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Enable dumping of alias graphs.
[official-gcc/Ramakrishna.git] / gcc / rtl.h
blobc5839df4ecb6fe4965d89629f2c68cc5a8b1eeb4
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 #include "statistics.h"
26 #include "machmode.h"
27 #include "input.h"
28 #include "real.h"
29 #include "vec.h"
30 #include "fixed-value.h"
31 #include "alias.h"
32
33 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
34 #undef FLOAT /* Likewise. */
35 #undef ABS /* Likewise. */
36 #undef PC /* Likewise. */
37
38 /* Value used by some passes to "recognize" noop moves as valid
39 instructions. */
40 #define NOOP_MOVE_INSN_CODE INT_MAX
41
42 /* Register Transfer Language EXPRESSIONS CODES */
43
44 #define RTX_CODE enum rtx_code
45 enum rtx_code {
46
47 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
48 #include "rtl.def" /* rtl expressions are documented here */
49 #undef DEF_RTL_EXPR
50
51 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
52 NUM_RTX_CODE.
53 Assumes default enum value assignment. */
54
55 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
56 /* The cast here, saves many elsewhere. */
57
58 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59
60 enum rtx_class {
61 /* We check bit 0-1 of some rtx class codes in the predicates below. */
62
63 /* Bit 0 = comparison if 0, arithmetic is 1
64 Bit 1 = 1 if commutative. */
65 RTX_COMPARE, /* 0 */
66 RTX_COMM_COMPARE,
67 RTX_BIN_ARITH,
68 RTX_COMM_ARITH,
69
70 /* Must follow the four preceding values. */
71 RTX_UNARY, /* 4 */
72
73 RTX_EXTRA,
74 RTX_MATCH,
75 RTX_INSN,
76
77 /* Bit 0 = 1 if constant. */
78 RTX_OBJ, /* 8 */
79 RTX_CONST_OBJ,
80
81 RTX_TERNARY,
82 RTX_BITFIELD_OPS,
83 RTX_AUTOINC
84 };
85
86 #define RTX_OBJ_MASK (~1)
87 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
88 #define RTX_COMPARE_MASK (~1)
89 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
90 #define RTX_ARITHMETIC_MASK (~1)
91 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
92 #define RTX_BINARY_MASK (~3)
93 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
94 #define RTX_COMMUTATIVE_MASK (~2)
95 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
96 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
97
98 extern const unsigned char rtx_length[NUM_RTX_CODE];
99 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
100
101 extern const char * const rtx_name[NUM_RTX_CODE];
102 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
103
104 extern const char * const rtx_format[NUM_RTX_CODE];
105 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
106
107 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
108 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
109
110 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
111 extern const unsigned char rtx_next[NUM_RTX_CODE];
112 \f
113 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
114 relative to which the offsets are calculated, as explained in rtl.def. */
115 typedef struct
116 {
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align: 8;
119 /* Flags: */
120 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
121 unsigned min_after_vec: 1; /* minimum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned max_after_vec: 1; /* maximum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned min_after_base: 1; /* minimum address target label is
126 after BASE. */
127 unsigned max_after_base: 1; /* maximum address target label is
128 after BASE. */
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
131 unsigned : 2;
132 unsigned scale : 8;
133 } addr_diff_vec_flags;
134
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. If any element is nonzero, it means
138 the value of the corresponding attribute is unknown. */
139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
140 while EXPR can describe a larger underlying object, which might have a
141 stricter alignment; OFFSET is the offset of the MEM within that object. */
142 typedef struct GTY(()) mem_attrs
143 {
144 tree expr; /* expr corresponding to MEM. */
145 rtx offset; /* Offset from start of DECL, as CONST_INT. */
146 rtx size; /* Size in bytes, as a CONST_INT. */
147 alias_set_type alias; /* Memory alias set. */
148 unsigned int align; /* Alignment of MEM in bits. */
149 } mem_attrs;
150
151 /* Structure used to describe the attributes of a REG in similar way as
152 mem_attrs does for MEM above. Note that the OFFSET field is calculated
153 in the same way as for mem_attrs, rather than in the same way as a
154 SUBREG_BYTE. For example, if a big-endian target stores a byte
155 object in the low part of a 4-byte register, the OFFSET field
156 will be -3 rather than 0. */
157
158 typedef struct GTY(()) reg_attrs {
159 tree decl; /* decl corresponding to REG. */
160 HOST_WIDE_INT offset; /* Offset from start of DECL. */
161 } reg_attrs;
162
163 /* Common union for an element of an rtx. */
164
165 union rtunion_def
166 {
167 int rt_int;
168 unsigned int rt_uint;
169 const char *rt_str;
170 rtx rt_rtx;
171 rtvec rt_rtvec;
172 enum machine_mode rt_type;
173 addr_diff_vec_flags rt_addr_diff_vec_flags;
174 struct cselib_val_struct *rt_cselib;
175 struct bitmap_head_def *rt_bit;
176 tree rt_tree;
177 struct basic_block_def *rt_bb;
178 mem_attrs *rt_mem;
179 reg_attrs *rt_reg;
180 struct constant_descriptor_rtx *rt_constant;
181 };
182 typedef union rtunion_def rtunion;
183
184 /* This structure remembers the position of a SYMBOL_REF within an
185 object_block structure. A SYMBOL_REF only provides this information
186 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
187 struct GTY(()) block_symbol {
188 /* The usual SYMBOL_REF fields. */
189 rtunion GTY ((skip)) fld[3];
190
191 /* The block that contains this object. */
192 struct object_block *block;
193
194 /* The offset of this object from the start of its block. It is negative
195 if the symbol has not yet been assigned an offset. */
196 HOST_WIDE_INT offset;
197 };
198
199 DEF_VEC_P(rtx);
200 DEF_VEC_ALLOC_P(rtx,heap);
201 DEF_VEC_ALLOC_P(rtx,gc);
202
203 /* Describes a group of objects that are to be placed together in such
204 a way that their relative positions are known. */
205 struct GTY(()) object_block {
206 /* The section in which these objects should be placed. */
207 section *sect;
208
209 /* The alignment of the first object, measured in bits. */
210 unsigned int alignment;
211
212 /* The total size of the objects, measured in bytes. */
213 HOST_WIDE_INT size;
214
215 /* The SYMBOL_REFs for each object. The vector is sorted in
216 order of increasing offset and the following conditions will
217 hold for each element X:
218
219 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
220 !SYMBOL_REF_ANCHOR_P (X)
221 SYMBOL_REF_BLOCK (X) == [address of this structure]
222 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
223 VEC(rtx,gc) *objects;
224
225 /* All the anchor SYMBOL_REFs used to address these objects, sorted
226 in order of increasing offset, and then increasing TLS model.
227 The following conditions will hold for each element X in this vector:
228
229 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
230 SYMBOL_REF_ANCHOR_P (X)
231 SYMBOL_REF_BLOCK (X) == [address of this structure]
232 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
233 VEC(rtx,gc) *anchors;
234 };
235
236 /* RTL expression ("rtx"). */
237
238 struct GTY((chain_next ("RTX_NEXT (&%h)"),
239 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
240 /* The kind of expression this is. */
241 ENUM_BITFIELD(rtx_code) code: 16;
242
243 /* The kind of value the expression has. */
244 ENUM_BITFIELD(machine_mode) mode : 8;
245
246 /* 1 in a MEM if we should keep the alias set for this mem unchanged
247 when we access a component.
248 1 in a CALL_INSN if it is a sibling call.
249 1 in a SET that is for a return.
250 In a CODE_LABEL, part of the two-bit alternate entry field. */
251 unsigned int jump : 1;
252 /* In a CODE_LABEL, part of the two-bit alternate entry field.
253 1 in a MEM if it cannot trap.
254 1 in a CALL_INSN logically equivalent to
255 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
256 unsigned int call : 1;
257 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
258 1 in a SUBREG if it references an unsigned object whose mode has been
259 from a promoted to a wider mode.
260 1 in a SYMBOL_REF if it addresses something in the per-function
261 constants pool.
262 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
263 1 in a NOTE, or EXPR_LIST for a const call.
264 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
265 unsigned int unchanging : 1;
266 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
267 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
268 if it has been deleted.
269 1 in a REG expression if corresponds to a variable declared by the user,
270 0 for an internally generated temporary.
271 1 in a SUBREG with a negative value.
272 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
273 non-local label.
274 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
275 unsigned int volatil : 1;
276 /* 1 in a MEM referring to a field of an aggregate.
277 0 if the MEM was a variable or the result of a * operator in C;
278 1 if it was the result of a . or -> operator (on a struct) in C.
279 1 in a REG if the register is used only in exit code a loop.
280 1 in a SUBREG expression if was generated from a variable with a
281 promoted mode.
282 1 in a CODE_LABEL if the label is used for nonlocal gotos
283 and must not be deleted even if its count is zero.
284 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
285 together with the preceding insn. Valid only within sched.
286 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
287 from the target of a branch. Valid from reorg until end of compilation;
288 cleared before used. */
289 unsigned int in_struct : 1;
290 /* At the end of RTL generation, 1 if this rtx is used. This is used for
291 copying shared structure. See `unshare_all_rtl'.
292 In a REG, this is not needed for that purpose, and used instead
293 in `leaf_renumber_regs_insn'.
294 1 in a SYMBOL_REF, means that emit_library_call
295 has used it as the function. */
296 unsigned int used : 1;
297 /* 1 in an INSN or a SET if this rtx is related to the call frame,
298 either changing how we compute the frame address or saving and
299 restoring registers in the prologue and epilogue.
300 1 in a REG or MEM if it is a pointer.
301 1 in a SYMBOL_REF if it addresses something in the per-function
302 constant string pool. */
303 unsigned frame_related : 1;
304 /* 1 in a REG or PARALLEL that is the current function's return value.
305 1 in a MEM if it refers to a scalar.
306 1 in a SYMBOL_REF for a weak symbol.
307 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
308 unsigned return_val : 1;
309
310 /* The first element of the operands of this rtx.
311 The number of operands and their types are controlled
312 by the `code' field, according to rtl.def. */
313 union u {
314 rtunion fld[1];
315 HOST_WIDE_INT hwint[1];
316 struct block_symbol block_sym;
317 struct real_value rv;
318 struct fixed_value fv;
319 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
320 };
321
322 /* The size in bytes of an rtx header (code, mode and flags). */
323 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
324
325 /* The size in bytes of an rtx with code CODE. */
326 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
327
328 #define NULL_RTX (rtx) 0
329
330 /* The "next" and "previous" RTX, relative to this one. */
331
332 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
333 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
334
335 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
336 */
337 #define RTX_PREV(X) ((INSN_P (X) \
338 || NOTE_P (X) \
339 || BARRIER_P (X) \
340 || LABEL_P (X)) \
341 && PREV_INSN (X) != NULL \
342 && NEXT_INSN (PREV_INSN (X)) == X \
343 ? PREV_INSN (X) : NULL)
344
345 /* Define macros to access the `code' field of the rtx. */
346
347 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
348 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
349
350 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
351 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
352
353 /* RTL vector. These appear inside RTX's when there is a need
354 for a variable number of things. The principle use is inside
355 PARALLEL expressions. */
356
357 struct GTY(()) rtvec_def {
358 int num_elem; /* number of elements */
359 rtx GTY ((length ("%h.num_elem"))) elem[1];
360 };
361
362 #define NULL_RTVEC (rtvec) 0
363
364 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
365 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
366
367 /* Predicate yielding nonzero iff X is an rtx for a register. */
368 #define REG_P(X) (GET_CODE (X) == REG)
369
370 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
371 #define MEM_P(X) (GET_CODE (X) == MEM)
372
373 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
374 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
375
376 /* Predicate yielding nonzero iff X is a label insn. */
377 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
378
379 /* Predicate yielding nonzero iff X is a jump insn. */
380 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
381
382 /* Predicate yielding nonzero iff X is a call insn. */
383 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
384
385 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
386 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
387
388 /* Predicate yielding nonzero iff X is a debug note/insn. */
389 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
390
391 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
392 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
393
394 /* Nonzero if DEBUG_INSN_P may possibly hold. */
395 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
396
397 /* Predicate yielding nonzero iff X is a real insn. */
398 #define INSN_P(X) \
399 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
400
401 /* Predicate yielding nonzero iff X is a note insn. */
402 #define NOTE_P(X) (GET_CODE (X) == NOTE)
403
404 /* Predicate yielding nonzero iff X is a barrier insn. */
405 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
406
407 /* Predicate yielding nonzero iff X is a data for a jump table. */
408 #define JUMP_TABLE_DATA_P(INSN) \
409 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
410 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
411
412 /* 1 if X is a unary operator. */
413
414 #define UNARY_P(X) \
415 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
416
417 /* 1 if X is a binary operator. */
418
419 #define BINARY_P(X) \
420 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
421
422 /* 1 if X is an arithmetic operator. */
423
424 #define ARITHMETIC_P(X) \
425 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
426 == RTX_ARITHMETIC_RESULT)
427
428 /* 1 if X is an arithmetic operator. */
429
430 #define COMMUTATIVE_ARITH_P(X) \
431 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
432
433 /* 1 if X is a commutative arithmetic operator or a comparison operator.
434 These two are sometimes selected together because it is possible to
435 swap the two operands. */
436
437 #define SWAPPABLE_OPERANDS_P(X) \
438 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
439 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
440 | (1 << RTX_COMPARE)))
441
442 /* 1 if X is a non-commutative operator. */
443
444 #define NON_COMMUTATIVE_P(X) \
445 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
446 == RTX_NON_COMMUTATIVE_RESULT)
447
448 /* 1 if X is a commutative operator on integers. */
449
450 #define COMMUTATIVE_P(X) \
451 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
452 == RTX_COMMUTATIVE_RESULT)
453
454 /* 1 if X is a relational operator. */
455
456 #define COMPARISON_P(X) \
457 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
458
459 /* 1 if X is a constant value that is an integer. */
460
461 #define CONSTANT_P(X) \
462 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
463
464 /* 1 if X can be used to represent an object. */
465 #define OBJECT_P(X) \
466 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
467
468 /* General accessor macros for accessing the fields of an rtx. */
469
470 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
471 /* The bit with a star outside the statement expr and an & inside is
472 so that N can be evaluated only once. */
473 #define RTL_CHECK1(RTX, N, C1) __extension__ \
474 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
475 const enum rtx_code _code = GET_CODE (_rtx); \
476 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
477 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
478 __FUNCTION__); \
479 if (GET_RTX_FORMAT(_code)[_n] != C1) \
480 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
481 __FUNCTION__); \
482 &_rtx->u.fld[_n]; }))
483
484 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
485 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
486 const enum rtx_code _code = GET_CODE (_rtx); \
487 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
488 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
489 __FUNCTION__); \
490 if (GET_RTX_FORMAT(_code)[_n] != C1 \
491 && GET_RTX_FORMAT(_code)[_n] != C2) \
492 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
493 __FUNCTION__); \
494 &_rtx->u.fld[_n]; }))
495
496 #define RTL_CHECKC1(RTX, N, C) __extension__ \
497 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
498 if (GET_CODE (_rtx) != (C)) \
499 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
500 __FUNCTION__); \
501 &_rtx->u.fld[_n]; }))
502
503 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
504 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
505 const enum rtx_code _code = GET_CODE (_rtx); \
506 if (_code != (C1) && _code != (C2)) \
507 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
508 __FUNCTION__); \
509 &_rtx->u.fld[_n]; }))
510
511 #define RTVEC_ELT(RTVEC, I) __extension__ \
512 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
513 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
514 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
515 __FUNCTION__); \
516 &_rtvec->elem[_i]; }))
517
518 #define XWINT(RTX, N) __extension__ \
519 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
520 const enum rtx_code _code = GET_CODE (_rtx); \
521 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
522 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
523 __FUNCTION__); \
524 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
525 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
526 __FUNCTION__); \
527 &_rtx->u.hwint[_n]; }))
528
529 #define XCWINT(RTX, N, C) __extension__ \
530 (*({ __typeof (RTX) const _rtx = (RTX); \
531 if (GET_CODE (_rtx) != (C)) \
532 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
533 __FUNCTION__); \
534 &_rtx->u.hwint[N]; }))
535
536 #define XCMWINT(RTX, N, C, M) __extension__ \
537 (*({ __typeof (RTX) const _rtx = (RTX); \
538 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
539 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
540 __LINE__, __FUNCTION__); \
541 &_rtx->u.hwint[N]; }))
542
543 #define XCNMPRV(RTX, C, M) __extension__ \
544 ({ __typeof (RTX) const _rtx = (RTX); \
545 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
546 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
547 __LINE__, __FUNCTION__); \
548 &_rtx->u.rv; })
549
550 #define XCNMPFV(RTX, C, M) __extension__ \
551 ({ __typeof (RTX) const _rtx = (RTX); \
552 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
553 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
554 __LINE__, __FUNCTION__); \
555 &_rtx->u.fv; })
556
557 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
558 ({ __typeof (RTX) const _symbol = (RTX); \
559 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
560 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
561 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
562 __FUNCTION__); \
563 &_symbol->u.block_sym; })
564
565 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
566 const char *)
567 ATTRIBUTE_NORETURN;
568 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
569 const char *)
570 ATTRIBUTE_NORETURN;
571 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
572 int, const char *)
573 ATTRIBUTE_NORETURN;
574 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
575 int, const char *)
576 ATTRIBUTE_NORETURN;
577 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
578 const char *, int, const char *)
579 ATTRIBUTE_NORETURN;
580 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
581 bool, const char *, int, const char *)
582 ATTRIBUTE_NORETURN;
583 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
584 ATTRIBUTE_NORETURN;
585 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
586 const char *)
587 ATTRIBUTE_NORETURN;
588
589 #else /* not ENABLE_RTL_CHECKING */
590
591 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
592 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
593 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
594 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
595 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
596 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
597 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
598 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
599 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
600 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
601 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
602 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
603
604 #endif
605
606 /* General accessor macros for accessing the flags of an rtx. */
607
608 /* Access an individual rtx flag, with no checking of any kind. */
609 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
610
611 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
612 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
613 ({ __typeof (RTX) const _rtx = (RTX); \
614 if (GET_CODE(_rtx) != C1) \
615 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
616 __FUNCTION__); \
617 _rtx; })
618
619 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
620 ({ __typeof (RTX) const _rtx = (RTX); \
621 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
622 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
623 __FUNCTION__); \
624 _rtx; })
625
626 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
627 ({ __typeof (RTX) const _rtx = (RTX); \
628 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
629 && GET_CODE(_rtx) != C3) \
630 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
631 __FUNCTION__); \
632 _rtx; })
633
634 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
635 ({ __typeof (RTX) const _rtx = (RTX); \
636 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
637 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
638 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
639 __FUNCTION__); \
640 _rtx; })
641
642 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
643 ({ __typeof (RTX) const _rtx = (RTX); \
644 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
645 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
646 && GET_CODE(_rtx) != C5) \
647 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
648 __FUNCTION__); \
649 _rtx; })
650
651 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
652 __extension__ \
653 ({ __typeof (RTX) const _rtx = (RTX); \
654 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
655 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
656 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
657 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
658 __FUNCTION__); \
659 _rtx; })
660
661 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
662 __extension__ \
663 ({ __typeof (RTX) const _rtx = (RTX); \
664 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
665 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
666 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
667 && GET_CODE(_rtx) != C7) \
668 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
669 __FUNCTION__); \
670 _rtx; })
671
672 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
673 __extension__ \
674 ({ __typeof (RTX) const _rtx = (RTX); \
675 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
676 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
677 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
678 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
679 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
680 __FUNCTION__); \
681 _rtx; })
682
683 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
684 int, const char *)
685 ATTRIBUTE_NORETURN
686 ;
687
688 #else /* not ENABLE_RTL_FLAG_CHECKING */
689
690 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
691 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
692 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
693 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
694 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
695 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
696 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
697 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
698 #endif
699
700 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
701 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
702 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
703 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
704 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
705 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
706 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
707 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
708 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
709
710 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
711 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
712
713 /* These are like XINT, etc. except that they expect a '0' field instead
714 of the normal type code. */
715
716 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
717 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
718 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
719 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
720 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
721 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
722 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
723 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
724 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
725 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
726 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
727 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
728 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
729 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
730
731 /* Access a '0' field with any type. */
732 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
733
734 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
735 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
736 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
737 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
738 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
739 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
740 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
741 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
742 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
743 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
744
745 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
746 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
747
748 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
749 \f
750 /* ACCESS MACROS for particular fields of insns. */
751
752 /* Holds a unique number for each insn.
753 These are not necessarily sequentially increasing. */
754 #define INSN_UID(INSN) XINT (INSN, 0)
755
756 /* Chain insns together in sequence. */
757 #define PREV_INSN(INSN) XEXP (INSN, 1)
758 #define NEXT_INSN(INSN) XEXP (INSN, 2)
759
760 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
761 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
762 /* LOCATION of an RTX if relevant. */
763 #define RTL_LOCATION(X) (INSN_P (X) ? \
764 locator_location (INSN_LOCATOR (x)) \
765 : UNKNOWN_LOCATION)
766 /* LOCATION of current INSN. */
767 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
768 /* The body of an insn. */
769 #define PATTERN(INSN) XEXP (INSN, 5)
770
771 /* Code number of instruction, from when it was recognized.
772 -1 means this instruction has not been recognized yet. */
773 #define INSN_CODE(INSN) XINT (INSN, 6)
774
775 #define RTX_FRAME_RELATED_P(RTX) \
776 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
777 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
778
779 /* 1 if RTX is an insn that has been deleted. */
780 #define INSN_DELETED_P(RTX) \
781 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
782 CALL_INSN, JUMP_INSN, \
783 CODE_LABEL, BARRIER, NOTE)->volatil)
784
785 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
786 TREE_READONLY. */
787 #define RTL_CONST_CALL_P(RTX) \
788 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
789
790 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
791 DECL_PURE_P. */
792 #define RTL_PURE_CALL_P(RTX) \
793 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
794
795 /* 1 if RTX is a call to a const or pure function. */
796 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
797 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
798
799 /* 1 if RTX is a call to a looping const or pure function. Built from
800 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
801 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
802 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
803
804 /* 1 if RTX is a call_insn for a sibling call. */
805 #define SIBLING_CALL_P(RTX) \
806 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
807
808 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
809 #define INSN_ANNULLED_BRANCH_P(RTX) \
810 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
811
812 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
813 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
814 executed if the branch is taken. For annulled branches with this bit
815 clear, the insn should be executed only if the branch is not taken. */
816 #define INSN_FROM_TARGET_P(RTX) \
817 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
818
819 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
820 See the comments for ADDR_DIFF_VEC in rtl.def. */
821 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
822
823 /* In a VALUE, the value cselib has assigned to RTX.
824 This is a "struct cselib_val_struct", see cselib.h. */
825 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
826
827 /* Holds a list of notes on what this insn does to various REGs.
828 It is a chain of EXPR_LIST rtx's, where the second operand is the
829 chain pointer and the first operand is the REG being described.
830 The mode field of the EXPR_LIST contains not a real machine mode
831 but a value from enum reg_note. */
832 #define REG_NOTES(INSN) XEXP(INSN, 7)
833
834 enum reg_note
835 {
836 #define DEF_REG_NOTE(NAME) NAME,
837 #include "reg-notes.def"
838 #undef DEF_REG_NOTE
839 REG_NOTE_MAX
840 };
841
842 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
843 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
844 #define PUT_REG_NOTE_KIND(LINK, KIND) \
845 PUT_MODE (LINK, (enum machine_mode) (KIND))
846
847 /* Names for REG_NOTE's in EXPR_LIST insn's. */
848
849 extern const char * const reg_note_name[];
850 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
851
852 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
853 USE and CLOBBER expressions.
854 USE expressions list the registers filled with arguments that
855 are passed to the function.
856 CLOBBER expressions document the registers explicitly clobbered
857 by this CALL_INSN.
858 Pseudo registers can not be mentioned in this list. */
859 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
860
861 /* The label-number of a code-label. The assembler label
862 is made from `L' and the label-number printed in decimal.
863 Label numbers are unique in a compilation. */
864 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
865
866 /* In a NOTE that is a line number, this is a string for the file name that the
867 line is in. We use the same field to record block numbers temporarily in
868 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
869 between ints and pointers if we use a different macro for the block number.)
870 */
871
872 /* Opaque data. */
873 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
874 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
875 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
876 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
877 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
878 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
879 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
880
881 /* In a NOTE that is a line number, this is the line number.
882 Other kinds of NOTEs are identified by negative numbers here. */
883 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
884
885 /* Nonzero if INSN is a note marking the beginning of a basic block. */
886 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
887 (GET_CODE (INSN) == NOTE \
888 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
889
890 /* Variable declaration and the location of a variable. */
891 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
892 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
893
894 /* Initialization status of the variable in the location. Status
895 can be unknown, uninitialized or initialized. See enumeration
896 type below. */
897 #define PAT_VAR_LOCATION_STATUS(PAT) \
898 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
899
900 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
901 #define NOTE_VAR_LOCATION_DECL(NOTE) \
902 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
903 #define NOTE_VAR_LOCATION_LOC(NOTE) \
904 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
905 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
906 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
907
908 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
909 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
910
911 /* Accessors for a tree-expanded var location debug insn. */
912 #define INSN_VAR_LOCATION_DECL(INSN) \
913 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
914 #define INSN_VAR_LOCATION_LOC(INSN) \
915 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
916 #define INSN_VAR_LOCATION_STATUS(INSN) \
917 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
918
919 /* Expand to the RTL that denotes an unknown variable location in a
920 DEBUG_INSN. */
921 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
922
923 /* Determine whether X is such an unknown location. */
924 #define VAR_LOC_UNKNOWN_P(X) \
925 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
926
927 /* 1 if RTX is emitted after a call, but it should take effect before
928 the call returns. */
929 #define NOTE_DURING_CALL_P(RTX) \
930 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
931
932 /* Possible initialization status of a variable. When requested
933 by the user, this information is tracked and recorded in the DWARF
934 debug information, along with the variable's location. */
935 enum var_init_status
936 {
937 VAR_INIT_STATUS_UNKNOWN,
938 VAR_INIT_STATUS_UNINITIALIZED,
939 VAR_INIT_STATUS_INITIALIZED
940 };
941
942 /* Codes that appear in the NOTE_KIND field for kinds of notes
943 that are not line numbers. These codes are all negative.
944
945 Notice that we do not try to use zero here for any of
946 the special note codes because sometimes the source line
947 actually can be zero! This happens (for example) when we
948 are generating code for the per-translation-unit constructor
949 and destructor routines for some C++ translation unit. */
950
951 enum insn_note
952 {
953 #define DEF_INSN_NOTE(NAME) NAME,
954 #include "insn-notes.def"
955 #undef DEF_INSN_NOTE
956
957 NOTE_INSN_MAX
958 };
959
960 /* Names for NOTE insn's other than line numbers. */
961
962 extern const char * const note_insn_name[NOTE_INSN_MAX];
963 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
964 (note_insn_name[(NOTE_CODE)])
965
966 /* The name of a label, in case it corresponds to an explicit label
967 in the input source code. */
968 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
969
970 /* In jump.c, each label contains a count of the number
971 of LABEL_REFs that point at it, so unused labels can be deleted. */
972 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
973
974 /* Labels carry a two-bit field composed of the ->jump and ->call
975 bits. This field indicates whether the label is an alternate
976 entry point, and if so, what kind. */
977 enum label_kind
978 {
979 LABEL_NORMAL = 0, /* ordinary label */
980 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
981 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
982 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
983 };
984
985 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
986
987 /* Retrieve the kind of LABEL. */
988 #define LABEL_KIND(LABEL) __extension__ \
989 ({ __typeof (LABEL) const _label = (LABEL); \
990 if (GET_CODE (_label) != CODE_LABEL) \
991 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
992 __FUNCTION__); \
993 (enum label_kind) ((_label->jump << 1) | _label->call); })
994
995 /* Set the kind of LABEL. */
996 #define SET_LABEL_KIND(LABEL, KIND) do { \
997 __typeof (LABEL) const _label = (LABEL); \
998 const unsigned int _kind = (KIND); \
999 if (GET_CODE (_label) != CODE_LABEL) \
1000 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1001 __FUNCTION__); \
1002 _label->jump = ((_kind >> 1) & 1); \
1003 _label->call = (_kind & 1); \
1004 } while (0)
1005
1006 #else
1007
1008 /* Retrieve the kind of LABEL. */
1009 #define LABEL_KIND(LABEL) \
1010 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1011
1012 /* Set the kind of LABEL. */
1013 #define SET_LABEL_KIND(LABEL, KIND) do { \
1014 rtx const _label = (LABEL); \
1015 const unsigned int _kind = (KIND); \
1016 _label->jump = ((_kind >> 1) & 1); \
1017 _label->call = (_kind & 1); \
1018 } while (0)
1019
1020 #endif /* rtl flag checking */
1021
1022 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1023
1024 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1025 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1026 be decremented and possibly the label can be deleted. */
1027 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1028
1029 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1030 goes through all the LABEL_REFs that jump to that label. The chain
1031 eventually winds up at the CODE_LABEL: it is circular. */
1032 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1033 \f
1034 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1035 be used on RHS. Use SET_REGNO to change the value. */
1036 #define REGNO(RTX) (rhs_regno(RTX))
1037 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1038
1039 /* ORIGINAL_REGNO holds the number the register originally had; for a
1040 pseudo register turned into a hard reg this will hold the old pseudo
1041 register number. */
1042 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1043
1044 /* Force the REGNO macro to only be used on the lhs. */
1045 static inline unsigned int
1046 rhs_regno (const_rtx x)
1047 {
1048 return XCUINT (x, 0, REG);
1049 }
1050
1051
1052
1053 /* 1 if RTX is a reg or parallel that is the current function's return
1054 value. */
1055 #define REG_FUNCTION_VALUE_P(RTX) \
1056 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1057
1058 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1059 #define REG_USERVAR_P(RTX) \
1060 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1061
1062 /* 1 if RTX is a reg that holds a pointer value. */
1063 #define REG_POINTER(RTX) \
1064 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1065
1066 /* 1 if RTX is a mem that holds a pointer value. */
1067 #define MEM_POINTER(RTX) \
1068 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1069
1070 /* 1 if the given register REG corresponds to a hard register. */
1071 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1072
1073 /* 1 if the given register number REG_NO corresponds to a hard register. */
1074 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1075
1076 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1077 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1078 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1079
1080 /* For a CONST_DOUBLE:
1081 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1082 low-order word and ..._HIGH the high-order.
1083 For a float, there is a REAL_VALUE_TYPE structure, and
1084 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1085 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1086 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1087 #define CONST_DOUBLE_REAL_VALUE(r) \
1088 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1089
1090 #define CONST_FIXED_VALUE(r) \
1091 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1092 #define CONST_FIXED_VALUE_HIGH(r) \
1093 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1094 #define CONST_FIXED_VALUE_LOW(r) \
1095 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1096
1097 /* For a CONST_VECTOR, return element #n. */
1098 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1099
1100 /* For a CONST_VECTOR, return the number of elements in a vector. */
1101 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1102
1103 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1104 SUBREG_BYTE extracts the byte-number. */
1105
1106 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1107 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1108
1109 /* in rtlanal.c */
1110 /* Return the right cost to give to an operation
1111 to make the cost of the corresponding register-to-register instruction
1112 N times that of a fast register-to-register instruction. */
1113 #define COSTS_N_INSNS(N) ((N) * 4)
1114
1115 /* Maximum cost of an rtl expression. This value has the special meaning
1116 not to use an rtx with this cost under any circumstances. */
1117 #define MAX_COST INT_MAX
1118
1119 extern void init_rtlanal (void);
1120 extern int rtx_cost (rtx, enum rtx_code, bool);
1121 extern int address_cost (rtx, enum machine_mode, bool);
1122 extern unsigned int subreg_lsb (const_rtx);
1123 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1124 unsigned int);
1125 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1126 unsigned int, enum machine_mode);
1127 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1128 unsigned int, enum machine_mode);
1129 extern unsigned int subreg_regno (const_rtx);
1130 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1131 unsigned int, enum machine_mode);
1132 extern unsigned int subreg_nregs (const_rtx);
1133 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1134 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1135 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1136 extern bool constant_pool_constant_p (rtx);
1137 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1138 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1139
1140
1141 /* 1 if RTX is a subreg containing a reg that is already known to be
1142 sign- or zero-extended from the mode of the subreg to the mode of
1143 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1144 extension.
1145
1146 When used as a LHS, is means that this extension must be done
1147 when assigning to SUBREG_REG. */
1148
1149 #define SUBREG_PROMOTED_VAR_P(RTX) \
1150 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1151
1152 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1153 do { \
1154 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1155 if ((VAL) < 0) \
1156 _rtx->volatil = 1; \
1157 else { \
1158 _rtx->volatil = 0; \
1159 _rtx->unchanging = (VAL); \
1160 } \
1161 } while (0)
1162 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1163 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1164 ? -1 : (int) (RTX)->unchanging)
1165
1166 /* Access various components of an ASM_OPERANDS rtx. */
1167
1168 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1169 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1170 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1171 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1172 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1173 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1174 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1175 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1176 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1177 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1178 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1179 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1180 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1181 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1182 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1183
1184 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1185 #define MEM_READONLY_P(RTX) \
1186 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1187
1188 /* 1 if RTX is a mem and we should keep the alias set for this mem
1189 unchanged when we access a component. Set to 1, or example, when we
1190 are already in a non-addressable component of an aggregate. */
1191 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1192 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1193
1194 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1195 #define MEM_VOLATILE_P(RTX) \
1196 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1197 ASM_INPUT)->volatil)
1198
1199 /* 1 if RTX is a mem that refers to an aggregate, either to the
1200 aggregate itself or to a field of the aggregate. If zero, RTX may
1201 or may not be such a reference. */
1202 #define MEM_IN_STRUCT_P(RTX) \
1203 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1204
1205 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1206 not refer to a scalar. */
1207 #define MEM_SCALAR_P(RTX) \
1208 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1209
1210 /* 1 if RTX is a mem that cannot trap. */
1211 #define MEM_NOTRAP_P(RTX) \
1212 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1213
1214 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1215 RTX. Otherwise, vice versa. Use this macro only when you are
1216 *sure* that you know that the MEM is in a structure, or is a
1217 scalar. VAL is evaluated only once. */
1218 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1219 do { \
1220 if (VAL) \
1221 { \
1222 MEM_IN_STRUCT_P (RTX) = 1; \
1223 MEM_SCALAR_P (RTX) = 0; \
1224 } \
1225 else \
1226 { \
1227 MEM_IN_STRUCT_P (RTX) = 0; \
1228 MEM_SCALAR_P (RTX) = 1; \
1229 } \
1230 } while (0)
1231
1232 /* The memory attribute block. We provide access macros for each value
1233 in the block and provide defaults if none specified. */
1234 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1235
1236 /* The register attribute block. We provide access macros for each value
1237 in the block and provide defaults if none specified. */
1238 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1239
1240 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1241 set, and may alias anything. Otherwise, the MEM can only alias
1242 MEMs in a conflicting alias set. This value is set in a
1243 language-dependent manner in the front-end, and should not be
1244 altered in the back-end. These set numbers are tested with
1245 alias_sets_conflict_p. */
1246 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1247
1248 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1249 refer to part of a DECL. It may also be a COMPONENT_REF. */
1250 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1251
1252 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1253 RTX that is always a CONST_INT. */
1254 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1255
1256 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1257 is always a CONST_INT. */
1258 #define MEM_SIZE(RTX) \
1259 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1260 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1261 : 0)
1262
1263 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1264 mode as a default when STRICT_ALIGNMENT, but not if not. */
1265 #define MEM_ALIGN(RTX) \
1266 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1267 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1268 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1269
1270 /* For a REG rtx, the decl it is known to refer to, if it is known to
1271 refer to part of a DECL. */
1272 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1273
1274 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1275 HOST_WIDE_INT. */
1276 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1277
1278 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1279 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1280 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1281 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1282 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1283 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1284 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1285 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1286 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1287 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1288
1289 /* 1 if RTX is a label_ref for a nonlocal label. */
1290 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1291 REG_LABEL_TARGET note. */
1292 #define LABEL_REF_NONLOCAL_P(RTX) \
1293 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1294
1295 /* 1 if RTX is a code_label that should always be considered to be needed. */
1296 #define LABEL_PRESERVE_P(RTX) \
1297 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1298
1299 /* During sched, 1 if RTX is an insn that must be scheduled together
1300 with the preceding insn. */
1301 #define SCHED_GROUP_P(RTX) \
1302 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1303 JUMP_INSN, CALL_INSN \
1304 )->in_struct)
1305
1306 /* For a SET rtx, SET_DEST is the place that is set
1307 and SET_SRC is the value it is set to. */
1308 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1309 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1310 #define SET_IS_RETURN_P(RTX) \
1311 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1312
1313 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1314 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1315 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1316
1317 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1318 conditionally executing the code on, COND_EXEC_CODE is the code
1319 to execute if the condition is true. */
1320 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1321 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1322
1323 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1324 constants pool. */
1325 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1326 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1327
1328 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1329 tree constant pool. This information is private to varasm.c. */
1330 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1331 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1332 (RTX), SYMBOL_REF)->frame_related)
1333
1334 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1335 #define SYMBOL_REF_FLAG(RTX) \
1336 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1337
1338 /* 1 if RTX is a symbol_ref that has been the library function in
1339 emit_library_call. */
1340 #define SYMBOL_REF_USED(RTX) \
1341 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1342
1343 /* 1 if RTX is a symbol_ref for a weak symbol. */
1344 #define SYMBOL_REF_WEAK(RTX) \
1345 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1346
1347 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1348 SYMBOL_REF_CONSTANT. */
1349 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1350
1351 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1352 pool symbol. */
1353 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1354 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1355
1356 /* The tree (decl or constant) associated with the symbol, or null. */
1357 #define SYMBOL_REF_DECL(RTX) \
1358 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1359
1360 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1361 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1362 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1363
1364 /* The rtx constant pool entry for a symbol, or null. */
1365 #define SYMBOL_REF_CONSTANT(RTX) \
1366 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1367
1368 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1369 information derivable from the tree decl associated with this symbol.
1370 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1371 decl. In some cases this is a bug. But beyond that, it's nice to cache
1372 this information to avoid recomputing it. Finally, this allows space for
1373 the target to store more than one bit of information, as with
1374 SYMBOL_REF_FLAG. */
1375 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1376
1377 /* These flags are common enough to be defined for all targets. They
1378 are computed by the default version of targetm.encode_section_info. */
1379
1380 /* Set if this symbol is a function. */
1381 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1382 #define SYMBOL_REF_FUNCTION_P(RTX) \
1383 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1384 /* Set if targetm.binds_local_p is true. */
1385 #define SYMBOL_FLAG_LOCAL (1 << 1)
1386 #define SYMBOL_REF_LOCAL_P(RTX) \
1387 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1388 /* Set if targetm.in_small_data_p is true. */
1389 #define SYMBOL_FLAG_SMALL (1 << 2)
1390 #define SYMBOL_REF_SMALL_P(RTX) \
1391 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1392 /* The three-bit field at [5:3] is true for TLS variables; use
1393 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1394 #define SYMBOL_FLAG_TLS_SHIFT 3
1395 #define SYMBOL_REF_TLS_MODEL(RTX) \
1396 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1397 /* Set if this symbol is not defined in this translation unit. */
1398 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1399 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1400 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1401 /* Set if this symbol has a block_symbol structure associated with it. */
1402 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1403 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1404 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1405 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1406 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1407 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1408 #define SYMBOL_REF_ANCHOR_P(RTX) \
1409 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1410
1411 /* Subsequent bits are available for the target to use. */
1412 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1413 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1414
1415 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1416 structure to which the symbol belongs, or NULL if it has not been
1417 assigned a block. */
1418 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1419
1420 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1421 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1422 RTX has not yet been assigned to a block, or it has not been given an
1423 offset within that block. */
1424 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1425
1426 /* Indicate whether the machine has any sort of auto increment addressing.
1427 If not, we can avoid checking for REG_INC notes. */
1428
1429 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1430 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1431 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1432 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1433 #define AUTO_INC_DEC
1434 #endif
1435
1436 /* Define a macro to look for REG_INC notes,
1437 but save time on machines where they never exist. */
1438
1439 #ifdef AUTO_INC_DEC
1440 #define FIND_REG_INC_NOTE(INSN, REG) \
1441 ((REG) != NULL_RTX && REG_P ((REG)) \
1442 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1443 : find_reg_note ((INSN), REG_INC, (REG)))
1444 #else
1445 #define FIND_REG_INC_NOTE(INSN, REG) 0
1446 #endif
1447
1448 #ifndef HAVE_PRE_INCREMENT
1449 #define HAVE_PRE_INCREMENT 0
1450 #endif
1451
1452 #ifndef HAVE_PRE_DECREMENT
1453 #define HAVE_PRE_DECREMENT 0
1454 #endif
1455
1456 #ifndef HAVE_POST_INCREMENT
1457 #define HAVE_POST_INCREMENT 0
1458 #endif
1459
1460 #ifndef HAVE_POST_DECREMENT
1461 #define HAVE_POST_DECREMENT 0
1462 #endif
1463
1464 #ifndef HAVE_POST_MODIFY_DISP
1465 #define HAVE_POST_MODIFY_DISP 0
1466 #endif
1467
1468 #ifndef HAVE_POST_MODIFY_REG
1469 #define HAVE_POST_MODIFY_REG 0
1470 #endif
1471
1472 #ifndef HAVE_PRE_MODIFY_DISP
1473 #define HAVE_PRE_MODIFY_DISP 0
1474 #endif
1475
1476 #ifndef HAVE_PRE_MODIFY_REG
1477 #define HAVE_PRE_MODIFY_REG 0
1478 #endif
1479
1480
1481 /* Some architectures do not have complete pre/post increment/decrement
1482 instruction sets, or only move some modes efficiently. These macros
1483 allow us to tune autoincrement generation. */
1484
1485 #ifndef USE_LOAD_POST_INCREMENT
1486 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1487 #endif
1488
1489 #ifndef USE_LOAD_POST_DECREMENT
1490 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1491 #endif
1492
1493 #ifndef USE_LOAD_PRE_INCREMENT
1494 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1495 #endif
1496
1497 #ifndef USE_LOAD_PRE_DECREMENT
1498 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1499 #endif
1500
1501 #ifndef USE_STORE_POST_INCREMENT
1502 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1503 #endif
1504
1505 #ifndef USE_STORE_POST_DECREMENT
1506 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1507 #endif
1508
1509 #ifndef USE_STORE_PRE_INCREMENT
1510 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1511 #endif
1512
1513 #ifndef USE_STORE_PRE_DECREMENT
1514 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1515 #endif
1516 \f
1517 /* Nonzero when we are generating CONCATs. */
1518 extern int generating_concat_p;
1519
1520 /* Nonzero when we are expanding trees to RTL. */
1521 extern int currently_expanding_to_rtl;
1522
1523 /* Generally useful functions. */
1524
1525 /* In expmed.c */
1526 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1527
1528 /* In explow.c */
1529 extern void set_stack_check_libfunc (rtx);
1530 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1531 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1532
1533 /* In emit-rtl.c */
1534 extern rtx gen_blockage (void);
1535 extern rtvec gen_rtvec (int, ...);
1536 extern rtx copy_insn_1 (rtx);
1537 extern rtx copy_insn (rtx);
1538 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1539 extern rtx emit_copy_of_insn_after (rtx, rtx);
1540 extern void set_reg_attrs_from_value (rtx, rtx);
1541 extern void set_reg_attrs_for_parm (rtx, rtx);
1542 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1543 extern void adjust_reg_mode (rtx, enum machine_mode);
1544 extern int mem_expr_equal_p (const_tree, const_tree);
1545
1546 /* In rtl.c */
1547 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1548 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1549
1550 extern rtvec rtvec_alloc (int);
1551 extern bool shared_const_p (const_rtx);
1552 extern rtx copy_rtx (rtx);
1553 extern void dump_rtx_statistics (void);
1554
1555 /* In emit-rtl.c */
1556 extern rtx copy_rtx_if_shared (rtx);
1557
1558 /* In rtl.c */
1559 extern unsigned int rtx_size (const_rtx);
1560 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1561 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1562 extern int rtx_equal_p (const_rtx, const_rtx);
1563
1564 /* In emit-rtl.c */
1565 extern rtvec gen_rtvec_v (int, rtx *);
1566 extern rtx gen_reg_rtx (enum machine_mode);
1567 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1568 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1569 extern rtx gen_reg_rtx_and_attrs (rtx);
1570 extern rtx gen_label_rtx (void);
1571 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1572
1573 /* In cse.c */
1574 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1575
1576 /* In emit-rtl.c */
1577 extern rtx gen_highpart (enum machine_mode, rtx);
1578 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1579 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1580
1581 /* In emit-rtl.c */
1582 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1583 extern int subreg_lowpart_p (const_rtx);
1584 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1585 enum machine_mode);
1586 extern unsigned int subreg_highpart_offset (enum machine_mode,
1587 enum machine_mode);
1588 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1589 extern rtx make_safe_from (rtx, rtx);
1590 extern rtx convert_memory_address (enum machine_mode, rtx);
1591 extern rtx get_insns (void);
1592 extern const char *get_insn_name (int);
1593 extern rtx get_last_insn (void);
1594 extern rtx get_last_insn_anywhere (void);
1595 extern rtx get_first_nonnote_insn (void);
1596 extern rtx get_last_nonnote_insn (void);
1597 extern void start_sequence (void);
1598 extern void push_to_sequence (rtx);
1599 extern void push_to_sequence2 (rtx, rtx);
1600 extern void end_sequence (void);
1601 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1602 enum machine_mode);
1603
1604 /* In loop-iv.c */
1605
1606 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1607
1608 /* In varasm.c */
1609 extern rtx force_const_mem (enum machine_mode, rtx);
1610
1611 /* In varasm.c */
1612
1613 struct function;
1614 extern rtx get_pool_constant (rtx);
1615 extern rtx get_pool_constant_mark (rtx, bool *);
1616 extern enum machine_mode get_pool_mode (const_rtx);
1617 extern rtx simplify_subtraction (rtx);
1618
1619 /* In function.c */
1620 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1621 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1622 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1623 extern rtx assign_stack_temp_for_type (enum machine_mode,
1624 HOST_WIDE_INT, int, tree);
1625 extern rtx assign_temp (tree, int, int, int);
1626
1627 /* In emit-rtl.c */
1628 extern rtx emit_insn_before (rtx, rtx);
1629 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1630 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1631 extern rtx emit_jump_insn_before (rtx, rtx);
1632 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1633 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1634 extern rtx emit_call_insn_before (rtx, rtx);
1635 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1636 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1637 extern rtx emit_debug_insn_before (rtx, rtx);
1638 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1639 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1640 extern rtx emit_barrier_before (rtx);
1641 extern rtx emit_label_before (rtx, rtx);
1642 extern rtx emit_note_before (enum insn_note, rtx);
1643 extern rtx emit_insn_after (rtx, rtx);
1644 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1645 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1646 extern rtx emit_jump_insn_after (rtx, rtx);
1647 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1648 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1649 extern rtx emit_call_insn_after (rtx, rtx);
1650 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1651 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1652 extern rtx emit_debug_insn_after (rtx, rtx);
1653 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1654 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1655 extern rtx emit_barrier_after (rtx);
1656 extern rtx emit_label_after (rtx, rtx);
1657 extern rtx emit_note_after (enum insn_note, rtx);
1658 extern rtx emit_insn (rtx);
1659 extern rtx emit_debug_insn (rtx);
1660 extern rtx emit_jump_insn (rtx);
1661 extern rtx emit_call_insn (rtx);
1662 extern rtx emit_label (rtx);
1663 extern rtx emit_barrier (void);
1664 extern rtx emit_note (enum insn_note);
1665 extern rtx emit_note_copy (rtx);
1666 extern rtx gen_clobber (rtx);
1667 extern rtx emit_clobber (rtx);
1668 extern rtx gen_use (rtx);
1669 extern rtx emit_use (rtx);
1670 extern rtx make_insn_raw (rtx);
1671 extern rtx make_debug_insn_raw (rtx);
1672 extern rtx make_jump_insn_raw (rtx);
1673 extern void add_function_usage_to (rtx, rtx);
1674 extern rtx last_call_insn (void);
1675 extern rtx previous_insn (rtx);
1676 extern rtx next_insn (rtx);
1677 extern rtx prev_nonnote_insn (rtx);
1678 extern rtx prev_nonnote_insn_bb (rtx);
1679 extern rtx next_nonnote_insn (rtx);
1680 extern rtx next_nonnote_insn_bb (rtx);
1681 extern rtx prev_nondebug_insn (rtx);
1682 extern rtx next_nondebug_insn (rtx);
1683 extern rtx prev_real_insn (rtx);
1684 extern rtx next_real_insn (rtx);
1685 extern rtx prev_active_insn (rtx);
1686 extern rtx next_active_insn (rtx);
1687 extern int active_insn_p (const_rtx);
1688 extern rtx prev_label (rtx);
1689 extern rtx next_label (rtx);
1690 extern rtx skip_consecutive_labels (rtx);
1691 extern rtx next_cc0_user (rtx);
1692 extern rtx prev_cc0_setter (rtx);
1693
1694 /* In cfglayout.c */
1695 extern int insn_line (const_rtx);
1696 extern const char * insn_file (const_rtx);
1697 extern location_t locator_location (int);
1698 extern int locator_line (int);
1699 extern const char * locator_file (int);
1700 extern bool locator_eq (int, int);
1701 extern int prologue_locator, epilogue_locator;
1702
1703 /* In jump.c */
1704 extern enum rtx_code reverse_condition (enum rtx_code);
1705 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1706 extern enum rtx_code swap_condition (enum rtx_code);
1707 extern enum rtx_code unsigned_condition (enum rtx_code);
1708 extern enum rtx_code signed_condition (enum rtx_code);
1709 extern void mark_jump_label (rtx, rtx, int);
1710 extern unsigned int cleanup_barriers (void);
1711
1712 /* In jump.c */
1713 extern rtx delete_related_insns (rtx);
1714
1715 /* In recog.c */
1716 extern rtx *find_constant_term_loc (rtx *);
1717
1718 /* In emit-rtl.c */
1719 extern rtx try_split (rtx, rtx, int);
1720 extern int split_branch_probability;
1721
1722 /* In unknown file */
1723 extern rtx split_insns (rtx, rtx);
1724
1725 /* In simplify-rtx.c */
1726 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1727 rtx, enum machine_mode);
1728 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1729 enum machine_mode);
1730 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1731 rtx, rtx);
1732 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1733 rtx);
1734 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1735 enum machine_mode, rtx, rtx, rtx);
1736 extern rtx simplify_const_relational_operation (enum rtx_code,
1737 enum machine_mode, rtx, rtx);
1738 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1739 enum machine_mode, rtx, rtx);
1740 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1741 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1742 enum machine_mode);
1743 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1744 enum machine_mode, rtx, rtx, rtx);
1745 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1746 enum machine_mode, rtx, rtx);
1747 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1748 unsigned int);
1749 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1750 unsigned int);
1751 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1752 extern rtx simplify_rtx (const_rtx);
1753 extern rtx avoid_constant_pool_reference (rtx);
1754 extern rtx delegitimize_mem_from_attrs (rtx);
1755 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1756
1757 /* In reginfo.c */
1758 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1759 bool);
1760
1761 /* In emit-rtl.c */
1762 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1763 extern void set_insn_deleted (rtx);
1764
1765 /* Functions in rtlanal.c */
1766
1767 /* Single set is implemented as macro for performance reasons. */
1768 #define single_set(I) (INSN_P (I) \
1769 ? (GET_CODE (PATTERN (I)) == SET \
1770 ? PATTERN (I) : single_set_1 (I)) \
1771 : NULL_RTX)
1772 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1773
1774 /* Structure used for passing data to REPLACE_LABEL. */
1775 typedef struct replace_label_data
1776 {
1777 rtx r1;
1778 rtx r2;
1779 bool update_label_nuses;
1780 } replace_label_data;
1781
1782 extern int rtx_addr_can_trap_p (const_rtx);
1783 extern bool nonzero_address_p (const_rtx);
1784 extern int rtx_unstable_p (const_rtx);
1785 extern bool rtx_varies_p (const_rtx, bool);
1786 extern bool rtx_addr_varies_p (const_rtx, bool);
1787 extern HOST_WIDE_INT get_integer_term (const_rtx);
1788 extern rtx get_related_value (const_rtx);
1789 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1790 extern void split_const (rtx, rtx *, rtx *);
1791 extern int reg_mentioned_p (const_rtx, const_rtx);
1792 extern int count_occurrences (const_rtx, const_rtx, int);
1793 extern int reg_referenced_p (const_rtx, const_rtx);
1794 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1795 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1796 extern int commutative_operand_precedence (rtx);
1797 extern bool swap_commutative_operands_p (rtx, rtx);
1798 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1799 extern int no_labels_between_p (const_rtx, const_rtx);
1800 extern int modified_in_p (const_rtx, const_rtx);
1801 extern int reg_set_p (const_rtx, const_rtx);
1802 extern rtx single_set_2 (const_rtx, const_rtx);
1803 extern int multiple_sets (const_rtx);
1804 extern int set_noop_p (const_rtx);
1805 extern int noop_move_p (const_rtx);
1806 extern rtx find_last_value (rtx, rtx *, rtx, int);
1807 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1808 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1809 extern const_rtx set_of (const_rtx, const_rtx);
1810 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1811 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1812 extern int dead_or_set_p (const_rtx, const_rtx);
1813 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1814 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1815 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1816 extern rtx find_reg_equal_equiv_note (const_rtx);
1817 extern rtx find_constant_src (const_rtx);
1818 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1819 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1820 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1821 extern void add_reg_note (rtx, enum reg_note, rtx);
1822 extern void remove_note (rtx, const_rtx);
1823 extern void remove_reg_equal_equiv_notes (rtx);
1824 extern int side_effects_p (const_rtx);
1825 extern int volatile_refs_p (const_rtx);
1826 extern int volatile_insn_p (const_rtx);
1827 extern int may_trap_p_1 (const_rtx, unsigned);
1828 extern int may_trap_p (const_rtx);
1829 extern int may_trap_or_fault_p (const_rtx);
1830 extern int inequality_comparisons_p (const_rtx);
1831 extern rtx replace_rtx (rtx, rtx, rtx);
1832 extern int replace_label (rtx *, void *);
1833 extern int rtx_referenced_p (rtx, rtx);
1834 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1835 extern int computed_jump_p (const_rtx);
1836
1837 typedef int (*rtx_function) (rtx *, void *);
1838 extern int for_each_rtx (rtx *, rtx_function, void *);
1839
1840 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1841 rtx *, rtx *);
1842 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1843 rtx_equal_p_callback_function);
1844
1845 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1846 enum machine_mode *);
1847 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1848 bool, hash_rtx_callback_function);
1849
1850 extern rtx regno_use_in (unsigned int, rtx);
1851 extern int auto_inc_p (const_rtx);
1852 extern int in_expr_list_p (const_rtx, const_rtx);
1853 extern void remove_node_from_expr_list (const_rtx, rtx *);
1854 extern int loc_mentioned_in_p (rtx *, const_rtx);
1855 extern rtx find_first_parameter_load (rtx, rtx);
1856 extern bool keep_with_call_p (const_rtx);
1857 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1858 extern int insn_rtx_cost (rtx, bool);
1859
1860 /* Given an insn and condition, return a canonical description of
1861 the test being made. */
1862 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1863
1864 /* Given a JUMP_INSN, return a canonical description of the test
1865 being made. */
1866 extern rtx get_condition (rtx, rtx *, int, int);
1867
1868 /* Information about a subreg of a hard register. */
1869 struct subreg_info
1870 {
1871 /* Offset of first hard register involved in the subreg. */
1872 int offset;
1873 /* Number of hard registers involved in the subreg. */
1874 int nregs;
1875 /* Whether this subreg can be represented as a hard reg with the new
1876 mode. */
1877 bool representable_p;
1878 };
1879
1880 extern void subreg_get_info (unsigned int, enum machine_mode,
1881 unsigned int, enum machine_mode,
1882 struct subreg_info *);
1883
1884 /* lists.c */
1885
1886 extern void free_EXPR_LIST_list (rtx *);
1887 extern void free_INSN_LIST_list (rtx *);
1888 extern void free_EXPR_LIST_node (rtx);
1889 extern void free_INSN_LIST_node (rtx);
1890 extern rtx alloc_INSN_LIST (rtx, rtx);
1891 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1892 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1893 extern rtx remove_list_elem (rtx, rtx *);
1894 extern rtx remove_free_INSN_LIST_node (rtx *);
1895 extern rtx remove_free_EXPR_LIST_node (rtx *);
1896
1897
1898 /* reginfo.c */
1899
1900 /* Initialize may_move_cost and friends for mode M. */
1901 extern void init_move_cost (enum machine_mode);
1902 /* Resize reg info. */
1903 extern bool resize_reg_info (void);
1904 /* Free up register info memory. */
1905 extern void free_reg_info (void);
1906
1907 /* recog.c */
1908 extern int asm_noperands (const_rtx);
1909 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1910 enum machine_mode *, location_t *);
1911
1912 extern enum reg_class reg_preferred_class (int);
1913 extern enum reg_class reg_alternate_class (int);
1914 extern enum reg_class reg_cover_class (int);
1915 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1916 enum reg_class);
1917
1918 extern void split_all_insns (void);
1919 extern unsigned int split_all_insns_noflow (void);
1920
1921 #define MAX_SAVED_CONST_INT 64
1922 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1923
1924 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1925 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1926 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1927 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1928 extern GTY(()) rtx const_true_rtx;
1929
1930 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1931
1932 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1933 same as VOIDmode. */
1934
1935 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1936
1937 /* Likewise, for the constants 1 and 2. */
1938
1939 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1940 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1941
1942 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1943 is used to represent the frame pointer. This is because the
1944 hard frame pointer and the automatic variables are separated by an amount
1945 that cannot be determined until after register allocation. We can assume
1946 that in this case ELIMINABLE_REGS will be defined, one action of which
1947 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1948 #ifndef HARD_FRAME_POINTER_REGNUM
1949 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1950 #endif
1951
1952 /* Index labels for global_rtl. */
1953 enum global_rtl_index
1954 {
1955 GR_PC,
1956 GR_CC0,
1957 GR_STACK_POINTER,
1958 GR_FRAME_POINTER,
1959 /* For register elimination to work properly these hard_frame_pointer_rtx,
1960 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1961 the same register. */
1962 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1963 GR_ARG_POINTER = GR_FRAME_POINTER,
1964 #endif
1965 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1966 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1967 #else
1968 GR_HARD_FRAME_POINTER,
1969 #endif
1970 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1971 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1972 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1973 #else
1974 GR_ARG_POINTER,
1975 #endif
1976 #endif
1977 GR_VIRTUAL_INCOMING_ARGS,
1978 GR_VIRTUAL_STACK_ARGS,
1979 GR_VIRTUAL_STACK_DYNAMIC,
1980 GR_VIRTUAL_OUTGOING_ARGS,
1981 GR_VIRTUAL_CFA,
1982
1983 GR_MAX
1984 };
1985
1986 /* Pointers to standard pieces of rtx are stored here. */
1987 extern GTY(()) rtx global_rtl[GR_MAX];
1988
1989 /* Standard pieces of rtx, to be substituted directly into things. */
1990 #define pc_rtx (global_rtl[GR_PC])
1991 #define cc0_rtx (global_rtl[GR_CC0])
1992
1993 /* All references to certain hard regs, except those created
1994 by allocating pseudo regs into them (when that's possible),
1995 go through these unique rtx objects. */
1996 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1997 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1998 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1999 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2000
2001 extern GTY(()) rtx pic_offset_table_rtx;
2002 extern GTY(()) rtx static_chain_rtx;
2003 extern GTY(()) rtx static_chain_incoming_rtx;
2004 extern GTY(()) rtx return_address_pointer_rtx;
2005
2006 /* Include the RTL generation functions. */
2007
2008 #ifndef GENERATOR_FILE
2009 #include "genrtl.h"
2010 #undef gen_rtx_ASM_INPUT
2011 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2012 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2013 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2014 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2015 #endif
2016
2017 /* There are some RTL codes that require special attention; the
2018 generation functions included above do the raw handling. If you
2019 add to this list, modify special_rtx in gengenrtl.c as well. */
2020
2021 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2022 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2023 extern rtx gen_raw_REG (enum machine_mode, int);
2024 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2025 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2026 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2027
2028 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2029
2030 /* Virtual registers are used during RTL generation to refer to locations into
2031 the stack frame when the actual location isn't known until RTL generation
2032 is complete. The routine instantiate_virtual_regs replaces these with
2033 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2034 a constant. */
2035
2036 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2037
2038 /* This points to the first word of the incoming arguments passed on the stack,
2039 either by the caller or by the callee when pretending it was passed by the
2040 caller. */
2041
2042 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2043
2044 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2045
2046 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2047 variable on the stack. Otherwise, it points to the first variable on
2048 the stack. */
2049
2050 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2051
2052 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2053
2054 /* This points to the location of dynamically-allocated memory on the stack
2055 immediately after the stack pointer has been adjusted by the amount
2056 desired. */
2057
2058 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2059
2060 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2061
2062 /* This points to the location in the stack at which outgoing arguments should
2063 be written when the stack is pre-pushed (arguments pushed using push
2064 insns always use sp). */
2065
2066 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2067
2068 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2069
2070 /* This points to the Canonical Frame Address of the function. This
2071 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2072 but is calculated relative to the arg pointer for simplicity; the
2073 frame pointer nor stack pointer are necessarily fixed relative to
2074 the CFA until after reload. */
2075
2076 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2077
2078 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2079
2080 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2081
2082 /* Nonzero if REGNUM is a pointer into the stack frame. */
2083 #define REGNO_PTR_FRAME_P(REGNUM) \
2084 ((REGNUM) == STACK_POINTER_REGNUM \
2085 || (REGNUM) == FRAME_POINTER_REGNUM \
2086 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2087 || (REGNUM) == ARG_POINTER_REGNUM \
2088 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2089 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2090
2091 /* REGNUM never really appearing in the INSN stream. */
2092 #define INVALID_REGNUM (~(unsigned int) 0)
2093
2094 extern rtx output_constant_def (tree, int);
2095 extern rtx lookup_constant_def (tree);
2096
2097 /* Nonzero after end of reload pass.
2098 Set to 1 or 0 by reload1.c. */
2099
2100 extern int reload_completed;
2101
2102 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2103 extern int epilogue_completed;
2104
2105 /* Set to 1 while reload_as_needed is operating.
2106 Required by some machines to handle any generated moves differently. */
2107
2108 extern int reload_in_progress;
2109
2110 /* This macro indicates whether you may create a new
2111 pseudo-register. */
2112
2113 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2114
2115 #ifdef STACK_REGS
2116 /* Nonzero after end of regstack pass.
2117 Set to 1 or 0 by reg-stack.c. */
2118 extern int regstack_completed;
2119 #endif
2120
2121 /* If this is nonzero, we do not bother generating VOLATILE
2122 around volatile memory references, and we are willing to
2123 output indirect addresses. If cse is to follow, we reject
2124 indirect addresses so a useful potential cse is generated;
2125 if it is used only once, instruction combination will produce
2126 the same indirect address eventually. */
2127 extern int cse_not_expected;
2128
2129 /* Translates rtx code to tree code, for those codes needed by
2130 REAL_ARITHMETIC. The function returns an int because the caller may not
2131 know what `enum tree_code' means. */
2132
2133 extern int rtx_to_tree_code (enum rtx_code);
2134
2135 /* In cse.c */
2136 extern int delete_trivially_dead_insns (rtx, int);
2137 extern int cse_main (rtx, int);
2138 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2139 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2140
2141 /* In jump.c */
2142 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2143 extern int condjump_p (const_rtx);
2144 extern int any_condjump_p (const_rtx);
2145 extern int any_uncondjump_p (const_rtx);
2146 extern rtx pc_set (const_rtx);
2147 extern rtx condjump_label (const_rtx);
2148 extern int simplejump_p (const_rtx);
2149 extern int returnjump_p (rtx);
2150 extern int eh_returnjump_p (rtx);
2151 extern int onlyjump_p (const_rtx);
2152 extern int only_sets_cc0_p (const_rtx);
2153 extern int sets_cc0_p (const_rtx);
2154 extern int invert_jump_1 (rtx, rtx);
2155 extern int invert_jump (rtx, rtx, int);
2156 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2157 extern int true_regnum (const_rtx);
2158 extern unsigned int reg_or_subregno (const_rtx);
2159 extern int redirect_jump_1 (rtx, rtx);
2160 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2161 extern int redirect_jump (rtx, rtx, int);
2162 extern void rebuild_jump_labels (rtx);
2163 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2164 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2165 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2166 const_rtx, const_rtx);
2167 extern void delete_for_peephole (rtx, rtx);
2168 extern int condjump_in_parallel_p (const_rtx);
2169
2170 /* In emit-rtl.c. */
2171 extern int max_reg_num (void);
2172 extern int max_label_num (void);
2173 extern int get_first_label_num (void);
2174 extern void maybe_set_first_label_num (rtx);
2175 extern void delete_insns_since (rtx);
2176 extern void mark_reg_pointer (rtx, int);
2177 extern void mark_user_reg (rtx);
2178 extern void reset_used_flags (rtx);
2179 extern void set_used_flags (rtx);
2180 extern void reorder_insns (rtx, rtx, rtx);
2181 extern void reorder_insns_nobb (rtx, rtx, rtx);
2182 extern int get_max_uid (void);
2183 extern int get_max_insn_count (void);
2184 extern int in_sequence_p (void);
2185 extern void force_next_line_note (void);
2186 extern void init_emit (void);
2187 extern void init_emit_regs (void);
2188 extern void init_emit_once (int);
2189 extern void push_topmost_sequence (void);
2190 extern void pop_topmost_sequence (void);
2191 extern void set_new_first_and_last_insn (rtx, rtx);
2192 extern unsigned int unshare_all_rtl (void);
2193 extern void unshare_all_rtl_again (rtx);
2194 extern void unshare_all_rtl_in_chain (rtx);
2195 extern void verify_rtl_sharing (void);
2196 extern void set_first_insn (rtx);
2197 extern void set_last_insn (rtx);
2198 extern void link_cc0_insns (rtx);
2199 extern void add_insn (rtx);
2200 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2201 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2202 extern void remove_insn (rtx);
2203 extern rtx emit (rtx);
2204 extern rtx delete_insn (rtx);
2205 extern rtx entry_of_function (void);
2206 extern void emit_insn_at_entry (rtx);
2207 extern void delete_insn_chain (rtx, rtx, bool);
2208 extern rtx unlink_insn_chain (rtx, rtx);
2209 extern rtx delete_insn_and_edges (rtx);
2210 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2211 extern rtx gen_const_mem (enum machine_mode, rtx);
2212 extern rtx gen_frame_mem (enum machine_mode, rtx);
2213 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2214 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2215 const_rtx, unsigned int);
2216
2217 /* In combine.c */
2218 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2219 extern rtx remove_death (unsigned int, rtx);
2220 extern void dump_combine_stats (FILE *);
2221 extern void dump_combine_total_stats (FILE *);
2222
2223 /* In cfgcleanup.c */
2224 extern void delete_dead_jumptables (void);
2225
2226 /* In sched-vis.c. */
2227 extern void debug_bb_n_slim (int);
2228 extern void debug_bb_slim (struct basic_block_def *);
2229 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2230 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2231 extern void dump_insn_slim (FILE *f, rtx x);
2232 extern void debug_insn_slim (rtx x);
2233
2234 /* In sched-rgn.c. */
2235 extern void schedule_insns (void);
2236
2237 /* In sched-ebb.c. */
2238 extern void schedule_ebbs (void);
2239
2240 /* In haifa-sched.c. */
2241 extern void fix_sched_param (const char *, const char *);
2242
2243 /* In sel-sched-dump.c. */
2244 extern void sel_sched_fix_param (const char *param, const char *val);
2245
2246 /* In print-rtl.c */
2247 extern const char *print_rtx_head;
2248 extern void debug_rtx (const_rtx);
2249 extern void debug_rtx_list (const_rtx, int);
2250 extern void debug_rtx_range (const_rtx, const_rtx);
2251 extern const_rtx debug_rtx_find (const_rtx, int);
2252 extern void print_mem_expr (FILE *, const_tree);
2253 extern void print_rtl (FILE *, const_rtx);
2254 extern void print_simple_rtl (FILE *, const_rtx);
2255 extern int print_rtl_single (FILE *, const_rtx);
2256 extern void print_inline_rtx (FILE *, const_rtx, int);
2257
2258 /* In function.c */
2259 extern void reposition_prologue_and_epilogue_notes (void);
2260 extern int prologue_epilogue_contains (const_rtx);
2261 extern int sibcall_epilogue_contains (const_rtx);
2262 extern void mark_temp_addr_taken (rtx);
2263 extern void update_temp_slot_address (rtx, rtx);
2264 extern void maybe_copy_epilogue_insn (rtx, rtx);
2265
2266 /* In stmt.c */
2267 extern void expand_null_return (void);
2268 extern void expand_naked_return (void);
2269 extern void emit_jump (rtx);
2270
2271 /* In expr.c */
2272 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2273 unsigned int, int);
2274
2275 /* In cfgrtl.c */
2276 extern void print_rtl_with_bb (FILE *, const_rtx);
2277
2278 /* In cfg.c. */
2279 extern void dump_reg_info (FILE *);
2280 extern void dump_flow_info (FILE *, int);
2281
2282 /* In expmed.c */
2283 extern void init_expmed (void);
2284 extern void expand_inc (rtx, rtx);
2285 extern void expand_dec (rtx, rtx);
2286
2287 /* In gcse.c */
2288 extern bool can_copy_p (enum machine_mode);
2289 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2290 extern rtx fis_get_condition (rtx);
2291
2292 /* In ira.c */
2293 #ifdef HARD_CONST
2294 extern HARD_REG_SET eliminable_regset;
2295 #endif
2296 extern void mark_elimination (int, int);
2297
2298 /* In reginfo.c */
2299 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2300 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2301 extern void globalize_reg (int);
2302 extern void init_reg_modes_target (void);
2303 extern void init_regs (void);
2304 extern void reinit_regs (void);
2305 extern void init_fake_stack_mems (void);
2306 extern void save_register_info (void);
2307 extern void init_reg_sets (void);
2308 extern void regclass (rtx, int);
2309 extern void reg_scan (rtx, unsigned int);
2310 extern void fix_register (const char *, int, int);
2311 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2312 enum machine_mode);
2313
2314 /* In reorg.c */
2315 extern void dbr_schedule (rtx);
2316
2317 /* In reload1.c */
2318 extern int function_invariant_p (const_rtx);
2319
2320 /* In calls.c */
2321 enum libcall_type
2322 {
2323 LCT_NORMAL = 0,
2324 LCT_CONST = 1,
2325 LCT_PURE = 2,
2326 LCT_NORETURN = 3,
2327 LCT_THROW = 4,
2328 LCT_RETURNS_TWICE = 5
2329 };
2330
2331 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2332 ...);
2333 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2334 enum machine_mode, int, ...);
2335
2336 /* In varasm.c */
2337 extern void init_varasm_once (void);
2338 extern enum tls_model decl_default_tls_model (const_tree);
2339
2340 /* In rtl.c */
2341 extern void traverse_md_constants (int (*) (void **, void *), void *);
2342 struct md_constant { char *name, *value; };
2343
2344 /* In read-rtl.c */
2345 extern int read_skip_spaces (FILE *);
2346 extern bool read_rtx (FILE *, rtx *, int *);
2347 extern void copy_rtx_ptr_loc (const void *, const void *);
2348 extern void print_rtx_ptr_loc (const void *);
2349 extern const char *join_c_conditions (const char *, const char *);
2350 extern void print_c_condition (const char *);
2351 extern const char *read_rtx_filename;
2352 extern int read_rtx_lineno;
2353
2354 /* In alias.c */
2355 extern rtx canon_rtx (rtx);
2356 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2357 extern rtx get_addr (rtx);
2358 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2359 rtx, bool (*)(const_rtx, bool));
2360 extern int read_dependence (const_rtx, const_rtx);
2361 extern int anti_dependence (const_rtx, const_rtx);
2362 extern int output_dependence (const_rtx, const_rtx);
2363 extern void init_alias_target (void);
2364 extern void init_alias_analysis (void);
2365 extern void end_alias_analysis (void);
2366 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2367 extern rtx find_base_term (rtx);
2368 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2369 extern rtx get_reg_known_value (unsigned int);
2370 extern bool get_reg_known_equiv_p (unsigned int);
2371
2372 #ifdef STACK_REGS
2373 extern int stack_regs_mentioned (const_rtx insn);
2374 #endif
2375
2376 /* In toplev.c */
2377 extern GTY(()) rtx stack_limit_rtx;
2378
2379 /* In predict.c */
2380 extern void invert_br_probabilities (rtx);
2381 extern bool expensive_function_p (int);
2382 /* In cfgexpand.c */
2383 extern void add_reg_br_prob_note (rtx last, int probability);
2384 extern rtx wrap_constant (enum machine_mode, rtx);
2385 extern rtx unwrap_constant (rtx);
2386
2387 /* In var-tracking.c */
2388 extern unsigned int variable_tracking_main (void);
2389
2390 /* In stor-layout.c. */
2391 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2392 rtx *, rtx *);
2393
2394 /* In loop-unswitch.c */
2395 extern rtx reversed_condition (rtx);
2396 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2397
2398 /* In loop-iv.c */
2399 extern rtx canon_condition (rtx);
2400 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2401
2402 /* In final.c */
2403 extern unsigned int compute_alignments (void);
2404 \f
2405 struct rtl_hooks
2406 {
2407 rtx (*gen_lowpart) (enum machine_mode, rtx);
2408 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2409 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2410 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2411 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2412 unsigned int, unsigned int *);
2413 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2414
2415 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2416 };
2417
2418 /* Each pass can provide its own. */
2419 extern struct rtl_hooks rtl_hooks;
2420
2421 /* ... but then it has to restore these. */
2422 extern const struct rtl_hooks general_rtl_hooks;
2423
2424 /* Keep this for the nonce. */
2425 #define gen_lowpart rtl_hooks.gen_lowpart
2426
2427 extern void insn_locators_alloc (void);
2428 extern void insn_locators_free (void);
2429 extern void insn_locators_finalize (void);
2430 extern void set_curr_insn_source_location (location_t);
2431 extern location_t get_curr_insn_source_location (void);
2432 extern void set_curr_insn_block (tree);
2433 extern tree get_curr_insn_block (void);
2434 extern int curr_insn_locator (void);
2435 extern bool optimize_insn_for_size_p (void);
2436 extern bool optimize_insn_for_speed_p (void);
2437
2438 #endif /* ! GCC_RTL_H */
Sandbox for GRAPHITE tests