gcc/gensupport.h

   1 /* Declarations for rtx-reader support for gen* routines.
   2    Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301, USA.  */
  20
  21 #ifndef GCC_GENSUPPORT_H
  22 #define GCC_GENSUPPORT_H
  23
  24 struct obstack;
  25 extern struct obstack *rtl_obstack;
  26 extern const char *in_fname;
  27
  28 extern int init_md_reader_args_cb (int, char **, bool (*)(const char *));
  29 extern int init_md_reader_args (int, char **);
  30 extern rtx read_md_rtx (int *, int *);
  31
  32 extern void message_with_line (int, const char *, ...)
  33      ATTRIBUTE_PRINTF_2;
  34
  35 /* Set this to 0 to disable automatic elision of insn patterns which
  36    can never be used in this configuration.  See genconditions.c.
  37    Must be set before calling init_md_reader.  */
  38 extern int insn_elision;
  39
  40 /* If the C test passed as the argument can be evaluated at compile
  41    time, return its truth value; else return -1.  The test must have
  42    appeared somewhere in the machine description when genconditions
  43    was run.  */
  44 extern int maybe_eval_c_test (const char *);
  45
  46 /* Add an entry to the table of conditions.  Used by genconditions and
  47    by read-rtl.c.  */
  48 extern void add_c_test (const char *, int);
  49
  50 /* This structure is used internally by gensupport.c and genconditions.c.  */
  51 struct c_test
  52 {
  53   const char *expr;
  54   int value;
  55 };
  56
  57 #ifdef __HASHTAB_H__
  58 extern hashval_t hash_c_test (const void *);
  59 extern int cmp_c_test (const void *, const void *);
  60 extern void traverse_c_tests (htab_trav, void *);
  61 #endif
  62
  63 extern int n_comma_elts (const char *);
  64 extern const char *scan_comma_elt (const char **);
  65
  66 /* Predicate handling: helper functions and data structures.  */
  67
  68 struct pred_data
  69 {
  70   struct pred_data *next;       /* for iterating over the set of all preds */
  71   const char *name;             /* predicate name */
  72   bool special;                 /* special handling of modes? */
  73
  74   /* data used primarily by genpreds.c */
  75   const char *c_block;          /* C test block */
  76   rtx exp;                      /* RTL test expression */
  77
  78   /* data used primarily by genrecog.c */
  79   enum rtx_code singleton;      /* if pred takes only one code, that code */
  80   bool allows_non_lvalue;       /* if pred allows non-lvalue expressions */
  81   bool allows_non_const;        /* if pred allows non-const expressions */
  82   bool codes[NUM_RTX_CODE];     /* set of codes accepted */
  83 };
  84
  85 extern struct pred_data *first_predicate;
  86 extern struct pred_data *lookup_predicate (const char *);
  87 extern void add_predicate (struct pred_data *);
  88
  89 #define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
  90
  91 /* This callback will be invoked whenever an rtl include directive is
  92    processed.  To be used for creation of the dependency file.  */
  93 extern void (*include_callback) (const char *);
  94
  95 #endif /* GCC_GENSUPPORT_H */