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gcc/
[official-gcc.git] / gcc / rtl.h
blob43a49c44ed7c412ac63f502aedc45d6212785401
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, 2012
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 #include "flags.h"
35
36 /* Value used by some passes to "recognize" noop moves as valid
37 instructions. */
38 #define NOOP_MOVE_INSN_CODE INT_MAX
39
40 /* Register Transfer Language EXPRESSIONS CODES */
41
42 #define RTX_CODE enum rtx_code
43 enum rtx_code {
44
45 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
46 #include "rtl.def" /* rtl expressions are documented here */
47 #undef DEF_RTL_EXPR
48
49 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
50 NUM_RTX_CODE.
51 Assumes default enum value assignment. */
52
53 /* The cast here, saves many elsewhere. */
54 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
55
56 /* Similar, but since generator files get more entries... */
57 #ifdef GENERATOR_FILE
58 # define NON_GENERATOR_NUM_RTX_CODE ((int) MATCH_OPERAND)
59 #endif
60
61 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
62
63 enum rtx_class {
64 /* We check bit 0-1 of some rtx class codes in the predicates below. */
65
66 /* Bit 0 = comparison if 0, arithmetic is 1
67 Bit 1 = 1 if commutative. */
68 RTX_COMPARE, /* 0 */
69 RTX_COMM_COMPARE,
70 RTX_BIN_ARITH,
71 RTX_COMM_ARITH,
72
73 /* Must follow the four preceding values. */
74 RTX_UNARY, /* 4 */
75
76 RTX_EXTRA,
77 RTX_MATCH,
78 RTX_INSN,
79
80 /* Bit 0 = 1 if constant. */
81 RTX_OBJ, /* 8 */
82 RTX_CONST_OBJ,
83
84 RTX_TERNARY,
85 RTX_BITFIELD_OPS,
86 RTX_AUTOINC
87 };
88
89 #define RTX_OBJ_MASK (~1)
90 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
91 #define RTX_COMPARE_MASK (~1)
92 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
93 #define RTX_ARITHMETIC_MASK (~1)
94 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
95 #define RTX_BINARY_MASK (~3)
96 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
97 #define RTX_COMMUTATIVE_MASK (~2)
98 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
99 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
100
101 extern const unsigned char rtx_length[NUM_RTX_CODE];
102 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
103
104 extern const char * const rtx_name[NUM_RTX_CODE];
105 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
106
107 extern const char * const rtx_format[NUM_RTX_CODE];
108 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
109
110 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
111 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
112
113 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
114 extern const unsigned char rtx_next[NUM_RTX_CODE];
115 \f
116 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
117 relative to which the offsets are calculated, as explained in rtl.def. */
118 typedef struct
119 {
120 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
121 unsigned min_align: 8;
122 /* Flags: */
123 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
124 unsigned min_after_vec: 1; /* minimum address target label is
125 after the ADDR_DIFF_VEC. */
126 unsigned max_after_vec: 1; /* maximum address target label is
127 after the ADDR_DIFF_VEC. */
128 unsigned min_after_base: 1; /* minimum address target label is
129 after BASE. */
130 unsigned max_after_base: 1; /* maximum address target label is
131 after BASE. */
132 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
133 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
134 unsigned : 2;
135 unsigned scale : 8;
136 } addr_diff_vec_flags;
137
138 /* Structure used to describe the attributes of a MEM. These are hashed
139 so MEMs that the same attributes share a data structure. This means
140 they cannot be modified in place. */
141 typedef struct GTY(()) mem_attrs
142 {
143 /* The expression that the MEM accesses, or null if not known.
144 This expression might be larger than the memory reference itself.
145 (In other words, the MEM might access only part of the object.) */
146 tree expr;
147
148 /* The offset of the memory reference from the start of EXPR.
149 Only valid if OFFSET_KNOWN_P. */
150 HOST_WIDE_INT offset;
151
152 /* The size of the memory reference in bytes. Only valid if
153 SIZE_KNOWN_P. */
154 HOST_WIDE_INT size;
155
156 /* The alias set of the memory reference. */
157 alias_set_type alias;
158
159 /* The alignment of the reference in bits. Always a multiple of
160 BITS_PER_UNIT. Note that EXPR may have a stricter alignment
161 than the memory reference itself. */
162 unsigned int align;
163
164 /* The address space that the memory reference uses. */
165 unsigned char addrspace;
166
167 /* True if OFFSET is known. */
168 bool offset_known_p;
169
170 /* True if SIZE is known. */
171 bool size_known_p;
172 } mem_attrs;
173
174 /* Structure used to describe the attributes of a REG in similar way as
175 mem_attrs does for MEM above. Note that the OFFSET field is calculated
176 in the same way as for mem_attrs, rather than in the same way as a
177 SUBREG_BYTE. For example, if a big-endian target stores a byte
178 object in the low part of a 4-byte register, the OFFSET field
179 will be -3 rather than 0. */
180
181 typedef struct GTY(()) reg_attrs {
182 tree decl; /* decl corresponding to REG. */
183 HOST_WIDE_INT offset; /* Offset from start of DECL. */
184 } reg_attrs;
185
186 /* Common union for an element of an rtx. */
187
188 union rtunion_def
189 {
190 int rt_int;
191 unsigned int rt_uint;
192 const char *rt_str;
193 rtx rt_rtx;
194 rtvec rt_rtvec;
195 enum machine_mode rt_type;
196 addr_diff_vec_flags rt_addr_diff_vec_flags;
197 struct cselib_val_struct *rt_cselib;
198 tree rt_tree;
199 basic_block rt_bb;
200 mem_attrs *rt_mem;
201 reg_attrs *rt_reg;
202 struct constant_descriptor_rtx *rt_constant;
203 struct dw_cfi_struct *rt_cfi;
204 };
205 typedef union rtunion_def rtunion;
206
207 /* This structure remembers the position of a SYMBOL_REF within an
208 object_block structure. A SYMBOL_REF only provides this information
209 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
210 struct GTY(()) block_symbol {
211 /* The usual SYMBOL_REF fields. */
212 rtunion GTY ((skip)) fld[3];
213
214 /* The block that contains this object. */
215 struct object_block *block;
216
217 /* The offset of this object from the start of its block. It is negative
218 if the symbol has not yet been assigned an offset. */
219 HOST_WIDE_INT offset;
220 };
221
222 /* Describes a group of objects that are to be placed together in such
223 a way that their relative positions are known. */
224 struct GTY(()) object_block {
225 /* The section in which these objects should be placed. */
226 section *sect;
227
228 /* The alignment of the first object, measured in bits. */
229 unsigned int alignment;
230
231 /* The total size of the objects, measured in bytes. */
232 HOST_WIDE_INT size;
233
234 /* The SYMBOL_REFs for each object. The vector is sorted in
235 order of increasing offset and the following conditions will
236 hold for each element X:
237
238 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
239 !SYMBOL_REF_ANCHOR_P (X)
240 SYMBOL_REF_BLOCK (X) == [address of this structure]
241 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
242 VEC(rtx,gc) *objects;
243
244 /* All the anchor SYMBOL_REFs used to address these objects, sorted
245 in order of increasing offset, and then increasing TLS model.
246 The following conditions will hold for each element X in this vector:
247
248 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
249 SYMBOL_REF_ANCHOR_P (X)
250 SYMBOL_REF_BLOCK (X) == [address of this structure]
251 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
252 VEC(rtx,gc) *anchors;
253 };
254
255 /* RTL expression ("rtx"). */
256
257 struct GTY((chain_next ("RTX_NEXT (&%h)"),
258 chain_prev ("RTX_PREV (&%h)"), variable_size)) rtx_def {
259 /* The kind of expression this is. */
260 ENUM_BITFIELD(rtx_code) code: 16;
261
262 /* The kind of value the expression has. */
263 ENUM_BITFIELD(machine_mode) mode : 8;
264
265 /* 1 in a MEM if we should keep the alias set for this mem unchanged
266 when we access a component.
267 1 in a CALL_INSN if it is a sibling call.
268 1 in a SET that is for a return.
269 In a CODE_LABEL, part of the two-bit alternate entry field.
270 1 in a CONCAT is VAL_EXPR_IS_COPIED in var-tracking.c.
271 1 in a VALUE is SP_BASED_VALUE_P in cselib.c. */
272 unsigned int jump : 1;
273 /* In a CODE_LABEL, part of the two-bit alternate entry field.
274 1 in a MEM if it cannot trap.
275 1 in a CALL_INSN logically equivalent to
276 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
277 unsigned int call : 1;
278 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
279 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
280 1 in a SYMBOL_REF if it addresses something in the per-function
281 constants pool.
282 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
283 1 in a NOTE, or EXPR_LIST for a const call.
284 1 in a JUMP_INSN of an annulling branch.
285 1 in a CONCAT is VAL_EXPR_IS_CLOBBERED in var-tracking.c.
286 1 in a preserved VALUE is PRESERVED_VALUE_P in cselib.c. */
287 unsigned int unchanging : 1;
288 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
289 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
290 if it has been deleted.
291 1 in a REG expression if corresponds to a variable declared by the user,
292 0 for an internally generated temporary.
293 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
294 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
295 non-local label.
296 In a SYMBOL_REF, this flag is used for machine-specific purposes.
297 In a PREFETCH, this flag indicates that it should be considered a scheduling
298 barrier.
299 1 in a CONCAT is VAL_NEEDS_RESOLUTION in var-tracking.c. */
300 unsigned int volatil : 1;
301 /* 1 in a REG if the register is used only in exit code a loop.
302 1 in a SUBREG expression if was generated from a variable with a
303 promoted mode.
304 1 in a CODE_LABEL if the label is used for nonlocal gotos
305 and must not be deleted even if its count is zero.
306 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
307 together with the preceding insn. Valid only within sched.
308 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
309 from the target of a branch. Valid from reorg until end of compilation;
310 cleared before used.
311
312 The name of the field is historical. It used to be used in MEMs
313 to record whether the MEM accessed part of a structure. */
314 unsigned int in_struct : 1;
315 /* At the end of RTL generation, 1 if this rtx is used. This is used for
316 copying shared structure. See `unshare_all_rtl'.
317 In a REG, this is not needed for that purpose, and used instead
318 in `leaf_renumber_regs_insn'.
319 1 in a SYMBOL_REF, means that emit_library_call
320 has used it as the function.
321 1 in a CONCAT is VAL_HOLDS_TRACK_EXPR in var-tracking.c.
322 1 in a VALUE or DEBUG_EXPR is VALUE_RECURSED_INTO in var-tracking.c. */
323 unsigned int used : 1;
324 /* 1 in an INSN or a SET if this rtx is related to the call frame,
325 either changing how we compute the frame address or saving and
326 restoring registers in the prologue and epilogue.
327 1 in a REG or MEM if it is a pointer.
328 1 in a SYMBOL_REF if it addresses something in the per-function
329 constant string pool.
330 1 in a VALUE is VALUE_CHANGED in var-tracking.c. */
331 unsigned frame_related : 1;
332 /* 1 in a REG or PARALLEL that is the current function's return value.
333 1 in a SYMBOL_REF for a weak symbol.
334 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P.
335 1 in a CONCAT is VAL_EXPR_HAS_REVERSE in var-tracking.c.
336 1 in a VALUE or DEBUG_EXPR is NO_LOC_P in var-tracking.c. */
337 unsigned return_val : 1;
338
339 /* The first element of the operands of this rtx.
340 The number of operands and their types are controlled
341 by the `code' field, according to rtl.def. */
342 union u {
343 rtunion fld[1];
344 HOST_WIDE_INT hwint[1];
345 struct block_symbol block_sym;
346 struct real_value rv;
347 struct fixed_value fv;
348 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
349 };
350
351 /* The size in bytes of an rtx header (code, mode and flags). */
352 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
353
354 /* The size in bytes of an rtx with code CODE. */
355 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
356
357 #define NULL_RTX (rtx) 0
358
359 /* The "next" and "previous" RTX, relative to this one. */
360
361 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
362 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
363
364 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
365 */
366 #define RTX_PREV(X) ((INSN_P (X) \
367 || NOTE_P (X) \
368 || BARRIER_P (X) \
369 || LABEL_P (X)) \
370 && PREV_INSN (X) != NULL \
371 && NEXT_INSN (PREV_INSN (X)) == X \
372 ? PREV_INSN (X) : NULL)
373
374 /* Define macros to access the `code' field of the rtx. */
375
376 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
377 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
378
379 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode)
380 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
381
382 /* RTL vector. These appear inside RTX's when there is a need
383 for a variable number of things. The principle use is inside
384 PARALLEL expressions. */
385
386 struct GTY((variable_size)) rtvec_def {
387 int num_elem; /* number of elements */
388 rtx GTY ((length ("%h.num_elem"))) elem[1];
389 };
390
391 #define NULL_RTVEC (rtvec) 0
392
393 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
394 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
395
396 /* Predicate yielding nonzero iff X is an rtx for a register. */
397 #define REG_P(X) (GET_CODE (X) == REG)
398
399 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
400 #define MEM_P(X) (GET_CODE (X) == MEM)
401
402 /* Match CONST_*s that can represent compile-time constant integers. */
403 #define CASE_CONST_SCALAR_INT \
404 case CONST_INT: \
405 case CONST_DOUBLE
406
407 /* Match CONST_*s for which pointer equality corresponds to value equality. */
408 #define CASE_CONST_UNIQUE \
409 case CONST_INT: \
410 case CONST_DOUBLE: \
411 case CONST_FIXED
412
413 /* Match all CONST_* rtxes. */
414 #define CASE_CONST_ANY \
415 case CONST_INT: \
416 case CONST_DOUBLE: \
417 case CONST_FIXED: \
418 case CONST_VECTOR
419
420 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
421 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
422
423 /* Predicate yielding nonzero iff X is an rtx for a constant fixed-point. */
424 #define CONST_FIXED_P(X) (GET_CODE (X) == CONST_FIXED)
425
426 /* Predicate yielding true iff X is an rtx for a double-int
427 or floating point constant. */
428 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
429
430 /* Predicate yielding true iff X is an rtx for a double-int. */
431 #define CONST_DOUBLE_AS_INT_P(X) \
432 (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == VOIDmode)
433
434 /* Predicate yielding true iff X is an rtx for a double-int. */
435 #define CONST_DOUBLE_AS_FLOAT_P(X) \
436 (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != VOIDmode)
437
438 /* Predicate yielding nonzero iff X is a label insn. */
439 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
440
441 /* Predicate yielding nonzero iff X is a jump insn. */
442 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
443
444 /* Predicate yielding nonzero iff X is a call insn. */
445 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
446
447 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
448 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
449
450 /* Predicate yielding nonzero iff X is a debug note/insn. */
451 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
452
453 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
454 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
455
456 /* Nonzero if DEBUG_INSN_P may possibly hold. */
457 #define MAY_HAVE_DEBUG_INSNS (flag_var_tracking_assignments)
458
459 /* Predicate yielding nonzero iff X is a real insn. */
460 #define INSN_P(X) \
461 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
462
463 /* Predicate yielding nonzero iff X is a note insn. */
464 #define NOTE_P(X) (GET_CODE (X) == NOTE)
465
466 /* Predicate yielding nonzero iff X is a barrier insn. */
467 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
468
469 /* Predicate yielding nonzero iff X is a data for a jump table. */
470 #define JUMP_TABLE_DATA_P(INSN) \
471 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
472 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
473
474 /* Predicate yielding nonzero iff X is a return or simple_return. */
475 #define ANY_RETURN_P(X) \
476 (GET_CODE (X) == RETURN || GET_CODE (X) == SIMPLE_RETURN)
477
478 /* 1 if X is a unary operator. */
479
480 #define UNARY_P(X) \
481 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
482
483 /* 1 if X is a binary operator. */
484
485 #define BINARY_P(X) \
486 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
487
488 /* 1 if X is an arithmetic operator. */
489
490 #define ARITHMETIC_P(X) \
491 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
492 == RTX_ARITHMETIC_RESULT)
493
494 /* 1 if X is an arithmetic operator. */
495
496 #define COMMUTATIVE_ARITH_P(X) \
497 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
498
499 /* 1 if X is a commutative arithmetic operator or a comparison operator.
500 These two are sometimes selected together because it is possible to
501 swap the two operands. */
502
503 #define SWAPPABLE_OPERANDS_P(X) \
504 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
505 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
506 | (1 << RTX_COMPARE)))
507
508 /* 1 if X is a non-commutative operator. */
509
510 #define NON_COMMUTATIVE_P(X) \
511 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
512 == RTX_NON_COMMUTATIVE_RESULT)
513
514 /* 1 if X is a commutative operator on integers. */
515
516 #define COMMUTATIVE_P(X) \
517 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
518 == RTX_COMMUTATIVE_RESULT)
519
520 /* 1 if X is a relational operator. */
521
522 #define COMPARISON_P(X) \
523 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
524
525 /* 1 if X is a constant value that is an integer. */
526
527 #define CONSTANT_P(X) \
528 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
529
530 /* 1 if X can be used to represent an object. */
531 #define OBJECT_P(X) \
532 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
533
534 /* General accessor macros for accessing the fields of an rtx. */
535
536 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
537 /* The bit with a star outside the statement expr and an & inside is
538 so that N can be evaluated only once. */
539 #define RTL_CHECK1(RTX, N, C1) __extension__ \
540 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
541 const enum rtx_code _code = GET_CODE (_rtx); \
542 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
543 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
544 __FUNCTION__); \
545 if (GET_RTX_FORMAT(_code)[_n] != C1) \
546 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
547 __FUNCTION__); \
548 &_rtx->u.fld[_n]; }))
549
550 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
551 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
552 const enum rtx_code _code = GET_CODE (_rtx); \
553 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
554 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
555 __FUNCTION__); \
556 if (GET_RTX_FORMAT(_code)[_n] != C1 \
557 && GET_RTX_FORMAT(_code)[_n] != C2) \
558 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
559 __FUNCTION__); \
560 &_rtx->u.fld[_n]; }))
561
562 #define RTL_CHECKC1(RTX, N, C) __extension__ \
563 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
564 if (GET_CODE (_rtx) != (C)) \
565 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
566 __FUNCTION__); \
567 &_rtx->u.fld[_n]; }))
568
569 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
570 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
571 const enum rtx_code _code = GET_CODE (_rtx); \
572 if (_code != (C1) && _code != (C2)) \
573 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
574 __FUNCTION__); \
575 &_rtx->u.fld[_n]; }))
576
577 #define RTVEC_ELT(RTVEC, I) __extension__ \
578 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
579 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
580 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
581 __FUNCTION__); \
582 &_rtvec->elem[_i]; }))
583
584 #define XWINT(RTX, N) __extension__ \
585 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
586 const enum rtx_code _code = GET_CODE (_rtx); \
587 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
588 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
589 __FUNCTION__); \
590 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
591 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
592 __FUNCTION__); \
593 &_rtx->u.hwint[_n]; }))
594
595 #define XCWINT(RTX, N, C) __extension__ \
596 (*({ __typeof (RTX) const _rtx = (RTX); \
597 if (GET_CODE (_rtx) != (C)) \
598 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
599 __FUNCTION__); \
600 &_rtx->u.hwint[N]; }))
601
602 #define XCMWINT(RTX, N, C, M) __extension__ \
603 (*({ __typeof (RTX) const _rtx = (RTX); \
604 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
605 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
606 __LINE__, __FUNCTION__); \
607 &_rtx->u.hwint[N]; }))
608
609 #define XCNMPRV(RTX, C, M) __extension__ \
610 ({ __typeof (RTX) const _rtx = (RTX); \
611 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
612 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
613 __LINE__, __FUNCTION__); \
614 &_rtx->u.rv; })
615
616 #define XCNMPFV(RTX, C, M) __extension__ \
617 ({ __typeof (RTX) const _rtx = (RTX); \
618 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
619 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
620 __LINE__, __FUNCTION__); \
621 &_rtx->u.fv; })
622
623 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
624 ({ __typeof (RTX) const _symbol = (RTX); \
625 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
626 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
627 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
628 __FUNCTION__); \
629 &_symbol->u.block_sym; })
630
631 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
632 const char *)
633 ATTRIBUTE_NORETURN;
634 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
635 const char *)
636 ATTRIBUTE_NORETURN;
637 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
638 int, const char *)
639 ATTRIBUTE_NORETURN;
640 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
641 int, const char *)
642 ATTRIBUTE_NORETURN;
643 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
644 const char *, int, const char *)
645 ATTRIBUTE_NORETURN;
646 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
647 bool, const char *, int, const char *)
648 ATTRIBUTE_NORETURN;
649 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
650 ATTRIBUTE_NORETURN;
651 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
652 const char *)
653 ATTRIBUTE_NORETURN;
654
655 #else /* not ENABLE_RTL_CHECKING */
656
657 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
658 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
659 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
660 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
661 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
662 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
663 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
664 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
665 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
666 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
667 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
668 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
669
670 #endif
671
672 /* General accessor macros for accessing the flags of an rtx. */
673
674 /* Access an individual rtx flag, with no checking of any kind. */
675 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
676
677 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
678 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
679 ({ __typeof (RTX) const _rtx = (RTX); \
680 if (GET_CODE(_rtx) != C1) \
681 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
682 __FUNCTION__); \
683 _rtx; })
684
685 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
686 ({ __typeof (RTX) const _rtx = (RTX); \
687 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
688 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
689 __FUNCTION__); \
690 _rtx; })
691
692 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
693 ({ __typeof (RTX) const _rtx = (RTX); \
694 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
695 && GET_CODE(_rtx) != C3) \
696 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
697 __FUNCTION__); \
698 _rtx; })
699
700 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
701 ({ __typeof (RTX) const _rtx = (RTX); \
702 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
703 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
704 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
705 __FUNCTION__); \
706 _rtx; })
707
708 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
709 ({ __typeof (RTX) const _rtx = (RTX); \
710 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
711 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
712 && GET_CODE(_rtx) != C5) \
713 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
714 __FUNCTION__); \
715 _rtx; })
716
717 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
718 __extension__ \
719 ({ __typeof (RTX) const _rtx = (RTX); \
720 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
721 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
722 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
723 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
724 __FUNCTION__); \
725 _rtx; })
726
727 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
728 __extension__ \
729 ({ __typeof (RTX) const _rtx = (RTX); \
730 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
731 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
732 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
733 && GET_CODE(_rtx) != C7) \
734 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
735 __FUNCTION__); \
736 _rtx; })
737
738 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
739 __extension__ \
740 ({ __typeof (RTX) const _rtx = (RTX); \
741 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
742 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
743 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
744 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
745 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
746 __FUNCTION__); \
747 _rtx; })
748
749 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
750 int, const char *)
751 ATTRIBUTE_NORETURN
752 ;
753
754 #else /* not ENABLE_RTL_FLAG_CHECKING */
755
756 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
757 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
758 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
759 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
760 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
761 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
762 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
763 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
764 #endif
765
766 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
767 #define XUINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_uint)
768 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
769 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
770 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
771 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
772 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
773 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
774 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
775 #define XCFI(RTX, N) (RTL_CHECK1 (RTX, N, 'C').rt_cfi)
776
777 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
778 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
779
780 /* These are like XINT, etc. except that they expect a '0' field instead
781 of the normal type code. */
782
783 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
784 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
785 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
786 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
787 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
788 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
789 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
790 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
791 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
792 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
793 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
794 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
795 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
796
797 /* Access a '0' field with any type. */
798 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
799
800 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
801 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
802 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
803 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
804 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
805 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
806 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
807 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
808 #define XCCFI(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cfi)
809 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
810
811 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
812 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
813
814 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
815 \f
816 /* ACCESS MACROS for particular fields of insns. */
817
818 /* Holds a unique number for each insn.
819 These are not necessarily sequentially increasing. */
820 #define INSN_UID(INSN) XINT (INSN, 0)
821
822 /* Chain insns together in sequence. */
823 #define PREV_INSN(INSN) XEXP (INSN, 1)
824 #define NEXT_INSN(INSN) XEXP (INSN, 2)
825
826 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
827
828 /* The body of an insn. */
829 #define PATTERN(INSN) XEXP (INSN, 4)
830
831 #define INSN_LOCATION(INSN) XUINT (INSN, 5)
832
833 #define INSN_HAS_LOCATION(INSN) ((LOCATION_LOCUS (INSN_LOCATION (INSN)))\
834 != UNKNOWN_LOCATION)
835
836 /* LOCATION of an RTX if relevant. */
837 #define RTL_LOCATION(X) (INSN_P (X) ? \
838 INSN_LOCATION (X) : UNKNOWN_LOCATION)
839
840 /* Code number of instruction, from when it was recognized.
841 -1 means this instruction has not been recognized yet. */
842 #define INSN_CODE(INSN) XINT (INSN, 6)
843
844 #define RTX_FRAME_RELATED_P(RTX) \
845 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
846 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
847
848 /* 1 if RTX is an insn that has been deleted. */
849 #define INSN_DELETED_P(RTX) \
850 (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
851 CALL_INSN, JUMP_INSN, \
852 CODE_LABEL, BARRIER, NOTE)->volatil)
853
854 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
855 TREE_READONLY. */
856 #define RTL_CONST_CALL_P(RTX) \
857 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
858
859 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
860 DECL_PURE_P. */
861 #define RTL_PURE_CALL_P(RTX) \
862 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
863
864 /* 1 if RTX is a call to a const or pure function. */
865 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
866 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
867
868 /* 1 if RTX is a call to a looping const or pure function. Built from
869 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
870 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
871 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
872
873 /* 1 if RTX is a call_insn for a sibling call. */
874 #define SIBLING_CALL_P(RTX) \
875 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
876
877 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
878 #define INSN_ANNULLED_BRANCH_P(RTX) \
879 (RTL_FLAG_CHECK1("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN)->unchanging)
880
881 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
882 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
883 executed if the branch is taken. For annulled branches with this bit
884 clear, the insn should be executed only if the branch is not taken. */
885 #define INSN_FROM_TARGET_P(RTX) \
886 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
887
888 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
889 See the comments for ADDR_DIFF_VEC in rtl.def. */
890 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
891
892 /* In a VALUE, the value cselib has assigned to RTX.
893 This is a "struct cselib_val_struct", see cselib.h. */
894 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
895
896 /* Holds a list of notes on what this insn does to various REGs.
897 It is a chain of EXPR_LIST rtx's, where the second operand is the
898 chain pointer and the first operand is the REG being described.
899 The mode field of the EXPR_LIST contains not a real machine mode
900 but a value from enum reg_note. */
901 #define REG_NOTES(INSN) XEXP(INSN, 7)
902
903 /* In an ENTRY_VALUE this is the DECL_INCOMING_RTL of the argument in
904 question. */
905 #define ENTRY_VALUE_EXP(RTX) (RTL_CHECKC1 (RTX, 0, ENTRY_VALUE).rt_rtx)
906
907 enum reg_note
908 {
909 #define DEF_REG_NOTE(NAME) NAME,
910 #include "reg-notes.def"
911 #undef DEF_REG_NOTE
912 REG_NOTE_MAX
913 };
914
915 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
916 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
917 #define PUT_REG_NOTE_KIND(LINK, KIND) \
918 PUT_MODE (LINK, (enum machine_mode) (KIND))
919
920 /* Names for REG_NOTE's in EXPR_LIST insn's. */
921
922 extern const char * const reg_note_name[];
923 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
924
925 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
926 USE and CLOBBER expressions.
927 USE expressions list the registers filled with arguments that
928 are passed to the function.
929 CLOBBER expressions document the registers explicitly clobbered
930 by this CALL_INSN.
931 Pseudo registers can not be mentioned in this list. */
932 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
933
934 /* The label-number of a code-label. The assembler label
935 is made from `L' and the label-number printed in decimal.
936 Label numbers are unique in a compilation. */
937 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
938
939 /* In a NOTE that is a line number, this is a string for the file name that the
940 line is in. We use the same field to record block numbers temporarily in
941 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
942 between ints and pointers if we use a different macro for the block number.)
943 */
944
945 /* Opaque data. */
946 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
947 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
948 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
949 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
950 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
951 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
952 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
953 #define NOTE_CFI(INSN) XCCFI (INSN, 4, NOTE)
954 #define NOTE_LABEL_NUMBER(INSN) XCINT (INSN, 4, NOTE)
955
956 /* In a NOTE that is a line number, this is the line number.
957 Other kinds of NOTEs are identified by negative numbers here. */
958 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
959
960 /* Nonzero if INSN is a note marking the beginning of a basic block. */
961 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
962 (GET_CODE (INSN) == NOTE \
963 && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
964
965 /* Variable declaration and the location of a variable. */
966 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
967 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
968
969 /* Initialization status of the variable in the location. Status
970 can be unknown, uninitialized or initialized. See enumeration
971 type below. */
972 #define PAT_VAR_LOCATION_STATUS(PAT) \
973 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
974
975 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
976 #define NOTE_VAR_LOCATION_DECL(NOTE) \
977 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
978 #define NOTE_VAR_LOCATION_LOC(NOTE) \
979 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
980 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
981 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
982
983 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
984 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
985
986 /* Accessors for a tree-expanded var location debug insn. */
987 #define INSN_VAR_LOCATION_DECL(INSN) \
988 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
989 #define INSN_VAR_LOCATION_LOC(INSN) \
990 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
991 #define INSN_VAR_LOCATION_STATUS(INSN) \
992 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
993
994 /* Expand to the RTL that denotes an unknown variable location in a
995 DEBUG_INSN. */
996 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
997
998 /* Determine whether X is such an unknown location. */
999 #define VAR_LOC_UNKNOWN_P(X) \
1000 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
1001
1002 /* 1 if RTX is emitted after a call, but it should take effect before
1003 the call returns. */
1004 #define NOTE_DURING_CALL_P(RTX) \
1005 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
1006
1007 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
1008 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
1009
1010 /* VAR_DECL/PARM_DECL DEBUG_IMPLICIT_PTR takes address of. */
1011 #define DEBUG_IMPLICIT_PTR_DECL(RTX) XCTREE (RTX, 0, DEBUG_IMPLICIT_PTR)
1012
1013 /* PARM_DECL DEBUG_PARAMETER_REF references. */
1014 #define DEBUG_PARAMETER_REF_DECL(RTX) XCTREE (RTX, 0, DEBUG_PARAMETER_REF)
1015
1016 /* Codes that appear in the NOTE_KIND field for kinds of notes
1017 that are not line numbers. These codes are all negative.
1018
1019 Notice that we do not try to use zero here for any of
1020 the special note codes because sometimes the source line
1021 actually can be zero! This happens (for example) when we
1022 are generating code for the per-translation-unit constructor
1023 and destructor routines for some C++ translation unit. */
1024
1025 enum insn_note
1026 {
1027 #define DEF_INSN_NOTE(NAME) NAME,
1028 #include "insn-notes.def"
1029 #undef DEF_INSN_NOTE
1030
1031 NOTE_INSN_MAX
1032 };
1033
1034 /* Names for NOTE insn's other than line numbers. */
1035
1036 extern const char * const note_insn_name[NOTE_INSN_MAX];
1037 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1038 (note_insn_name[(NOTE_CODE)])
1039
1040 /* The name of a label, in case it corresponds to an explicit label
1041 in the input source code. */
1042 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1043
1044 /* In jump.c, each label contains a count of the number
1045 of LABEL_REFs that point at it, so unused labels can be deleted. */
1046 #define LABEL_NUSES(RTX) XCINT (RTX, 5, CODE_LABEL)
1047
1048 /* Labels carry a two-bit field composed of the ->jump and ->call
1049 bits. This field indicates whether the label is an alternate
1050 entry point, and if so, what kind. */
1051 enum label_kind
1052 {
1053 LABEL_NORMAL = 0, /* ordinary label */
1054 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1055 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1056 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1057 };
1058
1059 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1060
1061 /* Retrieve the kind of LABEL. */
1062 #define LABEL_KIND(LABEL) __extension__ \
1063 ({ __typeof (LABEL) const _label = (LABEL); \
1064 if (GET_CODE (_label) != CODE_LABEL) \
1065 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1066 __FUNCTION__); \
1067 (enum label_kind) ((_label->jump << 1) | _label->call); })
1068
1069 /* Set the kind of LABEL. */
1070 #define SET_LABEL_KIND(LABEL, KIND) do { \
1071 __typeof (LABEL) const _label = (LABEL); \
1072 const unsigned int _kind = (KIND); \
1073 if (GET_CODE (_label) != CODE_LABEL) \
1074 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1075 __FUNCTION__); \
1076 _label->jump = ((_kind >> 1) & 1); \
1077 _label->call = (_kind & 1); \
1078 } while (0)
1079
1080 #else
1081
1082 /* Retrieve the kind of LABEL. */
1083 #define LABEL_KIND(LABEL) \
1084 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1085
1086 /* Set the kind of LABEL. */
1087 #define SET_LABEL_KIND(LABEL, KIND) do { \
1088 rtx const _label = (LABEL); \
1089 const unsigned int _kind = (KIND); \
1090 _label->jump = ((_kind >> 1) & 1); \
1091 _label->call = (_kind & 1); \
1092 } while (0)
1093
1094 #endif /* rtl flag checking */
1095
1096 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1097
1098 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1099 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1100 be decremented and possibly the label can be deleted. */
1101 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1102
1103 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1104 goes through all the LABEL_REFs that jump to that label. The chain
1105 eventually winds up at the CODE_LABEL: it is circular. */
1106 #define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
1107 \f
1108 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1109 be used on RHS. Use SET_REGNO to change the value. */
1110 #define REGNO(RTX) (rhs_regno(RTX))
1111 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1112 #define SET_REGNO_RAW(RTX,N) (XCUINT (RTX, 0, REG) = N)
1113
1114 /* ORIGINAL_REGNO holds the number the register originally had; for a
1115 pseudo register turned into a hard reg this will hold the old pseudo
1116 register number. */
1117 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1118
1119 /* Force the REGNO macro to only be used on the lhs. */
1120 static inline unsigned int
1121 rhs_regno (const_rtx x)
1122 {
1123 return XCUINT (x, 0, REG);
1124 }
1125
1126
1127 /* 1 if RTX is a reg or parallel that is the current function's return
1128 value. */
1129 #define REG_FUNCTION_VALUE_P(RTX) \
1130 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1131
1132 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1133 #define REG_USERVAR_P(RTX) \
1134 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1135
1136 /* 1 if RTX is a reg that holds a pointer value. */
1137 #define REG_POINTER(RTX) \
1138 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1139
1140 /* 1 if RTX is a mem that holds a pointer value. */
1141 #define MEM_POINTER(RTX) \
1142 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1143
1144 /* 1 if the given register REG corresponds to a hard register. */
1145 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1146
1147 /* 1 if the given register number REG_NO corresponds to a hard register. */
1148 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1149
1150 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1151 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1152 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1153
1154 /* For a CONST_DOUBLE:
1155 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1156 low-order word and ..._HIGH the high-order.
1157 For a float, there is a REAL_VALUE_TYPE structure, and
1158 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1159 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1160 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1161 #define CONST_DOUBLE_REAL_VALUE(r) \
1162 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1163
1164 #define CONST_FIXED_VALUE(r) \
1165 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1166 #define CONST_FIXED_VALUE_HIGH(r) \
1167 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1168 #define CONST_FIXED_VALUE_LOW(r) \
1169 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1170
1171 /* For a CONST_VECTOR, return element #n. */
1172 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1173
1174 /* For a CONST_VECTOR, return the number of elements in a vector. */
1175 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1176
1177 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1178 SUBREG_BYTE extracts the byte-number. */
1179
1180 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1181 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1182
1183 /* in rtlanal.c */
1184 /* Return the right cost to give to an operation
1185 to make the cost of the corresponding register-to-register instruction
1186 N times that of a fast register-to-register instruction. */
1187 #define COSTS_N_INSNS(N) ((N) * 4)
1188
1189 /* Maximum cost of an rtl expression. This value has the special meaning
1190 not to use an rtx with this cost under any circumstances. */
1191 #define MAX_COST INT_MAX
1192
1193 /* A structure to hold all available cost information about an rtl
1194 expression. */
1195 struct full_rtx_costs
1196 {
1197 int speed;
1198 int size;
1199 };
1200
1201 /* Initialize a full_rtx_costs structure C to the maximum cost. */
1202 static inline void
1203 init_costs_to_max (struct full_rtx_costs *c)
1204 {
1205 c->speed = MAX_COST;
1206 c->size = MAX_COST;
1207 }
1208
1209 /* Initialize a full_rtx_costs structure C to zero cost. */
1210 static inline void
1211 init_costs_to_zero (struct full_rtx_costs *c)
1212 {
1213 c->speed = 0;
1214 c->size = 0;
1215 }
1216
1217 /* Compare two full_rtx_costs structures A and B, returning true
1218 if A < B when optimizing for speed. */
1219 static inline bool
1220 costs_lt_p (struct full_rtx_costs *a, struct full_rtx_costs *b,
1221 bool speed)
1222 {
1223 if (speed)
1224 return (a->speed < b->speed
1225 || (a->speed == b->speed && a->size < b->size));
1226 else
1227 return (a->size < b->size
1228 || (a->size == b->size && a->speed < b->speed));
1229 }
1230
1231 /* Increase both members of the full_rtx_costs structure C by the
1232 cost of N insns. */
1233 static inline void
1234 costs_add_n_insns (struct full_rtx_costs *c, int n)
1235 {
1236 c->speed += COSTS_N_INSNS (n);
1237 c->size += COSTS_N_INSNS (n);
1238 }
1239
1240 /* Information about an address. This structure is supposed to be able
1241 to represent all supported target addresses. Please extend it if it
1242 is not yet general enough. */
1243 struct address_info {
1244 /* The mode of the value being addressed, or VOIDmode if this is
1245 a load-address operation with no known address mode. */
1246 enum machine_mode mode;
1247
1248 /* The address space. */
1249 addr_space_t as;
1250
1251 /* A pointer to the top-level address. */
1252 rtx *outer;
1253
1254 /* A pointer to the inner address, after all address mutations
1255 have been stripped from the top-level address. It can be one
1256 of the following:
1257
1258 - A {PRE,POST}_{INC,DEC} of *BASE. SEGMENT, INDEX and DISP are null.
1259
1260 - A {PRE,POST}_MODIFY of *BASE. In this case either INDEX or DISP
1261 points to the step value, depending on whether the step is variable
1262 or constant respectively. SEGMENT is null.
1263
1264 - A plain sum of the form SEGMENT + BASE + INDEX + DISP,
1265 with null fields evaluating to 0. */
1266 rtx *inner;
1267
1268 /* Components that make up *INNER. Each one may be null or nonnull.
1269 When nonnull, their meanings are as follows:
1270
1271 - *SEGMENT is the "segment" of memory to which the address refers.
1272 This value is entirely target-specific and is only called a "segment"
1273 because that's its most typical use. It contains exactly one UNSPEC,
1274 pointed to by SEGMENT_TERM. The contents of *SEGMENT do not need
1275 reloading.
1276
1277 - *BASE is a variable expression representing a base address.
1278 It contains exactly one REG, SUBREG or MEM, pointed to by BASE_TERM.
1279
1280 - *INDEX is a variable expression representing an index value.
1281 It may be a scaled expression, such as a MULT. It has exactly
1282 one REG, SUBREG or MEM, pointed to by INDEX_TERM.
1283
1284 - *DISP is a constant, possibly mutated. DISP_TERM points to the
1285 unmutated RTX_CONST_OBJ. */
1286 rtx *segment;
1287 rtx *base;
1288 rtx *index;
1289 rtx *disp;
1290
1291 rtx *segment_term;
1292 rtx *base_term;
1293 rtx *index_term;
1294 rtx *disp_term;
1295
1296 /* In a {PRE,POST}_MODIFY address, this points to a second copy
1297 of BASE_TERM, otherwise it is null. */
1298 rtx *base_term2;
1299
1300 /* ADDRESS if this structure describes an address operand, MEM if
1301 it describes a MEM address. */
1302 enum rtx_code addr_outer_code;
1303
1304 /* If BASE is nonnull, this is the code of the rtx that contains it. */
1305 enum rtx_code base_outer_code;
1306
1307 /* True if this is an RTX_AUTOINC address. */
1308 bool autoinc_p;
1309 };
1310
1311 extern void init_rtlanal (void);
1312 extern int rtx_cost (rtx, enum rtx_code, int, bool);
1313 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1314 extern void get_full_rtx_cost (rtx, enum rtx_code, int,
1315 struct full_rtx_costs *);
1316 extern unsigned int subreg_lsb (const_rtx);
1317 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1318 unsigned int);
1319 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1320 unsigned int, enum machine_mode);
1321 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1322 unsigned int, enum machine_mode);
1323 extern unsigned int subreg_regno (const_rtx);
1324 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1325 unsigned int, enum machine_mode);
1326 extern unsigned int subreg_nregs (const_rtx);
1327 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1328 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1329 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1330 extern bool constant_pool_constant_p (rtx);
1331 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1332 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1333 extern void split_double (rtx, rtx *, rtx *);
1334 extern rtx *strip_address_mutations (rtx *, enum rtx_code * = 0);
1335 extern void decompose_address (struct address_info *, rtx *,
1336 enum machine_mode, addr_space_t, enum rtx_code);
1337 extern void decompose_lea_address (struct address_info *, rtx *);
1338 extern void decompose_mem_address (struct address_info *, rtx);
1339 extern void update_address (struct address_info *);
1340 extern HOST_WIDE_INT get_index_scale (const struct address_info *);
1341 extern enum rtx_code get_index_code (const struct address_info *);
1342
1343 #ifndef GENERATOR_FILE
1344 /* Return the cost of SET X. SPEED_P is true if optimizing for speed
1345 rather than size. */
1346
1347 static inline int
1348 set_rtx_cost (rtx x, bool speed_p)
1349 {
1350 return rtx_cost (x, INSN, 4, speed_p);
1351 }
1352
1353 /* Like set_rtx_cost, but return both the speed and size costs in C. */
1354
1355 static inline void
1356 get_full_set_rtx_cost (rtx x, struct full_rtx_costs *c)
1357 {
1358 get_full_rtx_cost (x, INSN, 4, c);
1359 }
1360
1361 /* Return the cost of moving X into a register, relative to the cost
1362 of a register move. SPEED_P is true if optimizing for speed rather
1363 than size. */
1364
1365 static inline int
1366 set_src_cost (rtx x, bool speed_p)
1367 {
1368 return rtx_cost (x, SET, 1, speed_p);
1369 }
1370
1371 /* Like set_src_cost, but return both the speed and size costs in C. */
1372
1373 static inline void
1374 get_full_set_src_cost (rtx x, struct full_rtx_costs *c)
1375 {
1376 get_full_rtx_cost (x, SET, 1, c);
1377 }
1378 #endif
1379
1380 /* 1 if RTX is a subreg containing a reg that is already known to be
1381 sign- or zero-extended from the mode of the subreg to the mode of
1382 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1383 extension.
1384
1385 When used as a LHS, is means that this extension must be done
1386 when assigning to SUBREG_REG. */
1387
1388 #define SUBREG_PROMOTED_VAR_P(RTX) \
1389 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1390
1391 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1392 do { \
1393 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1394 if ((VAL) < 0) \
1395 _rtx->volatil = 1; \
1396 else { \
1397 _rtx->volatil = 0; \
1398 _rtx->unchanging = (VAL); \
1399 } \
1400 } while (0)
1401
1402 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1403 this gives the necessary extensions:
1404 0 - signed
1405 1 - normal unsigned
1406 -1 - pointer unsigned, which most often can be handled like unsigned
1407 extension, except for generating instructions where we need to
1408 emit special code (ptr_extend insns) on some architectures. */
1409
1410 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1411 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1412 ? -1 : (int) (RTX)->unchanging)
1413
1414 /* Access various components of an ASM_OPERANDS rtx. */
1415
1416 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1417 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1418 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1419 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1420 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1421 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1422 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1423 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1424 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1425 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1426 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1427 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1428 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1429 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1430 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1431 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1432 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1433 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1434
1435 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1436 #define MEM_READONLY_P(RTX) \
1437 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1438
1439 /* 1 if RTX is a mem and we should keep the alias set for this mem
1440 unchanged when we access a component. Set to 1, or example, when we
1441 are already in a non-addressable component of an aggregate. */
1442 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1443 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1444
1445 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1446 #define MEM_VOLATILE_P(RTX) \
1447 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1448 ASM_INPUT)->volatil)
1449
1450 /* 1 if RTX is a mem that cannot trap. */
1451 #define MEM_NOTRAP_P(RTX) \
1452 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1453
1454 /* The memory attribute block. We provide access macros for each value
1455 in the block and provide defaults if none specified. */
1456 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1457
1458 /* The register attribute block. We provide access macros for each value
1459 in the block and provide defaults if none specified. */
1460 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1461
1462 #ifndef GENERATOR_FILE
1463 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1464 set, and may alias anything. Otherwise, the MEM can only alias
1465 MEMs in a conflicting alias set. This value is set in a
1466 language-dependent manner in the front-end, and should not be
1467 altered in the back-end. These set numbers are tested with
1468 alias_sets_conflict_p. */
1469 #define MEM_ALIAS_SET(RTX) (get_mem_attrs (RTX)->alias)
1470
1471 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1472 refer to part of a DECL. It may also be a COMPONENT_REF. */
1473 #define MEM_EXPR(RTX) (get_mem_attrs (RTX)->expr)
1474
1475 /* For a MEM rtx, true if its MEM_OFFSET is known. */
1476 #define MEM_OFFSET_KNOWN_P(RTX) (get_mem_attrs (RTX)->offset_known_p)
1477
1478 /* For a MEM rtx, the offset from the start of MEM_EXPR. */
1479 #define MEM_OFFSET(RTX) (get_mem_attrs (RTX)->offset)
1480
1481 /* For a MEM rtx, the address space. */
1482 #define MEM_ADDR_SPACE(RTX) (get_mem_attrs (RTX)->addrspace)
1483
1484 /* For a MEM rtx, true if its MEM_SIZE is known. */
1485 #define MEM_SIZE_KNOWN_P(RTX) (get_mem_attrs (RTX)->size_known_p)
1486
1487 /* For a MEM rtx, the size in bytes of the MEM. */
1488 #define MEM_SIZE(RTX) (get_mem_attrs (RTX)->size)
1489
1490 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1491 mode as a default when STRICT_ALIGNMENT, but not if not. */
1492 #define MEM_ALIGN(RTX) (get_mem_attrs (RTX)->align)
1493 #else
1494 #define MEM_ADDR_SPACE(RTX) ADDR_SPACE_GENERIC
1495 #endif
1496
1497 /* For a REG rtx, the decl it is known to refer to, if it is known to
1498 refer to part of a DECL. */
1499 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1500
1501 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1502 HOST_WIDE_INT. */
1503 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1504
1505 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1506 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1507 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1508 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1509 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1510 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1511 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1512 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1513
1514 /* 1 if RTX is a label_ref for a nonlocal label. */
1515 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1516 REG_LABEL_TARGET note. */
1517 #define LABEL_REF_NONLOCAL_P(RTX) \
1518 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1519
1520 /* 1 if RTX is a code_label that should always be considered to be needed. */
1521 #define LABEL_PRESERVE_P(RTX) \
1522 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1523
1524 /* During sched, 1 if RTX is an insn that must be scheduled together
1525 with the preceding insn. */
1526 #define SCHED_GROUP_P(RTX) \
1527 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1528 JUMP_INSN, CALL_INSN \
1529 )->in_struct)
1530
1531 /* For a SET rtx, SET_DEST is the place that is set
1532 and SET_SRC is the value it is set to. */
1533 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1534 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1535 #define SET_IS_RETURN_P(RTX) \
1536 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1537
1538 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1539 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1540 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1541
1542 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1543 conditionally executing the code on, COND_EXEC_CODE is the code
1544 to execute if the condition is true. */
1545 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1546 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1547
1548 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1549 constants pool. */
1550 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1551 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1552
1553 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1554 tree constant pool. This information is private to varasm.c. */
1555 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1556 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1557 (RTX), SYMBOL_REF)->frame_related)
1558
1559 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1560 #define SYMBOL_REF_FLAG(RTX) \
1561 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1562
1563 /* 1 if RTX is a symbol_ref that has been the library function in
1564 emit_library_call. */
1565 #define SYMBOL_REF_USED(RTX) \
1566 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1567
1568 /* 1 if RTX is a symbol_ref for a weak symbol. */
1569 #define SYMBOL_REF_WEAK(RTX) \
1570 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1571
1572 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1573 SYMBOL_REF_CONSTANT. */
1574 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1575
1576 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1577 pool symbol. */
1578 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1579 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1580
1581 /* The tree (decl or constant) associated with the symbol, or null. */
1582 #define SYMBOL_REF_DECL(RTX) \
1583 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1584
1585 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1586 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1587 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1588
1589 /* The rtx constant pool entry for a symbol, or null. */
1590 #define SYMBOL_REF_CONSTANT(RTX) \
1591 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1592
1593 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1594 information derivable from the tree decl associated with this symbol.
1595 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1596 decl. In some cases this is a bug. But beyond that, it's nice to cache
1597 this information to avoid recomputing it. Finally, this allows space for
1598 the target to store more than one bit of information, as with
1599 SYMBOL_REF_FLAG. */
1600 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1601
1602 /* These flags are common enough to be defined for all targets. They
1603 are computed by the default version of targetm.encode_section_info. */
1604
1605 /* Set if this symbol is a function. */
1606 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1607 #define SYMBOL_REF_FUNCTION_P(RTX) \
1608 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1609 /* Set if targetm.binds_local_p is true. */
1610 #define SYMBOL_FLAG_LOCAL (1 << 1)
1611 #define SYMBOL_REF_LOCAL_P(RTX) \
1612 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1613 /* Set if targetm.in_small_data_p is true. */
1614 #define SYMBOL_FLAG_SMALL (1 << 2)
1615 #define SYMBOL_REF_SMALL_P(RTX) \
1616 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1617 /* The three-bit field at [5:3] is true for TLS variables; use
1618 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1619 #define SYMBOL_FLAG_TLS_SHIFT 3
1620 #define SYMBOL_REF_TLS_MODEL(RTX) \
1621 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1622 /* Set if this symbol is not defined in this translation unit. */
1623 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1624 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1625 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1626 /* Set if this symbol has a block_symbol structure associated with it. */
1627 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1628 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1629 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1630 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1631 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1632 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1633 #define SYMBOL_REF_ANCHOR_P(RTX) \
1634 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1635
1636 /* Subsequent bits are available for the target to use. */
1637 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1638 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1639
1640 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1641 structure to which the symbol belongs, or NULL if it has not been
1642 assigned a block. */
1643 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1644
1645 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1646 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1647 RTX has not yet been assigned to a block, or it has not been given an
1648 offset within that block. */
1649 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1650
1651 /* True if RTX is flagged to be a scheduling barrier. */
1652 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1653 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1654
1655 /* Indicate whether the machine has any sort of auto increment addressing.
1656 If not, we can avoid checking for REG_INC notes. */
1657
1658 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1659 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1660 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1661 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1662 #define AUTO_INC_DEC
1663 #endif
1664
1665 /* Define a macro to look for REG_INC notes,
1666 but save time on machines where they never exist. */
1667
1668 #ifdef AUTO_INC_DEC
1669 #define FIND_REG_INC_NOTE(INSN, REG) \
1670 ((REG) != NULL_RTX && REG_P ((REG)) \
1671 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1672 : find_reg_note ((INSN), REG_INC, (REG)))
1673 #else
1674 #define FIND_REG_INC_NOTE(INSN, REG) 0
1675 #endif
1676
1677 #ifndef HAVE_PRE_INCREMENT
1678 #define HAVE_PRE_INCREMENT 0
1679 #endif
1680
1681 #ifndef HAVE_PRE_DECREMENT
1682 #define HAVE_PRE_DECREMENT 0
1683 #endif
1684
1685 #ifndef HAVE_POST_INCREMENT
1686 #define HAVE_POST_INCREMENT 0
1687 #endif
1688
1689 #ifndef HAVE_POST_DECREMENT
1690 #define HAVE_POST_DECREMENT 0
1691 #endif
1692
1693 #ifndef HAVE_POST_MODIFY_DISP
1694 #define HAVE_POST_MODIFY_DISP 0
1695 #endif
1696
1697 #ifndef HAVE_POST_MODIFY_REG
1698 #define HAVE_POST_MODIFY_REG 0
1699 #endif
1700
1701 #ifndef HAVE_PRE_MODIFY_DISP
1702 #define HAVE_PRE_MODIFY_DISP 0
1703 #endif
1704
1705 #ifndef HAVE_PRE_MODIFY_REG
1706 #define HAVE_PRE_MODIFY_REG 0
1707 #endif
1708
1709
1710 /* Some architectures do not have complete pre/post increment/decrement
1711 instruction sets, or only move some modes efficiently. These macros
1712 allow us to tune autoincrement generation. */
1713
1714 #ifndef USE_LOAD_POST_INCREMENT
1715 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1716 #endif
1717
1718 #ifndef USE_LOAD_POST_DECREMENT
1719 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1720 #endif
1721
1722 #ifndef USE_LOAD_PRE_INCREMENT
1723 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1724 #endif
1725
1726 #ifndef USE_LOAD_PRE_DECREMENT
1727 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1728 #endif
1729
1730 #ifndef USE_STORE_POST_INCREMENT
1731 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1732 #endif
1733
1734 #ifndef USE_STORE_POST_DECREMENT
1735 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1736 #endif
1737
1738 #ifndef USE_STORE_PRE_INCREMENT
1739 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1740 #endif
1741
1742 #ifndef USE_STORE_PRE_DECREMENT
1743 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1744 #endif
1745 \f
1746 /* Nonzero when we are generating CONCATs. */
1747 extern int generating_concat_p;
1748
1749 /* Nonzero when we are expanding trees to RTL. */
1750 extern int currently_expanding_to_rtl;
1751
1752 /* Generally useful functions. */
1753
1754 /* In explow.c */
1755 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1756 extern rtx plus_constant (enum machine_mode, rtx, HOST_WIDE_INT);
1757
1758 /* In rtl.c */
1759 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1760 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1761
1762 extern rtvec rtvec_alloc (int);
1763 extern rtvec shallow_copy_rtvec (rtvec);
1764 extern bool shared_const_p (const_rtx);
1765 extern rtx copy_rtx (rtx);
1766 extern void dump_rtx_statistics (void);
1767
1768 /* In emit-rtl.c */
1769 extern rtx copy_rtx_if_shared (rtx);
1770
1771 /* In rtl.c */
1772 extern unsigned int rtx_size (const_rtx);
1773 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1774 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1775 extern int rtx_equal_p (const_rtx, const_rtx);
1776 extern hashval_t iterative_hash_rtx (const_rtx, hashval_t);
1777
1778 /* In emit-rtl.c */
1779 extern rtvec gen_rtvec_v (int, rtx *);
1780 extern rtx gen_reg_rtx (enum machine_mode);
1781 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1782 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1783 extern rtx gen_reg_rtx_and_attrs (rtx);
1784 extern rtx gen_label_rtx (void);
1785 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1786
1787 /* In cse.c */
1788 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1789
1790 /* In emit-rtl.c */
1791 extern rtx gen_highpart (enum machine_mode, rtx);
1792 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1793 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1794
1795 /* In emit-rtl.c */
1796 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1797 extern bool paradoxical_subreg_p (const_rtx);
1798 extern int subreg_lowpart_p (const_rtx);
1799 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1800 enum machine_mode);
1801 extern unsigned int subreg_highpart_offset (enum machine_mode,
1802 enum machine_mode);
1803 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1804 extern rtx make_safe_from (rtx, rtx);
1805 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1806 addr_space_t);
1807 #define convert_memory_address(to_mode,x) \
1808 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1809 extern const char *get_insn_name (int);
1810 extern rtx get_last_insn_anywhere (void);
1811 extern rtx get_first_nonnote_insn (void);
1812 extern rtx get_last_nonnote_insn (void);
1813 extern void start_sequence (void);
1814 extern void push_to_sequence (rtx);
1815 extern void push_to_sequence2 (rtx, rtx);
1816 extern void end_sequence (void);
1817 extern double_int rtx_to_double_int (const_rtx);
1818 extern rtx immed_double_int_const (double_int, enum machine_mode);
1819 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1820 enum machine_mode);
1821
1822 /* In loop-iv.c */
1823
1824 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1825
1826 /* In varasm.c */
1827 extern rtx force_const_mem (enum machine_mode, rtx);
1828
1829 /* In varasm.c */
1830
1831 struct function;
1832 extern rtx get_pool_constant (rtx);
1833 extern rtx get_pool_constant_mark (rtx, bool *);
1834 extern enum machine_mode get_pool_mode (const_rtx);
1835 extern rtx simplify_subtraction (rtx);
1836 extern void decide_function_section (tree);
1837
1838 /* In function.c */
1839 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1840 #define ASLK_REDUCE_ALIGN 1
1841 #define ASLK_RECORD_PAD 2
1842 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, int);
1843 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT);
1844 extern rtx assign_stack_temp_for_type (enum machine_mode, HOST_WIDE_INT, tree);
1845 extern rtx assign_temp (tree, int, int);
1846
1847 /* In emit-rtl.c */
1848 extern rtx emit_insn_before (rtx, rtx);
1849 extern rtx emit_insn_before_noloc (rtx, rtx, basic_block);
1850 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1851 extern rtx emit_jump_insn_before (rtx, rtx);
1852 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1853 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1854 extern rtx emit_call_insn_before (rtx, rtx);
1855 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1856 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1857 extern rtx emit_debug_insn_before (rtx, rtx);
1858 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1859 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1860 extern rtx emit_barrier_before (rtx);
1861 extern rtx emit_label_before (rtx, rtx);
1862 extern rtx emit_note_before (enum insn_note, rtx);
1863 extern rtx emit_insn_after (rtx, rtx);
1864 extern rtx emit_insn_after_noloc (rtx, rtx, basic_block);
1865 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1866 extern rtx emit_jump_insn_after (rtx, rtx);
1867 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1868 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1869 extern rtx emit_call_insn_after (rtx, rtx);
1870 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1871 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1872 extern rtx emit_debug_insn_after (rtx, rtx);
1873 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1874 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1875 extern rtx emit_barrier_after (rtx);
1876 extern rtx emit_label_after (rtx, rtx);
1877 extern rtx emit_note_after (enum insn_note, rtx);
1878 extern rtx emit_insn (rtx);
1879 extern rtx emit_debug_insn (rtx);
1880 extern rtx emit_jump_insn (rtx);
1881 extern rtx emit_call_insn (rtx);
1882 extern rtx emit_label (rtx);
1883 extern rtx emit_barrier (void);
1884 extern rtx emit_note (enum insn_note);
1885 extern rtx emit_note_copy (rtx);
1886 extern rtx gen_clobber (rtx);
1887 extern rtx emit_clobber (rtx);
1888 extern rtx gen_use (rtx);
1889 extern rtx emit_use (rtx);
1890 extern rtx make_insn_raw (rtx);
1891 extern void add_function_usage_to (rtx, rtx);
1892 extern rtx last_call_insn (void);
1893 extern rtx previous_insn (rtx);
1894 extern rtx next_insn (rtx);
1895 extern rtx prev_nonnote_insn (rtx);
1896 extern rtx prev_nonnote_insn_bb (rtx);
1897 extern rtx next_nonnote_insn (rtx);
1898 extern rtx next_nonnote_insn_bb (rtx);
1899 extern rtx prev_nondebug_insn (rtx);
1900 extern rtx next_nondebug_insn (rtx);
1901 extern rtx prev_nonnote_nondebug_insn (rtx);
1902 extern rtx next_nonnote_nondebug_insn (rtx);
1903 extern rtx prev_real_insn (rtx);
1904 extern rtx next_real_insn (rtx);
1905 extern rtx prev_active_insn (rtx);
1906 extern rtx next_active_insn (rtx);
1907 extern int active_insn_p (const_rtx);
1908 extern rtx next_label (rtx);
1909 extern rtx skip_consecutive_labels (rtx);
1910 extern rtx next_cc0_user (rtx);
1911 extern rtx prev_cc0_setter (rtx);
1912
1913 /* In emit-rtl.c */
1914 extern int insn_line (const_rtx);
1915 extern const char * insn_file (const_rtx);
1916 extern tree insn_scope (const_rtx);
1917 extern location_t prologue_location, epilogue_location;
1918
1919 /* In jump.c */
1920 extern enum rtx_code reverse_condition (enum rtx_code);
1921 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1922 extern enum rtx_code swap_condition (enum rtx_code);
1923 extern enum rtx_code unsigned_condition (enum rtx_code);
1924 extern enum rtx_code signed_condition (enum rtx_code);
1925 extern void mark_jump_label (rtx, rtx, int);
1926 extern unsigned int cleanup_barriers (void);
1927
1928 /* In jump.c */
1929 extern rtx delete_related_insns (rtx);
1930
1931 /* In recog.c */
1932 extern rtx *find_constant_term_loc (rtx *);
1933
1934 /* In emit-rtl.c */
1935 extern rtx try_split (rtx, rtx, int);
1936 extern int split_branch_probability;
1937
1938 /* In unknown file */
1939 extern rtx split_insns (rtx, rtx);
1940
1941 /* In simplify-rtx.c */
1942 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1943 rtx, enum machine_mode);
1944 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1945 enum machine_mode);
1946 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1947 rtx, rtx);
1948 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1949 rtx);
1950 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1951 enum machine_mode, rtx, rtx, rtx);
1952 extern rtx simplify_const_relational_operation (enum rtx_code,
1953 enum machine_mode, rtx, rtx);
1954 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1955 enum machine_mode, rtx, rtx);
1956 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1957 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1958 enum machine_mode);
1959 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1960 enum machine_mode, rtx, rtx, rtx);
1961 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1962 enum machine_mode, rtx, rtx);
1963 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1964 unsigned int);
1965 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1966 unsigned int);
1967 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1968 rtx (*fn) (rtx, const_rtx, void *), void *);
1969 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1970 extern rtx simplify_rtx (const_rtx);
1971 extern rtx avoid_constant_pool_reference (rtx);
1972 extern rtx delegitimize_mem_from_attrs (rtx);
1973 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1974 extern bool val_signbit_p (enum machine_mode, unsigned HOST_WIDE_INT);
1975 extern bool val_signbit_known_set_p (enum machine_mode,
1976 unsigned HOST_WIDE_INT);
1977 extern bool val_signbit_known_clear_p (enum machine_mode,
1978 unsigned HOST_WIDE_INT);
1979
1980 /* In reginfo.c */
1981 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1982 bool);
1983
1984 /* In emit-rtl.c */
1985 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1986 extern rtx set_dst_reg_note (rtx, enum reg_note, rtx, rtx);
1987 extern void set_insn_deleted (rtx);
1988
1989 /* Functions in rtlanal.c */
1990
1991 /* Single set is implemented as macro for performance reasons. */
1992 #define single_set(I) (INSN_P (I) \
1993 ? (GET_CODE (PATTERN (I)) == SET \
1994 ? PATTERN (I) : single_set_1 (I)) \
1995 : NULL_RTX)
1996 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1997
1998 /* Structure used for passing data to REPLACE_LABEL. */
1999 typedef struct replace_label_data
2000 {
2001 rtx r1;
2002 rtx r2;
2003 bool update_label_nuses;
2004 } replace_label_data;
2005
2006 extern enum machine_mode get_address_mode (rtx mem);
2007 extern int rtx_addr_can_trap_p (const_rtx);
2008 extern bool nonzero_address_p (const_rtx);
2009 extern int rtx_unstable_p (const_rtx);
2010 extern bool rtx_varies_p (const_rtx, bool);
2011 extern bool rtx_addr_varies_p (const_rtx, bool);
2012 extern rtx get_call_rtx_from (rtx);
2013 extern HOST_WIDE_INT get_integer_term (const_rtx);
2014 extern rtx get_related_value (const_rtx);
2015 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
2016 extern void split_const (rtx, rtx *, rtx *);
2017 extern bool unsigned_reg_p (rtx);
2018 extern int reg_mentioned_p (const_rtx, const_rtx);
2019 extern int count_occurrences (const_rtx, const_rtx, int);
2020 extern int reg_referenced_p (const_rtx, const_rtx);
2021 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
2022 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
2023 extern int commutative_operand_precedence (rtx);
2024 extern bool swap_commutative_operands_p (rtx, rtx);
2025 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
2026 extern int no_labels_between_p (const_rtx, const_rtx);
2027 extern int modified_in_p (const_rtx, const_rtx);
2028 extern int reg_set_p (const_rtx, const_rtx);
2029 extern rtx single_set_2 (const_rtx, const_rtx);
2030 extern int multiple_sets (const_rtx);
2031 extern int set_noop_p (const_rtx);
2032 extern int noop_move_p (const_rtx);
2033 extern rtx find_last_value (rtx, rtx *, rtx, int);
2034 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
2035 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
2036 extern const_rtx set_of (const_rtx, const_rtx);
2037 extern void record_hard_reg_sets (rtx, const_rtx, void *);
2038 extern void record_hard_reg_uses (rtx *, void *);
2039 #ifdef HARD_CONST
2040 extern void find_all_hard_reg_sets (const_rtx, HARD_REG_SET *);
2041 #endif
2042 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
2043 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
2044 extern int dead_or_set_p (const_rtx, const_rtx);
2045 extern int dead_or_set_regno_p (const_rtx, unsigned int);
2046 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
2047 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
2048 extern rtx find_reg_equal_equiv_note (const_rtx);
2049 extern rtx find_constant_src (const_rtx);
2050 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
2051 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
2052 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
2053 extern void add_reg_note (rtx, enum reg_note, rtx);
2054 extern void remove_note (rtx, const_rtx);
2055 extern void remove_reg_equal_equiv_notes (rtx);
2056 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
2057 extern int side_effects_p (const_rtx);
2058 extern int volatile_refs_p (const_rtx);
2059 extern int volatile_insn_p (const_rtx);
2060 extern int may_trap_p_1 (const_rtx, unsigned);
2061 extern int may_trap_p (const_rtx);
2062 extern int may_trap_or_fault_p (const_rtx);
2063 extern bool can_throw_internal (const_rtx);
2064 extern bool can_throw_external (const_rtx);
2065 extern bool insn_could_throw_p (const_rtx);
2066 extern bool insn_nothrow_p (const_rtx);
2067 extern bool can_nonlocal_goto (const_rtx);
2068 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
2069 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
2070 extern int inequality_comparisons_p (const_rtx);
2071 extern rtx replace_rtx (rtx, rtx, rtx);
2072 extern int replace_label (rtx *, void *);
2073 extern int rtx_referenced_p (rtx, rtx);
2074 extern bool tablejump_p (const_rtx, rtx *, rtx *);
2075 extern int computed_jump_p (const_rtx);
2076
2077 typedef int (*rtx_function) (rtx *, void *);
2078 extern int for_each_rtx (rtx *, rtx_function, void *);
2079
2080 /* Callback for for_each_inc_dec, to process the autoinc operation OP
2081 within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is
2082 NULL. The callback is passed the same opaque ARG passed to
2083 for_each_inc_dec. Return zero to continue looking for other
2084 autoinc operations, -1 to skip OP's operands, and any other value
2085 to interrupt the traversal and return that value to the caller of
2086 for_each_inc_dec. */
2087 typedef int (*for_each_inc_dec_fn) (rtx mem, rtx op, rtx dest, rtx src,
2088 rtx srcoff, void *arg);
2089 extern int for_each_inc_dec (rtx *, for_each_inc_dec_fn, void *arg);
2090
2091 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
2092 rtx *, rtx *);
2093 extern int rtx_equal_p_cb (const_rtx, const_rtx,
2094 rtx_equal_p_callback_function);
2095
2096 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
2097 enum machine_mode *);
2098 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
2099 bool, hash_rtx_callback_function);
2100
2101 extern rtx regno_use_in (unsigned int, rtx);
2102 extern int auto_inc_p (const_rtx);
2103 extern int in_expr_list_p (const_rtx, const_rtx);
2104 extern void remove_node_from_expr_list (const_rtx, rtx *);
2105 extern int loc_mentioned_in_p (rtx *, const_rtx);
2106 extern rtx find_first_parameter_load (rtx, rtx);
2107 extern bool keep_with_call_p (const_rtx);
2108 extern bool label_is_jump_target_p (const_rtx, const_rtx);
2109 extern int insn_rtx_cost (rtx, bool);
2110
2111 /* Given an insn and condition, return a canonical description of
2112 the test being made. */
2113 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
2114
2115 /* Given a JUMP_INSN, return a canonical description of the test
2116 being made. */
2117 extern rtx get_condition (rtx, rtx *, int, int);
2118
2119 /* Information about a subreg of a hard register. */
2120 struct subreg_info
2121 {
2122 /* Offset of first hard register involved in the subreg. */
2123 int offset;
2124 /* Number of hard registers involved in the subreg. */
2125 int nregs;
2126 /* Whether this subreg can be represented as a hard reg with the new
2127 mode. */
2128 bool representable_p;
2129 };
2130
2131 extern void subreg_get_info (unsigned int, enum machine_mode,
2132 unsigned int, enum machine_mode,
2133 struct subreg_info *);
2134
2135 /* lists.c */
2136
2137 extern void free_EXPR_LIST_list (rtx *);
2138 extern void free_INSN_LIST_list (rtx *);
2139 extern void free_EXPR_LIST_node (rtx);
2140 extern void free_INSN_LIST_node (rtx);
2141 extern rtx alloc_INSN_LIST (rtx, rtx);
2142 extern rtx copy_INSN_LIST (rtx);
2143 extern rtx concat_INSN_LIST (rtx, rtx);
2144 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
2145 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
2146 extern rtx remove_list_elem (rtx, rtx *);
2147 extern rtx remove_free_INSN_LIST_node (rtx *);
2148 extern rtx remove_free_EXPR_LIST_node (rtx *);
2149
2150
2151 /* reginfo.c */
2152
2153 /* Resize reg info. */
2154 extern bool resize_reg_info (void);
2155 /* Free up register info memory. */
2156 extern void free_reg_info (void);
2157 extern void init_subregs_of_mode (void);
2158 extern void finish_subregs_of_mode (void);
2159
2160 /* recog.c */
2161 extern rtx extract_asm_operands (rtx);
2162 extern int asm_noperands (const_rtx);
2163 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
2164 enum machine_mode *, location_t *);
2165
2166 extern enum reg_class reg_preferred_class (int);
2167 extern enum reg_class reg_alternate_class (int);
2168 extern enum reg_class reg_allocno_class (int);
2169 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
2170 enum reg_class);
2171
2172 extern void split_all_insns (void);
2173 extern unsigned int split_all_insns_noflow (void);
2174
2175 #define MAX_SAVED_CONST_INT 64
2176 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
2177
2178 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
2179 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
2180 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
2181 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
2182 extern GTY(()) rtx const_true_rtx;
2183
2184 extern GTY(()) rtx const_tiny_rtx[4][(int) MAX_MACHINE_MODE];
2185
2186 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
2187 same as VOIDmode. */
2188
2189 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
2190
2191 /* Likewise, for the constants 1 and 2 and -1. */
2192
2193 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
2194 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
2195 #define CONSTM1_RTX(MODE) (const_tiny_rtx[3][(int) (MODE)])
2196
2197 extern GTY(()) rtx pc_rtx;
2198 extern GTY(()) rtx cc0_rtx;
2199 extern GTY(()) rtx ret_rtx;
2200 extern GTY(()) rtx simple_return_rtx;
2201
2202 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
2203 is used to represent the frame pointer. This is because the
2204 hard frame pointer and the automatic variables are separated by an amount
2205 that cannot be determined until after register allocation. We can assume
2206 that in this case ELIMINABLE_REGS will be defined, one action of which
2207 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
2208 #ifndef HARD_FRAME_POINTER_REGNUM
2209 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
2210 #endif
2211
2212 #ifndef HARD_FRAME_POINTER_IS_FRAME_POINTER
2213 #define HARD_FRAME_POINTER_IS_FRAME_POINTER \
2214 (HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM)
2215 #endif
2216
2217 #ifndef HARD_FRAME_POINTER_IS_ARG_POINTER
2218 #define HARD_FRAME_POINTER_IS_ARG_POINTER \
2219 (HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM)
2220 #endif
2221
2222 /* Index labels for global_rtl. */
2223 enum global_rtl_index
2224 {
2225 GR_STACK_POINTER,
2226 GR_FRAME_POINTER,
2227 /* For register elimination to work properly these hard_frame_pointer_rtx,
2228 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2229 the same register. */
2230 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2231 GR_ARG_POINTER = GR_FRAME_POINTER,
2232 #endif
2233 #if HARD_FRAME_POINTER_IS_FRAME_POINTER
2234 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2235 #else
2236 GR_HARD_FRAME_POINTER,
2237 #endif
2238 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2239 #if HARD_FRAME_POINTER_IS_ARG_POINTER
2240 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2241 #else
2242 GR_ARG_POINTER,
2243 #endif
2244 #endif
2245 GR_VIRTUAL_INCOMING_ARGS,
2246 GR_VIRTUAL_STACK_ARGS,
2247 GR_VIRTUAL_STACK_DYNAMIC,
2248 GR_VIRTUAL_OUTGOING_ARGS,
2249 GR_VIRTUAL_CFA,
2250 GR_VIRTUAL_PREFERRED_STACK_BOUNDARY,
2251
2252 GR_MAX
2253 };
2254
2255 /* Target-dependent globals. */
2256 struct GTY(()) target_rtl {
2257 /* All references to the hard registers in global_rtl_index go through
2258 these unique rtl objects. On machines where the frame-pointer and
2259 arg-pointer are the same register, they use the same unique object.
2260
2261 After register allocation, other rtl objects which used to be pseudo-regs
2262 may be clobbered to refer to the frame-pointer register.
2263 But references that were originally to the frame-pointer can be
2264 distinguished from the others because they contain frame_pointer_rtx.
2265
2266 When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
2267 tricky: until register elimination has taken place hard_frame_pointer_rtx
2268 should be used if it is being set, and frame_pointer_rtx otherwise. After
2269 register elimination hard_frame_pointer_rtx should always be used.
2270 On machines where the two registers are same (most) then these are the
2271 same. */
2272 rtx x_global_rtl[GR_MAX];
2273
2274 /* A unique representation of (REG:Pmode PIC_OFFSET_TABLE_REGNUM). */
2275 rtx x_pic_offset_table_rtx;
2276
2277 /* A unique representation of (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM).
2278 This is used to implement __builtin_return_address for some machines;
2279 see for instance the MIPS port. */
2280 rtx x_return_address_pointer_rtx;
2281
2282 /* Commonly used RTL for hard registers. These objects are not
2283 necessarily unique, so we allocate them separately from global_rtl.
2284 They are initialized once per compilation unit, then copied into
2285 regno_reg_rtx at the beginning of each function. */
2286 rtx x_initial_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
2287
2288 /* A sample (mem:M stack_pointer_rtx) rtx for each mode M. */
2289 rtx x_top_of_stack[MAX_MACHINE_MODE];
2290
2291 /* Static hunks of RTL used by the aliasing code; these are treated
2292 as persistent to avoid unnecessary RTL allocations. */
2293 rtx x_static_reg_base_value[FIRST_PSEUDO_REGISTER];
2294
2295 /* The default memory attributes for each mode. */
2296 struct mem_attrs *x_mode_mem_attrs[(int) MAX_MACHINE_MODE];
2297 };
2298
2299 extern GTY(()) struct target_rtl default_target_rtl;
2300 #if SWITCHABLE_TARGET
2301 extern struct target_rtl *this_target_rtl;
2302 #else
2303 #define this_target_rtl (&default_target_rtl)
2304 #endif
2305
2306 #define global_rtl \
2307 (this_target_rtl->x_global_rtl)
2308 #define pic_offset_table_rtx \
2309 (this_target_rtl->x_pic_offset_table_rtx)
2310 #define return_address_pointer_rtx \
2311 (this_target_rtl->x_return_address_pointer_rtx)
2312 #define top_of_stack \
2313 (this_target_rtl->x_top_of_stack)
2314 #define mode_mem_attrs \
2315 (this_target_rtl->x_mode_mem_attrs)
2316
2317 /* All references to certain hard regs, except those created
2318 by allocating pseudo regs into them (when that's possible),
2319 go through these unique rtx objects. */
2320 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2321 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2322 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2323 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2324
2325 #ifndef GENERATOR_FILE
2326 /* Return the attributes of a MEM rtx. */
2327 static inline struct mem_attrs *
2328 get_mem_attrs (const_rtx x)
2329 {
2330 struct mem_attrs *attrs;
2331
2332 attrs = MEM_ATTRS (x);
2333 if (!attrs)
2334 attrs = mode_mem_attrs[(int) GET_MODE (x)];
2335 return attrs;
2336 }
2337 #endif
2338
2339 /* Include the RTL generation functions. */
2340
2341 #ifndef GENERATOR_FILE
2342 #include "genrtl.h"
2343 #undef gen_rtx_ASM_INPUT
2344 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2345 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2346 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2347 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2348 #endif
2349
2350 /* There are some RTL codes that require special attention; the
2351 generation functions included above do the raw handling. If you
2352 add to this list, modify special_rtx in gengenrtl.c as well. */
2353
2354 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2355 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2356 extern rtx gen_raw_REG (enum machine_mode, int);
2357 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2358 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2359 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2360
2361 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2362
2363 /* Virtual registers are used during RTL generation to refer to locations into
2364 the stack frame when the actual location isn't known until RTL generation
2365 is complete. The routine instantiate_virtual_regs replaces these with
2366 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2367 a constant. */
2368
2369 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2370
2371 /* This points to the first word of the incoming arguments passed on the stack,
2372 either by the caller or by the callee when pretending it was passed by the
2373 caller. */
2374
2375 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2376
2377 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2378
2379 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2380 variable on the stack. Otherwise, it points to the first variable on
2381 the stack. */
2382
2383 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2384
2385 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2386
2387 /* This points to the location of dynamically-allocated memory on the stack
2388 immediately after the stack pointer has been adjusted by the amount
2389 desired. */
2390
2391 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2392
2393 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2394
2395 /* This points to the location in the stack at which outgoing arguments should
2396 be written when the stack is pre-pushed (arguments pushed using push
2397 insns always use sp). */
2398
2399 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2400
2401 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2402
2403 /* This points to the Canonical Frame Address of the function. This
2404 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2405 but is calculated relative to the arg pointer for simplicity; the
2406 frame pointer nor stack pointer are necessarily fixed relative to
2407 the CFA until after reload. */
2408
2409 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2410
2411 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2412
2413 #define LAST_VIRTUAL_POINTER_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2414
2415 /* This is replaced by crtl->preferred_stack_boundary / BITS_PER_UNIT
2416 when finalized. */
2417
2418 #define virtual_preferred_stack_boundary_rtx \
2419 (global_rtl[GR_VIRTUAL_PREFERRED_STACK_BOUNDARY])
2420
2421 #define VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM \
2422 ((FIRST_VIRTUAL_REGISTER) + 5)
2423
2424 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 5)
2425
2426 /* Nonzero if REGNUM is a pointer into the stack frame. */
2427 #define REGNO_PTR_FRAME_P(REGNUM) \
2428 ((REGNUM) == STACK_POINTER_REGNUM \
2429 || (REGNUM) == FRAME_POINTER_REGNUM \
2430 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2431 || (REGNUM) == ARG_POINTER_REGNUM \
2432 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2433 && (REGNUM) <= LAST_VIRTUAL_POINTER_REGISTER))
2434
2435 /* REGNUM never really appearing in the INSN stream. */
2436 #define INVALID_REGNUM (~(unsigned int) 0)
2437
2438 extern rtx output_constant_def (tree, int);
2439 extern rtx lookup_constant_def (tree);
2440
2441 /* Nonzero after end of reload pass.
2442 Set to 1 or 0 by reload1.c. */
2443
2444 extern int reload_completed;
2445
2446 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2447 extern int epilogue_completed;
2448
2449 /* Set to 1 while reload_as_needed is operating.
2450 Required by some machines to handle any generated moves differently. */
2451
2452 extern int reload_in_progress;
2453
2454 /* Set to 1 while in lra. */
2455 extern int lra_in_progress;
2456
2457 /* This macro indicates whether you may create a new
2458 pseudo-register. */
2459
2460 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2461
2462 #ifdef STACK_REGS
2463 /* Nonzero after end of regstack pass.
2464 Set to 1 or 0 by reg-stack.c. */
2465 extern int regstack_completed;
2466 #endif
2467
2468 /* If this is nonzero, we do not bother generating VOLATILE
2469 around volatile memory references, and we are willing to
2470 output indirect addresses. If cse is to follow, we reject
2471 indirect addresses so a useful potential cse is generated;
2472 if it is used only once, instruction combination will produce
2473 the same indirect address eventually. */
2474 extern int cse_not_expected;
2475
2476 /* Translates rtx code to tree code, for those codes needed by
2477 REAL_ARITHMETIC. The function returns an int because the caller may not
2478 know what `enum tree_code' means. */
2479
2480 extern int rtx_to_tree_code (enum rtx_code);
2481
2482 /* In cse.c */
2483 extern int delete_trivially_dead_insns (rtx, int);
2484 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2485 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2486
2487 /* In dse.c */
2488 extern bool check_for_inc_dec (rtx insn);
2489
2490 /* In jump.c */
2491 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2492 extern bool jump_to_label_p (rtx);
2493 extern int condjump_p (const_rtx);
2494 extern int any_condjump_p (const_rtx);
2495 extern int any_uncondjump_p (const_rtx);
2496 extern rtx pc_set (const_rtx);
2497 extern rtx condjump_label (const_rtx);
2498 extern int simplejump_p (const_rtx);
2499 extern int returnjump_p (rtx);
2500 extern int eh_returnjump_p (rtx);
2501 extern int onlyjump_p (const_rtx);
2502 extern int only_sets_cc0_p (const_rtx);
2503 extern int sets_cc0_p (const_rtx);
2504 extern int invert_jump_1 (rtx, rtx);
2505 extern int invert_jump (rtx, rtx, int);
2506 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2507 extern int true_regnum (const_rtx);
2508 extern unsigned int reg_or_subregno (const_rtx);
2509 extern int redirect_jump_1 (rtx, rtx);
2510 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2511 extern int redirect_jump (rtx, rtx, int);
2512 extern void rebuild_jump_labels (rtx);
2513 extern void rebuild_jump_labels_chain (rtx);
2514 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2515 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2516 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2517 const_rtx, const_rtx);
2518 extern void delete_for_peephole (rtx, rtx);
2519 extern int condjump_in_parallel_p (const_rtx);
2520
2521 /* In emit-rtl.c. */
2522 extern int max_reg_num (void);
2523 extern int max_label_num (void);
2524 extern int get_first_label_num (void);
2525 extern void maybe_set_first_label_num (rtx);
2526 extern void delete_insns_since (rtx);
2527 extern void mark_reg_pointer (rtx, int);
2528 extern void mark_user_reg (rtx);
2529 extern void reset_used_flags (rtx);
2530 extern void set_used_flags (rtx);
2531 extern void reorder_insns (rtx, rtx, rtx);
2532 extern void reorder_insns_nobb (rtx, rtx, rtx);
2533 extern int get_max_insn_count (void);
2534 extern int in_sequence_p (void);
2535 extern void init_emit (void);
2536 extern void init_emit_regs (void);
2537 extern void init_emit_once (void);
2538 extern void push_topmost_sequence (void);
2539 extern void pop_topmost_sequence (void);
2540 extern void set_new_first_and_last_insn (rtx, rtx);
2541 extern unsigned int unshare_all_rtl (void);
2542 extern void unshare_all_rtl_again (rtx);
2543 extern void unshare_all_rtl_in_chain (rtx);
2544 extern void verify_rtl_sharing (void);
2545 extern void link_cc0_insns (rtx);
2546 extern void add_insn (rtx);
2547 extern void add_insn_before (rtx, rtx, basic_block);
2548 extern void add_insn_after (rtx, rtx, basic_block);
2549 extern void remove_insn (rtx);
2550 extern rtx emit (rtx);
2551 extern void delete_insn (rtx);
2552 extern rtx entry_of_function (void);
2553 extern void emit_insn_at_entry (rtx);
2554 extern void delete_insn_chain (rtx, rtx, bool);
2555 extern rtx unlink_insn_chain (rtx, rtx);
2556 extern void delete_insn_and_edges (rtx);
2557 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2558 extern rtx gen_const_mem (enum machine_mode, rtx);
2559 extern rtx gen_frame_mem (enum machine_mode, rtx);
2560 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2561 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2562 const_rtx, unsigned int);
2563
2564 /* In combine.c */
2565 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2566 extern rtx remove_death (unsigned int, rtx);
2567 extern void dump_combine_stats (FILE *);
2568 extern void dump_combine_total_stats (FILE *);
2569 extern rtx make_compound_operation (rtx, enum rtx_code);
2570
2571 /* In cfgcleanup.c */
2572 extern void delete_dead_jumptables (void);
2573
2574 /* In sched-vis.c. */
2575 extern void debug_bb_n_slim (int);
2576 extern void debug_bb_slim (struct basic_block_def *);
2577 extern void print_value_slim (FILE *, const_rtx, int);
2578 extern void debug_rtl_slim (FILE *, const_rtx, const_rtx, int, int);
2579 extern void dump_insn_slim (FILE *f, const_rtx x);
2580 extern void debug_insn_slim (const_rtx x);
2581
2582 /* In sched-rgn.c. */
2583 extern void schedule_insns (void);
2584
2585 /* In sched-ebb.c. */
2586 extern void schedule_ebbs (void);
2587
2588 /* In sel-sched-dump.c. */
2589 extern void sel_sched_fix_param (const char *param, const char *val);
2590
2591 /* In print-rtl.c */
2592 extern const char *print_rtx_head;
2593 extern void debug_rtx (const_rtx);
2594 extern void debug_rtx_list (const_rtx, int);
2595 extern void debug_rtx_range (const_rtx, const_rtx);
2596 extern const_rtx debug_rtx_find (const_rtx, int);
2597 extern void print_mem_expr (FILE *, const_tree);
2598 extern void print_rtl (FILE *, const_rtx);
2599 extern void print_simple_rtl (FILE *, const_rtx);
2600 extern int print_rtl_single (FILE *, const_rtx);
2601 extern int print_rtl_single_with_indent (FILE *, const_rtx, int);
2602 extern void print_inline_rtx (FILE *, const_rtx, int);
2603
2604 /* In function.c */
2605 extern void reposition_prologue_and_epilogue_notes (void);
2606 extern int prologue_epilogue_contains (const_rtx);
2607 extern int sibcall_epilogue_contains (const_rtx);
2608 extern void update_temp_slot_address (rtx, rtx);
2609 extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
2610 extern void set_return_jump_label (rtx);
2611
2612 /* In stmt.c */
2613 extern void expand_null_return (void);
2614 extern void expand_naked_return (void);
2615 extern void emit_jump (rtx);
2616
2617 /* In expr.c */
2618 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2619 unsigned int, int);
2620 extern HOST_WIDE_INT find_args_size_adjust (rtx);
2621 extern int fixup_args_size_notes (rtx, rtx, int);
2622
2623 /* In cfgrtl.c */
2624 extern void print_rtl_with_bb (FILE *, const_rtx, int);
2625 extern rtx duplicate_insn_chain (rtx, rtx);
2626
2627 /* In expmed.c */
2628 extern void init_expmed (void);
2629 extern void expand_inc (rtx, rtx);
2630 extern void expand_dec (rtx, rtx);
2631
2632 /* In lower-subreg.c */
2633 extern void init_lower_subreg (void);
2634
2635 /* In gcse.c */
2636 extern bool can_copy_p (enum machine_mode);
2637 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2638 extern rtx fis_get_condition (rtx);
2639
2640 /* In ira.c */
2641 #ifdef HARD_CONST
2642 extern HARD_REG_SET eliminable_regset;
2643 #endif
2644 extern void mark_elimination (int, int);
2645
2646 /* In reginfo.c */
2647 extern int reg_classes_intersect_p (reg_class_t, reg_class_t);
2648 extern int reg_class_subset_p (reg_class_t, reg_class_t);
2649 extern void globalize_reg (tree, int);
2650 extern void init_reg_modes_target (void);
2651 extern void init_regs (void);
2652 extern void reinit_regs (void);
2653 extern void init_fake_stack_mems (void);
2654 extern void save_register_info (void);
2655 extern void init_reg_sets (void);
2656 extern void regclass (rtx, int);
2657 extern void reg_scan (rtx, unsigned int);
2658 extern void fix_register (const char *, int, int);
2659 extern bool invalid_mode_change_p (unsigned int, enum reg_class);
2660
2661 /* In reorg.c */
2662 extern void dbr_schedule (rtx);
2663
2664 /* In reload1.c */
2665 extern int function_invariant_p (const_rtx);
2666
2667 /* In calls.c */
2668 enum libcall_type
2669 {
2670 LCT_NORMAL = 0,
2671 LCT_CONST = 1,
2672 LCT_PURE = 2,
2673 LCT_NORETURN = 3,
2674 LCT_THROW = 4,
2675 LCT_RETURNS_TWICE = 5
2676 };
2677
2678 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2679 ...);
2680 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2681 enum machine_mode, int, ...);
2682
2683 /* In varasm.c */
2684 extern void init_varasm_once (void);
2685
2686 extern rtx make_debug_expr_from_rtl (const_rtx);
2687
2688 /* In read-rtl.c */
2689 extern bool read_rtx (const char *, rtx *);
2690
2691 /* In alias.c */
2692 extern rtx canon_rtx (rtx);
2693 extern int true_dependence (const_rtx, enum machine_mode, const_rtx);
2694 extern rtx get_addr (rtx);
2695 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx,
2696 const_rtx, rtx);
2697 extern int read_dependence (const_rtx, const_rtx);
2698 extern int anti_dependence (const_rtx, const_rtx);
2699 extern int output_dependence (const_rtx, const_rtx);
2700 extern int may_alias_p (const_rtx, const_rtx);
2701 extern void init_alias_target (void);
2702 extern void init_alias_analysis (void);
2703 extern void end_alias_analysis (void);
2704 extern void vt_equate_reg_base_value (const_rtx, const_rtx);
2705 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2706 extern bool memory_must_be_modified_in_insn_p (const_rtx, const_rtx);
2707 extern bool may_be_sp_based_p (rtx);
2708 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2709 extern rtx get_reg_known_value (unsigned int);
2710 extern bool get_reg_known_equiv_p (unsigned int);
2711 extern rtx get_reg_base_value (unsigned int);
2712
2713 #ifdef STACK_REGS
2714 extern int stack_regs_mentioned (const_rtx insn);
2715 #endif
2716
2717 /* In toplev.c */
2718 extern GTY(()) rtx stack_limit_rtx;
2719
2720 /* In predict.c */
2721 extern void invert_br_probabilities (rtx);
2722 extern bool expensive_function_p (int);
2723
2724 /* In var-tracking.c */
2725 extern unsigned int variable_tracking_main (void);
2726
2727 /* In stor-layout.c. */
2728 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2729 rtx *, rtx *);
2730
2731 /* In loop-unswitch.c */
2732 extern rtx reversed_condition (rtx);
2733 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2734
2735 /* In loop-iv.c */
2736 extern rtx canon_condition (rtx);
2737 extern void simplify_using_condition (rtx, rtx *, bitmap);
2738
2739 /* In final.c */
2740 extern unsigned int compute_alignments (void);
2741 extern int asm_str_count (const char *templ);
2742 \f
2743 struct rtl_hooks
2744 {
2745 rtx (*gen_lowpart) (enum machine_mode, rtx);
2746 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2747 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2748 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2749 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2750 unsigned int, unsigned int *);
2751 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2752
2753 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2754 };
2755
2756 /* Each pass can provide its own. */
2757 extern struct rtl_hooks rtl_hooks;
2758
2759 /* ... but then it has to restore these. */
2760 extern const struct rtl_hooks general_rtl_hooks;
2761
2762 /* Keep this for the nonce. */
2763 #define gen_lowpart rtl_hooks.gen_lowpart
2764
2765 extern void insn_locations_init (void);
2766 extern void insn_locations_finalize (void);
2767 extern void set_curr_insn_location (location_t);
2768 extern location_t curr_insn_location (void);
2769 extern bool optimize_insn_for_size_p (void);
2770 extern bool optimize_insn_for_speed_p (void);
2771
2772 /* rtl-error.c */
2773 extern void _fatal_insn_not_found (const_rtx, const char *, int, const char *)
2774 ATTRIBUTE_NORETURN;
2775 extern void _fatal_insn (const char *, const_rtx, const char *, int, const char *)
2776 ATTRIBUTE_NORETURN;
2777
2778 #define fatal_insn(msgid, insn) \
2779 _fatal_insn (msgid, insn, __FILE__, __LINE__, __FUNCTION__)
2780 #define fatal_insn_not_found(insn) \
2781 _fatal_insn_not_found (insn, __FILE__, __LINE__, __FUNCTION__)
2782
2783
2784
2785 #endif /* ! GCC_RTL_H */
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