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* rtl.h (SUBREG_PROMOTED_UNSIGNED_P): Add cast to int.
[official-gcc.git] / gcc / rtl.h
blob637c227ec1245be2bc3003ebda9d4f2df843c2c9
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
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 #include "real.h"
29 #include "vec.h"
30 #include "fixed-value.h"
31 #include "alias.h"
32
33 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
34 #undef FLOAT /* Likewise. */
35 #undef ABS /* Likewise. */
36 #undef PC /* Likewise. */
37
38 /* Value used by some passes to "recognize" noop moves as valid
39 instructions. */
40 #define NOOP_MOVE_INSN_CODE INT_MAX
41
42 /* Register Transfer Language EXPRESSIONS CODES */
43
44 #define RTX_CODE enum rtx_code
45 enum rtx_code {
46
47 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
48 #include "rtl.def" /* rtl expressions are documented here */
49 #undef DEF_RTL_EXPR
50
51 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
52 NUM_RTX_CODE.
53 Assumes default enum value assignment. */
54
55 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
56 /* The cast here, saves many elsewhere. */
57
58 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59
60 enum rtx_class {
61 /* We check bit 0-1 of some rtx class codes in the predicates below. */
62
63 /* Bit 0 = comparison if 0, arithmetic is 1
64 Bit 1 = 1 if commutative. */
65 RTX_COMPARE, /* 0 */
66 RTX_COMM_COMPARE,
67 RTX_BIN_ARITH,
68 RTX_COMM_ARITH,
69
70 /* Must follow the four preceding values. */
71 RTX_UNARY, /* 4 */
72
73 RTX_EXTRA,
74 RTX_MATCH,
75 RTX_INSN,
76
77 /* Bit 0 = 1 if constant. */
78 RTX_OBJ, /* 8 */
79 RTX_CONST_OBJ,
80
81 RTX_TERNARY,
82 RTX_BITFIELD_OPS,
83 RTX_AUTOINC
84 };
85
86 #define RTX_OBJ_MASK (~1)
87 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
88 #define RTX_COMPARE_MASK (~1)
89 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
90 #define RTX_ARITHMETIC_MASK (~1)
91 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
92 #define RTX_BINARY_MASK (~3)
93 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
94 #define RTX_COMMUTATIVE_MASK (~2)
95 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
96 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
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_code_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 GTY(()) mem_attrs
143 {
144 tree expr; /* expr corresponding to MEM. */
145 rtx offset; /* Offset from start of DECL, as CONST_INT. */
146 rtx size; /* Size in bytes, as a CONST_INT. */
147 alias_set_type alias; /* Memory alias set. */
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. Note that the OFFSET field is calculated
153 in the same way as for mem_attrs, rather than in the same way as a
154 SUBREG_BYTE. For example, if a big-endian target stores a byte
155 object in the low part of a 4-byte register, the OFFSET field
156 will be -3 rather than 0. */
157
158 typedef struct GTY(()) reg_attrs {
159 tree decl; /* decl corresponding to REG. */
160 HOST_WIDE_INT offset; /* Offset from start of DECL. */
161 } reg_attrs;
162
163 /* Common union for an element of an rtx. */
164
165 union rtunion_def
166 {
167 int rt_int;
168 unsigned int rt_uint;
169 const char *rt_str;
170 rtx rt_rtx;
171 rtvec rt_rtvec;
172 enum machine_mode rt_type;
173 addr_diff_vec_flags rt_addr_diff_vec_flags;
174 struct cselib_val_struct *rt_cselib;
175 struct bitmap_head_def *rt_bit;
176 tree rt_tree;
177 struct basic_block_def *rt_bb;
178 mem_attrs *rt_mem;
179 reg_attrs *rt_reg;
180 struct constant_descriptor_rtx *rt_constant;
181 };
182 typedef union rtunion_def rtunion;
183
184 /* This structure remembers the position of a SYMBOL_REF within an
185 object_block structure. A SYMBOL_REF only provides this information
186 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
187 struct GTY(()) block_symbol {
188 /* The usual SYMBOL_REF fields. */
189 rtunion GTY ((skip)) fld[3];
190
191 /* The block that contains this object. */
192 struct object_block *block;
193
194 /* The offset of this object from the start of its block. It is negative
195 if the symbol has not yet been assigned an offset. */
196 HOST_WIDE_INT offset;
197 };
198
199 DEF_VEC_P(rtx);
200 DEF_VEC_ALLOC_P(rtx,heap);
201 DEF_VEC_ALLOC_P(rtx,gc);
202
203 /* Describes a group of objects that are to be placed together in such
204 a way that their relative positions are known. */
205 struct GTY(()) object_block {
206 /* The section in which these objects should be placed. */
207 section *sect;
208
209 /* The alignment of the first object, measured in bits. */
210 unsigned int alignment;
211
212 /* The total size of the objects, measured in bytes. */
213 HOST_WIDE_INT size;
214
215 /* The SYMBOL_REFs for each object. The vector is sorted in
216 order of increasing offset and the following conditions will
217 hold for each element X:
218
219 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
220 !SYMBOL_REF_ANCHOR_P (X)
221 SYMBOL_REF_BLOCK (X) == [address of this structure]
222 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
223 VEC(rtx,gc) *objects;
224
225 /* All the anchor SYMBOL_REFs used to address these objects, sorted
226 in order of increasing offset, and then increasing TLS model.
227 The following conditions will hold for each element X in this vector:
228
229 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
230 SYMBOL_REF_ANCHOR_P (X)
231 SYMBOL_REF_BLOCK (X) == [address of this structure]
232 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
233 VEC(rtx,gc) *anchors;
234 };
235
236 /* RTL expression ("rtx"). */
237
238 struct GTY((chain_next ("RTX_NEXT (&%h)"),
239 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
240 /* The kind of expression this is. */
241 ENUM_BITFIELD(rtx_code) code: 16;
242
243 /* The kind of value the expression has. */
244 ENUM_BITFIELD(machine_mode) mode : 8;
245
246 /* 1 in a MEM if we should keep the alias set for this mem unchanged
247 when we access a component.
248 1 in a CALL_INSN if it is a sibling call.
249 1 in a SET that is for a return.
250 In a CODE_LABEL, part of the two-bit alternate entry field. */
251 unsigned int jump : 1;
252 /* In a CODE_LABEL, part of the two-bit alternate entry field.
253 1 in a MEM if it cannot trap.
254 1 in a CALL_INSN logically equivalent to
255 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
256 unsigned int call : 1;
257 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
258 1 in a SUBREG if it references an unsigned object whose mode has been
259 from a promoted to a wider mode.
260 1 in a SYMBOL_REF if it addresses something in the per-function
261 constants pool.
262 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
263 1 in a NOTE, or EXPR_LIST for a const call.
264 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
265 unsigned int unchanging : 1;
266 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
267 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
268 if it has been deleted.
269 1 in a REG expression if corresponds to a variable declared by the user,
270 0 for an internally generated temporary.
271 1 in a SUBREG with a negative value.
272 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
273 non-local label.
274 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
275 unsigned int volatil : 1;
276 /* 1 in a MEM referring to a field of an aggregate.
277 0 if the MEM was a variable or the result of a * operator in C;
278 1 if it was the result of a . or -> operator (on a struct) in C.
279 1 in a REG if the register is used only in exit code a loop.
280 1 in a SUBREG expression if was generated from a variable with a
281 promoted mode.
282 1 in a CODE_LABEL if the label is used for nonlocal gotos
283 and must not be deleted even if its count is zero.
284 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
285 together with the preceding insn. Valid only within sched.
286 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
287 from the target of a branch. Valid from reorg until end of compilation;
288 cleared before used. */
289 unsigned int in_struct : 1;
290 /* At the end of RTL generation, 1 if this rtx is used. This is used for
291 copying shared structure. See `unshare_all_rtl'.
292 In a REG, this is not needed for that purpose, and used instead
293 in `leaf_renumber_regs_insn'.
294 1 in a SYMBOL_REF, means that emit_library_call
295 has used it as the function. */
296 unsigned int used : 1;
297 /* 1 in an INSN or a SET if this rtx is related to the call frame,
298 either changing how we compute the frame address or saving and
299 restoring registers in the prologue and epilogue.
300 1 in a REG or MEM if it is a pointer.
301 1 in a SYMBOL_REF if it addresses something in the per-function
302 constant string pool. */
303 unsigned frame_related : 1;
304 /* 1 in a REG or PARALLEL that is the current function's return value.
305 1 in a MEM if it refers to a scalar.
306 1 in a SYMBOL_REF for a weak symbol.
307 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
308 unsigned return_val : 1;
309
310 /* The first element of the operands of this rtx.
311 The number of operands and their types are controlled
312 by the `code' field, according to rtl.def. */
313 union u {
314 rtunion fld[1];
315 HOST_WIDE_INT hwint[1];
316 struct block_symbol block_sym;
317 struct real_value rv;
318 struct fixed_value fv;
319 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
320 };
321
322 /* The size in bytes of an rtx header (code, mode and flags). */
323 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
324
325 /* The size in bytes of an rtx with code CODE. */
326 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
327
328 #define NULL_RTX (rtx) 0
329
330 /* The "next" and "previous" RTX, relative to this one. */
331
332 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
333 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
334
335 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
336 */
337 #define RTX_PREV(X) ((INSN_P (X) \
338 || NOTE_P (X) \
339 || BARRIER_P (X) \
340 || LABEL_P (X)) \
341 && PREV_INSN (X) != NULL \
342 && NEXT_INSN (PREV_INSN (X)) == X \
343 ? PREV_INSN (X) : NULL)
344
345 /* Define macros to access the `code' field of the rtx. */
346
347 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
348 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
349
350 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
351 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
352
353 /* RTL vector. These appear inside RTX's when there is a need
354 for a variable number of things. The principle use is inside
355 PARALLEL expressions. */
356
357 struct GTY(()) rtvec_def {
358 int num_elem; /* number of elements */
359 rtx GTY ((length ("%h.num_elem"))) elem[1];
360 };
361
362 #define NULL_RTVEC (rtvec) 0
363
364 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
365 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
366
367 /* Predicate yielding nonzero iff X is an rtx for a register. */
368 #define REG_P(X) (GET_CODE (X) == REG)
369
370 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
371 #define MEM_P(X) (GET_CODE (X) == MEM)
372
373 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
374 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
375
376 /* Predicate yielding nonzero iff X is a label insn. */
377 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
378
379 /* Predicate yielding nonzero iff X is a jump insn. */
380 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
381
382 /* Predicate yielding nonzero iff X is a call insn. */
383 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
384
385 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
386 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
387
388 /* Predicate yielding nonzero iff X is a real insn. */
389 #define INSN_P(X) \
390 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
391
392 /* Predicate yielding nonzero iff X is a note insn. */
393 #define NOTE_P(X) (GET_CODE (X) == NOTE)
394
395 /* Predicate yielding nonzero iff X is a barrier insn. */
396 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
397
398 /* Predicate yielding nonzero iff X is a data for a jump table. */
399 #define JUMP_TABLE_DATA_P(INSN) \
400 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
401 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
402
403 /* 1 if X is a unary operator. */
404
405 #define UNARY_P(X) \
406 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
407
408 /* 1 if X is a binary operator. */
409
410 #define BINARY_P(X) \
411 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
412
413 /* 1 if X is an arithmetic operator. */
414
415 #define ARITHMETIC_P(X) \
416 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
417 == RTX_ARITHMETIC_RESULT)
418
419 /* 1 if X is an arithmetic operator. */
420
421 #define COMMUTATIVE_ARITH_P(X) \
422 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
423
424 /* 1 if X is a commutative arithmetic operator or a comparison operator.
425 These two are sometimes selected together because it is possible to
426 swap the two operands. */
427
428 #define SWAPPABLE_OPERANDS_P(X) \
429 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
430 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
431 | (1 << RTX_COMPARE)))
432
433 /* 1 if X is a non-commutative operator. */
434
435 #define NON_COMMUTATIVE_P(X) \
436 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
437 == RTX_NON_COMMUTATIVE_RESULT)
438
439 /* 1 if X is a commutative operator on integers. */
440
441 #define COMMUTATIVE_P(X) \
442 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
443 == RTX_COMMUTATIVE_RESULT)
444
445 /* 1 if X is a relational operator. */
446
447 #define COMPARISON_P(X) \
448 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
449
450 /* 1 if X is a constant value that is an integer. */
451
452 #define CONSTANT_P(X) \
453 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
454
455 /* 1 if X can be used to represent an object. */
456 #define OBJECT_P(X) \
457 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
458
459 /* General accessor macros for accessing the fields of an rtx. */
460
461 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
462 /* The bit with a star outside the statement expr and an & inside is
463 so that N can be evaluated only once. */
464 #define RTL_CHECK1(RTX, N, C1) __extension__ \
465 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
466 const enum rtx_code _code = GET_CODE (_rtx); \
467 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
468 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
469 __FUNCTION__); \
470 if (GET_RTX_FORMAT(_code)[_n] != C1) \
471 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
472 __FUNCTION__); \
473 &_rtx->u.fld[_n]; }))
474
475 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
476 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
477 const enum rtx_code _code = GET_CODE (_rtx); \
478 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
479 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
480 __FUNCTION__); \
481 if (GET_RTX_FORMAT(_code)[_n] != C1 \
482 && GET_RTX_FORMAT(_code)[_n] != C2) \
483 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
484 __FUNCTION__); \
485 &_rtx->u.fld[_n]; }))
486
487 #define RTL_CHECKC1(RTX, N, C) __extension__ \
488 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
489 if (GET_CODE (_rtx) != (C)) \
490 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
491 __FUNCTION__); \
492 &_rtx->u.fld[_n]; }))
493
494 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
495 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
496 const enum rtx_code _code = GET_CODE (_rtx); \
497 if (_code != (C1) && _code != (C2)) \
498 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
499 __FUNCTION__); \
500 &_rtx->u.fld[_n]; }))
501
502 #define RTVEC_ELT(RTVEC, I) __extension__ \
503 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
504 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
505 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
506 __FUNCTION__); \
507 &_rtvec->elem[_i]; }))
508
509 #define XWINT(RTX, N) __extension__ \
510 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
511 const enum rtx_code _code = GET_CODE (_rtx); \
512 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
513 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
514 __FUNCTION__); \
515 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
516 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
517 __FUNCTION__); \
518 &_rtx->u.hwint[_n]; }))
519
520 #define XCWINT(RTX, N, C) __extension__ \
521 (*({ __typeof (RTX) const _rtx = (RTX); \
522 if (GET_CODE (_rtx) != (C)) \
523 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
524 __FUNCTION__); \
525 &_rtx->u.hwint[N]; }))
526
527 #define XCMWINT(RTX, N, C, M) __extension__ \
528 (*({ __typeof (RTX) const _rtx = (RTX); \
529 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
530 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
531 __LINE__, __FUNCTION__); \
532 &_rtx->u.hwint[N]; }))
533
534 #define XCNMPRV(RTX, C, M) __extension__ \
535 ({ __typeof (RTX) const _rtx = (RTX); \
536 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
537 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
538 __LINE__, __FUNCTION__); \
539 &_rtx->u.rv; })
540
541 #define XCNMPFV(RTX, C, M) __extension__ \
542 ({ __typeof (RTX) const _rtx = (RTX); \
543 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
544 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
545 __LINE__, __FUNCTION__); \
546 &_rtx->u.fv; })
547
548 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
549 ({ __typeof (RTX) const _symbol = (RTX); \
550 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
551 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
552 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
553 __FUNCTION__); \
554 &_symbol->u.block_sym; })
555
556 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
557 const char *)
558 ATTRIBUTE_NORETURN;
559 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
560 const char *)
561 ATTRIBUTE_NORETURN;
562 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
563 int, const char *)
564 ATTRIBUTE_NORETURN;
565 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
566 int, const char *)
567 ATTRIBUTE_NORETURN;
568 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
569 const char *, int, const char *)
570 ATTRIBUTE_NORETURN;
571 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
572 bool, const char *, int, const char *)
573 ATTRIBUTE_NORETURN;
574 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
575 ATTRIBUTE_NORETURN;
576 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
577 const char *)
578 ATTRIBUTE_NORETURN;
579
580 #else /* not ENABLE_RTL_CHECKING */
581
582 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
583 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
584 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
585 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
586 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
587 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
588 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
589 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
590 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
591 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
592 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
593 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
594
595 #endif
596
597 /* General accessor macros for accessing the flags of an rtx. */
598
599 /* Access an individual rtx flag, with no checking of any kind. */
600 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
601
602 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
603 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
604 ({ __typeof (RTX) const _rtx = (RTX); \
605 if (GET_CODE(_rtx) != C1) \
606 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
607 __FUNCTION__); \
608 _rtx; })
609
610 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
611 ({ __typeof (RTX) const _rtx = (RTX); \
612 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
613 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
614 __FUNCTION__); \
615 _rtx; })
616
617 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
618 ({ __typeof (RTX) const _rtx = (RTX); \
619 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
620 && GET_CODE(_rtx) != C3) \
621 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
622 __FUNCTION__); \
623 _rtx; })
624
625 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
626 ({ __typeof (RTX) const _rtx = (RTX); \
627 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
628 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
629 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
630 __FUNCTION__); \
631 _rtx; })
632
633 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
634 ({ __typeof (RTX) const _rtx = (RTX); \
635 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
636 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
637 && GET_CODE(_rtx) != C5) \
638 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
639 __FUNCTION__); \
640 _rtx; })
641
642 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
643 __extension__ \
644 ({ __typeof (RTX) const _rtx = (RTX); \
645 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
646 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
647 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
648 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
649 __FUNCTION__); \
650 _rtx; })
651
652 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
653 __extension__ \
654 ({ __typeof (RTX) const _rtx = (RTX); \
655 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
656 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
657 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
658 && GET_CODE(_rtx) != C7) \
659 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
660 __FUNCTION__); \
661 _rtx; })
662
663 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
664 __extension__ \
665 ({ __typeof (RTX) const _rtx = (RTX); \
666 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
667 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
668 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
669 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
670 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
671 __FUNCTION__); \
672 _rtx; })
673
674 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
675 int, const char *)
676 ATTRIBUTE_NORETURN
677 ;
678
679 #else /* not ENABLE_RTL_FLAG_CHECKING */
680
681 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
682 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
683 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
684 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
685 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
686 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
687 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
688 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
689 #endif
690
691 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
692 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
693 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
694 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
695 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
696 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
697 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
698 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
699 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
700
701 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
702 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
703
704 /* These are like XINT, etc. except that they expect a '0' field instead
705 of the normal type code. */
706
707 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
708 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
709 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
710 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
711 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
712 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
713 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
714 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
715 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
716 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
717 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
718 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
719 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
720 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
721
722 /* Access a '0' field with any type. */
723 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
724
725 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
726 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
727 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
728 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
729 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
730 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
731 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
732 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
733 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
734 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
735
736 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
737 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
738
739 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
740 \f
741 /* ACCESS MACROS for particular fields of insns. */
742
743 /* Holds a unique number for each insn.
744 These are not necessarily sequentially increasing. */
745 #define INSN_UID(INSN) XINT (INSN, 0)
746
747 /* Chain insns together in sequence. */
748 #define PREV_INSN(INSN) XEXP (INSN, 1)
749 #define NEXT_INSN(INSN) XEXP (INSN, 2)
750
751 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
752 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
753 /* LOCATION of an RTX if relevant. */
754 #define RTL_LOCATION(X) (INSN_P (X) ? \
755 locator_location (INSN_LOCATOR (x)) \
756 : UNKNOWN_LOCATION)
757 /* LOCATION of current INSN. */
758 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
759 /* The body of an insn. */
760 #define PATTERN(INSN) XEXP (INSN, 5)
761
762 /* Code number of instruction, from when it was recognized.
763 -1 means this instruction has not been recognized yet. */
764 #define INSN_CODE(INSN) XINT (INSN, 6)
765
766 #define RTX_FRAME_RELATED_P(RTX) \
767 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
768 JUMP_INSN, BARRIER, SET)->frame_related)
769
770 /* 1 if RTX is an insn that has been deleted. */
771 #define INSN_DELETED_P(RTX) \
772 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
773 CODE_LABEL, BARRIER, NOTE)->volatil)
774
775 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
776 TREE_READONLY. */
777 #define RTL_CONST_CALL_P(RTX) \
778 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
779
780 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
781 DECL_PURE_P. */
782 #define RTL_PURE_CALL_P(RTX) \
783 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
784
785 /* 1 if RTX is a call to a const or pure function. */
786 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
787 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
788
789 /* 1 if RTX is a call to a looping const or pure function. Built from
790 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
791 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
792 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
793
794 /* 1 if RTX is a call_insn for a sibling call. */
795 #define SIBLING_CALL_P(RTX) \
796 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
797
798 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
799 #define INSN_ANNULLED_BRANCH_P(RTX) \
800 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
801
802 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
803 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
804 executed if the branch is taken. For annulled branches with this bit
805 clear, the insn should be executed only if the branch is not taken. */
806 #define INSN_FROM_TARGET_P(RTX) \
807 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
808
809 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
810 See the comments for ADDR_DIFF_VEC in rtl.def. */
811 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
812
813 /* In a VALUE, the value cselib has assigned to RTX.
814 This is a "struct cselib_val_struct", see cselib.h. */
815 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
816
817 /* Holds a list of notes on what this insn does to various REGs.
818 It is a chain of EXPR_LIST rtx's, where the second operand is the
819 chain pointer and the first operand is the REG being described.
820 The mode field of the EXPR_LIST contains not a real machine mode
821 but a value from enum reg_note. */
822 #define REG_NOTES(INSN) XEXP(INSN, 7)
823
824 enum reg_note
825 {
826 #define DEF_REG_NOTE(NAME) NAME,
827 #include "reg-notes.def"
828 #undef DEF_REG_NOTE
829 REG_NOTE_MAX
830 };
831
832 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
833 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
834 #define PUT_REG_NOTE_KIND(LINK, KIND) \
835 PUT_MODE (LINK, (enum machine_mode) (KIND))
836
837 /* Names for REG_NOTE's in EXPR_LIST insn's. */
838
839 extern const char * const reg_note_name[];
840 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
841
842 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
843 USE and CLOBBER expressions.
844 USE expressions list the registers filled with arguments that
845 are passed to the function.
846 CLOBBER expressions document the registers explicitly clobbered
847 by this CALL_INSN.
848 Pseudo registers can not be mentioned in this list. */
849 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
850
851 /* The label-number of a code-label. The assembler label
852 is made from `L' and the label-number printed in decimal.
853 Label numbers are unique in a compilation. */
854 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
855
856 /* In a NOTE that is a line number, this is a string for the file name that the
857 line is in. We use the same field to record block numbers temporarily in
858 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
859 between ints and pointers if we use a different macro for the block number.)
860 */
861
862 /* Opaque data. */
863 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
864 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
865 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
866 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
867 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
868 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
869 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
870
871 /* In a NOTE that is a line number, this is the line number.
872 Other kinds of NOTEs are identified by negative numbers here. */
873 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
874
875 /* Nonzero if INSN is a note marking the beginning of a basic block. */
876 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
877 (GET_CODE (INSN) == NOTE \
878 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
879
880 /* Variable declaration and the location of a variable. */
881 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
882 0, VAR_LOCATION))
883 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
884 1, VAR_LOCATION))
885
886 /* Initialization status of the variable in the location. Status
887 can be unknown, uninitialized or initialized. See enumeration
888 type below. */
889 #define NOTE_VAR_LOCATION_STATUS(INSN) \
890 ((enum var_init_status) (XCINT (XCEXP (INSN, 4, NOTE), 2, VAR_LOCATION)))
891
892 /* Possible initialization status of a variable. When requested
893 by the user, this information is tracked and recorded in the DWARF
894 debug information, along with the variable's location. */
895 enum var_init_status
896 {
897 VAR_INIT_STATUS_UNKNOWN,
898 VAR_INIT_STATUS_UNINITIALIZED,
899 VAR_INIT_STATUS_INITIALIZED
900 };
901
902 /* Codes that appear in the NOTE_KIND field for kinds of notes
903 that are not line numbers. These codes are all negative.
904
905 Notice that we do not try to use zero here for any of
906 the special note codes because sometimes the source line
907 actually can be zero! This happens (for example) when we
908 are generating code for the per-translation-unit constructor
909 and destructor routines for some C++ translation unit. */
910
911 enum insn_note
912 {
913 #define DEF_INSN_NOTE(NAME) NAME,
914 #include "insn-notes.def"
915 #undef DEF_INSN_NOTE
916
917 NOTE_INSN_MAX
918 };
919
920 /* Names for NOTE insn's other than line numbers. */
921
922 extern const char * const note_insn_name[NOTE_INSN_MAX];
923 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
924 (note_insn_name[(NOTE_CODE)])
925
926 /* The name of a label, in case it corresponds to an explicit label
927 in the input source code. */
928 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
929
930 /* In jump.c, each label contains a count of the number
931 of LABEL_REFs that point at it, so unused labels can be deleted. */
932 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
933
934 /* Labels carry a two-bit field composed of the ->jump and ->call
935 bits. This field indicates whether the label is an alternate
936 entry point, and if so, what kind. */
937 enum label_kind
938 {
939 LABEL_NORMAL = 0, /* ordinary label */
940 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
941 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
942 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
943 };
944
945 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
946
947 /* Retrieve the kind of LABEL. */
948 #define LABEL_KIND(LABEL) __extension__ \
949 ({ __typeof (LABEL) const _label = (LABEL); \
950 if (GET_CODE (_label) != CODE_LABEL) \
951 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
952 __FUNCTION__); \
953 (enum label_kind) ((_label->jump << 1) | _label->call); })
954
955 /* Set the kind of LABEL. */
956 #define SET_LABEL_KIND(LABEL, KIND) do { \
957 __typeof (LABEL) const _label = (LABEL); \
958 const unsigned int _kind = (KIND); \
959 if (GET_CODE (_label) != CODE_LABEL) \
960 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
961 __FUNCTION__); \
962 _label->jump = ((_kind >> 1) & 1); \
963 _label->call = (_kind & 1); \
964 } while (0)
965
966 #else
967
968 /* Retrieve the kind of LABEL. */
969 #define LABEL_KIND(LABEL) \
970 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
971
972 /* Set the kind of LABEL. */
973 #define SET_LABEL_KIND(LABEL, KIND) do { \
974 rtx const _label = (LABEL); \
975 const unsigned int _kind = (KIND); \
976 _label->jump = ((_kind >> 1) & 1); \
977 _label->call = (_kind & 1); \
978 } while (0)
979
980 #endif /* rtl flag checking */
981
982 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
983
984 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
985 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
986 be decremented and possibly the label can be deleted. */
987 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
988
989 /* Once basic blocks are found, each CODE_LABEL starts a chain that
990 goes through all the LABEL_REFs that jump to that label. The chain
991 eventually winds up at the CODE_LABEL: it is circular. */
992 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
993 \f
994 /* For a REG rtx, REGNO extracts the register number. REGNO can only
995 be used on RHS. Use SET_REGNO to change the value. */
996 #define REGNO(RTX) (rhs_regno(RTX))
997 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
998
999 /* ORIGINAL_REGNO holds the number the register originally had; for a
1000 pseudo register turned into a hard reg this will hold the old pseudo
1001 register number. */
1002 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1003
1004 /* Force the REGNO macro to only be used on the lhs. */
1005 static inline unsigned int
1006 rhs_regno (const_rtx x)
1007 {
1008 return XCUINT (x, 0, REG);
1009 }
1010
1011
1012
1013 /* 1 if RTX is a reg or parallel that is the current function's return
1014 value. */
1015 #define REG_FUNCTION_VALUE_P(RTX) \
1016 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1017
1018 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1019 #define REG_USERVAR_P(RTX) \
1020 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1021
1022 /* 1 if RTX is a reg that holds a pointer value. */
1023 #define REG_POINTER(RTX) \
1024 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1025
1026 /* 1 if RTX is a mem that holds a pointer value. */
1027 #define MEM_POINTER(RTX) \
1028 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1029
1030 /* 1 if the given register REG corresponds to a hard register. */
1031 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1032
1033 /* 1 if the given register number REG_NO corresponds to a hard register. */
1034 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1035
1036 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1037 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1038 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1039
1040 /* For a CONST_DOUBLE:
1041 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1042 low-order word and ..._HIGH the high-order.
1043 For a float, there is a REAL_VALUE_TYPE structure, and
1044 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1045 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1046 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1047 #define CONST_DOUBLE_REAL_VALUE(r) \
1048 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1049
1050 #define CONST_FIXED_VALUE(r) \
1051 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1052 #define CONST_FIXED_VALUE_HIGH(r) \
1053 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1054 #define CONST_FIXED_VALUE_LOW(r) \
1055 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1056
1057 /* For a CONST_VECTOR, return element #n. */
1058 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1059
1060 /* For a CONST_VECTOR, return the number of elements in a vector. */
1061 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1062
1063 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1064 SUBREG_BYTE extracts the byte-number. */
1065
1066 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1067 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1068
1069 /* in rtlanal.c */
1070 /* Return the right cost to give to an operation
1071 to make the cost of the corresponding register-to-register instruction
1072 N times that of a fast register-to-register instruction. */
1073 #define COSTS_N_INSNS(N) ((N) * 4)
1074
1075 /* Maximum cost of an rtl expression. This value has the special meaning
1076 not to use an rtx with this cost under any circumstances. */
1077 #define MAX_COST INT_MAX
1078
1079 extern void init_rtlanal (void);
1080 extern int rtx_cost (rtx, enum rtx_code, bool);
1081 extern int address_cost (rtx, enum machine_mode, bool);
1082 extern unsigned int subreg_lsb (const_rtx);
1083 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1084 unsigned int);
1085 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1086 unsigned int, enum machine_mode);
1087 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1088 unsigned int, enum machine_mode);
1089 extern unsigned int subreg_regno (const_rtx);
1090 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1091 unsigned int, enum machine_mode);
1092 extern unsigned int subreg_nregs (const_rtx);
1093 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1094 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1095 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1096 extern bool constant_pool_constant_p (rtx);
1097 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1098
1099
1100 /* 1 if RTX is a subreg containing a reg that is already known to be
1101 sign- or zero-extended from the mode of the subreg to the mode of
1102 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1103 extension.
1104
1105 When used as a LHS, is means that this extension must be done
1106 when assigning to SUBREG_REG. */
1107
1108 #define SUBREG_PROMOTED_VAR_P(RTX) \
1109 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1110
1111 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1112 do { \
1113 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1114 if ((VAL) < 0) \
1115 _rtx->volatil = 1; \
1116 else { \
1117 _rtx->volatil = 0; \
1118 _rtx->unchanging = (VAL); \
1119 } \
1120 } while (0)
1121 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1122 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1123 ? -1 : (int) (RTX)->unchanging)
1124
1125 /* Access various components of an ASM_OPERANDS rtx. */
1126
1127 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1128 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1129 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1130 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1131 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1132 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1133 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1134 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1135 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1136 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1137 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1138 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1139 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1140 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1141 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1142
1143 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1144 #define MEM_READONLY_P(RTX) \
1145 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1146
1147 /* 1 if RTX is a mem and we should keep the alias set for this mem
1148 unchanged when we access a component. Set to 1, or example, when we
1149 are already in a non-addressable component of an aggregate. */
1150 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1151 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1152
1153 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1154 #define MEM_VOLATILE_P(RTX) \
1155 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1156 ASM_INPUT)->volatil)
1157
1158 /* 1 if RTX is a mem that refers to an aggregate, either to the
1159 aggregate itself or to a field of the aggregate. If zero, RTX may
1160 or may not be such a reference. */
1161 #define MEM_IN_STRUCT_P(RTX) \
1162 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1163
1164 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1165 not refer to a scalar. */
1166 #define MEM_SCALAR_P(RTX) \
1167 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1168
1169 /* 1 if RTX is a mem that cannot trap. */
1170 #define MEM_NOTRAP_P(RTX) \
1171 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1172
1173 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1174 RTX. Otherwise, vice versa. Use this macro only when you are
1175 *sure* that you know that the MEM is in a structure, or is a
1176 scalar. VAL is evaluated only once. */
1177 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1178 do { \
1179 if (VAL) \
1180 { \
1181 MEM_IN_STRUCT_P (RTX) = 1; \
1182 MEM_SCALAR_P (RTX) = 0; \
1183 } \
1184 else \
1185 { \
1186 MEM_IN_STRUCT_P (RTX) = 0; \
1187 MEM_SCALAR_P (RTX) = 1; \
1188 } \
1189 } while (0)
1190
1191 /* The memory attribute block. We provide access macros for each value
1192 in the block and provide defaults if none specified. */
1193 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1194
1195 /* The register attribute block. We provide access macros for each value
1196 in the block and provide defaults if none specified. */
1197 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1198
1199 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1200 set, and may alias anything. Otherwise, the MEM can only alias
1201 MEMs in a conflicting alias set. This value is set in a
1202 language-dependent manner in the front-end, and should not be
1203 altered in the back-end. These set numbers are tested with
1204 alias_sets_conflict_p. */
1205 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1206
1207 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1208 refer to part of a DECL. It may also be a COMPONENT_REF. */
1209 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1210
1211 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1212 RTX that is always a CONST_INT. */
1213 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1214
1215 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1216 is always a CONST_INT. */
1217 #define MEM_SIZE(RTX) \
1218 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1219 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1220 : 0)
1221
1222 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1223 mode as a default when STRICT_ALIGNMENT, but not if not. */
1224 #define MEM_ALIGN(RTX) \
1225 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1226 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1227 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1228
1229 /* For a REG rtx, the decl it is known to refer to, if it is known to
1230 refer to part of a DECL. */
1231 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1232
1233 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1234 HOST_WIDE_INT. */
1235 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1236
1237 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1238 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1239 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1240 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1241 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1242 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1243 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1244 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1245 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1246 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1247
1248 /* 1 if RTX is a label_ref for a nonlocal label. */
1249 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1250 REG_LABEL_TARGET note. */
1251 #define LABEL_REF_NONLOCAL_P(RTX) \
1252 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1253
1254 /* 1 if RTX is a code_label that should always be considered to be needed. */
1255 #define LABEL_PRESERVE_P(RTX) \
1256 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1257
1258 /* During sched, 1 if RTX is an insn that must be scheduled together
1259 with the preceding insn. */
1260 #define SCHED_GROUP_P(RTX) \
1261 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1262 )->in_struct)
1263
1264 /* For a SET rtx, SET_DEST is the place that is set
1265 and SET_SRC is the value it is set to. */
1266 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1267 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1268 #define SET_IS_RETURN_P(RTX) \
1269 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1270
1271 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1272 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1273 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1274
1275 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1276 conditionally executing the code on, COND_EXEC_CODE is the code
1277 to execute if the condition is true. */
1278 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1279 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1280
1281 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1282 constants pool. */
1283 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1284 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1285
1286 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1287 tree constant pool. This information is private to varasm.c. */
1288 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1289 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1290 (RTX), SYMBOL_REF)->frame_related)
1291
1292 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1293 #define SYMBOL_REF_FLAG(RTX) \
1294 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1295
1296 /* 1 if RTX is a symbol_ref that has been the library function in
1297 emit_library_call. */
1298 #define SYMBOL_REF_USED(RTX) \
1299 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1300
1301 /* 1 if RTX is a symbol_ref for a weak symbol. */
1302 #define SYMBOL_REF_WEAK(RTX) \
1303 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1304
1305 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1306 SYMBOL_REF_CONSTANT. */
1307 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1308
1309 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1310 pool symbol. */
1311 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1312 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1313
1314 /* The tree (decl or constant) associated with the symbol, or null. */
1315 #define SYMBOL_REF_DECL(RTX) \
1316 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1317
1318 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1319 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1320 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1321
1322 /* The rtx constant pool entry for a symbol, or null. */
1323 #define SYMBOL_REF_CONSTANT(RTX) \
1324 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1325
1326 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1327 information derivable from the tree decl associated with this symbol.
1328 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1329 decl. In some cases this is a bug. But beyond that, it's nice to cache
1330 this information to avoid recomputing it. Finally, this allows space for
1331 the target to store more than one bit of information, as with
1332 SYMBOL_REF_FLAG. */
1333 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1334
1335 /* These flags are common enough to be defined for all targets. They
1336 are computed by the default version of targetm.encode_section_info. */
1337
1338 /* Set if this symbol is a function. */
1339 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1340 #define SYMBOL_REF_FUNCTION_P(RTX) \
1341 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1342 /* Set if targetm.binds_local_p is true. */
1343 #define SYMBOL_FLAG_LOCAL (1 << 1)
1344 #define SYMBOL_REF_LOCAL_P(RTX) \
1345 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1346 /* Set if targetm.in_small_data_p is true. */
1347 #define SYMBOL_FLAG_SMALL (1 << 2)
1348 #define SYMBOL_REF_SMALL_P(RTX) \
1349 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1350 /* The three-bit field at [5:3] is true for TLS variables; use
1351 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1352 #define SYMBOL_FLAG_TLS_SHIFT 3
1353 #define SYMBOL_REF_TLS_MODEL(RTX) \
1354 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1355 /* Set if this symbol is not defined in this translation unit. */
1356 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1357 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1358 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1359 /* Set if this symbol has a block_symbol structure associated with it. */
1360 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1361 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1362 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1363 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1364 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1365 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1366 #define SYMBOL_REF_ANCHOR_P(RTX) \
1367 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1368
1369 /* Subsequent bits are available for the target to use. */
1370 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1371 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1372
1373 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1374 structure to which the symbol belongs, or NULL if it has not been
1375 assigned a block. */
1376 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1377
1378 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1379 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1380 RTX has not yet been assigned to a block, or it has not been given an
1381 offset within that block. */
1382 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1383
1384 /* Indicate whether the machine has any sort of auto increment addressing.
1385 If not, we can avoid checking for REG_INC notes. */
1386
1387 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1388 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1389 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1390 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1391 #define AUTO_INC_DEC
1392 #endif
1393
1394 /* Define a macro to look for REG_INC notes,
1395 but save time on machines where they never exist. */
1396
1397 #ifdef AUTO_INC_DEC
1398 #define FIND_REG_INC_NOTE(INSN, REG) \
1399 ((REG) != NULL_RTX && REG_P ((REG)) \
1400 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1401 : find_reg_note ((INSN), REG_INC, (REG)))
1402 #else
1403 #define FIND_REG_INC_NOTE(INSN, REG) 0
1404 #endif
1405
1406 #ifndef HAVE_PRE_INCREMENT
1407 #define HAVE_PRE_INCREMENT 0
1408 #endif
1409
1410 #ifndef HAVE_PRE_DECREMENT
1411 #define HAVE_PRE_DECREMENT 0
1412 #endif
1413
1414 #ifndef HAVE_POST_INCREMENT
1415 #define HAVE_POST_INCREMENT 0
1416 #endif
1417
1418 #ifndef HAVE_POST_DECREMENT
1419 #define HAVE_POST_DECREMENT 0
1420 #endif
1421
1422 #ifndef HAVE_POST_MODIFY_DISP
1423 #define HAVE_POST_MODIFY_DISP 0
1424 #endif
1425
1426 #ifndef HAVE_POST_MODIFY_REG
1427 #define HAVE_POST_MODIFY_REG 0
1428 #endif
1429
1430 #ifndef HAVE_PRE_MODIFY_DISP
1431 #define HAVE_PRE_MODIFY_DISP 0
1432 #endif
1433
1434 #ifndef HAVE_PRE_MODIFY_REG
1435 #define HAVE_PRE_MODIFY_REG 0
1436 #endif
1437
1438
1439 /* Some architectures do not have complete pre/post increment/decrement
1440 instruction sets, or only move some modes efficiently. These macros
1441 allow us to tune autoincrement generation. */
1442
1443 #ifndef USE_LOAD_POST_INCREMENT
1444 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1445 #endif
1446
1447 #ifndef USE_LOAD_POST_DECREMENT
1448 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1449 #endif
1450
1451 #ifndef USE_LOAD_PRE_INCREMENT
1452 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1453 #endif
1454
1455 #ifndef USE_LOAD_PRE_DECREMENT
1456 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1457 #endif
1458
1459 #ifndef USE_STORE_POST_INCREMENT
1460 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1461 #endif
1462
1463 #ifndef USE_STORE_POST_DECREMENT
1464 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1465 #endif
1466
1467 #ifndef USE_STORE_PRE_INCREMENT
1468 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1469 #endif
1470
1471 #ifndef USE_STORE_PRE_DECREMENT
1472 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1473 #endif
1474 \f
1475 /* Nonzero when we are generating CONCATs. */
1476 extern int generating_concat_p;
1477
1478 /* Nonzero when we are expanding trees to RTL. */
1479 extern int currently_expanding_to_rtl;
1480
1481 /* Generally useful functions. */
1482
1483 /* In expmed.c */
1484 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1485
1486 /* In explow.c */
1487 extern void set_stack_check_libfunc (rtx);
1488 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1489 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1490
1491 /* In emit-rtl.c */
1492 extern rtx gen_blockage (void);
1493 extern rtvec gen_rtvec (int, ...);
1494 extern rtx copy_insn_1 (rtx);
1495 extern rtx copy_insn (rtx);
1496 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1497 extern rtx emit_copy_of_insn_after (rtx, rtx);
1498 extern void set_reg_attrs_from_value (rtx, rtx);
1499 extern void set_reg_attrs_for_parm (rtx, rtx);
1500 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1501 extern void adjust_reg_mode (rtx, enum machine_mode);
1502 extern int mem_expr_equal_p (const_tree, const_tree);
1503
1504 /* In rtl.c */
1505 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1506 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1507
1508 extern rtvec rtvec_alloc (int);
1509 extern bool shared_const_p (const_rtx);
1510 extern rtx copy_rtx (rtx);
1511 extern void dump_rtx_statistics (void);
1512
1513 /* In emit-rtl.c */
1514 extern rtx copy_rtx_if_shared (rtx);
1515
1516 /* In rtl.c */
1517 extern unsigned int rtx_size (const_rtx);
1518 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1519 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1520 extern int rtx_equal_p (const_rtx, const_rtx);
1521
1522 /* In emit-rtl.c */
1523 extern rtvec gen_rtvec_v (int, rtx *);
1524 extern rtx gen_reg_rtx (enum machine_mode);
1525 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1526 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1527 extern rtx gen_reg_rtx_and_attrs (rtx);
1528 extern rtx gen_label_rtx (void);
1529 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1530
1531 /* In cse.c */
1532 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1533
1534 /* In emit-rtl.c */
1535 extern rtx gen_highpart (enum machine_mode, rtx);
1536 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1537 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1538
1539 /* In emit-rtl.c */
1540 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1541 extern int subreg_lowpart_p (const_rtx);
1542 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1543 enum machine_mode);
1544 extern unsigned int subreg_highpart_offset (enum machine_mode,
1545 enum machine_mode);
1546 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1547 extern rtx make_safe_from (rtx, rtx);
1548 extern rtx convert_memory_address (enum machine_mode, rtx);
1549 extern rtx get_insns (void);
1550 extern const char *get_insn_name (int);
1551 extern rtx get_last_insn (void);
1552 extern rtx get_last_insn_anywhere (void);
1553 extern rtx get_first_nonnote_insn (void);
1554 extern rtx get_last_nonnote_insn (void);
1555 extern void start_sequence (void);
1556 extern void push_to_sequence (rtx);
1557 extern void push_to_sequence2 (rtx, rtx);
1558 extern void end_sequence (void);
1559 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1560 enum machine_mode);
1561
1562 /* In loop-iv.c */
1563
1564 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1565
1566 /* In varasm.c */
1567 extern rtx force_const_mem (enum machine_mode, rtx);
1568
1569 /* In varasm.c */
1570
1571 struct function;
1572 extern rtx get_pool_constant (rtx);
1573 extern rtx get_pool_constant_mark (rtx, bool *);
1574 extern enum machine_mode get_pool_mode (const_rtx);
1575 extern rtx simplify_subtraction (rtx);
1576
1577 /* In function.c */
1578 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1579 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1580 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1581 extern rtx assign_stack_temp_for_type (enum machine_mode,
1582 HOST_WIDE_INT, int, tree);
1583 extern rtx assign_temp (tree, int, int, int);
1584
1585 /* In emit-rtl.c */
1586 extern rtx emit_insn_before (rtx, rtx);
1587 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1588 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1589 extern rtx emit_jump_insn_before (rtx, rtx);
1590 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1591 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1592 extern rtx emit_call_insn_before (rtx, rtx);
1593 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1594 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1595 extern rtx emit_barrier_before (rtx);
1596 extern rtx emit_label_before (rtx, rtx);
1597 extern rtx emit_note_before (enum insn_note, rtx);
1598 extern rtx emit_insn_after (rtx, rtx);
1599 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1600 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1601 extern rtx emit_jump_insn_after (rtx, rtx);
1602 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1603 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1604 extern rtx emit_call_insn_after (rtx, rtx);
1605 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1606 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1607 extern rtx emit_barrier_after (rtx);
1608 extern rtx emit_label_after (rtx, rtx);
1609 extern rtx emit_note_after (enum insn_note, rtx);
1610 extern rtx emit_insn (rtx);
1611 extern rtx emit_jump_insn (rtx);
1612 extern rtx emit_call_insn (rtx);
1613 extern rtx emit_label (rtx);
1614 extern rtx emit_barrier (void);
1615 extern rtx emit_note (enum insn_note);
1616 extern rtx emit_note_copy (rtx);
1617 extern rtx gen_clobber (rtx);
1618 extern rtx emit_clobber (rtx);
1619 extern rtx gen_use (rtx);
1620 extern rtx emit_use (rtx);
1621 extern rtx make_insn_raw (rtx);
1622 extern rtx make_jump_insn_raw (rtx);
1623 extern void add_function_usage_to (rtx, rtx);
1624 extern rtx last_call_insn (void);
1625 extern rtx previous_insn (rtx);
1626 extern rtx next_insn (rtx);
1627 extern rtx prev_nonnote_insn (rtx);
1628 extern rtx next_nonnote_insn (rtx);
1629 extern rtx prev_real_insn (rtx);
1630 extern rtx next_real_insn (rtx);
1631 extern rtx prev_active_insn (rtx);
1632 extern rtx next_active_insn (rtx);
1633 extern int active_insn_p (const_rtx);
1634 extern rtx prev_label (rtx);
1635 extern rtx next_label (rtx);
1636 extern rtx skip_consecutive_labels (rtx);
1637 extern rtx next_cc0_user (rtx);
1638 extern rtx prev_cc0_setter (rtx);
1639
1640 /* In cfglayout.c */
1641 extern int insn_line (const_rtx);
1642 extern const char * insn_file (const_rtx);
1643 extern location_t locator_location (int);
1644 extern int locator_line (int);
1645 extern const char * locator_file (int);
1646 extern bool locator_eq (int, int);
1647 extern int prologue_locator, epilogue_locator;
1648
1649 /* In jump.c */
1650 extern enum rtx_code reverse_condition (enum rtx_code);
1651 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1652 extern enum rtx_code swap_condition (enum rtx_code);
1653 extern enum rtx_code unsigned_condition (enum rtx_code);
1654 extern enum rtx_code signed_condition (enum rtx_code);
1655 extern void mark_jump_label (rtx, rtx, int);
1656 extern unsigned int cleanup_barriers (void);
1657
1658 /* In jump.c */
1659 extern rtx delete_related_insns (rtx);
1660
1661 /* In recog.c */
1662 extern rtx *find_constant_term_loc (rtx *);
1663
1664 /* In emit-rtl.c */
1665 extern rtx try_split (rtx, rtx, int);
1666 extern int split_branch_probability;
1667
1668 /* In unknown file */
1669 extern rtx split_insns (rtx, rtx);
1670
1671 /* In simplify-rtx.c */
1672 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1673 rtx, enum machine_mode);
1674 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1675 enum machine_mode);
1676 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1677 rtx, rtx);
1678 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1679 rtx);
1680 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1681 enum machine_mode, rtx, rtx, rtx);
1682 extern rtx simplify_const_relational_operation (enum rtx_code,
1683 enum machine_mode, rtx, rtx);
1684 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1685 enum machine_mode, rtx, rtx);
1686 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1687 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1688 enum machine_mode);
1689 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1690 enum machine_mode, rtx, rtx, rtx);
1691 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1692 enum machine_mode, rtx, rtx);
1693 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1694 unsigned int);
1695 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1696 unsigned int);
1697 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1698 extern rtx simplify_rtx (const_rtx);
1699 extern rtx avoid_constant_pool_reference (rtx);
1700 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1701
1702 /* In reginfo.c */
1703 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1704 bool);
1705
1706 /* In emit-rtl.c */
1707 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1708 extern void set_insn_deleted (rtx);
1709
1710 /* Functions in rtlanal.c */
1711
1712 /* Single set is implemented as macro for performance reasons. */
1713 #define single_set(I) (INSN_P (I) \
1714 ? (GET_CODE (PATTERN (I)) == SET \
1715 ? PATTERN (I) : single_set_1 (I)) \
1716 : NULL_RTX)
1717 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1718
1719 /* Structure used for passing data to REPLACE_LABEL. */
1720 typedef struct replace_label_data
1721 {
1722 rtx r1;
1723 rtx r2;
1724 bool update_label_nuses;
1725 } replace_label_data;
1726
1727 extern int rtx_addr_can_trap_p (const_rtx);
1728 extern bool nonzero_address_p (const_rtx);
1729 extern int rtx_unstable_p (const_rtx);
1730 extern bool rtx_varies_p (const_rtx, bool);
1731 extern bool rtx_addr_varies_p (const_rtx, bool);
1732 extern HOST_WIDE_INT get_integer_term (const_rtx);
1733 extern rtx get_related_value (const_rtx);
1734 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1735 extern void split_const (rtx, rtx *, rtx *);
1736 extern int reg_mentioned_p (const_rtx, const_rtx);
1737 extern int count_occurrences (const_rtx, const_rtx, int);
1738 extern int reg_referenced_p (const_rtx, const_rtx);
1739 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1740 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1741 extern int commutative_operand_precedence (rtx);
1742 extern bool swap_commutative_operands_p (rtx, rtx);
1743 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1744 extern int no_labels_between_p (const_rtx, const_rtx);
1745 extern int modified_in_p (const_rtx, const_rtx);
1746 extern int reg_set_p (const_rtx, const_rtx);
1747 extern rtx single_set_2 (const_rtx, const_rtx);
1748 extern int multiple_sets (const_rtx);
1749 extern int set_noop_p (const_rtx);
1750 extern int noop_move_p (const_rtx);
1751 extern rtx find_last_value (rtx, rtx *, rtx, int);
1752 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1753 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1754 extern const_rtx set_of (const_rtx, const_rtx);
1755 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1756 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1757 extern int dead_or_set_p (const_rtx, const_rtx);
1758 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1759 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1760 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1761 extern rtx find_reg_equal_equiv_note (const_rtx);
1762 extern rtx find_constant_src (const_rtx);
1763 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1764 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1765 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1766 extern void add_reg_note (rtx, enum reg_note, rtx);
1767 extern void remove_note (rtx, const_rtx);
1768 extern void remove_reg_equal_equiv_notes (rtx);
1769 extern int side_effects_p (const_rtx);
1770 extern int volatile_refs_p (const_rtx);
1771 extern int volatile_insn_p (const_rtx);
1772 extern int may_trap_p_1 (const_rtx, unsigned);
1773 extern int may_trap_p (const_rtx);
1774 extern int may_trap_or_fault_p (const_rtx);
1775 extern int inequality_comparisons_p (const_rtx);
1776 extern rtx replace_rtx (rtx, rtx, rtx);
1777 extern int replace_label (rtx *, void *);
1778 extern int rtx_referenced_p (rtx, rtx);
1779 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1780 extern int computed_jump_p (const_rtx);
1781
1782 typedef int (*rtx_function) (rtx *, void *);
1783 extern int for_each_rtx (rtx *, rtx_function, void *);
1784
1785 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1786 rtx *, rtx *);
1787 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1788 rtx_equal_p_callback_function);
1789
1790 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1791 enum machine_mode *);
1792 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1793 bool, hash_rtx_callback_function);
1794
1795 extern rtx regno_use_in (unsigned int, rtx);
1796 extern int auto_inc_p (const_rtx);
1797 extern int in_expr_list_p (const_rtx, const_rtx);
1798 extern void remove_node_from_expr_list (const_rtx, rtx *);
1799 extern int loc_mentioned_in_p (rtx *, const_rtx);
1800 extern rtx find_first_parameter_load (rtx, rtx);
1801 extern bool keep_with_call_p (const_rtx);
1802 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1803 extern int insn_rtx_cost (rtx, bool);
1804
1805 /* Given an insn and condition, return a canonical description of
1806 the test being made. */
1807 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1808
1809 /* Given a JUMP_INSN, return a canonical description of the test
1810 being made. */
1811 extern rtx get_condition (rtx, rtx *, int, int);
1812
1813 /* Information about a subreg of a hard register. */
1814 struct subreg_info
1815 {
1816 /* Offset of first hard register involved in the subreg. */
1817 int offset;
1818 /* Number of hard registers involved in the subreg. */
1819 int nregs;
1820 /* Whether this subreg can be represented as a hard reg with the new
1821 mode. */
1822 bool representable_p;
1823 };
1824
1825 extern void subreg_get_info (unsigned int, enum machine_mode,
1826 unsigned int, enum machine_mode,
1827 struct subreg_info *);
1828
1829 /* lists.c */
1830
1831 extern void free_EXPR_LIST_list (rtx *);
1832 extern void free_INSN_LIST_list (rtx *);
1833 extern void free_EXPR_LIST_node (rtx);
1834 extern void free_INSN_LIST_node (rtx);
1835 extern rtx alloc_INSN_LIST (rtx, rtx);
1836 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1837 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1838 extern rtx remove_list_elem (rtx, rtx *);
1839 extern rtx remove_free_INSN_LIST_node (rtx *);
1840 extern rtx remove_free_EXPR_LIST_node (rtx *);
1841
1842
1843 /* reginfo.c */
1844
1845 /* Initialize may_move_cost and friends for mode M. */
1846 extern void init_move_cost (enum machine_mode);
1847 /* Allocate register info memory. */
1848 extern void allocate_reg_info (void);
1849 /* Resize reg info. */
1850 extern void resize_reg_info (void);
1851 /* Free up register info memory. */
1852 extern void free_reg_info (void);
1853
1854 /* recog.c */
1855 extern int asm_noperands (const_rtx);
1856 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1857 enum machine_mode *, location_t *);
1858
1859 extern enum reg_class reg_preferred_class (int);
1860 extern enum reg_class reg_alternate_class (int);
1861 extern void setup_reg_classes (int, enum reg_class, enum reg_class);
1862
1863 extern void split_all_insns (void);
1864 extern unsigned int split_all_insns_noflow (void);
1865
1866 #define MAX_SAVED_CONST_INT 64
1867 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1868
1869 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1870 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1871 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1872 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1873 extern GTY(()) rtx const_true_rtx;
1874
1875 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1876
1877 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1878 same as VOIDmode. */
1879
1880 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1881
1882 /* Likewise, for the constants 1 and 2. */
1883
1884 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1885 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1886
1887 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1888 is used to represent the frame pointer. This is because the
1889 hard frame pointer and the automatic variables are separated by an amount
1890 that cannot be determined until after register allocation. We can assume
1891 that in this case ELIMINABLE_REGS will be defined, one action of which
1892 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1893 #ifndef HARD_FRAME_POINTER_REGNUM
1894 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1895 #endif
1896
1897 /* Index labels for global_rtl. */
1898 enum global_rtl_index
1899 {
1900 GR_PC,
1901 GR_CC0,
1902 GR_STACK_POINTER,
1903 GR_FRAME_POINTER,
1904 /* For register elimination to work properly these hard_frame_pointer_rtx,
1905 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1906 the same register. */
1907 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1908 GR_ARG_POINTER = GR_FRAME_POINTER,
1909 #endif
1910 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1911 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1912 #else
1913 GR_HARD_FRAME_POINTER,
1914 #endif
1915 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1916 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1917 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1918 #else
1919 GR_ARG_POINTER,
1920 #endif
1921 #endif
1922 GR_VIRTUAL_INCOMING_ARGS,
1923 GR_VIRTUAL_STACK_ARGS,
1924 GR_VIRTUAL_STACK_DYNAMIC,
1925 GR_VIRTUAL_OUTGOING_ARGS,
1926 GR_VIRTUAL_CFA,
1927
1928 GR_MAX
1929 };
1930
1931 /* Pointers to standard pieces of rtx are stored here. */
1932 extern GTY(()) rtx global_rtl[GR_MAX];
1933
1934 /* Standard pieces of rtx, to be substituted directly into things. */
1935 #define pc_rtx (global_rtl[GR_PC])
1936 #define cc0_rtx (global_rtl[GR_CC0])
1937
1938 /* All references to certain hard regs, except those created
1939 by allocating pseudo regs into them (when that's possible),
1940 go through these unique rtx objects. */
1941 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1942 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1943 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1944 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1945
1946 extern GTY(()) rtx pic_offset_table_rtx;
1947 extern GTY(()) rtx static_chain_rtx;
1948 extern GTY(()) rtx static_chain_incoming_rtx;
1949 extern GTY(()) rtx return_address_pointer_rtx;
1950
1951 /* Include the RTL generation functions. */
1952
1953 #ifndef GENERATOR_FILE
1954 #include "genrtl.h"
1955 #undef gen_rtx_ASM_INPUT
1956 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
1957 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
1958 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
1959 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
1960 #endif
1961
1962 /* There are some RTL codes that require special attention; the
1963 generation functions included above do the raw handling. If you
1964 add to this list, modify special_rtx in gengenrtl.c as well. */
1965
1966 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1967 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1968 extern rtx gen_raw_REG (enum machine_mode, int);
1969 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1970 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1971 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1972
1973 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1974
1975 /* Virtual registers are used during RTL generation to refer to locations into
1976 the stack frame when the actual location isn't known until RTL generation
1977 is complete. The routine instantiate_virtual_regs replaces these with
1978 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1979 a constant. */
1980
1981 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1982
1983 /* This points to the first word of the incoming arguments passed on the stack,
1984 either by the caller or by the callee when pretending it was passed by the
1985 caller. */
1986
1987 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1988
1989 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1990
1991 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1992 variable on the stack. Otherwise, it points to the first variable on
1993 the stack. */
1994
1995 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1996
1997 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1998
1999 /* This points to the location of dynamically-allocated memory on the stack
2000 immediately after the stack pointer has been adjusted by the amount
2001 desired. */
2002
2003 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2004
2005 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2006
2007 /* This points to the location in the stack at which outgoing arguments should
2008 be written when the stack is pre-pushed (arguments pushed using push
2009 insns always use sp). */
2010
2011 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2012
2013 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2014
2015 /* This points to the Canonical Frame Address of the function. This
2016 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2017 but is calculated relative to the arg pointer for simplicity; the
2018 frame pointer nor stack pointer are necessarily fixed relative to
2019 the CFA until after reload. */
2020
2021 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2022
2023 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2024
2025 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2026
2027 /* Nonzero if REGNUM is a pointer into the stack frame. */
2028 #define REGNO_PTR_FRAME_P(REGNUM) \
2029 ((REGNUM) == STACK_POINTER_REGNUM \
2030 || (REGNUM) == FRAME_POINTER_REGNUM \
2031 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2032 || (REGNUM) == ARG_POINTER_REGNUM \
2033 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2034 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2035
2036 /* REGNUM never really appearing in the INSN stream. */
2037 #define INVALID_REGNUM (~(unsigned int) 0)
2038
2039 extern rtx output_constant_def (tree, int);
2040 extern rtx lookup_constant_def (tree);
2041
2042 /* Nonzero after end of reload pass.
2043 Set to 1 or 0 by reload1.c. */
2044
2045 extern int reload_completed;
2046
2047 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2048 extern int epilogue_completed;
2049
2050 /* Set to 1 while reload_as_needed is operating.
2051 Required by some machines to handle any generated moves differently. */
2052
2053 extern int reload_in_progress;
2054
2055 /* This macro indicates whether you may create a new
2056 pseudo-register. */
2057
2058 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2059
2060 #ifdef STACK_REGS
2061 /* Nonzero after end of regstack pass.
2062 Set to 1 or 0 by reg-stack.c. */
2063 extern int regstack_completed;
2064 #endif
2065
2066 /* If this is nonzero, we do not bother generating VOLATILE
2067 around volatile memory references, and we are willing to
2068 output indirect addresses. If cse is to follow, we reject
2069 indirect addresses so a useful potential cse is generated;
2070 if it is used only once, instruction combination will produce
2071 the same indirect address eventually. */
2072 extern int cse_not_expected;
2073
2074 /* Translates rtx code to tree code, for those codes needed by
2075 REAL_ARITHMETIC. The function returns an int because the caller may not
2076 know what `enum tree_code' means. */
2077
2078 extern int rtx_to_tree_code (enum rtx_code);
2079
2080 /* In cse.c */
2081 extern int delete_trivially_dead_insns (rtx, int);
2082 extern int cse_main (rtx, int);
2083 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2084 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2085
2086 /* In jump.c */
2087 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2088 extern int condjump_p (const_rtx);
2089 extern int any_condjump_p (const_rtx);
2090 extern int any_uncondjump_p (const_rtx);
2091 extern rtx pc_set (const_rtx);
2092 extern rtx condjump_label (const_rtx);
2093 extern int simplejump_p (const_rtx);
2094 extern int returnjump_p (rtx);
2095 extern int eh_returnjump_p (rtx);
2096 extern int onlyjump_p (const_rtx);
2097 extern int only_sets_cc0_p (const_rtx);
2098 extern int sets_cc0_p (const_rtx);
2099 extern int invert_jump_1 (rtx, rtx);
2100 extern int invert_jump (rtx, rtx, int);
2101 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2102 extern int true_regnum (const_rtx);
2103 extern unsigned int reg_or_subregno (const_rtx);
2104 extern int redirect_jump_1 (rtx, rtx);
2105 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2106 extern int redirect_jump (rtx, rtx, int);
2107 extern void rebuild_jump_labels (rtx);
2108 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2109 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2110 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2111 const_rtx, const_rtx);
2112 extern void delete_for_peephole (rtx, rtx);
2113 extern int condjump_in_parallel_p (const_rtx);
2114
2115 /* In emit-rtl.c. */
2116 extern int max_reg_num (void);
2117 extern int max_label_num (void);
2118 extern int get_first_label_num (void);
2119 extern void maybe_set_first_label_num (rtx);
2120 extern void delete_insns_since (rtx);
2121 extern void mark_reg_pointer (rtx, int);
2122 extern void mark_user_reg (rtx);
2123 extern void reset_used_flags (rtx);
2124 extern void set_used_flags (rtx);
2125 extern void reorder_insns (rtx, rtx, rtx);
2126 extern void reorder_insns_nobb (rtx, rtx, rtx);
2127 extern int get_max_uid (void);
2128 extern int in_sequence_p (void);
2129 extern void force_next_line_note (void);
2130 extern void init_emit (void);
2131 extern void init_emit_regs (void);
2132 extern void init_emit_once (int);
2133 extern void push_topmost_sequence (void);
2134 extern void pop_topmost_sequence (void);
2135 extern void set_new_first_and_last_insn (rtx, rtx);
2136 extern unsigned int unshare_all_rtl (void);
2137 extern void unshare_all_rtl_again (rtx);
2138 extern void unshare_all_rtl_in_chain (rtx);
2139 extern void verify_rtl_sharing (void);
2140 extern void set_first_insn (rtx);
2141 extern void set_last_insn (rtx);
2142 extern void link_cc0_insns (rtx);
2143 extern void add_insn (rtx);
2144 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2145 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2146 extern void remove_insn (rtx);
2147 extern rtx emit (rtx);
2148 extern rtx delete_insn (rtx);
2149 extern rtx entry_of_function (void);
2150 extern void emit_insn_at_entry (rtx);
2151 extern void delete_insn_chain (rtx, rtx, bool);
2152 extern rtx unlink_insn_chain (rtx, rtx);
2153 extern rtx delete_insn_and_edges (rtx);
2154 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2155 extern rtx gen_const_mem (enum machine_mode, rtx);
2156 extern rtx gen_frame_mem (enum machine_mode, rtx);
2157 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2158 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2159 const_rtx, unsigned int);
2160
2161 /* In combine.c */
2162 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2163 extern rtx remove_death (unsigned int, rtx);
2164 extern void dump_combine_stats (FILE *);
2165 extern void dump_combine_total_stats (FILE *);
2166
2167 /* In cfgcleanup.c */
2168 extern void delete_dead_jumptables (void);
2169
2170 /* In sched-vis.c. */
2171 extern void debug_bb_n_slim (int);
2172 extern void debug_bb_slim (struct basic_block_def *);
2173 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2174 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2175 extern void dump_insn_slim (FILE *f, rtx x);
2176 extern void debug_insn_slim (rtx x);
2177
2178 /* In sched-rgn.c. */
2179 extern void schedule_insns (void);
2180
2181 /* In sched-ebb.c. */
2182 extern void schedule_ebbs (void);
2183
2184 /* In haifa-sched.c. */
2185 extern void fix_sched_param (const char *, const char *);
2186
2187 /* In sel-sched-dump.c. */
2188 extern void sel_sched_fix_param (const char *param, const char *val);
2189
2190 /* In print-rtl.c */
2191 extern const char *print_rtx_head;
2192 extern void debug_rtx (const_rtx);
2193 extern void debug_rtx_list (const_rtx, int);
2194 extern void debug_rtx_range (const_rtx, const_rtx);
2195 extern const_rtx debug_rtx_find (const_rtx, int);
2196 extern void print_mem_expr (FILE *, const_tree);
2197 extern void print_rtl (FILE *, const_rtx);
2198 extern void print_simple_rtl (FILE *, const_rtx);
2199 extern int print_rtl_single (FILE *, const_rtx);
2200 extern void print_inline_rtx (FILE *, const_rtx, int);
2201
2202 /* In function.c */
2203 extern void reposition_prologue_and_epilogue_notes (void);
2204 extern int prologue_epilogue_contains (const_rtx);
2205 extern int sibcall_epilogue_contains (const_rtx);
2206 extern void mark_temp_addr_taken (rtx);
2207 extern void update_temp_slot_address (rtx, rtx);
2208 extern void maybe_copy_epilogue_insn (rtx, rtx);
2209
2210 /* In stmt.c */
2211 extern void expand_null_return (void);
2212 extern void expand_naked_return (void);
2213 extern void emit_jump (rtx);
2214
2215 /* In expr.c */
2216 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2217 unsigned int, int);
2218
2219 /* In cfgrtl.c */
2220 extern void print_rtl_with_bb (FILE *, const_rtx);
2221
2222 /* In cfg.c. */
2223 extern void dump_reg_info (FILE *);
2224 extern void dump_flow_info (FILE *, int);
2225
2226 /* In expmed.c */
2227 extern void init_expmed (void);
2228 extern void expand_inc (rtx, rtx);
2229 extern void expand_dec (rtx, rtx);
2230
2231 /* In gcse.c */
2232 extern bool can_copy_p (enum machine_mode);
2233 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2234 extern rtx fis_get_condition (rtx);
2235
2236 /* In ira.c */
2237 #ifdef HARD_CONST
2238 extern HARD_REG_SET eliminable_regset;
2239 #endif
2240 extern void mark_elimination (int, int);
2241
2242 /* In reginfo.c */
2243 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2244 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2245 extern void globalize_reg (int);
2246 extern void init_reg_modes_target (void);
2247 extern void init_regs (void);
2248 extern void reinit_regs (void);
2249 extern void init_fake_stack_mems (void);
2250 extern void save_register_info (void);
2251 extern void init_reg_sets (void);
2252 extern void regclass (rtx, int);
2253 extern void reg_scan (rtx, unsigned int);
2254 extern void fix_register (const char *, int, int);
2255 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2256 enum machine_mode);
2257
2258 /* In reorg.c */
2259 extern void dbr_schedule (rtx);
2260
2261 /* In reload1.c */
2262 extern int function_invariant_p (const_rtx);
2263
2264 /* In calls.c */
2265 enum libcall_type
2266 {
2267 LCT_NORMAL = 0,
2268 LCT_CONST = 1,
2269 LCT_PURE = 2,
2270 LCT_NORETURN = 3,
2271 LCT_THROW = 4,
2272 LCT_RETURNS_TWICE = 5
2273 };
2274
2275 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2276 ...);
2277 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2278 enum machine_mode, int, ...);
2279
2280 /* In varasm.c */
2281 extern void init_varasm_once (void);
2282 extern enum tls_model decl_default_tls_model (const_tree);
2283
2284 /* In rtl.c */
2285 extern void traverse_md_constants (int (*) (void **, void *), void *);
2286 struct md_constant { char *name, *value; };
2287
2288 /* In read-rtl.c */
2289 extern int read_skip_spaces (FILE *);
2290 extern bool read_rtx (FILE *, rtx *, int *);
2291 extern void copy_rtx_ptr_loc (const void *, const void *);
2292 extern void print_rtx_ptr_loc (const void *);
2293 extern const char *join_c_conditions (const char *, const char *);
2294 extern void print_c_condition (const char *);
2295 extern const char *read_rtx_filename;
2296 extern int read_rtx_lineno;
2297
2298 /* In alias.c */
2299 extern rtx canon_rtx (rtx);
2300 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2301 extern rtx get_addr (rtx);
2302 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2303 rtx, bool (*)(const_rtx, bool));
2304 extern int read_dependence (const_rtx, const_rtx);
2305 extern int anti_dependence (const_rtx, const_rtx);
2306 extern int output_dependence (const_rtx, const_rtx);
2307 extern void init_alias_target (void);
2308 extern void init_alias_analysis (void);
2309 extern void end_alias_analysis (void);
2310 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2311 extern rtx find_base_term (rtx);
2312 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2313 extern rtx get_reg_known_value (unsigned int);
2314 extern bool get_reg_known_equiv_p (unsigned int);
2315
2316 #ifdef STACK_REGS
2317 extern int stack_regs_mentioned (const_rtx insn);
2318 #endif
2319
2320 /* In toplev.c */
2321 extern GTY(()) rtx stack_limit_rtx;
2322
2323 /* In predict.c */
2324 extern void invert_br_probabilities (rtx);
2325 extern bool expensive_function_p (int);
2326 /* In cfgexpand.c */
2327 extern void add_reg_br_prob_note (rtx last, int probability);
2328
2329 /* In var-tracking.c */
2330 extern unsigned int variable_tracking_main (void);
2331
2332 /* In stor-layout.c. */
2333 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2334 rtx *, rtx *);
2335
2336 /* In loop-unswitch.c */
2337 extern rtx reversed_condition (rtx);
2338 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2339
2340 /* In loop-iv.c */
2341 extern rtx canon_condition (rtx);
2342 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2343
2344 /* In final.c */
2345 extern unsigned int compute_alignments (void);
2346 \f
2347 struct rtl_hooks
2348 {
2349 rtx (*gen_lowpart) (enum machine_mode, rtx);
2350 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2351 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2352 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2353 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2354 unsigned int, unsigned int *);
2355 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2356
2357 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2358 };
2359
2360 /* Each pass can provide its own. */
2361 extern struct rtl_hooks rtl_hooks;
2362
2363 /* ... but then it has to restore these. */
2364 extern const struct rtl_hooks general_rtl_hooks;
2365
2366 /* Keep this for the nonce. */
2367 #define gen_lowpart rtl_hooks.gen_lowpart
2368
2369 extern void insn_locators_alloc (void);
2370 extern void insn_locators_free (void);
2371 extern void insn_locators_finalize (void);
2372 extern void set_curr_insn_source_location (location_t);
2373 extern void set_curr_insn_block (tree);
2374 extern int curr_insn_locator (void);
2375 extern bool optimize_insn_for_size_p (void);
2376 extern bool optimize_insn_for_speed_p (void);
2377
2378 #endif /* ! GCC_RTL_H */
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