?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* target.h (struct gcc_target): Add new field to struct cxx: import_export_class.
[official-gcc.git] / gcc / rtl.h
blob53db375e26bd5c1f9c540b332cf23924df6ad54a
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 #include "statistics.h"
25
26 struct function;
27
28 #include "machmode.h"
29 #include "input.h"
30
31 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
32 #undef FLOAT /* Likewise. */
33 #undef ABS /* Likewise. */
34 #undef PC /* Likewise. */
35
36 /* Value used by some passes to "recognize" noop moves as valid
37 instructions. */
38 #define NOOP_MOVE_INSN_CODE INT_MAX
39
40 /* Register Transfer Language EXPRESSIONS CODES */
41
42 #define RTX_CODE enum rtx_code
43 enum rtx_code {
44
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
46 #include "rtl.def" /* rtl expressions are documented here */
47 #undef DEF_RTL_EXPR
48
49 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
50 NUM_RTX_CODE.
51 Assumes default enum value assignment. */
52
53 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
54 /* The cast here, saves many elsewhere. */
55
56 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
57
58 enum rtx_class {
59 /* We check bit 0-1 of some rtx class codes in the predicates below. */
60
61 /* Bit 0 = comparison if 0, arithmetic is 1
62 Bit 1 = 1 if commutative. */
63 RTX_COMPARE, /* 0 */
64 RTX_COMM_COMPARE,
65 RTX_BIN_ARITH,
66 RTX_COMM_ARITH,
67
68 /* Must follow the four preceding values. */
69 RTX_UNARY, /* 4 */
70
71 RTX_EXTRA,
72 RTX_MATCH,
73 RTX_INSN,
74
75 /* Bit 0 = 1 if constant. */
76 RTX_OBJ, /* 8 */
77 RTX_CONST_OBJ,
78
79 RTX_TERNARY,
80 RTX_BITFIELD_OPS,
81 RTX_AUTOINC
82 };
83
84 #define RTX_OBJ_MASK (~1)
85 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
86 #define RTX_COMPARE_MASK (~1)
87 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
88 #define RTX_ARITHMETIC_MASK (~1)
89 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
90 #define RTX_BINARY_MASK (~3)
91 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
92 #define RTX_COMMUTATIVE_MASK (~2)
93 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
94 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
95 #define RTX_EXPR_FIRST (RTX_COMPARE)
96 #define RTX_EXPR_LAST (RTX_UNARY)
97
98 extern const unsigned char rtx_length[NUM_RTX_CODE];
99 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
100
101 extern const char * const rtx_name[NUM_RTX_CODE];
102 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
103
104 extern const char * const rtx_format[NUM_RTX_CODE];
105 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
106
107 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
108 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
109
110 extern const unsigned char rtx_size[NUM_RTX_CODE];
111 extern const unsigned char rtx_next[NUM_RTX_CODE];
112 \f
113 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
114 relative to which the offsets are calculated, as explained in rtl.def. */
115 typedef struct
116 {
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align: 8;
119 /* Flags: */
120 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
121 unsigned min_after_vec: 1; /* minimum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned max_after_vec: 1; /* maximum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned min_after_base: 1; /* minimum address target label is
126 after BASE. */
127 unsigned max_after_base: 1; /* maximum address target label is
128 after BASE. */
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
131 unsigned : 2;
132 unsigned scale : 8;
133 } addr_diff_vec_flags;
134
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. If any element is nonzero, it means
138 the value of the corresponding attribute is unknown. */
139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
140 while EXPR can describe a larger underlying object, which might have a
141 stricter alignment; OFFSET is the offset of the MEM within that object. */
142 typedef struct mem_attrs GTY(())
143 {
144 HOST_WIDE_INT alias; /* Memory alias set. */
145 tree expr; /* expr corresponding to MEM. */
146 rtx offset; /* Offset from start of DECL, as CONST_INT. */
147 rtx size; /* Size in bytes, as a CONST_INT. */
148 unsigned int align; /* Alignment of MEM in bits. */
149 } mem_attrs;
150
151 /* Structure used to describe the attributes of a REG in similar way as
152 mem_attrs does for MEM above. */
153
154 typedef struct reg_attrs GTY(())
155 {
156 tree decl; /* decl corresponding to REG. */
157 HOST_WIDE_INT offset; /* Offset from start of DECL. */
158 } reg_attrs;
159
160 /* Common union for an element of an rtx. */
161
162 union rtunion_def
163 {
164 int rtint;
165 unsigned int rtuint;
166 const char *rtstr;
167 rtx rtx;
168 rtvec rtvec;
169 enum machine_mode rttype;
170 addr_diff_vec_flags rt_addr_diff_vec_flags;
171 struct cselib_val_struct *rt_cselib;
172 struct bitmap_head_def *rtbit;
173 tree rttree;
174 struct basic_block_def *bb;
175 mem_attrs *rtmem;
176 reg_attrs *rtreg;
177 };
178 typedef union rtunion_def rtunion;
179
180 /* RTL expression ("rtx"). */
181
182 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
183 chain_prev ("RTX_PREV (&%h)")))
184 {
185 /* The kind of expression this is. */
186 ENUM_BITFIELD(rtx_code) code: 16;
187
188 /* The kind of value the expression has. */
189 ENUM_BITFIELD(machine_mode) mode : 8;
190
191 /* 1 in a MEM if we should keep the alias set for this mem unchanged
192 when we access a component.
193 1 in a CALL_INSN if it is a sibling call.
194 1 in a SET that is for a return.
195 In a CODE_LABEL, part of the two-bit alternate entry field. */
196 unsigned int jump : 1;
197 /* In a CODE_LABEL, part of the two-bit alternate entry field.
198 1 in a MEM if it cannot trap. */
199 unsigned int call : 1;
200 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
201 1 in a SUBREG if it references an unsigned object whose mode has been
202 from a promoted to a wider mode.
203 1 in a SYMBOL_REF if it addresses something in the per-function
204 constants pool.
205 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
206 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
207 unsigned int unchanging : 1;
208 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
209 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
210 if it has been deleted.
211 1 in a REG expression if corresponds to a variable declared by the user,
212 0 for an internally generated temporary.
213 1 in a SUBREG with a negative value.
214 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
215 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
216 unsigned int volatil : 1;
217 /* 1 in a MEM referring to a field of an aggregate.
218 0 if the MEM was a variable or the result of a * operator in C;
219 1 if it was the result of a . or -> operator (on a struct) in C.
220 1 in a REG if the register is used only in exit code a loop.
221 1 in a SUBREG expression if was generated from a variable with a
222 promoted mode.
223 1 in a CODE_LABEL if the label is used for nonlocal gotos
224 and must not be deleted even if its count is zero.
225 1 in a LABEL_REF if this is a reference to a label outside the
226 current loop.
227 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
228 together with the preceding insn. Valid only within sched.
229 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
230 from the target of a branch. Valid from reorg until end of compilation;
231 cleared before used.
232 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
233 dead code. Valid only during dead-code elimination phase; cleared
234 before use. */
235 unsigned int in_struct : 1;
236 /* At the end of RTL generation, 1 if this rtx is used. This is used for
237 copying shared structure. See `unshare_all_rtl'.
238 In a REG, this is not needed for that purpose, and used instead
239 in `leaf_renumber_regs_insn'.
240 1 in a SYMBOL_REF, means that emit_library_call
241 has used it as the function. */
242 unsigned int used : 1;
243 /* FIXME. This should be unused now that we do inlinining on trees,
244 but it is now being used for MEM_SCALAR_P. It should be renamed,
245 or some other field should be overloaded. */
246 unsigned integrated : 1;
247 /* 1 in an INSN or a SET if this rtx is related to the call frame,
248 either changing how we compute the frame address or saving and
249 restoring registers in the prologue and epilogue.
250 1 in a REG or MEM if it is a pointer.
251 1 in a SYMBOL_REF if it addresses something in the per-function
252 constant string pool. */
253 unsigned frame_related : 1;
254 /* 1 in a REG or PARALLEL that is the current function's return value.
255 1 in a SYMBOL_REF for a weak symbol. */
256 unsigned return_val : 1;
257
258 /* The first element of the operands of this rtx.
259 The number of operands and their types are controlled
260 by the `code' field, according to rtl.def. */
261 union u {
262 rtunion fld[1];
263 HOST_WIDE_INT hwint[1];
264 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
265 };
266
267 /* The size in bytes of an rtx header (code, mode and flags). */
268 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
269
270 /* The size in bytes of an rtx with code CODE. */
271 #define RTX_SIZE(CODE) rtx_size[CODE]
272
273 #define NULL_RTX (rtx) 0
274
275 /* The "next" and "previous" RTX, relative to this one. */
276
277 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
278 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
279
280 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
281 */
282 #define RTX_PREV(X) ((GET_CODE (X) == INSN \
283 || GET_CODE (X) == CALL_INSN \
284 || GET_CODE (X) == JUMP_INSN \
285 || GET_CODE (X) == NOTE \
286 || GET_CODE (X) == BARRIER \
287 || GET_CODE (X) == CODE_LABEL) \
288 && PREV_INSN (X) != NULL \
289 && NEXT_INSN (PREV_INSN (X)) == X \
290 ? PREV_INSN (X) : NULL)
291
292 /* Define macros to access the `code' field of the rtx. */
293
294 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
295 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
296
297 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
298 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
299
300 /* RTL vector. These appear inside RTX's when there is a need
301 for a variable number of things. The principle use is inside
302 PARALLEL expressions. */
303
304 struct rtvec_def GTY(()) {
305 int num_elem; /* number of elements */
306 rtx GTY ((length ("%h.num_elem"))) elem[1];
307 };
308
309 #define NULL_RTVEC (rtvec) 0
310
311 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
312 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
313
314 /* Predicate yielding nonzero iff X is an rtx for a register. */
315 #define REG_P(X) (GET_CODE (X) == REG)
316
317 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
318 #define MEM_P(X) (GET_CODE (X) == MEM)
319
320 /* Predicate yielding nonzero iff X is a label insn. */
321 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
322
323 /* Predicate yielding nonzero iff X is a jump insn. */
324 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
325
326 /* Predicate yielding nonzero iff X is a call insn. */
327 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
328
329 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
330 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
331
332 /* Predicate yielding nonzero iff X is a real insn. */
333 #define INSN_P(X) \
334 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
335
336 /* Predicate yielding nonzero iff X is a note insn. */
337 #define NOTE_P(X) (GET_CODE (X) == NOTE)
338
339 /* Predicate yielding nonzero iff X is a barrier insn. */
340 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
341
342 /* Predicate yielding nonzero iff X is a data for a jump table. */
343 #define JUMP_TABLE_DATA_P(INSN) \
344 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
345 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
346
347 /* 1 if X is a unary operator. */
348
349 #define UNARY_P(X) \
350 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
351
352 /* 1 if X is a binary operator. */
353
354 #define BINARY_P(X) \
355 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
356
357 /* 1 if X is an arithmetic operator. */
358
359 #define ARITHMETIC_P(X) \
360 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
361 == RTX_ARITHMETIC_RESULT)
362
363 /* 1 if X is an arithmetic operator. */
364
365 #define COMMUTATIVE_ARITH_P(X) \
366 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
367
368 /* 1 if X is a commutative arithmetic operator or a comparison operator.
369 These two are sometimes selected together because it is possible to
370 swap the two operands. */
371
372 #define SWAPPABLE_OPERANDS_P(X) \
373 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
374 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
375 | (1 << RTX_COMPARE)))
376
377 /* 1 if X is a non-commutative operator. */
378
379 #define NON_COMMUTATIVE_P(X) \
380 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
381 == RTX_NON_COMMUTATIVE_RESULT)
382
383 /* 1 if X is a commutative operator on integers. */
384
385 #define COMMUTATIVE_P(X) \
386 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
387 == RTX_COMMUTATIVE_RESULT)
388
389 /* 1 if X is a relational operator. */
390
391 #define COMPARISON_P(X) \
392 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
393
394 /* 1 if X is a constant value that is an integer. */
395
396 #define CONSTANT_P(X) \
397 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
398 || GET_CODE (X) == CONST_VECTOR)
399
400 /* 1 if X can be used to represent an object. */
401 #define OBJECT_P(X) \
402 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
403
404 /* General accessor macros for accessing the fields of an rtx. */
405
406 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
407 /* The bit with a star outside the statement expr and an & inside is
408 so that N can be evaluated only once. */
409 #define RTL_CHECK1(RTX, N, C1) __extension__ \
410 (*({ rtx const _rtx = (RTX); const int _n = (N); \
411 const enum rtx_code _code = GET_CODE (_rtx); \
412 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
413 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
414 __FUNCTION__); \
415 if (GET_RTX_FORMAT(_code)[_n] != C1) \
416 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
417 __FUNCTION__); \
418 &_rtx->u.fld[_n]; }))
419
420 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
421 (*({ rtx const _rtx = (RTX); const int _n = (N); \
422 const enum rtx_code _code = GET_CODE (_rtx); \
423 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
424 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
425 __FUNCTION__); \
426 if (GET_RTX_FORMAT(_code)[_n] != C1 \
427 && GET_RTX_FORMAT(_code)[_n] != C2) \
428 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
429 __FUNCTION__); \
430 &_rtx->u.fld[_n]; }))
431
432 #define RTL_CHECKC1(RTX, N, C) __extension__ \
433 (*({ rtx const _rtx = (RTX); const int _n = (N); \
434 if (GET_CODE (_rtx) != (C)) \
435 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
436 __FUNCTION__); \
437 &_rtx->u.fld[_n]; }))
438
439 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
440 (*({ rtx const _rtx = (RTX); const int _n = (N); \
441 const enum rtx_code _code = GET_CODE (_rtx); \
442 if (_code != (C1) && _code != (C2)) \
443 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
444 __FUNCTION__); \
445 &_rtx->u.fld[_n]; }))
446
447 #define RTVEC_ELT(RTVEC, I) __extension__ \
448 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
449 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
450 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
451 __FUNCTION__); \
452 &_rtvec->elem[_i]; }))
453
454 #define XWINT(RTX, N) __extension__ \
455 (*({ rtx const _rtx = (RTX); const int _n = (N); \
456 const enum rtx_code _code = GET_CODE (_rtx); \
457 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
458 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
459 __FUNCTION__); \
460 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
461 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
462 __FUNCTION__); \
463 &_rtx->u.hwint[_n]; }))
464
465 #define XCWINT(RTX, N, C) __extension__ \
466 (*({ rtx const _rtx = (RTX); \
467 if (GET_CODE (_rtx) != (C)) \
468 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
469 __FUNCTION__); \
470 &_rtx->u.hwint[N]; }))
471
472 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
473 const char *)
474 ATTRIBUTE_NORETURN;
475 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
476 const char *)
477 ATTRIBUTE_NORETURN;
478 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
479 int, const char *)
480 ATTRIBUTE_NORETURN;
481 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
482 int, const char *)
483 ATTRIBUTE_NORETURN;
484 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
485 const char *, int, const char *)
486 ATTRIBUTE_NORETURN;
487 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
488 const char *)
489 ATTRIBUTE_NORETURN;
490
491 #else /* not ENABLE_RTL_CHECKING */
492
493 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
494 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
495 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
496 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
497 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
498 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
499 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
500
501 #endif
502
503 /* General accessor macros for accessing the flags of an rtx. */
504
505 /* Access an individual rtx flag, with no checking of any kind. */
506 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
507
508 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
509 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
510 ({ rtx const _rtx = (RTX); \
511 if (GET_CODE(_rtx) != C1) \
512 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
513 __FUNCTION__); \
514 _rtx; })
515
516 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
517 ({ rtx const _rtx = (RTX); \
518 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
519 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
520 __FUNCTION__); \
521 _rtx; })
522
523 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
524 ({ rtx const _rtx = (RTX); \
525 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
526 && GET_CODE(_rtx) != C3) \
527 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
528 __FUNCTION__); \
529 _rtx; })
530
531 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
532 ({ rtx const _rtx = (RTX); \
533 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
534 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
535 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
536 __FUNCTION__); \
537 _rtx; })
538
539 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
540 ({ rtx const _rtx = (RTX); \
541 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
542 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
543 && GET_CODE(_rtx) != C5) \
544 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
545 __FUNCTION__); \
546 _rtx; })
547
548 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
549 __extension__ \
550 ({ rtx const _rtx = (RTX); \
551 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
552 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
553 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
554 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
555 __FUNCTION__); \
556 _rtx; })
557
558 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
559 __extension__ \
560 ({ rtx const _rtx = (RTX); \
561 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
562 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
563 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
564 && GET_CODE(_rtx) != C7) \
565 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
566 __FUNCTION__); \
567 _rtx; })
568
569 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
570 __extension__ \
571 ({ rtx const _rtx = (RTX); \
572 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
573 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
574 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
575 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
576 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
577 __FUNCTION__); \
578 _rtx; })
579
580 extern void rtl_check_failed_flag (const char *, rtx, const char *,
581 int, const char *)
582 ATTRIBUTE_NORETURN
583 ;
584
585 #else /* not ENABLE_RTL_FLAG_CHECKING */
586
587 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
588 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
589 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
590 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
591 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
592 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
593 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
594 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
595 #endif
596
597 #define CLEAR_RTX_FLAGS(RTX) \
598 do { \
599 rtx const _rtx = (RTX); \
600 _rtx->call = 0; \
601 _rtx->frame_related = 0; \
602 _rtx->in_struct = 0; \
603 _rtx->jump = 0; \
604 _rtx->unchanging = 0; \
605 _rtx->used = 0; \
606 _rtx->volatil = 0; \
607 _rtx->unused_flag = 0; \
608 } while (0)
609
610 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint)
611 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr)
612 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx)
613 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec)
614 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype)
615 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit)
616 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree)
617 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb)
618 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr)
619
620 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
621 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
622
623 /* These are like XINT, etc. except that they expect a '0' field instead
624 of the normal type code. */
625
626 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint)
627 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint)
628 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr)
629 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx)
630 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec)
631 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype)
632 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit)
633 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree)
634 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb)
635 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
636 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
637 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem)
638 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg)
639
640 /* Access a '0' field with any type. */
641 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
642
643 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint)
644 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint)
645 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr)
646 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx)
647 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec)
648 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype)
649 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit)
650 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree)
651 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb)
652 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
653 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
654
655 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
656 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
657
658 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx)
659 \f
660 /* ACCESS MACROS for particular fields of insns. */
661
662 /* Holds a unique number for each insn.
663 These are not necessarily sequentially increasing. */
664 #define INSN_UID(INSN) XINT (INSN, 0)
665
666 /* Chain insns together in sequence. */
667 #define PREV_INSN(INSN) XEXP (INSN, 1)
668 #define NEXT_INSN(INSN) XEXP (INSN, 2)
669
670 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
671 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
672 /* The body of an insn. */
673 #define PATTERN(INSN) XEXP (INSN, 5)
674
675 /* Code number of instruction, from when it was recognized.
676 -1 means this instruction has not been recognized yet. */
677 #define INSN_CODE(INSN) XINT (INSN, 6)
678
679 /* Set up in flow.c; empty before then.
680 Holds a chain of INSN_LIST rtx's whose first operands point at
681 previous insns with direct data-flow connections to this one.
682 That means that those insns set variables whose next use is in this insn.
683 They are always in the same basic block as this insn. */
684 #define LOG_LINKS(INSN) XEXP(INSN, 7)
685
686 #define RTX_UNCHANGING_P(RTX) \
687 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
688 #define RTX_FRAME_RELATED_P(RTX) \
689 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
690 JUMP_INSN, BARRIER, SET)->frame_related)
691
692 /* 1 if RTX is an insn that has been deleted. */
693 #define INSN_DELETED_P(RTX) \
694 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
695 CODE_LABEL, BARRIER, NOTE)->volatil)
696
697 /* 1 if RTX is a call to a const or pure function. */
698 #define CONST_OR_PURE_CALL_P(RTX) \
699 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
700 EXPR_LIST)->unchanging)
701
702 /* 1 if RTX is a call_insn for a sibling call. */
703 #define SIBLING_CALL_P(RTX) \
704 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
705
706 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
707 #define INSN_ANNULLED_BRANCH_P(RTX) \
708 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
709
710 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
711 elimination phase. */
712 #define INSN_DEAD_CODE_P(RTX) \
713 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
714
715 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
716 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
717 executed if the branch is taken. For annulled branches with this bit
718 clear, the insn should be executed only if the branch is not taken. */
719 #define INSN_FROM_TARGET_P(RTX) \
720 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
721
722 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
723
724 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
725
726 /* Holds a list of notes on what this insn does to various REGs.
727 It is a chain of EXPR_LIST rtx's, where the second operand is the
728 chain pointer and the first operand is the REG being described.
729 The mode field of the EXPR_LIST contains not a real machine mode
730 but a value from enum reg_note. */
731
732 #define REG_NOTES(INSN) XEXP(INSN, 8)
733
734 /* Don't forget to change reg_note_name in rtl.c. */
735 enum reg_note
736 {
737 /* The value in REG dies in this insn (i.e., it is not needed past
738 this insn). If REG is set in this insn, the REG_DEAD note may,
739 but need not, be omitted. */
740 REG_DEAD = 1,
741
742 /* The REG is autoincremented or autodecremented. */
743 REG_INC,
744
745 /* Describes the insn as a whole; it says that the insn sets a register
746 to a constant value or to be equivalent to a memory address. If the
747 register is spilled to the stack then the constant value should be
748 substituted for it. The contents of the REG_EQUIV is the constant
749 value or memory address, which may be different from the source of
750 the SET although it has the same value. A REG_EQUIV note may also
751 appear on an insn which copies a register parameter to a pseudo-register,
752 if there is a memory address which could be used to hold that
753 pseudo-register throughout the function. */
754 REG_EQUIV,
755
756 /* Like REG_EQUIV except that the destination is only momentarily equal
757 to the specified rtx. Therefore, it cannot be used for substitution;
758 but it can be used for cse. */
759 REG_EQUAL,
760
761 /* This insn copies the return-value of a library call out of the hard reg
762 for return values. This note is actually an INSN_LIST and it points to
763 the first insn involved in setting up arguments for the call. flow.c
764 uses this to delete the entire library call when its result is dead. */
765 REG_RETVAL,
766
767 /* The inverse of REG_RETVAL: it goes on the first insn of the library call
768 and points at the one that has the REG_RETVAL. This note is also an
769 INSN_LIST. */
770 REG_LIBCALL,
771
772 /* The register is always nonnegative during the containing loop. This is
773 used in branches so that decrement and branch instructions terminating
774 on zero can be matched. There must be an insn pattern in the md file
775 named `decrement_and_branch_until_zero' or else this will never be added
776 to any instructions. */
777 REG_NONNEG,
778
779 /* There is no conflict *after this insn* between the register in the note
780 and the destination of this insn. */
781 REG_NO_CONFLICT,
782
783 /* Identifies a register set in this insn and never used. */
784 REG_UNUSED,
785
786 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0,
787 respectively. Normally, these are required to be consecutive insns, but
788 we permit putting a cc0-setting insn in the delay slot of a branch as
789 long as only one copy of the insn exists. In that case, these notes
790 point from one to the other to allow code generation to determine what
791 any require information and to properly update CC_STATUS. These notes
792 are INSN_LISTs. */
793 REG_CC_SETTER, REG_CC_USER,
794
795 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the
796 CODE_LABEL contained in the REG_LABEL note is used by the insn.
797 This note is an INSN_LIST. */
798 REG_LABEL,
799
800 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent
801 write-after-read and write-after-write dependencies respectively.
802 Data dependencies, which are the only type of LOG_LINK created by
803 flow, are represented by a 0 reg note kind. */
804 REG_DEP_ANTI, REG_DEP_OUTPUT,
805
806 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs.
807 It has an integer value. For jumps, it is the probability that this is a
808 taken branch. For calls, it is the probability that this call won't
809 return. */
810 REG_BR_PROB,
811
812 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn
813 before that the code to profile the value is inserted. It contains
814 the results of profiling. */
815 REG_VALUE_PROFILE,
816
817 /* Attached to a call insn; indicates that the call is malloc-like and
818 that the pointer returned cannot alias anything else. */
819 REG_NOALIAS,
820
821 /* Used to optimize rtl generated by dynamic stack allocations for targets
822 where SETJMP_VIA_SAVE_AREA is true. */
823 REG_SAVE_AREA,
824
825 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains
826 CONCAT of two integer value. First specifies the branch predictor
827 that added the note, second specifies the predicted hitrate of branch
828 in the same format as REG_BR_PROB note uses. */
829 REG_BR_PRED,
830
831 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex
832 for DWARF to interpret what they imply. The attached rtx is used
833 instead of intuition. */
834 REG_FRAME_RELATED_EXPR,
835
836 /* Indicates that REG holds the exception context for the function.
837 This context is shared by inline functions, so the code to acquire
838 the real exception context is delayed until after inlining. */
839 REG_EH_CONTEXT,
840
841 /* Indicates what exception region an INSN belongs in. This is used to
842 indicate what region to which a call may throw. REGION 0 indicates
843 that a call cannot throw at all. REGION -1 indicates that it cannot
844 throw, nor will it execute a non-local goto. */
845 REG_EH_REGION,
846
847 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */
848 REG_SAVE_NOTE,
849
850 /* Indicates that this insn (which is part of the prologue) computes
851 a value which might not be used later, and if so it's OK to delete
852 the insn. Normally, deleting any insn in the prologue is an error.
853 At present the parameter is unused and set to (const_int 0). */
854 REG_MAYBE_DEAD,
855
856 /* Indicates that a call does not return. */
857 REG_NORETURN,
858
859 /* Indicates that an indirect jump is a non-local goto instead of a
860 computed goto. */
861 REG_NON_LOCAL_GOTO,
862
863 /* Indicates that a jump crosses between hot and cold sections
864 in a (partitioned) assembly or .o file, and therefore should not be
865 reduced to a simpler jump by optimizations. */
866 REG_CROSSING_JUMP,
867
868 /* This kind of note is generated at each to `setjmp',
869 and similar functions that can return twice. */
870 REG_SETJMP,
871
872 /* Indicate calls that always returns. */
873 REG_ALWAYS_RETURN,
874
875 /* Indicate that the memory load references a vtable. The expression
876 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */
877 REG_VTABLE_REF
878 };
879
880 /* The base value for branch probability notes. */
881 #define REG_BR_PROB_BASE 10000
882
883 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
884 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
885 #define PUT_REG_NOTE_KIND(LINK, KIND) \
886 PUT_MODE (LINK, (enum machine_mode) (KIND))
887
888 /* Names for REG_NOTE's in EXPR_LIST insn's. */
889
890 extern const char * const reg_note_name[];
891 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
892
893 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
894 USE and CLOBBER expressions.
895 USE expressions list the registers filled with arguments that
896 are passed to the function.
897 CLOBBER expressions document the registers explicitly clobbered
898 by this CALL_INSN.
899 Pseudo registers can not be mentioned in this list. */
900 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
901
902 /* The label-number of a code-label. The assembler label
903 is made from `L' and the label-number printed in decimal.
904 Label numbers are unique in a compilation. */
905 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
906
907 #define LINE_NUMBER NOTE
908
909 /* In a NOTE that is a line number, this is a string for the file name that the
910 line is in. We use the same field to record block numbers temporarily in
911 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
912 between ints and pointers if we use a different macro for the block number.)
913 */
914
915 /* Opaque data. */
916 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
917 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
918 #ifdef USE_MAPPED_LOCATION
919 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
920 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
921 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
922 #define SET_INSN_DELETED(INSN) \
923 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
924 #else
925 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
926 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
927 (XLOC).line = NOTE_LINE_NUMBER (INSN))
928 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
929 #define SET_INSN_DELETED(INSN) \
930 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
931 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
932 #endif
933 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
934 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
935 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
936 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
937 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
938 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
939 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
940
941 /* In a NOTE that is a line number, this is the line number.
942 Other kinds of NOTEs are identified by negative numbers here. */
943 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
944
945 /* Nonzero if INSN is a note marking the beginning of a basic block. */
946 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
947 (GET_CODE (INSN) == NOTE \
948 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
949
950 /* Algorithm and flags for prediction. */
951 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
952 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
953 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
954
955 /* Variable declaration and the location of a variable. */
956 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
957 0, VAR_LOCATION))
958 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
959 1, VAR_LOCATION))
960
961 /* Codes that appear in the NOTE_LINE_NUMBER field
962 for kinds of notes that are not line numbers.
963
964 Notice that we do not try to use zero here for any of
965 the special note codes because sometimes the source line
966 actually can be zero! This happens (for example) when we
967 are generating code for the per-translation-unit constructor
968 and destructor routines for some C++ translation unit.
969
970 If you should change any of the following values, or if you
971 should add a new value here, don't forget to change the
972 note_insn_name array in rtl.c. */
973
974 enum insn_note
975 {
976 /* Keep all of these numbers negative. Adjust as needed. */
977 NOTE_INSN_BIAS = -100,
978
979 /* This note is used to get rid of an insn
980 when it isn't safe to patch the insn out of the chain. */
981 NOTE_INSN_DELETED,
982
983 /* These are used to mark the beginning and end of a lexical block.
984 See NOTE_BLOCK and reorder_blocks. */
985 NOTE_INSN_BLOCK_BEG,
986 NOTE_INSN_BLOCK_END,
987
988 /* These mark the extremes of a loop. */
989 NOTE_INSN_LOOP_BEG,
990 NOTE_INSN_LOOP_END,
991
992 /* Generated at the place in a loop that `continue' jumps to. */
993 NOTE_INSN_LOOP_CONT,
994 /* Generated at the start of a duplicated exit test. */
995 NOTE_INSN_LOOP_VTOP,
996
997 /* Generated at the end of a conditional at the top of the loop.
998 This is used to perform a lame form of loop rotation in lieu
999 of actually understanding the loop structure. The note is
1000 discarded after rotation is complete. */
1001 NOTE_INSN_LOOP_END_TOP_COND,
1002
1003 /* This kind of note is generated at the end of the function body,
1004 just before the return insn or return label. In an optimizing
1005 compilation it is deleted by the first jump optimization, after
1006 enabling that optimizer to determine whether control can fall
1007 off the end of the function body without a return statement. */
1008 NOTE_INSN_FUNCTION_END,
1009
1010 /* This marks the point immediately after the last prologue insn. */
1011 NOTE_INSN_PROLOGUE_END,
1012
1013 /* This marks the point immediately prior to the first epilogue insn. */
1014 NOTE_INSN_EPILOGUE_BEG,
1015
1016 /* Generated in place of user-declared labels when they are deleted. */
1017 NOTE_INSN_DELETED_LABEL,
1018
1019 /* This note indicates the start of the real body of the function,
1020 i.e. the point just after all of the parms have been moved into
1021 their homes, etc. */
1022 NOTE_INSN_FUNCTION_BEG,
1023
1024 /* These note where exception handling regions begin and end.
1025 Uses NOTE_EH_HANDLER to identify the region in question. */
1026 NOTE_INSN_EH_REGION_BEG,
1027 NOTE_INSN_EH_REGION_END,
1028
1029 /* Generated whenever a duplicate line number note is output. For example,
1030 one is output after the end of an inline function, in order to prevent
1031 the line containing the inline call from being counted twice in gcov. */
1032 NOTE_INSN_REPEATED_LINE_NUMBER,
1033
1034 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */
1035 NOTE_INSN_BASIC_BLOCK,
1036
1037 /* Record the expected value of a register at a location. Uses
1038 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */
1039 NOTE_INSN_EXPECTED_VALUE,
1040
1041 /* Record a prediction. Uses NOTE_PREDICTION. */
1042 NOTE_INSN_PREDICTION,
1043
1044 /* Record that the current basic block is unlikely to be executed and
1045 should be moved to the UNLIKELY_EXECUTED_TEXT_SECTION. */
1046 NOTE_INSN_UNLIKELY_EXECUTED_CODE,
1047
1048 /* The location of a variable. */
1049 NOTE_INSN_VAR_LOCATION,
1050
1051 NOTE_INSN_MAX
1052 };
1053
1054 /* Names for NOTE insn's other than line numbers. */
1055
1056 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
1057 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1058 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
1059
1060 /* The name of a label, in case it corresponds to an explicit label
1061 in the input source code. */
1062 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1063
1064 /* In jump.c, each label contains a count of the number
1065 of LABEL_REFs that point at it, so unused labels can be deleted. */
1066 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
1067
1068 /* Labels carry a two-bit field composed of the ->jump and ->call
1069 bits. This field indicates whether the label is an alternate
1070 entry point, and if so, what kind. */
1071 enum label_kind
1072 {
1073 LABEL_NORMAL = 0, /* ordinary label */
1074 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1075 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1076 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1077 };
1078
1079 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1080
1081 /* Retrieve the kind of LABEL. */
1082 #define LABEL_KIND(LABEL) __extension__ \
1083 ({ rtx const _label = (LABEL); \
1084 if (GET_CODE (_label) != CODE_LABEL) \
1085 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1086 __FUNCTION__); \
1087 (enum label_kind) ((_label->jump << 1) | _label->call); })
1088
1089 /* Set the kind of LABEL. */
1090 #define SET_LABEL_KIND(LABEL, KIND) do { \
1091 rtx _label = (LABEL); \
1092 unsigned int _kind = (KIND); \
1093 if (GET_CODE (_label) != CODE_LABEL) \
1094 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1095 __FUNCTION__); \
1096 _label->jump = ((_kind >> 1) & 1); \
1097 _label->call = (_kind & 1); \
1098 } while (0)
1099
1100 #else
1101
1102 /* Retrieve the kind of LABEL. */
1103 #define LABEL_KIND(LABEL) \
1104 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1105
1106 /* Set the kind of LABEL. */
1107 #define SET_LABEL_KIND(LABEL, KIND) do { \
1108 rtx _label = (LABEL); \
1109 unsigned int _kind = (KIND); \
1110 _label->jump = ((_kind >> 1) & 1); \
1111 _label->call = (_kind & 1); \
1112 } while (0)
1113
1114 #endif /* rtl flag checking */
1115
1116 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1117
1118 /* The original regno this ADDRESSOF was built for. */
1119 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF)
1120
1121 /* The variable in the register we took the address of. */
1122 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF)
1123
1124 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1125 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1126 be decremented and possibly the label can be deleted. */
1127 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
1128
1129 /* Once basic blocks are found in flow.c,
1130 each CODE_LABEL starts a chain that goes through
1131 all the LABEL_REFs that jump to that label.
1132 The chain eventually winds up at the CODE_LABEL: it is circular. */
1133 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1134 \f
1135 /* This is the field in the LABEL_REF through which the circular chain
1136 of references to a particular label is linked.
1137 This chain is set up in flow.c. */
1138
1139 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
1140
1141 /* Once basic blocks are found in flow.c,
1142 Each LABEL_REF points to its containing instruction with this field. */
1143
1144 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
1145
1146 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
1147 the number the register originally had; for a pseudo register turned into
1148 a hard reg this will hold the old pseudo register number. */
1149
1150 #define REGNO(RTX) XCUINT (RTX, 0, REG)
1151 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1152
1153 /* 1 if RTX is a reg or parallel that is the current function's return
1154 value. */
1155 #define REG_FUNCTION_VALUE_P(RTX) \
1156 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1157
1158 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1159 #define REG_USERVAR_P(RTX) \
1160 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1161
1162 /* 1 if RTX is a reg that holds a pointer value. */
1163 #define REG_POINTER(RTX) \
1164 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1165
1166 /* 1 if RTX is a mem that holds a pointer value. */
1167 #define MEM_POINTER(RTX) \
1168 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1169
1170 /* 1 if the given register REG corresponds to a hard register. */
1171 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1172
1173 /* 1 if the given register number REG_NO corresponds to a hard register. */
1174 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1175
1176 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1177
1178 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1179
1180 /* For a CONST_DOUBLE:
1181 For a DImode, there are two integers CONST_DOUBLE_LOW is the
1182 low-order word and ..._HIGH the high-order.
1183 For a float, there is a REAL_VALUE_TYPE structure, and
1184 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1185 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
1186 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
1187 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
1188
1189 /* For a CONST_VECTOR, return element #n. */
1190 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1191
1192 /* For a CONST_VECTOR, return the number of elements in a vector. */
1193 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1194
1195 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1196 SUBREG_BYTE extracts the byte-number. */
1197
1198 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1199 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1200
1201 /* in rtlanal.c */
1202 /* Return the right cost to give to an operation
1203 to make the cost of the corresponding register-to-register instruction
1204 N times that of a fast register-to-register instruction. */
1205 #define COSTS_N_INSNS(N) ((N) * 4)
1206
1207 /* Maximum cost of an rtl expression. This value has the special meaning
1208 not to use an rtx with this cost under any circumstances. */
1209 #define MAX_COST INT_MAX
1210
1211 extern int rtx_cost (rtx, enum rtx_code);
1212 extern int address_cost (rtx, enum machine_mode);
1213 extern unsigned int subreg_lsb (rtx);
1214 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1215 unsigned int);
1216 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1217 unsigned int, enum machine_mode);
1218 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1219 unsigned int, enum machine_mode);
1220 extern unsigned int subreg_regno (rtx);
1221 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1222 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1223
1224
1225 /* 1 if RTX is a subreg containing a reg that is already known to be
1226 sign- or zero-extended from the mode of the subreg to the mode of
1227 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1228 extension.
1229
1230 When used as a LHS, is means that this extension must be done
1231 when assigning to SUBREG_REG. */
1232
1233 #define SUBREG_PROMOTED_VAR_P(RTX) \
1234 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1235
1236 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1237 do { \
1238 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1239 if ((VAL) < 0) \
1240 _rtx->volatil = 1; \
1241 else { \
1242 _rtx->volatil = 0; \
1243 _rtx->unchanging = (VAL); \
1244 } \
1245 } while (0)
1246 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1247 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1248 ? -1 : (RTX)->unchanging)
1249
1250 /* Access various components of an ASM_OPERANDS rtx. */
1251
1252 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1253 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1254 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1255 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1256 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1257 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1258 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1259 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1260 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1261 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1262 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1263 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1264 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1265 #ifdef USE_MAPPED_LOCATION
1266 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1267 #else
1268 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1269 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1270 #endif
1271
1272 /* 1 if RTX is a mem and we should keep the alias set for this mem
1273 unchanged when we access a component. Set to 1, or example, when we
1274 are already in a non-addressable component of an aggregate. */
1275 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1276 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1277
1278 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1279 #define MEM_VOLATILE_P(RTX) \
1280 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1281 ASM_INPUT)->volatil)
1282
1283 /* 1 if RTX is a mem that refers to an aggregate, either to the
1284 aggregate itself of to a field of the aggregate. If zero, RTX may
1285 or may not be such a reference. */
1286 #define MEM_IN_STRUCT_P(RTX) \
1287 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1288
1289 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may
1290 not refer to a scalar. */
1291 #define MEM_SCALAR_P(RTX) \
1292 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->integrated)
1293
1294 /* 1 if RTX is a mem that cannot trap. */
1295 #define MEM_NOTRAP_P(RTX) \
1296 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1297
1298 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1299 RTX. Otherwise, vice versa. Use this macro only when you are
1300 *sure* that you know that the MEM is in a structure, or is a
1301 scalar. VAL is evaluated only once. */
1302 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1303 do { \
1304 if (VAL) \
1305 { \
1306 MEM_IN_STRUCT_P (RTX) = 1; \
1307 MEM_SCALAR_P (RTX) = 0; \
1308 } \
1309 else \
1310 { \
1311 MEM_IN_STRUCT_P (RTX) = 0; \
1312 MEM_SCALAR_P (RTX) = 1; \
1313 } \
1314 } while (0)
1315
1316 /* The memory attribute block. We provide access macros for each value
1317 in the block and provide defaults if none specified. */
1318 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1319
1320 /* The register attribute block. We provide access macros for each value
1321 in the block and provide defaults if none specified. */
1322 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1323
1324 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1325 set, and may alias anything. Otherwise, the MEM can only alias
1326 MEMs in a conflicting alias set. This value is set in a
1327 language-dependent manner in the front-end, and should not be
1328 altered in the back-end. These set numbers are tested with
1329 alias_sets_conflict_p. */
1330 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1331
1332 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1333 refer to part of a DECL. It may also be a COMPONENT_REF. */
1334 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1335
1336 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1337 RTX that is always a CONST_INT. */
1338 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1339
1340 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1341 is always a CONST_INT. */
1342 #define MEM_SIZE(RTX) \
1343 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1344 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1345 : 0)
1346
1347 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1348 mode as a default when STRICT_ALIGNMENT, but not if not. */
1349 #define MEM_ALIGN(RTX) \
1350 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1351 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1352 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1353
1354 /* For a REG rtx, the decl it is known to refer to, if it is known to
1355 refer to part of a DECL. */
1356 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1357
1358 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1359 RTX that is always a CONST_INT. */
1360 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1361
1362 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1363 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1364 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1365 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1366 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1367 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1368 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
1369 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1370 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1371
1372 /* 1 if RTX is a label_ref to a label outside the loop containing the
1373 reference. */
1374 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1375 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1376
1377 /* 1 if RTX is a label_ref for a nonlocal label. */
1378 /* Likewise in an expr_list for a reg_label note. */
1379 #define LABEL_REF_NONLOCAL_P(RTX) \
1380 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1381 REG_LABEL)->volatil)
1382
1383 /* 1 if RTX is a code_label that should always be considered to be needed. */
1384 #define LABEL_PRESERVE_P(RTX) \
1385 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1386
1387 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1388 #define REG_LOOP_TEST_P(RTX) \
1389 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1390
1391 /* During sched, 1 if RTX is an insn that must be scheduled together
1392 with the preceding insn. */
1393 #define SCHED_GROUP_P(RTX) \
1394 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1395 )->in_struct)
1396
1397 /* For a SET rtx, SET_DEST is the place that is set
1398 and SET_SRC is the value it is set to. */
1399 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1400 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1401 #define SET_IS_RETURN_P(RTX) \
1402 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1403
1404 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1405 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1406 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1407
1408 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1409 conditionally executing the code on, COND_EXEC_CODE is the code
1410 to execute if the condition is true. */
1411 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1412 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1413
1414 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1415 constants pool. */
1416 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1417 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1418
1419 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1420 tree constant pool. This information is private to varasm.c. */
1421 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1422 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1423 (RTX), SYMBOL_REF)->frame_related)
1424
1425 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1426 #define SYMBOL_REF_FLAG(RTX) \
1427 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1428
1429 /* 1 if RTX is a symbol_ref that has been the library function in
1430 emit_library_call. */
1431 #define SYMBOL_REF_USED(RTX) \
1432 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1433
1434 /* 1 if RTX is a symbol_ref for a weak symbol. */
1435 #define SYMBOL_REF_WEAK(RTX) \
1436 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1437
1438 /* The tree (decl or constant) associated with the symbol, or null. */
1439 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1440
1441 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1442 information derivable from the tree decl associated with this symbol.
1443 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1444 decl. In some cases this is a bug. But beyond that, it's nice to cache
1445 this information to avoid recomputing it. Finally, this allows space for
1446 the target to store more than one bit of information, as with
1447 SYMBOL_REF_FLAG. */
1448 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1449
1450 /* These flags are common enough to be defined for all targets. They
1451 are computed by the default version of targetm.encode_section_info. */
1452
1453 /* Set if this symbol is a function. */
1454 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1455 #define SYMBOL_REF_FUNCTION_P(RTX) \
1456 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1457 /* Set if targetm.binds_local_p is true. */
1458 #define SYMBOL_FLAG_LOCAL (1 << 1)
1459 #define SYMBOL_REF_LOCAL_P(RTX) \
1460 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1461 /* Set if targetm.in_small_data_p is true. */
1462 #define SYMBOL_FLAG_SMALL (1 << 2)
1463 #define SYMBOL_REF_SMALL_P(RTX) \
1464 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1465 /* The three-bit field at [5:3] is true for TLS variables; use
1466 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1467 #define SYMBOL_FLAG_TLS_SHIFT 3
1468 #define SYMBOL_REF_TLS_MODEL(RTX) \
1469 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1470 /* Set if this symbol is not defined in this translation unit. */
1471 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1472 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1473 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1474
1475 /* Subsequent bits are available for the target to use. */
1476 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1477 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1478
1479 /* Define a macro to look for REG_INC notes,
1480 but save time on machines where they never exist. */
1481
1482 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1483 #define FIND_REG_INC_NOTE(INSN, REG) \
1484 ((REG) != NULL_RTX && REG_P ((REG)) \
1485 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1486 : find_reg_note ((INSN), REG_INC, (REG)))
1487 #else
1488 #define FIND_REG_INC_NOTE(INSN, REG) 0
1489 #endif
1490
1491 /* Indicate whether the machine has any sort of auto increment addressing.
1492 If not, we can avoid checking for REG_INC notes. */
1493
1494 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1495 #define AUTO_INC_DEC
1496 #endif
1497
1498 #ifndef HAVE_PRE_INCREMENT
1499 #define HAVE_PRE_INCREMENT 0
1500 #endif
1501
1502 #ifndef HAVE_PRE_DECREMENT
1503 #define HAVE_PRE_DECREMENT 0
1504 #endif
1505
1506 #ifndef HAVE_POST_INCREMENT
1507 #define HAVE_POST_INCREMENT 0
1508 #endif
1509
1510 #ifndef HAVE_POST_DECREMENT
1511 #define HAVE_POST_DECREMENT 0
1512 #endif
1513
1514 #ifndef HAVE_POST_MODIFY_DISP
1515 #define HAVE_POST_MODIFY_DISP 0
1516 #endif
1517
1518 #ifndef HAVE_POST_MODIFY_REG
1519 #define HAVE_POST_MODIFY_REG 0
1520 #endif
1521
1522 #ifndef HAVE_PRE_MODIFY_DISP
1523 #define HAVE_PRE_MODIFY_DISP 0
1524 #endif
1525
1526 #ifndef HAVE_PRE_MODIFY_REG
1527 #define HAVE_PRE_MODIFY_REG 0
1528 #endif
1529
1530
1531 /* Some architectures do not have complete pre/post increment/decrement
1532 instruction sets, or only move some modes efficiently. These macros
1533 allow us to tune autoincrement generation. */
1534
1535 #ifndef USE_LOAD_POST_INCREMENT
1536 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1537 #endif
1538
1539 #ifndef USE_LOAD_POST_DECREMENT
1540 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1541 #endif
1542
1543 #ifndef USE_LOAD_PRE_INCREMENT
1544 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1545 #endif
1546
1547 #ifndef USE_LOAD_PRE_DECREMENT
1548 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1549 #endif
1550
1551 #ifndef USE_STORE_POST_INCREMENT
1552 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1553 #endif
1554
1555 #ifndef USE_STORE_POST_DECREMENT
1556 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1557 #endif
1558
1559 #ifndef USE_STORE_PRE_INCREMENT
1560 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1561 #endif
1562
1563 #ifndef USE_STORE_PRE_DECREMENT
1564 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1565 #endif
1566 \f
1567 /* Nonzero if we need to distinguish between the return value of this function
1568 and the return value of a function called by this function. This helps
1569 integrate.c.
1570 This is 1 until after the rtl generation pass.
1571 ??? It appears that this is 1 only when expanding trees to RTL. */
1572 extern int rtx_equal_function_value_matters;
1573
1574 /* Nonzero when we are generating CONCATs. */
1575 extern int generating_concat_p;
1576
1577 /* Generally useful functions. */
1578
1579 /* In expmed.c */
1580 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1581
1582 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C))
1583
1584 /* In builtins.c */
1585 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1586 extern void purge_builtin_constant_p (void);
1587
1588 /* In explow.c */
1589 extern void set_stack_check_libfunc (rtx);
1590 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1591 extern rtx plus_constant_wide (rtx, HOST_WIDE_INT);
1592 extern rtx plus_constant_for_output_wide (rtx, HOST_WIDE_INT);
1593 extern void optimize_save_area_alloca (rtx);
1594
1595 /* In emit-rtl.c */
1596 extern rtvec gen_rtvec (int, ...);
1597 extern rtx copy_insn_1 (rtx);
1598 extern rtx copy_insn (rtx);
1599 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1600 extern rtx emit_copy_of_insn_after (rtx, rtx);
1601 extern void set_reg_attrs_from_mem (rtx, rtx);
1602 extern void set_mem_attrs_from_reg (rtx, rtx);
1603 extern void set_reg_attrs_for_parm (rtx, rtx);
1604 extern void set_reg_pointer_align (rtx, unsigned int);
1605 extern int mem_expr_equal_p (tree, tree);
1606
1607 /* In rtl.c */
1608 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1609 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1610
1611 extern rtvec rtvec_alloc (int);
1612 extern rtx copy_rtx (rtx);
1613 extern void dump_rtx_statistics (void);
1614
1615 /* In emit-rtl.c */
1616 extern rtx copy_rtx_if_shared (rtx);
1617
1618 /* In rtl.c */
1619 extern rtx copy_most_rtx (rtx, rtx);
1620 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1621 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1622 extern int rtx_equal_p (rtx, rtx);
1623
1624 /* In emit-rtl.c */
1625 extern rtvec gen_rtvec_v (int, rtx *);
1626 extern rtx gen_reg_rtx (enum machine_mode);
1627 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1628 extern rtx gen_label_rtx (void);
1629 extern int subreg_hard_regno (rtx, int);
1630 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1631
1632 /* In cse.c */
1633 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1634
1635 /* In emit-rtl.c */
1636 extern rtx gen_highpart (enum machine_mode, rtx);
1637 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1638 extern rtx gen_realpart (enum machine_mode, rtx);
1639 extern rtx gen_imagpart (enum machine_mode, rtx);
1640 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1641
1642 /* In emit-rtl.c */
1643 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1644 extern int subreg_lowpart_p (rtx);
1645 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1646 enum machine_mode);
1647 extern unsigned int subreg_highpart_offset (enum machine_mode,
1648 enum machine_mode);
1649 extern rtx make_safe_from (rtx, rtx);
1650 extern rtx convert_memory_address (enum machine_mode, rtx);
1651 extern rtx get_insns (void);
1652 extern const char *get_insn_name (int);
1653 extern rtx get_last_insn (void);
1654 extern rtx get_last_insn_anywhere (void);
1655 extern rtx get_first_nonnote_insn (void);
1656 extern rtx get_last_nonnote_insn (void);
1657 extern void start_sequence (void);
1658 extern void push_to_sequence (rtx);
1659 extern void end_sequence (void);
1660 extern void push_to_full_sequence (rtx, rtx);
1661 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1662 enum machine_mode);
1663
1664 /* In varasm.c */
1665 extern rtx force_const_mem (enum machine_mode, rtx);
1666
1667 /* In varasm.c */
1668 extern rtx get_pool_constant (rtx);
1669 extern rtx get_pool_constant_mark (rtx, bool *);
1670 extern enum machine_mode get_pool_mode (rtx);
1671 extern rtx get_pool_constant_for_function (struct function *, rtx);
1672 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1673 extern int get_pool_offset (rtx);
1674 extern rtx simplify_subtraction (rtx);
1675
1676 /* In function.c */
1677 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1678 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1679 extern rtx assign_stack_temp_for_type (enum machine_mode,
1680 HOST_WIDE_INT, int, tree);
1681 extern rtx assign_temp (tree, int, int, int);
1682
1683 /* In emit-rtl.c */
1684 extern rtx emit_insn_before (rtx, rtx);
1685 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1686 extern rtx emit_jump_insn_before (rtx, rtx);
1687 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1688 extern rtx emit_call_insn_before (rtx, rtx);
1689 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1690 extern rtx emit_barrier_before (rtx);
1691 extern rtx emit_label_before (rtx, rtx);
1692 extern rtx emit_note_before (int, rtx);
1693 extern rtx emit_insn_after (rtx, rtx);
1694 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1695 extern rtx emit_jump_insn_after (rtx, rtx);
1696 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1697 extern rtx emit_call_insn_after (rtx, rtx);
1698 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1699 extern rtx emit_barrier_after (rtx);
1700 extern rtx emit_label_after (rtx, rtx);
1701 extern rtx emit_note_after (int, rtx);
1702 extern rtx emit_note_copy_after (rtx, rtx);
1703 extern rtx emit_insn (rtx);
1704 extern rtx emit_jump_insn (rtx);
1705 extern rtx emit_call_insn (rtx);
1706 extern rtx emit_label (rtx);
1707 extern rtx emit_barrier (void);
1708 extern rtx emit_note (int);
1709 extern rtx emit_note_copy (rtx);
1710 extern rtx emit_line_note (location_t);
1711 extern rtx make_insn_raw (rtx);
1712 extern void add_function_usage_to (rtx, rtx);
1713 extern rtx last_call_insn (void);
1714 extern rtx previous_insn (rtx);
1715 extern rtx next_insn (rtx);
1716 extern rtx prev_nonnote_insn (rtx);
1717 extern rtx next_nonnote_insn (rtx);
1718 extern rtx prev_real_insn (rtx);
1719 extern rtx next_real_insn (rtx);
1720 extern rtx prev_active_insn (rtx);
1721 extern rtx next_active_insn (rtx);
1722 extern int active_insn_p (rtx);
1723 extern rtx prev_label (rtx);
1724 extern rtx next_label (rtx);
1725 extern rtx skip_consecutive_labels (rtx);
1726 extern rtx next_cc0_user (rtx);
1727 extern rtx prev_cc0_setter (rtx);
1728
1729 #define emit_insn_before_sameloc(INSN, BEFORE) \
1730 emit_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1731 #define emit_jump_insn_before_sameloc(INSN, BEFORE) \
1732 emit_jump_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1733 #define emit_call_insn_before_sameloc(INSN, BEFORE) \
1734 emit_call_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1735 #define emit_insn_after_sameloc(INSN, AFTER) \
1736 emit_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1737 #define emit_jump_insn_after_sameloc(INSN, AFTER) \
1738 emit_jump_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1739 #define emit_call_insn_after_sameloc(INSN, AFTER) \
1740 emit_call_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1741
1742 /* In cfglayout.c */
1743 extern tree choose_inner_scope (tree, tree);
1744 extern int insn_line (rtx);
1745 extern const char * insn_file (rtx);
1746 extern int locator_line (int);
1747 extern const char * locator_file (int);
1748 extern int prologue_locator, epilogue_locator;
1749
1750 /* In jump.c */
1751 extern enum rtx_code reverse_condition (enum rtx_code);
1752 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1753 extern enum rtx_code swap_condition (enum rtx_code);
1754 extern enum rtx_code unsigned_condition (enum rtx_code);
1755 extern enum rtx_code signed_condition (enum rtx_code);
1756 extern void mark_jump_label (rtx, rtx, int);
1757 extern void cleanup_barriers (void);
1758
1759 /* In jump.c */
1760 extern bool squeeze_notes (rtx *, rtx *);
1761 extern rtx delete_related_insns (rtx);
1762 extern void delete_jump (rtx);
1763 extern void delete_barrier (rtx);
1764 extern rtx get_label_before (rtx);
1765 extern rtx get_label_after (rtx);
1766 extern rtx follow_jumps (rtx);
1767
1768 /* In recog.c */
1769 extern rtx *find_constant_term_loc (rtx *);
1770
1771 /* In emit-rtl.c */
1772 extern rtx try_split (rtx, rtx, int);
1773 extern int split_branch_probability;
1774
1775 /* In unknown file */
1776 extern rtx split_insns (rtx, rtx);
1777
1778 /* In simplify-rtx.c */
1779 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1780 enum machine_mode);
1781 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1782 rtx);
1783 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1784 enum machine_mode, rtx, rtx, rtx);
1785 extern rtx simplify_const_relational_operation (enum rtx_code,
1786 enum machine_mode, rtx, rtx);
1787 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1788 enum machine_mode, rtx, rtx);
1789 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1790 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1791 enum machine_mode);
1792 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1793 enum machine_mode, rtx, rtx, rtx);
1794 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1795 enum machine_mode, rtx, rtx);
1796 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1797 unsigned int);
1798 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1799 unsigned int);
1800 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1801 extern rtx simplify_rtx (rtx);
1802 extern rtx avoid_constant_pool_reference (rtx);
1803
1804 /* In function.c */
1805 extern rtx gen_mem_addressof (rtx, tree, int);
1806
1807 /* In regclass.c */
1808 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1809 bool);
1810
1811 /* In emit-rtl.c */
1812 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1813
1814 /* Functions in rtlanal.c */
1815
1816 /* Single set is implemented as macro for performance reasons. */
1817 #define single_set(I) (INSN_P (I) \
1818 ? (GET_CODE (PATTERN (I)) == SET \
1819 ? PATTERN (I) : single_set_1 (I)) \
1820 : NULL_RTX)
1821 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1822
1823 /* Structure used for passing data to REPLACE_LABEL. */
1824 typedef struct replace_label_data
1825 {
1826 rtx r1;
1827 rtx r2;
1828 bool update_label_nuses;
1829 } replace_label_data;
1830
1831 extern int rtx_addr_can_trap_p (rtx);
1832 extern bool nonzero_address_p (rtx);
1833 extern int rtx_unstable_p (rtx);
1834 extern int rtx_varies_p (rtx, int);
1835 extern int rtx_addr_varies_p (rtx, int);
1836 extern HOST_WIDE_INT get_integer_term (rtx);
1837 extern rtx get_related_value (rtx);
1838 extern rtx get_jump_table_offset (rtx, rtx *);
1839 extern int global_reg_mentioned_p (rtx);
1840 extern int reg_mentioned_p (rtx, rtx);
1841 extern int count_occurrences (rtx, rtx, int);
1842 extern int reg_referenced_p (rtx, rtx);
1843 extern int reg_used_between_p (rtx, rtx, rtx);
1844 extern int reg_referenced_between_p (rtx, rtx, rtx);
1845 extern int reg_set_between_p (rtx, rtx, rtx);
1846 extern int regs_set_between_p (rtx, rtx, rtx);
1847 extern int commutative_operand_precedence (rtx);
1848 extern int swap_commutative_operands_p (rtx, rtx);
1849 extern int modified_between_p (rtx, rtx, rtx);
1850 extern int no_labels_between_p (rtx, rtx);
1851 extern int no_jumps_between_p (rtx, rtx);
1852 extern int modified_in_p (rtx, rtx);
1853 extern int insn_dependent_p (rtx, rtx);
1854 extern int reg_set_p (rtx, rtx);
1855 extern rtx single_set_2 (rtx, rtx);
1856 extern int multiple_sets (rtx);
1857 extern int set_noop_p (rtx);
1858 extern int noop_move_p (rtx);
1859 extern rtx find_last_value (rtx, rtx *, rtx, int);
1860 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1861 extern int reg_overlap_mentioned_p (rtx, rtx);
1862 extern rtx set_of (rtx, rtx);
1863 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1864 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1865 extern int dead_or_set_p (rtx, rtx);
1866 extern int dead_or_set_regno_p (rtx, unsigned int);
1867 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1868 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1869 extern rtx find_reg_equal_equiv_note (rtx);
1870 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1871 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1872 extern int pure_call_p (rtx);
1873 extern void remove_note (rtx, rtx);
1874 extern int side_effects_p (rtx);
1875 extern int volatile_refs_p (rtx);
1876 extern int volatile_insn_p (rtx);
1877 extern int may_trap_p (rtx);
1878 extern int inequality_comparisons_p (rtx);
1879 extern rtx replace_rtx (rtx, rtx, rtx);
1880 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1881 extern int replace_label (rtx *, void *);
1882 extern int rtx_referenced_p (rtx, rtx);
1883 extern bool tablejump_p (rtx, rtx *, rtx *);
1884 extern int computed_jump_p (rtx);
1885 typedef int (*rtx_function) (rtx *, void *);
1886 extern int for_each_rtx (rtx *, rtx_function, void *);
1887 extern rtx regno_use_in (unsigned int, rtx);
1888 extern int auto_inc_p (rtx);
1889 extern int in_expr_list_p (rtx, rtx);
1890 extern void remove_node_from_expr_list (rtx, rtx *);
1891 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1892 extern int loc_mentioned_in_p (rtx *, rtx);
1893 extern rtx find_first_parameter_load (rtx, rtx);
1894 extern bool keep_with_call_p (rtx);
1895 extern bool label_is_jump_target_p (rtx, rtx);
1896
1897 /* flow.c */
1898
1899 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1900
1901 /* lists.c */
1902
1903 void free_EXPR_LIST_list (rtx *);
1904 void free_INSN_LIST_list (rtx *);
1905 void free_EXPR_LIST_node (rtx);
1906 void free_INSN_LIST_node (rtx);
1907 rtx alloc_INSN_LIST (rtx, rtx);
1908 rtx alloc_EXPR_LIST (int, rtx, rtx);
1909
1910 /* regclass.c */
1911
1912 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1913 Always at least 3, since the combiner could put that many together
1914 and we want this to remain correct for all the remaining passes. */
1915
1916 extern int max_parallel;
1917
1918 /* Free up register info memory. */
1919 extern void free_reg_info (void);
1920
1921 /* recog.c */
1922 extern int asm_noperands (rtx);
1923 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1924 enum machine_mode *);
1925
1926 extern enum reg_class reg_preferred_class (int);
1927 extern enum reg_class reg_alternate_class (int);
1928
1929 extern void split_all_insns (int);
1930 extern void split_all_insns_noflow (void);
1931
1932 #define MAX_SAVED_CONST_INT 64
1933 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1934
1935 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1936 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1937 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1938 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1939 extern GTY(()) rtx const_true_rtx;
1940
1941 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1942
1943 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1944 same as VOIDmode. */
1945
1946 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1947
1948 /* Likewise, for the constants 1 and 2. */
1949
1950 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1951 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1952
1953 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1954 is used to represent the frame pointer. This is because the
1955 hard frame pointer and the automatic variables are separated by an amount
1956 that cannot be determined until after register allocation. We can assume
1957 that in this case ELIMINABLE_REGS will be defined, one action of which
1958 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1959 #ifndef HARD_FRAME_POINTER_REGNUM
1960 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1961 #endif
1962
1963 /* Index labels for global_rtl. */
1964 enum global_rtl_index
1965 {
1966 GR_PC,
1967 GR_CC0,
1968 GR_STACK_POINTER,
1969 GR_FRAME_POINTER,
1970 /* For register elimination to work properly these hard_frame_pointer_rtx,
1971 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1972 the same register. */
1973 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1974 GR_ARG_POINTER = GR_FRAME_POINTER,
1975 #endif
1976 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1977 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1978 #else
1979 GR_HARD_FRAME_POINTER,
1980 #endif
1981 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1982 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1983 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1984 #else
1985 GR_ARG_POINTER,
1986 #endif
1987 #endif
1988 GR_VIRTUAL_INCOMING_ARGS,
1989 GR_VIRTUAL_STACK_ARGS,
1990 GR_VIRTUAL_STACK_DYNAMIC,
1991 GR_VIRTUAL_OUTGOING_ARGS,
1992 GR_VIRTUAL_CFA,
1993
1994 GR_MAX
1995 };
1996
1997 /* Pointers to standard pieces of rtx are stored here. */
1998 extern GTY(()) rtx global_rtl[GR_MAX];
1999
2000 /* Standard pieces of rtx, to be substituted directly into things. */
2001 #define pc_rtx (global_rtl[GR_PC])
2002 #define cc0_rtx (global_rtl[GR_CC0])
2003
2004 /* All references to certain hard regs, except those created
2005 by allocating pseudo regs into them (when that's possible),
2006 go through these unique rtx objects. */
2007 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2008 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2009 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2010 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2011
2012 extern GTY(()) rtx pic_offset_table_rtx;
2013 extern GTY(()) rtx static_chain_rtx;
2014 extern GTY(()) rtx static_chain_incoming_rtx;
2015 extern GTY(()) rtx return_address_pointer_rtx;
2016
2017 /* Include the RTL generation functions. */
2018
2019 #ifndef NO_GENRTL_H
2020 #include "genrtl.h"
2021 #ifndef USE_MAPPED_LOCATION
2022 #undef gen_rtx_ASM_OPERANDS
2023 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
2024 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
2025 #endif
2026 #endif
2027
2028 /* There are some RTL codes that require special attention; the
2029 generation functions included above do the raw handling. If you
2030 add to this list, modify special_rtx in gengenrtl.c as well. */
2031
2032 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2033 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2034 extern rtx gen_raw_REG (enum machine_mode, int);
2035 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2036 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2037 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2038
2039 /* We need the cast here to ensure that we get the same result both with
2040 and without prototypes. */
2041 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
2042
2043 /* Virtual registers are used during RTL generation to refer to locations into
2044 the stack frame when the actual location isn't known until RTL generation
2045 is complete. The routine instantiate_virtual_regs replaces these with
2046 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2047 a constant. */
2048
2049 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2050
2051 /* This points to the first word of the incoming arguments passed on the stack,
2052 either by the caller or by the callee when pretending it was passed by the
2053 caller. */
2054
2055 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2056
2057 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2058
2059 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2060 variable on the stack. Otherwise, it points to the first variable on
2061 the stack. */
2062
2063 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2064
2065 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2066
2067 /* This points to the location of dynamically-allocated memory on the stack
2068 immediately after the stack pointer has been adjusted by the amount
2069 desired. */
2070
2071 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2072
2073 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2074
2075 /* This points to the location in the stack at which outgoing arguments should
2076 be written when the stack is pre-pushed (arguments pushed using push
2077 insns always use sp). */
2078
2079 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2080
2081 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2082
2083 /* This points to the Canonical Frame Address of the function. This
2084 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2085 but is calculated relative to the arg pointer for simplicity; the
2086 frame pointer nor stack pointer are necessarily fixed relative to
2087 the CFA until after reload. */
2088
2089 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2090
2091 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2092
2093 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2094
2095 /* Nonzero if REGNUM is a pointer into the stack frame. */
2096 #define REGNO_PTR_FRAME_P(REGNUM) \
2097 ((REGNUM) == STACK_POINTER_REGNUM \
2098 || (REGNUM) == FRAME_POINTER_REGNUM \
2099 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2100 || (REGNUM) == ARG_POINTER_REGNUM \
2101 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2102 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2103
2104 /* REGNUM never really appearing in the INSN stream. */
2105 #define INVALID_REGNUM (~(unsigned int) 0)
2106
2107 extern rtx output_constant_def (tree, int);
2108 extern rtx lookup_constant_def (tree);
2109
2110 /* Nonzero after the second flow pass has completed.
2111 Set to 1 or 0 by toplev.c */
2112 extern int flow2_completed;
2113
2114 /* Nonzero after end of reload pass.
2115 Set to 1 or 0 by reload1.c. */
2116
2117 extern int reload_completed;
2118
2119 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2120 extern int epilogue_completed;
2121
2122 /* Set to 1 while reload_as_needed is operating.
2123 Required by some machines to handle any generated moves differently. */
2124
2125 extern int reload_in_progress;
2126
2127 /* If this is nonzero, we do not bother generating VOLATILE
2128 around volatile memory references, and we are willing to
2129 output indirect addresses. If cse is to follow, we reject
2130 indirect addresses so a useful potential cse is generated;
2131 if it is used only once, instruction combination will produce
2132 the same indirect address eventually. */
2133 extern int cse_not_expected;
2134
2135 /* Set to nonzero before life analysis to indicate that it is unsafe to
2136 generate any new pseudo registers. */
2137 extern int no_new_pseudos;
2138
2139 /* Translates rtx code to tree code, for those codes needed by
2140 REAL_ARITHMETIC. The function returns an int because the caller may not
2141 know what `enum tree_code' means. */
2142
2143 extern int rtx_to_tree_code (enum rtx_code);
2144
2145 /* In cse.c */
2146 extern int delete_trivially_dead_insns (rtx, int);
2147 #ifdef BUFSIZ
2148 extern int cse_main (rtx, int, int, FILE *);
2149 #endif
2150 extern void cse_condition_code_reg (void);
2151
2152 /* In jump.c */
2153 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2154 extern int condjump_p (rtx);
2155 extern int any_condjump_p (rtx);
2156 extern int any_uncondjump_p (rtx);
2157 extern int safe_to_remove_jump_p (rtx);
2158 extern rtx pc_set (rtx);
2159 extern rtx condjump_label (rtx);
2160 extern int simplejump_p (rtx);
2161 extern int returnjump_p (rtx);
2162 extern int onlyjump_p (rtx);
2163 extern int only_sets_cc0_p (rtx);
2164 extern int sets_cc0_p (rtx);
2165 extern int invert_jump_1 (rtx, rtx);
2166 extern int invert_jump (rtx, rtx, int);
2167 extern int rtx_renumbered_equal_p (rtx, rtx);
2168 extern int true_regnum (rtx);
2169 extern unsigned int reg_or_subregno (rtx);
2170 extern int redirect_jump_1 (rtx, rtx);
2171 extern int redirect_jump (rtx, rtx, int);
2172 extern void rebuild_jump_labels (rtx);
2173 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2174 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2175 rtx, rtx, rtx);
2176 extern void delete_for_peephole (rtx, rtx);
2177 extern int condjump_in_parallel_p (rtx);
2178 extern void purge_line_number_notes (rtx);
2179
2180 /* In emit-rtl.c. */
2181 extern int max_reg_num (void);
2182 extern int max_label_num (void);
2183 extern int get_first_label_num (void);
2184 extern void maybe_set_first_label_num (rtx);
2185 extern void delete_insns_since (rtx);
2186 extern void mark_reg_pointer (rtx, int);
2187 extern void mark_user_reg (rtx);
2188 extern void reset_used_flags (rtx);
2189 extern void set_used_flags (rtx);
2190 extern void reorder_insns (rtx, rtx, rtx);
2191 extern void reorder_insns_nobb (rtx, rtx, rtx);
2192 extern int get_max_uid (void);
2193 extern int in_sequence_p (void);
2194 extern void force_next_line_note (void);
2195 extern void init_emit (void);
2196 extern void init_emit_once (int);
2197 extern void push_topmost_sequence (void);
2198 extern void pop_topmost_sequence (void);
2199 extern void reverse_comparison (rtx);
2200 extern void set_new_first_and_last_insn (rtx, rtx);
2201 extern void set_new_last_label_num (int);
2202 extern void unshare_all_rtl (void);
2203 extern void unshare_all_rtl_again (rtx);
2204 extern void unshare_all_rtl_in_chain (rtx);
2205 extern void verify_rtl_sharing (void);
2206 extern void set_first_insn (rtx);
2207 extern void set_last_insn (rtx);
2208 extern void link_cc0_insns (rtx);
2209 extern void add_insn (rtx);
2210 extern void add_insn_before (rtx, rtx);
2211 extern void add_insn_after (rtx, rtx);
2212 extern void remove_insn (rtx);
2213 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
2214 extern enum rtx_code classify_insn (rtx);
2215 extern rtx emit (rtx);
2216 /* Query and clear/ restore no_line_numbers. This is used by the
2217 switch / case handling in stmt.c to give proper line numbers in
2218 warnings about unreachable code. */
2219 int force_line_numbers (void);
2220 void restore_line_number_status (int old_value);
2221 extern void renumber_insns (FILE *);
2222 extern void remove_unnecessary_notes (void);
2223 extern rtx delete_insn (rtx);
2224 extern rtx entry_of_function (void);
2225 extern void delete_insn_chain (rtx, rtx);
2226 extern rtx unlink_insn_chain (rtx, rtx);
2227 extern rtx delete_insn_and_edges (rtx);
2228 extern void delete_insn_chain_and_edges (rtx, rtx);
2229 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2230
2231 /* In combine.c */
2232 extern int combine_instructions (rtx, unsigned int);
2233 extern unsigned int extended_count (rtx, enum machine_mode, int);
2234 extern rtx remove_death (unsigned int, rtx);
2235 #ifdef BUFSIZ
2236 extern void dump_combine_stats (FILE *);
2237 extern void dump_combine_total_stats (FILE *);
2238 #endif
2239 /* In web.c */
2240 extern void web_main (void);
2241
2242 /* In sched-rgn.c. */
2243 #ifdef BUFSIZ
2244 extern void schedule_insns (FILE *);
2245 #endif
2246
2247 /* In sched-ebb.c. */
2248 #ifdef BUFSIZ
2249 extern void schedule_ebbs (FILE *);
2250 #endif
2251
2252 /* In haifa-sched.c. */
2253 extern void fix_sched_param (const char *, const char *);
2254
2255 /* In print-rtl.c */
2256 extern const char *print_rtx_head;
2257 extern void debug_rtx (rtx);
2258 extern void debug_rtx_list (rtx, int);
2259 extern void debug_rtx_range (rtx, rtx);
2260 extern rtx debug_rtx_find (rtx, int);
2261 #ifdef BUFSIZ
2262 extern void print_mem_expr (FILE *, tree);
2263 extern void print_rtl (FILE *, rtx);
2264 extern void print_simple_rtl (FILE *, rtx);
2265 extern int print_rtl_single (FILE *, rtx);
2266 extern void print_inline_rtx (FILE *, rtx, int);
2267 #endif
2268
2269 /* In loop.c */
2270 extern void init_loop (void);
2271 #ifdef BUFSIZ
2272 extern void loop_optimize (rtx, FILE *, int);
2273 #endif
2274 extern void branch_target_load_optimize (bool);
2275
2276 /* In function.c */
2277 extern void reposition_prologue_and_epilogue_notes (rtx);
2278 extern void thread_prologue_and_epilogue_insns (rtx);
2279 extern int prologue_epilogue_contains (rtx);
2280 extern int sibcall_epilogue_contains (rtx);
2281 extern void preserve_rtl_expr_result (rtx);
2282 extern void mark_temp_addr_taken (rtx);
2283 extern void update_temp_slot_address (rtx, rtx);
2284 extern void purge_addressof (rtx);
2285 extern void purge_hard_subreg_sets (rtx);
2286
2287 /* In stmt.c */
2288 extern void set_file_and_line_for_stmt (location_t);
2289 extern void expand_null_return (void);
2290 extern void expand_naked_return (void);
2291 extern void emit_jump (rtx);
2292 extern int preserve_subexpressions_p (void);
2293
2294 /* In expr.c */
2295 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2296 unsigned int, int);
2297
2298 /* In flow.c */
2299 extern void recompute_reg_usage (rtx, int);
2300 extern int initialize_uninitialized_subregs (void);
2301 extern void delete_dead_jumptables (void);
2302 #ifdef BUFSIZ
2303 extern void print_rtl_with_bb (FILE *, rtx);
2304 extern void dump_flow_info (FILE *);
2305 #endif
2306
2307 /* In expmed.c */
2308 extern void init_expmed (void);
2309 extern void expand_inc (rtx, rtx);
2310 extern void expand_dec (rtx, rtx);
2311 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2312 unsigned HOST_WIDE_INT, rtx, int, int);
2313
2314 /* In gcse.c */
2315 extern bool can_copy_p (enum machine_mode);
2316 extern rtx fis_get_condition (rtx);
2317 #ifdef BUFSIZ
2318 extern int gcse_main (rtx, FILE *);
2319 extern int bypass_jumps (FILE *);
2320 extern void gcse_after_reload_main (rtx, FILE *);
2321 #endif
2322
2323 /* In global.c */
2324 extern void mark_elimination (int, int);
2325 #ifdef BUFSIZ
2326 extern int global_alloc (FILE *);
2327 extern void dump_global_regs (FILE *);
2328 #endif
2329 #ifdef HARD_CONST
2330 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2331 extern void retry_global_alloc (int, HARD_REG_SET);
2332 #endif
2333 extern void build_insn_chain (rtx);
2334
2335 /* In regclass.c */
2336 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2337 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2338 extern void globalize_reg (int);
2339 extern void init_reg_modes_once (void);
2340 extern void init_regs (void);
2341 extern void init_fake_stack_mems (void);
2342 extern void init_reg_sets (void);
2343 extern void regset_release_memory (void);
2344 extern void regclass_init (void);
2345 extern void regclass (rtx, int, FILE *);
2346 extern void reg_scan (rtx, unsigned int, int);
2347 extern void reg_scan_update (rtx, rtx, unsigned int);
2348 extern void fix_register (const char *, int, int);
2349 #ifdef HARD_CONST
2350 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2351 enum machine_mode, unsigned int);
2352 #endif
2353 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2354 enum machine_mode);
2355
2356 /* In regmove.c */
2357 #ifdef BUFSIZ
2358 extern void regmove_optimize (rtx, int, FILE *);
2359 #endif
2360 extern void combine_stack_adjustments (void);
2361
2362 /* In reorg.c */
2363 #ifdef BUFSIZ
2364 extern void dbr_schedule (rtx, FILE *);
2365 #endif
2366
2367 /* In local-alloc.c */
2368 #ifdef BUFSIZ
2369 extern void dump_local_alloc (FILE *);
2370 #endif
2371 extern int local_alloc (void);
2372
2373 /* In reg-stack.c */
2374 #ifdef BUFSIZ
2375 extern bool reg_to_stack (FILE *);
2376 #endif
2377
2378 /* In calls.c */
2379 enum libcall_type
2380 {
2381 LCT_NORMAL = 0,
2382 LCT_CONST = 1,
2383 LCT_PURE = 2,
2384 LCT_CONST_MAKE_BLOCK = 3,
2385 LCT_PURE_MAKE_BLOCK = 4,
2386 LCT_NORETURN = 5,
2387 LCT_THROW = 6,
2388 LCT_ALWAYS_RETURN = 7,
2389 LCT_RETURNS_TWICE = 8
2390 };
2391
2392 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2393 ...);
2394 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2395 enum machine_mode, int, ...);
2396
2397 /* In unroll.c */
2398 extern int set_dominates_use (int, int, int, rtx, rtx);
2399
2400 /* In varasm.c */
2401 extern int in_data_section (void);
2402 extern void init_varasm_once (void);
2403
2404 /* In rtl.c */
2405 extern void init_rtl (void);
2406 extern void traverse_md_constants (int (*) (void **, void *), void *);
2407 struct md_constant { char *name, *value; };
2408
2409 #ifdef BUFSIZ
2410 extern int read_skip_spaces (FILE *);
2411 extern rtx read_rtx (FILE *);
2412 #endif
2413
2414 extern const char *read_rtx_filename;
2415 extern int read_rtx_lineno;
2416
2417 /* Redefine abort to report an internal error w/o coredump, and
2418 reporting the location of the error in the source file. This logic
2419 is duplicated in rtl.h and tree.h because every file that needs the
2420 special abort includes one or both. toplev.h gets too few files,
2421 system.h gets too many. */
2422
2423 extern void fancy_abort (const char *, int, const char *)
2424 ATTRIBUTE_NORETURN;
2425 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2426
2427 /* In alias.c */
2428 extern void clear_reg_alias_info (rtx);
2429 extern rtx canon_rtx (rtx);
2430 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2431 extern rtx get_addr (rtx);
2432 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2433 int (*)(rtx, int));
2434 extern int read_dependence (rtx, rtx);
2435 extern int anti_dependence (rtx, rtx);
2436 extern int output_dependence (rtx, rtx);
2437 extern int unchanging_anti_dependence (rtx, rtx);
2438 extern void mark_constant_function (void);
2439 extern void init_alias_once (void);
2440 extern void init_alias_analysis (void);
2441 extern void end_alias_analysis (void);
2442 extern rtx addr_side_effect_eval (rtx, int, int);
2443 extern bool memory_modified_in_insn_p (rtx, rtx);
2444 extern rtx find_base_term (rtx);
2445 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2446 extern rtx get_reg_known_value (unsigned int);
2447 extern bool get_reg_known_equiv_p (unsigned int);
2448
2449 #ifdef STACK_REGS
2450 extern int stack_regs_mentioned (rtx insn);
2451 #endif
2452
2453 /* In toplev.c */
2454 extern GTY(()) rtx stack_limit_rtx;
2455
2456 /* In regrename.c */
2457 extern void regrename_optimize (void);
2458 extern void copyprop_hardreg_forward (void);
2459
2460 /* In ifcvt.c */
2461 extern void if_convert (int);
2462
2463 /* In predict.c */
2464 extern void invert_br_probabilities (rtx);
2465 extern bool expensive_function_p (int);
2466 /* In tracer.c */
2467 extern void tracer (void);
2468
2469 /* In var-tracking.c */
2470 extern void variable_tracking_main (void);
2471
2472 /* In stor-layout.c. */
2473 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2474 rtx *, rtx *);
2475
2476 /* In loop-unswitch.c */
2477 extern rtx reversed_condition (rtx);
2478 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2479
2480 /* In loop-iv.c */
2481 extern rtx canon_condition (rtx);
2482 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2483
2484 /* In ra.c. */
2485 extern void reg_alloc (void);
2486
2487 /* In modulo-sched.c. */
2488 #ifdef BUFSIZ
2489 extern void sms_schedule (FILE *);
2490 #endif
2491 \f
2492 struct rtl_hooks
2493 {
2494 rtx (*gen_lowpart) (enum machine_mode, rtx);
2495 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2496 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2497 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2498 unsigned int, unsigned int *);
2499
2500 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2501 };
2502
2503 /* Each pass can provide its own. */
2504 extern struct rtl_hooks rtl_hooks;
2505
2506 /* ... but then it has to restore these. */
2507 extern const struct rtl_hooks general_rtl_hooks;
2508
2509 /* Keep this for the nonce. */
2510 #define gen_lowpart rtl_hooks.gen_lowpart
2511
2512 #endif /* ! GCC_RTL_H */
Mirror of the offical gcc git repository hosted at gcc.gnu.org