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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 | |
5624e564 | 3 | ; Copyright (C) 2003-2015 Free Software Foundation, Inc. |
d7b42618 NB |
4 | ; |
5 | ; This file is part of GCC. | |
6 | ; | |
7 | ; GCC is free software; you can redistribute it and/or modify it under | |
8 | ; the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 9 | ; Software Foundation; either version 3, or (at your option) any later |
d7b42618 | 10 | ; version. |
c22cacf3 | 11 | ; |
d7b42618 NB |
12 | ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | ; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | ; for more details. | |
c22cacf3 | 16 | ; |
d7b42618 | 17 | ; You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
18 | ; along with GCC; see the file COPYING3. If not see |
19 | ; <http://www.gnu.org/licenses/>. | |
d7b42618 | 20 | |
71733172 | 21 | ; See the GCC internals manual (options.texi) for a description of this file's format. |
d7b42618 NB |
22 | |
23 | ; Please try to keep this file in ASCII collating order. | |
24 | ||
e90afde6 JM |
25 | Variable |
26 | int target_flags | |
27 | ||
46625112 JM |
28 | Variable |
29 | int optimize | |
30 | ||
31 | Variable | |
32 | int optimize_size | |
33 | ||
bf7a7185 RG |
34 | Variable |
35 | int optimize_debug | |
36 | ||
0a8134ca JM |
37 | ; Not used directly to control optimizations, only to save -Ofast |
38 | ; setting for "optimize" attributes. | |
39 | Variable | |
40 | int optimize_fast | |
41 | ||
a7d0d30f JM |
42 | ; True if this is the lto front end. This is used to disable gimple |
43 | ; generation and lowering passes that are normally run on the output | |
44 | ; of a front end. These passes must be bypassed for lto since they | |
45 | ; have already been done before the gimple was written. | |
46 | Variable | |
47 | bool in_lto_p = false | |
48 | ||
a75bfaa6 JM |
49 | ; 0 means straightforward implementation of complex divide acceptable. |
50 | ; 1 means wide ranges of inputs must work for complex divide. | |
51 | ; 2 means C99-like requirements for complex multiply and divide. | |
52 | Variable | |
53 | int flag_complex_method = 1 | |
54 | ||
55 | ; Nonzero if subexpressions must be evaluated from left-to-right. | |
56 | Variable | |
57 | int flag_evaluation_order = 0 | |
58 | ||
a75bfaa6 JM |
59 | ; Language specific warning pass for unused results. |
60 | Variable | |
61 | bool flag_warn_unused_result = false | |
62 | ||
48476d13 JM |
63 | Variable |
64 | int *param_values | |
65 | ||
d5478783 JM |
66 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
67 | Variable | |
68 | int flag_generate_lto | |
69 | ||
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 | ; True to warn about any objects definitions whose size is larger |
75 | ; than N bytes. Also want about function definitions whose returned | |
76 | ; values are larger than N bytes, where N is 'larger_than_size'. | |
77 | Variable | |
78 | bool warn_larger_than | |
79 | ||
80 | Variable | |
81 | HOST_WIDE_INT larger_than_size | |
82 | ||
83 | ; True to warn about any function whose frame size is larger | |
84 | ; than N bytes. | |
85 | Variable | |
86 | bool warn_frame_larger_than | |
87 | ||
88 | Variable | |
89 | HOST_WIDE_INT frame_larger_than_size | |
90 | ||
91 | ; Nonzero means we should be saving declaration info into a .X file. | |
92 | Variable | |
93 | int flag_gen_aux_info = 0 | |
94 | ||
95 | ; Nonzero if we are compiling code for a shared library, zero for | |
96 | ; executable. | |
97 | Variable | |
98 | int flag_shlib | |
99 | ||
6a1f6c9c JM |
100 | ; These two are really VEC(char_p,heap) *. |
101 | ||
102 | Variable | |
103 | void *flag_instrument_functions_exclude_functions | |
104 | ||
105 | Variable | |
106 | void *flag_instrument_functions_exclude_files | |
107 | ||
69ccdddb JM |
108 | ; Generic structs (e.g. templates not explicitly specialized) |
109 | ; may not have a compilation unit associated with them, and so | |
110 | ; may need to be treated differently from ordinary structs. | |
111 | ; | |
112 | ; Structs only handled by reference (indirectly), will also usually | |
113 | ; not need as much debugging information. | |
114 | ||
115 | Variable | |
116 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
117 | ||
118 | Variable | |
119 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
120 | ||
0576d21f JM |
121 | ; True if we should exit after parsing options. |
122 | Variable | |
123 | bool exit_after_options | |
124 | ||
125 | ; Type(s) of debugging information we are producing (if any). See | |
126 | ; flag-types.h for the definitions of the different possible types of | |
127 | ; debugging information. | |
128 | Variable | |
129 | enum debug_info_type write_symbols = NO_DEBUG | |
130 | ||
131 | ; Level of debugging information we are producing. See flag-types.h | |
132 | ; for the definitions of the different possible levels. | |
133 | Variable | |
134 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
135 | ||
136 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
137 | ; debugging information. Currently, this only has an effect when | |
138 | ; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. | |
139 | Variable | |
140 | bool use_gnu_debug_info_extensions | |
141 | ||
299404a1 JM |
142 | ; Original value of maximum field alignment in bytes, specified via |
143 | ; -fpack-struct=<value>. | |
144 | Variable | |
145 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
146 | ||
5e471ea6 JM |
147 | ; Type of stack check. |
148 | Variable | |
149 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
150 | ||
a11e0df4 EB |
151 | ; True if stack usage information needs to be computed. |
152 | Variable | |
153 | bool flag_stack_usage_info = false | |
154 | ||
299404a1 JM |
155 | ; -dA causes debug commentary information to be produced in |
156 | ; the generated assembly code (to make it more readable). This option | |
157 | ; is generally only of use to those who actually need to read the | |
158 | ; generated assembly code (perhaps while debugging the compiler itself). | |
159 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
160 | ; to be a catchall for printing debug information in the assembler file. | |
161 | Variable | |
162 | int flag_debug_asm | |
163 | ||
164 | ; -dP causes the rtl to be emitted as a comment in assembly. | |
165 | Variable | |
166 | int flag_dump_rtl_in_asm | |
167 | ||
168 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
169 | Variable | |
170 | bool flag_dump_all_passed | |
171 | ||
172 | ; Other flags saying which kinds of debugging dump have been requested. | |
173 | ||
174 | Variable | |
175 | int rtl_dump_and_exit | |
176 | ||
177 | Variable | |
178 | int flag_print_asm_name | |
179 | ||
a803773f JM |
180 | ; Name of top-level original source file (what was input to cpp). |
181 | ; This comes from the #-command at the beginning of the actual input. | |
182 | ; If there isn't any there, then this is the cc1 input file name. | |
183 | Variable | |
184 | const char *main_input_filename | |
185 | ||
186 | ; Pointer to base name in main_input_filename, with directories and a | |
187 | ; single final extension removed, and the length of this base | |
188 | ; name. | |
189 | ||
190 | Variable | |
191 | const char *main_input_basename | |
192 | ||
193 | Variable | |
194 | int main_input_baselength | |
195 | ||
299404a1 JM |
196 | ; Which options have been printed by --help. |
197 | Variable | |
198 | char *help_printed | |
199 | ||
e6d4b984 JM |
200 | ; Which enums have been printed by --help. 0 = not printed, no |
201 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
202 | ; = printed. | |
203 | Variable | |
204 | char *help_enum_printed | |
205 | ||
299404a1 JM |
206 | ; The number of columns for --help output. |
207 | Variable | |
208 | unsigned int help_columns | |
209 | ||
210 | ; Whether this options structure has been through finish_options | |
211 | Variable | |
212 | bool flag_opts_finished | |
213 | ||
de5a5fa1 MP |
214 | ; What the sanitizer should instrument |
215 | Variable | |
216 | unsigned int flag_sanitize | |
217 | ||
d95a2703 JJ |
218 | ; What sanitizers should recover from errors |
219 | Variable | |
fed4de37 | 220 | unsigned int flag_sanitize_recover = SANITIZE_UNDEFINED | SANITIZE_NONDEFAULT | SANITIZE_KERNEL_ADDRESS |
d95a2703 | 221 | |
91035653 JJ |
222 | ; Flag whether a prefix has been added to dump_base_name |
223 | Variable | |
224 | bool dump_base_name_prefixed = false | |
225 | ||
603349bf JM |
226 | ### |
227 | Driver | |
228 | ||
e200444e JM |
229 | -assemble |
230 | Driver Alias(S) | |
231 | ||
232 | -compile | |
233 | Driver Alias(c) | |
234 | ||
235 | -coverage | |
236 | Driver Alias(coverage) | |
237 | ||
238 | -debug | |
239 | Common Alias(g) | |
240 | ||
241 | -dump | |
242 | Common Separate Alias(d) | |
243 | ||
244 | -dump= | |
245 | Common Joined Alias(d) | |
246 | ||
247 | -dumpbase | |
248 | Common Separate Alias(dumpbase) | |
249 | ||
250 | -dumpdir | |
251 | Common Separate Alias(dumpdir) | |
252 | ||
253 | -entry | |
254 | Driver Separate Alias(e) | |
255 | ||
256 | -entry= | |
257 | Driver Joined Alias(e) | |
258 | ||
259 | -extra-warnings | |
260 | Common Warning Alias(Wextra) | |
261 | ||
262 | -for-assembler | |
263 | Driver Separate Alias(Xassembler) | |
264 | ||
265 | -for-assembler= | |
266 | Driver JoinedOrMissing Alias(Xassembler) | |
267 | ||
268 | -for-linker | |
269 | Driver Separate Alias(Xlinker) | |
270 | ||
271 | -for-linker= | |
272 | Driver JoinedOrMissing Alias(Xlinker) | |
273 | ||
274 | -force-link | |
275 | Driver Separate Alias(u) | |
276 | ||
277 | -force-link= | |
278 | Driver Joined Alias(u) | |
279 | ||
d185d268 | 280 | -help |
e200444e | 281 | Common Driver Var(help_flag) |
cf03fd63 | 282 | Display this information |
d185d268 | 283 | |
c662432e | 284 | -help= |
603349bf | 285 | Common Driver Report Joined |
c662432e | 286 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params |
903caebf | 287 | |
e200444e JM |
288 | -language |
289 | Driver Separate Alias(x) | |
290 | ||
291 | -language= | |
292 | Driver Joined Alias(x) | |
293 | ||
294 | -library-directory | |
295 | Driver Separate Alias(L) | |
296 | ||
297 | -library-directory= | |
298 | Driver Joined Alias(L) | |
299 | ||
300 | -no-canonical-prefixes | |
301 | Driver Alias(no-canonical-prefixes) | |
302 | ||
303 | -no-standard-libraries | |
304 | Driver Alias(nostdlib) | |
305 | ||
28b4fc51 JM |
306 | -no-sysroot-suffix |
307 | Driver Var(no_sysroot_suffix) | |
308 | ||
e200444e JM |
309 | -no-warnings |
310 | Common Alias(w) | |
311 | ||
312 | -optimize | |
313 | Common Alias(O) | |
314 | ||
315 | -output | |
316 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
317 | ||
318 | -output= | |
319 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
320 | ||
321 | -pass-exit-codes | |
322 | Driver Alias(pass-exit-codes) | |
323 | ||
324 | -pedantic | |
c1771a20 | 325 | Common Alias(Wpedantic) |
e200444e JM |
326 | |
327 | -pedantic-errors | |
328 | Common Alias(pedantic-errors) | |
329 | ||
330 | -pie | |
5460e1fc | 331 | Driver Alias(pie) |
e200444e JM |
332 | |
333 | -pipe | |
334 | Driver Alias(pipe) | |
335 | ||
336 | -prefix | |
337 | Driver Separate Alias(B) | |
338 | ||
339 | -prefix= | |
340 | Driver JoinedOrMissing Alias(B) | |
341 | ||
342 | -preprocess | |
343 | Driver Alias(E) | |
344 | ||
345 | -print-file-name | |
346 | Driver Separate Alias(print-file-name=) | |
347 | ||
348 | -print-file-name= | |
349 | Driver JoinedOrMissing Alias(print-file-name=) | |
350 | ||
351 | -print-libgcc-file-name | |
352 | Driver Alias(print-libgcc-file-name) | |
353 | ||
354 | -print-multi-directory | |
355 | Driver Alias(print-multi-directory) | |
356 | ||
357 | -print-multi-lib | |
358 | Driver Alias(print-multi-lib) | |
359 | ||
360 | -print-multi-os-directory | |
361 | Driver Alias(print-multi-os-directory) | |
362 | ||
e0cdc09f MK |
363 | -print-multiarch |
364 | Driver Alias(print-multiarch) | |
365 | ||
e200444e JM |
366 | -print-prog-name |
367 | Driver Separate Alias(print-prog-name=) | |
368 | ||
369 | -print-prog-name= | |
370 | Driver JoinedOrMissing Alias(print-prog-name=) | |
371 | ||
372 | -print-search-dirs | |
373 | Driver Alias(print-search-dirs) | |
374 | ||
375 | -print-sysroot | |
376 | Driver Alias(print-sysroot) | |
377 | ||
378 | -print-sysroot-headers-suffix | |
379 | Driver Alias(print-sysroot-headers-suffix) | |
380 | ||
381 | -profile | |
382 | Common Alias(p) | |
383 | ||
384 | -save-temps | |
385 | Driver Alias(save-temps) | |
386 | ||
387 | -shared | |
5460e1fc | 388 | Driver Alias(shared) |
e200444e JM |
389 | |
390 | -specs | |
391 | Driver Separate Alias(specs=) | |
392 | ||
393 | -specs= | |
394 | Driver Joined Alias(specs=) | |
395 | ||
396 | -static | |
397 | Driver Alias(static) | |
398 | ||
399 | -symbolic | |
400 | Driver Alias(symbolic) | |
401 | ||
d185d268 | 402 | -target-help |
603349bf | 403 | Common Driver |
c662432e NC |
404 | Alias for --help=target |
405 | ||
e200444e JM |
406 | -time |
407 | Driver Alias(time) | |
408 | ||
409 | -verbose | |
410 | Driver Alias(v) | |
411 | ||
412 | ;; The driver used to convert options such as --help into forms such | |
413 | ;; as -fhelp; the following four entries are for compatibility with | |
414 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 415 | fhelp |
e200444e | 416 | Common Driver Alias(-help) |
c662432e NC |
417 | |
418 | fhelp= | |
e200444e | 419 | Common Driver Joined Alias(-help=) |
c662432e NC |
420 | |
421 | ftarget-help | |
e200444e | 422 | Common Driver Alias(-target-help) |
c662432e | 423 | |
41fd0f9b | 424 | fversion |
e200444e | 425 | Common Driver Alias(-version) |
41fd0f9b | 426 | |
c662432e NC |
427 | -param |
428 | Common Separate | |
429 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 | 430 | |
e200444e JM |
431 | -param= |
432 | Common Joined Alias(-param) | |
433 | ||
434 | -sysroot | |
435 | Driver Separate Alias(-sysroot=) | |
436 | ||
603349bf JM |
437 | -sysroot= |
438 | Driver JoinedOrMissing | |
439 | ||
d185d268 | 440 | -version |
603349bf JM |
441 | Common Driver |
442 | ||
443 | B | |
444 | Driver Joined Separate | |
445 | ||
446 | E | |
447 | Driver | |
d185d268 | 448 | |
d9d16a19 JM |
449 | L |
450 | Driver Joined Separate | |
451 | ||
dd9f93dc JM |
452 | N |
453 | Driver | |
454 | ||
903caebf | 455 | O |
ab442df7 | 456 | Common JoinedOrMissing Optimization |
cf03fd63 | 457 | -O<number> Set optimization level to <number> |
903caebf NB |
458 | |
459 | Os | |
ab442df7 | 460 | Common Optimization |
cf03fd63 | 461 | Optimize for space rather than speed |
903caebf | 462 | |
be6d3f0e RG |
463 | Ofast |
464 | Common Optimization | |
465 | Optimize for speed disregarding exact standards compliance | |
466 | ||
bf7a7185 RG |
467 | Og |
468 | Common Optimization | |
469 | Optimize for debugging experience rather than speed or size | |
470 | ||
dd9f93dc JM |
471 | Q |
472 | Driver | |
473 | ||
474 | Qn | |
475 | Driver Negative(Qy) | |
476 | ||
477 | Qy | |
478 | Driver Negative(Qn) | |
479 | ||
6d721f67 JM |
480 | R |
481 | Driver Joined Separate | |
482 | ||
603349bf JM |
483 | S |
484 | Driver | |
485 | ||
6d721f67 JM |
486 | T |
487 | Driver Joined Separate | |
488 | ||
489 | Tbss | |
490 | Driver Separate | |
491 | ||
e69d7376 JM |
492 | Tbss= |
493 | Driver Joined | |
494 | ||
6d721f67 JM |
495 | Tdata |
496 | Driver Separate | |
497 | ||
e69d7376 JM |
498 | Tdata= |
499 | Driver Joined | |
500 | ||
6d721f67 JM |
501 | Ttext |
502 | Driver Separate | |
503 | ||
e69d7376 JM |
504 | Ttext= |
505 | Driver Joined | |
506 | ||
903caebf | 507 | W |
5de8299c | 508 | Common RejectNegative Warning Alias(Wextra) |
28786366 | 509 | This switch is deprecated; use -Wextra instead |
903caebf | 510 | |
603349bf JM |
511 | Wa, |
512 | Driver JoinedOrMissing | |
513 | ||
514 | Wl, | |
515 | Driver JoinedOrMissing | |
516 | ||
517 | Wp, | |
518 | Driver JoinedOrMissing | |
519 | ||
e01cc6dc | 520 | Waggregate-return |
c662432e | 521 | Common Var(warn_aggregate_return) Warning |
28786366 | 522 | Warn about returning structures, unions or arrays |
e01cc6dc | 523 | |
fbd28bc3 JJ |
524 | Waggressive-loop-optimizations |
525 | Common Var(warn_aggressive_loop_optimizations) Init(1) Warning | |
526 | Warn if a loop with constant number of iterations triggers undefined behavior | |
527 | ||
590b1f2d | 528 | Warray-bounds |
21af5cdf | 529 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
530 | Warn if an array is accessed out of bounds |
531 | ||
5c498b10 | 532 | Wattributes |
c662432e | 533 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
534 | Warn about inappropriate attribute usage |
535 | ||
e01cc6dc | 536 | Wcast-align |
c662432e | 537 | Common Var(warn_cast_align) Warning |
28786366 | 538 | Warn about pointer casts which increase alignment |
e01cc6dc | 539 | |
87cf0651 SB |
540 | Wcpp |
541 | Common Var(warn_cpp) Init(1) Warning | |
542 | Warn when a #warning directive is encountered | |
543 | ||
e01cc6dc | 544 | Wdeprecated-declarations |
c662432e | 545 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 546 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
547 | |
548 | Wdisabled-optimization | |
c662432e | 549 | Common Var(warn_disabled_optimization) Warning |
28786366 | 550 | Warn when an optimization pass is disabled |
e01cc6dc NB |
551 | |
552 | Werror | |
50431bc4 | 553 | Common Var(warnings_are_errors) |
28786366 | 554 | Treat all warnings as errors |
e01cc6dc | 555 | |
79cf5994 DD |
556 | Werror= |
557 | Common Joined | |
558 | Treat specified warning as error | |
559 | ||
903caebf | 560 | Wextra |
62a67c94 | 561 | Common Var(extra_warnings) Warning |
cf03fd63 | 562 | Print extra (possibly unwanted) warnings |
903caebf | 563 | |
c65a01af | 564 | Wfatal-errors |
50431bc4 | 565 | Common Var(flag_fatal_errors) |
c65a01af RG |
566 | Exit on the first error occurred |
567 | ||
a214518f SP |
568 | Wframe-larger-than= |
569 | Common RejectNegative Joined UInteger | |
f94e1d66 | 570 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 571 | |
a3a704a4 MH |
572 | Wfree-nonheap-object |
573 | Common Var(warn_free_nonheap_object) Init(1) Warning | |
574 | Warn when attempting to free a non-heap object | |
575 | ||
e01cc6dc | 576 | Winline |
c662432e | 577 | Common Var(warn_inline) Warning |
28786366 | 578 | Warn when an inlined function cannot be inlined |
e01cc6dc | 579 | |
86951993 AM |
580 | Winvalid-memory-model |
581 | Common Var(warn_invalid_memory_model) Init(1) Warning | |
582 | Warn when an atomic memory model parameter is known to be outside the valid range. | |
583 | ||
e01cc6dc | 584 | Wlarger-than- |
5de8299c | 585 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
586 | |
587 | Wlarger-than= | |
588 | Common RejectNegative Joined UInteger Warning | |
589 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 590 | |
f9cc1a70 | 591 | Wunsafe-loop-optimizations |
c662432e | 592 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
593 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
594 | ||
e01cc6dc | 595 | Wmissing-noreturn |
94ee6979 | 596 | Common Alias(Wsuggest-attribute=noreturn) |
e01cc6dc | 597 | |
c59f7203 | 598 | Wodr |
a0fd3373 | 599 | Common Var(warn_odr_violations) Init(1) Warning |
c59f7203 JH |
600 | Warn about some C++ One Definition Rule violations during link time optimization |
601 | ||
71834ad3 | 602 | Woverflow |
c662432e | 603 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
604 | Warn about overflow in arithmetic expressions |
605 | ||
e01cc6dc | 606 | Wpacked |
c662432e | 607 | Common Var(warn_packed) Warning |
28786366 | 608 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
609 | |
610 | Wpadded | |
c662432e | 611 | Common Var(warn_padded) Warning |
28786366 | 612 | Warn when padding is required to align structure members |
e01cc6dc | 613 | |
c1771a20 | 614 | Wpedantic |
2b71f4a4 | 615 | Common Var(pedantic) Init(0) Warning |
c1771a20 MLI |
616 | Issue warnings needed for strict compliance to the standard |
617 | ||
b4dfdc11 MG |
618 | Wreturn-local-addr |
619 | Common Var(warn_return_local_addr) Init(1) Warning | |
620 | Warn about returning a pointer/reference to a local or temporary variable. | |
621 | ||
e01cc6dc | 622 | Wshadow |
c662432e | 623 | Common Var(warn_shadow) Warning |
28786366 | 624 | Warn when one local variable shadows another |
e01cc6dc | 625 | |
7d69de61 | 626 | Wstack-protector |
c662432e | 627 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
628 | Warn when not issuing stack smashing protection for some reason |
629 | ||
a11e0df4 EB |
630 | Wstack-usage= |
631 | Common Joined RejectNegative UInteger Var(warn_stack_usage) Init(-1) Warning | |
632 | Warn if stack usage might be larger than specified amount | |
633 | ||
e01cc6dc | 634 | Wstrict-aliasing |
c662432e | 635 | Common Warning |
28786366 | 636 | Warn about code which might break strict aliasing rules |
e01cc6dc | 637 | |
5399d643 | 638 | Wstrict-aliasing= |
65d4f2cd | 639 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Warning |
5399d643 JW |
640 | Warn about code which might break strict aliasing rules |
641 | ||
6ac01510 | 642 | Wstrict-overflow |
21af5cdf | 643 | Common Warning |
6ac01510 ILT |
644 | Warn about optimizations that assume that signed overflow is undefined |
645 | ||
646 | Wstrict-overflow= | |
65d4f2cd | 647 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Warning |
6ac01510 ILT |
648 | Warn about optimizations that assume that signed overflow is undefined |
649 | ||
5dc16b19 MLI |
650 | Wsuggest-attribute=const |
651 | Common Var(warn_suggest_attribute_const) Warning | |
652 | Warn about functions which might be candidates for __attribute__((const)) | |
653 | ||
654 | Wsuggest-attribute=pure | |
655 | Common Var(warn_suggest_attribute_pure) Warning | |
656 | Warn about functions which might be candidates for __attribute__((pure)) | |
657 | ||
7ea6b6cf JH |
658 | Wsuggest-attribute=noreturn |
659 | Common Var(warn_suggest_attribute_noreturn) Warning | |
660 | Warn about functions which might be candidates for __attribute__((noreturn)) | |
661 | ||
91bc34a9 JH |
662 | Wsuggest-final-types |
663 | Common Var(warn_suggest_final_types) Warning | |
664 | Warn about C++ polymorphic types where adding final keyword would improve code quality | |
665 | ||
666 | Wsuggest-final-methods | |
667 | Common Var(warn_suggest_final_methods) Warning | |
668 | Warn about C++ virtual methods where adding final keyword would improve code quality | |
669 | ||
e01cc6dc | 670 | Wsystem-headers |
c662432e | 671 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 672 | Do not suppress warnings from system headers |
e01cc6dc | 673 | |
8ffadef9 MG |
674 | Wtrampolines |
675 | Common Var(warn_trampolines) Warning | |
676 | Warn whenever a trampoline is generated | |
677 | ||
faebccf9 | 678 | Wtype-limits |
95744782 | 679 | Common Var(warn_type_limits) Warning EnabledBy(Wextra) |
faebccf9 DN |
680 | Warn if a comparison is always true or always false due to the limited range of the data type |
681 | ||
e01cc6dc | 682 | Wuninitialized |
7d5a5747 | 683 | Common Var(warn_uninitialized) Warning EnabledBy(Wextra) |
28786366 | 684 | Warn about uninitialized automatic variables |
e01cc6dc | 685 | |
2f964ad6 | 686 | Wmaybe-uninitialized |
7d5a5747 | 687 | Common Var(warn_maybe_uninitialized) Warning EnabledBy(Wuninitialized) |
2f964ad6 XDL |
688 | Warn about maybe uninitialized automatic variables |
689 | ||
e01cc6dc | 690 | Wunreachable-code |
2d2bd949 | 691 | Common Ignore |
bc3c12a2 | 692 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 693 | |
903caebf | 694 | Wunused |
e73f7547 | 695 | Common Var(warn_unused) Init(0) Warning |
cf03fd63 | 696 | Enable all -Wunused- warnings |
903caebf | 697 | |
ebfbbdc5 | 698 | Wunused-but-set-parameter |
d919140b | 699 | Common Var(warn_unused_but_set_parameter) Warning EnabledBy(Wunused && Wextra) |
ebfbbdc5 JJ |
700 | Warn when a function parameter is only set, otherwise unused |
701 | ||
702 | Wunused-but-set-variable | |
7d5a5747 | 703 | Common Var(warn_unused_but_set_variable) Warning EnabledBy(Wunused) |
ebfbbdc5 JJ |
704 | Warn when a variable is only set, otherwise unused |
705 | ||
e01cc6dc | 706 | Wunused-function |
7d5a5747 | 707 | Common Var(warn_unused_function) Warning EnabledBy(Wunused) |
28786366 | 708 | Warn when a function is unused |
e01cc6dc NB |
709 | |
710 | Wunused-label | |
7d5a5747 | 711 | Common Var(warn_unused_label) Warning EnabledBy(Wunused) |
28786366 | 712 | Warn when a label is unused |
e01cc6dc NB |
713 | |
714 | Wunused-parameter | |
d919140b | 715 | Common Var(warn_unused_parameter) Warning EnabledBy(Wunused && Wextra) |
28786366 | 716 | Warn when a function parameter is unused |
e01cc6dc NB |
717 | |
718 | Wunused-value | |
7d5a5747 | 719 | Common Var(warn_unused_value) Warning EnabledBy(Wunused) |
28786366 | 720 | Warn when an expression value is unused |
e01cc6dc NB |
721 | |
722 | Wunused-variable | |
7d5a5747 | 723 | Common Var(warn_unused_variable) Warning EnabledBy(Wunused) |
28786366 | 724 | Warn when a variable is unused |
e01cc6dc | 725 | |
16c1c158 | 726 | Wcoverage-mismatch |
650cfcab NV |
727 | Common Var(warn_coverage_mismatch) Init(1) Warning |
728 | Warn in case profiles in -fprofile-use do not match | |
16c1c158 | 729 | |
cdbb5ba3 AS |
730 | Wvector-operation-performance |
731 | Common Var(warn_vector_operation_performance) Warning | |
732 | Warn when a vector operation is compiled outside the SIMD | |
733 | ||
603349bf JM |
734 | Xassembler |
735 | Driver Separate | |
736 | ||
737 | Xlinker | |
738 | Driver Separate | |
739 | ||
740 | Xpreprocessor | |
741 | Driver Separate | |
742 | ||
dd9f93dc JM |
743 | Z |
744 | Driver | |
745 | ||
d185d268 | 746 | aux-info |
d5478783 | 747 | Common Separate Var(aux_info_file_name) |
cf03fd63 | 748 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
749 | |
750 | aux-info= | |
5de8299c | 751 | Common Joined Alias(aux-info) |
d185d268 NB |
752 | |
753 | auxbase | |
d5478783 | 754 | Common Separate RejectDriver Var(aux_base_name) |
d185d268 NB |
755 | |
756 | auxbase-strip | |
603349bf JM |
757 | Common Separate RejectDriver |
758 | ||
e200444e JM |
759 | coverage |
760 | Driver | |
761 | ||
603349bf JM |
762 | c |
763 | Driver | |
d185d268 NB |
764 | |
765 | d | |
766 | Common Joined | |
cf03fd63 | 767 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
768 | |
769 | dumpbase | |
d5478783 | 770 | Common Separate Var(dump_base_name) |
cf03fd63 | 771 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 772 | |
d7fb0a6d | 773 | dumpdir |
d5478783 | 774 | Common Separate Var(dump_dir_name) |
316fc112 | 775 | -dumpdir <dir> Set the directory name to be used for dumps |
d7fb0a6d | 776 | |
603349bf JM |
777 | dumpmachine |
778 | Driver | |
779 | ||
780 | dumpspecs | |
781 | Driver | |
782 | ||
783 | dumpversion | |
784 | Driver | |
785 | ||
e200444e JM |
786 | e |
787 | Driver Joined Separate | |
788 | ||
fa381cb2 JM |
789 | ; This option has historically been passed down to the linker by an |
790 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
791 | ; as a single option. The supported option for this purpose is | |
792 | ; -rdynamic. See PR 47390. | |
793 | export-dynamic | |
794 | Driver Undocumented | |
795 | ||
31b66477 KC |
796 | ; The version of the C++ ABI in use. The following values are allowed: |
797 | ; | |
798 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
799 | ; specification. This ABI may change as bugs are discovered and fixed. | |
800 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
801 | ; versions of G++. | |
802 | ; | |
90d84934 | 803 | ; 1: The version of the ABI first used in G++ 3.2. No longer selectable. |
31b66477 | 804 | ; |
abfe01ce JM |
805 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
806 | ; | |
807 | ; 3: The version of the ABI that fixes the missing underscore | |
808 | ; in template non-type arguments of pointer type. | |
809 | ; | |
810 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
55af847f | 811 | ; vector types. First selectable in G++ 4.5. |
99a8d35b | 812 | ; |
67e18edb | 813 | ; 5: The version of the ABI that ignores attribute const/noreturn |
55af847f | 814 | ; in function pointer mangling, and corrects mangling of decltype and |
67e18edb | 815 | ; function parameters used in other parameters and the return type. |
55af847f | 816 | ; First selectable in G++ 4.6. |
67e18edb | 817 | ; |
4b6aaa99 JM |
818 | ; 6: The version of the ABI that doesn't promote scoped enums to int and |
819 | ; changes the mangling of template argument packs, const/static_cast, | |
820 | ; prefix ++ and --, and a class scope function used as a template | |
821 | ; argument. | |
967444bb JM |
822 | ; First selectable in G++ 4.7. |
823 | ; | |
622aac0b JM |
824 | ; 7: The version of the ABI that treats nullptr_t as a builtin type and |
825 | ; corrects the mangling of lambdas in default argument scope. | |
a3ddb738 | 826 | ; First selectable in G++ 4.8. |
0861bec8 JM |
827 | ; |
828 | ; 8: The version of the ABI that corrects the substitution behavior of | |
829 | ; function types with function-cv-qualifiers. | |
830 | ; First selectable in G++ 4.9. | |
831 | ; | |
31b66477 KC |
832 | ; Additional positive integers will be assigned as new versions of |
833 | ; the ABI become the default version of the ABI. | |
57782ad8 | 834 | fabi-version= |
ca0e51a0 JM |
835 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(0) |
836 | The version of the C++ ABI in use | |
57782ad8 | 837 | |
6e616110 RB |
838 | faggressive-loop-optimizations |
839 | Common Report Var(flag_aggressive_loop_optimizations) Optimization Init(1) | |
840 | Aggressively optimize loops using language constraints | |
841 | ||
6ff3a151 | 842 | falign-functions |
ab442df7 | 843 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 844 | Align the start of functions |
6ff3a151 | 845 | |
058de654 | 846 | falign-functions= |
d5478783 | 847 | Common RejectNegative Joined UInteger Var(align_functions) |
058de654 | 848 | |
6ff3a151 | 849 | falign-jumps |
ab442df7 | 850 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 851 | Align labels which are only reached by jumping |
6ff3a151 | 852 | |
058de654 | 853 | falign-jumps= |
d5478783 | 854 | Common RejectNegative Joined UInteger Var(align_jumps) |
058de654 | 855 | |
6ff3a151 | 856 | falign-labels |
ab442df7 | 857 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 858 | Align all labels |
6ff3a151 | 859 | |
058de654 | 860 | falign-labels= |
d5478783 | 861 | Common RejectNegative Joined UInteger Var(align_labels) |
058de654 | 862 | |
6ff3a151 | 863 | falign-loops |
3020190e | 864 | Common Report Var(align_loops,0) Optimization UInteger |
f3fdaec4 | 865 | Align the start of loops |
6ff3a151 | 866 | |
058de654 | 867 | falign-loops= |
d5478783 | 868 | Common RejectNegative Joined UInteger Var(align_loops) |
058de654 | 869 | |
6ff3a151 | 870 | fargument-alias |
2d2bd949 | 871 | Common Ignore |
0d3c82d6 | 872 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
873 | |
874 | fargument-noalias | |
2d2bd949 | 875 | Common Ignore |
0d3c82d6 | 876 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
877 | |
878 | fargument-noalias-global | |
2d2bd949 | 879 | Common Ignore |
0d3c82d6 | 880 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 881 | |
0698a1d2 | 882 | fargument-noalias-anything |
2d2bd949 | 883 | Common Ignore |
0d3c82d6 | 884 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 885 | |
de5a5fa1 MP |
886 | fsanitize= |
887 | Common Driver Report Joined | |
888 | Select what to sanitize | |
32b4b7f5 | 889 | |
fd960af2 YG |
890 | fasan-shadow-offset= |
891 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
892 | -fasan-shadow-offset=<number> Use custom shadow memory offset. | |
893 | ||
d95a2703 JJ |
894 | fsanitize-recover= |
895 | Common Report Joined | |
1c33c9b7 JJ |
896 | After diagnosing undefined behavior attempt to continue execution |
897 | ||
d95a2703 JJ |
898 | fsanitize-recover |
899 | Common Report | |
900 | This switch is deprecated; use -fsanitize-recover= instead | |
901 | ||
1c33c9b7 JJ |
902 | fsanitize-undefined-trap-on-error |
903 | Common Report Var(flag_sanitize_undefined_trap_on_error) Init(0) | |
904 | Use trap instead of a library function for undefined behavior sanitization | |
905 | ||
6ff3a151 | 906 | fasynchronous-unwind-tables |
c662432e | 907 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 908 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 909 | |
6fb5fa3c DB |
910 | fauto-inc-dec |
911 | Common Report Var(flag_auto_inc_dec) Init(1) | |
912 | Generate auto-inc/dec instructions | |
913 | ||
be3c16c4 DC |
914 | fauto-profile |
915 | Common Report Var(flag_auto_profile) Optimization | |
916 | Use sample profile information for call graph node weights. The default | |
917 | profile file is fbdata.afdo in 'pwd'. | |
918 | ||
919 | fauto-profile= | |
920 | Common Joined RejectNegative Var(auto_profile_file) | |
921 | Use sample profile information for call graph node weights. The profile | |
922 | file is specified in the argument. | |
923 | ||
31b66477 KC |
924 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
925 | ; For C, C++ and ObjC: defaults off. | |
926 | ; For Java: defaults to on. | |
927 | ; For Fortran: defaults to off. | |
6ff3a151 | 928 | fbounds-check |
50431bc4 | 929 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 930 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
931 | |
932 | fbranch-count-reg | |
14379e66 | 933 | Common Report Var(flag_branch_on_count_reg) Optimization |
f3fdaec4 | 934 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
935 | |
936 | fbranch-probabilities | |
c662432e | 937 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 938 | Use profiling information for branch probabilities |
6ff3a151 | 939 | |
de32c0cb | 940 | fbranch-target-load-optimize |
c662432e | 941 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 942 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
943 | |
944 | fbranch-target-load-optimize2 | |
c662432e | 945 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 946 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 947 | |
1194fc79 | 948 | fbtr-bb-exclusive |
c662432e | 949 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
950 | Restrict target load migration not to re-use registers in any basic block |
951 | ||
058de654 | 952 | fcall-saved- |
21bf1558 | 953 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 954 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
955 | |
956 | fcall-used- | |
21bf1558 | 957 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 958 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 959 | |
31b66477 KC |
960 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
961 | ; be saved across function calls, if that produces overall better code. | |
962 | ; Optional now, so people can test it. | |
de32c0cb | 963 | fcaller-saves |
c662432e | 964 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 965 | Save registers around function calls |
de32c0cb | 966 | |
3d8864c0 SP |
967 | fcheck-data-deps |
968 | Common Report Var(flag_check_data_deps) | |
969 | Compare the results of several data dependence analyzers. | |
970 | ||
2284b034 MG |
971 | fcheck-new |
972 | Common Var(flag_check_new) | |
973 | Check the return value of new in C++ | |
974 | ||
ccaeeafe NC |
975 | fcombine-stack-adjustments |
976 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
977 | Looks for opportunities to reduce stack adjustments and stack references. | |
978 | ||
6ff3a151 | 979 | fcommon |
c662432e | 980 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 981 | Do not put uninitialized globals in the common section |
6ff3a151 | 982 | |
603349bf JM |
983 | fcompare-debug |
984 | Driver | |
985 | ; Converted by the driver to -fcompare-debug= options. | |
986 | ||
2153915d | 987 | fcompare-debug= |
603349bf | 988 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
f94e1d66 | 989 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
990 | |
991 | fcompare-debug-second | |
5e471ea6 | 992 | Common Driver RejectNegative Var(flag_compare_debug) |
2153915d AO |
993 | Run only the second compilation of -fcompare-debug |
994 | ||
e692f276 RH |
995 | fcompare-elim |
996 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
997 | Perform comparison elimination after register allocation has finished | |
998 | ||
b5b8b0ac AO |
999 | fconserve-stack |
1000 | Common Var(flag_conserve_stack) Optimization | |
1001 | Do not perform optimizations increasing noticeably stack usage | |
1002 | ||
6ff3a151 | 1003 | fcprop-registers |
c662432e | 1004 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 1005 | Perform a register copy-propagation optimization pass |
6ff3a151 | 1006 | |
de32c0cb | 1007 | fcrossjumping |
c662432e | 1008 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 1009 | Perform cross-jumping optimization |
de32c0cb NB |
1010 | |
1011 | fcse-follow-jumps | |
c662432e | 1012 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 1013 | When running CSE, follow jumps to their targets |
de32c0cb NB |
1014 | |
1015 | fcse-skip-blocks | |
2d2bd949 | 1016 | Common Ignore |
5f39ad47 | 1017 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1018 | |
c7463669 | 1019 | fcx-limited-range |
5e46b0c6 | 1020 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
c7463669 RH |
1021 | Omit range reduction step when performing complex division |
1022 | ||
35085f76 JB |
1023 | fcx-fortran-rules |
1024 | Common Report Var(flag_cx_fortran_rules) Optimization | |
1025 | Complex multiplication and division follow Fortran rules | |
1026 | ||
6ff3a151 | 1027 | fdata-sections |
c662432e | 1028 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 1029 | Place data items into their own section |
6ff3a151 | 1030 | |
0a090f42 | 1031 | fdbg-cnt-list |
299404a1 | 1032 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
1033 | List all available debugging counters with their limits and counts. |
1034 | ||
6fb5fa3c | 1035 | fdbg-cnt= |
299404a1 | 1036 | Common RejectNegative Joined Var(common_deferred_options) Defer |
f94e1d66 | 1037 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 1038 | |
c8aea42c | 1039 | fdebug-prefix-map= |
299404a1 | 1040 | Common Joined RejectNegative Var(common_deferred_options) Defer |
c8aea42c PB |
1041 | Map one directory name to another in debug information |
1042 | ||
76f9db36 | 1043 | fdebug-types-section |
98095aa3 | 1044 | Common Report Var(flag_debug_types_section) Init(0) |
76f9db36 JJ |
1045 | Output .debug_types section when using DWARF v4 debuginfo. |
1046 | ||
31b66477 KC |
1047 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
1048 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 1049 | fdefer-pop |
c662432e | 1050 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 1051 | Defer popping functions args from stack until later |
de32c0cb NB |
1052 | |
1053 | fdelayed-branch | |
c662432e | 1054 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 1055 | Attempt to fill delay slots of branch instructions |
de32c0cb | 1056 | |
2da02156 EB |
1057 | fdelete-dead-exceptions |
1058 | Common Report Var(flag_delete_dead_exceptions) Init(0) | |
1059 | Delete dead instructions that may throw exceptions | |
1060 | ||
de32c0cb | 1061 | fdelete-null-pointer-checks |
1ad2f450 | 1062 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 1063 | Delete useless null pointer checks |
de32c0cb | 1064 | |
1e29e4d3 JH |
1065 | fdevirtualize-at-ltrans |
1066 | Common Report Var(flag_ltrans_devirtualize) | |
d6ae9a6d | 1067 | Stream extra data to support more aggressive devirtualization in LTO local transformation mode |
1e29e4d3 | 1068 | |
bbc9396b JH |
1069 | fdevirtualize-speculatively |
1070 | Common Report Var(flag_devirtualize_speculatively) Optimization | |
1071 | Perform speculative devirtualization | |
1072 | ||
ca1eedf6 JH |
1073 | fdevirtualize |
1074 | Common Report Var(flag_devirtualize) Optimization | |
1075 | Try to convert virtual calls to direct ones. | |
1076 | ||
de32c0cb | 1077 | fdiagnostics-show-location= |
e6d4b984 | 1078 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
cf03fd63 | 1079 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 1080 | |
e6d4b984 JM |
1081 | ; Required for these enum values. |
1082 | SourceInclude | |
1083 | pretty-print.h | |
1084 | ||
1085 | Enum | |
1086 | Name(diagnostic_prefixing_rule) Type(int) | |
1087 | ||
1088 | EnumValue | |
1089 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
1090 | ||
1091 | EnumValue | |
1092 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
1093 | ||
9fec0042 MLI |
1094 | fdiagnostics-show-caret |
1095 | Common Var(flag_diagnostics_show_caret) Init(1) | |
1096 | Show the source line with a caret indicating the column | |
1097 | ||
4b84d650 JJ |
1098 | fdiagnostics-color |
1099 | Common Alias(fdiagnostics-color=,always,never) | |
1100 | ; | |
1101 | ||
1102 | fdiagnostics-color= | |
97aa8bb6 | 1103 | Driver Common Joined RejectNegative Var(flag_diagnostics_show_color) Enum(diagnostic_color_rule) Init(DIAGNOSTICS_COLOR_NO) |
4b84d650 JJ |
1104 | -fdiagnostics-color=[never|always|auto] Colorize diagnostics |
1105 | ||
1106 | ; Required for these enum values. | |
1107 | SourceInclude | |
1108 | diagnostic-color.h | |
1109 | ||
1110 | Enum | |
1111 | Name(diagnostic_color_rule) Type(int) | |
1112 | ||
1113 | EnumValue | |
1114 | Enum(diagnostic_color_rule) String(never) Value(DIAGNOSTICS_COLOR_NO) | |
1115 | ||
1116 | EnumValue | |
1117 | Enum(diagnostic_color_rule) String(always) Value(DIAGNOSTICS_COLOR_YES) | |
1118 | ||
1119 | EnumValue | |
1120 | Enum(diagnostic_color_rule) String(auto) Value(DIAGNOSTICS_COLOR_AUTO) | |
1121 | ||
ccf08a6e | 1122 | fdiagnostics-show-option |
c7d0de89 | 1123 | Common Var(flag_diagnostics_show_option) Init(1) |
c85ce869 | 1124 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 1125 | |
226c52aa XDL |
1126 | fdisable- |
1127 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1128 | -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 disables an optimization pass | |
1129 | ||
1130 | fenable- | |
1131 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1132 | -fenable-[tree|rtl|ipa]-<pass>=range1+range2 enables an optimization pass | |
1133 | ||
6de9cd9a | 1134 | fdump- |
21bf1558 | 1135 | Common Joined RejectNegative Var(common_deferred_options) Defer |
6de9cd9a DN |
1136 | -fdump-<type> Dump various compiler internals to a file |
1137 | ||
d1583032 JM |
1138 | fdump-final-insns |
1139 | Driver RejectNegative | |
1140 | ||
2153915d AO |
1141 | fdump-final-insns= |
1142 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
1143 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
1144 | ||
c6a13190 ILT |
1145 | fdump-go-spec= |
1146 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
1147 | -fdump-go-spec=filename Write all declarations to file as Go code | |
1148 | ||
24a7799e R |
1149 | fdump-noaddr |
1150 | Common Report Var(flag_dump_noaddr) | |
1151 | Suppress output of addresses in debugging dumps | |
1152 | ||
dc10fd96 JJ |
1153 | freport-bug |
1154 | Common Driver Var(flag_report_bug) | |
1155 | Collect and dump debug information into temporary file if ICE in C/C++ | |
1156 | compiler occured. | |
1157 | ||
deced1e2 XDL |
1158 | fdump-passes |
1159 | Common Var(flag_dump_passes) Init(0) | |
1160 | Dump optimization passes | |
1161 | ||
6ff3a151 | 1162 | fdump-unnumbered |
e90afde6 | 1163 | Common Report Var(flag_dump_unnumbered) |
24a7799e | 1164 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 1165 | |
2aa7c49b | 1166 | fdump-unnumbered-links |
e90afde6 | 1167 | Common Report Var(flag_dump_unnumbered_links) |
2aa7c49b AO |
1168 | Suppress output of previous and next insn numbers in debugging dumps |
1169 | ||
b5b8b0ac AO |
1170 | fdwarf2-cfi-asm |
1171 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
1172 | Enable CFI tables via GAS assembler directives. | |
1173 | ||
355866de | 1174 | fearly-inlining |
c662432e | 1175 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
1176 | Perform early inlining |
1177 | ||
de32c0cb | 1178 | feliminate-dwarf2-dups |
50431bc4 | 1179 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 1180 | Perform DWARF2 duplicate elimination |
de32c0cb | 1181 | |
07ffa034 MJ |
1182 | fipa-sra |
1183 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
1184 | Perform interprocedural reduction of aggregates | |
1185 | ||
6a08f7b3 | 1186 | feliminate-unused-debug-symbols |
50431bc4 | 1187 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 1188 | Perform unused type elimination in debug info |
6a08f7b3 | 1189 | |
de32c0cb | 1190 | feliminate-unused-debug-types |
50431bc4 | 1191 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 1192 | Perform unused type elimination in debug info |
de32c0cb | 1193 | |
e713adf6 | 1194 | femit-class-debug-always |
eae8e474 | 1195 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1196 | Do not suppress C++ class debug information. |
1197 | ||
6ff3a151 | 1198 | fexceptions |
c662432e | 1199 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 1200 | Enable exception handling |
6ff3a151 | 1201 | |
de32c0cb | 1202 | fexpensive-optimizations |
c662432e | 1203 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 1204 | Perform a number of minor, expensive optimizations |
de32c0cb | 1205 | |
8ce94e44 | 1206 | fexcess-precision= |
e6d4b984 | 1207 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) |
8ce94e44 JM |
1208 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision |
1209 | ||
e6d4b984 JM |
1210 | Enum |
1211 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1212 | ||
1213 | EnumValue | |
1214 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1215 | ||
1216 | EnumValue | |
1217 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1218 | ||
058de654 NB |
1219 | ffast-math |
1220 | Common | |
1221 | ||
cc8547a7 | 1222 | ffat-lto-objects |
e9f67e62 | 1223 | Common Var(flag_fat_lto_objects) |
cc8547a7 AK |
1224 | Output lto objects containing both the intermediate language and binary output. |
1225 | ||
6ff3a151 | 1226 | ffinite-math-only |
5e46b0c6 | 1227 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
f3fdaec4 | 1228 | Assume no NaNs or infinities are generated |
6ff3a151 | 1229 | |
058de654 | 1230 | ffixed- |
21bf1558 | 1231 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1232 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 1233 | |
de32c0cb | 1234 | ffloat-store |
c662432e | 1235 | Common Report Var(flag_float_store) Optimization |
31b66477 | 1236 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
1237 | |
1238 | fforce-addr | |
2d2bd949 | 1239 | Common Ignore |
3de5e93a | 1240 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1241 | |
2ca2b607 SB |
1242 | fforward-propagate |
1243 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
1244 | Perform a forward propagation pass on RTL |
1245 | ||
16949072 | 1246 | ffp-contract= |
e6d4b984 | 1247 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) |
16949072 RG |
1248 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
1249 | ||
e6d4b984 JM |
1250 | Enum |
1251 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1252 | ||
1253 | EnumValue | |
1254 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1255 | ||
1256 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1257 | EnumValue | |
1258 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1259 | ||
1260 | EnumValue | |
1261 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1262 | ||
31b66477 KC |
1263 | ; Nonzero means don't put addresses of constant functions in registers. |
1264 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1265 | ; done on the assembly output. | |
de32c0cb | 1266 | ffunction-cse |
50431bc4 | 1267 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 1268 | Allow function addresses to be held in registers |
de32c0cb | 1269 | |
6ff3a151 | 1270 | ffunction-sections |
50431bc4 | 1271 | Common Report Var(flag_function_sections) |
f3fdaec4 | 1272 | Place each function into its own section |
6ff3a151 | 1273 | |
de32c0cb | 1274 | fgcse |
c662432e | 1275 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 1276 | Perform global common subexpression elimination |
de32c0cb NB |
1277 | |
1278 | fgcse-lm | |
c662432e | 1279 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 1280 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
1281 | |
1282 | fgcse-sm | |
c662432e | 1283 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 1284 | Perform store motion after global common subexpression elimination |
de32c0cb | 1285 | |
f5f2e3cd | 1286 | fgcse-las |
c662432e | 1287 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
1288 | Perform redundant load after store elimination in global common subexpression |
1289 | elimination | |
1290 | ||
1291 | fgcse-after-reload | |
c662432e | 1292 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 1293 | Perform global common subexpression elimination after register allocation |
c85ce869 | 1294 | has finished |
f5f2e3cd | 1295 | |
d0a58904 | 1296 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
1297 | fgraphite |
1298 | Common Report Var(flag_graphite) | |
1299 | Enable in and out of Graphite representation | |
1300 | ||
204b560f SP |
1301 | fgraphite-identity |
1302 | Common Report Var(flag_graphite_identity) Optimization | |
1303 | Enable Graphite Identity transformation | |
1304 | ||
372a6eb8 BS |
1305 | fhoist-adjacent-loads |
1306 | Common Report Var(flag_hoist_adjacent_loads) Optimization | |
1307 | Enable hoisting adjacent loads to encourage generating conditional move | |
1308 | instructions | |
1309 | ||
3cf0e270 SP |
1310 | floop-parallelize-all |
1311 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
1312 | Mark all loops as parallel |
1313 | ||
f8bf9252 SP |
1314 | floop-strip-mine |
1315 | Common Report Var(flag_loop_strip_mine) Optimization | |
1316 | Enable Loop Strip Mining transformation | |
1317 | ||
1318 | floop-interchange | |
1319 | Common Report Var(flag_loop_interchange) Optimization | |
1320 | Enable Loop Interchange transformation | |
1321 | ||
1322 | floop-block | |
1323 | Common Report Var(flag_loop_block) Optimization | |
1324 | Enable Loop Blocking transformation | |
1325 | ||
20d3465b MN |
1326 | floop-unroll-and-jam |
1327 | Common Report Var(flag_loop_unroll_jam) Optimization | |
1328 | Enable Loop Unroll Jam transformation | |
1329 | ||
0a35513e AH |
1330 | fgnu-tm |
1331 | Common Report Var(flag_tm) | |
1332 | Enable support for GNU transactional memory | |
1333 | ||
da34ade5 JM |
1334 | fgnu-unique |
1335 | Common Report Var(flag_gnu_unique) Init(1) | |
1336 | Use STB_GNU_UNIQUE if supported by the assembler | |
1337 | ||
98af4c9f | 1338 | floop-flatten |
093193be MK |
1339 | Common Ignore |
1340 | Does nothing. Preserved for backward compatibility. | |
98af4c9f | 1341 | |
b60cc080 TG |
1342 | floop-nest-optimize |
1343 | Common Report Var(flag_loop_optimize_isl) Optimization | |
1344 | Enable the ISL based loop nest optimizer | |
1345 | ||
6a78b724 DD |
1346 | fstrict-volatile-bitfields |
1347 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
1348 | Force bitfield accesses to match their type width | |
1349 | ||
6ff3a151 | 1350 | fguess-branch-probability |
c662432e | 1351 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 1352 | Enable guessing of branch probabilities |
6ff3a151 | 1353 | |
31b66477 KC |
1354 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1355 | ; Generate position-independent code for executables if possible | |
1356 | ; On SVR4 targets, it also controls whether or not to emit a | |
1357 | ; string identifying the compiler. | |
6ff3a151 | 1358 | fident |
50431bc4 | 1359 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 1360 | Process #ident directives |
6ff3a151 | 1361 | |
de32c0cb | 1362 | fif-conversion |
c662432e | 1363 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 1364 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
1365 | |
1366 | fif-conversion2 | |
c662432e | 1367 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 1368 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 1369 | |
87e2a8fd XDL |
1370 | fstack-reuse= |
1371 | Common Joined RejectNegative Enum(stack_reuse_level) Var(flag_stack_reuse) Init(SR_ALL) | |
1372 | -fstack-reuse=[all|named_vars|none] Set stack reuse level for local variables. | |
1373 | ||
1374 | Enum | |
1375 | Name(stack_reuse_level) Type(enum stack_reuse_level) UnknownError(unknown Stack Reuse Level %qs) | |
1376 | ||
1377 | EnumValue | |
1378 | Enum(stack_reuse_level) String(all) Value(SR_ALL) | |
1379 | ||
1380 | EnumValue | |
1381 | Enum(stack_reuse_level) String(named_vars) Value(SR_NAMED_VARS) | |
1382 | ||
1383 | EnumValue | |
1384 | Enum(stack_reuse_level) String(none) Value(SR_NONE) | |
1385 | ||
384a5197 SP |
1386 | ftree-loop-if-convert |
1387 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1388 | Convert conditional jumps in innermost loops to branchless equivalents | |
1389 | ||
bd544141 SP |
1390 | ftree-loop-if-convert-stores |
1391 | Common Report Var(flag_tree_loop_if_convert_stores) Optimization | |
1392 | Also if-convert conditional jumps containing memory writes | |
1393 | ||
31b66477 KC |
1394 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1395 | ; This is used only for compiling crtstuff.c, | |
1396 | ; and it may be extended to other effects | |
1397 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1398 | finhibit-size-directive |
50431bc4 | 1399 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 1400 | Do not generate .size directives |
6ff3a151 | 1401 | |
3e293154 | 1402 | findirect-inlining |
2bf86c84 | 1403 | Common Report Var(flag_indirect_inlining) Optimization |
3e293154 MJ |
1404 | Perform indirect inlining |
1405 | ||
99ea07f8 RG |
1406 | ; General flag to enable inlining. Specifying -fno-inline will disable |
1407 | ; all inlining apart from always-inline functions. | |
de32c0cb | 1408 | finline |
0f042bc5 | 1409 | Common Report Var(flag_no_inline,0) Init(0) Optimization |
99ea07f8 | 1410 | Enable inlining of function declared \"inline\", disabling disables all inlining |
de32c0cb | 1411 | |
4d4b8cb9 JH |
1412 | finline-small-functions |
1413 | Common Report Var(flag_inline_small_functions) Optimization | |
99ea07f8 | 1414 | Integrate functions into their callers when code size is known not to grow |
4d4b8cb9 | 1415 | |
de32c0cb | 1416 | finline-functions |
c662432e | 1417 | Common Report Var(flag_inline_functions) Optimization |
99ea07f8 | 1418 | Integrate functions not declared \"inline\" into their callers when profitable |
de32c0cb | 1419 | |
355866de | 1420 | finline-functions-called-once |
fb37c1de | 1421 | Common Report Var(flag_inline_functions_called_once) Optimization |
99ea07f8 | 1422 | Integrate functions only required by their single caller |
d63db217 | 1423 | |
d302c9d6 | 1424 | finline-limit- |
5de8299c | 1425 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1426 | |
1427 | finline-limit= | |
1428 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1429 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 1430 | |
86951993 AM |
1431 | finline-atomics |
1432 | Common Report Var(flag_inline_atomics) Init(1) Optimization | |
1433 | Inline __atomic operations when a lock free instruction sequence is available. | |
1434 | ||
6ff3a151 | 1435 | finstrument-functions |
50431bc4 | 1436 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 1437 | Instrument function entry and exit with profiling calls |
6ff3a151 | 1438 | |
8d5a7d1f ILT |
1439 | finstrument-functions-exclude-function-list= |
1440 | Common RejectNegative Joined | |
1441 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
1442 | ||
1443 | finstrument-functions-exclude-file-list= | |
1444 | Common RejectNegative Joined | |
1445 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
1446 | ||
d6e14e8f | 1447 | fipa-cp |
c662432e | 1448 | Common Report Var(flag_ipa_cp) Optimization |
bbc9396b | 1449 | Perform interprocedural constant propagation |
d6e14e8f | 1450 | |
5e45130d JH |
1451 | fipa-cp-clone |
1452 | Common Report Var(flag_ipa_cp_clone) Optimization | |
1453 | Perform cloning to make Interprocedural constant propagation stronger | |
1454 | ||
e65bb9be JH |
1455 | fipa-profile |
1456 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
1457 | Perform interprocedural profile propagation | |
ea900239 | 1458 | |
4cf4d6a3 | 1459 | fipa-pta |
c662432e | 1460 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
1461 | Perform interprocedural points-to analysis |
1462 | ||
e65bb9be JH |
1463 | fipa-pure-const |
1464 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
1465 | Discover pure and const functions | |
1466 | ||
b84d4347 ML |
1467 | fipa-icf |
1468 | Common Report Var(flag_ipa_icf) Optimization | |
1469 | Perform Identical Code Folding for functions and read-only variables | |
1470 | ||
1471 | fipa-icf-functions | |
1472 | Common Report Var(flag_ipa_icf_functions) Optimization | |
1473 | Perform Identical Code Folding for functions | |
1474 | ||
1475 | fipa-icf-variables | |
1476 | Common Report Var(flag_ipa_icf_variables) Optimization | |
1477 | Perform Identical Code Folding for variables | |
1478 | ||
ea900239 | 1479 | fipa-reference |
c662432e | 1480 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
1481 | Discover readonly and non addressable static variables |
1482 | ||
43d861a5 | 1483 | fipa-matrix-reorg |
04f92ff4 RG |
1484 | Common Ignore |
1485 | Does nothing. Preserved for backward compatibility. | |
43d861a5 | 1486 | |
e1dc98b2 | 1487 | fipa-struct-reorg |
b8beb4d1 RG |
1488 | Common Ignore |
1489 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1490 | |
058e97ec | 1491 | fira-algorithm= |
e6d4b984 | 1492 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) |
7db7ed3c VM |
1493 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
1494 | ||
e6d4b984 JM |
1495 | Enum |
1496 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1497 | ||
1498 | EnumValue | |
1499 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1500 | ||
1501 | EnumValue | |
1502 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1503 | ||
7db7ed3c | 1504 | fira-region= |
ffe8727f | 1505 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_AUTODETECT) |
7db7ed3c | 1506 | -fira-region=[one|all|mixed] Set regions for IRA |
058e97ec | 1507 | |
e6d4b984 JM |
1508 | Enum |
1509 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1510 | ||
1511 | EnumValue | |
1512 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1513 | ||
1514 | EnumValue | |
1515 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1516 | ||
1517 | EnumValue | |
1518 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1519 | ||
b11f0116 BC |
1520 | fira-hoist-pressure |
1521 | Common Report Var(flag_ira_hoist_pressure) Init(1) Optimization | |
1522 | Use IRA based register pressure calculation | |
1523 | in RTL hoist optimizations. | |
1524 | ||
1833192f | 1525 | fira-loop-pressure |
f3d83ffe | 1526 | Common Report Var(flag_ira_loop_pressure) Optimization |
1833192f VM |
1527 | Use IRA based register pressure calculation |
1528 | in RTL loop optimizations. | |
1529 | ||
058e97ec VM |
1530 | fira-share-save-slots |
1531 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
1532 | Share slots for saving different hard registers. | |
1533 | ||
1534 | fira-share-spill-slots | |
1535 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
1536 | Share stack slots for spilled pseudo-registers. | |
1537 | ||
1538 | fira-verbose= | |
5498f011 | 1539 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1540 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1541 | |
8b11a64c | 1542 | fivopts |
c662432e | 1543 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
1544 | Optimize induction variables on trees |
1545 | ||
82c0180d | 1546 | fjump-tables |
c662432e | 1547 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
1548 | Use jump tables for sufficiently large switch statements |
1549 | ||
de32c0cb | 1550 | fkeep-inline-functions |
50431bc4 | 1551 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 1552 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
1553 | |
1554 | fkeep-static-consts | |
50431bc4 | 1555 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 1556 | Emit static const variables even if they are not used |
de32c0cb | 1557 | |
6ff3a151 | 1558 | fleading-underscore |
50431bc4 | 1559 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 1560 | Give external symbols a leading underscore |
6ff3a151 | 1561 | |
efa1cdf0 | 1562 | floop-optimize |
2d2bd949 | 1563 | Common Ignore |
c0220ea4 | 1564 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1565 | |
d9cf932c VM |
1566 | flra-remat |
1567 | Common Report Var(flag_lra_remat) Optimization | |
1568 | Do CFG-sensitive rematerialization in LRA | |
1569 | ||
d7f09764 | 1570 | flto |
014d92e1 | 1571 | Common |
d7f09764 DN |
1572 | Enable link-time optimization. |
1573 | ||
014d92e1 JH |
1574 | flto= |
1575 | Common RejectNegative Joined Var(flag_lto) | |
1576 | Link-time optimization with number of parallel jobs or jobserver. | |
1577 | ||
783dab6b RB |
1578 | Enum |
1579 | Name(lto_partition_model) Type(enum lto_partition_model) UnknownError(unknown LTO partitioning model %qs) | |
852e4bd2 | 1580 | |
783dab6b RB |
1581 | EnumValue |
1582 | Enum(lto_partition_model) String(none) Value(LTO_PARTITION_NONE) | |
852e4bd2 | 1583 | |
783dab6b RB |
1584 | EnumValue |
1585 | Enum(lto_partition_model) String(one) Value(LTO_PARTITION_ONE) | |
1586 | ||
1587 | EnumValue | |
1588 | Enum(lto_partition_model) String(balanced) Value(LTO_PARTITION_BALANCED) | |
1589 | ||
1590 | EnumValue | |
1591 | Enum(lto_partition_model) String(1to1) Value(LTO_PARTITION_1TO1) | |
1592 | ||
1593 | EnumValue | |
1594 | Enum(lto_partition_model) String(max) Value(LTO_PARTITION_MAX) | |
c3c445e1 | 1595 | |
783dab6b RB |
1596 | flto-partition= |
1597 | Common Joined RejectNegative Enum(lto_partition_model) Var(flag_lto_partition) Init(LTO_PARTITION_BALANCED) | |
1598 | Specify the algorithm to partition symbols and vars at linktime | |
014d92e1 | 1599 | |
d7f09764 DN |
1600 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1601 | flto-compression-level= | |
fcfbd84e | 1602 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
f94e1d66 | 1603 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 | 1604 | |
1ee85ee1 JH |
1605 | flto-odr-type-merging |
1606 | Common Report Var(flag_lto_odr_type_mering) Init(1) | |
1607 | Merge C++ types using One Definition Rule | |
1608 | ||
d7f09764 | 1609 | flto-report |
1d67dde8 | 1610 | Common Report Var(flag_lto_report) Init(0) |
d7f09764 DN |
1611 | Report various link-time optimization statistics |
1612 | ||
057f8f20 AK |
1613 | flto-report-wpa |
1614 | Common Report Var(flag_lto_report_wpa) Init(0) | |
1615 | Report various link-time optimization statistics for WPA only | |
1616 | ||
6ff3a151 | 1617 | fmath-errno |
5e46b0c6 | 1618 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1619 | Set errno after built-in math functions |
6ff3a151 | 1620 | |
3a789837 NF |
1621 | fmax-errors= |
1622 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
1623 | -fmax-errors=<number> Maximum number of errors to report | |
1624 | ||
6ff3a151 | 1625 | fmem-report |
50431bc4 | 1626 | Common Report Var(mem_report) |
f3fdaec4 | 1627 | Report on permanent memory allocation |
6ff3a151 | 1628 | |
b3e44629 AK |
1629 | fmem-report-wpa |
1630 | Common Report Var(mem_report_wpa) | |
1631 | Report on permanent memory allocation in WPA only | |
1632 | ||
31b66477 KC |
1633 | ; This will attempt to merge constant section constants, if 1 only |
1634 | ; string constants and constants from constant pool, if 2 also constant | |
1635 | ; variables. | |
6ff3a151 | 1636 | fmerge-all-constants |
c662432e | 1637 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 1638 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
1639 | |
1640 | fmerge-constants | |
f0036cca | 1641 | Common Report Var(flag_merge_constants,1) Optimization |
f3fdaec4 | 1642 | Attempt to merge identical constants across compilation units |
6ff3a151 | 1643 | |
28a08168 ILT |
1644 | fmerge-debug-strings |
1645 | Common Report Var(flag_merge_debug_strings) Init(1) | |
1646 | Attempt to merge identical debug strings across compilation units | |
1647 | ||
de32c0cb NB |
1648 | fmessage-length= |
1649 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1650 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 1651 | |
e5626198 | 1652 | fmodulo-sched |
c662432e | 1653 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
1654 | Perform SMS based modulo scheduling before the first scheduling pass |
1655 | ||
517d76fa VY |
1656 | fmodulo-sched-allow-regmoves |
1657 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
1658 | Perform SMS based modulo scheduling with register moves allowed | |
1659 | ||
5e962776 | 1660 | fmove-loop-invariants |
14379e66 | 1661 | Common Report Var(flag_move_loop_invariants) Optimization |
5e962776 ZD |
1662 | Move loop invariant computations out of loops |
1663 | ||
6fb5fa3c | 1664 | fdce |
6ae4be32 | 1665 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
1666 | Use the RTL dead code elimination pass |
1667 | ||
1668 | fdse | |
6ae4be32 | 1669 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
1670 | Use the RTL dead store elimination pass |
1671 | ||
d72372e4 | 1672 | freschedule-modulo-scheduled-loops |
c662432e | 1673 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
1674 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
1675 | ||
6ff3a151 | 1676 | fnon-call-exceptions |
c662432e | 1677 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 1678 | Support synchronous non-call exceptions |
6ff3a151 | 1679 | |
c713ddc0 BS |
1680 | foffload= |
1681 | Common Driver Joined MissingArgError(options or targets missing after %qs) | |
1682 | -foffload=<targets>=<options> Specify offloading targets and options for them | |
1683 | ||
1684 | foffload-abi= | |
1685 | Common Joined RejectNegative Enum(offload_abi) Var(flag_offload_abi) Init(OFFLOAD_ABI_UNSET) | |
1686 | -foffload-abi=[lp64|ilp32] Set the ABI to use in an offload compiler | |
1687 | ||
1688 | Enum | |
1689 | Name(offload_abi) Type(enum offload_abi) UnknownError(unknown offload ABI %qs) | |
1690 | ||
1691 | EnumValue | |
1692 | Enum(offload_abi) String(ilp32) Value(OFFLOAD_ABI_ILP32) | |
1693 | ||
1694 | EnumValue | |
1695 | Enum(offload_abi) String(lp64) Value(OFFLOAD_ABI_LP64) | |
1696 | ||
de32c0cb | 1697 | fomit-frame-pointer |
c662432e | 1698 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 1699 | When possible do not generate stack frames |
de32c0cb | 1700 | |
78c60e3d SS |
1701 | fopt-info |
1702 | Common Report Var(flag_opt_info) Optimization | |
1703 | Enable all optimization info dumps on stderr | |
1704 | ||
1705 | fopt-info- | |
1706 | Common Joined RejectNegative Var(common_deferred_options) Defer | |
1707 | -fopt-info[-<type>=filename] Dump compiler optimization details | |
1708 | ||
6ff3a151 | 1709 | foptimize-register-move |
3b6d1699 VM |
1710 | Common Ignore |
1711 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1712 | |
de32c0cb | 1713 | foptimize-sibling-calls |
c662432e | 1714 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 1715 | Optimize sibling and tail recursive calls |
de32c0cb | 1716 | |
3e485f62 JH |
1717 | fpartial-inlining |
1718 | Common Report Var(flag_partial_inlining) | |
1719 | Perform partial inlining | |
1720 | ||
a5573239 JH |
1721 | fpre-ipa-mem-report |
1722 | Common Report Var(pre_ipa_mem_report) | |
1723 | Report on memory allocation before interprocedural optimization | |
1724 | ||
1725 | fpost-ipa-mem-report | |
1726 | Common Report Var(post_ipa_mem_report) | |
1727 | Report on memory allocation before interprocedural optimization | |
1728 | ||
6ff3a151 | 1729 | fpack-struct |
c662432e | 1730 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 1731 | Pack structure members together without holes |
6ff3a151 | 1732 | |
467cecf3 | 1733 | fpack-struct= |
c662432e | 1734 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
1735 | -fpack-struct=<number> Set initial maximum structure member alignment |
1736 | ||
de32c0cb | 1737 | fpcc-struct-return |
5498f011 | 1738 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
f3fdaec4 | 1739 | Return small aggregates in memory, not registers |
de32c0cb NB |
1740 | |
1741 | fpeel-loops | |
c662432e | 1742 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 1743 | Perform loop peeling |
de32c0cb NB |
1744 | |
1745 | fpeephole | |
c662432e | 1746 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 1747 | Enable machine specific peephole optimizations |
de32c0cb | 1748 | |
6ff3a151 | 1749 | fpeephole2 |
c662432e | 1750 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 1751 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 1752 | |
31b66477 | 1753 | fPIC |
da0aa2cc | 1754 | Common Report Var(flag_pic,2) Negative(fPIE) |
31b66477 KC |
1755 | Generate position-independent code if possible (large mode) |
1756 | ||
1757 | fPIE | |
da0aa2cc | 1758 | Common Report Var(flag_pie,2) Negative(fpic) |
31b66477 KC |
1759 | Generate position-independent code for executables if possible (large mode) |
1760 | ||
6ff3a151 | 1761 | fpic |
da0aa2cc | 1762 | Common Report Var(flag_pic,1) Negative(fpie) |
31b66477 | 1763 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
1764 | |
1765 | fpie | |
da0aa2cc | 1766 | Common Report Var(flag_pie,1) Negative(fPIC) |
31b66477 | 1767 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 1768 | |
68a607d8 | 1769 | fplugin= |
21bf1558 | 1770 | Common Joined RejectNegative Var(common_deferred_options) Defer |
68a607d8 DN |
1771 | Specify a plugin to load |
1772 | ||
1773 | fplugin-arg- | |
21bf1558 | 1774 | Common Joined RejectNegative Var(common_deferred_options) Defer |
f94e1d66 | 1775 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 1776 | |
bbc8a8dc | 1777 | fpredictive-commoning |
6ae4be32 | 1778 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
1779 | Run predictive commoning optimization. |
1780 | ||
de32c0cb | 1781 | fprefetch-loop-arrays |
1fbb509a | 1782 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
f3fdaec4 | 1783 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 1784 | |
6ff3a151 | 1785 | fprofile |
50431bc4 | 1786 | Common Report Var(profile_flag) |
f3fdaec4 | 1787 | Enable basic program profiling code |
6ff3a151 NB |
1788 | |
1789 | fprofile-arcs | |
50431bc4 | 1790 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 1791 | Insert arc-based program profiling code |
6ff3a151 | 1792 | |
2f908293 | 1793 | fprofile-dir= |
0576d21f | 1794 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
1795 | Set the top-level directory for storing the profile data. |
1796 | The default is 'pwd'. | |
1797 | ||
52c76998 PY |
1798 | fprofile-correction |
1799 | Common Report Var(flag_profile_correction) | |
1800 | Enable correction of flow inconsistent profile data input | |
1801 | ||
a8a5f53a JH |
1802 | fprofile-generate |
1803 | Common | |
1804 | Enable common options for generating profile info for profile feedback directed optimizations | |
1805 | ||
2f908293 SP |
1806 | fprofile-generate= |
1807 | Common Joined RejectNegative | |
1808 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
1809 | ||
a8a5f53a | 1810 | fprofile-use |
2f908293 | 1811 | Common Var(flag_profile_use) |
a8a5f53a JH |
1812 | Enable common options for performing profile feedback directed optimizations |
1813 | ||
2f908293 SP |
1814 | fprofile-use= |
1815 | Common Joined RejectNegative | |
1816 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
1817 | ||
fca9dc00 | 1818 | fprofile-values |
50431bc4 | 1819 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
1820 | Insert code to profile values of expressions |
1821 | ||
37e5402b JH |
1822 | fprofile-report |
1823 | Common Report Var(profile_report) | |
1824 | Report on consistency of profile | |
1825 | ||
9cec31f4 ML |
1826 | fprofile-reorder-functions |
1827 | Common Report Var(flag_profile_reorder_functions) | |
1828 | Enable function reordering that improves code placement | |
1829 | ||
de32c0cb | 1830 | frandom-seed |
299404a1 | 1831 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
1832 | |
1833 | frandom-seed= | |
299404a1 | 1834 | Common Joined RejectNegative Var(common_deferred_options) Defer |
fd960af2 | 1835 | -frandom-seed=<number> Make compile reproducible using <number> |
de32c0cb | 1836 | |
e0d9d0dd NC |
1837 | ; This switch causes the command line that was used to create an |
1838 | ; object file to be recorded into the object file. The exact format | |
1839 | ; of this recording is target and binary file format dependent. | |
1840 | ; It is related to the -fverbose-asm switch, but that switch only | |
1841 | ; records information in the assembler output file as comments, so | |
1842 | ; they never reach the object file. | |
1843 | frecord-gcc-switches | |
1844 | Common Report Var(flag_record_gcc_switches) | |
1845 | Record gcc command line switches in the object file. | |
1846 | ||
de32c0cb | 1847 | freg-struct-return |
f0036cca | 1848 | Common Report Var(flag_pcc_struct_return,0) Optimization |
f3fdaec4 | 1849 | Return small aggregates in registers |
de32c0cb | 1850 | |
6ff3a151 | 1851 | fregmove |
3b6d1699 VM |
1852 | Common Ignore |
1853 | Does nothing. Preserved for backward compatibility. | |
6ff3a151 | 1854 | |
f20f2613 VM |
1855 | flive-range-shrinkage |
1856 | Common Report Var(flag_live_range_shrinkage) Init(0) Optimization | |
1857 | Relief of register pressure through live range shrinkage | |
1858 | ||
6ff3a151 | 1859 | frename-registers |
c662432e | 1860 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 1861 | Perform a register renaming optimization pass |
6ff3a151 | 1862 | |
b16abbcb BC |
1863 | fschedule-fusion |
1864 | Common Report Var(flag_schedule_fusion) Init(2) Optimization | |
1865 | Perform a target dependent instruction fusion optimization pass | |
1866 | ||
6ff3a151 | 1867 | freorder-blocks |
c662432e | 1868 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 1869 | Reorder basic blocks to improve code placement |
6ff3a151 | 1870 | |
750054a2 | 1871 | freorder-blocks-and-partition |
c662432e | 1872 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
1873 | Reorder basic blocks and partition into hot and cold sections |
1874 | ||
6ff3a151 | 1875 | freorder-functions |
c662432e | 1876 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 1877 | Reorder functions to improve code placement |
6ff3a151 | 1878 | |
de32c0cb | 1879 | frerun-cse-after-loop |
3020190e | 1880 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
f3fdaec4 | 1881 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1882 | |
efa1cdf0 | 1883 | frerun-loop-opt |
2d2bd949 | 1884 | Common Ignore |
c0220ea4 | 1885 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1886 | |
039c3d42 | 1887 | frounding-math |
5e46b0c6 | 1888 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
039c3d42 RS |
1889 | Disable optimizations that assume default FP rounding behavior |
1890 | ||
6ff3a151 | 1891 | fsched-interblock |
c662432e | 1892 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1893 | Enable scheduling across basic blocks |
6ff3a151 | 1894 | |
ce18efcb VM |
1895 | fsched-pressure |
1896 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1897 | Enable register pressure sensitive insn scheduling | |
1898 | ||
6ff3a151 | 1899 | fsched-spec |
c662432e | 1900 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1901 | Allow speculative motion of non-loads |
6ff3a151 NB |
1902 | |
1903 | fsched-spec-load | |
c662432e | 1904 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1905 | Allow speculative motion of some loads |
6ff3a151 NB |
1906 | |
1907 | fsched-spec-load-dangerous | |
c662432e | 1908 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1909 | Allow speculative motion of more loads |
6ff3a151 | 1910 | |
de32c0cb | 1911 | fsched-verbose= |
299404a1 | 1912 | Common RejectNegative Joined UInteger Var(sched_verbose_param) |
cf03fd63 | 1913 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1914 | |
6ff3a151 | 1915 | fsched2-use-superblocks |
c662432e | 1916 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1917 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1918 | |
1919 | fsched2-use-traces | |
2d2bd949 | 1920 | Common Ignore |
57257f0d | 1921 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1922 | |
de32c0cb | 1923 | fschedule-insns |
c662432e | 1924 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1925 | Reschedule instructions before register allocation |
de32c0cb NB |
1926 | |
1927 | fschedule-insns2 | |
c662432e | 1928 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1929 | Reschedule instructions after register allocation |
de32c0cb | 1930 | |
e855c69d AB |
1931 | ; This flag should be on when a target implements non-trivial |
1932 | ; scheduling hooks, maybe saving some information for its own sake. | |
1933 | ; On IA64, for example, this is used for correct bundling. | |
1934 | fselective-scheduling | |
1935 | Common Report Var(flag_selective_scheduling) Optimization | |
1936 | Schedule instructions using selective scheduling algorithm | |
1937 | ||
1938 | fselective-scheduling2 | |
1939 | Common Report Var(flag_selective_scheduling2) Optimization | |
1940 | Run selective scheduling after reload | |
1941 | ||
1942 | fsel-sched-pipelining | |
1943 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1944 | Perform software pipelining of inner loops during selective scheduling | |
1945 | ||
1946 | fsel-sched-pipelining-outer-loops | |
1947 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1948 | Perform software pipelining of outer loops during selective scheduling | |
1949 | ||
1950 | fsel-sched-reschedule-pipelined | |
1951 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1952 | Reschedule pipelined regions without pipelining | |
1953 | ||
e288a46c JH |
1954 | fsemantic-interposition |
1955 | Common Report Var(flag_semantic_interposition) Init(1) | |
1956 | Allow interposing function (or variables) by ones with different semantics (or initializer) respectively by dynamic linker | |
1957 | ||
31b66477 KC |
1958 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1959 | ; of stalled insns into the ready list. | |
569fa502 | 1960 | fsched-stalled-insns |
ab442df7 | 1961 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1962 | Allow premature scheduling of queued insns |
1963 | ||
1964 | fsched-stalled-insns= | |
c22cacf3 | 1965 | Common RejectNegative Joined UInteger |
4e994432 | 1966 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1967 | |
31b66477 KC |
1968 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1969 | ; be examined for a dependency on a stalled insn that is candidate for | |
1970 | ; premature removal from the queue of stalled insns into the ready list (has | |
1971 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1972 | fsched-stalled-insns-dep |
ab442df7 | 1973 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1974 | Set dependence distance checking in premature scheduling of queued insns |
1975 | ||
1976 | fsched-stalled-insns-dep= | |
1977 | Common RejectNegative Joined UInteger | |
4e994432 | 1978 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1979 | |
ee4764a8 GS |
1980 | fsched-group-heuristic |
1981 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1982 | Enable the group heuristic in the scheduler | |
1983 | ||
1984 | fsched-critical-path-heuristic | |
1985 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1986 | Enable the critical path heuristic in the scheduler | |
1987 | ||
1988 | fsched-spec-insn-heuristic | |
1989 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1990 | Enable the speculative instruction heuristic in the scheduler | |
1991 | ||
ee4764a8 GS |
1992 | fsched-rank-heuristic |
1993 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1994 | Enable the rank heuristic in the scheduler | |
1995 | ||
1996 | fsched-last-insn-heuristic | |
1997 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1998 | Enable the last instruction heuristic in the scheduler | |
1999 | ||
2000 | fsched-dep-count-heuristic | |
2001 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
2002 | Enable the dependent count heuristic in the scheduler | |
2003 | ||
aacd3885 | 2004 | fsection-anchors |
c662432e | 2005 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
2006 | Access data in the same section from shared anchor points |
2007 | ||
8cd37d0b | 2008 | fsee |
2d2bd949 | 2009 | Common Ignore |
8393a9c8 | 2010 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 2011 | |
87a0ebfd | 2012 | fzee |
26cd9add EI |
2013 | Common Ignore |
2014 | Does nothing. Preserved for backward compatibility. | |
2015 | ||
2016 | free | |
2017 | Common Report Var(flag_ree) Init(0) | |
2018 | Turn on Redundant Extensions Elimination pass. | |
87a0ebfd | 2019 | |
8abb6b22 | 2020 | fshow-column |
1cb42611 | 2021 | Common Report Var(flag_show_column) Init(1) |
e74fe492 | 2022 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 2023 | |
484db665 BS |
2024 | fshrink-wrap |
2025 | Common Report Var(flag_shrink_wrap) Optimization | |
2026 | Emit function prologues only before parts of the function that need it, | |
2027 | rather than at the top of the function. | |
2028 | ||
6ff3a151 | 2029 | fsignaling-nans |
5e46b0c6 | 2030 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
f3fdaec4 | 2031 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 2032 | |
db02da79 | 2033 | fsigned-zeros |
5e46b0c6 | 2034 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
db02da79 RS |
2035 | Disable floating point optimizations that ignore the IEEE signedness of zero |
2036 | ||
6ff3a151 | 2037 | fsingle-precision-constant |
c662432e | 2038 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 2039 | Convert floating point constants to single precision constants |
6ff3a151 | 2040 | |
113d659a | 2041 | fsplit-ivs-in-unroller |
c662432e | 2042 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 2043 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 2044 | |
7458026b ILT |
2045 | fsplit-stack |
2046 | Common Report Var(flag_split_stack) Init(-1) | |
2047 | Generate discontiguous stack frames | |
2048 | ||
e53a16e7 | 2049 | fsplit-wide-types |
21af5cdf | 2050 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
2051 | Split wide types into independent registers |
2052 | ||
68f6df73 RB |
2053 | fssa-phiopt |
2054 | Common Report Var(flag_ssa_phiopt) Optimization | |
2055 | Optimize conditional patterns using SSA PHI nodes | |
2056 | ||
f37a4f14 | 2057 | fvariable-expansion-in-unroller |
c662432e | 2058 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 2059 | Apply variable expansion when loops are unrolled |
f37a4f14 | 2060 | |
b38f3813 EB |
2061 | fstack-check= |
2062 | Common Report RejectNegative Joined | |
2063 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
2064 | ||
6ff3a151 | 2065 | fstack-check |
5de8299c | 2066 | Common Alias(fstack-check=, specific, no) |
b38f3813 | 2067 | Insert stack checking code into the program. Same as -fstack-check=specific |
6ff3a151 | 2068 | |
de32c0cb | 2069 | fstack-limit |
21bf1558 | 2070 | Common Var(common_deferred_options) Defer |
de32c0cb | 2071 | |
058de654 | 2072 | fstack-limit-register= |
21bf1558 | 2073 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 2074 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
2075 | |
2076 | fstack-limit-symbol= | |
21bf1558 | 2077 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 2078 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 2079 | |
7d69de61 RH |
2080 | fstack-protector |
2081 | Common Report Var(flag_stack_protect, 1) | |
2082 | Use propolice as a stack protection method | |
2083 | ||
2084 | fstack-protector-all | |
f0036cca | 2085 | Common Report RejectNegative Var(flag_stack_protect, 2) |
7d69de61 RH |
2086 | Use a stack protection method for every function |
2087 | ||
f6bc1c4a HS |
2088 | fstack-protector-strong |
2089 | Common Report RejectNegative Var(flag_stack_protect, 3) | |
2090 | Use a smart stack protection method for certain functions | |
2091 | ||
d3c12306 EB |
2092 | fstack-usage |
2093 | Common RejectNegative Var(flag_stack_usage) | |
2094 | Output stack usage information on a per-function basis | |
2095 | ||
de32c0cb | 2096 | fstrength-reduce |
2d2bd949 | 2097 | Common Ignore |
c0220ea4 | 2098 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 2099 | |
31b66477 KC |
2100 | ; Nonzero if we should do (language-dependent) alias analysis. |
2101 | ; Typically, this analysis will assume that expressions of certain | |
2102 | ; types do not alias expressions of certain other types. Only used | |
2103 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 2104 | fstrict-aliasing |
c662432e | 2105 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 2106 | Assume strict aliasing rules apply |
6ff3a151 | 2107 | |
eeef0e45 ILT |
2108 | fstrict-overflow |
2109 | Common Report Var(flag_strict_overflow) | |
2110 | Treat signed overflow as undefined | |
2111 | ||
e8053cf5 RH |
2112 | fsync-libcalls |
2113 | Common Report Var(flag_sync_libcalls) Init(1) | |
2114 | Implement __atomic operations via libcalls to legacy __sync functions | |
2115 | ||
de32c0cb | 2116 | fsyntax-only |
50431bc4 | 2117 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 2118 | Check for syntax errors, then stop |
de32c0cb | 2119 | |
6ff3a151 | 2120 | ftest-coverage |
50431bc4 | 2121 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 2122 | Create data files needed by \"gcov\" |
6ff3a151 | 2123 | |
de32c0cb | 2124 | fthread-jumps |
c662432e | 2125 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 2126 | Perform jump threading optimizations |
de32c0cb | 2127 | |
6ff3a151 | 2128 | ftime-report |
50431bc4 | 2129 | Common Report Var(time_report) |
f3fdaec4 | 2130 | Report the time taken by each compiler pass |
6ff3a151 | 2131 | |
058de654 | 2132 | ftls-model= |
e6d4b984 | 2133 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
cf03fd63 | 2134 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 2135 | |
e6d4b984 JM |
2136 | Enum |
2137 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
2138 | ||
2139 | EnumValue | |
2140 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
2141 | ||
2142 | EnumValue | |
2143 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
2144 | ||
2145 | EnumValue | |
2146 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
2147 | ||
2148 | EnumValue | |
2149 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
2150 | ||
474eccc6 | 2151 | ftoplevel-reorder |
d6cc6ec9 | 2152 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
2153 | Reorder top level functions, variables, and asms |
2154 | ||
de32c0cb | 2155 | ftracer |
50431bc4 | 2156 | Common Report Var(flag_tracer) |
f3fdaec4 | 2157 | Perform superblock formation via tail duplication |
de32c0cb | 2158 | |
31b66477 KC |
2159 | ; Zero means that floating-point math operations cannot generate a |
2160 | ; (user-visible) trap. This is the case, for example, in nonstop | |
2161 | ; IEEE 754 arithmetic. | |
6ff3a151 | 2162 | ftrapping-math |
5e46b0c6 | 2163 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 2164 | Assume floating-point operations can trap |
6ff3a151 NB |
2165 | |
2166 | ftrapv | |
c662432e | 2167 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 2168 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 2169 | |
6de9cd9a | 2170 | ftree-ccp |
c662432e | 2171 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
2172 | Enable SSA-CCP optimization on trees |
2173 | ||
0b4b14ac RG |
2174 | ftree-bit-ccp |
2175 | Common Report Var(flag_tree_bit_ccp) Optimization | |
2176 | Enable SSA-BIT-CCP optimization on trees | |
2177 | ||
0bca51f0 | 2178 | ftree-store-ccp |
2d2bd949 | 2179 | Common Ignore |
dce2b2f6 | 2180 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2181 | |
6de9cd9a | 2182 | ftree-ch |
c662432e | 2183 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
2184 | Enable loop header copying on trees |
2185 | ||
21d01365 AO |
2186 | ftree-coalesce-inlined-vars |
2187 | Common Report Var(flag_ssa_coalesce_vars,1) Init(2) RejectNegative Optimization | |
2188 | Enable coalescing of copy-related user variables that are inlined | |
2189 | ||
2190 | ftree-coalesce-vars | |
2191 | Common Report Var(flag_ssa_coalesce_vars,2) Optimization | |
2192 | Enable coalescing of all copy-related user variables | |
2193 | ||
6de9cd9a | 2194 | ftree-copyrename |
c662432e | 2195 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 2196 | Replace SSA temporaries with better names in copies |
6de9cd9a | 2197 | |
0bca51f0 | 2198 | ftree-copy-prop |
c662432e | 2199 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
2200 | Enable copy propagation on trees |
2201 | ||
2202 | ftree-store-copy-prop | |
2d2bd949 | 2203 | Common Ignore |
e9033855 | 2204 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 2205 | |
a5828d1e MM |
2206 | ftree-cselim |
2207 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
2208 | Transform condition stores into unconditional ones | |
2209 | ||
b6e99746 MJ |
2210 | ftree-switch-conversion |
2211 | Common Report Var(flag_tree_switch_conversion) Optimization | |
2212 | Perform conversions of switch initializations. | |
2213 | ||
6de9cd9a | 2214 | ftree-dce |
c662432e | 2215 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
2216 | Enable SSA dead code elimination optimization on trees |
2217 | ||
2218 | ftree-dominator-opts | |
c662432e | 2219 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
2220 | Enable dominator optimizations |
2221 | ||
c9e93168 TV |
2222 | ftree-tail-merge |
2223 | Common Report Var(flag_tree_tail_merge) Optimization | |
2224 | Enable tail merging on trees | |
2225 | ||
6de9cd9a | 2226 | ftree-dse |
c662432e | 2227 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
2228 | Enable dead store elimination |
2229 | ||
248fc9f3 RG |
2230 | ftree-forwprop |
2231 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
2232 | Enable forward propagation on trees | |
2233 | ||
ff2ad0f7 | 2234 | ftree-fre |
c662432e | 2235 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
2236 | Enable Full Redundancy Elimination (FRE) on trees |
2237 | ||
8b57bfeb JJ |
2238 | foptimize-strlen |
2239 | Common Report Var(flag_optimize_strlen) Optimization | |
2240 | Enable string length optimizations on trees | |
2241 | ||
ae93744d JL |
2242 | fisolate-erroneous-paths-dereference |
2243 | Common Report Var(flag_isolate_erroneous_paths_dereference) Optimization | |
408e8aa4 SL |
2244 | Detect paths that trigger erroneous or undefined behavior due to |
2245 | dereferencing a null pointer. Isolate those paths from the main control | |
2246 | flow and turn the statement with erroneous or undefined behavior into a trap. | |
ae93744d JL |
2247 | |
2248 | fisolate-erroneous-paths-attribute | |
2249 | Common Report Var(flag_isolate_erroneous_paths_attribute) Optimization | |
408e8aa4 SL |
2250 | Detect paths that trigger erroneous or undefined behavior due a null value |
2251 | being used in a way forbidden by a returns_nonnull or nonnull | |
ae93744d | 2252 | attribute. Isolate those paths from the main control flow and turn the |
408e8aa4 | 2253 | statement with erroneous or undefined behavior into a trap. |
8fdc414d | 2254 | |
dea61d92 | 2255 | ftree-loop-distribution |
53ed2f0e | 2256 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
2257 | Enable loop distribution on trees |
2258 | ||
20769d5e SP |
2259 | ftree-loop-distribute-patterns |
2260 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
2261 | Enable loop distribution for patterns transformed into a library call | |
2262 | ||
1b08d87d | 2263 | ftree-loop-im |
c662432e | 2264 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
2265 | Enable loop invariant motion on trees |
2266 | ||
599eabdb | 2267 | ftree-loop-linear |
7633415c SP |
2268 | Common Alias(floop-interchange) |
2269 | Enable loop interchange transforms. Same as -floop-interchange | |
599eabdb | 2270 | |
1b08d87d | 2271 | ftree-loop-ivcanon |
c662432e | 2272 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
2273 | Create canonical induction variables in loops |
2274 | ||
c66b6c66 | 2275 | ftree-loop-optimize |
c662432e | 2276 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
2277 | Enable loop optimizations on tree level |
2278 | ||
5f40b3cb | 2279 | ftree-parallelize-loops= |
fcfbd84e | 2280 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
5f40b3cb ZD |
2281 | Enable automatic parallelization of loops |
2282 | ||
248fc9f3 RG |
2283 | ftree-phiprop |
2284 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
2285 | Enable hoisting loads from conditional pointers. | |
2286 | ||
6de9cd9a | 2287 | ftree-pre |
c662432e | 2288 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
2289 | Enable SSA-PRE optimization on trees |
2290 | ||
fa06ad0d JR |
2291 | ftree-partial-pre |
2292 | Common Report Var(flag_tree_partial_pre) Optimization | |
2293 | In SSA-PRE optimization on trees, enable partial-partial redundancy elimination | |
2294 | ||
248fc9f3 | 2295 | ftree-pta |
14379e66 | 2296 | Common Report Var(flag_tree_pta) Optimization |
248fc9f3 RG |
2297 | Perform function-local points-to analysis on trees. |
2298 | ||
13c59415 UB |
2299 | ftree-reassoc |
2300 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
2301 | Enable reassociation on tree level | |
2302 | ||
c75ab022 | 2303 | ftree-salias |
2d2bd949 | 2304 | Common Ignore |
1353232d | 2305 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 2306 | |
fa555252 | 2307 | ftree-sink |
c662432e | 2308 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
2309 | Enable SSA code sinking on trees |
2310 | ||
75cfe445 BS |
2311 | ftree-slsr |
2312 | Common Report Var(flag_tree_slsr) Optimization | |
2313 | Perform straight-line strength reduction | |
2314 | ||
6de9cd9a | 2315 | ftree-sra |
c662432e | 2316 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
2317 | Perform scalar replacement of aggregates |
2318 | ||
2319 | ftree-ter | |
3020190e | 2320 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
2321 | Replace temporary expressions in the SSA->normal pass |
2322 | ||
c662432e NC |
2323 | ftree-lrs |
2324 | Common Report Var(flag_tree_live_range_split) Optimization | |
2325 | Perform live range splitting during the SSA->normal pass | |
2326 | ||
0bca51f0 | 2327 | ftree-vrp |
c662432e | 2328 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
2329 | Perform Value Range Propagation on trees |
2330 | ||
de32c0cb | 2331 | funit-at-a-time |
d6cc6ec9 | 2332 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 2333 | Compile whole compilation unit at a time |
de32c0cb NB |
2334 | |
2335 | funroll-loops | |
c662432e | 2336 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 2337 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
2338 | |
2339 | funroll-all-loops | |
c662432e | 2340 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 2341 | Perform loop unrolling for all loops |
de32c0cb | 2342 | |
f9cc1a70 PB |
2343 | ; Nonzero means that loop optimizer may assume that the induction variables |
2344 | ; that control loops do not overflow and that the loops with nontrivial | |
2345 | ; exit condition are not infinite | |
2346 | funsafe-loop-optimizations | |
c662432e | 2347 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
2348 | Allow loop optimizations to assume that the loops behave in normal way |
2349 | ||
a1a82611 | 2350 | fassociative-math |
5e46b0c6 | 2351 | Common Report Var(flag_associative_math) SetByCombined |
a1a82611 RE |
2352 | Allow optimization for floating-point arithmetic which may change the |
2353 | result of the operation due to rounding. | |
2354 | ||
2355 | freciprocal-math | |
5e46b0c6 | 2356 | Common Report Var(flag_reciprocal_math) SetByCombined |
a1a82611 RE |
2357 | Same as -fassociative-math for expressions which include division. |
2358 | ||
31b66477 KC |
2359 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2360 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2361 | ; are allowed to assume that their arguments and results are "normal" | |
2362 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2363 | funsafe-math-optimizations |
5e46b0c6 | 2364 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
f3fdaec4 | 2365 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 2366 | |
de32c0cb | 2367 | funswitch-loops |
c662432e | 2368 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 2369 | Perform loop unswitching |
de32c0cb | 2370 | |
6ff3a151 | 2371 | funwind-tables |
c662432e | 2372 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 2373 | Just generate unwind tables for exception handling |
6ff3a151 | 2374 | |
b352afba | 2375 | fuse-ld=bfd |
b78e932d | 2376 | Common Driver Negative(fuse-ld=gold) |
b352afba NC |
2377 | Use the bfd linker instead of the default linker |
2378 | ||
2379 | fuse-ld=gold | |
b78e932d | 2380 | Common Driver Negative(fuse-ld=bfd) |
b352afba NC |
2381 | Use the gold linker instead of the default linker |
2382 | ||
da18ea94 | 2383 | fuse-linker-plugin |
063d671d | 2384 | Common Undocumented Var(flag_use_linker_plugin) |
da18ea94 | 2385 | |
e90afde6 JM |
2386 | ; Positive if we should track variables, negative if we should run |
2387 | ; the var-tracking pass only to discard debug annotations, zero if | |
2388 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2389 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2390 | ; in process_options (). | |
014a1138 | 2391 | fvar-tracking |
e90afde6 | 2392 | Common Report Var(flag_var_tracking) Init(2) Optimization |
014a1138 JZ |
2393 | Perform variable tracking |
2394 | ||
e90afde6 JM |
2395 | ; Positive if we should track variables at assignments, negative if |
2396 | ; we should run the var-tracking pass only to discard debug | |
2397 | ; annotations. When flag_var_tracking_assignments == | |
2398 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2399 | fvar-tracking-assignments |
e90afde6 | 2400 | Common Report Var(flag_var_tracking_assignments) Init(2) Optimization |
b5b8b0ac AO |
2401 | Perform variable tracking by annotating assignments |
2402 | ||
e90afde6 JM |
2403 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2404 | ; processing options and computing its default. */ | |
b5b8b0ac | 2405 | fvar-tracking-assignments-toggle |
e90afde6 | 2406 | Common Report Var(flag_var_tracking_assignments_toggle) Optimization |
b5b8b0ac AO |
2407 | Toggle -fvar-tracking-assignments |
2408 | ||
1267ca30 EB |
2409 | ; Positive if we should track uninitialized variables, negative if |
2410 | ; we should run the var-tracking pass only to discard debug | |
2411 | ; annotations. When flag_var_tracking_uninit == AUTODETECT_VALUE it | |
2412 | ; will be set according to flag_var_tracking. | |
62760ffd CT |
2413 | fvar-tracking-uninit |
2414 | Common Report Var(flag_var_tracking_uninit) Optimization | |
2415 | Perform variable tracking and also tag variables that are uninitialized | |
2416 | ||
79fe1b3b | 2417 | ftree-vectorize |
c662432e | 2418 | Common Report Var(flag_tree_vectorize) Optimization |
ea0f3e87 | 2419 | Enable vectorization on trees |
79fe1b3b | 2420 | |
78c60e3d | 2421 | ftree-vectorizer-verbose= |
477e804b SS |
2422 | Common Joined RejectNegative Ignore |
2423 | Does nothing. Preserved for backward compatibility. | |
78c60e3d | 2424 | |
ea0f3e87 XDL |
2425 | ftree-loop-vectorize |
2426 | Common Report Var(flag_tree_loop_vectorize) Optimization | |
2427 | Enable loop vectorization on trees | |
2428 | ||
a70d6342 | 2429 | ftree-slp-vectorize |
ea0f3e87 | 2430 | Common Report Var(flag_tree_slp_vectorize) Optimization |
a70d6342 IR |
2431 | Enable basic block vectorization (SLP) on trees |
2432 | ||
d6d11272 XDL |
2433 | fvect-cost-model= |
2434 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_vect_cost_model) Init(VECT_COST_MODEL_DEFAULT) | |
2435 | Specifies the cost model for vectorization | |
2436 | ||
8b5e1202 SO |
2437 | fsimd-cost-model= |
2438 | Common Joined RejectNegative Enum(vect_cost_model) Var(flag_simd_cost_model) Init(VECT_COST_MODEL_UNLIMITED) | |
2439 | Specifies the vectorization cost model for code marked with a simd directive | |
2440 | ||
d6d11272 XDL |
2441 | Enum |
2442 | Name(vect_cost_model) Type(enum vect_cost_model) UnknownError(unknown vectorizer cost model %qs) | |
2443 | ||
2444 | EnumValue | |
2445 | Enum(vect_cost_model) String(unlimited) Value(VECT_COST_MODEL_UNLIMITED) | |
2446 | ||
2447 | EnumValue | |
2448 | Enum(vect_cost_model) String(dynamic) Value(VECT_COST_MODEL_DYNAMIC) | |
2449 | ||
2450 | EnumValue | |
2451 | Enum(vect_cost_model) String(cheap) Value(VECT_COST_MODEL_CHEAP) | |
2452 | ||
792ed98b | 2453 | fvect-cost-model |
d6d11272 XDL |
2454 | Common RejectNegative Alias(fvect-cost-model=,dynamic) |
2455 | Enables the dynamic vectorizer cost model. Preserved for backward compatibility. | |
2456 | ||
2457 | fno-vect-cost-model | |
2458 | Common RejectNegative Alias(fvect-cost-model=,unlimited) | |
2459 | Enables the unlimited vectorizer cost model. Preserved for backward compatibility. | |
792ed98b | 2460 | |
c12cc930 | 2461 | ftree-vect-loop-version |
d6d11272 XDL |
2462 | Common Ignore |
2463 | Does nothing. Preserved for backward compatibility. | |
c12cc930 | 2464 | |
fbf798fc | 2465 | ftree-scev-cprop |
21af5cdf | 2466 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2467 | Enable copy propagation of scalar-evolution information. |
2468 | ||
31b66477 KC |
2469 | ; -fverbose-asm causes extra commentary information to be produced in |
2470 | ; the generated assembly code (to make it more readable). This option | |
2471 | ; is generally only of use to those who actually need to read the | |
2472 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2473 | ; -fno-verbose-asm, the default, causes the extra information | |
2474 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 2475 | fverbose-asm |
50431bc4 | 2476 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 2477 | Add extra commentary to assembler output |
6ff3a151 | 2478 | |
d7afec4b | 2479 | fvisibility= |
e6d4b984 | 2480 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
d7afec4b ND |
2481 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility |
2482 | ||
e6d4b984 JM |
2483 | Enum |
2484 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
2485 | ||
2486 | EnumValue | |
2487 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
2488 | ||
2489 | EnumValue | |
2490 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
2491 | ||
2492 | EnumValue | |
2493 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
2494 | ||
2495 | EnumValue | |
2496 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 2497 | |
2077db1b CT |
2498 | fvtable-verify= |
2499 | Common Joined RejectNegative Enum(vtv_priority) Var(flag_vtable_verify) Init(VTV_NO_PRIORITY) | |
2500 | Validate vtable pointers before using them. | |
2501 | ||
2502 | Enum | |
2503 | Name(vtv_priority) Type(enum vtv_priority) UnknownError(unknown vtable verify initialization priority %qs) | |
2504 | ||
2505 | EnumValue | |
2506 | Enum(vtv_priority) String(none) Value(VTV_NO_PRIORITY) | |
2507 | ||
2508 | EnumValue | |
2509 | Enum(vtv_priority) String(std) Value(VTV_STANDARD_PRIORITY) | |
2510 | ||
2511 | EnumValue | |
2512 | Enum(vtv_priority) String(preinit) Value(VTV_PREINIT_PRIORITY) | |
2513 | ||
2514 | fvtv-counts | |
2515 | Common Var(flag_vtv_counts) | |
2516 | Output vtable verification counters. | |
2517 | ||
2518 | fvtv-debug | |
2519 | Common Var(flag_vtv_debug) | |
2520 | Output vtable verification pointer sets information. | |
2521 | ||
fca9dc00 | 2522 | fvpt |
c662432e | 2523 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
2524 | Use expression value profiles in optimizations |
2525 | ||
62551c66 | 2526 | fweb |
c662432e | 2527 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
2528 | Construct webs and split unrelated uses of single variable |
2529 | ||
c2699190 XDL |
2530 | ftree-builtin-call-dce |
2531 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
2532 | Enable conditional dead code elimination for builtin calls | |
2533 | ||
ce91e74c | 2534 | fwhole-program |
c662432e | 2535 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
2536 | Perform whole program optimizations |
2537 | ||
6ff3a151 | 2538 | fwrapv |
c662432e | 2539 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 2540 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 2541 | |
6ff3a151 | 2542 | fzero-initialized-in-bss |
50431bc4 | 2543 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 2544 | Put zero initialized data in the bss section |
6ff3a151 | 2545 | |
e01cc6dc NB |
2546 | g |
2547 | Common JoinedOrMissing | |
df38ffef NB |
2548 | Generate debug information in default format |
2549 | ||
2550 | gcoff | |
6782438d | 2551 | Common JoinedOrMissing Negative(gdwarf) |
df38ffef NB |
2552 | Generate debug information in COFF format |
2553 | ||
6782438d SKS |
2554 | gdwarf |
2555 | Common JoinedOrMissing Negative(gdwarf-) | |
2556 | Generate debug information in default version of DWARF format | |
2557 | ||
53b2323e | 2558 | gdwarf- |
98095aa3 | 2559 | Common Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs) |
53b2323e | 2560 | Generate debug information in DWARF v2 (or later) format |
df38ffef NB |
2561 | |
2562 | ggdb | |
2563 | Common JoinedOrMissing | |
2564 | Generate debug information in default extended format | |
2565 | ||
5175cbaf | 2566 | gno-pubnames |
7a1dd0fa | 2567 | Common Negative(gpubnames) Var(debug_generate_pub_sections, 0) Init(-1) |
5175cbaf SA |
2568 | Don't generate DWARF pubnames and pubtypes sections. |
2569 | ||
2570 | gpubnames | |
7a1dd0fa | 2571 | Common Negative(ggnu-pubnames) Var(debug_generate_pub_sections, 1) |
5175cbaf SA |
2572 | Generate DWARF pubnames and pubtypes sections. |
2573 | ||
7a1dd0fa SA |
2574 | ggnu-pubnames |
2575 | Common Negative(gno-pubnames) Var(debug_generate_pub_sections, 2) | |
2576 | Generate DWARF pubnames and pubtypes sections with GNU extensions. | |
2577 | ||
e967adf4 | 2578 | gno-record-gcc-switches |
98095aa3 | 2579 | Common RejectNegative Var(dwarf_record_gcc_switches,0) Init(1) |
e967adf4 JJ |
2580 | Don't record gcc command line switches in DWARF DW_AT_producer. |
2581 | ||
2582 | grecord-gcc-switches | |
2583 | Common RejectNegative Var(dwarf_record_gcc_switches,1) | |
2584 | Record gcc command line switches in DWARF DW_AT_producer. | |
2585 | ||
99ea153e SA |
2586 | gno-split-dwarf |
2587 | Common Driver RejectNegative Var(dwarf_split_debug_info,0) Init(0) | |
2588 | Don't generate debug information in separate .dwo files | |
2589 | ||
2590 | gsplit-dwarf | |
2591 | Common Driver RejectNegative Var(dwarf_split_debug_info,1) | |
2592 | Generate debug information in separate .dwo files | |
2593 | ||
df38ffef | 2594 | gstabs |
14c7833c | 2595 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
2596 | Generate debug information in STABS format |
2597 | ||
2598 | gstabs+ | |
14c7833c | 2599 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
2600 | Generate debug information in extended STABS format |
2601 | ||
65f753a0 | 2602 | gno-strict-dwarf |
98095aa3 | 2603 | Common RejectNegative Var(dwarf_strict,0) Init(0) |
65f753a0 JJ |
2604 | Emit DWARF additions beyond selected version |
2605 | ||
2606 | gstrict-dwarf | |
f0036cca | 2607 | Common Report RejectNegative Var(dwarf_strict,1) |
65f753a0 JJ |
2608 | Don't emit DWARF additions beyond selected version |
2609 | ||
2153915d AO |
2610 | gtoggle |
2611 | Common Report Var(flag_gtoggle) | |
2612 | Toggle debug information generation | |
2613 | ||
df38ffef | 2614 | gvms |
14c7833c | 2615 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
2616 | Generate debug information in VMS format |
2617 | ||
2618 | gxcoff | |
14c7833c | 2619 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
2620 | Generate debug information in XCOFF format |
2621 | ||
2622 | gxcoff+ | |
14c7833c | 2623 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 2624 | Generate debug information in extended XCOFF format |
e01cc6dc | 2625 | |
29d7cbd1 RO |
2626 | Enum |
2627 | Name(compressed_debug_sections) Type(int) | |
2628 | ||
2629 | ; Since -gz= is completely handled in specs, the values aren't used and we | |
2630 | ; assign arbitrary constants. | |
2631 | EnumValue | |
2632 | Enum(compressed_debug_sections) String(none) Value(0) | |
2633 | ||
2634 | EnumValue | |
2635 | Enum(compressed_debug_sections) String(zlib) Value(1) | |
2636 | ||
2637 | EnumValue | |
2638 | Enum(compressed_debug_sections) String(zlib-gnu) Value(2) | |
2639 | ||
2640 | gz | |
2641 | Common Driver | |
2642 | Generate compressed debug sections | |
2643 | ||
2644 | gz= | |
2645 | Common Driver Joined Enum(compressed_debug_sections) | |
2646 | -gz=<format> Generate compressed debug sections in format <format> | |
2647 | ||
6d721f67 JM |
2648 | h |
2649 | Driver Joined Separate | |
2650 | ||
4adbd5dd MK |
2651 | iplugindir= |
2652 | Common Joined Var(plugindir_string) Init(0) | |
2653 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
2654 | ||
e0cdc09f MK |
2655 | imultiarch |
2656 | Common Joined Separate RejectDriver Var(imultiarch) Init(0) | |
2657 | -imultiarch <dir> Set <dir> to be the multiarch include subdirectory | |
2658 | ||
603349bf JM |
2659 | l |
2660 | Driver Joined Separate | |
2661 | ||
dd9f93dc JM |
2662 | n |
2663 | Driver | |
2664 | ||
603349bf JM |
2665 | no-canonical-prefixes |
2666 | Driver | |
2667 | ||
d9d16a19 JM |
2668 | nodefaultlibs |
2669 | Driver | |
2670 | ||
bab79a40 JM |
2671 | nostartfiles |
2672 | Driver | |
2673 | ||
d9d16a19 JM |
2674 | nostdlib |
2675 | Driver | |
2676 | ||
d185d268 | 2677 | o |
d5478783 | 2678 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
cf03fd63 | 2679 | -o <file> Place output into <file> |
d185d268 NB |
2680 | |
2681 | p | |
50431bc4 | 2682 | Common Var(profile_flag) |
cf03fd63 | 2683 | Enable function profiling |
d185d268 | 2684 | |
603349bf JM |
2685 | pass-exit-codes |
2686 | Driver Var(pass_exit_codes) | |
2687 | ||
d185d268 | 2688 | pedantic |
c1771a20 | 2689 | Common Alias(Wpedantic) |
d185d268 NB |
2690 | |
2691 | pedantic-errors | |
d5478783 | 2692 | Common Var(flag_pedantic_errors) |
cf03fd63 | 2693 | Like -pedantic but issue them as errors |
d185d268 | 2694 | |
d9d16a19 JM |
2695 | pg |
2696 | Driver | |
2697 | ||
603349bf JM |
2698 | pipe |
2699 | Driver Var(use_pipes) | |
2700 | ||
2701 | print-file-name= | |
2702 | Driver JoinedOrMissing Var(print_file_name) | |
2703 | ||
2704 | print-libgcc-file-name | |
2705 | Driver | |
2706 | ||
2707 | print-multi-directory | |
2708 | Driver Var(print_multi_directory) | |
2709 | ||
2710 | print-multi-lib | |
2711 | Driver Var(print_multi_lib) | |
2712 | ||
2713 | print-multi-os-directory | |
2714 | Driver Var(print_multi_os_directory) | |
e0cdc09f MK |
2715 | |
2716 | print-multiarch | |
2717 | Driver Var(print_multiarch) | |
603349bf JM |
2718 | |
2719 | print-prog-name= | |
2720 | Driver JoinedOrMissing Var(print_prog_name) | |
2721 | ||
2722 | print-search-dirs | |
2723 | Driver Var(print_search_dirs) | |
2724 | ||
2725 | print-sysroot | |
2726 | Driver Var(print_sysroot) | |
2727 | ||
2728 | print-sysroot-headers-suffix | |
2729 | Driver Var(print_sysroot_headers_suffix) | |
2730 | ||
d7b42618 | 2731 | quiet |
603349bf | 2732 | Common Var(quiet_flag) RejectDriver |
cf03fd63 | 2733 | Do not display functions compiled or elapsed time |
d7b42618 | 2734 | |
dd9f93dc JM |
2735 | r |
2736 | Driver | |
2737 | ||
2738 | s | |
2739 | Driver | |
2740 | ||
603349bf JM |
2741 | save-temps |
2742 | Driver | |
2743 | ||
2744 | save-temps= | |
2745 | Driver Joined | |
2746 | ||
dd9f93dc JM |
2747 | t |
2748 | Driver | |
2749 | ||
603349bf JM |
2750 | time |
2751 | Driver Var(report_times) | |
2752 | ||
2753 | time= | |
2754 | Driver JoinedOrMissing | |
2755 | ||
e200444e JM |
2756 | u |
2757 | Driver Joined Separate | |
2758 | ||
5642f5d5 JM |
2759 | undef |
2760 | Driver | |
2761 | ; C option, but driver must not handle as "-u ndef". | |
2762 | ||
603349bf | 2763 | v |
d5478783 JM |
2764 | Common Driver Var(verbose_flag) |
2765 | Enable verbose output | |
603349bf | 2766 | |
d185d268 | 2767 | version |
603349bf | 2768 | Common Var(version_flag) RejectDriver |
cf03fd63 | 2769 | Display the compiler's version |
d185d268 NB |
2770 | |
2771 | w | |
50431bc4 | 2772 | Common Var(inhibit_warnings) |
cf03fd63 | 2773 | Suppress warnings |
d185d268 | 2774 | |
603349bf JM |
2775 | wrapper |
2776 | Driver Separate Var(wrapper_string) | |
2777 | ||
2778 | x | |
2779 | Driver Joined Separate | |
2780 | ||
528dc603 | 2781 | shared |
5460e1fc | 2782 | Driver RejectNegative Negative(pie) |
528dc603 L |
2783 | Create a shared library |
2784 | ||
603349bf JM |
2785 | shared-libgcc |
2786 | Driver | |
2787 | ||
2788 | specs | |
5de8299c | 2789 | Driver Separate Alias(specs=) |
603349bf JM |
2790 | |
2791 | specs= | |
2792 | Driver Joined | |
2793 | ||
d9d16a19 JM |
2794 | static |
2795 | Driver | |
2796 | ||
603349bf JM |
2797 | static-libgcc |
2798 | Driver | |
2799 | ||
2800 | static-libgfortran | |
2801 | Driver | |
2802 | ; Documented for Fortran, but always accepted by driver. | |
2803 | ||
2804 | static-libstdc++ | |
2805 | Driver | |
2806 | ||
7a938933 ILT |
2807 | static-libgo |
2808 | Driver | |
2809 | ; Documented for Go, but always accepted by driver. | |
2810 | ||
7e8d1b2d L |
2811 | static-libasan |
2812 | Driver | |
2813 | ||
32b4b7f5 DV |
2814 | static-libtsan |
2815 | Driver | |
2816 | ||
9065ada9 JJ |
2817 | static-liblsan |
2818 | Driver | |
2819 | ||
de5a5fa1 MP |
2820 | static-libubsan |
2821 | Driver | |
2822 | ||
e200444e JM |
2823 | symbolic |
2824 | Driver | |
2825 | ||
528dc603 | 2826 | pie |
5460e1fc | 2827 | Driver RejectNegative Negative(shared) |
528dc603 L |
2828 | Create a position independent executable |
2829 | ||
6d721f67 JM |
2830 | z |
2831 | Driver Joined Separate | |
2832 | ||
1e288103 TV |
2833 | fipa-ra |
2834 | Common Report Var(flag_ipa_ra) Optimization | |
d996e61a RO |
2835 | Use caller save register across calls if possible |
2836 | ||
d7b42618 | 2837 | ; This comment is to ensure we retain the blank line above. |