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* config/mips/mips-dsp.md (add<DSPV:mode>3,
[official-gcc.git] / gcc / rtl.h
bloba3e05798d55ec38c705c442653d52bfcf9d15ae6
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #ifndef GCC_RTL_H
23 #define GCC_RTL_H
24
25 #include "statistics.h"
26 #include "machmode.h"
27 #include "input.h"
28 #include "real.h"
29 #include "vec.h"
30 #include "vecir.h"
31 #include "fixed-value.h"
32 #include "alias.h"
33
34 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
35 #undef FLOAT /* Likewise. */
36 #undef ABS /* Likewise. */
37 #undef PC /* Likewise. */
38
39 /* Value used by some passes to "recognize" noop moves as valid
40 instructions. */
41 #define NOOP_MOVE_INSN_CODE INT_MAX
42
43 /* Register Transfer Language EXPRESSIONS CODES */
44
45 #define RTX_CODE enum rtx_code
46 enum rtx_code {
47
48 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
49 #include "rtl.def" /* rtl expressions are documented here */
50 #undef DEF_RTL_EXPR
51
52 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
53 NUM_RTX_CODE.
54 Assumes default enum value assignment. */
55
56 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
57 /* The cast here, saves many elsewhere. */
58
59 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
60
61 enum rtx_class {
62 /* We check bit 0-1 of some rtx class codes in the predicates below. */
63
64 /* Bit 0 = comparison if 0, arithmetic is 1
65 Bit 1 = 1 if commutative. */
66 RTX_COMPARE, /* 0 */
67 RTX_COMM_COMPARE,
68 RTX_BIN_ARITH,
69 RTX_COMM_ARITH,
70
71 /* Must follow the four preceding values. */
72 RTX_UNARY, /* 4 */
73
74 RTX_EXTRA,
75 RTX_MATCH,
76 RTX_INSN,
77
78 /* Bit 0 = 1 if constant. */
79 RTX_OBJ, /* 8 */
80 RTX_CONST_OBJ,
81
82 RTX_TERNARY,
83 RTX_BITFIELD_OPS,
84 RTX_AUTOINC
85 };
86
87 #define RTX_OBJ_MASK (~1)
88 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
89 #define RTX_COMPARE_MASK (~1)
90 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
91 #define RTX_ARITHMETIC_MASK (~1)
92 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
93 #define RTX_BINARY_MASK (~3)
94 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
95 #define RTX_COMMUTATIVE_MASK (~2)
96 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
97 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
98
99 extern const unsigned char rtx_length[NUM_RTX_CODE];
100 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
101
102 extern const char * const rtx_name[NUM_RTX_CODE];
103 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
104
105 extern const char * const rtx_format[NUM_RTX_CODE];
106 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
107
108 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
109 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
110
111 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
112 extern const unsigned char rtx_next[NUM_RTX_CODE];
113 \f
114 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
115 relative to which the offsets are calculated, as explained in rtl.def. */
116 typedef struct
117 {
118 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
119 unsigned min_align: 8;
120 /* Flags: */
121 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
122 unsigned min_after_vec: 1; /* minimum address target label is
123 after the ADDR_DIFF_VEC. */
124 unsigned max_after_vec: 1; /* maximum address target label is
125 after the ADDR_DIFF_VEC. */
126 unsigned min_after_base: 1; /* minimum address target label is
127 after BASE. */
128 unsigned max_after_base: 1; /* maximum address target label is
129 after BASE. */
130 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
131 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
132 unsigned : 2;
133 unsigned scale : 8;
134 } addr_diff_vec_flags;
135
136 /* Structure used to describe the attributes of a MEM. These are hashed
137 so MEMs that the same attributes share a data structure. This means
138 they cannot be modified in place. If any element is nonzero, it means
139 the value of the corresponding attribute is unknown. */
140 /* ALIGN and SIZE are the alignment and size of the MEM itself,
141 while EXPR can describe a larger underlying object, which might have a
142 stricter alignment; OFFSET is the offset of the MEM within that object. */
143 typedef struct GTY(()) mem_attrs
144 {
145 tree expr; /* expr corresponding to MEM. */
146 rtx offset; /* Offset from start of DECL, as CONST_INT. */
147 rtx size; /* Size in bytes, as a CONST_INT. */
148 alias_set_type alias; /* Memory alias set. */
149 unsigned int align; /* Alignment of MEM in bits. */
150 unsigned char addrspace; /* Address space (0 for generic). */
151 } mem_attrs;
152
153 /* Structure used to describe the attributes of a REG in similar way as
154 mem_attrs does for MEM above. Note that the OFFSET field is calculated
155 in the same way as for mem_attrs, rather than in the same way as a
156 SUBREG_BYTE. For example, if a big-endian target stores a byte
157 object in the low part of a 4-byte register, the OFFSET field
158 will be -3 rather than 0. */
159
160 typedef struct GTY(()) reg_attrs {
161 tree decl; /* decl corresponding to REG. */
162 HOST_WIDE_INT offset; /* Offset from start of DECL. */
163 } reg_attrs;
164
165 /* Common union for an element of an rtx. */
166
167 union rtunion_def
168 {
169 int rt_int;
170 unsigned int rt_uint;
171 const char *rt_str;
172 rtx rt_rtx;
173 rtvec rt_rtvec;
174 enum machine_mode rt_type;
175 addr_diff_vec_flags rt_addr_diff_vec_flags;
176 struct cselib_val_struct *rt_cselib;
177 struct bitmap_head_def *rt_bit;
178 tree rt_tree;
179 struct basic_block_def *rt_bb;
180 mem_attrs *rt_mem;
181 reg_attrs *rt_reg;
182 struct constant_descriptor_rtx *rt_constant;
183 };
184 typedef union rtunion_def rtunion;
185
186 /* This structure remembers the position of a SYMBOL_REF within an
187 object_block structure. A SYMBOL_REF only provides this information
188 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
189 struct GTY(()) block_symbol {
190 /* The usual SYMBOL_REF fields. */
191 rtunion GTY ((skip)) fld[3];
192
193 /* The block that contains this object. */
194 struct object_block *block;
195
196 /* The offset of this object from the start of its block. It is negative
197 if the symbol has not yet been assigned an offset. */
198 HOST_WIDE_INT offset;
199 };
200
201 /* Describes a group of objects that are to be placed together in such
202 a way that their relative positions are known. */
203 struct GTY(()) object_block {
204 /* The section in which these objects should be placed. */
205 section *sect;
206
207 /* The alignment of the first object, measured in bits. */
208 unsigned int alignment;
209
210 /* The total size of the objects, measured in bytes. */
211 HOST_WIDE_INT size;
212
213 /* The SYMBOL_REFs for each object. The vector is sorted in
214 order of increasing offset and the following conditions will
215 hold for each element X:
216
217 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
218 !SYMBOL_REF_ANCHOR_P (X)
219 SYMBOL_REF_BLOCK (X) == [address of this structure]
220 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
221 VEC(rtx,gc) *objects;
222
223 /* All the anchor SYMBOL_REFs used to address these objects, sorted
224 in order of increasing offset, and then increasing TLS model.
225 The following conditions will hold for each element X in this vector:
226
227 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
228 SYMBOL_REF_ANCHOR_P (X)
229 SYMBOL_REF_BLOCK (X) == [address of this structure]
230 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
231 VEC(rtx,gc) *anchors;
232 };
233
234 /* RTL expression ("rtx"). */
235
236 struct GTY((chain_next ("RTX_NEXT (&%h)"),
237 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
238 /* The kind of expression this is. */
239 ENUM_BITFIELD(rtx_code) code: 16;
240
241 /* The kind of value the expression has. */
242 ENUM_BITFIELD(machine_mode) mode : 8;
243
244 /* 1 in a MEM if we should keep the alias set for this mem unchanged
245 when we access a component.
246 1 in a CALL_INSN if it is a sibling call.
247 1 in a SET that is for a return.
248 In a CODE_LABEL, part of the two-bit alternate entry field. */
249 unsigned int jump : 1;
250 /* In a CODE_LABEL, part of the two-bit alternate entry field.
251 1 in a MEM if it cannot trap.
252 1 in a CALL_INSN logically equivalent to
253 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
254 unsigned int call : 1;
255 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
256 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
257 1 in a SYMBOL_REF if it addresses something in the per-function
258 constants pool.
259 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
260 1 in a NOTE, or EXPR_LIST for a const call.
261 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */
262 unsigned int unchanging : 1;
263 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
264 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
265 if it has been deleted.
266 1 in a REG expression if corresponds to a variable declared by the user,
267 0 for an internally generated temporary.
268 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
269 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
270 non-local label.
271 In a SYMBOL_REF, this flag is used for machine-specific purposes.
272 In a PREFETCH, this flag indicates that it should be considered a scheduling
273 barrier. */
274 unsigned int volatil : 1;
275 /* 1 in a MEM referring to a field of an aggregate.
276 0 if the MEM was a variable or the result of a * operator in C;
277 1 if it was the result of a . or -> operator (on a struct) in C.
278 1 in a REG if the register is used only in exit code a loop.
279 1 in a SUBREG expression if was generated from a variable with a
280 promoted mode.
281 1 in a CODE_LABEL if the label is used for nonlocal gotos
282 and must not be deleted even if its count is zero.
283 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
284 together with the preceding insn. Valid only within sched.
285 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
286 from the target of a branch. Valid from reorg until end of compilation;
287 cleared before used. */
288 unsigned int in_struct : 1;
289 /* At the end of RTL generation, 1 if this rtx is used. This is used for
290 copying shared structure. See `unshare_all_rtl'.
291 In a REG, this is not needed for that purpose, and used instead
292 in `leaf_renumber_regs_insn'.
293 1 in a SYMBOL_REF, means that emit_library_call
294 has used it as the function. */
295 unsigned int used : 1;
296 /* 1 in an INSN or a SET if this rtx is related to the call frame,
297 either changing how we compute the frame address or saving and
298 restoring registers in the prologue and epilogue.
299 1 in a REG or MEM if it is a pointer.
300 1 in a SYMBOL_REF if it addresses something in the per-function
301 constant string pool. */
302 unsigned frame_related : 1;
303 /* 1 in a REG or PARALLEL that is the current function's return value.
304 1 in a MEM if it refers to a scalar.
305 1 in a SYMBOL_REF for a weak symbol.
306 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
307 unsigned return_val : 1;
308
309 /* The first element of the operands of this rtx.
310 The number of operands and their types are controlled
311 by the `code' field, according to rtl.def. */
312 union u {
313 rtunion fld[1];
314 HOST_WIDE_INT hwint[1];
315 struct block_symbol block_sym;
316 struct real_value rv;
317 struct fixed_value fv;
318 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
319 };
320
321 /* The size in bytes of an rtx header (code, mode and flags). */
322 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
323
324 /* The size in bytes of an rtx with code CODE. */
325 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
326
327 #define NULL_RTX (rtx) 0
328
329 /* The "next" and "previous" RTX, relative to this one. */
330
331 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
332 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
333
334 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
335 */
336 #define RTX_PREV(X) ((INSN_P (X) \
337 || NOTE_P (X) \
338 || BARRIER_P (X) \
339 || LABEL_P (X)) \
340 && PREV_INSN (X) != NULL \
341 && NEXT_INSN (PREV_INSN (X)) == X \
342 ? PREV_INSN (X) : NULL)
343
344 /* Define macros to access the `code' field of the rtx. */
345
346 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
347 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
348
349 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
350 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
351
352 /* RTL vector. These appear inside RTX's when there is a need
353 for a variable number of things. The principle use is inside
354 PARALLEL expressions. */
355
356 struct GTY(()) rtvec_def {
357 int num_elem; /* number of elements */
358 rtx GTY ((length ("%h.num_elem"))) elem[1];
359 };
360
361 #define NULL_RTVEC (rtvec) 0
362
363 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
364 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
365
366 /* Predicate yielding nonzero iff X is an rtx for a register. */
367 #define REG_P(X) (GET_CODE (X) == REG)
368
369 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
370 #define MEM_P(X) (GET_CODE (X) == MEM)
371
372 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
373 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
374
375 /* Predicate yielding true iff X is an rtx for a double-int
376 or floating point constant. */
377 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
378
379 /* Predicate yielding nonzero iff X is a label insn. */
380 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
381
382 /* Predicate yielding nonzero iff X is a jump insn. */
383 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
384
385 /* Predicate yielding nonzero iff X is a call insn. */
386 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
387
388 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
389 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
390
391 /* Predicate yielding nonzero iff X is a debug note/insn. */
392 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
393
394 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
395 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
396
397 /* Nonzero if DEBUG_INSN_P may possibly hold. */
398 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
399
400 /* Predicate yielding nonzero iff X is a real insn. */
401 #define INSN_P(X) \
402 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
403
404 /* Predicate yielding nonzero iff X is a note insn. */
405 #define NOTE_P(X) (GET_CODE (X) == NOTE)
406
407 /* Predicate yielding nonzero iff X is a barrier insn. */
408 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
409
410 /* Predicate yielding nonzero iff X is a data for a jump table. */
411 #define JUMP_TABLE_DATA_P(INSN) \
412 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
413 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
414
415 /* 1 if X is a unary operator. */
416
417 #define UNARY_P(X) \
418 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
419
420 /* 1 if X is a binary operator. */
421
422 #define BINARY_P(X) \
423 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
424
425 /* 1 if X is an arithmetic operator. */
426
427 #define ARITHMETIC_P(X) \
428 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
429 == RTX_ARITHMETIC_RESULT)
430
431 /* 1 if X is an arithmetic operator. */
432
433 #define COMMUTATIVE_ARITH_P(X) \
434 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
435
436 /* 1 if X is a commutative arithmetic operator or a comparison operator.
437 These two are sometimes selected together because it is possible to
438 swap the two operands. */
439
440 #define SWAPPABLE_OPERANDS_P(X) \
441 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
442 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
443 | (1 << RTX_COMPARE)))
444
445 /* 1 if X is a non-commutative operator. */
446
447 #define NON_COMMUTATIVE_P(X) \
448 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
449 == RTX_NON_COMMUTATIVE_RESULT)
450
451 /* 1 if X is a commutative operator on integers. */
452
453 #define COMMUTATIVE_P(X) \
454 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
455 == RTX_COMMUTATIVE_RESULT)
456
457 /* 1 if X is a relational operator. */
458
459 #define COMPARISON_P(X) \
460 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
461
462 /* 1 if X is a constant value that is an integer. */
463
464 #define CONSTANT_P(X) \
465 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
466
467 /* 1 if X can be used to represent an object. */
468 #define OBJECT_P(X) \
469 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
470
471 /* General accessor macros for accessing the fields of an rtx. */
472
473 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
474 /* The bit with a star outside the statement expr and an & inside is
475 so that N can be evaluated only once. */
476 #define RTL_CHECK1(RTX, N, C1) __extension__ \
477 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
478 const enum rtx_code _code = GET_CODE (_rtx); \
479 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
480 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
481 __FUNCTION__); \
482 if (GET_RTX_FORMAT(_code)[_n] != C1) \
483 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
484 __FUNCTION__); \
485 &_rtx->u.fld[_n]; }))
486
487 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
488 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
489 const enum rtx_code _code = GET_CODE (_rtx); \
490 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
491 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
492 __FUNCTION__); \
493 if (GET_RTX_FORMAT(_code)[_n] != C1 \
494 && GET_RTX_FORMAT(_code)[_n] != C2) \
495 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
496 __FUNCTION__); \
497 &_rtx->u.fld[_n]; }))
498
499 #define RTL_CHECKC1(RTX, N, C) __extension__ \
500 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
501 if (GET_CODE (_rtx) != (C)) \
502 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
503 __FUNCTION__); \
504 &_rtx->u.fld[_n]; }))
505
506 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
507 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
508 const enum rtx_code _code = GET_CODE (_rtx); \
509 if (_code != (C1) && _code != (C2)) \
510 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
511 __FUNCTION__); \
512 &_rtx->u.fld[_n]; }))
513
514 #define RTVEC_ELT(RTVEC, I) __extension__ \
515 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
516 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
517 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
518 __FUNCTION__); \
519 &_rtvec->elem[_i]; }))
520
521 #define XWINT(RTX, N) __extension__ \
522 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
523 const enum rtx_code _code = GET_CODE (_rtx); \
524 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
525 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
526 __FUNCTION__); \
527 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
528 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
529 __FUNCTION__); \
530 &_rtx->u.hwint[_n]; }))
531
532 #define XCWINT(RTX, N, C) __extension__ \
533 (*({ __typeof (RTX) const _rtx = (RTX); \
534 if (GET_CODE (_rtx) != (C)) \
535 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
536 __FUNCTION__); \
537 &_rtx->u.hwint[N]; }))
538
539 #define XCMWINT(RTX, N, C, M) __extension__ \
540 (*({ __typeof (RTX) const _rtx = (RTX); \
541 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
542 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
543 __LINE__, __FUNCTION__); \
544 &_rtx->u.hwint[N]; }))
545
546 #define XCNMPRV(RTX, C, M) __extension__ \
547 ({ __typeof (RTX) const _rtx = (RTX); \
548 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
549 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
550 __LINE__, __FUNCTION__); \
551 &_rtx->u.rv; })
552
553 #define XCNMPFV(RTX, C, M) __extension__ \
554 ({ __typeof (RTX) const _rtx = (RTX); \
555 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
556 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
557 __LINE__, __FUNCTION__); \
558 &_rtx->u.fv; })
559
560 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
561 ({ __typeof (RTX) const _symbol = (RTX); \
562 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
563 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
564 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
565 __FUNCTION__); \
566 &_symbol->u.block_sym; })
567
568 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
569 const char *)
570 ATTRIBUTE_NORETURN;
571 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
572 const char *)
573 ATTRIBUTE_NORETURN;
574 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
575 int, const char *)
576 ATTRIBUTE_NORETURN;
577 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
578 int, const char *)
579 ATTRIBUTE_NORETURN;
580 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
581 const char *, int, const char *)
582 ATTRIBUTE_NORETURN;
583 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
584 bool, const char *, int, const char *)
585 ATTRIBUTE_NORETURN;
586 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
587 ATTRIBUTE_NORETURN;
588 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
589 const char *)
590 ATTRIBUTE_NORETURN;
591
592 #else /* not ENABLE_RTL_CHECKING */
593
594 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
595 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
596 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
597 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
598 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
599 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
600 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
601 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
602 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
603 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
604 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
605 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
606
607 #endif
608
609 /* General accessor macros for accessing the flags of an rtx. */
610
611 /* Access an individual rtx flag, with no checking of any kind. */
612 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
613
614 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
615 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
616 ({ __typeof (RTX) const _rtx = (RTX); \
617 if (GET_CODE(_rtx) != C1) \
618 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
619 __FUNCTION__); \
620 _rtx; })
621
622 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
623 ({ __typeof (RTX) const _rtx = (RTX); \
624 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
625 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
626 __FUNCTION__); \
627 _rtx; })
628
629 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
630 ({ __typeof (RTX) const _rtx = (RTX); \
631 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
632 && GET_CODE(_rtx) != C3) \
633 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
634 __FUNCTION__); \
635 _rtx; })
636
637 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
638 ({ __typeof (RTX) const _rtx = (RTX); \
639 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
640 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
641 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
642 __FUNCTION__); \
643 _rtx; })
644
645 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
646 ({ __typeof (RTX) const _rtx = (RTX); \
647 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
648 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
649 && GET_CODE(_rtx) != C5) \
650 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
651 __FUNCTION__); \
652 _rtx; })
653
654 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
655 __extension__ \
656 ({ __typeof (RTX) const _rtx = (RTX); \
657 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
658 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
659 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
660 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
661 __FUNCTION__); \
662 _rtx; })
663
664 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
665 __extension__ \
666 ({ __typeof (RTX) const _rtx = (RTX); \
667 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
668 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
669 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
670 && GET_CODE(_rtx) != C7) \
671 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
672 __FUNCTION__); \
673 _rtx; })
674
675 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
676 __extension__ \
677 ({ __typeof (RTX) const _rtx = (RTX); \
678 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
679 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
680 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
681 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
682 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
683 __FUNCTION__); \
684 _rtx; })
685
686 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
687 int, const char *)
688 ATTRIBUTE_NORETURN
689 ;
690
691 #else /* not ENABLE_RTL_FLAG_CHECKING */
692
693 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
694 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
695 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
696 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
697 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
698 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
699 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
700 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
701 #endif
702
703 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
704 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
705 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
706 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
707 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
708 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
709 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
710 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
711 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
712
713 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
714 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
715
716 /* These are like XINT, etc. except that they expect a '0' field instead
717 of the normal type code. */
718
719 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
720 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
721 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
722 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
723 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
724 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
725 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit)
726 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
727 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
728 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
729 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
730 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
731 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
732 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
733
734 /* Access a '0' field with any type. */
735 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
736
737 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
738 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
739 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
740 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
741 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
742 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
743 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit)
744 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
745 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
746 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
747
748 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
749 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
750
751 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
752 \f
753 /* ACCESS MACROS for particular fields of insns. */
754
755 /* Holds a unique number for each insn.
756 These are not necessarily sequentially increasing. */
757 #define INSN_UID(INSN) XINT (INSN, 0)
758
759 /* Chain insns together in sequence. */
760 #define PREV_INSN(INSN) XEXP (INSN, 1)
761 #define NEXT_INSN(INSN) XEXP (INSN, 2)
762
763 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
764 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
765 /* LOCATION of an RTX if relevant. */
766 #define RTL_LOCATION(X) (INSN_P (X) ? \
767 locator_location (INSN_LOCATOR (X)) \
768 : UNKNOWN_LOCATION)
769 /* LOCATION of current INSN. */
770 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
771 /* The body of an insn. */
772 #define PATTERN(INSN) XEXP (INSN, 5)
773
774 /* Code number of instruction, from when it was recognized.
775 -1 means this instruction has not been recognized yet. */
776 #define INSN_CODE(INSN) XINT (INSN, 6)
777
778 #define RTX_FRAME_RELATED_P(RTX) \
779 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
780 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
781
782 /* 1 if RTX is an insn that has been deleted. */
783 #define INSN_DELETED_P(RTX) \
784 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
785 CALL_INSN, JUMP_INSN, \
786 CODE_LABEL, BARRIER, NOTE)->volatil)
787
788 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
789 TREE_READONLY. */
790 #define RTL_CONST_CALL_P(RTX) \
791 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
792
793 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
794 DECL_PURE_P. */
795 #define RTL_PURE_CALL_P(RTX) \
796 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
797
798 /* 1 if RTX is a call to a const or pure function. */
799 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
800 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
801
802 /* 1 if RTX is a call to a looping const or pure function. Built from
803 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
804 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
805 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
806
807 /* 1 if RTX is a call_insn for a sibling call. */
808 #define SIBLING_CALL_P(RTX) \
809 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
810
811 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
812 #define INSN_ANNULLED_BRANCH_P(RTX) \
813 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
814
815 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
816 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
817 executed if the branch is taken. For annulled branches with this bit
818 clear, the insn should be executed only if the branch is not taken. */
819 #define INSN_FROM_TARGET_P(RTX) \
820 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
821
822 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
823 See the comments for ADDR_DIFF_VEC in rtl.def. */
824 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
825
826 /* In a VALUE, the value cselib has assigned to RTX.
827 This is a "struct cselib_val_struct", see cselib.h. */
828 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
829
830 /* Holds a list of notes on what this insn does to various REGs.
831 It is a chain of EXPR_LIST rtx's, where the second operand is the
832 chain pointer and the first operand is the REG being described.
833 The mode field of the EXPR_LIST contains not a real machine mode
834 but a value from enum reg_note. */
835 #define REG_NOTES(INSN) XEXP(INSN, 7)
836
837 enum reg_note
838 {
839 #define DEF_REG_NOTE(NAME) NAME,
840 #include "reg-notes.def"
841 #undef DEF_REG_NOTE
842 REG_NOTE_MAX
843 };
844
845 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
846 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
847 #define PUT_REG_NOTE_KIND(LINK, KIND) \
848 PUT_MODE (LINK, (enum machine_mode) (KIND))
849
850 /* Names for REG_NOTE's in EXPR_LIST insn's. */
851
852 extern const char * const reg_note_name[];
853 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
854
855 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
856 USE and CLOBBER expressions.
857 USE expressions list the registers filled with arguments that
858 are passed to the function.
859 CLOBBER expressions document the registers explicitly clobbered
860 by this CALL_INSN.
861 Pseudo registers can not be mentioned in this list. */
862 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
863
864 /* The label-number of a code-label. The assembler label
865 is made from `L' and the label-number printed in decimal.
866 Label numbers are unique in a compilation. */
867 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
868
869 /* In a NOTE that is a line number, this is a string for the file name that the
870 line is in. We use the same field to record block numbers temporarily in
871 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
872 between ints and pointers if we use a different macro for the block number.)
873 */
874
875 /* Opaque data. */
876 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
877 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
878 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
879 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
880 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
881 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
882 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
883
884 /* In a NOTE that is a line number, this is the line number.
885 Other kinds of NOTEs are identified by negative numbers here. */
886 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
887
888 /* Nonzero if INSN is a note marking the beginning of a basic block. */
889 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
890 (GET_CODE (INSN) == NOTE \
891 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
892
893 /* Variable declaration and the location of a variable. */
894 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
895 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
896
897 /* Initialization status of the variable in the location. Status
898 can be unknown, uninitialized or initialized. See enumeration
899 type below. */
900 #define PAT_VAR_LOCATION_STATUS(PAT) \
901 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
902
903 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
904 #define NOTE_VAR_LOCATION_DECL(NOTE) \
905 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
906 #define NOTE_VAR_LOCATION_LOC(NOTE) \
907 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
908 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
909 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
910
911 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
912 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
913
914 /* Accessors for a tree-expanded var location debug insn. */
915 #define INSN_VAR_LOCATION_DECL(INSN) \
916 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
917 #define INSN_VAR_LOCATION_LOC(INSN) \
918 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
919 #define INSN_VAR_LOCATION_STATUS(INSN) \
920 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
921
922 /* Expand to the RTL that denotes an unknown variable location in a
923 DEBUG_INSN. */
924 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
925
926 /* Determine whether X is such an unknown location. */
927 #define VAR_LOC_UNKNOWN_P(X) \
928 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
929
930 /* 1 if RTX is emitted after a call, but it should take effect before
931 the call returns. */
932 #define NOTE_DURING_CALL_P(RTX) \
933 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
934
935 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
936 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
937
938 /* Possible initialization status of a variable. When requested
939 by the user, this information is tracked and recorded in the DWARF
940 debug information, along with the variable's location. */
941 enum var_init_status
942 {
943 VAR_INIT_STATUS_UNKNOWN,
944 VAR_INIT_STATUS_UNINITIALIZED,
945 VAR_INIT_STATUS_INITIALIZED
946 };
947
948 /* Codes that appear in the NOTE_KIND field for kinds of notes
949 that are not line numbers. These codes are all negative.
950
951 Notice that we do not try to use zero here for any of
952 the special note codes because sometimes the source line
953 actually can be zero! This happens (for example) when we
954 are generating code for the per-translation-unit constructor
955 and destructor routines for some C++ translation unit. */
956
957 enum insn_note
958 {
959 #define DEF_INSN_NOTE(NAME) NAME,
960 #include "insn-notes.def"
961 #undef DEF_INSN_NOTE
962
963 NOTE_INSN_MAX
964 };
965
966 /* Names for NOTE insn's other than line numbers. */
967
968 extern const char * const note_insn_name[NOTE_INSN_MAX];
969 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
970 (note_insn_name[(NOTE_CODE)])
971
972 /* The name of a label, in case it corresponds to an explicit label
973 in the input source code. */
974 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
975
976 /* In jump.c, each label contains a count of the number
977 of LABEL_REFs that point at it, so unused labels can be deleted. */
978 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
979
980 /* Labels carry a two-bit field composed of the ->jump and ->call
981 bits. This field indicates whether the label is an alternate
982 entry point, and if so, what kind. */
983 enum label_kind
984 {
985 LABEL_NORMAL = 0, /* ordinary label */
986 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
987 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
988 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
989 };
990
991 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
992
993 /* Retrieve the kind of LABEL. */
994 #define LABEL_KIND(LABEL) __extension__ \
995 ({ __typeof (LABEL) const _label = (LABEL); \
996 if (GET_CODE (_label) != CODE_LABEL) \
997 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
998 __FUNCTION__); \
999 (enum label_kind) ((_label->jump << 1) | _label->call); })
1000
1001 /* Set the kind of LABEL. */
1002 #define SET_LABEL_KIND(LABEL, KIND) do { \
1003 __typeof (LABEL) const _label = (LABEL); \
1004 const unsigned int _kind = (KIND); \
1005 if (GET_CODE (_label) != CODE_LABEL) \
1006 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1007 __FUNCTION__); \
1008 _label->jump = ((_kind >> 1) & 1); \
1009 _label->call = (_kind & 1); \
1010 } while (0)
1011
1012 #else
1013
1014 /* Retrieve the kind of LABEL. */
1015 #define LABEL_KIND(LABEL) \
1016 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1017
1018 /* Set the kind of LABEL. */
1019 #define SET_LABEL_KIND(LABEL, KIND) do { \
1020 rtx const _label = (LABEL); \
1021 const unsigned int _kind = (KIND); \
1022 _label->jump = ((_kind >> 1) & 1); \
1023 _label->call = (_kind & 1); \
1024 } while (0)
1025
1026 #endif /* rtl flag checking */
1027
1028 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1029
1030 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1031 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1032 be decremented and possibly the label can be deleted. */
1033 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1034
1035 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1036 goes through all the LABEL_REFs that jump to that label. The chain
1037 eventually winds up at the CODE_LABEL: it is circular. */
1038 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1039 \f
1040 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1041 be used on RHS. Use SET_REGNO to change the value. */
1042 #define REGNO(RTX) (rhs_regno(RTX))
1043 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1044
1045 /* ORIGINAL_REGNO holds the number the register originally had; for a
1046 pseudo register turned into a hard reg this will hold the old pseudo
1047 register number. */
1048 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1049
1050 /* Force the REGNO macro to only be used on the lhs. */
1051 static inline unsigned int
1052 rhs_regno (const_rtx x)
1053 {
1054 return XCUINT (x, 0, REG);
1055 }
1056
1057
1058
1059 /* 1 if RTX is a reg or parallel that is the current function's return
1060 value. */
1061 #define REG_FUNCTION_VALUE_P(RTX) \
1062 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1063
1064 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1065 #define REG_USERVAR_P(RTX) \
1066 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1067
1068 /* 1 if RTX is a reg that holds a pointer value. */
1069 #define REG_POINTER(RTX) \
1070 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1071
1072 /* 1 if RTX is a mem that holds a pointer value. */
1073 #define MEM_POINTER(RTX) \
1074 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1075
1076 /* 1 if the given register REG corresponds to a hard register. */
1077 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1078
1079 /* 1 if the given register number REG_NO corresponds to a hard register. */
1080 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1081
1082 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1083 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1084 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1085
1086 /* For a CONST_DOUBLE:
1087 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1088 low-order word and ..._HIGH the high-order.
1089 For a float, there is a REAL_VALUE_TYPE structure, and
1090 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1091 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1092 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1093 #define CONST_DOUBLE_REAL_VALUE(r) \
1094 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1095
1096 #define CONST_FIXED_VALUE(r) \
1097 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1098 #define CONST_FIXED_VALUE_HIGH(r) \
1099 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1100 #define CONST_FIXED_VALUE_LOW(r) \
1101 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1102
1103 /* For a CONST_VECTOR, return element #n. */
1104 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1105
1106 /* For a CONST_VECTOR, return the number of elements in a vector. */
1107 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1108
1109 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1110 SUBREG_BYTE extracts the byte-number. */
1111
1112 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1113 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1114
1115 /* in rtlanal.c */
1116 /* Return the right cost to give to an operation
1117 to make the cost of the corresponding register-to-register instruction
1118 N times that of a fast register-to-register instruction. */
1119 #define COSTS_N_INSNS(N) ((N) * 4)
1120
1121 /* Maximum cost of an rtl expression. This value has the special meaning
1122 not to use an rtx with this cost under any circumstances. */
1123 #define MAX_COST INT_MAX
1124
1125 extern void init_rtlanal (void);
1126 extern int rtx_cost (rtx, enum rtx_code, bool);
1127 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1128 extern unsigned int subreg_lsb (const_rtx);
1129 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1130 unsigned int);
1131 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1132 unsigned int, enum machine_mode);
1133 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1134 unsigned int, enum machine_mode);
1135 extern unsigned int subreg_regno (const_rtx);
1136 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1137 unsigned int, enum machine_mode);
1138 extern unsigned int subreg_nregs (const_rtx);
1139 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1140 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1141 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1142 extern bool constant_pool_constant_p (rtx);
1143 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1144 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1145
1146
1147 /* 1 if RTX is a subreg containing a reg that is already known to be
1148 sign- or zero-extended from the mode of the subreg to the mode of
1149 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1150 extension.
1151
1152 When used as a LHS, is means that this extension must be done
1153 when assigning to SUBREG_REG. */
1154
1155 #define SUBREG_PROMOTED_VAR_P(RTX) \
1156 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1157
1158 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1159 do { \
1160 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1161 if ((VAL) < 0) \
1162 _rtx->volatil = 1; \
1163 else { \
1164 _rtx->volatil = 0; \
1165 _rtx->unchanging = (VAL); \
1166 } \
1167 } while (0)
1168
1169 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1170 this gives the necessary extensions:
1171 0 - signed
1172 1 - normal unsigned
1173 -1 - pointer unsigned, which most often can be handled like unsigned
1174 extension, except for generating instructions where we need to
1175 emit special code (ptr_extend insns) on some architectures. */
1176
1177 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1178 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1179 ? -1 : (int) (RTX)->unchanging)
1180
1181 /* Access various components of an ASM_OPERANDS rtx. */
1182
1183 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1184 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1185 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1186 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1187 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1188 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1189 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1190 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1191 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1192 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1193 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1194 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1195 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1196 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1197 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1198 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1199 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1200 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1201
1202 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1203 #define MEM_READONLY_P(RTX) \
1204 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1205
1206 /* 1 if RTX is a mem and we should keep the alias set for this mem
1207 unchanged when we access a component. Set to 1, or example, when we
1208 are already in a non-addressable component of an aggregate. */
1209 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1210 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1211
1212 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1213 #define MEM_VOLATILE_P(RTX) \
1214 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1215 ASM_INPUT)->volatil)
1216
1217 /* 1 if RTX is a mem that refers to an aggregate, either to the
1218 aggregate itself or to a field of the aggregate. If zero, RTX may
1219 or may not be such a reference. */
1220 #define MEM_IN_STRUCT_P(RTX) \
1221 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1222
1223 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1224 not refer to a scalar. */
1225 #define MEM_SCALAR_P(RTX) \
1226 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1227
1228 /* 1 if RTX is a mem that cannot trap. */
1229 #define MEM_NOTRAP_P(RTX) \
1230 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1231
1232 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1233 RTX. Otherwise, vice versa. Use this macro only when you are
1234 *sure* that you know that the MEM is in a structure, or is a
1235 scalar. VAL is evaluated only once. */
1236 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \
1237 do { \
1238 if (VAL) \
1239 { \
1240 MEM_IN_STRUCT_P (RTX) = 1; \
1241 MEM_SCALAR_P (RTX) = 0; \
1242 } \
1243 else \
1244 { \
1245 MEM_IN_STRUCT_P (RTX) = 0; \
1246 MEM_SCALAR_P (RTX) = 1; \
1247 } \
1248 } while (0)
1249
1250 /* The memory attribute block. We provide access macros for each value
1251 in the block and provide defaults if none specified. */
1252 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1253
1254 /* The register attribute block. We provide access macros for each value
1255 in the block and provide defaults if none specified. */
1256 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1257
1258 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1259 set, and may alias anything. Otherwise, the MEM can only alias
1260 MEMs in a conflicting alias set. This value is set in a
1261 language-dependent manner in the front-end, and should not be
1262 altered in the back-end. These set numbers are tested with
1263 alias_sets_conflict_p. */
1264 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1265
1266 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1267 refer to part of a DECL. It may also be a COMPONENT_REF. */
1268 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1269
1270 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1271 RTX that is always a CONST_INT. */
1272 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1273
1274 /* For a MEM rtx, the address space. */
1275 #define MEM_ADDR_SPACE(RTX) (MEM_ATTRS (RTX) == 0 ? ADDR_SPACE_GENERIC \
1276 : MEM_ATTRS (RTX)->addrspace)
1277
1278 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1279 is always a CONST_INT. */
1280 #define MEM_SIZE(RTX) \
1281 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \
1282 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1283 : 0)
1284
1285 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1286 mode as a default when STRICT_ALIGNMENT, but not if not. */
1287 #define MEM_ALIGN(RTX) \
1288 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \
1289 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \
1290 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1291
1292 /* For a REG rtx, the decl it is known to refer to, if it is known to
1293 refer to part of a DECL. */
1294 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1295
1296 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1297 HOST_WIDE_INT. */
1298 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1299
1300 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1301 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1302 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1303 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1304 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1305 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1306 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1307 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1308 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1309 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1310
1311 /* 1 if RTX is a label_ref for a nonlocal label. */
1312 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1313 REG_LABEL_TARGET note. */
1314 #define LABEL_REF_NONLOCAL_P(RTX) \
1315 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1316
1317 /* 1 if RTX is a code_label that should always be considered to be needed. */
1318 #define LABEL_PRESERVE_P(RTX) \
1319 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1320
1321 /* During sched, 1 if RTX is an insn that must be scheduled together
1322 with the preceding insn. */
1323 #define SCHED_GROUP_P(RTX) \
1324 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1325 JUMP_INSN, CALL_INSN \
1326 )->in_struct)
1327
1328 /* For a SET rtx, SET_DEST is the place that is set
1329 and SET_SRC is the value it is set to. */
1330 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1331 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1332 #define SET_IS_RETURN_P(RTX) \
1333 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1334
1335 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1336 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1337 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1338
1339 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1340 conditionally executing the code on, COND_EXEC_CODE is the code
1341 to execute if the condition is true. */
1342 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1343 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1344
1345 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1346 constants pool. */
1347 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1348 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1349
1350 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1351 tree constant pool. This information is private to varasm.c. */
1352 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1353 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1354 (RTX), SYMBOL_REF)->frame_related)
1355
1356 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1357 #define SYMBOL_REF_FLAG(RTX) \
1358 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1359
1360 /* 1 if RTX is a symbol_ref that has been the library function in
1361 emit_library_call. */
1362 #define SYMBOL_REF_USED(RTX) \
1363 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1364
1365 /* 1 if RTX is a symbol_ref for a weak symbol. */
1366 #define SYMBOL_REF_WEAK(RTX) \
1367 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1368
1369 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1370 SYMBOL_REF_CONSTANT. */
1371 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1372
1373 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1374 pool symbol. */
1375 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1376 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1377
1378 /* The tree (decl or constant) associated with the symbol, or null. */
1379 #define SYMBOL_REF_DECL(RTX) \
1380 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1381
1382 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1383 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1384 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1385
1386 /* The rtx constant pool entry for a symbol, or null. */
1387 #define SYMBOL_REF_CONSTANT(RTX) \
1388 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1389
1390 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1391 information derivable from the tree decl associated with this symbol.
1392 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1393 decl. In some cases this is a bug. But beyond that, it's nice to cache
1394 this information to avoid recomputing it. Finally, this allows space for
1395 the target to store more than one bit of information, as with
1396 SYMBOL_REF_FLAG. */
1397 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1398
1399 /* These flags are common enough to be defined for all targets. They
1400 are computed by the default version of targetm.encode_section_info. */
1401
1402 /* Set if this symbol is a function. */
1403 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1404 #define SYMBOL_REF_FUNCTION_P(RTX) \
1405 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1406 /* Set if targetm.binds_local_p is true. */
1407 #define SYMBOL_FLAG_LOCAL (1 << 1)
1408 #define SYMBOL_REF_LOCAL_P(RTX) \
1409 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1410 /* Set if targetm.in_small_data_p is true. */
1411 #define SYMBOL_FLAG_SMALL (1 << 2)
1412 #define SYMBOL_REF_SMALL_P(RTX) \
1413 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1414 /* The three-bit field at [5:3] is true for TLS variables; use
1415 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1416 #define SYMBOL_FLAG_TLS_SHIFT 3
1417 #define SYMBOL_REF_TLS_MODEL(RTX) \
1418 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1419 /* Set if this symbol is not defined in this translation unit. */
1420 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1421 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1422 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1423 /* Set if this symbol has a block_symbol structure associated with it. */
1424 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1425 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1426 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1427 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1428 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1429 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1430 #define SYMBOL_REF_ANCHOR_P(RTX) \
1431 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1432
1433 /* Subsequent bits are available for the target to use. */
1434 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1435 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1436
1437 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1438 structure to which the symbol belongs, or NULL if it has not been
1439 assigned a block. */
1440 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1441
1442 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1443 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1444 RTX has not yet been assigned to a block, or it has not been given an
1445 offset within that block. */
1446 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1447
1448 /* True if RTX is flagged to be a scheduling barrier. */
1449 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1450 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1451
1452 /* Indicate whether the machine has any sort of auto increment addressing.
1453 If not, we can avoid checking for REG_INC notes. */
1454
1455 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1456 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1457 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1458 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1459 #define AUTO_INC_DEC
1460 #endif
1461
1462 /* Define a macro to look for REG_INC notes,
1463 but save time on machines where they never exist. */
1464
1465 #ifdef AUTO_INC_DEC
1466 #define FIND_REG_INC_NOTE(INSN, REG) \
1467 ((REG) != NULL_RTX && REG_P ((REG)) \
1468 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1469 : find_reg_note ((INSN), REG_INC, (REG)))
1470 #else
1471 #define FIND_REG_INC_NOTE(INSN, REG) 0
1472 #endif
1473
1474 #ifndef HAVE_PRE_INCREMENT
1475 #define HAVE_PRE_INCREMENT 0
1476 #endif
1477
1478 #ifndef HAVE_PRE_DECREMENT
1479 #define HAVE_PRE_DECREMENT 0
1480 #endif
1481
1482 #ifndef HAVE_POST_INCREMENT
1483 #define HAVE_POST_INCREMENT 0
1484 #endif
1485
1486 #ifndef HAVE_POST_DECREMENT
1487 #define HAVE_POST_DECREMENT 0
1488 #endif
1489
1490 #ifndef HAVE_POST_MODIFY_DISP
1491 #define HAVE_POST_MODIFY_DISP 0
1492 #endif
1493
1494 #ifndef HAVE_POST_MODIFY_REG
1495 #define HAVE_POST_MODIFY_REG 0
1496 #endif
1497
1498 #ifndef HAVE_PRE_MODIFY_DISP
1499 #define HAVE_PRE_MODIFY_DISP 0
1500 #endif
1501
1502 #ifndef HAVE_PRE_MODIFY_REG
1503 #define HAVE_PRE_MODIFY_REG 0
1504 #endif
1505
1506
1507 /* Some architectures do not have complete pre/post increment/decrement
1508 instruction sets, or only move some modes efficiently. These macros
1509 allow us to tune autoincrement generation. */
1510
1511 #ifndef USE_LOAD_POST_INCREMENT
1512 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1513 #endif
1514
1515 #ifndef USE_LOAD_POST_DECREMENT
1516 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1517 #endif
1518
1519 #ifndef USE_LOAD_PRE_INCREMENT
1520 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1521 #endif
1522
1523 #ifndef USE_LOAD_PRE_DECREMENT
1524 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1525 #endif
1526
1527 #ifndef USE_STORE_POST_INCREMENT
1528 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1529 #endif
1530
1531 #ifndef USE_STORE_POST_DECREMENT
1532 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1533 #endif
1534
1535 #ifndef USE_STORE_PRE_INCREMENT
1536 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1537 #endif
1538
1539 #ifndef USE_STORE_PRE_DECREMENT
1540 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1541 #endif
1542 \f
1543 /* Nonzero when we are generating CONCATs. */
1544 extern int generating_concat_p;
1545
1546 /* Nonzero when we are expanding trees to RTL. */
1547 extern int currently_expanding_to_rtl;
1548
1549 /* Generally useful functions. */
1550
1551 /* In expmed.c */
1552 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1553
1554 /* In explow.c */
1555 extern void set_stack_check_libfunc (rtx);
1556 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1557 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1558
1559 /* In emit-rtl.c */
1560 extern rtx gen_blockage (void);
1561 extern rtvec gen_rtvec (int, ...);
1562 extern rtx copy_insn_1 (rtx);
1563 extern rtx copy_insn (rtx);
1564 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1565 extern rtx emit_copy_of_insn_after (rtx, rtx);
1566 extern void set_reg_attrs_from_value (rtx, rtx);
1567 extern void set_reg_attrs_for_parm (rtx, rtx);
1568 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1569 extern void adjust_reg_mode (rtx, enum machine_mode);
1570 extern int mem_expr_equal_p (const_tree, const_tree);
1571
1572 /* In rtl.c */
1573 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1574 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1575
1576 extern rtvec rtvec_alloc (int);
1577 extern rtvec shallow_copy_rtvec (rtvec);
1578 extern bool shared_const_p (const_rtx);
1579 extern rtx copy_rtx (rtx);
1580 extern void dump_rtx_statistics (void);
1581
1582 /* In emit-rtl.c */
1583 extern rtx copy_rtx_if_shared (rtx);
1584
1585 /* In rtl.c */
1586 extern unsigned int rtx_size (const_rtx);
1587 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1588 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1589 extern int rtx_equal_p (const_rtx, const_rtx);
1590
1591 /* In emit-rtl.c */
1592 extern rtvec gen_rtvec_v (int, rtx *);
1593 extern rtx gen_reg_rtx (enum machine_mode);
1594 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1595 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1596 extern rtx gen_reg_rtx_and_attrs (rtx);
1597 extern rtx gen_label_rtx (void);
1598 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1599
1600 /* In cse.c */
1601 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1602
1603 /* In emit-rtl.c */
1604 extern rtx gen_highpart (enum machine_mode, rtx);
1605 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1606 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1607
1608 /* In emit-rtl.c */
1609 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1610 extern int subreg_lowpart_p (const_rtx);
1611 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1612 enum machine_mode);
1613 extern unsigned int subreg_highpart_offset (enum machine_mode,
1614 enum machine_mode);
1615 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1616 extern rtx make_safe_from (rtx, rtx);
1617 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1618 addr_space_t);
1619 #define convert_memory_address(to_mode,x) \
1620 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1621 extern rtx get_insns (void);
1622 extern const char *get_insn_name (int);
1623 extern rtx get_last_insn (void);
1624 extern rtx get_last_insn_anywhere (void);
1625 extern rtx get_first_nonnote_insn (void);
1626 extern rtx get_last_nonnote_insn (void);
1627 extern void start_sequence (void);
1628 extern void push_to_sequence (rtx);
1629 extern void push_to_sequence2 (rtx, rtx);
1630 extern void end_sequence (void);
1631 extern double_int rtx_to_double_int (const_rtx);
1632 extern rtx immed_double_int_const (double_int, enum machine_mode);
1633 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1634 enum machine_mode);
1635
1636 /* In loop-iv.c */
1637
1638 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1639
1640 /* In varasm.c */
1641 extern rtx force_const_mem (enum machine_mode, rtx);
1642
1643 /* In varasm.c */
1644
1645 struct function;
1646 extern rtx get_pool_constant (rtx);
1647 extern rtx get_pool_constant_mark (rtx, bool *);
1648 extern enum machine_mode get_pool_mode (const_rtx);
1649 extern rtx simplify_subtraction (rtx);
1650
1651 /* In function.c */
1652 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1653 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1654 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1655 extern rtx assign_stack_temp_for_type (enum machine_mode,
1656 HOST_WIDE_INT, int, tree);
1657 extern rtx assign_temp (tree, int, int, int);
1658
1659 /* In emit-rtl.c */
1660 extern rtx emit_insn_before (rtx, rtx);
1661 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1662 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1663 extern rtx emit_jump_insn_before (rtx, rtx);
1664 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1665 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1666 extern rtx emit_call_insn_before (rtx, rtx);
1667 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1668 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1669 extern rtx emit_debug_insn_before (rtx, rtx);
1670 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1671 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1672 extern rtx emit_barrier_before (rtx);
1673 extern rtx emit_label_before (rtx, rtx);
1674 extern rtx emit_note_before (enum insn_note, rtx);
1675 extern rtx emit_insn_after (rtx, rtx);
1676 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1677 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1678 extern rtx emit_jump_insn_after (rtx, rtx);
1679 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1680 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1681 extern rtx emit_call_insn_after (rtx, rtx);
1682 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1683 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1684 extern rtx emit_debug_insn_after (rtx, rtx);
1685 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1686 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1687 extern rtx emit_barrier_after (rtx);
1688 extern rtx emit_label_after (rtx, rtx);
1689 extern rtx emit_note_after (enum insn_note, rtx);
1690 extern rtx emit_insn (rtx);
1691 extern rtx emit_debug_insn (rtx);
1692 extern rtx emit_jump_insn (rtx);
1693 extern rtx emit_call_insn (rtx);
1694 extern rtx emit_label (rtx);
1695 extern rtx emit_barrier (void);
1696 extern rtx emit_note (enum insn_note);
1697 extern rtx emit_note_copy (rtx);
1698 extern rtx gen_clobber (rtx);
1699 extern rtx emit_clobber (rtx);
1700 extern rtx gen_use (rtx);
1701 extern rtx emit_use (rtx);
1702 extern rtx make_insn_raw (rtx);
1703 extern rtx make_debug_insn_raw (rtx);
1704 extern rtx make_jump_insn_raw (rtx);
1705 extern void add_function_usage_to (rtx, rtx);
1706 extern rtx last_call_insn (void);
1707 extern rtx previous_insn (rtx);
1708 extern rtx next_insn (rtx);
1709 extern rtx prev_nonnote_insn (rtx);
1710 extern rtx prev_nonnote_insn_bb (rtx);
1711 extern rtx next_nonnote_insn (rtx);
1712 extern rtx next_nonnote_insn_bb (rtx);
1713 extern rtx prev_nondebug_insn (rtx);
1714 extern rtx next_nondebug_insn (rtx);
1715 extern rtx prev_real_insn (rtx);
1716 extern rtx next_real_insn (rtx);
1717 extern rtx prev_active_insn (rtx);
1718 extern rtx next_active_insn (rtx);
1719 extern int active_insn_p (const_rtx);
1720 extern rtx prev_label (rtx);
1721 extern rtx next_label (rtx);
1722 extern rtx skip_consecutive_labels (rtx);
1723 extern rtx next_cc0_user (rtx);
1724 extern rtx prev_cc0_setter (rtx);
1725
1726 /* In cfglayout.c */
1727 extern int insn_line (const_rtx);
1728 extern const char * insn_file (const_rtx);
1729 extern location_t locator_location (int);
1730 extern int locator_line (int);
1731 extern const char * locator_file (int);
1732 extern bool locator_eq (int, int);
1733 extern int prologue_locator, epilogue_locator;
1734
1735 /* In jump.c */
1736 extern enum rtx_code reverse_condition (enum rtx_code);
1737 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1738 extern enum rtx_code swap_condition (enum rtx_code);
1739 extern enum rtx_code unsigned_condition (enum rtx_code);
1740 extern enum rtx_code signed_condition (enum rtx_code);
1741 extern void mark_jump_label (rtx, rtx, int);
1742 extern unsigned int cleanup_barriers (void);
1743
1744 /* In jump.c */
1745 extern rtx delete_related_insns (rtx);
1746
1747 /* In recog.c */
1748 extern rtx *find_constant_term_loc (rtx *);
1749
1750 /* In emit-rtl.c */
1751 extern rtx try_split (rtx, rtx, int);
1752 extern int split_branch_probability;
1753
1754 /* In unknown file */
1755 extern rtx split_insns (rtx, rtx);
1756
1757 /* In simplify-rtx.c */
1758 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1759 rtx, enum machine_mode);
1760 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1761 enum machine_mode);
1762 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1763 rtx, rtx);
1764 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1765 rtx);
1766 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1767 enum machine_mode, rtx, rtx, rtx);
1768 extern rtx simplify_const_relational_operation (enum rtx_code,
1769 enum machine_mode, rtx, rtx);
1770 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1771 enum machine_mode, rtx, rtx);
1772 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1773 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1774 enum machine_mode);
1775 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1776 enum machine_mode, rtx, rtx, rtx);
1777 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1778 enum machine_mode, rtx, rtx);
1779 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1780 unsigned int);
1781 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1782 unsigned int);
1783 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1784 rtx (*fn) (rtx, const_rtx, void *), void *);
1785 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1786 extern rtx simplify_rtx (const_rtx);
1787 extern rtx avoid_constant_pool_reference (rtx);
1788 extern rtx delegitimize_mem_from_attrs (rtx);
1789 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1790
1791 /* In reginfo.c */
1792 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1793 bool);
1794
1795 /* In emit-rtl.c */
1796 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1797 extern void set_insn_deleted (rtx);
1798
1799 /* Functions in rtlanal.c */
1800
1801 /* Single set is implemented as macro for performance reasons. */
1802 #define single_set(I) (INSN_P (I) \
1803 ? (GET_CODE (PATTERN (I)) == SET \
1804 ? PATTERN (I) : single_set_1 (I)) \
1805 : NULL_RTX)
1806 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1807
1808 /* Structure used for passing data to REPLACE_LABEL. */
1809 typedef struct replace_label_data
1810 {
1811 rtx r1;
1812 rtx r2;
1813 bool update_label_nuses;
1814 } replace_label_data;
1815
1816 extern int rtx_addr_can_trap_p (const_rtx);
1817 extern bool nonzero_address_p (const_rtx);
1818 extern int rtx_unstable_p (const_rtx);
1819 extern bool rtx_varies_p (const_rtx, bool);
1820 extern bool rtx_addr_varies_p (const_rtx, bool);
1821 extern HOST_WIDE_INT get_integer_term (const_rtx);
1822 extern rtx get_related_value (const_rtx);
1823 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1824 extern void split_const (rtx, rtx *, rtx *);
1825 extern int reg_mentioned_p (const_rtx, const_rtx);
1826 extern int count_occurrences (const_rtx, const_rtx, int);
1827 extern int reg_referenced_p (const_rtx, const_rtx);
1828 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1829 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1830 extern int commutative_operand_precedence (rtx);
1831 extern bool swap_commutative_operands_p (rtx, rtx);
1832 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1833 extern int no_labels_between_p (const_rtx, const_rtx);
1834 extern int modified_in_p (const_rtx, const_rtx);
1835 extern int reg_set_p (const_rtx, const_rtx);
1836 extern rtx single_set_2 (const_rtx, const_rtx);
1837 extern int multiple_sets (const_rtx);
1838 extern int set_noop_p (const_rtx);
1839 extern int noop_move_p (const_rtx);
1840 extern rtx find_last_value (rtx, rtx *, rtx, int);
1841 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1842 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1843 extern const_rtx set_of (const_rtx, const_rtx);
1844 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1845 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1846 extern int dead_or_set_p (const_rtx, const_rtx);
1847 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1848 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1849 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1850 extern rtx find_reg_equal_equiv_note (const_rtx);
1851 extern rtx find_constant_src (const_rtx);
1852 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1853 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1854 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1855 extern void add_reg_note (rtx, enum reg_note, rtx);
1856 extern void remove_note (rtx, const_rtx);
1857 extern void remove_reg_equal_equiv_notes (rtx);
1858 extern int side_effects_p (const_rtx);
1859 extern int volatile_refs_p (const_rtx);
1860 extern int volatile_insn_p (const_rtx);
1861 extern int may_trap_p_1 (const_rtx, unsigned);
1862 extern int may_trap_p (const_rtx);
1863 extern int may_trap_or_fault_p (const_rtx);
1864 extern bool can_throw_internal (const_rtx);
1865 extern bool can_throw_external (const_rtx);
1866 extern bool insn_could_throw_p (const_rtx);
1867 extern bool insn_nothrow_p (const_rtx);
1868 extern bool can_nonlocal_goto (const_rtx);
1869 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1870 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1871 extern int inequality_comparisons_p (const_rtx);
1872 extern rtx replace_rtx (rtx, rtx, rtx);
1873 extern int replace_label (rtx *, void *);
1874 extern int rtx_referenced_p (rtx, rtx);
1875 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1876 extern int computed_jump_p (const_rtx);
1877
1878 typedef int (*rtx_function) (rtx *, void *);
1879 extern int for_each_rtx (rtx *, rtx_function, void *);
1880
1881 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1882 rtx *, rtx *);
1883 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1884 rtx_equal_p_callback_function);
1885
1886 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1887 enum machine_mode *);
1888 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1889 bool, hash_rtx_callback_function);
1890
1891 extern rtx regno_use_in (unsigned int, rtx);
1892 extern int auto_inc_p (const_rtx);
1893 extern int in_expr_list_p (const_rtx, const_rtx);
1894 extern void remove_node_from_expr_list (const_rtx, rtx *);
1895 extern int loc_mentioned_in_p (rtx *, const_rtx);
1896 extern rtx find_first_parameter_load (rtx, rtx);
1897 extern bool keep_with_call_p (const_rtx);
1898 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1899 extern int insn_rtx_cost (rtx, bool);
1900
1901 /* Given an insn and condition, return a canonical description of
1902 the test being made. */
1903 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1904
1905 /* Given a JUMP_INSN, return a canonical description of the test
1906 being made. */
1907 extern rtx get_condition (rtx, rtx *, int, int);
1908
1909 /* Information about a subreg of a hard register. */
1910 struct subreg_info
1911 {
1912 /* Offset of first hard register involved in the subreg. */
1913 int offset;
1914 /* Number of hard registers involved in the subreg. */
1915 int nregs;
1916 /* Whether this subreg can be represented as a hard reg with the new
1917 mode. */
1918 bool representable_p;
1919 };
1920
1921 extern void subreg_get_info (unsigned int, enum machine_mode,
1922 unsigned int, enum machine_mode,
1923 struct subreg_info *);
1924
1925 /* lists.c */
1926
1927 extern void free_EXPR_LIST_list (rtx *);
1928 extern void free_INSN_LIST_list (rtx *);
1929 extern void free_EXPR_LIST_node (rtx);
1930 extern void free_INSN_LIST_node (rtx);
1931 extern rtx alloc_INSN_LIST (rtx, rtx);
1932 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
1933 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1934 extern rtx remove_list_elem (rtx, rtx *);
1935 extern rtx remove_free_INSN_LIST_node (rtx *);
1936 extern rtx remove_free_EXPR_LIST_node (rtx *);
1937
1938
1939 /* reginfo.c */
1940
1941 /* Initialize may_move_cost and friends for mode M. */
1942 extern void init_move_cost (enum machine_mode);
1943 /* Resize reg info. */
1944 extern bool resize_reg_info (void);
1945 /* Free up register info memory. */
1946 extern void free_reg_info (void);
1947 extern void init_subregs_of_mode (void);
1948 extern void finish_subregs_of_mode (void);
1949
1950 /* recog.c */
1951 extern rtx extract_asm_operands (rtx);
1952 extern int asm_noperands (const_rtx);
1953 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1954 enum machine_mode *, location_t *);
1955
1956 extern enum reg_class reg_preferred_class (int);
1957 extern enum reg_class reg_alternate_class (int);
1958 extern enum reg_class reg_cover_class (int);
1959 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1960 enum reg_class);
1961
1962 extern void split_all_insns (void);
1963 extern unsigned int split_all_insns_noflow (void);
1964
1965 #define MAX_SAVED_CONST_INT 64
1966 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1967
1968 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
1969 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
1970 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
1971 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
1972 extern GTY(()) rtx const_true_rtx;
1973
1974 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1975
1976 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
1977 same as VOIDmode. */
1978
1979 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1980
1981 /* Likewise, for the constants 1 and 2. */
1982
1983 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1984 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1985
1986 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1987 is used to represent the frame pointer. This is because the
1988 hard frame pointer and the automatic variables are separated by an amount
1989 that cannot be determined until after register allocation. We can assume
1990 that in this case ELIMINABLE_REGS will be defined, one action of which
1991 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
1992 #ifndef HARD_FRAME_POINTER_REGNUM
1993 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1994 #endif
1995
1996 /* Index labels for global_rtl. */
1997 enum global_rtl_index
1998 {
1999 GR_PC,
2000 GR_CC0,
2001 GR_STACK_POINTER,
2002 GR_FRAME_POINTER,
2003 /* For register elimination to work properly these hard_frame_pointer_rtx,
2004 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2005 the same register. */
2006 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2007 GR_ARG_POINTER = GR_FRAME_POINTER,
2008 #endif
2009 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
2010 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2011 #else
2012 GR_HARD_FRAME_POINTER,
2013 #endif
2014 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2015 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2016 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2017 #else
2018 GR_ARG_POINTER,
2019 #endif
2020 #endif
2021 GR_VIRTUAL_INCOMING_ARGS,
2022 GR_VIRTUAL_STACK_ARGS,
2023 GR_VIRTUAL_STACK_DYNAMIC,
2024 GR_VIRTUAL_OUTGOING_ARGS,
2025 GR_VIRTUAL_CFA,
2026
2027 GR_MAX
2028 };
2029
2030 /* Pointers to standard pieces of rtx are stored here. */
2031 extern GTY(()) rtx global_rtl[GR_MAX];
2032
2033 /* Standard pieces of rtx, to be substituted directly into things. */
2034 #define pc_rtx (global_rtl[GR_PC])
2035 #define cc0_rtx (global_rtl[GR_CC0])
2036
2037 /* All references to certain hard regs, except those created
2038 by allocating pseudo regs into them (when that's possible),
2039 go through these unique rtx objects. */
2040 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2041 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2042 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2043 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2044
2045 extern GTY(()) rtx pic_offset_table_rtx;
2046 extern GTY(()) rtx return_address_pointer_rtx;
2047
2048 /* Include the RTL generation functions. */
2049
2050 #ifndef GENERATOR_FILE
2051 #include "genrtl.h"
2052 #undef gen_rtx_ASM_INPUT
2053 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2054 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2055 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2056 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2057 #endif
2058
2059 /* There are some RTL codes that require special attention; the
2060 generation functions included above do the raw handling. If you
2061 add to this list, modify special_rtx in gengenrtl.c as well. */
2062
2063 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2064 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2065 extern rtx gen_raw_REG (enum machine_mode, int);
2066 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2067 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2068 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2069
2070 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2071
2072 /* Virtual registers are used during RTL generation to refer to locations into
2073 the stack frame when the actual location isn't known until RTL generation
2074 is complete. The routine instantiate_virtual_regs replaces these with
2075 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2076 a constant. */
2077
2078 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2079
2080 /* This points to the first word of the incoming arguments passed on the stack,
2081 either by the caller or by the callee when pretending it was passed by the
2082 caller. */
2083
2084 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2085
2086 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2087
2088 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2089 variable on the stack. Otherwise, it points to the first variable on
2090 the stack. */
2091
2092 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2093
2094 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2095
2096 /* This points to the location of dynamically-allocated memory on the stack
2097 immediately after the stack pointer has been adjusted by the amount
2098 desired. */
2099
2100 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2101
2102 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2103
2104 /* This points to the location in the stack at which outgoing arguments should
2105 be written when the stack is pre-pushed (arguments pushed using push
2106 insns always use sp). */
2107
2108 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2109
2110 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2111
2112 /* This points to the Canonical Frame Address of the function. This
2113 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2114 but is calculated relative to the arg pointer for simplicity; the
2115 frame pointer nor stack pointer are necessarily fixed relative to
2116 the CFA until after reload. */
2117
2118 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2119
2120 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2121
2122 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2123
2124 /* Nonzero if REGNUM is a pointer into the stack frame. */
2125 #define REGNO_PTR_FRAME_P(REGNUM) \
2126 ((REGNUM) == STACK_POINTER_REGNUM \
2127 || (REGNUM) == FRAME_POINTER_REGNUM \
2128 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2129 || (REGNUM) == ARG_POINTER_REGNUM \
2130 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2131 && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2132
2133 /* REGNUM never really appearing in the INSN stream. */
2134 #define INVALID_REGNUM (~(unsigned int) 0)
2135
2136 extern rtx output_constant_def (tree, int);
2137 extern rtx lookup_constant_def (tree);
2138
2139 /* Nonzero after end of reload pass.
2140 Set to 1 or 0 by reload1.c. */
2141
2142 extern int reload_completed;
2143
2144 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2145 extern int epilogue_completed;
2146
2147 /* Set to 1 while reload_as_needed is operating.
2148 Required by some machines to handle any generated moves differently. */
2149
2150 extern int reload_in_progress;
2151
2152 /* This macro indicates whether you may create a new
2153 pseudo-register. */
2154
2155 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2156
2157 #ifdef STACK_REGS
2158 /* Nonzero after end of regstack pass.
2159 Set to 1 or 0 by reg-stack.c. */
2160 extern int regstack_completed;
2161 #endif
2162
2163 /* If this is nonzero, we do not bother generating VOLATILE
2164 around volatile memory references, and we are willing to
2165 output indirect addresses. If cse is to follow, we reject
2166 indirect addresses so a useful potential cse is generated;
2167 if it is used only once, instruction combination will produce
2168 the same indirect address eventually. */
2169 extern int cse_not_expected;
2170
2171 /* Translates rtx code to tree code, for those codes needed by
2172 REAL_ARITHMETIC. The function returns an int because the caller may not
2173 know what `enum tree_code' means. */
2174
2175 extern int rtx_to_tree_code (enum rtx_code);
2176
2177 /* In cse.c */
2178 extern int delete_trivially_dead_insns (rtx, int);
2179 extern int cse_main (rtx, int);
2180 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2181 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2182
2183 /* In jump.c */
2184 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2185 extern int condjump_p (const_rtx);
2186 extern int any_condjump_p (const_rtx);
2187 extern int any_uncondjump_p (const_rtx);
2188 extern rtx pc_set (const_rtx);
2189 extern rtx condjump_label (const_rtx);
2190 extern int simplejump_p (const_rtx);
2191 extern int returnjump_p (rtx);
2192 extern int eh_returnjump_p (rtx);
2193 extern int onlyjump_p (const_rtx);
2194 extern int only_sets_cc0_p (const_rtx);
2195 extern int sets_cc0_p (const_rtx);
2196 extern int invert_jump_1 (rtx, rtx);
2197 extern int invert_jump (rtx, rtx, int);
2198 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2199 extern int true_regnum (const_rtx);
2200 extern unsigned int reg_or_subregno (const_rtx);
2201 extern int redirect_jump_1 (rtx, rtx);
2202 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2203 extern int redirect_jump (rtx, rtx, int);
2204 extern void rebuild_jump_labels (rtx);
2205 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2206 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2207 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2208 const_rtx, const_rtx);
2209 extern void delete_for_peephole (rtx, rtx);
2210 extern int condjump_in_parallel_p (const_rtx);
2211
2212 /* In emit-rtl.c. */
2213 extern int max_reg_num (void);
2214 extern int max_label_num (void);
2215 extern int get_first_label_num (void);
2216 extern void maybe_set_first_label_num (rtx);
2217 extern void delete_insns_since (rtx);
2218 extern void mark_reg_pointer (rtx, int);
2219 extern void mark_user_reg (rtx);
2220 extern void reset_used_flags (rtx);
2221 extern void set_used_flags (rtx);
2222 extern void reorder_insns (rtx, rtx, rtx);
2223 extern void reorder_insns_nobb (rtx, rtx, rtx);
2224 extern int get_max_uid (void);
2225 extern int get_max_insn_count (void);
2226 extern int in_sequence_p (void);
2227 extern void force_next_line_note (void);
2228 extern void init_emit (void);
2229 extern void init_emit_regs (void);
2230 extern void init_emit_once (void);
2231 extern void push_topmost_sequence (void);
2232 extern void pop_topmost_sequence (void);
2233 extern void set_new_first_and_last_insn (rtx, rtx);
2234 extern unsigned int unshare_all_rtl (void);
2235 extern void unshare_all_rtl_again (rtx);
2236 extern void unshare_all_rtl_in_chain (rtx);
2237 extern void verify_rtl_sharing (void);
2238 extern void set_first_insn (rtx);
2239 extern void set_last_insn (rtx);
2240 extern void link_cc0_insns (rtx);
2241 extern void add_insn (rtx);
2242 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2243 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2244 extern void remove_insn (rtx);
2245 extern rtx emit (rtx);
2246 extern rtx delete_insn (rtx);
2247 extern rtx entry_of_function (void);
2248 extern void emit_insn_at_entry (rtx);
2249 extern void delete_insn_chain (rtx, rtx, bool);
2250 extern rtx unlink_insn_chain (rtx, rtx);
2251 extern rtx delete_insn_and_edges (rtx);
2252 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2253 extern rtx gen_const_mem (enum machine_mode, rtx);
2254 extern rtx gen_frame_mem (enum machine_mode, rtx);
2255 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2256 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2257 const_rtx, unsigned int);
2258
2259 /* In combine.c */
2260 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2261 extern rtx remove_death (unsigned int, rtx);
2262 extern void dump_combine_stats (FILE *);
2263 extern void dump_combine_total_stats (FILE *);
2264
2265 /* In cfgcleanup.c */
2266 extern void delete_dead_jumptables (void);
2267
2268 /* In sched-vis.c. */
2269 extern void debug_bb_n_slim (int);
2270 extern void debug_bb_slim (struct basic_block_def *);
2271 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2272 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2273 extern void dump_insn_slim (FILE *f, rtx x);
2274 extern void debug_insn_slim (rtx x);
2275
2276 /* In sched-rgn.c. */
2277 extern void schedule_insns (void);
2278
2279 /* In sched-ebb.c. */
2280 extern void schedule_ebbs (void);
2281
2282 /* In haifa-sched.c. */
2283 extern void fix_sched_param (const char *, const char *);
2284
2285 /* In sel-sched-dump.c. */
2286 extern void sel_sched_fix_param (const char *param, const char *val);
2287
2288 /* In print-rtl.c */
2289 extern const char *print_rtx_head;
2290 extern void debug_rtx (const_rtx);
2291 extern void debug_rtx_list (const_rtx, int);
2292 extern void debug_rtx_range (const_rtx, const_rtx);
2293 extern const_rtx debug_rtx_find (const_rtx, int);
2294 extern void print_mem_expr (FILE *, const_tree);
2295 extern void print_rtl (FILE *, const_rtx);
2296 extern void print_simple_rtl (FILE *, const_rtx);
2297 extern int print_rtl_single (FILE *, const_rtx);
2298 extern void print_inline_rtx (FILE *, const_rtx, int);
2299
2300 /* In function.c */
2301 extern void reposition_prologue_and_epilogue_notes (void);
2302 extern int prologue_epilogue_contains (const_rtx);
2303 extern int sibcall_epilogue_contains (const_rtx);
2304 extern void mark_temp_addr_taken (rtx);
2305 extern void update_temp_slot_address (rtx, rtx);
2306 extern void maybe_copy_epilogue_insn (rtx, rtx);
2307
2308 /* In stmt.c */
2309 extern void expand_null_return (void);
2310 extern void expand_naked_return (void);
2311 extern void emit_jump (rtx);
2312
2313 /* In expr.c */
2314 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2315 unsigned int, int);
2316
2317 /* In cfgrtl.c */
2318 extern void print_rtl_with_bb (FILE *, const_rtx);
2319
2320 /* In cfg.c. */
2321 extern void dump_reg_info (FILE *);
2322 extern void dump_flow_info (FILE *, int);
2323
2324 /* In expmed.c */
2325 extern void init_expmed (void);
2326 extern void expand_inc (rtx, rtx);
2327 extern void expand_dec (rtx, rtx);
2328
2329 /* In gcse.c */
2330 extern bool can_copy_p (enum machine_mode);
2331 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2332 extern rtx fis_get_condition (rtx);
2333
2334 /* In ira.c */
2335 #ifdef HARD_CONST
2336 extern HARD_REG_SET eliminable_regset;
2337 #endif
2338 extern void mark_elimination (int, int);
2339
2340 /* In reginfo.c */
2341 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2342 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2343 extern void globalize_reg (int);
2344 extern void init_reg_modes_target (void);
2345 extern void init_regs (void);
2346 extern void reinit_regs (void);
2347 extern void init_fake_stack_mems (void);
2348 extern void save_register_info (void);
2349 extern void init_reg_sets (void);
2350 extern void regclass (rtx, int);
2351 extern void reg_scan (rtx, unsigned int);
2352 extern void fix_register (const char *, int, int);
2353 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2354 enum machine_mode);
2355
2356 /* In reorg.c */
2357 extern void dbr_schedule (rtx);
2358
2359 /* In reload1.c */
2360 extern int function_invariant_p (const_rtx);
2361
2362 /* In calls.c */
2363 enum libcall_type
2364 {
2365 LCT_NORMAL = 0,
2366 LCT_CONST = 1,
2367 LCT_PURE = 2,
2368 LCT_NORETURN = 3,
2369 LCT_THROW = 4,
2370 LCT_RETURNS_TWICE = 5
2371 };
2372
2373 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2374 ...);
2375 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2376 enum machine_mode, int, ...);
2377
2378 /* In varasm.c */
2379 extern void init_varasm_once (void);
2380 extern enum tls_model decl_default_tls_model (const_tree);
2381
2382 extern rtx make_debug_expr_from_rtl (const_rtx);
2383
2384 /* In rtl.c */
2385 extern void traverse_md_constants (int (*) (void **, void *), void *);
2386 struct md_constant { char *name, *value; };
2387
2388 /* In read-rtl.c */
2389 extern int read_skip_spaces (FILE *);
2390 extern bool read_rtx (FILE *, rtx *, int *);
2391 extern void copy_rtx_ptr_loc (const void *, const void *);
2392 extern void print_rtx_ptr_loc (const void *);
2393 extern const char *join_c_conditions (const char *, const char *);
2394 extern void print_c_condition (const char *);
2395 extern const char *read_rtx_filename;
2396 extern int read_rtx_lineno;
2397
2398 /* In alias.c */
2399 extern rtx canon_rtx (rtx);
2400 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2401 extern rtx get_addr (rtx);
2402 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2403 rtx, bool (*)(const_rtx, bool));
2404 extern int read_dependence (const_rtx, const_rtx);
2405 extern int anti_dependence (const_rtx, const_rtx);
2406 extern int output_dependence (const_rtx, const_rtx);
2407 extern void init_alias_target (void);
2408 extern void init_alias_analysis (void);
2409 extern void end_alias_analysis (void);
2410 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2411 extern rtx find_base_term (rtx);
2412 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2413 extern rtx get_reg_known_value (unsigned int);
2414 extern bool get_reg_known_equiv_p (unsigned int);
2415
2416 #ifdef STACK_REGS
2417 extern int stack_regs_mentioned (const_rtx insn);
2418 #endif
2419
2420 /* In toplev.c */
2421 extern GTY(()) rtx stack_limit_rtx;
2422
2423 /* In predict.c */
2424 extern void invert_br_probabilities (rtx);
2425 extern bool expensive_function_p (int);
2426
2427 /* In var-tracking.c */
2428 extern unsigned int variable_tracking_main (void);
2429
2430 /* In stor-layout.c. */
2431 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2432 rtx *, rtx *);
2433
2434 /* In loop-unswitch.c */
2435 extern rtx reversed_condition (rtx);
2436 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2437
2438 /* In loop-iv.c */
2439 extern rtx canon_condition (rtx);
2440 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2441
2442 /* In final.c */
2443 extern unsigned int compute_alignments (void);
2444 extern int asm_str_count (const char *templ);
2445 \f
2446 struct rtl_hooks
2447 {
2448 rtx (*gen_lowpart) (enum machine_mode, rtx);
2449 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2450 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2451 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2452 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2453 unsigned int, unsigned int *);
2454 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2455
2456 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2457 };
2458
2459 /* Each pass can provide its own. */
2460 extern struct rtl_hooks rtl_hooks;
2461
2462 /* ... but then it has to restore these. */
2463 extern const struct rtl_hooks general_rtl_hooks;
2464
2465 /* Keep this for the nonce. */
2466 #define gen_lowpart rtl_hooks.gen_lowpart
2467
2468 extern void insn_locators_alloc (void);
2469 extern void insn_locators_free (void);
2470 extern void insn_locators_finalize (void);
2471 extern void set_curr_insn_source_location (location_t);
2472 extern location_t get_curr_insn_source_location (void);
2473 extern void set_curr_insn_block (tree);
2474 extern tree get_curr_insn_block (void);
2475 extern int curr_insn_locator (void);
2476 extern bool optimize_insn_for_size_p (void);
2477 extern bool optimize_insn_for_speed_p (void);
2478
2479 #endif /* ! GCC_RTL_H */
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