Mercurial > hg > CbC > CbC_gcc
annotate gcc/opts.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 22 Mar 2011 17:18:12 +0900 |
parents | b7f97abdc517 |
children | 04ced10e8804 |
rev | line source |
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0 | 1 /* Command line option handling. |
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2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
0 | 3 Free Software Foundation, Inc. |
4 Contributed by Neil Booth. | |
5 | |
6 This file is part of GCC. | |
7 | |
8 GCC is free software; you can redistribute it and/or modify it under | |
9 the terms of the GNU General Public License as published by the Free | |
10 Software Foundation; either version 3, or (at your option) any later | |
11 version. | |
12 | |
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 #include "config.h" | |
23 #include "system.h" | |
24 #include "intl.h" | |
25 #include "coretypes.h" | |
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26 #include "tm.h" /* Needed by rtl.h and used for STACK_CHECK_BUILTIN, |
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27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS, |
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28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */ |
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29 #include "rtl.h" /* Needed by insn-attr.h. */ |
0 | 30 #include "opts.h" |
31 #include "options.h" | |
32 #include "flags.h" | |
33 #include "params.h" | |
34 #include "diagnostic.h" | |
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35 #include "opts-diagnostic.h" |
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36 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */ |
0 | 37 #include "target.h" |
38 | |
39 /* Parse the -femit-struct-debug-detailed option value | |
40 and set the flag variables. */ | |
41 | |
42 #define MATCH( prefix, string ) \ | |
43 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \ | |
44 ? ((string += sizeof prefix - 1), 1) : 0) | |
45 | |
46 void | |
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47 set_struct_debug_option (struct gcc_options *opts, location_t loc, |
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48 const char *spec) |
0 | 49 { |
50 /* various labels for comparison */ | |
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51 static const char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:"; |
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52 static const char ord_lbl[] = "ord:", gen_lbl[] = "gen:"; |
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53 static const char none_lbl[] = "none", any_lbl[] = "any"; |
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54 static const char base_lbl[] = "base", sys_lbl[] = "sys"; |
0 | 55 |
56 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY; | |
57 /* Default is to apply to as much as possible. */ | |
58 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS; | |
59 int ord = 1, gen = 1; | |
60 | |
61 /* What usage? */ | |
62 if (MATCH (dfn_lbl, spec)) | |
63 usage = DINFO_USAGE_DFN; | |
64 else if (MATCH (dir_lbl, spec)) | |
65 usage = DINFO_USAGE_DIR_USE; | |
66 else if (MATCH (ind_lbl, spec)) | |
67 usage = DINFO_USAGE_IND_USE; | |
68 | |
69 /* Generics or not? */ | |
70 if (MATCH (ord_lbl, spec)) | |
71 gen = 0; | |
72 else if (MATCH (gen_lbl, spec)) | |
73 ord = 0; | |
74 | |
75 /* What allowable environment? */ | |
76 if (MATCH (none_lbl, spec)) | |
77 files = DINFO_STRUCT_FILE_NONE; | |
78 else if (MATCH (any_lbl, spec)) | |
79 files = DINFO_STRUCT_FILE_ANY; | |
80 else if (MATCH (sys_lbl, spec)) | |
81 files = DINFO_STRUCT_FILE_SYS; | |
82 else if (MATCH (base_lbl, spec)) | |
83 files = DINFO_STRUCT_FILE_BASE; | |
84 else | |
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85 error_at (loc, |
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86 "argument %qs to %<-femit-struct-debug-detailed%> " |
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87 "not recognized", |
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88 spec); |
0 | 89 |
90 /* Effect the specification. */ | |
91 if (usage == DINFO_USAGE_NUM_ENUMS) | |
92 { | |
93 if (ord) | |
94 { | |
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95 opts->x_debug_struct_ordinary[DINFO_USAGE_DFN] = files; |
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96 opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files; |
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97 opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] = files; |
0 | 98 } |
99 if (gen) | |
100 { | |
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101 opts->x_debug_struct_generic[DINFO_USAGE_DFN] = files; |
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102 opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] = files; |
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103 opts->x_debug_struct_generic[DINFO_USAGE_IND_USE] = files; |
0 | 104 } |
105 } | |
106 else | |
107 { | |
108 if (ord) | |
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109 opts->x_debug_struct_ordinary[usage] = files; |
0 | 110 if (gen) |
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111 opts->x_debug_struct_generic[usage] = files; |
0 | 112 } |
113 | |
114 if (*spec == ',') | |
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115 set_struct_debug_option (opts, loc, spec+1); |
0 | 116 else |
117 { | |
118 /* No more -femit-struct-debug-detailed specifications. | |
119 Do final checks. */ | |
120 if (*spec != '\0') | |
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121 error_at (loc, |
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122 "argument %qs to %<-femit-struct-debug-detailed%> unknown", |
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123 spec); |
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124 if (opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] |
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125 < opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] |
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126 || opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] |
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127 < opts->x_debug_struct_generic[DINFO_USAGE_IND_USE]) |
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128 error_at (loc, |
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129 "%<-femit-struct-debug-detailed=dir:...%> must allow " |
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130 "at least as much as " |
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131 "%<-femit-struct-debug-detailed=ind:...%>"); |
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132 } |
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133 } |
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134 |
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135 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */ |
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136 |
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137 static void |
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138 vect_set_verbosity_level (struct gcc_options *opts, int val) |
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139 { |
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140 if (val < MAX_VERBOSITY_LEVEL) |
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141 opts->x_user_vect_verbosity_level = (enum vect_verbosity_levels) val; |
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142 else |
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143 opts->x_user_vect_verbosity_level |
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144 = (enum vect_verbosity_levels) (MAX_VERBOSITY_LEVEL - 1); |
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145 } |
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146 |
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147 |
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148 /* Strip off a legitimate source ending from the input string NAME of |
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149 length LEN. Rather than having to know the names used by all of |
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150 our front ends, we strip off an ending of a period followed by |
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151 up to five characters. (Java uses ".class".) */ |
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152 |
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153 void |
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154 strip_off_ending (char *name, int len) |
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155 { |
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156 int i; |
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157 for (i = 2; i < 6 && len > i; i++) |
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158 { |
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159 if (name[len - i] == '.') |
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160 { |
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161 name[len - i] = '\0'; |
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162 break; |
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163 } |
0 | 164 } |
165 } | |
166 | |
167 /* Find the base name of a path, stripping off both directories and | |
168 a single final extension. */ | |
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169 int |
0 | 170 base_of_path (const char *path, const char **base_out) |
171 { | |
172 const char *base = path; | |
173 const char *dot = 0; | |
174 const char *p = path; | |
175 char c = *p; | |
176 while (c) | |
177 { | |
178 if (IS_DIR_SEPARATOR(c)) | |
179 { | |
180 base = p + 1; | |
181 dot = 0; | |
182 } | |
183 else if (c == '.') | |
184 dot = p; | |
185 c = *++p; | |
186 } | |
187 if (!dot) | |
188 dot = p; | |
189 *base_out = base; | |
190 return dot - base; | |
191 } | |
192 | |
193 /* What to print when a switch has no documentation. */ | |
194 static const char undocumented_msg[] = N_("This switch lacks documentation"); | |
195 | |
196 typedef char *char_p; /* For DEF_VEC_P. */ | |
197 DEF_VEC_P(char_p); | |
198 DEF_VEC_ALLOC_P(char_p,heap); | |
199 | |
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200 static void handle_param (struct gcc_options *opts, |
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201 struct gcc_options *opts_set, location_t loc, |
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202 const char *carg); |
0 | 203 static void set_debug_level (enum debug_info_type type, int extended, |
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204 const char *arg, struct gcc_options *opts, |
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205 struct gcc_options *opts_set, |
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206 location_t loc); |
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207 static void set_fast_math_flags (struct gcc_options *opts, int set); |
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208 static void decode_d_option (const char *arg, struct gcc_options *opts, |
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209 location_t loc, diagnostic_context *dc); |
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210 static void set_unsafe_math_optimizations_flags (struct gcc_options *opts, |
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211 int set); |
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212 static void enable_warning_as_error (const char *arg, int value, |
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213 unsigned int lang_mask, |
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214 const struct cl_option_handlers *handlers, |
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215 struct gcc_options *opts, |
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216 struct gcc_options *opts_set, |
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217 location_t loc, |
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218 diagnostic_context *dc); |
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219 |
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220 /* Handle a back-end option; arguments and return value as for |
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221 handle_option. */ |
0 | 222 |
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223 bool |
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224 target_handle_option (struct gcc_options *opts, |
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225 struct gcc_options *opts_set, |
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226 const struct cl_decoded_option *decoded, |
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227 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind, |
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228 location_t loc ATTRIBUTE_UNUSED, |
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229 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED, |
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230 diagnostic_context *dc) |
0 | 231 { |
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232 gcc_assert (opts == &global_options); |
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233 gcc_assert (opts_set == &global_options_set); |
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234 gcc_assert (dc == global_dc); |
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235 gcc_assert (decoded->canonical_option_num_elements <= 2); |
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236 gcc_assert (kind == DK_UNSPECIFIED); |
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237 /* Although the location is not passed down to |
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238 targetm.handle_option, do not make assertions about its value; |
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239 options may come from optimize attributes and having the correct |
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240 location in the handler is not generally important. */ |
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241 return targetm.handle_option (decoded->opt_index, decoded->arg, |
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242 decoded->value); |
0 | 243 } |
244 | |
245 /* Add comma-separated strings to a char_p vector. */ | |
246 | |
247 static void | |
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248 add_comma_separated_to_vector (void **pvec, const char *arg) |
0 | 249 { |
250 char *tmp; | |
251 char *r; | |
252 char *w; | |
253 char *token_start; | |
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254 VEC(char_p,heap) *vec = (VEC(char_p,heap) *) *pvec; |
0 | 255 |
256 /* We never free this string. */ | |
257 tmp = xstrdup (arg); | |
258 | |
259 r = tmp; | |
260 w = tmp; | |
261 token_start = tmp; | |
262 | |
263 while (*r != '\0') | |
264 { | |
265 if (*r == ',') | |
266 { | |
267 *w++ = '\0'; | |
268 ++r; | |
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269 VEC_safe_push (char_p, heap, vec, token_start); |
0 | 270 token_start = w; |
271 } | |
272 if (*r == '\\' && r[1] == ',') | |
273 { | |
274 *w++ = ','; | |
275 r += 2; | |
276 } | |
277 else | |
278 *w++ = *r++; | |
279 } | |
280 if (*token_start != '\0') | |
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281 VEC_safe_push (char_p, heap, vec, token_start); |
0 | 282 |
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283 *pvec = vec; |
0 | 284 } |
285 | |
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286 /* Initialize OPTS and OPTS_SET before using them in parsing options. */ |
0 | 287 |
288 void | |
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289 init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set) |
0 | 290 { |
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291 size_t num_params = get_num_compiler_params (); |
0 | 292 |
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293 *opts = global_options_init; |
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294 memset (opts_set, 0, sizeof (*opts_set)); |
0 | 295 |
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296 opts->x_param_values = XNEWVEC (int, num_params); |
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297 opts_set->x_param_values = XCNEWVEC (int, num_params); |
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298 init_param_values (opts->x_param_values); |
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299 |
0 | 300 /* Use priority coloring if cover classes is not defined for the |
301 target. */ | |
302 if (targetm.ira_cover_classes == NULL) | |
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303 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY; |
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304 |
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305 /* Initialize whether `char' is signed. */ |
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306 opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR; |
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307 /* Set this to a special "uninitialized" value. The actual default |
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308 is set after target options have been processed. */ |
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309 opts->x_flag_short_enums = 2; |
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310 |
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311 /* Initialize target_flags before targetm.target_option.optimization |
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312 so the latter can modify it. */ |
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313 opts->x_target_flags = targetm.default_target_flags; |
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314 |
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315 /* Some targets have ABI-specified unwind tables. */ |
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316 opts->x_flag_unwind_tables = targetm.unwind_tables_default; |
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317 |
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318 /* Some targets have other target-specific initialization. */ |
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319 targetm.target_option.init_struct (opts); |
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320 } |
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321 |
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322 /* If indicated by the optimization level LEVEL (-Os if SIZE is set, |
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323 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and |
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324 OPTS_SET, diagnostic context DC, location LOC, with language mask |
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325 LANG_MASK and option handlers HANDLERS. */ |
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326 |
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327 static void |
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328 maybe_default_option (struct gcc_options *opts, |
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329 struct gcc_options *opts_set, |
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330 const struct default_options *default_opt, |
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331 int level, bool size, bool fast, |
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332 unsigned int lang_mask, |
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333 const struct cl_option_handlers *handlers, |
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334 location_t loc, |
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335 diagnostic_context *dc) |
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336 { |
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337 const struct cl_option *option = &cl_options[default_opt->opt_index]; |
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338 bool enabled; |
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339 |
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340 if (size) |
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341 gcc_assert (level == 2); |
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342 if (fast) |
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343 gcc_assert (level == 3); |
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344 |
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345 switch (default_opt->levels) |
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346 { |
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347 case OPT_LEVELS_ALL: |
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348 enabled = true; |
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349 break; |
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350 |
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351 case OPT_LEVELS_0_ONLY: |
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352 enabled = (level == 0); |
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353 break; |
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354 |
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355 case OPT_LEVELS_1_PLUS: |
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356 enabled = (level >= 1); |
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357 break; |
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358 |
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359 case OPT_LEVELS_1_PLUS_SPEED_ONLY: |
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360 enabled = (level >= 1 && !size); |
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361 break; |
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362 |
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363 case OPT_LEVELS_2_PLUS: |
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364 enabled = (level >= 2); |
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365 break; |
0 | 366 |
67
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367 case OPT_LEVELS_2_PLUS_SPEED_ONLY: |
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368 enabled = (level >= 2 && !size); |
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369 break; |
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370 |
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371 case OPT_LEVELS_3_PLUS: |
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372 enabled = (level >= 3); |
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373 break; |
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374 |
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375 case OPT_LEVELS_3_PLUS_AND_SIZE: |
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376 enabled = (level >= 3 || size); |
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377 break; |
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378 |
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379 case OPT_LEVELS_SIZE: |
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380 enabled = size; |
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381 break; |
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382 |
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383 case OPT_LEVELS_FAST: |
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384 enabled = fast; |
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385 break; |
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386 |
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387 case OPT_LEVELS_NONE: |
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388 default: |
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389 gcc_unreachable (); |
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390 } |
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391 |
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392 if (enabled) |
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393 handle_generated_option (opts, opts_set, default_opt->opt_index, |
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394 default_opt->arg, default_opt->value, |
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395 lang_mask, DK_UNSPECIFIED, loc, |
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396 handlers, dc); |
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397 else if (default_opt->arg == NULL |
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398 && !(option->flags & CL_REJECT_NEGATIVE)) |
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399 handle_generated_option (opts, opts_set, default_opt->opt_index, |
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400 default_opt->arg, !default_opt->value, |
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401 lang_mask, DK_UNSPECIFIED, loc, |
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402 handlers, dc); |
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403 } |
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404 |
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405 /* As indicated by the optimization level LEVEL (-Os if SIZE is set, |
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406 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to |
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407 OPTS and OPTS_SET, diagnostic context DC, location LOC, with |
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408 language mask LANG_MASK and option handlers HANDLERS. */ |
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409 |
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410 static void |
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411 maybe_default_options (struct gcc_options *opts, |
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412 struct gcc_options *opts_set, |
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413 const struct default_options *default_opts, |
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414 int level, bool size, bool fast, |
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415 unsigned int lang_mask, |
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416 const struct cl_option_handlers *handlers, |
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417 location_t loc, |
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418 diagnostic_context *dc) |
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419 { |
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420 size_t i; |
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421 |
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422 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++) |
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423 maybe_default_option (opts, opts_set, &default_opts[i], |
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424 level, size, fast, lang_mask, handlers, loc, dc); |
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425 } |
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426 |
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427 /* Table of options enabled by default at different levels. */ |
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428 |
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429 static const struct default_options default_options_table[] = |
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430 { |
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431 /* -O1 optimizations. */ |
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432 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 }, |
0 | 433 #ifdef DELAY_SLOTS |
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434 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 }, |
0 | 435 #endif |
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436 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 }, |
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437 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 }, |
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438 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 }, |
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439 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 }, |
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440 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 }, |
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441 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 }, |
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442 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 }, |
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443 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 }, |
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444 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 }, |
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445 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 }, |
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446 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 }, |
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447 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 }, |
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448 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 }, |
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449 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 }, |
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450 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 }, |
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451 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 }, |
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452 { OPT_LEVELS_1_PLUS, OPT_ftree_sra, NULL, 1 }, |
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453 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 }, |
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454 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 }, |
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455 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 }, |
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456 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 }, |
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457 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 }, |
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458 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 }, |
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459 { OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 }, |
0 | 460 |
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461 /* -O2 optimizations. */ |
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462 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 }, |
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463 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 }, |
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464 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 }, |
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465 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 }, |
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466 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 }, |
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467 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 }, |
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468 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 }, |
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469 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 }, |
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470 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 }, |
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471 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 }, |
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472 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 }, |
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473 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 }, |
0 | 474 #ifdef INSN_SCHEDULING |
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475 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */ |
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476 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 }, |
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477 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 }, |
0 | 478 #endif |
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479 { OPT_LEVELS_2_PLUS, OPT_fregmove, NULL, 1 }, |
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480 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 }, |
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481 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 }, |
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482 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 }, |
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483 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 }, |
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484 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 }, |
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485 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 }, |
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486 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 }, |
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487 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 }, |
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488 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 }, |
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489 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 }, |
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490 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 }, |
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491 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 }, |
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492 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 }, |
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493 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 }, |
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494 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 }, |
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495 |
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496 /* -O3 optimizations. */ |
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497 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 }, |
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498 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 }, |
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499 /* Inlining of functions reducing size is a good idea with -Os |
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500 regardless of them being declared inline. */ |
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501 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 }, |
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502 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 }, |
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503 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 }, |
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504 { OPT_LEVELS_3_PLUS, OPT_ftree_vectorize, NULL, 1 }, |
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505 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 }, |
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506 |
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507 /* -Ofast adds optimizations to -O3. */ |
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508 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 }, |
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509 |
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510 { OPT_LEVELS_NONE, 0, NULL, 0 } |
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511 }; |
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512 |
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513 /* Default the options in OPTS and OPTS_SET based on the optimization |
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514 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */ |
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515 void |
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516 default_options_optimization (struct gcc_options *opts, |
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517 struct gcc_options *opts_set, |
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518 struct cl_decoded_option *decoded_options, |
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519 unsigned int decoded_options_count, |
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520 location_t loc, |
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521 unsigned int lang_mask, |
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522 const struct cl_option_handlers *handlers, |
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523 diagnostic_context *dc) |
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524 { |
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525 unsigned int i; |
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526 int opt2; |
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527 |
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528 /* Scan to see what optimization level has been specified. That will |
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529 determine the default value of many flags. */ |
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530 for (i = 1; i < decoded_options_count; i++) |
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531 { |
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532 struct cl_decoded_option *opt = &decoded_options[i]; |
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533 switch (opt->opt_index) |
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534 { |
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535 case OPT_O: |
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536 if (*opt->arg == '\0') |
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537 { |
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538 opts->x_optimize = 1; |
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539 opts->x_optimize_size = 0; |
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540 opts->x_optimize_fast = 0; |
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541 } |
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542 else |
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543 { |
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544 const int optimize_val = integral_argument (opt->arg); |
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545 if (optimize_val == -1) |
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546 error_at (loc, |
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547 "argument to %qs should be a non-negative integer", |
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548 "-O"); |
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549 else |
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550 { |
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551 opts->x_optimize = optimize_val; |
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552 if ((unsigned int) opts->x_optimize > 255) |
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553 opts->x_optimize = 255; |
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554 opts->x_optimize_size = 0; |
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555 opts->x_optimize_fast = 0; |
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556 } |
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557 } |
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558 break; |
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559 |
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560 case OPT_Os: |
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561 opts->x_optimize_size = 1; |
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562 |
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563 /* Optimizing for size forces optimize to be 2. */ |
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564 opts->x_optimize = 2; |
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565 opts->x_optimize_fast = 0; |
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566 break; |
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567 |
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568 case OPT_Ofast: |
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569 /* -Ofast only adds flags to -O3. */ |
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570 opts->x_optimize_size = 0; |
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571 opts->x_optimize = 3; |
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572 opts->x_optimize_fast = 1; |
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573 break; |
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574 |
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575 default: |
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576 /* Ignore other options in this prescan. */ |
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577 break; |
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578 } |
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579 } |
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580 |
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581 maybe_default_options (opts, opts_set, default_options_table, |
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582 opts->x_optimize, opts->x_optimize_size, |
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583 opts->x_optimize_fast, lang_mask, handlers, loc, dc); |
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584 |
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585 /* -O2 param settings. */ |
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586 opt2 = (opts->x_optimize >= 2); |
0 | 587 |
588 /* Track fields in field-sensitive alias analysis. */ | |
67
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589 maybe_set_param_value |
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590 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE, |
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591 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE), |
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592 opts->x_param_values, opts_set->x_param_values); |
0 | 593 |
594 /* For -O1 only do loop invariant motion for very small loops. */ | |
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595 maybe_set_param_value |
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596 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP, |
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597 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000, |
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598 opts->x_param_values, opts_set->x_param_values); |
0 | 599 |
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600 if (opts->x_optimize_size) |
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601 /* We want to crossjump as much as possible. */ |
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602 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1, |
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603 opts->x_param_values, opts_set->x_param_values); |
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604 else |
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605 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, |
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606 default_param_value (PARAM_MIN_CROSSJUMP_INSNS), |
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607 opts->x_param_values, opts_set->x_param_values); |
0 | 608 |
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609 /* Allow default optimizations to be specified on a per-machine basis. */ |
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610 maybe_default_options (opts, opts_set, |
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611 targetm.target_option.optimization_table, |
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612 opts->x_optimize, opts->x_optimize_size, |
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613 opts->x_optimize_fast, lang_mask, handlers, loc, dc); |
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614 } |
0 | 615 |
67
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616 /* After all options at LOC have been read into OPTS and OPTS_SET, |
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617 finalize settings of those options and diagnose incompatible |
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618 combinations. */ |
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619 void |
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620 finish_options (struct gcc_options *opts, struct gcc_options *opts_set, |
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621 location_t loc) |
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622 { |
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623 enum unwind_info_type ui_except; |
0 | 624 |
67
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625 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name)) |
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626 { |
67
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627 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the |
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628 OPTS->X_DUMP_DIR_NAME directory. Then try to make |
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629 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME |
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630 directory, typically the directory to contain the object |
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631 file. */ |
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632 if (opts->x_dump_dir_name) |
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633 opts->x_dump_base_name = concat (opts->x_dump_dir_name, |
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634 opts->x_dump_base_name, NULL); |
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635 else if (opts->x_aux_base_name |
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636 && strcmp (opts->x_aux_base_name, HOST_BIT_BUCKET) != 0) |
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637 { |
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638 const char *aux_base; |
55
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639 |
67
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640 base_of_path (opts->x_aux_base_name, &aux_base); |
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641 if (opts->x_aux_base_name != aux_base) |
63
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642 { |
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643 int dir_len = aux_base - opts->x_aux_base_name; |
63
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644 char *new_dump_base_name = |
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645 XNEWVEC (char, strlen (opts->x_dump_base_name) + dir_len + 1); |
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646 |
67
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647 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */ |
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648 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len); |
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649 /* Append existing OPTS->X_DUMP_BASE_NAME. */ |
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650 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name); |
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651 opts->x_dump_base_name = new_dump_base_name; |
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652 } |
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653 } |
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654 } |
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655 |
0 | 656 /* Handle related options for unit-at-a-time, toplevel-reorder, and |
657 section-anchors. */ | |
67
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658 if (!opts->x_flag_unit_at_a_time) |
0 | 659 { |
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660 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors) |
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661 error_at (loc, "section anchors must be disabled when unit-at-a-time " |
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662 "is disabled"); |
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663 opts->x_flag_section_anchors = 0; |
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664 if (opts->x_flag_toplevel_reorder == 1) |
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665 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time " |
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666 "is disabled"); |
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667 opts->x_flag_toplevel_reorder = 0; |
0 | 668 } |
67
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669 |
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670 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */ |
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671 if (opts->x_warn_missing_noreturn) |
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672 opts->x_warn_suggest_attribute_noreturn = true; |
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673 |
0 | 674 /* Unless the user has asked for section anchors, we disable toplevel |
675 reordering at -O0 to disable transformations that might be surprising | |
676 to end users and to get -fno-toplevel-reorder tested. */ | |
67
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677 if (!opts->x_optimize |
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678 && opts->x_flag_toplevel_reorder == 2 |
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679 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)) |
0 | 680 { |
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681 opts->x_flag_toplevel_reorder = 0; |
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682 opts->x_flag_section_anchors = 0; |
0 | 683 } |
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684 if (!opts->x_flag_toplevel_reorder) |
0 | 685 { |
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686 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors) |
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687 error_at (loc, "section anchors must be disabled when toplevel reorder" |
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688 " is disabled"); |
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689 opts->x_flag_section_anchors = 0; |
0 | 690 } |
691 | |
67
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692 if (!opts->x_flag_opts_finished) |
0 | 693 { |
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694 if (opts->x_flag_pie) |
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695 opts->x_flag_pic = opts->x_flag_pie; |
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696 if (opts->x_flag_pic && !opts->x_flag_pie) |
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697 opts->x_flag_shlib = 1; |
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698 opts->x_flag_opts_finished = true; |
0 | 699 } |
700 | |
67
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701 if (opts->x_optimize == 0) |
0 | 702 { |
703 /* Inlining does not work if not optimizing, | |
704 so force it not to be done. */ | |
67
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705 opts->x_warn_inline = 0; |
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706 opts->x_flag_no_inline = 1; |
0 | 707 } |
708 | |
709 /* The optimization to partition hot and cold basic blocks into separate | |
710 sections of the .o and executable files does not work (currently) | |
711 with exception handling. This is because there is no support for | |
67
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712 generating unwind info. If opts->x_flag_exceptions is turned on |
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713 we need to turn off the partitioning optimization. */ |
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714 |
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715 ui_except = targetm.except_unwind_info (opts); |
0 | 716 |
67
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717 if (opts->x_flag_exceptions |
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718 && opts->x_flag_reorder_blocks_and_partition |
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719 && (ui_except == UI_SJLJ || ui_except == UI_TARGET)) |
0 | 720 { |
67
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721 inform (loc, |
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722 "-freorder-blocks-and-partition does not work " |
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723 "with exceptions on this architecture"); |
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724 opts->x_flag_reorder_blocks_and_partition = 0; |
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725 opts->x_flag_reorder_blocks = 1; |
0 | 726 } |
727 | |
728 /* If user requested unwind info, then turn off the partitioning | |
729 optimization. */ | |
730 | |
67
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731 if (opts->x_flag_unwind_tables |
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732 && !targetm.unwind_tables_default |
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733 && opts->x_flag_reorder_blocks_and_partition |
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734 && (ui_except == UI_SJLJ || ui_except == UI_TARGET)) |
0 | 735 { |
67
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736 inform (loc, |
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737 "-freorder-blocks-and-partition does not support " |
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738 "unwind info on this architecture"); |
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739 opts->x_flag_reorder_blocks_and_partition = 0; |
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740 opts->x_flag_reorder_blocks = 1; |
0 | 741 } |
742 | |
743 /* If the target requested unwind info, then turn off the partitioning | |
744 optimization with a different message. Likewise, if the target does not | |
745 support named sections. */ | |
746 | |
67
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747 if (opts->x_flag_reorder_blocks_and_partition |
0 | 748 && (!targetm.have_named_sections |
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749 || (opts->x_flag_unwind_tables |
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750 && targetm.unwind_tables_default |
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751 && (ui_except == UI_SJLJ || ui_except == UI_TARGET)))) |
0 | 752 { |
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753 inform (loc, |
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754 "-freorder-blocks-and-partition does not work " |
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755 "on this architecture"); |
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756 opts->x_flag_reorder_blocks_and_partition = 0; |
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757 opts->x_flag_reorder_blocks = 1; |
0 | 758 } |
759 | |
67
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760 if (opts->x_flag_reorder_blocks_and_partition |
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761 && !opts_set->x_flag_reorder_functions) |
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762 opts->x_flag_reorder_functions = 1; |
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763 |
0 | 764 /* Pipelining of outer loops is only possible when general pipelining |
765 capabilities are requested. */ | |
67
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766 if (!opts->x_flag_sel_sched_pipelining) |
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767 opts->x_flag_sel_sched_pipelining_outer_loops = 0; |
0 | 768 |
769 if (!targetm.ira_cover_classes | |
67
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770 && opts->x_flag_ira_algorithm == IRA_ALGORITHM_CB) |
0 | 771 { |
67
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772 inform (loc, |
0 | 773 "-fira-algorithm=CB does not work on this architecture"); |
67
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774 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY; |
0 | 775 } |
776 | |
67
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777 if (opts->x_flag_conserve_stack) |
0 | 778 { |
67
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779 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100, |
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780 opts->x_param_values, opts_set->x_param_values); |
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781 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40, |
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782 opts->x_param_values, opts_set->x_param_values); |
0 | 783 } |
67
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784 if (opts->x_flag_wpa || opts->x_flag_ltrans) |
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785 { |
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786 /* These passes are not WHOPR compatible yet. */ |
67
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787 opts->x_flag_ipa_pta = 0; |
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788 opts->x_flag_ipa_struct_reorg = 0; |
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789 } |
0 | 790 |
67
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791 if (opts->x_flag_lto) |
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792 { |
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793 #ifdef ENABLE_LTO |
67
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794 opts->x_flag_generate_lto = 1; |
55
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795 |
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796 /* When generating IL, do not operate in whole-program mode. |
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797 Otherwise, symbols will be privatized too early, causing link |
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798 errors later. */ |
67
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799 opts->x_flag_whole_program = 0; |
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800 #else |
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801 error_at (loc, "LTO support has not been enabled in this configuration"); |
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802 #endif |
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803 } |
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804 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0) |
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805 + (opts->x_flag_lto_partition_none != 0) >= 1) |
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806 { |
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807 if ((opts->x_flag_lto_partition_balanced != 0) |
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808 + (opts->x_flag_lto_partition_1to1 != 0) |
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809 + (opts->x_flag_lto_partition_none != 0) > 1) |
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810 error_at (loc, "only one -flto-partition value can be specified"); |
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811 } |
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812 |
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813 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a |
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814 default value if they choose based on other options. */ |
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815 if (opts->x_flag_split_stack == -1) |
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816 opts->x_flag_split_stack = 0; |
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817 else if (opts->x_flag_split_stack) |
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818 { |
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819 if (!targetm.supports_split_stack (true, opts)) |
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820 { |
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821 error_at (loc, "%<-fsplit-stack%> is not supported by " |
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822 "this compiler configuration"); |
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823 opts->x_flag_split_stack = 0; |
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824 } |
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825 } |
0 | 826 } |
827 | |
828 #define LEFT_COLUMN 27 | |
829 | |
830 /* Output ITEM, of length ITEM_WIDTH, in the left column, | |
831 followed by word-wrapped HELP in a second column. */ | |
832 static void | |
833 wrap_help (const char *help, | |
834 const char *item, | |
835 unsigned int item_width, | |
836 unsigned int columns) | |
837 { | |
838 unsigned int col_width = LEFT_COLUMN; | |
839 unsigned int remaining, room, len; | |
840 | |
841 remaining = strlen (help); | |
842 | |
843 do | |
844 { | |
845 room = columns - 3 - MAX (col_width, item_width); | |
846 if (room > columns) | |
847 room = 0; | |
848 len = remaining; | |
849 | |
850 if (room < len) | |
851 { | |
852 unsigned int i; | |
853 | |
854 for (i = 0; help[i]; i++) | |
855 { | |
856 if (i >= room && len != remaining) | |
857 break; | |
858 if (help[i] == ' ') | |
859 len = i; | |
860 else if ((help[i] == '-' || help[i] == '/') | |
861 && help[i + 1] != ' ' | |
862 && i > 0 && ISALPHA (help[i - 1])) | |
863 len = i + 1; | |
864 } | |
865 } | |
866 | |
867 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help); | |
868 item_width = 0; | |
869 while (help[len] == ' ') | |
870 len++; | |
871 help += len; | |
872 remaining -= len; | |
873 } | |
874 while (remaining); | |
875 } | |
876 | |
877 /* Print help for a specific front-end, etc. */ | |
878 static void | |
879 print_filtered_help (unsigned int include_flags, | |
880 unsigned int exclude_flags, | |
881 unsigned int any_flags, | |
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882 unsigned int columns, |
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883 struct gcc_options *opts, |
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884 unsigned int lang_mask) |
0 | 885 { |
886 unsigned int i; | |
887 const char *help; | |
888 bool found = false; | |
889 bool displayed = false; | |
890 | |
891 if (include_flags == CL_PARAMS) | |
892 { | |
893 for (i = 0; i < LAST_PARAM; i++) | |
894 { | |
895 const char *param = compiler_params[i].option; | |
896 | |
897 help = compiler_params[i].help; | |
898 if (help == NULL || *help == '\0') | |
899 { | |
900 if (exclude_flags & CL_UNDOCUMENTED) | |
901 continue; | |
902 help = undocumented_msg; | |
903 } | |
904 | |
905 /* Get the translation. */ | |
906 help = _(help); | |
907 | |
908 wrap_help (help, param, strlen (param), columns); | |
909 } | |
910 putchar ('\n'); | |
911 return; | |
912 } | |
913 | |
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914 if (!opts->x_help_printed) |
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915 opts->x_help_printed = XCNEWVAR (char, cl_options_count); |
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916 |
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917 if (!opts->x_help_enum_printed) |
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918 opts->x_help_enum_printed = XCNEWVAR (char, cl_enums_count); |
0 | 919 |
920 for (i = 0; i < cl_options_count; i++) | |
921 { | |
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922 char new_help[128]; |
0 | 923 const struct cl_option *option = cl_options + i; |
924 unsigned int len; | |
925 const char *opt; | |
926 const char *tab; | |
927 | |
928 if (include_flags == 0 | |
929 || ((option->flags & include_flags) != include_flags)) | |
930 { | |
931 if ((option->flags & any_flags) == 0) | |
932 continue; | |
933 } | |
934 | |
935 /* Skip unwanted switches. */ | |
936 if ((option->flags & exclude_flags) != 0) | |
937 continue; | |
938 | |
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939 /* The driver currently prints its own help text. */ |
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940 if ((option->flags & CL_DRIVER) != 0 |
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941 && (option->flags & (((1U << cl_lang_count) - 1) |
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942 | CL_COMMON | CL_TARGET)) == 0) |
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943 continue; |
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944 |
0 | 945 found = true; |
946 /* Skip switches that have already been printed. */ | |
67
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947 if (opts->x_help_printed[i]) |
0 | 948 continue; |
949 | |
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950 opts->x_help_printed[i] = true; |
0 | 951 |
952 help = option->help; | |
953 if (help == NULL) | |
954 { | |
955 if (exclude_flags & CL_UNDOCUMENTED) | |
956 continue; | |
957 help = undocumented_msg; | |
958 } | |
959 | |
960 /* Get the translation. */ | |
961 help = _(help); | |
962 | |
963 /* Find the gap between the name of the | |
964 option and its descriptive text. */ | |
965 tab = strchr (help, '\t'); | |
966 if (tab) | |
967 { | |
968 len = tab - help; | |
969 opt = help; | |
970 help = tab + 1; | |
971 } | |
972 else | |
973 { | |
974 opt = option->opt_text; | |
975 len = strlen (opt); | |
976 } | |
977 | |
978 /* With the -Q option enabled we change the descriptive text associated | |
979 with an option to be an indication of its current setting. */ | |
980 if (!quiet_flag) | |
981 { | |
67
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982 void *flag_var = option_flag_var (i, opts); |
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983 |
0 | 984 if (len < (LEFT_COLUMN + 2)) |
985 strcpy (new_help, "\t\t"); | |
986 else | |
987 strcpy (new_help, "\t"); | |
988 | |
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989 if (flag_var != NULL |
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990 && option->var_type != CLVC_DEFER) |
0 | 991 { |
992 if (option->flags & CL_JOINED) | |
993 { | |
994 if (option->var_type == CLVC_STRING) | |
995 { | |
67
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996 if (* (const char **) flag_var != NULL) |
0 | 997 snprintf (new_help + strlen (new_help), |
998 sizeof (new_help) - strlen (new_help), | |
67
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999 * (const char **) flag_var); |
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1000 } |
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1001 else if (option->var_type == CLVC_ENUM) |
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1002 { |
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1003 const struct cl_enum *e = &cl_enums[option->var_enum]; |
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1004 int value; |
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1005 const char *arg = NULL; |
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1006 |
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1007 value = e->get (flag_var); |
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1008 enum_value_to_arg (e->values, &arg, value, lang_mask); |
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1009 if (arg == NULL) |
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1010 arg = _("[default]"); |
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1011 snprintf (new_help + strlen (new_help), |
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1012 sizeof (new_help) - strlen (new_help), |
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1013 arg); |
0 | 1014 } |
1015 else | |
1016 sprintf (new_help + strlen (new_help), | |
67
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1017 "%#x", * (int *) flag_var); |
0 | 1018 } |
1019 else | |
67
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1020 strcat (new_help, option_enabled (i, opts) |
0 | 1021 ? _("[enabled]") : _("[disabled]")); |
1022 } | |
1023 | |
1024 help = new_help; | |
1025 } | |
1026 | |
1027 wrap_help (help, opt, len, columns); | |
1028 displayed = true; | |
67
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1029 |
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1030 if (option->var_type == CLVC_ENUM |
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1031 && opts->x_help_enum_printed[option->var_enum] != 2) |
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1032 opts->x_help_enum_printed[option->var_enum] = 1; |
0 | 1033 } |
1034 | |
1035 if (! found) | |
1036 { | |
1037 unsigned int langs = include_flags & CL_LANG_ALL; | |
1038 | |
1039 if (langs == 0) | |
1040 printf (_(" No options with the desired characteristics were found\n")); | |
1041 else | |
1042 { | |
1043 unsigned int i; | |
1044 | |
1045 /* PR 31349: Tell the user how to see all of the | |
1046 options supported by a specific front end. */ | |
1047 for (i = 0; (1U << i) < CL_LANG_ALL; i ++) | |
1048 if ((1U << i) & langs) | |
1049 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"), | |
1050 lang_names[i], lang_names[i]); | |
1051 } | |
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1052 |
0 | 1053 } |
1054 else if (! displayed) | |
1055 printf (_(" All options with the desired characteristics have already been displayed\n")); | |
1056 | |
1057 putchar ('\n'); | |
67
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1058 |
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1059 /* Print details of enumerated option arguments, if those |
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1060 enumerations have help text headings provided. If no help text |
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1061 is provided, presume that the possible values are listed in the |
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1062 help text for the relevant options. */ |
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1063 for (i = 0; i < cl_enums_count; i++) |
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1064 { |
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1065 unsigned int j, pos; |
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1066 |
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1067 if (opts->x_help_enum_printed[i] != 1) |
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1068 continue; |
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1069 if (cl_enums[i].help == NULL) |
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1070 continue; |
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1071 printf (" %s\n ", _(cl_enums[i].help)); |
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1072 pos = 4; |
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1073 for (j = 0; cl_enums[i].values[j].arg != NULL; j++) |
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1074 { |
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1075 unsigned int len = strlen (cl_enums[i].values[j].arg); |
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1076 |
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1077 if (pos > 4 && pos + 1 + len <= columns) |
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1078 { |
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1079 printf (" %s", cl_enums[i].values[j].arg); |
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1080 pos += 1 + len; |
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1081 } |
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1082 else |
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1083 { |
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1084 if (pos > 4) |
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1085 { |
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1086 printf ("\n "); |
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1087 pos = 4; |
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1088 } |
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1089 printf ("%s", cl_enums[i].values[j].arg); |
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1090 pos += len; |
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1091 } |
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1092 } |
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1093 printf ("\n\n"); |
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1094 opts->x_help_enum_printed[i] = 2; |
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1095 } |
0 | 1096 } |
1097 | |
1098 /* Display help for a specified type of option. | |
1099 The options must have ALL of the INCLUDE_FLAGS set | |
1100 ANY of the flags in the ANY_FLAGS set | |
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1101 and NONE of the EXCLUDE_FLAGS set. The current option state is in |
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1102 OPTS; LANG_MASK is used for interpreting enumerated option state. */ |
0 | 1103 static void |
1104 print_specific_help (unsigned int include_flags, | |
1105 unsigned int exclude_flags, | |
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1106 unsigned int any_flags, |
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1107 struct gcc_options *opts, |
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1108 unsigned int lang_mask) |
0 | 1109 { |
1110 unsigned int all_langs_mask = (1U << cl_lang_count) - 1; | |
1111 const char * description = NULL; | |
1112 const char * descrip_extra = ""; | |
1113 size_t i; | |
1114 unsigned int flag; | |
1115 | |
1116 /* Sanity check: Make sure that we do not have more | |
1117 languages than we have bits available to enumerate them. */ | |
1118 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS); | |
1119 | |
1120 /* If we have not done so already, obtain | |
1121 the desired maximum width of the output. */ | |
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1122 if (opts->x_help_columns == 0) |
0 | 1123 { |
1124 const char *p; | |
1125 | |
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1126 p = getenv ("COLUMNS"); |
0 | 1127 if (p != NULL) |
1128 { | |
1129 int value = atoi (p); | |
1130 | |
1131 if (value > 0) | |
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1132 opts->x_help_columns = value; |
0 | 1133 } |
1134 | |
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1135 if (opts->x_help_columns == 0) |
0 | 1136 /* Use a reasonable default. */ |
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1137 opts->x_help_columns = 80; |
0 | 1138 } |
1139 | |
1140 /* Decide upon the title for the options that we are going to display. */ | |
1141 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++) | |
1142 { | |
1143 switch (flag & include_flags) | |
1144 { | |
1145 case 0: | |
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1146 case CL_DRIVER: |
0 | 1147 break; |
1148 | |
1149 case CL_TARGET: | |
1150 description = _("The following options are target specific"); | |
1151 break; | |
1152 case CL_WARNING: | |
1153 description = _("The following options control compiler warning messages"); | |
1154 break; | |
1155 case CL_OPTIMIZATION: | |
1156 description = _("The following options control optimizations"); | |
1157 break; | |
1158 case CL_COMMON: | |
1159 description = _("The following options are language-independent"); | |
1160 break; | |
1161 case CL_PARAMS: | |
1162 description = _("The --param option recognizes the following as parameters"); | |
1163 break; | |
1164 default: | |
1165 if (i >= cl_lang_count) | |
1166 break; | |
1167 if (exclude_flags & all_langs_mask) | |
1168 description = _("The following options are specific to just the language "); | |
1169 else | |
1170 description = _("The following options are supported by the language "); | |
1171 descrip_extra = lang_names [i]; | |
1172 break; | |
1173 } | |
1174 } | |
1175 | |
1176 if (description == NULL) | |
1177 { | |
1178 if (any_flags == 0) | |
1179 { | |
1180 if (include_flags & CL_UNDOCUMENTED) | |
1181 description = _("The following options are not documented"); | |
1182 else if (include_flags & CL_SEPARATE) | |
1183 description = _("The following options take separate arguments"); | |
1184 else if (include_flags & CL_JOINED) | |
1185 description = _("The following options take joined arguments"); | |
1186 else | |
1187 { | |
1188 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help", | |
1189 include_flags); | |
1190 return; | |
1191 } | |
1192 } | |
1193 else | |
1194 { | |
1195 if (any_flags & all_langs_mask) | |
1196 description = _("The following options are language-related"); | |
1197 else | |
1198 description = _("The following options are language-independent"); | |
1199 } | |
1200 } | |
1201 | |
1202 printf ("%s%s:\n", description, descrip_extra); | |
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1203 print_filtered_help (include_flags, exclude_flags, any_flags, |
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1204 opts->x_help_columns, opts, lang_mask); |
0 | 1205 } |
1206 | |
1207 /* Handle target- and language-independent options. Return zero to | |
1208 generate an "unknown option" message. Only options that need | |
1209 extra handling need to be listed here; if you simply want | |
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1210 DECODED->value assigned to a variable, it happens automatically. */ |
0 | 1211 |
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1212 bool |
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1213 common_handle_option (struct gcc_options *opts, |
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1214 struct gcc_options *opts_set, |
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1215 const struct cl_decoded_option *decoded, |
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1216 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED, |
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1217 location_t loc, |
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1218 const struct cl_option_handlers *handlers, |
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1219 diagnostic_context *dc) |
0 | 1220 { |
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1221 size_t scode = decoded->opt_index; |
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1222 const char *arg = decoded->arg; |
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1223 int value = decoded->value; |
0 | 1224 enum opt_code code = (enum opt_code) scode; |
1225 | |
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1226 gcc_assert (decoded->canonical_option_num_elements <= 2); |
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1227 |
0 | 1228 switch (code) |
1229 { | |
1230 case OPT__param: | |
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1231 handle_param (opts, opts_set, loc, arg); |
0 | 1232 break; |
1233 | |
1234 case OPT__help: | |
1235 { | |
1236 unsigned int all_langs_mask = (1U << cl_lang_count) - 1; | |
1237 unsigned int undoc_mask; | |
1238 unsigned int i; | |
1239 | |
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1240 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings) |
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1241 ? 0 |
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1242 : CL_UNDOCUMENTED); |
0 | 1243 /* First display any single language specific options. */ |
1244 for (i = 0; i < cl_lang_count; i++) | |
1245 print_specific_help | |
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1246 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts, |
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1247 lang_mask); |
0 | 1248 /* Next display any multi language specific options. */ |
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1249 print_specific_help (0, undoc_mask, all_langs_mask, opts, lang_mask); |
0 | 1250 /* Then display any remaining, non-language options. */ |
1251 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1) | |
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1252 if (i != CL_DRIVER) |
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1253 print_specific_help (i, undoc_mask, 0, opts, lang_mask); |
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1254 opts->x_exit_after_options = true; |
0 | 1255 break; |
1256 } | |
1257 | |
1258 case OPT__target_help: | |
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1259 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts, lang_mask); |
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1260 opts->x_exit_after_options = true; |
0 | 1261 |
1262 /* Allow the target a chance to give the user some additional information. */ | |
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1263 if (targetm.help) |
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1264 targetm.help (); |
0 | 1265 break; |
1266 | |
1267 case OPT__help_: | |
1268 { | |
1269 const char * a = arg; | |
1270 unsigned int include_flags = 0; | |
1271 /* Note - by default we include undocumented options when listing | |
1272 specific classes. If you only want to see documented options | |
1273 then add ",^undocumented" to the --help= option. E.g.: | |
1274 | |
1275 --help=target,^undocumented */ | |
1276 unsigned int exclude_flags = 0; | |
1277 | |
1278 /* Walk along the argument string, parsing each word in turn. | |
1279 The format is: | |
1280 arg = [^]{word}[,{arg}] | |
1281 word = {optimizers|target|warnings|undocumented| | |
1282 params|common|<language>} */ | |
1283 while (* a != 0) | |
1284 { | |
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1285 static const struct |
0 | 1286 { |
1287 const char * string; | |
1288 unsigned int flag; | |
1289 } | |
1290 specifics[] = | |
1291 { | |
1292 { "optimizers", CL_OPTIMIZATION }, | |
1293 { "target", CL_TARGET }, | |
1294 { "warnings", CL_WARNING }, | |
1295 { "undocumented", CL_UNDOCUMENTED }, | |
1296 { "params", CL_PARAMS }, | |
1297 { "joined", CL_JOINED }, | |
1298 { "separate", CL_SEPARATE }, | |
1299 { "common", CL_COMMON }, | |
1300 { NULL, 0 } | |
1301 }; | |
1302 unsigned int * pflags; | |
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1303 const char * comma; |
0 | 1304 unsigned int lang_flag, specific_flag; |
1305 unsigned int len; | |
1306 unsigned int i; | |
1307 | |
1308 if (* a == '^') | |
1309 { | |
1310 ++ a; | |
1311 pflags = & exclude_flags; | |
1312 } | |
1313 else | |
1314 pflags = & include_flags; | |
1315 | |
1316 comma = strchr (a, ','); | |
1317 if (comma == NULL) | |
1318 len = strlen (a); | |
1319 else | |
1320 len = comma - a; | |
1321 if (len == 0) | |
1322 { | |
1323 a = comma + 1; | |
1324 continue; | |
1325 } | |
1326 | |
1327 /* Check to see if the string matches an option class name. */ | |
1328 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++) | |
1329 if (strncasecmp (a, specifics[i].string, len) == 0) | |
1330 { | |
1331 specific_flag = specifics[i].flag; | |
1332 break; | |
1333 } | |
1334 | |
1335 /* Check to see if the string matches a language name. | |
1336 Note - we rely upon the alpha-sorted nature of the entries in | |
1337 the lang_names array, specifically that shorter names appear | |
1338 before their longer variants. (i.e. C before C++). That way | |
1339 when we are attempting to match --help=c for example we will | |
1340 match with C first and not C++. */ | |
1341 for (i = 0, lang_flag = 0; i < cl_lang_count; i++) | |
1342 if (strncasecmp (a, lang_names[i], len) == 0) | |
1343 { | |
1344 lang_flag = 1U << i; | |
1345 break; | |
1346 } | |
1347 | |
1348 if (specific_flag != 0) | |
1349 { | |
1350 if (lang_flag == 0) | |
1351 * pflags |= specific_flag; | |
1352 else | |
1353 { | |
1354 /* The option's argument matches both the start of a | |
1355 language name and the start of an option class name. | |
1356 We have a special case for when the user has | |
1357 specified "--help=c", but otherwise we have to issue | |
1358 a warning. */ | |
1359 if (strncasecmp (a, "c", len) == 0) | |
1360 * pflags |= lang_flag; | |
1361 else | |
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1362 warning_at (loc, 0, |
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1363 "--help argument %q.*s is ambiguous, " |
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1364 "please be more specific", |
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1365 len, a); |
0 | 1366 } |
1367 } | |
1368 else if (lang_flag != 0) | |
1369 * pflags |= lang_flag; | |
1370 else | |
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1371 warning_at (loc, 0, |
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1372 "unrecognized argument to --help= option: %q.*s", |
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1373 len, a); |
0 | 1374 |
1375 if (comma == NULL) | |
1376 break; | |
1377 a = comma + 1; | |
1378 } | |
1379 | |
1380 if (include_flags) | |
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1381 print_specific_help (include_flags, exclude_flags, 0, opts, |
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1382 lang_mask); |
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1383 opts->x_exit_after_options = true; |
0 | 1384 break; |
1385 } | |
1386 | |
1387 case OPT__version: | |
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1388 opts->x_exit_after_options = true; |
0 | 1389 break; |
1390 | |
1391 case OPT_O: | |
1392 case OPT_Os: | |
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1393 case OPT_Ofast: |
0 | 1394 /* Currently handled in a prescan. */ |
1395 break; | |
1396 | |
1397 case OPT_Werror_: | |
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1398 enable_warning_as_error (arg, value, lang_mask, handlers, |
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1399 opts, opts_set, loc, dc); |
0 | 1400 break; |
1401 | |
1402 case OPT_Wlarger_than_: | |
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1403 opts->x_larger_than_size = value; |
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1404 opts->x_warn_larger_than = value != -1; |
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1405 break; |
0 | 1406 |
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1407 case OPT_Wfatal_errors: |
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1408 dc->fatal_errors = value; |
0 | 1409 break; |
1410 | |
1411 case OPT_Wframe_larger_than_: | |
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1412 opts->x_frame_larger_than_size = value; |
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1413 opts->x_warn_frame_larger_than = value != -1; |
0 | 1414 break; |
1415 | |
1416 case OPT_Wstrict_aliasing: | |
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1417 set_Wstrict_aliasing (opts, value); |
0 | 1418 break; |
1419 | |
1420 case OPT_Wstrict_overflow: | |
67
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1421 opts->x_warn_strict_overflow = (value |
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1422 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL |
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1423 : 0); |
0 | 1424 break; |
1425 | |
67
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1426 case OPT_Wsystem_headers: |
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1427 dc->dc_warn_system_headers = value; |
0 | 1428 break; |
1429 | |
1430 case OPT_aux_info: | |
67
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1431 opts->x_flag_gen_aux_info = 1; |
0 | 1432 break; |
1433 | |
1434 case OPT_auxbase_strip: | |
1435 { | |
1436 char *tmp = xstrdup (arg); | |
1437 strip_off_ending (tmp, strlen (tmp)); | |
1438 if (tmp[0]) | |
67
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1439 opts->x_aux_base_name = tmp; |
0 | 1440 } |
1441 break; | |
1442 | |
1443 case OPT_d: | |
67
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|
1444 decode_d_option (arg, opts, loc, dc); |
0 | 1445 break; |
1446 | |
1447 case OPT_fcall_used_: | |
1448 case OPT_fcall_saved_: | |
67
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|
1449 /* Deferred. */ |
0 | 1450 break; |
1451 | |
1452 case OPT_fdbg_cnt_: | |
1453 case OPT_fdbg_cnt_list: | |
67
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1454 /* Deferred. */ |
0 | 1455 break; |
1456 | |
1457 case OPT_fdebug_prefix_map_: | |
67
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|
1458 /* Deferred. */ |
0 | 1459 break; |
1460 | |
1461 case OPT_fdiagnostics_show_location_: | |
67
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1462 diagnostic_prefixing_rule (dc) = (diagnostic_prefixing_rule_t) value; |
0 | 1463 break; |
1464 | |
1465 case OPT_fdiagnostics_show_option: | |
67
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1466 dc->show_option_requested = value; |
0 | 1467 break; |
1468 | |
1469 case OPT_fdump_: | |
67
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1470 /* Deferred. */ |
55
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1471 break; |
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1472 |
0 | 1473 case OPT_ffast_math: |
67
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1474 set_fast_math_flags (opts, value); |
0 | 1475 break; |
1476 | |
1477 case OPT_funsafe_math_optimizations: | |
67
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1478 set_unsafe_math_optimizations_flags (opts, value); |
0 | 1479 break; |
1480 | |
1481 case OPT_ffixed_: | |
67
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1482 /* Deferred. */ |
0 | 1483 break; |
1484 | |
1485 case OPT_finline_limit_: | |
67
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1486 set_param_value ("max-inline-insns-single", value / 2, |
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1487 opts->x_param_values, opts_set->x_param_values); |
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1488 set_param_value ("max-inline-insns-auto", value / 2, |
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1489 opts->x_param_values, opts_set->x_param_values); |
0 | 1490 break; |
1491 | |
1492 case OPT_finstrument_functions_exclude_function_list_: | |
1493 add_comma_separated_to_vector | |
67
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|
1494 (&opts->x_flag_instrument_functions_exclude_functions, arg); |
0 | 1495 break; |
1496 | |
1497 case OPT_finstrument_functions_exclude_file_list_: | |
1498 add_comma_separated_to_vector | |
67
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|
1499 (&opts->x_flag_instrument_functions_exclude_files, arg); |
0 | 1500 break; |
1501 | |
1502 case OPT_fmessage_length_: | |
67
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|
1503 pp_set_line_maximum_length (dc->printer, value); |
0 | 1504 break; |
1505 | |
1506 case OPT_fpack_struct_: | |
1507 if (value <= 0 || (value & (value - 1)) || value > 16) | |
67
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|
1508 error_at (loc, |
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1509 "structure alignment must be a small power of two, not %d", |
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1510 value); |
0 | 1511 else |
67
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|
1512 opts->x_initial_max_fld_align = value; |
0 | 1513 break; |
1514 | |
55
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1515 case OPT_fplugin_: |
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1516 case OPT_fplugin_arg_: |
67
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|
1517 /* Deferred. */ |
0 | 1518 break; |
1519 | |
1520 case OPT_fprofile_use_: | |
67
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1521 opts->x_profile_data_prefix = xstrdup (arg); |
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1522 opts->x_flag_profile_use = true; |
0 | 1523 value = true; |
1524 /* No break here - do -fprofile-use processing. */ | |
1525 case OPT_fprofile_use: | |
67
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1526 if (!opts_set->x_flag_branch_probabilities) |
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1527 opts->x_flag_branch_probabilities = value; |
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1528 if (!opts_set->x_flag_profile_values) |
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1529 opts->x_flag_profile_values = value; |
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1530 if (!opts_set->x_flag_unroll_loops) |
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1531 opts->x_flag_unroll_loops = value; |
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1532 if (!opts_set->x_flag_peel_loops) |
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1533 opts->x_flag_peel_loops = value; |
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1534 if (!opts_set->x_flag_tracer) |
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1535 opts->x_flag_tracer = value; |
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1536 if (!opts_set->x_flag_value_profile_transformations) |
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1537 opts->x_flag_value_profile_transformations = value; |
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1538 if (!opts_set->x_flag_inline_functions) |
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|
1539 opts->x_flag_inline_functions = value; |
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1540 if (!opts_set->x_flag_ipa_cp) |
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|
1541 opts->x_flag_ipa_cp = value; |
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1542 if (!opts_set->x_flag_ipa_cp_clone |
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1543 && value && opts->x_flag_ipa_cp) |
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|
1544 opts->x_flag_ipa_cp_clone = value; |
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1545 if (!opts_set->x_flag_predictive_commoning) |
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1546 opts->x_flag_predictive_commoning = value; |
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1547 if (!opts_set->x_flag_unswitch_loops) |
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|
1548 opts->x_flag_unswitch_loops = value; |
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1549 if (!opts_set->x_flag_gcse_after_reload) |
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|
1550 opts->x_flag_gcse_after_reload = value; |
0 | 1551 break; |
1552 | |
1553 case OPT_fprofile_generate_: | |
67
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|
1554 opts->x_profile_data_prefix = xstrdup (arg); |
0 | 1555 value = true; |
1556 /* No break here - do -fprofile-generate processing. */ | |
1557 case OPT_fprofile_generate: | |
67
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|
1558 if (!opts_set->x_profile_arc_flag) |
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|
1559 opts->x_profile_arc_flag = value; |
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1560 if (!opts_set->x_flag_profile_values) |
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|
1561 opts->x_flag_profile_values = value; |
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|
1562 if (!opts_set->x_flag_value_profile_transformations) |
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|
1563 opts->x_flag_value_profile_transformations = value; |
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1564 if (!opts_set->x_flag_inline_functions) |
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|
1565 opts->x_flag_inline_functions = value; |
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|
1566 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps |
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|
1567 quadratic. Disable the pass until better memory representation |
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|
1568 is done. */ |
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|
1569 if (!opts_set->x_flag_ipa_reference && in_lto_p) |
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|
1570 opts->x_flag_ipa_reference = false; |
0 | 1571 break; |
1572 | |
67
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|
1573 case OPT_fshow_column: |
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|
1574 dc->show_column = value; |
0 | 1575 break; |
1576 | |
1577 case OPT_frandom_seed: | |
1578 /* The real switch is -fno-random-seed. */ | |
1579 if (value) | |
67
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|
1580 return false; |
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changeset
|
1581 /* Deferred. */ |
0 | 1582 break; |
1583 | |
1584 case OPT_frandom_seed_: | |
67
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|
1585 /* Deferred. */ |
0 | 1586 break; |
1587 | |
1588 case OPT_fsched_verbose_: | |
1589 #ifdef INSN_SCHEDULING | |
67
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|
1590 /* Handled with Var in common.opt. */ |
0 | 1591 break; |
1592 #else | |
67
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|
1593 return false; |
0 | 1594 #endif |
1595 | |
1596 case OPT_fsched_stalled_insns_: | |
67
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|
1597 opts->x_flag_sched_stalled_insns = value; |
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1598 if (opts->x_flag_sched_stalled_insns == 0) |
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|
1599 opts->x_flag_sched_stalled_insns = -1; |
0 | 1600 break; |
1601 | |
1602 case OPT_fsched_stalled_insns_dep_: | |
67
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|
1603 opts->x_flag_sched_stalled_insns_dep = value; |
0 | 1604 break; |
1605 | |
1606 case OPT_fstack_check_: | |
1607 if (!strcmp (arg, "no")) | |
67
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|
1608 opts->x_flag_stack_check = NO_STACK_CHECK; |
0 | 1609 else if (!strcmp (arg, "generic")) |
1610 /* This is the old stack checking method. */ | |
67
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1611 opts->x_flag_stack_check = STACK_CHECK_BUILTIN |
0 | 1612 ? FULL_BUILTIN_STACK_CHECK |
1613 : GENERIC_STACK_CHECK; | |
1614 else if (!strcmp (arg, "specific")) | |
1615 /* This is the new stack checking method. */ | |
67
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|
1616 opts->x_flag_stack_check = STACK_CHECK_BUILTIN |
0 | 1617 ? FULL_BUILTIN_STACK_CHECK |
1618 : STACK_CHECK_STATIC_BUILTIN | |
1619 ? STATIC_BUILTIN_STACK_CHECK | |
1620 : GENERIC_STACK_CHECK; | |
1621 else | |
67
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|
1622 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg); |
0 | 1623 break; |
1624 | |
1625 case OPT_fstack_limit: | |
1626 /* The real switch is -fno-stack-limit. */ | |
1627 if (value) | |
67
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|
1628 return false; |
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|
1629 /* Deferred. */ |
0 | 1630 break; |
1631 | |
1632 case OPT_fstack_limit_register_: | |
1633 case OPT_fstack_limit_symbol_: | |
67
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|
1634 /* Deferred. */ |
0 | 1635 break; |
1636 | |
1637 case OPT_ftree_vectorizer_verbose_: | |
67
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|
1638 vect_set_verbosity_level (opts, value); |
0 | 1639 break; |
1640 | |
1641 case OPT_g: | |
67
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1642 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set, |
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1643 loc); |
0 | 1644 break; |
1645 | |
1646 case OPT_gcoff: | |
67
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|
1647 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc); |
0 | 1648 break; |
1649 | |
55
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1650 case OPT_gdwarf_: |
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1651 if (value < 2 || value > 4) |
67
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|
1652 error_at (loc, "dwarf version %d is not supported", value); |
55
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1653 else |
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1654 dwarf_version = value; |
67
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|
1655 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc); |
0 | 1656 break; |
1657 | |
1658 case OPT_ggdb: | |
67
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|
1659 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc); |
0 | 1660 break; |
1661 | |
1662 case OPT_gstabs: | |
1663 case OPT_gstabs_: | |
67
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|
1664 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set, |
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|
1665 loc); |
0 | 1666 break; |
1667 | |
1668 case OPT_gvms: | |
67
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|
1669 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc); |
0 | 1670 break; |
1671 | |
1672 case OPT_gxcoff: | |
1673 case OPT_gxcoff_: | |
67
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|
1674 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set, |
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|
1675 loc); |
0 | 1676 break; |
1677 | |
1678 case OPT_pedantic_errors: | |
67
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|
1679 opts->x_pedantic = 1; |
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|
1680 dc->pedantic_errors = 1; |
63
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|
1681 break; |
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1682 |
67
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|
1683 case OPT_flto: |
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|
1684 opts->x_flag_lto = value ? "" : NULL; |
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|
1685 break; |
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1686 |
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|
1687 case OPT_w: |
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|
1688 dc->dc_inhibit_warnings = true; |
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|
1689 break; |
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|
1690 |
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|
1691 case OPT_fmax_errors_: |
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|
1692 dc->max_errors = value; |
0 | 1693 break; |
1694 | |
55
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diff
changeset
|
1695 case OPT_fuse_linker_plugin: |
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diff
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|
1696 /* No-op. Used by the driver and passed to us because it starts with f.*/ |
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diff
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|
1697 break; |
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diff
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|
1698 |
0 | 1699 default: |
1700 /* If the flag was handled in a standard way, assume the lack of | |
1701 processing here is intentional. */ | |
67
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|
1702 gcc_assert (option_flag_var (scode, opts)); |
0 | 1703 break; |
1704 } | |
1705 | |
67
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|
1706 return true; |
0 | 1707 } |
1708 | |
1709 /* Handle --param NAME=VALUE. */ | |
1710 static void | |
67
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|
1711 handle_param (struct gcc_options *opts, struct gcc_options *opts_set, |
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|
1712 location_t loc, const char *carg) |
0 | 1713 { |
1714 char *equal, *arg; | |
1715 int value; | |
1716 | |
1717 arg = xstrdup (carg); | |
1718 equal = strchr (arg, '='); | |
1719 if (!equal) | |
67
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diff
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|
1720 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE", |
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|
1721 arg); |
0 | 1722 else |
1723 { | |
1724 value = integral_argument (equal + 1); | |
1725 if (value == -1) | |
67
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|
1726 error_at (loc, "invalid --param value %qs", equal + 1); |
0 | 1727 else |
1728 { | |
1729 *equal = '\0'; | |
67
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|
1730 set_param_value (arg, value, |
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|
1731 opts->x_param_values, opts_set->x_param_values); |
0 | 1732 } |
1733 } | |
1734 | |
1735 free (arg); | |
1736 } | |
1737 | |
67
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|
1738 /* Used to set the level of strict aliasing warnings in OPTS, |
0 | 1739 when no level is specified (i.e., when -Wstrict-aliasing, and not |
1740 -Wstrict-aliasing=level was given). | |
1741 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified, | |
1742 and 0 otherwise. After calling this function, wstrict_aliasing will be | |
1743 set to the default value of -Wstrict_aliasing=level, currently 3. */ | |
1744 void | |
67
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|
1745 set_Wstrict_aliasing (struct gcc_options *opts, int onoff) |
0 | 1746 { |
1747 gcc_assert (onoff == 0 || onoff == 1); | |
1748 if (onoff != 0) | |
67
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|
1749 opts->x_warn_strict_aliasing = 3; |
0 | 1750 else |
67
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|
1751 opts->x_warn_strict_aliasing = 0; |
0 | 1752 } |
1753 | |
1754 /* The following routines are useful in setting all the flags that | |
1755 -ffast-math and -fno-fast-math imply. */ | |
67
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|
1756 static void |
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|
1757 set_fast_math_flags (struct gcc_options *opts, int set) |
0 | 1758 { |
67
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|
1759 if (!opts->frontend_set_flag_unsafe_math_optimizations) |
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|
1760 { |
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|
1761 opts->x_flag_unsafe_math_optimizations = set; |
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|
1762 set_unsafe_math_optimizations_flags (opts, set); |
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|
1763 } |
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|
1764 if (!opts->frontend_set_flag_finite_math_only) |
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|
1765 opts->x_flag_finite_math_only = set; |
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|
1766 if (!opts->frontend_set_flag_errno_math) |
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|
1767 opts->x_flag_errno_math = !set; |
0 | 1768 if (set) |
1769 { | |
67
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|
1770 if (!opts->frontend_set_flag_signaling_nans) |
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|
1771 opts->x_flag_signaling_nans = 0; |
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|
1772 if (!opts->frontend_set_flag_rounding_math) |
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1773 opts->x_flag_rounding_math = 0; |
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1774 if (!opts->frontend_set_flag_cx_limited_range) |
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1775 opts->x_flag_cx_limited_range = 1; |
0 | 1776 } |
1777 } | |
1778 | |
55
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1779 /* When -funsafe-math-optimizations is set the following |
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1780 flags are set as well. */ |
67
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1781 static void |
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1782 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set) |
0 | 1783 { |
67
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1784 if (!opts->frontend_set_flag_trapping_math) |
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1785 opts->x_flag_trapping_math = !set; |
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1786 if (!opts->frontend_set_flag_signed_zeros) |
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1787 opts->x_flag_signed_zeros = !set; |
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1788 if (!opts->frontend_set_flag_associative_math) |
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1789 opts->x_flag_associative_math = set; |
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1790 if (!opts->frontend_set_flag_reciprocal_math) |
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1791 opts->x_flag_reciprocal_math = set; |
0 | 1792 } |
1793 | |
67
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1794 /* Return true iff flags in OPTS are set as if -ffast-math. */ |
0 | 1795 bool |
67
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1796 fast_math_flags_set_p (const struct gcc_options *opts) |
0 | 1797 { |
67
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1798 return (!opts->x_flag_trapping_math |
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1799 && opts->x_flag_unsafe_math_optimizations |
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1800 && opts->x_flag_finite_math_only |
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1801 && !opts->x_flag_signed_zeros |
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1802 && !opts->x_flag_errno_math); |
0 | 1803 } |
1804 | |
1805 /* Return true iff flags are set as if -ffast-math but using the flags stored | |
1806 in the struct cl_optimization structure. */ | |
1807 bool | |
1808 fast_math_flags_struct_set_p (struct cl_optimization *opt) | |
1809 { | |
67
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1810 return (!opt->x_flag_trapping_math |
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1811 && opt->x_flag_unsafe_math_optimizations |
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1812 && opt->x_flag_finite_math_only |
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1813 && !opt->x_flag_signed_zeros |
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1814 && !opt->x_flag_errno_math); |
0 | 1815 } |
1816 | |
67
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1817 /* Handle a debug output -g switch for options OPTS |
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1818 (OPTS_SET->x_write_symbols storing whether a debug type was passed |
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1819 explicitly), location LOC. EXTENDED is true or false to support |
0 | 1820 extended output (2 is special and means "-ggdb" was given). */ |
1821 static void | |
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1822 set_debug_level (enum debug_info_type type, int extended, const char *arg, |
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1823 struct gcc_options *opts, struct gcc_options *opts_set, |
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1824 location_t loc) |
0 | 1825 { |
67
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1826 opts->x_use_gnu_debug_info_extensions = extended; |
0 | 1827 |
1828 if (type == NO_DEBUG) | |
1829 { | |
67
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1830 if (opts->x_write_symbols == NO_DEBUG) |
0 | 1831 { |
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1832 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE; |
0 | 1833 |
1834 if (extended == 2) | |
1835 { | |
1836 #ifdef DWARF2_DEBUGGING_INFO | |
67
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1837 opts->x_write_symbols = DWARF2_DEBUG; |
0 | 1838 #elif defined DBX_DEBUGGING_INFO |
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1839 opts->x_write_symbols = DBX_DEBUG; |
0 | 1840 #endif |
1841 } | |
1842 | |
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1843 if (opts->x_write_symbols == NO_DEBUG) |
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1844 warning_at (loc, 0, "target system does not support debug output"); |
0 | 1845 } |
1846 } | |
1847 else | |
1848 { | |
1849 /* Does it conflict with an already selected type? */ | |
67
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1850 if (opts_set->x_write_symbols != NO_DEBUG |
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1851 && opts->x_write_symbols != NO_DEBUG |
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1852 && type != opts->x_write_symbols) |
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1853 error_at (loc, "debug format \"%s\" conflicts with prior selection", |
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1854 debug_type_names[type]); |
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1855 opts->x_write_symbols = type; |
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1856 opts_set->x_write_symbols = type; |
0 | 1857 } |
1858 | |
1859 /* A debug flag without a level defaults to level 2. */ | |
1860 if (*arg == '\0') | |
1861 { | |
67
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1862 if (!opts->x_debug_info_level) |
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1863 opts->x_debug_info_level = DINFO_LEVEL_NORMAL; |
0 | 1864 } |
1865 else | |
1866 { | |
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1867 int argval = integral_argument (arg); |
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1868 if (argval == -1) |
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1869 error_at (loc, "unrecognised debug output level \"%s\"", arg); |
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1870 else if (argval > 3) |
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1871 error_at (loc, "debug output level %s is too high", arg); |
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1872 else |
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1873 opts->x_debug_info_level = (enum debug_info_levels) argval; |
0 | 1874 } |
1875 } | |
1876 | |
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1877 /* Arrange to dump core on error for diagnostic context DC. (The |
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1878 regular error message is still printed first, except in the case of |
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1879 abort ().) */ |
0 | 1880 |
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1881 static void |
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1882 setup_core_dumping (diagnostic_context *dc) |
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1883 { |
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1884 #ifdef SIGABRT |
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1885 signal (SIGABRT, SIG_DFL); |
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1886 #endif |
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1887 #if defined(HAVE_SETRLIMIT) |
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1888 { |
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1889 struct rlimit rlim; |
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1890 if (getrlimit (RLIMIT_CORE, &rlim) != 0) |
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1891 fatal_error ("getting core file size maximum limit: %m"); |
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1892 rlim.rlim_cur = rlim.rlim_max; |
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1893 if (setrlimit (RLIMIT_CORE, &rlim) != 0) |
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1894 fatal_error ("setting core file size limit to maximum: %m"); |
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1895 } |
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1896 #endif |
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1897 diagnostic_abort_on_error (dc); |
0 | 1898 } |
1899 | |
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1900 /* Parse a -d<ARG> command line switch for OPTS, location LOC, |
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1901 diagnostic context DC. */ |
0 | 1902 |
67
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1903 static void |
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1904 decode_d_option (const char *arg, struct gcc_options *opts, |
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1905 location_t loc, diagnostic_context *dc) |
0 | 1906 { |
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1907 int c; |
0 | 1908 |
67
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1909 while (*arg) |
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1910 switch (c = *arg++) |
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1911 { |
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1912 case 'A': |
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1913 opts->x_flag_debug_asm = 1; |
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1914 break; |
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1915 case 'p': |
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1916 opts->x_flag_print_asm_name = 1; |
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1917 break; |
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1918 case 'P': |
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1919 opts->x_flag_dump_rtl_in_asm = 1; |
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1920 opts->x_flag_print_asm_name = 1; |
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1921 break; |
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1922 case 'v': |
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1923 opts->x_graph_dump_format = vcg; |
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1924 break; |
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1925 case 'x': |
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1926 opts->x_rtl_dump_and_exit = 1; |
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1927 break; |
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1928 case 'D': /* These are handled by the preprocessor. */ |
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1929 case 'I': |
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1930 case 'M': |
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1931 case 'N': |
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1932 case 'U': |
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1933 break; |
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1934 case 'H': |
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1935 setup_core_dumping (dc); |
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1936 break; |
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1937 case 'a': |
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1938 opts->x_flag_dump_all_passed = true; |
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1939 break; |
0 | 1940 |
67
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1941 default: |
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1942 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c); |
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1943 break; |
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1944 } |
0 | 1945 } |
1946 | |
67
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1947 /* Enable (or disable if VALUE is 0) a warning option ARG (language |
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1948 mask LANG_MASK, option handlers HANDLERS) as an error for option |
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1949 structures OPTS and OPTS_SET, diagnostic context DC (possibly |
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1950 NULL), location LOC. This is used by -Werror=. */ |
55
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1951 |
67
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1952 static void |
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1953 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask, |
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1954 const struct cl_option_handlers *handlers, |
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1955 struct gcc_options *opts, |
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1956 struct gcc_options *opts_set, |
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1957 location_t loc, diagnostic_context *dc) |
0 | 1958 { |
1959 char *new_option; | |
1960 int option_index; | |
1961 | |
1962 new_option = XNEWVEC (char, strlen (arg) + 2); | |
1963 new_option[0] = 'W'; | |
1964 strcpy (new_option + 1, arg); | |
1965 option_index = find_opt (new_option, lang_mask); | |
67
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1966 if (option_index == OPT_SPECIAL_unknown) |
0 | 1967 { |
67
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1968 error_at (loc, "-Werror=%s: no option -%s", arg, new_option); |
0 | 1969 } |
1970 else | |
1971 { | |
63
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1972 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING; |
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1973 |
67
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1974 control_warning_option (option_index, (int) kind, value, |
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1975 loc, lang_mask, |
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1976 handlers, opts, opts_set, dc); |
0 | 1977 } |
1978 free (new_option); | |
1979 } | |
67
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1980 |
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1981 /* Return malloced memory for the name of the option OPTION_INDEX |
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1982 which enabled a diagnostic (context CONTEXT), originally of type |
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1983 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such |
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1984 as -Werror. */ |
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1985 |
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1986 char * |
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1987 option_name (diagnostic_context *context, int option_index, |
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1988 diagnostic_t orig_diag_kind, diagnostic_t diag_kind) |
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1989 { |
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1990 if (option_index) |
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1991 { |
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1992 /* A warning classified as an error. */ |
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1993 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN) |
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1994 && diag_kind == DK_ERROR) |
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1995 return concat (cl_options[OPT_Werror_].opt_text, |
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1996 /* Skip over "-W". */ |
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1997 cl_options[option_index].opt_text + 2, |
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1998 NULL); |
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1999 /* A warning with option. */ |
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2000 else |
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2001 return xstrdup (cl_options[option_index].opt_text); |
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2002 } |
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2003 /* A warning without option classified as an error. */ |
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2004 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN |
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2005 || diag_kind == DK_WARNING) |
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2006 { |
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2007 if (context->warning_as_error_requested) |
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2008 return xstrdup (cl_options[OPT_Werror].opt_text); |
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2009 else |
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2010 return xstrdup (_("enabled by default")); |
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2011 } |
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2012 else |
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2013 return NULL; |
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2014 } |