]>
Commit | Line | Data |
---|---|---|
d7b42618 | 1 | ; Options for the language- and target-independent parts of the compiler. |
50431bc4 | 2 | |
23a5b65a | 3 | ; Copyright (C) 2003-2014 Free Software Foundation, Inc. |
d7b42618 NB |
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 | |
9dcd6f09 | 9 | ; Software Foundation; either version 3, or (at your option) any later |
d7b42618 | 10 | ; version. |
c22cacf3 | 11 | ; |
d7b42618 NB |
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. | |
c22cacf3 | 16 | ; |
d7b42618 | 17 | ; You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
18 | ; along with GCC; see the file COPYING3. If not see |
19 | ; <http://www.gnu.org/licenses/>. | |
d7b42618 | 20 | |
71733172 | 21 | ; See the GCC internals manual (options.texi) for a description of this file's format. |
d7b42618 NB |
22 | |
23 | ; Please try to keep this file in ASCII collating order. | |
24 | ||
e90afde6 JM |
25 | Variable |
26 | int target_flags | |
27 | ||
46625112 JM |
28 | Variable |
29 | int optimize | |
30 | ||
31 | Variable | |
32 | int optimize_size | |
33 | ||
bf7a7185 RG |
34 | Variable |
35 | int optimize_debug | |
36 | ||
0a8134ca JM |
37 | ; Not used directly to control optimizations, only to save -Ofast |
38 | ; setting for "optimize" attributes. | |
39 | Variable | |
40 | int optimize_fast | |
41 | ||
a7d0d30f JM |
42 | ; True if this is the lto front end. This is used to disable gimple |
43 | ; generation and lowering passes that are normally run on the output | |
44 | ; of a front end. These passes must be bypassed for lto since they | |
45 | ; have already been done before the gimple was written. | |
46 | Variable | |
47 | bool in_lto_p = false | |
48 | ||
a75bfaa6 JM |
49 | ; 0 means straightforward implementation of complex divide acceptable. |
50 | ; 1 means wide ranges of inputs must work for complex divide. | |
51 | ; 2 means C99-like requirements for complex multiply and divide. | |
52 | Variable | |
53 | int flag_complex_method = 1 | |
54 | ||
55 | ; Nonzero if subexpressions must be evaluated from left-to-right. | |
56 | Variable | |
57 | int flag_evaluation_order = 0 | |
58 | ||
a75bfaa6 JM |
59 | ; Language specific warning pass for unused results. |
60 | Variable | |
61 | bool flag_warn_unused_result = false | |
62 | ||
48476d13 JM |
63 | Variable |
64 | int *param_values | |
65 | ||
d5478783 JM |
66 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
67 | Variable | |
68 | int flag_generate_lto | |
69 | ||
70 | ; True to warn about any objects definitions whose size is larger | |
71 | ; than N bytes. Also want about function definitions whose returned | |
72 | ; values are larger than N bytes, where N is 'larger_than_size'. | |
73 | Variable | |
74 | bool warn_larger_than | |
75 | ||
76 | Variable | |
77 | HOST_WIDE_INT larger_than_size | |
78 | ||
79 | ; True to warn about any function whose frame size is larger | |
80 | ; than N bytes. | |
81 | Variable | |
82 | bool warn_frame_larger_than | |
83 | ||
84 | Variable | |
85 | HOST_WIDE_INT frame_larger_than_size | |
86 | ||
87 | ; Nonzero means we should be saving declaration info into a .X file. | |
88 | Variable | |
89 | int flag_gen_aux_info = 0 | |
90 | ||
91 | ; Nonzero if we are compiling code for a shared library, zero for | |
92 | ; executable. | |
93 | Variable | |
94 | int flag_shlib | |
95 | ||
6a1f6c9c JM |
96 | ; These two are really VEC(char_p,heap) *. |
97 | ||
98 | Variable | |
99 | void *flag_instrument_functions_exclude_functions | |
100 | ||
101 | Variable | |
102 | void *flag_instrument_functions_exclude_files | |
103 | ||
69ccdddb JM |
104 | ; Generic structs (e.g. templates not explicitly specialized) |
105 | ; may not have a compilation unit associated with them, and so | |
106 | ; may need to be treated differently from ordinary structs. | |
107 | ; | |
108 | ; Structs only handled by reference (indirectly), will also usually | |
109 | ; not need as much debugging information. | |
110 | ||
111 | Variable | |
112 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
113 | ||
114 | Variable | |
115 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
116 | ||
0576d21f JM |
117 | ; True if we should exit after parsing options. |
118 | Variable | |
119 | bool exit_after_options | |
120 | ||
121 | ; Type(s) of debugging information we are producing (if any). See | |
122 | ; flag-types.h for the definitions of the different possible types of | |
123 | ; debugging information. | |
124 | Variable | |
125 | enum debug_info_type write_symbols = NO_DEBUG | |
126 | ||
127 | ; Level of debugging information we are producing. See flag-types.h | |
128 | ; for the definitions of the different possible levels. | |
129 | Variable | |
130 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
131 | ||
132 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
133 | ; debugging information. Currently, this only has an effect when | |
134 | ; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. | |
135 | Variable | |
136 | bool use_gnu_debug_info_extensions | |
137 | ||
299404a1 JM |
138 | ; Original value of maximum field alignment in bytes, specified via |
139 | ; -fpack-struct=<value>. | |
140 | Variable | |
141 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
142 | ||
5e471ea6 JM |
143 | ; Type of stack check. |
144 | Variable | |
145 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
146 | ||
a11e0df4 EB |
147 | ; True if stack usage information needs to be computed. |
148 | Variable | |
149 | bool flag_stack_usage_info = false | |
150 | ||
299404a1 JM |
151 | ; -dA causes debug commentary information to be produced in |
152 | ; the generated assembly code (to make it more readable). This option | |
153 | ; is generally only of use to those who actually need to read the | |
154 | ; generated assembly code (perhaps while debugging the compiler itself). | |
155 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
156 | ; to be a catchall for printing debug information in the assembler file. | |
157 | Variable | |
158 | int flag_debug_asm | |
159 | ||
160 | ; -dP causes the rtl to be emitted as a comment in assembly. | |
161 | Variable | |
162 | int flag_dump_rtl_in_asm | |
163 | ||
164 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
165 | Variable | |
166 | bool flag_dump_all_passed | |
167 | ||
168 | ; Other flags saying which kinds of debugging dump have been requested. | |
169 | ||
170 | Variable | |
171 | int rtl_dump_and_exit | |
172 | ||
173 | Variable | |
174 | int flag_print_asm_name | |
175 | ||
a803773f JM |
176 | ; Name of top-level original source file (what was input to cpp). |
177 | ; This comes from the #-command at the beginning of the actual input. | |
178 | ; If there isn't any there, then this is the cc1 input file name. | |
179 | Variable | |
180 | const char *main_input_filename | |
181 | ||
182 | ; Pointer to base name in main_input_filename, with directories and a | |
183 | ; single final extension removed, and the length of this base | |
184 | ; name. | |
185 | ||
186 | Variable | |
187 | const char *main_input_basename | |
188 | ||
189 | Variable | |
190 | int main_input_baselength | |
191 | ||
299404a1 JM |
192 | ; Which options have been printed by --help. |
193 | Variable | |
194 | char *help_printed | |
195 | ||
e6d4b984 JM |
196 | ; Which enums have been printed by --help. 0 = not printed, no |
197 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
198 | ; = printed. | |
199 | Variable | |
200 | char *help_enum_printed | |
201 | ||
299404a1 JM |
202 | ; The number of columns for --help output. |
203 | Variable | |
204 | unsigned int help_columns | |
205 | ||
206 | ; Whether this options structure has been through finish_options | |
207 | Variable | |
208 | bool flag_opts_finished | |
209 | ||
de5a5fa1 MP |
210 | ; What the sanitizer should instrument |
211 | Variable | |
212 | unsigned int flag_sanitize | |
213 | ||
91035653 JJ |
214 | ; Flag whether a prefix has been added to dump_base_name |
215 | Variable | |
216 | bool dump_base_name_prefixed = false | |
217 | ||
603349bf JM |
218 | ### |
219 | Driver | |
220 | ||
e200444e JM |
221 | -assemble |
222 | Driver Alias(S) | |
223 | ||
224 | -compile | |
225 | Driver Alias(c) | |
226 | ||
227 | -coverage | |
228 | Driver Alias(coverage) | |
229 | ||
230 | -debug | |
231 | Common Alias(g) | |
232 | ||
233 | -dump | |
234 | Common Separate Alias(d) | |
235 | ||
236 | -dump= | |
237 | Common Joined Alias(d) | |
238 | ||
239 | -dumpbase | |
240 | Common Separate Alias(dumpbase) | |
241 | ||
242 | -dumpdir | |
243 | Common Separate Alias(dumpdir) | |
244 | ||
245 | -entry | |
246 | Driver Separate Alias(e) | |
247 | ||
248 | -entry= | |
249 | Driver Joined Alias(e) | |
250 | ||
251 | -extra-warnings | |
252 | Common Warning Alias(Wextra) | |
253 | ||
254 | -for-assembler | |
255 | Driver Separate Alias(Xassembler) | |
256 | ||
257 | -for-assembler= | |
258 | Driver JoinedOrMissing Alias(Xassembler) | |
259 | ||
260 | -for-linker | |
261 | Driver Separate Alias(Xlinker) | |
262 | ||
263 | -for-linker= | |
264 | Driver JoinedOrMissing Alias(Xlinker) | |
265 | ||
266 | -force-link | |
267 | Driver Separate Alias(u) | |
268 | ||
269 | -force-link= | |
270 | Driver Joined Alias(u) | |
271 | ||
d185d268 | 272 | -help |
e200444e | 273 | Common Driver Var(help_flag) |
cf03fd63 | 274 | Display this information |
d185d268 | 275 | |
c662432e | 276 | -help= |
603349bf | 277 | Common Driver Report Joined |
c662432e | 278 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params |
903caebf | 279 | |
e200444e JM |
280 | -language |
281 | Driver Separate Alias(x) | |
282 | ||
283 | -language= | |
284 | Driver Joined Alias(x) | |
285 | ||
286 | -library-directory | |
287 | Driver Separate Alias(L) | |
288 | ||
289 | -library-directory= | |
290 | Driver Joined Alias(L) | |
291 | ||
292 | -no-canonical-prefixes | |
293 | Driver Alias(no-canonical-prefixes) | |
294 | ||
295 | -no-standard-libraries | |
296 | Driver Alias(nostdlib) | |
297 | ||
28b4fc51 JM |
298 | -no-sysroot-suffix |
299 | Driver Var(no_sysroot_suffix) | |
300 | ||
e200444e JM |
301 | -no-warnings |
302 | Common Alias(w) | |
303 | ||
304 | -optimize | |
305 | Common Alias(O) | |
306 | ||
307 | -output | |
308 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
309 | ||
310 | -output= | |
311 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
312 | ||
313 | -pass-exit-codes | |
314 | Driver Alias(pass-exit-codes) | |
315 | ||
316 | -pedantic | |
c1771a20 | 317 | Common Alias(Wpedantic) |
e200444e JM |
318 | |
319 | -pedantic-errors | |
320 | Common Alias(pedantic-errors) | |
321 | ||
322 | -pie | |
5460e1fc | 323 | Driver Alias(pie) |
e200444e JM |
324 | |
325 | -pipe | |
326 | Driver Alias(pipe) | |
327 | ||
328 | -prefix | |
329 | Driver Separate Alias(B) | |
330 | ||
331 | -prefix= | |
332 | Driver JoinedOrMissing Alias(B) | |
333 | ||
334 | -preprocess | |
335 | Driver Alias(E) | |
336 | ||
337 | -print-file-name | |
338 | Driver Separate Alias(print-file-name=) | |
339 | ||
340 | -print-file-name= | |
341 | Driver JoinedOrMissing Alias(print-file-name=) | |
342 | ||
343 | -print-libgcc-file-name | |
344 | Driver Alias(print-libgcc-file-name) | |
345 | ||
346 | -print-multi-directory | |
347 | Driver Alias(print-multi-directory) | |
348 | ||
349 | -print-multi-lib | |
350 | Driver Alias(print-multi-lib) | |
351 | ||
352 | -print-multi-os-directory | |
353 | Driver Alias(print-multi-os-directory) | |
354 | ||
e0cdc09f MK |
355 | -print-multiarch |
356 | Driver Alias(print-multiarch) | |
357 | ||
e200444e JM |
358 | -print-prog-name |
359 | Driver Separate Alias(print-prog-name=) | |
360 | ||
361 | -print-prog-name= | |
362 | Driver JoinedOrMissing Alias(print-prog-name=) | |
363 | ||
364 | -print-search-dirs | |
365 | Driver Alias(print-search-dirs) | |
366 | ||
367 | -print-sysroot | |
368 | Driver Alias(print-sysroot) | |
369 | ||
370 | -print-sysroot-headers-suffix | |
371 | Driver Alias(print-sysroot-headers-suffix) | |
372 | ||
373 | -profile | |
374 | Common Alias(p) | |
375 | ||
376 | -save-temps | |
377 | Driver Alias(save-temps) | |
378 | ||
379 | -shared | |
5460e1fc | 380 | Driver Alias(shared) |
e200444e JM |
381 | |
382 | -specs | |
383 | Driver Separate Alias(specs=) | |
384 | ||
385 | -specs= | |
386 | Driver Joined Alias(specs=) | |
387 | ||
388 | -static | |
389 | Driver Alias(static) | |
390 | ||
391 | -symbolic | |
392 | Driver Alias(symbolic) | |
393 | ||
d185d268 | 394 | -target-help |
603349bf | 395 | Common Driver |
c662432e NC |
396 | Alias for --help=target |
397 | ||
e200444e JM |
398 | -time |
399 | Driver Alias(time) | |
400 | ||
401 | -verbose | |
402 | Driver Alias(v) | |
403 | ||
404 | ;; The driver used to convert options such as --help into forms such | |
405 | ;; as -fhelp; the following four entries are for compatibility with | |
406 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 407 | fhelp |
e200444e | 408 | Common Driver Alias(-help) |
c662432e NC |
409 | |
410 | fhelp= | |
e200444e | 411 | Common Driver Joined Alias(-help=) |
c662432e NC |
412 | |
413 | ftarget-help | |
e200444e | 414 | Common Driver Alias(-target-help) |
c662432e | 415 | |
41fd0f9b | 416 | fversion |
e200444e | 417 | Common Driver Alias(-version) |
41fd0f9b | 418 | |
c662432e NC |
419 | -param |
420 | Common Separate | |
421 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 | 422 | |
e200444e JM |
423 | -param= |
424 | Common Joined Alias(-param) | |
425 | ||
426 | -sysroot | |
427 | Driver Separate Alias(-sysroot=) | |
428 | ||
603349bf JM |
429 | -sysroot= |
430 | Driver JoinedOrMissing | |
431 | ||
d185d268 | 432 | -version |
603349bf JM |
433 | Common Driver |
434 | ||
435 | B | |
436 | Driver Joined Separate | |
437 | ||
438 | E | |
439 | Driver | |
d185d268 | 440 | |
d9d16a19 JM |
441 | L |
442 | Driver Joined Separate | |
443 | ||
dd9f93dc JM |
444 | N |
445 | Driver | |
446 | ||
903caebf | 447 | O |
ab442df7 | 448 | Common JoinedOrMissing Optimization |
cf03fd63 | 449 | -O<number> Set optimization level to <number> |
903caebf NB |
450 | |
451 | Os | |
ab442df7 | 452 | Common Optimization |
cf03fd63 | 453 | Optimize for space rather than speed |
903caebf | 454 | |
be6d3f0e RG |
455 | Ofast |
456 | Common Optimization | |
457 | Optimize for speed disregarding exact standards compliance | |
458 | ||
bf7a7185 RG |
459 | Og |
460 | Common Optimization | |
461 | Optimize for debugging experience rather than speed or size | |
462 | ||
dd9f93dc JM |
463 | Q |
464 | Driver | |
465 | ||
466 | Qn | |
467 | Driver Negative(Qy) | |
468 | ||
469 | Qy | |
470 | Driver Negative(Qn) | |
471 | ||
6d721f67 JM |
472 | R |
473 | Driver Joined Separate | |
474 | ||
603349bf JM |
475 | S |
476 | Driver | |
477 | ||
6d721f67 JM |
478 | T |
479 | Driver Joined Separate | |
480 | ||
481 | Tbss | |
482 | Driver Separate | |
483 | ||
e69d7376 JM |
484 | Tbss= |
485 | Driver Joined | |
486 | ||
6d721f67 JM |
487 | Tdata |
488 | Driver Separate | |
489 | ||
e69d7376 JM |
490 | Tdata= |
491 | Driver Joined | |
492 | ||
6d721f67 JM |
493 | Ttext |
494 | Driver Separate | |
495 | ||
e69d7376 JM |
496 | Ttext= |
497 | Driver Joined | |
498 | ||
903caebf | 499 | W |
5de8299c | 500 | Common RejectNegative Warning Alias(Wextra) |
28786366 | 501 | This switch is deprecated; use -Wextra instead |
903caebf | 502 | |
603349bf JM |
503 | Wa, |
504 | Driver JoinedOrMissing | |
505 | ||
506 | Wl, | |
507 | Driver JoinedOrMissing | |
508 | ||
509 | Wp, | |
510 | Driver JoinedOrMissing | |
511 | ||
e01cc6dc | 512 | Waggregate-return |
c662432e | 513 | Common Var(warn_aggregate_return) Warning |
28786366 | 514 | Warn about returning structures, unions or arrays |
e01cc6dc | 515 | |
fbd28bc3 JJ |
516 | Waggressive-loop-optimizations |
517 | Common Var(warn_aggressive_loop_optimizations) Init(1) Warning | |
518 | Warn if a loop with constant number of iterations triggers undefined behavior | |
519 | ||
590b1f2d | 520 | Warray-bounds |
21af5cdf | 521 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
522 | Warn if an array is accessed out of bounds |
523 | ||
5c498b10 | 524 | Wattributes |
c662432e | 525 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
526 | Warn about inappropriate attribute usage |
527 | ||
e01cc6dc | 528 | Wcast-align |
c662432e | 529 | Common Var(warn_cast_align) Warning |
28786366 | 530 | Warn about pointer casts which increase alignment |
e01cc6dc | 531 | |
87cf0651 SB |
532 | Wcpp |
533 | Common Var(warn_cpp) Init(1) Warning | |
534 | Warn when a #warning directive is encountered | |
535 | ||
e01cc6dc | 536 | Wdeprecated-declarations |
c662432e | 537 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 538 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
539 | |
540 | Wdisabled-optimization | |
c662432e | 541 | Common Var(warn_disabled_optimization) Warning |
28786366 | 542 | Warn when an optimization pass is disabled |
e01cc6dc NB |
543 | |
544 | Werror | |
50431bc4 | 545 | Common Var(warnings_are_errors) |
28786366 | 546 | Treat all warnings as errors |
e01cc6dc | 547 | |
79cf5994 DD |
548 | Werror= |
549 | Common Joined | |
550 | Treat specified warning as error | |
551 | ||
903caebf | 552 | Wextra |
62a67c94 | 553 | Common Var(extra_warnings) Warning |
cf03fd63 | 554 | Print extra (possibly unwanted) warnings |
903caebf | 555 | |
c65a01af | 556 | Wfatal-errors |
50431bc4 | 557 | Common Var(flag_fatal_errors) |
c65a01af RG |
558 | Exit on the first error occurred |
559 | ||
a214518f SP |
560 | Wframe-larger-than= |
561 | Common RejectNegative Joined UInteger | |
f94e1d66 | 562 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 563 | |
a3a704a4 MH |
564 | Wfree-nonheap-object |
565 | Common Var(warn_free_nonheap_object) Init(1) Warning | |
566 | Warn when attempting to free a non-heap object | |
567 | ||
e01cc6dc | 568 | Winline |
c662432e | 569 | Common Var(warn_inline) Warning |
28786366 | 570 | Warn when an inlined function cannot be inlined |
e01cc6dc | 571 | |
86951993 AM |
572 | Winvalid-memory-model |
573 | Common Var(warn_invalid_memory_model) Init(1) Warning | |
574 | Warn when an atomic memory model parameter is known to be outside the valid range. | |
575 | ||
e01cc6dc | 576 | Wlarger-than- |
5de8299c | 577 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
578 | |
579 | Wlarger-than= | |
580 | Common RejectNegative Joined UInteger Warning | |
581 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 582 | |
f9cc1a70 | 583 | Wunsafe-loop-optimizations |
c662432e | 584 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
585 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
586 | ||
e01cc6dc | 587 | Wmissing-noreturn |
94ee6979 | 588 | Common Alias(Wsuggest-attribute=noreturn) |
e01cc6dc | 589 | |
c59f7203 | 590 | Wodr |
a0fd3373 | 591 | Common Var(warn_odr_violations) Init(1) Warning |
c59f7203 JH |
592 | Warn about some C++ One Definition Rule violations during link time optimization |
593 | ||
71834ad3 | 594 | Woverflow |
c662432e | 595 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
596 | Warn about overflow in arithmetic expressions |
597 | ||
e01cc6dc | 598 | Wpacked |
c662432e | 599 | Common Var(warn_packed) Warning |
28786366 | 600 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
601 | |
602 | Wpadded | |
c662432e | 603 | Common Var(warn_padded) Warning |
28786366 | 604 | Warn when padding is required to align structure members |
e01cc6dc | 605 | |
c1771a20 | 606 | Wpedantic |
2b71f4a4 | 607 | Common Var(pedantic) Init(0) Warning |
c1771a20 MLI |
608 | Issue warnings needed for strict compliance to the standard |
609 | ||
b4dfdc11 MG |
610 | Wreturn-local-addr |
611 | Common Var(warn_return_local_addr) Init(1) Warning | |
612 | Warn about returning a pointer/reference to a local or temporary variable. | |
613 | ||
e01cc6dc | 614 | Wshadow |
c662432e | 615 | Common Var(warn_shadow) Warning |
28786366 | 616 | Warn when one local variable shadows another |
e01cc6dc | 617 | |
7d69de61 | 618 | Wstack-protector |
c662432e | 619 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
620 | Warn when not issuing stack smashing protection for some reason |
621 | ||
a11e0df4 EB |
622 | Wstack-usage= |
623 | Common Joined RejectNegative UInteger Var(warn_stack_usage) Init(-1) Warning | |
624 | Warn if stack usage might be larger than specified amount | |
625 | ||
e01cc6dc | 626 | Wstrict-aliasing |
c662432e | 627 | Common Warning |
28786366 | 628 | Warn about code which might break strict aliasing rules |
e01cc6dc | 629 | |
5399d643 | 630 | Wstrict-aliasing= |
65d4f2cd | 631 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning |
5399d643 JW |
632 | Warn about code which might break strict aliasing rules |
633 | ||
6ac01510 | 634 | Wstrict-overflow |
21af5cdf | 635 | Common Warning |
6ac01510 ILT |
636 | Warn about optimizations that assume that signed overflow is undefined |
637 | ||
638 | Wstrict-overflow= | |
65d4f2cd | 639 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning |
6ac01510 ILT |
640 | Warn about optimizations that assume that signed overflow is undefined |
641 | ||
5dc16b19 MLI |
642 | Wsuggest-attribute=const |
643 | Common Var(warn_suggest_attribute_const) Warning | |
644 | Warn about functions which might be candidates for __attribute__((const)) | |
645 | ||
646 | Wsuggest-attribute=pure | |
647 | Common Var(warn_suggest_attribute_pure) Warning | |
648 | Warn about functions which might be candidates for __attribute__((pure)) | |
649 | ||
7ea6b6cf JH |
650 | Wsuggest-attribute=noreturn |
651 | Common Var(warn_suggest_attribute_noreturn) Warning | |
652 | Warn about functions which might be candidates for __attribute__((noreturn)) | |
653 | ||
91bc34a9 JH |
654 | Wsuggest-final-types |
655 | Common Var(warn_suggest_final_types) Warning | |
656 | Warn about C++ polymorphic types where adding final keyword would improve code quality | |
657 | ||
658 | Wsuggest-final-methods | |
659 | Common Var(warn_suggest_final_methods) Warning | |
660 | Warn about C++ virtual methods where adding final keyword would improve code quality | |
661 | ||
e01cc6dc | 662 | Wsystem-headers |
c662432e | 663 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 664 | Do not suppress warnings from system headers |
e01cc6dc | 665 | |
8ffadef9 MG |
666 | Wtrampolines |
667 | Common Var(warn_trampolines) Warning | |
668 | Warn whenever a trampoline is generated | |
669 | ||
faebccf9 | 670 | Wtype-limits |
95744782 | 671 | Common Var(warn_type_limits) Warning EnabledBy(Wextra) |
faebccf9 DN |
672 | Warn if a comparison is always true or always false due to the limited range of the data type |
673 | ||
e01cc6dc | 674 | Wuninitialized |
7d5a5747 | 675 | Common Var(warn_uninitialized) Warning EnabledBy(Wextra) |
28786366 | 676 | Warn about uninitialized automatic variables |
e01cc6dc | 677 | |
2f964ad6 | 678 | Wmaybe-uninitialized |
7d5a5747 | 679 | Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) |
2f964ad6 XDL |
680 | Warn about maybe uninitialized automatic variables |
681 | ||
e01cc6dc | 682 | Wunreachable-code |
2d2bd949 | 683 | Common Ignore |
bc3c12a2 | 684 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 685 | |
903caebf | 686 | Wunused |
e73f7547 | 687 | Common Var(warn_unused) Init(0) Warning |
cf03fd63 | 688 | Enable all -Wunused- warnings |
903caebf | 689 | |
ebfbbdc5 | 690 | Wunused-but-set-parameter |
d919140b | 691 | Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) |
ebfbbdc5 JJ |
692 | Warn when a function parameter is only set, otherwise unused |
693 | ||
694 | Wunused-but-set-variable | |
7d5a5747 | 695 | Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) |
ebfbbdc5 JJ |
696 | Warn when a variable is only set, otherwise unused |
697 | ||
e01cc6dc | 698 | Wunused-function |
7d5a5747 | 699 | Common Var(warn_unused_function) Warning EnabledBy(Wunused) |
28786366 | 700 | Warn when a function is unused |
e01cc6dc NB |
701 | |
702 | Wunused-label | |
7d5a5747 | 703 | Common Var(warn_unused_label) Warning EnabledBy(Wunused) |
28786366 | 704 | Warn when a label is unused |
e01cc6dc NB |
705 | |
706 | Wunused-parameter | |
d919140b | 707 | Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) |
28786366 | 708 | Warn when a function parameter is unused |
e01cc6dc NB |
709 | |
710 | Wunused-value | |
7d5a5747 | 711 | Common Var(warn_unused_value) Warning EnabledBy(Wunused) |
28786366 | 712 | Warn when an expression value is unused |
e01cc6dc NB |
713 | |
714 | Wunused-variable | |
7d5a5747 | 715 | Common Var(warn_unused_variable) Warning EnabledBy(Wunused) |
28786366 | 716 | Warn when a variable is unused |
e01cc6dc | 717 | |
16c1c158 | 718 | Wcoverage-mismatch |
650cfcab NV |
719 | Common Var(warn_coverage_mismatch) Init(1) Warning |
720 | Warn in case profiles in -fprofile-use do not match | |
16c1c158 | 721 | |
cdbb5ba3 AS |
722 | Wvector-operation-performance |
723 | Common Var(warn_vector_operation_performance) Warning | |
724 | Warn when a vector operation is compiled outside the SIMD | |
725 | ||
603349bf JM |
726 | Xassembler |
727 | Driver Separate | |
728 | ||
729 | Xlinker | |
730 | Driver Separate | |
731 | ||
732 | Xpreprocessor | |
733 | Driver Separate | |
734 | ||
dd9f93dc JM |
735 | Z |
736 | Driver | |
737 | ||
d185d268 | 738 | aux-info |
d5478783 | 739 | Common Separate Var(aux_info_file_name) |
cf03fd63 | 740 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
741 | |
742 | aux-info= | |
5de8299c | 743 | Common Joined Alias(aux-info) |
d185d268 NB |
744 | |
745 | auxbase | |
d5478783 | 746 | Common Separate RejectDriver Var(aux_base_name) |
d185d268 NB |
747 | |
748 | auxbase-strip | |
603349bf JM |
749 | Common Separate RejectDriver |
750 | ||
e200444e JM |
751 | coverage |
752 | Driver | |
753 | ||
603349bf JM |
754 | c |
755 | Driver | |
d185d268 NB |
756 | |
757 | d | |
758 | Common Joined | |
cf03fd63 | 759 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
760 | |
761 | dumpbase | |
d5478783 | 762 | Common Separate Var(dump_base_name) |
cf03fd63 | 763 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 764 | |
d7fb0a6d | 765 | dumpdir |
d5478783 | 766 | Common Separate Var(dump_dir_name) |
316fc112 | 767 | -dumpdir <dir> Set the directory name to be used for dumps |
d7fb0a6d | 768 | |
603349bf JM |
769 | dumpmachine |
770 | Driver | |
771 | ||
772 | dumpspecs | |
773 | Driver | |
774 | ||
775 | dumpversion | |
776 | Driver | |
777 | ||
e200444e JM |
778 | e |
779 | Driver Joined Separate | |
780 | ||
fa381cb2 JM |
781 | ; This option has historically been passed down to the linker by an |
782 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
783 | ; as a single option. The supported option for this purpose is | |
784 | ; -rdynamic. See PR 47390. | |
785 | export-dynamic | |
786 | Driver Undocumented | |
787 | ||
31b66477 KC |
788 | ; The version of the C++ ABI in use. The following values are allowed: |
789 | ; | |
790 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
791 | ; specification. This ABI may change as bugs are discovered and fixed. | |
792 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
793 | ; versions of G++. | |
794 | ; | |
90d84934 | 795 | ; 1: The version of the ABI first used in G++ 3.2. No longer selectable. |
31b66477 | 796 | ; |
abfe01ce JM |
797 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
798 | ; | |
799 | ; 3: The version of the ABI that fixes the missing underscore | |
800 | ; in template non-type arguments of pointer type. | |
801 | ; | |
802 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
55af847f | 803 | ; vector types. First selectable in G++ 4.5. |
99a8d35b | 804 | ; |
67e18edb | 805 | ; 5: The version of the ABI that ignores attribute const/noreturn |
55af847f | 806 | ; in function pointer mangling, and corrects mangling of decltype and |
67e18edb | 807 | ; function parameters used in other parameters and the return type. |
55af847f | 808 | ; First selectable in G++ 4.6. |
67e18edb | 809 | ; |
4b6aaa99 JM |
810 | ; 6: The version of the ABI that doesn't promote scoped enums to int and |
811 | ; changes the mangling of template argument packs, const/static_cast, | |
812 | ; prefix ++ and --, and a class scope function used as a template | |
813 | ; argument. | |
967444bb JM |
814 | ; First selectable in G++ 4.7. |
815 | ; | |
622aac0b JM |
816 | ; 7: The version of the ABI that treats nullptr_t as a builtin type and |
817 | ; corrects the mangling of lambdas in default argument scope. | |
a3ddb738 | 818 | ; First selectable in G++ 4.8. |
0861bec8 JM |
819 | ; |
820 | ; 8: The version of the ABI that corrects the substitution behavior of | |
821 | ; function types with function-cv-qualifiers. | |
822 | ; First selectable in G++ 4.9. | |
823 | ; | |
31b66477 KC |
824 | ; Additional positive integers will be assigned as new versions of |
825 | ; the ABI become the default version of the ABI. | |
57782ad8 | 826 | fabi-version= |
ca0e51a0 JM |
827 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0) |
828 | The version of the C++ ABI in use | |
57782ad8 | 829 | |
6e616110 RB |
830 | faggressive-loop-optimizations |
831 | Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1) | |
832 | Aggressively optimize loops using language constraints | |
833 | ||
6ff3a151 | 834 | falign-functions |
ab442df7 | 835 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 836 | Align the start of functions |
6ff3a151 | 837 | |
058de654 | 838 | falign-functions= |
d5478783 | 839 | Common RejectNegative Joined UInteger Var(align_functions) |
058de654 | 840 | |
6ff3a151 | 841 | falign-jumps |
ab442df7 | 842 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 843 | Align labels which are only reached by jumping |
6ff3a151 | 844 | |
058de654 | 845 | falign-jumps= |
d5478783 | 846 | Common RejectNegative Joined UInteger Var(align_jumps) |
058de654 | 847 | |
6ff3a151 | 848 | falign-labels |
ab442df7 | 849 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 850 | Align all labels |
6ff3a151 | 851 | |
058de654 | 852 | falign-labels= |
d5478783 | 853 | Common RejectNegative Joined UInteger Var(align_labels) |
058de654 | 854 | |
6ff3a151 | 855 | falign-loops |
3020190e | 856 | Common Report Var(align_loops,0) Optimization UInteger |
f3fdaec4 | 857 | Align the start of loops |
6ff3a151 | 858 | |
058de654 | 859 | falign-loops= |
d5478783 | 860 | Common RejectNegative Joined UInteger Var(align_loops) |
058de654 | 861 | |
6ff3a151 | 862 | fargument-alias |
2d2bd949 | 863 | Common Ignore |
0d3c82d6 | 864 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
865 | |
866 | fargument-noalias | |
2d2bd949 | 867 | Common Ignore |
0d3c82d6 | 868 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
869 | |
870 | fargument-noalias-global | |
2d2bd949 | 871 | Common Ignore |
0d3c82d6 | 872 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 873 | |
0698a1d2 | 874 | fargument-noalias-anything |
2d2bd949 | 875 | Common Ignore |
0d3c82d6 | 876 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 877 | |
de5a5fa1 MP |
878 | fsanitize= |
879 | Common Driver Report Joined | |
880 | Select what to sanitize | |
32b4b7f5 | 881 | |
1c33c9b7 JJ |
882 | fsanitize-recover |
883 | Common Report Var(flag_sanitize_recover) Init(1) | |
884 | After diagnosing undefined behavior attempt to continue execution | |
885 | ||
886 | fsanitize-undefined-trap-on-error | |
887 | Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0) | |
888 | Use trap instead of a library function for undefined behavior sanitization | |
889 | ||
6ff3a151 | 890 | fasynchronous-unwind-tables |
c662432e | 891 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 892 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 893 | |
6fb5fa3c DB |
894 | fauto-inc-dec |
895 | Common Report Var(flag_auto_inc_dec) Init(1) | |
896 | Generate auto-inc/dec instructions | |
897 | ||
31b66477 KC |
898 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
899 | ; For C, C++ and ObjC: defaults off. | |
900 | ; For Java: defaults to on. | |
901 | ; For Fortran: defaults to off. | |
6ff3a151 | 902 | fbounds-check |
50431bc4 | 903 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 904 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
905 | |
906 | fbranch-count-reg | |
14379e66 | 907 | Common Report Var(flag_branch_on_count_reg) Optimization |
f3fdaec4 | 908 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
909 | |
910 | fbranch-probabilities | |
c662432e | 911 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 912 | Use profiling information for branch probabilities |
6ff3a151 | 913 | |
de32c0cb | 914 | fbranch-target-load-optimize |
c662432e | 915 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 916 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
917 | |
918 | fbranch-target-load-optimize2 | |
c662432e | 919 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 920 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 921 | |
1194fc79 | 922 | fbtr-bb-exclusive |
c662432e | 923 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
924 | Restrict target load migration not to re-use registers in any basic block |
925 | ||
058de654 | 926 | fcall-saved- |
21bf1558 | 927 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 928 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
929 | |
930 | fcall-used- | |
21bf1558 | 931 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 932 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 933 | |
31b66477 KC |
934 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
935 | ; be saved across function calls, if that produces overall better code. | |
936 | ; Optional now, so people can test it. | |
de32c0cb | 937 | fcaller-saves |
c662432e | 938 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 939 | Save registers around function calls |
de32c0cb | 940 | |
3d8864c0 SP |
941 | fcheck-data-deps |
942 | Common Report Var(flag_check_data_deps) | |
943 | Compare the results of several data dependence analyzers. | |
944 | ||
2284b034 MG |
945 | fcheck-new |
946 | Common Var(flag_check_new) | |
947 | Check the return value of new in C++ | |
948 | ||
ccaeeafe NC |
949 | fcombine-stack-adjustments |
950 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
951 | Looks for opportunities to reduce stack adjustments and stack references. | |
952 | ||
6ff3a151 | 953 | fcommon |
c662432e | 954 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 955 | Do not put uninitialized globals in the common section |
6ff3a151 | 956 | |
603349bf JM |
957 | fcompare-debug |
958 | Driver | |
959 | ; Converted by the driver to -fcompare-debug= options. | |
960 | ||
2153915d | 961 | fcompare-debug= |
603349bf | 962 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
f94e1d66 | 963 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
964 | |
965 | fcompare-debug-second | |
5e471ea6 | 966 | Common Driver RejectNegative Var(flag_compare_debug) |
2153915d AO |
967 | Run only the second compilation of -fcompare-debug |
968 | ||
e692f276 RH |
969 | fcompare-elim |
970 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
971 | Perform comparison elimination after register allocation has finished | |
972 | ||
b5b8b0ac AO |
973 | fconserve-stack |
974 | Common Var(flag_conserve_stack) Optimization | |
975 | Do not perform optimizations increasing noticeably stack usage | |
976 | ||
6ff3a151 | 977 | fcprop-registers |
c662432e | 978 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 979 | Perform a register copy-propagation optimization pass |
6ff3a151 | 980 | |
de32c0cb | 981 | fcrossjumping |
c662432e | 982 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 983 | Perform cross-jumping optimization |
de32c0cb NB |
984 | |
985 | fcse-follow-jumps | |
c662432e | 986 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 987 | When running CSE, follow jumps to their targets |
de32c0cb NB |
988 | |
989 | fcse-skip-blocks | |
2d2bd949 | 990 | Common Ignore |
5f39ad47 | 991 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 992 | |
c7463669 | 993 | fcx-limited-range |
5e46b0c6 | 994 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
c7463669 RH |
995 | Omit range reduction step when performing complex division |
996 | ||
35085f76 JB |
997 | fcx-fortran-rules |
998 | Common Report Var(flag_cx_fortran_rules) Optimization | |
999 | Complex multiplication and division follow Fortran rules | |
1000 | ||
6ff3a151 | 1001 | fdata-sections |
c662432e | 1002 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 1003 | Place data items into their own section |
6ff3a151 | 1004 | |
0a090f42 | 1005 | fdbg-cnt-list |
299404a1 | 1006 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
1007 | List all available debugging counters with their limits and counts. |
1008 | ||
6fb5fa3c | 1009 | fdbg-cnt= |
299404a1 | 1010 | Common RejectNegative Joined Var(common_deferred_options) Defer |
f94e1d66 | 1011 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 1012 | |
c8aea42c | 1013 | fdebug-prefix-map= |
299404a1 | 1014 | Common Joined RejectNegative Var(common_deferred_options) Defer |
c8aea42c PB |
1015 | Map one directory name to another in debug information |
1016 | ||
76f9db36 | 1017 | fdebug-types-section |
98095aa3 | 1018 | Common Report Var(flag_debug_types_section) Init(0) |
76f9db36 JJ |
1019 | Output .debug_types section when using DWARF v4 debuginfo. |
1020 | ||
31b66477 KC |
1021 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
1022 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 1023 | fdefer-pop |
c662432e | 1024 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 1025 | Defer popping functions args from stack until later |
de32c0cb NB |
1026 | |
1027 | fdelayed-branch | |
c662432e | 1028 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 1029 | Attempt to fill delay slots of branch instructions |
de32c0cb | 1030 | |
2da02156 EB |
1031 | fdelete-dead-exceptions |
1032 | Common Report Var(flag_delete_dead_exceptions) Init(0) | |
1033 | Delete dead instructions that may throw exceptions | |
1034 | ||
de32c0cb | 1035 | fdelete-null-pointer-checks |
1ad2f450 | 1036 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 1037 | Delete useless null pointer checks |
de32c0cb | 1038 | |
bbc9396b JH |
1039 | fdevirtualize-speculatively |
1040 | Common Report Var(flag_devirtualize_speculatively) Optimization | |
1041 | Perform speculative devirtualization | |
1042 | ||
ca1eedf6 JH |
1043 | fdevirtualize |
1044 | Common Report Var(flag_devirtualize) Optimization | |
1045 | Try to convert virtual calls to direct ones. | |
1046 | ||
de32c0cb | 1047 | fdiagnostics-show-location= |
e6d4b984 | 1048 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
cf03fd63 | 1049 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 1050 | |
e6d4b984 JM |
1051 | ; Required for these enum values. |
1052 | SourceInclude | |
1053 | pretty-print.h | |
1054 | ||
1055 | Enum | |
1056 | Name(diagnostic_prefixing_rule) Type(int) | |
1057 | ||
1058 | EnumValue | |
1059 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1060 | ||
1061 | EnumValue | |
1062 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1063 | ||
9fec0042 MLI |
1064 | fdiagnostics-show-caret |
1065 | Common Var(flag_diagnostics_show_caret) Init(1) | |
1066 | Show the source line with a caret indicating the column | |
1067 | ||
4b84d650 JJ |
1068 | fdiagnostics-color |
1069 | Common Alias(fdiagnostics-color=,always,never) | |
1070 | ; | |
1071 | ||
1072 | fdiagnostics-color= | |
a2e836b2 | 1073 | Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) |
4b84d650 JJ |
1074 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics |
1075 | ||
1076 | ; Required for these enum values. | |
1077 | SourceInclude | |
1078 | diagnostic-color.h | |
1079 | ||
1080 | Enum | |
1081 | Name(diagnostic_color_rule) Type(int) | |
1082 | ||
1083 | EnumValue | |
1084 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1085 | ||
1086 | EnumValue | |
1087 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1088 | ||
1089 | EnumValue | |
1090 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1091 | ||
ccf08a6e | 1092 | fdiagnostics-show-option |
c7d0de89 | 1093 | Common Var(flag_diagnostics_show_option) Init(1) |
c85ce869 | 1094 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 1095 | |
226c52aa XDL |
1096 | fdisable- |
1097 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1098 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass | |
1099 | ||
1100 | fenable- | |
1101 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1102 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass | |
1103 | ||
6de9cd9a | 1104 | fdump- |
21bf1558 | 1105 | Common Joined RejectNegative Var(common_deferred_options) Defer |
6de9cd9a DN |
1106 | -fdump-<type> Dump various compiler internals to a file |
1107 | ||
d1583032 JM |
1108 | fdump-final-insns |
1109 | Driver RejectNegative | |
1110 | ||
2153915d AO |
1111 | fdump-final-insns= |
1112 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
1113 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
1114 | ||
c6a13190 ILT |
1115 | fdump-go-spec= |
1116 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
1117 | -fdump-go-spec=filename Write all declarations to file as Go code | |
1118 | ||
24a7799e R |
1119 | fdump-noaddr |
1120 | Common Report Var(flag_dump_noaddr) | |
1121 | Suppress output of addresses in debugging dumps | |
1122 | ||
dc10fd96 JJ |
1123 | freport-bug |
1124 | Common Driver Var(flag_report_bug) | |
1125 | Collect and dump debug information into temporary file if ICE in C/C++ | |
1126 | compiler occured. | |
1127 | ||
deced1e2 XDL |
1128 | fdump-passes |
1129 | Common Var(flag_dump_passes) Init(0) | |
1130 | Dump optimization passes | |
1131 | ||
6ff3a151 | 1132 | fdump-unnumbered |
e90afde6 | 1133 | Common Report Var(flag_dump_unnumbered) |
24a7799e | 1134 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 1135 | |
2aa7c49b | 1136 | fdump-unnumbered-links |
e90afde6 | 1137 | Common Report Var(flag_dump_unnumbered_links) |
2aa7c49b AO |
1138 | Suppress output of previous and next insn numbers in debugging dumps |
1139 | ||
b5b8b0ac AO |
1140 | fdwarf2-cfi-asm |
1141 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
1142 | Enable CFI tables via GAS assembler directives. | |
1143 | ||
355866de | 1144 | fearly-inlining |
c662432e | 1145 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
1146 | Perform early inlining |
1147 | ||
de32c0cb | 1148 | feliminate-dwarf2-dups |
50431bc4 | 1149 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 1150 | Perform DWARF2 duplicate elimination |
de32c0cb | 1151 | |
07ffa034 MJ |
1152 | fipa-sra |
1153 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
1154 | Perform interprocedural reduction of aggregates | |
1155 | ||
6a08f7b3 | 1156 | feliminate-unused-debug-symbols |
50431bc4 | 1157 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 1158 | Perform unused type elimination in debug info |
6a08f7b3 | 1159 | |
de32c0cb | 1160 | feliminate-unused-debug-types |
50431bc4 | 1161 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 1162 | Perform unused type elimination in debug info |
de32c0cb | 1163 | |
e713adf6 | 1164 | femit-class-debug-always |
eae8e474 | 1165 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1166 | Do not suppress C++ class debug information. |
1167 | ||
6ff3a151 | 1168 | fexceptions |
c662432e | 1169 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 1170 | Enable exception handling |
6ff3a151 | 1171 | |
de32c0cb | 1172 | fexpensive-optimizations |
c662432e | 1173 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 1174 | Perform a number of minor, expensive optimizations |
de32c0cb | 1175 | |
8ce94e44 | 1176 | fexcess-precision= |
e6d4b984 | 1177 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) |
8ce94e44 JM |
1178 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision |
1179 | ||
e6d4b984 JM |
1180 | Enum |
1181 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1182 | ||
1183 | EnumValue | |
1184 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1185 | ||
1186 | EnumValue | |
1187 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1188 | ||
058de654 NB |
1189 | ffast-math |
1190 | Common | |
1191 | ||
cc8547a7 | 1192 | ffat-lto-objects |
e9f67e62 | 1193 | Common Var(flag_fat_lto_objects) |
cc8547a7 AK |
1194 | Output lto objects containing both the intermediate language and binary output. |
1195 | ||
6ff3a151 | 1196 | ffinite-math-only |
5e46b0c6 | 1197 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
f3fdaec4 | 1198 | Assume no NaNs or infinities are generated |
6ff3a151 | 1199 | |
058de654 | 1200 | ffixed- |
21bf1558 | 1201 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1202 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 1203 | |
de32c0cb | 1204 | ffloat-store |
c662432e | 1205 | Common Report Var(flag_float_store) Optimization |
31b66477 | 1206 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
1207 | |
1208 | fforce-addr | |
2d2bd949 | 1209 | Common Ignore |
3de5e93a | 1210 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1211 | |
2ca2b607 SB |
1212 | fforward-propagate |
1213 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
1214 | Perform a forward propagation pass on RTL |
1215 | ||
16949072 | 1216 | ffp-contract= |
e6d4b984 | 1217 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) |
16949072 RG |
1218 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
1219 | ||
e6d4b984 JM |
1220 | Enum |
1221 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1222 | ||
1223 | EnumValue | |
1224 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1225 | ||
1226 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1227 | EnumValue | |
1228 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1229 | ||
1230 | EnumValue | |
1231 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1232 | ||
31b66477 KC |
1233 | ; Nonzero means don't put addresses of constant functions in registers. |
1234 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1235 | ; done on the assembly output. | |
de32c0cb | 1236 | ffunction-cse |
50431bc4 | 1237 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 1238 | Allow function addresses to be held in registers |
de32c0cb | 1239 | |
6ff3a151 | 1240 | ffunction-sections |
50431bc4 | 1241 | Common Report Var(flag_function_sections) |
f3fdaec4 | 1242 | Place each function into its own section |
6ff3a151 | 1243 | |
de32c0cb | 1244 | fgcse |
c662432e | 1245 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 1246 | Perform global common subexpression elimination |
de32c0cb NB |
1247 | |
1248 | fgcse-lm | |
c662432e | 1249 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 1250 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
1251 | |
1252 | fgcse-sm | |
c662432e | 1253 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 1254 | Perform store motion after global common subexpression elimination |
de32c0cb | 1255 | |
f5f2e3cd | 1256 | fgcse-las |
c662432e | 1257 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
1258 | Perform redundant load after store elimination in global common subexpression |
1259 | elimination | |
1260 | ||
1261 | fgcse-after-reload | |
c662432e | 1262 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 1263 | Perform global common subexpression elimination after register allocation |
c85ce869 | 1264 | has finished |
f5f2e3cd | 1265 | |
d0a58904 | 1266 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
1267 | fgraphite |
1268 | Common Report Var(flag_graphite) | |
1269 | Enable in and out of Graphite representation | |
1270 | ||
204b560f SP |
1271 | fgraphite-identity |
1272 | Common Report Var(flag_graphite_identity) Optimization | |
1273 | Enable Graphite Identity transformation | |
f6cc3103 RG |
1274 | |
1275 | fgraphite-code-generator= | |
b860c92e | 1276 | Common Report RejectNegative Joined Optimization Enum(fgraphite_generator) Var(flag_graphite_code_gen) Init(FGRAPHITE_CODE_GEN_ISL) |
f6cc3103 RG |
1277 | Choose code generator of Graphite |
1278 | ||
1279 | Enum | |
1280 | Name(fgraphite_generator) Type(enum fgraphite_generator) UnknownError(unknown code generator of graphite %qs) | |
1281 | ||
1282 | EnumValue | |
1283 | Enum(fgraphite_generator) String(isl) Value(FGRAPHITE_CODE_GEN_ISL) | |
1284 | ||
1285 | EnumValue | |
1286 | Enum(fgraphite_generator) String(cloog) Value(FGRAPHITE_CODE_GEN_CLOOG) | |
204b560f | 1287 | |
372a6eb8 BS |
1288 | fhoist-adjacent-loads |
1289 | Common Report Var(flag_hoist_adjacent_loads) Optimization | |
1290 | Enable hoisting adjacent loads to encourage generating conditional move | |
1291 | instructions | |
1292 | ||
3cf0e270 SP |
1293 | floop-parallelize-all |
1294 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
1295 | Mark all loops as parallel |
1296 | ||
f8bf9252 SP |
1297 | floop-strip-mine |
1298 | Common Report Var(flag_loop_strip_mine) Optimization | |
1299 | Enable Loop Strip Mining transformation | |
1300 | ||
1301 | floop-interchange | |
1302 | Common Report Var(flag_loop_interchange) Optimization | |
1303 | Enable Loop Interchange transformation | |
1304 | ||
1305 | floop-block | |
1306 | Common Report Var(flag_loop_block) Optimization | |
1307 | Enable Loop Blocking transformation | |
1308 | ||
0a35513e AH |
1309 | fgnu-tm |
1310 | Common Report Var(flag_tm) | |
1311 | Enable support for GNU transactional memory | |
1312 | ||
da34ade5 JM |
1313 | fgnu-unique |
1314 | Common Report Var(flag_gnu_unique) Init(1) | |
1315 | Use STB_GNU_UNIQUE if supported by the assembler | |
1316 | ||
98af4c9f | 1317 | floop-flatten |
093193be MK |
1318 | Common Ignore |
1319 | Does nothing. Preserved for backward compatibility. | |
98af4c9f | 1320 | |
b60cc080 TG |
1321 | floop-nest-optimize |
1322 | Common Report Var(flag_loop_optimize_isl) Optimization | |
1323 | Enable the ISL based loop nest optimizer | |
1324 | ||
6a78b724 DD |
1325 | fstrict-volatile-bitfields |
1326 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
1327 | Force bitfield accesses to match their type width | |
1328 | ||
6ff3a151 | 1329 | fguess-branch-probability |
c662432e | 1330 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 1331 | Enable guessing of branch probabilities |
6ff3a151 | 1332 | |
31b66477 KC |
1333 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1334 | ; Generate position-independent code for executables if possible | |
1335 | ; On SVR4 targets, it also controls whether or not to emit a | |
1336 | ; string identifying the compiler. | |
6ff3a151 | 1337 | fident |
50431bc4 | 1338 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 1339 | Process #ident directives |
6ff3a151 | 1340 | |
de32c0cb | 1341 | fif-conversion |
c662432e | 1342 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 1343 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
1344 | |
1345 | fif-conversion2 | |
c662432e | 1346 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 1347 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 1348 | |
87e2a8fd XDL |
1349 | fstack-reuse= |
1350 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) | |
1351 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. | |
1352 | ||
1353 | Enum | |
1354 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1355 | ||
1356 | EnumValue | |
1357 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1358 | ||
1359 | EnumValue | |
1360 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1361 | ||
1362 | EnumValue | |
1363 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1364 | ||
384a5197 SP |
1365 | ftree-loop-if-convert |
1366 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1367 | Convert conditional jumps in innermost loops to branchless equivalents | |
1368 | ||
bd544141 SP |
1369 | ftree-loop-if-convert-stores |
1370 | Common Report Var(flag_tree_loop_if_convert_stores) Optimization | |
1371 | Also if-convert conditional jumps containing memory writes | |
1372 | ||
31b66477 KC |
1373 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1374 | ; This is used only for compiling crtstuff.c, | |
1375 | ; and it may be extended to other effects | |
1376 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1377 | finhibit-size-directive |
50431bc4 | 1378 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 1379 | Do not generate .size directives |
6ff3a151 | 1380 | |
3e293154 MJ |
1381 | findirect-inlining |
1382 | Common Report Var(flag_indirect_inlining) | |
1383 | Perform indirect inlining | |
1384 | ||
99ea07f8 RG |
1385 | ; General flag to enable inlining. Specifying -fno-inline will disable |
1386 | ; all inlining apart from always-inline functions. | |
de32c0cb | 1387 | finline |
0f042bc5 | 1388 | Common Report Var(flag_no_inline,0) Init(0) Optimization |
99ea07f8 | 1389 | Enable inlining of function declared \"inline\", disabling disables all inlining |
de32c0cb | 1390 | |
4d4b8cb9 JH |
1391 | finline-small-functions |
1392 | Common Report Var(flag_inline_small_functions) Optimization | |
99ea07f8 | 1393 | Integrate functions into their callers when code size is known not to grow |
4d4b8cb9 | 1394 | |
de32c0cb | 1395 | finline-functions |
c662432e | 1396 | Common Report Var(flag_inline_functions) Optimization |
99ea07f8 | 1397 | Integrate functions not declared \"inline\" into their callers when profitable |
de32c0cb | 1398 | |
355866de | 1399 | finline-functions-called-once |
fb37c1de | 1400 | Common Report Var(flag_inline_functions_called_once) Optimization |
99ea07f8 | 1401 | Integrate functions only required by their single caller |
d63db217 | 1402 | |
d302c9d6 | 1403 | finline-limit- |
5de8299c | 1404 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1405 | |
1406 | finline-limit= | |
1407 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1408 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 1409 | |
86951993 AM |
1410 | finline-atomics |
1411 | Common Report Var(flag_inline_atomics) Init(1) Optimization | |
1412 | Inline __atomic operations when a lock free instruction sequence is available. | |
1413 | ||
6ff3a151 | 1414 | finstrument-functions |
50431bc4 | 1415 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 1416 | Instrument function entry and exit with profiling calls |
6ff3a151 | 1417 | |
8d5a7d1f ILT |
1418 | finstrument-functions-exclude-function-list= |
1419 | Common RejectNegative Joined | |
1420 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
1421 | ||
1422 | finstrument-functions-exclude-file-list= | |
1423 | Common RejectNegative Joined | |
1424 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
1425 | ||
d6e14e8f | 1426 | fipa-cp |
c662432e | 1427 | Common Report Var(flag_ipa_cp) Optimization |
bbc9396b | 1428 | Perform interprocedural constant propagation |
d6e14e8f | 1429 | |
5e45130d JH |
1430 | fipa-cp-clone |
1431 | Common Report Var(flag_ipa_cp_clone) Optimization | |
1432 | Perform cloning to make Interprocedural constant propagation stronger | |
1433 | ||
e65bb9be JH |
1434 | fipa-profile |
1435 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
1436 | Perform interprocedural profile propagation | |
ea900239 | 1437 | |
4cf4d6a3 | 1438 | fipa-pta |
c662432e | 1439 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
1440 | Perform interprocedural points-to analysis |
1441 | ||
e65bb9be JH |
1442 | fipa-pure-const |
1443 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
1444 | Discover pure and const functions | |
1445 | ||
ea900239 | 1446 | fipa-reference |
c662432e | 1447 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
1448 | Discover readonly and non addressable static variables |
1449 | ||
43d861a5 | 1450 | fipa-matrix-reorg |
04f92ff4 RG |
1451 | Common Ignore |
1452 | Does nothing. Preserved for backward compatibility. | |
43d861a5 | 1453 | |
e1dc98b2 | 1454 | fipa-struct-reorg |
b8beb4d1 RG |
1455 | Common Ignore |
1456 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1457 | |
058e97ec | 1458 | fira-algorithm= |
e6d4b984 | 1459 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) |
7db7ed3c VM |
1460 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
1461 | ||
e6d4b984 JM |
1462 | Enum |
1463 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1464 | ||
1465 | EnumValue | |
1466 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1467 | ||
1468 | EnumValue | |
1469 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1470 | ||
7db7ed3c | 1471 | fira-region= |
ffe8727f | 1472 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) |
7db7ed3c | 1473 | -fira-region=[one|all|mixed] Set regions for IRA |
058e97ec | 1474 | |
e6d4b984 JM |
1475 | Enum |
1476 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1477 | ||
1478 | EnumValue | |
1479 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1480 | ||
1481 | EnumValue | |
1482 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1483 | ||
1484 | EnumValue | |
1485 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1486 | ||
b11f0116 BC |
1487 | fira-hoist-pressure |
1488 | Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization | |
1489 | Use IRA based register pressure calculation | |
1490 | in RTL hoist optimizations. | |
1491 | ||
1833192f | 1492 | fira-loop-pressure |
f3d83ffe | 1493 | Common Report Var(flag_ira_loop_pressure) Optimization |
1833192f VM |
1494 | Use IRA based register pressure calculation |
1495 | in RTL loop optimizations. | |
1496 | ||
058e97ec VM |
1497 | fira-share-save-slots |
1498 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
1499 | Share slots for saving different hard registers. | |
1500 | ||
1501 | fira-share-spill-slots | |
1502 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
1503 | Share stack slots for spilled pseudo-registers. | |
1504 | ||
1505 | fira-verbose= | |
5498f011 | 1506 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1507 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1508 | |
8b11a64c | 1509 | fivopts |
c662432e | 1510 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
1511 | Optimize induction variables on trees |
1512 | ||
82c0180d | 1513 | fjump-tables |
c662432e | 1514 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
1515 | Use jump tables for sufficiently large switch statements |
1516 | ||
de32c0cb | 1517 | fkeep-inline-functions |
50431bc4 | 1518 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 1519 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
1520 | |
1521 | fkeep-static-consts | |
50431bc4 | 1522 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 1523 | Emit static const variables even if they are not used |
de32c0cb | 1524 | |
6ff3a151 | 1525 | fleading-underscore |
50431bc4 | 1526 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 1527 | Give external symbols a leading underscore |
6ff3a151 | 1528 | |
efa1cdf0 | 1529 | floop-optimize |
2d2bd949 | 1530 | Common Ignore |
c0220ea4 | 1531 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1532 | |
d7f09764 | 1533 | flto |
014d92e1 | 1534 | Common |
d7f09764 DN |
1535 | Enable link-time optimization. |
1536 | ||
014d92e1 JH |
1537 | flto= |
1538 | Common RejectNegative Joined Var(flag_lto) | |
1539 | Link-time optimization with number of parallel jobs or jobserver. | |
1540 | ||
783dab6b RB |
1541 | Enum |
1542 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
852e4bd2 | 1543 | |
783dab6b RB |
1544 | EnumValue |
1545 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
852e4bd2 | 1546 | |
783dab6b RB |
1547 | EnumValue |
1548 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
1549 | ||
1550 | EnumValue | |
1551 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
1552 | ||
1553 | EnumValue | |
1554 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
1555 | ||
1556 | EnumValue | |
1557 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
c3c445e1 | 1558 | |
783dab6b RB |
1559 | flto-partition= |
1560 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
1561 | Specify the algorithm to partition symbols and vars at linktime | |
014d92e1 | 1562 | |
d7f09764 DN |
1563 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1564 | flto-compression-level= | |
fcfbd84e | 1565 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
f94e1d66 | 1566 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 | 1567 | |
1ee85ee1 JH |
1568 | flto-odr-type-merging |
1569 | Common Report Var(flag_lto_odr_type_mering) Init(1) | |
1570 | Merge C++ types using One Definition Rule | |
1571 | ||
d7f09764 | 1572 | flto-report |
1d67dde8 | 1573 | Common Report Var(flag_lto_report) Init(0) |
d7f09764 DN |
1574 | Report various link-time optimization statistics |
1575 | ||
057f8f20 AK |
1576 | flto-report-wpa |
1577 | Common Report Var(flag_lto_report_wpa) Init(0) | |
1578 | Report various link-time optimization statistics for WPA only | |
1579 | ||
6ff3a151 | 1580 | fmath-errno |
5e46b0c6 | 1581 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1582 | Set errno after built-in math functions |
6ff3a151 | 1583 | |
3a789837 NF |
1584 | fmax-errors= |
1585 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
1586 | -fmax-errors=<number> Maximum number of errors to report | |
1587 | ||
6ff3a151 | 1588 | fmem-report |
50431bc4 | 1589 | Common Report Var(mem_report) |
f3fdaec4 | 1590 | Report on permanent memory allocation |
6ff3a151 | 1591 | |
b3e44629 AK |
1592 | fmem-report-wpa |
1593 | Common Report Var(mem_report_wpa) | |
1594 | Report on permanent memory allocation in WPA only | |
1595 | ||
31b66477 KC |
1596 | ; This will attempt to merge constant section constants, if 1 only |
1597 | ; string constants and constants from constant pool, if 2 also constant | |
1598 | ; variables. | |
6ff3a151 | 1599 | fmerge-all-constants |
c662432e | 1600 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 1601 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
1602 | |
1603 | fmerge-constants | |
f0036cca | 1604 | Common Report Var(flag_merge_constants,1) Optimization |
f3fdaec4 | 1605 | Attempt to merge identical constants across compilation units |
6ff3a151 | 1606 | |
28a08168 ILT |
1607 | fmerge-debug-strings |
1608 | Common Report Var(flag_merge_debug_strings) Init(1) | |
1609 | Attempt to merge identical debug strings across compilation units | |
1610 | ||
de32c0cb NB |
1611 | fmessage-length= |
1612 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1613 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 1614 | |
e5626198 | 1615 | fmodulo-sched |
c662432e | 1616 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
1617 | Perform SMS based modulo scheduling before the first scheduling pass |
1618 | ||
517d76fa VY |
1619 | fmodulo-sched-allow-regmoves |
1620 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
1621 | Perform SMS based modulo scheduling with register moves allowed | |
1622 | ||
5e962776 | 1623 | fmove-loop-invariants |
14379e66 | 1624 | Common Report Var(flag_move_loop_invariants) Optimization |
5e962776 ZD |
1625 | Move loop invariant computations out of loops |
1626 | ||
6fb5fa3c | 1627 | fdce |
6ae4be32 | 1628 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
1629 | Use the RTL dead code elimination pass |
1630 | ||
1631 | fdse | |
6ae4be32 | 1632 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
1633 | Use the RTL dead store elimination pass |
1634 | ||
d72372e4 | 1635 | freschedule-modulo-scheduled-loops |
c662432e | 1636 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
1637 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
1638 | ||
6ff3a151 | 1639 | fnon-call-exceptions |
c662432e | 1640 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 1641 | Support synchronous non-call exceptions |
6ff3a151 | 1642 | |
de32c0cb | 1643 | fomit-frame-pointer |
c662432e | 1644 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 1645 | When possible do not generate stack frames |
de32c0cb | 1646 | |
78c60e3d SS |
1647 | fopt-info |
1648 | Common Report Var(flag_opt_info) Optimization | |
1649 | Enable all optimization info dumps on stderr | |
1650 | ||
1651 | fopt-info- | |
1652 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1653 | -fopt-info[-<type>=filename] Dump compiler optimization details | |
1654 | ||
6ff3a151 | 1655 | foptimize-register-move |
3b6d1699 VM |
1656 | Common Ignore |
1657 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1658 | |
de32c0cb | 1659 | foptimize-sibling-calls |
c662432e | 1660 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 1661 | Optimize sibling and tail recursive calls |
de32c0cb | 1662 | |
3e485f62 JH |
1663 | fpartial-inlining |
1664 | Common Report Var(flag_partial_inlining) | |
1665 | Perform partial inlining | |
1666 | ||
a5573239 JH |
1667 | fpre-ipa-mem-report |
1668 | Common Report Var(pre_ipa_mem_report) | |
1669 | Report on memory allocation before interprocedural optimization | |
1670 | ||
1671 | fpost-ipa-mem-report | |
1672 | Common Report Var(post_ipa_mem_report) | |
1673 | Report on memory allocation before interprocedural optimization | |
1674 | ||
6ff3a151 | 1675 | fpack-struct |
c662432e | 1676 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 1677 | Pack structure members together without holes |
6ff3a151 | 1678 | |
467cecf3 | 1679 | fpack-struct= |
c662432e | 1680 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
1681 | -fpack-struct=<number> Set initial maximum structure member alignment |
1682 | ||
de32c0cb | 1683 | fpcc-struct-return |
5498f011 | 1684 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
f3fdaec4 | 1685 | Return small aggregates in memory, not registers |
de32c0cb NB |
1686 | |
1687 | fpeel-loops | |
c662432e | 1688 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 1689 | Perform loop peeling |
de32c0cb NB |
1690 | |
1691 | fpeephole | |
c662432e | 1692 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 1693 | Enable machine specific peephole optimizations |
de32c0cb | 1694 | |
6ff3a151 | 1695 | fpeephole2 |
c662432e | 1696 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 1697 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 1698 | |
31b66477 | 1699 | fPIC |
da0aa2cc | 1700 | Common Report Var(flag_pic,2) Negative(fPIE) |
31b66477 KC |
1701 | Generate position-independent code if possible (large mode) |
1702 | ||
1703 | fPIE | |
da0aa2cc | 1704 | Common Report Var(flag_pie,2) Negative(fpic) |
31b66477 KC |
1705 | Generate position-independent code for executables if possible (large mode) |
1706 | ||
6ff3a151 | 1707 | fpic |
da0aa2cc | 1708 | Common Report Var(flag_pic,1) Negative(fpie) |
31b66477 | 1709 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
1710 | |
1711 | fpie | |
da0aa2cc | 1712 | Common Report Var(flag_pie,1) Negative(fPIC) |
31b66477 | 1713 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 1714 | |
68a607d8 | 1715 | fplugin= |
21bf1558 | 1716 | Common Joined RejectNegative Var(common_deferred_options) Defer |
68a607d8 DN |
1717 | Specify a plugin to load |
1718 | ||
1719 | fplugin-arg- | |
21bf1558 | 1720 | Common Joined RejectNegative Var(common_deferred_options) Defer |
f94e1d66 | 1721 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 1722 | |
bbc8a8dc | 1723 | fpredictive-commoning |
6ae4be32 | 1724 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
1725 | Run predictive commoning optimization. |
1726 | ||
de32c0cb | 1727 | fprefetch-loop-arrays |
1fbb509a | 1728 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
f3fdaec4 | 1729 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 1730 | |
6ff3a151 | 1731 | fprofile |
50431bc4 | 1732 | Common Report Var(profile_flag) |
f3fdaec4 | 1733 | Enable basic program profiling code |
6ff3a151 NB |
1734 | |
1735 | fprofile-arcs | |
50431bc4 | 1736 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 1737 | Insert arc-based program profiling code |
6ff3a151 | 1738 | |
2f908293 | 1739 | fprofile-dir= |
0576d21f | 1740 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
1741 | Set the top-level directory for storing the profile data. |
1742 | The default is 'pwd'. | |
1743 | ||
52c76998 PY |
1744 | fprofile-correction |
1745 | Common Report Var(flag_profile_correction) | |
1746 | Enable correction of flow inconsistent profile data input | |
1747 | ||
a8a5f53a JH |
1748 | fprofile-generate |
1749 | Common | |
1750 | Enable common options for generating profile info for profile feedback directed optimizations | |
1751 | ||
2f908293 SP |
1752 | fprofile-generate= |
1753 | Common Joined RejectNegative | |
1754 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
1755 | ||
a8a5f53a | 1756 | fprofile-use |
2f908293 | 1757 | Common Var(flag_profile_use) |
a8a5f53a JH |
1758 | Enable common options for performing profile feedback directed optimizations |
1759 | ||
2f908293 SP |
1760 | fprofile-use= |
1761 | Common Joined RejectNegative | |
1762 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
1763 | ||
fca9dc00 | 1764 | fprofile-values |
50431bc4 | 1765 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
1766 | Insert code to profile values of expressions |
1767 | ||
37e5402b JH |
1768 | fprofile-report |
1769 | Common Report Var(profile_report) | |
1770 | Report on consistency of profile | |
1771 | ||
9cec31f4 ML |
1772 | fprofile-reorder-functions |
1773 | Common Report Var(flag_profile_reorder_functions) | |
1774 | Enable function reordering that improves code placement | |
1775 | ||
de32c0cb | 1776 | frandom-seed |
299404a1 | 1777 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
1778 | |
1779 | frandom-seed= | |
299404a1 | 1780 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1781 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 1782 | |
e0d9d0dd NC |
1783 | ; This switch causes the command line that was used to create an |
1784 | ; object file to be recorded into the object file. The exact format | |
1785 | ; of this recording is target and binary file format dependent. | |
1786 | ; It is related to the -fverbose-asm switch, but that switch only | |
1787 | ; records information in the assembler output file as comments, so | |
1788 | ; they never reach the object file. | |
1789 | frecord-gcc-switches | |
1790 | Common Report Var(flag_record_gcc_switches) | |
1791 | Record gcc command line switches in the object file. | |
1792 | ||
de32c0cb | 1793 | freg-struct-return |
f0036cca | 1794 | Common Report Var(flag_pcc_struct_return,0) Optimization |
f3fdaec4 | 1795 | Return small aggregates in registers |
de32c0cb | 1796 | |
6ff3a151 | 1797 | fregmove |
3b6d1699 VM |
1798 | Common Ignore |
1799 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1800 | |
f20f2613 VM |
1801 | flive-range-shrinkage |
1802 | Common Report Var(flag_live_range_shrinkage) Init(0) Optimization | |
1803 | Relief of register pressure through live range shrinkage | |
1804 | ||
6ff3a151 | 1805 | frename-registers |
c662432e | 1806 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 1807 | Perform a register renaming optimization pass |
6ff3a151 NB |
1808 | |
1809 | freorder-blocks | |
c662432e | 1810 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 1811 | Reorder basic blocks to improve code placement |
6ff3a151 | 1812 | |
750054a2 | 1813 | freorder-blocks-and-partition |
c662432e | 1814 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
1815 | Reorder basic blocks and partition into hot and cold sections |
1816 | ||
6ff3a151 | 1817 | freorder-functions |
c662432e | 1818 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 1819 | Reorder functions to improve code placement |
6ff3a151 | 1820 | |
de32c0cb | 1821 | frerun-cse-after-loop |
3020190e | 1822 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
f3fdaec4 | 1823 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1824 | |
efa1cdf0 | 1825 | frerun-loop-opt |
2d2bd949 | 1826 | Common Ignore |
c0220ea4 | 1827 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1828 | |
039c3d42 | 1829 | frounding-math |
5e46b0c6 | 1830 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
039c3d42 RS |
1831 | Disable optimizations that assume default FP rounding behavior |
1832 | ||
6ff3a151 | 1833 | fsched-interblock |
c662432e | 1834 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1835 | Enable scheduling across basic blocks |
6ff3a151 | 1836 | |
ce18efcb VM |
1837 | fsched-pressure |
1838 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1839 | Enable register pressure sensitive insn scheduling | |
1840 | ||
6ff3a151 | 1841 | fsched-spec |
c662432e | 1842 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1843 | Allow speculative motion of non-loads |
6ff3a151 NB |
1844 | |
1845 | fsched-spec-load | |
c662432e | 1846 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1847 | Allow speculative motion of some loads |
6ff3a151 NB |
1848 | |
1849 | fsched-spec-load-dangerous | |
c662432e | 1850 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1851 | Allow speculative motion of more loads |
6ff3a151 | 1852 | |
de32c0cb | 1853 | fsched-verbose= |
299404a1 | 1854 | Common RejectNegative Joined UInteger Var(sched_verbose_param) |
cf03fd63 | 1855 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1856 | |
6ff3a151 | 1857 | fsched2-use-superblocks |
c662432e | 1858 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1859 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1860 | |
1861 | fsched2-use-traces | |
2d2bd949 | 1862 | Common Ignore |
57257f0d | 1863 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1864 | |
de32c0cb | 1865 | fschedule-insns |
c662432e | 1866 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1867 | Reschedule instructions before register allocation |
de32c0cb NB |
1868 | |
1869 | fschedule-insns2 | |
c662432e | 1870 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1871 | Reschedule instructions after register allocation |
de32c0cb | 1872 | |
e855c69d AB |
1873 | ; This flag should be on when a target implements non-trivial |
1874 | ; scheduling hooks, maybe saving some information for its own sake. | |
1875 | ; On IA64, for example, this is used for correct bundling. | |
1876 | fselective-scheduling | |
1877 | Common Report Var(flag_selective_scheduling) Optimization | |
1878 | Schedule instructions using selective scheduling algorithm | |
1879 | ||
1880 | fselective-scheduling2 | |
1881 | Common Report Var(flag_selective_scheduling2) Optimization | |
1882 | Run selective scheduling after reload | |
1883 | ||
1884 | fsel-sched-pipelining | |
1885 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1886 | Perform software pipelining of inner loops during selective scheduling | |
1887 | ||
1888 | fsel-sched-pipelining-outer-loops | |
1889 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1890 | Perform software pipelining of outer loops during selective scheduling | |
1891 | ||
1892 | fsel-sched-reschedule-pipelined | |
1893 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1894 | Reschedule pipelined regions without pipelining | |
1895 | ||
e288a46c JH |
1896 | fsemantic-interposition |
1897 | Common Report Var(flag_semantic_interposition) Init(1) | |
1898 | Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker | |
1899 | ||
31b66477 KC |
1900 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1901 | ; of stalled insns into the ready list. | |
569fa502 | 1902 | fsched-stalled-insns |
ab442df7 | 1903 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1904 | Allow premature scheduling of queued insns |
1905 | ||
1906 | fsched-stalled-insns= | |
c22cacf3 | 1907 | Common RejectNegative Joined UInteger |
4e994432 | 1908 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1909 | |
31b66477 KC |
1910 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1911 | ; be examined for a dependency on a stalled insn that is candidate for | |
1912 | ; premature removal from the queue of stalled insns into the ready list (has | |
1913 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1914 | fsched-stalled-insns-dep |
ab442df7 | 1915 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1916 | Set dependence distance checking in premature scheduling of queued insns |
1917 | ||
1918 | fsched-stalled-insns-dep= | |
1919 | Common RejectNegative Joined UInteger | |
4e994432 | 1920 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1921 | |
ee4764a8 GS |
1922 | fsched-group-heuristic |
1923 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1924 | Enable the group heuristic in the scheduler | |
1925 | ||
1926 | fsched-critical-path-heuristic | |
1927 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1928 | Enable the critical path heuristic in the scheduler | |
1929 | ||
1930 | fsched-spec-insn-heuristic | |
1931 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1932 | Enable the speculative instruction heuristic in the scheduler | |
1933 | ||
ee4764a8 GS |
1934 | fsched-rank-heuristic |
1935 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1936 | Enable the rank heuristic in the scheduler | |
1937 | ||
1938 | fsched-last-insn-heuristic | |
1939 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1940 | Enable the last instruction heuristic in the scheduler | |
1941 | ||
1942 | fsched-dep-count-heuristic | |
1943 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1944 | Enable the dependent count heuristic in the scheduler | |
1945 | ||
aacd3885 | 1946 | fsection-anchors |
c662432e | 1947 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
1948 | Access data in the same section from shared anchor points |
1949 | ||
8cd37d0b | 1950 | fsee |
2d2bd949 | 1951 | Common Ignore |
8393a9c8 | 1952 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 1953 | |
87a0ebfd | 1954 | fzee |
26cd9add EI |
1955 | Common Ignore |
1956 | Does nothing. Preserved for backward compatibility. | |
1957 | ||
1958 | free | |
1959 | Common Report Var(flag_ree) Init(0) | |
1960 | Turn on Redundant Extensions Elimination pass. | |
87a0ebfd | 1961 | |
8abb6b22 | 1962 | fshow-column |
1cb42611 | 1963 | Common Report Var(flag_show_column) Init(1) |
e74fe492 | 1964 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 1965 | |
484db665 BS |
1966 | fshrink-wrap |
1967 | Common Report Var(flag_shrink_wrap) Optimization | |
1968 | Emit function prologues only before parts of the function that need it, | |
1969 | rather than at the top of the function. | |
1970 | ||
6ff3a151 | 1971 | fsignaling-nans |
5e46b0c6 | 1972 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
f3fdaec4 | 1973 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 1974 | |
db02da79 | 1975 | fsigned-zeros |
5e46b0c6 | 1976 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
db02da79 RS |
1977 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1978 | ||
6ff3a151 | 1979 | fsingle-precision-constant |
c662432e | 1980 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 1981 | Convert floating point constants to single precision constants |
6ff3a151 | 1982 | |
113d659a | 1983 | fsplit-ivs-in-unroller |
c662432e | 1984 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 1985 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 1986 | |
7458026b ILT |
1987 | fsplit-stack |
1988 | Common Report Var(flag_split_stack) Init(-1) | |
1989 | Generate discontiguous stack frames | |
1990 | ||
e53a16e7 | 1991 | fsplit-wide-types |
21af5cdf | 1992 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
1993 | Split wide types into independent registers |
1994 | ||
68f6df73 RB |
1995 | fssa-phiopt |
1996 | Common Report Var(flag_ssa_phiopt) Optimization | |
1997 | Optimize conditional patterns using SSA PHI nodes | |
1998 | ||
f37a4f14 | 1999 | fvariable-expansion-in-unroller |
c662432e | 2000 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 2001 | Apply variable expansion when loops are unrolled |
f37a4f14 | 2002 | |
b38f3813 EB |
2003 | fstack-check= |
2004 | Common Report RejectNegative Joined | |
2005 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
2006 | ||
6ff3a151 | 2007 | fstack-check |
5de8299c | 2008 | Common Alias(fstack-check=, specific, no) |
b38f3813 | 2009 | Insert stack checking code into the program. Same as -fstack-check=specific |
6ff3a151 | 2010 | |
de32c0cb | 2011 | fstack-limit |
21bf1558 | 2012 | Common Var(common_deferred_options) Defer |
de32c0cb | 2013 | |
058de654 | 2014 | fstack-limit-register= |
21bf1558 | 2015 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 2016 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
2017 | |
2018 | fstack-limit-symbol= | |
21bf1558 | 2019 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 2020 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 2021 | |
7d69de61 RH |
2022 | fstack-protector |
2023 | Common Report Var(flag_stack_protect, 1) | |
2024 | Use propolice as a stack protection method | |
2025 | ||
2026 | fstack-protector-all | |
f0036cca | 2027 | Common Report RejectNegative Var(flag_stack_protect, 2) |
7d69de61 RH |
2028 | Use a stack protection method for every function |
2029 | ||
f6bc1c4a HS |
2030 | fstack-protector-strong |
2031 | Common Report RejectNegative Var(flag_stack_protect, 3) | |
2032 | Use a smart stack protection method for certain functions | |
2033 | ||
d3c12306 EB |
2034 | fstack-usage |
2035 | Common RejectNegative Var(flag_stack_usage) | |
2036 | Output stack usage information on a per-function basis | |
2037 | ||
de32c0cb | 2038 | fstrength-reduce |
2d2bd949 | 2039 | Common Ignore |
c0220ea4 | 2040 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 2041 | |
31b66477 KC |
2042 | ; Nonzero if we should do (language-dependent) alias analysis. |
2043 | ; Typically, this analysis will assume that expressions of certain | |
2044 | ; types do not alias expressions of certain other types. Only used | |
2045 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 2046 | fstrict-aliasing |
c662432e | 2047 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 2048 | Assume strict aliasing rules apply |
6ff3a151 | 2049 | |
eeef0e45 ILT |
2050 | fstrict-overflow |
2051 | Common Report Var(flag_strict_overflow) | |
2052 | Treat signed overflow as undefined | |
2053 | ||
e8053cf5 RH |
2054 | fsync-libcalls |
2055 | Common Report Var(flag_sync_libcalls) Init(1) | |
2056 | Implement __atomic operations via libcalls to legacy __sync functions | |
2057 | ||
de32c0cb | 2058 | fsyntax-only |
50431bc4 | 2059 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 2060 | Check for syntax errors, then stop |
de32c0cb | 2061 | |
6ff3a151 | 2062 | ftest-coverage |
50431bc4 | 2063 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 2064 | Create data files needed by \"gcov\" |
6ff3a151 | 2065 | |
de32c0cb | 2066 | fthread-jumps |
c662432e | 2067 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 2068 | Perform jump threading optimizations |
de32c0cb | 2069 | |
6ff3a151 | 2070 | ftime-report |
50431bc4 | 2071 | Common Report Var(time_report) |
f3fdaec4 | 2072 | Report the time taken by each compiler pass |
6ff3a151 | 2073 | |
058de654 | 2074 | ftls-model= |
e6d4b984 | 2075 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
cf03fd63 | 2076 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 2077 | |
e6d4b984 JM |
2078 | Enum |
2079 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2080 | ||
2081 | EnumValue | |
2082 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2083 | ||
2084 | EnumValue | |
2085 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2086 | ||
2087 | EnumValue | |
2088 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2089 | ||
2090 | EnumValue | |
2091 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2092 | ||
474eccc6 | 2093 | ftoplevel-reorder |
d6cc6ec9 | 2094 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
2095 | Reorder top level functions, variables, and asms |
2096 | ||
de32c0cb | 2097 | ftracer |
50431bc4 | 2098 | Common Report Var(flag_tracer) |
f3fdaec4 | 2099 | Perform superblock formation via tail duplication |
de32c0cb | 2100 | |
31b66477 KC |
2101 | ; Zero means that floating-point math operations cannot generate a |
2102 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2103 | ; IEEE 754 arithmetic. | |
6ff3a151 | 2104 | ftrapping-math |
5e46b0c6 | 2105 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 2106 | Assume floating-point operations can trap |
6ff3a151 NB |
2107 | |
2108 | ftrapv | |
c662432e | 2109 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 2110 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 2111 | |
6de9cd9a | 2112 | ftree-ccp |
c662432e | 2113 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
2114 | Enable SSA-CCP optimization on trees |
2115 | ||
0b4b14ac RG |
2116 | ftree-bit-ccp |
2117 | Common Report Var(flag_tree_bit_ccp) Optimization | |
2118 | Enable SSA-BIT-CCP optimization on trees | |
2119 | ||
0bca51f0 | 2120 | ftree-store-ccp |
2d2bd949 | 2121 | Common Ignore |
dce2b2f6 | 2122 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2123 | |
6de9cd9a | 2124 | ftree-ch |
c662432e | 2125 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
2126 | Enable loop header copying on trees |
2127 | ||
21d01365 AO |
2128 | ftree-coalesce-inlined-vars |
2129 | Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization | |
2130 | Enable coalescing of copy-related user variables that are inlined | |
2131 | ||
2132 | ftree-coalesce-vars | |
2133 | Common Report Var(flag_ssa_coalesce_vars,2) Optimization | |
2134 | Enable coalescing of all copy-related user variables | |
2135 | ||
6de9cd9a | 2136 | ftree-copyrename |
c662432e | 2137 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 2138 | Replace SSA temporaries with better names in copies |
6de9cd9a | 2139 | |
0bca51f0 | 2140 | ftree-copy-prop |
c662432e | 2141 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
2142 | Enable copy propagation on trees |
2143 | ||
2144 | ftree-store-copy-prop | |
2d2bd949 | 2145 | Common Ignore |
e9033855 | 2146 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2147 | |
a5828d1e MM |
2148 | ftree-cselim |
2149 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
2150 | Transform condition stores into unconditional ones | |
2151 | ||
b6e99746 MJ |
2152 | ftree-switch-conversion |
2153 | Common Report Var(flag_tree_switch_conversion) Optimization | |
2154 | Perform conversions of switch initializations. | |
2155 | ||
6de9cd9a | 2156 | ftree-dce |
c662432e | 2157 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
2158 | Enable SSA dead code elimination optimization on trees |
2159 | ||
2160 | ftree-dominator-opts | |
c662432e | 2161 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
2162 | Enable dominator optimizations |
2163 | ||
c9e93168 TV |
2164 | ftree-tail-merge |
2165 | Common Report Var(flag_tree_tail_merge) Optimization | |
2166 | Enable tail merging on trees | |
2167 | ||
6de9cd9a | 2168 | ftree-dse |
c662432e | 2169 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
2170 | Enable dead store elimination |
2171 | ||
248fc9f3 RG |
2172 | ftree-forwprop |
2173 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
2174 | Enable forward propagation on trees | |
2175 | ||
ff2ad0f7 | 2176 | ftree-fre |
c662432e | 2177 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
2178 | Enable Full Redundancy Elimination (FRE) on trees |
2179 | ||
8b57bfeb JJ |
2180 | foptimize-strlen |
2181 | Common Report Var(flag_optimize_strlen) Optimization | |
2182 | Enable string length optimizations on trees | |
2183 | ||
ae93744d JL |
2184 | fisolate-erroneous-paths-dereference |
2185 | Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization | |
2186 | Detect paths which trigger erroneous or undefined behaviour due to | |
2187 | dereferencing a NULL pointer. Isolate those paths from the main control | |
2188 | flow and turn the statement with erroneous or undefined behaviour into a trap. | |
2189 | ||
2190 | fisolate-erroneous-paths-attribute | |
2191 | Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization | |
2192 | Detect paths which trigger erroneous or undefined behaviour due a NULL value | |
2193 | being used in a way which is forbidden by a returns_nonnull or nonnull | |
2194 | attribute. Isolate those paths from the main control flow and turn the | |
2195 | statement with erroneous or undefined behaviour into a trap. | |
8fdc414d | 2196 | |
dea61d92 | 2197 | ftree-loop-distribution |
53ed2f0e | 2198 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
2199 | Enable loop distribution on trees |
2200 | ||
20769d5e SP |
2201 | ftree-loop-distribute-patterns |
2202 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
2203 | Enable loop distribution for patterns transformed into a library call | |
2204 | ||
1b08d87d | 2205 | ftree-loop-im |
c662432e | 2206 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
2207 | Enable loop invariant motion on trees |
2208 | ||
599eabdb | 2209 | ftree-loop-linear |
7633415c SP |
2210 | Common Alias(floop-interchange) |
2211 | Enable loop interchange transforms. Same as -floop-interchange | |
599eabdb | 2212 | |
1b08d87d | 2213 | ftree-loop-ivcanon |
c662432e | 2214 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
2215 | Create canonical induction variables in loops |
2216 | ||
c66b6c66 | 2217 | ftree-loop-optimize |
c662432e | 2218 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
2219 | Enable loop optimizations on tree level |
2220 | ||
5f40b3cb | 2221 | ftree-parallelize-loops= |
fcfbd84e | 2222 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
5f40b3cb ZD |
2223 | Enable automatic parallelization of loops |
2224 | ||
248fc9f3 RG |
2225 | ftree-phiprop |
2226 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
2227 | Enable hoisting loads from conditional pointers. | |
2228 | ||
6de9cd9a | 2229 | ftree-pre |
c662432e | 2230 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
2231 | Enable SSA-PRE optimization on trees |
2232 | ||
fa06ad0d JR |
2233 | ftree-partial-pre |
2234 | Common Report Var(flag_tree_partial_pre) Optimization | |
2235 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination | |
2236 | ||
248fc9f3 | 2237 | ftree-pta |
14379e66 | 2238 | Common Report Var(flag_tree_pta) Optimization |
248fc9f3 RG |
2239 | Perform function-local points-to analysis on trees. |
2240 | ||
13c59415 UB |
2241 | ftree-reassoc |
2242 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
2243 | Enable reassociation on tree level | |
2244 | ||
c75ab022 | 2245 | ftree-salias |
2d2bd949 | 2246 | Common Ignore |
1353232d | 2247 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 2248 | |
fa555252 | 2249 | ftree-sink |
c662432e | 2250 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
2251 | Enable SSA code sinking on trees |
2252 | ||
75cfe445 BS |
2253 | ftree-slsr |
2254 | Common Report Var(flag_tree_slsr) Optimization | |
2255 | Perform straight-line strength reduction | |
2256 | ||
6de9cd9a | 2257 | ftree-sra |
c662432e | 2258 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
2259 | Perform scalar replacement of aggregates |
2260 | ||
2261 | ftree-ter | |
3020190e | 2262 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
2263 | Replace temporary expressions in the SSA->normal pass |
2264 | ||
c662432e NC |
2265 | ftree-lrs |
2266 | Common Report Var(flag_tree_live_range_split) Optimization | |
2267 | Perform live range splitting during the SSA->normal pass | |
2268 | ||
0bca51f0 | 2269 | ftree-vrp |
c662432e | 2270 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
2271 | Perform Value Range Propagation on trees |
2272 | ||
de32c0cb | 2273 | funit-at-a-time |
d6cc6ec9 | 2274 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 2275 | Compile whole compilation unit at a time |
de32c0cb NB |
2276 | |
2277 | funroll-loops | |
c662432e | 2278 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 2279 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
2280 | |
2281 | funroll-all-loops | |
c662432e | 2282 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 2283 | Perform loop unrolling for all loops |
de32c0cb | 2284 | |
f9cc1a70 PB |
2285 | ; Nonzero means that loop optimizer may assume that the induction variables |
2286 | ; that control loops do not overflow and that the loops with nontrivial | |
2287 | ; exit condition are not infinite | |
2288 | funsafe-loop-optimizations | |
c662432e | 2289 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
2290 | Allow loop optimizations to assume that the loops behave in normal way |
2291 | ||
a1a82611 | 2292 | fassociative-math |
5e46b0c6 | 2293 | Common Report Var(flag_associative_math) SetByCombined |
a1a82611 RE |
2294 | Allow optimization for floating-point arithmetic which may change the |
2295 | result of the operation due to rounding. | |
2296 | ||
2297 | freciprocal-math | |
5e46b0c6 | 2298 | Common Report Var(flag_reciprocal_math) SetByCombined |
a1a82611 RE |
2299 | Same as -fassociative-math for expressions which include division. |
2300 | ||
31b66477 KC |
2301 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2302 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2303 | ; are allowed to assume that their arguments and results are "normal" | |
2304 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2305 | funsafe-math-optimizations |
5e46b0c6 | 2306 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
f3fdaec4 | 2307 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 2308 | |
de32c0cb | 2309 | funswitch-loops |
c662432e | 2310 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 2311 | Perform loop unswitching |
de32c0cb | 2312 | |
6ff3a151 | 2313 | funwind-tables |
c662432e | 2314 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 2315 | Just generate unwind tables for exception handling |
6ff3a151 | 2316 | |
b352afba | 2317 | fuse-ld=bfd |
b78e932d | 2318 | Common Driver Negative(fuse-ld=gold) |
b352afba NC |
2319 | Use the bfd linker instead of the default linker |
2320 | ||
2321 | fuse-ld=gold | |
b78e932d | 2322 | Common Driver Negative(fuse-ld=bfd) |
b352afba NC |
2323 | Use the gold linker instead of the default linker |
2324 | ||
da18ea94 | 2325 | fuse-linker-plugin |
063d671d | 2326 | Common Undocumented Var(flag_use_linker_plugin) |
da18ea94 | 2327 | |
e90afde6 JM |
2328 | ; Positive if we should track variables, negative if we should run |
2329 | ; the var-tracking pass only to discard debug annotations, zero if | |
2330 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2331 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2332 | ; in process_options (). | |
014a1138 | 2333 | fvar-tracking |
e90afde6 | 2334 | Common Report Var(flag_var_tracking) Init(2) Optimization |
014a1138 JZ |
2335 | Perform variable tracking |
2336 | ||
e90afde6 JM |
2337 | ; Positive if we should track variables at assignments, negative if |
2338 | ; we should run the var-tracking pass only to discard debug | |
2339 | ; annotations. When flag_var_tracking_assignments == | |
2340 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2341 | fvar-tracking-assignments |
e90afde6 | 2342 | Common Report Var(flag_var_tracking_assignments) Init(2) Optimization |
b5b8b0ac AO |
2343 | Perform variable tracking by annotating assignments |
2344 | ||
e90afde6 JM |
2345 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2346 | ; processing options and computing its default. */ | |
b5b8b0ac | 2347 | fvar-tracking-assignments-toggle |
e90afde6 | 2348 | Common Report Var(flag_var_tracking_assignments_toggle) Optimization |
b5b8b0ac AO |
2349 | Toggle -fvar-tracking-assignments |
2350 | ||
1267ca30 EB |
2351 | ; Positive if we should track uninitialized variables, negative if |
2352 | ; we should run the var-tracking pass only to discard debug | |
2353 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
2354 | ; will be set according to flag_var_tracking. | |
62760ffd CT |
2355 | fvar-tracking-uninit |
2356 | Common Report Var(flag_var_tracking_uninit) Optimization | |
2357 | Perform variable tracking and also tag variables that are uninitialized | |
2358 | ||
79fe1b3b | 2359 | ftree-vectorize |
c662432e | 2360 | Common Report Var(flag_tree_vectorize) Optimization |
ea0f3e87 | 2361 | Enable vectorization on trees |
79fe1b3b | 2362 | |
78c60e3d | 2363 | ftree-vectorizer-verbose= |
477e804b SS |
2364 | Common Joined RejectNegative Ignore |
2365 | Does nothing. Preserved for backward compatibility. | |
78c60e3d | 2366 | |
ea0f3e87 XDL |
2367 | ftree-loop-vectorize |
2368 | Common Report Var(flag_tree_loop_vectorize) Optimization | |
2369 | Enable loop vectorization on trees | |
2370 | ||
a70d6342 | 2371 | ftree-slp-vectorize |
ea0f3e87 | 2372 | Common Report Var(flag_tree_slp_vectorize) Optimization |
a70d6342 IR |
2373 | Enable basic block vectorization (SLP) on trees |
2374 | ||
d6d11272 XDL |
2375 | fvect-cost-model= |
2376 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) | |
2377 | Specifies the cost model for vectorization | |
2378 | ||
8b5e1202 SO |
2379 | fsimd-cost-model= |
2380 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) | |
2381 | Specifies the vectorization cost model for code marked with a simd directive | |
2382 | ||
d6d11272 XDL |
2383 | Enum |
2384 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
2385 | ||
2386 | EnumValue | |
2387 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
2388 | ||
2389 | EnumValue | |
2390 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
2391 | ||
2392 | EnumValue | |
2393 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
2394 | ||
792ed98b | 2395 | fvect-cost-model |
d6d11272 XDL |
2396 | Common RejectNegative Alias(fvect-cost-model=,dynamic) |
2397 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. | |
2398 | ||
2399 | fno-vect-cost-model | |
2400 | Common RejectNegative Alias(fvect-cost-model=,unlimited) | |
2401 | Enables the unlimited vectorizer cost model. Preserved for backward compatibility. | |
792ed98b | 2402 | |
c12cc930 | 2403 | ftree-vect-loop-version |
d6d11272 XDL |
2404 | Common Ignore |
2405 | Does nothing. Preserved for backward compatibility. | |
c12cc930 | 2406 | |
fbf798fc | 2407 | ftree-scev-cprop |
21af5cdf | 2408 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2409 | Enable copy propagation of scalar-evolution information. |
2410 | ||
31b66477 KC |
2411 | ; -fverbose-asm causes extra commentary information to be produced in |
2412 | ; the generated assembly code (to make it more readable). This option | |
2413 | ; is generally only of use to those who actually need to read the | |
2414 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2415 | ; -fno-verbose-asm, the default, causes the extra information | |
2416 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 2417 | fverbose-asm |
50431bc4 | 2418 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 2419 | Add extra commentary to assembler output |
6ff3a151 | 2420 | |
d7afec4b | 2421 | fvisibility= |
e6d4b984 | 2422 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
d7afec4b ND |
2423 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility |
2424 | ||
e6d4b984 JM |
2425 | Enum |
2426 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
2427 | ||
2428 | EnumValue | |
2429 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
2430 | ||
2431 | EnumValue | |
2432 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
2433 | ||
2434 | EnumValue | |
2435 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
2436 | ||
2437 | EnumValue | |
2438 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 2439 | |
2077db1b CT |
2440 | fvtable-verify= |
2441 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
2442 | Validate vtable pointers before using them. | |
2443 | ||
2444 | Enum | |
2445 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
2446 | ||
2447 | EnumValue | |
2448 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
2449 | ||
2450 | EnumValue | |
2451 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
2452 | ||
2453 | EnumValue | |
2454 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
2455 | ||
2456 | fvtv-counts | |
2457 | Common Var(flag_vtv_counts) | |
2458 | Output vtable verification counters. | |
2459 | ||
2460 | fvtv-debug | |
2461 | Common Var(flag_vtv_debug) | |
2462 | Output vtable verification pointer sets information. | |
2463 | ||
fca9dc00 | 2464 | fvpt |
c662432e | 2465 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
2466 | Use expression value profiles in optimizations |
2467 | ||
62551c66 | 2468 | fweb |
c662432e | 2469 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
2470 | Construct webs and split unrelated uses of single variable |
2471 | ||
c2699190 XDL |
2472 | ftree-builtin-call-dce |
2473 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
2474 | Enable conditional dead code elimination for builtin calls | |
2475 | ||
ce91e74c | 2476 | fwhole-program |
c662432e | 2477 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
2478 | Perform whole program optimizations |
2479 | ||
6ff3a151 | 2480 | fwrapv |
c662432e | 2481 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 2482 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 2483 | |
6ff3a151 | 2484 | fzero-initialized-in-bss |
50431bc4 | 2485 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 2486 | Put zero initialized data in the bss section |
6ff3a151 | 2487 | |
e01cc6dc NB |
2488 | g |
2489 | Common JoinedOrMissing | |
df38ffef NB |
2490 | Generate debug information in default format |
2491 | ||
2492 | gcoff | |
6782438d | 2493 | Common JoinedOrMissing Negative(gdwarf) |
df38ffef NB |
2494 | Generate debug information in COFF format |
2495 | ||
6782438d SKS |
2496 | gdwarf |
2497 | Common JoinedOrMissing Negative(gdwarf-) | |
2498 | Generate debug information in default version of DWARF format | |
2499 | ||
53b2323e | 2500 | gdwarf- |
98095aa3 | 2501 | Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) |
53b2323e | 2502 | Generate debug information in DWARF v2 (or later) format |
df38ffef NB |
2503 | |
2504 | ggdb | |
2505 | Common JoinedOrMissing | |
2506 | Generate debug information in default extended format | |
2507 | ||
5175cbaf | 2508 | gno-pubnames |
7a1dd0fa | 2509 | Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) |
5175cbaf SA |
2510 | Don't generate DWARF pubnames and pubtypes sections. |
2511 | ||
2512 | gpubnames | |
7a1dd0fa | 2513 | Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) |
5175cbaf SA |
2514 | Generate DWARF pubnames and pubtypes sections. |
2515 | ||
7a1dd0fa SA |
2516 | ggnu-pubnames |
2517 | Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) | |
2518 | Generate DWARF pubnames and pubtypes sections with GNU extensions. | |
2519 | ||
e967adf4 | 2520 | gno-record-gcc-switches |
98095aa3 | 2521 | Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1) |
e967adf4 JJ |
2522 | Don't record gcc command line switches in DWARF DW_AT_producer. |
2523 | ||
2524 | grecord-gcc-switches | |
2525 | Common RejectNegative Var(dwarf_record_gcc_switches,1) | |
2526 | Record gcc command line switches in DWARF DW_AT_producer. | |
2527 | ||
99ea153e SA |
2528 | gno-split-dwarf |
2529 | Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0) | |
2530 | Don't generate debug information in separate .dwo files | |
2531 | ||
2532 | gsplit-dwarf | |
2533 | Common Driver RejectNegative Var(dwarf_split_debug_info,1) | |
2534 | Generate debug information in separate .dwo files | |
2535 | ||
df38ffef | 2536 | gstabs |
14c7833c | 2537 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
2538 | Generate debug information in STABS format |
2539 | ||
2540 | gstabs+ | |
14c7833c | 2541 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
2542 | Generate debug information in extended STABS format |
2543 | ||
65f753a0 | 2544 | gno-strict-dwarf |
98095aa3 | 2545 | Common RejectNegative Var(dwarf_strict,0) Init(0) |
65f753a0 JJ |
2546 | Emit DWARF additions beyond selected version |
2547 | ||
2548 | gstrict-dwarf | |
f0036cca | 2549 | Common Report RejectNegative Var(dwarf_strict,1) |
65f753a0 JJ |
2550 | Don't emit DWARF additions beyond selected version |
2551 | ||
2153915d AO |
2552 | gtoggle |
2553 | Common Report Var(flag_gtoggle) | |
2554 | Toggle debug information generation | |
2555 | ||
df38ffef | 2556 | gvms |
14c7833c | 2557 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
2558 | Generate debug information in VMS format |
2559 | ||
2560 | gxcoff | |
14c7833c | 2561 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
2562 | Generate debug information in XCOFF format |
2563 | ||
2564 | gxcoff+ | |
14c7833c | 2565 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 2566 | Generate debug information in extended XCOFF format |
e01cc6dc | 2567 | |
29d7cbd1 RO |
2568 | Enum |
2569 | Name(compressed_debug_sections) Type(int) | |
2570 | ||
2571 | ; Since -gz= is completely handled in specs, the values aren't used and we | |
2572 | ; assign arbitrary constants. | |
2573 | EnumValue | |
2574 | Enum(compressed_debug_sections) String(none) Value(0) | |
2575 | ||
2576 | EnumValue | |
2577 | Enum(compressed_debug_sections) String(zlib) Value(1) | |
2578 | ||
2579 | EnumValue | |
2580 | Enum(compressed_debug_sections) String(zlib-gnu) Value(2) | |
2581 | ||
2582 | gz | |
2583 | Common Driver | |
2584 | Generate compressed debug sections | |
2585 | ||
2586 | gz= | |
2587 | Common Driver Joined Enum(compressed_debug_sections) | |
2588 | -gz=<format> Generate compressed debug sections in format <format> | |
2589 | ||
6d721f67 JM |
2590 | h |
2591 | Driver Joined Separate | |
2592 | ||
4adbd5dd MK |
2593 | iplugindir= |
2594 | Common Joined Var(plugindir_string) Init(0) | |
2595 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
2596 | ||
e0cdc09f MK |
2597 | imultiarch |
2598 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
2599 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory | |
2600 | ||
603349bf JM |
2601 | l |
2602 | Driver Joined Separate | |
2603 | ||
dd9f93dc JM |
2604 | n |
2605 | Driver | |
2606 | ||
603349bf JM |
2607 | no-canonical-prefixes |
2608 | Driver | |
2609 | ||
d9d16a19 JM |
2610 | nodefaultlibs |
2611 | Driver | |
2612 | ||
bab79a40 JM |
2613 | nostartfiles |
2614 | Driver | |
2615 | ||
d9d16a19 JM |
2616 | nostdlib |
2617 | Driver | |
2618 | ||
d185d268 | 2619 | o |
d5478783 | 2620 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
cf03fd63 | 2621 | -o <file> Place output into <file> |
d185d268 NB |
2622 | |
2623 | p | |
50431bc4 | 2624 | Common Var(profile_flag) |
cf03fd63 | 2625 | Enable function profiling |
d185d268 | 2626 | |
603349bf JM |
2627 | pass-exit-codes |
2628 | Driver Var(pass_exit_codes) | |
2629 | ||
d185d268 | 2630 | pedantic |
c1771a20 | 2631 | Common Alias(Wpedantic) |
d185d268 NB |
2632 | |
2633 | pedantic-errors | |
d5478783 | 2634 | Common Var(flag_pedantic_errors) |
cf03fd63 | 2635 | Like -pedantic but issue them as errors |
d185d268 | 2636 | |
d9d16a19 JM |
2637 | pg |
2638 | Driver | |
2639 | ||
603349bf JM |
2640 | pipe |
2641 | Driver Var(use_pipes) | |
2642 | ||
2643 | print-file-name= | |
2644 | Driver JoinedOrMissing Var(print_file_name) | |
2645 | ||
2646 | print-libgcc-file-name | |
2647 | Driver | |
2648 | ||
2649 | print-multi-directory | |
2650 | Driver Var(print_multi_directory) | |
2651 | ||
2652 | print-multi-lib | |
2653 | Driver Var(print_multi_lib) | |
2654 | ||
2655 | print-multi-os-directory | |
2656 | Driver Var(print_multi_os_directory) | |
e0cdc09f MK |
2657 | |
2658 | print-multiarch | |
2659 | Driver Var(print_multiarch) | |
603349bf JM |
2660 | |
2661 | print-prog-name= | |
2662 | Driver JoinedOrMissing Var(print_prog_name) | |
2663 | ||
2664 | print-search-dirs | |
2665 | Driver Var(print_search_dirs) | |
2666 | ||
2667 | print-sysroot | |
2668 | Driver Var(print_sysroot) | |
2669 | ||
2670 | print-sysroot-headers-suffix | |
2671 | Driver Var(print_sysroot_headers_suffix) | |
2672 | ||
d7b42618 | 2673 | quiet |
603349bf | 2674 | Common Var(quiet_flag) RejectDriver |
cf03fd63 | 2675 | Do not display functions compiled or elapsed time |
d7b42618 | 2676 | |
dd9f93dc JM |
2677 | r |
2678 | Driver | |
2679 | ||
2680 | s | |
2681 | Driver | |
2682 | ||
603349bf JM |
2683 | save-temps |
2684 | Driver | |
2685 | ||
2686 | save-temps= | |
2687 | Driver Joined | |
2688 | ||
dd9f93dc JM |
2689 | t |
2690 | Driver | |
2691 | ||
603349bf JM |
2692 | time |
2693 | Driver Var(report_times) | |
2694 | ||
2695 | time= | |
2696 | Driver JoinedOrMissing | |
2697 | ||
e200444e JM |
2698 | u |
2699 | Driver Joined Separate | |
2700 | ||
5642f5d5 JM |
2701 | undef |
2702 | Driver | |
2703 | ; C option, but driver must not handle as "-u ndef". | |
2704 | ||
603349bf | 2705 | v |
d5478783 JM |
2706 | Common Driver Var(verbose_flag) |
2707 | Enable verbose output | |
603349bf | 2708 | |
d185d268 | 2709 | version |
603349bf | 2710 | Common Var(version_flag) RejectDriver |
cf03fd63 | 2711 | Display the compiler's version |
d185d268 NB |
2712 | |
2713 | w | |
50431bc4 | 2714 | Common Var(inhibit_warnings) |
cf03fd63 | 2715 | Suppress warnings |
d185d268 | 2716 | |
603349bf JM |
2717 | wrapper |
2718 | Driver Separate Var(wrapper_string) | |
2719 | ||
2720 | x | |
2721 | Driver Joined Separate | |
2722 | ||
528dc603 | 2723 | shared |
5460e1fc | 2724 | Driver RejectNegative Negative(pie) |
528dc603 L |
2725 | Create a shared library |
2726 | ||
603349bf JM |
2727 | shared-libgcc |
2728 | Driver | |
2729 | ||
2730 | specs | |
5de8299c | 2731 | Driver Separate Alias(specs=) |
603349bf JM |
2732 | |
2733 | specs= | |
2734 | Driver Joined | |
2735 | ||
d9d16a19 JM |
2736 | static |
2737 | Driver | |
2738 | ||
603349bf JM |
2739 | static-libgcc |
2740 | Driver | |
2741 | ||
2742 | static-libgfortran | |
2743 | Driver | |
2744 | ; Documented for Fortran, but always accepted by driver. | |
2745 | ||
2746 | static-libstdc++ | |
2747 | Driver | |
2748 | ||
7a938933 ILT |
2749 | static-libgo |
2750 | Driver | |
2751 | ; Documented for Go, but always accepted by driver. | |
2752 | ||
7e8d1b2d L |
2753 | static-libasan |
2754 | Driver | |
2755 | ||
32b4b7f5 DV |
2756 | static-libtsan |
2757 | Driver | |
2758 | ||
9065ada9 JJ |
2759 | static-liblsan |
2760 | Driver | |
2761 | ||
de5a5fa1 MP |
2762 | static-libubsan |
2763 | Driver | |
2764 | ||
e200444e JM |
2765 | symbolic |
2766 | Driver | |
2767 | ||
528dc603 | 2768 | pie |
5460e1fc | 2769 | Driver RejectNegative Negative(shared) |
528dc603 L |
2770 | Create a position independent executable |
2771 | ||
6d721f67 JM |
2772 | z |
2773 | Driver Joined Separate | |
2774 | ||
d996e61a RO |
2775 | fuse-caller-save |
2776 | Common Report Var(flag_use_caller_save) Optimization | |
2777 | Use caller save register across calls if possible | |
2778 | ||
d7b42618 | 2779 | ; This comment is to ensure we retain the blank line above. |