gensupport.h revision 169689
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 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. */ 44extern 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. */ 48extern void add_c_test (const char *, int); 49 50/* This structure is used internally by gensupport.c and genconditions.c. */ 51struct c_test 52{ 53 const char *expr; 54 int value; 55}; 56 57#ifdef __HASHTAB_H__ 58extern hashval_t hash_c_test (const void *); 59extern int cmp_c_test (const void *, const void *); 60extern void traverse_c_tests (htab_trav, void *); 61#endif 62 63extern int n_comma_elts (const char *); 64extern const char *scan_comma_elt (const char **); 65 66/* Predicate handling: helper functions and data structures. */ 67 68struct 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 85extern struct pred_data *first_predicate; 86extern struct pred_data *lookup_predicate (const char *); 87extern 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. */ 93extern void (*include_callback) (const char *); 94 95#endif /* GCC_GENSUPPORT_H */ 96