1 | /* Definitions for code generation pass of GNU compiler. |
2 | Copyright (C) 2001-2023 Free Software Foundation, Inc. |
3 | |
4 | This file is part of GCC. |
5 | |
6 | GCC is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by |
8 | the Free Software Foundation; either version 3, or (at your option) |
9 | any later version. |
10 | |
11 | GCC is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | GNU General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU General Public License |
17 | along 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 | |
24 | /* Enumeration of indexes into libfunc_table. */ |
25 | enum libfunc_index |
26 | { |
27 | LTI_unwind_sjlj_register, |
28 | LTI_unwind_sjlj_unregister, |
29 | LTI_synchronize, |
30 | LTI_MAX |
31 | }; |
32 | |
33 | /* Information about an optab-related libfunc. The op field is logically |
34 | an enum optab_d, and the mode fields are logically machine_mode. |
35 | However, in the absence of forward-declared enums, there's no practical |
36 | benefit of pulling in the defining headers. |
37 | |
38 | We use the same hashtable for normal optabs and conversion optabs. In |
39 | the first case mode2 is forced to VOIDmode. */ |
40 | |
41 | struct GTY((for_user)) libfunc_entry { |
42 | int op, mode1, mode2; |
43 | rtx libfunc; |
44 | }; |
45 | |
46 | /* Descriptor for libfunc_entry. */ |
47 | |
48 | struct libfunc_hasher : ggc_ptr_hash<libfunc_entry> |
49 | { |
50 | static hashval_t hash (libfunc_entry *); |
51 | static bool equal (libfunc_entry *, libfunc_entry *); |
52 | }; |
53 | |
54 | /* Target-dependent globals. */ |
55 | struct GTY(()) target_libfuncs { |
56 | /* SYMBOL_REF rtx's for the library functions that are called |
57 | implicitly and not via optabs. */ |
58 | rtx x_libfunc_table[LTI_MAX]; |
59 | |
60 | /* Hash table used to convert declarations into nodes. */ |
61 | hash_table<libfunc_hasher> *GTY(()) x_libfunc_hash; |
62 | }; |
63 | |
64 | extern GTY(()) struct target_libfuncs default_target_libfuncs; |
65 | #if SWITCHABLE_TARGET |
66 | extern struct target_libfuncs *this_target_libfuncs; |
67 | #else |
68 | #define this_target_libfuncs (&default_target_libfuncs) |
69 | #endif |
70 | |
71 | #define libfunc_table \ |
72 | (this_target_libfuncs->x_libfunc_table) |
73 | |
74 | /* Accessor macros for libfunc_table. */ |
75 | |
76 | #define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register]) |
77 | #define unwind_sjlj_unregister_libfunc \ |
78 | (libfunc_table[LTI_unwind_sjlj_unregister]) |
79 | #define synchronize_libfunc (libfunc_table[LTI_synchronize]) |
80 | |
81 | /* In explow.cc */ |
82 | extern void set_stack_check_libfunc (const char *); |
83 | |
84 | #endif /* GCC_LIBFUNCS_H */ |
85 | |