1 /* Default common target hook functions.
2 Copyright (C) 2003-2019 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 it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 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 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "tm.h"
24 #include "common/common-target.h"
25 #include "common/common-targhooks.h"
26 #include "opts.h"
27
28 /* Determine the exception handling mechanism for the target. */
29
30 enum unwind_info_type
default_except_unwind_info(struct gcc_options * opts ATTRIBUTE_UNUSED)31 default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
32 {
33 /* Obey the configure switch to turn on sjlj exceptions. */
34 #ifdef CONFIG_SJLJ_EXCEPTIONS
35 if (CONFIG_SJLJ_EXCEPTIONS)
36 return UI_SJLJ;
37 #endif
38
39 /* ??? Change all users to the hook, then poison this. */
40 #ifdef DWARF2_UNWIND_INFO
41 if (DWARF2_UNWIND_INFO)
42 return UI_DWARF2;
43 #endif
44
45 return UI_SJLJ;
46 }
47
48 /* To be used by targets that force dwarf2 unwind enabled. */
49
50 enum unwind_info_type
dwarf2_except_unwind_info(struct gcc_options * opts ATTRIBUTE_UNUSED)51 dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
52 {
53 /* Obey the configure switch to turn on sjlj exceptions. */
54 #ifdef CONFIG_SJLJ_EXCEPTIONS
55 if (CONFIG_SJLJ_EXCEPTIONS)
56 return UI_SJLJ;
57 #endif
58
59 return UI_DWARF2;
60 }
61
62 /* To be used by targets that force sjlj unwind enabled. */
63
64 enum unwind_info_type
sjlj_except_unwind_info(struct gcc_options * opts ATTRIBUTE_UNUSED)65 sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
66 {
67 return UI_SJLJ;
68 }
69
70 /* Default version of TARGET_HANDLE_OPTION. */
71
72 bool
default_target_handle_option(struct gcc_options * opts ATTRIBUTE_UNUSED,struct gcc_options * opts_set ATTRIBUTE_UNUSED,const struct cl_decoded_option * decoded ATTRIBUTE_UNUSED,location_t loc ATTRIBUTE_UNUSED)73 default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
74 struct gcc_options *opts_set ATTRIBUTE_UNUSED,
75 const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED,
76 location_t loc ATTRIBUTE_UNUSED)
77 {
78 return true;
79 }
80
81 /* Default version of TARGET_GET_VALID_OPTION_VALUES. */
82
83 vec<const char *>
default_get_valid_option_values(int,const char *)84 default_get_valid_option_values (int, const char *)
85 {
86 return vec<const char *> ();
87 }
88
89 /* Default version of TARGET_OPTION_VALIDATE_PARAM. */
90
91 bool
default_option_validate_param(const int value ATTRIBUTE_UNUSED,const int param ATTRIBUTE_UNUSED)92 default_option_validate_param (const int value ATTRIBUTE_UNUSED,
93 const int param ATTRIBUTE_UNUSED)
94 {
95 return true;
96 }
97
98 const struct default_options empty_optimization_table[] =
99 {
100 { OPT_LEVELS_NONE, 0, NULL, 0 }
101 };
102