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Fix typo in ChangeLog entry date.
[official-gcc.git] / gcc / rtl.h
blob1282b909cf7a00cbbdb574ab9ff66ac5dab18f45
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 /* The body of an insn. */
754 #define PATTERN(INSN) XEXP (INSN, 5)
755
756 /* Code number of instruction, from when it was recognized.
757 -1 means this instruction has not been recognized yet. */
758 #define INSN_CODE(INSN) XINT (INSN, 6)
759
760 #define RTX_FRAME_RELATED_P(RTX) \
761 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
762 JUMP_INSN, BARRIER, SET)->frame_related)
763
764 /* 1 if RTX is an insn that has been deleted. */
765 #define INSN_DELETED_P(RTX) \
766 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
767 CODE_LABEL, BARRIER, NOTE)->volatil)
768
769 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
770 TREE_READONLY. */
771 #define RTL_CONST_CALL_P(RTX) \
772 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
773
774 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
775 DECL_PURE_P. */
776 #define RTL_PURE_CALL_P(RTX) \
777 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
778
779 /* 1 if RTX is a call to a const or pure function. */
780 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
781 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
782
783 /* 1 if RTX is a call to a looping const or pure function. Built from
784 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
785 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
786 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
787
788 /* 1 if RTX is a call_insn for a sibling call. */
789 #define SIBLING_CALL_P(RTX) \
790 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
791
792 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
793 #define INSN_ANNULLED_BRANCH_P(RTX) \
794 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
795
796 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
797 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
798 executed if the branch is taken. For annulled branches with this bit
799 clear, the insn should be executed only if the branch is not taken. */
800 #define INSN_FROM_TARGET_P(RTX) \
801 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
802
803 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
804 See the comments for ADDR_DIFF_VEC in rtl.def. */
805 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
806
807 /* In a VALUE, the value cselib has assigned to RTX.
808 This is a "struct cselib_val_struct", see cselib.h. */
809 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
810
811 /* Holds a list of notes on what this insn does to various REGs.
812 It is a chain of EXPR_LIST rtx's, where the second operand is the
813 chain pointer and the first operand is the REG being described.
814 The mode field of the EXPR_LIST contains not a real machine mode
815 but a value from enum reg_note. */
816 #define REG_NOTES(INSN) XEXP(INSN, 7)
817
818 enum reg_note
819 {
820 #define DEF_REG_NOTE(NAME) NAME,
821 #include "reg-notes.def"
822 #undef DEF_REG_NOTE
823 REG_NOTE_MAX
824 };
825
826 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
827 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
828 #define PUT_REG_NOTE_KIND(LINK, KIND) \
829 PUT_MODE (LINK, (enum machine_mode) (KIND))
830
831 /* Names for REG_NOTE's in EXPR_LIST insn's. */
832
833 extern const char * const reg_note_name[];
834 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
835
836 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
837 USE and CLOBBER expressions.
838 USE expressions list the registers filled with arguments that
839 are passed to the function.
840 CLOBBER expressions document the registers explicitly clobbered
841 by this CALL_INSN.
842 Pseudo registers can not be mentioned in this list. */
843 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
844
845 /* The label-number of a code-label. The assembler label
846 is made from `L' and the label-number printed in decimal.
847 Label numbers are unique in a compilation. */
848 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
849
850 /* In a NOTE that is a line number, this is a string for the file name that the
851 line is in. We use the same field to record block numbers temporarily in
852 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
853 between ints and pointers if we use a different macro for the block number.)
854 */
855
856 /* Opaque data. */
857 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
858 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
859 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
860 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
861 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
862 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
863 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
864
865 /* In a NOTE that is a line number, this is the line number.
866 Other kinds of NOTEs are identified by negative numbers here. */
867 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
868
869 /* Nonzero if INSN is a note marking the beginning of a basic block. */
870 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
871 (GET_CODE (INSN) == NOTE \
872 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
873
874 /* Variable declaration and the location of a variable. */
875 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
876 0, VAR_LOCATION))
877 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
878 1, VAR_LOCATION))
879
880 /* Initialization status of the variable in the location. Status
881 can be unknown, uninitialized or initialized. See enumeration
882 type below. */
883 #define NOTE_VAR_LOCATION_STATUS(INSN) \
884 ((enum var_init_status) (XCINT (XCEXP (INSN, 4, NOTE), 2, VAR_LOCATION)))
885
886 /* Possible initialization status of a variable. When requested
887 by the user, this information is tracked and recorded in the DWARF
888 debug information, along with the variable's location. */
889 enum var_init_status
890 {
891 VAR_INIT_STATUS_UNKNOWN,
892 VAR_INIT_STATUS_UNINITIALIZED,
893 VAR_INIT_STATUS_INITIALIZED
894 };
895
896 /* Codes that appear in the NOTE_KIND field for kinds of notes
897 that are not line numbers. These codes are all negative.
898
899 Notice that we do not try to use zero here for any of
900 the special note codes because sometimes the source line
901 actually can be zero! This happens (for example) when we
902 are generating code for the per-translation-unit constructor
903 and destructor routines for some C++ translation unit. */
904
905 enum insn_note
906 {
907 #define DEF_INSN_NOTE(NAME) NAME,
908 #include "insn-notes.def"
909 #undef DEF_INSN_NOTE
910
911 NOTE_INSN_MAX
912 };
913
914 /* Names for NOTE insn's other than line numbers. */
915
916 extern const char * const note_insn_name[NOTE_INSN_MAX];
917 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
918 (note_insn_name[(NOTE_CODE)])
919
920 /* The name of a label, in case it corresponds to an explicit label
921 in the input source code. */
922 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
923
924 /* In jump.c, each label contains a count of the number
925 of LABEL_REFs that point at it, so unused labels can be deleted. */
926 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
927
928 /* Labels carry a two-bit field composed of the ->jump and ->call
929 bits. This field indicates whether the label is an alternate
930 entry point, and if so, what kind. */
931 enum label_kind
932 {
933 LABEL_NORMAL = 0, /* ordinary label */
934 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
935 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
936 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
937 };
938
939 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
940
941 /* Retrieve the kind of LABEL. */
942 #define LABEL_KIND(LABEL) __extension__ \
943 ({ __typeof (LABEL) const _label = (LABEL); \
944 if (GET_CODE (_label) != CODE_LABEL) \
945 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
946 __FUNCTION__); \
947 (enum label_kind) ((_label->jump << 1) | _label->call); })
948
949 /* Set the kind of LABEL. */
950 #define SET_LABEL_KIND(LABEL, KIND) do { \
951 __typeof (LABEL) const _label = (LABEL); \
952 const unsigned int _kind = (KIND); \
953 if (GET_CODE (_label) != CODE_LABEL) \
954 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
955 __FUNCTION__); \
956 _label->jump = ((_kind >> 1) & 1); \
957 _label->call = (_kind & 1); \
958 } while (0)
959
960 #else
961
962 /* Retrieve the kind of LABEL. */
963 #define LABEL_KIND(LABEL) \
964 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
965
966 /* Set the kind of LABEL. */
967 #define SET_LABEL_KIND(LABEL, KIND) do { \
968 rtx const _label = (LABEL); \
969 const unsigned int _kind = (KIND); \
970 _label->jump = ((_kind >> 1) & 1); \
971 _label->call = (_kind & 1); \
972 } while (0)
973
974 #endif /* rtl flag checking */
975
976 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
977
978 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
979 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
980 be decremented and possibly the label can be deleted. */
981 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
982
983 /* Once basic blocks are found, each CODE_LABEL starts a chain that
984 goes through all the LABEL_REFs that jump to that label. The chain
985 eventually winds up at the CODE_LABEL: it is circular. */
986 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
987 \f
988 /* For a REG rtx, REGNO extracts the register number. REGNO can only
989 be used on RHS. Use SET_REGNO to change the value. */
990 #define REGNO(RTX) (rhs_regno(RTX))
991 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
992
993 /* ORIGINAL_REGNO holds the number the register originally had; for a
994 pseudo register turned into a hard reg this will hold the old pseudo
995 register number. */
996 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
997
998 /* Force the REGNO macro to only be used on the lhs. */
999 static inline unsigned int
1000 rhs_regno (const_rtx x)
1001 {
1002 return XCUINT (x, 0, REG);
1003 }
1004
1005
1006
1007 /* 1 if RTX is a reg or parallel that is the current function's return
1008 value. */
1009 #define REG_FUNCTION_VALUE_P(RTX) \
1010 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1011
1012 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1013 #define REG_USERVAR_P(RTX) \
1014 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1015
1016 /* 1 if RTX is a reg that holds a pointer value. */
1017 #define REG_POINTER(RTX) \
1018 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1019
1020 /* 1 if RTX is a mem that holds a pointer value. */
1021 #define MEM_POINTER(RTX) \
1022 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1023
1024 /* 1 if the given register REG corresponds to a hard register. */
1025 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1026
1027 /* 1 if the given register number REG_NO corresponds to a hard register. */
1028 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1029
1030 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1031 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1032 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1033
1034 /* For a CONST_DOUBLE:
1035 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1036 low-order word and ..._HIGH the high-order.
1037 For a float, there is a REAL_VALUE_TYPE structure, and
1038 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1039 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1040 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1041 #define CONST_DOUBLE_REAL_VALUE(r) \
1042 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1043
1044 #define CONST_FIXED_VALUE(r) \
1045 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1046 #define CONST_FIXED_VALUE_HIGH(r) \
1047 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1048 #define CONST_FIXED_VALUE_LOW(r) \
1049 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1050
1051 /* For a CONST_VECTOR, return element #n. */
1052 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1053
1054 /* For a CONST_VECTOR, return the number of elements in a vector. */
1055 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1056
1057 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1058 SUBREG_BYTE extracts the byte-number. */
1059
1060 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1061 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1062
1063 /* in rtlanal.c */
1064 /* Return the right cost to give to an operation
1065 to make the cost of the corresponding register-to-register instruction
1066 N times that of a fast register-to-register instruction. */
1067 #define COSTS_N_INSNS(N) ((N) * 4)
1068
1069 /* Maximum cost of an rtl expression. This value has the special meaning
1070 not to use an rtx with this cost under any circumstances. */
1071 #define MAX_COST INT_MAX
1072
1073 extern void init_rtlanal (void);
1074 extern int rtx_cost (rtx, enum rtx_code, bool);
1075 extern int address_cost (rtx, enum machine_mode, bool);
1076 extern unsigned int subreg_lsb (const_rtx);
1077 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1078 unsigned int);
1079 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1080 unsigned int, enum machine_mode);
1081 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1082 unsigned int, enum machine_mode);
1083 extern unsigned int subreg_regno (const_rtx);
1084 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1085 unsigned int, enum machine_mode);
1086 extern unsigned int subreg_nregs (const_rtx);
1087 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1088 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1089 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1090 extern bool constant_pool_constant_p (rtx);
1091 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1092
1093
1094 /* 1 if RTX is a subreg containing a reg that is already known to be
1095 sign- or zero-extended from the mode of the subreg to the mode of
1096 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1097 extension.
1098
1099 When used as a LHS, is means that this extension must be done
1100 when assigning to SUBREG_REG. */
1101
1102 #define SUBREG_PROMOTED_VAR_P(RTX) \
1103 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1104
1105 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1106 do { \
1107 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1108 if ((VAL) < 0) \
1109 _rtx->volatil = 1; \
1110 else { \
1111 _rtx->volatil = 0; \
1112 _rtx->unchanging = (VAL); \
1113 } \
1114 } while (0)
1115 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1116 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1117 ? -1 : (RTX)->unchanging)
1118
1119 /* Access various components of an ASM_OPERANDS rtx. */
1120
1121 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1122 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1123 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1124 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1125 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1126 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1127 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1128 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1129 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1130 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1131 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1132 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1133 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1134 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1135 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1136
1137 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1138 #define MEM_READONLY_P(RTX) \
1139 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1140
1141 /* 1 if RTX is a mem and we should keep the alias set for this mem
1142 unchanged when we access a component. Set to 1, or example, when we
1143 are already in a non-addressable component of an aggregate. */
1144 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1145 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1146
1147 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1148 #define MEM_VOLATILE_P(RTX) \
1149 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1150 ASM_INPUT)->volatil)
1151
1152 /* 1 if RTX is a mem that refers to an aggregate, either to the
1153 aggregate itself or to a field of the aggregate. If zero, RTX may
1154 or may not be such a reference. */
1155 #define MEM_IN_STRUCT_P(RTX) \
1156 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1157
1158 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1159 not refer to a scalar. */
1160 #define MEM_SCALAR_P(RTX) \
1161 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1162
1163 /* 1 if RTX is a mem that cannot trap. */
1164 #define MEM_NOTRAP_P(RTX) \
1165 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1166
1167 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1168 RTX. Otherwise, vice versa. Use this macro only when you are
1169 *sure* that you know that the MEM is in a structure, or is a
1170 scalar. VAL is evaluated only once. */
1171 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1172 do { \
1173 if (VAL) \
1174 { \
1175 MEM_IN_STRUCT_P (RTX) = 1; \
1176 MEM_SCALAR_P (RTX) = 0; \
1177 } \
1178 else \
1179 { \
1180 MEM_IN_STRUCT_P (RTX) = 0; \
1181 MEM_SCALAR_P (RTX) = 1; \
1182 } \
1183 } while (0)
1184
1185 /* The memory attribute block. We provide access macros for each value
1186 in the block and provide defaults if none specified. */
1187 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1188
1189 /* The register attribute block. We provide access macros for each value
1190 in the block and provide defaults if none specified. */
1191 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1192
1193 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1194 set, and may alias anything. Otherwise, the MEM can only alias
1195 MEMs in a conflicting alias set. This value is set in a
1196 language-dependent manner in the front-end, and should not be
1197 altered in the back-end. These set numbers are tested with
1198 alias_sets_conflict_p. */
1199 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1200
1201 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1202 refer to part of a DECL. It may also be a COMPONENT_REF. */
1203 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1204
1205 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1206 RTX that is always a CONST_INT. */
1207 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1208
1209 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1210 is always a CONST_INT. */
1211 #define MEM_SIZE(RTX) \
1212 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1213 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1214 : 0)
1215
1216 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1217 mode as a default when STRICT_ALIGNMENT, but not if not. */
1218 #define MEM_ALIGN(RTX) \
1219 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1220 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1221 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1222
1223 /* For a REG rtx, the decl it is known to refer to, if it is known to
1224 refer to part of a DECL. */
1225 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1226
1227 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1228 HOST_WIDE_INT. */
1229 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1230
1231 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1232 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1233 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1234 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1235 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1236 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1237 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1238 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1239 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1240 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1241
1242 /* 1 if RTX is a label_ref for a nonlocal label. */
1243 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1244 REG_LABEL_TARGET note. */
1245 #define LABEL_REF_NONLOCAL_P(RTX) \
1246 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1247
1248 /* 1 if RTX is a code_label that should always be considered to be needed. */
1249 #define LABEL_PRESERVE_P(RTX) \
1250 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1251
1252 /* During sched, 1 if RTX is an insn that must be scheduled together
1253 with the preceding insn. */
1254 #define SCHED_GROUP_P(RTX) \
1255 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1256 )->in_struct)
1257
1258 /* For a SET rtx, SET_DEST is the place that is set
1259 and SET_SRC is the value it is set to. */
1260 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1261 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1262 #define SET_IS_RETURN_P(RTX) \
1263 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1264
1265 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1266 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1267 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1268
1269 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1270 conditionally executing the code on, COND_EXEC_CODE is the code
1271 to execute if the condition is true. */
1272 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1273 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1274
1275 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1276 constants pool. */
1277 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1278 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1279
1280 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1281 tree constant pool. This information is private to varasm.c. */
1282 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1283 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1284 (RTX), SYMBOL_REF)->frame_related)
1285
1286 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1287 #define SYMBOL_REF_FLAG(RTX) \
1288 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1289
1290 /* 1 if RTX is a symbol_ref that has been the library function in
1291 emit_library_call. */
1292 #define SYMBOL_REF_USED(RTX) \
1293 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1294
1295 /* 1 if RTX is a symbol_ref for a weak symbol. */
1296 #define SYMBOL_REF_WEAK(RTX) \
1297 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1298
1299 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1300 SYMBOL_REF_CONSTANT. */
1301 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1302
1303 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1304 pool symbol. */
1305 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1306 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1307
1308 /* The tree (decl or constant) associated with the symbol, or null. */
1309 #define SYMBOL_REF_DECL(RTX) \
1310 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1311
1312 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1313 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1314 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1315
1316 /* The rtx constant pool entry for a symbol, or null. */
1317 #define SYMBOL_REF_CONSTANT(RTX) \
1318 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1319
1320 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1321 information derivable from the tree decl associated with this symbol.
1322 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1323 decl. In some cases this is a bug. But beyond that, it's nice to cache
1324 this information to avoid recomputing it. Finally, this allows space for
1325 the target to store more than one bit of information, as with
1326 SYMBOL_REF_FLAG. */
1327 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1328
1329 /* These flags are common enough to be defined for all targets. They
1330 are computed by the default version of targetm.encode_section_info. */
1331
1332 /* Set if this symbol is a function. */
1333 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1334 #define SYMBOL_REF_FUNCTION_P(RTX) \
1335 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1336 /* Set if targetm.binds_local_p is true. */
1337 #define SYMBOL_FLAG_LOCAL (1 << 1)
1338 #define SYMBOL_REF_LOCAL_P(RTX) \
1339 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1340 /* Set if targetm.in_small_data_p is true. */
1341 #define SYMBOL_FLAG_SMALL (1 << 2)
1342 #define SYMBOL_REF_SMALL_P(RTX) \
1343 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1344 /* The three-bit field at [5:3] is true for TLS variables; use
1345 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1346 #define SYMBOL_FLAG_TLS_SHIFT 3
1347 #define SYMBOL_REF_TLS_MODEL(RTX) \
1348 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1349 /* Set if this symbol is not defined in this translation unit. */
1350 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1351 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1352 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1353 /* Set if this symbol has a block_symbol structure associated with it. */
1354 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1355 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1356 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1357 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1358 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1359 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1360 #define SYMBOL_REF_ANCHOR_P(RTX) \
1361 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1362
1363 /* Subsequent bits are available for the target to use. */
1364 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1365 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1366
1367 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1368 structure to which the symbol belongs, or NULL if it has not been
1369 assigned a block. */
1370 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1371
1372 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1373 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1374 RTX has not yet been assigned to a block, or it has not been given an
1375 offset within that block. */
1376 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1377
1378 /* Indicate whether the machine has any sort of auto increment addressing.
1379 If not, we can avoid checking for REG_INC notes. */
1380
1381 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1382 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1383 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1384 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1385 #define AUTO_INC_DEC
1386 #endif
1387
1388 /* Define a macro to look for REG_INC notes,
1389 but save time on machines where they never exist. */
1390
1391 #ifdef AUTO_INC_DEC
1392 #define FIND_REG_INC_NOTE(INSN, REG) \
1393 ((REG) != NULL_RTX && REG_P ((REG)) \
1394 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1395 : find_reg_note ((INSN), REG_INC, (REG)))
1396 #else
1397 #define FIND_REG_INC_NOTE(INSN, REG) 0
1398 #endif
1399
1400 #ifndef HAVE_PRE_INCREMENT
1401 #define HAVE_PRE_INCREMENT 0
1402 #endif
1403
1404 #ifndef HAVE_PRE_DECREMENT
1405 #define HAVE_PRE_DECREMENT 0
1406 #endif
1407
1408 #ifndef HAVE_POST_INCREMENT
1409 #define HAVE_POST_INCREMENT 0
1410 #endif
1411
1412 #ifndef HAVE_POST_DECREMENT
1413 #define HAVE_POST_DECREMENT 0
1414 #endif
1415
1416 #ifndef HAVE_POST_MODIFY_DISP
1417 #define HAVE_POST_MODIFY_DISP 0
1418 #endif
1419
1420 #ifndef HAVE_POST_MODIFY_REG
1421 #define HAVE_POST_MODIFY_REG 0
1422 #endif
1423
1424 #ifndef HAVE_PRE_MODIFY_DISP
1425 #define HAVE_PRE_MODIFY_DISP 0
1426 #endif
1427
1428 #ifndef HAVE_PRE_MODIFY_REG
1429 #define HAVE_PRE_MODIFY_REG 0
1430 #endif
1431
1432
1433 /* Some architectures do not have complete pre/post increment/decrement
1434 instruction sets, or only move some modes efficiently. These macros
1435 allow us to tune autoincrement generation. */
1436
1437 #ifndef USE_LOAD_POST_INCREMENT
1438 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1439 #endif
1440
1441 #ifndef USE_LOAD_POST_DECREMENT
1442 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1443 #endif
1444
1445 #ifndef USE_LOAD_PRE_INCREMENT
1446 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1447 #endif
1448
1449 #ifndef USE_LOAD_PRE_DECREMENT
1450 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1451 #endif
1452
1453 #ifndef USE_STORE_POST_INCREMENT
1454 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1455 #endif
1456
1457 #ifndef USE_STORE_POST_DECREMENT
1458 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1459 #endif
1460
1461 #ifndef USE_STORE_PRE_INCREMENT
1462 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1463 #endif
1464
1465 #ifndef USE_STORE_PRE_DECREMENT
1466 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1467 #endif
1468 \f
1469 /* Nonzero when we are generating CONCATs. */
1470 extern int generating_concat_p;
1471
1472 /* Nonzero when we are expanding trees to RTL. */
1473 extern int currently_expanding_to_rtl;
1474
1475 /* Generally useful functions. */
1476
1477 /* In expmed.c */
1478 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1479
1480 /* In explow.c */
1481 extern void set_stack_check_libfunc (rtx);
1482 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1483 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1484
1485 /* In emit-rtl.c */
1486 extern rtx gen_blockage (void);
1487 extern rtvec gen_rtvec (int, ...);
1488 extern rtx copy_insn_1 (rtx);
1489 extern rtx copy_insn (rtx);
1490 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1491 extern rtx emit_copy_of_insn_after (rtx, rtx);
1492 extern void set_reg_attrs_from_value (rtx, rtx);
1493 extern void set_reg_attrs_for_parm (rtx, rtx);
1494 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1495 extern void adjust_reg_mode (rtx, enum machine_mode);
1496 extern int mem_expr_equal_p (const_tree, const_tree);
1497
1498 /* In rtl.c */
1499 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1500 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1501
1502 extern rtvec rtvec_alloc (int);
1503 extern bool shared_const_p (const_rtx);
1504 extern rtx copy_rtx (rtx);
1505 extern void dump_rtx_statistics (void);
1506
1507 /* In emit-rtl.c */
1508 extern rtx copy_rtx_if_shared (rtx);
1509
1510 /* In rtl.c */
1511 extern unsigned int rtx_size (const_rtx);
1512 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1513 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1514 extern int rtx_equal_p (const_rtx, const_rtx);
1515
1516 /* In emit-rtl.c */
1517 extern rtvec gen_rtvec_v (int, rtx *);
1518 extern rtx gen_reg_rtx (enum machine_mode);
1519 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1520 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1521 extern rtx gen_reg_rtx_and_attrs (rtx);
1522 extern rtx gen_label_rtx (void);
1523 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1524
1525 /* In cse.c */
1526 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1527
1528 /* In emit-rtl.c */
1529 extern rtx gen_highpart (enum machine_mode, rtx);
1530 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1531 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1532
1533 /* In emit-rtl.c */
1534 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1535 extern int subreg_lowpart_p (const_rtx);
1536 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1537 enum machine_mode);
1538 extern unsigned int subreg_highpart_offset (enum machine_mode,
1539 enum machine_mode);
1540 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1541 extern rtx make_safe_from (rtx, rtx);
1542 extern rtx convert_memory_address (enum machine_mode, rtx);
1543 extern rtx get_insns (void);
1544 extern const char *get_insn_name (int);
1545 extern rtx get_last_insn (void);
1546 extern rtx get_last_insn_anywhere (void);
1547 extern rtx get_first_nonnote_insn (void);
1548 extern rtx get_last_nonnote_insn (void);
1549 extern void start_sequence (void);
1550 extern void push_to_sequence (rtx);
1551 extern void push_to_sequence2 (rtx, rtx);
1552 extern void end_sequence (void);
1553 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1554 enum machine_mode);
1555
1556 /* In loop-iv.c */
1557
1558 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1559
1560 /* In varasm.c */
1561 extern rtx force_const_mem (enum machine_mode, rtx);
1562
1563 /* In varasm.c */
1564
1565 struct function;
1566 extern rtx get_pool_constant (rtx);
1567 extern rtx get_pool_constant_mark (rtx, bool *);
1568 extern enum machine_mode get_pool_mode (const_rtx);
1569 extern rtx simplify_subtraction (rtx);
1570
1571 /* In function.c */
1572 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1573 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1574 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1575 extern rtx assign_stack_temp_for_type (enum machine_mode,
1576 HOST_WIDE_INT, int, tree);
1577 extern rtx assign_temp (tree, int, int, int);
1578
1579 /* In emit-rtl.c */
1580 extern rtx emit_insn_before (rtx, rtx);
1581 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1582 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1583 extern rtx emit_jump_insn_before (rtx, rtx);
1584 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1585 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1586 extern rtx emit_call_insn_before (rtx, rtx);
1587 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1588 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1589 extern rtx emit_barrier_before (rtx);
1590 extern rtx emit_label_before (rtx, rtx);
1591 extern rtx emit_note_before (enum insn_note, rtx);
1592 extern rtx emit_insn_after (rtx, rtx);
1593 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1594 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1595 extern rtx emit_jump_insn_after (rtx, rtx);
1596 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1597 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1598 extern rtx emit_call_insn_after (rtx, rtx);
1599 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1600 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1601 extern rtx emit_barrier_after (rtx);
1602 extern rtx emit_label_after (rtx, rtx);
1603 extern rtx emit_note_after (enum insn_note, rtx);
1604 extern rtx emit_insn (rtx);
1605 extern rtx emit_jump_insn (rtx);
1606 extern rtx emit_call_insn (rtx);
1607 extern rtx emit_label (rtx);
1608 extern rtx emit_barrier (void);
1609 extern rtx emit_note (enum insn_note);
1610 extern rtx emit_note_copy (rtx);
1611 extern rtx gen_clobber (rtx);
1612 extern rtx emit_clobber (rtx);
1613 extern rtx gen_use (rtx);
1614 extern rtx emit_use (rtx);
1615 extern rtx make_insn_raw (rtx);
1616 extern rtx make_jump_insn_raw (rtx);
1617 extern void add_function_usage_to (rtx, rtx);
1618 extern rtx last_call_insn (void);
1619 extern rtx previous_insn (rtx);
1620 extern rtx next_insn (rtx);
1621 extern rtx prev_nonnote_insn (rtx);
1622 extern rtx next_nonnote_insn (rtx);
1623 extern rtx prev_real_insn (rtx);
1624 extern rtx next_real_insn (rtx);
1625 extern rtx prev_active_insn (rtx);
1626 extern rtx next_active_insn (rtx);
1627 extern int active_insn_p (const_rtx);
1628 extern rtx prev_label (rtx);
1629 extern rtx next_label (rtx);
1630 extern rtx skip_consecutive_labels (rtx);
1631 extern rtx next_cc0_user (rtx);
1632 extern rtx prev_cc0_setter (rtx);
1633
1634 /* In cfglayout.c */
1635 extern int insn_line (const_rtx);
1636 extern const char * insn_file (const_rtx);
1637 extern location_t locator_location (int);
1638 extern int locator_line (int);
1639 extern const char * locator_file (int);
1640 extern bool locator_eq (int, int);
1641 extern int prologue_locator, epilogue_locator;
1642
1643 /* In jump.c */
1644 extern enum rtx_code reverse_condition (enum rtx_code);
1645 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1646 extern enum rtx_code swap_condition (enum rtx_code);
1647 extern enum rtx_code unsigned_condition (enum rtx_code);
1648 extern enum rtx_code signed_condition (enum rtx_code);
1649 extern void mark_jump_label (rtx, rtx, int);
1650 extern unsigned int cleanup_barriers (void);
1651
1652 /* In jump.c */
1653 extern rtx delete_related_insns (rtx);
1654
1655 /* In recog.c */
1656 extern rtx *find_constant_term_loc (rtx *);
1657
1658 /* In emit-rtl.c */
1659 extern rtx try_split (rtx, rtx, int);
1660 extern int split_branch_probability;
1661
1662 /* In unknown file */
1663 extern rtx split_insns (rtx, rtx);
1664
1665 /* In simplify-rtx.c */
1666 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1667 rtx, enum machine_mode);
1668 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1669 enum machine_mode);
1670 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1671 rtx, rtx);
1672 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1673 rtx);
1674 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1675 enum machine_mode, rtx, rtx, rtx);
1676 extern rtx simplify_const_relational_operation (enum rtx_code,
1677 enum machine_mode, rtx, rtx);
1678 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1679 enum machine_mode, rtx, rtx);
1680 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1681 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1682 enum machine_mode);
1683 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1684 enum machine_mode, rtx, rtx, rtx);
1685 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1686 enum machine_mode, rtx, rtx);
1687 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1688 unsigned int);
1689 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1690 unsigned int);
1691 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1692 extern rtx simplify_rtx (const_rtx);
1693 extern rtx avoid_constant_pool_reference (rtx);
1694 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1695
1696 /* In reginfo.c */
1697 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1698 bool);
1699
1700 /* In emit-rtl.c */
1701 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1702 extern void set_insn_deleted (rtx);
1703
1704 /* Functions in rtlanal.c */
1705
1706 /* Single set is implemented as macro for performance reasons. */
1707 #define single_set(I) (INSN_P (I) \
1708 ? (GET_CODE (PATTERN (I)) == SET \
1709 ? PATTERN (I) : single_set_1 (I)) \
1710 : NULL_RTX)
1711 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1712
1713 /* Structure used for passing data to REPLACE_LABEL. */
1714 typedef struct replace_label_data
1715 {
1716 rtx r1;
1717 rtx r2;
1718 bool update_label_nuses;
1719 } replace_label_data;
1720
1721 extern int rtx_addr_can_trap_p (const_rtx);
1722 extern bool nonzero_address_p (const_rtx);
1723 extern int rtx_unstable_p (const_rtx);
1724 extern bool rtx_varies_p (const_rtx, bool);
1725 extern bool rtx_addr_varies_p (const_rtx, bool);
1726 extern HOST_WIDE_INT get_integer_term (const_rtx);
1727 extern rtx get_related_value (const_rtx);
1728 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1729 extern void split_const (rtx, rtx *, rtx *);
1730 extern int reg_mentioned_p (const_rtx, const_rtx);
1731 extern int count_occurrences (const_rtx, const_rtx, int);
1732 extern int reg_referenced_p (const_rtx, const_rtx);
1733 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1734 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1735 extern int commutative_operand_precedence (rtx);
1736 extern bool swap_commutative_operands_p (rtx, rtx);
1737 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1738 extern int no_labels_between_p (const_rtx, const_rtx);
1739 extern int modified_in_p (const_rtx, const_rtx);
1740 extern int reg_set_p (const_rtx, const_rtx);
1741 extern rtx single_set_2 (const_rtx, const_rtx);
1742 extern int multiple_sets (const_rtx);
1743 extern int set_noop_p (const_rtx);
1744 extern int noop_move_p (const_rtx);
1745 extern rtx find_last_value (rtx, rtx *, rtx, int);
1746 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1747 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1748 extern const_rtx set_of (const_rtx, const_rtx);
1749 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1750 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1751 extern int dead_or_set_p (const_rtx, const_rtx);
1752 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1753 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1754 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1755 extern rtx find_reg_equal_equiv_note (const_rtx);
1756 extern rtx find_constant_src (const_rtx);
1757 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1758 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1759 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1760 extern void add_reg_note (rtx, enum reg_note, rtx);
1761 extern void remove_note (rtx, const_rtx);
1762 extern void remove_reg_equal_equiv_notes (rtx);
1763 extern int side_effects_p (const_rtx);
1764 extern int volatile_refs_p (const_rtx);
1765 extern int volatile_insn_p (const_rtx);
1766 extern int may_trap_p_1 (const_rtx, unsigned);
1767 extern int may_trap_p (const_rtx);
1768 extern int may_trap_or_fault_p (const_rtx);
1769 extern int inequality_comparisons_p (const_rtx);
1770 extern rtx replace_rtx (rtx, rtx, rtx);
1771 extern int replace_label (rtx *, void *);
1772 extern int rtx_referenced_p (rtx, rtx);
1773 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1774 extern int computed_jump_p (const_rtx);
1775
1776 typedef int (*rtx_function) (rtx *, void *);
1777 extern int for_each_rtx (rtx *, rtx_function, void *);
1778
1779 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1780 rtx *, rtx *);
1781 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1782 rtx_equal_p_callback_function);
1783
1784 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1785 enum machine_mode *);
1786 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1787 bool, hash_rtx_callback_function);
1788
1789 extern rtx regno_use_in (unsigned int, rtx);
1790 extern int auto_inc_p (const_rtx);
1791 extern int in_expr_list_p (const_rtx, const_rtx);
1792 extern void remove_node_from_expr_list (const_rtx, rtx *);
1793 extern int loc_mentioned_in_p (rtx *, const_rtx);
1794 extern rtx find_first_parameter_load (rtx, rtx);
1795 extern bool keep_with_call_p (const_rtx);
1796 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1797 extern int insn_rtx_cost (rtx, bool);
1798
1799 /* Given an insn and condition, return a canonical description of
1800 the test being made. */
1801 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1802
1803 /* Given a JUMP_INSN, return a canonical description of the test
1804 being made. */
1805 extern rtx get_condition (rtx, rtx *, int, int);
1806
1807 /* Information about a subreg of a hard register. */
1808 struct subreg_info
1809 {
1810 /* Offset of first hard register involved in the subreg. */
1811 int offset;
1812 /* Number of hard registers involved in the subreg. */
1813 int nregs;
1814 /* Whether this subreg can be represented as a hard reg with the new
1815 mode. */
1816 bool representable_p;
1817 };
1818
1819 extern void subreg_get_info (unsigned int, enum machine_mode,
1820 unsigned int, enum machine_mode,
1821 struct subreg_info *);
1822
1823 /* lists.c */
1824
1825 extern void free_EXPR_LIST_list (rtx *);
1826 extern void free_INSN_LIST_list (rtx *);
1827 extern void free_EXPR_LIST_node (rtx);
1828 extern void free_INSN_LIST_node (rtx);
1829 extern rtx alloc_INSN_LIST (rtx, rtx);
1830 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1831 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1832 extern rtx remove_list_elem (rtx, rtx *);
1833 extern rtx remove_free_INSN_LIST_node (rtx *);
1834 extern rtx remove_free_EXPR_LIST_node (rtx *);
1835
1836
1837 /* reginfo.c */
1838
1839 /* Initialize may_move_cost and friends for mode M. */
1840 extern void init_move_cost (enum machine_mode);
1841 /* Allocate register info memory. */
1842 extern void allocate_reg_info (void);
1843 /* Resize reg info. */
1844 extern void resize_reg_info (void);
1845 /* Free up register info memory. */
1846 extern void free_reg_info (void);
1847
1848 /* recog.c */
1849 extern int asm_noperands (const_rtx);
1850 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1851 enum machine_mode *, location_t *);
1852
1853 extern enum reg_class reg_preferred_class (int);
1854 extern enum reg_class reg_alternate_class (int);
1855 extern void setup_reg_classes (int, enum reg_class, enum reg_class);
1856
1857 extern void split_all_insns (void);
1858 extern unsigned int split_all_insns_noflow (void);
1859
1860 #define MAX_SAVED_CONST_INT 64
1861 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1862
1863 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1864 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1865 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1866 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1867 extern GTY(()) rtx const_true_rtx;
1868
1869 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1870
1871 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1872 same as VOIDmode. */
1873
1874 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1875
1876 /* Likewise, for the constants 1 and 2. */
1877
1878 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1879 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1880
1881 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1882 is used to represent the frame pointer. This is because the
1883 hard frame pointer and the automatic variables are separated by an amount
1884 that cannot be determined until after register allocation. We can assume
1885 that in this case ELIMINABLE_REGS will be defined, one action of which
1886 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1887 #ifndef HARD_FRAME_POINTER_REGNUM
1888 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1889 #endif
1890
1891 /* Index labels for global_rtl. */
1892 enum global_rtl_index
1893 {
1894 GR_PC,
1895 GR_CC0,
1896 GR_STACK_POINTER,
1897 GR_FRAME_POINTER,
1898 /* For register elimination to work properly these hard_frame_pointer_rtx,
1899 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1900 the same register. */
1901 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1902 GR_ARG_POINTER = GR_FRAME_POINTER,
1903 #endif
1904 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1905 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1906 #else
1907 GR_HARD_FRAME_POINTER,
1908 #endif
1909 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1910 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1911 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1912 #else
1913 GR_ARG_POINTER,
1914 #endif
1915 #endif
1916 GR_VIRTUAL_INCOMING_ARGS,
1917 GR_VIRTUAL_STACK_ARGS,
1918 GR_VIRTUAL_STACK_DYNAMIC,
1919 GR_VIRTUAL_OUTGOING_ARGS,
1920 GR_VIRTUAL_CFA,
1921
1922 GR_MAX
1923 };
1924
1925 /* Pointers to standard pieces of rtx are stored here. */
1926 extern GTY(()) rtx global_rtl[GR_MAX];
1927
1928 /* Standard pieces of rtx, to be substituted directly into things. */
1929 #define pc_rtx (global_rtl[GR_PC])
1930 #define cc0_rtx (global_rtl[GR_CC0])
1931
1932 /* All references to certain hard regs, except those created
1933 by allocating pseudo regs into them (when that's possible),
1934 go through these unique rtx objects. */
1935 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1936 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1937 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1938 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1939
1940 extern GTY(()) rtx pic_offset_table_rtx;
1941 extern GTY(()) rtx static_chain_rtx;
1942 extern GTY(()) rtx static_chain_incoming_rtx;
1943 extern GTY(()) rtx return_address_pointer_rtx;
1944
1945 /* Include the RTL generation functions. */
1946
1947 #ifndef GENERATOR_FILE
1948 #include "genrtl.h"
1949 #undef gen_rtx_ASM_INPUT
1950 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
1951 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
1952 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
1953 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
1954 #endif
1955
1956 /* There are some RTL codes that require special attention; the
1957 generation functions included above do the raw handling. If you
1958 add to this list, modify special_rtx in gengenrtl.c as well. */
1959
1960 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1961 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1962 extern rtx gen_raw_REG (enum machine_mode, int);
1963 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1964 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1965 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1966
1967 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1968
1969 /* Virtual registers are used during RTL generation to refer to locations into
1970 the stack frame when the actual location isn't known until RTL generation
1971 is complete. The routine instantiate_virtual_regs replaces these with
1972 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1973 a constant. */
1974
1975 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1976
1977 /* This points to the first word of the incoming arguments passed on the stack,
1978 either by the caller or by the callee when pretending it was passed by the
1979 caller. */
1980
1981 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1982
1983 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1984
1985 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1986 variable on the stack. Otherwise, it points to the first variable on
1987 the stack. */
1988
1989 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1990
1991 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1992
1993 /* This points to the location of dynamically-allocated memory on the stack
1994 immediately after the stack pointer has been adjusted by the amount
1995 desired. */
1996
1997 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1998
1999 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2000
2001 /* This points to the location in the stack at which outgoing arguments should
2002 be written when the stack is pre-pushed (arguments pushed using push
2003 insns always use sp). */
2004
2005 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2006
2007 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2008
2009 /* This points to the Canonical Frame Address of the function. This
2010 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2011 but is calculated relative to the arg pointer for simplicity; the
2012 frame pointer nor stack pointer are necessarily fixed relative to
2013 the CFA until after reload. */
2014
2015 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2016
2017 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2018
2019 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2020
2021 /* Nonzero if REGNUM is a pointer into the stack frame. */
2022 #define REGNO_PTR_FRAME_P(REGNUM) \
2023 ((REGNUM) == STACK_POINTER_REGNUM \
2024 || (REGNUM) == FRAME_POINTER_REGNUM \
2025 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2026 || (REGNUM) == ARG_POINTER_REGNUM \
2027 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2028 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2029
2030 /* REGNUM never really appearing in the INSN stream. */
2031 #define INVALID_REGNUM (~(unsigned int) 0)
2032
2033 extern rtx output_constant_def (tree, int);
2034 extern rtx lookup_constant_def (tree);
2035
2036 /* Nonzero after end of reload pass.
2037 Set to 1 or 0 by reload1.c. */
2038
2039 extern int reload_completed;
2040
2041 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2042 extern int epilogue_completed;
2043
2044 /* Set to 1 while reload_as_needed is operating.
2045 Required by some machines to handle any generated moves differently. */
2046
2047 extern int reload_in_progress;
2048
2049 /* This macro indicates whether you may create a new
2050 pseudo-register. */
2051
2052 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2053
2054 #ifdef STACK_REGS
2055 /* Nonzero after end of regstack pass.
2056 Set to 1 or 0 by reg-stack.c. */
2057 extern int regstack_completed;
2058 #endif
2059
2060 /* If this is nonzero, we do not bother generating VOLATILE
2061 around volatile memory references, and we are willing to
2062 output indirect addresses. If cse is to follow, we reject
2063 indirect addresses so a useful potential cse is generated;
2064 if it is used only once, instruction combination will produce
2065 the same indirect address eventually. */
2066 extern int cse_not_expected;
2067
2068 /* Translates rtx code to tree code, for those codes needed by
2069 REAL_ARITHMETIC. The function returns an int because the caller may not
2070 know what `enum tree_code' means. */
2071
2072 extern int rtx_to_tree_code (enum rtx_code);
2073
2074 /* In cse.c */
2075 extern int delete_trivially_dead_insns (rtx, int);
2076 extern int cse_main (rtx, int);
2077 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2078 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2079
2080 /* In jump.c */
2081 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2082 extern int condjump_p (const_rtx);
2083 extern int any_condjump_p (const_rtx);
2084 extern int any_uncondjump_p (const_rtx);
2085 extern rtx pc_set (const_rtx);
2086 extern rtx condjump_label (const_rtx);
2087 extern int simplejump_p (const_rtx);
2088 extern int returnjump_p (rtx);
2089 extern int onlyjump_p (const_rtx);
2090 extern int only_sets_cc0_p (const_rtx);
2091 extern int sets_cc0_p (const_rtx);
2092 extern int invert_jump_1 (rtx, rtx);
2093 extern int invert_jump (rtx, rtx, int);
2094 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2095 extern int true_regnum (const_rtx);
2096 extern unsigned int reg_or_subregno (const_rtx);
2097 extern int redirect_jump_1 (rtx, rtx);
2098 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2099 extern int redirect_jump (rtx, rtx, int);
2100 extern void rebuild_jump_labels (rtx);
2101 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2102 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2103 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2104 const_rtx, const_rtx);
2105 extern void delete_for_peephole (rtx, rtx);
2106 extern int condjump_in_parallel_p (const_rtx);
2107
2108 /* In emit-rtl.c. */
2109 extern int max_reg_num (void);
2110 extern int max_label_num (void);
2111 extern int get_first_label_num (void);
2112 extern void maybe_set_first_label_num (rtx);
2113 extern void delete_insns_since (rtx);
2114 extern void mark_reg_pointer (rtx, int);
2115 extern void mark_user_reg (rtx);
2116 extern void reset_used_flags (rtx);
2117 extern void set_used_flags (rtx);
2118 extern void reorder_insns (rtx, rtx, rtx);
2119 extern void reorder_insns_nobb (rtx, rtx, rtx);
2120 extern int get_max_uid (void);
2121 extern int in_sequence_p (void);
2122 extern void force_next_line_note (void);
2123 extern void init_emit (void);
2124 extern void init_emit_regs (void);
2125 extern void init_emit_once (int);
2126 extern void push_topmost_sequence (void);
2127 extern void pop_topmost_sequence (void);
2128 extern void set_new_first_and_last_insn (rtx, rtx);
2129 extern unsigned int unshare_all_rtl (void);
2130 extern void unshare_all_rtl_again (rtx);
2131 extern void unshare_all_rtl_in_chain (rtx);
2132 extern void verify_rtl_sharing (void);
2133 extern void set_first_insn (rtx);
2134 extern void set_last_insn (rtx);
2135 extern void link_cc0_insns (rtx);
2136 extern void add_insn (rtx);
2137 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2138 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2139 extern void remove_insn (rtx);
2140 extern rtx emit (rtx);
2141 extern rtx delete_insn (rtx);
2142 extern rtx entry_of_function (void);
2143 extern void emit_insn_at_entry (rtx);
2144 extern void delete_insn_chain (rtx, rtx, bool);
2145 extern rtx unlink_insn_chain (rtx, rtx);
2146 extern rtx delete_insn_and_edges (rtx);
2147 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2148 extern rtx gen_const_mem (enum machine_mode, rtx);
2149 extern rtx gen_frame_mem (enum machine_mode, rtx);
2150 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2151 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2152 const_rtx, unsigned int);
2153
2154 /* In combine.c */
2155 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2156 extern rtx remove_death (unsigned int, rtx);
2157 extern void dump_combine_stats (FILE *);
2158 extern void dump_combine_total_stats (FILE *);
2159
2160 /* In cfgcleanup.c */
2161 extern void delete_dead_jumptables (void);
2162
2163 /* In sched-vis.c. */
2164 extern void debug_bb_n_slim (int);
2165 extern void debug_bb_slim (struct basic_block_def *);
2166 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2167 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2168 extern void dump_insn_slim (FILE *f, rtx x);
2169 extern void debug_insn_slim (rtx x);
2170
2171 /* In sched-rgn.c. */
2172 extern void schedule_insns (void);
2173
2174 /* In sched-ebb.c. */
2175 extern void schedule_ebbs (void);
2176
2177 /* In haifa-sched.c. */
2178 extern void fix_sched_param (const char *, const char *);
2179
2180 /* In sel-sched-dump.c. */
2181 extern void sel_sched_fix_param (const char *param, const char *val);
2182
2183 /* In print-rtl.c */
2184 extern const char *print_rtx_head;
2185 extern void debug_rtx (const_rtx);
2186 extern void debug_rtx_list (const_rtx, int);
2187 extern void debug_rtx_range (const_rtx, const_rtx);
2188 extern const_rtx debug_rtx_find (const_rtx, int);
2189 extern void print_mem_expr (FILE *, const_tree);
2190 extern void print_rtl (FILE *, const_rtx);
2191 extern void print_simple_rtl (FILE *, const_rtx);
2192 extern int print_rtl_single (FILE *, const_rtx);
2193 extern void print_inline_rtx (FILE *, const_rtx, int);
2194
2195 /* In function.c */
2196 extern void reposition_prologue_and_epilogue_notes (void);
2197 extern int prologue_epilogue_contains (const_rtx);
2198 extern int sibcall_epilogue_contains (const_rtx);
2199 extern void mark_temp_addr_taken (rtx);
2200 extern void update_temp_slot_address (rtx, rtx);
2201
2202 /* In stmt.c */
2203 extern void expand_null_return (void);
2204 extern void expand_naked_return (void);
2205 extern void emit_jump (rtx);
2206
2207 /* In expr.c */
2208 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2209 unsigned int, int);
2210
2211 /* In cfgrtl.c */
2212 extern void print_rtl_with_bb (FILE *, const_rtx);
2213
2214 /* In cfg.c. */
2215 extern void dump_reg_info (FILE *);
2216 extern void dump_flow_info (FILE *, int);
2217
2218 /* In expmed.c */
2219 extern void init_expmed (void);
2220 extern void expand_inc (rtx, rtx);
2221 extern void expand_dec (rtx, rtx);
2222
2223 /* In gcse.c */
2224 extern bool can_copy_p (enum machine_mode);
2225 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2226 extern rtx fis_get_condition (rtx);
2227
2228 /* In ira.c */
2229 #ifdef HARD_CONST
2230 extern HARD_REG_SET eliminable_regset;
2231 #endif
2232 extern void mark_elimination (int, int);
2233
2234 /* In reginfo.c */
2235 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2236 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2237 extern void globalize_reg (int);
2238 extern void init_reg_modes_target (void);
2239 extern void init_regs (void);
2240 extern void reinit_regs (void);
2241 extern void init_fake_stack_mems (void);
2242 extern void save_register_info (void);
2243 extern void init_reg_sets (void);
2244 extern void regclass (rtx, int);
2245 extern void reg_scan (rtx, unsigned int);
2246 extern void fix_register (const char *, int, int);
2247 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2248 enum machine_mode);
2249
2250 /* In reorg.c */
2251 extern void dbr_schedule (rtx);
2252
2253 /* In reload1.c */
2254 extern int function_invariant_p (const_rtx);
2255
2256 /* In calls.c */
2257 enum libcall_type
2258 {
2259 LCT_NORMAL = 0,
2260 LCT_CONST = 1,
2261 LCT_PURE = 2,
2262 LCT_NORETURN = 3,
2263 LCT_THROW = 4,
2264 LCT_RETURNS_TWICE = 5
2265 };
2266
2267 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2268 ...);
2269 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2270 enum machine_mode, int, ...);
2271
2272 /* In varasm.c */
2273 extern void init_varasm_once (void);
2274 extern enum tls_model decl_default_tls_model (const_tree);
2275
2276 /* In rtl.c */
2277 extern void traverse_md_constants (int (*) (void **, void *), void *);
2278 struct md_constant { char *name, *value; };
2279
2280 /* In read-rtl.c */
2281 extern int read_skip_spaces (FILE *);
2282 extern bool read_rtx (FILE *, rtx *, int *);
2283 extern void copy_rtx_ptr_loc (const void *, const void *);
2284 extern void print_rtx_ptr_loc (const void *);
2285 extern const char *join_c_conditions (const char *, const char *);
2286 extern void print_c_condition (const char *);
2287 extern const char *read_rtx_filename;
2288 extern int read_rtx_lineno;
2289
2290 /* In alias.c */
2291 extern rtx canon_rtx (rtx);
2292 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2293 extern rtx get_addr (rtx);
2294 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2295 rtx, bool (*)(const_rtx, bool));
2296 extern int read_dependence (const_rtx, const_rtx);
2297 extern int anti_dependence (const_rtx, const_rtx);
2298 extern int output_dependence (const_rtx, const_rtx);
2299 extern void init_alias_target (void);
2300 extern void init_alias_analysis (void);
2301 extern void end_alias_analysis (void);
2302 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2303 extern rtx find_base_term (rtx);
2304 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2305 extern rtx get_reg_known_value (unsigned int);
2306 extern bool get_reg_known_equiv_p (unsigned int);
2307
2308 #ifdef STACK_REGS
2309 extern int stack_regs_mentioned (const_rtx insn);
2310 #endif
2311
2312 /* In toplev.c */
2313 extern GTY(()) rtx stack_limit_rtx;
2314
2315 /* In predict.c */
2316 extern void invert_br_probabilities (rtx);
2317 extern bool expensive_function_p (int);
2318 /* In cfgexpand.c */
2319 extern void add_reg_br_prob_note (rtx last, int probability);
2320
2321 /* In var-tracking.c */
2322 extern unsigned int variable_tracking_main (void);
2323
2324 /* In stor-layout.c. */
2325 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2326 rtx *, rtx *);
2327
2328 /* In loop-unswitch.c */
2329 extern rtx reversed_condition (rtx);
2330 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2331
2332 /* In loop-iv.c */
2333 extern rtx canon_condition (rtx);
2334 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2335
2336 /* In final.c */
2337 extern unsigned int compute_alignments (void);
2338 \f
2339 struct rtl_hooks
2340 {
2341 rtx (*gen_lowpart) (enum machine_mode, rtx);
2342 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2343 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2344 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2345 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2346 unsigned int, unsigned int *);
2347 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2348
2349 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2350 };
2351
2352 /* Each pass can provide its own. */
2353 extern struct rtl_hooks rtl_hooks;
2354
2355 /* ... but then it has to restore these. */
2356 extern const struct rtl_hooks general_rtl_hooks;
2357
2358 /* Keep this for the nonce. */
2359 #define gen_lowpart rtl_hooks.gen_lowpart
2360
2361 extern void insn_locators_alloc (void);
2362 extern void insn_locators_free (void);
2363 extern void insn_locators_finalize (void);
2364 extern void set_curr_insn_source_location (location_t);
2365 extern void set_curr_insn_block (tree);
2366 extern int curr_insn_locator (void);
2367 extern bool optimize_insn_for_size_p (void);
2368 extern bool optimize_insn_for_speed_p (void);
2369
2370 #endif /* ! GCC_RTL_H */
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