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1 /* Default common target hook functions.
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2 Copyright (C) 2003-2017 Free Software Foundation, Inc.
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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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26
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27 /* Determine the exception handling mechanism for the target. */
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28
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29 enum unwind_info_type
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30 default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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31 {
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32 /* Obey the configure switch to turn on sjlj exceptions. */
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33 #ifdef CONFIG_SJLJ_EXCEPTIONS
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34 if (CONFIG_SJLJ_EXCEPTIONS)
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35 return UI_SJLJ;
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36 #endif
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37
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38 /* ??? Change all users to the hook, then poison this. */
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39 #ifdef DWARF2_UNWIND_INFO
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40 if (DWARF2_UNWIND_INFO)
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41 return UI_DWARF2;
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42 #endif
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43
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44 return UI_SJLJ;
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45 }
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46
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47 /* To be used by targets that force dwarf2 unwind enabled. */
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48
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49 enum unwind_info_type
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50 dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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51 {
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52 /* Obey the configure switch to turn on sjlj exceptions. */
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53 #ifdef CONFIG_SJLJ_EXCEPTIONS
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54 if (CONFIG_SJLJ_EXCEPTIONS)
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55 return UI_SJLJ;
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56 #endif
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57
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58 return UI_DWARF2;
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59 }
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60
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61 /* To be used by targets that force sjlj unwind enabled. */
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62
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63 enum unwind_info_type
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64 sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
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65 {
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66 return UI_SJLJ;
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67 }
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68
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69 /* Default version of TARGET_HANDLE_OPTION. */
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70
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71 bool
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72 default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
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73 struct gcc_options *opts_set ATTRIBUTE_UNUSED,
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74 const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED,
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75 location_t loc ATTRIBUTE_UNUSED)
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76 {
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77 return true;
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78 }
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79
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80 const struct default_options empty_optimization_table[] =
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81 {
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82 { OPT_LEVELS_NONE, 0, NULL, 0 }
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83 };
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