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/* Declarations for rtx-reader support for gen* routines.

   Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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.

GCC 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 GCC; see the file COPYING.  If not, write to the Free

Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.  */

#ifndef GCC_GENSUPPORT_H

#define GCC_GENSUPPORT_H

struct obstack;

extern struct obstack *rtl_obstack;

extern const char *in_fname;

extern int init_md_reader_args_cb (int, char **, bool (*)(const char *));

extern int init_md_reader_args (int, char **);

extern rtx read_md_rtx (int *, int *);

extern void message_with_line (int, const char *, ...)

     ATTRIBUTE_PRINTF_2;

/* Set this to 0 to disable automatic elision of insn patterns which

   can never be used in this configuration.  See genconditions.c.

   Must be set before calling init_md_reader.  */

extern int insn_elision;

/* If this is 1, the insn elision table doesn't even exist yet;

   maybe_eval_c_test will always return -1.  This is distinct from

   insn_elision because genflags and gencodes need to see all the

   patterns, but treat elided patterns differently.  */

extern const int insn_elision_unavailable;

/* If the C test passed as the argument can be evaluated at compile

   time, return its truth value; else return -1.  The test must have

   appeared somewhere in the machine description when genconditions

   was run.  */

extern int maybe_eval_c_test (const char *);

/* This table should not be accessed directly; use maybe_eval_c_test.  */

struct c_test

{

  const char *expr;

  int value;

};

extern const struct c_test insn_conditions[];

extern const size_t n_insn_conditions;

#ifdef __HASHTAB_H__

extern hashval_t hash_c_test (const void *);

extern int cmp_c_test (const void *, const void *);

#endif

extern int n_comma_elts (const char *);

extern const char *scan_comma_elt (const char **);

/* Predicate handling: helper functions and data structures.  */

struct pred_data

{

  struct pred_data *next;       /* for iterating over the set of all preds */

  const char *name;             /* predicate name */

  bool special;                 /* special handling of modes? */

  /* data used primarily by genpreds.c */

  const char *c_block;          /* C test block */

  rtx exp;                      /* RTL test expression */

  /* data used primarily by genrecog.c */

  enum rtx_code singleton;      /* if pred takes only one code, that code */

  bool allows_non_lvalue;       /* if pred allows non-lvalue expressions */

  bool allows_non_const;        /* if pred allows non-const expressions */

  bool codes[NUM_RTX_CODE];     /* set of codes accepted */

};

extern struct pred_data *first_predicate;

extern struct pred_data *lookup_predicate (const char *);

extern void add_predicate (struct pred_data *);

#define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)

/* This callback will be invoked whenever an rtl include directive is

   processed.  To be used for creation of the dependency file.  */

extern void (*include_callback) (const char *);

#endif /* GCC_GENSUPPORT_H */