gcc/recog.h

   1 /* Declarations for interface to insn recognizer and insn-output.c.
   2    Copyright (C) 1987 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* Add prototype support.  */
  21 #ifndef PROTO
  22 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
  23 #define PROTO(ARGS) ARGS
  24 #else
  25 #define PROTO(ARGS) ()
  26 #endif
  27 #endif
  28
  29 /* Recognize an insn and return its insn-code,
  30    which is the sequence number of the DEFINE_INSN that it matches.
  31    If the insn does not match, return -1.  */
  32
  33 extern int recog_memoized PROTO((rtx));
  34
  35 /* Determine whether a proposed change to an insn or MEM will make it
  36    invalid.  Make the change if not.  */
  37
  38 extern int validate_change PROTO((rtx, rtx *, rtx, int));
  39
  40 /* Apply a group of changes if valid.  */
  41
  42 extern int apply_change_group PROTO((void));
  43
  44 /* Return the number of changes so far in the current group.   */
  45
  46 extern int num_validated_changes PROTO((void));
  47
  48 /* Retract some changes.  */
  49
  50 extern void cancel_changes PROTO((int));
  51
  52 /* Nonzero means volatile operands are recognized.  */
  53
  54 extern int volatile_ok;
  55
  56 /* Extract the operands from an insn that has been recognized.  */
  57
  58 extern void insn_extract PROTO((rtx));
  59
  60 /* The following vectors hold the results from insn_extract.  */
  61
  62 /* Indexed by N, gives value of operand N.  */
  63 extern rtx recog_operand[];
  64
  65 /* Indexed by N, gives location where operand N was found.  */
  66 extern rtx *recog_operand_loc[];
  67
  68 /* Indexed by N, gives location where the Nth duplicate-appearance of
  69    an operand was found.  This is something that matched MATCH_DUP.  */
  70 extern rtx *recog_dup_loc[];
  71
  72 /* Indexed by N, gives the operand number that was duplicated in the
  73    Nth duplicate-appearance of an operand.  */
  74 extern char recog_dup_num[];
  75
  76 #ifndef __STDC__
  77 #ifndef const
  78 #define const
  79 #endif
  80 #endif
  81
  82 /* Access the output function for CODE.  */
  83
  84 #define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
  85
  86 /* Tables defined in insn-output.c that give information about
  87    each insn-code value.  */
  88
  89 /* These are vectors indexed by insn-code.  Details in genoutput.c.  */
  90
  91 extern char *const insn_template[];
  92
  93 extern char *(*const insn_outfun[]) ();
  94
  95 extern const int insn_n_operands[];
  96
  97 extern const int insn_n_dups[];
  98
  99 /* Indexed by insn code number, gives # of constraint alternatives.  */
 100
 101 extern const int insn_n_alternatives[];
 102
 103 /* These are two-dimensional arrays indexed first by the insn-code
 104    and second by the operand number.  Details in genoutput.c.  */
 105
 106 #ifdef REGISTER_CONSTRAINTS  /* Avoid undef sym in certain broken linkers.  */
 107 extern char *const insn_operand_constraint[][MAX_RECOG_OPERANDS];
 108 #endif
 109
 110 #ifndef REGISTER_CONSTRAINTS  /* Avoid undef sym in certain broken linkers.  */
 111 extern const char insn_operand_address_p[][MAX_RECOG_OPERANDS];
 112 #endif
 113
 114 extern const enum machine_mode insn_operand_mode[][MAX_RECOG_OPERANDS];
 115
 116 extern const char insn_operand_strict_low[][MAX_RECOG_OPERANDS];
 117
 118 extern int (*const insn_operand_predicate[][MAX_RECOG_OPERANDS]) ();
 119
 120 extern char * insn_name[];