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PR tree-optimization/19283
[official-gcc.git] / gcc / rtl.h
blob364c0a2bafba37b71be2b615205c6ad8a98760a1
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 #include "statistics.h"
26 #include "machmode.h"
27 #include "input.h"
28
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
33
34 /* Value used by some passes to "recognize" noop moves as valid
35 instructions. */
36 #define NOOP_MOVE_INSN_CODE INT_MAX
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
55
56 enum rtx_class {
57 /* We check bit 0-1 of some rtx class codes in the predicates below. */
58
59 /* Bit 0 = comparison if 0, arithmetic is 1
60 Bit 1 = 1 if commutative. */
61 RTX_COMPARE, /* 0 */
62 RTX_COMM_COMPARE,
63 RTX_BIN_ARITH,
64 RTX_COMM_ARITH,
65
66 /* Must follow the four preceding values. */
67 RTX_UNARY, /* 4 */
68
69 RTX_EXTRA,
70 RTX_MATCH,
71 RTX_INSN,
72
73 /* Bit 0 = 1 if constant. */
74 RTX_OBJ, /* 8 */
75 RTX_CONST_OBJ,
76
77 RTX_TERNARY,
78 RTX_BITFIELD_OPS,
79 RTX_AUTOINC
80 };
81
82 #define RTX_OBJ_MASK (~1)
83 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
84 #define RTX_COMPARE_MASK (~1)
85 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
86 #define RTX_ARITHMETIC_MASK (~1)
87 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
88 #define RTX_BINARY_MASK (~3)
89 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
90 #define RTX_COMMUTATIVE_MASK (~2)
91 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
92 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
93 #define RTX_EXPR_FIRST (RTX_COMPARE)
94 #define RTX_EXPR_LAST (RTX_UNARY)
95
96 extern const unsigned char rtx_length[NUM_RTX_CODE];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
98
99 extern const char * const rtx_name[NUM_RTX_CODE];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
101
102 extern const char * const rtx_format[NUM_RTX_CODE];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
104
105 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
107
108 extern const unsigned char rtx_size[NUM_RTX_CODE];
109 extern const unsigned char rtx_next[NUM_RTX_CODE];
110 \f
111 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
112 relative to which the offsets are calculated, as explained in rtl.def. */
113 typedef struct
114 {
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align: 8;
117 /* Flags: */
118 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
119 unsigned min_after_vec: 1; /* minimum address target label is
120 after the ADDR_DIFF_VEC. */
121 unsigned max_after_vec: 1; /* maximum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned min_after_base: 1; /* minimum address target label is
124 after BASE. */
125 unsigned max_after_base: 1; /* maximum address target label is
126 after BASE. */
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
129 unsigned : 2;
130 unsigned scale : 8;
131 } addr_diff_vec_flags;
132
133 /* Structure used to describe the attributes of a MEM. These are hashed
134 so MEMs that the same attributes share a data structure. This means
135 they cannot be modified in place. If any element is nonzero, it means
136 the value of the corresponding attribute is unknown. */
137 /* ALIGN and SIZE are the alignment and size of the MEM itself,
138 while EXPR can describe a larger underlying object, which might have a
139 stricter alignment; OFFSET is the offset of the MEM within that object. */
140 typedef struct mem_attrs GTY(())
141 {
142 HOST_WIDE_INT alias; /* Memory alias set. */
143 tree expr; /* expr corresponding to MEM. */
144 rtx offset; /* Offset from start of DECL, as CONST_INT. */
145 rtx size; /* Size in bytes, as a CONST_INT. */
146 unsigned int align; /* Alignment of MEM in bits. */
147 } mem_attrs;
148
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
151
152 typedef struct reg_attrs GTY(())
153 {
154 tree decl; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset; /* Offset from start of DECL. */
156 } reg_attrs;
157
158 /* Common union for an element of an rtx. */
159
160 union rtunion_def
161 {
162 int rt_int;
163 unsigned int rt_uint;
164 const char *rt_str;
165 rtx rt_rtx;
166 rtvec rt_rtvec;
167 enum machine_mode rt_type;
168 addr_diff_vec_flags rt_addr_diff_vec_flags;
169 struct cselib_val_struct *rt_cselib;
170 struct bitmap_head_def *rt_bit;
171 tree rt_tree;
172 struct basic_block_def *rt_bb;
173 mem_attrs *rt_mem;
174 reg_attrs *rt_reg;
175 };
176 typedef union rtunion_def rtunion;
177
178 /* RTL expression ("rtx"). */
179
180 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
181 chain_prev ("RTX_PREV (&%h)")))
182 {
183 /* The kind of expression this is. */
184 ENUM_BITFIELD(rtx_code) code: 16;
185
186 /* The kind of value the expression has. */
187 ENUM_BITFIELD(machine_mode) mode : 8;
188
189 /* 1 in a MEM if we should keep the alias set for this mem unchanged
190 when we access a component.
191 1 in a CALL_INSN if it is a sibling call.
192 1 in a SET that is for a return.
193 In a CODE_LABEL, part of the two-bit alternate entry field. */
194 unsigned int jump : 1;
195 /* In a CODE_LABEL, part of the two-bit alternate entry field.
196 1 in a MEM if it cannot trap. */
197 unsigned int call : 1;
198 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
199 1 in a SUBREG if it references an unsigned object whose mode has been
200 from a promoted to a wider mode.
201 1 in a SYMBOL_REF if it addresses something in the per-function
202 constants pool.
203 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
204 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
205 unsigned int unchanging : 1;
206 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
207 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
208 if it has been deleted.
209 1 in a REG expression if corresponds to a variable declared by the user,
210 0 for an internally generated temporary.
211 1 in a SUBREG with a negative value.
212 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
213 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
214 unsigned int volatil : 1;
215 /* 1 in a MEM referring to a field of an aggregate.
216 0 if the MEM was a variable or the result of a * operator in C;
217 1 if it was the result of a . or -> operator (on a struct) in C.
218 1 in a REG if the register is used only in exit code a loop.
219 1 in a SUBREG expression if was generated from a variable with a
220 promoted mode.
221 1 in a CODE_LABEL if the label is used for nonlocal gotos
222 and must not be deleted even if its count is zero.
223 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
224 together with the preceding insn. Valid only within sched.
225 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
226 from the target of a branch. Valid from reorg until end of compilation;
227 cleared before used. */
228 unsigned int in_struct : 1;
229 /* At the end of RTL generation, 1 if this rtx is used. This is used for
230 copying shared structure. See `unshare_all_rtl'.
231 In a REG, this is not needed for that purpose, and used instead
232 in `leaf_renumber_regs_insn'.
233 1 in a SYMBOL_REF, means that emit_library_call
234 has used it as the function. */
235 unsigned int used : 1;
236 /* 1 in an INSN or a SET if this rtx is related to the call frame,
237 either changing how we compute the frame address or saving and
238 restoring registers in the prologue and epilogue.
239 1 in a REG or MEM if it is a pointer.
240 1 in a SYMBOL_REF if it addresses something in the per-function
241 constant string pool. */
242 unsigned frame_related : 1;
243 /* 1 in a REG or PARALLEL that is the current function's return value.
244 1 in a MEM if it refers to a scalar.
245 1 in a SYMBOL_REF for a weak symbol. */
246 unsigned return_val : 1;
247
248 /* The first element of the operands of this rtx.
249 The number of operands and their types are controlled
250 by the `code' field, according to rtl.def. */
251 union u {
252 rtunion fld[1];
253 HOST_WIDE_INT hwint[1];
254 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
255 };
256
257 /* The size in bytes of an rtx header (code, mode and flags). */
258 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
259
260 /* The size in bytes of an rtx with code CODE. */
261 #define RTX_SIZE(CODE) rtx_size[CODE]
262
263 #define NULL_RTX (rtx) 0
264
265 /* The "next" and "previous" RTX, relative to this one. */
266
267 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
268 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
269
270 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
271 */
272 #define RTX_PREV(X) ((INSN_P (X) \
273 || NOTE_P (X) \
274 || BARRIER_P (X) \
275 || LABEL_P (X)) \
276 && PREV_INSN (X) != NULL \
277 && NEXT_INSN (PREV_INSN (X)) == X \
278 ? PREV_INSN (X) : NULL)
279
280 /* Define macros to access the `code' field of the rtx. */
281
282 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
283 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
284
285 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
286 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
287
288 /* RTL vector. These appear inside RTX's when there is a need
289 for a variable number of things. The principle use is inside
290 PARALLEL expressions. */
291
292 struct rtvec_def GTY(()) {
293 int num_elem; /* number of elements */
294 rtx GTY ((length ("%h.num_elem"))) elem[1];
295 };
296
297 #define NULL_RTVEC (rtvec) 0
298
299 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
300 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
301
302 /* Predicate yielding nonzero iff X is an rtx for a register. */
303 #define REG_P(X) (GET_CODE (X) == REG)
304
305 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
306 #define MEM_P(X) (GET_CODE (X) == MEM)
307
308 /* Predicate yielding nonzero iff X is a label insn. */
309 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
310
311 /* Predicate yielding nonzero iff X is a jump insn. */
312 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
313
314 /* Predicate yielding nonzero iff X is a call insn. */
315 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
316
317 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
318 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
319
320 /* Predicate yielding nonzero iff X is a real insn. */
321 #define INSN_P(X) \
322 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
323
324 /* Predicate yielding nonzero iff X is a note insn. */
325 #define NOTE_P(X) (GET_CODE (X) == NOTE)
326
327 /* Predicate yielding nonzero iff X is a barrier insn. */
328 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
329
330 /* Predicate yielding nonzero iff X is a data for a jump table. */
331 #define JUMP_TABLE_DATA_P(INSN) \
332 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
333 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
334
335 /* 1 if X is a unary operator. */
336
337 #define UNARY_P(X) \
338 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
339
340 /* 1 if X is a binary operator. */
341
342 #define BINARY_P(X) \
343 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
344
345 /* 1 if X is an arithmetic operator. */
346
347 #define ARITHMETIC_P(X) \
348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
349 == RTX_ARITHMETIC_RESULT)
350
351 /* 1 if X is an arithmetic operator. */
352
353 #define COMMUTATIVE_ARITH_P(X) \
354 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
355
356 /* 1 if X is a commutative arithmetic operator or a comparison operator.
357 These two are sometimes selected together because it is possible to
358 swap the two operands. */
359
360 #define SWAPPABLE_OPERANDS_P(X) \
361 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
362 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
363 | (1 << RTX_COMPARE)))
364
365 /* 1 if X is a non-commutative operator. */
366
367 #define NON_COMMUTATIVE_P(X) \
368 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
369 == RTX_NON_COMMUTATIVE_RESULT)
370
371 /* 1 if X is a commutative operator on integers. */
372
373 #define COMMUTATIVE_P(X) \
374 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
375 == RTX_COMMUTATIVE_RESULT)
376
377 /* 1 if X is a relational operator. */
378
379 #define COMPARISON_P(X) \
380 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
381
382 /* 1 if X is a constant value that is an integer. */
383
384 #define CONSTANT_P(X) \
385 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
386 || GET_CODE (X) == CONST_VECTOR)
387
388 /* 1 if X can be used to represent an object. */
389 #define OBJECT_P(X) \
390 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
391
392 /* General accessor macros for accessing the fields of an rtx. */
393
394 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
395 /* The bit with a star outside the statement expr and an & inside is
396 so that N can be evaluated only once. */
397 #define RTL_CHECK1(RTX, N, C1) __extension__ \
398 (*({ rtx const _rtx = (RTX); const int _n = (N); \
399 const enum rtx_code _code = GET_CODE (_rtx); \
400 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
401 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
402 __FUNCTION__); \
403 if (GET_RTX_FORMAT(_code)[_n] != C1) \
404 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
405 __FUNCTION__); \
406 &_rtx->u.fld[_n]; }))
407
408 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
409 (*({ rtx const _rtx = (RTX); const int _n = (N); \
410 const enum rtx_code _code = GET_CODE (_rtx); \
411 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
412 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
413 __FUNCTION__); \
414 if (GET_RTX_FORMAT(_code)[_n] != C1 \
415 && GET_RTX_FORMAT(_code)[_n] != C2) \
416 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
417 __FUNCTION__); \
418 &_rtx->u.fld[_n]; }))
419
420 #define RTL_CHECKC1(RTX, N, C) __extension__ \
421 (*({ rtx const _rtx = (RTX); const int _n = (N); \
422 if (GET_CODE (_rtx) != (C)) \
423 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
424 __FUNCTION__); \
425 &_rtx->u.fld[_n]; }))
426
427 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
428 (*({ rtx const _rtx = (RTX); const int _n = (N); \
429 const enum rtx_code _code = GET_CODE (_rtx); \
430 if (_code != (C1) && _code != (C2)) \
431 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
432 __FUNCTION__); \
433 &_rtx->u.fld[_n]; }))
434
435 #define RTVEC_ELT(RTVEC, I) __extension__ \
436 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
437 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
438 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
439 __FUNCTION__); \
440 &_rtvec->elem[_i]; }))
441
442 #define XWINT(RTX, N) __extension__ \
443 (*({ rtx const _rtx = (RTX); const int _n = (N); \
444 const enum rtx_code _code = GET_CODE (_rtx); \
445 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
446 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
447 __FUNCTION__); \
448 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
449 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
450 __FUNCTION__); \
451 &_rtx->u.hwint[_n]; }))
452
453 #define XCWINT(RTX, N, C) __extension__ \
454 (*({ rtx const _rtx = (RTX); \
455 if (GET_CODE (_rtx) != (C)) \
456 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
457 __FUNCTION__); \
458 &_rtx->u.hwint[N]; }))
459
460 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
461 const char *)
462 ATTRIBUTE_NORETURN;
463 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
464 const char *)
465 ATTRIBUTE_NORETURN;
466 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
467 int, const char *)
468 ATTRIBUTE_NORETURN;
469 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
470 int, const char *)
471 ATTRIBUTE_NORETURN;
472 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
473 const char *, int, const char *)
474 ATTRIBUTE_NORETURN;
475 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
476 const char *)
477 ATTRIBUTE_NORETURN;
478
479 #else /* not ENABLE_RTL_CHECKING */
480
481 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
482 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
483 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
484 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
485 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
486 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
487 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
488
489 #endif
490
491 /* General accessor macros for accessing the flags of an rtx. */
492
493 /* Access an individual rtx flag, with no checking of any kind. */
494 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
495
496 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
497 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
498 ({ rtx const _rtx = (RTX); \
499 if (GET_CODE(_rtx) != C1) \
500 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
501 __FUNCTION__); \
502 _rtx; })
503
504 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
505 ({ rtx const _rtx = (RTX); \
506 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
507 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
508 __FUNCTION__); \
509 _rtx; })
510
511 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
512 ({ rtx const _rtx = (RTX); \
513 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
514 && GET_CODE(_rtx) != C3) \
515 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
516 __FUNCTION__); \
517 _rtx; })
518
519 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
520 ({ rtx const _rtx = (RTX); \
521 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
522 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
523 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
524 __FUNCTION__); \
525 _rtx; })
526
527 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
528 ({ rtx const _rtx = (RTX); \
529 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
530 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
531 && GET_CODE(_rtx) != C5) \
532 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
533 __FUNCTION__); \
534 _rtx; })
535
536 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
537 __extension__ \
538 ({ rtx const _rtx = (RTX); \
539 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
540 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
541 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
542 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
543 __FUNCTION__); \
544 _rtx; })
545
546 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
547 __extension__ \
548 ({ rtx const _rtx = (RTX); \
549 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
550 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
551 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
552 && GET_CODE(_rtx) != C7) \
553 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
554 __FUNCTION__); \
555 _rtx; })
556
557 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
558 __extension__ \
559 ({ rtx const _rtx = (RTX); \
560 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
561 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
562 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
563 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
564 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
565 __FUNCTION__); \
566 _rtx; })
567
568 extern void rtl_check_failed_flag (const char *, rtx, const char *,
569 int, const char *)
570 ATTRIBUTE_NORETURN
571 ;
572
573 #else /* not ENABLE_RTL_FLAG_CHECKING */
574
575 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
576 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
577 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
578 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
579 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
580 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
581 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
582 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
583 #endif
584
585 #define CLEAR_RTX_FLAGS(RTX) \
586 do { \
587 rtx const _rtx = (RTX); \
588 _rtx->jump = 0; \
589 _rtx->call = 0; \
590 _rtx->unchanging = 0; \
591 _rtx->volatil = 0; \
592 _rtx->in_struct = 0; \
593 _rtx->used = 0; \
594 _rtx->frame_related = 0; \
595 _rtx->return_val = 0; \
596 } while (0)
597
598 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
599 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
600 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
601 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
602 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
603 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
604 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
605 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
606 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
607
608 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
609 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
610
611 /* These are like XINT, etc. except that they expect a '0' field instead
612 of the normal type code. */
613
614 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
615 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
616 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
617 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
618 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
619 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
620 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
621 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
622 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
623 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
624 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
625 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
626 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
627
628 /* Access a '0' field with any type. */
629 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
630
631 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
632 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
633 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
634 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
635 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
636 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
637 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
638 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
639 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
640 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
641
642 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
643 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
644
645 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
646 \f
647 /* ACCESS MACROS for particular fields of insns. */
648
649 /* Holds a unique number for each insn.
650 These are not necessarily sequentially increasing. */
651 #define INSN_UID(INSN) XINT (INSN, 0)
652
653 /* Chain insns together in sequence. */
654 #define PREV_INSN(INSN) XEXP (INSN, 1)
655 #define NEXT_INSN(INSN) XEXP (INSN, 2)
656
657 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
658 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
659 /* The body of an insn. */
660 #define PATTERN(INSN) XEXP (INSN, 5)
661
662 /* Code number of instruction, from when it was recognized.
663 -1 means this instruction has not been recognized yet. */
664 #define INSN_CODE(INSN) XINT (INSN, 6)
665
666 /* Set up in flow.c; empty before then.
667 Holds a chain of INSN_LIST rtx's whose first operands point at
668 previous insns with direct data-flow connections to this one.
669 That means that those insns set variables whose next use is in this insn.
670 They are always in the same basic block as this insn. */
671 #define LOG_LINKS(INSN) XEXP(INSN, 7)
672
673 #define RTX_FRAME_RELATED_P(RTX) \
674 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
675 JUMP_INSN, BARRIER, SET)->frame_related)
676
677 /* 1 if RTX is an insn that has been deleted. */
678 #define INSN_DELETED_P(RTX) \
679 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
680 CODE_LABEL, BARRIER, NOTE)->volatil)
681
682 /* 1 if RTX is a call to a const or pure function. */
683 #define CONST_OR_PURE_CALL_P(RTX) \
684 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
685 EXPR_LIST)->unchanging)
686
687 /* 1 if RTX is a call_insn for a sibling call. */
688 #define SIBLING_CALL_P(RTX) \
689 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
690
691 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
692 #define INSN_ANNULLED_BRANCH_P(RTX) \
693 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
694
695 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
696 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
697 executed if the branch is taken. For annulled branches with this bit
698 clear, the insn should be executed only if the branch is not taken. */
699 #define INSN_FROM_TARGET_P(RTX) \
700 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
701
702 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
703 See the comments for ADDR_DIFF_VEC in rtl.def. */
704 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
705
706 /* In a VALUE, the value cselib has assigned to RTX.
707 This is a "struct cselib_val_struct", see cselib.h. */
708 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
709
710 /* Holds a list of notes on what this insn does to various REGs.
711 It is a chain of EXPR_LIST rtx's, where the second operand is the
712 chain pointer and the first operand is the REG being described.
713 The mode field of the EXPR_LIST contains not a real machine mode
714 but a value from enum reg_note. */
715 #define REG_NOTES(INSN) XEXP(INSN, 8)
716
717 enum reg_note
718 {
719 #define DEF_REG_NOTE(NAME) NAME,
720 #include "reg-notes.def"
721 #undef DEF_REG_NOTE
722 REG_NOTE_MAX
723 };
724
725 /* The base value for branch probability notes. */
726 #define REG_BR_PROB_BASE 10000
727
728 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
729 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
730 #define PUT_REG_NOTE_KIND(LINK, KIND) \
731 PUT_MODE (LINK, (enum machine_mode) (KIND))
732
733 /* Names for REG_NOTE's in EXPR_LIST insn's. */
734
735 extern const char * const reg_note_name[];
736 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
737
738 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
739 USE and CLOBBER expressions.
740 USE expressions list the registers filled with arguments that
741 are passed to the function.
742 CLOBBER expressions document the registers explicitly clobbered
743 by this CALL_INSN.
744 Pseudo registers can not be mentioned in this list. */
745 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
746
747 /* The label-number of a code-label. The assembler label
748 is made from `L' and the label-number printed in decimal.
749 Label numbers are unique in a compilation. */
750 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
751
752 /* In a NOTE that is a line number, this is a string for the file name that the
753 line is in. We use the same field to record block numbers temporarily in
754 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
755 between ints and pointers if we use a different macro for the block number.)
756 */
757
758 /* Opaque data. */
759 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
760 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
761 #ifdef USE_MAPPED_LOCATION
762 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
763 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
764 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
765 #define SET_INSN_DELETED(INSN) \
766 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
767 #else
768 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
769 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
770 (XLOC).line = NOTE_LINE_NUMBER (INSN))
771 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
772 #define SET_INSN_DELETED(INSN) \
773 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
774 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
775 #endif
776 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
777 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
778 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
779 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
780 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
781 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
782
783 /* In a NOTE that is a line number, this is the line number.
784 Other kinds of NOTEs are identified by negative numbers here. */
785 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
786
787 /* Nonzero if INSN is a note marking the beginning of a basic block. */
788 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
789 (GET_CODE (INSN) == NOTE \
790 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
791
792 /* Algorithm and flags for prediction. */
793 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
794 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
795 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
796
797 /* Variable declaration and the location of a variable. */
798 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
799 0, VAR_LOCATION))
800 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
801 1, VAR_LOCATION))
802
803 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
804 that are not line numbers. These codes are all negative.
805
806 Notice that we do not try to use zero here for any of
807 the special note codes because sometimes the source line
808 actually can be zero! This happens (for example) when we
809 are generating code for the per-translation-unit constructor
810 and destructor routines for some C++ translation unit. */
811
812 enum insn_note
813 {
814 /* Keep all of these numbers negative. Adjust as needed. */
815 NOTE_INSN_BIAS = -100,
816
817 #define DEF_INSN_NOTE(NAME) NAME,
818 #include "insn-notes.def"
819 #undef DEF_INSN_NOTE
820
821 NOTE_INSN_MAX
822 };
823
824 /* Names for NOTE insn's other than line numbers. */
825
826 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
827 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
828 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
829
830 /* The name of a label, in case it corresponds to an explicit label
831 in the input source code. */
832 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
833
834 /* In jump.c, each label contains a count of the number
835 of LABEL_REFs that point at it, so unused labels can be deleted. */
836 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
837
838 /* Labels carry a two-bit field composed of the ->jump and ->call
839 bits. This field indicates whether the label is an alternate
840 entry point, and if so, what kind. */
841 enum label_kind
842 {
843 LABEL_NORMAL = 0, /* ordinary label */
844 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
845 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
846 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
847 };
848
849 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
850
851 /* Retrieve the kind of LABEL. */
852 #define LABEL_KIND(LABEL) __extension__ \
853 ({ rtx const _label = (LABEL); \
854 if (GET_CODE (_label) != CODE_LABEL) \
855 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
856 __FUNCTION__); \
857 (enum label_kind) ((_label->jump << 1) | _label->call); })
858
859 /* Set the kind of LABEL. */
860 #define SET_LABEL_KIND(LABEL, KIND) do { \
861 rtx _label = (LABEL); \
862 unsigned int _kind = (KIND); \
863 if (GET_CODE (_label) != CODE_LABEL) \
864 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
865 __FUNCTION__); \
866 _label->jump = ((_kind >> 1) & 1); \
867 _label->call = (_kind & 1); \
868 } while (0)
869
870 #else
871
872 /* Retrieve the kind of LABEL. */
873 #define LABEL_KIND(LABEL) \
874 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
875
876 /* Set the kind of LABEL. */
877 #define SET_LABEL_KIND(LABEL, KIND) do { \
878 rtx _label = (LABEL); \
879 unsigned int _kind = (KIND); \
880 _label->jump = ((_kind >> 1) & 1); \
881 _label->call = (_kind & 1); \
882 } while (0)
883
884 #endif /* rtl flag checking */
885
886 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
887
888 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
889 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
890 be decremented and possibly the label can be deleted. */
891 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
892
893 /* Once basic blocks are found in flow.c,
894 each CODE_LABEL starts a chain that goes through
895 all the LABEL_REFs that jump to that label.
896 The chain eventually winds up at the CODE_LABEL: it is circular. */
897 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
898 \f
899 /* This is the field in the LABEL_REF through which the circular chain
900 of references to a particular label is linked.
901 FIXME: This chain is used in loop.c and in the SH backend.
902 Since loop.c is about to go away, it could be a win to replace
903 the uses of this in the SH backend with something else. */
904 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
905
906 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
907 the number the register originally had; for a pseudo register turned into
908 a hard reg this will hold the old pseudo register number. */
909
910 #define REGNO(RTX) XCUINT (RTX, 0, REG)
911 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
912
913 /* 1 if RTX is a reg or parallel that is the current function's return
914 value. */
915 #define REG_FUNCTION_VALUE_P(RTX) \
916 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
917
918 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
919 #define REG_USERVAR_P(RTX) \
920 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
921
922 /* 1 if RTX is a reg that holds a pointer value. */
923 #define REG_POINTER(RTX) \
924 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
925
926 /* 1 if RTX is a mem that holds a pointer value. */
927 #define MEM_POINTER(RTX) \
928 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
929
930 /* 1 if the given register REG corresponds to a hard register. */
931 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
932
933 /* 1 if the given register number REG_NO corresponds to a hard register. */
934 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
935
936 /* For a CONST_INT rtx, INTVAL extracts the integer. */
937 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
938
939 /* For a CONST_DOUBLE:
940 For a DImode, there are two integers CONST_DOUBLE_LOW is the
941 low-order word and ..._HIGH the high-order.
942 For a float, there is a REAL_VALUE_TYPE structure, and
943 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
944 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
945 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
946 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
947
948 /* For a CONST_VECTOR, return element #n. */
949 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
950
951 /* For a CONST_VECTOR, return the number of elements in a vector. */
952 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
953
954 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
955 SUBREG_BYTE extracts the byte-number. */
956
957 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
958 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
959
960 /* in rtlanal.c */
961 /* Return the right cost to give to an operation
962 to make the cost of the corresponding register-to-register instruction
963 N times that of a fast register-to-register instruction. */
964 #define COSTS_N_INSNS(N) ((N) * 4)
965
966 /* Maximum cost of an rtl expression. This value has the special meaning
967 not to use an rtx with this cost under any circumstances. */
968 #define MAX_COST INT_MAX
969
970 extern int rtx_cost (rtx, enum rtx_code);
971 extern int address_cost (rtx, enum machine_mode);
972 extern unsigned int subreg_lsb (rtx);
973 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
974 unsigned int);
975 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
976 unsigned int, enum machine_mode);
977 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
978 unsigned int, enum machine_mode);
979 extern unsigned int subreg_regno (rtx);
980 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
981 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
982
983
984 /* 1 if RTX is a subreg containing a reg that is already known to be
985 sign- or zero-extended from the mode of the subreg to the mode of
986 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
987 extension.
988
989 When used as a LHS, is means that this extension must be done
990 when assigning to SUBREG_REG. */
991
992 #define SUBREG_PROMOTED_VAR_P(RTX) \
993 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
994
995 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
996 do { \
997 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
998 if ((VAL) < 0) \
999 _rtx->volatil = 1; \
1000 else { \
1001 _rtx->volatil = 0; \
1002 _rtx->unchanging = (VAL); \
1003 } \
1004 } while (0)
1005 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1006 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1007 ? -1 : (RTX)->unchanging)
1008
1009 /* Access various components of an ASM_OPERANDS rtx. */
1010
1011 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1012 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1013 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1014 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1015 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1016 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1017 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1018 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1019 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1020 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1021 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1022 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1023 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1024 #ifdef USE_MAPPED_LOCATION
1025 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1026 #else
1027 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1028 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1029 #endif
1030
1031 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1032 #define MEM_READONLY_P(RTX) \
1033 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1034
1035 /* 1 if RTX is a mem and we should keep the alias set for this mem
1036 unchanged when we access a component. Set to 1, or example, when we
1037 are already in a non-addressable component of an aggregate. */
1038 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1039 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1040
1041 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1042 #define MEM_VOLATILE_P(RTX) \
1043 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1044 ASM_INPUT)->volatil)
1045
1046 /* 1 if RTX is a mem that refers to an aggregate, either to the
1047 aggregate itself of to a field of the aggregate. If zero, RTX may
1048 or may not be such a reference. */
1049 #define MEM_IN_STRUCT_P(RTX) \
1050 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1051
1052 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1053 not refer to a scalar. */
1054 #define MEM_SCALAR_P(RTX) \
1055 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1056
1057 /* 1 if RTX is a mem that cannot trap. */
1058 #define MEM_NOTRAP_P(RTX) \
1059 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1060
1061 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1062 RTX. Otherwise, vice versa. Use this macro only when you are
1063 *sure* that you know that the MEM is in a structure, or is a
1064 scalar. VAL is evaluated only once. */
1065 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1066 do { \
1067 if (VAL) \
1068 { \
1069 MEM_IN_STRUCT_P (RTX) = 1; \
1070 MEM_SCALAR_P (RTX) = 0; \
1071 } \
1072 else \
1073 { \
1074 MEM_IN_STRUCT_P (RTX) = 0; \
1075 MEM_SCALAR_P (RTX) = 1; \
1076 } \
1077 } while (0)
1078
1079 /* The memory attribute block. We provide access macros for each value
1080 in the block and provide defaults if none specified. */
1081 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1082
1083 /* The register attribute block. We provide access macros for each value
1084 in the block and provide defaults if none specified. */
1085 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1086
1087 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1088 set, and may alias anything. Otherwise, the MEM can only alias
1089 MEMs in a conflicting alias set. This value is set in a
1090 language-dependent manner in the front-end, and should not be
1091 altered in the back-end. These set numbers are tested with
1092 alias_sets_conflict_p. */
1093 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1094
1095 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1096 refer to part of a DECL. It may also be a COMPONENT_REF. */
1097 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1098
1099 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1100 RTX that is always a CONST_INT. */
1101 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1102
1103 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1104 is always a CONST_INT. */
1105 #define MEM_SIZE(RTX) \
1106 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1107 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1108 : 0)
1109
1110 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1111 mode as a default when STRICT_ALIGNMENT, but not if not. */
1112 #define MEM_ALIGN(RTX) \
1113 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1114 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1115 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1116
1117 /* For a REG rtx, the decl it is known to refer to, if it is known to
1118 refer to part of a DECL. */
1119 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1120
1121 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1122 RTX that is always a CONST_INT. */
1123 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1124
1125 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1126 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1127 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1128 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1129 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1130 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1131 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1132 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1133 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1134
1135 /* 1 if RTX is a label_ref to a label outside the loop containing the
1136 reference. */
1137 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1138 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1139
1140 /* 1 if RTX is a label_ref for a nonlocal label. */
1141 /* Likewise in an expr_list for a reg_label note. */
1142 #define LABEL_REF_NONLOCAL_P(RTX) \
1143 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1144 REG_LABEL)->volatil)
1145
1146 /* 1 if RTX is a code_label that should always be considered to be needed. */
1147 #define LABEL_PRESERVE_P(RTX) \
1148 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1149
1150 /* During sched, 1 if RTX is an insn that must be scheduled together
1151 with the preceding insn. */
1152 #define SCHED_GROUP_P(RTX) \
1153 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1154 )->in_struct)
1155
1156 /* For a SET rtx, SET_DEST is the place that is set
1157 and SET_SRC is the value it is set to. */
1158 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1159 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1160 #define SET_IS_RETURN_P(RTX) \
1161 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1162
1163 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1164 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1165 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1166
1167 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1168 conditionally executing the code on, COND_EXEC_CODE is the code
1169 to execute if the condition is true. */
1170 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1171 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1172
1173 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1174 constants pool. */
1175 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1176 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1177
1178 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1179 tree constant pool. This information is private to varasm.c. */
1180 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1181 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1182 (RTX), SYMBOL_REF)->frame_related)
1183
1184 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1185 #define SYMBOL_REF_FLAG(RTX) \
1186 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1187
1188 /* 1 if RTX is a symbol_ref that has been the library function in
1189 emit_library_call. */
1190 #define SYMBOL_REF_USED(RTX) \
1191 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1192
1193 /* 1 if RTX is a symbol_ref for a weak symbol. */
1194 #define SYMBOL_REF_WEAK(RTX) \
1195 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1196
1197 /* The tree (decl or constant) associated with the symbol, or null. */
1198 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1199
1200 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1201 information derivable from the tree decl associated with this symbol.
1202 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1203 decl. In some cases this is a bug. But beyond that, it's nice to cache
1204 this information to avoid recomputing it. Finally, this allows space for
1205 the target to store more than one bit of information, as with
1206 SYMBOL_REF_FLAG. */
1207 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1208
1209 /* These flags are common enough to be defined for all targets. They
1210 are computed by the default version of targetm.encode_section_info. */
1211
1212 /* Set if this symbol is a function. */
1213 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1214 #define SYMBOL_REF_FUNCTION_P(RTX) \
1215 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1216 /* Set if targetm.binds_local_p is true. */
1217 #define SYMBOL_FLAG_LOCAL (1 << 1)
1218 #define SYMBOL_REF_LOCAL_P(RTX) \
1219 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1220 /* Set if targetm.in_small_data_p is true. */
1221 #define SYMBOL_FLAG_SMALL (1 << 2)
1222 #define SYMBOL_REF_SMALL_P(RTX) \
1223 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1224 /* The three-bit field at [5:3] is true for TLS variables; use
1225 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1226 #define SYMBOL_FLAG_TLS_SHIFT 3
1227 #define SYMBOL_REF_TLS_MODEL(RTX) \
1228 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1229 /* Set if this symbol is not defined in this translation unit. */
1230 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1231 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1232 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1233
1234 /* Subsequent bits are available for the target to use. */
1235 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1236 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1237
1238 /* Define a macro to look for REG_INC notes,
1239 but save time on machines where they never exist. */
1240
1241 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1242 #define FIND_REG_INC_NOTE(INSN, REG) \
1243 ((REG) != NULL_RTX && REG_P ((REG)) \
1244 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1245 : find_reg_note ((INSN), REG_INC, (REG)))
1246 #else
1247 #define FIND_REG_INC_NOTE(INSN, REG) 0
1248 #endif
1249
1250 /* Indicate whether the machine has any sort of auto increment addressing.
1251 If not, we can avoid checking for REG_INC notes. */
1252
1253 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1254 #define AUTO_INC_DEC
1255 #endif
1256
1257 #ifndef HAVE_PRE_INCREMENT
1258 #define HAVE_PRE_INCREMENT 0
1259 #endif
1260
1261 #ifndef HAVE_PRE_DECREMENT
1262 #define HAVE_PRE_DECREMENT 0
1263 #endif
1264
1265 #ifndef HAVE_POST_INCREMENT
1266 #define HAVE_POST_INCREMENT 0
1267 #endif
1268
1269 #ifndef HAVE_POST_DECREMENT
1270 #define HAVE_POST_DECREMENT 0
1271 #endif
1272
1273 #ifndef HAVE_POST_MODIFY_DISP
1274 #define HAVE_POST_MODIFY_DISP 0
1275 #endif
1276
1277 #ifndef HAVE_POST_MODIFY_REG
1278 #define HAVE_POST_MODIFY_REG 0
1279 #endif
1280
1281 #ifndef HAVE_PRE_MODIFY_DISP
1282 #define HAVE_PRE_MODIFY_DISP 0
1283 #endif
1284
1285 #ifndef HAVE_PRE_MODIFY_REG
1286 #define HAVE_PRE_MODIFY_REG 0
1287 #endif
1288
1289
1290 /* Some architectures do not have complete pre/post increment/decrement
1291 instruction sets, or only move some modes efficiently. These macros
1292 allow us to tune autoincrement generation. */
1293
1294 #ifndef USE_LOAD_POST_INCREMENT
1295 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1296 #endif
1297
1298 #ifndef USE_LOAD_POST_DECREMENT
1299 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1300 #endif
1301
1302 #ifndef USE_LOAD_PRE_INCREMENT
1303 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1304 #endif
1305
1306 #ifndef USE_LOAD_PRE_DECREMENT
1307 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1308 #endif
1309
1310 #ifndef USE_STORE_POST_INCREMENT
1311 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1312 #endif
1313
1314 #ifndef USE_STORE_POST_DECREMENT
1315 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1316 #endif
1317
1318 #ifndef USE_STORE_PRE_INCREMENT
1319 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1320 #endif
1321
1322 #ifndef USE_STORE_PRE_DECREMENT
1323 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1324 #endif
1325 \f
1326 /* Nonzero when we are generating CONCATs. */
1327 extern int generating_concat_p;
1328
1329 /* Nonzero when we are expanding trees to RTL. */
1330 extern int currently_expanding_to_rtl;
1331
1332 /* Generally useful functions. */
1333
1334 /* In expmed.c */
1335 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1336
1337 /* In builtins.c */
1338 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1339
1340 /* In explow.c */
1341 extern void set_stack_check_libfunc (rtx);
1342 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1343 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1344 extern void optimize_save_area_alloca (void);
1345
1346 /* In emit-rtl.c */
1347 extern rtvec gen_rtvec (int, ...);
1348 extern rtx copy_insn_1 (rtx);
1349 extern rtx copy_insn (rtx);
1350 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1351 extern rtx emit_copy_of_insn_after (rtx, rtx);
1352 extern void set_reg_attrs_from_mem (rtx, rtx);
1353 extern void set_mem_attrs_from_reg (rtx, rtx);
1354 extern void set_reg_attrs_for_parm (rtx, rtx);
1355 extern int mem_expr_equal_p (tree, tree);
1356
1357 /* In rtl.c */
1358 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1359 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1360
1361 extern rtvec rtvec_alloc (int);
1362 extern rtx copy_rtx (rtx);
1363 extern void dump_rtx_statistics (void);
1364
1365 /* In emit-rtl.c */
1366 extern rtx copy_rtx_if_shared (rtx);
1367
1368 /* In rtl.c */
1369 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1370 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1371 extern int rtx_equal_p (rtx, rtx);
1372
1373 /* In emit-rtl.c */
1374 extern rtvec gen_rtvec_v (int, rtx *);
1375 extern rtx gen_reg_rtx (enum machine_mode);
1376 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1377 extern rtx gen_label_rtx (void);
1378 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1379
1380 /* In cse.c */
1381 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1382
1383 /* In emit-rtl.c */
1384 extern rtx gen_highpart (enum machine_mode, rtx);
1385 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1386 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1387
1388 /* In emit-rtl.c */
1389 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1390 extern int subreg_lowpart_p (rtx);
1391 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1392 enum machine_mode);
1393 extern unsigned int subreg_highpart_offset (enum machine_mode,
1394 enum machine_mode);
1395 extern rtx make_safe_from (rtx, rtx);
1396 extern rtx convert_memory_address (enum machine_mode, rtx);
1397 extern rtx get_insns (void);
1398 extern const char *get_insn_name (int);
1399 extern rtx get_last_insn (void);
1400 extern rtx get_last_insn_anywhere (void);
1401 extern rtx get_first_nonnote_insn (void);
1402 extern rtx get_last_nonnote_insn (void);
1403 extern void start_sequence (void);
1404 extern void push_to_sequence (rtx);
1405 extern void end_sequence (void);
1406 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1407 enum machine_mode);
1408
1409 /* In loop-iv.c */
1410
1411 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1412
1413 /* In varasm.c */
1414 extern rtx force_const_mem (enum machine_mode, rtx);
1415
1416 /* In varasm.c */
1417
1418 struct function;
1419 extern rtx get_pool_constant (rtx);
1420 extern rtx get_pool_constant_mark (rtx, bool *);
1421 extern enum machine_mode get_pool_mode (rtx);
1422 extern rtx get_pool_constant_for_function (struct function *, rtx);
1423 extern rtx simplify_subtraction (rtx);
1424
1425 /* In function.c */
1426 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1427 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1428 extern rtx assign_stack_temp_for_type (enum machine_mode,
1429 HOST_WIDE_INT, int, tree);
1430 extern rtx assign_temp (tree, int, int, int);
1431
1432 /* In emit-rtl.c */
1433 extern rtx emit_insn_before (rtx, rtx);
1434 extern rtx emit_insn_before_noloc (rtx, rtx);
1435 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1436 extern rtx emit_jump_insn_before (rtx, rtx);
1437 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1438 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1439 extern rtx emit_call_insn_before (rtx, rtx);
1440 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1441 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1442 extern rtx emit_barrier_before (rtx);
1443 extern rtx emit_label_before (rtx, rtx);
1444 extern rtx emit_note_before (int, rtx);
1445 extern rtx emit_insn_after (rtx, rtx);
1446 extern rtx emit_insn_after_noloc (rtx, rtx);
1447 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1448 extern rtx emit_jump_insn_after (rtx, rtx);
1449 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1450 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1451 extern rtx emit_call_insn_after (rtx, rtx);
1452 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1453 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1454 extern rtx emit_barrier_after (rtx);
1455 extern rtx emit_label_after (rtx, rtx);
1456 extern rtx emit_note_after (int, rtx);
1457 extern rtx emit_note_copy_after (rtx, rtx);
1458 extern rtx emit_insn (rtx);
1459 extern rtx emit_jump_insn (rtx);
1460 extern rtx emit_call_insn (rtx);
1461 extern rtx emit_label (rtx);
1462 extern rtx emit_barrier (void);
1463 extern rtx emit_note (int);
1464 extern rtx emit_note_copy (rtx);
1465 extern rtx emit_line_note (location_t);
1466 extern rtx make_insn_raw (rtx);
1467 extern void add_function_usage_to (rtx, rtx);
1468 extern rtx last_call_insn (void);
1469 extern rtx previous_insn (rtx);
1470 extern rtx next_insn (rtx);
1471 extern rtx prev_nonnote_insn (rtx);
1472 extern rtx next_nonnote_insn (rtx);
1473 extern rtx prev_real_insn (rtx);
1474 extern rtx next_real_insn (rtx);
1475 extern rtx prev_active_insn (rtx);
1476 extern rtx next_active_insn (rtx);
1477 extern int active_insn_p (rtx);
1478 extern rtx prev_label (rtx);
1479 extern rtx next_label (rtx);
1480 extern rtx skip_consecutive_labels (rtx);
1481 extern rtx next_cc0_user (rtx);
1482 extern rtx prev_cc0_setter (rtx);
1483
1484 /* In cfglayout.c */
1485 extern int insn_line (rtx);
1486 extern const char * insn_file (rtx);
1487 extern int locator_line (int);
1488 extern const char * locator_file (int);
1489 extern int prologue_locator, epilogue_locator;
1490
1491 /* In jump.c */
1492 extern enum rtx_code reverse_condition (enum rtx_code);
1493 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1494 extern enum rtx_code swap_condition (enum rtx_code);
1495 extern enum rtx_code unsigned_condition (enum rtx_code);
1496 extern enum rtx_code signed_condition (enum rtx_code);
1497 extern void mark_jump_label (rtx, rtx, int);
1498 extern void cleanup_barriers (void);
1499
1500 /* In jump.c */
1501 extern bool squeeze_notes (rtx *, rtx *);
1502 extern rtx delete_related_insns (rtx);
1503 extern void delete_jump (rtx);
1504 extern rtx get_label_before (rtx);
1505 extern rtx get_label_after (rtx);
1506 extern rtx follow_jumps (rtx);
1507
1508 /* In recog.c */
1509 extern rtx *find_constant_term_loc (rtx *);
1510
1511 /* In emit-rtl.c */
1512 extern rtx try_split (rtx, rtx, int);
1513 extern int split_branch_probability;
1514
1515 /* In unknown file */
1516 extern rtx split_insns (rtx, rtx);
1517
1518 /* In simplify-rtx.c */
1519 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1520 enum machine_mode);
1521 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1522 rtx);
1523 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1524 enum machine_mode, rtx, rtx, rtx);
1525 extern rtx simplify_const_relational_operation (enum rtx_code,
1526 enum machine_mode, rtx, rtx);
1527 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1528 enum machine_mode, rtx, rtx);
1529 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1530 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1531 enum machine_mode);
1532 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1533 enum machine_mode, rtx, rtx, rtx);
1534 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1535 enum machine_mode, rtx, rtx);
1536 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1537 unsigned int);
1538 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1539 unsigned int);
1540 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1541 extern rtx simplify_rtx (rtx);
1542 extern rtx avoid_constant_pool_reference (rtx);
1543 extern bool mode_signbit_p (enum machine_mode, rtx);
1544
1545 /* In regclass.c */
1546 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1547 bool);
1548
1549 /* In emit-rtl.c */
1550 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1551
1552 /* Functions in rtlanal.c */
1553
1554 /* Single set is implemented as macro for performance reasons. */
1555 #define single_set(I) (INSN_P (I) \
1556 ? (GET_CODE (PATTERN (I)) == SET \
1557 ? PATTERN (I) : single_set_1 (I)) \
1558 : NULL_RTX)
1559 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1560
1561 /* Structure used for passing data to REPLACE_LABEL. */
1562 typedef struct replace_label_data
1563 {
1564 rtx r1;
1565 rtx r2;
1566 bool update_label_nuses;
1567 } replace_label_data;
1568
1569 extern int rtx_addr_can_trap_p (rtx);
1570 extern bool nonzero_address_p (rtx);
1571 extern int rtx_unstable_p (rtx);
1572 extern int rtx_varies_p (rtx, int);
1573 extern int rtx_addr_varies_p (rtx, int);
1574 extern HOST_WIDE_INT get_integer_term (rtx);
1575 extern rtx get_related_value (rtx);
1576 extern int global_reg_mentioned_p (rtx);
1577 extern int reg_mentioned_p (rtx, rtx);
1578 extern int count_occurrences (rtx, rtx, int);
1579 extern int reg_referenced_p (rtx, rtx);
1580 extern int reg_used_between_p (rtx, rtx, rtx);
1581 extern int reg_set_between_p (rtx, rtx, rtx);
1582 extern int regs_set_between_p (rtx, rtx, rtx);
1583 extern int commutative_operand_precedence (rtx);
1584 extern int swap_commutative_operands_p (rtx, rtx);
1585 extern int modified_between_p (rtx, rtx, rtx);
1586 extern int no_labels_between_p (rtx, rtx);
1587 extern int modified_in_p (rtx, rtx);
1588 extern int reg_set_p (rtx, rtx);
1589 extern rtx single_set_2 (rtx, rtx);
1590 extern int multiple_sets (rtx);
1591 extern int set_noop_p (rtx);
1592 extern int noop_move_p (rtx);
1593 extern rtx find_last_value (rtx, rtx *, rtx, int);
1594 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1595 extern int reg_overlap_mentioned_p (rtx, rtx);
1596 extern rtx set_of (rtx, rtx);
1597 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1598 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1599 extern int dead_or_set_p (rtx, rtx);
1600 extern int dead_or_set_regno_p (rtx, unsigned int);
1601 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1602 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1603 extern rtx find_reg_equal_equiv_note (rtx);
1604 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1605 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1606 extern int pure_call_p (rtx);
1607 extern void remove_note (rtx, rtx);
1608 extern int side_effects_p (rtx);
1609 extern int volatile_refs_p (rtx);
1610 extern int volatile_insn_p (rtx);
1611 extern int may_trap_p (rtx);
1612 extern int inequality_comparisons_p (rtx);
1613 extern rtx replace_rtx (rtx, rtx, rtx);
1614 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1615 extern int replace_label (rtx *, void *);
1616 extern int rtx_referenced_p (rtx, rtx);
1617 extern bool tablejump_p (rtx, rtx *, rtx *);
1618 extern int computed_jump_p (rtx);
1619 typedef int (*rtx_function) (rtx *, void *);
1620 extern int for_each_rtx (rtx *, rtx_function, void *);
1621 extern rtx regno_use_in (unsigned int, rtx);
1622 extern int auto_inc_p (rtx);
1623 extern int in_expr_list_p (rtx, rtx);
1624 extern void remove_node_from_expr_list (rtx, rtx *);
1625 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1626 extern int loc_mentioned_in_p (rtx *, rtx);
1627 extern rtx find_first_parameter_load (rtx, rtx);
1628 extern bool keep_with_call_p (rtx);
1629 extern bool label_is_jump_target_p (rtx, rtx);
1630 extern int insn_rtx_cost (rtx);
1631
1632 /* Given an insn and condition, return a canonical description of
1633 the test being made. */
1634 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1635
1636 /* Given a JUMP_INSN, return a canonical description of the test
1637 being made. */
1638 extern rtx get_condition (rtx, rtx *, int, int);
1639
1640
1641 /* flow.c */
1642
1643 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1644
1645 /* lists.c */
1646
1647 void free_EXPR_LIST_list (rtx *);
1648 void free_INSN_LIST_list (rtx *);
1649 void free_EXPR_LIST_node (rtx);
1650 void free_INSN_LIST_node (rtx);
1651 rtx alloc_INSN_LIST (rtx, rtx);
1652 rtx alloc_EXPR_LIST (int, rtx, rtx);
1653
1654 /* regclass.c */
1655
1656 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1657 Always at least 3, since the combiner could put that many together
1658 and we want this to remain correct for all the remaining passes. */
1659
1660 extern int max_parallel;
1661
1662 /* Free up register info memory. */
1663 extern void free_reg_info (void);
1664
1665 /* recog.c */
1666 extern int asm_noperands (rtx);
1667 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1668 enum machine_mode *);
1669
1670 extern enum reg_class reg_preferred_class (int);
1671 extern enum reg_class reg_alternate_class (int);
1672
1673 extern void split_all_insns (int);
1674 extern void split_all_insns_noflow (void);
1675
1676 #define MAX_SAVED_CONST_INT 64
1677 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1678
1679 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1680 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1681 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1682 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1683 extern GTY(()) rtx const_true_rtx;
1684
1685 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1686
1687 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1688 same as VOIDmode. */
1689
1690 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1691
1692 /* Likewise, for the constants 1 and 2. */
1693
1694 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1695 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1696
1697 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1698 is used to represent the frame pointer. This is because the
1699 hard frame pointer and the automatic variables are separated by an amount
1700 that cannot be determined until after register allocation. We can assume
1701 that in this case ELIMINABLE_REGS will be defined, one action of which
1702 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1703 #ifndef HARD_FRAME_POINTER_REGNUM
1704 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1705 #endif
1706
1707 /* Index labels for global_rtl. */
1708 enum global_rtl_index
1709 {
1710 GR_PC,
1711 GR_CC0,
1712 GR_STACK_POINTER,
1713 GR_FRAME_POINTER,
1714 /* For register elimination to work properly these hard_frame_pointer_rtx,
1715 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1716 the same register. */
1717 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1718 GR_ARG_POINTER = GR_FRAME_POINTER,
1719 #endif
1720 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1721 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1722 #else
1723 GR_HARD_FRAME_POINTER,
1724 #endif
1725 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1726 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1727 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1728 #else
1729 GR_ARG_POINTER,
1730 #endif
1731 #endif
1732 GR_VIRTUAL_INCOMING_ARGS,
1733 GR_VIRTUAL_STACK_ARGS,
1734 GR_VIRTUAL_STACK_DYNAMIC,
1735 GR_VIRTUAL_OUTGOING_ARGS,
1736 GR_VIRTUAL_CFA,
1737
1738 GR_MAX
1739 };
1740
1741 /* Pointers to standard pieces of rtx are stored here. */
1742 extern GTY(()) rtx global_rtl[GR_MAX];
1743
1744 /* Standard pieces of rtx, to be substituted directly into things. */
1745 #define pc_rtx (global_rtl[GR_PC])
1746 #define cc0_rtx (global_rtl[GR_CC0])
1747
1748 /* All references to certain hard regs, except those created
1749 by allocating pseudo regs into them (when that's possible),
1750 go through these unique rtx objects. */
1751 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1752 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1753 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1754 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1755
1756 extern GTY(()) rtx pic_offset_table_rtx;
1757 extern GTY(()) rtx static_chain_rtx;
1758 extern GTY(()) rtx static_chain_incoming_rtx;
1759 extern GTY(()) rtx return_address_pointer_rtx;
1760
1761 /* Include the RTL generation functions. */
1762
1763 #ifndef GENERATOR_FILE
1764 #include "genrtl.h"
1765 #ifndef USE_MAPPED_LOCATION
1766 #undef gen_rtx_ASM_OPERANDS
1767 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1768 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1769 #endif
1770 #endif
1771
1772 /* There are some RTL codes that require special attention; the
1773 generation functions included above do the raw handling. If you
1774 add to this list, modify special_rtx in gengenrtl.c as well. */
1775
1776 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1777 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1778 extern rtx gen_raw_REG (enum machine_mode, int);
1779 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1780 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1781 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1782
1783 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1784
1785 /* Virtual registers are used during RTL generation to refer to locations into
1786 the stack frame when the actual location isn't known until RTL generation
1787 is complete. The routine instantiate_virtual_regs replaces these with
1788 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1789 a constant. */
1790
1791 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1792
1793 /* This points to the first word of the incoming arguments passed on the stack,
1794 either by the caller or by the callee when pretending it was passed by the
1795 caller. */
1796
1797 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1798
1799 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1800
1801 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1802 variable on the stack. Otherwise, it points to the first variable on
1803 the stack. */
1804
1805 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1806
1807 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1808
1809 /* This points to the location of dynamically-allocated memory on the stack
1810 immediately after the stack pointer has been adjusted by the amount
1811 desired. */
1812
1813 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1814
1815 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1816
1817 /* This points to the location in the stack at which outgoing arguments should
1818 be written when the stack is pre-pushed (arguments pushed using push
1819 insns always use sp). */
1820
1821 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1822
1823 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1824
1825 /* This points to the Canonical Frame Address of the function. This
1826 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1827 but is calculated relative to the arg pointer for simplicity; the
1828 frame pointer nor stack pointer are necessarily fixed relative to
1829 the CFA until after reload. */
1830
1831 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1832
1833 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1834
1835 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1836
1837 /* Nonzero if REGNUM is a pointer into the stack frame. */
1838 #define REGNO_PTR_FRAME_P(REGNUM) \
1839 ((REGNUM) == STACK_POINTER_REGNUM \
1840 || (REGNUM) == FRAME_POINTER_REGNUM \
1841 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1842 || (REGNUM) == ARG_POINTER_REGNUM \
1843 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1844 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1845
1846 /* REGNUM never really appearing in the INSN stream. */
1847 #define INVALID_REGNUM (~(unsigned int) 0)
1848
1849 extern rtx output_constant_def (tree, int);
1850 extern rtx lookup_constant_def (tree);
1851
1852 /* Nonzero after the second flow pass has completed.
1853 Set to 1 or 0 by toplev.c */
1854 extern int flow2_completed;
1855
1856 /* Nonzero after end of reload pass.
1857 Set to 1 or 0 by reload1.c. */
1858
1859 extern int reload_completed;
1860
1861 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1862 extern int epilogue_completed;
1863
1864 /* Set to 1 while reload_as_needed is operating.
1865 Required by some machines to handle any generated moves differently. */
1866
1867 extern int reload_in_progress;
1868
1869 /* If this is nonzero, we do not bother generating VOLATILE
1870 around volatile memory references, and we are willing to
1871 output indirect addresses. If cse is to follow, we reject
1872 indirect addresses so a useful potential cse is generated;
1873 if it is used only once, instruction combination will produce
1874 the same indirect address eventually. */
1875 extern int cse_not_expected;
1876
1877 /* Set to nonzero before life analysis to indicate that it is unsafe to
1878 generate any new pseudo registers. */
1879 extern int no_new_pseudos;
1880
1881 /* Translates rtx code to tree code, for those codes needed by
1882 REAL_ARITHMETIC. The function returns an int because the caller may not
1883 know what `enum tree_code' means. */
1884
1885 extern int rtx_to_tree_code (enum rtx_code);
1886
1887 /* In cse.c */
1888 extern int delete_trivially_dead_insns (rtx, int);
1889 extern int cse_main (rtx, int, FILE *);
1890 extern void cse_condition_code_reg (void);
1891 extern int exp_equiv_p (rtx, rtx, int, bool);
1892 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
1893
1894 /* In jump.c */
1895 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
1896 extern int condjump_p (rtx);
1897 extern int any_condjump_p (rtx);
1898 extern int any_uncondjump_p (rtx);
1899 extern rtx pc_set (rtx);
1900 extern rtx condjump_label (rtx);
1901 extern int simplejump_p (rtx);
1902 extern int returnjump_p (rtx);
1903 extern int onlyjump_p (rtx);
1904 extern int only_sets_cc0_p (rtx);
1905 extern int sets_cc0_p (rtx);
1906 extern int invert_jump_1 (rtx, rtx);
1907 extern int invert_jump (rtx, rtx, int);
1908 extern int rtx_renumbered_equal_p (rtx, rtx);
1909 extern int true_regnum (rtx);
1910 extern unsigned int reg_or_subregno (rtx);
1911 extern int redirect_jump_1 (rtx, rtx);
1912 extern int redirect_jump (rtx, rtx, int);
1913 extern void rebuild_jump_labels (rtx);
1914 extern enum rtx_code reversed_comparison_code (rtx, rtx);
1915 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
1916 rtx, rtx, rtx);
1917 extern void delete_for_peephole (rtx, rtx);
1918 extern int condjump_in_parallel_p (rtx);
1919 extern void purge_line_number_notes (rtx);
1920
1921 /* In emit-rtl.c. */
1922 extern int max_reg_num (void);
1923 extern int max_label_num (void);
1924 extern int get_first_label_num (void);
1925 extern void maybe_set_first_label_num (rtx);
1926 extern void delete_insns_since (rtx);
1927 extern void mark_reg_pointer (rtx, int);
1928 extern void mark_user_reg (rtx);
1929 extern void reset_used_flags (rtx);
1930 extern void set_used_flags (rtx);
1931 extern void reorder_insns (rtx, rtx, rtx);
1932 extern void reorder_insns_nobb (rtx, rtx, rtx);
1933 extern int get_max_uid (void);
1934 extern int in_sequence_p (void);
1935 extern void force_next_line_note (void);
1936 extern void init_emit (void);
1937 extern void init_emit_once (int);
1938 extern void push_topmost_sequence (void);
1939 extern void pop_topmost_sequence (void);
1940 extern void reverse_comparison (rtx);
1941 extern void set_new_first_and_last_insn (rtx, rtx);
1942 extern void unshare_all_rtl (void);
1943 extern void unshare_all_rtl_again (rtx);
1944 extern void unshare_all_rtl_in_chain (rtx);
1945 extern void verify_rtl_sharing (void);
1946 extern void set_first_insn (rtx);
1947 extern void set_last_insn (rtx);
1948 extern void link_cc0_insns (rtx);
1949 extern void add_insn (rtx);
1950 extern void add_insn_before (rtx, rtx);
1951 extern void add_insn_after (rtx, rtx);
1952 extern void remove_insn (rtx);
1953 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
1954 extern rtx emit (rtx);
1955 extern void renumber_insns (FILE *);
1956 extern void remove_unnecessary_notes (void);
1957 extern rtx delete_insn (rtx);
1958 extern rtx entry_of_function (void);
1959 extern void delete_insn_chain (rtx, rtx);
1960 extern rtx unlink_insn_chain (rtx, rtx);
1961 extern rtx delete_insn_and_edges (rtx);
1962 extern void delete_insn_chain_and_edges (rtx, rtx);
1963 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
1964 extern rtx gen_const_mem (enum machine_mode, rtx);
1965 extern bool validate_subreg (enum machine_mode, enum machine_mode,
1966 rtx, unsigned int);
1967
1968 /* In combine.c */
1969 extern int combine_instructions (rtx, unsigned int);
1970 extern unsigned int extended_count (rtx, enum machine_mode, int);
1971 extern rtx remove_death (unsigned int, rtx);
1972 extern void dump_combine_stats (FILE *);
1973 extern void dump_combine_total_stats (FILE *);
1974 /* In web.c */
1975 extern void web_main (void);
1976
1977 /* In sched-rgn.c. */
1978 extern void schedule_insns (FILE *);
1979
1980 /* In sched-ebb.c. */
1981 extern void schedule_ebbs (FILE *);
1982
1983 /* In haifa-sched.c. */
1984 extern void fix_sched_param (const char *, const char *);
1985
1986 /* In print-rtl.c */
1987 extern const char *print_rtx_head;
1988 extern void debug_rtx (rtx);
1989 extern void debug_rtx_list (rtx, int);
1990 extern void debug_rtx_range (rtx, rtx);
1991 extern rtx debug_rtx_find (rtx, int);
1992 extern void print_mem_expr (FILE *, tree);
1993 extern void print_rtl (FILE *, rtx);
1994 extern void print_simple_rtl (FILE *, rtx);
1995 extern int print_rtl_single (FILE *, rtx);
1996 extern void print_inline_rtx (FILE *, rtx, int);
1997
1998 /* In loop.c */
1999 extern void init_loop (void);
2000 extern void loop_optimize (rtx, FILE *, int);
2001
2002 /* In bt-load.c */
2003 extern void branch_target_load_optimize (bool);
2004
2005 /* In function.c */
2006 extern void reposition_prologue_and_epilogue_notes (rtx);
2007 extern void thread_prologue_and_epilogue_insns (rtx);
2008 extern int prologue_epilogue_contains (rtx);
2009 extern int sibcall_epilogue_contains (rtx);
2010 extern void mark_temp_addr_taken (rtx);
2011 extern void update_temp_slot_address (rtx, rtx);
2012
2013 /* In stmt.c */
2014 extern void expand_null_return (void);
2015 extern void expand_naked_return (void);
2016 extern void emit_jump (rtx);
2017
2018 /* In expr.c */
2019 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2020 unsigned int, int);
2021
2022 /* In flow.c */
2023 extern void recompute_reg_usage (rtx, int);
2024 extern int initialize_uninitialized_subregs (void);
2025 extern void delete_dead_jumptables (void);
2026 extern void print_rtl_with_bb (FILE *, rtx);
2027 extern void dump_flow_info (FILE *);
2028
2029 /* In expmed.c */
2030 extern void init_expmed (void);
2031 extern void expand_inc (rtx, rtx);
2032 extern void expand_dec (rtx, rtx);
2033 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2034 unsigned HOST_WIDE_INT, rtx, int, int);
2035
2036 /* In gcse.c */
2037 extern bool can_copy_p (enum machine_mode);
2038 extern rtx fis_get_condition (rtx);
2039 extern int gcse_main (rtx, FILE *);
2040 extern int bypass_jumps (FILE *);
2041
2042 /* In postreload-gcse.c */
2043 extern void gcse_after_reload_main (rtx);
2044
2045 /* In global.c */
2046 extern void mark_elimination (int, int);
2047 extern int global_alloc (FILE *);
2048 extern void dump_global_regs (FILE *);
2049 #ifdef HARD_CONST
2050 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2051 extern void retry_global_alloc (int, HARD_REG_SET);
2052 #endif
2053 extern void build_insn_chain (rtx);
2054
2055 /* In regclass.c */
2056 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2057 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2058 extern void globalize_reg (int);
2059 extern void init_reg_modes_once (void);
2060 extern void init_regs (void);
2061 extern void init_fake_stack_mems (void);
2062 extern void init_reg_sets (void);
2063 extern void regset_release_memory (void);
2064 extern void regclass_init (void);
2065 extern void regclass (rtx, int, FILE *);
2066 extern void reg_scan (rtx, unsigned int, int);
2067 extern void reg_scan_update (rtx, rtx, unsigned int);
2068 extern void fix_register (const char *, int, int);
2069 extern void init_subregs_of_mode (void);
2070 extern void record_subregs_of_mode (rtx);
2071 #ifdef HARD_CONST
2072 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2073 enum machine_mode, unsigned int);
2074 #endif
2075 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2076 enum machine_mode);
2077
2078 /* In regmove.c */
2079 extern void regmove_optimize (rtx, int, FILE *);
2080 extern void combine_stack_adjustments (void);
2081
2082 /* In reorg.c */
2083 extern void dbr_schedule (rtx, FILE *);
2084
2085 /* In local-alloc.c */
2086 extern void dump_local_alloc (FILE *);
2087 extern int local_alloc (void);
2088
2089 /* In reg-stack.c */
2090 extern bool reg_to_stack (FILE *);
2091
2092 /* In calls.c */
2093 enum libcall_type
2094 {
2095 LCT_NORMAL = 0,
2096 LCT_CONST = 1,
2097 LCT_PURE = 2,
2098 LCT_CONST_MAKE_BLOCK = 3,
2099 LCT_PURE_MAKE_BLOCK = 4,
2100 LCT_NORETURN = 5,
2101 LCT_THROW = 6,
2102 LCT_ALWAYS_RETURN = 7,
2103 LCT_RETURNS_TWICE = 8
2104 };
2105
2106 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2107 ...);
2108 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2109 enum machine_mode, int, ...);
2110
2111 /* In unroll.c */
2112 extern int set_dominates_use (int, int, int, rtx, rtx);
2113
2114 /* In varasm.c */
2115 extern int in_data_section (void);
2116 extern void init_varasm_once (void);
2117
2118 /* In rtl.c */
2119 extern void init_rtl (void);
2120 extern void traverse_md_constants (int (*) (void **, void *), void *);
2121 struct md_constant { char *name, *value; };
2122
2123 /* In read-rtl.c */
2124 extern int read_skip_spaces (FILE *);
2125 extern bool read_rtx (FILE *, rtx *, int *);
2126 extern const char *read_rtx_filename;
2127 extern int read_rtx_lineno;
2128
2129 /* In alias.c */
2130 extern void clear_reg_alias_info (rtx);
2131 extern rtx canon_rtx (rtx);
2132 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2133 extern rtx get_addr (rtx);
2134 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2135 int (*)(rtx, int));
2136 extern int read_dependence (rtx, rtx);
2137 extern int anti_dependence (rtx, rtx);
2138 extern int output_dependence (rtx, rtx);
2139 extern void mark_constant_function (void);
2140 extern void init_alias_once (void);
2141 extern void init_alias_analysis (void);
2142 extern void end_alias_analysis (void);
2143 extern bool memory_modified_in_insn_p (rtx, rtx);
2144 extern rtx find_base_term (rtx);
2145 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2146 extern rtx get_reg_known_value (unsigned int);
2147 extern bool get_reg_known_equiv_p (unsigned int);
2148
2149 #ifdef STACK_REGS
2150 extern int stack_regs_mentioned (rtx insn);
2151 #endif
2152
2153 /* In toplev.c */
2154 extern GTY(()) rtx stack_limit_rtx;
2155
2156 /* In regrename.c */
2157 extern void regrename_optimize (void);
2158 extern void copyprop_hardreg_forward (void);
2159
2160 /* In ifcvt.c */
2161 extern void if_convert (int);
2162
2163 /* In predict.c */
2164 extern void invert_br_probabilities (rtx);
2165 extern bool expensive_function_p (int);
2166 /* In tracer.c */
2167 extern void tracer (unsigned int);
2168
2169 /* In var-tracking.c */
2170 extern void variable_tracking_main (void);
2171
2172 /* In stor-layout.c. */
2173 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2174 rtx *, rtx *);
2175
2176 /* In loop-unswitch.c */
2177 extern rtx reversed_condition (rtx);
2178 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2179
2180 /* In loop-iv.c */
2181 extern rtx canon_condition (rtx);
2182 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2183
2184 /* In ra.c. */
2185 extern void reg_alloc (void);
2186
2187 /* In modulo-sched.c. */
2188 extern void sms_schedule (FILE *);
2189 \f
2190 struct rtl_hooks
2191 {
2192 rtx (*gen_lowpart) (enum machine_mode, rtx);
2193 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2194 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2195 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2196 unsigned int, unsigned int *);
2197
2198 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2199 };
2200
2201 /* Each pass can provide its own. */
2202 extern struct rtl_hooks rtl_hooks;
2203
2204 /* ... but then it has to restore these. */
2205 extern const struct rtl_hooks general_rtl_hooks;
2206
2207 /* Keep this for the nonce. */
2208 #define gen_lowpart rtl_hooks.gen_lowpart
2209
2210 #endif /* ! GCC_RTL_H */
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