1/* Declarations for rtx-reader support for gen* routines. 2 Copyright (C) 2000, 2002, 2003, 2004 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 2, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along with GCC; see the file COPYING. If not, write to the Free 18Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 1902110-1301, USA. */ 20 21#ifndef GCC_GENSUPPORT_H 22#define GCC_GENSUPPORT_H 23 24struct obstack; 25extern struct obstack *rtl_obstack; 26extern const char *in_fname; 27 28extern int init_md_reader_args_cb (int, char **, bool (*)(const char *)); 29extern int init_md_reader_args (int, char **); 30extern rtx read_md_rtx (int *, int *); 31 32extern 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. */ 38extern 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. */ 44extern 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. */ 50extern int maybe_eval_c_test (const char *); 51 52/* This table should not be accessed directly; use maybe_eval_c_test. */ 53struct c_test 54{ 55 const char *expr; 56 int value; 57}; 58 59extern const struct c_test insn_conditions[]; 60extern const size_t n_insn_conditions; 61 62#ifdef __HASHTAB_H__ 63extern hashval_t hash_c_test (const void *); 64extern int cmp_c_test (const void *, const void *); 65#endif 66 67extern int n_comma_elts (const char *); 68extern const char *scan_comma_elt (const char **); 69 70/* Predicate handling: helper functions and data structures. */ 71 72struct 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 89extern struct pred_data *first_predicate; 90extern struct pred_data *lookup_predicate (const char *); 91extern void add_predicate (struct pred_data *); 92 93#define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next) 94 95/* This callback will be invoked whenever an rtl include directive is 96 processed. To be used for creation of the dependency file. */ 97extern void (*include_callback) (const char *); 98 99#endif /* GCC_GENSUPPORT_H */ 100