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677f3fa8 | 1 | /* Common hooks for ATMEL AVR. |
a5544970 | 2 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
677f3fa8 JM |
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 | #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-target-def.h" | |
26 | ||
27 | /* Implement TARGET_OPTION_OPTIMIZATION_TABLE. */ | |
28 | static const struct default_options avr_option_optimization_table[] = | |
29 | { | |
19416210 GJL |
30 | // With -fdelete-null-pointer-checks option, the compiler assumes |
31 | // that dereferencing of a null pointer would halt the program. | |
32 | // For AVR this assumption is not true and a program can safely | |
33 | // dereference null pointers. Changes made by this option may not | |
34 | // work properly for AVR. So disable this option. | |
35 | { OPT_LEVELS_ALL, OPT_fdelete_null_pointer_checks, NULL, 0 }, | |
90b1c81d GJL |
36 | // The only effect of -fcaller-saves might be that it triggers |
37 | // a frame without need when it tries to be smart around calls. | |
38 | { OPT_LEVELS_ALL, OPT_fcaller_saves, NULL, 0 }, | |
63866e04 | 39 | { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_mgas_isr_prologues, NULL, 1 }, |
dcbe9170 | 40 | { OPT_LEVELS_1_PLUS, OPT_mmain_is_OS_task, NULL, 1 }, |
677f3fa8 JM |
41 | { OPT_LEVELS_NONE, 0, NULL, 0 } |
42 | }; | |
43 | ||
44 | #undef TARGET_OPTION_OPTIMIZATION_TABLE | |
45 | #define TARGET_OPTION_OPTIMIZATION_TABLE avr_option_optimization_table | |
46 | ||
47 | #undef TARGET_EXCEPT_UNWIND_INFO | |
48 | #define TARGET_EXCEPT_UNWIND_INFO sjlj_except_unwind_info | |
49 | ||
50 | struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER; |