?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* cp-objcp-common.c (cp_expr_size): Return NULL in the case
[official-gcc.git] / gcc / rtl.h
blob54dad700087ab14ec384b2de4daaf26eaf54463a
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 Free Software Foundation, Inc.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
20 02110-1301, USA. */
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
31 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
32 #undef FLOAT /* Likewise. */
33 #undef ABS /* Likewise. */
34 #undef PC /* Likewise. */
35
36 /* Value used by some passes to "recognize" noop moves as valid
37 instructions. */
38 #define NOOP_MOVE_INSN_CODE INT_MAX
39
40 /* Register Transfer Language EXPRESSIONS CODES */
41
42 #define RTX_CODE enum rtx_code
43 enum rtx_code {
44
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
46 #include "rtl.def" /* rtl expressions are documented here */
47 #undef DEF_RTL_EXPR
48
49 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
50 NUM_RTX_CODE.
51 Assumes default enum value assignment. */
52
53 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
54 /* The cast here, saves many elsewhere. */
55
56 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
57
58 enum rtx_class {
59 /* We check bit 0-1 of some rtx class codes in the predicates below. */
60
61 /* Bit 0 = comparison if 0, arithmetic is 1
62 Bit 1 = 1 if commutative. */
63 RTX_COMPARE, /* 0 */
64 RTX_COMM_COMPARE,
65 RTX_BIN_ARITH,
66 RTX_COMM_ARITH,
67
68 /* Must follow the four preceding values. */
69 RTX_UNARY, /* 4 */
70
71 RTX_EXTRA,
72 RTX_MATCH,
73 RTX_INSN,
74
75 /* Bit 0 = 1 if constant. */
76 RTX_OBJ, /* 8 */
77 RTX_CONST_OBJ,
78
79 RTX_TERNARY,
80 RTX_BITFIELD_OPS,
81 RTX_AUTOINC
82 };
83
84 #define RTX_OBJ_MASK (~1)
85 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
86 #define RTX_COMPARE_MASK (~1)
87 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
88 #define RTX_ARITHMETIC_MASK (~1)
89 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
90 #define RTX_BINARY_MASK (~3)
91 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
92 #define RTX_COMMUTATIVE_MASK (~2)
93 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
94 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
95
96 extern const unsigned char rtx_length[NUM_RTX_CODE];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
98
99 extern const char * const rtx_name[NUM_RTX_CODE];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
101
102 extern const char * const rtx_format[NUM_RTX_CODE];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
104
105 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
107
108 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
109 extern const unsigned char rtx_next[NUM_RTX_CODE];
110 \f
111 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
112 relative to which the offsets are calculated, as explained in rtl.def. */
113 typedef struct
114 {
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align: 8;
117 /* Flags: */
118 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
119 unsigned min_after_vec: 1; /* minimum address target label is
120 after the ADDR_DIFF_VEC. */
121 unsigned max_after_vec: 1; /* maximum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned min_after_base: 1; /* minimum address target label is
124 after BASE. */
125 unsigned max_after_base: 1; /* maximum address target label is
126 after BASE. */
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
129 unsigned : 2;
130 unsigned scale : 8;
131 } addr_diff_vec_flags;
132
133 /* Structure used to describe the attributes of a MEM. These are hashed
134 so MEMs that the same attributes share a data structure. This means
135 they cannot be modified in place. If any element is nonzero, it means
136 the value of the corresponding attribute is unknown. */
137 /* ALIGN and SIZE are the alignment and size of the MEM itself,
138 while EXPR can describe a larger underlying object, which might have a
139 stricter alignment; OFFSET is the offset of the MEM within that object. */
140 typedef struct mem_attrs GTY(())
141 {
142 HOST_WIDE_INT alias; /* Memory alias set. */
143 tree expr; /* expr corresponding to MEM. */
144 rtx offset; /* Offset from start of DECL, as CONST_INT. */
145 rtx size; /* Size in bytes, as a CONST_INT. */
146 unsigned int align; /* Alignment of MEM in bits. */
147 } mem_attrs;
148
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
151
152 typedef struct reg_attrs GTY(())
153 {
154 tree decl; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset; /* Offset from start of DECL. */
156 } reg_attrs;
157
158 /* Common union for an element of an rtx. */
159
160 union rtunion_def
161 {
162 int rt_int;
163 unsigned int rt_uint;
164 const char *rt_str;
165 rtx rt_rtx;
166 rtvec rt_rtvec;
167 enum machine_mode rt_type;
168 addr_diff_vec_flags rt_addr_diff_vec_flags;
169 struct cselib_val_struct *rt_cselib;
170 struct bitmap_head_def *rt_bit;
171 tree rt_tree;
172 struct basic_block_def *rt_bb;
173 mem_attrs *rt_mem;
174 reg_attrs *rt_reg;
175 struct constant_descriptor_rtx *rt_constant;
176 };
177 typedef union rtunion_def rtunion;
178
179 /* This structure remembers the position of a SYMBOL_REF within an
180 object_block structure. A SYMBOL_REF only provides this information
181 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
182 struct block_symbol GTY(()) {
183 /* The usual SYMBOL_REF fields. */
184 rtunion GTY ((skip)) fld[3];
185
186 /* The block that contains this object. */
187 struct object_block *block;
188
189 /* The offset of this object from the start of its block. It is negative
190 if the symbol has not yet been assigned an offset. */
191 HOST_WIDE_INT offset;
192 };
193
194 DEF_VEC_P(rtx);
195 DEF_VEC_ALLOC_P(rtx,heap);
196 DEF_VEC_ALLOC_P(rtx,gc);
197
198 /* Describes a group of objects that are to be placed together in such
199 a way that their relative positions are known. */
200 struct object_block GTY(())
201 {
202 /* The section in which these objects should be placed. */
203 section *sect;
204
205 /* The alignment of the first object, measured in bits. */
206 unsigned int alignment;
207
208 /* The total size of the objects, measured in bytes. */
209 HOST_WIDE_INT size;
210
211 /* The SYMBOL_REFs for each object. The vector is sorted in
212 order of increasing offset and the following conditions will
213 hold for each element X:
214
215 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
216 !SYMBOL_REF_ANCHOR_P (X)
217 SYMBOL_REF_BLOCK (X) == [address of this structure]
218 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
219 VEC(rtx,gc) *objects;
220
221 /* All the anchor SYMBOL_REFs used to address these objects, sorted
222 in order of increasing offset, and then increasing TLS model.
223 The following conditions will hold for each element X in this vector:
224
225 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
226 SYMBOL_REF_ANCHOR_P (X)
227 SYMBOL_REF_BLOCK (X) == [address of this structure]
228 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
229 VEC(rtx,gc) *anchors;
230 };
231
232 /* RTL expression ("rtx"). */
233
234 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
235 chain_prev ("RTX_PREV (&%h)")))
236 {
237 /* The kind of expression this is. */
238 ENUM_BITFIELD(rtx_code) code: 16;
239
240 /* The kind of value the expression has. */
241 ENUM_BITFIELD(machine_mode) mode : 8;
242
243 /* 1 in a MEM if we should keep the alias set for this mem unchanged
244 when we access a component.
245 1 in a CALL_INSN if it is a sibling call.
246 1 in a SET that is for a return.
247 In a CODE_LABEL, part of the two-bit alternate entry field. */
248 unsigned int jump : 1;
249 /* In a CODE_LABEL, part of the two-bit alternate entry field.
250 1 in a MEM if it cannot trap. */
251 unsigned int call : 1;
252 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
253 1 in a SUBREG if it references an unsigned object whose mode has been
254 from a promoted to a wider mode.
255 1 in a SYMBOL_REF if it addresses something in the per-function
256 constants pool.
257 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
258 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
259 unsigned int unchanging : 1;
260 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
261 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
262 if it has been deleted.
263 1 in a REG expression if corresponds to a variable declared by the user,
264 0 for an internally generated temporary.
265 1 in a SUBREG with a negative value.
266 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
267 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
268 unsigned int volatil : 1;
269 /* 1 in a MEM referring to a field of an aggregate.
270 0 if the MEM was a variable or the result of a * operator in C;
271 1 if it was the result of a . or -> operator (on a struct) in C.
272 1 in a REG if the register is used only in exit code a loop.
273 1 in a SUBREG expression if was generated from a variable with a
274 promoted mode.
275 1 in a CODE_LABEL if the label is used for nonlocal gotos
276 and must not be deleted even if its count is zero.
277 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
278 together with the preceding insn. Valid only within sched.
279 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
280 from the target of a branch. Valid from reorg until end of compilation;
281 cleared before used. */
282 unsigned int in_struct : 1;
283 /* At the end of RTL generation, 1 if this rtx is used. This is used for
284 copying shared structure. See `unshare_all_rtl'.
285 In a REG, this is not needed for that purpose, and used instead
286 in `leaf_renumber_regs_insn'.
287 1 in a SYMBOL_REF, means that emit_library_call
288 has used it as the function. */
289 unsigned int used : 1;
290 /* 1 in an INSN or a SET if this rtx is related to the call frame,
291 either changing how we compute the frame address or saving and
292 restoring registers in the prologue and epilogue.
293 1 in a REG or MEM if it is a pointer.
294 1 in a SYMBOL_REF if it addresses something in the per-function
295 constant string pool. */
296 unsigned frame_related : 1;
297 /* 1 in a REG or PARALLEL that is the current function's return value.
298 1 in a MEM if it refers to a scalar.
299 1 in a SYMBOL_REF for a weak symbol. */
300 unsigned return_val : 1;
301
302 /* The first element of the operands of this rtx.
303 The number of operands and their types are controlled
304 by the `code' field, according to rtl.def. */
305 union u {
306 rtunion fld[1];
307 HOST_WIDE_INT hwint[1];
308 struct block_symbol block_sym;
309 struct real_value rv;
310 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
311 };
312
313 /* The size in bytes of an rtx header (code, mode and flags). */
314 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
315
316 /* The size in bytes of an rtx with code CODE. */
317 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
318
319 #define NULL_RTX (rtx) 0
320
321 /* The "next" and "previous" RTX, relative to this one. */
322
323 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
324 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
325
326 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
327 */
328 #define RTX_PREV(X) ((INSN_P (X) \
329 || NOTE_P (X) \
330 || BARRIER_P (X) \
331 || LABEL_P (X)) \
332 && PREV_INSN (X) != NULL \
333 && NEXT_INSN (PREV_INSN (X)) == X \
334 ? PREV_INSN (X) : NULL)
335
336 /* Define macros to access the `code' field of the rtx. */
337
338 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
339 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
340
341 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
342 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
343
344 /* RTL vector. These appear inside RTX's when there is a need
345 for a variable number of things. The principle use is inside
346 PARALLEL expressions. */
347
348 struct rtvec_def GTY(()) {
349 int num_elem; /* number of elements */
350 rtx GTY ((length ("%h.num_elem"))) elem[1];
351 };
352
353 #define NULL_RTVEC (rtvec) 0
354
355 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
356 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
357
358 /* Predicate yielding nonzero iff X is an rtx for a register. */
359 #define REG_P(X) (GET_CODE (X) == REG)
360
361 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
362 #define MEM_P(X) (GET_CODE (X) == MEM)
363
364 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
365 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
366
367 /* Predicate yielding nonzero iff X is a label insn. */
368 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
369
370 /* Predicate yielding nonzero iff X is a jump insn. */
371 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
372
373 /* Predicate yielding nonzero iff X is a call insn. */
374 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
375
376 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
377 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
378
379 /* Predicate yielding nonzero iff X is a real insn. */
380 #define INSN_P(X) \
381 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
382
383 /* Predicate yielding nonzero iff X is a note insn. */
384 #define NOTE_P(X) (GET_CODE (X) == NOTE)
385
386 /* Predicate yielding nonzero iff X is a barrier insn. */
387 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
388
389 /* Predicate yielding nonzero iff X is a data for a jump table. */
390 #define JUMP_TABLE_DATA_P(INSN) \
391 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
392 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
393
394 /* 1 if X is a unary operator. */
395
396 #define UNARY_P(X) \
397 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
398
399 /* 1 if X is a binary operator. */
400
401 #define BINARY_P(X) \
402 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
403
404 /* 1 if X is an arithmetic operator. */
405
406 #define ARITHMETIC_P(X) \
407 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
408 == RTX_ARITHMETIC_RESULT)
409
410 /* 1 if X is an arithmetic operator. */
411
412 #define COMMUTATIVE_ARITH_P(X) \
413 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
414
415 /* 1 if X is a commutative arithmetic operator or a comparison operator.
416 These two are sometimes selected together because it is possible to
417 swap the two operands. */
418
419 #define SWAPPABLE_OPERANDS_P(X) \
420 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
421 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
422 | (1 << RTX_COMPARE)))
423
424 /* 1 if X is a non-commutative operator. */
425
426 #define NON_COMMUTATIVE_P(X) \
427 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
428 == RTX_NON_COMMUTATIVE_RESULT)
429
430 /* 1 if X is a commutative operator on integers. */
431
432 #define COMMUTATIVE_P(X) \
433 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
434 == RTX_COMMUTATIVE_RESULT)
435
436 /* 1 if X is a relational operator. */
437
438 #define COMPARISON_P(X) \
439 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
440
441 /* 1 if X is a constant value that is an integer. */
442
443 #define CONSTANT_P(X) \
444 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
445
446 /* 1 if X can be used to represent an object. */
447 #define OBJECT_P(X) \
448 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
449
450 /* General accessor macros for accessing the fields of an rtx. */
451
452 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
453 /* The bit with a star outside the statement expr and an & inside is
454 so that N can be evaluated only once. */
455 #define RTL_CHECK1(RTX, N, C1) __extension__ \
456 (*({ rtx const _rtx = (RTX); const int _n = (N); \
457 const enum rtx_code _code = GET_CODE (_rtx); \
458 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
459 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
460 __FUNCTION__); \
461 if (GET_RTX_FORMAT(_code)[_n] != C1) \
462 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
463 __FUNCTION__); \
464 &_rtx->u.fld[_n]; }))
465
466 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
467 (*({ rtx const _rtx = (RTX); const int _n = (N); \
468 const enum rtx_code _code = GET_CODE (_rtx); \
469 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
470 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
471 __FUNCTION__); \
472 if (GET_RTX_FORMAT(_code)[_n] != C1 \
473 && GET_RTX_FORMAT(_code)[_n] != C2) \
474 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
475 __FUNCTION__); \
476 &_rtx->u.fld[_n]; }))
477
478 #define RTL_CHECKC1(RTX, N, C) __extension__ \
479 (*({ rtx const _rtx = (RTX); const int _n = (N); \
480 if (GET_CODE (_rtx) != (C)) \
481 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
482 __FUNCTION__); \
483 &_rtx->u.fld[_n]; }))
484
485 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
486 (*({ rtx const _rtx = (RTX); const int _n = (N); \
487 const enum rtx_code _code = GET_CODE (_rtx); \
488 if (_code != (C1) && _code != (C2)) \
489 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
490 __FUNCTION__); \
491 &_rtx->u.fld[_n]; }))
492
493 #define RTVEC_ELT(RTVEC, I) __extension__ \
494 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
495 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
496 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
497 __FUNCTION__); \
498 &_rtvec->elem[_i]; }))
499
500 #define XWINT(RTX, N) __extension__ \
501 (*({ rtx const _rtx = (RTX); const int _n = (N); \
502 const enum rtx_code _code = GET_CODE (_rtx); \
503 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
504 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
505 __FUNCTION__); \
506 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
507 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
508 __FUNCTION__); \
509 &_rtx->u.hwint[_n]; }))
510
511 #define XCWINT(RTX, N, C) __extension__ \
512 (*({ rtx const _rtx = (RTX); \
513 if (GET_CODE (_rtx) != (C)) \
514 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
515 __FUNCTION__); \
516 &_rtx->u.hwint[N]; }))
517
518 #define XCMWINT(RTX, N, C, M) __extension__ \
519 (*({ rtx const _rtx = (RTX); \
520 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
521 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
522 __LINE__, __FUNCTION__); \
523 &_rtx->u.hwint[N]; }))
524
525 #define XCNMPRV(RTX, C, M) __extension__ \
526 ({ rtx const _rtx = (RTX); \
527 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
528 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
529 __LINE__, __FUNCTION__); \
530 &_rtx->u.rv; })
531
532 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
533 ({ rtx const _symbol = (RTX); \
534 unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
535 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
536 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
537 __FUNCTION__); \
538 &_symbol->u.block_sym; })
539
540 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
541 const char *)
542 ATTRIBUTE_NORETURN;
543 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
544 const char *)
545 ATTRIBUTE_NORETURN;
546 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
547 int, const char *)
548 ATTRIBUTE_NORETURN;
549 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
550 int, const char *)
551 ATTRIBUTE_NORETURN;
552 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
553 const char *, int, const char *)
554 ATTRIBUTE_NORETURN;
555 extern void rtl_check_failed_code_mode (rtx, enum rtx_code, enum machine_mode,
556 bool, const char *, int, const char *)
557 ATTRIBUTE_NORETURN;
558 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
559 ATTRIBUTE_NORETURN;
560 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
561 const char *)
562 ATTRIBUTE_NORETURN;
563
564 #else /* not ENABLE_RTL_CHECKING */
565
566 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
567 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
568 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
569 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
570 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
571 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
572 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
573 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
574 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
575 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
576 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
577
578 #endif
579
580 /* General accessor macros for accessing the flags of an rtx. */
581
582 /* Access an individual rtx flag, with no checking of any kind. */
583 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
584
585 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
586 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
587 ({ rtx const _rtx = (RTX); \
588 if (GET_CODE(_rtx) != C1) \
589 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
590 __FUNCTION__); \
591 _rtx; })
592
593 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
594 ({ rtx const _rtx = (RTX); \
595 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
596 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
597 __FUNCTION__); \
598 _rtx; })
599
600 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
601 ({ rtx const _rtx = (RTX); \
602 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
603 && GET_CODE(_rtx) != C3) \
604 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
605 __FUNCTION__); \
606 _rtx; })
607
608 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
609 ({ rtx const _rtx = (RTX); \
610 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
611 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
612 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
613 __FUNCTION__); \
614 _rtx; })
615
616 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
617 ({ rtx const _rtx = (RTX); \
618 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
619 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
620 && GET_CODE(_rtx) != C5) \
621 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
622 __FUNCTION__); \
623 _rtx; })
624
625 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
626 __extension__ \
627 ({ rtx const _rtx = (RTX); \
628 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
629 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
630 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
631 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
632 __FUNCTION__); \
633 _rtx; })
634
635 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
636 __extension__ \
637 ({ rtx const _rtx = (RTX); \
638 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
639 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
640 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
641 && GET_CODE(_rtx) != C7) \
642 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
643 __FUNCTION__); \
644 _rtx; })
645
646 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
647 __extension__ \
648 ({ rtx const _rtx = (RTX); \
649 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
650 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
651 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
652 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
653 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
654 __FUNCTION__); \
655 _rtx; })
656
657 extern void rtl_check_failed_flag (const char *, rtx, const char *,
658 int, const char *)
659 ATTRIBUTE_NORETURN
660 ;
661
662 #else /* not ENABLE_RTL_FLAG_CHECKING */
663
664 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
665 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
666 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
667 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
668 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
669 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
670 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
671 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
672 #endif
673
674 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
675 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
676 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
677 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
678 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
679 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
680 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
681 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
682 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
683
684 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
685 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
686
687 /* These are like XINT, etc. except that they expect a '0' field instead
688 of the normal type code. */
689
690 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
691 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
692 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
693 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
694 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
695 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
696 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
697 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
698 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
699 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
700 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
701 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
702 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
703 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
704
705 /* Access a '0' field with any type. */
706 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
707
708 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
709 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
710 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
711 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
712 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
713 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
714 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
715 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
716 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
717 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
718
719 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
720 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
721
722 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
723 \f
724 /* ACCESS MACROS for particular fields of insns. */
725
726 /* Holds a unique number for each insn.
727 These are not necessarily sequentially increasing. */
728 #define INSN_UID(INSN) XINT (INSN, 0)
729
730 /* Chain insns together in sequence. */
731 #define PREV_INSN(INSN) XEXP (INSN, 1)
732 #define NEXT_INSN(INSN) XEXP (INSN, 2)
733
734 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
735 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
736 /* The body of an insn. */
737 #define PATTERN(INSN) XEXP (INSN, 5)
738
739 /* Code number of instruction, from when it was recognized.
740 -1 means this instruction has not been recognized yet. */
741 #define INSN_CODE(INSN) XINT (INSN, 6)
742
743 /* Set up in flow.c; empty before then.
744 Holds a chain of INSN_LIST rtx's whose first operands point at
745 previous insns with direct data-flow connections to this one.
746 That means that those insns set variables whose next use is in this insn.
747 They are always in the same basic block as this insn. */
748 #define LOG_LINKS(INSN) XEXP(INSN, 7)
749
750 #define RTX_FRAME_RELATED_P(RTX) \
751 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
752 JUMP_INSN, BARRIER, SET)->frame_related)
753
754 /* 1 if RTX is an insn that has been deleted. */
755 #define INSN_DELETED_P(RTX) \
756 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
757 CODE_LABEL, BARRIER, NOTE)->volatil)
758
759 /* 1 if RTX is a call to a const or pure function. */
760 #define CONST_OR_PURE_CALL_P(RTX) \
761 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
762 EXPR_LIST)->unchanging)
763
764 /* 1 if RTX is a call_insn for a sibling call. */
765 #define SIBLING_CALL_P(RTX) \
766 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
767
768 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
769 #define INSN_ANNULLED_BRANCH_P(RTX) \
770 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
771
772 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
773 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
774 executed if the branch is taken. For annulled branches with this bit
775 clear, the insn should be executed only if the branch is not taken. */
776 #define INSN_FROM_TARGET_P(RTX) \
777 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
778
779 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
780 See the comments for ADDR_DIFF_VEC in rtl.def. */
781 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
782
783 /* In a VALUE, the value cselib has assigned to RTX.
784 This is a "struct cselib_val_struct", see cselib.h. */
785 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
786
787 /* Holds a list of notes on what this insn does to various REGs.
788 It is a chain of EXPR_LIST rtx's, where the second operand is the
789 chain pointer and the first operand is the REG being described.
790 The mode field of the EXPR_LIST contains not a real machine mode
791 but a value from enum reg_note. */
792 #define REG_NOTES(INSN) XEXP(INSN, 8)
793
794 enum reg_note
795 {
796 #define DEF_REG_NOTE(NAME) NAME,
797 #include "reg-notes.def"
798 #undef DEF_REG_NOTE
799 REG_NOTE_MAX
800 };
801
802 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
803 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
804 #define PUT_REG_NOTE_KIND(LINK, KIND) \
805 PUT_MODE (LINK, (enum machine_mode) (KIND))
806
807 /* Names for REG_NOTE's in EXPR_LIST insn's. */
808
809 extern const char * const reg_note_name[];
810 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
811
812 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
813 USE and CLOBBER expressions.
814 USE expressions list the registers filled with arguments that
815 are passed to the function.
816 CLOBBER expressions document the registers explicitly clobbered
817 by this CALL_INSN.
818 Pseudo registers can not be mentioned in this list. */
819 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
820
821 /* The label-number of a code-label. The assembler label
822 is made from `L' and the label-number printed in decimal.
823 Label numbers are unique in a compilation. */
824 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
825
826 /* In a NOTE that is a line number, this is a string for the file name that the
827 line is in. We use the same field to record block numbers temporarily in
828 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
829 between ints and pointers if we use a different macro for the block number.)
830 */
831
832 /* Opaque data. */
833 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
834 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
835 #ifdef USE_MAPPED_LOCATION
836 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
837 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
838 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
839 #define SET_INSN_DELETED(INSN) \
840 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
841 #else
842 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
843 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
844 (XLOC).line = NOTE_LINE_NUMBER (INSN))
845 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
846 #define SET_INSN_DELETED(INSN) \
847 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
848 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
849 #endif
850 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
851 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
852 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
853 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
854 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
855
856 /* In a NOTE that is a line number, this is the line number.
857 Other kinds of NOTEs are identified by negative numbers here. */
858 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
859
860 /* Nonzero if INSN is a note marking the beginning of a basic block. */
861 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
862 (GET_CODE (INSN) == NOTE \
863 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
864
865 /* Variable declaration and the location of a variable. */
866 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
867 0, VAR_LOCATION))
868 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
869 1, VAR_LOCATION))
870
871 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
872 that are not line numbers. These codes are all negative.
873
874 Notice that we do not try to use zero here for any of
875 the special note codes because sometimes the source line
876 actually can be zero! This happens (for example) when we
877 are generating code for the per-translation-unit constructor
878 and destructor routines for some C++ translation unit. */
879
880 enum insn_note
881 {
882 /* Keep all of these numbers negative. Adjust as needed. */
883 NOTE_INSN_BIAS = -100,
884
885 #define DEF_INSN_NOTE(NAME) NAME,
886 #include "insn-notes.def"
887 #undef DEF_INSN_NOTE
888
889 NOTE_INSN_MAX
890 };
891
892 /* Names for NOTE insn's other than line numbers. */
893
894 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
895 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
896 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
897
898 /* The name of a label, in case it corresponds to an explicit label
899 in the input source code. */
900 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
901
902 /* In jump.c, each label contains a count of the number
903 of LABEL_REFs that point at it, so unused labels can be deleted. */
904 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
905
906 /* Labels carry a two-bit field composed of the ->jump and ->call
907 bits. This field indicates whether the label is an alternate
908 entry point, and if so, what kind. */
909 enum label_kind
910 {
911 LABEL_NORMAL = 0, /* ordinary label */
912 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
913 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
914 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
915 };
916
917 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
918
919 /* Retrieve the kind of LABEL. */
920 #define LABEL_KIND(LABEL) __extension__ \
921 ({ rtx const _label = (LABEL); \
922 if (GET_CODE (_label) != CODE_LABEL) \
923 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
924 __FUNCTION__); \
925 (enum label_kind) ((_label->jump << 1) | _label->call); })
926
927 /* Set the kind of LABEL. */
928 #define SET_LABEL_KIND(LABEL, KIND) do { \
929 rtx _label = (LABEL); \
930 unsigned int _kind = (KIND); \
931 if (GET_CODE (_label) != CODE_LABEL) \
932 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
933 __FUNCTION__); \
934 _label->jump = ((_kind >> 1) & 1); \
935 _label->call = (_kind & 1); \
936 } while (0)
937
938 #else
939
940 /* Retrieve the kind of LABEL. */
941 #define LABEL_KIND(LABEL) \
942 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
943
944 /* Set the kind of LABEL. */
945 #define SET_LABEL_KIND(LABEL, KIND) do { \
946 rtx _label = (LABEL); \
947 unsigned int _kind = (KIND); \
948 _label->jump = ((_kind >> 1) & 1); \
949 _label->call = (_kind & 1); \
950 } while (0)
951
952 #endif /* rtl flag checking */
953
954 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
955
956 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
957 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
958 be decremented and possibly the label can be deleted. */
959 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
960
961 /* Once basic blocks are found in flow.c,
962 each CODE_LABEL starts a chain that goes through
963 all the LABEL_REFs that jump to that label.
964 The chain eventually winds up at the CODE_LABEL: it is circular. */
965 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
966 \f
967 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
968 the number the register originally had; for a pseudo register turned into
969 a hard reg this will hold the old pseudo register number. */
970
971 #define REGNO(RTX) XCUINT (RTX, 0, REG)
972 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
973
974 /* 1 if RTX is a reg or parallel that is the current function's return
975 value. */
976 #define REG_FUNCTION_VALUE_P(RTX) \
977 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
978
979 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
980 #define REG_USERVAR_P(RTX) \
981 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
982
983 /* 1 if RTX is a reg that holds a pointer value. */
984 #define REG_POINTER(RTX) \
985 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
986
987 /* 1 if RTX is a mem that holds a pointer value. */
988 #define MEM_POINTER(RTX) \
989 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
990
991 /* 1 if the given register REG corresponds to a hard register. */
992 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
993
994 /* 1 if the given register number REG_NO corresponds to a hard register. */
995 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
996
997 /* For a CONST_INT rtx, INTVAL extracts the integer. */
998 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
999 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1000
1001 /* For a CONST_DOUBLE:
1002 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1003 low-order word and ..._HIGH the high-order.
1004 For a float, there is a REAL_VALUE_TYPE structure, and
1005 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1006 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1007 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1008 #define CONST_DOUBLE_REAL_VALUE(r) \
1009 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1010
1011 /* For a CONST_VECTOR, return element #n. */
1012 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1013
1014 /* For a CONST_VECTOR, return the number of elements in a vector. */
1015 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1016
1017 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1018 SUBREG_BYTE extracts the byte-number. */
1019
1020 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1021 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1022
1023 /* in rtlanal.c */
1024 /* Return the right cost to give to an operation
1025 to make the cost of the corresponding register-to-register instruction
1026 N times that of a fast register-to-register instruction. */
1027 #define COSTS_N_INSNS(N) ((N) * 4)
1028
1029 /* Maximum cost of an rtl expression. This value has the special meaning
1030 not to use an rtx with this cost under any circumstances. */
1031 #define MAX_COST INT_MAX
1032
1033 extern void init_rtlanal (void);
1034 extern int rtx_cost (rtx, enum rtx_code);
1035 extern int address_cost (rtx, enum machine_mode);
1036 extern unsigned int subreg_lsb (rtx);
1037 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1038 unsigned int);
1039 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1040 unsigned int, enum machine_mode);
1041 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1042 unsigned int, enum machine_mode);
1043 extern unsigned int subreg_regno (rtx);
1044 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
1045 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
1046 extern bool constant_pool_constant_p (rtx);
1047 extern bool truncated_to_mode (enum machine_mode, rtx);
1048
1049
1050 /* 1 if RTX is a subreg containing a reg that is already known to be
1051 sign- or zero-extended from the mode of the subreg to the mode of
1052 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1053 extension.
1054
1055 When used as a LHS, is means that this extension must be done
1056 when assigning to SUBREG_REG. */
1057
1058 #define SUBREG_PROMOTED_VAR_P(RTX) \
1059 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1060
1061 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1062 do { \
1063 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1064 if ((VAL) < 0) \
1065 _rtx->volatil = 1; \
1066 else { \
1067 _rtx->volatil = 0; \
1068 _rtx->unchanging = (VAL); \
1069 } \
1070 } while (0)
1071 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1072 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1073 ? -1 : (RTX)->unchanging)
1074
1075 /* Access various components of an ASM_OPERANDS rtx. */
1076
1077 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1078 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1079 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1080 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1081 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1082 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1083 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1084 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1085 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1086 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1087 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1088 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1089 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1090 #ifdef USE_MAPPED_LOCATION
1091 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1092 #else
1093 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1094 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1095 #endif
1096
1097 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1098 #define MEM_READONLY_P(RTX) \
1099 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1100
1101 /* 1 if RTX is a mem and we should keep the alias set for this mem
1102 unchanged when we access a component. Set to 1, or example, when we
1103 are already in a non-addressable component of an aggregate. */
1104 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1105 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1106
1107 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1108 #define MEM_VOLATILE_P(RTX) \
1109 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1110 ASM_INPUT)->volatil)
1111
1112 /* 1 if RTX is a mem that refers to an aggregate, either to the
1113 aggregate itself or to a field of the aggregate. If zero, RTX may
1114 or may not be such a reference. */
1115 #define MEM_IN_STRUCT_P(RTX) \
1116 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1117
1118 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1119 not refer to a scalar. */
1120 #define MEM_SCALAR_P(RTX) \
1121 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1122
1123 /* 1 if RTX is a mem that cannot trap. */
1124 #define MEM_NOTRAP_P(RTX) \
1125 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1126
1127 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1128 RTX. Otherwise, vice versa. Use this macro only when you are
1129 *sure* that you know that the MEM is in a structure, or is a
1130 scalar. VAL is evaluated only once. */
1131 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1132 do { \
1133 if (VAL) \
1134 { \
1135 MEM_IN_STRUCT_P (RTX) = 1; \
1136 MEM_SCALAR_P (RTX) = 0; \
1137 } \
1138 else \
1139 { \
1140 MEM_IN_STRUCT_P (RTX) = 0; \
1141 MEM_SCALAR_P (RTX) = 1; \
1142 } \
1143 } while (0)
1144
1145 /* The memory attribute block. We provide access macros for each value
1146 in the block and provide defaults if none specified. */
1147 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1148
1149 /* The register attribute block. We provide access macros for each value
1150 in the block and provide defaults if none specified. */
1151 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1152
1153 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1154 set, and may alias anything. Otherwise, the MEM can only alias
1155 MEMs in a conflicting alias set. This value is set in a
1156 language-dependent manner in the front-end, and should not be
1157 altered in the back-end. These set numbers are tested with
1158 alias_sets_conflict_p. */
1159 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1160
1161 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1162 refer to part of a DECL. It may also be a COMPONENT_REF. */
1163 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1164
1165 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1166 RTX that is always a CONST_INT. */
1167 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1168
1169 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1170 is always a CONST_INT. */
1171 #define MEM_SIZE(RTX) \
1172 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1173 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1174 : 0)
1175
1176 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1177 mode as a default when STRICT_ALIGNMENT, but not if not. */
1178 #define MEM_ALIGN(RTX) \
1179 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1180 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1181 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1182
1183 /* For a REG rtx, the decl it is known to refer to, if it is known to
1184 refer to part of a DECL. */
1185 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1186
1187 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1188 RTX that is always a CONST_INT. */
1189 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1190
1191 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1192 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1193 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1194 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1195 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1196 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1197 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1198 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1199 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1200 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1201
1202 /* 1 if RTX is a label_ref for a nonlocal label. */
1203 /* Likewise in an expr_list for a reg_label note. */
1204 #define LABEL_REF_NONLOCAL_P(RTX) \
1205 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1206 REG_LABEL)->volatil)
1207
1208 /* 1 if RTX is a code_label that should always be considered to be needed. */
1209 #define LABEL_PRESERVE_P(RTX) \
1210 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1211
1212 /* During sched, 1 if RTX is an insn that must be scheduled together
1213 with the preceding insn. */
1214 #define SCHED_GROUP_P(RTX) \
1215 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1216 )->in_struct)
1217
1218 /* For a SET rtx, SET_DEST is the place that is set
1219 and SET_SRC is the value it is set to. */
1220 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1221 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1222 #define SET_IS_RETURN_P(RTX) \
1223 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1224
1225 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1226 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1227 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1228
1229 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1230 conditionally executing the code on, COND_EXEC_CODE is the code
1231 to execute if the condition is true. */
1232 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1233 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1234
1235 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1236 constants pool. */
1237 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1238 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1239
1240 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1241 tree constant pool. This information is private to varasm.c. */
1242 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1243 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1244 (RTX), SYMBOL_REF)->frame_related)
1245
1246 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1247 #define SYMBOL_REF_FLAG(RTX) \
1248 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1249
1250 /* 1 if RTX is a symbol_ref that has been the library function in
1251 emit_library_call. */
1252 #define SYMBOL_REF_USED(RTX) \
1253 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1254
1255 /* 1 if RTX is a symbol_ref for a weak symbol. */
1256 #define SYMBOL_REF_WEAK(RTX) \
1257 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1258
1259 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1260 SYMBOL_REF_CONSTANT. */
1261 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1262
1263 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1264 pool symbol. */
1265 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1266 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1267
1268 /* The tree (decl or constant) associated with the symbol, or null. */
1269 #define SYMBOL_REF_DECL(RTX) \
1270 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1271
1272 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1273 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1274 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1275
1276 /* The rtx constant pool entry for a symbol, or null. */
1277 #define SYMBOL_REF_CONSTANT(RTX) \
1278 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1279
1280 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1281 information derivable from the tree decl associated with this symbol.
1282 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1283 decl. In some cases this is a bug. But beyond that, it's nice to cache
1284 this information to avoid recomputing it. Finally, this allows space for
1285 the target to store more than one bit of information, as with
1286 SYMBOL_REF_FLAG. */
1287 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1288
1289 /* These flags are common enough to be defined for all targets. They
1290 are computed by the default version of targetm.encode_section_info. */
1291
1292 /* Set if this symbol is a function. */
1293 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1294 #define SYMBOL_REF_FUNCTION_P(RTX) \
1295 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1296 /* Set if targetm.binds_local_p is true. */
1297 #define SYMBOL_FLAG_LOCAL (1 << 1)
1298 #define SYMBOL_REF_LOCAL_P(RTX) \
1299 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1300 /* Set if targetm.in_small_data_p is true. */
1301 #define SYMBOL_FLAG_SMALL (1 << 2)
1302 #define SYMBOL_REF_SMALL_P(RTX) \
1303 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1304 /* The three-bit field at [5:3] is true for TLS variables; use
1305 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1306 #define SYMBOL_FLAG_TLS_SHIFT 3
1307 #define SYMBOL_REF_TLS_MODEL(RTX) \
1308 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1309 /* Set if this symbol is not defined in this translation unit. */
1310 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1311 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1312 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1313 /* Set if this symbol has a block_symbol structure associated with it. */
1314 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1315 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1316 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1317 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1318 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1319 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1320 #define SYMBOL_REF_ANCHOR_P(RTX) \
1321 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1322
1323 /* Subsequent bits are available for the target to use. */
1324 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1325 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1326
1327 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1328 structure to which the symbol belongs, or NULL if it has not been
1329 assigned a block. */
1330 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1331
1332 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1333 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1334 RTX has not yet been assigned to a block, or it has not been given an
1335 offset within that block. */
1336 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1337
1338 /* Define a macro to look for REG_INC notes,
1339 but save time on machines where they never exist. */
1340
1341 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1342 #define FIND_REG_INC_NOTE(INSN, REG) \
1343 ((REG) != NULL_RTX && REG_P ((REG)) \
1344 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1345 : find_reg_note ((INSN), REG_INC, (REG)))
1346 #else
1347 #define FIND_REG_INC_NOTE(INSN, REG) 0
1348 #endif
1349
1350 /* Indicate whether the machine has any sort of auto increment addressing.
1351 If not, we can avoid checking for REG_INC notes. */
1352
1353 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1354 #define AUTO_INC_DEC
1355 #endif
1356
1357 #ifndef HAVE_PRE_INCREMENT
1358 #define HAVE_PRE_INCREMENT 0
1359 #endif
1360
1361 #ifndef HAVE_PRE_DECREMENT
1362 #define HAVE_PRE_DECREMENT 0
1363 #endif
1364
1365 #ifndef HAVE_POST_INCREMENT
1366 #define HAVE_POST_INCREMENT 0
1367 #endif
1368
1369 #ifndef HAVE_POST_DECREMENT
1370 #define HAVE_POST_DECREMENT 0
1371 #endif
1372
1373 #ifndef HAVE_POST_MODIFY_DISP
1374 #define HAVE_POST_MODIFY_DISP 0
1375 #endif
1376
1377 #ifndef HAVE_POST_MODIFY_REG
1378 #define HAVE_POST_MODIFY_REG 0
1379 #endif
1380
1381 #ifndef HAVE_PRE_MODIFY_DISP
1382 #define HAVE_PRE_MODIFY_DISP 0
1383 #endif
1384
1385 #ifndef HAVE_PRE_MODIFY_REG
1386 #define HAVE_PRE_MODIFY_REG 0
1387 #endif
1388
1389
1390 /* Some architectures do not have complete pre/post increment/decrement
1391 instruction sets, or only move some modes efficiently. These macros
1392 allow us to tune autoincrement generation. */
1393
1394 #ifndef USE_LOAD_POST_INCREMENT
1395 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1396 #endif
1397
1398 #ifndef USE_LOAD_POST_DECREMENT
1399 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1400 #endif
1401
1402 #ifndef USE_LOAD_PRE_INCREMENT
1403 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1404 #endif
1405
1406 #ifndef USE_LOAD_PRE_DECREMENT
1407 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1408 #endif
1409
1410 #ifndef USE_STORE_POST_INCREMENT
1411 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1412 #endif
1413
1414 #ifndef USE_STORE_POST_DECREMENT
1415 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1416 #endif
1417
1418 #ifndef USE_STORE_PRE_INCREMENT
1419 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1420 #endif
1421
1422 #ifndef USE_STORE_PRE_DECREMENT
1423 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1424 #endif
1425 \f
1426 /* Nonzero when we are generating CONCATs. */
1427 extern int generating_concat_p;
1428
1429 /* Nonzero when we are expanding trees to RTL. */
1430 extern int currently_expanding_to_rtl;
1431
1432 /* Generally useful functions. */
1433
1434 /* In expmed.c */
1435 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1436
1437 /* In builtins.c */
1438 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1439
1440 /* In explow.c */
1441 extern void set_stack_check_libfunc (rtx);
1442 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1443 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1444
1445 /* In emit-rtl.c */
1446 extern rtvec gen_rtvec (int, ...);
1447 extern rtx copy_insn_1 (rtx);
1448 extern rtx copy_insn (rtx);
1449 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1450 extern rtx emit_copy_of_insn_after (rtx, rtx);
1451 extern void set_reg_attrs_from_mem (rtx, rtx);
1452 extern void set_mem_attrs_from_reg (rtx, rtx);
1453 extern void set_reg_attrs_for_parm (rtx, rtx);
1454 extern int mem_expr_equal_p (tree, tree);
1455
1456 /* In rtl.c */
1457 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1458 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1459
1460 extern rtvec rtvec_alloc (int);
1461 extern rtx copy_rtx (rtx);
1462 extern void dump_rtx_statistics (void);
1463
1464 /* In emit-rtl.c */
1465 extern rtx copy_rtx_if_shared (rtx);
1466
1467 /* In rtl.c */
1468 extern unsigned int rtx_size (rtx);
1469 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1470 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1471 extern int rtx_equal_p (rtx, rtx);
1472
1473 /* In emit-rtl.c */
1474 extern rtvec gen_rtvec_v (int, rtx *);
1475 extern rtx gen_reg_rtx (enum machine_mode);
1476 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1477 extern rtx gen_label_rtx (void);
1478 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1479
1480 /* In cse.c */
1481 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1482
1483 /* In emit-rtl.c */
1484 extern rtx gen_highpart (enum machine_mode, rtx);
1485 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1486 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1487
1488 /* In emit-rtl.c */
1489 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1490 extern int subreg_lowpart_p (rtx);
1491 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1492 enum machine_mode);
1493 extern unsigned int subreg_highpart_offset (enum machine_mode,
1494 enum machine_mode);
1495 extern rtx make_safe_from (rtx, rtx);
1496 extern rtx convert_memory_address (enum machine_mode, rtx);
1497 extern rtx get_insns (void);
1498 extern const char *get_insn_name (int);
1499 extern rtx get_last_insn (void);
1500 extern rtx get_last_insn_anywhere (void);
1501 extern rtx get_first_nonnote_insn (void);
1502 extern rtx get_last_nonnote_insn (void);
1503 extern void start_sequence (void);
1504 extern void push_to_sequence (rtx);
1505 extern void end_sequence (void);
1506 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1507 enum machine_mode);
1508
1509 /* In loop-iv.c */
1510
1511 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1512
1513 /* In varasm.c */
1514 extern rtx force_const_mem (enum machine_mode, rtx);
1515
1516 /* In varasm.c */
1517
1518 struct function;
1519 extern rtx get_pool_constant (rtx);
1520 extern rtx get_pool_constant_mark (rtx, bool *);
1521 extern enum machine_mode get_pool_mode (rtx);
1522 extern rtx simplify_subtraction (rtx);
1523
1524 /* In function.c */
1525 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1526 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1527 extern rtx assign_stack_temp_for_type (enum machine_mode,
1528 HOST_WIDE_INT, int, tree);
1529 extern rtx assign_temp (tree, int, int, int);
1530
1531 /* In emit-rtl.c */
1532 extern rtx emit_insn_before (rtx, rtx);
1533 extern rtx emit_insn_before_noloc (rtx, rtx);
1534 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1535 extern rtx emit_jump_insn_before (rtx, rtx);
1536 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1537 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1538 extern rtx emit_call_insn_before (rtx, rtx);
1539 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1540 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1541 extern rtx emit_barrier_before (rtx);
1542 extern rtx emit_label_before (rtx, rtx);
1543 extern rtx emit_note_before (int, rtx);
1544 extern rtx emit_insn_after (rtx, rtx);
1545 extern rtx emit_insn_after_noloc (rtx, rtx);
1546 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1547 extern rtx emit_jump_insn_after (rtx, rtx);
1548 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1549 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1550 extern rtx emit_call_insn_after (rtx, rtx);
1551 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1552 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1553 extern rtx emit_barrier_after (rtx);
1554 extern rtx emit_label_after (rtx, rtx);
1555 extern rtx emit_note_after (int, rtx);
1556 extern rtx emit_insn (rtx);
1557 extern rtx emit_jump_insn (rtx);
1558 extern rtx emit_call_insn (rtx);
1559 extern rtx emit_label (rtx);
1560 extern rtx emit_barrier (void);
1561 extern rtx emit_note (int);
1562 extern rtx emit_note_copy (rtx);
1563 extern rtx emit_line_note (location_t);
1564 extern rtx make_insn_raw (rtx);
1565 extern rtx make_jump_insn_raw (rtx);
1566 extern void add_function_usage_to (rtx, rtx);
1567 extern rtx last_call_insn (void);
1568 extern rtx previous_insn (rtx);
1569 extern rtx next_insn (rtx);
1570 extern rtx prev_nonnote_insn (rtx);
1571 extern rtx next_nonnote_insn (rtx);
1572 extern rtx prev_real_insn (rtx);
1573 extern rtx next_real_insn (rtx);
1574 extern rtx prev_active_insn (rtx);
1575 extern rtx next_active_insn (rtx);
1576 extern int active_insn_p (rtx);
1577 extern rtx prev_label (rtx);
1578 extern rtx next_label (rtx);
1579 extern rtx skip_consecutive_labels (rtx);
1580 extern rtx next_cc0_user (rtx);
1581 extern rtx prev_cc0_setter (rtx);
1582
1583 /* In cfglayout.c */
1584 extern int insn_line (rtx);
1585 extern const char * insn_file (rtx);
1586 extern int locator_line (int);
1587 extern const char * locator_file (int);
1588 extern int prologue_locator, epilogue_locator;
1589
1590 /* In jump.c */
1591 extern enum rtx_code reverse_condition (enum rtx_code);
1592 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1593 extern enum rtx_code swap_condition (enum rtx_code);
1594 extern enum rtx_code unsigned_condition (enum rtx_code);
1595 extern enum rtx_code signed_condition (enum rtx_code);
1596 extern void mark_jump_label (rtx, rtx, int);
1597 extern unsigned int cleanup_barriers (void);
1598
1599 /* In jump.c */
1600 extern bool squeeze_notes (rtx *, rtx *);
1601 extern rtx delete_related_insns (rtx);
1602 extern void delete_jump (rtx);
1603 extern rtx get_label_before (rtx);
1604 extern rtx get_label_after (rtx);
1605 extern rtx follow_jumps (rtx);
1606
1607 /* In recog.c */
1608 extern rtx *find_constant_term_loc (rtx *);
1609
1610 /* In emit-rtl.c */
1611 extern rtx try_split (rtx, rtx, int);
1612 extern int split_branch_probability;
1613
1614 /* In unknown file */
1615 extern rtx split_insns (rtx, rtx);
1616
1617 /* In simplify-rtx.c */
1618 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1619 rtx, enum machine_mode);
1620 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1621 enum machine_mode);
1622 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1623 rtx, rtx);
1624 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1625 rtx);
1626 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1627 enum machine_mode, rtx, rtx, rtx);
1628 extern rtx simplify_const_relational_operation (enum rtx_code,
1629 enum machine_mode, rtx, rtx);
1630 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1631 enum machine_mode, rtx, rtx);
1632 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1633 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1634 enum machine_mode);
1635 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1636 enum machine_mode, rtx, rtx, rtx);
1637 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1638 enum machine_mode, rtx, rtx);
1639 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1640 unsigned int);
1641 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1642 unsigned int);
1643 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1644 extern rtx simplify_rtx (rtx);
1645 extern rtx avoid_constant_pool_reference (rtx);
1646 extern bool constant_pool_reference_p (rtx x);
1647 extern bool mode_signbit_p (enum machine_mode, rtx);
1648
1649 /* In regclass.c */
1650 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1651 bool);
1652
1653 /* In emit-rtl.c */
1654 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1655
1656 /* Functions in rtlanal.c */
1657
1658 /* Single set is implemented as macro for performance reasons. */
1659 #define single_set(I) (INSN_P (I) \
1660 ? (GET_CODE (PATTERN (I)) == SET \
1661 ? PATTERN (I) : single_set_1 (I)) \
1662 : NULL_RTX)
1663 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1664
1665 /* Structure used for passing data to REPLACE_LABEL. */
1666 typedef struct replace_label_data
1667 {
1668 rtx r1;
1669 rtx r2;
1670 bool update_label_nuses;
1671 } replace_label_data;
1672
1673 extern int rtx_addr_can_trap_p (rtx);
1674 extern bool nonzero_address_p (rtx);
1675 extern int rtx_unstable_p (rtx);
1676 extern int rtx_varies_p (rtx, int);
1677 extern int rtx_addr_varies_p (rtx, int);
1678 extern HOST_WIDE_INT get_integer_term (rtx);
1679 extern rtx get_related_value (rtx);
1680 extern int reg_mentioned_p (rtx, rtx);
1681 extern int count_occurrences (rtx, rtx, int);
1682 extern int reg_referenced_p (rtx, rtx);
1683 extern int reg_used_between_p (rtx, rtx, rtx);
1684 extern int reg_set_between_p (rtx, rtx, rtx);
1685 extern int commutative_operand_precedence (rtx);
1686 extern int swap_commutative_operands_p (rtx, rtx);
1687 extern int modified_between_p (rtx, rtx, rtx);
1688 extern int no_labels_between_p (rtx, rtx);
1689 extern int modified_in_p (rtx, rtx);
1690 extern int reg_set_p (rtx, rtx);
1691 extern rtx single_set_2 (rtx, rtx);
1692 extern int multiple_sets (rtx);
1693 extern int set_noop_p (rtx);
1694 extern int noop_move_p (rtx);
1695 extern rtx find_last_value (rtx, rtx *, rtx, int);
1696 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1697 extern int reg_overlap_mentioned_p (rtx, rtx);
1698 extern rtx set_of (rtx, rtx);
1699 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1700 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1701 extern int dead_or_set_p (rtx, rtx);
1702 extern int dead_or_set_regno_p (rtx, unsigned int);
1703 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1704 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1705 extern rtx find_reg_equal_equiv_note (rtx);
1706 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1707 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1708 extern int pure_call_p (rtx);
1709 extern void remove_note (rtx, rtx);
1710 extern int side_effects_p (rtx);
1711 extern int volatile_refs_p (rtx);
1712 extern int volatile_insn_p (rtx);
1713 extern int may_trap_p (rtx);
1714 extern int may_trap_after_code_motion_p (rtx);
1715 extern int may_trap_or_fault_p (rtx);
1716 extern int inequality_comparisons_p (rtx);
1717 extern rtx replace_rtx (rtx, rtx, rtx);
1718 extern int replace_label (rtx *, void *);
1719 extern int rtx_referenced_p (rtx, rtx);
1720 extern bool tablejump_p (rtx, rtx *, rtx *);
1721 extern int computed_jump_p (rtx);
1722 typedef int (*rtx_function) (rtx *, void *);
1723 extern int for_each_rtx (rtx *, rtx_function, void *);
1724 extern rtx regno_use_in (unsigned int, rtx);
1725 extern int auto_inc_p (rtx);
1726 extern int in_expr_list_p (rtx, rtx);
1727 extern void remove_node_from_expr_list (rtx, rtx *);
1728 extern int loc_mentioned_in_p (rtx *, rtx);
1729 extern rtx find_first_parameter_load (rtx, rtx);
1730 extern bool keep_with_call_p (rtx);
1731 extern bool label_is_jump_target_p (rtx, rtx);
1732 extern int insn_rtx_cost (rtx);
1733
1734 /* Given an insn and condition, return a canonical description of
1735 the test being made. */
1736 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1737
1738 /* Given a JUMP_INSN, return a canonical description of the test
1739 being made. */
1740 extern rtx get_condition (rtx, rtx *, int, int);
1741
1742
1743 /* flow.c */
1744
1745 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1746
1747 /* lists.c */
1748
1749 void free_EXPR_LIST_list (rtx *);
1750 void free_INSN_LIST_list (rtx *);
1751 void free_EXPR_LIST_node (rtx);
1752 void free_INSN_LIST_node (rtx);
1753 rtx alloc_INSN_LIST (rtx, rtx);
1754 rtx alloc_EXPR_LIST (int, rtx, rtx);
1755 void free_DEPS_LIST_list (rtx *);
1756 rtx alloc_DEPS_LIST (rtx, rtx, int);
1757 void remove_free_DEPS_LIST_elem (rtx, rtx *);
1758 void remove_free_INSN_LIST_elem (rtx, rtx *);
1759 rtx remove_list_elem (rtx, rtx *);
1760 rtx copy_DEPS_LIST_list (rtx);
1761
1762 /* regclass.c */
1763
1764 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1765 Always at least 3, since the combiner could put that many together
1766 and we want this to remain correct for all the remaining passes. */
1767
1768 extern int max_parallel;
1769
1770 /* Free up register info memory. */
1771 extern void free_reg_info (void);
1772
1773 /* recog.c */
1774 extern int asm_noperands (rtx);
1775 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1776 enum machine_mode *);
1777
1778 extern enum reg_class reg_preferred_class (int);
1779 extern enum reg_class reg_alternate_class (int);
1780
1781 extern void split_all_insns (int);
1782 extern unsigned int split_all_insns_noflow (void);
1783
1784 #define MAX_SAVED_CONST_INT 64
1785 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1786
1787 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1788 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1789 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1790 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1791 extern GTY(()) rtx const_true_rtx;
1792
1793 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1794
1795 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1796 same as VOIDmode. */
1797
1798 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1799
1800 /* Likewise, for the constants 1 and 2. */
1801
1802 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1803 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1804
1805 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1806 is used to represent the frame pointer. This is because the
1807 hard frame pointer and the automatic variables are separated by an amount
1808 that cannot be determined until after register allocation. We can assume
1809 that in this case ELIMINABLE_REGS will be defined, one action of which
1810 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1811 #ifndef HARD_FRAME_POINTER_REGNUM
1812 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1813 #endif
1814
1815 /* Index labels for global_rtl. */
1816 enum global_rtl_index
1817 {
1818 GR_PC,
1819 GR_CC0,
1820 GR_STACK_POINTER,
1821 GR_FRAME_POINTER,
1822 /* For register elimination to work properly these hard_frame_pointer_rtx,
1823 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1824 the same register. */
1825 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1826 GR_ARG_POINTER = GR_FRAME_POINTER,
1827 #endif
1828 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1829 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1830 #else
1831 GR_HARD_FRAME_POINTER,
1832 #endif
1833 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1834 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1835 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1836 #else
1837 GR_ARG_POINTER,
1838 #endif
1839 #endif
1840 GR_VIRTUAL_INCOMING_ARGS,
1841 GR_VIRTUAL_STACK_ARGS,
1842 GR_VIRTUAL_STACK_DYNAMIC,
1843 GR_VIRTUAL_OUTGOING_ARGS,
1844 GR_VIRTUAL_CFA,
1845
1846 GR_MAX
1847 };
1848
1849 /* Pointers to standard pieces of rtx are stored here. */
1850 extern GTY(()) rtx global_rtl[GR_MAX];
1851
1852 /* Standard pieces of rtx, to be substituted directly into things. */
1853 #define pc_rtx (global_rtl[GR_PC])
1854 #define cc0_rtx (global_rtl[GR_CC0])
1855
1856 /* All references to certain hard regs, except those created
1857 by allocating pseudo regs into them (when that's possible),
1858 go through these unique rtx objects. */
1859 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1860 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1861 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1862 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1863
1864 extern GTY(()) rtx pic_offset_table_rtx;
1865 extern GTY(()) rtx static_chain_rtx;
1866 extern GTY(()) rtx static_chain_incoming_rtx;
1867 extern GTY(()) rtx return_address_pointer_rtx;
1868
1869 /* Include the RTL generation functions. */
1870
1871 #ifndef GENERATOR_FILE
1872 #include "genrtl.h"
1873 #ifndef USE_MAPPED_LOCATION
1874 #undef gen_rtx_ASM_OPERANDS
1875 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1876 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1877 #endif
1878 #endif
1879
1880 /* There are some RTL codes that require special attention; the
1881 generation functions included above do the raw handling. If you
1882 add to this list, modify special_rtx in gengenrtl.c as well. */
1883
1884 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1885 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1886 extern rtx gen_raw_REG (enum machine_mode, int);
1887 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1888 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1889 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1890
1891 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1892
1893 /* Virtual registers are used during RTL generation to refer to locations into
1894 the stack frame when the actual location isn't known until RTL generation
1895 is complete. The routine instantiate_virtual_regs replaces these with
1896 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1897 a constant. */
1898
1899 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1900
1901 /* This points to the first word of the incoming arguments passed on the stack,
1902 either by the caller or by the callee when pretending it was passed by the
1903 caller. */
1904
1905 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1906
1907 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1908
1909 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1910 variable on the stack. Otherwise, it points to the first variable on
1911 the stack. */
1912
1913 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1914
1915 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1916
1917 /* This points to the location of dynamically-allocated memory on the stack
1918 immediately after the stack pointer has been adjusted by the amount
1919 desired. */
1920
1921 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1922
1923 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1924
1925 /* This points to the location in the stack at which outgoing arguments should
1926 be written when the stack is pre-pushed (arguments pushed using push
1927 insns always use sp). */
1928
1929 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1930
1931 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1932
1933 /* This points to the Canonical Frame Address of the function. This
1934 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1935 but is calculated relative to the arg pointer for simplicity; the
1936 frame pointer nor stack pointer are necessarily fixed relative to
1937 the CFA until after reload. */
1938
1939 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1940
1941 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1942
1943 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1944
1945 /* Nonzero if REGNUM is a pointer into the stack frame. */
1946 #define REGNO_PTR_FRAME_P(REGNUM) \
1947 ((REGNUM) == STACK_POINTER_REGNUM \
1948 || (REGNUM) == FRAME_POINTER_REGNUM \
1949 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1950 || (REGNUM) == ARG_POINTER_REGNUM \
1951 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1952 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1953
1954 /* REGNUM never really appearing in the INSN stream. */
1955 #define INVALID_REGNUM (~(unsigned int) 0)
1956
1957 extern rtx output_constant_def (tree, int);
1958 extern rtx lookup_constant_def (tree);
1959
1960 /* Nonzero after the second flow pass has completed.
1961 Set to 1 or 0 by toplev.c */
1962 extern int flow2_completed;
1963
1964 /* Nonzero after end of reload pass.
1965 Set to 1 or 0 by reload1.c. */
1966
1967 extern int reload_completed;
1968
1969 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1970 extern int epilogue_completed;
1971
1972 /* Set to 1 while reload_as_needed is operating.
1973 Required by some machines to handle any generated moves differently. */
1974
1975 extern int reload_in_progress;
1976
1977 #ifdef STACK_REGS
1978 /* Nonzero after end of regstack pass.
1979 Set to 1 or 0 by reg-stack.c. */
1980 extern int regstack_completed;
1981 #endif
1982
1983 /* If this is nonzero, we do not bother generating VOLATILE
1984 around volatile memory references, and we are willing to
1985 output indirect addresses. If cse is to follow, we reject
1986 indirect addresses so a useful potential cse is generated;
1987 if it is used only once, instruction combination will produce
1988 the same indirect address eventually. */
1989 extern int cse_not_expected;
1990
1991 /* Set to nonzero before life analysis to indicate that it is unsafe to
1992 generate any new pseudo registers. */
1993 extern int no_new_pseudos;
1994
1995 /* Translates rtx code to tree code, for those codes needed by
1996 REAL_ARITHMETIC. The function returns an int because the caller may not
1997 know what `enum tree_code' means. */
1998
1999 extern int rtx_to_tree_code (enum rtx_code);
2000
2001 /* In cse.c */
2002 extern int delete_trivially_dead_insns (rtx, int);
2003 extern int cse_main (rtx, int);
2004 extern int exp_equiv_p (rtx, rtx, int, bool);
2005 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
2006
2007 /* In jump.c */
2008 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2009 extern int condjump_p (rtx);
2010 extern int any_condjump_p (rtx);
2011 extern int any_uncondjump_p (rtx);
2012 extern rtx pc_set (rtx);
2013 extern rtx condjump_label (rtx);
2014 extern int simplejump_p (rtx);
2015 extern int returnjump_p (rtx);
2016 extern int onlyjump_p (rtx);
2017 extern int only_sets_cc0_p (rtx);
2018 extern int sets_cc0_p (rtx);
2019 extern int invert_jump_1 (rtx, rtx);
2020 extern int invert_jump (rtx, rtx, int);
2021 extern int rtx_renumbered_equal_p (rtx, rtx);
2022 extern int true_regnum (rtx);
2023 extern unsigned int reg_or_subregno (rtx);
2024 extern int redirect_jump_1 (rtx, rtx);
2025 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2026 extern int redirect_jump (rtx, rtx, int);
2027 extern void rebuild_jump_labels (rtx);
2028 extern rtx reversed_comparison (rtx, enum machine_mode);
2029 extern enum rtx_code reversed_comparison_code (rtx, rtx);
2030 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
2031 rtx, rtx, rtx);
2032 extern void delete_for_peephole (rtx, rtx);
2033 extern int condjump_in_parallel_p (rtx);
2034 extern unsigned int purge_line_number_notes (void);
2035
2036 /* In emit-rtl.c. */
2037 extern int max_reg_num (void);
2038 extern int max_label_num (void);
2039 extern int get_first_label_num (void);
2040 extern void maybe_set_first_label_num (rtx);
2041 extern void delete_insns_since (rtx);
2042 extern void mark_reg_pointer (rtx, int);
2043 extern void mark_user_reg (rtx);
2044 extern void reset_used_flags (rtx);
2045 extern void set_used_flags (rtx);
2046 extern void reorder_insns (rtx, rtx, rtx);
2047 extern void reorder_insns_nobb (rtx, rtx, rtx);
2048 extern int get_max_uid (void);
2049 extern int in_sequence_p (void);
2050 extern void force_next_line_note (void);
2051 extern void init_emit (void);
2052 extern void init_emit_once (int);
2053 extern void push_topmost_sequence (void);
2054 extern void pop_topmost_sequence (void);
2055 extern void set_new_first_and_last_insn (rtx, rtx);
2056 extern unsigned int unshare_all_rtl (void);
2057 extern void unshare_all_rtl_again (rtx);
2058 extern void unshare_all_rtl_in_chain (rtx);
2059 extern void verify_rtl_sharing (void);
2060 extern void set_first_insn (rtx);
2061 extern void set_last_insn (rtx);
2062 extern void link_cc0_insns (rtx);
2063 extern void add_insn (rtx);
2064 extern void add_insn_before (rtx, rtx);
2065 extern void add_insn_after (rtx, rtx);
2066 extern void remove_insn (rtx);
2067 extern rtx emit (rtx);
2068 extern void renumber_insns (void);
2069 extern rtx delete_insn (rtx);
2070 extern rtx entry_of_function (void);
2071 extern void emit_insn_at_entry (rtx);
2072 extern void delete_insn_chain (rtx, rtx);
2073 extern rtx unlink_insn_chain (rtx, rtx);
2074 extern rtx delete_insn_and_edges (rtx);
2075 extern void delete_insn_chain_and_edges (rtx, rtx);
2076 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2077 extern rtx gen_const_mem (enum machine_mode, rtx);
2078 extern rtx gen_frame_mem (enum machine_mode, rtx);
2079 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2080 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2081 rtx, unsigned int);
2082
2083 /* In combine.c */
2084 extern unsigned int extended_count (rtx, enum machine_mode, int);
2085 extern rtx remove_death (unsigned int, rtx);
2086 extern void dump_combine_stats (FILE *);
2087 extern void dump_combine_total_stats (FILE *);
2088
2089 /* In sched-vis.c. */
2090 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2091 extern void dump_insn_slim (FILE *f, rtx x);
2092 extern void debug_insn_slim (rtx x);
2093
2094 /* In sched-rgn.c. */
2095 extern void schedule_insns (void);
2096
2097 /* In sched-ebb.c. */
2098 extern void schedule_ebbs (void);
2099
2100 /* In haifa-sched.c. */
2101 extern void fix_sched_param (const char *, const char *);
2102
2103 /* In print-rtl.c */
2104 extern const char *print_rtx_head;
2105 extern void debug_rtx (rtx);
2106 extern void debug_rtx_list (rtx, int);
2107 extern void debug_rtx_range (rtx, rtx);
2108 extern rtx debug_rtx_find (rtx, int);
2109 extern void print_mem_expr (FILE *, tree);
2110 extern void print_rtl (FILE *, rtx);
2111 extern void print_simple_rtl (FILE *, rtx);
2112 extern int print_rtl_single (FILE *, rtx);
2113 extern void print_inline_rtx (FILE *, rtx, int);
2114
2115 /* In bt-load.c */
2116 extern void branch_target_load_optimize (bool);
2117
2118 /* In function.c */
2119 extern void reposition_prologue_and_epilogue_notes (rtx);
2120 extern void thread_prologue_and_epilogue_insns (rtx);
2121 extern int prologue_epilogue_contains (rtx);
2122 extern int sibcall_epilogue_contains (rtx);
2123 extern void mark_temp_addr_taken (rtx);
2124 extern void update_temp_slot_address (rtx, rtx);
2125
2126 /* In stmt.c */
2127 extern void expand_null_return (void);
2128 extern void expand_naked_return (void);
2129 extern void emit_jump (rtx);
2130
2131 /* In expr.c */
2132 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2133 unsigned int, int);
2134
2135 /* In flow.c */
2136 extern void delete_dead_jumptables (void);
2137 extern void print_rtl_with_bb (FILE *, rtx);
2138 extern void dump_flow_info (FILE *, int);
2139
2140 /* In expmed.c */
2141 extern void init_expmed (void);
2142 extern void expand_inc (rtx, rtx);
2143 extern void expand_dec (rtx, rtx);
2144
2145 /* In gcse.c */
2146 extern bool can_copy_p (enum machine_mode);
2147 extern rtx fis_get_condition (rtx);
2148
2149 /* In global.c */
2150 extern void mark_elimination (int, int);
2151 extern void dump_global_regs (FILE *);
2152 #ifdef HARD_CONST
2153 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2154 extern void retry_global_alloc (int, HARD_REG_SET);
2155 #endif
2156 extern void build_insn_chain (rtx);
2157
2158 /* In regclass.c */
2159 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2160 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2161 extern void globalize_reg (int);
2162 extern void init_reg_modes_once (void);
2163 extern void init_regs (void);
2164 extern void init_fake_stack_mems (void);
2165 extern void init_reg_sets (void);
2166 extern void regclass_init (void);
2167 extern void regclass (rtx, int);
2168 extern void reg_scan (rtx, unsigned int);
2169 extern void fix_register (const char *, int, int);
2170 extern void init_subregs_of_mode (void);
2171 extern void record_subregs_of_mode (rtx);
2172 #ifdef HARD_CONST
2173 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2174 enum machine_mode, unsigned int);
2175 #endif
2176 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2177 enum machine_mode);
2178
2179 /* In reorg.c */
2180 extern void dbr_schedule (rtx);
2181
2182 /* In local-alloc.c */
2183 extern void dump_local_alloc (FILE *);
2184
2185 /* In reload1.c */
2186 extern int function_invariant_p (rtx);
2187
2188 /* In calls.c */
2189 enum libcall_type
2190 {
2191 LCT_NORMAL = 0,
2192 LCT_CONST = 1,
2193 LCT_PURE = 2,
2194 LCT_CONST_MAKE_BLOCK = 3,
2195 LCT_PURE_MAKE_BLOCK = 4,
2196 LCT_NORETURN = 5,
2197 LCT_THROW = 6,
2198 LCT_RETURNS_TWICE = 7
2199 };
2200
2201 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2202 ...);
2203 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2204 enum machine_mode, int, ...);
2205
2206 /* In varasm.c */
2207 extern void init_varasm_once (void);
2208 extern enum tls_model decl_default_tls_model (tree);
2209
2210 /* In rtl.c */
2211 extern void traverse_md_constants (int (*) (void **, void *), void *);
2212 struct md_constant { char *name, *value; };
2213
2214 /* In read-rtl.c */
2215 extern int read_skip_spaces (FILE *);
2216 extern bool read_rtx (FILE *, rtx *, int *);
2217 extern void copy_rtx_ptr_loc (const void *, const void *);
2218 extern void print_rtx_ptr_loc (const void *);
2219 extern const char *join_c_conditions (const char *, const char *);
2220 extern void print_c_condition (const char *);
2221 extern const char *read_rtx_filename;
2222 extern int read_rtx_lineno;
2223
2224 /* In alias.c */
2225 extern void clear_reg_alias_info (rtx);
2226 extern rtx canon_rtx (rtx);
2227 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2228 extern rtx get_addr (rtx);
2229 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2230 int (*)(rtx, int));
2231 extern int read_dependence (rtx, rtx);
2232 extern int anti_dependence (rtx, rtx);
2233 extern int output_dependence (rtx, rtx);
2234 extern void init_alias_once (void);
2235 extern void init_alias_analysis (void);
2236 extern void end_alias_analysis (void);
2237 extern bool memory_modified_in_insn_p (rtx, rtx);
2238 extern rtx find_base_term (rtx);
2239 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2240 extern rtx get_reg_known_value (unsigned int);
2241 extern bool get_reg_known_equiv_p (unsigned int);
2242
2243 #ifdef STACK_REGS
2244 extern int stack_regs_mentioned (rtx insn);
2245 #endif
2246
2247 /* In toplev.c */
2248 extern GTY(()) rtx stack_limit_rtx;
2249
2250 /* In predict.c */
2251 extern void invert_br_probabilities (rtx);
2252 extern bool expensive_function_p (int);
2253 /* In cfgexpand.c */
2254 extern void add_reg_br_prob_note (rtx last, int probability);
2255 /* In tracer.c */
2256 extern void tracer (unsigned int);
2257
2258 /* In var-tracking.c */
2259 extern unsigned int variable_tracking_main (void);
2260
2261 /* In stor-layout.c. */
2262 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2263 rtx *, rtx *);
2264
2265 /* In loop-unswitch.c */
2266 extern rtx reversed_condition (rtx);
2267 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2268
2269 /* In loop-iv.c */
2270 extern rtx canon_condition (rtx);
2271 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2272 \f
2273 struct rtl_hooks
2274 {
2275 rtx (*gen_lowpart) (enum machine_mode, rtx);
2276 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2277 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2278 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2279 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2280 unsigned int, unsigned int *);
2281 bool (*reg_truncated_to_mode) (enum machine_mode, rtx);
2282
2283 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2284 };
2285
2286 /* Each pass can provide its own. */
2287 extern struct rtl_hooks rtl_hooks;
2288
2289 /* ... but then it has to restore these. */
2290 extern const struct rtl_hooks general_rtl_hooks;
2291
2292 /* Keep this for the nonce. */
2293 #define gen_lowpart rtl_hooks.gen_lowpart
2294
2295 #endif /* ! GCC_RTL_H */
Mirror of the offical gcc git repository hosted at gcc.gnu.org