2015-05-22 Ed Schonberg <schonberg@adacore.com>
[official-gcc.git] / gcc / rtl.h
blobf9e1b27e4ceff7837156094031b933de0ac1c2ab
1 /* Register Transfer Language (RTL) definitions for GCC
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
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.
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.
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/>. */
20 #ifndef GCC_RTL_H
21 #define GCC_RTL_H
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 "wide-int.h"
32 #include "flags.h"
33 #include "is-a.h"
35 /* Value used by some passes to "recognize" noop moves as valid
36 instructions. */
37 #define NOOP_MOVE_INSN_CODE INT_MAX
39 /* Register Transfer Language EXPRESSIONS CODES */
41 #define RTX_CODE enum rtx_code
42 enum rtx_code {
44 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
45 #include "rtl.def" /* rtl expressions are documented here */
46 #undef DEF_RTL_EXPR
48 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
49 NUM_RTX_CODE.
50 Assumes default enum value assignment. */
52 /* The cast here, saves many elsewhere. */
53 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
55 /* Similar, but since generator files get more entries... */
56 #ifdef GENERATOR_FILE
57 # define NON_GENERATOR_NUM_RTX_CODE ((int) MATCH_OPERAND)
58 #endif
60 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
62 enum rtx_class {
63 /* We check bit 0-1 of some rtx class codes in the predicates below. */
65 /* Bit 0 = comparison if 0, arithmetic is 1
66 Bit 1 = 1 if commutative. */
67 RTX_COMPARE, /* 0 */
68 RTX_COMM_COMPARE,
69 RTX_BIN_ARITH,
70 RTX_COMM_ARITH,
72 /* Must follow the four preceding values. */
73 RTX_UNARY, /* 4 */
75 RTX_EXTRA,
76 RTX_MATCH,
77 RTX_INSN,
79 /* Bit 0 = 1 if constant. */
80 RTX_OBJ, /* 8 */
81 RTX_CONST_OBJ,
83 RTX_TERNARY,
84 RTX_BITFIELD_OPS,
85 RTX_AUTOINC
88 #define RTX_OBJ_MASK (~1)
89 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
90 #define RTX_COMPARE_MASK (~1)
91 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
92 #define RTX_ARITHMETIC_MASK (~1)
93 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
94 #define RTX_BINARY_MASK (~3)
95 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
96 #define RTX_COMMUTATIVE_MASK (~2)
97 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
98 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
100 extern const unsigned char rtx_length[NUM_RTX_CODE];
101 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
103 extern const char * const rtx_name[NUM_RTX_CODE];
104 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
106 extern const char * const rtx_format[NUM_RTX_CODE];
107 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
109 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
110 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
112 /* True if CODE is part of the insn chain (i.e. has INSN_UID, PREV_INSN
113 and NEXT_INSN fields). */
114 #define INSN_CHAIN_CODE_P(CODE) IN_RANGE (CODE, DEBUG_INSN, NOTE)
116 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
117 extern const unsigned char rtx_next[NUM_RTX_CODE];
119 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
120 relative to which the offsets are calculated, as explained in rtl.def. */
121 struct addr_diff_vec_flags
123 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
124 unsigned min_align: 8;
125 /* Flags: */
126 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
127 unsigned min_after_vec: 1; /* minimum address target label is
128 after the ADDR_DIFF_VEC. */
129 unsigned max_after_vec: 1; /* maximum address target label is
130 after the ADDR_DIFF_VEC. */
131 unsigned min_after_base: 1; /* minimum address target label is
132 after BASE. */
133 unsigned max_after_base: 1; /* maximum address target label is
134 after BASE. */
135 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
136 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
137 unsigned : 2;
138 unsigned scale : 8;
141 /* Structure used to describe the attributes of a MEM. These are hashed
142 so MEMs that the same attributes share a data structure. This means
143 they cannot be modified in place. */
144 struct GTY(()) mem_attrs
146 /* The expression that the MEM accesses, or null if not known.
147 This expression might be larger than the memory reference itself.
148 (In other words, the MEM might access only part of the object.) */
149 tree expr;
151 /* The offset of the memory reference from the start of EXPR.
152 Only valid if OFFSET_KNOWN_P. */
153 HOST_WIDE_INT offset;
155 /* The size of the memory reference in bytes. Only valid if
156 SIZE_KNOWN_P. */
157 HOST_WIDE_INT size;
159 /* The alias set of the memory reference. */
160 alias_set_type alias;
162 /* The alignment of the reference in bits. Always a multiple of
163 BITS_PER_UNIT. Note that EXPR may have a stricter alignment
164 than the memory reference itself. */
165 unsigned int align;
167 /* The address space that the memory reference uses. */
168 unsigned char addrspace;
170 /* True if OFFSET is known. */
171 bool offset_known_p;
173 /* True if SIZE is known. */
174 bool size_known_p;
177 /* Structure used to describe the attributes of a REG in similar way as
178 mem_attrs does for MEM above. Note that the OFFSET field is calculated
179 in the same way as for mem_attrs, rather than in the same way as a
180 SUBREG_BYTE. For example, if a big-endian target stores a byte
181 object in the low part of a 4-byte register, the OFFSET field
182 will be -3 rather than 0. */
184 struct GTY((for_user)) reg_attrs {
185 tree decl; /* decl corresponding to REG. */
186 HOST_WIDE_INT offset; /* Offset from start of DECL. */
189 /* Common union for an element of an rtx. */
191 union rtunion
193 int rt_int;
194 unsigned int rt_uint;
195 const char *rt_str;
196 rtx rt_rtx;
197 rtvec rt_rtvec;
198 machine_mode rt_type;
199 addr_diff_vec_flags rt_addr_diff_vec_flags;
200 struct cselib_val *rt_cselib;
201 tree rt_tree;
202 basic_block rt_bb;
203 mem_attrs *rt_mem;
204 struct constant_descriptor_rtx *rt_constant;
205 struct dw_cfi_node *rt_cfi;
208 /* Describes the properties of a REG. */
209 struct GTY(()) reg_info {
210 /* The value of REGNO. */
211 unsigned int regno;
213 /* The value of REG_NREGS. */
214 unsigned int nregs : 8;
215 unsigned int unused : 24;
217 /* The value of REG_ATTRS. */
218 reg_attrs *attrs;
221 /* This structure remembers the position of a SYMBOL_REF within an
222 object_block structure. A SYMBOL_REF only provides this information
223 if SYMBOL_REF_HAS_BLOCK_INFO_P is true. */
224 struct GTY(()) block_symbol {
225 /* The usual SYMBOL_REF fields. */
226 rtunion GTY ((skip)) fld[2];
228 /* The block that contains this object. */
229 struct object_block *block;
231 /* The offset of this object from the start of its block. It is negative
232 if the symbol has not yet been assigned an offset. */
233 HOST_WIDE_INT offset;
236 /* Describes a group of objects that are to be placed together in such
237 a way that their relative positions are known. */
238 struct GTY((for_user)) object_block {
239 /* The section in which these objects should be placed. */
240 section *sect;
242 /* The alignment of the first object, measured in bits. */
243 unsigned int alignment;
245 /* The total size of the objects, measured in bytes. */
246 HOST_WIDE_INT size;
248 /* The SYMBOL_REFs for each object. The vector is sorted in
249 order of increasing offset and the following conditions will
250 hold for each element X:
252 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
253 !SYMBOL_REF_ANCHOR_P (X)
254 SYMBOL_REF_BLOCK (X) == [address of this structure]
255 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
256 vec<rtx, va_gc> *objects;
258 /* All the anchor SYMBOL_REFs used to address these objects, sorted
259 in order of increasing offset, and then increasing TLS model.
260 The following conditions will hold for each element X in this vector:
262 SYMBOL_REF_HAS_BLOCK_INFO_P (X)
263 SYMBOL_REF_ANCHOR_P (X)
264 SYMBOL_REF_BLOCK (X) == [address of this structure]
265 SYMBOL_REF_BLOCK_OFFSET (X) >= 0. */
266 vec<rtx, va_gc> *anchors;
269 struct GTY((variable_size)) hwivec_def {
270 HOST_WIDE_INT elem[1];
273 /* Number of elements of the HWIVEC if RTX is a CONST_WIDE_INT. */
274 #define CWI_GET_NUM_ELEM(RTX) \
275 ((int)RTL_FLAG_CHECK1("CWI_GET_NUM_ELEM", (RTX), CONST_WIDE_INT)->u2.num_elem)
276 #define CWI_PUT_NUM_ELEM(RTX, NUM) \
277 (RTL_FLAG_CHECK1("CWI_PUT_NUM_ELEM", (RTX), CONST_WIDE_INT)->u2.num_elem = (NUM))
279 /* RTL expression ("rtx"). */
281 /* The GTY "desc" and "tag" options below are a kludge: we need a desc
282 field for for gengtype to recognize that inheritance is occurring,
283 so that all subclasses are redirected to the traversal hook for the
284 base class.
285 However, all of the fields are in the base class, and special-casing
286 is at work. Hence we use desc and tag of 0, generating a switch
287 statement of the form:
288 switch (0)
290 case 0: // all the work happens here
292 in order to work with the existing special-casing in gengtype. */
294 struct GTY((desc("0"), tag("0"),
295 chain_next ("RTX_NEXT (&%h)"),
296 chain_prev ("RTX_PREV (&%h)"))) rtx_def {
297 /* The kind of expression this is. */
298 ENUM_BITFIELD(rtx_code) code: 16;
300 /* The kind of value the expression has. */
301 ENUM_BITFIELD(machine_mode) mode : 8;
303 /* 1 in a MEM if we should keep the alias set for this mem unchanged
304 when we access a component.
305 1 in a JUMP_INSN if it is a crossing jump.
306 1 in a CALL_INSN if it is a sibling call.
307 1 in a SET that is for a return.
308 In a CODE_LABEL, part of the two-bit alternate entry field.
309 1 in a CONCAT is VAL_EXPR_IS_COPIED in var-tracking.c.
310 1 in a VALUE is SP_BASED_VALUE_P in cselib.c.
311 1 in a SUBREG generated by LRA for reload insns.
312 1 in a CALL for calls instrumented by Pointer Bounds Checker. */
313 unsigned int jump : 1;
314 /* In a CODE_LABEL, part of the two-bit alternate entry field.
315 1 in a MEM if it cannot trap.
316 1 in a CALL_INSN logically equivalent to
317 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
318 unsigned int call : 1;
319 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
320 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
321 1 in a SYMBOL_REF if it addresses something in the per-function
322 constants pool.
323 1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
324 1 in a NOTE, or EXPR_LIST for a const call.
325 1 in a JUMP_INSN of an annulling branch.
326 1 in a CONCAT is VAL_EXPR_IS_CLOBBERED in var-tracking.c.
327 1 in a preserved VALUE is PRESERVED_VALUE_P in cselib.c.
328 1 in a clobber temporarily created for LRA. */
329 unsigned int unchanging : 1;
330 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
331 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
332 if it has been deleted.
333 1 in a REG expression if corresponds to a variable declared by the user,
334 0 for an internally generated temporary.
335 1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
336 1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
337 non-local label.
338 In a SYMBOL_REF, this flag is used for machine-specific purposes.
339 In a PREFETCH, this flag indicates that it should be considered a scheduling
340 barrier.
341 1 in a CONCAT is VAL_NEEDS_RESOLUTION in var-tracking.c. */
342 unsigned int volatil : 1;
343 /* 1 in a REG if the register is used only in exit code a loop.
344 1 in a SUBREG expression if was generated from a variable with a
345 promoted mode.
346 1 in a CODE_LABEL if the label is used for nonlocal gotos
347 and must not be deleted even if its count is zero.
348 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
349 together with the preceding insn. Valid only within sched.
350 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
351 from the target of a branch. Valid from reorg until end of compilation;
352 cleared before used.
354 The name of the field is historical. It used to be used in MEMs
355 to record whether the MEM accessed part of a structure. */
356 unsigned int in_struct : 1;
357 /* At the end of RTL generation, 1 if this rtx is used. This is used for
358 copying shared structure. See `unshare_all_rtl'.
359 In a REG, this is not needed for that purpose, and used instead
360 in `leaf_renumber_regs_insn'.
361 1 in a SYMBOL_REF, means that emit_library_call
362 has used it as the function.
363 1 in a CONCAT is VAL_HOLDS_TRACK_EXPR in var-tracking.c.
364 1 in a VALUE or DEBUG_EXPR is VALUE_RECURSED_INTO in var-tracking.c. */
365 unsigned int used : 1;
366 /* 1 in an INSN or a SET if this rtx is related to the call frame,
367 either changing how we compute the frame address or saving and
368 restoring registers in the prologue and epilogue.
369 1 in a REG or MEM if it is a pointer.
370 1 in a SYMBOL_REF if it addresses something in the per-function
371 constant string pool.
372 1 in a VALUE is VALUE_CHANGED in var-tracking.c. */
373 unsigned frame_related : 1;
374 /* 1 in a REG or PARALLEL that is the current function's return value.
375 1 in a SYMBOL_REF for a weak symbol.
376 1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P.
377 1 in a CONCAT is VAL_EXPR_HAS_REVERSE in var-tracking.c.
378 1 in a VALUE or DEBUG_EXPR is NO_LOC_P in var-tracking.c. */
379 unsigned return_val : 1;
381 union {
382 /* The final union field is aligned to 64 bits on LP64 hosts,
383 giving a 32-bit gap after the fields above. We optimize the
384 layout for that case and use the gap for extra code-specific
385 information. */
387 /* The ORIGINAL_REGNO of a REG. */
388 unsigned int original_regno;
390 /* The INSN_UID of an RTX_INSN-class code. */
391 int insn_uid;
393 /* The SYMBOL_REF_FLAGS of a SYMBOL_REF. */
394 unsigned int symbol_ref_flags;
396 /* The PAT_VAR_LOCATION_STATUS of a VAR_LOCATION. */
397 enum var_init_status var_location_status;
399 /* In a CONST_WIDE_INT (aka hwivec_def), this is the number of
400 HOST_WIDE_INTs in the hwivec_def. */
401 unsigned int num_elem;
402 } GTY ((skip)) u2;
404 /* The first element of the operands of this rtx.
405 The number of operands and their types are controlled
406 by the `code' field, according to rtl.def. */
407 union u {
408 rtunion fld[1];
409 HOST_WIDE_INT hwint[1];
410 struct reg_info reg;
411 struct block_symbol block_sym;
412 struct real_value rv;
413 struct fixed_value fv;
414 struct hwivec_def hwiv;
415 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
418 /* A node for constructing singly-linked lists of rtx. */
420 class GTY(()) rtx_expr_list : public rtx_def
422 /* No extra fields, but adds invariant: (GET_CODE (X) == EXPR_LIST). */
424 public:
425 /* Get next in list. */
426 rtx_expr_list *next () const;
428 /* Get at the underlying rtx. */
429 rtx element () const;
432 template <>
433 template <>
434 inline bool
435 is_a_helper <rtx_expr_list *>::test (rtx rt)
437 return rt->code == EXPR_LIST;
440 class GTY(()) rtx_insn_list : public rtx_def
442 /* No extra fields, but adds invariant: (GET_CODE (X) == INSN_LIST).
444 This is an instance of:
446 DEF_RTL_EXPR(INSN_LIST, "insn_list", "ue", RTX_EXTRA)
448 i.e. a node for constructing singly-linked lists of rtx_insn *, where
449 the list is "external" to the insn (as opposed to the doubly-linked
450 list embedded within rtx_insn itself). */
452 public:
453 /* Get next in list. */
454 rtx_insn_list *next () const;
456 /* Get at the underlying instruction. */
457 rtx_insn *insn () const;
461 template <>
462 template <>
463 inline bool
464 is_a_helper <rtx_insn_list *>::test (rtx rt)
466 return rt->code == INSN_LIST;
469 /* A node with invariant GET_CODE (X) == SEQUENCE i.e. a vector of rtx,
470 typically (but not always) of rtx_insn *, used in the late passes. */
472 class GTY(()) rtx_sequence : public rtx_def
474 /* No extra fields, but adds invariant: (GET_CODE (X) == SEQUENCE). */
476 public:
477 /* Get number of elements in sequence. */
478 int len () const;
480 /* Get i-th element of the sequence. */
481 rtx element (int index) const;
483 /* Get i-th element of the sequence, with a checked cast to
484 rtx_insn *. */
485 rtx_insn *insn (int index) const;
488 template <>
489 template <>
490 inline bool
491 is_a_helper <rtx_sequence *>::test (rtx rt)
493 return rt->code == SEQUENCE;
496 template <>
497 template <>
498 inline bool
499 is_a_helper <const rtx_sequence *>::test (const_rtx rt)
501 return rt->code == SEQUENCE;
504 class GTY(()) rtx_insn : public rtx_def
506 public:
507 /* No extra fields, but adds the invariant:
509 (INSN_P (X)
510 || NOTE_P (X)
511 || JUMP_TABLE_DATA_P (X)
512 || BARRIER_P (X)
513 || LABEL_P (X))
515 i.e. that we must be able to use the following:
516 INSN_UID ()
517 NEXT_INSN ()
518 PREV_INSN ()
519 i.e. we have an rtx that has an INSN_UID field and can be part of
520 a linked list of insns.
523 /* Returns true if this insn has been deleted. */
525 bool deleted () const { return volatil; }
527 /* Mark this insn as deleted. */
529 void set_deleted () { volatil = true; }
531 /* Mark this insn as not deleted. */
533 void set_undeleted () { volatil = false; }
536 /* Subclasses of rtx_insn. */
538 class GTY(()) rtx_debug_insn : public rtx_insn
540 /* No extra fields, but adds the invariant:
541 DEBUG_INSN_P (X) aka (GET_CODE (X) == DEBUG_INSN)
542 i.e. an annotation for tracking variable assignments.
544 This is an instance of:
545 DEF_RTL_EXPR(DEBUG_INSN, "debug_insn", "uuBeiie", RTX_INSN)
546 from rtl.def. */
549 class GTY(()) rtx_nonjump_insn : public rtx_insn
551 /* No extra fields, but adds the invariant:
552 NONJUMP_INSN_P (X) aka (GET_CODE (X) == INSN)
553 i.e an instruction that cannot jump.
555 This is an instance of:
556 DEF_RTL_EXPR(INSN, "insn", "uuBeiie", RTX_INSN)
557 from rtl.def. */
560 class GTY(()) rtx_jump_insn : public rtx_insn
562 public:
563 /* No extra fields, but adds the invariant:
564 JUMP_P (X) aka (GET_CODE (X) == JUMP_INSN)
565 i.e. an instruction that can possibly jump.
567 This is an instance of:
568 DEF_RTL_EXPR(JUMP_INSN, "jump_insn", "uuBeiie0", RTX_INSN)
569 from rtl.def. */
571 /* Returns jump target of this instruction. The returned value is not
572 necessarily a code label: it may also be a RETURN or SIMPLE_RETURN
573 expression. Also, when the code label is marked "deleted", it is
574 replaced by a NOTE. In some cases the value is NULL_RTX. */
576 inline rtx jump_label () const;
578 /* Returns jump target cast to rtx_code_label *. */
580 inline rtx_code_label *jump_target () const;
582 /* Set jump target. */
584 inline void set_jump_target (rtx_code_label *);
587 class GTY(()) rtx_call_insn : public rtx_insn
589 /* No extra fields, but adds the invariant:
590 CALL_P (X) aka (GET_CODE (X) == CALL_INSN)
591 i.e. an instruction that can possibly call a subroutine
592 but which will not change which instruction comes next
593 in the current function.
595 This is an instance of:
596 DEF_RTL_EXPR(CALL_INSN, "call_insn", "uuBeiiee", RTX_INSN)
597 from rtl.def. */
600 class GTY(()) rtx_jump_table_data : public rtx_insn
602 /* No extra fields, but adds the invariant:
603 JUMP_TABLE_DATA_P (X) aka (GET_CODE (INSN) == JUMP_TABLE_DATA)
604 i.e. a data for a jump table, considered an instruction for
605 historical reasons.
607 This is an instance of:
608 DEF_RTL_EXPR(JUMP_TABLE_DATA, "jump_table_data", "uuBe0000", RTX_INSN)
609 from rtl.def. */
611 public:
613 /* This can be either:
615 (a) a table of absolute jumps, in which case PATTERN (this) is an
616 ADDR_VEC with arg 0 a vector of labels, or
618 (b) a table of relative jumps (e.g. for -fPIC), in which case
619 PATTERN (this) is an ADDR_DIFF_VEC, with arg 0 a LABEL_REF and
620 arg 1 the vector of labels.
622 This method gets the underlying vec. */
624 inline rtvec get_labels () const;
627 class GTY(()) rtx_barrier : public rtx_insn
629 /* No extra fields, but adds the invariant:
630 BARRIER_P (X) aka (GET_CODE (X) == BARRIER)
631 i.e. a marker that indicates that control will not flow through.
633 This is an instance of:
634 DEF_RTL_EXPR(BARRIER, "barrier", "uu00000", RTX_EXTRA)
635 from rtl.def. */
638 class GTY(()) rtx_code_label : public rtx_insn
640 /* No extra fields, but adds the invariant:
641 LABEL_P (X) aka (GET_CODE (X) == CODE_LABEL)
642 i.e. a label in the assembler.
644 This is an instance of:
645 DEF_RTL_EXPR(CODE_LABEL, "code_label", "uuB00is", RTX_EXTRA)
646 from rtl.def. */
649 class GTY(()) rtx_note : public rtx_insn
651 /* No extra fields, but adds the invariant:
652 NOTE_P(X) aka (GET_CODE (X) == NOTE)
653 i.e. a note about the corresponding source code.
655 This is an instance of:
656 DEF_RTL_EXPR(NOTE, "note", "uuB0ni", RTX_EXTRA)
657 from rtl.def. */
660 /* The size in bytes of an rtx header (code, mode and flags). */
661 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
663 /* The size in bytes of an rtx with code CODE. */
664 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
666 #define NULL_RTX (rtx) 0
668 /* The "next" and "previous" RTX, relative to this one. */
670 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \
671 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
673 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
675 #define RTX_PREV(X) ((INSN_P (X) \
676 || NOTE_P (X) \
677 || JUMP_TABLE_DATA_P (X) \
678 || BARRIER_P (X) \
679 || LABEL_P (X)) \
680 && PREV_INSN (as_a <rtx_insn *> (X)) != NULL \
681 && NEXT_INSN (PREV_INSN (as_a <rtx_insn *> (X))) == X \
682 ? PREV_INSN (as_a <rtx_insn *> (X)) : NULL)
684 /* Define macros to access the `code' field of the rtx. */
686 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code)
687 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
689 #define GET_MODE(RTX) ((machine_mode) (RTX)->mode)
690 #define PUT_MODE_RAW(RTX, MODE) ((RTX)->mode = (MODE))
692 /* RTL vector. These appear inside RTX's when there is a need
693 for a variable number of things. The principle use is inside
694 PARALLEL expressions. */
696 struct GTY(()) rtvec_def {
697 int num_elem; /* number of elements */
698 rtx GTY ((length ("%h.num_elem"))) elem[1];
701 #define NULL_RTVEC (rtvec) 0
703 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
704 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
706 /* Predicate yielding nonzero iff X is an rtx for a register. */
707 #define REG_P(X) (GET_CODE (X) == REG)
709 /* Predicate yielding nonzero iff X is an rtx for a memory location. */
710 #define MEM_P(X) (GET_CODE (X) == MEM)
712 #if TARGET_SUPPORTS_WIDE_INT
714 /* Match CONST_*s that can represent compile-time constant integers. */
715 #define CASE_CONST_SCALAR_INT \
716 case CONST_INT: \
717 case CONST_WIDE_INT
719 /* Match CONST_*s for which pointer equality corresponds to value
720 equality. */
721 #define CASE_CONST_UNIQUE \
722 case CONST_INT: \
723 case CONST_WIDE_INT: \
724 case CONST_DOUBLE: \
725 case CONST_FIXED
727 /* Match all CONST_* rtxes. */
728 #define CASE_CONST_ANY \
729 case CONST_INT: \
730 case CONST_WIDE_INT: \
731 case CONST_DOUBLE: \
732 case CONST_FIXED: \
733 case CONST_VECTOR
735 #else
737 /* Match CONST_*s that can represent compile-time constant integers. */
738 #define CASE_CONST_SCALAR_INT \
739 case CONST_INT: \
740 case CONST_DOUBLE
742 /* Match CONST_*s for which pointer equality corresponds to value
743 equality. */
744 #define CASE_CONST_UNIQUE \
745 case CONST_INT: \
746 case CONST_DOUBLE: \
747 case CONST_FIXED
749 /* Match all CONST_* rtxes. */
750 #define CASE_CONST_ANY \
751 case CONST_INT: \
752 case CONST_DOUBLE: \
753 case CONST_FIXED: \
754 case CONST_VECTOR
755 #endif
757 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
758 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
760 /* Predicate yielding nonzero iff X is an rtx for a constant integer. */
761 #define CONST_WIDE_INT_P(X) (GET_CODE (X) == CONST_WIDE_INT)
763 /* Predicate yielding nonzero iff X is an rtx for a constant fixed-point. */
764 #define CONST_FIXED_P(X) (GET_CODE (X) == CONST_FIXED)
766 /* Predicate yielding true iff X is an rtx for a double-int
767 or floating point constant. */
768 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
770 /* Predicate yielding true iff X is an rtx for a double-int. */
771 #define CONST_DOUBLE_AS_INT_P(X) \
772 (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == VOIDmode)
774 /* Predicate yielding true iff X is an rtx for a integer const. */
775 #if TARGET_SUPPORTS_WIDE_INT
776 #define CONST_SCALAR_INT_P(X) \
777 (CONST_INT_P (X) || CONST_WIDE_INT_P (X))
778 #else
779 #define CONST_SCALAR_INT_P(X) \
780 (CONST_INT_P (X) || CONST_DOUBLE_AS_INT_P (X))
781 #endif
783 /* Predicate yielding true iff X is an rtx for a double-int. */
784 #define CONST_DOUBLE_AS_FLOAT_P(X) \
785 (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) != VOIDmode)
787 /* Predicate yielding nonzero iff X is a label insn. */
788 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
790 /* Predicate yielding nonzero iff X is a jump insn. */
791 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
793 /* Predicate yielding nonzero iff X is a call insn. */
794 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
796 /* Predicate yielding nonzero iff X is an insn that cannot jump. */
797 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
799 /* Predicate yielding nonzero iff X is a debug note/insn. */
800 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
802 /* Predicate yielding nonzero iff X is an insn that is not a debug insn. */
803 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
805 /* Nonzero if DEBUG_INSN_P may possibly hold. */
806 #define MAY_HAVE_DEBUG_INSNS (flag_var_tracking_assignments)
808 /* Predicate yielding nonzero iff X is a real insn. */
809 #define INSN_P(X) \
810 (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
812 /* Predicate yielding nonzero iff X is a note insn. */
813 #define NOTE_P(X) (GET_CODE (X) == NOTE)
815 /* Predicate yielding nonzero iff X is a barrier insn. */
816 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
818 /* Predicate yielding nonzero iff X is a data for a jump table. */
819 #define JUMP_TABLE_DATA_P(INSN) (GET_CODE (INSN) == JUMP_TABLE_DATA)
821 /* Predicate yielding nonzero iff RTX is a subreg. */
822 #define SUBREG_P(RTX) (GET_CODE (RTX) == SUBREG)
824 template <>
825 template <>
826 inline bool
827 is_a_helper <rtx_insn *>::test (rtx rt)
829 return (INSN_P (rt)
830 || NOTE_P (rt)
831 || JUMP_TABLE_DATA_P (rt)
832 || BARRIER_P (rt)
833 || LABEL_P (rt));
836 template <>
837 template <>
838 inline bool
839 is_a_helper <const rtx_insn *>::test (const_rtx rt)
841 return (INSN_P (rt)
842 || NOTE_P (rt)
843 || JUMP_TABLE_DATA_P (rt)
844 || BARRIER_P (rt)
845 || LABEL_P (rt));
848 template <>
849 template <>
850 inline bool
851 is_a_helper <rtx_debug_insn *>::test (rtx rt)
853 return DEBUG_INSN_P (rt);
856 template <>
857 template <>
858 inline bool
859 is_a_helper <rtx_nonjump_insn *>::test (rtx rt)
861 return NONJUMP_INSN_P (rt);
864 template <>
865 template <>
866 inline bool
867 is_a_helper <rtx_jump_insn *>::test (rtx rt)
869 return JUMP_P (rt);
872 template <>
873 template <>
874 inline bool
875 is_a_helper <rtx_jump_insn *>::test (rtx_insn *insn)
877 return JUMP_P (insn);
880 template <>
881 template <>
882 inline bool
883 is_a_helper <rtx_call_insn *>::test (rtx rt)
885 return CALL_P (rt);
888 template <>
889 template <>
890 inline bool
891 is_a_helper <rtx_call_insn *>::test (rtx_insn *insn)
893 return CALL_P (insn);
896 template <>
897 template <>
898 inline bool
899 is_a_helper <rtx_jump_table_data *>::test (rtx rt)
901 return JUMP_TABLE_DATA_P (rt);
904 template <>
905 template <>
906 inline bool
907 is_a_helper <rtx_jump_table_data *>::test (rtx_insn *insn)
909 return JUMP_TABLE_DATA_P (insn);
912 template <>
913 template <>
914 inline bool
915 is_a_helper <rtx_barrier *>::test (rtx rt)
917 return BARRIER_P (rt);
920 template <>
921 template <>
922 inline bool
923 is_a_helper <rtx_code_label *>::test (rtx rt)
925 return LABEL_P (rt);
928 template <>
929 template <>
930 inline bool
931 is_a_helper <rtx_code_label *>::test (rtx_insn *insn)
933 return LABEL_P (insn);
936 template <>
937 template <>
938 inline bool
939 is_a_helper <rtx_note *>::test (rtx rt)
941 return NOTE_P (rt);
944 template <>
945 template <>
946 inline bool
947 is_a_helper <rtx_note *>::test (rtx_insn *insn)
949 return NOTE_P (insn);
952 /* Predicate yielding nonzero iff X is a return or simple_return. */
953 #define ANY_RETURN_P(X) \
954 (GET_CODE (X) == RETURN || GET_CODE (X) == SIMPLE_RETURN)
956 /* 1 if X is a unary operator. */
958 #define UNARY_P(X) \
959 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
961 /* 1 if X is a binary operator. */
963 #define BINARY_P(X) \
964 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
966 /* 1 if X is an arithmetic operator. */
968 #define ARITHMETIC_P(X) \
969 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \
970 == RTX_ARITHMETIC_RESULT)
972 /* 1 if X is an arithmetic operator. */
974 #define COMMUTATIVE_ARITH_P(X) \
975 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
977 /* 1 if X is a commutative arithmetic operator or a comparison operator.
978 These two are sometimes selected together because it is possible to
979 swap the two operands. */
981 #define SWAPPABLE_OPERANDS_P(X) \
982 ((1 << GET_RTX_CLASS (GET_CODE (X))) \
983 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \
984 | (1 << RTX_COMPARE)))
986 /* 1 if X is a non-commutative operator. */
988 #define NON_COMMUTATIVE_P(X) \
989 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
990 == RTX_NON_COMMUTATIVE_RESULT)
992 /* 1 if X is a commutative operator on integers. */
994 #define COMMUTATIVE_P(X) \
995 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \
996 == RTX_COMMUTATIVE_RESULT)
998 /* 1 if X is a relational operator. */
1000 #define COMPARISON_P(X) \
1001 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
1003 /* 1 if X is a constant value that is an integer. */
1005 #define CONSTANT_P(X) \
1006 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
1008 /* 1 if X can be used to represent an object. */
1009 #define OBJECT_P(X) \
1010 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
1012 /* General accessor macros for accessing the fields of an rtx. */
1014 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
1015 /* The bit with a star outside the statement expr and an & inside is
1016 so that N can be evaluated only once. */
1017 #define RTL_CHECK1(RTX, N, C1) __extension__ \
1018 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
1019 const enum rtx_code _code = GET_CODE (_rtx); \
1020 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
1021 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
1022 __FUNCTION__); \
1023 if (GET_RTX_FORMAT (_code)[_n] != C1) \
1024 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \
1025 __FUNCTION__); \
1026 &_rtx->u.fld[_n]; }))
1028 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \
1029 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
1030 const enum rtx_code _code = GET_CODE (_rtx); \
1031 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
1032 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
1033 __FUNCTION__); \
1034 if (GET_RTX_FORMAT (_code)[_n] != C1 \
1035 && GET_RTX_FORMAT (_code)[_n] != C2) \
1036 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \
1037 __FUNCTION__); \
1038 &_rtx->u.fld[_n]; }))
1040 #define RTL_CHECKC1(RTX, N, C) __extension__ \
1041 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
1042 if (GET_CODE (_rtx) != (C)) \
1043 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
1044 __FUNCTION__); \
1045 &_rtx->u.fld[_n]; }))
1047 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \
1048 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
1049 const enum rtx_code _code = GET_CODE (_rtx); \
1050 if (_code != (C1) && _code != (C2)) \
1051 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \
1052 __FUNCTION__); \
1053 &_rtx->u.fld[_n]; }))
1055 #define RTVEC_ELT(RTVEC, I) __extension__ \
1056 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I); \
1057 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \
1058 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \
1059 __FUNCTION__); \
1060 &_rtvec->elem[_i]; }))
1062 #define XWINT(RTX, N) __extension__ \
1063 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N); \
1064 const enum rtx_code _code = GET_CODE (_rtx); \
1065 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \
1066 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \
1067 __FUNCTION__); \
1068 if (GET_RTX_FORMAT (_code)[_n] != 'w') \
1069 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \
1070 __FUNCTION__); \
1071 &_rtx->u.hwint[_n]; }))
1073 #define CWI_ELT(RTX, I) __extension__ \
1074 (*({ __typeof (RTX) const _cwi = (RTX); \
1075 int _max = CWI_GET_NUM_ELEM (_cwi); \
1076 const int _i = (I); \
1077 if (_i < 0 || _i >= _max) \
1078 cwi_check_failed_bounds (_cwi, _i, __FILE__, __LINE__, \
1079 __FUNCTION__); \
1080 &_cwi->u.hwiv.elem[_i]; }))
1082 #define XCWINT(RTX, N, C) __extension__ \
1083 (*({ __typeof (RTX) const _rtx = (RTX); \
1084 if (GET_CODE (_rtx) != (C)) \
1085 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \
1086 __FUNCTION__); \
1087 &_rtx->u.hwint[N]; }))
1089 #define XCMWINT(RTX, N, C, M) __extension__ \
1090 (*({ __typeof (RTX) const _rtx = (RTX); \
1091 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \
1092 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \
1093 __LINE__, __FUNCTION__); \
1094 &_rtx->u.hwint[N]; }))
1096 #define XCNMPRV(RTX, C, M) __extension__ \
1097 ({ __typeof (RTX) const _rtx = (RTX); \
1098 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
1099 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
1100 __LINE__, __FUNCTION__); \
1101 &_rtx->u.rv; })
1103 #define XCNMPFV(RTX, C, M) __extension__ \
1104 ({ __typeof (RTX) const _rtx = (RTX); \
1105 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \
1106 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \
1107 __LINE__, __FUNCTION__); \
1108 &_rtx->u.fv; })
1110 #define REG_CHECK(RTX) __extension__ \
1111 ({ __typeof (RTX) const _rtx = (RTX); \
1112 if (GET_CODE (_rtx) != REG) \
1113 rtl_check_failed_code1 (_rtx, REG, __FILE__, __LINE__, \
1114 __FUNCTION__); \
1115 &_rtx->u.reg; })
1117 #define BLOCK_SYMBOL_CHECK(RTX) __extension__ \
1118 ({ __typeof (RTX) const _symbol = (RTX); \
1119 const unsigned int flags = SYMBOL_REF_FLAGS (_symbol); \
1120 if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0) \
1121 rtl_check_failed_block_symbol (__FILE__, __LINE__, \
1122 __FUNCTION__); \
1123 &_symbol->u.block_sym; })
1125 #define HWIVEC_CHECK(RTX,C) __extension__ \
1126 ({ __typeof (RTX) const _symbol = (RTX); \
1127 RTL_CHECKC1 (_symbol, 0, C); \
1128 &_symbol->u.hwiv; })
1130 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
1131 const char *)
1132 ATTRIBUTE_NORETURN;
1133 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
1134 const char *)
1135 ATTRIBUTE_NORETURN;
1136 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
1137 int, const char *)
1138 ATTRIBUTE_NORETURN;
1139 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
1140 int, const char *)
1141 ATTRIBUTE_NORETURN;
1142 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
1143 const char *, int, const char *)
1144 ATTRIBUTE_NORETURN;
1145 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, machine_mode,
1146 bool, const char *, int, const char *)
1147 ATTRIBUTE_NORETURN;
1148 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
1149 ATTRIBUTE_NORETURN;
1150 extern void cwi_check_failed_bounds (const_rtx, int, const char *, int,
1151 const char *)
1152 ATTRIBUTE_NORETURN;
1153 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
1154 const char *)
1155 ATTRIBUTE_NORETURN;
1157 #else /* not ENABLE_RTL_CHECKING */
1159 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N])
1160 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N])
1161 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N])
1162 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
1163 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I])
1164 #define XWINT(RTX, N) ((RTX)->u.hwint[N])
1165 #define CWI_ELT(RTX, I) ((RTX)->u.hwiv.elem[I])
1166 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N])
1167 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
1168 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N])
1169 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv)
1170 #define XCNMPFV(RTX, C, M) (&(RTX)->u.fv)
1171 #define REG_CHECK(RTX) (&(RTX)->u.reg)
1172 #define BLOCK_SYMBOL_CHECK(RTX) (&(RTX)->u.block_sym)
1173 #define HWIVEC_CHECK(RTX,C) (&(RTX)->u.hwiv)
1175 #endif
1177 /* General accessor macros for accessing the flags of an rtx. */
1179 /* Access an individual rtx flag, with no checking of any kind. */
1180 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG)
1182 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
1183 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \
1184 ({ __typeof (RTX) const _rtx = (RTX); \
1185 if (GET_CODE (_rtx) != C1) \
1186 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
1187 __FUNCTION__); \
1188 _rtx; })
1190 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \
1191 ({ __typeof (RTX) const _rtx = (RTX); \
1192 if (GET_CODE (_rtx) != C1 && GET_CODE(_rtx) != C2) \
1193 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
1194 __FUNCTION__); \
1195 _rtx; })
1197 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \
1198 ({ __typeof (RTX) const _rtx = (RTX); \
1199 if (GET_CODE (_rtx) != C1 && GET_CODE(_rtx) != C2 \
1200 && GET_CODE (_rtx) != C3) \
1201 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
1202 __FUNCTION__); \
1203 _rtx; })
1205 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \
1206 ({ __typeof (RTX) const _rtx = (RTX); \
1207 if (GET_CODE (_rtx) != C1 && GET_CODE(_rtx) != C2 \
1208 && GET_CODE (_rtx) != C3 && GET_CODE(_rtx) != C4) \
1209 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
1210 __FUNCTION__); \
1211 _rtx; })
1213 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \
1214 ({ __typeof (RTX) const _rtx = (RTX); \
1215 if (GET_CODE (_rtx) != C1 && GET_CODE (_rtx) != C2 \
1216 && GET_CODE (_rtx) != C3 && GET_CODE (_rtx) != C4 \
1217 && GET_CODE (_rtx) != C5) \
1218 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
1219 __FUNCTION__); \
1220 _rtx; })
1222 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \
1223 __extension__ \
1224 ({ __typeof (RTX) const _rtx = (RTX); \
1225 if (GET_CODE (_rtx) != C1 && GET_CODE (_rtx) != C2 \
1226 && GET_CODE (_rtx) != C3 && GET_CODE (_rtx) != C4 \
1227 && GET_CODE (_rtx) != C5 && GET_CODE (_rtx) != C6) \
1228 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \
1229 __FUNCTION__); \
1230 _rtx; })
1232 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \
1233 __extension__ \
1234 ({ __typeof (RTX) const _rtx = (RTX); \
1235 if (GET_CODE (_rtx) != C1 && GET_CODE (_rtx) != C2 \
1236 && GET_CODE (_rtx) != C3 && GET_CODE (_rtx) != C4 \
1237 && GET_CODE (_rtx) != C5 && GET_CODE (_rtx) != C6 \
1238 && GET_CODE (_rtx) != C7) \
1239 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
1240 __FUNCTION__); \
1241 _rtx; })
1243 #define RTL_INSN_CHAIN_FLAG_CHECK(NAME, RTX) \
1244 __extension__ \
1245 ({ __typeof (RTX) const _rtx = (RTX); \
1246 if (!INSN_CHAIN_CODE_P (GET_CODE (_rtx))) \
1247 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \
1248 __FUNCTION__); \
1249 _rtx; })
1251 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
1252 int, const char *)
1253 ATTRIBUTE_NORETURN
1256 #else /* not ENABLE_RTL_FLAG_CHECKING */
1258 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX)
1259 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX)
1260 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX)
1261 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX)
1262 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX)
1263 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX)
1264 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX)
1265 #define RTL_INSN_CHAIN_FLAG_CHECK(NAME, RTX) (RTX)
1266 #endif
1268 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
1269 #define XUINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_uint)
1270 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
1271 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
1272 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
1273 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type)
1274 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree)
1275 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb)
1276 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str)
1277 #define XCFI(RTX, N) (RTL_CHECK1 (RTX, N, 'C').rt_cfi)
1279 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M)
1280 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N))
1282 /* These are like XINT, etc. except that they expect a '0' field instead
1283 of the normal type code. */
1285 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int)
1286 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint)
1287 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str)
1288 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx)
1289 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
1290 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type)
1291 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree)
1292 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb)
1293 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
1294 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib)
1295 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
1296 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
1298 /* Access a '0' field with any type. */
1299 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0')
1301 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int)
1302 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint)
1303 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str)
1304 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx)
1305 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
1306 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type)
1307 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree)
1308 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb)
1309 #define XCCFI(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cfi)
1310 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib)
1312 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M)
1313 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C))
1315 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
1318 /* Methods of rtx_expr_list. */
1320 inline rtx_expr_list *rtx_expr_list::next () const
1322 rtx tmp = XEXP (this, 1);
1323 return safe_as_a <rtx_expr_list *> (tmp);
1326 inline rtx rtx_expr_list::element () const
1328 return XEXP (this, 0);
1331 /* Methods of rtx_insn_list. */
1333 inline rtx_insn_list *rtx_insn_list::next () const
1335 rtx tmp = XEXP (this, 1);
1336 return safe_as_a <rtx_insn_list *> (tmp);
1339 inline rtx_insn *rtx_insn_list::insn () const
1341 rtx tmp = XEXP (this, 0);
1342 return safe_as_a <rtx_insn *> (tmp);
1345 /* Methods of rtx_sequence. */
1347 inline int rtx_sequence::len () const
1349 return XVECLEN (this, 0);
1352 inline rtx rtx_sequence::element (int index) const
1354 return XVECEXP (this, 0, index);
1357 inline rtx_insn *rtx_sequence::insn (int index) const
1359 return as_a <rtx_insn *> (XVECEXP (this, 0, index));
1362 /* ACCESS MACROS for particular fields of insns. */
1364 /* Holds a unique number for each insn.
1365 These are not necessarily sequentially increasing. */
1366 inline int INSN_UID (const_rtx insn)
1368 return RTL_INSN_CHAIN_FLAG_CHECK ("INSN_UID",
1369 (insn))->u2.insn_uid;
1371 inline int& INSN_UID (rtx insn)
1373 return RTL_INSN_CHAIN_FLAG_CHECK ("INSN_UID",
1374 (insn))->u2.insn_uid;
1377 /* Chain insns together in sequence. */
1379 /* For now these are split in two: an rvalue form:
1380 PREV_INSN/NEXT_INSN
1381 and an lvalue form:
1382 SET_NEXT_INSN/SET_PREV_INSN. */
1384 inline rtx_insn *PREV_INSN (const rtx_insn *insn)
1386 rtx prev = XEXP (insn, 0);
1387 return safe_as_a <rtx_insn *> (prev);
1390 inline rtx& SET_PREV_INSN (rtx_insn *insn)
1392 return XEXP (insn, 0);
1395 inline rtx_insn *NEXT_INSN (const rtx_insn *insn)
1397 rtx next = XEXP (insn, 1);
1398 return safe_as_a <rtx_insn *> (next);
1401 inline rtx& SET_NEXT_INSN (rtx_insn *insn)
1403 return XEXP (insn, 1);
1406 inline basic_block BLOCK_FOR_INSN (const_rtx insn)
1408 return XBBDEF (insn, 2);
1411 inline basic_block& BLOCK_FOR_INSN (rtx insn)
1413 return XBBDEF (insn, 2);
1416 inline void set_block_for_insn (rtx_insn *insn, basic_block bb)
1418 BLOCK_FOR_INSN (insn) = bb;
1421 /* The body of an insn. */
1422 inline rtx PATTERN (const_rtx insn)
1424 return XEXP (insn, 3);
1427 inline rtx& PATTERN (rtx insn)
1429 return XEXP (insn, 3);
1432 inline unsigned int INSN_LOCATION (const rtx_insn *insn)
1434 return XUINT (insn, 4);
1437 inline unsigned int& INSN_LOCATION (rtx_insn *insn)
1439 return XUINT (insn, 4);
1442 inline bool INSN_HAS_LOCATION (const rtx_insn *insn)
1444 return LOCATION_LOCUS (INSN_LOCATION (insn)) != UNKNOWN_LOCATION;
1447 /* LOCATION of an RTX if relevant. */
1448 #define RTL_LOCATION(X) (INSN_P (X) ? \
1449 INSN_LOCATION (as_a <rtx_insn *> (X)) \
1450 : UNKNOWN_LOCATION)
1452 /* Code number of instruction, from when it was recognized.
1453 -1 means this instruction has not been recognized yet. */
1454 #define INSN_CODE(INSN) XINT (INSN, 5)
1456 inline rtvec rtx_jump_table_data::get_labels () const
1458 rtx pat = PATTERN (this);
1459 if (GET_CODE (pat) == ADDR_VEC)
1460 return XVEC (pat, 0);
1461 else
1462 return XVEC (pat, 1); /* presumably an ADDR_DIFF_VEC */
1465 #define RTX_FRAME_RELATED_P(RTX) \
1466 (RTL_FLAG_CHECK6 ("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN, \
1467 CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
1469 /* 1 if JUMP RTX is a crossing jump. */
1470 #define CROSSING_JUMP_P(RTX) \
1471 (RTL_FLAG_CHECK1 ("CROSSING_JUMP_P", (RTX), JUMP_INSN)->jump)
1473 /* 1 if RTX is a call to a const function. Built from ECF_CONST and
1474 TREE_READONLY. */
1475 #define RTL_CONST_CALL_P(RTX) \
1476 (RTL_FLAG_CHECK1 ("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
1478 /* 1 if RTX is a call to a pure function. Built from ECF_PURE and
1479 DECL_PURE_P. */
1480 #define RTL_PURE_CALL_P(RTX) \
1481 (RTL_FLAG_CHECK1 ("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
1483 /* 1 if RTX is a call to a const or pure function. */
1484 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
1485 (RTL_CONST_CALL_P (RTX) || RTL_PURE_CALL_P (RTX))
1487 /* 1 if RTX is a call to a looping const or pure function. Built from
1488 ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
1489 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX) \
1490 (RTL_FLAG_CHECK1 ("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
1492 /* 1 if RTX is a call_insn for a sibling call. */
1493 #define SIBLING_CALL_P(RTX) \
1494 (RTL_FLAG_CHECK1 ("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
1496 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */
1497 #define INSN_ANNULLED_BRANCH_P(RTX) \
1498 (RTL_FLAG_CHECK1 ("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN)->unchanging)
1500 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
1501 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
1502 executed if the branch is taken. For annulled branches with this bit
1503 clear, the insn should be executed only if the branch is not taken. */
1504 #define INSN_FROM_TARGET_P(RTX) \
1505 (RTL_FLAG_CHECK3 ("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, \
1506 CALL_INSN)->in_struct)
1508 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
1509 See the comments for ADDR_DIFF_VEC in rtl.def. */
1510 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS (RTX, 4)
1512 /* In a VALUE, the value cselib has assigned to RTX.
1513 This is a "struct cselib_val", see cselib.h. */
1514 #define CSELIB_VAL_PTR(RTX) X0CSELIB (RTX, 0)
1516 /* Holds a list of notes on what this insn does to various REGs.
1517 It is a chain of EXPR_LIST rtx's, where the second operand is the
1518 chain pointer and the first operand is the REG being described.
1519 The mode field of the EXPR_LIST contains not a real machine mode
1520 but a value from enum reg_note. */
1521 #define REG_NOTES(INSN) XEXP(INSN, 6)
1523 /* In an ENTRY_VALUE this is the DECL_INCOMING_RTL of the argument in
1524 question. */
1525 #define ENTRY_VALUE_EXP(RTX) (RTL_CHECKC1 (RTX, 0, ENTRY_VALUE).rt_rtx)
1527 enum reg_note
1529 #define DEF_REG_NOTE(NAME) NAME,
1530 #include "reg-notes.def"
1531 #undef DEF_REG_NOTE
1532 REG_NOTE_MAX
1535 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
1536 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
1537 #define PUT_REG_NOTE_KIND(LINK, KIND) \
1538 PUT_MODE_RAW (LINK, (machine_mode) (KIND))
1540 /* Names for REG_NOTE's in EXPR_LIST insn's. */
1542 extern const char * const reg_note_name[];
1543 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
1545 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
1546 USE and CLOBBER expressions.
1547 USE expressions list the registers filled with arguments that
1548 are passed to the function.
1549 CLOBBER expressions document the registers explicitly clobbered
1550 by this CALL_INSN.
1551 Pseudo registers can not be mentioned in this list. */
1552 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7)
1554 /* The label-number of a code-label. The assembler label
1555 is made from `L' and the label-number printed in decimal.
1556 Label numbers are unique in a compilation. */
1557 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 5)
1559 /* In a NOTE that is a line number, this is a string for the file name that the
1560 line is in. We use the same field to record block numbers temporarily in
1561 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
1562 between ints and pointers if we use a different macro for the block number.)
1565 /* Opaque data. */
1566 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 3, NOTE)
1567 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 3, NOTE)
1568 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
1569 #define NOTE_BLOCK(INSN) XCTREE (INSN, 3, NOTE)
1570 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 3, NOTE)
1571 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 3, NOTE)
1572 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 3, NOTE)
1573 #define NOTE_CFI(INSN) XCCFI (INSN, 3, NOTE)
1574 #define NOTE_LABEL_NUMBER(INSN) XCINT (INSN, 3, NOTE)
1576 /* In a NOTE that is a line number, this is the line number.
1577 Other kinds of NOTEs are identified by negative numbers here. */
1578 #define NOTE_KIND(INSN) XCINT (INSN, 4, NOTE)
1580 /* Nonzero if INSN is a note marking the beginning of a basic block. */
1581 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \
1582 (NOTE_P (INSN) && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
1584 /* Variable declaration and the location of a variable. */
1585 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
1586 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
1588 /* Initialization status of the variable in the location. Status
1589 can be unknown, uninitialized or initialized. See enumeration
1590 type below. */
1591 #define PAT_VAR_LOCATION_STATUS(PAT) \
1592 (RTL_FLAG_CHECK1 ("PAT_VAR_LOCATION_STATUS", PAT, VAR_LOCATION) \
1593 ->u2.var_location_status)
1595 /* Accessors for a NOTE_INSN_VAR_LOCATION. */
1596 #define NOTE_VAR_LOCATION_DECL(NOTE) \
1597 PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
1598 #define NOTE_VAR_LOCATION_LOC(NOTE) \
1599 PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
1600 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
1601 PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
1603 /* The VAR_LOCATION rtx in a DEBUG_INSN. */
1604 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
1606 /* Accessors for a tree-expanded var location debug insn. */
1607 #define INSN_VAR_LOCATION_DECL(INSN) \
1608 PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
1609 #define INSN_VAR_LOCATION_LOC(INSN) \
1610 PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
1611 #define INSN_VAR_LOCATION_STATUS(INSN) \
1612 PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
1614 /* Expand to the RTL that denotes an unknown variable location in a
1615 DEBUG_INSN. */
1616 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
1618 /* Determine whether X is such an unknown location. */
1619 #define VAR_LOC_UNKNOWN_P(X) \
1620 (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
1622 /* 1 if RTX is emitted after a call, but it should take effect before
1623 the call returns. */
1624 #define NOTE_DURING_CALL_P(RTX) \
1625 (RTL_FLAG_CHECK1 ("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
1627 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX. */
1628 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
1630 /* VAR_DECL/PARM_DECL DEBUG_IMPLICIT_PTR takes address of. */
1631 #define DEBUG_IMPLICIT_PTR_DECL(RTX) XCTREE (RTX, 0, DEBUG_IMPLICIT_PTR)
1633 /* PARM_DECL DEBUG_PARAMETER_REF references. */
1634 #define DEBUG_PARAMETER_REF_DECL(RTX) XCTREE (RTX, 0, DEBUG_PARAMETER_REF)
1636 /* Codes that appear in the NOTE_KIND field for kinds of notes
1637 that are not line numbers. These codes are all negative.
1639 Notice that we do not try to use zero here for any of
1640 the special note codes because sometimes the source line
1641 actually can be zero! This happens (for example) when we
1642 are generating code for the per-translation-unit constructor
1643 and destructor routines for some C++ translation unit. */
1645 enum insn_note
1647 #define DEF_INSN_NOTE(NAME) NAME,
1648 #include "insn-notes.def"
1649 #undef DEF_INSN_NOTE
1651 NOTE_INSN_MAX
1654 /* Names for NOTE insn's other than line numbers. */
1656 extern const char * const note_insn_name[NOTE_INSN_MAX];
1657 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
1658 (note_insn_name[(NOTE_CODE)])
1660 /* The name of a label, in case it corresponds to an explicit label
1661 in the input source code. */
1662 #define LABEL_NAME(RTX) XCSTR (RTX, 6, CODE_LABEL)
1664 /* In jump.c, each label contains a count of the number
1665 of LABEL_REFs that point at it, so unused labels can be deleted. */
1666 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
1668 /* Labels carry a two-bit field composed of the ->jump and ->call
1669 bits. This field indicates whether the label is an alternate
1670 entry point, and if so, what kind. */
1671 enum label_kind
1673 LABEL_NORMAL = 0, /* ordinary label */
1674 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */
1675 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */
1676 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */
1679 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1681 /* Retrieve the kind of LABEL. */
1682 #define LABEL_KIND(LABEL) __extension__ \
1683 ({ __typeof (LABEL) const _label = (LABEL); \
1684 if (! LABEL_P (_label)) \
1685 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \
1686 __FUNCTION__); \
1687 (enum label_kind) ((_label->jump << 1) | _label->call); })
1689 /* Set the kind of LABEL. */
1690 #define SET_LABEL_KIND(LABEL, KIND) do { \
1691 __typeof (LABEL) const _label = (LABEL); \
1692 const unsigned int _kind = (KIND); \
1693 if (! LABEL_P (_label)) \
1694 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1695 __FUNCTION__); \
1696 _label->jump = ((_kind >> 1) & 1); \
1697 _label->call = (_kind & 1); \
1698 } while (0)
1700 #else
1702 /* Retrieve the kind of LABEL. */
1703 #define LABEL_KIND(LABEL) \
1704 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1706 /* Set the kind of LABEL. */
1707 #define SET_LABEL_KIND(LABEL, KIND) do { \
1708 rtx const _label = (LABEL); \
1709 const unsigned int _kind = (KIND); \
1710 _label->jump = ((_kind >> 1) & 1); \
1711 _label->call = (_kind & 1); \
1712 } while (0)
1714 #endif /* rtl flag checking */
1716 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1718 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1719 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1720 be decremented and possibly the label can be deleted. */
1721 #define JUMP_LABEL(INSN) XCEXP (INSN, 7, JUMP_INSN)
1723 inline rtx_insn *JUMP_LABEL_AS_INSN (const rtx_insn *insn)
1725 return safe_as_a <rtx_insn *> (JUMP_LABEL (insn));
1728 /* Methods of rtx_jump_insn. */
1730 inline rtx rtx_jump_insn::jump_label () const
1732 return JUMP_LABEL (this);
1735 inline rtx_code_label *rtx_jump_insn::jump_target () const
1737 return safe_as_a <rtx_code_label *> (JUMP_LABEL (this));
1740 inline void rtx_jump_insn::set_jump_target (rtx_code_label *target)
1742 JUMP_LABEL (this) = target;
1745 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1746 goes through all the LABEL_REFs that jump to that label. The chain
1747 eventually winds up at the CODE_LABEL: it is circular. */
1748 #define LABEL_REFS(LABEL) XCEXP (LABEL, 3, CODE_LABEL)
1750 /* Get the label that a LABEL_REF references. */
1751 #define LABEL_REF_LABEL(LABREF) XCEXP (LABREF, 0, LABEL_REF)
1754 /* For a REG rtx, REGNO extracts the register number. REGNO can only
1755 be used on RHS. Use SET_REGNO to change the value. */
1756 #define REGNO(RTX) (rhs_regno(RTX))
1757 #define SET_REGNO(RTX, N) (df_ref_change_reg_with_loc (RTX, N))
1759 /* Return the number of consecutive registers in a REG. This is always
1760 1 for pseudo registers and is determined by HARD_REGNO_NREGS for
1761 hard registers. */
1762 #define REG_NREGS(RTX) (REG_CHECK (RTX)->nregs)
1764 /* ORIGINAL_REGNO holds the number the register originally had; for a
1765 pseudo register turned into a hard reg this will hold the old pseudo
1766 register number. */
1767 #define ORIGINAL_REGNO(RTX) \
1768 (RTL_FLAG_CHECK1 ("ORIGINAL_REGNO", (RTX), REG)->u2.original_regno)
1770 /* Force the REGNO macro to only be used on the lhs. */
1771 static inline unsigned int
1772 rhs_regno (const_rtx x)
1774 return REG_CHECK (x)->regno;
1777 /* Return the final register in REG X plus one. */
1778 static inline unsigned int
1779 END_REGNO (const_rtx x)
1781 return REGNO (x) + REG_NREGS (x);
1784 /* Change the REGNO and REG_NREGS of REG X to the specified values,
1785 bypassing the df machinery. */
1786 static inline void
1787 set_regno_raw (rtx x, unsigned int regno, unsigned int nregs)
1789 reg_info *reg = REG_CHECK (x);
1790 reg->regno = regno;
1791 reg->nregs = nregs;
1794 /* 1 if RTX is a reg or parallel that is the current function's return
1795 value. */
1796 #define REG_FUNCTION_VALUE_P(RTX) \
1797 (RTL_FLAG_CHECK2 ("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1799 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */
1800 #define REG_USERVAR_P(RTX) \
1801 (RTL_FLAG_CHECK1 ("REG_USERVAR_P", (RTX), REG)->volatil)
1803 /* 1 if RTX is a reg that holds a pointer value. */
1804 #define REG_POINTER(RTX) \
1805 (RTL_FLAG_CHECK1 ("REG_POINTER", (RTX), REG)->frame_related)
1807 /* 1 if RTX is a mem that holds a pointer value. */
1808 #define MEM_POINTER(RTX) \
1809 (RTL_FLAG_CHECK1 ("MEM_POINTER", (RTX), MEM)->frame_related)
1811 /* 1 if the given register REG corresponds to a hard register. */
1812 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1814 /* 1 if the given register number REG_NO corresponds to a hard register. */
1815 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1817 /* For a CONST_INT rtx, INTVAL extracts the integer. */
1818 #define INTVAL(RTX) XCWINT (RTX, 0, CONST_INT)
1819 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1821 /* For a CONST_WIDE_INT, CONST_WIDE_INT_NUNITS is the number of
1822 elements actually needed to represent the constant.
1823 CONST_WIDE_INT_ELT gets one of the elements. 0 is the least
1824 significant HOST_WIDE_INT. */
1825 #define CONST_WIDE_INT_VEC(RTX) HWIVEC_CHECK (RTX, CONST_WIDE_INT)
1826 #define CONST_WIDE_INT_NUNITS(RTX) CWI_GET_NUM_ELEM (RTX)
1827 #define CONST_WIDE_INT_ELT(RTX, N) CWI_ELT (RTX, N)
1829 /* For a CONST_DOUBLE:
1830 #if TARGET_SUPPORTS_WIDE_INT == 0
1831 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1832 low-order word and ..._HIGH the high-order.
1833 #endif
1834 For a float, there is a REAL_VALUE_TYPE structure, and
1835 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */
1836 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1837 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1838 #define CONST_DOUBLE_REAL_VALUE(r) \
1839 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1841 #define CONST_FIXED_VALUE(r) \
1842 ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1843 #define CONST_FIXED_VALUE_HIGH(r) \
1844 ((HOST_WIDE_INT) (CONST_FIXED_VALUE (r)->data.high))
1845 #define CONST_FIXED_VALUE_LOW(r) \
1846 ((HOST_WIDE_INT) (CONST_FIXED_VALUE (r)->data.low))
1848 /* For a CONST_VECTOR, return element #n. */
1849 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1851 /* For a CONST_VECTOR, return the number of elements in a vector. */
1852 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1854 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1855 SUBREG_BYTE extracts the byte-number. */
1857 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1858 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1860 /* in rtlanal.c */
1861 /* Return the right cost to give to an operation
1862 to make the cost of the corresponding register-to-register instruction
1863 N times that of a fast register-to-register instruction. */
1864 #define COSTS_N_INSNS(N) ((N) * 4)
1866 /* Maximum cost of an rtl expression. This value has the special meaning
1867 not to use an rtx with this cost under any circumstances. */
1868 #define MAX_COST INT_MAX
1870 /* Return true if CODE always has VOIDmode. */
1872 static inline bool
1873 always_void_p (enum rtx_code code)
1875 return code == SET;
1878 /* A structure to hold all available cost information about an rtl
1879 expression. */
1880 struct full_rtx_costs
1882 int speed;
1883 int size;
1886 /* Initialize a full_rtx_costs structure C to the maximum cost. */
1887 static inline void
1888 init_costs_to_max (struct full_rtx_costs *c)
1890 c->speed = MAX_COST;
1891 c->size = MAX_COST;
1894 /* Initialize a full_rtx_costs structure C to zero cost. */
1895 static inline void
1896 init_costs_to_zero (struct full_rtx_costs *c)
1898 c->speed = 0;
1899 c->size = 0;
1902 /* Compare two full_rtx_costs structures A and B, returning true
1903 if A < B when optimizing for speed. */
1904 static inline bool
1905 costs_lt_p (struct full_rtx_costs *a, struct full_rtx_costs *b,
1906 bool speed)
1908 if (speed)
1909 return (a->speed < b->speed
1910 || (a->speed == b->speed && a->size < b->size));
1911 else
1912 return (a->size < b->size
1913 || (a->size == b->size && a->speed < b->speed));
1916 /* Increase both members of the full_rtx_costs structure C by the
1917 cost of N insns. */
1918 static inline void
1919 costs_add_n_insns (struct full_rtx_costs *c, int n)
1921 c->speed += COSTS_N_INSNS (n);
1922 c->size += COSTS_N_INSNS (n);
1925 /* Describes the shape of a subreg:
1927 inner_mode == the mode of the SUBREG_REG
1928 offset == the SUBREG_BYTE
1929 outer_mode == the mode of the SUBREG itself. */
1930 struct subreg_shape {
1931 subreg_shape (machine_mode, unsigned int, machine_mode);
1932 bool operator == (const subreg_shape &) const;
1933 bool operator != (const subreg_shape &) const;
1934 unsigned int unique_id () const;
1936 machine_mode inner_mode;
1937 unsigned int offset;
1938 machine_mode outer_mode;
1941 inline
1942 subreg_shape::subreg_shape (machine_mode inner_mode_in,
1943 unsigned int offset_in,
1944 machine_mode outer_mode_in)
1945 : inner_mode (inner_mode_in), offset (offset_in), outer_mode (outer_mode_in)
1948 inline bool
1949 subreg_shape::operator == (const subreg_shape &other) const
1951 return (inner_mode == other.inner_mode
1952 && offset == other.offset
1953 && outer_mode == other.outer_mode);
1956 inline bool
1957 subreg_shape::operator != (const subreg_shape &other) const
1959 return !operator == (other);
1962 /* Return an integer that uniquely identifies this shape. Structures
1963 like rtx_def assume that a mode can fit in an 8-bit bitfield and no
1964 current mode is anywhere near being 65536 bytes in size, so the
1965 id comfortably fits in an int. */
1967 inline unsigned int
1968 subreg_shape::unique_id () const
1970 STATIC_ASSERT (MAX_MACHINE_MODE <= 256);
1971 return (int) inner_mode + ((int) outer_mode << 8) + (offset << 16);
1974 /* Return the shape of a SUBREG rtx. */
1976 static inline subreg_shape
1977 shape_of_subreg (const_rtx x)
1979 return subreg_shape (GET_MODE (SUBREG_REG (x)),
1980 SUBREG_BYTE (x), GET_MODE (x));
1983 /* Information about an address. This structure is supposed to be able
1984 to represent all supported target addresses. Please extend it if it
1985 is not yet general enough. */
1986 struct address_info {
1987 /* The mode of the value being addressed, or VOIDmode if this is
1988 a load-address operation with no known address mode. */
1989 machine_mode mode;
1991 /* The address space. */
1992 addr_space_t as;
1994 /* A pointer to the top-level address. */
1995 rtx *outer;
1997 /* A pointer to the inner address, after all address mutations
1998 have been stripped from the top-level address. It can be one
1999 of the following:
2001 - A {PRE,POST}_{INC,DEC} of *BASE. SEGMENT, INDEX and DISP are null.
2003 - A {PRE,POST}_MODIFY of *BASE. In this case either INDEX or DISP
2004 points to the step value, depending on whether the step is variable
2005 or constant respectively. SEGMENT is null.
2007 - A plain sum of the form SEGMENT + BASE + INDEX + DISP,
2008 with null fields evaluating to 0. */
2009 rtx *inner;
2011 /* Components that make up *INNER. Each one may be null or nonnull.
2012 When nonnull, their meanings are as follows:
2014 - *SEGMENT is the "segment" of memory to which the address refers.
2015 This value is entirely target-specific and is only called a "segment"
2016 because that's its most typical use. It contains exactly one UNSPEC,
2017 pointed to by SEGMENT_TERM. The contents of *SEGMENT do not need
2018 reloading.
2020 - *BASE is a variable expression representing a base address.
2021 It contains exactly one REG, SUBREG or MEM, pointed to by BASE_TERM.
2023 - *INDEX is a variable expression representing an index value.
2024 It may be a scaled expression, such as a MULT. It has exactly
2025 one REG, SUBREG or MEM, pointed to by INDEX_TERM.
2027 - *DISP is a constant, possibly mutated. DISP_TERM points to the
2028 unmutated RTX_CONST_OBJ. */
2029 rtx *segment;
2030 rtx *base;
2031 rtx *index;
2032 rtx *disp;
2034 rtx *segment_term;
2035 rtx *base_term;
2036 rtx *index_term;
2037 rtx *disp_term;
2039 /* In a {PRE,POST}_MODIFY address, this points to a second copy
2040 of BASE_TERM, otherwise it is null. */
2041 rtx *base_term2;
2043 /* ADDRESS if this structure describes an address operand, MEM if
2044 it describes a MEM address. */
2045 enum rtx_code addr_outer_code;
2047 /* If BASE is nonnull, this is the code of the rtx that contains it. */
2048 enum rtx_code base_outer_code;
2050 /* True if this is an RTX_AUTOINC address. */
2051 bool autoinc_p;
2054 /* This is used to bundle an rtx and a mode together so that the pair
2055 can be used with the wi:: routines. If we ever put modes into rtx
2056 integer constants, this should go away and then just pass an rtx in. */
2057 typedef std::pair <rtx, machine_mode> rtx_mode_t;
2059 namespace wi
2061 template <>
2062 struct int_traits <rtx_mode_t>
2064 static const enum precision_type precision_type = VAR_PRECISION;
2065 static const bool host_dependent_precision = false;
2066 /* This ought to be true, except for the special case that BImode
2067 is canonicalized to STORE_FLAG_VALUE, which might be 1. */
2068 static const bool is_sign_extended = false;
2069 static unsigned int get_precision (const rtx_mode_t &);
2070 static wi::storage_ref decompose (HOST_WIDE_INT *, unsigned int,
2071 const rtx_mode_t &);
2075 inline unsigned int
2076 wi::int_traits <rtx_mode_t>::get_precision (const rtx_mode_t &x)
2078 return GET_MODE_PRECISION (x.second);
2081 inline wi::storage_ref
2082 wi::int_traits <rtx_mode_t>::decompose (HOST_WIDE_INT *,
2083 unsigned int precision,
2084 const rtx_mode_t &x)
2086 gcc_checking_assert (precision == get_precision (x));
2087 switch (GET_CODE (x.first))
2089 case CONST_INT:
2090 if (precision < HOST_BITS_PER_WIDE_INT)
2091 /* Nonzero BImodes are stored as STORE_FLAG_VALUE, which on many
2092 targets is 1 rather than -1. */
2093 gcc_checking_assert (INTVAL (x.first)
2094 == sext_hwi (INTVAL (x.first), precision)
2095 || (x.second == BImode && INTVAL (x.first) == 1));
2097 return wi::storage_ref (&INTVAL (x.first), 1, precision);
2099 case CONST_WIDE_INT:
2100 return wi::storage_ref (&CONST_WIDE_INT_ELT (x.first, 0),
2101 CONST_WIDE_INT_NUNITS (x.first), precision);
2103 #if TARGET_SUPPORTS_WIDE_INT == 0
2104 case CONST_DOUBLE:
2105 return wi::storage_ref (&CONST_DOUBLE_LOW (x.first), 2, precision);
2106 #endif
2108 default:
2109 gcc_unreachable ();
2113 namespace wi
2115 hwi_with_prec shwi (HOST_WIDE_INT, machine_mode mode);
2116 wide_int min_value (machine_mode, signop);
2117 wide_int max_value (machine_mode, signop);
2120 inline wi::hwi_with_prec
2121 wi::shwi (HOST_WIDE_INT val, machine_mode mode)
2123 return shwi (val, GET_MODE_PRECISION (mode));
2126 /* Produce the smallest number that is represented in MODE. The precision
2127 is taken from MODE and the sign from SGN. */
2128 inline wide_int
2129 wi::min_value (machine_mode mode, signop sgn)
2131 return min_value (GET_MODE_PRECISION (mode), sgn);
2134 /* Produce the largest number that is represented in MODE. The precision
2135 is taken from MODE and the sign from SGN. */
2136 inline wide_int
2137 wi::max_value (machine_mode mode, signop sgn)
2139 return max_value (GET_MODE_PRECISION (mode), sgn);
2142 extern void init_rtlanal (void);
2143 extern int rtx_cost (rtx, enum rtx_code, int, bool);
2144 extern int address_cost (rtx, machine_mode, addr_space_t, bool);
2145 extern void get_full_rtx_cost (rtx, enum rtx_code, int,
2146 struct full_rtx_costs *);
2147 extern unsigned int subreg_lsb (const_rtx);
2148 extern unsigned int subreg_lsb_1 (machine_mode, machine_mode,
2149 unsigned int);
2150 extern unsigned int subreg_regno_offset (unsigned int, machine_mode,
2151 unsigned int, machine_mode);
2152 extern bool subreg_offset_representable_p (unsigned int, machine_mode,
2153 unsigned int, machine_mode);
2154 extern unsigned int subreg_regno (const_rtx);
2155 extern int simplify_subreg_regno (unsigned int, machine_mode,
2156 unsigned int, machine_mode);
2157 extern unsigned int subreg_nregs (const_rtx);
2158 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
2159 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, machine_mode);
2160 extern unsigned int num_sign_bit_copies (const_rtx, machine_mode);
2161 extern bool constant_pool_constant_p (rtx);
2162 extern bool truncated_to_mode (machine_mode, const_rtx);
2163 extern int low_bitmask_len (machine_mode, unsigned HOST_WIDE_INT);
2164 extern void split_double (rtx, rtx *, rtx *);
2165 extern rtx *strip_address_mutations (rtx *, enum rtx_code * = 0);
2166 extern void decompose_address (struct address_info *, rtx *,
2167 machine_mode, addr_space_t, enum rtx_code);
2168 extern void decompose_lea_address (struct address_info *, rtx *);
2169 extern void decompose_mem_address (struct address_info *, rtx);
2170 extern void update_address (struct address_info *);
2171 extern HOST_WIDE_INT get_index_scale (const struct address_info *);
2172 extern enum rtx_code get_index_code (const struct address_info *);
2174 #ifndef GENERATOR_FILE
2175 /* Return the cost of SET X. SPEED_P is true if optimizing for speed
2176 rather than size. */
2178 static inline int
2179 set_rtx_cost (rtx x, bool speed_p)
2181 return rtx_cost (x, INSN, 4, speed_p);
2184 /* Like set_rtx_cost, but return both the speed and size costs in C. */
2186 static inline void
2187 get_full_set_rtx_cost (rtx x, struct full_rtx_costs *c)
2189 get_full_rtx_cost (x, INSN, 4, c);
2192 /* Return the cost of moving X into a register, relative to the cost
2193 of a register move. SPEED_P is true if optimizing for speed rather
2194 than size. */
2196 static inline int
2197 set_src_cost (rtx x, bool speed_p)
2199 return rtx_cost (x, SET, 1, speed_p);
2202 /* Like set_src_cost, but return both the speed and size costs in C. */
2204 static inline void
2205 get_full_set_src_cost (rtx x, struct full_rtx_costs *c)
2207 get_full_rtx_cost (x, SET, 1, c);
2209 #endif
2211 /* 1 if RTX is a subreg containing a reg that is already known to be
2212 sign- or zero-extended from the mode of the subreg to the mode of
2213 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
2214 extension.
2216 When used as a LHS, is means that this extension must be done
2217 when assigning to SUBREG_REG. */
2219 #define SUBREG_PROMOTED_VAR_P(RTX) \
2220 (RTL_FLAG_CHECK1 ("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
2222 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P(). In that case
2223 this gives the necessary extensions:
2224 0 - signed (SPR_SIGNED)
2225 1 - normal unsigned (SPR_UNSIGNED)
2226 2 - value is both sign and unsign extended for mode
2227 (SPR_SIGNED_AND_UNSIGNED).
2228 -1 - pointer unsigned, which most often can be handled like unsigned
2229 extension, except for generating instructions where we need to
2230 emit special code (ptr_extend insns) on some architectures
2231 (SPR_POINTER). */
2233 const int SRP_POINTER = -1;
2234 const int SRP_SIGNED = 0;
2235 const int SRP_UNSIGNED = 1;
2236 const int SRP_SIGNED_AND_UNSIGNED = 2;
2238 /* Sets promoted mode for SUBREG_PROMOTED_VAR_P(). */
2239 #define SUBREG_PROMOTED_SET(RTX, VAL) \
2240 do { \
2241 rtx const _rtx = RTL_FLAG_CHECK1 ("SUBREG_PROMOTED_SET", \
2242 (RTX), SUBREG); \
2243 switch (VAL) \
2245 case SRP_POINTER: \
2246 _rtx->volatil = 0; \
2247 _rtx->unchanging = 0; \
2248 break; \
2249 case SRP_SIGNED: \
2250 _rtx->volatil = 0; \
2251 _rtx->unchanging = 1; \
2252 break; \
2253 case SRP_UNSIGNED: \
2254 _rtx->volatil = 1; \
2255 _rtx->unchanging = 0; \
2256 break; \
2257 case SRP_SIGNED_AND_UNSIGNED: \
2258 _rtx->volatil = 1; \
2259 _rtx->unchanging = 1; \
2260 break; \
2262 } while (0)
2264 /* Gets the value stored in promoted mode for SUBREG_PROMOTED_VAR_P(),
2265 including SRP_SIGNED_AND_UNSIGNED if promoted for
2266 both signed and unsigned. */
2267 #define SUBREG_PROMOTED_GET(RTX) \
2268 (2 * (RTL_FLAG_CHECK1 ("SUBREG_PROMOTED_GET", (RTX), SUBREG)->volatil)\
2269 + (RTX)->unchanging - 1)
2271 /* Returns sign of promoted mode for SUBREG_PROMOTED_VAR_P(). */
2272 #define SUBREG_PROMOTED_SIGN(RTX) \
2273 ((RTL_FLAG_CHECK1 ("SUBREG_PROMOTED_SIGN", (RTX), SUBREG)->volatil) ? 1\
2274 : (RTX)->unchanging - 1)
2276 /* Predicate to check if RTX of SUBREG_PROMOTED_VAR_P() is promoted
2277 for SIGNED type. */
2278 #define SUBREG_PROMOTED_SIGNED_P(RTX) \
2279 (RTL_FLAG_CHECK1 ("SUBREG_PROMOTED_SIGNED_P", (RTX), SUBREG)->unchanging)
2281 /* Predicate to check if RTX of SUBREG_PROMOTED_VAR_P() is promoted
2282 for UNSIGNED type. */
2283 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
2284 (RTL_FLAG_CHECK1 ("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil)
2286 /* Checks if RTX of SUBREG_PROMOTED_VAR_P() is promoted for given SIGN. */
2287 #define SUBREG_CHECK_PROMOTED_SIGN(RTX, SIGN) \
2288 ((SIGN) == SRP_POINTER ? SUBREG_PROMOTED_GET (RTX) == SRP_POINTER \
2289 : (SIGN) == SRP_SIGNED ? SUBREG_PROMOTED_SIGNED_P (RTX) \
2290 : SUBREG_PROMOTED_UNSIGNED_P (RTX))
2292 /* True if the subreg was generated by LRA for reload insns. Such
2293 subregs are valid only during LRA. */
2294 #define LRA_SUBREG_P(RTX) \
2295 (RTL_FLAG_CHECK1 ("LRA_SUBREG_P", (RTX), SUBREG)->jump)
2297 /* True if call is instrumented by Pointer Bounds Checker. */
2298 #define CALL_EXPR_WITH_BOUNDS_P(RTX) \
2299 (RTL_FLAG_CHECK1 ("CALL_EXPR_WITH_BOUNDS_P", (RTX), CALL)->jump)
2301 /* Access various components of an ASM_OPERANDS rtx. */
2303 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
2304 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
2305 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
2306 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
2307 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
2308 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
2309 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
2310 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
2311 XCVECEXP (RTX, 4, N, ASM_OPERANDS)
2312 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
2313 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
2314 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \
2315 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
2316 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
2317 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
2318 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
2319 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
2320 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
2322 /* 1 if RTX is a mem that is statically allocated in read-only memory. */
2323 #define MEM_READONLY_P(RTX) \
2324 (RTL_FLAG_CHECK1 ("MEM_READONLY_P", (RTX), MEM)->unchanging)
2326 /* 1 if RTX is a mem and we should keep the alias set for this mem
2327 unchanged when we access a component. Set to 1, or example, when we
2328 are already in a non-addressable component of an aggregate. */
2329 #define MEM_KEEP_ALIAS_SET_P(RTX) \
2330 (RTL_FLAG_CHECK1 ("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
2332 /* 1 if RTX is a mem or asm_operand for a volatile reference. */
2333 #define MEM_VOLATILE_P(RTX) \
2334 (RTL_FLAG_CHECK3 ("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \
2335 ASM_INPUT)->volatil)
2337 /* 1 if RTX is a mem that cannot trap. */
2338 #define MEM_NOTRAP_P(RTX) \
2339 (RTL_FLAG_CHECK1 ("MEM_NOTRAP_P", (RTX), MEM)->call)
2341 /* The memory attribute block. We provide access macros for each value
2342 in the block and provide defaults if none specified. */
2343 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
2345 /* The register attribute block. We provide access macros for each value
2346 in the block and provide defaults if none specified. */
2347 #define REG_ATTRS(RTX) (REG_CHECK (RTX)->attrs)
2349 #ifndef GENERATOR_FILE
2350 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
2351 set, and may alias anything. Otherwise, the MEM can only alias
2352 MEMs in a conflicting alias set. This value is set in a
2353 language-dependent manner in the front-end, and should not be
2354 altered in the back-end. These set numbers are tested with
2355 alias_sets_conflict_p. */
2356 #define MEM_ALIAS_SET(RTX) (get_mem_attrs (RTX)->alias)
2358 /* For a MEM rtx, the decl it is known to refer to, if it is known to
2359 refer to part of a DECL. It may also be a COMPONENT_REF. */
2360 #define MEM_EXPR(RTX) (get_mem_attrs (RTX)->expr)
2362 /* For a MEM rtx, true if its MEM_OFFSET is known. */
2363 #define MEM_OFFSET_KNOWN_P(RTX) (get_mem_attrs (RTX)->offset_known_p)
2365 /* For a MEM rtx, the offset from the start of MEM_EXPR. */
2366 #define MEM_OFFSET(RTX) (get_mem_attrs (RTX)->offset)
2368 /* For a MEM rtx, the address space. */
2369 #define MEM_ADDR_SPACE(RTX) (get_mem_attrs (RTX)->addrspace)
2371 /* For a MEM rtx, true if its MEM_SIZE is known. */
2372 #define MEM_SIZE_KNOWN_P(RTX) (get_mem_attrs (RTX)->size_known_p)
2374 /* For a MEM rtx, the size in bytes of the MEM. */
2375 #define MEM_SIZE(RTX) (get_mem_attrs (RTX)->size)
2377 /* For a MEM rtx, the alignment in bits. We can use the alignment of the
2378 mode as a default when STRICT_ALIGNMENT, but not if not. */
2379 #define MEM_ALIGN(RTX) (get_mem_attrs (RTX)->align)
2380 #else
2381 #define MEM_ADDR_SPACE(RTX) ADDR_SPACE_GENERIC
2382 #endif
2384 /* For a REG rtx, the decl it is known to refer to, if it is known to
2385 refer to part of a DECL. */
2386 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
2388 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
2389 HOST_WIDE_INT. */
2390 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
2392 /* Copy the attributes that apply to memory locations from RHS to LHS. */
2393 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \
2394 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
2395 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
2396 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
2397 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
2398 MEM_POINTER (LHS) = MEM_POINTER (RHS), \
2399 MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
2401 /* 1 if RTX is a label_ref for a nonlocal label. */
2402 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
2403 REG_LABEL_TARGET note. */
2404 #define LABEL_REF_NONLOCAL_P(RTX) \
2405 (RTL_FLAG_CHECK1 ("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
2407 /* 1 if RTX is a code_label that should always be considered to be needed. */
2408 #define LABEL_PRESERVE_P(RTX) \
2409 (RTL_FLAG_CHECK2 ("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
2411 /* During sched, 1 if RTX is an insn that must be scheduled together
2412 with the preceding insn. */
2413 #define SCHED_GROUP_P(RTX) \
2414 (RTL_FLAG_CHECK4 ("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN, \
2415 JUMP_INSN, CALL_INSN)->in_struct)
2417 /* For a SET rtx, SET_DEST is the place that is set
2418 and SET_SRC is the value it is set to. */
2419 #define SET_DEST(RTX) XC2EXP (RTX, 0, SET, CLOBBER)
2420 #define SET_SRC(RTX) XCEXP (RTX, 1, SET)
2421 #define SET_IS_RETURN_P(RTX) \
2422 (RTL_FLAG_CHECK1 ("SET_IS_RETURN_P", (RTX), SET)->jump)
2424 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
2425 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
2426 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
2428 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
2429 conditionally executing the code on, COND_EXEC_CODE is the code
2430 to execute if the condition is true. */
2431 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
2432 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
2434 /* 1 if RTX is a symbol_ref that addresses this function's rtl
2435 constants pool. */
2436 #define CONSTANT_POOL_ADDRESS_P(RTX) \
2437 (RTL_FLAG_CHECK1 ("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
2439 /* 1 if RTX is a symbol_ref that addresses a value in the file's
2440 tree constant pool. This information is private to varasm.c. */
2441 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \
2442 (RTL_FLAG_CHECK1 ("TREE_CONSTANT_POOL_ADDRESS_P", \
2443 (RTX), SYMBOL_REF)->frame_related)
2445 /* Used if RTX is a symbol_ref, for machine-specific purposes. */
2446 #define SYMBOL_REF_FLAG(RTX) \
2447 (RTL_FLAG_CHECK1 ("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
2449 /* 1 if RTX is a symbol_ref that has been the library function in
2450 emit_library_call. */
2451 #define SYMBOL_REF_USED(RTX) \
2452 (RTL_FLAG_CHECK1 ("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
2454 /* 1 if RTX is a symbol_ref for a weak symbol. */
2455 #define SYMBOL_REF_WEAK(RTX) \
2456 (RTL_FLAG_CHECK1 ("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
2458 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
2459 SYMBOL_REF_CONSTANT. */
2460 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 1)
2462 /* Set RTX's SYMBOL_REF_DECL to DECL. RTX must not be a constant
2463 pool symbol. */
2464 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
2465 (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 1) = (DECL))
2467 /* The tree (decl or constant) associated with the symbol, or null. */
2468 #define SYMBOL_REF_DECL(RTX) \
2469 (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 1))
2471 /* Set RTX's SYMBOL_REF_CONSTANT to C. RTX must be a constant pool symbol. */
2472 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
2473 (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 1) = (C))
2475 /* The rtx constant pool entry for a symbol, or null. */
2476 #define SYMBOL_REF_CONSTANT(RTX) \
2477 (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 1) : NULL)
2479 /* A set of flags on a symbol_ref that are, in some respects, redundant with
2480 information derivable from the tree decl associated with this symbol.
2481 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
2482 decl. In some cases this is a bug. But beyond that, it's nice to cache
2483 this information to avoid recomputing it. Finally, this allows space for
2484 the target to store more than one bit of information, as with
2485 SYMBOL_REF_FLAG. */
2486 #define SYMBOL_REF_FLAGS(RTX) \
2487 (RTL_FLAG_CHECK1 ("SYMBOL_REF_FLAGS", (RTX), SYMBOL_REF) \
2488 ->u2.symbol_ref_flags)
2490 /* These flags are common enough to be defined for all targets. They
2491 are computed by the default version of targetm.encode_section_info. */
2493 /* Set if this symbol is a function. */
2494 #define SYMBOL_FLAG_FUNCTION (1 << 0)
2495 #define SYMBOL_REF_FUNCTION_P(RTX) \
2496 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
2497 /* Set if targetm.binds_local_p is true. */
2498 #define SYMBOL_FLAG_LOCAL (1 << 1)
2499 #define SYMBOL_REF_LOCAL_P(RTX) \
2500 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
2501 /* Set if targetm.in_small_data_p is true. */
2502 #define SYMBOL_FLAG_SMALL (1 << 2)
2503 #define SYMBOL_REF_SMALL_P(RTX) \
2504 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
2505 /* The three-bit field at [5:3] is true for TLS variables; use
2506 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */
2507 #define SYMBOL_FLAG_TLS_SHIFT 3
2508 #define SYMBOL_REF_TLS_MODEL(RTX) \
2509 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
2510 /* Set if this symbol is not defined in this translation unit. */
2511 #define SYMBOL_FLAG_EXTERNAL (1 << 6)
2512 #define SYMBOL_REF_EXTERNAL_P(RTX) \
2513 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
2514 /* Set if this symbol has a block_symbol structure associated with it. */
2515 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
2516 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
2517 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
2518 /* Set if this symbol is a section anchor. SYMBOL_REF_ANCHOR_P implies
2519 SYMBOL_REF_HAS_BLOCK_INFO_P. */
2520 #define SYMBOL_FLAG_ANCHOR (1 << 8)
2521 #define SYMBOL_REF_ANCHOR_P(RTX) \
2522 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
2524 /* Subsequent bits are available for the target to use. */
2525 #define SYMBOL_FLAG_MACH_DEP_SHIFT 9
2526 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
2528 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
2529 structure to which the symbol belongs, or NULL if it has not been
2530 assigned a block. */
2531 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
2533 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
2534 the first object in SYMBOL_REF_BLOCK (RTX). The value is negative if
2535 RTX has not yet been assigned to a block, or it has not been given an
2536 offset within that block. */
2537 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
2539 /* True if RTX is flagged to be a scheduling barrier. */
2540 #define PREFETCH_SCHEDULE_BARRIER_P(RTX) \
2541 (RTL_FLAG_CHECK1 ("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
2543 /* Indicate whether the machine has any sort of auto increment addressing.
2544 If not, we can avoid checking for REG_INC notes. */
2546 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
2547 || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
2548 || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_POST_MODIFY_DISP) \
2549 || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
2550 #define AUTO_INC_DEC
2551 #endif
2553 /* Define a macro to look for REG_INC notes,
2554 but save time on machines where they never exist. */
2556 #ifdef AUTO_INC_DEC
2557 #define FIND_REG_INC_NOTE(INSN, REG) \
2558 ((REG) != NULL_RTX && REG_P ((REG)) \
2559 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \
2560 : find_reg_note ((INSN), REG_INC, (REG)))
2561 #else
2562 #define FIND_REG_INC_NOTE(INSN, REG) 0
2563 #endif
2565 #ifndef HAVE_PRE_INCREMENT
2566 #define HAVE_PRE_INCREMENT 0
2567 #endif
2569 #ifndef HAVE_PRE_DECREMENT
2570 #define HAVE_PRE_DECREMENT 0
2571 #endif
2573 #ifndef HAVE_POST_INCREMENT
2574 #define HAVE_POST_INCREMENT 0
2575 #endif
2577 #ifndef HAVE_POST_DECREMENT
2578 #define HAVE_POST_DECREMENT 0
2579 #endif
2581 #ifndef HAVE_POST_MODIFY_DISP
2582 #define HAVE_POST_MODIFY_DISP 0
2583 #endif
2585 #ifndef HAVE_POST_MODIFY_REG
2586 #define HAVE_POST_MODIFY_REG 0
2587 #endif
2589 #ifndef HAVE_PRE_MODIFY_DISP
2590 #define HAVE_PRE_MODIFY_DISP 0
2591 #endif
2593 #ifndef HAVE_PRE_MODIFY_REG
2594 #define HAVE_PRE_MODIFY_REG 0
2595 #endif
2598 /* Some architectures do not have complete pre/post increment/decrement
2599 instruction sets, or only move some modes efficiently. These macros
2600 allow us to tune autoincrement generation. */
2602 #ifndef USE_LOAD_POST_INCREMENT
2603 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
2604 #endif
2606 #ifndef USE_LOAD_POST_DECREMENT
2607 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
2608 #endif
2610 #ifndef USE_LOAD_PRE_INCREMENT
2611 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
2612 #endif
2614 #ifndef USE_LOAD_PRE_DECREMENT
2615 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
2616 #endif
2618 #ifndef USE_STORE_POST_INCREMENT
2619 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
2620 #endif
2622 #ifndef USE_STORE_POST_DECREMENT
2623 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
2624 #endif
2626 #ifndef USE_STORE_PRE_INCREMENT
2627 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
2628 #endif
2630 #ifndef USE_STORE_PRE_DECREMENT
2631 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
2632 #endif
2634 /* Nonzero when we are generating CONCATs. */
2635 extern int generating_concat_p;
2637 /* Nonzero when we are expanding trees to RTL. */
2638 extern int currently_expanding_to_rtl;
2640 /* Generally useful functions. */
2642 /* In explow.c */
2643 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, machine_mode);
2644 extern rtx plus_constant (machine_mode, rtx, HOST_WIDE_INT, bool = false);
2646 /* In rtl.c */
2647 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
2648 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
2649 extern rtx rtx_alloc_stat_v (RTX_CODE MEM_STAT_DECL, int);
2650 #define rtx_alloc_v(c, SZ) rtx_alloc_stat_v (c MEM_STAT_INFO, SZ)
2651 #define const_wide_int_alloc(NWORDS) \
2652 rtx_alloc_v (CONST_WIDE_INT, \
2653 (sizeof (struct hwivec_def) \
2654 + ((NWORDS)-1) * sizeof (HOST_WIDE_INT))) \
2656 extern rtvec rtvec_alloc (int);
2657 extern rtvec shallow_copy_rtvec (rtvec);
2658 extern bool shared_const_p (const_rtx);
2659 extern rtx copy_rtx (rtx);
2660 extern void dump_rtx_statistics (void);
2662 /* In emit-rtl.c */
2663 extern rtx copy_rtx_if_shared (rtx);
2665 /* In rtl.c */
2666 extern unsigned int rtx_size (const_rtx);
2667 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
2668 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
2669 extern int rtx_equal_p (const_rtx, const_rtx);
2671 /* In emit-rtl.c */
2672 extern rtvec gen_rtvec_v (int, rtx *);
2673 extern rtvec gen_rtvec_v (int, rtx_insn **);
2674 extern rtx gen_reg_rtx (machine_mode);
2675 extern rtx gen_rtx_REG_offset (rtx, machine_mode, unsigned int, int);
2676 extern rtx gen_reg_rtx_offset (rtx, machine_mode, int);
2677 extern rtx gen_reg_rtx_and_attrs (rtx);
2678 extern rtx_code_label *gen_label_rtx (void);
2679 extern rtx gen_lowpart_common (machine_mode, rtx);
2681 /* In cse.c */
2682 extern rtx gen_lowpart_if_possible (machine_mode, rtx);
2684 /* In emit-rtl.c */
2685 extern rtx gen_highpart (machine_mode, rtx);
2686 extern rtx gen_highpart_mode (machine_mode, machine_mode, rtx);
2687 extern rtx operand_subword (rtx, unsigned int, int, machine_mode);
2689 /* In emit-rtl.c */
2690 extern rtx operand_subword_force (rtx, unsigned int, machine_mode);
2691 extern bool paradoxical_subreg_p (const_rtx);
2692 extern int subreg_lowpart_p (const_rtx);
2693 extern unsigned int subreg_lowpart_offset (machine_mode,
2694 machine_mode);
2695 extern unsigned int subreg_highpart_offset (machine_mode,
2696 machine_mode);
2697 extern int byte_lowpart_offset (machine_mode, machine_mode);
2698 extern rtx make_safe_from (rtx, rtx);
2699 extern rtx convert_memory_address_addr_space (machine_mode, rtx,
2700 addr_space_t);
2701 #define convert_memory_address(to_mode,x) \
2702 convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
2703 extern const char *get_insn_name (int);
2704 extern rtx_insn *get_last_insn_anywhere (void);
2705 extern rtx_insn *get_first_nonnote_insn (void);
2706 extern rtx_insn *get_last_nonnote_insn (void);
2707 extern void start_sequence (void);
2708 extern void push_to_sequence (rtx_insn *);
2709 extern void push_to_sequence2 (rtx_insn *, rtx_insn *);
2710 extern void end_sequence (void);
2711 #if TARGET_SUPPORTS_WIDE_INT == 0
2712 extern double_int rtx_to_double_int (const_rtx);
2713 #endif
2714 extern void cwi_output_hex (FILE *, const_rtx);
2715 #ifndef GENERATOR_FILE
2716 extern rtx immed_wide_int_const (const wide_int_ref &, machine_mode);
2717 #endif
2718 #if TARGET_SUPPORTS_WIDE_INT == 0
2719 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
2720 machine_mode);
2721 #endif
2723 /* In loop-iv.c */
2725 extern rtx lowpart_subreg (machine_mode, rtx, machine_mode);
2727 /* In varasm.c */
2728 extern rtx force_const_mem (machine_mode, rtx);
2730 /* In varasm.c */
2732 struct function;
2733 extern rtx get_pool_constant (const_rtx);
2734 extern rtx get_pool_constant_mark (rtx, bool *);
2735 extern machine_mode get_pool_mode (const_rtx);
2736 extern rtx simplify_subtraction (rtx);
2737 extern void decide_function_section (tree);
2739 /* In emit-rtl.c */
2740 extern rtx_insn *emit_insn_before (rtx, rtx);
2741 extern rtx_insn *emit_insn_before_noloc (rtx, rtx_insn *, basic_block);
2742 extern rtx_insn *emit_insn_before_setloc (rtx, rtx_insn *, int);
2743 extern rtx_jump_insn *emit_jump_insn_before (rtx, rtx);
2744 extern rtx_jump_insn *emit_jump_insn_before_noloc (rtx, rtx_insn *);
2745 extern rtx_jump_insn *emit_jump_insn_before_setloc (rtx, rtx_insn *, int);
2746 extern rtx_insn *emit_call_insn_before (rtx, rtx_insn *);
2747 extern rtx_insn *emit_call_insn_before_noloc (rtx, rtx_insn *);
2748 extern rtx_insn *emit_call_insn_before_setloc (rtx, rtx_insn *, int);
2749 extern rtx_insn *emit_debug_insn_before (rtx, rtx_insn *);
2750 extern rtx_insn *emit_debug_insn_before_noloc (rtx, rtx);
2751 extern rtx_insn *emit_debug_insn_before_setloc (rtx, rtx, int);
2752 extern rtx_barrier *emit_barrier_before (rtx);
2753 extern rtx_code_label *emit_label_before (rtx, rtx_insn *);
2754 extern rtx_note *emit_note_before (enum insn_note, rtx_insn *);
2755 extern rtx_insn *emit_insn_after (rtx, rtx);
2756 extern rtx_insn *emit_insn_after_noloc (rtx, rtx, basic_block);
2757 extern rtx_insn *emit_insn_after_setloc (rtx, rtx, int);
2758 extern rtx_jump_insn *emit_jump_insn_after (rtx, rtx);
2759 extern rtx_jump_insn *emit_jump_insn_after_noloc (rtx, rtx);
2760 extern rtx_jump_insn *emit_jump_insn_after_setloc (rtx, rtx, int);
2761 extern rtx_insn *emit_call_insn_after (rtx, rtx);
2762 extern rtx_insn *emit_call_insn_after_noloc (rtx, rtx);
2763 extern rtx_insn *emit_call_insn_after_setloc (rtx, rtx, int);
2764 extern rtx_insn *emit_debug_insn_after (rtx, rtx);
2765 extern rtx_insn *emit_debug_insn_after_noloc (rtx, rtx);
2766 extern rtx_insn *emit_debug_insn_after_setloc (rtx, rtx, int);
2767 extern rtx_barrier *emit_barrier_after (rtx);
2768 extern rtx_insn *emit_label_after (rtx, rtx_insn *);
2769 extern rtx_note *emit_note_after (enum insn_note, rtx_insn *);
2770 extern rtx_insn *emit_insn (rtx);
2771 extern rtx_insn *emit_debug_insn (rtx);
2772 extern rtx_insn *emit_jump_insn (rtx);
2773 extern rtx_insn *emit_call_insn (rtx);
2774 extern rtx_code_label *emit_label (rtx);
2775 extern rtx_jump_table_data *emit_jump_table_data (rtx);
2776 extern rtx_barrier *emit_barrier (void);
2777 extern rtx_note *emit_note (enum insn_note);
2778 extern rtx_note *emit_note_copy (rtx_note *);
2779 extern rtx_insn *gen_clobber (rtx);
2780 extern rtx_insn *emit_clobber (rtx);
2781 extern rtx_insn *gen_use (rtx);
2782 extern rtx_insn *emit_use (rtx);
2783 extern rtx_insn *make_insn_raw (rtx);
2784 extern void add_function_usage_to (rtx, rtx);
2785 extern rtx_call_insn *last_call_insn (void);
2786 extern rtx_insn *previous_insn (rtx_insn *);
2787 extern rtx_insn *next_insn (rtx_insn *);
2788 extern rtx_insn *prev_nonnote_insn (rtx);
2789 extern rtx_insn *prev_nonnote_insn_bb (rtx);
2790 extern rtx_insn *next_nonnote_insn (rtx);
2791 extern rtx_insn *next_nonnote_insn_bb (rtx_insn *);
2792 extern rtx_insn *prev_nondebug_insn (rtx);
2793 extern rtx_insn *next_nondebug_insn (rtx);
2794 extern rtx_insn *prev_nonnote_nondebug_insn (rtx);
2795 extern rtx_insn *next_nonnote_nondebug_insn (rtx);
2796 extern rtx_insn *prev_real_insn (rtx);
2797 extern rtx_insn *next_real_insn (rtx);
2798 extern rtx_insn *prev_active_insn (rtx);
2799 extern rtx_insn *next_active_insn (rtx);
2800 extern int active_insn_p (const_rtx);
2801 extern rtx_insn *next_cc0_user (rtx);
2802 extern rtx_insn *prev_cc0_setter (rtx_insn *);
2804 /* In emit-rtl.c */
2805 extern int insn_line (const rtx_insn *);
2806 extern const char * insn_file (const rtx_insn *);
2807 extern tree insn_scope (const rtx_insn *);
2808 extern expanded_location insn_location (const rtx_insn *);
2809 extern location_t prologue_location, epilogue_location;
2811 /* In jump.c */
2812 extern enum rtx_code reverse_condition (enum rtx_code);
2813 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
2814 extern enum rtx_code swap_condition (enum rtx_code);
2815 extern enum rtx_code unsigned_condition (enum rtx_code);
2816 extern enum rtx_code signed_condition (enum rtx_code);
2817 extern void mark_jump_label (rtx, rtx_insn *, int);
2819 /* In jump.c */
2820 extern rtx_insn *delete_related_insns (rtx);
2822 /* In recog.c */
2823 extern rtx *find_constant_term_loc (rtx *);
2825 /* In emit-rtl.c */
2826 extern rtx_insn *try_split (rtx, rtx, int);
2827 extern int split_branch_probability;
2829 /* In unknown file */
2830 extern rtx split_insns (rtx, rtx);
2832 /* In simplify-rtx.c */
2833 extern rtx simplify_const_unary_operation (enum rtx_code, machine_mode,
2834 rtx, machine_mode);
2835 extern rtx simplify_unary_operation (enum rtx_code, machine_mode, rtx,
2836 machine_mode);
2837 extern rtx simplify_const_binary_operation (enum rtx_code, machine_mode,
2838 rtx, rtx);
2839 extern rtx simplify_binary_operation (enum rtx_code, machine_mode, rtx,
2840 rtx);
2841 extern rtx simplify_ternary_operation (enum rtx_code, machine_mode,
2842 machine_mode, rtx, rtx, rtx);
2843 extern rtx simplify_const_relational_operation (enum rtx_code,
2844 machine_mode, rtx, rtx);
2845 extern rtx simplify_relational_operation (enum rtx_code, machine_mode,
2846 machine_mode, rtx, rtx);
2847 extern rtx simplify_gen_binary (enum rtx_code, machine_mode, rtx, rtx);
2848 extern rtx simplify_gen_unary (enum rtx_code, machine_mode, rtx,
2849 machine_mode);
2850 extern rtx simplify_gen_ternary (enum rtx_code, machine_mode,
2851 machine_mode, rtx, rtx, rtx);
2852 extern rtx simplify_gen_relational (enum rtx_code, machine_mode,
2853 machine_mode, rtx, rtx);
2854 extern rtx simplify_subreg (machine_mode, rtx, machine_mode,
2855 unsigned int);
2856 extern rtx simplify_gen_subreg (machine_mode, rtx, machine_mode,
2857 unsigned int);
2858 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
2859 rtx (*fn) (rtx, const_rtx, void *), void *);
2860 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
2861 extern rtx simplify_rtx (const_rtx);
2862 extern rtx avoid_constant_pool_reference (rtx);
2863 extern rtx delegitimize_mem_from_attrs (rtx);
2864 extern bool mode_signbit_p (machine_mode, const_rtx);
2865 extern bool val_signbit_p (machine_mode, unsigned HOST_WIDE_INT);
2866 extern bool val_signbit_known_set_p (machine_mode,
2867 unsigned HOST_WIDE_INT);
2868 extern bool val_signbit_known_clear_p (machine_mode,
2869 unsigned HOST_WIDE_INT);
2871 /* In reginfo.c */
2872 extern machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
2873 bool);
2874 #ifdef HARD_CONST
2875 extern const HARD_REG_SET &simplifiable_subregs (const subreg_shape &);
2876 #endif
2878 /* In emit-rtl.c */
2879 extern rtx set_for_reg_notes (rtx);
2880 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
2881 extern rtx set_dst_reg_note (rtx, enum reg_note, rtx, rtx);
2882 extern void set_insn_deleted (rtx);
2884 /* Functions in rtlanal.c */
2886 extern rtx single_set_2 (const rtx_insn *, const_rtx);
2888 /* Handle the cheap and common cases inline for performance. */
2890 inline rtx single_set (const rtx_insn *insn)
2892 if (!INSN_P (insn))
2893 return NULL_RTX;
2895 if (GET_CODE (PATTERN (insn)) == SET)
2896 return PATTERN (insn);
2898 /* Defer to the more expensive case. */
2899 return single_set_2 (insn, PATTERN (insn));
2902 extern machine_mode get_address_mode (rtx mem);
2903 extern int rtx_addr_can_trap_p (const_rtx);
2904 extern bool nonzero_address_p (const_rtx);
2905 extern int rtx_unstable_p (const_rtx);
2906 extern bool rtx_varies_p (const_rtx, bool);
2907 extern bool rtx_addr_varies_p (const_rtx, bool);
2908 extern rtx get_call_rtx_from (rtx);
2909 extern HOST_WIDE_INT get_integer_term (const_rtx);
2910 extern rtx get_related_value (const_rtx);
2911 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
2912 extern void split_const (rtx, rtx *, rtx *);
2913 extern bool unsigned_reg_p (rtx);
2914 extern int reg_mentioned_p (const_rtx, const_rtx);
2915 extern int count_occurrences (const_rtx, const_rtx, int);
2916 extern int reg_referenced_p (const_rtx, const_rtx);
2917 extern int reg_used_between_p (const_rtx, const rtx_insn *, const rtx_insn *);
2918 extern int reg_set_between_p (const_rtx, const rtx_insn *, const rtx_insn *);
2919 extern int commutative_operand_precedence (rtx);
2920 extern bool swap_commutative_operands_p (rtx, rtx);
2921 extern int modified_between_p (const_rtx, const rtx_insn *, const rtx_insn *);
2922 extern int no_labels_between_p (const rtx_insn *, const rtx_insn *);
2923 extern int modified_in_p (const_rtx, const_rtx);
2924 extern int reg_set_p (const_rtx, const_rtx);
2925 extern int multiple_sets (const_rtx);
2926 extern int set_noop_p (const_rtx);
2927 extern int noop_move_p (const rtx_insn *);
2928 extern bool refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
2929 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
2930 extern const_rtx set_of (const_rtx, const_rtx);
2931 extern void record_hard_reg_sets (rtx, const_rtx, void *);
2932 extern void record_hard_reg_uses (rtx *, void *);
2933 #ifdef HARD_CONST
2934 extern void find_all_hard_regs (const_rtx, HARD_REG_SET *);
2935 extern void find_all_hard_reg_sets (const rtx_insn *, HARD_REG_SET *, bool);
2936 #endif
2937 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
2938 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
2939 extern int dead_or_set_p (const_rtx, const_rtx);
2940 extern int dead_or_set_regno_p (const_rtx, unsigned int);
2941 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
2942 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
2943 extern rtx find_reg_equal_equiv_note (const_rtx);
2944 extern rtx find_constant_src (const rtx_insn *);
2945 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
2946 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
2947 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
2948 extern void add_reg_note (rtx, enum reg_note, rtx);
2949 extern void add_int_reg_note (rtx, enum reg_note, int);
2950 extern void add_shallow_copy_of_reg_note (rtx_insn *, rtx);
2951 extern void remove_note (rtx, const_rtx);
2952 extern void remove_reg_equal_equiv_notes (rtx_insn *);
2953 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
2954 extern int side_effects_p (const_rtx);
2955 extern int volatile_refs_p (const_rtx);
2956 extern int volatile_insn_p (const_rtx);
2957 extern int may_trap_p_1 (const_rtx, unsigned);
2958 extern int may_trap_p (const_rtx);
2959 extern int may_trap_or_fault_p (const_rtx);
2960 extern bool can_throw_internal (const_rtx);
2961 extern bool can_throw_external (const_rtx);
2962 extern bool insn_could_throw_p (const_rtx);
2963 extern bool insn_nothrow_p (const_rtx);
2964 extern bool can_nonlocal_goto (const rtx_insn *);
2965 extern void copy_reg_eh_region_note_forward (rtx, rtx_insn *, rtx);
2966 extern void copy_reg_eh_region_note_backward (rtx, rtx_insn *, rtx);
2967 extern int inequality_comparisons_p (const_rtx);
2968 extern rtx replace_rtx (rtx, rtx, rtx);
2969 extern void replace_label (rtx *, rtx, rtx, bool);
2970 extern void replace_label_in_insn (rtx_insn *, rtx, rtx, bool);
2971 extern bool rtx_referenced_p (const_rtx, const_rtx);
2972 extern bool tablejump_p (const rtx_insn *, rtx *, rtx_jump_table_data **);
2973 extern int computed_jump_p (const rtx_insn *);
2974 extern bool tls_referenced_p (const_rtx);
2976 /* Overload for refers_to_regno_p for checking a single register. */
2977 inline bool
2978 refers_to_regno_p (unsigned int regnum, const_rtx x, rtx* loc = NULL)
2980 return refers_to_regno_p (regnum, regnum + 1, x, loc);
2983 /* Callback for for_each_inc_dec, to process the autoinc operation OP
2984 within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is
2985 NULL. The callback is passed the same opaque ARG passed to
2986 for_each_inc_dec. Return zero to continue looking for other
2987 autoinc operations or any other value to interrupt the traversal and
2988 return that value to the caller of for_each_inc_dec. */
2989 typedef int (*for_each_inc_dec_fn) (rtx mem, rtx op, rtx dest, rtx src,
2990 rtx srcoff, void *arg);
2991 extern int for_each_inc_dec (rtx, for_each_inc_dec_fn, void *arg);
2993 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
2994 rtx *, rtx *);
2995 extern int rtx_equal_p_cb (const_rtx, const_rtx,
2996 rtx_equal_p_callback_function);
2998 typedef int (*hash_rtx_callback_function) (const_rtx, machine_mode, rtx *,
2999 machine_mode *);
3000 extern unsigned hash_rtx_cb (const_rtx, machine_mode, int *, int *,
3001 bool, hash_rtx_callback_function);
3003 extern rtx regno_use_in (unsigned int, rtx);
3004 extern int auto_inc_p (const_rtx);
3005 extern bool in_insn_list_p (const rtx_insn_list *, const rtx_insn *);
3006 extern void remove_node_from_expr_list (const_rtx, rtx_expr_list **);
3007 extern void remove_node_from_insn_list (const rtx_insn *, rtx_insn_list **);
3008 extern int loc_mentioned_in_p (rtx *, const_rtx);
3009 extern rtx_insn *find_first_parameter_load (rtx_insn *, rtx_insn *);
3010 extern bool keep_with_call_p (const rtx_insn *);
3011 extern bool label_is_jump_target_p (const_rtx, const rtx_insn *);
3012 extern int insn_rtx_cost (rtx, bool);
3013 extern unsigned seq_cost (const rtx_insn *, bool);
3015 /* Given an insn and condition, return a canonical description of
3016 the test being made. */
3017 extern rtx canonicalize_condition (rtx_insn *, rtx, int, rtx_insn **, rtx,
3018 int, int);
3020 /* Given a JUMP_INSN, return a canonical description of the test
3021 being made. */
3022 extern rtx get_condition (rtx_insn *, rtx_insn **, int, int);
3024 /* Information about a subreg of a hard register. */
3025 struct subreg_info
3027 /* Offset of first hard register involved in the subreg. */
3028 int offset;
3029 /* Number of hard registers involved in the subreg. In the case of
3030 a paradoxical subreg, this is the number of registers that would
3031 be modified by writing to the subreg; some of them may be don't-care
3032 when reading from the subreg. */
3033 int nregs;
3034 /* Whether this subreg can be represented as a hard reg with the new
3035 mode (by adding OFFSET to the original hard register). */
3036 bool representable_p;
3039 extern void subreg_get_info (unsigned int, machine_mode,
3040 unsigned int, machine_mode,
3041 struct subreg_info *);
3043 /* lists.c */
3045 extern void free_EXPR_LIST_list (rtx_expr_list **);
3046 extern void free_INSN_LIST_list (rtx_insn_list **);
3047 extern void free_EXPR_LIST_node (rtx);
3048 extern void free_INSN_LIST_node (rtx);
3049 extern rtx_insn_list *alloc_INSN_LIST (rtx, rtx);
3050 extern rtx_insn_list *copy_INSN_LIST (rtx_insn_list *);
3051 extern rtx_insn_list *concat_INSN_LIST (rtx_insn_list *, rtx_insn_list *);
3052 extern rtx_expr_list *alloc_EXPR_LIST (int, rtx, rtx);
3053 extern void remove_free_INSN_LIST_elem (rtx_insn *, rtx_insn_list **);
3054 extern rtx remove_list_elem (rtx, rtx *);
3055 extern rtx_insn *remove_free_INSN_LIST_node (rtx_insn_list **);
3056 extern rtx remove_free_EXPR_LIST_node (rtx_expr_list **);
3059 /* reginfo.c */
3061 /* Resize reg info. */
3062 extern bool resize_reg_info (void);
3063 /* Free up register info memory. */
3064 extern void free_reg_info (void);
3065 extern void init_subregs_of_mode (void);
3066 extern void finish_subregs_of_mode (void);
3068 /* recog.c */
3069 extern rtx extract_asm_operands (rtx);
3070 extern int asm_noperands (const_rtx);
3071 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
3072 machine_mode *, location_t *);
3073 extern void get_referenced_operands (const char *, bool *, unsigned int);
3075 extern enum reg_class reg_preferred_class (int);
3076 extern enum reg_class reg_alternate_class (int);
3077 extern enum reg_class reg_allocno_class (int);
3078 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
3079 enum reg_class);
3081 extern void split_all_insns (void);
3082 extern unsigned int split_all_insns_noflow (void);
3084 #define MAX_SAVED_CONST_INT 64
3085 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
3087 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT])
3088 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1])
3089 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2])
3090 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1])
3091 extern GTY(()) rtx const_true_rtx;
3093 extern GTY(()) rtx const_tiny_rtx[4][(int) MAX_MACHINE_MODE];
3095 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
3096 same as VOIDmode. */
3098 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
3100 /* Likewise, for the constants 1 and 2 and -1. */
3102 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
3103 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
3104 #define CONSTM1_RTX(MODE) (const_tiny_rtx[3][(int) (MODE)])
3106 extern GTY(()) rtx pc_rtx;
3107 extern GTY(()) rtx cc0_rtx;
3108 extern GTY(()) rtx ret_rtx;
3109 extern GTY(()) rtx simple_return_rtx;
3110 extern GTY(()) rtx_insn *invalid_insn_rtx;
3112 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
3113 is used to represent the frame pointer. This is because the
3114 hard frame pointer and the automatic variables are separated by an amount
3115 that cannot be determined until after register allocation. We can assume
3116 that in this case ELIMINABLE_REGS will be defined, one action of which
3117 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
3118 #ifndef HARD_FRAME_POINTER_REGNUM
3119 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
3120 #endif
3122 #ifndef HARD_FRAME_POINTER_IS_FRAME_POINTER
3123 #define HARD_FRAME_POINTER_IS_FRAME_POINTER \
3124 (HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM)
3125 #endif
3127 #ifndef HARD_FRAME_POINTER_IS_ARG_POINTER
3128 #define HARD_FRAME_POINTER_IS_ARG_POINTER \
3129 (HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM)
3130 #endif
3132 /* Index labels for global_rtl. */
3133 enum global_rtl_index
3135 GR_STACK_POINTER,
3136 GR_FRAME_POINTER,
3137 /* For register elimination to work properly these hard_frame_pointer_rtx,
3138 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
3139 the same register. */
3140 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
3141 GR_ARG_POINTER = GR_FRAME_POINTER,
3142 #endif
3143 #if HARD_FRAME_POINTER_IS_FRAME_POINTER
3144 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
3145 #else
3146 GR_HARD_FRAME_POINTER,
3147 #endif
3148 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
3149 #if HARD_FRAME_POINTER_IS_ARG_POINTER
3150 GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
3151 #else
3152 GR_ARG_POINTER,
3153 #endif
3154 #endif
3155 GR_VIRTUAL_INCOMING_ARGS,
3156 GR_VIRTUAL_STACK_ARGS,
3157 GR_VIRTUAL_STACK_DYNAMIC,
3158 GR_VIRTUAL_OUTGOING_ARGS,
3159 GR_VIRTUAL_CFA,
3160 GR_VIRTUAL_PREFERRED_STACK_BOUNDARY,
3162 GR_MAX
3165 /* Target-dependent globals. */
3166 struct GTY(()) target_rtl {
3167 /* All references to the hard registers in global_rtl_index go through
3168 these unique rtl objects. On machines where the frame-pointer and
3169 arg-pointer are the same register, they use the same unique object.
3171 After register allocation, other rtl objects which used to be pseudo-regs
3172 may be clobbered to refer to the frame-pointer register.
3173 But references that were originally to the frame-pointer can be
3174 distinguished from the others because they contain frame_pointer_rtx.
3176 When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
3177 tricky: until register elimination has taken place hard_frame_pointer_rtx
3178 should be used if it is being set, and frame_pointer_rtx otherwise. After
3179 register elimination hard_frame_pointer_rtx should always be used.
3180 On machines where the two registers are same (most) then these are the
3181 same. */
3182 rtx x_global_rtl[GR_MAX];
3184 /* A unique representation of (REG:Pmode PIC_OFFSET_TABLE_REGNUM). */
3185 rtx x_pic_offset_table_rtx;
3187 /* A unique representation of (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM).
3188 This is used to implement __builtin_return_address for some machines;
3189 see for instance the MIPS port. */
3190 rtx x_return_address_pointer_rtx;
3192 /* Commonly used RTL for hard registers. These objects are not
3193 necessarily unique, so we allocate them separately from global_rtl.
3194 They are initialized once per compilation unit, then copied into
3195 regno_reg_rtx at the beginning of each function. */
3196 rtx x_initial_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
3198 /* A sample (mem:M stack_pointer_rtx) rtx for each mode M. */
3199 rtx x_top_of_stack[MAX_MACHINE_MODE];
3201 /* Static hunks of RTL used by the aliasing code; these are treated
3202 as persistent to avoid unnecessary RTL allocations. */
3203 rtx x_static_reg_base_value[FIRST_PSEUDO_REGISTER];
3205 /* The default memory attributes for each mode. */
3206 struct mem_attrs *x_mode_mem_attrs[(int) MAX_MACHINE_MODE];
3208 /* Track if RTL has been initialized. */
3209 bool target_specific_initialized;
3212 extern GTY(()) struct target_rtl default_target_rtl;
3213 #if SWITCHABLE_TARGET
3214 extern struct target_rtl *this_target_rtl;
3215 #else
3216 #define this_target_rtl (&default_target_rtl)
3217 #endif
3219 #define global_rtl \
3220 (this_target_rtl->x_global_rtl)
3221 #define pic_offset_table_rtx \
3222 (this_target_rtl->x_pic_offset_table_rtx)
3223 #define return_address_pointer_rtx \
3224 (this_target_rtl->x_return_address_pointer_rtx)
3225 #define top_of_stack \
3226 (this_target_rtl->x_top_of_stack)
3227 #define mode_mem_attrs \
3228 (this_target_rtl->x_mode_mem_attrs)
3230 /* All references to certain hard regs, except those created
3231 by allocating pseudo regs into them (when that's possible),
3232 go through these unique rtx objects. */
3233 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER])
3234 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER])
3235 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER])
3236 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER])
3238 #ifndef GENERATOR_FILE
3239 /* Return the attributes of a MEM rtx. */
3240 static inline struct mem_attrs *
3241 get_mem_attrs (const_rtx x)
3243 struct mem_attrs *attrs;
3245 attrs = MEM_ATTRS (x);
3246 if (!attrs)
3247 attrs = mode_mem_attrs[(int) GET_MODE (x)];
3248 return attrs;
3250 #endif
3252 /* Include the RTL generation functions. */
3254 #ifndef GENERATOR_FILE
3255 #include "genrtl.h"
3256 #undef gen_rtx_ASM_INPUT
3257 #define gen_rtx_ASM_INPUT(MODE, ARG0) \
3258 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
3259 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC) \
3260 gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
3261 #endif
3263 /* There are some RTL codes that require special attention; the
3264 generation functions included above do the raw handling. If you
3265 add to this list, modify special_rtx in gengenrtl.c as well. */
3267 extern rtx_expr_list *gen_rtx_EXPR_LIST (machine_mode, rtx, rtx);
3268 extern rtx_insn_list *gen_rtx_INSN_LIST (machine_mode, rtx, rtx);
3269 extern rtx_insn *
3270 gen_rtx_INSN (machine_mode mode, rtx_insn *prev_insn, rtx_insn *next_insn,
3271 basic_block bb, rtx pattern, int location, int code,
3272 rtx reg_notes);
3273 extern rtx gen_rtx_CONST_INT (machine_mode, HOST_WIDE_INT);
3274 extern rtx gen_rtx_CONST_VECTOR (machine_mode, rtvec);
3275 extern void set_mode_and_regno (rtx, machine_mode, unsigned int);
3276 extern rtx gen_raw_REG (machine_mode, unsigned int);
3277 extern rtx gen_rtx_REG (machine_mode, unsigned int);
3278 extern rtx gen_rtx_SUBREG (machine_mode, rtx, int);
3279 extern rtx gen_rtx_MEM (machine_mode, rtx);
3280 extern rtx gen_rtx_VAR_LOCATION (machine_mode, tree, rtx,
3281 enum var_init_status);
3283 #ifdef GENERATOR_FILE
3284 #define PUT_MODE(RTX, MODE) PUT_MODE_RAW (RTX, MODE)
3285 #else
3286 static inline void
3287 PUT_MODE (rtx x, machine_mode mode)
3289 if (REG_P (x))
3290 set_mode_and_regno (x, mode, REGNO (x));
3291 else
3292 PUT_MODE_RAW (x, mode);
3294 #endif
3296 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N))
3298 /* Virtual registers are used during RTL generation to refer to locations into
3299 the stack frame when the actual location isn't known until RTL generation
3300 is complete. The routine instantiate_virtual_regs replaces these with
3301 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
3302 a constant. */
3304 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
3306 /* This points to the first word of the incoming arguments passed on the stack,
3307 either by the caller or by the callee when pretending it was passed by the
3308 caller. */
3310 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
3312 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
3314 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
3315 variable on the stack. Otherwise, it points to the first variable on
3316 the stack. */
3318 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS])
3320 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
3322 /* This points to the location of dynamically-allocated memory on the stack
3323 immediately after the stack pointer has been adjusted by the amount
3324 desired. */
3326 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
3328 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
3330 /* This points to the location in the stack at which outgoing arguments should
3331 be written when the stack is pre-pushed (arguments pushed using push
3332 insns always use sp). */
3334 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
3336 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
3338 /* This points to the Canonical Frame Address of the function. This
3339 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
3340 but is calculated relative to the arg pointer for simplicity; the
3341 frame pointer nor stack pointer are necessarily fixed relative to
3342 the CFA until after reload. */
3344 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA])
3346 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
3348 #define LAST_VIRTUAL_POINTER_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
3350 /* This is replaced by crtl->preferred_stack_boundary / BITS_PER_UNIT
3351 when finalized. */
3353 #define virtual_preferred_stack_boundary_rtx \
3354 (global_rtl[GR_VIRTUAL_PREFERRED_STACK_BOUNDARY])
3356 #define VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM \
3357 ((FIRST_VIRTUAL_REGISTER) + 5)
3359 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 5)
3361 /* Nonzero if REGNUM is a pointer into the stack frame. */
3362 #define REGNO_PTR_FRAME_P(REGNUM) \
3363 ((REGNUM) == STACK_POINTER_REGNUM \
3364 || (REGNUM) == FRAME_POINTER_REGNUM \
3365 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \
3366 || (REGNUM) == ARG_POINTER_REGNUM \
3367 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \
3368 && (REGNUM) <= LAST_VIRTUAL_POINTER_REGISTER))
3370 /* REGNUM never really appearing in the INSN stream. */
3371 #define INVALID_REGNUM (~(unsigned int) 0)
3373 /* REGNUM for which no debug information can be generated. */
3374 #define IGNORED_DWARF_REGNUM (INVALID_REGNUM - 1)
3376 extern rtx output_constant_def (tree, int);
3377 extern rtx lookup_constant_def (tree);
3379 /* Nonzero after end of reload pass.
3380 Set to 1 or 0 by reload1.c. */
3382 extern int reload_completed;
3384 /* Nonzero after thread_prologue_and_epilogue_insns has run. */
3385 extern int epilogue_completed;
3387 /* Set to 1 while reload_as_needed is operating.
3388 Required by some machines to handle any generated moves differently. */
3390 extern int reload_in_progress;
3392 /* Set to 1 while in lra. */
3393 extern int lra_in_progress;
3395 /* This macro indicates whether you may create a new
3396 pseudo-register. */
3398 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
3400 #ifdef STACK_REGS
3401 /* Nonzero after end of regstack pass.
3402 Set to 1 or 0 by reg-stack.c. */
3403 extern int regstack_completed;
3404 #endif
3406 /* If this is nonzero, we do not bother generating VOLATILE
3407 around volatile memory references, and we are willing to
3408 output indirect addresses. If cse is to follow, we reject
3409 indirect addresses so a useful potential cse is generated;
3410 if it is used only once, instruction combination will produce
3411 the same indirect address eventually. */
3412 extern int cse_not_expected;
3414 /* Translates rtx code to tree code, for those codes needed by
3415 REAL_ARITHMETIC. The function returns an int because the caller may not
3416 know what `enum tree_code' means. */
3418 extern int rtx_to_tree_code (enum rtx_code);
3420 /* In cse.c */
3421 extern int delete_trivially_dead_insns (rtx_insn *, int);
3422 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
3423 extern unsigned hash_rtx (const_rtx x, machine_mode, int *, int *, bool);
3425 /* In dse.c */
3426 extern bool check_for_inc_dec (rtx_insn *insn);
3428 /* In jump.c */
3429 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
3430 extern bool jump_to_label_p (const rtx_insn *);
3431 extern int condjump_p (const rtx_insn *);
3432 extern int any_condjump_p (const rtx_insn *);
3433 extern int any_uncondjump_p (const rtx_insn *);
3434 extern rtx pc_set (const rtx_insn *);
3435 extern rtx condjump_label (const rtx_insn *);
3436 extern int simplejump_p (const rtx_insn *);
3437 extern int returnjump_p (const rtx_insn *);
3438 extern int eh_returnjump_p (rtx_insn *);
3439 extern int onlyjump_p (const rtx_insn *);
3440 extern int only_sets_cc0_p (const_rtx);
3441 extern int sets_cc0_p (const_rtx);
3442 extern int invert_jump_1 (rtx_jump_insn *, rtx);
3443 extern int invert_jump (rtx_jump_insn *, rtx, int);
3444 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
3445 extern int true_regnum (const_rtx);
3446 extern unsigned int reg_or_subregno (const_rtx);
3447 extern int redirect_jump_1 (rtx_insn *, rtx);
3448 extern void redirect_jump_2 (rtx_jump_insn *, rtx, rtx, int, int);
3449 extern int redirect_jump (rtx_jump_insn *, rtx, int);
3450 extern void rebuild_jump_labels (rtx_insn *);
3451 extern void rebuild_jump_labels_chain (rtx_insn *);
3452 extern rtx reversed_comparison (const_rtx, machine_mode);
3453 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
3454 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
3455 const_rtx, const_rtx);
3456 extern void delete_for_peephole (rtx_insn *, rtx_insn *);
3457 extern int condjump_in_parallel_p (const rtx_insn *);
3459 /* In emit-rtl.c. */
3460 extern int max_reg_num (void);
3461 extern int max_label_num (void);
3462 extern int get_first_label_num (void);
3463 extern void maybe_set_first_label_num (rtx);
3464 extern void delete_insns_since (rtx_insn *);
3465 extern void mark_reg_pointer (rtx, int);
3466 extern void mark_user_reg (rtx);
3467 extern void reset_used_flags (rtx);
3468 extern void set_used_flags (rtx);
3469 extern void reorder_insns (rtx_insn *, rtx_insn *, rtx_insn *);
3470 extern void reorder_insns_nobb (rtx_insn *, rtx_insn *, rtx_insn *);
3471 extern int get_max_insn_count (void);
3472 extern int in_sequence_p (void);
3473 extern void init_emit (void);
3474 extern void init_emit_regs (void);
3475 extern void init_derived_machine_modes (void);
3476 extern void init_emit_once (void);
3477 extern void push_topmost_sequence (void);
3478 extern void pop_topmost_sequence (void);
3479 extern void set_new_first_and_last_insn (rtx_insn *, rtx_insn *);
3480 extern unsigned int unshare_all_rtl (void);
3481 extern void unshare_all_rtl_again (rtx_insn *);
3482 extern void unshare_all_rtl_in_chain (rtx_insn *);
3483 extern void verify_rtl_sharing (void);
3484 extern void add_insn (rtx_insn *);
3485 extern void add_insn_before (rtx, rtx, basic_block);
3486 extern void add_insn_after (rtx, rtx, basic_block);
3487 extern void remove_insn (rtx);
3488 extern rtx_insn *emit (rtx);
3489 extern void emit_insn_at_entry (rtx);
3490 extern rtx gen_lowpart_SUBREG (machine_mode, rtx);
3491 extern rtx gen_const_mem (machine_mode, rtx);
3492 extern rtx gen_frame_mem (machine_mode, rtx);
3493 extern rtx gen_tmp_stack_mem (machine_mode, rtx);
3494 extern bool validate_subreg (machine_mode, machine_mode,
3495 const_rtx, unsigned int);
3497 /* In combine.c */
3498 extern unsigned int extended_count (const_rtx, machine_mode, int);
3499 extern rtx remove_death (unsigned int, rtx_insn *);
3500 extern void dump_combine_stats (FILE *);
3501 extern void dump_combine_total_stats (FILE *);
3502 extern rtx make_compound_operation (rtx, enum rtx_code);
3504 /* In sched-rgn.c. */
3505 extern void schedule_insns (void);
3507 /* In sched-ebb.c. */
3508 extern void schedule_ebbs (void);
3510 /* In sel-sched-dump.c. */
3511 extern void sel_sched_fix_param (const char *param, const char *val);
3513 /* In print-rtl.c */
3514 extern const char *print_rtx_head;
3515 extern void debug (const rtx_def &ref);
3516 extern void debug (const rtx_def *ptr);
3517 extern void debug_rtx (const_rtx);
3518 extern void debug_rtx_list (const rtx_insn *, int);
3519 extern void debug_rtx_range (const rtx_insn *, const rtx_insn *);
3520 extern const_rtx debug_rtx_find (const rtx_insn *, int);
3521 extern void print_mem_expr (FILE *, const_tree);
3522 extern void print_rtl (FILE *, const_rtx);
3523 extern void print_simple_rtl (FILE *, const_rtx);
3524 extern int print_rtl_single (FILE *, const_rtx);
3525 extern int print_rtl_single_with_indent (FILE *, const_rtx, int);
3526 extern void print_inline_rtx (FILE *, const_rtx, int);
3528 /* Functions in sched-vis.c. FIXME: Ideally these functions would
3529 not be in sched-vis.c but in rtl.c, because they are not only used
3530 by the scheduler anymore but for all "slim" RTL dumping. */
3531 extern void dump_value_slim (FILE *, const_rtx, int);
3532 extern void dump_insn_slim (FILE *, const rtx_insn *);
3533 extern void dump_rtl_slim (FILE *, const rtx_insn *, const rtx_insn *,
3534 int, int);
3535 extern void print_value (pretty_printer *, const_rtx, int);
3536 extern void print_pattern (pretty_printer *, const_rtx, int);
3537 extern void print_insn (pretty_printer *, const_rtx, int);
3538 extern void rtl_dump_bb_for_graph (pretty_printer *, basic_block);
3539 extern const char *str_pattern_slim (const_rtx);
3541 /* In stmt.c */
3542 extern void expand_null_return (void);
3543 extern void expand_naked_return (void);
3544 extern void emit_jump (rtx);
3546 /* In expr.c */
3547 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
3548 unsigned int, int);
3549 extern HOST_WIDE_INT find_args_size_adjust (rtx_insn *);
3550 extern int fixup_args_size_notes (rtx_insn *, rtx_insn *, int);
3552 /* In expmed.c */
3553 extern void init_expmed (void);
3554 extern void expand_inc (rtx, rtx);
3555 extern void expand_dec (rtx, rtx);
3557 /* In lower-subreg.c */
3558 extern void init_lower_subreg (void);
3560 /* In gcse.c */
3561 extern bool can_copy_p (machine_mode);
3562 extern bool can_assign_to_reg_without_clobbers_p (rtx);
3563 extern rtx fis_get_condition (rtx_insn *);
3565 /* In ira.c */
3566 #ifdef HARD_CONST
3567 extern HARD_REG_SET eliminable_regset;
3568 #endif
3569 extern void mark_elimination (int, int);
3571 /* In reginfo.c */
3572 extern int reg_classes_intersect_p (reg_class_t, reg_class_t);
3573 extern int reg_class_subset_p (reg_class_t, reg_class_t);
3574 extern void globalize_reg (tree, int);
3575 extern void init_reg_modes_target (void);
3576 extern void init_regs (void);
3577 extern void reinit_regs (void);
3578 extern void init_fake_stack_mems (void);
3579 extern void save_register_info (void);
3580 extern void init_reg_sets (void);
3581 extern void regclass (rtx, int);
3582 extern void reg_scan (rtx_insn *, unsigned int);
3583 extern void fix_register (const char *, int, int);
3584 #ifdef HARD_CONST
3585 extern const HARD_REG_SET *valid_mode_changes_for_regno (unsigned int);
3586 #endif
3588 /* In reload1.c */
3589 extern int function_invariant_p (const_rtx);
3591 /* In calls.c */
3592 enum libcall_type
3594 LCT_NORMAL = 0,
3595 LCT_CONST = 1,
3596 LCT_PURE = 2,
3597 LCT_NORETURN = 3,
3598 LCT_THROW = 4,
3599 LCT_RETURNS_TWICE = 5
3602 extern void emit_library_call (rtx, enum libcall_type, machine_mode, int,
3603 ...);
3604 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
3605 machine_mode, int, ...);
3607 /* In varasm.c */
3608 extern void init_varasm_once (void);
3610 extern rtx make_debug_expr_from_rtl (const_rtx);
3612 /* In read-rtl.c */
3613 extern bool read_rtx (const char *, rtx *);
3615 /* In alias.c */
3616 extern rtx canon_rtx (rtx);
3617 extern int true_dependence (const_rtx, machine_mode, const_rtx);
3618 extern rtx get_addr (rtx);
3619 extern int canon_true_dependence (const_rtx, machine_mode, rtx,
3620 const_rtx, rtx);
3621 extern int read_dependence (const_rtx, const_rtx);
3622 extern int anti_dependence (const_rtx, const_rtx);
3623 extern int canon_anti_dependence (const_rtx, bool,
3624 const_rtx, machine_mode, rtx);
3625 extern int output_dependence (const_rtx, const_rtx);
3626 extern int may_alias_p (const_rtx, const_rtx);
3627 extern void init_alias_target (void);
3628 extern void init_alias_analysis (void);
3629 extern void end_alias_analysis (void);
3630 extern void vt_equate_reg_base_value (const_rtx, const_rtx);
3631 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
3632 extern bool memory_must_be_modified_in_insn_p (const_rtx, const_rtx);
3633 extern bool may_be_sp_based_p (rtx);
3634 extern rtx gen_hard_reg_clobber (machine_mode, unsigned int);
3635 extern rtx get_reg_known_value (unsigned int);
3636 extern bool get_reg_known_equiv_p (unsigned int);
3637 extern rtx get_reg_base_value (unsigned int);
3639 #ifdef STACK_REGS
3640 extern int stack_regs_mentioned (const_rtx insn);
3641 #endif
3643 /* In toplev.c */
3644 extern GTY(()) rtx stack_limit_rtx;
3646 /* In var-tracking.c */
3647 extern unsigned int variable_tracking_main (void);
3649 /* In stor-layout.c. */
3650 extern void get_mode_bounds (machine_mode, int, machine_mode,
3651 rtx *, rtx *);
3653 /* In loop-iv.c */
3654 extern rtx canon_condition (rtx);
3655 extern void simplify_using_condition (rtx, rtx *, bitmap);
3657 /* In final.c */
3658 extern unsigned int compute_alignments (void);
3659 extern void update_alignments (vec<rtx> &);
3660 extern int asm_str_count (const char *templ);
3662 struct rtl_hooks
3664 rtx (*gen_lowpart) (machine_mode, rtx);
3665 rtx (*gen_lowpart_no_emit) (machine_mode, rtx);
3666 rtx (*reg_nonzero_bits) (const_rtx, machine_mode, const_rtx, machine_mode,
3667 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
3668 rtx (*reg_num_sign_bit_copies) (const_rtx, machine_mode, const_rtx, machine_mode,
3669 unsigned int, unsigned int *);
3670 bool (*reg_truncated_to_mode) (machine_mode, const_rtx);
3672 /* Whenever you add entries here, make sure you adjust rtlhooks-def.h. */
3675 /* Each pass can provide its own. */
3676 extern struct rtl_hooks rtl_hooks;
3678 /* ... but then it has to restore these. */
3679 extern const struct rtl_hooks general_rtl_hooks;
3681 /* Keep this for the nonce. */
3682 #define gen_lowpart rtl_hooks.gen_lowpart
3684 extern void insn_locations_init (void);
3685 extern void insn_locations_finalize (void);
3686 extern void set_curr_insn_location (location_t);
3687 extern location_t curr_insn_location (void);
3689 /* rtl-error.c */
3690 extern void _fatal_insn_not_found (const_rtx, const char *, int, const char *)
3691 ATTRIBUTE_NORETURN;
3692 extern void _fatal_insn (const char *, const_rtx, const char *, int, const char *)
3693 ATTRIBUTE_NORETURN;
3695 #define fatal_insn(msgid, insn) \
3696 _fatal_insn (msgid, insn, __FILE__, __LINE__, __FUNCTION__)
3697 #define fatal_insn_not_found(insn) \
3698 _fatal_insn_not_found (insn, __FILE__, __LINE__, __FUNCTION__)
3700 /* reginfo.c */
3701 extern tree GTY(()) global_regs_decl[FIRST_PSEUDO_REGISTER];
3703 #endif /* ! GCC_RTL_H */