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111
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1 /* Default common target hook functions.
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131
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2 Copyright (C) 2003-2018 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "tm.h"
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24 #include "common/common-target.h"
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25 #include "common/common-targhooks.h"
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131
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26 #include "opts.h"
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111
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27
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28 /* Determine the exception handling mechanism for the target. */
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29
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30 enum unwind_info_type
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31 default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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32 {
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33 /* Obey the configure switch to turn on sjlj exceptions. */
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34 #ifdef CONFIG_SJLJ_EXCEPTIONS
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35 if (CONFIG_SJLJ_EXCEPTIONS)
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36 return UI_SJLJ;
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37 #endif
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38
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39 /* ??? Change all users to the hook, then poison this. */
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40 #ifdef DWARF2_UNWIND_INFO
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41 if (DWARF2_UNWIND_INFO)
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42 return UI_DWARF2;
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43 #endif
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44
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45 return UI_SJLJ;
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46 }
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47
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48 /* To be used by targets that force dwarf2 unwind enabled. */
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49
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50 enum unwind_info_type
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51 dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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52 {
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53 /* Obey the configure switch to turn on sjlj exceptions. */
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54 #ifdef CONFIG_SJLJ_EXCEPTIONS
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55 if (CONFIG_SJLJ_EXCEPTIONS)
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56 return UI_SJLJ;
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57 #endif
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58
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59 return UI_DWARF2;
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60 }
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61
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62 /* To be used by targets that force sjlj unwind enabled. */
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63
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64 enum unwind_info_type
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65 sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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66 {
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67 return UI_SJLJ;
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68 }
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69
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70 /* Default version of TARGET_HANDLE_OPTION. */
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71
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72 bool
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73 default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
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74 struct gcc_options *opts_set ATTRIBUTE_UNUSED,
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75 const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED,
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76 location_t loc ATTRIBUTE_UNUSED)
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77 {
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78 return true;
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79 }
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80
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131
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81 /* Default version of TARGET_GET_VALID_OPTION_VALUES. */
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82
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83 vec<const char *>
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84 default_get_valid_option_values (int, const char *)
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85 {
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86 return vec<const char *> ();
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87 }
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88
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89 /* Default version of TARGET_OPTION_VALIDATE_PARAM. */
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90
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91 bool
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92 default_option_validate_param (const int value ATTRIBUTE_UNUSED,
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93 const int param ATTRIBUTE_UNUSED)
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94 {
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95 return true;
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96 }
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97
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111
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98 const struct default_options empty_optimization_table[] =
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99 {
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100 { OPT_LEVELS_NONE, 0, NULL, 0 }
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101 };
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