Move *-*-gnu* pattern below *-*-linux*.
[official-gcc.git] / gcc / recog.h
blob0337214e76d99496ecc8337528d9a520a4f3aecf
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)
9 any later version.
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. */
25 enum op_type {
26 OP_IN,
27 OP_OUT,
28 OP_INOUT
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). */
38 enum reg_class class;
40 /* "Badness" of this alternative, computed from number of '?' and '!'
41 characters in the constraint string. */
42 unsigned int reject;
44 /* -1 if no matching constraint was found, or an operand number. */
45 int matches;
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
48 matches this one. */
49 int matched;
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));
84 #ifdef HAVE_cc0
85 extern int next_insn_tests_no_inequality PROTO ((rtx));
86 #endif
87 extern int reg_fits_class_p PROTO((rtx, enum reg_class, int,
88 enum machine_mode));
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));
117 extern rtx recog_next_insn PROTO((rtx, int));
118 extern void peephole2_optimize PROTO((FILE *));
119 extern rtx peephole2_insns PROTO((rtx, rtx, rtx *));
121 /* Nonzero means volatile operands are recognized. */
122 extern int volatile_ok;
124 /* Set by constrain_operands to the number of the alternative that
125 matched. */
126 extern int which_alternative;
128 /* The following vectors hold the results from insn_extract. */
130 /* Indexed by N, gives value of operand N. */
131 extern rtx recog_operand[];
133 /* Indexed by N, gives location where operand N was found. */
134 extern rtx *recog_operand_loc[];
136 /* Indexed by N, gives location where the Nth duplicate-appearance of
137 an operand was found. This is something that matched MATCH_DUP. */
138 extern rtx *recog_dup_loc[];
140 /* Indexed by N, gives the operand number that was duplicated in the
141 Nth duplicate-appearance of an operand. */
142 extern char recog_dup_num[];
144 /* The next variables are set up by extract_insn. */
146 /* The number of operands of the insn. */
147 extern int recog_n_operands;
149 /* The number of MATCH_DUPs in the insn. */
150 extern int recog_n_dups;
152 /* The number of alternatives in the constraints for the insn. */
153 extern int recog_n_alternatives;
155 /* Indexed by N, gives the mode of operand N. */
156 extern enum machine_mode recog_operand_mode[];
158 /* Indexed by N, gives the constraint string for operand N. */
159 extern const char *recog_constraints[];
161 /* Indexed by N, gives the type (in, out, inout) for operand N. */
162 extern enum op_type recog_op_type[];
164 #ifndef REGISTER_CONSTRAINTS
165 /* Indexed by N, nonzero if operand N should be an address. */
166 extern char recog_operand_address_p[];
167 #endif
169 /* Contains a vector of operand_alternative structures for every operand.
170 Set up by preprocess_constraints. */
171 extern struct operand_alternative recog_op_alt[MAX_RECOG_OPERANDS][MAX_RECOG_ALTERNATIVES];
173 /* Access the output function for CODE. */
175 #define OUT_FCN(CODE) (*insn_outfun[(int) (CODE)])
177 /* Tables defined in insn-output.c that give information about
178 each insn-code value. */
180 /* These are vectors indexed by insn-code. Details in genoutput.c. */
182 extern const char *const insn_template[];
184 extern const char *(*const insn_outfun[]) PROTO ((rtx *, rtx));
186 extern const int insn_n_operands[];
188 extern const int insn_n_dups[];
190 /* Indexed by insn code number, gives # of constraint alternatives. */
192 extern const int insn_n_alternatives[];
194 /* These are two-dimensional arrays indexed first by the insn-code
195 and second by the operand number. Details in genoutput.c. */
197 #ifdef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
198 extern const char *const insn_operand_constraint[][MAX_RECOG_OPERANDS];
199 #endif
201 #ifndef REGISTER_CONSTRAINTS /* Avoid undef sym in certain broken linkers. */
202 extern const char insn_operand_address_p[][MAX_RECOG_OPERANDS];
203 #endif
205 extern const enum machine_mode insn_operand_mode[][MAX_RECOG_OPERANDS];
207 extern const char insn_operand_strict_low[][MAX_RECOG_OPERANDS];
209 extern int (*const insn_operand_predicate[][MAX_RECOG_OPERANDS]) PROTO ((rtx, enum machine_mode));
211 extern const char * insn_name[];