1 /* Declarations for interface to insn recognizer and insn-output.c.
2 Copyright (C) 1987 Free Software Foundation, Inc.
4 This file is part of GNU CC.
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)
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.
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. */
20 /* Recognize an insn and return its insn-code,
21 which is the sequence number of the DEFINE_INSN that it matches.
22 If the insn does not match, return -1. */
24 extern int recog_memoized ();
26 /* Determine whether a proposed change to an insn or MEM will make it
27 invalid. Make the change if not. */
29 extern int validate_change ();
31 /* Apply a group of changes if valid. */
33 extern int apply_change_group ();
35 /* Return the number of changes so far in the current group. */
37 extern int num_validated_changes ();
39 /* Retract some changes. */
41 extern void cancel_changes ();
43 /* Nonzero means volatile operands are recognized. */
45 extern int volatile_ok
;
47 /* Extract the operands from an insn that has been recognized. */
49 extern void insn_extract ();
51 /* The following vectors hold the results from insn_extract. */
53 /* Indexed by N, gives value of operand N. */
54 extern rtx recog_operand
[];
56 /* Indexed by N, gives location where operand N was found. */
57 extern rtx
*recog_operand_loc
[];
59 /* Indexed by N, gives location where the Nth duplicate-appearance of
60 an operand was found. This is something that matched MATCH_DUP. */
61 extern rtx
*recog_dup_loc
[];
63 /* Indexed by N, gives the operand number that was duplicated in the
64 Nth duplicate-appearance of an operand. */
65 extern char recog_dup_num
[];
73 /* Access the output function for CODE. */
75 #define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
77 /* Tables defined in insn-output.c that give information about
78 each insn-code value. */
80 /* These are vectors indexed by insn-code. Details in genoutput.c. */
82 extern char *const insn_template
[];
84 extern char *(*const insn_outfun
[]) ();
86 extern const int insn_n_operands
[];
88 extern const int insn_n_dups
[];
90 /* Indexed by insn code number, gives # of constraint alternatives. */
92 extern const int insn_n_alternatives
[];
94 /* These are two-dimensional arrays indexed first by the insn-code
95 and second by the operand number. Details in genoutput.c. */
97 #ifdef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
98 extern char *const insn_operand_constraint
[][MAX_RECOG_OPERANDS
];
101 #ifndef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
102 extern const char insn_operand_address_p
[][MAX_RECOG_OPERANDS
];
105 extern const enum machine_mode insn_operand_mode
[][MAX_RECOG_OPERANDS
];
107 extern const char insn_operand_strict_low
[][MAX_RECOG_OPERANDS
];
109 extern int (*const insn_operand_predicate
[][MAX_RECOG_OPERANDS
]) ();
111 extern char * insn_name
[];