gcc/gensupport.h

   1 /* Declarations for rtx-reader support for gen* routines.
   2    Copyright (C) 2000, 2002, 2003, 2004, 2007 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 3, 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 COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_GENSUPPORT_H
  21 #define GCC_GENSUPPORT_H
  22
  23 struct obstack;
  24 extern struct obstack *rtl_obstack;
  25 extern const char *in_fname;
  26
  27 extern int init_md_reader_args_cb (int, char **, bool (*)(const char *));
  28 extern int init_md_reader_args (int, char **);
  29 extern rtx read_md_rtx (int *, int *);
  30
  31 extern void message_with_line (int, const char *, ...)
  32      ATTRIBUTE_PRINTF_2;
  33
  34 /* Set this to 0 to disable automatic elision of insn patterns which
  35    can never be used in this configuration.  See genconditions.c.
  36    Must be set before calling init_md_reader.  */
  37 extern int insn_elision;
  38
  39 /* If the C test passed as the argument can be evaluated at compile
  40    time, return its truth value; else return -1.  The test must have
  41    appeared somewhere in the machine description when genconditions
  42    was run.  */
  43 extern int maybe_eval_c_test (const char *);
  44
  45 /* Add an entry to the table of conditions.  Used by genconditions and
  46    by read-rtl.c.  */
  47 extern void add_c_test (const char *, int);
  48
  49 /* This structure is used internally by gensupport.c and genconditions.c.  */
  50 struct c_test
  51 {
  52   const char *expr;
  53   int value;
  54 };
  55
  56 #ifdef __HASHTAB_H__
  57 extern hashval_t hash_c_test (const void *);
  58 extern int cmp_c_test (const void *, const void *);
  59 extern void traverse_c_tests (htab_trav, void *);
  60 #endif
  61
  62 extern int n_comma_elts (const char *);
  63 extern const char *scan_comma_elt (const char **);
  64
  65 /* Predicate handling: helper functions and data structures.  */
  66
  67 struct pred_data
  68 {
  69   struct pred_data *next;       /* for iterating over the set of all preds */
  70   const char *name;             /* predicate name */
  71   bool special;                 /* special handling of modes? */
  72
  73   /* data used primarily by genpreds.c */
  74   const char *c_block;          /* C test block */
  75   rtx exp;                      /* RTL test expression */
  76
  77   /* data used primarily by genrecog.c */
  78   enum rtx_code singleton;      /* if pred takes only one code, that code */
  79   int num_codes;                /* number of codes accepted */
  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_code (struct pred_data *, enum rtx_code);
  88 extern void add_predicate (struct pred_data *);
  89
  90 #define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
  91
  92 /* This callback will be invoked whenever an rtl include directive is
  93    processed.  To be used for creation of the dependency file.  */
  94 extern void (*include_callback) (const char *);
  95
  96 #endif /* GCC_GENSUPPORT_H */