1 /* Declarations for rtx-reader support for gen* routines. 2 Copyright (C) 2000, 2002, 2003, 2004, 2007, 2008, 2010 3 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #ifndef GCC_GENSUPPORT_H 22 #define GCC_GENSUPPORT_H 23 24 struct obstack; 25 extern struct obstack *rtl_obstack; 26 27 extern bool init_rtx_reader_args_cb (int, char **, bool (*)(const char *)); 28 extern bool init_rtx_reader_args (int, char **); 29 extern rtx read_md_rtx (int *, int *); 30 31 /* Set this to 0 to disable automatic elision of insn patterns which 32 can never be used in this configuration. See genconditions.c. 33 Must be set before calling init_md_reader. */ 34 extern int insn_elision; 35 36 /* If the C test passed as the argument can be evaluated at compile 37 time, return its truth value; else return -1. The test must have 38 appeared somewhere in the machine description when genconditions 39 was run. */ 40 extern int maybe_eval_c_test (const char *); 41 42 /* Add an entry to the table of conditions. Used by genconditions and 43 by read-rtl.c. */ 44 extern void add_c_test (const char *, int); 45 46 /* This structure is used internally by gensupport.c and genconditions.c. */ 47 struct c_test 48 { 49 const char *expr; 50 int value; 51 }; 52 53 #ifdef __HASHTAB_H__ 54 extern hashval_t hash_c_test (const void *); 55 extern int cmp_c_test (const void *, const void *); 56 extern void traverse_c_tests (htab_trav, void *); 57 #endif 58 59 /* Predicate handling: helper functions and data structures. */ 60 61 struct pred_data 62 { 63 struct pred_data *next; /* for iterating over the set of all preds */ 64 const char *name; /* predicate name */ 65 bool special; /* special handling of modes? */ 66 67 /* data used primarily by genpreds.c */ 68 const char *c_block; /* C test block */ 69 rtx exp; /* RTL test expression */ 70 71 /* data used primarily by genrecog.c */ 72 enum rtx_code singleton; /* if pred takes only one code, that code */ 73 int num_codes; /* number of codes accepted */ 74 bool allows_non_lvalue; /* if pred allows non-lvalue expressions */ 75 bool allows_non_const; /* if pred allows non-const expressions */ 76 bool codes[NUM_RTX_CODE]; /* set of codes accepted */ 77 }; 78 79 extern struct pred_data *first_predicate; 80 extern struct pred_data *lookup_predicate (const char *); 81 extern void add_predicate_code (struct pred_data *, enum rtx_code); 82 extern void add_predicate (struct pred_data *); 83 84 #define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next) 85 86 struct pattern_stats 87 { 88 /* The largest match_operand, match_operator or match_parallel 89 number found. */ 90 int max_opno; 91 92 /* The largest match_dup, match_op_dup or match_par_dup number found. */ 93 int max_dup_opno; 94 95 /* The largest match_scratch number found. */ 96 int max_scratch_opno; 97 98 /* The number of times match_dup, match_op_dup or match_par_dup appears 99 in the pattern. */ 100 int num_dups; 101 102 /* The number of rtx arguments to the generator function. */ 103 int num_generator_args; 104 105 /* The number of rtx operands in an insn. */ 106 int num_insn_operands; 107 108 /* The number of operand variables that are needed. */ 109 int num_operand_vars; 110 }; 111 112 extern void get_pattern_stats (struct pattern_stats *ranges, rtvec vec); 113 114 #endif /* GCC_GENSUPPORT_H */ 115