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, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, 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 this is 1, the insn elision table doesn't even exist yet;
  41    maybe_eval_c_test will always return -1.  This is distinct from
  42    insn_elision because genflags and gencodes need to see all the
  43    patterns, but treat elided patterns differently.  */
  44 extern const int insn_elision_unavailable;
  45
  46 /* If the C test passed as the argument can be evaluated at compile
  47    time, return its truth value; else return -1.  The test must have
  48    appeared somewhere in the machine description when genconditions
  49    was run.  */
  50 extern int maybe_eval_c_test (const char *);
  51
  52 /* This table should not be accessed directly; use maybe_eval_c_test.  */
  53 struct c_test
  54 {
  55   const char *expr;
  56   int value;
  57 };
  58
  59 extern const struct c_test insn_conditions[];
  60 extern const size_t n_insn_conditions;
  61
  62 #ifdef __HASHTAB_H__
  63 extern hashval_t hash_c_test (const void *);
  64 extern int cmp_c_test (const void *, const void *);
  65 #endif
  66
  67 extern int n_comma_elts (const char *);
  68 extern const char *scan_comma_elt (const char **);
  69
  70 /* Predicate handling: helper functions and data structures.  */
  71
  72 struct pred_data
  73 {
  74   struct pred_data *next;       /* for iterating over the set of all preds */
  75   const char *name;             /* predicate name */
  76   bool special;                 /* special handling of modes? */
  77
  78   /* data used primarily by genpreds.c */
  79   const char *c_block;          /* C test block */
  80   rtx exp;                      /* RTL test expression */
  81
  82   /* data used primarily by genrecog.c */
  83   enum rtx_code singleton;      /* if pred takes only one code, that code */
  84   bool allows_non_lvalue;       /* if pred allows non-lvalue expressions */
  85   bool allows_non_const;        /* if pred allows non-const expressions */
  86   bool codes[NUM_RTX_CODE];     /* set of codes accepted */
  87 };
  88
  89 extern struct pred_data *first_predicate;
  90 extern struct pred_data *lookup_predicate (const char *);
  91 extern void add_predicate (struct pred_data *);
  92
  93 #define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
  94
  95 #endif /* GCC_GENSUPPORT_H */