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, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* Add prototype support.  */
  22 #ifndef PROTO
  23 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
  24 #define PROTO(ARGS) ARGS
  25 #else
  26 #define PROTO(ARGS) ()
  27 #endif
  28 #endif
  29
  30 /* Recognize an insn and return its insn-code,
  31    which is the sequence number of the DEFINE_INSN that it matches.
  32    If the insn does not match, return -1.  */
  33
  34 extern int recog_memoized PROTO((rtx));
  35
  36 /* Determine whether a proposed change to an insn or MEM will make it
  37    invalid.  Make the change if not.  */
  38
  39 extern int validate_change PROTO((rtx, rtx *, rtx, int));
  40
  41 /* Apply a group of changes if valid.  */
  42
  43 extern int apply_change_group PROTO((void));
  44
  45 /* Return the number of changes so far in the current group.   */
  46
  47 extern int num_validated_changes PROTO((void));
  48
  49 /* Retract some changes.  */
  50
  51 extern void cancel_changes PROTO((int));
  52
  53 /* Nonzero means volatile operands are recognized.  */
  54
  55 extern int volatile_ok;
  56
  57 /* Extract the operands from an insn that has been recognized.  */
  58
  59 extern void insn_extract PROTO((rtx));
  60
  61 /* The following vectors hold the results from insn_extract.  */
  62
  63 /* Indexed by N, gives value of operand N.  */
  64 extern rtx recog_operand[];
  65
  66 /* Indexed by N, gives location where operand N was found.  */
  67 extern rtx *recog_operand_loc[];
  68
  69 /* Indexed by N, gives location where the Nth duplicate-appearance of
  70    an operand was found.  This is something that matched MATCH_DUP.  */
  71 extern rtx *recog_dup_loc[];
  72
  73 /* Indexed by N, gives the operand number that was duplicated in the
  74    Nth duplicate-appearance of an operand.  */
  75 extern char recog_dup_num[];
  76
  77 #ifndef __STDC__
  78 #ifndef const
  79 #define const
  80 #endif
  81 #endif
  82
  83 /* Access the output function for CODE.  */
  84
  85 #define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
  86
  87 /* Tables defined in insn-output.c that give information about
  88    each insn-code value.  */
  89
  90 /* These are vectors indexed by insn-code.  Details in genoutput.c.  */
  91
  92 extern char *const insn_template[];
  93
  94 extern char *(*const insn_outfun[]) ();
  95
  96 extern const int insn_n_operands[];
  97
  98 extern const int insn_n_dups[];
  99
 100 /* Indexed by insn code number, gives # of constraint alternatives.  */
 101
 102 extern const int insn_n_alternatives[];
 103
 104 /* These are two-dimensional arrays indexed first by the insn-code
 105    and second by the operand number.  Details in genoutput.c.  */
 106
 107 #ifdef REGISTER_CONSTRAINTS  /* Avoid undef sym in certain broken linkers.  */
 108 extern char *const insn_operand_constraint[][MAX_RECOG_OPERANDS];
 109 #endif
 110
 111 #ifndef REGISTER_CONSTRAINTS  /* Avoid undef sym in certain broken linkers.  */
 112 extern const char insn_operand_address_p[][MAX_RECOG_OPERANDS];
 113 #endif
 114
 115 extern const enum machine_mode insn_operand_mode[][MAX_RECOG_OPERANDS];
 116
 117 extern const char insn_operand_strict_low[][MAX_RECOG_OPERANDS];
 118
 119 extern int (*const insn_operand_predicate[][MAX_RECOG_OPERANDS]) ();
 120
 121 extern char * insn_name[];