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1 /* Declarations for rtx-reader support for gen* routines.
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2 Copyright (C) 2000, 2002, 2003, 2004, 2007, 2008
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3 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #ifndef GCC_GENSUPPORT_H
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22 #define GCC_GENSUPPORT_H
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23
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24 struct obstack;
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25 extern struct obstack *rtl_obstack;
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26 extern const char *in_fname;
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27
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28 extern int init_md_reader_args_cb (int, char **, bool (*)(const char *));
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29 extern int init_md_reader_args (int, char **);
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30 extern rtx read_md_rtx (int *, int *);
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31
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32 extern void message_with_line (int, const char *, ...)
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33 ATTRIBUTE_PRINTF_2;
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34
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35 /* Set this to 0 to disable automatic elision of insn patterns which
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36 can never be used in this configuration. See genconditions.c.
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37 Must be set before calling init_md_reader. */
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38 extern int insn_elision;
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39
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40 /* If the C test passed as the argument can be evaluated at compile
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41 time, return its truth value; else return -1. The test must have
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42 appeared somewhere in the machine description when genconditions
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43 was run. */
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44 extern int maybe_eval_c_test (const char *);
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45
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46 /* Add an entry to the table of conditions. Used by genconditions and
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47 by read-rtl.c. */
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48 extern void add_c_test (const char *, int);
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49
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50 /* This structure is used internally by gensupport.c and genconditions.c. */
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51 struct c_test
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52 {
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53 const char *expr;
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54 int value;
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55 };
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56
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57 #ifdef __HASHTAB_H__
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58 extern hashval_t hash_c_test (const void *);
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59 extern int cmp_c_test (const void *, const void *);
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60 extern void traverse_c_tests (htab_trav, void *);
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61 #endif
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62
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63 extern int n_comma_elts (const char *);
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64 extern const char *scan_comma_elt (const char **);
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65
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66 /* Predicate handling: helper functions and data structures. */
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67
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68 struct pred_data
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69 {
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70 struct pred_data *next; /* for iterating over the set of all preds */
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71 const char *name; /* predicate name */
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72 bool special; /* special handling of modes? */
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73
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74 /* data used primarily by genpreds.c */
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75 const char *c_block; /* C test block */
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76 rtx exp; /* RTL test expression */
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77
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78 /* data used primarily by genrecog.c */
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79 enum rtx_code singleton; /* if pred takes only one code, that code */
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80 int num_codes; /* number of codes accepted */
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81 bool allows_non_lvalue; /* if pred allows non-lvalue expressions */
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82 bool allows_non_const; /* if pred allows non-const expressions */
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83 bool codes[NUM_RTX_CODE]; /* set of codes accepted */
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84 };
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85
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86 extern struct pred_data *first_predicate;
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87 extern struct pred_data *lookup_predicate (const char *);
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88 extern void add_predicate_code (struct pred_data *, enum rtx_code);
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89 extern void add_predicate (struct pred_data *);
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90
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91 #define FOR_ALL_PREDICATES(p) for (p = first_predicate; p; p = p->next)
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92
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93 /* This callback will be invoked whenever an rtl include directive is
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94 processed. To be used for creation of the dependency file. */
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95 extern void (*include_callback) (const char *);
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96
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97 #endif /* GCC_GENSUPPORT_H */
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