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