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2004-10-07 J"orn Rennecke <joern.rennecke@st.com>
[official-gcc.git] / gcc / rtl.h
blobe0f86ee1c3df7ce991863f8ce4cb2fe76b2c9c52
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 #include "statistics.h"
26 #include "machmode.h"
27 #include "input.h"
28
29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
30 #undef FLOAT /* Likewise. */
31 #undef ABS /* Likewise. */
32 #undef PC /* Likewise. */
33
34 /* Value used by some passes to "recognize" noop moves as valid
35 instructions. */
36 #define NOOP_MOVE_INSN_CODE INT_MAX
37
38 /* Register Transfer Language EXPRESSIONS CODES */
39
40 #define RTX_CODE enum rtx_code
41 enum rtx_code {
42
43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
44 #include "rtl.def" /* rtl expressions are documented here */
45 #undef DEF_RTL_EXPR
46
47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
48 NUM_RTX_CODE.
49 Assumes default enum value assignment. */
50
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52 /* The cast here, saves many elsewhere. */
53
54 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
55
56 enum rtx_class {
57 /* We check bit 0-1 of some rtx class codes in the predicates below. */
58
59 /* Bit 0 = comparison if 0, arithmetic is 1
60 Bit 1 = 1 if commutative. */
61 RTX_COMPARE, /* 0 */
62 RTX_COMM_COMPARE,
63 RTX_BIN_ARITH,
64 RTX_COMM_ARITH,
65
66 /* Must follow the four preceding values. */
67 RTX_UNARY, /* 4 */
68
69 RTX_EXTRA,
70 RTX_MATCH,
71 RTX_INSN,
72
73 /* Bit 0 = 1 if constant. */
74 RTX_OBJ, /* 8 */
75 RTX_CONST_OBJ,
76
77 RTX_TERNARY,
78 RTX_BITFIELD_OPS,
79 RTX_AUTOINC
80 };
81
82 #define RTX_OBJ_MASK (~1)
83 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
84 #define RTX_COMPARE_MASK (~1)
85 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
86 #define RTX_ARITHMETIC_MASK (~1)
87 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
88 #define RTX_BINARY_MASK (~3)
89 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
90 #define RTX_COMMUTATIVE_MASK (~2)
91 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
92 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
93 #define RTX_EXPR_FIRST (RTX_COMPARE)
94 #define RTX_EXPR_LAST (RTX_UNARY)
95
96 extern const unsigned char rtx_length[NUM_RTX_CODE];
97 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
98
99 extern const char * const rtx_name[NUM_RTX_CODE];
100 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
101
102 extern const char * const rtx_format[NUM_RTX_CODE];
103 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
104
105 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
106 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
107
108 extern const unsigned char rtx_size[NUM_RTX_CODE];
109 extern const unsigned char rtx_next[NUM_RTX_CODE];
110 \f
111 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
112 relative to which the offsets are calculated, as explained in rtl.def. */
113 typedef struct
114 {
115 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
116 unsigned min_align: 8;
117 /* Flags: */
118 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
119 unsigned min_after_vec: 1; /* minimum address target label is
120 after the ADDR_DIFF_VEC. */
121 unsigned max_after_vec: 1; /* maximum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned min_after_base: 1; /* minimum address target label is
124 after BASE. */
125 unsigned max_after_base: 1; /* maximum address target label is
126 after BASE. */
127 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
128 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
129 unsigned : 2;
130 unsigned scale : 8;
131 } addr_diff_vec_flags;
132
133 /* Structure used to describe the attributes of a MEM. These are hashed
134 so MEMs that the same attributes share a data structure. This means
135 they cannot be modified in place. If any element is nonzero, it means
136 the value of the corresponding attribute is unknown. */
137 /* ALIGN and SIZE are the alignment and size of the MEM itself,
138 while EXPR can describe a larger underlying object, which might have a
139 stricter alignment; OFFSET is the offset of the MEM within that object. */
140 typedef struct mem_attrs GTY(())
141 {
142 HOST_WIDE_INT alias; /* Memory alias set. */
143 tree expr; /* expr corresponding to MEM. */
144 rtx offset; /* Offset from start of DECL, as CONST_INT. */
145 rtx size; /* Size in bytes, as a CONST_INT. */
146 unsigned int align; /* Alignment of MEM in bits. */
147 } mem_attrs;
148
149 /* Structure used to describe the attributes of a REG in similar way as
150 mem_attrs does for MEM above. */
151
152 typedef struct reg_attrs GTY(())
153 {
154 tree decl; /* decl corresponding to REG. */
155 HOST_WIDE_INT offset; /* Offset from start of DECL. */
156 } reg_attrs;
157
158 /* Common union for an element of an rtx. */
159
160 union rtunion_def
161 {
162 int rt_int;
163 unsigned int rt_uint;
164 const char *rt_str;
165 rtx rt_rtx;
166 rtvec rt_rtvec;
167 enum machine_mode rt_type;
168 addr_diff_vec_flags rt_addr_diff_vec_flags;
169 struct cselib_val_struct *rt_cselib;
170 struct bitmap_head_def *rt_bit;
171 tree rt_tree;
172 struct basic_block_def *rt_bb;
173 mem_attrs *rt_mem;
174 reg_attrs *rt_reg;
175 };
176 typedef union rtunion_def rtunion;
177
178 /* RTL expression ("rtx"). */
179
180 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
181 chain_prev ("RTX_PREV (&%h)")))
182 {
183 /* The kind of expression this is. */
184 ENUM_BITFIELD(rtx_code) code: 16;
185
186 /* The kind of value the expression has. */
187 ENUM_BITFIELD(machine_mode) mode : 8;
188
189 /* 1 in a MEM if we should keep the alias set for this mem unchanged
190 when we access a component.
191 1 in a CALL_INSN if it is a sibling call.
192 1 in a SET that is for a return.
193 In a CODE_LABEL, part of the two-bit alternate entry field. */
194 unsigned int jump : 1;
195 /* In a CODE_LABEL, part of the two-bit alternate entry field.
196 1 in a MEM if it cannot trap. */
197 unsigned int call : 1;
198 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
199 1 in a SUBREG if it references an unsigned object whose mode has been
200 from a promoted to a wider mode.
201 1 in a SYMBOL_REF if it addresses something in the per-function
202 constants pool.
203 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call.
204 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
205 unsigned int unchanging : 1;
206 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
207 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
208 if it has been deleted.
209 1 in a REG expression if corresponds to a variable declared by the user,
210 0 for an internally generated temporary.
211 1 in a SUBREG with a negative value.
212 1 in a LABEL_REF or in a REG_LABEL note for a non-local label.
213 In a SYMBOL_REF, this flag is used for machine-specific purposes. */
214 unsigned int volatil : 1;
215 /* 1 in a MEM referring to a field of an aggregate.
216 0 if the MEM was a variable or the result of a * operator in C;
217 1 if it was the result of a . or -> operator (on a struct) in C.
218 1 in a REG if the register is used only in exit code a loop.
219 1 in a SUBREG expression if was generated from a variable with a
220 promoted mode.
221 1 in a CODE_LABEL if the label is used for nonlocal gotos
222 and must not be deleted even if its count is zero.
223 1 in a LABEL_REF if this is a reference to a label outside the
224 current loop.
225 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
226 together with the preceding insn. Valid only within sched.
227 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
228 from the target of a branch. Valid from reorg until end of compilation;
229 cleared before used.
230 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is
231 dead code. Valid only during dead-code elimination phase; cleared
232 before use. */
233 unsigned int in_struct : 1;
234 /* At the end of RTL generation, 1 if this rtx is used. This is used for
235 copying shared structure. See `unshare_all_rtl'.
236 In a REG, this is not needed for that purpose, and used instead
237 in `leaf_renumber_regs_insn'.
238 1 in a SYMBOL_REF, means that emit_library_call
239 has used it as the function. */
240 unsigned int used : 1;
241 /* 1 in an INSN or a SET if this rtx is related to the call frame,
242 either changing how we compute the frame address or saving and
243 restoring registers in the prologue and epilogue.
244 1 in a REG or MEM if it is a pointer.
245 1 in a SYMBOL_REF if it addresses something in the per-function
246 constant string pool. */
247 unsigned frame_related : 1;
248 /* 1 in a REG or PARALLEL that is the current function's return value.
249 1 in a MEM if it refers to a scalar.
250 1 in a SYMBOL_REF for a weak symbol. */
251 unsigned return_val : 1;
252
253 /* The first element of the operands of this rtx.
254 The number of operands and their types are controlled
255 by the `code' field, according to rtl.def. */
256 union u {
257 rtunion fld[1];
258 HOST_WIDE_INT hwint[1];
259 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
260 };
261
262 /* The size in bytes of an rtx header (code, mode and flags). */
263 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
264
265 /* The size in bytes of an rtx with code CODE. */
266 #define RTX_SIZE(CODE) rtx_size[CODE]
267
268 #define NULL_RTX (rtx) 0
269
270 /* The "next" and "previous" RTX, relative to this one. */
271
272 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
273 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
274
275 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
276 */
277 #define RTX_PREV(X) ((INSN_P (X) \
278 || NOTE_P (X) \
279 || BARRIER_P (X) \
280 || LABEL_P (X)) \
281 && PREV_INSN (X) != NULL \
282 && NEXT_INSN (PREV_INSN (X)) == X \
283 ? PREV_INSN (X) : NULL)
284
285 /* Define macros to access the `code' field of the rtx. */
286
287 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
288 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
289
290 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
291 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
292
293 /* RTL vector. These appear inside RTX's when there is a need
294 for a variable number of things. The principle use is inside
295 PARALLEL expressions. */
296
297 struct rtvec_def GTY(()) {
298 int num_elem; /* number of elements */
299 rtx GTY ((length ("%h.num_elem"))) elem[1];
300 };
301
302 #define NULL_RTVEC (rtvec) 0
303
304 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
305 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
306
307 /* Predicate yielding nonzero iff X is an rtx for a register. */
308 #define REG_P(X) (GET_CODE (X) == REG)
309
310 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
311 #define MEM_P(X) (GET_CODE (X) == MEM)
312
313 /* Predicate yielding nonzero iff X is a label insn. */
314 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
315
316 /* Predicate yielding nonzero iff X is a jump insn. */
317 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
318
319 /* Predicate yielding nonzero iff X is a call insn. */
320 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
321
322 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
323 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
324
325 /* Predicate yielding nonzero iff X is a real insn. */
326 #define INSN_P(X) \
327 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X))
328
329 /* Predicate yielding nonzero iff X is a note insn. */
330 #define NOTE_P(X) (GET_CODE (X) == NOTE)
331
332 /* Predicate yielding nonzero iff X is a barrier insn. */
333 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
334
335 /* Predicate yielding nonzero iff X is a data for a jump table. */
336 #define JUMP_TABLE_DATA_P(INSN) \
337 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
338 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
339
340 /* 1 if X is a unary operator. */
341
342 #define UNARY_P(X) \
343 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
344
345 /* 1 if X is a binary operator. */
346
347 #define BINARY_P(X) \
348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
349
350 /* 1 if X is an arithmetic operator. */
351
352 #define ARITHMETIC_P(X) \
353 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
354 == RTX_ARITHMETIC_RESULT)
355
356 /* 1 if X is an arithmetic operator. */
357
358 #define COMMUTATIVE_ARITH_P(X) \
359 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
360
361 /* 1 if X is a commutative arithmetic operator or a comparison operator.
362 These two are sometimes selected together because it is possible to
363 swap the two operands. */
364
365 #define SWAPPABLE_OPERANDS_P(X) \
366 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
367 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
368 | (1 << RTX_COMPARE)))
369
370 /* 1 if X is a non-commutative operator. */
371
372 #define NON_COMMUTATIVE_P(X) \
373 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
374 == RTX_NON_COMMUTATIVE_RESULT)
375
376 /* 1 if X is a commutative operator on integers. */
377
378 #define COMMUTATIVE_P(X) \
379 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
380 == RTX_COMMUTATIVE_RESULT)
381
382 /* 1 if X is a relational operator. */
383
384 #define COMPARISON_P(X) \
385 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
386
387 /* 1 if X is a constant value that is an integer. */
388
389 #define CONSTANT_P(X) \
390 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ \
391 || GET_CODE (X) == CONST_VECTOR)
392
393 /* 1 if X can be used to represent an object. */
394 #define OBJECT_P(X) \
395 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
396
397 /* General accessor macros for accessing the fields of an rtx. */
398
399 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
400 /* The bit with a star outside the statement expr and an & inside is
401 so that N can be evaluated only once. */
402 #define RTL_CHECK1(RTX, N, C1) __extension__ \
403 (*({ rtx const _rtx = (RTX); const int _n = (N); \
404 const enum rtx_code _code = GET_CODE (_rtx); \
405 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
406 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
407 __FUNCTION__); \
408 if (GET_RTX_FORMAT(_code)[_n] != C1) \
409 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
410 __FUNCTION__); \
411 &_rtx->u.fld[_n]; }))
412
413 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
414 (*({ rtx const _rtx = (RTX); const int _n = (N); \
415 const enum rtx_code _code = GET_CODE (_rtx); \
416 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
417 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
418 __FUNCTION__); \
419 if (GET_RTX_FORMAT(_code)[_n] != C1 \
420 && GET_RTX_FORMAT(_code)[_n] != C2) \
421 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
422 __FUNCTION__); \
423 &_rtx->u.fld[_n]; }))
424
425 #define RTL_CHECKC1(RTX, N, C) __extension__ \
426 (*({ rtx const _rtx = (RTX); const int _n = (N); \
427 if (GET_CODE (_rtx) != (C)) \
428 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
429 __FUNCTION__); \
430 &_rtx->u.fld[_n]; }))
431
432 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
433 (*({ rtx const _rtx = (RTX); const int _n = (N); \
434 const enum rtx_code _code = GET_CODE (_rtx); \
435 if (_code != (C1) && _code != (C2)) \
436 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
437 __FUNCTION__); \
438 &_rtx->u.fld[_n]; }))
439
440 #define RTVEC_ELT(RTVEC, I) __extension__ \
441 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \
442 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
443 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
444 __FUNCTION__); \
445 &_rtvec->elem[_i]; }))
446
447 #define XWINT(RTX, N) __extension__ \
448 (*({ rtx const _rtx = (RTX); const int _n = (N); \
449 const enum rtx_code _code = GET_CODE (_rtx); \
450 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
451 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
452 __FUNCTION__); \
453 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
454 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
455 __FUNCTION__); \
456 &_rtx->u.hwint[_n]; }))
457
458 #define XCWINT(RTX, N, C) __extension__ \
459 (*({ rtx const _rtx = (RTX); \
460 if (GET_CODE (_rtx) != (C)) \
461 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
462 __FUNCTION__); \
463 &_rtx->u.hwint[N]; }))
464
465 extern void rtl_check_failed_bounds (rtx, int, const char *, int,
466 const char *)
467 ATTRIBUTE_NORETURN;
468 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int,
469 const char *)
470 ATTRIBUTE_NORETURN;
471 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *,
472 int, const char *)
473 ATTRIBUTE_NORETURN;
474 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *,
475 int, const char *)
476 ATTRIBUTE_NORETURN;
477 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code,
478 const char *, int, const char *)
479 ATTRIBUTE_NORETURN;
480 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int,
481 const char *)
482 ATTRIBUTE_NORETURN;
483
484 #else /* not ENABLE_RTL_CHECKING */
485
486 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
487 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
488 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
489 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
490 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
491 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
492 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
493
494 #endif
495
496 /* General accessor macros for accessing the flags of an rtx. */
497
498 /* Access an individual rtx flag, with no checking of any kind. */
499 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
500
501 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
502 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
503 ({ rtx const _rtx = (RTX); \
504 if (GET_CODE(_rtx) != C1) \
505 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
506 __FUNCTION__); \
507 _rtx; })
508
509 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
510 ({ rtx const _rtx = (RTX); \
511 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
512 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
513 __FUNCTION__); \
514 _rtx; })
515
516 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
517 ({ rtx const _rtx = (RTX); \
518 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
519 && GET_CODE(_rtx) != C3) \
520 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
521 __FUNCTION__); \
522 _rtx; })
523
524 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
525 ({ rtx const _rtx = (RTX); \
526 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
527 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
528 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
529 __FUNCTION__); \
530 _rtx; })
531
532 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
533 ({ rtx const _rtx = (RTX); \
534 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
535 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
536 && GET_CODE(_rtx) != C5) \
537 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
538 __FUNCTION__); \
539 _rtx; })
540
541 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
542 __extension__ \
543 ({ rtx const _rtx = (RTX); \
544 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
545 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
546 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
547 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
548 __FUNCTION__); \
549 _rtx; })
550
551 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
552 __extension__ \
553 ({ rtx const _rtx = (RTX); \
554 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
555 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
556 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
557 && GET_CODE(_rtx) != C7) \
558 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
559 __FUNCTION__); \
560 _rtx; })
561
562 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
563 __extension__ \
564 ({ rtx const _rtx = (RTX); \
565 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
566 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
567 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
568 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
569 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
570 __FUNCTION__); \
571 _rtx; })
572
573 extern void rtl_check_failed_flag (const char *, rtx, const char *,
574 int, const char *)
575 ATTRIBUTE_NORETURN
576 ;
577
578 #else /* not ENABLE_RTL_FLAG_CHECKING */
579
580 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
581 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
582 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
583 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
584 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
585 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
586 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
587 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
588 #endif
589
590 #define CLEAR_RTX_FLAGS(RTX) \
591 do { \
592 rtx const _rtx = (RTX); \
593 _rtx->jump = 0; \
594 _rtx->call = 0; \
595 _rtx->unchanging = 0; \
596 _rtx->volatil = 0; \
597 _rtx->in_struct = 0; \
598 _rtx->used = 0; \
599 _rtx->frame_related = 0; \
600 _rtx->return_val = 0; \
601 } while (0)
602
603 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
604 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
605 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
606 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
607 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
608 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
609 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
610 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
611 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
612
613 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
614 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
615
616 /* These are like XINT, etc. except that they expect a '0' field instead
617 of the normal type code. */
618
619 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
620 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
621 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
622 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
623 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
624 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
625 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
626 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
627 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
628 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
629 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
630 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
631 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
632
633 /* Access a '0' field with any type. */
634 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
635
636 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
637 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
638 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
639 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
640 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
641 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
642 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
643 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
644 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
645 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags)
646 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
647
648 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
649 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
650
651 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
652 \f
653 /* ACCESS MACROS for particular fields of insns. */
654
655 /* Holds a unique number for each insn.
656 These are not necessarily sequentially increasing. */
657 #define INSN_UID(INSN) XINT (INSN, 0)
658
659 /* Chain insns together in sequence. */
660 #define PREV_INSN(INSN) XEXP (INSN, 1)
661 #define NEXT_INSN(INSN) XEXP (INSN, 2)
662
663 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
664 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
665 /* The body of an insn. */
666 #define PATTERN(INSN) XEXP (INSN, 5)
667
668 /* Code number of instruction, from when it was recognized.
669 -1 means this instruction has not been recognized yet. */
670 #define INSN_CODE(INSN) XINT (INSN, 6)
671
672 /* Set up in flow.c; empty before then.
673 Holds a chain of INSN_LIST rtx's whose first operands point at
674 previous insns with direct data-flow connections to this one.
675 That means that those insns set variables whose next use is in this insn.
676 They are always in the same basic block as this insn. */
677 #define LOG_LINKS(INSN) XEXP(INSN, 7)
678
679 #define RTX_FRAME_RELATED_P(RTX) \
680 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
681 JUMP_INSN, BARRIER, SET)->frame_related)
682
683 /* 1 if RTX is an insn that has been deleted. */
684 #define INSN_DELETED_P(RTX) \
685 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \
686 CODE_LABEL, BARRIER, NOTE)->volatil)
687
688 /* 1 if RTX is a call to a const or pure function. */
689 #define CONST_OR_PURE_CALL_P(RTX) \
690 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \
691 EXPR_LIST)->unchanging)
692
693 /* 1 if RTX is a call_insn for a sibling call. */
694 #define SIBLING_CALL_P(RTX) \
695 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
696
697 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
698 #define INSN_ANNULLED_BRANCH_P(RTX) \
699 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
700
701 /* 1 if RTX is an insn that is dead code. Valid only for dead-code
702 elimination phase. */
703 #define INSN_DEAD_CODE_P(RTX) \
704 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct)
705
706 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
707 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
708 executed if the branch is taken. For annulled branches with this bit
709 clear, the insn should be executed only if the branch is not taken. */
710 #define INSN_FROM_TARGET_P(RTX) \
711 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
712
713 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
714
715 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
716
717 /* Holds a list of notes on what this insn does to various REGs.
718 It is a chain of EXPR_LIST rtx's, where the second operand is the
719 chain pointer and the first operand is the REG being described.
720 The mode field of the EXPR_LIST contains not a real machine mode
721 but a value from enum reg_note. */
722
723 #define REG_NOTES(INSN) XEXP(INSN, 8)
724
725 enum reg_note
726 {
727 #define DEF_REG_NOTE(NAME) NAME,
728 #include "reg-notes.def"
729 #undef DEF_REG_NOTE
730 REG_NOTE_MAX
731 };
732
733 /* The base value for branch probability notes. */
734 #define REG_BR_PROB_BASE 10000
735
736 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
737 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
738 #define PUT_REG_NOTE_KIND(LINK, KIND) \
739 PUT_MODE (LINK, (enum machine_mode) (KIND))
740
741 /* Names for REG_NOTE's in EXPR_LIST insn's. */
742
743 extern const char * const reg_note_name[];
744 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
745
746 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
747 USE and CLOBBER expressions.
748 USE expressions list the registers filled with arguments that
749 are passed to the function.
750 CLOBBER expressions document the registers explicitly clobbered
751 by this CALL_INSN.
752 Pseudo registers can not be mentioned in this list. */
753 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9)
754
755 /* The label-number of a code-label. The assembler label
756 is made from `L' and the label-number printed in decimal.
757 Label numbers are unique in a compilation. */
758 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
759
760 #define LINE_NUMBER NOTE
761
762 /* In a NOTE that is a line number, this is a string for the file name that the
763 line is in. We use the same field to record block numbers temporarily in
764 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
765 between ints and pointers if we use a different macro for the block number.)
766 */
767
768 /* Opaque data. */
769 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
770 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
771 #ifdef USE_MAPPED_LOCATION
772 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE)
773 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
774 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN))
775 #define SET_INSN_DELETED(INSN) \
776 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
777 #else
778 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \
779 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \
780 (XLOC).line = NOTE_LINE_NUMBER (INSN))
781 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE)
782 #define SET_INSN_DELETED(INSN) \
783 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \
784 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED)
785 #endif
786 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
787 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
788 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
789 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE)
790 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE)
791 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
792
793 /* In a NOTE that is a line number, this is the line number.
794 Other kinds of NOTEs are identified by negative numbers here. */
795 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE)
796
797 /* Nonzero if INSN is a note marking the beginning of a basic block. */
798 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
799 (GET_CODE (INSN) == NOTE \
800 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK)
801
802 /* Algorithm and flags for prediction. */
803 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8)
804 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff)
805 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS))
806
807 /* Variable declaration and the location of a variable. */
808 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \
809 0, VAR_LOCATION))
810 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \
811 1, VAR_LOCATION))
812
813 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes
814 that are not line numbers. These codes are all negative.
815
816 Notice that we do not try to use zero here for any of
817 the special note codes because sometimes the source line
818 actually can be zero! This happens (for example) when we
819 are generating code for the per-translation-unit constructor
820 and destructor routines for some C++ translation unit. */
821
822 enum insn_note
823 {
824 /* Keep all of these numbers negative. Adjust as needed. */
825 NOTE_INSN_BIAS = -100,
826
827 #define DEF_INSN_NOTE(NAME) NAME,
828 #include "insn-notes.def"
829 #undef DEF_INSN_NOTE
830
831 NOTE_INSN_MAX
832 };
833
834 /* Names for NOTE insn's other than line numbers. */
835
836 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS];
837 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
838 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS])
839
840 /* The name of a label, in case it corresponds to an explicit label
841 in the input source code. */
842 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
843
844 /* In jump.c, each label contains a count of the number
845 of LABEL_REFs that point at it, so unused labels can be deleted. */
846 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
847
848 /* Labels carry a two-bit field composed of the ->jump and ->call
849 bits. This field indicates whether the label is an alternate
850 entry point, and if so, what kind. */
851 enum label_kind
852 {
853 LABEL_NORMAL = 0, /* ordinary label */
854 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
855 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
856 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
857 };
858
859 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
860
861 /* Retrieve the kind of LABEL. */
862 #define LABEL_KIND(LABEL) __extension__ \
863 ({ rtx const _label = (LABEL); \
864 if (GET_CODE (_label) != CODE_LABEL) \
865 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
866 __FUNCTION__); \
867 (enum label_kind) ((_label->jump << 1) | _label->call); })
868
869 /* Set the kind of LABEL. */
870 #define SET_LABEL_KIND(LABEL, KIND) do { \
871 rtx _label = (LABEL); \
872 unsigned int _kind = (KIND); \
873 if (GET_CODE (_label) != CODE_LABEL) \
874 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
875 __FUNCTION__); \
876 _label->jump = ((_kind >> 1) & 1); \
877 _label->call = (_kind & 1); \
878 } while (0)
879
880 #else
881
882 /* Retrieve the kind of LABEL. */
883 #define LABEL_KIND(LABEL) \
884 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
885
886 /* Set the kind of LABEL. */
887 #define SET_LABEL_KIND(LABEL, KIND) do { \
888 rtx _label = (LABEL); \
889 unsigned int _kind = (KIND); \
890 _label->jump = ((_kind >> 1) & 1); \
891 _label->call = (_kind & 1); \
892 } while (0)
893
894 #endif /* rtl flag checking */
895
896 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
897
898 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
899 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
900 be decremented and possibly the label can be deleted. */
901 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN)
902
903 /* Once basic blocks are found in flow.c,
904 each CODE_LABEL starts a chain that goes through
905 all the LABEL_REFs that jump to that label.
906 The chain eventually winds up at the CODE_LABEL: it is circular. */
907 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
908 \f
909 /* This is the field in the LABEL_REF through which the circular chain
910 of references to a particular label is linked.
911 This chain is set up in flow.c. */
912
913 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF)
914
915 /* Once basic blocks are found in flow.c,
916 Each LABEL_REF points to its containing instruction with this field. */
917
918 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF)
919
920 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds
921 the number the register originally had; for a pseudo register turned into
922 a hard reg this will hold the old pseudo register number. */
923
924 #define REGNO(RTX) XCUINT (RTX, 0, REG)
925 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
926
927 /* 1 if RTX is a reg or parallel that is the current function's return
928 value. */
929 #define REG_FUNCTION_VALUE_P(RTX) \
930 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
931
932 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
933 #define REG_USERVAR_P(RTX) \
934 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
935
936 /* 1 if RTX is a reg that holds a pointer value. */
937 #define REG_POINTER(RTX) \
938 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
939
940 /* 1 if RTX is a mem that holds a pointer value. */
941 #define MEM_POINTER(RTX) \
942 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
943
944 /* 1 if the given register REG corresponds to a hard register. */
945 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
946
947 /* 1 if the given register number REG_NO corresponds to a hard register. */
948 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
949
950 /* For a CONST_INT rtx, INTVAL extracts the integer. */
951
952 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
953
954 /* For a CONST_DOUBLE:
955 For a DImode, there are two integers CONST_DOUBLE_LOW is the
956 low-order word and ..._HIGH the high-order.
957 For a float, there is a REAL_VALUE_TYPE structure, and
958 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
959 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE)
960 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE)
961 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r))
962
963 /* For a CONST_VECTOR, return element #n. */
964 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
965
966 /* For a CONST_VECTOR, return the number of elements in a vector. */
967 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
968
969 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
970 SUBREG_BYTE extracts the byte-number. */
971
972 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
973 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
974
975 /* in rtlanal.c */
976 /* Return the right cost to give to an operation
977 to make the cost of the corresponding register-to-register instruction
978 N times that of a fast register-to-register instruction. */
979 #define COSTS_N_INSNS(N) ((N) * 4)
980
981 /* Maximum cost of an rtl expression. This value has the special meaning
982 not to use an rtx with this cost under any circumstances. */
983 #define MAX_COST INT_MAX
984
985 extern int rtx_cost (rtx, enum rtx_code);
986 extern int address_cost (rtx, enum machine_mode);
987 extern unsigned int subreg_lsb (rtx);
988 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
989 unsigned int);
990 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
991 unsigned int, enum machine_mode);
992 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
993 unsigned int, enum machine_mode);
994 extern unsigned int subreg_regno (rtx);
995 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode);
996 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode);
997
998
999 /* 1 if RTX is a subreg containing a reg that is already known to be
1000 sign- or zero-extended from the mode of the subreg to the mode of
1001 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1002 extension.
1003
1004 When used as a LHS, is means that this extension must be done
1005 when assigning to SUBREG_REG. */
1006
1007 #define SUBREG_PROMOTED_VAR_P(RTX) \
1008 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1009
1010 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1011 do { \
1012 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1013 if ((VAL) < 0) \
1014 _rtx->volatil = 1; \
1015 else { \
1016 _rtx->volatil = 0; \
1017 _rtx->unchanging = (VAL); \
1018 } \
1019 } while (0)
1020 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1021 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1022 ? -1 : (RTX)->unchanging)
1023
1024 /* Access various components of an ASM_OPERANDS rtx. */
1025
1026 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1027 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1028 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1029 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1030 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1031 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1032 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1033 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1034 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1035 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1036 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1037 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1038 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1039 #ifdef USE_MAPPED_LOCATION
1040 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS)
1041 #else
1042 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS)
1043 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
1044 #endif
1045
1046 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1047 #define MEM_READONLY_P(RTX) \
1048 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1049
1050 /* 1 if RTX is a mem and we should keep the alias set for this mem
1051 unchanged when we access a component. Set to 1, or example, when we
1052 are already in a non-addressable component of an aggregate. */
1053 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1054 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1055
1056 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1057 #define MEM_VOLATILE_P(RTX) \
1058 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1059 ASM_INPUT)->volatil)
1060
1061 /* 1 if RTX is a mem that refers to an aggregate, either to the
1062 aggregate itself of to a field of the aggregate. If zero, RTX may
1063 or may not be such a reference. */
1064 #define MEM_IN_STRUCT_P(RTX) \
1065 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1066
1067 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1068 not refer to a scalar. */
1069 #define MEM_SCALAR_P(RTX) \
1070 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1071
1072 /* 1 if RTX is a mem that cannot trap. */
1073 #define MEM_NOTRAP_P(RTX) \
1074 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1075
1076 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1077 RTX. Otherwise, vice versa. Use this macro only when you are
1078 *sure* that you know that the MEM is in a structure, or is a
1079 scalar. VAL is evaluated only once. */
1080 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1081 do { \
1082 if (VAL) \
1083 { \
1084 MEM_IN_STRUCT_P (RTX) = 1; \
1085 MEM_SCALAR_P (RTX) = 0; \
1086 } \
1087 else \
1088 { \
1089 MEM_IN_STRUCT_P (RTX) = 0; \
1090 MEM_SCALAR_P (RTX) = 1; \
1091 } \
1092 } while (0)
1093
1094 /* The memory attribute block. We provide access macros for each value
1095 in the block and provide defaults if none specified. */
1096 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1097
1098 /* The register attribute block. We provide access macros for each value
1099 in the block and provide defaults if none specified. */
1100 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1101
1102 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1103 set, and may alias anything. Otherwise, the MEM can only alias
1104 MEMs in a conflicting alias set. This value is set in a
1105 language-dependent manner in the front-end, and should not be
1106 altered in the back-end. These set numbers are tested with
1107 alias_sets_conflict_p. */
1108 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1109
1110 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1111 refer to part of a DECL. It may also be a COMPONENT_REF. */
1112 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1113
1114 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1115 RTX that is always a CONST_INT. */
1116 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1117
1118 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1119 is always a CONST_INT. */
1120 #define MEM_SIZE(RTX) \
1121 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1122 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1123 : 0)
1124
1125 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1126 mode as a default when STRICT_ALIGNMENT, but not if not. */
1127 #define MEM_ALIGN(RTX) \
1128 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1129 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1130 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1131
1132 /* For a REG rtx, the decl it is known to refer to, if it is known to
1133 refer to part of a DECL. */
1134 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1135
1136 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a
1137 RTX that is always a CONST_INT. */
1138 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1139
1140 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1141 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1142 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1143 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1144 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1145 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1146 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1147 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1148 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1149
1150 /* 1 if RTX is a label_ref to a label outside the loop containing the
1151 reference. */
1152 #define LABEL_OUTSIDE_LOOP_P(RTX) \
1153 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct)
1154
1155 /* 1 if RTX is a label_ref for a nonlocal label. */
1156 /* Likewise in an expr_list for a reg_label note. */
1157 #define LABEL_REF_NONLOCAL_P(RTX) \
1158 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \
1159 REG_LABEL)->volatil)
1160
1161 /* 1 if RTX is a code_label that should always be considered to be needed. */
1162 #define LABEL_PRESERVE_P(RTX) \
1163 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1164
1165 /* 1 if RTX is a reg that is used only in an exit test of a loop. */
1166 #define REG_LOOP_TEST_P(RTX) \
1167 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct)
1168
1169 /* During sched, 1 if RTX is an insn that must be scheduled together
1170 with the preceding insn. */
1171 #define SCHED_GROUP_P(RTX) \
1172 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \
1173 )->in_struct)
1174
1175 /* For a SET rtx, SET_DEST is the place that is set
1176 and SET_SRC is the value it is set to. */
1177 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1178 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1179 #define SET_IS_RETURN_P(RTX) \
1180 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1181
1182 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1183 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1184 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1185
1186 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1187 conditionally executing the code on, COND_EXEC_CODE is the code
1188 to execute if the condition is true. */
1189 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1190 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1191
1192 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1193 constants pool. */
1194 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1195 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1196
1197 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1198 tree constant pool. This information is private to varasm.c. */
1199 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1200 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1201 (RTX), SYMBOL_REF)->frame_related)
1202
1203 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1204 #define SYMBOL_REF_FLAG(RTX) \
1205 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1206
1207 /* 1 if RTX is a symbol_ref that has been the library function in
1208 emit_library_call. */
1209 #define SYMBOL_REF_USED(RTX) \
1210 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1211
1212 /* 1 if RTX is a symbol_ref for a weak symbol. */
1213 #define SYMBOL_REF_WEAK(RTX) \
1214 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1215
1216 /* The tree (decl or constant) associated with the symbol, or null. */
1217 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2)
1218
1219 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1220 information derivable from the tree decl associated with this symbol.
1221 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1222 decl. In some cases this is a bug. But beyond that, it's nice to cache
1223 this information to avoid recomputing it. Finally, this allows space for
1224 the target to store more than one bit of information, as with
1225 SYMBOL_REF_FLAG. */
1226 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1227
1228 /* These flags are common enough to be defined for all targets. They
1229 are computed by the default version of targetm.encode_section_info. */
1230
1231 /* Set if this symbol is a function. */
1232 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1233 #define SYMBOL_REF_FUNCTION_P(RTX) \
1234 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1235 /* Set if targetm.binds_local_p is true. */
1236 #define SYMBOL_FLAG_LOCAL (1 << 1)
1237 #define SYMBOL_REF_LOCAL_P(RTX) \
1238 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1239 /* Set if targetm.in_small_data_p is true. */
1240 #define SYMBOL_FLAG_SMALL (1 << 2)
1241 #define SYMBOL_REF_SMALL_P(RTX) \
1242 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1243 /* The three-bit field at [5:3] is true for TLS variables; use
1244 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1245 #define SYMBOL_FLAG_TLS_SHIFT 3
1246 #define SYMBOL_REF_TLS_MODEL(RTX) \
1247 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1248 /* Set if this symbol is not defined in this translation unit. */
1249 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1250 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1251 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1252
1253 /* Subsequent bits are available for the target to use. */
1254 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7
1255 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1256
1257 /* Define a macro to look for REG_INC notes,
1258 but save time on machines where they never exist. */
1259
1260 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1261 #define FIND_REG_INC_NOTE(INSN, REG) \
1262 ((REG) != NULL_RTX && REG_P ((REG)) \
1263 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1264 : find_reg_note ((INSN), REG_INC, (REG)))
1265 #else
1266 #define FIND_REG_INC_NOTE(INSN, REG) 0
1267 #endif
1268
1269 /* Indicate whether the machine has any sort of auto increment addressing.
1270 If not, we can avoid checking for REG_INC notes. */
1271
1272 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
1273 #define AUTO_INC_DEC
1274 #endif
1275
1276 #ifndef HAVE_PRE_INCREMENT
1277 #define HAVE_PRE_INCREMENT 0
1278 #endif
1279
1280 #ifndef HAVE_PRE_DECREMENT
1281 #define HAVE_PRE_DECREMENT 0
1282 #endif
1283
1284 #ifndef HAVE_POST_INCREMENT
1285 #define HAVE_POST_INCREMENT 0
1286 #endif
1287
1288 #ifndef HAVE_POST_DECREMENT
1289 #define HAVE_POST_DECREMENT 0
1290 #endif
1291
1292 #ifndef HAVE_POST_MODIFY_DISP
1293 #define HAVE_POST_MODIFY_DISP 0
1294 #endif
1295
1296 #ifndef HAVE_POST_MODIFY_REG
1297 #define HAVE_POST_MODIFY_REG 0
1298 #endif
1299
1300 #ifndef HAVE_PRE_MODIFY_DISP
1301 #define HAVE_PRE_MODIFY_DISP 0
1302 #endif
1303
1304 #ifndef HAVE_PRE_MODIFY_REG
1305 #define HAVE_PRE_MODIFY_REG 0
1306 #endif
1307
1308
1309 /* Some architectures do not have complete pre/post increment/decrement
1310 instruction sets, or only move some modes efficiently. These macros
1311 allow us to tune autoincrement generation. */
1312
1313 #ifndef USE_LOAD_POST_INCREMENT
1314 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1315 #endif
1316
1317 #ifndef USE_LOAD_POST_DECREMENT
1318 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1319 #endif
1320
1321 #ifndef USE_LOAD_PRE_INCREMENT
1322 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1323 #endif
1324
1325 #ifndef USE_LOAD_PRE_DECREMENT
1326 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1327 #endif
1328
1329 #ifndef USE_STORE_POST_INCREMENT
1330 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1331 #endif
1332
1333 #ifndef USE_STORE_POST_DECREMENT
1334 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1335 #endif
1336
1337 #ifndef USE_STORE_PRE_INCREMENT
1338 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1339 #endif
1340
1341 #ifndef USE_STORE_PRE_DECREMENT
1342 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1343 #endif
1344 \f
1345 /* Nonzero when we are generating CONCATs. */
1346 extern int generating_concat_p;
1347
1348 /* Nonzero when we are expanding trees to RTL. */
1349 extern int currently_expanding_to_rtl;
1350
1351 /* Generally useful functions. */
1352
1353 /* In expmed.c */
1354 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1355
1356 /* In builtins.c */
1357 extern rtx expand_builtin_expect_jump (tree, rtx, rtx);
1358 extern void purge_builtin_constant_p (void);
1359
1360 /* In explow.c */
1361 extern void set_stack_check_libfunc (rtx);
1362 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1363 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1364 extern void optimize_save_area_alloca (void);
1365
1366 /* In emit-rtl.c */
1367 extern rtvec gen_rtvec (int, ...);
1368 extern rtx copy_insn_1 (rtx);
1369 extern rtx copy_insn (rtx);
1370 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1371 extern rtx emit_copy_of_insn_after (rtx, rtx);
1372 extern void set_reg_attrs_from_mem (rtx, rtx);
1373 extern void set_mem_attrs_from_reg (rtx, rtx);
1374 extern void set_reg_attrs_for_parm (rtx, rtx);
1375 extern void set_reg_pointer_align (rtx, unsigned int);
1376 extern int mem_expr_equal_p (tree, tree);
1377
1378 /* In rtl.c */
1379 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1380 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1381
1382 extern rtvec rtvec_alloc (int);
1383 extern rtx copy_rtx (rtx);
1384 extern void dump_rtx_statistics (void);
1385
1386 /* In emit-rtl.c */
1387 extern rtx copy_rtx_if_shared (rtx);
1388
1389 /* In rtl.c */
1390 extern rtx copy_most_rtx (rtx, rtx);
1391 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL);
1392 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1393 extern int rtx_equal_p (rtx, rtx);
1394
1395 /* In emit-rtl.c */
1396 extern rtvec gen_rtvec_v (int, rtx *);
1397 extern rtx gen_reg_rtx (enum machine_mode);
1398 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1399 extern rtx gen_label_rtx (void);
1400 extern int subreg_hard_regno (rtx, int);
1401 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1402
1403 /* In cse.c */
1404 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1405
1406 /* In emit-rtl.c */
1407 extern rtx gen_highpart (enum machine_mode, rtx);
1408 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1409 extern rtx gen_realpart (enum machine_mode, rtx);
1410 extern rtx gen_imagpart (enum machine_mode, rtx);
1411 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1412
1413 /* In emit-rtl.c */
1414 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1415 extern int subreg_lowpart_p (rtx);
1416 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1417 enum machine_mode);
1418 extern unsigned int subreg_highpart_offset (enum machine_mode,
1419 enum machine_mode);
1420 extern rtx make_safe_from (rtx, rtx);
1421 extern rtx convert_memory_address (enum machine_mode, rtx);
1422 extern rtx get_insns (void);
1423 extern const char *get_insn_name (int);
1424 extern rtx get_last_insn (void);
1425 extern rtx get_last_insn_anywhere (void);
1426 extern rtx get_first_nonnote_insn (void);
1427 extern rtx get_last_nonnote_insn (void);
1428 extern void start_sequence (void);
1429 extern void push_to_sequence (rtx);
1430 extern void end_sequence (void);
1431 extern void push_to_full_sequence (rtx, rtx);
1432 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1433 enum machine_mode);
1434
1435 /* In loop-iv.c */
1436
1437 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1438
1439 /* In varasm.c */
1440 extern rtx force_const_mem (enum machine_mode, rtx);
1441
1442 /* In varasm.c */
1443
1444 struct function;
1445 extern rtx get_pool_constant (rtx);
1446 extern rtx get_pool_constant_mark (rtx, bool *);
1447 extern enum machine_mode get_pool_mode (rtx);
1448 extern rtx get_pool_constant_for_function (struct function *, rtx);
1449 extern enum machine_mode get_pool_mode_for_function (struct function *, rtx);
1450 extern int get_pool_offset (rtx);
1451 extern rtx simplify_subtraction (rtx);
1452
1453 /* In function.c */
1454 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1455 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1456 extern rtx assign_stack_temp_for_type (enum machine_mode,
1457 HOST_WIDE_INT, int, tree);
1458 extern rtx assign_temp (tree, int, int, int);
1459
1460 /* In emit-rtl.c */
1461 extern rtx emit_insn_before (rtx, rtx);
1462 extern rtx emit_insn_before_noloc (rtx, rtx);
1463 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1464 extern rtx emit_jump_insn_before (rtx, rtx);
1465 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1466 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1467 extern rtx emit_call_insn_before (rtx, rtx);
1468 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1469 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1470 extern rtx emit_barrier_before (rtx);
1471 extern rtx emit_label_before (rtx, rtx);
1472 extern rtx emit_note_before (int, rtx);
1473 extern rtx emit_insn_after (rtx, rtx);
1474 extern rtx emit_insn_after_noloc (rtx, rtx);
1475 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1476 extern rtx emit_jump_insn_after (rtx, rtx);
1477 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1478 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1479 extern rtx emit_call_insn_after (rtx, rtx);
1480 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1481 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1482 extern rtx emit_barrier_after (rtx);
1483 extern rtx emit_label_after (rtx, rtx);
1484 extern rtx emit_note_after (int, rtx);
1485 extern rtx emit_note_copy_after (rtx, rtx);
1486 extern rtx emit_insn (rtx);
1487 extern rtx emit_jump_insn (rtx);
1488 extern rtx emit_call_insn (rtx);
1489 extern rtx emit_label (rtx);
1490 extern rtx emit_barrier (void);
1491 extern rtx emit_note (int);
1492 extern rtx emit_note_copy (rtx);
1493 extern rtx emit_line_note (location_t);
1494 extern rtx make_insn_raw (rtx);
1495 extern void add_function_usage_to (rtx, rtx);
1496 extern rtx last_call_insn (void);
1497 extern rtx previous_insn (rtx);
1498 extern rtx next_insn (rtx);
1499 extern rtx prev_nonnote_insn (rtx);
1500 extern rtx next_nonnote_insn (rtx);
1501 extern rtx prev_real_insn (rtx);
1502 extern rtx next_real_insn (rtx);
1503 extern rtx prev_active_insn (rtx);
1504 extern rtx next_active_insn (rtx);
1505 extern int active_insn_p (rtx);
1506 extern rtx prev_label (rtx);
1507 extern rtx next_label (rtx);
1508 extern rtx skip_consecutive_labels (rtx);
1509 extern rtx next_cc0_user (rtx);
1510 extern rtx prev_cc0_setter (rtx);
1511
1512 /* In cfglayout.c */
1513 extern tree choose_inner_scope (tree, tree);
1514 extern int insn_line (rtx);
1515 extern const char * insn_file (rtx);
1516 extern int locator_line (int);
1517 extern const char * locator_file (int);
1518 extern int prologue_locator, epilogue_locator;
1519
1520 /* In jump.c */
1521 extern enum rtx_code reverse_condition (enum rtx_code);
1522 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1523 extern enum rtx_code swap_condition (enum rtx_code);
1524 extern enum rtx_code unsigned_condition (enum rtx_code);
1525 extern enum rtx_code signed_condition (enum rtx_code);
1526 extern void mark_jump_label (rtx, rtx, int);
1527 extern void cleanup_barriers (void);
1528
1529 /* In jump.c */
1530 extern bool squeeze_notes (rtx *, rtx *);
1531 extern rtx delete_related_insns (rtx);
1532 extern void delete_jump (rtx);
1533 extern void delete_barrier (rtx);
1534 extern rtx get_label_before (rtx);
1535 extern rtx get_label_after (rtx);
1536 extern rtx follow_jumps (rtx);
1537
1538 /* In recog.c */
1539 extern rtx *find_constant_term_loc (rtx *);
1540
1541 /* In emit-rtl.c */
1542 extern rtx try_split (rtx, rtx, int);
1543 extern int split_branch_probability;
1544
1545 /* In unknown file */
1546 extern rtx split_insns (rtx, rtx);
1547
1548 /* In simplify-rtx.c */
1549 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1550 enum machine_mode);
1551 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1552 rtx);
1553 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1554 enum machine_mode, rtx, rtx, rtx);
1555 extern rtx simplify_const_relational_operation (enum rtx_code,
1556 enum machine_mode, rtx, rtx);
1557 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1558 enum machine_mode, rtx, rtx);
1559 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1560 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1561 enum machine_mode);
1562 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1563 enum machine_mode, rtx, rtx, rtx);
1564 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1565 enum machine_mode, rtx, rtx);
1566 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1567 unsigned int);
1568 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1569 unsigned int);
1570 extern rtx simplify_replace_rtx (rtx, rtx, rtx);
1571 extern rtx simplify_rtx (rtx);
1572 extern rtx avoid_constant_pool_reference (rtx);
1573
1574 /* In regclass.c */
1575 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1576 bool);
1577
1578 /* In emit-rtl.c */
1579 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1580
1581 /* Functions in rtlanal.c */
1582
1583 /* Single set is implemented as macro for performance reasons. */
1584 #define single_set(I) (INSN_P (I) \
1585 ? (GET_CODE (PATTERN (I)) == SET \
1586 ? PATTERN (I) : single_set_1 (I)) \
1587 : NULL_RTX)
1588 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1589
1590 /* Structure used for passing data to REPLACE_LABEL. */
1591 typedef struct replace_label_data
1592 {
1593 rtx r1;
1594 rtx r2;
1595 bool update_label_nuses;
1596 } replace_label_data;
1597
1598 extern int rtx_addr_can_trap_p (rtx);
1599 extern bool nonzero_address_p (rtx);
1600 extern int rtx_unstable_p (rtx);
1601 extern int rtx_varies_p (rtx, int);
1602 extern int rtx_addr_varies_p (rtx, int);
1603 extern HOST_WIDE_INT get_integer_term (rtx);
1604 extern rtx get_related_value (rtx);
1605 extern int global_reg_mentioned_p (rtx);
1606 extern int reg_mentioned_p (rtx, rtx);
1607 extern int count_occurrences (rtx, rtx, int);
1608 extern int reg_referenced_p (rtx, rtx);
1609 extern int reg_used_between_p (rtx, rtx, rtx);
1610 extern int reg_referenced_between_p (rtx, rtx, rtx);
1611 extern int reg_set_between_p (rtx, rtx, rtx);
1612 extern int regs_set_between_p (rtx, rtx, rtx);
1613 extern int commutative_operand_precedence (rtx);
1614 extern int swap_commutative_operands_p (rtx, rtx);
1615 extern int modified_between_p (rtx, rtx, rtx);
1616 extern int no_labels_between_p (rtx, rtx);
1617 extern int no_jumps_between_p (rtx, rtx);
1618 extern int modified_in_p (rtx, rtx);
1619 extern int insn_dependent_p (rtx, rtx);
1620 extern int reg_set_p (rtx, rtx);
1621 extern rtx single_set_2 (rtx, rtx);
1622 extern int multiple_sets (rtx);
1623 extern int set_noop_p (rtx);
1624 extern int noop_move_p (rtx);
1625 extern rtx find_last_value (rtx, rtx *, rtx, int);
1626 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *);
1627 extern int reg_overlap_mentioned_p (rtx, rtx);
1628 extern rtx set_of (rtx, rtx);
1629 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *);
1630 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1631 extern int dead_or_set_p (rtx, rtx);
1632 extern int dead_or_set_regno_p (rtx, unsigned int);
1633 extern rtx find_reg_note (rtx, enum reg_note, rtx);
1634 extern rtx find_regno_note (rtx, enum reg_note, unsigned int);
1635 extern rtx find_reg_equal_equiv_note (rtx);
1636 extern int find_reg_fusage (rtx, enum rtx_code, rtx);
1637 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int);
1638 extern int pure_call_p (rtx);
1639 extern void remove_note (rtx, rtx);
1640 extern int side_effects_p (rtx);
1641 extern int volatile_refs_p (rtx);
1642 extern int volatile_insn_p (rtx);
1643 extern int may_trap_p (rtx);
1644 extern int inequality_comparisons_p (rtx);
1645 extern rtx replace_rtx (rtx, rtx, rtx);
1646 extern rtx replace_regs (rtx, rtx *, unsigned int, int);
1647 extern int replace_label (rtx *, void *);
1648 extern int rtx_referenced_p (rtx, rtx);
1649 extern bool tablejump_p (rtx, rtx *, rtx *);
1650 extern int computed_jump_p (rtx);
1651 typedef int (*rtx_function) (rtx *, void *);
1652 extern int for_each_rtx (rtx *, rtx_function, void *);
1653 extern rtx regno_use_in (unsigned int, rtx);
1654 extern int auto_inc_p (rtx);
1655 extern int in_expr_list_p (rtx, rtx);
1656 extern void remove_node_from_expr_list (rtx, rtx *);
1657 extern int insns_safe_to_move_p (rtx, rtx, rtx *);
1658 extern int loc_mentioned_in_p (rtx *, rtx);
1659 extern rtx find_first_parameter_load (rtx, rtx);
1660 extern bool keep_with_call_p (rtx);
1661 extern bool label_is_jump_target_p (rtx, rtx);
1662 extern int insn_rtx_cost (rtx);
1663
1664 /* flow.c */
1665
1666 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT);
1667
1668 /* lists.c */
1669
1670 void free_EXPR_LIST_list (rtx *);
1671 void free_INSN_LIST_list (rtx *);
1672 void free_EXPR_LIST_node (rtx);
1673 void free_INSN_LIST_node (rtx);
1674 rtx alloc_INSN_LIST (rtx, rtx);
1675 rtx alloc_EXPR_LIST (int, rtx, rtx);
1676
1677 /* regclass.c */
1678
1679 /* Maximum number of parallel sets and clobbers in any insn in this fn.
1680 Always at least 3, since the combiner could put that many together
1681 and we want this to remain correct for all the remaining passes. */
1682
1683 extern int max_parallel;
1684
1685 /* Free up register info memory. */
1686 extern void free_reg_info (void);
1687
1688 /* recog.c */
1689 extern int asm_noperands (rtx);
1690 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1691 enum machine_mode *);
1692
1693 extern enum reg_class reg_preferred_class (int);
1694 extern enum reg_class reg_alternate_class (int);
1695
1696 extern void split_all_insns (int);
1697 extern void split_all_insns_noflow (void);
1698
1699 #define MAX_SAVED_CONST_INT 64
1700 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1701
1702 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1703 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1704 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1705 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1706 extern GTY(()) rtx const_true_rtx;
1707
1708 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1709
1710 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1711 same as VOIDmode. */
1712
1713 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1714
1715 /* Likewise, for the constants 1 and 2. */
1716
1717 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1718 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1719
1720 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1721 is used to represent the frame pointer. This is because the
1722 hard frame pointer and the automatic variables are separated by an amount
1723 that cannot be determined until after register allocation. We can assume
1724 that in this case ELIMINABLE_REGS will be defined, one action of which
1725 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1726 #ifndef HARD_FRAME_POINTER_REGNUM
1727 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1728 #endif
1729
1730 /* Index labels for global_rtl. */
1731 enum global_rtl_index
1732 {
1733 GR_PC,
1734 GR_CC0,
1735 GR_STACK_POINTER,
1736 GR_FRAME_POINTER,
1737 /* For register elimination to work properly these hard_frame_pointer_rtx,
1738 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
1739 the same register. */
1740 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1741 GR_ARG_POINTER = GR_FRAME_POINTER,
1742 #endif
1743 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
1744 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
1745 #else
1746 GR_HARD_FRAME_POINTER,
1747 #endif
1748 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
1749 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
1750 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
1751 #else
1752 GR_ARG_POINTER,
1753 #endif
1754 #endif
1755 GR_VIRTUAL_INCOMING_ARGS,
1756 GR_VIRTUAL_STACK_ARGS,
1757 GR_VIRTUAL_STACK_DYNAMIC,
1758 GR_VIRTUAL_OUTGOING_ARGS,
1759 GR_VIRTUAL_CFA,
1760
1761 GR_MAX
1762 };
1763
1764 /* Pointers to standard pieces of rtx are stored here. */
1765 extern GTY(()) rtx global_rtl[GR_MAX];
1766
1767 /* Standard pieces of rtx, to be substituted directly into things. */
1768 #define pc_rtx (global_rtl[GR_PC])
1769 #define cc0_rtx (global_rtl[GR_CC0])
1770
1771 /* All references to certain hard regs, except those created
1772 by allocating pseudo regs into them (when that's possible),
1773 go through these unique rtx objects. */
1774 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
1775 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
1776 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
1777 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
1778
1779 extern GTY(()) rtx pic_offset_table_rtx;
1780 extern GTY(()) rtx static_chain_rtx;
1781 extern GTY(()) rtx static_chain_incoming_rtx;
1782 extern GTY(()) rtx return_address_pointer_rtx;
1783
1784 /* Include the RTL generation functions. */
1785
1786 #ifndef GENERATOR_FILE
1787 #include "genrtl.h"
1788 #ifndef USE_MAPPED_LOCATION
1789 #undef gen_rtx_ASM_OPERANDS
1790 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \
1791 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line)
1792 #endif
1793 #endif
1794
1795 /* There are some RTL codes that require special attention; the
1796 generation functions included above do the raw handling. If you
1797 add to this list, modify special_rtx in gengenrtl.c as well. */
1798
1799 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
1800 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
1801 extern rtx gen_raw_REG (enum machine_mode, int);
1802 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
1803 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
1804 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
1805
1806 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
1807
1808 /* Virtual registers are used during RTL generation to refer to locations into
1809 the stack frame when the actual location isn't known until RTL generation
1810 is complete. The routine instantiate_virtual_regs replaces these with
1811 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
1812 a constant. */
1813
1814 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
1815
1816 /* This points to the first word of the incoming arguments passed on the stack,
1817 either by the caller or by the callee when pretending it was passed by the
1818 caller. */
1819
1820 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
1821
1822 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
1823
1824 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
1825 variable on the stack. Otherwise, it points to the first variable on
1826 the stack. */
1827
1828 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
1829
1830 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
1831
1832 /* This points to the location of dynamically-allocated memory on the stack
1833 immediately after the stack pointer has been adjusted by the amount
1834 desired. */
1835
1836 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
1837
1838 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
1839
1840 /* This points to the location in the stack at which outgoing arguments should
1841 be written when the stack is pre-pushed (arguments pushed using push
1842 insns always use sp). */
1843
1844 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
1845
1846 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
1847
1848 /* This points to the Canonical Frame Address of the function. This
1849 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
1850 but is calculated relative to the arg pointer for simplicity; the
1851 frame pointer nor stack pointer are necessarily fixed relative to
1852 the CFA until after reload. */
1853
1854 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
1855
1856 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
1857
1858 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
1859
1860 /* Nonzero if REGNUM is a pointer into the stack frame. */
1861 #define REGNO_PTR_FRAME_P(REGNUM) \
1862 ((REGNUM) == STACK_POINTER_REGNUM \
1863 || (REGNUM) == FRAME_POINTER_REGNUM \
1864 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
1865 || (REGNUM) == ARG_POINTER_REGNUM \
1866 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
1867 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
1868
1869 /* REGNUM never really appearing in the INSN stream. */
1870 #define INVALID_REGNUM (~(unsigned int) 0)
1871
1872 extern rtx output_constant_def (tree, int);
1873 extern rtx lookup_constant_def (tree);
1874
1875 /* Nonzero after the second flow pass has completed.
1876 Set to 1 or 0 by toplev.c */
1877 extern int flow2_completed;
1878
1879 /* Nonzero after end of reload pass.
1880 Set to 1 or 0 by reload1.c. */
1881
1882 extern int reload_completed;
1883
1884 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
1885 extern int epilogue_completed;
1886
1887 /* Set to 1 while reload_as_needed is operating.
1888 Required by some machines to handle any generated moves differently. */
1889
1890 extern int reload_in_progress;
1891
1892 /* If this is nonzero, we do not bother generating VOLATILE
1893 around volatile memory references, and we are willing to
1894 output indirect addresses. If cse is to follow, we reject
1895 indirect addresses so a useful potential cse is generated;
1896 if it is used only once, instruction combination will produce
1897 the same indirect address eventually. */
1898 extern int cse_not_expected;
1899
1900 /* Set to nonzero before life analysis to indicate that it is unsafe to
1901 generate any new pseudo registers. */
1902 extern int no_new_pseudos;
1903
1904 /* Translates rtx code to tree code, for those codes needed by
1905 REAL_ARITHMETIC. The function returns an int because the caller may not
1906 know what `enum tree_code' means. */
1907
1908 extern int rtx_to_tree_code (enum rtx_code);
1909
1910 /* In cse.c */
1911 extern int delete_trivially_dead_insns (rtx, int);
1912 extern int cse_main (rtx, int, FILE *);
1913 extern void cse_condition_code_reg (void);
1914 extern int exp_equiv_p (rtx, rtx, int, bool);
1915 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool);
1916
1917 /* In jump.c */
1918 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
1919 extern int condjump_p (rtx);
1920 extern int any_condjump_p (rtx);
1921 extern int any_uncondjump_p (rtx);
1922 extern int safe_to_remove_jump_p (rtx);
1923 extern rtx pc_set (rtx);
1924 extern rtx condjump_label (rtx);
1925 extern int simplejump_p (rtx);
1926 extern int returnjump_p (rtx);
1927 extern int onlyjump_p (rtx);
1928 extern int only_sets_cc0_p (rtx);
1929 extern int sets_cc0_p (rtx);
1930 extern int invert_jump_1 (rtx, rtx);
1931 extern int invert_jump (rtx, rtx, int);
1932 extern int rtx_renumbered_equal_p (rtx, rtx);
1933 extern int true_regnum (rtx);
1934 extern unsigned int reg_or_subregno (rtx);
1935 extern int redirect_jump_1 (rtx, rtx);
1936 extern int redirect_jump (rtx, rtx, int);
1937 extern void rebuild_jump_labels (rtx);
1938 extern enum rtx_code reversed_comparison_code (rtx, rtx);
1939 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code,
1940 rtx, rtx, rtx);
1941 extern void delete_for_peephole (rtx, rtx);
1942 extern int condjump_in_parallel_p (rtx);
1943 extern void purge_line_number_notes (rtx);
1944
1945 /* In emit-rtl.c. */
1946 extern int max_reg_num (void);
1947 extern int max_label_num (void);
1948 extern int get_first_label_num (void);
1949 extern void maybe_set_first_label_num (rtx);
1950 extern void delete_insns_since (rtx);
1951 extern void mark_reg_pointer (rtx, int);
1952 extern void mark_user_reg (rtx);
1953 extern void reset_used_flags (rtx);
1954 extern void set_used_flags (rtx);
1955 extern void reorder_insns (rtx, rtx, rtx);
1956 extern void reorder_insns_nobb (rtx, rtx, rtx);
1957 extern int get_max_uid (void);
1958 extern int in_sequence_p (void);
1959 extern void force_next_line_note (void);
1960 extern void init_emit (void);
1961 extern void init_emit_once (int);
1962 extern void push_topmost_sequence (void);
1963 extern void pop_topmost_sequence (void);
1964 extern void reverse_comparison (rtx);
1965 extern void set_new_first_and_last_insn (rtx, rtx);
1966 extern void set_new_last_label_num (int);
1967 extern void unshare_all_rtl (void);
1968 extern void unshare_all_rtl_again (rtx);
1969 extern void unshare_all_rtl_in_chain (rtx);
1970 extern void verify_rtl_sharing (void);
1971 extern void set_first_insn (rtx);
1972 extern void set_last_insn (rtx);
1973 extern void link_cc0_insns (rtx);
1974 extern void add_insn (rtx);
1975 extern void add_insn_before (rtx, rtx);
1976 extern void add_insn_after (rtx, rtx);
1977 extern void remove_insn (rtx);
1978 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx);
1979 extern enum rtx_code classify_insn (rtx);
1980 extern rtx emit (rtx);
1981 extern void renumber_insns (FILE *);
1982 extern void remove_unnecessary_notes (void);
1983 extern rtx delete_insn (rtx);
1984 extern rtx entry_of_function (void);
1985 extern void delete_insn_chain (rtx, rtx);
1986 extern rtx unlink_insn_chain (rtx, rtx);
1987 extern rtx delete_insn_and_edges (rtx);
1988 extern void delete_insn_chain_and_edges (rtx, rtx);
1989 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
1990 extern rtx gen_const_mem (enum machine_mode, rtx);
1991
1992 /* In combine.c */
1993 extern int combine_instructions (rtx, unsigned int);
1994 extern unsigned int extended_count (rtx, enum machine_mode, int);
1995 extern rtx remove_death (unsigned int, rtx);
1996 extern void dump_combine_stats (FILE *);
1997 extern void dump_combine_total_stats (FILE *);
1998 /* In web.c */
1999 extern void web_main (void);
2000
2001 /* In sched-rgn.c. */
2002 extern void schedule_insns (FILE *);
2003
2004 /* In sched-ebb.c. */
2005 extern void schedule_ebbs (FILE *);
2006
2007 /* In haifa-sched.c. */
2008 extern void fix_sched_param (const char *, const char *);
2009
2010 /* In print-rtl.c */
2011 extern const char *print_rtx_head;
2012 extern void debug_rtx (rtx);
2013 extern void debug_rtx_list (rtx, int);
2014 extern void debug_rtx_range (rtx, rtx);
2015 extern rtx debug_rtx_find (rtx, int);
2016 extern void print_mem_expr (FILE *, tree);
2017 extern void print_rtl (FILE *, rtx);
2018 extern void print_simple_rtl (FILE *, rtx);
2019 extern int print_rtl_single (FILE *, rtx);
2020 extern void print_inline_rtx (FILE *, rtx, int);
2021
2022 /* In loop.c */
2023 extern void init_loop (void);
2024 extern void loop_optimize (rtx, FILE *, int);
2025 extern void branch_target_load_optimize (bool);
2026
2027 /* In function.c */
2028 extern void reposition_prologue_and_epilogue_notes (rtx);
2029 extern void thread_prologue_and_epilogue_insns (rtx);
2030 extern int prologue_epilogue_contains (rtx);
2031 extern int sibcall_epilogue_contains (rtx);
2032 extern void mark_temp_addr_taken (rtx);
2033 extern void update_temp_slot_address (rtx, rtx);
2034
2035 /* In stmt.c */
2036 extern void expand_null_return (void);
2037 extern void expand_naked_return (void);
2038 extern void emit_jump (rtx);
2039
2040 /* In expr.c */
2041 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2042 unsigned int, int);
2043
2044 /* In flow.c */
2045 extern void recompute_reg_usage (rtx, int);
2046 extern int initialize_uninitialized_subregs (void);
2047 extern void delete_dead_jumptables (void);
2048 extern void print_rtl_with_bb (FILE *, rtx);
2049 extern void dump_flow_info (FILE *);
2050
2051 /* In expmed.c */
2052 extern void init_expmed (void);
2053 extern void expand_inc (rtx, rtx);
2054 extern void expand_dec (rtx, rtx);
2055 extern rtx expand_mult_highpart (enum machine_mode, rtx,
2056 unsigned HOST_WIDE_INT, rtx, int, int);
2057
2058 /* In gcse.c */
2059 extern bool can_copy_p (enum machine_mode);
2060 extern rtx fis_get_condition (rtx);
2061 extern int gcse_main (rtx, FILE *);
2062 extern int bypass_jumps (FILE *);
2063
2064 /* In postreload-gcse.c */
2065 extern void gcse_after_reload_main (rtx);
2066
2067 /* In global.c */
2068 extern void mark_elimination (int, int);
2069 extern int global_alloc (FILE *);
2070 extern void dump_global_regs (FILE *);
2071 #ifdef HARD_CONST
2072 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */
2073 extern void retry_global_alloc (int, HARD_REG_SET);
2074 #endif
2075 extern void build_insn_chain (rtx);
2076
2077 /* In regclass.c */
2078 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2079 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2080 extern void globalize_reg (int);
2081 extern void init_reg_modes_once (void);
2082 extern void init_regs (void);
2083 extern void init_fake_stack_mems (void);
2084 extern void init_reg_sets (void);
2085 extern void regset_release_memory (void);
2086 extern void regclass_init (void);
2087 extern void regclass (rtx, int, FILE *);
2088 extern void reg_scan (rtx, unsigned int, int);
2089 extern void reg_scan_update (rtx, rtx, unsigned int);
2090 extern void fix_register (const char *, int, int);
2091 extern void init_subregs_of_mode (void);
2092 extern void record_subregs_of_mode (rtx);
2093 #ifdef HARD_CONST
2094 extern void cannot_change_mode_set_regs (HARD_REG_SET *,
2095 enum machine_mode, unsigned int);
2096 #endif
2097 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2098 enum machine_mode);
2099
2100 /* In regmove.c */
2101 extern void regmove_optimize (rtx, int, FILE *);
2102 extern void combine_stack_adjustments (void);
2103
2104 /* In reorg.c */
2105 extern void dbr_schedule (rtx, FILE *);
2106
2107 /* In local-alloc.c */
2108 extern void dump_local_alloc (FILE *);
2109 extern int local_alloc (void);
2110
2111 /* In reg-stack.c */
2112 extern bool reg_to_stack (FILE *);
2113
2114 /* In calls.c */
2115 enum libcall_type
2116 {
2117 LCT_NORMAL = 0,
2118 LCT_CONST = 1,
2119 LCT_PURE = 2,
2120 LCT_CONST_MAKE_BLOCK = 3,
2121 LCT_PURE_MAKE_BLOCK = 4,
2122 LCT_NORETURN = 5,
2123 LCT_THROW = 6,
2124 LCT_ALWAYS_RETURN = 7,
2125 LCT_RETURNS_TWICE = 8
2126 };
2127
2128 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2129 ...);
2130 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2131 enum machine_mode, int, ...);
2132
2133 /* In unroll.c */
2134 extern int set_dominates_use (int, int, int, rtx, rtx);
2135
2136 /* In varasm.c */
2137 extern int in_data_section (void);
2138 extern void init_varasm_once (void);
2139
2140 /* In rtl.c */
2141 extern void init_rtl (void);
2142 extern void traverse_md_constants (int (*) (void **, void *), void *);
2143 struct md_constant { char *name, *value; };
2144
2145 /* In read-rtl.c */
2146 extern int read_skip_spaces (FILE *);
2147 extern bool read_rtx (FILE *, rtx *, int *);
2148 extern const char *read_rtx_filename;
2149 extern int read_rtx_lineno;
2150
2151 /* In alias.c */
2152 extern void clear_reg_alias_info (rtx);
2153 extern rtx canon_rtx (rtx);
2154 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int));
2155 extern rtx get_addr (rtx);
2156 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
2157 int (*)(rtx, int));
2158 extern int read_dependence (rtx, rtx);
2159 extern int anti_dependence (rtx, rtx);
2160 extern int output_dependence (rtx, rtx);
2161 extern void mark_constant_function (void);
2162 extern void init_alias_once (void);
2163 extern void init_alias_analysis (void);
2164 extern void end_alias_analysis (void);
2165 extern rtx addr_side_effect_eval (rtx, int, int);
2166 extern bool memory_modified_in_insn_p (rtx, rtx);
2167 extern rtx find_base_term (rtx);
2168 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2169 extern rtx get_reg_known_value (unsigned int);
2170 extern bool get_reg_known_equiv_p (unsigned int);
2171
2172 #ifdef STACK_REGS
2173 extern int stack_regs_mentioned (rtx insn);
2174 #endif
2175
2176 /* In toplev.c */
2177 extern GTY(()) rtx stack_limit_rtx;
2178
2179 /* In regrename.c */
2180 extern void regrename_optimize (void);
2181 extern void copyprop_hardreg_forward (void);
2182
2183 /* In ifcvt.c */
2184 extern void if_convert (int);
2185
2186 /* In predict.c */
2187 extern void invert_br_probabilities (rtx);
2188 extern bool expensive_function_p (int);
2189 /* In tracer.c */
2190 extern void tracer (unsigned int);
2191
2192 /* In var-tracking.c */
2193 extern void variable_tracking_main (void);
2194
2195 /* In stor-layout.c. */
2196 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2197 rtx *, rtx *);
2198
2199 /* In loop-unswitch.c */
2200 extern rtx reversed_condition (rtx);
2201 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2202
2203 /* In loop-iv.c */
2204 extern rtx canon_condition (rtx);
2205 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2206
2207 /* In ra.c. */
2208 extern void reg_alloc (void);
2209
2210 /* In modulo-sched.c. */
2211 extern void sms_schedule (FILE *);
2212 \f
2213 struct rtl_hooks
2214 {
2215 rtx (*gen_lowpart) (enum machine_mode, rtx);
2216 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode,
2217 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2218 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode,
2219 unsigned int, unsigned int *);
2220
2221 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */
2222 };
2223
2224 /* Each pass can provide its own. */
2225 extern struct rtl_hooks rtl_hooks;
2226
2227 /* ... but then it has to restore these. */
2228 extern const struct rtl_hooks general_rtl_hooks;
2229
2230 /* Keep this for the nonce. */
2231 #define gen_lowpart rtl_hooks.gen_lowpart
2232
2233 #endif /* ! GCC_RTL_H */
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