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Commit | Line | Data |
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d7b42618 | 1 | ; Options for the language- and target-independent parts of the compiler. |
50431bc4 | 2 | |
99dee823 | 3 | ; Copyright (C) 2003-2021 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 | ||
1ff9ed6f | 49 | ; This variable is set to non-0 only by LTO front-end. 1 indicates that |
46a27415 | 50 | ; the output produced will be used for incremental linking (thus weak symbols |
5b42d196 JH |
51 | ; can still be bound) and 2 indicates that the IL is going to be linked and |
52 | ; and output to LTO object file. | |
1ff9ed6f | 53 | Variable |
5b42d196 | 54 | enum incremental_link flag_incremental_link = INCREMENTAL_LINK_NONE |
1ff9ed6f | 55 | |
a75bfaa6 JM |
56 | ; 0 means straightforward implementation of complex divide acceptable. |
57 | ; 1 means wide ranges of inputs must work for complex divide. | |
58 | ; 2 means C99-like requirements for complex multiply and divide. | |
59 | Variable | |
60 | int flag_complex_method = 1 | |
61 | ||
a75bfaa6 JM |
62 | ; Language specific warning pass for unused results. |
63 | Variable | |
64 | bool flag_warn_unused_result = false | |
65 | ||
d5478783 JM |
66 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
67 | Variable | |
68 | int flag_generate_lto | |
69 | ||
f0d78df9 IV |
70 | ; Nonzero if we should write GIMPLE bytecode for offload compilation. |
71 | Variable | |
72 | int flag_generate_offload = 0 | |
73 | ||
d5478783 JM |
74 | ; Nonzero means we should be saving declaration info into a .X file. |
75 | Variable | |
76 | int flag_gen_aux_info = 0 | |
77 | ||
78 | ; Nonzero if we are compiling code for a shared library, zero for | |
79 | ; executable. | |
80 | Variable | |
81 | int flag_shlib | |
82 | ||
6a1f6c9c JM |
83 | ; These two are really VEC(char_p,heap) *. |
84 | ||
85 | Variable | |
86 | void *flag_instrument_functions_exclude_functions | |
87 | ||
88 | Variable | |
89 | void *flag_instrument_functions_exclude_files | |
90 | ||
69ccdddb JM |
91 | ; Generic structs (e.g. templates not explicitly specialized) |
92 | ; may not have a compilation unit associated with them, and so | |
93 | ; may need to be treated differently from ordinary structs. | |
94 | ; | |
95 | ; Structs only handled by reference (indirectly), will also usually | |
96 | ; not need as much debugging information. | |
97 | ||
98 | Variable | |
99 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
100 | ||
101 | Variable | |
102 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
103 | ||
0576d21f JM |
104 | ; True if we should exit after parsing options. |
105 | Variable | |
106 | bool exit_after_options | |
107 | ||
108 | ; Type(s) of debugging information we are producing (if any). See | |
109 | ; flag-types.h for the definitions of the different possible types of | |
110 | ; debugging information. | |
111 | Variable | |
112 | enum debug_info_type write_symbols = NO_DEBUG | |
113 | ||
114 | ; Level of debugging information we are producing. See flag-types.h | |
115 | ; for the definitions of the different possible levels. | |
116 | Variable | |
117 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
118 | ||
119 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
120 | ; debugging information. Currently, this only has an effect when | |
d7d5f241 | 121 | ; write_symbols is set to DBX_DEBUG or XCOFF_DEBUG. |
0576d21f JM |
122 | Variable |
123 | bool use_gnu_debug_info_extensions | |
124 | ||
299404a1 JM |
125 | ; Original value of maximum field alignment in bytes, specified via |
126 | ; -fpack-struct=<value>. | |
127 | Variable | |
128 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
129 | ||
5e471ea6 JM |
130 | ; Type of stack check. |
131 | Variable | |
132 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
133 | ||
a11e0df4 EB |
134 | ; True if stack usage information needs to be computed. |
135 | Variable | |
136 | bool flag_stack_usage_info = false | |
137 | ||
299404a1 JM |
138 | ; -dA causes debug commentary information to be produced in |
139 | ; the generated assembly code (to make it more readable). This option | |
140 | ; is generally only of use to those who actually need to read the | |
141 | ; generated assembly code (perhaps while debugging the compiler itself). | |
142 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
143 | ; to be a catchall for printing debug information in the assembler file. | |
144 | Variable | |
145 | int flag_debug_asm | |
146 | ||
6592d14b PMR |
147 | ; Balance between GNAT encodings and standard DWARF to emit. |
148 | Variable | |
149 | enum dwarf_gnat_encodings gnat_encodings = DWARF_GNAT_ENCODINGS_DEFAULT | |
150 | ||
299404a1 JM |
151 | ; -dP causes the rtl to be emitted as a comment in assembly. |
152 | Variable | |
153 | int flag_dump_rtl_in_asm | |
154 | ||
155 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
156 | Variable | |
157 | bool flag_dump_all_passed | |
158 | ||
159 | ; Other flags saying which kinds of debugging dump have been requested. | |
160 | ||
161 | Variable | |
162 | int rtl_dump_and_exit | |
163 | ||
164 | Variable | |
165 | int flag_print_asm_name | |
166 | ||
a803773f JM |
167 | ; Name of top-level original source file (what was input to cpp). |
168 | ; This comes from the #-command at the beginning of the actual input. | |
169 | ; If there isn't any there, then this is the cc1 input file name. | |
170 | Variable | |
171 | const char *main_input_filename | |
172 | ||
173 | ; Pointer to base name in main_input_filename, with directories and a | |
174 | ; single final extension removed, and the length of this base | |
175 | ; name. | |
176 | ||
177 | Variable | |
178 | const char *main_input_basename | |
179 | ||
180 | Variable | |
181 | int main_input_baselength | |
182 | ||
1dedc12d AO |
183 | ; The base name used for auxiliary output files. |
184 | ; dump_base_name minus dump_base_ext. | |
185 | ||
186 | Variable | |
187 | const char *aux_base_name | |
188 | ||
299404a1 JM |
189 | ; Which options have been printed by --help. |
190 | Variable | |
191 | char *help_printed | |
192 | ||
e6d4b984 JM |
193 | ; Which enums have been printed by --help. 0 = not printed, no |
194 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
195 | ; = printed. | |
196 | Variable | |
197 | char *help_enum_printed | |
198 | ||
299404a1 JM |
199 | ; The number of columns for --help output. |
200 | Variable | |
201 | unsigned int help_columns | |
202 | ||
203 | ; Whether this options structure has been through finish_options | |
204 | Variable | |
205 | bool flag_opts_finished | |
206 | ||
de5a5fa1 MP |
207 | ; What the sanitizer should instrument |
208 | Variable | |
209 | unsigned int flag_sanitize | |
210 | ||
d95a2703 JJ |
211 | ; What sanitizers should recover from errors |
212 | Variable | |
3bd87832 | 213 | unsigned int flag_sanitize_recover = (SANITIZE_UNDEFINED | SANITIZE_UNDEFINED_NONDEFAULT | SANITIZE_KERNEL_ADDRESS | SANITIZE_KERNEL_HWADDRESS) & ~(SANITIZE_UNREACHABLE | SANITIZE_RETURN) |
d95a2703 | 214 | |
f6e50a7d WW |
215 | ; What the coverage sanitizers should instrument |
216 | Variable | |
217 | unsigned int flag_sanitize_coverage | |
95e7bbb8 | 218 | |
91035653 JJ |
219 | ; Flag whether a prefix has been added to dump_base_name |
220 | Variable | |
221 | bool dump_base_name_prefixed = false | |
222 | ||
d10f3e90 | 223 | ; What subset of registers should be zeroed on function return |
224 | Variable | |
225 | unsigned int flag_zero_call_used_regs | |
226 | ||
603349bf JM |
227 | ### |
228 | Driver | |
229 | ||
e200444e JM |
230 | -assemble |
231 | Driver Alias(S) | |
232 | ||
233 | -compile | |
234 | Driver Alias(c) | |
235 | ||
d86c7648 ML |
236 | -completion= |
237 | Common Driver Joined Undocumented | |
238 | Provide bash completion for options starting with provided string. | |
239 | ||
e200444e JM |
240 | -coverage |
241 | Driver Alias(coverage) | |
242 | ||
243 | -debug | |
244 | Common Alias(g) | |
245 | ||
246 | -dump | |
247 | Common Separate Alias(d) | |
248 | ||
249 | -dump= | |
250 | Common Joined Alias(d) | |
251 | ||
252 | -dumpbase | |
1dedc12d AO |
253 | Driver Common Separate Alias(dumpbase) |
254 | ||
255 | -dumpbase-ext | |
256 | Driver Common Separate Alias(dumpbase-ext) | |
e200444e JM |
257 | |
258 | -dumpdir | |
1dedc12d | 259 | Driver Common Separate Alias(dumpdir) |
e200444e JM |
260 | |
261 | -entry | |
262 | Driver Separate Alias(e) | |
263 | ||
264 | -entry= | |
265 | Driver Joined Alias(e) | |
266 | ||
267 | -extra-warnings | |
268 | Common Warning Alias(Wextra) | |
269 | ||
270 | -for-assembler | |
271 | Driver Separate Alias(Xassembler) | |
272 | ||
273 | -for-assembler= | |
274 | Driver JoinedOrMissing Alias(Xassembler) | |
275 | ||
276 | -for-linker | |
277 | Driver Separate Alias(Xlinker) | |
278 | ||
279 | -for-linker= | |
280 | Driver JoinedOrMissing Alias(Xlinker) | |
281 | ||
282 | -force-link | |
283 | Driver Separate Alias(u) | |
284 | ||
285 | -force-link= | |
286 | Driver Joined Alias(u) | |
287 | ||
d185d268 | 288 | -help |
e200444e | 289 | Common Driver Var(help_flag) |
a7b2e184 | 290 | Display this information. |
d185d268 | 291 | |
c662432e | 292 | -help= |
eece52b5 | 293 | Common Driver Joined |
a7b2e184 | 294 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params. |
903caebf | 295 | |
e200444e JM |
296 | -language |
297 | Driver Separate Alias(x) | |
298 | ||
299 | -language= | |
300 | Driver Joined Alias(x) | |
301 | ||
302 | -library-directory | |
303 | Driver Separate Alias(L) | |
304 | ||
305 | -library-directory= | |
306 | Driver Joined Alias(L) | |
307 | ||
308 | -no-canonical-prefixes | |
309 | Driver Alias(no-canonical-prefixes) | |
310 | ||
311 | -no-standard-libraries | |
312 | Driver Alias(nostdlib) | |
313 | ||
28b4fc51 JM |
314 | -no-sysroot-suffix |
315 | Driver Var(no_sysroot_suffix) | |
316 | ||
e200444e JM |
317 | -no-warnings |
318 | Common Alias(w) | |
319 | ||
320 | -optimize | |
321 | Common Alias(O) | |
322 | ||
323 | -output | |
324 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
325 | ||
326 | -output= | |
327 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
328 | ||
329 | -pass-exit-codes | |
330 | Driver Alias(pass-exit-codes) | |
331 | ||
332 | -pedantic | |
c1771a20 | 333 | Common Alias(Wpedantic) |
e200444e JM |
334 | |
335 | -pedantic-errors | |
336 | Common Alias(pedantic-errors) | |
337 | ||
338 | -pie | |
5460e1fc | 339 | Driver Alias(pie) |
e200444e | 340 | |
b4fed890 L |
341 | -static-pie |
342 | Driver Alias(static-pie) | |
343 | ||
e200444e JM |
344 | -pipe |
345 | Driver Alias(pipe) | |
346 | ||
347 | -prefix | |
348 | Driver Separate Alias(B) | |
349 | ||
350 | -prefix= | |
351 | Driver JoinedOrMissing Alias(B) | |
352 | ||
353 | -preprocess | |
354 | Driver Alias(E) | |
355 | ||
356 | -print-file-name | |
357 | Driver Separate Alias(print-file-name=) | |
358 | ||
359 | -print-file-name= | |
360 | Driver JoinedOrMissing Alias(print-file-name=) | |
361 | ||
362 | -print-libgcc-file-name | |
363 | Driver Alias(print-libgcc-file-name) | |
364 | ||
365 | -print-multi-directory | |
366 | Driver Alias(print-multi-directory) | |
367 | ||
368 | -print-multi-lib | |
369 | Driver Alias(print-multi-lib) | |
370 | ||
371 | -print-multi-os-directory | |
372 | Driver Alias(print-multi-os-directory) | |
373 | ||
e0cdc09f MK |
374 | -print-multiarch |
375 | Driver Alias(print-multiarch) | |
376 | ||
e200444e JM |
377 | -print-prog-name |
378 | Driver Separate Alias(print-prog-name=) | |
379 | ||
380 | -print-prog-name= | |
381 | Driver JoinedOrMissing Alias(print-prog-name=) | |
382 | ||
383 | -print-search-dirs | |
384 | Driver Alias(print-search-dirs) | |
385 | ||
386 | -print-sysroot | |
387 | Driver Alias(print-sysroot) | |
388 | ||
389 | -print-sysroot-headers-suffix | |
390 | Driver Alias(print-sysroot-headers-suffix) | |
391 | ||
392 | -profile | |
393 | Common Alias(p) | |
394 | ||
395 | -save-temps | |
396 | Driver Alias(save-temps) | |
397 | ||
398 | -shared | |
5460e1fc | 399 | Driver Alias(shared) |
e200444e JM |
400 | |
401 | -specs | |
402 | Driver Separate Alias(specs=) | |
403 | ||
404 | -specs= | |
405 | Driver Joined Alias(specs=) | |
406 | ||
407 | -static | |
408 | Driver Alias(static) | |
409 | ||
410 | -symbolic | |
411 | Driver Alias(symbolic) | |
412 | ||
d185d268 | 413 | -target-help |
603349bf | 414 | Common Driver |
a7b2e184 | 415 | Alias for --help=target. |
c662432e | 416 | |
e200444e JM |
417 | -time |
418 | Driver Alias(time) | |
419 | ||
420 | -verbose | |
421 | Driver Alias(v) | |
422 | ||
423 | ;; The driver used to convert options such as --help into forms such | |
424 | ;; as -fhelp; the following four entries are for compatibility with | |
425 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 426 | fhelp |
e200444e | 427 | Common Driver Alias(-help) |
c662432e NC |
428 | |
429 | fhelp= | |
e200444e | 430 | Common Driver Joined Alias(-help=) |
c662432e NC |
431 | |
432 | ftarget-help | |
e200444e | 433 | Common Driver Alias(-target-help) |
c662432e | 434 | |
41fd0f9b | 435 | fversion |
e200444e | 436 | Common Driver Alias(-version) |
41fd0f9b | 437 | |
e200444e JM |
438 | -sysroot |
439 | Driver Separate Alias(-sysroot=) | |
440 | ||
603349bf JM |
441 | -sysroot= |
442 | Driver JoinedOrMissing | |
443 | ||
d185d268 | 444 | -version |
603349bf JM |
445 | Common Driver |
446 | ||
447 | B | |
448 | Driver Joined Separate | |
449 | ||
450 | E | |
451 | Driver | |
d185d268 | 452 | |
d9d16a19 JM |
453 | L |
454 | Driver Joined Separate | |
455 | ||
dd9f93dc JM |
456 | N |
457 | Driver | |
458 | ||
903caebf | 459 | O |
ab442df7 | 460 | Common JoinedOrMissing Optimization |
a7b2e184 | 461 | -O<number> Set optimization level to <number>. |
903caebf NB |
462 | |
463 | Os | |
ab442df7 | 464 | Common Optimization |
a7b2e184 | 465 | Optimize for space rather than speed. |
903caebf | 466 | |
be6d3f0e RG |
467 | Ofast |
468 | Common Optimization | |
a7b2e184 | 469 | Optimize for speed disregarding exact standards compliance. |
be6d3f0e | 470 | |
bf7a7185 RG |
471 | Og |
472 | Common Optimization | |
a7b2e184 | 473 | Optimize for debugging experience rather than speed or size. |
bf7a7185 | 474 | |
dd9f93dc JM |
475 | Q |
476 | Driver | |
477 | ||
478 | Qn | |
479 | Driver Negative(Qy) | |
480 | ||
481 | Qy | |
482 | Driver Negative(Qn) | |
483 | ||
6d721f67 JM |
484 | R |
485 | Driver Joined Separate | |
486 | ||
603349bf JM |
487 | S |
488 | Driver | |
489 | ||
6d721f67 JM |
490 | T |
491 | Driver Joined Separate | |
492 | ||
493 | Tbss | |
494 | Driver Separate | |
495 | ||
e69d7376 JM |
496 | Tbss= |
497 | Driver Joined | |
498 | ||
6d721f67 JM |
499 | Tdata |
500 | Driver Separate | |
501 | ||
e69d7376 JM |
502 | Tdata= |
503 | Driver Joined | |
504 | ||
6d721f67 JM |
505 | Ttext |
506 | Driver Separate | |
507 | ||
e69d7376 JM |
508 | Ttext= |
509 | Driver Joined | |
510 | ||
903caebf | 511 | W |
5de8299c | 512 | Common RejectNegative Warning Alias(Wextra) |
a7b2e184 | 513 | This switch is deprecated; use -Wextra instead. |
903caebf | 514 | |
603349bf | 515 | Wa, |
9ed32e27 | 516 | Driver JoinedOrMissing RejectNegative |
603349bf JM |
517 | |
518 | Wl, | |
9ed32e27 | 519 | Driver JoinedOrMissing RejectNegative |
603349bf JM |
520 | |
521 | Wp, | |
9ed32e27 | 522 | Driver JoinedOrMissing RejectNegative |
603349bf | 523 | |
e01cc6dc | 524 | Waggregate-return |
c662432e | 525 | Common Var(warn_aggregate_return) Warning |
a7b2e184 | 526 | Warn about returning structures, unions or arrays. |
e01cc6dc | 527 | |
fbd28bc3 JJ |
528 | Waggressive-loop-optimizations |
529 | Common Var(warn_aggressive_loop_optimizations) Init(1) Warning | |
a7b2e184 | 530 | Warn if a loop with constant number of iterations triggers undefined behavior. |
fbd28bc3 | 531 | |
590b1f2d | 532 | Warray-bounds |
21af5cdf | 533 | Common Var(warn_array_bounds) Warning |
a7b2e184 | 534 | Warn if an array is accessed out of bounds. |
590b1f2d | 535 | |
de1b5c17 | 536 | Warray-bounds= |
63010089 | 537 | Common Joined RejectNegative UInteger Var(warn_array_bounds) Warning IntegerRange(0, 2) |
a7b2e184 | 538 | Warn if an array is accessed out of bounds. |
de1b5c17 | 539 | |
5c498b10 | 540 | Wattributes |
c662432e | 541 | Common Var(warn_attributes) Init(1) Warning |
a7b2e184 | 542 | Warn about inappropriate attribute usage. |
5c498b10 | 543 | |
5ebfd62b BE |
544 | Wattribute-alias |
545 | Common Alias(Wattribute_alias=, 1, 0) Warning | |
d3a02ae5 | 546 | Warn about type safety and similar errors and mismatches in declarations with alias attributes. |
5ebfd62b | 547 | |
79a2c428 MS |
548 | Wattribute-alias= |
549 | Common Joined RejectNegative UInteger Var(warn_attribute_alias) Init(1) Warning IntegerRange(0, 2) | |
d3a02ae5 | 550 | Warn about type safety and similar errors and mismatches in declarations with alias attributes. |
79a2c428 | 551 | |
6902799c IL |
552 | Wcannot-profile |
553 | Common Var(warn_cannot_profile) Init(1) Warning | |
554 | Warn when profiling instrumentation was requested, but could not be applied to | |
555 | a certain function. | |
556 | ||
e01cc6dc | 557 | Wcast-align |
c662432e | 558 | Common Var(warn_cast_align) Warning |
a7b2e184 | 559 | Warn about pointer casts which increase alignment. |
e01cc6dc | 560 | |
1d933576 BE |
561 | Wcast-align=strict |
562 | Common Var(warn_cast_align,2) Warning | |
563 | Warn about pointer casts which increase alignment. | |
564 | ||
87cf0651 SB |
565 | Wcpp |
566 | Common Var(warn_cpp) Init(1) Warning | |
a7b2e184 | 567 | Warn when a #warning directive is encountered. |
87cf0651 | 568 | |
e217792b NM |
569 | Wattribute-warning |
570 | Common Var(warn_attribute_warning) Init(1) Warning | |
571 | Warn about uses of __attribute__((warning)) declarations. | |
572 | ||
99063eee RS |
573 | Wdeprecated |
574 | Common Var(warn_deprecated) Init(1) Warning | |
575 | Warn if a deprecated compiler feature, class, method, or field is used. | |
576 | ||
e01cc6dc | 577 | Wdeprecated-declarations |
c662432e | 578 | Common Var(warn_deprecated_decl) Init(1) Warning |
a7b2e184 | 579 | Warn about uses of __attribute__((deprecated)) declarations. |
e01cc6dc NB |
580 | |
581 | Wdisabled-optimization | |
c662432e | 582 | Common Var(warn_disabled_optimization) Warning |
a7b2e184 | 583 | Warn when an optimization pass is disabled. |
e01cc6dc NB |
584 | |
585 | Werror | |
50431bc4 | 586 | Common Var(warnings_are_errors) |
a7b2e184 | 587 | Treat all warnings as errors. |
e01cc6dc | 588 | |
79cf5994 DD |
589 | Werror= |
590 | Common Joined | |
a7b2e184 | 591 | Treat specified warning as error. |
79cf5994 | 592 | |
903caebf | 593 | Wextra |
62a67c94 | 594 | Common Var(extra_warnings) Warning |
a7b2e184 | 595 | Print extra (possibly unwanted) warnings. |
903caebf | 596 | |
c65a01af | 597 | Wfatal-errors |
50431bc4 | 598 | Common Var(flag_fatal_errors) |
a7b2e184 | 599 | Exit on the first error occurred. |
c65a01af | 600 | |
a214518f | 601 | Wframe-larger-than= |
00abf86c MS |
602 | Common RejectNegative Joined Host_Wide_Int ByteSize Warning Var(warn_frame_larger_than_size) Init(HOST_WIDE_INT_MAX) |
603 | -Wframe-larger-than=<byte-size> Warn if a function's stack frame requires in excess of <byte-size>. | |
a214518f | 604 | |
ae962e57 MS |
605 | Wno-frame-larger-than |
606 | Common Alias(Wframe-larger-than=,18446744073709551615EiB,none) Warning | |
607 | Disable -Wframe-larger-than= warning. Equivalent to -Wframe-larger-than=<SIZE_MAX> or larger. | |
608 | ||
a3a704a4 MH |
609 | Wfree-nonheap-object |
610 | Common Var(warn_free_nonheap_object) Init(1) Warning | |
a7b2e184 | 611 | Warn when attempting to free a non-heap object. |
a3a704a4 | 612 | |
b2b40051 | 613 | Whsa |
c56684fd MJ |
614 | Common Ignore Warning |
615 | Does nothing. Preserved for backward compatibility. | |
b2b40051 | 616 | |
81fea426 | 617 | Wimplicit-fallthrough |
70f6d5e1 JJ |
618 | Common Alias(Wimplicit-fallthrough=,3,0) Warning |
619 | ||
620 | Wimplicit-fallthrough= | |
63010089 | 621 | Common Var(warn_implicit_fallthrough) RejectNegative Joined UInteger Warning IntegerRange(0, 5) |
81fea426 MP |
622 | Warn when a switch case falls through. |
623 | ||
e01cc6dc | 624 | Winline |
a924bffb | 625 | Common Var(warn_inline) Warning Optimization |
a7b2e184 | 626 | Warn when an inlined function cannot be inlined. |
e01cc6dc | 627 | |
86951993 AM |
628 | Winvalid-memory-model |
629 | Common Var(warn_invalid_memory_model) Init(1) Warning | |
630 | Warn when an atomic memory model parameter is known to be outside the valid range. | |
631 | ||
e01cc6dc | 632 | Wlarger-than- |
5de8299c | 633 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
634 | |
635 | Wlarger-than= | |
00abf86c MS |
636 | Common RejectNegative Joined Host_Wide_Int ByteSize Warning Var(warn_larger_than_size) Init(HOST_WIDE_INT_MAX) |
637 | -Wlarger-than=<byte-size> Warn if an object's size exceeds <byte-size>. | |
e01cc6dc | 638 | |
ae962e57 MS |
639 | Wno-larger-than |
640 | Common Alias(Wlarger-than=,18446744073709551615EiB,none) Warning | |
641 | Disable -Wlarger-than= warning. Equivalent to -Wlarger-than=<SIZE_MAX> or larger. | |
642 | ||
bf14eba2 JJ |
643 | Wnonnull-compare |
644 | Var(warn_nonnull_compare) Warning | |
645 | Warn if comparing pointer parameter with nonnull attribute with NULL. | |
646 | ||
76787f70 | 647 | Wnull-dereference |
c2d89095 | 648 | Common Var(warn_null_dereference) Warning |
a7b2e184 | 649 | Warn if dereferencing a NULL pointer may lead to erroneous or undefined behavior. |
76787f70 | 650 | |
f9cc1a70 | 651 | Wunsafe-loop-optimizations |
ee79110c JJ |
652 | Common Ignore Warning |
653 | Does nothing. Preserved for backward compatibility. | |
f9cc1a70 | 654 | |
e01cc6dc | 655 | Wmissing-noreturn |
54d62f51 | 656 | Common Warning Alias(Wsuggest-attribute=noreturn) |
e01cc6dc | 657 | |
c59f7203 | 658 | Wodr |
a0fd3373 | 659 | Common Var(warn_odr_violations) Init(1) Warning |
a7b2e184 | 660 | Warn about some C++ One Definition Rule violations during link time optimization. |
c59f7203 | 661 | |
71834ad3 | 662 | Woverflow |
c662432e | 663 | Common Var(warn_overflow) Init(1) Warning |
a7b2e184 | 664 | Warn about overflow in arithmetic expressions. |
71834ad3 | 665 | |
259d29e3 JH |
666 | Wlto-type-mismatch |
667 | Common Var(warn_lto_type_mismatch) Init(1) Warning | |
a7b2e184 | 668 | During link time optimization warn about mismatched types of global declarations. |
259d29e3 | 669 | |
e01cc6dc | 670 | Wpacked |
c662432e | 671 | Common Var(warn_packed) Warning |
a7b2e184 | 672 | Warn when the packed attribute has no effect on struct layout. |
e01cc6dc NB |
673 | |
674 | Wpadded | |
c662432e | 675 | Common Var(warn_padded) Warning |
a7b2e184 | 676 | Warn when padding is required to align structure members. |
e01cc6dc | 677 | |
c1771a20 | 678 | Wpedantic |
2b71f4a4 | 679 | Common Var(pedantic) Init(0) Warning |
a7b2e184 | 680 | Issue warnings needed for strict compliance to the standard. |
c1771a20 | 681 | |
b4dfdc11 MG |
682 | Wreturn-local-addr |
683 | Common Var(warn_return_local_addr) Init(1) Warning | |
684 | Warn about returning a pointer/reference to a local or temporary variable. | |
685 | ||
e01cc6dc | 686 | Wshadow |
c662432e | 687 | Common Var(warn_shadow) Warning |
84ff4775 LCW |
688 | Warn when one variable shadows another. Same as -Wshadow=global. |
689 | ||
690 | Wshadow=global | |
691 | Common Warning Alias(Wshadow) | |
692 | Warn when one variable shadows another (globally). | |
693 | ||
694 | Wshadow=local | |
695 | Common Var(warn_shadow_local) Warning EnabledBy(Wshadow) | |
696 | Warn when one local variable shadows another local variable or parameter. | |
697 | ||
698 | Wshadow-local | |
699 | Common Warning Undocumented Alias(Wshadow=local) | |
700 | ||
701 | Wshadow=compatible-local | |
702 | Common Var(warn_shadow_compatible_local) Warning EnabledBy(Wshadow=local) | |
703 | Warn when one local variable shadows another local variable or parameter of compatible type. | |
704 | ||
705 | Wshadow-compatible-local | |
706 | Common Warning Undocumented Alias(Wshadow=compatible-local) | |
e01cc6dc | 707 | |
7d69de61 | 708 | Wstack-protector |
c662432e | 709 | Common Var(warn_stack_protect) Warning |
a7b2e184 | 710 | Warn when not issuing stack smashing protection for some reason. |
7d69de61 | 711 | |
a11e0df4 | 712 | Wstack-usage= |
00abf86c MS |
713 | Common Joined RejectNegative Host_Wide_Int ByteSize Var(warn_stack_usage) Warning Init(HOST_WIDE_INT_MAX) |
714 | -Wstack-usage=<byte-size> Warn if stack usage might exceed <byte-size>. | |
a11e0df4 | 715 | |
ae962e57 MS |
716 | Wno-stack-usage |
717 | Common Alias(Wstack-usage=,18446744073709551615EiB,none) Warning | |
718 | Disable Wstack-usage= warning. Equivalent to Wstack-usage=<SIZE_MAX> or larger. | |
719 | ||
e01cc6dc | 720 | Wstrict-aliasing |
c662432e | 721 | Common Warning |
a7b2e184 | 722 | Warn about code which might break strict aliasing rules. |
e01cc6dc | 723 | |
5399d643 | 724 | Wstrict-aliasing= |
65d4f2cd | 725 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning |
a7b2e184 | 726 | Warn about code which might break strict aliasing rules. |
5399d643 | 727 | |
6ac01510 | 728 | Wstrict-overflow |
21af5cdf | 729 | Common Warning |
a7b2e184 | 730 | Warn about optimizations that assume that signed overflow is undefined. |
6ac01510 ILT |
731 | |
732 | Wstrict-overflow= | |
65d4f2cd | 733 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning |
a7b2e184 | 734 | Warn about optimizations that assume that signed overflow is undefined. |
6ac01510 | 735 | |
12b9f3ac JH |
736 | Wsuggest-attribute=cold |
737 | Common Var(warn_suggest_attribute_cold) Warning | |
738 | Warn about functions which might be candidates for __attribute__((cold)). | |
739 | ||
5dc16b19 MLI |
740 | Wsuggest-attribute=const |
741 | Common Var(warn_suggest_attribute_const) Warning | |
a7b2e184 | 742 | Warn about functions which might be candidates for __attribute__((const)). |
5dc16b19 MLI |
743 | |
744 | Wsuggest-attribute=pure | |
745 | Common Var(warn_suggest_attribute_pure) Warning | |
a7b2e184 | 746 | Warn about functions which might be candidates for __attribute__((pure)). |
5dc16b19 | 747 | |
7ea6b6cf JH |
748 | Wsuggest-attribute=noreturn |
749 | Common Var(warn_suggest_attribute_noreturn) Warning | |
a7b2e184 | 750 | Warn about functions which might be candidates for __attribute__((noreturn)). |
7ea6b6cf | 751 | |
0fab169b PK |
752 | Wsuggest-attribute=malloc |
753 | Common Var(warn_suggest_attribute_malloc) Warning | |
754 | Warn about functions which might be candidates for __attribute__((malloc)). | |
755 | ||
91bc34a9 JH |
756 | Wsuggest-final-types |
757 | Common Var(warn_suggest_final_types) Warning | |
a7b2e184 | 758 | Warn about C++ polymorphic types where adding final keyword would improve code quality. |
91bc34a9 JH |
759 | |
760 | Wsuggest-final-methods | |
761 | Common Var(warn_suggest_final_methods) Warning | |
a7b2e184 | 762 | Warn about C++ virtual methods where adding final keyword would improve code quality. |
91bc34a9 | 763 | |
a7dc5980 MP |
764 | Wswitch-unreachable |
765 | Common Var(warn_switch_unreachable) Warning Init(1) | |
766 | Warn about statements between switch's controlling expression and the first | |
767 | case. | |
768 | ||
e01cc6dc | 769 | Wsystem-headers |
c662432e | 770 | Common Var(warn_system_headers) Warning |
a7b2e184 | 771 | Do not suppress warnings from system headers. |
e01cc6dc | 772 | |
8ffadef9 MG |
773 | Wtrampolines |
774 | Common Var(warn_trampolines) Warning | |
a7b2e184 | 775 | Warn whenever a trampoline is generated. |
8ffadef9 | 776 | |
faebccf9 | 777 | Wtype-limits |
95744782 | 778 | Common Var(warn_type_limits) Warning EnabledBy(Wextra) |
a7b2e184 | 779 | Warn if a comparison is always true or always false due to the limited range of the data type. |
faebccf9 | 780 | |
e01cc6dc | 781 | Wuninitialized |
7d5a5747 | 782 | Common Var(warn_uninitialized) Warning EnabledBy(Wextra) |
a7b2e184 | 783 | Warn about uninitialized automatic variables. |
e01cc6dc | 784 | |
2f964ad6 | 785 | Wmaybe-uninitialized |
7d5a5747 | 786 | Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) |
a7b2e184 | 787 | Warn about maybe uninitialized automatic variables. |
2f964ad6 | 788 | |
e01cc6dc | 789 | Wunreachable-code |
f1a62b6f | 790 | Common Ignore Warning |
bc3c12a2 | 791 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 792 | |
903caebf | 793 | Wunused |
e73f7547 | 794 | Common Var(warn_unused) Init(0) Warning |
a7b2e184 | 795 | Enable all -Wunused- warnings. |
903caebf | 796 | |
ebfbbdc5 | 797 | Wunused-but-set-parameter |
d919140b | 798 | Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) |
a7b2e184 | 799 | Warn when a function parameter is only set, otherwise unused. |
ebfbbdc5 JJ |
800 | |
801 | Wunused-but-set-variable | |
7d5a5747 | 802 | Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) |
a7b2e184 | 803 | Warn when a variable is only set, otherwise unused. |
ebfbbdc5 | 804 | |
e01cc6dc | 805 | Wunused-function |
7d5a5747 | 806 | Common Var(warn_unused_function) Warning EnabledBy(Wunused) |
a7b2e184 | 807 | Warn when a function is unused. |
e01cc6dc NB |
808 | |
809 | Wunused-label | |
7d5a5747 | 810 | Common Var(warn_unused_label) Warning EnabledBy(Wunused) |
a7b2e184 | 811 | Warn when a label is unused. |
e01cc6dc NB |
812 | |
813 | Wunused-parameter | |
d919140b | 814 | Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) |
a7b2e184 | 815 | Warn when a function parameter is unused. |
e01cc6dc NB |
816 | |
817 | Wunused-value | |
7d5a5747 | 818 | Common Var(warn_unused_value) Warning EnabledBy(Wunused) |
a7b2e184 | 819 | Warn when an expression value is unused. |
e01cc6dc NB |
820 | |
821 | Wunused-variable | |
7d5a5747 | 822 | Common Var(warn_unused_variable) Warning EnabledBy(Wunused) |
a7b2e184 | 823 | Warn when a variable is unused. |
e01cc6dc | 824 | |
16c1c158 | 825 | Wcoverage-mismatch |
650cfcab | 826 | Common Var(warn_coverage_mismatch) Init(1) Warning |
a7b2e184 | 827 | Warn in case profiles in -fprofile-use do not match. |
16c1c158 | 828 | |
bc162b0e IB |
829 | Wmissing-profile |
830 | Common Var(warn_missing_profile) Init(1) Warning | |
831 | Warn in case profiles in -fprofile-use do not exist. | |
832 | ||
cdbb5ba3 AS |
833 | Wvector-operation-performance |
834 | Common Var(warn_vector_operation_performance) Warning | |
a7b2e184 | 835 | Warn when a vector operation is compiled outside the SIMD. |
cdbb5ba3 | 836 | |
8833eab4 ML |
837 | Wtsan |
838 | Common Var(warn_tsan) Init(1) Warning | |
839 | Warn about unsupported features in ThreadSanitizer. | |
840 | ||
603349bf JM |
841 | Xassembler |
842 | Driver Separate | |
843 | ||
844 | Xlinker | |
845 | Driver Separate | |
846 | ||
847 | Xpreprocessor | |
848 | Driver Separate | |
849 | ||
dd9f93dc JM |
850 | Z |
851 | Driver | |
852 | ||
d185d268 | 853 | aux-info |
d5478783 | 854 | Common Separate Var(aux_info_file_name) |
a7b2e184 | 855 | -aux-info <file> Emit declaration information into <file>. |
d185d268 NB |
856 | |
857 | aux-info= | |
5de8299c | 858 | Common Joined Alias(aux-info) |
d185d268 | 859 | |
e200444e JM |
860 | coverage |
861 | Driver | |
862 | ||
603349bf JM |
863 | c |
864 | Driver | |
d185d268 NB |
865 | |
866 | d | |
867 | Common Joined | |
a7b2e184 | 868 | -d<letters> Enable dumps from specific passes of the compiler. |
d185d268 NB |
869 | |
870 | dumpbase | |
1dedc12d | 871 | Driver Common Separate Var(dump_base_name) |
a7b2e184 | 872 | -dumpbase <file> Set the file basename to be used for dumps. |
d185d268 | 873 | |
1dedc12d AO |
874 | dumpbase-ext |
875 | Driver Common Separate Var(dump_base_ext) | |
876 | -dumpbase-ext .<ext> Drop a trailing .<ext> from the dump basename to name auxiliary output files. | |
877 | ||
d7fb0a6d | 878 | dumpdir |
1dedc12d | 879 | Driver Common Separate Var(dump_dir_name) |
a7b2e184 | 880 | -dumpdir <dir> Set the directory name to be used for dumps. |
d7fb0a6d | 881 | |
603349bf JM |
882 | dumpmachine |
883 | Driver | |
884 | ||
885 | dumpspecs | |
886 | Driver | |
887 | ||
888 | dumpversion | |
889 | Driver | |
890 | ||
3c36aa6b JJ |
891 | dumpfullversion |
892 | Driver | |
893 | ||
e200444e JM |
894 | e |
895 | Driver Joined Separate | |
896 | ||
fa381cb2 JM |
897 | ; This option has historically been passed down to the linker by an |
898 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
899 | ; as a single option. The supported option for this purpose is | |
900 | ; -rdynamic. See PR 47390. | |
901 | export-dynamic | |
902 | Driver Undocumented | |
903 | ||
31b66477 KC |
904 | ; The version of the C++ ABI in use. The following values are allowed: |
905 | ; | |
906 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
907 | ; specification. This ABI may change as bugs are discovered and fixed. | |
908 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
909 | ; versions of G++. | |
910 | ; | |
90d84934 | 911 | ; 1: The version of the ABI first used in G++ 3.2. No longer selectable. |
31b66477 | 912 | ; |
785f21af JM |
913 | ; 2: The version of the ABI first used in G++ 3.4, and the default |
914 | ; until GCC 4.9. | |
abfe01ce JM |
915 | ; |
916 | ; 3: The version of the ABI that fixes the missing underscore | |
917 | ; in template non-type arguments of pointer type. | |
918 | ; | |
919 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
55af847f | 920 | ; vector types. First selectable in G++ 4.5. |
99a8d35b | 921 | ; |
67e18edb | 922 | ; 5: The version of the ABI that ignores attribute const/noreturn |
55af847f | 923 | ; in function pointer mangling, and corrects mangling of decltype and |
67e18edb | 924 | ; function parameters used in other parameters and the return type. |
55af847f | 925 | ; First selectable in G++ 4.6. |
67e18edb | 926 | ; |
4b6aaa99 JM |
927 | ; 6: The version of the ABI that doesn't promote scoped enums to int and |
928 | ; changes the mangling of template argument packs, const/static_cast, | |
929 | ; prefix ++ and --, and a class scope function used as a template | |
930 | ; argument. | |
967444bb JM |
931 | ; First selectable in G++ 4.7. |
932 | ; | |
622aac0b JM |
933 | ; 7: The version of the ABI that treats nullptr_t as a builtin type and |
934 | ; corrects the mangling of lambdas in default argument scope. | |
a3ddb738 | 935 | ; First selectable in G++ 4.8. |
0861bec8 JM |
936 | ; |
937 | ; 8: The version of the ABI that corrects the substitution behavior of | |
938 | ; function types with function-cv-qualifiers. | |
603eaec4 JM |
939 | ; First selectable in G++ 4.9 and default in G++ 5. |
940 | ; | |
a03c9bf1 JM |
941 | ; 9: The version of the ABI that corrects the alignment of nullptr_t. |
942 | ; First selectable and default in G++ 5.2. | |
943 | ; | |
944 | ; 10: The version of the ABI that mangles attributes that affect type | |
945 | ; identity, such as ia32 calling convention attributes (stdcall, etc.) | |
946 | ; Default in G++ 6 (set in c_common_post_options). | |
0861bec8 | 947 | ; |
31f7f784 JM |
948 | ; 11: The version of the ABI that corrects mangling of sizeof... expressions |
949 | ; and introduces new inheriting constructor handling. | |
34bbc4c5 JM |
950 | ; Default in G++ 7. |
951 | ; | |
f3ec182d | 952 | ; 12: Corrects the calling convention for classes with only deleted copy/move |
974aedcc | 953 | ; constructors and changes passing/returning of empty records. |
34a7a230 JM |
954 | ; Default in G++ 8.1. |
955 | ; | |
956 | ; 13: Fixes the accidental change in 12 to the calling convention for classes | |
957 | ; with deleted copy constructor and trivial move constructor. | |
958 | ; Default in G++ 8.2. | |
b1c9b3c3 | 959 | ; |
e0c866dd KK |
960 | ; 14: Corrects the mangling of nullptr expression. |
961 | ; Default in G++ 10. | |
f3ec182d | 962 | ; |
b1c9b3c3 PP |
963 | ; 15: Changes the mangling of __alignof__ to be distinct from that of alignof. |
964 | ; Default in G++ 11. | |
965 | ; | |
31b66477 KC |
966 | ; Additional positive integers will be assigned as new versions of |
967 | ; the ABI become the default version of the ABI. | |
57782ad8 | 968 | fabi-version= |
ca0e51a0 | 969 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0) |
a7b2e184 | 970 | The version of the C++ ABI in use. |
57782ad8 | 971 | |
6e616110 | 972 | faggressive-loop-optimizations |
eece52b5 | 973 | Common Var(flag_aggressive_loop_optimizations) Optimization Init(1) |
a7b2e184 | 974 | Aggressively optimize loops using language constraints. |
6e616110 | 975 | |
6ff3a151 | 976 | falign-functions |
eece52b5 | 977 | Common Var(flag_align_functions) Optimization |
a7b2e184 | 978 | Align the start of functions. |
6ff3a151 | 979 | |
058de654 | 980 | falign-functions= |
c518c102 | 981 | Common RejectNegative Joined Var(str_align_functions) Optimization |
058de654 | 982 | |
8cac4d85 | 983 | flimit-function-alignment |
eece52b5 | 984 | Common Var(flag_limit_function_alignment) Optimization Init(0) |
8cac4d85 | 985 | |
6ff3a151 | 986 | falign-jumps |
eece52b5 | 987 | Common Var(flag_align_jumps) Optimization |
a7b2e184 | 988 | Align labels which are only reached by jumping. |
6ff3a151 | 989 | |
058de654 | 990 | falign-jumps= |
c518c102 | 991 | Common RejectNegative Joined Var(str_align_jumps) Optimization |
058de654 | 992 | |
6ff3a151 | 993 | falign-labels |
eece52b5 | 994 | Common Var(flag_align_labels) Optimization |
a7b2e184 | 995 | Align all labels. |
6ff3a151 | 996 | |
058de654 | 997 | falign-labels= |
c518c102 | 998 | Common RejectNegative Joined Var(str_align_labels) Optimization |
058de654 | 999 | |
6ff3a151 | 1000 | falign-loops |
eece52b5 | 1001 | Common Var(flag_align_loops) Optimization |
a7b2e184 | 1002 | Align the start of loops. |
6ff3a151 | 1003 | |
058de654 | 1004 | falign-loops= |
8956e247 | 1005 | Common RejectNegative Joined Var(str_align_loops) Optimization |
058de654 | 1006 | |
e622a32d | 1007 | fallow-store-data-races |
eece52b5 | 1008 | Common Var(flag_store_data_races) Optimization |
e622a32d RB |
1009 | Allow the compiler to introduce new data races on stores. |
1010 | ||
757bf1df DM |
1011 | fanalyzer |
1012 | Common Var(flag_analyzer) | |
1013 | Enable static analysis pass. | |
1014 | ||
6ff3a151 | 1015 | fargument-alias |
2d2bd949 | 1016 | Common Ignore |
0d3c82d6 | 1017 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
1018 | |
1019 | fargument-noalias | |
2d2bd949 | 1020 | Common Ignore |
0d3c82d6 | 1021 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
1022 | |
1023 | fargument-noalias-global | |
2d2bd949 | 1024 | Common Ignore |
0d3c82d6 | 1025 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1026 | |
0698a1d2 | 1027 | fargument-noalias-anything |
2d2bd949 | 1028 | Common Ignore |
0d3c82d6 | 1029 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 1030 | |
de5a5fa1 | 1031 | fsanitize= |
eece52b5 | 1032 | Common Driver Joined |
a7b2e184 | 1033 | Select what to sanitize. |
32b4b7f5 | 1034 | |
f6e50a7d | 1035 | fsanitize-coverage= |
eece52b5 | 1036 | Common Joined |
cefc0906 | 1037 | Select type of coverage sanitization. |
f6e50a7d | 1038 | |
fd960af2 YG |
1039 | fasan-shadow-offset= |
1040 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1041 | -fasan-shadow-offset=<number> Use custom shadow memory offset. | |
1042 | ||
18af8d16 YG |
1043 | fsanitize-sections= |
1044 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1045 | -fsanitize-sections=<sec1,sec2,...> Sanitize global variables | |
1046 | in user-defined sections. | |
1047 | ||
d95a2703 | 1048 | fsanitize-recover= |
eece52b5 | 1049 | Common Joined |
a7b2e184 | 1050 | After diagnosing undefined behavior attempt to continue execution. |
1c33c9b7 | 1051 | |
d95a2703 | 1052 | fsanitize-recover |
eece52b5 | 1053 | Common |
a7b2e184 | 1054 | This switch is deprecated; use -fsanitize-recover= instead. |
d95a2703 | 1055 | |
6dc4a604 | 1056 | fsanitize-address-use-after-scope |
eece52b5 | 1057 | Common Driver Var(flag_sanitize_address_use_after_scope) Init(0) |
6dc4a604 | 1058 | |
1c33c9b7 | 1059 | fsanitize-undefined-trap-on-error |
eece52b5 | 1060 | Common Driver Var(flag_sanitize_undefined_trap_on_error) Init(0) |
a7b2e184 | 1061 | Use trap instead of a library function for undefined behavior sanitization. |
1c33c9b7 | 1062 | |
6ff3a151 | 1063 | fasynchronous-unwind-tables |
eece52b5 | 1064 | Common Var(flag_asynchronous_unwind_tables) Optimization |
a7b2e184 | 1065 | Generate unwind tables that are exact at each instruction boundary. |
6ff3a151 | 1066 | |
6fb5fa3c | 1067 | fauto-inc-dec |
eece52b5 | 1068 | Common Var(flag_auto_inc_dec) Init(1) Optimization |
a7b2e184 | 1069 | Generate auto-inc/dec instructions. |
6fb5fa3c | 1070 | |
be3c16c4 | 1071 | fauto-profile |
eece52b5 | 1072 | Common Var(flag_auto_profile) |
be3c16c4 DC |
1073 | Use sample profile information for call graph node weights. The default |
1074 | profile file is fbdata.afdo in 'pwd'. | |
1075 | ||
1076 | fauto-profile= | |
1077 | Common Joined RejectNegative Var(auto_profile_file) | |
1078 | Use sample profile information for call graph node weights. The profile | |
1079 | file is specified in the argument. | |
1080 | ||
31b66477 KC |
1081 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
1082 | ; For C, C++ and ObjC: defaults off. | |
1083 | ; For Java: defaults to on. | |
1084 | ; For Fortran: defaults to off. | |
6ff3a151 | 1085 | fbounds-check |
eece52b5 | 1086 | Common Var(flag_bounds_check) |
a7b2e184 | 1087 | Generate code to check bounds before indexing arrays. |
6ff3a151 NB |
1088 | |
1089 | fbranch-count-reg | |
eece52b5 | 1090 | Common Var(flag_branch_on_count_reg) Optimization |
a7b2e184 | 1091 | Replace add, compare, branch with branch on count register. |
6ff3a151 NB |
1092 | |
1093 | fbranch-probabilities | |
eece52b5 | 1094 | Common Var(flag_branch_probabilities) Optimization |
a7b2e184 | 1095 | Use profiling information for branch probabilities. |
6ff3a151 | 1096 | |
de32c0cb | 1097 | fbranch-target-load-optimize |
f78f73cb RS |
1098 | Common Ignore |
1099 | Does nothing. Preserved for backward compatibility. | |
de32c0cb NB |
1100 | |
1101 | fbranch-target-load-optimize2 | |
f78f73cb RS |
1102 | Common Ignore |
1103 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 1104 | |
1194fc79 | 1105 | fbtr-bb-exclusive |
f78f73cb RS |
1106 | Common Ignore |
1107 | Does nothing. Preserved for backward compatibility. | |
1194fc79 | 1108 | |
3cf3da88 | 1109 | fcallgraph-info |
eece52b5 | 1110 | Common RejectNegative Var(flag_callgraph_info) Init(NO_CALLGRAPH_INFO); |
3cf3da88 EB |
1111 | Output callgraph information on a per-file basis. |
1112 | ||
1113 | fcallgraph-info= | |
eece52b5 | 1114 | Common RejectNegative Joined |
3cf3da88 EB |
1115 | Output callgraph information on a per-file basis with decorations. |
1116 | ||
058de654 | 1117 | fcall-saved- |
21bf1558 | 1118 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1119 | -fcall-saved-<register> Mark <register> as being preserved across functions. |
058de654 NB |
1120 | |
1121 | fcall-used- | |
21bf1558 | 1122 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1123 | -fcall-used-<register> Mark <register> as being corrupted by function calls. |
058de654 | 1124 | |
31b66477 KC |
1125 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
1126 | ; be saved across function calls, if that produces overall better code. | |
1127 | ; Optional now, so people can test it. | |
de32c0cb | 1128 | fcaller-saves |
eece52b5 | 1129 | Common Var(flag_caller_saves) Optimization |
a7b2e184 | 1130 | Save registers around function calls. |
de32c0cb | 1131 | |
3d8864c0 | 1132 | fcheck-data-deps |
c0c12356 | 1133 | Common Ignore |
49b8fe6c | 1134 | This switch is deprecated; do not use. |
3d8864c0 | 1135 | |
2284b034 MG |
1136 | fcheck-new |
1137 | Common Var(flag_check_new) | |
a7b2e184 | 1138 | Check the return value of new in C++. |
2284b034 | 1139 | |
6d27d749 | 1140 | fchecking |
b06f87c7 | 1141 | Common Var(flag_checking) Init(CHECKING_P ? ENABLE_EXTRA_CHECKING ? 2 : 1 : 0) |
6d27d749 RB |
1142 | Perform internal consistency checkings. |
1143 | ||
7db11a5a JJ |
1144 | fchecking= |
1145 | Common Joined RejectNegative UInteger Var(flag_checking) | |
1146 | Perform internal consistency checkings. | |
1147 | ||
37ccb0ba | 1148 | fcode-hoisting |
eece52b5 | 1149 | Common Var(flag_code_hoisting) Optimization |
37ccb0ba SB |
1150 | Enable code hoisting. |
1151 | ||
ccaeeafe | 1152 | fcombine-stack-adjustments |
eece52b5 | 1153 | Common Var(flag_combine_stack_adjustments) Optimization |
ccaeeafe NC |
1154 | Looks for opportunities to reduce stack adjustments and stack references. |
1155 | ||
6ff3a151 | 1156 | fcommon |
eece52b5 | 1157 | Common Var(flag_no_common,0) Init(1) |
df73e971 | 1158 | Put uninitialized globals in the common section. |
6ff3a151 | 1159 | |
603349bf JM |
1160 | fcompare-debug |
1161 | Driver | |
1162 | ; Converted by the driver to -fcompare-debug= options. | |
1163 | ||
2153915d | 1164 | fcompare-debug= |
603349bf | 1165 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
a7b2e184 | 1166 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump. |
2153915d AO |
1167 | |
1168 | fcompare-debug-second | |
5e471ea6 | 1169 | Common Driver RejectNegative Var(flag_compare_debug) |
a7b2e184 | 1170 | Run only the second compilation of -fcompare-debug. |
2153915d | 1171 | |
e692f276 | 1172 | fcompare-elim |
eece52b5 | 1173 | Common Var(flag_compare_elim_after_reload) Optimization |
a7b2e184 | 1174 | Perform comparison elimination after register allocation has finished. |
e692f276 | 1175 | |
b5b8b0ac AO |
1176 | fconserve-stack |
1177 | Common Var(flag_conserve_stack) Optimization | |
a7b2e184 | 1178 | Do not perform optimizations increasing noticeably stack usage. |
b5b8b0ac | 1179 | |
6ff3a151 | 1180 | fcprop-registers |
eece52b5 | 1181 | Common Var(flag_cprop_registers) Optimization |
a7b2e184 | 1182 | Perform a register copy-propagation optimization pass. |
6ff3a151 | 1183 | |
de32c0cb | 1184 | fcrossjumping |
eece52b5 | 1185 | Common Var(flag_crossjumping) Optimization |
a7b2e184 | 1186 | Perform cross-jumping optimization. |
de32c0cb NB |
1187 | |
1188 | fcse-follow-jumps | |
eece52b5 | 1189 | Common Var(flag_cse_follow_jumps) Optimization |
a7b2e184 | 1190 | When running CSE, follow jumps to their targets. |
de32c0cb NB |
1191 | |
1192 | fcse-skip-blocks | |
2d2bd949 | 1193 | Common Ignore |
5f39ad47 | 1194 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1195 | |
c7463669 | 1196 | fcx-limited-range |
eece52b5 | 1197 | Common Var(flag_cx_limited_range) Optimization SetByCombined |
a7b2e184 | 1198 | Omit range reduction step when performing complex division. |
c7463669 | 1199 | |
35085f76 | 1200 | fcx-fortran-rules |
eece52b5 | 1201 | Common Var(flag_cx_fortran_rules) Optimization |
a7b2e184 | 1202 | Complex multiplication and division follow Fortran rules. |
35085f76 | 1203 | |
6ff3a151 | 1204 | fdata-sections |
eece52b5 | 1205 | Common Var(flag_data_sections) |
a7b2e184 | 1206 | Place data items into their own section. |
6ff3a151 | 1207 | |
0a090f42 | 1208 | fdbg-cnt-list |
eece52b5 | 1209 | Common Var(flag_dbg_cnt_list) |
0a090f42 SP |
1210 | List all available debugging counters with their limits and counts. |
1211 | ||
6fb5fa3c | 1212 | fdbg-cnt= |
299404a1 | 1213 | Common RejectNegative Joined Var(common_deferred_options) Defer |
83a49336 | 1214 | -fdbg-cnt=<counter>[:<lower_limit1>-]<upper_limit1>[:<lower_limit2>-<upper_limit2>:...][,<counter>:...] Set the debug counter limit. |
6fb5fa3c | 1215 | |
c8aea42c | 1216 | fdebug-prefix-map= |
299404a1 | 1217 | Common Joined RejectNegative Var(common_deferred_options) Defer |
b408e010 | 1218 | -fdebug-prefix-map=<old>=<new> Map one directory name to another in debug information. |
7365279f BK |
1219 | |
1220 | ffile-prefix-map= | |
1221 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
b408e010 | 1222 | -ffile-prefix-map=<old>=<new> Map one directory name to another in compilation result. |
c8aea42c | 1223 | |
76f9db36 | 1224 | fdebug-types-section |
eece52b5 | 1225 | Common Var(flag_debug_types_section) Init(0) |
76f9db36 JJ |
1226 | Output .debug_types section when using DWARF v4 debuginfo. |
1227 | ||
31b66477 KC |
1228 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
1229 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 1230 | fdefer-pop |
eece52b5 | 1231 | Common Var(flag_defer_pop) Optimization |
a7b2e184 | 1232 | Defer popping functions args from stack until later. |
de32c0cb NB |
1233 | |
1234 | fdelayed-branch | |
eece52b5 | 1235 | Common Var(flag_delayed_branch) Optimization |
a7b2e184 | 1236 | Attempt to fill delay slots of branch instructions. |
de32c0cb | 1237 | |
2da02156 | 1238 | fdelete-dead-exceptions |
eece52b5 | 1239 | Common Var(flag_delete_dead_exceptions) Init(0) Optimization |
a7b2e184 | 1240 | Delete dead instructions that may throw exceptions. |
2da02156 | 1241 | |
de32c0cb | 1242 | fdelete-null-pointer-checks |
eece52b5 | 1243 | Common Var(flag_delete_null_pointer_checks) Init(-1) Optimization |
a7b2e184 | 1244 | Delete useless null pointer checks. |
de32c0cb | 1245 | |
1e29e4d3 | 1246 | fdevirtualize-at-ltrans |
eece52b5 | 1247 | Common Var(flag_ltrans_devirtualize) |
a7b2e184 | 1248 | Stream extra data to support more aggressive devirtualization in LTO local transformation mode. |
1e29e4d3 | 1249 | |
bbc9396b | 1250 | fdevirtualize-speculatively |
eece52b5 | 1251 | Common Var(flag_devirtualize_speculatively) Optimization |
a7b2e184 | 1252 | Perform speculative devirtualization. |
bbc9396b | 1253 | |
ca1eedf6 | 1254 | fdevirtualize |
eece52b5 | 1255 | Common Var(flag_devirtualize) Optimization |
ca1eedf6 JH |
1256 | Try to convert virtual calls to direct ones. |
1257 | ||
de32c0cb | 1258 | fdiagnostics-show-location= |
e6d4b984 | 1259 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
a7b2e184 | 1260 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics. |
de32c0cb | 1261 | |
e6d4b984 JM |
1262 | ; Required for these enum values. |
1263 | SourceInclude | |
1264 | pretty-print.h | |
1265 | ||
1266 | Enum | |
1267 | Name(diagnostic_prefixing_rule) Type(int) | |
1268 | ||
1269 | EnumValue | |
1270 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1271 | ||
1272 | EnumValue | |
1273 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1274 | ||
9fec0042 MLI |
1275 | fdiagnostics-show-caret |
1276 | Common Var(flag_diagnostics_show_caret) Init(1) | |
a7b2e184 | 1277 | Show the source line with a caret indicating the column. |
9fec0042 | 1278 | |
96e6ae57 DM |
1279 | fdiagnostics-show-labels |
1280 | Common Var(flag_diagnostics_show_labels) Init(1) | |
04e5c73d | 1281 | Show labels annotating ranges of source code when showing source. |
96e6ae57 | 1282 | |
56b61d7f DM |
1283 | fdiagnostics-show-line-numbers |
1284 | Common Var(flag_diagnostics_show_line_numbers) Init(1) | |
04e5c73d | 1285 | Show line numbers in the left margin when showing source. |
56b61d7f | 1286 | |
4b84d650 JJ |
1287 | fdiagnostics-color |
1288 | Common Alias(fdiagnostics-color=,always,never) | |
1289 | ; | |
1290 | ||
1291 | fdiagnostics-color= | |
97aa8bb6 | 1292 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) |
a7b2e184 | 1293 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics. |
4b84d650 JJ |
1294 | |
1295 | ; Required for these enum values. | |
1296 | SourceInclude | |
1297 | diagnostic-color.h | |
1298 | ||
1299 | Enum | |
1300 | Name(diagnostic_color_rule) Type(int) | |
1301 | ||
1302 | EnumValue | |
1303 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1304 | ||
1305 | EnumValue | |
1306 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1307 | ||
1308 | EnumValue | |
1309 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1310 | ||
d2608235 DM |
1311 | fdiagnostics-urls= |
1312 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_urls) Enum(diagnostic_url_rule) Init(DIAGNOSTICS_URL_AUTO) | |
1313 | -fdiagnostics-urls=[never|always|auto] Embed URLs in diagnostics. | |
1314 | ||
1315 | ; Required for these enum values. | |
1316 | SourceInclude | |
1317 | diagnostic-url.h | |
1318 | ||
1319 | Enum | |
1320 | Name(diagnostic_url_rule) Type(int) | |
1321 | ||
1322 | EnumValue | |
1323 | Enum(diagnostic_url_rule) String(never) Value(DIAGNOSTICS_URL_NO) | |
1324 | ||
1325 | EnumValue | |
1326 | Enum(diagnostic_url_rule) String(always) Value(DIAGNOSTICS_URL_YES) | |
1327 | ||
1328 | EnumValue | |
1329 | Enum(diagnostic_url_rule) String(auto) Value(DIAGNOSTICS_URL_AUTO) | |
1330 | ||
004bb936 LH |
1331 | fdiagnostics-column-unit= |
1332 | Common Joined RejectNegative Enum(diagnostics_column_unit) | |
1333 | -fdiagnostics-column-unit=[display|byte] Select whether column numbers are output as display columns (default) or raw bytes. | |
1334 | ||
1335 | fdiagnostics-column-origin= | |
1336 | Common Joined RejectNegative UInteger | |
1337 | -fdiagnostics-column-origin=<number> Set the number of the first column. The default is 1-based as per GNU style, but some utilities may expect 0-based, for example. | |
1338 | ||
478dd60d DM |
1339 | fdiagnostics-format= |
1340 | Common Joined RejectNegative Enum(diagnostics_output_format) | |
b408e010 | 1341 | -fdiagnostics-format=[text|json] Select output format. |
478dd60d DM |
1342 | |
1343 | ; Required for these enum values. | |
1344 | SourceInclude | |
1345 | diagnostic.h | |
1346 | ||
004bb936 LH |
1347 | Enum |
1348 | Name(diagnostics_column_unit) Type(int) | |
1349 | ||
1350 | EnumValue | |
1351 | Enum(diagnostics_column_unit) String(display) Value(DIAGNOSTICS_COLUMN_UNIT_DISPLAY) | |
1352 | ||
1353 | EnumValue | |
1354 | Enum(diagnostics_column_unit) String(byte) Value(DIAGNOSTICS_COLUMN_UNIT_BYTE) | |
1355 | ||
478dd60d DM |
1356 | Enum |
1357 | Name(diagnostics_output_format) Type(int) | |
1358 | ||
1359 | EnumValue | |
1360 | Enum(diagnostics_output_format) String(text) Value(DIAGNOSTICS_OUTPUT_FORMAT_TEXT) | |
1361 | ||
1362 | EnumValue | |
1363 | Enum(diagnostics_output_format) String(json) Value(DIAGNOSTICS_OUTPUT_FORMAT_JSON) | |
1364 | ||
a93eac6a DM |
1365 | fdiagnostics-parseable-fixits |
1366 | Common Var(flag_diagnostics_parseable_fixits) | |
8135a004 | 1367 | Print fix-it hints in machine-readable form. |
a93eac6a | 1368 | |
717ebe91 DM |
1369 | fdiagnostics-generate-patch |
1370 | Common Var(flag_diagnostics_generate_patch) | |
1371 | Print fix-it hints to stderr in unified diff format. | |
1372 | ||
ccf08a6e | 1373 | fdiagnostics-show-option |
c7d0de89 | 1374 | Common Var(flag_diagnostics_show_option) Init(1) |
a7b2e184 | 1375 | Amend appropriate diagnostic messages with the command line option that controls them. |
ccf08a6e | 1376 | |
6d4a35ca DM |
1377 | fdiagnostics-show-cwe |
1378 | Common Var(flag_diagnostics_show_cwe) Init(1) | |
1379 | Print CWE identifiers for diagnostic messages, where available. | |
1380 | ||
4bc1899b DM |
1381 | fdiagnostics-path-format= |
1382 | Common Joined RejectNegative Var(flag_diagnostics_path_format) Enum(diagnostic_path_format) Init(DPF_INLINE_EVENTS) | |
1383 | Specify how to print any control-flow path associated with a diagnostic. | |
1384 | ||
129a1319 LH |
1385 | fdiagnostics-plain-output |
1386 | Driver Common RejectNegative | |
1387 | Turn off any diagnostics features that complicate the output, such as line numbers, color, and warning URLs. | |
1388 | ||
004bb936 LH |
1389 | ftabstop= |
1390 | Common Joined RejectNegative UInteger | |
1391 | -ftabstop=<number> Distance between tab stops for column reporting. | |
1392 | ||
4bc1899b DM |
1393 | Enum |
1394 | Name(diagnostic_path_format) Type(int) | |
1395 | ||
1396 | EnumValue | |
1397 | Enum(diagnostic_path_format) String(none) Value(DPF_NONE) | |
1398 | ||
1399 | EnumValue | |
1400 | Enum(diagnostic_path_format) String(separate-events) Value(DPF_SEPARATE_EVENTS) | |
1401 | ||
1402 | EnumValue | |
1403 | Enum(diagnostic_path_format) String(inline-events) Value(DPF_INLINE_EVENTS) | |
1404 | ||
1405 | fdiagnostics-show-path-depths | |
1406 | Common Var(flag_diagnostics_show_path_depths) Init(0) | |
1407 | Show stack depths of events in paths. | |
1408 | ||
0141ab44 DM |
1409 | fdiagnostics-minimum-margin-width= |
1410 | Common Joined UInteger Var(diagnostics_minimum_margin_width) Init(6) | |
04e5c73d | 1411 | Set minimum width of left margin of source code when showing source. |
0141ab44 | 1412 | |
226c52aa XDL |
1413 | fdisable- |
1414 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
b408e010 | 1415 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 Disable an optimization pass. |
226c52aa XDL |
1416 | |
1417 | fenable- | |
1418 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
b408e010 | 1419 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 Enable an optimization pass. |
226c52aa | 1420 | |
6de9cd9a | 1421 | fdump- |
21bf1558 | 1422 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1423 | -fdump-<type> Dump various compiler internals to a file. |
6de9cd9a | 1424 | |
d1583032 JM |
1425 | fdump-final-insns |
1426 | Driver RejectNegative | |
1427 | ||
2153915d AO |
1428 | fdump-final-insns= |
1429 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
a7b2e184 | 1430 | -fdump-final-insns=filename Dump to filename the insns at the end of translation. |
2153915d | 1431 | |
c6a13190 ILT |
1432 | fdump-go-spec= |
1433 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
a7b2e184 | 1434 | -fdump-go-spec=filename Write all declarations to file as Go code. |
c6a13190 | 1435 | |
24a7799e | 1436 | fdump-noaddr |
eece52b5 | 1437 | Common Var(flag_dump_noaddr) |
a7b2e184 | 1438 | Suppress output of addresses in debugging dumps. |
24a7799e | 1439 | |
dc10fd96 JJ |
1440 | freport-bug |
1441 | Common Driver Var(flag_report_bug) | |
1442 | Collect and dump debug information into temporary file if ICE in C/C++ | |
bd2c6270 | 1443 | compiler occurred. |
dc10fd96 | 1444 | |
ba4ad400 DM |
1445 | fdump-internal-locations |
1446 | Common Var(flag_dump_locations) Init(0) | |
a7b2e184 | 1447 | Dump detailed information on GCC's internal representation of source code locations. |
ba4ad400 | 1448 | |
deced1e2 XDL |
1449 | fdump-passes |
1450 | Common Var(flag_dump_passes) Init(0) | |
a7b2e184 | 1451 | Dump optimization passes. |
deced1e2 | 1452 | |
6ff3a151 | 1453 | fdump-unnumbered |
eece52b5 | 1454 | Common Var(flag_dump_unnumbered) |
a7b2e184 | 1455 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps. |
6ff3a151 | 1456 | |
2aa7c49b | 1457 | fdump-unnumbered-links |
eece52b5 | 1458 | Common Var(flag_dump_unnumbered_links) |
a7b2e184 | 1459 | Suppress output of previous and next insn numbers in debugging dumps. |
2aa7c49b | 1460 | |
b5b8b0ac | 1461 | fdwarf2-cfi-asm |
eece52b5 | 1462 | Common Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) |
b5b8b0ac AO |
1463 | Enable CFI tables via GAS assembler directives. |
1464 | ||
355866de | 1465 | fearly-inlining |
eece52b5 | 1466 | Common Var(flag_early_inlining) Init(1) Optimization |
a7b2e184 | 1467 | Perform early inlining. |
355866de | 1468 | |
de32c0cb | 1469 | feliminate-dwarf2-dups |
1823c4f6 RB |
1470 | Common Ignore |
1471 | Does nothing. Preserved for backward compatibility. | |
de32c0cb | 1472 | |
07ffa034 | 1473 | fipa-sra |
eece52b5 | 1474 | Common Var(flag_ipa_sra) Init(0) Optimization |
a7b2e184 | 1475 | Perform interprocedural reduction of aggregates. |
07ffa034 | 1476 | |
6a08f7b3 | 1477 | feliminate-unused-debug-symbols |
eece52b5 | 1478 | Common Var(flag_debug_only_used_symbols) Init(1) |
a7b2e184 | 1479 | Perform unused symbol elimination in debug info. |
6a08f7b3 | 1480 | |
de32c0cb | 1481 | feliminate-unused-debug-types |
eece52b5 | 1482 | Common Var(flag_eliminate_unused_debug_types) Init(1) |
a7b2e184 | 1483 | Perform unused type elimination in debug info. |
de32c0cb | 1484 | |
e713adf6 | 1485 | femit-class-debug-always |
eece52b5 | 1486 | Common Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1487 | Do not suppress C++ class debug information. |
1488 | ||
6ff3a151 | 1489 | fexceptions |
eece52b5 | 1490 | Common Var(flag_exceptions) Optimization |
a7b2e184 | 1491 | Enable exception handling. |
6ff3a151 | 1492 | |
de32c0cb | 1493 | fexpensive-optimizations |
eece52b5 | 1494 | Common Var(flag_expensive_optimizations) Optimization |
a7b2e184 | 1495 | Perform a number of minor, expensive optimizations. |
de32c0cb | 1496 | |
8ce94e44 | 1497 | fexcess-precision= |
df375b03 | 1498 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision) Init(EXCESS_PRECISION_DEFAULT) Optimization SetByCombined |
a7b2e184 | 1499 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision. |
8ce94e44 | 1500 | |
e6d4b984 JM |
1501 | Enum |
1502 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1503 | ||
1504 | EnumValue | |
1505 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1506 | ||
1507 | EnumValue | |
1508 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1509 | ||
04f0fcf7 JG |
1510 | ; Whether we permit the extended set of values for FLT_EVAL_METHOD |
1511 | ; introduced in ISO/IEC TS 18661-3, or limit ourselves to those in C99/C11. | |
1512 | fpermitted-flt-eval-methods= | |
1513 | Common Joined RejectNegative Enum(permitted_flt_eval_methods) Var(flag_permitted_flt_eval_methods) Init(PERMITTED_FLT_EVAL_METHODS_DEFAULT) | |
1514 | -fpermitted-flt-eval-methods=[c11|ts-18661] Specify which values of FLT_EVAL_METHOD are permitted. | |
1515 | ||
1516 | Enum | |
1517 | Name(permitted_flt_eval_methods) Type(enum permitted_flt_eval_methods) UnknownError(unknown specification for the set of FLT_EVAL_METHOD values to permit %qs) | |
1518 | ||
1519 | EnumValue | |
1520 | Enum(permitted_flt_eval_methods) String(c11) Value(PERMITTED_FLT_EVAL_METHODS_C11) | |
1521 | ||
1522 | EnumValue | |
1523 | Enum(permitted_flt_eval_methods) String(ts-18661-3) Value(PERMITTED_FLT_EVAL_METHODS_TS_18661) | |
1524 | ||
058de654 | 1525 | ffast-math |
bfd67b47 | 1526 | Common Optimization |
058de654 | 1527 | |
cc8547a7 | 1528 | ffat-lto-objects |
e9f67e62 | 1529 | Common Var(flag_fat_lto_objects) |
cc8547a7 AK |
1530 | Output lto objects containing both the intermediate language and binary output. |
1531 | ||
6ff3a151 | 1532 | ffinite-math-only |
eece52b5 | 1533 | Common Var(flag_finite_math_only) Optimization SetByCombined |
a7b2e184 | 1534 | Assume no NaNs or infinities are generated. |
6ff3a151 | 1535 | |
c29c92c7 | 1536 | ffinite-loops |
eece52b5 | 1537 | Common Var(flag_finite_loops) Optimization Init(0) |
c29c92c7 FX |
1538 | Assume that loops with an exit will terminate and not loop indefinitely. |
1539 | ||
058de654 | 1540 | ffixed- |
21bf1558 | 1541 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 1542 | -ffixed-<register> Mark <register> as being unavailable to the compiler. |
058de654 | 1543 | |
de32c0cb | 1544 | ffloat-store |
eece52b5 | 1545 | Common Var(flag_float_store) Optimization |
a7b2e184 | 1546 | Don't allocate floats and doubles in extended-precision registers. |
de32c0cb NB |
1547 | |
1548 | fforce-addr | |
2d2bd949 | 1549 | Common Ignore |
3de5e93a | 1550 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1551 | |
2ca2b607 | 1552 | fforward-propagate |
eece52b5 | 1553 | Common Var(flag_forward_propagate) Optimization |
a7b2e184 | 1554 | Perform a forward propagation pass on RTL. |
a52b023a | 1555 | |
16949072 | 1556 | ffp-contract= |
bea30e0d | 1557 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) Optimization |
6a825afe | 1558 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
16949072 | 1559 | |
e6d4b984 JM |
1560 | Enum |
1561 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1562 | ||
1563 | EnumValue | |
1564 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1565 | ||
1566 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1567 | EnumValue | |
1568 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1569 | ||
1570 | EnumValue | |
1571 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1572 | ||
0d2f700f | 1573 | ffp-int-builtin-inexact |
eece52b5 | 1574 | Common Var(flag_fp_int_builtin_inexact) Init(1) Optimization |
0d2f700f JM |
1575 | Allow built-in functions ceil, floor, round, trunc to raise \"inexact\" exceptions. |
1576 | ||
31b66477 KC |
1577 | ; Nonzero means don't put addresses of constant functions in registers. |
1578 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1579 | ; done on the assembly output. | |
de32c0cb | 1580 | ffunction-cse |
eece52b5 | 1581 | Common Var(flag_no_function_cse,0) Optimization |
a7b2e184 | 1582 | Allow function addresses to be held in registers. |
de32c0cb | 1583 | |
6ff3a151 | 1584 | ffunction-sections |
eece52b5 | 1585 | Common Var(flag_function_sections) |
a7b2e184 | 1586 | Place each function into its own section. |
6ff3a151 | 1587 | |
de32c0cb | 1588 | fgcse |
eece52b5 | 1589 | Common Var(flag_gcse) Optimization |
a7b2e184 | 1590 | Perform global common subexpression elimination. |
de32c0cb NB |
1591 | |
1592 | fgcse-lm | |
eece52b5 | 1593 | Common Var(flag_gcse_lm) Init(1) Optimization |
a7b2e184 | 1594 | Perform enhanced load motion during global common subexpression elimination. |
de32c0cb NB |
1595 | |
1596 | fgcse-sm | |
eece52b5 | 1597 | Common Var(flag_gcse_sm) Init(0) Optimization |
a7b2e184 | 1598 | Perform store motion after global common subexpression elimination. |
de32c0cb | 1599 | |
f5f2e3cd | 1600 | fgcse-las |
eece52b5 | 1601 | Common Var(flag_gcse_las) Init(0) Optimization |
f9957958 | 1602 | Perform redundant load after store elimination in global common subexpression |
a7b2e184 | 1603 | elimination. |
f9957958 MH |
1604 | |
1605 | fgcse-after-reload | |
eece52b5 | 1606 | Common Var(flag_gcse_after_reload) Optimization |
a7b2e184 MS |
1607 | Perform global common subexpression elimination after register allocation has |
1608 | finished. | |
f5f2e3cd | 1609 | |
6592d14b PMR |
1610 | Enum |
1611 | Name(dwarf_gnat_encodings) Type(int) | |
1612 | ||
1613 | EnumValue | |
1614 | Enum(dwarf_gnat_encodings) String(all) Value(DWARF_GNAT_ENCODINGS_ALL) | |
1615 | ||
1616 | EnumValue | |
1617 | Enum(dwarf_gnat_encodings) String(gdb) Value(DWARF_GNAT_ENCODINGS_GDB) | |
1618 | ||
1619 | EnumValue | |
1620 | Enum(dwarf_gnat_encodings) String(minimal) Value(DWARF_GNAT_ENCODINGS_MINIMAL) | |
1621 | ||
1622 | fgnat-encodings= | |
eece52b5 | 1623 | Common Enum(dwarf_gnat_encodings) Joined RejectNegative Undocumented Var(gnat_encodings) |
04e5c73d | 1624 | -fgnat-encodings=[all|gdb|minimal] Select the balance between GNAT encodings and standard DWARF emitted in the debug information. |
6592d14b | 1625 | |
d0a58904 | 1626 | ; This option is not documented yet as its semantics will change. |
f8bf9252 | 1627 | fgraphite |
eece52b5 | 1628 | Common Var(flag_graphite) Optimization |
a7b2e184 | 1629 | Enable in and out of Graphite representation. |
f8bf9252 | 1630 | |
204b560f | 1631 | fgraphite-identity |
eece52b5 | 1632 | Common Var(flag_graphite_identity) Optimization |
a7b2e184 | 1633 | Enable Graphite Identity transformation. |
204b560f | 1634 | |
372a6eb8 | 1635 | fhoist-adjacent-loads |
eece52b5 | 1636 | Common Var(flag_hoist_adjacent_loads) Optimization |
372a6eb8 | 1637 | Enable hoisting adjacent loads to encourage generating conditional move |
a7b2e184 | 1638 | instructions. |
372a6eb8 | 1639 | |
1a218fc9 | 1640 | fkeep-gc-roots-live |
eece52b5 | 1641 | Common Undocumented Var(flag_keep_gc_roots_live) Optimization |
1a218fc9 ILT |
1642 | ; Always keep a pointer to a live memory block |
1643 | ||
530b4409 | 1644 | flarge-source-files |
eece52b5 | 1645 | Common Var(flag_large_source_files) Init(0) |
530b4409 | 1646 | Improve GCC's ability to track column numbers in large source files, |
1647 | at the expense of slower compilation. | |
1648 | ||
3cf0e270 | 1649 | floop-parallelize-all |
eece52b5 | 1650 | Common Var(flag_loop_parallelize_all) Optimization |
a7b2e184 | 1651 | Mark all loops as parallel. |
204b560f | 1652 | |
f8bf9252 | 1653 | floop-strip-mine |
d6bb5ccf | 1654 | Common Alias(floop-nest-optimize) |
a7b2e184 | 1655 | Enable loop nest transforms. Same as -floop-nest-optimize. |
f8bf9252 SP |
1656 | |
1657 | floop-interchange | |
eece52b5 | 1658 | Common Var(flag_loop_interchange) Optimization |
fbdec14e | 1659 | Enable loop interchange on trees. |
f8bf9252 SP |
1660 | |
1661 | floop-block | |
d6bb5ccf | 1662 | Common Alias(floop-nest-optimize) |
a7b2e184 | 1663 | Enable loop nest transforms. Same as -floop-nest-optimize. |
f8bf9252 | 1664 | |
20d3465b | 1665 | floop-unroll-and-jam |
eece52b5 | 1666 | Common Var(flag_unroll_jam) Optimization |
dc236397 | 1667 | Perform unroll-and-jam on loops. |
a7b2e184 | 1668 | |
0a35513e | 1669 | fgnu-tm |
eece52b5 | 1670 | Common Var(flag_tm) |
a7b2e184 | 1671 | Enable support for GNU transactional memory. |
0a35513e | 1672 | |
da34ade5 | 1673 | fgnu-unique |
eece52b5 | 1674 | Common Var(flag_gnu_unique) Init(1) |
a7b2e184 | 1675 | Use STB_GNU_UNIQUE if supported by the assembler. |
da34ade5 | 1676 | |
98af4c9f | 1677 | floop-flatten |
093193be MK |
1678 | Common Ignore |
1679 | Does nothing. Preserved for backward compatibility. | |
98af4c9f | 1680 | |
b60cc080 | 1681 | floop-nest-optimize |
eece52b5 | 1682 | Common Var(flag_loop_nest_optimize) Optimization |
e357a5e0 | 1683 | Enable the loop nest optimizer. |
b60cc080 | 1684 | |
6a78b724 | 1685 | fstrict-volatile-bitfields |
eece52b5 | 1686 | Common Var(flag_strict_volatile_bitfields) Init(-1) Optimization |
a7b2e184 | 1687 | Force bitfield accesses to match their type width. |
6a78b724 | 1688 | |
f663d9ad | 1689 | fstore-merging |
eece52b5 | 1690 | Common Var(flag_store_merging) Optimization |
f663d9ad KT |
1691 | Merge adjacent stores. |
1692 | ||
6ff3a151 | 1693 | fguess-branch-probability |
eece52b5 | 1694 | Common Var(flag_guess_branch_prob) Optimization |
a7b2e184 | 1695 | Enable guessing of branch probabilities. |
6ff3a151 | 1696 | |
31b66477 KC |
1697 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1698 | ; Generate position-independent code for executables if possible | |
1699 | ; On SVR4 targets, it also controls whether or not to emit a | |
1700 | ; string identifying the compiler. | |
6ff3a151 | 1701 | fident |
eece52b5 | 1702 | Common Var(flag_no_ident,0) |
a7b2e184 | 1703 | Process #ident directives. |
6ff3a151 | 1704 | |
de32c0cb | 1705 | fif-conversion |
eece52b5 | 1706 | Common Var(flag_if_conversion) Optimization |
a7b2e184 | 1707 | Perform conversion of conditional jumps to branchless equivalents. |
de32c0cb NB |
1708 | |
1709 | fif-conversion2 | |
eece52b5 | 1710 | Common Var(flag_if_conversion2) Optimization |
a7b2e184 | 1711 | Perform conversion of conditional jumps to conditional execution. |
de32c0cb | 1712 | |
87e2a8fd | 1713 | fstack-reuse= |
082908e3 | 1714 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) Optimization |
6a825afe | 1715 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. |
87e2a8fd XDL |
1716 | |
1717 | Enum | |
1718 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1719 | ||
1720 | EnumValue | |
1721 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1722 | ||
1723 | EnumValue | |
1724 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1725 | ||
1726 | EnumValue | |
1727 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1728 | ||
384a5197 | 1729 | ftree-loop-if-convert |
eece52b5 | 1730 | Common Var(flag_tree_loop_if_convert) Init(-1) Optimization |
a7b2e184 | 1731 | Convert conditional jumps in innermost loops to branchless equivalents. |
384a5197 | 1732 | |
bd544141 | 1733 | ftree-loop-if-convert-stores |
bef69eb5 RB |
1734 | Common Ignore |
1735 | Does nothing. Preserved for backward compatibility. | |
bd544141 | 1736 | |
31b66477 KC |
1737 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1738 | ; This is used only for compiling crtstuff.c, | |
1739 | ; and it may be extended to other effects | |
1740 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1741 | finhibit-size-directive |
eece52b5 | 1742 | Common Var(flag_inhibit_size_directive) |
a7b2e184 | 1743 | Do not generate .size directives. |
6ff3a151 | 1744 | |
3e293154 | 1745 | findirect-inlining |
eece52b5 | 1746 | Common Var(flag_indirect_inlining) Optimization |
a7b2e184 | 1747 | Perform indirect inlining. |
3e293154 | 1748 | |
99ea07f8 RG |
1749 | ; General flag to enable inlining. Specifying -fno-inline will disable |
1750 | ; all inlining apart from always-inline functions. | |
de32c0cb | 1751 | finline |
eece52b5 | 1752 | Common Var(flag_no_inline,0) Init(0) Optimization |
a7b2e184 | 1753 | Enable inlining of function declared \"inline\", disabling disables all inlining. |
de32c0cb | 1754 | |
4d4b8cb9 | 1755 | finline-small-functions |
eece52b5 | 1756 | Common Var(flag_inline_small_functions) Optimization |
a7b2e184 | 1757 | Integrate functions into their callers when code size is known not to grow. |
4d4b8cb9 | 1758 | |
de32c0cb | 1759 | finline-functions |
eece52b5 | 1760 | Common Var(flag_inline_functions) Optimization |
a7b2e184 | 1761 | Integrate functions not declared \"inline\" into their callers when profitable. |
de32c0cb | 1762 | |
355866de | 1763 | finline-functions-called-once |
eece52b5 | 1764 | Common Var(flag_inline_functions_called_once) Optimization |
a7b2e184 | 1765 | Integrate functions only required by their single caller. |
d63db217 | 1766 | |
d302c9d6 | 1767 | finline-limit- |
5de8299c | 1768 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1769 | |
1770 | finline-limit= | |
1771 | Common RejectNegative Joined UInteger | |
a7b2e184 | 1772 | -finline-limit=<number> Limit the size of inlined functions to <number>. |
d302c9d6 | 1773 | |
86951993 | 1774 | finline-atomics |
eece52b5 | 1775 | Common Var(flag_inline_atomics) Init(1) Optimization |
86951993 AM |
1776 | Inline __atomic operations when a lock free instruction sequence is available. |
1777 | ||
5c5f0b65 IT |
1778 | fcf-protection |
1779 | Common RejectNegative Alias(fcf-protection=,full) | |
1780 | ||
1781 | fcf-protection= | |
eece52b5 | 1782 | Common Joined RejectNegative Enum(cf_protection_level) Var(flag_cf_protection) Init(CF_NONE) |
c4c22e83 | 1783 | -fcf-protection=[full|branch|return|none|check] Instrument functions with checks to verify jump/call/return control-flow transfer |
5c5f0b65 IT |
1784 | instructions have valid targets. |
1785 | ||
1786 | Enum | |
cefc0906 | 1787 | Name(cf_protection_level) Type(enum cf_protection_level) UnknownError(unknown Control-Flow Protection Level %qs) |
5c5f0b65 IT |
1788 | |
1789 | EnumValue | |
1790 | Enum(cf_protection_level) String(full) Value(CF_FULL) | |
1791 | ||
1792 | EnumValue | |
1793 | Enum(cf_protection_level) String(branch) Value(CF_BRANCH) | |
1794 | ||
1795 | EnumValue | |
1796 | Enum(cf_protection_level) String(return) Value(CF_RETURN) | |
1797 | ||
c4c22e83 L |
1798 | EnumValue |
1799 | Enum(cf_protection_level) String(check) Value(CF_CHECK) | |
1800 | ||
5c5f0b65 IT |
1801 | EnumValue |
1802 | Enum(cf_protection_level) String(none) Value(CF_NONE) | |
1803 | ||
6ff3a151 | 1804 | finstrument-functions |
eece52b5 | 1805 | Common Var(flag_instrument_function_entry_exit) |
a7b2e184 | 1806 | Instrument function entry and exit with profiling calls. |
6ff3a151 | 1807 | |
8d5a7d1f ILT |
1808 | finstrument-functions-exclude-function-list= |
1809 | Common RejectNegative Joined | |
b408e010 | 1810 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions. |
8d5a7d1f ILT |
1811 | |
1812 | finstrument-functions-exclude-file-list= | |
1813 | Common RejectNegative Joined | |
b408e010 | 1814 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files. |
8d5a7d1f | 1815 | |
d6e14e8f | 1816 | fipa-cp |
eece52b5 | 1817 | Common Var(flag_ipa_cp) Optimization |
a7b2e184 | 1818 | Perform interprocedural constant propagation. |
d6e14e8f | 1819 | |
5e45130d | 1820 | fipa-cp-clone |
eece52b5 | 1821 | Common Var(flag_ipa_cp_clone) Optimization |
a7b2e184 | 1822 | Perform cloning to make Interprocedural constant propagation stronger. |
5e45130d | 1823 | |
3c99176a | 1824 | fipa-cp-alignment |
78117646 MJ |
1825 | Common Ignore |
1826 | Does nothing. Preserved for backward compatibility. | |
3c99176a | 1827 | |
209ca542 | 1828 | fipa-bit-cp |
eece52b5 | 1829 | Common Var(flag_ipa_bit_cp) Optimization |
209ca542 PK |
1830 | Perform interprocedural bitwise constant propagation. |
1831 | ||
d119f34c | 1832 | fipa-modref |
eece52b5 | 1833 | Common Var(flag_ipa_modref) Optimization |
466b907f | 1834 | Perform interprocedural modref analysis. |
d119f34c | 1835 | |
e65bb9be | 1836 | fipa-profile |
eece52b5 | 1837 | Common Var(flag_ipa_profile) Init(0) Optimization |
a7b2e184 | 1838 | Perform interprocedural profile propagation. |
ea900239 | 1839 | |
4cf4d6a3 | 1840 | fipa-pta |
eece52b5 | 1841 | Common Var(flag_ipa_pta) Init(0) Optimization |
a7b2e184 | 1842 | Perform interprocedural points-to analysis. |
4cf4d6a3 | 1843 | |
e65bb9be | 1844 | fipa-pure-const |
eece52b5 | 1845 | Common Var(flag_ipa_pure_const) Init(0) Optimization |
a7b2e184 | 1846 | Discover pure and const functions. |
e65bb9be | 1847 | |
b84d4347 | 1848 | fipa-icf |
eece52b5 | 1849 | Common Var(flag_ipa_icf) Optimization |
a7b2e184 | 1850 | Perform Identical Code Folding for functions and read-only variables. |
b84d4347 ML |
1851 | |
1852 | fipa-icf-functions | |
eece52b5 | 1853 | Common Var(flag_ipa_icf_functions) Optimization |
a7b2e184 | 1854 | Perform Identical Code Folding for functions. |
b84d4347 ML |
1855 | |
1856 | fipa-icf-variables | |
eece52b5 | 1857 | Common Var(flag_ipa_icf_variables) Optimization |
a7b2e184 | 1858 | Perform Identical Code Folding for variables. |
b84d4347 | 1859 | |
ea900239 | 1860 | fipa-reference |
eece52b5 | 1861 | Common Var(flag_ipa_reference) Init(0) Optimization |
2e14744f ML |
1862 | Discover read-only and non addressable static variables. |
1863 | ||
1864 | fipa-reference-addressable | |
eece52b5 | 1865 | Common Var(flag_ipa_reference_addressable) Init(0) Optimization |
2e14744f | 1866 | Discover read-only, write-only and non-addressable static variables. |
ea900239 | 1867 | |
47b840eb | 1868 | fipa-stack-alignment |
eece52b5 | 1869 | Common Var(flag_ipa_stack_alignment) Init(1) Optimization |
47b840eb ML |
1870 | Reduce stack alignment on call sites if possible. |
1871 | ||
43d861a5 | 1872 | fipa-matrix-reorg |
04f92ff4 RG |
1873 | Common Ignore |
1874 | Does nothing. Preserved for backward compatibility. | |
43d861a5 | 1875 | |
e1dc98b2 | 1876 | fipa-struct-reorg |
b8beb4d1 RG |
1877 | Common Ignore |
1878 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1879 | |
8bc5448f | 1880 | fipa-vrp |
eece52b5 | 1881 | Common Var(flag_ipa_vrp) Optimization |
8bc5448f KV |
1882 | Perform IPA Value Range Propagation. |
1883 | ||
058e97ec | 1884 | fira-algorithm= |
b16650ac | 1885 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) Optimization |
6a825afe | 1886 | -fira-algorithm=[CB|priority] Set the used IRA algorithm. |
7db7ed3c | 1887 | |
e6d4b984 JM |
1888 | Enum |
1889 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1890 | ||
1891 | EnumValue | |
1892 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1893 | ||
1894 | EnumValue | |
1895 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1896 | ||
7db7ed3c | 1897 | fira-region= |
b16650ac | 1898 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) Optimization |
6a825afe | 1899 | -fira-region=[one|all|mixed] Set regions for IRA. |
058e97ec | 1900 | |
e6d4b984 JM |
1901 | Enum |
1902 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1903 | ||
1904 | EnumValue | |
1905 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1906 | ||
1907 | EnumValue | |
1908 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1909 | ||
1910 | EnumValue | |
1911 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1912 | ||
b11f0116 | 1913 | fira-hoist-pressure |
eece52b5 | 1914 | Common Var(flag_ira_hoist_pressure) Init(1) Optimization |
b11f0116 BC |
1915 | Use IRA based register pressure calculation |
1916 | in RTL hoist optimizations. | |
1917 | ||
1833192f | 1918 | fira-loop-pressure |
eece52b5 | 1919 | Common Var(flag_ira_loop_pressure) Optimization |
1833192f VM |
1920 | Use IRA based register pressure calculation |
1921 | in RTL loop optimizations. | |
1922 | ||
058e97ec | 1923 | fira-share-save-slots |
eece52b5 | 1924 | Common Var(flag_ira_share_save_slots) Init(1) Optimization |
058e97ec VM |
1925 | Share slots for saving different hard registers. |
1926 | ||
1927 | fira-share-spill-slots | |
eece52b5 | 1928 | Common Var(flag_ira_share_spill_slots) Init(1) Optimization |
058e97ec VM |
1929 | Share stack slots for spilled pseudo-registers. |
1930 | ||
1931 | fira-verbose= | |
5498f011 | 1932 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1933 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1934 | |
8b11a64c | 1935 | fivopts |
eece52b5 | 1936 | Common Var(flag_ivopts) Init(1) Optimization |
a7b2e184 | 1937 | Optimize induction variables on trees. |
8b11a64c | 1938 | |
82c0180d | 1939 | fjump-tables |
c662432e | 1940 | Common Var(flag_jump_tables) Init(1) Optimization |
a7b2e184 | 1941 | Use jump tables for sufficiently large switch statements. |
82c0180d | 1942 | |
9b11203e ML |
1943 | fbit-tests |
1944 | Common Var(flag_bit_tests) Init(1) Optimization | |
1945 | Use bit tests for sufficiently large switch statements. | |
1946 | ||
de32c0cb | 1947 | fkeep-inline-functions |
eece52b5 | 1948 | Common Var(flag_keep_inline_functions) |
a7b2e184 | 1949 | Generate code for functions even if they are fully inlined. |
de32c0cb | 1950 | |
787da5fd | 1951 | fkeep-static-functions |
eece52b5 | 1952 | Common Var(flag_keep_static_functions) |
a7b2e184 | 1953 | Generate code for static functions even if they are never called. |
787da5fd | 1954 | |
de32c0cb | 1955 | fkeep-static-consts |
eece52b5 | 1956 | Common Var(flag_keep_static_consts) Init(1) |
a7b2e184 | 1957 | Emit static const variables even if they are not used. |
de32c0cb | 1958 | |
6ff3a151 | 1959 | fleading-underscore |
eece52b5 | 1960 | Common Var(flag_leading_underscore) Init(-1) |
a7b2e184 | 1961 | Give external symbols a leading underscore. |
6ff3a151 | 1962 | |
efa1cdf0 | 1963 | floop-optimize |
2d2bd949 | 1964 | Common Ignore |
c0220ea4 | 1965 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1966 | |
d9cf932c | 1967 | flra-remat |
eece52b5 | 1968 | Common Var(flag_lra_remat) Optimization |
a7b2e184 | 1969 | Do CFG-sensitive rematerialization in LRA. |
d9cf932c | 1970 | |
d7f09764 | 1971 | flto |
014d92e1 | 1972 | Common |
d7f09764 DN |
1973 | Enable link-time optimization. |
1974 | ||
014d92e1 JH |
1975 | flto= |
1976 | Common RejectNegative Joined Var(flag_lto) | |
1977 | Link-time optimization with number of parallel jobs or jobserver. | |
1978 | ||
783dab6b RB |
1979 | Enum |
1980 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
852e4bd2 | 1981 | |
783dab6b RB |
1982 | EnumValue |
1983 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
852e4bd2 | 1984 | |
783dab6b RB |
1985 | EnumValue |
1986 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
1987 | ||
1988 | EnumValue | |
1989 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
1990 | ||
1991 | EnumValue | |
1992 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
1993 | ||
1994 | EnumValue | |
1995 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
c3c445e1 | 1996 | |
783dab6b RB |
1997 | flto-partition= |
1998 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
a7b2e184 | 1999 | Specify the algorithm to partition symbols and vars at linktime. |
014d92e1 | 2000 | |
d7f09764 DN |
2001 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
2002 | flto-compression-level= | |
87741e51 ML |
2003 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) IntegerRange(0, 19) |
2004 | -flto-compression-level=<number> Use zlib/zstd compression level <number> for IL. | |
d7f09764 | 2005 | |
1ee85ee1 | 2006 | flto-odr-type-merging |
686a56a8 JH |
2007 | Common Ignore |
2008 | Does nothing. Preserved for backward compatibility. | |
1ee85ee1 | 2009 | |
d7f09764 | 2010 | flto-report |
eece52b5 | 2011 | Common Var(flag_lto_report) Init(0) |
a7b2e184 | 2012 | Report various link-time optimization statistics. |
d7f09764 | 2013 | |
057f8f20 | 2014 | flto-report-wpa |
eece52b5 | 2015 | Common Var(flag_lto_report_wpa) Init(0) |
a7b2e184 | 2016 | Report various link-time optimization statistics for WPA only. |
057f8f20 | 2017 | |
6ff3a151 | 2018 | fmath-errno |
eece52b5 | 2019 | Common Var(flag_errno_math) Init(1) Optimization SetByCombined |
a7b2e184 | 2020 | Set errno after built-in math functions. |
6ff3a151 | 2021 | |
3a789837 NF |
2022 | fmax-errors= |
2023 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
a7b2e184 | 2024 | -fmax-errors=<number> Maximum number of errors to report. |
3a789837 | 2025 | |
6ff3a151 | 2026 | fmem-report |
eece52b5 | 2027 | Common Var(mem_report) |
a7b2e184 | 2028 | Report on permanent memory allocation. |
6ff3a151 | 2029 | |
b3e44629 | 2030 | fmem-report-wpa |
eece52b5 | 2031 | Common Var(mem_report_wpa) |
a7b2e184 | 2032 | Report on permanent memory allocation in WPA only. |
b3e44629 | 2033 | |
31b66477 KC |
2034 | ; This will attempt to merge constant section constants, if 1 only |
2035 | ; string constants and constants from constant pool, if 2 also constant | |
2036 | ; variables. | |
6ff3a151 | 2037 | fmerge-all-constants |
eece52b5 | 2038 | Common Var(flag_merge_constants,2) Init(1) |
a7b2e184 | 2039 | Attempt to merge identical constants and constant variables. |
6ff3a151 NB |
2040 | |
2041 | fmerge-constants | |
eece52b5 | 2042 | Common Var(flag_merge_constants,1) |
a7b2e184 | 2043 | Attempt to merge identical constants across compilation units. |
6ff3a151 | 2044 | |
28a08168 | 2045 | fmerge-debug-strings |
eece52b5 | 2046 | Common Var(flag_merge_debug_strings) Init(1) |
a7b2e184 | 2047 | Attempt to merge identical debug strings across compilation units. |
28a08168 | 2048 | |
de32c0cb NB |
2049 | fmessage-length= |
2050 | Common RejectNegative Joined UInteger | |
a7b2e184 | 2051 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping. |
de32c0cb | 2052 | |
e5626198 | 2053 | fmodulo-sched |
eece52b5 | 2054 | Common Var(flag_modulo_sched) Optimization |
a7b2e184 | 2055 | Perform SMS based modulo scheduling before the first scheduling pass. |
e5626198 | 2056 | |
517d76fa | 2057 | fmodulo-sched-allow-regmoves |
eece52b5 | 2058 | Common Var(flag_modulo_sched_allow_regmoves) Optimization |
a7b2e184 | 2059 | Perform SMS based modulo scheduling with register moves allowed. |
517d76fa | 2060 | |
5e962776 | 2061 | fmove-loop-invariants |
eece52b5 | 2062 | Common Var(flag_move_loop_invariants) Optimization |
a7b2e184 | 2063 | Move loop invariant computations out of loops. |
5e962776 | 2064 | |
6fb5fa3c | 2065 | fdce |
6ae4be32 | 2066 | Common Var(flag_dce) Init(1) Optimization |
a7b2e184 | 2067 | Use the RTL dead code elimination pass. |
6fb5fa3c DB |
2068 | |
2069 | fdse | |
c0fe6bce | 2070 | Common Var(flag_dse) Init(0) Optimization |
a7b2e184 | 2071 | Use the RTL dead store elimination pass. |
6fb5fa3c | 2072 | |
d72372e4 | 2073 | freschedule-modulo-scheduled-loops |
eece52b5 | 2074 | Common Var(flag_resched_modulo_sched) Optimization |
a7b2e184 | 2075 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling. |
d72372e4 | 2076 | |
6ff3a151 | 2077 | fnon-call-exceptions |
eece52b5 | 2078 | Common Var(flag_non_call_exceptions) Optimization |
a7b2e184 | 2079 | Support synchronous non-call exceptions. |
6ff3a151 | 2080 | |
c713ddc0 BS |
2081 | foffload= |
2082 | Common Driver Joined MissingArgError(options or targets missing after %qs) | |
b408e010 | 2083 | -foffload=<targets>=<options> Specify offloading targets and options for them. |
c713ddc0 BS |
2084 | |
2085 | foffload-abi= | |
2086 | Common Joined RejectNegative Enum(offload_abi) Var(flag_offload_abi) Init(OFFLOAD_ABI_UNSET) | |
b408e010 | 2087 | -foffload-abi=[lp64|ilp32] Set the ABI to use in an offload compiler. |
c713ddc0 BS |
2088 | |
2089 | Enum | |
2090 | Name(offload_abi) Type(enum offload_abi) UnknownError(unknown offload ABI %qs) | |
2091 | ||
2092 | EnumValue | |
2093 | Enum(offload_abi) String(ilp32) Value(OFFLOAD_ABI_ILP32) | |
2094 | ||
2095 | EnumValue | |
2096 | Enum(offload_abi) String(lp64) Value(OFFLOAD_ABI_LP64) | |
2097 | ||
de32c0cb | 2098 | fomit-frame-pointer |
eece52b5 | 2099 | Common Var(flag_omit_frame_pointer) Optimization |
a7b2e184 | 2100 | When possible do not generate stack frames. |
de32c0cb | 2101 | |
78c60e3d | 2102 | fopt-info |
eece52b5 | 2103 | Common Var(flag_opt_info) Optimization |
a7b2e184 | 2104 | Enable all optimization info dumps on stderr. |
78c60e3d SS |
2105 | |
2106 | fopt-info- | |
2107 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
a7b2e184 | 2108 | -fopt-info[-<type>=filename] Dump compiler optimization details. |
78c60e3d | 2109 | |
4a4412b9 | 2110 | fsave-optimization-record |
eece52b5 | 2111 | Common Var(flag_save_optimization_record) Optimization |
4a4412b9 DM |
2112 | Write a SRCFILE.opt-record.json file detailing what optimizations were performed. |
2113 | ||
6ff3a151 | 2114 | foptimize-register-move |
3b6d1699 VM |
2115 | Common Ignore |
2116 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 2117 | |
de32c0cb | 2118 | foptimize-sibling-calls |
eece52b5 | 2119 | Common Var(flag_optimize_sibling_calls) Optimization |
a7b2e184 | 2120 | Optimize sibling and tail recursive calls. |
de32c0cb | 2121 | |
3e485f62 | 2122 | fpartial-inlining |
eece52b5 | 2123 | Common Var(flag_partial_inlining) Optimization |
a7b2e184 | 2124 | Perform partial inlining. |
3e485f62 | 2125 | |
a5573239 | 2126 | fpre-ipa-mem-report |
eece52b5 | 2127 | Common Var(pre_ipa_mem_report) |
a7b2e184 | 2128 | Report on memory allocation before interprocedural optimization. |
a5573239 JH |
2129 | |
2130 | fpost-ipa-mem-report | |
eece52b5 | 2131 | Common Var(post_ipa_mem_report) |
a7b2e184 | 2132 | Report on memory allocation before interprocedural optimization. |
a5573239 | 2133 | |
6ff3a151 | 2134 | fpack-struct |
eece52b5 | 2135 | Common Var(flag_pack_struct) Optimization |
a7b2e184 | 2136 | Pack structure members together without holes. |
6ff3a151 | 2137 | |
467cecf3 | 2138 | fpack-struct= |
c662432e | 2139 | Common RejectNegative Joined UInteger Optimization |
a7b2e184 | 2140 | -fpack-struct=<number> Set initial maximum structure member alignment. |
467cecf3 | 2141 | |
de32c0cb | 2142 | fpcc-struct-return |
eece52b5 | 2143 | Common Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
a7b2e184 | 2144 | Return small aggregates in memory, not registers. |
de32c0cb NB |
2145 | |
2146 | fpeel-loops | |
eece52b5 | 2147 | Common Var(flag_peel_loops) Optimization |
a7b2e184 | 2148 | Perform loop peeling. |
de32c0cb NB |
2149 | |
2150 | fpeephole | |
eece52b5 | 2151 | Common Var(flag_no_peephole,0) Optimization |
a7b2e184 | 2152 | Enable machine specific peephole optimizations. |
de32c0cb | 2153 | |
6ff3a151 | 2154 | fpeephole2 |
eece52b5 | 2155 | Common Var(flag_peephole2) Optimization |
a7b2e184 | 2156 | Enable an RTL peephole pass before sched2. |
6ff3a151 | 2157 | |
31b66477 | 2158 | fPIC |
eece52b5 | 2159 | Common Var(flag_pic,2) Negative(fPIE) Init(-1) |
a7b2e184 | 2160 | Generate position-independent code if possible (large mode). |
31b66477 KC |
2161 | |
2162 | fPIE | |
eece52b5 | 2163 | Common Var(flag_pie,2) Negative(fpic) Init(-1) |
a7b2e184 | 2164 | Generate position-independent code for executables if possible (large mode). |
31b66477 | 2165 | |
6ff3a151 | 2166 | fpic |
eece52b5 | 2167 | Common Var(flag_pic,1) Negative(fpie) Init(-1) |
a7b2e184 | 2168 | Generate position-independent code if possible (small mode). |
6ff3a151 NB |
2169 | |
2170 | fpie | |
eece52b5 | 2171 | Common Var(flag_pie,1) Negative(fPIC) Init(-1) |
a7b2e184 | 2172 | Generate position-independent code for executables if possible (small mode). |
6ff3a151 | 2173 | |
b91fd3c7 | 2174 | fplt |
eece52b5 | 2175 | Common Var(flag_plt) Init(1) Optimization |
a7b2e184 | 2176 | Use PLT for PIC calls (-fno-plt: load the address from GOT at call site). |
b91fd3c7 | 2177 | |
68a607d8 | 2178 | fplugin= |
21bf1558 | 2179 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 2180 | Specify a plugin to load. |
68a607d8 DN |
2181 | |
2182 | fplugin-arg- | |
21bf1558 | 2183 | Common Joined RejectNegative Var(common_deferred_options) Defer |
a7b2e184 | 2184 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name>. |
68a607d8 | 2185 | |
bbc8a8dc | 2186 | fpredictive-commoning |
eece52b5 | 2187 | Common Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
2188 | Run predictive commoning optimization. |
2189 | ||
de32c0cb | 2190 | fprefetch-loop-arrays |
eece52b5 | 2191 | Common Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
a7b2e184 | 2192 | Generate prefetch instructions, if available, for arrays in loops. |
de32c0cb | 2193 | |
6ff3a151 | 2194 | fprofile |
eece52b5 | 2195 | Common Var(profile_flag) |
a7b2e184 | 2196 | Enable basic program profiling code. |
6ff3a151 | 2197 | |
676519f7 | 2198 | fprofile-abs-path |
eece52b5 | 2199 | Common Var(profile_abs_path_flag) |
676519f7 BE |
2200 | Generate absolute source path names for gcov. |
2201 | ||
6ff3a151 | 2202 | fprofile-arcs |
eece52b5 | 2203 | Common Var(profile_arc_flag) |
a7b2e184 | 2204 | Insert arc-based program profiling code. |
6ff3a151 | 2205 | |
2f908293 | 2206 | fprofile-dir= |
0576d21f | 2207 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
2208 | Set the top-level directory for storing the profile data. |
2209 | The default is 'pwd'. | |
2210 | ||
8e37c995 ML |
2211 | fprofile-note= |
2212 | Common Joined RejectNegative Var(profile_note_location) | |
2213 | Select the name for storing the profile note file. | |
2214 | ||
52c76998 | 2215 | fprofile-correction |
eece52b5 | 2216 | Common Var(flag_profile_correction) |
a7b2e184 | 2217 | Enable correction of flow inconsistent profile data input. |
52c76998 | 2218 | |
22063dbc ML |
2219 | fprofile-update= |
2220 | Common Joined RejectNegative Enum(profile_update) Var(flag_profile_update) Init(PROFILE_UPDATE_SINGLE) | |
4d209853 | 2221 | -fprofile-update=[single|atomic|prefer-atomic] Set the profile update method. |
22063dbc | 2222 | |
e18240ff ML |
2223 | fprofile-filter-files= |
2224 | Common Joined RejectNegative Var(flag_profile_filter_files) | |
8ca43e4e | 2225 | Instrument only functions from files whose name matches any of the regular expressions (separated by semi-colons). |
e18240ff ML |
2226 | |
2227 | fprofile-exclude-files= | |
2228 | Common Joined RejectNegative Var(flag_profile_exclude_files) | |
8ca43e4e | 2229 | Instrument only functions from files whose name does not match any of the regular expressions (separated by semi-colons). |
e18240ff | 2230 | |
ea0b1252 ML |
2231 | Enum |
2232 | Name(profile_reproducibility) Type(enum profile_reproducibility) UnknownError(unknown profile reproducibility method %qs) | |
2233 | ||
2234 | EnumValue | |
2235 | Enum(profile_reproducibility) String(serial) Value(PROFILE_REPRODUCIBILITY_SERIAL) | |
2236 | ||
2237 | EnumValue | |
2238 | Enum(profile_reproducibility) String(parallel-runs) Value(PROFILE_REPRODUCIBILITY_PARALLEL_RUNS) | |
2239 | ||
2240 | EnumValue | |
2241 | Enum(profile_reproducibility) String(multithreaded) Value(PROFILE_REPRODUCIBILITY_MULTITHREADED) | |
2242 | ||
5089df53 | 2243 | fprofile-reproducible= |
ea0b1252 | 2244 | Common Joined RejectNegative Var(flag_profile_reproducible) Enum(profile_reproducibility) Init(PROFILE_REPRODUCIBILITY_SERIAL) |
b408e010 | 2245 | -fprofile-reproducible=[serial|parallel-runs|multithreaded] Control level of reproducibility of profile gathered by -fprofile-generate. |
ea0b1252 | 2246 | |
22063dbc ML |
2247 | Enum |
2248 | Name(profile_update) Type(enum profile_update) UnknownError(unknown profile update method %qs) | |
2249 | ||
2250 | EnumValue | |
2251 | Enum(profile_update) String(single) Value(PROFILE_UPDATE_SINGLE) | |
2252 | ||
2253 | EnumValue | |
2254 | Enum(profile_update) String(atomic) Value(PROFILE_UPDATE_ATOMIC) | |
2255 | ||
4d209853 ML |
2256 | EnumValue |
2257 | Enum(profile_update) String(prefer-atomic) Value(PROFILE_UPDATE_PREFER_ATOMIC) | |
2258 | ||
44b32683 JH |
2259 | fprofile-prefix-path= |
2260 | Common Joined RejectNegative Var(profile_prefix_path) | |
850322df | 2261 | Remove prefix from absolute path before mangling name for -fprofile-generate= and -fprofile-use=. |
44b32683 | 2262 | |
a8a5f53a JH |
2263 | fprofile-generate |
2264 | Common | |
a7b2e184 | 2265 | Enable common options for generating profile info for profile feedback directed optimizations. |
a8a5f53a | 2266 | |
2f908293 SP |
2267 | fprofile-generate= |
2268 | Common Joined RejectNegative | |
a7b2e184 | 2269 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir=. |
2f908293 | 2270 | |
27f7fb79 SH |
2271 | fprofile-info-section |
2272 | Common RejectNegative | |
2273 | Register the profile information in the .gcov_info section instead of using a constructor/destructor. | |
2274 | ||
2275 | fprofile-info-section= | |
2276 | Common Joined RejectNegative Var(profile_info_section) | |
2277 | Register the profile information in the specified section instead of using a constructor/destructor. | |
2278 | ||
34fbe3f0 | 2279 | fprofile-partial-training |
eece52b5 | 2280 | Common Var(flag_profile_partial_training) Optimization |
c86b722b | 2281 | Do not assume that functions never executed during the train run are cold. |
34fbe3f0 | 2282 | |
a8a5f53a | 2283 | fprofile-use |
2f908293 | 2284 | Common Var(flag_profile_use) |
a7b2e184 | 2285 | Enable common options for performing profile feedback directed optimizations. |
a8a5f53a | 2286 | |
2f908293 SP |
2287 | fprofile-use= |
2288 | Common Joined RejectNegative | |
a7b2e184 | 2289 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir=. |
2f908293 | 2290 | |
fca9dc00 | 2291 | fprofile-values |
eece52b5 | 2292 | Common Var(flag_profile_values) |
a7b2e184 | 2293 | Insert code to profile values of expressions. |
fca9dc00 | 2294 | |
37e5402b | 2295 | fprofile-report |
eece52b5 | 2296 | Common Var(profile_report) |
a7b2e184 | 2297 | Report on consistency of profile. |
37e5402b | 2298 | |
9cec31f4 | 2299 | fprofile-reorder-functions |
eece52b5 | 2300 | Common Var(flag_profile_reorder_functions) Optimization |
a7b2e184 | 2301 | Enable function reordering that improves code placement. |
9cec31f4 | 2302 | |
417ca011 | 2303 | fpatchable-function-entry= |
0d701e3e | 2304 | Common Var(flag_patchable_function_entry) Joined Optimization |
417ca011 TD |
2305 | Insert NOP instructions at each function entry. |
2306 | ||
de32c0cb | 2307 | frandom-seed |
299404a1 | 2308 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
2309 | |
2310 | frandom-seed= | |
299404a1 | 2311 | Common Joined RejectNegative Var(common_deferred_options) Defer |
4bfede85 | 2312 | -frandom-seed=<string> Make compile reproducible using <string>. |
de32c0cb | 2313 | |
e0d9d0dd NC |
2314 | ; This switch causes the command line that was used to create an |
2315 | ; object file to be recorded into the object file. The exact format | |
2316 | ; of this recording is target and binary file format dependent. | |
2317 | ; It is related to the -fverbose-asm switch, but that switch only | |
2318 | ; records information in the assembler output file as comments, so | |
2319 | ; they never reach the object file. | |
2320 | frecord-gcc-switches | |
eece52b5 | 2321 | Common Var(flag_record_gcc_switches) |
e0d9d0dd NC |
2322 | Record gcc command line switches in the object file. |
2323 | ||
de32c0cb | 2324 | freg-struct-return |
eece52b5 | 2325 | Common Var(flag_pcc_struct_return,0) Optimization |
a7b2e184 | 2326 | Return small aggregates in registers. |
de32c0cb | 2327 | |
6ff3a151 | 2328 | fregmove |
3b6d1699 VM |
2329 | Common Ignore |
2330 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 2331 | |
f522930c | 2332 | flifetime-dse |
eece52b5 | 2333 | Common Var(flag_lifetime_dse,2) Init(2) Optimization |
f522930c JM |
2334 | Tell DSE that the storage for a C++ object is dead when the constructor |
2335 | starts and when the destructor finishes. | |
2336 | ||
a021961c | 2337 | flifetime-dse= |
63010089 | 2338 | Common Joined RejectNegative UInteger Var(flag_lifetime_dse) Optimization IntegerRange(0, 2) |
a021961c | 2339 | |
6fd6a2ff QZ |
2340 | flive-patching |
2341 | Common RejectNegative Alias(flive-patching=,inline-clone) Optimization | |
2342 | ||
2343 | flive-patching= | |
eece52b5 | 2344 | Common Joined RejectNegative Enum(live_patching_level) Var(flag_live_patching) Init(LIVE_PATCHING_NONE) Optimization |
6fd6a2ff QZ |
2345 | -flive-patching=[inline-only-static|inline-clone] Control IPA |
2346 | optimizations to provide a safe compilation for live-patching. At the same | |
2347 | time, provides multiple-level control on the enabled IPA optimizations. | |
2348 | ||
2349 | Enum | |
2350 | Name(live_patching_level) Type(enum live_patching_level) UnknownError(unknown Live-Patching Level %qs) | |
2351 | ||
2352 | EnumValue | |
2353 | Enum(live_patching_level) String(inline-only-static) Value(LIVE_PATCHING_INLINE_ONLY_STATIC) | |
2354 | ||
2355 | EnumValue | |
2356 | Enum(live_patching_level) String(inline-clone) Value(LIVE_PATCHING_INLINE_CLONE) | |
2357 | ||
6343b6bf | 2358 | fallocation-dce |
eece52b5 | 2359 | Common Var(flag_allocation_dce) Init(1) Optimization |
6343b6bf ML |
2360 | Tell DCE to remove unused C++ allocations. |
2361 | ||
f20f2613 | 2362 | flive-range-shrinkage |
eece52b5 | 2363 | Common Var(flag_live_range_shrinkage) Init(0) Optimization |
a7b2e184 | 2364 | Relief of register pressure through live range shrinkage. |
f20f2613 | 2365 | |
6ff3a151 | 2366 | frename-registers |
eece52b5 | 2367 | Common Var(flag_rename_registers) Init(2) Optimization |
a7b2e184 | 2368 | Perform a register renaming optimization pass. |
6ff3a151 | 2369 | |
b16abbcb | 2370 | fschedule-fusion |
eece52b5 | 2371 | Common Var(flag_schedule_fusion) Init(2) Optimization |
a7b2e184 | 2372 | Perform a target dependent instruction fusion optimization pass. |
b16abbcb | 2373 | |
6ff3a151 | 2374 | freorder-blocks |
eece52b5 | 2375 | Common Var(flag_reorder_blocks) Optimization |
a7b2e184 | 2376 | Reorder basic blocks to improve code placement. |
6ff3a151 | 2377 | |
59faab7c SB |
2378 | freorder-blocks-algorithm= |
2379 | Common Joined RejectNegative Enum(reorder_blocks_algorithm) Var(flag_reorder_blocks_algorithm) Init(REORDER_BLOCKS_ALGORITHM_SIMPLE) Optimization | |
6a825afe | 2380 | -freorder-blocks-algorithm=[simple|stc] Set the used basic block reordering algorithm. |
59faab7c SB |
2381 | |
2382 | Enum | |
2383 | Name(reorder_blocks_algorithm) Type(enum reorder_blocks_algorithm) UnknownError(unknown basic block reordering algorithm %qs) | |
2384 | ||
2385 | EnumValue | |
2386 | Enum(reorder_blocks_algorithm) String(simple) Value(REORDER_BLOCKS_ALGORITHM_SIMPLE) | |
2387 | ||
2388 | EnumValue | |
2389 | Enum(reorder_blocks_algorithm) String(stc) Value(REORDER_BLOCKS_ALGORITHM_STC) | |
2390 | ||
750054a2 | 2391 | freorder-blocks-and-partition |
eece52b5 | 2392 | Common Var(flag_reorder_blocks_and_partition) Optimization |
a7b2e184 | 2393 | Reorder basic blocks and partition into hot and cold sections. |
750054a2 | 2394 | |
6ff3a151 | 2395 | freorder-functions |
eece52b5 | 2396 | Common Var(flag_reorder_functions) Optimization |
a7b2e184 | 2397 | Reorder functions to improve code placement. |
6ff3a151 | 2398 | |
de32c0cb | 2399 | frerun-cse-after-loop |
eece52b5 | 2400 | Common Var(flag_rerun_cse_after_loop) Optimization |
a7b2e184 | 2401 | Add a common subexpression elimination pass after loop optimizations. |
de32c0cb | 2402 | |
efa1cdf0 | 2403 | frerun-loop-opt |
2d2bd949 | 2404 | Common Ignore |
c0220ea4 | 2405 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 2406 | |
039c3d42 | 2407 | frounding-math |
eece52b5 | 2408 | Common Var(flag_rounding_math) Optimization SetByCombined |
a7b2e184 | 2409 | Disable optimizations that assume default FP rounding behavior. |
039c3d42 | 2410 | |
6ff3a151 | 2411 | fsched-interblock |
eece52b5 | 2412 | Common Var(flag_schedule_interblock) Init(1) Optimization |
a7b2e184 | 2413 | Enable scheduling across basic blocks. |
6ff3a151 | 2414 | |
ce18efcb | 2415 | fsched-pressure |
eece52b5 | 2416 | Common Var(flag_sched_pressure) Init(0) Optimization |
a7b2e184 | 2417 | Enable register pressure sensitive insn scheduling. |
ce18efcb | 2418 | |
6ff3a151 | 2419 | fsched-spec |
eece52b5 | 2420 | Common Var(flag_schedule_speculative) Init(1) Optimization |
a7b2e184 | 2421 | Allow speculative motion of non-loads. |
6ff3a151 NB |
2422 | |
2423 | fsched-spec-load | |
eece52b5 | 2424 | Common Var(flag_schedule_speculative_load) Optimization |
a7b2e184 | 2425 | Allow speculative motion of some loads. |
6ff3a151 NB |
2426 | |
2427 | fsched-spec-load-dangerous | |
eece52b5 | 2428 | Common Var(flag_schedule_speculative_load_dangerous) Optimization |
a7b2e184 | 2429 | Allow speculative motion of more loads. |
6ff3a151 | 2430 | |
de32c0cb | 2431 | fsched-verbose= |
4111f1c9 | 2432 | Common RejectNegative Joined UInteger Var(sched_verbose_param) Init(1) |
a7b2e184 | 2433 | -fsched-verbose=<number> Set the verbosity level of the scheduler. |
de32c0cb | 2434 | |
6ff3a151 | 2435 | fsched2-use-superblocks |
eece52b5 | 2436 | Common Var(flag_sched2_use_superblocks) Optimization |
a7b2e184 | 2437 | If scheduling post reload, do superblock scheduling. |
6ff3a151 NB |
2438 | |
2439 | fsched2-use-traces | |
2d2bd949 | 2440 | Common Ignore |
57257f0d | 2441 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 2442 | |
de32c0cb | 2443 | fschedule-insns |
eece52b5 | 2444 | Common Var(flag_schedule_insns) Optimization |
a7b2e184 | 2445 | Reschedule instructions before register allocation. |
de32c0cb NB |
2446 | |
2447 | fschedule-insns2 | |
eece52b5 | 2448 | Common Var(flag_schedule_insns_after_reload) Optimization |
a7b2e184 | 2449 | Reschedule instructions after register allocation. |
de32c0cb | 2450 | |
e855c69d AB |
2451 | ; This flag should be on when a target implements non-trivial |
2452 | ; scheduling hooks, maybe saving some information for its own sake. | |
a7b2e184 | 2453 | ; On IA64, for example, this is used for correct bundling. |
e855c69d | 2454 | fselective-scheduling |
eece52b5 | 2455 | Common Var(flag_selective_scheduling) Optimization |
a7b2e184 | 2456 | Schedule instructions using selective scheduling algorithm. |
e855c69d AB |
2457 | |
2458 | fselective-scheduling2 | |
eece52b5 | 2459 | Common Var(flag_selective_scheduling2) Optimization |
a7b2e184 | 2460 | Run selective scheduling after reload. |
e855c69d | 2461 | |
ecfc21ff DM |
2462 | fself-test= |
2463 | Common Undocumented Joined Var(flag_self_test) | |
2464 | Run self-tests, using the given path to locate test files. | |
d9b950dd | 2465 | |
e855c69d | 2466 | fsel-sched-pipelining |
eece52b5 | 2467 | Common Var(flag_sel_sched_pipelining) Init(0) Optimization |
a7b2e184 | 2468 | Perform software pipelining of inner loops during selective scheduling. |
e855c69d AB |
2469 | |
2470 | fsel-sched-pipelining-outer-loops | |
eece52b5 | 2471 | Common Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization |
a7b2e184 | 2472 | Perform software pipelining of outer loops during selective scheduling. |
e855c69d AB |
2473 | |
2474 | fsel-sched-reschedule-pipelined | |
eece52b5 | 2475 | Common Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization |
a7b2e184 | 2476 | Reschedule pipelined regions without pipelining. |
e855c69d | 2477 | |
e288a46c | 2478 | fsemantic-interposition |
eece52b5 | 2479 | Common Var(flag_semantic_interposition) Init(1) |
a7b2e184 | 2480 | Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker. |
e288a46c | 2481 | |
31b66477 KC |
2482 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
2483 | ; of stalled insns into the ready list. | |
569fa502 | 2484 | fsched-stalled-insns |
eece52b5 | 2485 | Common Var(flag_sched_stalled_insns) Optimization UInteger |
a7b2e184 | 2486 | Allow premature scheduling of queued insns. |
569fa502 DN |
2487 | |
2488 | fsched-stalled-insns= | |
b16650ac | 2489 | Common RejectNegative Joined UInteger Optimization |
a7b2e184 | 2490 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled. |
569fa502 | 2491 | |
31b66477 KC |
2492 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
2493 | ; be examined for a dependency on a stalled insn that is candidate for | |
2494 | ; premature removal from the queue of stalled insns into the ready list (has | |
2495 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 2496 | fsched-stalled-insns-dep |
eece52b5 | 2497 | Common Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
a7b2e184 | 2498 | Set dependence distance checking in premature scheduling of queued insns. |
569fa502 DN |
2499 | |
2500 | fsched-stalled-insns-dep= | |
b16650ac | 2501 | Common RejectNegative Joined UInteger Optimization |
a7b2e184 | 2502 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns. |
569fa502 | 2503 | |
ee4764a8 | 2504 | fsched-group-heuristic |
eece52b5 | 2505 | Common Var(flag_sched_group_heuristic) Init(1) Optimization |
a7b2e184 | 2506 | Enable the group heuristic in the scheduler. |
ee4764a8 GS |
2507 | |
2508 | fsched-critical-path-heuristic | |
eece52b5 | 2509 | Common Var(flag_sched_critical_path_heuristic) Init(1) Optimization |
a7b2e184 | 2510 | Enable the critical path heuristic in the scheduler. |
ee4764a8 GS |
2511 | |
2512 | fsched-spec-insn-heuristic | |
eece52b5 | 2513 | Common Var(flag_sched_spec_insn_heuristic) Init(1) Optimization |
a7b2e184 | 2514 | Enable the speculative instruction heuristic in the scheduler. |
ee4764a8 | 2515 | |
ee4764a8 | 2516 | fsched-rank-heuristic |
eece52b5 | 2517 | Common Var(flag_sched_rank_heuristic) Init(1) Optimization |
a7b2e184 | 2518 | Enable the rank heuristic in the scheduler. |
ee4764a8 GS |
2519 | |
2520 | fsched-last-insn-heuristic | |
eece52b5 | 2521 | Common Var(flag_sched_last_insn_heuristic) Init(1) Optimization |
a7b2e184 | 2522 | Enable the last instruction heuristic in the scheduler. |
ee4764a8 GS |
2523 | |
2524 | fsched-dep-count-heuristic | |
eece52b5 | 2525 | Common Var(flag_sched_dep_count_heuristic) Init(1) Optimization |
a7b2e184 | 2526 | Enable the dependent count heuristic in the scheduler. |
ee4764a8 | 2527 | |
aacd3885 | 2528 | fsection-anchors |
eece52b5 | 2529 | Common Var(flag_section_anchors) Optimization |
a7b2e184 | 2530 | Access data in the same section from shared anchor points. |
aacd3885 | 2531 | |
8cd37d0b | 2532 | fsee |
2d2bd949 | 2533 | Common Ignore |
8393a9c8 | 2534 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 2535 | |
87a0ebfd | 2536 | fzee |
26cd9add EI |
2537 | Common Ignore |
2538 | Does nothing. Preserved for backward compatibility. | |
2539 | ||
2540 | free | |
eece52b5 | 2541 | Common Var(flag_ree) Init(0) Optimization |
26cd9add | 2542 | Turn on Redundant Extensions Elimination pass. |
87a0ebfd | 2543 | |
8abb6b22 | 2544 | fshow-column |
eece52b5 | 2545 | Common Var(flag_show_column) Init(1) |
a7b2e184 | 2546 | Show column numbers in diagnostics, when available. Default on. |
8abb6b22 | 2547 | |
484db665 | 2548 | fshrink-wrap |
eece52b5 | 2549 | Common Var(flag_shrink_wrap) Optimization |
484db665 BS |
2550 | Emit function prologues only before parts of the function that need it, |
2551 | rather than at the top of the function. | |
2552 | ||
20a6ece0 | 2553 | fshrink-wrap-separate |
eece52b5 | 2554 | Common Var(flag_shrink_wrap_separate) Init(1) Optimization |
20a6ece0 SB |
2555 | Shrink-wrap parts of the prologue and epilogue separately. |
2556 | ||
6ff3a151 | 2557 | fsignaling-nans |
eece52b5 | 2558 | Common Var(flag_signaling_nans) Optimization SetByCombined |
a7b2e184 | 2559 | Disable optimizations observable by IEEE signaling NaNs. |
6ff3a151 | 2560 | |
db02da79 | 2561 | fsigned-zeros |
eece52b5 | 2562 | Common Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
a7b2e184 | 2563 | Disable floating point optimizations that ignore the IEEE signedness of zero. |
db02da79 | 2564 | |
6ff3a151 | 2565 | fsingle-precision-constant |
eece52b5 | 2566 | Common Var(flag_single_precision_constant) Optimization |
a7b2e184 | 2567 | Convert floating point constants to single precision constants. |
6ff3a151 | 2568 | |
113d659a | 2569 | fsplit-ivs-in-unroller |
eece52b5 | 2570 | Common Var(flag_split_ivs_in_unroller) Init(1) Optimization |
a7b2e184 | 2571 | Split lifetimes of induction variables when loops are unrolled. |
113d659a | 2572 | |
7458026b | 2573 | fsplit-stack |
eece52b5 | 2574 | Common Var(flag_split_stack) Init(-1) |
a7b2e184 | 2575 | Generate discontiguous stack frames. |
7458026b | 2576 | |
e53a16e7 | 2577 | fsplit-wide-types |
eece52b5 | 2578 | Common Var(flag_split_wide_types) Optimization |
a7b2e184 | 2579 | Split wide types into independent registers. |
e53a16e7 | 2580 | |
b18081df | 2581 | fsplit-wide-types-early |
eece52b5 | 2582 | Common Var(flag_split_wide_types_early) Optimization |
b18081df SB |
2583 | Split wide types into independent registers earlier. |
2584 | ||
6a75d560 | 2585 | fssa-backprop |
eece52b5 | 2586 | Common Var(flag_ssa_backprop) Init(1) Optimization |
6a75d560 RS |
2587 | Enable backward propagation of use properties at the SSA level. |
2588 | ||
68f6df73 | 2589 | fssa-phiopt |
eece52b5 | 2590 | Common Var(flag_ssa_phiopt) Optimization |
a7b2e184 | 2591 | Optimize conditional patterns using SSA PHI nodes. |
68f6df73 | 2592 | |
98ce9490 | 2593 | fstdarg-opt |
eece52b5 | 2594 | Common Var(flag_stdarg_opt) Init(1) Optimization |
a7b2e184 | 2595 | Optimize amount of stdarg registers saved to stack at start of function. |
98ce9490 | 2596 | |
f37a4f14 | 2597 | fvariable-expansion-in-unroller |
eece52b5 | 2598 | Common Var(flag_variable_expansion_in_unroller) Optimization |
a7b2e184 | 2599 | Apply variable expansion when loops are unrolled. |
f37a4f14 | 2600 | |
b38f3813 | 2601 | fstack-check= |
eece52b5 | 2602 | Common RejectNegative Joined Optimization |
a7b2e184 | 2603 | -fstack-check=[no|generic|specific] Insert stack checking code into the program. |
b38f3813 | 2604 | |
6ff3a151 | 2605 | fstack-check |
5de8299c | 2606 | Common Alias(fstack-check=, specific, no) |
a7b2e184 | 2607 | Insert stack checking code into the program. Same as -fstack-check=specific. |
6ff3a151 | 2608 | |
ee8f15c6 | 2609 | fstack-clash-protection |
eece52b5 | 2610 | Common Var(flag_stack_clash_protection) Optimization |
ee8f15c6 JL |
2611 | Insert code to probe each page of stack space as it is allocated to protect |
2612 | from stack-clash style attacks. | |
2613 | ||
de32c0cb | 2614 | fstack-limit |
21bf1558 | 2615 | Common Var(common_deferred_options) Defer |
de32c0cb | 2616 | |
058de654 | 2617 | fstack-limit-register= |
21bf1558 | 2618 | Common RejectNegative Joined Var(common_deferred_options) Defer |
a7b2e184 | 2619 | -fstack-limit-register=<register> Trap if the stack goes past <register>. |
058de654 NB |
2620 | |
2621 | fstack-limit-symbol= | |
21bf1558 | 2622 | Common RejectNegative Joined Var(common_deferred_options) Defer |
a7b2e184 | 2623 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name>. |
058de654 | 2624 | |
7d69de61 | 2625 | fstack-protector |
eece52b5 | 2626 | Common Var(flag_stack_protect, 1) Init(-1) Optimization |
a7b2e184 | 2627 | Use propolice as a stack protection method. |
7d69de61 RH |
2628 | |
2629 | fstack-protector-all | |
eece52b5 | 2630 | Common RejectNegative Var(flag_stack_protect, 2) Init(-1) Optimization |
a7b2e184 | 2631 | Use a stack protection method for every function. |
7d69de61 | 2632 | |
f6bc1c4a | 2633 | fstack-protector-strong |
eece52b5 | 2634 | Common RejectNegative Var(flag_stack_protect, 3) Init(-1) Optimization |
a7b2e184 | 2635 | Use a smart stack protection method for certain functions. |
f6bc1c4a | 2636 | |
5434dc07 | 2637 | fstack-protector-explicit |
eece52b5 | 2638 | Common RejectNegative Var(flag_stack_protect, 4) Optimization |
a7b2e184 | 2639 | Use stack protection method only for functions with the stack_protect attribute. |
5434dc07 | 2640 | |
d3c12306 EB |
2641 | fstack-usage |
2642 | Common RejectNegative Var(flag_stack_usage) | |
a7b2e184 | 2643 | Output stack usage information on a per-function basis. |
d3c12306 | 2644 | |
de32c0cb | 2645 | fstrength-reduce |
2d2bd949 | 2646 | Common Ignore |
c0220ea4 | 2647 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 2648 | |
31b66477 KC |
2649 | ; Nonzero if we should do (language-dependent) alias analysis. |
2650 | ; Typically, this analysis will assume that expressions of certain | |
2651 | ; types do not alias expressions of certain other types. Only used | |
2652 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 2653 | fstrict-aliasing |
eece52b5 | 2654 | Common Var(flag_strict_aliasing) Optimization |
a7b2e184 | 2655 | Assume strict aliasing rules apply. |
6ff3a151 | 2656 | |
eeef0e45 | 2657 | fstrict-overflow |
eece52b5 | 2658 | Common |
3fccbb9e | 2659 | Treat signed overflow as undefined. Negated as -fwrapv -fwrapv-pointer. |
eeef0e45 | 2660 | |
e8053cf5 | 2661 | fsync-libcalls |
eece52b5 | 2662 | Common Var(flag_sync_libcalls) Init(1) |
a7b2e184 | 2663 | Implement __atomic operations via libcalls to legacy __sync functions. |
e8053cf5 | 2664 | |
de32c0cb | 2665 | fsyntax-only |
eece52b5 | 2666 | Common Var(flag_syntax_only) |
a7b2e184 | 2667 | Check for syntax errors, then stop. |
de32c0cb | 2668 | |
6ff3a151 | 2669 | ftest-coverage |
eece52b5 | 2670 | Common Var(flag_test_coverage) |
a7b2e184 | 2671 | Create data files needed by \"gcov\". |
6ff3a151 | 2672 | |
de32c0cb | 2673 | fthread-jumps |
eece52b5 | 2674 | Common Var(flag_thread_jumps) Optimization |
a7b2e184 | 2675 | Perform jump threading optimizations. |
de32c0cb | 2676 | |
6ff3a151 | 2677 | ftime-report |
eece52b5 | 2678 | Common Var(time_report) |
a7b2e184 | 2679 | Report the time taken by each compiler pass. |
6ff3a151 | 2680 | |
8df06bd0 | 2681 | ftime-report-details |
eece52b5 | 2682 | Common Var(time_report_details) |
8df06bd0 RB |
2683 | Record times taken by sub-phases separately. |
2684 | ||
058de654 | 2685 | ftls-model= |
e6d4b984 | 2686 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
a7b2e184 | 2687 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model. |
058de654 | 2688 | |
e6d4b984 JM |
2689 | Enum |
2690 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2691 | ||
2692 | EnumValue | |
2693 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2694 | ||
2695 | EnumValue | |
2696 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2697 | ||
2698 | EnumValue | |
2699 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2700 | ||
2701 | EnumValue | |
2702 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2703 | ||
474eccc6 | 2704 | ftoplevel-reorder |
eece52b5 | 2705 | Common Var(flag_toplevel_reorder) Init(2) Optimization |
a7b2e184 | 2706 | Reorder top level functions, variables, and asms. |
474eccc6 | 2707 | |
de32c0cb | 2708 | ftracer |
eece52b5 | 2709 | Common Var(flag_tracer) Optimization |
a7b2e184 | 2710 | Perform superblock formation via tail duplication. |
de32c0cb | 2711 | |
4c640e26 | 2712 | ftrampolines |
eece52b5 | 2713 | Common Var(flag_trampolines) Init(0) |
4c640e26 EB |
2714 | For targets that normally need trampolines for nested functions, always |
2715 | generate them instead of using descriptors. | |
2716 | ||
31b66477 KC |
2717 | ; Zero means that floating-point math operations cannot generate a |
2718 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2719 | ; IEEE 754 arithmetic. | |
6ff3a151 | 2720 | ftrapping-math |
eece52b5 | 2721 | Common Var(flag_trapping_math) Init(1) Optimization SetByCombined |
a7b2e184 | 2722 | Assume floating-point operations can trap. |
6ff3a151 NB |
2723 | |
2724 | ftrapv | |
eece52b5 | 2725 | Common Var(flag_trapv) Optimization |
a7b2e184 | 2726 | Trap for signed overflow in addition, subtraction and multiplication. |
6ff3a151 | 2727 | |
6de9cd9a | 2728 | ftree-ccp |
eece52b5 | 2729 | Common Var(flag_tree_ccp) Optimization |
a7b2e184 | 2730 | Enable SSA-CCP optimization on trees. |
6de9cd9a | 2731 | |
0b4b14ac | 2732 | ftree-bit-ccp |
eece52b5 | 2733 | Common Var(flag_tree_bit_ccp) Optimization |
a7b2e184 | 2734 | Enable SSA-BIT-CCP optimization on trees. |
0b4b14ac | 2735 | |
0bca51f0 | 2736 | ftree-store-ccp |
2d2bd949 | 2737 | Common Ignore |
dce2b2f6 | 2738 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2739 | |
6de9cd9a | 2740 | ftree-ch |
eece52b5 | 2741 | Common Var(flag_tree_ch) Optimization |
a7b2e184 | 2742 | Enable loop header copying on trees. |
6de9cd9a | 2743 | |
21d01365 | 2744 | ftree-coalesce-inlined-vars |
1f9ceff1 AO |
2745 | Common Ignore RejectNegative |
2746 | Does nothing. Preserved for backward compatibility. | |
21d01365 AO |
2747 | |
2748 | ftree-coalesce-vars | |
eece52b5 | 2749 | Common Var(flag_tree_coalesce_vars) Optimization |
a7b2e184 | 2750 | Enable SSA coalescing of user variables. |
21d01365 | 2751 | |
6de9cd9a | 2752 | ftree-copyrename |
1f9ceff1 AO |
2753 | Common Ignore |
2754 | Does nothing. Preserved for backward compatibility. | |
6de9cd9a | 2755 | |
0bca51f0 | 2756 | ftree-copy-prop |
eece52b5 | 2757 | Common Var(flag_tree_copy_prop) Optimization |
a7b2e184 | 2758 | Enable copy propagation on trees. |
0bca51f0 DN |
2759 | |
2760 | ftree-store-copy-prop | |
2d2bd949 | 2761 | Common Ignore |
e9033855 | 2762 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2763 | |
a5828d1e | 2764 | ftree-cselim |
eece52b5 | 2765 | Common Var(flag_tree_cselim) Init(2) Optimization |
a7b2e184 | 2766 | Transform condition stores into unconditional ones. |
a5828d1e | 2767 | |
b6e99746 | 2768 | ftree-switch-conversion |
eece52b5 | 2769 | Common Var(flag_tree_switch_conversion) Optimization |
b6e99746 MJ |
2770 | Perform conversions of switch initializations. |
2771 | ||
6de9cd9a | 2772 | ftree-dce |
eece52b5 | 2773 | Common Var(flag_tree_dce) Optimization |
a7b2e184 | 2774 | Enable SSA dead code elimination optimization on trees. |
6de9cd9a DN |
2775 | |
2776 | ftree-dominator-opts | |
eece52b5 | 2777 | Common Var(flag_tree_dom) Optimization |
a7b2e184 | 2778 | Enable dominator optimizations. |
6de9cd9a | 2779 | |
c9e93168 | 2780 | ftree-tail-merge |
eece52b5 | 2781 | Common Var(flag_tree_tail_merge) Optimization |
a7b2e184 | 2782 | Enable tail merging on trees. |
c9e93168 | 2783 | |
6de9cd9a | 2784 | ftree-dse |
eece52b5 | 2785 | Common Var(flag_tree_dse) Optimization |
a7b2e184 | 2786 | Enable dead store elimination. |
6de9cd9a | 2787 | |
248fc9f3 | 2788 | ftree-forwprop |
eece52b5 | 2789 | Common Var(flag_tree_forwprop) Init(1) Optimization |
a7b2e184 | 2790 | Enable forward propagation on trees. |
248fc9f3 | 2791 | |
ff2ad0f7 | 2792 | ftree-fre |
eece52b5 | 2793 | Common Var(flag_tree_fre) Optimization |
a7b2e184 | 2794 | Enable Full Redundancy Elimination (FRE) on trees. |
ff2ad0f7 | 2795 | |
8b57bfeb | 2796 | foptimize-strlen |
eece52b5 | 2797 | Common Var(flag_optimize_strlen) Optimization |
a7b2e184 | 2798 | Enable string length optimizations on trees. |
8b57bfeb | 2799 | |
ae93744d | 2800 | fisolate-erroneous-paths-dereference |
eece52b5 | 2801 | Common Var(flag_isolate_erroneous_paths_dereference) Optimization |
408e8aa4 SL |
2802 | Detect paths that trigger erroneous or undefined behavior due to |
2803 | dereferencing a null pointer. Isolate those paths from the main control | |
2804 | flow and turn the statement with erroneous or undefined behavior into a trap. | |
ae93744d JL |
2805 | |
2806 | fisolate-erroneous-paths-attribute | |
eece52b5 | 2807 | Common Var(flag_isolate_erroneous_paths_attribute) Optimization |
51956afe | 2808 | Detect paths that trigger erroneous or undefined behavior due to a null value |
408e8aa4 | 2809 | being used in a way forbidden by a returns_nonnull or nonnull |
ae93744d | 2810 | attribute. Isolate those paths from the main control flow and turn the |
a7b2e184 | 2811 | statement with erroneous or undefined behavior into a trap. |
8fdc414d | 2812 | |
dea61d92 | 2813 | ftree-loop-distribution |
eece52b5 | 2814 | Common Var(flag_tree_loop_distribution) Optimization |
a7b2e184 | 2815 | Enable loop distribution on trees. |
dea61d92 | 2816 | |
20769d5e | 2817 | ftree-loop-distribute-patterns |
eece52b5 | 2818 | Common Var(flag_tree_loop_distribute_patterns) Optimization |
a7b2e184 | 2819 | Enable loop distribution for patterns transformed into a library call. |
20769d5e | 2820 | |
1b08d87d | 2821 | ftree-loop-im |
eece52b5 | 2822 | Common Var(flag_tree_loop_im) Init(1) Optimization |
a7b2e184 | 2823 | Enable loop invariant motion on trees. |
a7e5372d | 2824 | |
599eabdb | 2825 | ftree-loop-linear |
d6bb5ccf | 2826 | Common Alias(floop-nest-optimize) |
a7b2e184 | 2827 | Enable loop nest transforms. Same as -floop-nest-optimize. |
599eabdb | 2828 | |
1b08d87d | 2829 | ftree-loop-ivcanon |
eece52b5 | 2830 | Common Var(flag_tree_loop_ivcanon) Init(1) Optimization |
a7b2e184 | 2831 | Create canonical induction variables in loops. |
1b08d87d | 2832 | |
c66b6c66 | 2833 | ftree-loop-optimize |
eece52b5 | 2834 | Common Var(flag_tree_loop_optimize) Init(1) Optimization |
a7b2e184 | 2835 | Enable loop optimizations on tree level. |
c66b6c66 | 2836 | |
5f40b3cb | 2837 | ftree-parallelize-loops= |
eece52b5 | 2838 | Common Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) Optimization |
9453ba0a | 2839 | -ftree-parallelize-loops=<number> Enable automatic parallelization of loops. |
5f40b3cb | 2840 | |
248fc9f3 | 2841 | ftree-phiprop |
eece52b5 | 2842 | Common Var(flag_tree_phiprop) Init(1) Optimization |
248fc9f3 RG |
2843 | Enable hoisting loads from conditional pointers. |
2844 | ||
6de9cd9a | 2845 | ftree-pre |
eece52b5 | 2846 | Common Var(flag_tree_pre) Optimization |
a7b2e184 | 2847 | Enable SSA-PRE optimization on trees. |
6de9cd9a | 2848 | |
fa06ad0d | 2849 | ftree-partial-pre |
eece52b5 | 2850 | Common Var(flag_tree_partial_pre) Optimization |
a7b2e184 | 2851 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination. |
fa06ad0d | 2852 | |
248fc9f3 | 2853 | ftree-pta |
eece52b5 | 2854 | Common Var(flag_tree_pta) Optimization |
248fc9f3 RG |
2855 | Perform function-local points-to analysis on trees. |
2856 | ||
13c59415 | 2857 | ftree-reassoc |
eece52b5 | 2858 | Common Var(flag_tree_reassoc) Init(1) Optimization |
a7b2e184 | 2859 | Enable reassociation on tree level. |
13c59415 | 2860 | |
c75ab022 | 2861 | ftree-salias |
2d2bd949 | 2862 | Common Ignore |
1353232d | 2863 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 2864 | |
fa555252 | 2865 | ftree-sink |
eece52b5 | 2866 | Common Var(flag_tree_sink) Optimization |
a7b2e184 | 2867 | Enable SSA code sinking on trees. |
fa555252 | 2868 | |
75cfe445 | 2869 | ftree-slsr |
eece52b5 | 2870 | Common Var(flag_tree_slsr) Optimization |
a7b2e184 | 2871 | Perform straight-line strength reduction. |
75cfe445 | 2872 | |
6de9cd9a | 2873 | ftree-sra |
eece52b5 | 2874 | Common Var(flag_tree_sra) Optimization |
a7b2e184 | 2875 | Perform scalar replacement of aggregates. |
6de9cd9a DN |
2876 | |
2877 | ftree-ter | |
eece52b5 | 2878 | Common Var(flag_tree_ter) Optimization |
a7b2e184 | 2879 | Replace temporary expressions in the SSA->normal pass. |
6de9cd9a | 2880 | |
c662432e | 2881 | ftree-lrs |
eece52b5 | 2882 | Common Var(flag_tree_live_range_split) Optimization |
a7b2e184 | 2883 | Perform live range splitting during the SSA->normal pass. |
c662432e | 2884 | |
0bca51f0 | 2885 | ftree-vrp |
eece52b5 | 2886 | Common Var(flag_tree_vrp) Init(0) Optimization |
a7b2e184 | 2887 | Perform Value Range Propagation on trees. |
0bca51f0 | 2888 | |
8fe17e23 | 2889 | fsplit-paths |
eece52b5 | 2890 | Common Var(flag_split_paths) Init(0) Optimization |
8fe17e23 AA |
2891 | Split paths leading to loop backedges. |
2892 | ||
71017a7b AL |
2893 | funconstrained-commons |
2894 | Common Var(flag_unconstrained_commons) Optimization | |
2895 | Assume common declarations may be overridden with ones with a larger | |
2896 | trailing array. | |
2897 | ||
de32c0cb | 2898 | funit-at-a-time |
eece52b5 | 2899 | Common Var(flag_unit_at_a_time) Init(1) |
a7b2e184 | 2900 | Compile whole compilation unit at a time. |
de32c0cb NB |
2901 | |
2902 | funroll-loops | |
eece52b5 | 2903 | Common Var(flag_unroll_loops) Optimization |
a7b2e184 | 2904 | Perform loop unrolling when iteration count is known. |
de32c0cb NB |
2905 | |
2906 | funroll-all-loops | |
eece52b5 | 2907 | Common Var(flag_unroll_all_loops) Optimization |
a7b2e184 | 2908 | Perform loop unrolling for all loops. |
de32c0cb | 2909 | |
71489d8e | 2910 | funroll-completely-grow-size |
fe9458c2 | 2911 | Undocumented Var(flag_cunroll_grow_size) Optimization |
71489d8e | 2912 | ; Internal undocumented flag, allow size growth during complete unrolling |
2913 | ||
f9cc1a70 PB |
2914 | ; Nonzero means that loop optimizer may assume that the induction variables |
2915 | ; that control loops do not overflow and that the loops with nontrivial | |
2916 | ; exit condition are not infinite | |
2917 | funsafe-loop-optimizations | |
78f63b79 BC |
2918 | Common Ignore |
2919 | Does nothing. Preserved for backward compatibility. | |
f9cc1a70 | 2920 | |
a1a82611 | 2921 | fassociative-math |
eece52b5 | 2922 | Common Var(flag_associative_math) SetByCombined Optimization |
a1a82611 RE |
2923 | Allow optimization for floating-point arithmetic which may change the |
2924 | result of the operation due to rounding. | |
2925 | ||
2926 | freciprocal-math | |
eece52b5 | 2927 | Common Var(flag_reciprocal_math) SetByCombined Optimization |
a1a82611 RE |
2928 | Same as -fassociative-math for expressions which include division. |
2929 | ||
31b66477 KC |
2930 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2931 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2932 | ; are allowed to assume that their arguments and results are "normal" | |
2933 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2934 | funsafe-math-optimizations |
eece52b5 | 2935 | Common Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
a7b2e184 | 2936 | Allow math optimizations that may violate IEEE or ISO standards. |
6ff3a151 | 2937 | |
de32c0cb | 2938 | funswitch-loops |
eece52b5 | 2939 | Common Var(flag_unswitch_loops) Optimization |
a7b2e184 | 2940 | Perform loop unswitching. |
de32c0cb | 2941 | |
28df8730 | 2942 | fsplit-loops |
eece52b5 | 2943 | Common Var(flag_split_loops) Optimization |
28df8730 MM |
2944 | Perform loop splitting. |
2945 | ||
13e08dc9 | 2946 | fversion-loops-for-strides |
eece52b5 | 2947 | Common Var(flag_version_loops_for_strides) Optimization |
13e08dc9 RS |
2948 | Version loops based on whether indices have a stride of one. |
2949 | ||
6ff3a151 | 2950 | funwind-tables |
eece52b5 | 2951 | Common Var(flag_unwind_tables) Optimization |
a7b2e184 | 2952 | Just generate unwind tables for exception handling. |
6ff3a151 | 2953 | |
b352afba | 2954 | fuse-ld=bfd |
b78e932d | 2955 | Common Driver Negative(fuse-ld=gold) |
a7b2e184 | 2956 | Use the bfd linker instead of the default linker. |
b352afba NC |
2957 | |
2958 | fuse-ld=gold | |
b78e932d | 2959 | Common Driver Negative(fuse-ld=bfd) |
a7b2e184 | 2960 | Use the gold linker instead of the default linker. |
b352afba | 2961 | |
d69ac8b7 RG |
2962 | fuse-ld=lld |
2963 | Common Driver Negative(fuse-ld=lld) | |
2964 | Use the lld LLVM linker instead of the default linker. | |
2965 | ||
da18ea94 | 2966 | fuse-linker-plugin |
063d671d | 2967 | Common Undocumented Var(flag_use_linker_plugin) |
da18ea94 | 2968 | |
e90afde6 JM |
2969 | ; Positive if we should track variables, negative if we should run |
2970 | ; the var-tracking pass only to discard debug annotations, zero if | |
2971 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2972 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2973 | ; in process_options (). | |
014a1138 | 2974 | fvar-tracking |
eece52b5 | 2975 | Common Var(flag_var_tracking) Init(2) PerFunction |
a7b2e184 | 2976 | Perform variable tracking. |
014a1138 | 2977 | |
e90afde6 JM |
2978 | ; Positive if we should track variables at assignments, negative if |
2979 | ; we should run the var-tracking pass only to discard debug | |
2980 | ; annotations. When flag_var_tracking_assignments == | |
2981 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2982 | fvar-tracking-assignments |
eece52b5 | 2983 | Common Var(flag_var_tracking_assignments) Init(2) PerFunction |
a7b2e184 | 2984 | Perform variable tracking by annotating assignments. |
b5b8b0ac | 2985 | |
e90afde6 JM |
2986 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2987 | ; processing options and computing its default. */ | |
b5b8b0ac | 2988 | fvar-tracking-assignments-toggle |
eece52b5 | 2989 | Common Var(flag_var_tracking_assignments_toggle) PerFunction |
a7b2e184 | 2990 | Toggle -fvar-tracking-assignments. |
b5b8b0ac | 2991 | |
1267ca30 EB |
2992 | ; Positive if we should track uninitialized variables, negative if |
2993 | ; we should run the var-tracking pass only to discard debug | |
2994 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
2995 | ; will be set according to flag_var_tracking. | |
62760ffd | 2996 | fvar-tracking-uninit |
eece52b5 | 2997 | Common Var(flag_var_tracking_uninit) PerFunction |
a7b2e184 | 2998 | Perform variable tracking and also tag variables that are uninitialized. |
62760ffd | 2999 | |
26d476cd | 3000 | ; Alias to enable both -ftree-loop-vectorize and -ftree-slp-vectorize. |
79fe1b3b | 3001 | ftree-vectorize |
eece52b5 | 3002 | Common Optimization |
a7b2e184 | 3003 | Enable vectorization on trees. |
79fe1b3b | 3004 | |
78c60e3d | 3005 | ftree-vectorizer-verbose= |
477e804b SS |
3006 | Common Joined RejectNegative Ignore |
3007 | Does nothing. Preserved for backward compatibility. | |
78c60e3d | 3008 | |
ea0f3e87 | 3009 | ftree-loop-vectorize |
eece52b5 | 3010 | Common Var(flag_tree_loop_vectorize) Optimization EnabledBy(ftree-vectorize) |
a7b2e184 | 3011 | Enable loop vectorization on trees. |
ea0f3e87 | 3012 | |
a70d6342 | 3013 | ftree-slp-vectorize |
eece52b5 | 3014 | Common Var(flag_tree_slp_vectorize) Optimization EnabledBy(ftree-vectorize) |
a7b2e184 | 3015 | Enable basic block vectorization (SLP) on trees. |
a70d6342 | 3016 | |
d6d11272 | 3017 | fvect-cost-model= |
b16650ac | 3018 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) Optimization |
0b0061f4 | 3019 | -fvect-cost-model=[unlimited|dynamic|cheap|very-cheap] Specifies the cost model for vectorization. |
a7b2e184 | 3020 | |
8b5e1202 | 3021 | fsimd-cost-model= |
b16650ac | 3022 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) Optimization |
0b0061f4 | 3023 | -fsimd-cost-model=[unlimited|dynamic|cheap|very-cheap] Specifies the vectorization cost model for code marked with a simd directive. |
8b5e1202 | 3024 | |
d6d11272 XDL |
3025 | Enum |
3026 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
3027 | ||
3028 | EnumValue | |
3029 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
3030 | ||
3031 | EnumValue | |
3032 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
3033 | ||
3034 | EnumValue | |
3035 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
3036 | ||
0b0061f4 RS |
3037 | EnumValue |
3038 | Enum(vect_cost_model) String(very-cheap) Value(VECT_COST_MODEL_VERY_CHEAP) | |
3039 | ||
792ed98b | 3040 | fvect-cost-model |
205d7111 | 3041 | Common Alias(fvect-cost-model=,dynamic,unlimited) |
d6d11272 XDL |
3042 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. |
3043 | ||
c12cc930 | 3044 | ftree-vect-loop-version |
d6d11272 XDL |
3045 | Common Ignore |
3046 | Does nothing. Preserved for backward compatibility. | |
c12cc930 | 3047 | |
fbf798fc | 3048 | ftree-scev-cprop |
eece52b5 | 3049 | Common Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
3050 | Enable copy propagation of scalar-evolution information. |
3051 | ||
31b66477 KC |
3052 | ; -fverbose-asm causes extra commentary information to be produced in |
3053 | ; the generated assembly code (to make it more readable). This option | |
3054 | ; is generally only of use to those who actually need to read the | |
3055 | ; generated assembly code (perhaps while debugging the compiler itself). | |
3056 | ; -fno-verbose-asm, the default, causes the extra information | |
3057 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 3058 | fverbose-asm |
eece52b5 | 3059 | Common Var(flag_verbose_asm) |
a7b2e184 | 3060 | Add extra commentary to assembler output. |
6ff3a151 | 3061 | |
d7afec4b | 3062 | fvisibility= |
e6d4b984 | 3063 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
a7b2e184 | 3064 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility. |
d7afec4b | 3065 | |
e6d4b984 JM |
3066 | Enum |
3067 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
3068 | ||
3069 | EnumValue | |
3070 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
3071 | ||
3072 | EnumValue | |
3073 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
3074 | ||
3075 | EnumValue | |
3076 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
3077 | ||
3078 | EnumValue | |
3079 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 3080 | |
2077db1b CT |
3081 | fvtable-verify= |
3082 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
3083 | Validate vtable pointers before using them. | |
3084 | ||
3085 | Enum | |
3086 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
3087 | ||
3088 | EnumValue | |
3089 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
3090 | ||
3091 | EnumValue | |
3092 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
3093 | ||
3094 | EnumValue | |
3095 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
3096 | ||
3097 | fvtv-counts | |
3098 | Common Var(flag_vtv_counts) | |
3099 | Output vtable verification counters. | |
3100 | ||
3101 | fvtv-debug | |
3102 | Common Var(flag_vtv_debug) | |
3103 | Output vtable verification pointer sets information. | |
3104 | ||
fca9dc00 | 3105 | fvpt |
eece52b5 | 3106 | Common Var(flag_value_profile_transformations) Optimization |
a7b2e184 | 3107 | Use expression value profiles in optimizations. |
fca9dc00 | 3108 | |
62551c66 | 3109 | fweb |
eece52b5 | 3110 | Common Var(flag_web) Init(2) Optimization |
a7b2e184 | 3111 | Construct webs and split unrelated uses of single variable. |
62551c66 | 3112 | |
c2699190 | 3113 | ftree-builtin-call-dce |
eece52b5 | 3114 | Common Var(flag_tree_builtin_call_dce) Init(0) Optimization |
a7b2e184 | 3115 | Enable conditional dead code elimination for builtin calls. |
c2699190 | 3116 | |
ce91e74c | 3117 | fwhole-program |
eece52b5 | 3118 | Common Var(flag_whole_program) Init(0) |
a7b2e184 | 3119 | Perform whole program optimizations. |
ce91e74c | 3120 | |
3fccbb9e | 3121 | fwrapv-pointer |
eece52b5 | 3122 | Common Var(flag_wrapv_pointer) Optimization |
3fccbb9e JJ |
3123 | Assume pointer overflow wraps around. |
3124 | ||
6ff3a151 | 3125 | fwrapv |
eece52b5 | 3126 | Common Var(flag_wrapv) Optimization |
a7b2e184 | 3127 | Assume signed arithmetic overflow wraps around. |
6ff3a151 | 3128 | |
6ff3a151 | 3129 | fzero-initialized-in-bss |
eece52b5 | 3130 | Common Var(flag_zero_initialized_in_bss) Init(1) |
a7b2e184 | 3131 | Put zero initialized data in the bss section. |
6ff3a151 | 3132 | |
d10f3e90 | 3133 | fzero-call-used-regs= |
eece52b5 | 3134 | Common RejectNegative Joined |
d10f3e90 | 3135 | Clear call-used registers upon function return. |
3136 | ||
e01cc6dc | 3137 | g |
9ed32e27 | 3138 | Common Driver RejectNegative JoinedOrMissing |
a7b2e184 | 3139 | Generate debug information in default format. |
df38ffef | 3140 | |
924c9e3e AO |
3141 | gas-loc-support |
3142 | Common Driver Var(dwarf2out_as_loc_support) Init(2) | |
04e5c73d | 3143 | Assume assembler support for (DWARF2+) .loc directives. |
924c9e3e AO |
3144 | |
3145 | gas-locview-support | |
3146 | Common Driver Var(dwarf2out_as_locview_support) Init(2) | |
04e5c73d | 3147 | Assume assembler support for view in (DWARF2+) .loc directives. |
924c9e3e | 3148 | |
e7e95821 | 3149 | gcoff |
68a57628 | 3150 | Common Driver WarnRemoved |
e7e95821 JW |
3151 | Does nothing. Preserved for backward compatibility. |
3152 | ||
3153 | gcoff1 | |
68a57628 | 3154 | Common Driver WarnRemoved |
e7e95821 JW |
3155 | Does nothing. Preserved for backward compatibility. |
3156 | ||
3157 | gcoff2 | |
68a57628 | 3158 | Common Driver WarnRemoved |
e7e95821 JW |
3159 | Does nothing. Preserved for backward compatibility. |
3160 | ||
3161 | gcoff3 | |
68a57628 | 3162 | Common Driver WarnRemoved |
e7e95821 JW |
3163 | Does nothing. Preserved for backward compatibility. |
3164 | ||
0029b929 | 3165 | gcolumn-info |
8008dd1c | 3166 | Common Driver Var(debug_column_info,1) Init(1) |
0029b929 JJ |
3167 | Record DW_AT_decl_column and DW_AT_call_column in DWARF. |
3168 | ||
6782438d | 3169 | gdwarf |
1c70261c | 3170 | Common Driver JoinedOrMissing Negative(gdwarf-) |
a7b2e184 | 3171 | Generate debug information in default version of DWARF format. |
6782438d | 3172 | |
53b2323e | 3173 | gdwarf- |
3804e937 | 3174 | Common Driver Joined UInteger Var(dwarf_version) Init(5) Negative(gstabs) |
a7b2e184 | 3175 | Generate debug information in DWARF v2 (or later) format. |
df38ffef | 3176 | |
65312dfc JJ |
3177 | gdwarf32 |
3178 | Common Driver Var(dwarf_offset_size,4) Init(4) RejectNegative | |
3179 | Use 32-bit DWARF format when emitting DWARF debug information. | |
3180 | ||
3181 | gdwarf64 | |
3182 | Common Driver Var(dwarf_offset_size,8) RejectNegative | |
3183 | Use 64-bit DWARF format when emitting DWARF debug information. | |
3184 | ||
df38ffef | 3185 | ggdb |
1c70261c | 3186 | Common Driver JoinedOrMissing |
a7b2e184 | 3187 | Generate debug information in default extended format. |
df38ffef | 3188 | |
924c9e3e AO |
3189 | ginline-points |
3190 | Common Driver Var(debug_inline_points) Init(2) | |
04e5c73d | 3191 | Generate extended entry point information for inlined functions. |
924c9e3e AO |
3192 | |
3193 | ginternal-reset-location-views | |
3194 | Common Driver Var(debug_internal_reset_location_views) Init(2) | |
04e5c73d | 3195 | Compute locview reset points based on insn length estimates. |
924c9e3e | 3196 | |
9ed32e27 AO |
3197 | gno- |
3198 | RejectNegative Joined Undocumented | |
3199 | ; Catch the gno- prefix, so it doesn't backtrack to g<level>. | |
3200 | ||
5175cbaf | 3201 | gno-pubnames |
1c70261c | 3202 | Common Driver Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) |
5175cbaf SA |
3203 | Don't generate DWARF pubnames and pubtypes sections. |
3204 | ||
3205 | gpubnames | |
1c70261c | 3206 | Common Driver Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) |
5175cbaf SA |
3207 | Generate DWARF pubnames and pubtypes sections. |
3208 | ||
7a1dd0fa | 3209 | ggnu-pubnames |
1c70261c | 3210 | Common Driver Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) |
7a1dd0fa SA |
3211 | Generate DWARF pubnames and pubtypes sections with GNU extensions. |
3212 | ||
e967adf4 | 3213 | grecord-gcc-switches |
9ed32e27 | 3214 | Common Driver Var(dwarf_record_gcc_switches) Init(1) |
e967adf4 JJ |
3215 | Record gcc command line switches in DWARF DW_AT_producer. |
3216 | ||
99ea153e | 3217 | gsplit-dwarf |
9ed32e27 | 3218 | Common Driver Var(dwarf_split_debug_info) Init(0) |
a7b2e184 | 3219 | Generate debug information in separate .dwo files. |
99ea153e | 3220 | |
df38ffef | 3221 | gstabs |
1c70261c | 3222 | Common Driver JoinedOrMissing Negative(gstabs+) |
a7b2e184 | 3223 | Generate debug information in STABS format. |
df38ffef NB |
3224 | |
3225 | gstabs+ | |
1c70261c | 3226 | Common Driver JoinedOrMissing Negative(gvms) |
a7b2e184 | 3227 | Generate debug information in extended STABS format. |
df38ffef | 3228 | |
8697bf9f AO |
3229 | gstatement-frontiers |
3230 | Common Driver Var(debug_nonbind_markers_p) Init(2) | |
3231 | Emit progressive recommended breakpoint locations. | |
3232 | ||
65f753a0 | 3233 | gstrict-dwarf |
eece52b5 | 3234 | Common Driver Var(dwarf_strict) Init(0) |
a7b2e184 | 3235 | Don't emit DWARF additions beyond selected version. |
65f753a0 | 3236 | |
03e992ac | 3237 | gdescribe-dies |
eece52b5 | 3238 | Common Driver Var(flag_describe_dies) Init(0) |
03e992ac TV |
3239 | Add description attributes to some DWARF DIEs that have no name attribute. |
3240 | ||
2153915d | 3241 | gtoggle |
eece52b5 | 3242 | Common Driver Var(flag_gtoggle) |
a7b2e184 | 3243 | Toggle debug information generation. |
2153915d | 3244 | |
bd2b9f1e AO |
3245 | gvariable-location-views |
3246 | Common Driver Var(debug_variable_location_views, 1) Init(2) | |
3247 | Augment variable location lists with progressive views. | |
3248 | ||
3249 | gvariable-location-views=incompat5 | |
3250 | Common Driver RejectNegative Var(debug_variable_location_views, -1) Init(2) | |
3251 | ||
df38ffef | 3252 | gvms |
1c70261c | 3253 | Common Driver JoinedOrMissing Negative(gxcoff) |
a7b2e184 | 3254 | Generate debug information in VMS format. |
df38ffef NB |
3255 | |
3256 | gxcoff | |
1c70261c | 3257 | Common Driver JoinedOrMissing Negative(gxcoff+) |
a7b2e184 | 3258 | Generate debug information in XCOFF format. |
df38ffef NB |
3259 | |
3260 | gxcoff+ | |
180295ed | 3261 | Common Driver JoinedOrMissing Negative(gdwarf) |
a7b2e184 | 3262 | Generate debug information in extended XCOFF format. |
e01cc6dc | 3263 | |
29d7cbd1 RO |
3264 | Enum |
3265 | Name(compressed_debug_sections) Type(int) | |
3266 | ||
3267 | ; Since -gz= is completely handled in specs, the values aren't used and we | |
3268 | ; assign arbitrary constants. | |
3269 | EnumValue | |
3270 | Enum(compressed_debug_sections) String(none) Value(0) | |
3271 | ||
3272 | EnumValue | |
3273 | Enum(compressed_debug_sections) String(zlib) Value(1) | |
3274 | ||
3275 | EnumValue | |
3276 | Enum(compressed_debug_sections) String(zlib-gnu) Value(2) | |
3277 | ||
3278 | gz | |
3279 | Common Driver | |
a7b2e184 | 3280 | Generate compressed debug sections. |
29d7cbd1 RO |
3281 | |
3282 | gz= | |
9ed32e27 | 3283 | Common Driver RejectNegative Joined Enum(compressed_debug_sections) |
a7b2e184 | 3284 | -gz=<format> Generate compressed debug sections in format <format>. |
29d7cbd1 | 3285 | |
6d721f67 JM |
3286 | h |
3287 | Driver Joined Separate | |
3288 | ||
4adbd5dd MK |
3289 | iplugindir= |
3290 | Common Joined Var(plugindir_string) Init(0) | |
a7b2e184 | 3291 | -iplugindir=<dir> Set <dir> to be the default plugin directory. |
4adbd5dd | 3292 | |
e0cdc09f MK |
3293 | imultiarch |
3294 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
a7b2e184 | 3295 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory. |
e0cdc09f | 3296 | |
603349bf JM |
3297 | l |
3298 | Driver Joined Separate | |
3299 | ||
dd9f93dc JM |
3300 | n |
3301 | Driver | |
3302 | ||
603349bf JM |
3303 | no-canonical-prefixes |
3304 | Driver | |
3305 | ||
d9d16a19 JM |
3306 | nodefaultlibs |
3307 | Driver | |
3308 | ||
bab79a40 JM |
3309 | nostartfiles |
3310 | Driver | |
3311 | ||
f37866e8 OH |
3312 | nolibc |
3313 | Driver | |
3314 | ||
d9d16a19 JM |
3315 | nostdlib |
3316 | Driver | |
3317 | ||
d185d268 | 3318 | o |
d5478783 | 3319 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
a7b2e184 | 3320 | -o <file> Place output into <file>. |
d185d268 NB |
3321 | |
3322 | p | |
50431bc4 | 3323 | Common Var(profile_flag) |
a7b2e184 | 3324 | Enable function profiling. |
d185d268 | 3325 | |
603349bf JM |
3326 | pass-exit-codes |
3327 | Driver Var(pass_exit_codes) | |
3328 | ||
d185d268 | 3329 | pedantic |
c1771a20 | 3330 | Common Alias(Wpedantic) |
d185d268 NB |
3331 | |
3332 | pedantic-errors | |
d5478783 | 3333 | Common Var(flag_pedantic_errors) |
a7b2e184 | 3334 | Like -pedantic but issue them as errors. |
d185d268 | 3335 | |
d9d16a19 JM |
3336 | pg |
3337 | Driver | |
3338 | ||
603349bf JM |
3339 | pipe |
3340 | Driver Var(use_pipes) | |
3341 | ||
3342 | print-file-name= | |
3343 | Driver JoinedOrMissing Var(print_file_name) | |
3344 | ||
3345 | print-libgcc-file-name | |
3346 | Driver | |
3347 | ||
3348 | print-multi-directory | |
3349 | Driver Var(print_multi_directory) | |
3350 | ||
3351 | print-multi-lib | |
3352 | Driver Var(print_multi_lib) | |
3353 | ||
3354 | print-multi-os-directory | |
3355 | Driver Var(print_multi_os_directory) | |
a7b2e184 | 3356 | |
e0cdc09f MK |
3357 | print-multiarch |
3358 | Driver Var(print_multiarch) | |
603349bf JM |
3359 | |
3360 | print-prog-name= | |
3361 | Driver JoinedOrMissing Var(print_prog_name) | |
3362 | ||
3363 | print-search-dirs | |
3364 | Driver Var(print_search_dirs) | |
3365 | ||
3366 | print-sysroot | |
3367 | Driver Var(print_sysroot) | |
3368 | ||
3369 | print-sysroot-headers-suffix | |
3370 | Driver Var(print_sysroot_headers_suffix) | |
3371 | ||
d7b42618 | 3372 | quiet |
603349bf | 3373 | Common Var(quiet_flag) RejectDriver |
a7b2e184 | 3374 | Do not display functions compiled or elapsed time. |
d7b42618 | 3375 | |
dd9f93dc JM |
3376 | r |
3377 | Driver | |
3378 | ||
3379 | s | |
3380 | Driver | |
3381 | ||
603349bf JM |
3382 | save-temps |
3383 | Driver | |
3384 | ||
3385 | save-temps= | |
3386 | Driver Joined | |
3387 | ||
dd9f93dc JM |
3388 | t |
3389 | Driver | |
3390 | ||
603349bf JM |
3391 | time |
3392 | Driver Var(report_times) | |
3393 | ||
3394 | time= | |
3395 | Driver JoinedOrMissing | |
3396 | ||
e200444e JM |
3397 | u |
3398 | Driver Joined Separate | |
3399 | ||
5642f5d5 JM |
3400 | undef |
3401 | Driver | |
3402 | ; C option, but driver must not handle as "-u ndef". | |
3403 | ||
603349bf | 3404 | v |
d5478783 | 3405 | Common Driver Var(verbose_flag) |
a7b2e184 | 3406 | Enable verbose output. |
603349bf | 3407 | |
d185d268 | 3408 | version |
603349bf | 3409 | Common Var(version_flag) RejectDriver |
a7b2e184 | 3410 | Display the compiler's version. |
d185d268 NB |
3411 | |
3412 | w | |
50431bc4 | 3413 | Common Var(inhibit_warnings) |
a7b2e184 | 3414 | Suppress warnings. |
d185d268 | 3415 | |
603349bf JM |
3416 | wrapper |
3417 | Driver Separate Var(wrapper_string) | |
3418 | ||
3419 | x | |
3420 | Driver Joined Separate | |
3421 | ||
528dc603 | 3422 | shared |
b4fed890 | 3423 | Driver RejectNegative Negative(static-pie) |
a7b2e184 | 3424 | Create a shared library. |
528dc603 | 3425 | |
603349bf JM |
3426 | shared-libgcc |
3427 | Driver | |
3428 | ||
3429 | specs | |
5de8299c | 3430 | Driver Separate Alias(specs=) |
603349bf JM |
3431 | |
3432 | specs= | |
3433 | Driver Joined | |
3434 | ||
d9d16a19 JM |
3435 | static |
3436 | Driver | |
3437 | ||
603349bf JM |
3438 | static-libgcc |
3439 | Driver | |
3440 | ||
3441 | static-libgfortran | |
3442 | Driver | |
3443 | ; Documented for Fortran, but always accepted by driver. | |
3444 | ||
3445 | static-libstdc++ | |
3446 | Driver | |
3447 | ||
7a938933 ILT |
3448 | static-libgo |
3449 | Driver | |
3450 | ; Documented for Go, but always accepted by driver. | |
3451 | ||
7e8d1b2d L |
3452 | static-libasan |
3453 | Driver | |
3454 | ||
3bd87832 MM |
3455 | static-libhwasan |
3456 | Driver | |
3457 | ||
32b4b7f5 DV |
3458 | static-libtsan |
3459 | Driver | |
3460 | ||
9065ada9 JJ |
3461 | static-liblsan |
3462 | Driver | |
3463 | ||
de5a5fa1 MP |
3464 | static-libubsan |
3465 | Driver | |
3466 | ||
e200444e JM |
3467 | symbolic |
3468 | Driver | |
3469 | ||
428b3812 | 3470 | no-pie |
5460e1fc | 3471 | Driver RejectNegative Negative(shared) |
b4fed890 | 3472 | Don't create a dynamically linked position independent executable. |
428b3812 L |
3473 | |
3474 | pie | |
3475 | Driver RejectNegative Negative(no-pie) | |
b4fed890 L |
3476 | Create a dynamically linked position independent executable. |
3477 | ||
3478 | static-pie | |
3479 | Driver RejectNegative Negative(pie) | |
3480 | Create a static position independent executable. | |
528dc603 | 3481 | |
6d721f67 JM |
3482 | z |
3483 | Driver Joined Separate | |
3484 | ||
1e288103 | 3485 | fipa-ra |
eece52b5 | 3486 | Common Var(flag_ipa_ra) Optimization |
a7b2e184 | 3487 | Use caller save register across calls if possible. |
d996e61a | 3488 | |
d7b42618 | 3489 | ; This comment is to ensure we retain the blank line above. |