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2009-10-01 Tobias Burnus <burnus@net-b.de>
[official-gcc/alias-decl.git] / gcc / rtl.h
blobd415ba483f3cc22fdb2e19adb2a3c92f2dec8e2f
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 #include "statistics.h"
26 #include "machmode.h"
27 #include "input.h"
28 #include "real.h"
29 #include "vec.h"
30 #include "fixed-value.h"
31 #include "alias.h"
32
33 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
34 #undef FLOAT /* Likewise. */
35 #undef ABS /* Likewise. */
36 #undef PC /* Likewise. */
37
38 /* Value used by some passes to "recognize" noop moves as valid
39 instructions. */
40 #define NOOP_MOVE_INSN_CODE INT_MAX
41
42 /* Register Transfer Language EXPRESSIONS CODES */
43
44 #define RTX_CODE enum rtx_code
45 enum rtx_code {
46
47 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
48 #include "rtl.def" /* rtl expressions are documented here */
49 #undef DEF_RTL_EXPR
50
51 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
52 NUM_RTX_CODE.
53 Assumes default enum value assignment. */
54
55 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
56 /* The cast here, saves many elsewhere. */
57
58 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59
60 enum rtx_class {
61 /* We check bit 0-1 of some rtx class codes in the predicates below. */
62
63 /* Bit 0 = comparison if 0, arithmetic is 1
64 Bit 1 = 1 if commutative. */
65 RTX_COMPARE, /* 0 */
66 RTX_COMM_COMPARE,
67 RTX_BIN_ARITH,
68 RTX_COMM_ARITH,
69
70 /* Must follow the four preceding values. */
71 RTX_UNARY, /* 4 */
72
73 RTX_EXTRA,
74 RTX_MATCH,
75 RTX_INSN,
76
77 /* Bit 0 = 1 if constant. */
78 RTX_OBJ, /* 8 */
79 RTX_CONST_OBJ,
80
81 RTX_TERNARY,
82 RTX_BITFIELD_OPS,
83 RTX_AUTOINC
84 };
85
86 #define RTX_OBJ_MASK (~1)
87 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
88 #define RTX_COMPARE_MASK (~1)
89 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
90 #define RTX_ARITHMETIC_MASK (~1)
91 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
92 #define RTX_BINARY_MASK (~3)
93 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
94 #define RTX_COMMUTATIVE_MASK (~2)
95 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
96 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
97
98 extern const unsigned char rtx_length[NUM_RTX_CODE];
99 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
100
101 extern const char * const rtx_name[NUM_RTX_CODE];
102 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
103
104 extern const char * const rtx_format[NUM_RTX_CODE];
105 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
106
107 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
108 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
109
110 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
111 extern const unsigned char rtx_next[NUM_RTX_CODE];
112 \f
113 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
114 relative to which the offsets are calculated, as explained in rtl.def. */
115 typedef struct
116 {
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align: 8;
119 /* Flags: */
120 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
121 unsigned min_after_vec: 1; /* minimum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned max_after_vec: 1; /* maximum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned min_after_base: 1; /* minimum address target label is
126 after BASE. */
127 unsigned max_after_base: 1; /* maximum address target label is
128 after BASE. */
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
131 unsigned : 2;
132 unsigned scale : 8;
133 } addr_diff_vec_flags;
134
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. If any element is nonzero, it means
138 the value of the corresponding attribute is unknown. */
139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
140 while EXPR can describe a larger underlying object, which might have a
141 stricter alignment; OFFSET is the offset of the MEM within that object. */
142 typedef struct GTY(()) mem_attrs
143 {
144 tree expr; /* expr corresponding to MEM. */
145 rtx offset; /* Offset from start of DECL, as CONST_INT. */
146 rtx size; /* Size in bytes, as a CONST_INT. */
147 alias_set_type alias; /* Memory alias set. */
148 unsigned int align; /* Alignment of MEM in bits. */
149 } mem_attrs;
150
151 /* Structure used to describe the attributes of a REG in similar way as
152 mem_attrs does for MEM above. Note that the OFFSET field is calculated
153 in the same way as for mem_attrs, rather than in the same way as a
154 SUBREG_BYTE. For example, if a big-endian target stores a byte
155 object in the low part of a 4-byte register, the OFFSET field
156 will be -3 rather than 0. */
157
158 typedef struct GTY(()) reg_attrs {
159 tree decl; /* decl corresponding to REG. */
160 HOST_WIDE_INT offset; /* Offset from start of DECL. */
161 } reg_attrs;
162
163 /* Common union for an element of an rtx. */
164
165 union rtunion_def
166 {
167 int rt_int;
168 unsigned int rt_uint;
169 const char *rt_str;
170 rtx rt_rtx;
171 rtvec rt_rtvec;
172 enum machine_mode rt_type;
173 addr_diff_vec_flags rt_addr_diff_vec_flags;
174 struct cselib_val_struct *rt_cselib;
175 struct bitmap_head_def *rt_bit;
176 tree rt_tree;
177 struct basic_block_def *rt_bb;
178 mem_attrs *rt_mem;
179 reg_attrs *rt_reg;
180 struct constant_descriptor_rtx *rt_constant;
181 };
182 typedef union rtunion_def rtunion;
183
184 /* This structure remembers the position of a SYMBOL_REF within an
185 object_block structure. A SYMBOL_REF only provides this information
186 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
187 struct GTY(()) block_symbol {
188 /* The usual SYMBOL_REF fields. */
189 rtunion GTY ((skip)) fld[3];
190
191 /* The block that contains this object. */
192 struct object_block *block;
193
194 /* The offset of this object from the start of its block. It is negative
195 if the symbol has not yet been assigned an offset. */
196 HOST_WIDE_INT offset;
197 };
198
199 DEF_VEC_P(rtx);
200 DEF_VEC_ALLOC_P(rtx,heap);
201 DEF_VEC_ALLOC_P(rtx,gc);
202
203 /* Describes a group of objects that are to be placed together in such
204 a way that their relative positions are known. */
205 struct GTY(()) object_block {
206 /* The section in which these objects should be placed. */
207 section *sect;
208
209 /* The alignment of the first object, measured in bits. */
210 unsigned int alignment;
211
212 /* The total size of the objects, measured in bytes. */
213 HOST_WIDE_INT size;
214
215 /* The SYMBOL_REFs for each object. The vector is sorted in
216 order of increasing offset and the following conditions will
217 hold for each element X:
218
219 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
220 !SYMBOL_REF_ANCHOR_P (X)
221 SYMBOL_REF_BLOCK (X) == [address of this structure]
222 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
223 VEC(rtx,gc) *objects;
224
225 /* All the anchor SYMBOL_REFs used to address these objects, sorted
226 in order of increasing offset, and then increasing TLS model.
227 The following conditions will hold for each element X in this vector:
228
229 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
230 SYMBOL_REF_ANCHOR_P (X)
231 SYMBOL_REF_BLOCK (X) == [address of this structure]
232 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
233 VEC(rtx,gc) *anchors;
234 };
235
236 /* RTL expression ("rtx"). */
237
238 struct GTY((chain_next ("RTX_NEXT (&%h)"),
239 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
240 /* The kind of expression this is. */
241 ENUM_BITFIELD(rtx_code) code: 16;
242
243 /* The kind of value the expression has. */
244 ENUM_BITFIELD(machine_mode) mode : 8;
245
246 /* 1 in a MEM if we should keep the alias set for this mem unchanged
247 when we access a component.
248 1 in a CALL_INSN if it is a sibling call.
249 1 in a SET that is for a return.
250 In a CODE_LABEL, part of the two-bit alternate entry field. */
251 unsigned int jump : 1;
252 /* In a CODE_LABEL, part of the two-bit alternate entry field.
253 1 in a MEM if it cannot trap.
254 1 in a CALL_INSN logically equivalent to
255 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
256 unsigned int call : 1;
257 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
258 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
259 1 in a SYMBOL_REF if it addresses something in the per-function
260 constants pool.
261 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
262 1 in a NOTE, or EXPR_LIST for a const call.
263 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
264 unsigned int unchanging : 1;
265 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
266 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
267 if it has been deleted.
268 1 in a REG expression if corresponds to a variable declared by the user,
269 0 for an internally generated temporary.
270 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
271 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
272 non-local label.
273 In a SYMBOL_REF, this flag is used for machine-specific purposes.
274 In a PREFETCH, this flag indicates that it should be considered a scheduling
275 barrier. */
276 unsigned int volatil : 1;
277 /* 1 in a MEM referring to a field of an aggregate.
278 0 if the MEM was a variable or the result of a * operator in C;
279 1 if it was the result of a . or -> operator (on a struct) in C.
280 1 in a REG if the register is used only in exit code a loop.
281 1 in a SUBREG expression if was generated from a variable with a
282 promoted mode.
283 1 in a CODE_LABEL if the label is used for nonlocal gotos
284 and must not be deleted even if its count is zero.
285 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
286 together with the preceding insn. Valid only within sched.
287 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
288 from the target of a branch. Valid from reorg until end of compilation;
289 cleared before used. */
290 unsigned int in_struct : 1;
291 /* At the end of RTL generation, 1 if this rtx is used. This is used for
292 copying shared structure. See `unshare_all_rtl'.
293 In a REG, this is not needed for that purpose, and used instead
294 in `leaf_renumber_regs_insn'.
295 1 in a SYMBOL_REF, means that emit_library_call
296 has used it as the function. */
297 unsigned int used : 1;
298 /* 1 in an INSN or a SET if this rtx is related to the call frame,
299 either changing how we compute the frame address or saving and
300 restoring registers in the prologue and epilogue.
301 1 in a REG or MEM if it is a pointer.
302 1 in a SYMBOL_REF if it addresses something in the per-function
303 constant string pool. */
304 unsigned frame_related : 1;
305 /* 1 in a REG or PARALLEL that is the current function's return value.
306 1 in a MEM if it refers to a scalar.
307 1 in a SYMBOL_REF for a weak symbol.
308 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
309 unsigned return_val : 1;
310
311 /* The first element of the operands of this rtx.
312 The number of operands and their types are controlled
313 by the `code' field, according to rtl.def. */
314 union u {
315 rtunion fld[1];
316 HOST_WIDE_INT hwint[1];
317 struct block_symbol block_sym;
318 struct real_value rv;
319 struct fixed_value fv;
320 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
321 };
322
323 /* The size in bytes of an rtx header (code, mode and flags). */
324 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
325
326 /* The size in bytes of an rtx with code CODE. */
327 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
328
329 #define NULL_RTX (rtx) 0
330
331 /* The "next" and "previous" RTX, relative to this one. */
332
333 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
334 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
335
336 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
337 */
338 #define RTX_PREV(X) ((INSN_P (X) \
339 || NOTE_P (X) \
340 || BARRIER_P (X) \
341 || LABEL_P (X)) \
342 && PREV_INSN (X) != NULL \
343 && NEXT_INSN (PREV_INSN (X)) == X \
344 ? PREV_INSN (X) : NULL)
345
346 /* Define macros to access the `code' field of the rtx. */
347
348 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
349 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
350
351 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
352 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
353
354 /* RTL vector. These appear inside RTX's when there is a need
355 for a variable number of things. The principle use is inside
356 PARALLEL expressions. */
357
358 struct GTY(()) rtvec_def {
359 int num_elem; /* number of elements */
360 rtx GTY ((length ("%h.num_elem"))) elem[1];
361 };
362
363 #define NULL_RTVEC (rtvec) 0
364
365 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
366 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
367
368 /* Predicate yielding nonzero iff X is an rtx for a register. */
369 #define REG_P(X) (GET_CODE (X) == REG)
370
371 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
372 #define MEM_P(X) (GET_CODE (X) == MEM)
373
374 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
375 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
376
377 /* Predicate yielding nonzero iff X is a label insn. */
378 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
379
380 /* Predicate yielding nonzero iff X is a jump insn. */
381 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
382
383 /* Predicate yielding nonzero iff X is a call insn. */
384 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
385
386 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
387 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
388
389 /* Predicate yielding nonzero iff X is a debug note/insn. */
390 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
391
392 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
393 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
394
395 /* Nonzero if DEBUG_INSN_P may possibly hold. */
396 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
397
398 /* Predicate yielding nonzero iff X is a real insn. */
399 #define INSN_P(X) \
400 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
401
402 /* Predicate yielding nonzero iff X is a note insn. */
403 #define NOTE_P(X) (GET_CODE (X) == NOTE)
404
405 /* Predicate yielding nonzero iff X is a barrier insn. */
406 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
407
408 /* Predicate yielding nonzero iff X is a data for a jump table. */
409 #define JUMP_TABLE_DATA_P(INSN) \
410 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
411 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
412
413 /* 1 if X is a unary operator. */
414
415 #define UNARY_P(X) \
416 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
417
418 /* 1 if X is a binary operator. */
419
420 #define BINARY_P(X) \
421 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
422
423 /* 1 if X is an arithmetic operator. */
424
425 #define ARITHMETIC_P(X) \
426 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
427 == RTX_ARITHMETIC_RESULT)
428
429 /* 1 if X is an arithmetic operator. */
430
431 #define COMMUTATIVE_ARITH_P(X) \
432 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
433
434 /* 1 if X is a commutative arithmetic operator or a comparison operator.
435 These two are sometimes selected together because it is possible to
436 swap the two operands. */
437
438 #define SWAPPABLE_OPERANDS_P(X) \
439 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
440 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
441 | (1 << RTX_COMPARE)))
442
443 /* 1 if X is a non-commutative operator. */
444
445 #define NON_COMMUTATIVE_P(X) \
446 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
447 == RTX_NON_COMMUTATIVE_RESULT)
448
449 /* 1 if X is a commutative operator on integers. */
450
451 #define COMMUTATIVE_P(X) \
452 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
453 == RTX_COMMUTATIVE_RESULT)
454
455 /* 1 if X is a relational operator. */
456
457 #define COMPARISON_P(X) \
458 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
459
460 /* 1 if X is a constant value that is an integer. */
461
462 #define CONSTANT_P(X) \
463 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
464
465 /* 1 if X can be used to represent an object. */
466 #define OBJECT_P(X) \
467 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
468
469 /* General accessor macros for accessing the fields of an rtx. */
470
471 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
472 /* The bit with a star outside the statement expr and an & inside is
473 so that N can be evaluated only once. */
474 #define RTL_CHECK1(RTX, N, C1) __extension__ \
475 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
476 const enum rtx_code _code = GET_CODE (_rtx); \
477 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
478 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
479 __FUNCTION__); \
480 if (GET_RTX_FORMAT(_code)[_n] != C1) \
481 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
482 __FUNCTION__); \
483 &_rtx->u.fld[_n]; }))
484
485 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
486 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
487 const enum rtx_code _code = GET_CODE (_rtx); \
488 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
489 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
490 __FUNCTION__); \
491 if (GET_RTX_FORMAT(_code)[_n] != C1 \
492 && GET_RTX_FORMAT(_code)[_n] != C2) \
493 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
494 __FUNCTION__); \
495 &_rtx->u.fld[_n]; }))
496
497 #define RTL_CHECKC1(RTX, N, C) __extension__ \
498 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
499 if (GET_CODE (_rtx) != (C)) \
500 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
501 __FUNCTION__); \
502 &_rtx->u.fld[_n]; }))
503
504 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
505 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
506 const enum rtx_code _code = GET_CODE (_rtx); \
507 if (_code != (C1) && _code != (C2)) \
508 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
509 __FUNCTION__); \
510 &_rtx->u.fld[_n]; }))
511
512 #define RTVEC_ELT(RTVEC, I) __extension__ \
513 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
514 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
515 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
516 __FUNCTION__); \
517 &_rtvec->elem[_i]; }))
518
519 #define XWINT(RTX, N) __extension__ \
520 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
521 const enum rtx_code _code = GET_CODE (_rtx); \
522 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
523 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
524 __FUNCTION__); \
525 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
526 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
527 __FUNCTION__); \
528 &_rtx->u.hwint[_n]; }))
529
530 #define XCWINT(RTX, N, C) __extension__ \
531 (*({ __typeof (RTX) const _rtx = (RTX); \
532 if (GET_CODE (_rtx) != (C)) \
533 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
534 __FUNCTION__); \
535 &_rtx->u.hwint[N]; }))
536
537 #define XCMWINT(RTX, N, C, M) __extension__ \
538 (*({ __typeof (RTX) const _rtx = (RTX); \
539 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
540 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
541 __LINE__, __FUNCTION__); \
542 &_rtx->u.hwint[N]; }))
543
544 #define XCNMPRV(RTX, C, M) __extension__ \
545 ({ __typeof (RTX) const _rtx = (RTX); \
546 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
547 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
548 __LINE__, __FUNCTION__); \
549 &_rtx->u.rv; })
550
551 #define XCNMPFV(RTX, C, M) __extension__ \
552 ({ __typeof (RTX) const _rtx = (RTX); \
553 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
554 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
555 __LINE__, __FUNCTION__); \
556 &_rtx->u.fv; })
557
558 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
559 ({ __typeof (RTX) const _symbol = (RTX); \
560 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
561 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
562 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
563 __FUNCTION__); \
564 &_symbol->u.block_sym; })
565
566 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
567 const char *)
568 ATTRIBUTE_NORETURN;
569 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
570 const char *)
571 ATTRIBUTE_NORETURN;
572 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
573 int, const char *)
574 ATTRIBUTE_NORETURN;
575 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
576 int, const char *)
577 ATTRIBUTE_NORETURN;
578 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
579 const char *, int, const char *)
580 ATTRIBUTE_NORETURN;
581 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
582 bool, const char *, int, const char *)
583 ATTRIBUTE_NORETURN;
584 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
585 ATTRIBUTE_NORETURN;
586 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
587 const char *)
588 ATTRIBUTE_NORETURN;
589
590 #else /* not ENABLE_RTL_CHECKING */
591
592 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
593 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
594 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
595 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
596 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
597 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
598 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
599 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
600 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
601 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
602 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
603 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
604
605 #endif
606
607 /* General accessor macros for accessing the flags of an rtx. */
608
609 /* Access an individual rtx flag, with no checking of any kind. */
610 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
611
612 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
613 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
614 ({ __typeof (RTX) const _rtx = (RTX); \
615 if (GET_CODE(_rtx) != C1) \
616 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
617 __FUNCTION__); \
618 _rtx; })
619
620 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
621 ({ __typeof (RTX) const _rtx = (RTX); \
622 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
623 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
624 __FUNCTION__); \
625 _rtx; })
626
627 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
628 ({ __typeof (RTX) const _rtx = (RTX); \
629 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
630 && GET_CODE(_rtx) != C3) \
631 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
632 __FUNCTION__); \
633 _rtx; })
634
635 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
636 ({ __typeof (RTX) const _rtx = (RTX); \
637 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
638 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
639 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
640 __FUNCTION__); \
641 _rtx; })
642
643 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
644 ({ __typeof (RTX) const _rtx = (RTX); \
645 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
646 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
647 && GET_CODE(_rtx) != C5) \
648 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
649 __FUNCTION__); \
650 _rtx; })
651
652 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
653 __extension__ \
654 ({ __typeof (RTX) const _rtx = (RTX); \
655 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
656 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
657 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
658 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
659 __FUNCTION__); \
660 _rtx; })
661
662 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
663 __extension__ \
664 ({ __typeof (RTX) const _rtx = (RTX); \
665 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
666 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
667 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
668 && GET_CODE(_rtx) != C7) \
669 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
670 __FUNCTION__); \
671 _rtx; })
672
673 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
674 __extension__ \
675 ({ __typeof (RTX) const _rtx = (RTX); \
676 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
677 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
678 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
679 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
680 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
681 __FUNCTION__); \
682 _rtx; })
683
684 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
685 int, const char *)
686 ATTRIBUTE_NORETURN
687 ;
688
689 #else /* not ENABLE_RTL_FLAG_CHECKING */
690
691 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
692 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
693 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
694 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
695 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
696 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
697 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
698 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
699 #endif
700
701 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
702 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
703 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
704 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
705 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
706 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
707 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
708 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
709 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
710
711 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
712 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
713
714 /* These are like XINT, etc. except that they expect a '0' field instead
715 of the normal type code. */
716
717 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
718 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
719 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
720 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
721 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
722 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
723 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
724 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
725 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
726 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
727 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
728 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
729 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
730 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
731
732 /* Access a '0' field with any type. */
733 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
734
735 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
736 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
737 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
738 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
739 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
740 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
741 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
742 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
743 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
744 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
745
746 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
747 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
748
749 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
750 \f
751 /* ACCESS MACROS for particular fields of insns. */
752
753 /* Holds a unique number for each insn.
754 These are not necessarily sequentially increasing. */
755 #define INSN_UID(INSN) XINT (INSN, 0)
756
757 /* Chain insns together in sequence. */
758 #define PREV_INSN(INSN) XEXP (INSN, 1)
759 #define NEXT_INSN(INSN) XEXP (INSN, 2)
760
761 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
762 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
763 /* LOCATION of an RTX if relevant. */
764 #define RTL_LOCATION(X) (INSN_P (X) ? \
765 locator_location (INSN_LOCATOR (x)) \
766 : UNKNOWN_LOCATION)
767 /* LOCATION of current INSN. */
768 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
769 /* The body of an insn. */
770 #define PATTERN(INSN) XEXP (INSN, 5)
771
772 /* Code number of instruction, from when it was recognized.
773 -1 means this instruction has not been recognized yet. */
774 #define INSN_CODE(INSN) XINT (INSN, 6)
775
776 #define RTX_FRAME_RELATED_P(RTX) \
777 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
778 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
779
780 /* 1 if RTX is an insn that has been deleted. */
781 #define INSN_DELETED_P(RTX) \
782 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
783 CALL_INSN, JUMP_INSN, \
784 CODE_LABEL, BARRIER, NOTE)->volatil)
785
786 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
787 TREE_READONLY. */
788 #define RTL_CONST_CALL_P(RTX) \
789 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
790
791 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
792 DECL_PURE_P. */
793 #define RTL_PURE_CALL_P(RTX) \
794 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
795
796 /* 1 if RTX is a call to a const or pure function. */
797 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
798 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
799
800 /* 1 if RTX is a call to a looping const or pure function. Built from
801 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
802 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
803 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
804
805 /* 1 if RTX is a call_insn for a sibling call. */
806 #define SIBLING_CALL_P(RTX) \
807 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
808
809 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
810 #define INSN_ANNULLED_BRANCH_P(RTX) \
811 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
812
813 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
814 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
815 executed if the branch is taken. For annulled branches with this bit
816 clear, the insn should be executed only if the branch is not taken. */
817 #define INSN_FROM_TARGET_P(RTX) \
818 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
819
820 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
821 See the comments for ADDR_DIFF_VEC in rtl.def. */
822 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
823
824 /* In a VALUE, the value cselib has assigned to RTX.
825 This is a "struct cselib_val_struct", see cselib.h. */
826 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
827
828 /* Holds a list of notes on what this insn does to various REGs.
829 It is a chain of EXPR_LIST rtx's, where the second operand is the
830 chain pointer and the first operand is the REG being described.
831 The mode field of the EXPR_LIST contains not a real machine mode
832 but a value from enum reg_note. */
833 #define REG_NOTES(INSN) XEXP(INSN, 7)
834
835 enum reg_note
836 {
837 #define DEF_REG_NOTE(NAME) NAME,
838 #include "reg-notes.def"
839 #undef DEF_REG_NOTE
840 REG_NOTE_MAX
841 };
842
843 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
844 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
845 #define PUT_REG_NOTE_KIND(LINK, KIND) \
846 PUT_MODE (LINK, (enum machine_mode) (KIND))
847
848 /* Names for REG_NOTE's in EXPR_LIST insn's. */
849
850 extern const char * const reg_note_name[];
851 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
852
853 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
854 USE and CLOBBER expressions.
855 USE expressions list the registers filled with arguments that
856 are passed to the function.
857 CLOBBER expressions document the registers explicitly clobbered
858 by this CALL_INSN.
859 Pseudo registers can not be mentioned in this list. */
860 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
861
862 /* The label-number of a code-label. The assembler label
863 is made from `L' and the label-number printed in decimal.
864 Label numbers are unique in a compilation. */
865 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
866
867 /* In a NOTE that is a line number, this is a string for the file name that the
868 line is in. We use the same field to record block numbers temporarily in
869 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
870 between ints and pointers if we use a different macro for the block number.)
871 */
872
873 /* Opaque data. */
874 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
875 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
876 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
877 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
878 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
879 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
880 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
881
882 /* In a NOTE that is a line number, this is the line number.
883 Other kinds of NOTEs are identified by negative numbers here. */
884 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
885
886 /* Nonzero if INSN is a note marking the beginning of a basic block. */
887 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
888 (GET_CODE (INSN) == NOTE \
889 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
890
891 /* Variable declaration and the location of a variable. */
892 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
893 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
894
895 /* Initialization status of the variable in the location. Status
896 can be unknown, uninitialized or initialized. See enumeration
897 type below. */
898 #define PAT_VAR_LOCATION_STATUS(PAT) \
899 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
900
901 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
902 #define NOTE_VAR_LOCATION_DECL(NOTE) \
903 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
904 #define NOTE_VAR_LOCATION_LOC(NOTE) \
905 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
906 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
907 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
908
909 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
910 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
911
912 /* Accessors for a tree-expanded var location debug insn. */
913 #define INSN_VAR_LOCATION_DECL(INSN) \
914 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
915 #define INSN_VAR_LOCATION_LOC(INSN) \
916 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
917 #define INSN_VAR_LOCATION_STATUS(INSN) \
918 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
919
920 /* Expand to the RTL that denotes an unknown variable location in a
921 DEBUG_INSN. */
922 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
923
924 /* Determine whether X is such an unknown location. */
925 #define VAR_LOC_UNKNOWN_P(X) \
926 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
927
928 /* 1 if RTX is emitted after a call, but it should take effect before
929 the call returns. */
930 #define NOTE_DURING_CALL_P(RTX) \
931 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
932
933 /* Possible initialization status of a variable. When requested
934 by the user, this information is tracked and recorded in the DWARF
935 debug information, along with the variable's location. */
936 enum var_init_status
937 {
938 VAR_INIT_STATUS_UNKNOWN,
939 VAR_INIT_STATUS_UNINITIALIZED,
940 VAR_INIT_STATUS_INITIALIZED
941 };
942
943 /* Codes that appear in the NOTE_KIND field for kinds of notes
944 that are not line numbers. These codes are all negative.
945
946 Notice that we do not try to use zero here for any of
947 the special note codes because sometimes the source line
948 actually can be zero! This happens (for example) when we
949 are generating code for the per-translation-unit constructor
950 and destructor routines for some C++ translation unit. */
951
952 enum insn_note
953 {
954 #define DEF_INSN_NOTE(NAME) NAME,
955 #include "insn-notes.def"
956 #undef DEF_INSN_NOTE
957
958 NOTE_INSN_MAX
959 };
960
961 /* Names for NOTE insn's other than line numbers. */
962
963 extern const char * const note_insn_name[NOTE_INSN_MAX];
964 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
965 (note_insn_name[(NOTE_CODE)])
966
967 /* The name of a label, in case it corresponds to an explicit label
968 in the input source code. */
969 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
970
971 /* In jump.c, each label contains a count of the number
972 of LABEL_REFs that point at it, so unused labels can be deleted. */
973 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
974
975 /* Labels carry a two-bit field composed of the ->jump and ->call
976 bits. This field indicates whether the label is an alternate
977 entry point, and if so, what kind. */
978 enum label_kind
979 {
980 LABEL_NORMAL = 0, /* ordinary label */
981 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
982 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
983 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
984 };
985
986 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
987
988 /* Retrieve the kind of LABEL. */
989 #define LABEL_KIND(LABEL) __extension__ \
990 ({ __typeof (LABEL) const _label = (LABEL); \
991 if (GET_CODE (_label) != CODE_LABEL) \
992 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
993 __FUNCTION__); \
994 (enum label_kind) ((_label->jump << 1) | _label->call); })
995
996 /* Set the kind of LABEL. */
997 #define SET_LABEL_KIND(LABEL, KIND) do { \
998 __typeof (LABEL) const _label = (LABEL); \
999 const unsigned int _kind = (KIND); \
1000 if (GET_CODE (_label) != CODE_LABEL) \
1001 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1002 __FUNCTION__); \
1003 _label->jump = ((_kind >> 1) & 1); \
1004 _label->call = (_kind & 1); \
1005 } while (0)
1006
1007 #else
1008
1009 /* Retrieve the kind of LABEL. */
1010 #define LABEL_KIND(LABEL) \
1011 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1012
1013 /* Set the kind of LABEL. */
1014 #define SET_LABEL_KIND(LABEL, KIND) do { \
1015 rtx const _label = (LABEL); \
1016 const unsigned int _kind = (KIND); \
1017 _label->jump = ((_kind >> 1) & 1); \
1018 _label->call = (_kind & 1); \
1019 } while (0)
1020
1021 #endif /* rtl flag checking */
1022
1023 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1024
1025 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1026 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1027 be decremented and possibly the label can be deleted. */
1028 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1029
1030 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1031 goes through all the LABEL_REFs that jump to that label. The chain
1032 eventually winds up at the CODE_LABEL: it is circular. */
1033 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1034 \f
1035 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1036 be used on RHS. Use SET_REGNO to change the value. */
1037 #define REGNO(RTX) (rhs_regno(RTX))
1038 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1039
1040 /* ORIGINAL_REGNO holds the number the register originally had; for a
1041 pseudo register turned into a hard reg this will hold the old pseudo
1042 register number. */
1043 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1044
1045 /* Force the REGNO macro to only be used on the lhs. */
1046 static inline unsigned int
1047 rhs_regno (const_rtx x)
1048 {
1049 return XCUINT (x, 0, REG);
1050 }
1051
1052
1053
1054 /* 1 if RTX is a reg or parallel that is the current function's return
1055 value. */
1056 #define REG_FUNCTION_VALUE_P(RTX) \
1057 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1058
1059 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1060 #define REG_USERVAR_P(RTX) \
1061 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1062
1063 /* 1 if RTX is a reg that holds a pointer value. */
1064 #define REG_POINTER(RTX) \
1065 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1066
1067 /* 1 if RTX is a mem that holds a pointer value. */
1068 #define MEM_POINTER(RTX) \
1069 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1070
1071 /* 1 if the given register REG corresponds to a hard register. */
1072 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1073
1074 /* 1 if the given register number REG_NO corresponds to a hard register. */
1075 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1076
1077 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1078 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1079 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1080
1081 /* For a CONST_DOUBLE:
1082 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1083 low-order word and ..._HIGH the high-order.
1084 For a float, there is a REAL_VALUE_TYPE structure, and
1085 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1086 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1087 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1088 #define CONST_DOUBLE_REAL_VALUE(r) \
1089 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1090
1091 #define CONST_FIXED_VALUE(r) \
1092 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1093 #define CONST_FIXED_VALUE_HIGH(r) \
1094 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1095 #define CONST_FIXED_VALUE_LOW(r) \
1096 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1097
1098 /* For a CONST_VECTOR, return element #n. */
1099 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1100
1101 /* For a CONST_VECTOR, return the number of elements in a vector. */
1102 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1103
1104 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1105 SUBREG_BYTE extracts the byte-number. */
1106
1107 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1108 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1109
1110 /* in rtlanal.c */
1111 /* Return the right cost to give to an operation
1112 to make the cost of the corresponding register-to-register instruction
1113 N times that of a fast register-to-register instruction. */
1114 #define COSTS_N_INSNS(N) ((N) * 4)
1115
1116 /* Maximum cost of an rtl expression. This value has the special meaning
1117 not to use an rtx with this cost under any circumstances. */
1118 #define MAX_COST INT_MAX
1119
1120 extern void init_rtlanal (void);
1121 extern int rtx_cost (rtx, enum rtx_code, bool);
1122 extern int address_cost (rtx, enum machine_mode, bool);
1123 extern unsigned int subreg_lsb (const_rtx);
1124 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1125 unsigned int);
1126 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1127 unsigned int, enum machine_mode);
1128 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1129 unsigned int, enum machine_mode);
1130 extern unsigned int subreg_regno (const_rtx);
1131 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1132 unsigned int, enum machine_mode);
1133 extern unsigned int subreg_nregs (const_rtx);
1134 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1135 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1136 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1137 extern bool constant_pool_constant_p (rtx);
1138 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1139 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1140
1141
1142 /* 1 if RTX is a subreg containing a reg that is already known to be
1143 sign- or zero-extended from the mode of the subreg to the mode of
1144 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1145 extension.
1146
1147 When used as a LHS, is means that this extension must be done
1148 when assigning to SUBREG_REG. */
1149
1150 #define SUBREG_PROMOTED_VAR_P(RTX) \
1151 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1152
1153 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1154 do { \
1155 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1156 if ((VAL) < 0) \
1157 _rtx->volatil = 1; \
1158 else { \
1159 _rtx->volatil = 0; \
1160 _rtx->unchanging = (VAL); \
1161 } \
1162 } while (0)
1163
1164 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1165 this gives the necessary extensions:
1166 0 - signed
1167 1 - normal unsigned
1168 -1 - pointer unsigned, which most often can be handled like unsigned
1169 extension, except for generating instructions where we need to
1170 emit special code (ptr_extend insns) on some architectures. */
1171
1172 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1173 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1174 ? -1 : (int) (RTX)->unchanging)
1175
1176 /* Access various components of an ASM_OPERANDS rtx. */
1177
1178 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1179 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1180 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1181 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1182 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1183 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1184 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1185 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1186 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1187 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1188 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1189 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1190 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1191 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1192 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1193 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1194 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1195 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1196
1197 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1198 #define MEM_READONLY_P(RTX) \
1199 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1200
1201 /* 1 if RTX is a mem and we should keep the alias set for this mem
1202 unchanged when we access a component. Set to 1, or example, when we
1203 are already in a non-addressable component of an aggregate. */
1204 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1205 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1206
1207 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1208 #define MEM_VOLATILE_P(RTX) \
1209 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1210 ASM_INPUT)->volatil)
1211
1212 /* 1 if RTX is a mem that refers to an aggregate, either to the
1213 aggregate itself or to a field of the aggregate. If zero, RTX may
1214 or may not be such a reference. */
1215 #define MEM_IN_STRUCT_P(RTX) \
1216 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1217
1218 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1219 not refer to a scalar. */
1220 #define MEM_SCALAR_P(RTX) \
1221 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1222
1223 /* 1 if RTX is a mem that cannot trap. */
1224 #define MEM_NOTRAP_P(RTX) \
1225 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1226
1227 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1228 RTX. Otherwise, vice versa. Use this macro only when you are
1229 *sure* that you know that the MEM is in a structure, or is a
1230 scalar. VAL is evaluated only once. */
1231 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1232 do { \
1233 if (VAL) \
1234 { \
1235 MEM_IN_STRUCT_P (RTX) = 1; \
1236 MEM_SCALAR_P (RTX) = 0; \
1237 } \
1238 else \
1239 { \
1240 MEM_IN_STRUCT_P (RTX) = 0; \
1241 MEM_SCALAR_P (RTX) = 1; \
1242 } \
1243 } while (0)
1244
1245 /* The memory attribute block. We provide access macros for each value
1246 in the block and provide defaults if none specified. */
1247 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1248
1249 /* The register attribute block. We provide access macros for each value
1250 in the block and provide defaults if none specified. */
1251 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1252
1253 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1254 set, and may alias anything. Otherwise, the MEM can only alias
1255 MEMs in a conflicting alias set. This value is set in a
1256 language-dependent manner in the front-end, and should not be
1257 altered in the back-end. These set numbers are tested with
1258 alias_sets_conflict_p. */
1259 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1260
1261 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1262 refer to part of a DECL. It may also be a COMPONENT_REF. */
1263 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1264
1265 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1266 RTX that is always a CONST_INT. */
1267 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1268
1269 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1270 is always a CONST_INT. */
1271 #define MEM_SIZE(RTX) \
1272 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1273 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1274 : 0)
1275
1276 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1277 mode as a default when STRICT_ALIGNMENT, but not if not. */
1278 #define MEM_ALIGN(RTX) \
1279 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1280 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1281 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1282
1283 /* For a REG rtx, the decl it is known to refer to, if it is known to
1284 refer to part of a DECL. */
1285 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1286
1287 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1288 HOST_WIDE_INT. */
1289 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1290
1291 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1292 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1293 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1294 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1295 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1296 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1297 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1298 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1299 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1300 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1301
1302 /* 1 if RTX is a label_ref for a nonlocal label. */
1303 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1304 REG_LABEL_TARGET note. */
1305 #define LABEL_REF_NONLOCAL_P(RTX) \
1306 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1307
1308 /* 1 if RTX is a code_label that should always be considered to be needed. */
1309 #define LABEL_PRESERVE_P(RTX) \
1310 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1311
1312 /* During sched, 1 if RTX is an insn that must be scheduled together
1313 with the preceding insn. */
1314 #define SCHED_GROUP_P(RTX) \
1315 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1316 JUMP_INSN, CALL_INSN \
1317 )->in_struct)
1318
1319 /* For a SET rtx, SET_DEST is the place that is set
1320 and SET_SRC is the value it is set to. */
1321 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1322 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1323 #define SET_IS_RETURN_P(RTX) \
1324 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1325
1326 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1327 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1328 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1329
1330 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1331 conditionally executing the code on, COND_EXEC_CODE is the code
1332 to execute if the condition is true. */
1333 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1334 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1335
1336 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1337 constants pool. */
1338 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1339 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1340
1341 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1342 tree constant pool. This information is private to varasm.c. */
1343 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1344 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1345 (RTX), SYMBOL_REF)->frame_related)
1346
1347 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1348 #define SYMBOL_REF_FLAG(RTX) \
1349 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1350
1351 /* 1 if RTX is a symbol_ref that has been the library function in
1352 emit_library_call. */
1353 #define SYMBOL_REF_USED(RTX) \
1354 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1355
1356 /* 1 if RTX is a symbol_ref for a weak symbol. */
1357 #define SYMBOL_REF_WEAK(RTX) \
1358 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1359
1360 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1361 SYMBOL_REF_CONSTANT. */
1362 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1363
1364 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1365 pool symbol. */
1366 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1367 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1368
1369 /* The tree (decl or constant) associated with the symbol, or null. */
1370 #define SYMBOL_REF_DECL(RTX) \
1371 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1372
1373 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1374 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1375 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1376
1377 /* The rtx constant pool entry for a symbol, or null. */
1378 #define SYMBOL_REF_CONSTANT(RTX) \
1379 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1380
1381 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1382 information derivable from the tree decl associated with this symbol.
1383 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1384 decl. In some cases this is a bug. But beyond that, it's nice to cache
1385 this information to avoid recomputing it. Finally, this allows space for
1386 the target to store more than one bit of information, as with
1387 SYMBOL_REF_FLAG. */
1388 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1389
1390 /* These flags are common enough to be defined for all targets. They
1391 are computed by the default version of targetm.encode_section_info. */
1392
1393 /* Set if this symbol is a function. */
1394 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1395 #define SYMBOL_REF_FUNCTION_P(RTX) \
1396 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1397 /* Set if targetm.binds_local_p is true. */
1398 #define SYMBOL_FLAG_LOCAL (1 << 1)
1399 #define SYMBOL_REF_LOCAL_P(RTX) \
1400 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1401 /* Set if targetm.in_small_data_p is true. */
1402 #define SYMBOL_FLAG_SMALL (1 << 2)
1403 #define SYMBOL_REF_SMALL_P(RTX) \
1404 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1405 /* The three-bit field at [5:3] is true for TLS variables; use
1406 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1407 #define SYMBOL_FLAG_TLS_SHIFT 3
1408 #define SYMBOL_REF_TLS_MODEL(RTX) \
1409 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1410 /* Set if this symbol is not defined in this translation unit. */
1411 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1412 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1413 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1414 /* Set if this symbol has a block_symbol structure associated with it. */
1415 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1416 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1417 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1418 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1419 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1420 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1421 #define SYMBOL_REF_ANCHOR_P(RTX) \
1422 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1423
1424 /* Subsequent bits are available for the target to use. */
1425 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1426 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1427
1428 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1429 structure to which the symbol belongs, or NULL if it has not been
1430 assigned a block. */
1431 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1432
1433 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1434 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1435 RTX has not yet been assigned to a block, or it has not been given an
1436 offset within that block. */
1437 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1438
1439 /* True if RTX is flagged to be a scheduling barrier. */
1440 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1441 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1442
1443 /* Indicate whether the machine has any sort of auto increment addressing.
1444 If not, we can avoid checking for REG_INC notes. */
1445
1446 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1447 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1448 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1449 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1450 #define AUTO_INC_DEC
1451 #endif
1452
1453 /* Define a macro to look for REG_INC notes,
1454 but save time on machines where they never exist. */
1455
1456 #ifdef AUTO_INC_DEC
1457 #define FIND_REG_INC_NOTE(INSN, REG) \
1458 ((REG) != NULL_RTX && REG_P ((REG)) \
1459 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1460 : find_reg_note ((INSN), REG_INC, (REG)))
1461 #else
1462 #define FIND_REG_INC_NOTE(INSN, REG) 0
1463 #endif
1464
1465 #ifndef HAVE_PRE_INCREMENT
1466 #define HAVE_PRE_INCREMENT 0
1467 #endif
1468
1469 #ifndef HAVE_PRE_DECREMENT
1470 #define HAVE_PRE_DECREMENT 0
1471 #endif
1472
1473 #ifndef HAVE_POST_INCREMENT
1474 #define HAVE_POST_INCREMENT 0
1475 #endif
1476
1477 #ifndef HAVE_POST_DECREMENT
1478 #define HAVE_POST_DECREMENT 0
1479 #endif
1480
1481 #ifndef HAVE_POST_MODIFY_DISP
1482 #define HAVE_POST_MODIFY_DISP 0
1483 #endif
1484
1485 #ifndef HAVE_POST_MODIFY_REG
1486 #define HAVE_POST_MODIFY_REG 0
1487 #endif
1488
1489 #ifndef HAVE_PRE_MODIFY_DISP
1490 #define HAVE_PRE_MODIFY_DISP 0
1491 #endif
1492
1493 #ifndef HAVE_PRE_MODIFY_REG
1494 #define HAVE_PRE_MODIFY_REG 0
1495 #endif
1496
1497
1498 /* Some architectures do not have complete pre/post increment/decrement
1499 instruction sets, or only move some modes efficiently. These macros
1500 allow us to tune autoincrement generation. */
1501
1502 #ifndef USE_LOAD_POST_INCREMENT
1503 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1504 #endif
1505
1506 #ifndef USE_LOAD_POST_DECREMENT
1507 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1508 #endif
1509
1510 #ifndef USE_LOAD_PRE_INCREMENT
1511 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1512 #endif
1513
1514 #ifndef USE_LOAD_PRE_DECREMENT
1515 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1516 #endif
1517
1518 #ifndef USE_STORE_POST_INCREMENT
1519 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1520 #endif
1521
1522 #ifndef USE_STORE_POST_DECREMENT
1523 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1524 #endif
1525
1526 #ifndef USE_STORE_PRE_INCREMENT
1527 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1528 #endif
1529
1530 #ifndef USE_STORE_PRE_DECREMENT
1531 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1532 #endif
1533 \f
1534 /* Nonzero when we are generating CONCATs. */
1535 extern int generating_concat_p;
1536
1537 /* Nonzero when we are expanding trees to RTL. */
1538 extern int currently_expanding_to_rtl;
1539
1540 /* Generally useful functions. */
1541
1542 /* In expmed.c */
1543 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1544
1545 /* In explow.c */
1546 extern void set_stack_check_libfunc (rtx);
1547 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1548 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1549
1550 /* In emit-rtl.c */
1551 extern rtx gen_blockage (void);
1552 extern rtvec gen_rtvec (int, ...);
1553 extern rtx copy_insn_1 (rtx);
1554 extern rtx copy_insn (rtx);
1555 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1556 extern rtx emit_copy_of_insn_after (rtx, rtx);
1557 extern void set_reg_attrs_from_value (rtx, rtx);
1558 extern void set_reg_attrs_for_parm (rtx, rtx);
1559 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1560 extern void adjust_reg_mode (rtx, enum machine_mode);
1561 extern int mem_expr_equal_p (const_tree, const_tree);
1562
1563 /* In rtl.c */
1564 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1565 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1566
1567 extern rtvec rtvec_alloc (int);
1568 extern bool shared_const_p (const_rtx);
1569 extern rtx copy_rtx (rtx);
1570 extern void dump_rtx_statistics (void);
1571
1572 /* In emit-rtl.c */
1573 extern rtx copy_rtx_if_shared (rtx);
1574
1575 /* In rtl.c */
1576 extern unsigned int rtx_size (const_rtx);
1577 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1578 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1579 extern int rtx_equal_p (const_rtx, const_rtx);
1580
1581 /* In emit-rtl.c */
1582 extern rtvec gen_rtvec_v (int, rtx *);
1583 extern rtx gen_reg_rtx (enum machine_mode);
1584 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1585 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1586 extern rtx gen_reg_rtx_and_attrs (rtx);
1587 extern rtx gen_label_rtx (void);
1588 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1589
1590 /* In cse.c */
1591 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1592
1593 /* In emit-rtl.c */
1594 extern rtx gen_highpart (enum machine_mode, rtx);
1595 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1596 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1597
1598 /* In emit-rtl.c */
1599 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1600 extern int subreg_lowpart_p (const_rtx);
1601 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1602 enum machine_mode);
1603 extern unsigned int subreg_highpart_offset (enum machine_mode,
1604 enum machine_mode);
1605 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1606 extern rtx make_safe_from (rtx, rtx);
1607 extern rtx convert_memory_address (enum machine_mode, rtx);
1608 extern rtx get_insns (void);
1609 extern const char *get_insn_name (int);
1610 extern rtx get_last_insn (void);
1611 extern rtx get_last_insn_anywhere (void);
1612 extern rtx get_first_nonnote_insn (void);
1613 extern rtx get_last_nonnote_insn (void);
1614 extern void start_sequence (void);
1615 extern void push_to_sequence (rtx);
1616 extern void push_to_sequence2 (rtx, rtx);
1617 extern void end_sequence (void);
1618 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1619 enum machine_mode);
1620
1621 /* In loop-iv.c */
1622
1623 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1624
1625 /* In varasm.c */
1626 extern rtx force_const_mem (enum machine_mode, rtx);
1627
1628 /* In varasm.c */
1629
1630 struct function;
1631 extern rtx get_pool_constant (rtx);
1632 extern rtx get_pool_constant_mark (rtx, bool *);
1633 extern enum machine_mode get_pool_mode (const_rtx);
1634 extern rtx simplify_subtraction (rtx);
1635
1636 /* In function.c */
1637 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1638 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1639 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1640 extern rtx assign_stack_temp_for_type (enum machine_mode,
1641 HOST_WIDE_INT, int, tree);
1642 extern rtx assign_temp (tree, int, int, int);
1643
1644 /* In emit-rtl.c */
1645 extern rtx emit_insn_before (rtx, rtx);
1646 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1647 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1648 extern rtx emit_jump_insn_before (rtx, rtx);
1649 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1650 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1651 extern rtx emit_call_insn_before (rtx, rtx);
1652 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1653 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1654 extern rtx emit_debug_insn_before (rtx, rtx);
1655 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1656 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1657 extern rtx emit_barrier_before (rtx);
1658 extern rtx emit_label_before (rtx, rtx);
1659 extern rtx emit_note_before (enum insn_note, rtx);
1660 extern rtx emit_insn_after (rtx, rtx);
1661 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1662 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1663 extern rtx emit_jump_insn_after (rtx, rtx);
1664 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1665 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1666 extern rtx emit_call_insn_after (rtx, rtx);
1667 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1668 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1669 extern rtx emit_debug_insn_after (rtx, rtx);
1670 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1671 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1672 extern rtx emit_barrier_after (rtx);
1673 extern rtx emit_label_after (rtx, rtx);
1674 extern rtx emit_note_after (enum insn_note, rtx);
1675 extern rtx emit_insn (rtx);
1676 extern rtx emit_debug_insn (rtx);
1677 extern rtx emit_jump_insn (rtx);
1678 extern rtx emit_call_insn (rtx);
1679 extern rtx emit_label (rtx);
1680 extern rtx emit_barrier (void);
1681 extern rtx emit_note (enum insn_note);
1682 extern rtx emit_note_copy (rtx);
1683 extern rtx gen_clobber (rtx);
1684 extern rtx emit_clobber (rtx);
1685 extern rtx gen_use (rtx);
1686 extern rtx emit_use (rtx);
1687 extern rtx make_insn_raw (rtx);
1688 extern rtx make_debug_insn_raw (rtx);
1689 extern rtx make_jump_insn_raw (rtx);
1690 extern void add_function_usage_to (rtx, rtx);
1691 extern rtx last_call_insn (void);
1692 extern rtx previous_insn (rtx);
1693 extern rtx next_insn (rtx);
1694 extern rtx prev_nonnote_insn (rtx);
1695 extern rtx prev_nonnote_insn_bb (rtx);
1696 extern rtx next_nonnote_insn (rtx);
1697 extern rtx next_nonnote_insn_bb (rtx);
1698 extern rtx prev_nondebug_insn (rtx);
1699 extern rtx next_nondebug_insn (rtx);
1700 extern rtx prev_real_insn (rtx);
1701 extern rtx next_real_insn (rtx);
1702 extern rtx prev_active_insn (rtx);
1703 extern rtx next_active_insn (rtx);
1704 extern int active_insn_p (const_rtx);
1705 extern rtx prev_label (rtx);
1706 extern rtx next_label (rtx);
1707 extern rtx skip_consecutive_labels (rtx);
1708 extern rtx next_cc0_user (rtx);
1709 extern rtx prev_cc0_setter (rtx);
1710
1711 /* In cfglayout.c */
1712 extern int insn_line (const_rtx);
1713 extern const char * insn_file (const_rtx);
1714 extern location_t locator_location (int);
1715 extern int locator_line (int);
1716 extern const char * locator_file (int);
1717 extern bool locator_eq (int, int);
1718 extern int prologue_locator, epilogue_locator;
1719
1720 /* In jump.c */
1721 extern enum rtx_code reverse_condition (enum rtx_code);
1722 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1723 extern enum rtx_code swap_condition (enum rtx_code);
1724 extern enum rtx_code unsigned_condition (enum rtx_code);
1725 extern enum rtx_code signed_condition (enum rtx_code);
1726 extern void mark_jump_label (rtx, rtx, int);
1727 extern unsigned int cleanup_barriers (void);
1728
1729 /* In jump.c */
1730 extern rtx delete_related_insns (rtx);
1731
1732 /* In recog.c */
1733 extern rtx *find_constant_term_loc (rtx *);
1734
1735 /* In emit-rtl.c */
1736 extern rtx try_split (rtx, rtx, int);
1737 extern int split_branch_probability;
1738
1739 /* In unknown file */
1740 extern rtx split_insns (rtx, rtx);
1741
1742 /* In simplify-rtx.c */
1743 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1744 rtx, enum machine_mode);
1745 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1746 enum machine_mode);
1747 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1748 rtx, rtx);
1749 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1750 rtx);
1751 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1752 enum machine_mode, rtx, rtx, rtx);
1753 extern rtx simplify_const_relational_operation (enum rtx_code,
1754 enum machine_mode, rtx, rtx);
1755 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1756 enum machine_mode, rtx, rtx);
1757 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1758 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1759 enum machine_mode);
1760 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1761 enum machine_mode, rtx, rtx, rtx);
1762 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1763 enum machine_mode, rtx, rtx);
1764 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1765 unsigned int);
1766 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1767 unsigned int);
1768 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1769 extern rtx simplify_rtx (const_rtx);
1770 extern rtx avoid_constant_pool_reference (rtx);
1771 extern rtx delegitimize_mem_from_attrs (rtx);
1772 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1773
1774 /* In reginfo.c */
1775 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1776 bool);
1777
1778 /* In emit-rtl.c */
1779 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1780 extern void set_insn_deleted (rtx);
1781
1782 /* Functions in rtlanal.c */
1783
1784 /* Single set is implemented as macro for performance reasons. */
1785 #define single_set(I) (INSN_P (I) \
1786 ? (GET_CODE (PATTERN (I)) == SET \
1787 ? PATTERN (I) : single_set_1 (I)) \
1788 : NULL_RTX)
1789 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1790
1791 /* Structure used for passing data to REPLACE_LABEL. */
1792 typedef struct replace_label_data
1793 {
1794 rtx r1;
1795 rtx r2;
1796 bool update_label_nuses;
1797 } replace_label_data;
1798
1799 extern int rtx_addr_can_trap_p (const_rtx);
1800 extern bool nonzero_address_p (const_rtx);
1801 extern int rtx_unstable_p (const_rtx);
1802 extern bool rtx_varies_p (const_rtx, bool);
1803 extern bool rtx_addr_varies_p (const_rtx, bool);
1804 extern HOST_WIDE_INT get_integer_term (const_rtx);
1805 extern rtx get_related_value (const_rtx);
1806 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1807 extern void split_const (rtx, rtx *, rtx *);
1808 extern int reg_mentioned_p (const_rtx, const_rtx);
1809 extern int count_occurrences (const_rtx, const_rtx, int);
1810 extern int reg_referenced_p (const_rtx, const_rtx);
1811 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1812 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1813 extern int commutative_operand_precedence (rtx);
1814 extern bool swap_commutative_operands_p (rtx, rtx);
1815 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1816 extern int no_labels_between_p (const_rtx, const_rtx);
1817 extern int modified_in_p (const_rtx, const_rtx);
1818 extern int reg_set_p (const_rtx, const_rtx);
1819 extern rtx single_set_2 (const_rtx, const_rtx);
1820 extern int multiple_sets (const_rtx);
1821 extern int set_noop_p (const_rtx);
1822 extern int noop_move_p (const_rtx);
1823 extern rtx find_last_value (rtx, rtx *, rtx, int);
1824 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1825 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1826 extern const_rtx set_of (const_rtx, const_rtx);
1827 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1828 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1829 extern int dead_or_set_p (const_rtx, const_rtx);
1830 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1831 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1832 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1833 extern rtx find_reg_equal_equiv_note (const_rtx);
1834 extern rtx find_constant_src (const_rtx);
1835 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1836 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1837 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1838 extern void add_reg_note (rtx, enum reg_note, rtx);
1839 extern void remove_note (rtx, const_rtx);
1840 extern void remove_reg_equal_equiv_notes (rtx);
1841 extern int side_effects_p (const_rtx);
1842 extern int volatile_refs_p (const_rtx);
1843 extern int volatile_insn_p (const_rtx);
1844 extern int may_trap_p_1 (const_rtx, unsigned);
1845 extern int may_trap_p (const_rtx);
1846 extern int may_trap_or_fault_p (const_rtx);
1847 extern bool can_throw_internal (const_rtx);
1848 extern bool can_throw_external (const_rtx);
1849 extern bool insn_could_throw_p (const_rtx);
1850 extern bool insn_nothrow_p (const_rtx);
1851 extern bool can_nonlocal_goto (const_rtx);
1852 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1853 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1854 extern int inequality_comparisons_p (const_rtx);
1855 extern rtx replace_rtx (rtx, rtx, rtx);
1856 extern int replace_label (rtx *, void *);
1857 extern int rtx_referenced_p (rtx, rtx);
1858 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1859 extern int computed_jump_p (const_rtx);
1860
1861 typedef int (*rtx_function) (rtx *, void *);
1862 extern int for_each_rtx (rtx *, rtx_function, void *);
1863
1864 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1865 rtx *, rtx *);
1866 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1867 rtx_equal_p_callback_function);
1868
1869 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1870 enum machine_mode *);
1871 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1872 bool, hash_rtx_callback_function);
1873
1874 extern rtx regno_use_in (unsigned int, rtx);
1875 extern int auto_inc_p (const_rtx);
1876 extern int in_expr_list_p (const_rtx, const_rtx);
1877 extern void remove_node_from_expr_list (const_rtx, rtx *);
1878 extern int loc_mentioned_in_p (rtx *, const_rtx);
1879 extern rtx find_first_parameter_load (rtx, rtx);
1880 extern bool keep_with_call_p (const_rtx);
1881 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1882 extern int insn_rtx_cost (rtx, bool);
1883
1884 /* Given an insn and condition, return a canonical description of
1885 the test being made. */
1886 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1887
1888 /* Given a JUMP_INSN, return a canonical description of the test
1889 being made. */
1890 extern rtx get_condition (rtx, rtx *, int, int);
1891
1892 /* Information about a subreg of a hard register. */
1893 struct subreg_info
1894 {
1895 /* Offset of first hard register involved in the subreg. */
1896 int offset;
1897 /* Number of hard registers involved in the subreg. */
1898 int nregs;
1899 /* Whether this subreg can be represented as a hard reg with the new
1900 mode. */
1901 bool representable_p;
1902 };
1903
1904 extern void subreg_get_info (unsigned int, enum machine_mode,
1905 unsigned int, enum machine_mode,
1906 struct subreg_info *);
1907
1908 /* lists.c */
1909
1910 extern void free_EXPR_LIST_list (rtx *);
1911 extern void free_INSN_LIST_list (rtx *);
1912 extern void free_EXPR_LIST_node (rtx);
1913 extern void free_INSN_LIST_node (rtx);
1914 extern rtx alloc_INSN_LIST (rtx, rtx);
1915 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1916 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1917 extern rtx remove_list_elem (rtx, rtx *);
1918 extern rtx remove_free_INSN_LIST_node (rtx *);
1919 extern rtx remove_free_EXPR_LIST_node (rtx *);
1920
1921
1922 /* reginfo.c */
1923
1924 /* Initialize may_move_cost and friends for mode M. */
1925 extern void init_move_cost (enum machine_mode);
1926 /* Resize reg info. */
1927 extern bool resize_reg_info (void);
1928 /* Free up register info memory. */
1929 extern void free_reg_info (void);
1930
1931 /* recog.c */
1932 extern rtx extract_asm_operands (rtx);
1933 extern int asm_noperands (const_rtx);
1934 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1935 enum machine_mode *, location_t *);
1936
1937 extern enum reg_class reg_preferred_class (int);
1938 extern enum reg_class reg_alternate_class (int);
1939 extern enum reg_class reg_cover_class (int);
1940 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1941 enum reg_class);
1942
1943 extern void split_all_insns (void);
1944 extern unsigned int split_all_insns_noflow (void);
1945
1946 #define MAX_SAVED_CONST_INT 64
1947 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1948
1949 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1950 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1951 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1952 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1953 extern GTY(()) rtx const_true_rtx;
1954
1955 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1956
1957 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1958 same as VOIDmode. */
1959
1960 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1961
1962 /* Likewise, for the constants 1 and 2. */
1963
1964 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1965 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1966
1967 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1968 is used to represent the frame pointer. This is because the
1969 hard frame pointer and the automatic variables are separated by an amount
1970 that cannot be determined until after register allocation. We can assume
1971 that in this case ELIMINABLE_REGS will be defined, one action of which
1972 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1973 #ifndef HARD_FRAME_POINTER_REGNUM
1974 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1975 #endif
1976
1977 /* Index labels for global_rtl. */
1978 enum global_rtl_index
1979 {
1980 GR_PC,
1981 GR_CC0,
1982 GR_STACK_POINTER,
1983 GR_FRAME_POINTER,
1984 /* For register elimination to work properly these hard_frame_pointer_rtx,
1985 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1986 the same register. */
1987 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1988 GR_ARG_POINTER = GR_FRAME_POINTER,
1989 #endif
1990 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1991 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1992 #else
1993 GR_HARD_FRAME_POINTER,
1994 #endif
1995 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1996 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1997 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1998 #else
1999 GR_ARG_POINTER,
2000 #endif
2001 #endif
2002 GR_VIRTUAL_INCOMING_ARGS,
2003 GR_VIRTUAL_STACK_ARGS,
2004 GR_VIRTUAL_STACK_DYNAMIC,
2005 GR_VIRTUAL_OUTGOING_ARGS,
2006 GR_VIRTUAL_CFA,
2007
2008 GR_MAX
2009 };
2010
2011 /* Pointers to standard pieces of rtx are stored here. */
2012 extern GTY(()) rtx global_rtl[GR_MAX];
2013
2014 /* Standard pieces of rtx, to be substituted directly into things. */
2015 #define pc_rtx (global_rtl[GR_PC])
2016 #define cc0_rtx (global_rtl[GR_CC0])
2017
2018 /* All references to certain hard regs, except those created
2019 by allocating pseudo regs into them (when that's possible),
2020 go through these unique rtx objects. */
2021 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2022 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2023 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2024 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2025
2026 extern GTY(()) rtx pic_offset_table_rtx;
2027 extern GTY(()) rtx return_address_pointer_rtx;
2028
2029 /* Include the RTL generation functions. */
2030
2031 #ifndef GENERATOR_FILE
2032 #include "genrtl.h"
2033 #undef gen_rtx_ASM_INPUT
2034 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2035 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2036 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2037 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2038 #endif
2039
2040 /* There are some RTL codes that require special attention; the
2041 generation functions included above do the raw handling. If you
2042 add to this list, modify special_rtx in gengenrtl.c as well. */
2043
2044 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2045 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2046 extern rtx gen_raw_REG (enum machine_mode, int);
2047 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2048 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2049 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2050
2051 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2052
2053 /* Virtual registers are used during RTL generation to refer to locations into
2054 the stack frame when the actual location isn't known until RTL generation
2055 is complete. The routine instantiate_virtual_regs replaces these with
2056 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2057 a constant. */
2058
2059 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2060
2061 /* This points to the first word of the incoming arguments passed on the stack,
2062 either by the caller or by the callee when pretending it was passed by the
2063 caller. */
2064
2065 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2066
2067 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2068
2069 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2070 variable on the stack. Otherwise, it points to the first variable on
2071 the stack. */
2072
2073 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2074
2075 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2076
2077 /* This points to the location of dynamically-allocated memory on the stack
2078 immediately after the stack pointer has been adjusted by the amount
2079 desired. */
2080
2081 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2082
2083 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2084
2085 /* This points to the location in the stack at which outgoing arguments should
2086 be written when the stack is pre-pushed (arguments pushed using push
2087 insns always use sp). */
2088
2089 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2090
2091 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2092
2093 /* This points to the Canonical Frame Address of the function. This
2094 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2095 but is calculated relative to the arg pointer for simplicity; the
2096 frame pointer nor stack pointer are necessarily fixed relative to
2097 the CFA until after reload. */
2098
2099 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2100
2101 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2102
2103 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2104
2105 /* Nonzero if REGNUM is a pointer into the stack frame. */
2106 #define REGNO_PTR_FRAME_P(REGNUM) \
2107 ((REGNUM) == STACK_POINTER_REGNUM \
2108 || (REGNUM) == FRAME_POINTER_REGNUM \
2109 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2110 || (REGNUM) == ARG_POINTER_REGNUM \
2111 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2112 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2113
2114 /* REGNUM never really appearing in the INSN stream. */
2115 #define INVALID_REGNUM (~(unsigned int) 0)
2116
2117 extern rtx output_constant_def (tree, int);
2118 extern rtx lookup_constant_def (tree);
2119
2120 /* Nonzero after end of reload pass.
2121 Set to 1 or 0 by reload1.c. */
2122
2123 extern int reload_completed;
2124
2125 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2126 extern int epilogue_completed;
2127
2128 /* Set to 1 while reload_as_needed is operating.
2129 Required by some machines to handle any generated moves differently. */
2130
2131 extern int reload_in_progress;
2132
2133 /* This macro indicates whether you may create a new
2134 pseudo-register. */
2135
2136 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2137
2138 #ifdef STACK_REGS
2139 /* Nonzero after end of regstack pass.
2140 Set to 1 or 0 by reg-stack.c. */
2141 extern int regstack_completed;
2142 #endif
2143
2144 /* If this is nonzero, we do not bother generating VOLATILE
2145 around volatile memory references, and we are willing to
2146 output indirect addresses. If cse is to follow, we reject
2147 indirect addresses so a useful potential cse is generated;
2148 if it is used only once, instruction combination will produce
2149 the same indirect address eventually. */
2150 extern int cse_not_expected;
2151
2152 /* Translates rtx code to tree code, for those codes needed by
2153 REAL_ARITHMETIC. The function returns an int because the caller may not
2154 know what `enum tree_code' means. */
2155
2156 extern int rtx_to_tree_code (enum rtx_code);
2157
2158 /* In cse.c */
2159 extern int delete_trivially_dead_insns (rtx, int);
2160 extern int cse_main (rtx, int);
2161 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2162 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2163
2164 /* In jump.c */
2165 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2166 extern int condjump_p (const_rtx);
2167 extern int any_condjump_p (const_rtx);
2168 extern int any_uncondjump_p (const_rtx);
2169 extern rtx pc_set (const_rtx);
2170 extern rtx condjump_label (const_rtx);
2171 extern int simplejump_p (const_rtx);
2172 extern int returnjump_p (rtx);
2173 extern int eh_returnjump_p (rtx);
2174 extern int onlyjump_p (const_rtx);
2175 extern int only_sets_cc0_p (const_rtx);
2176 extern int sets_cc0_p (const_rtx);
2177 extern int invert_jump_1 (rtx, rtx);
2178 extern int invert_jump (rtx, rtx, int);
2179 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2180 extern int true_regnum (const_rtx);
2181 extern unsigned int reg_or_subregno (const_rtx);
2182 extern int redirect_jump_1 (rtx, rtx);
2183 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2184 extern int redirect_jump (rtx, rtx, int);
2185 extern void rebuild_jump_labels (rtx);
2186 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2187 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2188 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2189 const_rtx, const_rtx);
2190 extern void delete_for_peephole (rtx, rtx);
2191 extern int condjump_in_parallel_p (const_rtx);
2192
2193 /* In emit-rtl.c. */
2194 extern int max_reg_num (void);
2195 extern int max_label_num (void);
2196 extern int get_first_label_num (void);
2197 extern void maybe_set_first_label_num (rtx);
2198 extern void delete_insns_since (rtx);
2199 extern void mark_reg_pointer (rtx, int);
2200 extern void mark_user_reg (rtx);
2201 extern void reset_used_flags (rtx);
2202 extern void set_used_flags (rtx);
2203 extern void reorder_insns (rtx, rtx, rtx);
2204 extern void reorder_insns_nobb (rtx, rtx, rtx);
2205 extern int get_max_uid (void);
2206 extern int get_max_insn_count (void);
2207 extern int in_sequence_p (void);
2208 extern void force_next_line_note (void);
2209 extern void init_emit (void);
2210 extern void init_emit_regs (void);
2211 extern void init_emit_once (int);
2212 extern void push_topmost_sequence (void);
2213 extern void pop_topmost_sequence (void);
2214 extern void set_new_first_and_last_insn (rtx, rtx);
2215 extern unsigned int unshare_all_rtl (void);
2216 extern void unshare_all_rtl_again (rtx);
2217 extern void unshare_all_rtl_in_chain (rtx);
2218 extern void verify_rtl_sharing (void);
2219 extern void set_first_insn (rtx);
2220 extern void set_last_insn (rtx);
2221 extern void link_cc0_insns (rtx);
2222 extern void add_insn (rtx);
2223 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2224 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2225 extern void remove_insn (rtx);
2226 extern rtx emit (rtx);
2227 extern rtx delete_insn (rtx);
2228 extern rtx entry_of_function (void);
2229 extern void emit_insn_at_entry (rtx);
2230 extern void delete_insn_chain (rtx, rtx, bool);
2231 extern rtx unlink_insn_chain (rtx, rtx);
2232 extern rtx delete_insn_and_edges (rtx);
2233 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2234 extern rtx gen_const_mem (enum machine_mode, rtx);
2235 extern rtx gen_frame_mem (enum machine_mode, rtx);
2236 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2237 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2238 const_rtx, unsigned int);
2239
2240 /* In combine.c */
2241 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2242 extern rtx remove_death (unsigned int, rtx);
2243 extern void dump_combine_stats (FILE *);
2244 extern void dump_combine_total_stats (FILE *);
2245
2246 /* In cfgcleanup.c */
2247 extern void delete_dead_jumptables (void);
2248
2249 /* In sched-vis.c. */
2250 extern void debug_bb_n_slim (int);
2251 extern void debug_bb_slim (struct basic_block_def *);
2252 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2253 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2254 extern void dump_insn_slim (FILE *f, rtx x);
2255 extern void debug_insn_slim (rtx x);
2256
2257 /* In sched-rgn.c. */
2258 extern void schedule_insns (void);
2259
2260 /* In sched-ebb.c. */
2261 extern void schedule_ebbs (void);
2262
2263 /* In haifa-sched.c. */
2264 extern void fix_sched_param (const char *, const char *);
2265
2266 /* In sel-sched-dump.c. */
2267 extern void sel_sched_fix_param (const char *param, const char *val);
2268
2269 /* In print-rtl.c */
2270 extern const char *print_rtx_head;
2271 extern void debug_rtx (const_rtx);
2272 extern void debug_rtx_list (const_rtx, int);
2273 extern void debug_rtx_range (const_rtx, const_rtx);
2274 extern const_rtx debug_rtx_find (const_rtx, int);
2275 extern void print_mem_expr (FILE *, const_tree);
2276 extern void print_rtl (FILE *, const_rtx);
2277 extern void print_simple_rtl (FILE *, const_rtx);
2278 extern int print_rtl_single (FILE *, const_rtx);
2279 extern void print_inline_rtx (FILE *, const_rtx, int);
2280
2281 /* In function.c */
2282 extern void reposition_prologue_and_epilogue_notes (void);
2283 extern int prologue_epilogue_contains (const_rtx);
2284 extern int sibcall_epilogue_contains (const_rtx);
2285 extern void mark_temp_addr_taken (rtx);
2286 extern void update_temp_slot_address (rtx, rtx);
2287 extern void maybe_copy_epilogue_insn (rtx, rtx);
2288
2289 /* In stmt.c */
2290 extern void expand_null_return (void);
2291 extern void expand_naked_return (void);
2292 extern void emit_jump (rtx);
2293
2294 /* In expr.c */
2295 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2296 unsigned int, int);
2297
2298 /* In cfgrtl.c */
2299 extern void print_rtl_with_bb (FILE *, const_rtx);
2300
2301 /* In cfg.c. */
2302 extern void dump_reg_info (FILE *);
2303 extern void dump_flow_info (FILE *, int);
2304
2305 /* In expmed.c */
2306 extern void init_expmed (void);
2307 extern void expand_inc (rtx, rtx);
2308 extern void expand_dec (rtx, rtx);
2309
2310 /* In gcse.c */
2311 extern bool can_copy_p (enum machine_mode);
2312 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2313 extern rtx fis_get_condition (rtx);
2314
2315 /* In ira.c */
2316 #ifdef HARD_CONST
2317 extern HARD_REG_SET eliminable_regset;
2318 #endif
2319 extern void mark_elimination (int, int);
2320
2321 /* In reginfo.c */
2322 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2323 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2324 extern void globalize_reg (int);
2325 extern void init_reg_modes_target (void);
2326 extern void init_regs (void);
2327 extern void reinit_regs (void);
2328 extern void init_fake_stack_mems (void);
2329 extern void save_register_info (void);
2330 extern void init_reg_sets (void);
2331 extern void regclass (rtx, int);
2332 extern void reg_scan (rtx, unsigned int);
2333 extern void fix_register (const char *, int, int);
2334 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2335 enum machine_mode);
2336
2337 /* In reorg.c */
2338 extern void dbr_schedule (rtx);
2339
2340 /* In reload1.c */
2341 extern int function_invariant_p (const_rtx);
2342
2343 /* In calls.c */
2344 enum libcall_type
2345 {
2346 LCT_NORMAL = 0,
2347 LCT_CONST = 1,
2348 LCT_PURE = 2,
2349 LCT_NORETURN = 3,
2350 LCT_THROW = 4,
2351 LCT_RETURNS_TWICE = 5
2352 };
2353
2354 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2355 ...);
2356 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2357 enum machine_mode, int, ...);
2358
2359 /* In varasm.c */
2360 extern void init_varasm_once (void);
2361 extern enum tls_model decl_default_tls_model (const_tree);
2362
2363 /* In rtl.c */
2364 extern void traverse_md_constants (int (*) (void **, void *), void *);
2365 struct md_constant { char *name, *value; };
2366
2367 /* In read-rtl.c */
2368 extern int read_skip_spaces (FILE *);
2369 extern bool read_rtx (FILE *, rtx *, int *);
2370 extern void copy_rtx_ptr_loc (const void *, const void *);
2371 extern void print_rtx_ptr_loc (const void *);
2372 extern const char *join_c_conditions (const char *, const char *);
2373 extern void print_c_condition (const char *);
2374 extern const char *read_rtx_filename;
2375 extern int read_rtx_lineno;
2376
2377 /* In alias.c */
2378 extern rtx canon_rtx (rtx);
2379 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2380 extern rtx get_addr (rtx);
2381 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2382 rtx, bool (*)(const_rtx, bool));
2383 extern int read_dependence (const_rtx, const_rtx);
2384 extern int anti_dependence (const_rtx, const_rtx);
2385 extern int output_dependence (const_rtx, const_rtx);
2386 extern void init_alias_target (void);
2387 extern void init_alias_analysis (void);
2388 extern void end_alias_analysis (void);
2389 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2390 extern rtx find_base_term (rtx);
2391 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2392 extern rtx get_reg_known_value (unsigned int);
2393 extern bool get_reg_known_equiv_p (unsigned int);
2394
2395 #ifdef STACK_REGS
2396 extern int stack_regs_mentioned (const_rtx insn);
2397 #endif
2398
2399 /* In toplev.c */
2400 extern GTY(()) rtx stack_limit_rtx;
2401
2402 /* In predict.c */
2403 extern void invert_br_probabilities (rtx);
2404 extern bool expensive_function_p (int);
2405 /* In cfgexpand.c */
2406 extern void add_reg_br_prob_note (rtx last, int probability);
2407 extern rtx wrap_constant (enum machine_mode, rtx);
2408 extern rtx unwrap_constant (rtx);
2409
2410 /* In var-tracking.c */
2411 extern unsigned int variable_tracking_main (void);
2412
2413 /* In stor-layout.c. */
2414 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2415 rtx *, rtx *);
2416
2417 /* In loop-unswitch.c */
2418 extern rtx reversed_condition (rtx);
2419 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2420
2421 /* In loop-iv.c */
2422 extern rtx canon_condition (rtx);
2423 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2424
2425 /* In final.c */
2426 extern unsigned int compute_alignments (void);
2427 \f
2428 struct rtl_hooks
2429 {
2430 rtx (*gen_lowpart) (enum machine_mode, rtx);
2431 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2432 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2433 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2434 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2435 unsigned int, unsigned int *);
2436 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2437
2438 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2439 };
2440
2441 /* Each pass can provide its own. */
2442 extern struct rtl_hooks rtl_hooks;
2443
2444 /* ... but then it has to restore these. */
2445 extern const struct rtl_hooks general_rtl_hooks;
2446
2447 /* Keep this for the nonce. */
2448 #define gen_lowpart rtl_hooks.gen_lowpart
2449
2450 extern void insn_locators_alloc (void);
2451 extern void insn_locators_free (void);
2452 extern void insn_locators_finalize (void);
2453 extern void set_curr_insn_source_location (location_t);
2454 extern location_t get_curr_insn_source_location (void);
2455 extern void set_curr_insn_block (tree);
2456 extern tree get_curr_insn_block (void);
2457 extern int curr_insn_locator (void);
2458 extern bool optimize_insn_for_size_p (void);
2459 extern bool optimize_insn_for_speed_p (void);
2460
2461 #endif /* ! GCC_RTL_H */