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218e3e4e | 1 | /* Common hooks for ARM. |
f1717362 | 2 | Copyright (C) 1991-2016 Free Software Foundation, Inc. |
218e3e4e | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published | |
8 | by the Free Software Foundation; either version 3, or (at your | |
9 | option) any later version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT | |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
14 | 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 "tm_p.h" | |
25 | #include "common/common-target.h" | |
26 | #include "common/common-target-def.h" | |
27 | #include "opts.h" | |
28 | #include "flags.h" | |
29 | ||
30 | /* Set default optimization options. */ | |
31 | static const struct default_options arm_option_optimization_table[] = | |
32 | { | |
33 | /* Enable section anchors by default at -O1 or higher. */ | |
34 | { OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 }, | |
35 | { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 }, | |
84a1059b | 36 | { OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 }, |
218e3e4e | 37 | { OPT_LEVELS_NONE, 0, NULL, 0 } |
38 | }; | |
39 | ||
40 | /* Implement TARGET_EXCEPT_UNWIND_INFO. */ | |
41 | ||
42 | enum unwind_info_type | |
43 | arm_except_unwind_info (struct gcc_options *opts) | |
44 | { | |
45 | /* Honor the --enable-sjlj-exceptions configure switch. */ | |
46 | #ifdef CONFIG_SJLJ_EXCEPTIONS | |
47 | if (CONFIG_SJLJ_EXCEPTIONS) | |
48 | return UI_SJLJ; | |
49 | #endif | |
50 | ||
51 | /* If not using ARM EABI unwind tables... */ | |
52 | if (ARM_UNWIND_INFO) | |
53 | { | |
54 | /* For simplicity elsewhere in this file, indicate that all unwind | |
55 | info is disabled if we're not emitting unwind tables. */ | |
56 | if (!opts->x_flag_exceptions && !opts->x_flag_unwind_tables) | |
57 | return UI_NONE; | |
58 | else | |
59 | return UI_TARGET; | |
60 | } | |
61 | ||
62 | /* ... we use sjlj exceptions for backwards compatibility. */ | |
63 | return UI_SJLJ; | |
64 | } | |
65 | ||
b7188fad | 66 | #define ARM_CPU_NAME_LENGTH 20 |
67 | ||
68 | /* Truncate NAME at the first '.' character seen, or return | |
69 | NAME unmodified. */ | |
70 | ||
71 | const char * | |
72 | arm_rewrite_selected_cpu (const char *name) | |
73 | { | |
74 | static char output_buf[ARM_CPU_NAME_LENGTH + 1] = {0}; | |
75 | char *arg_pos; | |
76 | ||
77 | strncpy (output_buf, name, ARM_CPU_NAME_LENGTH); | |
78 | arg_pos = strchr (output_buf, '.'); | |
79 | ||
80 | /* If we found a '.' truncate the entry at that point. */ | |
81 | if (arg_pos) | |
82 | *arg_pos = '\0'; | |
83 | ||
84 | return output_buf; | |
85 | } | |
86 | ||
87 | /* Called by the driver to rewrite a name passed to the -mcpu | |
88 | argument in preparation to be passed to the assembler. The | |
7b2c45ae | 89 | names passed from the command line will be in ARGV, we want |
90 | to use the right-most argument, which should be in | |
91 | ARGV[ARGC - 1]. ARGC should always be greater than 0. */ | |
b7188fad | 92 | |
93 | const char * | |
94 | arm_rewrite_mcpu (int argc, const char **argv) | |
95 | { | |
7b2c45ae | 96 | gcc_assert (argc); |
97 | return arm_rewrite_selected_cpu (argv[argc - 1]); | |
b7188fad | 98 | } |
99 | ||
100 | #undef ARM_CPU_NAME_LENGTH | |
101 | ||
102 | ||
218e3e4e | 103 | #undef TARGET_DEFAULT_TARGET_FLAGS |
104 | #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT | MASK_SCHED_PROLOG) | |
105 | ||
106 | #undef TARGET_OPTION_OPTIMIZATION_TABLE | |
107 | #define TARGET_OPTION_OPTIMIZATION_TABLE arm_option_optimization_table | |
108 | ||
109 | #undef TARGET_EXCEPT_UNWIND_INFO | |
110 | #define TARGET_EXCEPT_UNWIND_INFO arm_except_unwind_info | |
111 | ||
112 | struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER; |