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re PR middle-end/49310 (Compile time hog in var-tracking emit)
[gcc.git] / gcc / rtl.h
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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 #include "hashtab.h"
34
35 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */
36 #undef FLOAT /* Likewise. */
37 #undef ABS /* Likewise. */
38 #undef PC /* Likewise. */
39
40 /* Value used by some passes to "recognize" noop moves as valid
41 instructions. */
42 #define NOOP_MOVE_INSN_CODE INT_MAX
43
44 /* Register Transfer Language EXPRESSIONS CODES */
45
46 #define RTX_CODE enum rtx_code
47 enum rtx_code {
48
49 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
50 #include "rtl.def" /* rtl expressions are documented here */
51 #undef DEF_RTL_EXPR
52
53 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
54 NUM_RTX_CODE.
55 Assumes default enum value assignment. */
56
57 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
58 /* The cast here, saves many elsewhere. */
59
60 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
61
62 enum rtx_class {
63 /* We check bit 0-1 of some rtx class codes in the predicates below. */
64
65 /* Bit 0 = comparison if 0, arithmetic is 1
66 Bit 1 = 1 if commutative. */
67 RTX_COMPARE, /* 0 */
68 RTX_COMM_COMPARE,
69 RTX_BIN_ARITH,
70 RTX_COMM_ARITH,
71
72 /* Must follow the four preceding values. */
73 RTX_UNARY, /* 4 */
74
75 RTX_EXTRA,
76 RTX_MATCH,
77 RTX_INSN,
78
79 /* Bit 0 = 1 if constant. */
80 RTX_OBJ, /* 8 */
81 RTX_CONST_OBJ,
82
83 RTX_TERNARY,
84 RTX_BITFIELD_OPS,
85 RTX_AUTOINC
86 };
87
88 #define RTX_OBJ_MASK (~1)
89 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
90 #define RTX_COMPARE_MASK (~1)
91 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
92 #define RTX_ARITHMETIC_MASK (~1)
93 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
94 #define RTX_BINARY_MASK (~3)
95 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
96 #define RTX_COMMUTATIVE_MASK (~2)
97 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
98 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
99
100 extern const unsigned char rtx_length[NUM_RTX_CODE];
101 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
102
103 extern const char * const rtx_name[NUM_RTX_CODE];
104 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
105
106 extern const char * const rtx_format[NUM_RTX_CODE];
107 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
108
109 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
110 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
111
112 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
113 extern const unsigned char rtx_next[NUM_RTX_CODE];
114 \f
115 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
116 relative to which the offsets are calculated, as explained in rtl.def. */
117 typedef struct
118 {
119 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
120 unsigned min_align: 8;
121 /* Flags: */
122 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
123 unsigned min_after_vec: 1; /* minimum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned max_after_vec: 1; /* maximum address target label is
126 after the ADDR_DIFF_VEC. */
127 unsigned min_after_base: 1; /* minimum address target label is
128 after BASE. */
129 unsigned max_after_base: 1; /* maximum address target label is
130 after BASE. */
131 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
132 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
133 unsigned : 2;
134 unsigned scale : 8;
135 } addr_diff_vec_flags;
136
137 /* Structure used to describe the attributes of a MEM. These are hashed
138 so MEMs that the same attributes share a data structure. This means
139 they cannot be modified in place. */
140 typedef struct GTY(()) mem_attrs
141 {
142 /* The expression that the MEM accesses, or null if not known.
143 This expression might be larger than the memory reference itself.
144 (In other words, the MEM might access only part of the object.) */
145 tree expr;
146
147 /* The offset of the memory reference from the start of EXPR.
148 Only valid if OFFSET_KNOWN_P. */
149 HOST_WIDE_INT offset;
150
151 /* The size of the memory reference in bytes. Only valid if
152 SIZE_KNOWN_P. */
153 HOST_WIDE_INT size;
154
155 /* The alias set of the memory reference. */
156 alias_set_type alias;
157
158 /* The alignment of the reference in bits. Always a multiple of
159 BITS_PER_UNIT. Note that EXPR may have a stricter alignment
160 than the memory reference itself. */
161 unsigned int align;
162
163 /* The address space that the memory reference uses. */
164 unsigned char addrspace;
165
166 /* True if OFFSET is known. */
167 bool offset_known_p;
168
169 /* True if SIZE is known. */
170 bool size_known_p;
171 } mem_attrs;
172
173 /* Structure used to describe the attributes of a REG in similar way as
174 mem_attrs does for MEM above. Note that the OFFSET field is calculated
175 in the same way as for mem_attrs, rather than in the same way as a
176 SUBREG_BYTE. For example, if a big-endian target stores a byte
177 object in the low part of a 4-byte register, the OFFSET field
178 will be -3 rather than 0. */
179
180 typedef struct GTY(()) reg_attrs {
181 tree decl; /* decl corresponding to REG. */
182 HOST_WIDE_INT offset; /* Offset from start of DECL. */
183 } reg_attrs;
184
185 /* Common union for an element of an rtx. */
186
187 union rtunion_def
188 {
189 int rt_int;
190 unsigned int rt_uint;
191 const char *rt_str;
192 rtx rt_rtx;
193 rtvec rt_rtvec;
194 enum machine_mode rt_type;
195 addr_diff_vec_flags rt_addr_diff_vec_flags;
196 struct cselib_val_struct *rt_cselib;
197 tree rt_tree;
198 struct basic_block_def *rt_bb;
199 mem_attrs *rt_mem;
200 reg_attrs *rt_reg;
201 struct constant_descriptor_rtx *rt_constant;
202 struct dw_cfi_struct *rt_cfi;
203 };
204 typedef union rtunion_def rtunion;
205
206 /* This structure remembers the position of a SYMBOL_REF within an
207 object_block structure. A SYMBOL_REF only provides this information
208 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
209 struct GTY(()) block_symbol {
210 /* The usual SYMBOL_REF fields. */
211 rtunion GTY ((skip)) fld[3];
212
213 /* The block that contains this object. */
214 struct object_block *block;
215
216 /* The offset of this object from the start of its block. It is negative
217 if the symbol has not yet been assigned an offset. */
218 HOST_WIDE_INT offset;
219 };
220
221 /* Describes a group of objects that are to be placed together in such
222 a way that their relative positions are known. */
223 struct GTY(()) object_block {
224 /* The section in which these objects should be placed. */
225 section *sect;
226
227 /* The alignment of the first object, measured in bits. */
228 unsigned int alignment;
229
230 /* The total size of the objects, measured in bytes. */
231 HOST_WIDE_INT size;
232
233 /* The SYMBOL_REFs for each object. The vector is sorted in
234 order of increasing offset and the following conditions will
235 hold for each element X:
236
237 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
238 !SYMBOL_REF_ANCHOR_P (X)
239 SYMBOL_REF_BLOCK (X) == [address of this structure]
240 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
241 VEC(rtx,gc) *objects;
242
243 /* All the anchor SYMBOL_REFs used to address these objects, sorted
244 in order of increasing offset, and then increasing TLS model.
245 The following conditions will hold for each element X in this vector:
246
247 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
248 SYMBOL_REF_ANCHOR_P (X)
249 SYMBOL_REF_BLOCK (X) == [address of this structure]
250 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
251 VEC(rtx,gc) *anchors;
252 };
253
254 /* RTL expression ("rtx"). */
255
256 struct GTY((chain_next ("RTX_NEXT (&%h)"),
257 chain_prev ("RTX_PREV (&%h)"), variable_size)) rtx_def {
258 /* The kind of expression this is. */
259 ENUM_BITFIELD(rtx_code) code: 16;
260
261 /* The kind of value the expression has. */
262 ENUM_BITFIELD(machine_mode) mode : 8;
263
264 /* 1 in a MEM if we should keep the alias set for this mem unchanged
265 when we access a component.
266 1 in a CALL_INSN if it is a sibling call.
267 1 in a SET that is for a return.
268 In a CODE_LABEL, part of the two-bit alternate entry field.
269 1 in a CONCAT is VAL_EXPR_IS_COPIED in var-tracking.c. */
270 unsigned int jump : 1;
271 /* In a CODE_LABEL, part of the two-bit alternate entry field.
272 1 in a MEM if it cannot trap.
273 1 in a CALL_INSN logically equivalent to
274 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
275 unsigned int call : 1;
276 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
277 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
278 1 in a SYMBOL_REF if it addresses something in the per-function
279 constants pool.
280 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
281 1 in a NOTE, or EXPR_LIST for a const call.
282 1 in a JUMP_INSN of an annulling branch.
283 1 in a CONCAT is VAL_EXPR_IS_CLOBBERED in var-tracking.c.
284 1 in a preserved VALUE is PRESERVED_VALUE_P in cselib.c. */
285 unsigned int unchanging : 1;
286 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
287 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
288 if it has been deleted.
289 1 in a REG expression if corresponds to a variable declared by the user,
290 0 for an internally generated temporary.
291 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
292 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
293 non-local label.
294 In a SYMBOL_REF, this flag is used for machine-specific purposes.
295 In a PREFETCH, this flag indicates that it should be considered a scheduling
296 barrier.
297 1 in a CONCAT is VAL_NEEDS_RESOLUTION in var-tracking.c. */
298 unsigned int volatil : 1;
299 /* 1 in a MEM referring to a field of an aggregate.
300 0 if the MEM was a variable or the result of a * operator in C;
301 1 if it was the result of a . or -> operator (on a struct) in C.
302 1 in a REG if the register is used only in exit code a loop.
303 1 in a SUBREG expression if was generated from a variable with a
304 promoted mode.
305 1 in a CODE_LABEL if the label is used for nonlocal gotos
306 and must not be deleted even if its count is zero.
307 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
308 together with the preceding insn. Valid only within sched.
309 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
310 from the target of a branch. Valid from reorg until end of compilation;
311 cleared before used. */
312 unsigned int in_struct : 1;
313 /* At the end of RTL generation, 1 if this rtx is used. This is used for
314 copying shared structure. See `unshare_all_rtl'.
315 In a REG, this is not needed for that purpose, and used instead
316 in `leaf_renumber_regs_insn'.
317 1 in a SYMBOL_REF, means that emit_library_call
318 has used it as the function.
319 1 in a CONCAT is VAL_HOLDS_TRACK_EXPR in var-tracking.c.
320 1 in a VALUE or DEBUG_EXPR is VALUE_RECURSED_INTO in var-tracking.c. */
321 unsigned int used : 1;
322 /* 1 in an INSN or a SET if this rtx is related to the call frame,
323 either changing how we compute the frame address or saving and
324 restoring registers in the prologue and epilogue.
325 1 in a REG or MEM if it is a pointer.
326 1 in a SYMBOL_REF if it addresses something in the per-function
327 constant string pool.
328 1 in a VALUE is VALUE_CHANGED in var-tracking.c. */
329 unsigned frame_related : 1;
330 /* 1 in a REG or PARALLEL that is the current function's return value.
331 1 in a MEM if it refers to a scalar.
332 1 in a SYMBOL_REF for a weak symbol.
333 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P.
334 1 in a CONCAT is VAL_EXPR_HAS_REVERSE in var-tracking.c.
335 1 in a VALUE or DEBUG_EXPR is NO_LOC_P in var-tracking.c. */
336 unsigned return_val : 1;
337
338 /* The first element of the operands of this rtx.
339 The number of operands and their types are controlled
340 by the `code' field, according to rtl.def. */
341 union u {
342 rtunion fld[1];
343 HOST_WIDE_INT hwint[1];
344 struct block_symbol block_sym;
345 struct real_value rv;
346 struct fixed_value fv;
347 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
348 };
349
350 /* The size in bytes of an rtx header (code, mode and flags). */
351 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
352
353 /* The size in bytes of an rtx with code CODE. */
354 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
355
356 #define NULL_RTX (rtx) 0
357
358 /* The "next" and "previous" RTX, relative to this one. */
359
360 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
361 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
362
363 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
364 */
365 #define RTX_PREV(X) ((INSN_P (X) \
366 || NOTE_P (X) \
367 || BARRIER_P (X) \
368 || LABEL_P (X)) \
369 && PREV_INSN (X) != NULL \
370 && NEXT_INSN (PREV_INSN (X)) == X \
371 ? PREV_INSN (X) : NULL)
372
373 /* Define macros to access the `code' field of the rtx. */
374
375 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
376 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
377
378 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
379 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
380
381 /* RTL vector. These appear inside RTX's when there is a need
382 for a variable number of things. The principle use is inside
383 PARALLEL expressions. */
384
385 struct GTY((variable_size)) rtvec_def {
386 int num_elem; /* number of elements */
387 rtx GTY ((length ("%h.num_elem"))) elem[1];
388 };
389
390 #define NULL_RTVEC (rtvec) 0
391
392 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
393 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
394
395 /* Predicate yielding nonzero iff X is an rtx for a register. */
396 #define REG_P(X) (GET_CODE (X) == REG)
397
398 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
399 #define MEM_P(X) (GET_CODE (X) == MEM)
400
401 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
402 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
403
404 /* Predicate yielding true iff X is an rtx for a double-int
405 or floating point constant. */
406 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
407
408 /* Predicate yielding nonzero iff X is a label insn. */
409 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
410
411 /* Predicate yielding nonzero iff X is a jump insn. */
412 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
413
414 /* Predicate yielding nonzero iff X is a call insn. */
415 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
416
417 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
418 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
419
420 /* Predicate yielding nonzero iff X is a debug note/insn. */
421 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
422
423 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
424 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
425
426 /* Nonzero if DEBUG_INSN_P may possibly hold. */
427 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
428
429 /* Predicate yielding nonzero iff X is a real insn. */
430 #define INSN_P(X) \
431 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
432
433 /* Predicate yielding nonzero iff X is a note insn. */
434 #define NOTE_P(X) (GET_CODE (X) == NOTE)
435
436 /* Predicate yielding nonzero iff X is a barrier insn. */
437 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
438
439 /* Predicate yielding nonzero iff X is a data for a jump table. */
440 #define JUMP_TABLE_DATA_P(INSN) \
441 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
442 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
443
444 /* Predicate yielding nonzero iff X is a return or simple_return. */
445 #define ANY_RETURN_P(X) \
446 (GET_CODE (X) == RETURN || GET_CODE (X) == SIMPLE_RETURN)
447
448 /* 1 if X is a unary operator. */
449
450 #define UNARY_P(X) \
451 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
452
453 /* 1 if X is a binary operator. */
454
455 #define BINARY_P(X) \
456 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
457
458 /* 1 if X is an arithmetic operator. */
459
460 #define ARITHMETIC_P(X) \
461 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
462 == RTX_ARITHMETIC_RESULT)
463
464 /* 1 if X is an arithmetic operator. */
465
466 #define COMMUTATIVE_ARITH_P(X) \
467 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
468
469 /* 1 if X is a commutative arithmetic operator or a comparison operator.
470 These two are sometimes selected together because it is possible to
471 swap the two operands. */
472
473 #define SWAPPABLE_OPERANDS_P(X) \
474 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
475 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
476 | (1 << RTX_COMPARE)))
477
478 /* 1 if X is a non-commutative operator. */
479
480 #define NON_COMMUTATIVE_P(X) \
481 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
482 == RTX_NON_COMMUTATIVE_RESULT)
483
484 /* 1 if X is a commutative operator on integers. */
485
486 #define COMMUTATIVE_P(X) \
487 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
488 == RTX_COMMUTATIVE_RESULT)
489
490 /* 1 if X is a relational operator. */
491
492 #define COMPARISON_P(X) \
493 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
494
495 /* 1 if X is a constant value that is an integer. */
496
497 #define CONSTANT_P(X) \
498 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
499
500 /* 1 if X can be used to represent an object. */
501 #define OBJECT_P(X) \
502 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
503
504 /* General accessor macros for accessing the fields of an rtx. */
505
506 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
507 /* The bit with a star outside the statement expr and an & inside is
508 so that N can be evaluated only once. */
509 #define RTL_CHECK1(RTX, N, C1) __extension__ \
510 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
511 const enum rtx_code _code = GET_CODE (_rtx); \
512 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
513 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
514 __FUNCTION__); \
515 if (GET_RTX_FORMAT(_code)[_n] != C1) \
516 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
517 __FUNCTION__); \
518 &_rtx->u.fld[_n]; }))
519
520 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
521 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
522 const enum rtx_code _code = GET_CODE (_rtx); \
523 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
524 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
525 __FUNCTION__); \
526 if (GET_RTX_FORMAT(_code)[_n] != C1 \
527 && GET_RTX_FORMAT(_code)[_n] != C2) \
528 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
529 __FUNCTION__); \
530 &_rtx->u.fld[_n]; }))
531
532 #define RTL_CHECKC1(RTX, N, C) __extension__ \
533 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
534 if (GET_CODE (_rtx) != (C)) \
535 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
536 __FUNCTION__); \
537 &_rtx->u.fld[_n]; }))
538
539 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
540 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
541 const enum rtx_code _code = GET_CODE (_rtx); \
542 if (_code != (C1) && _code != (C2)) \
543 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
544 __FUNCTION__); \
545 &_rtx->u.fld[_n]; }))
546
547 #define RTVEC_ELT(RTVEC, I) __extension__ \
548 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
549 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
550 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
551 __FUNCTION__); \
552 &_rtvec->elem[_i]; }))
553
554 #define XWINT(RTX, N) __extension__ \
555 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
556 const enum rtx_code _code = GET_CODE (_rtx); \
557 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
558 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
559 __FUNCTION__); \
560 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
561 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
562 __FUNCTION__); \
563 &_rtx->u.hwint[_n]; }))
564
565 #define XCWINT(RTX, N, C) __extension__ \
566 (*({ __typeof (RTX) const _rtx = (RTX); \
567 if (GET_CODE (_rtx) != (C)) \
568 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
569 __FUNCTION__); \
570 &_rtx->u.hwint[N]; }))
571
572 #define XCMWINT(RTX, N, C, M) __extension__ \
573 (*({ __typeof (RTX) const _rtx = (RTX); \
574 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
575 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
576 __LINE__, __FUNCTION__); \
577 &_rtx->u.hwint[N]; }))
578
579 #define XCNMPRV(RTX, C, M) __extension__ \
580 ({ __typeof (RTX) const _rtx = (RTX); \
581 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
582 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
583 __LINE__, __FUNCTION__); \
584 &_rtx->u.rv; })
585
586 #define XCNMPFV(RTX, C, M) __extension__ \
587 ({ __typeof (RTX) const _rtx = (RTX); \
588 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
589 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
590 __LINE__, __FUNCTION__); \
591 &_rtx->u.fv; })
592
593 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
594 ({ __typeof (RTX) const _symbol = (RTX); \
595 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
596 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
597 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
598 __FUNCTION__); \
599 &_symbol->u.block_sym; })
600
601 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
602 const char *)
603 ATTRIBUTE_NORETURN;
604 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
605 const char *)
606 ATTRIBUTE_NORETURN;
607 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
608 int, const char *)
609 ATTRIBUTE_NORETURN;
610 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
611 int, const char *)
612 ATTRIBUTE_NORETURN;
613 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
614 const char *, int, const char *)
615 ATTRIBUTE_NORETURN;
616 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
617 bool, const char *, int, const char *)
618 ATTRIBUTE_NORETURN;
619 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
620 ATTRIBUTE_NORETURN;
621 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
622 const char *)
623 ATTRIBUTE_NORETURN;
624
625 #else /* not ENABLE_RTL_CHECKING */
626
627 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
628 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
629 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
630 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
631 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
632 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
633 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
634 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
635 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
636 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
637 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
638 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
639
640 #endif
641
642 /* General accessor macros for accessing the flags of an rtx. */
643
644 /* Access an individual rtx flag, with no checking of any kind. */
645 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
646
647 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
648 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
649 ({ __typeof (RTX) const _rtx = (RTX); \
650 if (GET_CODE(_rtx) != C1) \
651 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
652 __FUNCTION__); \
653 _rtx; })
654
655 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
656 ({ __typeof (RTX) const _rtx = (RTX); \
657 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
658 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
659 __FUNCTION__); \
660 _rtx; })
661
662 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
663 ({ __typeof (RTX) const _rtx = (RTX); \
664 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
665 && GET_CODE(_rtx) != C3) \
666 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
667 __FUNCTION__); \
668 _rtx; })
669
670 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
671 ({ __typeof (RTX) const _rtx = (RTX); \
672 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
673 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
674 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
675 __FUNCTION__); \
676 _rtx; })
677
678 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
679 ({ __typeof (RTX) const _rtx = (RTX); \
680 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
681 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
682 && GET_CODE(_rtx) != C5) \
683 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
684 __FUNCTION__); \
685 _rtx; })
686
687 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
688 __extension__ \
689 ({ __typeof (RTX) const _rtx = (RTX); \
690 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
691 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
692 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
693 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
694 __FUNCTION__); \
695 _rtx; })
696
697 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
698 __extension__ \
699 ({ __typeof (RTX) const _rtx = (RTX); \
700 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
701 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
702 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
703 && GET_CODE(_rtx) != C7) \
704 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
705 __FUNCTION__); \
706 _rtx; })
707
708 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
709 __extension__ \
710 ({ __typeof (RTX) const _rtx = (RTX); \
711 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
712 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
713 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
714 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
715 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
716 __FUNCTION__); \
717 _rtx; })
718
719 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
720 int, const char *)
721 ATTRIBUTE_NORETURN
722 ;
723
724 #else /* not ENABLE_RTL_FLAG_CHECKING */
725
726 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
727 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
728 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
729 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
730 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
731 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
732 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
733 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
734 #endif
735
736 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
737 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
738 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
739 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
740 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
741 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
742 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
743 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
744 #define XCFI(RTX, N) (RTL_CHECK1 (RTX, N, 'C').rt_cfi)
745
746 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
747 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
748
749 /* These are like XINT, etc. except that they expect a '0' field instead
750 of the normal type code. */
751
752 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
753 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
754 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
755 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
756 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
757 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
758 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
759 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
760 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
761 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
762 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
763 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
764 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
765
766 /* Access a '0' field with any type. */
767 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
768
769 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
770 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
771 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
772 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
773 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
774 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
775 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
776 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
777 #define XCCFI(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cfi)
778 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
779
780 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
781 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
782
783 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
784 \f
785 /* ACCESS MACROS for particular fields of insns. */
786
787 /* Holds a unique number for each insn.
788 These are not necessarily sequentially increasing. */
789 #define INSN_UID(INSN) XINT (INSN, 0)
790
791 /* Chain insns together in sequence. */
792 #define PREV_INSN(INSN) XEXP (INSN, 1)
793 #define NEXT_INSN(INSN) XEXP (INSN, 2)
794
795 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
796
797 /* The body of an insn. */
798 #define PATTERN(INSN) XEXP (INSN, 4)
799
800 #define INSN_LOCATOR(INSN) XINT (INSN, 5)
801 /* LOCATION of an RTX if relevant. */
802 #define RTL_LOCATION(X) (INSN_P (X) ? \
803 locator_location (INSN_LOCATOR (X)) \
804 : UNKNOWN_LOCATION)
805 /* LOCATION of current INSN. */
806 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
807
808 /* Code number of instruction, from when it was recognized.
809 -1 means this instruction has not been recognized yet. */
810 #define INSN_CODE(INSN) XINT (INSN, 6)
811
812 #define RTX_FRAME_RELATED_P(RTX) \
813 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
814 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
815
816 /* 1 if RTX is an insn that has been deleted. */
817 #define INSN_DELETED_P(RTX) \
818 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
819 CALL_INSN, JUMP_INSN, \
820 CODE_LABEL, BARRIER, NOTE)->volatil)
821
822 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
823 TREE_READONLY. */
824 #define RTL_CONST_CALL_P(RTX) \
825 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
826
827 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
828 DECL_PURE_P. */
829 #define RTL_PURE_CALL_P(RTX) \
830 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
831
832 /* 1 if RTX is a call to a const or pure function. */
833 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
834 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
835
836 /* 1 if RTX is a call to a looping const or pure function. Built from
837 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
838 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
839 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
840
841 /* 1 if RTX is a call_insn for a sibling call. */
842 #define SIBLING_CALL_P(RTX) \
843 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
844
845 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
846 #define INSN_ANNULLED_BRANCH_P(RTX) \
847 (RTL_FLAG_CHECK1("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN)->unchanging)
848
849 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
850 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
851 executed if the branch is taken. For annulled branches with this bit
852 clear, the insn should be executed only if the branch is not taken. */
853 #define INSN_FROM_TARGET_P(RTX) \
854 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
855
856 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
857 See the comments for ADDR_DIFF_VEC in rtl.def. */
858 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
859
860 /* In a VALUE, the value cselib has assigned to RTX.
861 This is a "struct cselib_val_struct", see cselib.h. */
862 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
863
864 /* Holds a list of notes on what this insn does to various REGs.
865 It is a chain of EXPR_LIST rtx's, where the second operand is the
866 chain pointer and the first operand is the REG being described.
867 The mode field of the EXPR_LIST contains not a real machine mode
868 but a value from enum reg_note. */
869 #define REG_NOTES(INSN) XEXP(INSN, 7)
870
871 /* In an ENTRY_VALUE this is the DECL_INCOMING_RTL of the argument in
872 question. */
873 #define ENTRY_VALUE_EXP(RTX) (RTL_CHECKC1 (RTX, 0, ENTRY_VALUE).rt_rtx)
874
875 enum reg_note
876 {
877 #define DEF_REG_NOTE(NAME) NAME,
878 #include "reg-notes.def"
879 #undef DEF_REG_NOTE
880 REG_NOTE_MAX
881 };
882
883 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
884 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
885 #define PUT_REG_NOTE_KIND(LINK, KIND) \
886 PUT_MODE (LINK, (enum machine_mode) (KIND))
887
888 /* Names for REG_NOTE's in EXPR_LIST insn's. */
889
890 extern const char * const reg_note_name[];
891 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
892
893 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
894 USE and CLOBBER expressions.
895 USE expressions list the registers filled with arguments that
896 are passed to the function.
897 CLOBBER expressions document the registers explicitly clobbered
898 by this CALL_INSN.
899 Pseudo registers can not be mentioned in this list. */
900 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
901
902 /* The label-number of a code-label. The assembler label
903 is made from `L' and the label-number printed in decimal.
904 Label numbers are unique in a compilation. */
905 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
906
907 /* In a NOTE that is a line number, this is a string for the file name that the
908 line is in. We use the same field to record block numbers temporarily in
909 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
910 between ints and pointers if we use a different macro for the block number.)
911 */
912
913 /* Opaque data. */
914 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
915 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
916 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
917 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
918 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
919 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
920 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
921 #define NOTE_CFI(INSN) XCCFI (INSN, 4, NOTE)
922 #define NOTE_LABEL_NUMBER(INSN) XCINT (INSN, 4, NOTE)
923
924 /* In a NOTE that is a line number, this is the line number.
925 Other kinds of NOTEs are identified by negative numbers here. */
926 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
927
928 /* Nonzero if INSN is a note marking the beginning of a basic block. */
929 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
930 (GET_CODE (INSN) == NOTE \
931 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
932
933 /* Variable declaration and the location of a variable. */
934 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
935 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
936
937 /* Initialization status of the variable in the location. Status
938 can be unknown, uninitialized or initialized. See enumeration
939 type below. */
940 #define PAT_VAR_LOCATION_STATUS(PAT) \
941 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
942
943 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
944 #define NOTE_VAR_LOCATION_DECL(NOTE) \
945 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
946 #define NOTE_VAR_LOCATION_LOC(NOTE) \
947 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
948 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
949 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
950
951 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
952 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
953
954 /* Accessors for a tree-expanded var location debug insn. */
955 #define INSN_VAR_LOCATION_DECL(INSN) \
956 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
957 #define INSN_VAR_LOCATION_LOC(INSN) \
958 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
959 #define INSN_VAR_LOCATION_STATUS(INSN) \
960 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
961
962 /* Expand to the RTL that denotes an unknown variable location in a
963 DEBUG_INSN. */
964 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
965
966 /* Determine whether X is such an unknown location. */
967 #define VAR_LOC_UNKNOWN_P(X) \
968 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
969
970 /* 1 if RTX is emitted after a call, but it should take effect before
971 the call returns. */
972 #define NOTE_DURING_CALL_P(RTX) \
973 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
974
975 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
976 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
977
978 /* VAR_DECL/PARM_DECL DEBUG_IMPLICIT_PTR takes address of. */
979 #define DEBUG_IMPLICIT_PTR_DECL(RTX) XCTREE (RTX, 0, DEBUG_IMPLICIT_PTR)
980
981 /* PARM_DECL DEBUG_PARAMETER_REF references. */
982 #define DEBUG_PARAMETER_REF_DECL(RTX) XCTREE (RTX, 0, DEBUG_PARAMETER_REF)
983
984 /* Codes that appear in the NOTE_KIND field for kinds of notes
985 that are not line numbers. These codes are all negative.
986
987 Notice that we do not try to use zero here for any of
988 the special note codes because sometimes the source line
989 actually can be zero! This happens (for example) when we
990 are generating code for the per-translation-unit constructor
991 and destructor routines for some C++ translation unit. */
992
993 enum insn_note
994 {
995 #define DEF_INSN_NOTE(NAME) NAME,
996 #include "insn-notes.def"
997 #undef DEF_INSN_NOTE
998
999 NOTE_INSN_MAX
1000 };
1001
1002 /* Names for NOTE insn's other than line numbers. */
1003
1004 extern const char * const note_insn_name[NOTE_INSN_MAX];
1005 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1006 (note_insn_name[(NOTE_CODE)])
1007
1008 /* The name of a label, in case it corresponds to an explicit label
1009 in the input source code. */
1010 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1011
1012 /* In jump.c, each label contains a count of the number
1013 of LABEL_REFs that point at it, so unused labels can be deleted. */
1014 #define LABEL_NUSES(RTX) XCINT (RTX, 5, CODE_LABEL)
1015
1016 /* Labels carry a two-bit field composed of the ->jump and ->call
1017 bits. This field indicates whether the label is an alternate
1018 entry point, and if so, what kind. */
1019 enum label_kind
1020 {
1021 LABEL_NORMAL = 0, /* ordinary label */
1022 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1023 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1024 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1025 };
1026
1027 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1028
1029 /* Retrieve the kind of LABEL. */
1030 #define LABEL_KIND(LABEL) __extension__ \
1031 ({ __typeof (LABEL) const _label = (LABEL); \
1032 if (GET_CODE (_label) != CODE_LABEL) \
1033 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1034 __FUNCTION__); \
1035 (enum label_kind) ((_label->jump << 1) | _label->call); })
1036
1037 /* Set the kind of LABEL. */
1038 #define SET_LABEL_KIND(LABEL, KIND) do { \
1039 __typeof (LABEL) const _label = (LABEL); \
1040 const unsigned int _kind = (KIND); \
1041 if (GET_CODE (_label) != CODE_LABEL) \
1042 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1043 __FUNCTION__); \
1044 _label->jump = ((_kind >> 1) & 1); \
1045 _label->call = (_kind & 1); \
1046 } while (0)
1047
1048 #else
1049
1050 /* Retrieve the kind of LABEL. */
1051 #define LABEL_KIND(LABEL) \
1052 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1053
1054 /* Set the kind of LABEL. */
1055 #define SET_LABEL_KIND(LABEL, KIND) do { \
1056 rtx const _label = (LABEL); \
1057 const unsigned int _kind = (KIND); \
1058 _label->jump = ((_kind >> 1) & 1); \
1059 _label->call = (_kind & 1); \
1060 } while (0)
1061
1062 #endif /* rtl flag checking */
1063
1064 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1065
1066 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1067 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1068 be decremented and possibly the label can be deleted. */
1069 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1070
1071 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1072 goes through all the LABEL_REFs that jump to that label. The chain
1073 eventually winds up at the CODE_LABEL: it is circular. */
1074 #define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
1075 \f
1076 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1077 be used on RHS. Use SET_REGNO to change the value. */
1078 #define REGNO(RTX) (rhs_regno(RTX))
1079 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1080 #define SET_REGNO_RAW(RTX,N) (XCUINT (RTX, 0, REG) = N)
1081
1082 /* ORIGINAL_REGNO holds the number the register originally had; for a
1083 pseudo register turned into a hard reg this will hold the old pseudo
1084 register number. */
1085 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1086
1087 /* Force the REGNO macro to only be used on the lhs. */
1088 static inline unsigned int
1089 rhs_regno (const_rtx x)
1090 {
1091 return XCUINT (x, 0, REG);
1092 }
1093
1094
1095 /* 1 if RTX is a reg or parallel that is the current function's return
1096 value. */
1097 #define REG_FUNCTION_VALUE_P(RTX) \
1098 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1099
1100 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1101 #define REG_USERVAR_P(RTX) \
1102 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1103
1104 /* 1 if RTX is a reg that holds a pointer value. */
1105 #define REG_POINTER(RTX) \
1106 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1107
1108 /* 1 if RTX is a mem that holds a pointer value. */
1109 #define MEM_POINTER(RTX) \
1110 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1111
1112 /* 1 if the given register REG corresponds to a hard register. */
1113 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1114
1115 /* 1 if the given register number REG_NO corresponds to a hard register. */
1116 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1117
1118 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1119 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1120 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1121
1122 /* For a CONST_DOUBLE:
1123 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1124 low-order word and ..._HIGH the high-order.
1125 For a float, there is a REAL_VALUE_TYPE structure, and
1126 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1127 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1128 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1129 #define CONST_DOUBLE_REAL_VALUE(r) \
1130 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1131
1132 #define CONST_FIXED_VALUE(r) \
1133 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1134 #define CONST_FIXED_VALUE_HIGH(r) \
1135 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1136 #define CONST_FIXED_VALUE_LOW(r) \
1137 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1138
1139 /* For a CONST_VECTOR, return element #n. */
1140 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1141
1142 /* For a CONST_VECTOR, return the number of elements in a vector. */
1143 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1144
1145 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1146 SUBREG_BYTE extracts the byte-number. */
1147
1148 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1149 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1150
1151 /* in rtlanal.c */
1152 /* Return the right cost to give to an operation
1153 to make the cost of the corresponding register-to-register instruction
1154 N times that of a fast register-to-register instruction. */
1155 #define COSTS_N_INSNS(N) ((N) * 4)
1156
1157 /* Maximum cost of an rtl expression. This value has the special meaning
1158 not to use an rtx with this cost under any circumstances. */
1159 #define MAX_COST INT_MAX
1160
1161 /* A structure to hold all available cost information about an rtl
1162 expression. */
1163 struct full_rtx_costs
1164 {
1165 int speed;
1166 int size;
1167 };
1168
1169 /* Initialize a full_rtx_costs structure C to the maximum cost. */
1170 static inline void
1171 init_costs_to_max (struct full_rtx_costs *c)
1172 {
1173 c->speed = MAX_COST;
1174 c->size = MAX_COST;
1175 }
1176
1177 /* Initialize a full_rtx_costs structure C to zero cost. */
1178 static inline void
1179 init_costs_to_zero (struct full_rtx_costs *c)
1180 {
1181 c->speed = 0;
1182 c->size = 0;
1183 }
1184
1185 /* Compare two full_rtx_costs structures A and B, returning true
1186 if A < B when optimizing for speed. */
1187 static inline bool
1188 costs_lt_p (struct full_rtx_costs *a, struct full_rtx_costs *b,
1189 bool speed)
1190 {
1191 if (speed)
1192 return (a->speed < b->speed
1193 || (a->speed == b->speed && a->size < b->size));
1194 else
1195 return (a->size < b->size
1196 || (a->size == b->size && a->speed < b->speed));
1197 }
1198
1199 /* Increase both members of the full_rtx_costs structure C by the
1200 cost of N insns. */
1201 static inline void
1202 costs_add_n_insns (struct full_rtx_costs *c, int n)
1203 {
1204 c->speed += COSTS_N_INSNS (n);
1205 c->size += COSTS_N_INSNS (n);
1206 }
1207
1208 extern void init_rtlanal (void);
1209 extern int rtx_cost (rtx, enum rtx_code, int, bool);
1210 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1211 extern void get_full_rtx_cost (rtx, enum rtx_code, int,
1212 struct full_rtx_costs *);
1213 extern unsigned int subreg_lsb (const_rtx);
1214 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1215 unsigned int);
1216 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1217 unsigned int, enum machine_mode);
1218 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1219 unsigned int, enum machine_mode);
1220 extern unsigned int subreg_regno (const_rtx);
1221 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1222 unsigned int, enum machine_mode);
1223 extern unsigned int subreg_nregs (const_rtx);
1224 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1225 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1226 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1227 extern bool constant_pool_constant_p (rtx);
1228 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1229 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1230
1231 #ifndef GENERATOR_FILE
1232 /* Return the cost of SET X. SPEED_P is true if optimizing for speed
1233 rather than size. */
1234
1235 static inline int
1236 set_rtx_cost (rtx x, bool speed_p)
1237 {
1238 return rtx_cost (x, INSN, 4, speed_p);
1239 }
1240
1241 /* Like set_rtx_cost, but return both the speed and size costs in C. */
1242
1243 static inline void
1244 get_full_set_rtx_cost (rtx x, struct full_rtx_costs *c)
1245 {
1246 get_full_rtx_cost (x, INSN, 4, c);
1247 }
1248
1249 /* Return the cost of moving X into a register, relative to the cost
1250 of a register move. SPEED_P is true if optimizing for speed rather
1251 than size. */
1252
1253 static inline int
1254 set_src_cost (rtx x, bool speed_p)
1255 {
1256 return rtx_cost (x, SET, 1, speed_p);
1257 }
1258
1259 /* Like set_src_cost, but return both the speed and size costs in C. */
1260
1261 static inline void
1262 get_full_set_src_cost (rtx x, struct full_rtx_costs *c)
1263 {
1264 get_full_rtx_cost (x, SET, 1, c);
1265 }
1266 #endif
1267
1268 /* 1 if RTX is a subreg containing a reg that is already known to be
1269 sign- or zero-extended from the mode of the subreg to the mode of
1270 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1271 extension.
1272
1273 When used as a LHS, is means that this extension must be done
1274 when assigning to SUBREG_REG. */
1275
1276 #define SUBREG_PROMOTED_VAR_P(RTX) \
1277 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1278
1279 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1280 do { \
1281 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1282 if ((VAL) < 0) \
1283 _rtx->volatil = 1; \
1284 else { \
1285 _rtx->volatil = 0; \
1286 _rtx->unchanging = (VAL); \
1287 } \
1288 } while (0)
1289
1290 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1291 this gives the necessary extensions:
1292 0 - signed
1293 1 - normal unsigned
1294 -1 - pointer unsigned, which most often can be handled like unsigned
1295 extension, except for generating instructions where we need to
1296 emit special code (ptr_extend insns) on some architectures. */
1297
1298 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1299 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1300 ? -1 : (int) (RTX)->unchanging)
1301
1302 /* Access various components of an ASM_OPERANDS rtx. */
1303
1304 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1305 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1306 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1307 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1308 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1309 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1310 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1311 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1312 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1313 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1314 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1315 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1316 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1317 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1318 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1319 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1320 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1321 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1322
1323 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1324 #define MEM_READONLY_P(RTX) \
1325 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1326
1327 /* 1 if RTX is a mem and we should keep the alias set for this mem
1328 unchanged when we access a component. Set to 1, or example, when we
1329 are already in a non-addressable component of an aggregate. */
1330 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1331 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1332
1333 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1334 #define MEM_VOLATILE_P(RTX) \
1335 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1336 ASM_INPUT)->volatil)
1337
1338 /* 1 if RTX is a mem that refers to an aggregate, either to the
1339 aggregate itself or to a field of the aggregate. If zero, RTX may
1340 or may not be such a reference. */
1341 #define MEM_IN_STRUCT_P(RTX) \
1342 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1343
1344 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may
1345 not refer to a scalar. */
1346 #define MEM_SCALAR_P(RTX) \
1347 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1348
1349 /* 1 if RTX is a mem that cannot trap. */
1350 #define MEM_NOTRAP_P(RTX) \
1351 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1352
1353 /* The memory attribute block. We provide access macros for each value
1354 in the block and provide defaults if none specified. */
1355 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1356
1357 /* The register attribute block. We provide access macros for each value
1358 in the block and provide defaults if none specified. */
1359 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1360
1361 #ifndef GENERATOR_FILE
1362 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1363 set, and may alias anything. Otherwise, the MEM can only alias
1364 MEMs in a conflicting alias set. This value is set in a
1365 language-dependent manner in the front-end, and should not be
1366 altered in the back-end. These set numbers are tested with
1367 alias_sets_conflict_p. */
1368 #define MEM_ALIAS_SET(RTX) (get_mem_attrs (RTX)->alias)
1369
1370 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1371 refer to part of a DECL. It may also be a COMPONENT_REF. */
1372 #define MEM_EXPR(RTX) (get_mem_attrs (RTX)->expr)
1373
1374 /* For a MEM rtx, true if its MEM_OFFSET is known. */
1375 #define MEM_OFFSET_KNOWN_P(RTX) (get_mem_attrs (RTX)->offset_known_p)
1376
1377 /* For a MEM rtx, the offset from the start of MEM_EXPR. */
1378 #define MEM_OFFSET(RTX) (get_mem_attrs (RTX)->offset)
1379
1380 /* For a MEM rtx, the address space. */
1381 #define MEM_ADDR_SPACE(RTX) (get_mem_attrs (RTX)->addrspace)
1382
1383 /* For a MEM rtx, true if its MEM_SIZE is known. */
1384 #define MEM_SIZE_KNOWN_P(RTX) (get_mem_attrs (RTX)->size_known_p)
1385
1386 /* For a MEM rtx, the size in bytes of the MEM. */
1387 #define MEM_SIZE(RTX) (get_mem_attrs (RTX)->size)
1388
1389 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1390 mode as a default when STRICT_ALIGNMENT, but not if not. */
1391 #define MEM_ALIGN(RTX) (get_mem_attrs (RTX)->align)
1392 #else
1393 #define MEM_ADDR_SPACE(RTX) ADDR_SPACE_GENERIC
1394 #endif
1395
1396 /* For a REG rtx, the decl it is known to refer to, if it is known to
1397 refer to part of a DECL. */
1398 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1399
1400 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1401 HOST_WIDE_INT. */
1402 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1403
1404 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1405 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1406 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1407 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
1408 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
1409 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1410 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1411 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1412 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1413 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1414
1415 /* 1 if RTX is a label_ref for a nonlocal label. */
1416 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1417 REG_LABEL_TARGET note. */
1418 #define LABEL_REF_NONLOCAL_P(RTX) \
1419 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1420
1421 /* 1 if RTX is a code_label that should always be considered to be needed. */
1422 #define LABEL_PRESERVE_P(RTX) \
1423 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1424
1425 /* During sched, 1 if RTX is an insn that must be scheduled together
1426 with the preceding insn. */
1427 #define SCHED_GROUP_P(RTX) \
1428 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1429 JUMP_INSN, CALL_INSN \
1430 )->in_struct)
1431
1432 /* For a SET rtx, SET_DEST is the place that is set
1433 and SET_SRC is the value it is set to. */
1434 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1435 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1436 #define SET_IS_RETURN_P(RTX) \
1437 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1438
1439 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1440 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1441 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1442
1443 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1444 conditionally executing the code on, COND_EXEC_CODE is the code
1445 to execute if the condition is true. */
1446 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1447 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1448
1449 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1450 constants pool. */
1451 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1452 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1453
1454 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1455 tree constant pool. This information is private to varasm.c. */
1456 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1457 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1458 (RTX), SYMBOL_REF)->frame_related)
1459
1460 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1461 #define SYMBOL_REF_FLAG(RTX) \
1462 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1463
1464 /* 1 if RTX is a symbol_ref that has been the library function in
1465 emit_library_call. */
1466 #define SYMBOL_REF_USED(RTX) \
1467 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1468
1469 /* 1 if RTX is a symbol_ref for a weak symbol. */
1470 #define SYMBOL_REF_WEAK(RTX) \
1471 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1472
1473 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1474 SYMBOL_REF_CONSTANT. */
1475 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1476
1477 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1478 pool symbol. */
1479 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1480 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1481
1482 /* The tree (decl or constant) associated with the symbol, or null. */
1483 #define SYMBOL_REF_DECL(RTX) \
1484 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1485
1486 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1487 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1488 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1489
1490 /* The rtx constant pool entry for a symbol, or null. */
1491 #define SYMBOL_REF_CONSTANT(RTX) \
1492 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1493
1494 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1495 information derivable from the tree decl associated with this symbol.
1496 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1497 decl. In some cases this is a bug. But beyond that, it's nice to cache
1498 this information to avoid recomputing it. Finally, this allows space for
1499 the target to store more than one bit of information, as with
1500 SYMBOL_REF_FLAG. */
1501 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1502
1503 /* These flags are common enough to be defined for all targets. They
1504 are computed by the default version of targetm.encode_section_info. */
1505
1506 /* Set if this symbol is a function. */
1507 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1508 #define SYMBOL_REF_FUNCTION_P(RTX) \
1509 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1510 /* Set if targetm.binds_local_p is true. */
1511 #define SYMBOL_FLAG_LOCAL (1 << 1)
1512 #define SYMBOL_REF_LOCAL_P(RTX) \
1513 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1514 /* Set if targetm.in_small_data_p is true. */
1515 #define SYMBOL_FLAG_SMALL (1 << 2)
1516 #define SYMBOL_REF_SMALL_P(RTX) \
1517 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1518 /* The three-bit field at [5:3] is true for TLS variables; use
1519 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1520 #define SYMBOL_FLAG_TLS_SHIFT 3
1521 #define SYMBOL_REF_TLS_MODEL(RTX) \
1522 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1523 /* Set if this symbol is not defined in this translation unit. */
1524 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1525 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1526 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1527 /* Set if this symbol has a block_symbol structure associated with it. */
1528 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1529 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1530 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1531 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1532 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1533 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1534 #define SYMBOL_REF_ANCHOR_P(RTX) \
1535 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1536
1537 /* Subsequent bits are available for the target to use. */
1538 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1539 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1540
1541 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1542 structure to which the symbol belongs, or NULL if it has not been
1543 assigned a block. */
1544 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1545
1546 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1547 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1548 RTX has not yet been assigned to a block, or it has not been given an
1549 offset within that block. */
1550 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1551
1552 /* True if RTX is flagged to be a scheduling barrier. */
1553 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1554 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1555
1556 /* Indicate whether the machine has any sort of auto increment addressing.
1557 If not, we can avoid checking for REG_INC notes. */
1558
1559 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1560 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1561 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1562 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1563 #define AUTO_INC_DEC
1564 #endif
1565
1566 /* Define a macro to look for REG_INC notes,
1567 but save time on machines where they never exist. */
1568
1569 #ifdef AUTO_INC_DEC
1570 #define FIND_REG_INC_NOTE(INSN, REG) \
1571 ((REG) != NULL_RTX && REG_P ((REG)) \
1572 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1573 : find_reg_note ((INSN), REG_INC, (REG)))
1574 #else
1575 #define FIND_REG_INC_NOTE(INSN, REG) 0
1576 #endif
1577
1578 #ifndef HAVE_PRE_INCREMENT
1579 #define HAVE_PRE_INCREMENT 0
1580 #endif
1581
1582 #ifndef HAVE_PRE_DECREMENT
1583 #define HAVE_PRE_DECREMENT 0
1584 #endif
1585
1586 #ifndef HAVE_POST_INCREMENT
1587 #define HAVE_POST_INCREMENT 0
1588 #endif
1589
1590 #ifndef HAVE_POST_DECREMENT
1591 #define HAVE_POST_DECREMENT 0
1592 #endif
1593
1594 #ifndef HAVE_POST_MODIFY_DISP
1595 #define HAVE_POST_MODIFY_DISP 0
1596 #endif
1597
1598 #ifndef HAVE_POST_MODIFY_REG
1599 #define HAVE_POST_MODIFY_REG 0
1600 #endif
1601
1602 #ifndef HAVE_PRE_MODIFY_DISP
1603 #define HAVE_PRE_MODIFY_DISP 0
1604 #endif
1605
1606 #ifndef HAVE_PRE_MODIFY_REG
1607 #define HAVE_PRE_MODIFY_REG 0
1608 #endif
1609
1610
1611 /* Some architectures do not have complete pre/post increment/decrement
1612 instruction sets, or only move some modes efficiently. These macros
1613 allow us to tune autoincrement generation. */
1614
1615 #ifndef USE_LOAD_POST_INCREMENT
1616 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1617 #endif
1618
1619 #ifndef USE_LOAD_POST_DECREMENT
1620 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1621 #endif
1622
1623 #ifndef USE_LOAD_PRE_INCREMENT
1624 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1625 #endif
1626
1627 #ifndef USE_LOAD_PRE_DECREMENT
1628 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1629 #endif
1630
1631 #ifndef USE_STORE_POST_INCREMENT
1632 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1633 #endif
1634
1635 #ifndef USE_STORE_POST_DECREMENT
1636 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1637 #endif
1638
1639 #ifndef USE_STORE_PRE_INCREMENT
1640 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1641 #endif
1642
1643 #ifndef USE_STORE_PRE_DECREMENT
1644 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1645 #endif
1646 \f
1647 /* Nonzero when we are generating CONCATs. */
1648 extern int generating_concat_p;
1649
1650 /* Nonzero when we are expanding trees to RTL. */
1651 extern int currently_expanding_to_rtl;
1652
1653 /* Generally useful functions. */
1654
1655 /* In expmed.c */
1656 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1657
1658 /* In explow.c */
1659 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1660 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1661
1662 /* In rtl.c */
1663 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1664 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1665
1666 extern rtvec rtvec_alloc (int);
1667 extern rtvec shallow_copy_rtvec (rtvec);
1668 extern bool shared_const_p (const_rtx);
1669 extern rtx copy_rtx (rtx);
1670 extern void dump_rtx_statistics (void);
1671
1672 /* In emit-rtl.c */
1673 extern rtx copy_rtx_if_shared (rtx);
1674
1675 /* In rtl.c */
1676 extern unsigned int rtx_size (const_rtx);
1677 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1678 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1679 extern int rtx_equal_p (const_rtx, const_rtx);
1680 extern hashval_t iterative_hash_rtx (const_rtx, hashval_t);
1681
1682 /* In emit-rtl.c */
1683 extern rtvec gen_rtvec_v (int, rtx *);
1684 extern rtx gen_reg_rtx (enum machine_mode);
1685 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1686 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1687 extern rtx gen_reg_rtx_and_attrs (rtx);
1688 extern rtx gen_label_rtx (void);
1689 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1690
1691 /* In cse.c */
1692 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1693
1694 /* In emit-rtl.c */
1695 extern rtx gen_highpart (enum machine_mode, rtx);
1696 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1697 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1698
1699 /* In emit-rtl.c */
1700 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1701 extern bool paradoxical_subreg_p (const_rtx);
1702 extern int subreg_lowpart_p (const_rtx);
1703 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1704 enum machine_mode);
1705 extern unsigned int subreg_highpart_offset (enum machine_mode,
1706 enum machine_mode);
1707 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1708 extern rtx make_safe_from (rtx, rtx);
1709 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1710 addr_space_t);
1711 #define convert_memory_address(to_mode,x) \
1712 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1713 extern const char *get_insn_name (int);
1714 extern rtx get_last_insn_anywhere (void);
1715 extern rtx get_first_nonnote_insn (void);
1716 extern rtx get_last_nonnote_insn (void);
1717 extern void start_sequence (void);
1718 extern void push_to_sequence (rtx);
1719 extern void push_to_sequence2 (rtx, rtx);
1720 extern void end_sequence (void);
1721 extern double_int rtx_to_double_int (const_rtx);
1722 extern rtx immed_double_int_const (double_int, enum machine_mode);
1723 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1724 enum machine_mode);
1725
1726 /* In loop-iv.c */
1727
1728 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1729
1730 /* In varasm.c */
1731 extern rtx force_const_mem (enum machine_mode, rtx);
1732
1733 /* In varasm.c */
1734
1735 struct function;
1736 extern rtx get_pool_constant (rtx);
1737 extern rtx get_pool_constant_mark (rtx, bool *);
1738 extern enum machine_mode get_pool_mode (const_rtx);
1739 extern rtx simplify_subtraction (rtx);
1740 extern void decide_function_section (tree);
1741
1742 /* In function.c */
1743 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1744 #define ASLK_REDUCE_ALIGN 1
1745 #define ASLK_RECORD_PAD 2
1746 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, int);
1747 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1748 extern rtx assign_stack_temp_for_type (enum machine_mode,
1749 HOST_WIDE_INT, int, tree);
1750 extern rtx assign_temp (tree, int, int, int);
1751
1752 /* In emit-rtl.c */
1753 extern rtx emit_insn_before (rtx, rtx);
1754 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1755 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1756 extern rtx emit_jump_insn_before (rtx, rtx);
1757 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1758 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1759 extern rtx emit_call_insn_before (rtx, rtx);
1760 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1761 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1762 extern rtx emit_debug_insn_before (rtx, rtx);
1763 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1764 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1765 extern rtx emit_barrier_before (rtx);
1766 extern rtx emit_label_before (rtx, rtx);
1767 extern rtx emit_note_before (enum insn_note, rtx);
1768 extern rtx emit_insn_after (rtx, rtx);
1769 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1770 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1771 extern rtx emit_jump_insn_after (rtx, rtx);
1772 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1773 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1774 extern rtx emit_call_insn_after (rtx, rtx);
1775 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1776 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1777 extern rtx emit_debug_insn_after (rtx, rtx);
1778 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1779 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1780 extern rtx emit_barrier_after (rtx);
1781 extern rtx emit_label_after (rtx, rtx);
1782 extern rtx emit_note_after (enum insn_note, rtx);
1783 extern rtx emit_insn (rtx);
1784 extern rtx emit_debug_insn (rtx);
1785 extern rtx emit_jump_insn (rtx);
1786 extern rtx emit_call_insn (rtx);
1787 extern rtx emit_label (rtx);
1788 extern rtx emit_barrier (void);
1789 extern rtx emit_note (enum insn_note);
1790 extern rtx emit_note_copy (rtx);
1791 extern rtx gen_clobber (rtx);
1792 extern rtx emit_clobber (rtx);
1793 extern rtx gen_use (rtx);
1794 extern rtx emit_use (rtx);
1795 extern rtx make_insn_raw (rtx);
1796 extern rtx make_debug_insn_raw (rtx);
1797 extern rtx make_jump_insn_raw (rtx);
1798 extern void add_function_usage_to (rtx, rtx);
1799 extern rtx last_call_insn (void);
1800 extern rtx previous_insn (rtx);
1801 extern rtx next_insn (rtx);
1802 extern rtx prev_nonnote_insn (rtx);
1803 extern rtx prev_nonnote_insn_bb (rtx);
1804 extern rtx next_nonnote_insn (rtx);
1805 extern rtx next_nonnote_insn_bb (rtx);
1806 extern rtx prev_nondebug_insn (rtx);
1807 extern rtx next_nondebug_insn (rtx);
1808 extern rtx prev_nonnote_nondebug_insn (rtx);
1809 extern rtx next_nonnote_nondebug_insn (rtx);
1810 extern rtx prev_real_insn (rtx);
1811 extern rtx next_real_insn (rtx);
1812 extern rtx prev_active_insn (rtx);
1813 extern rtx next_active_insn (rtx);
1814 extern int active_insn_p (const_rtx);
1815 extern rtx prev_label (rtx);
1816 extern rtx next_label (rtx);
1817 extern rtx skip_consecutive_labels (rtx);
1818 extern rtx next_cc0_user (rtx);
1819 extern rtx prev_cc0_setter (rtx);
1820
1821 /* In cfglayout.c */
1822 extern int insn_line (const_rtx);
1823 extern const char * insn_file (const_rtx);
1824 extern location_t locator_location (int);
1825 extern int locator_line (int);
1826 extern const char * locator_file (int);
1827 extern bool locator_eq (int, int);
1828 extern int prologue_locator, epilogue_locator;
1829
1830 /* In jump.c */
1831 extern enum rtx_code reverse_condition (enum rtx_code);
1832 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1833 extern enum rtx_code swap_condition (enum rtx_code);
1834 extern enum rtx_code unsigned_condition (enum rtx_code);
1835 extern enum rtx_code signed_condition (enum rtx_code);
1836 extern void mark_jump_label (rtx, rtx, int);
1837 extern unsigned int cleanup_barriers (void);
1838
1839 /* In jump.c */
1840 extern rtx delete_related_insns (rtx);
1841
1842 /* In recog.c */
1843 extern rtx *find_constant_term_loc (rtx *);
1844
1845 /* In emit-rtl.c */
1846 extern rtx try_split (rtx, rtx, int);
1847 extern int split_branch_probability;
1848
1849 /* In unknown file */
1850 extern rtx split_insns (rtx, rtx);
1851
1852 /* In simplify-rtx.c */
1853 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1854 rtx, enum machine_mode);
1855 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1856 enum machine_mode);
1857 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1858 rtx, rtx);
1859 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1860 rtx);
1861 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1862 enum machine_mode, rtx, rtx, rtx);
1863 extern rtx simplify_const_relational_operation (enum rtx_code,
1864 enum machine_mode, rtx, rtx);
1865 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1866 enum machine_mode, rtx, rtx);
1867 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1868 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1869 enum machine_mode);
1870 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1871 enum machine_mode, rtx, rtx, rtx);
1872 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1873 enum machine_mode, rtx, rtx);
1874 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1875 unsigned int);
1876 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1877 unsigned int);
1878 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1879 rtx (*fn) (rtx, const_rtx, void *), void *);
1880 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1881 extern rtx simplify_rtx (const_rtx);
1882 extern rtx avoid_constant_pool_reference (rtx);
1883 extern rtx delegitimize_mem_from_attrs (rtx);
1884 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1885 extern bool val_signbit_p (enum machine_mode, unsigned HOST_WIDE_INT);
1886 extern bool val_signbit_known_set_p (enum machine_mode,
1887 unsigned HOST_WIDE_INT);
1888 extern bool val_signbit_known_clear_p (enum machine_mode,
1889 unsigned HOST_WIDE_INT);
1890
1891 /* In reginfo.c */
1892 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1893 bool);
1894
1895 /* In emit-rtl.c */
1896 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1897 extern void set_insn_deleted (rtx);
1898
1899 /* Functions in rtlanal.c */
1900
1901 /* Single set is implemented as macro for performance reasons. */
1902 #define single_set(I) (INSN_P (I) \
1903 ? (GET_CODE (PATTERN (I)) == SET \
1904 ? PATTERN (I) : single_set_1 (I)) \
1905 : NULL_RTX)
1906 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1907
1908 /* Structure used for passing data to REPLACE_LABEL. */
1909 typedef struct replace_label_data
1910 {
1911 rtx r1;
1912 rtx r2;
1913 bool update_label_nuses;
1914 } replace_label_data;
1915
1916 extern int rtx_addr_can_trap_p (const_rtx);
1917 extern bool nonzero_address_p (const_rtx);
1918 extern int rtx_unstable_p (const_rtx);
1919 extern bool rtx_varies_p (const_rtx, bool);
1920 extern bool rtx_addr_varies_p (const_rtx, bool);
1921 extern HOST_WIDE_INT get_integer_term (const_rtx);
1922 extern rtx get_related_value (const_rtx);
1923 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1924 extern void split_const (rtx, rtx *, rtx *);
1925 extern int reg_mentioned_p (const_rtx, const_rtx);
1926 extern int count_occurrences (const_rtx, const_rtx, int);
1927 extern int reg_referenced_p (const_rtx, const_rtx);
1928 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1929 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1930 extern int commutative_operand_precedence (rtx);
1931 extern bool swap_commutative_operands_p (rtx, rtx);
1932 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1933 extern int no_labels_between_p (const_rtx, const_rtx);
1934 extern int modified_in_p (const_rtx, const_rtx);
1935 extern int reg_set_p (const_rtx, const_rtx);
1936 extern rtx single_set_2 (const_rtx, const_rtx);
1937 extern int multiple_sets (const_rtx);
1938 extern int set_noop_p (const_rtx);
1939 extern int noop_move_p (const_rtx);
1940 extern rtx find_last_value (rtx, rtx *, rtx, int);
1941 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1942 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1943 extern const_rtx set_of (const_rtx, const_rtx);
1944 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1945 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1946 extern int dead_or_set_p (const_rtx, const_rtx);
1947 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1948 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1949 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1950 extern rtx find_reg_equal_equiv_note (const_rtx);
1951 extern rtx find_constant_src (const_rtx);
1952 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1953 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1954 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1955 extern void add_reg_note (rtx, enum reg_note, rtx);
1956 extern void remove_note (rtx, const_rtx);
1957 extern void remove_reg_equal_equiv_notes (rtx);
1958 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
1959 extern int side_effects_p (const_rtx);
1960 extern int volatile_refs_p (const_rtx);
1961 extern int volatile_insn_p (const_rtx);
1962 extern int may_trap_p_1 (const_rtx, unsigned);
1963 extern int may_trap_p (const_rtx);
1964 extern int may_trap_or_fault_p (const_rtx);
1965 extern bool can_throw_internal (const_rtx);
1966 extern bool can_throw_external (const_rtx);
1967 extern bool insn_could_throw_p (const_rtx);
1968 extern bool insn_nothrow_p (const_rtx);
1969 extern bool can_nonlocal_goto (const_rtx);
1970 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1971 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1972 extern int inequality_comparisons_p (const_rtx);
1973 extern rtx replace_rtx (rtx, rtx, rtx);
1974 extern int replace_label (rtx *, void *);
1975 extern int rtx_referenced_p (rtx, rtx);
1976 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1977 extern int computed_jump_p (const_rtx);
1978
1979 typedef int (*rtx_function) (rtx *, void *);
1980 extern int for_each_rtx (rtx *, rtx_function, void *);
1981
1982 /* Callback for for_each_inc_dec, to process the autoinc operation OP
1983 within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is
1984 NULL. The callback is passed the same opaque ARG passed to
1985 for_each_inc_dec. Return zero to continue looking for other
1986 autoinc operations, -1 to skip OP's operands, and any other value
1987 to interrupt the traversal and return that value to the caller of
1988 for_each_inc_dec. */
1989 typedef int (*for_each_inc_dec_fn) (rtx mem, rtx op, rtx dest, rtx src,
1990 rtx srcoff, void *arg);
1991 extern int for_each_inc_dec (rtx *, for_each_inc_dec_fn, void *arg);
1992
1993 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1994 rtx *, rtx *);
1995 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1996 rtx_equal_p_callback_function);
1997
1998 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1999 enum machine_mode *);
2000 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
2001 bool, hash_rtx_callback_function);
2002
2003 extern rtx regno_use_in (unsigned int, rtx);
2004 extern int auto_inc_p (const_rtx);
2005 extern int in_expr_list_p (const_rtx, const_rtx);
2006 extern void remove_node_from_expr_list (const_rtx, rtx *);
2007 extern int loc_mentioned_in_p (rtx *, const_rtx);
2008 extern rtx find_first_parameter_load (rtx, rtx);
2009 extern bool keep_with_call_p (const_rtx);
2010 extern bool label_is_jump_target_p (const_rtx, const_rtx);
2011 extern int insn_rtx_cost (rtx, bool);
2012
2013 /* Given an insn and condition, return a canonical description of
2014 the test being made. */
2015 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
2016
2017 /* Given a JUMP_INSN, return a canonical description of the test
2018 being made. */
2019 extern rtx get_condition (rtx, rtx *, int, int);
2020
2021 /* Information about a subreg of a hard register. */
2022 struct subreg_info
2023 {
2024 /* Offset of first hard register involved in the subreg. */
2025 int offset;
2026 /* Number of hard registers involved in the subreg. */
2027 int nregs;
2028 /* Whether this subreg can be represented as a hard reg with the new
2029 mode. */
2030 bool representable_p;
2031 };
2032
2033 extern void subreg_get_info (unsigned int, enum machine_mode,
2034 unsigned int, enum machine_mode,
2035 struct subreg_info *);
2036
2037 /* lists.c */
2038
2039 extern void free_EXPR_LIST_list (rtx *);
2040 extern void free_INSN_LIST_list (rtx *);
2041 extern void free_EXPR_LIST_node (rtx);
2042 extern void free_INSN_LIST_node (rtx);
2043 extern rtx alloc_INSN_LIST (rtx, rtx);
2044 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
2045 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
2046 extern rtx remove_list_elem (rtx, rtx *);
2047 extern rtx remove_free_INSN_LIST_node (rtx *);
2048 extern rtx remove_free_EXPR_LIST_node (rtx *);
2049
2050
2051 /* reginfo.c */
2052
2053 /* Initialize may_move_cost and friends for mode M. */
2054 extern void init_move_cost (enum machine_mode);
2055 /* Resize reg info. */
2056 extern bool resize_reg_info (void);
2057 /* Free up register info memory. */
2058 extern void free_reg_info (void);
2059 extern void init_subregs_of_mode (void);
2060 extern void finish_subregs_of_mode (void);
2061
2062 /* recog.c */
2063 extern rtx extract_asm_operands (rtx);
2064 extern int asm_noperands (const_rtx);
2065 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
2066 enum machine_mode *, location_t *);
2067
2068 extern enum reg_class reg_preferred_class (int);
2069 extern enum reg_class reg_alternate_class (int);
2070 extern enum reg_class reg_allocno_class (int);
2071 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
2072 enum reg_class);
2073
2074 extern void split_all_insns (void);
2075 extern unsigned int split_all_insns_noflow (void);
2076
2077 #define MAX_SAVED_CONST_INT 64
2078 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
2079
2080 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
2081 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
2082 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
2083 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
2084 extern GTY(()) rtx const_true_rtx;
2085
2086 extern GTY(()) rtx const_tiny_rtx[4][(int) MAX_MACHINE_MODE];
2087
2088 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
2089 same as VOIDmode. */
2090
2091 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
2092
2093 /* Likewise, for the constants 1 and 2 and -1. */
2094
2095 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
2096 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
2097 #define CONSTM1_RTX(MODE) (const_tiny_rtx[3][(int) (MODE)])
2098
2099 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
2100 is used to represent the frame pointer. This is because the
2101 hard frame pointer and the automatic variables are separated by an amount
2102 that cannot be determined until after register allocation. We can assume
2103 that in this case ELIMINABLE_REGS will be defined, one action of which
2104 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
2105 #ifndef HARD_FRAME_POINTER_REGNUM
2106 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
2107 #endif
2108
2109 #ifndef HARD_FRAME_POINTER_IS_FRAME_POINTER
2110 #define HARD_FRAME_POINTER_IS_FRAME_POINTER \
2111 (HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM)
2112 #endif
2113
2114 #ifndef HARD_FRAME_POINTER_IS_ARG_POINTER
2115 #define HARD_FRAME_POINTER_IS_ARG_POINTER \
2116 (HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM)
2117 #endif
2118
2119 /* Index labels for global_rtl. */
2120 enum global_rtl_index
2121 {
2122 GR_PC,
2123 GR_CC0,
2124 GR_RETURN,
2125 GR_SIMPLE_RETURN,
2126 GR_STACK_POINTER,
2127 GR_FRAME_POINTER,
2128 /* For register elimination to work properly these hard_frame_pointer_rtx,
2129 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2130 the same register. */
2131 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2132 GR_ARG_POINTER = GR_FRAME_POINTER,
2133 #endif
2134 #if HARD_FRAME_POINTER_IS_FRAME_POINTER
2135 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2136 #else
2137 GR_HARD_FRAME_POINTER,
2138 #endif
2139 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2140 #if HARD_FRAME_POINTER_IS_ARG_POINTER
2141 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2142 #else
2143 GR_ARG_POINTER,
2144 #endif
2145 #endif
2146 GR_VIRTUAL_INCOMING_ARGS,
2147 GR_VIRTUAL_STACK_ARGS,
2148 GR_VIRTUAL_STACK_DYNAMIC,
2149 GR_VIRTUAL_OUTGOING_ARGS,
2150 GR_VIRTUAL_CFA,
2151 GR_VIRTUAL_PREFERRED_STACK_BOUNDARY,
2152
2153 GR_MAX
2154 };
2155
2156 /* Target-dependent globals. */
2157 struct GTY(()) target_rtl {
2158 /* All references to the hard registers in global_rtl_index go through
2159 these unique rtl objects. On machines where the frame-pointer and
2160 arg-pointer are the same register, they use the same unique object.
2161
2162 After register allocation, other rtl objects which used to be pseudo-regs
2163 may be clobbered to refer to the frame-pointer register.
2164 But references that were originally to the frame-pointer can be
2165 distinguished from the others because they contain frame_pointer_rtx.
2166
2167 When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
2168 tricky: until register elimination has taken place hard_frame_pointer_rtx
2169 should be used if it is being set, and frame_pointer_rtx otherwise. After
2170 register elimination hard_frame_pointer_rtx should always be used.
2171 On machines where the two registers are same (most) then these are the
2172 same. */
2173 rtx x_global_rtl[GR_MAX];
2174
2175 /* A unique representation of (REG:Pmode PIC_OFFSET_TABLE_REGNUM). */
2176 rtx x_pic_offset_table_rtx;
2177
2178 /* A unique representation of (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM).
2179 This is used to implement __builtin_return_address for some machines;
2180 see for instance the MIPS port. */
2181 rtx x_return_address_pointer_rtx;
2182
2183 /* Commonly used RTL for hard registers. These objects are not
2184 necessarily unique, so we allocate them separately from global_rtl.
2185 They are initialized once per compilation unit, then copied into
2186 regno_reg_rtx at the beginning of each function. */
2187 rtx x_initial_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
2188
2189 /* A sample (mem:M stack_pointer_rtx) rtx for each mode M. */
2190 rtx x_top_of_stack[MAX_MACHINE_MODE];
2191
2192 /* Static hunks of RTL used by the aliasing code; these are treated
2193 as persistent to avoid unnecessary RTL allocations. */
2194 rtx x_static_reg_base_value[FIRST_PSEUDO_REGISTER];
2195
2196 /* The default memory attributes for each mode. */
2197 struct mem_attrs *x_mode_mem_attrs[(int) MAX_MACHINE_MODE];
2198 };
2199
2200 extern GTY(()) struct target_rtl default_target_rtl;
2201 #if SWITCHABLE_TARGET
2202 extern struct target_rtl *this_target_rtl;
2203 #else
2204 #define this_target_rtl (&default_target_rtl)
2205 #endif
2206
2207 #define global_rtl \
2208 (this_target_rtl->x_global_rtl)
2209 #define pic_offset_table_rtx \
2210 (this_target_rtl->x_pic_offset_table_rtx)
2211 #define return_address_pointer_rtx \
2212 (this_target_rtl->x_return_address_pointer_rtx)
2213 #define top_of_stack \
2214 (this_target_rtl->x_top_of_stack)
2215 #define mode_mem_attrs \
2216 (this_target_rtl->x_mode_mem_attrs)
2217
2218 /* Standard pieces of rtx, to be substituted directly into things. */
2219 #define pc_rtx (global_rtl[GR_PC])
2220 #define ret_rtx (global_rtl[GR_RETURN])
2221 #define simple_return_rtx (global_rtl[GR_SIMPLE_RETURN])
2222 #define cc0_rtx (global_rtl[GR_CC0])
2223
2224 /* All references to certain hard regs, except those created
2225 by allocating pseudo regs into them (when that's possible),
2226 go through these unique rtx objects. */
2227 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2228 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2229 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2230 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2231
2232 #ifndef GENERATOR_FILE
2233 /* Return the attributes of a MEM rtx. */
2234 static inline struct mem_attrs *
2235 get_mem_attrs (const_rtx x)
2236 {
2237 struct mem_attrs *attrs;
2238
2239 attrs = MEM_ATTRS (x);
2240 if (!attrs)
2241 attrs = mode_mem_attrs[(int) GET_MODE (x)];
2242 return attrs;
2243 }
2244 #endif
2245
2246 /* Include the RTL generation functions. */
2247
2248 #ifndef GENERATOR_FILE
2249 #include "genrtl.h"
2250 #undef gen_rtx_ASM_INPUT
2251 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2252 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2253 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2254 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2255 #endif
2256
2257 /* There are some RTL codes that require special attention; the
2258 generation functions included above do the raw handling. If you
2259 add to this list, modify special_rtx in gengenrtl.c as well. */
2260
2261 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2262 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2263 extern rtx gen_raw_REG (enum machine_mode, int);
2264 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2265 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2266 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2267
2268 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2269
2270 /* Virtual registers are used during RTL generation to refer to locations into
2271 the stack frame when the actual location isn't known until RTL generation
2272 is complete. The routine instantiate_virtual_regs replaces these with
2273 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2274 a constant. */
2275
2276 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2277
2278 /* This points to the first word of the incoming arguments passed on the stack,
2279 either by the caller or by the callee when pretending it was passed by the
2280 caller. */
2281
2282 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2283
2284 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2285
2286 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2287 variable on the stack. Otherwise, it points to the first variable on
2288 the stack. */
2289
2290 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2291
2292 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2293
2294 /* This points to the location of dynamically-allocated memory on the stack
2295 immediately after the stack pointer has been adjusted by the amount
2296 desired. */
2297
2298 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2299
2300 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2301
2302 /* This points to the location in the stack at which outgoing arguments should
2303 be written when the stack is pre-pushed (arguments pushed using push
2304 insns always use sp). */
2305
2306 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2307
2308 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2309
2310 /* This points to the Canonical Frame Address of the function. This
2311 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2312 but is calculated relative to the arg pointer for simplicity; the
2313 frame pointer nor stack pointer are necessarily fixed relative to
2314 the CFA until after reload. */
2315
2316 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2317
2318 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2319
2320 #define LAST_VIRTUAL_POINTER_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2321
2322 /* This is replaced by crtl->preferred_stack_boundary / BITS_PER_UNIT
2323 when finalized. */
2324
2325 #define virtual_preferred_stack_boundary_rtx \
2326 (global_rtl[GR_VIRTUAL_PREFERRED_STACK_BOUNDARY])
2327
2328 #define VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM \
2329 ((FIRST_VIRTUAL_REGISTER) + 5)
2330
2331 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 5)
2332
2333 /* Nonzero if REGNUM is a pointer into the stack frame. */
2334 #define REGNO_PTR_FRAME_P(REGNUM) \
2335 ((REGNUM) == STACK_POINTER_REGNUM \
2336 || (REGNUM) == FRAME_POINTER_REGNUM \
2337 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2338 || (REGNUM) == ARG_POINTER_REGNUM \
2339 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2340 && (REGNUM) <= LAST_VIRTUAL_POINTER_REGISTER))
2341
2342 /* REGNUM never really appearing in the INSN stream. */
2343 #define INVALID_REGNUM (~(unsigned int) 0)
2344
2345 extern rtx output_constant_def (tree, int);
2346 extern rtx lookup_constant_def (tree);
2347
2348 /* Nonzero after end of reload pass.
2349 Set to 1 or 0 by reload1.c. */
2350
2351 extern int reload_completed;
2352
2353 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2354 extern int epilogue_completed;
2355
2356 /* Set to 1 while reload_as_needed is operating.
2357 Required by some machines to handle any generated moves differently. */
2358
2359 extern int reload_in_progress;
2360
2361 /* This macro indicates whether you may create a new
2362 pseudo-register. */
2363
2364 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2365
2366 #ifdef STACK_REGS
2367 /* Nonzero after end of regstack pass.
2368 Set to 1 or 0 by reg-stack.c. */
2369 extern int regstack_completed;
2370 #endif
2371
2372 /* If this is nonzero, we do not bother generating VOLATILE
2373 around volatile memory references, and we are willing to
2374 output indirect addresses. If cse is to follow, we reject
2375 indirect addresses so a useful potential cse is generated;
2376 if it is used only once, instruction combination will produce
2377 the same indirect address eventually. */
2378 extern int cse_not_expected;
2379
2380 /* Translates rtx code to tree code, for those codes needed by
2381 REAL_ARITHMETIC. The function returns an int because the caller may not
2382 know what `enum tree_code' means. */
2383
2384 extern int rtx_to_tree_code (enum rtx_code);
2385
2386 /* In cse.c */
2387 extern int delete_trivially_dead_insns (rtx, int);
2388 extern int cse_main (rtx, int);
2389 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2390 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2391
2392 /* In dse.c */
2393 extern void check_for_inc_dec (rtx insn);
2394
2395 /* In jump.c */
2396 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2397 extern bool jump_to_label_p (rtx);
2398 extern int condjump_p (const_rtx);
2399 extern int any_condjump_p (const_rtx);
2400 extern int any_uncondjump_p (const_rtx);
2401 extern rtx pc_set (const_rtx);
2402 extern rtx condjump_label (const_rtx);
2403 extern int simplejump_p (const_rtx);
2404 extern int returnjump_p (rtx);
2405 extern int eh_returnjump_p (rtx);
2406 extern int onlyjump_p (const_rtx);
2407 extern int only_sets_cc0_p (const_rtx);
2408 extern int sets_cc0_p (const_rtx);
2409 extern int invert_jump_1 (rtx, rtx);
2410 extern int invert_jump (rtx, rtx, int);
2411 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2412 extern int true_regnum (const_rtx);
2413 extern unsigned int reg_or_subregno (const_rtx);
2414 extern int redirect_jump_1 (rtx, rtx);
2415 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2416 extern int redirect_jump (rtx, rtx, int);
2417 extern void rebuild_jump_labels (rtx);
2418 extern void rebuild_jump_labels_chain (rtx);
2419 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2420 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2421 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2422 const_rtx, const_rtx);
2423 extern void delete_for_peephole (rtx, rtx);
2424 extern int condjump_in_parallel_p (const_rtx);
2425
2426 /* In emit-rtl.c. */
2427 extern int max_reg_num (void);
2428 extern int max_label_num (void);
2429 extern int get_first_label_num (void);
2430 extern void maybe_set_first_label_num (rtx);
2431 extern void delete_insns_since (rtx);
2432 extern void mark_reg_pointer (rtx, int);
2433 extern void mark_user_reg (rtx);
2434 extern void reset_used_flags (rtx);
2435 extern void set_used_flags (rtx);
2436 extern void reorder_insns (rtx, rtx, rtx);
2437 extern void reorder_insns_nobb (rtx, rtx, rtx);
2438 extern int get_max_insn_count (void);
2439 extern int in_sequence_p (void);
2440 extern void force_next_line_note (void);
2441 extern void init_emit (void);
2442 extern void init_emit_regs (void);
2443 extern void init_emit_once (void);
2444 extern void push_topmost_sequence (void);
2445 extern void pop_topmost_sequence (void);
2446 extern void set_new_first_and_last_insn (rtx, rtx);
2447 extern unsigned int unshare_all_rtl (void);
2448 extern void unshare_all_rtl_again (rtx);
2449 extern void unshare_all_rtl_in_chain (rtx);
2450 extern void verify_rtl_sharing (void);
2451 extern void link_cc0_insns (rtx);
2452 extern void add_insn (rtx);
2453 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2454 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2455 extern void remove_insn (rtx);
2456 extern rtx emit (rtx);
2457 extern rtx delete_insn (rtx);
2458 extern rtx entry_of_function (void);
2459 extern void emit_insn_at_entry (rtx);
2460 extern void delete_insn_chain (rtx, rtx, bool);
2461 extern rtx unlink_insn_chain (rtx, rtx);
2462 extern rtx delete_insn_and_edges (rtx);
2463 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2464 extern rtx gen_const_mem (enum machine_mode, rtx);
2465 extern rtx gen_frame_mem (enum machine_mode, rtx);
2466 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2467 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2468 const_rtx, unsigned int);
2469
2470 /* In combine.c */
2471 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2472 extern rtx remove_death (unsigned int, rtx);
2473 extern void dump_combine_stats (FILE *);
2474 extern void dump_combine_total_stats (FILE *);
2475
2476 /* In cfgcleanup.c */
2477 extern void delete_dead_jumptables (void);
2478
2479 /* In sched-vis.c. */
2480 extern void debug_bb_n_slim (int);
2481 extern void debug_bb_slim (struct basic_block_def *);
2482 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2483 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2484 extern void dump_insn_slim (FILE *f, rtx x);
2485 extern void debug_insn_slim (rtx x);
2486
2487 /* In sched-rgn.c. */
2488 extern void schedule_insns (void);
2489
2490 /* In sched-ebb.c. */
2491 extern void schedule_ebbs (void);
2492
2493 /* In sel-sched-dump.c. */
2494 extern void sel_sched_fix_param (const char *param, const char *val);
2495
2496 /* In print-rtl.c */
2497 extern const char *print_rtx_head;
2498 extern void debug_rtx (const_rtx);
2499 extern void debug_rtx_list (const_rtx, int);
2500 extern void debug_rtx_range (const_rtx, const_rtx);
2501 extern const_rtx debug_rtx_find (const_rtx, int);
2502 extern void print_mem_expr (FILE *, const_tree);
2503 extern void print_rtl (FILE *, const_rtx);
2504 extern void print_simple_rtl (FILE *, const_rtx);
2505 extern int print_rtl_single (FILE *, const_rtx);
2506 extern void print_inline_rtx (FILE *, const_rtx, int);
2507
2508 /* In function.c */
2509 extern void reposition_prologue_and_epilogue_notes (void);
2510 extern int prologue_epilogue_contains (const_rtx);
2511 extern int sibcall_epilogue_contains (const_rtx);
2512 extern void mark_temp_addr_taken (rtx);
2513 extern void update_temp_slot_address (rtx, rtx);
2514 extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
2515 extern void set_return_jump_label (rtx);
2516
2517 /* In stmt.c */
2518 extern void expand_null_return (void);
2519 extern void expand_naked_return (void);
2520 extern void emit_jump (rtx);
2521
2522 /* In expr.c */
2523 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2524 unsigned int, int);
2525 extern HOST_WIDE_INT find_args_size_adjust (rtx);
2526 extern int fixup_args_size_notes (rtx, rtx, int);
2527
2528 /* In cfgrtl.c */
2529 extern void print_rtl_with_bb (FILE *, const_rtx);
2530
2531 /* In cfg.c. */
2532 extern void dump_reg_info (FILE *);
2533 extern void dump_flow_info (FILE *, int);
2534
2535 /* In expmed.c */
2536 extern void init_expmed (void);
2537 extern void expand_inc (rtx, rtx);
2538 extern void expand_dec (rtx, rtx);
2539
2540 /* In gcse.c */
2541 extern bool can_copy_p (enum machine_mode);
2542 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2543 extern rtx fis_get_condition (rtx);
2544
2545 /* In ira.c */
2546 #ifdef HARD_CONST
2547 extern HARD_REG_SET eliminable_regset;
2548 #endif
2549 extern void mark_elimination (int, int);
2550
2551 /* In reginfo.c */
2552 extern int reg_classes_intersect_p (reg_class_t, reg_class_t);
2553 extern int reg_class_subset_p (reg_class_t, reg_class_t);
2554 extern void globalize_reg (tree, int);
2555 extern void init_reg_modes_target (void);
2556 extern void init_regs (void);
2557 extern void reinit_regs (void);
2558 extern void init_fake_stack_mems (void);
2559 extern void save_register_info (void);
2560 extern void init_reg_sets (void);
2561 extern void regclass (rtx, int);
2562 extern void reg_scan (rtx, unsigned int);
2563 extern void fix_register (const char *, int, int);
2564 extern bool invalid_mode_change_p (unsigned int, enum reg_class);
2565
2566 /* In reorg.c */
2567 extern void dbr_schedule (rtx);
2568
2569 /* In reload1.c */
2570 extern int function_invariant_p (const_rtx);
2571
2572 /* In calls.c */
2573 enum libcall_type
2574 {
2575 LCT_NORMAL = 0,
2576 LCT_CONST = 1,
2577 LCT_PURE = 2,
2578 LCT_NORETURN = 3,
2579 LCT_THROW = 4,
2580 LCT_RETURNS_TWICE = 5
2581 };
2582
2583 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2584 ...);
2585 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2586 enum machine_mode, int, ...);
2587
2588 /* In varasm.c */
2589 extern void init_varasm_once (void);
2590
2591 extern rtx make_debug_expr_from_rtl (const_rtx);
2592
2593 /* In read-rtl.c */
2594 extern bool read_rtx (const char *, rtx *);
2595
2596 /* In alias.c */
2597 extern rtx canon_rtx (rtx);
2598 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2599 extern rtx get_addr (rtx);
2600 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2601 rtx, bool (*)(const_rtx, bool));
2602 extern int read_dependence (const_rtx, const_rtx);
2603 extern int anti_dependence (const_rtx, const_rtx);
2604 extern int output_dependence (const_rtx, const_rtx);
2605 extern int may_alias_p (const_rtx, const_rtx);
2606 extern void init_alias_target (void);
2607 extern void init_alias_analysis (void);
2608 extern void end_alias_analysis (void);
2609 extern void vt_equate_reg_base_value (const_rtx, const_rtx);
2610 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2611 extern rtx find_base_term (rtx);
2612 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2613 extern rtx get_reg_known_value (unsigned int);
2614 extern bool get_reg_known_equiv_p (unsigned int);
2615 extern rtx get_reg_base_value (unsigned int);
2616
2617 #ifdef STACK_REGS
2618 extern int stack_regs_mentioned (const_rtx insn);
2619 #endif
2620
2621 /* In toplev.c */
2622 extern GTY(()) rtx stack_limit_rtx;
2623
2624 /* In predict.c */
2625 extern void invert_br_probabilities (rtx);
2626 extern bool expensive_function_p (int);
2627
2628 /* In var-tracking.c */
2629 extern unsigned int variable_tracking_main (void);
2630
2631 /* In stor-layout.c. */
2632 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2633 rtx *, rtx *);
2634
2635 /* In loop-unswitch.c */
2636 extern rtx reversed_condition (rtx);
2637 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2638
2639 /* In loop-iv.c */
2640 extern rtx canon_condition (rtx);
2641 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2642
2643 /* In final.c */
2644 extern unsigned int compute_alignments (void);
2645 extern int asm_str_count (const char *templ);
2646 \f
2647 struct rtl_hooks
2648 {
2649 rtx (*gen_lowpart) (enum machine_mode, rtx);
2650 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2651 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2652 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2653 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2654 unsigned int, unsigned int *);
2655 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2656
2657 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2658 };
2659
2660 /* Each pass can provide its own. */
2661 extern struct rtl_hooks rtl_hooks;
2662
2663 /* ... but then it has to restore these. */
2664 extern const struct rtl_hooks general_rtl_hooks;
2665
2666 /* Keep this for the nonce. */
2667 #define gen_lowpart rtl_hooks.gen_lowpart
2668
2669 extern void insn_locators_alloc (void);
2670 extern void insn_locators_free (void);
2671 extern void insn_locators_finalize (void);
2672 extern void set_curr_insn_source_location (location_t);
2673 extern location_t get_curr_insn_source_location (void);
2674 extern void set_curr_insn_block (tree);
2675 extern tree get_curr_insn_block (void);
2676 extern int curr_insn_locator (void);
2677 extern bool optimize_insn_for_size_p (void);
2678 extern bool optimize_insn_for_speed_p (void);
2679
2680 /* rtl-error.c */
2681 extern void _fatal_insn_not_found (const_rtx, const char *, int, const char *)
2682 ATTRIBUTE_NORETURN;
2683 extern void _fatal_insn (const char *, const_rtx, const char *, int, const char *)
2684 ATTRIBUTE_NORETURN;
2685
2686 #define fatal_insn(msgid, insn) \
2687 _fatal_insn (msgid, insn, __FILE__, __LINE__, __FUNCTION__)
2688 #define fatal_insn_not_found(insn) \
2689 _fatal_insn_not_found (insn, __FILE__, __LINE__, __FUNCTION__)
2690
2691
2692
2693 #endif /* ! GCC_RTL_H */