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2772ef3e | 1 | /* Command line option handling. |
eeef0e45 ILT |
2 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 |
3 | Free Software Foundation, Inc. | |
2772ef3e NB |
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 2, 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 COPYING. If not, write to the Free | |
366ccddb KC |
20 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
2772ef3e NB |
22 | |
23 | #include "config.h" | |
24 | #include "system.h" | |
cf03fd63 | 25 | #include "intl.h" |
2772ef3e NB |
26 | #include "coretypes.h" |
27 | #include "tm.h" | |
28 | #include "tree.h" | |
058de654 NB |
29 | #include "rtl.h" |
30 | #include "ggc.h" | |
31 | #include "output.h" | |
2772ef3e NB |
32 | #include "langhooks.h" |
33 | #include "opts.h" | |
d7b42618 NB |
34 | #include "options.h" |
35 | #include "flags.h" | |
36 | #include "toplev.h" | |
903caebf | 37 | #include "params.h" |
de32c0cb | 38 | #include "diagnostic.h" |
9756310a | 39 | #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */ |
d6553b54 | 40 | #include "insn-attr.h" /* For INSN_SCHEDULING. */ |
221ee7c9 | 41 | #include "target.h" |
ef330312 | 42 | #include "tree-pass.h" |
2772ef3e | 43 | |
d185d268 NB |
44 | /* Value of the -G xx switch, and whether it was passed or not. */ |
45 | unsigned HOST_WIDE_INT g_switch_value; | |
46 | bool g_switch_set; | |
47 | ||
48 | /* True if we should exit after parsing options. */ | |
49 | bool exit_after_options; | |
50 | ||
e01cc6dc NB |
51 | /* Print various extra warnings. -W/-Wextra. */ |
52 | bool extra_warnings; | |
53 | ||
e01cc6dc NB |
54 | /* True to warn about any objects definitions whose size is larger |
55 | than N bytes. Also want about function definitions whose returned | |
56 | values are larger than N bytes, where N is `larger_than_size'. */ | |
57 | bool warn_larger_than; | |
58 | HOST_WIDE_INT larger_than_size; | |
59 | ||
e01cc6dc NB |
60 | /* Nonzero means warn about constructs which might not be |
61 | strict-aliasing safe. */ | |
5399d643 | 62 | int warn_strict_aliasing; |
e01cc6dc | 63 | |
6ac01510 ILT |
64 | /* Nonzero means warn about optimizations which rely on undefined |
65 | signed overflow. */ | |
66 | int warn_strict_overflow; | |
67 | ||
903caebf NB |
68 | /* Hack for cooperation between set_Wunused and set_Wextra. */ |
69 | static bool maybe_warn_unused_parameter; | |
70 | ||
df38ffef NB |
71 | /* Type(s) of debugging information we are producing (if any). See |
72 | flags.h for the definitions of the different possible types of | |
73 | debugging information. */ | |
74 | enum debug_info_type write_symbols = NO_DEBUG; | |
75 | ||
76 | /* Level of debugging information we are producing. See flags.h for | |
77 | the definitions of the different possible levels. */ | |
78 | enum debug_info_level debug_info_level = DINFO_LEVEL_NONE; | |
79 | ||
80 | /* Nonzero means use GNU-only extensions in the generated symbolic | |
81 | debugging information. Currently, this only has an effect when | |
82 | write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */ | |
83 | bool use_gnu_debug_info_extensions; | |
84 | ||
d7afec4b ND |
85 | /* The default visibility for all symbols (unless overridden) */ |
86 | enum symbol_visibility default_visibility = VISIBILITY_DEFAULT; | |
87 | ||
46fd0f8c JH |
88 | /* Disable unit-at-a-time for frontends that might be still broken in this |
89 | respect. */ | |
c662432e | 90 | |
46fd0f8c JH |
91 | bool no_unit_at_a_time_default; |
92 | ||
d7afec4b ND |
93 | /* Global visibility options. */ |
94 | struct visibility_flags visibility_options; | |
95 | ||
2cc98056 NB |
96 | /* What to print when a switch has no documentation. */ |
97 | static const char undocumented_msg[] = N_("This switch lacks documentation"); | |
98 | ||
a8a5f53a JH |
99 | /* Used for bookkeeping on whether user set these flags so |
100 | -fprofile-use/-fprofile-generate does not use them. */ | |
101 | static bool profile_arc_flag_set, flag_profile_values_set; | |
102 | static bool flag_unroll_loops_set, flag_tracer_set; | |
103 | static bool flag_value_profile_transformations_set; | |
104 | static bool flag_peel_loops_set, flag_branch_probabilities_set; | |
105 | ||
59e4e217 | 106 | /* Input file names. */ |
40e941af PB |
107 | const char **in_fnames; |
108 | unsigned num_in_fnames; | |
109 | ||
79cf5994 DD |
110 | static int common_handle_option (size_t scode, const char *arg, int value, |
111 | unsigned int lang_mask); | |
903caebf NB |
112 | static void handle_param (const char *); |
113 | static void set_Wextra (int); | |
b86f6cd9 | 114 | static unsigned int handle_option (const char **argv, unsigned int lang_mask); |
f18754d6 NB |
115 | static char *write_langs (unsigned int lang_mask); |
116 | static void complain_wrong_lang (const char *, const struct cl_option *, | |
117 | unsigned int lang_mask); | |
b86f6cd9 | 118 | static void handle_options (unsigned int, const char **, unsigned int); |
df38ffef NB |
119 | static void set_debug_level (enum debug_info_type type, int extended, |
120 | const char *arg); | |
2772ef3e | 121 | |
e01cc6dc | 122 | /* If ARG is a non-negative integer made up solely of digits, return its |
7b086b11 NB |
123 | value, otherwise return -1. */ |
124 | static int | |
125 | integral_argument (const char *arg) | |
126 | { | |
127 | const char *p = arg; | |
128 | ||
129 | while (*p && ISDIGIT (*p)) | |
130 | p++; | |
131 | ||
132 | if (*p == '\0') | |
133 | return atoi (arg); | |
134 | ||
135 | return -1; | |
136 | } | |
137 | ||
f18754d6 NB |
138 | /* Return a malloced slash-separated list of languages in MASK. */ |
139 | static char * | |
140 | write_langs (unsigned int mask) | |
141 | { | |
142 | unsigned int n = 0, len = 0; | |
143 | const char *lang_name; | |
144 | char *result; | |
145 | ||
146 | for (n = 0; (lang_name = lang_names[n]) != 0; n++) | |
147 | if (mask & (1U << n)) | |
148 | len += strlen (lang_name) + 1; | |
149 | ||
5ed6ace5 | 150 | result = XNEWVEC (char, len); |
f18754d6 NB |
151 | len = 0; |
152 | for (n = 0; (lang_name = lang_names[n]) != 0; n++) | |
153 | if (mask & (1U << n)) | |
154 | { | |
155 | if (len) | |
156 | result[len++] = '/'; | |
157 | strcpy (result + len, lang_name); | |
158 | len += strlen (lang_name); | |
159 | } | |
160 | ||
161 | result[len] = 0; | |
162 | ||
163 | return result; | |
164 | } | |
165 | ||
166 | /* Complain that switch OPT_INDEX does not apply to this front end. */ | |
167 | static void | |
168 | complain_wrong_lang (const char *text, const struct cl_option *option, | |
169 | unsigned int lang_mask) | |
170 | { | |
171 | char *ok_langs, *bad_lang; | |
172 | ||
173 | ok_langs = write_langs (option->flags); | |
174 | bad_lang = write_langs (lang_mask); | |
175 | ||
176 | /* Eventually this should become a hard error IMO. */ | |
d4ee4d25 | 177 | warning (0, "command line option \"%s\" is valid for %s but not for %s", |
f18754d6 NB |
178 | text, ok_langs, bad_lang); |
179 | ||
180 | free (ok_langs); | |
181 | free (bad_lang); | |
182 | } | |
183 | ||
184 | /* Handle the switch beginning at ARGV for the language indicated by | |
185 | LANG_MASK. Returns the number of switches consumed. */ | |
186 | static unsigned int | |
b86f6cd9 | 187 | handle_option (const char **argv, unsigned int lang_mask) |
2772ef3e NB |
188 | { |
189 | size_t opt_index; | |
190 | const char *opt, *arg = 0; | |
191 | char *dup = 0; | |
7b086b11 | 192 | int value = 1; |
f18754d6 | 193 | unsigned int result = 0; |
2772ef3e NB |
194 | const struct cl_option *option; |
195 | ||
2772ef3e NB |
196 | opt = argv[0]; |
197 | ||
75685792 RS |
198 | opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET); |
199 | if (opt_index == cl_options_count | |
200 | && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm') | |
cb66e385 | 201 | && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-') |
2772ef3e | 202 | { |
75685792 | 203 | /* Drop the "no-" from negative switches. */ |
cb66e385 NB |
204 | size_t len = strlen (opt) - 3; |
205 | ||
5ed6ace5 | 206 | dup = XNEWVEC (char, len + 1); |
cb66e385 NB |
207 | dup[0] = '-'; |
208 | dup[1] = opt[1]; | |
209 | memcpy (dup + 2, opt + 5, len - 2 + 1); | |
210 | opt = dup; | |
211 | value = 0; | |
75685792 | 212 | opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET); |
2772ef3e | 213 | } |
2772ef3e | 214 | |
cb66e385 | 215 | if (opt_index == cl_options_count) |
bacf5b96 | 216 | goto done; |
2772ef3e | 217 | |
cb66e385 | 218 | option = &cl_options[opt_index]; |
2772ef3e | 219 | |
cb66e385 NB |
220 | /* Reject negative form of switches that don't take negatives as |
221 | unrecognized. */ | |
222 | if (!value && (option->flags & CL_REJECT_NEGATIVE)) | |
223 | goto done; | |
2772ef3e | 224 | |
cb66e385 NB |
225 | /* We've recognized this switch. */ |
226 | result = 1; | |
2772ef3e | 227 | |
aeb70e78 RS |
228 | /* Check to see if the option is disabled for this configuration. */ |
229 | if (option->flags & CL_DISABLED) | |
230 | { | |
231 | error ("command line option %qs" | |
232 | " is not supported by this configuration", opt); | |
233 | goto done; | |
234 | } | |
235 | ||
cb66e385 NB |
236 | /* Sort out any argument the switch takes. */ |
237 | if (option->flags & CL_JOINED) | |
238 | { | |
239 | /* Have arg point to the original switch. This is because | |
240 | some code, such as disable_builtin_function, expects its | |
241 | argument to be persistent until the program exits. */ | |
242 | arg = argv[0] + cl_options[opt_index].opt_len + 1; | |
243 | if (!value) | |
244 | arg += strlen ("no-"); | |
245 | ||
246 | if (*arg == '\0' && !(option->flags & CL_MISSING_OK)) | |
2772ef3e | 247 | { |
cb66e385 | 248 | if (option->flags & CL_SEPARATE) |
2772ef3e | 249 | { |
cb66e385 NB |
250 | arg = argv[1]; |
251 | result = 2; | |
2772ef3e | 252 | } |
cb66e385 NB |
253 | else |
254 | /* Missing argument. */ | |
255 | arg = NULL; | |
7b086b11 | 256 | } |
cb66e385 NB |
257 | } |
258 | else if (option->flags & CL_SEPARATE) | |
259 | { | |
260 | arg = argv[1]; | |
261 | result = 2; | |
262 | } | |
2772ef3e | 263 | |
cb66e385 NB |
264 | /* Now we've swallowed any potential argument, complain if this |
265 | is a switch for a different front end. */ | |
75685792 | 266 | if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET))) |
cb66e385 NB |
267 | { |
268 | complain_wrong_lang (argv[0], option, lang_mask); | |
269 | goto done; | |
270 | } | |
1f1d5130 MS |
271 | else if ((option->flags & CL_TARGET) |
272 | && (option->flags & CL_LANG_ALL) | |
273 | && !(option->flags & lang_mask)) | |
274 | { | |
275 | /* Complain for target flag language mismatches if any languages | |
276 | are specified. */ | |
277 | complain_wrong_lang (argv[0], option, lang_mask); | |
278 | goto done; | |
279 | } | |
f18754d6 | 280 | |
cb66e385 NB |
281 | if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE))) |
282 | { | |
ae2bcd98 | 283 | if (!lang_hooks.missing_argument (opt, opt_index)) |
cb66e385 NB |
284 | error ("missing argument to \"%s\"", opt); |
285 | goto done; | |
286 | } | |
9eee5e72 | 287 | |
cb66e385 NB |
288 | /* If the switch takes an integer, convert it. */ |
289 | if (arg && (option->flags & CL_UINTEGER)) | |
290 | { | |
291 | value = integral_argument (arg); | |
292 | if (value == -1) | |
7b086b11 | 293 | { |
cf03fd63 | 294 | error ("argument to \"%s\" should be a non-negative integer", |
cb66e385 NB |
295 | option->opt_text); |
296 | goto done; | |
2772ef3e | 297 | } |
cb66e385 | 298 | } |
2772ef3e | 299 | |
50431bc4 | 300 | if (option->flag_var) |
55bea00a | 301 | switch (option->var_type) |
75685792 RS |
302 | { |
303 | case CLVC_BOOLEAN: | |
55bea00a | 304 | *(int *) option->flag_var = value; |
75685792 RS |
305 | break; |
306 | ||
307 | case CLVC_EQUAL: | |
55bea00a RS |
308 | *(int *) option->flag_var = (value |
309 | ? option->var_value | |
310 | : !option->var_value); | |
75685792 RS |
311 | break; |
312 | ||
313 | case CLVC_BIT_CLEAR: | |
314 | case CLVC_BIT_SET: | |
55bea00a RS |
315 | if ((value != 0) == (option->var_type == CLVC_BIT_SET)) |
316 | *(int *) option->flag_var |= option->var_value; | |
75685792 | 317 | else |
55bea00a | 318 | *(int *) option->flag_var &= ~option->var_value; |
75685792 RS |
319 | if (option->flag_var == &target_flags) |
320 | target_flags_explicit |= option->var_value; | |
321 | break; | |
55bea00a RS |
322 | |
323 | case CLVC_STRING: | |
324 | *(const char **) option->flag_var = arg; | |
325 | break; | |
75685792 | 326 | } |
c662432e | 327 | |
cb66e385 | 328 | if (option->flags & lang_mask) |
ae2bcd98 | 329 | if (lang_hooks.handle_option (opt_index, arg, value) == 0) |
cb66e385 | 330 | result = 0; |
d7b42618 | 331 | |
cb66e385 | 332 | if (result && (option->flags & CL_COMMON)) |
79cf5994 | 333 | if (common_handle_option (opt_index, arg, value, lang_mask) == 0) |
cb66e385 | 334 | result = 0; |
2772ef3e | 335 | |
75685792 RS |
336 | if (result && (option->flags & CL_TARGET)) |
337 | if (!targetm.handle_option (opt_index, arg, value)) | |
338 | result = 0; | |
339 | ||
2772ef3e NB |
340 | done: |
341 | if (dup) | |
342 | free (dup); | |
343 | return result; | |
344 | } | |
d7b42618 | 345 | |
2715d4a3 BE |
346 | /* Handle FILENAME from the command line. */ |
347 | static void | |
348 | add_input_filename (const char *filename) | |
349 | { | |
350 | num_in_fnames++; | |
351 | in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0])); | |
352 | in_fnames[num_in_fnames - 1] = filename; | |
353 | } | |
354 | ||
f18754d6 NB |
355 | /* Decode and handle the vector of command line options. LANG_MASK |
356 | contains has a single bit set representing the current | |
357 | language. */ | |
9756310a | 358 | static void |
b86f6cd9 | 359 | handle_options (unsigned int argc, const char **argv, unsigned int lang_mask) |
f18754d6 NB |
360 | { |
361 | unsigned int n, i; | |
362 | ||
363 | for (i = 1; i < argc; i += n) | |
364 | { | |
cb66e385 NB |
365 | const char *opt = argv[i]; |
366 | ||
367 | /* Interpret "-" or a non-switch as a file name. */ | |
368 | if (opt[0] != '-' || opt[1] == '\0') | |
369 | { | |
8e9ea4d7 PB |
370 | if (main_input_filename == NULL) |
371 | main_input_filename = opt; | |
40e941af | 372 | add_input_filename (opt); |
cb66e385 NB |
373 | n = 1; |
374 | continue; | |
375 | } | |
376 | ||
f18754d6 NB |
377 | n = handle_option (argv + i, lang_mask); |
378 | ||
379 | if (!n) | |
380 | { | |
381 | n = 1; | |
cb66e385 | 382 | error ("unrecognized command line option \"%s\"", opt); |
f18754d6 NB |
383 | } |
384 | } | |
385 | } | |
386 | ||
9756310a NB |
387 | /* Parse command line options and set default flag values. Do minimal |
388 | options processing. */ | |
389 | void | |
b86f6cd9 | 390 | decode_options (unsigned int argc, const char **argv) |
9756310a | 391 | { |
b86f6cd9 | 392 | unsigned int i, lang_mask; |
9756310a NB |
393 | |
394 | /* Perform language-specific options initialization. */ | |
ae2bcd98 | 395 | lang_mask = lang_hooks.init_options (argc, argv); |
9756310a | 396 | |
21ecc5a7 GDR |
397 | lang_hooks.initialize_diagnostics (global_dc); |
398 | ||
9756310a NB |
399 | /* Scan to see what optimization level has been specified. That will |
400 | determine the default value of many flags. */ | |
401 | for (i = 1; i < argc; i++) | |
402 | { | |
403 | if (!strcmp (argv[i], "-O")) | |
404 | { | |
405 | optimize = 1; | |
406 | optimize_size = 0; | |
407 | } | |
408 | else if (argv[i][0] == '-' && argv[i][1] == 'O') | |
409 | { | |
410 | /* Handle -Os, -O2, -O3, -O69, ... */ | |
b86f6cd9 | 411 | const char *p = &argv[i][2]; |
9756310a NB |
412 | |
413 | if ((p[0] == 's') && (p[1] == 0)) | |
414 | { | |
415 | optimize_size = 1; | |
416 | ||
417 | /* Optimizing for size forces optimize to be 2. */ | |
418 | optimize = 2; | |
419 | } | |
420 | else | |
421 | { | |
422 | const int optimize_val = read_integral_parameter (p, p - 2, -1); | |
423 | if (optimize_val != -1) | |
424 | { | |
425 | optimize = optimize_val; | |
426 | optimize_size = 0; | |
427 | } | |
428 | } | |
429 | } | |
430 | } | |
431 | ||
432 | if (!optimize) | |
433 | { | |
434 | flag_merge_constants = 0; | |
435 | } | |
436 | ||
437 | if (optimize >= 1) | |
438 | { | |
439 | flag_defer_pop = 1; | |
9756310a NB |
440 | #ifdef DELAY_SLOTS |
441 | flag_delayed_branch = 1; | |
442 | #endif | |
443 | #ifdef CAN_DEBUG_WITHOUT_FP | |
444 | flag_omit_frame_pointer = 1; | |
445 | #endif | |
446 | flag_guess_branch_prob = 1; | |
447 | flag_cprop_registers = 1; | |
9756310a NB |
448 | flag_if_conversion = 1; |
449 | flag_if_conversion2 = 1; | |
ea900239 DB |
450 | flag_ipa_pure_const = 1; |
451 | flag_ipa_reference = 1; | |
e53a16e7 | 452 | flag_split_wide_types = 1; |
6de9cd9a DN |
453 | flag_tree_ccp = 1; |
454 | flag_tree_dce = 1; | |
455 | flag_tree_dom = 1; | |
456 | flag_tree_dse = 1; | |
6de9cd9a | 457 | flag_tree_ter = 1; |
6de9cd9a DN |
458 | flag_tree_sra = 1; |
459 | flag_tree_copyrename = 1; | |
ff2ad0f7 | 460 | flag_tree_fre = 1; |
0bca51f0 | 461 | flag_tree_copy_prop = 1; |
fa555252 | 462 | flag_tree_sink = 1; |
c75ab022 | 463 | flag_tree_salias = 1; |
46fd0f8c JH |
464 | if (!no_unit_at_a_time_default) |
465 | flag_unit_at_a_time = 1; | |
6de9cd9a DN |
466 | |
467 | if (!optimize_size) | |
468 | { | |
469 | /* Loop header copying usually increases size of the code. This used | |
470 | not to be true, since quite often it is possible to verify that | |
471 | the condition is satisfied in the first iteration and therefore | |
472 | to eliminate it. Jump threading handles these cases now. */ | |
473 | flag_tree_ch = 1; | |
474 | } | |
9756310a NB |
475 | } |
476 | ||
477 | if (optimize >= 2) | |
478 | { | |
116cb604 | 479 | flag_thread_jumps = 1; |
b684a3df | 480 | flag_crossjumping = 1; |
9756310a | 481 | flag_optimize_sibling_calls = 1; |
a52b023a | 482 | flag_forward_propagate = 1; |
9756310a | 483 | flag_cse_follow_jumps = 1; |
9756310a NB |
484 | flag_gcse = 1; |
485 | flag_expensive_optimizations = 1; | |
ea900239 | 486 | flag_ipa_type_escape = 1; |
9756310a | 487 | flag_rerun_cse_after_loop = 1; |
9756310a | 488 | flag_caller_saves = 1; |
9756310a NB |
489 | flag_peephole2 = 1; |
490 | #ifdef INSN_SCHEDULING | |
491 | flag_schedule_insns = 1; | |
492 | flag_schedule_insns_after_reload = 1; | |
493 | #endif | |
494 | flag_regmove = 1; | |
495 | flag_strict_aliasing = 1; | |
eeef0e45 | 496 | flag_strict_overflow = 1; |
9756310a NB |
497 | flag_delete_null_pointer_checks = 1; |
498 | flag_reorder_blocks = 1; | |
499 | flag_reorder_functions = 1; | |
0bca51f0 DN |
500 | flag_tree_store_ccp = 1; |
501 | flag_tree_store_copy_prop = 1; | |
502 | flag_tree_vrp = 1; | |
116cb604 SB |
503 | |
504 | if (!optimize_size) | |
505 | { | |
506 | /* PRE tends to generate bigger code. */ | |
507 | flag_tree_pre = 1; | |
508 | } | |
9756310a NB |
509 | } |
510 | ||
511 | if (optimize >= 3) | |
512 | { | |
513 | flag_inline_functions = 1; | |
9756310a | 514 | flag_unswitch_loops = 1; |
f9957958 | 515 | flag_gcse_after_reload = 1; |
9756310a NB |
516 | } |
517 | ||
518 | if (optimize < 2 || optimize_size) | |
519 | { | |
520 | align_loops = 1; | |
521 | align_jumps = 1; | |
522 | align_labels = 1; | |
523 | align_functions = 1; | |
524 | ||
525 | /* Don't reorder blocks when optimizing for size because extra | |
526 | jump insns may be created; also barrier may create extra padding. | |
527 | ||
528 | More correctly we should have a block reordering mode that tried | |
529 | to minimize the combined size of all the jumps. This would more | |
530 | or less automatically remove extra jumps, but would also try to | |
531 | use more short jumps instead of long jumps. */ | |
532 | flag_reorder_blocks = 0; | |
750054a2 | 533 | flag_reorder_blocks_and_partition = 0; |
9756310a NB |
534 | } |
535 | ||
f736cb3e GL |
536 | if (optimize_size) |
537 | { | |
538 | /* Inlining of very small functions usually reduces total size. */ | |
539 | set_param_value ("max-inline-insns-single", 5); | |
540 | set_param_value ("max-inline-insns-auto", 5); | |
f736cb3e | 541 | flag_inline_functions = 1; |
fe94b653 RE |
542 | |
543 | /* We want to crossjump as much as possible. */ | |
544 | set_param_value ("min-crossjump-insns", 1); | |
f736cb3e GL |
545 | } |
546 | ||
9756310a NB |
547 | /* Initialize whether `char' is signed. */ |
548 | flag_signed_char = DEFAULT_SIGNED_CHAR; | |
32770746 PB |
549 | /* Set this to a special "uninitialized" value. The actual default is set |
550 | after target options have been processed. */ | |
551 | flag_short_enums = 2; | |
9756310a NB |
552 | |
553 | /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can | |
554 | modify it. */ | |
75685792 | 555 | target_flags = targetm.default_target_flags; |
9756310a | 556 | |
617a1b71 PB |
557 | /* Some tagets have ABI-specified unwind tables. */ |
558 | flag_unwind_tables = targetm.unwind_tables_default; | |
9756310a NB |
559 | |
560 | #ifdef OPTIMIZATION_OPTIONS | |
561 | /* Allow default optimizations to be specified on a per-machine basis. */ | |
562 | OPTIMIZATION_OPTIONS (optimize, optimize_size); | |
563 | #endif | |
564 | ||
565 | handle_options (argc, argv, lang_mask); | |
566 | ||
567 | if (flag_pie) | |
568 | flag_pic = flag_pie; | |
569 | if (flag_pic && !flag_pie) | |
570 | flag_shlib = 1; | |
571 | ||
572 | if (flag_no_inline == 2) | |
573 | flag_no_inline = 0; | |
574 | else | |
575 | flag_really_no_inline = flag_no_inline; | |
576 | ||
577 | /* Set flag_no_inline before the post_options () hook. The C front | |
578 | ends use it to determine tree inlining defaults. FIXME: such | |
579 | code should be lang-independent when all front ends use tree | |
580 | inlining, in which case it, and this condition, should be moved | |
581 | to the top of process_options() instead. */ | |
582 | if (optimize == 0) | |
583 | { | |
584 | /* Inlining does not work if not optimizing, | |
585 | so force it not to be done. */ | |
586 | flag_no_inline = 1; | |
587 | warn_inline = 0; | |
588 | ||
589 | /* The c_decode_option function and decode_option hook set | |
590 | this to `2' if -Wall is used, so we can avoid giving out | |
591 | lots of errors for people who don't realize what -Wall does. */ | |
592 | if (warn_uninitialized == 1) | |
44c21c7f DD |
593 | warning (OPT_Wuninitialized, |
594 | "-Wuninitialized is not supported without -O"); | |
9756310a NB |
595 | } |
596 | ||
597 | if (flag_really_no_inline == 2) | |
598 | flag_really_no_inline = flag_no_inline; | |
750054a2 CT |
599 | |
600 | /* The optimization to partition hot and cold basic blocks into separate | |
601 | sections of the .o and executable files does not work (currently) | |
e395963f JW |
602 | with exception handling. This is because there is no support for |
603 | generating unwind info. If flag_exceptions is turned on we need to | |
750054a2 CT |
604 | turn off the partitioning optimization. */ |
605 | ||
606 | if (flag_exceptions && flag_reorder_blocks_and_partition) | |
607 | { | |
c662432e | 608 | inform |
750054a2 CT |
609 | ("-freorder-blocks-and-partition does not work with exceptions"); |
610 | flag_reorder_blocks_and_partition = 0; | |
611 | flag_reorder_blocks = 1; | |
612 | } | |
c7466dee | 613 | |
e395963f JW |
614 | /* If user requested unwind info, then turn off the partitioning |
615 | optimization. */ | |
616 | ||
617 | if (flag_unwind_tables && ! targetm.unwind_tables_default | |
618 | && flag_reorder_blocks_and_partition) | |
619 | { | |
553fa844 | 620 | inform ("-freorder-blocks-and-partition does not support unwind info"); |
e395963f JW |
621 | flag_reorder_blocks_and_partition = 0; |
622 | flag_reorder_blocks = 1; | |
623 | } | |
624 | ||
625 | /* If the target requested unwind info, then turn off the partitioning | |
626 | optimization with a different message. Likewise, if the target does not | |
627 | support named sections. */ | |
628 | ||
c7466dee | 629 | if (flag_reorder_blocks_and_partition |
e395963f JW |
630 | && (!targetm.have_named_sections |
631 | || (flag_unwind_tables && targetm.unwind_tables_default))) | |
c7466dee | 632 | { |
c662432e | 633 | inform |
c85ce869 | 634 | ("-freorder-blocks-and-partition does not work on this architecture"); |
c7466dee CT |
635 | flag_reorder_blocks_and_partition = 0; |
636 | flag_reorder_blocks = 1; | |
637 | } | |
9756310a NB |
638 | } |
639 | ||
c662432e NC |
640 | #define LEFT_COLUMN 27 |
641 | ||
642 | /* Output ITEM, of length ITEM_WIDTH, in the left column, | |
643 | followed by word-wrapped HELP in a second column. */ | |
644 | static void | |
645 | wrap_help (const char *help, | |
646 | const char *item, | |
647 | unsigned int item_width, | |
648 | unsigned int columns) | |
649 | { | |
650 | unsigned int col_width = LEFT_COLUMN; | |
651 | unsigned int remaining, room, len; | |
652 | ||
653 | remaining = strlen (help); | |
654 | ||
655 | do | |
656 | { | |
657 | room = columns - 3 - MAX (col_width, item_width); | |
658 | if (room > columns) | |
659 | room = 0; | |
660 | len = remaining; | |
661 | ||
662 | if (room < len) | |
663 | { | |
664 | unsigned int i; | |
665 | ||
666 | for (i = 0; help[i]; i++) | |
667 | { | |
668 | if (i >= room && len != remaining) | |
669 | break; | |
670 | if (help[i] == ' ') | |
671 | len = i; | |
672 | else if ((help[i] == '-' || help[i] == '/') | |
673 | && help[i + 1] != ' ' | |
674 | && i > 0 && ISALPHA (help[i - 1])) | |
675 | len = i + 1; | |
676 | } | |
677 | } | |
678 | ||
679 | printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help); | |
680 | item_width = 0; | |
681 | while (help[len] == ' ') | |
682 | len++; | |
683 | help += len; | |
684 | remaining -= len; | |
685 | } | |
686 | while (remaining); | |
687 | } | |
688 | ||
689 | /* Print help for a specific front-end, etc. */ | |
690 | static void | |
691 | print_filtered_help (unsigned int include_flags, | |
692 | unsigned int exclude_flags, | |
693 | unsigned int any_flags, | |
694 | unsigned int columns) | |
695 | { | |
696 | unsigned int i; | |
697 | const char *help; | |
698 | static char *printed = NULL; | |
699 | bool found = false; | |
700 | bool displayed = false; | |
701 | ||
702 | if (include_flags == CL_PARAMS) | |
703 | { | |
704 | for (i = 0; i < LAST_PARAM; i++) | |
705 | { | |
706 | const char *param = compiler_params[i].option; | |
707 | ||
708 | help = compiler_params[i].help; | |
709 | if (help == NULL || *help == '\0') | |
710 | { | |
711 | if (exclude_flags & CL_UNDOCUMENTED) | |
712 | continue; | |
713 | help = undocumented_msg; | |
714 | } | |
715 | ||
716 | /* Get the translation. */ | |
717 | help = _(help); | |
718 | ||
719 | wrap_help (help, param, strlen (param), columns); | |
720 | } | |
721 | putchar ('\n'); | |
722 | return; | |
723 | } | |
724 | ||
725 | if (!printed) | |
726 | printed = xcalloc (1, cl_options_count); | |
727 | ||
728 | for (i = 0; i < cl_options_count; i++) | |
729 | { | |
730 | static char new_help[128]; | |
731 | const struct cl_option *option = cl_options + i; | |
732 | unsigned int len; | |
733 | const char *opt; | |
734 | const char *tab; | |
735 | ||
736 | if (include_flags == 0 | |
737 | || ((option->flags & include_flags) != include_flags)) | |
738 | { | |
739 | if ((option->flags & any_flags) == 0) | |
740 | continue; | |
741 | } | |
742 | ||
743 | /* Skip unwanted switches. */ | |
744 | if ((option->flags & exclude_flags) != 0) | |
745 | continue; | |
746 | ||
747 | found = true; | |
748 | /* Skip switches that have already been printed. */ | |
749 | if (printed[i]) | |
750 | continue; | |
751 | ||
752 | printed[i] = true; | |
753 | ||
754 | help = option->help; | |
755 | if (help == NULL) | |
756 | { | |
757 | if (exclude_flags & CL_UNDOCUMENTED) | |
758 | continue; | |
759 | help = undocumented_msg; | |
760 | } | |
761 | ||
762 | /* Get the translation. */ | |
763 | help = _(help); | |
764 | ||
765 | /* Find the gap between the name of the | |
766 | option and its descriptive text. */ | |
767 | tab = strchr (help, '\t'); | |
768 | if (tab) | |
769 | { | |
770 | len = tab - help; | |
771 | opt = help; | |
772 | help = tab + 1; | |
773 | } | |
774 | else | |
775 | { | |
776 | opt = option->opt_text; | |
777 | len = strlen (opt); | |
778 | } | |
779 | ||
780 | /* With the -Q option enabled we change the descriptive text associated | |
781 | with an option to be an indication of its current setting. */ | |
782 | if (!quiet_flag) | |
783 | { | |
784 | if (len < (LEFT_COLUMN + 2)) | |
785 | strcpy (new_help, "\t\t"); | |
786 | else | |
787 | strcpy (new_help, "\t"); | |
788 | ||
789 | if (option->flag_var != NULL) | |
790 | { | |
791 | if (option->flags & CL_JOINED) | |
792 | { | |
793 | if (option->var_type == CLVC_STRING) | |
794 | { | |
795 | if (* (const char **) option->flag_var != NULL) | |
796 | snprintf (new_help + strlen (new_help), | |
797 | sizeof (new_help) - strlen (new_help), | |
798 | * (const char **) option->flag_var); | |
799 | } | |
800 | else | |
801 | sprintf (new_help + strlen (new_help), | |
802 | "%#x", * (int *) option->flag_var); | |
803 | } | |
804 | else | |
805 | strcat (new_help, option_enabled (i) | |
806 | ? _("[enabled]") : _("[disabled]")); | |
807 | } | |
808 | ||
809 | help = new_help; | |
810 | } | |
811 | ||
812 | wrap_help (help, opt, len, columns); | |
813 | displayed = true; | |
814 | } | |
815 | ||
816 | if (! found) | |
817 | printf (_(" No options with the desired characteristics were found\n")); | |
818 | else if (! displayed) | |
819 | printf (_(" All options with the desired characteristics have already been displayed\n")); | |
820 | ||
821 | putchar ('\n'); | |
822 | } | |
823 | ||
824 | /* Display help for a specified type of option. | |
825 | The options must have ALL of the INCLUDE_FLAGS set | |
826 | ANY of the flags in the ANY_FLAGS set | |
827 | and NONE of the EXCLUDE_FLAGS set. */ | |
828 | static void | |
829 | print_specific_help (unsigned int include_flags, | |
830 | unsigned int exclude_flags, | |
831 | unsigned int any_flags) | |
832 | { | |
833 | unsigned int all_langs_mask = (1U << cl_lang_count) - 1; | |
834 | const char * description = NULL; | |
835 | const char * descrip_extra = ""; | |
836 | size_t i; | |
837 | unsigned int flag; | |
838 | static unsigned int columns = 0; | |
839 | ||
840 | /* Sanity check: Make sure that we do not have more | |
841 | languages than we have bits available to enumerate them. */ | |
842 | gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS); | |
843 | ||
844 | /* If we have not done so already, obtain | |
845 | the desired maximum width of the output. */ | |
846 | if (columns == 0) | |
847 | { | |
848 | const char *p; | |
849 | ||
850 | GET_ENVIRONMENT (p, "COLUMNS"); | |
851 | if (p != NULL) | |
852 | { | |
853 | int value = atoi (p); | |
854 | ||
855 | if (value > 0) | |
856 | columns = value; | |
857 | } | |
858 | ||
859 | if (columns == 0) | |
860 | /* Use a reasonable default. */ | |
861 | columns = 80; | |
862 | } | |
863 | ||
864 | /* Decide upon the title for the options that we are going to display. */ | |
865 | for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++) | |
866 | { | |
867 | switch (flag & include_flags) | |
868 | { | |
869 | case 0: | |
870 | break; | |
871 | ||
872 | case CL_TARGET: | |
873 | description = _("The following options are target specific"); | |
874 | break; | |
875 | case CL_WARNING: | |
876 | description = _("The following options control compiler warning messages"); | |
877 | break; | |
878 | case CL_OPTIMIZATION: | |
879 | description = _("The following options control optimizations"); | |
880 | break; | |
881 | case CL_COMMON: | |
882 | description = _("The following options are language-independent"); | |
883 | break; | |
884 | case CL_PARAMS: | |
885 | description = _("The --param option recognizes the following as parameters"); | |
886 | break; | |
887 | default: | |
888 | if (i >= cl_lang_count) | |
889 | break; | |
890 | if ((exclude_flags & ((1U << cl_lang_count) - 1)) != 0) | |
891 | { | |
892 | description = _("The following options are specific to the language "); | |
893 | descrip_extra = lang_names [i]; | |
894 | } | |
895 | else | |
896 | description = _("The following options are supported by, amoung others, the language "); | |
897 | break; | |
898 | } | |
899 | } | |
900 | ||
901 | if (description == NULL) | |
902 | { | |
903 | if (any_flags == 0) | |
904 | { | |
905 | if (include_flags == CL_UNDOCUMENTED) | |
906 | description = _("The following options are not documented"); | |
907 | else | |
908 | { | |
909 | internal_error ("unrecognized include_flags 0x%x passed to print_specific_help", | |
910 | include_flags); | |
911 | return; | |
912 | } | |
913 | } | |
914 | else | |
915 | { | |
916 | if (any_flags & all_langs_mask) | |
917 | description = _("The following options are language-related"); | |
918 | else | |
919 | description = _("The following options are language-independent"); | |
920 | } | |
921 | } | |
922 | ||
923 | printf ("%s%s:\n", description, descrip_extra); | |
924 | print_filtered_help (include_flags, exclude_flags, any_flags, columns); | |
925 | } | |
926 | ||
d7b42618 | 927 | /* Handle target- and language-independent options. Return zero to |
50431bc4 ZD |
928 | generate an "unknown option" message. Only options that need |
929 | extra handling need to be listed here; if you simply want | |
930 | VALUE assigned to a variable, it happens automatically. */ | |
931 | ||
d7b42618 | 932 | static int |
79cf5994 DD |
933 | common_handle_option (size_t scode, const char *arg, int value, |
934 | unsigned int lang_mask) | |
d7b42618 | 935 | { |
d7b42618 NB |
936 | enum opt_code code = (enum opt_code) scode; |
937 | ||
d7b42618 NB |
938 | switch (code) |
939 | { | |
903caebf NB |
940 | case OPT__param: |
941 | handle_param (arg); | |
942 | break; | |
943 | ||
c662432e NC |
944 | case OPT_fhelp: |
945 | case OPT__help: | |
946 | { | |
947 | unsigned int all_langs_mask = (1U << cl_lang_count) - 1; | |
948 | unsigned int undoc_mask; | |
949 | unsigned int i; | |
950 | ||
951 | undoc_mask = extra_warnings ? 0 : CL_UNDOCUMENTED; | |
952 | /* First display any single language specific options. */ | |
953 | for (i = 0; i < cl_lang_count; i++) | |
954 | print_specific_help | |
955 | (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0); | |
956 | /* Next display any multi language specific options. */ | |
957 | print_specific_help (0, undoc_mask, all_langs_mask); | |
958 | /* Then display any remaining, non-language options. */ | |
959 | for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1) | |
960 | print_specific_help (i, undoc_mask, 0); | |
961 | exit_after_options = true; | |
962 | break; | |
963 | } | |
964 | ||
965 | case OPT_ftarget_help: | |
d185d268 | 966 | case OPT__target_help: |
c662432e | 967 | print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0); |
d185d268 NB |
968 | exit_after_options = true; |
969 | break; | |
970 | ||
c662432e NC |
971 | case OPT_fhelp_: |
972 | case OPT__help_: | |
973 | { | |
974 | const char * a = arg; | |
975 | unsigned int include_flags = 0; | |
976 | /* Note - by default we include undocumented options when listing | |
977 | specific classes. If you only want to see documented options | |
978 | then add ",^undocumented" to the --help= option. e.g.: | |
979 | ||
980 | --help=target,^undocumented */ | |
981 | unsigned int exclude_flags = 0; | |
982 | ||
983 | /* Walk along the argument string, parsing each word in turn. | |
984 | The format is: | |
985 | arg = [^]{word}[,{arg}] | |
986 | word = {optimizers|target|warnings|undocumented|params} */ | |
987 | while (* a != 0) | |
988 | { | |
989 | static struct | |
990 | { | |
991 | const char * string; | |
992 | unsigned int flag; | |
993 | } | |
994 | specifics[] = | |
995 | { | |
996 | { "optimizers", CL_OPTIMIZATION }, | |
997 | { "target", CL_TARGET }, | |
998 | { "warnings", CL_WARNING }, | |
999 | { "undocumented", CL_UNDOCUMENTED }, | |
1000 | { "params", CL_PARAMS }, | |
1001 | { "joined", CL_JOINED }, | |
1002 | { "separate", CL_SEPARATE }, | |
1003 | { NULL, 0 } | |
1004 | }; | |
1005 | unsigned int * pflags; | |
1006 | char * comma; | |
1007 | unsigned int len; | |
1008 | unsigned int i; | |
1009 | ||
1010 | if (* a == '^') | |
1011 | { | |
1012 | ++ a; | |
1013 | pflags = & exclude_flags; | |
1014 | } | |
1015 | else | |
1016 | pflags = & include_flags; | |
1017 | ||
1018 | comma = strchr (a, ','); | |
1019 | if (comma == NULL) | |
1020 | len = strlen (a); | |
1021 | else | |
1022 | len = comma - a; | |
1023 | ||
1024 | for (i = 0; specifics[i].string != NULL; i++) | |
1025 | if (strncasecmp (a, specifics[i].string, len) == 0) | |
1026 | { | |
1027 | * pflags |= specifics[i].flag; | |
1028 | break; | |
1029 | } | |
1030 | ||
1031 | if (specifics[i].string == NULL) | |
1032 | { | |
1033 | /* Check to see if the string matches a language name. */ | |
1034 | for (i = 0; i < cl_lang_count; i++) | |
1035 | if (strncasecmp (a, lang_names[i], len) == 0) | |
1036 | { | |
1037 | * pflags |= 1U << i; | |
1038 | break; | |
1039 | } | |
1040 | ||
1041 | if (i == cl_lang_count) | |
1042 | fnotice (stderr, | |
1043 | "warning: unrecognized argument to --help= switch: %.*s\n", | |
1044 | len, a); | |
1045 | } | |
1046 | ||
1047 | if (comma == NULL) | |
1048 | break; | |
1049 | a = comma + 1; | |
1050 | } | |
1051 | ||
1052 | if (include_flags) | |
1053 | print_specific_help (include_flags, exclude_flags, 0); | |
1054 | exit_after_options = true; | |
1055 | break; | |
1056 | } | |
1057 | ||
d185d268 NB |
1058 | case OPT__version: |
1059 | print_version (stderr, ""); | |
1060 | exit_after_options = true; | |
1061 | break; | |
1062 | ||
1063 | case OPT_G: | |
7b086b11 | 1064 | g_switch_value = value; |
d185d268 NB |
1065 | g_switch_set = true; |
1066 | break; | |
1067 | ||
903caebf NB |
1068 | case OPT_O: |
1069 | case OPT_Os: | |
1070 | /* Currently handled in a prescan. */ | |
1071 | break; | |
1072 | ||
1073 | case OPT_W: | |
1074 | /* For backward compatibility, -W is the same as -Wextra. */ | |
1075 | set_Wextra (value); | |
1076 | break; | |
1077 | ||
79cf5994 | 1078 | case OPT_Werror_: |
dc90f45b | 1079 | enable_warning_as_error (arg, value, lang_mask); |
79cf5994 DD |
1080 | break; |
1081 | ||
903caebf NB |
1082 | case OPT_Wextra: |
1083 | set_Wextra (value); | |
1084 | break; | |
1085 | ||
e01cc6dc NB |
1086 | case OPT_Wlarger_than_: |
1087 | larger_than_size = value; | |
1088 | warn_larger_than = value != -1; | |
1089 | break; | |
1090 | ||
e01cc6dc | 1091 | case OPT_Wstrict_aliasing: |
5399d643 | 1092 | case OPT_Wstrict_aliasing_: |
e01cc6dc NB |
1093 | warn_strict_aliasing = value; |
1094 | break; | |
1095 | ||
6ac01510 ILT |
1096 | case OPT_Wstrict_overflow: |
1097 | case OPT_Wstrict_overflow_: | |
1098 | warn_strict_overflow = value; | |
1099 | break; | |
1100 | ||
903caebf NB |
1101 | case OPT_Wunused: |
1102 | set_Wunused (value); | |
1103 | break; | |
1104 | ||
d185d268 NB |
1105 | case OPT_aux_info: |
1106 | case OPT_aux_info_: | |
1107 | aux_info_file_name = arg; | |
1108 | flag_gen_aux_info = 1; | |
1109 | break; | |
1110 | ||
1111 | case OPT_auxbase: | |
1112 | aux_base_name = arg; | |
1113 | break; | |
1114 | ||
1115 | case OPT_auxbase_strip: | |
1116 | { | |
1117 | char *tmp = xstrdup (arg); | |
1118 | strip_off_ending (tmp, strlen (tmp)); | |
1119 | if (tmp[0]) | |
1120 | aux_base_name = tmp; | |
1121 | } | |
1122 | break; | |
1123 | ||
1124 | case OPT_d: | |
1125 | decode_d_option (arg); | |
1126 | break; | |
1127 | ||
1128 | case OPT_dumpbase: | |
1129 | dump_base_name = arg; | |
1130 | break; | |
1131 | ||
0fcd5dda NB |
1132 | case OPT_falign_functions_: |
1133 | align_functions = value; | |
1134 | break; | |
1135 | ||
0fcd5dda NB |
1136 | case OPT_falign_jumps_: |
1137 | align_jumps = value; | |
1138 | break; | |
1139 | ||
0fcd5dda NB |
1140 | case OPT_falign_labels_: |
1141 | align_labels = value; | |
1142 | break; | |
1143 | ||
0fcd5dda NB |
1144 | case OPT_falign_loops_: |
1145 | align_loops = value; | |
1146 | break; | |
1147 | ||
6ff3a151 | 1148 | case OPT_fbranch_probabilities: |
a8a5f53a | 1149 | flag_branch_probabilities_set = true; |
1194fc79 R |
1150 | break; |
1151 | ||
058de654 NB |
1152 | case OPT_fcall_used_: |
1153 | fix_register (arg, 0, 1); | |
1154 | break; | |
1155 | ||
1156 | case OPT_fcall_saved_: | |
1157 | fix_register (arg, 0, 0); | |
1158 | break; | |
1159 | ||
de32c0cb NB |
1160 | case OPT_fdiagnostics_show_location_: |
1161 | if (!strcmp (arg, "once")) | |
1162 | diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; | |
1163 | else if (!strcmp (arg, "every-line")) | |
1164 | diagnostic_prefixing_rule (global_dc) | |
1165 | = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE; | |
1166 | else | |
1167 | return 0; | |
1168 | break; | |
1169 | ||
2098fe9e DD |
1170 | case OPT_fdiagnostics_show_option: |
1171 | global_dc->show_option_requested = true; | |
1172 | break; | |
1173 | ||
6de9cd9a DN |
1174 | case OPT_fdump_: |
1175 | if (!dump_switch_p (arg)) | |
1176 | return 0; | |
1177 | break; | |
1178 | ||
058de654 NB |
1179 | case OPT_ffast_math: |
1180 | set_fast_math_flags (value); | |
1181 | break; | |
1182 | ||
1183 | case OPT_ffixed_: | |
1184 | fix_register (arg, 1, 1); | |
1185 | break; | |
1186 | ||
d302c9d6 NB |
1187 | case OPT_finline_limit_: |
1188 | case OPT_finline_limit_eq: | |
d302c9d6 NB |
1189 | set_param_value ("max-inline-insns-single", value / 2); |
1190 | set_param_value ("max-inline-insns-auto", value / 2); | |
d302c9d6 NB |
1191 | break; |
1192 | ||
de32c0cb | 1193 | case OPT_fmessage_length_: |
b6fe0bb8 | 1194 | pp_set_line_maximum_length (global_dc->printer, value); |
de32c0cb NB |
1195 | break; |
1196 | ||
467cecf3 JB |
1197 | case OPT_fpack_struct_: |
1198 | if (value <= 0 || (value & (value - 1)) || value > 16) | |
c662432e | 1199 | error ("structure alignment must be a small power of two, not %d", value); |
467cecf3 JB |
1200 | else |
1201 | { | |
1202 | initial_max_fld_align = value; | |
1203 | maximum_field_alignment = value * BITS_PER_UNIT; | |
1204 | } | |
1205 | break; | |
1206 | ||
de32c0cb | 1207 | case OPT_fpeel_loops: |
a8a5f53a | 1208 | flag_peel_loops_set = true; |
6ff3a151 NB |
1209 | break; |
1210 | ||
1211 | case OPT_fprofile_arcs: | |
a8a5f53a | 1212 | profile_arc_flag_set = true; |
6ff3a151 NB |
1213 | break; |
1214 | ||
a8a5f53a JH |
1215 | case OPT_fprofile_use: |
1216 | if (!flag_branch_probabilities_set) | |
1217 | flag_branch_probabilities = value; | |
1218 | if (!flag_profile_values_set) | |
1219 | flag_profile_values = value; | |
1220 | if (!flag_unroll_loops_set) | |
1221 | flag_unroll_loops = value; | |
1222 | if (!flag_peel_loops_set) | |
1223 | flag_peel_loops = value; | |
1224 | if (!flag_tracer_set) | |
1225 | flag_tracer = value; | |
1226 | if (!flag_value_profile_transformations_set) | |
1227 | flag_value_profile_transformations = value; | |
1228 | break; | |
1229 | ||
1230 | case OPT_fprofile_generate: | |
1231 | if (!profile_arc_flag_set) | |
1232 | profile_arc_flag = value; | |
1233 | if (!flag_profile_values_set) | |
1234 | flag_profile_values = value; | |
1235 | if (!flag_value_profile_transformations_set) | |
1236 | flag_value_profile_transformations = value; | |
1237 | break; | |
1238 | ||
fca9dc00 | 1239 | case OPT_fprofile_values: |
a8a5f53a | 1240 | flag_profile_values_set = true; |
fca9dc00 ZD |
1241 | break; |
1242 | ||
d7afec4b ND |
1243 | case OPT_fvisibility_: |
1244 | { | |
1245 | if (!strcmp(arg, "default")) | |
1246 | default_visibility = VISIBILITY_DEFAULT; | |
1247 | else if (!strcmp(arg, "internal")) | |
1248 | default_visibility = VISIBILITY_INTERNAL; | |
1249 | else if (!strcmp(arg, "hidden")) | |
1250 | default_visibility = VISIBILITY_HIDDEN; | |
1251 | else if (!strcmp(arg, "protected")) | |
1252 | default_visibility = VISIBILITY_PROTECTED; | |
1253 | else | |
cc9795d4 | 1254 | error ("unrecognized visibility value \"%s\"", arg); |
d7afec4b ND |
1255 | } |
1256 | break; | |
1257 | ||
fca9dc00 | 1258 | case OPT_fvpt: |
6d9901e7 ZD |
1259 | flag_value_profile_transformations_set = true; |
1260 | break; | |
1261 | ||
de32c0cb NB |
1262 | case OPT_frandom_seed: |
1263 | /* The real switch is -fno-random-seed. */ | |
1264 | if (value) | |
1265 | return 0; | |
1266 | flag_random_seed = NULL; | |
1267 | break; | |
1268 | ||
1269 | case OPT_frandom_seed_: | |
1270 | flag_random_seed = arg; | |
1271 | break; | |
1272 | ||
de32c0cb NB |
1273 | case OPT_fsched_verbose_: |
1274 | #ifdef INSN_SCHEDULING | |
1275 | fix_sched_param ("verbose", arg); | |
1276 | break; | |
1277 | #else | |
1278 | return 0; | |
1279 | #endif | |
1280 | ||
569fa502 DN |
1281 | case OPT_fsched_stalled_insns_: |
1282 | flag_sched_stalled_insns = value; | |
1283 | if (flag_sched_stalled_insns == 0) | |
1284 | flag_sched_stalled_insns = -1; | |
1285 | break; | |
1286 | ||
569fa502 DN |
1287 | case OPT_fsched_stalled_insns_dep_: |
1288 | flag_sched_stalled_insns_dep = value; | |
1289 | break; | |
6ff3a151 | 1290 | |
de32c0cb NB |
1291 | case OPT_fstack_limit: |
1292 | /* The real switch is -fno-stack-limit. */ | |
1293 | if (value) | |
1294 | return 0; | |
1295 | stack_limit_rtx = NULL_RTX; | |
1296 | break; | |
1297 | ||
058de654 NB |
1298 | case OPT_fstack_limit_register_: |
1299 | { | |
1300 | int reg = decode_reg_name (arg); | |
1301 | if (reg < 0) | |
1302 | error ("unrecognized register name \"%s\"", arg); | |
1303 | else | |
1304 | stack_limit_rtx = gen_rtx_REG (Pmode, reg); | |
1305 | } | |
1306 | break; | |
1307 | ||
1308 | case OPT_fstack_limit_symbol_: | |
1309 | stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg)); | |
1310 | break; | |
1311 | ||
c866976a LB |
1312 | case OPT_ftree_vectorizer_verbose_: |
1313 | vect_set_verbosity_level (arg); | |
1314 | break; | |
1315 | ||
058de654 NB |
1316 | case OPT_ftls_model_: |
1317 | if (!strcmp (arg, "global-dynamic")) | |
1318 | flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC; | |
1319 | else if (!strcmp (arg, "local-dynamic")) | |
1320 | flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC; | |
1321 | else if (!strcmp (arg, "initial-exec")) | |
1322 | flag_tls_default = TLS_MODEL_INITIAL_EXEC; | |
1323 | else if (!strcmp (arg, "local-exec")) | |
1324 | flag_tls_default = TLS_MODEL_LOCAL_EXEC; | |
1325 | else | |
d4ee4d25 | 1326 | warning (0, "unknown tls-model \"%s\"", arg); |
058de654 NB |
1327 | break; |
1328 | ||
de32c0cb | 1329 | case OPT_ftracer: |
a8a5f53a | 1330 | flag_tracer_set = true; |
6de9cd9a DN |
1331 | break; |
1332 | ||
de32c0cb | 1333 | case OPT_funroll_loops: |
a8a5f53a | 1334 | flag_unroll_loops_set = true; |
6ff3a151 NB |
1335 | break; |
1336 | ||
e01cc6dc | 1337 | case OPT_g: |
df38ffef NB |
1338 | set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg); |
1339 | break; | |
1340 | ||
1341 | case OPT_gcoff: | |
1342 | set_debug_level (SDB_DEBUG, false, arg); | |
1343 | break; | |
1344 | ||
df38ffef NB |
1345 | case OPT_gdwarf_2: |
1346 | set_debug_level (DWARF2_DEBUG, false, arg); | |
1347 | break; | |
1348 | ||
1349 | case OPT_ggdb: | |
1350 | set_debug_level (NO_DEBUG, 2, arg); | |
1351 | break; | |
1352 | ||
1353 | case OPT_gstabs: | |
1354 | case OPT_gstabs_: | |
1355 | set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg); | |
1356 | break; | |
1357 | ||
1358 | case OPT_gvms: | |
1359 | set_debug_level (VMS_DEBUG, false, arg); | |
1360 | break; | |
1361 | ||
1362 | case OPT_gxcoff: | |
1363 | case OPT_gxcoff_: | |
1364 | set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg); | |
e01cc6dc NB |
1365 | break; |
1366 | ||
d185d268 NB |
1367 | case OPT_o: |
1368 | asm_file_name = arg; | |
1369 | break; | |
1370 | ||
d185d268 NB |
1371 | case OPT_pedantic_errors: |
1372 | flag_pedantic_errors = pedantic = 1; | |
1373 | break; | |
1374 | ||
efa1cdf0 ZD |
1375 | case OPT_floop_optimize: |
1376 | case OPT_frerun_loop_opt: | |
1377 | case OPT_fstrength_reduce: | |
c0220ea4 | 1378 | /* These are no-ops, preserved for backward compatibility. */ |
efa1cdf0 ZD |
1379 | break; |
1380 | ||
50431bc4 ZD |
1381 | default: |
1382 | /* If the flag was handled in a standard way, assume the lack of | |
1383 | processing here is intentional. */ | |
0e61db61 NS |
1384 | gcc_assert (cl_options[scode].flag_var); |
1385 | break; | |
d7b42618 NB |
1386 | } |
1387 | ||
1388 | return 1; | |
1389 | } | |
903caebf NB |
1390 | |
1391 | /* Handle --param NAME=VALUE. */ | |
1392 | static void | |
1393 | handle_param (const char *carg) | |
1394 | { | |
1395 | char *equal, *arg; | |
1396 | int value; | |
1397 | ||
1398 | arg = xstrdup (carg); | |
1399 | equal = strchr (arg, '='); | |
1400 | if (!equal) | |
1401 | error ("%s: --param arguments should be of the form NAME=VALUE", arg); | |
1402 | else | |
1403 | { | |
1404 | value = integral_argument (equal + 1); | |
1405 | if (value == -1) | |
9e637a26 | 1406 | error ("invalid --param value %qs", equal + 1); |
903caebf NB |
1407 | else |
1408 | { | |
1409 | *equal = '\0'; | |
1410 | set_param_value (arg, value); | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | free (arg); | |
1415 | } | |
1416 | ||
1417 | /* Handle -W and -Wextra. */ | |
1418 | static void | |
1419 | set_Wextra (int setting) | |
1420 | { | |
1421 | extra_warnings = setting; | |
903caebf NB |
1422 | warn_unused_parameter = (setting && maybe_warn_unused_parameter); |
1423 | ||
1424 | /* We save the value of warn_uninitialized, since if they put | |
1425 | -Wuninitialized on the command line, we need to generate a | |
1426 | warning about not using it without also specifying -O. */ | |
1427 | if (setting == 0) | |
1428 | warn_uninitialized = 0; | |
1429 | else if (warn_uninitialized != 1) | |
1430 | warn_uninitialized = 2; | |
1431 | } | |
1432 | ||
1433 | /* Initialize unused warning flags. */ | |
1434 | void | |
1435 | set_Wunused (int setting) | |
1436 | { | |
1437 | warn_unused_function = setting; | |
1438 | warn_unused_label = setting; | |
1439 | /* Unused function parameter warnings are reported when either | |
1440 | ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified. | |
1441 | Thus, if -Wextra has already been seen, set warn_unused_parameter; | |
1442 | otherwise set maybe_warn_extra_parameter, which will be picked up | |
1443 | by set_Wextra. */ | |
1444 | maybe_warn_unused_parameter = setting; | |
1445 | warn_unused_parameter = (setting && extra_warnings); | |
1446 | warn_unused_variable = setting; | |
1447 | warn_unused_value = setting; | |
1448 | } | |
058de654 NB |
1449 | |
1450 | /* The following routines are useful in setting all the flags that | |
1451 | -ffast-math and -fno-fast-math imply. */ | |
1452 | void | |
1453 | set_fast_math_flags (int set) | |
1454 | { | |
1455 | flag_trapping_math = !set; | |
1456 | flag_unsafe_math_optimizations = set; | |
1457 | flag_finite_math_only = set; | |
db02da79 | 1458 | flag_signed_zeros = !set; |
058de654 NB |
1459 | flag_errno_math = !set; |
1460 | if (set) | |
039c3d42 RS |
1461 | { |
1462 | flag_signaling_nans = 0; | |
1463 | flag_rounding_math = 0; | |
c7463669 | 1464 | flag_cx_limited_range = 1; |
039c3d42 | 1465 | } |
058de654 NB |
1466 | } |
1467 | ||
1468 | /* Return true iff flags are set as if -ffast-math. */ | |
1469 | bool | |
1470 | fast_math_flags_set_p (void) | |
1471 | { | |
1472 | return (!flag_trapping_math | |
1473 | && flag_unsafe_math_optimizations | |
1474 | && flag_finite_math_only | |
db02da79 | 1475 | && !flag_signed_zeros |
058de654 NB |
1476 | && !flag_errno_math); |
1477 | } | |
cf03fd63 | 1478 | |
df38ffef NB |
1479 | /* Handle a debug output -g switch. EXTENDED is true or false to support |
1480 | extended output (2 is special and means "-ggdb" was given). */ | |
1481 | static void | |
1482 | set_debug_level (enum debug_info_type type, int extended, const char *arg) | |
1483 | { | |
1484 | static bool type_explicit; | |
1485 | ||
1486 | use_gnu_debug_info_extensions = extended; | |
1487 | ||
1488 | if (type == NO_DEBUG) | |
1489 | { | |
1490 | if (write_symbols == NO_DEBUG) | |
1491 | { | |
1492 | write_symbols = PREFERRED_DEBUGGING_TYPE; | |
1493 | ||
1494 | if (extended == 2) | |
1495 | { | |
1496 | #ifdef DWARF2_DEBUGGING_INFO | |
1497 | write_symbols = DWARF2_DEBUG; | |
1498 | #elif defined DBX_DEBUGGING_INFO | |
1499 | write_symbols = DBX_DEBUG; | |
1500 | #endif | |
1501 | } | |
1502 | ||
1503 | if (write_symbols == NO_DEBUG) | |
d4ee4d25 | 1504 | warning (0, "target system does not support debug output"); |
df38ffef NB |
1505 | } |
1506 | } | |
1507 | else | |
1508 | { | |
1509 | /* Does it conflict with an already selected type? */ | |
1510 | if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols) | |
1511 | error ("debug format \"%s\" conflicts with prior selection", | |
1512 | debug_type_names[type]); | |
1513 | write_symbols = type; | |
1514 | type_explicit = true; | |
1515 | } | |
1516 | ||
1517 | /* A debug flag without a level defaults to level 2. */ | |
1518 | if (*arg == '\0') | |
1519 | { | |
1520 | if (!debug_info_level) | |
1521 | debug_info_level = 2; | |
1522 | } | |
1523 | else | |
1524 | { | |
1525 | debug_info_level = integral_argument (arg); | |
1526 | if (debug_info_level == (unsigned int) -1) | |
1527 | error ("unrecognised debug output level \"%s\"", arg); | |
1528 | else if (debug_info_level > 3) | |
1529 | error ("debug output level %s is too high", arg); | |
1530 | } | |
1531 | } | |
1532 | ||
75685792 RS |
1533 | /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't |
1534 | a simple on-off switch. */ | |
1535 | ||
1536 | int | |
ccf08a6e | 1537 | option_enabled (int opt_idx) |
75685792 | 1538 | { |
ccf08a6e | 1539 | const struct cl_option *option = &(cl_options[opt_idx]); |
c662432e | 1540 | |
75685792 | 1541 | if (option->flag_var) |
55bea00a | 1542 | switch (option->var_type) |
75685792 RS |
1543 | { |
1544 | case CLVC_BOOLEAN: | |
55bea00a | 1545 | return *(int *) option->flag_var != 0; |
75685792 RS |
1546 | |
1547 | case CLVC_EQUAL: | |
55bea00a | 1548 | return *(int *) option->flag_var == option->var_value; |
75685792 RS |
1549 | |
1550 | case CLVC_BIT_CLEAR: | |
55bea00a | 1551 | return (*(int *) option->flag_var & option->var_value) == 0; |
75685792 RS |
1552 | |
1553 | case CLVC_BIT_SET: | |
55bea00a RS |
1554 | return (*(int *) option->flag_var & option->var_value) != 0; |
1555 | ||
1556 | case CLVC_STRING: | |
1557 | break; | |
75685792 RS |
1558 | } |
1559 | return -1; | |
1560 | } | |
5c60a017 RS |
1561 | |
1562 | /* Fill STATE with the current state of option OPTION. Return true if | |
1563 | there is some state to store. */ | |
1564 | ||
1565 | bool | |
1566 | get_option_state (int option, struct cl_option_state *state) | |
1567 | { | |
1568 | if (cl_options[option].flag_var == 0) | |
1569 | return false; | |
1570 | ||
1571 | switch (cl_options[option].var_type) | |
1572 | { | |
1573 | case CLVC_BOOLEAN: | |
1574 | case CLVC_EQUAL: | |
1575 | state->data = cl_options[option].flag_var; | |
1576 | state->size = sizeof (int); | |
1577 | break; | |
1578 | ||
1579 | case CLVC_BIT_CLEAR: | |
1580 | case CLVC_BIT_SET: | |
1581 | state->ch = option_enabled (option); | |
1582 | state->data = &state->ch; | |
1583 | state->size = 1; | |
1584 | break; | |
1585 | ||
1586 | case CLVC_STRING: | |
1587 | state->data = *(const char **) cl_options[option].flag_var; | |
1588 | if (state->data == 0) | |
1589 | state->data = ""; | |
1590 | state->size = strlen (state->data) + 1; | |
1591 | break; | |
1592 | } | |
1593 | return true; | |
1594 | } | |
dc90f45b MLI |
1595 | |
1596 | /* Enable a warning option as an error. This is used by -Werror= and | |
1597 | also by legacy Werror-implicit-function-declaration. */ | |
1598 | ||
1599 | void | |
1600 | enable_warning_as_error (const char *arg, int value, unsigned int lang_mask) | |
1601 | { | |
1602 | char *new_option; | |
1603 | int option_index; | |
1604 | ||
1605 | new_option = XNEWVEC (char, strlen (arg) + 2); | |
1606 | new_option[0] = 'W'; | |
1607 | strcpy (new_option + 1, arg); | |
1608 | option_index = find_opt (new_option, lang_mask); | |
1609 | if (option_index == N_OPTS) | |
1610 | { | |
1611 | error ("-Werror=%s: No option -%s", arg, new_option); | |
1612 | } | |
1613 | else | |
1614 | { | |
1615 | int kind = value ? DK_ERROR : DK_WARNING; | |
1616 | diagnostic_classify_diagnostic (global_dc, option_index, kind); | |
1617 | ||
1618 | /* -Werror=foo implies -Wfoo. */ | |
1619 | if (cl_options[option_index].var_type == CLVC_BOOLEAN | |
1620 | && cl_options[option_index].flag_var | |
1621 | && kind == DK_ERROR) | |
1622 | *(int *) cl_options[option_index].flag_var = 1; | |
1623 | } | |
1624 | free (new_option); | |
1625 | } |