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Commit | Line | Data |
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2772ef3e NB |
1 | /* Command line option handling. |
2 | Copyright (C) 2002, 2003 Free Software Foundation, Inc. | |
3 | Contributed by Neil Booth. | |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GCC; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "coretypes.h" | |
25 | #include "tm.h" | |
26 | #include "tree.h" | |
058de654 NB |
27 | #include "rtl.h" |
28 | #include "ggc.h" | |
29 | #include "output.h" | |
2772ef3e NB |
30 | #include "langhooks.h" |
31 | #include "opts.h" | |
d7b42618 NB |
32 | #include "options.h" |
33 | #include "flags.h" | |
34 | #include "toplev.h" | |
903caebf | 35 | #include "params.h" |
de32c0cb | 36 | #include "diagnostic.h" |
2772ef3e | 37 | |
d185d268 NB |
38 | /* Value of the -G xx switch, and whether it was passed or not. */ |
39 | unsigned HOST_WIDE_INT g_switch_value; | |
40 | bool g_switch_set; | |
41 | ||
42 | /* True if we should exit after parsing options. */ | |
43 | bool exit_after_options; | |
44 | ||
45 | /* If -version. */ | |
46 | bool version_flag; | |
47 | ||
e01cc6dc NB |
48 | /* Print various extra warnings. -W/-Wextra. */ |
49 | bool extra_warnings; | |
50 | ||
51 | /* Don't print warning messages. -w. */ | |
52 | bool inhibit_warnings; | |
53 | ||
54 | /* Treat warnings as errors. -Werror. */ | |
55 | bool warnings_are_errors; | |
56 | ||
57 | /* Warn if a function returns an aggregate, since there are often | |
58 | incompatible calling conventions for doing this. */ | |
59 | bool warn_aggregate_return; | |
60 | ||
61 | /* Nonzero means warn about pointer casts that increase the required | |
62 | alignment of the target type (and might therefore lead to a crash | |
63 | due to a misaligned access). */ | |
64 | bool warn_cast_align; | |
65 | ||
66 | /* Nonzero means warn about uses of __attribute__((deprecated)) | |
67 | declarations. */ | |
68 | bool warn_deprecated_decl = true; | |
69 | ||
70 | /* Warn when an optimization pass is disabled. */ | |
71 | bool warn_disabled_optimization; | |
72 | ||
73 | /* Nonzero means warn if inline function is too large. */ | |
74 | bool warn_inline; | |
75 | ||
76 | /* True to warn about any objects definitions whose size is larger | |
77 | than N bytes. Also want about function definitions whose returned | |
78 | values are larger than N bytes, where N is `larger_than_size'. */ | |
79 | bool warn_larger_than; | |
80 | HOST_WIDE_INT larger_than_size; | |
81 | ||
82 | /* Warn about functions which might be candidates for attribute noreturn. */ | |
83 | bool warn_missing_noreturn; | |
84 | ||
85 | /* True to warn about code which is never reached. */ | |
86 | bool warn_notreached; | |
87 | ||
88 | /* Warn if packed attribute on struct is unnecessary and inefficient. */ | |
89 | bool warn_packed; | |
90 | ||
91 | /* Warn when gcc pads a structure to an alignment boundary. */ | |
92 | bool warn_padded; | |
93 | ||
94 | /* True means warn about all declarations which shadow others. */ | |
95 | bool warn_shadow; | |
96 | ||
97 | /* Nonzero means warn about constructs which might not be | |
98 | strict-aliasing safe. */ | |
99 | bool warn_strict_aliasing; | |
100 | ||
101 | /* True to warn if a switch on an enum, that does not have a default | |
102 | case, fails to have a case for every enum value. */ | |
103 | bool warn_switch; | |
104 | ||
105 | /* Warn if a switch does not have a default case. */ | |
106 | bool warn_switch_default; | |
107 | ||
108 | /* Warn if a switch on an enum fails to have a case for every enum | |
109 | value (regardless of the presence or otherwise of a default case). */ | |
110 | bool warn_switch_enum; | |
111 | ||
112 | /* Don't suppress warnings from system headers. -Wsystem-headers. */ | |
113 | bool warn_system_headers; | |
114 | ||
115 | /* True to warn about variables used before they are initialized. */ | |
116 | int warn_uninitialized; | |
117 | ||
118 | /* True to warn about unused variables, functions et.al. */ | |
119 | bool warn_unused_function; | |
120 | bool warn_unused_label; | |
121 | bool warn_unused_parameter; | |
122 | bool warn_unused_variable; | |
123 | bool warn_unused_value; | |
124 | ||
903caebf NB |
125 | /* Hack for cooperation between set_Wunused and set_Wextra. */ |
126 | static bool maybe_warn_unused_parameter; | |
127 | ||
35399bdc | 128 | static size_t find_opt (const char *, int); |
d7b42618 | 129 | static int common_handle_option (size_t scode, const char *arg, int value); |
903caebf NB |
130 | static void handle_param (const char *); |
131 | static void set_Wextra (int); | |
2772ef3e NB |
132 | |
133 | /* Perform a binary search to find which option the command-line INPUT | |
9cd23ed2 NB |
134 | matches. Returns its index in the option array, and N_OPTS |
135 | (cl_options_count) on failure. | |
136 | ||
137 | This routine is quite subtle. A normal binary search is not good | |
138 | enough because some options can be suffixed with an argument, and | |
139 | multiple sub-matches can occur, e.g. input of "-pedantic" matching | |
140 | the initial substring of "-pedantic-errors". | |
141 | ||
142 | A more complicated example is -gstabs. It should match "-g" with | |
143 | an argument of "stabs". Suppose, however, that the number and list | |
144 | of switches are such that the binary search tests "-gen-decls" | |
145 | before having tested "-g". This doesn't match, and as "-gen-decls" | |
146 | is less than "-gstabs", it will become the lower bound of the | |
147 | binary search range, and "-g" will never be seen. To resolve this | |
148 | issue, opts.sh makes "-gen-decls" point, via the back_chain member, | |
149 | to "-g" so that failed searches that end between "-gen-decls" and | |
150 | the lexicographically subsequent switch know to go back and see if | |
151 | "-g" causes a match (which it does in this example). | |
152 | ||
153 | This search is done in such a way that the longest match for the | |
154 | front end in question wins. If there is no match for the current | |
155 | front end, the longest match for a different front end is returned | |
156 | (or N_OPTS if none) and the caller emits an error message. */ | |
35399bdc | 157 | static size_t |
2772ef3e NB |
158 | find_opt (const char *input, int lang_mask) |
159 | { | |
9cd23ed2 NB |
160 | size_t mn, mx, md, opt_len; |
161 | size_t match_wrong_lang; | |
2772ef3e NB |
162 | int comp; |
163 | ||
164 | mn = 0; | |
35399bdc | 165 | mx = cl_options_count; |
2772ef3e | 166 | |
9cd23ed2 NB |
167 | /* Find mn such this lexicographical inequality holds: |
168 | cl_options[mn] <= input < cl_options[mn + 1]. */ | |
169 | while (mx - mn > 1) | |
2772ef3e NB |
170 | { |
171 | md = (mn + mx) / 2; | |
2772ef3e NB |
172 | opt_len = cl_options[md].opt_len; |
173 | comp = strncmp (input, cl_options[md].opt_text, opt_len); | |
174 | ||
175 | if (comp < 0) | |
176 | mx = md; | |
2772ef3e | 177 | else |
9cd23ed2 NB |
178 | mn = md; |
179 | } | |
180 | ||
181 | /* This is the switch that is the best match but for a different | |
182 | front end, or cl_options_count if there is no match at all. */ | |
183 | match_wrong_lang = cl_options_count; | |
184 | ||
185 | /* Backtrace the chain of possible matches, returning the longest | |
186 | one, if any, that fits best. With current GCC switches, this | |
187 | loop executes at most twice. */ | |
188 | do | |
189 | { | |
190 | const struct cl_option *opt = &cl_options[mn]; | |
191 | ||
192 | /* Is this switch a prefix of the input? */ | |
193 | if (!strncmp (input, opt->opt_text, opt->opt_len)) | |
2772ef3e | 194 | { |
9cd23ed2 NB |
195 | /* If language is OK, and the match is exact or the switch |
196 | takes a joined argument, return it. */ | |
197 | if ((opt->flags & lang_mask) | |
198 | && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED))) | |
199 | return mn; | |
200 | ||
201 | /* If we haven't remembered a prior match, remember this | |
202 | one. Any prior match is necessarily better. */ | |
203 | if (match_wrong_lang != cl_options_count) | |
204 | match_wrong_lang = mn; | |
2772ef3e | 205 | } |
9cd23ed2 NB |
206 | |
207 | /* Try the next possibility. This is cl_options_count if there | |
208 | are no more. */ | |
209 | mn = opt->back_chain; | |
2772ef3e | 210 | } |
9cd23ed2 | 211 | while (mn != cl_options_count); |
2772ef3e | 212 | |
9cd23ed2 NB |
213 | /* Return the best wrong match, or cl_options_count if none. */ |
214 | return match_wrong_lang; | |
2772ef3e NB |
215 | } |
216 | ||
e01cc6dc | 217 | /* If ARG is a non-negative integer made up solely of digits, return its |
7b086b11 NB |
218 | value, otherwise return -1. */ |
219 | static int | |
220 | integral_argument (const char *arg) | |
221 | { | |
222 | const char *p = arg; | |
223 | ||
224 | while (*p && ISDIGIT (*p)) | |
225 | p++; | |
226 | ||
227 | if (*p == '\0') | |
228 | return atoi (arg); | |
229 | ||
230 | return -1; | |
231 | } | |
232 | ||
2772ef3e NB |
233 | /* Handle the switch beginning at ARGV, with ARGC remaining. */ |
234 | int | |
7fb26bb0 | 235 | handle_option (int argc ATTRIBUTE_UNUSED, char **argv, int lang_mask) |
2772ef3e NB |
236 | { |
237 | size_t opt_index; | |
238 | const char *opt, *arg = 0; | |
239 | char *dup = 0; | |
7b086b11 | 240 | int value = 1; |
058de654 | 241 | int result = 0; |
2772ef3e NB |
242 | const struct cl_option *option; |
243 | ||
2772ef3e NB |
244 | opt = argv[0]; |
245 | ||
246 | /* Interpret "-" or a non-switch as a file name. */ | |
247 | if (opt[0] != '-' || opt[1] == '\0') | |
248 | { | |
35399bdc | 249 | opt_index = cl_options_count; |
2772ef3e | 250 | arg = opt; |
d7b42618 | 251 | main_input_filename = opt; |
7b086b11 | 252 | result = (*lang_hooks.handle_option) (opt_index, arg, value); |
2772ef3e NB |
253 | } |
254 | else | |
255 | { | |
256 | /* Drop the "no-" from negative switches. */ | |
257 | if ((opt[1] == 'W' || opt[1] == 'f') | |
258 | && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-') | |
259 | { | |
260 | size_t len = strlen (opt) - 3; | |
261 | ||
262 | dup = xmalloc (len + 1); | |
263 | dup[0] = '-'; | |
264 | dup[1] = opt[1]; | |
265 | memcpy (dup + 2, opt + 5, len - 2 + 1); | |
266 | opt = dup; | |
7b086b11 | 267 | value = 0; |
2772ef3e NB |
268 | } |
269 | ||
d7b42618 | 270 | opt_index = find_opt (opt + 1, lang_mask | CL_COMMON); |
35399bdc | 271 | if (opt_index == cl_options_count) |
2772ef3e NB |
272 | goto done; |
273 | ||
274 | option = &cl_options[opt_index]; | |
275 | ||
276 | /* Reject negative form of switches that don't take negatives. */ | |
7b086b11 | 277 | if (!value && (option->flags & CL_REJECT_NEGATIVE)) |
2772ef3e NB |
278 | goto done; |
279 | ||
6356f892 | 280 | /* We've recognized this switch. */ |
2772ef3e NB |
281 | result = 1; |
282 | ||
283 | /* Sort out any argument the switch takes. */ | |
7b086b11 | 284 | if (option->flags & CL_JOINED) |
2772ef3e | 285 | { |
7b086b11 NB |
286 | /* Have arg point to the original switch. This is because |
287 | some code, such as disable_builtin_function, expects its | |
288 | argument to be persistent until the program exits. */ | |
289 | arg = argv[0] + cl_options[opt_index].opt_len + 1; | |
290 | if (!value) | |
291 | arg += strlen ("no-"); | |
292 | ||
293 | if (*arg == '\0' && !(option->flags & CL_MISSING_OK)) | |
2772ef3e | 294 | { |
7b086b11 NB |
295 | if (option->flags & CL_SEPARATE) |
296 | { | |
297 | arg = argv[1]; | |
298 | result = 2; | |
299 | } | |
300 | else | |
301 | /* Missing argument. */ | |
302 | arg = NULL; | |
2772ef3e | 303 | } |
7b086b11 NB |
304 | } |
305 | else if (option->flags & CL_SEPARATE) | |
306 | { | |
307 | arg = argv[1]; | |
308 | result = 2; | |
309 | } | |
2772ef3e | 310 | |
7b086b11 NB |
311 | /* If the switch takes an integer, convert it. */ |
312 | if (arg && (option->flags & CL_UINTEGER)) | |
313 | { | |
314 | value = integral_argument (arg); | |
315 | if (value == -1) | |
2772ef3e | 316 | { |
7b086b11 NB |
317 | error ("argument to \"-%s\" should be a non-negative integer", |
318 | option->opt_text); | |
319 | goto done; | |
2772ef3e | 320 | } |
2772ef3e | 321 | } |
2772ef3e | 322 | |
d7b42618 | 323 | if (option->flags & lang_mask) |
058de654 NB |
324 | if ((*lang_hooks.handle_option) (opt_index, arg, value) == 0) |
325 | result = 0; | |
d7b42618 | 326 | |
058de654 NB |
327 | if (result && (option->flags & CL_COMMON)) |
328 | if (common_handle_option (opt_index, arg, value) == 0) | |
329 | result = 0; | |
d7b42618 | 330 | } |
2772ef3e NB |
331 | |
332 | done: | |
333 | if (dup) | |
334 | free (dup); | |
335 | return result; | |
336 | } | |
d7b42618 NB |
337 | |
338 | /* Handle target- and language-independent options. Return zero to | |
339 | generate an "unknown option" message. */ | |
340 | static int | |
341 | common_handle_option (size_t scode, const char *arg, | |
342 | int value ATTRIBUTE_UNUSED) | |
343 | { | |
344 | const struct cl_option *option = &cl_options[scode]; | |
345 | enum opt_code code = (enum opt_code) scode; | |
346 | ||
347 | if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE))) | |
348 | { | |
349 | error ("missing argument to \"-%s\"", option->opt_text); | |
350 | return 1; | |
351 | } | |
352 | ||
353 | switch (code) | |
354 | { | |
355 | default: | |
356 | abort (); | |
357 | ||
d185d268 NB |
358 | case OPT__help: |
359 | display_help (); | |
360 | exit_after_options = true; | |
361 | break; | |
362 | ||
903caebf NB |
363 | case OPT__param: |
364 | handle_param (arg); | |
365 | break; | |
366 | ||
d185d268 NB |
367 | case OPT__target_help: |
368 | display_target_options (); | |
369 | exit_after_options = true; | |
370 | break; | |
371 | ||
372 | case OPT__version: | |
373 | print_version (stderr, ""); | |
374 | exit_after_options = true; | |
375 | break; | |
376 | ||
377 | case OPT_G: | |
7b086b11 | 378 | g_switch_value = value; |
d185d268 NB |
379 | g_switch_set = true; |
380 | break; | |
381 | ||
903caebf NB |
382 | case OPT_O: |
383 | case OPT_Os: | |
384 | /* Currently handled in a prescan. */ | |
385 | break; | |
386 | ||
387 | case OPT_W: | |
388 | /* For backward compatibility, -W is the same as -Wextra. */ | |
389 | set_Wextra (value); | |
390 | break; | |
391 | ||
e01cc6dc NB |
392 | case OPT_Waggregate_return: |
393 | warn_aggregate_return = value; | |
394 | break; | |
395 | ||
396 | case OPT_Wcast_align: | |
397 | warn_cast_align = value; | |
398 | break; | |
399 | ||
400 | case OPT_Wdeprecated_declarations: | |
401 | warn_deprecated_decl = value; | |
402 | ||
403 | case OPT_Wdisabled_optimization: | |
404 | warn_disabled_optimization = value; | |
405 | break; | |
406 | ||
407 | case OPT_Werror: | |
408 | warnings_are_errors = value; | |
409 | break; | |
410 | ||
903caebf NB |
411 | case OPT_Wextra: |
412 | set_Wextra (value); | |
413 | break; | |
414 | ||
e01cc6dc NB |
415 | case OPT_Winline: |
416 | warn_inline = value; | |
417 | break; | |
418 | ||
419 | case OPT_Wlarger_than_: | |
420 | larger_than_size = value; | |
421 | warn_larger_than = value != -1; | |
422 | break; | |
423 | ||
424 | case OPT_Wmissing_noreturn: | |
425 | warn_missing_noreturn = value; | |
426 | break; | |
427 | ||
428 | case OPT_Wpacked: | |
429 | warn_packed = value; | |
430 | break; | |
431 | ||
432 | case OPT_Wpadded: | |
433 | warn_padded = value; | |
434 | break; | |
435 | ||
436 | case OPT_Wshadow: | |
437 | warn_shadow = value; | |
438 | break; | |
439 | ||
440 | case OPT_Wstrict_aliasing: | |
441 | warn_strict_aliasing = value; | |
442 | break; | |
443 | ||
444 | case OPT_Wswitch: | |
445 | warn_switch = value; | |
446 | break; | |
447 | ||
448 | case OPT_Wswitch_default: | |
449 | warn_switch_default = value; | |
450 | break; | |
451 | ||
452 | case OPT_Wswitch_enum: | |
453 | warn_switch_enum = value; | |
454 | break; | |
455 | ||
456 | case OPT_Wsystem_headers: | |
457 | warn_system_headers = value; | |
458 | break; | |
459 | ||
460 | case OPT_Wuninitialized: | |
461 | warn_uninitialized = value; | |
462 | break; | |
463 | ||
464 | case OPT_Wunreachable_code: | |
465 | warn_notreached = value; | |
466 | break; | |
467 | ||
903caebf NB |
468 | case OPT_Wunused: |
469 | set_Wunused (value); | |
470 | break; | |
471 | ||
e01cc6dc NB |
472 | case OPT_Wunused_function: |
473 | warn_unused_function = value; | |
474 | break; | |
475 | ||
476 | case OPT_Wunused_label: | |
477 | warn_unused_label = value; | |
478 | break; | |
479 | ||
480 | case OPT_Wunused_parameter: | |
481 | warn_unused_parameter = value; | |
482 | break; | |
483 | ||
484 | case OPT_Wunused_value: | |
485 | warn_unused_value = value; | |
486 | break; | |
487 | ||
488 | case OPT_Wunused_variable: | |
489 | warn_unused_variable = value; | |
490 | break; | |
491 | ||
d185d268 NB |
492 | case OPT_aux_info: |
493 | case OPT_aux_info_: | |
494 | aux_info_file_name = arg; | |
495 | flag_gen_aux_info = 1; | |
496 | break; | |
497 | ||
498 | case OPT_auxbase: | |
499 | aux_base_name = arg; | |
500 | break; | |
501 | ||
502 | case OPT_auxbase_strip: | |
503 | { | |
504 | char *tmp = xstrdup (arg); | |
505 | strip_off_ending (tmp, strlen (tmp)); | |
506 | if (tmp[0]) | |
507 | aux_base_name = tmp; | |
508 | } | |
509 | break; | |
510 | ||
511 | case OPT_d: | |
512 | decode_d_option (arg); | |
513 | break; | |
514 | ||
515 | case OPT_dumpbase: | |
516 | dump_base_name = arg; | |
517 | break; | |
518 | ||
6ff3a151 NB |
519 | case OPT_fPIC: |
520 | flag_pic = value + value; | |
521 | break; | |
522 | ||
523 | case OPT_fPIE: | |
524 | flag_pie = value + value; | |
525 | break; | |
526 | ||
527 | case OPT_falign_functions: | |
058de654 NB |
528 | case OPT_falign_functions_: |
529 | align_functions = value; | |
530 | break; | |
531 | ||
6ff3a151 | 532 | case OPT_falign_jumps: |
058de654 NB |
533 | case OPT_falign_jumps_: |
534 | align_jumps = value; | |
535 | break; | |
536 | ||
6ff3a151 | 537 | case OPT_falign_labels: |
058de654 NB |
538 | case OPT_falign_labels_: |
539 | align_labels = value; | |
540 | break; | |
541 | ||
6ff3a151 | 542 | case OPT_falign_loops: |
058de654 NB |
543 | case OPT_falign_loops_: |
544 | align_loops = value; | |
545 | break; | |
546 | ||
6ff3a151 NB |
547 | case OPT_fargument_alias: |
548 | flag_argument_noalias = !value; | |
549 | break; | |
550 | ||
551 | case OPT_fargument_noalias: | |
552 | flag_argument_noalias = value; | |
553 | break; | |
554 | ||
555 | case OPT_fargument_noalias_global: | |
556 | flag_argument_noalias = value + value; | |
557 | break; | |
558 | ||
559 | case OPT_fasynchronous_unwind_tables: | |
560 | flag_asynchronous_unwind_tables = value; | |
561 | break; | |
562 | ||
563 | case OPT_fbounds_check: | |
564 | flag_bounds_check = value; | |
565 | break; | |
566 | ||
567 | case OPT_fbranch_count_reg: | |
568 | flag_branch_on_count_reg = value; | |
569 | break; | |
570 | ||
571 | case OPT_fbranch_probabilities: | |
572 | flag_branch_probabilities = value; | |
573 | break; | |
574 | ||
de32c0cb NB |
575 | case OPT_fbranch_target_load_optimize: |
576 | flag_branch_target_load_optimize = value; | |
577 | break; | |
578 | ||
579 | case OPT_fbranch_target_load_optimize2: | |
580 | flag_branch_target_load_optimize2 = value; | |
581 | break; | |
582 | ||
058de654 NB |
583 | case OPT_fcall_used_: |
584 | fix_register (arg, 0, 1); | |
585 | break; | |
586 | ||
587 | case OPT_fcall_saved_: | |
588 | fix_register (arg, 0, 0); | |
589 | break; | |
590 | ||
de32c0cb NB |
591 | case OPT_fcaller_saves: |
592 | flag_caller_saves = value; | |
593 | break; | |
594 | ||
6ff3a151 NB |
595 | case OPT_fcommon: |
596 | flag_no_common = !value; | |
597 | break; | |
598 | ||
599 | case OPT_fcprop_registers: | |
600 | flag_cprop_registers = value; | |
601 | break; | |
602 | ||
de32c0cb NB |
603 | case OPT_fcrossjumping: |
604 | flag_crossjumping = value; | |
605 | break; | |
606 | ||
607 | case OPT_fcse_follow_jumps: | |
608 | flag_cse_follow_jumps = value; | |
609 | break; | |
610 | ||
611 | case OPT_fcse_skip_blocks: | |
612 | flag_cse_skip_blocks = value; | |
613 | break; | |
614 | ||
6ff3a151 NB |
615 | case OPT_fdata_sections: |
616 | flag_data_sections = value; | |
617 | break; | |
618 | ||
de32c0cb NB |
619 | case OPT_fdefer_pop: |
620 | flag_defer_pop = value; | |
621 | break; | |
622 | ||
623 | case OPT_fdelayed_branch: | |
624 | flag_delayed_branch = value; | |
625 | break; | |
626 | ||
627 | case OPT_fdelete_null_pointer_checks: | |
628 | flag_delete_null_pointer_checks = value; | |
629 | break; | |
630 | ||
631 | case OPT_fdiagnostics_show_location_: | |
632 | if (!strcmp (arg, "once")) | |
633 | diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; | |
634 | else if (!strcmp (arg, "every-line")) | |
635 | diagnostic_prefixing_rule (global_dc) | |
636 | = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE; | |
637 | else | |
638 | return 0; | |
639 | break; | |
640 | ||
6ff3a151 NB |
641 | case OPT_fdump_unnumbered: |
642 | flag_dump_unnumbered = value; | |
643 | break; | |
644 | ||
de32c0cb NB |
645 | case OPT_feliminate_dwarf2_dups: |
646 | flag_eliminate_dwarf2_dups = value; | |
647 | break; | |
648 | ||
649 | case OPT_feliminate_unused_debug_types: | |
650 | flag_eliminate_unused_debug_types = value; | |
651 | break; | |
652 | ||
6ff3a151 NB |
653 | case OPT_fexceptions: |
654 | flag_exceptions = value; | |
655 | break; | |
656 | ||
de32c0cb NB |
657 | case OPT_fexpensive_optimizations: |
658 | flag_expensive_optimizations = value; | |
659 | break; | |
660 | ||
058de654 NB |
661 | case OPT_ffast_math: |
662 | set_fast_math_flags (value); | |
663 | break; | |
664 | ||
6ff3a151 NB |
665 | case OPT_ffinite_math_only: |
666 | flag_finite_math_only = value; | |
667 | break; | |
668 | ||
058de654 NB |
669 | case OPT_ffixed_: |
670 | fix_register (arg, 1, 1); | |
671 | break; | |
672 | ||
de32c0cb NB |
673 | case OPT_ffunction_cse: |
674 | flag_no_function_cse = !value; | |
675 | break; | |
676 | ||
677 | case OPT_ffloat_store: | |
678 | flag_float_store = value; | |
679 | break; | |
680 | ||
681 | case OPT_fforce_addr: | |
682 | flag_force_addr = value; | |
683 | break; | |
684 | ||
685 | case OPT_fforce_mem: | |
686 | flag_force_mem = value; | |
687 | break; | |
688 | ||
6ff3a151 NB |
689 | case OPT_ffunction_sections: |
690 | flag_function_sections = value; | |
691 | break; | |
692 | ||
de32c0cb NB |
693 | case OPT_fgcse: |
694 | flag_gcse = value; | |
695 | break; | |
696 | ||
697 | case OPT_fgcse_lm: | |
698 | flag_gcse_lm = value; | |
699 | break; | |
700 | ||
701 | case OPT_fgcse_sm: | |
702 | flag_gcse_sm = value; | |
703 | break; | |
704 | ||
6ff3a151 NB |
705 | case OPT_fgnu_linker: |
706 | flag_gnu_linker = value; | |
707 | break; | |
708 | ||
709 | case OPT_fguess_branch_probability: | |
710 | flag_guess_branch_prob = value; | |
711 | break; | |
712 | ||
713 | case OPT_fident: | |
714 | flag_no_ident = !value; | |
715 | break; | |
716 | ||
de32c0cb NB |
717 | case OPT_fif_conversion: |
718 | flag_if_conversion = value; | |
719 | break; | |
720 | ||
721 | case OPT_fif_conversion2: | |
722 | flag_if_conversion2 = value; | |
723 | break; | |
724 | ||
6ff3a151 NB |
725 | case OPT_finhibit_size_directive: |
726 | flag_inhibit_size_directive = value; | |
727 | break; | |
728 | ||
de32c0cb NB |
729 | case OPT_finline: |
730 | flag_no_inline = !value; | |
731 | break; | |
732 | ||
733 | case OPT_finline_functions: | |
734 | flag_inline_functions = value; | |
735 | break; | |
736 | ||
d302c9d6 NB |
737 | case OPT_finline_limit_: |
738 | case OPT_finline_limit_eq: | |
739 | set_param_value ("max-inline-insns", value); | |
740 | set_param_value ("max-inline-insns-single", value / 2); | |
741 | set_param_value ("max-inline-insns-auto", value / 2); | |
742 | set_param_value ("max-inline-insns-rtl", value); | |
743 | if (value / 4 < MIN_INLINE_INSNS) | |
744 | { | |
745 | if (value / 4 > 10) | |
746 | set_param_value ("min-inline-insns", value / 4); | |
747 | else | |
748 | set_param_value ("min-inline-insns", 10); | |
749 | } | |
750 | break; | |
751 | ||
6ff3a151 NB |
752 | case OPT_finstrument_functions: |
753 | flag_instrument_function_entry_exit = value; | |
754 | break; | |
755 | ||
de32c0cb NB |
756 | case OPT_fkeep_inline_functions: |
757 | flag_keep_inline_functions =value; | |
758 | break; | |
759 | ||
760 | case OPT_fkeep_static_consts: | |
761 | flag_keep_static_consts = value; | |
762 | break; | |
763 | ||
6ff3a151 NB |
764 | case OPT_fleading_underscore: |
765 | flag_leading_underscore = value; | |
766 | break; | |
767 | ||
de32c0cb NB |
768 | case OPT_floop_optimize: |
769 | flag_loop_optimize = value; | |
770 | break; | |
771 | ||
6ff3a151 NB |
772 | case OPT_fmath_errno: |
773 | flag_errno_math = value; | |
774 | break; | |
775 | ||
776 | case OPT_fmem_report: | |
777 | mem_report = value; | |
778 | break; | |
779 | ||
780 | case OPT_fmerge_all_constants: | |
781 | flag_merge_constants = value + value; | |
782 | break; | |
783 | ||
784 | case OPT_fmerge_constants: | |
785 | flag_merge_constants = value; | |
786 | break; | |
787 | ||
de32c0cb NB |
788 | case OPT_fmessage_length_: |
789 | output_set_maximum_length (&global_dc->buffer, value); | |
790 | break; | |
791 | ||
792 | case OPT_fmove_all_movables: | |
793 | flag_move_all_movables = value; | |
794 | break; | |
795 | ||
6ff3a151 NB |
796 | case OPT_fnew_ra: |
797 | flag_new_regalloc = value; | |
798 | break; | |
799 | ||
800 | case OPT_fnon_call_exceptions: | |
801 | flag_non_call_exceptions = value; | |
802 | break; | |
803 | ||
de32c0cb NB |
804 | case OPT_fold_unroll_all_loops: |
805 | flag_old_unroll_all_loops = value; | |
806 | break; | |
807 | ||
808 | case OPT_fold_unroll_loops: | |
809 | flag_old_unroll_loops = value; | |
810 | break; | |
811 | ||
812 | case OPT_fomit_frame_pointer: | |
813 | flag_omit_frame_pointer = value; | |
814 | break; | |
815 | ||
6ff3a151 NB |
816 | case OPT_foptimize_register_move: |
817 | flag_regmove = value; | |
818 | break; | |
819 | ||
de32c0cb NB |
820 | case OPT_foptimize_sibling_calls: |
821 | flag_optimize_sibling_calls = value; | |
822 | break; | |
823 | ||
6ff3a151 NB |
824 | case OPT_fpack_struct: |
825 | flag_pack_struct = value; | |
826 | break; | |
827 | ||
de32c0cb NB |
828 | case OPT_fpeel_loops: |
829 | flag_peel_loops = value; | |
830 | break; | |
831 | ||
832 | case OPT_fpcc_struct_return: | |
833 | flag_pcc_struct_return = value; | |
834 | break; | |
835 | ||
836 | case OPT_fpeephole: | |
837 | flag_no_peephole = !value; | |
838 | break; | |
839 | ||
6ff3a151 NB |
840 | case OPT_fpeephole2: |
841 | flag_peephole2 = value; | |
842 | break; | |
843 | ||
844 | case OPT_fpic: | |
845 | flag_pic = value; | |
846 | break; | |
847 | ||
848 | case OPT_fpie: | |
849 | flag_pie = value; | |
850 | break; | |
851 | ||
de32c0cb NB |
852 | case OPT_fprefetch_loop_arrays: |
853 | flag_prefetch_loop_arrays = value; | |
854 | break; | |
855 | ||
6ff3a151 NB |
856 | case OPT_fprofile: |
857 | profile_flag = value; | |
858 | break; | |
859 | ||
860 | case OPT_fprofile_arcs: | |
861 | profile_arc_flag = value; | |
862 | break; | |
863 | ||
de32c0cb NB |
864 | case OPT_frandom_seed: |
865 | /* The real switch is -fno-random-seed. */ | |
866 | if (value) | |
867 | return 0; | |
868 | flag_random_seed = NULL; | |
869 | break; | |
870 | ||
871 | case OPT_frandom_seed_: | |
872 | flag_random_seed = arg; | |
873 | break; | |
874 | ||
875 | case OPT_freduce_all_givs: | |
876 | flag_reduce_all_givs = value; | |
877 | break; | |
878 | ||
879 | case OPT_freg_struct_return: | |
880 | flag_pcc_struct_return = !value; | |
881 | break; | |
882 | ||
6ff3a151 NB |
883 | case OPT_fregmove: |
884 | flag_regmove = value; | |
885 | break; | |
886 | ||
887 | case OPT_frename_registers: | |
888 | flag_rename_registers = value; | |
889 | break; | |
890 | ||
891 | case OPT_freorder_blocks: | |
892 | flag_reorder_blocks = value; | |
893 | break; | |
894 | ||
895 | case OPT_freorder_functions: | |
896 | flag_reorder_functions = value; | |
897 | break; | |
898 | ||
de32c0cb NB |
899 | case OPT_frerun_cse_after_loop: |
900 | flag_rerun_cse_after_loop = value; | |
901 | break; | |
902 | ||
903 | case OPT_frerun_loop_opt: | |
904 | flag_rerun_loop_opt = value; | |
905 | break; | |
906 | ||
6ff3a151 NB |
907 | case OPT_fsched_interblock: |
908 | flag_schedule_interblock= value; | |
909 | break; | |
910 | ||
911 | case OPT_fsched_spec: | |
912 | flag_schedule_speculative = value; | |
913 | break; | |
914 | ||
915 | case OPT_fsched_spec_load: | |
916 | flag_schedule_speculative_load = value; | |
917 | break; | |
918 | ||
919 | case OPT_fsched_spec_load_dangerous: | |
920 | flag_schedule_speculative_load_dangerous = value; | |
921 | break; | |
922 | ||
de32c0cb NB |
923 | case OPT_fsched_verbose_: |
924 | #ifdef INSN_SCHEDULING | |
925 | fix_sched_param ("verbose", arg); | |
926 | break; | |
927 | #else | |
928 | return 0; | |
929 | #endif | |
930 | ||
6ff3a151 NB |
931 | case OPT_fsched2_use_superblocks: |
932 | flag_sched2_use_superblocks = value; | |
933 | break; | |
934 | ||
935 | case OPT_fsched2_use_traces: | |
936 | flag_sched2_use_traces = value; | |
937 | break; | |
938 | ||
de32c0cb NB |
939 | case OPT_fschedule_insns: |
940 | flag_schedule_insns = value; | |
941 | break; | |
942 | ||
943 | case OPT_fschedule_insns2: | |
944 | flag_schedule_insns_after_reload = value; | |
945 | break; | |
946 | ||
947 | case OPT_fshared_data: | |
948 | flag_shared_data = value; | |
949 | break; | |
950 | ||
6ff3a151 NB |
951 | case OPT_fsignaling_nans: |
952 | flag_signaling_nans = value; | |
953 | break; | |
954 | ||
955 | case OPT_fsingle_precision_constant: | |
956 | flag_single_precision_constant = value; | |
957 | break; | |
958 | ||
959 | case OPT_fssa: | |
960 | flag_ssa = value; | |
961 | break; | |
962 | ||
963 | case OPT_fssa_ccp: | |
964 | flag_ssa_ccp = value; | |
965 | break; | |
966 | ||
967 | case OPT_fssa_dce: | |
968 | flag_ssa_dce = value; | |
969 | break; | |
970 | ||
971 | case OPT_fstack_check: | |
972 | flag_stack_check = value; | |
973 | break; | |
974 | ||
de32c0cb NB |
975 | case OPT_fstack_limit: |
976 | /* The real switch is -fno-stack-limit. */ | |
977 | if (value) | |
978 | return 0; | |
979 | stack_limit_rtx = NULL_RTX; | |
980 | break; | |
981 | ||
058de654 NB |
982 | case OPT_fstack_limit_register_: |
983 | { | |
984 | int reg = decode_reg_name (arg); | |
985 | if (reg < 0) | |
986 | error ("unrecognized register name \"%s\"", arg); | |
987 | else | |
988 | stack_limit_rtx = gen_rtx_REG (Pmode, reg); | |
989 | } | |
990 | break; | |
991 | ||
992 | case OPT_fstack_limit_symbol_: | |
993 | stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg)); | |
994 | break; | |
995 | ||
de32c0cb NB |
996 | case OPT_fstrength_reduce: |
997 | flag_strength_reduce = value; | |
998 | break; | |
999 | ||
6ff3a151 NB |
1000 | case OPT_fstrict_aliasing: |
1001 | flag_strict_aliasing = value; | |
1002 | break; | |
1003 | ||
de32c0cb NB |
1004 | case OPT_fsyntax_only: |
1005 | flag_syntax_only = value; | |
1006 | break; | |
1007 | ||
6ff3a151 NB |
1008 | case OPT_ftest_coverage: |
1009 | flag_test_coverage = value; | |
1010 | break; | |
1011 | ||
de32c0cb NB |
1012 | case OPT_fthread_jumps: |
1013 | flag_thread_jumps = value; | |
1014 | break; | |
1015 | ||
6ff3a151 NB |
1016 | case OPT_ftime_report: |
1017 | time_report = value; | |
1018 | ||
058de654 NB |
1019 | case OPT_ftls_model_: |
1020 | if (!strcmp (arg, "global-dynamic")) | |
1021 | flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC; | |
1022 | else if (!strcmp (arg, "local-dynamic")) | |
1023 | flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC; | |
1024 | else if (!strcmp (arg, "initial-exec")) | |
1025 | flag_tls_default = TLS_MODEL_INITIAL_EXEC; | |
1026 | else if (!strcmp (arg, "local-exec")) | |
1027 | flag_tls_default = TLS_MODEL_LOCAL_EXEC; | |
1028 | else | |
1029 | warning ("unknown tls-model \"%s\"", arg); | |
1030 | break; | |
1031 | ||
de32c0cb NB |
1032 | case OPT_ftracer: |
1033 | flag_tracer = value; | |
1034 | break; | |
1035 | ||
6ff3a151 NB |
1036 | case OPT_ftrapping_math: |
1037 | flag_trapping_math = value; | |
1038 | break; | |
1039 | ||
1040 | case OPT_ftrapv: | |
1041 | flag_trapv = value; | |
1042 | break; | |
1043 | ||
de32c0cb NB |
1044 | case OPT_funit_at_a_time: |
1045 | flag_unit_at_a_time = value; | |
1046 | break; | |
1047 | ||
1048 | case OPT_funroll_all_loops: | |
1049 | flag_unroll_all_loops = value; | |
1050 | break; | |
1051 | ||
1052 | case OPT_funroll_loops: | |
1053 | flag_unroll_loops = value; | |
1054 | break; | |
1055 | ||
6ff3a151 NB |
1056 | case OPT_funsafe_math_optimizations: |
1057 | flag_unsafe_math_optimizations = value; | |
1058 | break; | |
1059 | ||
de32c0cb NB |
1060 | case OPT_funswitch_loops: |
1061 | flag_unswitch_loops = value; | |
1062 | break; | |
1063 | ||
6ff3a151 NB |
1064 | case OPT_funwind_tables: |
1065 | flag_unwind_tables = value; | |
1066 | break; | |
1067 | ||
1068 | case OPT_fverbose_asm: | |
1069 | flag_verbose_asm = value; | |
1070 | break; | |
1071 | ||
1072 | case OPT_fwrapv: | |
1073 | flag_wrapv = value; | |
1074 | break; | |
1075 | ||
de32c0cb NB |
1076 | case OPT_fwritable_strings: |
1077 | flag_writable_strings = value; | |
1078 | break; | |
1079 | ||
6ff3a151 NB |
1080 | case OPT_fzero_initialized_in_bss: |
1081 | flag_zero_initialized_in_bss = value; | |
1082 | break; | |
1083 | ||
e01cc6dc NB |
1084 | case OPT_g: |
1085 | decode_g_option (arg); | |
1086 | break; | |
1087 | ||
903caebf NB |
1088 | case OPT_m: |
1089 | set_target_switch (arg); | |
1090 | break; | |
1091 | ||
d185d268 NB |
1092 | case OPT_o: |
1093 | asm_file_name = arg; | |
1094 | break; | |
1095 | ||
1096 | case OPT_p: | |
1097 | profile_flag = 1; | |
1098 | break; | |
1099 | ||
1100 | case OPT_pedantic: | |
1101 | pedantic = 1; | |
1102 | break; | |
1103 | ||
1104 | case OPT_pedantic_errors: | |
1105 | flag_pedantic_errors = pedantic = 1; | |
1106 | break; | |
1107 | ||
d7b42618 NB |
1108 | case OPT_quiet: |
1109 | quiet_flag = 1; | |
1110 | break; | |
d185d268 NB |
1111 | |
1112 | case OPT_version: | |
1113 | version_flag = 1; | |
1114 | break; | |
1115 | ||
1116 | case OPT_w: | |
e01cc6dc | 1117 | inhibit_warnings = true; |
d185d268 | 1118 | break; |
d7b42618 NB |
1119 | } |
1120 | ||
1121 | return 1; | |
1122 | } | |
903caebf NB |
1123 | |
1124 | /* Handle --param NAME=VALUE. */ | |
1125 | static void | |
1126 | handle_param (const char *carg) | |
1127 | { | |
1128 | char *equal, *arg; | |
1129 | int value; | |
1130 | ||
1131 | arg = xstrdup (carg); | |
1132 | equal = strchr (arg, '='); | |
1133 | if (!equal) | |
1134 | error ("%s: --param arguments should be of the form NAME=VALUE", arg); | |
1135 | else | |
1136 | { | |
1137 | value = integral_argument (equal + 1); | |
1138 | if (value == -1) | |
1139 | error ("invalid --param value `%s'", equal + 1); | |
1140 | else | |
1141 | { | |
1142 | *equal = '\0'; | |
1143 | set_param_value (arg, value); | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | free (arg); | |
1148 | } | |
1149 | ||
1150 | /* Handle -W and -Wextra. */ | |
1151 | static void | |
1152 | set_Wextra (int setting) | |
1153 | { | |
1154 | extra_warnings = setting; | |
1155 | warn_unused_value = setting; | |
1156 | warn_unused_parameter = (setting && maybe_warn_unused_parameter); | |
1157 | ||
1158 | /* We save the value of warn_uninitialized, since if they put | |
1159 | -Wuninitialized on the command line, we need to generate a | |
1160 | warning about not using it without also specifying -O. */ | |
1161 | if (setting == 0) | |
1162 | warn_uninitialized = 0; | |
1163 | else if (warn_uninitialized != 1) | |
1164 | warn_uninitialized = 2; | |
1165 | } | |
1166 | ||
1167 | /* Initialize unused warning flags. */ | |
1168 | void | |
1169 | set_Wunused (int setting) | |
1170 | { | |
1171 | warn_unused_function = setting; | |
1172 | warn_unused_label = setting; | |
1173 | /* Unused function parameter warnings are reported when either | |
1174 | ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified. | |
1175 | Thus, if -Wextra has already been seen, set warn_unused_parameter; | |
1176 | otherwise set maybe_warn_extra_parameter, which will be picked up | |
1177 | by set_Wextra. */ | |
1178 | maybe_warn_unused_parameter = setting; | |
1179 | warn_unused_parameter = (setting && extra_warnings); | |
1180 | warn_unused_variable = setting; | |
1181 | warn_unused_value = setting; | |
1182 | } | |
058de654 NB |
1183 | |
1184 | /* The following routines are useful in setting all the flags that | |
1185 | -ffast-math and -fno-fast-math imply. */ | |
1186 | void | |
1187 | set_fast_math_flags (int set) | |
1188 | { | |
1189 | flag_trapping_math = !set; | |
1190 | flag_unsafe_math_optimizations = set; | |
1191 | flag_finite_math_only = set; | |
1192 | flag_errno_math = !set; | |
1193 | if (set) | |
1194 | flag_signaling_nans = 0; | |
1195 | } | |
1196 | ||
1197 | /* Return true iff flags are set as if -ffast-math. */ | |
1198 | bool | |
1199 | fast_math_flags_set_p (void) | |
1200 | { | |
1201 | return (!flag_trapping_math | |
1202 | && flag_unsafe_math_optimizations | |
1203 | && flag_finite_math_only | |
1204 | && !flag_errno_math); | |
1205 | } |