1/* Definitions for code generation pass of GNU compiler.
2   Copyright (C) 2001-2015 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 3, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for 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_LIBFUNCS_H
21#define GCC_LIBFUNCS_H
22
23#include "hashtab.h"
24
25/* Enumeration of indexes into libfunc_table.  */
26enum libfunc_index
27{
28  LTI_abort,
29  LTI_memcpy,
30  LTI_memmove,
31  LTI_memcmp,
32  LTI_memset,
33  LTI_setbits,
34
35  LTI_setjmp,
36  LTI_longjmp,
37  LTI_unwind_sjlj_register,
38  LTI_unwind_sjlj_unregister,
39
40  LTI_profile_function_entry,
41  LTI_profile_function_exit,
42
43  LTI_synchronize,
44
45  LTI_gcov_flush,
46
47  LTI_MAX
48};
49
50/* Information about an optab-related libfunc.  The op field is logically
51   an enum optab_d, and the mode fields are logically machine_mode.
52   However, in the absence of forward-declared enums, there's no practical
53   benefit of pulling in the defining headers.
54
55   We use the same hashtable for normal optabs and conversion optabs.  In
56   the first case mode2 is forced to VOIDmode.  */
57
58struct GTY((for_user)) libfunc_entry {
59  int op, mode1, mode2;
60  rtx libfunc;
61};
62
63/* Descriptor for libfunc_entry.  */
64
65struct libfunc_hasher : ggc_hasher<libfunc_entry *>
66{
67  static hashval_t hash (libfunc_entry *);
68  static bool equal (libfunc_entry *, libfunc_entry *);
69};
70
71/* Target-dependent globals.  */
72struct GTY(()) target_libfuncs {
73  /* SYMBOL_REF rtx's for the library functions that are called
74     implicitly and not via optabs.  */
75  rtx x_libfunc_table[LTI_MAX];
76
77  /* Hash table used to convert declarations into nodes.  */
78  hash_table<libfunc_hasher> *GTY(()) x_libfunc_hash;
79};
80
81extern GTY(()) struct target_libfuncs default_target_libfuncs;
82#if SWITCHABLE_TARGET
83extern struct target_libfuncs *this_target_libfuncs;
84#else
85#define this_target_libfuncs (&default_target_libfuncs)
86#endif
87
88#define libfunc_table \
89  (this_target_libfuncs->x_libfunc_table)
90
91/* Accessor macros for libfunc_table.  */
92
93#define abort_libfunc	(libfunc_table[LTI_abort])
94#define memcpy_libfunc	(libfunc_table[LTI_memcpy])
95#define memmove_libfunc	(libfunc_table[LTI_memmove])
96#define memcmp_libfunc	(libfunc_table[LTI_memcmp])
97#define memset_libfunc	(libfunc_table[LTI_memset])
98#define setbits_libfunc	(libfunc_table[LTI_setbits])
99
100#define setjmp_libfunc	(libfunc_table[LTI_setjmp])
101#define longjmp_libfunc	(libfunc_table[LTI_longjmp])
102#define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register])
103#define unwind_sjlj_unregister_libfunc \
104  (libfunc_table[LTI_unwind_sjlj_unregister])
105
106#define profile_function_entry_libfunc	(libfunc_table[LTI_profile_function_entry])
107#define profile_function_exit_libfunc	(libfunc_table[LTI_profile_function_exit])
108
109#define synchronize_libfunc	(libfunc_table[LTI_synchronize])
110
111#define gcov_flush_libfunc	(libfunc_table[LTI_gcov_flush])
112
113/* In explow.c */
114extern void set_stack_check_libfunc (const char *);
115
116#endif /* GCC_LIBFUNCS_H */
117