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Makefile.in (sched-vis.o): Update dependencies.
[gcc.git] / gcc / rtl.h
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 struct constant_descriptor_rtx *rt_constant;
175 void *rt_ptr;
176 };
177 typedef union rtunion_def rtunion;
178
179 /* RTL expression ("rtx"). */
180
181 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
182 chain_prev ("RTX_PREV (&%h)")))
183 {
184 /* The kind of expression this is. */
185 ENUM_BITFIELD(rtx_code) code: 16;
186
187 /* The kind of value the expression has. */
188 ENUM_BITFIELD(machine_mode) mode : 8;
189
190 /* 1 in a MEM if we should keep the alias set for this mem unchanged
191 when we access a component.
192 1 in a CALL_INSN if it is a sibling call.
193 1 in a SET that is for a return.
194 In a CODE_LABEL, part of the two-bit alternate entry field. */
195 unsigned int jump : 1;
196 /* In a CODE_LABEL, part of the two-bit alternate entry field.
197 1 in a MEM if it cannot trap. */
198 unsigned int call : 1;
199 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
200 1 in a SUBREG if it references an unsigned object whose mode has been
201 from a promoted to a wider mode.
202 1 in a SYMBOL_REF if it addresses something in the per-function
203 constants pool.
204 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
205 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
206 unsigned int unchanging : 1;
207 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
208 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
209 if it has been deleted.
210 1 in a REG expression if corresponds to a variable declared by the user,
211 0 for an internally generated temporary.
212 1 in a SUBREG with a negative value.
213 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
214 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
215 unsigned int volatil : 1;
216 /* 1 in a MEM referring to a field of an aggregate.
217 0 if the MEM was a variable or the result of a * operator in C;
218 1 if it was the result of a . or -> operator (on a struct) in C.
219 1 in a REG if the register is used only in exit code a loop.
220 1 in a SUBREG expression if was generated from a variable with a
221 promoted mode.
222 1 in a CODE_LABEL if the label is used for nonlocal gotos
223 and must not be deleted even if its count is zero.
224 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
225 together with the preceding insn. Valid only within sched.
226 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
227 from the target of a branch. Valid from reorg until end of compilation;
228 cleared before used. */
229 unsigned int in_struct : 1;
230 /* At the end of RTL generation, 1 if this rtx is used. This is used for
231 copying shared structure. See `unshare_all_rtl'.
232 In a REG, this is not needed for that purpose, and used instead
233 in `leaf_renumber_regs_insn'.
234 1 in a SYMBOL_REF, means that emit_library_call
235 has used it as the function. */
236 unsigned int used : 1;
237 /* 1 in an INSN or a SET if this rtx is related to the call frame,
238 either changing how we compute the frame address or saving and
239 restoring registers in the prologue and epilogue.
240 1 in a REG or MEM if it is a pointer.
241 1 in a SYMBOL_REF if it addresses something in the per-function
242 constant string pool. */
243 unsigned frame_related : 1;
244 /* 1 in a REG or PARALLEL that is the current function's return value.
245 1 in a MEM if it refers to a scalar.
246 1 in a SYMBOL_REF for a weak symbol. */
247 unsigned return_val : 1;
248
249 /* The first element of the operands of this rtx.
250 The number of operands and their types are controlled
251 by the `code' field, according to rtl.def. */
252 union u {
253 rtunion fld[1];
254 HOST_WIDE_INT hwint[1];
255 struct real_value rv;
256 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
257 };
258
259 /* The size in bytes of an rtx header (code, mode and flags). */
260 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
261
262 /* The size in bytes of an rtx with code CODE. */
263 #define RTX_SIZE(CODE) rtx_size[CODE]
264
265 #define NULL_RTX (rtx) 0
266
267 /* The "next" and "previous" RTX, relative to this one. */
268
269 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
270 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
271
272 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
273 */
274 #define RTX_PREV(X) ((INSN_P (X) \
275 || NOTE_P (X) \
276 || BARRIER_P (X) \
277 || LABEL_P (X)) \
278 && PREV_INSN (X) != NULL \
279 && NEXT_INSN (PREV_INSN (X)) == X \
280 ? PREV_INSN (X) : NULL)
281
282 /* Define macros to access the `code' field of the rtx. */
283
284 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
285 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
286
287 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
288 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
289
290 /* RTL vector. These appear inside RTX's when there is a need
291 for a variable number of things. The principle use is inside
292 PARALLEL expressions. */
293
294 struct rtvec_def GTY(()) {
295 int num_elem; /* number of elements */
296 rtx GTY ((length ("%h.num_elem"))) elem[1];
297 };
298
299 #define NULL_RTVEC (rtvec) 0
300
301 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
302 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
303
304 /* Predicate yielding nonzero iff X is an rtx for a register. */
305 #define REG_P(X) (GET_CODE (X) == REG)
306
307 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
308 #define MEM_P(X) (GET_CODE (X) == MEM)
309
310 /* Predicate yielding nonzero iff X is a label insn. */
311 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
312
313 /* Predicate yielding nonzero iff X is a jump insn. */
314 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
315
316 /* Predicate yielding nonzero iff X is a call insn. */
317 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
318
319 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
320 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
321
322 /* Predicate yielding nonzero iff X is a real insn. */
323 #define INSN_P(X) \
324 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
325
326 /* Predicate yielding nonzero iff X is a note insn. */
327 #define NOTE_P(X) (GET_CODE (X) == NOTE)
328
329 /* Predicate yielding nonzero iff X is a barrier insn. */
330 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
331
332 /* Predicate yielding nonzero iff X is a data for a jump table. */
333 #define JUMP_TABLE_DATA_P(INSN) \
334 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
335 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
336
337 /* 1 if X is a unary operator. */
338
339 #define UNARY_P(X) \
340 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
341
342 /* 1 if X is a binary operator. */
343
344 #define BINARY_P(X) \
345 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
346
347 /* 1 if X is an arithmetic operator. */
348
349 #define ARITHMETIC_P(X) \
350 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
351 == RTX_ARITHMETIC_RESULT)
352
353 /* 1 if X is an arithmetic operator. */
354
355 #define COMMUTATIVE_ARITH_P(X) \
356 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
357
358 /* 1 if X is a commutative arithmetic operator or a comparison operator.
359 These two are sometimes selected together because it is possible to
360 swap the two operands. */
361
362 #define SWAPPABLE_OPERANDS_P(X) \
363 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
364 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
365 | (1 << RTX_COMPARE)))
366
367 /* 1 if X is a non-commutative operator. */
368
369 #define NON_COMMUTATIVE_P(X) \
370 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
371 == RTX_NON_COMMUTATIVE_RESULT)
372
373 /* 1 if X is a commutative operator on integers. */
374
375 #define COMMUTATIVE_P(X) \
376 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
377 == RTX_COMMUTATIVE_RESULT)
378
379 /* 1 if X is a relational operator. */
380
381 #define COMPARISON_P(X) \
382 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
383
384 /* 1 if X is a constant value that is an integer. */
385
386 #define CONSTANT_P(X) \
387 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
388
389 /* 1 if X can be used to represent an object. */
390 #define OBJECT_P(X) \
391 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
392
393 /* General accessor macros for accessing the fields of an rtx. */
394
395 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
396 /* The bit with a star outside the statement expr and an & inside is
397 so that N can be evaluated only once. */
398 #define RTL_CHECK1(RTX, N, C1) __extension__ \
399 (*({ rtx const _rtx = (RTX); const int _n = (N); \
400 const enum rtx_code _code = GET_CODE (_rtx); \
401 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
402 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
403 __FUNCTION__); \
404 if (GET_RTX_FORMAT(_code)[_n] != C1) \
405 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
406 __FUNCTION__); \
407 &_rtx->u.fld[_n]; }))
408
409 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
410 (*({ rtx const _rtx = (RTX); const int _n = (N); \
411 const enum rtx_code _code = GET_CODE (_rtx); \
412 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
413 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
414 __FUNCTION__); \
415 if (GET_RTX_FORMAT(_code)[_n] != C1 \
416 && GET_RTX_FORMAT(_code)[_n] != C2) \
417 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
418 __FUNCTION__); \
419 &_rtx->u.fld[_n]; }))
420
421 #define RTL_CHECKC1(RTX, N, C) __extension__ \
422 (*({ rtx const _rtx = (RTX); const int _n = (N); \
423 if (GET_CODE (_rtx) != (C)) \
424 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
425 __FUNCTION__); \
426 &_rtx->u.fld[_n]; }))
427
428 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
429 (*({ rtx const _rtx = (RTX); const int _n = (N); \
430 const enum rtx_code _code = GET_CODE (_rtx); \
431 if (_code != (C1) && _code != (C2)) \
432 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
433 __FUNCTION__); \
434 &_rtx->u.fld[_n]; }))
435
436 #define RTVEC_ELT(RTVEC, I) __extension__ \
437 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
438 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
439 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
440 __FUNCTION__); \
441 &_rtvec->elem[_i]; }))
442
443 #define XWINT(RTX, N) __extension__ \
444 (*({ rtx const _rtx = (RTX); const int _n = (N); \
445 const enum rtx_code _code = GET_CODE (_rtx); \
446 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
447 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
448 __FUNCTION__); \
449 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
450 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
451 __FUNCTION__); \
452 &_rtx->u.hwint[_n]; }))
453
454 #define XCWINT(RTX, N, C) __extension__ \
455 (*({ rtx const _rtx = (RTX); \
456 if (GET_CODE (_rtx) != (C)) \
457 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
458 __FUNCTION__); \
459 &_rtx->u.hwint[N]; }))
460
461 #define XCMWINT(RTX, N, C, M) __extension__ \
462 (*({ rtx const _rtx = (RTX); \
463 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
464 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
465 __LINE__, __FUNCTION__); \
466 &_rtx->u.hwint[N]; }))
467
468 #define XCNMPRV(RTX, C, M) __extension__ \
469 ({ rtx const _rtx = (RTX); \
470 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
471 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
472 __LINE__, __FUNCTION__); \
473 &_rtx->u.rv; })
474
475 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
476 const char *)
477 ATTRIBUTE_NORETURN;
478 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
479 const char *)
480 ATTRIBUTE_NORETURN;
481 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
482 int, const char *)
483 ATTRIBUTE_NORETURN;
484 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
485 int, const char *)
486 ATTRIBUTE_NORETURN;
487 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
488 const char *, int, const char *)
489 ATTRIBUTE_NORETURN;
490 extern void rtl_check_failed_code_mode (rtx, enum rtx_code, enum machine_mode,
491 bool, const char *, int, const char *)
492 ATTRIBUTE_NORETURN;
493 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
494 const char *)
495 ATTRIBUTE_NORETURN;
496
497 #else /* not ENABLE_RTL_CHECKING */
498
499 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
500 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
501 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
502 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
503 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
504 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
505 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
506 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
507 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
508 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
509
510 #endif
511
512 /* General accessor macros for accessing the flags of an rtx. */
513
514 /* Access an individual rtx flag, with no checking of any kind. */
515 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
516
517 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
518 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
519 ({ rtx const _rtx = (RTX); \
520 if (GET_CODE(_rtx) != C1) \
521 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
522 __FUNCTION__); \
523 _rtx; })
524
525 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
526 ({ rtx const _rtx = (RTX); \
527 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
528 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
529 __FUNCTION__); \
530 _rtx; })
531
532 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
533 ({ rtx const _rtx = (RTX); \
534 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
535 && GET_CODE(_rtx) != C3) \
536 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
537 __FUNCTION__); \
538 _rtx; })
539
540 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
541 ({ rtx const _rtx = (RTX); \
542 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
543 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
544 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
545 __FUNCTION__); \
546 _rtx; })
547
548 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
549 ({ rtx const _rtx = (RTX); \
550 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
551 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
552 && GET_CODE(_rtx) != C5) \
553 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
554 __FUNCTION__); \
555 _rtx; })
556
557 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
558 __extension__ \
559 ({ rtx const _rtx = (RTX); \
560 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
561 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
562 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
563 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
564 __FUNCTION__); \
565 _rtx; })
566
567 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
568 __extension__ \
569 ({ rtx const _rtx = (RTX); \
570 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
571 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
572 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
573 && GET_CODE(_rtx) != C7) \
574 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
575 __FUNCTION__); \
576 _rtx; })
577
578 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
579 __extension__ \
580 ({ rtx const _rtx = (RTX); \
581 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
582 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
583 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
584 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
585 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
586 __FUNCTION__); \
587 _rtx; })
588
589 extern void rtl_check_failed_flag (const char *, rtx, const char *,
590 int, const char *)
591 ATTRIBUTE_NORETURN
592 ;
593
594 #else /* not ENABLE_RTL_FLAG_CHECKING */
595
596 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
597 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
598 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
599 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
600 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
601 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
602 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
603 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
604 #endif
605
606 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
607 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
608 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
609 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
610 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
611 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
612 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
613 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
614 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
615
616 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
617 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
618
619 /* These are like XINT, etc. except that they expect a '0' field instead
620 of the normal type code. */
621
622 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
623 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
624 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
625 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
626 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
627 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
628 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
629 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
630 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
631 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
632 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
633 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
634 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
635 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
636 #define X0PTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_ptr)
637
638 /* Access a '0' field with any type. */
639 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
640
641 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
642 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
643 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
644 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
645 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
646 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
647 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
648 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
649 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
650 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
651
652 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
653 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
654
655 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
656 \f
657 /* ACCESS MACROS for particular fields of insns. */
658
659 /* Holds a unique number for each insn.
660 These are not necessarily sequentially increasing. */
661 #define INSN_UID(INSN) XINT (INSN, 0)
662
663 /* Chain insns together in sequence. */
664 #define PREV_INSN(INSN) XEXP (INSN, 1)
665 #define NEXT_INSN(INSN) XEXP (INSN, 2)
666
667 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
668 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
669 /* The body of an insn. */
670 #define PATTERN(INSN) XEXP (INSN, 5)
671
672 /* Code number of instruction, from when it was recognized.
673 -1 means this instruction has not been recognized yet. */
674 #define INSN_CODE(INSN) XINT (INSN, 6)
675
676 /* Set up in flow.c; empty before then.
677 Holds a chain of INSN_LIST rtx's whose first operands point at
678 previous insns with direct data-flow connections to this one.
679 That means that those insns set variables whose next use is in this insn.
680 They are always in the same basic block as this insn. */
681 #define LOG_LINKS(INSN) XEXP(INSN, 7)
682
683 #define RTX_FRAME_RELATED_P(RTX) \
684 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
685 JUMP_INSN, BARRIER, SET)->frame_related)
686
687 /* 1 if RTX is an insn that has been deleted. */
688 #define INSN_DELETED_P(RTX) \
689 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
690 CODE_LABEL, BARRIER, NOTE)->volatil)
691
692 /* 1 if RTX is a call to a const or pure function. */
693 #define CONST_OR_PURE_CALL_P(RTX) \
694 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
695 EXPR_LIST)->unchanging)
696
697 /* 1 if RTX is a call_insn for a sibling call. */
698 #define SIBLING_CALL_P(RTX) \
699 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
700
701 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
702 #define INSN_ANNULLED_BRANCH_P(RTX) \
703 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
704
705 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
706 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
707 executed if the branch is taken. For annulled branches with this bit
708 clear, the insn should be executed only if the branch is not taken. */
709 #define INSN_FROM_TARGET_P(RTX) \
710 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
711
712 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
713 See the comments for ADDR_DIFF_VEC in rtl.def. */
714 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
715
716 /* In a VALUE, the value cselib has assigned to RTX.
717 This is a "struct cselib_val_struct", see cselib.h. */
718 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
719
720 /* Holds a list of notes on what this insn does to various REGs.
721 It is a chain of EXPR_LIST rtx's, where the second operand is the
722 chain pointer and the first operand is the REG being described.
723 The mode field of the EXPR_LIST contains not a real machine mode
724 but a value from enum reg_note. */
725 #define REG_NOTES(INSN) XEXP(INSN, 8)
726
727 enum reg_note
728 {
729 #define DEF_REG_NOTE(NAME) NAME,
730 #include "reg-notes.def"
731 #undef DEF_REG_NOTE
732 REG_NOTE_MAX
733 };
734
735 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
736 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
737 #define PUT_REG_NOTE_KIND(LINK, KIND) \
738 PUT_MODE (LINK, (enum machine_mode) (KIND))
739
740 /* Names for REG_NOTE's in EXPR_LIST insn's. */
741
742 extern const char * const reg_note_name[];
743 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
744
745 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
746 USE and CLOBBER expressions.
747 USE expressions list the registers filled with arguments that
748 are passed to the function.
749 CLOBBER expressions document the registers explicitly clobbered
750 by this CALL_INSN.
751 Pseudo registers can not be mentioned in this list. */
752 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
753
754 /* The label-number of a code-label. The assembler label
755 is made from `L' and the label-number printed in decimal.
756 Label numbers are unique in a compilation. */
757 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
758
759 /* In a NOTE that is a line number, this is a string for the file name that the
760 line is in. We use the same field to record block numbers temporarily in
761 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
762 between ints and pointers if we use a different macro for the block number.)
763 */
764
765 /* Opaque data. */
766 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
767 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
768 #ifdef USE_MAPPED_LOCATION
769 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
770 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
771 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
772 #define SET_INSN_DELETED(INSN) \
773 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
774 #else
775 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
776 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
777 (XLOC).line = NOTE_LINE_NUMBER (INSN))
778 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
779 #define SET_INSN_DELETED(INSN) \
780 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
781 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
782 #endif
783 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
784 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
785 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
786 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
787 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
788
789 /* In a NOTE that is a line number, this is the line number.
790 Other kinds of NOTEs are identified by negative numbers here. */
791 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
792
793 /* Nonzero if INSN is a note marking the beginning of a basic block. */
794 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
795 (GET_CODE (INSN) == NOTE \
796 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
797
798 /* Variable declaration and the location of a variable. */
799 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
800 0, VAR_LOCATION))
801 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
802 1, VAR_LOCATION))
803
804 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
805 that are not line numbers. These codes are all negative.
806
807 Notice that we do not try to use zero here for any of
808 the special note codes because sometimes the source line
809 actually can be zero! This happens (for example) when we
810 are generating code for the per-translation-unit constructor
811 and destructor routines for some C++ translation unit. */
812
813 enum insn_note
814 {
815 /* Keep all of these numbers negative. Adjust as needed. */
816 NOTE_INSN_BIAS = -100,
817
818 #define DEF_INSN_NOTE(NAME) NAME,
819 #include "insn-notes.def"
820 #undef DEF_INSN_NOTE
821
822 NOTE_INSN_MAX
823 };
824
825 /* Names for NOTE insn's other than line numbers. */
826
827 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
828 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
829 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
830
831 /* The name of a label, in case it corresponds to an explicit label
832 in the input source code. */
833 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
834
835 /* In jump.c, each label contains a count of the number
836 of LABEL_REFs that point at it, so unused labels can be deleted. */
837 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
838
839 /* Labels carry a two-bit field composed of the ->jump and ->call
840 bits. This field indicates whether the label is an alternate
841 entry point, and if so, what kind. */
842 enum label_kind
843 {
844 LABEL_NORMAL = 0, /* ordinary label */
845 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
846 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
847 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
848 };
849
850 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
851
852 /* Retrieve the kind of LABEL. */
853 #define LABEL_KIND(LABEL) __extension__ \
854 ({ rtx const _label = (LABEL); \
855 if (GET_CODE (_label) != CODE_LABEL) \
856 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
857 __FUNCTION__); \
858 (enum label_kind) ((_label->jump << 1) | _label->call); })
859
860 /* Set the kind of LABEL. */
861 #define SET_LABEL_KIND(LABEL, KIND) do { \
862 rtx _label = (LABEL); \
863 unsigned int _kind = (KIND); \
864 if (GET_CODE (_label) != CODE_LABEL) \
865 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
866 __FUNCTION__); \
867 _label->jump = ((_kind >> 1) & 1); \
868 _label->call = (_kind & 1); \
869 } while (0)
870
871 #else
872
873 /* Retrieve the kind of LABEL. */
874 #define LABEL_KIND(LABEL) \
875 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
876
877 /* Set the kind of LABEL. */
878 #define SET_LABEL_KIND(LABEL, KIND) do { \
879 rtx _label = (LABEL); \
880 unsigned int _kind = (KIND); \
881 _label->jump = ((_kind >> 1) & 1); \
882 _label->call = (_kind & 1); \
883 } while (0)
884
885 #endif /* rtl flag checking */
886
887 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
888
889 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
890 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
891 be decremented and possibly the label can be deleted. */
892 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
893
894 /* Once basic blocks are found in flow.c,
895 each CODE_LABEL starts a chain that goes through
896 all the LABEL_REFs that jump to that label.
897 The chain eventually winds up at the CODE_LABEL: it is circular. */
898 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
899 \f
900 /* This is the field in the LABEL_REF through which the circular chain
901 of references to a particular label is linked.
902 FIXME: This chain is used in loop.c and in the SH backend.
903 Since loop.c is about to go away, it could be a win to replace
904 the uses of this in the SH backend with something else. */
905 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
906
907 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
908 the number the register originally had; for a pseudo register turned into
909 a hard reg this will hold the old pseudo register number. */
910
911 #define REGNO(RTX) XCUINT (RTX, 0, REG)
912 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
913
914 /* 1 if RTX is a reg or parallel that is the current function's return
915 value. */
916 #define REG_FUNCTION_VALUE_P(RTX) \
917 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
918
919 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
920 #define REG_USERVAR_P(RTX) \
921 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
922
923 /* 1 if RTX is a reg that holds a pointer value. */
924 #define REG_POINTER(RTX) \
925 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
926
927 /* 1 if RTX is a mem that holds a pointer value. */
928 #define MEM_POINTER(RTX) \
929 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
930
931 /* 1 if the given register REG corresponds to a hard register. */
932 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
933
934 /* 1 if the given register number REG_NO corresponds to a hard register. */
935 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
936
937 /* For a CONST_INT rtx, INTVAL extracts the integer. */
938 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
939
940 /* For a CONST_DOUBLE:
941 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
942 low-order word and ..._HIGH the high-order.
943 For a float, there is a REAL_VALUE_TYPE structure, and
944 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
945 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
946 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
947 #define CONST_DOUBLE_REAL_VALUE(r) \
948 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
949
950 /* For a CONST_VECTOR, return element #n. */
951 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
952
953 /* For a CONST_VECTOR, return the number of elements in a vector. */
954 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
955
956 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
957 SUBREG_BYTE extracts the byte-number. */
958
959 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
960 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
961
962 /* in rtlanal.c */
963 /* Return the right cost to give to an operation
964 to make the cost of the corresponding register-to-register instruction
965 N times that of a fast register-to-register instruction. */
966 #define COSTS_N_INSNS(N) ((N) * 4)
967
968 /* Maximum cost of an rtl expression. This value has the special meaning
969 not to use an rtx with this cost under any circumstances. */
970 #define MAX_COST INT_MAX
971
972 extern void init_rtlanal (void);
973 extern int rtx_cost (rtx, enum rtx_code);
974 extern int address_cost (rtx, enum machine_mode);
975 extern unsigned int subreg_lsb (rtx);
976 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
977 unsigned int);
978 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
979 unsigned int, enum machine_mode);
980 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
981 unsigned int, enum machine_mode);
982 extern unsigned int subreg_regno (rtx);
983 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
984 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
985
986
987 /* 1 if RTX is a subreg containing a reg that is already known to be
988 sign- or zero-extended from the mode of the subreg to the mode of
989 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
990 extension.
991
992 When used as a LHS, is means that this extension must be done
993 when assigning to SUBREG_REG. */
994
995 #define SUBREG_PROMOTED_VAR_P(RTX) \
996 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
997
998 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
999 do { \
1000 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1001 if ((VAL) < 0) \
1002 _rtx->volatil = 1; \
1003 else { \
1004 _rtx->volatil = 0; \
1005 _rtx->unchanging = (VAL); \
1006 } \
1007 } while (0)
1008 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1009 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1010 ? -1 : (RTX)->unchanging)
1011
1012 /* Access various components of an ASM_OPERANDS rtx. */
1013
1014 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1015 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1016 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1017 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1018 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1019 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1020 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1021 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1022 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1023 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1024 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1025 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1026 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1027 #ifdef USE_MAPPED_LOCATION
1028 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1029 #else
1030 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1031 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1032 #endif
1033
1034 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1035 #define MEM_READONLY_P(RTX) \
1036 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1037
1038 /* 1 if RTX is a mem and we should keep the alias set for this mem
1039 unchanged when we access a component. Set to 1, or example, when we
1040 are already in a non-addressable component of an aggregate. */
1041 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1042 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1043
1044 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1045 #define MEM_VOLATILE_P(RTX) \
1046 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1047 ASM_INPUT)->volatil)
1048
1049 /* 1 if RTX is a mem that refers to an aggregate, either to the
1050 aggregate itself or to a field of the aggregate. If zero, RTX may
1051 or may not be such a reference. */
1052 #define MEM_IN_STRUCT_P(RTX) \
1053 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1054
1055 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1056 not refer to a scalar. */
1057 #define MEM_SCALAR_P(RTX) \
1058 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1059
1060 /* 1 if RTX is a mem that cannot trap. */
1061 #define MEM_NOTRAP_P(RTX) \
1062 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1063
1064 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1065 RTX. Otherwise, vice versa. Use this macro only when you are
1066 *sure* that you know that the MEM is in a structure, or is a
1067 scalar. VAL is evaluated only once. */
1068 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1069 do { \
1070 if (VAL) \
1071 { \
1072 MEM_IN_STRUCT_P (RTX) = 1; \
1073 MEM_SCALAR_P (RTX) = 0; \
1074 } \
1075 else \
1076 { \
1077 MEM_IN_STRUCT_P (RTX) = 0; \
1078 MEM_SCALAR_P (RTX) = 1; \
1079 } \
1080 } while (0)
1081
1082 /* The memory attribute block. We provide access macros for each value
1083 in the block and provide defaults if none specified. */
1084 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1085
1086 /* The register attribute block. We provide access macros for each value
1087 in the block and provide defaults if none specified. */
1088 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1089
1090 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1091 set, and may alias anything. Otherwise, the MEM can only alias
1092 MEMs in a conflicting alias set. This value is set in a
1093 language-dependent manner in the front-end, and should not be
1094 altered in the back-end. These set numbers are tested with
1095 alias_sets_conflict_p. */
1096 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1097
1098 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1099 refer to part of a DECL. It may also be a COMPONENT_REF. */
1100 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1101
1102 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1103 RTX that is always a CONST_INT. */
1104 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1105
1106 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1107 is always a CONST_INT. */
1108 #define MEM_SIZE(RTX) \
1109 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1110 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1111 : 0)
1112
1113 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1114 mode as a default when STRICT_ALIGNMENT, but not if not. */
1115 #define MEM_ALIGN(RTX) \
1116 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1117 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1118 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1119
1120 /* For a REG rtx, the decl it is known to refer to, if it is known to
1121 refer to part of a DECL. */
1122 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1123
1124 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1125 RTX that is always a CONST_INT. */
1126 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1127
1128 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1129 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1130 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1131 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1132 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1133 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1134 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1135 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1136 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1137
1138 /* 1 if RTX is a label_ref to a label outside the loop containing the
1139 reference. */
1140 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1141 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1142
1143 /* 1 if RTX is a label_ref for a nonlocal label. */
1144 /* Likewise in an expr_list for a reg_label note. */
1145 #define LABEL_REF_NONLOCAL_P(RTX) \
1146 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1147 REG_LABEL)->volatil)
1148
1149 /* 1 if RTX is a code_label that should always be considered to be needed. */
1150 #define LABEL_PRESERVE_P(RTX) \
1151 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1152
1153 /* During sched, 1 if RTX is an insn that must be scheduled together
1154 with the preceding insn. */
1155 #define SCHED_GROUP_P(RTX) \
1156 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1157 )->in_struct)
1158
1159 /* For a SET rtx, SET_DEST is the place that is set
1160 and SET_SRC is the value it is set to. */
1161 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1162 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1163 #define SET_IS_RETURN_P(RTX) \
1164 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1165
1166 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1167 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1168 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1169
1170 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1171 conditionally executing the code on, COND_EXEC_CODE is the code
1172 to execute if the condition is true. */
1173 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1174 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1175
1176 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1177 constants pool. */
1178 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1179 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1180
1181 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1182 tree constant pool. This information is private to varasm.c. */
1183 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1184 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1185 (RTX), SYMBOL_REF)->frame_related)
1186
1187 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1188 #define SYMBOL_REF_FLAG(RTX) \
1189 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1190
1191 /* 1 if RTX is a symbol_ref that has been the library function in
1192 emit_library_call. */
1193 #define SYMBOL_REF_USED(RTX) \
1194 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1195
1196 /* 1 if RTX is a symbol_ref for a weak symbol. */
1197 #define SYMBOL_REF_WEAK(RTX) \
1198 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1199
1200 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1201 SYMBOL_REF_CONSTANT. */
1202 #define SYMBOL_REF_DATA(RTX) X0PTR ((RTX), 2)
1203
1204 /* The tree (decl or constant) associated with the symbol, or null. */
1205 #define SYMBOL_REF_DECL(RTX) \
1206 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1207
1208 /* The rtx constant pool entry for a symbol, or null. */
1209 #define SYMBOL_REF_CONSTANT(RTX) \
1210 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1211
1212 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1213 information derivable from the tree decl associated with this symbol.
1214 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1215 decl. In some cases this is a bug. But beyond that, it's nice to cache
1216 this information to avoid recomputing it. Finally, this allows space for
1217 the target to store more than one bit of information, as with
1218 SYMBOL_REF_FLAG. */
1219 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1220
1221 /* These flags are common enough to be defined for all targets. They
1222 are computed by the default version of targetm.encode_section_info. */
1223
1224 /* Set if this symbol is a function. */
1225 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1226 #define SYMBOL_REF_FUNCTION_P(RTX) \
1227 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1228 /* Set if targetm.binds_local_p is true. */
1229 #define SYMBOL_FLAG_LOCAL (1 << 1)
1230 #define SYMBOL_REF_LOCAL_P(RTX) \
1231 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1232 /* Set if targetm.in_small_data_p is true. */
1233 #define SYMBOL_FLAG_SMALL (1 << 2)
1234 #define SYMBOL_REF_SMALL_P(RTX) \
1235 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1236 /* The three-bit field at [5:3] is true for TLS variables; use
1237 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1238 #define SYMBOL_FLAG_TLS_SHIFT 3
1239 #define SYMBOL_REF_TLS_MODEL(RTX) \
1240 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1241 /* Set if this symbol is not defined in this translation unit. */
1242 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1243 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1244 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1245
1246 /* Subsequent bits are available for the target to use. */
1247 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1248 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1249
1250 /* Define a macro to look for REG_INC notes,
1251 but save time on machines where they never exist. */
1252
1253 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1254 #define FIND_REG_INC_NOTE(INSN, REG) \
1255 ((REG) != NULL_RTX && REG_P ((REG)) \
1256 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1257 : find_reg_note ((INSN), REG_INC, (REG)))
1258 #else
1259 #define FIND_REG_INC_NOTE(INSN, REG) 0
1260 #endif
1261
1262 /* Indicate whether the machine has any sort of auto increment addressing.
1263 If not, we can avoid checking for REG_INC notes. */
1264
1265 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1266 #define AUTO_INC_DEC
1267 #endif
1268
1269 #ifndef HAVE_PRE_INCREMENT
1270 #define HAVE_PRE_INCREMENT 0
1271 #endif
1272
1273 #ifndef HAVE_PRE_DECREMENT
1274 #define HAVE_PRE_DECREMENT 0
1275 #endif
1276
1277 #ifndef HAVE_POST_INCREMENT
1278 #define HAVE_POST_INCREMENT 0
1279 #endif
1280
1281 #ifndef HAVE_POST_DECREMENT
1282 #define HAVE_POST_DECREMENT 0
1283 #endif
1284
1285 #ifndef HAVE_POST_MODIFY_DISP
1286 #define HAVE_POST_MODIFY_DISP 0
1287 #endif
1288
1289 #ifndef HAVE_POST_MODIFY_REG
1290 #define HAVE_POST_MODIFY_REG 0
1291 #endif
1292
1293 #ifndef HAVE_PRE_MODIFY_DISP
1294 #define HAVE_PRE_MODIFY_DISP 0
1295 #endif
1296
1297 #ifndef HAVE_PRE_MODIFY_REG
1298 #define HAVE_PRE_MODIFY_REG 0
1299 #endif
1300
1301
1302 /* Some architectures do not have complete pre/post increment/decrement
1303 instruction sets, or only move some modes efficiently. These macros
1304 allow us to tune autoincrement generation. */
1305
1306 #ifndef USE_LOAD_POST_INCREMENT
1307 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1308 #endif
1309
1310 #ifndef USE_LOAD_POST_DECREMENT
1311 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1312 #endif
1313
1314 #ifndef USE_LOAD_PRE_INCREMENT
1315 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1316 #endif
1317
1318 #ifndef USE_LOAD_PRE_DECREMENT
1319 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1320 #endif
1321
1322 #ifndef USE_STORE_POST_INCREMENT
1323 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1324 #endif
1325
1326 #ifndef USE_STORE_POST_DECREMENT
1327 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1328 #endif
1329
1330 #ifndef USE_STORE_PRE_INCREMENT
1331 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1332 #endif
1333
1334 #ifndef USE_STORE_PRE_DECREMENT
1335 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1336 #endif
1337 \f
1338 /* Nonzero when we are generating CONCATs. */
1339 extern int generating_concat_p;
1340
1341 /* Nonzero when we are expanding trees to RTL. */
1342 extern int currently_expanding_to_rtl;
1343
1344 /* Generally useful functions. */
1345
1346 /* In expmed.c */
1347 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1348
1349 /* In builtins.c */
1350 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1351
1352 /* In explow.c */
1353 extern void set_stack_check_libfunc (rtx);
1354 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1355 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1356
1357 /* In emit-rtl.c */
1358 extern rtvec gen_rtvec (int, ...);
1359 extern rtx copy_insn_1 (rtx);
1360 extern rtx copy_insn (rtx);
1361 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1362 extern rtx emit_copy_of_insn_after (rtx, rtx);
1363 extern void set_reg_attrs_from_mem (rtx, rtx);
1364 extern void set_mem_attrs_from_reg (rtx, rtx);
1365 extern void set_reg_attrs_for_parm (rtx, rtx);
1366 extern int mem_expr_equal_p (tree, tree);
1367
1368 /* In rtl.c */
1369 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1370 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1371
1372 extern rtvec rtvec_alloc (int);
1373 extern rtx copy_rtx (rtx);
1374 extern void dump_rtx_statistics (void);
1375
1376 /* In emit-rtl.c */
1377 extern rtx copy_rtx_if_shared (rtx);
1378
1379 /* In rtl.c */
1380 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1381 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1382 extern int rtx_equal_p (rtx, rtx);
1383
1384 /* In emit-rtl.c */
1385 extern rtvec gen_rtvec_v (int, rtx *);
1386 extern rtx gen_reg_rtx (enum machine_mode);
1387 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1388 extern rtx gen_label_rtx (void);
1389 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1390
1391 /* In cse.c */
1392 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1393
1394 /* In emit-rtl.c */
1395 extern rtx gen_highpart (enum machine_mode, rtx);
1396 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1397 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1398
1399 /* In emit-rtl.c */
1400 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1401 extern int subreg_lowpart_p (rtx);
1402 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1403 enum machine_mode);
1404 extern unsigned int subreg_highpart_offset (enum machine_mode,
1405 enum machine_mode);
1406 extern rtx make_safe_from (rtx, rtx);
1407 extern rtx convert_memory_address (enum machine_mode, rtx);
1408 extern rtx get_insns (void);
1409 extern const char *get_insn_name (int);
1410 extern rtx get_last_insn (void);
1411 extern rtx get_last_insn_anywhere (void);
1412 extern rtx get_first_nonnote_insn (void);
1413 extern rtx get_last_nonnote_insn (void);
1414 extern void start_sequence (void);
1415 extern void push_to_sequence (rtx);
1416 extern void end_sequence (void);
1417 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1418 enum machine_mode);
1419
1420 /* In loop-iv.c */
1421
1422 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1423
1424 /* In varasm.c */
1425 extern rtx force_const_mem (enum machine_mode, rtx);
1426
1427 /* In varasm.c */
1428
1429 struct function;
1430 extern rtx get_pool_constant (rtx);
1431 extern rtx get_pool_constant_mark (rtx, bool *);
1432 extern enum machine_mode get_pool_mode (rtx);
1433 extern rtx simplify_subtraction (rtx);
1434
1435 /* In function.c */
1436 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1437 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1438 extern rtx assign_stack_temp_for_type (enum machine_mode,
1439 HOST_WIDE_INT, int, tree);
1440 extern rtx assign_temp (tree, int, int, int);
1441
1442 /* In emit-rtl.c */
1443 extern rtx emit_insn_before (rtx, rtx);
1444 extern rtx emit_insn_before_noloc (rtx, rtx);
1445 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1446 extern rtx emit_jump_insn_before (rtx, rtx);
1447 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1448 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1449 extern rtx emit_call_insn_before (rtx, rtx);
1450 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1451 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1452 extern rtx emit_barrier_before (rtx);
1453 extern rtx emit_label_before (rtx, rtx);
1454 extern rtx emit_note_before (int, rtx);
1455 extern rtx emit_insn_after (rtx, rtx);
1456 extern rtx emit_insn_after_noloc (rtx, rtx);
1457 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1458 extern rtx emit_jump_insn_after (rtx, rtx);
1459 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1460 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1461 extern rtx emit_call_insn_after (rtx, rtx);
1462 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1463 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1464 extern rtx emit_barrier_after (rtx);
1465 extern rtx emit_label_after (rtx, rtx);
1466 extern rtx emit_note_after (int, rtx);
1467 extern rtx emit_note_copy_after (rtx, rtx);
1468 extern rtx emit_insn (rtx);
1469 extern rtx emit_jump_insn (rtx);
1470 extern rtx emit_call_insn (rtx);
1471 extern rtx emit_label (rtx);
1472 extern rtx emit_barrier (void);
1473 extern rtx emit_note (int);
1474 extern rtx emit_note_copy (rtx);
1475 extern rtx emit_line_note (location_t);
1476 extern rtx make_insn_raw (rtx);
1477 extern rtx make_jump_insn_raw (rtx);
1478 extern void add_function_usage_to (rtx, rtx);
1479 extern rtx last_call_insn (void);
1480 extern rtx previous_insn (rtx);
1481 extern rtx next_insn (rtx);
1482 extern rtx prev_nonnote_insn (rtx);
1483 extern rtx next_nonnote_insn (rtx);
1484 extern rtx prev_real_insn (rtx);
1485 extern rtx next_real_insn (rtx);
1486 extern rtx prev_active_insn (rtx);
1487 extern rtx next_active_insn (rtx);
1488 extern int active_insn_p (rtx);
1489 extern rtx prev_label (rtx);
1490 extern rtx next_label (rtx);
1491 extern rtx skip_consecutive_labels (rtx);
1492 extern rtx next_cc0_user (rtx);
1493 extern rtx prev_cc0_setter (rtx);
1494
1495 /* In cfglayout.c */
1496 extern int insn_line (rtx);
1497 extern const char * insn_file (rtx);
1498 extern int locator_line (int);
1499 extern const char * locator_file (int);
1500 extern int prologue_locator, epilogue_locator;
1501
1502 /* In jump.c */
1503 extern enum rtx_code reverse_condition (enum rtx_code);
1504 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1505 extern enum rtx_code swap_condition (enum rtx_code);
1506 extern enum rtx_code unsigned_condition (enum rtx_code);
1507 extern enum rtx_code signed_condition (enum rtx_code);
1508 extern void mark_jump_label (rtx, rtx, int);
1509 extern void cleanup_barriers (void);
1510
1511 /* In jump.c */
1512 extern bool squeeze_notes (rtx *, rtx *);
1513 extern rtx delete_related_insns (rtx);
1514 extern void delete_jump (rtx);
1515 extern rtx get_label_before (rtx);
1516 extern rtx get_label_after (rtx);
1517 extern rtx follow_jumps (rtx);
1518
1519 /* In recog.c */
1520 extern rtx *find_constant_term_loc (rtx *);
1521
1522 /* In emit-rtl.c */
1523 extern rtx try_split (rtx, rtx, int);
1524 extern int split_branch_probability;
1525
1526 /* In unknown file */
1527 extern rtx split_insns (rtx, rtx);
1528
1529 /* In simplify-rtx.c */
1530 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1531 rtx, enum machine_mode);
1532 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1533 enum machine_mode);
1534 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1535 rtx, rtx);
1536 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1537 rtx);
1538 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1539 enum machine_mode, rtx, rtx, rtx);
1540 extern rtx simplify_const_relational_operation (enum rtx_code,
1541 enum machine_mode, rtx, rtx);
1542 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1543 enum machine_mode, rtx, rtx);
1544 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1545 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1546 enum machine_mode);
1547 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1548 enum machine_mode, rtx, rtx, rtx);
1549 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1550 enum machine_mode, rtx, rtx);
1551 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1552 unsigned int);
1553 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1554 unsigned int);
1555 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1556 extern rtx simplify_rtx (rtx);
1557 extern rtx avoid_constant_pool_reference (rtx);
1558 extern bool constant_pool_reference_p (rtx x);
1559 extern bool mode_signbit_p (enum machine_mode, rtx);
1560
1561 /* In regclass.c */
1562 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1563 bool);
1564
1565 /* In emit-rtl.c */
1566 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1567
1568 /* Functions in rtlanal.c */
1569
1570 /* Single set is implemented as macro for performance reasons. */
1571 #define single_set(I) (INSN_P (I) \
1572 ? (GET_CODE (PATTERN (I)) == SET \
1573 ? PATTERN (I) : single_set_1 (I)) \
1574 : NULL_RTX)
1575 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1576
1577 /* Structure used for passing data to REPLACE_LABEL. */
1578 typedef struct replace_label_data
1579 {
1580 rtx r1;
1581 rtx r2;
1582 bool update_label_nuses;
1583 } replace_label_data;
1584
1585 extern int rtx_addr_can_trap_p (rtx);
1586 extern bool nonzero_address_p (rtx);
1587 extern int rtx_unstable_p (rtx);
1588 extern int rtx_varies_p (rtx, int);
1589 extern int rtx_addr_varies_p (rtx, int);
1590 extern HOST_WIDE_INT get_integer_term (rtx);
1591 extern rtx get_related_value (rtx);
1592 extern int reg_mentioned_p (rtx, rtx);
1593 extern int count_occurrences (rtx, rtx, int);
1594 extern int reg_referenced_p (rtx, rtx);
1595 extern int reg_used_between_p (rtx, rtx, rtx);
1596 extern int reg_set_between_p (rtx, rtx, rtx);
1597 extern int commutative_operand_precedence (rtx);
1598 extern int swap_commutative_operands_p (rtx, rtx);
1599 extern int modified_between_p (rtx, rtx, rtx);
1600 extern int no_labels_between_p (rtx, rtx);
1601 extern int modified_in_p (rtx, rtx);
1602 extern int reg_set_p (rtx, rtx);
1603 extern rtx single_set_2 (rtx, rtx);
1604 extern int multiple_sets (rtx);
1605 extern int set_noop_p (rtx);
1606 extern int noop_move_p (rtx);
1607 extern rtx find_last_value (rtx, rtx *, rtx, int);
1608 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1609 extern int reg_overlap_mentioned_p (rtx, rtx);
1610 extern rtx set_of (rtx, rtx);
1611 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1612 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1613 extern int dead_or_set_p (rtx, rtx);
1614 extern int dead_or_set_regno_p (rtx, unsigned int);
1615 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1616 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1617 extern rtx find_reg_equal_equiv_note (rtx);
1618 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1619 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1620 extern int pure_call_p (rtx);
1621 extern void remove_note (rtx, rtx);
1622 extern int side_effects_p (rtx);
1623 extern int volatile_refs_p (rtx);
1624 extern int volatile_insn_p (rtx);
1625 extern int may_trap_p (rtx);
1626 extern int may_trap_or_fault_p (rtx);
1627 extern int inequality_comparisons_p (rtx);
1628 extern rtx replace_rtx (rtx, rtx, rtx);
1629 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1630 extern int replace_label (rtx *, void *);
1631 extern int rtx_referenced_p (rtx, rtx);
1632 extern bool tablejump_p (rtx, rtx *, rtx *);
1633 extern int computed_jump_p (rtx);
1634 typedef int (*rtx_function) (rtx *, void *);
1635 extern int for_each_rtx (rtx *, rtx_function, void *);
1636 extern rtx regno_use_in (unsigned int, rtx);
1637 extern int auto_inc_p (rtx);
1638 extern int in_expr_list_p (rtx, rtx);
1639 extern void remove_node_from_expr_list (rtx, rtx *);
1640 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1641 extern int loc_mentioned_in_p (rtx *, rtx);
1642 extern rtx find_first_parameter_load (rtx, rtx);
1643 extern bool keep_with_call_p (rtx);
1644 extern bool label_is_jump_target_p (rtx, rtx);
1645 extern int insn_rtx_cost (rtx);
1646
1647 /* Given an insn and condition, return a canonical description of
1648 the test being made. */
1649 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1650
1651 /* Given a JUMP_INSN, return a canonical description of the test
1652 being made. */
1653 extern rtx get_condition (rtx, rtx *, int, int);
1654
1655
1656 /* flow.c */
1657
1658 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1659
1660 /* lists.c */
1661
1662 void free_EXPR_LIST_list (rtx *);
1663 void free_INSN_LIST_list (rtx *);
1664 void free_EXPR_LIST_node (rtx);
1665 void free_INSN_LIST_node (rtx);
1666 rtx alloc_INSN_LIST (rtx, rtx);
1667 rtx alloc_EXPR_LIST (int, rtx, rtx);
1668
1669 /* regclass.c */
1670
1671 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1672 Always at least 3, since the combiner could put that many together
1673 and we want this to remain correct for all the remaining passes. */
1674
1675 extern int max_parallel;
1676
1677 /* Free up register info memory. */
1678 extern void free_reg_info (void);
1679
1680 /* recog.c */
1681 extern int asm_noperands (rtx);
1682 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1683 enum machine_mode *);
1684
1685 extern enum reg_class reg_preferred_class (int);
1686 extern enum reg_class reg_alternate_class (int);
1687
1688 extern void split_all_insns (int);
1689 extern void split_all_insns_noflow (void);
1690
1691 #define MAX_SAVED_CONST_INT 64
1692 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1693
1694 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1695 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1696 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1697 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1698 extern GTY(()) rtx const_true_rtx;
1699
1700 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1701
1702 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1703 same as VOIDmode. */
1704
1705 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1706
1707 /* Likewise, for the constants 1 and 2. */
1708
1709 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1710 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1711
1712 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1713 is used to represent the frame pointer. This is because the
1714 hard frame pointer and the automatic variables are separated by an amount
1715 that cannot be determined until after register allocation. We can assume
1716 that in this case ELIMINABLE_REGS will be defined, one action of which
1717 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1718 #ifndef HARD_FRAME_POINTER_REGNUM
1719 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1720 #endif
1721
1722 /* Index labels for global_rtl. */
1723 enum global_rtl_index
1724 {
1725 GR_PC,
1726 GR_CC0,
1727 GR_STACK_POINTER,
1728 GR_FRAME_POINTER,
1729 /* For register elimination to work properly these hard_frame_pointer_rtx,
1730 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1731 the same register. */
1732 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1733 GR_ARG_POINTER = GR_FRAME_POINTER,
1734 #endif
1735 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1736 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1737 #else
1738 GR_HARD_FRAME_POINTER,
1739 #endif
1740 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1741 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1742 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1743 #else
1744 GR_ARG_POINTER,
1745 #endif
1746 #endif
1747 GR_VIRTUAL_INCOMING_ARGS,
1748 GR_VIRTUAL_STACK_ARGS,
1749 GR_VIRTUAL_STACK_DYNAMIC,
1750 GR_VIRTUAL_OUTGOING_ARGS,
1751 GR_VIRTUAL_CFA,
1752
1753 GR_MAX
1754 };
1755
1756 /* Pointers to standard pieces of rtx are stored here. */
1757 extern GTY(()) rtx global_rtl[GR_MAX];
1758
1759 /* Standard pieces of rtx, to be substituted directly into things. */
1760 #define pc_rtx (global_rtl[GR_PC])
1761 #define cc0_rtx (global_rtl[GR_CC0])
1762
1763 /* All references to certain hard regs, except those created
1764 by allocating pseudo regs into them (when that's possible),
1765 go through these unique rtx objects. */
1766 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1767 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1768 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1769 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1770
1771 extern GTY(()) rtx pic_offset_table_rtx;
1772 extern GTY(()) rtx static_chain_rtx;
1773 extern GTY(()) rtx static_chain_incoming_rtx;
1774 extern GTY(()) rtx return_address_pointer_rtx;
1775
1776 /* Include the RTL generation functions. */
1777
1778 #ifndef GENERATOR_FILE
1779 #include "genrtl.h"
1780 #ifndef USE_MAPPED_LOCATION
1781 #undef gen_rtx_ASM_OPERANDS
1782 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1783 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1784 #endif
1785 #endif
1786
1787 /* There are some RTL codes that require special attention; the
1788 generation functions included above do the raw handling. If you
1789 add to this list, modify special_rtx in gengenrtl.c as well. */
1790
1791 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1792 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1793 extern rtx gen_raw_REG (enum machine_mode, int);
1794 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1795 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1796 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1797
1798 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1799
1800 /* Virtual registers are used during RTL generation to refer to locations into
1801 the stack frame when the actual location isn't known until RTL generation
1802 is complete. The routine instantiate_virtual_regs replaces these with
1803 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1804 a constant. */
1805
1806 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1807
1808 /* This points to the first word of the incoming arguments passed on the stack,
1809 either by the caller or by the callee when pretending it was passed by the
1810 caller. */
1811
1812 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1813
1814 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1815
1816 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1817 variable on the stack. Otherwise, it points to the first variable on
1818 the stack. */
1819
1820 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1821
1822 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1823
1824 /* This points to the location of dynamically-allocated memory on the stack
1825 immediately after the stack pointer has been adjusted by the amount
1826 desired. */
1827
1828 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1829
1830 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1831
1832 /* This points to the location in the stack at which outgoing arguments should
1833 be written when the stack is pre-pushed (arguments pushed using push
1834 insns always use sp). */
1835
1836 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1837
1838 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1839
1840 /* This points to the Canonical Frame Address of the function. This
1841 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1842 but is calculated relative to the arg pointer for simplicity; the
1843 frame pointer nor stack pointer are necessarily fixed relative to
1844 the CFA until after reload. */
1845
1846 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1847
1848 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1849
1850 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1851
1852 /* Nonzero if REGNUM is a pointer into the stack frame. */
1853 #define REGNO_PTR_FRAME_P(REGNUM) \
1854 ((REGNUM) == STACK_POINTER_REGNUM \
1855 || (REGNUM) == FRAME_POINTER_REGNUM \
1856 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1857 || (REGNUM) == ARG_POINTER_REGNUM \
1858 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1859 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1860
1861 /* REGNUM never really appearing in the INSN stream. */
1862 #define INVALID_REGNUM (~(unsigned int) 0)
1863
1864 extern rtx output_constant_def (tree, int);
1865 extern rtx lookup_constant_def (tree);
1866
1867 /* Nonzero after the second flow pass has completed.
1868 Set to 1 or 0 by toplev.c */
1869 extern int flow2_completed;
1870
1871 /* Nonzero after end of reload pass.
1872 Set to 1 or 0 by reload1.c. */
1873
1874 extern int reload_completed;
1875
1876 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1877 extern int epilogue_completed;
1878
1879 /* Set to 1 while reload_as_needed is operating.
1880 Required by some machines to handle any generated moves differently. */
1881
1882 extern int reload_in_progress;
1883
1884 /* If this is nonzero, we do not bother generating VOLATILE
1885 around volatile memory references, and we are willing to
1886 output indirect addresses. If cse is to follow, we reject
1887 indirect addresses so a useful potential cse is generated;
1888 if it is used only once, instruction combination will produce
1889 the same indirect address eventually. */
1890 extern int cse_not_expected;
1891
1892 /* Set to nonzero before life analysis to indicate that it is unsafe to
1893 generate any new pseudo registers. */
1894 extern int no_new_pseudos;
1895
1896 /* Translates rtx code to tree code, for those codes needed by
1897 REAL_ARITHMETIC. The function returns an int because the caller may not
1898 know what `enum tree_code' means. */
1899
1900 extern int rtx_to_tree_code (enum rtx_code);
1901
1902 /* In cse.c */
1903 extern int delete_trivially_dead_insns (rtx, int);
1904 extern int cse_main (rtx, int, FILE *);
1905 extern int exp_equiv_p (rtx, rtx, int, bool);
1906 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
1907
1908 /* In jump.c */
1909 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
1910 extern int condjump_p (rtx);
1911 extern int any_condjump_p (rtx);
1912 extern int any_uncondjump_p (rtx);
1913 extern rtx pc_set (rtx);
1914 extern rtx condjump_label (rtx);
1915 extern int simplejump_p (rtx);
1916 extern int returnjump_p (rtx);
1917 extern int onlyjump_p (rtx);
1918 extern int only_sets_cc0_p (rtx);
1919 extern int sets_cc0_p (rtx);
1920 extern int invert_jump_1 (rtx, rtx);
1921 extern int invert_jump (rtx, rtx, int);
1922 extern int rtx_renumbered_equal_p (rtx, rtx);
1923 extern int true_regnum (rtx);
1924 extern unsigned int reg_or_subregno (rtx);
1925 extern int redirect_jump_1 (rtx, rtx);
1926 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
1927 extern int redirect_jump (rtx, rtx, int);
1928 extern void rebuild_jump_labels (rtx);
1929 extern rtx reversed_comparison (rtx, enum machine_mode);
1930 extern enum rtx_code reversed_comparison_code (rtx, rtx);
1931 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
1932 rtx, rtx, rtx);
1933 extern void delete_for_peephole (rtx, rtx);
1934 extern int condjump_in_parallel_p (rtx);
1935 extern void purge_line_number_notes (void);
1936
1937 /* In emit-rtl.c. */
1938 extern int max_reg_num (void);
1939 extern int max_label_num (void);
1940 extern int get_first_label_num (void);
1941 extern void maybe_set_first_label_num (rtx);
1942 extern void delete_insns_since (rtx);
1943 extern void mark_reg_pointer (rtx, int);
1944 extern void mark_user_reg (rtx);
1945 extern void reset_used_flags (rtx);
1946 extern void set_used_flags (rtx);
1947 extern void reorder_insns (rtx, rtx, rtx);
1948 extern void reorder_insns_nobb (rtx, rtx, rtx);
1949 extern int get_max_uid (void);
1950 extern int in_sequence_p (void);
1951 extern void force_next_line_note (void);
1952 extern void init_emit (void);
1953 extern void init_emit_once (int);
1954 extern void push_topmost_sequence (void);
1955 extern void pop_topmost_sequence (void);
1956 extern void set_new_first_and_last_insn (rtx, rtx);
1957 extern void unshare_all_rtl (void);
1958 extern void unshare_all_rtl_again (rtx);
1959 extern void unshare_all_rtl_in_chain (rtx);
1960 extern void verify_rtl_sharing (void);
1961 extern void set_first_insn (rtx);
1962 extern void set_last_insn (rtx);
1963 extern void link_cc0_insns (rtx);
1964 extern void add_insn (rtx);
1965 extern void add_insn_before (rtx, rtx);
1966 extern void add_insn_after (rtx, rtx);
1967 extern void remove_insn (rtx);
1968 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
1969 extern rtx emit (rtx);
1970 extern void renumber_insns (FILE *);
1971 extern void remove_unnecessary_notes (void);
1972 extern rtx delete_insn (rtx);
1973 extern rtx entry_of_function (void);
1974 extern void delete_insn_chain (rtx, rtx);
1975 extern rtx unlink_insn_chain (rtx, rtx);
1976 extern rtx delete_insn_and_edges (rtx);
1977 extern void delete_insn_chain_and_edges (rtx, rtx);
1978 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
1979 extern rtx gen_const_mem (enum machine_mode, rtx);
1980 extern rtx gen_frame_mem (enum machine_mode, rtx);
1981 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
1982 extern bool validate_subreg (enum machine_mode, enum machine_mode,
1983 rtx, unsigned int);
1984
1985 /* In combine.c */
1986 extern unsigned int extended_count (rtx, enum machine_mode, int);
1987 extern rtx remove_death (unsigned int, rtx);
1988 extern void dump_combine_stats (FILE *);
1989 extern void dump_combine_total_stats (FILE *);
1990
1991 /* In sched-vis.c. */
1992 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
1993 extern void dump_insn_slim (FILE *f, rtx x);
1994 extern void debug_insn_slim (rtx x);
1995
1996 /* In sched-rgn.c. */
1997 extern void schedule_insns (FILE *);
1998
1999 /* In sched-ebb.c. */
2000 extern void schedule_ebbs (FILE *);
2001
2002 /* In haifa-sched.c. */
2003 extern void fix_sched_param (const char *, const char *);
2004
2005 /* In print-rtl.c */
2006 extern const char *print_rtx_head;
2007 extern void debug_rtx (rtx);
2008 extern void debug_rtx_list (rtx, int);
2009 extern void debug_rtx_range (rtx, rtx);
2010 extern rtx debug_rtx_find (rtx, int);
2011 extern void print_mem_expr (FILE *, tree);
2012 extern void print_rtl (FILE *, rtx);
2013 extern void print_simple_rtl (FILE *, rtx);
2014 extern int print_rtl_single (FILE *, rtx);
2015 extern void print_inline_rtx (FILE *, rtx, int);
2016
2017 /* In loop.c */
2018 extern void init_loop (void);
2019
2020 /* In bt-load.c */
2021 extern void branch_target_load_optimize (bool);
2022
2023 /* In function.c */
2024 extern void reposition_prologue_and_epilogue_notes (rtx);
2025 extern void thread_prologue_and_epilogue_insns (rtx);
2026 extern int prologue_epilogue_contains (rtx);
2027 extern int sibcall_epilogue_contains (rtx);
2028 extern void mark_temp_addr_taken (rtx);
2029 extern void update_temp_slot_address (rtx, rtx);
2030
2031 /* In stmt.c */
2032 extern void expand_null_return (void);
2033 extern void expand_naked_return (void);
2034 extern void emit_jump (rtx);
2035
2036 /* In expr.c */
2037 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2038 unsigned int, int);
2039
2040 /* In flow.c */
2041 extern void recompute_reg_usage (void);
2042 extern void delete_dead_jumptables (void);
2043 extern void print_rtl_with_bb (FILE *, rtx);
2044 extern void dump_flow_info (FILE *);
2045
2046 /* In expmed.c */
2047 extern void init_expmed (void);
2048 extern void expand_inc (rtx, rtx);
2049 extern void expand_dec (rtx, rtx);
2050
2051 /* In gcse.c */
2052 extern bool can_copy_p (enum machine_mode);
2053 extern rtx fis_get_condition (rtx);
2054
2055 /* In global.c */
2056 extern void mark_elimination (int, int);
2057 extern void dump_global_regs (FILE *);
2058 #ifdef HARD_CONST
2059 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2060 extern void retry_global_alloc (int, HARD_REG_SET);
2061 #endif
2062 extern void build_insn_chain (rtx);
2063
2064 /* In regclass.c */
2065 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2066 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2067 extern void globalize_reg (int);
2068 extern void init_reg_modes_once (void);
2069 extern void init_regs (void);
2070 extern void init_fake_stack_mems (void);
2071 extern void init_reg_sets (void);
2072 extern void regclass_init (void);
2073 extern void regclass (rtx, int, FILE *);
2074 extern void reg_scan (rtx, unsigned int);
2075 extern void reg_scan_update (rtx, rtx, unsigned int);
2076 extern void fix_register (const char *, int, int);
2077 extern void init_subregs_of_mode (void);
2078 extern void record_subregs_of_mode (rtx);
2079 #ifdef HARD_CONST
2080 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2081 enum machine_mode, unsigned int);
2082 #endif
2083 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2084 enum machine_mode);
2085
2086 /* In reorg.c */
2087 extern void dbr_schedule (rtx, FILE *);
2088
2089 /* In local-alloc.c */
2090 extern void dump_local_alloc (FILE *);
2091
2092 /* In reload1.c */
2093 extern int function_invariant_p (rtx);
2094
2095 /* In calls.c */
2096 enum libcall_type
2097 {
2098 LCT_NORMAL = 0,
2099 LCT_CONST = 1,
2100 LCT_PURE = 2,
2101 LCT_CONST_MAKE_BLOCK = 3,
2102 LCT_PURE_MAKE_BLOCK = 4,
2103 LCT_NORETURN = 5,
2104 LCT_THROW = 6,
2105 LCT_RETURNS_TWICE = 7
2106 };
2107
2108 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2109 ...);
2110 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2111 enum machine_mode, int, ...);
2112
2113 /* In varasm.c */
2114 extern void init_varasm_once (void);
2115 extern enum tls_model decl_default_tls_model (tree);
2116
2117 /* In rtl.c */
2118 extern void traverse_md_constants (int (*) (void **, void *), void *);
2119 struct md_constant { char *name, *value; };
2120
2121 /* In read-rtl.c */
2122 extern int read_skip_spaces (FILE *);
2123 extern bool read_rtx (FILE *, rtx *, int *);
2124 extern void copy_rtx_ptr_loc (const void *, const void *);
2125 extern void print_rtx_ptr_loc (const void *);
2126 extern const char *join_c_conditions (const char *, const char *);
2127 extern void print_c_condition (const char *);
2128 extern const char *read_rtx_filename;
2129 extern int read_rtx_lineno;
2130
2131 /* In alias.c */
2132 extern void clear_reg_alias_info (rtx);
2133 extern rtx canon_rtx (rtx);
2134 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2135 extern rtx get_addr (rtx);
2136 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2137 int (*)(rtx, int));
2138 extern int read_dependence (rtx, rtx);
2139 extern int anti_dependence (rtx, rtx);
2140 extern int output_dependence (rtx, rtx);
2141 extern void mark_constant_function (void);
2142 extern void init_alias_once (void);
2143 extern void init_alias_analysis (void);
2144 extern void end_alias_analysis (void);
2145 extern bool memory_modified_in_insn_p (rtx, rtx);
2146 extern rtx find_base_term (rtx);
2147 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2148 extern rtx get_reg_known_value (unsigned int);
2149 extern bool get_reg_known_equiv_p (unsigned int);
2150
2151 #ifdef STACK_REGS
2152 extern int stack_regs_mentioned (rtx insn);
2153 #endif
2154
2155 /* In toplev.c */
2156 extern GTY(()) rtx stack_limit_rtx;
2157
2158 /* In predict.c */
2159 extern void invert_br_probabilities (rtx);
2160 extern bool expensive_function_p (int);
2161 /* In tracer.c */
2162 extern void tracer (unsigned int);
2163
2164 /* In var-tracking.c */
2165 extern void variable_tracking_main (void);
2166
2167 /* In stor-layout.c. */
2168 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2169 rtx *, rtx *);
2170
2171 /* In loop-unswitch.c */
2172 extern rtx reversed_condition (rtx);
2173 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2174
2175 /* In loop-iv.c */
2176 extern rtx canon_condition (rtx);
2177 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2178 \f
2179 struct rtl_hooks
2180 {
2181 rtx (*gen_lowpart) (enum machine_mode, rtx);
2182 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2183 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2184 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2185 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2186 unsigned int, unsigned int *);
2187
2188 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2189 };
2190
2191 /* Each pass can provide its own. */
2192 extern struct rtl_hooks rtl_hooks;
2193
2194 /* ... but then it has to restore these. */
2195 extern const struct rtl_hooks general_rtl_hooks;
2196
2197 /* Keep this for the nonce. */
2198 #define gen_lowpart rtl_hooks.gen_lowpart
2199
2200 #endif /* ! GCC_RTL_H */