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re PR debug/43478 (Missing DW_AT_location for a variable)
[gcc.git] / gcc / rtl.h
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, 2010
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 true iff X is an rtx for a double-int
379 or floating point constant. */
380 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
381
382 /* Predicate yielding nonzero iff X is a label insn. */
383 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
384
385 /* Predicate yielding nonzero iff X is a jump insn. */
386 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
387
388 /* Predicate yielding nonzero iff X is a call insn. */
389 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
390
391 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
392 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
393
394 /* Predicate yielding nonzero iff X is a debug note/insn. */
395 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
396
397 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
398 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
399
400 /* Nonzero if DEBUG_INSN_P may possibly hold. */
401 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
402
403 /* Predicate yielding nonzero iff X is a real insn. */
404 #define INSN_P(X) \
405 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
406
407 /* Predicate yielding nonzero iff X is a note insn. */
408 #define NOTE_P(X) (GET_CODE (X) == NOTE)
409
410 /* Predicate yielding nonzero iff X is a barrier insn. */
411 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
412
413 /* Predicate yielding nonzero iff X is a data for a jump table. */
414 #define JUMP_TABLE_DATA_P(INSN) \
415 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
416 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
417
418 /* 1 if X is a unary operator. */
419
420 #define UNARY_P(X) \
421 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
422
423 /* 1 if X is a binary operator. */
424
425 #define BINARY_P(X) \
426 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
427
428 /* 1 if X is an arithmetic operator. */
429
430 #define ARITHMETIC_P(X) \
431 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
432 == RTX_ARITHMETIC_RESULT)
433
434 /* 1 if X is an arithmetic operator. */
435
436 #define COMMUTATIVE_ARITH_P(X) \
437 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
438
439 /* 1 if X is a commutative arithmetic operator or a comparison operator.
440 These two are sometimes selected together because it is possible to
441 swap the two operands. */
442
443 #define SWAPPABLE_OPERANDS_P(X) \
444 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
445 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
446 | (1 << RTX_COMPARE)))
447
448 /* 1 if X is a non-commutative operator. */
449
450 #define NON_COMMUTATIVE_P(X) \
451 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
452 == RTX_NON_COMMUTATIVE_RESULT)
453
454 /* 1 if X is a commutative operator on integers. */
455
456 #define COMMUTATIVE_P(X) \
457 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
458 == RTX_COMMUTATIVE_RESULT)
459
460 /* 1 if X is a relational operator. */
461
462 #define COMPARISON_P(X) \
463 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
464
465 /* 1 if X is a constant value that is an integer. */
466
467 #define CONSTANT_P(X) \
468 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
469
470 /* 1 if X can be used to represent an object. */
471 #define OBJECT_P(X) \
472 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
473
474 /* General accessor macros for accessing the fields of an rtx. */
475
476 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
477 /* The bit with a star outside the statement expr and an & inside is
478 so that N can be evaluated only once. */
479 #define RTL_CHECK1(RTX, N, C1) __extension__ \
480 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
481 const enum rtx_code _code = GET_CODE (_rtx); \
482 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
483 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
484 __FUNCTION__); \
485 if (GET_RTX_FORMAT(_code)[_n] != C1) \
486 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
487 __FUNCTION__); \
488 &_rtx->u.fld[_n]; }))
489
490 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
491 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
492 const enum rtx_code _code = GET_CODE (_rtx); \
493 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
494 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
495 __FUNCTION__); \
496 if (GET_RTX_FORMAT(_code)[_n] != C1 \
497 && GET_RTX_FORMAT(_code)[_n] != C2) \
498 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
499 __FUNCTION__); \
500 &_rtx->u.fld[_n]; }))
501
502 #define RTL_CHECKC1(RTX, N, C) __extension__ \
503 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
504 if (GET_CODE (_rtx) != (C)) \
505 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
506 __FUNCTION__); \
507 &_rtx->u.fld[_n]; }))
508
509 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
510 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
511 const enum rtx_code _code = GET_CODE (_rtx); \
512 if (_code != (C1) && _code != (C2)) \
513 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
514 __FUNCTION__); \
515 &_rtx->u.fld[_n]; }))
516
517 #define RTVEC_ELT(RTVEC, I) __extension__ \
518 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
519 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
520 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
521 __FUNCTION__); \
522 &_rtvec->elem[_i]; }))
523
524 #define XWINT(RTX, N) __extension__ \
525 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
526 const enum rtx_code _code = GET_CODE (_rtx); \
527 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
528 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
529 __FUNCTION__); \
530 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
531 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
532 __FUNCTION__); \
533 &_rtx->u.hwint[_n]; }))
534
535 #define XCWINT(RTX, N, C) __extension__ \
536 (*({ __typeof (RTX) const _rtx = (RTX); \
537 if (GET_CODE (_rtx) != (C)) \
538 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
539 __FUNCTION__); \
540 &_rtx->u.hwint[N]; }))
541
542 #define XCMWINT(RTX, N, C, M) __extension__ \
543 (*({ __typeof (RTX) const _rtx = (RTX); \
544 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
545 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
546 __LINE__, __FUNCTION__); \
547 &_rtx->u.hwint[N]; }))
548
549 #define XCNMPRV(RTX, C, M) __extension__ \
550 ({ __typeof (RTX) const _rtx = (RTX); \
551 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
552 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
553 __LINE__, __FUNCTION__); \
554 &_rtx->u.rv; })
555
556 #define XCNMPFV(RTX, C, M) __extension__ \
557 ({ __typeof (RTX) const _rtx = (RTX); \
558 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
559 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
560 __LINE__, __FUNCTION__); \
561 &_rtx->u.fv; })
562
563 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
564 ({ __typeof (RTX) const _symbol = (RTX); \
565 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
566 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
567 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
568 __FUNCTION__); \
569 &_symbol->u.block_sym; })
570
571 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
572 const char *)
573 ATTRIBUTE_NORETURN;
574 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
575 const char *)
576 ATTRIBUTE_NORETURN;
577 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
578 int, const char *)
579 ATTRIBUTE_NORETURN;
580 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
581 int, const char *)
582 ATTRIBUTE_NORETURN;
583 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
584 const char *, int, const char *)
585 ATTRIBUTE_NORETURN;
586 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
587 bool, const char *, int, const char *)
588 ATTRIBUTE_NORETURN;
589 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
590 ATTRIBUTE_NORETURN;
591 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
592 const char *)
593 ATTRIBUTE_NORETURN;
594
595 #else /* not ENABLE_RTL_CHECKING */
596
597 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
598 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
599 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
600 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
601 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
602 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
603 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
604 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
605 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
606 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
607 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
608 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
609
610 #endif
611
612 /* General accessor macros for accessing the flags of an rtx. */
613
614 /* Access an individual rtx flag, with no checking of any kind. */
615 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
616
617 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
618 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
619 ({ __typeof (RTX) const _rtx = (RTX); \
620 if (GET_CODE(_rtx) != C1) \
621 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
622 __FUNCTION__); \
623 _rtx; })
624
625 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
626 ({ __typeof (RTX) const _rtx = (RTX); \
627 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
628 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
629 __FUNCTION__); \
630 _rtx; })
631
632 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
633 ({ __typeof (RTX) const _rtx = (RTX); \
634 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
635 && GET_CODE(_rtx) != C3) \
636 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
637 __FUNCTION__); \
638 _rtx; })
639
640 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
641 ({ __typeof (RTX) const _rtx = (RTX); \
642 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
643 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
644 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
645 __FUNCTION__); \
646 _rtx; })
647
648 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
649 ({ __typeof (RTX) const _rtx = (RTX); \
650 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
651 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
652 && GET_CODE(_rtx) != C5) \
653 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
654 __FUNCTION__); \
655 _rtx; })
656
657 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
658 __extension__ \
659 ({ __typeof (RTX) const _rtx = (RTX); \
660 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
661 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
662 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
663 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
664 __FUNCTION__); \
665 _rtx; })
666
667 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
668 __extension__ \
669 ({ __typeof (RTX) const _rtx = (RTX); \
670 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
671 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
672 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
673 && GET_CODE(_rtx) != C7) \
674 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
675 __FUNCTION__); \
676 _rtx; })
677
678 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
679 __extension__ \
680 ({ __typeof (RTX) const _rtx = (RTX); \
681 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
682 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
683 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
684 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
685 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
686 __FUNCTION__); \
687 _rtx; })
688
689 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
690 int, const char *)
691 ATTRIBUTE_NORETURN
692 ;
693
694 #else /* not ENABLE_RTL_FLAG_CHECKING */
695
696 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
697 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
698 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
699 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
700 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
701 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
702 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
703 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
704 #endif
705
706 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
707 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
708 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
709 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
710 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
711 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
712 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
713 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
714 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
715
716 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
717 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
718
719 /* These are like XINT, etc. except that they expect a '0' field instead
720 of the normal type code. */
721
722 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
723 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
724 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
725 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
726 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
727 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
728 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
729 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
730 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
731 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
732 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
733 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
734 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
735 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
736
737 /* Access a '0' field with any type. */
738 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
739
740 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
741 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
742 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
743 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
744 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
745 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
746 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
747 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
748 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
749 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
750
751 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
752 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
753
754 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
755 \f
756 /* ACCESS MACROS for particular fields of insns. */
757
758 /* Holds a unique number for each insn.
759 These are not necessarily sequentially increasing. */
760 #define INSN_UID(INSN) XINT (INSN, 0)
761
762 /* Chain insns together in sequence. */
763 #define PREV_INSN(INSN) XEXP (INSN, 1)
764 #define NEXT_INSN(INSN) XEXP (INSN, 2)
765
766 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
767 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
768 /* LOCATION of an RTX if relevant. */
769 #define RTL_LOCATION(X) (INSN_P (X) ? \
770 locator_location (INSN_LOCATOR (X)) \
771 : UNKNOWN_LOCATION)
772 /* LOCATION of current INSN. */
773 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
774 /* The body of an insn. */
775 #define PATTERN(INSN) XEXP (INSN, 5)
776
777 /* Code number of instruction, from when it was recognized.
778 -1 means this instruction has not been recognized yet. */
779 #define INSN_CODE(INSN) XINT (INSN, 6)
780
781 #define RTX_FRAME_RELATED_P(RTX) \
782 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
783 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
784
785 /* 1 if RTX is an insn that has been deleted. */
786 #define INSN_DELETED_P(RTX) \
787 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
788 CALL_INSN, JUMP_INSN, \
789 CODE_LABEL, BARRIER, NOTE)->volatil)
790
791 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
792 TREE_READONLY. */
793 #define RTL_CONST_CALL_P(RTX) \
794 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
795
796 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
797 DECL_PURE_P. */
798 #define RTL_PURE_CALL_P(RTX) \
799 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
800
801 /* 1 if RTX is a call to a const or pure function. */
802 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
803 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
804
805 /* 1 if RTX is a call to a looping const or pure function. Built from
806 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
807 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
808 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
809
810 /* 1 if RTX is a call_insn for a sibling call. */
811 #define SIBLING_CALL_P(RTX) \
812 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
813
814 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
815 #define INSN_ANNULLED_BRANCH_P(RTX) \
816 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
817
818 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
819 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
820 executed if the branch is taken. For annulled branches with this bit
821 clear, the insn should be executed only if the branch is not taken. */
822 #define INSN_FROM_TARGET_P(RTX) \
823 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
824
825 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
826 See the comments for ADDR_DIFF_VEC in rtl.def. */
827 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
828
829 /* In a VALUE, the value cselib has assigned to RTX.
830 This is a "struct cselib_val_struct", see cselib.h. */
831 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
832
833 /* Holds a list of notes on what this insn does to various REGs.
834 It is a chain of EXPR_LIST rtx's, where the second operand is the
835 chain pointer and the first operand is the REG being described.
836 The mode field of the EXPR_LIST contains not a real machine mode
837 but a value from enum reg_note. */
838 #define REG_NOTES(INSN) XEXP(INSN, 7)
839
840 enum reg_note
841 {
842 #define DEF_REG_NOTE(NAME) NAME,
843 #include "reg-notes.def"
844 #undef DEF_REG_NOTE
845 REG_NOTE_MAX
846 };
847
848 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
849 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
850 #define PUT_REG_NOTE_KIND(LINK, KIND) \
851 PUT_MODE (LINK, (enum machine_mode) (KIND))
852
853 /* Names for REG_NOTE's in EXPR_LIST insn's. */
854
855 extern const char * const reg_note_name[];
856 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
857
858 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
859 USE and CLOBBER expressions.
860 USE expressions list the registers filled with arguments that
861 are passed to the function.
862 CLOBBER expressions document the registers explicitly clobbered
863 by this CALL_INSN.
864 Pseudo registers can not be mentioned in this list. */
865 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
866
867 /* The label-number of a code-label. The assembler label
868 is made from `L' and the label-number printed in decimal.
869 Label numbers are unique in a compilation. */
870 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
871
872 /* In a NOTE that is a line number, this is a string for the file name that the
873 line is in. We use the same field to record block numbers temporarily in
874 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
875 between ints and pointers if we use a different macro for the block number.)
876 */
877
878 /* Opaque data. */
879 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
880 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
881 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
882 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
883 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
884 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
885 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
886
887 /* In a NOTE that is a line number, this is the line number.
888 Other kinds of NOTEs are identified by negative numbers here. */
889 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
890
891 /* Nonzero if INSN is a note marking the beginning of a basic block. */
892 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
893 (GET_CODE (INSN) == NOTE \
894 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
895
896 /* Variable declaration and the location of a variable. */
897 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
898 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
899
900 /* Initialization status of the variable in the location. Status
901 can be unknown, uninitialized or initialized. See enumeration
902 type below. */
903 #define PAT_VAR_LOCATION_STATUS(PAT) \
904 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
905
906 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
907 #define NOTE_VAR_LOCATION_DECL(NOTE) \
908 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
909 #define NOTE_VAR_LOCATION_LOC(NOTE) \
910 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
911 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
912 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
913
914 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
915 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
916
917 /* Accessors for a tree-expanded var location debug insn. */
918 #define INSN_VAR_LOCATION_DECL(INSN) \
919 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
920 #define INSN_VAR_LOCATION_LOC(INSN) \
921 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
922 #define INSN_VAR_LOCATION_STATUS(INSN) \
923 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
924
925 /* Expand to the RTL that denotes an unknown variable location in a
926 DEBUG_INSN. */
927 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
928
929 /* Determine whether X is such an unknown location. */
930 #define VAR_LOC_UNKNOWN_P(X) \
931 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
932
933 /* 1 if RTX is emitted after a call, but it should take effect before
934 the call returns. */
935 #define NOTE_DURING_CALL_P(RTX) \
936 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
937
938 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
939 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
940
941 /* Possible initialization status of a variable. When requested
942 by the user, this information is tracked and recorded in the DWARF
943 debug information, along with the variable's location. */
944 enum var_init_status
945 {
946 VAR_INIT_STATUS_UNKNOWN,
947 VAR_INIT_STATUS_UNINITIALIZED,
948 VAR_INIT_STATUS_INITIALIZED
949 };
950
951 /* Codes that appear in the NOTE_KIND field for kinds of notes
952 that are not line numbers. These codes are all negative.
953
954 Notice that we do not try to use zero here for any of
955 the special note codes because sometimes the source line
956 actually can be zero! This happens (for example) when we
957 are generating code for the per-translation-unit constructor
958 and destructor routines for some C++ translation unit. */
959
960 enum insn_note
961 {
962 #define DEF_INSN_NOTE(NAME) NAME,
963 #include "insn-notes.def"
964 #undef DEF_INSN_NOTE
965
966 NOTE_INSN_MAX
967 };
968
969 /* Names for NOTE insn's other than line numbers. */
970
971 extern const char * const note_insn_name[NOTE_INSN_MAX];
972 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
973 (note_insn_name[(NOTE_CODE)])
974
975 /* The name of a label, in case it corresponds to an explicit label
976 in the input source code. */
977 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
978
979 /* In jump.c, each label contains a count of the number
980 of LABEL_REFs that point at it, so unused labels can be deleted. */
981 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
982
983 /* Labels carry a two-bit field composed of the ->jump and ->call
984 bits. This field indicates whether the label is an alternate
985 entry point, and if so, what kind. */
986 enum label_kind
987 {
988 LABEL_NORMAL = 0, /* ordinary label */
989 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
990 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
991 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
992 };
993
994 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
995
996 /* Retrieve the kind of LABEL. */
997 #define LABEL_KIND(LABEL) __extension__ \
998 ({ __typeof (LABEL) const _label = (LABEL); \
999 if (GET_CODE (_label) != CODE_LABEL) \
1000 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1001 __FUNCTION__); \
1002 (enum label_kind) ((_label->jump << 1) | _label->call); })
1003
1004 /* Set the kind of LABEL. */
1005 #define SET_LABEL_KIND(LABEL, KIND) do { \
1006 __typeof (LABEL) const _label = (LABEL); \
1007 const unsigned int _kind = (KIND); \
1008 if (GET_CODE (_label) != CODE_LABEL) \
1009 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1010 __FUNCTION__); \
1011 _label->jump = ((_kind >> 1) & 1); \
1012 _label->call = (_kind & 1); \
1013 } while (0)
1014
1015 #else
1016
1017 /* Retrieve the kind of LABEL. */
1018 #define LABEL_KIND(LABEL) \
1019 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1020
1021 /* Set the kind of LABEL. */
1022 #define SET_LABEL_KIND(LABEL, KIND) do { \
1023 rtx const _label = (LABEL); \
1024 const unsigned int _kind = (KIND); \
1025 _label->jump = ((_kind >> 1) & 1); \
1026 _label->call = (_kind & 1); \
1027 } while (0)
1028
1029 #endif /* rtl flag checking */
1030
1031 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1032
1033 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1034 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1035 be decremented and possibly the label can be deleted. */
1036 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1037
1038 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1039 goes through all the LABEL_REFs that jump to that label. The chain
1040 eventually winds up at the CODE_LABEL: it is circular. */
1041 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1042 \f
1043 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1044 be used on RHS. Use SET_REGNO to change the value. */
1045 #define REGNO(RTX) (rhs_regno(RTX))
1046 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1047
1048 /* ORIGINAL_REGNO holds the number the register originally had; for a
1049 pseudo register turned into a hard reg this will hold the old pseudo
1050 register number. */
1051 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1052
1053 /* Force the REGNO macro to only be used on the lhs. */
1054 static inline unsigned int
1055 rhs_regno (const_rtx x)
1056 {
1057 return XCUINT (x, 0, REG);
1058 }
1059
1060
1061
1062 /* 1 if RTX is a reg or parallel that is the current function's return
1063 value. */
1064 #define REG_FUNCTION_VALUE_P(RTX) \
1065 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1066
1067 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1068 #define REG_USERVAR_P(RTX) \
1069 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1070
1071 /* 1 if RTX is a reg that holds a pointer value. */
1072 #define REG_POINTER(RTX) \
1073 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1074
1075 /* 1 if RTX is a mem that holds a pointer value. */
1076 #define MEM_POINTER(RTX) \
1077 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1078
1079 /* 1 if the given register REG corresponds to a hard register. */
1080 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1081
1082 /* 1 if the given register number REG_NO corresponds to a hard register. */
1083 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1084
1085 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1086 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1087 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1088
1089 /* For a CONST_DOUBLE:
1090 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1091 low-order word and ..._HIGH the high-order.
1092 For a float, there is a REAL_VALUE_TYPE structure, and
1093 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1094 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1095 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1096 #define CONST_DOUBLE_REAL_VALUE(r) \
1097 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1098
1099 #define CONST_FIXED_VALUE(r) \
1100 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1101 #define CONST_FIXED_VALUE_HIGH(r) \
1102 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1103 #define CONST_FIXED_VALUE_LOW(r) \
1104 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1105
1106 /* For a CONST_VECTOR, return element #n. */
1107 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1108
1109 /* For a CONST_VECTOR, return the number of elements in a vector. */
1110 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1111
1112 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1113 SUBREG_BYTE extracts the byte-number. */
1114
1115 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1116 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1117
1118 /* in rtlanal.c */
1119 /* Return the right cost to give to an operation
1120 to make the cost of the corresponding register-to-register instruction
1121 N times that of a fast register-to-register instruction. */
1122 #define COSTS_N_INSNS(N) ((N) * 4)
1123
1124 /* Maximum cost of an rtl expression. This value has the special meaning
1125 not to use an rtx with this cost under any circumstances. */
1126 #define MAX_COST INT_MAX
1127
1128 extern void init_rtlanal (void);
1129 extern int rtx_cost (rtx, enum rtx_code, bool);
1130 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1131 extern unsigned int subreg_lsb (const_rtx);
1132 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1133 unsigned int);
1134 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1135 unsigned int, enum machine_mode);
1136 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1137 unsigned int, enum machine_mode);
1138 extern unsigned int subreg_regno (const_rtx);
1139 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1140 unsigned int, enum machine_mode);
1141 extern unsigned int subreg_nregs (const_rtx);
1142 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1143 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1144 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1145 extern bool constant_pool_constant_p (rtx);
1146 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1147 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1148
1149
1150 /* 1 if RTX is a subreg containing a reg that is already known to be
1151 sign- or zero-extended from the mode of the subreg to the mode of
1152 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1153 extension.
1154
1155 When used as a LHS, is means that this extension must be done
1156 when assigning to SUBREG_REG. */
1157
1158 #define SUBREG_PROMOTED_VAR_P(RTX) \
1159 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1160
1161 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1162 do { \
1163 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1164 if ((VAL) < 0) \
1165 _rtx->volatil = 1; \
1166 else { \
1167 _rtx->volatil = 0; \
1168 _rtx->unchanging = (VAL); \
1169 } \
1170 } while (0)
1171
1172 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1173 this gives the necessary extensions:
1174 0 - signed
1175 1 - normal unsigned
1176 -1 - pointer unsigned, which most often can be handled like unsigned
1177 extension, except for generating instructions where we need to
1178 emit special code (ptr_extend insns) on some architectures. */
1179
1180 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1181 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1182 ? -1 : (int) (RTX)->unchanging)
1183
1184 /* Access various components of an ASM_OPERANDS rtx. */
1185
1186 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1187 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1188 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1189 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1190 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1191 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1192 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1193 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1194 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1195 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1196 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1197 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1198 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1199 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1200 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1201 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1202 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1203 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1204
1205 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1206 #define MEM_READONLY_P(RTX) \
1207 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1208
1209 /* 1 if RTX is a mem and we should keep the alias set for this mem
1210 unchanged when we access a component. Set to 1, or example, when we
1211 are already in a non-addressable component of an aggregate. */
1212 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1213 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1214
1215 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1216 #define MEM_VOLATILE_P(RTX) \
1217 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1218 ASM_INPUT)->volatil)
1219
1220 /* 1 if RTX is a mem that refers to an aggregate, either to the
1221 aggregate itself or to a field of the aggregate. If zero, RTX may
1222 or may not be such a reference. */
1223 #define MEM_IN_STRUCT_P(RTX) \
1224 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1225
1226 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1227 not refer to a scalar. */
1228 #define MEM_SCALAR_P(RTX) \
1229 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1230
1231 /* 1 if RTX is a mem that cannot trap. */
1232 #define MEM_NOTRAP_P(RTX) \
1233 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1234
1235 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1236 RTX. Otherwise, vice versa. Use this macro only when you are
1237 *sure* that you know that the MEM is in a structure, or is a
1238 scalar. VAL is evaluated only once. */
1239 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1240 do { \
1241 if (VAL) \
1242 { \
1243 MEM_IN_STRUCT_P (RTX) = 1; \
1244 MEM_SCALAR_P (RTX) = 0; \
1245 } \
1246 else \
1247 { \
1248 MEM_IN_STRUCT_P (RTX) = 0; \
1249 MEM_SCALAR_P (RTX) = 1; \
1250 } \
1251 } while (0)
1252
1253 /* The memory attribute block. We provide access macros for each value
1254 in the block and provide defaults if none specified. */
1255 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1256
1257 /* The register attribute block. We provide access macros for each value
1258 in the block and provide defaults if none specified. */
1259 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1260
1261 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1262 set, and may alias anything. Otherwise, the MEM can only alias
1263 MEMs in a conflicting alias set. This value is set in a
1264 language-dependent manner in the front-end, and should not be
1265 altered in the back-end. These set numbers are tested with
1266 alias_sets_conflict_p. */
1267 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1268
1269 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1270 refer to part of a DECL. It may also be a COMPONENT_REF. */
1271 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1272
1273 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1274 RTX that is always a CONST_INT. */
1275 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1276
1277 /* For a MEM rtx, the address space. */
1278 #define MEM_ADDR_SPACE(RTX) (MEM_ATTRS (RTX) == 0 ? ADDR_SPACE_GENERIC \
1279 : MEM_ATTRS (RTX)->addrspace)
1280
1281 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1282 is always a CONST_INT. */
1283 #define MEM_SIZE(RTX) \
1284 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1285 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1286 : 0)
1287
1288 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1289 mode as a default when STRICT_ALIGNMENT, but not if not. */
1290 #define MEM_ALIGN(RTX) \
1291 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1292 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1293 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1294
1295 /* For a REG rtx, the decl it is known to refer to, if it is known to
1296 refer to part of a DECL. */
1297 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1298
1299 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1300 HOST_WIDE_INT. */
1301 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1302
1303 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1304 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1305 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1306 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1307 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1308 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1309 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1310 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1311 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1312 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1313
1314 /* 1 if RTX is a label_ref for a nonlocal label. */
1315 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1316 REG_LABEL_TARGET note. */
1317 #define LABEL_REF_NONLOCAL_P(RTX) \
1318 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1319
1320 /* 1 if RTX is a code_label that should always be considered to be needed. */
1321 #define LABEL_PRESERVE_P(RTX) \
1322 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1323
1324 /* During sched, 1 if RTX is an insn that must be scheduled together
1325 with the preceding insn. */
1326 #define SCHED_GROUP_P(RTX) \
1327 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1328 JUMP_INSN, CALL_INSN \
1329 )->in_struct)
1330
1331 /* For a SET rtx, SET_DEST is the place that is set
1332 and SET_SRC is the value it is set to. */
1333 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1334 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1335 #define SET_IS_RETURN_P(RTX) \
1336 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1337
1338 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1339 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1340 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1341
1342 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1343 conditionally executing the code on, COND_EXEC_CODE is the code
1344 to execute if the condition is true. */
1345 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1346 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1347
1348 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1349 constants pool. */
1350 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1351 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1352
1353 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1354 tree constant pool. This information is private to varasm.c. */
1355 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1356 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1357 (RTX), SYMBOL_REF)->frame_related)
1358
1359 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1360 #define SYMBOL_REF_FLAG(RTX) \
1361 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1362
1363 /* 1 if RTX is a symbol_ref that has been the library function in
1364 emit_library_call. */
1365 #define SYMBOL_REF_USED(RTX) \
1366 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1367
1368 /* 1 if RTX is a symbol_ref for a weak symbol. */
1369 #define SYMBOL_REF_WEAK(RTX) \
1370 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1371
1372 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1373 SYMBOL_REF_CONSTANT. */
1374 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1375
1376 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1377 pool symbol. */
1378 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1379 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1380
1381 /* The tree (decl or constant) associated with the symbol, or null. */
1382 #define SYMBOL_REF_DECL(RTX) \
1383 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1384
1385 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1386 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1387 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1388
1389 /* The rtx constant pool entry for a symbol, or null. */
1390 #define SYMBOL_REF_CONSTANT(RTX) \
1391 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1392
1393 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1394 information derivable from the tree decl associated with this symbol.
1395 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1396 decl. In some cases this is a bug. But beyond that, it's nice to cache
1397 this information to avoid recomputing it. Finally, this allows space for
1398 the target to store more than one bit of information, as with
1399 SYMBOL_REF_FLAG. */
1400 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1401
1402 /* These flags are common enough to be defined for all targets. They
1403 are computed by the default version of targetm.encode_section_info. */
1404
1405 /* Set if this symbol is a function. */
1406 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1407 #define SYMBOL_REF_FUNCTION_P(RTX) \
1408 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1409 /* Set if targetm.binds_local_p is true. */
1410 #define SYMBOL_FLAG_LOCAL (1 << 1)
1411 #define SYMBOL_REF_LOCAL_P(RTX) \
1412 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1413 /* Set if targetm.in_small_data_p is true. */
1414 #define SYMBOL_FLAG_SMALL (1 << 2)
1415 #define SYMBOL_REF_SMALL_P(RTX) \
1416 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1417 /* The three-bit field at [5:3] is true for TLS variables; use
1418 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1419 #define SYMBOL_FLAG_TLS_SHIFT 3
1420 #define SYMBOL_REF_TLS_MODEL(RTX) \
1421 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1422 /* Set if this symbol is not defined in this translation unit. */
1423 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1424 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1425 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1426 /* Set if this symbol has a block_symbol structure associated with it. */
1427 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1428 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1429 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1430 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1431 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1432 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1433 #define SYMBOL_REF_ANCHOR_P(RTX) \
1434 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1435
1436 /* Subsequent bits are available for the target to use. */
1437 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1438 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1439
1440 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1441 structure to which the symbol belongs, or NULL if it has not been
1442 assigned a block. */
1443 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1444
1445 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1446 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1447 RTX has not yet been assigned to a block, or it has not been given an
1448 offset within that block. */
1449 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1450
1451 /* True if RTX is flagged to be a scheduling barrier. */
1452 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1453 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1454
1455 /* Indicate whether the machine has any sort of auto increment addressing.
1456 If not, we can avoid checking for REG_INC notes. */
1457
1458 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1459 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1460 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1461 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1462 #define AUTO_INC_DEC
1463 #endif
1464
1465 /* Define a macro to look for REG_INC notes,
1466 but save time on machines where they never exist. */
1467
1468 #ifdef AUTO_INC_DEC
1469 #define FIND_REG_INC_NOTE(INSN, REG) \
1470 ((REG) != NULL_RTX && REG_P ((REG)) \
1471 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1472 : find_reg_note ((INSN), REG_INC, (REG)))
1473 #else
1474 #define FIND_REG_INC_NOTE(INSN, REG) 0
1475 #endif
1476
1477 #ifndef HAVE_PRE_INCREMENT
1478 #define HAVE_PRE_INCREMENT 0
1479 #endif
1480
1481 #ifndef HAVE_PRE_DECREMENT
1482 #define HAVE_PRE_DECREMENT 0
1483 #endif
1484
1485 #ifndef HAVE_POST_INCREMENT
1486 #define HAVE_POST_INCREMENT 0
1487 #endif
1488
1489 #ifndef HAVE_POST_DECREMENT
1490 #define HAVE_POST_DECREMENT 0
1491 #endif
1492
1493 #ifndef HAVE_POST_MODIFY_DISP
1494 #define HAVE_POST_MODIFY_DISP 0
1495 #endif
1496
1497 #ifndef HAVE_POST_MODIFY_REG
1498 #define HAVE_POST_MODIFY_REG 0
1499 #endif
1500
1501 #ifndef HAVE_PRE_MODIFY_DISP
1502 #define HAVE_PRE_MODIFY_DISP 0
1503 #endif
1504
1505 #ifndef HAVE_PRE_MODIFY_REG
1506 #define HAVE_PRE_MODIFY_REG 0
1507 #endif
1508
1509
1510 /* Some architectures do not have complete pre/post increment/decrement
1511 instruction sets, or only move some modes efficiently. These macros
1512 allow us to tune autoincrement generation. */
1513
1514 #ifndef USE_LOAD_POST_INCREMENT
1515 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1516 #endif
1517
1518 #ifndef USE_LOAD_POST_DECREMENT
1519 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1520 #endif
1521
1522 #ifndef USE_LOAD_PRE_INCREMENT
1523 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1524 #endif
1525
1526 #ifndef USE_LOAD_PRE_DECREMENT
1527 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1528 #endif
1529
1530 #ifndef USE_STORE_POST_INCREMENT
1531 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1532 #endif
1533
1534 #ifndef USE_STORE_POST_DECREMENT
1535 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1536 #endif
1537
1538 #ifndef USE_STORE_PRE_INCREMENT
1539 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1540 #endif
1541
1542 #ifndef USE_STORE_PRE_DECREMENT
1543 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1544 #endif
1545 \f
1546 /* Nonzero when we are generating CONCATs. */
1547 extern int generating_concat_p;
1548
1549 /* Nonzero when we are expanding trees to RTL. */
1550 extern int currently_expanding_to_rtl;
1551
1552 /* Generally useful functions. */
1553
1554 /* In expmed.c */
1555 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1556
1557 /* In explow.c */
1558 extern void set_stack_check_libfunc (rtx);
1559 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1560 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1561
1562 /* In emit-rtl.c */
1563 extern rtx gen_blockage (void);
1564 extern rtvec gen_rtvec (int, ...);
1565 extern rtx copy_insn_1 (rtx);
1566 extern rtx copy_insn (rtx);
1567 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1568 extern rtx emit_copy_of_insn_after (rtx, rtx);
1569 extern void set_reg_attrs_from_value (rtx, rtx);
1570 extern void set_reg_attrs_for_parm (rtx, rtx);
1571 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1572 extern void adjust_reg_mode (rtx, enum machine_mode);
1573 extern int mem_expr_equal_p (const_tree, const_tree);
1574
1575 /* In rtl.c */
1576 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1577 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1578
1579 extern rtvec rtvec_alloc (int);
1580 extern rtvec shallow_copy_rtvec (rtvec);
1581 extern bool shared_const_p (const_rtx);
1582 extern rtx copy_rtx (rtx);
1583 extern void dump_rtx_statistics (void);
1584
1585 /* In emit-rtl.c */
1586 extern rtx copy_rtx_if_shared (rtx);
1587
1588 /* In rtl.c */
1589 extern unsigned int rtx_size (const_rtx);
1590 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1591 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1592 extern int rtx_equal_p (const_rtx, const_rtx);
1593
1594 /* In emit-rtl.c */
1595 extern rtvec gen_rtvec_v (int, rtx *);
1596 extern rtx gen_reg_rtx (enum machine_mode);
1597 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1598 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1599 extern rtx gen_reg_rtx_and_attrs (rtx);
1600 extern rtx gen_label_rtx (void);
1601 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1602
1603 /* In cse.c */
1604 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1605
1606 /* In emit-rtl.c */
1607 extern rtx gen_highpart (enum machine_mode, rtx);
1608 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1609 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1610
1611 /* In emit-rtl.c */
1612 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1613 extern int subreg_lowpart_p (const_rtx);
1614 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1615 enum machine_mode);
1616 extern unsigned int subreg_highpart_offset (enum machine_mode,
1617 enum machine_mode);
1618 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1619 extern rtx make_safe_from (rtx, rtx);
1620 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1621 addr_space_t);
1622 #define convert_memory_address(to_mode,x) \
1623 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1624 extern rtx get_insns (void);
1625 extern const char *get_insn_name (int);
1626 extern rtx get_last_insn (void);
1627 extern rtx get_last_insn_anywhere (void);
1628 extern rtx get_first_nonnote_insn (void);
1629 extern rtx get_last_nonnote_insn (void);
1630 extern void start_sequence (void);
1631 extern void push_to_sequence (rtx);
1632 extern void push_to_sequence2 (rtx, rtx);
1633 extern void end_sequence (void);
1634 extern double_int rtx_to_double_int (const_rtx);
1635 extern rtx immed_double_int_const (double_int, enum machine_mode);
1636 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1637 enum machine_mode);
1638
1639 /* In loop-iv.c */
1640
1641 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1642
1643 /* In varasm.c */
1644 extern rtx force_const_mem (enum machine_mode, rtx);
1645
1646 /* In varasm.c */
1647
1648 struct function;
1649 extern rtx get_pool_constant (rtx);
1650 extern rtx get_pool_constant_mark (rtx, bool *);
1651 extern enum machine_mode get_pool_mode (const_rtx);
1652 extern rtx simplify_subtraction (rtx);
1653
1654 /* In function.c */
1655 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1656 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1657 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1658 extern rtx assign_stack_temp_for_type (enum machine_mode,
1659 HOST_WIDE_INT, int, tree);
1660 extern rtx assign_temp (tree, int, int, int);
1661
1662 /* In emit-rtl.c */
1663 extern rtx emit_insn_before (rtx, rtx);
1664 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1665 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1666 extern rtx emit_jump_insn_before (rtx, rtx);
1667 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1668 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1669 extern rtx emit_call_insn_before (rtx, rtx);
1670 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1671 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1672 extern rtx emit_debug_insn_before (rtx, rtx);
1673 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1674 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1675 extern rtx emit_barrier_before (rtx);
1676 extern rtx emit_label_before (rtx, rtx);
1677 extern rtx emit_note_before (enum insn_note, rtx);
1678 extern rtx emit_insn_after (rtx, rtx);
1679 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1680 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1681 extern rtx emit_jump_insn_after (rtx, rtx);
1682 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1683 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1684 extern rtx emit_call_insn_after (rtx, rtx);
1685 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1686 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1687 extern rtx emit_debug_insn_after (rtx, rtx);
1688 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1689 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1690 extern rtx emit_barrier_after (rtx);
1691 extern rtx emit_label_after (rtx, rtx);
1692 extern rtx emit_note_after (enum insn_note, rtx);
1693 extern rtx emit_insn (rtx);
1694 extern rtx emit_debug_insn (rtx);
1695 extern rtx emit_jump_insn (rtx);
1696 extern rtx emit_call_insn (rtx);
1697 extern rtx emit_label (rtx);
1698 extern rtx emit_barrier (void);
1699 extern rtx emit_note (enum insn_note);
1700 extern rtx emit_note_copy (rtx);
1701 extern rtx gen_clobber (rtx);
1702 extern rtx emit_clobber (rtx);
1703 extern rtx gen_use (rtx);
1704 extern rtx emit_use (rtx);
1705 extern rtx make_insn_raw (rtx);
1706 extern rtx make_debug_insn_raw (rtx);
1707 extern rtx make_jump_insn_raw (rtx);
1708 extern void add_function_usage_to (rtx, rtx);
1709 extern rtx last_call_insn (void);
1710 extern rtx previous_insn (rtx);
1711 extern rtx next_insn (rtx);
1712 extern rtx prev_nonnote_insn (rtx);
1713 extern rtx prev_nonnote_insn_bb (rtx);
1714 extern rtx next_nonnote_insn (rtx);
1715 extern rtx next_nonnote_insn_bb (rtx);
1716 extern rtx prev_nondebug_insn (rtx);
1717 extern rtx next_nondebug_insn (rtx);
1718 extern rtx prev_real_insn (rtx);
1719 extern rtx next_real_insn (rtx);
1720 extern rtx prev_active_insn (rtx);
1721 extern rtx next_active_insn (rtx);
1722 extern int active_insn_p (const_rtx);
1723 extern rtx prev_label (rtx);
1724 extern rtx next_label (rtx);
1725 extern rtx skip_consecutive_labels (rtx);
1726 extern rtx next_cc0_user (rtx);
1727 extern rtx prev_cc0_setter (rtx);
1728
1729 /* In cfglayout.c */
1730 extern int insn_line (const_rtx);
1731 extern const char * insn_file (const_rtx);
1732 extern location_t locator_location (int);
1733 extern int locator_line (int);
1734 extern const char * locator_file (int);
1735 extern bool locator_eq (int, int);
1736 extern int prologue_locator, epilogue_locator;
1737
1738 /* In jump.c */
1739 extern enum rtx_code reverse_condition (enum rtx_code);
1740 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1741 extern enum rtx_code swap_condition (enum rtx_code);
1742 extern enum rtx_code unsigned_condition (enum rtx_code);
1743 extern enum rtx_code signed_condition (enum rtx_code);
1744 extern void mark_jump_label (rtx, rtx, int);
1745 extern unsigned int cleanup_barriers (void);
1746
1747 /* In jump.c */
1748 extern rtx delete_related_insns (rtx);
1749
1750 /* In recog.c */
1751 extern rtx *find_constant_term_loc (rtx *);
1752
1753 /* In emit-rtl.c */
1754 extern rtx try_split (rtx, rtx, int);
1755 extern int split_branch_probability;
1756
1757 /* In unknown file */
1758 extern rtx split_insns (rtx, rtx);
1759
1760 /* In simplify-rtx.c */
1761 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1762 rtx, enum machine_mode);
1763 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1764 enum machine_mode);
1765 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1766 rtx, rtx);
1767 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1768 rtx);
1769 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1770 enum machine_mode, rtx, rtx, rtx);
1771 extern rtx simplify_const_relational_operation (enum rtx_code,
1772 enum machine_mode, rtx, rtx);
1773 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1774 enum machine_mode, rtx, rtx);
1775 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1776 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1777 enum machine_mode);
1778 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1779 enum machine_mode, rtx, rtx, rtx);
1780 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1781 enum machine_mode, rtx, rtx);
1782 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1783 unsigned int);
1784 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1785 unsigned int);
1786 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1787 rtx (*fn) (rtx, const_rtx, void *), void *);
1788 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1789 extern rtx simplify_rtx (const_rtx);
1790 extern rtx avoid_constant_pool_reference (rtx);
1791 extern rtx delegitimize_mem_from_attrs (rtx);
1792 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1793
1794 /* In reginfo.c */
1795 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1796 bool);
1797
1798 /* In emit-rtl.c */
1799 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1800 extern void set_insn_deleted (rtx);
1801
1802 /* Functions in rtlanal.c */
1803
1804 /* Single set is implemented as macro for performance reasons. */
1805 #define single_set(I) (INSN_P (I) \
1806 ? (GET_CODE (PATTERN (I)) == SET \
1807 ? PATTERN (I) : single_set_1 (I)) \
1808 : NULL_RTX)
1809 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1810
1811 /* Structure used for passing data to REPLACE_LABEL. */
1812 typedef struct replace_label_data
1813 {
1814 rtx r1;
1815 rtx r2;
1816 bool update_label_nuses;
1817 } replace_label_data;
1818
1819 extern int rtx_addr_can_trap_p (const_rtx);
1820 extern bool nonzero_address_p (const_rtx);
1821 extern int rtx_unstable_p (const_rtx);
1822 extern bool rtx_varies_p (const_rtx, bool);
1823 extern bool rtx_addr_varies_p (const_rtx, bool);
1824 extern HOST_WIDE_INT get_integer_term (const_rtx);
1825 extern rtx get_related_value (const_rtx);
1826 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1827 extern void split_const (rtx, rtx *, rtx *);
1828 extern int reg_mentioned_p (const_rtx, const_rtx);
1829 extern int count_occurrences (const_rtx, const_rtx, int);
1830 extern int reg_referenced_p (const_rtx, const_rtx);
1831 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1832 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1833 extern int commutative_operand_precedence (rtx);
1834 extern bool swap_commutative_operands_p (rtx, rtx);
1835 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1836 extern int no_labels_between_p (const_rtx, const_rtx);
1837 extern int modified_in_p (const_rtx, const_rtx);
1838 extern int reg_set_p (const_rtx, const_rtx);
1839 extern rtx single_set_2 (const_rtx, const_rtx);
1840 extern int multiple_sets (const_rtx);
1841 extern int set_noop_p (const_rtx);
1842 extern int noop_move_p (const_rtx);
1843 extern rtx find_last_value (rtx, rtx *, rtx, int);
1844 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1845 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1846 extern const_rtx set_of (const_rtx, const_rtx);
1847 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1848 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1849 extern int dead_or_set_p (const_rtx, const_rtx);
1850 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1851 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1852 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1853 extern rtx find_reg_equal_equiv_note (const_rtx);
1854 extern rtx find_constant_src (const_rtx);
1855 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1856 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1857 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1858 extern void add_reg_note (rtx, enum reg_note, rtx);
1859 extern void remove_note (rtx, const_rtx);
1860 extern void remove_reg_equal_equiv_notes (rtx);
1861 extern int side_effects_p (const_rtx);
1862 extern int volatile_refs_p (const_rtx);
1863 extern int volatile_insn_p (const_rtx);
1864 extern int may_trap_p_1 (const_rtx, unsigned);
1865 extern int may_trap_p (const_rtx);
1866 extern int may_trap_or_fault_p (const_rtx);
1867 extern bool can_throw_internal (const_rtx);
1868 extern bool can_throw_external (const_rtx);
1869 extern bool insn_could_throw_p (const_rtx);
1870 extern bool insn_nothrow_p (const_rtx);
1871 extern bool can_nonlocal_goto (const_rtx);
1872 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1873 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1874 extern int inequality_comparisons_p (const_rtx);
1875 extern rtx replace_rtx (rtx, rtx, rtx);
1876 extern int replace_label (rtx *, void *);
1877 extern int rtx_referenced_p (rtx, rtx);
1878 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1879 extern int computed_jump_p (const_rtx);
1880
1881 typedef int (*rtx_function) (rtx *, void *);
1882 extern int for_each_rtx (rtx *, rtx_function, void *);
1883
1884 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1885 rtx *, rtx *);
1886 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1887 rtx_equal_p_callback_function);
1888
1889 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1890 enum machine_mode *);
1891 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1892 bool, hash_rtx_callback_function);
1893
1894 extern rtx regno_use_in (unsigned int, rtx);
1895 extern int auto_inc_p (const_rtx);
1896 extern int in_expr_list_p (const_rtx, const_rtx);
1897 extern void remove_node_from_expr_list (const_rtx, rtx *);
1898 extern int loc_mentioned_in_p (rtx *, const_rtx);
1899 extern rtx find_first_parameter_load (rtx, rtx);
1900 extern bool keep_with_call_p (const_rtx);
1901 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1902 extern int insn_rtx_cost (rtx, bool);
1903
1904 /* Given an insn and condition, return a canonical description of
1905 the test being made. */
1906 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1907
1908 /* Given a JUMP_INSN, return a canonical description of the test
1909 being made. */
1910 extern rtx get_condition (rtx, rtx *, int, int);
1911
1912 /* Information about a subreg of a hard register. */
1913 struct subreg_info
1914 {
1915 /* Offset of first hard register involved in the subreg. */
1916 int offset;
1917 /* Number of hard registers involved in the subreg. */
1918 int nregs;
1919 /* Whether this subreg can be represented as a hard reg with the new
1920 mode. */
1921 bool representable_p;
1922 };
1923
1924 extern void subreg_get_info (unsigned int, enum machine_mode,
1925 unsigned int, enum machine_mode,
1926 struct subreg_info *);
1927
1928 /* lists.c */
1929
1930 extern void free_EXPR_LIST_list (rtx *);
1931 extern void free_INSN_LIST_list (rtx *);
1932 extern void free_EXPR_LIST_node (rtx);
1933 extern void free_INSN_LIST_node (rtx);
1934 extern rtx alloc_INSN_LIST (rtx, rtx);
1935 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1936 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1937 extern rtx remove_list_elem (rtx, rtx *);
1938 extern rtx remove_free_INSN_LIST_node (rtx *);
1939 extern rtx remove_free_EXPR_LIST_node (rtx *);
1940
1941
1942 /* reginfo.c */
1943
1944 /* Initialize may_move_cost and friends for mode M. */
1945 extern void init_move_cost (enum machine_mode);
1946 /* Resize reg info. */
1947 extern bool resize_reg_info (void);
1948 /* Free up register info memory. */
1949 extern void free_reg_info (void);
1950 extern void init_subregs_of_mode (void);
1951 extern void finish_subregs_of_mode (void);
1952
1953 /* recog.c */
1954 extern rtx extract_asm_operands (rtx);
1955 extern int asm_noperands (const_rtx);
1956 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1957 enum machine_mode *, location_t *);
1958
1959 extern enum reg_class reg_preferred_class (int);
1960 extern enum reg_class reg_alternate_class (int);
1961 extern enum reg_class reg_cover_class (int);
1962 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1963 enum reg_class);
1964
1965 extern void split_all_insns (void);
1966 extern unsigned int split_all_insns_noflow (void);
1967
1968 #define MAX_SAVED_CONST_INT 64
1969 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1970
1971 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1972 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1973 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1974 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1975 extern GTY(()) rtx const_true_rtx;
1976
1977 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1978
1979 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1980 same as VOIDmode. */
1981
1982 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1983
1984 /* Likewise, for the constants 1 and 2. */
1985
1986 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1987 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1988
1989 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1990 is used to represent the frame pointer. This is because the
1991 hard frame pointer and the automatic variables are separated by an amount
1992 that cannot be determined until after register allocation. We can assume
1993 that in this case ELIMINABLE_REGS will be defined, one action of which
1994 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1995 #ifndef HARD_FRAME_POINTER_REGNUM
1996 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1997 #endif
1998
1999 /* Index labels for global_rtl. */
2000 enum global_rtl_index
2001 {
2002 GR_PC,
2003 GR_CC0,
2004 GR_STACK_POINTER,
2005 GR_FRAME_POINTER,
2006 /* For register elimination to work properly these hard_frame_pointer_rtx,
2007 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2008 the same register. */
2009 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2010 GR_ARG_POINTER = GR_FRAME_POINTER,
2011 #endif
2012 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
2013 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2014 #else
2015 GR_HARD_FRAME_POINTER,
2016 #endif
2017 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2018 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2019 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2020 #else
2021 GR_ARG_POINTER,
2022 #endif
2023 #endif
2024 GR_VIRTUAL_INCOMING_ARGS,
2025 GR_VIRTUAL_STACK_ARGS,
2026 GR_VIRTUAL_STACK_DYNAMIC,
2027 GR_VIRTUAL_OUTGOING_ARGS,
2028 GR_VIRTUAL_CFA,
2029
2030 GR_MAX
2031 };
2032
2033 /* Pointers to standard pieces of rtx are stored here. */
2034 extern GTY(()) rtx global_rtl[GR_MAX];
2035
2036 /* Standard pieces of rtx, to be substituted directly into things. */
2037 #define pc_rtx (global_rtl[GR_PC])
2038 #define cc0_rtx (global_rtl[GR_CC0])
2039
2040 /* All references to certain hard regs, except those created
2041 by allocating pseudo regs into them (when that's possible),
2042 go through these unique rtx objects. */
2043 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2044 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2045 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2046 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2047
2048 extern GTY(()) rtx pic_offset_table_rtx;
2049 extern GTY(()) rtx return_address_pointer_rtx;
2050
2051 /* Include the RTL generation functions. */
2052
2053 #ifndef GENERATOR_FILE
2054 #include "genrtl.h"
2055 #undef gen_rtx_ASM_INPUT
2056 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2057 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2058 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2059 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2060 #endif
2061
2062 /* There are some RTL codes that require special attention; the
2063 generation functions included above do the raw handling. If you
2064 add to this list, modify special_rtx in gengenrtl.c as well. */
2065
2066 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2067 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2068 extern rtx gen_raw_REG (enum machine_mode, int);
2069 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2070 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2071 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2072
2073 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2074
2075 /* Virtual registers are used during RTL generation to refer to locations into
2076 the stack frame when the actual location isn't known until RTL generation
2077 is complete. The routine instantiate_virtual_regs replaces these with
2078 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2079 a constant. */
2080
2081 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2082
2083 /* This points to the first word of the incoming arguments passed on the stack,
2084 either by the caller or by the callee when pretending it was passed by the
2085 caller. */
2086
2087 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2088
2089 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2090
2091 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2092 variable on the stack. Otherwise, it points to the first variable on
2093 the stack. */
2094
2095 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2096
2097 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2098
2099 /* This points to the location of dynamically-allocated memory on the stack
2100 immediately after the stack pointer has been adjusted by the amount
2101 desired. */
2102
2103 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2104
2105 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2106
2107 /* This points to the location in the stack at which outgoing arguments should
2108 be written when the stack is pre-pushed (arguments pushed using push
2109 insns always use sp). */
2110
2111 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2112
2113 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2114
2115 /* This points to the Canonical Frame Address of the function. This
2116 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2117 but is calculated relative to the arg pointer for simplicity; the
2118 frame pointer nor stack pointer are necessarily fixed relative to
2119 the CFA until after reload. */
2120
2121 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2122
2123 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2124
2125 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2126
2127 /* Nonzero if REGNUM is a pointer into the stack frame. */
2128 #define REGNO_PTR_FRAME_P(REGNUM) \
2129 ((REGNUM) == STACK_POINTER_REGNUM \
2130 || (REGNUM) == FRAME_POINTER_REGNUM \
2131 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2132 || (REGNUM) == ARG_POINTER_REGNUM \
2133 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2134 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2135
2136 /* REGNUM never really appearing in the INSN stream. */
2137 #define INVALID_REGNUM (~(unsigned int) 0)
2138
2139 extern rtx output_constant_def (tree, int);
2140 extern rtx lookup_constant_def (tree);
2141
2142 /* Nonzero after end of reload pass.
2143 Set to 1 or 0 by reload1.c. */
2144
2145 extern int reload_completed;
2146
2147 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2148 extern int epilogue_completed;
2149
2150 /* Set to 1 while reload_as_needed is operating.
2151 Required by some machines to handle any generated moves differently. */
2152
2153 extern int reload_in_progress;
2154
2155 /* This macro indicates whether you may create a new
2156 pseudo-register. */
2157
2158 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2159
2160 #ifdef STACK_REGS
2161 /* Nonzero after end of regstack pass.
2162 Set to 1 or 0 by reg-stack.c. */
2163 extern int regstack_completed;
2164 #endif
2165
2166 /* If this is nonzero, we do not bother generating VOLATILE
2167 around volatile memory references, and we are willing to
2168 output indirect addresses. If cse is to follow, we reject
2169 indirect addresses so a useful potential cse is generated;
2170 if it is used only once, instruction combination will produce
2171 the same indirect address eventually. */
2172 extern int cse_not_expected;
2173
2174 /* Translates rtx code to tree code, for those codes needed by
2175 REAL_ARITHMETIC. The function returns an int because the caller may not
2176 know what `enum tree_code' means. */
2177
2178 extern int rtx_to_tree_code (enum rtx_code);
2179
2180 /* In cse.c */
2181 extern int delete_trivially_dead_insns (rtx, int);
2182 extern int cse_main (rtx, int);
2183 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2184 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2185
2186 /* In jump.c */
2187 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2188 extern int condjump_p (const_rtx);
2189 extern int any_condjump_p (const_rtx);
2190 extern int any_uncondjump_p (const_rtx);
2191 extern rtx pc_set (const_rtx);
2192 extern rtx condjump_label (const_rtx);
2193 extern int simplejump_p (const_rtx);
2194 extern int returnjump_p (rtx);
2195 extern int eh_returnjump_p (rtx);
2196 extern int onlyjump_p (const_rtx);
2197 extern int only_sets_cc0_p (const_rtx);
2198 extern int sets_cc0_p (const_rtx);
2199 extern int invert_jump_1 (rtx, rtx);
2200 extern int invert_jump (rtx, rtx, int);
2201 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2202 extern int true_regnum (const_rtx);
2203 extern unsigned int reg_or_subregno (const_rtx);
2204 extern int redirect_jump_1 (rtx, rtx);
2205 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2206 extern int redirect_jump (rtx, rtx, int);
2207 extern void rebuild_jump_labels (rtx);
2208 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2209 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2210 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2211 const_rtx, const_rtx);
2212 extern void delete_for_peephole (rtx, rtx);
2213 extern int condjump_in_parallel_p (const_rtx);
2214
2215 /* In emit-rtl.c. */
2216 extern int max_reg_num (void);
2217 extern int max_label_num (void);
2218 extern int get_first_label_num (void);
2219 extern void maybe_set_first_label_num (rtx);
2220 extern void delete_insns_since (rtx);
2221 extern void mark_reg_pointer (rtx, int);
2222 extern void mark_user_reg (rtx);
2223 extern void reset_used_flags (rtx);
2224 extern void set_used_flags (rtx);
2225 extern void reorder_insns (rtx, rtx, rtx);
2226 extern void reorder_insns_nobb (rtx, rtx, rtx);
2227 extern int get_max_uid (void);
2228 extern int get_max_insn_count (void);
2229 extern int in_sequence_p (void);
2230 extern void force_next_line_note (void);
2231 extern void init_emit (void);
2232 extern void init_emit_regs (void);
2233 extern void init_emit_once (void);
2234 extern void push_topmost_sequence (void);
2235 extern void pop_topmost_sequence (void);
2236 extern void set_new_first_and_last_insn (rtx, rtx);
2237 extern unsigned int unshare_all_rtl (void);
2238 extern void unshare_all_rtl_again (rtx);
2239 extern void unshare_all_rtl_in_chain (rtx);
2240 extern void verify_rtl_sharing (void);
2241 extern void set_first_insn (rtx);
2242 extern void set_last_insn (rtx);
2243 extern void link_cc0_insns (rtx);
2244 extern void add_insn (rtx);
2245 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2246 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2247 extern void remove_insn (rtx);
2248 extern rtx emit (rtx);
2249 extern rtx delete_insn (rtx);
2250 extern rtx entry_of_function (void);
2251 extern void emit_insn_at_entry (rtx);
2252 extern void delete_insn_chain (rtx, rtx, bool);
2253 extern rtx unlink_insn_chain (rtx, rtx);
2254 extern rtx delete_insn_and_edges (rtx);
2255 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2256 extern rtx gen_const_mem (enum machine_mode, rtx);
2257 extern rtx gen_frame_mem (enum machine_mode, rtx);
2258 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2259 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2260 const_rtx, unsigned int);
2261
2262 /* In combine.c */
2263 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2264 extern rtx remove_death (unsigned int, rtx);
2265 extern void dump_combine_stats (FILE *);
2266 extern void dump_combine_total_stats (FILE *);
2267
2268 /* In cfgcleanup.c */
2269 extern void delete_dead_jumptables (void);
2270
2271 /* In sched-vis.c. */
2272 extern void debug_bb_n_slim (int);
2273 extern void debug_bb_slim (struct basic_block_def *);
2274 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2275 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2276 extern void dump_insn_slim (FILE *f, rtx x);
2277 extern void debug_insn_slim (rtx x);
2278
2279 /* In sched-rgn.c. */
2280 extern void schedule_insns (void);
2281
2282 /* In sched-ebb.c. */
2283 extern void schedule_ebbs (void);
2284
2285 /* In haifa-sched.c. */
2286 extern void fix_sched_param (const char *, const char *);
2287
2288 /* In sel-sched-dump.c. */
2289 extern void sel_sched_fix_param (const char *param, const char *val);
2290
2291 /* In print-rtl.c */
2292 extern const char *print_rtx_head;
2293 extern void debug_rtx (const_rtx);
2294 extern void debug_rtx_list (const_rtx, int);
2295 extern void debug_rtx_range (const_rtx, const_rtx);
2296 extern const_rtx debug_rtx_find (const_rtx, int);
2297 extern void print_mem_expr (FILE *, const_tree);
2298 extern void print_rtl (FILE *, const_rtx);
2299 extern void print_simple_rtl (FILE *, const_rtx);
2300 extern int print_rtl_single (FILE *, const_rtx);
2301 extern void print_inline_rtx (FILE *, const_rtx, int);
2302
2303 /* In function.c */
2304 extern void reposition_prologue_and_epilogue_notes (void);
2305 extern int prologue_epilogue_contains (const_rtx);
2306 extern int sibcall_epilogue_contains (const_rtx);
2307 extern void mark_temp_addr_taken (rtx);
2308 extern void update_temp_slot_address (rtx, rtx);
2309 extern void maybe_copy_epilogue_insn (rtx, rtx);
2310
2311 /* In stmt.c */
2312 extern void expand_null_return (void);
2313 extern void expand_naked_return (void);
2314 extern void emit_jump (rtx);
2315
2316 /* In expr.c */
2317 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2318 unsigned int, int);
2319
2320 /* In cfgrtl.c */
2321 extern void print_rtl_with_bb (FILE *, const_rtx);
2322
2323 /* In cfg.c. */
2324 extern void dump_reg_info (FILE *);
2325 extern void dump_flow_info (FILE *, int);
2326
2327 /* In expmed.c */
2328 extern void init_expmed (void);
2329 extern void expand_inc (rtx, rtx);
2330 extern void expand_dec (rtx, rtx);
2331
2332 /* In gcse.c */
2333 extern bool can_copy_p (enum machine_mode);
2334 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2335 extern rtx fis_get_condition (rtx);
2336
2337 /* In ira.c */
2338 #ifdef HARD_CONST
2339 extern HARD_REG_SET eliminable_regset;
2340 #endif
2341 extern void mark_elimination (int, int);
2342
2343 /* In reginfo.c */
2344 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2345 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2346 extern void globalize_reg (int);
2347 extern void init_reg_modes_target (void);
2348 extern void init_regs (void);
2349 extern void reinit_regs (void);
2350 extern void init_fake_stack_mems (void);
2351 extern void save_register_info (void);
2352 extern void init_reg_sets (void);
2353 extern void regclass (rtx, int);
2354 extern void reg_scan (rtx, unsigned int);
2355 extern void fix_register (const char *, int, int);
2356 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2357 enum machine_mode);
2358
2359 /* In reorg.c */
2360 extern void dbr_schedule (rtx);
2361
2362 /* In reload1.c */
2363 extern int function_invariant_p (const_rtx);
2364
2365 /* In calls.c */
2366 enum libcall_type
2367 {
2368 LCT_NORMAL = 0,
2369 LCT_CONST = 1,
2370 LCT_PURE = 2,
2371 LCT_NORETURN = 3,
2372 LCT_THROW = 4,
2373 LCT_RETURNS_TWICE = 5
2374 };
2375
2376 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2377 ...);
2378 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2379 enum machine_mode, int, ...);
2380
2381 /* In varasm.c */
2382 extern void init_varasm_once (void);
2383 extern enum tls_model decl_default_tls_model (const_tree);
2384
2385 extern rtx make_debug_expr_from_rtl (const_rtx);
2386
2387 /* In rtl.c */
2388 extern void traverse_md_constants (int (*) (void **, void *), void *);
2389 struct md_constant { char *name, *value; };
2390
2391 /* In read-rtl.c */
2392 extern int read_skip_spaces (FILE *);
2393 extern bool read_rtx (FILE *, rtx *, int *);
2394 extern void copy_rtx_ptr_loc (const void *, const void *);
2395 extern void print_rtx_ptr_loc (const void *);
2396 extern const char *join_c_conditions (const char *, const char *);
2397 extern void print_c_condition (const char *);
2398 extern const char *read_rtx_filename;
2399 extern int read_rtx_lineno;
2400
2401 /* In alias.c */
2402 extern rtx canon_rtx (rtx);
2403 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2404 extern rtx get_addr (rtx);
2405 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2406 rtx, bool (*)(const_rtx, bool));
2407 extern int read_dependence (const_rtx, const_rtx);
2408 extern int anti_dependence (const_rtx, const_rtx);
2409 extern int output_dependence (const_rtx, const_rtx);
2410 extern void init_alias_target (void);
2411 extern void init_alias_analysis (void);
2412 extern void end_alias_analysis (void);
2413 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2414 extern rtx find_base_term (rtx);
2415 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2416 extern rtx get_reg_known_value (unsigned int);
2417 extern bool get_reg_known_equiv_p (unsigned int);
2418
2419 #ifdef STACK_REGS
2420 extern int stack_regs_mentioned (const_rtx insn);
2421 #endif
2422
2423 /* In toplev.c */
2424 extern GTY(()) rtx stack_limit_rtx;
2425
2426 /* In predict.c */
2427 extern void invert_br_probabilities (rtx);
2428 extern bool expensive_function_p (int);
2429
2430 /* In var-tracking.c */
2431 extern unsigned int variable_tracking_main (void);
2432
2433 /* In stor-layout.c. */
2434 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2435 rtx *, rtx *);
2436
2437 /* In loop-unswitch.c */
2438 extern rtx reversed_condition (rtx);
2439 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2440
2441 /* In loop-iv.c */
2442 extern rtx canon_condition (rtx);
2443 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2444
2445 /* In final.c */
2446 extern unsigned int compute_alignments (void);
2447 extern int asm_str_count (const char *templ);
2448 \f
2449 struct rtl_hooks
2450 {
2451 rtx (*gen_lowpart) (enum machine_mode, rtx);
2452 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2453 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2454 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2455 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2456 unsigned int, unsigned int *);
2457 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2458
2459 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2460 };
2461
2462 /* Each pass can provide its own. */
2463 extern struct rtl_hooks rtl_hooks;
2464
2465 /* ... but then it has to restore these. */
2466 extern const struct rtl_hooks general_rtl_hooks;
2467
2468 /* Keep this for the nonce. */
2469 #define gen_lowpart rtl_hooks.gen_lowpart
2470
2471 extern void insn_locators_alloc (void);
2472 extern void insn_locators_free (void);
2473 extern void insn_locators_finalize (void);
2474 extern void set_curr_insn_source_location (location_t);
2475 extern location_t get_curr_insn_source_location (void);
2476 extern void set_curr_insn_block (tree);
2477 extern tree get_curr_insn_block (void);
2478 extern int curr_insn_locator (void);
2479 extern bool optimize_insn_for_size_p (void);
2480 extern bool optimize_insn_for_speed_p (void);
2481
2482 #endif /* ! GCC_RTL_H */