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* config/mips/mips.md (length): Don't use mips_fetch_insns for indexed
[official-gcc.git] / gcc / rtl.h
blob120e79443736a266ee09a40b450ead6f0ca0d545
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 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, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, 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
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
33
34 /* Value used by some passes to "recognize" noop moves as valid
35 instructions. */
36 #define NOOP_MOVE_INSN_CODE INT_MAX
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
55
56 enum rtx_class {
57 /* We check bit 0-1 of some rtx class codes in the predicates below. */
58
59 /* Bit 0 = comparison if 0, arithmetic is 1
60 Bit 1 = 1 if commutative. */
61 RTX_COMPARE, /* 0 */
62 RTX_COMM_COMPARE,
63 RTX_BIN_ARITH,
64 RTX_COMM_ARITH,
65
66 /* Must follow the four preceding values. */
67 RTX_UNARY, /* 4 */
68
69 RTX_EXTRA,
70 RTX_MATCH,
71 RTX_INSN,
72
73 /* Bit 0 = 1 if constant. */
74 RTX_OBJ, /* 8 */
75 RTX_CONST_OBJ,
76
77 RTX_TERNARY,
78 RTX_BITFIELD_OPS,
79 RTX_AUTOINC
80 };
81
82 #define RTX_OBJ_MASK (~1)
83 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
84 #define RTX_COMPARE_MASK (~1)
85 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
86 #define RTX_ARITHMETIC_MASK (~1)
87 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
88 #define RTX_BINARY_MASK (~3)
89 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
90 #define RTX_COMMUTATIVE_MASK (~2)
91 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
92 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
93 #define RTX_EXPR_FIRST (RTX_COMPARE)
94 #define RTX_EXPR_LAST (RTX_UNARY)
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_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 };
176 typedef union rtunion_def rtunion;
177
178 /* RTL expression ("rtx"). */
179
180 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
181 chain_prev ("RTX_PREV (&%h)")))
182 {
183 /* The kind of expression this is. */
184 ENUM_BITFIELD(rtx_code) code: 16;
185
186 /* The kind of value the expression has. */
187 ENUM_BITFIELD(machine_mode) mode : 8;
188
189 /* 1 in a MEM if we should keep the alias set for this mem unchanged
190 when we access a component.
191 1 in a CALL_INSN if it is a sibling call.
192 1 in a SET that is for a return.
193 In a CODE_LABEL, part of the two-bit alternate entry field. */
194 unsigned int jump : 1;
195 /* In a CODE_LABEL, part of the two-bit alternate entry field.
196 1 in a MEM if it cannot trap. */
197 unsigned int call : 1;
198 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
199 1 in a SUBREG if it references an unsigned object whose mode has been
200 from a promoted to a wider mode.
201 1 in a SYMBOL_REF if it addresses something in the per-function
202 constants pool.
203 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
204 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
205 unsigned int unchanging : 1;
206 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
207 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
208 if it has been deleted.
209 1 in a REG expression if corresponds to a variable declared by the user,
210 0 for an internally generated temporary.
211 1 in a SUBREG with a negative value.
212 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
213 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
214 unsigned int volatil : 1;
215 /* 1 in a MEM referring to a field of an aggregate.
216 0 if the MEM was a variable or the result of a * operator in C;
217 1 if it was the result of a . or -> operator (on a struct) in C.
218 1 in a REG if the register is used only in exit code a loop.
219 1 in a SUBREG expression if was generated from a variable with a
220 promoted mode.
221 1 in a CODE_LABEL if the label is used for nonlocal gotos
222 and must not be deleted even if its count is zero.
223 1 in a LABEL_REF if this is a reference to a label outside the
224 current loop.
225 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
226 together with the preceding insn. Valid only within sched.
227 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
228 from the target of a branch. Valid from reorg until end of compilation;
229 cleared before used.
230 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
231 dead code. Valid only during dead-code elimination phase; cleared
232 before use. */
233 unsigned int in_struct : 1;
234 /* At the end of RTL generation, 1 if this rtx is used. This is used for
235 copying shared structure. See `unshare_all_rtl'.
236 In a REG, this is not needed for that purpose, and used instead
237 in `leaf_renumber_regs_insn'.
238 1 in a SYMBOL_REF, means that emit_library_call
239 has used it as the function. */
240 unsigned int used : 1;
241 /* 1 in an INSN or a SET if this rtx is related to the call frame,
242 either changing how we compute the frame address or saving and
243 restoring registers in the prologue and epilogue.
244 1 in a REG or MEM if it is a pointer.
245 1 in a SYMBOL_REF if it addresses something in the per-function
246 constant string pool. */
247 unsigned frame_related : 1;
248 /* 1 in a REG or PARALLEL that is the current function's return value.
249 1 in a MEM if it refers to a scalar.
250 1 in a SYMBOL_REF for a weak symbol. */
251 unsigned return_val : 1;
252
253 /* The first element of the operands of this rtx.
254 The number of operands and their types are controlled
255 by the `code' field, according to rtl.def. */
256 union u {
257 rtunion fld[1];
258 HOST_WIDE_INT hwint[1];
259 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
260 };
261
262 /* The size in bytes of an rtx header (code, mode and flags). */
263 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
264
265 /* The size in bytes of an rtx with code CODE. */
266 #define RTX_SIZE(CODE) rtx_size[CODE]
267
268 #define NULL_RTX (rtx) 0
269
270 /* The "next" and "previous" RTX, relative to this one. */
271
272 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
273 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
274
275 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
276 */
277 #define RTX_PREV(X) ((INSN_P (X) \
278 || NOTE_P (X) \
279 || BARRIER_P (X) \
280 || LABEL_P (X)) \
281 && PREV_INSN (X) != NULL \
282 && NEXT_INSN (PREV_INSN (X)) == X \
283 ? PREV_INSN (X) : NULL)
284
285 /* Define macros to access the `code' field of the rtx. */
286
287 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
288 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
289
290 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
291 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
292
293 /* RTL vector. These appear inside RTX's when there is a need
294 for a variable number of things. The principle use is inside
295 PARALLEL expressions. */
296
297 struct rtvec_def GTY(()) {
298 int num_elem; /* number of elements */
299 rtx GTY ((length ("%h.num_elem"))) elem[1];
300 };
301
302 #define NULL_RTVEC (rtvec) 0
303
304 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
305 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
306
307 /* Predicate yielding nonzero iff X is an rtx for a register. */
308 #define REG_P(X) (GET_CODE (X) == REG)
309
310 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
311 #define MEM_P(X) (GET_CODE (X) == MEM)
312
313 /* Predicate yielding nonzero iff X is a label insn. */
314 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
315
316 /* Predicate yielding nonzero iff X is a jump insn. */
317 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
318
319 /* Predicate yielding nonzero iff X is a call insn. */
320 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
321
322 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
323 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
324
325 /* Predicate yielding nonzero iff X is a real insn. */
326 #define INSN_P(X) \
327 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
328
329 /* Predicate yielding nonzero iff X is a note insn. */
330 #define NOTE_P(X) (GET_CODE (X) == NOTE)
331
332 /* Predicate yielding nonzero iff X is a barrier insn. */
333 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
334
335 /* Predicate yielding nonzero iff X is a data for a jump table. */
336 #define JUMP_TABLE_DATA_P(INSN) \
337 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
338 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
339
340 /* 1 if X is a unary operator. */
341
342 #define UNARY_P(X) \
343 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
344
345 /* 1 if X is a binary operator. */
346
347 #define BINARY_P(X) \
348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
349
350 /* 1 if X is an arithmetic operator. */
351
352 #define ARITHMETIC_P(X) \
353 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
354 == RTX_ARITHMETIC_RESULT)
355
356 /* 1 if X is an arithmetic operator. */
357
358 #define COMMUTATIVE_ARITH_P(X) \
359 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
360
361 /* 1 if X is a commutative arithmetic operator or a comparison operator.
362 These two are sometimes selected together because it is possible to
363 swap the two operands. */
364
365 #define SWAPPABLE_OPERANDS_P(X) \
366 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
367 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
368 | (1 << RTX_COMPARE)))
369
370 /* 1 if X is a non-commutative operator. */
371
372 #define NON_COMMUTATIVE_P(X) \
373 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
374 == RTX_NON_COMMUTATIVE_RESULT)
375
376 /* 1 if X is a commutative operator on integers. */
377
378 #define COMMUTATIVE_P(X) \
379 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
380 == RTX_COMMUTATIVE_RESULT)
381
382 /* 1 if X is a relational operator. */
383
384 #define COMPARISON_P(X) \
385 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
386
387 /* 1 if X is a constant value that is an integer. */
388
389 #define CONSTANT_P(X) \
390 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
391 || GET_CODE (X) == CONST_VECTOR)
392
393 /* 1 if X can be used to represent an object. */
394 #define OBJECT_P(X) \
395 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
396
397 /* General accessor macros for accessing the fields of an rtx. */
398
399 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
400 /* The bit with a star outside the statement expr and an & inside is
401 so that N can be evaluated only once. */
402 #define RTL_CHECK1(RTX, N, C1) __extension__ \
403 (*({ rtx const _rtx = (RTX); const int _n = (N); \
404 const enum rtx_code _code = GET_CODE (_rtx); \
405 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
406 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
407 __FUNCTION__); \
408 if (GET_RTX_FORMAT(_code)[_n] != C1) \
409 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
410 __FUNCTION__); \
411 &_rtx->u.fld[_n]; }))
412
413 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
414 (*({ rtx const _rtx = (RTX); const int _n = (N); \
415 const enum rtx_code _code = GET_CODE (_rtx); \
416 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
417 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
418 __FUNCTION__); \
419 if (GET_RTX_FORMAT(_code)[_n] != C1 \
420 && GET_RTX_FORMAT(_code)[_n] != C2) \
421 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
422 __FUNCTION__); \
423 &_rtx->u.fld[_n]; }))
424
425 #define RTL_CHECKC1(RTX, N, C) __extension__ \
426 (*({ rtx const _rtx = (RTX); const int _n = (N); \
427 if (GET_CODE (_rtx) != (C)) \
428 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
429 __FUNCTION__); \
430 &_rtx->u.fld[_n]; }))
431
432 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
433 (*({ rtx const _rtx = (RTX); const int _n = (N); \
434 const enum rtx_code _code = GET_CODE (_rtx); \
435 if (_code != (C1) && _code != (C2)) \
436 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
437 __FUNCTION__); \
438 &_rtx->u.fld[_n]; }))
439
440 #define RTVEC_ELT(RTVEC, I) __extension__ \
441 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
442 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
443 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
444 __FUNCTION__); \
445 &_rtvec->elem[_i]; }))
446
447 #define XWINT(RTX, N) __extension__ \
448 (*({ rtx const _rtx = (RTX); const int _n = (N); \
449 const enum rtx_code _code = GET_CODE (_rtx); \
450 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
451 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
452 __FUNCTION__); \
453 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
454 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
455 __FUNCTION__); \
456 &_rtx->u.hwint[_n]; }))
457
458 #define XCWINT(RTX, N, C) __extension__ \
459 (*({ rtx const _rtx = (RTX); \
460 if (GET_CODE (_rtx) != (C)) \
461 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
462 __FUNCTION__); \
463 &_rtx->u.hwint[N]; }))
464
465 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
466 const char *)
467 ATTRIBUTE_NORETURN;
468 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
469 const char *)
470 ATTRIBUTE_NORETURN;
471 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
472 int, const char *)
473 ATTRIBUTE_NORETURN;
474 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
475 int, const char *)
476 ATTRIBUTE_NORETURN;
477 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
478 const char *, int, const char *)
479 ATTRIBUTE_NORETURN;
480 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
481 const char *)
482 ATTRIBUTE_NORETURN;
483
484 #else /* not ENABLE_RTL_CHECKING */
485
486 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
487 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
488 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
489 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
490 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
491 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
492 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
493
494 #endif
495
496 /* General accessor macros for accessing the flags of an rtx. */
497
498 /* Access an individual rtx flag, with no checking of any kind. */
499 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
500
501 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
502 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
503 ({ rtx const _rtx = (RTX); \
504 if (GET_CODE(_rtx) != C1) \
505 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
506 __FUNCTION__); \
507 _rtx; })
508
509 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
510 ({ rtx const _rtx = (RTX); \
511 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
512 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
513 __FUNCTION__); \
514 _rtx; })
515
516 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
517 ({ rtx const _rtx = (RTX); \
518 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
519 && GET_CODE(_rtx) != C3) \
520 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
521 __FUNCTION__); \
522 _rtx; })
523
524 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
525 ({ rtx const _rtx = (RTX); \
526 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
527 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
528 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
529 __FUNCTION__); \
530 _rtx; })
531
532 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
533 ({ rtx const _rtx = (RTX); \
534 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
535 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
536 && GET_CODE(_rtx) != C5) \
537 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
538 __FUNCTION__); \
539 _rtx; })
540
541 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
542 __extension__ \
543 ({ rtx const _rtx = (RTX); \
544 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
545 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
546 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
547 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
548 __FUNCTION__); \
549 _rtx; })
550
551 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
552 __extension__ \
553 ({ rtx const _rtx = (RTX); \
554 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
555 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
556 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
557 && GET_CODE(_rtx) != C7) \
558 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
559 __FUNCTION__); \
560 _rtx; })
561
562 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
563 __extension__ \
564 ({ rtx const _rtx = (RTX); \
565 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
566 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
567 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
568 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
569 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
570 __FUNCTION__); \
571 _rtx; })
572
573 extern void rtl_check_failed_flag (const char *, rtx, const char *,
574 int, const char *)
575 ATTRIBUTE_NORETURN
576 ;
577
578 #else /* not ENABLE_RTL_FLAG_CHECKING */
579
580 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
581 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
582 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
583 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
584 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
585 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
586 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
587 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
588 #endif
589
590 #define CLEAR_RTX_FLAGS(RTX) \
591 do { \
592 rtx const _rtx = (RTX); \
593 _rtx->jump = 0; \
594 _rtx->call = 0; \
595 _rtx->unchanging = 0; \
596 _rtx->volatil = 0; \
597 _rtx->in_struct = 0; \
598 _rtx->used = 0; \
599 _rtx->frame_related = 0; \
600 _rtx->return_val = 0; \
601 } while (0)
602
603 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
604 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
605 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
606 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
607 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
608 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
609 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
610 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
611 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
612
613 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
614 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
615
616 /* These are like XINT, etc. except that they expect a '0' field instead
617 of the normal type code. */
618
619 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
620 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
621 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
622 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
623 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
624 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
625 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
626 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
627 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
628 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
629 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
630 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
631 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
632
633 /* Access a '0' field with any type. */
634 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
635
636 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
637 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
638 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
639 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
640 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
641 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
642 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
643 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
644 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
645 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
646 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
647
648 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
649 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
650
651 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
652 \f
653 /* ACCESS MACROS for particular fields of insns. */
654
655 /* Holds a unique number for each insn.
656 These are not necessarily sequentially increasing. */
657 #define INSN_UID(INSN) XINT (INSN, 0)
658
659 /* Chain insns together in sequence. */
660 #define PREV_INSN(INSN) XEXP (INSN, 1)
661 #define NEXT_INSN(INSN) XEXP (INSN, 2)
662
663 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
664 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
665 /* The body of an insn. */
666 #define PATTERN(INSN) XEXP (INSN, 5)
667
668 /* Code number of instruction, from when it was recognized.
669 -1 means this instruction has not been recognized yet. */
670 #define INSN_CODE(INSN) XINT (INSN, 6)
671
672 /* Set up in flow.c; empty before then.
673 Holds a chain of INSN_LIST rtx's whose first operands point at
674 previous insns with direct data-flow connections to this one.
675 That means that those insns set variables whose next use is in this insn.
676 They are always in the same basic block as this insn. */
677 #define LOG_LINKS(INSN) XEXP(INSN, 7)
678
679 #define RTX_FRAME_RELATED_P(RTX) \
680 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
681 JUMP_INSN, BARRIER, SET)->frame_related)
682
683 /* 1 if RTX is an insn that has been deleted. */
684 #define INSN_DELETED_P(RTX) \
685 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
686 CODE_LABEL, BARRIER, NOTE)->volatil)
687
688 /* 1 if RTX is a call to a const or pure function. */
689 #define CONST_OR_PURE_CALL_P(RTX) \
690 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
691 EXPR_LIST)->unchanging)
692
693 /* 1 if RTX is a call_insn for a sibling call. */
694 #define SIBLING_CALL_P(RTX) \
695 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
696
697 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
698 #define INSN_ANNULLED_BRANCH_P(RTX) \
699 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
700
701 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
702 elimination phase. */
703 #define INSN_DEAD_CODE_P(RTX) \
704 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
705
706 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
707 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
708 executed if the branch is taken. For annulled branches with this bit
709 clear, the insn should be executed only if the branch is not taken. */
710 #define INSN_FROM_TARGET_P(RTX) \
711 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
712
713 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
714
715 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
716
717 /* Holds a list of notes on what this insn does to various REGs.
718 It is a chain of EXPR_LIST rtx's, where the second operand is the
719 chain pointer and the first operand is the REG being described.
720 The mode field of the EXPR_LIST contains not a real machine mode
721 but a value from enum reg_note. */
722
723 #define REG_NOTES(INSN) XEXP(INSN, 8)
724
725 enum reg_note
726 {
727 #define DEF_REG_NOTE(NAME) NAME,
728 #include "reg-notes.def"
729 #undef DEF_REG_NOTE
730 REG_NOTE_MAX
731 };
732
733 /* The base value for branch probability notes. */
734 #define REG_BR_PROB_BASE 10000
735
736 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
737 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
738 #define PUT_REG_NOTE_KIND(LINK, KIND) \
739 PUT_MODE (LINK, (enum machine_mode) (KIND))
740
741 /* Names for REG_NOTE's in EXPR_LIST insn's. */
742
743 extern const char * const reg_note_name[];
744 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
745
746 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
747 USE and CLOBBER expressions.
748 USE expressions list the registers filled with arguments that
749 are passed to the function.
750 CLOBBER expressions document the registers explicitly clobbered
751 by this CALL_INSN.
752 Pseudo registers can not be mentioned in this list. */
753 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
754
755 /* The label-number of a code-label. The assembler label
756 is made from `L' and the label-number printed in decimal.
757 Label numbers are unique in a compilation. */
758 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
759
760 #define LINE_NUMBER NOTE
761
762 /* In a NOTE that is a line number, this is a string for the file name that the
763 line is in. We use the same field to record block numbers temporarily in
764 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
765 between ints and pointers if we use a different macro for the block number.)
766 */
767
768 /* Opaque data. */
769 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
770 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
771 #ifdef USE_MAPPED_LOCATION
772 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
773 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
774 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
775 #define SET_INSN_DELETED(INSN) \
776 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
777 #else
778 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
779 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
780 (XLOC).line = NOTE_LINE_NUMBER (INSN))
781 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
782 #define SET_INSN_DELETED(INSN) \
783 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
784 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
785 #endif
786 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
787 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
788 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
789 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
790 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
791 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE)
792 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
793
794 /* In a NOTE that is a line number, this is the line number.
795 Other kinds of NOTEs are identified by negative numbers here. */
796 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
797
798 /* Nonzero if INSN is a note marking the beginning of a basic block. */
799 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
800 (GET_CODE (INSN) == NOTE \
801 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
802
803 /* Algorithm and flags for prediction. */
804 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
805 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
806 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
807
808 /* Variable declaration and the location of a variable. */
809 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
810 0, VAR_LOCATION))
811 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
812 1, VAR_LOCATION))
813
814 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
815 that are not line numbers. These codes are all negative.
816
817 Notice that we do not try to use zero here for any of
818 the special note codes because sometimes the source line
819 actually can be zero! This happens (for example) when we
820 are generating code for the per-translation-unit constructor
821 and destructor routines for some C++ translation unit. */
822
823 enum insn_note
824 {
825 /* Keep all of these numbers negative. Adjust as needed. */
826 NOTE_INSN_BIAS = -100,
827
828 #define DEF_INSN_NOTE(NAME) NAME,
829 #include "insn-notes.def"
830 #undef DEF_INSN_NOTE
831
832 NOTE_INSN_MAX
833 };
834
835 /* Names for NOTE insn's other than line numbers. */
836
837 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
838 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
839 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
840
841 /* The name of a label, in case it corresponds to an explicit label
842 in the input source code. */
843 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
844
845 /* In jump.c, each label contains a count of the number
846 of LABEL_REFs that point at it, so unused labels can be deleted. */
847 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
848
849 /* Labels carry a two-bit field composed of the ->jump and ->call
850 bits. This field indicates whether the label is an alternate
851 entry point, and if so, what kind. */
852 enum label_kind
853 {
854 LABEL_NORMAL = 0, /* ordinary label */
855 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
856 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
857 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
858 };
859
860 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
861
862 /* Retrieve the kind of LABEL. */
863 #define LABEL_KIND(LABEL) __extension__ \
864 ({ rtx const _label = (LABEL); \
865 if (GET_CODE (_label) != CODE_LABEL) \
866 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
867 __FUNCTION__); \
868 (enum label_kind) ((_label->jump << 1) | _label->call); })
869
870 /* Set the kind of LABEL. */
871 #define SET_LABEL_KIND(LABEL, KIND) do { \
872 rtx _label = (LABEL); \
873 unsigned int _kind = (KIND); \
874 if (GET_CODE (_label) != CODE_LABEL) \
875 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
876 __FUNCTION__); \
877 _label->jump = ((_kind >> 1) & 1); \
878 _label->call = (_kind & 1); \
879 } while (0)
880
881 #else
882
883 /* Retrieve the kind of LABEL. */
884 #define LABEL_KIND(LABEL) \
885 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
886
887 /* Set the kind of LABEL. */
888 #define SET_LABEL_KIND(LABEL, KIND) do { \
889 rtx _label = (LABEL); \
890 unsigned int _kind = (KIND); \
891 _label->jump = ((_kind >> 1) & 1); \
892 _label->call = (_kind & 1); \
893 } while (0)
894
895 #endif /* rtl flag checking */
896
897 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
898
899 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
900 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
901 be decremented and possibly the label can be deleted. */
902 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
903
904 /* Once basic blocks are found in flow.c,
905 each CODE_LABEL starts a chain that goes through
906 all the LABEL_REFs that jump to that label.
907 The chain eventually winds up at the CODE_LABEL: it is circular. */
908 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
909 \f
910 /* This is the field in the LABEL_REF through which the circular chain
911 of references to a particular label is linked.
912 This chain is set up in flow.c. */
913
914 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
915
916 /* Once basic blocks are found in flow.c,
917 Each LABEL_REF points to its containing instruction with this field. */
918
919 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
920
921 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
922 the number the register originally had; for a pseudo register turned into
923 a hard reg this will hold the old pseudo register number. */
924
925 #define REGNO(RTX) XCUINT (RTX, 0, REG)
926 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
927
928 /* 1 if RTX is a reg or parallel that is the current function's return
929 value. */
930 #define REG_FUNCTION_VALUE_P(RTX) \
931 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
932
933 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
934 #define REG_USERVAR_P(RTX) \
935 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
936
937 /* 1 if RTX is a reg that holds a pointer value. */
938 #define REG_POINTER(RTX) \
939 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
940
941 /* 1 if RTX is a mem that holds a pointer value. */
942 #define MEM_POINTER(RTX) \
943 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
944
945 /* 1 if the given register REG corresponds to a hard register. */
946 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
947
948 /* 1 if the given register number REG_NO corresponds to a hard register. */
949 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
950
951 /* For a CONST_INT rtx, INTVAL extracts the integer. */
952
953 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
954
955 /* For a CONST_DOUBLE:
956 For a DImode, there are two integers CONST_DOUBLE_LOW is the
957 low-order word and ..._HIGH the high-order.
958 For a float, there is a REAL_VALUE_TYPE structure, and
959 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
960 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
961 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
962 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
963
964 /* For a CONST_VECTOR, return element #n. */
965 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
966
967 /* For a CONST_VECTOR, return the number of elements in a vector. */
968 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
969
970 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
971 SUBREG_BYTE extracts the byte-number. */
972
973 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
974 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
975
976 /* in rtlanal.c */
977 /* Return the right cost to give to an operation
978 to make the cost of the corresponding register-to-register instruction
979 N times that of a fast register-to-register instruction. */
980 #define COSTS_N_INSNS(N) ((N) * 4)
981
982 /* Maximum cost of an rtl expression. This value has the special meaning
983 not to use an rtx with this cost under any circumstances. */
984 #define MAX_COST INT_MAX
985
986 extern int rtx_cost (rtx, enum rtx_code);
987 extern int address_cost (rtx, enum machine_mode);
988 extern unsigned int subreg_lsb (rtx);
989 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
990 unsigned int);
991 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
992 unsigned int, enum machine_mode);
993 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
994 unsigned int, enum machine_mode);
995 extern unsigned int subreg_regno (rtx);
996 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
997 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
998
999
1000 /* 1 if RTX is a subreg containing a reg that is already known to be
1001 sign- or zero-extended from the mode of the subreg to the mode of
1002 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1003 extension.
1004
1005 When used as a LHS, is means that this extension must be done
1006 when assigning to SUBREG_REG. */
1007
1008 #define SUBREG_PROMOTED_VAR_P(RTX) \
1009 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1010
1011 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1012 do { \
1013 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1014 if ((VAL) < 0) \
1015 _rtx->volatil = 1; \
1016 else { \
1017 _rtx->volatil = 0; \
1018 _rtx->unchanging = (VAL); \
1019 } \
1020 } while (0)
1021 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1022 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1023 ? -1 : (RTX)->unchanging)
1024
1025 /* Access various components of an ASM_OPERANDS rtx. */
1026
1027 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1028 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1029 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1030 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1031 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1032 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1033 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1034 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1035 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1036 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1037 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1038 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1039 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1040 #ifdef USE_MAPPED_LOCATION
1041 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1042 #else
1043 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1044 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1045 #endif
1046
1047 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1048 #define MEM_READONLY_P(RTX) \
1049 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1050
1051 /* 1 if RTX is a mem and we should keep the alias set for this mem
1052 unchanged when we access a component. Set to 1, or example, when we
1053 are already in a non-addressable component of an aggregate. */
1054 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1055 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1056
1057 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1058 #define MEM_VOLATILE_P(RTX) \
1059 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1060 ASM_INPUT)->volatil)
1061
1062 /* 1 if RTX is a mem that refers to an aggregate, either to the
1063 aggregate itself of to a field of the aggregate. If zero, RTX may
1064 or may not be such a reference. */
1065 #define MEM_IN_STRUCT_P(RTX) \
1066 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1067
1068 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1069 not refer to a scalar. */
1070 #define MEM_SCALAR_P(RTX) \
1071 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1072
1073 /* 1 if RTX is a mem that cannot trap. */
1074 #define MEM_NOTRAP_P(RTX) \
1075 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1076
1077 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1078 RTX. Otherwise, vice versa. Use this macro only when you are
1079 *sure* that you know that the MEM is in a structure, or is a
1080 scalar. VAL is evaluated only once. */
1081 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1082 do { \
1083 if (VAL) \
1084 { \
1085 MEM_IN_STRUCT_P (RTX) = 1; \
1086 MEM_SCALAR_P (RTX) = 0; \
1087 } \
1088 else \
1089 { \
1090 MEM_IN_STRUCT_P (RTX) = 0; \
1091 MEM_SCALAR_P (RTX) = 1; \
1092 } \
1093 } while (0)
1094
1095 /* The memory attribute block. We provide access macros for each value
1096 in the block and provide defaults if none specified. */
1097 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1098
1099 /* The register attribute block. We provide access macros for each value
1100 in the block and provide defaults if none specified. */
1101 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1102
1103 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1104 set, and may alias anything. Otherwise, the MEM can only alias
1105 MEMs in a conflicting alias set. This value is set in a
1106 language-dependent manner in the front-end, and should not be
1107 altered in the back-end. These set numbers are tested with
1108 alias_sets_conflict_p. */
1109 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1110
1111 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1112 refer to part of a DECL. It may also be a COMPONENT_REF. */
1113 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1114
1115 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1116 RTX that is always a CONST_INT. */
1117 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1118
1119 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1120 is always a CONST_INT. */
1121 #define MEM_SIZE(RTX) \
1122 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1123 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1124 : 0)
1125
1126 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1127 mode as a default when STRICT_ALIGNMENT, but not if not. */
1128 #define MEM_ALIGN(RTX) \
1129 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1130 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1131 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1132
1133 /* For a REG rtx, the decl it is known to refer to, if it is known to
1134 refer to part of a DECL. */
1135 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1136
1137 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1138 RTX that is always a CONST_INT. */
1139 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1140
1141 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1142 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1143 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1144 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1145 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1146 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1147 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1148 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1149 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1150
1151 /* 1 if RTX is a label_ref to a label outside the loop containing the
1152 reference. */
1153 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1154 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1155
1156 /* 1 if RTX is a label_ref for a nonlocal label. */
1157 /* Likewise in an expr_list for a reg_label note. */
1158 #define LABEL_REF_NONLOCAL_P(RTX) \
1159 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1160 REG_LABEL)->volatil)
1161
1162 /* 1 if RTX is a code_label that should always be considered to be needed. */
1163 #define LABEL_PRESERVE_P(RTX) \
1164 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1165
1166 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1167 #define REG_LOOP_TEST_P(RTX) \
1168 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1169
1170 /* During sched, 1 if RTX is an insn that must be scheduled together
1171 with the preceding insn. */
1172 #define SCHED_GROUP_P(RTX) \
1173 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1174 )->in_struct)
1175
1176 /* For a SET rtx, SET_DEST is the place that is set
1177 and SET_SRC is the value it is set to. */
1178 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1179 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1180 #define SET_IS_RETURN_P(RTX) \
1181 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1182
1183 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1184 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1185 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1186
1187 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1188 conditionally executing the code on, COND_EXEC_CODE is the code
1189 to execute if the condition is true. */
1190 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1191 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1192
1193 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1194 constants pool. */
1195 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1196 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1197
1198 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1199 tree constant pool. This information is private to varasm.c. */
1200 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1201 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1202 (RTX), SYMBOL_REF)->frame_related)
1203
1204 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1205 #define SYMBOL_REF_FLAG(RTX) \
1206 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1207
1208 /* 1 if RTX is a symbol_ref that has been the library function in
1209 emit_library_call. */
1210 #define SYMBOL_REF_USED(RTX) \
1211 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1212
1213 /* 1 if RTX is a symbol_ref for a weak symbol. */
1214 #define SYMBOL_REF_WEAK(RTX) \
1215 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1216
1217 /* The tree (decl or constant) associated with the symbol, or null. */
1218 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1219
1220 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1221 information derivable from the tree decl associated with this symbol.
1222 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1223 decl. In some cases this is a bug. But beyond that, it's nice to cache
1224 this information to avoid recomputing it. Finally, this allows space for
1225 the target to store more than one bit of information, as with
1226 SYMBOL_REF_FLAG. */
1227 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1228
1229 /* These flags are common enough to be defined for all targets. They
1230 are computed by the default version of targetm.encode_section_info. */
1231
1232 /* Set if this symbol is a function. */
1233 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1234 #define SYMBOL_REF_FUNCTION_P(RTX) \
1235 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1236 /* Set if targetm.binds_local_p is true. */
1237 #define SYMBOL_FLAG_LOCAL (1 << 1)
1238 #define SYMBOL_REF_LOCAL_P(RTX) \
1239 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1240 /* Set if targetm.in_small_data_p is true. */
1241 #define SYMBOL_FLAG_SMALL (1 << 2)
1242 #define SYMBOL_REF_SMALL_P(RTX) \
1243 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1244 /* The three-bit field at [5:3] is true for TLS variables; use
1245 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1246 #define SYMBOL_FLAG_TLS_SHIFT 3
1247 #define SYMBOL_REF_TLS_MODEL(RTX) \
1248 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1249 /* Set if this symbol is not defined in this translation unit. */
1250 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1251 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1252 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1253
1254 /* Subsequent bits are available for the target to use. */
1255 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1256 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1257
1258 /* Define a macro to look for REG_INC notes,
1259 but save time on machines where they never exist. */
1260
1261 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1262 #define FIND_REG_INC_NOTE(INSN, REG) \
1263 ((REG) != NULL_RTX && REG_P ((REG)) \
1264 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1265 : find_reg_note ((INSN), REG_INC, (REG)))
1266 #else
1267 #define FIND_REG_INC_NOTE(INSN, REG) 0
1268 #endif
1269
1270 /* Indicate whether the machine has any sort of auto increment addressing.
1271 If not, we can avoid checking for REG_INC notes. */
1272
1273 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1274 #define AUTO_INC_DEC
1275 #endif
1276
1277 #ifndef HAVE_PRE_INCREMENT
1278 #define HAVE_PRE_INCREMENT 0
1279 #endif
1280
1281 #ifndef HAVE_PRE_DECREMENT
1282 #define HAVE_PRE_DECREMENT 0
1283 #endif
1284
1285 #ifndef HAVE_POST_INCREMENT
1286 #define HAVE_POST_INCREMENT 0
1287 #endif
1288
1289 #ifndef HAVE_POST_DECREMENT
1290 #define HAVE_POST_DECREMENT 0
1291 #endif
1292
1293 #ifndef HAVE_POST_MODIFY_DISP
1294 #define HAVE_POST_MODIFY_DISP 0
1295 #endif
1296
1297 #ifndef HAVE_POST_MODIFY_REG
1298 #define HAVE_POST_MODIFY_REG 0
1299 #endif
1300
1301 #ifndef HAVE_PRE_MODIFY_DISP
1302 #define HAVE_PRE_MODIFY_DISP 0
1303 #endif
1304
1305 #ifndef HAVE_PRE_MODIFY_REG
1306 #define HAVE_PRE_MODIFY_REG 0
1307 #endif
1308
1309
1310 /* Some architectures do not have complete pre/post increment/decrement
1311 instruction sets, or only move some modes efficiently. These macros
1312 allow us to tune autoincrement generation. */
1313
1314 #ifndef USE_LOAD_POST_INCREMENT
1315 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1316 #endif
1317
1318 #ifndef USE_LOAD_POST_DECREMENT
1319 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1320 #endif
1321
1322 #ifndef USE_LOAD_PRE_INCREMENT
1323 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1324 #endif
1325
1326 #ifndef USE_LOAD_PRE_DECREMENT
1327 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1328 #endif
1329
1330 #ifndef USE_STORE_POST_INCREMENT
1331 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1332 #endif
1333
1334 #ifndef USE_STORE_POST_DECREMENT
1335 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1336 #endif
1337
1338 #ifndef USE_STORE_PRE_INCREMENT
1339 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1340 #endif
1341
1342 #ifndef USE_STORE_PRE_DECREMENT
1343 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1344 #endif
1345 \f
1346 /* Nonzero when we are generating CONCATs. */
1347 extern int generating_concat_p;
1348
1349 /* Nonzero when we are expanding trees to RTL. */
1350 extern int currently_expanding_to_rtl;
1351
1352 /* Generally useful functions. */
1353
1354 /* In expmed.c */
1355 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1356
1357 /* In builtins.c */
1358 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1359 extern void purge_builtin_constant_p (void);
1360
1361 /* In explow.c */
1362 extern void set_stack_check_libfunc (rtx);
1363 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1364 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1365 extern void optimize_save_area_alloca (void);
1366
1367 /* In emit-rtl.c */
1368 extern rtvec gen_rtvec (int, ...);
1369 extern rtx copy_insn_1 (rtx);
1370 extern rtx copy_insn (rtx);
1371 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1372 extern rtx emit_copy_of_insn_after (rtx, rtx);
1373 extern void set_reg_attrs_from_mem (rtx, rtx);
1374 extern void set_mem_attrs_from_reg (rtx, rtx);
1375 extern void set_reg_attrs_for_parm (rtx, rtx);
1376 extern void set_reg_pointer_align (rtx, unsigned int);
1377 extern int mem_expr_equal_p (tree, tree);
1378
1379 /* In rtl.c */
1380 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1381 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1382
1383 extern rtvec rtvec_alloc (int);
1384 extern rtx copy_rtx (rtx);
1385 extern void dump_rtx_statistics (void);
1386
1387 /* In emit-rtl.c */
1388 extern rtx copy_rtx_if_shared (rtx);
1389
1390 /* In rtl.c */
1391 extern rtx copy_most_rtx (rtx, rtx);
1392 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1393 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1394 extern int rtx_equal_p (rtx, rtx);
1395
1396 /* In emit-rtl.c */
1397 extern rtvec gen_rtvec_v (int, rtx *);
1398 extern rtx gen_reg_rtx (enum machine_mode);
1399 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1400 extern rtx gen_label_rtx (void);
1401 extern int subreg_hard_regno (rtx, int);
1402 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1403
1404 /* In cse.c */
1405 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1406
1407 /* In emit-rtl.c */
1408 extern rtx gen_highpart (enum machine_mode, rtx);
1409 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1410 extern rtx gen_realpart (enum machine_mode, rtx);
1411 extern rtx gen_imagpart (enum machine_mode, rtx);
1412 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1413
1414 /* In emit-rtl.c */
1415 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1416 extern int subreg_lowpart_p (rtx);
1417 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1418 enum machine_mode);
1419 extern unsigned int subreg_highpart_offset (enum machine_mode,
1420 enum machine_mode);
1421 extern rtx make_safe_from (rtx, rtx);
1422 extern rtx convert_memory_address (enum machine_mode, rtx);
1423 extern rtx get_insns (void);
1424 extern const char *get_insn_name (int);
1425 extern rtx get_last_insn (void);
1426 extern rtx get_last_insn_anywhere (void);
1427 extern rtx get_first_nonnote_insn (void);
1428 extern rtx get_last_nonnote_insn (void);
1429 extern void start_sequence (void);
1430 extern void push_to_sequence (rtx);
1431 extern void end_sequence (void);
1432 extern void push_to_full_sequence (rtx, rtx);
1433 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1434 enum machine_mode);
1435
1436 /* In varasm.c */
1437 extern rtx force_const_mem (enum machine_mode, rtx);
1438
1439 /* In varasm.c */
1440
1441 struct function;
1442 extern rtx get_pool_constant (rtx);
1443 extern rtx get_pool_constant_mark (rtx, bool *);
1444 extern enum machine_mode get_pool_mode (rtx);
1445 extern rtx get_pool_constant_for_function (struct function *, rtx);
1446 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1447 extern int get_pool_offset (rtx);
1448 extern rtx simplify_subtraction (rtx);
1449
1450 /* In function.c */
1451 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1452 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1453 extern rtx assign_stack_temp_for_type (enum machine_mode,
1454 HOST_WIDE_INT, int, tree);
1455 extern rtx assign_temp (tree, int, int, int);
1456
1457 /* In emit-rtl.c */
1458 extern rtx emit_insn_before (rtx, rtx);
1459 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1460 extern rtx emit_jump_insn_before (rtx, rtx);
1461 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1462 extern rtx emit_call_insn_before (rtx, rtx);
1463 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1464 extern rtx emit_barrier_before (rtx);
1465 extern rtx emit_label_before (rtx, rtx);
1466 extern rtx emit_note_before (int, rtx);
1467 extern rtx emit_insn_after (rtx, rtx);
1468 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1469 extern rtx emit_jump_insn_after (rtx, rtx);
1470 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1471 extern rtx emit_call_insn_after (rtx, rtx);
1472 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1473 extern rtx emit_barrier_after (rtx);
1474 extern rtx emit_label_after (rtx, rtx);
1475 extern rtx emit_note_after (int, rtx);
1476 extern rtx emit_note_copy_after (rtx, rtx);
1477 extern rtx emit_insn (rtx);
1478 extern rtx emit_jump_insn (rtx);
1479 extern rtx emit_call_insn (rtx);
1480 extern rtx emit_label (rtx);
1481 extern rtx emit_barrier (void);
1482 extern rtx emit_note (int);
1483 extern rtx emit_note_copy (rtx);
1484 extern rtx emit_line_note (location_t);
1485 extern rtx make_insn_raw (rtx);
1486 extern void add_function_usage_to (rtx, rtx);
1487 extern rtx last_call_insn (void);
1488 extern rtx previous_insn (rtx);
1489 extern rtx next_insn (rtx);
1490 extern rtx prev_nonnote_insn (rtx);
1491 extern rtx next_nonnote_insn (rtx);
1492 extern rtx prev_real_insn (rtx);
1493 extern rtx next_real_insn (rtx);
1494 extern rtx prev_active_insn (rtx);
1495 extern rtx next_active_insn (rtx);
1496 extern int active_insn_p (rtx);
1497 extern rtx prev_label (rtx);
1498 extern rtx next_label (rtx);
1499 extern rtx skip_consecutive_labels (rtx);
1500 extern rtx next_cc0_user (rtx);
1501 extern rtx prev_cc0_setter (rtx);
1502
1503 #define emit_insn_before_sameloc(INSN, BEFORE) \
1504 emit_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1505 #define emit_jump_insn_before_sameloc(INSN, BEFORE) \
1506 emit_jump_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1507 #define emit_call_insn_before_sameloc(INSN, BEFORE) \
1508 emit_call_insn_before_setloc (INSN, BEFORE, INSN_LOCATOR (BEFORE))
1509 #define emit_insn_after_sameloc(INSN, AFTER) \
1510 emit_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1511 #define emit_jump_insn_after_sameloc(INSN, AFTER) \
1512 emit_jump_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1513 #define emit_call_insn_after_sameloc(INSN, AFTER) \
1514 emit_call_insn_after_setloc (INSN, AFTER, INSN_LOCATOR (AFTER))
1515
1516 /* In cfglayout.c */
1517 extern tree choose_inner_scope (tree, tree);
1518 extern int insn_line (rtx);
1519 extern const char * insn_file (rtx);
1520 extern int locator_line (int);
1521 extern const char * locator_file (int);
1522 extern int prologue_locator, epilogue_locator;
1523
1524 /* In jump.c */
1525 extern enum rtx_code reverse_condition (enum rtx_code);
1526 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1527 extern enum rtx_code swap_condition (enum rtx_code);
1528 extern enum rtx_code unsigned_condition (enum rtx_code);
1529 extern enum rtx_code signed_condition (enum rtx_code);
1530 extern void mark_jump_label (rtx, rtx, int);
1531 extern void cleanup_barriers (void);
1532
1533 /* In jump.c */
1534 extern bool squeeze_notes (rtx *, rtx *);
1535 extern rtx delete_related_insns (rtx);
1536 extern void delete_jump (rtx);
1537 extern void delete_barrier (rtx);
1538 extern rtx get_label_before (rtx);
1539 extern rtx get_label_after (rtx);
1540 extern rtx follow_jumps (rtx);
1541
1542 /* In recog.c */
1543 extern rtx *find_constant_term_loc (rtx *);
1544
1545 /* In emit-rtl.c */
1546 extern rtx try_split (rtx, rtx, int);
1547 extern int split_branch_probability;
1548
1549 /* In unknown file */
1550 extern rtx split_insns (rtx, rtx);
1551
1552 /* In simplify-rtx.c */
1553 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1554 enum machine_mode);
1555 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1556 rtx);
1557 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1558 enum machine_mode, rtx, rtx, rtx);
1559 extern rtx simplify_const_relational_operation (enum rtx_code,
1560 enum machine_mode, rtx, rtx);
1561 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1562 enum machine_mode, rtx, rtx);
1563 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1564 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1565 enum machine_mode);
1566 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1567 enum machine_mode, rtx, rtx, rtx);
1568 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1569 enum machine_mode, rtx, rtx);
1570 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1571 unsigned int);
1572 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1573 unsigned int);
1574 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1575 extern rtx simplify_rtx (rtx);
1576 extern rtx avoid_constant_pool_reference (rtx);
1577
1578 /* In regclass.c */
1579 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1580 bool);
1581
1582 /* In emit-rtl.c */
1583 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1584
1585 /* Functions in rtlanal.c */
1586
1587 /* Single set is implemented as macro for performance reasons. */
1588 #define single_set(I) (INSN_P (I) \
1589 ? (GET_CODE (PATTERN (I)) == SET \
1590 ? PATTERN (I) : single_set_1 (I)) \
1591 : NULL_RTX)
1592 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1593
1594 /* Structure used for passing data to REPLACE_LABEL. */
1595 typedef struct replace_label_data
1596 {
1597 rtx r1;
1598 rtx r2;
1599 bool update_label_nuses;
1600 } replace_label_data;
1601
1602 extern int rtx_addr_can_trap_p (rtx);
1603 extern bool nonzero_address_p (rtx);
1604 extern int rtx_unstable_p (rtx);
1605 extern int rtx_varies_p (rtx, int);
1606 extern int rtx_addr_varies_p (rtx, int);
1607 extern HOST_WIDE_INT get_integer_term (rtx);
1608 extern rtx get_related_value (rtx);
1609 extern rtx get_jump_table_offset (rtx, rtx *);
1610 extern int global_reg_mentioned_p (rtx);
1611 extern int reg_mentioned_p (rtx, rtx);
1612 extern int count_occurrences (rtx, rtx, int);
1613 extern int reg_referenced_p (rtx, rtx);
1614 extern int reg_used_between_p (rtx, rtx, rtx);
1615 extern int reg_referenced_between_p (rtx, rtx, rtx);
1616 extern int reg_set_between_p (rtx, rtx, rtx);
1617 extern int regs_set_between_p (rtx, rtx, rtx);
1618 extern int commutative_operand_precedence (rtx);
1619 extern int swap_commutative_operands_p (rtx, rtx);
1620 extern int modified_between_p (rtx, rtx, rtx);
1621 extern int no_labels_between_p (rtx, rtx);
1622 extern int no_jumps_between_p (rtx, rtx);
1623 extern int modified_in_p (rtx, rtx);
1624 extern int insn_dependent_p (rtx, rtx);
1625 extern int reg_set_p (rtx, rtx);
1626 extern rtx single_set_2 (rtx, rtx);
1627 extern int multiple_sets (rtx);
1628 extern int set_noop_p (rtx);
1629 extern int noop_move_p (rtx);
1630 extern rtx find_last_value (rtx, rtx *, rtx, int);
1631 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1632 extern int reg_overlap_mentioned_p (rtx, rtx);
1633 extern rtx set_of (rtx, rtx);
1634 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1635 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1636 extern int dead_or_set_p (rtx, rtx);
1637 extern int dead_or_set_regno_p (rtx, unsigned int);
1638 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1639 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1640 extern rtx find_reg_equal_equiv_note (rtx);
1641 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1642 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1643 extern int pure_call_p (rtx);
1644 extern void remove_note (rtx, rtx);
1645 extern int side_effects_p (rtx);
1646 extern int volatile_refs_p (rtx);
1647 extern int volatile_insn_p (rtx);
1648 extern int may_trap_p (rtx);
1649 extern int inequality_comparisons_p (rtx);
1650 extern rtx replace_rtx (rtx, rtx, rtx);
1651 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1652 extern int replace_label (rtx *, void *);
1653 extern int rtx_referenced_p (rtx, rtx);
1654 extern bool tablejump_p (rtx, rtx *, rtx *);
1655 extern int computed_jump_p (rtx);
1656 typedef int (*rtx_function) (rtx *, void *);
1657 extern int for_each_rtx (rtx *, rtx_function, void *);
1658 extern rtx regno_use_in (unsigned int, rtx);
1659 extern int auto_inc_p (rtx);
1660 extern int in_expr_list_p (rtx, rtx);
1661 extern void remove_node_from_expr_list (rtx, rtx *);
1662 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1663 extern int loc_mentioned_in_p (rtx *, rtx);
1664 extern rtx find_first_parameter_load (rtx, rtx);
1665 extern bool keep_with_call_p (rtx);
1666 extern bool label_is_jump_target_p (rtx, rtx);
1667 extern int insn_rtx_cost (rtx);
1668
1669 /* flow.c */
1670
1671 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1672
1673 /* lists.c */
1674
1675 void free_EXPR_LIST_list (rtx *);
1676 void free_INSN_LIST_list (rtx *);
1677 void free_EXPR_LIST_node (rtx);
1678 void free_INSN_LIST_node (rtx);
1679 rtx alloc_INSN_LIST (rtx, rtx);
1680 rtx alloc_EXPR_LIST (int, rtx, rtx);
1681
1682 /* regclass.c */
1683
1684 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1685 Always at least 3, since the combiner could put that many together
1686 and we want this to remain correct for all the remaining passes. */
1687
1688 extern int max_parallel;
1689
1690 /* Free up register info memory. */
1691 extern void free_reg_info (void);
1692
1693 /* recog.c */
1694 extern int asm_noperands (rtx);
1695 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1696 enum machine_mode *);
1697
1698 extern enum reg_class reg_preferred_class (int);
1699 extern enum reg_class reg_alternate_class (int);
1700
1701 extern void split_all_insns (int);
1702 extern void split_all_insns_noflow (void);
1703
1704 #define MAX_SAVED_CONST_INT 64
1705 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1706
1707 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1708 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1709 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1710 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1711 extern GTY(()) rtx const_true_rtx;
1712
1713 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1714
1715 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1716 same as VOIDmode. */
1717
1718 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1719
1720 /* Likewise, for the constants 1 and 2. */
1721
1722 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1723 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1724
1725 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1726 is used to represent the frame pointer. This is because the
1727 hard frame pointer and the automatic variables are separated by an amount
1728 that cannot be determined until after register allocation. We can assume
1729 that in this case ELIMINABLE_REGS will be defined, one action of which
1730 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1731 #ifndef HARD_FRAME_POINTER_REGNUM
1732 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1733 #endif
1734
1735 /* Index labels for global_rtl. */
1736 enum global_rtl_index
1737 {
1738 GR_PC,
1739 GR_CC0,
1740 GR_STACK_POINTER,
1741 GR_FRAME_POINTER,
1742 /* For register elimination to work properly these hard_frame_pointer_rtx,
1743 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1744 the same register. */
1745 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1746 GR_ARG_POINTER = GR_FRAME_POINTER,
1747 #endif
1748 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1749 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1750 #else
1751 GR_HARD_FRAME_POINTER,
1752 #endif
1753 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1754 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1755 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1756 #else
1757 GR_ARG_POINTER,
1758 #endif
1759 #endif
1760 GR_VIRTUAL_INCOMING_ARGS,
1761 GR_VIRTUAL_STACK_ARGS,
1762 GR_VIRTUAL_STACK_DYNAMIC,
1763 GR_VIRTUAL_OUTGOING_ARGS,
1764 GR_VIRTUAL_CFA,
1765
1766 GR_MAX
1767 };
1768
1769 /* Pointers to standard pieces of rtx are stored here. */
1770 extern GTY(()) rtx global_rtl[GR_MAX];
1771
1772 /* Standard pieces of rtx, to be substituted directly into things. */
1773 #define pc_rtx (global_rtl[GR_PC])
1774 #define cc0_rtx (global_rtl[GR_CC0])
1775
1776 /* All references to certain hard regs, except those created
1777 by allocating pseudo regs into them (when that's possible),
1778 go through these unique rtx objects. */
1779 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1780 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1781 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1782 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1783
1784 extern GTY(()) rtx pic_offset_table_rtx;
1785 extern GTY(()) rtx static_chain_rtx;
1786 extern GTY(()) rtx static_chain_incoming_rtx;
1787 extern GTY(()) rtx return_address_pointer_rtx;
1788
1789 /* Include the RTL generation functions. */
1790
1791 #ifndef GENERATOR_FILE
1792 #include "genrtl.h"
1793 #ifndef USE_MAPPED_LOCATION
1794 #undef gen_rtx_ASM_OPERANDS
1795 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1796 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1797 #endif
1798 #endif
1799
1800 /* There are some RTL codes that require special attention; the
1801 generation functions included above do the raw handling. If you
1802 add to this list, modify special_rtx in gengenrtl.c as well. */
1803
1804 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1805 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1806 extern rtx gen_raw_REG (enum machine_mode, int);
1807 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1808 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1809 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1810
1811 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1812
1813 /* Virtual registers are used during RTL generation to refer to locations into
1814 the stack frame when the actual location isn't known until RTL generation
1815 is complete. The routine instantiate_virtual_regs replaces these with
1816 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1817 a constant. */
1818
1819 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1820
1821 /* This points to the first word of the incoming arguments passed on the stack,
1822 either by the caller or by the callee when pretending it was passed by the
1823 caller. */
1824
1825 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1826
1827 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1828
1829 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1830 variable on the stack. Otherwise, it points to the first variable on
1831 the stack. */
1832
1833 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1834
1835 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1836
1837 /* This points to the location of dynamically-allocated memory on the stack
1838 immediately after the stack pointer has been adjusted by the amount
1839 desired. */
1840
1841 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1842
1843 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1844
1845 /* This points to the location in the stack at which outgoing arguments should
1846 be written when the stack is pre-pushed (arguments pushed using push
1847 insns always use sp). */
1848
1849 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1850
1851 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1852
1853 /* This points to the Canonical Frame Address of the function. This
1854 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1855 but is calculated relative to the arg pointer for simplicity; the
1856 frame pointer nor stack pointer are necessarily fixed relative to
1857 the CFA until after reload. */
1858
1859 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1860
1861 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1862
1863 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1864
1865 /* Nonzero if REGNUM is a pointer into the stack frame. */
1866 #define REGNO_PTR_FRAME_P(REGNUM) \
1867 ((REGNUM) == STACK_POINTER_REGNUM \
1868 || (REGNUM) == FRAME_POINTER_REGNUM \
1869 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1870 || (REGNUM) == ARG_POINTER_REGNUM \
1871 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1872 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1873
1874 /* REGNUM never really appearing in the INSN stream. */
1875 #define INVALID_REGNUM (~(unsigned int) 0)
1876
1877 extern rtx output_constant_def (tree, int);
1878 extern rtx lookup_constant_def (tree);
1879
1880 /* Nonzero after the second flow pass has completed.
1881 Set to 1 or 0 by toplev.c */
1882 extern int flow2_completed;
1883
1884 /* Nonzero after end of reload pass.
1885 Set to 1 or 0 by reload1.c. */
1886
1887 extern int reload_completed;
1888
1889 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1890 extern int epilogue_completed;
1891
1892 /* Set to 1 while reload_as_needed is operating.
1893 Required by some machines to handle any generated moves differently. */
1894
1895 extern int reload_in_progress;
1896
1897 /* If this is nonzero, we do not bother generating VOLATILE
1898 around volatile memory references, and we are willing to
1899 output indirect addresses. If cse is to follow, we reject
1900 indirect addresses so a useful potential cse is generated;
1901 if it is used only once, instruction combination will produce
1902 the same indirect address eventually. */
1903 extern int cse_not_expected;
1904
1905 /* Set to nonzero before life analysis to indicate that it is unsafe to
1906 generate any new pseudo registers. */
1907 extern int no_new_pseudos;
1908
1909 /* Translates rtx code to tree code, for those codes needed by
1910 REAL_ARITHMETIC. The function returns an int because the caller may not
1911 know what `enum tree_code' means. */
1912
1913 extern int rtx_to_tree_code (enum rtx_code);
1914
1915 /* In cse.c */
1916 extern int delete_trivially_dead_insns (rtx, int);
1917 extern int cse_main (rtx, int, int, FILE *);
1918 extern void cse_condition_code_reg (void);
1919 extern int exp_equiv_p (rtx, rtx, int, bool);
1920 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
1921
1922 /* In jump.c */
1923 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
1924 extern int condjump_p (rtx);
1925 extern int any_condjump_p (rtx);
1926 extern int any_uncondjump_p (rtx);
1927 extern int safe_to_remove_jump_p (rtx);
1928 extern rtx pc_set (rtx);
1929 extern rtx condjump_label (rtx);
1930 extern int simplejump_p (rtx);
1931 extern int returnjump_p (rtx);
1932 extern int onlyjump_p (rtx);
1933 extern int only_sets_cc0_p (rtx);
1934 extern int sets_cc0_p (rtx);
1935 extern int invert_jump_1 (rtx, rtx);
1936 extern int invert_jump (rtx, rtx, int);
1937 extern int rtx_renumbered_equal_p (rtx, rtx);
1938 extern int true_regnum (rtx);
1939 extern unsigned int reg_or_subregno (rtx);
1940 extern int redirect_jump_1 (rtx, rtx);
1941 extern int redirect_jump (rtx, rtx, int);
1942 extern void rebuild_jump_labels (rtx);
1943 extern enum rtx_code reversed_comparison_code (rtx, rtx);
1944 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
1945 rtx, rtx, rtx);
1946 extern void delete_for_peephole (rtx, rtx);
1947 extern int condjump_in_parallel_p (rtx);
1948 extern void purge_line_number_notes (rtx);
1949
1950 /* In emit-rtl.c. */
1951 extern int max_reg_num (void);
1952 extern int max_label_num (void);
1953 extern int get_first_label_num (void);
1954 extern void maybe_set_first_label_num (rtx);
1955 extern void delete_insns_since (rtx);
1956 extern void mark_reg_pointer (rtx, int);
1957 extern void mark_user_reg (rtx);
1958 extern void reset_used_flags (rtx);
1959 extern void set_used_flags (rtx);
1960 extern void reorder_insns (rtx, rtx, rtx);
1961 extern void reorder_insns_nobb (rtx, rtx, rtx);
1962 extern int get_max_uid (void);
1963 extern int in_sequence_p (void);
1964 extern void force_next_line_note (void);
1965 extern void init_emit (void);
1966 extern void init_emit_once (int);
1967 extern void push_topmost_sequence (void);
1968 extern void pop_topmost_sequence (void);
1969 extern void reverse_comparison (rtx);
1970 extern void set_new_first_and_last_insn (rtx, rtx);
1971 extern void set_new_last_label_num (int);
1972 extern void unshare_all_rtl (void);
1973 extern void unshare_all_rtl_again (rtx);
1974 extern void unshare_all_rtl_in_chain (rtx);
1975 extern void verify_rtl_sharing (void);
1976 extern void set_first_insn (rtx);
1977 extern void set_last_insn (rtx);
1978 extern void link_cc0_insns (rtx);
1979 extern void add_insn (rtx);
1980 extern void add_insn_before (rtx, rtx);
1981 extern void add_insn_after (rtx, rtx);
1982 extern void remove_insn (rtx);
1983 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
1984 extern enum rtx_code classify_insn (rtx);
1985 extern rtx emit (rtx);
1986 extern void renumber_insns (FILE *);
1987 extern void remove_unnecessary_notes (void);
1988 extern rtx delete_insn (rtx);
1989 extern rtx entry_of_function (void);
1990 extern void delete_insn_chain (rtx, rtx);
1991 extern rtx unlink_insn_chain (rtx, rtx);
1992 extern rtx delete_insn_and_edges (rtx);
1993 extern void delete_insn_chain_and_edges (rtx, rtx);
1994 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
1995 extern rtx gen_const_mem (enum machine_mode, rtx);
1996
1997 /* In combine.c */
1998 extern int combine_instructions (rtx, unsigned int);
1999 extern unsigned int extended_count (rtx, enum machine_mode, int);
2000 extern rtx remove_death (unsigned int, rtx);
2001 extern void dump_combine_stats (FILE *);
2002 extern void dump_combine_total_stats (FILE *);
2003 /* In web.c */
2004 extern void web_main (void);
2005
2006 /* In sched-rgn.c. */
2007 extern void schedule_insns (FILE *);
2008
2009 /* In sched-ebb.c. */
2010 extern void schedule_ebbs (FILE *);
2011
2012 /* In haifa-sched.c. */
2013 extern void fix_sched_param (const char *, const char *);
2014
2015 /* In print-rtl.c */
2016 extern const char *print_rtx_head;
2017 extern void debug_rtx (rtx);
2018 extern void debug_rtx_list (rtx, int);
2019 extern void debug_rtx_range (rtx, rtx);
2020 extern rtx debug_rtx_find (rtx, int);
2021 extern void print_mem_expr (FILE *, tree);
2022 extern void print_rtl (FILE *, rtx);
2023 extern void print_simple_rtl (FILE *, rtx);
2024 extern int print_rtl_single (FILE *, rtx);
2025 extern void print_inline_rtx (FILE *, rtx, int);
2026
2027 /* In loop.c */
2028 extern void init_loop (void);
2029 extern void loop_optimize (rtx, FILE *, int);
2030 extern void branch_target_load_optimize (bool);
2031
2032 /* In function.c */
2033 extern void reposition_prologue_and_epilogue_notes (rtx);
2034 extern void thread_prologue_and_epilogue_insns (rtx);
2035 extern int prologue_epilogue_contains (rtx);
2036 extern int sibcall_epilogue_contains (rtx);
2037 extern void mark_temp_addr_taken (rtx);
2038 extern void update_temp_slot_address (rtx, rtx);
2039
2040 /* In stmt.c */
2041 extern void expand_null_return (void);
2042 extern void expand_naked_return (void);
2043 extern void emit_jump (rtx);
2044
2045 /* In expr.c */
2046 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2047 unsigned int, int);
2048
2049 /* In flow.c */
2050 extern void recompute_reg_usage (rtx, int);
2051 extern int initialize_uninitialized_subregs (void);
2052 extern void delete_dead_jumptables (void);
2053 extern void print_rtl_with_bb (FILE *, rtx);
2054 extern void dump_flow_info (FILE *);
2055
2056 /* In expmed.c */
2057 extern void init_expmed (void);
2058 extern void expand_inc (rtx, rtx);
2059 extern void expand_dec (rtx, rtx);
2060 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2061 unsigned HOST_WIDE_INT, rtx, int, int);
2062
2063 /* In gcse.c */
2064 extern bool can_copy_p (enum machine_mode);
2065 extern rtx fis_get_condition (rtx);
2066 extern int gcse_main (rtx, FILE *);
2067 extern int bypass_jumps (FILE *);
2068
2069 /* In postreload-gcse.c */
2070 extern void gcse_after_reload_main (rtx);
2071
2072 /* In global.c */
2073 extern void mark_elimination (int, int);
2074 extern int global_alloc (FILE *);
2075 extern void dump_global_regs (FILE *);
2076 #ifdef HARD_CONST
2077 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2078 extern void retry_global_alloc (int, HARD_REG_SET);
2079 #endif
2080 extern void build_insn_chain (rtx);
2081
2082 /* In regclass.c */
2083 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2084 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2085 extern void globalize_reg (int);
2086 extern void init_reg_modes_once (void);
2087 extern void init_regs (void);
2088 extern void init_fake_stack_mems (void);
2089 extern void init_reg_sets (void);
2090 extern void regset_release_memory (void);
2091 extern void regclass_init (void);
2092 extern void regclass (rtx, int, FILE *);
2093 extern void reg_scan (rtx, unsigned int, int);
2094 extern void reg_scan_update (rtx, rtx, unsigned int);
2095 extern void fix_register (const char *, int, int);
2096 #ifdef HARD_CONST
2097 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2098 enum machine_mode, unsigned int);
2099 #endif
2100 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2101 enum machine_mode);
2102
2103 /* In regmove.c */
2104 extern void regmove_optimize (rtx, int, FILE *);
2105 extern void combine_stack_adjustments (void);
2106
2107 /* In reorg.c */
2108 extern void dbr_schedule (rtx, FILE *);
2109
2110 /* In local-alloc.c */
2111 extern void dump_local_alloc (FILE *);
2112 extern int local_alloc (void);
2113
2114 /* In reg-stack.c */
2115 extern bool reg_to_stack (FILE *);
2116
2117 /* In calls.c */
2118 enum libcall_type
2119 {
2120 LCT_NORMAL = 0,
2121 LCT_CONST = 1,
2122 LCT_PURE = 2,
2123 LCT_CONST_MAKE_BLOCK = 3,
2124 LCT_PURE_MAKE_BLOCK = 4,
2125 LCT_NORETURN = 5,
2126 LCT_THROW = 6,
2127 LCT_ALWAYS_RETURN = 7,
2128 LCT_RETURNS_TWICE = 8
2129 };
2130
2131 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2132 ...);
2133 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2134 enum machine_mode, int, ...);
2135
2136 /* In unroll.c */
2137 extern int set_dominates_use (int, int, int, rtx, rtx);
2138
2139 /* In varasm.c */
2140 extern int in_data_section (void);
2141 extern void init_varasm_once (void);
2142
2143 /* In rtl.c */
2144 extern void init_rtl (void);
2145 extern void traverse_md_constants (int (*) (void **, void *), void *);
2146 struct md_constant { char *name, *value; };
2147
2148 /* In read-rtl.c */
2149 extern int read_skip_spaces (FILE *);
2150 extern rtx read_rtx (FILE *);
2151 extern const char *read_rtx_filename;
2152 extern int read_rtx_lineno;
2153
2154 /* Redefine abort to report an internal error w/o coredump, and
2155 reporting the location of the error in the source file. This logic
2156 is duplicated in rtl.h and tree.h because every file that needs the
2157 special abort includes one or both. toplev.h gets too few files,
2158 system.h gets too many. */
2159
2160 extern void fancy_abort (const char *, int, const char *)
2161 ATTRIBUTE_NORETURN;
2162 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__)
2163
2164 /* In alias.c */
2165 extern void clear_reg_alias_info (rtx);
2166 extern rtx canon_rtx (rtx);
2167 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2168 extern rtx get_addr (rtx);
2169 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2170 int (*)(rtx, int));
2171 extern int read_dependence (rtx, rtx);
2172 extern int anti_dependence (rtx, rtx);
2173 extern int output_dependence (rtx, rtx);
2174 extern void mark_constant_function (void);
2175 extern void init_alias_once (void);
2176 extern void init_alias_analysis (void);
2177 extern void end_alias_analysis (void);
2178 extern rtx addr_side_effect_eval (rtx, int, int);
2179 extern bool memory_modified_in_insn_p (rtx, rtx);
2180 extern rtx find_base_term (rtx);
2181 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2182 extern rtx get_reg_known_value (unsigned int);
2183 extern bool get_reg_known_equiv_p (unsigned int);
2184
2185 #ifdef STACK_REGS
2186 extern int stack_regs_mentioned (rtx insn);
2187 #endif
2188
2189 /* In toplev.c */
2190 extern GTY(()) rtx stack_limit_rtx;
2191
2192 /* In regrename.c */
2193 extern void regrename_optimize (void);
2194 extern void copyprop_hardreg_forward (void);
2195
2196 /* In ifcvt.c */
2197 extern void if_convert (int);
2198
2199 /* In predict.c */
2200 extern void invert_br_probabilities (rtx);
2201 extern bool expensive_function_p (int);
2202 /* In tracer.c */
2203 extern void tracer (unsigned int);
2204
2205 /* In var-tracking.c */
2206 extern void variable_tracking_main (void);
2207
2208 /* In stor-layout.c. */
2209 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2210 rtx *, rtx *);
2211
2212 /* In loop-unswitch.c */
2213 extern rtx reversed_condition (rtx);
2214 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2215
2216 /* In loop-iv.c */
2217 extern rtx canon_condition (rtx);
2218 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2219
2220 /* In ra.c. */
2221 extern void reg_alloc (void);
2222
2223 /* In modulo-sched.c. */
2224 extern void sms_schedule (FILE *);
2225 \f
2226 struct rtl_hooks
2227 {
2228 rtx (*gen_lowpart) (enum machine_mode, rtx);
2229 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2230 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2231 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2232 unsigned int, unsigned int *);
2233
2234 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2235 };
2236
2237 /* Each pass can provide its own. */
2238 extern struct rtl_hooks rtl_hooks;
2239
2240 /* ... but then it has to restore these. */
2241 extern const struct rtl_hooks general_rtl_hooks;
2242
2243 /* Keep this for the nonce. */
2244 #define gen_lowpart rtl_hooks.gen_lowpart
2245
2246 #endif /* ! GCC_RTL_H */
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