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/* Declarations for interface to insn recognizer and insn-output.c.
Copyright (C) 1987, 1996, 1997, 1998,
1999, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Random number that should be large enough for all purposes. */
#define MAX_RECOG_ALTERNATIVES 30
/* Types of operands. */
enum op_type {
OP_IN,
OP_OUT,
OP_INOUT
};
struct operand_alternative
{
/* Pointer to the beginning of the constraint string for this alternative,
for easier access by alternative number. */
const char *constraint;
/* The register class valid for this alternative (possibly NO_REGS). */
enum reg_class class;
/* "Badness" of this alternative, computed from number of '?' and '!'
characters in the constraint string. */
unsigned int reject;
/* -1 if no matching constraint was found, or an operand number. */
int matches;
/* The same information, but reversed: -1 if this operand is not
matched by any other, or the operand number of the operand that
matches this one. */
int matched;
/* Nonzero if '&' was found in the constraint string. */
unsigned int earlyclobber:1;
/* Nonzero if 'm' was found in the constraint string. */
unsigned int memory_ok:1;
/* Nonzero if 'o' was found in the constraint string. */
unsigned int offmem_ok:1;
/* Nonzero if 'V' was found in the constraint string. */
unsigned int nonoffmem_ok:1;
/* Nonzero if '<' was found in the constraint string. */
unsigned int decmem_ok:1;
/* Nonzero if '>' was found in the constraint string. */
unsigned int incmem_ok:1;
/* Nonzero if 'X' was found in the constraint string, or if the constraint
string for this alternative was empty. */
unsigned int anything_ok:1;
};
extern void init_recog PARAMS ((void));
extern void init_recog_no_volatile PARAMS ((void));
extern int recog_memoized PARAMS ((rtx));
extern int check_asm_operands PARAMS ((rtx));
extern int asm_operand_ok PARAMS ((rtx, const char *));
extern int validate_change PARAMS ((rtx, rtx *, rtx, int));
extern int apply_change_group PARAMS ((void));
extern int num_validated_changes PARAMS ((void));
extern void cancel_changes PARAMS ((int));
extern int constrain_operands PARAMS ((int));
extern int memory_address_p PARAMS ((enum machine_mode, rtx));
extern int strict_memory_address_p PARAMS ((enum machine_mode, rtx));
extern int validate_replace_rtx PARAMS ((rtx, rtx, rtx));
extern void validate_replace_rtx_group PARAMS ((rtx, rtx, rtx));
extern int validate_replace_src PARAMS ((rtx, rtx, rtx));
#ifdef HAVE_cc0
extern int next_insn_tests_no_inequality PARAMS ((rtx));
#endif
extern int reg_fits_class_p PARAMS ((rtx, enum reg_class, int,
enum machine_mode));
extern rtx *find_single_use PARAMS ((rtx, rtx, rtx *));
extern int general_operand PARAMS ((rtx, enum machine_mode));
extern int address_operand PARAMS ((rtx, enum machine_mode));
extern int register_operand PARAMS ((rtx, enum machine_mode));
extern int pmode_register_operand PARAMS ((rtx, enum machine_mode));
extern int scratch_operand PARAMS ((rtx, enum machine_mode));
extern int immediate_operand PARAMS ((rtx, enum machine_mode));
extern int const_int_operand PARAMS ((rtx, enum machine_mode));
extern int const_double_operand PARAMS ((rtx, enum machine_mode));
extern int nonimmediate_operand PARAMS ((rtx, enum machine_mode));
extern int nonmemory_operand PARAMS ((rtx, enum machine_mode));
extern int push_operand PARAMS ((rtx, enum machine_mode));
extern int pop_operand PARAMS ((rtx, enum machine_mode));
extern int memory_operand PARAMS ((rtx, enum machine_mode));
extern int indirect_operand PARAMS ((rtx, enum machine_mode));
extern int mode_independent_operand PARAMS ((rtx, enum machine_mode));
extern int comparison_operator PARAMS ((rtx, enum machine_mode));
extern int offsettable_memref_p PARAMS ((rtx));
extern int offsettable_nonstrict_memref_p PARAMS ((rtx));
extern int offsettable_address_p PARAMS ((int, enum machine_mode, rtx));
extern int mode_dependent_address_p PARAMS ((rtx));
extern int recog PARAMS ((rtx, rtx, int *));
extern void add_clobbers PARAMS ((rtx, int));
extern void insn_extract PARAMS ((rtx));
extern void extract_insn PARAMS ((rtx));
extern void preprocess_constraints PARAMS ((void));
extern rtx peep2_next_insn PARAMS ((int));
extern int peep2_regno_dead_p PARAMS ((int, int));
extern int peep2_reg_dead_p PARAMS ((int, rtx));
#ifdef CLEAR_HARD_REG_SET
extern rtx peep2_find_free_register PARAMS ((int, int, const char *,
enum machine_mode,
HARD_REG_SET *));
#endif
extern void peephole2_optimize PARAMS ((FILE *));
extern rtx peephole2_insns PARAMS ((rtx, rtx, int *));
/* Nonzero means volatile operands are recognized. */
extern int volatile_ok;
/* Set by constrain_operands to the number of the alternative that
matched. */
extern int which_alternative;
/* The following vectors hold the results from insn_extract. */
struct recog_data
{
/* It is very tempting to make the 5 operand related arrays into a
structure and index on that. However, to be source compatible
with all of the existing md file insn constraints and output
templates, we need `operand' as a flat array. Without that
member, making an array for the rest seems pointless. */
/* Gives value of operand N. */
rtx operand[MAX_RECOG_OPERANDS];
/* Gives location where operand N was found. */
rtx *operand_loc[MAX_RECOG_OPERANDS];
/* Gives the constraint string for operand N. */
const char *constraints[MAX_RECOG_OPERANDS];
/* Gives the mode of operand N. */
enum machine_mode operand_mode[MAX_RECOG_OPERANDS];
/* Gives the type (in, out, inout) for operand N. */
enum op_type operand_type[MAX_RECOG_OPERANDS];
/* Gives location where the Nth duplicate-appearance of an operand
was found. This is something that matched MATCH_DUP. */
rtx *dup_loc[MAX_DUP_OPERANDS];
/* Gives the operand number that was duplicated in the Nth
duplicate-appearance of an operand. */
char dup_num[MAX_DUP_OPERANDS];
/* ??? Note that these are `char' instead of `unsigned char' to (try to)
avoid certain lossage from K&R C, wherein `unsigned char' default
promotes to `unsigned int' instead of `int' as in ISO C. As of 1999,
the most common places to bootstrap from K&R C are SunOS and HPUX,
both of which have signed characters by default. The only other
supported natives that have both K&R C and unsigned characters are
ROMP and Irix 3, and neither have been seen for a while, but do
continue to consider unsignedness when performing arithmetic inside
a comparison. */
/* The number of operands of the insn. */
char n_operands;
/* The number of MATCH_DUPs in the insn. */
char n_dups;
/* The number of alternatives in the constraints for the insn. */
char n_alternatives;
};
extern struct recog_data recog_data;
/* Contains a vector of operand_alternative structures for every operand.
Set up by preprocess_constraints. */
extern struct operand_alternative recog_op_alt[MAX_RECOG_OPERANDS][MAX_RECOG_ALTERNATIVES];
/* A table defined in insn-output.c that give information about
each insn-code value. */
typedef int (*insn_operand_predicate_fn) PARAMS ((rtx, enum machine_mode));
typedef const char * (*insn_output_fn) PARAMS ((rtx *, rtx));
typedef rtx (*insn_gen_fn) PARAMS ((rtx, ...));
struct insn_operand_data
{
insn_operand_predicate_fn predicate;
const char *constraint;
enum machine_mode mode;
char strict_low;
char eliminable;
};
/* Legal values for insn_data.output_format. Indicate what type of data
is stored in insn_data.output. */
#define INSN_OUTPUT_FORMAT_NONE 0 /* abort */
#define INSN_OUTPUT_FORMAT_SINGLE 1 /* const char * */
#define INSN_OUTPUT_FORMAT_MULTI 2 /* const char * const * */
#define INSN_OUTPUT_FORMAT_FUNCTION 3 /* const char * (*)(...) */
struct insn_data
{
const char *name;
const PTR output;
insn_gen_fn genfun;
const struct insn_operand_data *operand;
char n_operands;
char n_dups;
char n_alternatives;
char output_format;
};
extern const struct insn_data insn_data[];
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