
2434
2435 /* Each pass can provide its own. */
2436 extern struct rtl_hooks rtl_hooks;
2437
2438 /* ... but then it has to restore these. */
2439 extern const struct rtl_hooks general_rtl_hooks;
2440
2441 /* Keep this for the nonce. */
2442 #define gen_lowpart rtl_hooks.gen_lowpart
2443
2444 #endif /* ! GCC_RTL_H */