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Fix EH handling issue in last change:
[official-gcc.git] / gcc / rtl.h
blob0d0a2a347ebe7110d7f951a3e786bae6d10954ef
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987-2013 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #ifndef GCC_RTL_H
21 #define GCC_RTL_H
22
23 #include "statistics.h"
24 #include "machmode.h"
25 #include "input.h"
26 #include "real.h"
27 #include "vec.h"
28 #include "fixed-value.h"
29 #include "alias.h"
30 #include "hashtab.h"
31 #include "flags.h"
32
33 /* Value used by some passes to "recognize" noop moves as valid
34 instructions. */
35 #define NOOP_MOVE_INSN_CODE INT_MAX
36
37 /* Register Transfer Language EXPRESSIONS CODES */
38
39 #define RTX_CODE enum rtx_code
40 enum rtx_code {
41
42 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
43 #include "rtl.def" /* rtl expressions are documented here */
44 #undef DEF_RTL_EXPR
45
46 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
47 NUM_RTX_CODE.
48 Assumes default enum value assignment. */
49
50 /* The cast here, saves many elsewhere. */
51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
52
53 /* Similar, but since generator files get more entries... */
54 #ifdef GENERATOR_FILE
55 # define NON_GENERATOR_NUM_RTX_CODE ((int) MATCH_OPERAND)
56 #endif
57
58 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
59
60 enum rtx_class {
61 /* We check bit 0-1 of some rtx class codes in the predicates below. */
62
63 /* Bit 0 = comparison if 0, arithmetic is 1
64 Bit 1 = 1 if commutative. */
65 RTX_COMPARE, /* 0 */
66 RTX_COMM_COMPARE,
67 RTX_BIN_ARITH,
68 RTX_COMM_ARITH,
69
70 /* Must follow the four preceding values. */
71 RTX_UNARY, /* 4 */
72
73 RTX_EXTRA,
74 RTX_MATCH,
75 RTX_INSN,
76
77 /* Bit 0 = 1 if constant. */
78 RTX_OBJ, /* 8 */
79 RTX_CONST_OBJ,
80
81 RTX_TERNARY,
82 RTX_BITFIELD_OPS,
83 RTX_AUTOINC
84 };
85
86 #define RTX_OBJ_MASK (~1)
87 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
88 #define RTX_COMPARE_MASK (~1)
89 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
90 #define RTX_ARITHMETIC_MASK (~1)
91 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
92 #define RTX_BINARY_MASK (~3)
93 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
94 #define RTX_COMMUTATIVE_MASK (~2)
95 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
96 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
97
98 extern const unsigned char rtx_length[NUM_RTX_CODE];
99 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
100
101 extern const char * const rtx_name[NUM_RTX_CODE];
102 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
103
104 extern const char * const rtx_format[NUM_RTX_CODE];
105 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
106
107 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
108 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
109
110 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
111 extern const unsigned char rtx_next[NUM_RTX_CODE];
112 \f
113 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
114 relative to which the offsets are calculated, as explained in rtl.def. */
115 typedef struct
116 {
117 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
118 unsigned min_align: 8;
119 /* Flags: */
120 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
121 unsigned min_after_vec: 1; /* minimum address target label is
122 after the ADDR_DIFF_VEC. */
123 unsigned max_after_vec: 1; /* maximum address target label is
124 after the ADDR_DIFF_VEC. */
125 unsigned min_after_base: 1; /* minimum address target label is
126 after BASE. */
127 unsigned max_after_base: 1; /* maximum address target label is
128 after BASE. */
129 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
130 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
131 unsigned : 2;
132 unsigned scale : 8;
133 } addr_diff_vec_flags;
134
135 /* Structure used to describe the attributes of a MEM. These are hashed
136 so MEMs that the same attributes share a data structure. This means
137 they cannot be modified in place. */
138 typedef struct GTY(()) mem_attrs
139 {
140 /* The expression that the MEM accesses, or null if not known.
141 This expression might be larger than the memory reference itself.
142 (In other words, the MEM might access only part of the object.) */
143 tree expr;
144
145 /* The offset of the memory reference from the start of EXPR.
146 Only valid if OFFSET_KNOWN_P. */
147 HOST_WIDE_INT offset;
148
149 /* The size of the memory reference in bytes. Only valid if
150 SIZE_KNOWN_P. */
151 HOST_WIDE_INT size;
152
153 /* The alias set of the memory reference. */
154 alias_set_type alias;
155
156 /* The alignment of the reference in bits. Always a multiple of
157 BITS_PER_UNIT. Note that EXPR may have a stricter alignment
158 than the memory reference itself. */
159 unsigned int align;
160
161 /* The address space that the memory reference uses. */
162 unsigned char addrspace;
163
164 /* True if OFFSET is known. */
165 bool offset_known_p;
166
167 /* True if SIZE is known. */
168 bool size_known_p;
169 } mem_attrs;
170
171 /* Structure used to describe the attributes of a REG in similar way as
172 mem_attrs does for MEM above. Note that the OFFSET field is calculated
173 in the same way as for mem_attrs, rather than in the same way as a
174 SUBREG_BYTE. For example, if a big-endian target stores a byte
175 object in the low part of a 4-byte register, the OFFSET field
176 will be -3 rather than 0. */
177
178 typedef struct GTY(()) reg_attrs {
179 tree decl; /* decl corresponding to REG. */
180 HOST_WIDE_INT offset; /* Offset from start of DECL. */
181 } reg_attrs;
182
183 /* Common union for an element of an rtx. */
184
185 union rtunion_def
186 {
187 int rt_int;
188 unsigned int rt_uint;
189 const char *rt_str;
190 rtx rt_rtx;
191 rtvec rt_rtvec;
192 enum machine_mode rt_type;
193 addr_diff_vec_flags rt_addr_diff_vec_flags;
194 struct cselib_val_struct *rt_cselib;
195 tree rt_tree;
196 basic_block rt_bb;
197 mem_attrs *rt_mem;
198 reg_attrs *rt_reg;
199 struct constant_descriptor_rtx *rt_constant;
200 struct dw_cfi_struct *rt_cfi;
201 };
202 typedef union rtunion_def rtunion;
203
204 /* This structure remembers the position of a SYMBOL_REF within an
205 object_block structure. A SYMBOL_REF only provides this information
206 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
207 struct GTY(()) block_symbol {
208 /* The usual SYMBOL_REF fields. */
209 rtunion GTY ((skip)) fld[3];
210
211 /* The block that contains this object. */
212 struct object_block *block;
213
214 /* The offset of this object from the start of its block. It is negative
215 if the symbol has not yet been assigned an offset. */
216 HOST_WIDE_INT offset;
217 };
218
219 /* Describes a group of objects that are to be placed together in such
220 a way that their relative positions are known. */
221 struct GTY(()) object_block {
222 /* The section in which these objects should be placed. */
223 section *sect;
224
225 /* The alignment of the first object, measured in bits. */
226 unsigned int alignment;
227
228 /* The total size of the objects, measured in bytes. */
229 HOST_WIDE_INT size;
230
231 /* The SYMBOL_REFs for each object. The vector is sorted in
232 order of increasing offset and the following conditions will
233 hold for each element X:
234
235 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
236 !SYMBOL_REF_ANCHOR_P (X)
237 SYMBOL_REF_BLOCK (X) == [address of this structure]
238 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
239 vec<rtx, va_gc> *objects;
240
241 /* All the anchor SYMBOL_REFs used to address these objects, sorted
242 in order of increasing offset, and then increasing TLS model.
243 The following conditions will hold for each element X in this vector:
244
245 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
246 SYMBOL_REF_ANCHOR_P (X)
247 SYMBOL_REF_BLOCK (X) == [address of this structure]
248 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
249 vec<rtx, va_gc> *anchors;
250 };
251
252 /* RTL expression ("rtx"). */
253
254 struct GTY((chain_next ("RTX_NEXT (&%h)"),
255 chain_prev ("RTX_PREV (&%h)"), variable_size)) rtx_def {
256 /* The kind of expression this is. */
257 ENUM_BITFIELD(rtx_code) code: 16;
258
259 /* The kind of value the expression has. */
260 ENUM_BITFIELD(machine_mode) mode : 8;
261
262 /* 1 in a MEM if we should keep the alias set for this mem unchanged
263 when we access a component.
264 1 in a CALL_INSN if it is a sibling call.
265 1 in a SET that is for a return.
266 In a CODE_LABEL, part of the two-bit alternate entry field.
267 1 in a CONCAT is VAL_EXPR_IS_COPIED in var-tracking.c.
268 1 in a VALUE is SP_BASED_VALUE_P in cselib.c.
269 1 in a SUBREG generated by LRA for reload insns. */
270 unsigned int jump : 1;
271 /* In a CODE_LABEL, part of the two-bit alternate entry field.
272 1 in a MEM if it cannot trap.
273 1 in a CALL_INSN logically equivalent to
274 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
275 unsigned int call : 1;
276 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
277 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
278 1 in a SYMBOL_REF if it addresses something in the per-function
279 constants pool.
280 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
281 1 in a NOTE, or EXPR_LIST for a const call.
282 1 in a JUMP_INSN of an annulling branch.
283 1 in a CONCAT is VAL_EXPR_IS_CLOBBERED in var-tracking.c.
284 1 in a preserved VALUE is PRESERVED_VALUE_P in cselib.c.
285 1 in a clobber temporarily created for LRA. */
286 unsigned int unchanging : 1;
287 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
288 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
289 if it has been deleted.
290 1 in a REG expression if corresponds to a variable declared by the user,
291 0 for an internally generated temporary.
292 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
293 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
294 non-local label.
295 In a SYMBOL_REF, this flag is used for machine-specific purposes.
296 In a PREFETCH, this flag indicates that it should be considered a scheduling
297 barrier.
298 1 in a CONCAT is VAL_NEEDS_RESOLUTION in var-tracking.c. */
299 unsigned int volatil : 1;
300 /* 1 in a REG if the register is used only in exit code a loop.
301 1 in a SUBREG expression if was generated from a variable with a
302 promoted mode.
303 1 in a CODE_LABEL if the label is used for nonlocal gotos
304 and must not be deleted even if its count is zero.
305 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
306 together with the preceding insn. Valid only within sched.
307 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
308 from the target of a branch. Valid from reorg until end of compilation;
309 cleared before used.
310
311 The name of the field is historical. It used to be used in MEMs
312 to record whether the MEM accessed part of a structure. */
313 unsigned int in_struct : 1;
314 /* At the end of RTL generation, 1 if this rtx is used. This is used for
315 copying shared structure. See `unshare_all_rtl'.
316 In a REG, this is not needed for that purpose, and used instead
317 in `leaf_renumber_regs_insn'.
318 1 in a SYMBOL_REF, means that emit_library_call
319 has used it as the function.
320 1 in a CONCAT is VAL_HOLDS_TRACK_EXPR in var-tracking.c.
321 1 in a VALUE or DEBUG_EXPR is VALUE_RECURSED_INTO in var-tracking.c. */
322 unsigned int used : 1;
323 /* 1 in an INSN or a SET if this rtx is related to the call frame,
324 either changing how we compute the frame address or saving and
325 restoring registers in the prologue and epilogue.
326 1 in a REG or MEM if it is a pointer.
327 1 in a SYMBOL_REF if it addresses something in the per-function
328 constant string pool.
329 1 in a VALUE is VALUE_CHANGED in var-tracking.c. */
330 unsigned frame_related : 1;
331 /* 1 in a REG or PARALLEL that is the current function's return value.
332 1 in a SYMBOL_REF for a weak symbol.
333 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P.
334 1 in a CONCAT is VAL_EXPR_HAS_REVERSE in var-tracking.c.
335 1 in a VALUE or DEBUG_EXPR is NO_LOC_P in var-tracking.c. */
336 unsigned return_val : 1;
337
338 /* The first element of the operands of this rtx.
339 The number of operands and their types are controlled
340 by the `code' field, according to rtl.def. */
341 union u {
342 rtunion fld[1];
343 HOST_WIDE_INT hwint[1];
344 struct block_symbol block_sym;
345 struct real_value rv;
346 struct fixed_value fv;
347 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
348 };
349
350 /* The size in bytes of an rtx header (code, mode and flags). */
351 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
352
353 /* The size in bytes of an rtx with code CODE. */
354 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
355
356 #define NULL_RTX (rtx) 0
357
358 /* The "next" and "previous" RTX, relative to this one. */
359
360 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
361 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
362
363 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
364 */
365 #define RTX_PREV(X) ((INSN_P (X) \
366 || NOTE_P (X) \
367 || JUMP_TABLE_DATA_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 integer const. */
435 #define CONST_SCALAR_INT_P(X) \
436 (CONST_INT_P (X) || CONST_DOUBLE_AS_INT_P (X))
437
438 /* Predicate yielding true iff X is an rtx for a double-int. */
439 #define CONST_DOUBLE_AS_FLOAT_P(X) \
440 (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != VOIDmode)
441
442 /* Predicate yielding nonzero iff X is a label insn. */
443 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
444
445 /* Predicate yielding nonzero iff X is a jump insn. */
446 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
447
448 /* Predicate yielding nonzero iff X is a call insn. */
449 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
450
451 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
452 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
453
454 /* Predicate yielding nonzero iff X is a debug note/insn. */
455 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
456
457 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
458 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
459
460 /* Nonzero if DEBUG_INSN_P may possibly hold. */
461 #define MAY_HAVE_DEBUG_INSNS (flag_var_tracking_assignments)
462
463 /* Predicate yielding nonzero iff X is a real insn. */
464 #define INSN_P(X) \
465 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
466
467 /* Predicate yielding nonzero iff X is a note insn. */
468 #define NOTE_P(X) (GET_CODE (X) == NOTE)
469
470 /* Predicate yielding nonzero iff X is a barrier insn. */
471 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
472
473 /* Predicate yielding nonzero iff X is a data for a jump table. */
474 #define JUMP_TABLE_DATA_P(INSN) (GET_CODE (INSN) == JUMP_TABLE_DATA)
475
476 /* Predicate yielding nonzero iff X is a return or simple_return. */
477 #define ANY_RETURN_P(X) \
478 (GET_CODE (X) == RETURN || GET_CODE (X) == SIMPLE_RETURN)
479
480 /* 1 if X is a unary operator. */
481
482 #define UNARY_P(X) \
483 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
484
485 /* 1 if X is a binary operator. */
486
487 #define BINARY_P(X) \
488 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
489
490 /* 1 if X is an arithmetic operator. */
491
492 #define ARITHMETIC_P(X) \
493 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
494 == RTX_ARITHMETIC_RESULT)
495
496 /* 1 if X is an arithmetic operator. */
497
498 #define COMMUTATIVE_ARITH_P(X) \
499 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
500
501 /* 1 if X is a commutative arithmetic operator or a comparison operator.
502 These two are sometimes selected together because it is possible to
503 swap the two operands. */
504
505 #define SWAPPABLE_OPERANDS_P(X) \
506 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
507 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
508 | (1 << RTX_COMPARE)))
509
510 /* 1 if X is a non-commutative operator. */
511
512 #define NON_COMMUTATIVE_P(X) \
513 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
514 == RTX_NON_COMMUTATIVE_RESULT)
515
516 /* 1 if X is a commutative operator on integers. */
517
518 #define COMMUTATIVE_P(X) \
519 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
520 == RTX_COMMUTATIVE_RESULT)
521
522 /* 1 if X is a relational operator. */
523
524 #define COMPARISON_P(X) \
525 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
526
527 /* 1 if X is a constant value that is an integer. */
528
529 #define CONSTANT_P(X) \
530 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
531
532 /* 1 if X can be used to represent an object. */
533 #define OBJECT_P(X) \
534 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
535
536 /* General accessor macros for accessing the fields of an rtx. */
537
538 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
539 /* The bit with a star outside the statement expr and an & inside is
540 so that N can be evaluated only once. */
541 #define RTL_CHECK1(RTX, N, C1) __extension__ \
542 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
543 const enum rtx_code _code = GET_CODE (_rtx); \
544 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
545 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
546 __FUNCTION__); \
547 if (GET_RTX_FORMAT(_code)[_n] != C1) \
548 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
549 __FUNCTION__); \
550 &_rtx->u.fld[_n]; }))
551
552 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
553 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
554 const enum rtx_code _code = GET_CODE (_rtx); \
555 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
556 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
557 __FUNCTION__); \
558 if (GET_RTX_FORMAT(_code)[_n] != C1 \
559 && GET_RTX_FORMAT(_code)[_n] != C2) \
560 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
561 __FUNCTION__); \
562 &_rtx->u.fld[_n]; }))
563
564 #define RTL_CHECKC1(RTX, N, C) __extension__ \
565 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
566 if (GET_CODE (_rtx) != (C)) \
567 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
568 __FUNCTION__); \
569 &_rtx->u.fld[_n]; }))
570
571 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
572 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
573 const enum rtx_code _code = GET_CODE (_rtx); \
574 if (_code != (C1) && _code != (C2)) \
575 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
576 __FUNCTION__); \
577 &_rtx->u.fld[_n]; }))
578
579 #define RTVEC_ELT(RTVEC, I) __extension__ \
580 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
581 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
582 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
583 __FUNCTION__); \
584 &_rtvec->elem[_i]; }))
585
586 #define XWINT(RTX, N) __extension__ \
587 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
588 const enum rtx_code _code = GET_CODE (_rtx); \
589 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
590 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
591 __FUNCTION__); \
592 if (GET_RTX_FORMAT(_code)[_n] != 'w') \
593 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
594 __FUNCTION__); \
595 &_rtx->u.hwint[_n]; }))
596
597 #define XCWINT(RTX, N, C) __extension__ \
598 (*({ __typeof (RTX) const _rtx = (RTX); \
599 if (GET_CODE (_rtx) != (C)) \
600 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
601 __FUNCTION__); \
602 &_rtx->u.hwint[N]; }))
603
604 #define XCMWINT(RTX, N, C, M) __extension__ \
605 (*({ __typeof (RTX) const _rtx = (RTX); \
606 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
607 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
608 __LINE__, __FUNCTION__); \
609 &_rtx->u.hwint[N]; }))
610
611 #define XCNMPRV(RTX, C, M) __extension__ \
612 ({ __typeof (RTX) const _rtx = (RTX); \
613 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
614 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
615 __LINE__, __FUNCTION__); \
616 &_rtx->u.rv; })
617
618 #define XCNMPFV(RTX, C, M) __extension__ \
619 ({ __typeof (RTX) const _rtx = (RTX); \
620 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
621 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
622 __LINE__, __FUNCTION__); \
623 &_rtx->u.fv; })
624
625 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
626 ({ __typeof (RTX) const _symbol = (RTX); \
627 const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
628 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
629 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
630 __FUNCTION__); \
631 &_symbol->u.block_sym; })
632
633 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
634 const char *)
635 ATTRIBUTE_NORETURN;
636 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
637 const char *)
638 ATTRIBUTE_NORETURN;
639 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
640 int, const char *)
641 ATTRIBUTE_NORETURN;
642 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
643 int, const char *)
644 ATTRIBUTE_NORETURN;
645 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
646 const char *, int, const char *)
647 ATTRIBUTE_NORETURN;
648 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
649 bool, const char *, int, const char *)
650 ATTRIBUTE_NORETURN;
651 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
652 ATTRIBUTE_NORETURN;
653 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
654 const char *)
655 ATTRIBUTE_NORETURN;
656
657 #else /* not ENABLE_RTL_CHECKING */
658
659 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
660 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
661 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
662 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
663 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
664 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
665 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
666 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
667 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
668 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
669 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
670 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
671
672 #endif
673
674 /* General accessor macros for accessing the flags of an rtx. */
675
676 /* Access an individual rtx flag, with no checking of any kind. */
677 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
678
679 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
680 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
681 ({ __typeof (RTX) const _rtx = (RTX); \
682 if (GET_CODE(_rtx) != C1) \
683 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
684 __FUNCTION__); \
685 _rtx; })
686
687 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
688 ({ __typeof (RTX) const _rtx = (RTX); \
689 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \
690 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
691 __FUNCTION__); \
692 _rtx; })
693
694 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
695 ({ __typeof (RTX) const _rtx = (RTX); \
696 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
697 && GET_CODE(_rtx) != C3) \
698 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
699 __FUNCTION__); \
700 _rtx; })
701
702 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
703 ({ __typeof (RTX) const _rtx = (RTX); \
704 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
705 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \
706 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
707 __FUNCTION__); \
708 _rtx; })
709
710 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
711 ({ __typeof (RTX) const _rtx = (RTX); \
712 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
713 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
714 && GET_CODE(_rtx) != C5) \
715 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
716 __FUNCTION__); \
717 _rtx; })
718
719 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
720 __extension__ \
721 ({ __typeof (RTX) const _rtx = (RTX); \
722 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
723 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
724 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \
725 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
726 __FUNCTION__); \
727 _rtx; })
728
729 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
730 __extension__ \
731 ({ __typeof (RTX) const _rtx = (RTX); \
732 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
733 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
734 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
735 && GET_CODE(_rtx) != C7) \
736 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
737 __FUNCTION__); \
738 _rtx; })
739
740 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \
741 __extension__ \
742 ({ __typeof (RTX) const _rtx = (RTX); \
743 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \
744 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \
745 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \
746 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \
747 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
748 __FUNCTION__); \
749 _rtx; })
750
751 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
752 int, const char *)
753 ATTRIBUTE_NORETURN
754 ;
755
756 #else /* not ENABLE_RTL_FLAG_CHECKING */
757
758 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
759 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
760 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
761 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
762 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
763 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
764 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
765 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX)
766 #endif
767
768 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
769 #define XUINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_uint)
770 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
771 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
772 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
773 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
774 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
775 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
776 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
777 #define XCFI(RTX, N) (RTL_CHECK1 (RTX, N, 'C').rt_cfi)
778
779 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
780 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
781
782 /* These are like XINT, etc. except that they expect a '0' field instead
783 of the normal type code. */
784
785 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
786 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
787 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
788 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
789 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
790 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
791 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
792 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
793 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
794 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
795 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
796 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg)
797 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
798
799 /* Access a '0' field with any type. */
800 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
801
802 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
803 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
804 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
805 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
806 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
807 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
808 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
809 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
810 #define XCCFI(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cfi)
811 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
812
813 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
814 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
815
816 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
817 \f
818 /* ACCESS MACROS for particular fields of insns. */
819
820 /* Holds a unique number for each insn.
821 These are not necessarily sequentially increasing. */
822 #define INSN_UID(INSN) XINT (INSN, 0)
823
824 /* Chain insns together in sequence. */
825 #define PREV_INSN(INSN) XEXP (INSN, 1)
826 #define NEXT_INSN(INSN) XEXP (INSN, 2)
827
828 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
829
830 /* The body of an insn. */
831 #define PATTERN(INSN) XEXP (INSN, 4)
832
833 #define INSN_LOCATION(INSN) XUINT (INSN, 5)
834
835 #define INSN_HAS_LOCATION(INSN) ((LOCATION_LOCUS (INSN_LOCATION (INSN)))\
836 != UNKNOWN_LOCATION)
837
838 /* LOCATION of an RTX if relevant. */
839 #define RTL_LOCATION(X) (INSN_P (X) ? \
840 INSN_LOCATION (X) : UNKNOWN_LOCATION)
841
842 /* Code number of instruction, from when it was recognized.
843 -1 means this instruction has not been recognized yet. */
844 #define INSN_CODE(INSN) XINT (INSN, 6)
845
846 #define RTX_FRAME_RELATED_P(RTX) \
847 (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
848 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
849
850 /* 1 if RTX is an insn that has been deleted. */
851 #define INSN_DELETED_P(RTX) \
852 (RTL_FLAG_CHECK8("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN, \
853 CALL_INSN, JUMP_INSN, JUMP_TABLE_DATA, \
854 CODE_LABEL, BARRIER, NOTE)->volatil)
855
856 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
857 TREE_READONLY. */
858 #define RTL_CONST_CALL_P(RTX) \
859 (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
860
861 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
862 DECL_PURE_P. */
863 #define RTL_PURE_CALL_P(RTX) \
864 (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
865
866 /* 1 if RTX is a call to a const or pure function. */
867 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
868 (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
869
870 /* 1 if RTX is a call to a looping const or pure function. Built from
871 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
872 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
873 (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
874
875 /* 1 if RTX is a call_insn for a sibling call. */
876 #define SIBLING_CALL_P(RTX) \
877 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
878
879 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
880 #define INSN_ANNULLED_BRANCH_P(RTX) \
881 (RTL_FLAG_CHECK1("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN)->unchanging)
882
883 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
884 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
885 executed if the branch is taken. For annulled branches with this bit
886 clear, the insn should be executed only if the branch is not taken. */
887 #define INSN_FROM_TARGET_P(RTX) \
888 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
889
890 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
891 See the comments for ADDR_DIFF_VEC in rtl.def. */
892 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
893
894 /* In a VALUE, the value cselib has assigned to RTX.
895 This is a "struct cselib_val_struct", see cselib.h. */
896 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
897
898 /* Holds a list of notes on what this insn does to various REGs.
899 It is a chain of EXPR_LIST rtx's, where the second operand is the
900 chain pointer and the first operand is the REG being described.
901 The mode field of the EXPR_LIST contains not a real machine mode
902 but a value from enum reg_note. */
903 #define REG_NOTES(INSN) XEXP(INSN, 7)
904
905 /* In an ENTRY_VALUE this is the DECL_INCOMING_RTL of the argument in
906 question. */
907 #define ENTRY_VALUE_EXP(RTX) (RTL_CHECKC1 (RTX, 0, ENTRY_VALUE).rt_rtx)
908
909 enum reg_note
910 {
911 #define DEF_REG_NOTE(NAME) NAME,
912 #include "reg-notes.def"
913 #undef DEF_REG_NOTE
914 REG_NOTE_MAX
915 };
916
917 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
918 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
919 #define PUT_REG_NOTE_KIND(LINK, KIND) \
920 PUT_MODE (LINK, (enum machine_mode) (KIND))
921
922 /* Names for REG_NOTE's in EXPR_LIST insn's. */
923
924 extern const char * const reg_note_name[];
925 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
926
927 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
928 USE and CLOBBER expressions.
929 USE expressions list the registers filled with arguments that
930 are passed to the function.
931 CLOBBER expressions document the registers explicitly clobbered
932 by this CALL_INSN.
933 Pseudo registers can not be mentioned in this list. */
934 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 8)
935
936 /* The label-number of a code-label. The assembler label
937 is made from `L' and the label-number printed in decimal.
938 Label numbers are unique in a compilation. */
939 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
940
941 /* In a NOTE that is a line number, this is a string for the file name that the
942 line is in. We use the same field to record block numbers temporarily in
943 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
944 between ints and pointers if we use a different macro for the block number.)
945 */
946
947 /* Opaque data. */
948 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE)
949 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
950 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
951 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE)
952 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE)
953 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE)
954 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
955 #define NOTE_CFI(INSN) XCCFI (INSN, 4, NOTE)
956 #define NOTE_LABEL_NUMBER(INSN) XCINT (INSN, 4, NOTE)
957
958 /* In a NOTE that is a line number, this is the line number.
959 Other kinds of NOTEs are identified by negative numbers here. */
960 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
961
962 /* Nonzero if INSN is a note marking the beginning of a basic block. */
963 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
964 (NOTE_P (INSN) && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
965
966 /* Variable declaration and the location of a variable. */
967 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
968 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
969
970 /* Initialization status of the variable in the location. Status
971 can be unknown, uninitialized or initialized. See enumeration
972 type below. */
973 #define PAT_VAR_LOCATION_STATUS(PAT) \
974 ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
975
976 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
977 #define NOTE_VAR_LOCATION_DECL(NOTE) \
978 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
979 #define NOTE_VAR_LOCATION_LOC(NOTE) \
980 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
981 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
982 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
983
984 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
985 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
986
987 /* Accessors for a tree-expanded var location debug insn. */
988 #define INSN_VAR_LOCATION_DECL(INSN) \
989 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
990 #define INSN_VAR_LOCATION_LOC(INSN) \
991 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
992 #define INSN_VAR_LOCATION_STATUS(INSN) \
993 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
994
995 /* Expand to the RTL that denotes an unknown variable location in a
996 DEBUG_INSN. */
997 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
998
999 /* Determine whether X is such an unknown location. */
1000 #define VAR_LOC_UNKNOWN_P(X) \
1001 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
1002
1003 /* 1 if RTX is emitted after a call, but it should take effect before
1004 the call returns. */
1005 #define NOTE_DURING_CALL_P(RTX) \
1006 (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
1007
1008 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
1009 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
1010
1011 /* VAR_DECL/PARM_DECL DEBUG_IMPLICIT_PTR takes address of. */
1012 #define DEBUG_IMPLICIT_PTR_DECL(RTX) XCTREE (RTX, 0, DEBUG_IMPLICIT_PTR)
1013
1014 /* PARM_DECL DEBUG_PARAMETER_REF references. */
1015 #define DEBUG_PARAMETER_REF_DECL(RTX) XCTREE (RTX, 0, DEBUG_PARAMETER_REF)
1016
1017 /* Codes that appear in the NOTE_KIND field for kinds of notes
1018 that are not line numbers. These codes are all negative.
1019
1020 Notice that we do not try to use zero here for any of
1021 the special note codes because sometimes the source line
1022 actually can be zero! This happens (for example) when we
1023 are generating code for the per-translation-unit constructor
1024 and destructor routines for some C++ translation unit. */
1025
1026 enum insn_note
1027 {
1028 #define DEF_INSN_NOTE(NAME) NAME,
1029 #include "insn-notes.def"
1030 #undef DEF_INSN_NOTE
1031
1032 NOTE_INSN_MAX
1033 };
1034
1035 /* Names for NOTE insn's other than line numbers. */
1036
1037 extern const char * const note_insn_name[NOTE_INSN_MAX];
1038 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1039 (note_insn_name[(NOTE_CODE)])
1040
1041 /* The name of a label, in case it corresponds to an explicit label
1042 in the input source code. */
1043 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
1044
1045 /* In jump.c, each label contains a count of the number
1046 of LABEL_REFs that point at it, so unused labels can be deleted. */
1047 #define LABEL_NUSES(RTX) XCINT (RTX, 5, CODE_LABEL)
1048
1049 /* Labels carry a two-bit field composed of the ->jump and ->call
1050 bits. This field indicates whether the label is an alternate
1051 entry point, and if so, what kind. */
1052 enum label_kind
1053 {
1054 LABEL_NORMAL = 0, /* ordinary label */
1055 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1056 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1057 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1058 };
1059
1060 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1061
1062 /* Retrieve the kind of LABEL. */
1063 #define LABEL_KIND(LABEL) __extension__ \
1064 ({ __typeof (LABEL) const _label = (LABEL); \
1065 if (! LABEL_P (_label)) \
1066 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1067 __FUNCTION__); \
1068 (enum label_kind) ((_label->jump << 1) | _label->call); })
1069
1070 /* Set the kind of LABEL. */
1071 #define SET_LABEL_KIND(LABEL, KIND) do { \
1072 __typeof (LABEL) const _label = (LABEL); \
1073 const unsigned int _kind = (KIND); \
1074 if (! LABEL_P (_label)) \
1075 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1076 __FUNCTION__); \
1077 _label->jump = ((_kind >> 1) & 1); \
1078 _label->call = (_kind & 1); \
1079 } while (0)
1080
1081 #else
1082
1083 /* Retrieve the kind of LABEL. */
1084 #define LABEL_KIND(LABEL) \
1085 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1086
1087 /* Set the kind of LABEL. */
1088 #define SET_LABEL_KIND(LABEL, KIND) do { \
1089 rtx const _label = (LABEL); \
1090 const unsigned int _kind = (KIND); \
1091 _label->jump = ((_kind >> 1) & 1); \
1092 _label->call = (_kind & 1); \
1093 } while (0)
1094
1095 #endif /* rtl flag checking */
1096
1097 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1098
1099 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1100 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1101 be decremented and possibly the label can be deleted. */
1102 #define JUMP_LABEL(INSN) XCEXP (INSN, 8, JUMP_INSN)
1103
1104 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1105 goes through all the LABEL_REFs that jump to that label. The chain
1106 eventually winds up at the CODE_LABEL: it is circular. */
1107 #define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
1108 \f
1109 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1110 be used on RHS. Use SET_REGNO to change the value. */
1111 #define REGNO(RTX) (rhs_regno(RTX))
1112 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1113 #define SET_REGNO_RAW(RTX,N) (XCUINT (RTX, 0, REG) = N)
1114
1115 /* ORIGINAL_REGNO holds the number the register originally had; for a
1116 pseudo register turned into a hard reg this will hold the old pseudo
1117 register number. */
1118 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1119
1120 /* Force the REGNO macro to only be used on the lhs. */
1121 static inline unsigned int
1122 rhs_regno (const_rtx x)
1123 {
1124 return XCUINT (x, 0, REG);
1125 }
1126
1127
1128 /* 1 if RTX is a reg or parallel that is the current function's return
1129 value. */
1130 #define REG_FUNCTION_VALUE_P(RTX) \
1131 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1132
1133 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1134 #define REG_USERVAR_P(RTX) \
1135 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1136
1137 /* 1 if RTX is a reg that holds a pointer value. */
1138 #define REG_POINTER(RTX) \
1139 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1140
1141 /* 1 if RTX is a mem that holds a pointer value. */
1142 #define MEM_POINTER(RTX) \
1143 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1144
1145 /* 1 if the given register REG corresponds to a hard register. */
1146 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1147
1148 /* 1 if the given register number REG_NO corresponds to a hard register. */
1149 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1150
1151 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1152 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1153 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1154
1155 /* For a CONST_DOUBLE:
1156 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1157 low-order word and ..._HIGH the high-order.
1158 For a float, there is a REAL_VALUE_TYPE structure, and
1159 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1160 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1161 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1162 #define CONST_DOUBLE_REAL_VALUE(r) \
1163 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1164
1165 #define CONST_FIXED_VALUE(r) \
1166 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1167 #define CONST_FIXED_VALUE_HIGH(r) \
1168 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1169 #define CONST_FIXED_VALUE_LOW(r) \
1170 ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1171
1172 /* For a CONST_VECTOR, return element #n. */
1173 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1174
1175 /* For a CONST_VECTOR, return the number of elements in a vector. */
1176 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1177
1178 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1179 SUBREG_BYTE extracts the byte-number. */
1180
1181 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1182 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1183
1184 /* in rtlanal.c */
1185 /* Return the right cost to give to an operation
1186 to make the cost of the corresponding register-to-register instruction
1187 N times that of a fast register-to-register instruction. */
1188 #define COSTS_N_INSNS(N) ((N) * 4)
1189
1190 /* Maximum cost of an rtl expression. This value has the special meaning
1191 not to use an rtx with this cost under any circumstances. */
1192 #define MAX_COST INT_MAX
1193
1194 /* A structure to hold all available cost information about an rtl
1195 expression. */
1196 struct full_rtx_costs
1197 {
1198 int speed;
1199 int size;
1200 };
1201
1202 /* Initialize a full_rtx_costs structure C to the maximum cost. */
1203 static inline void
1204 init_costs_to_max (struct full_rtx_costs *c)
1205 {
1206 c->speed = MAX_COST;
1207 c->size = MAX_COST;
1208 }
1209
1210 /* Initialize a full_rtx_costs structure C to zero cost. */
1211 static inline void
1212 init_costs_to_zero (struct full_rtx_costs *c)
1213 {
1214 c->speed = 0;
1215 c->size = 0;
1216 }
1217
1218 /* Compare two full_rtx_costs structures A and B, returning true
1219 if A < B when optimizing for speed. */
1220 static inline bool
1221 costs_lt_p (struct full_rtx_costs *a, struct full_rtx_costs *b,
1222 bool speed)
1223 {
1224 if (speed)
1225 return (a->speed < b->speed
1226 || (a->speed == b->speed && a->size < b->size));
1227 else
1228 return (a->size < b->size
1229 || (a->size == b->size && a->speed < b->speed));
1230 }
1231
1232 /* Increase both members of the full_rtx_costs structure C by the
1233 cost of N insns. */
1234 static inline void
1235 costs_add_n_insns (struct full_rtx_costs *c, int n)
1236 {
1237 c->speed += COSTS_N_INSNS (n);
1238 c->size += COSTS_N_INSNS (n);
1239 }
1240
1241 /* Information about an address. This structure is supposed to be able
1242 to represent all supported target addresses. Please extend it if it
1243 is not yet general enough. */
1244 struct address_info {
1245 /* The mode of the value being addressed, or VOIDmode if this is
1246 a load-address operation with no known address mode. */
1247 enum machine_mode mode;
1248
1249 /* The address space. */
1250 addr_space_t as;
1251
1252 /* A pointer to the top-level address. */
1253 rtx *outer;
1254
1255 /* A pointer to the inner address, after all address mutations
1256 have been stripped from the top-level address. It can be one
1257 of the following:
1258
1259 - A {PRE,POST}_{INC,DEC} of *BASE. SEGMENT, INDEX and DISP are null.
1260
1261 - A {PRE,POST}_MODIFY of *BASE. In this case either INDEX or DISP
1262 points to the step value, depending on whether the step is variable
1263 or constant respectively. SEGMENT is null.
1264
1265 - A plain sum of the form SEGMENT + BASE + INDEX + DISP,
1266 with null fields evaluating to 0. */
1267 rtx *inner;
1268
1269 /* Components that make up *INNER. Each one may be null or nonnull.
1270 When nonnull, their meanings are as follows:
1271
1272 - *SEGMENT is the "segment" of memory to which the address refers.
1273 This value is entirely target-specific and is only called a "segment"
1274 because that's its most typical use. It contains exactly one UNSPEC,
1275 pointed to by SEGMENT_TERM. The contents of *SEGMENT do not need
1276 reloading.
1277
1278 - *BASE is a variable expression representing a base address.
1279 It contains exactly one REG, SUBREG or MEM, pointed to by BASE_TERM.
1280
1281 - *INDEX is a variable expression representing an index value.
1282 It may be a scaled expression, such as a MULT. It has exactly
1283 one REG, SUBREG or MEM, pointed to by INDEX_TERM.
1284
1285 - *DISP is a constant, possibly mutated. DISP_TERM points to the
1286 unmutated RTX_CONST_OBJ. */
1287 rtx *segment;
1288 rtx *base;
1289 rtx *index;
1290 rtx *disp;
1291
1292 rtx *segment_term;
1293 rtx *base_term;
1294 rtx *index_term;
1295 rtx *disp_term;
1296
1297 /* In a {PRE,POST}_MODIFY address, this points to a second copy
1298 of BASE_TERM, otherwise it is null. */
1299 rtx *base_term2;
1300
1301 /* ADDRESS if this structure describes an address operand, MEM if
1302 it describes a MEM address. */
1303 enum rtx_code addr_outer_code;
1304
1305 /* If BASE is nonnull, this is the code of the rtx that contains it. */
1306 enum rtx_code base_outer_code;
1307
1308 /* True if this is an RTX_AUTOINC address. */
1309 bool autoinc_p;
1310 };
1311
1312 extern void init_rtlanal (void);
1313 extern int rtx_cost (rtx, enum rtx_code, int, bool);
1314 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1315 extern void get_full_rtx_cost (rtx, enum rtx_code, int,
1316 struct full_rtx_costs *);
1317 extern unsigned int subreg_lsb (const_rtx);
1318 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1319 unsigned int);
1320 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1321 unsigned int, enum machine_mode);
1322 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1323 unsigned int, enum machine_mode);
1324 extern unsigned int subreg_regno (const_rtx);
1325 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1326 unsigned int, enum machine_mode);
1327 extern unsigned int subreg_nregs (const_rtx);
1328 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1329 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1330 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1331 extern bool constant_pool_constant_p (rtx);
1332 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1333 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1334 extern void split_double (rtx, rtx *, rtx *);
1335 extern rtx *strip_address_mutations (rtx *, enum rtx_code * = 0);
1336 extern void decompose_address (struct address_info *, rtx *,
1337 enum machine_mode, addr_space_t, enum rtx_code);
1338 extern void decompose_lea_address (struct address_info *, rtx *);
1339 extern void decompose_mem_address (struct address_info *, rtx);
1340 extern void update_address (struct address_info *);
1341 extern HOST_WIDE_INT get_index_scale (const struct address_info *);
1342 extern enum rtx_code get_index_code (const struct address_info *);
1343
1344 #ifndef GENERATOR_FILE
1345 /* Return the cost of SET X. SPEED_P is true if optimizing for speed
1346 rather than size. */
1347
1348 static inline int
1349 set_rtx_cost (rtx x, bool speed_p)
1350 {
1351 return rtx_cost (x, INSN, 4, speed_p);
1352 }
1353
1354 /* Like set_rtx_cost, but return both the speed and size costs in C. */
1355
1356 static inline void
1357 get_full_set_rtx_cost (rtx x, struct full_rtx_costs *c)
1358 {
1359 get_full_rtx_cost (x, INSN, 4, c);
1360 }
1361
1362 /* Return the cost of moving X into a register, relative to the cost
1363 of a register move. SPEED_P is true if optimizing for speed rather
1364 than size. */
1365
1366 static inline int
1367 set_src_cost (rtx x, bool speed_p)
1368 {
1369 return rtx_cost (x, SET, 1, speed_p);
1370 }
1371
1372 /* Like set_src_cost, but return both the speed and size costs in C. */
1373
1374 static inline void
1375 get_full_set_src_cost (rtx x, struct full_rtx_costs *c)
1376 {
1377 get_full_rtx_cost (x, SET, 1, c);
1378 }
1379 #endif
1380
1381 /* 1 if RTX is a subreg containing a reg that is already known to be
1382 sign- or zero-extended from the mode of the subreg to the mode of
1383 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1384 extension.
1385
1386 When used as a LHS, is means that this extension must be done
1387 when assigning to SUBREG_REG. */
1388
1389 #define SUBREG_PROMOTED_VAR_P(RTX) \
1390 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1391
1392 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \
1393 do { \
1394 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1395 if ((VAL) < 0) \
1396 _rtx->volatil = 1; \
1397 else { \
1398 _rtx->volatil = 0; \
1399 _rtx->unchanging = (VAL); \
1400 } \
1401 } while (0)
1402
1403 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
1404 this gives the necessary extensions:
1405 0 - signed
1406 1 - normal unsigned
1407 -1 - pointer unsigned, which most often can be handled like unsigned
1408 extension, except for generating instructions where we need to
1409 emit special code (ptr_extend insns) on some architectures. */
1410
1411 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1412 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1413 ? -1 : (int) (RTX)->unchanging)
1414
1415 /* True if the subreg was generated by LRA for reload insns. Such
1416 subregs are valid only during LRA. */
1417 #define LRA_SUBREG_P(RTX) \
1418 (RTL_FLAG_CHECK1("LRA_SUBREG_P", (RTX), SUBREG)->jump)
1419
1420 /* Access various components of an ASM_OPERANDS rtx. */
1421
1422 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1423 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1424 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1425 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1426 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1427 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1428 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1429 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1430 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1431 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1432 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1433 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
1434 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1435 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1436 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1437 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1438 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1439 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1440
1441 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
1442 #define MEM_READONLY_P(RTX) \
1443 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1444
1445 /* 1 if RTX is a mem and we should keep the alias set for this mem
1446 unchanged when we access a component. Set to 1, or example, when we
1447 are already in a non-addressable component of an aggregate. */
1448 #define MEM_KEEP_ALIAS_SET_P(RTX) \
1449 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1450
1451 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
1452 #define MEM_VOLATILE_P(RTX) \
1453 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
1454 ASM_INPUT)->volatil)
1455
1456 /* 1 if RTX is a mem that cannot trap. */
1457 #define MEM_NOTRAP_P(RTX) \
1458 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1459
1460 /* The memory attribute block. We provide access macros for each value
1461 in the block and provide defaults if none specified. */
1462 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1463
1464 /* The register attribute block. We provide access macros for each value
1465 in the block and provide defaults if none specified. */
1466 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1467
1468 #ifndef GENERATOR_FILE
1469 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
1470 set, and may alias anything. Otherwise, the MEM can only alias
1471 MEMs in a conflicting alias set. This value is set in a
1472 language-dependent manner in the front-end, and should not be
1473 altered in the back-end. These set numbers are tested with
1474 alias_sets_conflict_p. */
1475 #define MEM_ALIAS_SET(RTX) (get_mem_attrs (RTX)->alias)
1476
1477 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1478 refer to part of a DECL. It may also be a COMPONENT_REF. */
1479 #define MEM_EXPR(RTX) (get_mem_attrs (RTX)->expr)
1480
1481 /* For a MEM rtx, true if its MEM_OFFSET is known. */
1482 #define MEM_OFFSET_KNOWN_P(RTX) (get_mem_attrs (RTX)->offset_known_p)
1483
1484 /* For a MEM rtx, the offset from the start of MEM_EXPR. */
1485 #define MEM_OFFSET(RTX) (get_mem_attrs (RTX)->offset)
1486
1487 /* For a MEM rtx, the address space. */
1488 #define MEM_ADDR_SPACE(RTX) (get_mem_attrs (RTX)->addrspace)
1489
1490 /* For a MEM rtx, true if its MEM_SIZE is known. */
1491 #define MEM_SIZE_KNOWN_P(RTX) (get_mem_attrs (RTX)->size_known_p)
1492
1493 /* For a MEM rtx, the size in bytes of the MEM. */
1494 #define MEM_SIZE(RTX) (get_mem_attrs (RTX)->size)
1495
1496 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
1497 mode as a default when STRICT_ALIGNMENT, but not if not. */
1498 #define MEM_ALIGN(RTX) (get_mem_attrs (RTX)->align)
1499 #else
1500 #define MEM_ADDR_SPACE(RTX) ADDR_SPACE_GENERIC
1501 #endif
1502
1503 /* For a REG rtx, the decl it is known to refer to, if it is known to
1504 refer to part of a DECL. */
1505 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1506
1507 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1508 HOST_WIDE_INT. */
1509 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1510
1511 /* Copy the attributes that apply to memory locations from RHS to LHS. */
1512 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
1513 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
1514 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
1515 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
1516 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
1517 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
1518 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1519
1520 /* 1 if RTX is a label_ref for a nonlocal label. */
1521 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1522 REG_LABEL_TARGET note. */
1523 #define LABEL_REF_NONLOCAL_P(RTX) \
1524 (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1525
1526 /* 1 if RTX is a code_label that should always be considered to be needed. */
1527 #define LABEL_PRESERVE_P(RTX) \
1528 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1529
1530 /* During sched, 1 if RTX is an insn that must be scheduled together
1531 with the preceding insn. */
1532 #define SCHED_GROUP_P(RTX) \
1533 (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
1534 JUMP_INSN, CALL_INSN \
1535 )->in_struct)
1536
1537 /* For a SET rtx, SET_DEST is the place that is set
1538 and SET_SRC is the value it is set to. */
1539 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1540 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1541 #define SET_IS_RETURN_P(RTX) \
1542 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1543
1544 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
1545 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1546 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1547
1548 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1549 conditionally executing the code on, COND_EXEC_CODE is the code
1550 to execute if the condition is true. */
1551 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1552 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1553
1554 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1555 constants pool. */
1556 #define CONSTANT_POOL_ADDRESS_P(RTX) \
1557 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1558
1559 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1560 tree constant pool. This information is private to varasm.c. */
1561 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
1562 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \
1563 (RTX), SYMBOL_REF)->frame_related)
1564
1565 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
1566 #define SYMBOL_REF_FLAG(RTX) \
1567 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1568
1569 /* 1 if RTX is a symbol_ref that has been the library function in
1570 emit_library_call. */
1571 #define SYMBOL_REF_USED(RTX) \
1572 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1573
1574 /* 1 if RTX is a symbol_ref for a weak symbol. */
1575 #define SYMBOL_REF_WEAK(RTX) \
1576 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1577
1578 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1579 SYMBOL_REF_CONSTANT. */
1580 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1581
1582 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
1583 pool symbol. */
1584 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1585 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1586
1587 /* The tree (decl or constant) associated with the symbol, or null. */
1588 #define SYMBOL_REF_DECL(RTX) \
1589 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1590
1591 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
1592 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1593 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1594
1595 /* The rtx constant pool entry for a symbol, or null. */
1596 #define SYMBOL_REF_CONSTANT(RTX) \
1597 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1598
1599 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1600 information derivable from the tree decl associated with this symbol.
1601 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1602 decl. In some cases this is a bug. But beyond that, it's nice to cache
1603 this information to avoid recomputing it. Finally, this allows space for
1604 the target to store more than one bit of information, as with
1605 SYMBOL_REF_FLAG. */
1606 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1)
1607
1608 /* These flags are common enough to be defined for all targets. They
1609 are computed by the default version of targetm.encode_section_info. */
1610
1611 /* Set if this symbol is a function. */
1612 #define SYMBOL_FLAG_FUNCTION (1 << 0)
1613 #define SYMBOL_REF_FUNCTION_P(RTX) \
1614 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1615 /* Set if targetm.binds_local_p is true. */
1616 #define SYMBOL_FLAG_LOCAL (1 << 1)
1617 #define SYMBOL_REF_LOCAL_P(RTX) \
1618 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1619 /* Set if targetm.in_small_data_p is true. */
1620 #define SYMBOL_FLAG_SMALL (1 << 2)
1621 #define SYMBOL_REF_SMALL_P(RTX) \
1622 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1623 /* The three-bit field at [5:3] is true for TLS variables; use
1624 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
1625 #define SYMBOL_FLAG_TLS_SHIFT 3
1626 #define SYMBOL_REF_TLS_MODEL(RTX) \
1627 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1628 /* Set if this symbol is not defined in this translation unit. */
1629 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
1630 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1631 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1632 /* Set if this symbol has a block_symbol structure associated with it. */
1633 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1634 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1635 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1636 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
1637 SYMBOL_REF_HAS_BLOCK_INFO_P. */
1638 #define SYMBOL_FLAG_ANCHOR (1 << 8)
1639 #define SYMBOL_REF_ANCHOR_P(RTX) \
1640 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1641
1642 /* Subsequent bits are available for the target to use. */
1643 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
1644 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1645
1646 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1647 structure to which the symbol belongs, or NULL if it has not been
1648 assigned a block. */
1649 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1650
1651 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1652 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
1653 RTX has not yet been assigned to a block, or it has not been given an
1654 offset within that block. */
1655 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1656
1657 /* True if RTX is flagged to be a scheduling barrier. */
1658 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
1659 (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1660
1661 /* Indicate whether the machine has any sort of auto increment addressing.
1662 If not, we can avoid checking for REG_INC notes. */
1663
1664 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1665 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1666 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_POST_MODIFY_DISP) \
1667 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1668 #define AUTO_INC_DEC
1669 #endif
1670
1671 /* Define a macro to look for REG_INC notes,
1672 but save time on machines where they never exist. */
1673
1674 #ifdef AUTO_INC_DEC
1675 #define FIND_REG_INC_NOTE(INSN, REG) \
1676 ((REG) != NULL_RTX && REG_P ((REG)) \
1677 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
1678 : find_reg_note ((INSN), REG_INC, (REG)))
1679 #else
1680 #define FIND_REG_INC_NOTE(INSN, REG) 0
1681 #endif
1682
1683 #ifndef HAVE_PRE_INCREMENT
1684 #define HAVE_PRE_INCREMENT 0
1685 #endif
1686
1687 #ifndef HAVE_PRE_DECREMENT
1688 #define HAVE_PRE_DECREMENT 0
1689 #endif
1690
1691 #ifndef HAVE_POST_INCREMENT
1692 #define HAVE_POST_INCREMENT 0
1693 #endif
1694
1695 #ifndef HAVE_POST_DECREMENT
1696 #define HAVE_POST_DECREMENT 0
1697 #endif
1698
1699 #ifndef HAVE_POST_MODIFY_DISP
1700 #define HAVE_POST_MODIFY_DISP 0
1701 #endif
1702
1703 #ifndef HAVE_POST_MODIFY_REG
1704 #define HAVE_POST_MODIFY_REG 0
1705 #endif
1706
1707 #ifndef HAVE_PRE_MODIFY_DISP
1708 #define HAVE_PRE_MODIFY_DISP 0
1709 #endif
1710
1711 #ifndef HAVE_PRE_MODIFY_REG
1712 #define HAVE_PRE_MODIFY_REG 0
1713 #endif
1714
1715
1716 /* Some architectures do not have complete pre/post increment/decrement
1717 instruction sets, or only move some modes efficiently. These macros
1718 allow us to tune autoincrement generation. */
1719
1720 #ifndef USE_LOAD_POST_INCREMENT
1721 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1722 #endif
1723
1724 #ifndef USE_LOAD_POST_DECREMENT
1725 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1726 #endif
1727
1728 #ifndef USE_LOAD_PRE_INCREMENT
1729 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1730 #endif
1731
1732 #ifndef USE_LOAD_PRE_DECREMENT
1733 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1734 #endif
1735
1736 #ifndef USE_STORE_POST_INCREMENT
1737 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
1738 #endif
1739
1740 #ifndef USE_STORE_POST_DECREMENT
1741 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
1742 #endif
1743
1744 #ifndef USE_STORE_PRE_INCREMENT
1745 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
1746 #endif
1747
1748 #ifndef USE_STORE_PRE_DECREMENT
1749 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
1750 #endif
1751 \f
1752 /* Nonzero when we are generating CONCATs. */
1753 extern int generating_concat_p;
1754
1755 /* Nonzero when we are expanding trees to RTL. */
1756 extern int currently_expanding_to_rtl;
1757
1758 /* Generally useful functions. */
1759
1760 /* In explow.c */
1761 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1762 extern rtx plus_constant (enum machine_mode, rtx, HOST_WIDE_INT);
1763
1764 /* In rtl.c */
1765 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1766 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1767
1768 extern rtvec rtvec_alloc (int);
1769 extern rtvec shallow_copy_rtvec (rtvec);
1770 extern bool shared_const_p (const_rtx);
1771 extern rtx copy_rtx (rtx);
1772 extern void dump_rtx_statistics (void);
1773
1774 /* In emit-rtl.c */
1775 extern rtx copy_rtx_if_shared (rtx);
1776
1777 /* In rtl.c */
1778 extern unsigned int rtx_size (const_rtx);
1779 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1780 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1781 extern int rtx_equal_p (const_rtx, const_rtx);
1782 extern hashval_t iterative_hash_rtx (const_rtx, hashval_t);
1783
1784 /* In emit-rtl.c */
1785 extern rtvec gen_rtvec_v (int, rtx *);
1786 extern rtx gen_reg_rtx (enum machine_mode);
1787 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1788 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1789 extern rtx gen_reg_rtx_and_attrs (rtx);
1790 extern rtx gen_label_rtx (void);
1791 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1792
1793 /* In cse.c */
1794 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1795
1796 /* In emit-rtl.c */
1797 extern rtx gen_highpart (enum machine_mode, rtx);
1798 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1799 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1800
1801 /* In emit-rtl.c */
1802 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1803 extern bool paradoxical_subreg_p (const_rtx);
1804 extern int subreg_lowpart_p (const_rtx);
1805 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1806 enum machine_mode);
1807 extern unsigned int subreg_highpart_offset (enum machine_mode,
1808 enum machine_mode);
1809 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1810 extern rtx make_safe_from (rtx, rtx);
1811 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1812 addr_space_t);
1813 #define convert_memory_address(to_mode,x) \
1814 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1815 extern const char *get_insn_name (int);
1816 extern rtx get_last_insn_anywhere (void);
1817 extern rtx get_first_nonnote_insn (void);
1818 extern rtx get_last_nonnote_insn (void);
1819 extern void start_sequence (void);
1820 extern void push_to_sequence (rtx);
1821 extern void push_to_sequence2 (rtx, rtx);
1822 extern void end_sequence (void);
1823 extern double_int rtx_to_double_int (const_rtx);
1824 extern rtx immed_double_int_const (double_int, enum machine_mode);
1825 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1826 enum machine_mode);
1827
1828 /* In loop-iv.c */
1829
1830 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1831
1832 /* In varasm.c */
1833 extern rtx force_const_mem (enum machine_mode, rtx);
1834
1835 /* In varasm.c */
1836
1837 struct function;
1838 extern rtx get_pool_constant (rtx);
1839 extern rtx get_pool_constant_mark (rtx, bool *);
1840 extern enum machine_mode get_pool_mode (const_rtx);
1841 extern rtx simplify_subtraction (rtx);
1842 extern void decide_function_section (tree);
1843
1844 /* In function.c */
1845 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1846 #define ASLK_REDUCE_ALIGN 1
1847 #define ASLK_RECORD_PAD 2
1848 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, int);
1849 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT);
1850 extern rtx assign_stack_temp_for_type (enum machine_mode, HOST_WIDE_INT, tree);
1851 extern rtx assign_temp (tree, int, int);
1852
1853 /* In emit-rtl.c */
1854 extern rtx emit_insn_before (rtx, rtx);
1855 extern rtx emit_insn_before_noloc (rtx, rtx, basic_block);
1856 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1857 extern rtx emit_jump_insn_before (rtx, rtx);
1858 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1859 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1860 extern rtx emit_call_insn_before (rtx, rtx);
1861 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1862 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1863 extern rtx emit_debug_insn_before (rtx, rtx);
1864 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1865 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1866 extern rtx emit_barrier_before (rtx);
1867 extern rtx emit_label_before (rtx, rtx);
1868 extern rtx emit_note_before (enum insn_note, rtx);
1869 extern rtx emit_insn_after (rtx, rtx);
1870 extern rtx emit_insn_after_noloc (rtx, rtx, basic_block);
1871 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1872 extern rtx emit_jump_insn_after (rtx, rtx);
1873 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1874 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1875 extern rtx emit_call_insn_after (rtx, rtx);
1876 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1877 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1878 extern rtx emit_debug_insn_after (rtx, rtx);
1879 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1880 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1881 extern rtx emit_barrier_after (rtx);
1882 extern rtx emit_label_after (rtx, rtx);
1883 extern rtx emit_note_after (enum insn_note, rtx);
1884 extern rtx emit_insn (rtx);
1885 extern rtx emit_debug_insn (rtx);
1886 extern rtx emit_jump_insn (rtx);
1887 extern rtx emit_call_insn (rtx);
1888 extern rtx emit_label (rtx);
1889 extern rtx emit_jump_table_data (rtx);
1890 extern rtx emit_barrier (void);
1891 extern rtx emit_note (enum insn_note);
1892 extern rtx emit_note_copy (rtx);
1893 extern rtx gen_clobber (rtx);
1894 extern rtx emit_clobber (rtx);
1895 extern rtx gen_use (rtx);
1896 extern rtx emit_use (rtx);
1897 extern rtx make_insn_raw (rtx);
1898 extern void add_function_usage_to (rtx, rtx);
1899 extern rtx last_call_insn (void);
1900 extern rtx previous_insn (rtx);
1901 extern rtx next_insn (rtx);
1902 extern rtx prev_nonnote_insn (rtx);
1903 extern rtx prev_nonnote_insn_bb (rtx);
1904 extern rtx next_nonnote_insn (rtx);
1905 extern rtx next_nonnote_insn_bb (rtx);
1906 extern rtx prev_nondebug_insn (rtx);
1907 extern rtx next_nondebug_insn (rtx);
1908 extern rtx prev_nonnote_nondebug_insn (rtx);
1909 extern rtx next_nonnote_nondebug_insn (rtx);
1910 extern rtx prev_real_insn (rtx);
1911 extern rtx next_real_insn (rtx);
1912 extern rtx prev_active_insn (rtx);
1913 extern rtx next_active_insn (rtx);
1914 extern int active_insn_p (const_rtx);
1915 extern rtx next_label (rtx);
1916 extern rtx skip_consecutive_labels (rtx);
1917 extern rtx next_cc0_user (rtx);
1918 extern rtx prev_cc0_setter (rtx);
1919
1920 /* In emit-rtl.c */
1921 extern int insn_line (const_rtx);
1922 extern const char * insn_file (const_rtx);
1923 extern tree insn_scope (const_rtx);
1924 extern location_t prologue_location, epilogue_location;
1925
1926 /* In jump.c */
1927 extern enum rtx_code reverse_condition (enum rtx_code);
1928 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1929 extern enum rtx_code swap_condition (enum rtx_code);
1930 extern enum rtx_code unsigned_condition (enum rtx_code);
1931 extern enum rtx_code signed_condition (enum rtx_code);
1932 extern void mark_jump_label (rtx, rtx, int);
1933
1934 /* In jump.c */
1935 extern rtx delete_related_insns (rtx);
1936
1937 /* In recog.c */
1938 extern rtx *find_constant_term_loc (rtx *);
1939
1940 /* In emit-rtl.c */
1941 extern rtx try_split (rtx, rtx, int);
1942 extern int split_branch_probability;
1943
1944 /* In unknown file */
1945 extern rtx split_insns (rtx, rtx);
1946
1947 /* In simplify-rtx.c */
1948 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1949 rtx, enum machine_mode);
1950 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1951 enum machine_mode);
1952 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1953 rtx, rtx);
1954 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1955 rtx);
1956 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1957 enum machine_mode, rtx, rtx, rtx);
1958 extern rtx simplify_const_relational_operation (enum rtx_code,
1959 enum machine_mode, rtx, rtx);
1960 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1961 enum machine_mode, rtx, rtx);
1962 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1963 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1964 enum machine_mode);
1965 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1966 enum machine_mode, rtx, rtx, rtx);
1967 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1968 enum machine_mode, rtx, rtx);
1969 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1970 unsigned int);
1971 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1972 unsigned int);
1973 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1974 rtx (*fn) (rtx, const_rtx, void *), void *);
1975 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1976 extern rtx simplify_rtx (const_rtx);
1977 extern rtx avoid_constant_pool_reference (rtx);
1978 extern rtx delegitimize_mem_from_attrs (rtx);
1979 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1980 extern bool val_signbit_p (enum machine_mode, unsigned HOST_WIDE_INT);
1981 extern bool val_signbit_known_set_p (enum machine_mode,
1982 unsigned HOST_WIDE_INT);
1983 extern bool val_signbit_known_clear_p (enum machine_mode,
1984 unsigned HOST_WIDE_INT);
1985
1986 /* In reginfo.c */
1987 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1988 bool);
1989
1990 /* In emit-rtl.c */
1991 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1992 extern rtx set_dst_reg_note (rtx, enum reg_note, rtx, rtx);
1993 extern void set_insn_deleted (rtx);
1994
1995 /* Functions in rtlanal.c */
1996
1997 /* Single set is implemented as macro for performance reasons. */
1998 #define single_set(I) (INSN_P (I) \
1999 ? (GET_CODE (PATTERN (I)) == SET \
2000 ? PATTERN (I) : single_set_1 (I)) \
2001 : NULL_RTX)
2002 #define single_set_1(I) single_set_2 (I, PATTERN (I))
2003
2004 /* Structure used for passing data to REPLACE_LABEL. */
2005 typedef struct replace_label_data
2006 {
2007 rtx r1;
2008 rtx r2;
2009 bool update_label_nuses;
2010 } replace_label_data;
2011
2012 extern enum machine_mode get_address_mode (rtx mem);
2013 extern int rtx_addr_can_trap_p (const_rtx);
2014 extern bool nonzero_address_p (const_rtx);
2015 extern int rtx_unstable_p (const_rtx);
2016 extern bool rtx_varies_p (const_rtx, bool);
2017 extern bool rtx_addr_varies_p (const_rtx, bool);
2018 extern rtx get_call_rtx_from (rtx);
2019 extern HOST_WIDE_INT get_integer_term (const_rtx);
2020 extern rtx get_related_value (const_rtx);
2021 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
2022 extern void split_const (rtx, rtx *, rtx *);
2023 extern bool unsigned_reg_p (rtx);
2024 extern int reg_mentioned_p (const_rtx, const_rtx);
2025 extern int count_occurrences (const_rtx, const_rtx, int);
2026 extern int reg_referenced_p (const_rtx, const_rtx);
2027 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
2028 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
2029 extern int commutative_operand_precedence (rtx);
2030 extern bool swap_commutative_operands_p (rtx, rtx);
2031 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
2032 extern int no_labels_between_p (const_rtx, const_rtx);
2033 extern int modified_in_p (const_rtx, const_rtx);
2034 extern int reg_set_p (const_rtx, const_rtx);
2035 extern rtx single_set_2 (const_rtx, const_rtx);
2036 extern int multiple_sets (const_rtx);
2037 extern int set_noop_p (const_rtx);
2038 extern int noop_move_p (const_rtx);
2039 extern rtx find_last_value (rtx, rtx *, rtx, int);
2040 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
2041 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
2042 extern const_rtx set_of (const_rtx, const_rtx);
2043 extern void record_hard_reg_sets (rtx, const_rtx, void *);
2044 extern void record_hard_reg_uses (rtx *, void *);
2045 #ifdef HARD_CONST
2046 extern void find_all_hard_reg_sets (const_rtx, HARD_REG_SET *);
2047 #endif
2048 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
2049 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
2050 extern int dead_or_set_p (const_rtx, const_rtx);
2051 extern int dead_or_set_regno_p (const_rtx, unsigned int);
2052 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
2053 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
2054 extern rtx find_reg_equal_equiv_note (const_rtx);
2055 extern rtx find_constant_src (const_rtx);
2056 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
2057 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
2058 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
2059 extern void add_reg_note (rtx, enum reg_note, rtx);
2060 extern void remove_note (rtx, const_rtx);
2061 extern void remove_reg_equal_equiv_notes (rtx);
2062 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
2063 extern int side_effects_p (const_rtx);
2064 extern int volatile_refs_p (const_rtx);
2065 extern int volatile_insn_p (const_rtx);
2066 extern int may_trap_p_1 (const_rtx, unsigned);
2067 extern int may_trap_p (const_rtx);
2068 extern int may_trap_or_fault_p (const_rtx);
2069 extern bool can_throw_internal (const_rtx);
2070 extern bool can_throw_external (const_rtx);
2071 extern bool insn_could_throw_p (const_rtx);
2072 extern bool insn_nothrow_p (const_rtx);
2073 extern bool can_nonlocal_goto (const_rtx);
2074 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
2075 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
2076 extern int inequality_comparisons_p (const_rtx);
2077 extern rtx replace_rtx (rtx, rtx, rtx);
2078 extern int replace_label (rtx *, void *);
2079 extern int rtx_referenced_p (rtx, rtx);
2080 extern bool tablejump_p (const_rtx, rtx *, rtx *);
2081 extern int computed_jump_p (const_rtx);
2082
2083 typedef int (*rtx_function) (rtx *, void *);
2084 extern int for_each_rtx (rtx *, rtx_function, void *);
2085
2086 /* Callback for for_each_inc_dec, to process the autoinc operation OP
2087 within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is
2088 NULL. The callback is passed the same opaque ARG passed to
2089 for_each_inc_dec. Return zero to continue looking for other
2090 autoinc operations, -1 to skip OP's operands, and any other value
2091 to interrupt the traversal and return that value to the caller of
2092 for_each_inc_dec. */
2093 typedef int (*for_each_inc_dec_fn) (rtx mem, rtx op, rtx dest, rtx src,
2094 rtx srcoff, void *arg);
2095 extern int for_each_inc_dec (rtx *, for_each_inc_dec_fn, void *arg);
2096
2097 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
2098 rtx *, rtx *);
2099 extern int rtx_equal_p_cb (const_rtx, const_rtx,
2100 rtx_equal_p_callback_function);
2101
2102 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
2103 enum machine_mode *);
2104 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
2105 bool, hash_rtx_callback_function);
2106
2107 extern rtx regno_use_in (unsigned int, rtx);
2108 extern int auto_inc_p (const_rtx);
2109 extern int in_expr_list_p (const_rtx, const_rtx);
2110 extern void remove_node_from_expr_list (const_rtx, rtx *);
2111 extern int loc_mentioned_in_p (rtx *, const_rtx);
2112 extern rtx find_first_parameter_load (rtx, rtx);
2113 extern bool keep_with_call_p (const_rtx);
2114 extern bool label_is_jump_target_p (const_rtx, const_rtx);
2115 extern int insn_rtx_cost (rtx, bool);
2116
2117 /* Given an insn and condition, return a canonical description of
2118 the test being made. */
2119 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
2120
2121 /* Given a JUMP_INSN, return a canonical description of the test
2122 being made. */
2123 extern rtx get_condition (rtx, rtx *, int, int);
2124
2125 /* Information about a subreg of a hard register. */
2126 struct subreg_info
2127 {
2128 /* Offset of first hard register involved in the subreg. */
2129 int offset;
2130 /* Number of hard registers involved in the subreg. */
2131 int nregs;
2132 /* Whether this subreg can be represented as a hard reg with the new
2133 mode. */
2134 bool representable_p;
2135 };
2136
2137 extern void subreg_get_info (unsigned int, enum machine_mode,
2138 unsigned int, enum machine_mode,
2139 struct subreg_info *);
2140
2141 /* lists.c */
2142
2143 extern void free_EXPR_LIST_list (rtx *);
2144 extern void free_INSN_LIST_list (rtx *);
2145 extern void free_EXPR_LIST_node (rtx);
2146 extern void free_INSN_LIST_node (rtx);
2147 extern rtx alloc_INSN_LIST (rtx, rtx);
2148 extern rtx copy_INSN_LIST (rtx);
2149 extern rtx concat_INSN_LIST (rtx, rtx);
2150 extern rtx alloc_EXPR_LIST (int, rtx, rtx);
2151 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
2152 extern rtx remove_list_elem (rtx, rtx *);
2153 extern rtx remove_free_INSN_LIST_node (rtx *);
2154 extern rtx remove_free_EXPR_LIST_node (rtx *);
2155
2156
2157 /* reginfo.c */
2158
2159 /* Resize reg info. */
2160 extern bool resize_reg_info (void);
2161 /* Free up register info memory. */
2162 extern void free_reg_info (void);
2163 extern void init_subregs_of_mode (void);
2164 extern void finish_subregs_of_mode (void);
2165
2166 /* recog.c */
2167 extern rtx extract_asm_operands (rtx);
2168 extern int asm_noperands (const_rtx);
2169 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
2170 enum machine_mode *, location_t *);
2171
2172 extern enum reg_class reg_preferred_class (int);
2173 extern enum reg_class reg_alternate_class (int);
2174 extern enum reg_class reg_allocno_class (int);
2175 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
2176 enum reg_class);
2177
2178 extern void split_all_insns (void);
2179 extern unsigned int split_all_insns_noflow (void);
2180
2181 #define MAX_SAVED_CONST_INT 64
2182 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
2183
2184 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
2185 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
2186 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
2187 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
2188 extern GTY(()) rtx const_true_rtx;
2189
2190 extern GTY(()) rtx const_tiny_rtx[4][(int) MAX_MACHINE_MODE];
2191
2192 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
2193 same as VOIDmode. */
2194
2195 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
2196
2197 /* Likewise, for the constants 1 and 2 and -1. */
2198
2199 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
2200 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
2201 #define CONSTM1_RTX(MODE) (const_tiny_rtx[3][(int) (MODE)])
2202
2203 extern GTY(()) rtx pc_rtx;
2204 extern GTY(()) rtx cc0_rtx;
2205 extern GTY(()) rtx ret_rtx;
2206 extern GTY(()) rtx simple_return_rtx;
2207
2208 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
2209 is used to represent the frame pointer. This is because the
2210 hard frame pointer and the automatic variables are separated by an amount
2211 that cannot be determined until after register allocation. We can assume
2212 that in this case ELIMINABLE_REGS will be defined, one action of which
2213 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
2214 #ifndef HARD_FRAME_POINTER_REGNUM
2215 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
2216 #endif
2217
2218 #ifndef HARD_FRAME_POINTER_IS_FRAME_POINTER
2219 #define HARD_FRAME_POINTER_IS_FRAME_POINTER \
2220 (HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM)
2221 #endif
2222
2223 #ifndef HARD_FRAME_POINTER_IS_ARG_POINTER
2224 #define HARD_FRAME_POINTER_IS_ARG_POINTER \
2225 (HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM)
2226 #endif
2227
2228 /* Index labels for global_rtl. */
2229 enum global_rtl_index
2230 {
2231 GR_STACK_POINTER,
2232 GR_FRAME_POINTER,
2233 /* For register elimination to work properly these hard_frame_pointer_rtx,
2234 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2235 the same register. */
2236 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2237 GR_ARG_POINTER = GR_FRAME_POINTER,
2238 #endif
2239 #if HARD_FRAME_POINTER_IS_FRAME_POINTER
2240 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2241 #else
2242 GR_HARD_FRAME_POINTER,
2243 #endif
2244 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2245 #if HARD_FRAME_POINTER_IS_ARG_POINTER
2246 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2247 #else
2248 GR_ARG_POINTER,
2249 #endif
2250 #endif
2251 GR_VIRTUAL_INCOMING_ARGS,
2252 GR_VIRTUAL_STACK_ARGS,
2253 GR_VIRTUAL_STACK_DYNAMIC,
2254 GR_VIRTUAL_OUTGOING_ARGS,
2255 GR_VIRTUAL_CFA,
2256 GR_VIRTUAL_PREFERRED_STACK_BOUNDARY,
2257
2258 GR_MAX
2259 };
2260
2261 /* Target-dependent globals. */
2262 struct GTY(()) target_rtl {
2263 /* All references to the hard registers in global_rtl_index go through
2264 these unique rtl objects. On machines where the frame-pointer and
2265 arg-pointer are the same register, they use the same unique object.
2266
2267 After register allocation, other rtl objects which used to be pseudo-regs
2268 may be clobbered to refer to the frame-pointer register.
2269 But references that were originally to the frame-pointer can be
2270 distinguished from the others because they contain frame_pointer_rtx.
2271
2272 When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
2273 tricky: until register elimination has taken place hard_frame_pointer_rtx
2274 should be used if it is being set, and frame_pointer_rtx otherwise. After
2275 register elimination hard_frame_pointer_rtx should always be used.
2276 On machines where the two registers are same (most) then these are the
2277 same. */
2278 rtx x_global_rtl[GR_MAX];
2279
2280 /* A unique representation of (REG:Pmode PIC_OFFSET_TABLE_REGNUM). */
2281 rtx x_pic_offset_table_rtx;
2282
2283 /* A unique representation of (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM).
2284 This is used to implement __builtin_return_address for some machines;
2285 see for instance the MIPS port. */
2286 rtx x_return_address_pointer_rtx;
2287
2288 /* Commonly used RTL for hard registers. These objects are not
2289 necessarily unique, so we allocate them separately from global_rtl.
2290 They are initialized once per compilation unit, then copied into
2291 regno_reg_rtx at the beginning of each function. */
2292 rtx x_initial_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
2293
2294 /* A sample (mem:M stack_pointer_rtx) rtx for each mode M. */
2295 rtx x_top_of_stack[MAX_MACHINE_MODE];
2296
2297 /* Static hunks of RTL used by the aliasing code; these are treated
2298 as persistent to avoid unnecessary RTL allocations. */
2299 rtx x_static_reg_base_value[FIRST_PSEUDO_REGISTER];
2300
2301 /* The default memory attributes for each mode. */
2302 struct mem_attrs *x_mode_mem_attrs[(int) MAX_MACHINE_MODE];
2303 };
2304
2305 extern GTY(()) struct target_rtl default_target_rtl;
2306 #if SWITCHABLE_TARGET
2307 extern struct target_rtl *this_target_rtl;
2308 #else
2309 #define this_target_rtl (&default_target_rtl)
2310 #endif
2311
2312 #define global_rtl \
2313 (this_target_rtl->x_global_rtl)
2314 #define pic_offset_table_rtx \
2315 (this_target_rtl->x_pic_offset_table_rtx)
2316 #define return_address_pointer_rtx \
2317 (this_target_rtl->x_return_address_pointer_rtx)
2318 #define top_of_stack \
2319 (this_target_rtl->x_top_of_stack)
2320 #define mode_mem_attrs \
2321 (this_target_rtl->x_mode_mem_attrs)
2322
2323 /* All references to certain hard regs, except those created
2324 by allocating pseudo regs into them (when that's possible),
2325 go through these unique rtx objects. */
2326 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
2327 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
2328 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
2329 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
2330
2331 #ifndef GENERATOR_FILE
2332 /* Return the attributes of a MEM rtx. */
2333 static inline struct mem_attrs *
2334 get_mem_attrs (const_rtx x)
2335 {
2336 struct mem_attrs *attrs;
2337
2338 attrs = MEM_ATTRS (x);
2339 if (!attrs)
2340 attrs = mode_mem_attrs[(int) GET_MODE (x)];
2341 return attrs;
2342 }
2343 #endif
2344
2345 /* Include the RTL generation functions. */
2346
2347 #ifndef GENERATOR_FILE
2348 #include "genrtl.h"
2349 #undef gen_rtx_ASM_INPUT
2350 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
2351 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2352 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
2353 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2354 #endif
2355
2356 /* There are some RTL codes that require special attention; the
2357 generation functions included above do the raw handling. If you
2358 add to this list, modify special_rtx in gengenrtl.c as well. */
2359
2360 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2361 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2362 extern rtx gen_raw_REG (enum machine_mode, int);
2363 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2364 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2365 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2366
2367 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
2368
2369 /* Virtual registers are used during RTL generation to refer to locations into
2370 the stack frame when the actual location isn't known until RTL generation
2371 is complete. The routine instantiate_virtual_regs replaces these with
2372 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2373 a constant. */
2374
2375 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
2376
2377 /* This points to the first word of the incoming arguments passed on the stack,
2378 either by the caller or by the callee when pretending it was passed by the
2379 caller. */
2380
2381 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2382
2383 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
2384
2385 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2386 variable on the stack. Otherwise, it points to the first variable on
2387 the stack. */
2388
2389 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
2390
2391 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
2392
2393 /* This points to the location of dynamically-allocated memory on the stack
2394 immediately after the stack pointer has been adjusted by the amount
2395 desired. */
2396
2397 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2398
2399 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
2400
2401 /* This points to the location in the stack at which outgoing arguments should
2402 be written when the stack is pre-pushed (arguments pushed using push
2403 insns always use sp). */
2404
2405 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2406
2407 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
2408
2409 /* This points to the Canonical Frame Address of the function. This
2410 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2411 but is calculated relative to the arg pointer for simplicity; the
2412 frame pointer nor stack pointer are necessarily fixed relative to
2413 the CFA until after reload. */
2414
2415 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
2416
2417 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
2418
2419 #define LAST_VIRTUAL_POINTER_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
2420
2421 /* This is replaced by crtl->preferred_stack_boundary / BITS_PER_UNIT
2422 when finalized. */
2423
2424 #define virtual_preferred_stack_boundary_rtx \
2425 (global_rtl[GR_VIRTUAL_PREFERRED_STACK_BOUNDARY])
2426
2427 #define VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM \
2428 ((FIRST_VIRTUAL_REGISTER) + 5)
2429
2430 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 5)
2431
2432 /* Nonzero if REGNUM is a pointer into the stack frame. */
2433 #define REGNO_PTR_FRAME_P(REGNUM) \
2434 ((REGNUM) == STACK_POINTER_REGNUM \
2435 || (REGNUM) == FRAME_POINTER_REGNUM \
2436 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
2437 || (REGNUM) == ARG_POINTER_REGNUM \
2438 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
2439 && (REGNUM) <= LAST_VIRTUAL_POINTER_REGISTER))
2440
2441 /* REGNUM never really appearing in the INSN stream. */
2442 #define INVALID_REGNUM (~(unsigned int) 0)
2443
2444 /* REGNUM for which no debug information can be generated. */
2445 #define IGNORED_DWARF_REGNUM (INVALID_REGNUM - 1)
2446
2447 extern rtx output_constant_def (tree, int);
2448 extern rtx lookup_constant_def (tree);
2449
2450 /* Nonzero after end of reload pass.
2451 Set to 1 or 0 by reload1.c. */
2452
2453 extern int reload_completed;
2454
2455 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
2456 extern int epilogue_completed;
2457
2458 /* Set to 1 while reload_as_needed is operating.
2459 Required by some machines to handle any generated moves differently. */
2460
2461 extern int reload_in_progress;
2462
2463 /* Set to 1 while in lra. */
2464 extern int lra_in_progress;
2465
2466 /* This macro indicates whether you may create a new
2467 pseudo-register. */
2468
2469 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2470
2471 #ifdef STACK_REGS
2472 /* Nonzero after end of regstack pass.
2473 Set to 1 or 0 by reg-stack.c. */
2474 extern int regstack_completed;
2475 #endif
2476
2477 /* If this is nonzero, we do not bother generating VOLATILE
2478 around volatile memory references, and we are willing to
2479 output indirect addresses. If cse is to follow, we reject
2480 indirect addresses so a useful potential cse is generated;
2481 if it is used only once, instruction combination will produce
2482 the same indirect address eventually. */
2483 extern int cse_not_expected;
2484
2485 /* Translates rtx code to tree code, for those codes needed by
2486 REAL_ARITHMETIC. The function returns an int because the caller may not
2487 know what `enum tree_code' means. */
2488
2489 extern int rtx_to_tree_code (enum rtx_code);
2490
2491 /* In cse.c */
2492 extern int delete_trivially_dead_insns (rtx, int);
2493 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2494 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2495
2496 /* In dse.c */
2497 extern bool check_for_inc_dec (rtx insn);
2498
2499 /* In jump.c */
2500 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2501 extern bool jump_to_label_p (rtx);
2502 extern int condjump_p (const_rtx);
2503 extern int any_condjump_p (const_rtx);
2504 extern int any_uncondjump_p (const_rtx);
2505 extern rtx pc_set (const_rtx);
2506 extern rtx condjump_label (const_rtx);
2507 extern int simplejump_p (const_rtx);
2508 extern int returnjump_p (rtx);
2509 extern int eh_returnjump_p (rtx);
2510 extern int onlyjump_p (const_rtx);
2511 extern int only_sets_cc0_p (const_rtx);
2512 extern int sets_cc0_p (const_rtx);
2513 extern int invert_jump_1 (rtx, rtx);
2514 extern int invert_jump (rtx, rtx, int);
2515 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2516 extern int true_regnum (const_rtx);
2517 extern unsigned int reg_or_subregno (const_rtx);
2518 extern int redirect_jump_1 (rtx, rtx);
2519 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2520 extern int redirect_jump (rtx, rtx, int);
2521 extern void rebuild_jump_labels (rtx);
2522 extern void rebuild_jump_labels_chain (rtx);
2523 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2524 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2525 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2526 const_rtx, const_rtx);
2527 extern void delete_for_peephole (rtx, rtx);
2528 extern int condjump_in_parallel_p (const_rtx);
2529
2530 /* In emit-rtl.c. */
2531 extern int max_reg_num (void);
2532 extern int max_label_num (void);
2533 extern int get_first_label_num (void);
2534 extern void maybe_set_first_label_num (rtx);
2535 extern void delete_insns_since (rtx);
2536 extern void mark_reg_pointer (rtx, int);
2537 extern void mark_user_reg (rtx);
2538 extern void reset_used_flags (rtx);
2539 extern void set_used_flags (rtx);
2540 extern void reorder_insns (rtx, rtx, rtx);
2541 extern void reorder_insns_nobb (rtx, rtx, rtx);
2542 extern int get_max_insn_count (void);
2543 extern int in_sequence_p (void);
2544 extern void init_emit (void);
2545 extern void init_emit_regs (void);
2546 extern void init_emit_once (void);
2547 extern void push_topmost_sequence (void);
2548 extern void pop_topmost_sequence (void);
2549 extern void set_new_first_and_last_insn (rtx, rtx);
2550 extern unsigned int unshare_all_rtl (void);
2551 extern void unshare_all_rtl_again (rtx);
2552 extern void unshare_all_rtl_in_chain (rtx);
2553 extern void verify_rtl_sharing (void);
2554 extern void link_cc0_insns (rtx);
2555 extern void add_insn (rtx);
2556 extern void add_insn_before (rtx, rtx, basic_block);
2557 extern void add_insn_after (rtx, rtx, basic_block);
2558 extern void remove_insn (rtx);
2559 extern rtx emit (rtx);
2560 extern void delete_insn (rtx);
2561 extern rtx entry_of_function (void);
2562 extern void emit_insn_at_entry (rtx);
2563 extern void delete_insn_chain (rtx, rtx, bool);
2564 extern rtx unlink_insn_chain (rtx, rtx);
2565 extern void delete_insn_and_edges (rtx);
2566 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2567 extern rtx gen_const_mem (enum machine_mode, rtx);
2568 extern rtx gen_frame_mem (enum machine_mode, rtx);
2569 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2570 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2571 const_rtx, unsigned int);
2572
2573 /* In combine.c */
2574 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2575 extern rtx remove_death (unsigned int, rtx);
2576 extern void dump_combine_stats (FILE *);
2577 extern void dump_combine_total_stats (FILE *);
2578 extern rtx make_compound_operation (rtx, enum rtx_code);
2579
2580 /* In cfgcleanup.c */
2581 extern void delete_dead_jumptables (void);
2582
2583 /* In sched-rgn.c. */
2584 extern void schedule_insns (void);
2585
2586 /* In sched-ebb.c. */
2587 extern void schedule_ebbs (void);
2588
2589 /* In sel-sched-dump.c. */
2590 extern void sel_sched_fix_param (const char *param, const char *val);
2591
2592 /* In print-rtl.c */
2593 extern const char *print_rtx_head;
2594 extern void debug (const rtx_def &ref);
2595 extern void debug (const rtx_def *ptr);
2596 extern void debug_rtx (const_rtx);
2597 extern void debug_rtx_list (const_rtx, int);
2598 extern void debug_rtx_range (const_rtx, const_rtx);
2599 extern const_rtx debug_rtx_find (const_rtx, int);
2600 extern void print_mem_expr (FILE *, const_tree);
2601 extern void print_rtl (FILE *, const_rtx);
2602 extern void print_simple_rtl (FILE *, const_rtx);
2603 extern int print_rtl_single (FILE *, const_rtx);
2604 extern int print_rtl_single_with_indent (FILE *, const_rtx, int);
2605 extern void print_inline_rtx (FILE *, const_rtx, int);
2606
2607 /* Functions in sched-vis.c. FIXME: Ideally these functions would
2608 not be in sched-vis.c but in rtl.c, because they are not only used
2609 by the scheduler anymore but for all "slim" RTL dumping. */
2610 extern void dump_value_slim (FILE *, const_rtx, int);
2611 extern void dump_insn_slim (FILE *, const_rtx);
2612 extern void dump_rtl_slim (FILE *, const_rtx, const_rtx, int, int);
2613 extern void print_value (pretty_printer *, const_rtx, int);
2614 extern void print_pattern (pretty_printer *, const_rtx, int);
2615 extern void print_insn (pretty_printer *, const_rtx, int);
2616 extern void rtl_dump_bb_for_graph (pretty_printer *, basic_block);
2617 extern const char *str_pattern_slim (const_rtx);
2618
2619 /* In function.c */
2620 extern void reposition_prologue_and_epilogue_notes (void);
2621 extern int prologue_epilogue_contains (const_rtx);
2622 extern int sibcall_epilogue_contains (const_rtx);
2623 extern void update_temp_slot_address (rtx, rtx);
2624 extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
2625 extern void set_return_jump_label (rtx);
2626
2627 /* In stmt.c */
2628 extern void expand_null_return (void);
2629 extern void expand_naked_return (void);
2630 extern void emit_jump (rtx);
2631
2632 /* In expr.c */
2633 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2634 unsigned int, int);
2635 extern HOST_WIDE_INT find_args_size_adjust (rtx);
2636 extern int fixup_args_size_notes (rtx, rtx, int);
2637
2638 /* In cfgrtl.c */
2639 extern void print_rtl_with_bb (FILE *, const_rtx, int);
2640 extern rtx duplicate_insn_chain (rtx, rtx);
2641
2642 /* In expmed.c */
2643 extern void init_expmed (void);
2644 extern void expand_inc (rtx, rtx);
2645 extern void expand_dec (rtx, rtx);
2646
2647 /* In lower-subreg.c */
2648 extern void init_lower_subreg (void);
2649
2650 /* In gcse.c */
2651 extern bool can_copy_p (enum machine_mode);
2652 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2653 extern rtx fis_get_condition (rtx);
2654
2655 /* In ira.c */
2656 #ifdef HARD_CONST
2657 extern HARD_REG_SET eliminable_regset;
2658 #endif
2659 extern void mark_elimination (int, int);
2660
2661 /* In reginfo.c */
2662 extern int reg_classes_intersect_p (reg_class_t, reg_class_t);
2663 extern int reg_class_subset_p (reg_class_t, reg_class_t);
2664 extern void globalize_reg (tree, int);
2665 extern void init_reg_modes_target (void);
2666 extern void init_regs (void);
2667 extern void reinit_regs (void);
2668 extern void init_fake_stack_mems (void);
2669 extern void save_register_info (void);
2670 extern void init_reg_sets (void);
2671 extern void regclass (rtx, int);
2672 extern void reg_scan (rtx, unsigned int);
2673 extern void fix_register (const char *, int, int);
2674 extern bool invalid_mode_change_p (unsigned int, enum reg_class);
2675
2676 /* In reload1.c */
2677 extern int function_invariant_p (const_rtx);
2678
2679 /* In calls.c */
2680 enum libcall_type
2681 {
2682 LCT_NORMAL = 0,
2683 LCT_CONST = 1,
2684 LCT_PURE = 2,
2685 LCT_NORETURN = 3,
2686 LCT_THROW = 4,
2687 LCT_RETURNS_TWICE = 5
2688 };
2689
2690 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2691 ...);
2692 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2693 enum machine_mode, int, ...);
2694
2695 /* In varasm.c */
2696 extern void init_varasm_once (void);
2697
2698 extern rtx make_debug_expr_from_rtl (const_rtx);
2699
2700 /* In read-rtl.c */
2701 extern bool read_rtx (const char *, rtx *);
2702
2703 /* In alias.c */
2704 extern rtx canon_rtx (rtx);
2705 extern int true_dependence (const_rtx, enum machine_mode, const_rtx);
2706 extern rtx get_addr (rtx);
2707 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx,
2708 const_rtx, rtx);
2709 extern int read_dependence (const_rtx, const_rtx);
2710 extern int anti_dependence (const_rtx, const_rtx);
2711 extern int output_dependence (const_rtx, const_rtx);
2712 extern int may_alias_p (const_rtx, const_rtx);
2713 extern void init_alias_target (void);
2714 extern void init_alias_analysis (void);
2715 extern void end_alias_analysis (void);
2716 extern void vt_equate_reg_base_value (const_rtx, const_rtx);
2717 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2718 extern bool memory_must_be_modified_in_insn_p (const_rtx, const_rtx);
2719 extern bool may_be_sp_based_p (rtx);
2720 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2721 extern rtx get_reg_known_value (unsigned int);
2722 extern bool get_reg_known_equiv_p (unsigned int);
2723 extern rtx get_reg_base_value (unsigned int);
2724
2725 #ifdef STACK_REGS
2726 extern int stack_regs_mentioned (const_rtx insn);
2727 #endif
2728
2729 /* In toplev.c */
2730 extern GTY(()) rtx stack_limit_rtx;
2731
2732 /* In predict.c */
2733 extern void invert_br_probabilities (rtx);
2734 extern bool expensive_function_p (int);
2735
2736 /* In var-tracking.c */
2737 extern unsigned int variable_tracking_main (void);
2738
2739 /* In stor-layout.c. */
2740 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2741 rtx *, rtx *);
2742
2743 /* In loop-unswitch.c */
2744 extern rtx reversed_condition (rtx);
2745 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2746
2747 /* In loop-iv.c */
2748 extern rtx canon_condition (rtx);
2749 extern void simplify_using_condition (rtx, rtx *, bitmap);
2750
2751 /* In final.c */
2752 extern unsigned int compute_alignments (void);
2753 extern int asm_str_count (const char *templ);
2754 \f
2755 struct rtl_hooks
2756 {
2757 rtx (*gen_lowpart) (enum machine_mode, rtx);
2758 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2759 rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2760 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2761 rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2762 unsigned int, unsigned int *);
2763 bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2764
2765 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
2766 };
2767
2768 /* Each pass can provide its own. */
2769 extern struct rtl_hooks rtl_hooks;
2770
2771 /* ... but then it has to restore these. */
2772 extern const struct rtl_hooks general_rtl_hooks;
2773
2774 /* Keep this for the nonce. */
2775 #define gen_lowpart rtl_hooks.gen_lowpart
2776
2777 extern void insn_locations_init (void);
2778 extern void insn_locations_finalize (void);
2779 extern void set_curr_insn_location (location_t);
2780 extern location_t curr_insn_location (void);
2781 extern bool optimize_insn_for_size_p (void);
2782 extern bool optimize_insn_for_speed_p (void);
2783
2784 /* rtl-error.c */
2785 extern void _fatal_insn_not_found (const_rtx, const char *, int, const char *)
2786 ATTRIBUTE_NORETURN;
2787 extern void _fatal_insn (const char *, const_rtx, const char *, int, const char *)
2788 ATTRIBUTE_NORETURN;
2789
2790 #define fatal_insn(msgid, insn) \
2791 _fatal_insn (msgid, insn, __FILE__, __LINE__, __FUNCTION__)
2792 #define fatal_insn_not_found(insn) \
2793 _fatal_insn_not_found (insn, __FILE__, __LINE__, __FUNCTION__)
2794
2795
2796
2797 #endif /* ! GCC_RTL_H */
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