gcc/recog.h

   1 /* Declarations for interface to insn recognizer and insn-output.c.
   2    Copyright (C) 1987, 1996 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include "gansidecl.h"
  22
  23 /* Recognize an insn and return its insn-code,
  24    which is the sequence number of the DEFINE_INSN that it matches.
  25    If the insn does not match, return -1.  */
  26
  27 extern int recog_memoized PROTO((rtx));
  28
  29 /* Determine whether a proposed change to an insn or MEM will make it
  30    invalid.  Make the change if not.  */
  31
  32 extern int validate_change PROTO((rtx, rtx *, rtx, int));
  33
  34 /* Apply a group of changes if valid.  */
  35
  36 extern int apply_change_group PROTO((void));
  37
  38 /* Return the number of changes so far in the current group.   */
  39
  40 extern int num_validated_changes PROTO((void));
  41
  42 /* Retract some changes.  */
  43
  44 extern void cancel_changes PROTO((int));
  45
  46 /* Nonzero means volatile operands are recognized.  */
  47
  48 extern int volatile_ok;
  49
  50 /* Extract the operands from an insn that has been recognized.  */
  51
  52 extern void insn_extract PROTO((rtx));
  53
  54 /* The following vectors hold the results from insn_extract.  */
  55
  56 /* Indexed by N, gives value of operand N.  */
  57 extern rtx recog_operand[];
  58
  59 /* Indexed by N, gives location where operand N was found.  */
  60 extern rtx *recog_operand_loc[];
  61
  62 /* Indexed by N, gives location where the Nth duplicate-appearance of
  63    an operand was found.  This is something that matched MATCH_DUP.  */
  64 extern rtx *recog_dup_loc[];
  65
  66 /* Indexed by N, gives the operand number that was duplicated in the
  67    Nth duplicate-appearance of an operand.  */
  68 extern char recog_dup_num[];
  69
  70 /* Access the output function for CODE.  */
  71
  72 #define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
  73
  74 /* Tables defined in insn-output.c that give information about
  75    each insn-code value.  */
  76
  77 /* These are vectors indexed by insn-code.  Details in genoutput.c.  */
  78
  79 extern char *const insn_template[];
  80
  81 extern char *(*const insn_outfun[]) ();
  82
  83 extern const int insn_n_operands[];
  84
  85 extern const int insn_n_dups[];
  86
  87 /* Indexed by insn code number, gives # of constraint alternatives.  */
  88
  89 extern const int insn_n_alternatives[];
  90
  91 /* These are two-dimensional arrays indexed first by the insn-code
  92    and second by the operand number.  Details in genoutput.c.  */
  93
  94 #ifdef REGISTER_CONSTRAINTS  /* Avoid undef sym in certain broken linkers.  */
  95 extern char *const insn_operand_constraint[][MAX_RECOG_OPERANDS];
  96 #endif
  97
  98 #ifndef REGISTER_CONSTRAINTS  /* Avoid undef sym in certain broken linkers.  */
  99 extern const char insn_operand_address_p[][MAX_RECOG_OPERANDS];
 100 #endif
 101
 102 extern const enum machine_mode insn_operand_mode[][MAX_RECOG_OPERANDS];
 103
 104 extern const char insn_operand_strict_low[][MAX_RECOG_OPERANDS];
 105
 106 extern int (*const insn_operand_predicate[][MAX_RECOG_OPERANDS]) ();
 107
 108 extern char * insn_name[];