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2009-12-15 Paolo Bonzini <bonzini@gnu.org>
[official-gcc.git] / gcc / rtl.h
blob960237cec5302040360d151aa2ef86966e55fb77
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 unsigned char addrspace; /* Address space (0 for generic). */
150 } mem_attrs;
151
152 /* Structure used to describe the attributes of a REG in similar way as
153 mem_attrs does for MEM above. Note that the OFFSET field is calculated
154 in the same way as for mem_attrs, rather than in the same way as a
155 SUBREG_BYTE. For example, if a big-endian target stores a byte
156 object in the low part of a 4-byte register, the OFFSET field
157 will be -3 rather than 0. */
158
159 typedef struct GTY(()) reg_attrs {
160 tree decl; /* decl corresponding to REG. */
161 HOST_WIDE_INT offset; /* Offset from start of DECL. */
162 } reg_attrs;
163
164 /* Common union for an element of an rtx. */
165
166 union rtunion_def
167 {
168 int rt_int;
169 unsigned int rt_uint;
170 const char *rt_str;
171 rtx rt_rtx;
172 rtvec rt_rtvec;
173 enum machine_mode rt_type;
174 addr_diff_vec_flags rt_addr_diff_vec_flags;
175 struct cselib_val_struct *rt_cselib;
176 struct bitmap_head_def *rt_bit;
177 tree rt_tree;
178 struct basic_block_def *rt_bb;
179 mem_attrs *rt_mem;
180 reg_attrs *rt_reg;
181 struct constant_descriptor_rtx *rt_constant;
182 };
183 typedef union rtunion_def rtunion;
184
185 /* This structure remembers the position of a SYMBOL_REF within an
186 object_block structure. A SYMBOL_REF only provides this information
187 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
188 struct GTY(()) block_symbol {
189 /* The usual SYMBOL_REF fields. */
190 rtunion GTY ((skip)) fld[3];
191
192 /* The block that contains this object. */
193 struct object_block *block;
194
195 /* The offset of this object from the start of its block. It is negative
196 if the symbol has not yet been assigned an offset. */
197 HOST_WIDE_INT offset;
198 };
199
200 DEF_VEC_P(rtx);
201 DEF_VEC_ALLOC_P(rtx,heap);
202 DEF_VEC_ALLOC_P(rtx,gc);
203
204 /* Describes a group of objects that are to be placed together in such
205 a way that their relative positions are known. */
206 struct GTY(()) object_block {
207 /* The section in which these objects should be placed. */
208 section *sect;
209
210 /* The alignment of the first object, measured in bits. */
211 unsigned int alignment;
212
213 /* The total size of the objects, measured in bytes. */
214 HOST_WIDE_INT size;
215
216 /* The SYMBOL_REFs for each object. The vector is sorted in
217 order of increasing offset and the following conditions will
218 hold for each element X:
219
220 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
221 !SYMBOL_REF_ANCHOR_P (X)
222 SYMBOL_REF_BLOCK (X) == [address of this structure]
223 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
224 VEC(rtx,gc) *objects;
225
226 /* All the anchor SYMBOL_REFs used to address these objects, sorted
227 in order of increasing offset, and then increasing TLS model.
228 The following conditions will hold for each element X in this vector:
229
230 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
231 SYMBOL_REF_ANCHOR_P (X)
232 SYMBOL_REF_BLOCK (X) == [address of this structure]
233 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
234 VEC(rtx,gc) *anchors;
235 };
236
237 /* RTL expression ("rtx"). */
238
239 struct GTY((chain_next ("RTX_NEXT (&%h)"),
240 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
241 /* The kind of expression this is. */
242 ENUM_BITFIELD(rtx_code) code: 16;
243
244 /* The kind of value the expression has. */
245 ENUM_BITFIELD(machine_mode) mode : 8;
246
247 /* 1 in a MEM if we should keep the alias set for this mem unchanged
248 when we access a component.
249 1 in a CALL_INSN if it is a sibling call.
250 1 in a SET that is for a return.
251 In a CODE_LABEL, part of the two-bit alternate entry field. */
252 unsigned int jump : 1;
253 /* In a CODE_LABEL, part of the two-bit alternate entry field.
254 1 in a MEM if it cannot trap.
255 1 in a CALL_INSN logically equivalent to
256 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
257 unsigned int call : 1;
258 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
259 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
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 used for SUBREG_PROMOTED_UNSIGNED_P.
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 In a PREFETCH, this flag indicates that it should be considered a scheduling
276 barrier. */
277 unsigned int volatil : 1;
278 /* 1 in a MEM referring to a field of an aggregate.
279 0 if the MEM was a variable or the result of a * operator in C;
280 1 if it was the result of a . or -> operator (on a struct) in C.
281 1 in a REG if the register is used only in exit code a loop.
282 1 in a SUBREG expression if was generated from a variable with a
283 promoted mode.
284 1 in a CODE_LABEL if the label is used for nonlocal gotos
285 and must not be deleted even if its count is zero.
286 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
287 together with the preceding insn. Valid only within sched.
288 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
289 from the target of a branch. Valid from reorg until end of compilation;
290 cleared before used. */
291 unsigned int in_struct : 1;
292 /* At the end of RTL generation, 1 if this rtx is used. This is used for
293 copying shared structure. See `unshare_all_rtl'.
294 In a REG, this is not needed for that purpose, and used instead
295 in `leaf_renumber_regs_insn'.
296 1 in a SYMBOL_REF, means that emit_library_call
297 has used it as the function. */
298 unsigned int used : 1;
299 /* 1 in an INSN or a SET if this rtx is related to the call frame,
300 either changing how we compute the frame address or saving and
301 restoring registers in the prologue and epilogue.
302 1 in a REG or MEM if it is a pointer.
303 1 in a SYMBOL_REF if it addresses something in the per-function
304 constant string pool. */
305 unsigned frame_related : 1;
306 /* 1 in a REG or PARALLEL that is the current function's return value.
307 1 in a MEM if it refers to a scalar.
308 1 in a SYMBOL_REF for a weak symbol.
309 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
310 unsigned return_val : 1;
311
312 /* The first element of the operands of this rtx.
313 The number of operands and their types are controlled
314 by the `code' field, according to rtl.def. */
315 union u {
316 rtunion fld[1];
317 HOST_WIDE_INT hwint[1];
318 struct block_symbol block_sym;
319 struct real_value rv;
320 struct fixed_value fv;
321 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
322 };
323
324 /* The size in bytes of an rtx header (code, mode and flags). */
325 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
326
327 /* The size in bytes of an rtx with code CODE. */
328 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
329
330 #define NULL_RTX (rtx) 0
331
332 /* The "next" and "previous" RTX, relative to this one. */
333
334 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
335 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
336
337 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
338 */
339 #define RTX_PREV(X) ((INSN_P (X) \
340 || NOTE_P (X) \
341 || BARRIER_P (X) \
342 || LABEL_P (X)) \
343 && PREV_INSN (X) != NULL \
344 && NEXT_INSN (PREV_INSN (X)) == X \
345 ? PREV_INSN (X) : NULL)
346
347 /* Define macros to access the `code' field of the rtx. */
348
349 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
350 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
351
352 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
353 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
354
355 /* RTL vector. These appear inside RTX's when there is a need
356 for a variable number of things. The principle use is inside
357 PARALLEL expressions. */
358
359 struct GTY(()) rtvec_def {
360 int num_elem; /* number of elements */
361 rtx GTY ((length ("%h.num_elem"))) elem[1];
362 };
363
364 #define NULL_RTVEC (rtvec) 0
365
366 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
367 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
368
369 /* Predicate yielding nonzero iff X is an rtx for a register. */
370 #define REG_P(X) (GET_CODE (X) == REG)
371
372 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
373 #define MEM_P(X) (GET_CODE (X) == MEM)
374
375 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
376 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
377
378 /* Predicate yielding nonzero iff X is a label insn. */
379 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
380
381 /* Predicate yielding nonzero iff X is a jump insn. */
382 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
383
384 /* Predicate yielding nonzero iff X is a call insn. */
385 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
386
387 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
388 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
389
390 /* Predicate yielding nonzero iff X is a debug note/insn. */
391 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
392
393 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
394 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
395
396 /* Nonzero if DEBUG_INSN_P may possibly hold. */
397 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
398
399 /* Predicate yielding nonzero iff X is a real insn. */
400 #define INSN_P(X) \
401 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
402
403 /* Predicate yielding nonzero iff X is a note insn. */
404 #define NOTE_P(X) (GET_CODE (X) == NOTE)
405
406 /* Predicate yielding nonzero iff X is a barrier insn. */
407 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
408
409 /* Predicate yielding nonzero iff X is a data for a jump table. */
410 #define JUMP_TABLE_DATA_P(INSN) \
411 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
412 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
413
414 /* 1 if X is a unary operator. */
415
416 #define UNARY_P(X) \
417 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
418
419 /* 1 if X is a binary operator. */
420
421 #define BINARY_P(X) \
422 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
423
424 /* 1 if X is an arithmetic operator. */
425
426 #define ARITHMETIC_P(X) \
427 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
428 == RTX_ARITHMETIC_RESULT)
429
430 /* 1 if X is an arithmetic operator. */
431
432 #define COMMUTATIVE_ARITH_P(X) \
433 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
434
435 /* 1 if X is a commutative arithmetic operator or a comparison operator.
436 These two are sometimes selected together because it is possible to
437 swap the two operands. */
438
439 #define SWAPPABLE_OPERANDS_P(X) \
440 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
441 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
442 | (1 << RTX_COMPARE)))
443
444 /* 1 if X is a non-commutative operator. */
445
446 #define NON_COMMUTATIVE_P(X) \
447 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
448 == RTX_NON_COMMUTATIVE_RESULT)
449
450 /* 1 if X is a commutative operator on integers. */
451
452 #define COMMUTATIVE_P(X) \
453 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
454 == RTX_COMMUTATIVE_RESULT)
455
456 /* 1 if X is a relational operator. */
457
458 #define COMPARISON_P(X) \
459 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
460
461 /* 1 if X is a constant value that is an integer. */
462
463 #define CONSTANT_P(X) \
464 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
465
466 /* 1 if X can be used to represent an object. */
467 #define OBJECT_P(X) \
468 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
469
470 /* General accessor macros for accessing the fields of an rtx. */
471
472 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
473 /* The bit with a star outside the statement expr and an & inside is
474 so that N can be evaluated only once. */
475 #define RTL_CHECK1(RTX, N, C1) __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 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
483 __FUNCTION__); \
484 &_rtx->u.fld[_n]; }))
485
486 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
487 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
488 const enum rtx_code _code = GET_CODE (_rtx); \
489 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
490 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
491 __FUNCTION__); \
492 if (GET_RTX_FORMAT(_code)[_n] != C1 \
493 && GET_RTX_FORMAT(_code)[_n] != C2) \
494 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
495 __FUNCTION__); \
496 &_rtx->u.fld[_n]; }))
497
498 #define RTL_CHECKC1(RTX, N, C) __extension__ \
499 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
500 if (GET_CODE (_rtx) != (C)) \
501 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
502 __FUNCTION__); \
503 &_rtx->u.fld[_n]; }))
504
505 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
506 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
507 const enum rtx_code _code = GET_CODE (_rtx); \
508 if (_code != (C1) && _code != (C2)) \
509 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
510 __FUNCTION__); \
511 &_rtx->u.fld[_n]; }))
512
513 #define RTVEC_ELT(RTVEC, I) __extension__ \
514 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
515 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
516 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
517 __FUNCTION__); \
518 &_rtvec->elem[_i]; }))
519
520 #define XWINT(RTX, N) __extension__ \
521 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
522 const enum rtx_code _code = GET_CODE (_rtx); \
523 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
524 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
525 __FUNCTION__); \
526 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
527 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
528 __FUNCTION__); \
529 &_rtx->u.hwint[_n]; }))
530
531 #define XCWINT(RTX, N, C) __extension__ \
532 (*({ __typeof (RTX) const _rtx = (RTX); \
533 if (GET_CODE (_rtx) != (C)) \
534 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
535 __FUNCTION__); \
536 &_rtx->u.hwint[N]; }))
537
538 #define XCMWINT(RTX, N, C, M) __extension__ \
539 (*({ __typeof (RTX) const _rtx = (RTX); \
540 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
541 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
542 __LINE__, __FUNCTION__); \
543 &_rtx->u.hwint[N]; }))
544
545 #define XCNMPRV(RTX, C, M) __extension__ \
546 ({ __typeof (RTX) const _rtx = (RTX); \
547 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
548 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
549 __LINE__, __FUNCTION__); \
550 &_rtx->u.rv; })
551
552 #define XCNMPFV(RTX, C, M) __extension__ \
553 ({ __typeof (RTX) const _rtx = (RTX); \
554 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
555 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
556 __LINE__, __FUNCTION__); \
557 &_rtx->u.fv; })
558
559 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
560 ({ __typeof (RTX) const _symbol = (RTX); \
561 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
562 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
563 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
564 __FUNCTION__); \
565 &_symbol->u.block_sym; })
566
567 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
568 const char *)
569 ATTRIBUTE_NORETURN;
570 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
571 const char *)
572 ATTRIBUTE_NORETURN;
573 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
574 int, const char *)
575 ATTRIBUTE_NORETURN;
576 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
577 int, const char *)
578 ATTRIBUTE_NORETURN;
579 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
580 const char *, int, const char *)
581 ATTRIBUTE_NORETURN;
582 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
583 bool, const char *, int, const char *)
584 ATTRIBUTE_NORETURN;
585 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
586 ATTRIBUTE_NORETURN;
587 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
588 const char *)
589 ATTRIBUTE_NORETURN;
590
591 #else /* not ENABLE_RTL_CHECKING */
592
593 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
594 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
595 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
596 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
597 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
598 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
599 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
600 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
601 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
602 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
603 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
604 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
605
606 #endif
607
608 /* General accessor macros for accessing the flags of an rtx. */
609
610 /* Access an individual rtx flag, with no checking of any kind. */
611 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
612
613 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
614 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
615 ({ __typeof (RTX) const _rtx = (RTX); \
616 if (GET_CODE(_rtx) != C1) \
617 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
618 __FUNCTION__); \
619 _rtx; })
620
621 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
622 ({ __typeof (RTX) const _rtx = (RTX); \
623 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
624 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
625 __FUNCTION__); \
626 _rtx; })
627
628 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
629 ({ __typeof (RTX) const _rtx = (RTX); \
630 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
631 && GET_CODE(_rtx) != C3) \
632 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
633 __FUNCTION__); \
634 _rtx; })
635
636 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
637 ({ __typeof (RTX) const _rtx = (RTX); \
638 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
639 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
640 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
641 __FUNCTION__); \
642 _rtx; })
643
644 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
645 ({ __typeof (RTX) const _rtx = (RTX); \
646 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
647 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
648 && GET_CODE(_rtx) != C5) \
649 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
650 __FUNCTION__); \
651 _rtx; })
652
653 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
654 __extension__ \
655 ({ __typeof (RTX) const _rtx = (RTX); \
656 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
657 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
658 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
659 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
660 __FUNCTION__); \
661 _rtx; })
662
663 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
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) \
670 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
671 __FUNCTION__); \
672 _rtx; })
673
674 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
675 __extension__ \
676 ({ __typeof (RTX) const _rtx = (RTX); \
677 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
678 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
679 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
680 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
681 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
682 __FUNCTION__); \
683 _rtx; })
684
685 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
686 int, const char *)
687 ATTRIBUTE_NORETURN
688 ;
689
690 #else /* not ENABLE_RTL_FLAG_CHECKING */
691
692 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
693 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
694 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
695 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
696 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
697 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
698 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
699 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
700 #endif
701
702 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
703 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
704 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
705 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
706 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
707 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
708 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
709 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
710 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
711
712 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
713 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
714
715 /* These are like XINT, etc. except that they expect a '0' field instead
716 of the normal type code. */
717
718 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
719 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
720 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
721 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
722 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
723 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
724 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
725 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
726 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
727 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
728 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
729 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
730 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
731 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
732
733 /* Access a '0' field with any type. */
734 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
735
736 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
737 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
738 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
739 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
740 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
741 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
742 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
743 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
744 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
745 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
746
747 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
748 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
749
750 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
751 \f
752 /* ACCESS MACROS for particular fields of insns. */
753
754 /* Holds a unique number for each insn.
755 These are not necessarily sequentially increasing. */
756 #define INSN_UID(INSN) XINT (INSN, 0)
757
758 /* Chain insns together in sequence. */
759 #define PREV_INSN(INSN) XEXP (INSN, 1)
760 #define NEXT_INSN(INSN) XEXP (INSN, 2)
761
762 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
763 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
764 /* LOCATION of an RTX if relevant. */
765 #define RTL_LOCATION(X) (INSN_P (X) ? \
766 locator_location (INSN_LOCATOR (X)) \
767 : UNKNOWN_LOCATION)
768 /* LOCATION of current INSN. */
769 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
770 /* The body of an insn. */
771 #define PATTERN(INSN) XEXP (INSN, 5)
772
773 /* Code number of instruction, from when it was recognized.
774 -1 means this instruction has not been recognized yet. */
775 #define INSN_CODE(INSN) XINT (INSN, 6)
776
777 #define RTX_FRAME_RELATED_P(RTX) \
778 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
779 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
780
781 /* 1 if RTX is an insn that has been deleted. */
782 #define INSN_DELETED_P(RTX) \
783 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
784 CALL_INSN, JUMP_INSN, \
785 CODE_LABEL, BARRIER, NOTE)->volatil)
786
787 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
788 TREE_READONLY. */
789 #define RTL_CONST_CALL_P(RTX) \
790 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
791
792 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
793 DECL_PURE_P. */
794 #define RTL_PURE_CALL_P(RTX) \
795 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
796
797 /* 1 if RTX is a call to a const or pure function. */
798 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
799 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
800
801 /* 1 if RTX is a call to a looping const or pure function. Built from
802 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
803 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
804 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
805
806 /* 1 if RTX is a call_insn for a sibling call. */
807 #define SIBLING_CALL_P(RTX) \
808 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
809
810 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
811 #define INSN_ANNULLED_BRANCH_P(RTX) \
812 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
813
814 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
815 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
816 executed if the branch is taken. For annulled branches with this bit
817 clear, the insn should be executed only if the branch is not taken. */
818 #define INSN_FROM_TARGET_P(RTX) \
819 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
820
821 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
822 See the comments for ADDR_DIFF_VEC in rtl.def. */
823 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
824
825 /* In a VALUE, the value cselib has assigned to RTX.
826 This is a "struct cselib_val_struct", see cselib.h. */
827 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
828
829 /* Holds a list of notes on what this insn does to various REGs.
830 It is a chain of EXPR_LIST rtx's, where the second operand is the
831 chain pointer and the first operand is the REG being described.
832 The mode field of the EXPR_LIST contains not a real machine mode
833 but a value from enum reg_note. */
834 #define REG_NOTES(INSN) XEXP(INSN, 7)
835
836 enum reg_note
837 {
838 #define DEF_REG_NOTE(NAME) NAME,
839 #include "reg-notes.def"
840 #undef DEF_REG_NOTE
841 REG_NOTE_MAX
842 };
843
844 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
845 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
846 #define PUT_REG_NOTE_KIND(LINK, KIND) \
847 PUT_MODE (LINK, (enum machine_mode) (KIND))
848
849 /* Names for REG_NOTE's in EXPR_LIST insn's. */
850
851 extern const char * const reg_note_name[];
852 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
853
854 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
855 USE and CLOBBER expressions.
856 USE expressions list the registers filled with arguments that
857 are passed to the function.
858 CLOBBER expressions document the registers explicitly clobbered
859 by this CALL_INSN.
860 Pseudo registers can not be mentioned in this list. */
861 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
862
863 /* The label-number of a code-label. The assembler label
864 is made from `L' and the label-number printed in decimal.
865 Label numbers are unique in a compilation. */
866 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
867
868 /* In a NOTE that is a line number, this is a string for the file name that the
869 line is in. We use the same field to record block numbers temporarily in
870 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
871 between ints and pointers if we use a different macro for the block number.)
872 */
873
874 /* Opaque data. */
875 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
876 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
877 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
878 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
879 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
880 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
881 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
882
883 /* In a NOTE that is a line number, this is the line number.
884 Other kinds of NOTEs are identified by negative numbers here. */
885 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
886
887 /* Nonzero if INSN is a note marking the beginning of a basic block. */
888 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
889 (GET_CODE (INSN) == NOTE \
890 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
891
892 /* Variable declaration and the location of a variable. */
893 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
894 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
895
896 /* Initialization status of the variable in the location. Status
897 can be unknown, uninitialized or initialized. See enumeration
898 type below. */
899 #define PAT_VAR_LOCATION_STATUS(PAT) \
900 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
901
902 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
903 #define NOTE_VAR_LOCATION_DECL(NOTE) \
904 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
905 #define NOTE_VAR_LOCATION_LOC(NOTE) \
906 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
907 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
908 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
909
910 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
911 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
912
913 /* Accessors for a tree-expanded var location debug insn. */
914 #define INSN_VAR_LOCATION_DECL(INSN) \
915 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
916 #define INSN_VAR_LOCATION_LOC(INSN) \
917 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
918 #define INSN_VAR_LOCATION_STATUS(INSN) \
919 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
920
921 /* Expand to the RTL that denotes an unknown variable location in a
922 DEBUG_INSN. */
923 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
924
925 /* Determine whether X is such an unknown location. */
926 #define VAR_LOC_UNKNOWN_P(X) \
927 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
928
929 /* 1 if RTX is emitted after a call, but it should take effect before
930 the call returns. */
931 #define NOTE_DURING_CALL_P(RTX) \
932 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
933
934 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
935 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
936
937 /* Possible initialization status of a variable. When requested
938 by the user, this information is tracked and recorded in the DWARF
939 debug information, along with the variable's location. */
940 enum var_init_status
941 {
942 VAR_INIT_STATUS_UNKNOWN,
943 VAR_INIT_STATUS_UNINITIALIZED,
944 VAR_INIT_STATUS_INITIALIZED
945 };
946
947 /* Codes that appear in the NOTE_KIND field for kinds of notes
948 that are not line numbers. These codes are all negative.
949
950 Notice that we do not try to use zero here for any of
951 the special note codes because sometimes the source line
952 actually can be zero! This happens (for example) when we
953 are generating code for the per-translation-unit constructor
954 and destructor routines for some C++ translation unit. */
955
956 enum insn_note
957 {
958 #define DEF_INSN_NOTE(NAME) NAME,
959 #include "insn-notes.def"
960 #undef DEF_INSN_NOTE
961
962 NOTE_INSN_MAX
963 };
964
965 /* Names for NOTE insn's other than line numbers. */
966
967 extern const char * const note_insn_name[NOTE_INSN_MAX];
968 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
969 (note_insn_name[(NOTE_CODE)])
970
971 /* The name of a label, in case it corresponds to an explicit label
972 in the input source code. */
973 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
974
975 /* In jump.c, each label contains a count of the number
976 of LABEL_REFs that point at it, so unused labels can be deleted. */
977 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
978
979 /* Labels carry a two-bit field composed of the ->jump and ->call
980 bits. This field indicates whether the label is an alternate
981 entry point, and if so, what kind. */
982 enum label_kind
983 {
984 LABEL_NORMAL = 0, /* ordinary label */
985 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
986 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
987 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
988 };
989
990 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
991
992 /* Retrieve the kind of LABEL. */
993 #define LABEL_KIND(LABEL) __extension__ \
994 ({ __typeof (LABEL) const _label = (LABEL); \
995 if (GET_CODE (_label) != CODE_LABEL) \
996 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
997 __FUNCTION__); \
998 (enum label_kind) ((_label->jump << 1) | _label->call); })
999
1000 /* Set the kind of LABEL. */
1001 #define SET_LABEL_KIND(LABEL, KIND) do { \
1002 __typeof (LABEL) const _label = (LABEL); \
1003 const unsigned int _kind = (KIND); \
1004 if (GET_CODE (_label) != CODE_LABEL) \
1005 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1006 __FUNCTION__); \
1007 _label->jump = ((_kind >> 1) & 1); \
1008 _label->call = (_kind & 1); \
1009 } while (0)
1010
1011 #else
1012
1013 /* Retrieve the kind of LABEL. */
1014 #define LABEL_KIND(LABEL) \
1015 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1016
1017 /* Set the kind of LABEL. */
1018 #define SET_LABEL_KIND(LABEL, KIND) do { \
1019 rtx const _label = (LABEL); \
1020 const unsigned int _kind = (KIND); \
1021 _label->jump = ((_kind >> 1) & 1); \
1022 _label->call = (_kind & 1); \
1023 } while (0)
1024
1025 #endif /* rtl flag checking */
1026
1027 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1028
1029 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1030 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1031 be decremented and possibly the label can be deleted. */
1032 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1033
1034 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1035 goes through all the LABEL_REFs that jump to that label. The chain
1036 eventually winds up at the CODE_LABEL: it is circular. */
1037 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1038 \f
1039 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1040 be used on RHS. Use SET_REGNO to change the value. */
1041 #define REGNO(RTX) (rhs_regno(RTX))
1042 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1043
1044 /* ORIGINAL_REGNO holds the number the register originally had; for a
1045 pseudo register turned into a hard reg this will hold the old pseudo
1046 register number. */
1047 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1048
1049 /* Force the REGNO macro to only be used on the lhs. */
1050 static inline unsigned int
1051 rhs_regno (const_rtx x)
1052 {
1053 return XCUINT (x, 0, REG);
1054 }
1055
1056
1057
1058 /* 1 if RTX is a reg or parallel that is the current function's return
1059 value. */
1060 #define REG_FUNCTION_VALUE_P(RTX) \
1061 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1062
1063 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1064 #define REG_USERVAR_P(RTX) \
1065 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1066
1067 /* 1 if RTX is a reg that holds a pointer value. */
1068 #define REG_POINTER(RTX) \
1069 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1070
1071 /* 1 if RTX is a mem that holds a pointer value. */
1072 #define MEM_POINTER(RTX) \
1073 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1074
1075 /* 1 if the given register REG corresponds to a hard register. */
1076 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1077
1078 /* 1 if the given register number REG_NO corresponds to a hard register. */
1079 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1080
1081 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1082 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1083 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1084
1085 /* For a CONST_DOUBLE:
1086 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1087 low-order word and ..._HIGH the high-order.
1088 For a float, there is a REAL_VALUE_TYPE structure, and
1089 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1090 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1091 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1092 #define CONST_DOUBLE_REAL_VALUE(r) \
1093 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1094
1095 #define CONST_FIXED_VALUE(r) \
1096 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1097 #define CONST_FIXED_VALUE_HIGH(r) \
1098 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1099 #define CONST_FIXED_VALUE_LOW(r) \
1100 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1101
1102 /* For a CONST_VECTOR, return element #n. */
1103 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1104
1105 /* For a CONST_VECTOR, return the number of elements in a vector. */
1106 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1107
1108 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1109 SUBREG_BYTE extracts the byte-number. */
1110
1111 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1112 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1113
1114 /* in rtlanal.c */
1115 /* Return the right cost to give to an operation
1116 to make the cost of the corresponding register-to-register instruction
1117 N times that of a fast register-to-register instruction. */
1118 #define COSTS_N_INSNS(N) ((N) * 4)
1119
1120 /* Maximum cost of an rtl expression. This value has the special meaning
1121 not to use an rtx with this cost under any circumstances. */
1122 #define MAX_COST INT_MAX
1123
1124 extern void init_rtlanal (void);
1125 extern int rtx_cost (rtx, enum rtx_code, bool);
1126 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1127 extern unsigned int subreg_lsb (const_rtx);
1128 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1129 unsigned int);
1130 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1131 unsigned int, enum machine_mode);
1132 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1133 unsigned int, enum machine_mode);
1134 extern unsigned int subreg_regno (const_rtx);
1135 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1136 unsigned int, enum machine_mode);
1137 extern unsigned int subreg_nregs (const_rtx);
1138 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1139 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1140 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1141 extern bool constant_pool_constant_p (rtx);
1142 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1143 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1144
1145
1146 /* 1 if RTX is a subreg containing a reg that is already known to be
1147 sign- or zero-extended from the mode of the subreg to the mode of
1148 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1149 extension.
1150
1151 When used as a LHS, is means that this extension must be done
1152 when assigning to SUBREG_REG. */
1153
1154 #define SUBREG_PROMOTED_VAR_P(RTX) \
1155 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1156
1157 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1158 do { \
1159 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1160 if ((VAL) < 0) \
1161 _rtx->volatil = 1; \
1162 else { \
1163 _rtx->volatil = 0; \
1164 _rtx->unchanging = (VAL); \
1165 } \
1166 } while (0)
1167
1168 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1169 this gives the necessary extensions:
1170 0 - signed
1171 1 - normal unsigned
1172 -1 - pointer unsigned, which most often can be handled like unsigned
1173 extension, except for generating instructions where we need to
1174 emit special code (ptr_extend insns) on some architectures. */
1175
1176 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1177 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1178 ? -1 : (int) (RTX)->unchanging)
1179
1180 /* Access various components of an ASM_OPERANDS rtx. */
1181
1182 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1183 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1184 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1185 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1186 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1187 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1188 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1189 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1190 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1191 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1192 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1193 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1194 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1195 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1196 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1197 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1198 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1199 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1200
1201 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1202 #define MEM_READONLY_P(RTX) \
1203 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1204
1205 /* 1 if RTX is a mem and we should keep the alias set for this mem
1206 unchanged when we access a component. Set to 1, or example, when we
1207 are already in a non-addressable component of an aggregate. */
1208 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1209 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1210
1211 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1212 #define MEM_VOLATILE_P(RTX) \
1213 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1214 ASM_INPUT)->volatil)
1215
1216 /* 1 if RTX is a mem that refers to an aggregate, either to the
1217 aggregate itself or to a field of the aggregate. If zero, RTX may
1218 or may not be such a reference. */
1219 #define MEM_IN_STRUCT_P(RTX) \
1220 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1221
1222 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1223 not refer to a scalar. */
1224 #define MEM_SCALAR_P(RTX) \
1225 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1226
1227 /* 1 if RTX is a mem that cannot trap. */
1228 #define MEM_NOTRAP_P(RTX) \
1229 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1230
1231 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1232 RTX. Otherwise, vice versa. Use this macro only when you are
1233 *sure* that you know that the MEM is in a structure, or is a
1234 scalar. VAL is evaluated only once. */
1235 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1236 do { \
1237 if (VAL) \
1238 { \
1239 MEM_IN_STRUCT_P (RTX) = 1; \
1240 MEM_SCALAR_P (RTX) = 0; \
1241 } \
1242 else \
1243 { \
1244 MEM_IN_STRUCT_P (RTX) = 0; \
1245 MEM_SCALAR_P (RTX) = 1; \
1246 } \
1247 } while (0)
1248
1249 /* The memory attribute block. We provide access macros for each value
1250 in the block and provide defaults if none specified. */
1251 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1252
1253 /* The register attribute block. We provide access macros for each value
1254 in the block and provide defaults if none specified. */
1255 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1256
1257 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1258 set, and may alias anything. Otherwise, the MEM can only alias
1259 MEMs in a conflicting alias set. This value is set in a
1260 language-dependent manner in the front-end, and should not be
1261 altered in the back-end. These set numbers are tested with
1262 alias_sets_conflict_p. */
1263 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1264
1265 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1266 refer to part of a DECL. It may also be a COMPONENT_REF. */
1267 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1268
1269 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1270 RTX that is always a CONST_INT. */
1271 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1272
1273 /* For a MEM rtx, the address space. */
1274 #define MEM_ADDR_SPACE(RTX) (MEM_ATTRS (RTX) == 0 ? ADDR_SPACE_GENERIC \
1275 : MEM_ATTRS (RTX)->addrspace)
1276
1277 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1278 is always a CONST_INT. */
1279 #define MEM_SIZE(RTX) \
1280 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1281 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1282 : 0)
1283
1284 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1285 mode as a default when STRICT_ALIGNMENT, but not if not. */
1286 #define MEM_ALIGN(RTX) \
1287 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1288 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1289 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1290
1291 /* For a REG rtx, the decl it is known to refer to, if it is known to
1292 refer to part of a DECL. */
1293 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1294
1295 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1296 HOST_WIDE_INT. */
1297 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1298
1299 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1300 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1301 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1302 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1303 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1304 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1305 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1306 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1307 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1308 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1309
1310 /* 1 if RTX is a label_ref for a nonlocal label. */
1311 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1312 REG_LABEL_TARGET note. */
1313 #define LABEL_REF_NONLOCAL_P(RTX) \
1314 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1315
1316 /* 1 if RTX is a code_label that should always be considered to be needed. */
1317 #define LABEL_PRESERVE_P(RTX) \
1318 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1319
1320 /* During sched, 1 if RTX is an insn that must be scheduled together
1321 with the preceding insn. */
1322 #define SCHED_GROUP_P(RTX) \
1323 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1324 JUMP_INSN, CALL_INSN \
1325 )->in_struct)
1326
1327 /* For a SET rtx, SET_DEST is the place that is set
1328 and SET_SRC is the value it is set to. */
1329 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1330 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1331 #define SET_IS_RETURN_P(RTX) \
1332 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1333
1334 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1335 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1336 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1337
1338 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1339 conditionally executing the code on, COND_EXEC_CODE is the code
1340 to execute if the condition is true. */
1341 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1342 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1343
1344 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1345 constants pool. */
1346 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1347 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1348
1349 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1350 tree constant pool. This information is private to varasm.c. */
1351 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1352 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1353 (RTX), SYMBOL_REF)->frame_related)
1354
1355 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1356 #define SYMBOL_REF_FLAG(RTX) \
1357 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1358
1359 /* 1 if RTX is a symbol_ref that has been the library function in
1360 emit_library_call. */
1361 #define SYMBOL_REF_USED(RTX) \
1362 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1363
1364 /* 1 if RTX is a symbol_ref for a weak symbol. */
1365 #define SYMBOL_REF_WEAK(RTX) \
1366 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1367
1368 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1369 SYMBOL_REF_CONSTANT. */
1370 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1371
1372 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1373 pool symbol. */
1374 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1375 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1376
1377 /* The tree (decl or constant) associated with the symbol, or null. */
1378 #define SYMBOL_REF_DECL(RTX) \
1379 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1380
1381 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1382 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1383 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1384
1385 /* The rtx constant pool entry for a symbol, or null. */
1386 #define SYMBOL_REF_CONSTANT(RTX) \
1387 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1388
1389 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1390 information derivable from the tree decl associated with this symbol.
1391 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1392 decl. In some cases this is a bug. But beyond that, it's nice to cache
1393 this information to avoid recomputing it. Finally, this allows space for
1394 the target to store more than one bit of information, as with
1395 SYMBOL_REF_FLAG. */
1396 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1397
1398 /* These flags are common enough to be defined for all targets. They
1399 are computed by the default version of targetm.encode_section_info. */
1400
1401 /* Set if this symbol is a function. */
1402 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1403 #define SYMBOL_REF_FUNCTION_P(RTX) \
1404 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1405 /* Set if targetm.binds_local_p is true. */
1406 #define SYMBOL_FLAG_LOCAL (1 << 1)
1407 #define SYMBOL_REF_LOCAL_P(RTX) \
1408 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1409 /* Set if targetm.in_small_data_p is true. */
1410 #define SYMBOL_FLAG_SMALL (1 << 2)
1411 #define SYMBOL_REF_SMALL_P(RTX) \
1412 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1413 /* The three-bit field at [5:3] is true for TLS variables; use
1414 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1415 #define SYMBOL_FLAG_TLS_SHIFT 3
1416 #define SYMBOL_REF_TLS_MODEL(RTX) \
1417 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1418 /* Set if this symbol is not defined in this translation unit. */
1419 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1420 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1421 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1422 /* Set if this symbol has a block_symbol structure associated with it. */
1423 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1424 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1425 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1426 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1427 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1428 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1429 #define SYMBOL_REF_ANCHOR_P(RTX) \
1430 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1431
1432 /* Subsequent bits are available for the target to use. */
1433 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1434 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1435
1436 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1437 structure to which the symbol belongs, or NULL if it has not been
1438 assigned a block. */
1439 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1440
1441 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1442 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1443 RTX has not yet been assigned to a block, or it has not been given an
1444 offset within that block. */
1445 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1446
1447 /* True if RTX is flagged to be a scheduling barrier. */
1448 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1449 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1450
1451 /* Indicate whether the machine has any sort of auto increment addressing.
1452 If not, we can avoid checking for REG_INC notes. */
1453
1454 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1455 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1456 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1457 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1458 #define AUTO_INC_DEC
1459 #endif
1460
1461 /* Define a macro to look for REG_INC notes,
1462 but save time on machines where they never exist. */
1463
1464 #ifdef AUTO_INC_DEC
1465 #define FIND_REG_INC_NOTE(INSN, REG) \
1466 ((REG) != NULL_RTX && REG_P ((REG)) \
1467 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1468 : find_reg_note ((INSN), REG_INC, (REG)))
1469 #else
1470 #define FIND_REG_INC_NOTE(INSN, REG) 0
1471 #endif
1472
1473 #ifndef HAVE_PRE_INCREMENT
1474 #define HAVE_PRE_INCREMENT 0
1475 #endif
1476
1477 #ifndef HAVE_PRE_DECREMENT
1478 #define HAVE_PRE_DECREMENT 0
1479 #endif
1480
1481 #ifndef HAVE_POST_INCREMENT
1482 #define HAVE_POST_INCREMENT 0
1483 #endif
1484
1485 #ifndef HAVE_POST_DECREMENT
1486 #define HAVE_POST_DECREMENT 0
1487 #endif
1488
1489 #ifndef HAVE_POST_MODIFY_DISP
1490 #define HAVE_POST_MODIFY_DISP 0
1491 #endif
1492
1493 #ifndef HAVE_POST_MODIFY_REG
1494 #define HAVE_POST_MODIFY_REG 0
1495 #endif
1496
1497 #ifndef HAVE_PRE_MODIFY_DISP
1498 #define HAVE_PRE_MODIFY_DISP 0
1499 #endif
1500
1501 #ifndef HAVE_PRE_MODIFY_REG
1502 #define HAVE_PRE_MODIFY_REG 0
1503 #endif
1504
1505
1506 /* Some architectures do not have complete pre/post increment/decrement
1507 instruction sets, or only move some modes efficiently. These macros
1508 allow us to tune autoincrement generation. */
1509
1510 #ifndef USE_LOAD_POST_INCREMENT
1511 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1512 #endif
1513
1514 #ifndef USE_LOAD_POST_DECREMENT
1515 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1516 #endif
1517
1518 #ifndef USE_LOAD_PRE_INCREMENT
1519 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1520 #endif
1521
1522 #ifndef USE_LOAD_PRE_DECREMENT
1523 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1524 #endif
1525
1526 #ifndef USE_STORE_POST_INCREMENT
1527 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1528 #endif
1529
1530 #ifndef USE_STORE_POST_DECREMENT
1531 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1532 #endif
1533
1534 #ifndef USE_STORE_PRE_INCREMENT
1535 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1536 #endif
1537
1538 #ifndef USE_STORE_PRE_DECREMENT
1539 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1540 #endif
1541 \f
1542 /* Nonzero when we are generating CONCATs. */
1543 extern int generating_concat_p;
1544
1545 /* Nonzero when we are expanding trees to RTL. */
1546 extern int currently_expanding_to_rtl;
1547
1548 /* Generally useful functions. */
1549
1550 /* In expmed.c */
1551 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1552
1553 /* In explow.c */
1554 extern void set_stack_check_libfunc (rtx);
1555 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1556 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1557
1558 /* In emit-rtl.c */
1559 extern rtx gen_blockage (void);
1560 extern rtvec gen_rtvec (int, ...);
1561 extern rtx copy_insn_1 (rtx);
1562 extern rtx copy_insn (rtx);
1563 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1564 extern rtx emit_copy_of_insn_after (rtx, rtx);
1565 extern void set_reg_attrs_from_value (rtx, rtx);
1566 extern void set_reg_attrs_for_parm (rtx, rtx);
1567 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1568 extern void adjust_reg_mode (rtx, enum machine_mode);
1569 extern int mem_expr_equal_p (const_tree, const_tree);
1570
1571 /* In rtl.c */
1572 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1573 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1574
1575 extern rtvec rtvec_alloc (int);
1576 extern rtvec shallow_copy_rtvec (rtvec);
1577 extern bool shared_const_p (const_rtx);
1578 extern rtx copy_rtx (rtx);
1579 extern void dump_rtx_statistics (void);
1580
1581 /* In emit-rtl.c */
1582 extern rtx copy_rtx_if_shared (rtx);
1583
1584 /* In rtl.c */
1585 extern unsigned int rtx_size (const_rtx);
1586 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1587 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1588 extern int rtx_equal_p (const_rtx, const_rtx);
1589
1590 /* In emit-rtl.c */
1591 extern rtvec gen_rtvec_v (int, rtx *);
1592 extern rtx gen_reg_rtx (enum machine_mode);
1593 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1594 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1595 extern rtx gen_reg_rtx_and_attrs (rtx);
1596 extern rtx gen_label_rtx (void);
1597 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1598
1599 /* In cse.c */
1600 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1601
1602 /* In emit-rtl.c */
1603 extern rtx gen_highpart (enum machine_mode, rtx);
1604 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1605 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1606
1607 /* In emit-rtl.c */
1608 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1609 extern int subreg_lowpart_p (const_rtx);
1610 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1611 enum machine_mode);
1612 extern unsigned int subreg_highpart_offset (enum machine_mode,
1613 enum machine_mode);
1614 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1615 extern rtx make_safe_from (rtx, rtx);
1616 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1617 addr_space_t);
1618 #define convert_memory_address(to_mode,x) \
1619 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1620 extern rtx get_insns (void);
1621 extern const char *get_insn_name (int);
1622 extern rtx get_last_insn (void);
1623 extern rtx get_last_insn_anywhere (void);
1624 extern rtx get_first_nonnote_insn (void);
1625 extern rtx get_last_nonnote_insn (void);
1626 extern void start_sequence (void);
1627 extern void push_to_sequence (rtx);
1628 extern void push_to_sequence2 (rtx, rtx);
1629 extern void end_sequence (void);
1630 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1631 enum machine_mode);
1632
1633 /* In loop-iv.c */
1634
1635 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1636
1637 /* In varasm.c */
1638 extern rtx force_const_mem (enum machine_mode, rtx);
1639
1640 /* In varasm.c */
1641
1642 struct function;
1643 extern rtx get_pool_constant (rtx);
1644 extern rtx get_pool_constant_mark (rtx, bool *);
1645 extern enum machine_mode get_pool_mode (const_rtx);
1646 extern rtx simplify_subtraction (rtx);
1647
1648 /* In function.c */
1649 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1650 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1651 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1652 extern rtx assign_stack_temp_for_type (enum machine_mode,
1653 HOST_WIDE_INT, int, tree);
1654 extern rtx assign_temp (tree, int, int, int);
1655
1656 /* In emit-rtl.c */
1657 extern rtx emit_insn_before (rtx, rtx);
1658 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1659 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1660 extern rtx emit_jump_insn_before (rtx, rtx);
1661 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1662 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1663 extern rtx emit_call_insn_before (rtx, rtx);
1664 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1665 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1666 extern rtx emit_debug_insn_before (rtx, rtx);
1667 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1668 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1669 extern rtx emit_barrier_before (rtx);
1670 extern rtx emit_label_before (rtx, rtx);
1671 extern rtx emit_note_before (enum insn_note, rtx);
1672 extern rtx emit_insn_after (rtx, rtx);
1673 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1674 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1675 extern rtx emit_jump_insn_after (rtx, rtx);
1676 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1677 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1678 extern rtx emit_call_insn_after (rtx, rtx);
1679 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1680 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1681 extern rtx emit_debug_insn_after (rtx, rtx);
1682 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1683 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1684 extern rtx emit_barrier_after (rtx);
1685 extern rtx emit_label_after (rtx, rtx);
1686 extern rtx emit_note_after (enum insn_note, rtx);
1687 extern rtx emit_insn (rtx);
1688 extern rtx emit_debug_insn (rtx);
1689 extern rtx emit_jump_insn (rtx);
1690 extern rtx emit_call_insn (rtx);
1691 extern rtx emit_label (rtx);
1692 extern rtx emit_barrier (void);
1693 extern rtx emit_note (enum insn_note);
1694 extern rtx emit_note_copy (rtx);
1695 extern rtx gen_clobber (rtx);
1696 extern rtx emit_clobber (rtx);
1697 extern rtx gen_use (rtx);
1698 extern rtx emit_use (rtx);
1699 extern rtx make_insn_raw (rtx);
1700 extern rtx make_debug_insn_raw (rtx);
1701 extern rtx make_jump_insn_raw (rtx);
1702 extern void add_function_usage_to (rtx, rtx);
1703 extern rtx last_call_insn (void);
1704 extern rtx previous_insn (rtx);
1705 extern rtx next_insn (rtx);
1706 extern rtx prev_nonnote_insn (rtx);
1707 extern rtx prev_nonnote_insn_bb (rtx);
1708 extern rtx next_nonnote_insn (rtx);
1709 extern rtx next_nonnote_insn_bb (rtx);
1710 extern rtx prev_nondebug_insn (rtx);
1711 extern rtx next_nondebug_insn (rtx);
1712 extern rtx prev_real_insn (rtx);
1713 extern rtx next_real_insn (rtx);
1714 extern rtx prev_active_insn (rtx);
1715 extern rtx next_active_insn (rtx);
1716 extern int active_insn_p (const_rtx);
1717 extern rtx prev_label (rtx);
1718 extern rtx next_label (rtx);
1719 extern rtx skip_consecutive_labels (rtx);
1720 extern rtx next_cc0_user (rtx);
1721 extern rtx prev_cc0_setter (rtx);
1722
1723 /* In cfglayout.c */
1724 extern int insn_line (const_rtx);
1725 extern const char * insn_file (const_rtx);
1726 extern location_t locator_location (int);
1727 extern int locator_line (int);
1728 extern const char * locator_file (int);
1729 extern bool locator_eq (int, int);
1730 extern int prologue_locator, epilogue_locator;
1731
1732 /* In jump.c */
1733 extern enum rtx_code reverse_condition (enum rtx_code);
1734 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1735 extern enum rtx_code swap_condition (enum rtx_code);
1736 extern enum rtx_code unsigned_condition (enum rtx_code);
1737 extern enum rtx_code signed_condition (enum rtx_code);
1738 extern void mark_jump_label (rtx, rtx, int);
1739 extern unsigned int cleanup_barriers (void);
1740
1741 /* In jump.c */
1742 extern rtx delete_related_insns (rtx);
1743
1744 /* In recog.c */
1745 extern rtx *find_constant_term_loc (rtx *);
1746
1747 /* In emit-rtl.c */
1748 extern rtx try_split (rtx, rtx, int);
1749 extern int split_branch_probability;
1750
1751 /* In unknown file */
1752 extern rtx split_insns (rtx, rtx);
1753
1754 /* In simplify-rtx.c */
1755 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1756 rtx, enum machine_mode);
1757 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1758 enum machine_mode);
1759 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1760 rtx, rtx);
1761 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1762 rtx);
1763 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1764 enum machine_mode, rtx, rtx, rtx);
1765 extern rtx simplify_const_relational_operation (enum rtx_code,
1766 enum machine_mode, rtx, rtx);
1767 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1768 enum machine_mode, rtx, rtx);
1769 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1770 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1771 enum machine_mode);
1772 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1773 enum machine_mode, rtx, rtx, rtx);
1774 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1775 enum machine_mode, rtx, rtx);
1776 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1777 unsigned int);
1778 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1779 unsigned int);
1780 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1781 rtx (*fn) (rtx, void *), void *);
1782 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1783 extern rtx simplify_rtx (const_rtx);
1784 extern rtx avoid_constant_pool_reference (rtx);
1785 extern rtx delegitimize_mem_from_attrs (rtx);
1786 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1787
1788 /* In reginfo.c */
1789 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1790 bool);
1791
1792 /* In emit-rtl.c */
1793 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1794 extern void set_insn_deleted (rtx);
1795
1796 /* Functions in rtlanal.c */
1797
1798 /* Single set is implemented as macro for performance reasons. */
1799 #define single_set(I) (INSN_P (I) \
1800 ? (GET_CODE (PATTERN (I)) == SET \
1801 ? PATTERN (I) : single_set_1 (I)) \
1802 : NULL_RTX)
1803 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1804
1805 /* Structure used for passing data to REPLACE_LABEL. */
1806 typedef struct replace_label_data
1807 {
1808 rtx r1;
1809 rtx r2;
1810 bool update_label_nuses;
1811 } replace_label_data;
1812
1813 extern int rtx_addr_can_trap_p (const_rtx);
1814 extern bool nonzero_address_p (const_rtx);
1815 extern int rtx_unstable_p (const_rtx);
1816 extern bool rtx_varies_p (const_rtx, bool);
1817 extern bool rtx_addr_varies_p (const_rtx, bool);
1818 extern HOST_WIDE_INT get_integer_term (const_rtx);
1819 extern rtx get_related_value (const_rtx);
1820 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1821 extern void split_const (rtx, rtx *, rtx *);
1822 extern int reg_mentioned_p (const_rtx, const_rtx);
1823 extern int count_occurrences (const_rtx, const_rtx, int);
1824 extern int reg_referenced_p (const_rtx, const_rtx);
1825 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1826 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1827 extern int commutative_operand_precedence (rtx);
1828 extern bool swap_commutative_operands_p (rtx, rtx);
1829 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1830 extern int no_labels_between_p (const_rtx, const_rtx);
1831 extern int modified_in_p (const_rtx, const_rtx);
1832 extern int reg_set_p (const_rtx, const_rtx);
1833 extern rtx single_set_2 (const_rtx, const_rtx);
1834 extern int multiple_sets (const_rtx);
1835 extern int set_noop_p (const_rtx);
1836 extern int noop_move_p (const_rtx);
1837 extern rtx find_last_value (rtx, rtx *, rtx, int);
1838 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1839 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1840 extern const_rtx set_of (const_rtx, const_rtx);
1841 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1842 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1843 extern int dead_or_set_p (const_rtx, const_rtx);
1844 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1845 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1846 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1847 extern rtx find_reg_equal_equiv_note (const_rtx);
1848 extern rtx find_constant_src (const_rtx);
1849 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1850 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1851 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1852 extern void add_reg_note (rtx, enum reg_note, rtx);
1853 extern void remove_note (rtx, const_rtx);
1854 extern void remove_reg_equal_equiv_notes (rtx);
1855 extern int side_effects_p (const_rtx);
1856 extern int volatile_refs_p (const_rtx);
1857 extern int volatile_insn_p (const_rtx);
1858 extern int may_trap_p_1 (const_rtx, unsigned);
1859 extern int may_trap_p (const_rtx);
1860 extern int may_trap_or_fault_p (const_rtx);
1861 extern bool can_throw_internal (const_rtx);
1862 extern bool can_throw_external (const_rtx);
1863 extern bool insn_could_throw_p (const_rtx);
1864 extern bool insn_nothrow_p (const_rtx);
1865 extern bool can_nonlocal_goto (const_rtx);
1866 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1867 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1868 extern int inequality_comparisons_p (const_rtx);
1869 extern rtx replace_rtx (rtx, rtx, rtx);
1870 extern int replace_label (rtx *, void *);
1871 extern int rtx_referenced_p (rtx, rtx);
1872 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1873 extern int computed_jump_p (const_rtx);
1874
1875 typedef int (*rtx_function) (rtx *, void *);
1876 extern int for_each_rtx (rtx *, rtx_function, void *);
1877
1878 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1879 rtx *, rtx *);
1880 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1881 rtx_equal_p_callback_function);
1882
1883 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1884 enum machine_mode *);
1885 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1886 bool, hash_rtx_callback_function);
1887
1888 extern rtx regno_use_in (unsigned int, rtx);
1889 extern int auto_inc_p (const_rtx);
1890 extern int in_expr_list_p (const_rtx, const_rtx);
1891 extern void remove_node_from_expr_list (const_rtx, rtx *);
1892 extern int loc_mentioned_in_p (rtx *, const_rtx);
1893 extern rtx find_first_parameter_load (rtx, rtx);
1894 extern bool keep_with_call_p (const_rtx);
1895 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1896 extern int insn_rtx_cost (rtx, bool);
1897
1898 /* Given an insn and condition, return a canonical description of
1899 the test being made. */
1900 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1901
1902 /* Given a JUMP_INSN, return a canonical description of the test
1903 being made. */
1904 extern rtx get_condition (rtx, rtx *, int, int);
1905
1906 /* Information about a subreg of a hard register. */
1907 struct subreg_info
1908 {
1909 /* Offset of first hard register involved in the subreg. */
1910 int offset;
1911 /* Number of hard registers involved in the subreg. */
1912 int nregs;
1913 /* Whether this subreg can be represented as a hard reg with the new
1914 mode. */
1915 bool representable_p;
1916 };
1917
1918 extern void subreg_get_info (unsigned int, enum machine_mode,
1919 unsigned int, enum machine_mode,
1920 struct subreg_info *);
1921
1922 /* lists.c */
1923
1924 extern void free_EXPR_LIST_list (rtx *);
1925 extern void free_INSN_LIST_list (rtx *);
1926 extern void free_EXPR_LIST_node (rtx);
1927 extern void free_INSN_LIST_node (rtx);
1928 extern rtx alloc_INSN_LIST (rtx, rtx);
1929 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1930 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1931 extern rtx remove_list_elem (rtx, rtx *);
1932 extern rtx remove_free_INSN_LIST_node (rtx *);
1933 extern rtx remove_free_EXPR_LIST_node (rtx *);
1934
1935
1936 /* reginfo.c */
1937
1938 /* Initialize may_move_cost and friends for mode M. */
1939 extern void init_move_cost (enum machine_mode);
1940 /* Resize reg info. */
1941 extern bool resize_reg_info (void);
1942 /* Free up register info memory. */
1943 extern void free_reg_info (void);
1944 extern void init_subregs_of_mode (void);
1945 extern void finish_subregs_of_mode (void);
1946
1947 /* recog.c */
1948 extern rtx extract_asm_operands (rtx);
1949 extern int asm_noperands (const_rtx);
1950 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1951 enum machine_mode *, location_t *);
1952
1953 extern enum reg_class reg_preferred_class (int);
1954 extern enum reg_class reg_alternate_class (int);
1955 extern enum reg_class reg_cover_class (int);
1956 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1957 enum reg_class);
1958
1959 extern void split_all_insns (void);
1960 extern unsigned int split_all_insns_noflow (void);
1961
1962 #define MAX_SAVED_CONST_INT 64
1963 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1964
1965 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1966 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1967 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1968 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1969 extern GTY(()) rtx const_true_rtx;
1970
1971 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1972
1973 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1974 same as VOIDmode. */
1975
1976 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1977
1978 /* Likewise, for the constants 1 and 2. */
1979
1980 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1981 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1982
1983 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1984 is used to represent the frame pointer. This is because the
1985 hard frame pointer and the automatic variables are separated by an amount
1986 that cannot be determined until after register allocation. We can assume
1987 that in this case ELIMINABLE_REGS will be defined, one action of which
1988 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1989 #ifndef HARD_FRAME_POINTER_REGNUM
1990 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1991 #endif
1992
1993 /* Index labels for global_rtl. */
1994 enum global_rtl_index
1995 {
1996 GR_PC,
1997 GR_CC0,
1998 GR_STACK_POINTER,
1999 GR_FRAME_POINTER,
2000 /* For register elimination to work properly these hard_frame_pointer_rtx,
2001 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2002 the same register. */
2003 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2004 GR_ARG_POINTER = GR_FRAME_POINTER,
2005 #endif
2006 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
2007 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2008 #else
2009 GR_HARD_FRAME_POINTER,
2010 #endif
2011 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2012 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2013 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2014 #else
2015 GR_ARG_POINTER,
2016 #endif
2017 #endif
2018 GR_VIRTUAL_INCOMING_ARGS,
2019 GR_VIRTUAL_STACK_ARGS,
2020 GR_VIRTUAL_STACK_DYNAMIC,
2021 GR_VIRTUAL_OUTGOING_ARGS,
2022 GR_VIRTUAL_CFA,
2023
2024 GR_MAX
2025 };
2026
2027 /* Pointers to standard pieces of rtx are stored here. */
2028 extern GTY(()) rtx global_rtl[GR_MAX];
2029
2030 /* Standard pieces of rtx, to be substituted directly into things. */
2031 #define pc_rtx (global_rtl[GR_PC])
2032 #define cc0_rtx (global_rtl[GR_CC0])
2033
2034 /* All references to certain hard regs, except those created
2035 by allocating pseudo regs into them (when that's possible),
2036 go through these unique rtx objects. */
2037 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2038 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2039 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2040 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2041
2042 extern GTY(()) rtx pic_offset_table_rtx;
2043 extern GTY(()) rtx return_address_pointer_rtx;
2044
2045 /* Include the RTL generation functions. */
2046
2047 #ifndef GENERATOR_FILE
2048 #include "genrtl.h"
2049 #undef gen_rtx_ASM_INPUT
2050 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2051 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2052 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2053 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2054 #endif
2055
2056 /* There are some RTL codes that require special attention; the
2057 generation functions included above do the raw handling. If you
2058 add to this list, modify special_rtx in gengenrtl.c as well. */
2059
2060 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2061 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2062 extern rtx gen_raw_REG (enum machine_mode, int);
2063 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2064 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2065 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2066
2067 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2068
2069 /* Virtual registers are used during RTL generation to refer to locations into
2070 the stack frame when the actual location isn't known until RTL generation
2071 is complete. The routine instantiate_virtual_regs replaces these with
2072 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2073 a constant. */
2074
2075 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2076
2077 /* This points to the first word of the incoming arguments passed on the stack,
2078 either by the caller or by the callee when pretending it was passed by the
2079 caller. */
2080
2081 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2082
2083 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2084
2085 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2086 variable on the stack. Otherwise, it points to the first variable on
2087 the stack. */
2088
2089 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2090
2091 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2092
2093 /* This points to the location of dynamically-allocated memory on the stack
2094 immediately after the stack pointer has been adjusted by the amount
2095 desired. */
2096
2097 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2098
2099 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2100
2101 /* This points to the location in the stack at which outgoing arguments should
2102 be written when the stack is pre-pushed (arguments pushed using push
2103 insns always use sp). */
2104
2105 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2106
2107 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2108
2109 /* This points to the Canonical Frame Address of the function. This
2110 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2111 but is calculated relative to the arg pointer for simplicity; the
2112 frame pointer nor stack pointer are necessarily fixed relative to
2113 the CFA until after reload. */
2114
2115 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2116
2117 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2118
2119 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2120
2121 /* Nonzero if REGNUM is a pointer into the stack frame. */
2122 #define REGNO_PTR_FRAME_P(REGNUM) \
2123 ((REGNUM) == STACK_POINTER_REGNUM \
2124 || (REGNUM) == FRAME_POINTER_REGNUM \
2125 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2126 || (REGNUM) == ARG_POINTER_REGNUM \
2127 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2128 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2129
2130 /* REGNUM never really appearing in the INSN stream. */
2131 #define INVALID_REGNUM (~(unsigned int) 0)
2132
2133 extern rtx output_constant_def (tree, int);
2134 extern rtx lookup_constant_def (tree);
2135
2136 /* Nonzero after end of reload pass.
2137 Set to 1 or 0 by reload1.c. */
2138
2139 extern int reload_completed;
2140
2141 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2142 extern int epilogue_completed;
2143
2144 /* Set to 1 while reload_as_needed is operating.
2145 Required by some machines to handle any generated moves differently. */
2146
2147 extern int reload_in_progress;
2148
2149 /* This macro indicates whether you may create a new
2150 pseudo-register. */
2151
2152 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2153
2154 #ifdef STACK_REGS
2155 /* Nonzero after end of regstack pass.
2156 Set to 1 or 0 by reg-stack.c. */
2157 extern int regstack_completed;
2158 #endif
2159
2160 /* If this is nonzero, we do not bother generating VOLATILE
2161 around volatile memory references, and we are willing to
2162 output indirect addresses. If cse is to follow, we reject
2163 indirect addresses so a useful potential cse is generated;
2164 if it is used only once, instruction combination will produce
2165 the same indirect address eventually. */
2166 extern int cse_not_expected;
2167
2168 /* Translates rtx code to tree code, for those codes needed by
2169 REAL_ARITHMETIC. The function returns an int because the caller may not
2170 know what `enum tree_code' means. */
2171
2172 extern int rtx_to_tree_code (enum rtx_code);
2173
2174 /* In cse.c */
2175 extern int delete_trivially_dead_insns (rtx, int);
2176 extern int cse_main (rtx, int);
2177 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2178 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2179
2180 /* In jump.c */
2181 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2182 extern int condjump_p (const_rtx);
2183 extern int any_condjump_p (const_rtx);
2184 extern int any_uncondjump_p (const_rtx);
2185 extern rtx pc_set (const_rtx);
2186 extern rtx condjump_label (const_rtx);
2187 extern int simplejump_p (const_rtx);
2188 extern int returnjump_p (rtx);
2189 extern int eh_returnjump_p (rtx);
2190 extern int onlyjump_p (const_rtx);
2191 extern int only_sets_cc0_p (const_rtx);
2192 extern int sets_cc0_p (const_rtx);
2193 extern int invert_jump_1 (rtx, rtx);
2194 extern int invert_jump (rtx, rtx, int);
2195 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2196 extern int true_regnum (const_rtx);
2197 extern unsigned int reg_or_subregno (const_rtx);
2198 extern int redirect_jump_1 (rtx, rtx);
2199 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2200 extern int redirect_jump (rtx, rtx, int);
2201 extern void rebuild_jump_labels (rtx);
2202 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2203 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2204 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2205 const_rtx, const_rtx);
2206 extern void delete_for_peephole (rtx, rtx);
2207 extern int condjump_in_parallel_p (const_rtx);
2208
2209 /* In emit-rtl.c. */
2210 extern int max_reg_num (void);
2211 extern int max_label_num (void);
2212 extern int get_first_label_num (void);
2213 extern void maybe_set_first_label_num (rtx);
2214 extern void delete_insns_since (rtx);
2215 extern void mark_reg_pointer (rtx, int);
2216 extern void mark_user_reg (rtx);
2217 extern void reset_used_flags (rtx);
2218 extern void set_used_flags (rtx);
2219 extern void reorder_insns (rtx, rtx, rtx);
2220 extern void reorder_insns_nobb (rtx, rtx, rtx);
2221 extern int get_max_uid (void);
2222 extern int get_max_insn_count (void);
2223 extern int in_sequence_p (void);
2224 extern void force_next_line_note (void);
2225 extern void init_emit (void);
2226 extern void init_emit_regs (void);
2227 extern void init_emit_once (void);
2228 extern void push_topmost_sequence (void);
2229 extern void pop_topmost_sequence (void);
2230 extern void set_new_first_and_last_insn (rtx, rtx);
2231 extern unsigned int unshare_all_rtl (void);
2232 extern void unshare_all_rtl_again (rtx);
2233 extern void unshare_all_rtl_in_chain (rtx);
2234 extern void verify_rtl_sharing (void);
2235 extern void set_first_insn (rtx);
2236 extern void set_last_insn (rtx);
2237 extern void link_cc0_insns (rtx);
2238 extern void add_insn (rtx);
2239 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2240 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2241 extern void remove_insn (rtx);
2242 extern rtx emit (rtx);
2243 extern rtx delete_insn (rtx);
2244 extern rtx entry_of_function (void);
2245 extern void emit_insn_at_entry (rtx);
2246 extern void delete_insn_chain (rtx, rtx, bool);
2247 extern rtx unlink_insn_chain (rtx, rtx);
2248 extern rtx delete_insn_and_edges (rtx);
2249 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2250 extern rtx gen_const_mem (enum machine_mode, rtx);
2251 extern rtx gen_frame_mem (enum machine_mode, rtx);
2252 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2253 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2254 const_rtx, unsigned int);
2255
2256 /* In combine.c */
2257 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2258 extern rtx remove_death (unsigned int, rtx);
2259 extern void dump_combine_stats (FILE *);
2260 extern void dump_combine_total_stats (FILE *);
2261
2262 /* In cfgcleanup.c */
2263 extern void delete_dead_jumptables (void);
2264
2265 /* In sched-vis.c. */
2266 extern void debug_bb_n_slim (int);
2267 extern void debug_bb_slim (struct basic_block_def *);
2268 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2269 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2270 extern void dump_insn_slim (FILE *f, rtx x);
2271 extern void debug_insn_slim (rtx x);
2272
2273 /* In sched-rgn.c. */
2274 extern void schedule_insns (void);
2275
2276 /* In sched-ebb.c. */
2277 extern void schedule_ebbs (void);
2278
2279 /* In haifa-sched.c. */
2280 extern void fix_sched_param (const char *, const char *);
2281
2282 /* In sel-sched-dump.c. */
2283 extern void sel_sched_fix_param (const char *param, const char *val);
2284
2285 /* In print-rtl.c */
2286 extern const char *print_rtx_head;
2287 extern void debug_rtx (const_rtx);
2288 extern void debug_rtx_list (const_rtx, int);
2289 extern void debug_rtx_range (const_rtx, const_rtx);
2290 extern const_rtx debug_rtx_find (const_rtx, int);
2291 extern void print_mem_expr (FILE *, const_tree);
2292 extern void print_rtl (FILE *, const_rtx);
2293 extern void print_simple_rtl (FILE *, const_rtx);
2294 extern int print_rtl_single (FILE *, const_rtx);
2295 extern void print_inline_rtx (FILE *, const_rtx, int);
2296
2297 /* In function.c */
2298 extern void reposition_prologue_and_epilogue_notes (void);
2299 extern int prologue_epilogue_contains (const_rtx);
2300 extern int sibcall_epilogue_contains (const_rtx);
2301 extern void mark_temp_addr_taken (rtx);
2302 extern void update_temp_slot_address (rtx, rtx);
2303 extern void maybe_copy_epilogue_insn (rtx, rtx);
2304
2305 /* In stmt.c */
2306 extern void expand_null_return (void);
2307 extern void expand_naked_return (void);
2308 extern void emit_jump (rtx);
2309
2310 /* In expr.c */
2311 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2312 unsigned int, int);
2313
2314 /* In cfgrtl.c */
2315 extern void print_rtl_with_bb (FILE *, const_rtx);
2316
2317 /* In cfg.c. */
2318 extern void dump_reg_info (FILE *);
2319 extern void dump_flow_info (FILE *, int);
2320
2321 /* In expmed.c */
2322 extern void init_expmed (void);
2323 extern void expand_inc (rtx, rtx);
2324 extern void expand_dec (rtx, rtx);
2325
2326 /* In gcse.c */
2327 extern bool can_copy_p (enum machine_mode);
2328 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2329 extern rtx fis_get_condition (rtx);
2330
2331 /* In ira.c */
2332 #ifdef HARD_CONST
2333 extern HARD_REG_SET eliminable_regset;
2334 #endif
2335 extern void mark_elimination (int, int);
2336
2337 /* In reginfo.c */
2338 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2339 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2340 extern void globalize_reg (int);
2341 extern void init_reg_modes_target (void);
2342 extern void init_regs (void);
2343 extern void reinit_regs (void);
2344 extern void init_fake_stack_mems (void);
2345 extern void save_register_info (void);
2346 extern void init_reg_sets (void);
2347 extern void regclass (rtx, int);
2348 extern void reg_scan (rtx, unsigned int);
2349 extern void fix_register (const char *, int, int);
2350 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2351 enum machine_mode);
2352
2353 /* In reorg.c */
2354 extern void dbr_schedule (rtx);
2355
2356 /* In reload1.c */
2357 extern int function_invariant_p (const_rtx);
2358
2359 /* In calls.c */
2360 enum libcall_type
2361 {
2362 LCT_NORMAL = 0,
2363 LCT_CONST = 1,
2364 LCT_PURE = 2,
2365 LCT_NORETURN = 3,
2366 LCT_THROW = 4,
2367 LCT_RETURNS_TWICE = 5
2368 };
2369
2370 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2371 ...);
2372 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2373 enum machine_mode, int, ...);
2374
2375 /* In varasm.c */
2376 extern void init_varasm_once (void);
2377 extern enum tls_model decl_default_tls_model (const_tree);
2378
2379 /* In rtl.c */
2380 extern void traverse_md_constants (int (*) (void **, void *), void *);
2381 struct md_constant { char *name, *value; };
2382
2383 /* In read-rtl.c */
2384 extern int read_skip_spaces (FILE *);
2385 extern bool read_rtx (FILE *, rtx *, int *);
2386 extern void copy_rtx_ptr_loc (const void *, const void *);
2387 extern void print_rtx_ptr_loc (const void *);
2388 extern const char *join_c_conditions (const char *, const char *);
2389 extern void print_c_condition (const char *);
2390 extern const char *read_rtx_filename;
2391 extern int read_rtx_lineno;
2392
2393 /* In alias.c */
2394 extern rtx canon_rtx (rtx);
2395 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2396 extern rtx get_addr (rtx);
2397 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2398 rtx, bool (*)(const_rtx, bool));
2399 extern int read_dependence (const_rtx, const_rtx);
2400 extern int anti_dependence (const_rtx, const_rtx);
2401 extern int output_dependence (const_rtx, const_rtx);
2402 extern void init_alias_target (void);
2403 extern void init_alias_analysis (void);
2404 extern void end_alias_analysis (void);
2405 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2406 extern rtx find_base_term (rtx);
2407 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2408 extern rtx get_reg_known_value (unsigned int);
2409 extern bool get_reg_known_equiv_p (unsigned int);
2410
2411 #ifdef STACK_REGS
2412 extern int stack_regs_mentioned (const_rtx insn);
2413 #endif
2414
2415 /* In toplev.c */
2416 extern GTY(()) rtx stack_limit_rtx;
2417
2418 /* In predict.c */
2419 extern void invert_br_probabilities (rtx);
2420 extern bool expensive_function_p (int);
2421 /* In cfgexpand.c */
2422 extern void add_reg_br_prob_note (rtx last, int probability);
2423
2424 /* In var-tracking.c */
2425 extern unsigned int variable_tracking_main (void);
2426
2427 /* In stor-layout.c. */
2428 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2429 rtx *, rtx *);
2430
2431 /* In loop-unswitch.c */
2432 extern rtx reversed_condition (rtx);
2433 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2434
2435 /* In loop-iv.c */
2436 extern rtx canon_condition (rtx);
2437 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2438
2439 /* In final.c */
2440 extern unsigned int compute_alignments (void);
2441 extern int asm_str_count (const char *templ);
2442 \f
2443 struct rtl_hooks
2444 {
2445 rtx (*gen_lowpart) (enum machine_mode, rtx);
2446 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2447 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2448 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2449 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2450 unsigned int, unsigned int *);
2451 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2452
2453 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2454 };
2455
2456 /* Each pass can provide its own. */
2457 extern struct rtl_hooks rtl_hooks;
2458
2459 /* ... but then it has to restore these. */
2460 extern const struct rtl_hooks general_rtl_hooks;
2461
2462 /* Keep this for the nonce. */
2463 #define gen_lowpart rtl_hooks.gen_lowpart
2464
2465 extern void insn_locators_alloc (void);
2466 extern void insn_locators_free (void);
2467 extern void insn_locators_finalize (void);
2468 extern void set_curr_insn_source_location (location_t);
2469 extern location_t get_curr_insn_source_location (void);
2470 extern void set_curr_insn_block (tree);
2471 extern tree get_curr_insn_block (void);
2472 extern int curr_insn_locator (void);
2473 extern bool optimize_insn_for_size_p (void);
2474 extern bool optimize_insn_for_speed_p (void);
2475
2476 #endif /* ! GCC_RTL_H */
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