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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 | |
5e46b0c6 | 3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
28a08168 | 4 | ; Free Software Foundation, Inc. |
d7b42618 NB |
5 | ; |
6 | ; This file is part of GCC. | |
7 | ; | |
8 | ; GCC is free software; you can redistribute it and/or modify it under | |
9 | ; the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 10 | ; Software Foundation; either version 3, or (at your option) any later |
d7b42618 | 11 | ; version. |
c22cacf3 | 12 | ; |
d7b42618 NB |
13 | ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | ; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | ; for more details. | |
c22cacf3 | 17 | ; |
d7b42618 | 18 | ; You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
19 | ; along with GCC; see the file COPYING3. If not see |
20 | ; <http://www.gnu.org/licenses/>. | |
d7b42618 | 21 | |
71733172 | 22 | ; See the GCC internals manual (options.texi) for a description of this file's format. |
d7b42618 NB |
23 | |
24 | ; Please try to keep this file in ASCII collating order. | |
25 | ||
e90afde6 JM |
26 | Variable |
27 | int target_flags | |
28 | ||
46625112 JM |
29 | Variable |
30 | int optimize | |
31 | ||
32 | Variable | |
33 | int optimize_size | |
34 | ||
a75bfaa6 JM |
35 | ; 0 means straightforward implementation of complex divide acceptable. |
36 | ; 1 means wide ranges of inputs must work for complex divide. | |
37 | ; 2 means C99-like requirements for complex multiply and divide. | |
38 | Variable | |
39 | int flag_complex_method = 1 | |
40 | ||
41 | ; Nonzero if subexpressions must be evaluated from left-to-right. | |
42 | Variable | |
43 | int flag_evaluation_order = 0 | |
44 | ||
a75bfaa6 JM |
45 | ; Language specific warning pass for unused results. |
46 | Variable | |
47 | bool flag_warn_unused_result = false | |
48 | ||
48476d13 JM |
49 | Variable |
50 | int *param_values | |
51 | ||
d5478783 JM |
52 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
53 | Variable | |
54 | int flag_generate_lto | |
55 | ||
56 | ; True to warn about any objects definitions whose size is larger | |
57 | ; than N bytes. Also want about function definitions whose returned | |
58 | ; values are larger than N bytes, where N is 'larger_than_size'. | |
59 | Variable | |
60 | bool warn_larger_than | |
61 | ||
62 | Variable | |
63 | HOST_WIDE_INT larger_than_size | |
64 | ||
65 | ; True to warn about any function whose frame size is larger | |
66 | ; than N bytes. | |
67 | Variable | |
68 | bool warn_frame_larger_than | |
69 | ||
70 | Variable | |
71 | HOST_WIDE_INT frame_larger_than_size | |
72 | ||
73 | ; Nonzero means we should be saving declaration info into a .X file. | |
74 | Variable | |
75 | int flag_gen_aux_info = 0 | |
76 | ||
77 | ; Nonzero if we are compiling code for a shared library, zero for | |
78 | ; executable. | |
79 | Variable | |
80 | int flag_shlib | |
81 | ||
6a1f6c9c JM |
82 | ; These two are really VEC(char_p,heap) *. |
83 | ||
84 | Variable | |
85 | void *flag_instrument_functions_exclude_functions | |
86 | ||
87 | Variable | |
88 | void *flag_instrument_functions_exclude_files | |
89 | ||
69ccdddb JM |
90 | ; Generic structs (e.g. templates not explicitly specialized) |
91 | ; may not have a compilation unit associated with them, and so | |
92 | ; may need to be treated differently from ordinary structs. | |
93 | ; | |
94 | ; Structs only handled by reference (indirectly), will also usually | |
95 | ; not need as much debugging information. | |
96 | ||
97 | Variable | |
98 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
99 | ||
100 | Variable | |
101 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
102 | ||
0576d21f JM |
103 | ; True if we should exit after parsing options. |
104 | Variable | |
105 | bool exit_after_options | |
106 | ||
107 | ; Type(s) of debugging information we are producing (if any). See | |
108 | ; flag-types.h for the definitions of the different possible types of | |
109 | ; debugging information. | |
110 | Variable | |
111 | enum debug_info_type write_symbols = NO_DEBUG | |
112 | ||
113 | ; Level of debugging information we are producing. See flag-types.h | |
114 | ; for the definitions of the different possible levels. | |
115 | Variable | |
116 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
117 | ||
118 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
119 | ; debugging information. Currently, this only has an effect when | |
120 | ; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. | |
121 | Variable | |
122 | bool use_gnu_debug_info_extensions | |
123 | ||
299404a1 JM |
124 | ; Original value of maximum field alignment in bytes, specified via |
125 | ; -fpack-struct=<value>. | |
126 | Variable | |
127 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
128 | ||
7cd23050 JM |
129 | Variable |
130 | enum vect_verbosity_levels user_vect_verbosity_level = MAX_VERBOSITY_LEVEL | |
131 | ||
5e471ea6 JM |
132 | ; Type of stack check. |
133 | Variable | |
134 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
135 | ||
299404a1 JM |
136 | ; -dA causes debug commentary information to be produced in |
137 | ; the generated assembly code (to make it more readable). This option | |
138 | ; is generally only of use to those who actually need to read the | |
139 | ; generated assembly code (perhaps while debugging the compiler itself). | |
140 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
141 | ; to be a catchall for printing debug information in the assembler file. | |
142 | Variable | |
143 | int flag_debug_asm | |
144 | ||
145 | ; -dP causes the rtl to be emitted as a comment in assembly. | |
146 | Variable | |
147 | int flag_dump_rtl_in_asm | |
148 | ||
149 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
150 | Variable | |
151 | bool flag_dump_all_passed | |
152 | ||
153 | ; Other flags saying which kinds of debugging dump have been requested. | |
154 | ||
155 | Variable | |
156 | int rtl_dump_and_exit | |
157 | ||
158 | Variable | |
159 | int flag_print_asm_name | |
160 | ||
161 | Variable | |
162 | enum graph_dump_types graph_dump_format = no_graph | |
163 | ||
a803773f JM |
164 | ; Name of top-level original source file (what was input to cpp). |
165 | ; This comes from the #-command at the beginning of the actual input. | |
166 | ; If there isn't any there, then this is the cc1 input file name. | |
167 | Variable | |
168 | const char *main_input_filename | |
169 | ||
170 | ; Pointer to base name in main_input_filename, with directories and a | |
171 | ; single final extension removed, and the length of this base | |
172 | ; name. | |
173 | ||
174 | Variable | |
175 | const char *main_input_basename | |
176 | ||
177 | Variable | |
178 | int main_input_baselength | |
179 | ||
299404a1 JM |
180 | ; Which options have been printed by --help. |
181 | Variable | |
182 | char *help_printed | |
183 | ||
e6d4b984 JM |
184 | ; Which enums have been printed by --help. 0 = not printed, no |
185 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
186 | ; = printed. | |
187 | Variable | |
188 | char *help_enum_printed | |
189 | ||
299404a1 JM |
190 | ; The number of columns for --help output. |
191 | Variable | |
192 | unsigned int help_columns | |
193 | ||
194 | ; Whether this options structure has been through finish_options | |
195 | Variable | |
196 | bool flag_opts_finished | |
197 | ||
603349bf JM |
198 | ### |
199 | Driver | |
200 | ||
e200444e JM |
201 | -assemble |
202 | Driver Alias(S) | |
203 | ||
204 | -compile | |
205 | Driver Alias(c) | |
206 | ||
207 | -coverage | |
208 | Driver Alias(coverage) | |
209 | ||
210 | -debug | |
211 | Common Alias(g) | |
212 | ||
213 | -dump | |
214 | Common Separate Alias(d) | |
215 | ||
216 | -dump= | |
217 | Common Joined Alias(d) | |
218 | ||
219 | -dumpbase | |
220 | Common Separate Alias(dumpbase) | |
221 | ||
222 | -dumpdir | |
223 | Common Separate Alias(dumpdir) | |
224 | ||
225 | -entry | |
226 | Driver Separate Alias(e) | |
227 | ||
228 | -entry= | |
229 | Driver Joined Alias(e) | |
230 | ||
231 | -extra-warnings | |
232 | Common Warning Alias(Wextra) | |
233 | ||
234 | -for-assembler | |
235 | Driver Separate Alias(Xassembler) | |
236 | ||
237 | -for-assembler= | |
238 | Driver JoinedOrMissing Alias(Xassembler) | |
239 | ||
240 | -for-linker | |
241 | Driver Separate Alias(Xlinker) | |
242 | ||
243 | -for-linker= | |
244 | Driver JoinedOrMissing Alias(Xlinker) | |
245 | ||
246 | -force-link | |
247 | Driver Separate Alias(u) | |
248 | ||
249 | -force-link= | |
250 | Driver Joined Alias(u) | |
251 | ||
d185d268 | 252 | -help |
e200444e | 253 | Common Driver Var(help_flag) |
cf03fd63 | 254 | Display this information |
d185d268 | 255 | |
c662432e | 256 | -help= |
603349bf | 257 | Common Driver Report Joined |
c662432e | 258 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params |
903caebf | 259 | |
e200444e JM |
260 | -language |
261 | Driver Separate Alias(x) | |
262 | ||
263 | -language= | |
264 | Driver Joined Alias(x) | |
265 | ||
266 | -library-directory | |
267 | Driver Separate Alias(L) | |
268 | ||
269 | -library-directory= | |
270 | Driver Joined Alias(L) | |
271 | ||
272 | -no-canonical-prefixes | |
273 | Driver Alias(no-canonical-prefixes) | |
274 | ||
275 | -no-standard-libraries | |
276 | Driver Alias(nostdlib) | |
277 | ||
278 | -no-warnings | |
279 | Common Alias(w) | |
280 | ||
281 | -optimize | |
282 | Common Alias(O) | |
283 | ||
284 | -output | |
285 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
286 | ||
287 | -output= | |
288 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
289 | ||
290 | -pass-exit-codes | |
291 | Driver Alias(pass-exit-codes) | |
292 | ||
293 | -pedantic | |
294 | Common Alias(pedantic) | |
295 | ||
296 | -pedantic-errors | |
297 | Common Alias(pedantic-errors) | |
298 | ||
299 | -pie | |
300 | Common Alias(pie) | |
301 | ||
302 | -pipe | |
303 | Driver Alias(pipe) | |
304 | ||
305 | -prefix | |
306 | Driver Separate Alias(B) | |
307 | ||
308 | -prefix= | |
309 | Driver JoinedOrMissing Alias(B) | |
310 | ||
311 | -preprocess | |
312 | Driver Alias(E) | |
313 | ||
314 | -print-file-name | |
315 | Driver Separate Alias(print-file-name=) | |
316 | ||
317 | -print-file-name= | |
318 | Driver JoinedOrMissing Alias(print-file-name=) | |
319 | ||
320 | -print-libgcc-file-name | |
321 | Driver Alias(print-libgcc-file-name) | |
322 | ||
323 | -print-multi-directory | |
324 | Driver Alias(print-multi-directory) | |
325 | ||
326 | -print-multi-lib | |
327 | Driver Alias(print-multi-lib) | |
328 | ||
329 | -print-multi-os-directory | |
330 | Driver Alias(print-multi-os-directory) | |
331 | ||
332 | -print-prog-name | |
333 | Driver Separate Alias(print-prog-name=) | |
334 | ||
335 | -print-prog-name= | |
336 | Driver JoinedOrMissing Alias(print-prog-name=) | |
337 | ||
338 | -print-search-dirs | |
339 | Driver Alias(print-search-dirs) | |
340 | ||
341 | -print-sysroot | |
342 | Driver Alias(print-sysroot) | |
343 | ||
344 | -print-sysroot-headers-suffix | |
345 | Driver Alias(print-sysroot-headers-suffix) | |
346 | ||
347 | -profile | |
348 | Common Alias(p) | |
349 | ||
350 | -save-temps | |
351 | Driver Alias(save-temps) | |
352 | ||
353 | -shared | |
354 | Common Alias(shared) | |
355 | ||
356 | -specs | |
357 | Driver Separate Alias(specs=) | |
358 | ||
359 | -specs= | |
360 | Driver Joined Alias(specs=) | |
361 | ||
362 | -static | |
363 | Driver Alias(static) | |
364 | ||
365 | -symbolic | |
366 | Driver Alias(symbolic) | |
367 | ||
d185d268 | 368 | -target-help |
603349bf | 369 | Common Driver |
c662432e NC |
370 | Alias for --help=target |
371 | ||
e200444e JM |
372 | -time |
373 | Driver Alias(time) | |
374 | ||
375 | -verbose | |
376 | Driver Alias(v) | |
377 | ||
378 | ;; The driver used to convert options such as --help into forms such | |
379 | ;; as -fhelp; the following four entries are for compatibility with | |
380 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 381 | fhelp |
e200444e | 382 | Common Driver Alias(-help) |
c662432e NC |
383 | |
384 | fhelp= | |
e200444e | 385 | Common Driver Joined Alias(-help=) |
c662432e NC |
386 | |
387 | ftarget-help | |
e200444e | 388 | Common Driver Alias(-target-help) |
c662432e | 389 | |
41fd0f9b | 390 | fversion |
e200444e | 391 | Common Driver Alias(-version) |
41fd0f9b | 392 | |
c662432e NC |
393 | -param |
394 | Common Separate | |
395 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 | 396 | |
e200444e JM |
397 | -param= |
398 | Common Joined Alias(-param) | |
399 | ||
400 | -sysroot | |
401 | Driver Separate Alias(-sysroot=) | |
402 | ||
603349bf JM |
403 | -sysroot= |
404 | Driver JoinedOrMissing | |
405 | ||
d185d268 | 406 | -version |
603349bf JM |
407 | Common Driver |
408 | ||
409 | B | |
410 | Driver Joined Separate | |
411 | ||
412 | E | |
413 | Driver | |
d185d268 | 414 | |
d9d16a19 JM |
415 | L |
416 | Driver Joined Separate | |
417 | ||
dd9f93dc JM |
418 | N |
419 | Driver | |
420 | ||
903caebf | 421 | O |
ab442df7 | 422 | Common JoinedOrMissing Optimization |
cf03fd63 | 423 | -O<number> Set optimization level to <number> |
903caebf NB |
424 | |
425 | Os | |
ab442df7 | 426 | Common Optimization |
cf03fd63 | 427 | Optimize for space rather than speed |
903caebf | 428 | |
be6d3f0e RG |
429 | Ofast |
430 | Common Optimization | |
431 | Optimize for speed disregarding exact standards compliance | |
432 | ||
dd9f93dc JM |
433 | Q |
434 | Driver | |
435 | ||
436 | Qn | |
437 | Driver Negative(Qy) | |
438 | ||
439 | Qy | |
440 | Driver Negative(Qn) | |
441 | ||
6d721f67 JM |
442 | R |
443 | Driver Joined Separate | |
444 | ||
603349bf JM |
445 | S |
446 | Driver | |
447 | ||
6d721f67 JM |
448 | T |
449 | Driver Joined Separate | |
450 | ||
451 | Tbss | |
452 | Driver Separate | |
453 | ||
454 | Tdata | |
455 | Driver Separate | |
456 | ||
457 | Ttext | |
458 | Driver Separate | |
459 | ||
903caebf | 460 | W |
5de8299c | 461 | Common RejectNegative Warning Alias(Wextra) |
28786366 | 462 | This switch is deprecated; use -Wextra instead |
903caebf | 463 | |
603349bf JM |
464 | Wa, |
465 | Driver JoinedOrMissing | |
466 | ||
467 | Wl, | |
468 | Driver JoinedOrMissing | |
469 | ||
470 | Wp, | |
471 | Driver JoinedOrMissing | |
472 | ||
e01cc6dc | 473 | Waggregate-return |
c662432e | 474 | Common Var(warn_aggregate_return) Warning |
28786366 | 475 | Warn about returning structures, unions or arrays |
e01cc6dc | 476 | |
590b1f2d | 477 | Warray-bounds |
21af5cdf | 478 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
479 | Warn if an array is accessed out of bounds |
480 | ||
5c498b10 | 481 | Wattributes |
c662432e | 482 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
483 | Warn about inappropriate attribute usage |
484 | ||
e01cc6dc | 485 | Wcast-align |
c662432e | 486 | Common Var(warn_cast_align) Warning |
28786366 | 487 | Warn about pointer casts which increase alignment |
e01cc6dc | 488 | |
87cf0651 SB |
489 | Wcpp |
490 | Common Var(warn_cpp) Init(1) Warning | |
491 | Warn when a #warning directive is encountered | |
492 | ||
e01cc6dc | 493 | Wdeprecated-declarations |
c662432e | 494 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 495 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
496 | |
497 | Wdisabled-optimization | |
c662432e | 498 | Common Var(warn_disabled_optimization) Warning |
28786366 | 499 | Warn when an optimization pass is disabled |
e01cc6dc NB |
500 | |
501 | Werror | |
50431bc4 | 502 | Common Var(warnings_are_errors) |
28786366 | 503 | Treat all warnings as errors |
e01cc6dc | 504 | |
79cf5994 DD |
505 | Werror= |
506 | Common Joined | |
507 | Treat specified warning as error | |
508 | ||
903caebf | 509 | Wextra |
62a67c94 | 510 | Common Var(extra_warnings) Warning |
cf03fd63 | 511 | Print extra (possibly unwanted) warnings |
903caebf | 512 | |
c65a01af | 513 | Wfatal-errors |
50431bc4 | 514 | Common Var(flag_fatal_errors) |
c65a01af RG |
515 | Exit on the first error occurred |
516 | ||
a214518f SP |
517 | Wframe-larger-than= |
518 | Common RejectNegative Joined UInteger | |
f94e1d66 | 519 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 520 | |
e01cc6dc | 521 | Winline |
c662432e | 522 | Common Var(warn_inline) Warning |
28786366 | 523 | Warn when an inlined function cannot be inlined |
e01cc6dc NB |
524 | |
525 | Wlarger-than- | |
5de8299c | 526 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
527 | |
528 | Wlarger-than= | |
529 | Common RejectNegative Joined UInteger Warning | |
530 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 531 | |
f9cc1a70 | 532 | Wunsafe-loop-optimizations |
c662432e | 533 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
534 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
535 | ||
e01cc6dc | 536 | Wmissing-noreturn |
c662432e | 537 | Common Var(warn_missing_noreturn) Warning |
28786366 | 538 | Warn about functions which might be candidates for __attribute__((noreturn)) |
e01cc6dc | 539 | |
7621f5d5 VR |
540 | Wmudflap |
541 | Common Var(warn_mudflap) Init(1) Warning | |
542 | Warn about constructs not instrumented by -fmudflap | |
543 | ||
71834ad3 | 544 | Woverflow |
c662432e | 545 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
546 | Warn about overflow in arithmetic expressions |
547 | ||
e01cc6dc | 548 | Wpacked |
c662432e | 549 | Common Var(warn_packed) Warning |
28786366 | 550 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
551 | |
552 | Wpadded | |
c662432e | 553 | Common Var(warn_padded) Warning |
28786366 | 554 | Warn when padding is required to align structure members |
e01cc6dc NB |
555 | |
556 | Wshadow | |
c662432e | 557 | Common Var(warn_shadow) Warning |
28786366 | 558 | Warn when one local variable shadows another |
e01cc6dc | 559 | |
7d69de61 | 560 | Wstack-protector |
c662432e | 561 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
562 | Warn when not issuing stack smashing protection for some reason |
563 | ||
e01cc6dc | 564 | Wstrict-aliasing |
c662432e | 565 | Common Warning |
28786366 | 566 | Warn about code which might break strict aliasing rules |
e01cc6dc | 567 | |
5399d643 | 568 | Wstrict-aliasing= |
fcfbd84e | 569 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Init(-1) Warning |
5399d643 JW |
570 | Warn about code which might break strict aliasing rules |
571 | ||
6ac01510 | 572 | Wstrict-overflow |
21af5cdf | 573 | Common Warning |
6ac01510 ILT |
574 | Warn about optimizations that assume that signed overflow is undefined |
575 | ||
576 | Wstrict-overflow= | |
fcfbd84e | 577 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Init(-1) Warning |
6ac01510 ILT |
578 | Warn about optimizations that assume that signed overflow is undefined |
579 | ||
5dc16b19 MLI |
580 | Wsuggest-attribute=const |
581 | Common Var(warn_suggest_attribute_const) Warning | |
582 | Warn about functions which might be candidates for __attribute__((const)) | |
583 | ||
584 | Wsuggest-attribute=pure | |
585 | Common Var(warn_suggest_attribute_pure) Warning | |
586 | Warn about functions which might be candidates for __attribute__((pure)) | |
587 | ||
7ea6b6cf JH |
588 | Wsuggest-attribute=noreturn |
589 | Common Var(warn_suggest_attribute_noreturn) Warning | |
590 | Warn about functions which might be candidates for __attribute__((noreturn)) | |
591 | ||
e01cc6dc | 592 | Wswitch |
c662432e | 593 | Common Var(warn_switch) Warning |
28786366 | 594 | Warn about enumerated switches, with no default, missing a case |
e01cc6dc NB |
595 | |
596 | Wswitch-default | |
c662432e | 597 | Common Var(warn_switch_default) Warning |
28786366 | 598 | Warn about enumerated switches missing a \"default:\" statement |
e01cc6dc NB |
599 | |
600 | Wswitch-enum | |
c662432e | 601 | Common Var(warn_switch_enum) Warning |
28786366 | 602 | Warn about all enumerated switches missing a specific case |
e01cc6dc NB |
603 | |
604 | Wsystem-headers | |
c662432e | 605 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 606 | Do not suppress warnings from system headers |
e01cc6dc | 607 | |
8ffadef9 MG |
608 | Wtrampolines |
609 | Common Var(warn_trampolines) Warning | |
610 | Warn whenever a trampoline is generated | |
611 | ||
faebccf9 DN |
612 | Wtype-limits |
613 | Common Var(warn_type_limits) Init(-1) Warning | |
614 | Warn if a comparison is always true or always false due to the limited range of the data type | |
615 | ||
e01cc6dc | 616 | Wuninitialized |
62a67c94 | 617 | Common Var(warn_uninitialized) Init(-1) Warning |
28786366 | 618 | Warn about uninitialized automatic variables |
e01cc6dc NB |
619 | |
620 | Wunreachable-code | |
2d2bd949 | 621 | Common Ignore |
bc3c12a2 | 622 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 623 | |
903caebf | 624 | Wunused |
e73f7547 | 625 | Common Var(warn_unused) Init(0) Warning |
cf03fd63 | 626 | Enable all -Wunused- warnings |
903caebf | 627 | |
ebfbbdc5 JJ |
628 | Wunused-but-set-parameter |
629 | Common Var(warn_unused_but_set_parameter) Init(-1) Warning | |
630 | Warn when a function parameter is only set, otherwise unused | |
631 | ||
632 | Wunused-but-set-variable | |
633 | Common Var(warn_unused_but_set_variable) Init(-1) Warning | |
634 | Warn when a variable is only set, otherwise unused | |
635 | ||
e01cc6dc | 636 | Wunused-function |
e73f7547 | 637 | Common Var(warn_unused_function) Init(-1) Warning |
28786366 | 638 | Warn when a function is unused |
e01cc6dc NB |
639 | |
640 | Wunused-label | |
e73f7547 | 641 | Common Var(warn_unused_label) Init(-1) Warning |
28786366 | 642 | Warn when a label is unused |
e01cc6dc NB |
643 | |
644 | Wunused-parameter | |
e73f7547 | 645 | Common Var(warn_unused_parameter) Init(-1) Warning |
28786366 | 646 | Warn when a function parameter is unused |
e01cc6dc NB |
647 | |
648 | Wunused-value | |
e73f7547 | 649 | Common Var(warn_unused_value) Init(-1) Warning |
28786366 | 650 | Warn when an expression value is unused |
e01cc6dc NB |
651 | |
652 | Wunused-variable | |
e73f7547 | 653 | Common Var(warn_unused_variable) Init(-1) Warning |
28786366 | 654 | Warn when a variable is unused |
e01cc6dc | 655 | |
16c1c158 | 656 | Wcoverage-mismatch |
650cfcab NV |
657 | Common Var(warn_coverage_mismatch) Init(1) Warning |
658 | Warn in case profiles in -fprofile-use do not match | |
16c1c158 | 659 | |
603349bf JM |
660 | Xassembler |
661 | Driver Separate | |
662 | ||
663 | Xlinker | |
664 | Driver Separate | |
665 | ||
666 | Xpreprocessor | |
667 | Driver Separate | |
668 | ||
dd9f93dc JM |
669 | Z |
670 | Driver | |
671 | ||
d185d268 | 672 | aux-info |
d5478783 | 673 | Common Separate Var(aux_info_file_name) |
cf03fd63 | 674 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
675 | |
676 | aux-info= | |
5de8299c | 677 | Common Joined Alias(aux-info) |
d185d268 NB |
678 | |
679 | auxbase | |
d5478783 | 680 | Common Separate RejectDriver Var(aux_base_name) |
d185d268 NB |
681 | |
682 | auxbase-strip | |
603349bf JM |
683 | Common Separate RejectDriver |
684 | ||
e200444e JM |
685 | coverage |
686 | Driver | |
687 | ||
603349bf JM |
688 | c |
689 | Driver | |
d185d268 NB |
690 | |
691 | d | |
692 | Common Joined | |
cf03fd63 | 693 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
694 | |
695 | dumpbase | |
d5478783 | 696 | Common Separate Var(dump_base_name) |
cf03fd63 | 697 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 698 | |
d7fb0a6d | 699 | dumpdir |
d5478783 | 700 | Common Separate Var(dump_dir_name) |
316fc112 | 701 | -dumpdir <dir> Set the directory name to be used for dumps |
d7fb0a6d | 702 | |
603349bf JM |
703 | dumpmachine |
704 | Driver | |
705 | ||
706 | dumpspecs | |
707 | Driver | |
708 | ||
709 | dumpversion | |
710 | Driver | |
711 | ||
e200444e JM |
712 | e |
713 | Driver Joined Separate | |
714 | ||
fa381cb2 JM |
715 | ; This option has historically been passed down to the linker by an |
716 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
717 | ; as a single option. The supported option for this purpose is | |
718 | ; -rdynamic. See PR 47390. | |
719 | export-dynamic | |
720 | Driver Undocumented | |
721 | ||
31b66477 KC |
722 | ; The version of the C++ ABI in use. The following values are allowed: |
723 | ; | |
724 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
725 | ; specification. This ABI may change as bugs are discovered and fixed. | |
726 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
727 | ; versions of G++. | |
728 | ; | |
729 | ; 1: The version of the ABI first used in G++ 3.2. | |
730 | ; | |
abfe01ce JM |
731 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
732 | ; | |
733 | ; 3: The version of the ABI that fixes the missing underscore | |
734 | ; in template non-type arguments of pointer type. | |
735 | ; | |
736 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
737 | ; vector types. | |
99a8d35b | 738 | ; |
31b66477 KC |
739 | ; Additional positive integers will be assigned as new versions of |
740 | ; the ABI become the default version of the ABI. | |
57782ad8 | 741 | fabi-version= |
fcfbd84e | 742 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 743 | |
6ff3a151 | 744 | falign-functions |
ab442df7 | 745 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 746 | Align the start of functions |
6ff3a151 | 747 | |
058de654 | 748 | falign-functions= |
d5478783 | 749 | Common RejectNegative Joined UInteger Var(align_functions) |
058de654 | 750 | |
6ff3a151 | 751 | falign-jumps |
ab442df7 | 752 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 753 | Align labels which are only reached by jumping |
6ff3a151 | 754 | |
058de654 | 755 | falign-jumps= |
d5478783 | 756 | Common RejectNegative Joined UInteger Var(align_jumps) |
058de654 | 757 | |
6ff3a151 | 758 | falign-labels |
ab442df7 | 759 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 760 | Align all labels |
6ff3a151 | 761 | |
058de654 | 762 | falign-labels= |
d5478783 | 763 | Common RejectNegative Joined UInteger Var(align_labels) |
058de654 | 764 | |
6ff3a151 | 765 | falign-loops |
3020190e | 766 | Common Report Var(align_loops,0) Optimization UInteger |
f3fdaec4 | 767 | Align the start of loops |
6ff3a151 | 768 | |
058de654 | 769 | falign-loops= |
d5478783 | 770 | Common RejectNegative Joined UInteger Var(align_loops) |
058de654 | 771 | |
6ff3a151 | 772 | fargument-alias |
2d2bd949 | 773 | Common Ignore |
0d3c82d6 | 774 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
775 | |
776 | fargument-noalias | |
2d2bd949 | 777 | Common Ignore |
0d3c82d6 | 778 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
779 | |
780 | fargument-noalias-global | |
2d2bd949 | 781 | Common Ignore |
0d3c82d6 | 782 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 783 | |
0698a1d2 | 784 | fargument-noalias-anything |
2d2bd949 | 785 | Common Ignore |
0d3c82d6 | 786 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 787 | |
6ff3a151 | 788 | fasynchronous-unwind-tables |
c662432e | 789 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 790 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 791 | |
6fb5fa3c DB |
792 | fauto-inc-dec |
793 | Common Report Var(flag_auto_inc_dec) Init(1) | |
794 | Generate auto-inc/dec instructions | |
795 | ||
31b66477 KC |
796 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
797 | ; For C, C++ and ObjC: defaults off. | |
798 | ; For Java: defaults to on. | |
799 | ; For Fortran: defaults to off. | |
6ff3a151 | 800 | fbounds-check |
50431bc4 | 801 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 802 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
803 | |
804 | fbranch-count-reg | |
c662432e | 805 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
f3fdaec4 | 806 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
807 | |
808 | fbranch-probabilities | |
c662432e | 809 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 810 | Use profiling information for branch probabilities |
6ff3a151 | 811 | |
de32c0cb | 812 | fbranch-target-load-optimize |
c662432e | 813 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 814 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
815 | |
816 | fbranch-target-load-optimize2 | |
c662432e | 817 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 818 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 819 | |
1194fc79 | 820 | fbtr-bb-exclusive |
c662432e | 821 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
822 | Restrict target load migration not to re-use registers in any basic block |
823 | ||
058de654 | 824 | fcall-saved- |
21bf1558 | 825 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 826 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
827 | |
828 | fcall-used- | |
21bf1558 | 829 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 830 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 831 | |
31b66477 KC |
832 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
833 | ; be saved across function calls, if that produces overall better code. | |
834 | ; Optional now, so people can test it. | |
de32c0cb | 835 | fcaller-saves |
c662432e | 836 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 837 | Save registers around function calls |
de32c0cb | 838 | |
3d8864c0 SP |
839 | fcheck-data-deps |
840 | Common Report Var(flag_check_data_deps) | |
841 | Compare the results of several data dependence analyzers. | |
842 | ||
ccaeeafe NC |
843 | fcombine-stack-adjustments |
844 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
845 | Looks for opportunities to reduce stack adjustments and stack references. | |
846 | ||
6ff3a151 | 847 | fcommon |
c662432e | 848 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 849 | Do not put uninitialized globals in the common section |
6ff3a151 | 850 | |
603349bf JM |
851 | fcompare-debug |
852 | Driver | |
853 | ; Converted by the driver to -fcompare-debug= options. | |
854 | ||
2153915d | 855 | fcompare-debug= |
603349bf | 856 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
f94e1d66 | 857 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
858 | |
859 | fcompare-debug-second | |
5e471ea6 | 860 | Common Driver RejectNegative Var(flag_compare_debug) |
2153915d AO |
861 | Run only the second compilation of -fcompare-debug |
862 | ||
e692f276 RH |
863 | fcompare-elim |
864 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
865 | Perform comparison elimination after register allocation has finished | |
866 | ||
b5b8b0ac AO |
867 | fconserve-stack |
868 | Common Var(flag_conserve_stack) Optimization | |
869 | Do not perform optimizations increasing noticeably stack usage | |
870 | ||
6ff3a151 | 871 | fcprop-registers |
c662432e | 872 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 873 | Perform a register copy-propagation optimization pass |
6ff3a151 | 874 | |
de32c0cb | 875 | fcrossjumping |
c662432e | 876 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 877 | Perform cross-jumping optimization |
de32c0cb NB |
878 | |
879 | fcse-follow-jumps | |
c662432e | 880 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 881 | When running CSE, follow jumps to their targets |
de32c0cb NB |
882 | |
883 | fcse-skip-blocks | |
2d2bd949 | 884 | Common Ignore |
5f39ad47 | 885 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 886 | |
c7463669 | 887 | fcx-limited-range |
5e46b0c6 | 888 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
c7463669 RH |
889 | Omit range reduction step when performing complex division |
890 | ||
35085f76 JB |
891 | fcx-fortran-rules |
892 | Common Report Var(flag_cx_fortran_rules) Optimization | |
893 | Complex multiplication and division follow Fortran rules | |
894 | ||
6ff3a151 | 895 | fdata-sections |
c662432e | 896 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 897 | Place data items into their own section |
6ff3a151 | 898 | |
0a090f42 | 899 | fdbg-cnt-list |
299404a1 | 900 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
901 | List all available debugging counters with their limits and counts. |
902 | ||
6fb5fa3c | 903 | fdbg-cnt= |
299404a1 | 904 | Common RejectNegative Joined Var(common_deferred_options) Defer |
f94e1d66 | 905 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 906 | |
c8aea42c | 907 | fdebug-prefix-map= |
299404a1 | 908 | Common Joined RejectNegative Var(common_deferred_options) Defer |
c8aea42c PB |
909 | Map one directory name to another in debug information |
910 | ||
31b66477 KC |
911 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
912 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 913 | fdefer-pop |
c662432e | 914 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 915 | Defer popping functions args from stack until later |
de32c0cb NB |
916 | |
917 | fdelayed-branch | |
c662432e | 918 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 919 | Attempt to fill delay slots of branch instructions |
de32c0cb NB |
920 | |
921 | fdelete-null-pointer-checks | |
1ad2f450 | 922 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 923 | Delete useless null pointer checks |
de32c0cb | 924 | |
05842ff5 MJ |
925 | fdevirtualize |
926 | Common Report Var(flag_devirtualize) Optimization | |
927 | Try to convert virtual calls to direct ones. | |
928 | ||
de32c0cb | 929 | fdiagnostics-show-location= |
e6d4b984 | 930 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
cf03fd63 | 931 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 932 | |
e6d4b984 JM |
933 | ; Required for these enum values. |
934 | SourceInclude | |
935 | pretty-print.h | |
936 | ||
937 | Enum | |
938 | Name(diagnostic_prefixing_rule) Type(int) | |
939 | ||
940 | EnumValue | |
941 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
942 | ||
943 | EnumValue | |
944 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
945 | ||
ccf08a6e | 946 | fdiagnostics-show-option |
c7d0de89 | 947 | Common Var(flag_diagnostics_show_option) Init(1) |
c85ce869 | 948 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 949 | |
6de9cd9a | 950 | fdump- |
21bf1558 | 951 | Common Joined RejectNegative Var(common_deferred_options) Defer |
6de9cd9a DN |
952 | -fdump-<type> Dump various compiler internals to a file |
953 | ||
d1583032 JM |
954 | fdump-final-insns |
955 | Driver RejectNegative | |
956 | ||
2153915d AO |
957 | fdump-final-insns= |
958 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
959 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
960 | ||
c6a13190 ILT |
961 | fdump-go-spec= |
962 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
963 | -fdump-go-spec=filename Write all declarations to file as Go code | |
964 | ||
24a7799e R |
965 | fdump-noaddr |
966 | Common Report Var(flag_dump_noaddr) | |
967 | Suppress output of addresses in debugging dumps | |
968 | ||
6ff3a151 | 969 | fdump-unnumbered |
e90afde6 | 970 | Common Report Var(flag_dump_unnumbered) |
24a7799e | 971 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 972 | |
2aa7c49b | 973 | fdump-unnumbered-links |
e90afde6 | 974 | Common Report Var(flag_dump_unnumbered_links) |
2aa7c49b AO |
975 | Suppress output of previous and next insn numbers in debugging dumps |
976 | ||
b5b8b0ac AO |
977 | fdwarf2-cfi-asm |
978 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
979 | Enable CFI tables via GAS assembler directives. | |
980 | ||
355866de | 981 | fearly-inlining |
c662432e | 982 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
983 | Perform early inlining |
984 | ||
de32c0cb | 985 | feliminate-dwarf2-dups |
50431bc4 | 986 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 987 | Perform DWARF2 duplicate elimination |
de32c0cb | 988 | |
07ffa034 MJ |
989 | fipa-sra |
990 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
991 | Perform interprocedural reduction of aggregates | |
992 | ||
6a08f7b3 | 993 | feliminate-unused-debug-symbols |
50431bc4 | 994 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 995 | Perform unused type elimination in debug info |
6a08f7b3 | 996 | |
de32c0cb | 997 | feliminate-unused-debug-types |
50431bc4 | 998 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 999 | Perform unused type elimination in debug info |
de32c0cb | 1000 | |
e713adf6 | 1001 | femit-class-debug-always |
eae8e474 | 1002 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1003 | Do not suppress C++ class debug information. |
1004 | ||
77831620 CC |
1005 | fenable-icf-debug |
1006 | Common Report Var(flag_enable_icf_debug) | |
1007 | Generate debug information to support Identical Code Folding (ICF) | |
1008 | ||
6ff3a151 | 1009 | fexceptions |
c662432e | 1010 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 1011 | Enable exception handling |
6ff3a151 | 1012 | |
de32c0cb | 1013 | fexpensive-optimizations |
c662432e | 1014 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 1015 | Perform a number of minor, expensive optimizations |
de32c0cb | 1016 | |
8ce94e44 | 1017 | fexcess-precision= |
e6d4b984 | 1018 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) |
8ce94e44 JM |
1019 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision |
1020 | ||
e6d4b984 JM |
1021 | Enum |
1022 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1023 | ||
1024 | EnumValue | |
1025 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1026 | ||
1027 | EnumValue | |
1028 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1029 | ||
058de654 NB |
1030 | ffast-math |
1031 | Common | |
1032 | ||
6ff3a151 | 1033 | ffinite-math-only |
5e46b0c6 | 1034 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
f3fdaec4 | 1035 | Assume no NaNs or infinities are generated |
6ff3a151 | 1036 | |
058de654 | 1037 | ffixed- |
21bf1558 | 1038 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1039 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 1040 | |
de32c0cb | 1041 | ffloat-store |
c662432e | 1042 | Common Report Var(flag_float_store) Optimization |
31b66477 | 1043 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
1044 | |
1045 | fforce-addr | |
2d2bd949 | 1046 | Common Ignore |
3de5e93a | 1047 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1048 | |
2ca2b607 SB |
1049 | fforward-propagate |
1050 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
1051 | Perform a forward propagation pass on RTL |
1052 | ||
16949072 | 1053 | ffp-contract= |
e6d4b984 | 1054 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) |
16949072 RG |
1055 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
1056 | ||
e6d4b984 JM |
1057 | Enum |
1058 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1059 | ||
1060 | EnumValue | |
1061 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1062 | ||
1063 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1064 | EnumValue | |
1065 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1066 | ||
1067 | EnumValue | |
1068 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1069 | ||
31b66477 KC |
1070 | ; Nonzero means don't put addresses of constant functions in registers. |
1071 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1072 | ; done on the assembly output. | |
de32c0cb | 1073 | ffunction-cse |
50431bc4 | 1074 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 1075 | Allow function addresses to be held in registers |
de32c0cb | 1076 | |
6ff3a151 | 1077 | ffunction-sections |
50431bc4 | 1078 | Common Report Var(flag_function_sections) |
f3fdaec4 | 1079 | Place each function into its own section |
6ff3a151 | 1080 | |
de32c0cb | 1081 | fgcse |
c662432e | 1082 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 1083 | Perform global common subexpression elimination |
de32c0cb NB |
1084 | |
1085 | fgcse-lm | |
c662432e | 1086 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 1087 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
1088 | |
1089 | fgcse-sm | |
c662432e | 1090 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 1091 | Perform store motion after global common subexpression elimination |
de32c0cb | 1092 | |
f5f2e3cd | 1093 | fgcse-las |
c662432e | 1094 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
1095 | Perform redundant load after store elimination in global common subexpression |
1096 | elimination | |
1097 | ||
1098 | fgcse-after-reload | |
c662432e | 1099 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 1100 | Perform global common subexpression elimination after register allocation |
c85ce869 | 1101 | has finished |
f5f2e3cd | 1102 | |
d0a58904 | 1103 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
1104 | fgraphite |
1105 | Common Report Var(flag_graphite) | |
1106 | Enable in and out of Graphite representation | |
1107 | ||
204b560f SP |
1108 | fgraphite-identity |
1109 | Common Report Var(flag_graphite_identity) Optimization | |
1110 | Enable Graphite Identity transformation | |
1111 | ||
3cf0e270 SP |
1112 | floop-parallelize-all |
1113 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
1114 | Mark all loops as parallel |
1115 | ||
f8bf9252 SP |
1116 | floop-strip-mine |
1117 | Common Report Var(flag_loop_strip_mine) Optimization | |
1118 | Enable Loop Strip Mining transformation | |
1119 | ||
1120 | floop-interchange | |
1121 | Common Report Var(flag_loop_interchange) Optimization | |
1122 | Enable Loop Interchange transformation | |
1123 | ||
1124 | floop-block | |
1125 | Common Report Var(flag_loop_block) Optimization | |
1126 | Enable Loop Blocking transformation | |
1127 | ||
98af4c9f SP |
1128 | floop-flatten |
1129 | Common Report Var(flag_loop_flatten) Optimization | |
1130 | Enable Loop Flattening transformation | |
1131 | ||
6a78b724 DD |
1132 | fstrict-volatile-bitfields |
1133 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
1134 | Force bitfield accesses to match their type width | |
1135 | ||
6ff3a151 | 1136 | fguess-branch-probability |
c662432e | 1137 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 1138 | Enable guessing of branch probabilities |
6ff3a151 | 1139 | |
31b66477 KC |
1140 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1141 | ; Generate position-independent code for executables if possible | |
1142 | ; On SVR4 targets, it also controls whether or not to emit a | |
1143 | ; string identifying the compiler. | |
6ff3a151 | 1144 | fident |
50431bc4 | 1145 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 1146 | Process #ident directives |
6ff3a151 | 1147 | |
de32c0cb | 1148 | fif-conversion |
c662432e | 1149 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 1150 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
1151 | |
1152 | fif-conversion2 | |
c662432e | 1153 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 1154 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 1155 | |
384a5197 SP |
1156 | ftree-loop-if-convert |
1157 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1158 | Convert conditional jumps in innermost loops to branchless equivalents | |
1159 | ||
bd544141 SP |
1160 | ftree-loop-if-convert-stores |
1161 | Common Report Var(flag_tree_loop_if_convert_stores) Optimization | |
1162 | Also if-convert conditional jumps containing memory writes | |
1163 | ||
31b66477 KC |
1164 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1165 | ; This is used only for compiling crtstuff.c, | |
1166 | ; and it may be extended to other effects | |
1167 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1168 | finhibit-size-directive |
50431bc4 | 1169 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 1170 | Do not generate .size directives |
6ff3a151 | 1171 | |
3e293154 MJ |
1172 | findirect-inlining |
1173 | Common Report Var(flag_indirect_inlining) | |
1174 | Perform indirect inlining | |
1175 | ||
31b66477 KC |
1176 | ; Nonzero means that functions declared `inline' will be treated |
1177 | ; as `static'. Prevents generation of zillions of copies of unused | |
1178 | ; static inline functions; instead, `inlines' are written out | |
1179 | ; only when actually used. Used in conjunction with -g. Also | |
1180 | ; does the right thing with #pragma interface. | |
de32c0cb | 1181 | finline |
e90acd93 | 1182 | Common Report Var(flag_no_inline,0) Init(0) |
f3fdaec4 | 1183 | Pay attention to the \"inline\" keyword |
de32c0cb | 1184 | |
4d4b8cb9 JH |
1185 | finline-small-functions |
1186 | Common Report Var(flag_inline_small_functions) Optimization | |
1187 | Integrate simple functions into their callers when code size is known to not growth | |
1188 | ||
de32c0cb | 1189 | finline-functions |
c662432e | 1190 | Common Report Var(flag_inline_functions) Optimization |
f3fdaec4 | 1191 | Integrate simple functions into their callers |
de32c0cb | 1192 | |
355866de | 1193 | finline-functions-called-once |
c662432e | 1194 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
355866de | 1195 | Integrate functions called once into their callers |
d63db217 | 1196 | |
d302c9d6 | 1197 | finline-limit- |
5de8299c | 1198 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1199 | |
1200 | finline-limit= | |
1201 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1202 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 1203 | |
6ff3a151 | 1204 | finstrument-functions |
50431bc4 | 1205 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 1206 | Instrument function entry and exit with profiling calls |
6ff3a151 | 1207 | |
8d5a7d1f ILT |
1208 | finstrument-functions-exclude-function-list= |
1209 | Common RejectNegative Joined | |
1210 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
1211 | ||
1212 | finstrument-functions-exclude-file-list= | |
1213 | Common RejectNegative Joined | |
1214 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
1215 | ||
d6e14e8f | 1216 | fipa-cp |
c662432e | 1217 | Common Report Var(flag_ipa_cp) Optimization |
d6e14e8f SB |
1218 | Perform Interprocedural constant propagation |
1219 | ||
5e45130d JH |
1220 | fipa-cp-clone |
1221 | Common Report Var(flag_ipa_cp_clone) Optimization | |
1222 | Perform cloning to make Interprocedural constant propagation stronger | |
1223 | ||
e65bb9be JH |
1224 | fipa-profile |
1225 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
1226 | Perform interprocedural profile propagation | |
ea900239 | 1227 | |
4cf4d6a3 | 1228 | fipa-pta |
c662432e | 1229 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
1230 | Perform interprocedural points-to analysis |
1231 | ||
e65bb9be JH |
1232 | fipa-pure-const |
1233 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
1234 | Discover pure and const functions | |
1235 | ||
ea900239 | 1236 | fipa-reference |
c662432e | 1237 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
1238 | Discover readonly and non addressable static variables |
1239 | ||
43d861a5 | 1240 | fipa-matrix-reorg |
6ae4be32 | 1241 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
43d861a5 RL |
1242 | Perform matrix layout flattening and transposing based |
1243 | on profiling information. | |
1244 | ||
e1dc98b2 OG |
1245 | fipa-struct-reorg |
1246 | Common Report Var(flag_ipa_struct_reorg) | |
1247 | Perform structure layout optimizations based | |
1248 | on profiling information. | |
1249 | ||
058e97ec | 1250 | fira-algorithm= |
e6d4b984 | 1251 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) |
7db7ed3c VM |
1252 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
1253 | ||
e6d4b984 JM |
1254 | Enum |
1255 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1256 | ||
1257 | EnumValue | |
1258 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1259 | ||
1260 | EnumValue | |
1261 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1262 | ||
7db7ed3c | 1263 | fira-region= |
e6d4b984 | 1264 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_MIXED) |
7db7ed3c | 1265 | -fira-region=[one|all|mixed] Set regions for IRA |
058e97ec | 1266 | |
e6d4b984 JM |
1267 | Enum |
1268 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1269 | ||
1270 | EnumValue | |
1271 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1272 | ||
1273 | EnumValue | |
1274 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1275 | ||
1276 | EnumValue | |
1277 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1278 | ||
1833192f VM |
1279 | fira-loop-pressure |
1280 | Common Report Var(flag_ira_loop_pressure) | |
1281 | Use IRA based register pressure calculation | |
1282 | in RTL loop optimizations. | |
1283 | ||
058e97ec VM |
1284 | fira-share-save-slots |
1285 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
1286 | Share slots for saving different hard registers. | |
1287 | ||
1288 | fira-share-spill-slots | |
1289 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
1290 | Share stack slots for spilled pseudo-registers. | |
1291 | ||
1292 | fira-verbose= | |
5498f011 | 1293 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1294 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1295 | |
8b11a64c | 1296 | fivopts |
c662432e | 1297 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
1298 | Optimize induction variables on trees |
1299 | ||
82c0180d | 1300 | fjump-tables |
c662432e | 1301 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
1302 | Use jump tables for sufficiently large switch statements |
1303 | ||
de32c0cb | 1304 | fkeep-inline-functions |
50431bc4 | 1305 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 1306 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
1307 | |
1308 | fkeep-static-consts | |
50431bc4 | 1309 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 1310 | Emit static const variables even if they are not used |
de32c0cb | 1311 | |
6ff3a151 | 1312 | fleading-underscore |
50431bc4 | 1313 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 1314 | Give external symbols a leading underscore |
6ff3a151 | 1315 | |
efa1cdf0 | 1316 | floop-optimize |
2d2bd949 | 1317 | Common Ignore |
c0220ea4 | 1318 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1319 | |
d7f09764 | 1320 | flto |
014d92e1 | 1321 | Common |
d7f09764 DN |
1322 | Enable link-time optimization. |
1323 | ||
014d92e1 JH |
1324 | flto= |
1325 | Common RejectNegative Joined Var(flag_lto) | |
1326 | Link-time optimization with number of parallel jobs or jobserver. | |
1327 | ||
852e4bd2 JH |
1328 | flto-partition=1to1 |
1329 | Common Var(flag_lto_partition_1to1) | |
1330 | Partition functions and vars at linktime based on object files they originate from | |
1331 | ||
1332 | flto-partition=balanced | |
1333 | Common Var(flag_lto_partition_balanced) | |
1334 | Partition functions and vars at linktime into approximately same sized buckets | |
1335 | ||
014d92e1 JH |
1336 | flto-partition=none |
1337 | Common Var(flag_lto_partition_none) | |
1338 | Disable partioning and streaming | |
1339 | ||
d7f09764 DN |
1340 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1341 | flto-compression-level= | |
fcfbd84e | 1342 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
f94e1d66 | 1343 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 DN |
1344 | |
1345 | flto-report | |
1346 | Common Report Var(flag_lto_report) Init(0) Optimization | |
1347 | Report various link-time optimization statistics | |
1348 | ||
6ff3a151 | 1349 | fmath-errno |
5e46b0c6 | 1350 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1351 | Set errno after built-in math functions |
6ff3a151 | 1352 | |
3a789837 NF |
1353 | fmax-errors= |
1354 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
1355 | -fmax-errors=<number> Maximum number of errors to report | |
1356 | ||
6ff3a151 | 1357 | fmem-report |
50431bc4 | 1358 | Common Report Var(mem_report) |
f3fdaec4 | 1359 | Report on permanent memory allocation |
6ff3a151 | 1360 | |
31b66477 KC |
1361 | ; This will attempt to merge constant section constants, if 1 only |
1362 | ; string constants and constants from constant pool, if 2 also constant | |
1363 | ; variables. | |
6ff3a151 | 1364 | fmerge-all-constants |
c662432e | 1365 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 1366 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
1367 | |
1368 | fmerge-constants | |
f0036cca | 1369 | Common Report Var(flag_merge_constants,1) Optimization |
f3fdaec4 | 1370 | Attempt to merge identical constants across compilation units |
6ff3a151 | 1371 | |
28a08168 ILT |
1372 | fmerge-debug-strings |
1373 | Common Report Var(flag_merge_debug_strings) Init(1) | |
1374 | Attempt to merge identical debug strings across compilation units | |
1375 | ||
de32c0cb NB |
1376 | fmessage-length= |
1377 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1378 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 1379 | |
e5626198 | 1380 | fmodulo-sched |
c662432e | 1381 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
1382 | Perform SMS based modulo scheduling before the first scheduling pass |
1383 | ||
517d76fa VY |
1384 | fmodulo-sched-allow-regmoves |
1385 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
1386 | Perform SMS based modulo scheduling with register moves allowed | |
1387 | ||
5e962776 | 1388 | fmove-loop-invariants |
c662432e | 1389 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
5e962776 ZD |
1390 | Move loop invariant computations out of loops |
1391 | ||
6de9cd9a | 1392 | fmudflap |
50431bc4 | 1393 | Common RejectNegative Report Var(flag_mudflap) |
c85ce869 | 1394 | Add mudflap bounds-checking instrumentation for single-threaded program |
6de9cd9a DN |
1395 | |
1396 | fmudflapth | |
f0036cca | 1397 | Common RejectNegative Report Var(flag_mudflap,2) |
c85ce869 | 1398 | Add mudflap bounds-checking instrumentation for multi-threaded program |
6de9cd9a DN |
1399 | |
1400 | fmudflapir | |
50431bc4 | 1401 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
c85ce869 | 1402 | Ignore read operations when inserting mudflap instrumentation |
6de9cd9a | 1403 | |
6fb5fa3c | 1404 | fdce |
6ae4be32 | 1405 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
1406 | Use the RTL dead code elimination pass |
1407 | ||
1408 | fdse | |
6ae4be32 | 1409 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
1410 | Use the RTL dead store elimination pass |
1411 | ||
d72372e4 | 1412 | freschedule-modulo-scheduled-loops |
c662432e | 1413 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
1414 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
1415 | ||
6ff3a151 | 1416 | fnon-call-exceptions |
c662432e | 1417 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 1418 | Support synchronous non-call exceptions |
6ff3a151 | 1419 | |
de32c0cb | 1420 | fomit-frame-pointer |
c662432e | 1421 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 1422 | When possible do not generate stack frames |
de32c0cb | 1423 | |
6ff3a151 | 1424 | foptimize-register-move |
c662432e | 1425 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 1426 | Do the full register move optimization pass |
6ff3a151 | 1427 | |
de32c0cb | 1428 | foptimize-sibling-calls |
c662432e | 1429 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 1430 | Optimize sibling and tail recursive calls |
de32c0cb | 1431 | |
3e485f62 JH |
1432 | fpartial-inlining |
1433 | Common Report Var(flag_partial_inlining) | |
1434 | Perform partial inlining | |
1435 | ||
a5573239 JH |
1436 | fpre-ipa-mem-report |
1437 | Common Report Var(pre_ipa_mem_report) | |
1438 | Report on memory allocation before interprocedural optimization | |
1439 | ||
1440 | fpost-ipa-mem-report | |
1441 | Common Report Var(post_ipa_mem_report) | |
1442 | Report on memory allocation before interprocedural optimization | |
1443 | ||
6ff3a151 | 1444 | fpack-struct |
c662432e | 1445 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 1446 | Pack structure members together without holes |
6ff3a151 | 1447 | |
467cecf3 | 1448 | fpack-struct= |
c662432e | 1449 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
1450 | -fpack-struct=<number> Set initial maximum structure member alignment |
1451 | ||
de32c0cb | 1452 | fpcc-struct-return |
5498f011 | 1453 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
f3fdaec4 | 1454 | Return small aggregates in memory, not registers |
de32c0cb NB |
1455 | |
1456 | fpeel-loops | |
c662432e | 1457 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 1458 | Perform loop peeling |
de32c0cb NB |
1459 | |
1460 | fpeephole | |
c662432e | 1461 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 1462 | Enable machine specific peephole optimizations |
de32c0cb | 1463 | |
6ff3a151 | 1464 | fpeephole2 |
c662432e | 1465 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 1466 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 1467 | |
31b66477 KC |
1468 | fPIC |
1469 | Common Report Var(flag_pic,2) | |
1470 | Generate position-independent code if possible (large mode) | |
1471 | ||
1472 | fPIE | |
1473 | Common Report Var(flag_pie,2) | |
1474 | Generate position-independent code for executables if possible (large mode) | |
1475 | ||
6ff3a151 | 1476 | fpic |
f0036cca | 1477 | Common Report Var(flag_pic,1) |
31b66477 | 1478 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
1479 | |
1480 | fpie | |
f0036cca | 1481 | Common Report Var(flag_pie,1) |
31b66477 | 1482 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 1483 | |
68a607d8 | 1484 | fplugin= |
21bf1558 | 1485 | Common Joined RejectNegative Var(common_deferred_options) Defer |
68a607d8 DN |
1486 | Specify a plugin to load |
1487 | ||
1488 | fplugin-arg- | |
21bf1558 | 1489 | Common Joined RejectNegative Var(common_deferred_options) Defer |
f94e1d66 | 1490 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 1491 | |
bbc8a8dc | 1492 | fpredictive-commoning |
6ae4be32 | 1493 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
1494 | Run predictive commoning optimization. |
1495 | ||
de32c0cb | 1496 | fprefetch-loop-arrays |
1fbb509a | 1497 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
f3fdaec4 | 1498 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 1499 | |
6ff3a151 | 1500 | fprofile |
50431bc4 | 1501 | Common Report Var(profile_flag) |
f3fdaec4 | 1502 | Enable basic program profiling code |
6ff3a151 NB |
1503 | |
1504 | fprofile-arcs | |
50431bc4 | 1505 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 1506 | Insert arc-based program profiling code |
6ff3a151 | 1507 | |
2f908293 | 1508 | fprofile-dir= |
0576d21f | 1509 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
1510 | Set the top-level directory for storing the profile data. |
1511 | The default is 'pwd'. | |
1512 | ||
52c76998 PY |
1513 | fprofile-correction |
1514 | Common Report Var(flag_profile_correction) | |
1515 | Enable correction of flow inconsistent profile data input | |
1516 | ||
a8a5f53a JH |
1517 | fprofile-generate |
1518 | Common | |
1519 | Enable common options for generating profile info for profile feedback directed optimizations | |
1520 | ||
2f908293 SP |
1521 | fprofile-generate= |
1522 | Common Joined RejectNegative | |
1523 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
1524 | ||
a8a5f53a | 1525 | fprofile-use |
2f908293 | 1526 | Common Var(flag_profile_use) |
a8a5f53a JH |
1527 | Enable common options for performing profile feedback directed optimizations |
1528 | ||
2f908293 SP |
1529 | fprofile-use= |
1530 | Common Joined RejectNegative | |
1531 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
1532 | ||
fca9dc00 | 1533 | fprofile-values |
50431bc4 | 1534 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
1535 | Insert code to profile values of expressions |
1536 | ||
de32c0cb | 1537 | frandom-seed |
299404a1 | 1538 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
1539 | |
1540 | frandom-seed= | |
299404a1 | 1541 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1542 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 1543 | |
e0d9d0dd NC |
1544 | ; This switch causes the command line that was used to create an |
1545 | ; object file to be recorded into the object file. The exact format | |
1546 | ; of this recording is target and binary file format dependent. | |
1547 | ; It is related to the -fverbose-asm switch, but that switch only | |
1548 | ; records information in the assembler output file as comments, so | |
1549 | ; they never reach the object file. | |
1550 | frecord-gcc-switches | |
1551 | Common Report Var(flag_record_gcc_switches) | |
1552 | Record gcc command line switches in the object file. | |
1553 | ||
de32c0cb | 1554 | freg-struct-return |
f0036cca | 1555 | Common Report Var(flag_pcc_struct_return,0) Optimization |
f3fdaec4 | 1556 | Return small aggregates in registers |
de32c0cb | 1557 | |
6ff3a151 | 1558 | fregmove |
c662432e | 1559 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 1560 | Enables a register move optimization |
6ff3a151 NB |
1561 | |
1562 | frename-registers | |
c662432e | 1563 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 1564 | Perform a register renaming optimization pass |
6ff3a151 NB |
1565 | |
1566 | freorder-blocks | |
c662432e | 1567 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 1568 | Reorder basic blocks to improve code placement |
6ff3a151 | 1569 | |
750054a2 | 1570 | freorder-blocks-and-partition |
c662432e | 1571 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
1572 | Reorder basic blocks and partition into hot and cold sections |
1573 | ||
6ff3a151 | 1574 | freorder-functions |
c662432e | 1575 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 1576 | Reorder functions to improve code placement |
6ff3a151 | 1577 | |
de32c0cb | 1578 | frerun-cse-after-loop |
3020190e | 1579 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
f3fdaec4 | 1580 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1581 | |
efa1cdf0 | 1582 | frerun-loop-opt |
2d2bd949 | 1583 | Common Ignore |
c0220ea4 | 1584 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1585 | |
039c3d42 | 1586 | frounding-math |
5e46b0c6 | 1587 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
039c3d42 RS |
1588 | Disable optimizations that assume default FP rounding behavior |
1589 | ||
6ff3a151 | 1590 | fsched-interblock |
c662432e | 1591 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1592 | Enable scheduling across basic blocks |
6ff3a151 | 1593 | |
ce18efcb VM |
1594 | fsched-pressure |
1595 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1596 | Enable register pressure sensitive insn scheduling | |
1597 | ||
6ff3a151 | 1598 | fsched-spec |
c662432e | 1599 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1600 | Allow speculative motion of non-loads |
6ff3a151 NB |
1601 | |
1602 | fsched-spec-load | |
c662432e | 1603 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1604 | Allow speculative motion of some loads |
6ff3a151 NB |
1605 | |
1606 | fsched-spec-load-dangerous | |
c662432e | 1607 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1608 | Allow speculative motion of more loads |
6ff3a151 | 1609 | |
de32c0cb | 1610 | fsched-verbose= |
299404a1 | 1611 | Common RejectNegative Joined UInteger Var(sched_verbose_param) |
cf03fd63 | 1612 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1613 | |
6ff3a151 | 1614 | fsched2-use-superblocks |
c662432e | 1615 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1616 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1617 | |
1618 | fsched2-use-traces | |
2d2bd949 | 1619 | Common Ignore |
57257f0d | 1620 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1621 | |
de32c0cb | 1622 | fschedule-insns |
c662432e | 1623 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1624 | Reschedule instructions before register allocation |
de32c0cb NB |
1625 | |
1626 | fschedule-insns2 | |
c662432e | 1627 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1628 | Reschedule instructions after register allocation |
de32c0cb | 1629 | |
e855c69d AB |
1630 | ; This flag should be on when a target implements non-trivial |
1631 | ; scheduling hooks, maybe saving some information for its own sake. | |
1632 | ; On IA64, for example, this is used for correct bundling. | |
1633 | fselective-scheduling | |
1634 | Common Report Var(flag_selective_scheduling) Optimization | |
1635 | Schedule instructions using selective scheduling algorithm | |
1636 | ||
1637 | fselective-scheduling2 | |
1638 | Common Report Var(flag_selective_scheduling2) Optimization | |
1639 | Run selective scheduling after reload | |
1640 | ||
1641 | fsel-sched-pipelining | |
1642 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1643 | Perform software pipelining of inner loops during selective scheduling | |
1644 | ||
1645 | fsel-sched-pipelining-outer-loops | |
1646 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1647 | Perform software pipelining of outer loops during selective scheduling | |
1648 | ||
1649 | fsel-sched-reschedule-pipelined | |
1650 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1651 | Reschedule pipelined regions without pipelining | |
1652 | ||
31b66477 KC |
1653 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1654 | ; of stalled insns into the ready list. | |
569fa502 | 1655 | fsched-stalled-insns |
ab442df7 | 1656 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1657 | Allow premature scheduling of queued insns |
1658 | ||
1659 | fsched-stalled-insns= | |
c22cacf3 | 1660 | Common RejectNegative Joined UInteger |
4e994432 | 1661 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1662 | |
31b66477 KC |
1663 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1664 | ; be examined for a dependency on a stalled insn that is candidate for | |
1665 | ; premature removal from the queue of stalled insns into the ready list (has | |
1666 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1667 | fsched-stalled-insns-dep |
ab442df7 | 1668 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1669 | Set dependence distance checking in premature scheduling of queued insns |
1670 | ||
1671 | fsched-stalled-insns-dep= | |
1672 | Common RejectNegative Joined UInteger | |
4e994432 | 1673 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1674 | |
ee4764a8 GS |
1675 | fsched-group-heuristic |
1676 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1677 | Enable the group heuristic in the scheduler | |
1678 | ||
1679 | fsched-critical-path-heuristic | |
1680 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1681 | Enable the critical path heuristic in the scheduler | |
1682 | ||
1683 | fsched-spec-insn-heuristic | |
1684 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1685 | Enable the speculative instruction heuristic in the scheduler | |
1686 | ||
ee4764a8 GS |
1687 | fsched-rank-heuristic |
1688 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1689 | Enable the rank heuristic in the scheduler | |
1690 | ||
1691 | fsched-last-insn-heuristic | |
1692 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1693 | Enable the last instruction heuristic in the scheduler | |
1694 | ||
1695 | fsched-dep-count-heuristic | |
1696 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1697 | Enable the dependent count heuristic in the scheduler | |
1698 | ||
aacd3885 | 1699 | fsection-anchors |
c662432e | 1700 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
1701 | Access data in the same section from shared anchor points |
1702 | ||
8cd37d0b | 1703 | fsee |
2d2bd949 | 1704 | Common Ignore |
8393a9c8 | 1705 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 1706 | |
87a0ebfd ST |
1707 | fzee |
1708 | Common Report Var(flag_zee) Init(0) | |
1709 | Eliminate redundant zero extensions on targets that support implicit extensions. | |
1710 | ||
8abb6b22 | 1711 | fshow-column |
1cb42611 | 1712 | Common Report Var(flag_show_column) Init(1) |
e74fe492 | 1713 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 1714 | |
6ff3a151 | 1715 | fsignaling-nans |
5e46b0c6 | 1716 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
f3fdaec4 | 1717 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 1718 | |
db02da79 | 1719 | fsigned-zeros |
5e46b0c6 | 1720 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
db02da79 RS |
1721 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1722 | ||
6ff3a151 | 1723 | fsingle-precision-constant |
c662432e | 1724 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 1725 | Convert floating point constants to single precision constants |
6ff3a151 | 1726 | |
113d659a | 1727 | fsplit-ivs-in-unroller |
c662432e | 1728 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 1729 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 1730 | |
7458026b ILT |
1731 | fsplit-stack |
1732 | Common Report Var(flag_split_stack) Init(-1) | |
1733 | Generate discontiguous stack frames | |
1734 | ||
e53a16e7 | 1735 | fsplit-wide-types |
21af5cdf | 1736 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
1737 | Split wide types into independent registers |
1738 | ||
f37a4f14 | 1739 | fvariable-expansion-in-unroller |
c662432e | 1740 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 1741 | Apply variable expansion when loops are unrolled |
f37a4f14 | 1742 | |
b38f3813 EB |
1743 | fstack-check= |
1744 | Common Report RejectNegative Joined | |
1745 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1746 | ||
6ff3a151 | 1747 | fstack-check |
5de8299c | 1748 | Common Alias(fstack-check=, specific, no) |
b38f3813 | 1749 | Insert stack checking code into the program. Same as -fstack-check=specific |
6ff3a151 | 1750 | |
de32c0cb | 1751 | fstack-limit |
21bf1558 | 1752 | Common Var(common_deferred_options) Defer |
de32c0cb | 1753 | |
058de654 | 1754 | fstack-limit-register= |
21bf1558 | 1755 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1756 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
1757 | |
1758 | fstack-limit-symbol= | |
21bf1558 | 1759 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1760 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1761 | |
7d69de61 RH |
1762 | fstack-protector |
1763 | Common Report Var(flag_stack_protect, 1) | |
1764 | Use propolice as a stack protection method | |
1765 | ||
1766 | fstack-protector-all | |
f0036cca | 1767 | Common Report RejectNegative Var(flag_stack_protect, 2) |
7d69de61 RH |
1768 | Use a stack protection method for every function |
1769 | ||
d3c12306 EB |
1770 | fstack-usage |
1771 | Common RejectNegative Var(flag_stack_usage) | |
1772 | Output stack usage information on a per-function basis | |
1773 | ||
de32c0cb | 1774 | fstrength-reduce |
2d2bd949 | 1775 | Common Ignore |
c0220ea4 | 1776 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1777 | |
31b66477 KC |
1778 | ; Nonzero if we should do (language-dependent) alias analysis. |
1779 | ; Typically, this analysis will assume that expressions of certain | |
1780 | ; types do not alias expressions of certain other types. Only used | |
1781 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 1782 | fstrict-aliasing |
c662432e | 1783 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 1784 | Assume strict aliasing rules apply |
6ff3a151 | 1785 | |
eeef0e45 ILT |
1786 | fstrict-overflow |
1787 | Common Report Var(flag_strict_overflow) | |
1788 | Treat signed overflow as undefined | |
1789 | ||
de32c0cb | 1790 | fsyntax-only |
50431bc4 | 1791 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 1792 | Check for syntax errors, then stop |
de32c0cb | 1793 | |
6ff3a151 | 1794 | ftest-coverage |
50431bc4 | 1795 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 1796 | Create data files needed by \"gcov\" |
6ff3a151 | 1797 | |
de32c0cb | 1798 | fthread-jumps |
c662432e | 1799 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 1800 | Perform jump threading optimizations |
de32c0cb | 1801 | |
6ff3a151 | 1802 | ftime-report |
50431bc4 | 1803 | Common Report Var(time_report) |
f3fdaec4 | 1804 | Report the time taken by each compiler pass |
6ff3a151 | 1805 | |
058de654 | 1806 | ftls-model= |
e6d4b984 | 1807 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
cf03fd63 | 1808 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 1809 | |
e6d4b984 JM |
1810 | Enum |
1811 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
1812 | ||
1813 | EnumValue | |
1814 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
1815 | ||
1816 | EnumValue | |
1817 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
1818 | ||
1819 | EnumValue | |
1820 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
1821 | ||
1822 | EnumValue | |
1823 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
1824 | ||
474eccc6 | 1825 | ftoplevel-reorder |
d6cc6ec9 | 1826 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
1827 | Reorder top level functions, variables, and asms |
1828 | ||
de32c0cb | 1829 | ftracer |
50431bc4 | 1830 | Common Report Var(flag_tracer) |
f3fdaec4 | 1831 | Perform superblock formation via tail duplication |
de32c0cb | 1832 | |
31b66477 KC |
1833 | ; Zero means that floating-point math operations cannot generate a |
1834 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1835 | ; IEEE 754 arithmetic. | |
6ff3a151 | 1836 | ftrapping-math |
5e46b0c6 | 1837 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1838 | Assume floating-point operations can trap |
6ff3a151 NB |
1839 | |
1840 | ftrapv | |
c662432e | 1841 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 1842 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 1843 | |
6de9cd9a | 1844 | ftree-ccp |
c662432e | 1845 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
1846 | Enable SSA-CCP optimization on trees |
1847 | ||
0b4b14ac RG |
1848 | ftree-bit-ccp |
1849 | Common Report Var(flag_tree_bit_ccp) Optimization | |
1850 | Enable SSA-BIT-CCP optimization on trees | |
1851 | ||
0bca51f0 | 1852 | ftree-store-ccp |
2d2bd949 | 1853 | Common Ignore |
dce2b2f6 | 1854 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1855 | |
6de9cd9a | 1856 | ftree-ch |
c662432e | 1857 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
1858 | Enable loop header copying on trees |
1859 | ||
6de9cd9a | 1860 | ftree-copyrename |
c662432e | 1861 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 1862 | Replace SSA temporaries with better names in copies |
6de9cd9a | 1863 | |
0bca51f0 | 1864 | ftree-copy-prop |
c662432e | 1865 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
1866 | Enable copy propagation on trees |
1867 | ||
1868 | ftree-store-copy-prop | |
2d2bd949 | 1869 | Common Ignore |
e9033855 | 1870 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1871 | |
a5828d1e MM |
1872 | ftree-cselim |
1873 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1874 | Transform condition stores into unconditional ones | |
1875 | ||
b6e99746 MJ |
1876 | ftree-switch-conversion |
1877 | Common Report Var(flag_tree_switch_conversion) Optimization | |
1878 | Perform conversions of switch initializations. | |
1879 | ||
6de9cd9a | 1880 | ftree-dce |
c662432e | 1881 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
1882 | Enable SSA dead code elimination optimization on trees |
1883 | ||
1884 | ftree-dominator-opts | |
c662432e | 1885 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
1886 | Enable dominator optimizations |
1887 | ||
1888 | ftree-dse | |
c662432e | 1889 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
1890 | Enable dead store elimination |
1891 | ||
248fc9f3 RG |
1892 | ftree-forwprop |
1893 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
1894 | Enable forward propagation on trees | |
1895 | ||
ff2ad0f7 | 1896 | ftree-fre |
c662432e | 1897 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
1898 | Enable Full Redundancy Elimination (FRE) on trees |
1899 | ||
dea61d92 | 1900 | ftree-loop-distribution |
53ed2f0e | 1901 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
1902 | Enable loop distribution on trees |
1903 | ||
20769d5e SP |
1904 | ftree-loop-distribute-patterns |
1905 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
1906 | Enable loop distribution for patterns transformed into a library call | |
1907 | ||
1b08d87d | 1908 | ftree-loop-im |
c662432e | 1909 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
1910 | Enable loop invariant motion on trees |
1911 | ||
599eabdb | 1912 | ftree-loop-linear |
7633415c SP |
1913 | Common Alias(floop-interchange) |
1914 | Enable loop interchange transforms. Same as -floop-interchange | |
599eabdb | 1915 | |
1b08d87d | 1916 | ftree-loop-ivcanon |
c662432e | 1917 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
1918 | Create canonical induction variables in loops |
1919 | ||
c66b6c66 | 1920 | ftree-loop-optimize |
c662432e | 1921 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
1922 | Enable loop optimizations on tree level |
1923 | ||
5f40b3cb | 1924 | ftree-parallelize-loops= |
fcfbd84e | 1925 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
5f40b3cb ZD |
1926 | Enable automatic parallelization of loops |
1927 | ||
248fc9f3 RG |
1928 | ftree-phiprop |
1929 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
1930 | Enable hoisting loads from conditional pointers. | |
1931 | ||
6de9cd9a | 1932 | ftree-pre |
c662432e | 1933 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
1934 | Enable SSA-PRE optimization on trees |
1935 | ||
248fc9f3 RG |
1936 | ftree-pta |
1937 | Common Report Var(flag_tree_pta) Init(1) Optimization | |
1938 | Perform function-local points-to analysis on trees. | |
1939 | ||
13c59415 UB |
1940 | ftree-reassoc |
1941 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1942 | Enable reassociation on tree level | |
1943 | ||
c75ab022 | 1944 | ftree-salias |
2d2bd949 | 1945 | Common Ignore |
1353232d | 1946 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 1947 | |
fa555252 | 1948 | ftree-sink |
c662432e | 1949 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
1950 | Enable SSA code sinking on trees |
1951 | ||
6de9cd9a | 1952 | ftree-sra |
c662432e | 1953 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
1954 | Perform scalar replacement of aggregates |
1955 | ||
1956 | ftree-ter | |
3020190e | 1957 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
1958 | Replace temporary expressions in the SSA->normal pass |
1959 | ||
c662432e NC |
1960 | ftree-lrs |
1961 | Common Report Var(flag_tree_live_range_split) Optimization | |
1962 | Perform live range splitting during the SSA->normal pass | |
1963 | ||
0bca51f0 | 1964 | ftree-vrp |
c662432e | 1965 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
1966 | Perform Value Range Propagation on trees |
1967 | ||
de32c0cb | 1968 | funit-at-a-time |
d6cc6ec9 | 1969 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 1970 | Compile whole compilation unit at a time |
de32c0cb NB |
1971 | |
1972 | funroll-loops | |
c662432e | 1973 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 1974 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
1975 | |
1976 | funroll-all-loops | |
c662432e | 1977 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 1978 | Perform loop unrolling for all loops |
de32c0cb | 1979 | |
f9cc1a70 PB |
1980 | ; Nonzero means that loop optimizer may assume that the induction variables |
1981 | ; that control loops do not overflow and that the loops with nontrivial | |
1982 | ; exit condition are not infinite | |
1983 | funsafe-loop-optimizations | |
c662432e | 1984 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
1985 | Allow loop optimizations to assume that the loops behave in normal way |
1986 | ||
a1a82611 | 1987 | fassociative-math |
5e46b0c6 | 1988 | Common Report Var(flag_associative_math) SetByCombined |
a1a82611 RE |
1989 | Allow optimization for floating-point arithmetic which may change the |
1990 | result of the operation due to rounding. | |
1991 | ||
1992 | freciprocal-math | |
5e46b0c6 | 1993 | Common Report Var(flag_reciprocal_math) SetByCombined |
a1a82611 RE |
1994 | Same as -fassociative-math for expressions which include division. |
1995 | ||
31b66477 KC |
1996 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
1997 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
1998 | ; are allowed to assume that their arguments and results are "normal" | |
1999 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2000 | funsafe-math-optimizations |
5e46b0c6 | 2001 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
f3fdaec4 | 2002 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 2003 | |
de32c0cb | 2004 | funswitch-loops |
c662432e | 2005 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 2006 | Perform loop unswitching |
de32c0cb | 2007 | |
6ff3a151 | 2008 | funwind-tables |
c662432e | 2009 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 2010 | Just generate unwind tables for exception handling |
6ff3a151 | 2011 | |
da18ea94 RAE |
2012 | fuse-linker-plugin |
2013 | Common Undocumented | |
2014 | ||
e90afde6 JM |
2015 | ; Positive if we should track variables, negative if we should run |
2016 | ; the var-tracking pass only to discard debug annotations, zero if | |
2017 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2018 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2019 | ; in process_options (). | |
014a1138 | 2020 | fvar-tracking |
e90afde6 | 2021 | Common Report Var(flag_var_tracking) Init(2) Optimization |
014a1138 JZ |
2022 | Perform variable tracking |
2023 | ||
e90afde6 JM |
2024 | ; Positive if we should track variables at assignments, negative if |
2025 | ; we should run the var-tracking pass only to discard debug | |
2026 | ; annotations. When flag_var_tracking_assignments == | |
2027 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2028 | fvar-tracking-assignments |
e90afde6 | 2029 | Common Report Var(flag_var_tracking_assignments) Init(2) Optimization |
b5b8b0ac AO |
2030 | Perform variable tracking by annotating assignments |
2031 | ||
e90afde6 JM |
2032 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2033 | ; processing options and computing its default. */ | |
b5b8b0ac | 2034 | fvar-tracking-assignments-toggle |
e90afde6 | 2035 | Common Report Var(flag_var_tracking_assignments_toggle) Optimization |
b5b8b0ac AO |
2036 | Toggle -fvar-tracking-assignments |
2037 | ||
62760ffd CT |
2038 | fvar-tracking-uninit |
2039 | Common Report Var(flag_var_tracking_uninit) Optimization | |
2040 | Perform variable tracking and also tag variables that are uninitialized | |
2041 | ||
79fe1b3b | 2042 | ftree-vectorize |
c662432e | 2043 | Common Report Var(flag_tree_vectorize) Optimization |
79fe1b3b DN |
2044 | Enable loop vectorization on trees |
2045 | ||
a70d6342 IR |
2046 | ftree-slp-vectorize |
2047 | Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization | |
2048 | Enable basic block vectorization (SLP) on trees | |
2049 | ||
792ed98b HJ |
2050 | fvect-cost-model |
2051 | Common Report Var(flag_vect_cost_model) Optimization | |
2052 | Enable use of cost model in vectorization | |
2053 | ||
c12cc930 | 2054 | ftree-vect-loop-version |
c662432e | 2055 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
c12cc930 KB |
2056 | Enable loop versioning when doing loop vectorization on trees |
2057 | ||
c866976a | 2058 | ftree-vectorizer-verbose= |
7cd23050 | 2059 | Common RejectNegative Joined UInteger |
4e994432 | 2060 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
c866976a | 2061 | |
fbf798fc | 2062 | ftree-scev-cprop |
21af5cdf | 2063 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2064 | Enable copy propagation of scalar-evolution information. |
2065 | ||
31b66477 KC |
2066 | ; -fverbose-asm causes extra commentary information to be produced in |
2067 | ; the generated assembly code (to make it more readable). This option | |
2068 | ; is generally only of use to those who actually need to read the | |
2069 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2070 | ; -fno-verbose-asm, the default, causes the extra information | |
2071 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 2072 | fverbose-asm |
50431bc4 | 2073 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 2074 | Add extra commentary to assembler output |
6ff3a151 | 2075 | |
d7afec4b | 2076 | fvisibility= |
e6d4b984 | 2077 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
d7afec4b ND |
2078 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility |
2079 | ||
e6d4b984 JM |
2080 | Enum |
2081 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
2082 | ||
2083 | EnumValue | |
2084 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
2085 | ||
2086 | EnumValue | |
2087 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
2088 | ||
2089 | EnumValue | |
2090 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
2091 | ||
2092 | EnumValue | |
2093 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 2094 | |
fca9dc00 | 2095 | fvpt |
c662432e | 2096 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
2097 | Use expression value profiles in optimizations |
2098 | ||
62551c66 | 2099 | fweb |
c662432e | 2100 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
2101 | Construct webs and split unrelated uses of single variable |
2102 | ||
c2699190 XDL |
2103 | ftree-builtin-call-dce |
2104 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
2105 | Enable conditional dead code elimination for builtin calls | |
2106 | ||
ce91e74c | 2107 | fwhole-program |
c662432e | 2108 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
2109 | Perform whole program optimizations |
2110 | ||
6ff3a151 | 2111 | fwrapv |
c662432e | 2112 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 2113 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 2114 | |
6ff3a151 | 2115 | fzero-initialized-in-bss |
50431bc4 | 2116 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 2117 | Put zero initialized data in the bss section |
6ff3a151 | 2118 | |
e01cc6dc NB |
2119 | g |
2120 | Common JoinedOrMissing | |
df38ffef NB |
2121 | Generate debug information in default format |
2122 | ||
2123 | gcoff | |
53b2323e | 2124 | Common JoinedOrMissing Negative(gdwarf-) |
df38ffef NB |
2125 | Generate debug information in COFF format |
2126 | ||
53b2323e RH |
2127 | gdwarf- |
2128 | Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs) | |
2129 | Generate debug information in DWARF v2 (or later) format | |
df38ffef NB |
2130 | |
2131 | ggdb | |
2132 | Common JoinedOrMissing | |
2133 | Generate debug information in default extended format | |
2134 | ||
2135 | gstabs | |
14c7833c | 2136 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
2137 | Generate debug information in STABS format |
2138 | ||
2139 | gstabs+ | |
14c7833c | 2140 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
2141 | Generate debug information in extended STABS format |
2142 | ||
65f753a0 | 2143 | gno-strict-dwarf |
047a3193 | 2144 | Common RejectNegative Var(dwarf_strict,0) Init(-1) |
65f753a0 JJ |
2145 | Emit DWARF additions beyond selected version |
2146 | ||
2147 | gstrict-dwarf | |
f0036cca | 2148 | Common Report RejectNegative Var(dwarf_strict,1) |
65f753a0 JJ |
2149 | Don't emit DWARF additions beyond selected version |
2150 | ||
2153915d AO |
2151 | gtoggle |
2152 | Common Report Var(flag_gtoggle) | |
2153 | Toggle debug information generation | |
2154 | ||
df38ffef | 2155 | gvms |
14c7833c | 2156 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
2157 | Generate debug information in VMS format |
2158 | ||
2159 | gxcoff | |
14c7833c | 2160 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
2161 | Generate debug information in XCOFF format |
2162 | ||
2163 | gxcoff+ | |
14c7833c | 2164 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 2165 | Generate debug information in extended XCOFF format |
e01cc6dc | 2166 | |
6d721f67 JM |
2167 | h |
2168 | Driver Joined Separate | |
2169 | ||
4adbd5dd MK |
2170 | iplugindir= |
2171 | Common Joined Var(plugindir_string) Init(0) | |
2172 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
2173 | ||
603349bf JM |
2174 | l |
2175 | Driver Joined Separate | |
2176 | ||
dd9f93dc JM |
2177 | n |
2178 | Driver | |
2179 | ||
603349bf JM |
2180 | no-canonical-prefixes |
2181 | Driver | |
2182 | ||
d9d16a19 JM |
2183 | nodefaultlibs |
2184 | Driver | |
2185 | ||
bab79a40 JM |
2186 | nostartfiles |
2187 | Driver | |
2188 | ||
d9d16a19 JM |
2189 | nostdlib |
2190 | Driver | |
2191 | ||
d185d268 | 2192 | o |
d5478783 | 2193 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
cf03fd63 | 2194 | -o <file> Place output into <file> |
d185d268 NB |
2195 | |
2196 | p | |
50431bc4 | 2197 | Common Var(profile_flag) |
cf03fd63 | 2198 | Enable function profiling |
d185d268 | 2199 | |
603349bf JM |
2200 | pass-exit-codes |
2201 | Driver Var(pass_exit_codes) | |
2202 | ||
d185d268 | 2203 | pedantic |
50431bc4 | 2204 | Common Var(pedantic) |
cf03fd63 | 2205 | Issue warnings needed for strict compliance to the standard |
d185d268 NB |
2206 | |
2207 | pedantic-errors | |
d5478783 | 2208 | Common Var(flag_pedantic_errors) |
cf03fd63 | 2209 | Like -pedantic but issue them as errors |
d185d268 | 2210 | |
d9d16a19 JM |
2211 | pg |
2212 | Driver | |
2213 | ||
603349bf JM |
2214 | pipe |
2215 | Driver Var(use_pipes) | |
2216 | ||
2217 | print-file-name= | |
2218 | Driver JoinedOrMissing Var(print_file_name) | |
2219 | ||
2220 | print-libgcc-file-name | |
2221 | Driver | |
2222 | ||
2223 | print-multi-directory | |
2224 | Driver Var(print_multi_directory) | |
2225 | ||
2226 | print-multi-lib | |
2227 | Driver Var(print_multi_lib) | |
2228 | ||
2229 | print-multi-os-directory | |
2230 | Driver Var(print_multi_os_directory) | |
2231 | ||
2232 | print-prog-name= | |
2233 | Driver JoinedOrMissing Var(print_prog_name) | |
2234 | ||
2235 | print-search-dirs | |
2236 | Driver Var(print_search_dirs) | |
2237 | ||
2238 | print-sysroot | |
2239 | Driver Var(print_sysroot) | |
2240 | ||
2241 | print-sysroot-headers-suffix | |
2242 | Driver Var(print_sysroot_headers_suffix) | |
2243 | ||
d7b42618 | 2244 | quiet |
603349bf | 2245 | Common Var(quiet_flag) RejectDriver |
cf03fd63 | 2246 | Do not display functions compiled or elapsed time |
d7b42618 | 2247 | |
dd9f93dc JM |
2248 | r |
2249 | Driver | |
2250 | ||
2251 | s | |
2252 | Driver | |
2253 | ||
603349bf JM |
2254 | save-temps |
2255 | Driver | |
2256 | ||
2257 | save-temps= | |
2258 | Driver Joined | |
2259 | ||
dd9f93dc JM |
2260 | t |
2261 | Driver | |
2262 | ||
603349bf JM |
2263 | time |
2264 | Driver Var(report_times) | |
2265 | ||
2266 | time= | |
2267 | Driver JoinedOrMissing | |
2268 | ||
e200444e JM |
2269 | u |
2270 | Driver Joined Separate | |
2271 | ||
5642f5d5 JM |
2272 | undef |
2273 | Driver | |
2274 | ; C option, but driver must not handle as "-u ndef". | |
2275 | ||
603349bf | 2276 | v |
d5478783 JM |
2277 | Common Driver Var(verbose_flag) |
2278 | Enable verbose output | |
603349bf | 2279 | |
d185d268 | 2280 | version |
603349bf | 2281 | Common Var(version_flag) RejectDriver |
cf03fd63 | 2282 | Display the compiler's version |
d185d268 NB |
2283 | |
2284 | w | |
50431bc4 | 2285 | Common Var(inhibit_warnings) |
cf03fd63 | 2286 | Suppress warnings |
d185d268 | 2287 | |
603349bf JM |
2288 | wrapper |
2289 | Driver Separate Var(wrapper_string) | |
2290 | ||
2291 | x | |
2292 | Driver Joined Separate | |
2293 | ||
528dc603 L |
2294 | shared |
2295 | Common RejectNegative Negative(pie) | |
2296 | Create a shared library | |
2297 | ||
603349bf JM |
2298 | shared-libgcc |
2299 | Driver | |
2300 | ||
2301 | specs | |
5de8299c | 2302 | Driver Separate Alias(specs=) |
603349bf JM |
2303 | |
2304 | specs= | |
2305 | Driver Joined | |
2306 | ||
d9d16a19 JM |
2307 | static |
2308 | Driver | |
2309 | ||
603349bf JM |
2310 | static-libgcc |
2311 | Driver | |
2312 | ||
2313 | static-libgfortran | |
2314 | Driver | |
2315 | ; Documented for Fortran, but always accepted by driver. | |
2316 | ||
2317 | static-libstdc++ | |
2318 | Driver | |
2319 | ||
7a938933 ILT |
2320 | static-libgo |
2321 | Driver | |
2322 | ; Documented for Go, but always accepted by driver. | |
2323 | ||
e200444e JM |
2324 | symbolic |
2325 | Driver | |
2326 | ||
528dc603 L |
2327 | pie |
2328 | Common RejectNegative Negative(shared) | |
2329 | Create a position independent executable | |
2330 | ||
6d721f67 JM |
2331 | z |
2332 | Driver Joined Separate | |
2333 | ||
d7b42618 | 2334 | ; This comment is to ensure we retain the blank line above. |