/* Declarations for rtx-reader support for gen* routines.
- Copyright (C) 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, 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 PARAMS ((int, char **));
-extern int init_md_reader PARAMS ((const char *));
-extern rtx read_md_rtx PARAMS ((int *, int *));
+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 PARAMS ((int, const char *, ...))
+extern void message_with_line (int, const char *, ...)
ATTRIBUTE_PRINTF_2;
-extern int n_comma_elts PARAMS ((const char *));
-extern const char *scan_comma_elt PARAMS ((const char **));
+/* 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)
+#endif /* GCC_GENSUPPORT_H */