1 /* Declarations for interface to insn recognizer and insn-output.c.
2 Copyright (C) 1987, 1996, 1997, 1998, 1999 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, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Random number that should be large enough for all purposes. */
22 #define MAX_RECOG_ALTERNATIVES 30
24 /* Types of operands. */
31 struct operand_alternative
33 /* Pointer to the beginning of the constraint string for this alternative,
34 for easier access by alternative number. */
35 const char *constraint
;
37 /* The register class valid for this alternative (possibly NO_REGS). */
40 /* "Badness" of this alternative, computed from number of '?' and '!'
41 characters in the constraint string. */
44 /* -1 if no matching constraint was found, or an operand number. */
46 /* The same information, but reversed: -1 if this operand is not
47 matched by any other, or the operand number of the operand that
51 /* Nonzero if '&' was found in the constraint string. */
52 unsigned int earlyclobber
:1;
53 /* Nonzero if 'm' was found in the constraint string. */
54 unsigned int memory_ok
:1;
55 /* Nonzero if 'o' was found in the constraint string. */
56 unsigned int offmem_ok
:1;
57 /* Nonzero if 'V' was found in the constraint string. */
58 unsigned int nonoffmem_ok
:1;
59 /* Nonzero if '<' was found in the constraint string. */
60 unsigned int decmem_ok
:1;
61 /* Nonzero if '>' was found in the constraint string. */
62 unsigned int incmem_ok
:1;
63 /* Nonzero if 'X' was found in the constraint string, or if the constraint
64 string for this alternative was empty. */
65 unsigned int anything_ok
:1;
69 extern void init_recog
PROTO((void));
70 extern void init_recog_no_volatile
PROTO((void));
71 extern int recog_memoized
PROTO((rtx
));
72 extern int check_asm_operands
PROTO((rtx
));
73 extern int asm_operand_ok
PROTO((rtx
, const char *));
74 extern int validate_change
PROTO((rtx
, rtx
*, rtx
, int));
75 extern int apply_change_group
PROTO((void));
76 extern int num_validated_changes
PROTO((void));
77 extern void cancel_changes
PROTO((int));
78 extern int constrain_operands
PROTO((int));
79 extern int memory_address_p
PROTO((enum machine_mode
, rtx
));
80 extern int strict_memory_address_p
PROTO((enum machine_mode
, rtx
));
81 extern int validate_replace_rtx
PROTO((rtx
, rtx
, rtx
));
82 extern void validate_replace_rtx_group
PROTO((rtx
, rtx
, rtx
));
83 extern int validate_replace_src
PROTO((rtx
, rtx
, rtx
));
85 extern int next_insn_tests_no_inequality
PROTO ((rtx
));
87 extern int reg_fits_class_p
PROTO((rtx
, enum reg_class
, int,
89 extern rtx
*find_single_use
PROTO((rtx
, rtx
, rtx
*));
91 extern int general_operand
PROTO((rtx
, enum machine_mode
));
92 extern int address_operand
PROTO((rtx
, enum machine_mode
));
93 extern int register_operand
PROTO((rtx
, enum machine_mode
));
94 extern int scratch_operand
PROTO((rtx
, enum machine_mode
));
95 extern int immediate_operand
PROTO((rtx
, enum machine_mode
));
96 extern int const_int_operand
PROTO((rtx
, enum machine_mode
));
97 extern int const_double_operand
PROTO((rtx
, enum machine_mode
));
98 extern int nonimmediate_operand
PROTO((rtx
, enum machine_mode
));
99 extern int nonmemory_operand
PROTO((rtx
, enum machine_mode
));
100 extern int push_operand
PROTO((rtx
, enum machine_mode
));
101 extern int pop_operand
PROTO((rtx
, enum machine_mode
));
102 extern int memory_operand
PROTO((rtx
, enum machine_mode
));
103 extern int indirect_operand
PROTO((rtx
, enum machine_mode
));
104 extern int mode_independent_operand
PROTO((rtx
, enum machine_mode
));
105 extern int comparison_operator
PROTO((rtx
, enum machine_mode
));
107 extern int offsettable_memref_p
PROTO((rtx
));
108 extern int offsettable_nonstrict_memref_p
PROTO((rtx
));
109 extern int offsettable_address_p
PROTO((int, enum machine_mode
, rtx
));
110 extern int mode_dependent_address_p
PROTO((rtx
));
112 extern int recog
PROTO((rtx
, rtx
, int *));
113 extern void add_clobbers
PROTO((rtx
, int));
114 extern void insn_extract
PROTO((rtx
));
115 extern void extract_insn
PROTO((rtx
));
116 extern void preprocess_constraints
PROTO((void));
118 /* Nonzero means volatile operands are recognized. */
119 extern int volatile_ok
;
121 /* Set by constrain_operands to the number of the alternative that
123 extern int which_alternative
;
125 /* The following vectors hold the results from insn_extract. */
127 /* Indexed by N, gives value of operand N. */
128 extern rtx recog_operand
[];
130 /* Indexed by N, gives location where operand N was found. */
131 extern rtx
*recog_operand_loc
[];
133 /* Indexed by N, gives location where the Nth duplicate-appearance of
134 an operand was found. This is something that matched MATCH_DUP. */
135 extern rtx
*recog_dup_loc
[];
137 /* Indexed by N, gives the operand number that was duplicated in the
138 Nth duplicate-appearance of an operand. */
139 extern char recog_dup_num
[];
141 /* The next variables are set up by extract_insn. */
143 /* The number of operands of the insn. */
144 extern int recog_n_operands
;
146 /* The number of MATCH_DUPs in the insn. */
147 extern int recog_n_dups
;
149 /* The number of alternatives in the constraints for the insn. */
150 extern int recog_n_alternatives
;
152 /* Indexed by N, gives the mode of operand N. */
153 extern enum machine_mode recog_operand_mode
[];
155 /* Indexed by N, gives the constraint string for operand N. */
156 extern const char *recog_constraints
[];
158 /* Indexed by N, gives the type (in, out, inout) for operand N. */
159 extern enum op_type recog_op_type
[];
161 #ifndef REGISTER_CONSTRAINTS
162 /* Indexed by N, nonzero if operand N should be an address. */
163 extern char recog_operand_address_p
[];
166 /* Contains a vector of operand_alternative structures for every operand.
167 Set up by preprocess_constraints. */
168 extern struct operand_alternative recog_op_alt
[MAX_RECOG_OPERANDS
][MAX_RECOG_ALTERNATIVES
];
170 /* Access the output function for CODE. */
172 #define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
174 /* Tables defined in insn-output.c that give information about
175 each insn-code value. */
177 /* These are vectors indexed by insn-code. Details in genoutput.c. */
179 extern const char *const insn_template
[];
181 extern const char *(*const insn_outfun
[]) ();
183 extern const int insn_n_operands
[];
185 extern const int insn_n_dups
[];
187 /* Indexed by insn code number, gives # of constraint alternatives. */
189 extern const int insn_n_alternatives
[];
191 /* These are two-dimensional arrays indexed first by the insn-code
192 and second by the operand number. Details in genoutput.c. */
194 #ifdef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
195 extern const char *const insn_operand_constraint
[][MAX_RECOG_OPERANDS
];
198 #ifndef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
199 extern const char insn_operand_address_p
[][MAX_RECOG_OPERANDS
];
202 extern const enum machine_mode insn_operand_mode
[][MAX_RECOG_OPERANDS
];
204 extern const char insn_operand_strict_low
[][MAX_RECOG_OPERANDS
];
206 extern int (*const insn_operand_predicate
[][MAX_RECOG_OPERANDS
]) ();
208 extern const char * insn_name
[];