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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" | |
cf03fd63 | 24 | #include "intl.h" |
2772ef3e NB |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
27 | #include "tree.h" | |
058de654 NB |
28 | #include "rtl.h" |
29 | #include "ggc.h" | |
30 | #include "output.h" | |
2772ef3e NB |
31 | #include "langhooks.h" |
32 | #include "opts.h" | |
d7b42618 NB |
33 | #include "options.h" |
34 | #include "flags.h" | |
35 | #include "toplev.h" | |
903caebf | 36 | #include "params.h" |
de32c0cb | 37 | #include "diagnostic.h" |
9756310a | 38 | #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */ |
d6553b54 | 39 | #include "insn-attr.h" /* For INSN_SCHEDULING. */ |
2772ef3e | 40 | |
d185d268 NB |
41 | /* Value of the -G xx switch, and whether it was passed or not. */ |
42 | unsigned HOST_WIDE_INT g_switch_value; | |
43 | bool g_switch_set; | |
44 | ||
45 | /* True if we should exit after parsing options. */ | |
46 | bool exit_after_options; | |
47 | ||
48 | /* If -version. */ | |
49 | bool version_flag; | |
50 | ||
e01cc6dc NB |
51 | /* Print various extra warnings. -W/-Wextra. */ |
52 | bool extra_warnings; | |
53 | ||
54 | /* Don't print warning messages. -w. */ | |
55 | bool inhibit_warnings; | |
56 | ||
57 | /* Treat warnings as errors. -Werror. */ | |
58 | bool warnings_are_errors; | |
59 | ||
60 | /* Warn if a function returns an aggregate, since there are often | |
61 | incompatible calling conventions for doing this. */ | |
62 | bool warn_aggregate_return; | |
63 | ||
64 | /* Nonzero means warn about pointer casts that increase the required | |
65 | alignment of the target type (and might therefore lead to a crash | |
66 | due to a misaligned access). */ | |
67 | bool warn_cast_align; | |
68 | ||
69 | /* Nonzero means warn about uses of __attribute__((deprecated)) | |
70 | declarations. */ | |
71 | bool warn_deprecated_decl = true; | |
72 | ||
73 | /* Warn when an optimization pass is disabled. */ | |
74 | bool warn_disabled_optimization; | |
75 | ||
76 | /* Nonzero means warn if inline function is too large. */ | |
77 | bool warn_inline; | |
78 | ||
79 | /* True to warn about any objects definitions whose size is larger | |
80 | than N bytes. Also want about function definitions whose returned | |
81 | values are larger than N bytes, where N is `larger_than_size'. */ | |
82 | bool warn_larger_than; | |
83 | HOST_WIDE_INT larger_than_size; | |
84 | ||
85 | /* Warn about functions which might be candidates for attribute noreturn. */ | |
86 | bool warn_missing_noreturn; | |
87 | ||
88 | /* True to warn about code which is never reached. */ | |
89 | bool warn_notreached; | |
90 | ||
91 | /* Warn if packed attribute on struct is unnecessary and inefficient. */ | |
92 | bool warn_packed; | |
93 | ||
94 | /* Warn when gcc pads a structure to an alignment boundary. */ | |
95 | bool warn_padded; | |
96 | ||
97 | /* True means warn about all declarations which shadow others. */ | |
98 | bool warn_shadow; | |
99 | ||
100 | /* Nonzero means warn about constructs which might not be | |
101 | strict-aliasing safe. */ | |
102 | bool warn_strict_aliasing; | |
103 | ||
104 | /* True to warn if a switch on an enum, that does not have a default | |
105 | case, fails to have a case for every enum value. */ | |
106 | bool warn_switch; | |
107 | ||
108 | /* Warn if a switch does not have a default case. */ | |
109 | bool warn_switch_default; | |
110 | ||
111 | /* Warn if a switch on an enum fails to have a case for every enum | |
112 | value (regardless of the presence or otherwise of a default case). */ | |
113 | bool warn_switch_enum; | |
114 | ||
115 | /* Don't suppress warnings from system headers. -Wsystem-headers. */ | |
116 | bool warn_system_headers; | |
117 | ||
118 | /* True to warn about variables used before they are initialized. */ | |
119 | int warn_uninitialized; | |
120 | ||
121 | /* True to warn about unused variables, functions et.al. */ | |
122 | bool warn_unused_function; | |
123 | bool warn_unused_label; | |
124 | bool warn_unused_parameter; | |
125 | bool warn_unused_variable; | |
126 | bool warn_unused_value; | |
127 | ||
903caebf NB |
128 | /* Hack for cooperation between set_Wunused and set_Wextra. */ |
129 | static bool maybe_warn_unused_parameter; | |
130 | ||
df38ffef NB |
131 | /* Type(s) of debugging information we are producing (if any). See |
132 | flags.h for the definitions of the different possible types of | |
133 | debugging information. */ | |
134 | enum debug_info_type write_symbols = NO_DEBUG; | |
135 | ||
136 | /* Level of debugging information we are producing. See flags.h for | |
137 | the definitions of the different possible levels. */ | |
138 | enum debug_info_level debug_info_level = DINFO_LEVEL_NONE; | |
139 | ||
140 | /* Nonzero means use GNU-only extensions in the generated symbolic | |
141 | debugging information. Currently, this only has an effect when | |
142 | write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */ | |
143 | bool use_gnu_debug_info_extensions; | |
144 | ||
2cc98056 NB |
145 | /* Columns of --help display. */ |
146 | static unsigned int columns = 80; | |
147 | ||
148 | /* What to print when a switch has no documentation. */ | |
149 | static const char undocumented_msg[] = N_("This switch lacks documentation"); | |
150 | ||
59e4e217 | 151 | /* Input file names. */ |
40e941af PB |
152 | const char **in_fnames; |
153 | unsigned num_in_fnames; | |
154 | ||
35399bdc | 155 | static size_t find_opt (const char *, int); |
d7b42618 | 156 | static int common_handle_option (size_t scode, const char *arg, int value); |
903caebf NB |
157 | static void handle_param (const char *); |
158 | static void set_Wextra (int); | |
b86f6cd9 | 159 | static unsigned int handle_option (const char **argv, unsigned int lang_mask); |
f18754d6 NB |
160 | static char *write_langs (unsigned int lang_mask); |
161 | static void complain_wrong_lang (const char *, const struct cl_option *, | |
162 | unsigned int lang_mask); | |
b86f6cd9 | 163 | static void handle_options (unsigned int, const char **, unsigned int); |
2cc98056 | 164 | static void wrap_help (const char *help, const char *item, unsigned int); |
cf03fd63 | 165 | static void print_help (void); |
2cc98056 | 166 | static void print_param_help (void); |
72de27ea | 167 | static void print_filtered_help (unsigned int flag); |
2cc98056 | 168 | static unsigned int print_switch (const char *text, unsigned int indent); |
df38ffef NB |
169 | static void set_debug_level (enum debug_info_type type, int extended, |
170 | const char *arg); | |
2772ef3e NB |
171 | |
172 | /* Perform a binary search to find which option the command-line INPUT | |
9cd23ed2 NB |
173 | matches. Returns its index in the option array, and N_OPTS |
174 | (cl_options_count) on failure. | |
175 | ||
176 | This routine is quite subtle. A normal binary search is not good | |
177 | enough because some options can be suffixed with an argument, and | |
178 | multiple sub-matches can occur, e.g. input of "-pedantic" matching | |
179 | the initial substring of "-pedantic-errors". | |
180 | ||
181 | A more complicated example is -gstabs. It should match "-g" with | |
182 | an argument of "stabs". Suppose, however, that the number and list | |
183 | of switches are such that the binary search tests "-gen-decls" | |
184 | before having tested "-g". This doesn't match, and as "-gen-decls" | |
185 | is less than "-gstabs", it will become the lower bound of the | |
186 | binary search range, and "-g" will never be seen. To resolve this | |
187 | issue, opts.sh makes "-gen-decls" point, via the back_chain member, | |
188 | to "-g" so that failed searches that end between "-gen-decls" and | |
189 | the lexicographically subsequent switch know to go back and see if | |
190 | "-g" causes a match (which it does in this example). | |
191 | ||
192 | This search is done in such a way that the longest match for the | |
193 | front end in question wins. If there is no match for the current | |
194 | front end, the longest match for a different front end is returned | |
195 | (or N_OPTS if none) and the caller emits an error message. */ | |
35399bdc | 196 | static size_t |
2772ef3e NB |
197 | find_opt (const char *input, int lang_mask) |
198 | { | |
9cd23ed2 NB |
199 | size_t mn, mx, md, opt_len; |
200 | size_t match_wrong_lang; | |
2772ef3e NB |
201 | int comp; |
202 | ||
203 | mn = 0; | |
35399bdc | 204 | mx = cl_options_count; |
2772ef3e | 205 | |
9cd23ed2 NB |
206 | /* Find mn such this lexicographical inequality holds: |
207 | cl_options[mn] <= input < cl_options[mn + 1]. */ | |
208 | while (mx - mn > 1) | |
2772ef3e NB |
209 | { |
210 | md = (mn + mx) / 2; | |
2772ef3e | 211 | opt_len = cl_options[md].opt_len; |
cf03fd63 | 212 | comp = strncmp (input, cl_options[md].opt_text + 1, opt_len); |
2772ef3e NB |
213 | |
214 | if (comp < 0) | |
215 | mx = md; | |
2772ef3e | 216 | else |
9cd23ed2 NB |
217 | mn = md; |
218 | } | |
219 | ||
220 | /* This is the switch that is the best match but for a different | |
221 | front end, or cl_options_count if there is no match at all. */ | |
222 | match_wrong_lang = cl_options_count; | |
223 | ||
224 | /* Backtrace the chain of possible matches, returning the longest | |
225 | one, if any, that fits best. With current GCC switches, this | |
226 | loop executes at most twice. */ | |
227 | do | |
228 | { | |
229 | const struct cl_option *opt = &cl_options[mn]; | |
230 | ||
231 | /* Is this switch a prefix of the input? */ | |
cf03fd63 | 232 | if (!strncmp (input, opt->opt_text + 1, opt->opt_len)) |
2772ef3e | 233 | { |
9cd23ed2 NB |
234 | /* If language is OK, and the match is exact or the switch |
235 | takes a joined argument, return it. */ | |
236 | if ((opt->flags & lang_mask) | |
237 | && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED))) | |
238 | return mn; | |
239 | ||
240 | /* If we haven't remembered a prior match, remember this | |
241 | one. Any prior match is necessarily better. */ | |
f18754d6 | 242 | if (match_wrong_lang == cl_options_count) |
9cd23ed2 | 243 | match_wrong_lang = mn; |
2772ef3e | 244 | } |
9cd23ed2 NB |
245 | |
246 | /* Try the next possibility. This is cl_options_count if there | |
247 | are no more. */ | |
248 | mn = opt->back_chain; | |
2772ef3e | 249 | } |
9cd23ed2 | 250 | while (mn != cl_options_count); |
2772ef3e | 251 | |
9cd23ed2 NB |
252 | /* Return the best wrong match, or cl_options_count if none. */ |
253 | return match_wrong_lang; | |
2772ef3e NB |
254 | } |
255 | ||
e01cc6dc | 256 | /* If ARG is a non-negative integer made up solely of digits, return its |
7b086b11 NB |
257 | value, otherwise return -1. */ |
258 | static int | |
259 | integral_argument (const char *arg) | |
260 | { | |
261 | const char *p = arg; | |
262 | ||
263 | while (*p && ISDIGIT (*p)) | |
264 | p++; | |
265 | ||
266 | if (*p == '\0') | |
267 | return atoi (arg); | |
268 | ||
269 | return -1; | |
270 | } | |
271 | ||
f18754d6 NB |
272 | /* Return a malloced slash-separated list of languages in MASK. */ |
273 | static char * | |
274 | write_langs (unsigned int mask) | |
275 | { | |
276 | unsigned int n = 0, len = 0; | |
277 | const char *lang_name; | |
278 | char *result; | |
279 | ||
280 | for (n = 0; (lang_name = lang_names[n]) != 0; n++) | |
281 | if (mask & (1U << n)) | |
282 | len += strlen (lang_name) + 1; | |
283 | ||
284 | result = xmalloc (len); | |
285 | len = 0; | |
286 | for (n = 0; (lang_name = lang_names[n]) != 0; n++) | |
287 | if (mask & (1U << n)) | |
288 | { | |
289 | if (len) | |
290 | result[len++] = '/'; | |
291 | strcpy (result + len, lang_name); | |
292 | len += strlen (lang_name); | |
293 | } | |
294 | ||
295 | result[len] = 0; | |
296 | ||
297 | return result; | |
298 | } | |
299 | ||
300 | /* Complain that switch OPT_INDEX does not apply to this front end. */ | |
301 | static void | |
302 | complain_wrong_lang (const char *text, const struct cl_option *option, | |
303 | unsigned int lang_mask) | |
304 | { | |
305 | char *ok_langs, *bad_lang; | |
306 | ||
307 | ok_langs = write_langs (option->flags); | |
308 | bad_lang = write_langs (lang_mask); | |
309 | ||
310 | /* Eventually this should become a hard error IMO. */ | |
311 | warning ("command line option \"%s\" is valid for %s but not for %s", | |
312 | text, ok_langs, bad_lang); | |
313 | ||
314 | free (ok_langs); | |
315 | free (bad_lang); | |
316 | } | |
317 | ||
318 | /* Handle the switch beginning at ARGV for the language indicated by | |
319 | LANG_MASK. Returns the number of switches consumed. */ | |
320 | static unsigned int | |
b86f6cd9 | 321 | handle_option (const char **argv, unsigned int lang_mask) |
2772ef3e NB |
322 | { |
323 | size_t opt_index; | |
324 | const char *opt, *arg = 0; | |
325 | char *dup = 0; | |
7b086b11 | 326 | int value = 1; |
f18754d6 | 327 | unsigned int result = 0; |
2772ef3e NB |
328 | const struct cl_option *option; |
329 | ||
2772ef3e NB |
330 | opt = argv[0]; |
331 | ||
cb66e385 NB |
332 | /* Drop the "no-" from negative switches. */ |
333 | if ((opt[1] == 'W' || opt[1] == 'f') | |
334 | && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-') | |
2772ef3e | 335 | { |
cb66e385 NB |
336 | size_t len = strlen (opt) - 3; |
337 | ||
338 | dup = xmalloc (len + 1); | |
339 | dup[0] = '-'; | |
340 | dup[1] = opt[1]; | |
341 | memcpy (dup + 2, opt + 5, len - 2 + 1); | |
342 | opt = dup; | |
343 | value = 0; | |
2772ef3e | 344 | } |
2772ef3e | 345 | |
cb66e385 NB |
346 | opt_index = find_opt (opt + 1, lang_mask | CL_COMMON); |
347 | if (opt_index == cl_options_count) | |
348 | goto done; | |
2772ef3e | 349 | |
cb66e385 | 350 | option = &cl_options[opt_index]; |
2772ef3e | 351 | |
cb66e385 NB |
352 | /* Reject negative form of switches that don't take negatives as |
353 | unrecognized. */ | |
354 | if (!value && (option->flags & CL_REJECT_NEGATIVE)) | |
355 | goto done; | |
2772ef3e | 356 | |
cb66e385 NB |
357 | /* We've recognized this switch. */ |
358 | result = 1; | |
2772ef3e | 359 | |
cb66e385 NB |
360 | /* Sort out any argument the switch takes. */ |
361 | if (option->flags & CL_JOINED) | |
362 | { | |
363 | /* Have arg point to the original switch. This is because | |
364 | some code, such as disable_builtin_function, expects its | |
365 | argument to be persistent until the program exits. */ | |
366 | arg = argv[0] + cl_options[opt_index].opt_len + 1; | |
367 | if (!value) | |
368 | arg += strlen ("no-"); | |
369 | ||
370 | if (*arg == '\0' && !(option->flags & CL_MISSING_OK)) | |
2772ef3e | 371 | { |
cb66e385 | 372 | if (option->flags & CL_SEPARATE) |
2772ef3e | 373 | { |
cb66e385 NB |
374 | arg = argv[1]; |
375 | result = 2; | |
2772ef3e | 376 | } |
cb66e385 NB |
377 | else |
378 | /* Missing argument. */ | |
379 | arg = NULL; | |
7b086b11 | 380 | } |
cb66e385 NB |
381 | } |
382 | else if (option->flags & CL_SEPARATE) | |
383 | { | |
384 | arg = argv[1]; | |
385 | result = 2; | |
386 | } | |
2772ef3e | 387 | |
cb66e385 NB |
388 | /* Now we've swallowed any potential argument, complain if this |
389 | is a switch for a different front end. */ | |
390 | if (!(option->flags & (lang_mask | CL_COMMON))) | |
391 | { | |
392 | complain_wrong_lang (argv[0], option, lang_mask); | |
393 | goto done; | |
394 | } | |
f18754d6 | 395 | |
cb66e385 NB |
396 | if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE))) |
397 | { | |
398 | if (!(*lang_hooks.missing_argument) (opt, opt_index)) | |
399 | error ("missing argument to \"%s\"", opt); | |
400 | goto done; | |
401 | } | |
9eee5e72 | 402 | |
cb66e385 NB |
403 | /* If the switch takes an integer, convert it. */ |
404 | if (arg && (option->flags & CL_UINTEGER)) | |
405 | { | |
406 | value = integral_argument (arg); | |
407 | if (value == -1) | |
7b086b11 | 408 | { |
cf03fd63 | 409 | error ("argument to \"%s\" should be a non-negative integer", |
cb66e385 NB |
410 | option->opt_text); |
411 | goto done; | |
2772ef3e | 412 | } |
cb66e385 | 413 | } |
2772ef3e | 414 | |
cb66e385 NB |
415 | if (option->flags & lang_mask) |
416 | if ((*lang_hooks.handle_option) (opt_index, arg, value) == 0) | |
417 | result = 0; | |
d7b42618 | 418 | |
cb66e385 NB |
419 | if (result && (option->flags & CL_COMMON)) |
420 | if (common_handle_option (opt_index, arg, value) == 0) | |
421 | result = 0; | |
2772ef3e NB |
422 | |
423 | done: | |
424 | if (dup) | |
425 | free (dup); | |
426 | return result; | |
427 | } | |
d7b42618 | 428 | |
f18754d6 NB |
429 | /* Decode and handle the vector of command line options. LANG_MASK |
430 | contains has a single bit set representing the current | |
431 | language. */ | |
9756310a | 432 | static void |
b86f6cd9 | 433 | handle_options (unsigned int argc, const char **argv, unsigned int lang_mask) |
f18754d6 NB |
434 | { |
435 | unsigned int n, i; | |
436 | ||
437 | for (i = 1; i < argc; i += n) | |
438 | { | |
cb66e385 NB |
439 | const char *opt = argv[i]; |
440 | ||
441 | /* Interpret "-" or a non-switch as a file name. */ | |
442 | if (opt[0] != '-' || opt[1] == '\0') | |
443 | { | |
444 | main_input_filename = opt; | |
40e941af | 445 | add_input_filename (opt); |
cb66e385 NB |
446 | n = 1; |
447 | continue; | |
448 | } | |
449 | ||
f18754d6 NB |
450 | n = handle_option (argv + i, lang_mask); |
451 | ||
452 | if (!n) | |
453 | { | |
454 | n = 1; | |
cb66e385 | 455 | error ("unrecognized command line option \"%s\"", opt); |
f18754d6 NB |
456 | } |
457 | } | |
458 | } | |
459 | ||
40e941af PB |
460 | /* Handle FILENAME from the command line. */ |
461 | void | |
462 | add_input_filename (const char *filename) | |
463 | { | |
464 | num_in_fnames++; | |
465 | in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0])); | |
466 | in_fnames[num_in_fnames - 1] = filename; | |
467 | } | |
468 | ||
9756310a NB |
469 | /* Parse command line options and set default flag values. Do minimal |
470 | options processing. */ | |
471 | void | |
b86f6cd9 | 472 | decode_options (unsigned int argc, const char **argv) |
9756310a | 473 | { |
b86f6cd9 | 474 | unsigned int i, lang_mask; |
9756310a NB |
475 | |
476 | /* Perform language-specific options initialization. */ | |
b86f6cd9 | 477 | lang_mask = (*lang_hooks.init_options) (argc, argv); |
9756310a | 478 | |
21ecc5a7 GDR |
479 | lang_hooks.initialize_diagnostics (global_dc); |
480 | ||
9756310a NB |
481 | /* Scan to see what optimization level has been specified. That will |
482 | determine the default value of many flags. */ | |
483 | for (i = 1; i < argc; i++) | |
484 | { | |
485 | if (!strcmp (argv[i], "-O")) | |
486 | { | |
487 | optimize = 1; | |
488 | optimize_size = 0; | |
489 | } | |
490 | else if (argv[i][0] == '-' && argv[i][1] == 'O') | |
491 | { | |
492 | /* Handle -Os, -O2, -O3, -O69, ... */ | |
b86f6cd9 | 493 | const char *p = &argv[i][2]; |
9756310a NB |
494 | |
495 | if ((p[0] == 's') && (p[1] == 0)) | |
496 | { | |
497 | optimize_size = 1; | |
498 | ||
499 | /* Optimizing for size forces optimize to be 2. */ | |
500 | optimize = 2; | |
501 | } | |
502 | else | |
503 | { | |
504 | const int optimize_val = read_integral_parameter (p, p - 2, -1); | |
505 | if (optimize_val != -1) | |
506 | { | |
507 | optimize = optimize_val; | |
508 | optimize_size = 0; | |
509 | } | |
510 | } | |
511 | } | |
512 | } | |
513 | ||
514 | if (!optimize) | |
515 | { | |
516 | flag_merge_constants = 0; | |
517 | } | |
518 | ||
519 | if (optimize >= 1) | |
520 | { | |
521 | flag_defer_pop = 1; | |
522 | flag_thread_jumps = 1; | |
523 | #ifdef DELAY_SLOTS | |
524 | flag_delayed_branch = 1; | |
525 | #endif | |
526 | #ifdef CAN_DEBUG_WITHOUT_FP | |
527 | flag_omit_frame_pointer = 1; | |
528 | #endif | |
529 | flag_guess_branch_prob = 1; | |
530 | flag_cprop_registers = 1; | |
531 | flag_loop_optimize = 1; | |
532 | flag_crossjumping = 1; | |
533 | flag_if_conversion = 1; | |
534 | flag_if_conversion2 = 1; | |
535 | } | |
536 | ||
537 | if (optimize >= 2) | |
538 | { | |
539 | flag_optimize_sibling_calls = 1; | |
540 | flag_cse_follow_jumps = 1; | |
541 | flag_cse_skip_blocks = 1; | |
542 | flag_gcse = 1; | |
543 | flag_expensive_optimizations = 1; | |
544 | flag_strength_reduce = 1; | |
545 | flag_rerun_cse_after_loop = 1; | |
546 | flag_rerun_loop_opt = 1; | |
547 | flag_caller_saves = 1; | |
548 | flag_force_mem = 1; | |
549 | flag_peephole2 = 1; | |
550 | #ifdef INSN_SCHEDULING | |
551 | flag_schedule_insns = 1; | |
552 | flag_schedule_insns_after_reload = 1; | |
553 | #endif | |
554 | flag_regmove = 1; | |
555 | flag_strict_aliasing = 1; | |
556 | flag_delete_null_pointer_checks = 1; | |
557 | flag_reorder_blocks = 1; | |
558 | flag_reorder_functions = 1; | |
1f95c733 | 559 | flag_unit_at_a_time = 1; |
9756310a NB |
560 | } |
561 | ||
562 | if (optimize >= 3) | |
563 | { | |
564 | flag_inline_functions = 1; | |
565 | flag_rename_registers = 1; | |
566 | flag_unswitch_loops = 1; | |
62551c66 | 567 | flag_web = 1; |
9756310a NB |
568 | } |
569 | ||
570 | if (optimize < 2 || optimize_size) | |
571 | { | |
572 | align_loops = 1; | |
573 | align_jumps = 1; | |
574 | align_labels = 1; | |
575 | align_functions = 1; | |
576 | ||
577 | /* Don't reorder blocks when optimizing for size because extra | |
578 | jump insns may be created; also barrier may create extra padding. | |
579 | ||
580 | More correctly we should have a block reordering mode that tried | |
581 | to minimize the combined size of all the jumps. This would more | |
582 | or less automatically remove extra jumps, but would also try to | |
583 | use more short jumps instead of long jumps. */ | |
584 | flag_reorder_blocks = 0; | |
585 | } | |
586 | ||
587 | /* Initialize whether `char' is signed. */ | |
588 | flag_signed_char = DEFAULT_SIGNED_CHAR; | |
589 | #ifdef DEFAULT_SHORT_ENUMS | |
590 | /* Initialize how much space enums occupy, by default. */ | |
591 | flag_short_enums = DEFAULT_SHORT_ENUMS; | |
592 | #endif | |
593 | ||
594 | /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can | |
595 | modify it. */ | |
596 | target_flags = 0; | |
597 | set_target_switch (""); | |
598 | ||
599 | /* Unwind tables are always present in an ABI-conformant IA-64 | |
600 | object file, so the default should be ON. */ | |
601 | #ifdef IA64_UNWIND_INFO | |
602 | flag_unwind_tables = IA64_UNWIND_INFO; | |
603 | #endif | |
604 | ||
605 | #ifdef OPTIMIZATION_OPTIONS | |
606 | /* Allow default optimizations to be specified on a per-machine basis. */ | |
607 | OPTIMIZATION_OPTIONS (optimize, optimize_size); | |
608 | #endif | |
609 | ||
610 | handle_options (argc, argv, lang_mask); | |
611 | ||
612 | if (flag_pie) | |
613 | flag_pic = flag_pie; | |
614 | if (flag_pic && !flag_pie) | |
615 | flag_shlib = 1; | |
616 | ||
617 | if (flag_no_inline == 2) | |
618 | flag_no_inline = 0; | |
619 | else | |
620 | flag_really_no_inline = flag_no_inline; | |
621 | ||
622 | /* Set flag_no_inline before the post_options () hook. The C front | |
623 | ends use it to determine tree inlining defaults. FIXME: such | |
624 | code should be lang-independent when all front ends use tree | |
625 | inlining, in which case it, and this condition, should be moved | |
626 | to the top of process_options() instead. */ | |
627 | if (optimize == 0) | |
628 | { | |
629 | /* Inlining does not work if not optimizing, | |
630 | so force it not to be done. */ | |
631 | flag_no_inline = 1; | |
632 | warn_inline = 0; | |
633 | ||
634 | /* The c_decode_option function and decode_option hook set | |
635 | this to `2' if -Wall is used, so we can avoid giving out | |
636 | lots of errors for people who don't realize what -Wall does. */ | |
637 | if (warn_uninitialized == 1) | |
638 | warning ("-Wuninitialized is not supported without -O"); | |
639 | } | |
640 | ||
641 | if (flag_really_no_inline == 2) | |
642 | flag_really_no_inline = flag_no_inline; | |
643 | } | |
644 | ||
d7b42618 NB |
645 | /* Handle target- and language-independent options. Return zero to |
646 | generate an "unknown option" message. */ | |
647 | static int | |
648 | common_handle_option (size_t scode, const char *arg, | |
649 | int value ATTRIBUTE_UNUSED) | |
650 | { | |
d7b42618 NB |
651 | enum opt_code code = (enum opt_code) scode; |
652 | ||
d7b42618 NB |
653 | switch (code) |
654 | { | |
655 | default: | |
656 | abort (); | |
657 | ||
d185d268 | 658 | case OPT__help: |
cf03fd63 | 659 | print_help (); |
d185d268 NB |
660 | exit_after_options = true; |
661 | break; | |
662 | ||
903caebf NB |
663 | case OPT__param: |
664 | handle_param (arg); | |
665 | break; | |
666 | ||
d185d268 NB |
667 | case OPT__target_help: |
668 | display_target_options (); | |
669 | exit_after_options = true; | |
670 | break; | |
671 | ||
672 | case OPT__version: | |
673 | print_version (stderr, ""); | |
674 | exit_after_options = true; | |
675 | break; | |
676 | ||
677 | case OPT_G: | |
7b086b11 | 678 | g_switch_value = value; |
d185d268 NB |
679 | g_switch_set = true; |
680 | break; | |
681 | ||
903caebf NB |
682 | case OPT_O: |
683 | case OPT_Os: | |
684 | /* Currently handled in a prescan. */ | |
685 | break; | |
686 | ||
687 | case OPT_W: | |
688 | /* For backward compatibility, -W is the same as -Wextra. */ | |
689 | set_Wextra (value); | |
690 | break; | |
691 | ||
e01cc6dc NB |
692 | case OPT_Waggregate_return: |
693 | warn_aggregate_return = value; | |
694 | break; | |
695 | ||
696 | case OPT_Wcast_align: | |
697 | warn_cast_align = value; | |
698 | break; | |
699 | ||
700 | case OPT_Wdeprecated_declarations: | |
701 | warn_deprecated_decl = value; | |
0bd95603 | 702 | break; |
e01cc6dc NB |
703 | |
704 | case OPT_Wdisabled_optimization: | |
705 | warn_disabled_optimization = value; | |
706 | break; | |
707 | ||
708 | case OPT_Werror: | |
709 | warnings_are_errors = value; | |
710 | break; | |
711 | ||
903caebf NB |
712 | case OPT_Wextra: |
713 | set_Wextra (value); | |
714 | break; | |
715 | ||
e01cc6dc NB |
716 | case OPT_Winline: |
717 | warn_inline = value; | |
718 | break; | |
719 | ||
720 | case OPT_Wlarger_than_: | |
721 | larger_than_size = value; | |
722 | warn_larger_than = value != -1; | |
723 | break; | |
724 | ||
725 | case OPT_Wmissing_noreturn: | |
726 | warn_missing_noreturn = value; | |
727 | break; | |
728 | ||
729 | case OPT_Wpacked: | |
730 | warn_packed = value; | |
731 | break; | |
732 | ||
733 | case OPT_Wpadded: | |
734 | warn_padded = value; | |
735 | break; | |
736 | ||
737 | case OPT_Wshadow: | |
738 | warn_shadow = value; | |
739 | break; | |
740 | ||
741 | case OPT_Wstrict_aliasing: | |
742 | warn_strict_aliasing = value; | |
743 | break; | |
744 | ||
745 | case OPT_Wswitch: | |
746 | warn_switch = value; | |
747 | break; | |
748 | ||
749 | case OPT_Wswitch_default: | |
750 | warn_switch_default = value; | |
751 | break; | |
752 | ||
753 | case OPT_Wswitch_enum: | |
754 | warn_switch_enum = value; | |
755 | break; | |
756 | ||
757 | case OPT_Wsystem_headers: | |
758 | warn_system_headers = value; | |
759 | break; | |
760 | ||
761 | case OPT_Wuninitialized: | |
762 | warn_uninitialized = value; | |
763 | break; | |
764 | ||
765 | case OPT_Wunreachable_code: | |
766 | warn_notreached = value; | |
767 | break; | |
768 | ||
903caebf NB |
769 | case OPT_Wunused: |
770 | set_Wunused (value); | |
771 | break; | |
772 | ||
e01cc6dc NB |
773 | case OPT_Wunused_function: |
774 | warn_unused_function = value; | |
775 | break; | |
776 | ||
777 | case OPT_Wunused_label: | |
778 | warn_unused_label = value; | |
779 | break; | |
780 | ||
781 | case OPT_Wunused_parameter: | |
782 | warn_unused_parameter = value; | |
783 | break; | |
784 | ||
785 | case OPT_Wunused_value: | |
786 | warn_unused_value = value; | |
787 | break; | |
788 | ||
789 | case OPT_Wunused_variable: | |
790 | warn_unused_variable = value; | |
791 | break; | |
792 | ||
d185d268 NB |
793 | case OPT_aux_info: |
794 | case OPT_aux_info_: | |
795 | aux_info_file_name = arg; | |
796 | flag_gen_aux_info = 1; | |
797 | break; | |
798 | ||
799 | case OPT_auxbase: | |
800 | aux_base_name = arg; | |
801 | break; | |
802 | ||
803 | case OPT_auxbase_strip: | |
804 | { | |
805 | char *tmp = xstrdup (arg); | |
806 | strip_off_ending (tmp, strlen (tmp)); | |
807 | if (tmp[0]) | |
808 | aux_base_name = tmp; | |
809 | } | |
810 | break; | |
811 | ||
812 | case OPT_d: | |
813 | decode_d_option (arg); | |
814 | break; | |
815 | ||
816 | case OPT_dumpbase: | |
817 | dump_base_name = arg; | |
818 | break; | |
819 | ||
6ff3a151 NB |
820 | case OPT_fPIC: |
821 | flag_pic = value + value; | |
822 | break; | |
823 | ||
824 | case OPT_fPIE: | |
825 | flag_pie = value + value; | |
826 | break; | |
827 | ||
828 | case OPT_falign_functions: | |
5e14ae7e | 829 | align_functions = !value; |
058de654 NB |
830 | break; |
831 | ||
0fcd5dda NB |
832 | case OPT_falign_functions_: |
833 | align_functions = value; | |
834 | break; | |
835 | ||
6ff3a151 | 836 | case OPT_falign_jumps: |
5e14ae7e | 837 | align_jumps = !value; |
058de654 NB |
838 | break; |
839 | ||
0fcd5dda NB |
840 | case OPT_falign_jumps_: |
841 | align_jumps = value; | |
842 | break; | |
843 | ||
6ff3a151 | 844 | case OPT_falign_labels: |
5e14ae7e | 845 | align_labels = !value; |
058de654 NB |
846 | break; |
847 | ||
0fcd5dda NB |
848 | case OPT_falign_labels_: |
849 | align_labels = value; | |
850 | break; | |
851 | ||
6ff3a151 | 852 | case OPT_falign_loops: |
5e14ae7e | 853 | align_loops = !value; |
058de654 NB |
854 | break; |
855 | ||
0fcd5dda NB |
856 | case OPT_falign_loops_: |
857 | align_loops = value; | |
858 | break; | |
859 | ||
6ff3a151 NB |
860 | case OPT_fargument_alias: |
861 | flag_argument_noalias = !value; | |
862 | break; | |
863 | ||
864 | case OPT_fargument_noalias: | |
865 | flag_argument_noalias = value; | |
866 | break; | |
867 | ||
868 | case OPT_fargument_noalias_global: | |
869 | flag_argument_noalias = value + value; | |
870 | break; | |
871 | ||
872 | case OPT_fasynchronous_unwind_tables: | |
873 | flag_asynchronous_unwind_tables = value; | |
874 | break; | |
875 | ||
876 | case OPT_fbounds_check: | |
877 | flag_bounds_check = value; | |
878 | break; | |
879 | ||
880 | case OPT_fbranch_count_reg: | |
881 | flag_branch_on_count_reg = value; | |
882 | break; | |
883 | ||
884 | case OPT_fbranch_probabilities: | |
885 | flag_branch_probabilities = value; | |
886 | break; | |
887 | ||
de32c0cb NB |
888 | case OPT_fbranch_target_load_optimize: |
889 | flag_branch_target_load_optimize = value; | |
890 | break; | |
891 | ||
892 | case OPT_fbranch_target_load_optimize2: | |
893 | flag_branch_target_load_optimize2 = value; | |
894 | break; | |
895 | ||
058de654 NB |
896 | case OPT_fcall_used_: |
897 | fix_register (arg, 0, 1); | |
898 | break; | |
899 | ||
900 | case OPT_fcall_saved_: | |
901 | fix_register (arg, 0, 0); | |
902 | break; | |
903 | ||
de32c0cb NB |
904 | case OPT_fcaller_saves: |
905 | flag_caller_saves = value; | |
906 | break; | |
907 | ||
6ff3a151 NB |
908 | case OPT_fcommon: |
909 | flag_no_common = !value; | |
910 | break; | |
911 | ||
912 | case OPT_fcprop_registers: | |
913 | flag_cprop_registers = value; | |
914 | break; | |
915 | ||
de32c0cb NB |
916 | case OPT_fcrossjumping: |
917 | flag_crossjumping = value; | |
918 | break; | |
919 | ||
920 | case OPT_fcse_follow_jumps: | |
921 | flag_cse_follow_jumps = value; | |
922 | break; | |
923 | ||
924 | case OPT_fcse_skip_blocks: | |
925 | flag_cse_skip_blocks = value; | |
926 | break; | |
927 | ||
6ff3a151 NB |
928 | case OPT_fdata_sections: |
929 | flag_data_sections = value; | |
930 | break; | |
931 | ||
de32c0cb NB |
932 | case OPT_fdefer_pop: |
933 | flag_defer_pop = value; | |
934 | break; | |
935 | ||
936 | case OPT_fdelayed_branch: | |
937 | flag_delayed_branch = value; | |
938 | break; | |
939 | ||
940 | case OPT_fdelete_null_pointer_checks: | |
941 | flag_delete_null_pointer_checks = value; | |
942 | break; | |
943 | ||
944 | case OPT_fdiagnostics_show_location_: | |
945 | if (!strcmp (arg, "once")) | |
946 | diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE; | |
947 | else if (!strcmp (arg, "every-line")) | |
948 | diagnostic_prefixing_rule (global_dc) | |
949 | = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE; | |
950 | else | |
951 | return 0; | |
952 | break; | |
953 | ||
6ff3a151 NB |
954 | case OPT_fdump_unnumbered: |
955 | flag_dump_unnumbered = value; | |
956 | break; | |
957 | ||
de32c0cb NB |
958 | case OPT_feliminate_dwarf2_dups: |
959 | flag_eliminate_dwarf2_dups = value; | |
960 | break; | |
961 | ||
962 | case OPT_feliminate_unused_debug_types: | |
963 | flag_eliminate_unused_debug_types = value; | |
964 | break; | |
965 | ||
6a08f7b3 DP |
966 | case OPT_feliminate_unused_debug_symbols: |
967 | flag_debug_only_used_symbols = value; | |
968 | break; | |
969 | ||
6ff3a151 NB |
970 | case OPT_fexceptions: |
971 | flag_exceptions = value; | |
972 | break; | |
973 | ||
de32c0cb NB |
974 | case OPT_fexpensive_optimizations: |
975 | flag_expensive_optimizations = value; | |
976 | break; | |
977 | ||
058de654 NB |
978 | case OPT_ffast_math: |
979 | set_fast_math_flags (value); | |
980 | break; | |
981 | ||
6ff3a151 NB |
982 | case OPT_ffinite_math_only: |
983 | flag_finite_math_only = value; | |
984 | break; | |
985 | ||
058de654 NB |
986 | case OPT_ffixed_: |
987 | fix_register (arg, 1, 1); | |
988 | break; | |
989 | ||
de32c0cb NB |
990 | case OPT_ffunction_cse: |
991 | flag_no_function_cse = !value; | |
992 | break; | |
993 | ||
994 | case OPT_ffloat_store: | |
995 | flag_float_store = value; | |
996 | break; | |
997 | ||
998 | case OPT_fforce_addr: | |
999 | flag_force_addr = value; | |
1000 | break; | |
1001 | ||
1002 | case OPT_fforce_mem: | |
1003 | flag_force_mem = value; | |
1004 | break; | |
1005 | ||
6ff3a151 NB |
1006 | case OPT_ffunction_sections: |
1007 | flag_function_sections = value; | |
1008 | break; | |
1009 | ||
de32c0cb NB |
1010 | case OPT_fgcse: |
1011 | flag_gcse = value; | |
1012 | break; | |
1013 | ||
1014 | case OPT_fgcse_lm: | |
1015 | flag_gcse_lm = value; | |
1016 | break; | |
1017 | ||
1018 | case OPT_fgcse_sm: | |
1019 | flag_gcse_sm = value; | |
1020 | break; | |
1021 | ||
f5f2e3cd MH |
1022 | case OPT_fgcse_las: |
1023 | flag_gcse_las = value; | |
1024 | break; | |
1025 | ||
6ff3a151 NB |
1026 | case OPT_fguess_branch_probability: |
1027 | flag_guess_branch_prob = value; | |
1028 | break; | |
1029 | ||
1030 | case OPT_fident: | |
1031 | flag_no_ident = !value; | |
1032 | break; | |
1033 | ||
de32c0cb NB |
1034 | case OPT_fif_conversion: |
1035 | flag_if_conversion = value; | |
1036 | break; | |
1037 | ||
1038 | case OPT_fif_conversion2: | |
1039 | flag_if_conversion2 = value; | |
1040 | break; | |
1041 | ||
6ff3a151 NB |
1042 | case OPT_finhibit_size_directive: |
1043 | flag_inhibit_size_directive = value; | |
1044 | break; | |
1045 | ||
de32c0cb NB |
1046 | case OPT_finline: |
1047 | flag_no_inline = !value; | |
1048 | break; | |
1049 | ||
1050 | case OPT_finline_functions: | |
1051 | flag_inline_functions = value; | |
1052 | break; | |
1053 | ||
d302c9d6 NB |
1054 | case OPT_finline_limit_: |
1055 | case OPT_finline_limit_eq: | |
d302c9d6 NB |
1056 | set_param_value ("max-inline-insns-single", value / 2); |
1057 | set_param_value ("max-inline-insns-auto", value / 2); | |
1058 | set_param_value ("max-inline-insns-rtl", value); | |
d302c9d6 NB |
1059 | break; |
1060 | ||
6ff3a151 NB |
1061 | case OPT_finstrument_functions: |
1062 | flag_instrument_function_entry_exit = value; | |
1063 | break; | |
1064 | ||
de32c0cb NB |
1065 | case OPT_fkeep_inline_functions: |
1066 | flag_keep_inline_functions =value; | |
1067 | break; | |
1068 | ||
1069 | case OPT_fkeep_static_consts: | |
1070 | flag_keep_static_consts = value; | |
1071 | break; | |
1072 | ||
6ff3a151 NB |
1073 | case OPT_fleading_underscore: |
1074 | flag_leading_underscore = value; | |
1075 | break; | |
1076 | ||
de32c0cb NB |
1077 | case OPT_floop_optimize: |
1078 | flag_loop_optimize = value; | |
1079 | break; | |
1080 | ||
6ff3a151 NB |
1081 | case OPT_fmath_errno: |
1082 | flag_errno_math = value; | |
1083 | break; | |
1084 | ||
1085 | case OPT_fmem_report: | |
1086 | mem_report = value; | |
1087 | break; | |
1088 | ||
1089 | case OPT_fmerge_all_constants: | |
1090 | flag_merge_constants = value + value; | |
1091 | break; | |
1092 | ||
1093 | case OPT_fmerge_constants: | |
1094 | flag_merge_constants = value; | |
1095 | break; | |
1096 | ||
de32c0cb | 1097 | case OPT_fmessage_length_: |
b6fe0bb8 | 1098 | pp_set_line_maximum_length (global_dc->printer, value); |
de32c0cb NB |
1099 | break; |
1100 | ||
1101 | case OPT_fmove_all_movables: | |
1102 | flag_move_all_movables = value; | |
1103 | break; | |
1104 | ||
6ff3a151 NB |
1105 | case OPT_fnew_ra: |
1106 | flag_new_regalloc = value; | |
1107 | break; | |
1108 | ||
1109 | case OPT_fnon_call_exceptions: | |
1110 | flag_non_call_exceptions = value; | |
1111 | break; | |
1112 | ||
de32c0cb NB |
1113 | case OPT_fold_unroll_all_loops: |
1114 | flag_old_unroll_all_loops = value; | |
1115 | break; | |
1116 | ||
1117 | case OPT_fold_unroll_loops: | |
1118 | flag_old_unroll_loops = value; | |
1119 | break; | |
1120 | ||
1121 | case OPT_fomit_frame_pointer: | |
1122 | flag_omit_frame_pointer = value; | |
1123 | break; | |
1124 | ||
6ff3a151 NB |
1125 | case OPT_foptimize_register_move: |
1126 | flag_regmove = value; | |
1127 | break; | |
1128 | ||
de32c0cb NB |
1129 | case OPT_foptimize_sibling_calls: |
1130 | flag_optimize_sibling_calls = value; | |
1131 | break; | |
1132 | ||
6ff3a151 NB |
1133 | case OPT_fpack_struct: |
1134 | flag_pack_struct = value; | |
1135 | break; | |
1136 | ||
de32c0cb NB |
1137 | case OPT_fpeel_loops: |
1138 | flag_peel_loops = value; | |
1139 | break; | |
1140 | ||
1141 | case OPT_fpcc_struct_return: | |
1142 | flag_pcc_struct_return = value; | |
1143 | break; | |
1144 | ||
1145 | case OPT_fpeephole: | |
1146 | flag_no_peephole = !value; | |
1147 | break; | |
1148 | ||
6ff3a151 NB |
1149 | case OPT_fpeephole2: |
1150 | flag_peephole2 = value; | |
1151 | break; | |
1152 | ||
1153 | case OPT_fpic: | |
1154 | flag_pic = value; | |
1155 | break; | |
1156 | ||
1157 | case OPT_fpie: | |
1158 | flag_pie = value; | |
1159 | break; | |
1160 | ||
de32c0cb NB |
1161 | case OPT_fprefetch_loop_arrays: |
1162 | flag_prefetch_loop_arrays = value; | |
1163 | break; | |
1164 | ||
6ff3a151 NB |
1165 | case OPT_fprofile: |
1166 | profile_flag = value; | |
1167 | break; | |
1168 | ||
1169 | case OPT_fprofile_arcs: | |
1170 | profile_arc_flag = value; | |
1171 | break; | |
1172 | ||
fca9dc00 ZD |
1173 | case OPT_fprofile_values: |
1174 | flag_profile_values = value; | |
1175 | break; | |
1176 | ||
1177 | case OPT_fvpt: | |
1178 | flag_value_profile_transformations = value; | |
1179 | break; | |
1180 | ||
de32c0cb NB |
1181 | case OPT_frandom_seed: |
1182 | /* The real switch is -fno-random-seed. */ | |
1183 | if (value) | |
1184 | return 0; | |
1185 | flag_random_seed = NULL; | |
1186 | break; | |
1187 | ||
1188 | case OPT_frandom_seed_: | |
1189 | flag_random_seed = arg; | |
1190 | break; | |
1191 | ||
1192 | case OPT_freduce_all_givs: | |
1193 | flag_reduce_all_givs = value; | |
1194 | break; | |
1195 | ||
1196 | case OPT_freg_struct_return: | |
1197 | flag_pcc_struct_return = !value; | |
1198 | break; | |
1199 | ||
6ff3a151 NB |
1200 | case OPT_fregmove: |
1201 | flag_regmove = value; | |
1202 | break; | |
1203 | ||
1204 | case OPT_frename_registers: | |
1205 | flag_rename_registers = value; | |
1206 | break; | |
1207 | ||
1208 | case OPT_freorder_blocks: | |
1209 | flag_reorder_blocks = value; | |
1210 | break; | |
1211 | ||
1212 | case OPT_freorder_functions: | |
1213 | flag_reorder_functions = value; | |
1214 | break; | |
1215 | ||
de32c0cb NB |
1216 | case OPT_frerun_cse_after_loop: |
1217 | flag_rerun_cse_after_loop = value; | |
1218 | break; | |
1219 | ||
1220 | case OPT_frerun_loop_opt: | |
1221 | flag_rerun_loop_opt = value; | |
1222 | break; | |
1223 | ||
039c3d42 RS |
1224 | case OPT_frounding_math: |
1225 | flag_rounding_math = value; | |
1226 | break; | |
1227 | ||
6ff3a151 | 1228 | case OPT_fsched_interblock: |
039c3d42 | 1229 | flag_schedule_interblock = value; |
6ff3a151 NB |
1230 | break; |
1231 | ||
1232 | case OPT_fsched_spec: | |
1233 | flag_schedule_speculative = value; | |
1234 | break; | |
1235 | ||
1236 | case OPT_fsched_spec_load: | |
1237 | flag_schedule_speculative_load = value; | |
1238 | break; | |
1239 | ||
1240 | case OPT_fsched_spec_load_dangerous: | |
1241 | flag_schedule_speculative_load_dangerous = value; | |
1242 | break; | |
1243 | ||
de32c0cb NB |
1244 | case OPT_fsched_verbose_: |
1245 | #ifdef INSN_SCHEDULING | |
1246 | fix_sched_param ("verbose", arg); | |
1247 | break; | |
1248 | #else | |
1249 | return 0; | |
1250 | #endif | |
1251 | ||
6ff3a151 NB |
1252 | case OPT_fsched2_use_superblocks: |
1253 | flag_sched2_use_superblocks = value; | |
1254 | break; | |
1255 | ||
1256 | case OPT_fsched2_use_traces: | |
1257 | flag_sched2_use_traces = value; | |
1258 | break; | |
1259 | ||
de32c0cb NB |
1260 | case OPT_fschedule_insns: |
1261 | flag_schedule_insns = value; | |
1262 | break; | |
1263 | ||
1264 | case OPT_fschedule_insns2: | |
1265 | flag_schedule_insns_after_reload = value; | |
1266 | break; | |
1267 | ||
569fa502 DN |
1268 | case OPT_fsched_stalled_insns: |
1269 | flag_sched_stalled_insns = value; | |
1270 | break; | |
1271 | ||
1272 | case OPT_fsched_stalled_insns_: | |
1273 | flag_sched_stalled_insns = value; | |
1274 | if (flag_sched_stalled_insns == 0) | |
1275 | flag_sched_stalled_insns = -1; | |
1276 | break; | |
1277 | ||
1278 | case OPT_fsched_stalled_insns_dep: | |
1279 | flag_sched_stalled_insns_dep = 1; | |
1280 | break; | |
1281 | ||
1282 | case OPT_fsched_stalled_insns_dep_: | |
1283 | flag_sched_stalled_insns_dep = value; | |
1284 | break; | |
1285 | ||
de32c0cb NB |
1286 | case OPT_fshared_data: |
1287 | flag_shared_data = value; | |
1288 | break; | |
1289 | ||
6ff3a151 NB |
1290 | case OPT_fsignaling_nans: |
1291 | flag_signaling_nans = value; | |
1292 | break; | |
1293 | ||
1294 | case OPT_fsingle_precision_constant: | |
1295 | flag_single_precision_constant = value; | |
1296 | break; | |
1297 | ||
6ff3a151 NB |
1298 | case OPT_fstack_check: |
1299 | flag_stack_check = value; | |
1300 | break; | |
1301 | ||
de32c0cb NB |
1302 | case OPT_fstack_limit: |
1303 | /* The real switch is -fno-stack-limit. */ | |
1304 | if (value) | |
1305 | return 0; | |
1306 | stack_limit_rtx = NULL_RTX; | |
1307 | break; | |
1308 | ||
058de654 NB |
1309 | case OPT_fstack_limit_register_: |
1310 | { | |
1311 | int reg = decode_reg_name (arg); | |
1312 | if (reg < 0) | |
1313 | error ("unrecognized register name \"%s\"", arg); | |
1314 | else | |
1315 | stack_limit_rtx = gen_rtx_REG (Pmode, reg); | |
1316 | } | |
1317 | break; | |
1318 | ||
1319 | case OPT_fstack_limit_symbol_: | |
1320 | stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg)); | |
1321 | break; | |
1322 | ||
de32c0cb NB |
1323 | case OPT_fstrength_reduce: |
1324 | flag_strength_reduce = value; | |
1325 | break; | |
1326 | ||
6ff3a151 NB |
1327 | case OPT_fstrict_aliasing: |
1328 | flag_strict_aliasing = value; | |
1329 | break; | |
1330 | ||
de32c0cb NB |
1331 | case OPT_fsyntax_only: |
1332 | flag_syntax_only = value; | |
1333 | break; | |
1334 | ||
6ff3a151 NB |
1335 | case OPT_ftest_coverage: |
1336 | flag_test_coverage = value; | |
1337 | break; | |
1338 | ||
de32c0cb NB |
1339 | case OPT_fthread_jumps: |
1340 | flag_thread_jumps = value; | |
1341 | break; | |
1342 | ||
6ff3a151 NB |
1343 | case OPT_ftime_report: |
1344 | time_report = value; | |
0bd95603 | 1345 | break; |
6ff3a151 | 1346 | |
058de654 NB |
1347 | case OPT_ftls_model_: |
1348 | if (!strcmp (arg, "global-dynamic")) | |
1349 | flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC; | |
1350 | else if (!strcmp (arg, "local-dynamic")) | |
1351 | flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC; | |
1352 | else if (!strcmp (arg, "initial-exec")) | |
1353 | flag_tls_default = TLS_MODEL_INITIAL_EXEC; | |
1354 | else if (!strcmp (arg, "local-exec")) | |
1355 | flag_tls_default = TLS_MODEL_LOCAL_EXEC; | |
1356 | else | |
1357 | warning ("unknown tls-model \"%s\"", arg); | |
1358 | break; | |
1359 | ||
de32c0cb NB |
1360 | case OPT_ftracer: |
1361 | flag_tracer = value; | |
1362 | break; | |
1363 | ||
6ff3a151 NB |
1364 | case OPT_ftrapping_math: |
1365 | flag_trapping_math = value; | |
1366 | break; | |
1367 | ||
1368 | case OPT_ftrapv: | |
1369 | flag_trapv = value; | |
1370 | break; | |
1371 | ||
de32c0cb NB |
1372 | case OPT_funit_at_a_time: |
1373 | flag_unit_at_a_time = value; | |
1374 | break; | |
1375 | ||
1376 | case OPT_funroll_all_loops: | |
1377 | flag_unroll_all_loops = value; | |
1378 | break; | |
1379 | ||
1380 | case OPT_funroll_loops: | |
1381 | flag_unroll_loops = value; | |
1382 | break; | |
1383 | ||
6ff3a151 NB |
1384 | case OPT_funsafe_math_optimizations: |
1385 | flag_unsafe_math_optimizations = value; | |
1386 | break; | |
1387 | ||
de32c0cb NB |
1388 | case OPT_funswitch_loops: |
1389 | flag_unswitch_loops = value; | |
1390 | break; | |
1391 | ||
6ff3a151 NB |
1392 | case OPT_funwind_tables: |
1393 | flag_unwind_tables = value; | |
1394 | break; | |
1395 | ||
1396 | case OPT_fverbose_asm: | |
1397 | flag_verbose_asm = value; | |
1398 | break; | |
7260e9a0 JH |
1399 | |
1400 | case OPT_fweb: | |
1401 | flag_web = value; | |
1402 | break; | |
6ff3a151 NB |
1403 | |
1404 | case OPT_fwrapv: | |
1405 | flag_wrapv = value; | |
1406 | break; | |
1407 | ||
de32c0cb NB |
1408 | case OPT_fwritable_strings: |
1409 | flag_writable_strings = value; | |
1410 | break; | |
1411 | ||
6ff3a151 NB |
1412 | case OPT_fzero_initialized_in_bss: |
1413 | flag_zero_initialized_in_bss = value; | |
1414 | break; | |
1415 | ||
e01cc6dc | 1416 | case OPT_g: |
df38ffef NB |
1417 | set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg); |
1418 | break; | |
1419 | ||
1420 | case OPT_gcoff: | |
1421 | set_debug_level (SDB_DEBUG, false, arg); | |
1422 | break; | |
1423 | ||
1424 | case OPT_gdwarf: | |
1425 | if (*arg) | |
1426 | { | |
1427 | error ("use -gdwarf -gN for DWARF v1 level N, " | |
1428 | "and -gdwarf-2 for DWARF v2" ); | |
1429 | break; | |
1430 | } | |
1431 | ||
1432 | /* Fall through. */ | |
1433 | case OPT_gdwarf_: | |
1434 | set_debug_level (DWARF_DEBUG, code == OPT_gdwarf_, arg); | |
1435 | break; | |
1436 | ||
1437 | case OPT_gdwarf_2: | |
1438 | set_debug_level (DWARF2_DEBUG, false, arg); | |
1439 | break; | |
1440 | ||
1441 | case OPT_ggdb: | |
1442 | set_debug_level (NO_DEBUG, 2, arg); | |
1443 | break; | |
1444 | ||
1445 | case OPT_gstabs: | |
1446 | case OPT_gstabs_: | |
1447 | set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg); | |
1448 | break; | |
1449 | ||
1450 | case OPT_gvms: | |
1451 | set_debug_level (VMS_DEBUG, false, arg); | |
1452 | break; | |
1453 | ||
1454 | case OPT_gxcoff: | |
1455 | case OPT_gxcoff_: | |
1456 | set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg); | |
e01cc6dc NB |
1457 | break; |
1458 | ||
903caebf NB |
1459 | case OPT_m: |
1460 | set_target_switch (arg); | |
1461 | break; | |
1462 | ||
d185d268 NB |
1463 | case OPT_o: |
1464 | asm_file_name = arg; | |
1465 | break; | |
1466 | ||
1467 | case OPT_p: | |
1468 | profile_flag = 1; | |
1469 | break; | |
1470 | ||
1471 | case OPT_pedantic: | |
1472 | pedantic = 1; | |
1473 | break; | |
1474 | ||
1475 | case OPT_pedantic_errors: | |
1476 | flag_pedantic_errors = pedantic = 1; | |
1477 | break; | |
1478 | ||
d7b42618 NB |
1479 | case OPT_quiet: |
1480 | quiet_flag = 1; | |
1481 | break; | |
d185d268 NB |
1482 | |
1483 | case OPT_version: | |
1484 | version_flag = 1; | |
1485 | break; | |
1486 | ||
1487 | case OPT_w: | |
e01cc6dc | 1488 | inhibit_warnings = true; |
d185d268 | 1489 | break; |
d7b42618 NB |
1490 | } |
1491 | ||
1492 | return 1; | |
1493 | } | |
903caebf NB |
1494 | |
1495 | /* Handle --param NAME=VALUE. */ | |
1496 | static void | |
1497 | handle_param (const char *carg) | |
1498 | { | |
1499 | char *equal, *arg; | |
1500 | int value; | |
1501 | ||
1502 | arg = xstrdup (carg); | |
1503 | equal = strchr (arg, '='); | |
1504 | if (!equal) | |
1505 | error ("%s: --param arguments should be of the form NAME=VALUE", arg); | |
1506 | else | |
1507 | { | |
1508 | value = integral_argument (equal + 1); | |
1509 | if (value == -1) | |
1510 | error ("invalid --param value `%s'", equal + 1); | |
1511 | else | |
1512 | { | |
1513 | *equal = '\0'; | |
1514 | set_param_value (arg, value); | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | free (arg); | |
1519 | } | |
1520 | ||
1521 | /* Handle -W and -Wextra. */ | |
1522 | static void | |
1523 | set_Wextra (int setting) | |
1524 | { | |
1525 | extra_warnings = setting; | |
1526 | warn_unused_value = setting; | |
1527 | warn_unused_parameter = (setting && maybe_warn_unused_parameter); | |
1528 | ||
1529 | /* We save the value of warn_uninitialized, since if they put | |
1530 | -Wuninitialized on the command line, we need to generate a | |
1531 | warning about not using it without also specifying -O. */ | |
1532 | if (setting == 0) | |
1533 | warn_uninitialized = 0; | |
1534 | else if (warn_uninitialized != 1) | |
1535 | warn_uninitialized = 2; | |
1536 | } | |
1537 | ||
1538 | /* Initialize unused warning flags. */ | |
1539 | void | |
1540 | set_Wunused (int setting) | |
1541 | { | |
1542 | warn_unused_function = setting; | |
1543 | warn_unused_label = setting; | |
1544 | /* Unused function parameter warnings are reported when either | |
1545 | ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified. | |
1546 | Thus, if -Wextra has already been seen, set warn_unused_parameter; | |
1547 | otherwise set maybe_warn_extra_parameter, which will be picked up | |
1548 | by set_Wextra. */ | |
1549 | maybe_warn_unused_parameter = setting; | |
1550 | warn_unused_parameter = (setting && extra_warnings); | |
1551 | warn_unused_variable = setting; | |
1552 | warn_unused_value = setting; | |
1553 | } | |
058de654 NB |
1554 | |
1555 | /* The following routines are useful in setting all the flags that | |
1556 | -ffast-math and -fno-fast-math imply. */ | |
1557 | void | |
1558 | set_fast_math_flags (int set) | |
1559 | { | |
1560 | flag_trapping_math = !set; | |
1561 | flag_unsafe_math_optimizations = set; | |
1562 | flag_finite_math_only = set; | |
1563 | flag_errno_math = !set; | |
1564 | if (set) | |
039c3d42 RS |
1565 | { |
1566 | flag_signaling_nans = 0; | |
1567 | flag_rounding_math = 0; | |
1568 | } | |
058de654 NB |
1569 | } |
1570 | ||
1571 | /* Return true iff flags are set as if -ffast-math. */ | |
1572 | bool | |
1573 | fast_math_flags_set_p (void) | |
1574 | { | |
1575 | return (!flag_trapping_math | |
1576 | && flag_unsafe_math_optimizations | |
1577 | && flag_finite_math_only | |
1578 | && !flag_errno_math); | |
1579 | } | |
cf03fd63 | 1580 | |
df38ffef NB |
1581 | /* Handle a debug output -g switch. EXTENDED is true or false to support |
1582 | extended output (2 is special and means "-ggdb" was given). */ | |
1583 | static void | |
1584 | set_debug_level (enum debug_info_type type, int extended, const char *arg) | |
1585 | { | |
1586 | static bool type_explicit; | |
1587 | ||
1588 | use_gnu_debug_info_extensions = extended; | |
1589 | ||
1590 | if (type == NO_DEBUG) | |
1591 | { | |
1592 | if (write_symbols == NO_DEBUG) | |
1593 | { | |
1594 | write_symbols = PREFERRED_DEBUGGING_TYPE; | |
1595 | ||
1596 | if (extended == 2) | |
1597 | { | |
1598 | #ifdef DWARF2_DEBUGGING_INFO | |
1599 | write_symbols = DWARF2_DEBUG; | |
1600 | #elif defined DBX_DEBUGGING_INFO | |
1601 | write_symbols = DBX_DEBUG; | |
1602 | #endif | |
1603 | } | |
1604 | ||
1605 | if (write_symbols == NO_DEBUG) | |
1606 | warning ("target system does not support debug output"); | |
1607 | } | |
1608 | } | |
1609 | else | |
1610 | { | |
1611 | /* Does it conflict with an already selected type? */ | |
1612 | if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols) | |
1613 | error ("debug format \"%s\" conflicts with prior selection", | |
1614 | debug_type_names[type]); | |
1615 | write_symbols = type; | |
1616 | type_explicit = true; | |
1617 | } | |
1618 | ||
1619 | /* A debug flag without a level defaults to level 2. */ | |
1620 | if (*arg == '\0') | |
1621 | { | |
1622 | if (!debug_info_level) | |
1623 | debug_info_level = 2; | |
1624 | } | |
1625 | else | |
1626 | { | |
1627 | debug_info_level = integral_argument (arg); | |
1628 | if (debug_info_level == (unsigned int) -1) | |
1629 | error ("unrecognised debug output level \"%s\"", arg); | |
1630 | else if (debug_info_level > 3) | |
1631 | error ("debug output level %s is too high", arg); | |
1632 | } | |
1633 | } | |
1634 | ||
cf03fd63 NB |
1635 | /* Output --help text. */ |
1636 | static void | |
1637 | print_help (void) | |
72de27ea NB |
1638 | { |
1639 | size_t i; | |
2cc98056 NB |
1640 | const char *p; |
1641 | ||
1642 | GET_ENVIRONMENT (p, "COLUMNS"); | |
1643 | if (p) | |
1644 | { | |
1645 | int value = atoi (p); | |
1646 | if (value > 0) | |
1647 | columns = value; | |
1648 | } | |
72de27ea NB |
1649 | |
1650 | puts (_("The following options are language-independent:\n")); | |
1651 | ||
1652 | print_filtered_help (CL_COMMON); | |
2cc98056 | 1653 | print_param_help (); |
72de27ea NB |
1654 | |
1655 | for (i = 0; lang_names[i]; i++) | |
1656 | { | |
2cc98056 | 1657 | printf (_("The %s front end recognizes the following options:\n\n"), |
72de27ea NB |
1658 | lang_names[i]); |
1659 | print_filtered_help (1U << i); | |
1660 | } | |
1661 | ||
df38ffef | 1662 | display_target_options (); |
72de27ea NB |
1663 | } |
1664 | ||
2cc98056 NB |
1665 | /* Print the help for --param. */ |
1666 | static void | |
1667 | print_param_help (void) | |
1668 | { | |
1669 | size_t i; | |
1670 | ||
1671 | puts (_("The --param option recognizes the following as parameters:\n")); | |
1672 | ||
1673 | for (i = 0; i < LAST_PARAM; i++) | |
1674 | { | |
1675 | const char *help = compiler_params[i].help; | |
1676 | const char *param = compiler_params[i].option; | |
1677 | ||
1678 | if (help == NULL || *help == '\0') | |
1679 | help = undocumented_msg; | |
1680 | ||
1681 | /* Get the translation. */ | |
1682 | help = _(help); | |
1683 | ||
1684 | wrap_help (help, param, strlen (param)); | |
1685 | } | |
1686 | ||
1687 | putchar ('\n'); | |
1688 | } | |
1689 | ||
72de27ea NB |
1690 | /* Print help for a specific front-end, etc. */ |
1691 | static void | |
1692 | print_filtered_help (unsigned int flag) | |
cf03fd63 | 1693 | { |
2cc98056 NB |
1694 | unsigned int i, len, filter, indent = 0; |
1695 | bool duplicates = false; | |
1696 | const char *help, *opt, *tab; | |
1697 | static char *printed; | |
1698 | ||
1699 | if (flag == CL_COMMON) | |
1700 | { | |
1701 | filter = flag; | |
1702 | if (!printed) | |
1703 | printed = xmalloc (cl_options_count); | |
1704 | memset (printed, 0, cl_options_count); | |
1705 | } | |
1706 | else | |
1707 | { | |
1708 | /* Don't print COMMON options twice. */ | |
1709 | filter = flag | CL_COMMON; | |
cf03fd63 | 1710 | |
2cc98056 NB |
1711 | for (i = 0; i < cl_options_count; i++) |
1712 | { | |
1713 | if ((cl_options[i].flags & filter) != flag) | |
1714 | continue; | |
1715 | ||
1716 | /* Skip help for internal switches. */ | |
1717 | if (cl_options[i].flags & CL_UNDOCUMENTED) | |
1718 | continue; | |
1719 | ||
1720 | /* Skip switches that have already been printed, mark them to be | |
1721 | listed later. */ | |
1722 | if (printed[i]) | |
1723 | { | |
1724 | duplicates = true; | |
1725 | indent = print_switch (cl_options[i].opt_text, indent); | |
1726 | } | |
1727 | } | |
1728 | ||
1729 | if (duplicates) | |
1730 | { | |
1731 | putchar ('\n'); | |
1732 | putchar ('\n'); | |
1733 | } | |
1734 | } | |
cf03fd63 NB |
1735 | |
1736 | for (i = 0; i < cl_options_count; i++) | |
1737 | { | |
72de27ea NB |
1738 | if ((cl_options[i].flags & filter) != flag) |
1739 | continue; | |
1740 | ||
f2ac9964 NB |
1741 | /* Skip help for internal switches. */ |
1742 | if (cl_options[i].flags & CL_UNDOCUMENTED) | |
1743 | continue; | |
1744 | ||
2cc98056 NB |
1745 | /* Skip switches that have already been printed. */ |
1746 | if (printed[i]) | |
1747 | continue; | |
1748 | ||
1749 | printed[i] = true; | |
1750 | ||
72de27ea | 1751 | help = cl_options[i].help; |
cf03fd63 | 1752 | if (!help) |
2cc98056 | 1753 | help = undocumented_msg; |
cf03fd63 NB |
1754 | |
1755 | /* Get the translation. */ | |
1756 | help = _(help); | |
1757 | ||
1758 | tab = strchr (help, '\t'); | |
1759 | if (tab) | |
1760 | { | |
1761 | len = tab - help; | |
1762 | opt = help; | |
1763 | help = tab + 1; | |
1764 | } | |
1765 | else | |
1766 | { | |
1767 | opt = cl_options[i].opt_text; | |
1768 | len = strlen (opt); | |
1769 | } | |
1770 | ||
1771 | wrap_help (help, opt, len); | |
1772 | } | |
2cc98056 NB |
1773 | |
1774 | putchar ('\n'); | |
1775 | } | |
1776 | ||
1777 | /* Output ITEM, of length ITEM_WIDTH, in the left column, followed by | |
1778 | word-wrapped HELP in a second column. */ | |
1779 | static unsigned int | |
1780 | print_switch (const char *text, unsigned int indent) | |
1781 | { | |
1782 | unsigned int len = strlen (text) + 1; /* trailing comma */ | |
1783 | ||
1784 | if (indent) | |
1785 | { | |
1786 | putchar (','); | |
1787 | if (indent + len > columns) | |
1788 | { | |
1789 | putchar ('\n'); | |
1790 | putchar (' '); | |
1791 | indent = 1; | |
1792 | } | |
1793 | } | |
1794 | else | |
1795 | putchar (' '); | |
1796 | ||
1797 | putchar (' '); | |
1798 | fputs (text, stdout); | |
1799 | ||
1800 | return indent + len + 1; | |
cf03fd63 NB |
1801 | } |
1802 | ||
1803 | /* Output ITEM, of length ITEM_WIDTH, in the left column, followed by | |
1804 | word-wrapped HELP in a second column. */ | |
1805 | static void | |
2cc98056 | 1806 | wrap_help (const char *help, const char *item, unsigned int item_width) |
cf03fd63 | 1807 | { |
2cc98056 | 1808 | unsigned int col_width = 27; |
21789816 | 1809 | unsigned int remaining, room, len; |
cf03fd63 NB |
1810 | |
1811 | remaining = strlen (help); | |
1812 | ||
1813 | do | |
1814 | { | |
1815 | room = columns - 3 - MAX (col_width, item_width); | |
2cc98056 NB |
1816 | if (room > columns) |
1817 | room = 0; | |
cf03fd63 NB |
1818 | len = remaining; |
1819 | ||
1820 | if (room < len) | |
1821 | { | |
21789816 | 1822 | unsigned int i; |
cf03fd63 NB |
1823 | |
1824 | for (i = 0; help[i]; i++) | |
1825 | { | |
1826 | if (i >= room && len != remaining) | |
1827 | break; | |
1828 | if (help[i] == ' ') | |
1829 | len = i; | |
2cc98056 NB |
1830 | else if ((help[i] == '-' || help[i] == '/') |
1831 | && help[i + 1] != ' ' | |
b50d9339 | 1832 | && i > 0 && ISALPHA (help[i - 1])) |
cf03fd63 NB |
1833 | len = i + 1; |
1834 | } | |
1835 | } | |
1836 | ||
1837 | printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help); | |
1838 | item_width = 0; | |
1839 | while (help[len] == ' ') | |
1840 | len++; | |
1841 | help += len; | |
1842 | remaining -= len; | |
1843 | } | |
1844 | while (remaining); | |
1845 | } |