1/* Declarations for rtx-reader support for gen* routines.
2   Copyright (C) 2000-2015 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 3, 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 COPYING3.  If not see
18<http://www.gnu.org/licenses/>.  */
19
20#ifndef GCC_GENSUPPORT_H
21#define GCC_GENSUPPORT_H
22
23struct obstack;
24extern struct obstack *rtl_obstack;
25
26extern bool init_rtx_reader_args_cb (int, char **, bool (*)(const char *));
27extern bool init_rtx_reader_args (int, char **);
28extern rtx read_md_rtx (int *, int *);
29
30/* Set this to 0 to disable automatic elision of insn patterns which
31   can never be used in this configuration.  See genconditions.c.
32   Must be set before calling init_md_reader.  */
33extern int insn_elision;
34
35/* If the C test passed as the argument can be evaluated at compile
36   time, return its truth value; else return -1.  The test must have
37   appeared somewhere in the machine description when genconditions
38   was run.  */
39extern int maybe_eval_c_test (const char *);
40
41/* Add an entry to the table of conditions.  Used by genconditions and
42   by read-rtl.c.  */
43extern void add_c_test (const char *, int);
44
45/* This structure is used internally by gensupport.c and genconditions.c.  */
46struct c_test
47{
48  const char *expr;
49  int value;
50};
51
52#ifdef __HASHTAB_H__
53extern hashval_t hash_c_test (const void *);
54extern int cmp_c_test (const void *, const void *);
55extern void traverse_c_tests (htab_trav, void *);
56#endif
57
58/* Predicate handling: helper functions and data structures.  */
59
60struct pred_data
61{
62  struct pred_data *next;	/* for iterating over the set of all preds */
63  const char *name;		/* predicate name */
64  bool special;			/* special handling of modes? */
65
66  /* data used primarily by genpreds.c */
67  const char *c_block;		/* C test block */
68  rtx exp;			/* RTL test expression */
69
70  /* data used primarily by genrecog.c */
71  enum rtx_code singleton;	/* if pred takes only one code, that code */
72  int num_codes;		/* number of codes accepted */
73  bool allows_non_lvalue;	/* if pred allows non-lvalue expressions */
74  bool allows_non_const;	/* if pred allows non-const expressions */
75  bool codes[NUM_RTX_CODE];	/* set of codes accepted */
76};
77
78extern struct pred_data *first_predicate;
79extern struct pred_data *lookup_predicate (const char *);
80extern void add_predicate_code (struct pred_data *, enum rtx_code);
81extern void add_predicate (struct pred_data *);
82
83#define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
84
85struct pattern_stats
86{
87  /* The largest match_operand, match_operator or match_parallel
88     number found.  */
89  int max_opno;
90
91  /* The largest match_dup, match_op_dup or match_par_dup number found.  */
92  int max_dup_opno;
93
94  /* The largest match_scratch number found.  */
95  int max_scratch_opno;
96
97  /* The number of times match_dup, match_op_dup or match_par_dup appears
98     in the pattern.  */
99  int num_dups;
100
101  /* The number of rtx arguments to the generator function.  */
102  int num_generator_args;
103
104  /* The number of rtx operands in an insn.  */
105  int num_insn_operands;
106
107  /* The number of operand variables that are needed.  */
108  int num_operand_vars;
109};
110
111extern void get_pattern_stats (struct pattern_stats *ranges, rtvec vec);
112
113#endif /* GCC_GENSUPPORT_H */
114